JPH03820Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of application of the invention] The present invention relates to a wiring outlet for electrical equipment that requires waterproofing, and particularly relates to a wiring outlet suitable for leading in a large number of electric wires. .

[Background of the idea]

JISF is used as a waterproof outlet hardware for the electric wire inlet.
8801 is often used, but it has the disadvantage that when multiple wires are drawn in at the same time, gaps are created between the wires, making it impossible to maintain waterproof function. In addition, a method as shown in FIG.
0 is fixed by wrapping a string 11 around it, and then the waterproof cloth 10 is folded back and a string 12 is further wrapped around the wire bundle 5 to fix it. Before wrapping the string 12, the electric wires of the wire bundle 5 are The gaps had to be filled with putty or the like to make them waterproof, and the work of winding the string was inefficient and took a lot of time, and the reliability of the waterproofing was affected by differences in the ability of individual workers. .

[Purpose of invention]

The purpose of this invention is to ensure reliable waterproofing regardless of the thickness and number of wires, and to
To provide a wiring outlet structure for an electric device which has a simple structure, good workability, and whose reliability does not vary depending on the ability of a worker.

[Summary of the idea]

In the present invention, an outlet pipe is provided in an electrical equipment box, a bushing is screwed onto the tip of the outlet pipe, and the outlet pipe is installed in a part of the outlet pipe closer to the electrical equipment box than the bushing installation position. A flexible seal tube is provided with an inner diameter that fits into the outer diameter of the bushing and an outer diameter that is approximately equal to the outer diameter of the bushing. The seal tube is characterized in that the entire circumference of the outer circumferential portion corresponding to the seal tube is tightened with a tightening band.

[Example of idea]

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. FIG. 1 shows a longitudinal cross-sectional view of the present invention,
Figure 2 shows a partial cross-section of a train when the system is applied to underfloor equipment of a train.

In Fig. 1, an outlet pipe 2 made of thin steel conduit is welded to the side of an equipment box 1.
A bushing 3 is screwed into the other end. An elastic seal tube 4 made of, for example, soft rubber is placed over the outer periphery of the outlet pipe 2 before the bushing 3 is screwed in, and the outer diameter of the seal tube 4 is selected to be approximately equal to the outer diameter of the bushing 3. I'll keep it.

A wire bundle 5 consisting of a plurality of wires is inserted into the outlet of such a device, a flexible protective tube 6 made of soft rubber or the like is covered from the outside, and a suitable tightening band 7 is used to secure the wire bundle 5. Tighten. Therefore, there is no gap between the protective tube 6, the seal tube 4, and the outlet pipe 2, and the waterproofness of the outlet part of the device can be ensured.

By simultaneously tightening the tightening band 7, the protective tube 6 and the sealing tube 4 are bent in the diametrical direction and their outer peripheries are reduced and become smaller than the outer diameter of the bushing 3. Therefore, even if the protective tube 6 is stretched for some reason, it will not fall off from the outlet pipe 2.

FIG. 2 shows a state in which the equipment box 1 is installed under the floor of the car body 8 of a train, and wires are wired to the equipment box 1 using conduits 9. The bushing 3 described in FIG.
If the seal tube 4 is installed in exactly the same manner as shown in FIG. The gaps in between can be completely closed to maintain a waterproof structure.

At the same time, the protective tube 6 eliminates the exposure of the electric wire,
It is also effective in protecting electric wires from damage from flying stones.

[Effect of idea]

According to the present invention, it is possible to waterproof the outlet regardless of the gap between the inner diameter of the outlet of the equipment box and the bundle of wires, thereby making it possible to waterproof the outlet regardless of the thickness of the wire drawn into the equipment box. Since the inner diameter of the outlet can be determined in advance regardless of the number of outlets, it is possible to standardize the design of the outlet and reduce the number of types. Furthermore, since waterproofing is established simply by tightening both ends of the protective tube with tightening bands, reliability is reduced due to differences in the ability of workers compared to the conventional methods of filling with putty or wrapping waterproof cloth with string. This has the effect of preventing this and improving work efficiency.

[Brief explanation of drawings]

Fig. 1 is a longitudinal cross-sectional view of an embodiment of the present invention, Fig. 2 is a cross-sectional view of a train when the present invention is applied to underfloor equipment, and Fig. 3 is a longitudinal cross-sectional view showing an example of a conventional structure. It is. 1...Equipment box, 2...Outlet pipe, 3...Butting, 4...Seal tube, 5...Wire bundle, 6...
...Protection tube, 7...Tightening band, 8...Vehicle body, 9...Conduit tube, 10...Waterproof cloth, 11, 12
...string.

Claims (1)

[Scope of utility model registration request] An outlet pipe is provided in the electrical equipment box, a bushing is screwed and installed at the tip of the outlet pipe, and a part of the outlet pipe is closer to the electrical equipment box than the bushing installation position,
A flexible seal tube is provided with an inner diameter that fits into the outlet pipe and an outer diameter that is approximately equal to the outer diameter of the bushing, and a protective tube is placed over the outer periphery of the bushing and the seal tube, and
A wiring outlet structure for an electrical device, characterized in that an outer circumferential portion of the protective tube corresponding to the sealing tube is tightened all around with a tightening band.