JPH065307U - Glass window structure of distribution box for outdoor installation - Google Patents

Abstract

(57) [Summary] [Purpose] The glass window provided on the door of the distribution box for outdoor installation is designed to maintain waterproofness for a long period of time. [Structure] In a door 1 of a distribution box for outdoor installation, fixing metal fittings 6, 6 are attached to the upper and lower sides of a cutout window 2 by bolts 7 and nuts 9, and a metal fitting body 6 of the upper and lower fixing metal fittings.
a, 6a and the peripheral edge 3 between the upper and lower end portions 8a of the glass plate 8,
8b is clamped and fixed. A rubber 4 having a U-shaped cross section is inserted and fixed on the entire circumference of the peripheral edge 3 so that the end portions 4a and 4b thereof grasp the peripheral edge 3, and the projecting strips 5 and 5 having a triangular sectional shape are provided on the end portion 4b. The rubber 4 is molded in parallel over the entire length.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a glass box formed on a door for an instrument in a distribution box for outdoor installation (hereinafter referred to as a distribution box).

[0002]

[Prior art]

 Conventionally, as a structure for fixing a glass plate to a cutout window formed in the door of the above electricity distribution box, one groove is fitted over the cutout window using rubber having an H-shaped cross section, and the glass plate is fitted in the other groove. There was a type of glass plate that is fixed flush with the door by inserting the end of the glass, or that is directly attached to the cutout window with an adhesive, but an H-shaped rubber is used. It takes a lot of time to attach the glass plate and requires a certain amount of skill, so the workability is not good. This poor workability is the same as that of the latter adhesive, but the adhesive strength is particularly insufficient with the adhesive, and the glass plate may come off. Therefore, in order to eliminate the above-mentioned drawback, as shown in FIG. 4, a rubber 21 having a U-shaped cross section is fitted around the cutout window 20, and a fixing tool 22 cut out in the same opening as the cutout window 20 is attached. A structure in which the glass plate 23 is sandwiched and fixed between the rubber 21 and the fixing bracket 22 is adopted.

[0003]

[Problems to be solved by the device]

 The glass window structure using the above-mentioned fixing metal fittings is optimal for the purpose of simply fixing the glass plate because the work is easy, but since the glass plate is attached from the inside of the door, it is cut out. Even if rubber is attached around the window, if the pressing force of the fixing tool is insufficient or the glass plate or the door itself is distorted, the glass plate may shift or a gap may be created between it and the rubber. We cannot expect sufficient waterproof performance. In particular, elastic materials such as rubber become less elastic over a long period of use, which further reduces the reliability of waterproofing. In the distribution box for outdoor installation as in the present invention, the electrical equipment is housed in the distribution box, so the main purpose is to maintain waterproofness, and the distribution box installation conditions are bad. However, perfect waterproof performance is always required. Therefore, none of the conventional glass window structures is suitable.

[0004]

[Means for Solving the Problems]

 Therefore, the present invention further improves the glass plate fixing structure using the above-mentioned fixing metal fittings to provide a glass window structure which is simple and can maintain waterproofness for a long period of time. A strip-shaped elastic material having a U-shaped cross section is fitted to the entire periphery of the cutout window formed on the door of the distribution box for installation, and a glass plate which is one size larger than the cutout window has all the edges described above. In a glass window in which the glass plate is placed in close contact with the door and is pressed and supported to the door by a fixing tool, two or more parallel protrusions are provided on the glass plate contact surface of the strip-shaped elastic material over the entire circumference. It is characterized by being formed.

[0005]

[Action]

 When a glass plate is applied to the cutout window and fixed with a fixing bracket, the ridge is pressed most strongly against the glass plate at the contact surface between the elastic material and the glass plate, so the airtightness is improved and the glass plate or door is closed. Even if there is some distortion, the ridges can be used enough. By providing two or more ridges, a space is formed between the ridges, so even if a high pressure is applied to the outside, the pressure in the space is low. Even if water is allowed to enter the space, it does not further enter the distribution box from the space.

[0006]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 is a distribution box door, which is provided with a cutout window 2. A rubber 4 having a substantially U-shaped cross section is inserted and fixed to the peripheral edge 3 of the cutout window 2 so that the end portions 4a and 4b thereof grasp the peripheral edge 3. Further, two ridges 5 and 5 having a triangular cross section are formed in parallel on the end 4b over the entire circumference of the rubber 4. Further, at the upper and lower positions of the cutout window 2, fixing brackets 6, bolts 7, 7 for mounting 6 are fixed at appropriate intervals. The fixing metal fitting 6 has a belt-shaped metal fitting body 6a, an auxiliary plate 6b having a width corresponding to the thickness of the glass plate 8 on one side in the longitudinal direction at right angles, and auxiliary plates 6c, 6c obliquely on both sides in the lateral direction. Each of them is bent downward, and the metal fitting body 6a is provided with mounting holes 6d, 6d, ... Corresponding to the bolts 7, 7 ,. Further, cushioning sponges 6e, 6e are attached to the glass plate 8 contacting portion on the back side of the metal fitting body 6a.

In the glass window structure of the distribution box configured as described above, in order to attach the glass plate 8 to the cutout window 2, first, the fixing metal fitting 6 is attached to the lower portion of the cutout window 2 and the attachment holes 6 d, 6 d ,. Insert the bolts 7, 7 ... And loosen temporarily with the nuts 9, 9. Then, the lower end portion 8b of the glass plate 8 is inserted between the metal fitting body 6a of the lower fixing metal fitting 6 and the rubber 4 (FIG. 2), and then between the metal fitting body 6a of the upper fixing metal fitting 6 and the rubber 4. While holding the upper end 8a of the glass plate 8 in between, temporarily fix the upper fixing metal fitting 6 in the same manner as described above, and after positioning the glass plate 8 at a position where it completely covers the cutout window 2, tighten the nuts 9, 9, ... Then, the glass plate 8 is pressed and fixed to the rubber 4 side as shown in FIG. At this time, since the thickness L from the apex 5a of the rubber ridges 5 and 5 is thicker than that of the end portion 4b, the ridges 5 and 5 are pressed to the glass plate 8 side with a higher pressure so that the glass plate 8 is not displaced. Since the function of pressing firmly is achieved and the airtightness is improved, rainwater and the like can be surely prevented from entering between the glass plate and the rubber. In particular, since two ridges 5 are provided, a space 5b between the ridges 5 and 5 is formed at the boundary between the outside and the inside of the box. Therefore, even if rainwater enters the space 5b, the space 5b Since the internal pressure is lower than the external pressure, rainwater will not further invade the distribution box from there, and the two ridges 5 and 5 can maintain waterproofness for a long time as double barricades.

The fixing metal fitting may be one that presses the entire peripheral edge of the cutout window as shown in FIG. 4 of the conventional example as long as the glass plate is pressed and fixed to the rubber around the peripheral edge of the cutout window. In the case of using the rubber provided with the ridges as described above, the adhesiveness and the waterproof property are high. Therefore, the structure in which only the upper and lower sides of the glass plate are pressed and fixed by using two members as in the above embodiment is reliable. Is enough. In the present invention, the number of ridges formed at the end of the rubber is not limited to the above-mentioned embodiment, but may be three or more if the width of the end has a margin, and the shape thereof is trapezoidal or The design can be changed as appropriate without departing from the gist of the present invention, such as a waveform. Of course, it goes without saying that if the number of ridges is increased, the number of spaces that can be created is increased, and the reliability is further enhanced.

[0009]

[Effect of device]

 As described above, according to the present invention, the sealing property between the rubber plate and the glass plate is good, and even if the glass plate or the peripheral edge is distorted, the ridges can be used. Can be maintained, and high waterproofness can be maintained for a long time even if the elasticity of the elastic material is weakened. In particular, a double barricade consisting of two or more ridges creates a space between the ridges, so even if the outer ridges allow water to enter, Water cannot enter the distribution box further from a lower space. Furthermore, by imparting a high waterproof effect to the elastic material, it is possible to use the fixing metal fittings with the minimum configuration, the cost is not required, and the mounting work is further facilitated.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a glass window structure in the above embodiment.

FIG. 2 is an explanatory diagram showing a mounted state of a glass plate in the above embodiment.

FIG. 3 is an explanatory view showing a mounted state of a glass plate in the above embodiment.

FIG. 4 is an explanatory diagram showing a conventional glass plate fixing structure.

[Explanation of symbols]

1 ... Door 2 Cutout window 3 Perimeter 4 Rubber 5 Protruding metal 6 Fixing metal 6a Metal fitting main body
6b, 6c ... Auxiliary plate, 6d ... Mounting hole, 6e .. Sponge, 7 ... Bolt, 8 ... Glass plate, 9 ... Nut.

Claims (1)

[Scope of utility model registration request] 1. A strip-shaped elastic material having a U-shaped cross section is fitted to the entire periphery of a cutout window formed in a door of a distribution box for outdoor installation, and a glass plate which is slightly larger than the cutout window,
In a glass window in which all edges are arranged so as to be able to adhere to the band-shaped elastic material, and the glass plate is pressed and supported to the door by fixing metal fittings, two or more parallel protrusions are provided on the glass plate-contacting surface of the band-shaped elastic material. A glass window structure of a distribution box for outdoor installation, which is formed with a strip all around.