Unraveling machine

Abstract

To provide an unraveling machine capable of unraveling a wide film without wrinkles.SOLUTION: An unraveling machine that spreads out a film being transported, and can unravel the film without wrinkles includes: a conveyor device 31 in which a width of a downstream side in a conveying direction is wide enough to convey an entire width of a singular, single-row continuous film 6 in which the film has been spread, and a width of an upstream side in the conveying direction is narrower than the width of the downstream side in the conveying direction and enough to convey only a center part in the width direction of the singular, single-row continuous film 6, in a conveying part 30 for conveying the film conveyed from a supply part 20; and V-shaped guides that are provided along both sides of the conveyor device 31 in a width direction to guide the film to a transport surface 31a of the conveyor device 31.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a film unwinding machine for unwinding a cylindrical continuous film, which is a long cylindrical film, into a single single-line continuous film, which is a long sheet-like film. [Background technology]

[0002] Patent Document 1 discloses an apparatus (corresponding to a winding machine) that unwinds a cylindrical molded product (corresponding to a cylindrical continuous film) extruded from an extruder into a flat sheet (corresponding to a single-line continuous film). This device has a cutting means for continuously cutting the lower side of the cylindrical molding extruded from the extruder in the axial direction, a truncated cone-shaped guide member for expanding the cut molding into a flat sheet, a guide roll for pulling the expanded flat sheet outward, and a take-up means for transporting the molding, and separates the cylindrical molding extruded from the extruder into a flat sheet. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2005-280138 A Summary of the Invention [Problem to be solved by the invention]

[0004] In conventional devices, the cylindrical molding cut by the cutting means is expanded by a truncated cone-shaped guide member to form a flat sheet, so as the width (dimension in the direction perpendicular to the conveying direction) of the flat sheet increases, the size of the truncated cone-shaped guide member increases. Since the size of the truncated cone-shaped guide member is limited due to manufacturing reasons, there is a limit to the width of the flat sheet that can be manufactured, and it is not possible to manufacture a wide flat sheet. For example, sheets for large agricultural vinyl greenhouses are 4,500 mm or wider, and it is not possible to manufacture sheets this wide.

[0005] The present invention has been made to solve the above problems, and its purpose is to provide a film unrolling machine that is not limited by the width of the film that can be unrolled and can unroll wide films, such as wide films with a width of 4,500 mm or more that are used in large agricultural vinyl greenhouses. [Means for solving the problem]

[0006] The unrolling machine of the present invention is equipped with a conveying section which conveys a film while spreading it, and a supply section which supplies the film to the conveying section, wherein the conveying section has a width on the downstream side in the conveying direction which is wide enough to convey the entire width of the single-row continuous film into which the film has been spread, and a width on the upstream side in the conveying direction which is narrower than the width on the downstream side in the width direction and which conveys only the central part of the single-row continuous film in the width direction, and is characterized in that the conveying section is equipped with a conveying conveyor device which widens in a V-shape toward the downstream side in the conveying direction, and a V-shaped guide which is V-shaped and widens toward the downstream side in the conveying direction, and is arranged along both sides in the width direction of the conveying conveyor device, guiding the film to the conveying surface of the conveyor device.

[0007] In the unwinding machine of the present invention, a post-processing section is provided downstream of the conveying section, and the transport conveyor device has the function of conveying the film and the single-row continuous film while suctioning them, and the unwinding machine can be configured to convey the film and the single-row continuous film toward the post-processing section while suctioning them. According to the unwinding machine of this configuration, it is possible to unwind the film into a single continuous line without any wrinkles.

[0008] In the roll-removing machine of the present invention, the V-shaped guide is provided with a suction port that sucks in the film, and the roll-removing machine can guide the film to the conveying surface of the transport conveyor device while sucking in the film. With this configuration of the unwinding machine, a strong pulling force acts on the film guided by the V-shaped guide and transported to the transport surface of the transport conveyor in both width directions, so that the film can be transported stably.

[0009] In the unwinding machine of the present invention, the conveying section may be a unwinding machine equipped with a conveying section pressure roller that applies a tensile force to spread the single-row continuous film in the width direction on the conveying surface of the transport conveyor device.

[0010] In the unwinding machine of the present invention, the supply section is equipped with a conveying direction cutter that cuts, along the conveying direction, the upper film of a tubular continuous film that is crushed and supplied in a flattened state by an upper film and a lower film, and the unwinding machine can transport the tubular continuous film with the upper film cut along the conveying direction by the conveying direction cutter to the transport section. By using a roll-removing machine with this configuration, the cut upper film can be spread out and removed into a wide film.

[0011] In the unwinding machine of the present invention, the supply section may be a unwinding machine equipped with a buffer section that transports, from top to bottom, the tubular continuous film from which the upper film has been cut. With a unwinding machine of this configuration, the cut tubular film is transported vertically, so that the cut upper and lower films do not overlap due to their own weight, making it easy to unfold the upper film.

[0012] In the unwinding machine of the present invention, the supply section includes a buffer section which transports from top to bottom the tubular continuous film from which the upper film has been cut, and an air blowing device which is provided in the buffer section and has a plurality of air blowing ports which blow air in a direction to spread the upper film from the inside to the outside, and the upper film can be transported to the conveying section while being spread by the air from the air blowing ports. According to the unwinding machine having this configuration, the upper film is transported to the transport conveyor device in a spread state, so that the upper film can be easily spread by the transport conveyor device.

[0013] In the unwinding machine of the present invention, the air blowing outlets are provided at the upper and lower parts of both sides in the width direction of the buffer section, the air blowing amount of the upper air blowing outlet is greater than the air blowing amount of the lower air blowing outlet, and the multiple air blowing outlets can be arranged in a V-shape. With this configuration of the unwinding machine, the air blown out from the air outlet can spread the upper film with great force, making it possible to spread the upper film of a wide tubular continuous film.

[0014] In the unwinding machine of the present invention, the buffer section is equipped with a static elimination device that removes static electricity charged to the upper film and the lower film, and the static elimination device is attached along the air outlet, and the upper film and the lower film can be transported to the conveying section while being de-electrified by the static elimination device. With a film unwinder of this configuration, static electricity built up on the upper and lower films of a wide tubular continuous film can be reliably removed, and the static electricity does not make it difficult for the upper film to unfold.

[0015] In the unwinding device of the present invention, a post-processing section is provided downstream of the conveying section, and the post-processing section is equipped with a swivel device that supports the single-row continuous film and oscillates up and down on the downstream side in the conveying direction with the upstream side in the conveying direction as a fulcrum, thereby enabling the unwinding machine to fold the single-row continuous film in an accordion-like shape. With the unwinding machine of this configuration, a product can be made that is folded in an accordion shape.

[0016] In the unwinding machine of the present invention, a post-processing section is provided downstream of the conveying section, the supplying section is provided with a supplying section width direction cutter which cuts the film along the width direction perpendicular to the conveying direction, and the post-processing section is provided with a post-processing section width direction cutter which cuts the single single-row continuous film along the width direction perpendicular to the conveying direction. When a plurality of cut products of any combination of sizes are continuously produced from the film, the cutting of the products is normally performed by the post-processing section width direction cutter according to the conveying amount of the film, and only the cutting upstream of the last product to be produced is performed by the supplying section width direction cutter, and this control is calculated from the total length of the products continuously produced, the length between the supplying section width direction cutter and the post-processing section width direction cutter, and the conveying amount. According to the unwinder having this configuration, the film is not left downstream of the width direction cutter of the supply section, so that the generation of waste can be prevented.

[0017] In the unwinding machine of the present invention, the calculation of the transport amount for determining the timing of cutting by the supply section width direction cutter is calculated from the amount of rotation of the supply section drive roller, the calculation of the transport amount for determining the timing of cutting by the post-processing section width direction cutter is calculated from the amount of rotation of the post-processing section drive roller, and the transport amount for determining the timing of cutting by the supply section width direction cutter is calculated from the amount of rotation of the post-processing section drive roller, and the transport amount for determining the timing of cutting by the supply section width direction cutter is calculated by adding the amount of slack generated in the film between the supply section and the post-processing section to the calculation of the transport amount for determining the timing of cutting by the supply section width direction cutter when the film is set up to the post-processing section width direction cutter and before the film is continuously cut to start manufacturing products. With this configuration of the unwinder, the product can be cut so that no film remains downstream of the supply section width direction cutter, without being affected by the amount of slack in the film between the supply section width direction cutter and the post-treatment section width direction cutter.

[0018] In the film unwinding machine of the present invention, the control can be interrupted at any timing during the control, and cutting is performed by the supply section width direction cutter at the point of interruption, and the post-processing section width direction cutter continues cutting at the cutting timing before the interruption, and when the length of the film remaining in the conveying section is such that a product cannot be manufactured in the post-processing section at the cutting timing before the interruption, the film remaining in the conveying section can be discharged to the post-processing section. With a roll-up machine of this configuration, while a product is being processed downstream of the conveying section, preparations for the production of the next product, such as replacing the film being supplied in the supply section, can be made in parallel, thereby improving work efficiency. Effect of the Invention

[0019] According to the unwinding machine of the present invention, there is no restriction on the width of the film that can be unwound, and it is possible to unwound wide films having a width of 4500 mm or more, which are used in large agricultural vinyl greenhouses. [Brief description of the drawings]

[0020] [Figure 1] FIG. 2 is an explanatory diagram showing an example of the unwinding operation by the unwinding machine of the present invention. [Diagram 2] FIG. 2 is a top view showing the overall configuration of the unwinding machine. [Diagram 3] FIG. 2 is a side view showing the overall configuration of the unwinding machine. [Figure 4] FIG. [Diagram 5] FIG. 4 is a front view of the supply unit as viewed from the transport unit side. [Figure 6] FIG. [Figure 7] FIG. [Figure 8] FIG. [Figure 9] FIG. [Figure 10] 4 is a front view of the post-processing section as viewed from the downstream side in the transport direction. FIG. [Figure 11] FIG. 4 is a front view of the post-treatment section width-direction cutter. [Figure 12] FIG. [Figure 13] FIG. [Figure 14] FIG. 2 is a schematic diagram showing a case where a plurality of products are produced by the unwinding machine of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] An embodiment of the unwinding machine of the present invention will be described. First, an example of the operation of unwinding a tubular continuous film into a single single-line continuous film by the unwinding machine of the present invention will be described with reference to Fig. 1. Fig. 1 is an explanatory diagram showing an example of the unwinding operation by the unwinding machine of the present invention, and there are some differences from the operation by the embodiment of the unwinding machine of the present invention described later. As shown in FIG. 1(a), a tubular continuous film 1 is compressed in a radially flattened state and wound into a roll to form a roll body 2, and by unwinding the roll body 2, the tubular continuous film 1 in a flattened state is transported in the longitudinal direction along a transport surface (not shown) as indicated by arrow A. The flat state is a state in which the upper film 3, which is the upper surface relative to the conveying surface, and the lower film 4, which is the lower surface relative to the conveying surface, overlap each other, but in Figure 1(a) they are shown in an elliptical shape for ease of understanding.

[0022] As shown in Figure 1(b), the widthwise center of the upper film 3 of the transported tubular continuous film 1 is continuously cut along the transport direction, and the upper film 3 is separated into one widthwise side portion 3a and the other widthwise side portion 3b at the cut position. Air is blown between one widthwise side portion 3a of the upper film 3 and the lower film 4 as shown by arrow B, spreading one widthwise side portion 3a of the upper film 3 to one side in the width direction as shown by arrow C, and air is blown between the other widthwise side portion 3b of the upper film 3 and the lower film 4 as shown by arrow D, spreading the other widthwise side portion 3b of the upper film 3 to the other side in the width direction as shown by arrow E, resulting in film 5 in a state in which one widthwise side portion 3a and the other widthwise portion 3b of the upper film 3 are spread.

[0023] While the spread-out film 5 is further transported, a pulling force is applied to one side in the width direction as shown by arrow F and a pulling force to the other side in the width direction as shown by arrow G to the spread-out film 5, so that the film 5 is unwrinkled and released into a single, single-row continuous film 6. As shown in FIG. 1(c), a single continuous film 6 is cut in the width direction perpendicular to the conveying direction and folded in an accordion-like shape to form a product 7.

[0024] Next, the overall configuration of the roll unwinder of the present invention will be described with reference to Figures 2 and 3. Figure 2 is a top view showing the overall configuration of the roll unwinder, and Figure 3 is a side view showing the overall configuration of the roll unwinder. As shown in FIGS. 2 and 3, the unwinding machine 10 includes a supply section 20, a transport section 30, and a post-processing section 40, and unwinds the tubular continuous film 1 into a single-line continuous film 6 as shown in FIG. That is, a roll 2 on which a tubular continuous film 1 is wound is held in the supply section 20, and the widthwise center of the upper film 3 of the flattened tubular continuous film 1 pulled out from the roll 2 is continuously cut in the conveying direction by a conveying direction cutter 21 shown in Figure 3, and the widthwise one side portion 3a and the widthwise other side portion 3b are spread out to one widthwise side and the other widthwise side by blowing air thereon, and then conveyed to the conveying section 30 (see Figure 1(b)).

[0025] As the film is transported by the conveying section 30 toward the post-processing section 40, pulling forces are applied to one side in the width direction and the other side in the width direction, causing the film to be unwrinkled and become a single, single-row continuous film 6 (see Figure 1(b)). The single-row continuous film 6 is transported to the post-processing section 40, where it is folded in an accordion shape and cut widthwise by the post-processing section width-direction cutter 41 shown in FIG. 3 according to a desired transport amount, to produce a product 7 folded in an accordion shape (see FIG. 1(c)). The product 7 processed by the roll-removing machine 10 is used in large agricultural vinyl greenhouses and the like.

[0026] The configuration of the supply unit will be described with reference to Figures 4 and 5. Figure 4 is a side view of the supply unit, and Figure 5 is a front view of the supply unit as viewed from the transport unit side. 4 and 5, supply section 20 includes a roll body holding section 22, supply section width direction cutter 23, the previously described feed direction cutter 21, supply section conveying device 24, and buffer section 25, spaced apart in the feed direction of tubular continuous film 1. Supply section width direction cutter 23, feed direction cutter 21, supply section conveying device 24, and buffer section 25 are attached to supply section frame 20a. The roll body holding unit 22 is provided on the installation surface 8 of the unwinding machine 10, and has two holding rollers 22a. The roll body 2, which is an original web, is rotatably held on the two holding rollers 22a, and is drawn out and transported by the supply section transport device 24. The side surfaces of the roll body 2 in the width direction are fixed in their widthwise positions by members (not shown) provided on the roll body holding unit 22, so that they do not move in the widthwise direction.

[0027] The supply section width direction cutter 23 is located downstream in the conveying direction of the roll body holding section 22 and upstream in the conveying direction of the conveying direction cutter 21, and is used to cut the tubular continuous film 1 in the width direction before it is cut in the conveying direction by the conveying direction cutter 21. The configuration of the supply section width direction cutter 23 and the control over the width direction cutting will be described in detail later. The conveying direction cutter 21 is located downstream in the conveying direction of the supply section width direction cutter 23 and upstream in the conveying direction of the supply section conveying device 24, and is used to continuously cut the upper film 3 of the tubular continuous film 1 along the conveying direction. The conveying direction cutter 21 is configured to be switchable between cutting the upper film 3 of the tubular continuous film 1 at one location along the conveying direction and cutting at two locations spaced apart at a fixed interval to adjust the width of the unwound single-row continuous film 6. The configuration of the conveying direction cutter 21 will be described in detail later.

[0028] The tubular continuous film 1 (hereinafter referred to as tubular continuous film 1 cut along the conveying direction) that has been continuously cut along the conveying direction at the widthwise center of the upper film 3 by the conveying direction cutter 21 is transported toward the buffer section 25 by the supply section conveying device 24, but when the upper film 3 is cut in two places by the conveying direction cutter 21, the portion of the film between the two cut positions is not transported toward the supply section conveying device 24, and therefore becomes wasted film. In order to discharge this waste film, it is discharged outside the unwinding machine 10 by a waste part discharge mechanism 26 such as a conveyor provided downstream in the conveying direction of the supply section conveying device 24 as shown in FIG. The discharged waste film is disposed of in any desired manner, such as by being collected by a winding device (not shown).

[0029] The supply section conveying device 24 is located downstream in the conveying direction of the cutter 21 and upstream in the conveying direction of the buffer section 25 , and pulls out the tubular continuous film 1 from the roll 2 . The supply section conveying device 24 is composed of a supply section drive roller 24a that is rotated by a drive device not shown, and a supply section nip roller 24b that is provided above the supply section drive roller 24a and nips the tubular continuous film 1 between the supply section drive roller 24a. The supply section drive roller 24a is a long roller that is continuous in the width direction of the tubular continuous film 1, and the supply section nip rollers 24b are short rollers that are shorter than the width of the tubular continuous film 1 and are arranged at intervals in the width direction of the tubular continuous film 1. The position of the supply section nip roller 24b is controlled depending on the operating conditions of the unwinding machine 10 so that it is in a nip position where it nips the tubular continuous film 1 with the supply section drive roller 24a, and in a non-nip position where it is separated from the supply section drive roller 24a and does not nip the tubular continuous film 1.

[0030] An example of control of the position of the supply section nip roller 24b will be described. Select the supply unit nip roller 24b as the nip position according to the width of the flat cylindrical continuous film 1. For example, the supply unit nip roller 24b located within the width of the flat cylindrical continuous film 1 is set as the nip position, and the supply unit nip roller 24b located outside the width is set as the non-nip position. This operation can be automatically performed according to the width. Also, when transporting the cylindrical continuous film 1, set the supply unit nip roller 24b as the nip position, and when the transportation of the cylindrical continuous film 1 is completed, set the supply unit nip roller 24b as the non-nip position. In this way, when restarting the transportation of the cylindrical continuous film 1, it is easy to perform the operation of pulling out the cylindrical continuous film 1 to the supply unit driving roller 24a and setting it. Automatically performing this operation makes the operation even easier.

[0031] For example, when transporting the cylindrical continuous film 1, the supply unit nip roller 24b automatically becomes the nip position, and the cylindrical continuous film 1 is cut by the supply unit width direction cutter 23. The cylindrical continuous film 1 is transported by the supply unit transport device 24 without being pulled out from the roll body 2. When the rear end in the transport direction of the cylindrical continuous film 1 passes through the supply unit transport device 24 and disappears from above the supply unit driving roller 24a, the supply unit nip roller 24b is automatically moved to the non-nip position to set the state for pulling out and setting the next cylindrical continuous film 1 to be unwound to the supply unit transport device 24. By doing so, the workability of unwinding the cylindrical continuous film 1 is improved.

[0032] The buffer unit 25 transports the cylindrical continuous film 1 cut along the transport direction toward the transport unit 30 while forming it into a film 5 in which one side portion 3a and the other side portion 3b in the width direction of the upper film 3 spread to both sides in the width direction (see (b) of FIG. 1). The buffer unit 25 includes an upper transport roller 28a on the upstream side in the transport direction provided at the upper part of the buffer unit frame 27, a pair of intermediate transport rollers 28b in the width direction provided at the upper and lower intermediate parts, and a lower transport roller 28c on the downstream side in the transport direction provided at the lower part. The tubular continuous film 1 cut along the conveying direction conveyed by the supply section conveying device 24 is conveyed toward the upper conveying rollers 28a, whereby the lower surface of the lower film 4 comes into contact with the upper conveying rollers 28a, while the upper film 3 does not come into contact with the upper conveying rollers 28a, so that the lower film 4 is conveyed downward toward the lower conveying rollers 28c, and then conveyed from the lower conveying rollers 28c toward the conveying section 30.

[0033] The upper film 3 is in a state in which it can spread without coming into contact with the upper conveying rollers 28a, and one widthwise side portion 3a and the other widthwise side portion 3b spread toward both widthwise sides by air blown from an air blowing device 50, which will be described later, and is conveyed downward by the intermediate conveying rollers 28b. In other words, the intermediate conveying rollers 28b are located downstream in the conveying direction and below the upper conveying rollers 28a, and the lower surfaces of the spread one widthwise side portion 3a and the other widthwise side portion 3b come into contact with the intermediate conveying rollers 28b and are conveyed downward. This makes it possible to prevent the widthwise one side portion 3a and the widthwise other side portion 3b of the expanded upper film 3 from overlapping the lower film 4 again. As such, since the middle conveying roller 28b is located between the lower film 4 and the upper film 3, it is shorter than the upper conveying roller 28a and is attached in a cantilevered state so as to be rotatable in the widthwise center of the buffer section frame 27. The conveying section from the upper conveying rollers 28 a to the conveying section 30 is the buffer section 25 .

[0034] The buffer section 25 includes an air blowing device 50 and a static eliminator 60 . As shown in FIG. 5 , the air blowing device 50 includes one-side air supply source 51 such as a blower and another-side air supply source 52 provided on both sides of the buffer unit frame 27 in the width direction perpendicular to the conveying direction of the cylindrical continuous film 1, one-side air piping 53 connected to the one-side air supply source 51, and another-side air piping 54 connected to the other-side air supply source 52. The one-side air piping 53 and the other-side air piping 54 blow air from a portion cut and separated along the conveying direction of the cylindrical continuous film 1 (between one width direction portion 3a and the other width direction portion 3b of the upper film 3) to the lower film 4. and enters between one widthwise side portion 3a and the other widthwise side portion 3b of the upper film 3, so that one-side air piping 53 splits into two to form one-side upper air outlet 55 and one-side lower air outlet 56 which blow air between the lower film 4 and the one widthwise side portion 3a of the upper film 3 of the tubular continuous film 1, and the other-side air piping 54 splits into two to form another-side upper air outlet 57 and another-side lower air outlet 58 which blow air between the lower film 4 and the other widthwise side portion 3b of the upper film 3 of the tubular continuous film 1.

[0035] Since one widthwise side portion 3a and the other widthwise side portion 3b of the upper film 3 of the tubular continuous film 1, which is cut along the conveying direction, gradually expand as it is conveyed, the boundary with the lower film 4 gradually moves closer to both sides in the width direction as it is conveyed.Therefore, as shown in Figure 5, the upper air outlet 55 on one side and the upper air outlet 57 on the other side are located closer to the center in the width direction of the tubular continuous film 1, and the lower air outlet 56 on one side and the lower air outlet 58 on the other side are located closer to both sides in the width direction of the tubular continuous film 1. In other words, the four air outlets 55, 56, 57, and 58 are arranged in a V-shape facing downward (in the conveying direction). The four air outlets 55, 56, 57, 58 face obliquely upward and open toward both sides in the width direction, so as to expand one width direction side portion 3a and the other width direction side portion 3b of the upper film 3 while pushing them up obliquely upward and outward in the width direction. In addition, the size (diameter) of one-side upper air outlet 55 and the other-side upper air outlet 57 is larger than the size (diameter) of one-side lower air outlet 56 and the other-side lower air outlet 58, so that the air blowing amount of upper air outlets 55, 57 is greater than that of lower air outlets 56, 58, and the spreading force of the upper side is stronger than that of the lower side.

[0036] Therefore, the one-side upper air outlet 55 and the one-side lower air outlet 56 are located near the boundary between the lower film 4 and the upper film 3 of the tubular continuous film 1 cut along the conveying direction in which it is conveyed through the buffer section 25, and the air blown out can spread the one widthwise portion 3a with great force, and the other-side upper air outlet 57 and the other-side lower air outlet 58 are located near the boundary between the lower film 4 and the upper film 3 of the tubular continuous film 1 cut along the conveying direction in which it is conveyed through the buffer section 25, and the air blown out can spread the other widthwise portion 3b with great force, thereby spreading the one widthwise portion 3a and the other widthwise portion 3b of the upper film 3 of the wide tubular continuous film 1. Furthermore, as shown in FIG. 4, the lower film 4 is transported obliquely downward as it is transported from the upper transport rollers 28a to the lower transport rollers 28c, and therefore the one-side lower air outlet 56 and the other-side lower air outlet 58 are positioned closer to the transport section 30 than the one-side upper air outlet 55 and the other-side upper air outlet 57 so that the distances between the lower film 4 and each of the air outlets 55, 56, 57, 58 are the same.

[0037] In this way, one widthwise side portion 3a and the other widthwise side portion 3b of the upper film 3 are expanded by blowing air, and this can be achieved by changing the positions of the air outlets 55, 56, 57, 58 or by adjusting the air blowing speed and amount in accordance with the width of the cylindrical continuous film 1. Therefore, there is no restriction on the width of the film, and even films such as those used in wide, large agricultural vinyl greenhouses can be expanded. In addition, the cylindrical continuous film 1 transported through the buffer section 25 is transported from top to bottom, and the widthwise side portion 3a and the other widthwise side portion 3b of the upper film 3 and the lower film 4 are transported in a vertical position, so that the widthwise side portion 3a and the other widthwise side portion 3b of the upper film 3 do not come into contact with the lower film 4 due to their own weight, and the widthwise side portion 3a and the other widthwise side portion 3b of the upper film 3 can easily and reliably spread.

[0038] The amount of air blown out from each of the air outlets 55, 56, 57, 58 can be set arbitrarily. For example, the amount of air blown out is set by changing the size (diameter) of each of the air outlets 55, 56, 57, 58. An air supply source is provided for each of the air outlets 55, 56, 57, 58, and the amount of air blown out is set by changing the amount of air supplied. The angle (blow direction), number and size of each of the air outlets 55, 56, 57, 58 can be changed as desired depending on the material, width and thickness of the cylindrical continuous film 1 (film) being conveyed. Furthermore, the air blowing angles of one-side upper air outlet 55 and other-side upper air outlet 57 can be set at an angle upstream in the transport direction from the directions toward one and the other width directions relative to the cutting position, inside the lower film 4 and upper film 3 of the tubular continuous film 1. By setting the angle at this angle, air is blown toward the inside of the lower film 4 and upper film 3 of the tubular continuous film 1 being transported from above (upstream in the transport direction) and in a direction that spreads the upper film 3, so that the tubular continuous film 1 can be transported smoothly and wrinkles on the downstream side can be prevented.

[0039] The air blowing angles of one-side lower air outlet 56 and the other-side lower air outlet 58 are set so as to be directed toward one-side upper air outlet 55 and the other-side upper air outlet 57, relative to the air blowing angles of one-side upper air outlet 55 and the other-side upper air outlet 57. By setting this angle, the air from one-side lower air outlet 56 and the other-side lower air outlet 58 is blown to supplement the air from one-side upper air outlet 55 and the other-side upper air outlet 57, thereby improving the effect of air blowing from one-side upper air outlet 55 and the other-side upper air outlet 57, allowing the tubular continuous film 1 to be transported smoothly and preventing wrinkles on the downstream side. In addition, by arranging the four air outlets 55, 56, 57, and 58 in a V-shape when viewed from the transport direction, even films used in wide, large agricultural vinyl greenhouses can be transported smoothly and wrinkles can be prevented from occurring on the downstream side.

[0040] Static electricity eliminator 60 is attached to buffer unit frame 27 and removes static electricity charged to tubular continuous film 1 as it is transported through buffer unit 25. In other words, because tubular continuous film 1 is transported in a flat state, static electricity is generated between the upper film 3 and the lower film 4, causing the widthwise one side portion 3a and the widthwise other side portion 3b of upper film 3 to stick to the lower film 4 due to static electricity, which prevents the widthwise one side portion 3a and the widthwise other side portion 3b from spreading, so static electricity eliminator 60 is provided to remove static electricity. The static elimination device 60 has a long, rod-shaped width-direction one-side static elimination member 61 and a long, rod-shaped width-direction other-side static elimination member 62, with the width-direction one-side static elimination member 61 being attached facing in the vertical direction so as to be located between the lower film 4 and the upper film 3, and the width-direction other-side static elimination member 62 ...

[0041] The width-direction one-side charge eliminating member 61 is attached at an angle in the width direction with respect to the vertical so that its upper portion is near the width direction center and its lower portion is near one side in the width direction, and the width-direction other-side charge eliminating member 62 is attached at an angle in the width direction with respect to the vertical so that its upper portion is near the width direction center and its lower portion is near the other side in the width direction, and the width-direction one-side charge eliminating member 61 and the width-direction other-side charge eliminating member 62 are attached in a V-shape that widens from top to bottom in the conveying direction. As a result, the width-direction one-side static electricity eliminating member 61 is positioned along the boundary between the width-direction one side portion 3a of the upper film 3 and the lower film 4, and the width-direction other-side static electricity eliminating member 62 is positioned along the boundary between the width-direction other side portion 3b of the upper film 3 and the lower film 4. Therefore, even if the width-direction one side portion 3a and the width-direction other side portion 3b are sequentially widened, static electricity charged to the width-direction one side portion 3a and the width-direction other side portion 3b of the upper film 3 and the lower film 4 can be removed.

[0042] In addition, even in the case of a wide tubular continuous film 1 used in wide, large agricultural vinyl greenhouses, static electricity generated between the upper film 3 and the lower film 4 can be removed, preventing the upper film 3 and the lower film 4 from sticking together due to static electricity, allowing for smooth transport and preventing wrinkles from forming on the downstream side. Furthermore, since the width-direction one-side static electricity eliminating member 61 and the width-direction other-side static electricity eliminating member 62 are arranged adjacent to the four air outlets 55, 56, 57, and 58, the ions generated by the width-direction one-side static electricity eliminating member 61 and the width-direction other-side static electricity eliminating member 62 for static electricity eliminating travel along the flow of air blown out from the four air outlets 55, 56, 57, and 58 toward the space between the width-direction one-side portion 3a of the upper film 3 and the lower film 4, and between the width-direction other-side portion 3b of the upper film 3 and the lower film 4, thereby efficiently removing static electricity. Furthermore, when the width of the tubular continuous film 1 varies, static electricity can be removed by shifting the widthwise positions of the width-wise one-side static electricity removing member 61 and the width-wise other-side static electricity removing member 62 in accordance with the width, making it possible to remove static electricity even from films used in wide agricultural vinyl greenhouses. The width-direction-one-side charge eliminating member 61 and the width-direction-other-side charge eliminating member 62 may be known devices such as ionizers that generate ions to eliminate static electricity.

[0043] The upper conveying roller 28a, the intermediate conveying roller 28b, and the lower conveying roller 28c are configured so that their vertical positions can be adjusted as desired. For example, the roller mounting member 63 and the buffer frame 27 are mounted on the supply frame 20a so as to be vertically movable, the upper conveying roller 28a is mounted on the roller mounting member 63, and the intermediate conveying roller 28b and the lower conveying roller 28c are mounted on the buffer frame 27. With this configuration, the buffer frame 27 moves vertically together with the intermediate conveying roller 28b and the lower conveying roller 28c, so that the positional relationship between the four air outlets 55, 56, 57, 58, the static electricity removing device 60, and the intermediate conveying roller 28b and the lower conveying roller 28c does not change, and therefore the spreading action and the static electricity removing action can be performed by air as described above. In addition, the roller mounting member 63 and the buffer section frame 27 may be fixedly attached to the supply section frame 20a, the upper conveying roller 28a may be attached to the roller mounting member 63 so as to be movable up and down, and the middle section conveying roller 28b and the lower conveying roller 28c may be attached to the buffer section frame 27 so as to be movable up and down. In this case, the positions of the air outlets 55, 56, 57, 58 and the static eliminator 60 are adjusted in accordance with the vertical movement of the upper transport rollers 28a, the intermediate transport rollers 28b and the lower transport rollers 28c. The positions of the upper conveying rollers 28a, the intermediate conveying rollers 28b and the lower conveying rollers 28c can be adjusted with a simpler structure than when the roller mounting member 63 and the buffer unit frame 27 are respectively mounted so as to be vertically movable. The transport distance of tubular continuous film 1 in buffer section 25 is adjusted by adjusting the vertical positions of upper transport rollers 28a, middle transport rollers 28b, and lower transport rollers 28c according to the width of tubular continuous film 1 to be unwound.

[0044] For example, when the width of the tubular continuous film 1 is wide, the widthwise lengths of the widthwise side portion 3a and the widthwise other side portion 3b of the upper film 3 are long, and therefore the conveying distance required to widen the film is long, so the distance between the upper conveying roller 28a and the lower conveying roller 28c is increased to increase the conveying distance. When the width of the tubular continuous film 1 is narrow, the widthwise lengths of the widthwise one side portion 3a and the widthwise other side portion 3b of the upper film 3 are short, and the conveying distance required to widen the film is short, so the distance between the upper conveying rollers 28a and the lower conveying rollers 28c is shortened to shorten the conveying distance. In this way, a wide tubular continuous film 1 can be unwound, and a narrow tubular continuous film 1 can be unwound in a short period of time. In the above description, intermediate transport rollers 28b are provided, but tubular continuous film 1 can be transported without intermediate transport rollers 28b.

[0045] The conveying section 30 further spreads the film 5 (hereinafter referred to as film 5) of the upper film 3 conveyed from the supply section 20, in which one widthwise side portion 3a and the other widthwise side portion 3b are spread out, while conveying it, so that the lower film 4 and the one widthwise side portion 3a and the other widthwise side portion 3b are spread out into a single film, and the film is made into a wrinkle-free single-row continuous film 6, which is then conveyed toward the post-processing section 40. The configuration of the transfer section will be described with reference to Fig. 6 to Fig. 8. Fig. 6 is a top view of the transfer section, Fig. 7 is a top view of the transfer conveyor, and Fig. 8 is a side view of the transfer conveyor. As shown in FIG. 6, the transport section 30 is equipped with a transport conveyor device 31 having the function of adsorbing and transporting the film, and the transport surface 31a of the transport conveyor device 31 is located above the lower transport rollers 28c of the supply section 20 as shown in FIG. 3.

[0046] The transport conveyor device 31 has an upstream portion 31b in the transport direction that is narrowest in width, an intermediate portion 31c in the transport direction that is intermediate in width, and a downstream portion 31d in the transport direction that is widest and has a width equal to or slightly wider than the width of the single-row continuous film 6, and the widthwise centers of the portions 31b, 31c, and 31d are continuous in a straight line. In other words, the width is gradually increased from the upstream side to the downstream side in the transport direction. The widthwise center of the transport conveyor device 31 is continuous in a straight line with the widthwise center of the buffer section 25. The width of the transport conveyor device 31 may be gradually increased from the upstream side to the downstream side in the transport direction. For this reason, the conveying conveyor device 31 first conveys the narrow portion of the widthwise center of the film 5 conveyed from the lower conveying roller 28c, then gradually conveys the wider portion of the widthwise center, and finally conveys the entire width of the single-row continuous film 6.

[0047] Since the conveying surface 31a of the conveying conveyor device 31 is located above the lower conveying rollers 28c of the supply section 20, the film 5 conveyed from the lower conveying rollers 28c has both widthwise ends (one widthwise side portion 3a and the other widthwise side portion 3b of the upper film 3) sagging under their own weight as shown in Figure 3 and coming into contact with the installation surface 8 of the unwinding machine 10, and is conveyed toward the conveying conveyor 31 with the widthwise central portion away from the installation surface 8 and facing diagonally upward. Then, the widthwise central portion of the film 5 is first conveyed onto the conveying surface 31a of the transport conveyor device 31, and both widthwise sides are successively conveyed onto the conveying surface 31a of the transport conveyor device 31 as they are conveyed downstream in the conveying direction.

[0048] Therefore, a supply-side guide section 32 is attached to the upstream end of the transport conveyor device 31 in the transport direction (the end facing the supply section 20), and an antistatic mat or sheet, etc., is optionally installed on the portion of the installation surface 8 of the unwinding machine 10 with which the film 5 comes into contact, to prevent damage to the film 5 and to prevent static electricity from being generated. Furthermore, in order to reduce the contact resistance between the film 5 and the antistatic mat or sheet, etc., an air blowing mechanism may be provided that blows air from the upstream side to the downstream side or from the downstream side to the upstream side along the transport direction of the film 5. The supply-side guide section 32 has a belt conveyor (not shown) attached to a guide section frame 32a, and is installed so that the conveying surface of the belt conveyor faces diagonally downward toward the supply section 20. As shown in FIG. 3, the central portion of the film 5 in the width direction is transported by the belt conveyor of the supply-side guide section 32 to the conveying surface 31a of the transport conveyor device 31.

[0049] In this manner, the central portion in the width direction of film 5 can be smoothly transported to upstream portion 31b of transport conveyor device 31 in the transport direction. The attachment angle of the supply-side guide portion 32 (angle of the belt conveyor) is the same as the angle of a straight line connecting the lower conveying roller 28c and the upstream end of the conveying surface 31a of the transfer conveyor device 31 in the conveying direction. Since the angle of the straight line changes depending on the distance from the lower transport roller 28c to the transport conveyor device 31, the mounting angle of the supply side guide portion 32 is made adjustable. For example, the guide frame 32a is attached to the upstream end of the transport surface 31a of the transport conveyor device 31 in the transport direction so as to be swingable up and down and fixed at any angle. Supply-side guide section 32 may have a guide surface rather than a belt conveyor, and film 5 may move along the guide surface to conveying surface 31 a of transport conveyor device 31 .

[0050] The widthwise central portion of the film 5 is smoothly transported by the supply side guide portion 32 to the widthwise central portion of the transport surface 31a of the transport conveyor device 31 (the transport surface 31a at the upstream portion 31b in the transport direction of the transport conveyor device 31). However, the portions of the film 5 closer to one widthwise side and the other widthwise side than the supply side guide portion 32 are in a drooping state due to their own weight, and as the film 5 is transported, it is sequentially lifted up by the one widthwise side portion and the other widthwise side portion of the transport surface 31a of the transport conveyor device 31. As a result, the film 5 may get caught on corners of the transport conveyor device 31, preventing it from being transported smoothly. Therefore, a one-side guide 33 in the width direction is attached along one side in the width direction of the conveying conveyor device 31 across the upstream end on one side in the width direction of the upstream side portion 31b in the conveying direction and the upstream end on one side in the width direction of the downstream side portion 31d in the conveying direction, and a guide 34 on the other side in the width direction is attached along the other side in the width direction of the conveying conveyor device 31 across the upstream end on the other side in the width direction of the upstream side portion 31b in the conveying direction and the upstream end on the other side in the width direction of the downstream side portion 31d in the conveying direction.

[0051] The one-side guide 33 in the width direction is inclined in the conveying direction with respect to being parallel to the conveying direction such that the upstream end in the conveying direction is closer to the center in the width direction and the downstream end in the conveying direction is closer to one side in the width direction, and its upper surface is arc-shaped and at the same height as the conveying surface 31a of the conveying conveyor device 31. The guide 34 on the other side in the width direction is inclined in the conveying direction with respect to being parallel to the conveying direction such that the upstream end in the conveying direction is closer to the center in the width direction and the downstream end in the conveying direction is closer to the other side in the width direction, and its upper surface is arc-shaped and at the same height as the conveying surface 31a of the conveying conveyor device 31. As a result, the interval between the upstream sides in the conveying direction of the one-side guide 33 in the width direction and the guide 34 on the other side in the width direction is narrow, and the interval between the downstream sides in the width direction is wide, and they are arranged in a V shape that widens toward the downstream side in the conveying direction.

[0052] As a result, the one-side guide 33 in the width direction and the guide 34 on the other side in the width direction surround both sides in the width direction of the upstream side portion 31b and the intermediate portion 31c in the conveying direction of the conveying conveyor device 31, and constitute a V-shaped guide (33, 34) whose upper surface shape widens toward the downstream side in the conveying direction. The interval between the downstream sides in the conveying direction of the one-side guide 33 in the width direction and the guide 34 on the other side in the width direction is the same as or wider than the width when the single-row continuous film 6 is in the unwound state, and the V-shaped guide (33, 34) is configured to be able to guide the entire width of the single-row continuous film 6. As a result, even for a film used for a large agricultural vinyl house that has a wide width when unwound, it can be unwound into the state of the single-row continuous film 6 without generating wrinkles due to friction with the guide during conveyance.

[0053] There are gaps between the widthwise one side guide 33 and one widthwise side of the upstream portion 31b of the transport conveyor device 31 in the transport direction, and between one widthwise side of the intermediate portion 31c in the transport direction, and therefore the portion of the spread film 5 closer to the one widthwise side than the supply side guide portion 32 may not be able to move smoothly from the widthwise one side guide 33 to the transport surface 31a of the transport conveyor device 31. Therefore, a widthwise one side guide plate 35 is provided in between to enable smooth movement. There are gaps between the other width direction guide 34 and the other width direction side surface of the upstream portion 31b of the transport conveyor device 31 in the transport direction and between the other width direction side surface of the intermediate portion 31c in the transport direction, and it is possible that the portion of the spread film 5 closer to the other width direction than the supply side guide portion 32 cannot move smoothly from the other width direction guide 34 to the transport surface 31a of the transport conveyor device 31. Therefore, an other width direction guide plate 36 is provided in that gap to enable smooth movement.

[0054] As a result, the portion of the film 5 closer to one width side than the supply side guide portion 32 and the portion closer to the other width side are smoothly transported in sequence along the width side guide 33 and the width side guide 34 to the transport surface 31a of the transport conveyor device 31 as the film 5 is transported, and since the portion of the film 5 closer to one width side than the supply side guide portion 32 and the portion closer to the other width side hang down under their own weight and are in a straight line from top to bottom, they are smoothly transported to the transport surface 31a of the transport conveyor device 31. In addition, the one width direction guide 33 and the other width direction guide 34 are arranged diagonally so that they form a V shape that is narrower on the upstream side of the transport direction and wider on the downstream side of the transport direction, and thus the portion of the film 5 closer to one width direction and the portion closer to the other width direction than the supply side guide portion 32 move along both guides 33, 34 to the transport surface 31a, and as a result, the film 5 is subjected to a pulling force toward one width direction and a pulling force toward the other width direction. As a result, the expanded film 5 is transported while being pulled toward both width directions, which prevents wrinkles from occurring and ensures stable transport. Moreover, the portion of the expanded film 5 closer to one width direction side than the supply side guide part 32 and the portion closer to the other width direction side are transported along both guides 33, 34, so that the film can be transported straight without bending in the width direction.

[0055] The width-direction one-side guide 33 and the width-direction other-side guide 34 have a plurality of air suction ports (not shown) formed at regular intervals in the longitudinal direction. These air suction ports are connected to an air suction source (not shown) so that air is sucked in through the air suction ports, which attracts the film 5 moving along each of the guides 33, 34 to the transport surface 31a of the transport conveyor device 31, increasing the resistance to movement along each of the guides 33, 34 and strengthening the pulling force toward both sides in the width direction, thereby better preventing the occurrence of wrinkles and enabling more stable transport. A width-direction one-side conveying section pressing roller 37 and a width-direction other-side conveying section pressing roller 38 are provided on a downstream side portion 31d in the conveying direction of the conveyor device 31. The width-direction one-side conveying section pressing roller 37 has a plurality of rollers 37b attached to a rotating shaft 37a that is obliquely arranged so that one width-direction side end is upstream in the conveying direction from the other width-direction side end, and the rollers 37b are arranged so as to be pressed against the conveying surface 31a of the downstream side portion 31d in the conveying direction. By rotating the rotating shaft 37a by a drive device not shown, a conveying force in the conveying direction and a pulling force in one direction in the width direction act on the single-line continuous film 6 being conveyed in the downstream side portion 31d in the conveying direction.

[0056] The widthwise other-side conveying section pressing roller 38 has a plurality of rollers 38b attached to a rotating shaft 38a that is obliquely arranged so that one widthwise side end is downstream in the conveying direction from the other widthwise side end, and the rollers 38b are arranged so as to be pressed against the conveying surface 31a of the downstream side portion 31d in the conveying direction. By rotating the rotating shaft 38a by a drive device not shown, a conveying force in the conveying direction and a pulling force in the other width direction act on the single-row continuous film 6 being conveyed in the downstream side portion 31d in the conveying direction. That is, the width-direction one-side conveying section pressing roller 37 and the width-direction other-side conveying section pressing roller 38 are arranged in a V-shaped configuration that spreads toward the upstream side in the conveying direction, and constitute members that apply tensile forces toward both sides in the width direction while conveying the single-row continuous film 6. As a result, the single-row continuous film 6 being conveyed at the downstream section 31d in the conveying direction of the conveying conveyor device 31 is pulled toward both sides in the width direction, and a single-row continuous film 6 without wrinkles can be obtained. Further, a driving device may not be provided on the rotating shafts 37a and 38a, and the rollers 37b and 38b may be configured to rotate following the conveyance of the single-row continuous film 6. Also in this case, a tensile force toward one side in the width direction acts on the single-row continuous film 6 by the roller 37b, and a tensile force toward the other side in the width direction acts on the single-row continuous film 6 by the roller 38b.

[0057] Thus, the unwinding machine 10 of the present invention forms the cylindrical continuous film 1 cut along the conveying direction into the film 5 spread by blowing air, and while conveying the spread film 5, pulls it toward both sides in the width direction to make it wrinkle-free, so that it is configured to unwind into the state of the single-row continuous film 6. Therefore, there is no limitation on the width of the single-row continuous film 6 that can be unwound, and a film with a width of 4500 mm or more used for a large agricultural vinyl house can be unwound. That is, by providing the conveying conveyor device 31 capable of sucking and conveying the spread film 5 so as to be able to guide the entire width of the spread film 5 to be unwound, even a film used for a large agricultural vinyl house with a wide width when unwound can be stably conveyed and unwound into the state of a single-row continuous film 6 without wrinkles.

[0058] In the embodiment, the tubular continuous film 1 is an agricultural polyolefin film having a width of 2300 mm to 4600 mm (the width of the unwound single-row continuous film 6 is 4600 mm to 9200 mm), and the thicknesses of the agricultural polyolefin films are 0.05 mm, 0.075 mm, 0.1 mm, 0.13 mm, and 0.15 mm, but as described above, even films used in large agricultural vinyl greenhouses can be transported stably and unwound without generating wrinkles. In the embodiment, the maximum conveying speed is 24 m / min (varies depending on conditions).

[0059] Next, the configuration of the transport conveyor device 31 will be described. In the embodiment, the conveying conveyor device 31 has one conveying conveyor 39 to form the upstream side portion 31b in the conveying direction, two conveying conveyors 39 lined up in the width direction to form the first conveying direction intermediate portion 31c-1, two conveying conveyors 39 lined up in the width direction with auxiliary conveying conveyors 39a lined up on both sides to form the second conveying direction intermediate portion 31c-2, and six conveying conveyors 39 lined up in the width direction to form the downstream side portion 31d in the conveying direction. By configuring the transport conveyor device 31 in this manner, a transport conveyor device 31 capable of transporting a wide film can be configured by arranging small, short, narrow transport conveyors 39, 39a, and the transport conveyor device 31 can be manufactured simply and at low cost. The transport conveyor 39 has a function of adsorbing and transporting the film 5 . The V-shaped guides (33, 34) and the transport conveyor 39 are positioned so as to guide the entire width when the film is unwound into a single, single-row continuous film 6. The number of transport conveyors 39 is not limited to that in the embodiment, and the number of transport conveyors 39 may be changed as desired by changing the length and width (size) of the transport conveyors 39.

[0060] The configuration of the transport conveyor 39 will be described with reference to FIGS. The transport conveyor 39 has upstream rollers 71 and downstream rollers 72 provided on a conveyor frame 70, and two suction transport belts 73 and three transport belts 74 are alternately stretched across the upstream rollers 71 and downstream rollers 72 in the width direction. In this embodiment, one transport belt 74 is stretched across the center in the width direction, and suction transport belts 73 are stretched across both sides of the transport belt 74 in the width direction, and one transport belt 74 is stretched across the outer side of each suction transport belt 73 in the width direction. A driving device (not shown) is provided on one of the upstream roller 71 of the transport conveyor and the downstream roller 72 of the transport conveyor, and the rollers are rotated by the driving device.

[0061] The suction conveyor belt 73 is a belt member having suction holes 73a opened at regular intervals, and the conveyor belt 74 is a normal belt member having no suction holes 73a. Suction boxes 75 are provided continuously in the conveying direction between the upper and lower belts of the suction conveyor belt 73, and the suction boxes 75 have slit-shaped holes 75a formed therein for sucking air from the suction holes 73a of the suction conveyor belt 73, and are connected to air piping 76. The air piping 76 is connected to a blower 77, and by driving the blower 77 to suck air, air is sucked through the suction holes 73a via the air piping 76 and the slit-shaped holes 75a of the suction box 75, causing the suction conveyor belt 73 to suck the film 5. In other words, the suction box 75, air piping 76, and blower 77 constitute a suction mechanism.

[0062] The suction conveying belt 73 of the conveying conveyor 39 constituting the first conveying direction intermediate portion 31c-1 and the suction conveying belt 73 of the conveying conveyor 39 constituting the second conveying direction intermediate portion 31c-2 are continuous, and the suction conveying belt 73 is continuous with the suction conveying belt 73 of the conveying conveyor 39 constituting the conveying direction downstream portion 31d. That is, the conveying conveyor device 31 has a suction conveying belt 73 at the center of the width direction on the upstream side of the conveying direction, a suction conveying belt 73 at the middle of the width direction in the middle of the conveying direction, and a plurality of suction conveying belts 73 spaced apart in the width direction on the downstream side of the conveying direction. As a result, the transport conveyor device 31 sucks and transports the center of the width direction of the film 5 that spreads from the upstream to the downstream in the transport direction, and sucks and transports the entire width direction on the downstream side in the transport direction.

[0063] As a result, the transport conveyor device 31 sucks up and transports the widthwise central portion of the film 5 transported by the supply side guide portion 32 upstream in the transport direction, and sucks up and transports the middle portions on both sides in the width direction in the middle of the transport direction, making it easier for the film 5 to move toward the transport surface 31a nearer both sides in the width direction than the supply side guide portion 32, using the V-shaped guides (33, 34) as guides, and downstream in the transport direction, the entire widthwise area is sucked up and transported to create a wrinkle-free state. Although all of the suction conveyor belts 73 may be configured to suck the spread film 5, the configuration may be modified so that only any of the suction conveyor belts 73 is used to suck the film 5. Furthermore, the transport conveyors 39 constituting the transport conveyor device 31 may include an auxiliary transport conveyor 39 a that does not have the suction transport belt 73 . That is, since the portion to be suctioned and transported may differ depending on the material, width, thickness, etc. of the film 5 to be transported, the position of the suction transport belt 73 is changed depending on the portion to be suctioned and transported.

[0064] In addition, the drive device connected to either the upstream conveyor roller 71 or the downstream conveyor roller 72 of the multiple conveyor conveyors 39 that make up the conveyor device 31 can be controlled independently for each conveyor 39. Therefore, by partially changing the conveying speed depending on the material, width, thickness, etc. of the film 5 being conveyed, the tension generated in the film 5 can be adjusted, and the film can be kept wrinkle-free. In addition, the drive of the transport conveyor 39 may be controlled in conjunction with the supply section transport device 24 of the supply section 20, the air blowing device 50, and the post-processing section transport device 42 described later, to adjust the tension generated in the film 5, etc. In addition, when there is a transport conveyor 39 that does not transport the film 5 that has expanded according to the width of the film 5 being transported, the transport conveyor 39 that is not transporting the film 5 can be prevented from being driven, thereby extending the life of the transport conveyor 39 and reducing power consumption. Also, the drive of the transport conveyor 39 in the width direction may be linked to reduce the cost of control and drive device. The driving device (not shown) of each transport conveyor 39 may have a function of stopping when an overload is detected. When the driving device (not shown) of each transport conveyor 39 stops, the entire unwinding machine 10 may be stopped.

[0065] The blowers 77 of the transport conveyors 39 can be controlled independently for each transport conveyor 39, so that the tension generated in the film 5 can be adjusted by partially changing the amount of suction depending on the material, width, thickness, etc. of the spread film 5 being transported. Blower 77 may be controlled in conjunction with supply section transport device 24, air blowing device 50, and post-processing section transport device 42 to adjust the tension generated in film 5, etc. Furthermore, by stopping the unused blowers 77 depending on the width of the film 5 being transported, the life of the blowers 77 can be extended and power consumption can be reduced.

[0066] As shown in Figure 6, an intermediate guide section 78 can be provided between adjacent conveying conveyors 39 in the conveying direction, for example, between the conveying conveyor 39 constituting the upstream side portion 31b in the conveying direction and the conveying conveyor 39 constituting the first conveying direction intermediate portion 31c-1, and a downstream guide section 79 can be provided on the post-processing section 40 side of the conveying conveyor 39 constituting the downstream side portion 31d in the conveying direction. The intermediate guide section 78 and the downstream guide section 79 are equipped with conveyor belts (not shown) similar to the supply side guide section 32 described above, and the intermediate guide section 78 transports the film 5 downstream, while the downstream guide section 79 transports the single-row continuous film 6 downstream. By providing the intermediate guide portion 78 and the downstream guide portion 79, the overall length of the conveying conveyor device 31 can be changed without changing the length of the conveying conveyor 39, and the intermediate guide portion 78 and the downstream guide portion 79 are provided to adjust the spacing at which the conveying conveyor devices 31 are positioned.

[0067] By configuring the intermediate guide portion 78 and the downstream guide portion 79 so that they can move downward relative to the transfer surface 31a of the transfer conveyor device 31, it is possible to ensure space for maintenance of each portion. The drive of the belt conveyors of the supply side guide section 32, the intermediate guide section 78, and the downstream side guide section 79 may be linked to the drive of the suction conveying belts 73 and conveying belts 74 of the conveying conveyor 39 that constitutes the conveying conveyor device 31, or may be controlled by providing an independent driving device.

[0068] The configuration of the post-processing section will be described with reference to Figures 9 and 10. Figure 9 is a side view of the post-processing section, and Figure 10 is a front view of the post-processing section as viewed from the downstream side in the transport direction. In the embodiment, the post-processing section 40 is a folding device that folds the single-line continuous film 6 in an accordion-like shape. The post-processing section 40 is not limited to a folding device, and may be any device such as a delivery device that transports the single-line continuous film 6 to another device. The post-processing section 40 is equipped with a post-processing section conveying device 42, the previously mentioned post-processing section width-direction cutter 41, and a swivel device 43, and folds the single-row continuous film 6 that has been unwound and conveyed in the conveying section 30, and cuts it widthwise by the post-processing section width-direction cutter 41 according to an arbitrary conveying distance, thereby producing a product 7 that is folded multiple times into an accordion-like shape. The post-processing section transport device 42 is located upstream of the post-processing section width-direction cutter 41 in the transport direction, and transports the single-row continuous film 6 transported from the transport section 30 toward the post-processing section width-direction cutter 41. The post-processing section conveying device 42 is composed of a post-processing section drive roller 44 which is rotated by a drive device not shown, and a post-processing section nip roller 45 which is provided above the post-processing section drive roller 44 and nips the single-row continuous film 6 between the post-processing section drive roller 44.

[0069] The post-processing section drive roller 44 is a long roller that is continuous in the width direction of the single-row continuous film 6, and the post-processing section nip rollers 45 are short rollers that are shorter than the width of the single-row continuous film 6 and are arranged at intervals in the width direction. The position of the post-treatment section nip roller 45 is controlled so that, depending on the operating conditions of the unwinding machine 10, it is located at a nip position where it nips the single-row continuous film 6 with the post-treatment section drive roller 44, and at a non-nip position where it is separated from the post-treatment section drive roller 44 and does not nip the single-row continuous film 6.

[0070] An example of control of the post-processing nip rollers 45 will be described. The post-processing nip rollers 45 to be in the nip position are selected according to the width of the single-row continuous film 6. For example, the post-processing nip rollers 45 located within the width of the single-row continuous film 6 are in the nip position, and the post-processing nip rollers 45 located outside the width are in the non-nip position. This operation can be performed automatically according to the width. Furthermore, when the single single-line continuous film 6 is transported, the post-processing nip roller 45 is set to the nip position, and when the single single-line continuous film 6 is no longer on the post-processing drive roller 44 (when transport is completed), the post-processing nip roller 45 is set to a non-nip position separated from the post-processing drive roller 44. In this manner, it is easy to set the single single-line continuous film 6 in the post-processing transport device 42 when transport of the single single-line continuous film 6 is resumed.

[0071] By performing this operation automatically, the operation becomes easier and the workability is improved. For example, when a single-row continuous film 6 is transported, the post-treatment process nip rollers 45 automatically move to the nip position, and when the trailing end of the single-row continuous film 6 in the transport direction passes through the post-treatment process conveying device 42 and is no longer on the post-treatment process drive roller 44, the post-treatment process nip rollers 45 automatically move to the non-nip position, making it possible for the next single-row continuous film 6 to be transported to be set in the post-treatment process conveying device 42. In this way, the workability in unrolling the tubular continuous film 1 is improved. The configuration of the post-treatment section width-direction cutter 41 and the control regarding cutting in the width direction will be described in detail later.

[0072] The swivel device 43 is composed of a swivel device upstream roller 46 arranged across the width of the post-processing frame 40a, a plate member 47 which serves as the swivel device conveying surface and which oscillates up and down around the swivel device upstream roller 46 as a fulcrum, a swivel device downstream roller 48 arranged at the tip of the plate member 47, and a swivel device belt 49 stretched between the two rollers 46, 48, and the swivel device belt 49 oscillates up and down around the swivel device upstream roller 46 as a fulcrum. The single-line continuous film 6 is transported downstream (downward) in the transport direction by the oscillating belt 49, and is folded in an accordion shape by the up and down oscillation of the oscillating belt 49 and discharged. The single-row continuous film 6 is cut to an arbitrary length by a width direction cutter 41 in the post-treatment section according to the conveying amount. The product 7 that has been cut to a desired length by the post-processing section 40 and folded into an accordion-like shape is used in agricultural vinyl greenhouses, etc.

[0073] The configuration of the post-treatment section width-direction cutter will be described with reference to Fig. 11. Fig. 11 is a front view of the post-treatment section width-direction cutter. As shown in Figure 11, the post-treatment section width-wise cutter 41 moves the cutter section 80 across the width of the single-row continuous film 6 to cut it in the width direction, and the single-row continuous film 6 cut in the width direction is separated into an upstream portion 6a held on the conveying section 30 side and a downstream portion 6b cut off on the post-treatment section 40 side. The cutter unit 80 has an upper rotary blade 80a and a lower rotary blade 80b provided on a cutter unit holding unit 81, and while the upper rotary blade 80a and the lower rotary blade 80b rotate in opposite directions as shown by the arrows, the cutter unit holding unit 81 is moved in the direction of arrow H by a cutter unit moving device 82 to continuously cut the single-row continuous film 6 widthwise.

[0074] The cutter portion moving device 82 includes a moving member 83 and a belt member 84 , and the cutter portion holding portion 81 is attached to the moving member 83 . As shown in Figure 10, the belt member 84 is configured so that a belt 84c is stretched between one side roller 84a, which is located outside the post-processing drive roller 44 on one side of the post-processing frame 40a in the width direction (outside one widthwise end of the single-row continuous film 6), and the other side roller 84b, which is located outside the post-processing drive roller 44 on the other width direction (outside the other widthwise end of the single-row continuous film 6), and the belt 84c is rotated by driving either one of the rollers with a drive device. The movable member 83 is provided with a number of rollers 83a, a lower member 83b for fixing the belt, and an upper member 83c for fixing the belt. A belt 84c is hung on each roller 83a. The belt 84c is clamped between the lower member 83b for fixing the belt and the upper member 83c for fixing the belt, and as the belt 84c rotates, the movable member 83 moves in the width direction along a guide not shown.

[0075] For this reason, when cutting begins, the belt 84c is rotated in one direction (clockwise in Figure 10) to move the cutter section 80 together with the movable member 83 in the direction of arrow H from the other side of the width direction to one side, thereby cutting the single single-row continuous film 6 widthwise and moving to the cutting end position on one side of the width direction. After the cutting is completed, the belt 84c is rotated in the other direction (counterclockwise in Figure 10) to move the cutter unit 80 together with the movable member 83 in the direction of arrow I from one side in the width direction to the other side in the width direction, and moves to a standby position on the other side in the width direction, where it waits for the next cutting operation. As a result, when the single-row continuous film 6 is not being cut, the post-processing section width-direction cutter 41 is positioned widthwise outside the single-row continuous film 6 and does not interfere with transport.

[0076] As shown in Fig. 10, an other-side sensor 85 is provided on the other widthwise side of the post-processing section frame 40a. The other-side sensor 85 detects the moving member 83 (cutter section 80) when the operation of the unwinding machine 10 is started, and determines a reference position (origin) for controlling the movement of the moving member 83. In FIG. 10, the belt member 84 and the moving member 83 are shown, but the other members are not shown. Based on the position detected by the other side sensor 85, the post-processing section width direction cutter 41 can be automatically controlled.

[0077] For example, the position of the cutter unit 80 is confirmed by detection by the other side sensor 85 . When it is time to start cutting, the belt 84c is rotated in one direction to move the cutter unit 80 together with the moving member 83 toward one side in the width direction, thereby cutting the single single-line continuous film 6 in the width direction. The amount of movement of the cutter unit 80 in the width direction is controlled by a drive device (not shown) provided on either one of the one-side roller 84a or the other-side roller 84b. A known servo motor or the like can be used as the drive device (not shown). After the single-row continuous film 6 is cut in the width direction, the belt 84c is stopped and rotated in the other direction to move the cutter unit 80 together with the moving member 83 to the other side in the width direction, and the belt 84c is stopped and the cutter unit 80 waits at the standby position. The standby position can be controlled so as to shorten the distance that the cutter unit 80 reciprocates, depending on the width of the single-line continuous film 6. For example, when the width of the single-line continuous film 6 is narrow, the standby position can be set to a position close to the center in the width direction within a range that does not interfere with the transport of the single-line continuous film 6. The standby position and reciprocating distance of the cutter unit 80 are automatically controlled by a sensor (not shown) detecting the width of the single-row continuous film 6. This eliminates the need for the user to make settings according to the width of the single-row continuous film 6, improving operability and preventing operational errors. With this configuration, the reciprocating distance of the cutter unit 80 is minimized, so that wear on the cutter unit 80 and the belt 84c is suppressed, energy is saved, and the time required for cutting is shortened, thereby improving productivity. Instead of the other-side sensor 85, a one-side sensor 86 may be provided on one widthwise side of the post-processing section frame 40a, and the standby position of the cutter section 80 may be the side on which the one-side sensor 86 is provided. The one-side sensor 86, like the other-side sensor 85, detects the moving member 83 when the operation of the unwinding machine 10 is started, and determines a reference position for controlling the movement of the moving member 83. In this case, the direction of the cutter unit 80 is set to the cutting direction (arrow I direction) when it moves from the left side to the right side of the paper in FIG.

[0078] In this embodiment, the cutter unit 80 uses an upper rotary blade 80a and a lower rotary blade 80b, but the present invention is not limited to this and any configuration that can cut a film can be used. The cutting of the single-line continuous film 6 in the width direction is performed while the transport of the single-line continuous film 6 is stopped, and the transport is resumed after the cutting. The driving device (not shown) that rotates the belt 84c may have a function of stopping when an overload is detected. When the driving device stops, the operation of the entire unwinding machine 10 may be stopped.

[0079] The supply section width-direction cutter 23 has the same configuration as the post-processing section width-direction cutter 41, and the belt member 84 is attached to the supply section frame 20a in the same manner as the post-processing section width-direction cutter 41. However, in order to improve workability by having the standby positions on the same side, a one-side sensor 86 is provided on one widthwise side of the supply section frame 20a, and as described above, the standby position of the cutter section 80 is the side on which the one-side sensor 86 is provided. The cutter section 80 moves in the width direction of the tubular continuous film 1 to continuously cut it in the width direction, separating the tubular continuous film 1 into an upstream portion that is continuous with the roll body 2 and a downstream portion that is transported by the supply section transport device 24.

[0080] The configuration of the conveying direction cutter will be described with reference to Figures 12 and 13. Figure 12 is a front view of the conveying direction cutter, and Figure 13 is an enlarged side view of the cutter portion. As shown in Figure 12, the conveying direction cutter 21 is equipped with a center cutter portion 21a that cuts the widthwise center of the flattened tubular continuous film 1 along the conveying direction, an other side cutter portion 21b that cuts the other widthwise side of the flattened tubular continuous film 1 along the conveying direction, and a one side cutter portion 21c that cuts one widthwise side of the flattened tubular continuous film 1 along the conveying direction, and cuts one location in the widthwise center with the center cutter portion 21a, or simultaneously cuts two locations, the other widthwise side and one widthwise side, using the other side cutter portion 21b and the one side cutter portion 21c.

[0081] The center cutter portion 21a, the other side cutter portion 21b and the one side cutter portion 21c are attached to a cutter mounting frame 90, which is provided on the supply section frame 20a shown in Figure 4, and the conveying direction cutter 21 is provided in the center of the supply section 20 in the width direction. The cutter mounting frame 90 has a cross member 90a extending in the width direction, a one-side plate 90c arranged vertically near one side of the cross member 90a in the width direction, and an other-side plate 90b arranged vertically near the other side of the cross member 90a in the width direction. An adjustment shaft 91 is rotatably provided across the one-side plate 90c and the other-side plate 90b, and a pair of cutter section mounting bars 92 are provided above and below.

[0082] The center cutter unit 21a has a cutter blade 94 for cutting the cylindrical continuous film 1, a backing plate 95, and a presser member 96 attached to a first cutter unit mounting member 93, and the first cutter unit mounting member 93 is attached to a second cutter unit mounting member 97 so that its vertical position can be adjusted. For example, a vertical elongated hole 93a is formed in the first cutter unit mounting member 93, and a lock bolt 93b is screwed into the second cutter unit mounting member 97 from the elongated hole 93a, thereby making the vertical position adjustable. The cutter blade 94 is mounted on the first cutter unit mounting member 93 so that the cutting edge 94a faces downward and vertically toward the tubular continuous film 1, and is slidable up and down in an oblique position toward the transport direction so that the cutting edge 94a is downstream in the transport direction, and the position of the cutting edge 94a can be adjusted up and down.

[0083] For example, the cutter blade 94 can be locked so as not to slide by rotating the cutter blade fixing lever 97a in a tightening direction, and the cutter blade 94 can be allowed to slide by rotating the cutter blade fixing lever 97a in a loosening direction, making it possible to adjust the position of the cutting edge 94a. The backing plate 95 prevents the cutter blade 94 from cutting the lower film 4 of the tubular continuous film 1, and is attached to the lower part of the first cutter unit mounting member 93 with its pointed tip facing upstream in the transport direction so that the backing plate 95 can easily enter between the top surface of the lower film 4 and the bottom surface of the upper film 3 of the flat tubular continuous film 1 being transported, as shown in Figure 13. A groove (not shown) facing the transport direction is formed on the top surface of the backing plate 95, into which the cutting edge 94a of the cutter blade 94 fits.

[0084] As a result, the cutting edge 94a of the cutter blade 94 penetrates the upper film 3 of the tubular continuous film 1 and fits into the groove of the backing plate 95, thereby reliably cutting the upper film 3. Moreover, because the cutting edge 94a of the cutter blade 94 does not protrude below the backing plate 95, it does not cut the lower film 4. The pressure member 96 suppresses fluttering of one widthwise side portion 3a and the other widthwise side portion 3b of the cut upper film 3 of the tubular continuous film 1 when the upper film 3 of the tubular continuous film 1 is cut by the cutter blade 94. The pressure member 96 is plate-shaped and positioned above the backing plate 95, and a slit (not shown) is formed in the downstream portion of the pressure member 96 in the conveying direction through which the cutting edge 94a of the cutter blade 94 passes.

[0085] The second cutter mounting member 97 of the center cutter portion 21a is attached to the pair of upper and lower cutter mounting bars 92 so as not to move in the axial direction. For example, the upper surface of the upper portion of the second cutter mounting member 97 of the center cutter portion 21a is not in contact with the adjustment shaft 91, and a slit 97c is provided from the upper surface of the upper portion to a hole into which the upper cutter mounting bar 92 fits, and the upper portion separated by the slit 97c is fastened with a fixing lever (not shown) to be fastened to the upper cutter mounting bar 92, thereby being attached so as not to move in the axial direction. The one-side cutter portion 21c and the other-side cutter portion 21b have the same configuration as the center cutter portion 21a, and therefore the same reference numerals are used and detailed description thereof will be omitted. The second cutter attachment members 97 of the one-side cutter portion 21c and the other-side cutter portion 21b are attached along the cutter attachment bar 92 so as to be movable in the width direction.

[0086] The second cutter mounting member 97 of the one-side cutter unit 21c is attached to the adjustment shaft 91 so as to move toward the center in the width direction when the adjustment shaft 91 rotates in the forward direction and to move toward one side in the width direction when the adjustment shaft 91 rotates in the reverse direction. Furthermore, the second cutter mounting member 97 of the one-side cutter unit 21c is provided with a pair of upper and lower bearings 97b for smooth movement in the width direction, and the second cutter mounting member 97 of the one-side cutter unit 21c is supported by the pair of upper and lower cutter mounting bars 92 via the pair of upper and lower bearings 97b so as to be axially movable. The second cutter mounting member 97 of the other-side cutter unit 21b is attached to the adjustment shaft 91 so as to move toward the center in the width direction when the adjustment shaft 91 rotates in the forward direction and move toward the other side in the width direction when the adjustment shaft 91 rotates in the reverse direction. Furthermore, the second cutter mounting member 97 of the other-side cutter unit 21b is provided with a pair of upper and lower bearings 97b for smooth movement in the width direction, and the second cutter mounting member 97 of the other-side cutter unit 21b is supported by the pair of upper and lower cutter mounting bars 92 via the pair of upper and lower bearings 97b so as to be axially movable. For example, a right-handed thread (not shown) is formed on one longitudinal end of the adjustment shaft 91, and a left-handed thread (not shown) is formed on the other longitudinal end. A nut member 98 that screws into the right-handed thread is provided on the second cutter portion mounting member 97 of one cutter portion 21c so as to prevent it from rotating, and a nut member 99 that screws into the left-handed thread is provided on the second cutter portion mounting member 97 of the other cutter portion 21b so as to prevent it from rotating.

[0087] As a result, when the adjustment shaft 91 is rotated in the forward direction by the adjustment mechanism 100, the one-side cutter portion 21c and the other-side cutter portion 21b move closer to each other toward the center in the width direction, narrowing the gap in the width direction, and when the adjustment shaft 91 is rotated in the reverse direction by the adjustment mechanism 100, the one-side cutter portion 21c and the other-side cutter portion 21b move apart toward both sides in the width direction, widening the gap in the width direction. The adjustment mechanism 100 is configured to rotate the adjustment shaft 91 by transmitting the rotation of the manually rotated handle 101 to the adjustment shaft 91 via gears, but it can also be configured to rotate the adjustment shaft 91 using a motor or the like. With this configuration, the positions of the one-side cutter portion 21c and the other-side cutter portion 21b can be automatically controlled by driving and controlling the motor with a control device not shown. In this case, the cutting width can be adjusted without stopping the conveyance of the tubular continuous film 1 in the supply unit 20. A nameplate 102 with a scale for checking the widthwise position of each cutter section 21a, 21b, 21c is provided widthwise on the cross member 90a of the cutter mounting frame 90, and a pointer 103 is attached to each cutter section 21a, 21b, 21c so that the widthwise position can be checked by the scale indicated by the pointer 103.

[0088] Next, the operation of continuously cutting the center of the width direction of the tubular continuous film 1 in the conveying direction by the conveying direction cutter 21 will be described. The first cutter attachment member 93 of the center cutter portion 21 a is moved downward so that the cutting edge 94 a of the cutter blade 94 fits into the groove of the backing plate 95 . The first cutting unit mounting members 93 of the one-side cutting unit 21c and the other-side cutting unit 21b are moved upward so that the cutting edge 94a of the cutter blade 94 is positioned above the tubular continuous film 1 being conveyed. By transporting the cylindrical continuous film 1 in this state, the center of the width of the upper film 3 can be continuously cut in the transport direction to separate it into one widthwise side portion 3a and the other widthwise side portion 3b.

[0089] Next, the operation of cutting two locations on both widthwise sides of tubular continuous film 1 continuously in the conveying direction by conveying direction cutter 21 will be described. The adjustment mechanism 100 is operated to move the one side cutter portion 21c and the other side cutter portion 21b closer to or farther apart in the width direction, thereby adjusting the widthwise positions so that cutting can be performed simultaneously at two locations in the width direction with a predetermined distance between them. The first cutter attachment members 93 of the one-side cutter portion 21 c and the other-side cutter portion 21 b are moved downward so that the cutting edges 94 a of the cutter blades 94 fit into the grooves of the backing plate 95 . The first cutting unit mounting member 93 of the center cutter unit 21a is moved upward so that the cutting edge 94a of the cutter blade 94 is positioned above the tubular continuous film 1 being conveyed. By transporting the tubular continuous film 1 in this state, two locations on both sides of the width direction of the upper film 3 are cut continuously in the transport direction, separating it into one width direction side portion 3a and the other width direction side portion 3b, while leaving an unnecessary width direction middle portion.

[0090] In this way, the configuration of the conveying direction cutter 21 can be switched between a configuration that cuts one place in the widthwise center of the conveyed tubular continuous film 1, and a configuration that cuts two places on both sides in the widthwise direction of the conveyed tubular continuous film 1, so that a tubular continuous film 1 of the same width can be separated into single single-row continuous films 6 of different widths.

[0091] In the unwinding machine 10 of the present invention, by using the supply section width direction cutter 23 and the post-processing section width direction cutter 41 in conjunction with each other as described below, no tubular continuous film 1 remains on the supply section 20, and no single-row continuous film 6 remains on the conveying section 30, preventing the occurrence of waste. Waste is a printing term and refers, for example, to substrate material (paper, film, etc.) that is wasted in the process of making something. The operation of using the width direction cutter 23 in the supply section and the width direction cutter 41 in the post-processing section in conjunction with each other will be described with reference to Fig. 14. Fig. 14 is a schematic diagram showing a case where a total of eight products are produced by the unwinding machine 10 of the present invention, including four products cut to a length of 3 m in the conveying direction and four products cut to a length of 4 m in the conveying direction.

[0092] Here, the distance in the conveying direction between the supply section width direction cutting position by the supply section width direction cutter 23 and the post-processing section width direction cutting position by the post-processing section width direction cutter 41 is 20 m. The conveying amount (conveyed distance) is calculated from the rotation amount of any roller in the supply section 20 and the post-processing section 40. Further, the cylindrical continuous film 1, the spread film 5, and the single, single-row continuous film 6 will not be differentiated from one another and will simply be referred to as films. In Figure 14, 201 indicates the first 3m product produced, 202 indicates the second 3m product produced, 203 indicates the third 3m product produced, 204 indicates the fourth 3m product produced, 205 indicates the first 4m product produced, 206 indicates the second 4m product produced, 207 indicates the third 4m product produced, and 208 indicates the fourth 4m product produced.

[0093] FIG. 14(a) shows the state in which cutting of the product can begin. In other words, the supply section drive roller 24a is rotated to transport the film to the post-processing section width-direction cutter 41. In this case, the transport amount is detected from the amount of rotation of the supply section drive roller 24a, and when a predetermined transport amount is reached, the supply section drive roller 24a is stopped. Alternatively, the film may be transported to the downstream side of post-processing section width-direction cutter 41, and an unnecessary portion of any length at the front of the transported film may be cut and removed by post-processing section width-direction cutter 41. Figure 14(b) shows a process for manufacturing the first product 201 cut to a length of 3 m in the conveying direction. In this case, the post-processing section width-direction cutter 41 operates in response to the conveying distance reaching 3 m from the state shown in Figure 14(a). For example, the conveying amount is detected from the rotation amount of the post-processing section drive roller 44 of the post-processing section conveying device 42, and when the detected conveying amount reaches 3 m, the post-processing section drive roller 44 and the supply section drive roller 24a are stopped, and the post-processing section width-direction cutter 41 is operated to perform cutting.

[0094] 14(c) shows a process for producing a second product 202 cut to a length of 3 m in the conveying direction. In this case, the post-processing width-direction cutter 41 operates in response to the fact that the conveying amount has become 3 m since the previous cut by the post-processing width-direction cutter 41. The conveying amount is detected in the same manner as above. (d) in Figure 14 shows a case where, after producing four 3 m products and four 4 m products (total of 28 m), cutting is performed by the supply section width direction cutter 23 when the total length of the remaining products to be produced reaches the distance (20 m) between the supply section width direction cutter 23 and the post-processing section width direction cutter 41, in order to prevent any film from remaining on the conveying section 30. In this case, the conveying amount is detected by the amount of rotation of the supply section drive roller 24a of the supply section conveying device 24, and when the conveying distance from the state shown in Figure 14(a) plus the length of the film already conveyed at the time of the state shown in Figure 14(a) (the length of the film between the supply section width direction cutting position and the post-processing section width direction cutting position) reaches 28 m, the supply section drive roller 24a and the post-processing section drive roller 44 are stopped and the supply section width direction cutter 23 is operated to perform cutting.

[0095] In other words, halfway through the transport for the manufacture of the third product 203 having a length of 3 m (at the point of transporting 2 m), the remaining total length of the products to be manufactured becomes 20 m, so cutting is performed by the supply section width direction cutter 23 at this timing. After cutting by the supply section width direction cutter 23, the supply section drive roller 24a and the post-processing section drive roller 44 rotate to transport the film, and the post-processing section width direction cutter 41 operates in response to the fact that the transport amount has reached 3 m since the previous cut by the post-processing section width direction cutter 41, to produce the third 3-meter-long product 203. The transport amount in this case is detected by the amount of rotation of the post-processing section drive roller 44 as described above. After being cut by the supply section width direction cutter 23, the film upstream of the supply section width direction cutter 23 is not transported.

[0096] 14(e) shows a process for producing a fourth product 204 cut to a length of 3 m in the conveying direction. In this case, the post-processing width-direction cutter 41 operates in response to the fact that the conveying amount has become 3 m since the previous cut by the post-processing width-direction cutter 41, and produces the fourth product 204 having a length of 3 m. The conveying amount in this case is detected by the amount of rotation of the post-processing drive roller 44. 14(f) shows a process for producing the fifth product 205 cut to a length of 4 m in the conveying direction. In this case, the post-processing width-direction cutter 41 operates in response to the fact that the conveying amount has become 4 m since the previous cut by the post-processing width-direction cutter 41, and produces the fifth product 205. The conveying amount in this case is detected by the amount of rotation of the post-processing drive roller 44.

[0097] 14(g) shows a process for producing the sixth product 206 cut to a length of 4 m in the conveying direction. In this case, the post-processing width-direction cutter 41 operates in response to the fact that the conveying amount has become 4 m since the previous cut by the post-processing width-direction cutter 41, and produces the sixth product 206. The conveying amount in this case is detected by the amount of rotation of the post-processing drive roller 44. 14(h) shows a process for producing the seventh product 207 cut to a length of 4 m in the conveying direction. In this case, the post-processing width-direction cutter 41 operates in response to the fact that the conveying amount has reached 4 m since the previous cut by the post-processing width-direction cutter 41, and produces the seventh product 207. The conveying amount in this case is detected by the amount of rotation of the post-processing drive roller 44. Shown in Fig. 14(i) is the process of manufacturing the eighth product 208 cut to a length of 4 m in the conveying direction. In this case, since the film is cut by the supply section width direction cutter 23 as shown in Fig. 14(d), there is no need to cut the last product, so the post-processing section width direction cutter 41 does not operate, and only the eighth product 208 is discharged by the rotation of the post-processing section drive roller 44.

[0098] In this manner, by cutting the last product 208 of the series of products produced in the process shown in (a) to (i) of Figure 14 with the supply section width direction cutter 23 during production, after all products have been produced, no film is left downstream of the supply section width direction cutter 23, and products of any length can be produced. In the past, films that remained on a roll-removing machine for a long time were disposed of as waste, but by controlling the use of the supply section width direction cutter 23 and the post-treatment section width direction cutter 41 in accordance with the present invention, it is possible to prevent the film from remaining on the supply section 20 and the conveying section 30 and causing waste. In particular, in the case of films used in large, wide agricultural vinyl greenhouses, the price per unit length is high, so preventing waste is very effective.

[0099] In the unwinding machine 10 of the present invention, slack occurs in the film during the process of transporting the film between the buffer section 25 and the supply-side guiding section 32 of the transport section 30. For this reason, in order to determine all the timings for cutting the continuously manufactured products by the supply section width-direction cutter 23 and the post-processing section width-direction cutter 41 in the state where cutting starts as shown in Fig. 14(a), it is necessary to take into consideration the effect of slack. In the embodiment, the cutting timing of the supply section width direction cutter 23 is controlled by the transport amount calculated from the rotation amount of the supply section drive roller 24a, and the cutting timing of the post-processing section width direction cutter 41 is controlled by the transport amount calculated from the rotation amount of the post-processing section drive roller 44. Here, the difference between the gap between the supply section width direction cutter 23 and the supply section drive roller 24a and the gap between the post-processing section width direction cutter 41 and the post-processing section drive roller 44 is automatically corrected in calculating the transport amount.

[0100] The process of being able to continuously manufacture a new product shown in FIG. 14(a) from the state where the manufacture of the product shown in FIG. 14(i) has been completed will be described below. The supply unit side transport amount L1 for controlling the supply unit width direction cutter 23 is counted based on the point when the supply unit nip roller 24b is in a state of being nipped by the supply unit drive roller 24a with the film interposed therebetween. The film transported by the supply section drive roller 24a passes through the transport section 30 and reaches the post-processing section drive roller 44 of the post-processing section 40. Here, in the above embodiment, the distance between the supply section width direction cutter 23 and the post-processing section width direction cutter 41 is 20 m, but since slack occurs, the film actually needs to be transported 20 m or more (e.g., 20 m x 20 cm) to reach the post-processing section width direction cutter 41 from the supply section width direction cutter 23.

[0101] When the film transported with some slack reaches post-processing section drive roller 44, post-processing section nip roller 45 nips the film with post-processing section drive roller 44. Post-processing section side transport amount L2 for controlling post-processing section width-direction cutter 41 is counted based on the transport amount when post-processing section nip roller 45 nips the film with post-processing section drive roller 44. That is, in the state shown in (a) of Figure 14, if the distance between the supply section width direction cutter 23 and the post-processing section width direction cutter 41 is 20 m and the amount of slack is 20 cm, the supply section side conveying amount L1 for controlling the supply section width direction cutter 23 calculated from the rotation amount of the supply section drive roller 24a is in a state where 20 m20 cm has been counted, and the post-processing section side conveying amount L2 for controlling the post-processing section width direction cutter 41 calculated from the rotation amount of the post-processing section drive roller 44 is in a state where 0 m has been counted.

[0102] In this way, by determining the supply section side conveying amount L1 and the post-processing section side conveying amount L2 in the state shown in (a) of Figure 14, including the amount of slack, and controlling the supply section width direction cutter 23 with the supply section side conveying amount L1 and the post-processing section width direction cutter 41 with the post-processing section side conveying amount L2, the timing for cutting the product can be determined in the state shown in (a) of Figure 14, without being affected by the amount of slack. In other words, in the state shown in (d) of Figure 14, the supply section side conveying amount L1 is counted including the distance due to sagging (20 cm), so when the supply section side conveying amount L1 becomes the total length of all products (28 m), the film is cut widthwise by the supply section width direction cutter 23.

[0103] In addition, in the above control, when the film is set from the state shown in Fig. 14(i) to the state shown in Fig. 14(a), any amount on the downstream side in the transport direction can be discarded without being used as a product. In this case, the feed section side transport amount L1 and the post-processing section side transport amount L2 are calculated by including the arbitrarily specified transport direction length of the film to be discarded in the setting for the above cutting. The above-mentioned linked control of the feed section width direction cutter 23 and the post-processing section width direction cutter 41 can be used for any combination of film lengths and production quantities other than those mentioned above. After the film has been cut by the supply section width direction cutter 23 and the rear end of the film has passed, control of the supply section transport device 24, air blowing device 50, static electricity removal device 60, and transport conveyor 39 can be automatically stopped.

[0104] As an example, by making it possible to independently control the supply section 20 and the downstream side of the conveying section 30 in operation, when the rear end of the film passes through the supply section 20 (the state shown by (d) in Figure 14), the operation of the supply section 20 can be stopped so that while the product 7 is being processed downstream of the conveying section 30, preparations for manufacturing the next product, such as replacing the roll body 2, can be made in the supply section 20 in parallel, thereby improving work efficiency. When the rear end of the film passes along the transport conveyor 39 of the conveying section 30, each transport conveyor 39 is stopped in sequence in accordance with the passage of the rear end of the film, and each stopped transport conveyor 39 can be prepared for the production of the next product. In addition, by automatically stopping unnecessary parts, the life of the unwinding machine 10 can be extended and power consumption can be reduced.

[0105] The feed section width direction cutter 23 and the post-processing section width direction cutter 41 may each have a function of cutting independently in addition to the above-mentioned interlocking control. By enabling independent cutting, it is possible to continue manufacturing products even if part of the machine breaks down. As an example, if there is a malfunction upstream of the supply section width direction cutter 23, the operation of the unwinding machine 10 is stopped due to the malfunction, the rear end of the film is cut by the supply section width direction cutter 23, and the transport of the film downstream of the supply section width direction cutter 23 is resumed, and the film remaining on the transport section 30 downstream of the supply section width direction cutter 23 can be discharged as product 7. If the length of the film remaining on the conveying section 30 after the film conveyance is resumed becomes such that the product 7 cannot be manufactured at the timing of cutting by the post-processing section width-direction cutter 41 before the conveyance was interrupted, the film remaining on the conveying section 30 is discharged as waste to the post-processing section 40. The post-processing section 40 may fold and discharge the waste in the same manner as the product 7, or may discharge the waste from the post-processing section 40 without folding by the oscillating device 47. During the above-mentioned linked control, the operation of the supply section width direction cutter 23 can be stopped as desired. This control is used when the remaining amount of film on the roll 2 is small and it is desired to transport the remaining film on the roll 2 onto the transport section 30. By preventing a length of film that cannot be used by the unwinder 10 from remaining on the roll body 2, work efficiency can be improved and waste can be reduced.

[0106] In the unwinding machine 10 of the present invention, a plurality of roll bodies 2 are provided in the supply section 20, and when the tubular continuous film 1 supplied from one roll body 2 is attached to the supply section 20 toward the conveying section 30, a film splicing device may be provided that cuts the attached tubular continuous film 1 in the width direction, attaches tubular continuous film 1 from another roll body 2 to the rear end side of the tubular continuous film 1 cut in the width direction, and replaces the tubular continuous film 1 supplied to the unwinding machine 10. By providing a film splicing device, the workability when replacing the roll body 2 can be improved.

[0107] The unwinding machine 10 of the present invention can be configured as follows. The supply unit 20 is configured to receive a cylindrical, uncrushed tubular continuous film from a film forming machine or the like, cut one or two consecutive locations, and convey the film to the conveying unit 30. In this configuration, the upper part of the tubular continuous film may be cut and air may be blown onto it to spread it out, or the lower part of the tubular continuous film may be cut and V-shaped guides (33, 34) may be used to spread it out. Moreover, the film is conveyed from the supply unit 20 in a folded state without being cut toward the conveying unit 30, and is unwound in the conveying unit 30 while being spread out by using V-shaped guides (33, 34). In addition, the film stored in a container or the like in a disorderly manner is transported toward the transport section 30, and is unwound in the transport section 30 while being spread out by utilizing V-shaped guides (33, 34).

[0108] According to the unwinding machine 10 of the present invention, the following effects can be obtained. By blowing air, it is possible to prevent the upper film 3 and the lower film 4 of the cylindrical continuous film 1 from being transported downstream in a stuck state, and by arranging the air outlets 55, 56, 57, and 58 in an arrangement spreading out in a V-shape along the transport direction, even a film used in a large agricultural vinyl greenhouse with a large width can be transported smoothly and wrinkles on the downstream side can be prevented. By installing the static eliminator 60 so that it spreads in a V-shape along the transport direction, static electricity generated between films can be eliminated even for films used in large agricultural vinyl greenhouses with a large width, preventing the films from sticking together due to static electricity, allowing for smooth transport and preventing wrinkles on the downstream side.

[0109] By providing V-shaped guides (33, 34) for sucking air so as to guide the entire width of the single-row continuous film 6, even a film used for a large agricultural vinyl house, which has a wide width when unrolled, can be unrolled into the single-row continuous film 6 without wrinkles being generated due to friction with the conveying section 30 during conveyance. The widthwise one-side conveying section pressing roller 37 and the widthwise other-side conveying section pressing roller 38 apply a pulling force in a direction to spread the single-line continuous film 6 in the width direction, thereby preventing the single-line continuous film 6 from wrinkling. By providing a transport conveyor device 31 capable of sucking and transporting the film transported from a supply section 20 so as to guide the entire width of the unrolled single-row continuous film 6, even a film used for a large agricultural vinyl house, which has a wide width when unrolled, can be stably transported and unrolled into the single-row continuous film 6 without wrinkles.

[0110] By cutting the last product produced in succession on the supply section 20 side, after the product is produced, no film is left downstream of the supply section width direction cutter 23, and products of any length can be produced. In the past, film that remained on a roll-removing machine for a long time was disposed of as waste, but by controlling the use of the supply section width direction cutter 23 and the post-treatment section width direction cutter 41 in the present invention, it is possible to prevent the film from remaining on the supply section 20 and the conveying section 30 and causing waste. In particular, in the case of film used in large, wide agricultural vinyl greenhouses, the price per unit length is high, so the effect of preventing waste is significant. [Explanation of symbols]

[0111] 1...tubular continuous film, 2...roll body, 3...upper film, 3a...one side portion in width direction, 3b...other side portion in width direction, 4...lower film, 5...film in spread state, 6...single single-row continuous film, 7...product, 10...unrolling machine, 20...supply section, 21...conveying direction cutter, 21a...center cutter section, 21b...other side cutter section, 21c...one side cutter section, 23...supply section width direction cutter, 24...supply section conveying device, 24a...supply section drive roller, 24b...supply section nip roller, 25...buffer section, 28a...upper conveying roller, 28b...middle conveying roller, 28c...lower conveying roller, 30...conveying section, 31...conveyor device, 31a...conveying surface, 31b...upstream side portion in conveying direction, 31c...middle portion in conveying direction, 31d...downstream side portion in conveying direction , 33... one width direction guide, 34... the other width direction guide, 37... one width direction conveying section pressure roller, 38... the other width direction conveying section pressure roller, 39... conveying conveyor, 40... post-processing section, 41... post-processing section width direction cutter, 42... post-processing section conveying device, 43... oscillating device, 44... post-processing section drive roller, 45... post-processing section nip roller, 50... air blowing device, 55... one side upper air blowing port, 56... one side lower air blowing port, 57... other side upper air blowing port, 58... other side lower air blowing port, 60... static electricity eliminating device, 61... one width direction static electricity eliminating member, 62... other width direction static electricity eliminating member, 73... suction conveying belt, 74... conveying belt, 80... cutter section, 82... cutter section moving device, 94... cutter blade, 95... contact plate, 96... pressing member.

Claims

1. a conveying section that conveys the film while spreading it; a supply section for supplying the film to the conveying section; In a roll-removing machine equipped with the transport section includes a transport conveyor device having a width on the downstream side in the transport direction that is wide enough to transport the entire width of the single single-line continuous film into which the film has been spread, and a width on the upstream side in the transport direction that is narrower than the width on the downstream side in the width direction and transports only the central portion of the single single-line continuous film in the width direction, the transport conveyor device widening in a V-shape toward the downstream side in the transport direction; and V-shaped guides that are V-shaped and widening toward the downstream side in the transport direction and are provided along both sides in the width direction of the transport conveyor device to guide the film to the transport surface of the conveyor device. A roll-removing machine comprising:

2. In the winding machine according to claim 1, a post-processing section provided downstream of the conveying section; the transport conveyor device has a function of transporting the film and the single-row continuous film while suctioning them, a roll-up machine that transports the film and the single-row continuous film toward the post-processing section while sucking them;

3. In the winding machine according to claim 1, The V-shaped guide is equipped with a suction port for sucking the film, and the film unwinder guides the film to the conveying surface of the transport conveyor device while sucking the film.

4. In the winding machine according to claim 1, The transport section of the film unwinder is provided with a transport section pressure roller on a transport surface of the transport conveyor device that applies a tensile force to spread the single-row continuous film in the width direction.

5. In the winding machine according to claim 1, The supply section is equipped with a conveying direction cutter that cuts, in the conveying direction, the upper film of a tubular continuous film which is crushed and supplied in a flattened state by an upper film and a lower film, and a unwinding machine that conveys the tubular continuous film with the upper film cut in the conveying direction by the conveying direction cutter to the conveying section.

6. In the winding machine according to claim 5, The supply section of the unwinding machine is provided with a buffer section that transports the tubular continuous film from top to bottom after the upper film has been cut.

7. In the winding machine according to claim 5, the supply unit includes a buffer unit that transports, from top to bottom, the tubular continuous film from which the upper film has been cut, and an air blowing device that is provided in the buffer unit and has a plurality of air blowing ports that blow air in a direction that spreads the upper film from the inside to the outside, The upper film is transported to the transport section while being spread out by air from the air outlet.

8. In the winding machine according to claim 7, the air outlets are provided at the upper and lower portions of both sides of the buffer in the width direction, and the air outlet at the upper portion blows out more air than the air outlet at the lower portion; The plurality of air blowing ports are arranged in a V-shape in the unwinding machine.

9. In the winding machine according to claim 7, the buffer unit includes a static eliminator that removes static electricity charged on the upper film and the lower film, The static eliminator is attached along the air outlet, A roll-removing machine in which the upper film and the lower film are transported to the transport section while being neutralized by the neutralization device.

10. In the winding machine according to claim 1, a post-processing section provided downstream of the conveying section; The post-processing section is equipped with a swivel device that supports the single-row continuous film and oscillates up and down on the downstream side in the transport direction with the upstream side as a fulcrum, thereby folding the single-row continuous film in an accordion-like shape.

11. In the winding machine according to claim 1, a post-processing section provided downstream of the conveying section; the supply section includes a supply section width direction cutter that cuts the film along a width direction perpendicular to a conveying direction, The post-processing section includes a post-processing section width direction cutter that cuts the single-row continuous film along a width direction perpendicular to a conveying direction, When a plurality of cut products of any size combination are continuously produced from the film, The product is usually cut by the post-treatment section width direction cutter according to the transport amount of the film, Controlling the cutting of only the upstream side of the last product to be manufactured by the width direction cutter of the supply unit, A roll-removing machine that calculates the length of the products to be continuously manufactured, the length between the width direction cutter of the supply section and the width direction cutter of the post-treatment section, and the conveying amount.

12. In the winding machine according to claim 11, The conveyance amount for determining the timing of cutting by the width direction cutter of the supply section is calculated from the rotation amount of the drive roller of the supply section; a conveyance amount for determining a timing of cutting by the post-processing section width direction cutter is calculated from a rotation amount of a post-processing section drive roller; The conveyance amount for determining the timing of cutting by the width direction cutter of the supply section is set to the width direction cutter of the post-treatment section before the film is continuously cut to start manufacturing products. A film unwinding machine in which an amount of slack occurring in the film between the supply section and the post-processing section is added to a calculation of a transport amount for determining a timing of cutting by a width direction cutter of the supply section.

13. In the winding machine according to claim 11, During the control, the control is interrupted at any timing, cutting is performed by the width direction cutter of the supply section at the time of interruption, and the width direction cutter of the post-treatment section continues cutting at the timing of cutting before the interruption, When the length of the film remaining in the transport section is such that a product cannot be manufactured in the post-processing section at the timing of cutting before interruption, the film remaining in the transport section is discharged to the post-processing section.

Images