Frame and frame metal fitting

Abstract

To provide a frame and a frame metal fitting that make construction of the frame be easy and make manufacturing of members configuring the frame be easy.SOLUTION: A frame comprises: a body member 11 including a first fixation part 12, a second fixation part 13 orthogonal to the first fixation part 12, and a coupling part 15 provided between the first fixation part 12 and the second fixation part 13; and a coupling member 16 that is coupled to the coupling part 15 of the body member 11 and forms a third fixation part whose axial direction is orthogonal to an axial direction of the first fixation part 12 and an axial direction of the second fixation part 13. The coupling part 15 of the body member 11 includes: a first coupling wall Rf1 that is coupled to the first fixation part 12 and is parallel with the axial direction of the first fixation part 12; and a second coupling wall Rf2 that is coupled to the second fixation part 13 and is parallel with the axial direction of the second fixation part 13. The coupling member 16 connects the first coupling wall Rf1 and the second coupling wall Rf2 of the coupling part 15 of the body member 11 so as to maintain a state in which the axial direction of the first fixation part 12 is orthogonal to the axial direction of the second fixation part 13.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a frame and a frame metal fitting, and more particularly to a frame used to form a housing for accommodating a switchboard and a frame metal fitting used to form such a frame, and a frame metal fitting used to form a platform door installed on a platform of a railway station. [Background technology]

[0002] A distribution board for electrical equipment, etc. is installed inside a housing and isolated from the outside. The housing for a distribution board needs to be highly dustproof, weatherproof, and strong, and also needs to have high dimensional accuracy, so it is formed by fixing a metal plate to a metal frame. In a typical distribution board housing, the metal frame is formed by welding L-shaped angle iron, etc., and in order to achieve high dimensional accuracy with this method, it is necessary for a skilled worker to manufacture it, and there is a problem that it is very time-consuming and requires a lot of work.

[0003] Therefore, a method of forming a switchboard by assembling components that have been formed in advance to a predetermined size and shape has been developed as a method of relatively easily and accurately manufacturing a housing for use in a switchboard. For example, Patent Documents 1 and 2 disclose a technology for forming a frame using a corner component having three orthogonal connecting parts and a hollow tubular component that is inserted into and fixed to the three connecting parts of the corner component. However, the corner components used in Patent Documents 1 and 2 have very complicated shapes, and while this can reduce the effort required for forming the frame somewhat, there is a problem in that it takes a lot of effort to manufacture the corner fittings themselves.

[0004] Patent Document 3 discloses a technique for forming a corner component by combining multiple components. With the technique of Patent Document 3, the corner component is formed by combining four components formed by bending plate material, so compared to the techniques of Patent Documents 1 and 2, the corner fitting itself is easier to manufacture. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 11-251762 [Patent Document 2] Patent No. 2866619 [Patent Document 3] Patent No. 5647173 Summary of the Invention [Problem to be solved by the invention]

[0006] The corner member disclosed in Patent Document 3 is formed by connecting a protrusion formed on each member to a notch or through hole formed on each member, but is configured to connect one member to multiple other members. Therefore, unless the machining precision of all of the notches, through holes, and protrusions formed on the four members is high, it may not be possible to properly connect and assemble the corner member. In other words, if the machining precision of even one of the four members is poor, it may not be possible to properly connect the four members and assemble the corner member.

[0007] Platform doors (movable platform fences) that automatically open and close when a train enters the station are sometimes installed on platforms at railway stations to prevent passengers and baggage from falling onto the tracks. The frame of this platform door is formed by fixing a metal plate to a metal frame, similar to the housing of the switchboard described above, but in order to achieve high dimensional accuracy with this method, it has to be manufactured by a skilled worker, and there are similar problems in that it requires a large number of labor-hours and is very time-consuming. However, no practical frame hardware that facilitates the assembly of the platform door frame and is easy to manufacture has been proposed to date.

[0008] In view of the above circumstances, an object of the present invention is to provide a frame and frame fitting which are easy to assemble and which allows easy manufacture of the members that constitute the frame. [Means for solving the problem]

[0009] The frame according to the present invention and the frame fitting according to the present invention will be described below, but for the sake of convenience, the terms "embodiment" and "example" will be used in this specification in the following organized form.

[0010] First, as a first embodiment of a frame according to the present invention, a basic form of a frame used to form a housing for accommodating a switchboard will be described with reference to Figs. 1 to 7. Hereinafter, this frame may be referred to as "the frame of this embodiment" or "the frame of the first embodiment." Frame 1, which will be described later, corresponds to this frame. Next, as a modification of the first embodiment of the frame according to the present invention, another form of a frame used to form a housing for accommodating a switchboard will be described with reference to Figs. 8 to 16. This frame may be hereinafter referred to as "a frame of another embodiment" or "a frame of a second embodiment." Frame 1B, which will be described later, corresponds to this form. Next, as yet another embodiment of the frame according to the present invention, a frame for a platform screen door installed on a platform of a railway station will be described with reference to Figs. 17 to 25. This frame may be hereinafter referred to as a "frame of a third embodiment." Frame 1C, which will be described later, corresponds to this frame.

[0011] The configuration of each frame fitting will be described appropriately in accordance with the description of each embodiment above. First, as a first embodiment of the frame metal fitting according to the present invention, a frame metal fitting that can be used for a frame used to form a housing for accommodating a switchboard will be described. This frame metal fitting may be referred to as the "frame metal fitting of the first embodiment." A corner member 10, which will be described later, corresponds to this. The corner member 10, which will be described as the frame metal fitting of the first embodiment, can be used for both the frame of the first embodiment and the frame of the second embodiment. Next, as a second embodiment of the frame hardware according to the present invention, a frame hardware used in the frame of the second embodiment and having a different shape from the frame hardware of the first embodiment will be described. This frame hardware may be referred to as the "frame hardware of the second embodiment." The relay hardware 30 described below corresponds to this. The relay hardware 30 described as the frame hardware of the second embodiment is used in the frame of the second embodiment. Next, as third to sixth embodiments of the frame metal fittings according to the present invention, frame metal fittings that can be used for the frames of platform doors installed on railway station platforms will be described. These frame metal fittings will be referred to as the "frame metal fittings of the third embodiment," the "frame metal fittings of the fourth embodiment," the "frame metal fittings of the fifth embodiment," and the "frame metal fittings of the sixth embodiment," respectively. These correspond to the joint members 50, 60, 70, and 80 described below. The joint members 50, 60, 70, and 80 described as the frame metal fittings of the third to sixth embodiments are used in the frame of the third embodiment.

[0012] Furthermore, when the term "frame metal fitting of the present invention" is used, it includes all of the frame metal fittings of the first to sixth examples, but is not limited to these. Furthermore, when the term "frame of the present invention" is used, it includes all of the frames of the first to third embodiments, but is not limited to these.

[0013] Next, the means for solving the problems of the present invention will be described.

[0014] <Frame fittings> The frame metal fitting of the present invention is a frame metal fitting having a first fixing portion and a second fixing portion provided so that an axial direction thereof is perpendicular to or parallel to the axial direction of the first fixing portion, The member is formed by bending a single plate material, and includes a main body member having a first fixing portion in which adjacent wall surfaces are continuous with each other by bending the plate material to form a cylindrical shape, and a second fixing portion in which adjacent wall surfaces are continuous with each other and perpendicular to each other by bending the plate material, At least one wall surface constituting the first fixing portion and one wall surface constituting the second fixing portion are on the same plane and are continuous. It is characterized by:

[0015] <Frame fittings (first and second examples)> The frame fittings according to the first and second embodiments of the present invention are frame fittings having, in addition to the first and second fixing portions, a third fixing portion arranged so that its axial direction is perpendicular to the axial direction of the first fixing portion and the axial direction of the second fixing portion, and the main body member has, in addition to the first fixing portion and the second fixing portion formed into a cylindrical shape by bending a plate material, a connecting portion located between the first fixing portion and the second fixing portion and connecting the first fixing portion and the second fixing portion, and the connecting portion of the main body member has a connecting wall that is parallel to both or one of the axial directions of the first fixing portion and the axial direction of the second fixing portion. <Frame fittings (third and fifth examples)> The frame fittings according to the third and fifth embodiments of the present invention are characterized in that the second fixing part is provided so that its axial direction is perpendicular to that of the first fixing part, one wall surface constituting the first fixing part and one wall surface constituting the second fixing part are on the same plane and continuous to form an L-shaped or I-shaped continuous surface, and the main body member is formed by bending the plate material successively at right angles using the continuous surface as a base. Note that the frame fitting according to the third embodiment is an embodiment having an I-shaped (straight) continuous surface, and the frame fitting according to the fifth embodiment is an embodiment having an L-shaped continuous surface. <Frame fittings (fourth and sixth examples)> The frame fittings according to the fourth and sixth embodiments of the present invention are characterized in that the second fixed part is provided so that its axial direction is perpendicular to the axial direction of the first fixed part, the main body member has, in addition to the first fixed part and the second fixed part, a third fixed part which is perpendicular to the axial direction of the first fixed part and is provided coaxially with the axial direction of the second fixed part, the third fixed part is formed by bending a plate material at a right angle to form a tube so that adjacent wall surfaces are continuous and perpendicular to each other, one wall surface constituting the first fixed part, one wall surface constituting the second fixed part and one wall surface constituting the third fixed part are on the same plane and are continuous to form a T-shaped continuous surface, and the main body member is formed by bending the plate material successively at right angles based on this continuous surface.

[0016] <frame> The frame of the present invention is a frame constructed using at least one of the frame fittings of the present invention, The frame fitting is characterized in that a cylindrical shaft member is connected to at least one of the first fixing portion or the second fixing portion, which is formed by bending a single sheet of plate material and has adjacent wall surfaces that are continuous and perpendicular to each other.

[0017] <Frame (First to Second Embodiments)> The frames according to the first and second embodiments of the present invention are formed by a corner member having three fixing portions perpendicular to one another, and an axial member connected to the fixing portion of the corner member, and are characterized in that the corner member is a frame fitting according to the first embodiment of the present invention in which the axial direction of the first fixing portion and the axial direction of the second fixing portion are perpendicular to each other. <Frame (third embodiment)> A frame according to a third embodiment of the present invention is a frame constructed using frame fittings according to the third or fifth embodiment and frame fittings according to the fourth or sixth embodiment, wherein the first fixing part and the second fixing part are both arranged on the same plane, at least one of the first fixing part or the second fixing part is connected to a tubular relay member or shaft-shaped member formed by bending a single sheet of plate material and arranged so that adjacent wall surfaces are continuous and perpendicular to each other, and one of the first fixing part or the second fixing part of the frame fittings is arranged so that its axial direction is vertical, and the other is arranged so that its axial direction is horizontal. Effect of the Invention

[0018] <Frame fittings> According to the frame hardware of the present invention, it is possible to provide a frame hardware that is easy to assemble a frame and that is easy to manufacture the members that make up the frame. That is, the frame hardware of the present invention has a main body member that is a member formed by bending a single sheet of plate material, and is characterized in that at least one wall surface that makes up the first fixing part and one wall surface that makes up the second fixing part are on the same plane and are continuous, and can be manufactured by processing the plate material into a predetermined shape and then bending it multiple times, so that it can be easily manufactured with high dimensional accuracy. Then, the frame can be easily assembled by simply connecting a shaft-shaped member or the like to this frame hardware. Moreover, the frame fittings according to the first and second embodiments are constructed only from a main body member and a connecting member, so that the frame is easy to assemble and the members that make up the frame are easy to manufacture. <frame> According to the frame of the present invention, the frame can be assembled simply by connecting various members such as shaft-shaped members to the frame metal fitting of the present invention, making frame manufacture easy. In particular, according to the frame metal fitting of the first embodiment, the three fixing parts that connect to the shaft-shaped members are provided so as to intersect at right angles, which increases the assembly precision of the formed frame. [Brief description of the drawings]

[0019] [Figure 1] FIG. 1 is a schematic explanatory diagram of a frame 1 of this embodiment (first embodiment). [Diagram 2] 1 is a partial exploded view (perspective view) of a frame 1 of the present embodiment. [Diagram 3] These are partial exploded views (plan views) of the frame 1 of this embodiment, where (A) is a schematic explanatory diagram of a state in which one corner member 10 and two shaft-shaped members 21, 22 are separated, and (B) is a schematic explanatory diagram of a state in which one corner member 10 and two shaft-shaped members 21, 22 are connected. [Figure 4] 1A and 1B are diagrams illustrating the relationship between one corner member 10 and three shaft-shaped members 21-23, where (A) is a schematic explanatory diagram of a state in which one corner member 10 and the three shaft-shaped members 21-23 are separated, and (B) is a schematic explanatory diagram of a state in which one corner member 10 and the three shaft-shaped members 21-23 are connected. [Diagram 5] 1A and 1B are explanatory views of the corner member 10 alone, with (A) and (B) showing the corner member 10 from different directions. [Figure 6] 1A is an explanatory view of a connecting member 16 of a corner member 10 alone, and FIG. 1B is an explanatory view of a main body member 11 of the corner member 10 alone. [Figure 7] 1A is a plan view of the connecting member 16 of the corner member 10 alone, FIG. 1B is a plan view of the main body member 11 of the corner member 10 alone, and FIG. [Figure 8] FIG. 11 is a schematic explanatory diagram of a frame 1B according to another embodiment (second embodiment) that uses the frame fittings according to the first and second examples. [Figure 9] FIG. 13 is an exploded view of a frame 1B according to another embodiment. [Figure 10]1A and 1B are partial exploded views of a frame 1B of another embodiment, where (A) is a schematic explanatory diagram of four corner members 10 connected to two first connecting shaft-shaped members CP1 and a second connecting shaft-shaped member CP2 to form one connecting structure CB, and (B) is a schematic explanatory diagram of the four corner members 10 separated from the two first connecting shaft-shaped members CP1 and the second connecting shaft-shaped member CP2. [Figure 11] 10A and 10B are explanatory diagrams of a first connecting shaft-shaped member CP1 formed by connecting an intermediate fitting 30, which is a frame fitting according to the second embodiment and connects corner members 10, to shaft-shaped members 24, 25, in which (A) is a schematic front view and (B) is a schematic side view. [Figure 12] 1A is a schematic explanatory diagram of an exploded view of the relay fitting 30 that connects the corner members 10 and the shaft-shaped members 24, 25, and FIG. 1B is a schematic oblique view of the relay fitting 30 that connects the corner members 10 and the shaft-shaped members 24, 25 connected together. [Figure 13] 1A is a schematic front view of relay fitting 30 in a disassembled state, FIG. 1B is a schematic side view of relay fitting 30 in a disassembled state, FIG. 1C is a schematic front view of shaft-shaped members 24 and 25, and FIG. 1D is a schematic side view of shaft-shaped member 25. [Figure 14] 1A and 1B are schematic front views, and FIG. 1C is a schematic side view of a second connecting shaft-shaped member CP2 formed by connecting an intermediate fitting 40 that connects corner members 10 to shaft-shaped members 24 and 25. [Figure 15] 1A is a schematic perspective view of an exploded view of a relay fitting 40 that connects corner members 10 and shaft-shaped members 24, 25, and FIG. 1B is a schematic perspective view of an exploded view of a relay fitting 30 that connects corner members 10 and shaft-shaped members 24, 25. [Figure 16] 1A is a schematic explanatory diagram of a shaft-shaped member 24, FIG. 1B is a schematic explanatory diagram of a relay fitting 40, and FIG. 1C is a schematic explanatory diagram of a shaft-shaped member 25. FIG. [Figure 17] FIG. 13 is a schematic perspective view showing a frame 1C of a third embodiment, which uses frame fittings according to the third to sixth embodiments, as viewed from the front side. [Figure 18]FIG. 11 is a schematic perspective view showing a frame 1C of a third embodiment from the back side. [Figure 19] FIG. 11 is a schematic perspective view showing a state in which a frame 1C according to a third embodiment is disassembled into units, as viewed from the front side. [Figure 20] FIG. 11 is a schematic perspective view showing a state in which a frame 1C according to a third embodiment is disassembled into units, as viewed from the rear side. [Figure 21] 10A and 10B are enlarged exploded views of unit A, in which (A) shows the exploded state of unit A from the front side, and (B) shows the exploded state of unit A from the rear side, and are particularly explanatory views of the frame metal fittings according to Example 3. [Figure 22] 13 is an enlarged exploded view of unit B, where (A) is a view showing the exploded state of unit B from the front side, and (B) is a view showing the exploded state of unit B from the rear side, and is particularly an explanatory view of the frame metal fittings according to Examples 4 and 5. [Figure 23] FIG. 13 is an enlarged exploded view showing the unit C from the front side, and is particularly an explanatory view of the frame metal fitting according to the sixth embodiment. [Figure 24] FIG. 13 is an enlarged exploded view showing the unit C from the rear side, and is particularly an explanatory view of the frame metal fitting according to the sixth embodiment. [Diagram 25] 1A and 1B are enlarged exploded views of units D1 and D2, in which (A) is a perspective view showing the exploded state of unit D1, and (B) is a perspective view showing the exploded state of unit D2. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] The frame fitting of the present invention is used when manufacturing frames for housings that house switchboards and the like, and is designed to facilitate assembly of the frame while also enabling high assembly precision.

[0021] Frames assembled using the frame fittings of the present invention are not limited to frames for housings that house distribution boards, etc., but can also be used as frames for platform doors installed on platforms, and frames for storage racks, tables, etc.

[0022] <<First embodiment>> Below, as a first embodiment of a frame fitting according to the present invention, the configuration of a frame 1 used to form a housing for accommodating a distribution board, the configuration and manufacturing method of a corner member 10 suitable for use with the frame 1, and a method of assembling the frame 1 using the corner member 10 will be described.

[0023] <Frame 1> As shown in Figures 1 and 2, a frame 1 (hereinafter, sometimes simply referred to as frame 1 of this embodiment) assembled using the frame fittings of this embodiment is formed by connecting four corner members 10 and twelve shaft-shaped members (four shaft-shaped members 21, four shaft-shaped members 22, and four shaft-shaped members 23).

[0024] <Corner member 10> The corner member 10 is a member that is placed at a corner of the frame 1 of this embodiment when the frame 1 of this embodiment is formed. As shown in Figures 2 and 3, the corner member 10 has three fixing parts (a first fixing part 12, a second fixing part 13, and a third fixing part 14) that are perpendicular to one another. More specifically, the three fixing parts 12, 13, and 14 of the corner member 10 are all formed in a substantially cylindrical shape. The three fixing parts 12, 13, and 14 are provided so that their axial directions are perpendicular to one another, and the first and second fixing parts 12 and 13 are connected by the third fixing part 14. The three fixing portions 12, 13, 14 have a pair of outer walls located outward and perpendicular to each other (in the fixing portions 12, 13, these correspond to the first wall f1 and the second wall f2, and in the fixing portion 14, these correspond to the third connecting wall Rf3 and the fourth connecting wall Rf4) (see Figures 4 and 6), and the outer surface of the corner member 10 is formed by the pairs of outer walls of the three fixing portions 12, 13, 14 (i.e., six wall surfaces).

[0025] This corner member 10 corresponds to the frame fitting in claim 2, which is provided so that the axial direction of the first fixing portion and the axial direction of the second fixing portion are perpendicular to each other. The corner member 10 is a frame metal fitting having a first fixing portion 12 and a second fixing portion 13 provided so that its axial direction is perpendicular to the axial direction of the first fixing portion 12. The corner member 10 is a member formed by bending a single sheet of plate material, and includes a main body member 11 having the first fixing portion 12 in which adjacent wall surfaces (first wall f1 and second wall f2) are continuous with each other by bending the sheet material into a cylindrical shape, and the second fixing portion 13 in which adjacent wall surfaces (first wall f1 and second wall f2) are continuous with each other and perpendicular to each other by bending the sheet material. One wall surface (first wall f1) constituting the first fixing portion 12 and one wall surface (first wall f1) constituting the second fixing portion 13 are on the same plane and continuous with each other (see FIG. 6(B)). As described above, the main body member 11 of the frame fitting (corner member 10) of the first form has the third fixing portion 14 in addition to the first fixing portion 12 and the second fixing portion 13. The corner member 10 will be described in detail later.

[0026] <Shaft-shaped members 21 to 23> The shaft-shaped members 21 to 23 are members that constitute the respective sides of the frame 1 of this embodiment when the frame 1 of this embodiment is formed. As shown in Fig. 1 and Fig. 2, the shaft-shaped members 21 to 23 are provided so as to connect adjacent corner members 10 to each other.

[0027] The shaft-shaped members 21 to 23 have main body portions 21a to 23a which are hollow shaft-shaped members that are long in the axial direction and have openings at both ends, and cover portions 21b to 23b provided at both ends of the main body portions 21a to 23a. The shaft-shaped members 21 to 23 are members that have substantially the same shape but different axial lengths, so the following description will be given using the shaft-shaped member 21 as a representative.

[0028] <Main body portion 21a> 3 and 4, the main body 21a includes a first wall W1, a pair of second walls W2, W2, and a third wall W3. The first wall W1, the pair of second walls W2, W2, and the third wall W3 of the main body 21a are all wall surfaces extending along the axial direction of the main body 21a and provided in parallel with the axial direction of the main body 21a, and adjacent wall surfaces are provided so as to be continuous with and perpendicular to each other.

[0029] More specifically, the pair of second walls W2, W2 of the main body 21a are provided such that their side edges parallel to the axial direction of the main body 21a (hereinafter may be simply referred to as the side edges of the pair of second walls W2, W2) are continuous with a pair of side edges of the first wall W1 parallel to the axial direction of the main body 21a (hereinafter may be simply referred to as the side edges of the first wall W1), and their surfaces are perpendicular to the surface of the first wall W1. The third wall W3 is provided such that one side edge parallel to the axial direction of the main body 21a (hereinafter may be simply referred to as the side edge of the third wall W3) (hereinafter may be simply referred to as the side edge of the third wall W3) (hereinafter may be simply referred to as the side edge of the third wall W3) is continuous with a side edge of one of the pair of second walls W2, W2 that is not continuous with the first wall W1, and its surface is perpendicular to the surface of one of the second walls W2 (in other words, parallel to the first wall W1).

[0030] <Cover part 21b> As shown in Figs. 2 to 4, cover parts 21b are provided at both ends of the main body part 21a. The cover part 21b has a pair of cover walls W4, W4 that are continuous from the first wall W1 and the other second wall W2 (the second wall W2 to which the third wall W3 is not connected). That is, the pair of cover walls W4, W4 of the cover part 21b are formed by extending the first wall W1 and the other second wall W2 of the main body part 21a, and are provided at both ends of the main body part 21a (that is, are provided so as to protrude from both ends of the main body part 21a). The pair of cover walls W4, W4 are formed so that their surfaces are perpendicular to each other, and are formed in a shape symmetrical with respect to a line (hereinafter sometimes simply referred to as an extension line) that extends the side edges that are continuous with the first wall W1 and the other second wall W2. Specifically, the pair of cover walls W4, W4 are formed so that their tip edges are inclined edges that have a vertex on the extension line. Moreover, the leading edges of the pair of cover walls W4, W4 are formed so as to form an angle of 45° with respect to the extension line.

[0031] <Formation of the Frame 1 of the Present Embodiment> Since the corner members 10 and the shaft-shaped members 21-23 have the structure described above, the frame 1 of this embodiment can be formed by using eight corner members 10 and twelve shaft-shaped members 21-23 (four shaft-shaped members 21, four shaft-shaped members 22, and four shaft-shaped members 23).

[0032] Specifically, the twelve shaft members 21-23 are attached to the three fixing parts 12, 13, 14 of the eight corner members 10 so that the four shaft members 21, the four shaft members 22, and the four shaft members 23 are parallel to each other. More specifically, the twelve shaft members 21-23 are attached to the three fixing parts 12, 13, 14 of the eight corner members 10 so that the three fixing parts 12, 13, 14 of the eight corner members 10 are inserted into the tip openings of the twelve shaft members 21-23, respectively. At this time, the three fixing parts 12, 13, 14 of each corner member 10 are inserted into the shaft-shaped members 21-23 until the leading edges of the pair of cover walls W4, W4 of the cover part 21b of the shaft-shaped members 21-23 attached to the three fixing parts 12, 13, 14 come into contact with each other (or until the main body part 21a comes into contact with the fixing parts 12, 13, 14 perpendicular to the fixing parts 12, 13, 14 inserted into the main body part 21a). Then, the entire outer surface or most of the outer surface of each corner member 10 is covered by the shaft-shaped members 21-23 (hereinafter, this state may be referred to as the inserted state). Then, when all the corner members 10 are in the inserted state, the three fixing parts 12, 13, 14 of each corner member 10 are fixed to the shaft-shaped members 21-23. Then, the frame 1 of this embodiment can be formed.

[0033] As described above, in the frame 1 of this embodiment, the frame 1 can be formed simply by inserting and fixing the twelve shaft-shaped members 21-23 into the three fixing portions 12, 13, 14 of the eight corner members 10, making it easy to form the frame 1.

[0034] Moreover, the shaft-shaped members 21-23 are formed of the main body parts 21a-23a having the first wall W1 and a pair of second walls W2, W2 and the third wall W3 as described above, and the cover part 21b having a pair of cover walls W4, W4 continuous with the first wall W1 and the second wall W2 of the main body parts 21a-23a, so that they can be formed from a single plate material. That is, the shaft-shaped members 21-23 can be formed by processing a single plate material into an expanded shape of the shaft-shaped members 21-23, and then simply bending the portion that becomes the side edge between the first wall W1 and the pair of second walls W2, W2, and the portion that becomes the side edge between the other second wall W2 and the third wall W3, so that the shaft-shaped members 21-23 can be manufactured easily and accurately.

[0035] Note that the shaft-shaped members 21 to 23 may be provided with holes or notches in addition to holes or the like for connecting the corner member 10 and the shaft-shaped members 21 to 23. If such holes or notches are provided, the holes or notches can be used when installing a shelf or the like on the frame 1 of this embodiment, and a plate (e.g., a rack plate) for installing equipment provided on a distribution board or the like can be fixed to the frame 1 of this embodiment using the holes or notches.

[0036] <Method of fixing corner member 10 and shaft-like members 21 to 23> There is no particular limitation on the method for fixing the three fixing portions 12, 13, 14 of each corner member 10 to the shaft-shaped members 21 to 23. It is sufficient that the three fixing portions 12, 13, 14 of the corner member 10 are fixed so as not to come off the shaft-shaped members 21 to 23 or to prevent the positions of the two from shifting.

[0037] For example, in the inserted state, the outer walls of the fixing parts 12, 13, 14 (the first wall f1 and the second wall f2 of the fixing parts 12, 13, the third connecting wall Rf3 and the fourth connecting wall Rf4 of the fixing part 14) overlap with the walls of the main parts 21a-23a of the shaft-shaped members 21-23 (the first wall W1, the pair of second walls W2, W2, the third wall W3). Therefore, a through hole is provided in the outer wall of each of the fixing parts 12, 13, 14, and a through hole is also provided in the wall of the main parts 21a-23a of the shaft-shaped members 21-23. Then, the through holes of each of the fixing parts 12, 13, 14 and the through holes of the shaft-shaped members 21-23 are formed at positions where they overlap with each other in the inserted state. Then, the three fixing portions 12, 13, 14 of the corner member 10 can be connected to the main body portions 21a-23a of the shaft-shaped members 21-23, i.e., the corner member 10 can be connected to the shaft-shaped members 21-23, by rivets or the like that pass through the through holes of each fixing portion 12, 13, 14 that overlaps in the inserted state and the through holes of the shaft-shaped members 21-23.

[0038] <Corner member 10> The corner member 10 will be described in detail below. 5, the corner member 10 is a member having three fixing portions 12, 13, 14, that is, a first fixing portion 12, a second fixing portion 13, and a third fixing portion 14. More specifically, the corner member 10 is a member formed by a main body member 11 having the two fixing portions 12, 13 and a connecting portion 15 connecting the two fixing portions 12, 13, and a connecting member 16 that is connected to the connecting portion 15 of the main body member 11 to form the third fixing portion 14.

[0039] <First fixed part 12> 5 to 7, first fixing portion 12 of main body member 11 is a portion formed in a substantially cylindrical shape and includes a first wall f1, a pair of second walls f2, f2, and a third wall f3. The first wall f1, the pair of second walls f2, f2, and the third wall f3 of first fixing portion 12 are all wall surfaces extending along the axial direction of first fixing portion 12 that are provided in parallel with the axial direction of first fixing portion 12, and adjacent wall surfaces are provided so as to be continuous with and perpendicular to each other.

[0040] More specifically, the pair of second walls f2, f2 of the first fixing part 12 are provided so that one side edge parallel to the axial direction of the first fixing part 12 (hereinafter may be simply referred to as the side edge of the pair of second walls f2, f2) is continuous with a pair of side edges of the first wall f1 parallel to the axial direction of the first fixing part 12 (hereinafter may be simply referred to as the side edge of the first wall f1), and the surface is perpendicular to the surface of the first wall f1. The third wall f3 is provided so that one side edge parallel to the axial direction of the first fixing part 12 (hereinafter may be simply referred to as the side edge of the third wall f3) is continuous with a side edge of one of the pair of second walls f2, f2 that is not continuous with the first wall f1, and the surface is perpendicular to the surface of one of the second walls f2. The first wall f1 of the first fixing part 12 and one of the pair of second walls f2, f2 constitute the outer wall of the first fixing part 12.

[0041] <Second fixed part 13> The second fixing portion 13 of the main body member 11 is a portion formed in a substantially cylindrical shape. The second fixing portion 13 has a structure substantially equivalent to that of the first fixing portion 12, and is a portion provided so that its axial direction is perpendicular to the axial direction of the first fixing portion 12. The second fixing portion 13 includes a first wall f1, a pair of second walls f2, f2, and a third wall f3. The first wall f1, the pair of second walls f2, f2, and the third wall f3 of the second fixing portion 13 are all wall surfaces extending along the axial direction of the second fixing portion 13 that are provided in parallel with the axial direction of the second fixing portion 13, and are provided so that adjacent wall surfaces are continuous and perpendicular to each other.

[0042] More specifically, the pair of second walls f2, f2 of the second fixing portion 13 are provided so that one side edge parallel to the axial direction of the second fixing portion 13 (hereinafter may be simply referred to as the side edge of the pair of second walls f2, f2) is continuous with a pair of side edges of the first wall f1 parallel to the axial direction of the first fixing portion 12 (hereinafter may be simply referred to as the side edge of the first wall f1), and the surface is perpendicular to the surface of the first wall f1. The third wall f3 is provided so that one side edge parallel to the axial direction of the second fixing portion 13 (hereinafter may be simply referred to as the side edge of the third wall f3) is continuous with a side edge of one of the pair of second walls f2, f2 that is not continuous with the first wall f1, and the surface is perpendicular to the surface of one of the second walls f2. The first wall f1 of the first fixing portion 13 and one of the pair of second walls f2, f2, the second wall f2, constitute the outer wall of the first fixing portion 13.

[0043] <Third fixed part 14> The third fixed portion 14 is formed by a connecting portion 15 of the main body member 11 that connects the first fixed portion 12 and the second fixed portion 13 described above, and a connecting member 16 that is connected to this connecting portion 15.

[0044] <Connection part 15> The connecting portion 15 includes a third connecting wall Rf3 and a fourth connecting wall Rf4. The third connecting wall Rf3 and the fourth connecting wall Rf4 of the connecting portion 15 are wall surfaces extending along the axial direction of the third fixing portion 14, which is provided parallel to the axial direction of the third fixing portion 14, and are provided so as to be continuous with each other at their side edges and perpendicular to each other. In other words, the third connecting wall Rf3 and the fourth connecting wall Rf4 of the connecting portion 15 are wall surfaces extending along the axial direction of an axis perpendicular to both the axial direction of the first fixing portion 12 and the axial direction of the second fixing portion 13, and are provided so as to be perpendicular to each other. The third connecting wall Rf3 and the fourth connecting wall Rf4 are connected to the first fixing portion 12 and the second fixing portion 13, respectively. More specifically, the third connecting wall Rf3 is formed as a wall surface continuous with one of the second walls W2 of the second fixing portion 13, and the fourth connecting wall Rf4 is formed as a wall surface continuous with one of the second walls W2 of the first fixing portion 12, respectively.

[0045] The connecting portion 15 has a first connecting wall Rf1 and a second connecting wall Rf2 that are continuous with the lower end edge of the third connecting wall Rf3 and the lower end edge of the fourth connecting wall Rf4. Specifically, the first connecting wall Rf1 is parallel to the axial direction of the first fixing portion 12 (in other words, perpendicular to the third connecting wall Rf3) and is formed as a wall surface that is continuous with the first wall W1 of the first fixing portion 12. Similarly, the second connecting wall Rf2 is parallel to the axial direction of the second fixing portion 13 (in other words, perpendicular to the fourth connecting wall Rf4) and is formed as a wall surface that is continuous with the first wall W1 of the second fixing portion 13. The first connecting wall Rf1 and the second connecting wall Rf2 have an engagement hole ch that penetrates between their inner surface and outer surface (see FIG. 6(A) and FIG. 7(B)). The first connecting wall Rf1 and the second connecting wall Rf2 may be formed as a part of the first wall W1 of the second fixing portion 13 and a part of the first wall W1 of the first fixing portion 12, respectively.

[0046] <Connecting member 16> The connecting member 16 is a member that is connected to the connecting portion 15 to form the third fixing portion 14. The connecting member 16 has a first connecting wall 16a and a second connecting wall 16b that are perpendicular to each other. The first connecting wall 16a and the second connecting wall 16b are plate-shaped walls that are perpendicular to each other. The first connecting wall 16a and the second connecting wall 16b each have a connecting protrusion 16p at one end (the lower end in FIG. 6(A)). The connecting protrusion 16p is a protrusion that is engaged with the engaging hole ch of the first connecting wall Rf1 and the second connecting wall Rf2 described above, and is formed to a size that can be inserted into the engaging hole ch.

[0047] The connecting member 16 also has a third connecting wall 16c and a fourth connecting wall 16d that are continuous with the first connecting wall 16a and the second connecting wall 16b, respectively. Specifically, the third connecting wall 16c is a plate-shaped wall that is continuous with the side edge of the first connecting wall 16a opposite to the side edge that is continuous with the second connecting wall 16b and is provided so as to be perpendicular to the first connecting wall 16a. The fourth connecting wall 16d is a plate-shaped wall that is continuous with the side edge of the second connecting wall 16b opposite to the side edge that is continuous with the first connecting wall 16a and is provided so as to be perpendicular to the second connecting wall 16b.

[0048] Since the connecting portion 15 and the connecting member 16 have the above-mentioned shapes, the third fixing portion 14 can be formed by connecting the connecting portion 15 and the connecting member 16 as follows. As shown in Fig. 5 and Fig. 7(C), the connecting member 16 is arranged so that the outer surface of the third connecting wall 16c is in surface contact with the inner surface of the third connecting wall Rf3, and the outer surface of the fourth connecting wall 16d is in surface contact with the inner surface of the fourth connecting wall Rf4. In this state, the connecting member 16 is moved toward the first connecting wall Rf1 and the second connecting wall Rf2, and the connecting protrusion 16p of the first connecting wall 16a and the connecting protrusion 16p of the second connecting wall 16b are inserted into the engagement hole ch of the first connecting wall Rf1 and the engagement hole ch of the second connecting wall Rf2. Then, the third connecting wall Rf3 and the fourth connecting wall Rf4 of the connecting portion 15 of the main body member 11 are connected to the third connecting wall 16c and the fourth connecting wall 16d of the connecting member 16, and the connecting member 16 is fixed to the connecting portion 15. As a result, the third connecting wall Rf3 and the fourth connecting wall Rf4 of the connecting portion 15 and the first connecting wall 16a and the second connecting wall 16b of the connecting member 16 can form a third fixing portion 14 having a generally rectangular cross-section, that is, a shape substantially equivalent to the first and second fixing portions 12, 13.

[0049] As described above, the corner member 10 is made up of two members, the main body member 11 and the connecting member 16, and can be formed simply by connecting the two members, so that the corner member 10 can be easily formed.

[0050] Moreover, both the main body member 11 and the connecting member 16 can be formed simply by processing a single plate-like member into a predetermined shape and bending it by pressing or the like to form holes. This allows the main body member 11 and the connecting member 16 to be easily formed while maintaining high processing precision. As described above, the main body member 11 and the connecting member 16 may be formed by bending the plate material and then drilling holes, but they may also be formed by forming holes in the plate material and then bending it.

[0051] More specifically, the main body member 11 has first and second fixing portions 12, 13 each formed of the first wall f1, a pair of second walls f2, f2, and a third wall f3 as described above, and the third connecting wall Rf3 and the fourth connecting wall Rf4 of the connecting portion 15 are formed as wall surfaces continuous with one second wall W2 of the first fixing portion 12 and one second wall W2 of the second fixing portion 13, respectively. The first connecting wall Rf1 and the second connecting wall Rf2 of the connecting portion 15 are also formed as wall surfaces continuous with the lower edge of the third connecting wall Rf3 and the lower edge of the fourth connecting wall Rf4. Therefore, the main body member 11 can be formed simply by processing a single plate material into an unfolded shape of the first and second fixing portions 12, 13 and the connecting portion 15, and bending the plate material at the portions that become the side edges between the first wall f1 and the pair of second walls f2, f2 of the first and second fixing portions 12, 13, the portions that become the side edges of the third connecting wall Rf3 and the fourth connecting wall Rf4, and the portions that become the lower edges of the third connecting wall Rf3 and the fourth connecting wall Rf4. Therefore, the main body member 11 can be easily formed while maintaining high processing accuracy of the main body member 11.

[0052] Furthermore, the connecting member 16 can be formed by simply processing a single plate material into an expanded shape of the first connecting wall 16a, the second connecting wall 16b, the third connecting wall 16c, and the fourth connecting wall 16d of the connecting member 16, and bending the plate material at a portion that will become a side edge connecting the first connecting wall 16a and the second connecting wall 16b, a portion that will become a side edge connecting the first connecting wall 16a and the third connecting wall 16c, and a portion that will become a side edge connecting the second connecting wall 16b and the fourth connecting wall 16d. Therefore, the connecting member 16 can be easily formed while maintaining a high processing accuracy of the connecting member 16.

[0053] Furthermore, when the corner member 10 connects the third connecting wall Rf3 and the fourth connecting wall Rf4 of the connecting portion 15 of the main body member 11 to the third connecting wall 16c and the fourth connecting wall 16d of the connecting member 16, the connecting member 16 can maintain a state in which the first connecting wall Rf1 and the second connecting wall Rf2 of the connecting portion 15 are perpendicular to each other. Therefore, even if the main body member 11 is formed by bending a single plate material, the connecting member 16 can accurately maintain a state in which the axial direction of the first fixing portion 12 and the axial direction of the second fixing portion 13 are perpendicular to each other.

[0054] In particular, since the connecting projection 16p of the first connecting wall 16a and the connecting projection 16p of the second connecting wall 16b of the connecting member 16 can be engaged with the engaging hole ch of the third connecting wall Rf3 and the engaging hole ch of the fourth connecting wall Rf4 of the connecting portion 15, the relative movement of the third connecting wall Rf3 and the fourth connecting wall Rf4 of the connecting portion 15 of the main body member 11 can also be fixed. Then, the state in which the axial direction of the first fixing portion 12 and the axial direction of the second fixing portion 13 are perpendicular to each other can be more firmly maintained by the connecting member 16 than in the case where the third connecting wall Rf3 and the fourth connecting wall Rf4 of the connecting portion 15 of the main body member 11 are simply connected to the third connecting wall 16c and the fourth connecting wall 16d of the connecting member 16.

[0055] It is not necessary to provide the engagement holes ch in the third connecting wall Rf3 and the fourth connecting wall Rf4 of the connecting portion 15 and the connection protrusions 16p in the first connecting wall 16a and the second connecting wall 16b of the connecting member 16. However, if the engagement holes ch in the third connecting wall Rf3 and the fourth connecting wall Rf4 of the connecting portion 15 and the connection protrusions 16p in the first connecting wall 16a and the second connecting wall 16b of the connecting member 16 are provided, an effect is obtained in that the connecting member 16 can more firmly maintain a state in which the axial direction of the first fixing portion 12 and the axial direction of the second fixing portion 13 are perpendicular to each other.

[0056] <About main body member 11> In the above example, the three fixing parts 12, 13, 14 of the main body member 11 are formed in a cylindrical shape with a rectangular cross section, but the shape of the three fixing parts 12, 13, 14 does not necessarily have to be rectangular in cross section. It is sufficient that the shape has a pair of outer walls located outside the main body member 11 and perpendicular to each other, and can be formed by bending a single plate-like member. For example, the first fixing part 12 and the second fixing part 13 may be formed in a triangular cross section having a first wall f1 and a second wall f2 perpendicular to each other, and an inclined wall connecting the first wall f1 and the second wall f2. Similarly, the third fixing part 14 may also adopt a flat plate connecting between the third connecting wall Rf3 and the fourth connecting wall Rf4 of the connecting part 15 as the connecting member 16, and the third fixing part 14 may have a triangular cross section having an inclined wall connecting the third connecting wall Rf3 and the fourth connecting wall Rf4.

[0057] <How to connect> There is no particular limitation on the method of connecting the connecting member 16 to the connecting portion 15. It is sufficient that the connecting member 16 is configured to connect the first connecting wall Rf1 and the second connecting wall Rf2 of the connecting portion 15 of the main body member 11 and to connect the third connecting wall Rf3 and the fourth connecting wall Rf4 so as to maintain a state in which the axial direction of the first fixing portion 12 and the axial direction of the second fixing portion 13 are perpendicular to each other.

[0058] In the case where the third fixing portion 14 is not rectangular in cross section, the connecting member 16 may be configured to connect the first connecting wall Rf1 and the second connecting wall Rf2 of the connecting portion 15 so as not to move when the axial direction of the first fixing portion 12 and the axial direction of the second fixing portion 13 are perpendicular to each other, that is, when the first connecting wall Rf1 and the second connecting wall Rf2 of the connecting portion 15 are perpendicular to each other. For example, a member formed by bending both ends of a shaft material, one end of which can be connected to the third connecting wall Rf3 and the other end of which can be connected to the fourth connecting wall Rf4, may be used as the connecting member. Also, a member formed by bending both ends of a shaft material, one end of which can be inserted into the engagement hole ch of the first connecting wall Rf1 and the other end of which can be inserted into the engagement hole ch of the fourth connecting wall Rf2 may be used as the connecting member.

[0059] Furthermore, in this specification, "connecting the first connecting wall Rf1 and the second connecting wall Rf2 of the connecting portion 15 of the main body member 11 so as to maintain a state in which the axial direction of the first fixing portion 12 and the axial direction of the second fixing portion 13 are perpendicular to each other by the connecting member 16" also includes a state in which the third connecting wall Rf3 continuous with the first connecting wall Rf1 and the fourth connecting wall Rf4 continuous with the second connecting wall Rf2 are connected, as in the above example.

[0060] In the above example, the third connecting wall Rf3 and the fourth connecting wall Rf4 of the connecting portion 15 constitute the third fixing portion 14, that is, the third connecting wall Rf3 and the fourth connecting wall Rf4 constitute the portion inserted into the tip opening of the shaft-shaped members 21 to 23. The third connecting wall Rf3 and the fourth connecting wall Rf4 of the connecting portion 15 do not necessarily constitute the portion inserted into the tip opening of the shaft-shaped members 21 to 23. In this case, it is sufficient that the third connecting wall 16c and the fourth connecting wall 16d of the connecting member 16 have the same function as the third connecting wall Rf3 and the fourth connecting wall Rf4 of the connecting portion 15 described above when the connecting portion 15 and the connecting member 16 are connected. In other words, the third connecting wall 16c and the fourth connecting wall 16d of the connecting member 16 may constitute the portion inserted into the tip opening of the shaft-shaped members 21 to 23.

[0061] Further, the connecting portion 15 has been described as having the first connecting wall Rf1 and the second connecting wall Rf2, but the first connecting wall Rf1 and the second connecting wall Rf2 do not necessarily have to be provided.

[0062] <Regarding shaft-shaped members 21 to 23> In the above example, the shaft-shaped members 21-23 are formed in a cylindrical shape with a rectangular cross section, but the shaft-shaped members 21-23 may be formed in a shape that allows the three fixing parts 12, 13, 14 of the corner member 10 to be inserted through their openings. In particular, the shaft-shaped members 21-23 may be formed so that the three fixing parts 12, 13, 14 of the corner member 10 can be accommodated in the main body parts 21a-23a of the shaft-shaped members 21-23 with the outer surfaces of the outer walls of the three fixing parts 12, 13, 14 of the corner member 10 in surface contact with the inner surfaces of any two of the first wall W1, the pair of second walls W2, W2, and the third wall W3 that constitute the main body parts 21a-23a of the shaft-shaped members 21-23.

[0063] The main body of the shaft-shaped member does not necessarily have to be formed in a cylindrical shape. It is sufficient that the main body is made of a member having sufficient strength to maintain the shape of the frame 1 of this embodiment when it is formed. For example, an angle material having an L-shaped cross section can be used as the shaft-shaped member. However, if the shaft-shaped member is a member formed in a cylindrical shape, the shaft-shaped member and the fixing parts 12, 13, and 14 of the corner member 10 can be easily and stably connected, and the rigidity of the frame 1 of this embodiment can be increased compared to the angle material having an L-shaped cross section.

[0064] The shaft-shaped members 21-23 do not necessarily have to have the cover parts 21b-23b. However, if the cover parts 21b-23b are provided, the parts of the corner member 10 that cannot be inserted into the main body parts 21a-23a of the shaft-shaped members 21-23 can be covered with the cover parts 21b-23b. Then, the entire (or almost the entire) outer surface of the corner member 10 can be covered with the shaft-shaped members 21-23, so that the connection state between the corner member 10 and the shaft-shaped members 21-23 can be strengthened when they are connected. Furthermore, if the cover parts 21b-23b are provided on the shaft-shaped members 21-23, the entire (or almost the entire) outer surface of the frame 1 of this embodiment can be formed by the outer surface of the shaft-shaped members 21-23. Then, the outer surface of the frame 1 can be made to have no steps (or only slight steps), so that the appearance of the frame 1 can be improved. Furthermore, when a housing is formed using the frame 1 of this embodiment, it becomes easier to attach a plate-shaped member to the outer surface of the frame 1 of this embodiment.

[0065] <<Second embodiment>> As another embodiment of the frame 1, the configuration and assembly method of a frame 1B using a corner member 10 will be described below.

[0066] <Frame 1B of another embodiment> In the frame 1 of this embodiment, the case where adjacent corner members 10 are connected by one shaft-shaped member 21-23 has been described, but adjacent corner members 10 may be connected by multiple shaft-shaped members. In this case, a configuration can be adopted in which multiple shaft-shaped members are connected using metal fittings (relay metal fittings) having a portion that is inserted into the shaft-shaped members. An example of a frame 1B (frame 1B of the second embodiment) in which multiple shaft-shaped members are connected using such relay metal fittings will be described below. There is no particular limitation on the metal fittings used to connect multiple axial members together, and the axial members may be connected together using general connecting plates, etc., but the connection between the axial members can be made stronger by using relay fittings as described below.

[0067] <Frame 1B> As shown in Fig. 8, frame 1B of the second embodiment is formed by connecting four corner members 10 with shaft-shaped members 22, 24, 25, and 26. Frame 1B of the second embodiment has a structure different from that of frame 1 described above in the following respects. That is, frame 1B differs from frame 1 of the present embodiment in that adjacent corner members 10 are connected by shaft-shaped members 24, 25 connected by relay metal fittings 30, 40 instead of the four shaft-shaped members 21 and four shaft-shaped members 23 in frame 1 of the present embodiment, and that shaft-shaped members 24, 25 connected by relay metal fitting 30 are connected by shaft-shaped member 26. In the following, the frame 1B of the second embodiment will be described in terms of the different configuration from the frame 1 of the above-described present embodiment, and the description of the other configurations will be omitted as appropriate.

[0068] <Corner member 10> The corner member 10 has the same structure as the corner member 10 that forms the frame 1 of the present embodiment. That is, it is a member that is placed at a corner of the frame 1B of the second embodiment, and has three fixing parts (a first fixing part 12, a second fixing part 13, and a third fixing part 14) that are perpendicular to each other.

[0069] <Shaft-shaped member 22> 8, the shaft-shaped member 22 is a member that connects adjacent corner members 10. This shaft-shaped member 22 has the same structure as the shaft-shaped member 22 that forms the frame 1 of the present embodiment.

[0070] <Shaft-shaped members 24, 25> The shaft-shaped members 24, 25 are provided so as to connect adjacent corner members 10 together while being connected by relay fittings 30, 40. The shaft-shaped members 24, 25 have main body portions 24a, 25a which are hollow shaft-shaped members that are long in the axial direction and have openings at both ends, and cover portions 24b, 25b provided at one end of the main body portions 24a, 25a. The shaft-shaped members 24 and 25 are members having substantially the same shape except that they have a structure that is plane-symmetrical with respect to the symmetry plane SP shown in Fig. 13(B), so the following description will be given using the shaft-shaped member 24 as a representative.

[0071] <Main body portion 24a> 11 to 15, the main body 24a of the shaft-shaped member 24 includes a first wall W1, a pair of second walls W2, W2, and a third wall W3, similar to the main body parts 21a to 23a of the shaft-shaped members 21 to 23. The first wall W1, the pair of second walls W2, W2, and the third wall W3 of the main body part 24a are all wall surfaces extending along the axial direction of the main body part 24a and provided in parallel with the axial direction of the main body part 24a, and adjacent wall surfaces are provided so as to be continuous with and perpendicular to each other.

[0072] More specifically, the pair of second walls W2, W2 of the main body 24a are provided such that their side edges parallel to the axial direction of the main body 24a (hereinafter may be simply referred to as the side edges of the pair of second walls W2, W2) are continuous with a pair of side edges of the first wall W1 parallel to the axial direction of the main body 24a (hereinafter may be simply referred to as the side edges of the first wall W1), and their surfaces are perpendicular to the surface of the first wall W1. The third wall W3 is provided such that one side edge parallel to the axial direction of the main body 24a (hereinafter may be simply referred to as the side edge of the third wall W3) (hereinafter may be simply referred to as the side edge of the third wall W3) (hereinafter may be simply referred to as the side edge of the third wall W3) is continuous with a side edge of one of the pair of second walls W2, W2 that is not continuous with the first wall W1, and its surface is perpendicular to the surface of one of the second walls W2.

[0073] <Cover part 24b> As shown in Figs. 11 to 15, the main body 24a is provided with a cover portion 24b at one end (the left end in Fig. 11(A)), and the other end is formed to be an end surface perpendicular to the axial direction of the main body 24a. The cover portion 24b has a pair of cover walls W4, W4 continuing from the first wall W1 and the other second wall W2 (the second wall W2 to which the third wall W3 is not connected). That is, the pair of cover walls W4, W4 of the cover portion 21b are formed by extending the first wall W1 and the other second wall W2 of the main body 24a, and are provided at one end of the main body 21a (that is, provided to protrude from the tip of one end of the main body 24a). The pair of cover walls W4, W4 are formed so that their surfaces are perpendicular to each other, and are formed in a shape symmetrical with respect to a line extending the side edge continuing from the first wall W1 and the other second wall W2 (hereinafter, sometimes simply referred to as an extension line). Specifically, the pair of cover walls W4, W4 are formed so that their leading edges are inclined edges having a vertex on the extension line, and the leading edges of the pair of cover walls W4, W4 are formed so that the angle they form with respect to the extension line is 45°.

[0074] At the other end (the end on the right side in FIG. 11(A)) of the main body portion 24a of the shaft-shaped member 24 connected by the relay metal fitting 30, a notch 24g is provided between the first wall W1 and the third wall W3 of the main body portion 24a. This notch 24g is a portion that accommodates the third fixing portion 34 of the relay metal fitting 30 (i.e., the connecting portion 35 of the main body member 31 of the relay metal fitting 30) when the shaft-shaped member 24 is connected to the first fixing portion 32 of the relay metal fitting 30 (when the shaft-shaped member 24 is connected to the second fixing portion 33 of the relay metal fitting 30 in the case of the shaft-shaped member 25). This notch 24g is provided in the shaft-shaped members 24 connected by the relay metal fitting 30, but does not have to be provided in the shaft-shaped members 24 connected by the relay metal fitting 40.

[0075] <Relay bracket 30, relay bracket 40> As shown in FIGS. 8 and 10, the shaft-shaped member 24 and the shaft-shaped member 25 are connected by a relay metal fitting 30 or a relay metal fitting 40 .

[0076] The relay metal fitting 30 has three fixing portions (a first fixing portion 32, a second fixing portion 33, and a third fixing portion 34) similar to the above-described corner member 10. In the relay metal fitting 30, the third fixing portion 34 is provided so that its axial direction is perpendicular to the axial direction of the first fixing portion 32 and the axial direction of the second fixing portion 33, but unlike the corner member 10, the axial direction of the first fixing portion 32 and the axial direction of the second fixing portion 33 are coaxial. Details of the relay metal fitting 30 will be described later. The relay metal fitting 40 is a tubular member having substantially the same structure as the first fixing portion 32 (or the second fixing portion 33) of the above-mentioned relay metal fitting 30. The details of this relay metal fitting 40 will be described later.

[0077] <Shaft-shaped member 26> As shown in Figs. 8 and 9, the shaft-shaped member 26 is a member provided to connect the shaft-shaped members 24, 25 connected by the relay metal fitting 30. Specifically, both ends of the shaft-shaped member 26 are connected to the third fixing portion 34 of the relay metal fitting 30 provided between the shaft-shaped members 24, 25. The shaft-shaped member 26 has substantially the same structure as the shaft-shaped members 21-23 forming the frame 1 of this embodiment, except that the shaft-shaped member 26 does not have the cover portion 21b. That is, the shaft-shaped member 26 includes a first wall W1, a pair of second walls W2, W2, and a third wall W3 (see Fig. 9) like the main body portions 21a-23a of the shaft-shaped members 21-23, and has a structure into which the third fixing portion 34 of the relay metal fitting 30 can be inserted from its end.

[0078] The structure of the shaft-shaped member 26 is not particularly limited as long as it is a tubular member having a structure that allows it to be connected to the third fixing portion 34 of the relay fitting 30. For example, the shaft-shaped member 26 may be formed of a simple steel pipe having a structure that allows the third fixing portion 34 of the relay fitting 30 to be inserted into its end. Furthermore, the shaft-shaped member 26 does not necessarily have to have the above-mentioned cylindrical structure, so long as it can be connected to the third fixing portion 34 of the relay metal fitting 30 provided between the shaft-shaped members 24, 25. For example, a plate material or an L-shaped shaft material may be used. However, if the shaft-shaped member 26 is a cylindrical member as described above, it becomes easier to connect the third fixing portions 34 of the relay metal fitting 30 provided between the shaft-shaped members 24, 25, and the rigidity of the frame 1B can be increased.

[0079] <Formation of Frame 1B of Second Embodiment> Since the corner members 10 and the shaft-shaped members 22, 24, 25, 26 have the structure described above, the frame 1B can be formed by using eight corner members 10, 14 shaft-shaped members 22, 24, 25, 26 (four shaft-shaped members 22, four shaft-shaped members 24, four shaft-shaped members 25, and two shaft-shaped members 26), four relay fittings 30, and four relay fittings 40.

[0080] Specifically, the shaft-shaped members 24, 25 are respectively connected to the first fixing portions 32 and second fixing portions 33 of the four intermediate fittings 30 to form four first connecting shaft-shaped members CP1 (see Figs. 11(A) and 12(B)), and the shaft-shaped members 24, 25 are connected with intermediate fittings 40 to form four second connecting shaft-shaped members CP2 (see Figs. 14(A), (B), and 15(B)). Then, the four first connecting shaft-shaped members CP1 and the four second connecting shaft-shaped members CP2 are attached to the first fixing portions 12 and second fixing portions 13 of the eight corner members 10 so that the four first connecting shaft-shaped members CP1 and the four second connecting shaft-shaped members CP2 are parallel to each other, respectively. More specifically, the four first connecting shaft-like members CP1 and the four second connecting shaft-like members CP2 are attached to the first fixing portions 12 and second fixing portions 13 of the eight corner members 10, respectively, so that the first fixing portions 12 and second fixing portions 13 of the eight corner members 10 are inserted into the tip openings of the shaft-like members 24, 25 that constitute the four second connecting shaft-like members CP2. Then, two connecting structures CB are formed (see Figures 9 and 10(A)).

[0081] Next, the four shaft-like members 22 and the two shaft-like members 26 are attached to the third fixing portions 14 of the eight corner members 10 and the third fixing portions 34 of the four relay fittings 30 so that the four shaft-like members 22 and the two shaft-like members 26 are parallel to each other. More specifically, the four shaft-like members 22 and the two shaft-like members 26 are attached to the third fixing portions 14 of the eight corner members 10 and the third fixing portions 34 of the four relay fittings 30 so that the third fixing portions 14 of the eight corner members 10 are inserted into the tip openings at both ends of the four shaft-like members 22, and the third fixing portions 34 of the four relay fittings 30 are inserted into the tip openings at both ends of the two shaft-like members 26. Then, by fixing the three fixing portions 12, 13, and 14 of all the corner members 10 to the first connecting shaft-like member CP1, the second connecting shaft-like member CP2, and the shaft-like members 22 and 26, the frame 1B can be formed.

[0082] As described above, in the frame 1B as well, the first connecting shaft-shaped member CP1 can be formed simply by inserting and fixing the shaft-shaped members 24, 25 into the first fixing portion 32 and the second fixing portion 33 of the relay metal fitting 30, respectively, and the second connecting shaft-shaped member CP2 can be formed simply by connecting the shaft-shaped members 24, 25 with the relay metal fitting 40. Moreover, since the frame 1B can be formed simply by inserting and fixing the four first connecting shaft-shaped members CP1, the four second connecting shaft-shaped members CP2, the four shaft-shaped members 22, and the two shaft-shaped members 26 into the three fixing portions 12, 13, 14 of the eight corner members 10 and the third fixing portions 34 of the four relay metal fittings 30, the formation of the frame 1B is facilitated.

[0083] In addition, in the frame 1B, it is possible to adopt a second connecting shaft-shaped member CP2 in place of the shaft-shaped member 22, and it is also possible to use a connecting shaft-shaped member in which a shaft-shaped member having the same structure as the shaft-shaped member 26 is connected by a connecting fitting 40 in place of the shaft-shaped member 26.

[0084] Furthermore, the shaft-shaped members 24 to 26 may be provided with holes or notches in addition to holes or the like for connecting the corner member 10 and the relay fittings 30, 40 to the shaft-shaped members 24 to 26. If such holes or notches are provided, the holes or notches can be used when installing a shelf or the like on the frame 1B of the second embodiment, and a plate material (e.g., a rack plate) for installing equipment provided on a distribution board or the like can be fixed to the frame 1B of the second embodiment by using the holes or notches.

[0085] <Method of fixing the corner member 10 and the intermediate fittings 30, 40 to the shaft-shaped members 22, 24, 25, 26> There is no particular limitation on the method of fixing the three fixing parts 12, 13, 14 of each corner member 10, the three fixing parts 31, 32, 33 of the relay metal fitting 30, and the relay metal fitting 40 to the shaft-shaped members 22, 24, 25, 26. Any method can be used as long as the three fixing parts 12, 13, 14 of the corner member 10, the three fixing parts 31, 32, 33 of the relay metal fitting 30, and the relay metal fitting 40 are fixed so as not to fall off or shift from the shaft-shaped members 22, 24, 25, 26. For example, rivets, screws, etc. can be used to fix the three fixing parts 12, 13, 14 of each corner member 10, the three fixing parts 31, 32, 33 of the relay metal fitting 30, and the relay metal fitting 40 to the shaft-shaped members 22, 24, 25, 26.

[0086] <Relay bracket 30, 40> The relay fittings 30 and 40 will be described in detail below.

[0087] <Relay bracket 30> First, the relay fitting 30 will be described. The relay fitting 30 is a frame fitting having a first fixing portion 32 and a second fixing portion 33 provided so that its axial direction is parallel to that of the first fixing portion 32. The relay fitting 30 is provided with a main body member 31, which is a member formed by bending a single sheet of plate material and has the first fixing portion 32, which is formed by bending the sheet material into a cylindrical shape so that adjacent wall surfaces are continuous with each other, and the second fixing portion 33, which is formed by bending the sheet material so that adjacent wall surfaces are continuous with each other and perpendicular to each other. At least one wall surface constituting the first fixing portion 32 and one wall surface constituting the second fixing portion 33 are on the same plane and are continuous with each other. Specifically, with regard to the relay fitting 30, the first wall f1 of the first fixing portion 32 and the first wall f1 of the second fixing portion 33 are on the same plane and are continuous, the pair of first walls f2, f2 of the first fixing portion 32 and the second walls f2, f2 of the second fixing portion 33 are respectively on the same plane and are continuous, and the third wall f3 of the first fixing portion 32 and the third wall f3 of the second fixing portion 33 are on the same plane and are continuous (see Figures 12(A) and 13(A)). In addition, the main body member 31 of the frame metal fitting (relay metal fitting 30) of the second embodiment has a third fixing portion in addition to a first fixing portion 32 and a second fixing portion 33. 11 to 13, the relay metal fitting 30 is a member having three fixing portions 32, 33, 34, i.e., a first fixing portion 32, a second fixing portion 33, and a third fixing portion 34. More specifically, the relay metal fitting 30 is a member formed by a main body member 31 having two fixing portions 32, 33 and a connecting portion 35 connecting the two fixing portions 32, 33, and a connecting member 36 connected to the connecting portion 35 of the main body member 31 to form the third fixing portion 34.

[0088] <First fixed part 32> 11 to 13, the first fixing portion 32 of the main body member 31 is a portion formed in a generally cylindrical shape and has substantially the same shape as the first fixing portion 11 of the corner member 10. This first fixing portion 32 includes a first wall f1, a pair of second walls f2, f2, and a third wall f3. The first wall f1, the pair of second walls f2, f2, and the third wall f3 of this first fixing portion 32 are all wall surfaces extending along the axial direction of the first fixing portion 32 that are provided in parallel with the axial direction of the first fixing portion 32, and are provided so that adjacent wall surfaces are continuous with and perpendicular to each other.

[0089] More specifically, the pair of second walls f2, f2 of the first fixing portion 32 are provided such that one side edge parallel to the axial direction of the first fixing portion 32 (hereinafter may be simply referred to as the side edge of the pair of second walls f2, f2) is continuous with a pair of side edges of the first wall f1 parallel to the axial direction of the first fixing portion 32 (hereinafter may be simply referred to as the side edge of the first wall f1), and the surface is perpendicular to the surface of the first wall f1. The third wall f3 is provided such that one side edge parallel to the axial direction of the first fixing portion 32 (hereinafter may be simply referred to as the side edge of the third wall f3) is continuous with a side edge of one of the pair of second walls f2, f2 that is not continuous with the first wall f1, and the surface is perpendicular to the surface of one of the second walls f2.

[0090] <Second fixed part 33> The second fixing portion 33 of the main body member 31 is a portion formed in a substantially cylindrical shape and has a shape substantially equivalent to that of the second fixing portion 11 of the corner member 10. The second fixing portion 33 has a structure substantially equivalent to that of the first fixing portion 32, and is a portion provided so that its axial direction is parallel to the axial direction of the first fixing portion 32. The second fixing portion 33 includes a first wall f1, a pair of second walls f2, f2, and a third wall f3. The first wall f1, the pair of second walls f2, f2, and the third wall f3 of the second fixing portion 33 are all wall surfaces extending along the axial direction of the second fixing portion 33 that are provided parallel to the axial direction of the second fixing portion 33, and are provided so that adjacent wall surfaces are continuous and perpendicular to each other.

[0091] More specifically, the pair of second walls f2, f2 of the second fixing portion 33 are provided such that one side edge parallel to the axial direction of the second fixing portion 33 (hereinafter may be simply referred to as the side edge of the pair of second walls f2, f2) is continuous with a pair of side edges of the first wall f1 parallel to the axial direction of the first fixing portion 12 (hereinafter may be simply referred to as the side edge of the first wall f1), and the surface is perpendicular to the surface of the first wall f1. The third wall f3 is provided such that one side edge parallel to the axial direction of the second fixing portion 33 (hereinafter may be simply referred to as the side edge of the third wall f3) is continuous with a side edge of one of the pair of second walls f2, f2 that is not continuous with the first wall f1, and the surface is perpendicular to the surface of one of the second walls f2.

[0092] <Third fixed part 34> The third fixing portion 34 is formed by a connecting portion 35 of the main body member 31 that connects the first fixing portion 32 and the second fixing portion 33 described above, and a connecting member 36 that is connected to this connecting portion 35.

[0093] <Connection part 35> The connecting portion 35 includes a third connecting wall Rf3, a fourth connecting wall Rf4, and a fifth connecting wall Rf5 provided between the third connecting wall Rf3 and the fourth connecting wall Rf4. The third connecting wall Rf3, the fourth connecting wall Rf4, and the fifth connecting wall Rf5 of the connecting portion 35 are wall surfaces extending parallel to the axial direction of the third fixing portion 34 (in other words, wall surfaces extending parallel to the axial direction of an axis perpendicular to the axial direction of the first fixing portion 32 (the axial direction of the second fixing portion 33)), and are provided perpendicular to each other. The third connecting wall Rf3 is provided such that one side edge is continuous with one side edge of the fifth connecting wall Rf5, and the surface of the third connecting wall Rf3 and the surface of the fifth connecting wall Rf5 are perpendicular to each other. The fourth connecting wall Rf4 is provided such that one side edge is continuous with the other side edge of the fifth connecting wall Rf5 and the surface of the fourth connecting wall Rf4 is perpendicular to the surface of the fifth connecting wall Rf5. The surface of the third connecting wall Rf3 and the surface of the fourth connecting wall Rf4 are parallel to each other, and an opening is formed between the other side edge of the third connecting wall Rf3 and the other side edge of the fourth connecting wall Rf4. The lower part of the fifth connecting wall Rf5 is connected to the first fixing part 32 and the second fixing part 33. More specifically, the fifth connecting wall Rf5 is formed as a wall surface continuous with one of the second walls W2 of the first fixing part 12 and one of the second walls W2 of the second fixing part 13.

[0094] The connecting portion 35 has a first connecting wall Rf1 that is continuous with the lower edge of the fifth connecting wall Rf5. Specifically, the first connecting wall Rf1 is parallel to the axial direction of the first fixing portion 32 (the axial direction of the second fixing portion 33) (in other words, perpendicular to the fifth connecting wall Rf5) and is formed as a wall surface that is continuous with the first wall W1 of the first fixing portion 32 and the first wall W1 of the second fixing portion 32. The first connecting wall Rf1 has an engagement hole ch that penetrates between its inner surface and outer surface (see FIG. 12(A)).

[0095] One of the wall surfaces (one of the second walls f2) constituting the first fixing portion 32, one of the wall surfaces (one of the second walls f2) constituting the second fixing portion 33, and the fifth connecting wall RF5 of the connecting portion 35 are on the same plane and are continuous, forming a T-shaped continuous surface (see Figure 13 (A)).

[0096] <Connecting member 36> The connecting member 36 is a member connected to the connecting portion 35. Specifically, the connecting member 36 is a member having a cylindrical structure having a first connecting wall 36a, which is a plate-shaped wall, and a pair of second connecting walls 36b, 36b continuous with the first connecting wall 36a. The pair of second connecting walls 36b, 36b are plate-shaped walls perpendicular to the first connecting wall 36a, and are formed so that the distance L1 between their outer surfaces is approximately the same as (or slightly smaller than) the distance L2 between the inner surfaces of the third connecting wall Rf3 and the fourth connecting wall Rf4 (i.e., the distance L2 between the opposing surfaces). In addition, the connecting member 36 has a third connecting wall 36c continuous with one of the second connecting walls 36b, 36b. The third connecting wall 36c is a plate-shaped wall perpendicular to one of the second connecting walls 36b. A connecting protrusion 36p is provided at one end (the lower end in FIG. 13(A)) of each of the pair of second connecting walls 36b, 36b. The connecting protrusion 36p is a protrusion that is engaged with the engaging hole ch of the above-mentioned first coupling wall Rf1, and is formed to a size that allows it to be inserted into the engaging hole ch.

[0097] Since the connecting portion 35 and the connecting member 36 have the above-mentioned shapes, as shown in Fig. 11 and Fig. 12(B), the connecting member 36 is arranged so that the outer surface of the third connecting wall 16c is in surface contact with the fifth connecting wall Rf5, and the outer surfaces of the pair of second connecting walls 36b, 36b are in almost surface contact with the inner surfaces of the third connecting wall Rf3 and the fourth connecting wall Rf4. From this state, the pair of connecting protrusions 36p, 36p of the pair of second connecting walls 36b, 36b are inserted into the pair of engagement holes ch, ch of the first connecting wall Rf1. Then, when the third connecting wall Rf3 and the fourth connecting wall Rf4 of the connecting portion 35 of the main body member 31 are connected to the pair of second connecting walls 36b, 36b of the connecting member 36, the connecting member 36 can be fixed to the connecting portion 35. As a result, the third connecting wall Rf3, the fourth connecting wall Rf4 and the fifth connecting wall Rf5 of the connecting portion 35 and the first connecting wall 16a of the connecting member 16 can form a third fixing portion 34 having an approximately rectangular cross-section, that is, a shape substantially equivalent to the first and second fixing portions 32, 33.

[0098] As described above, the relay fitting 30 is made up of two members, the main body member 31 and the connecting member 36, and can be formed simply by connecting these two members, so that the relay fitting 30 can be easily formed.

[0099] Moreover, both the main body member 31 and the connecting member 36 can be formed simply by processing a single plate-like member into a predetermined shape and bending it by pressing or the like to form holes. This allows the main body member 31 and the connecting member 36 to be easily formed while maintaining high processing precision. As described above, the main body member 31 and the connecting member 36 may be formed by bending the plate material and then drilling holes, but they may also be formed by forming holes in the plate material and then bending it.

[0100] More specifically, the main body member 31 has first and second fixing portions 32, 33 each formed of the first wall f1, a pair of second walls f2, f2, and a third wall f3 as described above, and the fifth connecting wall Rf5 of the connecting portion 35 is formed as a wall surface continuous with one of the second walls W2 of the first fixing portion 32 and one of the second walls W2 of the second fixing portion 13, and the first connecting wall Rf1 of the connecting portion 35 is also formed as a wall surface continuous with the first wall W1 of the first fixing portion 32 and the first wall W1 of the second fixing portion 32. The third connecting wall Rf3 and the fourth connecting wall Rf4 are formed as wall surfaces continuous with the fifth connecting wall Rf5. Therefore, the main body member 31 can be formed simply by processing a single plate material into an unfolded shape of the first and second fixing portions 32, 33 and the connecting portion 35, and bending the plate material at the portions that become the side edges between the first wall f1 and the pair of second walls f2, f2 of the first and second fixing portions 32, 33, the portions that become the side edges between the second wall f2 and the third wall f3, and the portions that become the side edges between the third connecting wall Rf3 and the fourth connecting wall Rf4 and the fifth connecting wall Rf5. Therefore, the main body member 31 can be easily formed while maintaining a high processing accuracy of the main body member 31.

[0101] Moreover, the connecting member 36 can be formed by simply processing a single plate material into an expanded shape of the first connecting wall 36a, the pair of second connecting walls 36b, 36b, and the third connecting wall 36c of the connecting member 36, and bending the portion that will become the side edge between the first connecting wall 36a and the pair of second connecting walls 36b, 36b, and the portion that will become the side edge between one of the second connecting walls 36b and the third connecting wall 36c. Therefore, the connecting member 36 can be easily formed while maintaining a high processing accuracy of the connecting member 36.

[0102] <Regarding main body member 31> In the above example, the three fixing parts 32, 33, 34 of the main body member 31 are formed in a cylindrical shape with a rectangular cross section, but the shapes of the three fixing parts 32, 33, 34 do not necessarily have to be rectangular in cross section, and may be any shape that can be formed by bending a single plate-like member. For example, the first fixing part 32 and the second fixing part 33 may be formed in a triangular cross section having a first wall f1 and a second wall f2 that are perpendicular to each other, and an inclined wall that connects the first wall f1 and the second wall f2.

[0103] <Regarding the third fixing portion 34> In the above example, the case where the connecting member 36 is provided and fixed to the connecting portion 35 to form the third fixed portion 34 has been described, but the connecting member 36 does not necessarily have to be provided. In the above example, the connecting portion 15 has the third connecting wall Rf3 and the fourth connecting wall Rf4, but the third connecting wall Rf3 and the fourth connecting wall Rf4 do not necessarily have to be provided. In this case, it is sufficient that the pair of second connection walls 36b, 36b of the connecting member 36 have the same function as the third connecting wall Rf3 and the fourth connecting wall Rf4 of the connecting portion 15 described above when the connecting portion 35 and the connecting member 36 are connected.

[0104] <Regarding shaft-shaped members 24 and 25> In the above example, the shaft-shaped members 24, 25 are described as being formed in a cylindrical shape with a rectangular cross section, but similar to the shaft-shaped members 22-23, the shaft-shaped members 24, 25 need only be formed in a shape that allows the other end of the first fixing portion 32 and the other end of the second fixing portion 33 of the connecting portion 35 to be inserted through their openings, and do not necessarily have to be formed in a cylindrical shape.

[0105] <Relay bracket 40> Next, the relay fitting 40 will be described. 14 to 16, the relay metal fitting 40 is a member formed in a generally cylindrical shape and has a configuration substantially similar to that of the first fixing portion 32 and the second fixing portions 33 and 34 of the relay metal fitting 30. The relay metal fitting 40 has a flat plate-like first wall 40a and a pair of second walls 40b, 40b each continuing with a pair of side edges of the first wall 40a and each provided so that its surface is perpendicular to the surface of the first wall 40a. The relay metal fitting 40 also has a third wall 40c which is continuous with a side edge of one of the pair of second walls 40b, 40b that is not continuous with the first wall 40a and is provided so that its surface is perpendicular to the surface of the one second wall 40b.

[0106] Since the relay metal fitting 40 has the shape described above, it can be easily formed. In other words, the relay metal fitting 40 can be formed simply by processing a single plate-like member into a predetermined shape and bending it by pressing or the like to form holes, so that the relay metal fitting 40 can be easily formed while maintaining high processing precision. Note that the relay metal fitting 40 may be formed by bending the plate material and then drilling holes as described above, but it may also be formed by forming holes in the plate material and then bending it.

[0107] <<Third embodiment>> Below are described the configuration of frame 1C used to form platform doors installed on platforms, the configurations and manufacturing methods of joint members 50, 60, 70, and 80 suitable for use with frame 1C, and a method for assembling frame 1C using each of the joint members 50, 60, 70, and 80. Frame 1C is a steel framework for forming platform doors.

[0108] <Frame 1C of Third Embodiment> In the frame 1 of the first embodiment and the frame 1B of the second embodiment, a configuration has been described in which the shaft-shaped members are connected using a corner member 10 having three mutually orthogonal fixing parts (first fixing part 12, second fixing part 13, third fixing part 14), but a configuration in which multiple shaft-shaped members are connected using frame metal fittings extending in two directions can also be adopted. Below, an example of a frame 1C (frame 1C of the third embodiment) in which multiple shaft-shaped members are connected using frame metal fittings (joint members 50, 60, 70, 80) having a shape different from that of the first and second embodiments will be described.

[0109] As shown in FIG. 19 and FIG. 20, the frame 1C of the third embodiment is formed using four joint members 50, 60, 70, and 80. The frame 1C of the third embodiment has a structure different from the above-mentioned frames 1 and 1B in the following respects. That is, the frame 1C of the third embodiment is different from the frames 1 and 1B of the first and second embodiments in that it uses planar joint members 50, 60, 70, and 80 that extend in two axial directions, rather than a structure in which shaft-shaped members extending in three axial directions are connected using a corner member 10 having three mutually orthogonal fixing parts. That is, the frame 1C of the third embodiment is different from the frames 1 and 1B of the first and second embodiments in the following two respects. First, the frame 1C of the third embodiment is different from the frames 1 and 1B of the first and second embodiments in that the frame is formed in a planar manner by connecting shaft-shaped members in a planar manner. In addition, each of the joint members 50, 60, 70, 80 does not complete the corner member 10 or the relay fitting 30 by connecting the connecting members 16, 36 to the connecting portion to form a third fixed portion, but can be used as a frame fitting in its own right, which differs from the frames 1, 1B.

[0110] The joint members 50, 60, 70, and 80 are members that connect shaft-shaped members, etc. by inserting the fixing portion into the inside of an adjacent shaft-shaped member, etc., and are configured to be covered by the shaft-shaped member, relay member, etc. so that the inserted portion (fixing portion) is difficult to see from the outside, as shown in Figures 17 and 18.

[0111] <Unit> As shown in Figures 17 and 18, frame 1C is formed by interconnecting a number of units A, B, C, D1, D2, E, F, and G (hereinafter referred to as "units A to G"). All of units A to G can be formed by simply processing a plate-like member (steel plate) into a predetermined shape, bending it by pressing or the like, and forming a number of holes at predetermined positions. These holes are for connecting adjacent units with screws or bolts. Note that these holes may be drilled after bending the plate material as described above, but they may also be formed before bending the plate material.

[0112] <Joint members 50, 60, 70, 80> The joint member 50 is a third embodiment of a frame fitting, the joint member 60 is a fourth embodiment of a frame fitting, the joint member 70 is a fifth embodiment of a frame fitting, and the joint member 80 is a sixth embodiment of a frame fitting. All of these joint members 50, 60, 70, 80 are frame fittings having first fixing portions 52, 62, 72, 82 and second fixing portions 53, 63, 73, 83 whose axial directions are perpendicular to or parallel to the axial directions of the first fixing portions 52, 62, 72, 82. Each of the joint members 50, 60, 70, 80 is a member formed by bending a single plate material, and includes a main body member 51, 61, 71, 81 having a first fixing portion 52, 62, 72, 82 in which adjacent wall surfaces are continuous by bending the plate material into a cylindrical shape, and a second fixing portion 53, 63, 73, 83 in which adjacent wall surfaces are continuous and perpendicular to each other by bending the plate material. In the joint members 50, 60, 70, 80, at least one wall surface constituting the first fixing portion 52, 62, 72, 82 and one wall surface constituting the second fixing portion 53, 63, 73, 83 are on the same plane and continuous.

[0113] <Unit A> As shown in Fig. 21, unit A is composed of joint member 50, shaft-shaped member 58, and relay member 59. Each of these members is formed by bending a single plate-shaped member. Shaft-shaped member 58 has openings at the top and bottom, and unit A is formed by inserting second fixing portion 53 of joint member 50 into the upper opening for connection, and inserting upper side 59a of relay member 59 into the lower opening for connection. Any method can be used to connect joint member 50, shaft-shaped member 58, and relay member 59, and they can be connected by screws or bolts, for example. The first fixing portion 52 of the joint member 50 is a connecting portion that is connected to the adjacent unit G, and the lower side 59b of the relay member 59 is a connecting portion that is connected to the adjacent unit B. Next, the configurations of the joint member 50, the shaft member 58, and the relay member 59 which constitute the unit A will be described.

[0114] <Joint member 50> As shown in FIG. 21, the joint member 50 is a member including a main body member 51 having two fixing portions 52, 53, namely, a first fixing portion 52 and a second fixing portion 53 whose axial direction is perpendicular to the axial direction of the first fixing portion 52.

[0115] <First fixed part 52> The first fixing portion 52 is a portion formed in a substantially cylindrical shape, and includes a first wall f1, a pair of second walls f2, f2, and a pair of third walls f3, f3. The first wall f1, the pair of second walls f2, f2, and the pair of third walls f3, f3 are all wall surfaces extending along the axial direction of the first fixing portion 52 that are provided in parallel with the axial direction of the first fixing portion 52, and adjacent wall surfaces are provided so as to be continuous with and perpendicular to each other. More specifically, the pair of second walls f2, f2 of the first fixing portion 52 are provided such that one side edge parallel to the axial direction of the first fixing portion 52 is continuous with a pair of side edges of the first wall f1 that are parallel to the axial direction of the first fixing portion 52, and the surface of the second wall f1 is perpendicular to the surface of the first wall f1. The pair of third walls f3, f3 are provided such that one side edge parallel to the axial direction of the first fixing portion 52 is continuous with the side edge of the pair of second walls f2, f2 that is not continuous with the first wall f1, and the surface of the third walls f3, f2 is perpendicular to the surface of the second walls f2, f2.

[0116] <Second fixed part 53> The second fixing portion 53 is a portion provided so that its axial direction is perpendicular to the axial direction of the first fixing portion 52, and is composed of an upper portion 53a having a U-shaped cross section connected to the first fixing portion 52, and a lower portion 53b having an L-shaped cross section extending downward from the upper portion 53a. The upper portion 53a of the second fixing portion 53 includes a first wall f1 and a pair of second walls f2, f2. The first wall f1 and the pair of second walls f2, f2 of the second fixing portion 53 are both wall surfaces extending along the axial direction of the second fixing portion 53 that are provided parallel to the axial direction of the second fixing portion 53, and adjacent wall surfaces are provided so as to be continuous and perpendicular to each other. More specifically, the pair of second walls f2, f2 of the second fixed portion 53 are arranged such that one side edge parallel to the axial direction of the second fixed portion 53 is continuous with a pair of side edges in the first wall f1 that are parallel to the axial direction of the second fixed portion 53, and the surface thereof is perpendicular to the surface of the first wall f1. Of the pair of second walls f2, f2 of the second fixing portion 53, the wall f2 continuing to the first wall f1 of the first fixing portion 52 has a height dimension set to the same length as the first wall f1 of the first fixing portion 52, and is provided with two connection holes. On the other hand, the other wall f2 has a height dimension set to be longer than the first wall f1 of the first fixing portion 52, and is provided with a total of five connection holes. In other words, the lower portion 53b of the second fixing portion 53 is formed by one wall f2 and the first wall f1.

[0117] One wall surface f1 constituting the first fixed portion 52 and one wall surface f2 constituting the second fixed portion 53 are on the same plane and are continuous, forming a continuous I-shaped surface (as shown in Figure 21 (A) , wall surface f1 of the first fixed portion 52 and wall surface f2 constituting the upper portion 53a of the second fixed portion 53 are on the same plane and are continuous, forming a continuous I-shaped surface extending laterally). The joint member 50 is a corner member, so to speak, that is arranged at a corner of the frame 1C and has an L-shape in side view. The upper end of the second fixing portion 53 is arranged so as not to protrude beyond the upper surface of the first fixing portion 52 (the upper wall surface of the pair of second walls f2, f2 of the first fixing portion 52), while the lower end of the second fixing portion 53 is arranged so as to protrude beyond the lower surface of the first fixing portion 52 (the lower wall surface of the pair of second walls f2, f2 of the first fixing portion 52). It should be noted that the joint member 50 does not have any portion corresponding to the connecting portion or third fixing portion of the corner member 10.

[0118] The joint member 50 can be formed simply by processing a single plate-like member into a predetermined shape and bending it by pressing or the like to form holes, and can be easily formed while maintaining high processing precision. Although the joint member 50 may be formed by bending the plate material and then drilling holes as described above, it may also be formed by forming holes in the plate material and then bending it.

[0119] More specifically, the wall surfaces of the first and second fixing portions 52, 53 of the main body member 51 are continuous, and a single plate material is processed into a shape in which the first fixing portion 52 and the second fixing portion 53 are developed. Next, the first fixing portion 52 can be formed by simply bending the plate material at right angles in the following order: a portion that will become a side edge between the first wall f1 of the first fixing portion 52 and a pair of second walls f2, f2 of the first fixing portion 52, and a portion that will become a side edge between the pair of second walls f2, f2 of the first fixing portion 52 and a pair of third walls f3, f3 of the first fixing portion 52, using the wall surface f1 of the first fixing portion 52 and one wall surface f2 of the second fixing portion 53, which are on the same plane and are I-shaped continuous surfaces. The second fixing portion 52 can be formed by simply bending the plate material at right angles in the following order: a portion that will become a side edge between the first wall f1 of the second fixing portion 53 and the second wall f2 forming the continuous surface, and a portion that will become a side edge between the first wall f1 of the second fixing portion 53 and the other second wall f2 of the second fixing portion 53, using the I-shaped continuous surface as a base. Therefore, the main body member 51 can be easily formed while maintaining a high processing accuracy of the main body member 51.

[0120] <Shaft-shaped member 58> The shaft-shaped member 58 is composed of a main body 58a bent into a square tube shape (a square cross section) and an upper end 58b formed into a U-shaped cross section, and includes a first wall W1, a pair of second walls W2, W2, and a third wall W3. The first wall W1, the pair of second walls W2, W2, and the third wall W3 are all wall surfaces extending along the axial direction of the shaft-shaped member 58, and are provided so that adjacent wall surfaces are continuous with each other and perpendicular to each other. More specifically, the upper end 58b of the shaft-shaped member 58 has a shape in which the third wall W3 is cut out in accordance with the height dimension of the first fixing portion 52 of the joint member 50, and is composed of only the first wall W1 and a pair of second walls W2, W2. The first fixing portion 52 is inserted into this cutout portion 58c, and the joint member 50 is fitted into the upper end opening of the shaft-shaped member 58 to be connected.

[0121] <Relay component 59> The relay member 59 is a member for relaying that is bent into a U-shape in cross section, and includes a first wall W1 and a pair of second walls W2, W2. The first wall W1 and the pair of second walls W2, W2 are both wall surfaces that extend along the axial direction of the relay member 59, and are provided so that adjacent wall surfaces are continuous with each other and perpendicular to each other. The relay member 59 is inserted into the inside of the shaft-shaped member 58 and is formed with a dimension such that it is inscribed on the wall surfaces W1 and W2 of the shaft-shaped member 58.

[0122] Both the shaft-shaped member 58 and the relay member 59 can be formed simply by processing a single plate-shaped member into a predetermined shape and bending it by pressing or the like to form holes, and can be easily formed while maintaining high processing precision. Note that the shaft-shaped member 58 and the relay member 59 may be formed by bending the plate material and then drilling holes as described above, but they may also be formed by forming holes in the plate material and then bending it.

[0123] <Unit B> As shown in FIG. 22, the unit B is composed of joint members 60 and 70, and shaft-shaped members 68 and 69. Each of these members is formed by bending a single plate-shaped member. The second fixing portion 63 extending upward of the joint member 60 is inserted into the lower opening of the shaft-shaped member 68 to connect them, the third fixing portion 64 extending downward is inserted into the upper opening of the shaft-shaped member 69 to connect them, and the second fixing portion 73 extending upward of the joint member 70 is connected to the lower opening of the shaft-shaped member 69 to form the unit B. The joint members 60 and 70 and the shaft-shaped members 68 and 69 may be connected by any method, for example, by screws or bolts. The first fixing portion 62 of the joint member 60 is a connecting portion that is connected to unit D1, the first fixing portion 72 of the joint member 70 is a connecting portion that is connected to unit D2, and the upper end opening of the shaft-shaped member 68 is a connecting portion that is connected to the relay member 59 of unit A. Next, the configurations of the joint members 60, 70 and the shaft members 68, 69 that constitute the unit B will be described.

[0124] <Joint member 60> 22, the joint member 60 is a member including three fixing portions 62, 63, and 64, that is, a first fixing portion 62, and second and third fixing portions 63 and 64 provided such that their axial directions are perpendicular to the axial direction of the first fixing portion 62. The second fixing portion 63 and the third fixing portion 64 are both arranged coaxially and parallel to each other, forming a portion that extends linearly, so to speak.

[0125] <First fixed part 62> The first fixing portion 62 is a portion formed in a U-shaped cross section, and includes a first wall f1 and a pair of second walls f2, f2. The first wall f1 and the pair of second walls f2, f2 are both wall surfaces extending along the axial direction of the first fixing portion 62, which is provided in parallel with the axial direction of the first fixing portion 62, and adjacent wall surfaces are provided so as to be continuous with and perpendicular to each other. More specifically, a pair of second walls f2, f2 of the first fixed portion 62 are arranged such that one side edge parallel to the axial direction of the first fixed portion 62 is continuous with a pair of side edges in the first wall f1 that are parallel to the axial direction of the first fixed portion 62, and the surface thereof is perpendicular to the surface of the first wall f1.

[0126] <Second fixed part 63> The second fixed portion 63 is a portion formed in a cylindrical shape, and is provided so that its axial direction is perpendicular to the axial direction of the first fixed portion 62. The second fixed portion 63 includes a first wall f1, a pair of second walls f2, f2, and a third wall f3. The first wall f1, the pair of second walls f2, f2, and the third wall f3 of the second fixed portion 63 are all wall surfaces extending along the axial direction of the second fixed portion 63 that are provided in parallel with the axial direction of the second fixed portion 63, and are provided so that adjacent wall surfaces are continuous with and perpendicular to each other. More specifically, the pair of second walls f2, f2 of the second fixing portion 63 are provided such that one side edge parallel to the axial direction of the second fixing portion 63 is continuous with a pair of side edges of the first wall f1 parallel to the axial direction of the second fixing portion 63, and the surface thereof is perpendicular to the surface of the first wall f1. The third wall f3 is provided such that one side edge parallel to the axial direction of the second fixing portion 63 is continuous with a side edge of one of the second walls f2 that is not continuous with the first wall f1, and the surface thereof is perpendicular to the surface of one of the second walls f2.

[0127] <Third fixed part 64> The third fixed portion 64 is a portion formed in a cylindrical shape, and is provided so that its axial direction is perpendicular to the axial direction of the first fixed portion 62, and is disposed parallel (coaxially) to the axial direction of the second fixed portion 63. This third fixed portion 64 has a wall surface and configuration equivalent to those of the second fixed portion 63, and therefore common reference numerals are used and description thereof will be omitted.

[0128] One wall surface f1 constituting the first fixing portion 62, one wall surface f2 constituting the second fixing portion 63, and one wall surface f2 constituting the third fixing portion 64 are on the same plane and are continuous, forming a T-shaped continuous surface. In addition, a pair of wall surfaces (f2, f2) constituting the first fixing portion 62 and a pair of wall surfaces (f2, f2) constituting the second fixing portion 63 are also on the same plane and are continuous. The joint member 60 is a relay member, so to speak, that connects the axial members 68, 69 and the unit D1, and has a T-shape when viewed from the side. Unlike the corner member 10 in which the three fixing portions 12, 13, 14 extend in three axial directions perpendicular to each other, the axial direction of the second fixing portion 63 and the axial direction of the third fixing portion 64 are parallel to and on the same axis.

[0129] The joint member 60 is formed with a dimension such that when the first fixing portion 61 is inserted inside the shaft-shaped member 911 of the unit D1, the joint member 60 is inscribed in each wall surface of the shaft-shaped member 911. When the second fixing portion 63 is inserted inside the shaft-shaped member 68, the joint member 60 is formed with a dimension such that the joint member 60 is inscribed in the wall surfaces W1, W2, W2, and W3 of the shaft-shaped member 68. Similarly, when the third fixing portion 64 is inserted inside the shaft-shaped member 69, the joint member 60 is formed with a dimension such that the joint member 60 is inscribed in the wall surfaces W1, W2, W2, and W3 of the shaft-shaped member 69.

[0130] The joint member 60 can be formed simply by processing a single plate-like member into a predetermined shape and bending it by pressing or the like to form holes, and can be easily formed while maintaining high processing precision. The joint member 60 may be formed by bending the plate material and then drilling holes as described above, but it may also be formed by bending the plate material after forming the holes.

[0131] More specifically, in main body member 61, the wall surfaces of fixing portions 62, 63, 64 are continuous, and a single plate material is processed into a shape in which first fixing portion 62, second fixing portion 63 and third fixing portion 64 are developed. Next, the first fixing portion 62 can be formed by simply bending the plate material at a portion that becomes a side edge between the first wall f1 and the pair of second walls f2, f2 of the first fixing portion 62, using the wall surface f1 of the first fixing portion 62, one wall surface f2 of the second fixing portion 63, and one wall surface f2 of the third fixing portion 64, which are on the same plane and form a T-shaped continuous surface. The second fixing portion 63 and the third fixing portion 64 can be formed by simply bending the plate material at a portion that becomes a side edge between the second wall f2 and the third wall f3 of the second fixing portion 53 that forms the T-shaped continuous surface, a portion that becomes a side edge between the second wall f2 and the first wall f1 of the second fixing portion 53 that forms the continuous surface, and a portion that becomes a side edge between the second wall f2 and the first wall f1 of the second fixing portion 53 that does not form the continuous surface, using the T-shaped continuous surface as a base. In this manner, by successively bending the plate material at right angles, the main body member 61 can be easily formed while maintaining high machining precision of the main body member 61.

[0132] <Joint member 70> As shown in FIG. 22, the joint member 70 is a member having two fixing portions 72, 73, namely, a first fixing portion 72 and a second fixing portion 73 arranged so that the axial direction is perpendicular to the axial direction of the first fixing portion 72.

[0133] <First fixed part 72> The first fixing portion 72 is a portion formed in a substantially cylindrical shape, and includes a first wall f1, a pair of second walls f2, f2, and a third wall f3. The first wall f1, the pair of second walls f2, f2, and the third wall f3 are all wall surfaces extending along the axial direction of the first fixing portion 72 that are provided in parallel with the axial direction of the first fixing portion 72, and are provided so that adjacent wall surfaces are continuous with and perpendicular to each other. More specifically, the pair of second walls f2, f2 of the first fixing portion 72 are provided such that one side edge parallel to the axial direction of the first fixing portion 72 is continuous with a pair of side edges of the first wall f1 parallel to the axial direction of the first fixing portion 72, and the surface thereof is perpendicular to the surface of the first wall f1. The third wall f3 is provided such that one side edge parallel to the axial direction of the first fixing portion 72 is continuous with a side edge of one of the second walls f2 that is not continuous with the first wall f1, and the surface thereof is perpendicular to the surface of one of the second walls f2.

[0134] <Second fixed part 73> The second fixing portion 73 is a portion formed in a substantially cylindrical shape, and includes a first wall f1, a pair of second walls f2, f2, and a third wall f3. The first wall f1, the pair of second walls f2, f2, and the third wall f3 are all wall surfaces extending along the axial direction of the second fixing portion 73 and provided in parallel with the axial direction of the second fixing portion 73, and adjacent wall surfaces are provided so as to be continuous with and perpendicular to each other. More specifically, the pair of second walls f2, f2 of the second fixing portion 73 are provided such that one side edge parallel to the axial direction of the second fixing portion 73 is continuous with a pair of side edges of the first wall f1 parallel to the axial direction of the second fixing portion 73, and the surface thereof is perpendicular to the surface of the first wall f1. The third wall f3 is provided such that one side edge parallel to the axial direction of the second fixing portion 73 is continuous with a side edge of one of the second walls f2 that is not continuous with the first wall f1, and the surface thereof is perpendicular to the surface of one of the second walls f2.

[0135] One wall surface constituting the first fixing portion 72 (wall surface f2 continuous with wall surface f3) and one wall surface constituting the second fixing portion 73 (wall surface f2 continuous with wall surface f3) are on the same plane and are continuous, being an L-shaped continuous surface. The joint member 70 is a corner member, so to speak, that is arranged at a corner of the frame 1C and has an L-shape when viewed from the side. The lower end of the second fixing portion 73 does not protrude beyond the lower surface (f1) of the first fixing portion 72, while the upper end of the second fixing portion 73 protrudes beyond the upper surface (f3) of the first fixing portion 72. It should be noted that the joint member 70 does not have any portion corresponding to the connecting portion or the third fixing portion.

[0136] The joint member 70 can be formed simply by processing a single plate-like member into a predetermined shape and bending it by pressing or the like to form holes, and can be easily formed while maintaining high processing precision. Although the joint member 70 may be formed by bending the plate material and then drilling holes as described above, it may also be formed by forming holes in the plate material and then bending it.

[0137] More specifically, the wall surfaces of the first and second fixing portions 72, 73 of the main body member 71 are continuous, and a single plate material is processed into a shape in which the first fixing portion 72 and the second fixing portion 73 are developed. Next, for the first fixed portion 72, using one wall surface f2 of the first fixed portion 72 and one wall surface f2 of the second fixed portion 73, which are on the same plane and form a continuous L-shaped surface, as a base, the plate material is successively bent at right angles at the portion that will become the side edge between the first wall f1 of the first fixed portion 72 and the second wall f2 that is used as the base, the portion that will become the side edge between the third wall f3 of the first fixed portion 72 and the second wall f2 that is used as the base, and the portion that will become the side edge between the first wall f1 of the first fixed portion 72 and the second wall f2 that is not used as the base. Similarly, for the second fixed portion 73, one wall surface f2 of the first fixed portion 72 and one wall surface f2 of the second fixed portion 73, which are on the same plane and are continuous L-shaped surfaces, are used as a base, and the plate material is successively bent at right angles at a portion that forms the side edge between the first wall f1 of the second fixed portion 73 and the second wall f2 that is used as the base, a portion that forms the side edge between the third wall f3 of the second fixed portion 73 and the second wall f2 that is used as the base, and a portion that forms the side edge between the first wall f1 of the second fixed portion 73 and the second wall f2 that is not used as the base. This allows the main body member 71 to be easily formed while maintaining high machining accuracy of the main body member 71.

[0138] <Shaft-shaped member 68> The shaft-shaped member 68 is composed of a main body 68a bent into a square tube shape and a lower end 68b formed into a U-shaped cross section, and includes a first wall W1, a pair of second walls W2, W2, and a third wall W3. The first wall W1, the pair of second walls W2, W2, and the third wall W3 are all wall surfaces extending along the axial direction of the shaft-shaped member 68, and are provided so that adjacent wall surfaces are continuous and perpendicular to each other. More specifically, the lower end 68b of the shaft-shaped member 68 has a shape in which the third wall W3 is cut out in accordance with the height dimension of the first fixing portion 62 of the joint member 60, and is composed of only the first wall W1 and a pair of second walls W2, W2. The second fixing portion 63 is inserted into this cutout portion 68c, and the joint member 60 is fitted in and connected to the shaft-shaped member 68 from the lower end opening.

[0139] <Shaft-shaped member 69> The shaft-shaped member 69 has a similar structure to the shaft-shaped member 68, except that it is shorter, and is composed of a main body 69a bent into a square tube shape and a lower end 69b formed into a U-shaped cross section, and includes a first wall W1, a pair of second walls W2, W2, and a third wall W3. The first wall W1, the pair of second walls W2, W2, and the third wall W3 are all wall surfaces extending along the axial direction of the shaft-shaped member 69, and are provided so that adjacent wall surfaces are continuous and perpendicular to each other. More specifically, the lower end 69b of the shaft-shaped member 69 has a shape in which the third wall W3 is cut out in accordance with the height dimension of the first fixing portion 72 of the joint member 70, and is composed of only the first wall W1 and a pair of second walls W2, W2. The second fixing portion 73 is inserted into this cutout portion 69c, and the joint member 70 is fitted in from the lower end opening of the shaft-shaped member 69 to be connected.

[0140] The third fixing portion 64 of the joint member 60 is inserted into the upper end opening of the shaft-shaped member 69. The first fixing portion 62 of the joint member 60 and the first fixing portion 72 of the joint member 70 are portions that are connected to the units D1 and D2, respectively. Therefore, the joint members 60 and 70 are inserted into the shaft-shaped members 68 and 69 and connected so that the fixing portions 62 and 72 are disposed toward the units D1 and D2, respectively.

[0141] The shaft members 68, 69 can each be formed simply by processing a single plate member into a predetermined shape and bending it by pressing or the like to form holes, and can be formed easily while maintaining high processing precision. The joint member 80 may be formed by bending the plate material and then drilling holes, as described above, or it may be formed by forming holes in the plate material and then bending it.

[0142] <Unit C> 23, unit C is composed of joint members 60 and 80, shaft-shaped members 85, 86, 87, 88 and 89, and protruding fitting 79. Shaft-shaped member 85 is disposed in the horizontal direction, and shaft-shaped members 86 to 89 are disposed in the vertical direction. Each of these members is formed by bending a single plate-shaped member. The unit C can be formed as follows. First, the first fixing portion 62 extending laterally of the joint member 60 is inserted into one side end opening 85a of the shaft-shaped member 85 to connect them. Next, the second fixing portion 63 extending upward of the joint member 60 is inserted into the lower opening of the shaft-shaped member 86 to connect them, and the third fixing portion 64 extending downward of the joint member 60 is inserted into the upper opening of the shaft-shaped member 87 to connect them. Also, the first fixing portion 82 extending laterally of the joint member 80 is inserted into the other side end opening 85b of the shaft-shaped member 85 to connect them, and the second fixing portion 83 extending upward of the joint member 80 is inserted into the lower opening of the shaft-shaped member 88 to connect them. Then, the third fixing portion 84 extending downward of the joint member 80 is inserted into the upper opening of the shaft-shaped member 89 to connect them, and further, the protruding fitting 79 is connected and fixed to the wall surface f3 that is continuous with the second fixing portion 83 and the third fixing portion 84, thereby forming the unit C. The joint members 60 and 80, the shaft members 85, 86, 87, 88 and 89, and the protruding fitting 79 may be connected by any method, for example, by screws or bolts. Furthermore, when constructing the unit C, the order in which the members are connected is not limited to the order described above. The upper end openings of the shaft members 86 and 88 are connecting portions that are connected to the unit F. The lower openings of the shaft members 87 and 89 are connecting portions that are connected to the unit E. Next, we will explain the configuration of the joint member 80, the shaft-shaped members 86 to 89, and the protruding metal fitting 79. Note that the joint member 60 used in unit C and the joint member 60 used in unit B (FIG. 22) have the same configuration, so the explanation will be omitted.

[0143] <Joint member 80> 23 and 24, the joint member 80 is a member including three fixing portions 82, 83, and 84, that is, a first fixing portion 82, and second and third fixing portions 83 and 84 provided such that their axial directions are perpendicular to the axial direction of the first fixing portion 82. The second fixing portion 83 and the third fixing portion 84 are both arranged coaxially and parallel to each other, forming a portion that extends linearly, so to speak.

[0144] <First fixed part 82> The first fixing portion 82 is a portion formed in a U-shaped cross section, and includes a first wall f1 and a pair of second walls f2, f2. The first wall f1 and the pair of second walls f2, f2 are both wall surfaces extending along the axial direction of the first fixing portion 82, which is provided in parallel with the axial direction of the first fixing portion 82, and adjacent wall surfaces are provided so as to be continuous with and perpendicular to each other. More specifically, a pair of second walls f2, f2 of the first fixed portion 82 are arranged such that one side edge parallel to the axial direction of the first fixed portion 82 is continuous with a pair of side edges in the first wall f1 that are parallel to the axial direction of the first fixed portion 82, and the surface of the second wall f2, f2 is perpendicular to the surface of the first wall f1.

[0145] <Second fixed part 83> The second fixed portion 83 is a portion formed in a cylindrical shape, and is provided so that its axial direction is perpendicular to the axial direction of the first fixed portion 82. The second fixed portion 83 includes a first wall f1, a second wall f2, a third wall f3, a fourth wall f4, and a fifth wall f5. The first wall f1 to the fifth wall f5 of the second fixed portion 63 are all wall surfaces extending along the axial direction of the second fixed portion 83 that is provided in parallel with the axial direction of the second fixed portion 83, and are provided so that adjacent wall surfaces are continuous with and perpendicular to each other. More specifically, the second wall f2 and the third wall f3 of the second fixing portion 83 are provided such that one side edge parallel to the axial direction of the second fixing portion 83 is continuous with a pair of side edges of the first wall f1 parallel to the axial direction of the second fixing portion 83, and the surface of the wall f2 is perpendicular to the surface of the first wall f1. The fourth wall f4 is provided such that one side edge parallel to the axial direction of the second fixing portion 83 is continuous with a side edge of the second wall f2 that is not continuous with the first wall f1, and the surface of the wall f2 is perpendicular to the surface of the second wall f2. The fifth wall f5 is provided such that one side edge parallel to the axial direction of the second fixing portion 83 is continuous with a side edge of the third wall f3 that is not continuous with the first wall f1, and the surface of the wall f5 is perpendicular to the surface of the third wall f3.

[0146] <Third fixed part 84> Third fixed portion 84 is a portion formed in a cylindrical shape, and is provided so that its axial direction is perpendicular to the axial direction of first fixed portion 82, and is disposed parallel (coaxially) to the axial direction of second fixed portion 83. This third fixed portion 84 has a wall surface and configuration equivalent to those of second fixed portion 83, and therefore common reference numerals are used and description thereof will be omitted.

[0147] One wall surface f1 constituting the first fixing portion 82, one wall surface f1 constituting the second fixing portion 83, and one wall surface f1 constituting the third fixing portion 84 are on the same plane and are continuous, forming a T-shaped continuous surface. In addition, the wall surface f3 constituting the second fixing portion 83 and the wall surface f3 constituting the third fixing portion 84 are also on the same plane and are continuous. In addition, the wall surface f5 constituting the second fixing portion 83 and the wall surface f5 constituting the third fixing portion 84 are also on the same plane and are continuous. The joint member 80 is a relay member, so to speak, that connects the axial members 85, 88, and 89, and has a T-shape when viewed from the side. Unlike the corner member 10 in which the three fixing portions 12, 13, and 14 extend in three axial directions that are perpendicular to each other, the axial direction of the second fixing portion 83 and the axial direction of the third fixing portion 84 are parallel to and on the same axis.

[0148] The joint member 80 is formed with a dimension such that the first fixing portion 81 is inserted into the inside of the shaft-shaped member 85 and inscribed in the wall surface of the shaft-shaped member 85. The second fixing portion 83 is inserted into the inside of the shaft-shaped member 88 and inscribed in the wall surfaces W1 to W5 of the shaft-shaped member 88. Similarly, the third fixing portion 84 is inserted into the inside of the shaft-shaped member 89 and inscribed in the wall surfaces W1 to W5 of the shaft-shaped member 89.

[0149] The joint member 80 can be formed simply by processing a single plate-like member into a predetermined shape and bending it by pressing or the like to form holes, and can be easily formed while maintaining high processing precision. As described above, the joint member 80 may be formed by bending the plate material and then drilling holes, but it may also be formed by forming holes in the plate material and then bending it.

[0150] More specifically, in main body member 81, the wall surfaces of fixing portions 82, 83, 84 are continuous, and a single plate material is processed into a shape in which first fixing portion 82, second fixing portion 83 and third fixing portion 84 are developed. Next, using the wall surface f1 of the first fixing portion 82, the wall surface f1 of the second fixing portion 83, and the wall surface f1 of the third fixing portion 84, which are on the same plane and form a T-shaped continuous surface, as a base, the first fixing portion 82 is formed by bending the portion that becomes the side edge between the first wall f1 of the first fixing portion 82 and the pair of second walls f2, f2. In addition, the second fixing portion 83 and the third fixing portion 84 are bent at a portion that will be a side edge between the first wall f1 that is continuous between the second fixing portion 83 and the third fixing portion 84 and the third wall f3 that is continuous between the second fixing portion 83 and the third fixing portion 84, and then bent at a portion that will be a side edge between the third wall f3 that is continuous between the second fixing portion 83 and the third fixing portion 84 and the fifth wall f5 that is continuous between the second fixing portion 83 and the third fixing portion 84. In addition, after bending at a portion that will be a side edge between the second wall f2 and the fourth wall f4 of the second fixing portion 83, the third fixing portion 84 is bent at a portion that will be a side edge between the second wall f2 and the fourth wall f4 of the third fixing portion 84. In this way, the main body member 81 can be formed by successively bending the plate material at right angles. Therefore, the main body member 81 can be easily formed while maintaining high processing accuracy of the main body member 81.

[0151] <Shaft-shaped member 85> The shaft-shaped member 85 is a member bent into a square tube shape, with each wall surface extending along the axial direction and adjacent wall surfaces being continuous with and perpendicular to each other.

[0152] <Shaft-shaped member 86> The shaft-shaped member 86 is composed of a main body 86a bent into a square tube shape and a lower end 86b formed into a U-shaped cross section, and includes a first wall W1, a pair of second walls W2, W2, and a third wall W3. The first wall W1, the pair of second walls W2, W2, and the third wall W3 are all wall surfaces extending along the axial direction of the shaft-shaped member 86, and are provided so that adjacent wall surfaces are continuous with each other and perpendicular to each other. More specifically, the lower end 86b of the shaft-shaped member 86 has a shape in which the third wall W3 is cut out in accordance with the height dimension of the second fixing portion 63 of the joint member 60, and is composed of only the first wall W1 and a pair of second walls W2, W2. The second fixing portion 63 is inserted into this cutout portion 86c, and the joint member 60 is fitted in and connected to the shaft-shaped member 86 from the lower end opening.

[0153] <Axial member 87> The shaft-shaped member 87 is a member bent into a square tube shape, with each wall surface extending along the axial direction and adjacent wall surfaces being continuous with and perpendicular to each other.

[0154] <Shaft-shaped member 88> The shaft-shaped member 88 is composed of a main body 88a bent into a square tube shape and a lower end portion 88b formed into a U-shaped cross section, and has a first wall W1, a second wall W2, a third wall W3, a fourth wall W4, and a fifth wall W5. All of these walls W1 to W5 extend along the axial direction of the shaft-shaped member 88, and are provided so that adjacent walls are continuous with each other and perpendicular to each other. More specifically, the lower end 88b of the shaft-shaped member 88 has a shape in which the third wall W3 is cut out in accordance with the height dimension of the second fixing portion 83 of the joint member 80, and is made up of only the first wall W1, the second wall W2, the fourth wall W4 and the fifth wall W5. The first fixing portion 82 is inserted into this cutout portion 88c, and the joint member 80 is fitted into the lower end opening of the shaft-shaped member 88 to be connected.

[0155] <Shaft-shaped member 89> The shaft-shaped member 89 is a portion formed in a substantially cylindrical shape, and includes a first wall W1, a pair of second walls W2, W2, and a pair of third walls W3, W3. The first wall W1, the pair of second walls W2, W2, and the pair of third walls W3, W3 are all wall surfaces extending along the axial direction of the shaft-shaped member 89, and are provided so that adjacent wall surfaces are continuous with and perpendicular to each other. More specifically, the pair of second walls W2, W2 are provided such that one side edge parallel to the axial direction of the shaft-shaped member 89 is continuous with a pair of side edges of the first wall W1 parallel to the axial direction, and the surface thereof is perpendicular to the surface of the first wall W1. Also, the pair of third walls W3, W3 are provided such that one side edge parallel to the axial direction of the shaft-shaped member 89 is continuous with each of the side edges of the pair of second walls W2, W2, and the surface thereof is perpendicular to each of the surfaces of the second walls W2, W2.

[0156] <Protruding bracket 79> The protruding fitting 79 is the location where the platform door clamp is attached, and comprises a horizontally extending clamp accommodating portion 79a and a joint member attachment portion 79b.

[0157] The clamp accommodating portion 79a is composed of a first wall W1 and a pair of second walls W2, W2, and is formed by bending each of the portions that become the side edges between the first wall and the pair of second walls W2, W2 at right angles.

[0158] The joint member attachment portion 79b is a portion that is attached to the second wall W2 of the shaft-shaped members 88, 89, and is constituted by a third wall W3, a fourth wall W4 and a fifth wall W5. The third wall W3 is a surface continuous with one of the second walls W2 and is formed by bending it upward at a right angle. Similarly, the fourth wall W4 is a surface continuous with the other of the second walls W2 and is formed by bending it downward at a right angle. The fifth wall W5 is continuous with the first wall W1 and is formed by bending it at a right angle so as to form a mounting surface that contacts the wall surface f3 of the joint member 80 together with the third wall W3 and the fourth wall W4. After the shaft members 88, 89 are inserted into and connected to the joint member 80, the protruding fittings 79 are attached to predetermined positions on the second wall W2 of the shaft members 88, 89 (positions facing the wall surface f3 of the joint member 80).

[0159] <Units D1 and D2> 17 to 21, unit B and unit E are connected by rod-shaped units D1 and D2, respectively. Units D1 and D2 have substantially the same configuration, except that the number and positions of connecting holes are slightly different.

[0160] <Unit D1> 25(A), the unit D1 is composed of two shaft-shaped members 911 and 921, and a relay member 931. The shaft-shaped members 911 and 921 are arranged in the horizontal direction. Each of these members is formed by bending a single plate-shaped member. The unit D1 is constructed by inserting one end of a relay member 931 into an opening at one side end of the shaft-shaped member 911 to connect them, and inserting the other end of the relay member 931 into an opening at one side end of the shaft-shaped member 921 to connect them. Any connection method may be used, and the connection may be made by using screws or bolts, for example.

[0161] <Unit D2> 25(B), the unit D2 is composed of two shaft-shaped members 912, 922 and a relay member 932. The shaft-shaped members 912, 922 are arranged in the horizontal direction. Each of these members is formed by bending a single plate-shaped member. The unit D2 is constructed by inserting one end of a relay member 932 into an opening at one side end of the shaft-shaped member 912 to connect them, and inserting the other end of the relay member 932 into an opening at one side end of the shaft-shaped member 922 to connect them. Any connection method may be used, and the connection may be made by using screws or bolts, for example.

[0162] The relay members 931 and 932 have the same configuration as the relay member 59 (FIG. 21) used in the unit A, and therefore a description thereof will be omitted.

[0163] The first fixing portion 62 of the joint member 60 of unit B is inserted into the other side end opening of the shaft-shaped member 911 constituting unit D1 and connected. The first fixing portion 72 of the joint member 70 of unit B is inserted into the other side end opening of the shaft-shaped member 912 constituting unit D2 and connected. Also, the protruding portion 94d of unit E is inserted into the other side end opening of the shaft-shaped member 921 constituting unit D1 and connected. The protruding portion 94e of unit E is inserted into the other side end opening of the shaft-shaped member 922 constituting unit D2 and connected.

[0164] <Unit E> As shown in Fig. 19 and Fig. 20, the unit E is composed of a box-shaped main body 94a, protruding parts 94b and 94c protruding from the upper surface of the main body 94a, and protruding parts 94d and 94e protruding from the side surfaces. The protruding part 94b is a connecting part inserted into the lower opening of the shaft-shaped member 87 of the unit C, and is formed with a dimension that inscribes the wall surface of the shaft-shaped member 87 when inserted. The protruding part 94c is a connecting part inserted into the lower opening of the shaft-shaped member 89 of the unit C, and is formed with a dimension that inscribes the wall surface of the shaft-shaped member 89 when inserted. The protruding part 94d is a connecting part inserted into the side end opening of the shaft-shaped member 921 of the unit C1, and is formed with a dimension that inscribes the wall surface of the shaft-shaped member 921 constituting the unit C1 when inserted. The protruding portion 94e is a connecting portion that is inserted into the side end opening of the shaft-shaped member 922 of the unit C2, and is formed with a dimension that allows it to be inscribed in the wall surface of the shaft-shaped member 922 that constitutes the unit C2 when inserted.

[0165] <Unit F> As shown in Fig. 19 and Fig. 20, the unit E is composed of a horizontally disposed rectangular cylindrical main body 95a, protruding portions 95b, 95c protruding from the lower surface of the main body 95a, and a protruding portion 95d protruding from the side surface. The protruding portion 95b is a connecting portion inserted into the upper opening of the shaft-shaped member 88 of the unit C, and is formed with a dimension that inscribes the wall surfaces W1 to W5 of the shaft-shaped member 88 when inserted. The protruding portion 95c is a connecting portion inserted into the upper opening of the shaft-shaped member 86 of the unit C, and is formed with a dimension that inscribes the wall surfaces W1 to W3 of the shaft-shaped member 86 when inserted. The protruding portion 95d is a connecting portion inserted into the side end opening 96b of the shaft-shaped member 96 constituting the unit G, and is formed with a dimension that inscribes the wall surfaces of the shaft-shaped member 96 when inserted.

[0166] <Unit G> As shown in Figures 19 and 20, unit G is composed of a square cylindrical shaft member 96 arranged horizontally. One side end opening 96a of the shaft member 96 is a connecting portion into which the first fixing portion 52 of the joint member 50 of unit A is inserted. Also, one side end opening 96b of the shaft member 96 is a connecting portion into which the protruding portion 95d of unit F is inserted. The shaft member 96 is formed by bending a single plate-like member.

[0167] <Frame 1C Configuration> The frame 1C is a planar frame constructed by interconnecting the units A to G described above, and is constructed using the frame fittings (joint members 50, 60, 70, 80) according to the third to sixth embodiments. The first fixing portion 52 and the second fixing portion 53 of the joint member 50, the first fixing portion 62 and the second fixing portion 63 of the joint member 60, the first fixing portion 72 and the second fixing portion 73 of the joint member 70, and the first fixing portion 82 and the second fixing portion 83 of the joint member 80 are all arranged on the same plane. At least one of the first fixing portion or the second fixing portion of each of the joint members 50, 60, 70, 80 (in the third embodiment, the first fixing portion 52 and the second fixing portion 53 of the joint member 50, the first fixing portion 62, the second fixing portion 63, and the third fixing portion 64 of the joint member 60, the first fixing portion 72 and the second fixing portion 73 of the joint member 70, and the first fixing portion 82, the second fixing portion 83, and the third fixing portion 84 of the joint member 80) is connected to the cylindrical shaft members 58, 68, 69, 85-89, 911, 912, 921, 96 formed by bending a single plate material and arranged so that adjacent wall surfaces are continuous and perpendicular to each other, as described above. Note that a cylindrical relay member may be connected to each fixing portion. According to the frame 1C, the frame can be assembled simply by connecting these shaft-like members to the frame fittings (joint members 50, 60, 70, 80), which makes it easy to manufacture the frame. In addition, either the first fixing part or the second fixing part of the frame fittings (joint members 50, 60, 70, 80) is arranged so that its axial direction faces the vertical direction, and the other is arranged so that its axial direction faces the horizontal direction. Frame 1C can be used as a frame for a platform of a railway station. [Industrial Applicability]

[0168] The frame of the present invention is suitable as a frame for a switchboard, a platform, a storage rack, or a table. The frame metal fitting of the present invention is suitable as a metal fitting for assembling these frames. [Explanation of symbols]

[0169] 1 Frame (first embodiment) 1B Frame (second embodiment) 1C Frame (third embodiment) 10 Corner member (first embodiment) 11 Main body parts 12 First fixed part 13 Second fixed part 14 Third fixed part f1 first wall f2 second wall f3 third wall 15 Connecting part Rf1 First connecting wall Rf2 Second connection wall Rf3 third connecting wall Rf4 fourth connecting wall ch Engagement hole 16 Connecting members 16a First connecting wall 16b Second connecting wall 16c Third connecting wall 16d Fourth connecting wall 16p connection protrusion 21 Shaft-shaped member 21a Main body 21b Cover part 22 Shaft-shaped member 22a Main body 22b Cover part 23 Shaft-shaped member 23a Main body 23b Cover part 24 Shaft-shaped member 24a Main body 24b Cover part 25 Shaft-shaped member 25a Main body 25b Cover part W1 first wall W2 Second wall W3 third wall W4 Cover wall 30 Relay bracket (Second embodiment) 31 Main body parts 32 First fixed part 33 Second fixed part 34 Third fixed part 35 Connecting part ch Engagement hole 36 Connecting members 36a First connecting wall 36b Second connecting wall 36c Third connecting wall 36p Connection protrusion 40 Intermediate fitting 40a First wall 40b Second wall 40c third wall 50 Joint member (third embodiment) 58 Shaft-shaped member 59 Intermediate parts 60 Joint member (fourth embodiment) 68 Shaft-shaped member 69 Shaft-shaped member 70 Joint member (Fifth embodiment) 80 Joint member (sixth embodiment) 85 Shaft-shaped member 86 Shaft-shaped member 87 Shaft-shaped member 88 Shaft-shaped member 89 Shaft-shaped member 911 Shaft-shaped member 912 Shaft-shaped member 921 Shaft-shaped members 922 Shaft-shaped member 931 Intermediate parts 932 Intermediate parts 96 Shaft-shaped member

Claims

1. A frame fitting having a first fixing portion and a second fixing portion provided so that an axial direction of the second fixing portion is perpendicular to or parallel to the axial direction of the first fixing portion, The member is formed by bending a single plate material, and includes a main body member having a first fixing portion in which adjacent wall surfaces are continuous with each other by bending the plate material to form a cylindrical shape, and a second fixing portion in which adjacent wall surfaces are continuous with each other by bending the plate material, At least one wall surface constituting the first fixing portion and one wall surface constituting the second fixing portion are on the same plane and are continuous. A frame fitting characterized by:

2. A frame fitting including, in addition to the first fixing portion and the second fixing portion, a third fixing portion provided such that an axial direction thereof is perpendicular to an axial direction of the first fixing portion and an axial direction of the second fixing portion, the main body member has, in addition to the first fixed portion and the second fixed portion formed by bending a plate material into a cylindrical shape, a connecting portion located between the first fixed portion and the second fixed portion and connecting the first fixed portion and the second fixed portion, The connecting portion of the main body member is A connecting wall is parallel to both or one of the axial directions of the first fixing portion and the axial direction of the second fixing portion.

2. The frame metal fitting according to claim 1.

3. The body member includes: an axial direction of the first fixed portion and an axial direction of the second fixed portion are perpendicular to each other; The connecting wall of the connecting portion of the main body member is A connecting wall connected to the first fixed portion and parallel to an axial direction of the first fixed portion; A connecting wall connected to the second fixed portion and parallel to an axial direction of the second fixed portion, A connecting member is connected to the connecting portion of the main body member, The connecting member is The two connecting walls of the connecting portion of the main body member are connected so as to maintain a state in which an axial direction of the first fixing portion and an axial direction of the second fixing portion are perpendicular to each other, The third fixing part is connected to the connecting part.

3. The frame metal fitting according to claim 2.

4. The connecting member is A pair of connecting projections are provided which are respectively connected to two connecting walls of the connecting portion of the main body member, The two connecting walls of the connecting portion of the main body member are provided with engagement recesses or engagement holes into which the pair of connecting projections are inserted.

4. The frame metal fitting according to claim 3.

5. The first fixing portion is a first wall connected to the connecting wall of the connecting portion of the main body member, a pair of second walls perpendicular to the first wall and continuous with a pair of side edges of the first wall parallel to the axial direction of the first fixing portion, and a third wall perpendicular to one of the pair of second walls and continuous with a side edge of the one second wall parallel to the axial direction of the first fixing portion, The second fixing portion is The housing includes a first wall connected to the connecting wall of the connecting portion of the main body member, a pair of second walls perpendicular to the first wall and continuous with a pair of side edges of the first wall parallel to the axial direction of the first fixing portion, and a third wall perpendicular to one of the pair of second walls and continuous with a side edge of the one second wall parallel to the axial direction of the first fixing portion.

3. The frame metal fitting according to claim 2.

6. A corner member having three fixing portions perpendicular to each other; a shaft-shaped member connected to the fixed portion of the corner member, The corner member is The frame fitting according to any one of claims 2 to 5, wherein the axial direction of the first fixing portion and the axial direction of the second fixing portion are perpendicular to each other. A frame characterized by:

7. The shaft member is a main body portion having an opening at a tip end and an accommodation space for accommodating a fixing portion of the corner member connected to the opening; a cover portion protruding from a tip of the main body portion, The cover portion is When the entirety of the fixing portion of the corner member is accommodated in the accommodation space, the fixing portion of the corner member is provided so as to cover the outer surface of the connecting portion of the main body member.

7. A frame according to claim 6.

8. The corner members are connected to each other at one end by a shaft-shaped member having a fixed portion of one of the corner members and a shaft-shaped member having a fixed portion of the other of the two adjacent corner members. The relay fitting is, 3. The frame metal fitting according to claim 2, wherein the axial direction of the first fixing portion of the main body is parallel to the axial direction of the second fixing portion.

7. A frame according to claim 6.

9. The shaft member is A plate-like member is bent into a cylindrical shape.

7. A frame according to claim 6.

10. The second fixed portion is provided so that an axial direction of the second fixed portion is perpendicular to an axial direction of the first fixed portion, One wall surface constituting the first fixing portion and one wall surface constituting the second fixing portion are on the same plane and are continuous, forming an L-shaped or I-shaped continuous surface; The plate material is successively bent at right angles using the continuous surface as a base to form the main body member.

2. The frame metal fitting according to claim 1.

11. The second fixed portion is provided so that an axial direction of the second fixed portion is perpendicular to an axial direction of the first fixed portion, The main body member has, in addition to the first fixed portion and the second fixed portion, a third fixed portion that is perpendicular to an axial direction of the first fixed portion and is coaxial with the axial direction of the second fixed portion, The third fixing portion is formed into a cylindrical shape by bending a plate material at a right angle, so that adjacent wall surfaces are continuous with each other, one wall surface constituting the first fixing portion, one wall surface constituting the second fixing portion, and one wall surface constituting the third fixing portion are on the same plane and are continuous, forming a T-shaped continuous surface; The plate material is successively bent at right angles using the continuous surface as a base to form the main body member.

2. The frame metal fitting according to claim 1.

12. A frame constructed using at least one of the frame metal fittings according to claims 1 to 5, 10 or 11, A frame characterized in that a cylindrical shaft-shaped member formed by bending a single sheet of plate material and arranged so that adjacent wall surfaces are continuous is connected to at least one of the first fixing portion or the second fixing portion.

13. A frame constructed using the frame metal fitting according to claim 10 and the frame metal fitting according to claim 11, The first fixing portion and the second fixing portion are both disposed on the same plane, At least one of the first fixing portion or the second fixing portion is connected to a cylindrical relay member or a shaft-shaped member that is formed by bending a single plate material and is provided so that adjacent wall surfaces are continuous with each other, Either the first fixing portion or the second fixing portion of the frame metal fitting is disposed so that its axial direction faces the vertical direction, and the other is disposed so that its axial direction faces the horizontal direction. A frame characterized by:

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