JPH11228020A - Multifolding machine for tubular film and tubular film carrying device used for the machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a multifolding machine for a tubular film which can accurately fold the tubular film and a tubular film carrying device used for the machine. SOLUTION: A tubular film multifolding machine 1 is composed of an inner cylinder fixed to a shaft fixed to a frame, an intermediate cylinder 6 having mutually opposite slots vertically movably attached to an upper side of the inner cylinder 5, an external cylinder 7 having mutually opposite slots vertically movably supported below the inner cylinder 5, a sandwiching device 15 severally provided near the upside of mutually opposite slots provided in the inner cylinder 5, a holding device provided inside the inner cylinder 5, a folding device 2 with a pushing-in plate 14 to be able to insert in mutually opposite slots provided in the inner cylinder 5, a movable shaft vertically movable inside an arm, a limit switch turned on or off by the lifting of the above movable shaft, a motor actuated by the turning on or off of the limit switch, and a carrying device 3 equipped with a driving roll rotated by driving the motor.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-folding device for a tubular film and a transporting device for the tubular film used therefor, and more particularly, to folding a tubular film at a constant stroke in the axial direction while keeping the tubular shape. For a multiple folding machine for a tubular film and a tubular film transport device used for the same.

[0002]

2. Description of the Related Art In general, a cylindrical synthetic resin film is crushed and formed into a belt-like film, which is wound around a paper tube or the like to produce a product. When packaging a product or the like using a tubular film rolled up into a paper tube or the like as a squashed band as described above, the work must be performed after returning the product to a tubular state again. No. For this purpose, the film is required to have good opening properties and not to be closely adhered to the inner surface of the film, and there are restrictions on the production of the film.

Therefore, in order to solve such a problem, a tubular film is folded in a regular and multiple manner at a constant stroke while the tubular film is kept in a tubular shape. A folding machine has been proposed (Japanese Patent Publication No. 59-16926).

FIG. 14 and FIG. 15 are views showing a multi-folding machine 31 for this tubular film.
2, an intermediate cylinder 33, an outer cylinder 34, and a push plate 36 which can be inserted into opposed long grooves 35 provided in the inner cylinder 32, and the intermediate cylinder 33 can be lowered and the outer cylinder 34 can be raised. Has become. Then, with the upper end portion of the tubular film 37 fixed to the inner tube 32, the intermediate tube 33 is moved down, and then the outer tube 34 is moved up.
As shown in FIG. 13, a cylindrical film (1 in FIG. 13)
7) can be folded multiple times.

[0005] The multiple folding machine 3 for this cylindrical film.
In the case of wrapping a product with multiple folds using the wrapper 1, the folded film is mounted on the cylinder of the packaging machine, and the product that has passed through the cylinder is simply heat-sealed. Since packaging can be performed, restrictions on film production and the like can be eliminated.

[0006]

However, in the cylindrical film multiple folding machine 31 proposed in the prior art, in order to hold the folded upper end of the film, a needle-shaped film folding ear holding device 38 is provided. Due to the use, as the number of times the tubular film is folded increases, the upper end of the film cannot be held sufficiently, and as a result, the folded film gradually shifts downward, and the tubular film 37 is correctly folded. There is a danger that can not be done.

[0007] Further, it is necessary to provide air holes when a product or the like is filled and packaged in a cylindrical film. However, since a cylindrical film having air holes in advance is expensive, such air holes are required. Purchasing a tubular film that is open will increase costs. In general, a cylindrical film having air holes in advance is about 1 yen higher at one meter compared to a cylindrical film having no air holes, and a cylindrical film usually costs 1000 to 1500 meters. If you buy one unit of tubular film to purchase as a unit, 10
The cost increases from 00 yen to 1500 yen. Therefore, in general, a tubular film without air holes is purchased, and before being folded multiple times, air holes are manually formed in the cylindrical film using a punch or the like. However, there is also a problem that labor costs increase.

Accordingly, the present invention is directed to a cylindrical film multi-folding machine capable of accurately folding a cylindrical film with a simple structure and automatically opening air holes, and a cylindrical film used therefor. It is an object to provide a transport device.

[0009]

SUMMARY OF THE INVENTION A tubular film multiple folding machine according to the present invention is a tubular film multiple folding machine for automatically folding a tubular film into multiple layers, wherein the opposed long grooves are opposed to each other. And an internal cylinder suspended and fixed to a shaft fixed to a gantry, and provided to be vertically movable above the internal cylinder, and capable of overlapping the internal cylinder by descending, facing each other. An intermediate tube having a long groove, and an outer tube having opposing long grooves, which is provided below the inner tube so as to be movable up and down and can overlap the inner tube and the intermediate tube by ascending.
A holding device for holding an upper end portion of a folded tubular film, which is provided near the upper part of the opposing long groove provided in the inner tube, and a primary device provided with the folded tubular film provided in the inner tube. A holding device for holding, comprising a pushing plate that can be inserted into opposed long grooves provided in the inner tube, the inner tube, the intermediate tube, and the outer tube are sequentially increased in diameter, the inner tube, A folding device that can overlap in the order of the intermediate cylinder and the outer cylinder, a movable shaft that can move up and down in the arm, a limit switch that is turned on or off by raising the movable shaft, and the limit switch And a transport device including a motor driven by turning on or off and a driving roll rotated by driving the motor.

In the multiple folding machine for cylindrical film of the present invention,
When the intermediate cylinder is lowered while the upper end of the cylindrical film is held by the inner cylinder, and then the outer cylinder is raised, the cylindrical film can be automatically folded in multiple layers.
Therefore, restrictions required in the production of the tubular film, such as good openability and non-adherence of the inner surface, can be eliminated.

Further, since a holding device for holding the upper end portion of the tubular film is provided near the upper part of the opposed long grooves provided in the inner tube, a needle-shaped film folding ear holding device is used. Unlike the case, even when the number of times of folding of the tubular film is increased, the upper end portion of the tubular film can be reliably held, and the tubular film can be correctly folded multiple times.

Further, in the cylindrical film multiple folding machine according to the present invention, the movable shaft which can move up and down in the arm, the limit switch which is turned on or off by raising the movable shaft, and the limit switch Since a transport device including a motor that is driven by turning on or off and a drive roll that is rotated by driving the motor is provided, it is possible to automatically transport the tubular film. .

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a cylindrical film multi-folding apparatus according to the present invention and a cylindrical film transport apparatus used in the apparatus; FIG. It is a figure which shows the multiple folding machine of a film (henceforth only "folding machine"), and 1 is a folding machine in a figure. In the drawing, reference numeral 2 denotes a folding device constituting the folding machine of this embodiment, and reference numeral 3 denotes a film transport device for transporting a cylindrical film to the folding device 2. In the drawing, reference numeral 4 denotes a control unit for controlling the entire operation, and the control unit 4 is provided with a switch for operating the folding machine of this embodiment. FIG. 2 is a side view of the folding device 2 shown in FIG.

First, the folding device 2 according to the present embodiment will be described. The folding device 2 includes an inner tube 5, an intermediate tube 6, and an outer tube 7, whose diameters are equal to those of the inner tube 5, the middle tube, and the middle tube. The size of the cylinder 6 and the size of the external cylinder 7 are gradually increased in this order. The inner cylinder 5 is suspended and fixed to a hollow shaft 9 fixed to a gantry 8.

The intermediate cylinder 6 has an air cylinder 10
Supported by the piston rod 11 driven by
The hollow shaft 9 is mounted above the inner cylinder 5 so as to be vertically movable.

Further, the outer cylinder 7 is supported by a shaft 13 which can be moved up and down by an air cylinder 12 together with a portion passing through the hollow shaft 9 below the inner cylinder 5 so that the air cylinder 12 is operated. Shaft 13
, The outer cylinder 7 can also be moved up and down. Thereby, by operating the air cylinders 10 and 12, the inner cylinder 5, the intermediate cylinder 6, and the outer cylinder 7 are overlapped in this order.

Here, the inner cylinder 5 is provided with long grooves 501 facing each other in the vertical direction.
A push plate 14 that can be moved in the front-rear direction by a driving device 1401 supported by the gantry 8 can be inserted therein.

In the figure, reference numeral 15 denotes a holding device for holding the upper end portion of the folded tubular film.
As shown in FIG. 2, the upper end portion of the cylindrical film is provided near the upper part of the opposed long groove 501 provided in the inner cylinder 5 and moved in the front-rear direction by driving the air cylinder 1501. It can be pinched.

FIG. 3 is a side view of the holding device 15. As shown in FIG. 3, the holding device 15 includes a fixing piece 1503 and an air cylinder 1501.
And a holding piece 1502 movable in the front-rear direction by
It is supported by a gantry 8.

FIG. 4 is a view showing a fixing position of the holding device. As shown in the drawing, the holding device 15 is slightly smaller than the center line of the long groove 501 of the inner cylinder 5. It is provided in a shifted position. Therefore, it is possible to prevent the holding device 15 from becoming an obstacle when the pushing plate 14 is inserted into the long groove 501.

Like the internal cylinder 5, the intermediate cylinder 6 and the external cylinder 7 have longitudinal grooves 6 facing each other in the longitudinal direction.
01 and 701 are provided, and therefore, even when the air cylinders 10 and 12 are driven to move the intermediate cylinder 6 and the outer cylinder 7, the holding device 15 does not become an obstacle,
The inner cylinder 5, the intermediate cylinder 6, and the outer cylinder 7 can be stacked.

FIGS. 5 to 8 are views showing the holding device 26 provided in the inner cylinder 5. FIG. 5 is a plan view, FIG. 6 is a front view, and FIG. 8 shows a state viewed from the right side, and FIG. 8 shows a state viewed from the left side.

The holding device 26 has eight holding pieces 2601 to 2608 mounted on the supporting plates 2617 and 2618 mounted on the hollow shaft 9 so as to be movable in the horizontal direction. With axis 2613, 2602 and 2606 are combined with axis 2614 to form 2602 and 2606.
3 and 2607 by axis 2615 and 2604 and 2
608 are connected by a shaft 2616. The shaft 2613 is moved by the air cylinder 2609, the shaft 2615 is moved by the air cylinder 2610, the shaft 2616 is moved by the air cylinder 2611, and the shaft 2614 is moved by the air cylinder 2612, so that the holding pieces 2601 and 2605 move in the A direction, 2602.
And 2606 are movable in the B direction, 2603 and 2607 are movable in the C direction, and 2604 and 2608 are movable in the D direction, and the pushing film 14 can hold the cylindrical film 17 pushed into the long groove 501 of the inner cylinder 5. become.

As shown in FIG. 6, a notch 141 is provided at the leading end of the pushing plate 14, and the holding pieces 2601 to 2608 are provided at positions corresponding to the notch 141. The air cylinder 260
9, 2610, 2611, 2612 are supported on the hollow shaft 9 by support shafts 2619, 2620, 2621, 2621, respectively.

Then, the pushing plate 14 is inserted into the long groove 50 of the inner cylinder 5.
Air cylinders 2609, 2
By the operation of 610, 2611, 2612, the holding piece 26
01 and 2605 are in the A direction, 2602 and 2606 are in the B direction, 2603 and 2607 are in the C direction, and 2604.
And 2608 move in the D direction, and after the pushing plate 14 is pushed into the long groove 501 of the inner cylinder 5, the holding pieces 2601 to 2608 return to the original positions, and the notches 14 of the pushing plate 14 are cut.
One part of the tubular film is sandwiched and temporarily held.

As described above, in the folding machine of this embodiment, since the holding device 26 for temporarily holding the tubular film in the inner tube 5 is provided, the folded tubular film in combination with the holding device 15 is provided. 17 can be prevented from slipping down to the lower side of the inner cylinder 5, and the tubular film can be folded accurately.

In the folding machine 1 constructed as described above,
As shown in FIG. 9, when the operation is started with the upper end portion of the tubular film 17 held in the inner tube 5, first, the intermediate tube 6 is started.
Is lowered by the operation of the air cylinder 10 and overlaps with the inner cylinder 5.

Next, as the outer tube 7 rises and overlaps the inner tube 5, the tubular film 17 is folded as shown in FIG.

Next, the holding device 15 holds the upper end portion of the tubular film 17, the outer tube 7 moves down, and then the intermediate tube 6 moves up. Thereafter, the holding by the holding device 15 is released, and the holding piece 260 of the holding device 26 is released.
1 to 2608 are movable to hold the tubular film, and at the same time, the pushing plate 14 is operated to push the tubular film 17 into the long groove 501 provided in the inner cylinder 5. After that, the holding pieces 2601 to 2608 of the holding device 26 return to their original positions, whereby the tubular film 17 pushed into the long groove 501 is held.

Thereafter, the intermediate cylinder 6 is lowered while the pushing plate 14 is pushing the cylindrical film 17 into the long groove 501 provided in the inner cylinder 5. Then, at the same time when the pushing by the pushing plate 14 is released, the outer tube 7 rises and the tubular film 17 is folded.

As described above, in the folding machine 1 of the present embodiment, since the holding device 15 is provided near the upper part of the opposed long grooves 501 provided in the inner tube 5, the number of times of folding the tubular film is large. Even in such a case, the tubular film does not slip and falls, and since the holding device 26 is provided in the inner tube 5, it is possible to fold the tubular film accurately multiple times. In addition, since the holding device 15 is provided at a position slightly shifted from the opposed long grooves 501 provided in the inner tube 5, the holding device 15 does not hinder the operation of the pushing plate 14 and is sufficiently folded. The film 17 can be pushed into the long groove 501.

Next, a description will be given of the cylindrical film transport device 3 used in the present embodiment. FIG. 10 is a diagram showing the film transport device 3 of the present embodiment as viewed from the front. FIG. 11 is a diagram showing a state where the film transport device 3 shown in FIG. 10 is viewed from the left side.

As shown in the figure, the film transport device 3 of the present embodiment comprises an arm 25 and a cylindrical film 17.
And a movable shaft 21 that can move up and down in the arm 25 each time the tubular film is used, and a limit switch 18 provided near the lower end of the arm 25.
And a motor 1 driven by the limit switch
9 and the cylindrical film 1 rotated by the motor 19
The limit switch 18 is turned on and off by a movable shaft 21 that moves up and down in an arm 25. In the figure, 2
2 is a roll around which the cylindrical film 17 is wound,
Reference numerals 23 and 24 denote auxiliary rolls for smoothly transporting the cylindrical film 17, and reference numeral 1901 denotes a belt for transmitting rotation of the motor 19 to the drive roll 20.

In the tubular film transport device 3 thus constructed, when the tubular film 17 is used in the folding device 2 and the tubular film 17 is pulled, the tubular film 17 is supported by the tubular film 17. The movable shaft 21 moves up in the arm 25, whereby the limit switch 18 is turned on or off, and the motor 19 is driven.

Then, the drive roll 20 rotates via the belt 1901 and the cylindrical film 17 wound around the roll 22 is conveyed.

Then, when the cylindrical film 17 is conveyed, the movable shaft 21 descends and moves down to the lower end of the arm 25, and at the same time, the limit switch 18 turns off or on, and the motor 19 Stops, and the conveyance of the cylindrical film 17 stops. When the tubular film 17 is used in the folding device 2 and the tubular film 17 is pulled, the movable shaft 21 is raised in the same manner as described above, and the limit switch 18, the motor 19, and the drive roll 20 are moved. The operation transfers the cylindrical film.

As described above, in the cylindrical film transporting apparatus of the present embodiment, the cylindrical film is automatically transported every time the cylindrical film 17 is used in the folding device 2. Unlike the conventional method in which the cylindrical film is manually conveyed, the cost can be reduced.

FIG. 12 is a view showing the drive roll 20. In the drive roll 20 used in this embodiment, the perforated portion 2 for making air holes in the cylindrical film 17 is shown.
001 is provided. Therefore, when the drive roll 20 rotates and conveys the cylindrical film 17, air holes can be automatically formed in the cylindrical film, and even when a cylindrical film without air holes is used, air can be removed. The hole can be omitted from the process, and the cost can be reduced. In the figure, (B) shows the perforated part 2001
FIG. 4 is a view showing the upper part of the end view taken along the line EE of FIG. 3, and as shown in the figure, the distal end of the perforated portion 2001 has a blade shape, thereby forming an air hole in the cylindrical film 17. It has become possible to open.

[0039]

The tubular film multi-folding apparatus and the tubular film transport apparatus used in the present invention are embodied in the form described above, and have the following effects.

The tubular film multi-folding machine according to the present invention is provided with an opposing long groove, an inner cylinder suspended and fixed to a hollow shaft fixed to a frame, and an upper portion of the shaft above the inner cylinder. An intermediate cylinder provided with long grooves facing each other, which is vertically movably mounted on the shaft; an outer cylinder provided with long grooves facing each other, which is vertically movably mounted on the shaft below the inner cylinder; A holding device provided in the vicinity of the opposed long groove provided in the above, a holding device provided in the internal cylinder, and a push plate insertable into the opposed long groove provided in the internal cylinder. The inner cylinder, the intermediate cylinder, and the outer cylinder increase in diameter in order, and can be overlapped in the order of the inner cylinder, the intermediate cylinder, and the outer cylinder, and a movable shaft that can move up and down in the arm. Is turned on or off when the movable shaft rises. A limit switch that is turned off, a motor that is driven when the limit switch is turned on or off, and a transport device that includes a drive roll that is rotated when the motor is driven, is configured by a transport device having a top end of the tubular film. When the intermediate cylinder is lowered and the outer cylinder is raised while being held in the inner cylinder, the tubular film can be automatically folded in multiple layers.

Further, in the cylindrical film multiple folding machine of the present invention, since the holding device is provided near the upper part of the opposed long groove provided in the inner tube, a needle-shaped film folding ear holding device is used. Unlike conventional multi-folding machines that hold the upper end of a folded tubular film, even when the number of times of folding is increased, the folded tubular film does not shift downward and accurately It became possible to fold the film.

Further, since the holding device is provided at a portion slightly deviated from the center line of the opposed long groove provided in the inner cylinder, when the pushing plate is inserted into the long groove of the inner cylinder, the holding device is used. The device does not become an obstacle.

Further, in the cylindrical film multiple folding machine according to the present invention, the movable shaft which can move up and down in the arm, the limit switch which is turned on or off when the movable shaft is raised, and the limit switch Since a transport device including a motor driven by turning on or off and a drive roll rotated by driving the motor is provided, the tubular film is automatically transported without relying on humans. It has made it possible to save labor costs.

Further, the drive roll of the transfer device is provided with a perforated portion for forming an air hole in the cylindrical film to be transferred, so that a cylindrical film without air holes is used. Even if there is, it is possible to automatically open the air holes at the time of conveyance, and it is possible to omit the operation step of opening the air holes, and it is possible to reduce the cost.

[Brief description of the drawings]

FIG. 1 is a view showing an embodiment of a cylindrical film multiple folding machine according to the present invention.

FIG. 2 is a side view of the folding device in FIG. 1;

FIG. 3 is a diagram for explaining a holding device used in the embodiment of the cylindrical film multiple folding machine according to the present invention.

FIG. 4 is a diagram for explaining a mounting position of a holding device used in the embodiment of the cylindrical film multiple folding machine according to the present invention.

FIG. 5 is a diagram showing a plan view of a holding device used in the embodiment of the cylindrical film multiple folding machine of the present invention.

FIG. 6 is a view showing a front view of a holding device used in the embodiment of the tubular film multiple folding machine according to the present invention.

FIG. 7 is a diagram showing a state in which a holding device used in the embodiment of the tubular film multiple folding machine according to the present invention is viewed from the right side.

FIG. 8 is a diagram showing a left side view of a holding device used in the embodiment of the tubular film multiple folding machine of the present invention.

FIG. 9 is a view for explaining a method of using the embodiment of the cylindrical film multiple folding machine according to the present invention.

FIG. 10 is a view showing a tubular film transport device used in the embodiment of the tubular film multiple folding machine of the present invention.

FIG. 11 is a view showing a side surface of the cylindrical film transport device shown in FIG. 7;

FIG. 12 is a view for explaining a drive roll used in a tubular film transport device used in an embodiment of the tubular film multiple folding machine of the present invention.

FIG. 13 is a view for explaining how to use the embodiment of the cylindrical film multiple folding machine of the present invention.

FIG. 14 is a diagram showing a conventional cylindrical film multiple folding machine.

FIG. 15 is a view showing a conventional cylindrical film multiple folding machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Multiple folding machine of cylindrical film 2 Folding device 3 Conveyor of cylindrical film 4 Control part 5 Inner cylinder 6 Intermediate cylinder 7 External cylinder 8 Stand 9 Hollow shaft 10, 12 Air cylinder 11 Piston rod 13 Shaft 14 Push plate DESCRIPTION OF SYMBOLS 15 Nipping device 17 Cylindrical film 18 Limit switch 19 Motor 20 Driving roll 21 Movable shaft 22 Roll 23, 24 Auxiliary roll 25 Arm 26 Holding device

Claims (6)

[Claims] 1. A multi-layer folding machine for automatically folding a tubular film into multiple layers, comprising a plurality of opposed long grooves (501) and a shaft fixed to a gantry (8). 9) an inner cylinder (5) suspended and fixed to the inner cylinder (5), and an opposing, vertically movable upper part of the inner cylinder (5), which can overlap the inner cylinder (5) by descending. And an intermediate tube (6) having a long groove (601) which is provided to be able to move up and down below the inner tube (5) and ascending to overlap the inner tube (5) and the intermediate tube (6). And an outer cylinder (7) having opposed long grooves (701), and a folded cylindrical film provided near and above the opposed long grooves (501) provided in the inner cylinder (5). A clamping device (1) for clamping the upper end ), A holding device (26) provided in the inner tube (5) for temporarily holding the folded tubular film (17), and a facing long groove provided in the inner tube (5) ( 501) (1)
4), wherein the inner cylinder (5), the intermediate cylinder (6), and the outer cylinder (7) are sequentially increased in diameter, and the inner cylinder (5), the intermediate cylinder (6), and the outer cylinder (7) are sequentially increased. A folding device (2) capable of overlapping in the order of, a movable shaft (21) movable up and down in an arm (25), and turned on or off by rising of the movable shaft (21). A transport comprising a limit switch (18), a motor (19) driven by turning on or off the limit switch (18), and a drive roll (20) rotated by driving the motor (19). An apparatus (3), comprising: a multi-folding machine for cylindrical films. 2. The multiple folding machine according to claim 1, wherein the drive roll (20) is provided with a perforated portion for making air holes in the cylindrical film. 3. A multi-layer folding machine for automatically folding a tubular film into multiple layers, comprising a plurality of opposed long grooves (501) and a shaft fixed to a gantry (8). 9) an inner cylinder (5) suspended and fixed to the inner cylinder (5), and an opposing, vertically movable upper part of the inner cylinder (5), which can overlap the inner cylinder (5) by descending. And an intermediate tube (6) having a long groove (601) which is provided to be able to move up and down below the inner tube (5) and ascending to overlap the inner tube (5) and the intermediate tube (6). And an outer cylinder (7) having opposed long grooves (701), and a folded cylindrical film provided near and above the opposed long grooves (501) provided in the inner cylinder (5). A clamping device for clamping the upper end 15), said inner tube (5)
A holding device (26) for temporarily holding the folded tubular film (17) provided therein, and a pushing plate (51) which can be inserted into opposed long grooves (501) provided in the inner tube (5). 14), the inner cylinder (5), the intermediate cylinder (6),
The outer cylinder (7) is a multi-folding machine for a tubular film, in which the diameter of the outer cylinder (7) increases in order, and the inner cylinder (5), the intermediate cylinder (6), and the outer cylinder (7) can overlap in this order. 4. A holding device according to claim 1, wherein said holding device is provided at a position deviated from a center line of opposed long grooves provided in said inner tube. Item 4. A multi-folder for a tubular film according to any one of Items 3. 5. A movable shaft (21) that can move up and down in an arm (25), a limit switch (18) that is turned on or off when the movable shaft (21) rises, and a limit switch (18). ) Is turned on or off, a tubular film transport device comprising a motor (19) driven by the motor (19) and a drive roll (20) rotated by the drive of the motor (19). 6. The cylindrical film transport device according to claim 5, wherein the drive roll (20) is provided with a perforated portion for making air holes in the cylindrical film.