Reinforcement structure at the connection point of vertical and horizontal frames

Abstract

To reinforce a connecting part at which a vertical frame 2 and a transom 5 are connected by fastening a screw 15e inserted from a connection fitting 15 provided on the vertical frame to a connection receiving fitting 14 provided on the transom 5.SOLUTION: When reinforcing a connecting part using a reinforcing fitting 16, a base piece part 16a of the reinforcing fitting 16 is screwed to the connection fitting 15, and an extending piece part 16c is screwed to a vertical frame side straddling piece part 2a.SELECTED DRAWING: Figure 11

Description

Technical Field

[0001] The present invention relates to a technical field of a reinforcement structure at a connecting portion of vertical and horizontal frames constituting frame materials such as door frames and partition frames provided at entrances and partitions of buildings such as buildings and houses, and further unit frames in which a door frame and a lintel frame are integrally formed.

Background Art

[0002] Generally, frame materials such as door frames for opening and closing a door body and unit frames in which the door frame and a lintel frame are integrally formed may be installed at openings such as entrances provided in buildings. As such frame materials, a vertical frame and a horizontal frame having a cross-piece portion and both leg-piece portions are used, and an integral frame assembly of the vertical and horizontal frames is formed by connecting the horizontal frame with its left and right outer edges (front edges) abutted against the inner edges in the left and right directions of the cross-piece portion on the vertical frame side (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In such a connection structure, the conventional one arranges a connecting fitting on the outer side in the left and right directions of the cross-piece portion on the vertical frame side, and provides a connecting receiver on the cross-piece portion on the horizontal frame side. Then, a connecting screw inserted from the connecting fitting is fastened to the connecting receiving fitting in a state of penetrating the cross-piece portion on the vertical frame side to connect the vertical and horizontal frames. By adopting this connection structure, it is considered to have a corresponding connection strength. However, recently, due to the prediction of the occurrence of large earthquakes, it is desired to further increase the strength in the connection structure of the vertical and horizontal frames, and this is the problem to be solved by the present invention.

Means for Solving the Problems

[0005] The present invention was created in view of the above circumstances and with the aim of solving these problems, and the invention of claim 1 is a vertical and horizontal frame having a straddle portion and a leg portion, and the vertical and horizontal frames are connected by a connecting screw inserted from a connecting fitting located on the left and right outer side of the straddle portion of the vertical frame, with the left and right outer end edge of the horizontal frame abutting against the left and right inner edge of the straddle portion of the vertical frame, and fastening the connecting screw, which is inserted from a connecting fitting located on the left and right outer side of the straddle portion of the vertical frame, to a connecting receiving fitting provided on the straddle portion of the horizontal frame, so as to penetrate the straddle portion of the vertical frame. In this section, when reinforcing the connecting portion using a reinforcing fitting, the reinforcing fitting comprises a base piece positioned on the left-right outer side of the connecting fitting, a bent piece bent outward from the base piece, and an extended piece extending from the bent piece so as to face the left-right outer surface of the vertical frame side straddling piece, wherein the base piece is fastened to the connecting fitting via a first reinforcing screw, and the extended piece is fastened to the vertical frame side straddling piece via a second reinforcing screw, thus providing a reinforcing structure for the connecting portion of the vertical and horizontal frames. The invention of claim 2 is a reinforcing structure for the connection portion of vertical and horizontal frames according to claim 1, characterized in that the connecting fitting has a U-shaped cross-section with a straddling portion facing the straddling portion on the vertical frame side and upper and lower leg portions, and the reinforcing fitting has a base portion facing the straddling portion on the connecting fitting side and an extended portion bent from the base portion so as to extend beyond the leg portion on the connecting fitting side. The invention of claim 3 is a reinforcing structure for a connecting portion of a vertical and horizontal frame according to claim 2, characterized in that the vertical frame side straddling portion comprises straddling bottom surfaces on both the front and rear sides, and straddling protruding surfaces located between the two straddling bottom surfaces and protruding outward in the left and right directions from the straddling bottom surfaces, the vertical frame side straddling portion has a through hole that extends from the straddling protruding surfaces to a part of both straddling bottom surfaces and through which the connecting screw passes, the connecting fitting side straddling portion has both front and rear side portions that abut the surface of the straddling bottom surface that is outward in the front and rear directions from the through hole while passing through the straddling protruding surfaces of the through hole, and the horizontal frame side straddling portion is provided with a positioning projection that abuts the inner periphery of the through hole to position the horizontal frame relative to the vertical frame. The invention of claim 4 is a reinforcing structure for the connecting portion of a vertical and horizontal frame according to claim 3, characterized in that the positioning projection is opposite to the lower leg portion of the connecting fitting. The invention of claim 5 is characterized in that the connecting fitting side leg piece has a tip edge that protrudes outward in the left-right direction from the straddling piece protruding surface, and a notch is formed in the tip edge of the connecting fitting side leg piece such that at least the portion corresponding to the reinforcing fitting extension piece is in substantially the same position as the straddling piece protruding surface, and the reinforcing fitting extension piece is bent at the notched portion of the connecting fitting side leg piece and abuts against the straddling piece protruding surface of the vertical frame side straddling piece. 3 or 4 This is a reinforcing structure at the connection point of the vertical and horizontal frames described. The invention of claim 6 is a reinforcing structure for the connecting portion of a vertical and horizontal frame according to claim 5, characterized in that a vertical frame for transoms is provided at the portion where the straddling protruding surface portion and the extended portion are fastened together, and the extended portion is fastened together with the vertical frame for transoms to form a three-layer structure, so that the vertical frame for transoms acts as a reinforcing member. The invention of claim 7 is a reinforcing structure for a connecting portion of a vertical and horizontal frame according to any one of claims 1 to 6, characterized in that a pair of extended pieces are formed extending from the base piece toward both the vertical and horizontal sides. [Effects of the Invention]

[0006] The invention of claim 1 connects a vertical frame and a horizontal frame by fastening connecting screws inserted from the connecting fitting to the connecting receiving fitting, with a connecting fitting located on the vertical frame side and a connecting receiving fitting provided on the horizontal frame side. When reinforcing the connection portion is performed using a reinforcing fitting having a base piece and an extension piece, the base piece is fastened with screws to the connecting fitting and the extension piece is fastened with screws to the crossing piece on the vertical frame side. As a result of using a reinforcing fitting, the reinforcing fitting reinforces the connection portion between the vertical frame and the horizontal frame, which is formed by the connection between the connecting fitting and the connecting receiving piece, via the crossing piece on the vertical frame side, thereby improving seismic resistance. By adopting the invention of claim 2, the extended portion provided on the reinforcing fitting is formed by bending it to extend beyond the leg portion provided on the connecting fitting. As a result, the integration of the reinforcing fitting and the connecting fitting is promoted, which contributes to increased strength. The invention of claim 3 provides that the vertical frame side straddle portion comprises straddle bottom surfaces on both the front and rear sides, and straddle protruding surfaces located between the two straddle bottom surfaces and protruding outward in the left and right directions from the straddle bottom surfaces, and the connecting fitting side straddle portion abuts against the straddle bottom surfaces while penetrating the straddle protruding surfaces, and the horizontal frame side straddle portion is provided with a positioning projection for positioning the horizontal frame relative to the vertical frame, as a result, positioning when connecting the vertical frame and the horizontal frame becomes easier, and the connection work is made easier. By adopting the invention of claim 4, the positioning projection faces the lower leg portion of the connecting fitting, and the positioning projection and the lower leg portion of the connecting fitting are laminated in a surface contact state, which contributes to improving the reinforcing function. By adopting the invention of claim 5, the connecting fitting side leg piece has a tip edge that protrudes outward in the left-right direction compared to the straddling piece protruding surface, making it easy to assemble the connecting fitting side leg piece onto the vertical frame. Furthermore, by providing a notch formed on the tip edge of the connecting fitting side leg piece, the reinforcing fitting extension piece can be bent in a state where it abuts against the straddling piece protruding surface, making it easy to fasten the reinforcing fitting extension piece with the straddling piece protruding surface using screws. By adopting the invention of claim 6, a reinforcing plate is provided on the protruding surface portion of the straddle piece, and the extended portion is, The vertical frame for the transom serves as a reinforcing member. As a result of fastening to the protruding surface of the reinforced section, the reinforcing function at the connection point between the vertical and horizontal frames is further improved. By adopting the invention of claim 7, reinforcement can be achieved by a pair of upper and lower extended pieces, thereby improving the reinforcing function. [Brief explanation of the drawing]

[0007] [Figure 1] This is a perspective view of a sliding door. [Figure 2] This is a vertical cross-section of a sliding door. [Figure 3] This is a cross-sectional view of a sliding door. [Figure 4] (A)(B)(C)(D) are the inner side view, front view, outer side view, and top view of the vertical frame. [Figure 5](A), (B), (C), (D), and (E) are the front view, plan view, bottom view, side view, and longitudinal sectional end view of the upper horizontal frame. [Figure 6] (A), (B), (C), (D), and (E) are the front view, plan view, bottom view, side view, and longitudinal sectional end view of the lower horizontal frame. [Figure 7] (A), (B), (C), (D), and (E) are the front view, plan view, bottom view, side view, and longitudinal sectional end view of the blind. [Figure 8] (A) and (B) are the sectional front view and sectional plan view of the connecting part of the upper horizontal frame, and (C) and (D) are the sectional front view and sectional plan view of the connecting part of the vertical frame and the upper horizontal frame. [Figure 9] (A) and (B) are the perspective view and exploded perspective view with a part of the connecting part of the vertical frame and the upper horizontal frame cut out. [Figure 10] (A) and (B) are the sectional front view and sectional plan view of the connecting part of the blind, and (C) and (D) are the sectional front view and sectional plan view of the connecting part of the vertical frame and the blind. [Figure 11] (A) and (B) are the perspective view and exploded perspective view with a part of the connecting part of the vertical frame and the blind cut out. [Figure 12] (A) and (B) are the sectional front view and sectional plan view of the connecting part of the lower horizontal frame, and (C) and (D) are the sectional front view and sectional plan view of the connecting part of the vertical frame and the lower horizontal frame. [Figure 13] (A) and (B) are the perspective view and exploded perspective view with a part of the connecting part of the vertical frame and the lower horizontal frame cut out. [Figure 14] (A), (B), and (C) are the front view, side view, and plan view of the connecting fitting for the upper horizontal frame. [Figure 15] (A), (B), and (C) are the front view, side view, and plan view of the reinforcing fitting for the upper horizontal frame. [Figure 16] It is the longitudinal sectional view of the connecting part of the vertical frame and the blind in the second embodiment.

Embodiments for Carrying Out the Invention

[0008] Hereinafter, embodiments of the present invention will be described based on the drawings. In the drawings, reference numeral 1 denotes a unit frame in which a door frame is installed in an opening for forming an entrance E of a building, and a lattice frame is formed above the door frame. The unit frame 1 is configured in a rectangular frame shape including a pair of left and right vertical frames 2, an upper horizontal frame 3 provided at upper and lower end edges of the vertical frame 2, and a lower horizontal frame (threshold) 4. Further, in the present embodiment, a seamless (seamless frame, intermediate horizontal frame) 5 is provided in a state of being spanned between intermediate portions in the vertical direction of the left and right vertical frames 2 so as to partition the opening into a lower entrance E and an upper lattice (lattice space) R. A sliding door body 6 is provided in the entrance E so as to be openable and closable, and a thin lattice plate (partition plate) 7 such as a glass plate is incorporated in the lattice R. That is, the unit frame 1 of the present embodiment has a configuration in which the upper side is a lattice frame and the lower side is a door frame with the seamless 5 as a boundary. However, as a frame material capable of implementing the present invention, it is needless to say that it can be a door frame without a lattice, or even an intermediate partition frame for forming an intermediate partition for partitioning an indoor space without providing the door body 6. And the reinforcement structure at the connecting portion of the vertical and horizontal frames in which the present invention is implemented is implemented at each connecting portion of the left and right vertical frames 2, the upper frame 3, and the seamless 5. Incidentally, the door body 6 is not limited to a sliding door type and may of course be a hinged door type. Also, the lattice plate 7 may of course be a thick panel material like the door body 6.

[0009] As shown in FIG. 4, the vertical frame 2 is configured to include a straddle piece portion 2a that serves as an inner side plate in the left-right direction, and front and rear leg piece portions 2b that are bent outward in the left-right direction from front and rear end edges of the straddle piece portion 2a. The vertical frame side straddle piece portion 2a includes straddle bottom surface portions 2c on both outer sides in the front-rear direction, and a straddle protruding surface portion 2d that is positioned (arranged) in a state of being sandwiched between the two straddle bottom surface portions 2c and is bent and formed to protrude convexly outward in the left-right direction from the straddle bottom surface portions 2c. In this case, the vertical frame side leg piece portion 2b is further configured to include a leg piece body portion 2e that is bent outward in the left-right direction from the front-rear outer edge of the straddle piece bottom surface portion 2c, and a leg piece tip surface portion 2f that is bent inward in the front-rear direction from the left-right outer edge of the leg piece body portion 2e. The vertical frame 2 is configured in this way, creating an opening 2h between the front and rear leg tip surfaces 2f, and the vertical frame side straddling portion 2a is configured such that the straddling protruding surface 2d is shallow grooved (raised bottom), while the front and rear straddling bottom surfaces 2c are deep grooved.

[0010] Furthermore, as described above, the unit frame 1 of this embodiment has a transom R formed in the upper part with a transom board 7 incorporated into it. Therefore, a vertical frame 8 for the transom is attached to the part of the vertical frame side crossing piece 2a corresponding to the transom R to fit and incorporate the transom board 7. Specifically, the transom vertical frame (transom vertical frame) 8 is made of C-shaped steel material arranged with a narrow opening 8a on the inside in the left-right direction, into which the left and right side edges of the transom panel 7 are fitted and assembled. The transom vertical frame 8 is fitted and assembled into the recessed left-right inner surface of the straddling protruding surface 2d of the straddling piece 2a on the vertical frame side, and the straddling piece 8b of the transom vertical frame 8 is fastened to the straddling protruding surface 2d via screws 8c inserted from the opening 8a side (inside in the left-right direction). The vertical frame 2 is attached to the structural vertical member K (for example, a vertical rail material installed on a wall or column), thereby securing the vertical frame 2 to the structural frame. However, it is also possible to embed it, as shown in the lower horizontal frame 4 described later.

[0011] On the other hand, the upper horizontal frame 3 is made of a C-shaped steel member, positioned with an opening 3c on the ceiling side (upper side), as shown in Figure 5. Specifically, the upper horizontal frame 3 has a lower straddling piece 3a and front and rear leg pieces 3b, and the straddling piece 9b of the transom upper frame (transom upper frame) 9, which has an opening 9a for fitting the upper edge of the transom board 7, is fastened to the lower surface of the upper horizontal frame straddling piece 3a via screws 9c. The upper horizontal frame 3 is then attached to the building structure by connecting it to the ceiling-side member (for example, the ceiling rail material) H, similar to the vertical frame 2. Incidentally, in this embodiment, an auxiliary fitting (which has a reinforcing function) 9d is attached to the overlapping piece 9b of the transom upper frame 9 via screws 9e while it is installed inside the transom upper frame 9.

[0012] Furthermore, as shown in Figure 6, the lower horizontal frame 4 is composed of a straddle portion 4a and leg portions 4b that are bent downward from both the front and rear edges of the straddle portion 4a. A rail groove portion 4c is formed in a recessed shape in the straddle portion 4a into which a running rail (lower rail) 20 for guiding the running roller 6a provided at the lower end of the door body 6 is incorporated. In this embodiment, the leg portions 4b of the lower horizontal frame 4 are embedded in the floor F, but it goes without saying that they may also be connected to the building structure side members.

[0013] Furthermore, as shown in Figure 7, the transom 5 is made of a C-shaped steel material having a straddle portion 5a that forms the lower side, two leg portions 5b that form the front and rear sides, and an upper portion 5c in which an opening 5d is formed in the middle in the front-rear direction. An interior U-shaped auxiliary fitting (with a reinforcing function) 5e is fastened to the transom side straddle portion 5a via screws 5f. In this case, the straddle portion of the running rail (upper rail) 5g, which fits into a guide groove 6b formed on the upper edge of the door body 6 to guide the upper end of the door body 6, is fastened to the transom side straddle portion 5a together with the auxiliary fitting 5e via screws 5f.

[0014] Furthermore, a lower frame for the transom (lower frame for the transom) 10 is attached to the upper surface of the upper piece 5c of the transom 5, covering (closing) the opening 5d. The lower frame for the transom 10 is divided into front and rear frame halves 10a and 10b, and has an opening 10c formed therein for fitting and assembling the lower edge of the transom board 7. One half of the picture frame 10a is provided with a lower piece 10d that extends from one upper transom side 5c across the opening 5d to the other upper transom side 5c, and the lower piece 10d is fastened via screws 10f to a mounting bracket 10e that is provided on the lower surface of the upper transom side 5c with the opening 5d spanning across it, thereby enabling the attachment of one half of the picture frame 10a to the transom 5. In contrast, the other half of the frame 10b is configured to have a fastening piece 10h that is fastened to the upper piece 5c on the other side of the transom 5 by a screw 10g. With one half of the frame 10a attached to the transom 5, the left and right edges and the upper edge of the transom board 7 are fitted into the openings 8a and 9a of the transom vertical frame 8 and upper frame 9, and with the lower edge of the transom board 7 facing the one half of the frame 10a, the other half of the frame (fencing) 10b is attached to the transom 5, thereby enabling the transom board 7 to be attached and detached. Incidentally, if the transom board 7 is the aforementioned thick panel, the vertical frame 8, upper frame 9, and lower frame 10 for the transom are not provided, and it is directly attached to the vertical frame 2, upper horizontal frame 3, and transom 5. However, the attachment structure is the same as before, so a detailed explanation will be omitted.

[0015] Next, we will explain the connection structures of the vertical frame 2 and the upper horizontal frame 3, the vertical frame 2 and the transom 5, and the vertical frame 2 and the lower horizontal frame 4, in order. First, the vertical frame 2 has through holes 2m, 2n, and 2o formed in the straddling portion 2a for connecting with the upper horizontal frame 3, the transom 5, and the lower horizontal frame 4. The through holes 2m and 2n for the upper horizontal frame 3 and the transom 5 are formed to be wide in the front-to-back direction, extending to the front-to-back inner portions of the front and rear straddling bottom portions 2c, sandwiching the straddling protruding surface portion 2d. However, the through holes 2o for the lower horizontal frame are narrow, and a pair of them are formed front to back, only extending to the front-to-back inner portions of the front and rear straddling bottom portions 2c. Furthermore, the vertical frame 8 for the transom, which is attached to the vertical frame 2, is set so that the length of its upper and lower edges does not reach the through holes 2m and 2n for the upper horizontal frame 3 and the transom 5.

[0016] Next, regarding the connection structure between the vertical frame 2 and the upper horizontal frame 3, as shown in Figures 4, 8, and 9, a U-shaped connecting bracket 11 is attached to the left and right edge portions of the upper horizontal frame 3 in a front view. The connecting bracket 11 is fitted inside with its upper and lower leg portions 11a fitting against the upper horizontal frame side leg portion 3b and straddle portion 3a, and is fastened via screws 11b and 9c. Furthermore, a positioning projection 3i is formed on the upper horizontal frame side straddle portion 3a, extending outward in the left and right direction from the left and right outer edge 3h that abuts against the bottom surface portion 2c of the straddle portion 2a on the vertical frame side, and passing through the through hole 2m in a position that contacts the lower inner peripheral edge 2p of the through hole 2m for the upper horizontal frame from above. This configuration allows for positioning of the mounting position of the upper horizontal frame 3 relative to the vertical frame 2. A notch 3j is formed at the tip edge of the positioning projection 3i.

[0017] On the other hand, a U-shaped connecting fitting 12 is provided on the left and right outer portion of the vertical frame side straddling portion 2a, with the straddling portion 12a facing inward in the left and right direction and the leg portions 12b positioned vertically. The connecting fitting 12 is assembled so that both the front and rear portions of the connecting fitting side straddling portion 12a abut against the straddling bottom surface portion 2c of the vertical frame side straddling portion 2a, with the connecting fitting 12 passing through the through hole 2m for the upper horizontal frame formed in the straddling portion protruding surface portion 2d of the vertical frame side straddling portion 2a. In this case, the upper and lower connecting fitting side leg pieces 12b are fitted into the through hole 2m for the upper horizontal frame. Both the upper and lower leg pieces 12b are inclined pieces that widen in the vertical direction as they move outward in the left-right direction, forcing them into the through hole 2m for the upper horizontal frame. This configuration ensures that the connecting fitting 12 is securely fitted to the vertical frame 2 without any play. Furthermore, the connecting fitting's straddle portion 12a has a pair of large-diameter connecting screw holes 12c on both the front-to-back sides and a pair of small-diameter reinforcing screw holes 12d on the central side. The connecting fitting 12 is then fitted into the upper horizontal frame through hole 2m from the straddle portion 12a side, and the connecting screws 12e that pass through the connecting screw holes 12c and the upper horizontal frame through hole 2m are screwed into the connecting screw holes 11d formed in the connecting receiving fitting 11. This integrates the connecting fitting 12 and the connecting receiving fitting 11, enabling a unified fastening between the vertical frame 2 and the upper horizontal frame 3, thus forming the connection between the vertical frame 2 and the upper horizontal frame 3. In this case, the lower leg portion 12b of the connecting fitting 12 will come into surface contact (stacked state) with the positioning projection 3i formed on the upper horizontal frame 3 from above, thereby contributing to strengthening the connection between the connecting fitting 12 and the upper horizontal frame 3. If necessary, this surface contact portion may be integrated via fixing means such as welding or screw fixing.

[0018] In this manner, the connecting fitting 12 and the connecting receiving fitting 11 are fastened together via connecting screws 12e, thereby connecting the vertical frame 2 and the upper horizontal frame 3. Furthermore, in this embodiment, a reinforcing fitting 13 is provided to reinforce the connecting portion. Specifically, the reinforcing fitting 13 comprises a base piece 13a that abuts the connecting fitting side straddling piece 12a from the outside in the left-right direction, a bent piece 13b that is bent outward in the left-right direction from the lower end edge of the base piece 13a, and an extended piece 13c that extends downward (bent) from the left-right outer end edge of the bent piece 13b and abuts the straddling piece protruding surface 2d of the vertical frame side straddling piece 2a, with a first screw hole 13d drilled in the base piece 13a and a second screw hole 13e drilled in the extended piece 13c. Then, by screwing the first reinforcing screw 13f, inserted through the first screw hole 13d, into the reinforcing screw hole 12d provided in the connecting fitting side straddling piece 12a, the base piece 13a and the connecting fitting 12 are integrally fastened. Meanwhile, by screwing the second reinforcing screw 13g, inserted through the straddling piece 8b of the transom vertical frame 8, into the reinforcing screw hole 2k formed in the straddling piece protruding surface 2d of the vertical frame side straddling piece 2a, the extended piece 13c and the vertical frame 2 are integrally fastened. In this way, the reinforcing fitting 13 is attached to the connecting fitting 12 and the vertical frame 2, thereby reinforcing the connection between the vertical frame 2 and the upper horizontal frame 3. In this case, the first screw 13f for fastening the reinforcing fitting 13 and the connecting fitting 12 is set to loosely penetrate the reinforcing screw hole 11e formed in the straddling piece 11c of the connecting receiving fitting 11.

[0019] In this design, the second screw 13g, which fastens the extended piece 13c to the protruding surface 2d of the vertical frame-side crossing piece 2a, also fastens the transom vertical frame 8 provided on the left-right inner side of the vertical frame 2. As a result, the fastening point between the reinforcing fitting 13 using the second screw 13g and the vertical frame-side crossing piece 2a is a three-layer structure consisting of the extended piece 13c, the protruding surface 2d of the vertical frame-side crossing piece 2a, and the transom vertical frame 8, thereby improving the reinforcing strength. Consequently, the transom vertical frame 8 not only functions as a frame for attaching the transom board 7, but also functions as a reinforcing member for reinforcing the aforementioned connecting portion, thus achieving dual-purpose functionality for the member. Furthermore, in this design, the extended piece 13c provided on the reinforcing bracket 13 is bent downwards so as to extend beyond the lower connecting bracket side leg piece 12b. The extended piece 13c is bent in such a way that it passes through (fits into) the U-shaped (recessed) notch 12f formed at the tip edge of the connecting bracket side leg piece 12b. This provides a function to prevent the extended piece 13c from shifting in the front-rear direction, thereby improving the reinforcing function.

[0020] As shown in Figures 7, 10, and 11, similar connecting and reinforcing structures are also employed between the vertical frame 2 and the transom 5. Specifically, the transom 5 also has a positioning projection 5i, similar to the case of the upper horizontal frame 3, and the connecting support fitting 14 attached to the transom 5 is also a U-shaped connecting support fitting 14 in front view, with a leg portion 14a fastened to the transom 5 via screws 14b and 10f, similar to the connecting support fitting 11 attached to the upper horizontal frame 3, and screw holes 14d and 14e are formed in the straddling portion 14c of the connecting support fitting 14. The connecting fitting 15, which is positioned on the vertical frame 2 side, is U-shaped, similar to the connecting fitting 12 provided on the upper horizontal frame 3 side, and has a straddle portion 15a and a leg portion 15b. The straddle portion 15a has connecting screw holes 15c and reinforcing screw holes 15d. The connecting fitting 15 is fastened to the connecting receiving fitting 14 by inserting a connecting screw 15e through the connecting screw hole 15c, passing through the transom through hole 2n, and screwing it into the connecting screw hole 14d, thereby connecting the vertical frame 2 and the transom 5. A notch 15f is formed at the tip edge of the leg portion 15b.

[0021] To reinforce the connection between the vertical frame 2 and the transom 5, a reinforcing bracket 16 is provided, similar to the reinforcing bracket 13 provided on the upper horizontal frame 3 side. This reinforcing bracket 16 also has a base portion 16a, a bent portion 16b, and an extended portion 16c, but the reinforcing bracket 16 for the transom 5 has the bent portion 16b and the extended portion 16c provided on the upper side, not the lower side. The reinforcing fitting 16 is fastened to the connecting fitting 15 by inserting a first screw 16f through a first screw hole 16d provided in the base piece 16a and screwing it into a reinforcing screw hole 15d provided in the connecting fitting 15. Meanwhile, the reinforcing fitting 16 and the connecting fitting 15 are fastened by inserting a second screw 16g through a straddling piece 8b of the transom vertical frame 8, passing through a reinforcing screw hole 2k provided in the straddling piece protruding surface 2d of the straddling piece 2a on the vertical frame side and screwing it into a second screw hole 16e provided in the extension piece 16c. This configuration allows for reinforcement of the connection between the vertical frame 2 and the transom 5 using the reinforcing fitting 16. In this case as well, the fastening portion by the second screw 16g is further reinforced by a three-layer structure consisting of the crossing piece 8b of the transom vertical frame 8, the crossing piece protruding surface 2d of the vertical frame side crossing piece 2a, and the extended piece 16c. Similar to the case of the upper horizontal frame 3, the transom vertical frame 8 is also used as a reinforcing member to reinforce the connection between the transom 5 and the vertical frame 2.

[0022] Finally, regarding the connection structure between the lower horizontal frame 4 and the vertical frame 2, as shown in Figures 6, 12, and 13, the lower horizontal frame 4 is provided with an L-shaped connecting bracket 17. The lower part 17a of the connecting bracket 17 is welded to the left and right edges of the rail groove portion 4c of the lower horizontal frame's straddling portion 4a. The vertical part 17c of the connecting bracket 17 is bent upward from the lower part 17a so that its upper edge reaches the upper edge of the straddling portion 4a, while remaining within the front-to-back width of the rail portion 4c. Incidentally, the auxiliary member 20a incorporated into the edge of the rail portion 4c constitutes a sweeping member having an inclined surface 20b for sweeping out debris (impurities) that have entered the lower rail 20. In contrast, a box-shaped connecting fitting 18 is provided in the through-hole 2o for the lower horizontal frame formed at the lower end edge of the vertical frame 2. The connecting fitting 18 is positioned so that the tip edges of the upper and lower leg pieces 18b abut against the bottom surface 2c of the straddling piece. The screws 18c inserted from the straddling piece 18a of the connecting fitting 18, which is positioned outward in the left-right direction, are screwed into the screw holes 17d provided in the vertical piece 17c on the connecting receiving fitting side, passing through the through-hole 2r formed in the protruding surface 2d of the straddling piece. This allows the vertical frame 2 and the lower horizontal frame 4 to be connected. The connecting portion, which is connected in this manner, is further reinforced with a reinforcing fitting 19. The reinforcing fitting 19 is L-shaped, with its horizontally oriented lower piece 19a fastened to the upper leg piece 18b of the connecting fitting 18 via a screw 19b, and its vertical piece 19c fastened to the straddling protruding surface 2d of the straddling piece 2b on the vertical frame side via a screw 19d, thereby reinforcing the connecting portion.

[0023] In this embodiment, configured as described above, the vertical frame 2 and the upper horizontal frame 3, and the vertical frame 2 and the transom 5 are connected by fastening connecting fittings 12 and 15, which are located on the vertical frame 2 side, to connecting receiving fittings 11 and 14, which are provided on the upper horizontal frame 3 and the transom 5, respectively, via connecting screws 12e and 15e. These connection points are reinforced using reinforcing fittings 13 and 16, which are provided on the connecting fittings 12 and 15, respectively. To give a concrete example of the reinforcing structure at the connection point between the vertical frame 2 and the transom 5, the transom 5 has a straddle portion 5a and a leg portion 5b. With the left and right outer end portion 5h of the transom 5 abutting against the left and right outer edge portion 5h of the transom 5, the connection between the vertical frame 2 and the transom 5 is achieved by fastening a connecting screw 15e, inserted from a connecting fitting 15 located on the left and right outer side of the straddle portion 2a of the vertical frame, to a connecting receiving fitting 14 provided on the transom 5, passing through a transom through-hole 2n provided on the straddle portion 2a of the vertical frame. In this case, the reinforcing fitting 16 provided to reinforce the connecting portion is composed of a base portion 16a and an extension portion 16c, with the base portion 16a fastened to the connecting fitting 15 via a first connecting screw 16f, and the extension portion 16c fastened to the upper vertical frame side straddling portion 2a via a second connecting screw 16g. As a result, the connecting fitting 15 becomes a reinforced structure fastened to the vertical frame side straddling portion 2b via the extension portion 16c of the reinforcing fitting 16 which is integrated with the connecting fitting 15, thereby increasing its strength and improving seismic resistance.

[0024] In this case, the connecting fitting 15 has a U-shaped cross-section with a straddling piece 15a facing the straddling piece 2a on the vertical frame side and upper and lower leg pieces 15b. The reinforcing fitting 16 is formed by bending from the base piece so that the base piece 16a faces the straddling piece 15a on the connecting fitting side and the extension piece 16c extends beyond the leg piece on the connecting fitting side. In this case, the extension piece 16c provided on the reinforcing fitting 16 is formed by bending at the notched portion 15f formed at the tip edge of the leg piece 15a on the connecting fitting side, and comes into contact with the straddling piece protruding surface portion 2d of the straddling piece 2a on the vertical frame side. It is fastened at the contact portion via a screw 16g, which promotes integration and contributes to increasing the strength of the connecting part.

[0025] Furthermore, in this design, the vertical frame-side straddle portion 2a is provided with straddle bottom surfaces 2c on both the front and rear sides, and a straddle protruding surface 2d located between the two straddle bottom surfaces 2c and projecting outward in the left-right direction from the straddle bottom surfaces 2c. A through hole 2n for the transom 5 is formed therein, with a length extending from the straddle protruding surface 2d to a part of both straddle bottom surfaces 2c. The connecting fitting-side straddle portion 15a passes through the straddle protruding surface 2d portion of the transom through hole 2n, and both front and rear side portions abut the front-rear outer surfaces of the straddle bottom surfaces 2c. In this case, the transom-side straddle portion 5a is provided with a positioning projection 5i that abuts the lower inner peripheral edge 2p of the transom through hole 2n. As a result, the positioning of the transom 5 relative to the vertical frame 2 (positioning in the up, down, left, and right directions) can be easily performed, improving the work when connecting the vertical frame 2 and the transom 5. Moreover, in this case, the positioning projection 5i is in surface contact with the lower leg portion 15b of the connecting fitting 15, resulting in the positioning projection 5i and the lower leg portion 15b of the connecting fitting 15 being stacked together, which contributes to improving the reinforcing function.

[0026] Furthermore, in this design, the tip edge of the connecting fitting side leg piece 15b protrudes outward in the left-right direction compared to the straddling piece protruding surface, ensuring secure fitting of the connecting fitting 15 into the vertical frame 2. A notch 15f is formed at the tip edge of the connecting fitting side leg piece 15b, so that the bent portion of the extension piece 16c of the reinforcing fitting 16 is in approximately the same position (same position in the left-right direction) as the straddling piece protruding surface 2d of the vertical frame 2. As a result, the connection of the reinforcing fitting side extension piece 16c to the straddling piece protruding surface 2d becomes secure, and the structure is simplified. Furthermore, in this case, a transom vertical frame 8 is provided at the point where the straddling protruding surface portion 2d and the extended portion 16c are fastened together. As a result, the extended portion 16c is fastened together with the transom vertical frame 8 in a three-layer structure, and the transom vertical frame 8 doubles as a reinforcing member, thereby reinforcing the fastening point and increasing strength while also achieving a reduction in the number of parts due to the dual use of components.

[0027] In this way, the connection between the vertical frame 2 and the transom 5 is reinforced using the reinforcing fitting 16, resulting in an excellent earthquake-resistant structure. This type of reinforcement structure also exhibits the same effect at the connection between the vertical frame 2 and the upper horizontal frame 3, except that the extension direction of the reinforcing fitting side extension piece 13c is downward.

[0028] It should be noted that the present invention is not limited to the above-described embodiments. In the above embodiments, the present invention was implemented in the connection between the vertical frame 2 and the upper horizontal frame 3, and in the connection between the vertical frame 2 and the transom 5. However, it may be implemented in only one of these locations if necessary, and it may also be applied to the connection between the vertical frame 2 and the lower horizontal frame 4. Furthermore, in the above embodiment, the reinforcing fittings 13 and 16 for carrying out the present invention were provided with extension pieces 13c and 16c in one of the vertical directions. However, the invention is not limited to this, and for example, as shown in the second embodiment in Figure 16, the extension piece 16c provided on the reinforcing fitting may be extended both vertically and horizontally at the connection between the vertical frame 2 and the transom 5. This would further increase the strength. [Industrial applicability]

[0029] This invention can be used as a reinforcing structure for the connecting parts of vertical and horizontal frames that constitute frame materials such as door frames installed in entrances and partitions in buildings such as office buildings and houses. [Explanation of Symbols]

[0030] 1 unit slot 2 Vertical frame 2a straddle part 2b Leg piece 2c Straddle bottom part 2d Straddle protruding surface part 2m through hole for upper horizontal frame 2n Through hole for no eyes 3. Upper horizontal frame 3a straddle section 3b Leg piece 3i Positioning projection 5 No object 5a straddle part 5b Leg piece 7. Transom board 8. Vertical frame for transom 11. Connecting bracket 11a Leg piece 11c straddle section 12 Connecting fittings 12a Straddle part 12b Leg piece 12c connecting screw holes 12d Reinforcement screw holes 12e Connecting screws 13 Reinforcement fittings 13a Base piece 13c Extension piece 13d First screw hole 13e Second screw hole 14. Connecting bracket 14a Leg piece 14c straddle section 15 Connecting fittings 15a straddle section 15b Leg piece 15c connecting screw holes 15d Reinforcement screw holes 15e Connecting screws 16 Reinforcement fittings 16a Base piece 16c Extension piece 16d First screw hole 16e Second screw hole

Claims

1. The system comprises vertical and horizontal frames having a straddling portion and a leg portion, with the left and right outer edge of the horizontal frame abutting against the left and right inner edge of the straddling portion on the vertical frame side, In a connection section of vertical and horizontal frames, the vertical and horizontal frames are connected by fastening connecting screws, inserted from connecting fittings located on the left and right outer sides of the vertical frame's crossing piece, to a connecting receiving fitting provided on the horizontal frame's crossing piece, so that the screws pass through the vertical frame's crossing piece. When reinforcing the connecting portion using reinforcing fittings, The reinforcing fitting comprises a base piece disposed on the left-right outer side of the connecting fitting, a bent piece bent outward from the base piece, and an extended piece extending from the bent piece so as to face the left-right outer surface of the vertical frame side straddling piece, wherein the base piece is fastened to the connecting fitting via a first reinforcing screw, and the extended piece is fastened to the vertical frame side straddling piece via a second reinforcing screw, thus forming a reinforcing structure for the connecting portion of a vertical and horizontal frame.

2. The connecting fitting has a U-shaped cross-section, comprising a straddling piece facing the vertical frame side straddling piece and upper and lower leg pieces. The reinforcing structure for the connecting portion of vertical and horizontal frames according to claim 1, characterized in that the reinforcing fitting has a base portion that faces the connecting fitting side straddling portion and an extended portion that is bent from the base portion so as to extend beyond the connecting fitting side leg portion.

3. The vertical frame side straddling portion is composed of straddling bottom surfaces on both the front and rear sides, and straddling protruding surfaces located between these two straddling bottom surfaces and projecting outward in the left-right direction from the straddling bottom surfaces. The vertical frame side straddling portion has a through hole formed therein, which extends from the straddling portion's protruding surface to a part of the bottom surface of both straddling portions, through which the connecting screw passes. The connecting fitting's straddle portion is positioned so that it penetrates the straddle portion's protruding surface portion of the through hole, with both front and rear side portions contacting the surface portion of the straddle portion's bottom surface that is outside the through hole in the front-rear direction. The reinforcing structure for the connecting portion of a vertical and horizontal frame according to claim 2, characterized in that the horizontal frame side straddling piece is provided with a positioning projection for positioning the horizontal frame relative to the vertical frame by abutting against the inner peripheral edge of the through hole.

4. The reinforcing structure in the connecting portion of vertical and horizontal frames according to claim 3, characterized in that the positioning projection is opposite to the lower leg portion of the connecting fitting.

5. The leg portion on the connecting fitting side has a tip edge that protrudes outward in the left-right direction compared to the protruding surface portion of the straddling piece. A notch is formed at the tip edge of the leg portion of the connecting fitting such that at least the portion corresponding to the extension portion of the reinforcing fitting is in approximately the same position as the protruding surface portion of the straddling piece. The reinforcing structure in the connecting portion of vertical and horizontal frames according to claim 3 or 4, characterized in that the reinforcing fitting extension portion is bent at the notched portion of the connecting fitting side leg portion and abuts against the crossing portion protruding surface of the vertical frame side crossing portion.

6. The reinforcing structure in the connecting portion of vertical and horizontal frames according to claim 5, characterized in that a vertical frame for transoms is provided at the portion where the straddling protruding surface portion and the extended portion are fastened together, and the extended portion is fastened together with the vertical frame for transoms to form a three-layer structure, so that the vertical frame for transoms acts as a reinforcing member.

7. The reinforcing structure for the connecting portion of a vertical and horizontal frame according to any one of claims 1 to 6, characterized in that a pair of extended pieces are formed extending from the base piece in both the vertical and horizontal directions.

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