JPH05123763A - Work carrying-in device for bender - Google Patents

Abstract

PURPOSE:To execute the precise positioning by preventing the dragging of a work with the retreat of a work clamp at the time of carrying the work clamped with the work clamp in a press brake to set the work on a die. CONSTITUTION:This device is composed of a work piling table 15 arranged at near the press brake 1 and storing the works W in the piling condition, a work one sheet take-up device 17 arranged above this work piling table 15 and providing an attracting pad 39 as vertically movable, the work clamp 47 as shiftable to front and back for clamping the work W held up with the attracting pad 39 provided in this work one sheet take-up device 17 and a loading device 19 as shiftable for shifting this work clamp 47. Further, this device arranges a work dragging prevention member 61 as withdrawable at the front side of the lower die 11 in the press brake 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work loading device for a bender for picking up works loaded on a work loading table one by one and loading them into a vendor.

[0002]

2. Description of the Related Art When a work is automatically loaded into a conventional bender, for example, a work loading table is provided next to a press brake, and the work loaded on the work loading table is provided above the work loading table. A work carry-in device is conceivable in which the work is lifted by a single-sheet take-up device, and the work clamp is provided on the front side of the press brake so as to be movable in the left-right direction, and the work is carried into the lower die of the press brake.

In this work loading device, when the work clamped by the work clamp is loaded on the lower die,
Since the work clamp clamps the tip of the work length and moves it, the back end of the work is sagged and enters between the guides provided before and after the lower mold and is carried in and positioned on the lower mold. Will be done.

[0004]

By the way, when the work is set on the lower die, the work clamp is unclamped and the work clamp is retracted, so that the work is dropped between the guides. The guide serves not only for positioning the work, but also as a stopper for preventing the work from being dragged when the work clamp retracts.

However, when the length of the work becomes shorter, the amount of the work caught on the guide decreases, and the work is dragged along with the retraction of the work clamp, so that the work is not properly dropped between the guides. There is a problem that positioning is not possible.

Further, if the height of the guide is increased and the amount of catching of the work is increased, it interferes with the work clamp, so that there is a problem that the height of the guide cannot be increased.

In order to solve the above problems, an object of the present invention is to prevent a work from being dragged when the work clamped by a work clamp is loaded and set on a mold. (EN) It is an object to provide a work loading device for a vendor that can perform accurate positioning.

[0008]

In order to achieve the above object, the present invention provides a work loading table which is provided in the vicinity of a bender and which stocks work in a loaded state.
A single-workpiece picking device provided above the work loading table and having a vertically movable suction pad, and a back-and-forth movable workpiece that clamps the lifted work by the suction pad provided in the single-workpiece picking device. A clamp,
It comprises a movable loading device for moving the work clamp, and a work slipping-in prevention member is provided on the front side of the die of the bender so as to be retractable so as to constitute a work loading device for the bender.

[0009]

By adopting the work loading apparatus for the bender of the present invention, the work on the uppermost layer of the work loaded on the work loading table is sucked by lowering the suction pad, and further raised by the suction pad. Can be lifted. The lifted work is clamped by the work clamp, and the work clamp is moved by the loading device. Thus, the work clamped by the work clamp is set on the mold.
When the work is set on the mold, when the work retracting member is projected from the submerged state,
The work clamp is unclamped and retracted. Therefore, even if the work is to be dragged when the work clamp retracts, the work is prevented from being dragged by being blocked by the work shift preventing member.

[0010]

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

3 and 4, the press brake 1 as a bender is provided with, for example, C-shaped side frames 3R, 3L, and the front side of the upper part of the side frames 3R, 3L is illustrated. An upper table 5 is provided which is moved up and down by a omitted fluid cylinder or the like. At the lower part of the upper table 5, for example, an upper mold 7 for molding having a convex shape is provided via an upper holder.

A lower table 9 is fixedly provided on the front side of the lower portions of the side frames 3R and 3L. On the upper part of the lower table 9, for example, a lower mold 11 for molding having a concave shape is provided via a lower mold holder.

With the above structure, when the workpiece W to be processed is carried in and positioned on the lower mold 11 provided on the lower table 9, the upper table 5 is moved up and down to move the upper mold 7 to the upper mold 7. The work W is subjected to forming processing (bending processing) in cooperation with the lower mold 11.

On the left side of the lower table 9, a work stacking table 15 in the work carry-in device 13 is arranged, and above the work stacking table 15, a single-piece picking device 17 is provided. A loading device 19 is provided at the front part of the lower table 9.

A work unloading device 21 is separately arranged on the right side of the lower table 9. The work unloading device 21 is composed of, for example, a movable box-shaped product stocker 23 having an open top.

A plate material separating device 25 for separating the works W is provided near the lower table 9 side on the work stacking table 15, and a plurality of guide poles 27 are provided so as not to shift when the works W are stacked. It is erected so that the loaded works W are well aligned.

A support frame 29 of the work piece picking device 17 is attached to the left side of the lower table 9 and extends in the vertical direction. A vertical fluid cylinder 31 is attached to an upper frame 29U of the support frame 29, and a suction frame 35 is provided at a lower end of a piston rod 33 mounted on the vertical fluid cylinder 31. A suction pad 39 is attached to the lower portion of the suction frame 35 via a plurality of suction rods 37.

With the above structure, the upper and lower fluid cylinder 31
Is activated, the suction frame 35 is vertically moved via the piston rod 33. Since the suction pad 39 is attached to the suction frame 35 via the suction rod 37, the suction pad 39 is moved up and down.

As a result of the vertical movement of the suction pad 39, the work W of the uppermost layer among the works W stacked on the work stacking table 15 is sucked onto the suction pad 39 and the plate material separating device is operated one by one. It will be separated and lifted by the action of 25.

A supporting frame 41 of the loading device 19 is provided at the front of the lower table 9. A guide rail 43 extending in the left-right direction in FIGS. 3 and 4 is provided on the support frame 41,
A loader 45 is provided on the loader guide rail 43 so as to be reciprocally movable in the left-right direction. The loader 45 is connected to a drive motor (not shown), and the loader 45 is provided with a work clamp 47 so as to be movable back and forth.

With the above structure, when the drive motor is driven, the loader 45 is moved in the left-right direction along the loader guide rail 43. Therefore, the work clamp 47 is reciprocated between the unclamp position shown by the solid line and the clamp position shown by the two-dot chain line.

The right side of the work clamp 47 is shown in FIG.
As shown in FIG. 3, a push-out pusher 49 for pushing out the product processed by the press brake 1 to the product stocker 23 is provided.

The work W is lifted one by one from the work W loaded on the work loading table 15 and carried into the press brake 1, and the press brake 1 performs bending work until the product is carried out to the product stocker 23. The operation of will be described.

A work W is loaded on the work loading table 15 in advance. The suction pad 39 descends and sucks the uppermost work W of the works W stacked on the work stacking table 19. Then, when raising the suction pad 39 that has adsorbed the work W, the plate material separating device 25 is operated to be well separated from the next work W and only one sheet is lifted.

Workpiece W lifted by suction pad 39
Since the work clamp 47 is previously waiting at the clamp position indicated by the chain double-dashed line, when it is clamped by the work clamp 47, the suction holding of the suction pad 39 is released, and the loader 45 is moved to the right side in FIG. When the work clamp 47 reaches the unclamp position indicated by the solid line, the work W is unclamped and the work W is set on the lower mold 11.

The work W set on the lower die 11 is moved up and down by the upper table 5 so that the upper die 7 and the lower die 11 cooperate to start bending. When this bending process is started, the work clamp 47 returns to the clamp position, and the next work W is lifted by the suction pad 39 and replaced by the work clamp 47 as described above.

When the bending process is completed and the upper table 5 is raised, the next work W is clamped by the work clamp 47 and carried in by the loader 45, and the upper table 5 reaches the rising end. At about the same time,
The work clamp 47 reaches the unclamp position and is unclamped. The processed product is pushed out by the delivery pusher 49 while being transferred to the product stocker 23 while the work clamp 47 that clamps the next work W moves from the clamp position to the unclamp position. By repeating the above steps, the work W is continuously and automatically bent.

Before and after the lower mold 11, as shown in FIGS. 1 and 2, guide plates 51F, which serve as guides for positioning the work W on the lower mold 11,
51B is attached by extending in the left-right direction. Also,
The loader 45 is provided with, for example, a fluid cylinder 53, and the work clamp 47 is attached to the tip of a piston rod 55 attached to the fluid cylinder 53.

A fluid cylinder 57 is provided above the work clamp 47, and a vertically movable clamp piece 59 is attached to the fluid cylinder 57.

With the above construction, when the fluid cylinder 53 is operated, the work clamp 47 is moved in the front-rear direction (left-right direction in FIG. 1) via the piston rod 55. When the fluid cylinder 57 is operated,
The clamp piece 59 descends and the work W is clamped.

As shown in FIG. 2, a preventive pin 63 of the work deviation preventing member 61 is provided in the vicinity of the unclamp position of the work clamp 47 so as to be retractable from the pass line. More specifically, as shown in FIG. 1, a fluid cylinder 65 is provided on the support frame 41 near the lower mold 11 side, and a piston rod 67 mounted on the fluid cylinder 65 The prevention pin 63 is attached to the tip.

With the above structure, when the fluid cylinder 65 is operated, the prevention pin 63 is projected / retracted from the pass line via the piston rod 67.

Therefore, the tip of the work W lifted by the suction pad 39 is held by the suction pad 39 to the work clamp 47 at the clamp position. Then, when the loader 45 is moved to the right in FIG. 2, the rear part of the work W clamped by the work clamp 47 is guided by the guide plates 51F and 51B provided before and after the lower mold 11 by the work sagging while the lower metal mold is being guided. It is supported by the mold 11 and moved to the right. And work clamp 47
When reaches the unclamp position, the prevention pin 63 of the work pulling prevention member 61 is projected above the pass line. Next, when the fluid cylinder 57 is operated and the clamp piece 59 is raised, the work W is unclamped. When the fluid cylinder 53 is further operated, the work clamp 47 is retracted (right side in FIG. 1) via the piston rod 55. When the work clamp 47 moves backward, the work W may be prevented from being dragged by the prevention pin 63 even if the work W may be dragged. Then, the work W is guided by the guides 53F and 53F.
It falls between B and it is positioned. This prevention of deviation of the work W is very effective when the work W has a short length.

The present invention is not limited to the above-described embodiments, but can be implemented in other modes by making appropriate changes. Although the workpiece W is positioned at the right end of the lower mold 11 in the above-described embodiment, it may be positioned at the center of the lower mold 11. Further, the position of the work deviation preventing member 61 may be provided at any position in the length direction of the lower mold 11, but in the case of the tip positioning, it is effective to provide it near the unclamp position of the work clamp 47. Is.

[0035]

As can be understood from the above description of the embodiments, according to the present invention, since the construction is as set forth in the claims, the workpiece lifted by the suction pad is clamped by the work clamp. It is possible to prevent the work from slipping by unclamping the work carried into the work clamp by the work clamp and unclamping the work from the work clamp, and by protruding the work deviation prevention member when retracting the work clamp. You can
Accurate positioning can be performed.

[Brief description of drawings]

FIG. 1 shows a main part of the present invention, and is indicated by II in FIG.
It is an enlarged view along a line.

FIG. 2 is a plan view showing a lower die and a work clamp portion.

FIG. 3 is a front view of a press brake embodying the present invention.

FIG. 4 is a view taken along the line IV-IV in FIG.

[Explanation of symbols]

 1 Press Brake (Bender) 5 Upper Table 7 Upper Die 9 Lower Table 11 Lower Die 13 Work Loading Device 15 Work Loading Table 17 Work Single Picking Device 19 Loading Device 35 Suction Frame 39 Suction Pad 45 Loader 47 Work Clamp 51F, 51B Guide plate 61 Workpiece deviation prevention member 63 Prevention pin

Claims (1)

[Claims] 1. A work loading table provided near a bender for stocking work in a loaded state, and a work single-piece picking device provided above the work loading table and provided with a vertically movable suction pad. , A work clamp that clamps a work lifted by a suction pad provided in the work piece picking device and a movable loading device that moves the work clamp. A work loading device for a bender, wherein a work slippage prevention member is provided on the front side so as to be retractable.