Housing for electrical device and method for manufacturing the housing for electrical device

Abstract

To provide an electrical device case that has a good appearance and excellent appearance quality.SOLUTION: In an electrical device case that includes a rectangular parallelepiped main body having an opening in the front, and a lid that opens and closes the opening, and in which the lid is hinged to the main body, the lid includes a lid portion and a side portion made of a single metal plate, the lid portion is rectangular, and the side portion is formed by bending a peripheral portion of the lid portion, two adjacent sides of the lid portion formed on one side are configured to be flush with each other such that the end surfaces of a first side piece connected to the one side and a third side piece connected to the end of a second side piece connected to the other side are butted to each other using an intersection k1 of the two sides as a starting point, and an overlapping side piece connected to either side of the first side piece or the third side piece is bent and overlapped on the inner surface side of the butted portion of the end surfaces of the first side piece and the third side piece.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to an electrical equipment enclosure for housing electrical equipment such as a switchboard, a distribution board, and a control board, and to a method for manufacturing the electrical equipment enclosure. [Background technology]

[0002] 2. Description of the Related Art Conventionally, housings for housing electrical devices such as control panels are well known (see Patent Document 1).

[0003] The control panel housing described in Patent Document 1 comprises a housing body consisting of left and right side panels, a top panel, a bottom panel, and a back panel, and a lid member for opening and closing the front opening of the housing body, and the housing body is fastened with rivets by overlapping the flanges formed on the edges of each of the panels.

[0004] However, the control panel housing has a problem in that the plate thickness (end faces) of each plate end of the housing body and the cover member are exposed to the outside, resulting in a poor appearance. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2004-336946 A Summary of the Invention [Problem to be solved by the invention]

[0006] SUMMARY OF THE PRESENT DISCLOSURE An object of the present invention is to provide a housing for an electric device that looks good and has excellent appearance quality, and a method for manufacturing the housing for an electric device. [Means for solving the problem]

[0007] In order to achieve the above object, the present invention provides An electrical device housing comprising a rectangular parallelepiped main body having an opening on a front side, and a cover for opening and closing the opening, the cover being hinged to the main body, the lid body has a lid portion and a side portion made of a single metal plate, the lid portion is rectangular, and the side portion is formed by folding a peripheral portion of the lid portion, The side portion formed on one side of the two adjacent sides of the lid portion is configured to be flush by butting the end faces of a first side piece connected to the one side and a third side piece connected to an end portion of the one side of a second side piece connected to the other side, starting from an intersection (intersection) k1 of the two sides; The present invention is characterized in that an overlapping side piece connected to either side of the first side piece and the third side piece is folded and overlapped on the inner side of the butt joint between the end faces of the first side piece and the third side piece.

[0008] The present invention relates to It is preferable that the overlapping side piece connected to the tip side of the first side piece is folded and overlapped on the inner surface side of the butt joint between the end faces of the first side piece and the third side piece.

[0009] The present invention relates to The lid body further has a flange portion, and the flange portion is formed by bending a tip side portion of each of the side portions inward and approximately parallel to the lid portion, The first flange portion formed on one of the two adjacent sides of the lid portion is configured to be flush with the first flange piece connected to the tip side of the first side piece and the third flange piece connected to the third side piece by butting end faces of the first flange piece connected to the butted portion of the first side piece and the third side piece together, The first flange portion and the second flange portion formed on the other side are configured to be flush with each other by butting the end faces of the third flange piece and the second flange piece connected to the second side piece together at an intersection (intersection) k2 of two adjacent ridges formed at the tip ends of the side portion formed on the one side and the side portion formed on the other side, A flange piece for overlapping is provided on either side of the first flange piece or the third flange piece by folding and overlapping the inner surface of the butt joint between the end faces of the first flange piece and the third flange piece and the butt joint between the end faces of the third flange piece and the second flange piece, The overlapping side piece connected to the tip side of the overlapping flange piece is folded and overlapped on the inner side of the butted portion of the end faces of the first side piece and the third side piece. R .

[0010] The present invention relates to the overlapping flange piece connected to the tip side of the first flange piece is folded and overlapped on the inner surface side of the butt joint between the end faces of the first flange piece and the third flange piece and the butt joint between the end faces of the third flange piece and the second flange piece, It is preferable that the first flange portion and the second flange portion are fastened by a fastening means using an overlapping portion between the second flange piece and the overlapping flange piece as a fastening portion.

[0011] The present invention relates to It is preferable that the fastening means is a rivet, and the third flange piece is pressed against the overlapping flange piece by the head of the rivet.

[0012] In order to achieve the above object, the present invention provides a method for producing a liquid crystal display comprising: An electrical device housing comprising a rectangular parallelepiped main body having an opening on a front side, and a cover for opening and closing the opening, the cover being hinged to the main body, The main body includes a main body trunk portion having a rectangular cross section formed of a single metal plate, and a main body rear portion that closes a rear side of the main body trunk portion, The body has a front plate portion on the front side, side plate portions, and a rear flange plate portion, the front plate portion being rectangular with an opening in the center, the side plate portions being formed by bending peripheral portions of the front plate portion, and the rear flange plate portion being formed by bending rear portions of the side plate portions inwardly and substantially parallel to the front plate portion, The main body rear portion is fixed to the rear of the rear flange plate portion of the main body trunk portion, The side plate portion formed on one side of two adjacent sides of the front plate portion is configured to be flush with the first side plate piece connected to the one side and the third side plate piece connected to the end of the one side of the second side plate piece connected to the other side by butting the end faces of the first side plate piece and the third side plate piece together starting from the intersection (intersection) k3 of the two sides; The present invention is characterized in that an overlapping side panel piece, which is connected to either side of the first side panel piece and the third side panel piece, is folded and overlapped on the inner side of the butt joint between the end faces of the first side panel piece and the third side panel piece.

[0013] The present invention relates to The side plate portion formed on the one side is formed flush by bending inwardly a first side plate fastening piece connected to an end portion of the first side plate piece on the side of the third side plate piece and a second side plate fastening piece connected to an end portion of the third side plate piece on the side of the first side plate piece, respectively, continuously to the butt portions of the first side plate piece and the third side plate piece, and the first side plate fastening piece and the second side plate fastening piece are overlapped in a columnar shape on the inner surface side, the first side plate piece and the third side plate piece are fastened by a fastening means using an overlapping portion of the first side plate fastening piece and the second side plate fastening piece as a fastening portion; The overlapping side plate piece connected to the end portion of the second side plate fastening piece is folded and overlapped on the inner surface side of the butted portion of the first side plate piece and the third side plate piece. R .

[0014] The present invention relates to Preferably, the fastening means are rivets.

[0015] The present invention relates to It is preferable that the main body rear portion has a rear plate that constitutes the rear surface of the main body, and that operation information required for assembling the electrical device is displayed on an inner surface of the rear plate.

[0016] In order to achieve the above object, the present invention provides An electrical device housing comprising a rectangular parallelepiped main body having an opening on a front side, and a cover for opening and closing the opening, the cover being hinged to the main body, The main body includes a main body trunk portion having a rectangular cross section formed of a single metal plate, and a main body rear portion that closes a rear side of the main body trunk portion, The body has a front plate portion on the front side, side plate portions, and a rear flange plate portion, the front plate portion being rectangular with an opening in the center, the side plate portions being formed by bending peripheral portions of the front plate portion, and the rear flange plate portion being formed by bending rear portions of the side plate portions inwardly and substantially parallel to the front plate portion, The main body rear portion is fixed to the rear of the rear flange plate portion of the main body trunk portion, The side plate portion formed on one side of two adjacent sides of the front plate portion is configured to be flush with the first side plate piece connected to the one side and the third side plate piece connected to the end portion of the one side of the second side plate piece connected to the other side by butting end faces of the first side plate piece and the third side plate piece together starting from the intersection of the two sides; An overlapping side plate piece is provided on either side of the first side plate piece and the third side plate piece, and is folded and overlapped on the inner surface side of the butted portion of the end faces of the first side plate piece and the third side plate piece. A method for manufacturing a housing for an electrical device, comprising the steps of: A separation portion composed of a cutout portion and a joint portion is formed in advance in the metal plate constituting the body body, The metal plate is bent to form the side plate portion and the rear flange plate portion, and then the cut-off portion is removed to form the opening in the front plate portion.

[0017] In order to achieve the above object, the present invention provides a method for producing a liquid crystal display comprising: Claim 3 or 4 A method for manufacturing a housing for an electrical device according to the present invention, the main body rear portion has a rear plate that constitutes a rear surface of the main body, The device is characterized in that the rear part of the main body, with electrical equipment pre-assembled to the inner surface of the rear plate, is fixed to the rear of the rear flange plate portion of the main body trunk, which is formed by bending the metal plate.

[0018] In order to achieve the above object, the present invention provides a method for producing a liquid crystal display comprising: An electrical device housing comprising a rectangular parallelepiped main body having an opening on a front side, and a cover for opening and closing the opening, the cover being hinged to the main body, the main body has a back plate portion, a side plate portion, and a front flange plate portion each made of a single metal plate, the back plate portion being rectangular in shape, the side plate portion being formed by bending peripheral portions of the back plate portion, and the front flange plate portion being formed by bending tip portions of each of the side plate portions inwardly so as to be substantially parallel to the back plate portion, The side plate portion formed on one side of two adjacent sides of the back plate portion is configured to be flush by butting the end faces of a first side plate piece connected to the one side and a third side plate piece connected to the end of the one side of a second side plate piece connected to the other side, starting from an intersection (intersection) k4 of the two sides; The present invention is characterized in that an overlapping side panel piece that is connected to either side of the first side panel piece and the third side panel piece is folded and overlapped on the inner side of the butt joint between the end faces of the first side panel piece and the third side panel piece.

[0019] The present invention relates to The side plate portion formed on the one side is formed flush by bending inwardly a first side plate fastening piece connected to an end portion of the first side plate piece on the third side plate piece side and a second side plate fastening piece connected to an end portion of the third side plate piece on the first side plate piece side, respectively, continuously to the butt joint portion of the first side plate piece and the third side plate piece, and the first side plate fastening piece and the second side plate fastening piece are overlapped in a columnar shape on the inner surface side, the first side plate piece and the third side plate piece are fastened by a fastening means using an overlapping portion of the first side plate fastening piece and the second side plate fastening piece as a fastening portion; The overlapping side plate piece connected to the end portion of the second side plate fastening piece is folded and overlapped on the inner surface side of the butted portion of the first side plate piece and the third side plate piece. R . Effect of the Invention

[0020] In the electrical device housing of the present invention, the lid body has a lid portion and a side portion made of a single metal plate, the lid portion is rectangular, and the side portion is formed by folding the peripheral portion of the lid portion, and the side portion formed on one of two adjacent sides of the lid portion is configured to be flush with the first side piece connected to the one side and the third side piece connected to the end portion of the one side of the second side piece connected to the other side by butting their end faces together starting from the intersection (intersection) k1 of the two sides.Therefore, the thickness (end face) of the plate material end does not appear on the side of the lid body, resulting in a good appearance and excellent appearance quality.

[0021] Furthermore, in the electrical device housing of the present invention, an overlapping side piece connected to either side of the first side piece or the third side piece is folded and overlapped on the inner side of the butt joint between the end faces of the first side piece and the third side piece, so that the gap at the butt joint is sealed from the inside, improving airtightness.

[0022] Furthermore, in the electrical device housing of the present invention, the side portion formed on one side has a double-wall structure at least at the end portion on the other side, thereby improving strength, and the weight of the lid can be reduced by reducing the thickness of the metal plate.

[0023] In the electrical device housing of the present invention, the lid further has flange portions, and the flange portions are formed by folding inward tip portions of each of the side portions to be approximately parallel to the lid portion, and the first flange portion formed on one of the two adjacent sides of the lid portion is formed flush with the first flange piece connected to the tip side of the first side piece and the third flange piece connected to the third side piece by butting end faces of the first flange piece connected to the tip side of the first side piece and the third flange piece connected to the third side piece in a continuous manner to the butted portion of the first side piece and the third side piece, while the second flange portion formed on the first flange piece and the other side is formed flush with the third flange piece and the second flange piece connected to the second side piece by butting end faces of the third flange piece and the second flange piece connected to the second side piece at an intersection (intersection) k2 of two adjacent ridges formed on the tip sides of the side portion formed on the one side and the side portion formed on the other side. So Since the plate thickness (end face) of the plate material end portion is not visible on the flange portion of the lid, the appearance is good and the appearance quality is excellent.

[0024] In addition, in the electrical device housing of the present invention, an overlapping flange piece connected to either side of the first flange piece and the third flange piece is folded and overlapped on the inner side of the butt joint between the end faces of the first flange piece and the third flange piece and the butt joint between the end faces of the third flange piece and the second flange piece, and the overlapping side piece connected to the tip side of the overlapping flange piece is folded and overlapped on the inner side of the butt joint between the end faces of the first side piece and the third side piece. So The gaps in the butted portions are sealed from the inside, improving airtightness. Furthermore, in the electrical device housing of the present invention, the flange portion has a double-wall structure at least at the corner portion, and the side portion formed on one side has a double-wall structure at least at the end portion on the other side, thereby improving strength, and the weight of the lid can be reduced by reducing the thickness of the metal plate.

[0025] In the electrical device housing of the present invention, the overlapping flange piece connected to the tip side of the first flange piece is folded and overlapped on the inner side of the butt joint between the end faces of the first flange piece and the third flange piece and the butt joint between the end faces of the third flange piece and the second flange piece, and the first flange portion and the second flange portion are fastened by a fastening means with the overlapping portion of the second flange piece and the overlapping flange piece as the fastening portion, so that the fastening portion is located on the inner side of the cover body and the fastening means such as rivets are not exposed to the outside, resulting in a good appearance and excellent appearance quality.

[0026] In the electrical device housing of the present invention, if the fastening means is a rivet and the third flange piece is pressed against the overlapping flange piece by the head of the rivet, then it is possible to prevent the third flange piece 333 from floating up.

[0027] The electrical device housing of the present invention has a main body comprising a main body trunk portion having a rectangular cross section formed of a single metal plate, and a main body rear portion closing the rear side of the main body trunk portion, the main body trunk portion having a front plate portion on the front side, side plate portions and a rear flange plate portion, the front plate portion being rectangular with an opening in the center, the side plate portions being formed by bending peripheral portions of the front plate portion, the rear flange plate portion being formed by bending rear side portions of the side plate portions inwardly so as to be approximately parallel to the front plate portion, while the main body rear portion is formed by bending the front plate portion in a rectangular shape with an opening in the center, the side plate portions being formed by bending the rear flange ...wardly so as to be approximately parallel to the front plate portion, The side plate portion is fixed to the rear of the rear flange plate portion of the main body trunk, and is formed on one of two adjacent sides of the front plate portion by butting the end faces of a first side plate piece connected to the one side and a third side plate piece connected to the end of the one side of a second side plate piece connected to the other side, starting from the intersection (intersection) k3 of the two sides, so that the thickness (end face) of the plate end does not appear on the side plate portion of the main body trunk, resulting in a good appearance and excellent appearance quality.

[0028] In addition, in the electrical device housing of the present invention, an overlapping side panel piece connected to either side of the first side panel piece or the third side panel piece is folded and overlapped on the inner surface of the butt joint between the end faces of the first side panel piece and the third side panel piece, so that the gap at the butt joint is sealed from the inside, improving airtightness. Furthermore, in the electrical device housing of the present invention, the side panel portion formed on one side has a double-wall structure at least at the end portion on the other side, thereby improving strength, and the main body trunk portion can be made lighter by reducing the thickness of the metal plate.

[0029] Furthermore, in the electrical equipment housing of the present invention, the rear portion of the main body is fixed to the back of the rear flange plate portion of the main body trunk, so that the fixing portion is located on the back side of the main body and the fixing means is not visible from the outside, thereby improving the appearance.

[0030] In the electrical device casing of the present invention, the side panel portion formed on the one side is formed flush by bending inwardly a first side panel fastening piece connected to an end of the first side panel piece on the third side panel piece and a second side panel fastening piece connected to an end of the third side panel piece on the first side panel piece, respectively, continuously to the butt joint portions of the first side panel piece and the third side panel piece, the first side panel fastening piece and the second side panel fastening piece are overlapped in a columnar shape on the inner surface side, and the first side panel piece and the third side panel piece are fastened by a fastening means with the overlapping portion of the first side panel fastening piece and the second side panel fastening piece as a fastening portion. So The strength of the main body portion 21 against torsion is improved by the columnar fastening portion. Furthermore, the electrical device casing of the present invention has a good appearance and excellent appearance quality because the fastening parts are located on the inner surface of the main body trunk 21 and fastening means such as rivets are not exposed to the outside.

[0031] In the electrical equipment housing of the present invention, the rear portion of the main body has a rear panel that forms the rear of the main body, and the inner surface of the rear panel has work information required for assembling the electrical equipment printed thereon, so that the worker does not need to look at a drawing while assembling the electrical equipment, thereby improving workability.

[0032] In the manufacturing method for an electrical device housing of the present invention, a cut-off portion composed of a notch and a connecting portion is formed in advance in the metal plate constituting the main body body, and after the metal plate is bent to form the side plate portion and the rear flange plate portion, the cut-off portion is removed and the opening is formed in the front plate portion.This makes it easy to bend and shape the main body body, and also makes it easy to form the opening by manually removing the cut-off portion.

[0033] In the manufacturing method for an electrical device housing of the present invention, the rear portion of the main body has a rear plate that constitutes the rear of the main body, and the rear portion of the main body with the electrical device pre-assembled to the inner surface of the rear plate is fixed behind the rear side flange plate portion of the main body trunk portion formed by bending the metal plate. This eliminates the need for a middle plate to assemble the electrical device, simplifying the work process, and allows a larger number of electrical devices to be assembled because the surface of the rear plate can be utilized more widely than when the middle plate is attached inside the main body from the front opening.

[0034] The electrical device housing of the present invention has a main body having a back plate portion, side plate portions and a front flange plate portion which are made of a single metal plate, the back plate portion being rectangular in shape, the side plate portion being formed by folding the peripheral portion of the back plate portion, and the front flange plate portion being formed by folding the tip portions of each side plate portion inward to be approximately parallel to the back plate portion, and the side plate portion formed on one side of two adjacent sides of the back plate portion is formed flush with the first side plate piece connected to the one side and a third side plate piece connected to the end portion of the one side of a second side plate piece connected to the other side by butting their end faces together starting from the intersection (intersection) k4 of the two sides, so that the thickness (end faces) of the plate ends do not appear on the side plate portions of the main body, resulting in a good appearance and excellent appearance quality.

[0035] In addition, in the electrical device housing of the present invention, an overlapping side panel piece that is connected to either side of the first side panel piece or the third side panel piece is folded and overlapped on the inner surface of the butt joint between the end faces of the first side panel piece and the third side panel piece, so that the gap at the butt joint is sealed from the inside, improving airtightness. Furthermore, in the electrical device housing of the present invention, the side panel portion formed on one side has a double-wall structure at least at the end portion on the other side, thereby improving strength, and the main body can be made lighter by reducing the thickness of the metal plate.

[0036] In the electrical device casing of the present invention, the side panel portion formed on one side is formed flush by bending inwardly a first side panel fastening piece connected to an end portion of the first side panel piece on the third side panel piece and a second side panel fastening piece connected to an end portion of the third side panel piece on the first side panel piece, respectively, continuously to the butt joint portions of the first side panel piece and the third side panel piece, the first side panel fastening piece and the second side panel fastening piece are overlapped in a columnar shape on the inner surface side, and the first side panel piece and the third side panel piece are fastened by a fastening means with the overlapping portion of the first side panel fastening piece and the second side panel fastening piece as a fastening portion. So The columnar fastening portion improves the torsional strength of the main body. Furthermore, the electrical device casing of the present invention has a good appearance and excellent appearance quality because the fastening portions are located on the inner surface of the main body and fastening means such as rivets are not exposed to the outside. [Brief description of the drawings]

[0037] [Figure 1] 1 is an overall perspective view of a housing for an electrical device according to a first embodiment of the present invention. [Diagram 2] 2 is an explanatory diagram of the electrical device housing of FIG. 1 with a cover open; FIG. [Diagram 3] 2 is a development view of a cover of the electrical device housing of FIG. 1. [Figure 4] 4 is an explanatory diagram of a procedure for producing a lid by folding the development view of FIG. 3. FIG. [Diagram 5] 13 is an explanatory diagram of an overlapping portion at a corner of the lid body. FIG. [Figure 6] 2 is a development view of a main body part of the electrical device housing of FIG. 1. [Figure 7] 7 is an explanatory diagram of a procedure for producing a main body trunk portion by folding the development view of FIG. 6. FIG. [Figure 8] 4 is an explanatory diagram of an overlapping portion at a corner of a main body barrel. FIG. [Figure 9] 13 is an explanatory diagram of a fastening portion on the inner surface of the main body barrel. FIG. [Figure 10] FIG. 11 is an overall perspective view of an electrical device housing according to a second embodiment of the present invention. [Figure 11] 11 is an explanatory diagram of the electrical device housing of FIG. 10 with the cover open. FIG. [Figure 12] 11 is a development view of the main body of the electrical device housing of FIG. 10. [Figure 13] FIG. 4 is an explanatory diagram of a fastening portion on the inner surface of the main body. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0038] An embodiment of the present invention will be described with reference to the drawings. <Embodiment 1> Fig. 1 shows an overall perspective view of an electrical device housing in a first embodiment of the present invention. Fig. 2 shows an explanatory diagram of a state in which the cover of the electrical device housing in Fig. 1 is open. For convenience of explanation, the rear side of the housing is shown facing downward and the front side is shown facing upward. An electrical device housing 1 in a first embodiment of the present invention comprises a rectangular parallelepiped main body 2 having an opening on the front, and a cover 3 for opening and closing said opening. A handle 12 for opening and closing is provided on the surface of the lid body 3, the lid body 3 is hingedly connected to the main body 2 by a hinge 13, and the lid body 3 can be fixed to the main body 2 by a snap lock 14.

[0039] The main body 2 includes a main body trunk portion 21 having a rectangular cross section and formed of a single metal plate, and a main body rear portion 22 which is formed of another metal plate and closes the rear side of the main body trunk portion 21. The main body trunk portion 21 has a front plate portion 211 on the front side, a side plate portion 212, and a rear side flange plate portion 213, the front plate portion 211 is rectangular with an opening in the center and a gasket 15 is attached to the inner edge of the opening, the side plate portion 212 is formed by bending the peripheral portion of the front plate portion 211, and the rear side flange plate portion 213 is formed in a frame shape approximately parallel to the front plate portion 211 by bending the rear side portion of the side plate portion 212 inward. The main body rear portion 22 is fixed to the rear of the rear flange plate portion 213 of the main body trunk portion 21.

[0040] The lid body 3 has a lid portion 31 and a side portion 32 which are made of a single metal plate. The lid portion 31 is rectangular, and the side portion 32 is formed by bending the peripheral portion of the lid portion 31. The lid body 3 has a flange portion 33 , and the flange portion 33 is formed in a frame shape approximately parallel to the lid portion 31 by bending the tip side portion of each of the side portions 32 inward.

[0041] [Lid] FIG. 3 shows an exploded view of the cover of the electrical device housing of FIG. In an expanded view of the lid body 3, a first side piece 321 is connected to two opposing sides 311, 311 of the lid portion 31, a second side piece 322 is connected to the other two opposing sides 312, 312 of the lid portion 31, and a third side piece 323 is connected to both side ends of each second side piece 322.

[0042] Further, a first flange piece 331 is connected to each of the first side pieces 321, a second flange piece 332 is connected to each of the second side pieces 322, and a third flange piece 333 is connected to each of the third side pieces 323.

[0043] Further, a fourth flange piece 3312 is connected to each of the first flange pieces 331, and a fifth flange piece 3322 is connected to each of the second flange pieces 332. A fourth side piece 3212 is connected to each of the fourth flange pieces 3312 .

[0044] Here, in the developed view of the lid body 3, between each of the first side pieces 321 and each of the third side pieces 323, in order to form the first side portion 32A on the side of the two opposing sides 311, 311, a cut-out portion is provided at the corner portion (four corners) of the lid portion 31, starting from the intersection (point of intersection) of the two adjacent sides 311, 312, so that the end faces of the two adjacent sides abut against each other, and here a V-shaped cut-out portion 34 is formed.

[0045] Further, each of the fourth side pieces 3212 is formed so as to overlap with the inside of a portion where the end faces of each of the first side pieces 321 and each of the third side pieces 323 abut against each other.

[0046] The cover portion 31 is provided with a handle opening 35 for forming the handle 12.

[0047] Fig. 4 is an explanatory diagram of the procedure for producing a lid by bending the development diagram of Fig. 3. Here, the bending process at one corner is shown. Note that r1 to r8 in the diagram indicate bending lines. The cover 3 is bent and shaped by a bending device, for example, in the following manner. (Steps 1 and 2) On the other two opposing sides 312, 312 of the lid portion 31, the fifth flange piece 3322 is folded inward along the folding line r1 and folded onto the second flange piece 332. (Step 3) The second flange piece 332 is folded inward along the folding line r2, and the third flange piece 333 is folded inward along the folding line r3.

[0048] (Steps 4 and 5) On the two opposing sides 311, 311 of the lid portion 31, the fourth flange piece 3312 and the fourth side piece 3212 are folded inward along the folding line r4 and folded onto the first flange piece 331 and the first side piece 321. (Step 6) The first flange piece 331 and the fourth flange piece 3312 are folded inwardly along a folding line r5. (Step 7) The first side piece 321 is folded inward along a folding line r6, and the third side piece 323 is folded inward along a folding line r7.

[0049] (Step 8) On the side of the other two opposing sides 312, 312 of the lid portion 31, the second side piece 322 is folded inward along the folding line r8.

[0050] FIG. 5 is an explanatory diagram of the overlapping portion at the corner of the lid, showing the state before and after bending the second side piece in step 8 of FIG. As shown in Figure 5, the first side portion 32A formed on one side 311 of the two adjacent sides 311, 312 of the cover portion 31 is configured to be flush with the first side piece 321 connected to the one side 311 and the third side piece 323 connected to the side end portion of the second side piece 322 connected to the other side 312, with the end faces butting against each other starting from the intersection (point of intersection) k1 of the two sides 311, 312. Therefore, the cover 3 has a good appearance and excellent appearance quality since the plate thickness (end face) of the plate material end portion is not visible on each side portion 32.

[0051] In addition, the lid body 3 has the fourth side piece 3212 overlapped on the inner surface of the butt joint between the end faces of the first side piece 321 and the third side piece 323, thereby sealing the gap at the butt joint from the inside, improving airtightness. Furthermore, since the first side portion 32A formed on the side of the side 311 of the lid body 3 has a double-wall structure consisting of the first side piece 321 and the fourth side piece 3212, the strength of the lid body 3 is improved, and the weight can be reduced by reducing the thickness of the metal plate.

[0052] As shown in FIG. 5, the first flange portion 33A formed on the side of one of the two adjacent sides 311, 312 of the cover portion 31 is configured to be flush with the first flange piece 331 connected to the tip of the first side piece 321 and the third flange piece 333 connected to the third side piece 323 by butting and abutting their end faces continuously to the butt joint between the end faces of the first side piece 321 and the third side piece 323, while the second flange portion 33B formed on the side of the first flange portion 33A and the other side 312 is configured to be flush with the third flange piece 333 and the second flange piece 332 connected to the tip of the second side piece 322 by butting and abutting their end faces starting from the intersection (intersection) k2 of the two adjacent sides (two ridges) formed at both tip portions of the second side portion 32B formed on the side of the first side portion 32A and the other side 312. Therefore, the plate thickness (end face) of the plate material end portion on each of the flange portions 33 of the lid body 3 is not visible in the appearance, and therefore the lid body 3 has a good appearance and excellent appearance quality.

[0053] In addition, the cover body 3 overlaps the fourth flange piece 3312 on the inner side of the butt joint between the end faces of the first flange piece 331 and the third flange piece 333, and between the end faces of the third flange piece 333 and the second flange piece 332, thereby sealing the gaps at each butt joint from the inside, improving airtightness. Furthermore, since the first flange portion 33A of the cover body 3 has a double-wall structure consisting of the first flange piece 331 and the fourth flange piece 3312, and the second flange portion 33B has a double-wall structure consisting of the second flange piece 332 and the fifth flange piece 3322, the strength is improved, and the weight can be reduced by reducing the thickness of the metal plate.

[0054] 5, a first fastening hole 381 is formed in the fourth flange piece 3312, and a second fastening hole 382 is formed in the second flange piece 332, and the first flange portion 33A and the second flange portion 33B of the cover 3 can be fastened by fastening means such as rivets using an overlapping portion of the second flange piece 332 and the fourth flange piece 3312 as a fastening portion. At that time, the third flange piece 333 can be pressed and fixed to the fourth flange piece 3312 by the head of the fastening means. The first flange portion 33A and the second flange portion 33B of the lid body 3 are fastened by a fastening means such as rivets, with the overlapping portion of the second flange piece 332 and the fourth flange piece 3312 serving as the fastening portion. Since the fastening portion is located on the inner surface side of the lid body 3 and the fastening means such as rivets are not exposed to the outside, the lid body 3 looks good and has excellent appearance quality.

[0055] [Main unit] FIG. 6 shows an exploded view of the main body of the electrical device housing of FIG. In an expanded view of the main body trunk portion 21, a first side panel piece 2121 is connected to two opposing sides 2111, 2111 of the front panel portion 211, a second side panel piece 2122 is connected to the other two opposing sides 2112, 2112 of the front panel portion 211, and a third side panel piece 2123 is connected to both side ends of each second side panel piece 2122.

[0056] In addition, first side panel fastening pieces 2141 are connected to both side ends of each of the first side panel pieces 2121, and fold-in pieces 215 are connected to the side ends of each of the first side panel fastening pieces 2141. Furthermore, a second side panel fastening piece 2142 is connected to the side end of each third side panel piece 2123, a third side panel fastening piece 21422 is connected to the side end of each second side panel fastening piece 21422, and a fourth side panel piece 21232 is connected to the side end of each third side panel fastening piece 21422.

[0057] On the other hand, a first rear flange piece 2131 is connected to each of the first side plate pieces 2121, and a second rear flange piece 2132 is connected to each of the second side plate pieces 2122.

[0058] Here, in the expanded view of the main body trunk portion 21, between each of the first side panel pieces 2121 and each of the third side panel pieces 2123, in order to form the first side panel portion 212A on the side of the two opposing sides 2111, 2111, a cut-out portion is provided at the corner portion (four corners) of the front panel portion 211, starting from the intersection (point of intersection) of the adjacent two sides 2111, 2112, so that the end faces of the two adjacent sides abut against each other, and here a V-shaped cut-out portion 24 is formed.

[0059] Further, each of the fourth side plate pieces 21232 is formed so as to overlap the inside of a portion where the end faces of each of the first side plate pieces 2121 and each of the third side plate pieces 2123 abut against each other.

[0060] Fig. 7 is an explanatory diagram of the procedure for manufacturing the main body by bending the development diagram of Fig. 6. Here, the bending process at one corner is shown. Note that t1 to t9 in the diagram indicate bending lines. The body portion 21 is bent and shaped by a bending device, for example, in the following manner. (Step 1) On the sides of the two opposing sides 2111 of the main body portion 21, the first rear flange plate piece 2131 is folded inward along the folding lines t1. (Steps 2 and 3) The third side panel fastening piece 21422 and the fourth side panel piece 21232 are folded inward along the folding line t2 and folded onto the third side panel piece 2123 and the second side panel fastening piece 2142. (Step 4) The third side panel fastening piece 21422 and the second side panel fastening piece 2142 are folded inward along the folding line t3.

[0061] (Steps 5 and 6) The folding piece 215 is folded inward along the folding line t4 and folded onto the first side panel fastening piece 2141. (Step 7) The first side panel fastening piece 2141 is bent inwardly along the bending piece t5. (Step 8) The first side plate piece 2121 is bent inwardly along the bending line t6, and the third side plate piece 2123 is bent inwardly along the bending line t7. (Step 9) The second rear flange piece 2132 is folded inward along the folding line t8. (Step 10) The second side panel 2122 is folded inward along the folding line t9.

[0062] Fig. 8 is an explanatory diagram of the overlapping portion at the corner on the front plate side of the main body trunk, showing the state before and after bending the second side plate piece in step 10 of Fig. 7. Also, Fig. 9 is an explanatory diagram of the fastening portion on the inner surface of the main body trunk, showing a perspective view of the main body trunk with the front side facing upward on the left side and an enlarged view of part A on the right side. As shown in Figure 8, the first side panel portion 212A formed on the side of one of the two adjacent sides 2111, 2112 of the front panel portion 211 of the main body trunk portion 21 is configured to be flush with the first side panel piece 2121 connected to the one side 2111 and the third side panel piece 2123 connected to the side end portion of the second side panel piece 2122 connected to the other side 2112, with the end faces butting against each other starting from the intersection (point of intersection) k3 of the two sides 2111, 2112. Therefore, the body trunk portion 21 has a good appearance and excellent appearance quality since the plate thickness (end faces) of the plate material ends are not visible on the side plate portions 212.

[0063] In addition, the main body trunk 21 has a fourth side panel piece 21232 that is connected to the side end portion of the third side panel piece 2123 overlapped on the inner side of the butt joint between the end faces of the first side panel piece 2121 and the third side panel piece 2123, so that the gap at the butt joint is sealed from the inside, improving airtightness. Furthermore, since the first side plate portion 212A formed on the side of the one side 2111 of the main body trunk portion 21 has a double-wall structure at the end portion on the other side 2112 side, which improves the strength, the weight can be reduced by reducing the thickness of the metal plate.

[0064] 9, the main body trunk portion 21 has a double fastening piece formed by folding and overlapping the first side plate fastening piece 2141 connected to the side end of the first side plate piece 2121, the second side plate fastening piece 2142 connected to the side end of the third side plate piece 2123, and the third side plate fastening piece 21422 connected to the side end of the second side plate fastening piece 2142, on the inner surface side of the first side plate portion 212A, and overlapping them in a columnar shape. A first fastening hole 281 is formed in the first side plate fastening piece 2141, and a second fastening hole 282 is formed in the double fastening piece, and the first side plate piece 2121 and the third side plate piece 2123 are fastened to each other by fastening means such as rivets, with the columnar overlapping portion serving as a fastening portion. Therefore, the strength of the main body portion 21 against torsion is improved by the columnar fastening portion. Furthermore, the fastening portion of the main body barrel 21 is located on the inner surface side, and fastening means such as rivets are not exposed to the outside, so that the main body barrel 21 has a good appearance and excellent appearance quality.

[0065] Here, the main body rear portion 22 has the same structure as the cover 3, and can be formed by bending a single metal plate. The main body trunk portion 21 and the main body rear portion 22 can be fastened together by a fastening means such as a rivet, with the overlapping portion formed by overlapping the rear side flange plate portion 213 of the main body trunk portion 21 and the flange portion of the main body rear portion 22 serving as the fastening portion. The main body 2 has a good appearance and excellent appearance quality because the fastening portion between the rear side flange plate portion 213 of the main body trunk portion 21 and the flange portion of the main body rear portion 22 is located on the inner side and the fastening means is not exposed to the outside.

[0066] The main body rear portion 22 has a rear panel 221 that forms the rear surface of the housing 1, and when the expansion panel of the main body rear portion 22 is created by cutting out or the like, the inner surface of the rear panel 221 can be processed and displayed with work information required for assembling the electrical equipment, such as the installation position of the electrical equipment and the name of the electrical equipment. If the work information required for assembling the electric device on the back panel 221 is processed and displayed in advance, the worker does not need to perform the work of assembling the electric device while looking at a drawing, and workability is improved.

[0067] Furthermore, before the main body rear portion 22 is fixed to the rear flange plate portion 213 of the main body trunk portion 21, electrical equipment can be attached to the rear plate 221. If the electrical equipment is assembled on the inner surface of the rear panel 221 and then the main body rear portion 22 is fixed to the rear of the rear flange plate portion 213 of the main body trunk portion 21, a middle plate for assembling the electrical equipment is not required, simplifying the work process, and since the surface of the rear panel 221 can be utilized more widely than in the case where the middle plate is attached to the inside of the main body 2 from the opening on the front side, a large number of electrical equipment can be assembled.

[0068] Instead of forming an opening in the front panel portion 211 when creating the deployment plate, the main body trunk portion 21 can have a portion of the front panel portion 211 that is to be removed as an opening formed as a single piece by a cutout portion and a connecting portion so as to be detachable. A cut-off portion consisting of a notch and a connecting portion is formed in advance in approximately the center of the metal plate constituting the main body trunk portion 21, and after the metal plate is bent to form the side plate portion 212 and the rear flange plate portion 213, the cut-off portion is removed and the opening is formed in the front plate portion 211.This makes it easy to bend and shape the main body trunk portion 21, and also makes it easy to form the opening by manually removing the cut-off portion.

[0069] In the above embodiment of the present invention, the main body rear portion 22 has the same configuration as the cover body 3 and is formed by bending a single metal plate, but it can also be formed from a single rectangular metal plate. Even in this case, the fastening portion between the rear flange plate portion 213 of the main body trunk portion 21 and the main body rear portion 22 is located on the rear surface side, and the fastening means is not visible from the outside, improving the appearance of the main body 2.

[0070] <Embodiment 2> Fig. 10 shows an overall perspective view of an electrical device housing in embodiment 2 of the present invention. Fig. 11 shows an explanatory diagram of a state in which the cover of the electrical device housing in Fig. 10 is open. For convenience of explanation, the rear side of the housing is shown facing downward and the front side facing upward. An electrical device housing 5 in the second embodiment of the present invention comprises a rectangular parallelepiped main body 6 having an opening on the front, and a cover 7 for opening and closing the opening. A handle 52 for opening and closing is provided on the surface of the lid 7, the lid 7 is hinged to the main body 6 by a hinge 53, and the lid 7 can be fixed to the main body 6 by a snap lock 54.

[0071] The main body 6 has a back plate portion 61, a side plate portion 62, and a front flange plate portion 63, which are all made of a single metal plate, and the back plate portion 61 is rectangular in shape, the side plate portion 62 is formed by bending the peripheral portion of the back plate portion 61 inward, and the front flange plate portion 63 is formed in a frame shape approximately parallel to the back plate portion 61 by bending the tip portion of the side plate portion 62 inward. The main body 6 has an opening on the inside of the front flange plate portion 63, and a packing 55 is attached to the inner peripheral edge of the opening. The lid 7 is the same as in the first embodiment, and the description thereof will be omitted here.

[0072] Figure 12 shows a development view of the main body of the electrical device housing of Figure 10. Figure 13 is an explanatory diagram of a fastening portion on the inner surface of the main body, showing a perspective view of the main body on the left side and an enlarged view of part B on the right side. In the second embodiment of the present invention, the front side of the main body 6 in the main body barrel 21 in the first embodiment is the rear side, and the rear side is the front side. Therefore, the explanatory diagram shown in Fig. 13 corresponds to the explanatory diagram shown in Fig. 9 in the first embodiment, with the front side and rear side reversed.

[0073] As shown in Figure 12, in the expanded view of the main body 6, a first side panel piece 621 is connected to two opposing sides 611, 611 of the back panel portion 61, a second side panel piece 622 is connected to the other two opposing sides 612, 612 of the back panel portion 61, and a third side panel piece 623 is connected to both side ends of each second side panel piece 622.

[0074] Further, first side panel fastening pieces 641 are connected to both side ends of each of the first side panel pieces 621, and fold-in pieces 65 are connected to the side ends of each of the first side panel fastening pieces 641. Furthermore, a second side panel fastening piece 642 is connected to the side end of each third side panel piece 623, a third side panel fastening piece 6422 is connected to the side end of each second side panel fastening piece 642, and a fourth side panel piece 6232 is connected to the side end of each third side panel fastening piece 6422.

[0075] On the other hand, a first front flange plate piece 631 is connected to each of the first side plate pieces 621, and a second front flange plate piece 632 is connected to each of the second side plate pieces 622.

[0076] Here, in the expanded view of the main body 6, between each of the first side panel pieces 621 and each of the third side panel pieces 623, in order to form the first side panel portion 62A on the side of the two opposing sides 611, 611, a cut-out portion is provided at the corner portion (four corners) of the back panel portion 61, starting from the intersection (point of intersection) of the adjacent two sides 611, 612, in a shape such that the end faces of the two panels abut against each other, and here a V-shaped cut-out portion 66 is formed.

[0077] Further, each of the fourth side plate pieces 6232 is formed so as to overlap with the inside of a portion where the end faces of each of the first side plate pieces 621 and each of the third side plate pieces 623 abut against each other.

[0078] As shown in FIG. 12, the development of the main body 6 has a configuration almost similar to that of the development of the main body trunk 21 shown in FIG. 6 in the first embodiment, and the procedure for producing the main body by folding the development shown in FIG. 12 is also similar to that for producing the main body trunk shown in FIG. 7 in the first embodiment, so a description thereof will be omitted here.

[0079] In embodiment 2 of the present invention, the main body 6, like the main body trunk portion 21 of embodiment 1, is configured so that a first side panel portion 62A formed on one side 611 of two adjacent sides 611, 612 of the back portion 61 is flush with the first side panel piece 621 connected to the one side 611 and a third side panel piece 623 connected to the side end portion of the second side panel piece 622 connected to the other side 612, with the end faces of the first side panel piece 621 butting against each other starting from the intersection (point of intersection) k4 of the two sides 611, 612. Therefore, the main body 6 has a good appearance and excellent appearance quality since the plate thickness (end face) of the plate material end portion on each side plate portion 62 is not visible in the appearance.

[0080] Furthermore, similar to the main body trunk portion 21 of embodiment 1, the main body 6 has a fourth side panel piece 6232 connected to the side end portion of the third side panel piece 623 overlapped on the inner surface of the butt joint between the end faces of the first side panel piece 621 and the third side panel piece 623, so that the gap at the butt joint is sealed from the inside, improving airtightness. Furthermore, similar to the main body trunk portion 21 of embodiment 1, the first side plate portion 62A formed on the one side 611 has a double-wall structure at the end portion on the other side 612, thereby improving strength, and therefore the weight can be reduced by reducing the thickness of the metal plate.

[0081] 13, in the main body 6, similarly to the main body trunk portion 21 of the first embodiment, a double fastening piece formed by folding and overlapping the first side plate fastening piece 641 connected to the side end of the first side plate piece 621, the second side plate fastening piece 642 connected to the side end of the third side plate piece 623, and the third side plate fastening piece 6422 connected to the side end of the second side plate fastening piece 642 is overlapped in a columnar shape on the inner surface side of the first side plate portion 62A. A first fastening hole is formed in the first side plate fastening piece 641, and a second fastening hole is formed in the double fastening piece, and the first side plate piece 621 and the third side plate piece 623 are fastened to each other by fastening means such as rivets with the columnar overlapping portion as a fastening portion. Therefore, the columnar fastening portion improves the strength of the main body 6 against torsion. Furthermore, the main body 6 has a good appearance and excellent appearance quality since the fastening portions are located on the inner surface side and fastening means such as rivets are not exposed to the outside.

[0082] Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and the configuration can be appropriately modified without departing from the scope of the invention. [Industrial Applicability]

[0083] The electrical device housing of the present invention has a good appearance and is excellent in appearance quality, and is extremely useful. [Explanation of symbols]

[0084] 1. Electrical equipment enclosures 2 Main unit 21 Main body 211 Front plate part 212 Side plate part 212A 1st side plate part 212B 2nd side plate part 2121 1st side plate piece 2122 2nd side plate piece 2123 Third side plate piece 21232 4th side plate piece (side plate piece for polymerization) 213 Rear flange plate 2131 1st rear flange plate 2132 Second rear flange plate 2141 First side plate fastening piece 2142 Second side plate fastening piece 21422 Third side plate fastening piece 215 Folding piece 22 Rear part of main unit 221 Back plate 24 Notch 281 1st fastening hole 282 2nd fastening hole 3 Lid 31 Lid 32 Side 32A First Side 32B Second side 321 First side 322 Second side 323 Third side 3212 4th side piece (side piece for polymerization) 33 Flange section 33A First flange part 33B Second flange part 331 First flange piece 332 Second flange piece 333 Third flange piece 3312 4th flange piece (flange piece for polymerization) 3322 Fifth flange piece 34 Notch 381 1st fastening hole 382 2nd fastening hole 5. Electrical equipment enclosures 6 Main unit 61 Back plate part 62 Side plate part 62A 1st side plate part 62B 2nd side plate part 621 1st side plate piece 622 2nd side plate piece 623 Third side plate piece 6232 4th side plate piece (side plate piece for polymerization) 63 Front flange plate 631 First front flange plate 632 Second front flange plate 641 First side plate fastening piece 642 Second side plate fastening piece 6422 Third side plate fastening piece 65 Folding piece 66 Notch 7 Lid k1~k4 intersection r1~r8 bending lines t1~t9 Bending lines

Claims

1. An electrical device housing comprising a rectangular parallelepiped main body having an opening on a front side, and a cover for opening and closing the opening, the cover being hinged to the main body, The lid body has a lid portion and a side portion formed of a single metal plate, The lid portion is rectangular, The side portion is formed by folding a peripheral portion of the lid portion, A side portion formed on one side of two adjacent sides of the lid portion is formed flush by butting end faces of a first side piece connected to the one side and a third side piece connected to an end portion of the one side of a second side piece connected to the other side, starting from an intersection of the two sides; An overlapping side piece connected to either side of the first side piece or the third side piece is folded and overlapped on the inner surface side of the butted portion of the end faces of the first side piece and the third side piece, The lid further has a flange portion, The flange portion is formed by bending a tip end portion of each of the side portions inwardly and substantially parallel to the lid portion, The first flange portion formed on one of the two adjacent sides of the lid portion is configured to be flush with the first flange piece connected to the tip side of the first side piece and the third flange piece connected to the third side piece by butting end faces of the first flange piece connected to the butted portion of the first side piece and the third side piece together. The first flange portion and the second flange portion formed on the other side are configured to be flush with each other by butting end faces of the third flange piece and the second flange piece connected to the second side piece together starting from an intersection of two adjacent ridges formed at the tip ends of the side portion formed on the one side and the side portion formed on the other side, an overlapping flange piece provided adjacent to either side of the first flange piece or the third flange piece is folded and overlapped on an inner surface side of an abutting portion between end faces of the first flange piece and the third flange piece and an abutting portion between end faces of the third flange piece and the second flange piece; A housing for electrical equipment, characterized in that the overlapping side piece connected to the tip side of the overlapping flange piece is folded and overlapped on the inner side of the butt joint between the end faces of the first side piece and the third side piece.

2. The polymerization flange piece connected to the tip side of the first flange piece is folded and polymerized on the inner surface side of the butt joint between the end faces of the first flange piece and the third flange piece and the butt joint between the end faces of the third flange piece and the second flange piece, 2. The electrical device housing according to claim 1, wherein the first flange portion and the second flange portion are fastened to each other by fastening means using an overlapping portion between the second flange piece and the overlapping flange piece as a fastening portion.

3. An electrical device housing comprising a rectangular parallelepiped main body having an opening on the front and a lid for opening and closing said opening, said lid being hinged to said main body, The main body includes a main body trunk portion having a rectangular cross section formed of a single metal plate, and a main body rear portion that closes a rear side of the main body trunk portion, The body has a front plate portion on the front side, side plate portions, and a rear flange plate portion, the front plate portion being rectangular with an opening in the center, the side plate portions being formed by bending peripheral portions of the front plate portion, and the rear flange plate portion being formed by bending rear portions of the side plate portions inwardly and substantially parallel to the front plate portion, The main body rear portion is fixed to the rear of the rear flange plate portion of the main body trunk portion, and the side plate portion formed on one of two adjacent sides of the front plate portion is configured to be flush with the first side plate piece connected to the one side and a third side plate piece connected to the end portion of the one side of the second side plate piece connected to the other side by butting end faces of the first side plate piece and a third side plate piece connected to the end portion of the one side of the second side plate piece, the third side plate piece being connected to the end portion of the one side of the second side plate piece being connected to the other side, An overlapping side plate piece is provided on either side of the first side plate piece and the third side plate piece, and is folded and overlapped on the inner surface side of the butted portion of the end faces of the first side plate piece and the third side plate piece, moreover, the side plate portion formed on the one side is formed flush by bending inwardly a first side plate fastening piece connected to an end portion of the first side plate piece on the third side plate piece side and a second side plate fastening piece connected to an end portion of the third side plate piece on the first side plate piece side, respectively, continuously to the butt joint portion of the first side plate piece and the third side plate piece, and the first side plate fastening piece and the second side plate fastening piece are overlapped in a columnar shape on the inner surface side, the first side plate piece and the third side plate piece are fastened by a fastening means using an overlapping portion of the first side plate fastening piece and the second side plate fastening piece as a fastening portion; A housing for electrical equipment, characterized in that the overlapping side panel piece, which is connected to the end side of the second side panel fastening piece, is folded and overlapped on the inner side of the butt joint portion of the first side panel piece and the third side panel piece.

4. The main body rear portion has a rear plate that constitutes the rear surface of the main body, 4. The electrical device housing according to claim 3, wherein operation information required for assembling the electrical device is marked on the inner surface of the rear panel.

5. An electrical device housing comprising a rectangular parallelepiped main body having an opening on the front and a lid for opening and closing said opening, said lid being hinged to said main body, The main body includes a main body trunk portion having a rectangular cross section formed of a single metal plate, and a main body rear portion that closes a rear side of the main body trunk portion, The body has a front plate portion on the front side, side plate portions, and a rear flange plate portion, the front plate portion being rectangular with an opening in the center, the side plate portions being formed by bending peripheral portions of the front plate portion, and the rear flange plate portion being formed by bending rear portions of the side plate portions inwardly and substantially parallel to the front plate portion, The main body rear portion is fixed to the rear of the rear flange plate portion of the main body trunk portion, The side plate portion formed on one side of two adjacent sides of the front plate portion is configured to be flush with the first side plate piece connected to the one side and the third side plate piece connected to the end portion of the one side of the second side plate piece connected to the other side by butting end faces of the first side plate piece and the third side plate piece together starting from the intersection of the two sides, an overlapping side plate piece connected to either side of the first side plate piece and the third side plate piece is folded and overlapped on an inner surface side of a butted portion of an end face of the first side plate piece and the third side plate piece, The metal plate constituting the main body includes: A manufacturing method for a housing for electrical equipment, characterized in that a separation portion consisting of a cutout portion and a connecting portion is formed in advance, and after the metal plate is bent to form the side plate portion and the rear flange plate portion, the separation portion is removed and the opening is formed in the front plate portion.

6. A method for manufacturing a housing for electrical equipment according to claim 3 or claim 4, comprising the steps of: The method for manufacturing a housing for electrical equipment is characterized in that the rear portion of the main body has a rear plate that constitutes the rear portion of the main body, and the rear portion of the main body, with electrical equipment pre-assembled to the inner surface of the rear plate, is fixed to the back of the rear side flange plate portion of the main body trunk portion formed by bending the metal plate.

7. An electrical device housing comprising a rectangular parallelepiped main body having an opening on the front and a lid for opening and closing said opening, said lid being hinged to said main body, The main body has a back plate portion, a side plate portion, and a front flange plate portion, which are each made of a single metal plate, The back plate portion is rectangular, The side plate portion is formed by bending a peripheral portion of the back plate portion, The front flange plate portion is formed by bending tip portions of the side plates inwardly and substantially parallel to the back plate portion, The side plate portion formed on one side of two adjacent sides of the back plate portion is configured to be flush with the first side plate piece connected to the one side and the third side plate piece connected to the end portion of the one side of the second side plate piece connected to the other side by butting end faces of the first side plate piece and the third side plate piece together starting from the intersection of the two sides, An overlapping side plate piece is bent and overlapped on an inner surface side of a butted portion between end faces of the first side plate piece and the third side plate piece, the overlapping side plate piece being connected to either side of the first side plate piece and the third side plate piece, The side plate portion formed on the one side is formed flush by bending inwardly a first side plate fastening piece connected to an end portion of the first side plate piece on the third side plate piece side and a second side plate fastening piece connected to an end portion of the third side plate piece on the first side plate piece side, respectively, continuously to the butt joint portion of the first side plate piece and the third side plate piece, and the first side plate fastening piece and the second side plate fastening piece are overlapped in a columnar shape on the inner surface side, the first side plate piece and the third side plate piece are fastened by a fastening means using an overlapping portion of the first side plate fastening piece and the second side plate fastening piece as a fastening portion; A housing for electrical equipment, characterized in that the overlapping side panel piece, which is connected to the end side of the second side panel fastening piece, is folded and overlapped on the inner side of the butt joint portion of the first side panel piece and the third side panel piece.

Images