JPH05123761A - Work carrying-in device for bender - Google Patents

Abstract

PURPOSE:To easily and precisely position a work while attracting the end surface of the work with a magnet by arranging a positioning device as movable to the front and the back providing the magnet for attracting the end surface of the work at the tip end, at the back side of a die in a bender. CONSTITUTION:A work at the most upper layer of the works W piled on a work piling table is held up with an attracting pad. The work held up is clamped with a work clamp 47 and also the work clamp is shifted with a loading device. Then the work clamped with the work clamp is set on the die 11. The magnet 63 provided at the tip part of the positioning device 59 is positioned according to the width size of the work W. By this method, even if some slippage is developed to the work W dropped on the die, the end surface of the work is attracted to the magnet by the exciting action of the magnet 63 and can easily and precisely be positioned.

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. 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 lateral direction.

In this work loading device, when the work clamped by the work clamp is loaded on the lower die,
Since the work clamp clamps and moves the tip of the work length, 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 placed on the lower mold. Be positioned.

[0004]

By the way, in order to carry in and position the work on the lower die, guides are attached to the front and rear sides of the lower die to position the work. Each time the width of changes,
It is necessary to change the size of the spacer provided between the guide and the mold so that the width of the work and the distance between the guides are the same, which is very troublesome and troublesome.

In order to solve the above problems, an object of the present invention is to easily carry out setting and positioning of a work by a work clamp in a work loading device even if the width of the work changes. Another object of the present invention is to provide a work loading device for a vendor, which enables accurate positioning and prevents the occurrence of defective products and the deterioration of product accuracy.

[0006]

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.
The work piece picking device provided above the work loading table and provided with a vertically movable suction pad, and the work clamp for clamping the lifted work piece by the suction pad provided in the work piece picking device are the bender. It consists of a movable loading device that can be moved to
On the rear side of the die of the bender, a front-back movable positioning device having a magnet for attracting the end face of the work at the tip was provided to constitute a work-working-in device for the bender.

[0007]

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, the positioning device provided on the rear side of the mold is moved in the front-back direction to position the magnet provided at the tip of the positioning device according to the width dimension of the work. In this way, even if the work dropped on the die is misaligned, the end face of the work is attracted by the magnet due to the magnetizing action of the magnet, and the work is easily and accurately positioned.

[0009]

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 and 3L, and the front side of the upper part of the side frames 3R and 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 work 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 work single-sheet 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 supporting frame 29 of the work single-sheet picking device 17 is attached to the left side of the lower table 9 and extends vertically. 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.

The top and bottom workpieces W among the workpieces W stacked on the workpiece stacking table 15 are attracted to the suction pads 39 by the vertical movement of the suction pads 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 side 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 dotted 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 works W are lifted one by one from the works W stacked on the work stacking 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 started to be bent by the upper die 7 and the lower die 11 in cooperation with each other when the upper table 5 is moved up and down. 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 lifted, 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 FIG. 1, the loader 45 is provided with a fluid cylinder 51, and a piston rod 53 mounted on the fluid cylinder 51 has a piston rod 53 having a tip (the left end in FIG. 1) at which the workpiece is mounted. A clamp 47 is attached. A fluid cylinder 55 is provided above the work clamp 47, and a clamp piece 57 is attached to the fluid cylinder 55.

With the above structure, when the fluid cylinder 51 is operated, the work clamp 4 is moved through the piston rod 53.
7 is moved back and forth. Further, the work W is clamped by operating the fluid cylinder 55 and lowering the clamp piece 57. When the clamp piece 57 is raised in this state, it is unclamped, the fluid cylinder 51 is operated, and the work clamp 47 is retracted (moved to the right in FIG. 1), whereby the work W is set on the lower mold 11. Will be.

A positioning device 59 is provided on the rear side of the lower die 11 (on the left side in FIG. 1). As an example of the positioning device 59, as shown in FIG. 1, a known back gauge 61 that is movable in the front-rear direction is provided. Since a specific movement driving means for moving the back gauge 61 in the front-rear direction is known, detailed description thereof will be omitted. The tip of this back gauge 61 (see FIG.
At the right end of the figure, a magnet 63 made of, for example, a permanent magnet or an electromagnet is provided.

With the above structure, the work W lifted up by the suction pad 39 is replaced by the work clamp 47 waiting at the clamp position shown by the chain double-dashed line. The work W held by the work clamp 47 is the loader 4
When 3 is moved rightward in FIG. 3 along the loader guide rail 43, the work W sags and the rear part of the work W is moved while being supported on the lower mold 11, and the work clamp 47 is shown by a solid line. Stop at the unclamp position,
Unclamped. When the work clamp 47 is retracted, the work W is set on the lower mold 11.

When the work W is moved to the right in FIG. 3, the magnet 63 provided at the tip of the back gauge 61, which is the positioning device 59, is positioned in the front-rear direction according to the width of the work W in advance. , When the work W is set on the lower mold 11 apart from the work clamp 47,
Even if the work W is slightly displaced in the front-rear direction, the end surface of the work W is attracted and attracted by the magnetic force of the magnet 63, so that the work W can be positioned easily and accurately.

When the width dimension of the work W changes, it can be easily dealt with by moving the back gauge 63 of the positioning device 61 in the front-rear direction.

Therefore, by activating the press brake 1 after the work W is completely positioned, generation of defective products and reduction in product accuracy are prevented.

FIG. 2 shows another embodiment of the positioning device 61. In FIG. 2, the same parts as those in the above-described embodiment are designated by the same reference numerals, and only different points will be described.

In FIG. 2, a rotatable screw member 67 is horizontally supported via a bearing 65 on the rear side surface (the left side surface in FIG. 2) of the lower die 11, and the screw member 67 has a nut. The member 69 is screwed. The magnet 63 is integrated with the upper portion of the nut member 69.

With the above structure, when the screw member 67 is rotated by a drive motor (not shown), the nut member 69 is moved in the front-rear direction, so that the magnet 63 is positioned at an appropriate position in the front-rear direction. The position of the magnet 63 is accurately detected by an encoder or the like provided in the drive motor. Since the effect of this embodiment is the same as that of the above-mentioned embodiment, its explanation is omitted.

The present invention is not limited to the above-described embodiments, but can be implemented in other modes by making appropriate changes. As the drive means for moving the magnet 63 in the front-back direction according to the width dimension of the work W, a drive device such as a fluid cylinder may be used.

[0038]

As can be understood from the above description of the embodiments, according to the present invention, since the structure is as described in the claims, it is clamped by the work clamp and carried in. When the workpiece is unclamped at the unclamp position, it is set on the mold.At this time, even if the workpiece is set in a slightly displaced state, the magnet provided at the tip of the positioning device is preset to a predetermined position. Since the work is positioned and is on standby, the end surface of the work is attracted and attracted by the magnetic force of the magnet, and the work can be positioned easily and accurately. Thus, it is possible to prevent the generation of defective products and the deterioration of product accuracy. Further, even if the width dimension of the work changes, it can be easily dealt with.

[Brief description of drawings]

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

FIG. 2 is an explanatory view showing another embodiment replacing FIG.

FIG. 3 is a front view in which a work loading device is arranged in a press brake embodying the present invention.

FIG. 4 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 Sheet Picking Device 19 Loading Device 35 Suction Frame 39 Suction Pad 45 Loader 47 Work Clamp 59 Positioning Device 61 Back gauge 63 Magnet

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁵ Identification number Office reference number FI technical display location B65H 9/04 B 8922-3F // 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 movable loading device that moves a work clamp that clamps a work lifted by a suction pad provided in the work single-sheet picking device to the bender. A work loading device for a bender, comprising a positioning device that is movable back and forth and that includes a magnet that attracts the end surface of the work.