JPH0423878Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention is a synthetic resin sheet joining device used for a synthetic resin house for greenhouse cultivation, in which a sheet is bonded from a roll-shaped original sheet. This invention relates to a cutting device for aligning edges, which is used when cutting off the edges and aligning the edges when feeding out.

(Prior Art) Vinyl sheets used in greenhouses are made wide by joining the ends of a plurality of vinyl sheets having a predetermined width. In an apparatus for manufacturing such vinyl sheets, a plurality of vinyl sheets are continuously unwound from a roll-shaped raw material, and the ends of the vinyl sheets are overlapped, for example, and then connected to heating electrodes. It passes through a heat welding section equipped with rollers. Then, the overlapping portions of the ends are thermally welded by being pressed by an electrode roller.

(Problem to be solved by the invention) However, in the case of roll-shaped raw material, the edges of the vinyl sheet are usually uneven, and it is difficult to unroll the vinyl sheet from such a raw material. When the end portion is overlapped with the end portion of an adjacently unrolled vinyl sheet, the width of the overlapping portion is difficult to be uniform in the longitudinal direction. Therefore, when an overlapping portion with uneven width is pressed against and heated by an electrode roller, the overlapping portion meandering relative to the electrode roller as the vinyl sheet is fed out.
It becomes impossible to reliably heat weld the overlapping portions.

This invention solves these problems,
By cutting the edges of the vinyl sheet parallel to the feeding direction when the vinyl sheet is fed out from the original roll, the edges of adjacent vinyl sheets can be reliably overlapped or opposed to each other. An object of the present invention is to provide a cutter device for aligning edges.

(Problems to be Solved by the Invention) The cutting device for aligning the ends of synthetic resin sheets according to the invention includes a swingable arm member at a cutting position and a non-cutting position of one end of the sheet material, A shaft is rotatably supported by this arm member, and
A friction roller that contacts the sheet material and receives rotational force at one end of the shaft, and a disk cutter that is formed to have a diameter larger than the outer diameter of this roller by at least the thickness of the sheet to be cut out from the sheet material. A braking mechanism is attached to the other end of the shaft using the arm member as a fixed joint.

(Function) In the present invention, when the friction roller contacts and rotates against the original sheet, the disk cutter rotates, and the end of the sheet fed out from the original sheet is cut by, for example, the thickness. .

In addition, by using the braking force of the braking mechanism, the circumferential speed of the friction roller, that is, the circumferential speed of the disc cutter fixed coaxially with the friction roller, is made slower than the circumferential speed of the original sheet, resulting in sharp cutting. Make proper cuts.

(Example) This example shows a case where the cutting device according to the present invention is applied to a vinyl sheet joining device.

In FIGS. 1 to 4, 1 indicates a first feeding mechanism, and from this first feeding mechanism 1, adjacent vinyl sheets S with their ends abutted against each other are
1, S2 is rolled out. The first feeding mechanism 1 has a plurality of carts 2, and each cart 2 is provided with an original edge holder 3 for supporting a roller-wound vinyl sheet original fabric, and is also provided with a Correspondingly, cutting devices 4, 4 according to the invention are provided. The raw fabric holder 3 has a Y-shaped bearing 6 at the upper end of columns 5, 5 raised at the front and rear ends of the trolley 2.
6 are provided, and a support shaft 7 through which the original fabric is passed is placed on these bearings 6, 6.

The cutting device 4 is attached to the trolley 2, has an arm member 9 swingably attached to the upper end of the support column 8 via a pin 8a, and is rotatably supported by the upper end of the arm member 9 to cut the sheet material. A shaft 10 extending parallel to the opposite direction, a pair of friction rollers 11, 11 mounted to one end of this shaft 10 so as to be rotatable at the same time, and a pair of friction rollers 11, 11 mounted between these friction rollers 11, 11 so as to be rotatable at the same time. It is composed of a disc cutter 12 and a braking mechanism 13.

An elongated hole 9A is formed in the arm member 9, and by fitting a stop pin 9B passing through the elongated hole 9A into a recess 8A formed on one side of the upper end of the support 8, the arm member 9 of the cutting device 4 can be moved to the fourth position. It is held in the non-cutting position shown by the solid line in the figure, and when the stop pin 9B is pulled out of the recess 8A and brought into contact with the upper end surface of the support column 8, it swings to the cutting position shown by the imaginary line.

The braking mechanism 13 includes, for example, a fixed drum 13A and a braking force adjustment double nut 13B.
3A is fixed to the arm member 9 via a stay 13C, and as shown in FIG.
The double nut 13B is screwed into the double nut 13B, and a friction plate 13E is interposed between the pressing ring 13D adjacent to the double nut 13B and the fixed drum 13A. Therefore, depending on the amount of screw tightening of the double nut 13B, the friction plate 13E and the fixed drum 13
The braking force of the shaft 10 can be adjusted by adjusting the frictional force generated between the shaft 10 and the shaft 10.

Then, as shown in the fourth diagram, the friction roller 1
The outer circumferential surface 11a of the disc cutter 12 is set at a position that is retreated by α from the cutting edge 12a of the disc cutter 12. In the illustrated cutting device 4, the above α is set to a distance corresponding to the thickness of the material of the vinyl sheets S1, S2.

In the first feeding mechanism 1 shown in FIGS. 1 and 2, the moving paths of the plurality of carts 2 are provided in two parallel rows, and the moving paths of the plurality of carts 2... It is designed to be able to cross paths with trolley 2. If you configure it like this,
Since the distance between the carts 2 on one moving path and the carts 2 on the other moving path in the front-back direction can be set arbitrarily, the spacing between the sheets supported on the sheet holders 3 of each cart 2 can also be set arbitrarily. Can be set.

The machine frame 14 is located on the side of the moving path of the trolley 2 described above.
is installed. A plurality of brackets 15 are arranged in parallel on this machine frame 14, and support arms 16 are attached to each of these brackets 15 so that they can be raised and lowered. A guide roller 17 is provided at the tip of this support arm 16. Also, machine frame 1
A feed roller 18 is provided on the top of the roller 4.
This feed roller 18 is rotationally driven by a drive motor (not shown). Reference numerals 19 and 20 are electrode rollers provided between the guide roller 17 and the feed roller 18 described above. These electrode rollers 19 and 20 are connected to holes 21 in an inclined plate 21 provided at the top of the machine frame 14.
They are installed above and below sandwiching the electrode rollers 19 and 20, and are synchronously rotated by a command signal from the tuner 22, and are designed to heat the vinyl sheet passing between the electrode rollers 19 and 20 to a thermal welding temperature. . Further, these electrode rollers 19 and 20 have pressing surfaces wider than the width of the bonding vinyl sheet _S3 fed out from a second feeding mechanism 42, which will be described later. In addition, 2
3 is a pressing force adjustment mechanism for the upper electrode roller 19. Further, the machine frame 14 is provided with a cutting device 24 . This cutting device 24 is connected to the feeder 18
A pair of upper and lower rails 25, 25 provided at the rear of the
It is a self-propelled type that travels back and forth in the width direction of the vinyl sheet without lateral vibration along the rail 2 above.
It consists of a wheel 26 guided by 5 and 25, a cutter 27, a cutter drive motor 28, a travel drive motor 29, and a travel wheel 30. 31 is a folding device provided at the rear of the machine frame 14. This folding device 3
1 is a rotating shaft 32 attached to the machine frame 14 and a rotating shaft 33 supported by this rotating shaft 32 with an interval.
A plurality of endless belts 34 are wound between the connecting arm 35 connecting the rotating shafts 32 and 33, and a crank arm 36 provided on the machine frame 14.
are connected by a connecting rod 37, and as the crank arm 36 rotates in one direction as shown by arrow A in FIG. 1, the connecting arm 35 is reciprocated back and forth as shown by arrow B. The structure is as follows. Next, a beam member 38 is provided above the machine frame 14 and extends laterally. Support arm 39 provided on this beam member 38
A presser roller 40 is provided at the tip of the
By this presser roller 40, the feed roller 1
The vinyl sheet wrapped around 8 is pressed against the feed roller 18. In addition, the girder material 38 includes
A support rod 41 extending on the opposite side to the support arm 39 is arranged in parallel, and a roll-shaped original fabric of the bonding vinyl sheet _S3 is supported at the tip of the support rod 41. Therefore, the support rod 41 serves as a second feeding mechanism 4 that feeds out the rolled vinyl sheet _S3 for joining.
2.

Next, the operation of the above bonding device will be explained with reference to FIG.

The vinyl sheets S 1 _{, 2} that are fed out from the raw material supported by each cart 2 of the first feeding device 1 are cut straight at both ends by cutting devices 4, 4 in parallel to the feeding direction. . That is, as shown by the imaginary line in FIG. 4, the stop pin 9B is pulled out from the recess 8A of the column 8, brought into contact with the upper end surface of the column 8, and the arm member 9 is tilted toward the sheet material side, and the disk cutter is removed. The cutting edge 12a of 12 is bitten into the original sheet, and the friction roller 11 is brought into contact with the outer periphery of the original sheet.

In addition, by adjusting the amount of screw tightening of the double nut 13B and adjusting the frictional force generated between the friction plate 13E and the fixed drum 13, the braking force can be adjusted to an appropriate level, that is, applied to the original sheet. Friction roller 11 that comes into contact with the roller and receives rotational force due to its frictional force.
As a result, the peripheral speed of the cutting edge 12a of the disk cutter 12, which rotates simultaneously with the friction roller 11, becomes slightly slower than the peripheral speed of the sheet material, that is, the sheet feeding speed. If the size is set, there will be a relative speed difference between the rotating disk cutter 12 and the sheet being fed out, so that the sheet can be easily and properly cut.

Note that the ends of the cut raw sheet, that is, the ears, are appropriately fed out and stored.

The vinyl sheets S _{1 , 2} whose edges have been aligned as described above by the cutting device 4 are then guided between the upper and lower electrode rollers 19 , 20 via the guide roller 17 , and then guided to the feed roller 18 . After being wrapped, it is placed on the endless belt 34 of the folding device 31.

On the other hand, the joining vinyl sheet S ₃ fed out from the second feeding device 42 is fed to the electrode rollers 19 and 20.
After being wrapped around the turning pin 43 in front of the electrode rollers 19 and 20, the electrode rollers 19 and 20 are guided between the upper and lower electrode rollers 19 and 20. In this case, the ends of the vinyl sheets S _{1 and S 2} are opposed to each other, and the vinyl sheet S ₃ for joining is attached to these vinyl sheets S 1 so as to straddle the opposed parts of the vinyl sheets S 1 _{and 2 . ,2} are superimposed. Since the ends of the vinyl sheets S1 _{, 2} are aligned by the cutting device 4, the mutual spacing between the ends is substantially uniform in all parts. Therefore, the upper and lower electrode rollers 19 and 20 connect the vinyl sheets S _{1 and 2} to the vinyl sheet for joining.
When the electrode rollers ₁₉ and 20 are sandwiched and heated,
The vinyl sheets S _1, 2 and the joining vinyl sheet S ₃ can be reliably heat-welded without the opposite ends of the vinyl sheets S _1, 2 protruding from the vinyl sheets S 1, 2.

Here, the pressing surfaces of the electrode rollers 19, 20 are made wider than the width of the vinyl sheet _S3 for bonding. In this way, the entire width of the joining vinyl sheet S ₃ is completely thermally welded to the end portions of the vinyl sheets S _{1 and} S 2.

The vinyl sheet S heat-welded by the electrode rollers 19 and 20 passes through the folding device 31 and is placed on the pedestal 4.
4 is paid out to the top. The endless belt 34 of the folding device 31 rotates in synchronization with the feeding speed of the vinyl sheet S due to the rotation of the rotating shafts 32 and 33.
Due to the rotation of the vinyl sheet S, the vinyl sheet S swings back and forth as shown by arrow B.
is dispensed onto the tray 44 as described above while being folded. After a predetermined length of vinyl sheet S is delivered onto the receiving table 44, the rotation of the feed roller 18 is stopped, the heat welding of the vinyl sheet by the electrode rollers 19 and 20 is stopped, and the vinyl sheet S is cut by the cutting device 24. cut.

The feed roller 18 is used to feed the vinyl sheet.
Continuously granted by. In the illustrated example, the feed roller 18 is provided immediately after the electrode rollers 19, 20, so that the vinyl sheets S1, _{2, and 3} that are sandwiched between the electrode rollers 19, 20 and thermally welded do not loosen. The overlapping parts of _{1, 2, and 3} can be reliably heat welded, and the vinyl sheet can be extremely long.
S _1,2,3 can be easily and reliably heat welded.

(Effects of the invention) As explained above, according to the present invention, a shaft is rotatably supported on an arm member that is swingable between a cutting position and a non-cutting position at one end of the sheet material, and one end of the shaft is rotatably supported. a friction roller that comes into contact with the sheet material and receives rotational force, and a disk cutter having a diameter larger than the outer diameter of the roller by at least the thickness of the sheet to be fed out from the sheet material; In addition, since a braking mechanism with an arm member as a fixed node is attached to the other end of the shaft, it is possible to cut the ends of the sheets unrolled from the original sheet one by one, so that the ends of the adjacent vinyl sheets can be cut off one by one. They can be precisely opposed or overlapped.

Further, by adjusting the braking force of the braking mechanism to make the circumferential speed of the disc cutter slightly slower than the circumferential speed of the sheet material, sharp and appropriate cutting can be easily achieved.

[Brief explanation of drawings]

FIG. 1 is a side view of a joining device to which an embodiment of the cutting device of the present invention is applied, FIG. 2 is a perspective view of the same, FIG. 3 is a front view of the cutting device, FIG. 4 is a side view of the same, and FIG. The figure is a sectional view taken along the line V-V in FIG. 4. 2... Truck, 4... Cutting device, 9... Arm member, 10... Shaft, 11... Friction roller, 12...
Disc cutter, 13...braking mechanism, 19,2
0...Electrode roller.

Claims (1)

[Scope of utility model registration request] A roll-shaped synthetic resin sheet raw material is rotatably supported on each of a plurality of raw material carts that are arranged parallel to each other at required intervals in the main body of the splicing machine, and these raw sheet materials are rotated in the longitudinal direction. At least one end of the synthetic resin sheet is cut off parallel to the feeding direction, and the synthetic resin sheet is fed out to the welding machine main body side, and the adjacent side edges of the fed out synthetic resin sheets are high-frequency welded using an electrode roller. In the joining apparatus, a swingable arm member is provided at a cutting position and a non-cutting position of one end of the sheet material, a shaft is rotatably supported by this arm member, and the sheet is attached to one end of the shaft. A friction roller that contacts the original fabric and receives rotational force, and a disk cutter whose diameter is larger than the outer diameter of this roller by at least the thickness of the sheet to be cut out from the original fabric are fixed, and other than the shaft 1. A cutting device for aligning edges of synthetic resin sheets in a synthetic resin sheet joining device, characterized in that a braking mechanism is attached to the end portion using the arm member as a fixed joint.