JPS5919534Y2 - Eyeless needle caulking device - Google Patents

Description

[Detailed description of the invention] The present invention relates to an eyeless needle caulking device equipped with a pair of pressing molds, a fixed mold and a movable mold, and in particular, a return mechanism for urging the movable mold in a direction backward from the fixed mold. Regarding improvement of parts.

Generally, caulking devices are equipped with a pair of pressing dies, a fixed die and a movable die, and during caulking, the movable die is advanced toward the fixed die, while after caulking is completed, the movable die is moved back by a return spring or the like. The configuration is such that the movable type moves backward in conjunction with a fixed ram.

There have been various return mechanisms that use return springs to retract the movable type, but in the case of the eyeless needle caulking device, the eyeless needle, which is the member to be caulked, has an extremely small diameter. Since both molds are extremely thin and section-like, it has been extremely difficult to return the spring to the movable mold.

In particular, the above-mentioned crimping pattern is replaced each time depending on the thickness of the eyeless needle and the type of thread, but in that case,
In order to smoothly replace the movable die, it is necessary to connect the return spring to the movable die.

This invention was developed in view of the above circumstances.
To provide a caulking device which allows a return spring to be easily attached to and removed from a movable die and adjusts the strength of the spring force when replacing the caulking die.

Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a base body, and a fixed mold 2 is fixedly held in the U-shaped groove portion of the base body 1 by being positioned on one inner wall portion thereof, and from the other inner wall portion, a cylinder portion 1a of the base body 1 is fixedly held.
(See FIG. 2) The tip of the movable mold 3 that is slidably inserted into the mold protrudes, and the movable mold 3 can freely move forward and backward relative to the fixed mold 2.

Further, the base body 1 holds a ram 4 on the rear end side of the movable mold 3 for pressing the movable mold 3 toward the fixed mold 2 by receiving a pressing force from an appropriate drive source. .

A locking groove 3a is formed on the upper surface side of the rear end of the movable mold 3, as shown in FIG. It's coming.

In order to bias the movable mold 3 in the direction of retreating from the fixed mold 2, a substantially π-shaped return spring 5 is adjustably provided on the base body 1.

As is clear from FIGS. 4 to 7, this return spring 5 is formed by bending a wire to form a pair of arm portions 5a, 5a and a base portion 5b connecting the pair of arm portions 5a, 5a. and has.

The return spring 5 has a base portion 5b that passes through the through hole 1b of the base body 1, is located in the locking groove 3a of the movable mold 3, and is located between the pair of arm portions 5a, 5a. 3
and the base body 1 are arranged.

The distal end portions of the pair of arm portions 5a, 5a are temporarily fixed to the base body 1 using an adjustment pin 6 and a lock bolt 7, which will be described later.

Note that the base 5b is bent 90° inward to form the arms 5a, 5a after both ends thereof are bent inwardly by 180°.
By bending, hook portions 5c, 5c are formed which protrude to the sides of the a portions 5a, 5a.
By hooking the index finger on one side of C and the middle finger on the other side, the base 5b can be moved in and out of the locking groove 3a.

As shown in FIGS. 8 and 9, the adjustment pin 6 has a flange portion 6a at a position slightly offset toward one end from its axial center, and has a pair of flange portions on both ends that press parallel to each other. It has insertion holes 6b, 6b.

The diameter of the insertion holes 6b, 6b is considerably larger than the arm portions 5a, 5a of the return spring 5.
Grooves 5c, 5 slightly larger than the diameters of the arm portions 5a, 5a are formed on each end surface of the adjustment pin 6 so as to communicate with the arms 5a, 5a, respectively.
c is formed.

Such an adjustment pin 6, as shown in FIG.
It is rotatably inserted into a stepped hole 1C formed in the base body 1,
The flange portion 6a is aligned within the large diameter portion of the stepped hole 1C.

Then, an adjustment pin 6 located on one side of the base 1
The tip of the arm portion 5a on one side of the return spring 5 is inserted into the insertion hole 6b on one side using the groove 6C, and the insertion hole 6b on the other side located on the other side of the base 1 is inserted into the insertion hole 6b on the other side. The tip of the other arm portion 5a of the return spring 5 is inserted through the groove 6C.

After this insertion, by slightly rotating the adjustment pin 6 and bending the portion of each arm portion 5a, 5a near the adjustment pin 6, the arm portions 5a, 5a are inserted into the insertion holes 6b, 6b.
In this position, the flange portion 6a of the adjust pin 6 is pressed against the base body 1 by the lock bolt 7 screwed onto the base body 1 as shown in FIG. 10, and the adjust pin 6 is prevented from rotating. In addition, it is intended to prevent removal from the stepped hole 1C.

The return spring 5 installed in this way is attached to the adjustment pin 6
The arm portion 5a is fixed with the mounting portion thereof as a fixed fulcrum.
, 5a has a biasing force in the counterclockwise direction in FIG.

As is clear from the above description, this biasing force is finely adjusted by changing the rotational position of the adjustment pin 6, that is, by changing the fixed position of the arm portions 5a, 5a.

Here, the return spring 5 is attached to the base body 1 by inserting one arm portion 5a into the through hole 1b, and removed by performing the reverse procedure.

However, if the through hole 1b is extended further upward and a notch is provided in the upper end surface of the base body 1 instead of the through hole 1b, the return spring 5 can be attached to the base body 1 more smoothly. can be done.

When replacing the movable mold 3, loosen the lock bolt 7 and slightly pull out the arm portions 5a, 5a of the return spring 5 from the adjustment pin 6, so that the base portion 5a is inserted into the locking groove 3a of the movable mold 3. Then, the movable mold 3 is pulled out from the cylinder portion 1a, and then a new movable mold 3 is inserted into the cylinder portion a, and the rest is reassembled as described above.

As is clear from the above description, in the present invention, the movable mold is fitted into a cylinder provided on the base, so that the movable mold is firmly held on the base, and there is no chance of the movable mold being cut or damaged.

Further, the return spring and the movable mold can be connected to each other with a simple structure in which the base of the return spring is hooked to a locking groove formed in the movable mold.

Furthermore, since the end of the arm of the return spring is simply inserted into the insertion hole of the adjustment pin, simply moving the return spring slightly in the longitudinal direction of the arm allows the movable die and return spring to be connected and uncoupled. can be done easily.

The above-described π-shaped return spring is just one example, and the present invention is not limited to this, and may be an n-shaped, eye-shaped, or rhomboid-shaped rod or plate. Of course, it is fine as long as it achieves the purpose of

[Brief explanation of drawings]

Figure 1 is a side view of the main parts of the device of the present invention, Figure 2 is Figure 1 II
-II line sectional view, Figure 3 is a side view of the movable type, Figure 4 is a front view of the return spring, Figure 5 is a side view of Figure 4, and Figure 6 is an enlarged cross section taken along Figure 1 line VI-VI. Figure 7 is an enlarged perspective view showing the connecting part between the movable die and the return spring, Figure 8 is a front view of the adjustment pin, Figure 9 is a side view of Figure 8, and Figure 10 is Figure 1 x. - It is an X-ray sectional view. 1... Base body, 1a... Cylinder part, 1
b...Through hole, 1C...Stepped hole, 2.
...Fixed type, 3...Movable type, 3a...
... Locking hole, 4 ... Ram, 5 ... Return spring, 5a ... Arm part, 5b ...
Base, 5C...Hook part, 6...Adjust pin, 6a...Flange part, 6b...
...Insertion hole, 6C...Insertion groove, 7...
rock bolt.

Claims (3)

[Scope of utility model registration request] (1) A base body, a fixed mold provided on the base body, a movable mold that is slidably inserted into the cylinder portion of the base body and can move forward and backward with respect to the fixed mold, and the movable mold is connected to the fixed mold. and a return spring biased in a direction away from the movable mold, the base of the return spring being located in a locking groove provided in the movable mold, and between the pair of arm portions of the movable mold and the movable mold. With the base body in position, the tips of the arm portions are respectively disposed on the side surfaces of the base body, and the biasing force of the return spring is applied by adjusting pins that are inserted through the arm portions and rotatably attached to the base body. An eyeless needle caulking device characterized by being adjustable. (2) An insertion hole that penetrates through the base body and is rotatably attached, and that the arm portion of the spring is returned to both ends thereof is configured to be perpendicular to the axis, and that the insertion hole is rotated around the axis. Utility model registration claim 1 characterized by having an adjustment pin that can adjust the biasing force of the return spring by
The eyeless needle caulking device described in Section 1. (3) An energizing force is applied by bending the arm portion of the return spring inserted into the insertion hole of the adjustment pin, and the movable type of the eyeless needle is provided by hook portions formed at both ends of the base portion connecting the arm portions. The eyeless needle caulking device according to claim 1, which is characterized by having a return spring that facilitates attachment to the eyeless needle.