JP6716202B2

JP6716202B2 - Building hardware

Info

Publication number: JP6716202B2
Application number: JP2015117394A
Authority: JP
Inventors: 潤坂野; 元樹菊田
Original assignee: 株式会社タナカ
Priority date: 2015-06-10
Filing date: 2015-06-10
Publication date: 2020-07-01
Anticipated expiration: 2035-06-10
Also published as: JP2017002566A

Description

本発明は、土台などの木製の建築部材を接合する際に、両建築部材に配置して使用する主に平板状である建築用金物に関する。 TECHNICAL FIELD The present invention relates to a building metal piece that is mainly in a flat plate shape and is used by arranging wooden building members such as a base when joining them.

土台などの木製の構造材同士の接合部を外側から補強する際に、両構造材にわたって、短冊金物と称する平板状の金物を当てて、金物側からビスを打ち込んでいた。短冊金物は様々な形状があるが（例えば、特許文献１，２）、いずれも想定する金物の軸方向を引張力が作用する方向として、引張方向の側縁は、一般に凹凸が形成されていなかった。 When reinforcing a joint between wooden structural materials such as a base from the outside, a flat metal object called a strip metal object was applied across both structural materials, and a screw was driven from the metal object side. Although the strip metal has various shapes (for example, Patent Documents 1 and 2), the side edges in the tensile direction are generally not formed with unevenness with the assumed axial direction of the metal being the direction in which the tensile force acts. It was

登録実用３０８４９３９号公報Registered utility 3084939 bulletin 意匠登録１４１６３０８号公報Design Registration No. 1416308

長方形の場合、引張力は、引張が作用する断面、すなわち、幅Ｄ_０×厚さｔ_０の断面に作用すると考えられ、断面欠損につながるので、Ｄ_０を小さくするような切り欠きなどは設けることがなかった。 In the case of a rectangle, it is considered that the tensile force acts on the cross section on which the tension acts, that is, the cross section of width D ₀ ×thickness t ₀ , which leads to a cross-section defect. Therefore, a notch or the like for reducing D ₀ is provided. Never happened.

前記従来の技術では、側縁の切り欠きをできるだけ無くすることが常識であったが、発明者は、側縁で、小さな凹部（切り欠き、くぼみ）であれば、断面欠損による強度の減少もほとんど無く、かえって粘りが生じることを突き止めた。 In the above-mentioned conventional technique, it was common sense to eliminate the notches on the side edges as much as possible, but the inventor has found that if the side edges have small recesses (notches, dents), the strength may be reduced due to a cross-section defect. Almost nothing was found, but rather, tenacity occurred.

即ちこの発明は、木製の構造材同士の接合部を外側から補強する建築用金物であって、平板状の金物基体の一端部および他端部に、第１ビス孔群および第２ビス孔群をそれぞれ形成し、以下のように構成したことを特徴とした建築用金物である。
(1) 前記金物基体で、前記第１ビス孔群と前記第２ビス孔群との間に、ビス孔の無い中間部を形成した。
(2) 前記第１ビス孔群から前記第２ビス孔群に向かう方向であって、前記金物基体の両側縁で、前記中間部付近に、他方の側縁側に向けて構造くぼみを対向して形成した。
(3) 前記ビス孔はビスの軸部が通る透孔の周囲を、表面側から裏面側に押し込み使用するビスの頭部を収容する収容凹入部を形成し、かつ前記透孔の縁に前記裏面側に向けた筒状突起を形成した。
(4) 前記構造くぼみは、前記金物基体の一の側縁から他の側縁に向けて凸となるような曲線状の縁を形成し、かつ、前記側縁の長さ方向で、前記側縁部分で最大長さとして、中心側に向かうにつれて、徐々に側縁方向の長さを小さく形成した。
(5) 前記金物基体は、前記金物基体の側縁方向の両端縁に他方の端縁に向けて凸となる補助くぼみを形成した。 That is, the present invention is a building metal fitting for reinforcing a joint between wooden structural members from the outside, wherein a first screw hole group and a second screw hole group are provided at one end and the other end of a flat metal base. The above is a metal fitting for construction characterized in that each of them is formed and configured as follows.
(1) In the metal base, an intermediate portion having no screw hole is formed between the first screw hole group and the second screw hole group.
(2) In a direction from the first screw hole group toward the second screw hole group, at both side edges of the metal base, near the intermediate portion, facing the structural recess toward the other side edge side. Formed.
(3) The screw hole is formed around the through hole through which the shaft of the screw passes, from the front surface side to the back surface side to form a housing recess for housing the head of the screw to be used, and at the edge of the through hole. A cylindrical projection facing the back side was formed.
(4) The structural recess forms a curved edge that is convex from one side edge of the metal base toward the other side edge, and in the longitudinal direction of the side edge, the side edge is formed. As the maximum length at the edge portion, the length in the side edge direction was gradually reduced toward the center side.
(5) In the metal base, auxiliary recesses are formed at both end edges in the side edge direction of the metal base so as to be convex toward the other end.

さらに、他の発明は、以下のように、平板状の建築用金物を使用して構成したことを特徴とした木造建築構造である。
１．前記建築用金物を以下のように構成した。
(1) 前記建築用金物は、板状の金物基体の一端部および他端部に、第１ビス孔群および第２ビス孔群をそれぞれ形成した。
(2) 前記金物基体で、前記第１ビス孔群と前記第２ビス孔群との間に、ビス孔の無い中間部を形成した。
(3) 前記第１ビス孔群から前記第２ビス孔群に向かう方向であって、前記金物基体の両側縁で、前記中間部付近に、他方の側縁側に向けて構造くぼみを対向して形成した。
(4) かつ、前記ビス孔はビスの軸部が通る透孔の周囲を、表面側から裏面側に押し込み使用するビスの頭部を収容する収容凹入部を形成し、かつ前記透孔の縁に前記裏面側に向けた筒状突起を形成した。
(5) 前記構造くぼみは、前記金物基体の一の側縁から他の側縁に向けて凸となるような曲線状の縁を形成し、かつ、前記側縁の長さ方向で、前記側縁部分で最大長さとして、中心側に向かうにつれて、徐々に側縁方向の長さを小さく形成した。
(6) 前記金物基体は、前記金物基体の側縁方向の両端縁に他方の端縁に向けて凸となる補助くぼみを形成した。
２．横架材他の木製の構造材同士を、接合端面で接合して、前記接合端面の外側に前記建築用金物を配置して、前記構造くぼみを前記接合端面に合わせた。
３．前記建築用金物のビス孔に、表面側から裏面側に向けて前記ビスを打ち込み、前記収容凹入部に前記ビスの頭部を収容して、前記建築用金物と木製の構造材とを固定した。 Et al is, another aspect of the present invention, as described below, a wooden building structures characterized in that it is constructed using a flat architectural hardware.
1. The building hardware was constructed as follows.
(1) In the building hardware, a first screw hole group and a second screw hole group are formed at one end and the other end of a plate-shaped metal base, respectively.
(2) In the metal base, an intermediate portion having no screw hole is formed between the first screw hole group and the second screw hole group.
(3) In the direction from the first screw hole group toward the second screw hole group, on both side edges of the metal base, in the vicinity of the intermediate portion, facing the structural recess toward the other side edge side. Formed.
(4) Further, the screw hole forms an accommodation recess for accommodating the head of the screw to be used by pushing the periphery of the through hole through which the screw shaft portion passes from the front surface side to the back surface side, and the edge of the through hole. A cylindrical protrusion facing the back side was formed.
(5) The structural recess forms a curved edge that is convex from one side edge of the metal base to the other side edge, and in the lengthwise direction of the side edge, the side edge is formed. As the maximum length at the edge portion, the length in the side edge direction was gradually reduced toward the center side.
(6) In the metal base, auxiliary recesses are formed at both end edges in the side edge direction of the metal base so as to be convex toward the other end.
2. Wooden structural materials such as a cross member were joined together at their joint end faces, the building hardware was placed outside the joint end faces, and the structural recesses were aligned with the joint end faces.
3. In the screw hole of the building hardware, the screw was driven from the front surface side toward the back surface, the head of the screw was housed in the housing recess, and the building hardware and the wooden structural material were fixed. ..

前記における金物基体の外形は通常は長方形であるが、使用場所により任意である。したがって、長方形や段々に形状が変化する金物基体の両側縁は、通常は平行である。大径や三角形の金物の場合には、平行ではなく斜めに対応する。 The outer shape of the metal base in the above is usually rectangular, but it is optional depending on the place of use. Therefore, both side edges of the metal base having a rectangular shape or a gradually changing shape are generally parallel to each other. For large-diameter or triangular metal objects, they should be handled diagonally instead of parallel.

前記における「凸となるような曲線状の縁」は、主には真円の一部、楕円の一部など円状であるが、角を丸めた長方形、角を丸めた台形なども含まれる。 The above-mentioned "convex curved edge" is mainly a circle such as a part of a perfect circle or a part of an ellipse, but also includes a rectangle with rounded corners, a trapezoid with rounded corners, etc. ..

前記における建築用金物は、主に平板状（短冊状）であるが、この平板状の金物基体に他の板片などを加えて立体状に形成され、同様に使用される建築用金物も含む。 The building hardware in the above is mainly in the form of a flat plate (strip), but it is also formed in a three-dimensional shape by adding other plate pieces, etc. to this flat metal base, and also includes the building hardware used in the same manner. ..

この発明は、平板状の金物基材で、ビス孔群とビス孔群の間の中間部分で、長さ方向の側縁に構造くぼみを形成したので、建築用金物に引張力が作用した場合、建築用金物の破壊を遅らせ、粘り効果を持たせることで、より安全性を高める機能を持った建築用金物を実現できる効果がある。 The present invention is a flat metal base material, in which a structural recess is formed on the side edge in the longitudinal direction at the intermediate portion between the screw hole groups, so that when a tensile force acts on the building hardware. By delaying the destruction of building hardware and providing a tenacity effect, it is possible to realize a building hardware having a function of further increasing safety .

この発明の金物で、（ａ）は平面図、（ｂ）は左側面図、（ｃ）は正面図を表す。In the hardware of the present invention, (a) is a plan view, (b) is a left side view, and (c) is a front view. この発明の金物で、（ａ）は背面図、（ｂ）は構造くぼみの拡大正面図、（ｃ）はビス孔の拡大断面図を表す。In the hardware of the present invention, (a) is a rear view, (b) is an enlarged front view of a structural recess, and (c) is an enlarged sectional view of a screw hole. （ａ）（ｂ）は、この発明の金物を木材に取り付けた状態を表す斜視図である。(A) and (b) are perspective views showing the state which attached the metal fittings of this invention to the wood. 引張試験用の試験体で、（ａ）はこの発明の金物、（ｂ）比較例の金物、を表す。In the tensile test specimen, (a) represents the metal article of the present invention and (b) the metal article of the comparative example. 引張試験を表す写真で、（ａ）は全体、（ｂ）はこの発明の金物を試験体としている拡大図、（ｃ）は比較例の金物を試験体としている拡大図を表す。In the photographs showing the tensile test, (a) shows the whole, (b) shows an enlarged view of the metal of the present invention as a test body, and (c) shows an enlarged view of the metal of the comparative example as a test body. 引張試験の結果を表すグラフである。It is a graph showing the result of a tensile test. （ａ）〜（ｈ）は、この発明の金物基体の他の実施形態を表す正面図である。(A)-(h) is a front view showing other embodiment of the metal base|substrate of this invention. （ａ）〜（ｃ）は、この発明の構造くぼみの他の実施形態を表す一部拡大正面図である。(A)-(c) is a partially expanded front view showing other embodiment of the structure hollow of this invention.

図面に基づきこの発明の実施形態を説明する。 An embodiment of the present invention will be described with reference to the drawings.

１．金物３０の構成 1. Structure of hardware 30

（１）厚さｔ_０の鋼板から、長さＬ_０、幅Ｄ_０の長方形として、四隅部６、６を斜めに切り欠いて、金物基体１とする。金物基体１の一端２側、他端２側に、それぞれ５つのビス孔１０、１０を設けて、ビス孔群１５、１５とし、両ビス孔群１５、１５の間にビス孔１０を設けない中間部１７が形成される（図１（ｃ））。
ビス孔１０は、ビス３７の軸部３８ａが通る透孔１１の周囲を、表面側１ａから裏面１ｂ側に押し込み使用するビス３７の頭部３８ｂを収容する収容凹入部１２を形成してなる。また、ビス孔１０は、透孔１１の縁に裏面１ｂ側に向けて筒状突起１３を形成する（図２（ｃ））。筒状突起１３は、使用する木材に打ち込まれる。 (1) From a steel plate having a thickness t ₀ , a rectangular body having a length L ₀ and a width D ₀ is formed by obliquely cutting the four corners 6 and 6 to form the metal base 1. Five screw holes 10 and 10 are provided on one end 2 side and the other end 2 side of the metal base 1, respectively, to form screw hole groups 15 and 15, and the screw hole 10 is not provided between the screw hole groups 15 and 15. The intermediate portion 17 is formed (FIG. 1C).
The screw hole 10 is formed with an accommodation recess 12 for accommodating a head portion 38b of the screw 37 which is used by pressing the periphery of the through hole 11 through which the shaft portion 38a of the screw 37 passes from the front surface side 1a to the back surface 1b side. Further, the screw hole 10 has a cylindrical protrusion 13 formed at the edge of the through hole 11 toward the back surface 1b (FIG. 2(c)). The tubular protrusion 13 is driven into the wood to be used .

（２）ビス孔群１５、１５は、以下のように構成する（図１（ｃ））。
Ｌ_０方向の中央線８からＬ_０方向に（端縁２、３側に）それぞれ距離Ｌ_１０離して、１つのビス孔１０Ａを設け（第一列）、
ビス孔１０ＡからＬ_０方向に（端縁２、３側に）それぞれ距離Ｌ_１１離して、２つのビス孔１０Ｂ、１０Ｂを設け（第二列）、
ビス孔１０ＢからＬ_０方向に（端縁２、３側に）それぞれ距離Ｌ_１２離して、２つのビス孔１０Ｃ、１０Ｃを設けてある（第三列）。
また、ここで、ビス孔１０ＣからＬ_０方向に、端縁２、３との距離をＬ_１３とし、Ｌ_１１＜Ｌ_１２としてある。
また、幅Ｄ_０方向で、
ビス孔１０Ｂ同士の間隔をＤ_１１
ビス孔１０Ｃ同士の間隔をＤ_１２
として、Ｄ_１１＜Ｄ_１２としてある。また、ビス孔１０Ａは、ビス孔１０Ｂ、１０Ｂ、ビス孔１０Ｃ、１０Ｃは、それぞれ幅Ｄ_０方向で中央に位置している。
なお、Ｌ_０方向で中央線８として、中央線８から端縁２までの距離、中央線８から端縁３までの距離は、いずれも「（１／２）Ｌ_０」となる。
なお、ビス孔群１７のビス１０の構成は、上記構成が好ましいが、他の配置、本数で構成することもできる（図示していない）。 (2) The screw hole groups 15 and 15 are configured as follows (FIG. 1C).
L ₀ direction of the central line 8 (the edge 2,3 side) _{L 0} direction away respectively distances _{L 10,} provided one screw hole 10A (first row),
Two screw holes 10B and 10B are provided at a distance of L ₁₁ from the screw hole 10A in the L ₀ direction (toward the edges 2 and 3) (second row),
Bis from the hole 10B (the edge 2,3 side) _{L 0} direction away respectively distances _{L 12,} 2 two screw holes 10C, is provided with 10C (third column).
Further, here, the distance from the screw hole 10C in the L ₀ direction to the end edges 2 and 3 is L _13, and L ₁₁ <L ₁₂ .
Also, in the width D ₀ direction,
The distance between the screw holes 10B is D ₁₁
The distance between the screw holes 10C is D ₁₂
As D ₁₁ <D ₁₂ . Further, the screw hole 10A is located at the center in the width D ₀ direction of the screw holes 10B and 10B and the screw holes 10C and 10C, respectively.
The distance from the center line 8 to the edge 2 and the distance from the center line 8 to the edge 3 are both “(1/2)L ₀ ”as the center line 8 in the L ₀ direction.
The screw 10 of the screw hole group 17 preferably has the above-mentioned configuration, but may have another arrangement and number (not shown).

（３）金物基体１の中間部１７で、長さＬ_０方向の側縁４、５で、長さＬ_０の中央位置に他方の側縁５、４に向けて凸となる構造くぼみ２０を形成する（図１（ｃ））。構造くぼみ２０は、側縁４、５側が弦２１となる部分円状で、側縁３、４の弦２１の部分が長さＬ_１で、部分円の先端（円周）２２までの長さ（幅Ｄ_０方向、Ｌ_０と直交する方向）をＤ_１とする（図１（ｃ）、図２（ｂ））。 (3) In the middle portion 17 of the metal base 1, the structural dents 20 are formed at the side edges 4 and 5 in the length L ₀ direction and are convex toward the other side edges 5 and 4 at the center position of the length L _0. Formed (FIG. 1(c)). The structural recess 20 has a partial circular shape with the chords 21 on the side edges 4 and 5, the chord 21 of the side edges 3 and 4 has a length L ₁ , and a length up to the tip (circumference) 22 of the partial circle. (Width D ₀ direction, direction orthogonal to L ₀ ) is defined as D ₁ (FIG. 1(c), FIG. 2(b)).

（４）また、金物基体１の幅Ｄ_０方向の端縁２、３で、幅Ｄ_０の中央位置に他方の端縁３、２に向けて凸となる補助くぼみ２４、２４をそれぞれ形成する。補助くぼみ２４は、側縁２、３側が弦となる部分円状で、端縁２、３の弦の部分が長さＬ_２で、部分円の先端（円周）までの長さ（長さＬ_０方向）をＤ_２とする（図１（ｃ））。ここでは、Ｌ_２＝Ｌ_１、Ｄ_２＝Ｄ_１、としてある。 (4) Further, at the edges 2 and 3 in the width D ₀ direction of the metal base 1, auxiliary recesses 24 and 24 are formed at the center position of the width D _{0 so} as to be convex toward the other edges 3 and 2, respectively. .. The auxiliary recess 24 has a partial circular shape in which the side edges 2 and 3 are chords, the chord portion of the end edges 2 and 3 has a length L ₂ , and the length (length) up to the tip (circumference) of the partial circle. Let D ₂ be the L ₀ direction) (FIG. 1( c )). Here, it is assumed that L ₂ =L ₁ and D ₂ =D ₁ .

（５）以上のようにして、この発明の金物３０を構成する（図１、図２）。 (5) The hardware 30 of the present invention is configured as described above (FIGS. 1 and 2).

（６）例えば、以下のような寸法を適用する（図１）。
金物基体１：ｔ_０＝０．６ｍｍ
金物基体１：Ｌ_０＝２５０ｍｍ
金物基体１：Ｄ_０＝５０ｍｍ
構造くぼみ２０：Ｌ_１＝１２ｍｍ
構造くぼみ２０：Ｄ_１＝２ｍｍ
補助くぼみ２４：Ｌ_２＝１２ｍｍ
補助くぼみ２４：Ｄ_２＝２ｍｍ
ビス孔１０間隔：Ｌ_１０＝４０ｍｍ
ビス孔１０間隔：Ｌ_１１＝２５ｍｍ
ビス孔１０間隔：Ｌ_１２＝３５ｍｍ
ビス孔１０間隔：Ｌ_１３＝２５ｍｍ
ビス孔１０間隔：Ｄ_１１＝２０ｍｍ
ビス孔１０間隔：Ｄ_１２＝２６ｍｍ
この場合、
Ｌ_１／Ｌ_１０＝１２／４０＝０．３
Ｄ_１／Ｌ_１０＝２／４０＝０．０５
Ｌ_１／Ｌ_０＝１２／２５０＝０．０４８
Ｄ_１／Ｄ_０＝２／５０＝０．０４
で形成されるが、ねばりの効果、断面欠損の影響を考慮すれば、一般に最も中心側のビス（ビス孔１０Ａ）がねばりに作用するとの考えがあり、
Ｌ_１／Ｌ_１０＝０．０５〜０．４（Ｌ_１＝２〜１６ｍｍ）
Ｄ_１／Ｌ_１０＝０．０２５〜０．１２５＝（Ｄ_１＝１ｍｍ〜５ｍｍ）
が望ましい。
また、同様に、全体的な長さＬ_０と幅Ｄ_０も関係すると考えられ、
Ｌ_１／Ｌ_０＝０．０２〜０．０６（Ｌ_１＝２ｍｍ〜１５ｍｍ）
Ｄ_１／Ｄ_０＝０．０２〜０．１０（Ｄ_１＝１ｍｍ〜５ｍｍ）
程度が望ましい。 (6) For example, the following dimensions are applied (FIG. 1).
Metal substrate 1: t ₀ =0.6 mm
Metal substrate 1: L ₀ =250 mm
Metal substrate 1: D ₀ =50 mm
Structural depression 20: L ₁ =12 mm
Structural depression 20: D ₁ =2 mm
Auxiliary depression 24: L ₂ =12 mm
Auxiliary depression 24: D ₂ =2 mm
10 intervals between screw holes: L ₁₀ =40 mm
10 intervals between screw holes: L ₁₁ =25 mm
10 intervals between screw holes: L ₁₂ =35 mm
10 intervals between screw holes: L ₁₃ =25 mm
10 intervals between screw holes: D ₁₁ =20 mm
10 intervals between screw holes: D ₁₂ =26 mm
in this case,
L ₁ /L ₁₀ =12/40=0.3
D ₁ /L ₁₀ =2/40=0.05
L ₁ /L ₀ =12/250=0.048
D ₁ /D ₀ =2/50=0.04
However, considering the effect of stickiness and the effect of cross-section loss, it is generally considered that the screw on the center side (the screw hole 10A) acts on stickiness.
L ₁ /L ₁₀ =0.05 to 0.4 (L ₁ =2 to 16 mm)
D ₁ /L ₁₀ =0.025 to 0.125=(D ₁ =1 mm to 5 mm)
Is desirable.
Similarly, the overall length L ₀ and width D ₀ are also considered to be related,
L ₁ /L ₀ =0.02-0.06 (L ₁ =2 mm-15 mm)
_{_{_{D 1 / D 0 = 0.02~0.10 (}}} D 1 = 1mm~5mm)
The degree is desirable.

２．金物３０の使用 2. Use of hardware 30

（１）この金物３０は、いわゆる短冊金物と同様に使用する。例えば、土台などの木製の横架材３１、３１の接合端面３２に、構造くぼみ２０、２０を合わせて、横架材３１、３１の長さ方向にＬ_０方向を合わせて、配置して、各ビス孔１０、１０にビス３７を打ち込んで固定する（図３（ａ））。この場合、構造くぼみ２０、２０を接合端面３２に合わせれば、金物３０の中央位置（接合端面３２位置）を罫書きで入れなくても、Ｌ_０方向の中央位置が容易に合わせることできる。 (1) The metal piece 30 is used in the same manner as a so-called strip metal piece. For example, the structural recesses 20 and 20 are aligned with the joining end surface 32 of the wooden horizontal members 31 and 31 such as a base, and the L ₀ direction is aligned with the length direction of the horizontal members 31 and 31 and arranged. A screw 37 is driven into each of the screw holes 10 and 10 to be fixed (FIG. 3A). In this case, if the structural recesses 20, 20 are aligned with the joint end face 32, the center position in the L ₀ direction can be easily aligned without marking the center position of the metal 30 (position of the joint end face 32).

（２）また、いわゆる短冊金物と同様に、土台などの木製の横架材３１、３１の接合端面３２に、さらに壁などの下地板３４、３４を固定した場合に適用することもできる（図３（ｂ）。この場合、２枚の下地板３４、３４の対向縁３５を横架材３１、３１の長さ方向の側面に合わせた場合、金物３０の補助くぼみ２４、２４を対向縁３５に合わせれば容易に使用位置を決めることができる。したがって、金物３０に対向縁３５位置を罫書きで入れる必要が無い。 (2) Further, like a so-called strip metal object, it can also be applied to a case where base plates 34, 34 such as walls are further fixed to the joint end surface 32 of the wooden horizontal members 31, 31 such as a base (Fig. 3(b). In this case, when the facing edges 35 of the two base plates 34, 34 are aligned with the side surfaces of the horizontal members 31, 31 in the length direction, the auxiliary recesses 24, 24 of the metal piece 30 are positioned at the facing edges 35. The position of use can be easily determined by adjusting the position to the position of 1. Therefore, it is not necessary to mark the position of the facing edge 35 on the metal piece 30 by marking.

（３）また、通常、いわゆる短冊金物を使用する他の箇所に適用することもできる（図示していない）。 (3) Further, it can be applied to other places where a so-called strip metal piece is usually used (not shown).

３．金物３０の性能試験 3. Performance test of hardware 30

（１）次に、この金物３０について、横架材端部接合部（継手型）の引張試験を行った。
試験体４０Ａ（くびれ３０有り）：前記図１の構造の金物３０で、前記の寸法のものを採用する（図４（ａ））。
試験体４０Ｂ（くびれ３０無）」：試験体４０Ａとは構造くびれ３０、補助くびれ２４を設けない点で異なり、他は同じ構造・寸法である（図４（ｂ））。また、ビス孔１０は透孔１１をΦ５．９ｍｍとする。
また、第１木材４１、第２木材４２：上記使用例での横架材３１を想定し、スギ無等級材で、
断面１０５×１０５ｍｍ×長さ５００ｍｍ
とした。
また、ビス３７は、
株式会社タナカ製ＴＢＡ−４５（長さ４３ｍｍ、頭部径９．３ｍｍ）１０本
を使用し、全てのビス孔に打ち込んだ。 (1) Next, with respect to the metal piece 30, a tensile test was performed on a lateral joint material end joint (joint type).
Specimen 40A (with constriction 30): The metal object 30 having the structure shown in FIG. 1 and having the dimensions described above is used (FIG. 4(a)).
Specimen 40B (without constriction 30)": Different from specimen 40A in that structural constriction 30 and auxiliary constriction 24 are not provided, and the other structures and dimensions are the same (Fig. 4(b)). Further, the screw hole 10 has a through hole 11 of Φ5.9 mm.
Further, the first wood 41, the second wood 42: assuming the horizontal material 31 in the above-mentioned use example, cedar-free material,
Cross section 105 x 105 mm x length 500 mm
And
Also, the screw 37 is
Tanaka Co., Ltd. TBA-45 (length 43 mm, head diameter 9.3 mm) 10 pieces were used and driven into all screw holes.

（２）第１木材４１、第２木材４２の接合端面に、試験体４０Ａ（４０Ｂ）を固定して（図５（ｂ）（ｃ））、縦方向に配置して（図５（ａ）の矢示方向）、第１木材４１及び第２木材４２に引張力を与えて「荷重−変位」を測定した（図５（ａ））。 (2) The test body 40A (40B) is fixed to the joint end faces of the first wood 41 and the second wood 42 (FIGS. 5B and 5C) and arranged vertically (FIG. 5A). (Direction indicated by arrow), a tensile force was applied to the first wood 41 and the second wood 42 to measure "load-displacement" (FIG. 5(a)).

（３）試験体４０Ａ（構造くびれ２０有り、補助くびれ２４有り）を３体、試験体４０Ｂ（構造くびれ２０無、補助くびれ２４無）の１体を試験した。
最大荷重を試験体４０Ａ、４０Ｂで比較すると、
試験体４０Ｂ：１７．２ｋＮ
試験体４０Ａ：２０．５ｋＮ、１７．６ｋＮ、１８．２ｋＮ
となり、構造くびれ２０による断面欠損の影響は無いと確認できた（図６）。
また、図６によれば、試験体４０Ａの場合は、試験体１のグラフに比べ、金物の破壊までが遅れる（粘る）ことを確認した。試験体４０Ｂでは、７ｍｍ変位付近で破壊が進みそのまま最終破壊まで下降しているが、各試験体４０Ａでは、破壊が始まった後も粘りがあり、最終破壊を遅らせる効果があったと判断できる。すなわち、試験体４０Ｂにおける最大荷重が生じてから破断するまでの変位より、試験体４０Ａにおける最大荷重が生じてから破断するまでの変位が、２倍以上を得た（図６）。
したがって、試験体４０Ａのように、構造くぼみ２０と補助くぼみ２４とを設けた場合、試験体４０Ｂに設定される最大荷重以上の外力が加わった場合であっても、第１木材４１、第２木材４２の接合部へのダメージが緩和され、接合部が持ちこたえられることがわかった。すなわち、金物３０の破壊を遅らせ、粘り効果を持たせることで、より安全性を高める機能を持った金物３０を実現できた。
なお、これは、引張方向が試験体４０Ａ、４０Ｂの長さ方向であり、主に構造くぼみ２０、２０の効果と考えられ、補助くぼみ２４、２４の影響は少ないと考えられる。 (3) Three test bodies 40A (having a structural constriction 20 and an auxiliary constriction 24) and one test body 40B (no structural constriction 20 and no auxiliary constriction 24) were tested.
Comparing the maximum load between the test bodies 40A and 40B,
Test body 40B: 17.2 kN
Test body 40A: 20.5 kN, 17.6 kN, 18.2 kN
Therefore, it was confirmed that there was no influence of the cross-section loss due to the structural neck 20 (FIG. 6).
Further, according to FIG. 6, in the case of the test body 40A, it was confirmed that the destruction of the metal object was delayed (sticky) as compared with the graph of the test body 1. In the test body 40B, the fracture progresses in the vicinity of the displacement of 7 mm and descends to the final fracture as it is, but in each of the test bodies 40A, there is stickiness even after the fracture starts, and it can be judged that there was an effect of delaying the final fracture. That is, the displacement from the generation of the maximum load in the test body 40B to the fracture was more than double the displacement from the generation of the maximum load in the test body 40A to the fracture (FIG. 6).
Therefore, when the structural recess 20 and the auxiliary recess 24 are provided as in the case of the test piece 40A, even if an external force equal to or larger than the maximum load set for the test piece 40B is applied, the first wood piece 41, the second piece of wood It was found that the damage to the joint of the wood 42 was alleviated and the joint could hold up. That is, by delaying the destruction of the metal piece 30 and providing a tenacity effect, it was possible to realize the metal piece 30 having a function of further increasing safety.
Note that this is because the tensile direction is the length direction of the test bodies 40A and 40B, and is considered to be mainly due to the effect of the structural recesses 20 and 20, and the influence of the auxiliary recesses 24 and 24 is considered to be small.

４．他の構成 4. Other configurations

（１）前記における構造くぼみ２０の形状は、部分円（弦）構造としたが、楕円の一部のような構造（図８（ａ）（ｂ））、隅を丸めた四角形構造とすることもできる（図８（ｃ））。 (1) The shape of the structural depression 20 in the above is a partial circle (chord) structure, but a structure like a part of an ellipse (FIGS. 8A and 8B) and a quadrangular structure with rounded corners. It is also possible (FIG. 8(c)).

（２）また、前記における金物基体１の構造は、長方形で隅部６、６を切り取った形状としたが、隅部６、６を丸めた構造（図７（ａ））、隅部６、６を丸くえぐった構造（図７（ｂ））とすることもでき、また正方形とすることもでき（図示していない）、楕円形（図７（ｃ））、台形（図７（ｄ））、段々形状の台形（図７（ｅ））、三角形（図７（ｆ））とすることもできる。また、通常、いわゆる短冊金物で使用される他の形状で金物基体１を構成することもできる（図示していない）。
また、いわゆる短冊金物で作用されているように、金物基体１の中央部や一隅部に開口２６や切り欠き２７を形成して係止爪２８を設けることもできる（図７（ｇ）（ｈ））。 (2) Further, the structure of the metal base 1 in the above is a rectangular shape in which the corners 6, 6 are cut out, but the structure in which the corners 6, 6 are rounded (FIG. 7A), the corner 6, The structure of 6 may be rounded (FIG. 7(b)) or square (not shown), elliptical (FIG. 7(c)), trapezoidal (FIG. 7(d)). ), a stepped trapezoid (FIG. 7E), and a triangle (FIG. 7F). Further, the metal base 1 can also be constructed in another shape that is usually used for a so-called strip metal (not shown).
Further, as in the case of a so-called strip metal piece, an opening 26 or a notch 27 may be formed in the central portion or one corner of the metal base 1 to provide the locking claw 28 (FIG. 7(g)(h). )).

１金物基体
２、３端縁
４、５側縁
６隅部
８中央線
１０、１０Ａ、１０Ｂ、１０Ｃビス孔
１１ビス孔の透孔
１２ビス孔の収容凹部
１３ビス孔の筒状突起
１５ビス孔群
１７中間部
２０構造くぼみ
２１構造くぼみの弦
２２構造くぼみの先端
２４補助くぼみ
３０金物
３１横架材
３２横架材の接合面
３４下地板
３５下地材の対向縁
３７ビス
３８ａビスの軸部
３８ｂビスの頭部
４０Ａ試験体（くびれ２０、２４有り）
４０Ｂ試験体（くびれ２０、２４無し）
４１第１木材
４２第２木材 DESCRIPTION OF SYMBOLS 1 Hardware base 2, 3 Edge 4, 5 Side edge 6 Corner 8 Center line 10, 10A, 10B, 10C Screw hole 11 Screw hole through hole 12 Screw hole accommodation recess 13 Screw hole cylindrical projection 15 Screw hole Group 17 Middle part 20 Structural dent 21 Structural dent string 22 Structural dent tip 24 Auxiliary dent 30 Auxiliary dent 31 Metal 31 Horizontal material 32 Horizontal material joining surface 34 Base plate 35 Base material facing edge 37 Screw 38a Screw shaft 38b Screw head 40A test body (with constrictions 20 and 24)
40B test body (no constriction 20, 24)
41 first wood 42 second wood

Claims

木製の構造材同士の接合部を外側から補強する建築用金物であって、平板状の金物基体の一端部および他端部に、第１ビス孔群および第２ビス孔群をそれぞれ形成し、以下のように構成したことを特徴とした建築用金物。
(1) 前記金物基体で、前記第１ビス孔群と前記第２ビス孔群との間に、ビス孔の無い中間部を形成した。
(2) 前記第１ビス孔群から前記第２ビス孔群に向かう方向であって、前記金物基体の両側縁で、前記中間部付近に、他方の側縁側に向けて構造くぼみを対向して形成した。
(3) 前記ビス孔はビスの軸部が通る透孔の周囲を、表面側から裏面側に押し込み使用するビスの頭部を収容する収容凹入部を形成し、かつ前記透孔の縁に前記裏面側に向けた筒状突起を形成した。
(4) 前記構造くぼみは、前記金物基体の一の側縁から他の側縁に向けて凸となるような曲線状の縁を形成し、かつ、前記側縁の長さ方向で、前記側縁部分で最大長さとして、中心側に向かうにつれて、徐々に側縁方向の長さを小さく形成した。
(5) 前記金物基体は、前記金物基体の側縁方向の両端縁に他方の端縁に向けて凸となる補助くぼみを形成した。 A building metalwork for reinforcing a joint between wooden structural members from the outside, wherein a first screw hole group and a second screw hole group are formed at one end and the other end of a flat metal base, respectively. A building hardware characterized by being configured as follows.
(1) In the metal base, an intermediate portion having no screw hole is formed between the first screw hole group and the second screw hole group.
(2) In a direction from the first screw hole group toward the second screw hole group, at both side edges of the metal base, near the intermediate portion, facing the structural recess toward the other side edge side. Formed.
(3) The screw hole is formed around the through hole through which the shaft of the screw passes, from the front surface side to the back surface side to form a housing recess for housing the head of the screw to be used, and at the edge of the through hole. A cylindrical projection facing the back side was formed.
(4) The structural recess forms a curved edge that is convex from one side edge of the metal base toward the other side edge, and in the longitudinal direction of the side edge, the side edge is formed. As the maximum length at the edge portion, the length in the side edge direction was gradually reduced toward the center side.
(5) In the metal base, auxiliary recesses are formed at both end edges in the side edge direction of the metal base so as to be convex toward the other end.

以下のように、平板状の建築用金物を使用して構成したことを特徴とした木造建築構造。
１．前記建築用金物を以下のように構成した。
(1) 前記建築用金物は、板状の金物基体の一端部および他端部に、第１ビス孔群および第２ビス孔群をそれぞれ形成した。
(2) 前記金物基体で、前記第１ビス孔群と前記第２ビス孔群との間に、ビス孔の無い中間部を形成した。
(3) 前記第１ビス孔群から前記第２ビス孔群に向かう方向であって、前記金物基体の両側縁で、前記中間部付近に、他方の側縁側に向けて構造くぼみを対向して形成した。
(4) かつ、前記ビス孔はビスの軸部が通る透孔の周囲を、表面側から裏面側に押し込み使用するビスの頭部を収容する収容凹入部を形成し、かつ前記透孔の縁に前記裏面側に向けた筒状突起を形成した。
(5) 前記構造くぼみは、前記金物基体の一の側縁から他の側縁に向けて凸となるような曲線状の縁を形成し、かつ、前記側縁の長さ方向で、前記側縁部分で最大長さとして、中心側に向かうにつれて、徐々に側縁方向の長さを小さく形成した。
(6) 前記金物基体は、前記金物基体の側縁方向の両端縁に他方の端縁に向けて凸となる補助くぼみを形成した。
２．横架材他の木製の構造材同士を、接合端面で接合して、前記接合端面の外側に前記建築用金物を配置して、前記構造くぼみを前記接合端面に合わせた。
３．前記建築用金物のビス孔に、表面側から裏面側に向けて前記ビスを打ち込み、前記収容凹入部に前記ビスの頭部を収容して、前記建築用金物と木製の構造材とを固定した。 A wooden building structure characterized by being constructed by using a flat-shaped building hardware as described below.
1. The building hardware was constructed as follows.
(1) In the building hardware, a first screw hole group and a second screw hole group are formed at one end and the other end of a plate-shaped metal base, respectively.
(2) In the metal base, an intermediate portion having no screw hole is formed between the first screw hole group and the second screw hole group.
(3) In the direction from the first screw hole group toward the second screw hole group, on both side edges of the metal base, in the vicinity of the intermediate portion, facing the structural recess toward the other side edge side. Formed.
(4) Further, the screw hole forms an accommodation recess for accommodating the head of the screw to be used by pushing the periphery of the through hole through which the screw shaft portion passes from the front surface side to the back surface side, and the edge of the through hole. A cylindrical protrusion facing the back side was formed.
(5) The structural recess forms a curved edge that is convex from one side edge of the metal base to the other side edge, and in the lengthwise direction of the side edge, the side edge is formed. As the maximum length at the edge portion, the length in the side edge direction was gradually reduced toward the center side.
(6) In the metal base, auxiliary recesses are formed at both end edges in the side edge direction of the metal base so as to be convex toward the other end.
2. Wooden structural materials such as a cross member were joined together at their joint end faces, the building hardware was placed outside the joint end faces, and the structural recesses were aligned with the joint end faces.
3. In the screw hole of the building hardware, the screw was driven from the front surface side toward the back surface, the head of the screw was housed in the housing recess, and the building hardware and the wooden structural material were fixed. ..