JPH07123535A - Waterproof structure for distribution board or control board - Google Patents

Abstract

PURPOSE:To eliminate the need of sealing material, e.g. a silicon based sealant, by forming a Z-shaped level difference on a longitudinal frame constituting a box body, applying a packing in the space at the level difference and tightening by means of a bolt thereby achieving waterproof by simply tightening the connection bolts between the boards. CONSTITUTION:A sponge-like packing 11 is adhered to the side face at the level difference part 10a of a longitudinal frame 10 for back and forth jointing face formed by bending a plate metal into Z-shape. Consequently, the packing 11 is compressed when bolts 3, 5 for connecting the boards are tightened. The elastic packing fills the gap, if any, occurring after connection of the boards thus preventing intrusion of water from the side part of the box body 1 of distribution board. This structure eliminates the sealing material, e.g. a silicon based sealant.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproof structure for connecting box bodies of a switchboard or a control panel.

[0002]

2. Description of the Related Art FIGS. 12 and 13 are a perspective view and a sectional view taken along line AA of a box body of a switchboard that has been conventionally used. In the figure, 1 is two box bodies connected to each other, 2 is a frame in the height direction (hereinafter referred to as vertical frame) that constitutes a part of the box body 1, and the boxes are provided at the front, rear, left and right corners of the box 1. It is placed vertically on the body. 3 is a bolt for connecting the adjacent box bodies 1 to each other in the row board structure at the vertical frame portion, 4 is a side plate covering the most lateral side in the row board structure, and 5 is a side plate 4 fastened to the side portion of the box body 1. Bolts, 6 is a door or panel attached to the front surface or the rear surface of the box body 1, and 7 and 8 are sealing members such as silicone sealants for filling the gap between the connections.

[0003]

Since the connection of the box body of the conventional switchboard is constructed as described above, as shown in FIG. 14 seen from the front of the box body 1, the box body is caused by the cause of thermal expansion or the like. 1
Is gradually deformed and the gap 9 of the joint is enlarged. At this time, since the seal member as described above is not elastically deformed, water may enter the board through the enlarged gap 9. For this reason, it is necessary to fill the enlarged gap 9 between the panels with the seal member 7 or 8, and in order to keep the appearance of the seal member 7 or 8 incidentally, the protruding portion of the seal member 7 or 8 such as a silicone-based sealant should be clean. There were problems such as the need to finish.

The present invention has been made in order to solve the above-mentioned problems, and can be waterproofed only by tightening the connecting bolts 3 or 5 between the panels, and a sealing member such as a silicone type sealant. The purpose is to obtain a waterproof structure that can eliminate 7 or 8.

[0005]

In the waterproof structure according to the present invention, a Z-shaped step portion is formed on a vertical frame which constitutes the box body 1, and a packing is attached in the space of the step portion by a bolt. It was decided to conclude.

[0006]

In the waterproof structure according to the present invention, the packing in the stepped portion of the vertical frame for connecting front and rear connecting surfaces is pressed by the bolts for connecting the boards to be elastically compressed, and the gap 9 is generated after connecting the boards. However, the elasticity of the packing follows the gap 9 to prevent water from entering.

[0007]

EXAMPLES Example 1. An embodiment of the present invention will be described below with reference to the drawings. The external perspective view of the switchboard is the same as in FIG. 1 is a perspective view showing a frame part of the box body with packings attached to the side parts, FIG. 2 is a plan sectional view corresponding to FIG. 13, and FIG. 3 is a plan sectional view taken along the line BB of FIG. 4 is a perspective view of only the packing, and FIG. 5 is a perspective view of the vertical frame. It should be noted that in the figure, reference numerals 1 and 3 to 6 are the same as those in the above-mentioned conventional example, and therefore the description thereof is omitted. In the figure, 10 is a step 10a formed by bending a sheet metal into a Z shape.
A front and rear connecting surface vertical frame 11 is, for example, a sponge-like packing made of neoprene material, and an adhesive material is attached to one surface thereof and is adhered to the side surface of the step portion of the frame 10. Reference numeral 3 is a bolt that connects the stepped portion 10a and the adjacent narrowed portion 10b. In the figure, the bar-shaped packing 11
Is attached to the front-rear connecting surface vertical frame 10 of the box 1 in a form extending in the up-down direction, and the other surface of the packing 11 is abutted and compressed on the frame 10 of the other box to be joined. Exerts a sealing effect.

Next, the operation of the above waterproof structure will be described. In FIG. 2, the packing 11 in the stepped portion of the stepped front and rear connecting surface vertical frame 10 corresponding to the vertical frame 2 of the conventional example is pressed by the bolts 3 and 5 of the board-to-board connection, and the packing 11 is compressed. Even if the gap 9 is generated after the inter-board connection, the elasticity of the packing 11 follows the gap 9 to prevent water from entering from the side portion of the switchboard box body. Note that, as shown in FIG. 6, since the roof member 12 is separately installed on the upper part, intrusion of water from the upper part is prevented. Further, although only the waterproof function has been described in the above-mentioned example, the same dustproof effect can be exerted also on the matter that enters through the gap, for example, dust or dust. Also,
By using a sponge-like elastic body for the packing, even if the frame is deformed to some extent, it easily follows up with the deformation, thereby exhibiting a sealing effect.

Example 2. Although the packing 11 is attached to only one side of the stepped front-rear height direction frame 10, that is, to one box side in the above embodiment, an adhesive may be applied to both sides of the packing 11. .

Embodiment 3. Further, as shown in FIG. 7, packings 11 may be provided so as to face each other at the stepped portions of the vertical frames 10 of both box bodies 1 adjacent to each other, and the packings 11 may be abutted against each other.

Embodiment 4. Further, the cross-sectional shape of the packing 11 is not limited to the rectangular shape shown in FIG. 4, and may be one in which one side is arcuate as shown in FIG.

Embodiment 5. Alternatively, both sides may be arcuate as shown in FIG.

Embodiment 6. Further, as shown in FIG. 10, a stepped portion of the stepped front and rear vertical frame 10 may be formed toward the outer side of the box body 1, and the packing 11 may be mounted in the stepped portion.

[0014]

As described above, according to the present invention, the vertical frame is formed of sheet metal in a Z-shaped cross section, and the elastic packing is mounted in the step space formed when the frames are butted against each other. Since the narrowed portions adjacent to the stepped portions are bolted and fixed to each other by the bolts to perform the sealing, the following effects are obtained. (1) Compared to the conventional caulking method using a sealant, (a) cracks due to the deformation of the box do not occur, so the sealing effect can be maintained for a long period of time. (b) Compared to the caulking method, the work is easier because the packing is simply inserted when the boxes are aligned. At this time, if packing is attached to one side, workability is further improved. (2) Further, since the sheet metal is bent into a Z shape, (a) a lightweight and strong frame can be obtained. That is, the strength of the frame itself is increased, and when the frames are butt-tightened to each other, the bending strength is increased and the deformation is less likely to occur, so that the packing is effectively compressed. (b) Further, since it is Z-shaped and commonly used as the screw space for mounting the device mounting member, the packing mounting portion can be easily processed. (c) Further, as shown in FIG. 11, there is no interference between the screws 14 for mounting the device mounting member 13, and the assembling work is facilitated.

[Brief description of drawings]

FIG. 1 is a perspective view showing a frame structure of a switchboard according to an embodiment of the present invention.

FIG. 2 is a sectional plan view according to an embodiment of the present invention.

FIG. 3 is a cross-sectional plan view taken along the line BB of FIG.

FIG. 4 is a perspective view showing a packing.

FIG. 5 is a perspective view showing a vertical frame.

FIG. 6 is a perspective view showing a switchboard with a roof.

FIG. 7 is a plan sectional view showing a packing arrangement according to another embodiment of the present invention.

FIG. 8 is a perspective view showing an outer shape of a packing according to another embodiment of the present invention.

FIG. 9 is a sectional view showing a packing according to another embodiment of the present invention.

FIG. 10 is a plan sectional view of a switchboard according to another embodiment of the present invention.

FIG. 11 is a sectional view showing an example of a combined state in the present invention.

FIG. 12 is an external perspective view of a distribution board that has been conventionally used.

FIG. 13 is a plan sectional view of a conventional switchboard (AA in FIG. 12).
Cross section).

FIG. 14 is a front view schematically showing a deformed state of a frame of a conventional switchboard.

[Explanation of symbols]

 1 Box 3, 5 Bolts 4 Side plate 10 Front and rear connection surface with step Vertical frame 11 Packing

Claims (6)

[Claims] 1. In a panel-to-board connecting device when a plurality of switchboards or control boards are used as a row board, a Z-shaped step is provided in a frame in a front-rear height direction of each box body, and a height direction of both box bodies is provided. A waterproof structure for a switchboard or control panel, in which a packing is inserted into a space formed by abutting Z-shaped steps of a frame, and the narrow abutting portions adjacent to the steps are connected by bolts. 2. A Z-shaped step is provided on the frame in the front-rear height direction of the box body of the switchboard, a packing is inserted between the step and the side plate, and the adjacent narrowed portions are joined by bolts. A waterproof structure for the switchboard or control panel. 3. The waterproof structure for a switchboard or a control panel according to claim 1, wherein an adhesive is applied to the mounting surface of the packing. 4. The waterproof structure is formed by arranging packings in a vertical direction on both front and rear sides of a box body to be joined and providing a roof on an upper part of the box body to form a waterproof structure. Waterproof structure of switchboard or control panel. 5. The waterproof structure for a switchboard or a control panel according to claim 1, wherein one side or both sides of the packing has an arc shape. 6. The waterproof structure for a switchboard or control panel according to claim 1, wherein a sponge-like elastic body is used for the packing.