Patent Publication Number: US-11034538-B2

Title: Sheet supply system and sheet supply method

Description:
TECHNICAL FIELD 
     The present invention relates to a sheet supply system and a sheet supply method for supplying a sheet from a roll including a tubular core member and the sheet wound around a periphery of the core member. 
     BACKGROUND ART 
     Conventionally, when various types of processing are performed on a sheet, the sheet is continuously fed from a roll formed by winding the sheet around a periphery of a core member, and is supplied to a processing device or the like. 
     For example, a disposable diaper is formed of a plurality of sheets with different materials and width, such as a nonwoven fabric, a film, and a tissue. When this diaper is manufactured, each sheet is continuously fed from a plurality of types of rolls formed of various sheets, and various types of processing are performed. 
     As a system for continuously feeding a sheet in this way, WO 2016/002531 discloses a system including a sheet supply device that rotatably holds a roll and feeds and supplies the sheet sequentially from this roll. In the system of WO 2016/002531, in the sheet supply device, a sheet of a new roll is joined to a sheet of a roll in use with a small remaining amount. Also, before a sheet of one roll runs out, a sheet is supplied from a new roll continuously. 
     Specifically, in the system of WO 2016/002531, the sheet supply device is provided with one pair of holding shafts each penetrating a center of a roll and holding the roll, a tape affixing unit for affixing a tape to an end of a sheet, a joining unit for joining two sheets via the tape, and an operation robot that can grasp and convey the end of the sheet of the roll. Then, when a remaining amount of the sheet of one roll becomes small, the operation robot conveys the end of the sheet of the other roll to the tape affixing unit. Then, the tape affixing unit affixes the tape to the end of the sheet, and subsequently, the joining unit joins the other sheet to one sheet. 
     The system of WO 2016/002531 automatically joins the new sheet to the sheet in use with a small remaining amount and supplies the sheet without interruption, enhancing work efficiency. 
     However, even in this system, a worker has to set a new roll in the holding shaft of the sheet supply device. That is, every time when a remaining amount of the sheet of one of the two rolls decreases and use of this roll is stopped, it is necessary to eliminate the one roll from the sheet supply device, to convey a new roll to the sheet supply device, and to set this new roll in the holding shaft. Moreover, the roll sometimes weighs more than 100 kg, for example, and is not easy to handle. Therefore, there is a problem that work efficiency is not sufficiently high. 
     SUMMARY OF INVENTION 
     The present invention has been made to solve the above-described problem, and an object of the invention is to provide a sheet supply system and a sheet supply method that can further enhance work efficiency. 
     To solve the above-described problem, the present inventors have conceived an idea of providing a transportation device that can move a roll and attaching the roll to the sheet supply device by this transportation device. However, during a period after the roll is carried in to a roll mounting section until the sheet supply device feeds the sheet continuously from the roll, it is necessary to perform predetermined pre-processing on the roll (hereinafter referred to as intermediate processing) for attaching the roll to the sheet supply device in a state where the sheet is continuously feedable. For example, it is necessary to perform processing such as processing for eliminating an adhesive tape that temporarily fixes a sheet end and a sheet positioned on an outermost periphery of the roll and having a stain or the like, and processing for changing a posture of the roll into a posture corresponding to a feeding direction such that the sheet supply device appropriately feeds the sheet from the roll. 
     Therefore, the present invention provides a sheet supply system for supplying a sheet from a roll including a tubular core member and the sheet wound around a periphery of the core member. The sheet supply system includes: a transportation device including: a body; an arm including a proximal section connected to the body and a distal section that is relatively displaceable with respect to the proximal section; and a transportation-side holder provided in the distal section of the arm, the transportation-side holder holding the roll; a roll mounting section on which the roll is mounted, the roll mounting section being disposed within a moving range (i.e., within a range of movement) of the transportation-side holder; a sheet supply device disposed within the moving range of the transportation-side holder, the sheet supply device including a roll supporter that supports the roll in a state where the sheet is continuously feedable; an intermediate processing device disposed within the moving range of the transportation-side holder, the intermediate processing device performing intermediate processing set in advance for the roll; and a controller configured to control the transportation device. The controller controls the transportation device to cause the transportation-side holder to hold the roll on the roll mounting section, and to convey the roll held by the transportation-side holder to the roll supporter of the sheet supply device through the intermediate processing device. 
     Also, the present invention provides a sheet supply method for causing a roll holder to hold a roll including a tubular core member and a sheet wound around a periphery of the core member, and supplying the sheet from the roll held by the roll holder, by using a transportation device including: a body; an arm including a proximal section connected to the body and a distal section that is relatively displaceable with respect to the proximal section; and a transportation-side holder provided in the distal section of the arm, the transportation-side holder holding the roll. The sheet supply method includes: a movement step of moving the transportation-side holder of the transportation device to a roll mounting section on which the roll is mounted; a roll acquisition step of causing the transportation-side holder of the transportation device to hold the roll mounted on the roll mounting section; an intermediate processing step of performing intermediate processing set in advance on the roll; and a setting step of causing the roll holder to hold the roll after the intermediate processing in a state where the sheet is continuously feedable. 
     The present invention can further enhance work efficiency. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG. 1  is a plan view schematically showing an overall configuration of a sheet supply system  1  according to the present embodiment. 
         FIG. 2  is a side view schematically showing the overall configuration of the sheet supply system  1 . 
         FIG. 3  is a schematic side view of a head viewed from one side of a direction orthogonal to a fourth axis. 
         FIG. 4  is a schematic side view of the head viewed from the other side of the direction orthogonal to the fourth axis. 
         FIG. 5  is a cross-sectional view of the line V-V of  FIG. 2 . 
         FIG. 6  is a schematic side view showing how a transportation-side holder holds a roll mounted on a roll mounting section. 
         FIG. 7  is a schematic side view showing how the roll is detached from the transportation-side holder. 
         FIG. 8  is a schematic side view showing how a core member is drawn from a supporting shaft. 
         FIG. 9  is a schematic side view showing how the core member is detached from the supporting shaft. 
         FIG. 10  is a schematic side view of an intermediate processing device. 
         FIG. 11  is a cross-sectional view of the line XI-XI of  FIG. 1 . 
         FIG. 12  is a diagram corresponding to  FIG. 11 , and is a diagram for describing a procedure for detecting a winding direction of the roll. 
         FIG. 13  is a cross-sectional view of the line XIII-XIII of  FIG. 12 . 
         FIG. 14  is a plan view showing a mounting stand. 
         FIG. 15  is a schematic side view showing how the roll is mounted on the mounting stand. 
         FIG. 16  is a schematic side view showing how the transportation-side holder re-holds the roll. 
         FIG. 17  is a cross-sectional view of the line XVII-XVII of  FIG. 10 . 
         FIG. 18  is a cross-sectional view of the line XVIII-XVIII of  FIG. 10 . 
         FIG. 19  is a block diagram showing input and output of the controller. 
         FIG. 20  is a flowchart showing an overall flow of processing to be performed by the sheet supply system. 
     
    
    
     DESCRIPTION OF EMBODIMENT 
     An embodiment of the present invention will be described below with reference to the accompanying drawings. Note that the following embodiment is an example of embodying the present invention, and does not limit the technical scope of the present invention. 
     (1) Overall System Configuration 
       FIG. 1  is a plan view schematically showing an overall configuration of a sheet supply system  1  according to the present embodiment.  FIG. 2  is a side view schematically showing the overall configuration of the sheet supply system  1 . 
     The sheet supply system  1  is a system for supplying a sheet  12  from a roll  10  including a tubular core member  1  and the sheet  12  wound around a periphery of the core member  11 . 
     The sheet supply system  1  includes a sheet supply device  2 , a roll mounting section  3 , a transportation device  4 , an intermediate processing device  5 , and a controller  100  (refer to  FIG. 19 ). 
     In the present embodiment, the sheet supply system  1  is used in a manufacturing system for manufacturing disposable diapers. This manufacturing system performs various types of processing on the sheet  12  supplied from the sheet supply system  1  to manufacture disposable diapers. 
     (2) Detailed Structure of Devices 
     Details of each device will be described. Hereinafter, a direction along a rail  40  to be described later of the transportation device  4 , that is, a vertical direction of  FIG. 1  is referred to as a front and rear direction, and up and down of  FIG. 1  are referred to as front and rear, respectively. 
     In addition, a right and left direction of  FIG. 1  is simply referred to as a right and left direction, and right and left of  FIG. 1  are simply referred to as right and left, respectively. 
     (2-1) Sheet Supply Device 
     The sheet supply device  2  includes one pair of supporting walls  21   a  and  21   a , a plurality of pairs of supporting shafts (roll supporters, roll holder)  22 , and a plurality of guide rolls  23 . 
     Each of the supporting walls  21   a  extends upward from a floor  90  and extends in the right and left direction, and stands side by side in parallel with each other along the front and rear direction. 
     Each of the supporting shafts  22  is a member for supporting the roll  10 . Each supporting shaft  22  has a generally cylindrical shape and supports the roll  10  by being inserted into the core member  11  of the roll  10 . Each supporting shaft  22  extends in a horizontal direction from the supporting walls  21   a  and  21   a . In the example shown in  FIG. 1  and  FIG. 2 , the back side supporting wall  21   a  is provided with four (two pairs of) supporting shafts  22  extending backward from the supporting wall  21   a , and the front side supporting wall  21   a  is provided with four (two pairs of) supporting shafts  22  extending forward from the supporting wall  21   a . In addition, each of an upper portion and a lower portion of each supporting wall  21   a  is provided with two (one pair of) supporting shafts  22  side by side on the right and left. 
     Each of the guide rolls  23  is for guiding the sheet  12  along a predetermined path. Each guide roll  23  also extends in the horizontal direction from the supporting walls  21   a  and  21   a.    
     The sheet  12  of the roll  10  supported by the supporting shaft  22  is fed from the roll  10  as a motor drives the supporting shaft  22  to rotate. This sheet  12  is conveyed along the path via each guide roll  23  by being received by a device of a downstream step (not shown). 
     Here, a rotation direction of the roll  10  when the sheet  12  is fed from the roll  10  supported by the supporting shaft  22  is determined in advance for each supporting shaft  22 . Each guide roll  23  is disposed such that the sheet  12  is appropriately fed to the downstream step along the path only by the roll  10  rotating in this determined rotation direction. 
     In the example shown in  FIG. 2 , when the roll  10  supported by the supporting shaft  22  provided on the left side rotates clockwise viewed from a tip side of the supporting shaft  22  as shown in a solid line arrow, the sheet  12  is fed appropriately from the roll  10 . Meanwhile, in the roll  10  supported by the supporting shaft  22  provided on the right side, when the roll  10  rotates counterclockwise viewed from the tip side of the supporting shaft  22  as shown in a broken line arrow, the sheet  12  is fed appropriately from the roll  10 . 
     Here, the disposable diaper is formed of a plurality of types of sheets with different materials and width, such as a nonwoven fabric, a film, and a tissue. Correspondingly, the sheet supply device  2  can feed each sheet continuously from a plurality of types of rolls with different materials, width, and outside diameters. That is, each pair of supporting shafts  22  different from each other of the sheet supply device  2  supports the rolls  10  with the types different from each other as necessary, and the plurality of types of sheets different from each other is fed from the rolls  10  toward the downstream step. However, inside diameters of the core members  11  of the rolls  10  are almost the same, and outside diameters of all the supporting shafts  22  of the sheet supply device  2  are set almost the same. 
     (2-2) Roll Mounting Section 
     The roll mounting section  3  is a section on which the roll  10  before use is mounted. In the present embodiment, part of the floor  90  functions as the roll mounting section  3 . In the example shown in  FIG. 1 , on an opposite side (right side) of the rail  40  from the sheet supply device  2 , one roll mounting section  3  is provided in each of front and rear of the intermediate processing device  5 . In the example shown in  FIG. 1 , the roll  10  with a small outside diameter is mounted on the front-side roll mounting section  3 , and the roll  10  with a large outside diameter is mounted on the rear-side roll mounting section  3 . 
     As shown in  FIG. 1  and  FIG. 2 , the rolls  10  are mounted on the roll mounting section  3  in a posture in which an axis of the core member  11  extends in the vertical direction. In the present embodiment, one or more rolls  10  are carried into the roll mounting section  3  in a state of being placed on a pallet  30 . Also, the rolls  10  are mounted on the roll mounting section  3  in the state of being placed on the pallet  30 . 
     (2-3) Transportation Device 
     As described above, the transportation device  4  includes the rail  40  that is positioned between the sheet supply device  2  and the roll mounting section  3  and extends in the front and rear direction, and an operation robot  41  moving on the rail  40 . The rail  40  includes a pair of rail members  40   a  and  40   a  aligned in parallel. 
     The operation robot  41  includes a running section (body)  42  sliding on the rail  40  and an arm  43  coupled with the running section  42 . 
     The running section  42  includes a built-in running motor  201  (refer to  FIG. 19 , and hereinafter referred to as a running motor). The running section  42 , and thus the operation robot  41  is driven by the running motor  201  to move on the rail  40 . 
     The arm  43  is a multi-jointed arm. The arm  43  includes a proximal section  43   a  connected to the running section  42 , and a head (distal section)  43   e  that is relatively displaceable with respect to the proximal section  43   a.    
     Specifically, as shown in  FIG. 2 , the proximal section  43   a  is connected to the running section  42  pivotably about a pivot axis J 0  extending in the vertical direction. The arm  43  includes a first arm  43   b  connected to the proximal section  43   a  pivotably about a first axis J 1  extending in the horizontal direction, a second arm  43   c  connected to the first arm  43   b  pivotably about a second axis J 2  extending in the horizontal direction, and a third arm  43   d  connected to the second arm  43   c  pivotably about a third axis J 3  extending in the horizontal direction. Then, the head  43   e  is connected to the third arm  43   d  pivotably about a fourth axis J 4  extending in a direction orthogonal to the third axis J 3 . 
     The proximal section  43   a , the arms  43   b ,  43   c , and  43   d , and the head  43   e  are driven by a plurality of motors provided in the operation robot  41 , and turn or pivot about the axes J 0  to J 4 , respectively. Hereinafter, the motors driving the proximal section  43   a , the arms  43   b ,  43   c , and  43   d , and the head  43   e  are together referred to as arm driving motors  202  (refer to  FIG. 19 ). 
     Components such as a transportation-side holder  44 , a pressure section  45 , a pusher (extruding unit)  46 , a core member detachment section  47 , and a head-side camera  48  are movably attached to the head  43   e  integrally with the head  43   e.    
     (i) Transportation-Side Holder 
       FIG. 3  and  FIG. 4  are schematic side views of the head  43   e  viewed from both sides of a direction orthogonal to the fourth axis J 4 . 
     The transportation-side holder  44  is for holding the roll  10 . 
     The transportation-side holder  44  includes a roll holding shaft  44   a  extending along the direction orthogonal to the fourth axis J 4  from an attachment surface (attached portion)  43   f  that is one side surface of the head  43   e  of the arm  43 , and a plurality of press-contact sections  44   b  (refer to  FIG. 5  and  FIG. 6 ). The transportation-side holder  44  is fixed to the attachment side surface  43   f  rotatably about the central axis J 5  of the roll holding shaft  44   a  and the transportation-side holder  44 . The transportation-side holder  44  is driven to rotate about the central axis J 5  by a hand section rotating motor  302  (refer to  FIG. 19 ). 
     The roll holding shaft  44   a  has a shape that enables insertion into the core member  11  of the roll  10 . An outside diameter of the roll holding shaft  44   a  is slightly smaller than an inside diameter of the core member  11 . 
     Specifically, the roll holding shaft  44   a  includes a proximal section rotatably fixed to the attachment side surface  43   f , and a distal section  44   a _ 2  that is an end of a longitudinal direction of the roll holding shaft  44   a . This distal section  44   a _ 2  is a free end. The roll holding shaft  44   a  is inserted into the core member  11  by the distal section  44   a _ 2 , which is the free end, being inserted into the core member  11 . That is, the roll  10  is attached to the roll holding shaft  44   a  from a distal section  44   a _ 2  side. Then, when the roll is pulled out from the roll holding shaft  44   a , the roll  10  is pulled out from the distal section  44   a _ 2  side. 
       FIG. 5  is a cross-sectional view of the line V-V of  FIG. 2 . As shown in  FIG. 5 , each press-contact section  44   b  is displaceable between a press-contact position that is a position shown in a solid line of  FIG. 5  and protrudes outward in a radial direction of the roll holding shaft  44   a  from a peripheral surface of the roll holding shaft  44   a , and a waiting position that is a position shown in a broken line of  FIG. 5  and retracts inward in the radial direction of the roll holding shaft  44   a  from the press-contact position. Each press-contact section  44   b  is press-contacted to an inner peripheral surface of the core member  11  in a state of being at the press-contact position. In a state of being at the waiting position, in the radial direction of the roll holding shaft  44   a , a position of the peripheral surface of the roll holding shaft  44   a  and a position of the peripheral surface of each press-contact section  44   b  are almost the same. 
     Each press-contact section  44   b  is driven by a press-contact section driving device  301  attached to the head  43   e  (refer to  FIG. 19 ). The press-contact section driving device  301  drives the press-contact sections  44   b  by a mechanical drive mechanism, air, or the like. 
     As shown in  FIG. 5  and  FIG. 2 , a plurality of holes is formed in the peripheral surface of the roll holding shaft  44   a . The press-contact section  44   b  is provided in each hole. Each press-contact section  44   b  is a plate-shaped member extending along an axial direction of the roll holding shaft  44   a . Each press-contact section  44   b  is displaceably disposed between the press-contact position and the waiting position at a plurality of positions in a direction along the axial direction of the roll holding shaft  44   a  and at a plurality of positions in the circumferential direction of the roll holding shaft  44   a . A protrusion is provided on an outside surface of each press-contact section  44   b . When the press-contact section  44   b  is displaced to the press-contact position, a tip of the protrusion will bite into the core member  11  of the roll  3 . 
     The transportation-side holder  44  configured in this way holds the roll  10 , by being inserted into the core member  11  of the roll  10  in a state where the press-contact sections  44   b  are at the waiting position, and subsequently the press-contact sections  44   b  moving to the press-contact position and press-contacting the inner peripheral surface of the core member  11 . 
     As shown in  FIG. 6 , in order to hold the roll  10  mounted on the roll mounting section  3 , the transportation-side holder  44  is disposed above the roll  10  in a state where the roll holding shaft  44   a  extends downward from the head  43   e . Then, as the transportation-side holder  44  falls from this state toward the roll  10 , the roll holding shaft  44   a  is inserted into the core member  11  of the roll  10 . Subsequently, the press-contact sections  44   b  are press-contacted to the inner peripheral surface of the core member  11 . 
     (ii) Pressure Section 
     The pressure section  45  is for restraining the sheet  12  on an outermost peripheral surface of the sheet  12  of the roll  10  held by the transportation-side holder  44  on a peripheral surface of the roll  10 . 
     Specifically, in the present embodiment, a tape T (refer to  FIG. 18 ) is affixed on the end of the sheet  12  on the outermost peripheral surface of each roll  10  carried in to the roll mounting section  3 . The end of the sheet  12  is restrained on the peripheral surface of the roll  10  by this tape T. Therefore, in order to feed the sheet  12  from the roll  10  in the sheet supply device  2 , it is necessary to detach this tape T. In contrast, as will be describe later, the present embodiment is configured such that the tape T is eliminated until the roll  10  is conveyed from the roll mounting section  3  to the sheet supply device  2 . Here, when the tape T is eliminated and the sheet  12  is no longer restrained on the roll  10  in this way, there is a fear that the end of the sheet  12  is turned over and moves to a position distant from the roll  10 . Therefore, in the present embodiment, the pressure section  45  is provided, and the pressure section  45  prevents the end of the sheet  12  from moving to a position separated from the roll  10 . 
     As shown in  FIG. 2  and  FIG. 3 , the pressure section  45  includes a support plate  45   a  coupled with one side surface of the head  43   e , and a generally cylindrical pressure section body  45   b  extending in parallel with an axis of the transportation-side holder  44  from a tip of the support plate  45   a . As shown in  FIG. 3 , the support plate  45   a  is coupled with the head  43   e  pivotably about the axis extending in parallel with the axis of the transportation-side holder  44  (central axis of the roll holding shaft  44   a ). The support plate  45   a  is driven to pivot by a pressure section driving device  303  (refer to  FIG. 19 ). As the support plate  45   a  is pivotally displaced, the pressure section body  45   b  moves toward and away from the transportation-side holder  44 . 
     In the pressure section  45  configured in this way, in a normal state, as shown in a solid line of  FIG. 3 , the pressure section body  45   b  is separated most from the transportation-side holder  44 . Meanwhile, when the sheet  12  on the outermost peripheral surface of the roll  10  is eliminated as described above, the support plate  45   a  is driven to pivot. Accordingly, as shown in a broken line of  FIG. 3 , the pressure section  45  is in a state where the pressure section body  45   b  abuts on an outside surface of the roll  10  from outside of the radial direction of the roll  10 . With this abutment, the pressure section  45  presses down, on the roll  10 , the end or its neighborhood of the sheet  12  on the outermost peripheral surface of the roll  10 , and restrains the end on the peripheral surface of the roll  10 . Note that the pressure section  45  preferably presses down the sheet  12  on the outermost peripheral surface over the whole area of the width direction. However, the pressure section  45  is required at least to be configured to prevent movement of the end of the sheet  12 . Therefore, the pressure section  45  may press down only part of the width direction of the sheet  12 . 
     Note that the pressure section driving device  303  drives the support plate  45   a  of the pressure section  45  by air or the like. 
     (iii) Pusher 
     The pusher  46  is for pushing out the roll  10  held by the transportation-side holder  44 , and detaching the roll  10  from the transportation-side holder  44 . 
     As shown in  FIG. 3 , the pusher  46  is an annular member surrounding the transportation-side holder  44 . An outside diameter of the pusher  46  is set greater than an outside diameter of the core member  11  of the roll  10 . The pusher  46  is slidably coupled with the head  43   e  by a slide mechanism  46   b  (refer to  FIG. 7 ) along the axial direction of the roll holding shaft  44   a . The pusher  46  is driven to slide by a pusher driving device  304  (refer to  FIG. 19 ). 
     The pusher driving device  304  moves the pusher  46 , between a position near the side surface (attachment side surface)  43   f  of the head  43   e  as shown in a broken line of  FIG. 7  and a position further outside the tip of the roll holding shaft  44   a  as shown in a solid line of  FIG. 7 . Through such movement, the pusher  46  pushes out the roll  10  held by the transportation-side holder  44  outside the tip of the transportation-side holder  44 , and detaches the roll  10  from the transportation-side holder  44 . 
     Here,  FIG. 7  is a diagram showing how the roll  10  held by the transportation-side holder  44  is delivered to the supporting shaft  22  of the sheet supply device  2 . As shown in this  FIG. 7 , during this delivery, first, the transportation-side holder  44  is disposed at a position where the tip of the transportation-side holder  44  faces the supporting shaft  22 , and the central axis J 5  of the transportation-side holder  44  mostly agrees with the central axis of the supporting shaft  22 . Then, the tip of the supporting shaft  22  is inserted into the core member  11  of the roll  10  of a portion protruding from the tip of the transportation-side holder  44 . Subsequently, as the roll  10  is pushed out to the tip side of the transportation-side holder  44  by the pusher  46 , the roll  10  is delivered to the supporting shaft  22 . Note that when the roll  10  is detached from the transportation-side holder  44 , the press-contact sections  44   b  are at the waiting position, and the pressure section body  45   b  is retracted to a position separated from the peripheral surface of the roll  10 . 
     Note that the pusher driving device  304  drives the pusher  46  by air or the like. 
     (iv) Core Member Detachment Section 
     The core member detachment section  47  is for detaching the core member  11  from the supporting shaft  22  of the sheet supply device  2 . That is, in the present embodiment, the operation robot  41  is also configured to detach the core member  11  of the used roll  10  supported by the supporting shaft  22  of the sheet supply device  2 . In the present embodiment, the use of the roll  10  is finished with the sheet  12  remaining in the core member  11 . Accordingly, the core member detachment section  47  detaches the core member  11  with the sheet  12  wound. 
     As shown in  FIG. 2 ,  FIG. 4 , and other figures, the core member detachment section  47  is provided on an opposite side surface of the head  43   e  of the arm  43  from the attachment side surface  43   f.    
     The core member detachment section  47  includes a substrate  47   a  extending from one side surface of the head  43   e  of the arm  43  in a direction orthogonal to the fourth axis J 4 , a claw  47   b  provided at a tip of the substrate  47   a  and extending from the substrate  47   a  in a direction orthogonal to a longitudinal direction of the substrate  47   a , and a pair of clamping sections  47   c  provided at a proximal end of the substrate  47   a.    
     In a state shown in  FIG. 4 , a notch  47   g  recessed downward (substrate  47   a  side) is formed at an upper edge of the claw  47   b.    
     The clamping sections  47   c  are for grasping the core member  11 . As shown in  FIG. 4 , the pair of clamping sections  47   c  and  47   c  is arranged along a width direction of the substrate  47   a . These clamping sections  47   c  and  47   c  are driven in a direction toward and away from each other, as shown in a solid line and a broken line of  FIG. 4 . 
     An operation when the core member detachment section  47  configured in this way detaches the used roll  10  from the supporting shaft  22  will be described with reference to  FIG. 8  and  FIG. 9 . 
     First, the core member detachment section  47  is disposed below the supporting shaft  22  in a state where the substrate  47   a  and the supporting shaft  22  extend in parallel, and the claw  47   b  extends upward from the substrate  47   a  (toward the supporting shaft  22 ). Next, the core member detachment section  47  is elevated such that a lower portion of the supporting shaft  22  enters the notch  47   g  of the claw  47   b . Next, as shown in a broken line of  FIG. 8 , the core member detachment section  47  is moved in a direction separated from the supporting wall  21   a , and is disposed at a position where the claw  47   b  abuts on the end of the core member  11  (end on a side of the supporting wall  21   a ). 
     Then, subsequently, the core member detachment section  47  is driven in a direction separated from the supporting wall  21   a  along the axial direction of the supporting shaft  22 , as shown in a solid line of  FIG. 8 . Accordingly, the claw  47   b  pulls out the core member  11  in a direction separated from the supporting wall  21   a . At this time, the core member detachment section  47  does not completely pull out the core member  11  from the supporting shaft  22 , and the supporting shaft  22  is inserted into part of the core member  11 . Note that in order to clarify the diagram,  FIG. 8  shows the supporting shaft  22  inserted into the core member  11  in a solid line. 
     Subsequently, as shown in a solid line of  FIG. 9 , the clamping sections  47   c  clamp the end of the pulled-out used roll  10 . Then, in this state, the core member detachment section  47  moves in a direction separated from the supporting shaft  22 . Accordingly, the used roll  10  is completely pulled out from the supporting shaft  22 . 
     More particularly, as shown in  FIG. 9 , the core member detachment section  47  is disposed such that the core member detachment section  47  extends downward from the head  43   e , and such that the used roll  10  enters between the clamping sections  47   c  and  47   c . Then, the clamping sections  47   c  and  47   c  are driven in a direction to approach each other, and the clamping sections  47   c  and  47   c  put the end of the used roll  10  therebetween. In this state, the core member detachment section  47  is moved in a direction separated from the supporting wall  21   a , and accordingly, the used roll  10  is pulled out from the supporting shaft  22 . 
     Note that a drive mechanism for the clamping sections  47   c  and  47   c  drives the clamping sections  47   c  and  47   c  by air or the like. Also, the used roll  10  held by the clamping sections  47   c  is conveyed to a disposing place (not shown) and disposed. 
     (v) Head-Side Camera 
     As shown in  FIG. 2 ,  FIG. 3 , and other figures, the head-side camera  48  is attached to the head  43   e . The head-side camera  48  is provided to mainly identify a position of the core member  11  of the roll  10  mounted on the roll mounting section  3 . Specifically, an image captured by the head-side camera  48  is sent to the controller  100 . Based on the image captured by the head-side camera  48 , the controller  100  detects a central position of the core member  11  of the roll  10  mounted on the roll mounting section  3 . 
     Thus, in the present embodiment, the bead-side camera  48  and the controller  100  function as a core position detection device that detects the position of the core member  11  of the roll  10  mounted on the roll mounting section  3 . Note that the controller  100  also detects a schematic size of the outside diameter of the roll  10  based on the captured image. In addition, based on the detected outside diameter size of the roll  10 , the controller  100  determines whether the roll  10  mounted on the roll mounting section  3  is a roll of a prescribed size. Also, as will be describes later, the controller  100  functions as part of the core position detection device, and the controller controls the running motor  201  and the arm driving motors  202 . 
     In the present embodiment, the detected central position of the core member  11  is used when the transportation-side holder  44  holds the roll  10  mounted on the roll mounting section  3 . Specifically, the posture and position of the roll holding shaft  44   a  are adjusted based on the detected central position of the core member  11  to allow the roll holding shaft  44   a  to be appropriately inserted into the core member  11  of the roll  10 . For example, the posture and position of the roll holding shaft  44   a  are adjusted such that the distal section  44   a _ 2  of the roll holding shaft  44   a  faces downward and the central position of the core member  11  is on the central axis J 5 . 
     Here, in the present embodiment, in order of conveying the roll  10 , priority has been determined for mounting places in the roll mounting section  3 . According to this priority, the head-side camera  48  first captures an overall image of the rolls  10  mounted on the roll mounting section  3 . Next, based on the captured image, the roll  10  mounted on a place where priority is the highest (to be conveyed at an earlier stage) is identified. Then, the head  43   e  is moved to a neighborhood of the identified roll  10  to be conveyed. Subsequently, the position of the core member  11  of the roll  10  to be conveyed is detected. Then, based on this position, the position of the transportation-side holder  44  is adjusted more minutely. 
     For example, when the rolls  10  are mounted in a plurality of stacks in the vertical direction on the roll mounting section  3 , higher priority is set as the roll  10  is positioned at a higher place. 
     The roll  10  is held by the transportation-side holder  44  by the following procedure. 
     First, the head  43   e  is disposed at a position equal to or higher than a predetermined height from the roll mounting section  3 , the position where the head-side camera  48  captures all the rolls  10  mounted on the roll mounting section  3 . Next, based on an image captured by the head-side camera  48 , the controller  100  calculates a separation distance between the head  43   e  and the roll  10  positioned at the highest place. For example, the distance is calculated from a size of the core member  11  of the roll  10  in the captured image. 
     Next, based on the distance, the head  43   e  is lowered to a position close to the roll  10  positioned at the highest place. In this state, the controller  100  detects the central position of the core member  11 I of the roll  10  again based on the image captured by the head-side camera  48 . Next, based on a detection result of the central position of the core member  11 , the posture of the roll holding shaft  44   a  is defined as the posture in which the distal section  44   a _ 2  faces downward. Also, the posture and position of the transportation-side holder  44  are adjusted such that the detected central position of the core member  11  is on the central axis J 5  of the transportation-side holder  44 . Subsequently, the roll holding shaft  44   a  and the transportation-side holder  44  are lowered toward the roll  10 , thereby inserting the roll holding shaft  44   a  into the core member  11  of the roll  10 . 
     Note that priority may be determined to order of conveying the roll  10  in the horizontal direction as well. For example, priority may be set according to a distance from the rail  40 . For example, the roll  10  disposed at a position closer to the rail  40  may be first conveyed sequentially. 
     (2-4) Intermediate Processing Device 
     The intermediate processing device  5  is a device for performing intermediate processing. The intermediate processing is processing to be performed during a period after the roll  10  is carried into the roll mounting section  3  until the roll  10  is set in the supporting shaft  22  of the sheet supply device  2 . Also, the intermediate processing is processing to be performed on the roll  10  such that the roll  10  enters a state where the sheet  12  can be fed continuously from the roll  10 . As this intermediate processing, the present embodiment performs processing for detecting a winding direction of the roll  10 , processing for causing the transportation-side holder  44  to re-hold the roll  10  (to be performed as necessary), and processing for eliminating the sheet  12  on the outermost peripheral surface of the roll  10 . Also, as the intermediate processing, the present embodiment also performs processing for detecting a radius of the roll  10 . 
       FIG. 10  is a schematic side view of the intermediate processing device  5 . The intermediate processing device  5  includes a winding direction detection device  51 , a mounting stand (re-hold mounting section)  58 , a sheet elimination device  60 , and a roll radius detection sensor  70  (roll radius detection device). 
     (i) Roll Radius Detection Sensor 
     The roll radius detection sensor  70  is a sensor for detecting the radius of the roll  10  held by the transportation-side holder  44 . In the present embodiment, as shown in  FIG. 11 , which is a cross-sectional view of the line XI-XI of  FIG. 1 , inside a light-shielding box  52  to be described later, the roll radius detection sensor  70  is attached to a rear wall  52   a  to be described later of the light-shielding box  52 . 
     The roll radius detection sensor  70  is a so-called distance sensor. In a state where a distance between the central axis of the roll  10  and the roll radius detection sensor  70  is a reference distance set in advance, the roll radius detection sensor  70  measures a distance from the roll radius detection sensor  70  to the peripheral surface of the roll  10 . This measurement result is sent to the controller  100 . The controller  100  detects the radius of the roll  10  based on this measurement result and the reference distance. 
     In the present embodiment, the radius of the roll  10  is detected while the roll  10  is held by the transportation-side holder  44 . 
     Specifically, as shown in  FIG. 11 , the transportation-side holder  44  is disposed such that the central axis J 5  of the transportation-side holder  44  extends in the front and rear direction, and that a right and left distance between the central axis J 5  and the roll radius detection sensor  70  is the reference distance. In this state, the roll radius detection sensor  70  measures the distance to the peripheral surface of the roll  10 . Subsequently, the controller  100  detects a value obtained by subtracting this measured distance from the reference distance as the radius of the roll  10 . 
     In the present embodiment, the radii of the roll  10  are detected at a plurality of positions in a circumferential direction of the roll  10 . The controller  100  defines an average of these radii as the radius of the roll  10 . 
     Specifically, the transportation-side holder  44  is driven to rotate about the central axis J 5 . Then, the roll radius detection sensor  70  measures the distance to the peripheral surface of the roll  10  at a plurality of timings when a rotation angle of the transportation-side holder  44  differs. Accordingly, the radii of the roll  10  are detected at the plurality of positions in the circumferential direction of the roll  10 . Then, an average of radius at the plurality of positions is calculated. 
     (ii) Winding Direction Detection Device 
     The winding direction detection device  51  and the mounting stand  58  are devices for causing the transportation-side holder  44  to hold the roll  10  in an appropriate direction. 
     Specifically, as described above, in the present embodiment, the roll  10  can enter the roll holding shaft  44   a  only from the distal section  44   a _ 2  side. Meanwhile, when the roll  10  is pulled out from the roll holding shaft  44   a , the roll  10  can be pulled out only from the distal section  44   a _ 2  side of the roll holding shaft  44   a . Therefore, the winding direction of the roll  10  is restricted in a state where the roll  10  is delivered from the transportation-side holder  44  to the supporting shaft  22  and the roll  10  is held by the supporting shaft  22 , as shown in  FIG. 7 . Specifically, the winding direction of the roll  10  in this state will be restricted to the winding direction of the roll  10  when the roll holding shaft  44   a  is inserted into the core member  11  of the roll  10 , that is, when the transportation-side holder  44  holds the roll  10 . 
     Meanwhile, as described above, in the sheet supply device  2 , the rotation direction of the roll  10  when the sheet  12  is fed from the roll  10  is determined for each supporting shaft  22 . Therefore, it is necessary to set the roll  10  in the supporting shaft  22  in accordance with the rotation direction of the supporting shaft  22 . 
     For example, in the example shown in  FIG. 2 , as described above, the roll  10  supported by the supporting shaft  22  positioned on the left side rotates clockwise viewed from the tip side of the supporting shaft  22  to feed the sheet  12 . Meanwhile, the roll  10  supported by the supporting shaft  22  positioned on the right side rotates counterclockwise viewed from the tip side of the supporting shaft  22  to feed the sheet  12 . Therefore, it is necessary to set, in the supporting shaft  22 , the roll  10  with the winding direction that matches the rotation direction of the supporting shaft  22 . 
     Therefore, when the winding direction of the roll  10  held by the transportation-side holder  44  does not correspond to the feeding direction of the sheet  12 , the transportation-side holder  44  needs to re-hold the roll  10  before the roll  10  is delivered from the transportation-side holder  44  to the supporting shaft  22 . For example, when the roll  10  needs to be set in the supporting shaft  22  such that the winding direction of the roll  10  viewed from the tip side of the supporting shaft  22  is clockwise, the transportation-side holder  44  needs to hold the roll  10  in a state where the winding direction viewed from the tip side of the roll holding shaft  44   a  is counterclockwise. 
     Therefore, in the present embodiment, the winding direction detection device  51  detects the winding direction of the roll  10 . Then, it is determined based on this detection result whether to re-hold the roll  10 . Specifically, when the detected winding direction of the roll  10  fails to correspond to the feeding direction of the sheet  12 , the insertion direction of the roll holding shaft  44   a  into the core member  11  is changed by using the mounting stand  58 , and the transportation-side holder  44  re-holds the roll  10 , as will be described later. 
       FIG. 12  is a diagram corresponding to  FIG. 11 .  FIG. 13  is a cross-sectional view of the line XIII-XIII of  FIG. 12 . 
     The winding direction detection device  51  includes the light-shielding box  52 , and a light  53  and a winding direction detection camera  54  provided inside the light-shielding box  52 . Note that the light-shielding box  52  shields disturbance light when the winding direction detection camera  54  captures an image. If a light quantity sufficient for the winding direction detection camera  54  to detect the winding direction can be obtained, the light-shielding box may be omitted. 
     The light-shielding box  52  is a box-shaped member having an opening to the left side (rail  40  side). Specifically, the light-shielding box  52  includes the rear wall  52   a  extending in the vertical direction and the front and rear direction, lateral walls  52   b  and  52   c  extending leftward from both edges of the front and rear direction of the rear wall  52   a , an upper wall  52   d  horizontally extending over upper edges of the lateral walls  52   b  and  52   c , and a lower wall  52   c  horizontally extending over lower edges of the lateral walls  52   b  and  52   c . Then, in the light-shielding box  52 , an opening  52   f  surrounded by left edges of the lateral walls  52   b  and  52   c , the upper wall  52   d , and the lower wall  52   e  is formed. 
     As shown in  FIG. 10  to  FIG. 13 , the opening  52   f  has a size that allows insertion of part of the peripheral surface of the roll  10  into the light-shielding box  52  from the opening  52   f . In a state where part of the peripheral surface of the roll  10  is inserted into the light-shielding box  52  from the opening  52   f , the winding direction of the roll  10  is detected. Also, in a state where the roll  10  is held by the transportation-side holder  44 , the winding direction of the roll  10  is detected. 
     Specifically, in a state where the roll holding shaft  44   a  has a posture extending in the front and rear direction, part of the circumferential direction of the peripheral surface of the roll  10  held by the transportation-side holder  44  is inserted into the light-shielding box  52  over the overall width direction of the sheet  12 . A size of the front and rear direction of the opening  52   f  is set as a value sufficiently larger than a size of the axial direction of the roll  10  having the maximum size of the axial direction (size of the width direction of the sheet  12 ) out of the rolls  10  to be used. 
     The light  53  is attached to a position near the opening  52   f  on the lower wall  52   e  of the light-shielding box  52 . The light  53  emits light upward, and illuminates the peripheral surface of the roll  10  inserted into the light-shielding box  52 . 
     The winding direction detection camera  54  is attached to a generally center of the vertical direction of the rear wall  52   a  of the light-shielding box  52 . The winding direction detection camera  54  captures an image of the peripheral surface of the roll  10  inserted into the light-shielding box  52  from the opening  52   f.    
     The image captured by the winding direction detection camera  54  is sent to the controller  100 . The controller  100  detects the winding direction of the roll  10  from the image captured by the winding direction detection camera  54 . Thus, in the present embodiment, the winding direction detection camera  54  and the controller  100  function as the winding direction detection device that detects the winding direction of the roll  10 . 
     Specifically, the controller  100  detects a shadow formed on the end of the sheet  12  positioned on the outermost peripheral surface of the roll  10 . The controller  100  detects the winding direction of the roll  10  with a direction of this shadow. That is, in a state where the peripheral surface of the roll  10  is inserted into the light-shielding box  52  and external light is controlled, when the peripheral surface of the roll  10  is irradiated with light from the light  53 , if the end of the sheet  12  goes upward from a lower place, a shadow extending along the winding direction of the roll  10  from this end is formed around the end of the sheet  12  positioned on the peripheral surface of the roll  10 . Meanwhile, when the end of the sheet  12  goes downward from an upper place, strong reflected light is reflected from this end. Therefore, the controller  100  detects the direction of the shadow or the reflected light from the image captured by the winding direction detection camera  54 , and determines the winding direction of the roll  10 . 
     Here, it is unknown at which position of the peripheral surface of the roll  10  the end of the sheet  12  is placed. 
     Therefore, the present embodiment detects the shadow and the direction of the shadow over the entire area of the circumferential direction of the peripheral surface of the roll  10 . Specifically, the transportation-side holder  44  is driven to rotate about its central axis J 5 , and an area captured by the winding direction detection camera  54  is changed sequentially. The transportation-side holder  44  makes one revolution. The controller  100  detects the direction of the shadow of the end of the sheet  12  and the reflected light from the image captured over the overall peripheral surface of the roll  10  in the circumferential direction. The controller  100  then determines the winding direction of the roll  10 . At this time, the position of the end of the sheet  12  in the peripheral surface of the roll  10  is also detected together. 
     (iii) Mounting Stand 
       FIG. 14  is a schematic plan view showing the mounting stand  58 . The mounting stand  58  is a plate-shaped member on which the roll  10  is mounted, and its upper surface is a mounting surface  58   c  extending horizontally on which the roll  10  can be mounted from above. As shown in  FIG. 1 , the mounting stand  58  is disposed at a position overlapping part of the light-shielding box  52  in plan view above the light-shielding box  52 . In the present embodiment, the overall mounting stand  58  overlaps the upper wall  52   d  of the light-shielding box  52 . 
     A groove section  58   a  is formed in the mounting stand  58 . The groove section  58   a  penetrates the mounting stand  58  in the vertical direction (first direction), and has an opening in the horizontal direction (second direction). In the example of the diagram, the groove section  58   a  has an opening on the rail  40  side (left side). Specifically, a notch  58   b  recessed rightward is formed in a generally central portion of the front and rear direction of the side surface on the rail  40  side of the mounting stand  58 . The central portion of the front and rear direction of the notch  58   b  communicates with the groove section  58   a.    
     An inside diameter of the groove section  58   a  (size of the front and rear direction) is set greater than an outside diameter of the transportation-side holder  44 . Accordingly, the transportation-side holder  44  can enter the groove section  58   a  from the left side and down side of the mounting stand  58 . The mounting stand  58  is supported by a lifting device  310  on the floor  90  in a vertically movable manner. 
     The procedure for re-holding the roll  10  by using this mounting stand  58  will be described with reference to  FIG. 14  to  FIG. 16 . 
     First, the roll  10  is lowered from above the mounting stand  58 , and the roll  10  is mounted on the mounting surface  58   c . Specifically, as shown in  FIG. 15 , the head  43   e  is disposed above the mounting stand  58 , and the transportation-side holder  44  is lowered toward the mounting stand  58  in a posture extending downward from the head  43   e . When the roll  10  is mounted on the mounting surface  58   c , the press-contact sections  44   b  are returned to the waiting position, and the transportation-side holder  44  is moved upward. The roll  10  is left on the mounting surface  58   c  by the influence of gravity, and accordingly, the transportation-side holder  44  is pulled out from the roll  10 . 
     Next, as shown in  FIG. 16 , the mounting stand  58  on which the roll  10  is mounted is moved upward. Next, the head  43   e  is disposed below the mounting stand  58  while the transportation-side holder  44  extends upward from the head  43   e . Next, the head  43   e  goes up, and the transportation-side holder  44  is inserted into a predetermined position within the groove section  58   a  and the core member  11  of the roll  10  from below the mounting stand  58 . Next, the press-contact sections  44   b  are moved to the press-contact position, press-contact the inner peripheral surface of the core member  11 , and the transportation-side holder  44  holds the roll  10 . Next, after the head  43   e  goes up slightly and raises the roll  10 , as shown in a broken line of  FIG. 16  and a solid line of  FIG. 14 , the transportation-side holder  44  moves leftward to the outside of the mounting stand  58  through the groove section  58   a  and the notch  58   b.    
     (iv) Sheet Elimination Device 
       FIG. 17  is a cross-sectional view of the line XVII-XVII of  FIG. 10 .  FIG. 18  is a cross-sectional view of the line XVIII-XVIII of  FIG. 10 . 
     The sheet elimination device  60  is a device for eliminating the sheet  12  on the outermost peripheral surface of the roll  10 . The sheet  12  positioned on the outermost periphery of the roll  10  may be dirty because of exposure to the outside. Therefore, the sheet elimination device  60  eliminates the sheet  12  of the outermost periphery. Also, in the present embodiment, the end of the sheet  12  positioned on the outermost peripheral surface of the roll  10  is fixed to the roll  10  by the tape T. The sheet elimination device  60  also eliminates the tape T by eliminating the sheet  12  of the outermost periphery. 
     The sheet elimination device  60  includes a first cutter (first cutting section)  61  for cutting the sheet  12 , a cutter supporter  62  for slidably supporting the first cutter  61 , a second cutter  64  (second cutting section) for cutting the sheet  12 , a drawing device  65 , a plurality of guide rolls  69 , and a supporting wall  63  supporting these sections. 
     The sheet elimination device  60  is disposed such that the first cutter  61  can slide in the right and left direction. The first cutter  61  cuts the sheet  12  by sliding while in contact with the sheet  12 . Meanwhile, the second cutter  64  includes cutting blades (not shown) sandwiching the sheet  12  vertically, and cuts the sheet  12  by compressing the sheet  12  between these cutting blades. The first cutter  61  and the second cutter  64  are driven by a cutter driving device  320  (refer to  FIG. 19 ). 
     The drawing device  65  is a device for drawing the end of the sheet  12  formed by cutting the sheet  12  by the first cutter  61 , and for disposing the sheet  12  along a drawing path L extending in a direction distant from the roll  10  in a radial direction of the roll  10 . The drawing device  65  is connected to a suction device (not shown), draws the end of the sheet  12  by sucking the sheet  12 , and disposes the sheet  12  to extend along the drawing path L. 
     Each guide roll  69  is for guiding the sheet  12  to the drawing device  65 . The sheet  12  is introduced between the guide roll  69  positioned above and the guide roll  69  positioned below, and is guided to the drawing device  65 . 
     In the present embodiment, the first cutter  61  cuts the sheet  12  while the roll  10  is supported by the transportation-side holder  44 . Accordingly, the roll  10  is carried into the sheet elimination device  60  while being held by the transportation-side holder  44 . 
     At this time, as shown in  FIG. 17 , the roll  10  is carried into the sheet elimination device  60  by the operation robot  41 , in a posture in which the core member  11  extends along the right and left direction in which the first cutter  61  slides and moves. Also, at this time, the position of the transportation-side holder  44  is adjusted to allow the first cutter  61  to abut on the sheet  12  of the outermost periphery of the roll  10 . Specifically, based on a touch sensor or the like (not shown) provided in the sheet elimination device  60 , the position of the transportation-side holder  44  is adjusted at a position where the first cutter  61  can abut on the sheet  12 . 
     After the transportation-side holder  44  is disposed in this way, the sheet  12  of the roll  10  is cut by the sheet elimination device  60  by the following procedure. 
     First, the first cutter  61  is driven to slide. Accordingly, the sheet  12  on the outermost peripheral surface of the roll  10  is cut at a predetermined position (first position) along the width direction. Note that the position of the circumferential direction of the roll at the predetermined position is adjusted by the transportation-side holder  44  rotating. Specifically, based on the position of the end of the sheet  12  detected by the winding direction detection device  51 , the transportation-side holder  44  is rotated such that the end of the sheet  12  comes to the predetermined position with respect to the first cutter  61 . 
     Next, the transportation-side holder  44  is driven to rotate, such that the end of the sheet  12  formed by being cut by the first cutter  61  (hereinafter appropriately referred to as cut end) comes to a position corresponding to the drawing device  65 . Accordingly, the cut end of the sheet  12  is drawn into the drawing device  65 , and the sheet  12  extends from the roll  10  along the drawing path L. 
     Subsequently, furthermore, the transportation-side holder  44  is driven to rotate in a direction to feed the sheet  12  (clockwise in  FIG. 18  in the example of  FIG. 18 ) such that the sheet  12  of a predetermined length from the cut end is drawn into the drawing device  65 . Specifically, the transportation-side holder  44  is driven to rotate such that the sheet  12  is drawn into the drawing device  65  until the second cutter  64  faces a portion distant from the end of the sheet  12  on which the tape T is affixed by a peripheral length or more of the roll  10 , the end being the original end of the sheet  12 . In the present embodiment, the sheet  12  is fed such that the second cutter  64  faces a portion separated from the cut end, that is, the first position by the peripheral length or more of the roll  10 . 
     Next, a portion of the sheet  12  facing the second cutter  64  is cut by the second cutter  64 . At this time, the second cutter  64  faces a position of the sheet  12  separated from the first position (second position) by the peripheral length or more of the roll  10  as described above, and the sheet  12  is cut at this second position. 
     This cutting will cut a portion of the sheet  12  from the first position to the second position separated by the peripheral length or more of the roll  10 , that is, a portion obtained by adding a portion of the sheet  12  from the original end to the first position to a portion from the first position to the second position. Accordingly, the original end of the sheet  12  is eliminated from the roll  10 . Also, the sheet  12  positioned on the outermost peripheral surface of the roll  10  and having a stain or the like is eliminated. 
     The cut sheet  12  is sucked out to the predetermined disposing place by the drawing device  65 . 
     Subsequently, the transportation-side holder  44  is driven to rotate in the direction to take up the sheet  12 . Accordingly, the new end of the sheet  12  formed by cutting at the second position is returned onto the peripheral surface of the roll  10 . 
     Here, in the present embodiment, the roll radius detection sensor  70  detects the radius of the roll  10  as described above. Therefore, as described above, after the sheet  12  is cut at the second position, when the end of the sheet  12  is returned to the roll  10 , the rotation angle of the transportation-side holder  44  and the roll  10  is controlled by using this detected radius. Specifically, the rotation angle of the transportation-side holder  44  is calculated by using the distance from the second cutter  64  to the outermost peripheral surface of the roll  10  (for example, this is calculated by subtracting the radius of the roll  10  from the distance between the drawing device  65  and the central axis of the transportation-side holder  44 ) and the radius of the roll  10 . In addition, the rotation angle of the transportation-side holder  44  necessary for moving the new end of the sheet  12  formed by the second cutter  64  to the outermost peripheral surface of the roll  10  is calculated. Then, the transportation-side holder  44  is rotated by this angle or more. Accordingly, the new end of the sheet  12  is more securely returned onto the outermost peripheral surface of the roll  10 . 
     (v) Controller 
       FIG. 19  is a block diagram showing input and output of the controller  100 . Signals from devices such as the head-side camera  48 , the winding direction detection camera  54 , and the roll radius detection sensor  70  are input into the controller  100 . Based on these input signals, the controller  100  controls the transportation device  4 , the light  53 , the lifting device  310 , and the cutter driving device  320 . In particular, the controller  100  controls the running motor  201 , the arm driving motors  202 , the press-contact section driving device  301 , the hand section rotating motor  302 , the pressure section driving device  303 , and the pusher driving device  304  provided in the operation robot  4 , thereby controlling the operation robot  41 . 
     Overall processing to be performed by the controller  100  will be described with reference to a flowchart of  FIG. 20 . 
     First, in step S 1 , the controller  100  controls the running motor  201  and the arm driving motors  202  to cause the operation robot  41  to detach the used roll  10  from the supporting shaft  22 . 
     Specifically, the controller  100  causes the sheet supply device  2  to move the operation robot  41 . Next, as described above, the controller  100  places the core member detachment section  47  below the supporting shaft  22 , and then raises the core member detachment section  47 , and subsequently, moves the core member detachment section  47  in a direction separated from the supporting wall  21   a . Accordingly, the controller  100  causes the claw  47   b  to abut on the end of the core member  11  of the used roll  10 . Next, the controller  100  causes the core member detachment section  47  to separate from the supporting wall  21   a , and causes the core member detachment section  47  to pull out part of the used roll  10  from the supporting shaft  22 . Subsequently, the controller  100  causes the clamping sections  47   c  to grasp the used roll  10 , and causes the core member detachment section  47  to pull out the roll  10  from the supporting shaft  22 . Then, the controller  100  causes the core member detachment section  47  to dispose the used roll  10  in the disposing place. 
     Next, in step S 2 , the controller  100  moves the operation robot  41  to the roll mounting section  3  (movement step). 
     Specifically, the controller  100  controls the running motor  201  to move the operation robot  41  to a position facing the roll mounting section  3 . 
     Next, in step S 3 , the controller  100  detects the position of the core member  11  of the roll  10 . Specifically, as described above, the controller  100  causes the head-side camera  48  to capture an image of the roll  10  mounted on the roll mounting section  3 . Also, the controller  100  detects the central position of the core member  11  of the roll  10  based on the captured image. As described above, in the present embodiment, first, after the overall image of the rolls  10  mounted on the roll mounting section  3  is captured, the high-priority roll  10  to be conveyed next is specified, and subsequently, the central position of the core member  11  of this roll  10  is detected. Furthermore, the controller  100  detects the schematic size of the outside diameter of the roll  10 , and confirms that the target roll  10  has the prescribed size. 
     Next, in step S 4 , the controller  100  controls the arm driving motors  202  and the press-contact section driving device  301  to cause the transportation-side holder  44  of the operation robot  41  to hold the roll  10  (roll acquisition step). 
     Specifically, as described above, the controller  100  causes the transportation-side holder  44  to enter the core member  11  of the roll  10  from above, and moves the press-contact sections  44   b  to the press-contact position to press-contact the inner peripheral surface of the core member  11 , thereby causing the transportation-side holder  44  to hold the roll  10 . At this time, as described above, the controller  100  causes the transportation-side holder  44  to enter the core member  11  while adjusting the position of the transportation-side holder  44  based on the image captured by the head-side camera  48 . When the roll  10  is held by the transportation-side holder  44  in this way, the controller  100  controls the arm driving motors  202  to promptly change the posture of the transportation-side holder  44  such that the central axis J 5  becomes horizontal. In this way, even if some trouble arises in the press-contact section driving device  301  and press-contact force of the press-contact sections  44   b  disappears, it is possible to prevent the roll  10  from falling out easily from the transportation-side holder  44 . 
     Next, in step S 5 , the controller  100  controls the running motor  201  to move the operation robot  41  to the intermediate processing device  5 . 
     Next, in step S 6 , the controller  100  controls the arm driving motors  202  and the hand section rotating motor  302  to detect the radius of the roll  10  (intermediate processing step). 
     Specifically, the controller  100  controls the arm driving motors  202  to dispose the transportation-side holder  44  such that as described above, the transportation-side holder  44  extends in the front and rear direction, and the distance between the central axis J 5  of the transportation-side holder  44  and the roll radius detection sensor  70  becomes the reference distance. Then, the controller  100  detects the radius of the roll  10  based on the distance between the roll radius detection sensor  70  and the peripheral surface of the roll  10  detected by the roll radius detection sensor  70 . Also, at this time, the controller  100  controls the hand section rotating motor  302  to rotate the transportation-side holder  44  and detect the radii at a plurality of positions of the circumferential direction of the roll  10 , and averages the radii to calculate the radius of the roll  10 . 
     Next, in step S 7 , the controller  100  detects the winding direction of the roll  10  (winding direction detection step, intermediate processing step). 
     Specifically, the controller  100  controls the arm driving motors  202  to cause the transportation-side holder  44  to have a posture in which the central axis J 5  extends in the front and rear direction. Also, the controller  100  inserts the roll  10  into the light-shielding box  52  from the opening  52   f , and disposes part of the peripheral surface of the roll  10  within the light-shielding box  52 . Next, the controller  100  controls the light  53  and the hand section rotating motor  302  to illuminate the peripheral surface of the roll  10  with the light  53  while rotating the transportation-side holder  44  about its central axis J 5 , and causes the winding direction detection camera  54  to capture an image of the peripheral surface of the roll  10 . Then, the controller  100  detects the winding direction of the roll  10  based on the captured image. Furthermore, based on the captured image, the controller  100  also detects the position of the end of the sheet  12  on the outermost peripheral surface of the roll  10 . 
     Next, in step S 8 , the controller  100  determines whether the detected winding direction is a direction corresponding to the feeding direction of the supporting shaft  22  to which the roll  10  held by the transportation-side holder  44  is expected to be conveyed. 
     When the determination of step S 8  is NO and the detected winding direction is not the feeding direction, the process proceeds to step S 20 . In steps S 20  to S 21 , the controller  100  controls the arm driving motors  202  and the press-contact section driving device  301  to perform a roll re-holding step of causing the operation robot  41  to re-hold the roll  10  (intermediate processing step). 
     Specifically, in step S 20 , the controller  100  performs a roll mounting step of mounting the roll  10  on the mounting surface  58   c  of the mounting stand  58 . 
     Next, in step S 21 , the controller  100  performs a pulling-out step of pulling out the transportation-side holder  44  from the roll  10 . 
     Next, in step S 22 , the controller  100  performs a roll re-holding step of raising the mounting stand  58 , inserting the transportation-side holder  44  again from below into the groove section  58   a  of the mounting stand  58  to hold the roll  10 . Then, the controller  100  moves the transportation-side holder  44  to the outside of the mounting stand  58  through the notch  58   b . Note that when this re-holding process is finished, the controller  100  lowers the mounting stand  58 . 
     After step S 20 , the process proceeds to step S 10 . 
     On the other hand, when the determination of step S 8  is YES and the detected winding direction is a direction corresponding to the feeding direction of the supporting shaft  22 , the process proceeds to step S 10 . That is, in the present embodiment, when the winding direction of the roll  10  held by the transportation-side holder  44  is a direction corresponding to the feeding direction, the process proceeds to step S 10 , without performing steps S 20  to S 22  (without mounting the roll  10  on the mounting stand  58 ). 
     In step S 10 , the controller  100  controls the running motor  201  and the like to move the roll  10  to the sheet elimination device  60 . 
     Also, in step S 10 , the controller  100  controls the arm driving motors  202  and the cutter driving device  320  to eliminate the sheet  12  on the outermost peripheral surface of the roll  10  (sheet elimination step, intermediate processing step). 
     Specifically, as described above, the controller  100  disposes the roll  10  at a position where the first cutter  61  can abut on the sheet  12  on the peripheral surface of the roll  10 . The controller  100  causes the first cutter  61  to cut the sheet  12  on the outermost peripheral surface of the roll  10  at the predetermined position (first position). Subsequently, the controller  100  rotates the transportation-side holder  44  and the roll  10  to feed the sheet  12  on the upstream side of the feeding direction from the first position where first cut is performed from the roll  10  along the drawing path L, and causes the sheet  12  to be drawn into the drawing device  65 . Next, the controller  100  causes the second cutter  64  to cut the sheet  12  at the position distant from the first position by one peripheral length or more of the roll  10  (second position). Subsequently, the controller  100  rewinds the fed sheet  12 , and disposes the new end formed at the second position at a predetermined position on the outermost peripheral surface of the roll  10 . 
     Next, in step S 11 , the controller  100  controls the pressure section driving device  303  to cause the pressure section  45  to restrain, on the roll  10 , the end of the sheet  12  on the peripheral surface of the roll  10  (new end formed in step  10 ) or its neighborhood. Specifically, after the sheet  12  is cut in step S 10 , when the roll  10  moves to the outside of the supporting wall  63 , the controller  100  drives the pressure section  45  immediately. Then, as described above, the controller  100  causes the pressure section body  45   b  to abut on the roll  10  from the outside of the radial direction of the roll  10 , presses the end of the sheet  12  on the peripheral surface of the roll  10  or its neighborhood on the roll  10 , and restrains the end or its neighborhood on the peripheral surface of the roll  10 . 
     Next, in step S 12 , the controller  100  controls the running motor  201  and the like to move the roll  10  to the sheet supply device  2 . 
     Subsequently, in step S 13 , the controller  100  controls the arm driving motors  202 , the press-contact section driving device  301 , the pressure section driving device  303 , and the pusher driving device  304  to set the roll  10  held by the transportation-side holder  44  in the supporting shaft  22  (setting step). 
     Specifically, as described above, the controller  100  disposes the transportation-side holder  44  to face the supporting shaft  22 . The controller  100  inserts the tip of the supporting shaft  22  into a portion of the core member  11  of the roll  10  protruding from the tip of the transportation-side holder  44 . Then, after setting the press-contact sections  44   b  at the waiting position and separating the pressure section body  45   b  from the peripheral surface of the roll  10 , the controller  100  pushes out the roll  10  from the transportation-side holder  44  to the supporting shaft  22  side with the pusher  46 . Accordingly, the supporting shaft  22  is inserted into the core member  11  of the roll  10 , and the roll  10  is set at the predetermined position of the supporting shaft  22 . 
     (3) Effects and the Like 
     As described above, in the sheet supply system  1  according to the present embodiment, all of the roll mounting section  3  on which the roll  10  is mounted, the intermediate processing device  5  for performing intermediate processing on the roll  10 , and the sheet supply device  2  for feeding the sheet  12  continuously are disposed in a moving range of the transportation-side holder  44 . Then, the controller  100  controls the operation robot  41  such that after the transportation-side holder  44  holds the roll  10  on the roll mounting section  3 , the roll  10  moves to the sheet supply device  2  through the intermediate processing device  5 . 
     Therefore, the roll  10  mounted on the roll mounting section  3  can be automatically supplied to the sheet supply device  2 , and the intermediate processing device  5  can perform each intermediate processing on the roll  10 . Therefore, a worker does not need to perform work for conveying the roll  10  mounted on the roll mounting section  3  to the sheet supply device  2  and setting the roll  10  in the supporting shaft  22 , and the intermediate processing, making it possible to enhance work efficiency. In addition, the roll  10  can be set in the sheet supply device  2  in a state where the sheet  12  is continuously feedable. 
     Furthermore, the overall configuration of the device can be simplified. That is, in this sheet supply system  1 , all the rolls  10  mounted on the roll mounting section  3  are conveyed to the supporting shafts  22  through the common intermediate processing device  5 , regardless of which supporting shaft  22  each roll  10  is conveyed to. Therefore, it is not necessary to individually provide a device for performing intermediate processing on the roll  10  for each supporting shaft  22 , and the intermediate processing device  5  can be used in common to the plurality of rolls  10 . Therefore, the device can be simplified. 
     Also, this sheet supply system  1  causes the transportation-side holder  44  to hold the roll  10  by inserting the transportation-side holder  44  into the core member  11 . Therefore, compared with a case where the roll is held by grasping the peripheral surface of the roll or the like, this sheet supply system  1  can hold the roll in a state where deformation of the roll is inhibited. In particular, a sheet of a relatively soft material, such as a nonwoven fabric and a tissue, is used for a disposable diaper, as described above. Therefore, if the peripheral surface of the roll formed of this sheet is grasped, the roll will be deformed. In contrast, the present embodiment causes the transportation-side holder  44  to hold the roll  10  by inserting the transportation-side holder  44  into the core member  11 , making it possible to convey the roll  10  while inhibiting deformation the roll  10 . 
     Also, this sheet supply system  1  provides the head  43   e  with the head-side camera  48 , and detects the position of the core member  1   i  mounted on the roll mounting section  3  based on the image captured by the head-side camera  48 . Then, based on this detection result, the position of the transportation-side holder  44  is adjusted. Therefore, the transportation-side holder  44  can be more appropriately inserted into the core member  11  mounted on the roll mounting section  3 . 
     Here, with the configuration of causing the transportation-side holder  44  to hold the roll  10  by inserting the transportation-side holder  44  into the core member  11  in this way, the roll  10  can be conveyed while deformation of the roll  10  is inhibited. 
     However, in this configuration, since the roll  10  is inserted and removed only from the distal section  44   a _ 2  side of the transportation-side holder  44 , as described above, the winding direction of the roll  10  when the roll  10  is delivered from the transportation-side holder  44  to the supporting shaft  22  is controlled. Specifically, the winding direction of the roll  10  during this delivery will be controlled by the winding direction when the transportation-side holder holds the roll  10 , furthermore, by the direction of the roll  10  mounted on the roll mounting section  3 . 
     In contrast, in this sheet supply system  1 , the mounting stand  58  is provided in the intermediate processing device  5 , allowing the transportation-side holder  44  to re-hold the roll  10  during conveyance of the roll  10 . This makes it possible to supply the roll  10  to the sheet supply device  2  in a state where the winding direction of the roll  10  becomes appropriate. Also, this eliminates the need for changing the posture of the roll  10  such that the winding direction of the roll  10  becomes an appropriate direction on the roll mounting section  3 , or changing the posture of the roll  10  after the roll  10  is delivered to the supporting shaft  22 . This makes it possible to omit work for adjusting or changing the posture of the roll  10 , further enhancing work efficiency. 
     In particular, the embodiment can implement re-holding of the roll  10  with the simple configuration of forming the groove section  58   a  configured as described above in the mounting stand  58 . 
     Also, in the embodiment, the roll  10  is mounted on the mounting surface  58   c  of the mounting stand  58  in the posture in which the axis of the roll  10  extends in the vertical direction. Therefore, it is possible to inhibit deformation of the peripheral surface of the roll  10  better than when the roll  10  is mounted on the mounting stand  58  in the posture in which the axis of the roll extends in the horizontal direction or the like and the peripheral surface of the roll abuts on the mounting stand  58 . In particular, in this embodiment, a relatively soft material such as a nonwoven fabric and a tissue is used as the sheet of the roll  10 , and the roll  10  is deformed easily. 
     Therefore, the configuration of the embodiment described above can inhibit deformation of the roll  10  effectively. 
     Also, this sheet supply system  1  is provided with the winding direction detection device  51  to detect the winding direction of the roll  10  held by the transportation-side holder  44 . Then, the roll  10  is mounted on the mounting stand  58  only when this winding direction does not correspond to the feeding direction. 
     Therefore, the roll  10  can be supplied to the sheet supply device  2  in a state where the winding direction of the roll  10  is set at an appropriate direction more certainly. 
     Furthermore, the winding direction of the roll  10  is detected in a state where the roll  10  is held by the transportation-side holder  44 . Therefore, it is not necessary to provide a separate device for holding the roll  10  when detecting the winding direction of the roll  10 , simplifying the device. In addition, it is possible to convey the roll efficiently by omitting delivery of the roll between this device for holding the roll and the transportation-side holder  44 . 
     Also, in this sheet supply system  1 , the sheet elimination device  60  is provided in the intermediate processing device  5 , and the sheet elimination device  60  performs the sheet elimination step of eliminating the sheet  12  on the outermost peripheral surface of the roll  10 . This allows efficient elimination of the sheet  12  positioned on the outermost periphery of the roll  10  and having a stain, and the tape T for fastening the end of the sheet  12 . This will implement supply, to the sheet supply device  2 , of the roll  10  in an appropriate state where the sheet  12  having a stain is not included, while enhancing work efficiency. 
     In particular, this sheet supply system  1  eliminates the sheet  12  in a state where the roll  10  is held by the transportation-side holder  44 . Therefore, it is not necessary to provide a separate device for holding the roll  10  when eliminating the sheet  12 . This will simplify the device. In addition, it is possible to convey the roll efficiently by omitting delivery of the roll between this device for holding the roll and the transportation-side holder  44 . 
     Also, in this sheet supply system  1 , during implementation of this elimination processing of the sheet  12 , based on the detected radius of the roll  10  and the length of the sheet  12  pulled out from the roll  10  to the second cutter  64 , that is, based on the distance between the outermost peripheral surface of the roll  10  and the second cutter  64 , the rotation angle of the transportation-side holder  44  at the time of rewinding the sheet  12  to the roll  10  is set. Therefore, this makes it possible to dispose more securely the new end of the sheet  12  formed by the second cutter  64  at the predetermined position on the outermost peripheral surface of the roll  10 . 
     Also, in this sheet supply system  1 , the operation robot  41  can move on the rail  40 . This makes it possible to increase the moving range of the transportation-side holder  44  and to convey the roll  10  in a wider range, without enlarging the operation robot  41 . 
     (4) Modification 
     The embodiment has described a case where the operation robot  41  moved on the rail  40 , but the rail  40  may be omitted. 
     Also, the embodiment has described a case where the sheet elimination device  60  eliminates the sheet  12  in a range between the first position of the sheet  12  on the outermost peripheral surface of the roll  10 , and the second position of the sheet  12  that is distant from the first position by the peripheral length of the roll  10 . However, the range of the sheet to eliminate is required at least to be equal to or greater than the peripheral length of the roll  10  from the first position, and is not limited to the peripheral length. 
     Also, the embodiment has described a case where after the first cutter  61  cuts the first position of the sheet  12 , the sheet  12  is fed from the roll  10  along the drawing path L by using the drawing device  65 , and after the second cutter  64  cuts the second position in the middle of the fed sheet  12 , the fed sheet  12  is rewound to the roll  10 . However, after one cutter  61  cuts the first position of the sheet  12 , the roll  10  may be rotated and the same cutter  61  may face and cut the second position. Furthermore, by cutting two sheets simultaneously, one cutter may simultaneously cut the first position of the sheet  12  on the outermost peripheral surface and the second position of the sheet  12  on the inner side. 
     Also, the embodiment has described a case where the end of the sheet  12  positioned on the outermost peripheral surface of the roll  10  is irradiated with light, and the winding direction of the roll  10  is detected with the direction of the shadow that arises in the surroundings or the reflected light. However, specific procedures for detecting the winding direction of the roll  10  are not limited to this procedure. 
     Also, the embodiment has described a case where the sheet  12  on the outermost peripheral surface of the roll  10  is restrained on the peripheral surface of the roll  10  by the tape T. However, the specific configuration for restraining the sheet  12  on the outermost peripheral surface is not limited to this configuration. For example, the end of the sheet  12  may be fixed to the sheet  12  of the inner side with an adhesive. 
     Also, the embodiment has described a case of including the winding direction detection device  51 . However, it is required at least to determine whether the winding direction of the roll  10  acquired in the roll mounting section  3  is a direction corresponding to the feeding direction of the roll  10  held by the supporter  22  of the sheet supply device  2 . Therefore, the embodiment is not necessary required to include the winding direction detection device  51 . For example, when all the rolls  10  are aligned in the same winding direction on the roll mounting section  3 , it is possible to easily determine whether the winding direction of the roll  10  agrees with the required winding direction. Therefore, in this case, the embodiment is not required to include the winding direction detection device  51 . 
     Also, the embodiment performs intermediate processing in a state where the roll  10  is held by the transportation-side holder  44 . However, the roll  10  may be transferred to a supporting portion of a supporting device provided separately, and intermediate processing may be performed. 
     Also, the embodiment has described a case where the roll  10  is mounted on the roll mounting section  3  in the posture in which the axis of the core member  11  extends in the vertical direction. However, the roll  10  mounted on the roll mounting section  3  may have a posture in which the axis of the core member  11  extends in the horizontal direction or other directions. 
     Also, the embodiment has described a case where the roll  10  is mounted on the mounting stand  58  in a posture in which the axis of the roll  10  extends in the vertical direction. However, the posture when the roll  10  is mounted on the mounting stand  58  is not limited to this posture. For example, the roll  10  may be mounted on the mounting stand  58  in a posture in which the axis extends in the horizontal direction. In this case, furthermore, the mounting stand  58  may be rotated about an axis extending in the vertical direction. In this way, after the transportation-side holder  44  is pulled out from a first side of the axial direction of the core member  11  of the roll  10 , by rotating the mounting stand  58 , the transportation-side holder  44  can be inserted into the core member  11  of the roll  10  from a second side of the axial direction, without moving the transportation-side holder  44  to the second side of the axial direction of the roll  10 , and the moving range of the transportation-side holder  44  can be kept small. 
     Note that the above-described specific embodiment mainly includes the invention having the following configurations. 
     That is, the present invention provides a sheet supply system for supplying a sheet from a roll including a tubular core member and the sheet wound around a periphery of the core member. The sheet supply system includes: a transportation device including: a body; an arm including a proximal section connected to the body and a distal section that is relatively displaceable with respect to the proximal section; and a transportation-side holder provided in the distal section of the arm, the transportation-side holder holding the roll; a roll mounting section on which the roll is mounted, the roll mounting section being disposed within a moving range of the transportation-side holder; a sheet supply device disposed within the moving range of the transportation-side holder, the sheet supply device including a roll supporter that supports the roll in a state where the sheet is continuously feedable; an intermediate processing device disposed within the moving range of the transportation-side holder, the intermediate processing device performing intermediate processing set in advance for the roll; and a controller configured to control the transportation device. The controller controls the transportation device to cause the transportation-side holder to hold the roll on the roll mounting section, and to convey the roll held by the transportation-side holder to the roll supporter of the sheet supply device through the intermediate processing device. 
     In this invention, the transportation device can automatically supply the roll mounted on the roll mounting section to the sheet supply device, and the intermediate processing device can perform the intermediate processing on the roll. Therefore, a worker does not need to perform work for conveying and setting the roll mounted on the roll mounting section to the sheet supply device, and work related to the intermediate processing. Therefore, work efficiency can be enhanced. 
     Moreover, the roll is conveyed to the intermediate processing device during movement from the roll mounting section to the sheet supply device. Therefore, the roll can be more securely set in the roll supporter of the sheet supply device in a state where the sheet is continuously feedable. 
     Also, for example, when the sheet supply device includes a plurality of roll supporters, the intermediate processing needs to be performed on each of the plurality of rolls held by each roll supporter. In contrast, in the present invention, the intermediate processing is performed on the roll while the roll is conveyed to the sheet supply device. Therefore, the intermediate processing can be performed on each roll by using the common intermediate processing device, and the overall configuration of the device can be simplified. 
     Also, in the configuration described above, preferably, the distal section of the arm includes an attached portion to which the transportation-side holder is attached, the transportation-side holder includes a roll holding shaft extending from the attached portion, the roll holding shaft holds the roll in a state of being inserted into the core member of the roll, and the controller controls the transportation device in such a manner that the roll holding shaft is inserted into the core member of the roll on the roll mounting section. 
     With this configuration, compared with a case where the roll is held by grasping the peripheral surface of the roll or the like, the roll can be held in a state where deformation of the roll is inhibited. Also, even in a case where the outside diameters of the rolls differ from each other, when the inside diameters of the core members are generally the same, the common transportation-side holder can hold these rolls. Therefore, corresponding to a plurality of rolls with different outside diameters, it is not necessary to provide a plurality of devices for holding these rolls, and the device can be simplified. 
     In the configuration described above, preferably, the transportation device includes a core position detection device, the core position detection device detecting a position of the core member of the roll mounted on the roll mounting section, and the controller controls the transportation device based on the position of the core member detected by the core position detection device in such a manner that a position of the roll holding shaft on the roll mounting section is a position that allows the roll holding shaft to hold the roll. 
     With this configuration, the transportation-side holder can be more appropriately inserted into the core member. Moreover, the transportation device includes the core position detection device. Therefore, for example, when a plurality of roll mounting sections is provided, each roll mounting section does not need to include the core position detection device, and the device can be simplified. 
     In the configuration described above, preferably, the roll holding shaft includes a proximal section supported by the attached portion, and a distal section to be inserted into the core member of the roll, the intermediate processing device includes a re-hold mounting section, the re-hold mounting section having a shape that allows the roll to be mounted in a state where both ends of an axial direction of the core member of the roll are open in order to change an insertion direction of the roll holding shaft into the core member of the roll, and the controller controls the transportation device in such a manner that the roll with the roll holding shaft inserted into the core member is mounted on the re-hold mounting section, the roll holding shaft is pulled out from the core member of the roll mounted on the re-hold mounting section to one side of the axial direction of the core member, and the roll holding shaft pulled out from the core member is inserted into the core member of the roll from the other side of the axial direction of the core member. 
     With this configuration, with the simple configuration of mounting the roll on the re-hold mounting section and changing the insertion direction of the transportation-side holder into the mounted roll, the winding direction of the roll supported by the transportation-side holder can be changed as necessary during conveyance of the roll. Here, in the sheet supply device, the feeding direction of the sheet for feeding the sheet appropriately, that is, the winding direction of the roll has usually been determined. In contrast, with the configuration described above, the winding direction of the roll supported by the transportation-side holder can be changed during conveyance of the roll. Therefore, the roll can be supplied to the sheet supply device in a state where the winding direction is an appropriate direction. Also, on the roll mounting section or the like, it is possible to omit work for disposing the roll in advance such that the winding direction corresponds to the predetermined direction, and work for selecting the roll of the specified winding direction, further enhancing work efficiency. 
     In the configuration described above, preferably, the re-hold mounting section includes a groove section, the groove section penetrating the re-hold mounting section in a first direction and having a shape open in a second direction orthogonal to the first direction to allow the roll holding shaft to be inserted along the first direction and to allow the roll holding shaft to move along the second direction, and the controller controls the transportation device in such a manner that the roll is mounted on the re-hold mounting section at a position at which an inside portion of the core member overlaps with the groove section when viewed along the first direction, the roll holding shaft is pulled out from the core member of the roll to one side of the first direction, the roll holding shaft is inserted into the core member of the roll from the other side of the first direction, and then the roll holding shaft is moved in the second direction. 
     With this configuration, with the simple configuration of providing the groove section that allows movement of the roll holding shaft in the re-hold mounting section, the insertion direction of the roll holding shaft into the core member can be changed. 
     In the configuration described above, preferably, the re-hold mounting section includes a mounting surface on which the core member of the roll is mounted in a posture of extending in the first direction, and the first direction is set as a vertical direction, and the second direction is set as a horizontal direction. 
     With this configuration, the roll can be mounted on the mounting surface of the re-hold mounting section in the posture in which the axis of the roll extends in the vertical direction, and the insertion direction of the transportation-side holder can be changed in this posture. For example, in a case where a material of the sheet is a soft material such as a nonwoven fabric used for absorptive articles such as a disposable diaper, when the roll is mounted in a posture in which the axis of the roll extends in the horizontal direction, there is a fear that the peripheral surface of the roll may be deformed. In contrast, with the configuration described above, since the side surface of the roll is mounted on the mounting surface, the deformation of the peripheral surface of the roll can be inhibited. 
     In the configuration described above, preferably, the intermediate processing device includes a winding direction detection device, the winding direction detection device configured to detect a winding direction of the roll, and the controller controls the transportation device in such a manner that when the winding direction of the roll detected by the winding direction detection device is not a direction set in advance, after the roll is mounted on the re-hold mounting section and the roll holding shaft is pulled out from the core member of the roll from one side of the axial direction of the core member, the roll holding shaft is inserted from the other side of the axial direction of the core member. 
     With this configuration, the roll can be delivered to the sheet supply device in a state where the winding direction of the roll becomes more securely an appropriate direction set in advance. For example, even when the winding direction of the roll mounted on the roll mounting section is random or the plurality of roll supporters of the sheet supply device supports the rolls in different winding directions, check of the winding direction by a person can be omitted. 
     In the configuration described above, preferably, the roll holding shaft includes a proximal section fixed to the attached portion, and a distal section to be inserted into the core member of the roll, the intermediate processing device includes a winding direction detection device, the winding direction detection device configured to detect a winding direction of the roll, and the controller controls the transportation device in such a manner that when the winding direction of the roll detected by the winding direction detection device is a direction set in advance, the roll is conveyed to the sheet supply device. 
     With this configuration, the roll can be more securely set in the roll supporter in a state where the winding direction is appropriate. Specifically, in the sheet supply device, the feeding direction of the sheet for feeding the sheet appropriately, that is, the winding direction of the roll has usually been determined. Therefore, with the configuration described above, the roll with the winding direction corresponding to the feeding direction of the sheet can be more securely set in the roll supporter. Also, on the roll mounting section, it is possible to omit work for disposing the roll in advance such that the winding direction corresponds to the predetermined direction, and work for selecting the roll of the specified winding direction, further enhancing work efficiency. 
     In the configuration described above, preferably, the winding direction detection device detects the winding direction of the roll in a state where the transportation-side holder holds the roll. 
     With this configuration, it is not necessary to provide a separate device for holding the roll when detecting the winding direction of the roll. Therefore, the device can be simplified, and it is possible to convey the roll efficiently by omitting delivery of the roll between this device for holding the roll and the roll holding shaft. 
     In the configuration described above, preferably, the intermediate processing device includes a sheet elimination device, the sheet elimination device eliminates, out of the sheet of the roll, a portion between an end on an outermost peripheral surface of the roll and a first position of the sheet on the outermost peripheral surface, and a portion between the first position and a second position of the sheet distant from the end on the outermost peripheral surface by a peripheral length or more of the roll. 
     With this configuration, the sheet positioned on the outermost periphery of the roll and having a stain is automatically eliminated during conveyance of the roll. Therefore, this makes it possible to supply the sheet supply device with the appropriate roll that does not include the sheet having a stain, while enhancing work efficiency. Also, when the end of the sheet is fixed with a tape or the like, this tape can also be eliminated automatically. 
     In the configuration described above, preferably, the intermediate processing device includes a roll radius detection device, the roll radius detection device configured to detect a radius of the roll, the sheet elimination device includes a first cutting section for cutting the sheet at the first position, a drawing device for drawing the end of the sheet formed by the first cutting section to dispose the sheet along a drawing path extending in a direction distant from the roll in a radial direction of the roll, and a second cutting section provided on the drawing path, the second cutting section cutting the second position of the sheet in a state where the end of the sheet is drawn by the drawing device, the transportation-side holder is provided in the distal section of the arm in a state where the roll held by the transportation-side holder is rotatable about a center line of the core member, the controller rotates the transportation-side holder in a direction in which the sheet is fed from the roll in such a manner that the second position of the sheet is face the second cutting section after the first cutting section cuts the sheet, the controller rotates the transportation-side holder in a direction in which the sheet is rewound into the roll in such a manner that the end of the sheet formed by the second cutting section is disposed on a peripheral surface of the roll after the second cutting section cuts the sheet, and the controller controls a rotation angle of the transportation-side holder in rewinding the sheet to the roll based on the radius of the roll detected by the roll radius detection device. 
     With this configuration, after the second cutting section cuts the sheet at the second position, it is possible to more securely return to a state where the sheet is wound around the roll. 
     In the configuration described above, preferably, the sheet elimination device eliminates the sheet of the roll in a state where the roll is held by the transportation-side holder. 
     With this configuration, it is not necessary to provide a separate device for holding the roll when eliminating the sheet, and the device can be simplified. Also, it is possible to convey the roll efficiently by omitting delivery of the roll between this device for holding the roll and the roll holding shaft. 
     Also, the present invention provides a sheet supply method for causing a roll holder to hold a roll including a tubular core member and a sheet wound around a periphery of the core member, and supplying the sheet from the roll held by the roll holder, by using a transportation device including: a body; an arm including a proximal section connected to the body and a distal section that is relatively displaceable with respect to the proximal section; and a transportation-side holder provided in the distal section of the arm, the transportation-side holder holding the roll, the sheet supply method comprising: a movement step of moving the transportation-side holder of the transportation device to a roll mounting section on which the roll is mounted; a roll acquisition step of causing the transportation-side holder of the transportation device to hold the roll mounted on the roll mounting section; an intermediate processing step of performing intermediate processing set in advance on the roll; and a setting step of causing the roll holder to hold the roll after the intermediate processing in a state where the sheet is continuously feedable. 
     By this method, the transportation device can automatically supply the roll mounted on the roll mounting section to the sheet supply device, and the intermediate processing device can perform intermediate processing on the roll. Therefore, a worker does not need to perform work for conveying and setting the roll mounted on the roll mounting section to the sheet supply device, and work related to the intermediate processing. Therefore, work efficiency can be enhanced. 
     Moreover, the intermediate processing is performed on the roll during movement from the roll mounting section to the sheet supply device. Therefore, the roll can be more securely set in the roll supporter of the sheet supply device in a state where the sheet is continuously feedable. 
     In the configuration described above, preferably, the intermediate processing step includes a sheet elimination step of eliminating a portion between an end on an outermost peripheral surface of the roll and a first position of the sheet on the outermost peripheral surface, and a portion between the first position and a second position of the sheet distant from the end on the outermost peripheral surface by a peripheral length or more of the roll out of the sheet of the roll. 
     In this way, the sheet positioned on the outermost periphery of the roll and having a stain is automatically eliminated during conveyance of the roll. Therefore, this makes it possible to enhance work efficiency, and to supply the sheet supply device with the appropriate roll that does not include the sheet having a stain. Also, when the end of the sheet is fixed with a tape or the like, this tape can also be eliminated automatically.