JPS59199200A - Press brake device - Google Patents

Abstract

PURPOSE:To improve the working efficiency and safety of a press brake operation by providing pressing or retracting mechanisms for moving a work on a recessed die on the right and left of a mounting base thereby mechanizing the movement of the work on the recessed die. CONSTITUTION:When a work W4 is placed on a recessed die 3 and pressing mechanisms 8 are actuated in a pressing stage using a stopper 6, pressing bars 8a project from the point A and press the work W4 to stoppers 6. A command for moving downward a projected die 2 is then emitted to start pressing the work. A safety device 5 is preliminarily interlocked to the movement of the die 2 and is designed to function only when the die 2 descends or ascends. A mounting base 10 is attached to the body part 1 of this press brake device.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a press brake device, and more particularly to a device that improves the safety and economy of press brake operations.

It is well known that a press brake device (hereinafter simply referred to as a press) generally has a convex and a concave metal mold to pressurize a workpiece, and is used for various bending and drawing processes. Furthermore, although this press is used as an essential piece of equipment for the plastic processing of workpieces (hereinafter referred to as workpieces), it is also widely known as a piece of equipment that often causes work-related accidents, such as injuries to hands during work.

The overall configuration of a conventional press is as shown in FIG.

That is, on the upper side of the main body 1, which forms the base of the press, there is a convex mold 2 that moves in the vertical direction, and on the lower side there is a concave mold 3 that opposes the convex mold 2, and further on the front side there is an operation panel 4 and a safety device. (a pair of left and right) 5, and normally the convex mold 2 is lowered in response to a command from the operation panel 4 to perform necessary machining on the workpiece. The safety device 5 employs a photoelectric beam system in which a light beam K is emitted from m1 and the other side receives this light beam K. When this light beam K is blocked by an intrusion of a foreign object such as a worker's hand, the convex m2 A control method is used to stop the descending function.

Next, the processing state of the workpiece W1 and the operating state of the safety device 5 will be explained.

FIG. 2 to FIG. 4 show an example in which the workpiece W1 is wide and its front end wraps with the safety device 5, and the flow from FIG. 2 to FIG. 4 corresponds to the forward process. Here, to explain in detail the movement of the worker (hand H), the movement of the convex die 2, and the operating state of the safety device 5, the hand H is exposed to the light beam K when the work Wl is inserted from the front and pressed against the back stopper 6. A safety device 5 is activated to block the movement (as shown in the figure), and the descent of the convex mold 2 is electrically restricted. Then, when the hand H is released, the descent starts according to the command from the control panel, but at this time, unless the safety device 5 is active (shown as live) and there is no intrusion of dangerous substances such as the hand H, pressurization work is not carried out. continue. However, the third
As shown in the figure, at the stage where the pressurization has progressed, the seek W1 is moved to the cradle 7.
At this time, Turk W1 himself shoots a beam of light K.
There is a problem in that the lowering of the convex die 2 is stopped during pressurization because the pressure is interrupted. For this reason, it is necessary to stop the function of the safety device 5 (indicated as stopped) during the pressurization stage as shown in Fig. 3, and in the unlikely event that a hand H enters the safety device 5 while the function is stopped. There remains a risk of personal injury. This pressurizing work ends in the state shown in Fig. 4, but in this case, even if the convex die 2 moves, the safety device 5 is activated (on) by the hand H that takes out the workpiece W1, so danger to the worker is avoided. Ru.

On the other hand, the pressurized state of the narrow workpiece W2 is as shown in FIG. The work procedure and the operating state of the safety device 5 are as described in the second section above.
Although it is substantially the same as the figure, the safety device 5 is not activated due to the workpiece W1 jumping up as shown in FIG. 3, as a matter of course.

Furthermore, in the case of press working, the workpiece W3 may be pressurized using the front stopper 7 in front as a reference as shown in FIG. In this case, since the light beam is inserted from the front and the work performed near the convex mold 2 increases, the light beam is frequently blocked, which inevitably increases the risk factor for the worker.

The outline of press working, the operation of the safety device 5, etc. have been explained above, but those involved are generally concerned about the high rate of accidents for workers associated with press working. In addition, in the configuration of the conventional safety device 5, it is uneconomical to interrupt the transition of the excessively convex shape 2 to guarantee the safety of the worker (hand H), and the safety device 5
There are still issues that need to be resolved in terms of efficiency and lifespan, such as equipment wear and tear due to frequent zero-on/off (activation and deactivation of functions). In particular, there are many cases in which workers dislike this uneconomical effect and act recklessly by stopping the function of the safety device 5, and it is necessary that the safety device itself also has an economic effect.

In view of this point, the present invention has been made to provide a press that mechanizes the movement of a workpiece on a concave die and is highly effective in terms of both work efficiency and safety.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

In FIG. 7 to FIG. 10, parts with the same reference numerals as in the conventional art have the same functions and explanations will be omitted. In the present invention, there are two sets each for moving the workpieces W4 and W5 on the concave die 3. The pressing mechanism 8 and the retracting mechanism 9 are mounted on a stand 10. In this case, the mounting table 10 is in the form of an abbreviated character, and the pressing mechanism 8 and the retracting mechanism 119 are fixed on both sides thereof. And the installation is pedestal 10
There is a mounting hole ioa, and the pressing mechanism 8 and the retracting mechanism 9 can be fixed to the main body 1 by using the mounting hole 10a.

Here, to explain the pressurizing process using the back stopper 6, although not shown, the operator places the workpiece W4 on the concave die 3, and places his hand H on the operation panel 4. Then, when another operation command is issued and the pressing mechanism 8 (with a built-in hydraulic servo) is activated, the pressing mechanism 8a protrudes from point A and presses the workpiece W4 against the back stopper 6. Next, a pressurizing operation is performed by a descending command to the convex mold 2. The safety device 5 is linked in advance to the movement of the convex mold 2 (not shown), and has a built-in control system that makes use of its function when the convex mold 2 descends or ascends. be.

Furthermore, when applying pressure using the front stopper 7, as shown in FIG. Frontos.

The mechanism is such that it moves until it touches Toppa 7.

The retracting mechanism 9 is connected to the main body 1 by a pipe 9C, and is configured to perform suction and stop using a vacuum mechanism built into the main body 1 (not shown). In addition, the upper surface of the suction cup 9a is located at a position only a few millimeters higher than the workpiece W5, and when the weight of the workpiece W5 is applied, the suction cup 9a (made of soft rubber) uses its own elasticity to come into close contact. The desired suction force is exerted only when the suction force of the vacuum mechanism is absorbed by the suction force. In this case as well, the safety device 5 is linked to the convex mold 2, and when the convex mold 2 finishes pressurizing work, the operator can remove the workpiece W5.
The procedure for extracting is the same as above.

〔Effect of the invention〕

In the above pressurizing work, the operator
Just by inserting or removing the workpiece and issuing a movement command from the operation panel 4, there is no need to move the workpiece to the conventional twist stopper 6 and front stopper 7, and this process can be done manually, which is considered the most dangerous process. The work can be mechanized, and the safety device 5 can provide stable personal protection without unnecessary operation.

Additionally, there are the following advantages that are not mentioned above.

1. In the case of a long workpiece, conventionally two major tasks were required to uniformly and reliably press both ends of the workpiece against the back or front stopper. effective. It also eliminates the danger of signal errors that are unique to the two major operations.

2. Although illustration can be omitted, for example, if the bent workpiece W4 in FIG. 9 is moved by the retracting mechanism 9 as shown in FIG. 10,
-Multiple bending operations can be performed in succession by continuous mechanical force. Further, if the operations of both the pushing and retracting mechanisms and the operation of the convex mold 2 are electrically linked, the frequency of operation commands by the operator can be reduced.

3. On one mounting base 10, press mechanism 8 and pull → mechanism 9
The 1-press brake can be assembled and attached to the main body part L.It is extremely easy to attach the press brake to the main body.

[Brief explanation of drawings]

Figure 1 is a perspective view showing the appearance of a conventional press; Figure 2;
Figures 3, 4, 5, and 6 are cross-sectional views taken along the line I-I in Figure 1, and are diagrams illustrating the pressurization type 1', Figures 7, and 9. and FIG. 10 show an embodiment of the present invention, FIG. 7 is a perspective view similar to the conventional FIG. 1, FIG. 8 is a diagram of the press brake device according to the present invention, and FIG.
The figure and FIG. 10 are cross-sectional views taken along the line ■-■ in FIG. 7.

Claims (1)

[Claims] 1. A main body, an operation panel provided on this main body, a convex shape that moves vertically according to commands from the operation panel, a concave shape provided at a position opposite to this convex shape, and while the convex shape moves; In a press brake device equipped with a safety device for detecting the intrusion of foreign matter, etc., the non-stop part is provided with mechanisms on both left and right sides for transferring the workpiece onto the concave mold by pressing or pulling, and these mechanisms are provided. A press brake device characterized by being installed on one mounting base.