JPS5937303Y2 - Work support device in press brake - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a press brake, and more specifically, to a work support device in a press brake.

When pressing the press brake to bend a plate-shaped workpiece, when the upper die engages the workpiece placed on the upper surface of the lower die, the front and rear of the bending line of the workpiece rotates upward. It is bent.

When the bending process is completed, the upper mold is removed from the workpiece, and then the workpiece is taken out from the lower mold and transported to the next process, but in conventional press brakes of this type, the upper mold separates from the workpiece. Then, the workpiece falls back and forth or slips on the upper surface of the lower mold, which can cause damage to the processed product, and the work itself is dangerous.

This invention was created in view of the above problems, and provides a workpiece support device in a press brake that can prevent the workpiece from falling down after the bending process is completed, thereby making work safer. It is something to do.

Hereinafter, one embodiment of this invention will be described in detail using the drawings.

FIG. 1 shows a side view of a hydraulic press brake.

This hydraulic press brake 1 has an upper apron 7 integrally attached to the upper part of a frame 3, on which an upper die 5 can be freely attached and detached, and a lower apron (ram) 9 corresponding to the upper apron 7 at the lower part for lifting and lowering. It can be worn freely.

A lower mold 11 corresponding to the upper mold 5 is detachably attached to the upper part of the lower apron 9.

This lower apron 9 is equipped with a hydraulic cylinder (not shown).
It is raised and lowered by the operation of the

On the front side (the left side in FIG. 1) of the lower apron 9, a workpiece W placed on a conveying device (not shown) such as a roller conveyor placed near both measuring sections of the press brake 1 is pressed. A workpiece loading device 1 that acts to automatically hit the bank gauge (not shown) of the brake 1
3, and the back gauge (
A support device 15 for supporting a workpiece W positioned on the lower mold 11 of the lower apron 9 is mounted.

The workpiece loading device 13 is arranged on both sides of the workpiece supporting device 15, and is configured as shown in FIGS. 2 and 3.

That is, the support frame 1 is attached to the front side (the left side in FIG. 2) of the lower apron 9 via a plurality of bolts, etc.
7 is attached to this support frame 17 in a direction perpendicular to the longitudinal direction of the lower apron 9, that is,
A pair of guide frames 19, 19 extending in the front-rear direction are attached.

The guide frames 19.19 are connected by a continuous member 21, and this connecting member 21 is provided with a guide groove 23 in the front-rear direction at the center position.

The guide frames 19.19 support the pusher frame 25 so as to be movable in the front and rear directions.

A plurality of pusher supports 27 and 29 are protruded from the pusher frame 25 at appropriately spaced positions, and a U-shaped bracket 31 is fixed to the upper end of each pusher support 27 and 29. A base portion of a pusher 35 is supported by the bracket 31 via a support pin 33 so as to be rotatable in the vertical direction.

The pusher 35 has a so-called hook shape with a distal end bent at a right angle and a locking portion 37 integrally formed therein.

A bracket 41 of the drive cylinder 39 is attached to a support pin 43 at a lower position on the back side of each of the pusher supports 27 and 29.
It is attached so that it can swing freely.

The tip of the piston rod 45 of the drive cylinder 39 is pivotally connected to the bent portion of the pusher 35 via a pin 47, and the operation of the drive cylinder 39 causes the pusher 35 to move vertically about the support pin 33. The locking portion 37 of the pusher 35 is configured to be rotated so that the locking portion 37 of the pusher 35 is vertically projected and retracted from the horizontally supported workpiece W.

Each pusher support 27 of the pusher frame 25
．． A pair of left and right wheels 49 and 49 are rotatably mounted on a shaft 51 at the lower part of the pusher frame 29, and a pair of left and right wheels 53 and 53 are rotatably mounted on a shaft 55 at the lower part of the pusher frame 25. It is mounted on a shaft.

Then, the pusher frame 25 is connected to the guide frame 19.
, 19, the wheels 49, 49 are loosely fitted into the guide grooves 23 of the continuous members 21 of
The wheels 53, 53 are supported upwardly, and the wheels 53, 53
is supported on the lower surface of the guide frame 19.19, and the pusher frame 25 is supported by the guide frame 19.19.

A drive cylinder 51 is attached to the support frame 17 via a support pin 59.
The tip of the piston rod 61 is connected via a support pin 65 to a cylinder support 63 vertically disposed at a lower front position of the pusher frame 25.

The pusher frame 25 is configured to move in the front-rear direction along the guide frames 19, 19 by the operation of the drive cylinder 57.

The work supporting device 15 is constructed as shown in FIGS. 4 and 5.

That is, brackets 67° 69 are attached to the front side surface (left side surface in FIG. 4) of the lower apron 9 via a plurality of bolts, etc., at appropriate distances in the horizontal direction.
A bearing member 71 such as a pillow block or the like is fixed to each bracket 67, 69 via a bolt or the like, and a support shaft 73 parallel to the longitudinal direction of the lower apron 9 is rotatably supported by this bearing member 71. It is suspended.

On the front side of one bracket 67 is a drive cylinder 75.
is swingably supported via a pair of left and right support pins 77, 77.

At the tip of the piston rod 79 of the drive cylinder 75, there is a swing arm 81 whose base is fixed to the support shaft 73.
The distal end portions of are swingably connected via a connecting pin 83.

Additionally, base portions of a plurality of support arms 85, 87 extending diagonally forward and upward toward the tip are fixed to the support shaft 73, separated as appropriate.

A lower apron 9 is provided at the tip of each support arm 85, 87.
A support frame 89 extending horizontally in a direction perpendicular to the longitudinal direction of the frame is swingably supported via support pins 91. A stopper 93 is provided at the tip of the support arms 85, 87.

On the support frame 89, a plurality of rollers 95, 95, .
The button is rotatably supported by . . . and is configured so as not to damage the workpiece W.

In the above configuration, the use position of the pusher of the workpiece loading device 13 is set according to the length of the workpiece W.

For example, when the length of the workpiece W is short, the drive cylinder 39 is actuated to use the pusher 35 provided on the pusher support 27 on the side closer to the lower apron 9 (on the right side in FIG. 1). The rod 45 is extended and the pusher 35 is rotated upward to raise the locking portion 37.

Next, when the drive cylinder 57 is actuated, the piston rod 61 is shortened and the pusher frame 25 moves toward the lower Efron 9 along the guide frames 19 and 19.

As the pusher frame 25 moves, the pusher 35 moves in the same direction, and the locking portion 37 of the pusher 35 moves in the same direction.
A workpiece W placed on a transport device (not shown) by
is carried into the press brake 1, abuts against a back gauge (not shown) positioned in advance, and is positioned on the lower die 11 attached to the upper part of the lower apron 9.

The positioned workpiece W is transferred to a transport device, a button, a workpiece support device 15, etc., depending on its size.
is supported by a support frame 89.

After positioning the workpiece W, when a hydraulic cylinder (not shown) is activated, the lower apron 9 starts to rise, and the workpiece support device 15 is raised integrally with the lower apron 9 in the state of the residue 1 on which the workpiece W is placed. (The position indicated by the dashed line in FIG. 4).

The lower apron 9 is raised, and the upper mold 5 is attached to the lower part of the upper apron 7 and the lower mold 1 is attached to the upper part of the lower apron 9.
1, when the bending process of the work W is started, the drive cylinder 75 of the work support device 15 is operated to extend the piston rod 79 and rotate the swing arm 81 clockwise in FIG. 4.

This rotation of the swing arm 81 causes the support arms 85 and 87 to rotate in the same direction via the support shaft 73, and the support frame 89
rotates while supporting the workpiece W (the position shown by the two-dot chain line in FIG. 4).

When the bending process is completed, the lower apron 9 is lowered by the operation of a hydraulic cylinder (not shown), and the workpiece support device 15 is lowered together with the lower apron 9.

At this time, the support frame 89 of the workpiece support device 15 is held in the rotated state 11, so that the workpiece W is prevented from falling in the front-rear direction.

When the lower apron 9 is lowered, the drive cylinder 75 of the workpiece support device 15 is actuated to shorten the piston door 9 and rotate the swing arm 81 counterclockwise as shown in FIG.

This rotation of the swing arm 81 causes the support arms 85 and 87 to rotate in the same direction via the support shaft 73, and the support frame 8
9 rotates while holding the processed workpiece W and returns to the horizontal position.

When the work W is positioned, the work loading device 13 operates the drive cylinder 39 to shorten the technology rod 45, rotate the pusher 35 downward, and lower the locking portion 37.

Next, when the drive cylinder 57 is actuated, the piston rod 61 expands, and the pusher frame 53 moves along the guide frames 19, 19 toward the side away from the lower apron 9, and returns to its original position.

As can be understood from the above description of the embodiments, the gist of the present invention is to automatically carry out loading and positioning of the workpiece to the press brake, since the structure is as described in the claims of the utility model registration. I can do it.

It is possible to prevent the workpiece from collapsing after being bent or folded, thereby improving work safety.

It should be noted that this invention is not limited to the above-mentioned embodiments, and can be implemented in modes other than the above-mentioned embodiments.

In addition, in the claims section of the utility model registration, codes are written for convenient comparison with the drawings, but these codes do not limit the technical scope of this invention.

[Brief explanation of drawings]

The drawing shows one embodiment of this invention, and shows the first embodiment of the invention.
The figure is a side view of a press brake equipped with the device according to this invention, Figures 2 and 3 are side and front views of the workpiece loading device, and Figures 4 and 5 are side views of the workpiece support device. and a front view. Explanation of symbols representing the main parts of fixed objects, 5...
Upper mold, 7... Upper apron, 9... Curved lower apron, 11... Lower mold, 13... Work carrying device,... Work supporting device. 15...

Claims (1)

[Scope of utility model registration request] A lower apron 9 is provided with a lower die 11 at the upper part that bends the workpiece in cooperation with an upper die 5 attached to the lower part of the upper apron 7, and the workpiece positioned on the lower die 11 is supported horizontally. A support frame 89 is provided on one side of the lower apron 9 so as to be rotatable in the vertical direction, and a drive device is provided to rotate the support frame 89 upward following the bending of the workpiece. , the pusher frame 25 attached to one side of the lower apron 9 is attached to the lower die 11.
The pusher frame 25 is provided so as to be reciprocally movable in a direction crossing the longitudinal direction, and a drive device is provided for reciprocating the pusher frame 25, holding a part of the work horizontally supported by the support frame 89 and moving the work into the lower mold. Pushers 35 for moving the workpiece in the direction 11 are mounted on an appropriate number of locations on the pusher frame 25, and the pusher 35 is moved between the raised position where the pusher 35 engages the workpiece supported horizontally on the support frame 89 and the workpiece. A work support device for a press brake, characterized in that it is provided so as to be movable up and down to a lowered position avoiding interference, and is also provided with a drive device for moving a pusher 35 up and down.