Joint structure

Abstract

To satisfactorily join ends of a pair of steel plates butted against each other in a predetermined butting direction on the same plane while improving the design in a joint structure in which the ends of the pair of steel plates are joined by bolts via a splice plate.SOLUTION: Comb tooth portions 1A and 2A formed of a plurality of convex portions 1Aa and 2Aa arranged in parallel in a width direction D2 intersecting a butt direction D1 in the in-plane direction of a pair of steel plates 1 and 2 are formed at ends 1a and 2a of the steel plates 1 and 2, respectively. Also, the ends 1a and 2a of the pair of steel plates 1 and 2 are butted against each other with the comb tooth portions 1A and 2A interlocking with each other. Bolt insertion holes are formed in each of the plurality of convex portions 1Aa and 2Aa. Each of the ends 1a and 2a of the pair of steel plates 1 and 2 is fastened to a splice plate 7 by bolts 4 inserted into the bolt insertion holes.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a joining structure in which a pair of steel plate ends abutted in a predetermined abutting direction in the same plane are joined by bolts via a splice plate.

Background Art

[0002] In a joining structure in which a pair of steel plate ends such as the webs of H-shaped steel or flat steel are joined by bolts in a state of being abutted in the same plane, a splice plate is arranged along the pair of steel plate ends, and each of the pair of steel plate ends is fastened to the splice plate by bolts inserted through bolt insertion holes formed in each of the pair of steel plate ends (see, for example, Patent Document 1). In the joining structure described in Patent Document 1, each of the pair of steel plate ends is linearly formed along the width direction intersecting the abutting direction in the in-plane direction of the steel plate. Therefore, in a state where these pair of steel plate ends are abutted, the bolt insertion holes formed in each of the pair of steel plate ends are arranged on both sides of the abutting direction with a linear boundary portion interposed therebetween. And each of the pair of steel plate ends is fastened to the splice plate by bolts inserted through the bolt insertion holes arranged on both sides with the boundary portion interposed therebetween.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the joint structure described in Patent Document 1, the bolt insertion holes formed in each of the pair of steel plate ends are spaced apart to some extent on both sides in the butt joint direction, straddling the straight boundary between the pair of steel plate ends. As a result, the length of the splice plate fastened by the bolts inserted through these bolt insertion holes in the butt joint direction becomes relatively long. Consequently, it becomes difficult to conceal the joint between the pair of steel plate ends, including this splice plate, from the outside. If an attempt is made to conceal it, a relatively large finishing material would be required, making it difficult to improve the aesthetic appearance. In view of these circumstances, the main objective of the present invention is to provide a technology that can join a pair of steel plate ends that are butted together in a predetermined butt joint direction within the same plane, using bolts via a splice plate, while improving the aesthetic appearance. [Means for solving the problem]

[0005] The first characteristic configuration of the present invention is a joining structure in which a pair of steel plate ends that are butted together in a predetermined abutting direction within the same plane are joined together by bolts via a splice plate, Each of the pair of steel plate ends has a comb-like structure formed thereon, consisting of multiple protrusions arranged in a width direction intersecting the butt joint direction in the in-plane direction of the steel plate, and the pair of steel plate ends are butted together with the comb-like structures interlocked with each other. The key feature is that each of the aforementioned multiple protrusions has a bolt insertion hole, and the pair of steel plate ends are fastened to the splice plate by bolts inserted through these bolt insertion holes.

[0006] In this configuration, a pair of steel plate ends are butted together in the butt joint direction, with the comb-like teeth formed on each end interlocking with each other within the same plane. As a result, the multiple protrusions on each of the comb-like teeth of the pair of steel plate ends are arranged in a line along the width direction intersecting the butt joint direction, and the multiple bolt insertion holes formed on each of these protrusions are contained within a relatively short range in the butt joint direction. Therefore, a relatively short and compact splice plate can be used for fastening with bolts inserted through the bolt insertion holes formed on each of the multiple protrusions, and the joint between the pair of steel plate ends, including the splice plate, can be easily concealed from the outside in order to improve the aesthetic appearance. Therefore, the present invention provides a technology that enables good joining of a pair of steel plate ends, which are butted together in a predetermined butt joint direction within the same plane, by bolts via a splice plate, while improving aesthetic appeal.

[0007] A second characteristic feature of the present invention is that the length of the splice plate along the butt joint direction is set within the range between the base ends of the protrusions at each of the pair of steel plate ends.

[0008] According to this configuration, the length of the splice plate along the butt joint direction is set within the range between the base ends of the protrusions on each of the pair of steel plate ends that are butted together with their comb teeth interlocked. Therefore, bolt insertion holes can be formed only on the multiple protrusions of the comb teeth, and each of the pair of steel plate ends can be fastened to the splice plate with bolts inserted through these bolt insertion holes. Furthermore, in the butt joint direction described above, the splice plate will be contained within the range where the comb teeth of each end of the pair of steel plates exist, thus allowing them to be easily concealed from the outside.

[0009] A third characteristic feature of the present invention is that, in each of the pair of steel plate ends, the bolt insertion holes formed in each of the plurality of protrusions are arranged in the same row along the width direction.

[0010] According to this configuration, in the multiple protrusions arranged side by side along the width direction, the bolt insertion holes formed in the multiple protrusions are arranged in the same row along the width direction. As a result, the bolt insertion holes formed in each of the multiple protrusions are contained within a very short range in the butt joint direction. Therefore, the length of the splice plate along the butt joint direction can be further shortened, and these can be concealed from the outside more easily. [Brief explanation of the drawing]

[0011] [Figure 1] A perspective view showing the state of the joint structure of this embodiment before joining. [Figure 2] A perspective view showing the state of the joint structure of this embodiment after joining. [Figure 3] Front view showing the configuration of the joint structure of the first embodiment. [Figure 4] Cross-sectional view AA in Figure 3 [Figure 5] Front view showing the configuration of the joint structure of the second embodiment. [Figure 6] BB cross-section view (Figure 5) [Modes for carrying out the invention]

[0012] Embodiments of the present invention will be described with reference to the drawings.

[0013] [Basic configuration] First, the basic configuration of the joint structure X of this embodiment will be explained based on Figures 1 and 2. The joining structure X is a structure for joining the respective ends 1a and 2a of a pair of steel plates, a first steel plate 1 and a second steel plate 2, which are butted together in a predetermined butt joint direction D1 within the same plane, using bolts 4 and nuts via a splice plate 7. Figure 1 shows the state before joining them, where the end 1a of the first steel plate 1 and the end 2a of the second steel plate 2, which are in the same plane, are positioned abutting against each other in the abutting direction D1. Figure 2 shows the state after joining the end 1a of the first steel plate 1 and the end 2a of the second steel plate 2, which are positioned in this manner. The joining structure X employs a distinctive configuration for effectively joining the ends 1a and 2a of the first steel plate 1 and the second steel plate 2 while improving aesthetic appeal, and its details are described below.

[0014] As shown in Figure 1, each end 1a, 2a of the pair of steel plates 1, 2 has comb-shaped sections 1A, 2A formed thereon, consisting of multiple protrusions 1Aa, 2Aa arranged in parallel in the width direction D2, which intersects the butt joint direction D1 in the in-plane direction of the steel plates 1, 2. Specifically, in the comb-shaped section 1A formed on the end 1a of the first steel plate 1, multiple protrusions 1Aa of approximately equal width are formed at equal intervals along the width direction D2, projecting toward the end 2a of the second steel plate 2 along the butt joint direction D1. On the other hand, in the comb-shaped section 2A formed on the end 2a of the second steel plate 2, multiple protrusions 2Aa of approximately equal width are formed at equal intervals along the width direction D2, projecting toward the end 1a of the first steel plate 1 along the butt joint direction D1.

[0015] As shown in Figure 1, the respective ends 1a and 2a of the pair of steel plates 1 and 2 are butted together with their respective comb-tooth portions 1A and 2A interlocked. That is, when the end 1a of the first steel plate 1 and the end 2a of the second steel plate 2 are butted together, the protrusions 1Aa of the comb-tooth portion 1Aa on the first steel plate 1 side and the protrusions 2Aa of the comb-tooth portion 2Aa on the second steel plate 2 side are arranged alternately along the width direction D2. A small gap is formed between adjacent protrusions 1Aa and 2Aa, and between the tips of the protrusions 1Aa and 2Aa on the other steel plate 1 and 2 side relative to the ends 1a and 2a of one steel plate 1 and 2 side, to compensate for any misalignment of the relative positions of the pair of steel plates 1 and 2.

[0016] Each of the plurality of convex portions 1Aa and 2Aa has a bolt insertion hole 1B and 2B formed therein. That is, bolt insertion holes 1B are formed in substantially the central portions of each of the plurality of convex portions 1Aa that constitute the comb teeth portion 1A on the first steel plate 1 side, and bolt insertion holes 2B are formed in substantially the central portions of each of the plurality of convex portions 2Aa that constitute the comb teeth portion 2A on the second steel plate 2 side.

[0017] As shown in FIG. 2, the ends 1a and 2a of the pair of steel plates 1 and 2 are fastened to the splice plate 7 by bolts 4 and nuts inserted through both bolt insertion holes 1B and 2B, and the ends 1a and 2a are joined together. That is, the splice plate 7 is composed of a flat steel that is long in the width direction D2 in a form that spans the entire plurality of convex portions 1Aa on the first steel plate 1 side and the plurality of convex portions 2Aa on the second steel plate 2 side. And, as shown in FIG. 1, the splice plate 7 has a plurality of bolt insertion holes 7B formed corresponding to each of the plurality of bolt insertion holes 1B formed on the first steel plate 1 side and the plurality of bolt insertion holes 2B formed on the second steel plate 2 side.

[0018] And the splice plate 7 is arranged in a state following the plurality of convex portions 1Aa and 2Aa arranged side by side along the width direction D2 on the first steel plate 1 side and the second steel plate 2 side. In addition, in this embodiment, the plate thicknesses of the first steel plate 1 and the second steel plate 2 are the same, but when the plate thicknesses are different, a filler material for filling the gap with the splice plate 7 may be appropriately interposed. With respect to the splice plate 7 arranged as described above, each of the ends 1a and 2a of the pair of steel plates 1 and 2 is fastened by a plurality of bolts 4 and nuts inserted through the bolt insertion holes 1B and 2B formed in each of the plurality of convex portions 1Aa and 2Aa and the respective bolt insertion holes 7B formed in the splice plate 7. In addition, the splice plate 7 can also be provided only on one side of the ends 1a and 2a of the pair of steel plates 1 and 2, but as shown in FIG. 2, by arranging the splice plate 7 on both sides of the ends 1a and 2a of the pair of steel plates 1 and 2, a strong joint is realized.

[0019] The width of the splice plate 7, which is the length along the butt joint direction D1, is set within the range between the base ends 1Ab and 2Ab of the protrusions 1Aa and 2Aa at the respective ends 1a and 2a of the pair of steel plates 1 and 2. Specifically, the width of the splice plate 7 is set to be equal to the width between the tips of the protrusions 1Aa and 2Aa at the respective ends 1a and 2a of the pair of steel plates 1 and 2. In this way, the splice plate 7 is fitted only to the multiple protrusions 1Aa and 2Aa of the comb-tooth portions 1A and 2A at the respective ends 1a and 2a of the pair of steel plates 1 and 2, and bolt insertion holes 1B and 2B are formed only at these multiple protrusions 1Aa and 2Aa. The splice plate 7 is compact enough to fit within the range where the comb-tooth portions 1A and 2A of the respective ends 1a and 2a of the pair of steel plates 1 and 2 exist in the butt joint direction D1, and can be easily concealed from the outside.

[0020] At the respective ends 1a and 2a of the pair of steel plates 1 and 2, the bolt insertion holes 1B and 2B formed in the multiple protrusions 1Aa and 2Aa are arranged in the same row along the width direction D2. Specifically, each bolt insertion hole 1B and 2B is arranged in a single row along the width direction D2. As a result, each bolt insertion hole 1B and 2B is contained within a very short range in the butt joint direction D1, so the splice plate 7 has an even smaller width and can be concealed from the outside even more easily.

[0021] The above describes the basic configuration of the joint structure X. Below, we will explain in order the joint structures of the first and second embodiments, which are examples of its application.

[0022] [First Example] As an example of the application of the aforementioned joint structure X (see Figures 1 and 2), the configuration of the joint structure X1 of the first embodiment will be explained based on Figures 2 and 3. In the following explanation, detailed descriptions of configurations similar to the aforementioned joint structure X (see Figures 1 and 2) may be omitted.

[0023] The joint structure X1 in this embodiment is a structure that joins the lower gusset plate 13 and the lower mullion material 20 of the wind-resistant beam 10. In other words, in the joint structure X1, the lower end portion 13a of the lower gusset plate 13, which is a steel plate fixed to the lower side of the wind-resistant beam 10, and the upper end portion 20a of the lower mullion material 20, which is a steel plate, are butted together in a vertical abutting direction D1 that is perpendicular to the extending direction of the wind-resistant beam 10, and are joined together by bolts 24 and nuts via a pair of splice plates 27 provided on both sides.

[0024] The lower end portion 13a of the lower gusset plate 13 has a comb-tooth portion 13A formed thereon, consisting of three protrusions 13Aa arranged side by side in the width direction D2, which is the horizontal direction within its plane. On the other hand, the upper end portion 20a of the lower mullion material 20 has a comb-tooth portion 20A formed thereon, consisting of two protrusions 20Aa arranged side by side in the width direction D2. Then, the lower end portion 13a of the lower gusset plate 13 and the upper end portion 20a of the lower mullion material 20 are butted together along the abutting direction D1 with their respective comb-tooth portions 13A and 20A interlocked.

[0025] A pair of splice plates 27 are positioned so as to rest against both sides of the multiple protrusions 13Aa, 20Aa that are aligned along the width direction D2 in the comb-tooth portions 13A, 20A of the lower gusset plate 13 and the lower mullion material 20, which are butted together as described above. Since the thickness of the lower gusset plate 13 is thinner than that of the lower mullion material 20, filler material 28 is interposed on both sides of the protrusions 13Aa of the lower gusset plate 13 to fill the gap between it and the splice plates 27. Then, the pair of ends 13a and 20a of the lower gusset plate 13 and the lower mullion material 20 are joined together by bolts 24 and nuts inserted through bolt insertion holes 13B and 20B formed in the multiple protrusions 13Aa and 20Aa and bolt insertion holes 27B formed in the splice plate 27.

[0026] In short, comparing the configurations of the joint structure X1 in this embodiment shown in Figures 3 and 4 with the configurations of the joint structure X shown in Figures 1 and 2 described above, the lower end portion 13a of the lower gusset plate 13 and the upper end portion 20a of the lower mullion material 20 in joint structure X1 correspond to the end portion 1a of the first steel plate 1 and the end portion 2a of the second steel plate 2 in joint structure X. Also, the comb-tooth portions 13A, 20A and the multiple protrusions 13Aa, 20Aa constituting them in joint structure X1 correspond to the comb-tooth portions 1A, 2A and the multiple protrusions 1Aa, 2Aa constituting them in joint structure X. Furthermore, the splice plate 27 and bolt 24 in joint structure X1 correspond to the splice plate 7 and bolt 4 in joint structure X.

[0027] The wind-resistant beam 10 is composed of a horizontal plate portion 11 extending in the horizontal plane and vertical plate portions 12 extending downward from both ends (left and right in Figure 3). The lower gusset plate 13 is provided between the pair of vertical plate portions 12 in a position perpendicular to these plate portions 11 and 12. Therefore, the wind-resistant beam 10 has a groove portion 10a that is open at the bottom and surrounded by the horizontal plate portion 11 and the pair of vertical plate portions 12, and the lower gusset plate 13 is arranged to be housed within this groove portion 10a. Although this does not limit the configuration of the joint structure X1, as shown in Figure 4, a plurality of lower mullion members 20 are arranged along the extending direction of the wind-resistant beam 10, and the joint structure X1 is applied to each joint of the plurality of lower mullion members 20 to the wind-resistant beam 10.

[0028] Furthermore, similar to the joint structure X shown in Figures 1 and 2, the width of the splice plate 27 in the joint structure X1 shown in Figure 3 (length along the vertical direction D1 in Figure 3) is set to be small enough to be within the range between the base ends 13Ab and 20Ab of the protrusions 13Aa and 20Aa at each of the respective ends 13a and 20a. Thus, the joint structure X1 can be appropriately housed in the groove 10a of the wind-resistant beam 10 and appropriately concealed from the outside.

[0029] Furthermore, the upper mullion material 25 is joined to the upper surface of the wind-resistant beam 10 via an upper gusset plate 15 fixed to the upper surface of the horizontal plate portion 11 of the wind-resistant beam 10.

[0030] [Second Example] As an example of applying the aforementioned joint structure X (see Figures 1 and 2), the configuration of the joint structure X2 of the second embodiment will be explained based on Figures 5 and 6. In the following explanation, detailed descriptions of configurations similar to the aforementioned joint structure X (see Figures 1 and 2) may be omitted.

[0031] The joining structure X2 in this embodiment is a structure that joins the support plate 31 of the handrail 30 to the bracket 42 of the vertical furring strip 41. In other words, in the joint structure X2, the lower rear end 31a (lower left in Figure 5) of the support plate 31, which is a steel plate of the handrail 30, and the front end 42a (right in Figure 5) of the bracket 42 fixed to the vertical furring strip 41 are butted together in a horizontal abutting direction D1 within the same vertical plane perpendicular to the direction in which the multiple support plates 31 are arranged side by side (left-right direction in Figure 6), and are joined together by bolts 44 and nuts via a pair of splice plates 47 provided on both sides.

[0032] The lower rear end 31a of the support plate 31 has a comb-tooth portion 31A formed thereon, consisting of two protrusions 31Aa arranged side by side in the width direction D2, which is the vertical direction within its plane. On the other hand, the front end 42a of the bracket 42 has a comb-tooth portion 42A formed thereon, consisting of two protrusions 42Aa arranged side by side in the width direction D2. Then, the lower rear end 31a of the support plate 31 and the front end 42a of the bracket 42 are butted together along the abutting direction D1 with their respective comb-tooth portions 31A and 42A interlocked.

[0033] The pair of splice plates 27 are positioned so as described above, resting against both sides of the multiple protrusions 31Aa and 42Aa that are aligned along the width direction D2 in the comb-tooth portions 31A and 42A of the support plate 31 and bracket 42. The thickness of the support plate 31 and bracket 42 are approximately the same. Then, the bolts 44 and nuts inserted through the bolt insertion holes 31B and 42B formed in the multiple protrusions 31Aa and 42Aa, and the bolt insertion holes 47B formed in the splice plate 47, join the pair of ends 31a and 42a of the support plate 31 and the bracket 42.

[0034] In short, comparing the configurations of the joint structure X2 shown in Figures 5 and 6 with the configurations of the joint structure X shown in Figures 1 and 2 above, the lower rear end 31a of the support plate 31 and the front end 42a of the bracket 42 in joint structure X2 correspond to the end 1a of the first steel plate 1 and the end 2a of the second steel plate 2 in joint structure X. Also, the comb-toothed parts 31A, 42A and the multiple protrusions 31Aa, 42Aa constituting them in joint structure X2 correspond to the comb-toothed parts 1A, 2A and the multiple protrusions 1Aa, 2Aa constituting them in joint structure X. Furthermore, the splice plate 47 and bolt 44 in joint structure X2 correspond to the splice plate 7 and bolt 4 in joint structure X.

[0035] The vertical furring strips 41 are surrounded by finishing materials such as roof sheathing, exterior siding, and coping to form a low wall 40. Furthermore, a trim piece 32, which is a steel plate projecting from the support plate 31 toward the parapet 40 in a horizontal position that covers the upper part of the joint structure X1, is fixed to the middle portion of the support plate 31 of the handrail 30. Although this does not limit the configuration of the joint structure X2, as shown in Figure 6, multiple brackets 42 of the support plate 31 of the handrail 30 and the vertical furring strips 41 are arranged side by side, and the joint structure X2 is applied to each of the joints. In addition, a finishing material 49 is provided along the vertical plane including the front ends of the trim piece 32 and the multiple support plates 31, and the joint structure X2 housed between the parapet 40 and the support plate 31 is concealed by this trim piece 32 and finishing material 49.

[0036] Furthermore, similar to the joint structure X shown in Figures 1 and 2, the width of the splice plate 47 in the joint structure X2 shown in Figure 3 (length along the horizontal direction D1 in Figure 5) is set to be small enough to be within the range between the base ends 31Ab and 42Ab of the protrusions 31Aa and 42Aa at each end 31a and 42a. Therefore, even when the support plate 31 of the handrail 30 is brought close to the parapet wall 40, the joint structure X2 can be appropriately housed between them and properly concealed from the outside.

[0037] [Another embodiment] Other embodiments of the present invention will now be described. Note that the configurations of each embodiment described below are not limited to being applied individually, but can also be applied in combination with the configurations of other embodiments.

[0038] (1) In the above embodiment, the width of the splice plates 7, 27, and 47 (length along the butt joint direction D1) was set within the range between the base ends 1Ab, 13Ab, and 31Ab of the protrusions 1Aa, 13Aa, and 31Aa at the ends 1a, 13a, and 31a of the first steel plates 1, 13, and 31a, and the base ends 2Ab, 20Ab, and 42Ab of the protrusions 2Aa, 20Aa, and 42Aa at the ends 2a, 20a, and 42a of the second steel plates 2, 20, and 42a. However, the width of the splice plates 7, 27, and 47 may be changed as appropriate.

[0039] (2) In the above embodiment, the bolt insertion holes 1B, 13B, 31B formed in the protrusions 1Aa, 13Aa, 31Aa at the ends 1a, 13a, 31a of the first steel plate 1, 13, 31, and the bolt insertion holes 2B, 20B, 42B formed in the protrusions 2Aa, 20Aa, 42Aa at the ends 2a, 20a, 42a of the second steel plate 2, 20, 42, are arranged in a row along the width direction D2. However, they may be arranged in multiple rows as appropriate, or they may not be arranged in the same row. [Explanation of Symbols]

[0040] 1,2 Steel plate 1A, 2A Comb teeth part 1Aa, 1Ab convex part 1Ab,2Ab proximal end 1B, 2B Bolt insertion holes 1a,2a end 4 bolts 7 Splice Plate 13. Lower gusset plate (steel plate) 13A Comb teeth part 13Aa protrusion 13Ab proximal end 13B Bolt insertion hole 13a Lower end (steel plate end) 20 Lower mullion material (steel plate) 20A comb tooth part 20Aa convex part 20Ab proximal end 20B Bolt insertion hole 20a Upper end (steel plate end) 24 volts 27 Splice Plate 31. Support plate (steel plate) 31A Comb teeth part 31Aa protrusion 31Ab proximal end 31B Bolt insertion hole 31a Lower back end (steel plate end) 42 Bracket (steel plate) 42A Comb teeth part 42Aa protrusion 42Ab proximal end 42B Bolt insertion hole 42a Front end (end of steel plate) 44 volts 47 Splice Plate D1 Butt joint direction D2 width direction X-joint structure X1 joint structure X2 joint structure

Claims

1. A joining structure in which a pair of steel plate ends that are butted together in a predetermined abutting direction within the same plane are joined together by bolts via a splice plate, Each of the pair of steel plate ends has a comb-like structure formed thereon, consisting of multiple protrusions arranged in a width direction intersecting the butt joint direction in the in-plane direction of the steel plate, and the pair of steel plate ends are butted together with the comb-like structures interlocked with each other. A joining structure in which bolt insertion holes are formed in each of the plurality of protrusions, and each of the pair of steel plate ends is fastened to the splice plate by bolts inserted through the bolt insertion holes.

2. The joining structure according to claim 1, wherein the length of the splice plate along the butt direction is set to be within the range between the base ends of the protrusions at each of the pair of steel plate ends.

3. The joining structure according to claim 1 or 2, wherein, in each of the pair of steel plate ends, the bolt insertion holes formed in each of the plurality of protrusions are arranged in the same row along the width direction.

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