JPH047622Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a protective device for protecting the outer periphery of an insulated cable in order to prevent the sheath from being damaged by external force.

[Conventional technology]

Conventionally, when wiring an insulated cable, in order to protect the parts of the sheath that are susceptible to external forces, methods such as partially wrapping vinyl tape around that part or covering it with a protective sleeve were generally adopted. .

[Problem that the invention attempts to solve]

However, with all of these methods, not only is the installation work troublesome, but the work of removing the vinyl tape wrapped around the insulation sheathing tape or the protective sleeve covered with the wiring is even more complicated and troublesome than the installation work. Ta.

An object of the present invention is to provide a protective device that is very easy to attach to and remove from an insulated cable.

[Means for solving problems]

The protective equipment according to the present invention is made of a relatively hard circular wire rod made of synthetic resin, and is formed into a flexible spiral shape as a whole, and the spiral winding portions are continuous at regular intervals at a spiral pitch P. There is. The spiral winding part has a spring force that always restores and maintains the spiral pitch P in the direction of contraction, and has a spring force that contracts the spiral pitch P below the spiral pitch P when the spiral pitch P is forcibly expanded in the direction of extension. It has the characteristic of remaining in an elongated state due to plastic deformation until force is applied. Further, the inner peripheral diameter of the spiral winding portion is set to a size that allows the spiral pitch P to be expanded and sequentially wound around the midway outer periphery of the insulated cable to be coated.

[Effect]

To install such a protector midway through an insulated cable, attach one end or midway of the helix.
After the helical pitch is expanded against the spring force and forcefully fitted onto the outer periphery of the insulated cable, the unfitted portion is repeatedly turned around the outer periphery of the cable, thereby making it possible to sequentially wind the cable along the spiral.
In addition, to remove it, one end is forcibly removed and then the coil is repeatedly turned in the opposite direction to the direction in which it was wound, so that the coiled state can be sequentially released along the spiral. When winding the cable around the outer circumference of the insulation-coated cable, and when removing it from the cable, if the helical pitch P is forcibly stretched until it expands beyond the outer diameter of the insulation-coated cable, the stretched state will be maintained due to plastic deformation. Therefore, installation and removal can be easily performed from the point where the spiral pitch is widened.

〔Example〕

Examples of the present invention will be described below.

In FIG. 1, a protective device 1 according to the present invention is formed into a series of spiral shapes using a relatively hard circular wire rod 2 made of synthetic resin, and has a spring force similar to a helical spring in response to contraction pressure. The helical pitch P (the interval between each spiral winding part 3) at the time of completion of the molding is maintained. The helical pitch P can be changed. However, if a shrinkage force is applied that causes the helical pitch P to disappear from its plastically deformed state, it will return to its state when the molding is completed. This protector 1 is molded to a sufficient length so that it can be cut to an appropriate length and used, and the inner diameter of the spiral is the same size as the outer diameter of the insulated cable 4 to be protected. It is sized accordingly. That is, the protective equipment 1 is available in a plurality of sizes depending on the thickness of the insulated cable 4.

To attach such a protector 1 to an insulated cable 4, as shown in FIG. As shown in FIG. 2, the insulation coated cable 4 is repeatedly turned in the spiral winding direction on the outer periphery of the insulation coated cable 4, and each spiral winding part 3 is sequentially wound along the spiral from one end to the other end.
Wrap it around the outer circumferential surface of the At this time, since the wire rod 1 is circular and has a spiral shape as a whole, the spiral winding part 3 that is actually wound around the insulated cable 4 slides smoothly on the outer peripheral surface of the insulated cable 4 and automatically wrapped around. and,
Wrap it to the desired length and then cut it. In addition,
It may be cut to an arbitrary length before winding.

Alternatively, as shown in FIG. 3, after cutting the cable to an arbitrary length in advance and forcibly fitting the intermediate spiral winding part 3 to the outer circumferential surface of the insulated cable 4 by expanding the spiral pitch P, The unfitted portions on both sides are each turned in the spiral winding direction, and each spiral winding part 3 is wound in sequence from the middle to both ends.

When the insulated cable 4 is bent as shown in FIG. 4, the protector 1 wound around the insulated cable 4 in this manner is bent while expanding the spiral pitch P, and the insulated cable 4 is bent. ,
Even if the wiring is bent along an obstacle 5, the cable is bent and interposed between the bent part of the insulated cable 4 and the obstacle 5, and protects the insulated cable 4 from the obstacle 5 and prevents electrical Also insulate.

To remove the protective equipment 1 from the insulated cable 4,
After the spirally wound portion 3 at one end is forcibly extracted from the insulated cable 4, the coiled state can be sequentially released along the spiral by repeatedly turning it in the opposite direction to the direction in which it was wound.

[Effect of idea]

As described above, the protective device of the present invention is designed to forcibly fit one end or the middle of a spiral synthetic resin wire material to the outer periphery of an insulated cable by expanding the spiral pitch against the spring force, and then unfitting it. By repeatedly circling the section around the cable's circumference, it can be attached to an insulated cable by successive helical wraps, and to remove it, one end must be forced off and the direction of the winding must be By repeatedly turning in the opposite direction, the wrapped state can be sequentially released along the spiral, making installation and removal operations very easy. Moreover, when winding the insulation-covered cable around the outer circumference of the insulation-covered cable, and when removing it from the cable, if the helical pitch P is forcibly stretched until it expands beyond the outer diameter of the insulation-covered cable, the stretched state will be maintained due to plastic deformation. Because
Attach from the point where the spiral pitch expands,
Easy to remove. In addition, since it is simply a synthetic resin wire molded into a spiral shape,
It is easy to manufacture and can be provided at low cost. Furthermore, since it is shaped like a helical spring, it can be bent when the insulated cable is bent.

[Brief explanation of drawings]

1 to 3 are perspective views showing a state in which a protective device according to an example of the present invention is attached to an insulated cable, and FIG. 4 is a side view showing an example of wiring of the insulated cable to which the protector is attached. 1... Protective equipment, 2... Wire rod, 3... Spiral winding portion, 4... Insulated coated cable.

Claims (1)

[Scope of utility model registration request] A relatively hard circular wire made of synthetic resin, molded into a bendable spiral as a whole, with the spiral windings continuous at intervals of a certain spiral pitch P, and the spiral windings are: In the direction of contraction, it has a spring force that always maintains the spiral pitch P in its original state, and in the direction of extension, when the spiral pitch P is forcibly expanded, it stretches due to plastic deformation until an external force is applied to contract it below the spiral pitch P. It has the characteristic that the condition remains, and the inner circumferential diameter of the helical winding part is large enough to allow the helical pitch P to be expanded and wound sequentially around the midway outer circumference of the insulated cable to be coated. Protective equipment for insulated cables featuring: