JPS5922725Y2 - call line - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a call line used when an electric wire or the like is inserted or wired into a pipe.

Conventional call wires are used by bending the tip of a flat steel wire and connecting the wire to be routed to the bent portion, but since the wire is always kept straight, it is difficult to use a bent wiring path. Moreover, since it is made of spring steel, it not only has a poor service life but also has the risk of being splashed and causing injury to workers.

The purpose of the present invention is to eliminate such drawbacks, and the features of the present invention are that a hooking hole is provided for connecting the wired materials, an insertion hole is bored at the base end, and the insertion hole is A thermoplastic synthetic resin having a connecting fitting having a recess or hole mounting portion extending from the inside toward the outer circumference, and a distal end bulging portion that is inserted into the insertion hole of the connecting fitting and coupled to the mounting portion. It consists of a main wire made of wire material, and a main wire made of wire material.

To explain the parts showing the embodiment, 1 is a main wire made of a flexible thermoplastic synthetic resin wire material such as vinyl chloride resin or polyethylene resin, and 2 is attached to the tip of the main wire 1. This is a bullet-shaped metal connecting fitting.

A locking hole 3 is formed at the distal end of the connecting fitting 2, and an insertion hole 4 is formed from the proximal end surface toward the locking hole 3 to the extent that it does not communicate with the locking hole 3. A mounting portion 5 is provided, which is a hole that penetrates the outer circumferential surface of the connecting fitting 2 from all sides of the deepest part of the insertion hole 4.

Note that the mounting portion 5 is not limited to a hole, but may be formed in a groove or a recess toward the outer circumferential surface of the connecting fitting 2.

As shown in FIGS. 1 and 2, it is also preferable to provide a threaded portion 6 for a screw or the like carved on the inner circumferential surface of the insertion hole 4.

When the connecting metal fitting 2 formed in this way is heated by putting it on a fire and the tip of the main wire body 1 is inserted into the insertion 7L4, the main wire main body 1 is made of a thermoplastic synthetic resin wire material. It softens and melts when heated, a part of which bulges out and flows into the attachment part 5 of the connecting metal fitting 2, cools and solidifies in that state, and the connecting metal fitting 2 is continuously attached to the tip of the main wire body 1. It is.

That is, a bulge is formed at the tip of the main wire main body 1, and this bulge at the tip is coupled to the attachment portion 5 of the connecting fitting 2.

As shown in FIG. 2, when the mounting portion 5 is formed with an appropriate number of holes in the radial direction, the tip of the main body 1 of the main wire 1, which expands and flows into the holes by heating and solidifies after being cooled, becomes as follows. Of course, it cannot be pulled out even if it is strongly pulled in the axial direction, and it is not rotatable around the axis, so it can be extremely firmly fixed to the connecting fitting 2 completely and integrally.

The striped portion 6 carved on the inner circumferential surface of the insertion hole 4 further strengthens the fixation.

In addition, as described above, when the mounting portion 5 is made into a recess from the inside of the insertion hole 4 toward the outer circumference, the swell that expands and flows into this recess due to heating, and then cools and solidifies. The distal end of the linear body 1 is connected to the connecting fitting 2 so as not to be pulled out even if it is strongly pulled in the axial direction, and is rotatable about the axial center.

Although the welding force between the inner circumferential surface of the attachment part 5 of the metal connecting fitting 2 and the tip of the nominal wire upper body 1, which is made of synthetic resin, is generally small, due to the welding force, the During the latest period, they cannot rotate, but if they have been used for a certain period of time, there is a chance that rotational force will act around the axis, and after that, they may be able to rotate around the axis. , depending on the degree of bulge in the insertion hole 4 and the mounting part 5, and the material of the nominal wire body 1, etc., it may be rotatable from the time it is new, or it may be rotatable after a predetermined period of use, or it may be rotatable for a long period of time. Even after use, there are cases where the parts stick together.

As described above, in the present invention, the nominal wire upper body 1 is formed from a thermoplastic synthetic resin wire material, which prevents electric shock accidents and has a long-term lifespan without rusting, unlike conventional nominal wires made of spring steel. Not only can it withstand use, but it also adapts well to curved wiring paths and can be pushed in and pulled out smoothly to perform wiring work efficiently, and it also has a connecting fitting that is fixed to the tip of the nominal wire body 1. 2 is provided with a mounting portion 5 such as a recess or hole from the inside of the tip of the insertion hole 4 provided at the base end toward the outer circumference, so that the nominal wire upper body 1 made of a thermoplastic synthetic resin wire material is heated. When welded, the fitting part 5 swells and flows into a hollow state, allowing the two to be easily and firmly connected.Furthermore, since the hooking hole 3 is bored at the tip of the connecting fitting 2, this It is possible to reliably connect the electric wires to be wired to the hooking hole 3, and if necessary, it is possible to cut the nominal wire body 1 to an appropriate length and easily attach a desired connecting fitting to the end thereof. It is possible.

Also, depending on the purpose of the call line, if the mounting part 5 is made into a recess, it can be rotated freely around the axis without being pulled out in the axial direction, causing twisting of wired materials such as wires and cables. Even if the connecting fitting 2 is rotated freely, the torsion is automatically restored, and the wired material can be smoothly pulled out.

On the other hand, when a particularly strong axial force is required,
The mounting portion 5 may be made into a hole as shown in FIG. 2 so that it cannot rotate.

In this way, the attachment part 5 can be easily changed to create a call line that can be applied to an extremely wide range of uses, and it can be said that the practical effects of the present invention are significant.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is an exploded perspective view thereof, and FIG. 2 is a longitudinal sectional view thereof. 1...Nominal line upper body, 2...Connection fittings,
3...Latching hole, 4...Insertion hole, 5...
...Mounting part.

Claims (1)

[Claim for Utility Model Registration] A hooking hole 3 is provided to connect the wired materials, an insertion hole 4 is bored at the base end, and a recess or hole is installed from the inside of the insertion hole 4 toward the outer periphery. A connecting fitting 2 provided with a portion 5; and a call wire main body 1 made of a thermoplastic synthetic resin wire material having a swollen end portion that is fitted into an insertion hole 4 of the connecting fitting 2 and coupled to the mounting portion 5. A call line consisting of and .