KR0131674Y1 - Device for falling preventing press slide - Google Patents

Abstract

This paper relates to the improvement of the slide drop preventing device of the press. The slide drop preventing device of the press is provided with a limit switch which releases the slider by the action of the piston rod of the cylinder and detects the latching and releasing state of the slider. In the cylinder, the cylinder is fixed to the plate on the crown frame, the lower bracket having a locking hole on the upper slider vertically fixed, and the upper bracket to form a gap through which the lower bracket enters on the plate facing the configuration At the bottom of the upper bracket, through the support hole coinciding with the center of the piston rod, the piston rod is inserted through the support hole and the engaging hole when the slider is raised to limit the lowering of the slider, and form a dog on the piston rod. Before and after the piston rod by operating the limit switch installed on the plate This can be achieved by sensing the gin.

Description

Slide fall prevention device of press

1 is a block diagram showing the configuration of the prior art.

2 is a block diagram showing the configuration of the present invention.

* Explanation of symbols for main parts of the drawings

10: slider 12: lower bracket

12a: hook hole 20: crown frame

30: plate 32, 34: upper bracket

32a, 34a: support hole 40: cylinder

42: piston rod 42a: dog

L1, L2: limit switch

The present invention relates to a slide fall prevention device of a press that can prevent the drop of the slide in the waiting position in the rising position of the press, and more specifically, it is possible to reduce the volume by installing a drop prevention device on the slider upper portion It is about improvement to be applicable.

In general, the slide of the press moves up and down along the guide during work. During the working stroke, it descends and rises after pressing the workpiece. In the raised state, it is paused, that is, in the stand-by position in the rising position until the next machining start signal is applied. Will be maintained.

Therefore, there is a need for a safety device for preventing the slide falling in the waiting position.

The present invention relates to such a slide fall prevention device, the fall prevention device that has been carried out so far as shown in Figure 1 guided to the column (1) of the press and the lifting jaw (one side of the slider 2) The stop member 3 having 3a) is fixed, and the bracket 4 is bolted on the pillar 1, and the cylinder 5 is installed at one end of the bracket 4, and stopped. A connecting pin 7 is provided at the tip of the piston rod 6 of the cylinder 5 facing the member 3.

In addition, the hook 8 is rotatably installed on the upper part of the bracket 4 by the shaft 9, and the rear side of the hook 8 has a long hole in which the connecting pin 7 of the piston rod 6 is inserted. 8a) is formed.

And the dog 8b is fixed to the upper end of the hook 8, the limit position L1 (L2) supported by the bracket 4 is provided, and the dog 8b rotates the hook 8 by the said dog 8b. Will be detected.

The piston rod 6 is elastically supported by the spring 5a in the cylinder 5 and always protrudes forward when there is no load.

In such a prior art, as the piston rod 6 moves forward by the force of the spring 5a at the point where the slide 2 is raised, the hook 8 rotates about the shaft 9 so that the hook 8 The tip of the stop member is located at the lower end of the locking step (3a) of the stop member 3 to prevent the fall of the slide (2).

At this time, the limit switch (L1) detects the entry (lock state) of the hook 8 to apply a signal to the control unit and the press is in the standby state.

In this state, when the hydraulic pressure is supplied into the cylinder 5 by a signal, the hook 8 is caught by the hydraulic pressure of the spring 5a and the piston rod 6 is retracted by the hydraulic pressure. Since the slider (2) is lowered from the state and can be lowered, processing is performed, and the limit switch (L2) detects the retraction (disengagement state) of the hook (8) and applies a signal to the controller to control the slider operation. You will be confirmed.

However, the conventional fall prevention device having such a configuration and action is not only complicated in the configuration of the device, but also increased in volume, causing difficulties in installation. This is suitable for relatively large loads because the distribution of the load is distributed to the rotating shaft 9 of the hook 8 and the fixing means (bolt, etc.) of the bracket 4, but the installation is difficult due to the above problems in a small press. Not only is it unsuitable, but it is also acting as a factor in raising manufacturing costs.

The present invention has been devised in view of the problems of the prior art as described above, and its purpose is to reduce the volume by simplifying the structure, and at the same time reduce the manufacturing cost, as well as the slide of the press to be efficiently carried out in a small press, etc. An anti-drop device is provided.

The object of the present invention is to prevent the slide falling of the slider by the action of the piston rod of the cylinder and the limit switch for detecting the latching and unlocking state of the slider, respectively, the cylinder on the crown frame It is fixed to the plate, the lower bracket having a locking hole on the top of the slider upward and vertically fixed, and the upper bracket to form a gap that the lower bracket enters on the plate facing the piston bracket at the bottom of the upper bracket The piston rod is inserted through the support hole and the engaging hole when the slider is raised by limiting the lowering of the slider when the slider is raised, and forming a dog on the piston rod to operate the limit switch installed on the plate. By sensing forward and backward movement of the rod have.

In other words, the slide fall prevention is achieved by the supporting force of the piston rod and each bracket, so that the fall prevention device can be installed on the upper part of the slide, eliminating the volume expansion to the side, and the structure becomes simple, making it possible to use the compact press. Will be.

Hereinafter, a detailed description of the present invention based on the preferred embodiment shown in the accompanying drawings as follows.

2 shows a configuration of a preferred embodiment of the present invention, which has a lower bracket 12 fixed to an upper portion of the slide 10, and the lower bracket 12 has a rectangular cross section. It is preferable to be manufactured in the form of a vertical column, and the engaging hole 12a penetrated in the transverse direction is formed at the top.

And a pair of upper brackets 32, 34 are fixed on the plate 30 fixed to the lower end of the crown frame 20 located on the upper portion of the slide 10, the upper bracket 32 ( 34 has two rectangular pillars arranged in parallel to have a predetermined gap b, and each of the upper brackets 32 and 34 is formed with support holes 32a and 34a in a concentric manner at the lower end thereof.

The gap b is configured to be larger than the width of the lower bracket 12 so that the lower bracket 12 is inserted into the gap b when the slider 10 is raised.

The lower bracket 12 is engaged up and down in a state in which the catching hole 12a coincides with the support holes 32a and 34a of the upper bracket 32 and 34 in a state where the lower bracket 12 enters the gap b. It is formed in the form of a long hole to have a margin of.

Meanwhile, limit switches L1 and L2 are fixed on the plate 30 at one side of the upper brackets 32 and 34, and a cylinder 40 is fixed at one side of the limit switch L2.

The center of the piston rod 42 of the cylinder 40 is configured to be located on a line coinciding with the center of the support holes 32a, 34a of the upper bracket 32, 34, the piston rod 42 The tip diameter is configured to allow access to the support holes 32a and 34a.

Moreover, the dog 42a is provided on the piston rod 42, and it is comprised so that the said limit switch L1 and L2 may be operated in a predetermined position.

Reference numeral 14 in the drawings denotes a lower bracket fixing bolt, and 36 is an upper bracket fixing bolt.

According to the present invention having such a configuration, the lower bracket 12 is inserted into the gap b between the upper brackets 32 and 34 in the raised position of the slide 10, and at this time, the support hole 32a. 34a and the engagement hole 12 are in communication.

In this state, the piston rod 42 entering through the one side support hole 32a is inserted into and protrudes into the other support hole 34a through the locking hole 12a as shown in the virtual line of FIG. Will be prevented.

At this time, the limit switch (L1) is activated by the advance of the dog (42a) on the piston rod 42, the control unit receives the signal of the limit switch (L1) to check the advance state (lock state) of the piston rod 42 Done.

On the other hand, at the start of processing, the piston rod 42 is retracted by the signal of the controller so that the dog 42a operates the limit switch L2 and the slider 10 is released so that the slider 10 can be lowered and the controller is limited. Processing is started by receiving a signal from the switch 12.

As described above, the slide fall prevention device of the press according to the present invention attaches the lower bracket 12 to the slider 10, and the upper bracket to receive the lower bracket 12 on the crown frame 20 ( 32 and 34 to support the upper and lower brackets 12, 32 and 34 through the piston rod 42 of the cylinder 40, thereby simplifying the structure and thereby reducing manufacturing costs. To contribute.

In particular, the present invention has the effect that can be easily applied to a small press and at the same time to eliminate the increase in volume due to the conventional installation on the pillar on the side of the slider by installing the drop preventing device on the upper portion of the slider (10).

Claims (1)

Limit switch (L1) (L2) for restraining or releasing the lifting and lowering of the slider 10 by the action of the piston rod 42 of the cylinder 40, and detects the latching and releasing state of the slider 10 In the providing, the upper bracket of the lower bracket 12 having a locking hole (12a) in the upper portion of the vertically fixed, and the lower bracket 12 to enter the lower portion of the crown frame 20 A pair of upper brackets 32 and 34 forming a gap b is opposed to each other, and the support holes 32a coincide with the center of the piston rod 42 in each upper bracket 32 and 34. And a dog (42a) for activating the limit switches (L1) and (L2) integrally on the piston rod (42).