JP2000317720A - Shearing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress the abrasion of a pinch roller and stably feed a plate by pressing the plate from above with the pinch roller immediately after the tip of the plate passes through a position directly below the pinch roller, and holding the plate from above with a hold section when the plate enters between the hold section and a lower blade. SOLUTION: The operation of an air cylinder 37 is controlled by a control means 47 to lower a lift body 35, and a plate W is pressed from above by a pinch roller 39 immediately after the tip of the plate W passes through a position directly below the pinch roller 39. When the plate W enters between a hold section 43 and a lower blade 11, the plate W is held by the hold section 43 from above. The collision between the tip face of the plate W and the pinch roller 39 can be avoided, and the abrasion of the pinch roller 39 can be suppressed. Since the plate W is held from above by the pinch roller 39 and the hold section 43, the plate W can be stably fed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shearing machine for shearing a plate.

[0002]

2. Description of the Related Art A conventional shearing machine is disclosed, for example, in Japanese Utility Model Laid-Open No. 6-57515. The conventional shearing machine will be described below.

That is, the above-mentioned shearing machine is based on a pair of side frames facing left and right, and the pair of side frames is connected by appropriate means. An upper frame is provided so as to be able to ascend and descend at an upper portion between the pair of side frames, and a lower frame is provided at a lower portion between the pair of side frames. On the lower side of the upper frame, an upper blade is provided extending in the left-right direction. On the upper side of the lower frame, a lower blade performing shearing in cooperation with the upper blade is provided extending in the left-right direction.

A work supporting member for supporting the plate material W is provided on the front side of the lower blade, and a front frame is provided on the front side of the upper frame between the pair of side frames. Is provided with a plate holding device for pressing and fixing the plate material to the upper surface of the lower blade during shearing. A swing arm is provided on the front side of the front frame so as to be swingable up and down via a hinge pin, and a tip portion of the swing arm projects rearward, and a tip of the swing arm is provided at an appropriate position. A spring is provided to bias the portion downward. In addition, even if the sheet material protrudes backward from the lower blade during feeding, the pinch roller presses the sheet material from above during feeding in order to prevent the sheet from hanging down. Is provided rotatably, and a holding portion for holding the plate material from the upper side so as to be movable in the material feeding direction is provided behind the pinch roller at the tip portion of the swing arm. Here, by the above-mentioned spring,
The pinch roller is urged toward the work supporting member, and the holding portion is urged toward the lower blade.

[0005] Therefore, the plate material is supported by the work supporting member, and the feeding of the plate material is started. When the leading end (rear end) of the plate material abuts against the pinch roller due to the feeding, the leading end of the swing arm is swung upward by an amount corresponding to the plate thickness while resisting the urging force of the spring. The plate material can be made to enter between the pinch roller and the work supporting member, and the plate material can be pressed from above by the pinch roller. Further, when the plate material is fed in the feeding direction (rearward direction), the plate material enters between the holding portion and the lower blade, and the holding portion can hold the plate material from above.

After holding the plate by the holding portion, the pinch roller is rotated to feed the plate in the feeding direction, and the sheared portion of the plate is positioned at the rear end position (shear position) of the lower blade. Next, the plate material is pressed and fixed to the upper surface of the lower blade by the plate holding device. Then, by moving the upper frame up and down (lowering and raising), the upper blade and the lower blade cooperate,
The product can be taken out by shearing the sheared portion of the plate material. When a plurality of products are taken out from one sheet material, the above-described operation is performed a plurality of times.

[0007] When all shearing of one sheet material is completed, a residual material that does not become a product remains, and this residual material is held from above by a holding unit. Therefore, the holding state of the holding portion is released by kicking the front end portion of the remaining material by appropriate kicking means, and the remaining material is carried out to the rear direction of the lower blade.

[0008]

In a conventional shearing machine, when a plate material is caused to enter between a pinch roller and a work supporting member and the plate material is pressed by the pinch roller, the leading end (rear end) of the plate material is pinched. Because of the contact with the roller, the pinch roller wears significantly due to the contact of the plate material, shortening the life of the pinch roller,
There is a problem that the size of the pinch roller changes, and the feeding of the plate material cannot be sufficiently stabilized.

If the thickness of the plate material is large, the force for urging the holding portion downward by the spring increases, and even if the front end of the remaining material is kicked by appropriate kick means, the holding state of the holding portion is maintained. Is not released, and the remaining material cannot be carried out in the backward direction of the lower blade.

[0010]

According to the first aspect of the present invention, in a shearing machine for shearing a plate material by cooperation of an upper blade and a lower blade, the plate material is placed on the upper surface of the lower blade during shearing. A plate holding device for pressing and fixing the plate is provided, a work support member for supporting the plate material is provided in front of the lower blade, and a vertically movable unit is provided above the work support member so as to be vertically movable by a lifting operation device. A pinch roller that presses the plate material from above at the time of material feeding is rotatable and provided to face the work support member vertically, and the plate material can be moved in the material feeding direction vertically above the lower blade of the elevating body at the time of material feeding. A holding portion for holding the upper blade from above is provided on the lower blade so as to face vertically.

Here, the operation of the lifting / lowering operating device can be controlled so that the pinch roller presses the plate material from above immediately after the front end (rear end) of the plate material passes through the vertically lower position of the pinch roller. It is desirable that the rear end face of the holding portion and the rear end face of the lower blade be located on substantially the same plane.

According to the first aspect of the present invention,
The plate material is supported by the work supporting member, and the feeding of the plate material is started. And, by lowering the lifting body in the vertical direction by the lifting and lowering actuator in accordance with the sheet feeding situation of the plate material,
Immediately after the front end (rear end) of the plate material passes through the vertically lower position of the pinch roller, the plate material is pressed from above by the pinch roller. Further, when the plate material is fed in the material feeding direction, the plate material enters between the holding portion and the lower blade, and the plate material can be held by the holding portion from above.

After holding the plate by the holding portion, the pinch roller is rotated to feed the plate in the feed direction, and the sheared portion of the plate is positioned at the rear end position (shear position) of the lower blade. Here, by pressing the plate material from above by the pinch roller and holding the plate material from above by the holding unit, even if the plate material greatly protrudes backward with respect to the lower blade during feeding, It is possible to prevent the plate material from hanging down and to stably feed the plate material.

Next, the plate material is pressed and fixed to the upper surface of the lower blade by a plate holding device. Then, the upper blade and the lower blade cooperate with each other to shear the portion to be sheared of the plate material and take out the product.
In the case where a plurality of products are taken out from one sheet material, the above operation is repeated.

[0015] When all shearing of one sheet material is completed, a residual material that does not become a product remains, and this residual material is held from above by a holding unit. Then, the lifting state is lifted in the vertical direction by the lifting / lowering operation device, thereby releasing the holding state by the holding unit. Then, the remaining material is carried out rearward of the lower blade.

According to a second aspect of the present invention, in addition to the specific features of the first aspect, an operating force for vertically lowering the elevating body by the elevating and lowering operating device is applied to the thickness of the plate material. It is characterized by being configured to be adjustable correspondingly.

According to the second aspect of the present invention,
In addition to the action according to the first aspect of the present invention, the pressing force by the pinch roller and the holding force by the holding section can be kept substantially constant even when the thickness of the sheet material changes greatly.

[0018]

Embodiments of the present invention will be described below with reference to the drawings.

Referring to FIG. 1 and FIG. 2, a shearing machine 1 according to an embodiment of the present invention includes a pair (one in FIG. 1 and FIG. (Only shown), and the pair of side frames 3 are connected by appropriate means. An upper frame 5 is provided at an upper portion (an upper portion in FIGS. 1 and 2) between the pair of side frames 3 so as to be able to move up and down by operation of a hydraulic cylinder (not shown). Is provided with a lower frame 7. On the lower side of the upper frame 5, an upper blade 9 is provided extending in the left-right direction. On the upper side of the lower frame 7, a lower blade 11 which performs shearing in cooperation with the upper blade 9 extends in the left-right direction. It is provided.

A front frame 13 is provided between the pair of side frames 3 in front of the upper frame 5 (to the left in FIGS. 1 and 2). (Only one is shown in the drawing) for pressing and fixing the upper surface of the plate
Are provided at appropriate intervals in the left-right direction. Here, each plate holding device 15 includes a plate holding cylinder 19 having a vertically movable piston rod 17 and a plate holding member 21 provided below the piston rod 17.

A plurality of (only one is shown in the drawings) carry-in conveyors 23 (one example of a work supporting member) are provided at appropriate intervals in the left-right direction on the front side of the lower blade 11, and the carry-in conveyor 23 holds the plate material W. It is to be transported rearward while being magnetically supported. Each carry-in conveyor 23 has an endless magnetic belt 25 which can be circulated backward by driving a carry-in motor (not shown), and a plurality of electromagnets vertically sandwiched by the magnetic belt 25 and arranged at appropriate intervals in the front-rear direction. 27.

A plurality of (only one is shown in the drawing) unloading conveyors 29 are provided at the rear side of the lower blade 11 at appropriate intervals in the left-right direction. It is transported rearward in a state of being attached and supported. Each of the unloading conveyors 29 includes an endless magnetic belt 31 which can be circulated rearward by driving a unloading motor (not shown), and a plurality of magnetic belts 31 vertically sandwiched by the magnetic belt 31 and provided at appropriate intervals in the front-rear direction. An electromagnet 33 is provided.

Above the lower blade 11, a plurality of lifting members 35 (only one is shown in the drawing) are provided at appropriate intervals in the left-right direction without interfering with the plate holding device 15.
Are vertically moved by the operation of an air cylinder 37 provided on the rear side of the front frame 13. Here, a plurality of (only one is shown in the drawing) air cylinders 37 are connected to a regulator (not shown), and by manually adjusting the set pressure of the regulator, the plurality of lifting / lowering bodies 35 are vertically moved. The operating force for lowering in the direction can be adjusted according to the thickness of the plate material W. It should be noted that a high-pressure regulator and a low-pressure regulator may be connected to the plurality of air cylinders 37, respectively, and one of the regulators may be selected according to the thickness of the plate material W to automatically operate. .

A pinch roller 39 for pressing the plate material W from above at the time of material feeding is provided on each of the elevating bodies 35 so as to be vertically opposed to the corresponding carry-in conveyor 23, and each pinch roller 39 has a horizontal rotating shaft 41. Each is rotatable about the axis of. Further, a holding portion 43 for holding the plate material W from the upper side so as to be movable in the material feeding direction at the time of material feeding is provided on the rear side of the pinch roller 39 in each elevating body 35 so as to be vertically opposed to the lower blade 11. Yes, each holding part 4
The rear end face of the lower blade 3 and the rear end face of the lower blade 11 are located on substantially the same plane. It is desirable that the holding portion 43 is made of an elastic material such as urethane.

The front end (rear end) of the plate material W is pinch roller 39
The sheet material W is configured to be pressed from above by a pinch roller 39 immediately after passing through a vertically lower position (directly below position). That is, a proximity sensor 45 for detecting that the leading end of the plate material W has approached the vertically lower position of the pinch roller 39 is provided at an appropriate position of the carry-in conveyor 23, and the proximity sensor 45 is connected to the control means 47. . Control means 4
7 is configured to be able to control the operation of the plurality of air cylinders 37 so as to lower the elevating body 35 in the vertical direction when a predetermined detection is performed by the proximity sensor 45.

Next, the operation of the embodiment of the present invention will be described.

The plate material is supported by the carry-in conveyor 23,
The feeding of the plate material W is started by circulating the magnetic belt 25 by driving the carry-in motor. Then, when the leading end of the plate material W is detected by the proximity sensor 45, the operation of the plurality of air cylinders 37 is controlled by the control means 47, and the
By lowering the sheet material 5 in the vertical direction, the sheet material W can be pressed from above by the pinch roller 39 immediately after the leading end of the sheet material W has passed the vertically lower position of the pinch roller 39. Further, when the plate material W is fed in the feeding direction (backward direction), the plate material W enters between the holding portion 43 and the lower blade 11, and
The plate material W can be held from above by the holding portion 43. Here, by adjusting the operating force for lowering the lifting / lowering body 35 in the vertical direction by the air cylinder 37 in accordance with the thickness of the plate material W, even if the thickness of the plate material W changes greatly, the pressing force by the pinch roller 39 is increased. The pressure and the holding force of the holding section 43 can be kept substantially constant.

After holding the plate material W by the holding portion 43,
The sheet material W is conveyed in the sheet feeding direction by rotating the pinch roller 39 in the sheet feeding direction, and the sheared portion of the sheet material W is positioned at the rear end position (shear position) of the lower blade 11. Here, by pressing the plate material W from above by the pinch roller 39 and holding the plate material W from above by the holding portion 43,
Even if the plate W comes to protrude greatly backward with respect to the lower blade during the feeding, the plate W is prevented from hanging down,
Stable feeding of the plate material W can be performed. Next, the plate holding member 21 is lowered by the operation of the plurality of plate holding cylinders 19 to press and fix the plate W to the upper surface of the lower blade 11. At this time, the magnetic belt 31 on the unloading conveyor 29
Thus, a portion Wa (a portion that becomes a product by shearing) of the plate material W corresponding to the product is magnetically held from above. The upper frame 5 is actuated by the operation of the hydraulic cylinder.
Is lifted (lowered and raised) so that the upper blade 9 and the lower blade 11 cooperate with each other to shear the portion to be sheared of the plate material W to take out the product Wa. In addition, by repeating the above operation a plurality of times, a plurality of products Wa can be taken out by performing a plurality of shears on one product W.

When all the shearing of one sheet material W is completed, a remaining material that does not become the product Wa remains, and the remaining material is held by the holding portion 43 from above. Then, the lifting state of the lifting body 35 is raised in the vertical direction by the operation of the plurality of air cylinders 37, so that the holding state of the plurality of holding sections 43 is released. Then, the remaining material is removed from the lower blade 11 by an appropriate kicker device as shown in Japanese Utility Model Laid-Open No. 6-57515.
To the rear of the machine.

As described above, according to the embodiment of the present invention, the plate material W can be pressed from above by the pinch roller 39 immediately after the leading end of the plate material W has passed the vertical lower position of the pinch roller 39. The pinch roller 39 is prevented from hitting the front end surface of the plate material W and the pinch roller 39.
Can be suppressed, the life of the pinch roller 39 can be improved, and the plate material W can be stably fed by the pinch roller 39.

After all shearing of one sheet material is completed, a plurality of lifting / lowering bodies 35 are moved by a plurality of air cylinders 37.
Is lifted in the vertical direction and the holding state by the plurality of holding portions 43 is released, so that the remaining material can be reliably carried out to the rear of the lower blade 11.

Further, since the holding portion 43 is vertically moved integrally with the lifting / lowering body 35, the holding portion is different from the conventional art in which the holding portion swings around the hinge pin integrally with the swing arm. When the plate material W is held by the portion 43, the rear end of the holding portion 43 can be made closer to the rear end position (shear position) of the lower blade 11, and a portion corresponding to the remaining material (a portion remaining as the remaining material) is shortened. Even so, the portion corresponding to the remaining material can be held by the holding portion 43, and the amount of the remaining material can be reduced.

Further, even if the thickness of the plate material W changes greatly,
The pressing force of the pinch roller 39 and the holding force of the holding section 43 can be kept substantially constant, and the sheet feeding operation of the plate material W can be performed more stably.

[0034]

According to the first aspect of the present invention, since the plate material is pressed from above by the pinch roller immediately after the front end (rear end) of the plate material passes through the vertically lower position of the pinch roller, The abutment of the pinch roller with the front end surface of the pinch roller can be avoided, the abrasion of the pinch roller can be suppressed, the life of the pinch roller can be improved, and stable feeding can be maintained by the pinch roller. .

After all the shearing of one sheet material is completed, the elevating body is raised vertically by the elevating and lowering device to release the holding state by the holding portion. Discharge processing can be performed reliably.

Further, since the holding portion is vertically moved integrally with the lifting / lowering body, the holding portion swings around the hinge pin integrally with the swing arm as in the prior art. When holding, the rear end position of the holding portion can be made closer to the rear end position (shear position) of the lower blade, and even if the portion corresponding to the remaining material becomes shorter, the holding portion holds the portion corresponding to the remaining material. And the remaining material can be reduced.

According to the invention described in claim 2, according to claim 1
In addition to the effects of the invention described in the above, even if the plate thickness of the plate material changes greatly, the pressing force by the pinch roller and the holding force by the holding unit can be kept almost constant, and the stabilization of the sheet feeding operation of the plate material can be achieved. It can be further improved.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a shearing machine.

FIG. 2 is a side sectional view of the shearing machine, which is different from FIG.

[Explanation of symbols]

 Reference Signs List 1 shearing machine 9 upper blade 11 lower blade 15 plate holder 23 carry-in conveyor 35 elevating body 37 air cylinder 39 pinch roller 43 holding part

Claims (2)

[Claims] 1. A shearing machine for shearing a plate material by cooperation of an upper blade and a lower blade, wherein a plate holding device for pressing and fixing the plate material to an upper surface of the lower blade at the time of shearing is provided. A work supporting member that supports the plate material is provided on the side, and a vertically movable device is provided above the work supporting member so that the pinch roller that presses the plate material from above can be rotated when feeding the material to the elevating body. The work support member is provided to face vertically, and further, a holding portion for holding the plate material from the upper side so as to be movable in the material feeding direction at the time of material feeding to the elevating body is provided so as to face the lower blade vertically. Characteristic shearing machine. 2. The shearing machine according to claim 1, wherein an operating force for vertically lowering the elevating body by the elevating operation device is adjustable in accordance with a thickness of the plate material. .