JP2914939B2 - Agricultural film folding machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an agricultural film folding machine mainly used as a greenhouse covering film.

[0002]

2. Description of the Related Art Agricultural greenhouses differ in size (width, height, length) from building to ridge. When purchasing agricultural films for greenhouses (covered films), the greenhouse Depending on the area to be covered, the order can be several meters wide and several meters long.

[0003] On the other hand, agricultural film distributors sell agricultural films by cutting them into widths and lengths according to customer's orders, but agricultural films used in greenhouses are quite wide. Is required, and in general, FIG.
As shown in, wide W ₀ of the tubular (or gusset) is processed strip film B from the wrapping original fabric roll A. In addition, this kind of agricultural film is manufactured in a tubular shape by an inflation method, and the circumferential length of the tube is manufactured in a standard size such as 8 m (W ₀ = 4 m) and 10 m (W ₀ = 5 m). I have. In the case of agricultural films having a wider width, they are formed with gussets. For example, when an order for an agricultural film having a width of 7 m is made, one of the double films is width W _{1 in the} width direction while unwinding the tubular band-shaped film B from the raw material roll A of W ₀ = 4 m. (1m width) is cut out (inside out), and the product film C (deployment width 7m) in which the inside out is cut out is sequentially zigzag by a predetermined folding width (for example, a folding piece E of 90cm width) by the order length. It is folded and processed into a long (4 m) folding laminated film F as shown in FIG. After that, the folding laminated film F is bent from both ends, and FIG.
The package is packed and shipped in a compact state as shown by the symbol H in (C).

[0004] In order to bring back the folded laminated film H of FIG. 8C and cover the frame of the greenhouse, FIG.
As shown in FIG. 5, a long folded laminated film F is placed on the roof center of the frame 11 of the greenhouse, and the uppermost folded piece of the folded laminated film F is held.
After pulling in the length direction and expanding as shown by reference numeral C, the folded portions on both sides are opened outward as shown by reference numerals P and P, so that the entire area of the frame 11 is covered with the agricultural film. Can be coated.

By the way, a predetermined width W ₀ (for example, when the circumference is 8)
FIG. 8 shows a state in which the surplus width W ₁ (for example, 1 m width) is cut off from the material roll A on which the belt-shaped film B of FIG.
FIG. 10 shows a conventional folding machine for processing a long folding laminated film F as shown in FIG.

[0006] In the conventional folding machine shown in Fig. 10, a tubular strip film B is fed out from a web roll A by a feeder 1, and a blade of a slitter apparatus 2 is cut into one strip of the strip film (double film) B. At 21 (there are two sheets at intervals of the cutting width W ₁ ), the surplus width W ₁ shown in FIG. 8A is cut off, and the sorting film 3 sorts the cut film D and the product film C. Then, the product film C is sequentially folded in a zigzag manner by folding pieces E having a predetermined folding width by the swing-off device 5 to be laminated on the folded laminated film F.

[0007] The swing-off device 5 reciprocates the planar oscillator 51 with the oscillator 6 so that the oscillator 51 is reciprocated.
The product film C guided to the front surface 51a of the product can be sequentially folded in a zigzag manner. The oscillating body 51 is shown in FIG.
As shown in FIG. 1, a belt belt 54 is wound around the upper roll 52 and the lower roll 53, and the lower roll 53 side can swing back and forth around the upper roll 52. The oscillating device 6 is configured to oscillate the oscillating body 51 in a crank manner by a motor 61 via an arm 62 and a connecting rod 63. The rocking body 51 is rocked in a range between a substantially vertical position indicated by reference numeral 51 'and a position where the rocking body 51 is tilted forward by an angle b (for example, angle b = about 30 °) as shown by a solid line.

On the other hand, the cut film D distributed by the distribution unit 3 is taken to another place via the guide rollers 13 to 15. At this time, if the cut-off film D becomes loose on the way, there is a possibility that the cut-off film D may bite into the machine. Therefore, the operator collects the cut-off film D while pulling the cut-off film D by hand. When the product film C is folded in a zigzag shape by an order length, the product film C is cut off by the cross cutter 10, and a long (4 m) folding laminated film F shown in FIG. 8B is formed. You.

[0009]

However, in the conventional folding machine shown in FIG. 10, for example, the circumference is 8 m (W ₀ = 4).
When processing a standard product of m) into a product film C of 7 m width, the surplus film of 1 m width is cut off by the slitter device 2, but the cut film D is currently discarded as it is. That is, in the conventional folding machine, even if the cut film D has a considerably large width (for example, 1 m width) and can be used for other purposes, the cut film D can be used for other purposes.
Cannot be recovered in a state that can be reused, and
There is a problem that resources are wasted. Further, as shown in FIG. 10, the cut film D needs to be collected while being sequentially pulled by an operator, and there is a problem that the collecting work requires labor, and the cut film D is discarded as garbage. There was also a problem that it took time to dispose.

[0010] In view of the above-mentioned problems of the conventional folding machine, the present invention can utilize a surplus width of the cut-off film for another purpose when processing a band-like film wider than a product width into a folded laminated film. It is an object of the present invention to provide an agricultural film folding machine that incorporates a mechanism that can be collected in a state.

[0011]

The present invention has the following structure as means for solving the above-mentioned problems. That is, according to the present invention, the strip film fed from the material roll is cut in the film length direction by an excess width of the strip film by the slitter device, and then the strip film having the product width is shaken down and folded in a zigzag shape sequentially by the device. It is intended for use in folding agricultural film folding machines.

The folding machine according to the present invention is provided with a winding device for winding the surplus width cut film cut by the slitter in such a manner that the film side end is aligned around the core. It is characterized by.

[0013] Agricultural films are commercially available in the form of tubes, gussets on both sides, or a single film, but when a wide film such as a greenhouse is required. A belt-like film having a long perimeter for its apparent width, such as a tube or a gusset, is employed. Incidentally, this kind of agricultural film is manufactured with a standard width of 8 m, 10 m or the like.

On the other hand, the coating width of a greenhouse or the like varies in size, and it is necessary to cut the required width according to an order. If there is no standard product of the required width in the agricultural film, the surplus film is cut off from the wider band and sold.

By the way, in the folding machine according to the present invention, the strip film fed from the raw roll can be cut by an excess width by a slitter. In the folding machine according to the present invention, the cut film is wound. The take-up device allows the take-up in a state of being aligned around the core. This cut film often has a width of, for example, 1 m or more.
If this cut film is wound up in an aligned state, it can be used (sold as a commercial product) when a small-width film such as for raising seedlings is required.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An agricultural film folding machine according to an embodiment of the present invention will be described with reference to FIGS.
FIG. 6 shows a folding machine according to the first embodiment, and FIGS. 6 and 7 show modifications (second and third embodiments) of the cradle device portion of the folding machine according to the first embodiment. It is shown.
In the following description, the left-right direction is the depth direction in FIG. 1, and the front-rear direction is the left-right direction in FIG.

The folding machine of the first embodiment, as shown in FIG. 3, after resection the film D of surplus width W ₁ from the source roll A wound a tubular strip film B, the remainder of the product As shown in FIG. 8B, the film C is configured to be processed into a long folded laminated film F. The raw material roll A has a standard dimension width W ₀ (for example, W ₀ = 4 m, 5
m, 6 m, etc.).

As shown in FIGS. 1 and 2, this folding machine includes a feeding device 1 for feeding a tubular strip film B from a raw material roll A, and an excess width W _{1 of the} strip film B.
Device 2, a sorting unit 3 for separating the product film C and the cut film D cut by the slitter device 2, and a winding device 4 for winding the cut film D
And a swing-off device 5 for folding the product film C in a zigzag manner by a predetermined folding width, and a cradle device 8 for receiving folding pieces E sequentially zigzag-down from the swing-off device 5.

The feeding device 1 is set so as to feed the belt-shaped film B at the same speed as the feeding speed of the belts 54 and the like of the subsequent feed rolls and the swing-off device 5.

In this embodiment, the slitter 2 is
As shown in FIG. 2, two blades (leather knives) 21 and 21 installed so as to be adjustable in the width direction of the band-shaped film B.
have. The slitter device 2 has receiving plates 22, 22 at positions corresponding to the blades 21, 21, respectively. Each of the receiving plates 22, 22 is set in a tubular strip-shaped film B so that only one film can be cut by the blades 21, 21. Note that the number of the blade 21 and the receiving plate 22 can be increased or decreased as necessary (in accordance with the number of slits).

The sorting unit 3 sends the cut film D cut by the slitter device 2 to the winding device 4 and sends the product film C to the swinging device 5.

The winding device 4 has two winding rolls 41, 4
2 and a rider roll 43, and the three rolls 4
The cutting film D can be wound around the winding core 40 between 1, 42 and 43. Rider roll 43
Is displaced by a vertical movement device (telescopic cylinder) 44 in accordance with the winding diameter of the cut film D. The winding core 40 arranged in the winding section is positioned at a fixed position in the length direction of the winding core by holding both ends of the winding core with chucks (not shown).

The product film C sorted by the sorting unit 3
Is sent to the swing-off device 5 side through another winding device 4A similar to the winding device 4 for the cut film D. The winding device 4A can be used when three cutting tools 21 are installed in the slitting device 2 and cut into one product film C and two cutting films D (for example, two having a width of 1 m), or It can also be used when the strip film B is simply divided into two and wound into a roll without using the swing-off device 5. In other embodiments, the winding device 4A can be omitted.

As shown in FIGS. 4 and 5 in an enlarged manner, the swing-off device 5 includes an oscillating body 51 having a considerable area,
And a swinging device 6 for swinging the swinging body 51 back and forth.

The oscillating body 51 includes a pair of left and right side plates 55, 55.
An upper roll 52 and a lower roll 53 are attached above and below, and a plurality of strip belts 54 are wound between the upper and lower rolls 52, 53. This rocking body 51
The upper roll 52 serves as a drive shaft, and the upper roll 52
, The lower roll 53 side can swing back and forth. As shown in FIG. 5, small gaps are provided in the left-right direction between the belt belts 54 wound around the upper and lower rolls 52, 53. In this gap, a narrow belt 75 of the vacuum device 7 described later is interposed.

At the front end (lower end) of the rocking body 51 to which the product film C is transferred, a holding roll 56 is provided.
Is installed. The presser roll 56 includes the swinging body 51.
In order to prevent the product film C from being separated from the front end of the product film C, the entire width of the product film C is sandwiched between the pressing roll 56 and the belt belt 54 at the front end of the rocking body 51. The pressing roll 56 is rotated at the same peripheral speed as the traveling speed of the belt 54.

The oscillating body 51 is provided with a vacuum device 7 for transferring the product film C in a state of being adsorbed to the oscillating body front surface 51a. This vacuum device 7
As shown in FIG. 4 and FIG.
Narrow belts 75, 75 each having a number of small holes 76 between them
The vacuum boxes 72, 72,... Are arranged at positions corresponding to the narrow belts 75 in the belt belt 54, respectively.
The air in 2, 72...
It is configured to suck. Each of the vacuum boxes 72, 72,.
The suction holes 73 having a long hole shape are formed so as to correspond to the thin belts 75.
Of the product film C through the small hole 76 of the oscillator 51a.
(Each front surface of the band belt 54 and the narrow belt 75).

As described above, when the front surface 51a of the rocking body 51 is sucked by the vacuum device 7 with respect to the product film C to be transferred, the rocking body 51 swings rearward from the front position 51 '. In this case, even if the product film C receives wind pressure on the back surface of the product film C, the product film C
Does not bend on the side of the front surface 51a. Therefore, the expected folding line position of the product film C does not shift.

The oscillating device 6 is of a crank type. The arm 62 is rotated by a motor 61, so that the arm 62 and an oscillating body side plate 55 are connected via a connecting rod 63. The rocking body 51 is rocked back and forth. The position of the connecting portion 64 between the arm 62 and the connecting rod 63 can be adjusted in the longitudinal direction of the arm 62. By adjusting the position of the connecting portion 64 (the effective length of the arm 62). The amplitude of the oscillating body 51 can be adjusted. When the amplitude of the rocking body 51 is changed, the folding width of each folding piece E can be changed. Also, a transmission can be provided between the motor 61 and the arm 62 to make the rotation speed of the arm 62 variable,
In this case, the folding width of the folding piece E can be adjusted by changing the swing speed of the swinging body 51 without changing the effective length of the arm 62 (without changing the amplitude of the swinging body 51). That is, when the swinging speed of the swinging body 51 is reduced, the product film C is moved within the time when the swinging body 51 moves between the front swinging position indicated by reference numeral 51 'and the rear swinging position indicated by reference numeral 51 ". When the folding length of the folding piece E to be folded is increased due to the extended feeding length, and the swinging speed of the swinging body 51 is increased, the folding width of the folding piece E is narrowed for the opposite reason. Become.

The oscillating device 6 includes an oscillating body 51 as shown in FIG.
From the vertical position shown by a solid line, as shown by reference numerals 51 ′ and 51 ″, an equal angle a (angles 20 to 30)
°). In this way, the swinging body 51 is equiangularly forward and backward with respect to the vertical posture position.
When each of the foldable pieces E is folded in the same manner as in the conventional example (FIGS. 10 and 11), the foldable pieces E are folded in a uniform width as compared with the case where only the front side swings from the vertical posture position as in the conventional example (FIGS. 10 and 11). The piece E can be folded in a state where the folding lines on both side edges are sequentially aligned at the same position. When the amplitude of the rocking body 51 is equally distributed in the front-rear direction from the vertical posture position,
The rocking body 51 is positioned rearward of the vertical posture position (reference numeral 5).
When the product film C swings to the position 1 "), the product film C tends to separate from the rocker front surface 51a.
When the press roll 56 is provided at the front end of the rocking body 51, the product film C does not separate from the rocking body front end, and the folding line of the folding piece E is always aligned at a fixed position. In this case, the vacuum device 7 also functions so that the product film C does not separate from the front surface 51a of the rocking body 51.

Below the swing-off device 5, a cradle device 8 for supporting folding pieces E which are sequentially folded in a zigzag manner.
Is provided. The cradle device 8 of the first embodiment shown in FIGS. 1 to 5 includes a pair of left and right long cradles 82 that are considerably narrower than the folding width of the folding piece E, just below the intermediate position of the amplitude of the rocking body 51. It is supported by a support 81. In the first embodiment, a roll rotatable with respect to the support column 81 is employed as the receiving table 82. The roll 82 may be lockable by an appropriate locking means, and the roll 82 may be locked to the support column 81 during the folding operation by the swing-off device 5. The pedestal 82 can be made of any suitable material as long as it is a long object such as a square pipe or a narrow flat plate instead of a roll.

In the cradle device 8 of the first embodiment,
By the tilting device 83, the support column 81 is set to the upright posture and the reference numeral 81 '.
It can be displaced between a forward inclined posture shown in FIG. 1 (substantially horizontal posture in the illustrated example). The tilting device 83 tilts the support column 81 via a worm gear 85 by a motor 84. The tilting device may be replaced with a manual handle.

Before the folding of the product film C is started, the receiving stand device 8 places the support column 81 in an upright posture, and positions the roll 82 so as to be located immediately below the intermediate position of the amplitude of the rocking body 51. Then, when the folding operation of the product film C is started in this state, the intermediate portion of the folding width of the folding piece E, which is sequentially folded from the lower end of the rocking body 51, is placed on the receiving table (roll) 82, and Each of the folding pieces E is sequentially laminated with the front and rear side edges thereof being distributed to the front and rear of the receiving table 82. After that, when the folding operation of the product film C of the predetermined length is completed (the product film C is cut by the cross cutter 10), the support column 81 which has been in the upright posture by the tilting device 83 is indicated by reference numeral 81 '. Flip forward. Then, the pedestal approaches the floor surface as indicated by reference numeral 82 ', and the folded laminated film F' on the pedestal also approaches the floor surface. Then, the lock of the cradle (roll) 82 'is released,
When the folded laminated film F 'is pulled in the direction of the arrow, the cradle (roll) 82' rolls, and the folded laminated film F 'can be smoothly dropped on the floor.

The folding machine according to the embodiment shown in FIGS.
There are the following usage methods.

First, if the customer order has a standard size width (for example, the developed width is 8 m), the width corresponding to the width (W ₀₎
= 4 m), and the raw material roll A on which the tubular band-shaped film B is wound is placed on the feeding device 1. In this case, one blade 21 is used as the slitter device 2, and the blade 21 is positioned at a middle portion in the width direction of the band-shaped film B. Further, in this case, since the film of the excess width is not generated, the winding device 4
Is not used. Then, while feeding the band-shaped film B by a small distance, the front end of the band-shaped film is passed through the slitter device 2 and each roll, and further passed between the pressing roll 56 and the band belt 54 at the front end of the rocking body 51. The receiving device 8
Keep the column 81 in an upright posture. When each device is driven in this state, the strip film B is fed from the material roll A by the feeding device 1, and a slit is formed in one of the strip films B by the slitter device 2,
A band-shaped film (to be a product film C) is placed on the receiving table 82 of the receiving apparatus 8 while being sequentially folded in a zigzag manner from the tip of the rocking body 51 by the swing-off device 5.
At this time, the oscillating body 51 oscillates in an equiangular range a before and after the vertical posture position, and the product film C is held by the pressing roll 56 at the tip of the oscillating body 51, and the product film C is further evacuated by the vacuum device 7. Are successively folded in a state of being sucked toward the rocker front surface 51a, so that the folding width of each folding piece E becomes uniform and the folding lines (side edges) of each folding piece E come to be neatly aligned. In addition, each folding piece E
The intermediate part of the folding width is placed on the receiving table 82, and both side edges are distributed before and after the receiving table 82 and are stacked in a hanging state. At this time, since the folded portions are formed on both side edges of each of the folded pieces E, the thickness is increased, but the folded portions E are stacked with the folded width middle portion being high. As described above, when each of the folding pieces E straddles the front and rear of the receiving table 82 and is placed with both side edges hanging down, the respective folding pieces E do not shift in the folding width direction. Then, when the product film C is cut at the required length position by the cross cutter 10 and folded to the end of the cut-off film on the folding laminated film F, the folding operation is completed. Then, the cradle device 8
The support 81 may be turned down as shown by reference numeral 81 'in FIG. 1 and the folded laminated film F' on the receiving table 82 may be pulled out forward.

Next, when the customer's order width does not match the standard size, a belt-shaped film B (raw material roll A) having a perimeter larger than the order width is used. For example, in order width 7m, close to it peripheral length of the standard size in the case of 8m, width W ₀ uses tubular strip film B of 4m. Then, as shown in FIG. 2, the two cutters 21 and 21 are attached to the slitter device 2.
The blades 21 and 21 are distributed to the left and right from the center in the width direction of the band-shaped film B and are set at the same interval as the surplus width (width W _{1 in} FIG. 3). Further, the winding device 4 for winding the excess width film D is used, and the leading end of the cut film D cut by each of the blades 21 and 21 is guided to the winding portion of the winding device 4 while being slightly fed. The leading end of the cut film is wound around a core 40 set there. Note that the leading end of the product film C from which the cut film D has been removed is guided to the leading end of the rocking body 51 while being slightly fed. When each device is driven in this state, the cut film D cut by the slitter device 2 is wound by the winding device 4 around the core 40 in a state where the film side ends are aligned. (The roll film G is formed.) On the other hand, the product film C from which the cut film D has been removed is sequentially folded in a zigzag manner by the swing-off device 5 as described above. Then, when the product film C is cut at the required length position by the cross cutter 10 and folded to the end of the cut-off film on the folding laminated film F, the folding operation is completed. The roll film G wound on the core 40 is cut off from the strip film B by cutting the cut film D between the slitter device 2 and the winding device 4, and the winding film 40 is wound together with the winding core 40. Remove it from. In this case, for example, a roll film G having a width of 1 m can be obtained as a by-product. still,
Since the roll film G is wound in an aligned state, it can be reused (commercialized) as a small-width film.

Further, as the tubular band-shaped film B, a considerable surplus width (for example, 2
In the case where a film having a width of m or more is used and the film of the surplus width portion is wound into a roll in a state where the film is further divided into two parts, the following is performed. That is, three cutters 21 are used for the slitter device 2, and the slitter device 2 cuts the product film C and the two cut films D, D. Then, the product film C is sent to the shake-off device 5 as it is, zigzag folded, and the remaining cut films D, D
Are guided to the front winding device 4 and the rear winding device 4A, respectively, where they are wound into rolls (two roll films G are formed).

Further, in this folding machine, a wide band-like film B (raw material roll A) can be moved in the width direction only by the slitter device 2 and the two winding devices 4, 4A without using the swing-off device 5. It can also be used to wind each of the two divided rolls.

The folding machine of this embodiment can be applied to the processing of a gusseted band-shaped film or a single band-shaped film in addition to the tubular band-shaped film B in the illustrated example.

The receiving device 8 of the second embodiment shown in FIG.
The receiving table 82 made of a roll can be moved up and down by an elevating device 86. The elevating device 86 attaches each elevating body 87 to both ends of the receiving table 82, and supports each elevating body 87 with a screw bolt 88. Then, by rotating the screw bolt 88 by the motor 89, the elevating body 87 and the receiving table 82 can be moved between the upper movement position in FIG. 6A and the lower movement position in FIG. 6B. Has become. When the folded laminated film F on the receiving table 82 is pulled in the direction of the arrow at the lower position shown in FIG.
2 'rolls, and the folded laminated film F can be smoothly dropped on the floor.

The cradle device 8 of the third embodiment shown in FIG.
Two front and rear receiving plates 82, 82 are used as a receiving table attached to the upper position of the support column 81. These receiving plates 82, 82
Can be changed by the opening / closing device 90 between the state shown in FIG. 7A and the state shown in FIG. 7B. That is, this opening / closing device 90 uses a telescopic cylinder 91, and the rod end of the telescopic cylinder 91 and the receiving plates 82, 82 are connected by arms 92, 92, respectively. Then, in a state where the telescopic cylinder 91 is reduced, the front and rear receiving plates 82, 82 fall down as shown in FIG.
When the telescopic cylinder 91 is extended, the distance between the upper ends of the two and 82 becomes considerably smaller than the folding width of the folding piece E.
As shown in (B), the front and rear receiving plates 82, 82 are arranged at the same height and in a horizontal posture. Therefore, in the cradle device 8 of the third embodiment, during the folding operation of the product film C, the two receiving plates 82 are folded down as shown in FIG. The two side edges are sequentially laminated in a state of being distributed before and after the receiving table (receiving plates 82, 82). After that, when the folding operation of the product film C having the predetermined length is completed, the telescopic cylinder 91 is extended as shown in FIG. Can be pulled out in the direction of the arrow in a horizontal state.

[0042]

According to the agricultural film folding machine of the present invention, the strip film B unwound from the raw material roll A is cut by the slitter device 2, and the product film C is shaken down by the zigzag folding device 5. While the laminated film F can be processed, the cut-off film D having an excessive width can be wound into a roll by the winding device 4 in a state where the film side ends are aligned. Therefore, when the folding machine of the present application is used, what had to be discarded in the conventional folding machine but had to be discarded can be reused (commercialized) as a roll film G having a small width. Effective utilization can be achieved. Further, since the cut-off film D can be automatically wound by the winding device 4, no man-hour is required for processing the cut-off film D, and the trouble of disposing of the cut-off film as in the related art is unnecessary. This has the effect.

[Brief description of the drawings]

FIG. 1 is a schematic side view of an agricultural film folding machine according to an embodiment of the present invention.

FIG. 2 is a partial perspective view of the folding machine of FIG.

FIG. 3 is an explanatory diagram of functions of the folding machine of FIG. 1;

FIG. 4 is a side view of a swing-off device portion of the folding machine of FIG. 1;

FIG. 5 is a left side view of the swing-off device of FIG. 4;

FIG. 6 is another structural view of the cradle device used in the folding machine according to the embodiment of the present application.

FIG. 7 is still another structural view of the cradle device used in the folding machine according to the embodiment of the present application.

FIG. 8 is a process diagram of a folding laminated film used for a greenhouse.

FIG. 9 is a work explanatory diagram when the folding laminated film is stretched on a frame of a greenhouse.

FIG. 10 is a schematic side view of a conventional folding machine.

FIG. 11 is a side view of a swing-off device portion of the folding machine of FIG. 10;

[Explanation of symbols]

1 is a feeding device, 2 is a slitter device, 3 is a sorting unit,
4 is a winding device, 5 is a swing-off device, 6 is a swinging device, 7
Is a vacuum device, 8 is a cradle device, 40 is a core, 51 is an oscillating body, 54 is a belt belt, 56 is a press roll, 81 is a support, 82 is a cradle, A is a raw roll, B is a band film,
C is a product film, D is a cut film, E is a folding piece,
F is a folded laminated film, and G is a roll film.

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-60-26572 (JP, A) JP-A-57-51637 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) B65H 45/00-45/30 B65H 18/00-18/28

Claims (1)

(57) [Claims] 1. A strip film (B) unwound from a web roll (A) is cut by a slitter device (2) in the film length direction by an excess width (W ₁ ) of the strip film (B). An agricultural film folding machine in which a strip film (C) having a product width is successively folded in a zigzag manner by a swing-off device (5), wherein the surplus width (W) cut off by the slitter device (2). ₁ )
A winding device (4) for winding the cut film (D) from above around the winding core (40) so that the film side ends thereof are aligned, the folding machine for agricultural films.