JPH10305333A - Pole retainer holding structure of metal mold and device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a member of a sliding guide stopper for a pole retainer from being protruded above the surface of the guidepost. SOLUTION: The retainer 11 is attached to the mounting hole 21 of the guidepost 3 with screws. A guide pin member 12 is inserted in the bore 14 formed at the center of the retainer material 11 so that the guided pin member 12 is freely slidable. The guide pin material 12 is being held by a snap ring 18 not to be slip off from the retainer material 11. The pole retainer 4 which is fitted to the outer peripheral of the guidepost 3 is also prevented form being slipped out by a stopper member 13, which is provided to the top plate of the guide pin member 12. Since the shape of the insert bore 14 and the outer shape of the guide pin member 12 are made an unusual shape like, for example, a regular hexagon, the relative rotation of the two is restricted. The retainer member 11 is lead to tightly screwed into the mounting hole 21 with the rotation of the retainer 11 by rotating the rotation tools such as a spanner being attached to the outer peripheral part of the guide pin member 12 exposed above the top of the guide post 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a locking structure and a locking mechanism for a ball retainer in a press die in which an upper die holder and a lower die holder are guided by using a guide post having a ball retainer. The present invention relates to an assembly for use.

[0002]

2. Description of the Related Art In a press die, a guide post is used to guide an upper die holder and a lower die holder so as to be vertically displaced relative to each other while maintaining a predetermined relative positional relationship. You. For example, a guide post is provided in the lower mold holder so as to extend upward, while a guide hole in which the guide post is slidably fitted is formed in the upper mold holder. And recently, in order to smoothly slide the guide post with the guide hole, a ball retainer as a rolling bearing is often fitted around the guide post.

[0003] The ball retainer is always held by the guide post. However, since the ball retainer is relatively displaced in the axial direction with respect to the guide post, it is necessary to prevent the ball post from coming off from the tip end side of the guide post. Some of the locking mechanisms for preventing the ball retainer from coming off are assembled to the guide post by using a screw engagement. That is, the locking mechanism has a holding member, a guide pin member, and a stopper member, and the holding member is screwed into a mounting hole formed in the guide post so as to open at the front end surface, A ball retainer in which a guide pin member is displaceable by a predetermined amount in the axial direction of the guide post and is held by the holding member, and is fitted to an outer periphery of the guide post by a stopper member provided at a tip end of the guide pin member. It is made to keep out of.

[0004] In order to screw the holding member into the mounting hole of the guide post, a flange portion (large-diameter portion) slightly protruding from the distal end surface of the guide post is held when the holding member is completely assembled to the guide post. The flange is formed into a member, and the outer peripheral shape of the flange is formed into a cross-sectional shape such as a regular hexagon, and a rotating tool such as a spanner is applied to the flange to rotate the flange. Torque).

[0005]

By the way, it is desired that the holding member does not protrude as much as possible toward the tip end of the guide post. That is, the relative displacement amount of the guide pin member (that is, the stopper member) in the guide post axial direction with respect to the holding member is secured to a desired size,
In order to prevent the stopper member from interfering with the pressing member (ram) of the press machine, it is necessary to minimize the minimum protruding length of the locking mechanism from the front end surface of the guide post. The minimum protruding length is inevitably increased accordingly. It is conceivable to eliminate the flange portion of the holding member, but in this case, it becomes impossible to apply a tightening torque to the holding member.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and a first object of the present invention is to fix a holding member to a guide post by screwing from a guide post tip surface of the holding member. It is an object of the present invention to provide a retaining structure for a ball retainer in a press die, wherein the amount of protrusion of the ball retainer can be reduced or reduced to zero.

A second object of the present invention is to provide an assembly for locking a ball retainer in a press die which is suitable for achieving the first object.

[0008]

Means for Solving the Problems In order to achieve the first object, the present invention adopts the following solution. That is, the holding member is screwed into a mounting hole formed in the guide post so as to open at the front end surface thereof, and the guide pin member is displaceable by a predetermined amount in the axial direction of the guide post and held by the holding member. And a stopper member provided at a tip end of the guide pin member for preventing the ball retainer fitted on the outer periphery of the guide post from coming off. In the member, an insertion hole having a different shape in cross section is formed, and the outer shape of the guide pin member inserted into the insertion hole is formed in an irregular shape, and the holding is performed in a state where the guide pin member is inserted through the insertion hole. The relative rotation between the member and the guide pin member is restricted. Preferred embodiments based on the above solution are as described in claims 2 to 5 in the claims.

In order to achieve the second object, the present invention adopts the following solution. That is, a holding member having an insertion hole at the center and having a male screw portion on the outer periphery, a guide pin member slidably fitted in the insertion hole, and a stopper member attached to one end of the guide pin member. In the assembly for locking a ball retainer in a press die in which the guide pin member is prevented from coming off from the holding member, the shape of the insertion hole is made different, and the guide pin member is inserted into the insertion hole. The guide pin member has a different outer peripheral shape, and the relative rotation between the holding member and the guide pin member is regulated in a state where the guide pin member is inserted into the insertion hole. . A preferable mode based on the above solution is as described in claim 7 of the claims.

Since the guide pin member and the holding member are fitted in a state in which the relative rotation is restricted, the outer periphery of the guide pin member, that is, the guide pin member, is exposed to the outside from the front end face of the guide post. By applying a rotating tool such as a spanner to the part that is rotating, the holding member is screwed into the mounting hole formed in the guide post,
The tightening can be performed.

[0011]

According to the first aspect, it is not necessary to separately form a flange portion with which the rotary tool is engaged with the holding member. As a result, the amount of protrusion of the holding member from the front end surface of the guide post is eliminated. Can be made small or zero.

According to the second aspect, the holding member can be closely adhered to the guide post with a large area by using the first tapered portion and the second tapered portion, and the loosening can be effectively prevented. It is preferable to perform the above. According to the third aspect, the amount of protrusion of the holding member from the front end face of the guide post can be made zero. According to the fourth aspect, it is possible to prevent the guide pin member from coming off from the holding member and the stopper member from coming off from the guide pin member by a simple method using the retaining ring. According to the fifth aspect, it is preferable to use a rotary tool having a general shape.

According to the sixth aspect, it is possible to provide an assembly for locking a ball retainer in a press die for obtaining the effect corresponding to the first aspect. According to the seventh aspect, it is possible to provide an assembly for locking a ball retainer in a press die for obtaining an effect corresponding to the second or third aspect.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, reference numeral 1 denotes an upper die holder, and 2 denotes a lower die holder. From the lower mold holder 2,
The guide post 3 stands upright. A ball retainer 4 (simplified in FIG. 1) is fitted around the guide post 3, and the ball retainer 4 can be smoothly displaced in the axial direction with respect to the guide post 3. The ball retainer 4 is urged upward, that is, toward the distal end of the guide post 3 by a return spring 5 composed of a coil spring fitted around the guide post 3. Guide post 3
The ball retainer 4 is prevented from coming off from the front end side of the guide post 3 by a locking mechanism K described later provided at the front end of the guide post 3.

A bush mounting hole 6 is formed in the upper die holder 1 in correspondence with the guide post 3, and a guide bush 7 is fitted into and integrated with the bush mounting hole 6. The inner hole of the guide bush 7 is a guide hole 8, and this guide hole 8
In addition, the ball retainer 4 can be smoothly inserted. Thus, the upper mold holder 2 is smoothly guided in the vertical direction with respect to the lower mold holder 1 by using the ball retainer 4. Note that, for example, a punch is attached to the upper mold holder 2, and a die is attached to the lower mold holder 1 correspondingly.

The locking mechanism K will be described with reference to FIGS. First, the locking mechanism K has a holding member 11, a guide pin member 12, and a stopper member 13. The locking mechanism K is attached to the distal end of the guide post 3. For this reason, the mounting hole 21 is formed in the distal end of the guide post 3. This mounting hole 21
Extends in the axial direction of the guide post 3 and is opened at the distal end surface of the guide post 3. The hole is formed, for example, by drilling from the distal end surface side of the guide post 3.

At the open end of the mounting hole 21, there is formed a first tapered portion 22 whose diameter gradually increases toward the tip. A female screw portion 23 is formed on the inner surface of the mounting hole 21 on the base end side of the first tapered portion 22.

The holding member 11 has an insertion hole 14 extending over its entire length, and the shape of the insertion hole 14 is more specifically a regular hexagon than a different shape. The holding member 11
A male screw portion 15 screwed to the female screw portion 23 is formed at the base end of the holding member 11 for screwing into the mounting hole 21. The first taper portion 22 is provided on the holding member 11 on the distal end side of the male screw portion 15.
A second tapered portion 16 is formed which is seated in close contact with the substrate (the diameter gradually increases toward the tip). The second
The portion having the tapered portion 16 constitutes a large-diameter portion 11 a having a larger diameter than the male screw portion 15.
The base end surface of a is formed as the second tapered portion 16.
Further, the second tapered portion 16 extends to the distal end surface side of the large diameter portion 11a, that is, the end surface on the stopper member 13 side.

The guide pin member (guide rod member)
Reference numeral 12 is elongated in the axial direction of the guide post 3, and is slidably inserted into the insertion hole 14 of the holding member 11. The distal end of the guide pin member 12 has a small diameter portion 12.
A portion other than the small-diameter portion 12a, that is, a long portion that is slid and guided by the holding member 11, has a regular hexagonal shape in which the outer peripheral shape corresponds to the irregular cross-sectional shape, more specifically, the shape of the insertion hole 14. (The cross-sectional irregular shape portion is indicated by reference numeral 12b). As a result, the guide pin member 12 can be relatively displaced in the axial direction of the guide post 3 substantially without rattling with respect to the holding member 11, but cannot be displaced in the circumferential direction, that is, the relative rotation with respect to the holding member 11 is not possible. Regulated.

The stopper member 13 is formed, for example, by pressing a thin metal plate into a thin dish shape having a flange-like stopper portion 13a on the outer periphery. The outer diameter of the stopper portion 13a is formed slightly smaller than the diameter of the guide hole 8, and has a size that allows the end face of the (the cylindrical retainer portion of) the ball retainer 4 to abut. The stopper member 13 has a mounting hole 13b formed at the center thereof, and the mounting hole 13b is fitted into the small diameter portion 12a of the guide pin member 12 without play.

When the stopper member 13 is fitted to the small diameter portion 12a, the stopper member 13 is seated on the step 12c between the large diameter portion of the guide pin member 12, that is, the irregularly shaped portion 12b, and the guide post 3 Displacement in the proximal direction is restricted. The stopper member 13 is connected to the guide pin member 12 by the retaining ring 17 attached to the small diameter portion 12a.
From the distal end side is restricted (the stopper member 13 is sandwiched between the retaining ring 17 and the stepped portion 12c). A retaining ring 18 is attached to the base end of the guide pin member 12, thereby restricting the guide pin member 12 from coming off the holding member 11. The guide pin member 12 is easily and inexpensively manufactured by machining a commercially available metal rod member having a regular hexagonal cross section so as to have the small diameter portion 12a and the mounting grooves for the retaining rings 17 and 18. Can be obtained.

The assembling of the locking mechanism K to the guide post 3 is performed as follows. First, the holding member 11, the guide pin member 12, and the stopper member 13
An assembly assembled by using 7, 18 is prepared. In this assembly, the holding member 11 is gripped, and the male screw portion 15 thereof is slightly screwed into the female screw portion 23 of the guide post 3 so that the holding member 11 (the above assembly) does not fall off the guide post 3. State.

Thereafter, a rotating tool such as a spanner or a wrench is engaged with a portion of the irregularly shaped portion 12b of the guide pin member 12 which is located on the distal end side of the holding member 11, and is rotated by the rotating tool. The rotational force in the direction in which the screwing proceeds advances the holding member 11 via the guide pin member 12.
To. Thereby, the male screw portion 1 of the holding member 11 (
5) is tightly screwed into the mounting hole 21 (the internal thread portion 23), that is, tightened until it can no longer be screwed. In this tightening completed state, the first tapered portion 2
The second tapered portion 16 is strongly adhered to and abutted against 2,
The holding member 11 is prevented from loosening. In addition,
The contact between the tapered portions is caused by the guide post 3 of the holding member 11.
Will function as a stopper for preventing screwing of more than a predetermined amount. The inclination angle θ of the tapered portions 16 and 22 (the angle formed with respect to the axis of the guide post 3 in FIG. 4) is the apex angle of the center of the cylindrical polishing tool (an angle corresponding to 2θ and generally 60 degrees). The angle corresponding to
This is preferable in that the tapered portions 16 and 22 can be easily formed.

When the locking mechanism K is to be removed from the guide post 3, the rotating tool is engaged at the distal end side of the holding member 11 in the irregularly shaped portion 12b of the guide pin member 12 as described above, and is screwed together. It is sufficient to apply a rotational force in a direction to loosen the pressure.

FIG. 7 shows a modification of the guide bush, in which the guide bush 7B is provided on the lower surface of the upper mold holder 1. The guide hole 8 into which the ball retainer 4 is inserted may use the guide hole formed in the upper die holder 1 without using a separate guide bush.

Although the embodiment has been described above, the present invention is not limited to this and includes, for example, the following case. The guide post 3, that is, the ball retainer 4 may be provided in the upper mold holder 1, while the guide hole 8 may be provided in the lower mold holder 2.

The portion of the holding member 11 where the second tapered portion 16 is formed is a large diameter portion 1 having a larger diameter than the male screw portion 15.
1a, the large diameter portion 11a for obtaining the stopper function is restricted by the second tapered portion 16 to function as a stopper for restricting the screw engagement with the mounting hole 21 beyond a predetermined value.
May be formed as a mere flange shape having no large diameter portion 11a (for example, the holding member 11 is prevented from loosening with an adhesive; Can also be used when the large diameter portion 11a is provided).

The irregularly shaped portions of the insertion hole 14 and the guide pin member 12 are not limited to regular hexagons, but may be, for example, triangular, quadrangular,
The shape may be an appropriate shape such as a square, particularly a regular polygon. The retaining of the guide pin member 12 from the holding member 11 and the retaining of the stopper member 13 from the guide pin member 12 can be performed by, for example, caulking (for example, by caulking) instead of using the retaining rings 17 and 18. ,
(A large diameter portion for retaining corresponding to 18 is obtained), and an appropriate method can be adopted.

The various members described or illustrated can be expressed by adding the name of the means to the higher-level expression of the function. In addition, the object of the present invention is not limited to what is explicitly specified, but also implicitly includes providing what is expressed as substantially preferable or advantageous.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing a main part of an embodiment of the present invention.

FIG. 2 is an enlarged side sectional view of a main part showing a ball retainer part in FIG. 1;

FIG. 3 is an overall side sectional view showing a locking mechanism.

FIG. 4 is an exploded side sectional view showing a holding member and a mounting hole for a guide post.

FIG. 5 is a view of the holding member as viewed from a front end surface thereof.

FIG. 6 is a cross-sectional view showing an irregularly shaped portion of the guide pin, and FIG.
X6-X6 line | wire equivalent sectional drawing.

FIG. 7 is a side sectional view of a main part showing a modification of the guide bush.

[Description of sign]

 1: upper mold holder 2: lower mold holder 3: guide post 4: ball retainer 8: guide hole 11: holding member 12: guide pin member 12b: deformed portion 13: stopper member 14: insertion hole 15: male screw portion 16: Second taper portion 17, 18: Retaining ring 21: Mounting hole 22: First taper portion 23: Female thread portion

Claims (7)

[Claims] A holding member is screwed into a mounting hole formed in the guide post so as to open at the tip end surface thereof, and the guide pin member is displaceable by a predetermined amount in the axial direction of the guide post. In a ball retainer locking structure of a press die, the ball retainer is held by a member and is prevented from falling out of the ball retainer fitted to the outer periphery of the guide post by a stopper member provided at a tip end of the guide pin member. An insertion hole having a different shape in cross section is formed in the holding member, and an outer peripheral shape of the guide pin member inserted into the insertion hole has an irregular shape, and the guide pin member is inserted into the insertion hole. And a relative rotation between the holding member and the guide pin member is regulated, wherein a retaining structure of the ball retainer in the press die is provided. 2. The mounting hole according to claim 1, wherein the mounting hole has a first tapered portion whose diameter is gradually increased toward an end of the guide post at an opening end thereof. A female screw portion is formed on the base end side, and a male screw portion to be screwed to the female screw portion is formed on the holding member on the base end side, and the first taper is formed on the distal end side of the male screw portion. A second tapered portion which is seated in close contact with the portion is formed, the locking structure of the ball retainer in the press die. 3. The guide post according to claim 1, wherein a distal end surface of the holding member is higher than a distal end surface of the guide post when the male screw portion of the holding member is screwed into the female screw portion of the mounting hole. The retaining structure of the ball retainer in the press die, wherein the ball retainer does not protrude. 4. The guide pin member according to claim 1, wherein the stopper member is fitted to a small-diameter portion formed at a distal end of the guide pin member, and the distal end of the guide pin member is further extended than the stopper member. The stopper ring attached to the small-diameter portion on the side prevents the stopper member from coming off from the guide pin member, and the retaining ring attached to the base end of the guide pin member allows the guide pin member to be removed. A retaining structure for a ball retainer in a press die, wherein the ball retainer is retained from the holding member. 5. The press metal according to claim 1, wherein the shape of the insertion hole and the outer shape of the pin member are each a regular hexagon. The locking structure of the ball retainer in the mold. 6. A holding member having an insertion hole at the center and having a male screw portion on the outer periphery, a guide pin member slidably fitted in the insertion hole, and attached to one end of the guide pin member. A stopper member, wherein the guide pin member is prevented from coming off from the holding member. In a pressing assembly for a ball retainer, the shape of the insertion hole is different from the shape of the insertion hole. The guide pin member inserted into the guide pin member has a different outer shape, and in a state where the guide pin member is inserted into the insertion hole, relative rotation between the holding member and the guide pin member is restricted. An assembly for locking a ball retainer in a press die. 7. The stopper according to claim 6, wherein the holding member has a large-diameter portion having a larger diameter than the male screw portion on the stopper member side of the male screw portion. An assembly for locking a ball retainer in a press die, wherein a surface opposite to a member is formed as a tapered portion whose diameter gradually increases toward the stopper member.