Patent Publication Number: US-11396390-B2

Title: Filling apparatus

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application claims priority from Japanese Patent Application No. 2018-122254 filed with the Japan Patent Office on Jun. 27, 2018, the entire content of which is hereby incorporated by reference. 
     BACKGROUND 
     1. Technical Field 
     The present disclosure relates to a spout-equipped bag filling apparatus. 
     2. Related Art 
     A filling apparatus for filling the spout-equipped bag with liquid or a viscous body of, for example, a liquid beverage such as a soft drink, food, medicine, or detergent is known. 
     A spout of the spout-equipped bag is a pouring outlet at the time of opening. The spout-equipped bag is a packaging bag which enables a user to ingest or use the contents of the liquid or viscous body of the liquid beverage such as a soft drink, food, or medicine when needed. For example, the following packaging bags are known as examples of the spout-equipped bags. In the spout-equipped bag, a gusset film is folded inward from both sides of a front and back pair of exterior films. A peripheral edge portion of the gusset film is heat sealed to the exterior films. Further, the spout is attached to upper and lower edges of the exterior film. By the spout, a mouth which is the pouring outlet for the bag heat-sealed mutually can be opened or closed with a plug such as a screw cap. 
     For example, JP-A-2005-59928 discloses a bag formed of a composite material including an aluminum foil and a synthetic resin film that are laminated. Here, the spout protrudes by a predetermined length from a central portion of an upper side of the bag. 
     When such a spout-equipped bag is filled with, for example, a liquid material such as a soft drink, for example, a filling apparatus shown in JP-A-2001-328601 is used. The filling apparatus disclosed in JP-A-2001-328601 includes a bag holding member for holding the packaging bag at predetermined intervals in a circumferential direction on a turntable rotating intermittently. Then, with rotation of the turntable, a plurality of steps arranged in the circumferential direction of the turntable are sequentially performed. Examples of the steps includes a step of setting the packaging bag in the bag holding member, a step of printing a date of manufacture or the like, a step of filling the bag with the liquid material using a nozzle, a step of cleaning the outside of the mouth of the spout, a step of attaching the screw cap, and checking tightening of the screw cap. 
     With the filling apparatus of JP-A-2001-328601, all the steps are concentrated around the turntable. Then, all the steps are completed while going around the turntable. Further, when a small spout of a relatively small-capacity packaging bag is handled in each step, the turntable can be rotated while holding the spout by the bag holding member. This also has an advantage that position accuracy of the spout can be ensured. 
     SUMMARY 
     According to one embodiment of the present disclosure, a filling apparatus includes: a conveyor line configured to intermittently convey spout-equipped bags, which are suspended so that spouts protruding from one side of the spout-equipped bags, the bags being flat, are located on an upper side and the bags are located on a lower side, in a width direction of the suspended spout-equipped bags on a movement straight line; a printing apparatus disposed in the middle of the conveyor line and configured to print manufacturing information on the suspended spout-equipped bags; and nozzles configured to fill the suspended spout-equipped bags with a liquid material through the spouts. The conveyor line is further configured to convey the spout-equipped bags so that fronts of the spout-equipped bags directly face the printing apparatus. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIGS. 1A to 1F  show a spout-equipped bag  1 ; 
         FIG. 1A  is a front view; 
         FIG. 1B  is a side view; 
         FIG. 1C  is a perspective view; 
         FIG. 1D  shows a neck of a spout-equipped bag of another mode; 
         FIG. 1E  shows a cross-section of the neck; 
         FIG. 1F  shows a magazine; 
         FIG. 2  is a perspective view showing a schematic structure of a filling apparatus according to Example 1; 
         FIG. 3  schematically shows a side of a conveying device; 
         FIGS. 4A to 4N  show details of a conveyor line; 
         FIG. 4A  shows overlap of a multi-hook and hold bars; 
         FIGS. 4B to 4E  show a movement of the multi-hook; 
         FIGS. 4F to 4H  show a movement of the hold bars; 
         FIGS. 4I to 4N  show a relationship between the multi-hook and the neck with respect to the hold bars; 
         FIGS. 5A to 5J  show a movement in which the spout-equipped bag is loaded onto or unloaded from the conveyor line in a direction intersecting a movement straight line; 
         FIGS. 6A to 6C  show the conveyor line, a distribution facility, and a stack equipment; 
         FIGS. 7A to 7D  are diagrams for explaining filling weight measurement; 
         FIG. 8  is a perspective view showing the schematic structure of the filling apparatus according to Example 2; 
         FIG. 9  is a perspective view showing the schematic structure of the filling apparatus according to Example 3; 
         FIGS. 10A to 10D  are diagrams showing a modification of a screw cap supply apparatus and the like; 
         FIGS. 11A and 11B  are diagrams showing the schematic structure of the filling apparatus according to Example 4; 
         FIG. 11A  is a perspective view; 
         FIG. 11B  is a diagram for explaining a movement; 
         FIGS. 12A and 12B  are diagrams showing a mechanism for removing the screw cap from the driver, and each of them shows an example; 
         FIGS. 13A and 13B  are diagrams showing a mechanism for opening and closing a nozzle, and each of them shows an example; and 
         FIG. 14  is a diagram showing an example of a link mechanism for realizing movement of the multi-hook. 
     
    
    
     DETAILED DESCRIPTION 
     In the following detailed description, for purpose of explanation, numerous specific details are set forth in order to provide a thorough understanding of the disclosed embodiments. It will be apparent, however, that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are schematically shown in order to simplify the drawing. 
     According to JP-A-2001-328601, when operations such as filling and screw cap tightening are performed, a spout-equipped bag is held by a bag holding member of a turntable. In intermittent conveyance using the turntable, the spout-equipped bag rotates in its width direction. Therefore, centrifugal force acts in a thickness direction of the bag. Therefore, the spout-equipped bag swings a lot. In such a case, when printing manufacturing information such as a best-before date, an interval between a head of a printing apparatus and the spout-equipped bag is not stable. Therefore, control of print quality is difficult. Further, when measuring a weight, if the spout-equipped bag is swinging in a radial direction, measurement accuracy is degraded. On the other hand, if the weight is measured after waiting for swinging to stop, production efficiency per unit time falls. 
     Further, in JP-A-2001-328601, two juxtaposed spout-equipped bags to be processed are processed. Apparatuses for performing each step always only from the outer peripheral side are arranged around the turntable. Further, the same steps are arranged side by side in parallel processing. There is a limit to a space in which the apparatuses can be placed around the turntable. Adding more apparatuses is difficult. Further, when unloading the spout-equipped bag after the steps are completed, the bag can only be unloaded toward the outer peripheral side. There is a waste of installation space in a factory machine layout. Furthermore, the holding member of the turntable unloads the filled spout-equipped bag and then receives an empty spout-equipped bag. Therefore, dirt scattered in a cleaning step accumulates directly on the holding member to contaminate a new spout-equipped bag. 
     The filling apparatus according to one embodiment of the present disclosure has been developed in view of the above-described conventional problems. An object of the present disclosure is to provide the filling apparatus that can stably convey the spout-equipped bag by reducing the swinging of the spout-equipped bag intermittently conveyed in the filling machine. This filling apparatus can reduce time required for stationary and improve the production efficiency. 
     According to one embodiment of the present disclosure, a filling apparatus includes: a conveyor line configured to intermittently convey spout-equipped bags, which are suspended so that spouts protruding from one side of the spout-equipped bags, the bags being flat, are located on an upper side and the bags are located on a lower side, in a width direction of the suspended spout-equipped bags on a movement straight line; a printing apparatus disposed in the middle of the conveyor line and configured to print manufacturing information on the suspended spout-equipped bags; and nozzles configured to fill the suspended spout-equipped bags with a liquid material through the spouts. The conveyor line is further configured to convey the spout-equipped bags so that fronts of the spout-equipped bags directly face the printing apparatus. 
     According to the present embodiment, a conveying direction by the conveyor line is linear. Therefore, even if a filling process is multiplexed or complicated, it can be handled by merely changing a length of the conveyor line. Therefore, expansion of each processing apparatus is easy. Further, a final end of the conveyor line is open. Therefore, when the spout-equipped bag is unloaded after the steps are completed, the spout-equipped bag can be unloaded in either direction. 
     According to the present embodiment, the spout-equipped bag is conveyed in the width direction of the bag on at least a part of the conveyor line. Therefore, the front of the spout-equipped bag directly faces the printing apparatus. Thus, the swinging of the spout-equipped bag conveyed is small. Thus, the interval between the spout-equipped bag and the printing apparatus is stable. Therefore, variation of character quality of printing is suppressed. In addition, the interval between the spout-equipped bag and the camera is also stable. Therefore, disturbance of a captured image is also small. 
     According to the present embodiment, a multi-hook only reciprocates a predetermined distance. Therefore, there is an effect that contamination is not moved upstream of the conveyor line. Further, the motion of the spout-equipped bag is linear. Therefore, operation management is easier. There is an effect that the swinging due to the centrifugal force is small, and further the spout-equipped bag can be stably conveyed. 
     A specific embodiment of the present disclosure will be described with reference to the drawings below.  FIG. 1A-F  show a spout-equipped bag  1 .  FIG. 1A  is a front view.  FIG. 1B  is a side view.  FIG. 1C  is a perspective view. Before the filling, the spout-equipped bag  1  is folded to be substantially flat. A spout  2  protrudes from an upper side of the bag  3  on an extension of a plane of the bag. In the present Example, the thickness direction of the bag  3  is defined as a “thickness direction a 1  of the bag  3 ”. A direction perpendicular to a longitudinal direction of the spout  2  and the thickness direction a 1  of the bag  3  is defined as a “width direction a 2  of the bag  3 ”. In a portion of the spout  2  protruding from the bag  3 , three radially extending flanges  21 ,  22 , and  23  are arranged at predetermined positions in order from the top. The lowermost flange  23  is at a position of an upper end of the bag  3 . The flange  23  positions the spout  2  and the bag  3 . On the upper side of an uppermost flange  21 , a male screw  24  with which a screw cap  25  is screwed is provided. When the spout-equipped bag  1  is handled, end edges  31  and  32  of a rail-like magazine  30  of C-shaped cross-section generally fit onto a neck  26  formed between the uppermost flange  21  and a middle flange  22  of the spout  2  of the spout-equipped bag (see  FIG. 1F ).  FIG. 1F  shows a typical delivery form from a bag manufacturer.  FIG. 1D  is the neck of another form of spout-equipped bag  1 . This spout-equipped bag  1  has two flanges  21  and  22 . Besides this, it is also possible to use a type of spout with only one flange. Description of this type of spout will be omitted. 
     The neck  26  can have various cross-sections. The bag  3  has opposite sides  26   a  and  26   b  parallel to each other in the thickness direction a 1 . Further, the opposite sides  26   a  and  26   b  have the same length. The cross-section of the neck  26  has a shape inscribed in a rectangle having a pair of opposite sides respectively parallel to the thickness direction a 1  and the width direction a 2  of the bag  3 . An upper edge seal portion  33  bonds upper edges of the bag  3  to each other. The upper edge seal portion  33  also bonds the spout  2  and the bag  3 . The opposite sides  26   a  and  26   b  of the neck  26  abut the end edges  31  and  32  of the magazine  30 . Thus, the spout-equipped bag  1  can be aligned in the same direction with respect to the magazine  30 . In addition to the neck  26  between the uppermost flange  21  and the middle flange  22 , a neck  27  is also provided between the middle flange  22  and the lowermost flange  23 . The neck  27  also has opposite sides  27   a  and  27   b  parallel to the thickness direction a 1  of the bag  3 . Moreover, the opposite sides  27   a  and  27   b  have the same length.  FIG. 1E  shows cross-sectional shapes of the necks  26  and  27  of  FIG. 1B , on the upper left side and lower left side of  FIG. 1E . Further,  FIG. 1E  shows the cross-sectional shapes of the necks  26  and  27  of  FIG. 1D , on the upper right side and lower right side of  FIG. 1E . These cross-sectional shapes often differ from each other. However, these cross-sectional shapes are common in that they are inscribed in the rectangle having the pair of opposite sides respectively parallel to the thickness direction a 1  and the width direction a 2  of the bag  3 . The neck  26  below the flange  21  shown on the left side in  FIG. 1E  is the same as the neck  26  shown on the right side. However, the neck  27  below the flange  22  shown on the right side of  FIG. 1E  is a bonding portion in which the bag  3  and the spout  2  are adhered to each other in an airtight and watertight manner. This neck  27  has a gentle cross-section. 
     Example 1 
       FIG. 2  is a perspective view showing a schematic structure of a filling apparatus  100  according to Example 1. The filling apparatus  100  has a machine base  101  provided with a conveyor line  110  which intermittently conveys the spout-equipped bag  1  on a movement straight line TL (indicated by a one-dot chain line). The movement straight line TL refers to an imaginary line extending in the direction in which the spout-equipped bag  1  is conveyed. In no case the movement straight line TL represents any specific section or range. The spout-equipped bag  1  is suspended such that the spout  2  is positioned above the bag  3  in a posture in which the width direction a 2  of the bag  3  is along the movement straight line TL while being conveyed. The conveyor line  110  conveys the spout-equipped bag  1  from right to left in the figure as indicated by an arrow in the figure. Details of the structure of the conveyor line  110  will be described below. 
     A bag supply apparatus  120  provided at the uppermost stream of the conveyor line  110  supplies the spout-equipped bag  1  onto the conveyor line  110 . In the present Example, the two juxtaposed spout-equipped bags  1  are supplied from the bag supply apparatus  120  to the conveyor line  110 . The conveyor line  110  performs the intermittent conveyance including a repetition of movement of conveying the two spout-equipped bags  1  to a next step and stopping the movement. In each step, the two juxtaposed spout-equipped bags  1  are processed. Therefore, in each step except printing/inspection, two working devices are arranged side by side. 
     In the printing and inspection step  130 , the manufacturing information (manufacturing factory number, manufacturing number, manufacturing date, best-before date, or the like) is printed on the front of the bag  3  (an area BL in  FIG. 1A ) by a printing apparatus  131  such as an ink jet printer. The spout-equipped bag  1  is conveyed on the conveyor line  110  in the width direction a 2  of the bag  3 . The spout-equipped bag  1  is conveyed along the conveyor line  110  so that the front of the bag  3  directly faces the head of the printing apparatus  131 . When the printing apparatus  131  prints, for example, N×M dot characters, a vertical row including N dots is first printed. Then, the spout-equipped bag  1  is conveyed sideways by one dot. Then, a vertical row including the next N dots is printed. Such printing is repeated M times to print dot characters. Print results are inspected for the presence or absence of printing defects such as blurring or misalignment by imaging the print results by a camera  132 . The camera  132  also directly faces the front of the spout-equipped bag  1  conveyed in the width direction a 2  of the bag  3 . The printing by the printing apparatus  131  and imaging by the camera  132  are performed on the spout-equipped bag  1  conveyed in the width direction a 2  of the bag  3 . Since the spout-equipped bag  1  is conveyed in the width direction a 2  of the bag  3 , the swinging due to conveyance of the spout-equipped bag  1  is small. That is, the upper edge seal portion  33  bonding the spout  2  and the bag  3  has high rigidity. Therefore, when the spout-equipped bag  1  is conveyed in the width direction a 2  of the bag  3 , the spout-equipped bag  1  conveyed is less likely to swing. In contrast, when the spout-equipped bag  1  is conveyed in the thickness direction a 1  of the bag  3 , the spout-equipped bag  1  easily swings around the sealed upper edge. The interval between the spout-equipped bag  1  and the printing apparatus  131  or the camera  132  is stable. Therefore, the variation of the character quality of the printing is suppressed. Further, the disturbance of the captured image is also suppressed. Moreover, two adjacent spout-equipped bags  1  can be simultaneously operated on the conveyor line  110  with a set of printing apparatus  131  and camera  132 . Further, the printing apparatus  131  and the camera  132  are integrally installed as a printing-and-inspection unit  133 . Therefore, change of installation position is easy. Further, information such as character density, size, and position is acquired by the camera  132 . By feeding back this information to the printing apparatus  131 , automatic control can be performed so that the printing on the spout-equipped bag  1  is always performed optimally. 
     In a filling step  140 , a tip of a nozzle  141  is pressed against the spout  2  of the spout-equipped bag  1 . In this way, the nozzle  141  and the spout-equipped bag  1  communicate with each other. Then, air in the bag  3  is once sucked out. Then, a predetermined amount of the liquid material (a filling object) is filled from a storage tank  142 . Further, inert gas is replenished. A constant pressure is applied to the storage tank  142  so that the liquid material is pushed out toward the nozzle  141 . An electromagnetic flow meter  144  for measuring a flow rate of the liquid material is inserted in the middle of a path  143  from the storage tank  142  to the nozzle  141 . The electromagnetic flow meter  144  outputs the measured flow rate as the number of pulses. Further, a sensor  145  for detecting a temperature of the liquid material is provided in the middle of the path  143 . 
     In the cleaning step  150 , spraying of cleaning solution and air is performed. An outer surface of the spout  2  is cleaned. In the cleaning step  150 , the spout-equipped bag  1  stops twice to perform cleaning by a nozzle  151  for blowing out the cleaning solution and drying by a nozzle  152  for blowing out the air. A liquid dish container  153  is provided below the conveyor line  110  from the filling step  140  to the cleaning step  150 . Thus, scattering of the overflowing liquid material or the cleaning solution is suppressed. 
     In the sealing step  160 , the screw cap  25  is attached to the spout-equipped bag  1  at three stop positions. In a first stop position, the screw cap  25  is supplied from a screw cap supply apparatus  161  to the spout-equipped bag  1 . Two-system screw cap supply apparatuses  161  are provided in advance so that a size of the screw cap can be selected. In the next stop position, pre-tightening by a driver  165  is performed. In the pre-tightening, while the screw cap  25  is rotating for a predetermined amount or for a predetermined time, a female screw of the screw cap  25  is roughly screwed into the male screw  24  provided on the spout  2 . After the pre-tightening, the spout-equipped bag  1  is fully tightened by a driver  166 . In final tightening, the screw cap  25  further rotates to tighten the screw cap  25 . If the pre-tightening and the final tightening are performed in one step, a range of idle rotation varies in a first rotation of the pre-tightening. Therefore, time of pre-tightening is not constant. As a result, it is necessary to keep a process time longer in order to secure the time for performing the final tightening. However, in the present Example, the pre-tightening and the final tightening are performed at different positions. Thus, the time with little variation which can be used for the final tightening can be secured. Therefore, the process time can be shortened. 
     In the weight measurement step  170 , a weight of the filled spout-equipped bag is measured by a weighing scale  171 . Thereafter, in an unloading step  180 , the spout-equipped bag is unloaded to an unloading conveyor  182  by a sorting machine  181 . Or, in the case of a defective product, the spout-equipped bag is collected in a collection box  183 . 
     (Conveyor Line) 
       FIGS. 4A to 4N  show details of the conveyor line  110 . The conveyor line  110  has a multi-hook  111  and hold bars  112 .  FIG. 4A  is a cross-sectional view showing overlap of the multi-hook  111  and the hold bars  112 . The hold bars  112  fit onto the lower neck  27  from both the front and back sides of the spout-equipped bag  1 .  FIGS. 4B to 4E  show a movement of the multi-hook  111 .  FIGS. 4F to 4H  show a movement of the hold bars  112 . In these figures, a hatched rectangle indicates the rectangle in which the cross-section of the neck  26  or  27  of the spout-equipped bag  1  is inscribed. 
     The multi-hook  111  fits onto only one of the front and back of the spout-equipped bag  1 . A plurality of hooks  111   a  are provided at equal intervals along a long side on one side of a straight main body of the multi-hook  111 . Each of the hooks  111   a  has a cutout shape fitting onto the upper neck  26  and suspends the spout-equipped bag  1 . The multi-hook  111  moves by a distance by which the spout-equipped bag  1  is intermittently conveyed such that the plurality of hooks  111   a  move along the movement straight line TL in which the spout-equipped bag  1  is conveyed. Thereafter, the multi-hook  111  departs from the movement straight line, bypasses the movement straight line TL, and returns to an original position along the movement straight line TL. When the multi-hook  111  departs from the movement straight line TL, it cooperates with the hold bars  112  to release the spout-equipped bag  1 . When the multi-hook  111  returns, it cooperates with the hold bars  112  to suspend the spout-equipped bag  1  by the hooks  111   a . n times the distance between adjacent hooks  11   a  corresponds to an intermittent moving distance of the multi-hook  111 , that is, an intermittent conveying distance of the spout-equipped bag  1 . The n is the number of plural juxtaposed spout-equipped bags  1  to be processed. In the case of conveying two juxtaposed spout-equipped bags  1 , the multi-hook  111  moves by twice the distance between the hooks  111   a . The n is a positive integer. 
     The hold bars  112  are provided along the main body of the multi-hook  111 . The hold bars  112  sandwich the lower neck  27  of the stopping spout  2  from both sides thereof. Further, the hold bars  112  have a function of holding the spout-equipped bag  1  in order to suppress a change in behavior of the spout-equipped bag  1  during the operation while the intermittent movement is stopped. Due to this holding function, when the spout-equipped bag  1  stops in the intermittent movement, the hold bars narrow their interval and sandwich the spout. Places for holding the spout, which are referred to as “holds”, are provided at equal intervals respectively corresponding to places of stopping of the intermittent movement. In the present Example, a cutout-shaped hold  112   a  is provided on one side (or on both sides) of the hold bars  112 . The neck  27  of the spout-equipped bag  1  is enclosed and sandwiched in the hold  112   a . The hold  112   a  is provided corresponding to the stop position of the intermittent movement. 
       FIGS. 4I to 4K  show a relationship of the necks  26  and  27  to the multi-hook  111  and the hold bars  112 . In  FIG. 4F , it is assumed that there is the spout-equipped bag at a position p 0 . In  FIG. 4B , the multi-hook  111  has returned to the original position along the movement straight line TL. Thus, the spout-equipped bag  1  is suspended by the multi-hook  111 . The neck  26  at this time is in a state shown in  FIG. 4I . Thereafter, the hold bars  112  extend the interval. In  FIG. 4C , the multi-hook  111  move along the movement straight line TL. In  FIG. 4G , the spout-equipped bag  1  moves between the hold bars  112 . The necks  26 ,  27  at this time are in a state shown in  FIG. 4J . When the movement of the multi-hook  111  on the movement straight line TL is stopped, the hold bars  112  narrow the interval and hold the spout-equipped bag  1 . The necks  26  and  27  at this time are in a state shown in  FIG. 4K . In  FIG. 4D , the multi-hook  111  departs from the movement straight line TL. At this time, the spout-equipped bag  1  is obtained by the hold  112   a . In  FIG. 4E , the multi-hook  111  return to the original position as shown in  FIG. 4B  via a bypass path. 
       FIGS. 4L and 4M  show a relationship between the multi-hook  111 , the hold bars  112 , and necks  28 ,  29  of the spout-equipped bag  1  having two flanges.  FIG. 4I  corresponds to  FIG. 4L . Thereafter, the hold bars  112  extend the interval. In  FIG. 4M , the spout-equipped bag  1  moves between the hold bars  112 . When the movement of the multi-hook  111  on the movement straight line TL is stopped, the hold bars  112  narrow the interval and hold the spout-equipped bag  1 . The necks  28  and  29  at this time are in the state shown in  FIG. 4N . Note that the hold  112   a  is preferably a cutout corresponding to the neck  29 . It is preferable that the multi-hook  111  be disposed just below the flange of spout-equipped bag  1  having one flange, and further, the hold bars  112  are arranged below the multi-hook  111 . 
     The multi-hook  111  sequentially conveys the spout-equipped bag  1  downstream of the conveyor line  110  by reciprocating motion. Therefore, a range in which the hooks  111   a  of the multi-hook  111  located in the cleaning step  150  move is fixed. Therefore, the dirt scattered in the cleaning step  150  is restrained from moving upstream of the conveyor line  110  and accumulating. As a result, the contamination of the empty spout-equipped bag  1  received from the bag supply apparatus  120  is avoided. In this way, as an effect generated by conveying the spout-equipped bag  1  on the movement straight line TL, first, a printing defect caused by the dirt adhering to the spout-equipped bag  1  is avoided. When the dirt adheres to a predetermined printing portion and the printing is performed there, falling out of print tends to occur. However, the filling apparatus of the present Example can suppress the falling out of print. Further, for example, time for cleaning is less than that of a general turntable filling machine. Furthermore, it is also avoided to take measures to restrain contamination range from extending. 
       FIGS. 5A to 5J  show movement of loading the spout-equipped bag  1  onto the conveyor line  110  ( FIGS. 5A to 5E ) or movement of unloading the spout-equipped bag  1  from the conveyor line  110  ( FIGS. 5F to 5J ), in a direction intersecting the movement straight line TL. In the figures, the hold bars  112  are indicated by broken lines. 
     In  FIG. 5A , the spout-equipped bag  1  is conveyed on a transfer rail  41  to a vicinity of the conveyor line  110 . A delivery device  42  delivers the spout-equipped bag  1  on the transfer rail  41  to the conveyor line  110 . The delivery device  42  uses an arm  43  to push out the spout-equipped bag  1  from behind to mount the bag on the multi-hook  111  of the conveyor line  110 . Thereafter, the delivery device  42  releases the arm  43  ( FIG. 5B ). The multi-hook  111  moves along the movement straight line TL to mount the neck  27  of the spout-equipped bag  1  on the hold bars  112  ( FIG. 5C ). Then, as shown in  FIGS. 5D and 5E , the multi-hook  111  departs from the movement straight line TL. Thereafter, the multi-hook  111  return to the position shown in  FIG. 5A  via the bypass path. 
     In  FIG. 5F , the delivery device  52  delivers the spout-equipped bag  1  located on the most downstream of the conveyor line  110  to a transfer rail  51 . The delivery device  52  uses an arm  53  to push out the spout-equipped bag  1  stopped in front of the transfer rail  51  from behind ( FIG. 5F ), and mounts the bag on the transfer rail  51  ( FIG. 5H ). Thereafter, the delivery device  52  operates to release the arm  53  ( FIG. 5I ). On the other hand, as shown in  FIGS. 5G and 5H , the multi-hook  111  departs from the movement straight line TL. Thereafter, the multi-hook  111  return to the position shown in  FIG. 5I  via the bypass path. Then, the multi-hook  111  suspends the next spout-equipped bag  1 . The multi-hook  111  moves the next spout-equipped bag  1  on the movement straight line TL ( FIG. 5J ), and stops in front of the transfer rail  51 . 
     (Bag Supply Apparatus) 
     Returning to  FIG. 2 , the bag supply apparatus  120  has a conveying device  121 , a robot  122 , a transfer rail  123 , a sending-out device  124 , and a delivery device  125 . Note that only the transfer rail  123  and the delivery device  125  corresponding to the spout-equipped bag  1  taken out on the back side of the drawing are shown. The transfer rail and the delivery device arranged on the front side of the drawing are omitted. The conveying device  121  has a structure including a pair of endless chains  121   a  stacked hierarchically. Each pair of endless chains  121   a  carries a plurality of magazines  30  shown in  FIG. 1F  in a bridging manner. The pair of endless chains  121   a  is intermittently cyclically driven by a sprocket  121   b .  FIG. 3  schematically shows a side of the conveying device  121 . Each pair of endless chains  121   a  is provided with a frame  121   c  for positioning the magazines  30 . An operator can set the plurality of magazines  30  in the conveying device from the right side of the drawing. The pair of endless chains  121   a  rotates counterclockwise in the drawing. 
     Returning to  FIG. 2 , the robot  122  picks up the magazines  30  on the endless chains  121   a  and sets them in the sending-out device  124 . When the magazines  30  are picked up, the pair of endless chains  121   a  moves the new magazines  30  to the final end and stops them. The robot  122  can obtain the magazines  30  from the endless chains  121   a  on any stage. 
     The sending-out device  124  transfers the spout-equipped bag  1  to the transfer rail  123  from the magazine  30  set by the robot  122 . The sending-out device  124  can move a pushing member  124   a  in a direction of the conveyor line  110  by a linear sliding air cylinder (not shown). The pushing member  124   a  transfers the spout-equipped bag  1  to the transfer rail  123  existing on an extension of the magazine  30  by pushing the back of the spout-equipped bag  1  held in the magazine  30 . In the present Example, two magazines  30  are set in the sending-out device  124  by the robot  122 . The spout-equipped bags  1  are taken out in parallel from the magazines. Thus, the pushing member  124   a  simultaneously pushes the back of two rows of spout-equipped bags  1  held in the two magazines  30 . Correspondingly, two transfer rails  123  parallel to each other are arranged. 
     The transfer rail  123  is vibrated by a vibration device (not shown) to convey the spout-equipped bag  1  to the uppermost stream of the conveyor line  110 . The transfer rail  123  is inclined slightly downward toward the conveyor line  110  side. First and second stoppers (not shown) which can be advanced and retracted are provided near an end of the conveyor line  123  on the conveyor line  110  side. These stoppers contact a leading bag and a second bag to temporarily stop their advance. The delivery device  125  delivers the leading spout-equipped bag  1  on the transfer rail  123  to the conveyor line  110 . The conveyor line  110  is perpendicular to the transfer rail  123 . Therefore, a conveyance direction of the spout-equipped bag  1 , which has been conveyed on the transfer rail  123  in the thickness direction a 1  of the bag  3 , is converted to the width direction a 2  of the bag  3 , after the spout-equipped bag  1  is transferred to the conveyor line  110  by the delivery device  125 . 
     (Spout Wash) 
     In the cleaning step  150 , spraying of the cleaning solution and the air is performed. Thus, the outer surface of the spout  2  is cleaned.  FIG. 10B  shows the spraying of the cleaning solution by the nozzle  151  and the air by the nozzle  152 . The spout  2  protruding above the conveyor line is surrounded by shells  154  and  155 . Then, inside of the shells  154  and  155  is sucked. Thus, the cleaning solution and the blown air are recovered. When the cleaning solution is scattered, a spot where the scattered cleaning solution adheres becomes a growth source of bacteria. In addition, if the scattered cleaning solution adheres to the printing apparatus, a failure occurs in the printing apparatus. 
     (Screw Cap Supply Apparatus) 
     The screw cap  25  is conveyed from the screw cap supply apparatus  161  toward the spout-equipped bag. A part of a conveyor path is a pipe conduit  162 . The screw cap  25  is blown into the pipe conduit  162  by the air from an inlet side of the pipe conduit  162 . Further, the pipe conduit  162  is vibrated by a vibrator (not shown). The screw cap  25  advances due to the vibration. In this way, the screw cap  25  is supplied to the spout  2  while the intermittent movement is stopped. Instead of advancing the screw cap  25  by the vibration, a negative pressure source  167  may be provided on an outlet side of the pipe conduit  162  as a pipe conduit  163  covering the whole way to the spout as shown in  FIG. 10A . A mesh  164  is a mesh-like member which allows the sucked air to pass therethrough. When the screw cap  25  is conveyed by the air, even if the dust is sent out from inside the screw cap supply apparatus  161 , the dust passes through the mesh  164  and is discharged from the negative pressure source  167 . The negative pressure source  167  has a function of assisting the movement of the screw cap  25  in the pipe conduit  162 . 
     (Screw Cap Tightening Inspection) 
     In the final tightening, the driver  166  detects a final torque value when the screw cap  25  is tightened on the spout  2  and a tightening position of the screw cap  25  on the spout  2 . The driver  166  is rotationally driven by a servomotor. A current value can be obtained as information indicating the torque value. Further, the number of drive pulses can be obtained as information indicating a rotation angle. The spout  2  and the screw cap  25  are members made of synthetic resin. A mold used to mold the members wear after prolonged use. Therefore, a slight change occurs in a shape of the molded spout  2  or screw cap  25 . The spout-equipped bag  1  is filled with the liquid material and then stored for a relatively long time. Therefore, if there is a slight gap in screwing between the spout  2  and the screw cap  25 , the contents may be rotted by entry of outside air during a storage period. When the spout  2  or screw cap  25  having a changed shape is screwed, the tightening torque value or the stop position of the screw cap  25  changes. Therefore, storing the torque values and stop positions as log data in a controller (not shown) is effective in investigating a cause of failure when a defect is found. 
       FIG. 10C  and  FIG. 10D  show an example of a step of performing the final tightening. The final tightening is controlled by the controller (not shown). A flow of  FIG. 10D  is a process flow including the steps by the controller. The controller obtains drive current of the driver  166  from a current measuring device (not shown). Further, the controller sends the drive pulse to the servomotor of the driver  166 . In a process flow S 1 , the controller obtains a drive current value of the driver  166  during rotation. Then, the controller detects the obtained drive current value as a current torque value (current value of the driver  166 ). In the process flow S 1 , it is detected whether the current torque value has reached a predetermined torque value by comparing the current torque value with the predetermined torque value. In a process flow S 2 , a known pattern matching process is performed on the image of the camera  166   a . Specifically, it is detected whether a mark MK provided on the screw cap  25  has reached a predetermined rotational position. In a process flow S 3 , as a result of the pattern matching process, when the mark MK reaches the predetermined position, rotation of the driver  166  is stopped. The torque value is also detected from the drive current value at that time. In a process flow S 4 , counting of a counter in the controller is started after reaching the predetermined torque value. Thereafter, the controller counts up the counter each time the drive pulse is generated. When the predetermined rotational position is reached, the count value up to that point is detected as the rotation angle (the number of drive pulses of the driver  166 ). As the mark MK, for example, a cut of a proof band provided on the screw cap  25  in order to provide a tamper evidence (tamper proof) function can be used. It is determined whether a sealed state between the screw cap  25  and the spout  2  is acceptable based on the predetermined position at which the mark MK should originally stop. However, the rotation angle detected in S 4  may change due to influence of moisture adhering to the spout  2 . In preparation for such a case, both the torque value by the driver  166  and the stop position of the mark MK by the camera  166   a  are preferably detected and managed. Thus, the sealed state between the screw cap  25  and the spout  2  can be managed. Further, the detected torque value and rotation angle may be associated and stored in the controller or graphed. Thus, a central position of acceptance determination of the sealed state between the screw cap  25  and the spout  2  can be set or changed automatically or manually. In  FIG. 10D , the torque value when the rotation of the driver  166  is stopped and the stop position of the mark MK are displayed. However, the torque value when the rotation of the driver  166  is stopped and the rotation angle from the stop position of the mark MK to the predetermined rotational position may be displayed. 
     (Weight Measurement Process) 
     The weight of the filled spout-equipped bag  1  is measured by the weighing scale  171  as shown in  FIG. 7A . The hold bar  112  is divided at a position of the weighing scale  171 . A hold bar  113  connected to a balance of the weighing scale  171  is provided. As shown in  FIG. 7B , the weight of only the spout-equipped bag  1  held by the hold bar  113  is measured by the weighing scale  171 . A measuring hold  113   a  of the hold bar  113  is disposed in place of a part of the hold  112   a  disposed at equal intervals along the movement straight line TL. In the conveyor line  110 , a position of a center of gravity of the spout-equipped bag  1  filled with the liquid material is moved to below the spout. When the spout-equipped bag  1  stops at the position of the weighing scale  171 , the spout-equipped bag  1  is flexible in the thickness a 1  direction of the bag  3  and is hard in the width a 2  direction of the bag  3 . Further, the upper edge seal portion  33  also has high rigidity in the width a 2  direction of the bag  3 . Even if the position of the center of gravity is lowered, the swinging of the spout-equipped bag  1  is small when the spout-equipped bag  1  is stopped after intermittent conveyance on the movement straight line TL in the conveyor line  110 . Therefore, even when the weight is measured by the weighing scale  171  provided at a temporary stop position of the conveyor line  110 , a time until the swinging is stopped is extremely short. On the other hand, in the case of intermittent conveyance using a general turntable, the spout-equipped bag  1  is rotated in the width direction. Therefore, the spout-equipped bag  1  swings greatly due to the centrifugal force acting in the thickness direction of the bag  3 . Therefore, it takes a long time to wait for the swinging to stop. Or, the weight is measured while swinging. This reduces accuracy of weight measurement results. 
     In the present Example, as shown in  FIG. 7C , the flow rate (the number of pulses) is measured by the electromagnetic flow meter  144 . Further, the sensor  145  measures the temperature of the liquid material and a pressure value in the storage tank at that time. The data of the weight of each spout-equipped bag  1  is stored as log data in the controller (not shown) together with the flow rate (the number of pulses) that is measured by the electromagnetic flow meter  144 , or the temperature of the liquid material and the pressure value in the storage tank that time that are measured by the sensor  145 , at the time the spout-equipped bag  1  is filled. Since viscosity of the liquid material changes with temperature, the flow rate changes even at the same pressure. Therefore, in order to fill the bag with a predetermined weight, it is effective to save these data as a log. Further, as shown in  FIG. 7D , the weight value, the number of pulses, the temperature of the liquid material, and the pressure value in the storage tank of the spout-equipped bag  1  can be preferably displayed in association with each other. Further, the flow rate of the liquid material supplied from the storage tank may be adjusted so that the weight of the predetermined number of spout-equipped bags measured at time intervals matches a target value. Furthermore, the flow rate changes with the temperature of the liquid material. Therefore, the flow rate of the liquid material supplied from the storage tank may be adjusted according to the measured temperature of the liquid material. 
       FIGS. 6A to 6C  show the conveyor line  110 . In  FIG. 6A , the multi-hook  111  of Example 1 is continuous from the position in which the empty spout-equipped bag  1  is loaded onto the conveyor line  110  to the position in which it is finally unloaded from the conveyor line  110 . The intermittent conveyance distance is twice a spacing between the spout-equipped bags because double parallel transfer is performed (in the case of n-fold parallel transfer, it is n times the spacing between the spout-equipped bags. The n is a positive integer). Three spout-equipped bags  1  on the left side of the drawing indicate directions in which the bags are unloaded from the conveyor line. The spout-equipped bag  1  can be unloaded from the conveyor line  110  in any direction of upper, lower and left directions of the drawing. In this way, a degree of freedom of arrangement of the following sterilization step line can be improved. 
     Example 2 
       FIG. 8  shows an entire structure of a filling apparatus  200  of Example 2. In Example 1, the two juxtaposed spout-equipped bags are transferred from the bag supply apparatus  120  to the conveyor line  110 . In the conveyor line  110 , the two adjacent juxtaposed spout-equipped bags  1  are processed simultaneously. The filling apparatus  200  of the present Example takes out four spout-equipped bags  1  simultaneously from a bag supply apparatus  220 . The bags taken out are loaded on a conveyor line  210  and divided two by two by a branch facility  280 . Thereafter, the spout-equipped bags  1  are processed by the conveyor lines  211  and  212 . In each of the conveyor lines  211  and  212 , the two juxtaposed spout-equipped bags  1  are processed simultaneously. 
     The bag supply apparatus  220  of Example 2 has a plurality of holding rails  221   d  for accommodating a plurality of spout-equipped bags  1 . Each holding rail  221   d  has the C-shaped cross-section in the same manner as the magazine  30  shown in  FIG. 1F . The plurality of holding rails  221   d  are fixed to a conveyor  221   a  in a bridging manner. The spout-equipped bags  1  are separately transferred from the magazine  30  to the holding rail  221   d . The sending-out device  124  takes out the spout-equipped bags  1  from the holding rail  221   d  directly to the transfer rail  123 . When a structure for taking out the four spout-equipped bags  1  is compared with the bag supply apparatus of Example 1, the difference is only that the multiplicity of the transfer rail  123 , the sending-out device  124 , and the delivery device  125  that are included in the structure is increased. Therefore, further description of the above-described structure will be omitted. 
     The conveyor line  210  is provided with the branch facility  280  for distributing the spout-equipped bags  1  to the two conveyor lines  211  and  212 . In the conveyor line  210  between the bag supply apparatus  220  and the branch facility  280 , an operation of conveying the spout-equipped bags  1  in the width direction a 2  by a distance corresponding to the four spout-equipped bags  1  and stop them (quadruple parallel (2×2)) is repeated. Thus, the intermittent conveyance is performed. In each of the conveyor lines  211  and  212  downstream of the branch facility  280 , an intermittent conveyance operation of conveying the spout-equipped bags  1  by a distance corresponding to the two spout-equipped bags  1  and stop them (double parallel (2×1)) is repeated. Subsequent steps in each of the conveyor lines  211  and  212  are the same as in Example 1. If the number of parallel transfers on each of the conveyor lines  211  and  212  is n, the number of parallel transfers on the conveyor line  210  is 2×n. 
       FIG. 6B  shows a structure of the branch facility  280  (however, the figure shows a double parallel transfer mode (n=1 mode) instead of a quadruple parallel transfer for simplification). The branch facility  280  has a transfer rail  281  and a delivery device  282 . Moreover, the multi-hook is divided into a multi-hook  211   a  for performing the double parallel transfer having a movable range EX 1  and multi-hooks  211   b  and  211   c  for performing single parallel transfer having a movable range EX 2 . The ranges EX 1  and EX 2  partially overlap each other. The movement straight line of the multi-hook  211   a  overlaps the movement straight line of the multi-hook  211   b  when extended. Among the spout-equipped bags  1  obtained by the hold located at 2×n (here, n=1) at the most downstream of the multi-hook  211   a , the leading n pieces of bags are suspended by the multi-hook  211   b  performing single parallel transfer. The next n pieces of bags are sent to the conveyor line  212  by the transfer rail  281  and the delivery device  282  and suspended by the multi-hook  211   c.    
     Briefly explaining the operation, the intermittently conveyed two spout-equipped bags  1  stop at points p 1  and p 2  of the multi-hook  211   a . Next, the multi-hook  211   b  obtains the spout-equipped bag  1  at the point p 1  (first of the two). The delivery device  282  delivers the spout-equipped bag  1  at the point p 2  (remaining of the two) to the multi-hook  211   c  via the transfer rail  281 . 
     Example 3 
       FIG. 9  shows an entire structure of a filling apparatus  300  of Example 3. In Example 1, when the spout-equipped bag  1  is stopped at a stop point of the conveyor line  110 , it is filled with the liquid material. Therefore, it is necessary to complete the filling while the spout-equipped bag  1  is stopped. By pressing the tip of the nozzle  141  against the spout  2  of the spout-equipped bag  1 , the nozzle and the bag communicate with each other. In this way, the filling is performed by increasing the flow rate of the liquid material so that the liquid material does not spill out of the spout. In such a filling method, when the nozzle  141  is removed from the spout  2 , the liquid material may adhere to the outside of the spout  2 . Therefore, cleaning of the next step is necessary. 
     On the other hand, in the filling apparatus  300  of Example 3, a nozzle  345  is inserted into an inside of a mouth of the spout  2  of the spout-equipped bag  1  in a noncontact manner. Therefore, the bag can be filled with the liquid material slowly over time as compared with the former Example 1. Therefore, in the present Example, a filling step  340  includes a stack equipment  390  of the spout-equipped bags  1 . The spout-equipped bags  1  intermittently conveyed by a conveyor line  310  are temporarily stacked (accumulated) four times (for example, 2×4=8). Then, the filling is simultaneously started by nozzles  345  provided in plurality. When the filling is completed, the spout-equipped bags  1  are delivered to a downstream conveyor line  311 . For example, in the case of n-fold parallel transfer, m times n (m is a positive integer), that is, n×m spout-equipped bags  1  are stacked. The conveyor lines  310  and  311  upstream and downstream of the stack equipment  390  are the same as in Example 1. Therefore, a description thereof will be omitted. 
       FIG. 6C  is a diagram showing a structure of the stack equipment  390 . However, the figure shows an example in which four (m=2 double parallel transfer) spout-equipped bags are stacked instead of eight spout-equipped bags for simplification. The stack equipment  390  has a transfer rail  391  and delivery devices  392  and  393 . Hereinafter, an operation of the stack equipment  390  will be described. The four spout-equipped bags  1  stop at points p 3 , p 4 , p 5  and p 6  of the multi-hook  311   a  of the conveyor line  310  after the intermittent conveyance. The four spout-equipped bags  1  are respectively arranged at positions directly facing the four transfer rails  391 . Then, the spout-equipped bag  1  at each position is sent to a filling position by the delivery device  392 . By the time the filling is completed, the four spout-equipped bags  1  are again arranged at the points p 3 , p 4 , p 5  and p 6 . Therefore, the spout-equipped bags  1  after the filling is completed are moved to the multi-hook  311   b  of the conveyor line  311  by the delivery device  393 . On the other hand, the delivery device  392  moves the new spout-equipped bags  1  to positions waiting for filling. In the present Example, the number of transfer rails  391  is four. However, the number is generally n×m. 
     According to Examples 1 to 3 described above, the multi-hook only reciprocates the predetermined distance. Therefore, an effect is obtained that the contamination does not easily move upstream of the conveyor line. Further, the conveying direction of the spout-equipped bag  1  is linear in the width direction of the spout-equipped bag. Therefore, the operation management in inspection of the print results on the spout is improved. That is, when inspecting the printing by the camera, the camera images the spout-equipped bags  1  conveyed in parallel. Therefore, there is less false detection. In the case of the general turntable filling machine, it is difficult to image the spout-equipped bags  1  that is being conveyed in an unstable state being inclined by the centrifugal force. Therefore, it is necessary to capture the image after inclination of the spout-equipped bag  1  is eliminated after conveyance. However, in the present Example, the swinging due to the centrifugal force does not occur. That is, when the spout-equipped bag  1  is conveyed in the width direction a 2  of the bag  3 , the spout-equipped bag  1  that is being conveyed is less likely to swing because the upper edge seal portion  33  bonding the spout  2  and the bag  3  has a high rigidity. On the contrary, when the spout-equipped bag  1  is conveyed in the thickness direction a 1  of the bag  3 , the spout-equipped bag  1  easily swing around the upper edge seal portion. As described above, in the present Example, since the spout-equipped bag  1  is not inclined, it is possible to capture the image from the front even at the moment when the spout-equipped bag  1  is conveyed. 
     According to Examples 1 to 3 described above, the conveyor line is a straight line. Further, the steps are arranged on the straight line. Therefore, the number of spout-equipped bags that can be multiply arranged in parallel can be increased. Further, the spout-equipped bag  1  can be unloaded in a desired direction after the steps are completed. Furthermore, the spout-equipped bag can be conveyed according to an equal interval between the hooks. Therefore, by setting a position of each step according to this interval, an effect of ensuring accurate conveyance can be obtained. In Examples 1 to 3 described above, the hook  111   a  fitted onto the neck  26  on the upper side of the spout-equipped bag  1  is the cutout. However, the hook  111   a  may have a mechanism for picking the neck  26 . 
     Example 4 
       FIGS. 11A and 11B  show a structure of a filling apparatus  400  of Example 4. In Example 1, the conveyor line  110  conveys the spout-equipped bag  1  in the width direction of the spout-equipped bag  1  on the whole way from the bag supply apparatus  120  to the sorting machine  181  for unloading the spout-equipped bag  1 . On the other hand, in the filling apparatus  400  of Example 4, a direction conversion portion  135  is provided between the printing apparatus  131  and the nozzle  141  along the movement straight line TL of the conveyor line  110 . The direction conversion portion  135  converts the conveying direction of the spout-equipped bag  1  from the width direction a 2  of the spout-equipped bag  1  to the thickness direction a 1  of the spout-equipped bag  1 . Hereinafter, the conveyor line  110  on the printing apparatus  131  side is referred to as a conveyor line  110   a , and the conveyor line  110  on the nozzle  141  side is referred to as a conveyor line  110   b . As shown in  FIG. 11B , a conveyor pitch d 1  of the conveyor line  110   a  and a conveyor pitch d 2  of the conveyor line  110   b  are different from each other. The conveyor pitch d 2  of the conveyor line  110   b  is shorter than the conveyor pitch d 1  of the conveyor line  110   a . The direction conversion portion  135  has two arms  135   a  (depending on the multiplicity of processing of the spout-equipped bag  1 ). The spout-equipped bag  1  is picked up from the conveyor line  110   a  rotated 90 degrees, and transferred to the conveyor line  110   b  by each arm  135   a.    
     According to Example 4, it is not necessary to match the conveyor pitch with the width of the spout-equipped bag  1  in the whole way of the conveyor line  110 . Therefore, even in the case of processing a wide spout-equipped bag  1 , it is possible to construct an apparatus including a shorter conveyor line  110 . 
       FIGS. 12A and 12B  show a mechanism for removing the screw cap  25  from the driver  165  or  166 . The screw cap  25  hardly remains in the driver  165  or  166 . However, in rare cases, the cap tightening fails, and the screw cap  25  remains in the driver  165  or  166 . Then, the cap of the spout-equipped bag  1  cannot be tightened thereafter. As a result, defective products are produced until a manager notices the failure. 
     As shown in  FIG. 12A , the driver  165  or  166  transfers a pressing force by a cylinder  168  provided on a rear side thereof to a top of the screw cap  25  via a push rod  168   a  penetrating an axial center of the driver  165  or  166 , to remove the screw cap  25 . The push rod  168   a  is retracted at the time of cap tightening and is pushed out when the cap tightening is completed. 
     As shown in  FIG. 12B , a spring rod  169  removes the screw cap  25 . The spring rod  169  usually protrudes. However, when the spring rod  169  is pressed against the screw cap  25  by the driver  165  or  166 , the spring rod  169  retracts to store a restoring force. When the driver  165  or  166  finishes cap tightening and loses the force pressing the screw cap  25 , the restoring force stored in the spring rod  169  is generated. Then, the screw cap  25  is removed. 
       FIGS. 13A and 13B  show a mechanism for opening and closing the nozzle  141 . Generally, the nozzle  141  opens and closes a valve  141   a  by an air cylinder  141   b . However, since an opening and closing speed is uneven, it is a problem that a filling amount varies. By using a gear  141   d  for converting a rotational motion of a servomotor  141   c  into a linear motion, it is possible to reduce unevenness in the opening and closing speed. 
       FIG. 14  shows an example of a link mechanism for realizing the movement of the multi-hook  111  of the conveyor line  110 . The multi-hook  111  departs from the movement straight line after moving by the predetermined distance along the movement straight line TL. Then, the multi-hook  111  bypasses the movement straight line TL and return to the original position along the movement straight line TL. A rotary motor is used as a power source for such movement. However, in general, this mechanism has a constant number of revolutions per unit time. A time required for the multi-hook  111  to move on the movement straight line TL and a time required for the multi-hook  111  to return to the original position after leaving the movement straight line TL have to be the same because the number of revolutions of the rotary motor is constant. 
     The spout-equipped bag  1  which is heavy and has a low rigidity may be processed in some cases. The multi-hook  111  carries the spout-equipped bag  1  which is heavy and has a low rigidity when moving along the movement straight line TL. Therefore, the multi-hook  111  preferably moves over time in order to suppress the swinging of the bag. On the other hand, when the multi-hook  111  returns, the multi-hook  111  do not carry the spout-equipped bag  1 . Therefore, the multi-hook  111  preferably moves in a short time. In the example of  FIG. 14 , a pulse motor  195  is used as the motor. The pulse motor  195  is provided with a rotational position detection device  195   a . When the pulse motor  195  reaches the predetermined rotational position, a signal is emitted. The controller (not shown) of the pulse motor  195  changes a frequency of the drive pulse generated per unit time in one revolution. That is, the controller controls the frequencies so that the frequency while the multi-hook  111  departs from the movement straight line TL and returns to the original position is set higher than the frequency while the multi-hook  111  is moving along the movement straight line TL. As a result, it is possible to move the multi-hook  111  slowly when moving along the movement straight line TL and in a short time when returning to the original position. In  FIG. 14 , g 1  and g 2  are fixed ends of the link. f 1 , f 2  and f 3  are free ends of the link. The pulse motor  195  applies a rotational force to the fixed end g 1 . 
     The filling apparatus according to the embodiment of the present disclosure may be any one of the following first to ninth filling apparatuses. 
     The first filling apparatus includes: the conveyor line for intermittently conveying the spout-equipped bag along the movement straight line by suspending the spout protruding from one side of the flat empty spout-equipped bag on an extension of a plane of the bag so that the bag is positioned on a lower side; the printing apparatus for printing the manufacturing information on the empty spout-equipped bag which is disposed in the middle of the conveyor line and conveyed by the conveyor line; the nozzle for filling the liquid material through the spout into the empty spout-equipped bag which is disposed in the middle of the conveyor line and printed by the printing apparatus; and the driver for sealing with the screw cap the spout of the spout-equipped bag which is disposed in the middle of the conveyor line and filled by the nozzle. The conveyor line conveys the spout-equipped bag in front of the printing apparatus in the width direction of the spout-equipped bag, so that the front of the spout-equipped bag directly faces the printing apparatus. 
     The second filling apparatus is the first filling apparatus, further including a camera for checking whether the printing has been successfully performed. The conveyor line conveys the spout-equipped bag in front of the camera in the width direction of the spout-equipped bag, so that the front of the spout-equipped bag directly faces the camera. 
     The third filling apparatus is the first filling apparatus, including the weighing scale for measuring the weight of the spout-equipped bag which is disposed in the middle of the conveyor line and filled with the liquid material. The third filling apparatus corrects the flow rate from the nozzle based on the weight measured by the weighing scale. 
     The fourth filling apparatus is the first filling apparatus, wherein the conveyor line includes the multi-hook and a large number of holds. The multi-hook has a large number of hooks provided at equal intervals along the movement straight line for suspending the spouts, and moves the spout-equipped bags on the movement straight line by n times (n is a positive integer) the interval between the adjacent hooks in a state in which the spout-equipped bags are suspended so that the width direction of the spout-equipped bags matches the direction of the movement straight line, and then departs from the movement straight line, bypasses the movement straight line, and returns each hook to the original position along the movement straight line. The holds are respectively arranged at the stop positions of the intermittent movement along the movement straight line, and obtain the spouts from the multi-hook, which holds the spouts having moved on the movement straight line, and will depart from the movement straight line. 
     The fifth filling apparatus is the fourth filling apparatus, wherein the driver for sealing with the screw cap has the driver for pre-tightening the screw cap and the driver for final tightening, and the multi-hook temporarily stops the spout-equipped bag respectively at positions of the driver for pre-tightening and the driver for final tightening. 
     The sixth filling apparatus is the fifth filling apparatus, having the controller which detects the rotation angle until the mark provided on the screw cap reaches the predetermined rotational position after the torque of the driver performing the final tightening reaches the predetermined value. 
     The seventh filling apparatus is the first filling apparatus, further including the direction conversion portion, which is between the printing apparatus and the nozzle on the movement straight line of the conveyor line, and converts the conveying direction when conveying the spout-equipped bag, from the width direction of the spout-equipped bag to the thickness direction of the spout-equipped bag. 
     The eighth filling apparatus includes: the straight conveyor line receiving the empty spout-equipped bags and intermittently conveying the spout-equipped bags; and the printing apparatus directly facing the front of the empty spout-equipped bags conveyed by the conveyor line and printing the manufacturing information. The conveyor line includes: the multi-hook provided with a large number of hooks for suspending the spouts of the spout-equipped bags at equal intervals along the movement straight line, and moving the spout-equipped bags on the movement straight line by n times (n is a positive integer) the interval between the adjacent hooks in a state in which the spout-equipped bags are suspended so that the width direction of the spout-equipped bags matches the direction of the movement straight line, and then departing from the movement straight line, bypassing the movement straight line, and returning each hook to the original position along the movement straight line; the bag supply apparatus for suspending n pieces of spouts in parallel on n pieces of hooks provided continuously at equal intervals; a large number of holds respectively arranged at the stop positions of the intermittent movement along the movement straight line, holding the spouts having moved on the movement straight line, and obtaining the spouts from the multi-hook by separation of the multi-hook; n×m (m is a positive integer) pieces of transfer rails provided corresponding to n×m pieces of holds continuously provided; and the delivery device provided corresponding to the n×m pieces of holds, and delivering the spout-equipped bags obtained by the n×m pieces of the holds to the transfer rails when the multi-hook intermittently moves m times. The nozzles for filling the spout-equipped bags are respectively provided corresponding to the transfer rails. 
     The ninth filling apparatus includes: the straight conveyor line receiving the empty spout-equipped bags and intermittently conveying the spout-equipped bags; and the printing apparatus directly facing the front of the empty spout-equipped bags conveyed by the conveyor line and printing the manufacturing information. The conveyor line includes: a first multi-hook provided with a large number of hooks for suspending the spouts of the spout-equipped bags at equal intervals along a first movement straight line, and moving the spout-equipped bags on the first movement straight line by n times (n is a positive integer) the interval between the adjacent hooks in a state in which the spout-equipped bags are suspended so that the width direction of the spout-equipped bags matches the direction of the first movement straight line, and then departing from the first movement straight line, bypassing the first movement straight line, and returning each hook to the original position along the first movement straight line; a second multi-hook provided with a large number of hooks for suspending the spouts of the spout-equipped bags at equal intervals along a second movement straight line, and moving the spout-equipped bags on the second movement straight line by n times the interval between the adjacent hooks in a state in which the spout-equipped bags are suspended so that the width direction of the spout-equipped bags matches the direction of the second movement straight line, and then departing from the second movement straight line, bypassing the second movement straight line, and returning each hook to the original position along the second movement straight line; a third multi-hook provided with a large number of hooks for suspending the spouts of the spout-equipped bags at equal intervals along a third movement straight line, and moving the spout-equipped bags on the third movement straight line by 2×n times the interval between the adjacent hooks in a state in which the spout-equipped bags are suspended so that the width direction of the spout-equipped bags matches the direction of the third movement straight line, and then departing from the third movement straight line, bypassing the third movement straight line, and returning each hook to the original position along the third movement straight line; and a large number of holds respectively arranged at the stop positions of the intermittent movement along the first, the second and the third movement straight lines, holding the spouts having moved on the first, the second and the third movement straight lines, and obtaining the spouts from each multi-hook by separation of the first and second multi-hooks. The first movement straight line is on an extension of the third movement straight line, and the first multi-hook holds the spouts from the first n pieces of consecutive holds at the time of return, with respect to 2×n pieces of holds which are continuously provided and obtain the spouts from the third multi-hook. Further, the ninth filling apparatus includes: n pieces of transfer rails corresponding to the remaining n pieces of holds out of the 2×n pieces of holds; and the delivery device for delivering the spout-equipped bags obtained in the n pieces of holds to the transfer rail. The second multi-hook holds the spouts from the transfer rail at the time of return, and further there are provided the nozzles for filling the spout-equipped bags respectively corresponding to the first and second movement straight lines. 
     The foregoing detailed description has been presented for the purposes of illustration and description. Many modifications and variations are possible in light of the above teaching. It is not intended to be exhaustive or to limit the subject matter described herein to the precise form disclosed. Although the subject matter has been described in language specific to structural features and/or methodological acts, it is to be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are disclosed as example forms of implementing the claims appended hereto.