Steel frame

Abstract

To provide a steel frame that can be manufactured with reduced labor.SOLUTION: A steel frame 1 comprises: a pair of vertical frames 2 formed in a groove shape such that they are open on the side toward each other; and a plurality of horizontal frames 3 installed across the pair of vertical frames 2. The horizontal frame 3 comprises: an opening part 30 that is open on one side in the length direction of the vertical frame 2 along the length direction of the horizontal frame 3; a connection surface 31 formed by closing the other side in the length direction of the vertical frame 2; and a pair of lateral surfaces 32a, 32b extending toward the opening part 30 from opposite lateral edges of the connection surface 31. Marginal parts on the connection surface 31 side and the opening part 30 side of the lateral surface 32a of the horizontal frame 3 are recessed such that a receiving part 33 to which an edge of a reinforcing plate material 5 can be fitted is formed in each of the horizontal frames 33. Ends in the length direction of the horizontal frame 3 are inserted into the opening of the vertical frames 2 so that the vertical frame 2 and the horizontal frame 3 are joined.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a steel frame. [Background technology]

[0002] Steel frames, such as steel interior wall frames, which serve as the base for the interior wall materials of buildings, have been known for some time. A steel interior wall frame is formed by erecting multiple horizontal frames between a pair of vertical frames on the left and right. Moisture-proof sheets and heat insulating materials are attached to the frame, and the frame is connected to the outer frame of the building. Interior wall materials such as gypsum boards are fastened with screws to form the interior wall surface of the building. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2006-70507 Summary of the Invention [Problem to be solved by the invention]

[0004] However, forming a steel frame by fastening vertical and horizontal frames with screws is not suitable for mass production and requires manual labor, resulting in low efficiency. Furthermore, when reinforcing plates are fastened to the steel frame to reinforce it, unlike wood, the cross-sectional shape of the steel frame is difficult to process, so the reinforcing plates must be attached using, for example, specialized angled metal fittings, which increases the manufacturing process and the number of parts.

[0005] SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a steel frame that requires less manufacturing effort. [Means for solving the problem]

[0006] A first steel frame that solves the above problem comprises a pair of vertical frames formed in a groove shape with openings on opposite sides, and a plurality of horizontal frames that are installed between the pair of vertical frames, wherein the horizontal frames have an opening on one side of the vertical frames in the longitudinal direction that opens along the longitudinal direction of the horizontal frames, a connection surface formed by closing the other side of the vertical frames in the longitudinal direction, and a pair of side surfaces that extend from both side edges of the connection surface toward the opening, and the edges of one of the side surfaces of the horizontal frames are recessed to form a receiving portion to which the edge of a reinforcing plate material can be attached, and the longitudinal end of the horizontal frame is inserted into the opening of the vertical frame, thereby joining the vertical frame and the horizontal frame.

[0007] The second steel frame is the first steel frame, wherein the vertical frame has a pair of flanges and a web connecting the pair of flanges, and the end of the horizontal frame is inserted between the pair of flanges of the vertical frame, thereby joining the flanges of the vertical frame and the side of the horizontal frame.

[0008] The third steel frame is the first or second steel frame, wherein the vertical frame has a pair of flanges and a web connecting the pair of flanges, and the horizontal frame has a bent portion at the end in the longitudinal direction where the connection surface bends toward the open portion, and the end of the horizontal frame is inserted between the pair of flanges of the vertical frame to join the web of the vertical frame and the bent portion of the horizontal frame.

[0009] The fourth steel frame is any one of the first to third steel frames, further comprising an intermediate vertical frame that is joined to the two horizontal frames between the pair of vertical frames, the intermediate vertical frame having a pair of intermediate flanges and an intermediate web that connects the pair of intermediate flanges, and the pair of intermediate flanges protruding from both longitudinal ends of the intermediate vertical frame, with the horizontal frame inserted between the pair of intermediate flanges to join them. [Effects of the Invention]

[0010] According to the first steel frame, the horizontal frame has an open portion, and the longitudinal ends of the horizontal frame are inserted into the openings of the vertical frames to join the vertical and horizontal frames. This allows access to the inner surface of the horizontal frame and the outer surface of the vertical frame, respectively, through the open portion of the horizontal frame. This allows for the use of joining methods that require a joining device or jig to be attached to both sides of the joint, such as caulking or spot welding. Furthermore, the edges of one side of the horizontal frame, both on the connection surface side and on the open portion side, are recessed to form a receiving portion to which the edge of the reinforcing plate can be attached. This allows the reinforcing plate to be attached directly to the horizontal frame without the need for metal fittings or the like. This makes the steel frame easy to manufacture.

[0011] According to the second steel frame, the flanges of the vertical frame and the sides of the horizontal frame are joined, so the horizontal frame can be formed with the same cross-sectional shape without the ends being processed, simplifying the structure of the horizontal frame.

[0012] According to the third steel frame, the horizontal frame has a bent portion at the end where the connection surface bends toward the open portion, and the web of the vertical frame and the bent portion of the horizontal frame are joined together. Therefore, there is no need to flip the steel frame during the manufacturing process of the steel frame, which simplifies the manufacturing process.

[0013] According to the fourth steel frame, a receiving portion is formed on the side of the horizontal frame, so that even if the intermediate vertical frame cannot be inserted into the opening in the horizontal frame, the pair of intermediate flanges of the intermediate vertical frame can be protruded to insert the horizontal frame into the intermediate vertical frame, and the intermediate vertical frame, which serves as the base for openings such as window frames and inspection hatches, can be joined. [Brief explanation of the drawings]

[0014] [Figure 1] FIG. 2 is an exploded perspective view of the steel frame of the first embodiment. [Figure 2] FIG. 2 is a partially enlarged view illustrating a joint between a vertical frame and a horizontal frame of the steel frame according to the first embodiment. [Figure 3] 1 is a perspective view illustrating the external configuration of a steel frame according to a first embodiment. FIG. [Figure 4] 3 is an enlarged cross-sectional view, partially omitted, illustrating an example of a method for joining a vertical frame and a horizontal frame of the steel frame of the first embodiment. FIG. [Figure 5] FIG. 10 is a perspective view illustrating a state in which a reinforcing plate is fixed to a steel frame. [Figure 6] FIG. 10 is a cross-sectional view illustrating a state in which a reinforcing plate is fixed to a steel frame. [Figure 7] FIG. 10 is an exploded perspective view illustrating the shape of the intermediate vertical frame of the steel frame having an opening. [Figure 8] FIG. 1 is a perspective view illustrating the external configuration of an intermediate vertical frame of a steel frame having an opening. [Figure 9] FIG. 10 is a perspective view illustrating the external configuration of a steel frame having openings at the top and bottom, which is a modified example of the steel frame having openings. [Figure 10] FIG. 10 is a perspective view illustrating the external configuration of a modified steel frame having an opening, in which the opening is provided to one side. [Figure 11] FIG. 10 is a perspective view illustrating the external configuration of a modified steel frame having openings on the left and right sides. [Figure 12] FIG. 10 is a perspective view illustrating the external configuration of a modified steel frame having an opening, in which the opening is a door or a sliding window. [Figure 13] FIG. 10 is an exploded perspective view of a steel frame according to a second embodiment. [Figure 14] FIG. 10 is a partially enlarged view illustrating the joint between the vertical frame and the horizontal frame of the steel frame of the second embodiment. [Figure 15] FIG. 10 is a perspective view illustrating the external configuration of a steel frame according to a second embodiment. [Figure 16] FIG. 10 is a partially omitted enlarged view illustrating the state in which the vertical frame and the horizontal frame of the steel frame of the second embodiment are joined together. DETAILED DESCRIPTION OF THE INVENTION

[0015] [First embodiment] A first embodiment of a steel frame of the present invention will be described below with reference to Figs. 1 to 8. As shown in Figs. 1 and 2, the steel frame 1 is formed into a rectangular surface by combining a plurality of horizontal frames 3 between a pair of vertical frames 2. The steel frame 1 is, for example, an interior wall frame, a floor panel, a ceiling frame, a partition frame, or a parting wall frame, and is a flat base material formed facing the indoor side. However, the steel frame 1 is not limited to this, and may be any building material that can serve as a flat base material formed indoors or outdoors.

[0016] <Configuration of each part of steel frame 1> As shown in FIGS. 1 to 4 , the pair of vertical frames 2 are formed by bending steel plates and are formed into long, channel-like shapes with openings on opposing sides. The vertical frames 2 are composed of a first flange 20 and a second flange 21 that are parallel to each other, and a web 22 that connects the side edges of the first flange 20 and the second flange 21. The first flange 20, the second flange 21, and the web 22 are formed over the entire length of the vertical frame 2 in the longitudinal direction. The first flange 20 and the second flange 21 each have an insertion hole 23 through which a rivet 4a can be inserted at a position where they are joined to the horizontal frame 3. Note that the first flange 20 and the second flange 21 in this embodiment correspond to the "flanges" of the present invention. Furthermore, the vertical frames 2 of the present invention are not necessarily limited to those having the insertion hole 23. For example, if the method of joining the vertical frame 2 and the horizontal frame 3 is spot crimping, in which the overlapping parts of the vertical frame 2 and the horizontal frame 3 are half-punched and joined together, or if spot welding is used, in which the overlapping parts of the vertical frame 2 and the horizontal frame 3 are heated and welded with an electric current, there is no need to provide an insertion hole 23.

[0017] Four horizontal frames 3 are installed between a pair of vertical frames 2. The number of horizontal frames 3 is not limited to four and may be three or less, or five or more. The multiple horizontal frames 3 are installed parallel to each other with a gap between them. As shown in Figures 2 and 4, the horizontal frame 3 is formed into a long length by bending a steel plate. It has an open portion 30 that opens on one side of the vertical frame 2 in the longitudinal direction, a connection surface 31 formed by closing the other side of the vertical frame 2 in the longitudinal direction, and a pair of side surfaces 32a, 32b that extend from both sides of the connection surface 31 toward the open portion 30. The horizontal frames 3 installed at both ends of the vertical frame 2 in the longitudinal direction are arranged so that their respective open portions 30 face the inside of the steel frame 1. As a result, the connection surface 31 of the horizontal frame 3, which is arranged on the outer periphery of the steel frame 1, and the web 22 of the vertical frame 2 are arranged to face the outside of the steel frame 1, which facilitates joining to other building materials installed adjacently (not shown).

[0018] As shown in FIGS. 2 and 4, one side 32a of the pair of side surfaces 32a, 32b has recessed edges on the connection surface 31 side and the open portion 30 side, respectively, and recessed corner receiving portions 33 are formed along the entire length of the side surface 32a. A protruding portion 34 with a U-shaped cross section is formed between the two receiving portions 33. First fixing holes 35 for joining to the vertical frame 2 are formed at both ends of the longitudinal direction of the protruding portion 34 of the horizontal frame 3. Second fixing holes 36 for joining to the vertical frame 2 are formed at both ends of the longitudinal direction of the other side surface 32b of the horizontal frame 3. Note that if the method of joining the vertical frame 2 and the horizontal frame 3 is, for example, spot caulking or spot welding, which does not require the insertion of rivets 4a, then the first fixing holes 35 and the second fixing holes 36 do not need to be formed. Furthermore, the joining method between the vertical frames 2 and the horizontal frames 3 does not have to be the same at all locations, and different joining methods may be used for each joining location, such as riveting one vertical frame 2 and horizontal frame 3 and spot caulking or spot welding the other vertical frame 2 and horizontal frame 3. In this embodiment, the pair of side surfaces 32a, 32b of the horizontal frame 3 are riveted to the first flange 20 and the second flange 21 of the vertical frame 2, respectively, but the joining between the vertical frame 2 and the horizontal frame 3 may be limited to joining one side surface 32a of the horizontal frame 3 to the first flange 20 of the vertical frame 2, or may be limited to joining the other side surface 32b of the horizontal frame 3 to the second flange 21 of the vertical frame 2.

[0019] As shown in Figure 4, both longitudinal ends of the horizontal frame 3 are inserted into and joined to the openings in the vertical frame 2. The first flange 20 of the vertical frame 2 abuts against the protrusion 34 on one side surface 32a of the horizontal frame 3. The insertion hole 23 of the first flange 20 and the first fixing hole 35 of the protrusion 34 are aligned, and a rivet 4a is inserted into the insertion hole 23 and the first fixing hole 35, thereby crimping and fixing the first flange 20 to the protrusion 34. Because the horizontal frame 3 has an opening 30 between the pair of side surfaces 32a, 32b, the rivet 4a can be inserted from the outside of the vertical frame 2 and then pressed from the inside of the horizontal frame 3 to plastically deform the rivet 4a, thereby crimping and fixing the first flange 20 to the protrusion 34.

[0020] Furthermore, the second flange 21 of the vertical frame 2 abuts against the other side surface 32b of the horizontal frame 3. The insertion hole 23 of the second flange 21 and the second fixing hole 36 of the other side surface 32b are aligned, and the rivet 4a is inserted into the insertion hole 23 and the second fixing hole 36, thereby crimping and fixing the second flange 21 to the other side surface 32b. As described above, the horizontal frame 3 has an opening 30, so that the rivet 4a can be inserted from the outside of the vertical frame 2 and then pressed from the inside of the horizontal frame 3 to plastically deform the rivet 4a, thereby crimping and fixing the two together.

[0021] In this embodiment, the joining of the horizontal frame 3 and the vertical frame 2 is not limited to the rivet caulking described above. For example, spot caulking may be used, in which the vertical frame 2 and the horizontal frame 3 themselves are plastically deformed to join them without using rivets 4a. Joining with screws or bolts and nuts may also be used. Furthermore, the joining is not limited to dry joining, and may be spot welding, for example. Even in this case, since the horizontal frame 3 has an opening 30, an electrode (not shown) can be inserted into the inside of the horizontal frame 3 through the opening 30. This allows the outside of the vertical frame 2 and the inside of the horizontal frame 3 to be sandwiched between the electrodes, thereby enabling spot welding.

[0022] <Regarding the steel frame 1 on which the reinforcing plate material 5 is provided> As shown in FIGS. 5 and 6 , the steel frame 1 is reinforced by attaching reinforcing plates 5 between some or all of the horizontal frames 3 as needed. The reinforcing plates 5 are, for example, wooden plywood. However, the reinforcing plates 5 are not limited to this and may be made of metal, resin, or other materials as long as they are strong enough to provide reinforcement. The reinforcing plates 5 are rectangular flat plates that can be inserted between a pair of vertical frames 2 and between the protruding portions 34 of two adjacent horizontal frames 3. The edges of the reinforcing plates 5 that contact the two horizontal frames 3 abut against the receiving portions 33, and the reinforcing plates 5 and the receiving portions 33 are joined by, for example, driving screws 50 at a predetermined pitch. Note that the joining of the reinforcing plates 5 and the receiving portions 33 is not limited to screws 50, and may be joined by, for example, a tacker (not shown), adhesive or tape, or a moisture-proof sheet (not shown) sandwiching the reinforcing plates 5 and the receiving portions 33.

[0023] Preferably, the thickness of the reinforcing plate 5 is equal to the difference in level between the protruding portion 34 and the receiving portion 33. With this configuration, when the reinforcing plate 5 is joined to the receiving portion 33, the protruding portion 34 and the reinforcing plate 5 become flush with each other and form one surface of the steel frame 1. As a result, no difference in level is formed between the reinforcing plate 5 and the protruding portion 34, and therefore, when a desired surface material such as a wall surface material, floor surface material, or ceiling surface material is attached to the steel frame 1, it can be attached stably and accurately.

[0024] As described above, by forming the receiving portion 33 on one side surface 32a of the steel frame 1, the reinforcing plate material 5 can be attached directly to the steel frame 1, thereby reducing the manufacturing effort and material costs of the steel frame 1.

[0025] <Regarding the steel frame 1 in which the opening 6 is provided> The steel frame 1 may be provided with an opening 6, as shown in Fig. 8. For example, window frames, doors, or inspection hatches may be provided in the interior wall frames, and openings 6 such as inspection hatches or entrances to underfloor or attic storage may be provided in the floor panels or ceiling frames. In such cases, the steel frame 1 is formed to serve as a base for the edges of the openings 6.

[0026] As shown in Figures 7 and 8, the steel frame 1 in which the opening 6 is provided further includes an intermediate vertical frame 7 that is joined to two horizontal frames 3 between a pair of vertical frames 2. In this embodiment, the steel frame 1 includes two parallel intermediate vertical frames 7. An intermediate horizontal frame 8 is also installed between one intermediate vertical frame 7 and one vertical frame 2, and between the other intermediate vertical frame 7 and the other vertical frame 2.

[0027] The cross-sectional shape of the intermediate vertical frame 7 is the same as that of the vertical frame 2. The intermediate vertical frame 7 has a pair of intermediate flanges 70 and an intermediate web 71 connecting the pair of intermediate flanges 70. The intermediate vertical frame 7 is formed to be shorter than the vertical frame 2. At both ends of the intermediate vertical frame 7 in the longitudinal direction, the pair of intermediate flanges 70 are formed to protrude beyond the intermediate web 71.

[0028] Furthermore, since the intermediate horizontal frame 8 has the same cross-sectional shape as the horizontal frame 3, the same reference numerals are used for each component, and detailed description thereof will be omitted. Like the horizontal frame 3, the intermediate horizontal frame 8 has an open section 30, a connection surface 31, and a pair of side surfaces 32a and 32b. One side surface 32a of the intermediate horizontal frame 8 has recessed edges on the connection surface 31 side and the open section 30 side, forming a recessed cornered receiving portion 33 along its entire length. A protruding portion 34 with a U-shaped cross section is formed between the two receiving portions 33. The method of joining the intermediate horizontal frame 8 to the vertical frame 2 and the intermediate vertical frame 7 is similar to the method of joining the horizontal frame 3 to the vertical frame 2 described above, and therefore description thereof will be omitted. While the intermediate horizontal frame 8 is provided in this embodiment, the intermediate horizontal frame 8 may be omitted if the strength of the steel frame 1 is sufficient, such as when the opening 6 is small.

[0029] The intermediate vertical frame 7 is inserted between two horizontal frames 3, and both ends are joined to the horizontal frames 3. The horizontal frame 3 is inserted between both ends of a pair of intermediate flanges 70 of the intermediate vertical frame 7. The protrusion 34 on one side surface 32a of the horizontal frame 3 abuts against one of the intermediate flanges 70 and is joined by a joining method such as crimping, screw joining, or spot welding. The other side surface 32b of the horizontal frame 3 abuts against the other intermediate flange 70 and is joined by a joining method such as crimping, screw joining, or spot welding. Since the openings 30 on the horizontal frames 3 sandwich the outside of the intermediate vertical frame 7 and the inside of the horizontal frames 3, various joining methods can be used, allowing for a joining with appropriate strength with minimal effort. The steel frame 1 having the openings 6 is not limited to the above example. For example, as shown in FIG. 9, two openings 6 may be formed continuously vertically. 10, a single intermediate vertical frame 7 may be provided in a steel frame 1, and the upper and lower horizontal frames 3, one vertical frame 2, and the intermediate vertical frame 7 may form an opening 6 positioned to one side of the structural frame 1. Furthermore, as shown in FIG. 11, two intermediate vertical frames 7 may be provided, and the opening 6 may be formed between one vertical frame 2 and one intermediate vertical frame 7, and between the other vertical frame 2 and the other intermediate vertical frame 7. Furthermore, the horizontal frames 3 are not necessarily formed above and below the opening 6; for example, as shown in FIG. 12, in an opening 6 in which a door or a bay window is provided, the horizontal frame 3 does not have to be provided at the lower edge of the opening 6.

[0030] Second Embodiment Next, a second embodiment of the steel frame of the present invention will be described with reference to Figures 13 to 15. Like the steel frame 1 of the first embodiment, the steel frame 1 of the second embodiment is formed into a rectangular surface by combining a pair of vertical frames 2 and a plurality of horizontal frames 3, and like the steel frame 1 of the first embodiment, it may be made of any building material that can serve as the base for a flat surface to be formed indoors or outdoors. Note that the same components as those of the first embodiment will be assigned the same reference numerals and descriptions thereof will be omitted.

[0031] <Configuration of each part of steel frame 1> 13, the pair of vertical frames 2 have the same configuration as in the first embodiment, and therefore description thereof will be omitted. However, unlike the first embodiment, the first flange 20 and the second flange 21 of the pair of vertical frames 2 do not have insertion holes 23 for inserting rivets 4a. Furthermore, the webs 22 of the pair of vertical frames 2 are formed with insertion holes 24 for inserting rivets 4b.

[0032] As shown in Figures 13 and 14, the cross-sectional shape and arrangement of the horizontal frame 3 are similar to those of the horizontal frame 3 of the first embodiment. A plurality of horizontal frames 3 are installed parallel to each other with a gap between them between a pair of vertical frames 2, and are formed into a long length by bending a steel plate. The horizontal frame 3 has an open portion 30 that opens on one side in the longitudinal direction of the vertical frame 2, a connection surface 31 formed by closing the other side in the longitudinal direction of the vertical frame 2, and a pair of side surfaces 32a, 32b that extend from both side edges of the connection surface 31 toward the open portion 30. The horizontal frame 3 has the connection surface 31 formed by the pair of side surfaces 32a, 32b that extends in the longitudinal direction, and the end of the connection surface 31 in the longitudinal direction is bent toward the open portion 30 to form a bent portion 37.

[0033] One side 32a of the pair of side surfaces 32a, 32b of the horizontal frame 3 has recessed edges on the connection surface 31 side and the open portion 30 side, and recessed corner receiving portions 33 are formed along the entire length of the side surface 32a, and a protruding portion 34 with a U-shaped cross section is formed between the two receiving portions 33. Unlike the first embodiment, the horizontal frame 3 of this embodiment does not have first fixing holes 35 formed at both ends in the longitudinal direction of the protruding portion 34, and no second fixing holes 36 are formed at both ends in the longitudinal direction of the other side surface 32b of the horizontal frame 3. On the other hand, fixing holes 38 are formed in the bent portions 37 of the horizontal frame 3 of this embodiment.

[0034] As shown in Figures 15 and 16, both ends of the horizontal frame 3 in the longitudinal direction are inserted into and joined to the openings of the vertical frame 2. The web 22 of the vertical frame 2 abuts against the bent portion 37 of the horizontal frame 3. The insertion holes 24 of the web 22 of the vertical frame 2 and the fixing holes 38 of the bent portion 37 of the horizontal frame 3 are aligned, and rivets 4b are inserted into the insertion holes 24 and the fixing holes 38, thereby crimping and fixing the web 22 to the bent portion 37. Because the horizontal frame 3 has an open portion 30, the rivets 4b can be inserted from the outside of the vertical frame 2 and then pressed from the inside of the horizontal frame 3 to plastically deform the rivets 4b, thereby crimping and fixing the web 22 to the bent portion 37. In Figures 13 to 16, two fixing holes 38 are formed in each of the bending portions 37 of the horizontal frame 3, and two insertion holes 24 are also formed in the webs 22 of the vertical frame 2 at the portions overlapping with the fixing holes 38, but the joint between the vertical frame 2 and the horizontal frame 3 may be one point for each bending portion 37, or three or more points for each bending portion 37.

[0035] As in the first embodiment, the joining of the horizontal frame 3 and the vertical frame 2 is not limited to the rivet caulking described above. For example, a caulking joint that does not use rivets 4b, such as spot caulking, may be used. Joining with screws or joining with bolts and nuts may also be used. Furthermore, the joining is not limited to dry joining, and may be spot welding, for example. Even in this case, an electrode can be inserted into the inside of the horizontal frame 3 through the opening 30 provided in the horizontal frame 3, so that the outside of the vertical frame 2 and the inside of the horizontal frame 3 can be sandwiched between the electrodes, allowing spot welding to be performed.

[0036] In this way, the horizontal frame 3 of this embodiment is configured so that the bent portion 37 formed at the end is joined to the web 22 of the vertical frame 2, so there is no need to invert the steel frame 1 during the manufacturing process of the steel frame 1, which simplifies the manufacturing process.

[0037] The steel frame 1 of the second embodiment may be provided with a reinforcing plate 5, as in the first embodiment. The steel frame 1 of the second embodiment may be provided with an opening 6, as in the first embodiment. The reinforcing plate 5 and the opening 6 in the second embodiment have the same configuration as in the first embodiment, and therefore a description thereof will be omitted.

[0038] It goes without saying that the embodiments of the present invention are not limited to the above-described embodiments, and can be modified as appropriate without departing from the scope of the concept of the present invention.

[0039] This specification discloses the following techniques: [Appendix 1] A steel frame comprising a pair of vertical frames formed in a groove shape with openings on opposing sides, and a plurality of horizontal frames installed between the pair of vertical frames, wherein the horizontal frames have an open portion on one side of the vertical frames in the longitudinal direction that opens along the longitudinal direction of the horizontal frames, a connection surface formed by closing the other side of the vertical frames in the longitudinal direction, and a pair of side surfaces extending from both side edges of the connection surface toward the open portion, wherein the edges of one of the side surfaces of the horizontal frames on the connection surface side and the open portion side are set back to form a receiving portion to which the edge of a reinforcing plate material can be attached, and the longitudinal ends of the horizontal frames are inserted into the openings of the vertical frames to join the vertical frames and the horizontal frames.

[0040] According to Supplementary Note 1, the horizontal frame has an open section, and the longitudinal end of the horizontal frame is inserted into the opening of the vertical frame to join the vertical and horizontal frames. This allows access to the inner surface of the horizontal frame and the outer surface of the vertical frame, respectively, through the open section of the horizontal frame. This allows for the use of joining methods that require a joining device or jig to be attached to both sides of the joint, such as caulking or spot welding. Furthermore, the edges of one side of the horizontal frame, both on the connection surface side and on the open section side, are recessed to form a receiving portion to which the edge of the reinforcing plate can be attached. This allows the reinforcing plate to be attached directly to the horizontal frame without the need for metal fittings or the like. This makes the steel frame easy to manufacture.

[0041] [Appendix 2] In the steel frame of Appendix 1, the vertical frame has a pair of flanges and a web connecting the pair of flanges, and the end of the horizontal frame is inserted between the pair of flanges of the vertical frame, joining the flanges of the vertical frame and the side surface of the horizontal frame.

[0042] According to Appendix 2, since the flange of the vertical frame and the side of the horizontal frame are joined, the horizontal frame can be formed with the same cross-sectional shape without the ends being processed, thereby simplifying the structure of the horizontal frame.

[0043] [Appendix 3] In the steel frame of Appendix 1, the vertical frame has a pair of flanges and a web connecting the pair of flanges, and the horizontal frame has a bent portion at the end in the longitudinal direction where the connection surface bends toward the open portion, and the end of the horizontal frame is inserted between the pair of flanges of the vertical frame, joining the web of the vertical frame and the bent portion of the horizontal frame.

[0044] According to Appendix 3, the horizontal frame has a bent portion at the end where the connection surface bends toward the open portion, and the web of the vertical frame and the bent portion of the horizontal frame are joined together. Therefore, there is no need to flip the steel frame during the manufacturing process of the steel frame, which simplifies the manufacturing process.

[0045] [Appendix 4] The steel frame of Appendix 1 further comprises an intermediate vertical frame that is joined to the two horizontal frames between the pair of vertical frames, the intermediate vertical frame having a pair of intermediate flanges and an intermediate web that connects the pair of intermediate flanges, and the pair of intermediate flanges protrude from both ends of the intermediate vertical frame in the longitudinal direction, and the horizontal frame is inserted between the pair of intermediate flanges to be joined.

[0046] According to Appendix 4, by forming a receiving portion on the side of the horizontal frame, even if the intermediate vertical frame cannot be inserted into the opening of the horizontal frame, the horizontal frame can be inserted into the intermediate vertical frame by protruding a pair of intermediate flanges of the intermediate vertical frame, and the intermediate vertical frame, which serves as the base for openings such as window frames and inspection hatches, can be joined. [Industrial Applicability]

[0047] The steel frame according to the present invention is suitable for use as, for example, a steel inner wall frame for a building. [Explanation of symbols]

[0048] 1...steel frame, 2...vertical frame, 3...horizontal frame, 4a...rivet, 4b...rivet, 5...reinforcing plate, 6...opening, 7...intermediate vertical frame, 20...first flange (flange), 21...second flange (flange), 22...web, 30...opening portion, 31...connection surface, 32a...one side, 32b...other side, 33...receiving portion, 34...protruding portion, 37...folded portion, 70...intermediate flange, 71...intermediate web.

Claims

1. A pair of vertical frames formed in a groove shape with openings on opposing sides; a plurality of horizontal frames installed between the pair of vertical frames, The horizontal frame has an opening portion that opens along the longitudinal direction of the horizontal frame on one side of the longitudinal direction of the vertical frame, a connection surface formed by closing the other side of the longitudinal direction of the vertical frame, and a pair of side surfaces that extend from both side edges of the connection surface toward the opening portion, The horizontal frame has edges on the connection surface side and the open portion side of one of the side surfaces recessed to form a receiving portion to which an edge of a reinforcing plate material can be attached, The longitudinal end of the horizontal frame is inserted into the opening of the vertical frame, and the vertical frame and the horizontal frame are joined together. Steel frame.

2. The vertical frame has a pair of flanges and a web connecting the pair of flanges, The end portions of the horizontal frame are inserted between the pair of flanges of the vertical frame, and the flanges of the vertical frame and the side surfaces of the horizontal frame are joined together.

2. The steel frame of claim 1.

3. The vertical frame has a pair of flanges and a web connecting the pair of flanges, The horizontal frame has a bent portion formed at an end in the longitudinal direction, where the connection surface is bent toward the open portion, The end portions of the horizontal frame are inserted between the pair of flanges of the vertical frame, and the web of the vertical frame and the bent portion of the horizontal frame are joined.

2. The steel frame of claim 1.

4. Further provided is an intermediate vertical frame that is joined to the two horizontal frames between the pair of vertical frames, The intermediate vertical frame has a pair of intermediate flanges and an intermediate web connecting the pair of intermediate flanges, and the pair of intermediate flanges protrude from both ends of the intermediate vertical frame in the longitudinal direction, and the horizontal frame is inserted between the pair of intermediate flanges and joined.

2. The steel frame of claim 1.

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