JPS6233481Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement in a call line used when wires, cables, etc. are inserted or wired into pipes.

Conventionally, call wires used to introduce and route wires such as electric wires and cables into pipes are used by bending the tip of a flat spring steel and connecting the wires, etc. to be routed to the bent part. I've done it. but,
Spring steel always has an excessive force to keep it in a straight state, making it difficult to pass through a bent tubular body, resulting in fatigue damage from bent parts, rusting of the entire body, and strong splashing during use. There were many drawbacks such as the risk of injury to people and the risk of electric shock.

On the other hand, a call line in which the entire call line body is made of a solid plastic wire and a metal fitting is welded to the tip has been proposed, but this welded connection part cannot withstand the strong tensile force and may break. This has disadvantages such as poor durability and the need for a high-grade plastic material to have an appropriate repulsion force (linear restoring force) and a sufficiently large tensile force.

Furthermore, in cases where a connecting metal fitting is used at the tip of the nominal wire, the nominal wire is inserted from the proximal end of the connecting metal fitting into the hollow interior of the connecting metal fitting, and is bent inside so that the nominal line cannot be pulled out from the connecting metal fitting. The disadvantage was that it was time consuming and not easy for anyone to do because it was connected in a similar way.

The present invention eliminates these drawbacks, does not cause electric shock, does not cause rust, does not stain indoor walls, etc., is inexpensive to manufacture, has strong tensile force, and is easy to install for induction connecting fittings. To provide a call line that can be easily and quickly replaced and repaired. Therefore, the feature of the present invention is that in a call line consisting of a call line main body and a guiding connecting fitting attached to the tip thereof, the call line main body has a metal core wire for repulsion and tensile reinforcement, and sliding friction. The induction connecting fitting is integrally formed with a synthetic resin coating layer for reducing resistance.
It consists of a latching head for latching the wiring material, a connecting fitting body with a screw hole formed on the base side, a terminal terminal having a small hole through which the core wire is inserted, and a male thread protrusion that is screwed into the screw hole. , insert the core wire at the tip of the call wire body from which the coating layer has been peeled off by a predetermined length from the base end of the small hole of the terminal terminal, and crush or bend the protruding part to use as a retaining part to attach the call wire to the terminal terminal. The main bodies are connected to each other, and the external threaded protrusion of the terminal terminal is screwed into the screw hole of the connecting fitting main body to connect the main body, and the call line main body and the guiding connecting fitting are connected. be.

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

In FIGS. 1 and 2, the call line consists of a guiding connecting fitting 21 and a call line main body 3.
This is a wire in which a metal core wire 1 such as a piano wire and a synthetic resin coating layer 2 are integrally formed. The guide connecting fitting 21 is composed of a connecting fitting main body 6, a latch head 10 integrated therewith, and a terminal terminal 4 on the base side. The terminal terminal 4 has a recess 17 on the proximal side,
The other end has a male screw protrusion 22 in a protruding manner. A small hole 5 is inserted through the recess 17 from the back to the tip side, and the recess 17 and the small hole 5 form a stepped hole. Further, the connecting fitting main body 6 has a screw hole 15 on its base end surface into which the male threaded protrusion 22 is screwed,
Moreover, when screwing, a vacant space 25 is formed in the deep part of the screw hole 15.
The depth of the screw hole 15 is set to be large so that the screw hole 15 is formed. The latching head 10 at the other end has a latching hole 8 into which a wiring member 7 shown in FIG. 4, which will be described later, is latched.

Therefore, the metal core wire 1 made of piano wire or the like of the call line main body 3 applies a repulsive force to directly restore the shape after being bent and a tensile force when the wiring material 7 is strongly drawn into the main body 3 as a whole. It can be said that it is used for both repulsion and tensile reinforcement. Furthermore, the synthetic resin coating layer 2 covering the core wire 1 is used for sliding frictional resistance to reduce frictional resistance when sliding on the inner surface of the pipe 20 (as shown in FIG. 4), and for rust prevention. It also has the role of adding appropriate flexibility to the body so as not to strain the body, and also has electrical insulation properties.

Next, the coating layer 2 is peeled off by a predetermined length from the tip of the reference wire main body 3, and the exposed tip of the core wire 1 is
As shown in FIG. 1, the terminal terminal 4 is inserted into and projected from the recess 17 into the small hole 5, and the tip of the coating layer 2 is fitted into the recess 17 over a minute range of dimensions. Therefore, as shown by the imaginary line in the same figure, the core wire 1 protruding from the tip end surface of the male thread protrusion 22 is bent to form a retaining hook 23 to firmly connect the terminal terminal 4 and the nominal wire main body 3 together. Link. Note that it is also preferable to crush the tip end of the core wire 1 to form the hook portion 23 (details not shown).

Thereafter, as shown in FIG. 2, the male screw protrusion 22 of the terminal terminal 4 is screwed into the screw hole 15 of the connecting fitting main body 6 to assemble the guiding connecting fitting 21, and the connecting fitting 21 is attached to the tip of the nominal line main body 3. It fixes.
At this time, since the depth of the screw hole 15 is sufficiently large as described above, the hollow part 25 is formed, and the hooking part 23
is stored.

Next, in another embodiment shown in FIG. 3, 9 is a washer, and when connecting the terminal terminal 4 and the nominal wire main body 3 as explained in FIG. 9 and then bent or crushed so that the terminal terminal 4 and the nominal wire main body 3 mutually rotate around their axes via the wire 9,
It is assumed that the structure is connected. Therefore, the inner diameter of the small hole 5 into which the core wire 1 is loosely fitted so as to be freely rotatable is set to be slightly larger than the outer diameter of the core wire 1.

Next, in another embodiment shown in FIG. 4, the connecting fitting main body 6 and the latch head 10 are composed of two members connected by a mutually rotatable twisting mechanism 11. The other configurations are the same as those in FIGS. 1 to 3. In addition, FIG. 4 shows a state in which a wiring material 7 such as an electric wire or cable is connected to the hooking hole 8 and drawn into the piping 20 by a call line.

Furthermore, in another embodiment shown in FIG.
The coating 19 is peeled off by a predetermined length from the tip of the wiring material 7 consisting of the wiring material 2 and the coating 19, and the exposed core wire 12 is provided with a recess 18 on the proximal end surface and a male thread protrusion 24 protruding on the other end. The covering 19 is inserted into the recess 18 of the terminal terminal 13 and the recess 18 of the small hole 14 and the stepped hole, and the covering 19 is fitted into the recess 18, and the tip of the inserted core wire 12 is It is crushed or bent to form a connected shape so as not to be pulled out in the axial direction, and the connected terminal terminal 13 is screwed into a screw hole 16 formed in the end surface of the latching head 10 and connected.

To use the call line according to the present invention described above,
First, the connecting fitting main body 6 connected to the tip of the call line main body 3 is inserted into the pipe 20 first, and is caused to protrude from the other end. Then, the wiring material 7 is connected to the hooking hole 8 at the tip thereof, and the calling line main body 3 is pulled to pull the wiring material 7 into the pipe 20, so that the wiring material 7 is inserted into the pipe 20.

Conventional call wires whose entire call line body was made of synthetic resin required expensive synthetic resin whose repulsive force (direct restorability) was tensile force, but the present invention has the ability to combine repulsive force and tensile force. Since the core wire 1 is made of a metal core wire 1 such as a piano wire, the coating layer 2 can be made of an inexpensive material such as nylon, making it possible to provide the nominal wire at a low cost. Furthermore, the sliding friction resistance is reduced due to the lubricity of the coating layer, so that it is relatively light and can be passed through even curved piping passages. Also, unlike conventional methods, it does not repel too strongly. In addition, the core wire 1 is inserted into the small hole 5 of the terminal terminal 4, the covering layer 2 is fitted into the recess 17, and the tip of the inserted core wire is crushed or bent with the exposed end to form a retaining hook portion 23. Since the terminal terminals 4 are connected so that they cannot be pulled out in the axial direction, and the connected terminal terminals 4 are screwed into the screw holes 15 and connected, the connecting work is significantly facilitated. In other words, the difficulty of inserting the calling wire from the proximal end of the connecting metal fitting into the hollow interior of the connecting metal fitting and performing the bending operation inside the connecting metal fitting as in the conventional method can be eliminated. In addition, since the coating layer 2 is fitted into the recess 17 and further fixed in the axial direction by the retaining hook 23, there is no play in the axial direction, and the step between the core wire 1 and the coating layer 2 is prevented. Since it is not exposed, the step does not hang over the corner of the curved piping passage. In addition, as shown in FIG. 3, a washer 9 made of a synthetic resin having sliding properties is provided between the male screw protrusion 22 of the terminal terminal 4 and the locking part 23, so that the call line main body 3 can be freely rotated. Therefore, the twist in the wiring material 7 can be removed during wiring, and this reduces the frictional resistance between the inside of the piping 20 and the wiring material 7, so that wiring or wiring work can be done very smoothly.

In addition, the return mechanism section 11 shown in FIGS. 4 and 5
The purpose is also to remove the above-mentioned twist,
The above object is achieved by making the connecting fitting main body 6 and the latch head 10 rotatable.

Further, as shown in FIG. 5, the core wire 12 of the wiring material 7 is inserted into the small hole 14 of the terminal terminal 13, and its tip is crushed or bent to form a connecting shape so as not to be pulled out in the axial direction, and the terminal terminal 13 is When connecting a thick wiring material by screwing it into the screw hole 16 of the latching head 10, the connecting part will not be as large as when connecting to the latching hole 8. When doing so, since the connecting portion does not rub against the inside of the pipe, there is no frictional resistance, and thereby the wiring member 7 does not come off from the latching head 10.

The present invention has effectively achieved the intended purpose with the above-mentioned configuration.In particular, the metal core wire 1, such as piano wire, provides repulsion and tensile force, and the flexibility and slipperiness are achieved by coating with an inexpensive synthetic resin. Because it is placed on layer 2, the tensile force of the wiring material 7 is very strong, and because it is flexible and slippery, it can be passed through even curved piping passages relatively easily, and it is strongly splashed and struck by the worker. Since the coating layer 2 is made of an insulating synthetic resin, there is no danger of electric shock.Furthermore, the coating layer 2 prevents the core wire from rusting, which extends its service life and makes it easier for workers. It will not stain your hands or indoor walls.

In addition, since the connection work between the connecting fitting body 6 and the nominal wire body 3 can be easily performed, anyone can easily and quickly install, replace, or repair the connecting fitting body 6, and since the level difference between the core wire 1 and the coating layer 2 is not exposed, the above-mentioned The step does not hang over the corner of the curved piping passage.

In this way, the induction connecting fitting 21 can be easily installed and replaced, and the call line main body 3 will not rust, the room or hands will get dirty, there will be no strong splashing, and there will be no electric shock. The practical effect of the present invention is significant, as it can easily pass through passages, and even low-grade and inexpensive synthetic resin materials can be used, reducing the cost of the entire call line.

[Brief explanation of the drawing]

Fig. 1 is a front sectional view for explaining the connection method of one embodiment of the present invention, Fig. 2 is a front sectional view of main parts, Fig. 3 is a front sectional view of another embodiment, and Fig. 4 is a front sectional view of another embodiment. FIG. 5 is a front sectional view showing another embodiment. DESCRIPTION OF SYMBOLS 1...Core wire, 2...Coating layer, 3...Nominal wire body, 4...Terminal terminal, 5...Small hole, 6...Connection fitting body, 7...Wiring material, 10...Latching head , 11
...Returning mechanism section, 15...Screw hole, 17...
Recess, 21...Guidance connecting fitting, 22...Male thread protrusion, 23...Removal prevention latching part, 25...Empty chamber.

Claims (1)

[Claims for Utility Model Registration] 1. In a call line consisting of a call wire main body 3 and a guiding connecting fitting 21 attached to its tip, the call wire main body 3 has a metal core wire 1 for repulsion and tensile reinforcement.
and a synthetic resin coating layer 2 for reducing sliding frictional resistance.
A latching head 10 for latching the wiring material 7, a connecting fitting main body 6 having a screw hole 15 formed on the base side, a small hole 5 through which the core wire 1 is inserted, and a male screw protrusion screwed into the screw hole 15. 22, the core wire 1 at the tip of the call wire main body 3 from which the coating layer 2 has been peeled off by a predetermined length is inserted through the base end of the small hole 5 of the terminal terminal 4, and its protrusion is crushed or The terminal terminal 4 is bent and used as a retaining hook 23.
Connect the nominal line main body 3 to the terminal terminal 4, and further connect the male threaded protrusion 22 of the terminal terminal 4 to the connecting fitting main body 6.
A call line characterized in that the call line main body 3 and a guiding connecting fitting 21 are connected by screwing into a screw hole 15 of the call line. 2. The terminal terminal 4 has a large-diameter recess 17 formed on the proximal end side to form a small hole 5 and a stepped hole portion, and a call wire main body 3 with the coating layer 2 peeled off from the tip by a predetermined length.
The calling wire according to claim 1, wherein the tip of the coating layer 2 is formed so as to be fitted into the recess 17. 3. Utility model registration claim 1 or 2, in which the latch head 10 and the connecting fitting main body 6 are rotatably connected via the untwisting mechanism section 11 which is rotatable around the axis. Call line.