JP2012120324A - Residential distribution board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a case structure of a residential distribution board which improves strength of the case itself forming the residential distribution board, allows a worker to hold or carry the residential distribution board safely, and secures a gutter space in the residential distribution board which is required for electric wiring.SOLUTION: In a residential distribution board, a side wall, projecting from a peripheral part of a base of a case housing internal devices toward a front surface side, is provided so as to enclose the base. A folded part, in which an edge part of the side wall is folded toward the exterior rear surface side, is formed in the side wall. The side wall, which further projects from an edge part outer periphery in the folded part toward the front surface side and is provided so as to enclose the residential distribution board, is formed to form the case of the residential distribution board.

Description

The present invention relates to a residential distribution board in a house, a store, or the like, and more particularly to a structure of a case constituting a cabinet of a residential distribution board.

A residential distribution board is a cabinet incorporating internal devices such as a main switch, a bus connected to the secondary side of the main switch, and a branch switch connected to the bus. It is used as a service entrance device for electric circuits in houses and the like. The electric circuit to be applied is usually an electric circuit to which an AC 50 Hz or 60 Hz single-phase two-wire electric circuit (100 V) or a single-phase three-wire electric circuit (100/200 V) is applied.

The cabinet constitutes the outline of a residential distribution board, and generally attaches and fixes the inner bottom to which the internal equipment is attached, and forms walls that cover the upper, lower, left, and right sides and the back of the residential distribution board. And a cover provided on the front side of the case so as to cover the front side facing the operation surface side of the internal device.

In such a residential distribution board, as shown in FIG. 4 of Patent Document 1 and FIG. 2 of Patent Document 2, the upper, lower, left and right sides of the case constituting the cabinet are surrounded by side walls. Yes. Then, between the back side of the case and the front side, the periphery of the front side of the side wall is expanded outward by one step to form a stepped portion. When carrying a residential distribution board or attaching it to a wall surface, a finger is placed on the stepped portion and the front side cover is pressed and held.

JP 2006-36769 A JP 2005-229746 A

As described above, the stepped portion is formed in a part of the side wall that protrudes from the base of the case to the front side, and an outwardly enlarged portion is formed, and further, the side wall protrudes toward the front side, It is formed as a series. The step portion is originally intended to regulate the amount of fitting when the residential distribution board is fitted into the opening provided on the wall surface, and is used for carrying the residential distribution board or holding it when it is attached to the wall surface. It is not formed as a part.
For this reason, the said level | step-difference part assumes the following subjects, when it is used as a holding part of the distribution board for houses.

The stepped portion on the side wall of the case is such that the side wall of the gripped portion is the front side when the housing distribution panel is gripped with the front side-back side of the housing distribution panel set to the vertical direction. However, due to the characteristics of the material (resin material or metal material) that composes the case, it is highly resistant to the pulling direction, and the top, bottom, left and right side walls and the base must cooperate. Thus, the weight of the residential distribution board can be dispersed and held as a whole.

However, if the weight of the residential distribution board is heavy, such as when the number of branch circuits of the residential distribution board is large or when many internal devices are installed, There is a possibility that the weight of the residential distribution board cannot be supported and the central part of the residential distribution board may be bent.

Further, when the residential distribution board is gripped with the front side-back side parallel to the top-and-bottom direction, the residential distribution board may be bent similarly. In addition, since the step portions on the left and right side walls of the case are formed along the top and bottom direction of the wall surface to which the residential distribution board is attached, the residential distribution board is held by holding the step portion. In addition to being difficult to grip, the load and stress applied to the gripped part is increased, and the bending force in the surface direction with low side wall resistance is applied, so that the residential power distribution The board is likely to bend and distort, and the case itself and internal equipment may be damaged.

Also, if a residential distribution board is accidentally dropped by gripping a portion that is not originally a gripping section, the operator's legs may be injured or the residential distribution board itself may be damaged. .

In order to increase the strength of the side wall, it is conceivable to increase the thickness of the side wall, but if the thickness is increased, the internal space of the residential distribution board will be compressed, and the electrical wiring inside the residential distribution board There is a problem that the gutter space necessary for the process is reduced.

Therefore, the present invention has been made in view of the above problems, and can improve the strength of the case itself constituting the residential distribution board, and the operator can safely hold and carry the residential distribution board. It is an object of the present invention to provide a housing distribution board case structure that can be used for the electrical wiring and can secure a gutter space inside the residential distribution board necessary for electrical wiring.

The structure of the residential distribution board according to the present invention is configured to solve the above-described problems, and a side wall protruding from the base peripheral edge of the case housing the internal device to the front side surrounds the periphery. In the case of the housing distribution board case provided as described above, the side wall is formed with a folded portion where the edge of the side wall is folded back to the outer back side, and from the outer periphery of the edge at the folded portion, Furthermore, it is good to comprise as a characteristic that the side wall provided so as to protrude from the front side and to surround the distribution board for houses was formed.

According to such a configuration, since the folded portion is formed on the side wall protruding from the base of the case, the strength of the case itself constituting the residential distribution board can be improved. When holding and carrying the residential distribution board, it is possible to suppress bending and distortion of the case, and it is possible to hold and carry it safely.
Moreover, the strength of the case can be further improved by forming the rib from the base to the side wall on the front side inside the case.

Moreover, the structure of the residential distribution board according to the present invention is such that, in the folded portion, a side wall projecting from the peripheral edge of the base portion to the front surface side, and projecting from the outer periphery of the edge portion to the front surface side. A step portion may be provided between the side wall and the side wall as viewed from the front side.

According to such a configuration, by providing the step portion, the inside of the case expands in the forward direction. By causing the electric wire to be wired inside the case along the stepped portion disposed along the periphery of the case, the flow of the electric wire can be rectified, and wiring work can be performed with a sense of unity. In addition, since the turnover portion is formed, the holding allowance as a grasping portion of the residential distribution board is increased, so that the residential distribution board can be stably held.

Moreover, you may comprise the distribution board for houses provided with the said case structure.

According to such a configuration, it is possible to provide a residential distribution board that increases the case strength and is easy to carry and hold.

As described above, according to the present invention, the strength of the case constituting the residential distribution board can be improved, and the operator can safely hold and carry the residential distribution board. In addition, it is possible to provide a housing distribution board case structure that can secure a gutter space inside the residential distribution board necessary for electrical wiring.

The rear view of the residential distribution board which shows 1st Embodiment is shown. The perspective view from the case back side concerning the embodiment is shown. The perspective view from the case front side which concerns on the embodiment is shown. The perspective view from the case inner side front side which concerns on the embodiment is shown. Sectional drawing of the case inner side front side which concerns on the embodiment is shown. The figure showing the conventional distribution board for houses is shown. The figure showing the conventional distribution board for houses is shown.

Next, an embodiment of the present invention will be described in detail with reference to FIGS.

(Overview of residential distribution board)
The residential distribution board 100 according to the first embodiment is used for a single-phase three-wire commercial power circuit. The residential distribution board includes a current limiter, a main switch, a bus connected via a connecting member on the secondary side of the main switch, and a branch switch connected to the bus in the cabinet. In addition, an insole for mounting these internal devices is provided. FIG. 1 shows a view in which the cover constituting the cabinet of the residential distribution board 100 is removed and the internal devices are exposed, 110 is a current limiter mounting portion, 111 is a main switch mounting portion, Reference numeral 112 denotes an insole as a branch switch mounting portion.

The cabinet constitutes an outline of the residential distribution board 100, and generally has a wall that covers and covers the upper, lower, left, and right sides and the rear surface of the residential distribution board by attaching and fixing the inner bottom to which the internal device is attached. A case 120 to be formed and a cover (not shown) provided on the front side of the case so as to cover the front side facing the operation side of the internal device are configured.

The case 120 is provided with a base 101 attached to a wall surface and the like, and a side wall 102 extending from the peripheral edge of the base and projecting to the front side so as to surround the periphery of the base.

For the sake of explanation, the side wall 102 of the case 120 is divided into a first side wall 102a, a second side wall 102b, and a third side wall 102c. One side wall 102a, a side wall that is enlarged one step outward from the front side of the first side wall 102a and is folded back to the back side and then extended to the back side is referred to as a third side wall 102c. The side wall protruding from the outer periphery of the edge of the folded portion 103 to the front side will be described as the second side wall 102b.

The side wall 102 of the case 120 is formed with a folded portion 103 that is folded back to the outer back side of the case. For this reason, the side wall partially has a double structure of 102a and 102c, and the strength of the case side wall can be improved. And it is set as the structure which provides the 2nd side wall 102b which protrudes in the front side further from the outer periphery of the edge part in the said folding | returning part 103, and in the folding | returning part 103, a level | step-difference part exists in the part expanded one step outward from the front side Is formed and configured.

A plurality of reinforcing ribs 104 that connect the first side wall 102a and the third side wall 102c are formed on the inner surface side of the folded portion 103. Thereby, it is set as the structure which can connect the side walls used as the duplex structure by the reinforcement rib, and can improve intensity | strength more. By connecting the side walls with the reinforcing ribs, the resistance to the direction in which the side walls are brought into contact with and away from each other is increased, and the resistance to the direction in which the side walls are rubbed together is also increased. It leads to reduction.

Further, a reinforcing rib 106 is formed on the inner side of the case from the base 101 to the front side of the side wall. Thereby, the displacement of the side wall with respect to the base can be suppressed, which leads to a reduction in bending and distortion of the entire case.

The step 105 is formed along the peripheral edge of the side wall. Due to the stepped portion 105, the inside of the case expands in the forward direction. When an operator performs wiring work, the flow of the electric wire can be rectified by causing the electric wires to be wired inside the case along the stepped portion 105, and the wiring work can be performed with a sense of unity.

In addition, it is divided into the types of electric wires (the upper stage wiring, the lower stage wiring, the grounding wire, etc. of the branch switch arranged over the upper and lower two stages in the residential distribution board) and on the base. Wiring can be performed on the step portion, and the wiring types can be divided and arranged in an orderly manner while giving a sense of unity.

In addition, since the turnover portion is formed, the holding allowance as a grasping portion of the residential distribution board is increased, so that the residential distribution board can be stably held.

Further, a concave portion 103 is formed in the center portion in the vertical direction. The recess 103 is formed from the back side of the base 101 to the front of the case side wall 102, and the recess 103 is also provided so as to protrude from the inside of the case.

When the case 120 is viewed from the back, a recess is formed at the substantially left and right central portion of the base 101 of the case, and the recess is also formed on the side wall extending from the base 101 to the front side as it is. The contact area between the case side wall 102 corresponding to the left and right side portions of the case 120 and the base portion 101 is increased by a dent line, and the base portion 101 of the case 120 and the side wall 102 of the case are three-dimensionally connected and supported, 103 as a whole serves as a reinforcing rib extending from the base 101 to the side surface.

As shown in FIG. 4, the front side of the side wall 102 in the recess 103 is formed such that the first stepped portion 105 extends inward only by a protruding portion of the recess 103 toward the inside of the case. Connected to the wall continuously.

Therefore, as shown in Patent Document 1 and Patent Document 2, the case side wall 102 is bent to the left and right outwards as compared to the case where the upper and lower sides and right and left sides of the case are simply surrounded by the side wall of the case in a square shape. Strength, bending strength in the vertical direction, and the like can be increased, and resistance to bending, twisting, and distortion of the case 120 in the horizontal direction, the vertical direction, and the oblique direction can be increased.

On the other hand, the recess 107 forms a step 108 (referred to as a second step) between the recessed portion of the recess 107 and the original side wall 102 in the vertical direction of the residential distribution board 100. . Further, in the direction from the back side to the front side of the residential distribution board 100, the folded portion 103 formed by expanding one step outward from the recessed portion 107 and the side wall 102 than the stepped portion 105. A large step (third step 109) is formed.

As a result, when carrying the residential distribution board 100 or mounting and holding it on the wall surface, etc., carry and hold the finger by placing the finger on the second step 108 and the third step 109. Thus, the degree of freedom of carrying and holding is increased, and the weight of the residential distribution board in the vertical direction can be stably supported in combination with the reinforced case 120.

In the present embodiment, the second step portion 108 is formed with a slope so that the recessed portion and the original side wall portion are smoothly connected. The recessed portion and the sidewall portion of the main subject may be formed by providing a step with a right angle as in the talk step, but by forming a gentle slope, the step portion 108 and other sidewalls are not steep. The function as a gripping part and the function as a reinforcing rib without giving a visual attention to the stepped part when facing a residential distribution board, giving a sense of unity in design It is something that has both.

  In addition, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the summary of this invention.

For example, the residential distribution board using the case structure of the present invention can be used for a single-phase two-wire electric circuit, a three-phase three-wire electric circuit, etc. in addition to a single-phase three-wire commercial electric circuit. Moreover, it can be applied to a case of a standard board in addition to a residential distribution board, or a metal case instead of a general resin case.

  For example, in the first embodiment, a plurality of recesses 103 formed on the side wall 102 of the case 120 may be provided in the top-and-bottom direction. By increasing the role of the reinforcing rib, it is possible to configure a residential distribution board with increased case strength.

100 Residential distribution board 101 Base 102 Side wall 103 Recess 104 Second step 105 First step 106 Third step 110 Current limiter mounting portion 111 Main switch mounting portion 112 Branch switch mounting portion

Claims (3)

A housing distribution board case structure in which a side wall projecting from the base peripheral edge of a case housing an internal device to the front side is provided to surround the periphery,
The side wall is formed with a folded portion where the edge of the side wall is folded back to the outer back side,
A case of a residential distribution board characterized in that a side wall is provided so as to protrude from the outer periphery of the edge of the folded portion to the front side and to surround the residential distribution board. Construction. In the folded portion,
A side wall protruding from the peripheral edge of the base to the front side;
Between the outer periphery of the edge and the side wall protruding from the front side,
2. The case structure of a residential distribution board according to claim 1, wherein the case has a step portion when viewed from the front side. A residential distribution board comprising the case structure.

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