WO2012108307A1

WO2012108307A1 - Label attachment device

Info

Publication number: WO2012108307A1
Application number: PCT/JP2012/052211
Authority: WO
Inventors: 杉本　宏; 聖仁井
Original assignee: 株式会社フジシールインターナショナル
Priority date: 2011-02-08
Filing date: 2012-02-01
Publication date: 2012-08-16

Abstract

Provided is a label attachment device wherein when a cylindrical tensile label is attached to a container, the end-face of the label attached to the container can have a linear shape. A label attachment device configures a label attachment system, together with a bottle supply device, a label generation device, a label base material supply device, a label transfer device, a label delivery device, and a bottle transfer deice. The label attachment device has a diameter expansion claw (50) for expanding the label (L) in the diameter direction, the diameter expansion claw (50) comprising a claw portion (54) and a leaf spring (58) provided at the tip end of the claw portion (54) and projecting from the tip end so as to function as an elastic body. The length of the claw portion (54) and the leaf spring (58) in the axial direction is longer than the length of the label in the axial direction. For the elastic body, a cloth knitted to be stretchable can be used in place of the leaf spring (58).

Description

Label mounting device

The present invention relates to a label mounting apparatus, and more particularly to a label mounting apparatus used for mounting a cylindrical extensible label (also referred to as a stretch label) on a container.

To attach a cylindrical label to a container, it is known to spread the cylindrical label so that it can be placed on the container, and then attach the label placed on the container by its own elasticity or elasticity. Yes. In recent years, highly stretchable labels have been used. A highly stretchable label is made by using a sheet material having an elastic deformation rate that is an elongation rate (that is, an elongation rate that elastically shrinks so that it can be attached to a container after stretching), for example, from 40% to 60%. In order to attach a highly stretchable label to a container, it is necessary to consider differently from the case of using a conventional label having a low elongation rate.

Although it is not a special technique for a label with a high elongation rate, for example, in Patent Document 1, as a conventional technique for attaching a cylindrical stretch label, a label is opened with a suction cup, and this is applied to a plurality of diameter-enlarged claws. It is stated that the label is clamped between the label clamper and the diameter-enlarging claw. Furthermore, it is described that the container is lifted and inserted into the diameter-enlarging claw in this state, the bottle clamper is also lifted, and the container is clamped together with the label.

In addition, although a label having a low elongation rate is used, Patent Document 2 discloses a conventional method for attaching a stretch label, through an opening provided on an inner peripheral surface of a ring-shaped hollow case, as a conventional technique. It is stated that the diameter of the stretch label is expanded with six guide plates that can move toward the surface. And in this prior art, it has pointed out that the diameter expansion amount of the stretch label by a guide plate is large, a stretch label is damaged, and the crack of printing ink arises. Thus, here, it is disclosed that a flexible tongue piece is used as the guide plate. In this way, as the container is raised to attach the stretch label to the container, the shoulder of the container rises while spreading the stretch label through the flexible tongue, thus preventing damage to the stretch label. It is stated that it can be suppressed.

Japanese Patent No. 2639658 Japanese Patent Publication No. 4-31931

装着 There are several problems with attaching highly extensible labels to containers. For example, even if the shape of the label is uniform, when the label is put on the container, it may not be able to be uniformly mounted on the container due to high elasticity, and the end face shape may not be straight.

An object of the present invention is to provide a label mounting device that makes it possible to align the end face shape of a label mounted on a container when the cylindrical extensible label is mounted on the container.

A label mounting apparatus according to the present invention is a label mounting apparatus used for mounting a cylindrical extensible label on a container, and is arranged radially on a base having an opening in a central axis through which the container passes. A plurality of diameter-enlarged claws that are movable in the radial direction and extend in the axial direction between a diameter-reduced diameter-reduced position for receiving the label for enlarging the diameter and a diameter-enlarged diameter-enlarged position for extending the label; An elastic body provided further from the tip of the diameter claw toward the tip side, and a length obtained by combining the axial length of the diameter-enlarging claw and the axial length of the elastic body is the axial length of the label It is characterized by exceeding.

Further, in the label mounting apparatus according to the present invention, the elastic body is preferably a leaf spring body or a stretchable cloth.

In the label mounting apparatus according to the present invention, it is preferable that the elastic body is subjected to low friction processing at least on the outer peripheral side.

Further, in the label mounting device according to the present invention, it is preferable that a seal positioning means for adjusting the seal position of the cylindrical extensible label to any one of the plurality of diameter-enlarged claws is provided.

With the above configuration, the label mounting apparatus includes a plurality of diameter-enlarged claws movable between a diameter-reduced position where the label is received and a diameter-enlarged position where the label is expanded, The elastic body is provided further from the tip of the diameter-enlarging claw toward the tip. And the length which match | combined the length of the axial direction of a diameter expansion nail and the length of the axial direction of an elastic body is set so that the length of the axial direction of a label may be exceeded.

When a label is placed on a container and the label moves axially together with the container, the upper end of the highly extensible label may vary in the axial extension of the label due to variations in friction between the container and the label. This makes it difficult for the end face shape to become straight. If the axial length of the diameter-enlarging claw is made longer than the axial length of the label, the label slides on each diameter-enlarging claw, and the contact between the label and the container can be suppressed. However, if the axial length of the diameter-enlarging claw is extended, the strength of the diameter-enlarging claw is insufficient, and it is difficult to cope with a lengthy label that is long in the axial direction. Therefore, the axial length of the diameter-enlarging claw is a length that can ensure the strength, and an elastic body is added to the end, and the axial length of the diameter-enlarging claw and the elastic body combined exceeds the axial length of the label. By doing so, the contact between the label and the container can be suppressed, and the label position can be aligned in the circumferential direction of the upper end of the label.

Also, in the label mounting apparatus, the elastic body is a leaf spring body or a stretchable cloth, so that the label can be aligned with the container shape with appropriate springiness.

Further, in the label mounting apparatus, since the elastic body is subjected to low friction processing at least on the outer peripheral side, the absolute value of the frictional resistance on each elastic body becomes small, and the variation of the frictional resistance becomes a small value. This makes it easier to align the label positions in the circumferential direction at the upper end of the label.

Also, in the label mounting device, the seal position along the axial direction of the supplied cylindrical extensible label is aligned with any one of the plurality of diameter-enlarged claws. The seal part of the label is different from the other parts in terms of slipperiness and elasticity, so that it does not come over the container. This makes it easier to align the label positions in the circumferential direction at the upper end of the label.

It is a figure explaining the structure of the label mounting system in which the label mounting apparatus of embodiment which concerns on this invention is used. It is a figure explaining the mode of the leaf | plate spring as a some diameter expansion nail | claw used for the label mounting apparatus of embodiment which concerns on this invention, and its upper elastic body. In the label mounting apparatus of embodiment which concerns on this invention, it is a figure explaining the mode of a diameter expansion nail | claw, an elastic body, and a label when a label is delivered. In embodiment which concerns on this invention, it is a figure explaining the mode of the procedure which attaches a label to a container, and is a figure which shows a mode that a label is arrange | positioned to the diameter expansion nail | claw of a diameter reduction position first. In the state of FIG. 4, it is a figure explaining the positional relationship of the seal part of a label, and a diameter-enlargement nail | claw. It is a figure which shows a mode that a diameter expansion nail | claw becomes an diameter expansion position in the next procedure of FIG. It is a figure which shows a mode that a container enters into the inner peripheral side of a some diameter expansion nail | claw in the next procedure of FIG. It is a figure explaining the label position of the circumferential direction in the upper end of a label when a diameter-expansion nail | claw and an elastic body are removed by the next procedure of FIG. 7, and a label is mounted | worn with a container compared with a prior art. In embodiment which concerns on this invention, it is a figure explaining a mode that the cross | stretchable cloth is used as an elastic body.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Hereinafter, the label mounting system will be described as including a bottle supply device, a label mounting device, a label generation device, a label base material supply device, a label transport device, a label delivery device, and a bottle transport device. However, this is one example of the configuration, and other elements may be added, or some, but not all of these elements may be combined to form a label mounting system.

In the following, similar elements are denoted by the same reference symbols in all drawings, and redundant description is omitted. In the description in the text, the symbols described before are used as necessary.

FIG. 1 is a configuration diagram of a label mounting system 1 including a label mounting device 3. This label mounting system 1 is for mounting, for example, a cylindrical stretch label L representing the name of a soft drink or the like injected into the bottle on the surface of a PET bottle. Hereinafter, the stretch label L is simply referred to as a label L unless otherwise specified.

In this label mounting system 1, the bottles B, which are a large number of containers, are arranged in a row and transported in a horizontal plane. Moreover, it cut | disconnects to each label L, drawing | feeding out the elongate label base material S on which many labels L were printed by the fixed space | interval. Then, the cut labels L are sequentially conveyed to the conveyance path of the bottle B, and each label L is attached to each bottle B at a position on the conveyance path. The bottles to which the label L is attached are transported out in a row again in a horizontal plane.

As shown in FIG. 1, the label mounting system 1 includes a bottle supply device 2 for supplying a bottle B, and a label mounting device 3 for mounting a label L on the bottle B supplied by the bottle supply device 2. , A label base material supply device 5 that feeds out the long label base material S and supplies the long label base material S toward the label generating device 4, and intermittently transports the long label base material S supplied from the label base material supply device 5. The label generation device 4 that generates individual labels L by cutting the label L, the label conveyance device 6 that conveys the label L generated by the label generation device 4 to the downstream side while adsorbing the label L, and the label from the label conveyance device 6 A label delivery device 7 that receives L and delivers it to the label mounting device 3 and a bottle transport device 8 for carrying out the bottle B with the label L attached thereto are included.

The label substrate S is formed by continuously connecting cylindrical labels L attached to the bottle B. The label base material S, that is, each label L is formed of, for example, a polyethylene resin such as a highly extensible linear low density polyethylene (LLDPE). Of course, as long as the film has the same high stretchability, it may be formed of other materials, for example, an olefin resin such as ethylene vinyl acetate copolymer (EVA) or polypropylene resin, or a vinyl chloride resin. Good. The label expanding apparatus according to the present embodiment is particularly effective when the elastic deformation rate of the label L is 10% or more, for example, 30% to 50%, and has a high extensibility of 50% or more. It is also effective for L. Here, the elastic deformation rate of 30 to 50% means that the instantaneous strain after elongation of 30 to 50% becomes 10.5% or less. Further, the label base material S is wound around, for example, a base material reel (not shown) in a state of being folded into a substantially sheet shape in the base material feeding unit 18 of the label base material supply device 5.

The name of the soft drink filled in the bottle B is printed on each label L constituting the label substrate S. Each label L is formed with a reference mark indicating a reference position when the label base material S is cut by the label generating device 4. For example, a rectangular mark can be used as the reference mark.

The label base material supply device 5 continuously feeds the long label base material S fed from the base material feeding portion 18 to the label generating device 4 at a predetermined speed. A support roller can be used for delivery.

The label generation device 4 generates a plurality of labels L by cutting the label base material S supplied by the label base material supply device 5 into a predetermined length using a reference mark. The label generating device 4 includes a cutting device, a feeding device for transporting the label base material S to the cutting device, a mark sensor for detecting a reference mark, and the like.

The label transport device 6 transports the label L generated by the label generation device 4 to the label delivery device 7 on the downstream side. The label conveying device 6 includes a mechanism for sucking a label and a conveying mechanism such as a belt.

The label delivery device 7 is for receiving the label L transported by the label transport device 6 and delivering it to the label mounting device 3. The label delivery device 7 includes a take-up member 46 that holds the label L by suction and an arm 47 that supports them radially from the rotation shaft. The rotational speed of the rotary shaft is controlled so that the take-up member 46 can sequentially receive the labels L at the timing when the labels L are transported by the label transport device 6.

The bottle supply device 2 conveys a plurality of bottles B and supplies them to the label mounting device 3. The bottle supply device 2 includes a conveyor 11, a screw conveyor 12 and a star wheel 13.

The conveyor 11 is driven by a conveyance motor (not shown), and the screw conveyor 12 is connected to the main shaft 14 of the label mounting device 3 and driven to convey a plurality of bottles B. Specifically, the conveyor 11 has a function of transporting a large number of bottles B in a row, and the screw conveyor 12 has a function of adjusting the interval between the large number of bottles B transported by the conveyor 11 to a predetermined transport interval. Have This predetermined conveyance interval substantially corresponds to the interval between the plurality of recesses 13 a for holding the bottle B formed on the periphery of the star wheel 13.

The star wheel 13 rotates in synchronization with the main shaft 14 of the label mounting device 3 and delivers the bottle B to the label mounting device 3 while holding a plurality of bottles B at equal intervals on the outer periphery. Specifically, the star wheel 13 has a function of holding the bottles B transported by the conveyor 11 and the screw conveyor 12 by the concave portions 13 a for holding the bottles and transporting them to the label mounting device 3.

The label mounting device 3 is a rotary device that transports them in the circumferential direction while holding the bottle B supplied from the bottle supply device 2. In the middle of conveying the bottle B in the circumferential direction, the label mounting device 3 delivers the label L from the label delivery device 7, expands the delivered label L into a cylindrical shape, and inserts the bottle B therein. By doing so, the label L is attached to the bottle B. Then, it is further conveyed in the circumferential direction, and the bottle B with the label L attached is delivered to the bottle conveying device 8.

The label mounting device 3 has a label mounting head 20 for mounting the label L on the bottle B, and a main shaft 14 on which a plurality of label mounting heads 20 are mounted radially at regular intervals. The interval between the label mounting heads 20 is substantially the same as the interval between the concave portions 13 a of the star wheel 13. The label mounting head 20 is rotated in the circumferential direction when the main shaft 14 is rotationally driven in a direction indicated by an arrow in FIG. 1 by a main shaft motor (not shown). The rotation speed of the label mounting head 20 can be changed according to the production amount of the bottle B.

The label mounting head 20 has a function of receiving the label L from the label delivery device 7, and a function of opening the received label L into a cylindrical shape because the received label L is in a folded state. A function of expanding the bottle B so that the bottle B can be inserted, a function of raising the bottle B into the expanded label L, inserting the label L into the bottle B, and a bottle B with the label L attached. The bottle clamper has a function to pull up from the label expanding device.

As shown in FIG. 1, the label mounting device 3 conveys the bottle B supplied from the bottle supply device 2 at the bottle delivery position P <b> 1 in the circumferential direction while being held by the label mounting head 20. The label mounting device 3 receives the label L from the label delivery device 7 at the label delivery position P2. The label L is the label L received from the label transport device 6 at the label suction position P6 and sucked by the label delivery device 7, rotated around the rotation axis, and transported to the label delivery position P2. The label mounting device 3 receives the label L and mounts it on the bottle B while moving around the main shaft 14 in the arrow direction at the label mounting position P3. Then, the label mounting device 3 transfers the bottle B with the label L mounted to the bottle transport device 8 at the bottle delivery position P4.

The bottle conveying device 8 is for receiving the bottle B with the label L attached from the label attaching device 3 and carrying it out to downstream processes such as inspection and packing. The bottle transport device 8 includes a star wheel 15 and a conveyor 16.

The star wheel 15 of the bottle transport device 8 rotates in the direction of the arrow shown in FIG. 1 in synchronization with the main shaft of the label mounting device 3 and holds the bottle B delivered from the label mounting head 20 of the label mounting device 3. It is conveyed toward the conveyor 16. The bottle holding recesses 15 a formed on the periphery of the star wheel 15 are formed at equal intervals with the interval of the label mounting head 20 of the label mounting device 3. The conveyor 16 is driven by a conveyance motor (not shown) and carries out the bottle B received from the star wheel 15 toward the downstream process.

FIG. 2 is a diagram illustrating a state of the label expansion unit 30 in the label mounting head 20. The label expansion unit 30 is a device that receives the label L from the label delivery device 7 and opens it into a cylindrical shape, and then expands the cylindrical label L to the extent that the bottle B can be inserted. A label expanding unit that receives the label L from the label delivery device 7 and opens it in a cylindrical shape is provided above the label expanding unit 30, and a bottle lifting unit that lifts and lowers the bottle B is provided below the label expanding unit 30. Provided. In addition, a clamp portion that clamps and holds the bottle B and the label L is provided between the label expanding portion and the label expanding portion 30.

The label extension 30 includes a base 32, a cam plate 34 provided on the base 32, an upper plate 36 provided on the cam plate 34, and a diameter expansion claw 50 disposed on the upper plate 36. Is done. The base 32, the cam plate 34, and the upper plate 36 are all annular members having an opening 38 on the central axis. The opening 38 is a penetrating portion in order to move up and down the bottle B that is a target container to which the label L is attached.

The base 32 is a member for attaching the label mounting head 20 to the label mounting apparatus 3. The cam plate 34 is an annular member in which the cam groove 40 is provided. The cam plate 34 is rotated forward and backward by a drive motor (not shown). The cam groove 40 provided in the cam plate 34 is a groove for moving the enlarged claw 50 in the radial direction of the upper plate 36. One cam groove 40 is provided for each diameter-enlarging claw 50.

The upper plate 36 is an annular member that arranges a plurality of diameter-enlarged claws 50 in a circumferential direction. In the example of FIG. 2, since eight diameter expanding claws 50 are used, the diameter expanding claws 50 are arranged radially at equal intervals in the circumferential direction at intervals of 45 degrees. Thus, the upper plate 36 corresponds to a base on which the diameter-enlarged claws 50 are arranged radially. For the arrangement of the diameter-enlarging claws 50, guide grooves 42 provided radially in the radial direction on the upper plate 36 are used. Unlike the cam plate 34, the upper plate 36 does not rotate.

The diameter-enlarging claw 50 includes a slide plate 52, a claw portion 54, a plate spring 58 that is an elastic body extending on the claw portion 54, and a cam pin 56 provided on the slide plate 52.

The slide plate 52 is a guide plate that is supported by the guide groove 42 of the upper plate 36 and is movable in the radial direction of the upper plate 36. The slide plate 52 may be a single plate material or a combination of a plurality of plate materials. The claw portion 54 is a shaft member that extends from the one side end portion of the slide plate 52 along the axial direction. Here, the axial direction is a direction parallel to the central axis of the opening 38 of the label extension 30. The claw portion 54 is integrated with the slide plate 52. For the integration, the same member may be processed into an L shape to form the claw portion 54 and the slide plate 52, or the claw portion 54 and the slide plate 52 may be made of different members, and these may be assembled and integrated. .

A leaf spring 58 is provided further to the tip side from the tip of the claw portion 54. The leaf spring 58 is set so that the axial length in the natural state exceeds the axial length of the label L when combined with the axial length of the claw portion 54 measured from the upper surface of the slide plate 52. The Since the leaf spring 58 is an elastic body, for example, even if the claw portion 54 cannot be lengthened due to problems of strength and durability to cope with the length in the axial direction of the long label L, the diameter-enlarging claw The axial length from the upper surface of the 50 slide plates 52 can exceed the axial length of the label L.

As shown in FIG. 2, the plurality of leaf springs 58 are preferably shaped such that their distal ends are bent toward the inner peripheral side. In this case, the shape of the natural state is set so that the front ends of the plurality of leaf springs do not cross each other so that the head of the container can be easily received. The length in the axial direction of the leaf spring 58 in the natural state is for the position of the bent tip. Further, since the plate spring 58 may be an elastic body, it may be a spring bar. The thickness of the elastic body such as a leaf spring provided on the tip side of the claw portion 54 is preferably equal to or thinner than that of the claw portion 54. Further, the leaf spring 58 may not be provided connected to the tip of the claw portion 54 but may be provided so that the tip side of the leaf spring protrudes from the claw portion 54 so as to overlap the outer surface of the claw portion 54.

The cam pin 56 is a pin that protrudes below the slide plate 52 and fits into the cam groove 40 of the cam plate 34. The cam pin 56 can be a pin that penetrates the slide plate 52. In that case, the head of the cam pin 56 also appears at the top of the slide plate 52. In FIG. 2, the head of the cam pin 56 is shown in the upper part of the slide plate 52.

Therefore, when the cam plate 34 rotates, the cam pin 56 is driven along the locus of the cam groove 40. Since the slide plate 52 on which the cam pin 56 is arranged is guided by the guide groove 42 so as to be movable only in the radial direction of the upper plate 36, the slide plate 52 moves in the radial direction of the upper plate 36 when the cam plate 34 rotates. . Since the claw portion 54 is integral with the slide plate 52, the claw portion 54 moves in the radial direction of the upper plate 36 after all when the cam plate 34 rotates.

If the enlarged-diameter claw 50 moves to the outer peripheral side of the upper plate 36 when the cam plate 34 rotates in the forward direction, when the cam plate 34 rotates in the reverse direction, that is, in the direction opposite to the normal rotation, that is, The diameter-enlarging claw 50 moves to the circumferential side. Thus, by changing the rotation direction of the cam plate 34, the diameter-enlarging claw 50 can be moved to the outer peripheral side or the inner peripheral side of the upper plate 36.

Therefore, when receiving the label L in order to expand the label L, the diameter expansion claw 50 is moved to the inner peripheral side, and when the label L is stretched in the radial direction and the bottle B is inserted therein, the diameter expansion is performed. The nail | claw 50 is moved to the outer peripheral side. The position of the former diameter-enlarging claw 50 is referred to as a reduced diameter position, and the position of the latter diameter-enlarging claw 50 is referred to as an enlarged diameter position. The diameter-enlarging claw 50 is a member that is movable in the radial direction of the upper plate 36 between a diameter-reduced diameter position that receives the label L and a diameter-expanded diameter position that extends the label L.

FIG. 3 is a diagram showing a state of the diameter-enlarging claw 50 when the label L shown as L60 is attached to the bottle B. A sectional view is shown on the lower side of FIG. 3, and a top view showing the slide plate 52, the claw portion 54 and the leaf spring 58 is shown on the upper side. The position of the diameter-enlarging claw 50 is set to the diameter-reducing position. The label L shown as L60 is the one received from the label expanding portion, and the label L cut from the label base material S is opened in a cylindrical shape. As shown in FIG. 3, the axial length of the diameter-enlarging claw 50 from the upper surface of the slide plate 52 is set to a length exceeding the label length, which is the axial length of the label L.

FIG. 4 is a diagram showing a state of the label L at the sealing position 68 when the label L shown as L60 is placed on the diameter-enlarging claw 50 at the diameter-reducing position. The sealing position 68 of the label L means that when the printed sheet-like film is folded along the axial direction and both side edges are joined to form a cylindrical label base material S, the folded and stacked adhesive or heat It is a joining position with a width of about 1 to 8 mm joined by a seal. As described above, the seal position 68 indicates a linear position having a width of about 1 to 8 mm extending along the axial direction of the label L. One cylindrical label L has one sealing position 68, but folding the seal position close to the side edge also folds the opposite side as shown in FIG.

The seal position 68 of the label L is different from the other portions, and the film is overlapped and the sealing process is performed, so that it is often thick and hard. As a result, the friction when contacting the bottle B is greater than that of other portions. Therefore, the sealing position 68 is adjusted to the position of the claw 54 so that the sealing position 68 can slide on the claw 54 or the leaf spring 58 without contacting the bottle B. Further, since the seal position 68 is also different in elasticity from other parts, it is convenient to align the claw part 54 with less influence on the other parts of the label L.

Actually, when the label expanding portion of the label mounting head 20 receives the label L in the label delivery device 7, the seal position 68 of the label L is set to one of the plurality of claws 54 of the label expanding portion 30. Positioning is performed in advance so as to match. That is, when the label expanding unit receives the label L in the label delivery device 7, the label L is substantially positioned at the seal position 68. Of course, a separate seal position detection sensor may be provided for the sake of certainty.

FIGS. 5 to 8 are diagrams for explaining the procedure of attaching the label L to the bottle B. FIG. FIG. 5 is a diagram showing FIG. 3 as a model, and shows a state in which a label L indicated as L60 is arranged with the diameter-enlarged claw 50 as a diameter-reduced position. L60 is a label L that has not yet been stretched in the radial direction. As shown in FIG. 5, the axial length of the diameter-enlarging claw 50 is set longer than the height of the label L.

FIG. 6 is a view showing a state when the diameter-enlarged claw 50 is set to the diameter-enlarged position. In order to place the diameter-enlarging claw 50 in the diameter-enlarged position, the cam plate 34 is rotated and the cam pin 56 is moved to the outer peripheral side. At this time, the portion of the label L having a height corresponding to the claw portion 54 of the diameter-enlarged claw 50 is uniformly stretched in the radial direction by the strength of the claw portion 54. The label L has a tapered shape on the tip side of the claw portion 54 due to the balance with the elasticity of the leaf spring 58, and the dimension on the foremost side is almost equal to the diameter of the label L60 in FIG. Same or a little bigger. Thus, the label L is in a state shown as L62 in FIG.

FIG. 7 is a diagram showing a state in which the bottle B rises in the state of FIG. As shown in FIG. 6, the label L shown as L62 is narrower than the outer shape of the body of the bottle B because the dimension of the opening on the most distal side is the same as the diameter of L60. In this state, when the bottle B rises, the bottle B and the label L adhere to each other at the shoulder portion of the body portion of the bottle B. At this time, in order to prevent the label L from being displaced with respect to the expansion claw 50 due to the rise of the bottle B, the lower end of the label L may be temporarily sandwiched between the claw portion 54 and a separate clamp. . In FIG. 7, the label L in a state when the bottle B is inserted is shown as L64. When the bottle B rises and the upper end of the label L reaches the preset label mounting position, the clamp unit 70 that has been waiting until now proceeds in the radial direction, and the bottle B that does not overlap the claw 54 or the leaf spring 58 At the shoulder, the bottle B and the label L are clamped and held. The clamp part 70 moves in the axial direction in synchronization with the elevation of the bottle B.

Further, when the bottle B continues to rise, the label L moves upward while sliding on the claw portion 54 of the diameter expansion claw 50 and the outer periphery of the leaf spring 58. Further, as the bottle B continues to rise, the label L moves away from the diameter-enlarging claw 50 and comes into close contact with the surface of the bottle B, thereby completing the mounting of the label L on the bottle B. In the figure on the left side of FIG. 8, the label L in such a state that it is mounted on the surface of the bottle B is shown as L66.

8 is a comparative view showing a mounting state of the bottle B and the label L when only the claw portion 54 is used without using the leaf spring 58. FIG. Since the axial length of the claw portion 54 is shorter than the axial length of the label L, the label L contacts the surface of the bottle B at the tip of the claw portion 54 when the bottle B continues to rise. Since the label L is highly extensible, the degree of elongation varies depending on whether or not the claw portion 54 is in contact with the surface of the bottle B. Therefore, as shown in the diagram on the right side of FIG. 8, in the circumferential direction of the upper end of the label L, the shape of the label L does not align straight but becomes uneven.

On the other hand, when the plate spring 58 is used at the tip of the claw portion 54 so that the axial length of the diameter-enlarging claw 50 is longer than the axial length of the label L, the label L is formed between the claw portion 54 and the plate spring 58. It slides over and does not come into contact with the surface of bottle B in this part. It is easier to align the surface state of each claw 54 and the surface state of the leaf spring 58 than to align the surface state of the bottle B. Further, the label L is expanded through the leaf spring 58 to the upper end thereof. Therefore, even if the label L is highly extensible, the degree of extension can be made uniform, and the shape of the label L is aligned straight in the circumferential direction of the upper end of the label L as shown in the right side of FIG. Can be.

In the above description, the leaf spring 58 has been described as an elastic body provided on the tip side of the claw portion 54. Instead of this, as shown in FIG. 9, a cylindrical cross 59 knitted to be stretchable may be used as the elastic body. Since the cross-shaped lower end of the cross 59 is joined to the tips of all the claw portions 54, the cross 59 is stretched between the claw portions 54 and the label L Can be extended. As the stretchable cloth 59, for example, one knitted in a cylindrical shape using a nylon thread can be used. Plastic yarn made of a material other than nylon may be used.

In the claw portion 54 of the diameter-enlarging claw 50 and the elastic body provided on the tip side thereof, the outer surface that slides with the label L is preferably subjected to a surface treatment that provides low frictional resistance.

If the value of the frictional resistance between the enlarged diameter claw 50 and the label L is reduced, the absolute value of the variation in frictional resistance between each enlarged diameter claw 50 and the label L is reduced. As a result, the variation in position along the axial direction in the circumferential direction of the upper end can be further reduced.

The label mounting apparatus according to the present invention can be used in a system and apparatus for mounting a cylindrical label having extensibility on a container.

DESCRIPTION OF SYMBOLS 1 Label mounting system 2 Bottle supply apparatus 3 Label mounting apparatus 4 Label production | generation apparatus 5 Label base material supply apparatus 6 Label conveyance apparatus 7 Label delivery apparatus 8 Bottle conveyance apparatus 9

Folding change apparatus

11,16 Conveyor 12

Screw conveyor

13,15

Star wheel

13a, 15a Concave portion 14 Spindle 18 Base material feeding portion 20 Label mounting head 30 Label expansion portion 32 Base portion 34 Cam plate 36 Upper plate (base)
38 Opening 40 Cam Groove 42 Guide Groove 46 Take-up Member 47 Arm 50 Diameter Expansion Claw 52 Slide Plate 54 Claw Portion 56 Cam Pin 58 Leaf Spring (Elastic Body)
59 Cross (elastic body)
68 Seal position 70 Clamping part

Claims

A label attaching device used for attaching a cylindrical extensible label to a container,
Between the diameter-reduced diameter-reduced position where the label is received in order to expand the label, and the diameter-expanded diameter-enlarged position where the label is stretched, which is radially arranged on a base having an opening in the central axis through which the container passes. A plurality of diameter-enlarging claws that are movable in the radial direction and extend in the axial direction;
An elastic body provided toward the distal end side from the distal ends of the plurality of diameter-enlarged claws;
The label mounting device is characterized in that a length obtained by combining the axial length of the diameter-enlarging claw and the axial length of the elastic body exceeds the axial length of the label.