JPH0516048U - Work support device for shearing machine - Google Patents

Abstract

(57) [Abstract] [Purpose] High quality cutting is possible without deformation of the cutting part. A tip end side of a work 6 cut between an upper blade 3 attached to a vertically movable movable beam 2 and a lower blade 5 fixed to a table 4 is lowered by a vertically movable support girder 9. In the work supporting device of the shearing machine which is more supported, the lowering speed of the supporting girder 9 is switched to a plurality of stages according to the lowering speed of the movable beam 2, and the cut work 6 is supported from below. In order to
The weight of the cut work 6 is not applied to the uncut portion, which enables high-quality cutting without deformation of the cut portion.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a work supporting device for a shearing machine that supports a rear end of a work to be cut.

[0002]

[Prior Art]

 Conventionally, a shearing machine for cutting a plate-shaped work has a plate-shaped work e between a fixed blade b fixed on the table a side and a movable blade d mounted on the movable beam c side as shown in FIG. Is configured to be cut, and the tip of the work e to be cut is supported from below by a work supporting device f. Further, the work supporting device f has a supporting girder pivotally supported at one end side below the fixed blade b, and the supporting girder g is vertically moved at the other end centering on the rotation axis i by the fluid pressure actuated cylinder h. It is freely rotatable. When the work e is positioned, it is raised so that the upper surface is horizontal and the tip of the work e is supported downward, and when the work e is cut, the position shown by the phantom line in FIG. The work e that has been lowered to and cut is guided by the shoot j and discharged to the rear of the main body.

[0003]

[Problems to be solved by the device]

 However, in the above-described conventional work supporting device, when the tip of the work e is brought into contact with the back stop n to position the cutting position and then the work e is fixed by the work retainer k, the supporting girder d is lowered to the imaginary line position in FIG. As a result, the dead weight of the work e cut at the time of cutting is added to the uncut portion of the work e, and as a result, the uncut portion is deformed by the dead weight of the cut work e near the end of cutting. There was a problem such as the quality of the cut work e remarkably deteriorated. The present invention has been made for the purpose of improving the above-mentioned problems, and an object thereof is to provide a work supporting device for a shearing machine capable of cutting a work without deteriorating the quality of the cut work.

[0004]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention supports the tip end side of a work piece, which is cut between an upper blade attached to a vertically movable movable beam and a lower blade fixed to the table side, by a freely movable support. In a work supporting device of a shearing machine which is supported from below by a girder, the descending speed of the supporting girder is switched to a plurality of stages according to the descending speed of the movable beam.

[0005]

[Work]

 With the above configuration, since the work can be cut while supporting the cut work from below, the uncut portion of the work is not deformed by its own weight.

[0006]

【Example】

 An embodiment of the present invention will be described in detail with reference to the drawings shown in FIGS. In the figure, 1 is a main body of a shearing machine, 2 is a movable beam provided on the upper part of the main body 1 so as to be movable up and down, and a movable blade 3 attached to the movable beam 2 and a fixed member fixed on a table 4 are fixed. A plate-shaped work 6 can be cut between the blades 5. 7 is a back stop that positions the cutting position of the work 6 by abutting the tip of the work 6, 8 is a work holder that fixes the positioned work 6 until the cutting is completed, and 9 is the back of the work 6. A support girder that supports the end side from below, and 10 represents a chute that discharges the cut work 6 out of the main body 1.

On the other hand, the support girder 9 is composed of a plurality of substantially V-shaped members, one end side of which is fixed to a rotary shaft 12 supported on the front part of the main body 1 via a bearing 11, The other end of the operating cylinder 13 is rotatable about the rotary shaft 12 in the vertical direction, and when these supporting girders 9 are rotated to the lowest position, as shown by the phantom line in FIG. The height is lower than the upper surface of the chute 10. At this time, a long hole 10a through which the support girder 9 can pass is formed in the chute 10 so that the support girder 9 and the chute 10 do not interfere with each other. Further, the fluid pressure actuated cylinder 13 is configured so that the ascending / descending speed can be switched to, for example, two stages by speed switching valves 15 and 16 provided near the fluid pressure actuated cylinder 13.

To explain the operation, when cutting the work 6, first, the support cylinder 9 is raised by the fluid pressure cylinder to a position where the work supporting surface 9a of the support girder 9 becomes substantially horizontal. The work 6 is inserted from the front side of the main body 1 and the tip is brought into contact with the back stop to position the cutting position. When the workpiece 6 is positioned and the workpiece 6 is fixed by the workpiece retainer 8, fluid pressure is supplied to the fluid pressure cylinder 13 from the speed switching valve 15 and the fluid pressure cylinder 13 starts contracting, which causes the workpiece 6 to contract. The supporting girder 9 supporting the 6 starts to descend at a slow speed.

When the supporting girder 9 is lowered to an arbitrary preset position, it is switched to the speed switching valve 16 so that the supporting girder 9 descends at a high speed as the movable beam 2 descends. As a result, the work 6 is cut while the cutting side is supported by the support girder 9, so that the self-weight of the cut work 6 is not added to the uncut portion, and the work 6 cut at the end of cutting is shot. It will be discharged out of the main body 1 by 10. When the cutting of the work 6 is completed and the movable beam 2 and the work retainer 8 rise, the fluid pressure operating cylinder 13 raises the support girder 9 to its original position and waits for the next cutting.

As described in detail above, the present invention is designed so that the lowering speed of the supporting girders for supporting the tip of the work to be cut from below is changed to be slow at first and then faster than midway. It is possible to cut the work while supporting the started work, and the weight of the already cut work is not added to the uncut part. As a result, the uncut part will not be deformed by the weight of the cut work, so that a high quality product can be obtained and a speed switching valve that switches the lifting speed of the support girder between multiple stages is added. Therefore, it can be provided easily and cheaply.

[Brief description of drawings]

FIG. 1 is a side view showing a work supporting device of a shearing machine according to an embodiment of the present invention.

FIG. 2 is a rear view of the same.

FIG. 3 is a side view showing a work supporting device of a conventional shearing machine.

[Explanation of symbols]

2 ... movable beam, 3 ... upper blade, 4 ... table, 5 ... lower blade,
6 ... Work, 9 ... Support girder.

Claims (2)

[Scope of utility model registration request] 1. A support girder 9 capable of moving up and down on a tip side of a work 6 cut between an upper blade 3 attached to a vertically movable beam 2 and a lower blade 5 fixed to a table 4 side. In the work supporting device for the shearing machine, the work supporting device for the shearing machine is configured to switch the descending speed of the supporting girder 9 in a plurality of stages according to the descending speed of the movable beam 2. 2. The work supporting apparatus according to claim 1, wherein the lowering speed of the supporting girder 9 is changed to be slow at first and faster than an arbitrary lowering position.