CN110611247B

CN110611247B - Distribution board shell

Info

Publication number: CN110611247B
Application number: CN201811560104.2A
Authority: CN
Inventors: 服部太辅; 大庭进一
Original assignee: Kawamura Electric Inc
Current assignee: Kawamura Electric Inc
Priority date: 2018-06-14
Filing date: 2018-12-20
Publication date: 2023-05-23
Anticipated expiration: 2038-12-20
Also published as: JP7049937B2; JP2019216575A; CN110611247A

Abstract

The invention provides a switchboard housing, which can use an electric wire inlet and outlet part arranged on the side surface of a housing with embedded specification even if the housing is arranged in an exposed way. The switchboard housing has: a case body (2) which has a back plate (21), side panels (22) surrounding four sides of the back plate (21), and the front surface of which case body (2) is open; a front panel (3) that closes the front surface of the housing main body (2); and a cover frame (4) that covers the entirety of the side panels (22), wherein the side panels (22) are provided with knock-out holes (24) on at least one side panel, the knock-out holes (24) can form holes for the power supply line to enter and exit, and a thinned portion (43) that is easily cut off is formed at a portion of the cover frame (4) that corresponds to the knock-out holes (24).

Description

Distribution board shell

Technical Field

The present invention relates to a housing for a switchboard that houses electrical equipment such as a circuit breaker or information terminal equipment, and more particularly, to a switchboard housing that can be installed in both a manner of being buried in a wall surface and a manner of being exposed from the wall surface.

Background

In a case of a switchboard accommodating a circuit breaker or the like, there are a structure in which a main portion of the case is buried in a wall surface, and a structure in which the main portion is not buried in the wall surface but is entirely exposed from the wall surface. Therefore, a case capable of coping with these two arrangements has been proposed.

For example, the switchboard housing of patent document 1 is provided with a step (step) around the housing, and the back is formed to be smaller by one turn, and the rear can be buried in the wall surface by the step. On the other hand, in the case where the entire housing is exposed and not buried, a cover frame (cover member) is attached around the housing to cope with the case, and the cover frame is formed so as to cover the rear portion of the housing one turn smaller to eliminate the stepped portion.

Prior art literature

Patent literature

Patent document 1: japanese patent laid-open No. 8-205325

Disclosure of Invention

Problems to be solved by the invention

In the case of the structure in which the cover frame is attached to the housing, dust is hard to accumulate in the stepped portion when the cover frame is provided in an exposed state, and the exposed embedded portion is hidden.

However, since the cover frame covering the periphery of the case is formed to have the same width without generating a gap, when a hole for the power supply line to enter and exit or a knock-out hole capable of forming a hole is provided at a portion embedded in the side surface of the case, the hole or the knock-out hole becomes unusable.

Further, since the embedded portion is provided with a stepped portion formed in the middle of the housing, it is difficult to attach and detach the cover frame due to the stepped portion in a state where the housing is attached to the wall surface.

In view of the above, an object of the present invention is to provide a switchboard housing that can use a wire access portion provided on a housing side surface of an embedded specification even when the housing is provided to be exposed, and that can be easily attached to and detached from a cover frame covering the embedded portion of the housing.

Means for solving the problems

In order to solve the above-described problems, the invention according to claim 1 is a switchboard housing having a housing main body having a back plate and side plates surrounding four sides of the back plate, and having a front surface opened, and a front panel closing the front surface of the housing main body, the switchboard housing being capable of accommodating electric equipment therein, characterized in that the switchboard housing has a cover frame covering the entirety of the side plates, and on the other hand, at least one of the side plates is provided with a knock-out hole capable of forming a hole for an access of a power supply line, and a thinned portion which is easily formed as an opening portion is formed in a portion of the cover frame corresponding to the knock-out hole.

According to this configuration, even if the housing main body is covered with the cover frame, the thinned portion is provided in the cover frame so as to match the position of the knock-out hole of the housing main body, and therefore, even if the cover frame is attached, the electric wire can be moved in and out through the knock-out hole. Further, since the housing main body is covered with the cover frame, the housing main body is preferable in terms of appearance even if it is exposed from the wall surface.

The invention according to claim 2 is the structure according to claim 1, wherein the outer contour of the front panel is larger than the outer contour of the case main body, and the cover frame has a size matching the outer contour of the front panel, and the cover frame covering the side panels eliminates the step.

According to this configuration, since the outer contour of the front panel is larger than the outer contour of the case body, the gap between the case body and the wall surface can be closed by the assembled front panel without requiring any other closing member, as long as the cover frame is removed and the case body is buried in the wall surface.

Further, since the cover frame has a size matching the outer contour of the front panel, the cover frame can be attached and detached only by removing the front panel, and when the cover frame is used so as to expose the housing main body, the step between the front panel and the housing main body can be eliminated by attaching the cover frame, and the cover frame can be formed into a smooth shape, which is desirable in terms of appearance.

The invention according to claim 3 is the structure according to

claim

1 or 2, wherein the cover frame has a connecting portion connected to the front panel, and is disposed and fixed around the housing main body in a state of being connected to the front panel.

According to this configuration, the cover frame can be mounted by only the operation of mounting the cover frame to the front panel, and the cover frame can be mounted by a simple operation.

The invention according to claim 4 is the structure according to any one of claims 1 to 3, wherein the cover frame is formed of four members divided for each side panel of the housing main body.

According to this configuration, the cover frame that is removed can be divided into four pieces, and therefore, space can be saved during storage.

Effects of the invention

According to the present invention, even if the housing main body is covered with the cover frame, the thinned portion is provided in the cover frame so as to match the position of the knock-out hole of the housing main body, and therefore, even if the cover frame is attached, the electric wire can be moved in and out through the knock-out hole. Further, since the housing main body is covered with the cover frame, the housing main body is preferable in terms of appearance even if it is exposed from the wall surface.

Drawings

Fig. 1 is a perspective view showing an example of a switchboard housing according to the present invention.

Fig. 2 is an explanatory view illustrating the separation of the case main body.

Fig. 3 is an explanatory diagram showing a relationship between the front panel and the cover frame, and is an exploded perspective view from the rear.

Fig. 4 is a perspective view showing a step of attaching the cover frame to the front panel, in which fig. 4 (a) is a view showing attachment of the vertical split pieces, fig. 4 (b) is a view showing attachment of the horizontal split pieces, and fig. 4 (c) is a view showing a state in which the attachment is completed.

Fig. 5 is a perspective view of the switchboard housing with the cover frame removed.

Description of the reference numerals

1: a switchboard housing; 2: a housing body; 3: a front panel; 4: a cover frame; 4a: longitudinally dividing the sheet; 4b: a horizontal dividing piece; 21: a back plate; 22: a side panel; 24: a knock-out hole; 33: a groove; 41: an insertion piece (connecting portion); 42 (42 a, 42 b): an engagement portion; 43: a thinning portion; b: a step part.

Detailed Description

Hereinafter, embodiments embodying the present invention will be described in detail with reference to the accompanying drawings. Fig. 1 and 2 show an example of a switchboard housing according to the present invention, fig. 1 is a perspective view, and fig. 2 shows a state in which a switchboard housing main body is separated. The switchboard housing 1 includes: a box-shaped case body 2 having an opening on the front surface side; a front panel 3 closing the front surface of the housing main body 2; and a cover frame 4 covering the periphery of the housing main body 2.

The case body 2 is formed by bending a steel plate, and the case body 2 includes a back plate 21 and side panels 22 each including four surfaces, i.e., a left side surface 22a, a right side surface 22b, a top surface 22c, and a bottom surface 22d, which are covered around the back plate, and the case body 2 is formed so as to be firmly buried in a wall surface. The back plate 21 is provided with mounting fittings 21a for mounting electrical equipment such as a branch circuit breaker, and screw insertion holes (not shown) for mounting the housing main body 2 on or in the wall surface are provided at four corners of the back plate 21.

A plurality of knock-out holes 24 are formed in the top surface 22c and the bottom surface 22d of the side plate 22, and the knock-out holes 24 are used to form holes for the entry and exit of electric wires, not shown, and holes can be easily formed by punching as needed.

Further, a tongue piece 25 for attaching the front panel 3 is formed by bending the front surfaces of the left and

right side plates

22a, 22b inward, and a screw hole 25a for connecting the front panel 3 is formed in the tongue piece 25.

The front panel 3 and the cover frame 4 are made of synthetic resin, and the front panel 3 is formed with a window 35 in which an operation handle of a branch breaker or the like to be housed is exposed at a central opening, and a window plate 32 for closing the window 35 is openably and closably attached. Further, screw insertion holes 34 are provided in positions corresponding to the screw holes 25a of the case main body 2 on the left and right sides of the window 35 closed by the louver 32. Fig. 1 shows a state where the louver 32 is open, and fig. 2 shows a state where the louver 32 is closed.

Fig. 3 is an explanatory view of the front panel 3 and the cover frame 4, and is an exploded perspective view from the rear. As shown in fig. 3, the cover frame 4 is divided into four pieces for each side panel 22 of the housing main body 2. The constitution is as follows: having a connecting portion with the front panel 3, the cover frame 4 can also be mounted to the housing main body 2 by attaching the front panel 3 to the housing main body 2. The following will explain the present invention in detail.

The periphery of the front panel 3 is folded back to form a skirt 31 having the same thickness in the back direction. The skirt 31 is formed in a double structure, a slit-like groove 33 for assembling the cover frame 4 is formed in the middle thereof, and the groove 33 is provided around.

On the other hand, the cover frame 4 is divided into four parts corresponding to the respective surfaces of the side panels 22 of the case main body 2. The cover frame 4 is formed by two members, including two vertical dividing pieces 4a corresponding to the left and

right side surfaces

22a, 22b of the side plate 22 and two horizontal dividing pieces 4b corresponding to the

top surface

22c, 22d, wherein the vertical dividing pieces 4a arranged on the left and right sides use members of the same shape, and the horizontal dividing pieces 4b arranged on the upper and lower sides use members of the same shape.

Tongue-shaped insertion pieces 41 inserted into the grooves 33 are provided to protrude from the respective divided

pieces

4a, 4b, and the respective insertion pieces 41 are inserted into the grooves 33 to be coupled to the front panel 3.

The cover frame 4 is used when the housing body 2 is not embedded in the wall surface but exposed on the wall surface, and the cover frame 4 is removed when the housing body 2 is embedded, and the cover frame 4 is not used.

The vertical split pieces 4a and the horizontal split pieces 4b are formed with engaging portions 42 (42 a, 42 b) so that gaps are not formed between adjacent split pieces. The engaging portion 42a of the vertical dividing piece 4a is provided with a holding piece formed to be inserted by the engaging portion 42b of the horizontal dividing piece 4b to hold the engaging portion 42b, and the engaging portion 42b of the horizontal dividing piece 42b is provided with a band piece formed to be inserted in the holding piece.

Further, a thinned portion 43 is formed in a portion of the lateral divided piece 4b corresponding to the knock-out hole 24 formed in the case body 2 so as to match the position of the knock-out hole 24. By forming the thinned portion 43, a cutout (opening portion) communicating with the knock-out hole 24 is easily formed.

On the other hand, the front panel 3 is formed to have an outer contour larger than that of the case main body 2, and is formed to accommodate the case main body 2 inside the skirt 31. Fig. 5 is a perspective view of the switchboard housing with the cover frame 4 removed, and as shown in fig. 5, the front panel 3 is formed to be larger than the housing main body 2 by one turn, and a step portion B is formed around the front panel when the front panel is connected. By providing the stepped portion B in this way, when the case body 2 is buried in the wall surface, the gap between the wall surface and the surrounding surface can be hidden by the front panel 3.

Further, by attaching the front panel 3 to which the cover frame 4 is attached to the housing main body 2, the stepped portion B between the front panel 3 and the housing main body 2 can be hidden to form a uniform side surface without the stepped portion.

Fig. 4 is a perspective view of the cover frame 4 as viewed from the rear, showing a step of attaching the cover frame 4 to the front panel 3, where (a) in fig. 4 shows an explanatory view of attaching the vertical split pieces 4a, (b) in fig. 4 shows an explanatory view of attaching the horizontal split pieces 4b, and (c) in fig. 4 shows an explanatory view of a state of completed attachment. The following procedure is shown in fig. 4: first, the left and right vertical split pieces 4a are attached to the front panel 3, and then the horizontal split pieces 4b are attached. In this case, when the horizontal split piece 4b is attached, the engaging portion 42b of the horizontal split piece is inserted into the engaging portion 42a of the vertical split piece 4a and slid, so that it is coupled to the front panel 3. The insertion piece 41 is inserted into the groove 33 to connect the divided

pieces

4a and 4 b.

In this way, the overlapping portion is provided at the abutting portion between the divided

pieces

4a and 4b to form the engaging portion 42, thereby preventing occurrence of a gap, and the divided

pieces

4a and 4b are connected to each other to be integrated.

In addition, the mounting order may be reversed, and the lateral divided pieces 4b may be first mounted on the front panel 3, and then the vertical divided pieces 4a may be slid and coupled to the front panel 3 in a state where the engaging portions 42 are aligned with each other.

The cover frame 4 is disposed so as to cover the side panel 22 of the housing main body 2 by attaching the front panel 3, which is formed in a cover shape by attaching the cover frame 4, to the housing main body 2 so as to be inserted from the front. Then, by screw-fastening the front panel 3 with the screw insertion holes 34 provided on the left and right sides of the front panel 3, the cover frame 4 can be positioned and fixed while the front panel 3 is fixed to the housing main body 2.

In this way, even if the housing main body 2 is covered with the cover frame 4, the thinned portion 43 is provided in the cover frame 4 so as to match the position of the knock-out hole 24 of the housing main body 2, and therefore, even if the cover frame 4 is attached, the electric wire can be put in and out through the knock-out hole 24. Further, since the housing main body 2 is covered with the cover frame 4, the housing main body 2 is preferable in terms of appearance even if it is exposed from the wall surface.

Since the outer contour of the front panel 3 is larger than the outer contour of the case body 2, the gap between the case body 2 and the wall surface can be closed by the assembled front panel 3 without requiring any other closing member, as long as the cover frame 4 is removed and the case body 2 is buried in the wall surface.

Further, since the cover frame 4 has a size matching the outer contour of the front panel 3, the cover frame 4 can be attached and detached only by removing the front panel 3, and when the cover frame 4 is used so as to expose the housing main body 2, the stepped portion between the front panel 3 and the housing main body 2 can be eliminated by attaching the cover frame 4, and the cover frame can be formed into a smooth shape, which is ideal in appearance.

In addition, the cover frame 4 can be mounted by merely inserting the cover frame into the front panel 3, and the cover frame 4 can be mounted by a simple operation without screw fastening or the like, and the cover frame 4 can be divided into four plates, so that space can be saved during storage.

In the above embodiment, the knock-out holes 24 are provided on the top surface 22c and the bottom surface 22d of the case body 2, but may be provided on the side surfaces 22a and 22b, and in this case, thinned portions are formed in the corresponding vertical split pieces 4 a. The case body 2 is not limited to being made of metal, and may be made of synthetic resin.

Industrial applicability

The above-described embodiment has mainly described a switchboard housing a breaker for forming a branch circuit, but is also applicable to an information switchboard housing information equipment.

Claims

1. A panel board housing having a housing body having a back plate and side panels surrounding four sides of the back plate, and having a front surface open, and a front panel closing the front surface of the housing body, the panel board housing being capable of accommodating electric devices therein,

the electrical panel housing is characterized in that,

a cover frame for covering the whole of the side panels, on the other hand, at least one side panel is provided with a knock-out hole which can form a hole for the power supply line to go in and out,

a thinned portion of the cover frame, which is formed at a portion corresponding to the knock-out hole, is formed so as to be easily opened,

the cover frame has a connection portion connected to the front panel, and is disposed and fixed around the housing main body in a state of being connected to the front panel.

2. The panel housing of claim 1, wherein the panel housing comprises a plurality of panels,

the outer contour of the front panel is larger than the outer contour of the housing main body with a stepped portion therebetween, and on the other hand, the cover frame has a size conforming to the outer contour of the front panel,

the step is eliminated with the cover frame covering the side panels.

3. The panel housing according to claim 1 or 2, wherein,

the cover frame is formed to be divided for each side panel of the housing main body and is composed of four members.