JPS5916926B2 - Cylindrical multiple folding machine for cylindrical synthetic resin film - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is an automatic method that can produce a cylindrical multilayer folded film by regularly folding 30 cylindrical synthetic resin films manufactured by an inflation method in the axial direction with a constant stroke while keeping the cylindrical shape. The present invention relates to a machine, that is, a cylindrical multiple folding machine for cylindrical synthetic resin films.

35-Generally, a cylindrical synthetic resin film produced by the inflation method is crushed into a strip and wound into a paper tube or the like as a product.

When a product is to be filled and packaged in a film strip made in this manner, the film must be returned to a cylindrical shape before operation can be carried out.

For this reason, the film is required to have good opening properties and not to adhere to the inner surface, which imposes restrictions on film production and may cause trouble during filling and packaging operations. According to the present invention, the blown cylindrical film can be folded regularly and multiple times with a constant stroke while remaining cylindrical, and after folding, the film can be removed from the folding machine and managed. This eliminates the constraints and eliminates paper core management problems. In addition, during filling operations, not only can packaging be performed reliably by simply filling a tube on the filling and packaging machine with film and heat-sealing the product that has passed through the tube, but it also does not cause wrinkles, so it can be wrapped in the direction of flow. can be printed on.

Conventionally, there are bellows folding and folding methods, but both methods use a tube that is set in a filling and packaging machine, which requires storage and management of the tube, and short pitch creases. This results in poor packaging appearance.

Furthermore, since this method is rolled up in a single layer, the length of the roll-up is shorter than that of the present invention, which involves multiple folding, and is not suitable for continuous operation during filling and packaging operations. The folding machine of the present invention is capable of producing a multi-fold film cylinder free of the above-mentioned drawbacks, and has the following construction. In other words, the diameters of cylinders with different diameters gradually increase in the order of the inner cylinder, intermediate cylinder, and outer cylinder, and among these cylinders, the inner cylinder is fixed, and the inner cylinder can be overlapped toward the inner cylinder. The intermediate tube and the inner tube are movable, and the inner tube is provided with a hook device that can be opened and closed to hold the end of the cylindrical film that is pulled out through the outer circumference of the outer tube. A pushing device having a movable pushing plate is provided separately in a longitudinal groove of the inner cylinder provided opposite to the intermediate cylinder, and the hook device is used to move the intermediate cylinder while the intermediate cylinder is in the overlapping position with the inner cylinder and away from the overlapping position. When holding the cylindrical film,
When the outer cylinder leaves the overlapping position with the inner cylinder, the grip on the cylindrical film is released, and at the same time as the pushing device completes pushing the cylindrical film into the longitudinal groove, the device grips the pushing end of the cylindrical film again. Furthermore, the device is provided with a film folding edge holding device for holding the upper end of the folded film when the outer tube leaves the overlapping position with the inner tube.

The embodiments shown in the drawings will be described below.

FIG. 1 shows a cutaway view of a cylindrical film 1 folded by the folding machine of the present invention, and shows the innermost layer of the film tube 1.
By inserting the filling nozzle 3 directly connected to the supply hopper 2 of the filling and packaging machine into the tube a, the folded film tube can be filled and heat-sealed while being drawn out, as shown in FIG.

In the figure, 1b is a heat-sealed portion, and 4 is the filled contents. FIG. 3 is an explanatory view showing the process of wrapping a long object 5 using a cylindrical film folded by the folding machine of the present invention.

The cylindrical film folded by the folding machine of the present invention is conveniently used for the above-mentioned packaging, and the specific device is shown in Figs. 4 and 5. As shown, the folding machine of the present invention has an inner cylinder 6, an intermediate cylinder 7, and an outer cylinder 8.
The diameters of the cylinders gradually increase in the order of the inner cylinder, intermediate cylinder, and outer cylinder.

The inner cylinder 6 of these cylindrical bodies is suspended and fixed to a frame 10 by a hollow shaft 9.

The intermediate cylinder 7 and the external cylinder 8 are movable up and down with respect to the fixed internal cylinder 6. The intermediate cylinder 7 is supported by a piston rod 12 driven by an air cylinder 11, and the external cylinder 8 moves inside the hollow shaft 9. Air cylinder 1 supported by a penetrating shaft 13
4, it can move up and down.

The inner cylinder 6 has longitudinal grooves 15 facing each other as shown in FIG.
, 15', into which push plates 16, 16' can be freely inserted, and air cylinders 17, 17! mounted on the frame 10! piston rod 18,
18! is driven by. Moreover, the longitudinal groove 1 is formed in the inner cylinder 6.
5 and 15' are provided with hook devices facing each other.
That is, as shown in FIG. 6, arch-shaped support frames 20, 20' are installed on a base plate 19 fixed to a hollow shaft 9, and hook claws 22, 22' are swingably attached to the pivots 21, 21'. The piston rod 2 of the equipped air cylinder 23, 23'
It swings at 4,24'.

25, 25/ indicate pivot points of the air cylinders 23, 23' relative to the base plate 19.

26, 26' are links connecting the piston rods 24, 24' and the hook claws 22, 22'.

The tips of the hook claws 22, 22' are connected to the longitudinal groove 1 of the inner cylinder 6.
5 and 15' facing each other, and can freely come into contact with the upper edges thereof, thereby gripping the cylindrical film tube. Reference numerals 27 and 27' shown in FIG.
, 28', and constitute a film folding edge holding device.

Now, the cylindrical film 1 is passed from the original roll 29 through the nip rolls 30, 30' installed below the frame 10, and is placed over the outer tube 8 from below, and is then placed on the upper end of the inner tube 6 by a hooking device. Fixed.

The locking device uses piston rods 24, 24' driven by air cylinders 23, 23' to lock the hook pawl 22.
, 22' engage with the upper end of the inner tube 6, thereby fixing the film tube. Next, when the intermediate tube 7 and the outer tube 8 are moved up and down using the air cylinders 11 and 14 so as to overlap with the inner tube 6, they are folded into a cylindrical shape as shown in FIG.

The folding machine performs this operation continuously and folds the films one after another on the surface of the inner tube 6. As shown in FIG. 4, the inner cylinder 6 is provided with longitudinal grooves 15, 15', so that when the films are successively folded on the surface of the inner cylinder 6, the outer circumference of the inner film can be shortened. In order to prevent wrinkles from forming on the inner film, press the plates 16, 16' with air cylinders 17, 17' to press the wrinkled portions with each stroke.
are pushed into the grooves 15, 15' to adjust the appearance of the folded film. The upper end of the film pushed into the grooves 15, 15' in the inner tube 6 is fixed to the inner tube 6 by the aforementioned hook device.

In this way, the hook device fixes the upper end of the film to the inner cylinder 6 while the film is being folded once to prevent the film from shifting, but when the film is folded anew in the next process, the hook claws 22, 22' temporarily When the pushing plates 16, 16' are completely pushed apart, the upper end of a new film is held in its mouth. Also, as shown in Fig. 4, attach the holding device diagonally to the side surface of the frame and operate the needles 27, 2V at the tip using the mini cylinders 28, 28', so that the film is folded once and the intermediate tube 7 and the outer tube 8 are separated from each other by the inner tube. When the film is separated from the overlapping position with 6, the outer upper end of the folded film is pierced with needles 27, 27' to hold the film.

In any case, the film is passed through the outer tube 8 from below the nip rolls 30, 30' provided at the bottom of the frame 10.
The cover is placed over the cylinder from the lower side, and then raised to the upper end of the inner cylinder 6, and then fixed to the inner cylinder 6 using a hook device as shown in FIG. 5, completing the preparation. When the machine is operated, first the intermediate cylinder 7 is lowered by the air cylinder 11 and overlaps with the inner cylinder 6.

Next, the outer cylindrical portion 8 rises and overlaps the inner cylindrical portion 6, and at the same time, the film is folded in its cylindrical shape as shown in FIG. Next, when the intermediate cylinder 7 rises, the holding device 27, 2827',
28' works to maintain the film position relative to the inner cylinder 6, and when the outer cylinder 8 further descends, the pushing devices 16, 17, 18
, 16', 177 and 18' actuate to push the film into the longitudinal grooves 15 and 15' shown in FIG.

At this time, the claws 22, 22' of the hook device are temporarily separated from the inner cylinder 6, and when the pushing plates 16, 16' of the pushing device complete pushing, the claws grip the upper end of the newly folded film and move it inside. It is fixed to the upper end of the tube 6.

This completes the first step, and the machine repeats the above operations to fold the paper over and over again. The embodiment shown in FIG. 8 is different from the above-mentioned one, and consists of a receiving plate 37 and a pressing plate 38 instead of the holding device using the needles 27, 27' shown in FIG. 38 is air cylinder 39
A film folding edge holding device that can be moved toward the receiving plate 37 is used. According to this method, the film is not damaged because the needle does not make holes in the film. This device is fixed to the pedestal 10 via an arm 42.

This device helps to align the edges of the folded film. The inner cylinder 6 is pressed by a pressing plate 40. This is operated by a cylinder 41 and fixed to the frame 10 by an arm 43. Further, as shown in FIG. 9, the hook device includes fan-shaped hook claws 44, 45, 44', which are opposed to a base plate 46 fixed to the hollow shaft 9.
45' are pivots 44a, 45a, 44a', 45, respectively.
a' and can be opened and closed to the left and right, and the air cylinder 44
7, 47' and piston rods 48, 49, 48', 49
′ is activated to open left and right.

This position is opposite to the longitudinal grooves 15, 15', and the film is not clamped when the pushing plates 16, 16' are pushed in. In this case, the pushing plates 16, 16' are formed with grooves 16a as shown in FIG. 8 so that the pushing plates 16, 16' are not damaged by the claws 44, 45, 44', 45' during pushing. In the illustrated example, since the hook devices are located at the top and bottom, two grooves 16a are provided at the top and bottom.

The operation is similar to that shown in FIGS. 4 to 7, and when the outer cylinder 8 is lowered, the film folding edge holding devices 37 and 38 are first moved.
is activated, and then this is released and the holding device 40 is activated.

The raw brake cloth 32 is pulled out from the working roll 29,
It is guided from the nip rolls 30, 30' through the switch arm 34 and from the roll 35 to the outer cylinder 8.

In the figure, 31 is a motor, and 33 is a limit switch. Furthermore, the inner tube 6, intermediate tube 7, and outer tube 8 have a triple pipe structure and are supported on a pedestal 10, but a structure as shown in FIG. 10 is provided so that the outer tube 8 can be freely removed from its support. Be taken.

That is, the shaft 13 supporting the outer cylinder 8 is hollow, and a chuck cylinder 36 shown in FIG.
A shaft 50 that moves up and down is installed inside, and the external cylinder 8 is chucked by a cross-shaped chuck pawl 52 at the lower end of the shaft 50 and a catch seat 54 at the lower end of the shaft 13.

There is a cross-shaped hole 51 at the bottom of the outer cylinder 8 through which the chuck pawl 52 can go in and out, and a V-shaped groove 53 in which the chuck pawl 52 can be seated is formed on the outer surface of the external cylinder 8. To remove the outer cylinder 8 from the shaft 13, use the chuck cylinder 36 to lower the shaft 50 from the state shown in the figure, and then remove the shaft 50 from the catch seat 54.
Loosen the chuck of the chuck pawl 52, and then remove the outer cylinder 8.
The outer cylinder is rotated until the hole 51 and the chuck claw 52 are aligned with each other, and then the outer cylinder is pulled out and removed by moving downward. To attach the outer tube 8, the above operation may be performed in reverse. Although the folding machine of the embodiment is of a vertical type, the same effect can be obtained even if the folding machine is of a horizontal type.

In any case, in the present invention, the diameters of the cylinders having different diameters gradually increase in the order of the inner cylinder, the intermediate cylinder, and the outer cylinder, and among these cylinders, the inner cylinder is fixed, and the inner cylinder The intermediate tube and the outer tube are movable so that they can overlap toward the tube, and the inner tube is provided with a hook device that can be opened and closed to hold the end of the cylindrical film pulled out through the outer circumference of the outer tube. At the same time, a pushing device is separately provided which has a pushing plate that is movable toward the longitudinal groove provided opposite to the hook device of the inner cylinder, and the hook device is operated while the intermediate cylinder is in the overlapping position with the inner cylinder. The cylindrical film is gripped when the outer cylinder leaves the overlapping position, and when the outer cylinder leaves the overlapping position with the inner cylinder, the grip on the cylindrical film is released, and at the same time the pushing device completes pushing the cylindrical film into the longitudinal groove. The film folding edge holding device is configured to hold the pushed-in end of the cylindrical film again and holds the upper end of the folded film when the outer tube leaves the overlapping position with the inner tube. This is a cylindrical multiple folding machine for cylindrical synthetic resin film, and is characterized by being able to regularly multiple fold a cylindrical synthetic resin film produced by the inflation method with a constant stroke while maintaining its cylindrical shape.

[Brief explanation of the drawing]

FIG. 1 is a cutaway view of a cylindrical film folded by the folding machine of the present invention. 2 and 3 are explanatory diagrams showing the process of packaging using a cylindrical film. FIG. 4 is a perspective view of the folding machine of the present invention. FIG. 5 is a cutaway front view of the folding machine of the present invention. Figure 6 is a perspective view of the hook device.
FIG. 7 is a cross-sectional view showing the folded state. FIG. 8 is a schematic diagram of a folding machine of the present invention according to a different embodiment. FIG. 9 is a plan view of the hook device used in the folding machine of the present invention shown in FIG. 8. FIG. 10 is a sectional view showing a mechanism for removing the outer cylinder. 6
...Inner cylinder, 7...Intermediate cylinder, 8...
...External cylinder, 16, 16', 17, 17', 18, 1
8'...Pushing device, 22, 22', 44, 45
, 44', 45'--Hook claw, 27, 27'
, 28, 28t... Holding device, 37, 38, 40
, 41... Holding device.

Claims (1)

[Claims] 1. The diameters of the cylinders, which have different diameters, gradually increase in the order of the inner cylinder, the intermediate cylinder, and the outer cylinder. Among these cylinders, the inner cylinder is fixed, and The intermediate tube and the outer tube are movable so that they can be overlapped toward each other, and the inner tube is provided with a hook device that can be opened and closed to hold the end of the cylindrical film pulled out through the outer periphery of the outer tube. A pushing device having a pushing plate movable toward the longitudinal groove of the inner cylinder provided opposite to the hook device of the inner cylinder is separately provided, and the hook device is pressed while the intermediate cylinder is in the overlapping position with the inner cylinder. The cylindrical film is gripped when the outer cylinder leaves the overlapping position, and the grip on the cylindrical film is released when the outer cylinder leaves the overlapping position with the inner cylinder, and at the same time as the pushing device completes pushing the cylindrical film into the longitudinal groove. A tube comprising a device for gripping the folded end of the cylindrical film again, and a film folding edge holding device for holding the upper end of the folded film when the outer tube leaves the overlapping position with the inner tube. A cylindrical multiple folding machine for synthetic resin film parts. 2. The cylindrical synthetic resin film cylindrical multiple folding machine according to claim 1, wherein the cylindrical bodies are disposed either vertically or horizontally. 3. The cylindrical multiple folding of a cylindrical synthetic resin film according to claim 2, wherein the hook device consists of a swinging hook pawl that can freely come into contact with the end of the inner cylinder, and is driven by a cylinder device. Machine. 4. The cylindrical multiple folding machine for a cylindrical synthetic resin film according to claim 2, wherein the hook device is composed of a pair of fan-shaped claws that can be opened and closed left and right, and these are driven by a cylinder device. 5. The film folding edge holding device is a needle-shaped film slippage prevention device that temporarily supports the upper end of the cylindrical film relative to the inner tube when the outer tube is detached from the inner tube. A cylindrical multiple folding machine for a cylindrical synthetic resin film according to item 2, 3, or 4. 6. The film edge holding device consists of a receiving plate and a pressing plate, and when the outer cylinder leaves the overlapping position with the internal cylinder, the pressing plate can be moved toward the receiving plate with a cylinder so as to pinch the folded cylindrical film end. A cylindrical multiple folding machine for a cylindrical synthetic resin film according to claim 1 or 2 or 3 or 4.