JP3232277B2 - Wire accessories - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric wire accessory for binding electric wires on an electric circuit.

[0002]

2. Description of the Related Art Regardless of a high-current facility or a low-current facility, in an electric line including an electric line of the electric line,
When an overcurrent flows through the electric wire of the electric circuit, the overcurrent causes abnormal heat generation, which may cause accidents and disasters. If contact failure occurs at the connection portion between the electric wire and the terminal or between the electric wire and the electric wire, for example, due to loosening of the screw, abnormal heat generation may occur, and accidents and disasters may occur. Therefore, it is necessary to periodically inspect the electric wires of the electric circuit and determine whether or not abnormal heating has occurred.Until now, workers have touched the wires with their hands to determine whether or not abnormal heating has occurred. However, not only skill is required but also dangerous, and improvement is strongly demanded.

[0003] Regarding the abnormal heat generation of the electric wire, the legal maximum allowable temperature is determined by the electric technical standards. For example, in the case of an insulated wire covered with a vinyl-based insulator, the legal maximum allowable temperature is set to 60 ° C., and when the temperature of the wire reaches 60 ° C., it is obliged to take measures. In the case of insulated wires covered with polyethylene insulation, the legal maximum allowable temperature is 75 ° C
When the temperature of the electric wire reaches 75 ° C., it is required to deal with it.

Further, in an electric wire path including electric wires of an electric circuit, a large number of electric wires are appropriately superimposed and each electric wire is often bound by a band-like material. Each generates heat, and its temperature is considerably higher than the part where the wires are not overlapped. For this reason, in the part where the wires are not overlapped, even if the temperature of the wire does not reach the legal maximum allowable temperature, the wire is overlapped and bound in the part where the wire reaches the legal maximum allowable temperature. Sometimes. Therefore, it is preferable to determine the abnormal heat generation of the wire at the portion where the wires are overlapped and bound.

[0005]

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to easily determine abnormal heat generation of an electric wire in an electric circuit and to determine abnormal heat generation of a wire at a portion where the electric wire is bound.

[0006]

According to the present invention, an electric wire accessory having a special structure is used for electric wires in an electric circuit. The wire accessories are injection-molded with a synthetic resin material such as nylon or vinyl chloride resin, and consist of an integrally molded body and lock head.The body is flexible,
It is in the shape of a band that can bind the electric wires of the electric circuit. The lock head is provided at one end of the main body and has a hole through which the other end of the main body can be inserted and locked. Furthermore, a thermochromic pigment that changes color due to abnormal heat generation of the electric wire is mixed into the material of the main body or applied to the outer surface of the main body.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below.

In FIG. 1, this is an electric wire accessory used for the electric wire 1 of the electric circuit, and comprises a main body 4 and a lock head 5 which are injection-molded with a material made of a synthetic resin such as nylon or vinyl chloride, and are integrally molded. The main body 4 is flexible and has a band shape long enough to bind the electric wires 1 of the electric circuit. The lock head 5 is provided at one end of the main body 4 and has a hole through which the other end of the main body 4 can be inserted and locked. Therefore, many electric wires 1
Are appropriately overlapped, the main body 4 of the accessory is wound around each wire 1, and the other end is inserted into the hole of the head 5 and locked, whereby each wire 1 can be bound. The other end of the main body 4 can be removed from the hole of the head 5 and can be removed from the electric wire 1.

Further, a thermochromic pigment is mixed in the material of the main body 4. The thermochromic pigment is a reversible or irreversible thermochromic pigment, and changes color at the legal maximum allowable temperature for abnormal heat generation of the electric wire 1. In this embodiment, an insulated electric wire covered with a vinyl-based insulator is used as the electric wire 1 of the electric circuit. In the case of an insulated wire covered with a vinyl-based insulator, its legal maximum allowable temperature is 60 ° C. Accordingly, the thermochromic pigment changes color at a temperature of approximately 60 ° C. On the other hand, in the case of an insulated wire covered with a polyethylene-based insulator, its legal maximum allowable temperature is 75 ° C. Therefore, when an insulated wire covered with a polyethylene-based insulator is used as the wire 1 of the electric circuit, the temperature indicator pigment changes color at a temperature of about 75 ° C.

Therefore, for example, an overcurrent flows through the electric wire 1 and abnormal heat generation occurs due to the overcurrent. When the heat generation temperature reaches approximately 60 ° C. or 75 ° C., the temperature indicator pigment changes color due to the abnormal heat generation, and the accessory pigment is used. The body 4 itself changes color. For example, the milky or black main body 4 changes color to transparent, whereby abnormal heat generation is displayed. Therefore, just by looking at the body 4 of the accessory,
Abnormal heat generation can be easily determined.

Similarly, if contact failure occurs at the connection portion between the electric wire and the terminal or at the connection portion between the electric wire and the electric wire due to loosening of the screw or the like, abnormal heat is generated, and the heat passes through the electric wire 1. It is transmitted to the body 4 of the accessory. Accordingly, the temperature indicator pigment changes color due to abnormal heat generation, and the accessory body 4 itself changes color. Therefore, it is possible to easily determine abnormal heat generation of the electric wire 1 simply by looking at the main body 4 of the accessory.

Further, in the portion where the wires 1 are not overlapped, even if the temperature of the wires 1 does not reach the legal maximum allowable temperature, in the portion where the wires 1 are overlapped and bound, each wire 1 generates heat. Although the temperature may reach the legal maximum allowable temperature, in the case of this accessory, abnormal heat generation of the electric wire 1 can be determined at a portion where the electric wires 1 are overlapped and bound, which is preferable.

In addition, in the case of this accessory, just by looking at the body 4 of the accessory,
The abnormal heat generation can be determined simultaneously at a time. It is not necessary to determine the abnormal heat generation for each electric wire 1, which is convenient. There is no need to attach accessories for each wire,
The work can also be greatly simplified. The number of accessories can be reduced and the cost can be reduced.

In the accessory shown in FIG. 1, it can be combined with the mount base 6 as shown in FIG. As shown in FIG. 3, the mount base 6 has a double-sided adhesive tape 7 attached to the bottom surface thereof. Therefore, when binding the electric wires 1, it is possible to pass the accessory body 4 through the slot of the mount base 6, and after the binding, press the mount base 6 against a switchboard or another device, and attach and attach it with the double-sided adhesive tape 7. The electric wire 1 can be supported by the mount base 6 and the accessory. The mount base 6 and accessories can also be mounted on the wall of the building, thereby supporting the electric wire 1.

In the embodiment shown in FIGS. 4 and 5, in the same accessory, the main body 8 and the lock head 9 are injection-molded from a synthetic resin material such as nylon or vinyl chloride resin, and are integrally molded. Head 9
Is provided at one end of the main body 8. Therefore, the main body 8
Can be inserted into the hole of the head 9 and locked, and the electric wire 1 can be tightened and bound by the main body 8. Furthermore, the screw 10 is inserted into the hole of the head 9 and screwed to a switchboard or other device, whereby the head 9 and the main body 8 can be attached and the electric wire 1 can be supported. The temperature pigment is mixed with the material of the main body 8, and the color of the temperature pigment changes due to abnormal heat generation of the electric wire 1, and the color of the main body 8 of the accessory itself changes.

In each of the embodiments, the case where the thermochromic pigment is mixed into the material of the main body is described. However, even if the thermochromic pigment is applied to the outer surface of the main body, the thermochromic pigment is discolored due to abnormal heat generation of the electric wire 1 and the accessory The body itself changes color. Therefore, abnormal heat generation of the electric wire 1 can be easily determined,
Similar functions and effects can be obtained.

[0017]

As described above, according to the present invention, the temperature indicator pigment changes color due to abnormal heat generation of the electric wire, and the accessory body itself changes color. For example, a milky or black body turns transparent, which indicates abnormal heat generation. As a result, by simply looking at the body of the accessory, not only can the abnormal heat generation of the wires be easily determined, but also the abnormal heat generation of the wires can be determined at the portion where the wires are overlapped and bound, The intended purpose can be achieved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a perspective view showing another embodiment.

FIG. 3 is a side view of the mount base of FIG. 2;

FIG. 4 is a perspective view showing another embodiment.

FIG. 5 is a side view of the accessory of FIG. 4;

[Explanation of symbols]

 1 Electric wire 4,8 Accessory body 5,9 Lock head

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-5-128920 (JP, A) JP-A-6-111186 (JP, A) JP-A-62-86899 (JP, A) 64520 (JP, U) Japanese Utility Model 53-1022 (JP, U) Japanese Utility Model 57-93028 (JP, U) Japanese Utility Model 1-93915 (JP, U) Japanese Utility Model 555-152092 (JP, U) Hikaru Hei 3-68313 (JP, U) Registered utility model 3021493 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H01B 7/32 H02G 3/26

Claims (1)

(57) [Claims] 1. A body which is injection-molded from a material made of a rigid resin such as nylon or vinyl chloride resin and is integrally molded.
(4), (8) and lock heads (5), (9), the main body (4), (8) being flexible and having a length capable of binding the electric wire (1) of the electric circuit. The lock heads (5) and (9) are provided at one end of the main bodies (4) and (8),
The other end of each of the main bodies (4) and (8) has a hole that can be inserted and locked, and a thermochromic pigment that changes color due to abnormal heat generation of the electric wire (1) has An electric wire accessory characterized by being mixed with a material or applied to the outer surface of the main body (4), (8).