JPH05123764A - 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 shaking pin 67 as shakable to right and left direction projecting from a pass line 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 press brake, for example, a work loading table is provided beside the press brake, and the work loaded on the work loading table is provided above the work loading table. Another possible work-carrying-in device is a work-carrying-in device that lifts a work piece by a single-sheet picking device, and then carries the work piece onto a lower die of the press brake by holding a work clamp which is provided on the front side of the press brake so as to be movable in the left-right direction.

In this work carrying-in device, when the work clamped by the work clamp is carried into the mold, the work clamp clamps and moves the tip of the work length, so that the rear end of the work is sagged. After being generated, it enters between the guides provided before and after the mold and is carried in and positioned on the lower mold.

[0004]

By the way, when the work is set in the mold, the work clamp is unclamped and the work clamp retracts, so that the work is dropped between the guides. 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 swinging member projecting from a pass line is provided on the front side of the mold of the bender so as to be swingable in the left and right directions to constitute a bender work loading device.

[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, a swing member protruding from the pass line is provided on the front side of the mold so that it can swing in the left-right direction, so the work is unclamped from the work clamp at the unclamp position. When the work is clamped and the work clamp is retracted, even if the work is dragged by the work clamp, the work is prevented from being dragged by the swing member. The swinging member also serves as a guide when the work is carried in.

[0010]

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

With reference to FIGS. 7 and 8, for example, a press brake 1 as a bender is provided with, for example, C-shaped side frames 3R, 3L. 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 on the front portion of the lower table 9. A guide rail 43 extending in the left-right direction in FIGS. 7 and 8 is provided on the support frame 41, and a loader 45 reciprocally movable in the left-right direction is provided on the loader guide rail 43. This loader 4
Reference numeral 5 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.

On the right side of the work clamp 47, as 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.

As shown in FIGS. 1 and 2, the loader 45 is provided with, for example, a fluid cylinder 51, and the work clamp 47 is attached to the tip of a piston rod 53 attached to the fluid cylinder 51. Installed.

A fluid cylinder 55 is provided above the work clamp 47, and a vertically movable clamp piece 57 is attached to the fluid cylinder 55.

With the above structure, when the fluid cylinder 51 is operated, the work clamp 47 is moved in the front-rear direction (left-right direction in FIG. 1) via the piston rod 53. When the fluid cylinder 55 is operated,
The clamp piece 57 descends and the work W is clamped.

On the rear side of the lower die 11 (on the left side in FIG. 1), a back gauge 59 which is positioned by abutting the rear end side of the work W is provided so as to be movable back and forth. Further, on the front side of the lower die 11, as shown in FIG. 2, a plurality of swinging devices 61 that are swingable in the left-right direction at appropriate intervals in the left-right direction are provided.

As shown in FIG. 3, the swinging device 61 has a spacer 63 attached to the front side of the lower die 11 by a plurality of bolts 65. For example, a swing pin 67 as a swing member is provided on the spacer 63 so as to project from the pass line and swing in the left-right direction via a hinge pin 69. Moreover, the upper end of the spring 71 and the lower end of the spring 71 are on the left and right sides of the swing pin 67, respectively.
It is attached to 3.

With the above structure, the back gauge 59 is moved in the front-rear direction and positioned according to the width of the work W. Then, the tip of the work W lifted by the suction pad 39 is replaced by the work clamp 47 from the suction pad 39 at the clamp position shown by the chain double-dashed line. Next, when the loader 45 is moved to the right in FIG. 2, the rear end of the work W clamped by the work clamp 47 is moved to the right while being supported on the lower mold 11 by the work sag. At this time, the work clamp 47 is moved while tilting the swing pin 67 to the right, and the rear end of the work W is moved while being positioned by the back gauge 59. The swing pin 67 is used for the work clamp 47.
After passing, the spring force returns it to its original position.

When the work clamp 47 reaches the unclamp position, the work clamp 47 is unclamped to release and hold the work W and retracted to the front side (right side in FIG. 1). When the work clamp retracts, the work W may try to be dragged by the work clamp 47 in some cases, but the work W is not displaced by being blocked by the swing pin 67, and can be easily and accurately placed on the lower die 11, and Can be positioned reliably. Moreover, the swing pin 67 can also serve as a guide for loading the work W.

When the width of the work W changes, the position of the back gauge 59 in the front-rear direction and the spacer 63
This can be dealt with by changing the dimensions of.

FIGS. 4, 5 and 6 show another embodiment which is an alternative to the above-mentioned embodiment. In this embodiment, the same parts as those in the above-mentioned embodiment are designated by the same reference numerals and only different points will be described.

That is, referring to FIGS. 4, 5 and 6, without using the back gauge 59 in the above-described embodiment, the guide plate 7 is provided on the front and rear surfaces of the lower mold 11.
3F and 73B are provided. This guide plate 7
3B is attached to the full length of the lower die 11 as shown in FIG. 5, but the guide plate 73F is attached to the right side portion of the lower die 11 as shown in FIG. It is installed short and open. The swinging device 61 is provided on the opened right side portion.

As the swinging device 61, a swinging pin 67 is attached to a front side surface of the lower mold 11 by a hinge pin 69 so as to be swingable in the left-right direction. A weight 75 is provided below the swing pin 67. By providing the weight 75, even if the swing pin 67 rotates, it is always returned to the vertical state. Therefore, the swing pin 67 in this embodiment also has the same operation and effect as those in the above-described embodiments.

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 rocking pins 67 of the rocking device 61 may be provided at an appropriate number at any position in the length direction of the lower mold 11, but in the case of the tip positioning, the work clamp 47 is provided.
It is effective to provide it near the unclamping position.

[0040]

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. By unclamping the work carried in by the work clamp into the work clamp and unclamping the work from the work clamp, and when the work clamp is retracted, the swing member is projected in the left and right directions so that it can swing in the left and right directions. It is possible to prevent the work piece from slipping and to perform accurate positioning. Further, it can also serve as a guide when the work is carried in.

[Brief description of drawings]

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

FIG. 2 is a view taken along the line II-II in FIG.

FIG. 3 is an enlarged front view of an arrow III portion in FIG.

FIG. 4 is an explanatory diagram showing another embodiment that replaces FIG.

5 is a view taken along line VV in FIG.

FIG. 6 is a front view of FIG.

FIG. 7 is a front view of a press brake embodying the present invention.

FIG. 8 is a plan view of 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 59 Back Game 61 rocking device 63 spacer 67 rocking pin (rocking member) 69 hinge pin 71 spring

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location B65H 3/08 340 9148-3F 5/08 A 7111-3F // B30B 15/30 108 7728-4E

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 is movable back and forth to clamp a work lifted by a suction pad provided in this work piece picking device, and a movable loading device that moves this work clamp. A work loading device for a bender, characterized in that a swing member projecting from a pass line is provided on the front side so as to be swingable in the left-right direction.