JP3109951U - Switchboard front and back panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the strength of an entire switchboard and improve the efficiency of mounting work to the switchboard body by adopting a folding structure and fastening by bolts and nuts to the switchboard body on the front and back plates.
SOLUTION: A front back plate 30 for attaching a door to the front or back of a cabinet of a switchboard, which is composed of a rectangular frame, and each of upper, lower, left and right sides 31, 32, 33, 34 of the frame is a cross-sectional shape. A steel plate having a letter-shaped thickness of 2.3 t to 3.2 t is joined by welding at the end of each side so that the U-shaped openings are opposed to each other, and the surface on one side of the frame is bolted A plurality of bolt / nut holes 35 for fixing to the switchboard main body 10 are drilled with nuts, and a door mounting portion 36 is extended perpendicularly from the inner peripheral edge 37 of the surface on the other side of the frame to the outer peripheral direction. .
[Selection] Figure 1

Description

  The present invention relates to a door mounting structure for a switchboard.

A door mounting plate for mounting the door is fixed to the front surface and the back surface of the casing of the switchboard. This door mounting plate is generally called a “front / rear plate”, and is usually a rectangular frame, and members on each of the four sides, top, bottom, left, and right, are joined by welding and attached to the cabinet of the switchboard with studs and nuts. .
5-8 is explanatory drawing which shows the structure of such a conventional front-back board. 5 is a perspective view of a conventional front and rear plate, FIG. 6 is a perspective view of a state before welding and joining the respective members on the four sides of the front and rear plate of FIG. 5, and FIG. 7 is a perspective view of the front and rear plate of FIG. FIG. 8 is a cross-sectional structure diagram of each member on the four sides of the front / rear plate.

  As shown in FIG. 5, the front / rear plate 20 is perpendicular to the inner peripheral edges 25 of the sides 21, 22, 23, and 24 of the rectangular frame, and is opposite to the side to be attached to the switchboard body 10. Is extended. A conventional front and rear plate 20 is formed by bending a steel plate having a thickness of 1.6 mm (1.6 t) into a substantially L-shaped cross section to form upper, lower, left, and right sides 21, 22, 23, and 24 (see FIG. 6) and welding. What was joined (refer FIG. 5) was fastened and fixed to the main body 10 of the switchboard with the stud nut. The 1.6t front and rear panels provide the diagonal dimension accuracy of the front and back of the switchboard body, which can be twisted and deformed during movement, loading and transportation, and the diagonal dimension that is very important for the switchboard is distorted. There was a problem.

  The present invention has been made in view of the above-mentioned problems, and by adopting a folding structure on the front and rear plates and fixing by bolts and nuts to the switchboard body, the strength of the switchboard as a whole is improved. The purpose is to improve the efficiency of installation work on the main body.

In order to solve the above-mentioned problems, the front and rear plates of the switchboard according to claim 1 of the present invention are front and rear plates for attaching a door to the front or rear surface of the cabinet of the switchboard, and are composed of a rectangular frame. The upper, lower, left, and right sides of the body are joined by welding a frame plate having a U-shaped cross section at the end of each side so that the U-shaped openings face each other. The door mounting portion is fixed to the switchboard main body, and extends from the inner peripheral edge of the other side surface of the frame body at a right angle to the outer peripheral direction.
Because the front and rear panels of the switchboard of the present invention are configured as described above, the strength as a frame body is significantly increased compared to the conventional front and rear panels, so when this is fixed to the front or back of the switchboard body The diagonal dimensional accuracy of the front and back of the switchboard body is increased, and the effects of twisting and deforming during movement, loading and transportation are significantly reduced.

According to a second aspect of the present invention, the front and rear plates of the switchboard are characterized in that the front and rear plates of the first aspect are fixed to the front or rear surface of the switchboard main body with bolts and nuts.
The front and rear panels of the switchboard according to the present invention are configured as described above, so that the sticking to the switchboard body is extremely strong and the mounting work efficiency to the switchboard body is improved compared to the conventional fixing method using studs and nuts. There is an effect of doing.

According to a third aspect of the present invention, the front / rear plate of the switchboard is characterized in that the front / rear plate according to the first or second aspect is a steel plate having a thickness of 2.3 t to 3.2 t.
By configuring the front and rear panels of the switchboard of the present invention as described above, the twist, deformation and distortion due to the improvement of the strength of the front and rear panels themselves are significantly reduced compared to the conventional steel plate with a thickness of 1.6 t. This has the effect of being

By taking the above-mentioned means, the front and rear plates of the switchboard of the present invention have a significantly increased strength as a frame compared to the conventional front and rear plates, so when this is fixed to the front or back of the switchboard body, The diagonal dimensional accuracy of the front and back of the switchboard body is increased, and twisting and deformation during movement, loading and transportation are significantly reduced.
In addition, the front and back plates are fixed to the front or back of the switchboard body with bolts and nuts, so that the attachment to the switchboard body is extremely strong and the attachment work to the switchboard body is much stronger than the conventional fixing method using studs and nuts. Efficiency is improved.
In addition, by using a steel plate having a thickness of 2.3t to 3.2t for the front and back plates, the strength of the front and back plates themselves is improved compared to that of a conventional steel plate having a thickness of 1.6t, and the entire switchboard Twist, deformation, and distortion can be significantly reduced.

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a front and back plate of the present invention. FIG. 2 is a perspective view of a state before the members on the four sides of the front and rear plate in FIG. 1 are welded together. FIG. 3 is a perspective view showing a state in which the front and rear plates of FIG. 1 are to be attached to the front surface or the back surface of the switchboard body.
The end portions of the four sides 31, 32, 33, and 34 of the front and rear plates of FIG. 2 are joined together by welding to assemble the front and rear plates 30 of FIG. Then, the assembled front and rear plate 30 is fixedly attached to the front or rear surface of the switchboard body 10 with bolts and nuts. As shown in FIG. 3, a plurality of bolt / nut mounting holes 11 for drilling the front / rear plate 30 with bolts / nuts are attached at appropriate positions on the front and rear frame portions of the switchboard body 10. A plurality of bolt / nut mounting holes 35 are drilled on the front / rear plate 30 side at positions corresponding to the bolt / nut mounting holes 11 of the switchboard body 10.
Each member of the four sides 31, 32, 33, and 34 of the front and back plate 30 uses a steel plate having a thickness of 2.3t to 3.2t. However, the size of the switchboard and the weight of the entire switchboard including the equipment to be installed therein are determined. In consideration of the thickness of the steel plate, it is preferable to select it.

4A is an enlarged view of a cross section (a-a cross section in FIG. 2) of the right side member 33 on the four sides of the front back plate 30. Compared with the enlarged view (FIG. 8) of the cross-section (cross-section bb in FIG. 6) of the right-side member 23 on the four sides of the conventional front-back plate 20, the cross-sectional structure of each member of the front-back plate 30 of the present invention is conventional. Since it has a substantially U-shaped channel structure compared to the cross-section of each member of the front and rear plate 20, the structure is much stronger in strength.
FIG. 4B is a partial cross-sectional view showing a bolt / nut mounting state of the right side member 33 and the switchboard body 10 when the front and back plate 30 is attached to the switchboard body 10, and a bolt nut of the right side member 33 of the front and back plate 30. An example of a cross section of a portion of the mounting hole 35 is shown. When the front / rear plate 30 is attached to the front or rear surface of the switchboard body 10, the bolt / nut attachment holes 35 of the front / rear plate 30 corresponding to the bolt / nut attachment holes 11 of the switchboard body 10 are aligned and necessary. A number of bolts 41 and nuts 42 are tightened and fixed.

Perspective view of the front and back plates of the present invention The perspective view which shows each member of the four sides of the front back board of this invention The perspective view which shows the attachment of the front back board of this invention (A) Enlarged cross-sectional view taken along line aa in FIG. 2 (B) Enlarged cross-sectional view showing the mounting state of the front back plate A perspective view of a conventional front and back plate The perspective view which shows each member of the four sides of the conventional front back plate The perspective view which shows the attachment of the conventional front back plate The cross-sectional enlarged view which the bb line in FIG. 6 shows

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Switchboard main body 11 Bolt / nut mounting hole 20 Conventional front back plate 21 Upper side member of conventional front back plate 22 Lower side member of conventional front back plate 23 Right side member of conventional front back plate 24 Left side of conventional front back plate Member 25 Inner peripheral edge of conventional front and rear plate 26 Door attachment portion of conventional front and rear plate 30 Front rear plate of the present invention 31 Upper side member of front rear plate of the present invention 32 Lower side member of front rear plate of the present invention 33 Present device Right side member of the front back plate of the present invention 34 Left side member of the front back plate of the present invention 35 Bolt / nut mounting hole of the front back plate of the present invention 36 Door mounting portion of the front rear plate of the present invention 37 Inside of the front back plate of the present invention Perimeter 41 Bolt 42 Nut

Claims (3)

  It is a front back plate that attaches a door to the front or back of the cabinet of the switchboard, and is made of a rectangular frame. Are joined by welding at the end of each side so as to face each other, and the surface on one side of the frame is fixed to the switchboard body, and the outer periphery from the inner periphery of the surface on the other side of the frame A front and rear panel of a switchboard, characterized in that a door mounting portion is extended at right angles to the direction.   The front / rear plate of the switchboard according to claim 1, wherein the front / rear plate is fixed to a front surface or a rear surface of the switchboard body with bolts and nuts.   The front / rear plate of a switchboard according to claim 1 or 2, wherein the front / rear plate is a steel plate having a thickness of 2.3t to 3.2t.

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