JPS6037225A - Shank holding device - Google Patents

Abstract

PURPOSE:To reduce the replacing time of a punch holder and to improve safety by attaching the punch holder only by lowering a press ram and detaching it by turning an operation handle. CONSTITUTION:When a ram 1 is lowered after inserting the upper end of a shank 33 into a shank hole 2, a sliding piece 31 is pushed up by the upper surface 34a of a punch holder 34. With the rise of the sliding piece 31, the pressing surface presses the outer peripheral surface 33a of shank 33 by a wedge action to hold the shank 33 by a sufficient pressing force. A claw 16b of locking member 16 is engaged with an annular groove 33b of shank 33 by the intrusion of shank 33, to mount the punch holder 34 on the ram 1. When a handgrip 13 of operation handle is thrown down forward for detaching the holder 34 from the ram 1; the claw 16b of locking member 16 is drawn back and an eccentric cam 10 is turned at the same time, to move a carriage 25 forward thereby lowering the slide rest 31. Accordingly, the pressing force for the outer peripheral surface 33a of shank 33 is eliminated, and the punch holder 34 falls by its own weight.

Description

[Detailed description of the invention] This invention relates to a shank presser device for use in a tank.

A conventional shank holder has a horseshoe-shaped groove cut into the lower surface of the ram of the press head that communicates with the shank hole, and a shank holder that removes the horseshoe shape is installed in the groove. This shank retainer is designed to press and hold the surface, and for the press head, this shank retainer is
It was held in place with multiple bolts.

However, with the structure described above, a large force is required to tighten the plurality of bolts provided on the shank holder in order to tighten the shank, and to prevent the shank from being pulled out. Additionally, there was a drawback that there was a risk of the mold falling due to insufficient tightening force or loosening of screws. The present invention has been made in order to eliminate the above-mentioned drawbacks, and the punch holder can be attached by simply lowering the press ram, and the punch holder can be removed by simply rotating the operating handle, and is safe. It is an object of the present invention to provide a shank presser device with improved performance.

Hereinafter, the present invention will be explained in detail based on an illustrated embodiment.

(1) is a ram of a general-purpose press, and a junk hole (2) for inserting a shank is bored in the center of the lower surface (1a) of this ram (]+ from below).

(3) is the main body of a shank holding device for removing the columnar shape, and the cross section of this main body (1) is approximately a horseshoe shape with the lower part of a circle cut off horizontally, and the cross section of the main body (1) is approximately a horseshoe shape with the lower part of the circle cut off horizontally. , and a horizontal mounting hole +51 (5) that is removably fitted into the horseshoe-shaped groove (4) communicating with the shank hole (2) and is bored near the left and right ends of the main body (3). It is tightened and fixed to the ram (++) with the tightening pole H61 (6) inserted into the ram (++).

A U-shaped front groove (7) is cut in the center of the front of the main body (3), and a lower groove (8) is cut in the center of the lower surface to connect with this. A horizontal shaft (9) is provided so as to pass through the main body (3) across the left and right sides.

An eccentric cam 00) having a slightly eccentric shaft hole (Joa) is integrally inserted into this horizontal shaft (9), and a hanging rod (nb) is connected at right angles to the rear end of the horizontal rod (11a). The lower end of the provided operating handle 01), which has an inverted character shape,
The eccentric cam 00) is fixed to the front end circumferential surface of the eccentric cam 00) with the QZ.

A grip θ3) is implanted at the front end of the upper surface of the horizontal rod (11a).

0→ is a horizontal circular hole bored in the main body (3), the rear opening (14a) of which is in communication with the recessed hole (2), and the front part of which has a rectangular shape with a smaller diameter. It communicates with the central portion through the small hole θω.

α0 is a locking member, which has an almost bottomed cylindrical shape with an open front surface, and has an arcuate claw portion (16a) on the rear end surface (16a).
6b) is provided protrudingly, and also on the top surface there is a long groove (
160) is cut, and a partition wall (16d) is formed downward in the cylinder near the bottom surface.

The locking member (161) is inserted into the circular hole 64J and a pin O passing through the upper surface of the main body (3).
n is provided, and the tip of this pin on is a long groove (16C)
, and restricts the rotation of the locking member (10).

(The government is a link that connects a short link (18a) and a long link (18b) to each other with an axis '(1!1), which is inserted horizontally into the small hole ++51, and which is
8a,) is inserted into a window hole (20) drilled in the center of the operating handle (11), and the front end of the horizontal shaft (21
).

The rear end of the long link (+sb) is pivotally attached to the partition wall (oid) of the locking member (10) with a pin Q2.

A compression coil spring Q3 is installed on the outer peripheral surface of the long link (+sb).
1 is wound, and this compression coil spring (by 231,
The locking member (1G is always biased toward the shank hole (2), and its claw (161)) is made to protrude into the shank hole (2).

Next, the mechanism for suppressing and holding the shank will be explained.

A receiving plate C241 is installed horizontally near the central opening of the lower groove (8) of the main body (3), and a slightly smaller diameter plate is slidably installed on the upper surface of the receiving plate T24) and the ceiling surface of the lower groove (8). The front end portion (25a) that has become a shape is inserted from the rear, and a roughly cubic carriage (251) is inserted.

On the lower left and right sides of the front end (25a) of the carriage c2■,
A pair of recessed holes (26+QQ) are drilled, and the upper end of a small diameter pin e passing through the receiving plate I24 is inserted into each recessed hole (A), and the carriage (251) is moved slightly back and forth. It is held so that it can be moved in any direction.

As shown in FIGS. 5 and 6, the carriage C! ■Back side (
25b) is formed into an inverted trapezoidal inclined surface, and a U-shaped groove t28) is cut along the center line,
A pair of pins 09 are provided on the left and right sides of the lower end of this groove aS+.
) are horizontally protruding.

A pair of guide plates (to), which are trapezoidal when viewed from the side, are fixed to the left and right opening edges of the groove (I28) so as to slightly narrow the opening of the groove (28). When viewed from above, a slide groove (28a) is formed in a 7-shape shape.

01) is a slide table having a trapezoidal shape with a vertical rear surface (aha) when viewed from the side, and a prismatic sliding piece (31b) is connected in the left-right direction at the upper end of the front side. , are slidably fitted into the slide groove (2sa) of the carriage e51 and are held vertically movably.

When the lower surface of the sliding piece (alb) is lowered, it comes into contact with the pin e (g) to prevent the slide base 01 from falling.

In the center of the rear surface (31a) of the slide table 01), an arcuate holding surface (3 holes is cut out, and a shank 03 to be described later) is provided.
The outer circumferential surface (33a) of

As shown in phantom lines in FIG. 3, the shank 031 that stands up from the upper surface (34a) of the punch holder c34 has a chamfered upper edge and an annular groove (33b) cut slightly below the upper surface. The locking member (10 claws (x6b)) is engaged with this annular groove (33b).

Next, the operation of the shank presser of the present invention constructed as above will be explained.

The upper end of the shank l33) of the punch holder (34),
When the ram (1) is slightly inserted into the shank hole (2) and the ram (1) is lowered, the shank (g) relatively enters the shank hole (2) and the upper surface (34a) of the punch holder 04)
, pushes up the slide table 01).

As the slide table 01) rises upward, the presser surface (31a) presses the outer peripheral surface (33a) of the shank C (31) due to the wedge action, and the punch holder 04 presses the ram (1+).
The shank 03) is held with sufficient pressing force between the ram (11) and the slide base (3+) at the position where it abuts against the lower surface of the ram (11).

In this state, the carriage C15) receives a force in the forward direction, but does not move because its front end surface is in contact with the eccentric cam 00).

The claw (16b) of the locking member Q61 is once pushed back forward by the entry of the shank (33b), but is returned by the biasing force of the compression coil spring (23), and the claw (16b)
is engaged with the annular groove (33b) of the shank c33), and as shown in FIG. 3, the punch holder 04) is mounted on the ram (1).

Next, to remove the punch holder 04) from the ram (1),
As shown in Fig. 4, the grip (1) of the operating handle (11)
When you suddenly apply your hand and tilt it forward against the biasing force of the compression coil spring (23), the claw (z6b) of the locking member (16) is retracted and the eccentric cam 0α rotates, causing the reciprocating The stand c2m moves forward and the slide stand 61) descends slightly.

Therefore, there is no pressing force against the outer peripheral surface (33a) of the shank G, and the punch holder 04) falls under its own weight, so it can be easily removed.

As described above in detail, the shank holding device of the present invention is such that when the operating nozzle is in the locking position, the forward movement of the carriage is prevented by the eccentric cam, and the upper surface of the punch holder inserted into the shank hole is , the shank is pressed by the wedge action when the slide table is raised, and
The shank is held together with the engagement of the locking member, and when the operating nondle is at the take-out position, the slide base and the locking member are no longer engaged with the shank, and the punch holder is taken out. This has the advantage that the punch holder can be easily attached and operated.

In addition, unlike in the past, the work of inserting and removing the shank body into the insertion groove is done only during installation, so there is an advantage that the time required to replace the punch holder can be shortened.

Furthermore, in the present invention, the engagement of the pawl of the locking member with the annular groove of the shank prevents the press die from falling, so it has an advantage in terms of safety compared to conventional ones. There is.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an embodiment of the present invention, and FIG. 4 is a front view showing an embodiment of the present invention.
FIG. 3 is a vertical cross-sectional view showing a state in which the operating handle is rotated; FIG. 5 is a plan view showing only the reciprocating table and slide table shown in FIG. 4; and FIG. 6 is a side view. (1) Ram (2) Shank hole (3) Main body (8) Lower groove (10) Eccentric cam θ1) Operation nondle 06) Locking member (23) Compression coil spring 051 reciprocating stand 01) Slide stand (G) Shank 04) Punch holder Fig. 1 Fig. 3 Fig. 4 Lying ・34 Fig. 5 630 Fig. 6

Claims (1)

[Claims] In a shank holding device of a punch holder that is removably inserted into an insertion groove that communicates with a shank hole drilled in the center of the lower surface of a ram of a press, a lower groove in the front-rear direction with an open lower surface is cut in the lower surface. an eccentric cam integrally fitted to the shaft; a base end pivotally attached to the shaft and locked; an operating nondle that is rotatable between positions and a take-out position, and is housed in a horizontal hole passing through the main body toward the shank hole, and has a front end linked to the operating handle and a rear end connected to the shank. a locking member that is constantly biased toward the shank so as to be removably engaged;
It is stored in the rear part of the lower groove so that it can be moved slightly forward and backward,
and a reciprocating table whose front surface faces the eccentric cam and whose rear surface is formed with an inclined surface, and whose front surface abuts on the reciprocating table in a vertically slidable manner, and whose rear end surface faces the outer circumferential surface of the shank. A shank holding device, comprising: a sliding base; the shank of the punch holder is held by the pressing force of the sliding base against the outer circumferential surface of the shank due to a wedge action, and by the engagement of the locking member with respect to the shank.