JP2021134615A - Joint metal for construction - Google Patents

Abstract

To provide a washer position fixing portion for fixing the washer position without deteriorating the strength of the substrate.SOLUTION: There is provided a joint metal for construction in which a pair of side plates 12 and 12 facing each other with an operating gap of a nut 5 screwed into an anchor bolt 4 are erected on a substrate 11 provided with a bolt insertion hole 11a for inserting the anchor bolt 4 protruding from a foundation concrete 2, a receiving plate 13 for placing and fixing the structural material is provided on the side plates 12 and 12, and the tip of the anchor bolt 4 through which the bolt insertion hole 11a is inserted is fastened with the nut 5 via a first washer 6. The lower ends of the pair of side plates 12 and 12 are provided with washer position fixing portions 12a and 12a extending from each lower end portions toward the center of the substrate 11 and fixing the position of the first washer 6.SELECTED DRAWING: Figure 2

Description

The present invention relates to building joint hardware used for fixing structural materials such as columns and wall panels such as CLT and LVL to foundation concrete.

A pair of side plates are erected on the board via bolt insertion holes of anchor bolts, and a pillar or a structural material such as a wall panel such as CLT or LVL is placed and fixed on the pair of side plates. A board is erected and constructed, and an anchor bolt protruding from the foundation concrete is passed through the bolt insertion hole, and a nut is screwed and tightened to the bolt to fix the substrate to the foundation concrete and place a structural material on the receiving plate. A structure has been proposed in which the bolts are placed and fixed (see, for example, Patent Documents 1 and 2).

Japanese Unexamined Patent Publication No. 2002-167868 Japanese Patent No. 5323622

However, in the above-mentioned building joint metal fitting described in Patent Document 1, since the washer position fixing portion for fixing the washer position is not provided on the substrate, when the building joint metal fitting is fixed to the foundation concrete with anchor bolts, When an external force such as compression, tension, or shear is applied, the position of the washer is not firmly fixed, so that the building joint metal fitting and the washer are easily deformed, which tends to affect the yield strength.

Further, in the building joining metal fitting described in Patent Document 2 described above, although the washer position fixing portion is provided on the substrate, a strong force is required to support the substrate and project it from the upper surface of the substrate, and the washer is required. There is a problem that it is difficult to provide a position fixing portion.

In particular, in the building joining hardware described in Patent Document 2, since the dowel provided by lining the substrate is used as the washer position fixing portion, if the thickness of the substrate is too thick, the substrate may be deformed by the lining or the dowel may be provided. There is also a problem that the strength of the substrate deteriorates if the substrate is made thin in order to ensure that the dowels are provided.

Therefore, the present invention has been made by paying attention to such a problem, and an object of the present invention is to provide a metal joint for construction in which a washer position fixing portion can be provided without deteriorating the strength of the substrate.

In order to solve the above problems, the building washer according to the present invention has an operating gap for a nut screwed into the anchor bolt on a substrate provided with a bolt insertion hole for inserting an anchor bolt protruding from the foundation concrete. A pair of side plates facing each other are erected, a receiving plate for placing and fixing a structural material is provided on the side plates, and the tip of the anchor bolt through which the bolt insertion hole is inserted is inserted by a nut via a washer. An anchor metal for construction configured to be fastened, and a washer position fixing portion extending from each lower end toward the center of the substrate and fixing the position of the washer at the lower end of each of the pair of side plates. Is provided. The structural material in the present invention includes not only columns but also wall panels such as CLT and LVL.
Further, in the building joint metal fitting according to the present invention, the washer position fixing portion is directed toward the center of the substrate by making a notch in the lower end portion of each of the pair of side plates and bending a part of the lower end portion thereof. It is also characterized by being configured to extend.
Further, in the building joint metal fitting according to the present invention, the washer position fixing portion is bent so that a part of each of the pair of side plates is floated from the upper surface of the substrate, and the upper surface of the washer position fixing portion is formed. Is also characterized in that it is flush with or higher than the upper surface of the washer placed on the substrate.
Further, in the building joint metal fitting according to the present invention, each of the washer position fixing portions has a washer fixing curved surface portion curved in the shape of the circumference of the washer, and the washer fixing curved surface portion of the washer It is also characterized by fixing the position.
Further, the building joining metal fitting according to the present invention is also characterized in that the washer is used as the first washer and a second washer having an outer diameter smaller than the outer diameter of the first washer is provided on the first washer. do.

In the building joint metal fitting according to the present invention, the lower end portion of each of the pair of side plates is provided with a washer position fixing portion extending from the lower end portion toward the center of the substrate and fixing the position of the washer. The washer position fixing portion can be provided without deteriorating the strength of the washer.

It is a perspective view of the metal joint for building of the embodiment which concerns on this invention. It is a front view of the building joint metal fitting of embodiment which concerns on this invention. It is a side view of the metal joint for building of the embodiment which concerns on this invention. FIG. 2 is a cross-sectional view taken along the line AA in FIG. FIG. 2 is a cross-sectional view taken along the line AA in FIG. 2 after the first washer is removed. (A) and (b) are a plan view showing a welded portion in the washer position fixing portion after removing the first washer, and a front view of a main part showing the welded portion in the washer position fixing portion, respectively. (A), (b) Side plates (states before bending the lower end portion to form a washer position fixing portion and before bending the steel plate) constituting the building joint metal fitting of the embodiment according to the present invention, respectively. ), And a side view of the side plate showing a state in which the lower end of the side plate cut from the steel plate is bent to form a washer position fixing portion. It is a top view of the 1st washer used in the building joint metal fitting of the embodiment which concerns on this invention. It is a figure which shows the use example of the metal joint for construction of the embodiment which concerns on this invention. It is a figure which shows the feature of the other structural example of the building joint metal fitting which concerns on this invention (the structural example which divided the washer position fixing part into two). It is a figure which shows the feature of another structural example (the structural example which made the side plate flat) which concerns on this invention. It is a figure which shows the feature of the other structural example of the building joint metal fitting which concerns on this invention (the structural example which made the side plate flat and divided the washer position fixing part into two). It is a perspective view of another structural example (a configuration example in which two washers are used) according to the present invention. It is a front view of another structural example (a configuration example in which two washers are used) according to the present invention. It is a top view which shows the 2nd washer newly added in another structural example of the building joint metal fitting which concerns on this invention (the configuration example which made 2 washers). FIG. 14 is a cross-sectional view taken along the line BB in FIG. FIG. 14 is a cross-sectional view taken along the line BB with anchor bolts inserted. It is a figure which shows the use example of another structure example (the structure example which made two washers) of the building joint metal fitting which concerns on this invention.

Hereinafter, the building joining hardware of the embodiment according to the present invention will be described in detail with reference to the drawings. The embodiments described below are merely examples of the present invention, and the present invention is not limited to the embodiments described below.

<Structure of Building Bonding Hardware 1 of the Embodiment>
The building joint metal fitting 1 of the embodiment according to the present invention is, for example, a metal fitting used for erection of a pillar 3 on a foundation concrete 2 as shown in FIG. 9 described later, and is as shown in FIG. A first washer 6 is provided with a substrate 11, a pair of side plates 12, 12 and a receiving plate 13, and receives a nut 5 screwed into an anchor bolt 4 protruding from the upper surface of the foundation concrete 2 on the substrate 11. Is configured to be placed.

(Board 11)
The lower surface side of the substrate 11 is placed on the foundation concrete 2 as shown in FIG. 9, which will be described later, while the lower end portions of the pair of side plates 12 and 12 are joined to the upper surface side by welding or the like, and FIGS. As shown in FIG. 5, the first washer 6 is placed, and as shown in FIGS. 5 and 6 (a) and 6 (b), a bolt insertion hole 11a through which the anchor bolt 4 passes is formed.

The inner diameter α of the bolt insertion hole 11a of the substrate 11 is set, for example, so that the anchor bolt 4 always passes through the bolt insertion hole 11a of the substrate 11 even if the anchor bolt 4 protrudes from the planned protrusion position designed on the upper surface of the foundation concrete 2. , It is formed to be about twice as large as the outer diameter of the anchor bolt 4 and smaller than the outer diameter β (see FIG. 8) of the first washer 6 so that the first washer 6 does not fall from the bolt insertion hole 11a. ..

(Side plates 12, 12)
The side plates 12 and 12 are joined to the substrate 11 by welding or the like at their lower ends so as to face each other with an operating gap of the nut 5 screwed into the anchor bolt 4 on the substrate 11. As shown in 5 and the like, in a plan view, the centers of the side plates 12 and 12 are curved so as to approach the center of the substrate 11, and the lower ends of the side plates 12 and 12 have their respective lower ends. Is bent and extends toward the center of the substrate 11, and is provided with washer position fixing portions 12a and 12a for fixing the position of the first washer 6.

As shown in FIGS. The lower surfaces of the washer position fixing portions 12a and 12a are lifted (separated) by a few mm from the upper surface of the substrate 11 by a few mm so that the lower surfaces of the fixing portions 12a and 12a do not come into contact with the upper surface of the substrate 11, and the upper surfaces of the washer position fixing portions 12a and 12a are separated. It is configured to be flush with or higher than the upper surface of the first washer 6 placed on the substrate 11.

Here, the reason why the upper surfaces of the washer position fixing portions 12a and 12a are flush with or higher than the upper surface of the first washer 6 placed on the substrate 11 is that the anchor bolt 4 is fastened with the nut 5 via the first washer 6. This is because the 1 washer 6 is fixed by the washer position fixing portions 12a and 12a.

The reason why the lower surfaces of the washer position fixing portions 12a and 12a are floated from the upper surface of the substrate 11 is that the thickness of the first washer 6 used in the present embodiment is several mm larger than the thickness of the side plates 12 and 12 by about 2 mm to 6 mm. When the lower surfaces of the washer position fixing portions 12a and 12a are not lifted (separated) from the upper surface of the substrate 11, the upper surfaces of the washer position fixing portions 12a and 12a are flush with the upper surface of the first washer 6 placed on the substrate 11. Because it doesn't happen. Further, when the lower surfaces of the washer position fixing portions 12a and 12a are floated (separated) from the upper surface of the substrate 11, the plating solution can be reliably and easily applied to the side plate 12 when the building bonding metal fitting 1 is plated by dipping or the like. , 12 This is because it spreads over the front side and the back side of the lower end portion.

However, although the lower surfaces of the washer position fixing portions 12a and 12a are floated from the upper surface of the substrate 11, the respective side surface portions 12a2 and 12a2 are welded to the upper surface of the substrate 11 as shown in FIGS. .. In FIGS. 6A and 6B, reference numerals 12a3 indicate welded portions between the side surface portions 12a2 and 12a2 of the washer position fixing portions 12a and 12a and the upper surface of the substrate 11. That is, the washer position fixing portions 12a and 12a are joined to the upper surface of the substrate 11 by the welded portions 12a3 and 12a3 on both side surface portions 12a2 and 12a2, respectively. It is not essential that the welded portion 12a3 is welded until it reaches the upper surfaces of both side surface portions 12a2 and 12a2, and even if the welded portions 12a3 do not reach the upper surfaces of both side surface portions 12a2 and 12a2, the side surface portions 12a2 and 12a2 of the washer position fixing portions 12a and 12a are the substrates 11 It is enough if it can be welded to.

As a result, the strength of the entire building joint metal fitting 1 can be improved as compared with the case where the lower surfaces of the washer position fixing portions 12a and 12a are floated from the upper surface of the substrate 11 and the side surface portions 12a2 and 12a2 are not welded to the upper surface of the substrate 11.

Further, in order to fix the washer position fixing portions 12a and 12a so that the center of the first washer 6 is located at the center of the substrate 11 and is not displaced in the horizontal direction, FIGS. As shown in a), the first washer 6 is provided with curved surface portions 12a1, 12a1 for fixing the washer, which are curved in the shape of the circumference of the first washer 6 in a plan view.

The curved surface portions 12a1 and 12a1 for fixing the washer have notches on both sides of the lower end portions of each of the pair of side plates 12 and 12 as shown in FIG. 7A, and the protruding portions for forming the washer position fixing portion sandwiched between the notches. 12d is longer than the legs 12c and 12c for joining the washer position fixing portions on both sides thereof, and the washer fixing curved surface portion curved in the shape of the circumference of the first washer 6 on the washer position fixing portion forming protrusion 12d. After cutting from the steel plate into the shape provided with 12a1 and 12a1, when the projecting portion 12d for forming the washer position fixing portion is bent 90 degrees toward the center of the substrate 11, as shown in FIG. 7B, the washer position fixing portion 12a, It becomes 12a.

Since the side plates 12 and 12 are curved in a plan view as described above, after cutting the steel plate into the shape shown in FIG. 7A, the entire side plates 12 and 12 are curved, and then a notch is made. The portion sandwiched by the notch may be bent 90 degrees toward the center of the substrate 11 to provide the washer position fixing portions 12a and 12a, or the portion sandwiched by the notch may be bent 90 degrees as shown in FIG. 7B. After providing the washer position fixing portions 12a and 12a, the entire side plates 12 and 12 may be curved.

The contact points between the pair of washer position fixing legs 12c and 12c and the upper surface of the substrate 11 are joined by welding or the like, not shown.

(Receiving plate 13)
The receiving plate 13 is provided by being joined to the upper ends of the side plates 12 and 12 facing the substrate 11 by welding or the like, and the lower end of the pillar 3 is placed as shown in FIG. 9 described later. As shown in FIG. 3 and the like, a through hole 13a for a fixing bracket is provided at the center of the receiving plate 13 to pass a fixing bracket for fixing the receiving plate 13 and the lower end portion of the pillar 3.

Here, in the case of the usage example shown in FIG. 9, since the lower end portion of the column 3 has a lug screw bolt 71 having a male screw portion on the outer peripheral surface of the shaft portion and a female screw portion inside the shaft end portion. , A bolt 72 or the like screwed into the female screw portion of the lug screw bolt 71 serves as a fixing bracket.

As described above, the contact points between the lower surface of the receiving plate 13 and the upper ends of the pair of side plates 12 and 12 are joined by welding or the like, but the illustration is omitted.

(1st washer 6)
As shown in FIG. 8, the first washer 6 is composed of a disk having a diameter (outer diameter) β, and a bale-shaped bolt insertion hole 61 eccentric from the center 6a of the first washer 6 is formed in the center. Has been done.

The major axis γ (see FIG. 8) of the bale-shaped bolt insertion hole 61 is approximately ½ of the inner diameter α (see FIG. 5) of the bolt insertion hole 11a as shown in FIG. Regardless of the position from which the anchor bolt 4 protrudes, the washer position fixing portions 12a and 12a are configured so that the bolt insertion hole 61 of the first washer 6 can be passed by the rotating washer while preventing lateral displacement. ..

<Example of Use of Building Bonding Hardware 1 of the Embodiment>
Next, an example of using the building joining metal fitting 1 of the embodiment configured as described above will be described.

FIG. 9 shows an example of use of the building joining metal fitting 1 of the embodiment.
As shown in FIG. 9, when the pillar 3 is erected on the foundation concrete 2, the building joint metal fitting 1 is first fixed on the upper surface of the foundation concrete 2, and then the pillar is placed on the receiving plate 13 of the building joint metal fitting 1. 3 Fix the lower end.

To fix the building joint metal fitting 1 to the upper surface of the foundation concrete 2, the upper end of the anchor bolt 4 extending from the foundation concrete 2 is passed through the bolt insertion hole 11a of the substrate 11 of the building joint metal fitting 1 as shown in FIG. It is fastened and fixed with two nuts 5 via the first washer 6. A washer may be interposed between the nut 5 and the first washer 6, or the nut 5 may be fastened by one.

On the other hand, the lower end of the pillar 3 is fixed to the receiving plate 13 of the building joint metal fitting 1 because the lag screw bolt 71 having the female screw portion is built in the lower end of the pillar 3, so that the lag screw is as shown in FIG. The bolt 72 is screwed into the female screw portion of the bolt 71 to fix it. A washer may be interposed between the lug screw bolt 71 and the bolt 72. Of course, the columns and wall panels may be joined by a method other than the lug screw bolts.

In this way, the pillar 3 can be erected on the foundation concrete 2 via the building joint metal fitting 1 of the embodiment.

<Main effects of the building joining hardware 1 according to the embodiment of the present invention>
As described above, in the building joining metal fitting of the embodiment according to the present invention, the lower end portions of each of the pair of side plates 12 and 12 extend from the lower end portions toward the center of the substrate 11, and the first washer 6 Since the washer position fixing portions 12a and 12a for fixing the positions of the above are provided, the washer position fixing portions 12a and 12a can be provided without deteriorating the strength of the substrate 11.

Therefore, when the dowel disclosed in Patent Document 2 described above is lined and projected from the upper surface of the substrate as the washer position fixing portion, an excessive compressive force, shearing force, or other external force is applied to the dowel due to an earthquake or the like. At that time, the dowels may fly off or be crushed, but in the case of the washer position fixing portions 12a and 12a in which the lower ends of the side plates 12 and 12 are bent, a large area of the washer position fixing portions 12a and 12a is secured. Therefore, even if an external force such as an excessive compressive force or shearing force is applied from the first washer 6 to the washer position fixing portions 12a and 12a due to an earthquake or the like, the deformation of the washer position fixing portions 12a and 12a can be suppressed. The pillar 3 can be fixed to the foundation concrete 2 in a stable state.

Further, in the building joining metal fitting 1 of the embodiment, unlike the dowel disclosed in Patent Document 2 described above, the washer position fixing portions 12a and 12a can be provided without affecting the plate thickness of the substrate 11, so that the substrate 11 can be provided. It is possible to improve the strength of the entire building joint metal fitting 1 by increasing the plate thickness of the above.

Further, in the building joint metal fitting 1 of the embodiment, the washer position fixing portions 12a and 12a each have a notch in the lower end portion of each of the pair of side plates 12 and 12, and the lower end portion sandwiched by the notch is bent. Since it is configured to extend toward the center of the substrate 11, the washer position fixing portion can be easily and surely provided.

Further, in the building joint metal fitting 1 of the embodiment, the washer position fixing portions 12a and 12a are bent by floating a part of each of the pair of side plates 12 and 12 from the upper surface of the substrate 11, and the washer position is fixed. Since the upper surfaces of the portions 12a and 12a are flush with or higher than the upper surface of the first washer 6 placed on the substrate 11, when the building joint metal fitting 1 is plated by dipping in a dove or the like, the washer is formed. Since the plating solution spreads to the front side and the back side of the lower end portions of the side plates 12 and 12 through the space between the lower surfaces of the position fixing portions 12a and 12a and the upper surface of the substrate 11, the plating process of the building joint metal fitting 1 is performed reliably and quickly. be able to.

Further, in the building joining metal fitting 1 of the embodiment, unlike the case where the pair of side plates 12 and 12 are simply welded to the substrate 11 to be joined, the seat metal position is fixed by bending the lower ends of the side plates 12 and 12 respectively. Both side surface portions 12a2 and 12a2 of the portions 12a and 12a are also joined by welding, and cuts are made in each of the seat seat position fixing portions 12a and 12a. Therefore, if the curvature of the side plates 12 and 12 is ignored, the welded portions 12a3 and 12a3 of the side surface portions 12a2 and 12a2 of the seat metal position fixing portions 12a and 12a and the welded portions of the seat metal position fixing portion joining legs 12c and 12c are substantially equal to each other. It will be orthogonal.

Therefore, the pair of side plates 12 and 12 with respect to the substrate 11 are not provided at the lower ends of the side plates 12 and 12 by bending the seat metal positions 12a and 12a. When welding around the lower end, it is usually difficult to weld the inner central part, and in order to avoid interference with welding when inserting a seat, etc., there are cases where a place is intentionally not welded. In the building joint metal fitting 1 of the embodiment, the welded portions at the lower ends of the side plates 12 and 12 with respect to the upper surface of the substrate 11 are orthogonal to each other and the welding length becomes long. Compared with the case, the entire building joint metal fitting 1 becomes stronger, and the seismic performance and the like can be improved.

Further, in the building joining metal fitting 1 of the embodiment, the washer position fixing portions 12a and 12a formed by bending the lower ends of the side plates 12 and 12 are floated from the upper surface of the substrate 11, and the washer position fixing portion joining legs 12c and 12c are floated. Since the washer position fixing portions 12a and 12a are joined by welding on both side surface portions 12a2 and 12a2, the load on the material and hardware can be controlled.

Further, in the building joint metal fitting 1 of the embodiment, the washer position fixing portions 12a and 12a of the side plates 12 and 12 have the washer fixing curved surface portions 12a1 and 12a1 curved in the shape of the circumference of the first washer 6, respectively. Then, the position of the first washer 6 was fixed while allowing the rotation of the first washer 6 by the curved surface portions 12a1 and 12a1 for fixing the washer. The contact area with the first washer 6 will be larger than in the case of the dowel protruding from the upper surface of the substrate, and in this respect as well, excessive compression from the first washer 6 to the washer position fixing portions 12a and 12a due to an earthquake or the like. When an external force such as a force or a shearing force is applied, the deformation of the washer position fixing portions 12a and 12a and the substrate 11 can be suppressed, and the pillar 3 can be fixed to the foundation concrete 2 in a stable state. Further, when an external force is applied to the building joint metal fitting 1 such as compression, tension, and shear, the washer position fixing portions 12a and 12a come to grasp or sandwich the first washer 6, and the substrate 11 and the first washer 6 are deformed. Since there is no space, it leads to the effect of suppressing deformation against external force, and since the central portion of the substrate 11 is deformed integrally with the first washer 6, the cross-sectional area increases, and deformation is also suppressed in this respect. However, the proof stress of the building joint metal fitting 1 is improved.

In the description of the above embodiment, the washer position fixing portions 12a and 12a each have two notches at the lower ends of the pair of side plates 12 and 12, respectively, and the washer position fixing portions surrounded by the two notches. Although it is formed and described by bending the forming protrusion 12d, the present invention is not limited to this, and for example, three or more cuts are made in the lower ends of each of the side plates 12 and 12, and the three or more cuts are made. Of course, the protrusion for forming the washer position fixing portion surrounded by the notch may be bent.

In FIG. 10, four cuts are made in the lower ends of each of the side plates 12 and 12, and two protrusions for forming the washer position fixing portion formed by the four cuts are bent, so that two are formed for each side plate 12. An example in which the washer position fixing portions 12a'and 12a' are provided is shown.

As shown in FIG. 10, when two washer position fixing portions 12a'and 12a'are provided for each side plate 12, it is flat as compared with the case where one washer position fixing portion 12a is provided for each side plate 12 of the above-described embodiment. Although the area of the visible washer position fixing portion is reduced, the left and right side surface portions are welded to the upper surface of the substrate 11 for each of the two washer position fixing portions 12a'and 12a', so that the direction of the left and right side surface portions, that is, FIG. Then, since the welding length in the left-right direction increases, the strength of the entire building washer 1 can be improved in this respect.

Further, in the building joining metal fitting 1 according to the present invention, the pair of side plates 12 and 12 are formed so as to be curved so as to approach the center of the substrate 11 in a plan view as shown in FIGS. 1 to 10, respectively. However, the present invention is not limited to this, and as shown in FIG. 11, the side plates 12'and 12'are not curved and are configured as flat surfaces, and 2 are provided at the lower ends of the side plates 12' and 12', respectively. A protrusion for forming a washer position fixing portion sandwiched between the two notches may be bent to provide one washer position fixing portion 12a for each side plate 12', as shown in FIG. The side plates 12'and 12'are not curved and are constructed as flat surfaces, and four notches are made at the lower ends of each of the side plates 12' and 12', and the two protrusions for forming the washer position fixing portion are bent. Of course, two washer position fixing portions 12a'and 12a' may be provided for each side plate 12'.

In particular, in the cases shown in FIGS. 11 and 12, since it is not necessary to bend each of the side plates 12'and 12', manufacturing can be facilitated by that amount, and the side plates 12'and 12'are curved. Although the strength of the entire building joint metal fitting 1 is slightly reduced, one washer position fixing portion 12a (in the case of FIG. 11) or two washer position fixing portions 12a', 12a'for each side plate 12'(FIG. 12). In the case of

Further, in the above description, the first washer 6 in which the eccentric bale-shaped bolt insertion hole 61 is formed as shown in FIG. 8 is used, but in the present invention, it is shown in FIGS. 13 and 14. As described above, even if the second washer 8 whose outer diameter η as shown in FIG. 15 is smaller than the outer diameter β (see FIG. 8) of the first washer 6 is placed on the first washer 6 for use. good.

As shown in FIGS. 15 and 16, the second washer 8 is formed with a perfectly circular bolt insertion hole 81 having an inner diameter that is substantially the same as or slightly larger than the outer diameter of the anchor bolt 4 for passing the anchor bolt 4. The first washer 6 and the second washer 6 are passed through the bolt insertion hole 61 of the first washer 6 and the bolt insertion hole 81 of the second washer 8 placed on the first washer 6. It will be fastened with, for example, two nuts 5 via 8. In this way, since the first washer 6 has a bale-shaped elongated hole, it tilts to one side of the bolt insertion hole 81 (the one with the elongated hole) when an external force is applied. By adding one second washer 8 on the washer 6, the inclination to the first washer 6 can be suppressed.

In the building joint metal fitting 1 of the above embodiment, the fixing metal fittings such as the lug screw bolt 71 for fixing to the pillar 3 are described without being fixed on the receiving plate 13, but the present invention is not limited to this and drifts in advance. Of course, a fixing bracket provided with a pin hole into which a pin (not shown) or the like is inserted may be provided on the receiving plate 13 by welding or the like.

Further, in the building joint metal fitting 1 of the above embodiment, the lower surfaces of the washer position fixing portions 12a and 12a are floated (separated) by a few mm from the upper surface of the substrate 11 by about 2 mm to 6 mm. This is because the thickness of the first washer 6 is several mm larger than the thickness of the side plates 12 and 12 by about 2 mm to 6 mm, and when the thickness of the first washer 6 is the same as the thickness of the side plates 12 and 12, the washer position. The lower surfaces of the fixing portions 12a and 12a may be provided without floating (separating) from the upper surface of the substrate 11.

1 Building joint hardware 11 Board 11a Bolt insertion hole α Inner diameter of bolt insertion hole 12 Side plate 12a Washer position fixing part 12a1 Washer fixing curved surface part 12a2 Both side parts 12a3 Welding part 12c Washer position fixing part Joining leg 12d Washer position fixing part Protruding part for formation 13 Receiving plate 13a Through hole for fixing bracket 2 Foundation concrete 3 Pillar 4 Anchor bolt 5 Nut 6 1st washer (washer)
6a Center of 1st washer β Outer diameter of 1st washer 61 Bolt insertion hole γ Long diameter of bolt insertion hole 71 Lag screw bolt 72 Bolt 8 2nd washer (washer)
81 Bolt insertion hole η Outer diameter of second washer

Claims (5)

A pair of side plates facing each other with an operating gap of a nut screwed into the anchor bolt are erected on a substrate provided with a bolt insertion hole for inserting an anchor bolt protruding from the foundation concrete, and a structure is provided on the side plate. It is a building joint metal fitting configured to provide a receiving plate on which a material is placed and fixed, and to fasten the tip of the anchor bolt through which the bolt insertion hole is inserted with a nut via a washer.
The lower end portion of each of the pair of side plates is provided with a washer position fixing portion extending from each lower end portion toward the center of the substrate and fixing the position of the washer. .. In the building joining hardware according to claim 1,
Each of the washer position fixing portions is configured to extend toward the center of the substrate by making a notch in the lower end portion of each of the pair of side plates and bending a part of the lower end portion thereof. Joining hardware for. In the building joining hardware according to claim 2.
Each of the washer position fixing portions is bent so that a part of each of the pair of side plates is floated from the upper surface of the substrate, and the upper surface of the washer position fixing portion is of the washer placed on the substrate. Architectural washers characterized by being flush with or higher than the top surface. In the building joining hardware according to any one of claims 1 to 3.
Each of the washer position fixing portions has a washer fixing curved surface portion curved in the shape of the circumference of the washer, and the position of the washer is fixed by the washer fixing curved surface portion. hardware. In the building joining hardware according to any one of claims 1 to 4.
A building joint metal fitting characterized in that the washer is used as a first washer and a second washer having an outer diameter smaller than the outer diameter of the first washer is provided on the first washer.

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