JP2002336918A - Fall preventive tool for spring for press die - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fall preventive tool for a spring for a press die which is adaptable to the compression of the spring by allowing an elastic locking tool to be bitten between wires of the spring, free from danger of breakage or destruction, capable of reliably preventing a fall of the spring, excellent in biting by tapering a collar and the locking tool, adaptable to the spring of any size by forming the collar in an attachable/detachable manner, and has many variation of the elastic locking tool of circular and polygonal shape, and preventing damages on a backing plate, etc., by a receiving plate. SOLUTION: This fall preventive tool comprises a spring guide retainer which is fitted to the press die for preventing collapse into the spring so as to prevent the spring from being fallen, a fixing bolt for fixing the spring guide retainer to the press die, a tapered collar provided on a lower part of the spring guide retainer, and the elastic locking tool provided on the outer circumference of the collar. The elastic locking tool is swollen in the horizontal direction to hold the spring by rotating the fixing bolt to push down the tapered collar.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spring for a press die for preventing a spring from dropping when an upper die is removed while a press die is mounted on a press machine.

[0002]

2. Description of the Related Art As a conventional technique, Japanese Patent Application Laid-Open No.
No. 6800, a punch plate fixed to the lower side of a punch holder, and a stripper positioned below the punch plate and suspended on the punch holder side so as to be vertically displaceable with respect to the punch plate. A plate, and a plurality of coil springs interposed between the stripper plate and the lower side of the punch holder. A fall prevention device for a coil spring of a press die configured to be fitted to a spring to prevent a fall of each coil spring, wherein at least one protrusion that engages a wire of each coil spring is provided. Each of the locking members has a plurality of plate-shaped locking members, and each of the locking members is located in front of the coil spring in a state of being positioned between the upper end side of the coil spring. Fall preventing device of the press die of the coil spring, characterized in that it is held in the tubular spring guide is disclosed.

However, in the above-described method, since the plate-shaped locking member is located between the filaments on the upper end side of the coil spring, the coil spring is compressed during the operation of the mold, and Since the space between the filaments is also compressed, there is a risk that the plate-shaped locking member will be squeezed and damaged, or the coil spring itself will be broken. Further, since there is no receiving plate interposed between the coil spring and the backing plate, there are various problems such as the backing plate being damaged.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above-mentioned problems, and has an elastic body locking member that is cut into a space between spring wires to adapt to compression of the spring. In addition, there is no danger of breakage or breakage, and the fall can be reliably prevented, and by forming the collar and the locking member in a tapered shape, the bite is further improved, and the collar is formed detachably so that each can be detached. It is compatible with large size springs.
An object of the present invention is to provide a tool for preventing a spring for a press die from being formed in a polygonal shape to increase the number of variations and not to damage a backing plate or the like by a receiving plate.

[0005]

As means for solving the above-mentioned problems, a spring guide retainer for preventing the spring from falling into the spring is mounted on a press die to prevent the spring from falling. A fixing bolt for fixing to a press die, a tapered collar provided at a lower portion of the spring guide retainer,
It consists of an elastic locking member provided on the outer periphery of this collar, and the fixing bolt by rotating the fixing bolt and pushing down the tapered collar causes the elastic locking member to swell horizontally to hold the spring. . In addition, a tapered collar is separately provided below the spring guide retainer. In addition, the inner surface of the elastic
To be formed in a tapered shape like a tapered collar. Furthermore, in order to prevent the spring from dropping, the spring guide retainer is attached to the press die to prevent the spring from falling, a fixing bolt for fixing the spring guide retainer to the press die, and a lower portion of the spring guide retainer. The collar consists of a cylindrical collar provided separately and an elastic locking member provided on the outer periphery of the collar, and the fixing bolt is rotated, and the elastic locking member is horizontally lowered by pushing down the cylindrical collar. Swelling in the direction to hold the spring. Further, the inner surface of the elastic locking member is formed in the same shape as the cylindrical collar. In addition, a groove is formed on the outer periphery of the elastic locking member. Further, the groove is formed in a spiral shape. And the outer periphery of the locking member made of an elastic body is circular.
In addition, the outer periphery of the locking member made of an elastic body has a polygonal shape. Furthermore, a plate-shaped receiving plate having a through hole in the center is provided on the bottom surface of the locking member made of an elastic body. Further, the receiving plate is provided with a step. In addition, a female screw is formed in the through hole of the receiving plate.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a fall prevention device for a spring for a press die will be described in detail. A spring 1 for a press mold spring is provided to prevent a spring attached to the press mold from falling. A spring guide retainer 2 having a through hole 2a at the center for preventing the spring from falling inside the spring. A fixing bolt (commonly called cap screw bolt) 3 for fixing the spring guide retainer 2 to the press die; The color 4 formed in a shape and the color 4
A hole 5a having a central inner surface formed of a resilient material such as synthetic rubber provided in contact with the outer periphery of
And a cylindrical locking member 5 provided with the above. Note that the collar 4 may be provided separately.

Next, an example of use will be described. Punch holder P1 in upper die U attached to press machine (not shown)
Is fixed below the punching plate P3 fixed via the backing plate P2, and is fixed between the stripper plate P4 suspended on the punch holder P1 side and the backing plate P2 so as to be vertically movable with respect to the punching plate P3. This prevents the spring SP for plate holding pressure from dropping. First, the locking tool 5 is brought into contact with the collar 4, and the fixing bolt 3 is inserted into the through hole 2a and the hole 5a.
It is screwed into the backing plate P2 of the upper mold U and temporarily fixed. Thereafter, the bottom surface of the spring SP is inserted until it contacts the backing plate P2. Subsequently, the fixing bolt 3 is rotated, and the collar 4 gradually enters the lower portion of the hole 5a, so that the locking member 5 swells from the upper side (along the shape of a truncated cone) along the collar 4, P1 between lines
The spring SP can be prevented from falling when the upper mold U is attached to or removed from a press machine (not shown).

Next, another embodiment will be described below.
The spring 21 for the press mold spring is provided with the first
A spring guide retainer 22 and a fixing bolt 23 similar to those in the embodiment, a cylindrical collar 24 separately provided below the spring guide retainer 22, and a cylindrical elastic member provided on the outer periphery of the collar 24. 25 (R at the top
Processed).

The spring 21 for the press die spring can be changed in various sizes (outer diameter) by providing a cylindrical collar 24 as a separate body, and can correspond to springs of various sizes. Things.

The locking member 35 has a groove 35b on the outer periphery corresponding to the linear shape of the spring.
In this embodiment, three rows are provided in four directions, but there is no particular limitation.

The locking member 45 is formed by forming a spiral groove 45b on the outer periphery, and corresponds to the linear shape of the spring. Note that the pitch of the groove 45b may be adjusted to the pitch of the spring.

The locking member 46 has an octagonal outer periphery, and may have a quadrangular shape, a hexagonal shape, or the like, if necessary. It is fixed by biting.

The receiving plate 6 is in the form of a disc having a through hole 6a at the center and is located between the bottom surface of the locking member (the bottom surface of the spring) and the backing plate. This is to prevent damage.

The receiving plate 61 has a ring-shaped stepped portion 61 on its outer periphery.
b, which has an effect that a backing plate having a spring or a protrusion provided inside the stepped portion 61b can be securely held.

The receiving plate 62 is formed by forming a female screw 62a in a through hole, and is fixed by screwing a fixing bolt.
In particular, left and right abrasion can be prevented.

In each of the embodiments, urethane rubber is used as a material of the elastic locking member, but natural rubber, silicone rubber, elastic resin, and the like are also conceivable and are not particularly limited. Further, the vertical thickness of the locking member is set to be larger than the vertical thickness of the collar. Furthermore, the lateral size of the locking device and the lateral size of the collar may be determined according to the size of the spring to be held, and a vertical groove is provided, and the outer shape is made into a truncated cone or inverted truncated cone. And other polygonal shapes are also conceivable. Further, the material of the receiving plate may be stainless steel, synthetic resin, or the like, but is not particularly limited, and the shape may be another shape as long as it has a similar function.

[0017]

By rotating the fixing bolt and pushing down the tapered collar, it bulges out from the upper part of the locking tool, bites into the inner periphery of the spring gradually from the upper part, and fixes the fall of the spring. To prevent. 2. Separate tapered collars allow different sizes of collars to be attached, and different sizes of fasteners to be attached. 3. The cylindrical collar can be swelled from the center and fixed to the spring, so that the manufacturing can be inexpensive and the size can be set freely. 4. By providing a groove in the locking member, it can be fitted to a required position of the linear shape of the spring and securely fixed to the spring. 5. By providing a spiral groove in the locking member, it can be further fixed to the spring. 6. The polygonal shape of the locking member allows the corner to bite into the inner periphery of the spring and prevent the spring from falling. 7. By providing the receiving plate, the spring can be set without damaging the backing plate. 8. By providing the receiving plate with a stepped portion, a spring or the like can be held more reliably. 9. By forming a female screw on the receiving plate, left and right abrasion can be prevented.

[Brief description of the drawings]

FIG. 1 is a front view, partially in the center, of a fall prevention device for a spring for a press die according to a first embodiment of the present invention.

FIG. 2 is a diagram showing a mounting state of a fall prevention device for a spring for a press die according to the first embodiment of the present invention.

FIG. 3 is a view showing a use state of a fall prevention device for a spring for a press die according to a first embodiment of the present invention.

FIG. 4 is a partial longitudinal front view of a spring for a press die according to a second embodiment of the present invention;

FIG. 5 is a front view of a stopper of a spring for a press die according to a third embodiment of the present invention.

FIG. 6 is a front view of a stopper of a fall prevention device of a spring for a press die according to a fourth embodiment of the present invention.

FIG. 7 is a lateral end view of a stopper of a spring for a press die according to a fifth embodiment of the present invention.

FIG. 8 is a plan view of a receiving plate of a spring for a press die spring according to a sixth embodiment of the present invention.

FIG. 9 is a side view of a receiving plate of a fall prevention device for a press die spring according to a sixth embodiment of the present invention.

FIG. 10 is a view showing a use state in which a receiving plate of a fall prevention device of a spring for a press die according to a sixth embodiment of the present invention is set.

FIG. 11 is a vertical sectional side view of a receiving plate of a spring for a press die according to a seventh embodiment of the present invention;

FIG. 12 is a vertical sectional side view of a main part of a receiving plate of a fall prevention device for a spring for a press die according to an eighth embodiment of the present invention.

[Explanation of symbols]

 1 ---- Prevention device for spring of press die 2--Spring guide retainer 2a- Through hole 3--Fixing bolt 4--Collar 4a--Communication hole 5--Locking device 5a- -Hole

Claims (12)

[Claims] A spring guide retainer for preventing the spring from falling into the spring to prevent the spring from dropping; a fixing bolt for fixing the spring guide retainer to the press mold; and a spring guide retainer. It consists of a tapered collar provided at the lower part of the collar and an elastic locking member provided on the outer periphery of the collar.The fixing bolt is rotated and the tapered collar is pressed down to horizontally move the locking member made of the elastic body. A fall prevention device for a spring for a press die, characterized in that the spring is swelled to hold the spring. 2. The spring for a press die according to claim 1, wherein the tapered collar is provided separately below the spring guide retainer. 3. The fall prevention device for a spring for a press die according to claim 1, wherein the inner surface of the locking member made of an elastic body is formed in a tapered shape like a tapered collar. . 4. A spring guide retainer for preventing the spring from falling down, being attached to a press die, and a fixing bolt for fixing the spring guide retainer to the press die, and a spring guide retainer. A cylindrical collar provided separately at the bottom of the
It consists of an elastic locking member provided on the outer periphery of this collar, and the fixing bolt by rotating the fixing bolt and pushing down the cylindrical collar causes the elastic locking member to swell horizontally to hold the spring. A spring for dropping a spring for a press die. 5. A fall prevention device for a spring for a press die according to claim 4, wherein an inner surface of the stopper made of an elastic body is formed in the same shape as a cylindrical collar. 6. A groove is formed on the outer periphery of the elastic locking member.
A fall prevention device for the press die spring described. 7. The spring for a press die according to claim 6, wherein the groove is formed in a spiral shape. 8. The device for preventing a spring of a press die according to claim 1, wherein the outer periphery of the elastic member is circular. 9. The fall prevention device for a spring for a press die according to claim 1, wherein the outer periphery of the locking member made of an elastic body has a polygonal shape. 10. A plate-shaped receiving plate provided with a through hole in the center is provided on the bottom surface of the locking member made of an elastic body. 10. The fall prevention device for a spring for a press die according to 7, 8, or 9. 11. The stopper for a press die spring according to claim 10, wherein a step portion is provided on the receiving plate. 12. The fall prevention device for a spring for a press die according to claim 10, wherein a female screw is formed in a through hole of the receiving plate.