JP7247737B2 - Waterproof structure of the drip-proof box - Google Patents

Description

The present invention relates to a waterproof structure for a drip-proof box.

Conventionally, when wiring inside a drip-proof box, there is a case where a connection is made via a cable connector that connects the inside and the outside. However, since wiring includes power supply lines, data lines, and other wiring lines, it is necessary to secure a large space for these wiring lines to separately form connectors. Also, when the specifications are changed, it is necessary to redesign the connector. For this reason, there is a problem that the degree of freedom in designing the drip-proof box is hindered, and the cost of the product is high.

Japanese Patent No. 4021671 JP 2005-341659 A JP-A-9-327111

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object thereof is to provide a waterproof structure for a drip-proof box that has a drip-proof effect and allows wiring that connects the inside and the outside to be connected without a connector. to provide.

The waterproof structure of the drip-proof box described in claim 1 includes a drip-proof box 10, a sheet metal member 18 connected to the drip-proof box via a pad 20, and a hole 18f provided in the sheet metal member. A distribution cable 12 having a tubular covering resin 12a inserted through the drip box, a rubber member 16 provided around the wiring cable, and a tubular covering resin 13a disposed in the wiring cable and a conductive portion. A plurality of wiring portions 13 each having 13b are provided, and the gaps between the wiring portions and between the coating resins are made as small as possible.

According to the waterproof structure of the drip-proof box described above, it is possible to provide a waterproof structure of the drip-proof box that allows the wiring that connects the inside and the outside to be connected without a connector while providing the drip-proof effect.

1 is a partially transparent perspective view showing a schematic configuration of a waterproof structure of a drip-proof box according to the first embodiment; FIG. FIG. 2 is a side view showing a schematic configuration of the waterproof structure of the drip-proof box according to the first embodiment; 1 is an exploded view showing a schematic configuration of a waterproof structure of a drip-proof box according to a first embodiment; FIG. Cross-sectional view showing a schematic configuration of a distribution cable Diagram showing schematic configuration of distribution cable FIG. 10 is a diagram showing a schematic configuration of a sheet metal member according to a second embodiment, and is a perspective view showing a state in which a joining member is separated; FIG. 10 is a diagram showing a schematic configuration of a sheet metal member according to a second embodiment, and is a perspective view showing a state in which joining members are combined;

A waterproof structure of a drip-proof box according to an embodiment of the present invention will be described below with reference to the drawings. In the following description, the same reference numerals or names are given to the same elements as those described above, and the description thereof will be omitted.

(First embodiment)
A waterproof structure 1 for a drip-proof box according to the first embodiment will be described with reference to FIG. As shown in FIGS. 1 to 3, the waterproof structure 1 of the drip-proof box of this embodiment includes a drip-proof box 10, a wiring cable 12, and a sheet metal member 18. As shown in FIGS.

The drip-proof box 10 is a sealed box that accommodates electrical components (not shown) inside and is configured to prevent water from entering. Power is supplied to the inside of the drip-proof box 10 from the outside through a wiring cable 12 . The drip-proof box 10 is, for example, a fuse box, a relay box, or the like.

The waterproof structure 1 of the drip-proof box is realized as follows.
The drip-proof box 10 is configured by, for example, a square prism-shaped box, and is provided with a cable hole 10a penetrating through the bottom of the box in the figure. The cable hole 10 a is a through hole through which the distribution cable 12 is inserted inside and outside the drip-proof box 10 . The drip-proof box 10 is watertight except for the cable hole 10a.

A sheet metal member 18 and a pad 20 are fixed to the drip-proof box 10 by, for example, bolts (not shown), through which the distribution cable 12 is inserted to maintain watertightness. Inside the sheet metal member 18 and around the wiring cable 12, a rubber member 16 is provided without a gap in the sheet metal member 18. - 特許庁

The sheet metal member 18 is constructed by combining two members 18a and 18b. The mating members 18a and 18b are mirror images of each other, and by making them face each other and connecting them, a sheet metal member 18 having an inner hollow cylindrical portion 18d in the center is formed. .

A flat plate portion 18c is provided on the portion of the sheet metal member 18 facing the drip-proof box 10, and the flat plate portion 18c is fixed to the drip-proof box 10 via a pad 20 with a bolt (not shown). The sheet metal member 18 is connected to the drip-proof box 10 so that the cylindrical portion 18d is aligned with the cable hole 10a. The distribution cable 12 whose periphery is covered with the rubber member 16 is inserted into the cylindrical portion 18d.

The rubber member 16 is, for example, a flat rubber sheet made of nitrile rubber, which is a copolymer of acrylonitrile and 1,3-butadiene. The rubber member 16 is fixed by winding it around the wiring cable 12 while tightly binding it with a fixing belt 16a. In this case, the wiring cable 12 and the rubber member 16 are fixed so as not to form a gap. The drip-proof box 10, the pad 20, and the sheet metal member 18 are fixed with, for example, bolts (not shown). It should be noted that it may be fixed by an adhesive or the like instead of bolt fixing.

The distribution cable 12 is composed of, for example, a plurality of wiring portions 13, as shown in FIG. The wiring portion 13 has a structure in which the periphery of the conductive portion 13b is covered with a tubular coating resin 13a. A wiring cable 12 is configured by bundling a plurality of wiring portions 13 and covering the bundle with a tubular covering resin 12a. The coating resins 12a and 13a are insulating resins, and are made of materials that are impermeable to water and elastically deformable. Although FIG. 4 shows an example in which the wiring cable 12 is composed of three wiring portions 13, there is no intention of limiting to this. The wiring cable 12 may be configured with more wiring portions 13 than three.

In this manner, the wiring cable 12 covered with the rubber member 16 is inserted into the drip-proof box 10 through the hole 18 f of the sheet metal member 18 and the hole 20 a of the pad 20 . The sheet metal member 18 is fixed with the fixing belt 17 by combining the joining members 18a and 18b in a palm-to-palm state, thereby fixing the wiring cable 12 while pressing the rubber member 16 therein. As a result, the distribution cable 12 and the rubber member 16 are brought into tight contact with each other.

In the distribution cable 12, between the plurality of wiring portions 13 and between the wiring portions 13 and the coating resin 12a, a gap G is shown in FIG. , and the pressing and fixing of the sheet metal member 18 by the fixing belt 17 causes the covering resin 12a and the covering resin 13a to be elastically deformed and flexed to crush the gap G, so that the gap G is actually made as small as possible. .

Further, as shown in FIG. 5, by twisting and twisting the plurality of wiring portions 13, the coating resin 13a is pressed, and this also reduces the gap G as much as possible.

By minimizing the gap G between the wiring cables 12 in this manner, the transmission path of moisture is minimized, and intrusion of moisture into the drip-proof box 10 can be suppressed. Further, as the height H of the sheet metal member 18 increases, the length of the moisture transmission path increases, so that the penetration of moisture into the drip-proof box 10 can be suppressed. As described above, the waterproof structure 1 of the drip-proof box is achieved.

As described above, according to the waterproof structure 1 of the drip-proof box according to the first embodiment, the following effects are obtained.
The circumference of the distribution cable 12 is covered with the rubber member 16 and is further fixed by the fixing belt 16a. The wiring part 13 is pressed and bent, thereby minimizing the gap G. - 特許庁Further, since the sheet metal member 18 is also tightly bound and fixed by the fixing belt 17, the gap between the sheet metal member 18 and the distribution cable 12 is made as small as possible by compressing the rubber member 16 inside. Thereby, the watertightness inside the distribution cable 12 is maintained. A pad 20 is interposed and fixed between the sheet metal member 18 and the drip-proof box 10 . A pad 20 is provided between the drip-proof box 10 and the sheet metal member 18 to ensure watertightness.

In this manner, the rubber member 16 and the sheet metal member 18 are watertightly formed by the tight binding of the fixing belt 17, and the rubber member 16 and the wiring cable 12 are tightly bound by the fixing belt 16a to make the wiring cable 12 watertight. It is configured to minimize the occurrence of a gap G between the wiring part 13 in the wiring part 12 and the wiring part 13 . Furthermore, the height H of the sheet metal member 18 is set large.

With the above configuration, the waterproof structure 1 of the drip-proof box is realized. According to the waterproof structure 1 of the drip-proof box according to the first embodiment, it is possible to suppress the infiltration of moisture into the drip-proof box 10 .

Further, the wiring cables 12 constituting the wiring to be inserted into the cylindrical portion 18d of the sheet metal member 18 can be arranged without separating power lines, signal lines, and other wiring. Therefore, since it is not necessary to separate the distribution cables 12 and connect them inside and outside the drip-proof box 10, a large installation place for installing the connectors is not required, and the degree of freedom in design is ensured, and the cost of the drip-proof box 10 is reduced. can contribute to

(Second embodiment)
A second embodiment will be described with reference to FIGS. 6 and 7. FIG. In the second embodiment, instead of the sheet metal member 18, a sheet metal member 19 shown in FIGS. 6 and 7 is used. The sheet metal member 19 is configured by combining mating members 19a and 19b. Each of the mating members 19a and 19b is provided with a concave portion corresponding to half of the cylindrical shape of the internal cavity on one surface of the quadrangular prism shape. A hole (cylindrical portion) 19c, which is a cylindrical internal space formed by this concave portion, is formed when the mating members 19a and 19b are assembled so as to face each other.

The sheet metal member 19 is configured by combining and fixing the mating members 19a and 19b, which are in a mirror image relationship, facing each other so as to put their palms together. Other configurations are the same as those of the waterproof structure 1 for the drip-proof box according to the first embodiment, and the same effects as those of the waterproof structure 1 for the drip-proof box according to the first embodiment are obtained.

Although the present disclosure has been described with reference to examples, it is understood that the present disclosure is not limited to such examples or structures. The present disclosure also includes various modifications and modifications within the equivalent range. In addition, various combinations and configurations, as well as other combinations and configurations, including single elements, more, or less, are within the scope and spirit of this disclosure.

DESCRIPTION OF SYMBOLS 10... Drip-proof box 12... Wiring cable 12a, 13a... Coating resin 13... Wiring part 13b... Conductive part 16... Rubber member 17... Fixing belt 18, 19... Sheet metal member 18d, 19c... Cylinder shape part, 18f, 19c... hole part, 20... pad

Claims (5)

a drip-proof box (10);
a sheet metal member (18) having a cylindrical portion (18d) connected to the drip-proof box via a pad (20);
a wiring cable (12) having a tubular covering resin (12a) inserted into the drip-proof box through a hole (18f) provided in a sheet metal member;
a rubber member (16) provided around the wiring cable;
A plurality of wiring portions (13) arranged in the wiring cable and composed of a tubular coating resin (13a) and a conductive portion (13b),
A waterproof structure of the drip-proof box, wherein the gaps between the wiring portions and between the coating resins are made as small as possible. 2. The waterproof structure of the drip-proof box according to claim 1, wherein the rubber member is compressed by binding the sheet metal member with a fixing belt (17) to minimize the gap between the wiring cable and the sheet metal member. . 3. The waterproof structure of a drip-proof box according to claim 1, wherein the wiring cable is compressed by binding the rubber member 16 with a fixing belt (16a) to minimize the gap between the wiring portions. 4. The waterproof structure of the drip-proof box according to claim 1, wherein the plurality of wiring portions are twisted so that gaps between the wiring portions are minimized. 5. The waterproof structure for a drip-proof box according to claim 1, wherein the rubber member is made of rubber.

Images