JPH01122619A - Plate stock supporting device in press brake - Google Patents

Abstract

PURPOSE:To facilitate the control of a plate supporting device and to make the composition simple by providing upper and lower turning members on right and left moving bases, providing a reversal shaft orthogonal with a revolving shaft on the front and rear moving base supported by this turning member and equipping a clamp arm on this reversal shaft. CONSTITUTION:A plate is held on a clamp arm 73, a reversal shaft 63 is rotated and the upper and lower parts of the plate are reversed, and a revolving shaft 61 is rotated to revolve the plate horizontally around the revolving shaft 61 and the front and rear reversal is performed. The bending position of plural places of the plate can be indexed with holding the plate on the clamp arm 73. The right and left positioning is executed by moving the right and left moving base 21 and the positioning is executed by abutting the plate to a backgage by moving a front and rear moving base 51 reciprocatively. At bending time an up-and-down turning member 33 is turned upward to support the plate by following up to the spring-up of the plate. The turning member 33 is turned in the vertical direction centering around the vicinity of the shoulder part of a lower die. The need for simultaneously controlling plural axes is thus eliminated, the control is easy and also the composition can be simplified as well.

Description

Detailed Description of the Invention [Object of the Invention] (Industrial Field of Application) The present invention relates to a device for supporting a plate material to be bent by a press brake, and more particularly, to a device for supporting a plate material to be bent by a press brake, and more specifically to a device for supporting a plate material that is bent back and forth and The present invention relates to a plate support device that can easily be turned upside down.

(Prior Art) Conventionally, when bending a plate material using a press brake, the plate material jumps up significantly, and when the bending is completed, there is a risk that the jumped portion will fall due to its own weight. Therefore, a support device is used that supports the plate material by following the upward movement of the plate material during the bending process.

In addition, in the past, in order to automate the supply of plate materials to the press brake and the delivery of products after bending,
The configuration is such that an industrial [] pop-up is placed in front of the press brake.

(Problems to be Solved by the Invention) Conventional support devices that support a board by following the upturn of the board were developed for large boards;
Since it merely supports the plate material, there is a problem in fully automating the bending process when the plate material is relatively small and has a relatively large number of bending parts.

Further, in a configuration using an industrial robot, although automation is easy, the industrial robot itself is expensive, so there is a problem that the overall price is high.

Furthermore, it is necessary to control a plurality of axes at the same time in order to follow the bounce of the plate material during bending, making the control complicated and requiring a lot of time for teaching.

The present invention has been made in view of the above-mentioned conventional problems, and is a control system that does not necessarily require simultaneous control of multiple axes when automatically bending multiple locations on a plate using a press brake. The present invention aims to provide an easy-to-use plate material support device.

[Structure of the Invention] (Means for Solving the Problems) In order to solve the conventional problems as described above, in the present invention, a lower mold in the press brake is mounted on a left-right movable table disposed on the front side of the press brake. A vertically movable member that can freely rotate in the vertical direction around the shoulder of the machine is supported and provided,
A vertical pivot shaft is rotatably supported on a back-and-forth movable table supported by this vertically moving member so as to be movable back and forth, and a horizontal reversal axis perpendicular to the pivot shaft is rotatably supported on the pivot shaft. The reversing shaft is provided with a crank arm that can freely grip the plate material.

(Function) In the above configuration, when the plate is gripped by the clamp arm, the plate can be turned upside down by rotating the reversing shaft, and by rotating the pivot, the plate can be rotated around the pivot. It can be pivoted horizontally and reversed forward and backward. That is, while the clamp arm holds the plate material, it is possible to index the bending positions at a plurality of locations on the plate material to positions corresponding to the press brake.

Furthermore, with the above configuration, by moving the left-right movable table in the left-right direction, the plate material can be positioned in the left-right direction, and by moving the back-and-forth moving member back and forth, the plate material can be brought into contact with the bank gauge, and the plate material can be moved back and forth. Directional positioning can be performed. When the bending process is started after positioning the plate material, by rotating the vertically moving member upward, the plate material can be supported by following the springing up of the plate material during the bending process.

In other words, even when feeding plate material to a press brake and automatically bending it, there is no need to control multiple axes at the same time, making control easier and the configuration relatively simple. It is something that becomes something.

(Example) Referring to FIGS. 1 and 2, in the present example, the press brake 1 includes an upper mold 7 mounted on an upper frame 5 fixed to the upper side of a C-shaped frame 3, and an upper mold 7 mounted on the upper frame 5. An example is a type of press brake in which a lower die 11 is attached to the upper part of a ram 9 which is provided on the lower side opposite to the ram 9 so as to be movable up and down.

That is, a case will be described in which the present invention is applied to a press brake 1 of a type in which a plate material W is bent by raising a lower mold 11. However, the present invention can be easily applied not only to a press brake as described above but also to a type of press brake in which the upper mold 7 is lowered (a type in which a ram is disposed on the upper side).

Referring to FIGS. 1 to 3, the plate support device 13 according to this embodiment is arranged on the front side of the press brake 1 (on the right side in FIG. 1). More specifically, on the front side of the press brake 1, an elevating base 15 is provided which is integrally attached to the ram 9 and moves up and down integrally with the ram 9.
A plate support device 13 is supported on this elevating base 15.

The lifting base 15 need only move up and down integrally with the ram 9, but may be provided separately from the ram 9 if it is configured to move up and down in synchronization with the ram 9 by a separate drive device. It is something. Further, in the case of a type of press brake 1 in which a ram is disposed on the upper side and the upper die is moved up and down, the elevating base 15 may be fixed at an appropriate position.

A guide member 17 extending in the left-right direction is attached to the elevating base 15, and a rack rod 19 is attached thereto, and a left-right moving table 21 is supported on the guide member 17 so as to be movable in the left-right direction.

A first control motor 23 is attached to the left-right moving table 21, and a pinion 25 rotated by the first control motor 23 meshes with the rack rod 19. Therefore, by rotating the first control motor 23, the left-right moving table 21 is moved in the left-right direction.

Although detailed illustration is omitted, the left and right moving table 21 includes a lower mold 1
In order to accommodate changes in height due to replacement of the link base 29, the link base 29 is mounted so as to be vertically adjustable via a vertical guide member 27. A vertically moving member 33 is supported on the link base 29 via a link mechanism 31 so as to be rotatable in the vertical direction.

The link mechanism 31 functions to rotate the vertically moving member 33 in the vertical direction around the shoulder portion 118 of the lower mold 11 . In the link mechanism 31,
11. The base is pivoted to the link base 29. 2nd link 3
5.37 each has a 3rd. Fourth link 39.
41 is pivotally connected to the third. Fourth link 39.
The tip of 41 is pivotally connected to the vertically moving member 33.

The first . Second link 35.
A straight line passing through the pivot points P and Q of 37 and the 3rd. The straight line passing through the pivot points R and S of the fourth link 39.41 intersects near the shoulder 11S of the lower die 11.

In order to extend and retract the link mechanism 31, a swing bracket 43 is provided which is swingably supported on the link base 29. A nut member 47, which is swingably supported by the first link 35, is screwed into the threaded rod 45 so that its position can be adjusted. In addition, the swing bracket 4
3 is equipped with a second control motor 47, and the second control motor 47 and the screw rod 45 are interlocked and connected via a suitable transmission device 49 such as a pulley or a timing belt.

Therefore, by appropriately controlling and driving the second control motor 47, the link mechanism 31 is operated to expand and contract as appropriate.
The vertically moving member 33 is rotated in the vertical direction around the shoulder portion 118 of the lower die 11 .

A longitudinally movable table 51 is supported by the vertically moving member 33 so as to be movable in the longitudinal direction (horizontal direction in FIG. 1). In order to move this back-and-forth moving table 51, a screw rod 53 in the front-back direction is rotatably supported on the vertically moving member 33, and a nut member 55 movably screwed onto this screw rod 53 moves back and forth. It is attached integrally to the stand 51. Further, a third control motor 57 is attached to the vertically moving member 33, and the control motor 57 and the screw rod 53 are interlocked and connected via a transmission device 59 consisting of a pulley, a timing belt, etc. .

Therefore, by appropriately controlling and driving the third control motor 57, the back and forth moving table 51 can be moved in the back and forth direction.
Moreover, it can be positioned at any desired position.

A vertical pivot shaft 6, 1 is rotatably supported on the back-and-forth movable table 51, and the pivot shaft 6,
A reversing shaft 63 extending in a direction perpendicular to the axis of FIG. 1 is rotatably supported. In order to rotate the pivot shaft 61,
A fourth control motor 65 is attached to the back-and-forth moving table 51, and the fourth control motor 65 and the pivot shaft 61 are interlocked and connected via a suitable transmission device 67 such as a bevel gear.

Therefore, by appropriately controlling and driving the fourth control motor 65, the turning shaft 61 is appropriately rotated, and the directionality of the reversing shaft 63 supported by this turning shaft 61 is changed to an appropriate direction such as front and rear, left and right. It will be done.

In order to rotate the reversing shaft 63, a fifth control motor 69 is mounted on the turning shaft 61, and the fifth control motor 69 and the reversing shaft 61 are appropriately connected.

As shown in FIGS. 2 and 4, a support arm 71 extending in a direction parallel to the axis of the reversal shaft 63 is fixed at an eccentric position of the reversal shaft 63. A lamp arm 73 is supported so that the plate material W can be gripped freely. The clamp arm 73 includes an upper arm 75 and a lower arm 77.
5 is configured to move up and down with respect to the lower arm 77.

More specifically, as shown in FIG.
A fluid pressure cylinder 79 and a guide pipe 8 are installed on the base side of 7.
1 is integrally attached to the guide pipe 81, and the base of an upper arm 75 is guided and supported in a vertically movable manner. The tip of the piston rod 83 provided in the fluid pressure cylinder 79 passes through the guide vibe 81 and is connected to a lid member 85 provided integrally with the base of the upper arm 75. Therefore, by appropriately operating the fluid pressure cylinder 79, the upper arm 75 is moved up and down. Although not shown, the upper arm 75 is restricted from rotating around the guide pipe 81.

The clamp arm 73 is supported so as to be movable back and forth and to the left and right via an arm support device 87 attached to the tip end of the support arm 71, and a lower clamp 89 is attached to the arm support device 87. An upper clamp 91 is provided at the tip of the upper arm 75 opposite to the lower clamp 89 so as to be swingable as appropriate. Therefore, by moving the upper arm 75 up and down as described above, the plate material W can be gripped by the upper and lower clamps 91.89.

Referring to FIGS. 5 and 6, the arm support device 87
is a first member provided movably in the longitudinal direction of the support arm 71.
The first slide block 93 is placed on the slide block 93.
A second slide block 95 is provided which is movable in a direction perpendicular to the second slide block 95, and the lower clamp 89 and the lower arm 77 are rotatably supported on the second slide block 95.

More specifically, a guide block 97 (see FIG. 6) in the longitudinal direction of the support arm 71 is provided on the distal end side of the support arm 71, and the first slide block 93 is movably attached to this guide block 97. Supported. 1st above
Brackets 99A and 99B are attached to both ends of the slide block 93 in the moving direction, and one pin 10 is movably supported on a spring seat member 101 fixed to the support arm 71 on one bracket 99A.
The head of 3A is in contact. A coil ring 105A is elastically loaded between the head of the one pin 103A and the spring seat 101, and the one pin 103A is
The support arm 71 is biased toward the base. Similarly,
The other pin 103B, which is biased toward the distal end of the support arm 71 by a coil spring 105B (see FIG. 6), is in contact with the other bracket 99B due to its symmetrical configuration.

Therefore, the first slide block 93 is biased leftward and rightward in FIG. 5, and is normally located at an intermediate position.

A guide member 107 is integrally attached to the upper surface of the first slide block 93 in a direction perpendicular to the moving direction of the first slide block 93.
07, a second slide block 95 is movably supported. Although detailed explanation will be omitted since it is redundant, the second slide block 95 is similar to the first slide block 93.
The coil springs 109A, 109B (
(see FIG. 5), it is biased leftward and rightward in FIG. 6. Under normal conditions, it is located at an intermediate position.

As already understood, in the arm support device 87, when an external force, impact, etc. in the left and right direction is applied in FIGS. 5 and 6, one of the coil springs 105Δ,
105B, 109A, and 109B are compressed to absorb shock and the like.

As is clear from FIG. 6, a cylindrical bearing block 111 is attached to the upper part of the second slide block 95, and the lower clamp 89 is rotatably supported on this bearing block 111 via a bearing. ing. The lower arm 77 is fixed to the lower clamp 89 with bolts or the like. Furthermore, the bearing block 11
1, a bracket 113 is attached to the lower clamp 89, as shown in FIG. A ball plunger 115 with a ball (not shown) is attached.

The ball plunger 115 functions to always maintain the support arm 71 and the clamp arm 73 in a predetermined positional relationship, and also allows the clamp arm 73 to rotate when a large external force is applied to the clamp arm 73. It functions as expected.

Referring again to FIG. 4, the support arm 71 is provided with a fixing device 117 that fixes the lower arm 77 immovably. That is, a fluid pressure cylinder 119 is attached to the support arm 71, and this fluid pressure cylinder 119
At the tip of the piston rod 121 provided for
1A is formed.

Therefore, by operating the fluid pressure cylinder 119 to engage the engaging portion 121A of the piston rod 121 with the engaging hole 77H of the lower arm 77, the lower arm 77 is fixed in an immovable state. Therefore, it is possible to move the plate material W by a large amount in the front, rear, left and right directions, or to invert the plate material W in a stable manner.

Referring again to FIGS. 1, 2, and 3, a temporary gripping device w123 that can temporarily grip the plate material W is provided at an appropriate side of the press brake 1. This-
The gripping device 123 has a temporary gripping function when the clamp arm 73 changes its grip on the plate material W, and has a lower arm 125 and an upper arm 127. includes a clamp jaw 131 that is moved up and down by a fluid pressure cylinder 129.

Therefore, in the negative gripping device 123, the plate material W can be grasped by pressing and fixing the plate material W to the lower arm 125 with the clamp jaws 131.

In the above configuration, as shown in FIG.
When the central part of the plate material W is gripped by the crank arm 73, the plate material W is moved by driving the first control motor 23 to move the left-right moving table 21 in the left-right direction.
Positioning is performed in the left and right direction. After positioning the plate material W in the left-right direction, the fixation of the lower arm 77 by the fixing device 117 is released, and the third control motor 5
7 to move the back-and-forth moving table 51 backward (upward in FIG. 3), and bring the rear edge A of the plate material W into contact with a bank gauge (not shown) positioned in advance in the press brake 1. Accordingly, the positioning of the plate material W in the front-rear direction is performed.

As mentioned above, when the plate material W contacts the back gauge, the shock is generated by the appropriate coil spring 105A.

105B, 109A, and 109B are compressed and absorbed. In addition, the plate material W is pressed against the bank gauge by the action of the coil spring, so that the plate material W can be accurately brought into contact with the bank gauge.

If the rear edge A of the plate material W is slightly inclined in the front-rear direction with respect to the back gauge, lower arm 77
is slightly swung so that the rear edge A of the plate material W is brought into precise contact.

After the plate material W is positioned by contacting the back gauge, the ram 9 is raised in the press brake 1, and the plate material W is bent.

As described above, when the ram 9 rises and the plate material W comes into contact with the upper die 7, and a pressure increase in the hydraulic cylinder that raises the ram 9 is detected, the fluid pressure cylinder 79 is actuated to move the clamp arm. The grip of the plate material W by 73 is released. At the same time, the second control motor 47 is driven to control the link mechanism 31.
is activated to extend, and the vertically moving member 33 is rotated upwardly to follow the springing up of the plate material W.

After the bending of the plate material W is completed, the plate material W is gripped again by the clamp arm 73, and then returned to the state before the start of bending. Then, by bringing the plate material W into contact with the back gauge again and positioning it, two locations near the rear edge A of the plate material W can be continuously bent.

Further, after appropriately returning the back and forth moving table 51 so that the plate material W separates from the lower die 11, the fifth control motor 69 is activated to rotate the reversing shaft 63, thereby reversing the plate material W upside down. The vicinity of the edge C can be bent in the opposite direction.

Furthermore, by driving the fourth control motor 65 and rotating the pivot shaft 61, the edge B or the edge C of the plate material W can be made to correspond to the press brake 1. Note that when the pivot shaft 61 is rotated, it is necessary to move the left-right moving table 21 in the left-right direction and to reposition the plate material W in the left-right direction.

As already understood, the edges Δ, B of the plate material W.

The bending process on the C side can be performed continuously, including turning the plate material W in the opposite direction by reversing the lower part F.

When bending the edge side of the plate material W, the pivot shaft 61 is rotated to make the plate material W correspond to the temporary gripping device 123. Close. Then, by gripping again from a direction other than the edge side, the edge side of the plate material W can be bent.

After the bending process of the plate material W has been completed, the product can be easily transported by moving the left-right moving table 21 rightward, for example, and transporting the product onto a conveyor or pallet for the next process.

It should be noted that the present invention is not limited to the above-described embodiments, but can be implemented in other aspects by making appropriate changes.

(Effects of the Invention) As can be understood from the above description of the embodiments, according to the present invention, even when positioning a plate with respect to a press brake or following up the bounce of a plate during bending, it is possible to Since there is no need to control multiple axes at the same time, it is easy to control the plate support device, and
The configuration is also relatively simple.

[Brief explanation of the drawing]

FIG. 1 is a side view of the apparatus according to this embodiment, FIG. 2 is a front view, and FIG. 3 is a plan view of FIG. 2 showing the main parts. 4 is an enlarged cross-sectional view of the main part in FIG. 2, FIG. 5 is an enlarged view of the main part in FIG. 4, and FIG. 6 is a right side view of FIG. 5.

Claims (3)

[Claims] (1) On the left and right moving table placed in front of the press brake,
A vertically movable member that is rotatable in the vertical direction is supported around the shoulder of the lower mold in the press brake, and a vertically movable table that is supported by the vertically movable member so as to be movable back and forth is used to rotate in the vertical direction. A shaft is rotatably supported, a reversing shaft in the left and right direction orthogonal to the revolving shaft is rotatably supported on the revolving shaft, and the reversing shaft is provided with a crank arm capable of gripping the plate material. A plate support device for a press brake, characterized by: (2) In the press brake according to claim 1, wherein the clamp arm is supported so as to be movable back and forth and to the left and right and to be swingable at the tip of the support arm fixed to the reversing shaft. Board support device. (3) The support arm is provided with a fixing device for fixing the clamp arm.
The plate material support device in the press brake described in 2.