JPS5940984Y2 - Clamper of processing machine - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to clampers for various processing machines, and aims to provide a clamper that facilitates the replacement of tools, etc. of the processing machines, has a simple structure, and is inexpensive.

Conventional clampers are used to secure tools and workpieces to processing machines in metal knives, die-casting machines, injection molding machines, machine tools, etc. (hereinafter referred to as processing machines). There was a drawback.

That is, although processing machines have high versatility and their tools are frequently replaced, it is not easy to replace the tools.

For example, in the case of a clamper equipped with a lever-type clamp arm, the clamp arm protrudes above the tool, etc.
Unless the clamper is moved backwards or removed, tools etc. cannot be removed.

Also, for example, as a mold clamper for an injection molding machine,
As shown in FIG. 5, there is a structure in which an inclined bin 20 is moved forward and backward by a hydraulic cylinder to be clamped.

In the case of this clamper as well, since the support arm 21 protrudes from the upper housing of the mold, the direction in which the mold can be attached and removed is restricted.

Furthermore, machining of the inclined pin holes 20a and the inclined hydraulic cylinders drilled in the support frame main body 22 is difficult and expensive because the machining is oblique.

In order to solve the above-mentioned drawbacks, the present invention provides a clamper that is equipped with a clamp claw that can move in and out of the clamper body, and that can be manufactured at low cost with a simple structure.

Embodiments of the present invention will be described below based on the drawings.

As shown in FIGS. 1 to 4, the clamper C has a clamper main body 2 installed in a T groove 1 of a bolster B of a processing machine (not shown).
The leg portions 2a are attached, and the mold is pressed and fixed to the bolster B by the clamp claws 3.

First, the upper surface of the bolster B, which is the reference for mounting the mold, is the mounting reference surface P of the clamper C, and a cylindrical hole parallel to the mounting reference surface P is inserted into the upper part of the front half of the clamper body 2 in the front-rear direction. A sliding guide hole 4 is provided therethrough, and an operating shaft 5 is slidably inserted into the guide hole 4. The operating shaft 5 is connected to a drive device M and is configured to slide forward and backward. Ru.

The drive device M is formed from a piston chamber 6, a piston I, a drive spring 8, and the like.

That is, a piston chamber 6 is formed concentrically with the guide hole 4 in the upper center of the rear half of the clamper main body 2, a piston I is inserted into this piston chamber 6, and the piston I is connected to the operating shaft 5. A spring seat 9 is formed integrally with the rear end of the piston 1 and deeply recessed from the rear end surface of the piston 1, and a strong driving spring 8 is compressed between the spring seat 9 and the clamper main body 2 within the spring mounting chamber 6a. to be installed in the state.

The part in front of the piston 7 in the piston chamber 6 is an oil chamber 6b, and an oil passage 10 communicating therewith is connected to the clamper main body 2.
It is installed transparently from the left side of the holder and is connected to a hydraulic pressure supply device (not shown) via a hydraulic hose 10a.

In its advanced position, the actuating shaft 5 is advanced with its leading end 1 forward of the leading end 4a of the guide hole 4, and in its retracted position, its leading end surface 5a is in front of the leading end 4a of the guide hole 4. It is formed so as to be retracted rearward from 4a.

An inclined pressing surface 11 is formed on the lower surface of the actuating shaft 5 extending from the front end toward the center thereof and facing the mounting reference surface P in a backward downwardly inclined shape.

The clamp claw 3 is supported by the guide pin 12 so as to slide back and forth while being guided by the guide pin 12 while keeping its upper surface in contact with the inclined pressing surface 11. A biasing spring 13 externally attached to the guide pin 12 presses and biases the clamp claw 3 forward.

The front part of the clamp claw 3 is thick and formed into a substantially partially convex cylindrical surface, the rear part of the clamp claw 3 is formed thin and concave upward, and the rear end has a locking part 3a that protrudes downward. is formed.

The recessed portion 14 for advancing and retreating the locking portion 3a is the guide hole 4.
A stopper 15 is formed on the front side of the recess 14 to support the locking part 3a from the front and prevent the clamp claw 3 from advancing excessively.

In order to restrict the rotation of the operating shaft 50, a regulating pin 16 extending horizontally to the right from the operating shaft 5 is inserted into a regulating hole 17 provided transparently in the clamper body 2.

Further, the tip of the regulating pin 16 is made to protrude outside the right side of the clamper main body 2 to serve as a contact for a control limit switch 18.

Incidentally, the clamper main body 2 is fixed to the bolster B via a fixture 19 at the rear end.

Next, the operation of the clamper C will be explained.

When replacing the mold of the processing machine, as shown in FIG. 4, pressurized oil is supplied to the oil chamber 6b, the operating shaft 5 is placed in the retracted position, and the mold is replaced.

After that, when clamping the mold, as shown in FIG. 2, when the pressure oil in the oil chamber 6b is released, the actuating shaft 5 moves forward due to the elastic force of the drive spring 80, and the clamp claw 3 moves forward. The upper housing of the mold advances, and the locking portion 3a is locked with the stopper 15.

When the actuating shaft 5 further advances, it slides between the clamp pawl 3 and the slope suppressing surface 11, and the clamp pawl 3 is pushed downward by the pressing action of the slope pressing surface 11, and the spring force of the drive spring 8 is applied to the slope pressing surface 11. The mold is strongly clamped by the large pressing force generated by the wedge action of 11.

In addition, as a modification of the above, the spring mounting chamber 6a of the piston chamber 6
Also, by making it possible to supply pressure oil, the clamping force can be generated by the drive spring 8 and the oil pressure.

Since the present invention is configured as described above, it has the following effects.

In other words, the clamper's operating shaft is slid back and forth within the sliding guide hole via a drive device, and the tip of the operating shaft is moved in and out of the sliding guide hole, making it easy to replace tools, etc. of the processing machine. When doing so, the tip of the operating shaft is retracted from the tip of the guide hole, and the clamper is moved out of the side edge of the tool, etc., so that the clamper does not get in the way and the tool, etc. can be easily replaced. .

In the past, a clamp claw was provided that slidably contacted the tilt suppression surface of the operating shaft, and the structure was such that the operating shaft was clamped via this clamp claw, so the shape of the attachment part for tools, etc. had to be machined into a special shape. There's no need.

In addition, the clamper has a simple structure, and the sliding guide hole and piston chamber are formed parallel to the mounting reference plane and are not inclined with respect to the clamper body, making it easy to cut. Therefore, it can be easily manufactured at low cost.

[Brief explanation of drawings]

The figures show an embodiment of the present invention, and Fig. 1 is a vertical sectional side view of the main part;
Figure 2 is a plan view of the main part, Figure 3 is a sectional view taken along the line ■-■ in Figure 1, and Figure 4 is a portion corresponding to Figure 1 when the operating shaft is in the retracted position. Figure 5 is a diagram of the conventional clamper. It is a longitudinal side view of the main part. P... Mounting reference plane, M... Drive device,
2... Clamper body, 3... Clamp claw, 3a... Locking part, 4... Sliding guide hole, 4a...・Tip part, 5... Actuation shaft, 11... Inclined pressing surface, 15...
·stopper.

Claims (1)

[Scope of utility model registration request] A sliding guide hole 4 is formed in the clamper main body 2 parallel to its mounting reference plane P, and an operating shaft 5 is inserted into the sliding guide hole 4 so as to be able to slide forward and backward. The actuating shaft 5 is interlocked with the actuating shaft 5, and the leading end of the actuating shaft 5 is inserted into the sliding guide hole 4.
The tip portion 4a of the actuating shaft 5 is configured to move in and out, and an inclined suppressing surface 11 is formed on the side surface of the mounting reference surface P side of at least the forward portion of the actuating shaft 5, and the inclined pressing surface 11 extends from the tip portion to the rear end portion. It is formed into an inclined surface that approaches the mounting reference surface P as it approaches, and is brought into contact with the inclination suppressing surface 11 so as to be able to freely slide forward and backward with the clamp claw 3.
A clamper for a processing machine characterized in that a locking part 3a formed at the rear of a clamp claw 3 is received by a stopper 15 fixed to a clamper main body 2 so as not to extend excessively.