JPH07336818A - Enclosure box for enclosed switchboard and assembly method of enclosed switchboard using it - Google Patents

Abstract

PURPOSE:To provide an enclosure box, for an enclosed switchboard, in which the assembly time of the enclosed switchboard can be reduced, in which a housing apparatus and an internal constitution member can be attached to the enclosed switchboard without performing a heavy-physical labor and a high-place operation and in which the structure strength of the bottom part of the enclosure box for the enclosed switchboard can be enhanced. CONSTITUTION:A floor part 20 is constituted of a floor plate 21a which is arranged in parallel with the installation face of an enclosed switchboard and of strength constitution parts 21b which are installed perpendicularly to the floor plate 21a. Frame bodies 30, 40, 50 are divided into at least two parts in the depth direction of the enclosed switchboard. A housing apparatus and an internal constitution member are fixed respectively in parallel in at least two out of the frame bodies 30, 40, 50. Thereby, the assembly time of the enclosed switchboard is reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the structure of a closed box of a closed switchboard that houses a plurality of electric devices and a method of assembling the closed switchboard using the closed box.

[0002]

2. Description of the Related Art A conventional closed box structure of a closed switchboard and a method of assembling the closed switchboard using the closed box will be described, for example, using a closed switchboard in which a drawer type breaker cradle is housed in two upper and lower stages. FIG. 11 is a side sectional view of a closed switchboard in which a drawer-type circuit breaker cradle is housed in upper and lower two stages in a closed box of a conventional closed switchboard. In the figure, the outer cover of the closed box 101 of the closed switchboard includes a front door 101a, a top plate 101b, a floor plate 101c, a side cover 101d, and a back cover 101e. The outer cover of the closed box 101 is made of a metal plate, and blocks the inside and the outside of the closed box 101. Further, the front door 101a, the top plate 101b, the side cover 101d, and the back cover 101e.
Is integrally assembled with a frame such as a vertical column 103 (FIGS. 12 and 13) fixed on the floor plate 101c by bolts or the like. Here, the structure of the conventional floorboard 101c will be described with reference to FIG. FIG. 12 is a structural diagram showing a floor plate of a conventional closed box. 12 (a) is a top view of the floorboard, and FIG. 12 (b) is a cross section XII b-XII in FIG. 12 (a).
12B and 12C are cross-sectional views taken along the line XII c-XII in FIG.
c. In the figure, the floor board 101c is made of a single metal plate such as an iron plate and has a thickness of 3.2 mm, for example. Further, the floor board 101c has a lead-in portion 11 for the cable 6 (FIG. 11) connected to the load-side branch conductor 5 (FIG. 11).
0, and a lead-in portion 111 for a control cable (not shown) such as an ammeter installed on the door surface of the control compartment 12 (FIG. 11) is provided at a predetermined position. In addition, around the retracting portion 110 of the cable 6 and the retracting portion 111 of the control cable, mounting seats 110a and 1 for sealing plates (not shown) that seal the retracting portion 110 and the retracting portion 111, respectively.
11a is provided on the floor board 101c. These sealing plates are provided with holes corresponding to the shapes of the cable 6 and the control cable, respectively, and even after the cable 6 and the control cable have penetrated the floor plate 101c, the retractable portion 110 and the retractable portion 111 are covered and closed. The box 101 is closed.
In addition, in the state shown in the figure, at both ends of the floor plate 101c, L
The V-shaped channel 102 is fixed by welding.
Further, a plurality of vertical columns 103 are fixed to the L-shaped channel 102 by welding at predetermined positions.
In the conventional method for assembling a closed switchboard using a closed box, first, the L-shaped channel 102 and the plurality of vertical columns 103 are fixed to the floor plate 101c (details will be described later).

Returning to FIG. 11, storage devices such as a drawer type circuit breaker 1, a cradle 2 and a bus bar 3 are mounted in predetermined positions inside the closed box 101. In the state shown in the drawing, the drawer type circuit breaker 1 is inserted into each of the test positions in the upper and lower two-stage cradle 2. The drawer type circuit breaker 1 is provided with wheels (not shown) so that the drawer type circuit breaker 1 can move in the left-right direction (hereinafter abbreviated as "depth direction") in the cradle 2 toward the drawing. When the draw-out circuit breaker 1 is placed at the operating position in the cradle 2, the movable circuit contactor (not shown) of the draw-out circuit breaker 1 is insulated and supported by the bushing to connect the main circuit terminal 2a of the cradle 2. To fit. A bus bar 3 is provided through the space of the board in a direction perpendicular to the plane of the drawing (hereinafter abbreviated as "width direction"). The bus bar 3 and each one of the main circuit terminals 2a are connected by a power supply side branch conductor 4. Main circuit terminal 2a
The load-side branch conductor 5 is connected to the other of the two, and the cable 6 is connected to the end of the load-side branch conductor 5.
The power supply side branch conductor 4 is insulated and supported by the insulator 7a, and the load side branch conductor 5 is insulated and supported by the insulators 7b, 7c and 7d. Further, the load-side branch conductor 5 penetrates the instrument current transformer 8. Inside the closed box 101, upper and lower circuit breaker compartments 9, busbar compartments 10, and cable compartments 11 are provided for each circuit of these storage devices by a partition member described later.
And a control compartment 12. still,
The upper and lower circuit breaker compartments 9 shown in the figure are each composed of a single upper and lower cradle 2.
Further, inside the closed box 101, a large number of internal components such as mounting members and partition members are provided. That is, the attachment member is for fixing each of the above-mentioned storage devices in the closed box 101, and is an L-shaped frame 104, U-shaped frames 105a and 105d, and the like. In addition, the partition wall member divides the internal space of the closed box 101 into each storage device and the circuit of the busbar, and protects the protective plate 10.
6, a partition cover 107, a cover 108, and the like.
First, in the attachment member, the L-shaped frame 104
Are provided in the full width direction of the closed box 101, and the upper cradle 2 is fixed. In addition, U-shaped frame 1
05a and 105d are provided on the partition cover 107 and the cover 108 in the width direction of the closed box 101, respectively, and fix the insulators 7a and 7d, respectively. Next, in the partition member, the upper and lower protective plates 106
Are provided in the full width direction of the closed box 101 to partition the cable compartment 11. Further, a partition cover 107 and a cover 108 are provided in the width direction of the closed box 101 to partition the busbar compartment 10. The mounting member and the partition member are fixed to the vertical column 103 at a predetermined position directly or indirectly via other internal constituent members.

Next, a method of assembling a closed switchboard using the above-mentioned conventional closed box will be described below. As described above, first, the plurality of vertical columns 103 are L-shaped channels 10.
It is fixed to the floor board 101c through the 2 (FIG. 12). Subsequently, a mounting member such as the L-shaped frame 104 is fixed to the predetermined vertical column 103 by welding or bolts. Then, the respective storage devices and internal constituent members are sequentially fixed to predetermined positions of the closed box 101 by welding or bolts.
The height of the closed switchboard is, for example, 2300 mm, and storage devices such as the upper cradle 2 arranged above the predetermined height, the load side branch conductor 5 and the current transformer 8 for the instrument, and the protective plate. In the mounting work of the internal components such as 106, the worker carries out the mounting work using a stepladder or a workbench. The weights of the cradle 2 and the current transformer 8 for the instrument are, for example, 30 kg and 15 kg. A trolley is used, or a plurality of workers carry out the mounting work while lifting these heavy objects. Here, the work of mounting the upper cradle 2 will be described with reference to FIG. FIG. 13 shows FIG.
1 is a cross section XIII-XIII of FIG. In the figure, first, the two ends of two L-shaped frames 104 are the floor plates 1 of the vertical columns 103.
It is fixed by welding at a predetermined height from 01c. Then, after the upper cradle 2 is lifted by a crane and placed at a predetermined position on the L-shaped frame 104, the upper cradle 2 is attached to the L-shaped frame 104 by bolts. In addition, in the mounting work of the cradle 2 in the upper stage, the worker mounts it on a stepladder or a workbench. In addition, after the upper cradle 2 is attached to the L-shaped frame 104, the four covers 109 are welded or bolted to the upper cradle 2 and the vertical column 103 as shown in the figure to close the closed box 1.
The inner space of 01 is divided into a control compartment 12, a busbar compartment 10 and a cable compartment 11.

[0005]

In the conventional structure and assembling method described above, the storage equipment and the internal components of the closed switchboard are sequentially fixed to the plurality of vertical columns 103 fixed in the direction perpendicular to the floor plate 101c. Therefore, it takes time to position and attach the storage device and the internal components, and it is difficult to reduce the assembly time of the closed switchboard. Further, since the floor board 101c of the closed box 101 is composed of only one metal plate, the floor board 1 of the closed box 101 is
01c does not have sufficient structural strength, and when the closed switchboard is moved by, for example, a roller pulling work using a roller, the storage devices such as the drawer type circuit breaker 1 are removed from the closed box 101 and the closed switchboard floor board 101c It was necessary to prevent the load from being applied. Further, in the work of mounting the storage device and the internal components arranged above the predetermined height, it is necessary for the worker to perform work in a high place using a stepladder or a workbench. In addition, when attaching a heavy object that exceeds a predetermined weight, it is necessary for an operator to perform a heavy lifting operation to lift the heavy object.

The present invention has been made in order to solve the above problems, and it is easy to perform the positioning work and the mounting work of the storage equipment and the internal constituent members, and it is possible to reduce the assembly time of the closed switchboard. It is intended to provide a closed box for a switchboard. It is another object of the present invention to provide a method for assembling a closed switchboard that allows the storage device and internal components to be attached to the closed switchboard without performing work at high places or heavy muscle work. Another object of the present invention is to provide a closed box of a closed switchboard having a large structural strength that enables the closed switchboard to be moved while the storage device is housed in the closed box.

[0007]

According to a first aspect of the present invention, there is provided a closed box for a closed switchboard, wherein an internal space is divided into a plurality of compartments for each circuit of an electric device and a storage device such as a busbar. A plurality of frame bodies divided into at least two in the depth direction of the closed switchboard, to which the storage device and the internal constituent members are fixed, and the plurality of frame bodies provided in parallel to the installation surface of the closed switchboard. It is characterized by comprising a floor plate for fixing the frame body, and a floor part having a strength component provided in a direction perpendicular to the floor plate.

Further, in the closed box of the closed switchboard according to the invention of claim 2, in addition to the one described in claim 1,
The strength component is provided on the side of the installation surface of the floor plate.

Further, in the closed box of the closed switchboard according to the invention of claim 3, in addition to the one described in claim 2,
A guide rail for guiding the storage device and a mounting seat for fixing the storage device are provided on the floor plate.

Further, in the closed box of the closed switchboard according to the invention of claim 4, in addition to the one described in claim 1,
The strength component is provided on the inner space side of the floor plate.

Further, in the closed box of the closed switchboard according to the invention of claim 5, in addition to the one described in claim 1,
At least one attachment reference member serving as an attachment reference surface for the storage device and the internal component is provided on the frame body in a direction perpendicular to the floor.

Further, in the closed box of the closed switchboard according to the invention of claim 6, in addition to the one described in claim 5,
The mounting reference member is provided on the frame body on a boundary surface between two adjacent compartments.

Further, in the closed box of the closed switchboard according to the invention of claim 7, in addition to the one described in claim 1,
It is characterized in that an engagement means for engaging the two adjacent frame bodies with each other is provided.

Further, in the closed box of the closed switchboard according to the invention of claim 8, in addition to the one described in claim 7,
The engaging means is provided on one of the two adjacent frame bodies, the engaging piece having a tip protruding downward, and the other of the two adjacent frame bodies. And a groove that engages with the engaging piece.

Further, in the closed box of the closed switchboard according to the invention of claim 9, in addition to the one described in claim 7,
The engaging means is provided on one of the two adjacent frame bodies, the tip of which is a spherical engagement member, and the other of the two adjacent frame bodies. It is characterized by comprising a groove that engages with the engaging member.

In the method for assembling a closed switchboard according to a tenth aspect of the present invention, the mounting reference member provided on the frame body is arranged substantially horizontally, and the upper side and the mounting reference member are provided. The storage device and the internal constituent members are assembled from both lower sides.

According to the eleventh aspect of the invention, in the method for assembling a closed switchboard, the mounting reference member provided on the frame is arranged substantially horizontally, and the upper side and the mounting reference member are arranged above and below the mounting reference member. In a method of assembling a closed switchboard for assembling the storage device and the internal component from both sides of the lower side, after the storage device and the internal component are assembled from the upper side, the storage device and the internal configuration of the lower side It is characterized in that the frame is rotated by 180 degrees before the members are assembled.

[0018]

In the closed box of the closed switchboard configured as described above, the frame body to which the storage device of the closed switchboard and the internal constituent members are attached is divided into at least two in the depth direction of the closed switchboard. The storage device of the closed switchboard and the internal constituent members can be fixed in parallel for each frame, and the assembly time of the closed switchboard can be reduced.
Further, since the floor portion is composed of a floor plate arranged in parallel to the installation surface of the closed switchboard and a strength component provided in a direction perpendicular to the floor plate, the structural strength of the floor portion becomes sufficient, The closed switchboard can be moved by pulling the rollers without removing the storage device of the switchboard.

Further, in the floor portion of the closed box, since the strength component is provided on the installation surface side of the floor plate arranged in parallel with the installation surface of the closed switchboard, the structural strength of the floor portion becomes sufficient, and the closed switchboard is closed. You can move the closed switchboard by pulling the rollers without removing the storage device.

Further, in the floor of the closed box, since the strength component is provided on the installation surface side of the floor plate arranged in parallel with the installation surface of the closed switchboard, the structural strength of the floor becomes sufficient, and the closed switchboard is closed. You can move the closed switchboard by pulling the rollers without removing the storage device. Also, since the floor is provided with a guide rail for guiding the storage device and a mounting seat for fixing the storage device,
It becomes easy to attach and fix the storage device to the closed box.

Further, in the floor of the closed box, since the strength component is provided on the inner space side of the floor plate arranged in parallel with the installation surface of the closed switchboard, the structural strength of the floor becomes sufficient, and the closed switchboard is closed. You can move the closed switchboard by pulling the rollers without removing the storage device.

Further, since at least one mounting reference member serving as a mounting reference surface for the storage device and the internal constituent members is provided in the frame body in a direction perpendicular to the floor, the closed box for the storage device and the internal structural members is provided. The positioning work and the mounting work to and from it become easy.

Further, since the mounting reference member is provided in the frame body on the boundary surface between the two adjacent compartments, the positioning work and the mounting work of the storage device and the internal components to the closed box can be facilitated, Moreover, the partition structure of the closed box of the closed switchboard can be made compact.

Further, since the engaging means for engaging the two adjacent frame bodies with each other is provided, it becomes possible to easily engage and fix the two adjacent frame bodies, and the closed box of the closed switchboard. The structural strength of can be increased.

Further, an engaging piece having a tip protruding downward is provided on one of the two adjacent frame bodies, and a groove engaging with the engaging piece is provided on the other two adjacent frame bodies. Since the two adjacent frame bodies can be easily engaged and fixed, the structural strength of the closed box of the closed switchboard can be increased.

Further, since the engaging member having a spherical tip is provided on two adjacent frame bodies, and the groove engaging with the engaging member is provided on the other adjacent two frame bodies. ,
It is possible to easily engage and fix the two adjacent frame bodies, and increase the structural strength of the closed box of the closed switchboard.

Further, since the mounting reference member provided on the frame is arranged substantially horizontally and the storage equipment and the internal constituent members are assembled from both upper and lower sides of the mounting reference member, the storage equipment and The positioning work of the internal components can be facilitated, and the closed switchboard can be assembled without performing the work at height and the work for the heavy muscles.

Further, the mounting reference member provided on the frame body is arranged substantially horizontally, and the frame body is 180 degrees so that the storage device and the internal constituent members can be assembled to the mounting reference member from above the mounting reference member. Since it rotates, positioning work of the storage equipment and internal components can be facilitated,
Moreover, it is possible to assemble the closed switchboard without performing work at height and work on heavy muscles.

[0029]

【Example】

(Embodiment 1) A structure of a closed box of a closed switchboard according to the present invention and a method of assembling a closed switchboard using the closed box will be described by using, for example, a closed switchboard in which a drawer type circuit breaker cradle is housed in two upper and lower stages. FIG. 1 is a side sectional view of a closed switchboard in which a cradle for a drawer type circuit breaker is housed in two stages in a vertical direction in a closed box of a closed switchboard according to the present invention, and FIG. It is a perspective view showing the floor of a closed box and a plurality of frames in a closed switchboard stored in. In the following description, the left-right direction, the up-down direction, and the vertical direction toward the paper surface of FIG. 1 are the depth direction, the height direction, and the width direction of the closed switchboard, respectively. In FIG. 1, an outer cover of a closed box 100 of a closed switchboard includes a front door 100a, a top plate 100b, a side cover 100c, a back cover 100d, and a floor 20. The outer cover of the closed box 100 is made of a metal plate, and blocks the inside and the outside of the closed box 100. A shown in FIG.
B and C show divisions of the first, second, and third frames 30, 40, and 50 (FIG. 2) divided in the depth direction of the closed switchboard, respectively. The dimensions of the sections A, B and C are, for example, 400 mm, 1300 mm and 300 m.
m. Further, the front door 100a, the top plate 100b, the side cover 100c, and the back cover 100d are the first and second
And attached to the third frame bodies 30, 40 and 50 with bolts or the like. As shown in FIG. 2, the first, second and third frame bodies 3 are divided into three in the depth direction of the closed switchboard.
0, 40 and 50 are each made of a plurality of steel materials such as L-shape and U-shape, and are fixed by bolts, rivets or the like in a direction perpendicular to the floor plate 21a of the floor portion 20.
Also, the first, second and third frame bodies 30, 40 and 50
Is a steel material such as an L-shape or a U-shape provided at each of four corners in the depth direction, the height direction, and the width direction of the closed switchboard to attach the outer cover, the storage device, and the internal components of the closed switchboard. The structure of the frame and the components of the frame are not limited to those of this embodiment and those of FIG. First, the first frame body 30 includes four L-shaped frames 31a, 31b provided at four corners in the depth direction of the closed switchboard.
31c and 31d, four U-shaped frames 32a, 32b, 32c provided at four corners in the height direction of the closed switchboard
And 32d and L-shaped frames 33a, 33b, 33c and 33d provided at four corners in the width direction of the closed switchboard. Next, the second frame body 40 has four L-shaped frames 41a, 41b, 41c and 41d provided at four corners in the depth direction of the closed switchboard, and four L-shaped frames provided at four corners in the height direction of the closed switchboard. U-shaped frame 42
It is composed of a, 42b, 42c and 42d. Further, the frame-shaped attachment reference member 44 is fixed to the four L-shaped frames 41a, 41b, 41c and 41d of the frame body 40 so as to be perpendicular to the floor portion 20. The frame-shaped mounting reference member 44 is provided with a plurality of mounting holes for fixing the storage device and the internal components of the closed switchboard with bolts or the like. The attachment reference member 44 is provided on the first, second, and third frames 30, 40, and 50 in a direction perpendicular to the floor portion 20 to provide a storage device for the closed switchboard and internal components. When it is attached to the closed box 100, it serves as a reference surface for attachment. However, the shape is not limited to the frame shape (details will be described later). Subsequently, the third frame body 50 includes four L-shaped frames 5 provided at four corners in the depth direction of the closed switchboard.
1a, 51b, 51c and 51d, four U-shaped frames 52a provided at four corners in the height direction of the closed switchboard,
52b, 52c and 52d and L-shaped frames 53b and 53d provided in the width direction of the closed switchboard. One end of the L-shaped frame 53b is fixed to the L-shaped frame 51a and the U-shaped frame 52c,
The other end is an L-shaped frame 51b and a U-shaped frame 52
It is fixed to d and. Similarly, an L-shaped frame 53
One end of d is fixed to the L-shaped frame 51c and the U-shaped frame 52c, and the other end is L-shaped frame 51d.
And is fixed to the U-shaped frame 52d. The U-shaped frame 42c, the U-shaped frame 52a, the U-shaped frame 42d, and the U-shaped frame 52b that form the boundary surface between the second frame 40 and the third frame 50 are
A fastening portion 60 described later is provided to fix the second frame body 40 and the third frame body 50. Further, in the first, second and third frame bodies 20, 30 and 40, an L-shaped frame 31c on the floor 20 side provided in the depth direction of the closed switchboard,
31d, 41c, 41d, 51c and 51d are provided with a plurality of mounting holes, and each of the first, second and third frame bodies 2 is provided.
The floors 20, 30 and 40 are fixed to each other with bolts or the like.

Here, the structure of the floor of the closed box according to the present invention will be described with reference to FIG. FIG. 3 is a structural view showing a floor of a closed box which is an embodiment of the present invention. In addition, FIG.
Is a top view of the floor, and FIG. 3 (b) is a cross section of FIG. 3 (a).
IIIb-IIIb, and FIG. 3 (c) are cross-section III of FIG. 3 (b).
c-IIIc. In the figure, a floor portion 20 is a floor plate 21a provided in parallel with an installation surface of a closed switchboard,
It is composed of strength components 21b and 21c provided on the installation surface side of the floor plate 21a in a direction perpendicular to the floor plate 21a. The floor plate 21a has the above-mentioned mounting holes for fixing the first, second, and third frames 30, 40, and 50,
The lead-in part 22a of the cable 6 (FIG. 1) connected to the load side branch conductor 5 (FIG. 1), and the control compartment 12
A lead-in portion 22b of a control cable (not shown) such as an ammeter installed on the door surface of FIG. 1 is provided at a predetermined position. The strength forming portion 21b is a channel having an L-shaped cross section, and the tip of the other side of the L-shape is the floor plate 21a so that one side of the L-shape is parallel to the installation surface of the closed switchboard.
It is provided on the installation surface side of the outer peripheral four sides. The strength forming portion 21c is a channel having a U-shaped cross section, and the U-shaped open end is provided on the installation surface side of the floor plate 21a so that one side of the U-shape is parallel to the installation surface of the closed switchboard. There is. Around the retracting portion 22a of the cable 6 and the retracting portion 22b of the control cable, a plurality of mounting holes for sealing plates (not shown) for sealing the retracting portion 22a and the retracting portion 22b are provided in the floor plate 21a. ing. These sealing plates are provided with holes that respectively match the shapes of the cable 6 and the control cable, and even after the cable 6 and the control cable have penetrated the floor plate 21a, the lead-in portion 22a is formed.
The closing box 100 is closed by covering the retractable portion 22b and the retracting portion 22b. As described above, in the floor portion 20 of the present invention, the floor board 21a and the floor board 21 that are arranged in parallel with the installation surface of the closed switchboard.
Since it is composed of the strength constituting portions 21b and 21c provided in the direction perpendicular to a, the structural strength of the floor portion 20 becomes sufficient. Then, the closed switchboard can be moved by a roller pulling operation using a roller without removing the storage device of the closed switchboard. In addition, the strength component 21b
And 21c are provided on the installation surface side of the floor plate 21a in a direction perpendicular to the floor plate 21a, respectively, so that a sealing plate (seal plate) for sealing the retracting portion 22a and the retracting portion 22b between the floor plate 21a and the mounting surface ( The mounting seats 110a and 111a (shown in FIG. 12 of the conventional example) for the sealing plate are unnecessary by disposing bolts (not shown) or the like.

Here, the structure of the engaging portion of the closed box according to the present invention will be described with reference to FIG. FIG. 4 is an explanatory view showing an operating state of the engaging portion of the closed box according to the embodiment of the present invention. Further, FIG. 4A shows a state before engagement, and FIG. 4B shows a state after engagement. It should be noted that the drawing is simplified to show only a portion necessary for explaining the engaging portion 60. In the figure, the engaging portion 60 includes an engaging piece 61 provided on the U-shaped frame 52b of the third outer frame 50 and a groove 62 provided on the U-shaped frame 42d of the second frame 40. Composed. The engaging piece 61 is provided with a tip 61a protruding downward. Further, an engaging groove 62 a having the same size as the thickness of the engaging piece 61 is provided in the groove 62 below the groove 62.
Then, as shown in the figure, the U-shaped frame 52b and the U-shaped frame 42d are docked so that the engaging piece 61 is inserted into the groove 62, and the tip 61a of the engaging piece 61 is engaged with the engaging groove 62a. U-shaped frame 52 to be below
b is slid downward. In this way, the adjacent second frame body 40 and third frame body 50 are easily engaged and fixed. After the second frame body 40 and the third frame body 50 are fixed, the tip 61a of the engagement piece 61 is arranged below the engagement groove 62a, so that, for example, the third frame body is used. Even if 50 is pulled in the direction opposite to the second frame 40 in the depth direction of the closed switchboard, the third frame 50 does not come off from the second frame 40. Further, since the second frame body 40 and the third frame body 50 are fixed, the closed box 10 of the closed switchboard
The structural strength of 0 is improved. The engagement piece 61 is provided on the U-shaped frame 42d of the second frame 40, and the groove 62 is formed in the third frame 42d.
The outer frame 50 may be provided on the U-shaped frame 52b.
In addition, the engaging portion 60 is connected to the first frame body 30 and the second frame body 4.
The first frame body 30 is provided on the U-shaped frame 32c and the U-shaped frame 42a and the U-shaped frame 32d and the U-shaped frame 42b which form the boundary surface with 0, respectively.
And the second frame 40 may be fixed.

Returning to FIG. 1, inside the closed box 100,
Storage devices such as a drawer type circuit breaker 1, a cradle 2 and a bus bar 3 are mounted at predetermined positions. In the state shown in the drawing, the drawer type circuit breaker 1 is inserted into each of the test positions in the upper and lower two-stage cradle 2. The drawer type circuit breaker 1 is provided with wheels so as to be movable in the cradle 2 in the depth direction of the closed switchboard (not shown).
When the draw-out circuit breaker 1 is placed at the operating position in the cradle 2, the movable circuit contactor (not shown) of the draw-out circuit breaker 1 is insulated and supported by the bushing to connect the main circuit terminal 2a of the cradle 2. To fit. Further, a bus bar 3 is provided in the width direction of the closed switchboard so as to penetrate through the space of the switchboard. The bus bar 3 and each one of the main circuit terminals 2a are connected by a power supply side branch conductor 4. A load-side branch conductor 5 is connected to the other of the main circuit terminals 2a, and a cable 6 is connected to an end of the load-side branch conductor 5. The power supply side branch conductor 4 is insulated and supported by the insulator 7a, and the load side branch conductor 5 is insulated and supported by the insulators 7b, 7c and 7d. Further, the load side branch conductor 5 is a current transformer 8 for an instrument.
Penetrates through. Inside the closed box 100, upper and lower circuit breaker compartments 9 and busbar compartments 1 are provided for each circuit of these storage devices by a partition member described later.
0, a cable compartment 11 and a control compartment 12. The upper and lower circuit breaker compartments 9 shown in the figure are each composed of a single upper and lower cradle 2. Furthermore, the closed box 10
A large number of internal constituent members such as a mounting member and a partition member are provided inside 0. That is, the mounting member is
Each of the storage devices described above is fixed in the closed box 100, and includes an L-shaped frame 70 and a U-shaped frame 71a.
And 71d. Further, the partition member is a closed box 10.
The inner space of 0 is divided by each storage device and the circuit of the busbar, and includes a protection plate 72, a partition cover 73, a cover 74, and the like. First, in the mounting member, an L-shaped frame 70 is provided in the width direction of the closed box 100 to fix the upper cradle 2. Further, U-shaped frames 71a and 71d are respectively provided on the partition cover 73 and the cover 74 in the width direction of the closed box 100, and fix the insulators 7a and 7d, respectively. Next, in the partition member, the upper and lower protection plates 72 are provided in the width direction of the closed box 100 to partition the cable compartment 11. Further, the partition cover 73 and the cover 74 are provided in the entire width direction of the closed box 100 to partition the busbar compartment 10. The above internal constituent members are directly or indirectly fixed to the second frame 40 via other internal constituent members. It should be noted that the description of the storage devices and internal components fixed to the first and third frames 30 and 50 is omitted.

Next, a method for assembling a closed switchboard using the closed box of the present invention will be described below. As described above, in the closed box 100 of the present invention, the frame body to which the storage device and the internal components are attached is divided into the first, second and third frame bodies 30, 40 and 50. ing. Therefore, in the method for assembling the closed switchboard according to the present invention, the mounting operation of the storage device and the internal components to the first, second and third frames 30, 40 and 50 can be performed in parallel. Here, the work of mounting the cradle 2 on the mounting reference member 44 will be described with reference to FIG. FIG. 5 is a perspective view showing a structure in which the cradle 2 is attached to the attachment reference member 44. In the figure, first, the attachment reference member 44 is horizontally arranged so as to be parallel to the installation surface of the closed switchboard. Next, after the cradle 2 is lifted by a crane and placed at a predetermined position of the attachment reference member 44, the cradle 2 is attached to the attachment reference member 44 with a bolt. The L-shaped frames 41a, 41b, 41c and 41d of the second frame body 40 shown in FIG. 2 are fixed to both ends of the attachment reference member 44 in the left and right directions toward the paper surface of FIG. And the L-shaped frames 41a, 4
One end of 1b, 41c and 41d is arranged on a dolly or the like, and the mounting reference member 44 is horizontally arranged at a predetermined height so that an operator can easily perform the mounting work (not shown). In this way, the positioning work and the mounting work of the cradle 2 to the second outer frame 40 become easy. Further, the worker can perform the mounting work without performing the work at a high place using a stepladder or a workbench. Further, the worker can perform the mounting work without performing the heavy stiffening work for lifting the heavy cradle 2. Similarly, other storage devices and internal components are attached to the second frame 40. First, referring to FIG.
Internal components such as the L-shaped frame 70 disposed on the 0a side, the upper and lower protective plates 72, and the partition cover 73 are respectively arranged from the upper side of the horizontally arranged mounting reference member 44 in FIG. It is fixed to the second frame 40.
After that, the second frame 40 is brought into a state of being rotated 180 degrees (the state of the paper surface of FIG. 5 being rotated 180 degrees). And FIG.
At the rear cover 100d from the attachment reference member 44
The internal components such as the bus bar 3 and the storage devices such as the current transformer 8 for instruments and the cover 74, which are arranged on the side, are arranged from the bottom of the horizontally arranged mounting reference member 44 in FIG. It is fixed to the frame body 40. In this way, the second frame body 40 provided with the attachment reference member 44 is rotated 180 degrees,
Since the storage device and the internal constituent members are attached to the mounting reference member 44 from the upper side of the mounting reference member 44, the positioning work of the storage device and the internal constituent members can be facilitated, and the work at high places and the heavy stiffening work can be performed. Instead, the storage device and the internal components can be attached to the attachment reference member 44. The L-shaped frame 70 arranged on the front door 110a side of the mounting reference member 44, internal components such as the upper and lower protective plates 72, and the partition cover 73 are mounted on the mounting reference member 44 arranged horizontally. After being given
The second frame 40 is rotated 180 degrees and the mounting reference member 44 is rotated.
The bus bar 3, the storage device such as the current transformer 8 for instruments, and internal components such as the cover 74, which are arranged on the side of the rear cover 100d, and internal components such as the cover 74 are attached to the attachment reference member 44. Instead of rotating 180 degrees, the L-shaped frames 41a, 41b, 41 of the second frame body 40
The height of the trolley on which one end of c and 41d is placed is increased, and the inside of the cover 74 and the storage device such as the bus bar 3 and the current transformer 8 for the instrument arranged on the back cover 100d side of the mounting reference member 44. The constituent members may be mounted from below the mounting reference member 44 horizontally arranged on the paper surface of FIG. As is clear from the drawings such as FIG. 1, the mounting reference member 44 is provided on the boundary surface between the circuit breaker compartment 9 and the bus bar compartment 10. Also,
As a result, for example, positioning work and mounting work of the cradle 2 forming the circuit breaker compartment 9 to the second outer frame 40 can be facilitated, and the partition structure of the circuit breaker compartment 9 and the bus bar compartment 10 can be made compact. .

(Embodiment 2) FIG. 6 is a structural view showing a floor portion of a closed box which is an embodiment of the present invention. In addition, FIG.
6A is a top view of the floor portion, and FIG. 6B is FIG. 6A.
VIb-VIb of FIG. 6, and FIG. 6C is a cross section of FIG. 6B.
VIc-VIc. The same parts as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted. The difference from the first embodiment is that the guide rail 23 for guiding the storage device and the mounting seat 24 for fixing the storage device are provided on the floor plate 21a of the floor portion 20. That is, in this embodiment, an electric device equipped with wheels or a storage device such as a cradle is guided to the mounting position of the closed box 100 by the guide rail 23 and fixed by the mounting seat 24 at the mounting position of the storage device. It As described above, in this embodiment, the mounting operation of the storage device is facilitated, and the floor portion 20
Since the structural strength of is sufficient, it is possible to move the closed switchboard with the storage equipment attached.

(Embodiment 3) FIG. 7 is a structural view showing a floor portion of a closed box which is an embodiment of the present invention. Also, FIG.
7A is a top view of the floor portion, and FIG. 7B is FIG. 7A.
VIIb-VIIb of FIG. 7C, and FIG. 7C is a section VIIc-VIIc of FIG. 7B. The same parts as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted. The difference from Example 1 is that
Only the strength component 21b of the strength components 21b and 21c is provided on the inner space side of the closed switchboard of the floor plate 21a in a direction perpendicular to the floor plate 21a. Therefore, in this embodiment, the above-mentioned mounting holes for fixing the first, second and third frames 30, 40 and 50 are
As shown in FIG. 7, it is provided on one side of the L-shape parallel to the installation surface of the strength component portion 21b. In addition, a plurality of mounting seats 25 and 26 for a sealing plate (not shown) for sealing the pull-in portion 22a and the pull-in portion 22b are provided on the floor plate 21a around the pull-in portion 22a of the cable 6 and the pull-in portion 22b of the control cable. Is provided. In this embodiment, since the floor plate 21a is in contact with the installation surface, the seismic resistance of the closed box of the closed switchboard is improved as compared with that of the first embodiment.

(Embodiment 4) FIG. 8 is a perspective view showing a structure in which the cradle 2 is attached to the second frame 40 using the attachment member 75. The same parts as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted. The drawings are simplified to show only the parts necessary for explaining the present embodiment. Further, the difference from the first embodiment is that the cradle 2 is fixed to the U-shaped frames 42a and 42b of the second frame body 40 via a mounting member 75. Further, in this embodiment, as shown in FIG. 8, the U-shaped frames 42a and 42b of the second frame body 40 are horizontally arranged. Then, the cradle 2 to which the mounting member 75 is fixed is lifted by a crane to
After placing the U-shaped frames 42a and 42b of the frame 40 of FIG.
The cradle 2 is attached to the U-shaped frames 42a and 42b. As described above, in this embodiment, the U-shaped frames 42a and 42b of the second frame body 40 serve as mounting reference planes for the cradle 2, and the U-shaped frames 42a and 42b of the second frame body 40 serve as mounting reference surfaces. It also functions as a member. Further, in this embodiment, the second mounting reference member
The U-shaped frames 42 a and 42 b of the frame body 40 are provided on the boundary surface between the circuit breaker compartment 9 and the control compartment 12, and the second outer frame 40 of the cradle 2 is provided.
Positioning work and installation work on the
Circuit breaker compartment 9 and control compartment 12
The partition structure of and can be made compact.

(Embodiment 5) FIG. 9 is an explanatory view showing an operating state of an engaging portion of a closed box according to an embodiment of the present invention. Further, FIG. 9A shows a state before engagement and FIG. 9B shows a state after engagement. The same parts as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted. It should be noted that the drawing is simplified to show only a portion necessary for explaining the engaging portion 60. Further, the difference from the first embodiment is that, as shown in FIG.
That is, the groove 63 engaging with 1 is tapered so that the width of the groove 63 decreases downward. That is, the U-shaped frame 52b and the U-shaped frame 42d are docked so that the engaging piece 61 is inserted into the groove 63, and the U-shaped frame 52b is slid downward, whereby the engaging piece 61 is inserted. Are firmly fixed by the tapered groove 63.

(Sixth Embodiment) FIG. 10 is an explanatory view showing an operating state of an engaging portion of a closed box according to an embodiment of the present invention.
Further, FIG. 10A shows a state before engagement, and FIG. 10B shows a state after engagement. The same parts as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted. It should be noted that the drawing is simplified to show only a portion necessary for explaining the engaging portion 60. Further, the difference from the first embodiment is that, as shown in FIG.
An engaging member 64 having a spherical tip 64a is provided on the U-shaped frame 52b of the third frame body 50, and a groove 65 having a substantially circular opening 65a and a tapered groove 65b is provided in the second frame. It is provided on the U-shaped frame 42b of the body 40. Then, similar to the first embodiment, the U-shaped frame 52b and the U-shaped frame 4 are arranged so that the tip 64a of the engaging member 64 is inserted into the opening 65a of the groove 65.
The engagement member 64 is firmly fixed by the tapered groove 65b by docking with 2d and sliding the U-shaped frame 52b downward. In this embodiment,
Since the tip 64a of the engaging member 64 is formed in a spherical shape, after the second frame body 40 and the third frame body 50 are fixed, the second frame body 40 is stronger than that of the first embodiment. The frame body 40 and the third frame body 50 are fixed.

[0039]

Since the present invention is configured as described above, it has the following effects.

In the closed box of the closed switchboard configured as described above, the frame to which the storage device of the closed switchboard and the internal components are attached is divided into at least two in the depth direction of the closed switchboard. The storage device of the closed switchboard and the internal constituent members can be fixed in parallel for each frame, and the assembly time of the closed switchboard can be reduced. Further, since the floor portion is composed of a floor plate arranged in parallel to the installation surface of the closed switchboard and a strength component provided in a direction perpendicular to the floor plate, the structural strength of the floor portion becomes sufficient, The closed switchboard can be moved by pulling the rollers without removing the storage device of the switchboard.

Further, in the floor of the closed box, since the strength component is provided on the installation surface side of the floor plate arranged in parallel with the installation surface of the closed switchboard, the structural strength of the floor becomes sufficient, and the closed switchboard is closed. You can move the closed switchboard by pulling the rollers without removing the storage device.

Further, in the floor of the closed box, since the strength component is provided on the installation surface side of the floor plate arranged in parallel with the installation surface of the closed switchboard, the structural strength of the floor becomes sufficient, and the closed switchboard is closed. You can move the closed switchboard by pulling the rollers without removing the storage device. Also, since the floor is provided with a guide rail for guiding the storage device and a mounting seat for fixing the storage device,
It becomes easy to attach and fix the storage device to the closed box.

Further, in the floor of the closed box, since the strength component is provided on the inner space side of the floor plate arranged in parallel with the installation surface of the closed switchboard, the structural strength of the floor becomes sufficient, and the closed switchboard is closed. You can move the closed switchboard by pulling the rollers without removing the storage device.

Further, since at least one mounting reference member serving as a mounting reference surface of the storage device and the internal components is provided on the frame body in a direction perpendicular to the floor, the closed box of the storage device and the internal components is closed. The positioning work and the mounting work to and from it become easy.

Further, since the mounting reference member is provided on the frame body on the boundary surface between the two adjacent compartments, the positioning work and the mounting work of the storage device and the internal components to the closed box can be facilitated. Moreover, the partition structure of the closed box of the closed switchboard can be made compact.

Further, since the engaging means for engaging the two adjacent frame bodies with each other is provided, it becomes possible to easily engage and fix the two adjacent frame bodies, and the closed box of the closed switchboard. The structural strength of can be increased.

Further, an engaging piece having a tip protruding downward is provided on one of the two adjacent frame bodies, and a groove engaging with the engaging piece is provided on the other two adjacent frame bodies. Since the two adjacent frame bodies can be easily engaged and fixed, the structural strength of the closed box of the closed switchboard can be increased.

Further, since the engaging member having a spherical tip is provided on one of the two adjacent frame bodies, and the groove engaging with the engaging member is provided on the other two adjacent frame bodies. ,
It is possible to easily engage and fix the two adjacent frame bodies, and increase the structural strength of the closed box of the closed switchboard.

Further, since the mounting reference member provided on the frame is arranged substantially horizontally and the storage device and the internal constituent members are assembled from both the upper side and the lower side of the mounting reference member, the storage device and the internal component are assembled. The positioning work of the internal components can be facilitated, and the closed switchboard can be assembled without performing the work at height and the work for the heavy muscles.

Further, the mounting reference member provided on the frame body is arranged substantially horizontally, and the frame body is 180 degrees so that the storage device and the internal components are assembled to the mounting reference member from above the mounting reference member. Since it rotates, positioning work of the storage equipment and internal components can be facilitated,
Moreover, it is possible to assemble the closed switchboard without performing work at height and work on heavy muscles.

[Brief description of drawings]

FIG. 1 is a side sectional view of a closed switchboard in which a drawer type circuit breaker cradle is housed in upper and lower two stages in a closed box of a closed switchboard according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a floor portion and a plurality of frames of a closed box of a closed switchboard that is an embodiment of the present invention.

FIG. 3 is a structural diagram showing a floor of a closed box that is Embodiment 1 of the present invention.

FIG. 4 is an explanatory diagram showing an operating state of an engaging portion of the closed box that is Embodiment 1 of the present invention.

FIG. 5 is a mounting reference member 4 according to an embodiment of the present invention.
4 is a perspective view showing a structure in which the cradle 2 is attached to the cradle 4. FIG.

FIG. 6 is a structural diagram showing a floor of a closed box that is Embodiment 2 of the present invention.

FIG. 7 is a structural diagram showing a floor portion of a closed box which is Embodiment 3 of the present invention.

FIG. 8 is a perspective view showing a structure in which the cradle 2 is attached to the second frame body 40 which is Embodiment 4 of the present invention.

FIG. 9 is an explanatory diagram showing an operating state of an engaging portion of a closed box which is Embodiment 5 of the present invention.

FIG. 10 is an explanatory diagram showing an operating state of an engaging portion of a closed box which is Embodiment 6 of the present invention.

FIG. 11 is a side cross-sectional view of a closed switchboard in which a drawer type circuit breaker cradle is housed in upper and lower two stages in a closed box of a conventional closed switchboard.

FIG. 12 is a structural view showing a floor plate of a conventional closed box.

13 is a cross-section XIII-XIII of the closed switchboard of FIG.

[Explanation of symbols]

20 floor part, 21a floor plate, 21b, 21c strength component part, 30, 40, 50 frame body, 44, mounting reference member, 60 engaging part.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toshifumi Sato 8 Horai-cho, Marugame City Mitsubishi Electric Corporation Marugame Factory

Claims (11)

[Claims] 1. A closed box of a closed switchboard in which an internal space is divided into a plurality of compartments for each circuit of an electric device and a storage device such as a bus bar, and the storage box is divided into at least two in the depth direction of the closed switchboard. A plurality of frame bodies to which the equipment and the internal constituent members are fixed, a floor plate provided in parallel with the installation surface of the closed switchboard to fix the plurality of frame bodies, and provided in a direction perpendicular to the floor plate. And a floor having a strength component, and a closed box of a closed switchboard. 2. The closed box of a closed switchboard according to claim 1, wherein the strength component is provided on the installation surface side of the floor plate. 3. The closed box for a closed switchboard according to claim 2, wherein the floor plate is provided with a guide rail for guiding the storage device and a mounting seat for fixing the storage device. 4. The closed box of a closed switchboard according to claim 1, wherein the strength component is provided on the inner space side of the floor plate. 5. The frame is provided with at least one attachment reference member serving as an attachment reference surface of the storage device and the internal component member in a direction perpendicular to the floor portion. Closed box of the closed switchboard described in. 6. The closed box of a closed switchboard according to claim 5, wherein the attachment reference member is provided on the frame body on a boundary surface between two adjacent compartments. 7. The closed box for a closed switchboard according to claim 1, further comprising engaging means for engaging two adjacent frame bodies with each other. 8. The engaging means is provided on one of the two adjacent frame bodies, the engaging piece having a tip protruding downward, and the other of the two adjacent frame bodies. The closed box for a closed switchboard according to claim 7, wherein the closed box is provided with the frame and configured with a groove that engages with the engagement piece. 9. The engaging means is provided on one of the two adjacent frame bodies, the engaging member having a spherical tip, and the other frame of the two adjacent frame bodies. The closed box of the closed switchboard according to claim 7, wherein the closed box of the closed switchboard is provided in the body and includes a groove that engages with the engagement member. 10. The mounting reference member provided on the frame body is arranged substantially horizontally, and the storage device and the internal constituent member are assembled from both upper and lower sides of the mounting reference member. A method for assembling a closed switchboard characterized by the following. 11. The mounting reference member provided on the frame is arranged substantially horizontally, and the storage device and the internal component are assembled from both upper and lower sides of the mounting reference member. In the method for assembling a closed switchboard, the frame body is rotated 180 degrees after the storage device and the internal component member are assembled from the upper side and before the storage device and the internal component member on the lower side are assembled. A method for assembling a closed switchboard, characterized by: