JPH09272512A - Shrink-film-splicing method and device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shrink-film-splicing method and device which facilitates upper and lower film replenishment and enables the replacement of a film roll without stopping a shrink wrapping machine. SOLUTION: In a shrink-film-splicing method for wrapping an object in shrink films supplied from first and second rolls, a splicing operation is prepared by moving a roll of spare film 8 on a spare-film set base 9 by means of a first film holder 3 to an area where the operation can be carried out easily, and control is exerted so that when the rear end of the first roll being used reaches, the end of the spare film is connected to the end of the used first roll.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for sprinkling shrink films for shrink packaging, in which a member is sandwiched by shrink films supplied from first and second rolls and heat-shrinked in the next step.

[0002]

2. Description of the Related Art There is known a technique for packaging products such as lactic acid bacterium beverages in a certain number of units in a film (hereinafter referred to as shrink wrapping) from the viewpoint of transportation convenience and hygiene. And, the shrink wrapping described above has the upper roll (first
Rolls), the upper film (first film) and the lower film (second film) supplied from the lower film (second film) sandwiches a plurality of products. It is performed by a shrink wrapping machine that is heat-shrinked.

[0003]

However, the feeding work of the upper and lower film rolls is performed manually by a plurality of workers, and the film roll is heavy and a great burden to the workers, and However, there is a problem that the work efficiency is poor because it is necessary to stop the device for the roll replacement work.

Therefore, an object of the present invention is to provide a method and apparatus for shrink film splicing, in which the upper and lower films can be easily replenished and the film roll can be replaced without stopping the shrink wrapping machine.

[0005]

In the shrink film splicing method of the present invention, an object is sandwiched by shrink films supplied from first and second rolls, and the object is wrapped by heat shrinkage of the film. In a method for splicing a shrink film for shrink packaging, a roll-shaped spare film on a spare film set table is gripped by a first film holder, and an adhesive surface of a film end portion is directed to the suction means in an aspect. Moved above the roll of the first roll holder in use while holding it, and immediately before the film of the first roll in use runs out, the adhesive surface of the end of the preliminary film is near the film end of the first roll. It is characterized in that the roll-shaped preliminary film is moved to the first roll holder by being brought into contact with the position.

The adhesive surface of the film end may be formed by applying an adhesive to one surface of the film end to form an adhesive application surface on the film end.
Alternatively, an adhesive member such as a tape may be provided at the end of the film so that the film can be adhered.

Further, the shrink film splicing method of the present invention is a shrink wrap in which an object is sandwiched by the shrink films supplied from the first and second rolls, and the object is wrapped by heat shrinkage of the film. A method for splicing a shrink film for use in a roll-shaped preliminary film, which is arranged on a second film holder installed in parallel with a second roll in use and has an adhesive surface at its end. The surface of the second roll is held by the suction means in a state in which the surface of the second roll is in use, and immediately before the film of the second roll in use is exhausted, the adhesive surface of the end of the spare film is placed near the film end of the second roll. It is controlled so as to come into contact with the auxiliary film so that the preliminary film can be supplied.

Here, when performing the splicing (upper splicing) on the side of the first roll holder, the abutting means moves the trailing end of the film in use toward the end of the preliminary film. If the type of any one of the method of moving the end of the film toward the end of the film in use, the method of moving the end of the spare film and the end of the film in use toward each other. good. On the other hand, when performing the splicing (lower splicing) on the side of the second roll holder, the contact means is
Method of moving the end of the film in use toward the end of the spare film, method of moving the end of the spare film toward the end of the film in use, end of the spare film and end of the film in use It is possible to use a method in which and move to each other.

In the shrink film splicing device of the present invention, the shrink film is shrink-wrapped in which the object is sandwiched by the shrink films supplied from the first and second rolls, and the object is wrapped by the heat shrinkage of the film. In a film splicing device, a first film holder having a gripping means for gripping a roll-shaped spare film on a spare film setting table is provided so as to be vertically movable and rotatable, and the first film holder is a spare film. Is provided with a holding means for holding the film end portion, and a control board for controlling the first film holder is provided. Here, the first film holder may be provided with contact means for contacting the film end portion on the first roll holder and the end portion of the preliminary film.

Further, the holding means provided on the first film holder is composed of an air cylinder, and the first film holder is a screw rod driven by an electric motor and a female screw provided on the first film holder. It is movable up and down with and is attached so as to be rotated by a motor-driven worm and a worm wheel provided on the floor surface, and the film holder is provided with a vacuum ejector serving as a holding means for holding the end portion of the preliminary film, A control panel is provided to control the first film holder. In this case, it is preferable that the film holder is provided with an abutting means for abutting the end of the preliminary film and the end of the in-use roll at a fixed position.

The shrink film splicing device of the present invention is for shrink wrapping in which an object is sandwiched by the shrink films supplied from the first and second rolls, and the object is wrapped by heat shrinkage of the film. In the shrink film splicing device, holding means for holding the film end portion of the preliminary film, and contact means for contacting the film on the second roll holder with the end portion of the preliminary film on the second film holder. And a control panel for controlling the second film holder.

Here, the second film holder is the second
The roller holder and the roll axis are arranged side by side in parallel so as to be arranged in parallel, and the vacuum ejector serving as a holding means for holding the end of the preliminary film and the end of the preliminary film and the roll in use at a fixed position. It is preferable to provide a control panel for controlling the second film holder, which is provided with a contact means for contacting the end portion.

According to the present invention having the above-described structure, when the roll of the film supplied from the first roll holder is replaced or spliced, the roll shape on the preliminary film setting table is set by the first film holder. Holding the spare film, moving it above the roll of the first roll holder, and bringing the adhesive surface at the end of the spare film into contact with the portion near the film end of the first roll to form a roll-shaped spare film. Is moved to the first roll holder. Here, the conventional roll-shaped preliminary film is the first
No need to set it directly on the roll holder, and it is sufficient to place it on the preliminary film setting table, so the labor of moving the relatively heavy roll of the preliminary film to the upper part is saved.

According to the present invention, the work of placing the roll of the spare film for the first roll holder on the spare film set table and the mode in which the adhesive surface of the end of the spare film faces outward If only the work of holding the suction means is performed manually, the other steps or works are automated.

When changing or splicing the film supplied from the second roll holder, a roll-shaped preliminary film placed on the second film holder placed in parallel with the second roll in use. Is held by the suction means in such a manner that the adhesive surface of the end portion thereof faces the outside, and the adhesive surface of the end portion is brought into contact with the portion near the film end portion of the second roll to form the preliminary film. It is possible to supply. Then, only holding the end portion of the roll-shaped preliminary film on the suction means in the above-described manner is performed manually, and other operations are automated.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, in a shrink wrapping machine indicated by reference numeral 1 as a whole, an upper roll 2a which is a first shrink film roll is mounted on an upper roll holder 2 which is a first roll holder, and above the upper roll holder 2a. An upper film holder 3 which is a first film holder is provided in parallel with the upper roll 2a, and a preliminary film 8 is attached to the film holder 3.

Further, the upper film holder 3 is provided with an elevating device 4 configured to elevate and lower by a female screw screwed with a screw rod 5 driven by a motor, and a square shaft 7
The rotating device 6 for rotating the device is configured to rotate clockwise by half a circumference when viewed from above. In addition, reference numeral 9 is a preliminary film setting stand, 10 is a control panel, 11 is a lower roll holder which is a second roll holder, 12 is a lower roll holder which is a second film holder, and 13 is a film being supplied from an upper roll. , 14 have shown the heater part, respectively.

FIG. 2 shows a rotating device 6 for rotating the upper film holder 3, and a control for rotating the upper film holder 3 by 90 ° by 180 ° by a worm 15a engaged with a worm wheel 16 attached to the elevating shaft 5. It is driven by a motor 15 by a signal from the board 10.

FIG. 3 shows a mode in which the upper film holder 3 sets the preliminary film 8 on the roll holder 2. Reference numeral 2b is a roll driving roller, 8a is a film roll gripping device, 18 is a supporting member for supporting the upper end of the elevating shaft 7, and 19 is a film feeding roller.

FIG. 4 is a schematic view showing a cross section of the upper film holder 3 and a roll in use. An end of the preliminary film 8 is a vacuum pump (not shown) which is a suction means provided in the upper film holder 3. The state is shown in which the film 13 of the roll 2a in use, which is held by the vacuum ejector 21 connected to V, is supplied to the packaging unit (not shown) via the roller 19. Incidentally, reference numeral 20 is a contact device,
2b is a paper tube which is the axis of the roll, 3k is a film in use 2
Photocell for detecting the remaining amount of a, 4k is the film 2a in use
, A reflection plate, and 8c, an adhesive surface formed on an end portion of the film (for example, an adhesive surface of an adhesive tape provided on one side of the end portion).

In FIG. 5, the lower roll holder 11 that serves as the second roll holder and the lower film holder 12 that serves as the second film holder are installed adjacent to each other in parallel on the lower film set table 30 and are mutually The film roll 32 of the lower roll holder 11 is in use, and a spare film roll 38 is set in the lower film holder 12 in the figure. The lower roll holder 11 and the lower film holder 12 are set so as to be pulled out toward the front (in the arrow direction) by the guide rails 31L and 31R provided on the lower film setting table 30. Further, the lower roll holder 11 and the lower film holder 12 respectively include a pair of side members 33 and 36 and an upper member 3.
A vacuum ejector 35 is slidably provided on the upper member 34 in the left-right direction of the drawing by a cylinder (not shown). Reference numeral 37 indicates a reflection type photoelectric tube for detecting the film end portion of the roll.

Further, since the lower roll holder 11 and the lower film holder 12 are configured in contrast at the set position, they can be used alternately as the second roll holder 11 and the second film holder 12.

FIG. 6 shows a block diagram of control. The control panel 10 is composed of a control unit 10a composed of a microcomputer, a display unit 10b and an instruction unit 10c, and photoelectric cells 3k, 4k and 37, and a rotating device. 6, lifting device 4, gripping device 8a, vacuum ejectors 21 and 35
Are connected to the contact device 20 via electric circuits.

Hereinafter, with reference to FIGS. 7 and 8 to 18,
The operation will be described.

In operation, it is first judged from the signal from the photoelectric tube 3k whether or not the remaining amount of the film in use is below a predetermined value (step S1). If step S1 is NO, the process returns, and if YES, an instruction to request preliminary film preparation is displayed on the display unit (step S2, FIG. 8).

Then, it is judged whether or not the spare film is placed on the spare film set table 9 (step S3).
If NO, the process returns, and if YES, the upper film holder 3 is rotated (step S4, FIG. 9), lowered (step S5, FIG. 10), and stopped at the preliminary film setting table 9 (step S6). Then, the air cylinder of the holding device 8a of the holder is operated to hold the preliminary film (steps S7 and S8, FIG. 11).

Next, it is determined whether or not the operator has instructed the instruction section 10c to move to the film suction position (step S9). If NO, the process returns, and if YES, the film holder is raised, and the holder is rotated to stop at the work position where the end of the preliminary film is adsorbed (steps S10, 11, 12, FIG. 12 and FIG. 13). The operator operates the vacuum ejector 21 by instructing the instruction section of the control panel to cause the ejector to suck and hold the adhesive-free surface of the end portion (splice section) of the preliminary film (step S13,
(Fig. 14).

Then, it is judged whether or not the suction of the splice portion is completed (step S14). If NO, return
If YES, the holder is raised and rotated to stop at the splice position above the film in use (steps S15, 16, 17, FIG. 15). And photocell 4k
Determines whether the end of the film in use is detected (step S18). If NO, the process returns, and if YES, the cylinder of the abutment device 20 is actuated, the end of the film in use is brought into contact with the adhesive surface of the spare film to connect, and splicing is completed (steps S19, S20, FIG. 1
6).

After step S20, it is determined whether or not the operator has removed the paper tube of the used film (step S21). If NO in step S21, the process returns and YES.
If so, the holder is lowered and stopped at a fixed position, the roll holding device of the holder is released, the roll of the film holder 3 is set on the roll holder 2, and the film holder 3 is raised and stopped at the standby position. And the control ends (steps S22 to S26, FIGS. 16 to 18).

The operation of splicing the upper film semi-automatically by the upper film holder 3 and the upper roll holder 2 has been described above, but the lower film holder 12 and the lower roll holder 11 are installed adjacent to each other in parallel. As described above, steps S1, S2, S3, S12, S13, S14, S
Since it is configured to perform 18, S19, S20, the lower film can be spliced as well.

Therefore, the upper and lower films can be continuously supplied, the work can be continuously performed without stopping the packaging machine, and the roll replacement work can be safely and easily carried out at an easy-to-work location.

[0032]

Since the present invention is configured as described above, the upper and lower film rolls can be replenished and connected without stopping the wrapping machine, and the replenishment work of the rolls to the wrapping machine is a control panel. According to the display, the work can be done easily and can be set up in advance, so work efficiency is good and safety is improved.

[Brief description of drawings]

FIG. 1 is a perspective view of a shrink wrapping machine showing an embodiment of the present invention.

FIG. 2 is a perspective view showing the rotating device of FIG.

FIG. 3 is a perspective view showing a portion adjacent to a first film holder.

FIG. 4 is a schematic view showing a cross section of a first film holder and its related members.

FIG. 5 is a perspective view showing a second film holder and a second roll holder.

FIG. 6 is a block diagram of control.

FIG. 7 is a flowchart of control.

FIG. 8 is a diagram showing a first step of the upper (first) film splice.

FIG. 9 is a diagram showing a second step of the upper (first) film splice.

FIG. 10 is a diagram showing a third step of the upper (first) film splice.

FIG. 11 is a diagram showing a fourth step of the upper (first) film splice.

FIG. 12 is a diagram showing a fifth step of the upper (first) film splice.

FIG. 13 is a diagram showing a sixth step of the upper (first) film splice.

FIG. 14 is a diagram showing a seventh step of the upper (first) film splice.

FIG. 15 is a diagram showing an eighth step of the upper (first) film splice.

FIG. 16 is a view showing a ninth step of the upper (first) film splice.

FIG. 17 is a diagram showing a tenth step of the upper (first) film splice.

FIG. 18 is a view showing an eleventh step of the upper (first) film splice.

[Explanation of symbols]

 1 ... Shrink wrapping machine 2 ... First roll holder 3 ... First film holder 4 ... Lifting device 5 ... Screw rod 6 ... Rotating device 7 ... Square shaft 8 ... Spare film 8a ... Gripping device 9 ... Spare film setting stand 10 ... Control panel 11 ... Second roll holder 12 ... Second film holder 15 ... Motor 16 ... Warm wheel 20 ... Abutting device 21, 35 ... Vacuum ejector

Claims (6)

[Claims] 1. A method for splicing a shrink film for shrink wrapping, wherein an object is sandwiched by shrink films supplied from first and second rolls, and the object is wrapped by heat shrinkage of the film. The roll of the first roll holder in use while the roll-shaped preliminary film on the set table is gripped by the first film holder and held by the suction means with the adhesive surface of the film end facing outward. Immediately before the first roll film in use is run out, the adhesive surface of the end portion of the preliminary film is brought into contact with a portion near the end portion of the film of the first roll to remove the roll-shaped preliminary film. 1. A method of splicing a shrink film, characterized in that the shrink film is moved to one roll holder. 2. A method of splicing a shrink film for shrink packaging, wherein an object is sandwiched by shrink films supplied from first and second rolls, and the object is wrapped by heat shrinkage of the film. In a mode in which the adhesive surface of the roll-shaped preliminary film, which is arranged on the second film holder installed parallel to the second roll and has an adhesive surface at its end, faces the outside. It is possible to supply the spare film by holding the film on the suction means and bringing the adhesive surface of the end portion of the spare film into contact with a portion near the end portion of the film of the second roll immediately before the film of the second roll in use runs out. A method for splicing a shrink film, which is characterized in that it is controlled as follows. 3. A shrink film splicing device for shrink wrapping, in which an object is sandwiched by shrink films supplied from first and second rolls, and the object is wrapped by heat shrinkage of the film. A first film holder having a gripping means for gripping a roll-shaped preliminary film on a set table is provided so as to be vertically movable and rotatable, and the first film holder holds a film end portion of the preliminary film. A splicing device for shrink film, comprising a control panel for controlling the first film holder. 4. The holding means provided on the first film holder is composed of an air cylinder, and the first film holder is a screw rod driven by an electric motor and a female screw provided on the first film holder. You can move up and down with and
Attached to rotate with a motor-driven worm and worm wheel provided on the floor, the film holder is
The shrink film splicing device according to claim 3, further comprising a vacuum ejector serving as a holding unit that holds the end portion of the preliminary film, and a control panel that controls the first film holder. 5. A shrink film splicing device for shrink wrapping, in which an object is sandwiched by shrink films supplied from first and second rolls, and the object is wrapped by heat shrinkage of the film. A second film holder having a holding means for holding the film end of the second roll holder, and a contact means for contacting the film on the second roll holder with the end of the preliminary film on the second film holder. And a control board for controlling the second film holder, the shrink film splicing apparatus. 6. The second film holder is provided so as to be symmetrically arranged side by side with the roll axis of the second roll holder, and a vacuum serving as a holding means for holding an end portion of the preliminary film. 6. The shrink film splicing device according to claim 5, further comprising a contact means for contacting the ejector, the end portion of the preliminary film, and the end portion of the roll in use at a fixed position, and a control board for controlling the second film holder.