Shear support hardware and structures using the same shear support hardware

Abstract

To prevent sear rigidity from deteriorating even in the case where an escape such as a gap and the like is provided at a hardware fitting recess provided at wood, and to eliminate the necessity of wood processing for avoiding interference with a weld part at the hardware fitting recess, even in the case of joining by welding.SOLUTION: Shear receiving hardware includes: a circular plate 11 where a bolt hole 11a through which a shaft part of a bolt passes is provided; and a cylindrical outside cylinder part 12 having a predetermined height in a thickness direction of the circular plate 11 on an outer periphery of the circular plate 11. The circular plate 11 is joined with the outside cylinder part 12 only on one side surface (welded surface 11e) in the circular plate 11 by welding, at a position receded to the inside at least from one end part in the thickness direction of the circular plate 11 in the outside cylinder part 12, and a welded part 14 does not appear on a side surface (non-welded surface 11f) on the opposite side, and it is fitted in such a manner that the side surface (non-welded surface 11f) on the opposite side comes into contact with a surface of the hardware fitting recess.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a shear receiving metal fitting that is fitted into a recess for fitting metal fittings in wood and receives the shear force generated in the wood, and a structure using the shear receiving metal fitting.

Background Art

[0002] As a shear receiving metal fitting used when fastening with bolts and nuts, for example, a circular plate provided with a hole penetrating through the front and back in the center (referred to as the "bottom wall portion" in Patent Document 1), and an outer cylindrical portion erected along the entire outer circumference of the circular plate (referred to as the "side wall portion" in Patent Document 1). A structure has been proposed in which a connecting pin is inserted or screwed into the hole so that all or part of the shear load acting on the connecting pin is supported by the outer cylindrical portion (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] By the way, as in the above-mentioned Patent Document 1, the shear receiving metal fitting is used by fitting it into wood, and it is necessary to provide a recess for fitting metal fittings on the wood side to fit the shear receiving metal fitting. However, depending on the region, since the number of pre-cut factories capable of special processing is limited, it is necessary to provide the recess for fitting metal fittings by manual processing. Considering the accuracy of manual processing, it is necessary to consider a clearance or the like in the recess for fitting metal fittings provided in the wood in order to accommodate the shear receiving metal fitting.

[0005] However, in the shear support hardware disclosed in Patent Document 1 mentioned above, the larger the outer diameter of the circular plate of the shear support hardware, the larger the area of ​​the outer cylinder and the higher the shear strength. However, if the outer diameter is large or the height of the side wall is deep, it becomes impossible to integrally mold it by press working, and it must be formed by cast iron or welding. When manufacturing the shear support hardware by welding, wood processing is required to avoid interference of the welded part of the shear support hardware in the recess for fitting the hardware. On the other hand, when manufacturing it from cast iron, although interference of the welded part can be eliminated, the surface of the hardware is not smooth, which increases the processing time for the surface of the hardware and also increases the initial cost of formwork, etc.

[0006] Therefore, the present invention has been made in view of these problems, and aims to provide a shear support fitting and a structure using the same shear support fitting, which eliminates the need for wood processing to avoid interference between the welded portion and the recess for fitting the metal fitting provided in the wood, even when joined by welding. [Means for solving the problem]

[0007] To solve the aforementioned problems, the shear support fitting according to the present invention is An inner cylindrical portion having an inner diameter through which the shaft portion of the bolt passes, and the Bolt shaft and the inner cylindrical portion The device comprises a circular plate having bolt holes for passing through it, and a cylindrical outer cylinder portion having a predetermined height in the thickness direction of the circular plate on the outer circumference of the circular plate, wherein the circular plate is joined to the outer cylinder portion by welding only on one side of the circular plate at a position set back inward from at least one end of the outer cylinder portion in the thickness direction of the circular plate. The inner cylindrical portion is fitted into the bolt hole of the circular plate and joined to the circular plate by welding on the same side as the welding between the circular plate and the outer cylindrical portion. It is characterized by the following: Furthermore, in the shear support hardware according to the present invention, The end of the circular plate in the thickness direction on the side of the inner cylindrical portion that is welded to the circular plate protrudes to the same height as the end of the outer cylindrical portion. This is also one of its characteristics. Furthermore, the shear support fitting according to the present invention is characterized in that the circular plate is provided with a linear fixing member hole through which the shaft portion of the linear fixing member passes, and one side of the circular plate that is joined to the outer cylindrical portion by welding is set back inward from the welded end of the outer cylindrical portion by at least the height of the head of the linear fixing member. Furthermore, the shear support hardware according to the present invention The device comprises a circular plate having a bolt hole through which the shaft of a bolt passes, and a cylindrical outer cylinder having a predetermined height in the thickness direction of the circular plate on the outer circumference of the circular plate, wherein the circular plate is joined to the outer cylinder by welding only on one side of the circular plate at a position set back inward from at least one end of the outer cylinder in the thickness direction of the circular plate.The boundary between the circular plate and the outer cylindrical portion is provided with a plurality of through-holes for insertion that penetrate the circular plate at predetermined intervals, and the circular plate is joined to the outer cylindrical portion by the remaining protrusions of the circular plate sandwiched between the through-holes for insertion. Furthermore, the shear support hardware according to the present invention is also characterized in that a linear fixing member hole is provided at a position offset from the center line passing through the in-plane center of the remaining protrusion of the circular plate and the center of the bolt hole, through which the shaft portion of the linear fixing member passes. Furthermore, the structure according to the present invention is characterized by using a shear support fitting as described in any of the above. [Effects of the Invention]

[0008] The shear support fitting according to the present invention comprises a circular plate having a bolt hole through which the shaft of a bolt passes, and a cylindrical outer cylinder portion having a predetermined height in the thickness direction of the circular plate on the outer circumference of the circular plate, wherein the circular plate is joined to the outer cylinder portion by welding only on one side of the circular plate at a position set back inward from at least one end of the outer cylinder portion in the thickness direction of the circular plate. Therefore, when fitting this shear support into the recess for fitting the metal fitting, by applying the side where the welded portion is not visible to the recess for fitting the metal fitting, it becomes unnecessary to process the wood to avoid interference with the welded portion in the recess for fitting the metal fitting, thereby improving work efficiency. [Brief explanation of the drawing]

[0009] [Figure 1] (a) and (b) are perspective views of the shear support fitting according to an embodiment of the present invention, viewed from the welded side and from the non-welded side, respectively. [Figure 2] This is a front view of a shear support fitting according to an embodiment of the present invention. [Figure 3] (a) and (b) are a plan view and a rear view of a shear support fitting according to an embodiment of the present invention, respectively. [Figure 4](a) to (c) are cross-sectional views along line AA, line BB, and line CC in Figure 2, respectively (note that only the end faces of the respective cutting lines of the welded joints are shown). [Figure 5] (a) and (b) are a perspective view and a partially cutaway plan view, respectively, showing an example of the use of the shear support hardware according to the present invention in a wooden building. [Figure 6] (a) and (b) are front and partially cutaway plan views, respectively, showing the state of shear failure of wood in a comparative example where the through-hole for embedding the circular plate is omitted in Example 1 shown in Figure 5. [Figure 7] (a) and (b) are a front view and a partially cutaway plan view, respectively, showing the state of shear failure of wood when a shear force is applied to the shear support of the embodiment in Example 1 shown in Figure 5, and the shear support sinks into the wood to which it is fixed with screws. [Figure 8] (a) to (c) are partial cutaway plan views showing two examples of the use of the shear support hardware according to the present invention in a wooden building, a diagram showing the position of the screw holes of the upper shear support hardware in Figure 8(a), and a diagram showing the position of the screw holes of the lower shear support hardware in Figure 8(a), respectively. [Figure 9] (a) and (b) are a partially cutaway plan view and a front view, respectively, showing Example 3 of the use of the shear support hardware according to the embodiment of the present invention in a wooden building. [Figure 10] This is a partially cutaway front view showing example 4 of the use of the shear support hardware according to the present invention in a wooden building. [Figure 11] This is a partially cutaway plan view showing Example 5 of the use of the shear support hardware according to the embodiment of the present invention in a wooden building. [Modes for carrying out the invention]

[0010] The following describes in detail, with reference to the attached drawings, the shear support hardware 1 according to the embodiment of the present invention and five examples of its use in wooden buildings. It should be noted that the embodiments described below, including their dimensions, are merely examples of the present invention, and the present invention is not limited to these embodiments, but can be modified as appropriate within the scope of the technical concept of the present invention.

[0011] <Configuration of the Shearing Receiver 1 of the Embodiment> As shown in FIGS. 1(a) and 1(b), etc., the shearing receiver 1 of the embodiment is composed of a circular plate 11, a cylindrical outer cylinder part 12 having a predetermined length L1 (see FIG. 4(a)) in the thickness direction of the circular plate 11 outside the circular plate 11, and a cylindrical inner cylinder part 13 having a predetermined length L2 (see FIG. 4(a)) in the thickness direction of the circular plate 11 at the central part of the circular plate 11, which are joined by welding as described later.

[0012] Here, reference numeral 14 is the welding part between the circular plate 11 and the outer cylinder part 12, and reference numeral 15 is the welding part between the circular plate 11 and the inner cylinder part 13. As is clear from comparing FIGS. 1(a) and 1(b), in the shearing receiver 1 of the embodiment, welding is performed only on one surface of the circular plate 11 (hereinafter referred to as the welding surface 11e) as shown in FIG. 1(a), and the welding parts 14 and 15 appear, while welding is not performed on the opposite surface (hereinafter referred to as the non-welding surface 11f) as shown in FIG. 1(b), and the welding parts 14 and 15 do not appear.

[0013] (Circular Plate 11) As shown in FIGS. 1 to 4, the circular plate 11 is formed by cutting a steel plate with a predetermined thickness into a circular shape. The circular plate 11 is provided with a bolt hole 11a through which the shaft part 2b of the bolt 2 passes, and a screw hole 11b as a linear fixing member hole through which the shaft part 3b of the screw 3, which is a linear fixing member, passes.

[0014] In the circular plate 11, as shown in FIGS. 4(a) to 4(c), the inner cylinder part 13 is fitted into the bolt hole 11a and welded on the welding surface 11e side. In this embodiment, since the inner diameter R1 of the inner cylinder part 13 is configured to be approximately the same as the outer diameter of the shaft part 2b of the bolt 2 so that the shaft part 2b of the bolt 2 can pass through, the inner diameter R2 of the bolt hole 11a is configured such that the relationship R2 = R1 + 2·T1 holds, where T1 is the thickness of the inner cylinder part 13 and the numerical value obtained by adding twice the thickness T1 of the inner cylinder part 13 to the inner diameter R1 of the inner cylinder part 13.

[0015] The outer surface of the circular plate 11, that is, the boundary between the circular plate 11 and the outer cylindrical portion 12, has multiple (for example, four here, but of course there can be more than four) through-holes 11c for embedding into the wood 5, which are provided at 90-degree intervals. The remaining protrusion 11d of the circular plate, which is sandwiched on both sides by the through-holes 11c for embedding, and the outer cylindrical portion 12 are joined by welding as described later.

[0016] An inner cylindrical portion 13 is welded to the inner circumferential surface of the bolt hole 11a in the circular plate 11, protruding in the thickness direction of the circular plate 11 to the same height as the end of the outer cylindrical portion 12.

[0017] The four screw holes 11b of the circular plate 11 are positioned offset from the center line CL, which passes through the in-plane center of each of the four remaining protrusions 11d of the circular plate and the center of the bolt hole 11a, as shown in Figures 2 and 3(b), etc. That is, they are positioned offset to either the left or right side of the center line CL. On the welded surface 11e side of the circular plate 11, as shown in Figure 2, the four screw holes 11b are located counterclockwise with respect to the center line CL, while on the non-welded surface 11f side of the circular plate 11, as shown in Figure 3(b), the four screw holes 11b are located clockwise with respect to the center line CL.

[0018] This is because, as shown in Figures 8 to 10 described later, when two shear support brackets 1 of the embodiment are used facing each other, the two shear support brackets 1 are installed with their front and back orientations reversed, so that the positions of the screw holes 11b in the circular plates 11 of the two opposing shear support brackets 1 can be shifted. As a result, even when the non-welded sides 11f of the two shear support brackets 1 are installed facing each other and the shafts 3b of the screws 3 are passed through the screw holes 11b of the circular plates 11, it is possible to prevent the screws 3 from colliding with each other or interfering with each other, and the shear force can be reliably transmitted to the shear support brackets 1 via the screws 3.

[0019] (Outer cylinder part 12) The outer cylindrical portion 12 is attached to the outer circumference of the circular plate 11 by welding, as will be described later, and is a member that mainly receives the shear force acting between the two members. As shown in Figure 4(a), it is made of a cylindrical steel pipe having a predetermined length L1 in the thickness direction of the circular plate 11.

[0020] (Inner cylinder part 13) The inner cylindrical portion 13 is welded to the inner circumferential surface of the bolt holes 11a of the circular plate 11 as described later, and protrudes in the thickness direction of the circular plate 11 to the same height as the end of the outer cylindrical portion 12. As shown in Figure 4(a), it is made of a cylindrical steel pipe having a predetermined length L2 in the thickness direction of the circular plate 11.

[0021] As described above, in this embodiment, the inner diameter R1 of the inner cylindrical portion 13 is made approximately the same as the outer diameter of the shaft portion 2b of the bolt 2, so that the shaft portion 2b of the bolt 2 passes through with almost no gap, and the shear force acting on the bolt 2 is received by this inner cylindrical portion 13.

[0022] (Welding of the circular plate 11, the outer cylindrical portion 12, and the inner cylindrical portion 13) In the shear support fitting 1 of this embodiment, the circular plate 11, the outer cylindrical portion 12, and the inner cylindrical portion 13 are separate components joined by welding. As shown in Figures 1 to 4, welding is performed only on the welding surface 11e side of the circular plate 11, where the outer cylindrical portion 12 and the inner cylindrical portion 13 are welded, and no welding is performed on the non-welded surface 11f on the back (opposite) side of the welding surface 11e.

[0023] This is because, as shown in Figure 5 and other later, the shear support fitting 1 of this embodiment is used by fitting it into a metal fitting recess 5a1 provided in the wood 5, etc., but the surface of the metal fitting recess 5a1 etc that contacts the surface of the wood 5 in this shear support fitting 1 is the non-welded surface 11f opposite to the welded surface 11e where the head 3a of the screw 3 is located on the circular plate 11, and the welded parts 14 and 15 do not appear on the non-welded surface 11f, so processing of the wood 5 to avoid interference with the welded parts 14 and 15 in the metal fitting recess 5a1 is unnecessary, and work efficiency can be improved.

[0024] Furthermore, the shear support fitting 1 of this embodiment is a fitting used to join two members and receives the shear force acting between the two members. In order to improve the shear strength by having the left ends of the outer cylindrical portion 12 and the inner cylindrical portion 13 abut against the side surface of a member separate from the member in which the shear support fitting 1 is embedded, as shown in Figure 4(a), the left ends of the outer cylindrical portion 12 and the inner cylindrical portion 13 are welded so that they are flush with the surface.

[0025] Furthermore, in Figure 4(a), the recess L3 from the left end of the outer cylindrical portion 12 and the inner cylindrical portion 13 to the left side of the circular plate 11 is set to be greater than or equal to the height of the screw head 3a, in order to fix the shear support fitting 1 to the member with a screw 3.

[0026] <Example 1 of the use of shear support hardware 1 in a wooden building> Figures 5(a) and 5(b) are a perspective view and a partially cutaway plan view, respectively, showing an example of the use of an embodiment of the shear support hardware according to the present invention in a wooden building.

[0027] As shown in Figures 5(a) and (b), in Example 1 of use, when joining a wooden member 5 such as a horizontal member to a steel plate 6 using the shear support fitting 1 of the embodiment of the present invention, the shear support fitting 1 of the embodiment is fitted into the metal fitting recess 5a1 provided on the wooden member 5, and the shear support fitting 1 is fixed to the metal fitting recess 5a1 of the wooden member 5 by passing the shaft portion 3b of the screw 3 through each of the four screw holes 11b provided on the circular plate 11. It is assumed that the wooden member 5 has been pre-processed not only with the metal fitting recess 5a1 but also with through holes (not shown) for the shaft portion 2b of the bolt 2. Also, in Figure 5, the reference numeral 2a is the head of the bolt 2.

[0028] Next, in order to join the wood 5 to which the shear support fitting 1 of this embodiment is fixed to the steel plate 6, the side surface 5a of the wood 5 to which the shear support fitting 1 is fixed and the steel plate 6 are butted together, the through hole for the bolt shaft portion of the wood 5 (not shown) and the through hole for the bolt shaft portion of the steel plate 6 (not shown) are aligned, the shaft portion 2b of the bolt 2 is passed through from the steel plate 6 side, and a nut 4a is fastened to the tip of the shaft portion 2b of the bolt 2 protruding from the wood 5 side via a washer 4b to join the wood 5 and the steel plate 6. This completes Example 1 of use, which is the joining of wood 5 and steel plate 6 using the shear support fitting 1 of this embodiment.

[0029] In this case, the circular plate 11 of the shear support fitting 1 and the outer cylindrical portion 12 and inner cylindrical portion 13 are joined by welding. However, as shown in Figure 4(a), the recess amount L3 from the left end of the outer cylindrical portion 12 and inner cylindrical portion 13 to the left side of the circular plate 11 is greater than or equal to the height of the screw head 3a. Since the outer cylindrical portion 12 is joined by welding only on the welding surface 11e side where the screw head 3a is located, the welded parts 14 and 15 do not appear on the non-welded surface 11f side of the circular plate 11.

[0030] Therefore, by bringing the non-welded surface 11f, where the welded parts 14 and 15 do not appear, into contact with the metal fitting recess 5a1, it becomes unnecessary to process the wood 5 to avoid interference with the metal fitting recess 5a1 on the wood 5 side, thereby improving work efficiency.

[0031] Furthermore, in the shear support fitting 1 of this embodiment, the circular plate 11 is set back (offset) inward by a length L3 greater than or equal to the height of the screw head 3a, and is welded only on one side of the welding surface 11e to the inner circumferential surface of the outer cylindrical portion 12 and the outer circumferential surface of the inner cylindrical portion 13. Therefore, even when the shear support fitting 1 is fixed to the metal fitting recess 5a1 of the wood 5 with the screw 3, and then the steel plate 6 is placed on top of the metal fixing side surface 5a of the wood 5, the screw head 3a does not interfere with the steel plate 6, allowing the wood 5 and the steel plate 6 to be joined together.

[0032] In particular, since the circular plate 11 is welded not to the end of the outer cylindrical portion 12, but set back (offset) by a length L3 (see Figure 4(a)), the effect of suppressing the bending deformation of the outer cylindrical portion 12 is improved, and the thickness of the outer cylindrical portion 12 can be reduced. As a result, the shear support fitting 1 of the embodiment can be made lighter, which improves work efficiency and reduces costs.

[0033] <Comparison of the operation of the shear support hardware 1 of this embodiment in Example 1 with a comparative example in which the through-hole for embedding the circular plate is omitted> Next, the operation of the shear support fitting 1 of this embodiment in Example 1 will be explained in comparison with the operation of a comparative example in which the through-hole 11c for embedding in the circular plate 11 is omitted.

[0034] Figures 6(a) and 6(b) are a front view and a partially cutaway plan view, respectively, showing the state of shear failure of the wood 5 in the shear support hardware 1' of a comparative example in which the through-hole 11c for embedding the circular plate 11 is omitted, as shown in Example 1 of Use 4. Note that the steel plate 6 is not shown in the front view of Figure 6(a).

[0035] As shown in Figures 6(a) and (b), when an excessive shear force is applied to the wood 5 and steel plate 6 joined using the comparative example shear support fitting 1', the comparative example shear support fitting 1' omits the four through holes 11c for embedding in the circular plate 11', so it hardly embeds into the wood 5, and the shaft portion 2b of the bolt 2 and the steel plate 6 do not deform out of plane.

[0036] Therefore, in the comparative example, the shear support fitting 1' hardly penetrates the wood 5. As a result, when a shear force acts on the wood 5 in the longitudinal direction of the wood 5 or the steel plate 6, the shear force is mainly received by the outer cylindrical portion 12' of the shear support fitting 1'. Consequently, the shear effective area ESA (see Figure 6(b)) of the shear support fitting 1' remains small, and shear failure SH (see Figure 6(a)) occurs in the wood 5.

[0037] Figures 7(a) and 7(b) are a front view and a partially cutaway plan view, respectively, showing the state of shear failure of the wood 5 by the shear support hardware 1 of the embodiment used in Example 1 shown in Figure 5. Note that the steel plate 6 is not shown in the front view of Figure 7(a).

[0038] In the shear support fitting 1 of this embodiment, as shown in Figure 7(a), etc., four through-holes 11c for embedding are provided in the circular plate 11. Therefore, if an excessive shear force is applied between the wood 5 and the steel plate 6 in the direction of the arrow (see Figure 7(b)), shear failure SH occurs as shown in Figure 7(a). However, as shown in Figure 7(b), when the shear support fitting 1 of this embodiment bends out of plane and embeds itself in the wood 5, the shaft portion 2b of the bolt 2 fastening the shear support fitting 1 and the steel plate 6 also deform out of plane.

[0039] As a result, the shear support fitting 1 embedded in the wood 5 and the bent steel plate 6 also become inclined with respect to the longitudinal direction of the wood 5 and steel plate 6. Therefore, the shear force acting on the wood 5 and steel plate 6 is decomposed not only in the longitudinal direction of the wood 5 and steel plate 6, but also in the longitudinal direction of the shaft portion 2b of the bolt 2, and transmitted to the wood 5.

[0040] As a result, in the shear support fitting 1 of the embodiment, since the circular plate 11 is provided with four through-holes 11c for embedding, when a shear force acts between the wood 5 and the steel plate 6, the shear support fitting 1 embeds into the wood 5 through the through-holes 11c. The shear force in the longitudinal direction of the wood 5 and steel plate 6 is received by the outer cylindrical portion 12 and the inner cylindrical portion 13, while the shear force decomposed in the longitudinal direction of the shaft portion 2b of the bolt 2 can be received by the circular plate 11. As a result, the effective shear area ESA (see Figure 7(b)) of the shear support fitting 1 becomes larger by the amount of the embedded circular plate 11, so that the shear failure SH (see Figure 7(a)) of the wood 5 can be reduced compared to the case of the shear support fitting 1' of Comparative Example 1.

[0041] Furthermore, as shown in Figure 7(a), if at least one pair of opposing circular plate protrusions 11d, 11d are positioned so that they face in the direction of the arrow shown in Figure 7(b), that is, parallel to the longitudinal direction of the wood 5, then that pair of circular plate protrusions 11d, 11d will effectively act against the shear force acting on the wood 5 and the steel plate 6, making it effective. In this case, the other pair of opposing circular plate protrusions 11d, 11d will face parallel to the short direction of the wood 5. In this case, in order to position at least one pair of opposing circular plate protrusions 11d, 11d in an orientation effective against shear force, the shear support fitting 1 is fixed to the fitting recess 5a1 by passing screws 3 through each of the four screw holes 11b provided in the circular plate 11. This ensures that the shear support fitting 1 does not rotate and can be fixed not only during on-site transport after temporary fixing to the member, but also when installing using tools.

[0042] <Example 2 of the use of shear support hardware 1 in an embodiment of a wooden building> Figures 8(a) to 8(c) are explanatory diagrams showing, respectively, a partially cutaway plan view of Example 2 of use in a wooden building using two shear support brackets 1 according to the embodiment of the present invention, the position of the screw holes of the upper shear support bracket 1 in Figure 8(a), and the position of the screw holes of the lower shear support bracket 1 in Figure 8(a).

[0043] In the second example of use shown in Figure 8(a), fitting recesses 5a1 for metal fittings are provided on both the left and right sides of the wood 5. The shear support fittings 1 of this embodiment are fitted into the fitting recesses 5a1 on both the left and right sides so that the non-welded surfaces 11f face each other. For each shear support fitting 1, screws 3 are passed through the four screw holes 11b provided in the circular plate 11, as in the first example of use, to fix the shear support fitting 1 to the fitting recesses 5a1 on both the left and right sides.

[0044] In this case, the non-welded surface 11f (see Figure 3(b)) of the upper shear support fitting 1 in Figure 8(a) faces the lower shear support fitting 1 in Figure 8(a). As a result, the screw holes 11b of the circular plate 11 are positioned clockwise from the center line CL, which passes through the in-plane center of each remaining protrusion 11d of the circular plate and the center of the bolt hole 11a, as shown in Figures 3(b) and 8(b). Consequently, the screws 3 are also driven in at a position clockwise from the center line CL.

[0045] In contrast, the lower shear support fitting 1 in Figure 8(a) is fixed to the fitting recess 5a1 by flipping it over relative to the upper shear support fitting 1. As a result, the screw holes 11b in the circular plate 11 are positioned counterclockwise from the center line CL, which passes through the in-plane center of each remaining protrusion 11d of the circular plate and the center of the bolt hole 11a, as shown in Figures 2 and 8(c). The screws 3 are also driven in at a position counterclockwise from the center line CL.

[0046] Therefore, in this example of use 2, the screws 3 that fix the shear support fittings 1 provided on both the top and bottom sides of the wood 5 are driven in at positions shifted clockwise from the center line CL, as shown in Figure 3(b) and Figure 8(b), and at positions shifted counterclockwise, as shown in Figure 2 and Figure 8(c), so as to prevent interference, when using the wood 5 sandwiched between two shear support fittings 1 on both sides, as in example of use 2, it is possible to securely fix the screws 3 without interference.

[0047] Subsequently, on both the left and right sides of the wood 5, the through-holes for the bolt shafts (not shown) in the wood 5 and the through-holes for the bolt shafts (not shown) in the steel plate 6 are aligned, as in Example 1. The shaft portion 2b of the bolt 2 is passed through one of the steel plate 6, and a nut 4a is fastened to the tip of the shaft portion 2b of the bolt 2 protruding from the other steel plate 6, thereby joining the wood 5, with the shear support fittings 1 fixed to both sides, sandwiched between the two steel plate 6. This completes Example 2, which involves joining wood 5 and steel plate 6 using two shear support fittings 1 of this embodiment.

[0048] <Example 3 of the use of shear support hardware 1 in a wooden building embodiment> Figures 9(a) and 9(b) are explanatory diagrams showing an example of using the shear support hardware 1 according to an embodiment of the present invention in a wooden building, in which two shear support hardware pieces 1 are used to sandwich the structure, similar to the case shown in Figure 8.

[0049] In the example of use shown in Figures 9(a) and 9(b), metal fitting recesses 5a1", 5a1", are provided on both the left and right sides of the beam 5'' which is placed on top of the column 5''. The shear support fittings 1 of the embodiment are fitted into each of the metal fitting recesses 5a1", 5a1", and screws 3 are passed through each of the four screw holes 11b provided in the circular plate 11 to fix the shear support fittings 1 to the metal fitting recesses 5a1", 5a1", of the beam 5''. Instead of the steel plate 6, the brace end fittings 6b' at both ends of the brace material body 6a' of the steel brace 6'' are applied and fastened with double-ended bolts (fully threaded bolts) 2'' and two nuts 4a. This is an example of using the shear support fittings 1 to provide a steel brace 6'' to the structural frame composed of the column 5'' and the beam 5''. Note that the screws 3 are not shown in Figure 9.

[0050] Furthermore, in the case of Example 3 shown in Figures 9(a) and 9(b), since the shear support fittings 1 of the embodiment are provided on both the left and right sides of the beam 5", just as in the case of Example 2 described above, the screws 3 on both the left and right shear support fittings 1 can be securely fixed to the beam 5" without interfering with each other.

[0051] <Example 4 of the use of shear support hardware 1 in a wooden building embodiment> Figure 10 is an explanatory diagram showing an example of the use of the shear support hardware 1 according to the present invention in a wooden building, as shown in Figure 10.

[0052] Example 4 shown in Figure 10 is an example in which the shear support fitting 1 of the embodiment is used as a substitute for the mortise joint of the diagonal member 5''' when joining the diagonal member 5''' to the column 5'. Note that the screw 3 is not shown in Figure 10.

[0053] Specifically, recesses 5a1' and 5a1"' for fitting metal fittings are provided on the joint surfaces of the column 5' and the diagonal member 5"', respectively, and bolt holes are provided that penetrate between the column 5' and the diagonal member 5"' via the respective recesses 5a1' and 5a1"' for fitting metal fittings. Furthermore, on the side of the diagonal member 5"', a recess 5a2"' for storing nuts, etc., which accommodates nuts 4a and washers 4b, is provided on the opposite side of the recess 5a1"' for fitting metal fittings.

[0054] Then, as shown in Figure 10, the shear support fittings 1 of the embodiment are fixed with screws 3 to the fitting recesses 5a1', 5a1''' of the column 5' and the diagonal member 5''' respectively, and double-ended bolts 2' are passed through bolt holes that penetrate between the column 5' and the diagonal member 5''', and nuts 4a are fastened to both ends of the double-ended bolts 2' that protrude from the outside of the column 5' and from the nut storage recess 5a2''' of the diagonal member 5''' via washers 4b, thereby joining the column 5' and the diagonal member 5''', and a mortise and tenon joint is used as a substitute for the two shear support fittings 1.

[0055] <Example 5 of the use of shear support hardware 1 in an embodiment of a wooden building> Figure 11 is an explanatory diagram showing an example 5 of the use of the shear support hardware 1 according to the present invention in a wooden building. In Example 5 shown in Figure 11, the shear support hardware 1 of the embodiment is used when joining two pieces of wood 5 together with a joint. Note that the screw 3 is not shown in Figure 11.

[0056] Specifically, a recess 5a1 for fitting metal fittings is provided at the joint of each of the two pieces of wood 5, and a bolt hole is provided that passes through the recess 5a1 for fitting metal fittings between the two pieces of wood 5 to be joined. The shear support fitting 1 of the embodiment is fixed to the recess 5a1 of each of the two pieces of wood 5 to be joined with screws 3, and a double-ended bolt 2' is passed through the bolt hole that passes through the two pieces of wood 5 to be joined. The ends of the double-ended bolt 2' protruding from each of the pieces of wood 5 to be joined are fastened with nuts 4a via washers 4b to join the pieces of wood 5 to be joined, and the joint is made by the shear support fitting 1 of the embodiment.

[0057] <Summary of the shear support hardware 1 in the embodiment> As described above, the shear support fitting 1 of the embodiment of the present invention comprises a circular plate 11 through which bolt holes 11a for passing the shafts 2b, 2b' of bolts 2, 2', and a cylindrical outer cylindrical portion 12 having a predetermined height in the thickness direction of the circular plate 11 on the outer circumference of the circular plate 11. The circular plate 11 is joined to the outer cylindrical portion 12 by welding only at the welding surface 11e, which is one side surface of the circular plate 11, at a position set back inward from at least one end of the circular plate 11 in the thickness direction of the outer cylindrical portion 12.

[0058] Therefore, since no welded portion 14, etc., appears on the non-welded surface 11f opposite to the welded surface 11e, when fitting the shear support fitting 1 of the embodiment into the fitting recesses 5a1, 5a1', 5a1”, by applying the non-welded surface 11f, where no welded portion 14, etc., appears, to the fitting recesses 5a1, 5a1', 5a1”, it is possible to eliminate the need for wood processing to avoid interference between the fitting recesses 5a1, 5a1', 5a1" and the welded portion 14, etc., thereby improving work efficiency.

[0059] Furthermore, since the circular plate 11 is welded not to the end of the outer cylindrical portion 12, but set back (offset) by a length L3 from the end, the effect of suppressing the bending deformation of the outer cylindrical portion 12 is improved, and the plate thickness of the outer cylindrical portion 12 can be reduced, making the shear support fitting 1 of the embodiment lighter. This improves work efficiency and reduces costs.

[0060] Furthermore, in the shear support fitting 1 of the embodiment of the present invention, the inner circumference of the bolt hole 11a in the circular plate 11 has an inner diameter R1 that is approximately the same as the outer diameter of the shaft portion 2b, so as to allow the shaft portion 2b of the bolt 2 to pass through, and the inner cylindrical portion 13 that protrudes in the thickness direction of the circular plate 11 to the same height as the end of the outer cylindrical portion 12 is joined by welding on the same welding surface 11e side as the welding between the circular plate 11 and the outer cylindrical portion 12.

[0061] Therefore, when the shear support fitting 1 of this embodiment is used to join multiple members, not only the end of the outer cylindrical portion 12 but also the end of the inner cylindrical portion 13 abuts against other members, and the inner cylindrical portion 13 receives pressure from the other members. This suppresses bending deformation of the bolt 2 and ensures sufficient bearing capacity even if the circular plate 11 is thin.

[0062] In particular, the inner diameter R1 of the inner cylinder portion 13 (see Figure 4(a)) is approximately the same as the shaft diameter or outer diameter (nominal diameter) of the shaft portion 2b of the bolt 2. Therefore, when the shaft portion 2b of the bolt 2 attempts to deform due to shear force, not only does the outer cylinder portion 12 resist, but the shaft portion 2b of the bolt 2 also resists by contacting the inner circumferential surface of the inner cylinder portion 13, thus improving the resistance to shear force.

[0063] Furthermore, in the shear support fitting 1 of the embodiment of the present invention, the circular plate 11 is provided with a screw hole 11b through which the shaft portion 3b of the screw 3 passes, and one side of the circular plate 11 that is joined to the outer cylindrical portion 12 or the inner cylindrical portion 13 by welding (welded surface 11e) is offset inward by a length L3 from the end on the welded portion 14, 15 side of the outer cylindrical portion 12 by at least the height of the head 3a of the screw 3.

[0064] Therefore, by providing screw holes 11b in the circular plate 11, it can be fixed to the metal fitting recesses 5a1, 5a1', 5a1”, provided in the wood 5, etc., by screws 3 passed through the screw holes 11b. This prevents a decrease in shear rigidity even if there is a gap or other clearance between the shear support fitting 1 and the metal fitting recesses 5a1, 5a1', 5a1”. In addition, even if there is a gap or other clearance in the metal fitting recesses 5a1, 5a1', 5a1”, the shear support fitting 1 can be temporarily fixed with screws 3 after processing the metal fitting recesses 5a1, 5a1', 5a1”, allowing the shear support fitting 1 to be transported to the site without coming off.

[0065] Furthermore, in the shear support fitting 1 of the embodiment of the present invention, a plurality of through-holes 11c for embedding are provided at predetermined intervals at the boundary between the circular plate 11 and the outer cylindrical portion 12, and the circular plate 11 is joined to the outer cylindrical portion 12 by the remaining protrusions 11d of the circular plate sandwiched between the through-holes 11c for embedding.

[0066] Therefore, when an excessive shear force acts on the shearing hardware 1 of the embodiment, and an out-of-plane stress acts on the circular plate 11, if one of the members is wood 5, the wood 5 that was facing the through-hole 11c will be driven into the through-hole 11c, allowing not only the outer cylindrical portion 12 but also the circular plate 11 to receive and resist the shear force, thereby increasing the resistance to shear force.

[0067] Furthermore, in the shear support fitting 1 of the embodiment of the present invention, the four screw holes 11b are each provided at positions offset from the center line CL that passes through the in-plane center of each of the four remaining protrusions 11d of the circular plate and the center of the bolt hole 11a.

[0068] Therefore, for example, when using two shear support brackets 1 of the embodiment, as shown in Figures 8 and 9, to sandwich the left and right sides of the wood 5, the positions of the screw holes 11b in the circular plates 11 of the two opposing shear support brackets 1 are offset, and the positions of the screws 3 passed through each screw hole 11b are also offset. This prevents the screws 3 from colliding with each other or interfering with each other, thus ensuring that the shear force is reliably transmitted to the shear support bracket 1 via the screws 3.

[0069] In the above description of the embodiment, a screw 3 was used as an example of a linear fixing member, but the present invention is not limited to this, and the linear fixing member can be any linear fixing member other than a screw, such as a screw, nail, or lag screw bolt, as long as it has a head and a shaft.

[0070] Furthermore, in the description of the embodiments above, examples 1 to 5 of the use of the shear support hardware 1 of the embodiment of the present invention were described in wooden buildings. However, the present invention is not limited to wooden buildings as an example of use of the shear support hardware, but can also be used in mixed buildings that use wood and other structural materials such as steel or concrete, and even in structures other than these buildings, and is applicable to structures other than those described above. [Explanation of Symbols]

[0071] 1. Shear support hardware 11 circular plate 11a Bolt hole 11b Screw hole (linear fixing member hole) 11c Through hole for embedding 11d Remaining protrusions on circular plate 11e Welding Mask 11f Non-welded surface 12 Outer cylinder part 13 Inner cylinder part 14,15 Welded section 2 bolts 2a head 2b Shaft 2' Double-ended bolt 3. Screws (linear fixing members) 3a head 3b Shaft 4a Nut 4b Washer 5 wood 5a Metal Fixing Side 5a1 Recess for fitting metal fittings 5' pillar 5a1' Recess for fitting metal fittings 5” beam 5a1” Recess for fitting metal fittings 5”’ diagonal 5a1”' Recess for fitting metal fittings 6 Steel plate 6' Steel Brace 6a' Brace material body 6b' Brace end fittings

Claims

1. An inner cylindrical portion having an inner diameter through which the shaft portion of the bolt passes, A circular plate having a bolt hole through which the shaft portion of the bolt and the inner cylindrical portion pass, The circular plate is provided with a cylindrical outer portion having a predetermined height in the thickness direction of the circular plate on its outer circumference. The circular plate is joined to the outer cylindrical portion by welding only on one side of the circular plate, at a position set back inward from at least one end of the circular plate in the thickness direction within the outer cylindrical portion. The shear support fitting is characterized in that the inner cylindrical portion is fitted into the bolt hole of the circular plate and joined by welding on the same side of the circular plate as the welding between the circular plate and the outer cylindrical portion.

2. In the shear support fitting according to claim 1, A shearing support fitting characterized in that the end of the circular plate in the thickness direction on the side of the inner cylindrical portion that is welded to the circular plate protrudes to the same height as the end of the outer cylindrical portion.

3. In the shear support fitting according to claim 1, The circular plate is provided with a linear fixing member hole through which the shaft portion of the linear fixing member passes. The shearing support hardware is characterized in that one side of the circular plate, which is joined to the outer cylindrical portion by welding, is set back inward from the welded end of the outer cylindrical portion by at least the height of the head of the linear fixing member.

4. A circular plate having a bolt hole through which the shaft portion of a bolt passes, The circular plate is provided with a cylindrical outer portion having a predetermined height in the thickness direction of the circular plate on its outer circumference. The circular plate is joined to the outer cylindrical portion by welding only on one side of the circular plate, at a position set back inward from at least one end of the circular plate in the thickness direction within the outer cylindrical portion. The shearing support hardware is characterized in that a plurality of through-holes for insertion are provided at predetermined intervals at the boundary between the circular plate and the outer cylindrical portion, and the circular plate is joined to the outer cylindrical portion by the remaining protrusions of the circular plate sandwiched between the through-holes for insertion.

5. In the shear support fitting described in claim 4, A shear support fitting characterized in that a linear fixing member hole is provided at a position offset from the center line passing through the in-plane center of the remaining protrusion of the circular plate and the center of the bolt hole, through which the shaft portion of the linear fixing member passes.

6. The use of a shear support fitting described in any one of claims 1 to 5 is a feature of the invention. A distinctive structure.

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