JPH0658523U - Branch unit for cabling lighting - Google Patents

Abstract

(57) [Summary] [Purpose] The branch cable for cavern lighting is to be manually loaded into the cavern from a manhole and standardized so that it can be applied to any cavern. [Structure] The branch cable for cavern lighting is cut into strip lengths that can be manually carried into the cavern from the manhole, and male and female plug connectors are attached to both ends in a watertight manner.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention relates to a wiring branch unit used to supply power to a lighting fixture in a cave.

[0002]

[Prior art]

 Conventionally, according to the design drawing created according to the length of the cave and the number of lighting fixtures, the cable with the required number of branch lines attached to the trunk cable of the required length was used as a cable for cabling lighting in advance at the factory. It had been.

[0003]

[Problems to be solved by the device]

 However, with the conventional technology, field work for making a blueprint, for example, actual measurement of the cavern length at the site, examination of the optimal branch interval and number of branches for the cavern, and determination of the trunk cable length are quite troublesome tasks. Of the main cable, the problem that it is almost impossible to change the design after the completion of the cable, and the failure of the main cable, the branch part, and the lighting equipment connector part after completion, the separation of the part There was a problem that connection etc. could not be performed easily. This invention was made to solve these problems.

[0004]

[Means for solving problems]

 The trunk cable with branch lines is divided into lengths that can be easily carried into the cave from the manhole by human power, and male or female plug-in type connectors are attached to both ends in a watertight manner.

[0005]

[Action]

 Depending on the length of the cavern, the required number of trunk cables that are pulled into the cavern can be connected to each other with male or female plug-in connectors to form a cable for cavern lighting. is there.

[0006]

【Example】

 A drawing showing an example of an embodiment of the present invention will be described. (2) is a trunk cable, an appropriate number of branch lines (1) are connected at appropriate intervals, and the branch part is an insulator such as vinyl or polyethylene. It is covered with and is molded. A male plug connector (3) is attached to one end of the main cable (2) and a female plug-type connector (3) is attached to the other end in a watertight manner. Normally, the plug-in connector (3) is molded integrally with the sheath of the main cable (2). In addition, the trunk cable (2) is constructed so that several workers can easily carry it into the cave from the manhole.

[0007] In carrying out the implementation, depending on the length of the tunnel and the number of luminaires, pull in the required number of trunk cables (2) into the tunnel, connect the plug-in connectors (3) to each other, and connect the trunk cable ( A plug is attached to the plug-in connector (3) at the end that is not connected to 2).

A mold connector to be combined with a lighting fixture is usually attached to the tip of the branch line (1).

[0007]

【effect】

 Since this device is constructed as described above, it has the following effects. (1) No need for conventional on-site surveys, (2) design changes can be freely performed (3) defective parts can be easily removed after completion, (4) easy loading even in long caverns, ( 5) Mass production is possible and cost can be reduced. It has the effect of the above and has a high industrial utility value.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an example of implementation of this invention.

[Explanation of symbols]

 1 Branch wire 2 Main cable 3 Male, female plug connector on the other end

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Shinobu Ichijo 1-6, Uchisaiwaicho, Chiyoda-ku, Tokyo Inside Nippon Telegraph and Telephone Corporation (72) Tadayoshi Kaneko 1-1-6, Uchisaiwaicho, Chiyoda-ku, Tokyo Nippon Telegraph and Telephone Corporation (72) Inventor Masaki Iwasawa 1-6, Uchisaiwaicho, Chiyoda-ku, Tokyo Nihon Telegraph and Telephone Corporation (72) Inventor Hiroshi Tada 1-1-6, Uchisaiwaicho, Chiyoda-ku, Tokyo No. Nippon Telegraph and Telephone Corp. (72) Ken Noguchi Ken 1-6, Uchisaiwaicho, Chiyoda-ku, Tokyo Nihon Telegraph and Telephone Corp. (72) Hiroyuki Tachibana 1-6, Uchisaiwaicho, Chiyoda-ku, Tokyo No. Nihon Telegraph and Telephone Corporation (72) Inventor Shigeru Nozaki 1-1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Nihon Telegraph and Telephone Corporation

Claims (1)

[Scope of utility model registration request] 1. A branch unit for cavern lighting, wherein a male or female plug-in connector (3) is watertightly attached to both ends of a trunk cable (2) having a branch wire (1).