JP2553718Y2 - Press brake work support device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work supporting device for a press brake for supporting a work to be bent from below.

[0002]

2. Description of the Related Art A conventional press brake for bending a plate-shaped workpiece is provided with a back stop for positioning the bending position, and the bending position is determined by abutting the tip of the workpiece against the back stop. Positioning. However, in the case of a work having a long length from the tip to the bending position (hereinafter, referred to as a leg length), if the tip of the work abuts against the backstop, the tip side hangs down due to the weight of the tip of the work, and accurate positioning cannot be performed. . For this reason, conventionally, when bending a work having a long leg length, bending of the work is prevented by using a fixed support or a special jig.

[0003]

[Problems to be solved by the present invention] However, the method of setting a fixed support or a special jig every time a long-length workpiece is bent or removing them after the work is completed requires a lot of man-hours for setup work. Problems such as poor work efficiency. The present invention has been made in order to improve the above-described problem, and has as its object to provide a work supporting device for a press brake which can accurately position even a work having a long leg.

[0004]

According to the present invention, in order to achieve the above object, a plate-like work is moved between an upper die fixed to a movable beam movable vertically and a lower die fixed to a fixed beam. In the press brake for bending, a plurality of work supporting members for supporting the leading end side of the work from below are provided in the vicinity of the back stop for positioning the bending position of the work so as to be vertically movable, The work supporting member can be flipped upward by a flipping means.

[0005]

[Work] When the bending position of the work is determined by the above configuration, since the front end of the work is supported by the work supporting member , the front end of the work does not bend downward. Can be positioned.

[0006]

[Embodiment] An embodiment of the present invention will be described in detail with reference to the drawings. 1 is a side view of a press brake, FIG. 2 is a plan view of a work supporting device, FIG. 3 is an enlarged view of the main part, and FIG. 4 is a detailed view of a vertical mechanism.

In FIG. 1, reference numeral 1 denotes a press brake body in which a movable beam 1b is provided above a fixed beam 1a, and an upper die 2 attached to a lower portion of the movable beam 1b.
Then, the plate-shaped work 4 can be bent between the lower mold 3 fixed on the fixed beam 1a.

Reference numeral 5 denotes a backstop for positioning the bending position of the work 4, and reference numeral 6 denotes a work 4 which supports the work 4, the tip of which abuts against the backstop 5, from below.
2 shows a work supporting device for preventing the downward bending of the work supporting device. The work support device 6 has a rotating shaft 9 whose both ends are supported by the press brake body 1 via an up-and-down mechanism 8.

The up-and-down mechanism 8 includes a guide rail 1 laid at a position facing the press brake body 1 as shown in FIG.
The slide member 11 is guided by the movable member 0 and can move up and down. A rack 12 is fixed to the slide member 11 so as to penetrate in a vertical direction. The upper ends of these racks 12 are inserted into the gear case 13,
And meshed with a pinion 14 provided therein.

Each of the pinions 14 is fixed to both ends of a synchronous shaft 15 so as to rotate synchronously with the synchronous shaft 15 and has a worm as shown in FIG. Wheel 16 is attached,
A worm 17 is meshed with the worm wheel 16. The worm 17 is the press brake body 1
Endless belt 19 by lift motor 18 attached to
It is adapted to be rotated through.

On the other hand, a bearing box 21 is fixed to the lower end of each of the racks 12.
Are rotatably supported at both ends. Mounting brackets 22 are fixed to the rotating shaft 9 at substantially equal intervals in the longitudinal direction. One end of a work supporting member 23 for supporting the work 4 from below is attached to the mounting bracket 22 by a set screw 24 so as to be detachable.

A lever 26 is fixed to one end of the rotating shaft 9, and a tip of a piston rod 25 a of a flip-up cylinder 25 is pivotally attached to a tip of the lever 26.
The flip-up cylinder 25 has a base end pivotally attached to the tip of a cylinder bracket 11a projecting obliquely rearward from one of the slide members 11 so that the rotating shaft 9 can be rotated by expanding and contracting the piston rod 25a. Has become.

Next, the operation will be described. In bending the plate-shaped work 4, the bending position is first determined. At this time, when the work 4 having a long leg length L is bent, the work support is required. The rotating shaft 9 is rotated by the flip-up cylinder 25 so that the member 23 is in the horizontal position as shown in the figure. In this state, the bending position is determined by abutting the front end of the work 4 against the backstop 5, but since the front end side of the work 4 is supported from below by the work support member 23, the front end side of the work 4 is bent downward. And the bending position can be accurately positioned.

When the positioning of the work 4 is completed, the movable beam 1b is lowered, and the work 4 is bent between the upper mold 2 attached to the lower end of the movable beam 1b and the lower mold 3 fixed to the fixed beam 1a. Is what you do. If the height of the upper surface of the lower mold 3 changes when the mold is replaced, the lift motor 1
8, the upper and lower racks 12 are moved up and down simultaneously by the pinions 14 attached to both ends of the synchronous shaft 15 so that the upper surface of the lower mold 3 and the upper surface of the work supporting member 23 have substantially the same height. It can be adjusted to be

Further, in the case where the work 4 having a short leg length L is bent or the work supporting member 23 becomes a hindrance in the working, the rotating shaft 9 is rotated by the flip-up cylinder 25 so that the work supporting member 23 is By jumping up to the position indicated by the imaginary line, there is no hindrance to the work.

[0016]

As described in detail above, when the bending position of a work with a long leg is positioned, the work tip is supported from below by the work support member. It does not bend downward. As a result, the workpiece can be accurately positioned, so that the bending can be performed with high accuracy. In addition, the setup time is hardly required without the need for the fixing support or the special jig. Further, when not in use, the work supporting member can be flipped up and stored, so that it does not hinder the work.

[Brief description of the drawings]

FIG. 1 is a side view of a press brake employing a work supporting device according to an embodiment of the present invention.

FIG. 2 is a plan view of a work supporting device according to an embodiment of the present invention.

FIG. 3 is an enlarged view of the main part.

FIG. 4 is a detailed view of the vertical mechanism.

[Explanation of symbols]

1a fixed beam, 1b movable beam, upper mold, 3
Lower mold, 4 work, 5 back stop, 23 work support members .

Claims (1)

(57) [Scope of request for utility model registration] 1. A press brake for bending a plate-like work 4 between an upper mold 2 attached to a movable beam 1b that can move up and down and a lower mold 3 fixed to a fixed beam 1a. of the vicinity of the backstop 5 for positioning the folding position, a plurality of workpiece support members 23 for supporting the front end side of the workpiece 4 from below with vertically movably provided, upwards by means flip up the respective workpiece support members 23 Press brake work support device that can be flipped up.