Housing frame structure, electrical equipment storage facility

Abstract

To prevent the deterioration of the overall rigidity by suppressing the displacement of the fixed position between frames in a housing frame structure.SOLUTION: A housing frame structure 11 has a concave portion 23 formed in one frame, and a convex portion 33 (or convex portion 43) that fits into the concave portion 23 in the other frame. Then, one frame and the other frame are superimposed, and joined by a fastener 51 in a state in which the concave portion 23 and the convex portion 33 (or the convex portion 43) are fitted.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to a housing frame structure and an electrical equipment storage facility. [Background technology]

[0002] In the housings of switchboards and control panels, it is desirable to improve assembly by fastening the frames together with screws or rivets. For example, Cited Document 1 proposes a structure in which the frames are joined together after aligning the rivet holes. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-61981 Summary of the Invention [Problem to be solved by the invention]

[0004] If the rivet holes are not positioned properly, the fixing position will be misaligned, which may reduce the overall rigidity of the housing. An object of the present invention is to suppress misalignment of fixing positions between frames in a housing frame structure, and to prevent a decrease in overall rigidity. [Means for solving the problem]

[0005] In one aspect of the housing frame structure of the present invention, a recess is formed in one frame and a protrusion that fits into the recess is formed in the other frame, and the one frame and the other frame are overlapped and joined with fasteners while the recess and protrusion are fitted together. An electrical equipment storage facility according to another aspect of the present invention employs a housing frame structure, and stores electrical equipment therein. [Effects of the Invention]

[0006] According to the present invention, the frames can be positioned relative to each other by fitting the recessed portion and the protruding portion together, which prevents deviation of the fixing positions of the frames from occurring and prevents a decrease in the overall rigidity. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 2 is a diagram showing a housing frame structure. [Figure 2] FIG. 2 is a view showing one end side of the vertical frame. [Figure 3] FIG. 10 is a view showing one end side of the width frame. [Figure 4] FIG. 10 is a diagram showing one end side of the depth frame. [Figure 5] FIG. 10 is a diagram showing frames with one end abutted against each other. [Figure 6] FIG. 10 is a diagram showing joined frames. [Figure 7] FIG. DETAILED DESCRIPTION OF THE INVENTION

[0008] Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the drawings are schematic and may differ from the actual product. Furthermore, the following embodiments exemplify devices and methods for embodying the technical concept of the present invention, and are not intended to limit the configuration to those described below. In other words, the technical concept of the present invention can be modified in various ways within the technical scope described in the claims.

[0009] One embodiment "composition" In the following description, the three mutually orthogonal directions are referred to as the lengthwise direction, the widthwise direction, and the depthwise direction. The lengthwise direction is the vertical direction (up and down direction), and the widthwise direction and the depthwise direction are the two horizontal directions (lateral directions). FIG. 1 is a diagram showing the housing frame structure. The housing frame structure 11 is used in electrical equipment storage facilities that store various electrical equipment inside. For example, it is intended for electrical panels such as control panels, distribution boards, and switchboards, but it can also be applied to the outer boxes of cubicle-type high-voltage power receiving equipment.

[0010] The housing frame structure 11 includes vertical frames 12, width frames 13, and depth frames 14, which are combined to form a substantially rectangular parallelepiped. Specifically, the housing frame structure 11 includes four vertical frames 12 extending vertically, four width frames 13 extending widthwise, and four depth frames 14 extending depthwise. For convenience, the lengths of the frames are shown to be substantially equal, but in reality, they may differ. One end of the vertical frames 12, one end of the width frames 13, and one end of the depth frames 14 are all joined via fasteners such as rivets. The vertical frames 12, width frames 13, and depth frames 14 are formed, for example, by bending equal-leg angle steel having a substantially uniform thickness and an L-shaped cross section. The following explanation will be given using one corner indicated by A in the figure as an example, but the other corners have basically the same configuration except that their orientation is reversed up and down or left and right, so detailed explanation will be omitted. Furthermore, when referring to the inside or outside, it is assumed that both refer to the inside or outside of the housing frame structure 11.

[0011] FIG. 2 is a diagram showing one end side of the vertical frame. (a) in the figure shows the vertical frame 12 as viewed from the inside in the vertical direction, the outside in the width direction, and the outside in the depth direction. (b) in the figure shows the vertical frame 12 as viewed from the vertical direction. The vertical frame 12 includes a vertical plate portion 21 (first vertical plate portion) and a vertical plate portion 22 (second vertical plate portion). The vertical plate portion 21 is a plate portion extending in the vertical and width directions, and the surface of one end on the outer side in the depth direction serves as a vertical joint surface 21a (first vertical joint surface). A recess 23 that is recessed inward in the depth direction is formed in the center in the width direction of the vertical joint surface 21a. The recess 23 is formed by bead processing so that the surface on the outer side in the depth direction of the vertical plate portion 21 is recessed and the surface on the inner side in the depth direction is convex, and has a V-shaped cross section, forming a groove-like shape extending in the vertical direction.

[0012] A through hole 25 penetrating in the depth direction is formed in the vertical joint surface 21a at a position that is more inward in the width direction than the recess 23. The through hole 25 is a round hole, and two through holes 25 are formed side by side and spaced apart in the vertical direction. A bead portion 26 is formed over the entire vertical area of the vertical plate portion 21. The bead portion 26 is formed by bead processing such that the outer surface of the vertical plate portion 21 in the depth direction is concave and the inner surface in the depth direction is convex, and the cross section is V-shaped, forming a groove shape extending in the vertical direction. The recessed portion 23 is formed in the same cross section shape as the bead portion 26 and extends vertically continuous with the bead portion 26.

[0013] The vertical plate portion 22 is a plate portion that extends along the vertical and depth directions, and is formed by bending at a right angle from the outer end of the vertical plate portion 21 in the width direction toward the inside in the depth direction. The dimension of the vertical plate portion 22 in the depth direction is approximately equal to the dimension of the vertical plate portion 21 in the width direction. The outer surface of one end of the vertical plate portion 22 in the width direction serves as a vertical joint surface 22a (second vertical joint surface). A recess 23 that is recessed toward the inside in the width direction is formed in the center in the depth direction of the vertical joint surface 22a. The recess 23 is formed by bead processing so that the outer surface of the vertical plate portion 22 in the width direction is recessed and the inner surface in the width direction is convex, and has a V-shaped cross section, forming a groove-like shape that extends in the vertical direction.

[0014] A through hole 25 penetrating in the width direction is formed in the vertical joint surface 22a at a position that is deeper inside than the recess 23. The through hole 25 is a round hole, and two through holes 25 are formed side by side and spaced apart in the vertical direction. A bead portion 26 is formed over the entire vertical area of the vertical plate portion 22. The bead portion 26 is formed by bead processing in which the outer surface of the vertical plate portion 22 in the width direction is concave and the inner surface of the vertical plate portion 22 in the width direction is convex, and the cross section is V-shaped, forming a groove shape extending in the vertical direction. The recessed portion 23 is formed in the same cross section as the bead portion 26 and extends vertically continuous with the bead portion 26.

[0015] FIG. 3 is a view showing one end side of the width frame. (a) in the figure shows the width frame 13 as viewed from the inside in the vertical direction, the outside in the width direction, and the outside in the depth direction. (b) in the figure shows the width frame 13 as viewed from the inside in the vertical direction, (c) in the figure shows the width frame 13 as viewed from the outside in the depth direction, and (d) in the figure shows the width frame 13 as viewed from the outside in the width direction. The width frame 13 includes a width board portion 31 (first width board portion) and a width board portion 32 (second width board portion). The width plate portion 31 is a plate portion extending in the width direction and the vertical direction, and the surface of one end on the inner side in the depth direction forms the width joint surface 31a. A convex portion 33 is formed in the center of the width direction on the width joint surface 31a, which convexly faces inward in the depth direction and fits into the concave portion 23 of the vertical plate portion 21. The convex portion 33 is formed by bead processing so that the surface on the inner side in the depth direction of the width plate portion 31 is convex and the surface on the outer side in the depth direction is concave, and has a V-shaped cross section, forming a ridge-like shape extending in the vertical direction.

[0016] The width joint surface 31a has through holes 35 formed therethrough in the depth direction at positions that are more inward in the width direction than the protrusions 33. The through holes 35 are circular holes, and two of them are formed side by side and spaced apart in the vertical direction. The arrangement of the through holes 35 relative to the protrusions 33 is the same as the arrangement of the through holes 25 relative to the recesses 23 of the vertical plate portion 21. The width plate portion 32 is a plate portion that extends along the width and depth directions, and is formed by bending at a right angle from the outer end of the width plate portion 31 in the vertical direction toward the inside in the depth direction. The dimension of the width plate portion 32 in the depth direction is approximately equal to the dimension of the width plate portion 31 in the vertical direction. The width plate portion 32 has an oblique side 34 formed on one end side. The oblique side 34 extends at a 45-degree angle toward the outside in the depth direction as it moves toward the outside in the width direction.

[0017] FIG. 4 is a diagram showing one end side of the depth frame. (a) in the figure shows the depth frame 14 as viewed from the inside in the vertical direction, the outside in the width direction, and the outside in the depth direction. (b) in the figure shows the depth frame 14 as viewed from the inside in the vertical direction, (c) in the figure shows the depth frame 14 as viewed from the outside in the width direction, and (d) in the figure shows the depth frame 14 as viewed from the outside in the depth direction. The depth frame 14 includes a depth plate portion 41 (first depth plate portion) and a depth plate portion 42 (second depth plate portion). The depth plate portion 41 is a plate portion that extends in the depth direction and the vertical direction, and the surface of one end on the inner side in the width direction forms the depth joint surface 41a. A protrusion 43 that protrudes inward in the width direction is formed in the center of the depth direction on the depth joint surface 41a, and fits into the recess 23 of the vertical plate portion 22. The protrusion 43 is formed by bead processing so that the surface on the inner side in the width direction of the depth plate portion 41 is protruding and the surface on the outer side in the width direction is concave, and has a V-shaped cross section, forming a ridge-like shape that extends in the vertical direction.

[0018] The depth joint surface 41a has through holes 45 formed therethrough in the width direction at positions inside the protrusions 43 in the depth direction. The through holes 45 are circular holes, and two of them are formed side by side and spaced apart in the vertical direction. The arrangement of the through holes 45 relative to the protrusions 43 is the same as the arrangement of the through holes 25 relative to the recesses 23 of the vertical plate portion 22. The depth plate portion 42 is a plate portion that extends along the depth and width directions, and is formed by bending at a right angle from the outer vertical end of the depth plate portion 41 toward the inside in the width direction. The width dimension of the depth plate portion 42 is approximately equal to the vertical dimension of the depth plate portion 41. The depth plate portion 42 has an oblique side 44 formed on one end side. The oblique side 44 extends at a 45-degree angle toward the outside in the width direction as it moves toward the outside in the depth direction.

[0019] FIG. 5 shows the frames with one end abutted against each other. (a) in the figure shows each frame as viewed from the inside in the vertical direction, the outside in the width direction, and the outside in the depth direction. (b) in the figure shows each frame as viewed from the inside in the vertical direction, the inside in the width direction, and the inside in the depth direction. In this figure, one end of the vertical frame 12 is butted against one end of the width frame 13 and one end of the depth frame 14. Specifically, the width and depth directions are positioned by overlapping the vertical joint surface 21a of the vertical frame 12 with the width joint surface 31a of the width frame 13 and fitting the recess 23 of the vertical joint surface 21a with the protrusion 33 of the width joint surface 31a. Similarly, the depth and width directions are positioned by overlapping the vertical joint surface 22a of the vertical frame 12 with the depth joint surface 41a of the depth frame 14 and fitting the recess 23 of the vertical joint surface 22a with the protrusion 43 of the depth joint surface 41a. Furthermore, vertical positioning is achieved by abutting one end of the vertical frame 12 on the outer vertical side against the width plate portion 32 of the width frame 13 and the depth plate portion 42 of the depth frame 14. As a result, the through hole 35 of the width joint surface 31a coincides with the through hole 25 of the vertical joint surface 21a, and the through hole 45 of the depth joint surface 41a coincides with the through hole 25 of the vertical joint surface 22a. Note that the width plate portion 32 and the depth plate portion 42 do not interfere with each other, as the oblique side 34 of the width plate portion 32 and the oblique side 44 of the depth plate portion 42 simply face each other.

[0020] FIG. 6 shows the joined frames. Here, a cross section along the width direction and depth direction passing through the centers of through holes 25, 35, and 45 is shown as viewed from the inside in the vertical direction. The vertical frame 12 and the width frame 13 are joined by fasteners 51 inserted into through holes 25 and 35, and the vertical frame 12 and the depth frame 14 are joined by fasteners 51 inserted into through holes 25 and 45. The fasteners 51 are structural rivets that can achieve high shear, high tensile strength, and high pressure bonding, and are inserted into each through hole from the outside of the housing and caulked using a dedicated fastening tool to firmly adhere the frames together. FIG. 7 is a diagram showing the electrical equipment storage facility. The electrical equipment storage facility 15 is an electrical panel that employs a housing frame structure 11, and stores electrical equipment therein.

[0021] <<Action and Effect>> Next, the main effects of the embodiment will be described. In the housing frame structure 11, one frame is formed with a recess 23, and the other frame is formed with a protrusion 33 (or protrusion 43) that fits into the recess 23. Then, one frame and the other frame are overlapped and joined with fasteners 51 in a state where the recess 23 and the protrusion 33 (or the protrusion 43) are fitted together. By fitting the recess 23 and the protrusion 33 (or the protrusion 43) together in this manner, the frames can be positioned relative to each other. Therefore, misalignment of the fixed positions of the frames can be suppressed, and a decrease in overall rigidity can be prevented. Furthermore, since the frames can be easily positioned relative to each other, workability can be improved and the accuracy of the assembly process can be increased. Furthermore, since no additional members are required to join the frames together, an increase in the number of parts can be suppressed. Furthermore, by joining the frames using fasteners, the joining work can be easily performed without the need for skilled welding workers, and stable joint strength can be ensured.

[0022] The housing frame structure 11 has three different directions, the vertical direction, the width direction, and the depth direction, and includes a vertical frame 12 extending in the vertical direction, a width frame 13 extending in the width direction, and a depth frame 14 extending in the depth direction. The vertical frame 12 includes a vertical plate portion 21 having a vertical joint surface 21a at one end and a recessed portion 23 formed in the vertical joint surface 21a, and a vertical plate portion 22 having a vertical joint surface 22a at one end and a recessed portion 23 formed in the vertical joint surface 22a. The width frame 13 includes a width plate portion 31 having a width joint surface 31a at one end and a protruding portion 33 formed in the width joint surface 31a, and is joined to the vertical joint surface 21a by fasteners 51 with the width joint surface 31a overlapping the vertical joint surface 21a and the recessed portion 23 and the protruding portion 33 fitted together. The depth frame 14 has a depth board portion 41, one end of which serves as a depth joint surface 41a, with a protrusion 43 formed on the depth joint surface 41a, which is joined to the vertical joint surface 22a by fasteners 51 with the recess 23 and the protrusion 43 fitted together. In this way, when joining the width frame 13 and the depth frame 14 to the vertical frame 12, the frames can be positioned relative to each other, facilitating assembly.

[0023] The width frame 13 has a width plate portion 32 at one end thereof against which one end of the vertical plate portion 21 abuts, and the depth frame 14 has a depth plate portion 42 at one end thereof against which one end of the vertical plate portion 22 abuts. This allows the frames to be positioned relative to each other in the vertical direction. The vertical plate portions 21 and 22 each have a bead portion 26 extending in the vertical direction. This increases the bending rigidity of the vertical plate portions 21 and 22, improving their mechanical strength, and also reduces the plate thickness and weight accordingly. In addition, the recessed portion 23 is formed with the same cross-sectional shape as the bead portion 26 and extends vertically continuous with the bead portion 26. This allows both the bead portion 26 and the recessed portion 23 to be formed together by bead processing on the vertical plate portions 21 and 22.

[0024] The width plate portion 31 has a protrusion 33 extending in the vertical direction, and the depth plate portion 41 has a protrusion 43 extending in the vertical direction, and each is formed with a cross-sectional shape that fits into the bead portion 26. Therefore, by performing bead processing in the same way as the bead portion 26 and the recessed portion 23, the protrusions 33 and the protrusions 43 can be easily formed. The bead portion 26 has a concave surface on the outer side of the housing and a convex surface on the inner side of the housing, which prevents unnecessary protrusions from being formed on the outer side of the housing and suppresses an increase in the overall dimensions of the product. The vertical direction is the vertical direction. That is, the vertical frames 12 function as pillars and are particularly important structural members that support the weight of the width frames 13 and depth frames 14 on the ceiling side, the doors and exterior panels, the ceiling and floor, and the electrical equipment housed inside. Therefore, providing the vertical frames 12 with bead portions 26 to improve their mechanical strength is particularly effective.

[0025] The vertical frame 12, width frame 13, and depth frame 14 all have an L-shaped cross section. This simple cross-sectional shape makes them easy to process. Furthermore, each frame can be easily formed by simply bending ordinary angle iron. The cross-sectional shape of the recess 23, and the cross-sectional shape of the protrusion 33 and the protrusion 43 are V-shaped. As such, the cross-sectional shape is simple and easy to process. The electrical equipment storage facility 15 employs a housing frame structure 11, and stores electrical equipment inside. This prevents a decrease in overall rigidity, makes it possible to provide a product that is easy to assemble, and minimizes the number of parts.

[0026] Next, a comparative example will be described. First, as one comparative example, there is a structure that does not have recessed portions 23, protruding portions 33, and protruding portions 43, and when joining frames together, it is necessary to align through holes 25 with through holes 35 and through holes 25 with through holes 45. However, in the case of such a structure, since there is no positioning, the fixing positions of each frame may shift, which may reduce the overall rigidity of the housing and reduce the ease of assembly. Another comparative example is a structure in which a corner member is provided and three frames are welded to this corner member, but this structure requires skilled welders, which increases costs and the number of parts.

[0027] <<Variation>> In one embodiment, rivets are used as the fasteners 51, but the present invention is not limited to this and screws, bolts, and nuts may also be used. The point is that any fastener such as rivets, screws, bolts, and nuts can be used as long as it can improve workability without requiring a skilled worker as in welding. This allows a certain level of joining strength to be ensured with relatively simple work. Furthermore, it is easier to inspect the joint than with welding. Rivets, in particular, are highly reliable because they do not generally loosen.

[0028] In the embodiment, the vertical frame 12 has an L-shaped cross section, but the present invention is not limited to this. That is, the vertical frame 12 only needs to have a vertical plate portion 21 to which the width frame 13 is joined and a vertical plate portion 22 to which the depth frame 14 is joined. Therefore, the cross section may be U-shaped or C-shaped, or may be a cylindrical shape such as a closed triangle or square. In one embodiment, the cross-sectional shapes of the recessed portion 23, the protruding portion 33, and the protruding portion 43 are described as being V-shaped, but this is not limited to this, and the cross-sectional shapes may also be U-shaped so that they fit together.

[0029] In one embodiment, a configuration has been described in which the recesses 23 are formed in the vertical frame 12, the protrusions 33 are formed in the width frame 13, and the protrusions 43 are formed in the depth frame 14, but this is not limited to this, and the recesses and protrusions may be reversed. In other words, the protrusions may be formed in the vertical frame 12, and the recesses may be formed in the width frame 13 and the depth frame 14. In one embodiment, the recesses 23, the protrusions 33, and the protrusions 43 are formed by bead processing, so that one surface is convex and the other surface is concave, like an embossed surface, but the present invention is not limited to this. Depending on the thickness of the plate portion, the depth of the recesses, and the height of the protrusions, the uneven shape may be formed only on each joining surface by cutting or rolling.

[0030] In one embodiment, the recess 23 is a linear groove extending in the vertical direction, and the protrusions 33 and 43 are linear ridges extending in the vertical direction, but this is not limited thereto. That is, the recess and protrusion may be dot-shaped as long as they can position the frames relative to each other. If the recess and protrusion are shaped like polygons, for example, so that the relative angle between them can be controlled, they may be provided in only one location. However, if the recess and protrusion are shaped like circles, so that the relative angle between them cannot be controlled, they may be provided in multiple locations. Such recess and protrusions can control positioning not only in the width and depth directions but also in the vertical direction.

[0031] In the embodiment, a corner where three mutually orthogonal frames are joined has been described, but the present invention is not limited to this. The housing frame structure 11 can also be applied to a location where one end of one frame is joined to the middle position of the other frame, or a location where a brace is added to improve vibration resistance. In one embodiment, the bead portions 26 are formed only on the vertical plate portions 21 and 22, but this is not limited to this. That is, the bead portions 26 may be formed on the width plate portions 31 and 32, or on the depth plate portions 41 and 42. This increases the bending rigidity of the width frame 13 and the depth frame 14 as well, improving their mechanical strength.

[0032] Although the present invention has been described above with reference to a limited number of embodiments, the scope of the invention is not limited thereto, and modifications of the embodiments based on the above disclosure will be obvious to those skilled in the art. [Explanation of symbols]

[0033] 11...Housing frame structure, 12...Vertical frame, 13...Width frame, 14...Depth frame, 15...Electrical equipment storage facility, 21...Vertical plate portion, 21a...Vertical joint surface, 22...Vertical plate portion, 22a...Vertical joint surface, 23...Recess, 25...Through hole, 26...Bead portion, 31...Width plate portion, 31a...Width joint surface, 32...Width plate portion, 33...Convex portion, 34...Hypotent side, 35...Through hole, 41...Depth plate portion, 41a...Depth joint surface, 42...Depth plate portion, 43...Convex portion, 44...Hypotent side, 45...Through hole, 51...Fastener

Claims

1. The three mutually different directions are defined as a vertical direction, a width direction, and a depth direction, A vertical frame having an L-shaped cross section and extending in the vertical direction; a width frame having an L-shaped cross section and extending in the width direction; a depth frame having an L-shaped cross section and extending in a depth direction; The vertical frame is a first vertical plate portion having one end serving as a first vertical joint surface and having one of a recess and a protrusion formed on the first vertical joint surface; a second vertical plate portion having one end serving as a second vertical joint surface and having one of a recess and a protrusion formed on the second vertical joint surface; The width frame is a first width plate portion having one end serving as a width joint surface, the other of the recessed portion and the protruding portion formed on the width joint surface, the width joint surface being superimposed on the first vertical joint surface, and the recessed portion and the protruding portion being fitted together, and joined by a fastener; a second width plate portion on one end of which one end of the first vertical plate portion that serves as the first vertical joint surface abuts; The depth frame is A first depth plate portion having one end serving as a depth joint surface, the other of the recess and the protrusion formed on the depth joint surface, the depth joint surface being superimposed on the second vertical joint surface, and the recess and the protrusion being fitted together, and joined by a fastener; A housing frame structure comprising: a second depth plate portion at one end thereof, the second depth plate portion being the second vertical joint surface and abutting against one end of the second vertical plate portion.

2. The housing frame structure according to claim 1, characterized in that the first vertical plate portion and the second vertical plate portion each have a bead portion extending vertically, and one of the concave portion and the convex portion is formed with the same cross-sectional shape as the bead portion and extends vertically continuous with the bead portion.

3. The housing frame structure according to claim 2, characterized in that the other of the concave portion and the convex portion of the first width plate portion and the first depth plate portion is formed in a cross-sectional shape that extends vertically and fits into the bead portion.

4. 4. The housing frame structure according to claim 2, wherein the bead portion has a concave surface on the outer side of the housing and a convex surface on the inner side of the housing.

5. 5. The housing frame structure according to claim 2, wherein the longitudinal direction is a vertical direction.

6. 6. The housing frame structure according to claim 1, wherein the recess and the protrusion have a V-shaped or U-shaped cross section.

7. 7. An electrical equipment storage facility, comprising: a housing frame structure according to claim 1; and an electrical equipment stored therein.

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