JP4562675B2

JP4562675B2 - How to pull out the connecting pin

Info

Publication number: JP4562675B2
Application number: JP2006083582A
Authority: JP
Inventors: 久美子寺田; 直樹寺田
Original assignee: 木建技研株式会社
Priority date: 2006-03-24
Filing date: 2006-03-24
Publication date: 2010-10-13
Anticipated expiration: 2026-03-24
Also published as: JP2007253300A

Description

本発明は、木造建築物などの構造部材の接合に使用された連結ピンを事後的に引き抜くことを可能にした引抜治具その他に関するものである。 The present invention relates to a drawing jig or the like that enables a connecting pin used for joining a structural member such as a wooden building to be pulled out later.

木造住宅などの木造建築物では、一般に、梁と柱、柱と土台などの接合には、接合金具が使用される。そして、接合金具を使用する場合には、接合金具を木材を確実に係合させるために連結ピンが好適に用いられている。 In a wooden building such as a wooden house, a joint fitting is generally used for joining a beam and a pillar, a pillar and a base, or the like. And when using a joining metal fitting, the connecting pin is used suitably in order to engage a wood with a joining metal fitting reliably.

この連結ピンは、構造部材の内部にきつく叩き込まれるが、連結ピンの打ち込み箇所を間違えた場合だけでなく、例えば、建築物の増改築や取り壊しのために、隣接する構造部材の接合を解きたい場合には、連結ピンを木材から抜く必要がある。 This connecting pin is struck tightly inside the structural member, but not only when the connecting location of the connecting pin is wrong, but for example, to extend or demolish a building, you want to unjoin adjacent structural members In some cases, it is necessary to remove the connecting pin from the wood.

ここで、連結ピンの進入方向に連結ピンを叩き出せる場合には何の問題も無いが、それが不可能であり、連結ピンを逆向きに引き抜くしかない場合がある。かかる場合、テコの原理を応用した連結ピンの引抜治具がまず考えられるが、これでは連結ピンを真っ直ぐに抜くことができず、しかも、木材にも多大な傷をつけてしまうという問題がある。 Here, there is no problem when the connecting pin can be knocked out in the direction of entry of the connecting pin, but this is not possible, and there are cases where the connecting pin must be pulled out in the opposite direction. In such a case, a connecting pin pulling jig applying the lever principle is conceivable. However, in this case, there is a problem that the connecting pin cannot be pulled out straight and the wood is also damaged greatly. .

一方、特許文献１に記載の連結ピンの発明も提案されている。この発明では、連結ピン本体の頭部に平行な一対の扁平面を切り欠くと共に、上記頭部の平坦な頂面中央に外向き開口する回動操作工具用の係止凹溝を切り欠いた連結ピンに、回動操作工具を用いて、連結ピンを構造部材から抜き出している。
特開２００１−４０７８０号公報 On the other hand, an invention of a connecting pin described in Patent Document 1 has also been proposed. In the present invention, a pair of flat surfaces parallel to the head of the connecting pin main body are cut out, and a locking groove for a turning operation tool that opens outwardly at the center of the flat top surface of the head is cut out. The connection pin is extracted from the structural member by using a turning operation tool.
JP 2001-40780 A

しかしながら、特許文献１の連結ピンは、その製造が容易でなく、しかも、使用時には、連結ピンを木材にねじ込む必要があり、その作業が煩雑である。そもそも、一つの建築物の完成には多数の連結ピンを使用するのであるから、そのコストは極力安価であるべきであり、また連結ピンの装着作業についても簡便なものが強く望まれる。また、引き抜き時にも、電動工具を要することなく、直線的に引き抜き可能な連結ピンが望まれる。 However, the connecting pin of Patent Document 1 is not easy to manufacture, and it is necessary to screw the connecting pin into wood when in use, which is complicated. In the first place, since a large number of connecting pins are used to complete one building, the cost should be as low as possible, and a simple connection pin mounting operation is strongly desired. Further, there is a demand for a connecting pin that can be pulled out linearly without requiring an electric tool when being pulled out.

本発明は、上記の要請に基づいてなされたものであって、連結ピンを直線的に引き抜き可能な引抜方法を提供することを目的とする。間接的には、製作コストが安価で装着時の使用も容易であり、且つ事後的にも直線的に容易に引き抜き可能な連結ピンを提供することを目的とする。 The present invention has been made based on the above requirements, and an object of the present invention is to provide a drawing method capable of drawing a connecting pin linearly. Indirectly, an object of the present invention is to provide a connecting pin that is inexpensive to manufacture, can be easily used at the time of mounting, and can be easily pulled out linearly after the fact.

上記の目的を達成するため、請求項１に係る発明は、案内部材（１１）に沿って直線的に移動可能な操作ウェイト（１２）、案内部材の一端側に固着された係止部（１３）、及び、案内部材の他端側に固着されて、操作ウェイトの移動を受け止めるフランジ部（２１）を備える引抜治具（１）と、頭部（３１）、及び、ネジを設けた軸部（３２）を有する補助ネジ（３０）と、を用いて、木造建築物の構造部材に装着され、軸方向に予備孔を有する連結ピン（ＰＮ）を事後的に引き抜く引抜方法であって、木造建築物の構造部材に装着された連結ピンの前記予備孔に、ネジ切り工具を使用して、補助ネジのネジに対応するネジ溝を設ける第一工程と、補助ネジの頭部（３１）と連結ピン（ＰＮ）との間に所定の隙間が形成される程度に、連結ピンのネジ溝に補助ネジをねじ込んで、補助ネジと連結ピンとを一体化させる第二工程と、補助ネジの頭部（３１）と連結ピン（ＰＮ）との間に形成された隙間に、引抜治具の係止部（１３）を係止させる第三工程と、係止部を係止させた状態で、操作ウェイト（１２）を引抜治具の基端側に打ち付ける第四工程と、をこの順番で実行することによって、木造建築物の構造部材に装着された連結ピンを、事後的に直線的に引き抜くことを特徴とする。 In order to achieve the above object, the invention according to claim 1 includes an operation weight (12) movable linearly along the guide member (11), and a locking portion (13) fixed to one end side of the guide member. ) And a pulling jig (1) having a flange portion (21) that is fixed to the other end of the guide member and receives movement of the operation weight, a head portion (31), and a shaft portion provided with a screw. an auxiliary screw having a (32) (30), with, mounted to a structural member of a wooden building, connecting pin (PN) a posteriori pull pulling method having a pre-hole in the axial direction, wooden A first step of providing a screw groove corresponding to the screw of the auxiliary screw in the spare hole of the connecting pin mounted on the structural member of the building using a threading tool; and a head (31) of the auxiliary screw; Connected to the extent that a predetermined gap is formed between the connecting pin (PN) The auxiliary screw is screwed into the screw groove of the second screw, and the auxiliary screw and the connecting pin are integrated into the second step, and the gap formed between the auxiliary screw head (31) and the connecting pin (PN) is pulled out. A third step of locking the locking portion (13) of the jig, and a fourth step of hitting the operation weight (12) against the proximal end side of the extraction jig with the locking portion locked. By executing in this order, the connecting pins attached to the structural members of the wooden building are pulled out linearly afterwards.

ここで、前記連結ピンの一部には、他の部分より径方向に大きい大径部が設けられているのが好ましい。また、前記大径部は、加圧変形された隆起部であるか、或いは、前記大径部は、軸方向の基端側が先端側より均一に大径となり、且つ、そこには網目状の凹凸が形成されているのが好ましい。 Here, it is preferable that a part of the connecting pin is provided with a large-diameter part that is larger in the radial direction than the other part. The large-diameter portion is a pressure-deformed raised portion, or the large-diameter portion has a larger diameter on the proximal end side in the axial direction than the distal end side, and there is a mesh-like shape. It is preferable that irregularities are formed.

上記した各発明によれば、木造建築物の構造部材に装着された連結ピンを直線的に引き抜くことができる。
According to the invention described above, the connecting pin mounted to a structural member of wooden buildings linearly can pull must be unplugged.

本発明を実施形態に基づき以下に説明する。図１は、第１実施例に係る引抜治具１を示す図であり、図１（ａ）は、引抜治具１を図１（ｂ）のＢ−Ｂ線に沿って切断した中央断面図、図１（ｂ）は、図１（ａ）のＡ−Ａ方向に見た係止部１３の拡大正面図、図１（ｃ）は、係止部１３の一部を破断して図示した斜視図である。 The present invention will be described below based on embodiments. FIG. 1 is a view showing a drawing jig 1 according to the first embodiment, and FIG. 1A is a central sectional view of the drawing jig 1 cut along the line BB in FIG. 1B. FIG. 1B is an enlarged front view of the locking portion 13 viewed in the AA direction of FIG. 1A, and FIG. 1C is a partially broken view of the locking portion 13. It is a perspective view.

図１（ａ）に示す通り、この引抜治具１は、円柱形状の案内棒１１と、案内棒１１に遊嵌される略円筒状の操作ウェイト１２と、案内棒１１の先端側に固着される係止部１３と、案内棒１１の基端側に固着される保持部１４とで構成されている。前記の各部材１１〜１４は、鋼鉄などの金属製であり、操作ウェイト１２を除いて、全体が強固に一体化されている。 As shown in FIG. 1A, the extraction jig 1 is fixed to a columnar guide rod 11, a substantially cylindrical operation weight 12 that is loosely fitted to the guide rod 11, and the distal end side of the guide rod 11. And a holding portion 14 fixed to the proximal end side of the guide rod 11. Each of the members 11 to 14 is made of metal such as steel, and the whole is firmly integrated except for the operation weight 12.

案内棒１１は、典型的には鋼鉄製の丸棒が使用され、案内棒１１の本体部１１ａの両端には、やや小径の取付部１１ｂ，１１ｃが突出形成されている。 As the guide rod 11, a steel round rod is typically used, and mounting portions 11b and 11c having slightly small diameters are formed on both ends of the main body portion 11a of the guide rod 11.

操作ウェイト１２は、全体として略円筒状に形成され、軸方向中央の把持部１２ａと、把持部１２ａの両端の大径フランジ１２ｂとに区分される。この操作ウェイト１２には、径方向中央部を軸方向に貫通して挿通孔１５が設けられ、挿通孔１５の内径は、案内棒１１の外径よりもやや大きく形成されている。また、把持部１２ａには、人間の指に対応した凹部が形成されて、全体として、軸方向に波形の外周輪部を有している。 The operation weight 12 is formed in a substantially cylindrical shape as a whole, and is divided into a grip portion 12a at the center in the axial direction and large-diameter flanges 12b at both ends of the grip portion 12a. The operation weight 12 is provided with an insertion hole 15 penetrating the central portion in the radial direction in the axial direction. The inner diameter of the insertion hole 15 is slightly larger than the outer diameter of the guide rod 11. In addition, the grip portion 12a is formed with a concave portion corresponding to a human finger and has a corrugated outer ring portion in the axial direction as a whole.

図１（ｂ）（ｃ）に示すように、係止部１３は、略直方体状の基端部１６と、基端部１６から先端に向けて略Ｕ字状に延びる延設部１７とに区分される。そして、基端部１６には、案内棒１１の先端側取付部１１ｂが圧入される収容取付孔１６ａが貫通して形成されている。 As shown in FIGS. 1B and 1C, the locking portion 13 includes a substantially rectangular parallelepiped base end portion 16 and an extending portion 17 extending from the base end portion 16 toward the front end in a substantially U shape. It is divided. The base end portion 16 is formed with a housing mounting hole 16a through which the distal end side mounting portion 11b of the guide rod 11 is press-fitted.

一方、延設部１７は、その底部に設けられた作業部１８と、作業部１８の両側から垂直に立上がる側壁部１９とに区分され、この側壁部１９によって、係止部１３の先端側には、略Ｕ字状の開口溝が形成されている。 On the other hand, the extending portion 17 is divided into a working portion 18 provided at the bottom thereof and a side wall portion 19 rising vertically from both sides of the working portion 18, and the side wall portion 19 is used to separate the distal end side of the locking portion 13. Is formed with a substantially U-shaped opening groove.

延設部１７の底部に設けられた作業部１８は、後述する引抜作業用の補助ネジ３０（図４参照）を引掛ける部分である。そのため、作業部１８は、補助ネジ３０の軸部３２を受け入れる導入部１８ａと、受け入れた補助ネジ３０の頭部３１を係止する作業本体部１８ｂとに区分されている（図１（ｃ））。図示の通り、導入部１８ａは、補助ネジ３０の軸部３２を受け入れやすいよう、先端に向けて広がっている。また、作業本体部１８ｂは、補助ネジ３０の軸部３２よりやや大径で、補助ネジ３０の頭部３１より確実に小径の円弧形状を有している。 The working part 18 provided at the bottom of the extending part 17 is a part for hooking an auxiliary screw 30 (see FIG. 4) for pulling work described later. Therefore, the working part 18 is divided into an introduction part 18a that receives the shaft part 32 of the auxiliary screw 30 and a work main body part 18b that locks the head part 31 of the received auxiliary screw 30 (FIG. 1C). ). As shown in the drawing, the introduction portion 18a extends toward the tip so that the shaft portion 32 of the auxiliary screw 30 can be easily received. Further, the work main body portion 18 b has a slightly larger diameter than the shaft portion 32 of the auxiliary screw 30 and a small-diameter arc shape surely smaller than the head portion 31 of the auxiliary screw 30.

作業部１８の肉厚Ｈは、これが厚いほど引抜強度に優れるが、余り厚いと作業性に劣るので、十分な強度を有する前提で必要最小限の厚さに設定されている。また、作業本体部１８ｂは、補助ネジ３０の頭部３１を受け入れるに必要な最小限の左右幅Ｗ及び前後幅に設定されている（図１（ｂ））。 As the thickness H of the working portion 18 increases, the pulling strength is improved. However, if the thickness is too thick, the workability is inferior, and therefore the workability is inferior. Further, the work main body portion 18b is set to the minimum left-right width W and front-rear width necessary for receiving the head 31 of the auxiliary screw 30 (FIG. 1B).

この実施例では、一対の側壁部１９，１９が、作業部１８の両側で基端部１６と同一高さまで立設されている。そのため、後述する引抜作業を繰り返しても、作業部１８が十分な引抜強度を維持する。 In this embodiment, the pair of side wall portions 19, 19 are erected up to the same height as the base end portion 16 on both sides of the working portion 18. Therefore, the working unit 18 maintains a sufficient pulling strength even if the pulling operation described later is repeated.

図１（ａ）に示す通り、保持部１４は、丸棒状の円柱部２０と、略四角形の四隅がコーナー加工された矩形板状のフランジ部２１とで構成されている。円柱部２０の先端側には、やや小径の突出固定部２０ａが形成され、突出固定部２０ａには、案内棒１１の基端側取付部１１ｃと同径の円柱取付孔２２が形成されている。ここで、突出固定部２０ａの外径は、案内棒１１の本体部１１ａの外径よりも大径に形成されている。また、円柱取付孔２２の深さは、案内棒１１の基端側取付部１１ｃの軸方向長さよりやや深く形成されている。そのため、案内棒１１の基端側取付部１１ｃが円柱取付孔２２に圧入された状態では、案内棒の本体部１１ａの基端面と、突出固定部２０ａ先端面とが確実に当接することになる。 As shown in FIG. 1A, the holding portion 14 includes a round bar-like columnar portion 20 and a rectangular plate-like flange portion 21 in which four corners of a substantially square shape are processed. A slightly small-diameter protruding fixing portion 20a is formed on the distal end side of the cylindrical portion 20, and a cylindrical mounting hole 22 having the same diameter as the proximal end mounting portion 11c of the guide rod 11 is formed in the protruding fixing portion 20a. . Here, the outer diameter of the protruding fixing portion 20 a is formed larger than the outer diameter of the main body portion 11 a of the guide rod 11. Further, the depth of the cylindrical mounting hole 22 is formed slightly deeper than the axial length of the proximal end side mounting portion 11 c of the guide rod 11. Therefore, in the state where the base end side mounting portion 11c of the guide rod 11 is press-fitted into the cylindrical mounting hole 22, the base end surface of the main body portion 11a of the guide rod and the tip end surface of the protruding fixing portion 20a are surely brought into contact with each other. .

フランジ部２１の板厚は、円柱部２０の突出固定部２０ａの軸方向長さと同程度に形成されている。また、フランジ部２１の中心位置には、突出固定部２０ａの外径と同一寸法の内径を有する丸孔２１ａが形成されている。そして、円柱部２０の突出固定部２０ａが、フランジ部２１の丸孔２１ａに圧入されて溶接されることで、円柱部２０とフランジ部２１とが一体化されている。 The plate thickness of the flange portion 21 is formed to be approximately the same as the axial length of the protruding fixing portion 20a of the cylindrical portion 20. In addition, a round hole 21 a having an inner diameter that is the same as the outer diameter of the protruding fixing portion 20 a is formed at the center position of the flange portion 21. And the cylindrical part 20 and the flange part 21 are integrated by press-fitting the welding fixing | fixed part 20a of the cylindrical part 20 in the round hole 21a of the flange part 21, and welding.

以上説明した案内棒１１、操作ウェイト１２、係止部１３、及び保持部１４は、例えば、以下のようにして組み立てられる。まず、案内棒１１の先端側取付部１１ｂを係止部１３の収容取付孔１６ａに圧入した後、案内棒１１と係止部１３とを溶接により一体化する。次に、案内棒１１に操作ウェイト１２を挿通し、突出固定部２０ａに形成された円柱取付孔２２に、案内棒１１の基端側取付部１１ｃを圧入した後、突出固定部２０ａと案内棒１１とを溶接により一体化する。 The guide rod 11, the operation weight 12, the locking part 13, and the holding part 14 described above are assembled as follows, for example. First, after the front end side attaching portion 11b of the guide rod 11 is press-fitted into the accommodation attaching hole 16a of the engaging portion 13, the guide rod 11 and the engaging portion 13 are integrated by welding. Next, the operation weight 12 is inserted into the guide rod 11, the proximal end side mounting portion 11c of the guide rod 11 is press-fitted into the columnar mounting hole 22 formed in the protruding fixing portion 20a, and then the protruding fixing portion 20a and the guide rod 11 are integrated by welding.

以上のようにして組み立てられた引抜治具１では、操作ウェイト１２が案内棒１１に遊嵌されているので、操作ウェイト１２は、案内棒１１の軸方向に沿って移動自在である。また、案内棒１１の両端部に固着された係止部１３とフランジ部２１とが、操作ウェイト１２のストッパとして作用して、操作ウェイト１２が案内棒１１から抜脱されることがない。 In the pulling jig 1 assembled as described above, since the operation weight 12 is loosely fitted to the guide rod 11, the operation weight 12 is movable along the axial direction of the guide rod 11. Further, the locking portion 13 and the flange portion 21 fixed to both ends of the guide rod 11 act as a stopper for the operation weight 12 so that the operation weight 12 is not pulled out of the guide rod 11.

図２は、上記実施例の引抜治具１によって、引き抜かれる連結ピンＰＮを示す図であり、（ａ）は連結ピンＰＮの正面図、（ｂ）は平面図、（ｃ）はＡ−Ａ断面図、（ｄ）はＢ−Ｂ断面図、（ｅ）は連結ピンＰＮの変形例を示す正面図である。 FIGS. 2A and 2B are views showing the connecting pin PN pulled out by the pulling jig 1 of the above embodiment, where FIG. 2A is a front view of the connecting pin PN, FIG. 2B is a plan view, and FIG. Sectional drawing, (d) is BB sectional drawing, (e) is a front view which shows the modification of connecting pin PN.

連結ピンＰＮは、略円柱状に形成されており、連結ピンＰＮの先端部は、切頭円錐状に形成されている。また、連結ピンＰＮの基端部には、径方向中心に予備孔ＨＯが特徴的に形成されている。予備孔ＨＯは、この実施例では単純な丸孔であるが、一旦木材に埋め込まれた連結ピンＰＮを何らかの理由で引く抜く場合には、この丸孔にネジ溝が事後的に形成される。そして、ネジ溝の切られた予備孔ＨＯに補助ネジ３０（図４）をねじ込むことで、補助ネジ３０と連結ピンＰＮとが一体化される。 The connecting pin PN is formed in a substantially cylindrical shape, and the tip end portion of the connecting pin PN is formed in a truncated cone shape. Further, a preliminary hole HO is characteristically formed at the center in the radial direction at the base end of the connecting pin PN. The preliminary hole HO is a simple round hole in this embodiment, but when the connecting pin PN embedded in the wood is pulled out for some reason, a thread groove is formed afterwards in the round hole. And the auxiliary screw 30 and the connection pin PN are integrated by screwing the auxiliary screw 30 (FIG. 4) into the preliminary hole HO where the thread groove is cut.

また、連結ピンＰＮの外周には、基端側の対称位置に隆起部２３，２３が設けられている。この隆起部２３は、連結ピンＰＮを、径方向両側（図の上下方向）から加圧することで形成される。なお、隆起部２３，２３は、木材に埋め込まれた連結ピンＰＮの回動を防止する部分であるが、隆起部２３に代えて、或いは、隆起部２３に加えて、連結ピンＰＮの基端側をやや大径にすると共に、ローレット加工を施して微細な凹凸模様を形成しても良い。図２（ｅ）は、隆起部に代えてローレット加工を施した連結ピンＰＮ’であり、連結ピンＰＮ’の軸方向中央から基端部にかけて、軸方向中央から先端部の径よりもやや大径に形成すると共に、その外周に網目状の凹凸模様が形成されている。 Further, on the outer periphery of the connecting pin PN, raised portions 23 are provided at symmetrical positions on the proximal end side. The raised portion 23 is formed by pressing the connecting pin PN from both sides in the radial direction (the vertical direction in the figure). In addition, although the protruding parts 23 and 23 are parts which prevent the rotation of the connecting pin PN embedded in the wood, the base end of the connecting pin PN is used instead of or in addition to the protruding part 23. The side may have a slightly larger diameter and may be knurled to form a fine uneven pattern. FIG. 2E shows a connecting pin PN ′ that has been knurled instead of the raised portion, and is slightly larger than the diameter of the distal end portion from the axial center to the proximal end portion of the connecting pin PN ′. In addition to being formed in a diameter, a mesh-like uneven pattern is formed on the outer periphery thereof.

図３は、柱２と梁３との接合構造を示す斜視図であり、図４は、梁３に挿入された連結ピンＰＮの引抜方法を示す斜視図である。 FIG. 3 is a perspective view showing a joint structure between the column 2 and the beam 3, and FIG. 4 is a perspective view showing a method of pulling out the connecting pin PN inserted into the beam 3.

図３に示すとおり、柱２と梁３とを接合する部材として接合金具４が使用される。この接合金具４は、金属製板体を略コ字状に折り曲げて形成されたものであり、基端部が柱２とボルト・ナットにより接合され、先端部４ａ、４ａが梁３と連結ピンＰＮにより接合される。接合金具４の基端部には、ボルト穴（不図示）が形成されており、接合金具４の先端部の上部及び下部には切欠き２４が形成され、両先端部の中央には３つのピン孔２５が形成されている。 As shown in FIG. 3, a joint fitting 4 is used as a member for joining the column 2 and the beam 3. The joint metal fitting 4 is formed by bending a metal plate into a substantially U shape, the base end part is joined to the column 2 by a bolt / nut, and the tip parts 4a and 4a are joined to the beam 3 and the connecting pin. Joined by PN. Bolt holes (not shown) are formed in the base end portion of the joint fitting 4, cutouts 24 are formed in the upper and lower portions of the distal end portion of the joint fitting 4, and three in the center of both distal end portions. A pin hole 25 is formed.

柱２には、接合金具４の基端部に対応した円柱溝２６が上下２つ形成されている。梁３の一端部には、上面から下面にかけて、接合金具４の先端部４ａ、４ａに対応した２本の切込み溝２７，２７が形成されている。梁３の側面には、接合金具４の切欠き２４に対応したピン孔２８、接合金具４のピン孔２５に対応したピン貫通穴２９，２９が切込み溝２７，２７を横切って形成されている。 The column 2 is formed with two upper and lower cylindrical grooves 26 corresponding to the base end portion of the joint fitting 4. At one end of the beam 3, two cut grooves 27, 27 corresponding to the end portions 4 a, 4 a of the joint fitting 4 are formed from the upper surface to the lower surface. A pin hole 28 corresponding to the notch 24 of the joint fitting 4 and pin through holes 29 and 29 corresponding to the pin hole 25 of the joint fitting 4 are formed across the cut grooves 27 and 27 on the side surface of the beam 3. .

柱２と梁３の接合は以下のようにして行われる。柱２の円柱溝２６に接合金具４の基端部を挿入して、接合金具４のボルト穴にボルト（不図示）を通し、柱２の反対側でナット（不図示）を締めることにより、柱２に接合金具４を固定する。次に、梁３のピン孔２８に、連結ピンＰＮをハンマー等で叩き込む。そして、梁３を接合金具４の上側から落とし込み、ピン孔２８に挿入された連結ピンＰＮが、接合金具の上部切欠き２４に引掛けられる。その後、梁３のピン貫通穴２９，２９を介して接合金具４のピン孔２５，２５に連結ピンＰＮを嵌挿して、接合金具４と梁３を固定することにより、柱２に梁３を接合する。 The column 2 and the beam 3 are joined as follows. By inserting the base end of the joint fitting 4 into the cylindrical groove 26 of the pillar 2, passing a bolt (not shown) through the bolt hole of the joint fitting 4, and tightening a nut (not shown) on the opposite side of the pillar 2, The joining bracket 4 is fixed to the column 2. Next, the connecting pin PN is struck into the pin hole 28 of the beam 3 with a hammer or the like. Then, the beam 3 is dropped from the upper side of the joint fitting 4 and the connecting pin PN inserted into the pin hole 28 is hooked on the upper notch 24 of the joint fitting. Thereafter, the connecting pin PN is inserted into the pin holes 25 and 25 of the joint fitting 4 through the pin through holes 29 and 29 of the beam 3 to fix the joint fitting 4 and the beam 3, so that the beam 3 is attached to the column 2. Join.

図４に示すとおり、作業完了状態では、梁３には連結ピンＰＮが３つ挿入されており、連結ピンＰＮの基端部が梁３の側面に表れている。このような完成状態において、その後、建物の建替えや改築などの要請から、柱２と梁３とを分離したい場合がある。かかる場合、連結ピンＰＮをその先端方向に叩き出すことができれば良いが、建物の構造上、連結ピンＰＮの先端方向に余分な空間がなく、叩き出し作業が不可能な場合もある。 As shown in FIG. 4, in the work completion state, three connection pins PN are inserted into the beam 3, and the base end portion of the connection pin PN appears on the side surface of the beam 3. In such a completed state, there is a case where the column 2 and the beam 3 are desired to be separated from a request for rebuilding or renovation of the building. In such a case, it is sufficient that the connecting pin PN can be knocked out in the direction of the tip, but there are cases where there is no extra space in the direction of the tip of the connecting pin PN due to the structure of the building, and the knocking-out operation may be impossible.

このような場合、この連結ピンＰＮの梁３から引抜きは、以下のようにして行われる。まず、この連結ピンＰＮの予備孔ＨＯの内周に、ネジ切り工具によってネジ溝を形成する。この時、連結ピンＰＮの隆起部２３，２３は係止片として働き、ネジ切り作業において、連結ピンＰＮが回動することを防止する。 In such a case, the connecting pin PN is extracted from the beam 3 as follows. First, a screw groove is formed by a thread cutting tool on the inner periphery of the preliminary hole HO of the connecting pin PN. At this time, the raised portions 23 and 23 of the connecting pin PN function as locking pieces, and prevent the connecting pin PN from rotating in the threading operation.

このようにしてネジ溝が形成されると、次にネジ溝を有する予備孔ＨＯに、補助ネジ３０をねじ込む。このねじ込み作業では、補助ネジ３０が完全にねじ込まれる手前で完了させる。すなわち、ねじ込み作業の完了状態では、連結ピンＰＮから補助ネジの頭部３１までの距離は、引抜治具１の作業部１８の板厚Ｈよりやや長く設定される。 When the thread groove is formed in this way, the auxiliary screw 30 is then screwed into the preliminary hole HO having the thread groove. This screwing operation is completed before the auxiliary screw 30 is completely screwed. That is, when the screwing operation is completed, the distance from the connecting pin PN to the auxiliary screw head 31 is set to be slightly longer than the plate thickness H of the working portion 18 of the extraction jig 1.

次に、引抜治具１の導入部１８ａを、補助ネジ３０の軸部３２に誘導し、最終的に、補助ネジの頭部３１を作業本体部１８ｂに保持させる。作業者は、この状態で、操作ウェイト１２と保持部１４を把持して、操作ウェイト１２を勢いよく何回もフランジ部２１に打ち付ける。そうすると、操作ウェイト１２が打ち付けられた方向、即ち、梁３から離れる方向に力が作用して、連結ピンＰＮが補助ネジ３０と共に、回動動作を伴うことなく直線的に引き抜かれることとなる。 Next, the introduction portion 18a of the extraction jig 1 is guided to the shaft portion 32 of the auxiliary screw 30, and finally the head portion 31 of the auxiliary screw is held by the work main body portion 18b. In this state, the operator grasps the operation weight 12 and the holding part 14 and strikes the operation weight 12 against the flange part 21 many times. Then, a force acts in a direction in which the operation weight 12 is struck, that is, a direction away from the beam 3, and the connecting pin PN is pulled out linearly together with the auxiliary screw 30 without being rotated.

以上の実施形態に基づき本発明を説明したが、本発明は、その趣旨を変更しない限り上述の実施形態に限定されるものではない。 Although the present invention has been described based on the above embodiment, the present invention is not limited to the above-described embodiment unless the gist thereof is changed.

また、引抜治具１は、図５に示す第２実施例の引抜治具１であってもよい。図５は、第２実施例に係る引抜治具１を示す図であり、図５（ａ）は、引抜治具１を図１（ｂ）のＢ−Ｂ線に沿って切断した中央断面図、図５（ｂ）は、図１（ａ）のＡ−Ａ方向に見た係止部１３の拡大正面図、図５（ｃ）は、係止部１３の斜視図である。 Further, the extraction jig 1 may be the extraction jig 1 of the second embodiment shown in FIG. FIG. 5 is a view showing the extraction jig 1 according to the second embodiment, and FIG. 5A is a central sectional view of the extraction jig 1 cut along the line BB in FIG. 1B. 5B is an enlarged front view of the locking portion 13 viewed in the AA direction of FIG. 1A, and FIG. 5C is a perspective view of the locking portion 13. FIG.

この図５に示す引抜治具１の操作ウェイト１２の把持部１２ａは、人間の指に対応した凹部が形成されず、円筒状となっている。このように把持部１２ａを形成することにより、簡易に操作ウェイト１２を製造することができる。また、操作ウェイト１２を一旦把持し、フランジ部２１に向かって操作ウェイト１２を投げ付けて、連結ピンＰＮを補助ネジ３０と共に引き抜く場合に有効である。 The gripping portion 12a of the operation weight 12 of the extraction jig 1 shown in FIG. 5 has a cylindrical shape without a recess corresponding to a human finger. By forming the grip portion 12a in this way, the operation weight 12 can be easily manufactured. Further, it is effective when the operation weight 12 is once gripped, the operation weight 12 is thrown toward the flange portion 21, and the connecting pin PN is pulled out together with the auxiliary screw 30.

また、引抜治具１の係止部１３は、略直方体状の基端部１６と、基端部１６から先端に向けて延びる延設部１７とに区分される。基端部１６には、案内棒１１の先端側取付部１１ｂが圧入される収容取付孔１６ａが、第１実施例の引抜治具１と同様に、貫通して形成されている。延設部１７の基端側は、略円弧状に形成され、先端側には、略Ｕ字状の開口溝が形成されている。また、延設部１７の肉厚Ｈは、基端部１６の厚さより薄く形成されている。延設部１７は、引抜作業用の補助ネジ３０（図４参照）を引掛ける部分として、補助ネジ３０の軸部３２を受け入れる導入部１８ａと、受け入れた補助ネジ３０の頭部３１を係止する作業本体部１８ｂとに区分されている（図５（ｂ）、（ｃ））。図示の通り、導入部１８ａは、補助ネジ３０の軸部３２を受け入れやすいよう、先端に向けて広がっている。また、作業本体部１８ｂは、補助ネジ３０の軸部３２よりやや大径で、補助ネジ３０の頭部３１より確実に小径の円弧形状を有している。 The locking portion 13 of the extraction jig 1 is divided into a substantially rectangular parallelepiped base end portion 16 and an extending portion 17 extending from the base end portion 16 toward the front end. In the base end portion 16, an accommodation mounting hole 16a into which the distal end side mounting portion 11b of the guide rod 11 is press-fitted is formed so as to penetrate therethrough as in the extraction jig 1 of the first embodiment. The base end side of the extending portion 17 is formed in a substantially arc shape, and a substantially U-shaped opening groove is formed on the distal end side. Further, the wall thickness H of the extended portion 17 is formed to be thinner than the thickness of the base end portion 16. The extending portion 17 locks the introduction portion 18a that receives the shaft portion 32 of the auxiliary screw 30 and the head portion 31 of the received auxiliary screw 30 as a portion to which the auxiliary screw 30 (see FIG. 4) for drawing work is hooked. Are divided into work main body portions 18b (FIGS. 5B and 5C). As shown in the drawing, the introduction portion 18a extends toward the tip so that the shaft portion 32 of the auxiliary screw 30 can be easily received. Further, the work main body portion 18 b has a slightly larger diameter than the shaft portion 32 of the auxiliary screw 30 and a small-diameter arc shape surely smaller than the head portion 31 of the auxiliary screw 30.

第２実施例の引抜治具１の係止部１３は、以上のように形成されているので、第１実施例のように側壁部１９を設ける必要がなく、より容易に係止部１３を製造することができる。 Since the locking portion 13 of the drawing jig 1 of the second embodiment is formed as described above, it is not necessary to provide the side wall portion 19 as in the first embodiment, and the locking portion 13 can be more easily attached. Can be manufactured.

本発明の実施形態に係る引抜治具を示す図面である。It is drawing which shows the extraction jig | tool which concerns on embodiment of this invention. 連結ピンＰＮを示す図面である。It is drawing which shows the connection pin PN. 柱と梁の接合構造を示す図面である。It is drawing which shows the junction structure of a column and a beam. 連結ピンＰＮの引抜方法を示す図面である。It is drawing which shows the extraction method of connecting pin PN. 引抜治具の変形例を示す図面である。It is drawing which shows the modification of a drawing jig | tool.

Explanation of symbols

１引抜治具
１１案内部材（案内棒）
１２操作ウェイト
１３係止部
２１フランジ部
３０補助具（補助ネジ）
ＰＮ連結ピン 1 Extraction jig 11 Guide member (guide rod)
12 Operation weight 13 Locking part 21 Flange part 30 Auxiliary tool (auxiliary screw)
PN connecting pin

Claims

An operation weight (12) that is linearly movable along the guide member (11), an engaging portion (13) fixed to one end of the guide member, and an operation fixed to the other end of the guide member. An extraction jig (1) having a flange portion (21) for receiving the movement of the weight;
An auxiliary screw (30) having a head portion (31) and a shaft portion (32) provided with a screw;
A pulling method for pulling out a connecting pin (PN) that is attached to a structural member of a wooden building and has a preliminary hole in the axial direction ,
A first step of providing a thread groove corresponding to the screw of the auxiliary screw in the spare hole of the connecting pin attached to the structural member of the wooden building using a threading tool;
The auxiliary screw and the connecting pin are integrated by screwing the auxiliary screw into the screw groove of the connecting pin so that a predetermined gap is formed between the head (31) of the auxiliary screw and the connecting pin (PN). Two steps,
A third step of locking the locking portion (13) of the extraction jig in the gap formed between the head (31) of the auxiliary screw and the connecting pin (PN);
By performing the fourth step of striking the operation weight (12) against the proximal end side of the extraction jig in the order in which the locking portion is locked,
A method of pulling out a connecting pin, wherein the connecting pin attached to the structural member of the wooden building is pulled out linearly afterwards.

The locking portion (13) is configured to have an extending portion (17) extending in a substantially U shape from the proximal end portion toward the distal end,
The extending portion (17) is divided into a working portion (18) provided at the bottom thereof and a side wall portion (19) rising vertically from both sides of the working portion (18). A substantially U-shaped opening groove is formed on the distal end side of the stop portion 13,
The drawing method according to claim 1, wherein in the third step, the working part (18) is inserted into a gap formed between the head of the auxiliary screw and the connecting pin.

The drawing method according to claim 1 or 2 , wherein a part of the connecting pin (PN) is provided with a large-diameter part that is larger in the radial direction than the other part.

The drawing method according to claim 3 , wherein the large-diameter portion is a pressure-deformed raised portion.

The drawing method according to claim 1 or 2 , wherein the large-diameter portion has a larger diameter on the proximal end side in the axial direction than the distal end side, and has a mesh-like unevenness formed thereon.