JPH0324252Y2 - - Google Patents

Description

[Detailed description of the invention] Purpose of the invention (industrial application field) This invention is a lower mold for a table of a press machine for supporting the lower mold placed on the upper part of the table of a press machine so as to be movable in the lateral direction. Relating to a support device.

(Prior Art) Conventionally, as shown in FIG.
There was a need to make it easier to move. Therefore, a supporting device 24 with exposed balls 23 that supports the lower die S is placed on the upper surface of the table 22.
2 had multiple installations.

The support device 24 will be explained based on FIG. 6. A spring 25 is installed in a hole 22a formed in the upper part of the table 22. A ball receiving member 26, which is pressed upward by the urging force of the spring 25, is provided on the upper part of the spring 25 so as to be slidable in the hole 22a. Further, the ball receiving member 26 has a plurality of balls 27 received in a concave portion 26a formed in a curved manner in the upper part thereof.
A lower mold support ball 28 for supporting the lower mold S is placed on the upper part of the mold 7. The ball receiving member 2
The upper limit position of 6 is regulated by a lid 29, and the lid 29 is provided with a hole 29a for exposing the upper part of the lower mold support ball 28.

In the support device 24 configured in this way, when the lower die S is placed on the upper part of the lower die support ball 28, the lower die support ball 28 is pressed downward against the biasing force of the spring 25. . Further, since the lower die support ball 28 is smoothly rotated in any direction on the plurality of balls 27, if the lower die S is pressed in the lateral direction, the lower die S is moved in a desired direction.

Note that when the press machine 21 is in operation, the impact caused by the lowering of the upper die T is absorbed by the spring 25, so that the lower die support ball 28, the plurality of balls 27, and the ball receiving member 26 are prevented from being destroyed.

(Problems to be Solved by the Invention) However, in the support device 24, a gap g is formed between the lower mold support ball 28 and the lid body 29. Further, this gap g becomes even larger when the lower mold support ball 28 is lowered against the biasing force of the spring 25 when the lower mold S is placed on the lower mold support ball 28. Therefore, if dust enters the support device 24 through the gap g and remains in the recess 26a of the ball receiving member 26 or the gap G between the balls 27, the rotation of the balls 27 will be inhibited. Ru. As a result, the lower mold support ball 28 does not rotate smoothly, making it difficult to move the lower mold S.

In view of the above-mentioned circumstances, this invention prevents dust from entering inside the support device 24 and prevents the lower mold support ball 28 from entering.
The object of the present invention is to provide a lower die support device for a table of a press machine that can maintain smooth rotation of the press machine.

Structure of the device (means for solving the problem) In order to solve the above problem, this device is installed in a hole 2a provided in the table 2 of the press machine 1,
A ball receiving member 6 that is pressed upward by the elastic force of the elastic member 5, a plurality of balls 7 received in a recess 6a provided in the upper part of the ball receiving member 6, and an upper part of the plurality of balls 7. A lower mold support ball 8 supported by the lower mold support ball 8 is provided, and a hole 9a for exposing the upper part of the lower mold support ball 8 is provided, and a locking protrusion 9b is provided at the inner upper end of the hole 9a, and the hole 2a A lid body 9 that closes the upper end is slidably provided along the inner surface of the locking protrusion 9b, and a flange portion 10a is provided on the outer side of the lower end, and the lower mold support ball 8 is provided on the inner side of the upper end. A dust prevention tube 10 is provided with a sealing protrusion 10b forming a fitting hole 10c into which the upper part of the dust prevention tube is inserted, and the dust prevention tube is interposed between the locking protrusion 9b and the flange portion 10a. 10 is always pressed downward.

(Operation) This invention operates as follows by employing the above-mentioned means.

When the lower mold is not placed, the gap between the lower mold support ball and the lid is closed by the dust prevention tube, preventing dust from entering. Furthermore, when the lower mold is placed, the lower mold support ball is pressed downward against the elastic force of the elastic member, and the dust prevention cylinder is pressed against the lower mold support ball and the lid by the urging force of the urging member. It is pressed downward while sealing the gap between the Therefore, dust is prevented from entering the inside of the device, and the lower mold support ball continues to rotate smoothly.

The placed lower die is freely moved laterally by the smooth rotation of the lower die support ball.

(Example) Hereinafter, an example that embodies this idea will be described.
This will be explained in detail based on FIG.

The lower die supporting device M for the table of the press machine of this embodiment is constructed by utilizing a plurality of holes 2a for inserting cushion pins, which are previously drilled in the table 2 of the press machine 1. To explain the device M for one hole 2a among the plurality of holes 2a, the first
As shown in the figure, in the hole 2a of the table 2,
A cylindrical body 3 is fitted in each. The cylinder body 3
is the flange portion 3a provided on the upper part of the flange portion 3a.
is fitted into and latched to the large diameter portion 2b provided at the upper end of the hole 2a. Further, the lower end of the cylinder 3 is bent inward, and the locking part 3 serves as a bottom part.
b is provided.

A donut-shaped receiving member 4 that is prevented from coming off by a locking portion 3b is installed inside the inner lower part of the cylinder 3, and a spring 5 as an elastic member is provided on the upper surface of the receiving member 4 so that it can expand and contract in the vertical direction. It is placed on. Further, a short cylindrical ball receiving member 6 is mounted on the upper end of the spring 5 so as to be slidable in the vertical direction. A recess 6a is formed in the upper surface of the ball receiving member 6, in which a plurality of balls 7 are received so as to be relatively rotatable. Further, the ball receiving member 6 is pressed upward by the elastic force of the spring 5, and its upper limit position is regulated by a plurality of locking claws 3c provided inside the cylinder body 3. . A lower mold support ball 8 for directly supporting the lower mold S is rotatably supported on the upper part of the plurality of balls 7.

A substantially donut-shaped lid 9 is spot-welded to the upper end of the flange 3a of the cylinder 3, and the lid 9 is attached to the flange 3a of the cylinder 3 with respect to the large diameter portion 2b of the hole 2a. are fitted together. A locking protrusion 9b is provided at the upper end of the inner side of the hole 9a of the lid 9, and a dust prevention tube 10 is slid along the inner surface of the locking protrusion 9b to prevent dust from entering. are movably fitted. The dust prevention tube 10 is provided with a flange portion 10a at its lower end. A spring 11 as a biasing means is interposed between the flange portion 10a and a locking protrusion 9b provided at the inner upper end of the lid body 9, so that the dust prevention cylinder 10 is always It is being pushed downward. Further, at the upper end of the dust prevention tube 10, there is a sealing protrusion 10b bent inward.
is provided. And the dust prevention cylinder 10
The upper part of the lower die support ball 8 is fitted into the fitting hole 10c. Further, the upper part of the lower die support ball 8 protrudes from the upper surface of the table 2 by a predetermined height.

In this way, the gap between the inside of the hole 9a of the lid 9 and the lower mold support ball 8 is closed.

Next, the operation of the lower die supporting device M for a press machine table configured as described above will be explained.

As shown in FIG. 1, when the lower mold S is not placed on the table 2, the dust prevention cylinder 10 is configured to press the upper part of the lower mold support ball 8 downward with its sealing protrusion 10b. is in contact with. Therefore, the gap between the lower die support ball 8 and the lid body 9 is closed by the dust prevention cylinder 10, and the intrusion of dust is prevented.

As shown in FIG. 2, when the lower mold S is placed on the table 2, the lower mold supporting balls 8
is pressed by its own weight, and is lowered against the elastic force of the spring 5. At this time, the dust prevention tube 10
is pressed downward by the biasing force of the spring 11, so the sealing protrusion 10b
The ball 8 is lowered together with the ball 8 while remaining in contact with the upper part of the ball 8. Therefore, the lower die support ball 8 is attached to the lid body 9.
It is descended downwards with the gap between the two being sealed.
As a result, dust is prevented from entering the inside of the device M.

As described above, dust is always prevented from entering the inside of the device M, and dust is prevented from remaining in the recess 6a of the ball receiving member 6 and the gap G between the plurality of balls 7.
Therefore, smooth relative rotation between the plurality of balls 7 and between the balls 7 and the lower mold support ball 8 is maintained.

As shown in FIG. 3, the placed lower die S is freely moved in the lateral direction (for example, in the direction of the arrow) by the smooth rotation of the lower die support ball 8, and is brought to a predetermined position. Easily configured.

Moreover, this idea can also be implemented as follows.

(1) As shown in Fig. 4, the cylinder body 3 and the receiving member 4 of the spring 5 are omitted, and the hole 2a of the table 2 is
The device M shall be installed directly on the

(2) The locking claw 3c that regulates the upper limit position of the ball receiving member 6 can be omitted.

Effects of the invention As detailed above, this invention allows the dust prevention tube to be attached to the urging member even when the lower mold is placed on the table and the lower mold support ball descends against the elastic force of the elastic member. It is constantly pressed downward by force and is lowered together with the lower die support ball with its fitting hole fitted into the lower die support ball, so unlike the conventional technology, there is no gap between the lid body and the lower die support ball. It can be lowered downward in a sealed state, preventing dust from entering the inside of the device, allowing the lower mold support ball to continue to rotate smoothly, and improving the durability of the device. play.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing an embodiment of this invention, Fig. 2 is a sectional view showing the working state of this invention, Fig. 3 is an explanatory diagram also showing the working state, and Fig. 4
The figure is a sectional view showing another example of this invention, FIG. 5 is a perspective view showing a conventional example, and FIG. 6 is a sectional view similarly showing a conventional example. 1...Press machine, 2...Table, 2a...
Hole, 3...Cylinder, 3a...Flange, 3b...
Locking portion, 3c... Locking claw, 5... Spring as an elastic member, 6... Ball receiving member, 6a... Recess, 7... Ball, 8... Lower mold support ball, 9...
...Lid body, 9a...hole, 9b...locking protrusion, 10...
...Dust prevention tube, 10a...Flange part, 10b...
...Blocking protrusion, 10c... Fitting hole, 11... Spring as biasing member, S... Lower die, M... Device.

Claims (1)

[Claims for Utility Model Registration] 1. A ball receiving member 6 which is installed in a hole 2a provided in a table 2 of a press machine 1 and is pressed upward by the elastic force of an elastic member 5; Recessed part 6a provided in the upper part
a plurality of balls 7 received in the upper part of the plurality of balls 7; a lower mold support ball 8 supported on the upper part of the plurality of balls 7; a hole 9a for exposing the upper part of the lower mold support ball 8; A lid body 9 is provided with a locking protrusion 9b at the inner upper end of the locking protrusion 9a and closes the upper end of the hole 2a, and a lid body 9 is provided so as to be slidable along the inner surface of the locking protrusion 9b, and the lower end of the cover body 9 is provided on the outer side of the lower end thereof. flange part 10a
and a sealing protrusion 10b forming a fitting hole 10c into which the upper part of the lower mold support ball 8 is fitted on the inner side of the upper end thereof.
0, and a biasing member 11 that is interposed between the locking protrusion 9b and the flange portion 10a and always presses the dust prevention tube 10 downward. Lower mold support device. 2 The ball receiving member 6 and the plurality of balls 7 are formed into a cylinder having a locking portion 3b of the elastic member 5 at the lower end and a flange portion 3a at the upper end that is locked to the large diameter portion 2b of the hole 2a. A locking pawl 3c is provided inside the body 3 and on the upper part of the inner surface of the cylindrical body 3 for regulating the upper limit position of the ball receiving member 6 against the elastic force of the elastic member 5. A lower mold support device for a table of a press machine according to claim 1 of the registered utility model claim. 3. The lower die support device for a table of a press machine according to claim 1 or 2, wherein the elastic member of the ball receiving member 6 is a spring 5. 4 The biasing member of the dust prevention cylinder 10 is the spring 11
Paragraph 1 or 2 of the claim for utility model registration that is
A lower mold support device for a table of a press machine as described in 2. 5. The lower mold support device for a table of a press machine according to claim 2 or 3, wherein the cylindrical body 3 and the lid body 9 are integrally formed by spot welding.