JP2015067279A - Label pasting device to flexible container and label pasting method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device which can paste a label to a flexible container in which the fluid is enclosed with good appearance.SOLUTION: In a label pasting device 10, a carrying device 20 carries a flexible container 1 in which the fluid is enclosed along a predetermined carrying path. Compression devices 30 compress the container 1 on the midway of the carrying path to raise the inner pressure of the container 1. A label transfer device 40 holding a label brings an adhesive face of the label into contact with the container 1 which is in an inflated state by inner pressure raised, and the label is transferred on the container 1. The label transfer device 40 includes an attracting roll 42 for attracting the label with the adhesive face of the label directed outward. The attracting roll 42 compresses the container 1 to paste the label to the container 1. The compression devices 30 are arranged to face each other so that the container 1 passes therebetween. The compression devices 30 are composed of a pair of inductors 31 which gradually decrease mutual interval to a specified value as the container 1 moves to the downstream side in the carrying direction.

Description

  The present invention relates to a label sticking apparatus and a label sticking method to a flexible container.

  A gas, liquid, fluid, powder, granule, or a mixture of these (in this specification, the term “fluid” is used as a collective term for these materials) is often used as a bag. Flexible containers are used. There are various methods for attaching the contents to the flexible container. Among them, the method of attaching a label on the surface of the container has a long history, and various apparatuses for automatically performing the method have been proposed. Examples of such devices can be found in US Pat.

  In the apparatus described in Patent Document 1, a label is affixed in a state where a movable bobbin is inserted into an easily deformable soft container body with an upper opening opened and the soft container body is reinforced from the inside. After sticking, the movable bobbin is pulled out from the soft container body.

  In the device described in Patent Document 2, a long flexible cylindrical body into which an expansion body is inserted is moved in the length direction by a transfer device to cause relative movement between the expansion body and the portion of the expansion body. The label is adhered to the expanded flexible cylinder with an adhesive device.

  The device described in Patent Document 3 attaches a label to a rice bag. In this apparatus, a second conveyor is disposed at an interval above the first conveyor, and a rice bag is sandwiched and conveyed between the first conveyor and the second conveyor. The 2nd conveyor is inclined and arrange | positioned and the space | interval with a 1st conveyor is decreasing toward the downstream. The rice bags passing between the first conveyor and the second conveyor are gradually pressed to remove excess air. A label is affixed to a rice bag that has been deflated.

  In the apparatus described in Patent Document 4, when a label is stuck on the surface of a container that can be deformed by external pressure, the container is sealed in a state in which the mouth of the container is sealed with a closing means so that the container is not easily recessed inside. Adhere to.

  In the apparatus described in Patent Document 5, the internal pressure is increased by denting a part of the wall surface of the sealed container, and a label is attached to the surface of the container in a state where the internal pressure is increased.

JP 2000-335536 A JP-A-9-221119 JP 2008-155931 A JP-A-7-187159 JP 2012-240749 A

  Although the apparatus which sticks a label in the state which raised the internal pressure of the flexible container is disclosed by patent documents 4 and 5, the apparatus of patent document 4 is intended for the empty container which does not contain the contents. The device described in Patent Document 5 is intended for a container having a special structure in which a part of the wall surface can be changed from a convex state to a concave state and the state after the change can be self-held. However, there are many flexible containers that do not satisfy these conditions.

  For example, a bag for infusion used in a medical field needs to be filled with infusion before the inside of the bag is exposed to the outside air, so the filling process into the bag is preceded, and the labeling process is after that. . In addition, it must be said that it is difficult to realize a part of the wall surface from the convex state to the concave state and to self-hold the state after changing to the concave state from the material of the bag.

  The following requirements exist for infusion bags. That is, the infusion bag is transparent so that the content can be clearly seen, and the label is also printed on a transparent film. When air bubbles enter between such a transparent bag and a transparent label, it becomes very unsightly. Therefore, labeling must be performed while avoiding air as much as possible.

  The present invention has been made in view of the above-described points, and an object of the present invention is to provide an apparatus capable of sticking a label with a good appearance to a flexible container in which a fluid is enclosed.

  In order to achieve the above object, the present invention is an apparatus for applying a label to a flexible container in which a fluid is sealed, and a transport apparatus that transports the container along a predetermined transport path; A label transfer device that presses the container in the middle to increase the internal pressure of the container, and makes the adhesive surface of the held label contact the container in a state where the internal pressure is increased, and transfers the label to the container And a device.

  According to this configuration, utilizing the fact that the encapsulated fluid is fluid and the container can be deformed, the container is pressed in the middle of the transport path to increase the internal pressure of the container, and the label is attached in that state. Therefore, the label can be attached with good appearance to a container having no wrinkle on the surface.

Moreover, the present invention provides the label affixing device to the flexible container having the above-described configuration, wherein the compression device
The containers are arranged so as to face each other so as to pass between them, and are constituted by a pair of derivatives whose mutual distance gradually decreases to a predetermined value as it goes downstream in the transport direction.

  According to this configuration, since the container is naturally compressed as it is conveyed, the configuration of the compression device is simplified.

  According to the present invention, in the label affixing device to the flexible container having the above-described configuration, at least one of the derivatives is configured by a belt that feeds the container in the transport direction.

  According to this configuration, since the propulsive force is received not only from the conveying device but also from the derivative, the container does not stagnate at the position of the compression device.

  Further, the present invention provides the label affixing device to the flexible container having the above-mentioned configuration, wherein the label transfer device includes an adsorbing roll that is arranged in a shape orthogonal to the transport path and adsorbs the label on the surface thereof, The roll is characterized in that the label is affixed to the container while the inner pressure is increased and the container is in a full state.

  According to this configuration, since the air is expelled from between the container and the label in the process in which the suction roll presses the full container, it is possible to obtain a container having a beautiful appearance without bubbles between the container and the label. it can.

  The present invention is also directed to a label affixing device for a flexible container having the above-mentioned configuration, wherein the label transfer device is a label supply device for projecting the label from a peeling tape toward the container that is inflated by increasing internal pressure. And a pressing body that presses the adhesive surface of the label against the container.

  According to this configuration, since air is expelled from between the container and the label in the process in which the pressing body presses the label on the container that is full, a container having a beautiful appearance in which no bubbles are present between the container and the label is obtained. Can do.

  According to the present invention, in the label affixing device to the flexible container configured as described above, the compression device compresses the container without stopping the movement of the container.

  According to this configuration, since the labeling is performed without stopping the movement of the container, the working efficiency of the apparatus is high.

  According to the present invention, in the label affixing device for the flexible container having the above-described configuration, a transport device recognition device for recognizing the position of the container on the transport device is provided, and the label transfer device is the transport device recognition device. The label sticking is started from a predetermined position in the transport direction of the container based on the recognition result.

  According to this structure, a label can be stuck on the predetermined position of a container and the external appearance of a container can be kept uniform.

  Further, the present invention provides a method of transporting the container along a predetermined transport path when pressing a label on a flexible container enclosing a fluid, and compressing the container in the transport path to compress the internal pressure of the container. The label sticking method is characterized in that the label is attached to the container by bringing the adhesive surface of the label into contact with the container in a state where the internal pressure is increased.

  According to this method, using the fact that the encapsulated fluid is fluid and the deformation of the container is possible, the container is pressed in the middle of the transport path to increase the internal pressure of the container, and the label is attached in that state Therefore, the label can be attached with good appearance to a container having no wrinkle on the surface.

  According to the present invention, the flexible container in which the fluid is sealed is pressed in the middle of the conveying path to increase the container internal pressure, and the label is attached in that state, so that wrinkles do not occur and air bubbles cannot be confined. The label can be attached as follows.

It is a fragmentary top view which shows the structure of the principal part of a label sticking apparatus. It is sectional drawing which makes the AA line of FIG. 1 a cross-sectional location. It is the same partial top view as FIG. 1, and shows a different state from FIG. It is sectional drawing which makes the BB line of FIG. 3 a cross-sectional location. It is the same partial top view as FIG.1 and FIG.3, and shows a different state from FIG.1 and FIG.3. It is sectional drawing which makes CC line of FIG. 5 a cross-sectional location. It is a side view explaining operation | movement of a label sticking apparatus. It is a block block diagram of a label sticking apparatus. It is a partial top view of the label sticking apparatus which concerns on 2nd Embodiment. It is a fragmentary top view of the label sticking apparatus which concerns on 3rd Embodiment. It is a side view explaining operation | movement of the label sticking apparatus which concerns on 4th Embodiment.

  1st Embodiment of this invention is described based on the figure from FIG. 1 to FIG. A flexible container (hereinafter simply referred to as “container”) 1 is a transparent bag for infusion, and a mouth member 2 is attached to one end. Most of the volume of the container 1 is occupied by infusion, and the remainder is filled with air. A label 3 shown in FIG. 7 is stuck on the surface of the container 1 by a label sticking device 10.

  The main elements constituting the label sticking apparatus 10 are as follows. That is, the container 1 is placed on the upper surface, and the conveyance device 20 that conveys the container 1 along a predetermined conveyance path, and the compression device 30 that presses the container 1 in the middle of the conveyance path to increase the internal pressure of the container 1 are held. A label transfer device 40 for bringing the suction surface of the label 3 into contact with the container 1 in a state where the internal pressure is increased, and transferring the label 3 to the container 1, and a label supply device 50 for supplying the label 3 to the label transfer device 40 It is.

  The transport device 20 includes a horizontal base 21 extending along the transport direction, and a conveyor belt 22 placed on the top surface of the base 21. The conveyor belt 22 is a flat belt, and is driven at a predetermined speed from the left to the right in FIG. 1 by a power source 23 for a conveying device shown in FIG.

  As shown in FIG. 7, the transport device 20 is provided with a transport device recognition device 24 that recognizes the position of the container 1 on the conveyor belt 22 for each individual container 1. The transport device recognition device 24 includes a camera that images the container 1 and an analysis unit that analyzes image information from the camera. In FIG. 7, the figure of the camera symbolizes the whole recognition device 24 for the transport device.

  The compression device 30 is configured by a pair of derivatives 31 that are arranged so as to face each other so that the container 1 passes between them, and the mutual distance gradually decreases to a predetermined value as the container 1 moves downstream in the conveyance direction. The pair of derivatives 31 are arranged on both sides of the conveying device 20 so as to sandwich the container 1 carried by the conveying device 20. In this embodiment, the derivative 31 is configured by a round belt 35 wound around three pulleys 32, 33, and 34. The pulley 32 is located upstream in the conveying direction, the pulley 34 is located downstream in the conveying direction, and the pulley 33 is located between the pulleys 32 and 34 and is rotatably attached to the lower surface of the horizontal support deck 36. Yes.

  The pulleys 32, 33, and 34 face each other, and the distance between the pair of pulleys 32 is wide enough to allow the container 1 to be received with sufficient margin, but the distance between the pair of pulleys 33 and the pair of pulleys 34 is It is narrower than that. The pair of round belts 35 gradually decreases in the interval between the pulleys 32 and 33, and when reaching the pulley 33, the mutual interval becomes the predetermined value described above. The “predetermined value” is set smaller than the lateral width of the container 1. The predetermined mutual distance is maintained up to the pulley 34. In the section between the pulley 33 and the pulley 34, the pair of round belts 35 are parallel to each other and are also parallel to the center line of the transport device 20.

  The pulley 34 is a driving pulley and is rotated by a compression device power source 37 attached to the upper surface of the support deck 36. The compression device power source 37 is constituted by a motor with a speed reduction mechanism. The pulleys 32 and 33 are driven pulleys.

  The round belt 35 presses the container 1 in the section between the pulleys 33 and 34. The direction of compression is perpendicular to the transport direction. A backup plate 38 that supports the round belt 35 from the side opposite to the container 1 is attached to the support deck 36 so that the round belt 35 does not bend against the repulsive force from the container 1 at this location. The pair of backup plates 38 facing each other can adjust the distance between them, and the pressure exerted on the container 1 by the round belt 35 can be finely adjusted.

  The label transfer device 40 is disposed above the transport device 20 and the compression device 30, and the container 1 passes thereunder. In the first embodiment, the label suction device 41 is the center of the configuration of the label transfer device 40. The label suction device 41 includes a horizontal suction roll 42 that is arranged such that the roll axis is orthogonal to the transport path of the transport device 20.

  A large number of suction ports (not shown) are formed on the outer peripheral surface of the suction roll 42. The inside of the suction roll 42 is a cavity, and this cavity is connected to a label suction device vacuum source 43 shown in FIG. When the label suction device vacuum source 43 is operated, air is sucked into the internal cavity from the suction port, and the suction force acts on the label 3. The suction roll 42 is wider than the label 3, and exerts pressure on the entire width of the label 3 when the label 3 is attached to the container 1. The suction roll 42 is rotated around a horizontal axis by a label suction device power source 44 shown in FIG. The rotation direction is a direction in which the container 1 is advanced in the transport direction.

  The position of the suction roll 42 in the transport direction is near the center of the backup plate 38. The suction roll 42 is disposed at a height such that the distance between the lower end of the suction roll 42 and the upper surface of the conveyor belt 22 is approximately the same as the thickness of the container 1 that is not compressed by the compression device 30.

  The label supply device 50 uses the peeling tape 51 as label supply means. The release tape 51 is made of release paper, and the label 3 is attached to the surface with the adhesive force of the adhesive surface. The peeling tape 51 is fed from the feeding spool 52 and wound around the take-up spool 53, and is wound around the peeling blade 54 on the way. The angle of the peeling blade 54 can be adjusted with the end close to the feeding spool 52 as a fulcrum, and the tip that forms a sharp edge is close to a predetermined distance with respect to the outer peripheral surface of the suction roll 42.

The take-up spool 53 is rotated by a label supply device power source 55 shown in FIG.
When the take-up spool 53 rotates to take up the peeling tape 51, the feed spool 52 also rotates. When the supply spool 52 and the take-up spool 53 rotate, the peeling tape 51 moves as indicated by the arrow in FIG. 7, and the peeling tape 51 wound around the peeling blade 54 changes its direction at a steep angle at the tip of the peeling blade 54. At this time, the adhesive surface of the label 3 is peeled off from the peeling tape 51, and the label 3 is peeled off from the peeling tape 51. The peeled label 3 is adsorbed by the adsorbing roll 42 with the adhesive surface facing outward.

  The label supply device 50 is provided with a label supply device recognition device 56 that recognizes the position of the label 3 on the peeling tape 51 for each label 3. The label supply device recognition device 56 includes a camera that captures an image of the label 3 and an analysis unit that analyzes image information from the camera. In FIG. 7, the camera graphic symbolizes the entire label supply device recognition device 56.

The control device 60 shown in FIG. 8 controls the label sticking device 10. The control target of the control device 60 includes a power source 23 for a transport device that moves the conveyor belt 22 of the transport device 20 relative to the compression device 30 and the label transfer device 40, and a round belt 35 of the compression device 30 as the conveyor belt 22. A pressure source power source 37 that moves in synchronization, a label suction device vacuum source 43 that exerts a vacuum suction force on the suction roll 42 of the label suction device 41, a label suction device power source 44 that rotates the suction roll 42, and a label A label supply device power source 55 for rotating the take-up spool 53 of the supply device 50 is included. The transport device power source 23, the compression device power source 37, the label suction device power source 44, and the label supply device power source 55 are all constituted by motors. The control device 60 receives information from the transport device recognition device 24 and the label supply device recognition device 56 and outputs an operation command to the transport device recognition device 24 and the label supply device recognition device 56.

  The operation of the label sticking device 10 is as follows. The conveying device 20 places the containers 1 on the conveyor belt 22 at predetermined intervals and conveys them from left to right in FIG. The mouth member 2 of the container 1 is directed in the traveling direction. When the transport device recognition device 24 recognizes the mouth member 2, the position of the container 1 on the conveyor belt 22 is specified.

  The container 1 to be conveyed reaches the compression device 30 and enters between the pair of derivatives 31. The distance between the pair of round belts 35 constituting the pair of derivatives 31 decreases as the pulley 33 approaches the pulley 33, and contact between the container 1 and one of the round belts 35 starts at any time before reaching the pulley 33. . The round belt 35 that comes into contact with the container 1 pushes the container 1 toward the center line when the container 1 is displaced from the center line of the transport device 20, and corrects the positional deviation.

  The container 1 traveling along the center line of the transport device 20 contacts the round belts 35 on both sides. As described above, in the section between the pulley 33 and the pulley 34, the mutual distance between the pair of round belts 35 is set to be smaller than the lateral width of the container 1, so that the container 1 is as shown in FIGS. It begins to be pressed from the direction perpendicular to the transport direction. Since the round belt 35 moves at the same speed as the conveyor belt 22 and feeds the container 1 in the transport direction, the container 1 receives a propulsive force not only from the conveyor belt 22 but also from the round belt 35, thereby causing a stagnation. Progress without.

  As described above, in the section between the pulley 33 and the pulley 34, the round belt 35 is parallel to the center line of the transport device 20, so the direction of the container 1 is also corrected in the correct direction. Thereby, the label 3 is not affixed to the container 1 in a form in which the angle is shifted.

  A pair of round belts 35 whose mutual distance is reduced to a predetermined value at the pulley 33 place the container 1 from both sides and press it. Thereby, the container 1 swells in the vertical direction, and the upper surface not in contact with the conveyor belt 22 swells in a convex shape (see FIG. 4). The upper surface of the container 1 is tightly stretched without wrinkles. In this state, the container advances to the position shown in FIG.

  In the label supply device 50, the peeling tape 51 is pulled out from the feeding spool 52. The label supply device recognition device 56 recognizes the label 3 on the surface, whereby the position of the label 3 on the peeling tape 51 is specified. The control device 60 controls the rotation of the take-up spool 53 so that the peeling of the label 3 at the tip of the peeling blade 54 is started at a predetermined timing. The label 3 peeled at a predetermined timing is adsorbed to a predetermined portion of the adsorption roll 42.

  The predetermined location of the suction roll 42 is from the predetermined position in the transport direction of the container 1 where the label 3 that has been transferred to the suction roll 42 is attached to the container 1 by the recognition result of the transport device recognition device 24. It is the position that will start. In this way, the label 3 is started from a well-defined location, and the orientation of the container 1 itself is corrected by being sandwiched between the pair of round belts 35 as described above. It is affixed to the predetermined location of the container 1 without angular deviation. As a result, the appearance of any container 1 becomes uniform.

  As described above, the suction roll 42 is disposed at such a height that the distance between the lower end of the suction roll 42 and the upper surface of the conveyor belt 22 is approximately the same as the thickness of the container 1 that is not compressed by the compression device 30. The height of the container 1 exceeds the height of the lower end of the suction roll 42. Since the container 1 in this state tries to pass under the suction roll 42 as shown in FIG. 7, the upper surface of the container 1 and the label 3 are pressed by the suction roll 42. As a result, air is expelled from between the container 1 and the label 3, and no bubbles exist between the container 1 and the label 3. By sticking the label 3 to the container 1 while expelling air in this way, the container 1 having a beautiful appearance can be obtained. In addition, the absence of bubbles increases the adhesion area between the container 1 and the label 3, making it difficult for the label 3 to peel off.

  Since the pressing device 30 compresses the container 1 without stopping the movement of the container 1, the label sticking device 10 has high work efficiency. In the present embodiment, the derivative 31 is configured by the round belt 35. However, a belt other than the round belt, for example, a flat belt or a timing belt may be used.

  FIG. 9 shows a second embodiment of the present invention. The second embodiment is different from the first embodiment in that the derivative 31 of the compression device 30 is not a belt but a roller. In FIG. 9, a pair of derivatives 31 is configured in which a large number of rollers 70 are lined up in a row and the mutual distance gradually decreases to a predetermined value as it advances downstream in the conveyance direction.

  Among the rollers 70, the roller 70 in the section involved in the compression of the container 1 can be a driving roller that actively sends the container 1 in the transport direction. The remaining roller 70 may be a driven roller that does not actively rotate by itself. In addition, even if it is the roller 70 of the area related to the compression of the container 1, all the numbers do not need to be a driving roller, and a part can be used with a driven roller. For example, a configuration in which every other driving roller and driven roller are arranged.

  Also in the second embodiment, the container 1 is compressed by the compression device 30 without stopping the movement of the container 1, so that the label sticking device 10 has high work efficiency.

  FIG. 10 shows a third embodiment of the present invention. The feature of the third embodiment is that the derivative 31 of the compression device 30 is composed of a plate-like member 71 instead of a belt. In FIG. 10, a pair of derivatives 31 is formed in which the distance between the plate-like members 71 bent in a square shape gradually decreases to a predetermined value as the plate-like member 71 advances downstream in the transport direction.

  Although the plate-like member 71 can be formed of a metal plate, it is preferable to subject the surface with which the container 1 contacts to a friction reducing process such as a fluororesin process so as not to hinder the progress of the container 1. The entire plate-like member 71 may be molded from a resin material having a small friction coefficient.

  Also in the third embodiment, the container 1 is compressed by the compression device 30 without stopping the movement of the container 1, so that the label applicator 10 has high work efficiency.

  In the embodiments described so far, a pair of the same type of derivatives 31 are arranged facing each other, but different types of derivatives 31 may be combined. For example, the belt-type derivative 31 introduced in the first embodiment is arranged on one side of the conveying device 20, and the roller-type derivative 31 introduced in the second embodiment or the plate introduced in the third embodiment on the opposite side. It is possible to adopt a configuration in which a cylindrical member-type derivative 31 is disposed.

  FIG. 11 shows a fourth embodiment of the present invention. The fourth embodiment differs from the previous embodiments in the configuration of the label transfer device 40. That is, the label transfer device 40 according to the fourth embodiment does not include the label suction device 41 but includes a label supply device 50 instead.

  In the label supply device 50, the label 3 peeled from the peeling tape 51 by changing the direction to a steep angle at the tip of the peeling blade 54 protrudes toward the container 1 with the adhesive surface facing the upper surface of the container 1. Placed in position. Needless to say, the container 1 at this time is compressed by the compression device 30 to increase the internal pressure, and is in a full state.

  The label supply device 50 feeds the peeling tape 51 so that the ejection speed of the label 3 is substantially equal to the conveyance speed of the container 1. For this reason, the label 3 protruding toward the container 1 moves in synchronism with the container 1 after one part of the adhesive surface contacts the upper surface of the container 1, and at the same time, the holding body of the label 3 moves from the peeling tape 51 to the container 1. And change.

  Simply placing the label 3 on the container 1 does not ensure the elimination of air from between the label 3 and the container 1. Therefore, the pressing body 45 is arranged slightly downstream of the point where the contact between the tip of the label 3 and the container 1 begins. The pressing body 45 shown in FIG. 11 is configured by a horizontal pressing roll 46 that is arranged such that its axis is orthogonal to the transport path of the transport device 20. The pressing roll 46 is disposed at a height such that the distance between the lower end of the pressing roll 46 and the upper surface of the conveyor belt 22 is approximately the same as the thickness of the container 1 that is not compressed by the compression device 30.

  In the place of the pressing roll 46, the place in the container 1 and the label 3 that has just started contact comes. Since this portion tries to pass under the pressing roll 46, the upper surface of the container 1 and the label 3 are pressed by the pressing roll 46. As a result, air is expelled from between the container 1 and the label 3, and no bubbles exist between the container 1 and the label 3. By sticking the label 3 to the container 1 while expelling air in this way, the container 1 having a beautiful appearance can be obtained.

  The pressing roll 46 is wider than the label 3 and exerts pressure on the entire width of the label 3. The pressing roll 46 may be rotated by following the movement of the container 1, or may be positively rotated in the direction in which the container 1 is advanced in the transport direction.

  The pressing body 45 can also be composed of other than the pressing roll 46. For example, a member such as a spatula that squeezes the container 1 and the label 3 can be used as the pressing body 45.

  A configuration in which the peeling blade 54 of the label supply device 50 is swung in a vertical plane by a power source is also possible. If the tip of the peeling blade 54 is always lifted, the label 3 protrudes a predetermined length, and then the tip of the peeling blade 54 is lowered so that the tip of the label 3 contacts the upper surface of the container 1. It becomes easier to control the contact start position of 1.

  Although the embodiments of the present invention have been described above, the scope of the present invention is not limited to these embodiments, and various modifications can be made without departing from the spirit of the invention.

  The present invention can be used for a device for applying a label to a flexible container.

DESCRIPTION OF SYMBOLS 1 Flexible container 3 Label 10 Label sticking apparatus 20 Conveyance apparatus 24 Recognition apparatus for conveyance apparatus 30 Compression apparatus 31 Derivative 35 Round belt 40 Label transfer apparatus 41 Label adsorption apparatus 42 Adsorption roll 45 Press body 50 Label supply apparatus 56 Label supply apparatus Recognition device 60 control device 70 roller 71 plate-like member

Claims (8)

A device for attaching a label to a flexible container enclosing a fluid,
A transport device for transporting the container along a predetermined transport path;
A compression device that compresses the container in the middle of the conveyance path to increase the internal pressure of the container;
A label transfer device for bringing the pressure-sensitive adhesive surface of the held label into contact with the container in a state where the internal pressure is increased, and transferring the label to the container;
A device for attaching a label to a flexible container, comprising:   The compression device is configured by a pair of derivatives that are arranged so as to face each other so that the containers pass between each other, and the mutual distance gradually decreases to a predetermined value as the container moves downstream in the conveyance direction. The label sticking apparatus to the flexible container of 1.   The label affixing device for a flexible container according to claim 2, wherein at least one of the derivatives is constituted by a belt that feeds the container in a conveying direction.   The label transfer device includes an adsorbing roll that is arranged perpendicular to the transport path and adsorbs the label on the surface thereof, and the adsorbing roll presses the container that has been inflated with an increased internal pressure. The label affixing device for a flexible container according to any one of claims 1 to 3, wherein the label is affixed to a container.   The label transfer device includes a label supply device that protrudes the label from a peeling tape toward the container that is inflated by increasing an internal pressure, and a pressing body that presses the adhesive surface of the label against the container. The label sticking device to the flexible container according to any one of claims 1 to 3, wherein the device is a label sticking device.   The labeling device for a flexible container according to any one of claims 1 to 5, wherein the compression device compresses the container without stopping the movement of the container.   A transport device recognition device for recognizing the position of the container on the transport device, and the label transfer device applies the label from a predetermined position in the transport direction of the container based on a recognition result of the transport device recognition device. The label sticking device to the flexible container according to any one of claims 1 to 6, wherein the device is started. When applying a label to a flexible container filled with fluid,
Transporting the container along a predetermined transport path;
Squeezing the container in the middle of the transport path to increase the internal pressure of the container,
A label attaching method, wherein the label is attached to the container by bringing an adhesive surface of the label into contact with the container in a state where the internal pressure is increased.

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