JPS6145999Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a safety block for a press that is used by being interposed between a bolster and a slide.

[Background Art and Problems Therein] Generally, when inspecting a press or performing maintenance and inspection on a mold, a safety block is placed on the top of the press's bolster, and this prevents the press from inadvertently or for some other reason. Even if the slide is lowered by operation, the block prevents the slide from lowering so that there is no danger to the operator.

By the way, conventional safety blocks include a cylindrical block body that can be placed on the upper surface of the press bolster, and a receptacle (outlet outlet) that is connected to this body by a connecting device such as a chain and opens and closes the press starting circuit. A plug-in) is known. In use, such conventional safety blocks are used by removing the receptacle from the press, disabling the slide, and resting the block body on a bolster.
When not in use, the receptacle is inserted into the press to operate the slide of the press, and the block body is stored in the frame of the press.

The conventional safety block requires a worker to place it on the bolster by hand, which places a heavy burden on the worker. That is, when a large press is used, the weight of the block itself becomes large, making it difficult for an operator to carry it around by hand. Further, each time the safety block is used or not used, the receptacle must be removed and inserted, which is quite troublesome and places an additional burden on the operator.

[Purpose of the invention] The purpose of the invention is to provide a safety block that is easy to handle and highly safe.

[Means and effects for solving the problem] The present invention includes a block body placed on a bolster, and a block body connected to the block body and rotatable at a rotation fulcrum provided near the bolster. The press includes a supported arm and an interlock means for opening and closing a starting circuit of the press, and the block body is movably provided between a bolster and a block storage section provided apart from the bolster. The interlock means prevents the press from operating when the block body leaves the block housing, thereby allowing the block body to be easily placed on the bolster by rotation, and the block body The purpose is to achieve the above object by automatically operating the interlock means when the motor moves toward the bolster side.

[Example] Hereinafter, an example of the present invention will be described based on the drawings.

FIG. 1 shows a schematic configuration of the safety block according to the present invention applied to a press.
In this figure, columns 11 are erected on the four outer circumferential sides of the bolster 10, separated from the bolster 10 by a predetermined distance. Of these columns 11, two columns 11 located diagonally to the bolster 10 are each provided with a safety block 20 rotatably via a pivot point 40. As a result, the safety block 20
0 and a block storage section 60 formed on one side of the inside of the column 11.

The safety block 20 is located between the bolster 10 and the slide 15 above the bolster 10, as shown in FIG. The block body 21 includes a block body 21 and a pair of arms 22 respectively connected to both ends of the block body 21 in the axial direction.

Further, the block main body 21 includes a cylinder body 25 which is provided in a double cylinder shape by rotatably inserting an inner cylinder 24 into an outer cylinder 23, and a cylinder body 25 that is fixed to both ends of the inner cylinder 24, respectively. and a nut member 26 that is rotatable on the outer cylinder 23, and a male threaded portion 2 that is screwed into the nut member 26 in the upper part of the figure and formed relatively long.
7 and a lower nut 2
6, and a bolster receiver 29 whose lower surface side is installed on the upper surface of the bolster 10, and a handle 30 which is fixed to the upper outer surface of the cylinder body 25 and is used to move the block body 21. There is.

The slide receiver 28 and the bolster receiver 29
The height of the block body 21 can be made variable by adjusting the amount of screwing into the nut member 26.

A bush 32 in which a through hole 31 is formed in a direction parallel to the axial direction of the cylinder body 25 is fixed to the tip of each arm 22 connected to the block body 21, and this bush 32 is connected to the connecting pin 3.
3, and is rotatably connected to a bush 35 fixed to the column 11 side via a bracket 34. Here, the bush 32,
35, the connecting pin 33, and the bracket 34 form pivot points 40 at the top and bottom, respectively.

Guides 36 are provided around the lower bush 32 in the same direction as the through hole 31 and at two locations for fixing the position of the block body 21 when it is in use and when it is not in use. ing. A lock pin 38 connected to the column 11 via a chain 37 is inserted into these guides 36, and the tip of the lock pin 38 is inserted into a guide 39 provided outside the bush 35 on the column 11 side. It's getting old.

The guide 39 is arranged so that the block main body 21 is placed on the upper surface of the bolster 10 and the block main body 21 is placed in the block storage section 60 on the column side.
The guide 36 is positioned on the same axis as the guide 36. Therefore, the guide 3
6 and 39 are aligned in series and the lock pin 38 is inserted, the block body 21
Free movement of people will be completely prevented.

The lower pivot point 40 bushes 32 and 3
5, as shown in FIG. 3, when the block body 21 is placed on the upper surface of the bolster 10, the lower end of the block body 21, that is, the bolster receiver 29, does not collide with the side surface of the bolster 10. A block abutment prevention means 50 is provided for slightly raising the block body 21.

The block abutment prevention means 50 is fixed to a bush 32 provided on the lower arm 22 and has an inclined surface 51A, and a cam 51 provided on a bush 35 provided on the column 11 side. Cam 52 with surface 52A
These inclined surfaces 51A, 52A
The block body 21 is raised by the relative contact movement of the block body 21. The inclined surfaces 51A, 52A
The formation position of the block body 21 is set in advance so that it rises immediately before the block body 21 is placed on the bolster 10, and descends to the initial position at the position where the block body 21 is placed on the upper surface of the bolster 10.

The block storage section 60 is constituted by a box 61 fixed to the side surface of the column 11, as shown in FIGS. The top plate 62 of the box body 61 is partially protruded from the peripheral wall of the box body 51, and the protruding outer peripheral edge is provided so as to be inclined slightly downward, so that the top plate 62 of the block body 21 is Boarding is now going smoothly. Further, an oval hole 63 is provided in the center of the top plate 62, and an operating arm 65 of a switch 64 as an interlock means installed inside the box body 61 projects from this hole 63. . This operating arm 65 is movable between the dotted line and the solid line in FIG. 5, and when the block body 21 is positioned on the top plate 62, it is tilted to the position shown by the solid line to operate the press. On the other hand, when the block body 21 is moved from the top plate 62, it rises to the chain line position and the press can be operated.

Next, a method of using the safety block according to the present invention will be explained.

During press processing, the block main body 21 is positioned in the block storage portion 60 so as not to interfere with the vertical movement of the slide 15. In this state, the guide 36 of the lower arm 22
A lock pin 38 is inserted into the guide 39 provided on the bush 35 side and connected to each other, so that free movement of the block body 21 is completely prevented.
Further, in this state, the operating arm 65 is pushed into the lower surface of the bolster receiver 29 of the block body 21, so that the press is maintained in an operating state.

Next, when using the safety block in mold replacement work, etc., the lock pin 38 is removed, the handle 30 of the block body 21 is grasped, and the block is rotated about the rotation fulcrum 40 onto the bolster 10. let At this time, the block body 21 is
Both inclined surfaces 51A of the block contact prevention means 50
and the bolster 1 is raised by the action of 52A.
Collision against zero is prevented.

After placing the block body 21 on the bolster 10 in this manner, the guides 36 and 39 are connected by the lock pin 38, and the block body 21 is placed on the bolster 10.
1 is prevented from moving. At this time, the operating arm 65 of the switch 64 rises, rendering the press inoperable. Here, when adjusting the length of the block body 21 in accordance with the dimension between the press bolster 10 and the slide 15, the slide receiver 2
8 is raised or lowered to change the length of the block body 21 to some extent, thereby creating an appropriate gap between the lower surface of the slide 15 and the upper surface of the slide receiver 28, so that the slide 15 Even if you accidentally descend for some reason, the impact can be alleviated.

This embodiment has the following effects.

That is, since the block body 21 can always be positioned either on the bolster 10 or in the block storage section 60 and can be rotated, it is not necessary for the operator to carry the block body. In addition, when using
The operation is extremely easy because it is only necessary to remove the lock pin 38, grasp the handle 30, and rotate it.

Furthermore, the abutment prevention means 5 of the block main body 21
0, the block body 21 is attached to the bolster 1.
There is no risk of the block body 21 colliding with the block 0, and dangers such as damage can be effectively prevented, and the block body 21 can be rotated and moved smoothly.

Furthermore, since the overall length of the block body 21 can be varied by simply adjusting the screwing amount of the slide receiver 28 into the nut member 26 fitted to the cylinder body 25, the dimension between the bolster 10 and the slide 15 can be changed. It can be easily adapted to different presses and provides a highly versatile safety block.

Further, since the block storage section 60 is provided with a switch 64 as an interlock means, the switch 64 can be automatically switched depending on whether or not the block body 21 is located in the storage section 60. There is no need to insert or remove the receptacle as in the past, and the burden on the operator can be dramatically reduced, and the block can be made with excellent safety.

In addition, in this embodiment, the block body 21
Although the abutment prevention means 50 is constituted by the arm 22 and the inclined surfaces 51A and 52A of the bush 35, it is not necessarily limited to this.
For example, the bolster receiver 29 is connected to the cylindrical body 25 of the block body 21 through a biasing means so as to be relatively movable, and is normally biased in the protruding direction, so that when a lifting force is applied to the bolster receiver 29, It may be of a so-called telescopic configuration that can move inside the cylindrical body 25. Also,
Alternatively, a suitable inclined surface may be provided at the insertion position of the block body 21 in the bolster 10.

In addition, the safety block of this embodiment is shown in column 11.
Although a structure in which the safety block is supported on the side has been described, it is also possible to provide the support portion of the safety block on the side surface of the bolster 10. For example, when it is provided on the side surface of the bolster 10, if an appropriate link mechanism or the like is provided so that it rises from the side surface of the bolster 10, it can be constructed in the same manner as in the previous embodiment. However, if it is supported on the column 11 side, the support structure can be simplified and it can be effectively prevented from getting in the way when replacing the mold.

Although the block body 21 has a cylindrical overall shape, it may have other shapes such as a prismatic tube, solid, cylindrical, hollow, or prismatic.

[Effects of the invention] According to the invention as described above, it is possible to provide a safety block that is easy to handle and highly safe.

[Brief explanation of the drawing]

Fig. 1 is a schematic configuration diagram showing an embodiment of the safety block according to the present invention applied to a press, Fig. 2 is a vertical sectional view of the safety block, and Fig. 3 is an enlarged view of the contact prevention means of the safety block. 4 is an enlarged plan view of the main part of FIG. 1, and FIG. 5 is a sectional view showing the block storage section. 10... Bolster, 11... Column, 15...
Slide, 21...Block body, 22...Arm, 40...Rotation fulcrum, 50...Block contact prevention means, 60...Block storage portion, 64...Switch as interlock means.

Claims (1)

[Claims for Utility Model Registration] (1) An arm is connected to the block body, and this arm is rotatably supported on a rotation fulcrum provided near the bolster, and the block body is mounted on the bolster and on this bolster. A safety device characterized in that an interlock means is provided movably between the press and a block housing part separated from the block housing part, and is activated to disable the press when the block body is separated from the block housing part. Block. (2) Utility Model Registration The safety block according to claim 1, characterized in that the block body is provided so that its height can be adjusted. (3) Utility model registration Claims 1 or 2, characterized in that the block abutment prevention means for raising the block body when the block body is placed on the bolster is provided. Safety block. (4) Utility Model Registration The safety block according to any one of claims 1 to 3, characterized in that the rotation fulcrum of the block body is provided in a column of a press.