JPH0620894B2 - How to attach a heat-shrinkable film to a container - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method of mounting a film such as a label on a container such as a bottle or a can.

[Conventional technology]

Attach a heat-shrinkable synthetic resin film with a trademark, a pattern, etc. to the body of a container such as a bottle or can, and use this as a label, or a label / container protective film, and in the case of a bottle, It has been widely practiced in the past to cover the periphery of the stopper at the bottle mouth with a part of the film so as to also serve as a cap seal.

As a method of mounting a heat-shrinkable film (hereinafter, “film”) on a container, the film is formed into a tube shape in advance, and after it is fitted around the container, heat-shrinking treatment such as hot air blowing is performed. The method of applying and adhering to the surface of the container has been widely used in the past. However, in this method, a tube (which is usually folded and supplied flatly for convenience of storage and transportation) is fitted into the container. When it is inserted, it requires a relatively difficult and cumbersome operation for expanding the tube from a flatly folded state into a tubular shape, and there is a problem that the tube is likely to be bent or turned over while the tube is being inserted into the container.

Instead of the above method of fitting the film tube into the container,
Wrap the film around the surface of the container and overlap the front edge and the rear edge of the film, join the overlapping surfaces to form a tube, and heat-shrink it to bring it into close contact with the container surface. Thus, the above-mentioned difficulties can be solved, and at the same time, the step of molding the tube and the step of fitting the tube into the container can be achieved simultaneously as one step on the surface of the container, reducing the number of steps. , Productivity is improved. A method shown in FIG. 8 has been proposed as a method for mounting the film (Japanese Patent Laid-Open No. 60-158025). FIG. 9 shows a film winding step according to the same method. In the figure, (15
(0) is a rotary drum having a vacuum suction hole (151),
0) is a container holder. The container (B) is held by the holding table (160) and substantially abuts on the peripheral surface of the rotary drum (150), and the supporting table (16)
Due to the rotation of (0), the rotating drum (150) is rotating at a peripheral speed equal to the peripheral speed. The film (F) is fed from the film supply roller (170), is fed through the guide roller (180) between the rotary drum (150) and the pressing roller (190) abutting on the peripheral surface thereof, and is fed to the rotary drum (150). ) Is adsorbed and held (FIG. 9 [I]). The film (F) adsorbed and held on the rotating drum (150) is transferred toward the container (B) as the rotating drum (150) rotates, and the front edge portion (F1) of the film (F) is moved to the container (B). When reaching the position of contacting the side surface of B), the front end edge portion (F1) adheres to the side surface of the container (B) by the adhesive force of the adhesive applied to that portion in advance. Front edge
The film (F) having (F1) adhered to the surface of the container (B) is wound around the container (B) while being peeled off from the peripheral surface of the rotating drum (150) as the container (B) rotates. (Fig. 9 [II]). When the container (B) makes one revolution and returns to the position where the front edge (F1) of the film overlaps the rear edge (F2), the front edge (F1) and the rear edge (F2) are overlapped. Are joined (Fig. 9 [III]). The film (F) wound up in the container is then subjected to heat shrinkage treatment.

[Problems to be solved by the invention]

In the above film mounting method, when the container (B) has a columnar shape having a uniform cross-sectional diameter from the lower part to the upper part, the film can be easily wound around it. However, it is extremely difficult to successfully wrap the film around an irregularly shaped container, such as a gourd-shaped container, a drum-shaped container, or a polished container, which has a recessed portion or a bulged portion and whose sectional diameter changes partially. . That is, unlike the case of the cylindrical container, as shown in FIG. 10, when the film (F) is wound around the irregularly shaped container (B), the container (B) is rotated around the peripheral surface of the rotating drum (150). It is only the bulging part (B1) that the front end edge part (F1) of the film (F) on the rotary drum (150) can be adhered to the container (B) substantially by contacting with the container (B1). Since the engagement state of the film with respect to (B) is extremely unstable, the film is liable to roll over or turn over during winding, and in some cases, the adhesive portion (a) peels off and falls off the container surface. Even if the film (F) can be successfully wrapped around the container, it is not easy to join the overlapping surfaces of the front edge (F1) and the rear edge (F2) of the film (F). . In the case of a cylindrical container, the entire superposed surfaces can be joined by pressing the superposed front end edge (F1) and rear end edge (F2) from the outside to the side surface of the container (B). However, in the case of an irregularly shaped container, only the part facing the bulging part can be pressed and joined to the container, and the overlap is located in the part where there is a gap between the film (F) and the container (B). This is because the mating surfaces cannot be joined.

The present invention provides a film mounting method for solving the above problems.

[Means for solving problems]

The film mounting method of the present invention is a container held on a container holder (50) by stacking a plurality of contact plates (30) on the inside of a film guide plate (10) whose outer surface is a vacuum suction surface. The front end edge portion (F1) of the film (F) fed to the container on the container holder (50) from the film feeding device (70) by vacuum suction of the film guide plate (10). The surface of the film guide plate (1) that holds the front edge of the film (F1) by suction
0) and the pad plate (30) inside thereof are rotated around the container on the container holder, and the pad plates (30) are rotated one by one during the rotation process and are arranged at substantially equal intervals around the container. The process of making the film guide plate (10) circulate around the container while leaving it in the position of, the film front edge (F1) held on the vacuum suction surface of the film guide plate (10) circling around the container And a step of forming the film (F) into a tube by joining the overlapping surfaces of the film rear end edge portion (F2) and the film (F) formed on the tube and the container. The film guide plate (10) and the backing plate (30) are removed from the space between them, and the film (F) is subjected to heat shrinkage treatment.

[Action]

According to the present invention, the film is sucked and held by the film guide plate (10) by the vacuum suction force and is wound around the container by the rotating operation thereof. Therefore, it goes without saying that the film has a cylindrical shape. Therefore, even in the case of a container having a different shape, there is no possibility that the film (F) will fall off during the winding process and the winding process will not be damaged.

Further, the film (F) wound around the container by the rotation of the film guide plate (10) is backed up from the inner side surface by the backing plate (30) left at an appropriate interval around the container during the winding process. Therefore, regardless of the shape of the container, the container is kept in a stable cylindrical shape and does not turn over or turn over.

Further, after the film (F) is wound around the container by the film guide plate (10) making one round around the container, the front edge (F1) and the rear edge (F2) of the film (F) are overlapped. In the process of joining the mating surfaces, the film guide plate (10) serves as a backing plate, and by pressing the overlapping portion against the plate surface of the film guide plate (10), regardless of the presence of irregularities on the container surface. It is possible to reliably bond the entire overlapping surface.

〔Example〕

An embodiment of the method of the present invention will be described with reference to FIGS.
1 to 6 show the step of winding the film (F) around the container (B) held on the container holding table (50), and FIG. 7 shows the process of winding the film (F) around the container (B) and the tube. It shows a step of subjecting the film (F) to heat shrinkage treatment after being molded into.

The film guide plate (10) is a hollow flat plate having an appropriate width and length and having two rows of vacuum suction holes (11) on its outer surface. The film guide plate (10) is connected to an elevating / rotating drive mechanism (not shown) via a support member (20) attached to the base of the film guide plate (10), and the side surface of the container (B) on the container holding table (50). Is repeatedly moved up and down between a position facing the container (B) and a position separated downward from the container (B), and at a position facing the side surface of the container (B), the container (B) is rotated at a predetermined speed. Move. The support member (20) has a hollow hole forming a part of the vacuum suction path, and the vacuum suction surface of the film guide plate (10) attached to the support member (20) passes through the hollow hole of the support member (20). Is connected to a vacuum suction system, and vacuum suction on / off control is performed at appropriate times.

The backing plate (30) is a flat plate-like body having an appropriate width and length, and a plurality of sheets (an example of four sheets is shown) are set as a set and stacked on the inside of the film guide plate (10). The positional relationship is adjusted. Each backing plate (31, 32, 33, 34) is a support member (41, 42,
43, 44), and an ascending / descending / rotating drive mechanism (not shown) connected via a supporting member to the film guide plate (10) to raise or lower the film guide plate (10). In the process of rotating around the container (B) following the step 10), an appropriate interval is provided around the container (B) (usually at substantially equal intervals), and one from the inner one ,
The rotation operation and the rotation stop control are performed so that the rotation is sequentially stopped and left at that position.

(70) is a film feeding device, and (60) is a film supply roller. The film feeding device (70) includes a rotating roll (71,
72) and a belt (73) stretched around it. The belt (73) has a film suction surface (for example, by vacuum suction force), sucks and holds the film (F) fed from the film supply roller (60), and holds the container holding table (50).
Feed towards upper container (B). Belts (73)
The suction action of the belt (73) so that the film (F) sucked and held by the sheet (F) is smoothly transferred from the surface of the belt (73) to the vessel (B) when the film (F) approaches the side surface of the vessel (B). Are stopped near the side surface of the container (B). A film cutting cutter (not shown) is arranged between the film supply roller (60) and the film supply device (70), and the film supply roller (60) extends the film supply device (70). The long film (F) supplied to (1) is cut into a predetermined length dimension according to the size of the container (B) and is fed to the container (B).

Reference numeral (80) is a film pressing device, and a pressing surface portion (81) protruding at the front end thereof has a built-in heater for heat-sealing the superposed surface of the film (F) wound around the container. The film pressing device (80) is connected to a slide mechanism (not shown), and moves back and forth with respect to the side surface of the container (B) at appropriate times.

In the above apparatus, when the container (B) is placed and fixed on the container holder (50), the film guide plate (10) and a plurality of pad plates (31, 32, 33, 34) inside the film guide plate (10). ) And () are superposed on each other, rise from below and stop at a position facing the side surface of the container (B). On the other hand, the film (F) wrapped around the container is fed from the film supply roller (60) to the film feeding device.
It is adsorbed and held on the surface of the belt (73) of (70) and fed toward the container (B). When the front edge portion (F1) of the film (F) on the belt fed toward the container (B) approaches the vicinity of the film guide plate (10), the suction action of the belt surface at that portion stops. , The front edge portion (F1) of the film is released from the suction force to the surface of the belt (73) and is suction-held to the outer surface of the film guide plate (10) by the vacuum suction force (the first surface). (Fig. 2, Fig. 2). At this time,
The front end edge portion (F1) of the film (F) is, as shown in FIG. 3 [I], one of the two rows (11a) and (11b) of vacuum suction holes (in this embodiment, it faces away). Is held by suction by the suction force of the left column (11a)), and the other vacuum suction hole column (11b)
Is in a released state for adsorbing and holding the trailing edge (F2) of the film.

At the same time that the front edge portion (F1) of the film (F) is adsorbed and held by the film guide plate (10), the film guide plate (10), together with the backing plate (30), travels the belt (73) at a speed Begins to rotate around the container (B) at a speed equal to (Fig. 3). In the example of the figure, it rotates counterclockwise. Pad (31,32,33,34)
Is a rotating process that follows the film guide plate (10),
The film (F) wrapped around the container is backed up from the inside by stopping one by one from the inner one at a predetermined position and leaving the film around the container (B) at substantially equal intervals (FIG. 4). , FIG. 5). The innermost contact plate (31) may not be rotated and may be kept stopped at the initial position as illustrated.

When the film guide plate (10) makes one round around the container (B) and returns to the original position, the film guide plate (10) becomes a belt.
It faces the rear edge (F2) of the film (F) on the (73) surface,
The rear end edge portion (F2) is separated from the surface of the belt (73) and the vacuum suction hole array (11b) (third part) in which the film guide plate (10) remains released.
(See FIG. [I]), and the edge of the rear edge (F2) overlaps with the front edge (F1) (FIG. 5).

When the front end edge portion (F1) and the rear end edge portion (F2) of the film (F) are attracted to and overlap with the film guide plate (10), the film guide plate (10) causes the contact plates (31, 32, 33, 34) rotate around the container (B) while maintaining their positional relationship with each other, and stop at a position facing the film pressing device (80). In this case, in order to avoid friction between the film (F) and the surface of the container (B), the film guide plate (10), the contact plates (31, 32, 33, 34) and the container holder ( 50) may be rotated. The film guide plate (10) is the film pressing device (80)
When stopped at the front of the film, the film pressing device (80) advances toward the film guide plate (10), and the pressing surface part (81) of the film pressing device (80) moves to the front edge (F1) and the rear edge (F2) of the film (F). The superposed surface of () is pressed so as to be pressed against the surface of the film guide plate (10) (Fig. 6). Thereby, in the film (F), the overlapping surfaces are joined (heat-bonded in this case) to form a tube.
The superposed surfaces of the film (F) may be joined with an adhesive. In this case, an adhesive is applied between the overlapping surfaces of the film (F) using an appropriate adhesive applying jig, and then the overlapping surfaces are pressed by the pressing device (80) (of course,
In this case, the pressing surface portion (81) does not need to have a heater built therein).

When the overlapping surfaces of the film (F) are joined, the pressing device (80) retreats rearward, and the film guide plate (10) and each of the contact plates (31, 32, 33, 34) move to the film (F). And between the container and the container (B). Then, the container (B) is held on the container holding table (50) or is unloaded from the holding table (50) for heat shrinkage treatment by the hot air blowing device (90) as shown in FIG. Then, the film (F) is attached to the surface of the container (B) to be finished in a predetermined mounting mode.

〔The invention's effect〕

According to the method of the present invention, if the container has a simple cylindrical shape, of course, even for irregularly shaped containers having irregularities, the film does not fall off, turn over, shift, etc. Good and accurate winding is possible, and the appearance can be finished in a good fitting state. Further, since the method of the present invention is carried out by controlling the rotation / elevation of one film guide plate having a vacuum suction surface and a plurality of (usually about 3 to 5) contact plates, The structure is simple and compact, and has high practical value.

[Brief description of drawings]

1 to 6 are process explanatory views showing an embodiment of a film winding process according to the method of the present invention (in each figure, [I] is a front view, [II] is a plan view), and FIG. 7 is a heat shrinking treatment. 8 is a front view showing the steps, FIG. 8 is a front view showing a conventional film winding method, FIGS. 9 [I] to [III] are plan explanatory views showing the film winding step by the conventional method, and FIG. 10 is an irregular shape. It is a principal part front view which shows the film winding condition by the conventional method with respect to a container. 10: Film guide plate, 11, 151: Vacuum suction hole, 30 (31, 32, 3
3,34): backing plate, 50,160: container holder, 60,170: film supply roller, 70: film feeding device, 73: belt, 8
0: Film pressing device, 90: Hot air blowing device.

Claims (1)

[Claims] 1. A vacuum of the film guide plate, wherein a plurality of abutting plates are superposed on the inside of the film guide plate whose outer surface is a vacuum suction surface and are placed opposite to the side surface of the container held on the container holding table. A process for adsorbing and holding the front edge of the heat-shrinkable film (hereinafter, "film") that is fed to the container by the film feeding device on the suction surface, and a film guide plate that adsorbs and holds the front edge of the film. Rotating the inner cover plate around the container and leaving the cover plates one by one around the container at an appropriate interval while allowing the film guide plate to go around the container once, The film is formed into a tube by joining the overlapping surface of the film front edge held on the vacuum suction surface of the film guide plate and the film rear edge overlapped with the outer surface of the film guide plate. Step method from between the formed film and the container tube, pull the film guide plate and backing plate, mounting the tube film step of heat shrinking treatment, the heat-shrinkable film to a container made of.