JPH07300277A - Safety device for synthetic resin sheet folding device - Google Patents

Abstract

PURPOSE:To instantly stop the operations of various sections of a folding device when a worker instantaneously moves a hand at the position for setting the start end of a sheet to feed rollers. CONSTITUTION:This synthetic resin sheet folding device is provided with arms 4 reciprocating the feed rollers 45, 46 between the feed action position at the upper section of a frame 1 and the sheet reception position at the lower section of the frame 1. The frame 1 is provided with a low cover frame 11 covering the sides of the arms 4 in the prostrated attitude and a high cover frame 12 extended upward from the rear end section of the low cover section and covering the sides of the arms 4 in the erected attitude. A wire 9 is stretched in an L-shape along the upper edge of the lower cover frame 11 and the front edge of the high cover frame 12, and a switch 91 for stopping the action of a folding device is provided at the end section of the wire 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety device for a folding device used when a synthetic resin sheet for agricultural and horticultural purposes is folded in a meandering shape.

[0002]

2. Description of the Related Art A vinyl chloride resin sheet for agricultural and horticultural purposes (hereinafter referred to as "agricultural bisheet") used in a greenhouse such as a greenhouse for horticulture, which has a large deployment area, is folded and stored or transported. One of the ways to fold this kind of thick bisheet is to make a long laminated sheet in the direction along the fold line by folding it back and forth in a meandering manner so that the width becomes about 600 mm, and the laminated sheet is placed at a plurality of longitudinal positions It is known to fold it in a meandering shape.

As a conventional folding device used to fold back the laminated sheet in a meandering manner at a plurality of longitudinal positions, a feeding roller for feeding a thick bisheet (that is, the laminated sheet) and a feeding device are provided in a machine frame. It is known that a guide cylinder for swinging off the dense bisheet that is fed out by a roller and descends by its own weight is passed while sorting it forward and backward, and a folding base that receives the dense bisheet that is shaken off through the guide cylinder. It was

In such a folding device, in order for the thick bisheets shaken off by the guide tube to be folded back in a meandering shape on the folding table one after another, the machine frame is made tall and the upper part of the machine frame is folded. It is necessary to attach the feed roller and the guide tube to the high position (that is, at a high place), and to secure a sufficiently long interval between the guide tube and the folding base below the guide tube. For this reason, even in the conventional folding device, the feed roller is attached to the upper part of the machine frame.

However, if the feed roller is mounted at a high place, it takes time and effort to set the starting end portion of the thick bisheet (that is, the above-mentioned laminated sheet) on the feed roller when the folding work is started. In particular, since a laminated sheet in which a thick sheet having a large developed area is folded back in a meandering shape is heavy, a great amount of labor is required when setting it on the feed roller.

Therefore, the inventor of the present application set out to develop a folding device for a synthetic resin sheet which does not require lifting of the starting end portion of the synthetic resin sheet to a feeding roller at a high place at the start of the folding work, and such a folding device is used. Completed the device.
This product has a feed roller for feeding a synthetic resin sheet to the machine frame, a guide cylinder for passing the above-mentioned sheet which is drawn out by the feed roller and descends while passing it forward and backward, and a guide tube for passing through the guide tube. In a folding device for a synthetic resin sheet provided with a folding base for receiving the above-mentioned sheet, a free end portion of an arm in which a feed roller forming a feed roller is swung between a forward tilting posture and a standing posture. When the arm is in the forward tilted position, the feed roller is arranged at the low sheet receiving position, and when the arm is in the upright position, the feed roller is arranged in the feeding operation position.

According to the folding device having this structure, the starting end portion of the synthetic resin sheet can be set at a low position on the feed roller at the sheet receiving position, and when the arm is set in the standing posture after the setting, the synthetic resin sheet is moved by the feed roller. Since it can be lifted up to the feed operation position of the feed roller or the feed roller,
Eliminates the need to set the sheet on the feed rollers at high altitude.

[0008]

However, in the folding device configured as described above, the feeding roller moves toward the sheet receiving position and the feeding operation position as the arm in the forward tilting position rises toward the cutting position. If the arm starts to rise before the start end of the synthetic resin sheet has been set on the feed roller for some reason, it is extremely dangerous for the worker performing the setting. In addition, there is a possibility that the feeding of the synthetic resin sheet by the feed roller may not be performed properly for some reason, and smooth folding may not be continued.

The present invention has been made in view of the above circumstances, and the operator can quickly raise and lower the arm and the feed roller at a position where the starting end of the synthetic resin sheet is set on the feed roller. The sheet feeding by the feed roller and the operation of each part of the folding device can be immediately stopped, so that the safety of the operator can be improved and the trouble such as the failure of feeding the synthetic resin sheet can be minimized. An object of the present invention is to provide a safety device for a folding device for a synthetic resin sheet that can be suppressed.

[0010]

A safety device of a folding device for a synthetic resin sheet according to the invention described in claim 1 is a feeding roller for feeding a synthetic resin sheet to a machine frame, and a feeding roller for feeding the synthetic resin sheet lowers. In a folding device for a synthetic resin sheet, which is provided with a guide cylinder for swinging-off that allows the sheet to pass through while being sorted forward and backward, and a folding base that receives the sheet that has been shaken off through the guide cylinder, a feed roller is provided at the upper part of the machine frame. It has a lift mechanism that reciprocates between the feed operation position of the machine and the sheet receiving position at the bottom of the machine frame. An arm with a feed roller attached to the end, and this arm corresponds to the forward tilting posture corresponding to the sheet receiving position of the feed roller and the feed operation position of the feed roller It is configured by an arm drive mechanism that swings around the horizontal axis between the upright posture and the machine frame, and a low profile cover frame that covers the sides of the arm in the forward leaning position and a low profile cover portion. A tall cover frame that extends upward from the rear end and covers the side of the arm in the standing posture is provided, and a wire is provided along the upper edge of the low cover frame and the front edge of the tall cover frame. It is stretched in an L shape, and a switch is connected to an end of the wire to stop the operation of the folding device by detecting that the wire is pulled at a proper position.

[0011]

In this structure, the operator can set the starting end portion of the synthetic resin sheet on the feed roller at the sheet receiving position at a low place beside the low profile cover frame.
Then, as long as the worker is positioned beside the short cover frame or beside the tall cover frame, the worker can pull the wire by himself. Regardless of where on the wire is pulled, the switch that detects that the wire is pulled causes the folding device to stop operating.

[0012]

1 is a schematic perspective view of a folding device according to an embodiment of the present invention, and FIG. 2 is a schematic side view for explaining the operation of the folding device.

The machine frame 1 of the folding device includes a low profile cover frame 11, a tall cover frame 12 extending upward from a rear end of the low profile cover frame 11, and a rear end of the tall cover frame 12. When the folding work is started, the starting end portion of the synthetic resin sheet 100 (described later) is utilized by utilizing the empty space S secured above the low profile cover frame 11. It is supposed to be set. Tall cover frame 12 and rear 1
A folding table 30 composed of a belt conveyor is provided over the area 3. Further, support rollers 21 are horizontally attached to the front end corners of the low-profile cover frame 11 so as to be freely rotatable, and lateral shake preventing rollers 22, 22 of the synthetic resin sheet 100 are freely rotatable at positions near both ends of the support rollers 21. Is attached to. Further, a support shaft 31 is horizontally laid horizontally at an appropriate position in the upper half portion of the tall cover frame 12, and a guide tube 3 is suspended on the support shaft 31 so as to be swingable back and forth. In FIG. 2, the swing direction of the guide cylinder 3 is indicated by an arrow A.

A horizontal shaft 41 is provided at an appropriate position in the lower half of the tall cover frame 12, and a base end 42 of the arm 4 is swingably attached to the horizontal shaft 41. The arm 4 is provided with a beam portion 44 at its free end. Feed rollers 45 and 46 are separately attached to one end and the other end of the beam portion 44, respectively, and the feed roller 45 is provided. A lateral shake preventing roller 47 of the synthetic resin sheet 100 is provided so as to be freely rotatable at each of the locations near both ends of the. A swinging link 5 having an L-shaped traverse rod 51 is attached to the arm 4 as shown in FIG.
As shown in FIG. 5, one end of the connecting rod 52 is connected to the swing link 5, and the other end of the connecting rod 52 is a V-shaped swing that is swingably attached to the beam portion 44. An air cylinder 54 is connected to one end of the moving link 53 and further between the other end of the swinging link 53 and an appropriate position of the arm 4. And the air cylinder 5
The pushing operation of No. 4 is transmitted to the swing link 5 through the swing link 53 and the connecting rod 52, and the traverse rod 51 comes close to and comes into contact with the feed roller 46 as shown by the two-dot chain line in FIG. ing. Further, the retracting operation of the air cylinder 54 is transmitted to the swing link 5 via the swing link 53 and the connecting rod 52, so that the traverse rod 51 is separated from the feed roller 46 as shown by the one-dot chain line in FIG. ing. In this embodiment, the swing link 5, the traverse rod 51, the connecting rod 52, the swing link 53 and the air cylinder 54 are used.
However, the clamp mechanism 50 is configured in cooperation with the lower rod 46.

As shown in FIG. 2, an arm driving mechanism, which is an air cylinder 55, is interposed between the arm 4 and the lower portion of the machine frame 1. When the air cylinder 55 is pushed out, the arm is driven. 4 is in the standing posture shown by the solid line in FIG. 2, and when the air cylinder 55 is retracted, the arm 4
Is in the forward tilted position shown by the chain double-dashed line in FIG. And
When the arm 4 is in the upright posture, the pair of feed rollers 45 and 46 are provided at the feed operation position, and the feed roller 46 of the feed rollers 45 and 46 on the sheet feeding direction side is the guide tube 3 described above. Deployed above.
Further, when the arm 4 is in the forward tilted posture, the feed roller 46 on the feed direction side is arranged at substantially the same height as the support roller 21. Further, the arm 4 in the standing posture is laterally covered by the tall cover frame 12, and the arm 4 and the feed rollers 45, 46 in the forward tilted posture are laterally covered by the short cover frame 11. In this embodiment, the arm 4 and the air cylinder 55 are used.
And the feed roller 45, 4
A lift mechanism 40 is configured to reciprocate 6 between the feeding operation position at the upper part of the machine frame 1 and the sheet receiving position at the lower part of the machine frame 1. The clamp mechanism 50 is configured such that the synthetic resin sheet 1 wound around the feeding roller 46 when the feeding roller 46 on the sheet feeding direction side is at the sheet receiving position.
When the feed roller 46 is in the feed operation position, the holding state of the synthetic resin sheet 100 is released.

A pair of pressing rollers 61, 6 are provided on the upper part of the machine frame 1.
2 are provided, and the pair of feed rollers 45 and 46 in the feed operation position face the press rollers 61 and 62, respectively. The pair of pressing rollers 61 and 62 and the pair of feed rollers 45 and 46 at the feed operation position are respectively
Spaced in the sheet feeding direction.

A support shaft 63 is horizontally provided on the upper portion of the tall cover frame 12, and a pair of support members 64, 64 are swingably attached to the support shaft 63 in a state of extending in opposite directions. And a pair of pressing rollers 61, 62 described above are provided at the respective end portions of these supporting bodies 64, 64.
Are installed separately. In addition, each of the pair of supports 64, 64 and the bracket 65 on the machine frame 1 side
Air cylinders 66, 66 are interposed between the and.

FIG. 3 is an explanatory view showing a rotation transmission mechanism 70 for individually transmitting the rotation of each of the pair of feed rollers 45 and 46 and each of the pair of press rollers 61 and 62. The rotation transmission mechanism 70 decelerates the rotation of the rotary motion distribution wheel 71, which is arranged concentrically with the support shaft 63, and the output shaft 73 of the rotary drive source 72, which is a motor, to the rotary motion distribution wheel 71. The first endless belt 74 that transmits by
A pair of wheel bodies 75, 76 respectively connected to the pair of presser rollers 61, 62 respectively, and these wheel bodies 75, 7
The second endless strips 77 and 78 for transmitting the rotation of the rotary motion distribution wheel 71 to the first and second endless strips 74 and the first endless strip 74 interposed between the first endless strip 74 and the intermediate portion of the rotation path. From the intermediate wheel 79, the first gear 81 connected to the intermediate wheel 79, the pair of wheel bodies 82 and 83 respectively connected to the pair of feed rollers 45 and 46, and these. Of the pair of feed rollers 45 and 46 and the feed roller 46 on the sheet feeding direction side, and connected to the first gear 81. The second gear 85 is meshed with the second gear 85. The meshing of the second gear 85 with the first gear 81 is such that the arm 4 is changed from the forward tilted posture to the standing posture, and the pair of feed rollers 45, 46 separates the synthetic resin sheet 100 in the feed direction. It is performed only when it is supported from below in two places.

As shown in FIGS. 1 and 2, the wire 9 is L-shaped along the upper edge of the low cover frame 11 and the front edge of the high cover frame 12 provided in the machine frame 1. It is stretched. The wire 9 has its end connected to a switch 91 attached to the upper portion of the front edge of the tall cover frame 12, and the switch 91 detects that the wire 9 is pulled somewhere, and the wire 9 is folded. The operation of the device is designed to be stopped urgently.

Next, the work of folding the synthetic resin sheet 100 will be described. The synthetic resin sheet 100 used for this folding operation is the laminated sheet shown in FIG. That is, the laminated sheet is a wide sheet folded back in a meandering manner at a predetermined position in the width direction, and the feeding direction at the time of folding is the folding line 101 provided in the laminated sheet.
Is along the direction. Such a folding operation is performed, for example, on the deep bisheet. In FIG. 8, the sheet feeding direction is indicated by an arrow B.

In FIG. 4, the leading end of the sheet 100, which is placed on the support roller 21 and drawn into the empty space S of the short cover frame 11, is wound around the feed roller 46 at the sheet receiving position and held by the clamp mechanism 50. It shows the state. The clamping by the clamp mechanism 50 is performed by the feed roller 46.
After winding the sheet 100 around the sheet, the air cylinder 54 is pushed out to bring the traverse rod 51 close to the feed roller 46 as indicated by an arrow C, and the traverse rod 51 and the feed roller 46 pinch the start end portion of the sheet 100. It is done by In this way, the sheet 100 is set on the feed roller 46 at a low place, and the work for setting the sheet 100 is facilitated. Further, since the lift mechanism 40 has the arm 4, the sheet receiving position of the feed roller 46 is ahead of the feed operation position. Therefore, the sheet 10
When the start end portion of 0 is set on the feed roller 46, the guide tube 3 and the like do not interfere and the setting is easy.

When the air cylinder 55 of the lift mechanism 40 is pushed out after the starting end portion of the sheet 100 is set on the feed roller 46, the arm 4 is changed from the forward tilted posture to the standing posture, and accordingly, the pair of feed rollers 45. , 46 move forward from the cylinder receiving position to the feeding operation position. Therefore, the seat 1 held by the clamp mechanism 50
Since 00 is lifted together with the feed rollers 45 and 46, the two positions of the sheet 100 are supported from below by the pair of feed rollers 61 and 62 as shown in FIG. Then, the air cylinders 66, 66 are pushed out in synchronism with this, and the pair of presser rollers 61, 62 move to the 2nd position of the sheet 100.
Press the part from above. Further, as shown in FIG. 8, since the second gear 85 meshes with the first gear 81, the rotary drive source 72
The rotation of the output shaft 73 is caused by the action of the rotation transmission mechanism 70 to cause the pair of feed rollers 45 and 46 and the pair of press rollers 61 and 62 to rotate.
Individually transmitted to the rollers 45, 46, 61,
A feeding force is applied to the sheet 100 from 62. Therefore, after the clamped state by the clamp mechanism 50 is released, the sheet 100 is fed by the feed roller 60, passes through the guide cylinder 3 below the sheet 100, and descends by its own weight.
When the guide tube 3 is swung in the front-rear direction at the same timing as the descending speed of the seat 100, the seat 100 descends while being sorted forward and backward, and the folding table 30 as shown in FIG.
Is folded in a meandering shape on the top. After the entire length of the sheet 100 is folded on the folding table 30, the belt conveyor forming the folding table 30 travels to carry the sheet 100 to the rear frame 13. Rear frame 1
3 includes a push plate 96 operated by an air cylinder 95.
Is attached, and the carried sheet 100 is compressed by the push plate 96 to expel the air trapped therein.

As described above, the sheet 100 is a laminated sheet obtained by folding a wide sheet back and forth in a serpentine manner at a predetermined position in the width direction, so that the sheet 100 drawn into the feed roller 60 has air. Is trapped. However, the air trapped in the sheet 100 is supported by the feed rollers 45 and 46 of the feed noise mechanism 60 from below and is pushed out from above by the press rollers 61 and 62, and is fed out.
It is expelled from the seat 100 while 0 passes. Therefore, the sheet 100 fed from the feed roller 60
Since it has a flat shape that is easy to fold, it can be folded neatly on the folding table 30. Further, the sheet 10
For 0, the feed force is transmitted individually from the pair of feed rollers 45 and 46 and the pair of press rollers 61 and 62, so that even if the sheet 100 is a laminated sheet in which air is confined, the guide cylinder is surely provided. It is rolled out toward 3. Further, the sheet pressing force of the pair of pressing rollers 61, 62 changes according to the bulk of the sheet 100 due to the cushioning property that the air cylinders 66, 66 generally have. For this reason, even if the sheet 100 is a thick bisheet that has been subjected to various surface coating treatments such as dust adhesion prevention treatment and water repellent treatment, it is less likely that the surface coat layer or the synthetic resin sheet will be damaged. There is. This advantage is
It is further promoted by sandwiching the sheet 100 at two positions by the feed rollers 45 and 46 and the pressing rollers 61 and 62.

In this embodiment, since the arm driving mechanism is composed of the air cylinder 55, the arm 4 can be swung quickly from the forward tilted posture to the standing posture due to the characteristics of the general air cylinder 55. it can. Therefore, at the sheet receiving position, the sheet 10
After the start end portion of 0 is set, the feed roller 46 is moved to the feed operation position, and then the sheet 100 is fed out and the folding work is started in a short time.

Further, in this embodiment, the operator can set the leading end of the sheet 100 on the feeding roller 46 located at the sheet receiving position at a low place beside the low profile cover frame 11. Then, as long as the worker is positioned beside the short cover frame 11 or beside the tall cover frame 12, the worker can pull the wire 9 by hand, and pulls the wire 9 as such. And regardless of where the worker pulls the wire 9, the switch 91 that detects that the wire 9 is pulled stops the operation of the folding device, improving the safety of the worker and at the same time, the seat. Trouble such as 100 feeding failure can be minimized.

[0026]

According to the present invention, as long as the operator is located beside the low cover frame or the tall cover frame, the operator can pull the wire by hand to operate the folding device. Since it can be stopped, the arm and the feed roller move inadvertently when setting the start end of the synthetic resin sheet to the feed roller at the sheet receiving position, trouble occurs in feeding the sheet by the feed roller, and other The effect that the operation of the folding device can be immediately stopped to improve the safety of the operator when a trouble occurs in the operation of a part, and the operation trouble can be minimized. There is. Such an effect is particularly prominent when the wire is stretched in an L shape along the upper edge of the short cover frame and the front edge of the tall cover frame.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of a folding device according to an exemplary embodiment of the present invention.

FIG. 2 is a schematic side view for explaining the operation of the folding device.

FIG. 3 is an explanatory diagram showing a rotation transmission mechanism.

FIG. 4 is an explanatory diagram of a state in which a leading end portion of a sheet is set on a lower roller.

FIG. 5 is an explanatory diagram of a first stage of feeding a sheet from a feed roller.

FIG. 6 is an explanatory diagram of folding work.

FIG. 7 is an explanatory diagram of a state in which a folded sheet is compressed.

FIG. 8 is an explanatory view illustrating a synthetic resin sheet.

[Explanation of symbols]

 1 Machine frame 3 Guide tube 4 Arm 9 Wire 11 Low-profile cover frame 12 High-profile cover frame 30 Folding platform 40 Lift mechanism 41 Horizontal shaft 45,46 Feed roller 55 Air cylinder (arm drive mechanism) 91 Switch 100 Synthetic resin sheet

Claims (1)

[Claims] 1. A feeding roller for feeding a synthetic resin sheet, a swing-off guide tube for passing the sheet which is fed by the feed roller and descends while sorting the sheet forward and backward, and a swinging through the guide tube. In a folding device for a synthetic resin sheet provided with a folding base for receiving the dropped sheet, a lift mechanism for reciprocating a feed roller between a feeding operation position above the machine frame and a sheet receiving position below the machine frame is provided. This lift mechanism is equipped with an arm whose base end is swingably attached to the lower part of the machine frame around the horizontal axis and a feed roller is attached to the free end, and this arm is placed at the sheet receiving position of the feed roller. It is also composed of an arm drive mechanism that swings around the horizontal axis between a corresponding forward tilting posture and a standing posture corresponding to the feed operation position of the feed roller. A low profile cover frame that covers the side of the arm in the forward tilted position, and a high profile cover frame that extends upward from the rear end of the low profile cover and covers the side of the arm in the upright position. A wire is stretched in an L shape along the upper edge of the low cover frame and the front edge of the high cover frame, and the wire is pulled at a proper position at the end of the wire. A safety device for a folding device for a synthetic resin sheet, which is connected with a switch for detecting the operation of the folding device and stopping the operation of the folding device.