JP2021176764A - Film sticking device and film sticking method - Google Patents

Abstract

To enable sticking of a film to a container noncircular in a cross section while suppressing a cost increase or control complexity.SOLUTION: A film sticking device 100 comprises a sticking drum 23 that rotates while holding a pasted film F, and sticks the film F to a rotating container X. The sticking drum 23 includes a start end holding unit 231 that holds a sticking start end Fa set at one end of the film F, and a tail end holding unit 232 that holds a sticking tail end Fb set at the other end of the film F. The film F is held between the start end holding unit 231 and the tail end holding unit 232 so as to be deformable in a normal direction.SELECTED DRAWING: Figure 3

Description

The present invention relates to a film affixing device and a film affixing method for affixing a film to a container.

As a conventional film pasting device, there is one provided with a sticking drum that rotates while adsorbing and holding the front surface of the film glued on the back surface. According to such a film affixing device, the film is wound and attached to the outer peripheral surface of the container by rotating the affixing drum and rotating the container while touching the back surface of the film.

By the way, when the cross section of the container is, for example, rectangular, the radius of gyration of the corners when the container is rotated becomes longer than the radius of gyration of the other portions. From this, when determining the relative position between the container and the sticking drum, if the corners hit the film, the other parts will not hit the film, and conversely, if you try to hit the other parts against the film, The corners may get stuck in the sticking drum and the container may not rotate or sticking may be defective.

The fact that the radius of gyration differs depending on the location of the container is not limited to a container having a rectangular cross section, but can be said to be common to containers having a non-circular cross section, such as a polygonal or elliptical cross section. Is.

Therefore, in the film affixing apparatus shown in Patent Document 1, a part of the outer peripheral surface of the affixing drum is recessed inward in the radial direction to form a recess, and when the container is rotated, a portion having a long radius of gyration is the recess. It is configured to escape to.

However, in such a configuration, since the concave shape must be changed for each container shape, it is necessary for the user who attaches the film to the containers of various shapes to prepare the attachment drum according to the shape of each container. This leads to an increase in cost.

Even if various sticking drums can be prepared, in order to rotate the container along the outer peripheral surface of the sticking drum, the speed at which the container and the sticking drum are rotated must be changed for each shape of the container. This causes complexity and increases costs.

Japanese Unexamined Patent Publication No. 2008-308198

Therefore, the present invention has been made to solve the above problems at once, so that the film can be attached to a container having a non-circular cross section while suppressing an increase in cost and complexity of control. The main task is to do.

That is, the film sticking device according to the present invention is a film sticking device provided with a sticking drum that rotates while holding the glued film, and sticks the film to a rotating container, and the sticking drum is one end of the film. The start end holding portion for holding the sticking start end portion set on the portion and the end holding portion for holding the sticking end portion set on the other end portion of the film, and the start end holding portion and the end holding portion It is characterized in that the film is held in a state of being deformable in the normal direction.

According to the film attaching device configured in this way, the film is held in a state of being deformable in the normal direction, so that the film can be released in the normal direction when a portion having a long radius of gyration in the container hits the film. can. As a result, the film can be attached to containers having various shapes, so that the film can be attached to containers having a non-circular cross section while suppressing an increase in cost and complexity of control.

By the way, the portion having a long radius of gyration of the container has a higher rotation speed than the portion having a short radius of gyration, and if the speed of winding the film around this portion becomes faster, the film may be pulled and come off from the sticking drum.
Therefore, it is preferable to hold the film in a loosened state between the start end holding portion and the end holding portion.
With such a configuration, even if the film is pulled, it can be absorbed by the slack of the film, so that it is possible to prevent the film from coming off from the sticking drum during sticking.

If an attempt is made to hold the film at only two places, the start end and the end of the film, the upper edge of the film may hang down, especially in the case of a long film, and the film will be wrinkled.
Therefore, it is preferable that the sticking drum further has an intermediate holding portion for holding an intermediate portion between the pasting start end portion and the pasting end portion of the film.
In this case, the film can be held without hanging, and wrinkles can be prevented from occurring in the film.

The sticking start end portion and the sticking end portion of the film are glued to the back surface thereof in a held state, and then pressed against the outer peripheral surface of the container. Therefore, it is not desirable to be glued to the back surface of this intermediate portion, and it is also not desirable to press the intermediate portion against the container.
Therefore, it is preferable that the holding surface of the intermediate holding portion is located closer to the rotation center side of the sticking drum than the holding surface of the starting end holding portion and the holding surface of the end holding portion.
In this case, it is possible to prevent the film from being glued to the middle portion and also to prevent the intermediate portion from being pressed against the container, and it is possible to reduce the film sticking defect.

It is preferable that the film holding force of the intermediate holding portion is weaker than the film holding force of the starting end holding portion and the film holding force of the ending holding portion.
In this case, the film can be appropriately held by the intermediate holding portion without removing the film from the starting end holding portion and the ending holding portion.

The film sticking method according to the present invention is a film sticking method using a film sticking device provided with a sticking drum that rotates while holding the glued film and sticks the film to a rotating container. Between the start end holding portion that holds the sticking start end portion set at one end of the film and the end holding portion that holds the sticking end portion set at the other end of the film, the film is attached to the diameter of the sticking drum. This method is characterized in that it is held by the sticking drum in a state of being deformable in a direction.
According to such a film sticking method, the same action and effect as the above-mentioned film sticking device can be obtained.

According to the present invention configured as described above, the film can be attached to a container having a non-circular cross section while suppressing an increase in cost and complexity of control.

The schematic diagram which shows the whole structure of the film mounting apparatus of one Embodiment. The schematic diagram which shows the appearance of the sticking drum of this embodiment. The schematic diagram which shows the state which held the film on the sticking drum of this embodiment. The schematic diagram which shows the structure of the intermediate holding part of another embodiment.

Hereinafter, an embodiment of the film pasting apparatus according to the present invention will be described with reference to the drawings.

<Overall configuration>
As shown in FIG. 1, the film sticking device 100 of the present embodiment continuously sticks the film F to the containers X while transporting a plurality of containers X (PET bottles and the like). The container X has a non-circular cross section, and here, the container X is a square bottle having a rectangular cross section.

Specifically, as shown in FIG. 1, the film attaching device 100 controls the operation of the container transport mechanism 10 for transporting the container X, the film transfer mechanism 20 for transporting the film F to the container X, and the operation of these mechanisms. It is equipped with a device 30.

<Container transport mechanism 10>
The container transport mechanism 10 continuously transports a plurality of containers X, and as shown in FIG. 1, the container transport mechanism 10 carries in the container X in a state where the film F is not attached, and a carry-in means 11 and carries in the container X. A pulling means 12 that separates the container X at a predetermined interval, a transfer means 13 that transfers the separated container X to the sticking area Z to which the film F is stuck, and a unloading means that carries out the container X to which the film F is stuck. It is equipped with 14.

As an example of the carrying-in means 11 and the carrying-out means 14, for example, those configured by using a motor, an endless belt, or the like can be mentioned, and as an example of the pulling means 12, for example, a timing screw or a timing screw provided downstream of the timing screw is provided. It can be mentioned that it is configured by using a belt wheel.

The transfer means 13 includes a turret 131 that rotates around a predetermined rotation axis, a plurality of base cups 132 that are provided on the turret 131 and sequentially receive the containers X separated by the pulling means 12, and a servo that rotates the base cup 132. It is equipped with a motor (not shown) such as a motor. Then, by rotating the turret 131, the container X received by the base cup 132 reaches the attachment area Z, and by rotating the base cup 132 by the servomotor at that position, the film F is attached to the container X. Can be done.

<Film transfer mechanism 20>
The film transfer mechanism 20 transfers the film F to be attached to the container X to the attachment area Z.

Specifically, the film transfer mechanism 20 includes a film holding portion 21 that holds a large number of films F, a suction drum 22 that sucks up films F of a predetermined length one by one, and a sticking drum 23 that attaches the film F to the container X. And at least have.

The film holding unit 21 is for holding a large number of films F and sending those films F downstream. In this embodiment, it is a rotating body in which a large number of consecutive films F wound in a roll shape are set, and is a so-called film table that continuously sends the films F downstream while rotating. The film holding portion 21 is not limited to this, and various ones such as a fixed type so-called film hopper that accommodates a large number of films F divided one by one may be used.

The suction drum 22 is a rotating body that rotates while sucking and holding the film F that has been sent out from the film holding portion 21 and cut to a predetermined length, and delivers the film F to the sticking drum 23.

The sticking drum 23 is a rotating body that receives the film F that the suction drum 22 sucks and holds, rotates while sucking and holding the film F, and sticks the film F to the container X. Since the sticking drum 23 is characteristic in the present embodiment, a detailed configuration will be described later.

Further, the film transfer mechanism 20 further includes a melt coating device 24 arranged side by side in the vicinity of the sticking drum 23, and the melt coating device 24 applies glue to the back surface of the film F held by the sticking drum 23. It is configured to be applied.

<Control device 30>
In the control device 30, the component of the container transport mechanism 10 and the component of the film transfer mechanism 20 are interlocked in synchronization with each other, that is, the timing of transporting the container X to the sticking area Z and the timing of transporting the film F to the sticking area Z. The container transfer mechanism 10 and the film transfer mechanism 20 are controlled so as to be synchronized with the transfer timing.

The control device 30 is a computer provided with a CPU, a memory, an AD converter, and the like, and the operation of the container transfer mechanism 10 and the film transfer mechanism 20 is controlled by operating the CPU and the like according to a control program stored in the memory. It is configured to do.

Specifically, as a control example of the control device 30, a servomotor is used to rotate the base cup 132 described above once at the timing when the container X and the glued film F meet in order to attach the film F of the container X. An example of controlling the

<Detailed configuration of the sticking drum 23>
As shown in FIGS. 2 and 3, the above-mentioned sticking drum 23 attracts the surface of the film F to hold the film F, and a plurality of suction holes 23p are formed on the outer peripheral surface. The surface of the film F is a surface that faces outward in the radial direction while being attached to the container X.

More specifically, the sticking drum 23 has a start end holding portion 231 for holding the sticking start end portion Fa set at one end in the longitudinal direction of the film F and a sticking set at the other end in the longitudinal direction of the film F. It has a terminal holding portion 232 for holding the terminal portion Fb.

The start end holding portion 231 and the end holding portion 232 are ridges extending along the axial direction of the sticking drum 23 (that is, the width direction of the film F), and the tip surface facing outward in the radial direction holds the film F. The holding surfaces 23a and b. A plurality of suction holes 23p are opened in the holding surfaces 23a and b at equal intervals, for example, along the axial direction.

The holding surface 23a of the start end holding portion 231 and the holding surface 23b of the end holding portion 232 follow the same rotation locus, in other words, the diameter from the rotation center of the sticking drum 23 to the holding surface 23a of the start end holding portion 231. The distance along the direction is set to be equal to the distance along the radial direction from the rotation center of the sticking drum 23 to the holding surface 23b of the terminal holding portion 232. Then, the coating surface of the melt coating device 24 described above is provided on the rotation locus of these holding surfaces 23a and b. As a result, the sticking drum 23 is rotated to be glued to the back surface of the sticking start end portion Fa and the back surface of the sticking end portion Fb of the label.

A plurality of these start end holding portions 231 and end holding portions 232 are provided along the circumferential direction of the sticking drum 23 (four each in this embodiment), and are arranged at equal intervals along the circumferential direction, for example. There is.

Therefore, as shown in FIG. 3, the sticking drum 23 of the present embodiment is configured to hold the film F in a state of being deformable in the normal direction between the start end holding portion 231 and the end holding portion 232. There is.

More specifically, as shown in FIG. 2, the sticking drum 23 is radially inside (of the sticking drum 23) between the start end holding portion 231 and the end holding portion 232 with respect to the holding surfaces 23a and b. A recessed film escape space 23x is formed on the rotation center side). As a result, the surface of the film F is held so as to face the film escape space 23x. That is, in the film F of the present embodiment, the portion facing the film escape space 23x is not held and is not constrained in the radial direction, and this portion is held in a state in which it can be deformed in the radial direction.

The sticking drum 23 of the present embodiment is configured to hold the film F in a loosened state between the start end holding portion 231 and the end holding portion 232, in other words, the holding surface 23a of the start end holding portion 231 and the holding surface 23a. The separation distance of the holding surface 23b of the terminal holding portion 232 is configured to be shorter than the length of the film F in the longitudinal direction.

In order to loosen the film F in this way, the above-mentioned control is performed so that the rotation speed of the film F attracted and held by the sticking drum 23 is slower than the rotation speed of the film F sucked and held by the suction drum 22. The device 30 controls the rotation speeds of the sticking drum 23 and the suction drum 22.

Further, as shown in FIGS. 2 and 3, the sticking drum 23 here includes an intermediate holding portion 233 for holding an intermediate portion between the pasting start end portion Fa and the pasting end portion Fb of the film F.
The intermediate holding portion 233 here is located between the starting end holding portion 231 and the ending holding portion 232, but the arrangement thereof may be appropriately changed, and between the starting end holding portion 231 and the ending holding portion 232. The intermediate holding portion 233 may be provided at a plurality of locations of the above.

The intermediate holding portion 233 is a ridge extending in the axial direction (that is, the width direction of the film F) of the sticking drum 23, and the tip surface facing outward in the radial direction serves as the holding surface 23c for holding the film F. A plurality of suction holes 23p are opened in the holding surface 23c along the axial direction, for example, at equal intervals.

The holding surface 23c of the intermediate holding portion 233 rotates with a turning radius smaller than the rotation locus of the holding surface 23a of the starting end holding portion 231 and the holding surface 23b of the ending holding portion 232, in other words, the intermediate holding portion 233. The holding surface 23c is located closer to the rotation center side (inward in the radial direction) of the sticking drum 23 than the holding surface 23a of the start end holding portion 231 and the holding surface 23b of the end holding portion 232.

Further, the intermediate holding portion 233 is configured so that its film holding force is weaker than the film holding force of the start end holding portion 231 and the film holding force of the end holding portion 232. Specific embodiments for this include, for example, reducing the number of suction holes 23p of the intermediate holding portion 233 to be smaller than the number of suction holes 23p of the starting end holding portion 231 and the ending holding portion 232, and the intermediate holding portion 233. Examples thereof include a mode in which the suction force of the intake system connected to the suction hole 23p is weaker than the suction force of the intake system connected to the suction hole 23p of the start end holding portion 231 and the end holding portion 232.

<Effect of this embodiment>
According to the film attaching device 100 configured in this way, the film F is held in a state of being deformable in the normal direction, so that when the portion having a long turning radius in the container X hits the film F, the film F is moved in the normal direction. Can be escaped to. As a result, if the film F has a length that can be held by the start end holding portion 231 and the end holding portion 232, it can be attached to various containers X regardless of the shape, which increases the cost and complicates control. The film F can be attached to the container X having a non-circular cross section while suppressing the cost.

Further, since the film F is held in a loosened state between the start end holding portion 231 and the end holding portion 232, the film F is temporarily pulled when the film F is wound around a portion having a long radius of gyration of the container X. Even so, since the amount can be absorbed by the slack of the film F, it is possible to prevent the film F from coming off from the sticking drum 23 during the sticking.

Further, since the intermediate holding portion 233 for holding the intermediate portion of the film F is provided, the film F can be held without hanging, and wrinkles can be prevented from occurring in the film F after sticking.

Moreover, since the holding surface 23c of the intermediate holding portion 233 is located closer to the center of rotation than the holding surface 23a of the starting end holding portion 231 and the holding surface 23b of the end holding portion 232, the film F is glued to the intermediate portion. In addition, the middle part of the film F is not pressed against the container X, so that it is possible to reduce the sticking defect of the film F and the like.

<Other modified embodiments>
The present invention is not limited to each of the above embodiments.

For example, in the above-described embodiment, the film F is held in a loose state, but the film F may be held in a stretched state between the start end holding portion 231 and the end holding portion 232.
Even in this way, by making the middle part from the sticking start end portion Fa to the sticking end portion Fb of the film F face the film escape space 23x, the cross section is not formed while suppressing the increase in cost and the complexity of control. The film F can be attached to the circular container X.

Further, the separation distance between the start end holding portion 231 and the end holding portion 232 may be changed. That is, at least one of the start end holding portion 231 and the end holding portion 232 may be movable along the circumferential direction of the sticking drum 23.
With such a configuration, a common sticking drum 23 can be used for films F having various peripheral lengths.

In the above embodiment, the intermediate holding portion 233 extends in the axial direction, but as shown in FIG. 4, it may be provided in at least a part in the axial direction, for example, the upper end portion of the film F.

The container X does not necessarily have to have a rectangular cross section, and may have a polygonal or elliptical cross section, and further, the container X has a circular cross section. The film sticking device 100 may be used.

In addition, the present invention is not limited to the above-described embodiment, and it goes without saying that various modifications can be made without departing from the spirit of the present invention.

100 ... Film sticking device X ... Container F ... Film Fa ... Sticking start end Fb ... Sticking end 10 ... Container transport mechanism 20 ... Film transport mechanism 21 ... Film Holding part 22 ・ ・ ・ Suction drum 23p ・ ・ ・ Suction hole 231 ・ ・ ・ Starting end holding part 232 ・ ・ ・ End holding part 233 ・ ・ ・ Midway holding part 23x ・ ・ ・ Film escape space 23 ・ ・ ・ Pasting drum 24 ・・ ・ Melt coating device 30 ・ ・ ・ Control device

Claims (6)

It is a film pasting device that has a sticking drum that rotates while holding the glued film, and sticks the film to a rotating container.
The sticking drum
A start end holding portion that holds a sticking start end portion set at one end of the film, and a start end holding portion.
It has a terminal holding portion that holds the pasted terminal portion set at the other end of the film, and has a terminal holding portion.
A film affixing apparatus characterized in that the film is held in a state of being deformable in the normal direction between the start end holding portion and the end holding portion. The film sticking apparatus according to claim 1, wherein the film is held in a loosened state between the start end holding portion and the end holding portion. The film sticking apparatus according to claim 1 or 2, wherein the sticking drum further has an intermediate holding portion for holding an intermediate portion between the pasting start end portion and the pasting end portion of the film. The film according to claim 3, wherein the holding surface of the intermediate holding portion is located closer to the rotation center side of the sticking drum than the holding surface of the starting end holding portion and the holding surface of the end holding portion. Sticking device. The film sticking apparatus according to claim 3 or 4, wherein the film holding force of the intermediate holding portion is weaker than the film holding force of the starting end holding portion and the film holding force of the end holding portion. It is a film pasting method using a film pasting device that includes a sticking drum that rotates while holding the glued film and sticks the film to a rotating container.
The film is placed in the normal direction between the start end holding portion that holds the sticking start end portion set at one end of the film and the end holding portion that holds the sticking end portion set at the other end of the film. A film affixing method characterized by holding the film on the affixing drum in a deformable state.

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