Patent Publication Number: US-8991738-B2

Title: Web winding apparatus

Description:
INCORPORATION BY REFERENCE 
     This application is based on and claims priority under 35 U.S.C. 119 with respect to Japanese Application No. 2012-069295 filed on Mar. 26, 2012, the entire content of which is incorporated herein by reference. 
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     This invention relates to a web winding apparatus which winds up a web thereon by cutting the web under transferring operation and winding a cut end portion thereof on an empty bobbin. 
     2. Description of Related Art 
     As an example of the related arts, in a web winding apparatus disclosed in JP2807857B (JP7-101604A), a rotatable disc shaped turret is provided and a pair of empty bobbins is detachably and rotatably supported on this turret with 180 degrees apart from each other. After the web has been fully wound up on one of the bobbins, the extended end of the web from the bobbin is cut and then the turret is rotated by 180 degrees to exchange the web wound-up bobbin for an empty bobbin thereby to press the end portion of the web onto the empty bobbin for smoothly winding the web on the bobbin. According to this winding apparatus, since the turret has to be rotated by 180 degrees with the weighty web fully wound up bobbin, the apparatus tends to be formed relatively in a large size. Further, since the weighty web wound up bobbin is supported on the turret, the turret has to be rotated with a lower speed, which may lead to longer bobbin exchange time. 
     On the other hand, JP3506818B (JP9-063565A) discloses a web winding apparatus which is provided with a rotating disc rotatably provided on a base board and a pair of arm members provided at the both sides of the board and each arm member is projected from the board. A pair of empty bobbins is detachably and rotatably supported on each tip end of the arm members. One of the tip ends of the arm members is set to a web winding position and the other of the tip ends is set to be a winding waiting position. When the bobbin supported on the one of the tip ends of the arm members becomes fully wound state by the web, the rotating disc is rotated by 180 degrees to have the fully wound bobbin to be set to the winding waiting position and the other empty bobbin to be set to the web winding position. Then, the web portion extending from the fully wound bobbin is pressed on the other empty bobbin and is cut. Then the end portion of the web is wound on the empty bobbin. According to this winding apparatus, after exchange of the web fully wound bobbin for an empty bobbin, the extended portion of the web from the fully wound bobbin is pressed onto the empty bobbin to be cut and then the cut end portion thereof is wound on the empty bobbin. This can continuously perform the web winding process, thereby to shorten the time necessary for winding. 
     DISCLOSURE OF INVENTION 
     However, according to the web winding apparatuses disclosed in the above JP2807857B (JP7-101604A) and JP3506818B (JP9-063565A), a rotating disc is provided which includes a rotatable turret and arm members for exchanging the web fully wound bobbin for an empty bobbin. These apparatuses become complex in structure and large in overall size. 
     This invention was made considering the above issues of the related art and it is an object of the invention to provide a web winding apparatus which is small in size and simple in construction. 
     The web winding apparatus associated with the invention is characterized in that the apparatus comprises two bobbins on which a web is wound, a cutter transferrable between the two bobbins and cutting the web to be transferred and two web pressing members each provided at each side of the cutter and swingable such that when one of the two web pressing members approaches the cutter, the other of the two web pressing members backs away from the cutter, the two web pressing members being transferrable between the two bobbins, wherein the two web pressing members are formed such that upon swinging, the two web pressing members move towards an empty bobbin at the side of the one of the two web pressing members which has been backed away from the cutter and upon swinging, the one of the two web pressing members which has approached the cutter presses an end portion of the web to be cut by the cutter on the empty bobbin thereby to wind the end portion of the web on the empty bobbin. 
    
    
     
       BRIEF DESCRIPTION OF THE ATTACHED DRAWINGS 
       Various aspects of this invention will become apparent to those skilled in the art from the following detailed description of the preferred embodiments, when read in light of the accompanying drawings, in which: 
         FIG. 1  is a perspective view seen from the front surface side of the web winding apparatus according to an embodiment of the present invention; 
         FIG. 2  is a perspective view seen from the back surface side of the web winding apparatus shown in  FIG. 1 ; 
         FIG. 3  is a view showing the first state (initial state) that the moving member is set to the position between the empty bobbin and the fully wound bobbin; 
         FIG. 4  is a view showing the second state that the moving member has been moved to the empty bobbin; 
         FIG. 5  is a view showing the third state indicating a state immediately before the web is cut; 
         FIG. 6  is a view showing the fourth state that the web is being cut; 
         FIG. 7  is a view showing the fifth state that the web has been wound on the empty bobbin; 
         FIGS. 8A through 8E  show the detail transitional operation states of the web from the third state to the fifth state and wherein  FIG. 8A  shows the state immediately before the web is cut,  FIG. 8B  and  FIG. 8C  show the states that the web is about to be cut,  FIG. 8D  shows the state that the web is being cut and  FIG. 8E  shows the state that the cut web is being wound on the empty bobbin; 
         FIG. 9  is a view showing the sixth state that the moving member has moved to an intermediate position between the empty bobbin and the fully wound bobbin; 
         FIG. 10  is a view showing the seventh state that the swinging member is being swung; 
         FIG. 11  is a view showing the eighth state that the fully wound bobbin has been removed; 
         FIG. 12  is a view showing the ninth state that the empty bobbin has been fully wound to become a fully wound bobbin; 
         FIG. 13  is a view showing the tenth state that the moving member has been moved to the empty bobbin side; 
         FIG. 14  is a view showing the eleventh state indicating a state immediately before the web is cut; 
         FIG. 15  is a view showing the twelfth state that the web is being cut; 
         FIG. 16  is a view showing the thirteenth state that the web has been wound on the empty bobbin; 
         FIG. 17  is a view showing the fourteenth state that the moving member has moved to an intermediate position between the empty bobbin and the fully wound bobbin; 
         FIG. 18  is a view showing the fifteenth state that the swinging member is being swung; and 
         FIG. 19  is a view showing the sixteenth state that the fully wound bobbin has been removed. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS OF THE INVENTION 
     The preferred embodiments of the web winding apparatus according to the invention will be explained hereinafter with reference to the attached drawings. 
     First Embodiment: 
     An Example of Applicable Subject of the Web Winding Apparatus: 
     The web winding apparatus according to this embodiment is, for example, applied to a device or an apparatus which is used for manufacturing process of lithium battery, wherein the process includes a step for preparing a web roll formed by a thin film web such as aluminum foil being wound around a bobbin, a step for winding off the web roll from the bobbin, step for conducting a coating treatment and step for rewinding the web to be a roll after drying. In more detail, the apparatus is used for winding a web on a bobbin such that upon winding the web on the bobbin to be shaped as a roll, cutting the web fully wound on a bobbin during web transferring operation and winding the end portion of the cut web on another empty bobbin. More particularly, the web winding apparatus according to this embodiment is an apparatus which can wind the end portion of the cut web on an empty bobbin and wind the web on the empty bobbin without providing an exchange device for exchanging a fully wound bobbin for an empty bobbin and yet without stopping the rotational operation of the fully wound bobbin. 
     Overall Structure of the Web Winding Apparatus: 
     The overall structure of the web winding apparatus according to this embodiment will be explained with reference to  FIG. 1  which shows the front surface side of the apparatus and  FIG. 2  which shows the back surface side thereof. It is noted here that the web winding apparatus according to the embodiment shows the apparatus in which the web fully wound on the bobbin is cut during the transferring operation thereof and the cut end portion of the web is wound on another empty bobbin to wind the web on the empty bobbin side. Accordingly,  FIG. 1  shows the apparatus having two bobbins, one (right side in  FIG. 1 ) being the fully wound bobbin and the other (left side in  FIG. 1 ) being the empty bobbin. 
     As shown in  FIGS. 1 and 2 , the web winding apparatus is formed by a base board  10 , a moving member  20 , a movement drive device  30 , a swinging member  40 , a swing drive device  50 , four web supporting members  61  through  64 , a transfer roller  65 , a cutting device  70 , a first web pressing member  81  and a second web pressing member  82 , a cutting and winding drive device  90 , a first bobbin  101  and a second bobbin  102  and first and second bobbin drive devices  110  and  111 . The web winding apparatus is basically formed to have cutting structure for cutting a web U by the cutting device  70  and winding structure for winding the cut web to one of the first and the second bobbins 101  and  102  by pressing the web thereon by one of the first and the second web pressing members  81  and  82 . 
     The base board  10  includes a bed  11  provided on a floor and a wall member  12  provided on the bed  11  and projecting from the bed  11 . The base board formed by the bed  11  and the wall member  12  is securely fixed to the floor. A rectangular shaped window portion  13  is provided at a center portion of the wall member  12 . The two bobbins  101  and  102  are rotatably supported on the front side of the wall member  12  at both sides of the window portion  13  and the transfer roller  65  is also rotatably supported on the lower portion of the wall portion  12  below the central portion of the window portion  13 . The moving member  20  is supported on the back side of the wall member  12  and movable along the window portion  13  in a horizontal direction. The two bobbin drive devices  110  and  111  are respectively supported on both sides of the window portion  13  for respectively driving the first and the second bobbins  101  and  102 . 
     The moving member  20  is formed to be approximately in rectangular shape and the length in height direction thereof is longer than the length in a height direction of the window portion  13 . The moving member  20  is provided on the back side of the wall member  12  in parallel therewith, crossing over the window portion  13  in the height direction and movable along the window portion  13  in a horizontal direction. The swinging member  40  is swingably supported on the moving member  20  and a cutter  71  of the cutting device  70  is rotatably supported on the moving member  20 . Further, the cutting and winding drive device  90  is also supported on the moving member  20 . 
     The movement drive device  30  is formed by a pair of rails  31  and  31 , a ball screw  32 , a nut  33  engageable with the ball screw  32 , a gear motor  34  and a bearing  35 . The pair of rails  31  and  31  is provided on the back side of the wall member  12  and at both sides of the window portion  13  in a height direction and is extending in a horizontal direction in parallel with each other. The moving member  20  is provided on the pair of rails  31  and  31  and slidably movably guided thereon in a horizontal direction. The ball screw  32  is provided on the back side of the wall member  12  at the upper portion thereof and is extending in a horizontal direction in parallel with the pair of rails  31  and  31 . The ball screw 32  is inserted into and engaged with the nut  33 . One end of the ball screw  32  is connected to a motor shaft of the gear motor  34  fixed to the back side of the wall member  12  at the upper portion thereof and the other end of the ball screw  32  is rotatably connected to the bearing  35  fixed to the back side of the wall member  12  at the upper portion thereof but opposite side of the gear motor  34  in a horizontal direction. 
     The movement drive device  30  is a device which moves the moving member  20  between the first bobbin  101  and the second bobbin  102 . In more detail, the movement drive device  30  moves the moving member  20  in the first bobbin  101  direction until the second web pressing member  82  which moves together with the moving member  20  approaches and opposes the first bobbin  101  with a small gap formed between an outer peripheral surface of the second web pressing member  82  and an outer peripheral surface of the first bobbin  101 . Further, the movement drive device  30  moves the moving member  20  in the second bobbin  102  direction until the first web pressing member  81  which moves together with the moving member  20  approaches and opposes the second bobbin  102  with a small gap formed between an outer peripheral surface of the first web pressing member  81  and an outer peripheral surface of the second bobbin  102 . 
     The swinging member  40  is formed to be with a V-shape. The bottom portion  41  of the V-shape of the swinging member  40  faces downward and is swingably supported on the front surface of the moving member  20 , i.e., on the side where the moving member  20  faces the window portion  13 . The swinging member  40  swings or rotates centering on the bottom portion  41 . Two cutter receiving members  72  and  73  of the cutting device  70 , four web supporting members  61  through  64  and two web pressing members  81  and  82  are provided on a first arm portion  42  of the V-shaped swinging member  40  extending from the bottom portion  41  of V-shape of the swinging member  40  towards the first bobbin  101  side and a second arm portion  43  of the V-shape extending from the bottom portion  41  towards the second bobbin  102  side, respectively. 
     The swing drive device  50  is formed by a gear motor  51  and other associated components. The gear motor  51  is fixed to the back side of the moving member  20  and the motor shaft of the gear motor  51  is inserted into the moving member  20  and is connected to the bottom portion  41  of the swinging member  40 . 
     The swing drive device  50  is a device which drives the swinging member  40  to swing so that the first arm portion  42  and the second arm portion  43  of the swinging member  40  alternately approach the cutter  71  of the cutting device  70  (or alternately separate from the cutter  71 ). In more detail, the swing drive device  50  is a device which drives the swinging member  40  to swing so that the first cutter receiving member  72  which swings together with the first arm portion  42  of the swinging member  40  approaches the cutter  71  until a circular arc peripheral surface of the first cutter receiving member  72  and the outer peripheral surface of the cutter  71  face each other with a small gap therebetween upon rotation of the first cutter receiving member  72 . Further the swing drive device  50  drives the swinging member  40  to swing so that the second cutter receiving member  73  which swings together with the second arm portion  43  of the swinging member  40  approaches the cutter  71  until a circular arc peripheral surface of the second cutter receiving member  73  and the outer peripheral surface of the cutter  71  face each other with a small gap therebetween upon rotation of the second cutter receiving member  73 . 
     The first web supporting member  61  and the second web supporting member  62  are formed to be in cylindrical shape and freely rotatably supported on both ends of the first arm portion  42  respectively. In other words, the first and the second web supporting members  61  and  62  are formed such that the tip end side of the web U which is to be wound on the bobbin  101  is transferred from the transfer roller  65  to the second web supporting member  62  through the first web supporting member  61 . 
     The third web supporting member  63  and the fourth web supporting member  64  are formed to be in cylindrical shape and freely rotatably supported on both ends of the second arm portion  43  respectively. In other words, the third and the fourth web members  63  and  64  are formed such that the tip end side of the web U which is to be wound on the bobbin  102  is transferred from the transfer roller  65  to the third web supporting member  63  through the fourth web supporting member  64 . 
     The transfer roller  65  is supported on the front side of the wall member  12  at a central portion thereof and is positioned below the window portion  13 . In other words, the roller  65  supports the web U transferred from the exterior of the apparatus and feeds the web U in from the lower side of the web winding apparatus. According to this embodiment, the web U which has passed through the roller  65  is transferred through the first web supporting member  61  or the third web supporting member  63  both of which are supported by the swinging member  40 . 
     The cutting device  70  includes the cutter  71 , the first cutter receiving member  72  and the second cutter receiving member  73 . The cutter  71  is formed to be in cylindrical shape and rotatably supported on the moving member  20  between the first and the second arm portions  42  and  43  thereof extending vertically upward from the bottom portion  41  of the V-shaped swinging member  40 . A cutter edge or blade  71   a  is provided on the periphery of the cylindrical cutter  71  for cutting the web U. In the state of  FIG. 1 , since the web is not wound on the first bobbin  101  (empty condition), the cutter  71  is rotated in the same direction to the first bobbin  101  for cutting the web U which is fully wound on the other second bobbin  102 . However, when the second bobbin  102  is empty and the first bobbin  101  is fully wound, the winding operation is carried out in reverse. 
     The first cutter receiving member  72  is formed to be approximately in a cylindrical shape with a portion of the outer periphery being taken away in an axial direction. The first cutter receiving member  72  is provided between the first and the second web supporting members  61  and  62  which are provided on the first arm portion  42  of the swinging member  40  together with the first web pressing member  81  and is rotatably supported on the first arm portion  42 . In other words, the first cutter receiving member  72  is provided such that the tip end side of the web U which is to be wound on the first bobbin  101  is transferred to the second web supporting member  62  from the first web supporting member  61  through the first web pressing member  81  and the first cutter receiving member  72 . 
     Since the first cutter receiving member  72  faces the cutter  71  with a small gap between the circular arc peripheral surface of the first cutter receiving member  72  and the outer peripheral surface of the cutter  71 , the first cutter receiving member  72  serves as a holder when the web U held in the small gap formed between the first cutter receiving member  72  and the cutter  71  is cut by the blade  71   a  of the cutter  71 . Accordingly, as shown in the enlarged view “A” indicated in  FIG. 1 , a groove portion  72   a  is formed on the circular arc peripheral surface of the first cutter receiving member  72  as an escape area for the cutter blade  71   a  of the cutter  71  after cutting operation. This first cutter receiving member  72  is used when the web U which has been fully wound on the first bobbin  101  is cut as shown in  FIGS. 14 and 15 . It is noted that a suction hole may be provided in the groove portion  72   a  for vacuuming chips of the web U generated upon cutting operation into the hole. 
     The second cutter receiving member  73  is formed to be approximately in a cylindrical shape having the same diameter with the first cutter receiving member  72 , with a portion of the outer periphery being taken away in an axial direction. The second cutter receiving member  73  is provided between the third and the fourth web supporting members  63  and  64  which are provided on the second arm portion  43  of the swinging member  40  together with the second web pressing member  82  and is rotatably supported on the second arm portion  43 . In other words, the second cutter receiving member  73  is provided such that the tip end side of the web U which is to be wound on the second bobbin  102  is transferred to the fourth web supporting member  64  from the third web supporting member  63  through the second web pressing member  82  and the second cutter receiving member  73 . 
     Since the second cutter receiving member  73  faces the cutter  71  with a small gap between the circular arc peripheral surface of the second cutter receiving member  73  and the outer peripheral surface of the cutter  71 , the second cutter receiving member  73  serves as a holder when the web U held in the small gap formed between the second cutter receiving member  73  and the cutter  71  is cut by the blade  71   a  of the cutter  71 . Accordingly, as similar to the structure of the first cutter receiving member  72 , a groove portion  73   a  is formed on the circular arc peripheral surface of the second cutter receiving member  73  as an escape area for the cutter blade  71   a  of the cutter  71  after cutting operation. This second cutter receiving member  73  is used when the web U which has been fully wound on the second bobbin  102  is cut. It is noted that a suction hole may be provided in the groove portion  73   a  for vacuuming chips of the web U generated upon cutting operation into the hole as similar to the structure in the groove portion  72   a.    
     The first web pressing member  81  is formed to be in approximately half cylindrical shape having a diameter same as the diameter of the first cutter receiving member  72  and a portion of the outer periphery thereof is taken away in an axial direction to form a flat surface thereon. The first web pressing member  81  is provided between the first and the second web supporting members  61  and  62  which are provided on the first arm portion  42  of the swinging member  40  together with the first cutter receiving member  72 . The first web pressing member  81  is supported on the first arm portion  42  and rotatable in a direction opposite to the rotation of the first bobbin  101 . In other words, the first web pressing member  81  is provided such that the tip end side of the web U which is to be wound on the first bobbin  101  is transferred to the second web supporting member  62  from the first web supporting member  61  through the first web pressing member  81  and the first cutter receiving member  72 . Since the first web pressing member  81  faces with the second bobbin  102  with a small gap between the outer peripheral surface of the first web pressing member  81  and the outer peripheral surface of the second bobbin  102 , the end portion of the web U is held in the small gap between the first web pressing member  81  and the second bobbin  102  is pressed onto the second bobbin  102  so that the end portion of the web U is adhered to a double face adhesive tape  102   a  (refer to  FIG. 10 ) provided on the outer peripheral surface of the second bobbin  102 . 
     The second web pressing member  82  is formed to be in approximately half cylindrical shape having a diameter same as the diameter of the second cutter receiving member  73  and a portion of the outer periphery thereof is taken away in an axial direction to form a flat surface thereon. The second web pressing member  82  is provided between the third and the fourth web supporting members  63  and  64  which are provided on the second arm portion  43  of the swinging member  40  together with the second cutter receiving member  73 . The second web pressing member  82  is supported on the second arm portion  43  and rotatable in a direction opposite to the rotation of the second bobbin  102 . In other words, the second web pressing member  82  is provided such that the tip end portion of the web U which is to be wound on the second bobbin  102  is transferred to the fourth web supporting member  64  from the third web supporting member  63  through the second web pressing member  82  and the second cutter receiving member  73 . Since the second web pressing member  82  faces with the first bobbin  101  with a small gap between the outer peripheral surface of the second web pressing member  82  and the outer peripheral surface of the first bobbin  101 , the end portion of the web U is held in the small gap and is pressed onto the first bobbin  101  so that the end portion of the web U is adhered to a double face adhesive tape  101   a  (refer to  FIG. 3 ) provided on the outer peripheral surface of the first bobbin  101 . 
     The cutting and winding drive device  90  is formed by a cutter drive device  91  for driving the cutter  71  and a web receiving and pressing drive device  92  for driving the first and the second cutter receiving members and the first and the second web pressing members  81  and  82 . The cutter drive device  91  includes a gear motor  93 . The gear motor  93  is fixed to the back surface of the moving member  20  and a motor shaft of the gear motor  93  is inserted into the moving member  20  and connected to the rotation shaft of the cutter  71 . 
     The web receiving and pressing drive device  92  is formed by pulleys  94 , belt  95  and a gear motor  96 . The pulleys  94  are inserted into the respective rotation shafts of the first and the second cutter receiving members  72  and  73  and the first and the second web pressing members  81  and  82 , each member being projecting towards the back side of the swinging member  40  and the motor shaft of the gear motor  96 . The belt  95  is wound around over all pulleys  94 . The gear motor  96 , a portion of which is shown in  FIG. 1 , is fixed to the back side of the swinging member  40  between the swinging member  40  and the moving member  20  and the motor shaft of the gear motor  96  is inserted into the swinging member  40 . 
     The cutter drive device  91  is structured to rotate the cutter  71  in the same direction (in a clockwise direction as viewed in  FIG. 1 ) with the rotation direction of the first bobbin  101  synchronizing with the first bobbin  101  when the web U is wound on the first bobbin  101  and to rotate the cutter  71  in the same direction (in a counterclockwise direction as viewed in  FIG. 1 ) with the rotation direction of the second bobbin  102  synchronizing with the second bobbin  102  when the web U is wound on the second bobbin  102 . In detail, the moving speed of the outer peripheral surface of the cutter  71  is set to be equal to the moving speed of the outer peripheral surface of the first bobbin  101  or the second bobbin  102 . 
     The web receiving and pressing drive device  92  is structured to rotate the first and the second cutter receiving members  72  and  73  and the first and the second web pressing members  81  and  82  in the opposite direction (in a clockwise direction as viewed in  FIG. 1 ) with the rotation direction of the first bobbin  101  synchronizing with the first bobbin  101  when the web U is wound on the first bobbin  101  and to rotate the first and the second cutter receiving members  72  and  73  and the first and the second web pressing members  81  and  82  in the opposite direction (in a clockwise direction as viewed in  FIG. 1 ) with the rotation direction of the second bobbin  102  synchronizing with the second bobbin  102  when the web U is wound on the second bobbin  102 . In detail, the moving speeds of the outer peripheral surfaces of the first and the second cutter receiving members  72  and  73  are set to be equal to the moving speed of the outer peripheral surface of the cutter  71  or the moving speeds of the outer peripheral surfaces of the first and the second web pressing members  81  and  82  are set to be equal to the moving speed of the outer peripheral surface of the first bobbin  101 . 
     The first and the second bobbins  101  and  102  are supported on the front side of the wall member  12  of the base board  10  at both sides of the window portion  13  and are rotatable about the respective center axes in opposite directions. The first and the second bobbins  101  and  102  are detachably inserted into respective bobbin carrying shafts  116  and  121 . As shown in  FIG. 1 , when the second bobbin  102  is fully wound by the web U, the other first bobbin  101  is used for winding the web U thereon. On the contrary, when the first bobbin  101  is fully wound by the web U, the second bobbin  102  is used for winding the web U thereon. The empty state bobbins  101  and  102  are provided with the double face adhesive agents  101   a  and  102   a  (See  FIG. 3  and  FIG. 10 ). 
     A first bobbin drive device  110  is formed by a cover  112 , pulleys  113 , belt  114 , gear motor  115  and the bobbin carrying shaft  116 . The cover  112  is fixed to the back side of the wall member  12  of the base board  10  at the outside (right side as viewed in  FIG. 2 ) of the window portion  13  and covers the pulleys  113  and the belt  114 . The pulleys  113  are inserted into the bobbin carrying shaft  116  and the motor shaft of the gear motor  115  which are projecting towards the back side of the wall portion  12  of the base board  10 . The belt  114  is wound on the two pulleys  113  and bridging over therebetween. The gear motor  115  is fixed to the back side of the cover  112  and the motor shaft of the gear motor  115  is inserted into the cover  112 . The bobbin carrying shaft  116  is rotatably inserted into the wall member  12  of the base board  10  through a bearing (not shown). The first bobbin  101  is supported on the bobbin carrying shaft  116  at the front side of the wall member  12 . 
     The second bobbin drive device  111  is formed by a cover  117 , pulleys  118 , a belt  119 , a gear motor  120  and bobbin carrying shaft  121 . The cover  117  is fixed to the back side of the wall member  12  of the base board  10  at the outside (left side as viewed in  FIG. 2 ) of the window portion  13  and covers the pulleys  118  and the belt  119 . The pulleys  118  are inserted into the bobbin carrying shaft  121  and the motor shaft of the gear motor  120  which are projecting towards the back side of the wall portion  12  of the base board  10 . The belt  119  is wound on the two pulleys  118  and bridging over therebetween. The gear motor  120  is fixed to the back side of the cover  117  and the motor shaft of the gear motor  120  is inserted into the cover  117 . The bobbin carrying shaft  121  is rotatably inserted into the wall member  12  of the base board  10  through a bearing (not shown). The second bobbin  102  is supported on the bobbin carrying shaft  121  at the front side of the wall member  12 . 
     (Web Winding Operation of the Web Winding Apparatus) 
     The operation of cutting the web fully wound on the bobbin and winding the cut web on the empty side bobbin will be explained with reference to  FIGS. 3 through 19 .  FIGS. 3 through 19  (except  FIGS. 8A through 8E ) show the various states following the time course of operation). First, the state shown in  FIG. 3  is assumed to be the initial state (first state). The initial state is the state that the second bobbin  102  is being rotated in the clockwise direction thereby to wind-up the web U on the second bobbin. The second bobbin  102  is in the state where the web U is fully wound on the bobbin. Under this state, the moving member  20  is set to be positioned at the middle of the first and the second bobbins  101  and  102 , the second arm portion  43  of the swinging member  40  is set to be in approached position to the cutter  71  (the first arm portion  42  at this state being set to be in separated position from the cutter  71 ) and the cutter  71  is stopped with the blade  71   a  facing downward. The second cutter receiving member and the second web pressing member  82  are stopped with the flat surfaces thereof being inclined with an inclined angle of approximately the same with the inclined angle of the second arm portion  43 . The cutter  71  and the second cutter receiving member  73  are separated from each other and the flat surfaces of the second web pressing member  82  and the second cutter receiving member  73  are positioned on the same plane. The web U which is transferred from outside through the transfer roller  65  is being wound on the second bobbin  102  from the third web supporting member  63  via the second web pressing member  82 , the second cutter receiving member  73  and the fourth web supporting member  64 . 
     The first state is set to be the reference position and as shown in  FIG. 4 , under second state, the swinging member  40 , the cutter  71 , the second cutter receiving member  73  and the second web pressing member  82  are kept unchanged, but the moving member  20  moves towards the empty bobbin  101  side to set the position of the second web pressing member  82  by approaching the second web pressing member  82  towards the first bobbin  101  side. In this state, the web U which is transferred from outside through the transfer roller  65  is continuously being wound on the second bobbin  102  from the third web supporting member  63  via the second web pressing member  82 , the second cutter receiving member  73  and the fourth web supporting member  64 . 
     Then as shown in  FIGS. 5 ,  6  and  7 , which show the third, fourth and fifth state, respectively, the cutter  71  and the first bobbin  101  are rotated in the counterclockwise direction with the speed same as the transfer speed of the web U for synchronized rotation therewith. At the same time, the second cutter receiving member  73  and the second web pressing member  82  are rotated in the clockwise direction with the speed same as the transfer speed of the web U for synchronized rotation therewith to perform web cutting operation and web winding operation. In the cutting device  70 , the cutter blade  71   a  of the cutter  71  and the groove portion  73   a  of the cutter receiving member  73  are operated to closely approach each other and cut the web U being transferred by pressingly holding the web U between the cutter blade  71   a  and the groove portion  73   a  and at the same time, the outer peripheral surface of the second web pressing member  82  and the outer peripheral surface of the first bobbin  101  are operated to closely approach each other and the cut end portion of the web U is pressed by the outer peripheral surface of the second web pressing member  82  on the outer peripheral surface of the first bobbin  101  to wind the end portion on the first bobbin  101 . The wound end portion of the web U is then adhered to the double face adhesive tape  101   a  and then the web U is wound on the first bobbin  101  in accordance with the rotation of the bobbin  101 . If the speed of the rotation of the first bobbin  101  is constant, the transfer speed of the web U becomes higher as the winding diameter of the web becomes large. Therefore, the transfer speed of the web U is kept constant by lowering the rotation speed of the first bobbin  101  as the winding diameter of the web U becomes large. 
     The detail operation of web cutting and winding will be explained hereinafter with reference to  FIGS. 8A through 8E . During operation shown in  FIG. 8A  from operation shown in  FIG. 8B , the cutter  71  and the first bobbin  101  initiate synchronized rotation in the counterclockwise direction and the rotation speed is accelerated to agree to the transfer speed of the web U. After the both speeds agreed, the synchronized rotation speed of the cutter  71  and the first bobbin  101  and the transfer speed of the web U are controlled to be the same speed. At the same time, the second cutter receiving member  73  and the second web pressing member  82  initiate synchronized rotation in the clockwise direction and the synchronized rotation speed is accelerated to agree to the transfer speed of the web U. After the both speeds agreed, the synchronized rotation speed of the second cutter receiving member  73  and the second web pressing member  82  and the transfer speed of the web U are controlled to be the same speed. Then the portion of the web U indicated by the symbol “Ua” in  FIG. 8B  starts to be squeezed between the cutter blade  71   a  and the groove portion  73   a  and the portion indicated by the symbol “Ub” in  FIG. 8B  starts to be squeezed between the outer peripheral surfaces of the second web pressing member  82  and the first bobbin  101 . 
     Under the state shown in  FIG. 8A , sufficient gaps are shown between the outer peripheral surfaces of the cutter  71  and the first bobbin  101  and between the outer peripheral surfaces of the second web pressing member  82  and the first bobbin  101 . Accordingly, at this stage the web U being transferred is not held or squeezed between the outer peripheral surfaces of the cutter  71  and the first bobbin  101  and between the outer peripheral surfaces of the second web pressing member  82  and the first bobbin  101 . 
     Under the state shown in  FIG. 8B , the synchronized speeds of the cutter  71  and the first bobbin  101  and the second web pressing member  82  and the first bobbin  101  are under acceleration and accordingly, the transfer speed of the web U held between the outer peripheral surface of the cutter  71  and the outer peripheral surface of the first bobbin  101  and the transfer speed of the web U held between the outer peripheral surface of the second web pressing member  82  and the outer peripheral surface of the first bobbin  101  are consecutively changing. Therefore, the rotation speeds of the gear motors  93  and  96  of the cutting and winding drive device  90  are controlled to accord the rotation speeds of the outer peripheral surfaces of the cutter  71  and the first bobbin  101  and the outer peripheral surfaces of the second web pressing member  82  and the first bobbin  101  to the transfer speed of the web U. It is noted that the third and the fourth web supporting members  63  and  64  are properly supporting the web U. 
     Then as shown in  FIGS. 8C and 8D , the cutter  71  and the first bobbin  101  make further synchronizing rotation in the counterclockwise direction and at the same time the second cutter receiving member  73  and the second web pressing member  82  make synchronizing rotation in the clockwise direction. Then the web U at the portion Ua is squeezed between the cutter blade  71   a  and the groove  73   a  of the second cutter receiving member  73  and cut therebetween. The downstream side of the web U from the portion Ub is held between the outer peripheral surfaces of the second web pressing member  82  and the first bobbin  101  and is wound on the outer peripheral surface of the first bobbin  101  to be adhered to the double face adhesive tape  101   a  provided on the outer peripheral surface of the bobbin  101 . Accordingly, the end portion of the web U can be wound on the outer peripheral surface of the first bobbin  101  without stopping the rotation of the first bobbin  101 . 
     As shown in  FIG. 8E , the cutter  71  and the first bobbin  101  make further synchronizing rotation in the counterclockwise direction and at the same time, the second cutter receiving member  73  and the second web pressing member  82  make further synchronizing rotation in the clockwise direction. The web portion between the portions Ua and Ub are wound on the outer peripheral surface of the first bobbin  101 . Then the rotations of the cutter  71 , the second cutter receiving member  73  and the second web pressing member  82  are stopped and only the rotation of the first bobbin  101  is continued to be rotated to wind the web U thereon. 
     Next, as shown in  FIG. 9  which shows the sixth state, the moving member  20  is moved towards the second bobbin  102  side which is fully wound by the web U and is positioned at the intermediate portion between the first and the second bobbins  101  and  102 , keeping the swinging member  40 , cutter  71 , the second cutter receiving member  73  and the second web pressing member  82  unchanged. Under this sixth state, the cut web U at the first bobbin  101  side is transferred and wound on the bobbin  101  with tension given by the first bobbin  101 . 
       FIG. 10  shows the seventh state and under this state, the swinging member  40  swings to set the position thereof so that the first arm portion  42  of the swinging member  40  approaches the cutter  71  (the second arm portion  43  separates from the cutter  71 ). Under this state, the cutter stops with the blade  71   a  facing downward. The first cutter receiving member  72  and the first web pressing member  81  are stopped with the flat surfaces thereof being inclined with an inclined angle of approximately the same with the inclined angle of the first arm portion  42 . The cutter  71  and the first cutter receiving member  72  are separated from each other and the flat surfaces of the first web pressing member  81  and the first cutter receiving member  72  are positioned on the same plane. The web U which is transferred from outside through the transfer roller  65  is being wound on the first bobbin  101  from the first web supporting member  61  via the first web pressing member  81 , the first cutter receiving member  72  and the second web supporting member  62 . As shown in  FIGS. 10 and 11  which show the seventh and the eighth states respectively, the second bobbin  102  on which the web U has been fully wound is detached from the bobbin carrying shaft  121  and a new empty second bobbin  102  with the double face adhesive tape thereon is inserted into the bobbin carrying shaft  121 . 
     As shown in  FIG. 12  which shows the ninth state, after the first bobbin is fully wound by the web U, the moving member  20  moves towards the empty second bobbin  102  side keeping the swinging member  40 , the cutter  71 , the first cutter receiving member  72  and the first web pressing member  81  unchanged thereby to set the position by approaching the first web pressing member  81  to the second bobbin  102  as shown in  FIG. 13  which shows the tenth state. The web U which has been transferred from outside through the transfer roller  65  is wound on the first bobbin  101  from the first web supporting member  61  via the first web pressing member  81 , first cutter receiving member  72  and the second web supporting member  62 . 
     As shown in  FIGS. 14 ,  15  and  16  which show the eleventh, twelfth and thirteenth respectively, the cutter  71  and the second bobbin  102  make a synchronized rotation in the counterclockwise direction to accord the rotation speed to the transfer speed of the web U and at the same time, the first cutter receiving member  72  and the first web pressing member  81  make a synchronized rotation in the clockwise direction to accord the rotation speed to the transfer speed of the web U thereby to perform cutting and winding operations. 
     Next, as shown in  FIG. 17  which shows the fourteenth state, the moving member  20  is moved towards the first bobbin  101  side which is fully wound by the web U and is positioned at the intermediate portion between the first and the second bobbins  101  and  102 , keeping the swinging member  40 , cutter  71 , the first cutter receiving member  72  and the first web pressing member  81  unchanged. Under this fourteenth state, the cut web U at the second bobbin  102  side is transferred and wound on the bobbin  102  with tension given by the second bobbin  102 . 
     Further, as shown in  FIG. 18  which shows the fifteenth state, the swinging member  40  swings to set the position thereof so that the second arm portion  43  of the swinging member  40  approaches the cutter  71  (the first arm portion  42  separates from the cutter  71 ). Under this state, the cutter  71  stops with the blade  71   a  facing downward. The second cutter receiving member  73  and the second web pressing member  82  are stopped with the flat surfaces thereof being inclined with an inclined angle of approximately the same with the inclined angle of the second arm portion  43 . The cutter  71  and the second cutter receiving member  73  are separated from each other and the flat surfaces of the second web pressing member  82  and the second cutter receiving member  73  are positioned on the same plane. The web U which is transferred from outside through the transfer roller  65  is being wound on the second bobbin  102  from the third web supporting member  63  via the second web pressing member  82 , the second cutter receiving member  73  and the fourth web pressing member  64 . As shown in  FIGS. 18 and 19  which show the fifteenth and the sixteenth states respectively, the first bobbin  101  on which the web U has been fully wound is detached from the bobbin carrying shaft  116  and a new empty first bobbin  101  with the double face adhesive tape thereon is inserted into the bobbin carrying shaft  116 . The operation showing the first to sixteenth states is repeated. 
     As explained above, the cutter  71  and one of the first and the second web pressing members  81  and  82  approach one of the empty first and the second bobbins  101  and  102  to cut the web U to be transferred and to wind the web on the empty bobbin. This structure can eliminate a conventional large sized and complicated bobbin exchange device and can provide a small sized and simply structured web winding apparatus. 
     Further, since either one of the first or the second web pressing member  81  or  82 , either one of the second or the first bobbin  102  or  101  and the cutter  71  makes a synchronized rotation to cut the web U which is being transferred and to wind the cut web on the empty bobbin side, the web U can be accurately transferred to prevent any cutting defect or winding failure caused by defective transfer operation. Further, either one of the first or the second web pressing member  81  or  82  is formed to wind the end portion of the web U which has been fully wound on either one of the second or the first bobbin  102  and  101  on the other empty bobbin. Thus, the fully wound bobbin can be removed and empty bobbin can be replaced therefor and these two operations can be alternately made to improve efficiency of web U winding operation. 
     Further, the cutter  71  and either one of the first cutter receiving member  72  or the second cutter receiving member  73  are formed to cut the web U by sandwiching therebetween. This can improve the accuracy of cutting operation and successfully wind the web U on either one of the second bobbin  102  or the first bobbin  101 . Still further, the web supporting members  61  through  64  are formed to support the web U which is being transferred. This can transfer the web U giving proper tension thereon thereby preventing the web U from entrapment into or undesired entanglement with the first or the second cutter receiving member  72  or  73  under rotation and the cutter  71 . 
     By swinging the swinging member  40  centering on the bottom portion  41  of V-shape, when the first web pressing member  81  or the second web pressing member  82  moves to the empty bobbin side, one of the web pressing members which has been away from the cutter  71  can be escaped outside from the empty bobbin without interfering therewith. Thus the other web pressing member which has approached to the cutter  71  by swinging of the swinging member  40  can surely press and wind the end portion of the web U which is to be cut by the cutter  71  on the empty bobbin. 
     According to a first aspect of the embodiment of the invention, the web winding apparatus includes two bobbins  101 ,  102  on which a web U is to be wound, a cutter  71  transferrable between the two bobbins and cutting the web to be transferred and two web pressing members  81  and  82  positioned at opposite sides of the cutter and swingable such that when one of the two web pressing members approaches the cutter, the other of the two web pressing members backs away from the cutter, the two web pressing members being transferrable together with the cutter between the two bobbins, wherein the two web pressing members  81  and  82  are formed such that upon swinging, the two web pressing members move towards an empty one of the two bobbins positioned at one of the two web pressing members side which has been backed away from the cutter and upon swinging, the other of the two web pressing members which has approached the cutter presses an end portion of the web on the empty bobbin which has been cut by the cutter thereby to wind the end portion of the web on the empty bobbin 
     According to the first aspect of the embodiment of the invention, a complex and large sized bobbin exchange device can be eliminated and the web winding apparatus which is small in size and simple in structure can be proposed. 
     According to another aspect (second aspect) of the embodiment of the invention, the web winding apparatus is characterized in that the two bobbins  101  and  102  are rotatably supported on respective central axes  116  and  121  thereof and rotatable in opposite directions to each other, the cutter  70  is rotatable in the same direction with respective rotation directions of the two bobbins, the two web pressing members  81  and  82  are rotatable in the opposite directions to the rotation directions of the respective empty bobbins  102  or  101  on which the end portion of the web U has been pressed. The apparatus is further characterized in that by rotating one of the web pressing members  81  or  82  synchronizing with the rotations of the corresponding one of the empty bobbins  102  or  101  and the cutter  70  at a predetermined position where the one web pressing member  81  has approached the one empty bobbin  102 , the end portion of the web which is to be cut by the cutter is wound on the one empty bobbin. 
     This structure of the embodiment can achieve a highly precise transfer operation and at the same time prevent the web from cutting failure or winding failure caused by inaccurate web transfer operation. 
     According to further aspect (third aspect) of the embodiment, the web pressing members  81  and  82  are formed so that the end portion Ua or Ub of the web U which has been fully wound on the other  101  of the two bobbins  101  or  102  is wound on the one bobbin  102  which is empty. 
     According to this structure, the removing of the fully wound bobbin and attaching of the empty bobbin can be alternately performed, which can, in turn, improve web winding efficiency. 
     According to further aspect (fourth aspect) of the embodiment of the invention, two cutter receiving members  72  and  73  are provided at respective sides in web transfer directions of the two web pressing members  81  and  82  and swingable with the two web pressing members  81  and  82  for cutting the web with the cutter by sandwiching the web giving a pressure together therewith. 
     This structure can enable the web U to be accurately cut, thereby to wind the web on the bobbin successfully. 
     According to still another aspect (fifth aspect) of the embodiment of the invention, the web supporting members  61  through  64  for supporting the web to be transferred are rotatably provided at respective sides of two pairs of the web pressing members  81 ,  82  and the cutter receiving members  72 ,  73  and swingable with the two pairs of the web pressing members  81 ,  82  and the cutter receiving members  72 ,  73 . 
     Since the web supporting members  61  through  64  support the web U to be transferred so that the web can be smoothly transferred without being loosened by applying an appropriate tension on the web, this can prevent the web from entrapment into the web pressing members  81 ,  82  or the cutter  70 . 
     Further, according to further aspect (sixth aspect) of the embodiment, the two pairs of the web pressing members  81  and  82 , the cutter receiving members  72  and  73  and the web supporting members  61  through  64  are arranged to form a V-shape. 
     In this sixth aspect of the structure of the embodiment, the bent portion  41  (bottom of V-shape) V-shaped swinging members  40  is set to be the swinging center and when the web pressing members  81 ,  82  are moved to the empty bobbin, the web pressing member  81  which has been backed away from the cutter  71  upon swinging can escape from the empty bobbin outside thereof without interfering with the empty bobbin. Thus, the web pressing member  82  which has been approached towards the cutter  71  upon swinging can surely press the end portion of the web to be cut by the cutter on the empty bobbin and wind the web thereon.