JPH08163718A - Protective plate support structure of distribution panel - Google Patents

Abstract

PURPOSE: To provide the protective plate support structure of distribution panel in which a sufficient wiring space can be ensured and at the sane time the miniaturization of a distribution panel can be realized and wiring operation can be easily and quickly performed. CONSTITUTION: The first shaft 82 of a pin member 78 is positioned at the tip part of an arm member 62 extended out from a strut 48 as the rotary shaft of a protective plate 42 and the tip end part of the arm member 62 is extended out so as to stride over a gutter space which is used as a wiring space to be able to provide the strut 48 inside the gutter space. The first shaft 82 is pulled out from the rotary bearing 86 of the protective plate 42 and the through hole 88 of the tip part of the arm member 62 by pulling the intermediate part 78 of the pin member 78 and at the same time, if a second shaft 84 is pulled out from the through hole 90 of the strut 48 and the through hole of the base end part of the arm member 62, the protective plate 42 can be removed from the arm member 62 and at the same time the arm member 62 can be removed from the strut 48.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protective plate support structure for supporting a protective plate located on the front side of a distribution device in a switchboard.

[0002]

2. Description of the Related Art A distribution board, for example, a low-voltage distribution board, is constructed by accommodating distribution equipment such as a main breaker and a branch breaker. In such a switchboard, a protective plate is provided on the front side of the power distribution device when the outer door is opened.

Here, the protective plate is supported by four pillars projecting from the board bottom toward the four corners.
One end side of the protective plate corresponds to this so that the protective plate can be opened by rotating to the front from either the left or right side in the board width direction.
It is attached to the column of the book via a hinge. On the other hand, the other end of the protective plate is closed by screwing a knurled screw from the front side of the holding plate to the nuts provided on the two corresponding columns in the closed state of the protective plate. The holding plate can be opened and the knurled screw can be removed from the nut to open the holding plate. When the holding plate is closed, the operating portion of the power distribution device is exposed from the protective plate, and the operating portion can be operated from the front side of the protective plate. When installing the power distribution equipment on the power distribution board, wiring, or performing subsequent maintenance inspections, open the protective plate.

By the way, in the switchboard on the back side of the protective plate,
Gutter spaces are provided on both left and right sides of the power distribution equipment,
The gutter space is a wiring space.

Conventionally, the support columns for supporting the protective plate enter the gutter space and occupy a part thereof, so that the wiring space becomes narrower by that amount and the wiring work is troublesome.
If the wiring space is to be expanded, the switchboard is inevitably increased in size.

Further, since one end side of the protective plate is attached to the supporting column via a hinge, in order to make the axial direction of the nut and the knurled screw coincide with each other on the other end side of the protective plate, a gap between the supporting column side and the protective plate side is set. High dimensional accuracy is required for positioning.

[0007]

In view of the above facts,
It is an object of the inventions according to claims 1 to 4 to provide a protective plate support structure for a switchboard that can secure a sufficient wiring space, realize a downsizing of the switchboard, and perform wiring work easily and quickly. .

Further, in addition to the above object, the invention according to claim 2 or claim 3 protects a switchboard for supporting the protective plate so that the positioning between the protective plate side and the support side can be achieved with appropriate dimensional accuracy. An object is to provide a plate support structure.

[0009]

In order to solve the above-mentioned problems, a protective plate supporting structure for a switchboard of the present invention according to claim 1 is provided with pillars projecting to the left and right in the board width direction from the board bottom to the front. Then, turn one end of the protective plate through the pivot shaft so that the protective plate located on the front side of the power distribution equipment can be opened from either the left or right side of the panel in the front direction. In the protective plate support structure of the switchboard, the other end of the protective plate is fixedly supported by the column corresponding to the other end so that the protective plate is held / released in the closed state. In the column on the dynamic support side, the base end engages with the column and is detachably provided on the tip of the column, and the tip is separated in parallel with the arm member extending outward from the column in the board width direction. Forming opposing first and second shafts at both ends The first shaft is bent in a U shape, and the first shaft serves as the rotary shaft in the inserted state by continuously penetrating the rotary bearing formed on the protection plate and the tip of the arm member in a freely insertable and removable manner. The shaft includes a pin member that continuously penetrates the post and the base end portion of the arm member in a freely insertable and removable manner when the first shaft is inserted and removed to prevent the arm member from coming out of the post in the inserted state. Characterized by the configuration.

According to a second aspect of the present invention, there is provided a protective plate support structure for a switchboard according to the first aspect of the present invention, in which one of the columns on the fixed support side is attached to the front end of the column and the protective plate of the protective plate is attached. In a closed state, it abuts against the protective plate to prevent further closing of the protective plate, and a receiving body having an insertion hole for inserting an operation member operated from the front side of the protective plate, and held by this receiving body, The protruding portion of the operating member that is inserted into the through hole and protrudes out of the through hole can be engaged by being located coaxially with the insertion direction axis of the operating member, and the engagement prevents the protective plate from opening. However, as long as the operating member is inserted into the insertion hole, an engaging member that is movable within a predetermined range in the operation hole radial direction with respect to the operation hole so as to be coaxial with the insertion direction axis of the operation member. , Is provided.

According to a third aspect of the present invention, there is provided a protective plate supporting structure for a switchboard according to the second aspect of the present invention, wherein in the configuration of the second supporting column, both the supporting column on the rotation supporting side and the supporting column on the fixed supporting side are provided with a receiving body. Both of the arm members are selectively attachable.

According to a fourth aspect of the present invention, there is provided a protective plate support structure for a switchboard according to the first aspect, wherein the arm member is made of synthetic resin and the pin member is made of metal. It is characterized in that it is grounded between the protective plate.

[0013]

According to the constitutions of claims 1 to 4, generally, in the switchboard on the back side of the protective plate, gutter spaces are provided on the left and right in the board width direction of the power distribution device, and the gutter space serves as a wiring space. used. Since the first shaft of the pin member as the rotation shaft of the protection plate is located at the tip of the arm member extended from the column, the tip of the arm member is extended so as to straddle the gutter space. Can be provided inside the gutter space, and the gutter space can be effectively used as a wiring space.

Further, after the other end of the protective plate is unfixed and the protective plate is opened, the intermediate portion of the pin member is pulled,
If the first shaft is removed from the rotary bearing of the protection plate and the tip of the arm member, and the second shaft is removed from the support and the base end of the arm member, the protection plate is removed. The arm member can also be removed from the column. Removal of the protective plate and removal of the arm member can be performed easily and quickly without the need for a separate tool. In this state, it is possible to install and wire distribution equipment, and then perform maintenance and inspection. Since the arm member that straddles the gutter space can be removed from the column, the work such as wiring in the gutter space becomes extremely easy.

As a result, a sufficient wiring space can be secured, the size of the switchboard can be reduced, and the wiring work can be performed easily and quickly.

According to the second or third aspect of the present invention, on the other end side of the protective plate, the operating member is operated from the front side of the protective plate to engage with the engaging member on the supporting column side, and the protective plate supports the supporting column. Fixed to. Here, as long as the operation member is inserted into the insertion hole of the receiving body, the engagement member moves in the insertion hole radial direction even if the axis of the insertion hole is not on the insertion direction axis line of the operation member, and the axis line of the engagement member. Can be located on the insertion direction axis of the operating member,
The operating member can be engaged with the engaging member.

As a result, the positioning between the protective plate side and the support side can be achieved with appropriate dimensional accuracy.

According to the structure of claim 3, the support column has compatibility with the support column on the rotation support side and the support column on the fixed support side, and after the support column is provided, the direction in which the protective plate is opened and closed is set. It is also possible to change left and right.

According to the structure of claim 4, since the arm member is made of synthetic resin, even if the arm member comes into contact with the protective plate, the contact state is softened, and the shape of the arm member can be liberalized. Increase. On the other hand, since the pin member is made of metal, sufficient strength can be obtained as the rotation shaft of the protection member, and
Sufficient strength can be obtained to prevent the arm member from falling off the pillar, and it also has a grounding function with the protective plate.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a protective plate supporting structure for a switchboard according to the present invention will be described with reference to FIGS.

As shown in FIGS. 1 and 2, in a low voltage switchboard 10 as a switchboard, a board box 12 is formed in a rectangular box shape, and the front side of the board box 12 is open. Inside the board box 12, a pair of mounting plates 14 and 16 that are spaced apart and opposed to each other in the width direction of the board are provided (the upper side of the board is shown by an arrow UP). Each mounting plate 14, 16
Is elongated in the vertical direction, and both ends (upper and lower ends) in the longitudinal direction are fixed to the board bottom with fixing bolts 18.

Further, in the board box 12, a main unit 20 is provided in an upper part, a branching unit 22 is provided in a central part, and an option unit 24 is provided in a lower part.

The master unit 20 is constructed by attaching a master breaker (power distribution device) 26 to a holding plate 28.

The branch unit 22 is constructed by mounting a plurality of branch breakers (power distribution devices) 30 on a holding plate 32 so that the branch breakers (power distribution devices) 30 are continuously arranged in two rows.

The option unit 24 is constructed by attaching remote control relays, magnet switches and the like (power distribution equipment) 34 to the holding plate 36 so that they are continuously arranged in two rows.

Holding plates 28, 32, so that each unit 20, 22, 24 extends between the mounting plates 14, 16.
36 is attached to the mounting plates 14, 16. A plurality of female screw portions (not shown) are formed on the mounting plates 14 and 16 at predetermined intervals in the vertical direction, and the holding plate 2 of each unit 20, 22, 24 is formed.
8, 32 and 36 are screwed and fastened to the female threaded portions with mounting bolts. It is possible to change the attachment positions of the holding plates 28, 32, 36 of the units 20, 22, 24 along the up-down direction by making the internally threaded portions to be screwed different.

Further, each unit 20, 22, 24 can be assembled in advance in the factory, not in the place where the switchboard 10 is installed, and the work efficiency is improved. Furthermore, each unit 2
Various power distribution devices included in 0, 22, and 24 can be selected, and by combining the units, it is possible to easily cope with a wide variety of small quantity products.

Each unit 20, 22, 24 includes a connection between a main breaker 26 and a branch breaker 30 after it is mounted on the mounting plates 14, 16 and each unit 2
The connection between 0, 22, and 24 is made.

With the units 20, 22, and 24 attached, each unit 2 is placed in the board box 12.
Gutter spaces 38, 4 on both left and right sides of 0, 22, 24
0 is formed, and the gutter spaces 38 and 40 are used as wiring spaces.

On the other hand, a protective plate 42 is provided on the front side of each unit 20, 22, 24. The protection plate 42 is supported by four columns 44, 46, 48, 50. Prop 4
4, 46, 48, 50 are projected from the mounting plates 14, 16 to the front side, and two are provided on each of the mounting plates 14, 16. Each of the mounting plates 14 and 16 is located above and below it. The protective plate 42 is opened so that the protective plate 42 is opened to the front from either the left or right side in the board width direction, in the present embodiment, is opened from the left (the opening direction is shown by an arrow OP).
One end side (right end side) of 2 is rotatably supported by the columns 48 and 50 via a rotation shaft described later, and the protection plate 42 is held / released in a closed state. The other end side (left end side) of 42 is fixedly supported by the columns 44 and 46.

As shown in FIGS. 3 to 5, the support columns 48 on the rotation support side (the support columns 48 located on the upper side will be described, but the same applies to the support columns 48 on the lower side). Looking at the board width direction it is a U-shape open to the outside,
Back piece 5 for connecting a pair of side pieces 52 and both side pieces 52 facing each other
4 and. A seat piece 56 is provided at the base end of the support column 48, and a bolt hole is formed in the center of the seat piece 56. The seat piece 56 is bolted to the mounting plate 16 through the bolt hole.
The column 48 is fixed to the mounting plate 16 by stopping. The seat piece 56 is provided with a bent piece 60 that is bent along the side edge of the mounting plate 16, so that even if there is only one bolt 58, rotation of the support column 48 around the bolt 58 axis is reliably prevented. It

The arm member 6 is attached to the protruding end of the column 48.
Two are provided. The base end of the arm member 62 is a column 48.
It fits inside, and the tip portion extends from the inside of the column 48 to the outside in the board width direction. The base end portion of the arm member 62 includes an L-shaped piece 64 that is bent in an L-shape so as to sandwich the back piece 54 of the column 48. In addition, the side piece 52 of the column 48 is provided with the arm member 62.
A small piece 68 bent toward the opposite side is provided at the tip edge, except for the portion where the base end of the column fits, and the column 48 faces the small piece 68.
Inside, a protrusion 66 is formed at the base end of the arm member 62. The protrusion 66 contacts the small piece 68, and the L-shaped piece 64 makes the back piece 5
By sandwiching 4 between them, the stepped portion 63 formed on the arm member 62 abuts on the projection 72 described later, whereby the posture of the arm member 62 is maintained. Arm member 6
The side piece 52 of the support column 48 faces the base end of the support column 2, and
A rectangular notch 70 is formed on the tip end side of 8 leaving a convex portion 72. An elastic piece 74 is formed on the arm member 62 corresponding to the notch 70. The arm member 62 is hollow in the region of the elastic piece 74, and the elastic piece 74 is cut at its periphery except for a part (the cut is shown by 75), and the elastic piece 74 is elastically elastic from the outside to the inside. It can be transformed. A projecting portion 76 is formed on the outer surface of the elastic piece 74, and when the base end portion of the arm member 62 is fitted into the support column 48, the projecting portion 76 is pushed by the projecting portion 72 and the elastic piece 74 is pushed by the arm member 62. The arm member 62 is elastically deformed so as to enter the inside, and after fitting, elastically returns in the notch 70 and engages with the edge of the notch 70 to prevent the arm member 62 from coming out. In order to make the arm member 62 escape, the protrusion 76 may be pressed to elastically deform the elastic piece 74.

On the other hand, the arm member 62 is provided with a pin member 78. Both ends of the pin member 78 are a first shaft 82 and a second shaft 84 via an intermediate portion 80, and the first shaft 82 and the second shaft 84 are connected to each other.
The shaft 84 is bent and formed in a U shape so as to face the shaft 84 in parallel with each other. The first shaft 82 serves as the rotation shaft of the protection plate 42, and a rotation bearing 86 formed on the protection plate 42 and a through hole 88 formed at the tip of the arm member 62 are continuously inserted and removed. To penetrate through. The second portion 84 is the first shaft 8
When 6 is inserted / removed, the through hole 90 formed in the convex portion 72 of the support column 48 and the through hole 92 formed in the base end portion of the arm member 62 are continuously inserted and removed so as to be in an inserted state. Then, the escape of the arm member 62 is prevented.

In the pin member 78, the first shaft 82 is the second
The rotation bearing 86 of the protection plate 42, which is longer than the shaft 84 and is positioned so that the tip portion of the arm member 62 is interposed therebetween, can be accommodated. Of course, the lengths of the first shaft 82 and the second shaft 84 are not limited to such a relationship.

A retaining washer 120 is fitted to the second shaft 84 of the pin member 78 to prevent the pin member 78 from accidentally coming out. A retaining washer may be provided on the first shaft 82.

The fixed support-side support column 44 (the upper support column 44 will be described, but the same applies to the lower support column 46. The fixed support-side support columns 44, 46 are the above-mentioned rotation support-side support columns. 6) to 8), the receiving body 94 is attached to the tip end portion thereof. The receiving member 94 is fitted in the support column 44 and sandwiches the back piece 54 (L-shaped piece 64 (the arm member 6 described above)).
2) and a pair of flange pieces 96 and 98 formed so as to sandwich the convex portion 72 of the column 44 in the projecting direction of the column 44. The flange piece 98 on the notch 70 side is formed to be short to facilitate mounting in the direction of the arrow IN.

The tip surface of the receiving member 94 contacts the protective plate 42 when the protective plate 42 is closed, and prevents the protective plate 42 from further closing. An insertion hole 100 is formed in the holding plate 42, and the male screw portion 104 of the knurled screw 102 as an operation member operated from the front side of the holding plate 42 in the closed state of the holding plate 42 inserts the insertion hole 43 of the holding plate 42. It can be inserted through the insertion hole 100. Inside the receiving body 94, a rectangular cavity 106 communicating with the insertion hole 100 is formed. In the cavity 106, a communication port 108 that communicates with the outside is formed on the side facing the back piece, and from this communication port 108, a rectangular plate-shaped square nut (engaging member) 110 is inserted into the cavity 106 by an arrow IT.
The insertion hole 1 in the cavity 106.
00 is movable in the radial direction, and rotation of the square nut 110 around the axis is prevented.

The insertion hole 100 is formed in a mortar shape so that the knurled screw 102 can be smoothly introduced into the cavity 106.

When the knurled screw 102 inserts the insertion hole 100 and the part protruding to the outside of the insertion hole 100 (the part reaching the cavity 106) is screwed and fastened to the nut member 110, the protective plate 42 is attached to the knurled screw 102. Head 103 and receiver 9
It is fixed to the support column 44 in a state of being sandwiched between 4 and 4. vice versa,
If the knurled screw 102 is loosened, the column 4 of the protection plate 42
The fixation to 4 is released.

With the protective plate 42 closed, the main breaker 26
The operation knob 27 and the operation knob 31 of the branch breaker 30 are exposed to the front side from the protective plate 42 through the openings 130 and 132, and the operation knobs 27 and 31 can be operated.

An outer door (not shown) is provided on the front side of the protective plate 42 of the board box 12 so as to be openable and closable. The operation knobs 27 and 31 are operated by opening the outer door.

According to the above construction, since the first shaft 82 of the pin member 78 as the rotation shaft of the protection plate 42 is located at the tip of the arm member 62 extended from the support column 48, the gutter space 38 is formed. The column 48 can be provided inside the gutter space 38 by extending the tip end portion of the arm member 62 so as to straddle the gutter space 38, and the gutter space 38 can be effectively used as a wiring space.

Further, after fixing the other end of the protection plate 42 to open the protection plate 42, the intermediate portion 7 of the pin member 78 is removed.
8 to pull the first shaft 82 into the rotary bearing 8 of the protective plate 42.
6 and the through hole 88 at the tip of the arm member 62, and the second shaft 84 is removed from the through hole 90 of the support column 48 and the through hole 92 at the base end of the arm member 62 accordingly. The protection plate 42 can be removed from the arm member 62, and the arm member 62 can also be removed from the support column 48. The removal of the protective plate 42 and the removal of the arm member 62 can be performed easily and quickly without the need for a separate tool. In this state, it is possible to install and wire distribution equipment, and then perform maintenance and inspection. Attach the arm member 62 straddling the gutter space 38 to the support 48
If it can be removed from, the work such as wiring in the gutter space 38 becomes extremely easy.

As a result, a sufficient wiring space can be secured, the size of the switchboard can be reduced, and the wiring work can be performed easily and quickly.

On the other end of the protection plate 42, the knurled screw 102 is operated from the front side of the protection plate 42 to engage with the nut member 110 on the support column 44 side, and the protection plate 42 is fixed to the support column 44. It Here, as long as the knurled screw 102 is inserted into the insertion hole 100 of the receiving body 94, the insertion hole 10
Even if the axis of 0 is not on the axis of the knurled screw 102,
The nut member 110 moves in the radial direction of the insertion hole 100 so that the axis of the nut member 110 can be located on the axis of the knurled screw 102, and the knurled screw 102 can be engaged with the nut member 110.

As a result, the positioning between the protective plate side and the column side can be achieved with appropriate dimensional accuracy.

Further, the columns 44, 46, 48 and 50 are the columns 48 and 50 on the rotation support side and the columns 44 and 4 on the fixed support side.
Compatible with 6 and also supports struts 44, 46, 48, 5
It is also possible to change the opening / closing direction of the protection plate 42 left and right after providing 0.

It is also possible to make the columns 44, 46, 48, 50 of metal, the arm member 62 of synthetic resin, and the pin member 78 of metal. Since the arm member 62 is made of synthetic resin, the arm member 62 is protected by the protective plate 42.
The contact state is softened even if it contacts with. Further, the freedom of the shape of the arm member 62 is increased. On the other hand, the pin member 78
Since the metal is made of metal, sufficient strength can be obtained as the rotation axis of the protection member 42, and sufficient strength can be obtained to prevent the arm member 62 from falling off the support column 48. It also has a ground function with the plate 42.

Further, since the receiving body 94 is made of synthetic resin, the contact state of the receiving body 94 with the protective plate 42 is softened.

The present invention is not limited to the above embodiment, but various modifications can be made. For example, although the low-voltage switchboard has been described in the above embodiment, the switchboard is not limited to this, and includes an operation panel and the like. Further, the number of columns is not limited to that in the above embodiment.

[0051]

According to the protective plate support structure for a switchboard of the present invention according to claims 1 to 4, a sufficient wiring space can be ensured, the switchboard can be downsized, and wiring work can be performed easily and quickly. You can do it.

According to the protective plate supporting structure for a switchboard of the present invention according to claim 2 or 3, in addition to the above effects,
When supporting the protective plate, positioning between the protective plate side and the column side can be performed with appropriate dimensional accuracy.

[Brief description of drawings]

FIG. 1A is a perspective view showing a low voltage switchboard to which an embodiment of a protective plate support structure for a switchboard of the present invention is applied, with a protective plate open, and FIG. 1B shows a main unit. ,
(C) is a perspective view showing a branch unit, and (D) is a perspective view showing an option unit, respectively.

FIG. 2 is a perspective view showing a low voltage switchboard to which the protective plate support structure for a switchboard according to the present embodiment is applied, with the protective plate closed.

FIG. 3 shows a protective plate support structure for a switchboard of the present embodiment,
It is a disassembled perspective view which concerns on the support | pillar by the side of rotation support.

FIG. 4 shows a protective plate support structure of a switchboard of the present embodiment,
It is an assembly perspective view which concerns on the support | pillar on a rotation support side.

FIG. 5 shows a protective plate support structure for a switchboard of the present embodiment,
It is an assembly view of the support on the rotation support side as seen from the rotation axis direction.

FIG. 6 shows a protective plate support structure for a switchboard of the present embodiment,
It is a disassembled perspective view which concerns on the support | pillar of a fixed support side.

FIG. 7 shows a protective plate support structure for a switchboard of the present embodiment,
It is an assembly perspective view which concerns on the support | pillar on a fixed support side.

FIG. 8 shows a protective plate support structure for a switchboard of the present embodiment,
FIG. 7 is an end view of the stanchion on the fixed support side as seen along the axial direction of the knurled screw.

[Explanation of symbols]

10 Switchboard 26 Main Breaker (Distribution Equipment) 30 Branch Breaker (Distribution Equipment) 34 Remote Control Relay, Magnet Switch, etc. (Distribution Equipment) 42 Protective Plate 44, 46, 48, 58 Strut 62 Arm Member 78 Pin Member 82 1st Shaft 84 Second shaft 86 Rotating bearing 94 Receptor 100 Insertion hole 102 Knurled screw (operation member) 110 Square nut (engaging member)

Claims (4)

[Claims] Claims: 1. Protrusions are provided on the left and right in the width direction of the board, respectively, from the bottom of the board toward the front, and the protective plate located on the front side of the power distribution device can be opened from either one of the left and right sides in the width direction of the board. The one end side of the protective plate is rotatably supported on the support column corresponding to the one end side via the pivot shaft, and the other end side of the protective plate is held at the other end side so as to hold / release the closed state. In a protective plate support structure for a switchboard that is fixedly supported on a column corresponding to, a base end of the column on the rotation support side of the columns is detachably provided at a tip of the column by engaging the column. , An arm member whose tip extends outward from the support in the width direction of the board, and a first shaft and a second shaft that are parallel and spaced apart from each other, and are formed in a substantially U-shape so as to be bent at both ends. 1 axis inserts the rotary bearing formed on the protection plate and the tip of the arm member In the inserted state, the second shaft is inserted through the support column and the base end portion of the arm member so as to be inserted and removed continuously in accordance with the insertion and removal of the first shaft. A protective plate support structure for a switchboard, comprising: a pin member that prevents the arm member from coming out of the column in a state. 2. A fixed support side of the support columns, which is mounted on the tip of the support column and abuts against the protection plate in a closed state of the protection plate to prevent further closing of the protection plate, A receiver having an insertion hole through which an operation member operated from the front side of the protective plate is inserted; a protruding portion of the operation member which is held by the reception member and is inserted into the operation hole to protrude outside the insertion hole; As long as it can be engaged by being located coaxially with the insertion direction axis of the operating member, the engagement prevents the opening movement of the protective plate, and as long as the operation member is inserted into the insertion hole, the insertion direction axis of the operating member The protective plate support structure for a switchboard according to claim 1, further comprising: an engagement member that is movable in a predetermined range in a radial direction of the operation hole with respect to the operation hole so as to be coaxial with the operation hole. 3. The receiving member and the arm member are selectively attachable to both the support column on the rotation support side and the support column on the fixed support side of the support columns. Supporting structure for the protective plate of the switchboard. 4. The protective plate for a switchboard according to claim 1, wherein the arm member is made of synthetic resin, the pin member is made of metal, and a ground is provided between the arm member and the protective plate via the pin member. Support structure.