JP2018178451A - Connection structure, connection method and erecting method of steel support - Google Patents

Connection structure, connection method and erecting method of steel support Download PDF

Info

Publication number
JP2018178451A
JP2018178451A JP2017077181A JP2017077181A JP2018178451A JP 2018178451 A JP2018178451 A JP 2018178451A JP 2017077181 A JP2017077181 A JP 2017077181A JP 2017077181 A JP2017077181 A JP 2017077181A JP 2018178451 A JP2018178451 A JP 2018178451A
Authority
JP
Japan
Prior art keywords
joint plate
end joint
top end
locking member
female
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP2017077181A
Other languages
Japanese (ja)
Other versions
JP6374050B1 (en
Inventor
和彦 水谷
Kazuhiko Mizutani
和彦 水谷
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Maeda Corp
Original Assignee
Maeda Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Maeda Corp filed Critical Maeda Corp
Priority to JP2017077181A priority Critical patent/JP6374050B1/en
Application granted granted Critical
Publication of JP6374050B1 publication Critical patent/JP6374050B1/en
Publication of JP2018178451A publication Critical patent/JP2018178451A/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Abstract

PROBLEM TO BE SOLVED: To provide a technique relating to a steel support connection structure that can avoid manual work and improve safety and workability in tunnel face operation.SOLUTION: A steel support connection structure comprises: a first crown joint plate and a second crown joint plate, which are disposed at crown parts of a pair of steel supports that are split in arc shape and erected along a tunnel pit wall; a female connection part that is concave on the first crown joint plate; and a male connection part that is convex on the second crown joint plate. The male connection part has a rod-like male locking member that protrudes from the second crown joint plate. The female connection part has an opening hole, which penetrates the first crown joint plate, and a casing, which has internally a storage chamber with an insertion port that is communicated with the opening hole and allows the male locking member to be inserted, and locks the male locking member that is inserted into the storage chamber from the insertion port.SELECTED DRAWING: Figure 2

Description

本発明は、鋼製支保工の連結構造に関する。   The present invention relates to a connection structure of steel supports.

トンネルを構築する工法として、ＮＡＴＭ工法(New Austrian Tunneling Method)が知
られている。ＮＡＴＭ工法は、地山が有する支保能力、強度を有効に利用してトンネルの安定を保つという考え方のもとに、吹付けコンクリート、ロックボルト、鋼製支保工を適宜に用いて、地山と一体化したトンネル構造物を建設する工法である。 The New Austrian Tunneling Method is known as a method of constructing a tunnel. The NATM method appropriately uses the shotcrete, rock bolt, and steel support under the concept of maintaining the stability of the tunnel by effectively using the support capacity and strength possessed by the ground, using the ground support and the steel support as appropriate. It is a construction method to construct an integrated tunnel structure.

ＮＡＴＭ工法においてトンネルを構築する際に、アーチ状の鋼製支保工を設置する場合、通常、以下に説明する手順により行われている。まず、切羽の近傍に吹付け機をセットして、切羽にコンクリートを一次吹き付けし、これが完了すると、吹付け機を退出させる。次いで、切羽近傍に支保工を建て込むエレクタを備えた作業車を配置し、エレクタによりアーチ状の鋼製支保工を切羽近傍のトンネル坑壁に建て込み、これが完了すると作業車を退出させる。次に、切羽に吹付け機を再び配置し、建て込まれたトンネル支保工を埋め込むようにして、コンクリートの二次吹付けを行い、吹付け機を退出させる。   When constructing a tunnel in the NATM method, the installation of an arch-shaped steel support is usually performed according to the procedure described below. First, a sprayer is set near the face, and the face is sprayed primarily with concrete, and when this is complete, the sprayer is withdrawn. Next, a working vehicle provided with an elector for erecting a support near the face is arranged, and an arched steel support is erected by the erector on the tunnel pit wall near the face, and when this is completed, the working vehicle is withdrawn. Next, the sprayer is re-placed on the face, and the built-in tunnel support is embedded, and a secondary spray of concrete is performed to withdraw the sprayer.

鋼製支保工の建て込みに際しては、主にエレクタ装置やドリルジャンボ等といった重機のブーム先端で左右の鋼製支保工を把持して建て込み作業を行った後、左右の鋼製支保工の天端に設けられている継手板同士を突き合わせてボルト接合をすることでアーチ状に建て込む方法が一般的である。   When building a steel support, after holding the steel support left and right with the boom tip of a heavy machine such as an Electa device or a drill jumbo and carrying out the building work, the ceiling of the steel support left and right Generally, a method of erecting in an arch-like manner by butt-joining joint plates provided at the ends and bolting them together is common.

特許第３３８１６０６号公報Patent No. 3381606

しかしながら、従来の鋼製支保工の連結構造によれば、左右の鋼製支保工に設けられた継手板同士を当接させた状態で、トンネル坑壁付近に組まれた作業足場や重機のブームに設けられたマンケージ等に人員を配置して、トンネル天端付近まで人員を移動させ、その天端付近に位置する鋼製支保工の継手板同士にボルトを挿通し、かかるボルトをナットにて締結するといった連結作業を行う必要があった。   However, according to the connection structure of the conventional steel support, the boom of the work scaffolding and heavy machinery assembled near the tunnel pit wall in a state where the joint plates provided on the left and right steel supports are in contact with each other. Arrange the personnel in the mancage and so on provided in and move the personnel to the vicinity of the tunnel top end, insert the bolt into the joint plates of the steel support located near the top end and use the bolt with the nut It was necessary to carry out consolidation work such as fastening.

本発明は、上記のような問題点に鑑みてなされたものであって、その目的は、トンネルの切羽における人手作業を回避し、安全性および作業性を向上することができる鋼製支保工の連結構造に関する技術を提供することにある。   The present invention has been made in view of the problems as described above, and its object is to avoid the manual work on the face of the tunnel and to improve the safety and workability of the steel support construction. It is about providing the technology about connection structure.

本発明は、トンネル坑壁に沿って建て込まれる円弧状に分割された一対の鋼製支保工をそれぞれの天端部同士で相互に連結するための連結構造であって、前記一対の鋼製支保工の天端部にそれぞれ設けられ、当該一対の鋼製支保工が連結される際に互いに当接される第１天端継手板及び第２天端継手板と、前記第１天端継手板に凹設された雌型連結部と、前記第２天端継手板に凸設された雄型連結部と、を備え、前記雄型連結部は、前記第２天端継手板から突出する棒状の雄型係止部材を有し、前記雌型連結部は、前記第１天端継手板に貫通形成される開口孔と、前記開口孔と連通すると共に前記雄型係止部材を挿入可能な挿入口が開口形成される収納室を内部に有するケーシングと、を含み、前記挿入口から
前記収納室内へ挿入された前記雄型係止部材を係止する。 The present invention is a connecting structure for connecting a pair of arc-shaped divided steel supports erected along a tunnel pit wall to each other at their top ends, the pair of steels A first upper end joint plate and a second upper end joint plate provided respectively at the top end of the support and brought into contact with each other when the pair of steel supports are connected, and the first upper end joint A female connection portion recessed in a plate and a male connection portion protruding from the second top end joint plate are provided, and the male connection portion protrudes from the second top end joint plate A rod-shaped male locking member is provided, and the female connection portion communicates with the opening formed through the first top end joint plate and the opening, and the male locking member can be inserted. A casing having a storage chamber in which the insertion opening is formed, and the casing inserted into the storage chamber from the insertion opening To lock the mold locking member.

上記のように構成することで、トンネルの切羽における人手作業を回避し、安全性および作業性を向上することができる鋼製支保工の連結構造に関する技術を提供することができる。   By configuring as described above, it is possible to provide a technique related to the connection structure of steel supports that can avoid manual work at the face of a tunnel and improve safety and workability.

また、前記雌型連結部は、前記収納室に形成されると共に前方が縮径するテーパ面を有するテーパ穴と、前記テーパ穴内において周方向に複数に分割されて且つ前記テーパ面に沿って摺動可能に配置された楔状の雌型係止部材と、前記雌型係止部材の内面に複数並設された周方向の雌側係止溝と、前記雌型係止部材を前方に押圧する押圧部材と、を更に含み、前記雄型連結部は、前記雄型係止部材の外周に複数並設された周方向の雄側係止溝を更に含み、前記雄型係止部材が前記雌型連結部の前記挿入口から挿入される際には、前記雄型係止部材が前記押圧部材の押圧力に抗して前記雌型係止部材を前記テーパ面に沿って後退させることで当該雌型係止部材の内面を拡径しつつ前記雄型係止部材が前記収納室に挿入され、前記収納室への前記雄型係止部材の挿入が完了した際には、前記押圧部材の押圧力によって前記雌型係止部材が前記テーパ面に沿って前方へ押し戻されることで当該雌型係止部材の内面が縮径し、前記雌側係止溝及び前記雄側係止溝が相互に噛合することで、前記雄型連結部及び前記雌型連結部が一体に連結されても良い。   Further, the female connection portion is formed in the storage chamber and has a tapered surface having a tapered surface whose diameter is reduced in the front, and a plurality of circumferentially divided portions in the tapered hole and sliding along the tapered surface. A wedge-shaped female locking member disposed movably, a plurality of circumferential female locking grooves juxtaposed on the inner surface of the female locking member, and the female locking member pressed forward The male connection portion further includes a circumferential male locking groove provided in parallel on the outer periphery of the male locking member, and the male locking member is the female. When being inserted from the insertion port of the mold connection portion, the male locking member resists the pressing force of the pressing member to retract the female locking member along the tapered surface. The male locking member is inserted into the storage chamber while the diameter of the inner surface of the female locking member is expanded, and When the insertion of the mold locking member is completed, the inner surface of the female locking member is reduced in diameter by pushing back the female locking member along the tapered surface by the pressing force of the pressing member. The male connection portion and the female connection portion may be integrally connected by meshing the female locking groove and the male locking groove with each other.

また、前記第１天端継手板の外周縁には、前記一対の鋼製支保工を連結する際に、前記第２天端継手板をガイドして前記雌型連結部の前記挿入口に前記雄型係止部材を導くためのガイド部材が設けられていても良い。   Further, when connecting the pair of steel supports to the outer peripheral edge of the first top end joint plate, the second top end joint plate is guided to the insertion opening of the female connection portion. A guide member for guiding the male locking member may be provided.

また、前記ガイド部材は、前記第１天端継手板の外周縁の一部を覆うようにして設けられていても良い。   The guide member may be provided so as to cover a part of the outer peripheral edge of the first top end joint plate.

また、前記ガイド部材は、前記第１天端継手板の外周縁において角部を形成する２辺に設けられていても良い。   The guide members may be provided on two sides forming a corner on the outer peripheral edge of the first top end joint plate.

また、前記ガイド部材は、前記第１天端継手板の上縁に設けられた上方ガイド壁と、前記第１天端継手板のうち、前記一対の鋼製支保工の連結時において切羽に面する方の側縁に設けられた側方ガイド壁と、を有していても良い。   Further, the guide member has a face in the face when connecting the pair of steel supports among the upper guide wall provided on the upper edge of the first top end joint plate and the first top end joint plate. And a side guide wall provided at the side edge of the side.

また、本発明において、前記第１天端継手板が凹面形状を有していると共に、前記第２天端継手板が、前記第１天端継手板の凹面形状と相補的な凸面形状を有していることで、前記一対の鋼製支保工が連結される際に前記第１天端継手板及び前記第２天端継手板同士が面接触するように形成されており、前記一対の鋼製支保工を連結する際に、前記第１天端継手板の凹面に沿って前記雄型係止部材が摺動することで、当該凹面が前記雄型係止部材を前記雌型連結部の前記挿入口に導くためのガイドとして機能しても良い。   In the present invention, the first top end joint plate has a concave shape, and the second top end joint plate has a convex shape complementary to the concave shape of the first top end joint plate. The first top end joint plate and the second top end joint plate are formed to be in surface contact with each other when the pair of steel supports are connected. When the support is connected, the male locking member slides along the concave surface of the first top end joint plate, whereby the concave surface is the male locking member of the female connecting portion. You may function as a guide for leading to the said insertion port.

また、前記雌型連結部は、前記凹面形状を有する前記第１天端継手板の領域内において最も凹んでいる領域に配置されており、前記雄型係止部材は、前記凸面形状を有する前記第２天端継手板の領域内において最も隆起した領域に配置されていても良い。   Further, the female connection portion is disposed in the most recessed region in the region of the first top end joint plate having the concave shape, and the male locking member has the convex shape. It may be disposed in the most raised area in the area of the second top end joint plate.

また、前記開口孔は、第１天端継手板の厚さ方向における内面側から外面側にかけて拡径するテーパ面を有していても良い。   The opening may have a tapered surface whose diameter increases from the inner surface side to the outer surface side in the thickness direction of the first top end joint plate.

また、前記雄型係止部材の先端部には、先端に向かって縮径するテーパ面が形成されていても良い。   In addition, a tapered surface may be formed at the tip end of the male locking member so as to decrease in diameter toward the tip.

本発明によれば、トンネルの切羽における人手作業を回避し、安全性および作業性を向上することができる鋼製支保工の連結構造に関する技術を提供できる。   ADVANTAGE OF THE INVENTION According to this invention, the technique regarding the connection structure of steel supports which can avoid the manual work in the face of a tunnel, and can improve safety | security and workability can be provided.

図１は、実施形態１に係るトンネル支保工の側面図である。FIG. 1 is a side view of the tunnel support according to the first embodiment. 図２は、実施形態１に係る左側鋼製支保工及び右側鋼製支保工を連結する連結構造を示す概略図である。FIG. 2 is a schematic view showing a connection structure for connecting the left steel support and the right steel support according to the first embodiment. 図３は、実施形態１に係る第１天端継手板を示す図である。（ａ）に、第１天端継手板の外面側から眺めた雌型連結部を示す。（ｂ）に、第１天端継手板の内面側から眺めた雌型連結部を示す。FIG. 3 is a view showing a first top end joint plate according to the first embodiment. (A) shows a female connection viewed from the outer surface side of the first top end joint plate. The female type connection part seen from the inner surface side of the 1st top end joint board in (b) is shown. 図４は、実施形態１に係る第２天端継手板を示す図である。（ａ）に、第２天端継手板の内面側から眺めた雄型連結部を示す。（ｂ）に、第２天端継手板の外面側から眺めた雄型連結部を示す。FIG. 4 is a view showing a second top end joint plate according to the first embodiment. The male type connection part seen from the inner surface side of the 2nd top end joint board to (a) is shown. The male type connection part seen from the outer surface side of the 2nd top end joint board is shown in (b). 図５は、図２におけるＸ−Ｘ矢視断面図である。FIG. 5 is a cross-sectional view taken along the line XX in FIG. 図６は、エレクタ装置を搭載する作業車の上面図である。FIG. 6 is a top view of a working vehicle equipped with the elector device. 図７は、実施形態１に係る雌型連結部と雄型連結部を連結した状態を示す図である。FIG. 7 is a view showing a state in which the female connection portion and the male connection portion according to the first embodiment are connected. 図８は、実施形態１の変形例を説明する図である。FIG. 8 is a view for explaining a modification of the first embodiment. 図９は、実施形態２に係る鋼製支保工の連結構造を説明する図である。（ａ）は、左側鋼製支保工における第１天端継手板近傍の縦断面図である。（ｂ）は、（ａ）のＡ矢視正面図である。（ｃ）は、（ａ）のＢ−Ｂ矢視断面図である。FIG. 9 is a view for explaining the connection structure of steel supports according to the second embodiment. (A) is a longitudinal cross-sectional view of the 1st top end joint board vicinity in left steel support work. (B) is an A arrow front view of (a). (C) is a BB arrow sectional view of (a). 図１０は、実施形態２における左側鋼製支保工及び右側鋼製支保工を連結する際の動作を説明する図である。FIG. 10 is a view for explaining the operation at the time of connecting the left steel support and the right steel support in the second embodiment. 図１１Ａは、実施形態２の変形例に係るガイド部材を示す図である。FIG. 11A is a view showing a guide member according to a modification of the second embodiment. 図１１Ｂは、実施形態２の変形例に係るガイド部材を示す図である。FIG. 11B is a view showing a guide member according to a modification of the second embodiment. 図１２は、実施形態３に係る鋼製支保工の連結構造を説明する図である。（ａ）は、実施形態３に係る左側鋼製支保工における第１天端継手板近傍の縦断面図である。（ｂ）は、（ａ）のＣ矢視正面図である。（ｃ）は、実施形態３に係る第１天端継手板の概略斜視図である。FIG. 12 is a view for explaining the connection structure of steel supports according to the third embodiment. (A) is a longitudinal cross-sectional view of the 1st top end joint board vicinity in left steel support maintenance concerning a 3rd embodiment. (B) is a C arrow front view of (a). (C) is a schematic perspective view of the 1st top end joint board concerning Embodiment 3. FIG. 図１３は、実施形態３に係る鋼製支保工の連結構造を説明する図である。（ａ）は、実施形態３に係る右側鋼製支保工の第２天端継手板近傍の縦断面図である。（ｂ）は、（ａ）のＤ矢視正面図である。（ｃ）は、実施形態３に係る第２天端継手板の概略斜視図である。FIG. 13 is a view for explaining the connection structure of steel supports according to the third embodiment. (A) is a longitudinal cross-sectional view of the 2nd top end joint board vicinity of the right steel support maintenance concerning a 3rd embodiment. (B) is the D arrow front view of (a). (C) is a schematic perspective view of the 2nd top end joint board concerning Embodiment 3. FIG. 図１４は、実施形態３における左側鋼製支保工及び右側鋼製支保工を連結する際の動作を説明する図である。FIG. 14 is a view for explaining the operation at the time of connecting the left steel support and the right steel support in the third embodiment.

以下、本発明の実施形態について、図面を参照しながら説明する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings.

＜実施形態１＞
図１は、実施形態１に係るトンネル支保工１０の側面図である。トンネル支保工１０は、トンネル掘削に伴い露出する地山の崩落防止のために、掘削直後の坑壁に沿って建て込まれるアーチ状の鋼製支保工であり、トンネル軸方向に沿って一定間隔毎に設置される。本実施形態におけるトンネル支保工１０は、Ｈ形断面を有するＨ形鋼によって形成されている。より詳しくは、トンネル支保工１０は、一対の円弧状の鋼製支保工１０Ｌ，１０Ｒの天端部（上端部）同士を一体に連結することでアーチ状に形成されている。以下、鋼製支保工１０Ｌを「左側鋼製支保工」と呼び、鋼製支保工１０Ｒを「右側鋼製支保工」と呼ぶ。 First Embodiment
FIG. 1 is a side view of the tunnel support 10 according to the first embodiment. The tunnel support 10 is an arched steel support erected along a pit wall immediately after excavation for preventing collapse of the ground that is exposed during tunnel excavation, and has a fixed distance along the tunnel axial direction. It is installed every time. The tunnel support 10 in the present embodiment is formed of an H-shaped steel having an H-shaped cross section. More specifically, the tunnel support 10 is formed in an arch shape by integrally connecting the top ends (upper ends) of the pair of arc-shaped steel supports 10L and 10R. Hereinafter, the steel support 10L is referred to as "left side steel support", and the steel support 10R is referred to as "right side steel support".

左側鋼製支保工１０Ｌは、第１本体部１１１、第１天端継手板１２１、第１底板１３１を有する。第１本体部１１１は、ウェブ１１１ａ、当該ウェブ１１１ａに直交する一対の地山側フランジ１１１ｂ及び内空側フランジ１１１ｃから構成されるＨ形鋼である。また、第１本体部１１１における一端には第１天端継手板１２１が溶接され、他端には第１底板１３１が溶接されている。第１天端継手板１２１及び第１底板１３１は四角形の鋼製平板であり、第１本体部１１１のＨ形断面に対して直交方向に延在している。右側鋼製支保工１０Ｒについても同様に、第２本体部１１２、第２天端継手板１２２、第２底板１３２を有する。第２本体部１１２は、ウェブ１１２ａ、当該ウェブ１１２ａに直交する一対の地山側フランジ１１２ｂ及び内空側フランジ１１２ｃから構成されるＨ形鋼である。また、第２本体部１１２における一端には第２天端継手板１２２が溶接され、他端には第２底板１３２が溶接されている。第２天端継手板１２２、第２底板１３２は四角形の鋼製平板であり、第２本体部１１２のＨ形断面に対して直交方向に延在している。本実施形態では、第１天端継手板１２１及び第２天端継手板１２２は合同の正方形平面を有している。   The left steel support 10L includes a first main body 111, a first top end joint plate 121, and a first bottom plate 131. The first main body portion 111 is an H-shaped steel composed of a web 111a, a pair of land-side flanges 111b orthogonal to the web 111a, and an inner air-side flange 111c. Further, the first top end joint plate 121 is welded to one end of the first main body portion 111, and the first bottom plate 131 is welded to the other end. The first top end joint plate 121 and the first bottom plate 131 are square steel flat plates and extend in a direction orthogonal to the H-shaped cross section of the first main body 111. Similarly, the right steel support 10R has a second main body 112, a second top end joint plate 122, and a second bottom plate 132. The second main body portion 112 is an H-shaped steel composed of a web 112a, a pair of ground-side flanges 112b orthogonal to the web 112a, and an inner air-side flange 112c. Further, the second top end joint plate 122 is welded to one end of the second body portion 112, and the second bottom plate 132 is welded to the other end. The second top end joint plate 122 and the second bottom plate 132 are square steel flat plates and extend in a direction orthogonal to the H-shaped cross section of the second main body 112. In the present embodiment, the first top end joint plate 121 and the second top end joint plate 122 have a congruent square plane.

図１に示すように、左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒは、第１天端継手板１２１及び第２天端継手板１２２が互いに突き合わされた状態で連結されている。以下、左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒの連結構造について説明する。   As shown in FIG. 1, the left steel support 10L and the right steel support 10R are connected in a state where the first top end joint plate 121 and the second top end joint plate 122 abut each other. Hereinafter, the connection structure of the left side steel support 10L and the right side steel support 10R will be described.

図２は、実施形態１に係る左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒを連結する連結構造３０を示す概略図である。連結構造３０は、左側鋼製支保工１０Ｌの第１天端継手板１２１、右側鋼製支保工１０Ｒの第２天端継手板１２２、第１天端継手板１２１に凹設された雌型連結部４０、第２天端継手板１２２に凸設された雄型連結部５０等を含む。図２は、左側鋼製支保工１０Ｌにおける第１天端継手板１２１と右側鋼製支保工１０Ｒの第２天端継手板１２２が連結構造３０を介して連結される前の状態、即ち、第１天端継手板１２１と第２天端継手板１２２が離間した状態を示している。   FIG. 2 is a schematic view showing a connecting structure 30 connecting the left steel support 10L and the right steel support 10R according to the first embodiment. The connection structure 30 is a female connection that is recessed in the first top end joint plate 121 of the left steel support 10L, the second top end joint plate 122 of the right steel support 10R, and the first top end joint plate 121. The portion 40 includes a male connection portion 50 and the like provided on the second top end joint plate 122 in a convex manner. FIG. 2 shows a state before the first top end joint plate 121 in the left steel support 10L and the second top end plate 122 of the right steel support 10R are connected via the connecting structure 30, ie, The 1 top end joint board 121 and the 2nd top end joint board 122 show the state where they separated.

ここで、符号１２１ａは、第１天端継手板１２１の外面、符号１２１ｂは第１天端継手板１２Ｌの内面である。符号１２２ａは、第２天端継手板１２２の外面、符号１２２ｂは第２天端継手板１２２の内面である。図３（ａ）に、第１天端継手板１２１の外面１２１ａ側から眺めた雌型連結部４０を示し、図３（ｂ）に、第１天端継手板１２１の内面１２１ｂ側から眺めた雌型連結部４０を示す。また、図４（ａ）に第２天端継手板１２２の内面１２２ｂ側から眺めた雄型連結部５０を示し、図４（ｂ）に、第２天端継手板１２２の外面１２２ａ側から眺めた雌型連結部４０を示す。   Here, reference numeral 121 a is the outer surface of the first top end joint plate 121, and reference numeral 121 b is the inner surface of the first top end joint plate 12 L. Reference numeral 122 a is an outer surface of the second top end joint plate 122, and reference numeral 122 b is an inner surface of the second top end joint plate 122. 3A shows the female connection portion 40 viewed from the outer surface 121a side of the first top end joint plate 121, and FIG. 3B viewed from the inner surface 121b side of the first top end joint plate 121. The female connector 40 is shown. 4A shows the male connection portion 50 viewed from the inner surface 122b side of the second top end joint plate 122, and FIG. 4B is a view from the outer surface 122a side of the second top end joint plate 122. The female connector 40 is shown.

なお、符号１２１ｃは第１天端継手板１２１の上縁、符号１２１ｄは第１天端継手板１２１の下縁、符号１２１ｅは第１天端継手板１２１の左右の側縁である。また、符号１２２ｃは第２天端継手板１２２の上縁、符号１２２ｄは第２天端継手板１２２の下縁、符号１２２ｅは第２天端継手板１２２の左右の側縁である。図３に、第１天端継手板１２１の高さ方向及び幅方向を図示し、図４に、第２天端継手板１２２の高さ方向及び幅方向を図示する。第１天端継手板１２１の高さ方向は側縁１２１ｅの延伸方向と平行であり、且つ、第１本体部１１１が第１天端継手板１２１と連結する位置におけるウェブ１１１ａの延伸方向と平行である。また、第１天端継手板１２１の幅方向は上縁１２１ｃ及び下縁１２１ｄの延伸方向と平行であり、且つ、第１本体部１１１が第１天端継手板１２１と連結する位置における地山側フランジ１１１ｂ及び内空側フランジ１１１ｃの延伸方向と平行である。また、第２天端継手板１２２の高さ方向は側縁１２２ｅの延伸方向と平行であり、且つ、第２本体部１１２が第２天端継手板１２２と連結する位置におけるウェブ１１２ａの延伸方向と平行である。第２天端継手板１２２の幅方向は上縁１２２ｃ及び下縁１２２ｄの延伸方向と平行であり、且つ、第２本体部１１２が第２天端継手板１２２と連結する位置における地山側フランジ１１２ｂ及び内空側フランジ１１２ｃの延伸方向と平行である。   Reference numeral 121 c is the upper edge of the first top end joint plate 121, reference numeral 121 d is the lower edge of the first top end joint plate 121, and reference numeral 121 e is the left and right side edges of the first top end joint plate 121. Further, reference numeral 122 c is an upper edge of the second top end joint plate 122, reference numeral 122 d is a lower edge of the second top end joint plate 122, and reference numeral 122 e is a left and right side edge of the second top end joint plate 122. The height direction and the width direction of the first top end joint plate 121 are illustrated in FIG. 3, and the height direction and the width direction of the second top end joint plate 122 are illustrated in FIG. 4. The height direction of the first top end joint plate 121 is parallel to the extension direction of the side edge 121e, and is parallel to the extension direction of the web 111a at the position where the first main body portion 111 is connected to the first top end joint plate 121. It is. In addition, the width direction of the first top end joint plate 121 is parallel to the extension direction of the upper edge 121 c and the lower edge 121 d, and the ground side at a position where the first main body portion 111 is connected to the first top end joint plate 121 It is parallel to the extension direction of the flange 111b and the inner air side flange 111c. Further, the height direction of the second top end joint plate 122 is parallel to the extension direction of the side edge 122 e, and the extension direction of the web 112 a at the position where the second main body 112 is connected to the second top end joint plate 122 Parallel to The ground side flange 112 b at a position where the width direction of the second top end joint plate 122 is parallel to the extension direction of the upper edge 122 c and the lower edge 122 d, and the second main body 112 is connected to the second top end joint plate 122 And it is parallel to the extension direction of inner air side flange 112c.

図３（ａ）、（ｂ）に示すように、第１天端継手板１２１には、符号Ａ１で示される第１領域と、符号Ａ２で示される第２領域にそれぞれ雌型連結部４０が設けられている。第１領域Ａ１は、第１天端継手板１２１の平面領域のうち、第１本体部１１１のウェブ１１１ａを境に一方側に位置すると共に、地山側フランジ１１１ｂ、内空側フランジ１１１ｃ及びウェブ１１１ａによって囲まれた領域である。第２領域Ａ２は、第１天端継手板１２１における平面領域のうち、第１本体部１１１のウェブ１１１ａを境に他方側に位置すると共に、地山側フランジ１１１ｂ、内空側フランジ１１１ｃ及びウェブ１１１ａによって囲まれた領域である。同様に、図４（ａ）、（ｂ）に示すように、第２天端継手板１２２には、符号Ａ１で示される第１領域と、符号Ａ２で示される第２領域にそれぞれ雌型連結部４０が設けられている。第１領域Ａ１は、第２天端継手板１２２における平面領域のうち、第２本体部１１２のウェブ１１２ａを境にして一方側に位置すると共に、地山側フランジ１１２ｂ、内空側フランジ１１２ｃ及びウェブ１１２ａによって囲まれた領域である。第２領域Ａ２は、第２天端継手板１２２の平面領域のうち、第２本体部１１２のウェブ１１２ａを境にして他方側に位置すると共に、地山側フランジ１１２ｂ、内空側フランジ１１２ｃ及びウェブ１１２ａによって囲まれた領域である。   As shown in FIGS. 3 (a) and 3 (b), in the first top end joint plate 121, the female connection portion 40 is provided in the first area indicated by the reference numeral A1 and the second area indicated by the reference numeral A2. It is provided. The first area A1 is located on one side of the flat area of the first top end joint plate 121 with the web 111a of the first main body 111 as a boundary, and the ground side flange 111b, the inner air side flange 111c and the web 111a It is an area surrounded by The second area A2 is located on the other side of the first main end joint plate 121 with the web 111a of the first main body portion 111 as the boundary, and the ground side flange 111b, the inner air side flange 111c and the web 111a. It is an area surrounded by Similarly, as shown in FIGS. 4A and 4B, the second top end joint plate 122 is female-connected to the first region indicated by the reference numeral A1 and the second region indicated by the reference numeral A2. A unit 40 is provided. The first area A1 is located on one side of the flat area of the second top end joint plate 122 with the web 112a of the second main body 112 as a boundary, and the ground flange 112b, the inner air flange 112c and the web It is an area surrounded by 112a. The second area A2 is located on the other side of the planar area of the second top end joint plate 122 with the web 112a of the second main body 112 as a boundary, and the ground flange 112b, the inner air flange 112c and the web It is an area surrounded by 112a.

まず、第２天端継手板１２２に凸設された雄型連結部５０について説明する。第２天端継手板１２２には、雄型連結部５０が設けられる位置に一対の開口孔１２２ｆが穿設されている。雄型連結部５０は、棒状の雄型係止部材５１を有している。雄型係止部材５１は、第２天端継手板１２２の開口孔１２２ｆよりも若干小径の軸部材であり、その基端部に雄ネジ５１ａが刻設されている。また、雄型係止部材５１の中間部には環状の鍔部５１ｂが設けられている。また、雄型係止部材５１の鍔部５１ｂよりも先端側の部位における外周部には、雄ネジ５１ｃが形成されている。雄型係止部材５１の雄ネジ５１ｃは、雄型係止部材５１の外周に複数並設された周方向の雄側係止溝である。また、雄型係止部材５１の先端部５１ｄには、先端に向かって縮径するテーパ面５１ｅが形成されている。   First, the male connection portion 50 convexly provided on the second top end joint plate 122 will be described. A pair of opening holes 122 f is bored in the second top end joint plate 122 at a position where the male connection portion 50 is provided. The male connection portion 50 has a rod-shaped male locking member 51. The male locking member 51 is a shaft member slightly smaller in diameter than the opening hole 122f of the second top end joint plate 122, and a male screw 51a is cut at the base end thereof. Further, an annular collar 51 b is provided in the middle of the male locking member 51. Further, an external thread 51 c is formed on the outer peripheral portion at a portion on the tip end side of the flange portion 51 b of the male locking member 51. The male screw 51 c of the male locking member 51 is a circumferential male locking groove provided in parallel on the outer periphery of the male locking member 51. Further, a tapered surface 51e is formed at the tip end portion 51d of the male locking member 51 so as to decrease in diameter toward the tip end.

また、第２天端継手板１２２の外面１２２ａ側における開口孔１２２ｆの周囲には、周囲よりも一段凹んだザグリ部１２２ｇが形成されている。雄型係止部材５１の鍔部５１ｂは、第２天端継手板１２２の開口孔１２２ｆの径よりも大きい。雌型係止部材５１の基端側を、第２天端継手板１２２の外面１２２ａ側から開口孔１２２ｆに挿通し、鍔部５１ｂをザグリ部１２２ｇに配置した状態で基端部の雄ネジ５１ａにナット５２を螺着する。その結果、雄型係止部材５１が第２天端継手板１２２から突出した状態で、第２天端継手板１２２に雄型係止部材５１を固定することができる。   In addition, around the opening hole 122f on the outer surface 122a side of the second top end joint plate 122, a counterbore portion 122g which is recessed by one step from the periphery is formed. The collar 51 b of the male locking member 51 is larger than the diameter of the opening hole 122 f of the second top end joint plate 122. The base end side of the female locking member 51 is inserted into the opening hole 122f from the outer surface 122a side of the second top end joint plate 122, and the male screw 51a of the base end portion is disposed with the collar portion 51b arranged in the counterbore portion 122g. Screw in the nut 52 on the As a result, the male locking member 51 can be fixed to the second top end joint plate 122 in a state where the male locking member 51 protrudes from the second top end joint plate 122.

次に、雌型連結部４０について説明する。第１天端継手板１２１は、雌型連結部４０が設けられる位置に一対の開口孔１２１ｆが穿設されており、その内面１２１ｂには金属製の円筒状のケーシング４１が溶接ｗｐなどによって固定されている。ケーシング４１は、その軸心を開口孔１２１ｆの略中央部に位置させている。ケーシング４１内には、収納室４２が形成されている。収納室４２の先部（前部）には、その内周面を後端側から先端側にかけて内径が徐々に縮径するテーパ面４３ａを有するテーパ穴４３が形成されている。また、収納室４２の中間部にはバネ収納部４２ａが形成されており、収納室４２の後部内周に雌ネジ４５が刻設されている。また、テーパ穴４３の先端部には、挿入口４８が開口形成されている。ケーシング４１の前端部に位置する挿入口４８は、第１天端継手板１２１に形成された開口孔１２１ｆと略同径で、開口孔１２１ｆと連通している。また、ケーシング４１が第１天端継手板１２１に固定された状態で挿入口４８が開口孔１２１ｆと重なった位置に配置されている。   Next, the female connector 40 will be described. The first top end joint plate 121 is provided with a pair of opening holes 121f at a position where the female connection portion 40 is provided, and a metal cylindrical casing 41 is fixed to the inner surface 121b by welding wp or the like. It is done. The casing 41 has its axial center located substantially at the center of the opening hole 121f. In the casing 41, a storage chamber 42 is formed. A tapered hole 43 having a tapered surface 43a whose inner diameter gradually decreases from the rear end side to the front end side is formed at the tip portion (front portion) of the storage chamber 42. Further, a spring storage portion 42 a is formed in the middle portion of the storage chamber 42, and a female screw 45 is engraved on the rear inner periphery of the storage chamber 42. In addition, an insertion port 48 is formed at the tip of the tapered hole 43. The insertion port 48 located at the front end portion of the casing 41 communicates with the opening hole 121 f with substantially the same diameter as the opening hole 121 f formed in the first top end joint plate 121. Further, in a state where the casing 41 is fixed to the first top end joint plate 121, the insertion port 48 is disposed at a position overlapping the opening hole 121f.

また、テーパ穴４３内には、分割された雌型係止部材４６が軸方向に摺動可能に配置されている。本実施形態では、図５に示すように、周方向に３つに分割してなる楔形の雌型
係止部材４６が、ケーシング４１の軸（前後）方向に摺動可能に配設されている。ここで、雌型係止部材４６の外面は、テーパ穴４３におけるテーパ面４３ａに沿って摺動可能なテーパ面４６ａとして形成されている。雌型係止部材４６のテーパ面４６ａは、先端側から後方にかけて外径が徐々に拡大している。更に、各雌型係止部材４６の内面には、雌ネジ４６ｂが形成されている。雌ネジ４６ｂは、各雌型係止部材４６の内面に、複数並設された周方向の雌側係止溝である。雌ネジ４６ｂは、ケーシング４１の軸心を中心とする円弧で且つ、軸心に沿った方向に刻設されている。以上より、複数個の雌型係止部材４６によって雌ネジ穴が形成され、各雌型係止部材４６のテーパ面４６ａがテーパ穴４３のテーパ面４３ａに沿って後退することにより、その雌ネジ穴が拡径され、前方（先方）へ移動することにより当該雌ネジ穴が縮径するようになる。なお、各雌型係止部材４６の内面に形成された雌ネジ４６ｂは、雄型係止部材５１の先端側外周部に形成された雄ネジ５１ｃと噛合させることができる。 Further, in the tapered hole 43, the divided female locking member 46 is disposed slidably in the axial direction. In the present embodiment, as shown in FIG. 5, a wedge-shaped female locking member 46 divided into three in the circumferential direction is disposed slidably in the axial (front-rear) direction of the casing 41. . Here, the outer surface of the female locking member 46 is formed as a tapered surface 46 a which can slide along the tapered surface 43 a of the tapered hole 43. The tapered surface 46a of the female locking member 46 gradually increases in outer diameter from the tip end side to the rear. Further, on the inner surface of each female locking member 46, a female screw 46b is formed. The female screw 46 b is a plurality of circumferential female locking grooves provided in parallel on the inner surface of each female locking member 46. The female screw 46 b is a circular arc centered on the axial center of the casing 41 and is engraved in the direction along the axial center. As described above, a female screw hole is formed by the plurality of female locking members 46, and the tapered surface 46a of each female locking member 46 is retracted along the tapered surface 43a of the tapered hole 43, whereby the female screw is formed. The diameter of the hole is increased, and the female screw hole is reduced in diameter by moving forward (forward). The female screw 46 b formed on the inner surface of each female locking member 46 can be engaged with the male screw 51 c formed on the outer peripheral portion on the tip side of the male locking member 51.

また、収納室４２のバネ収納部４２ａには、雌型係止部材４６を前方（先方）に押圧（弾性付勢）する押圧部材である押圧ばね４４が、各雌型係止部材４６の後端に設けられるばね受け４７と蓋板４９との間に圧縮した状態で収納されており、押圧ばね４４の押圧力によって各雌型係止部材４６を常時前方に押圧している。蓋板４９は、収納室４２の後部内周側に刻設された雌ネジ４５に螺着されることで、押圧ばね４４を圧縮した状態に保持することができる。なお、蓋板４９の外面には、六角穴４９ａが設けられており、六角レンチによって蓋板４９をケーシング４１から着脱自在になっている。   Further, in the spring storage portion 42 a of the storage chamber 42, a pressing spring 44, which is a pressing member for pressing (elastically biasing) the female locking member 46 forward (forward), is disposed behind each female locking member 46. It is housed in a compressed state between a spring receiver 47 provided at an end and a cover plate 49, and the pressing force of the pressing spring 44 always presses the respective female locking members 46 forward. The cover plate 49 is screwed to the female screw 45 provided on the inner peripheral side of the rear portion of the storage chamber 42, whereby the pressure spring 44 can be held in a compressed state. A hexagonal hole 49a is provided on the outer surface of the cover plate 49, and the cover plate 49 can be attached to and detached from the casing 41 with a hexagonal wrench.

以上のように構成される雌型連結部４０及び雄型連結部５０において、各雌型係止部材４６の内面に形成された雌ネジ４６ｂと雄型係止部材５１の外周部に形成された雄ネジ５１ｃは、ネジピッチが、ＪＩＳに規定する細目ネジのピッチよりも小さく形成されている。また、本実施形態の雌型連結部４０では各雌型係止部材４６の内面に螺旋状の雌ネジ４６ｂを形成したが、雌ネジ４６ｂに代えて、各雌型係止部材４６の周方向に伸びる環状の山部と環状の谷部を交互かつ並行に配置した並行溝を各雌型係止部材４６の内面に設けても良い。同様に、雄型連結部５０においては、雄型係止部材５１の外周部に形成した雄ネジ５１ｃに代えて、雄型係止部材５１の周方向に伸びる環状の山部と環状の谷部を交互かつ並行に配置した並行溝を雄型係止部材５１の外周面に設けても良い。   In the female connector 40 and the male connector 50 configured as described above, the female screw 46 b formed on the inner surface of each female locking member 46 and the outer peripheral portion of the male locking member 51 are formed. The thread pitch of the male screw 51c is smaller than the pitch of the fine thread specified in JIS. Further, in the female connection portion 40 of the present embodiment, the spiral female screw 46b is formed on the inner surface of each female locking member 46, but instead of the female screw 46b, the circumferential direction of each female locking member 46 Parallel grooves may be provided on the inner surface of each female locking member 46 in which annular ridges and annular valleys extending alternately are arranged alternately and in parallel. Similarly, in the male connection portion 50, instead of the male screw 51c formed on the outer peripheral portion of the male locking member 51, an annular peak and annular valley extending in the circumferential direction of the male locking member 51 Parallel grooves may be provided on the outer peripheral surface of the male locking member 51.

次に、左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒを連結する際の連結構造３０の動作について説明する。なお、左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒの連結及び建て込み作業は、例えば、図６に示すようなエレクタ装置１００を用いて行うことができる。図６は、エレクタ装置１００を搭載する作業車２００の上面図である。エレクタ装置１００は、同一構成の一対のブーム１７Ｌ，１７Ｒを備えている。一対のブーム１７Ｌ，１７Ｒは、これらに付設される駆動機構の作動によって伸縮動作、傾動動作、揺動動作、回動動作が自在である。また、各ブーム１７Ｌ，１７Ｒの先端には、同一構成の一対のハンド１８Ｌ，１８Ｒが連結されている。一対のハンド１８Ｌ，１８Ｒは、これらに付設される駆動機構の作動によって回転動作および揺動動作が自在であり、左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒをそれぞれ着脱自在に挟圧把持（保持）することができる。エレクタ装置１００は、一対のハンド１８Ｌ，１８Ｒに左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒを把持し、各ハンド１８Ｌ，１８Ｒを駆動することで左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒを連結すると共に、所定の建て込み位置に建て込むことができる。   Next, the operation of the connecting structure 30 when connecting the left steel support 10L and the right steel support 10R will be described. The connection and erection work of the left steel support 10L and the right steel support 10R can be performed using, for example, an elector apparatus 100 as shown in FIG. FIG. 6 is a top view of the work vehicle 200 on which the elector device 100 is mounted. The elector apparatus 100 includes a pair of booms 17L and 17R having the same configuration. The pair of booms 17L and 17R can freely extend and retract, tilt, swing and turn by operation of a drive mechanism attached thereto. Further, a pair of hands 18L and 18R having the same configuration are connected to the tips of the booms 17L and 17R. The pair of hands 18L and 18R can freely rotate and swing by the operation of the drive mechanism attached to them, and can hold the left steel support 10L and the right steel support 10R in a detachable manner, respectively. It can be (held). The erector device 100 holds the left steel support 10L and the right steel support 10R on the pair of hands 18L and 18R and drives the hands 18L and 18R to support the left steel support 10L and the right steel support. The work 10R can be connected and erected at a predetermined erection position.

本実施形態に係る左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒの連結方法においては、エレクタ装置１００の各ハンド１８Ｌ，１８Ｒにそれぞれ左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒを把持する。そして、図２に示されるように、左側鋼製支保工１０Ｌにおける第１天端継手板１２１と右側鋼製支保工１０Ｒにおける第２天端継手板１２２
を接近かつ対峙（対向）させた状態から、第１天端継手板１２１の開口孔１２１ｆに雄型連結部５０（雄型係止部材５１）が挿入されるように、第１天端継手板１２１及び第２天端継手板１２２の離間距離を徐々に狭めてゆく。 In the method of connecting the left steel support 10L and the right steel support 10R according to the present embodiment, the left steel support 10L and the right steel support 10R are gripped by the hands 18L and 18R of the elector device 100, respectively. Do. And, as shown in FIG. 2, the first top end joint plate 121 in the left side steel support 10L and the second top end joint plate 122 in the right side steel support 10R.
So that the male connection portion 50 (male locking member 51) is inserted into the opening hole 121f of the first top end joint plate 121 from a state in which The separation distance between the second top end joint plate 122 and the second top end joint plate 122 is gradually narrowed.

ここで、雄型係止部材５１の外径は、第１天端継手板１２１の開口孔１２１ｆ及び雌型連結部４０（ケーシング４１）の挿入口４８よりも若干小径で、且つ、各雌型係止部材４６がテーパ穴４３（テーパ面４３ａ）の最前進位置に配置された状態で、各雌型係止部材４６によって形成される雌ネジ穴の直径よりも若干大径に設定されている。第２天端継手板１２２に凸設された雄型係止部材５１が第１天端継手板１２１の開口孔１２１ｆを通じて、雌型連結部４０の挿入口４８から侵入すると、押圧ばね４４の押圧力によって前端部にテーパ穴４３（テーパ面４３ａ）の最前進位置に位置決めされている各雌型係止部材４６の前端面４６ｃに雄型係止部材５１の頭部５１ｄが当接する。そして、雄型係止部材５１が押圧ばね４４の押圧力に抗して、各雌型係止部材４６をテーパ面４３ａに沿って、雌型連結部４０（ケーシング４１）の軸方向後方に向かって後退させることで、各雌型係止部材４６におけるテーパ面４６ａの雌ネジ４６ｂによって形成されている雌ネジ穴を拡径しつつ雄型係止部材５１が収納室４２内に挿入される。   Here, the outer diameter of the male locking member 51 is slightly smaller in diameter than the opening hole 121 f of the first top end joint plate 121 and the insertion port 48 of the female connecting portion 40 (the casing 41), and each female In the state where the locking member 46 is disposed at the most advanced position of the tapered hole 43 (the tapered surface 43a), the diameter is set to be slightly larger than the diameter of the female screw hole formed by each female locking member 46 . When the male locking member 51 convexly provided on the second top end joint plate 122 intrudes from the insertion port 48 of the female connection portion 40 through the opening hole 121 f of the first top end joint plate 121, the pressing spring 44 is pushed. The head 51d of the male locking member 51 abuts on the front end face 46c of each female locking member 46 positioned at the frontmost position of the tapered hole 43 (taper surface 43a) at the front end by pressure. Then, the male locking member 51 resists the pressing force of the pressing spring 44, and the respective female locking members 46 are directed rearward in the axial direction of the female connecting portion 40 (casing 41) along the tapered surface 43a. As a result, the male locking member 51 is inserted into the storage chamber 42 while the female screw hole formed by the female screw 46 b of the tapered surface 46 a of each female locking member 46 is expanded.

そして、第１天端継手板１２１の外面１２１ａと第２天端継手板１２２の外面１２２ａとが当接することで面接触し、雌型連結部４０における収納室４２内への雄型係止部材５１の挿入が完了することで、それ以上の収納室４２内への雄型係止部材５１の挿入が停止されると、各雌型係止部材４６は押圧ばね４４の押圧力によって前方（先方）に押し戻されると共に、各雌型係止部材４６のテーパ面４６ａによって形成される雌ネジ穴が縮径する。その結果、図７に示すように、雌型連結部４０における各雌型係止部材４６の雌ネジ４６ｂ（雌側係止溝）及び雄型連結部５０における雄型係止部材５１の雄ネジ５１ｃ（雄側係止溝）が相互に噛合する。これによって、図１に示したように、第１天端継手板１２１及び第２天端継手板１２２が面接触した状態で、左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒが一体に連結される。なお、本実施形態においては、雌型連結部４０に対して雄型係止部材５１が挿入及び係止された状態において、第１天端継手板１２１及び第２天端継手板１２２の各外縁同士の位置がすべて合致するように設定されている。すなわち、第１天端継手板１２１の雌型連結部４０と第２天端継手板１２２の雄型係止部材５１が連結された状態において、第１天端継手板１２１の上縁１２１ｃ、下縁１２１ｄ、一対の側縁１２１ｅがそれぞれ第２天端継手板１２２の上縁１２２ｃ、下縁１２２ｄ、一対の側縁１２２ｅに重なるようになっている。   Then, the outer surface 121a of the first top end joint plate 121 and the outer surface 122a of the second top end joint plate 122 are in contact with each other by surface contact, and the male locking member into the storage chamber 42 of the female connection portion 40 When the insertion of the male locking member 51 into the storage chamber 42 is stopped by the completion of the insertion of the 51, each female locking member 46 is moved forward by the pressing force of the pressing spring 44. ) And the diameter of the female screw hole formed by the tapered surface 46a of each female locking member 46 is reduced. As a result, as shown in FIG. 7, the female screw 46 b (female locking groove) of each female locking member 46 in the female connection portion 40 and the male screw of the male locking member 51 in the male connection portion 50. 51c (male locking groove) mesh with each other. Thus, as shown in FIG. 1, the left steel support 10L and the right steel support 10R are integrally connected while the first top end joint plate 121 and the second top end joint plate 122 are in surface contact with each other. Be done. In the present embodiment, the outer edges of the first top end joint plate 121 and the second top end joint plate 122 in a state where the male locking member 51 is inserted and locked in the female connection portion 40. All the positions of each other are set to match. That is, in a state in which the female connection portion 40 of the first top end joint plate 121 and the male locking member 51 of the second top end joint plate 122 are connected, the upper edge 121 c of the first top end joint plate 121 and the lower edge The edge 121d and the pair of side edges 121e overlap the upper edge 122c, the lower edge 122d and the pair of side edges 122e of the second top end joint plate 122, respectively.

ここで、図７に示したように、雌型連結部４０の雌ネジ４６ｂと雄型連結部５０（雄型係止部材５１）の雄ネジ５１ｃが噛合した状態で、第１天端継手板１２１及び第２天端継手板１２２を離反する方向に外力が作用した場合、雌型連結部４０における収納室４２から雄型係止部材５１を引き抜く方向に引き抜き力が作用する。この引き抜き力は、互いに噛み合う雄ネジ５１ｃと雌ネジ４６ｂを介して各雌型係止部材４６に伝達される。ところで、各雌型係止部材４６のテーパ面４６ａは後方側から前方にかけて外径が徐々に縮小している。そのため、上記引き抜き力が各雌型係止部材４６に作用しても、各雌型係止部材４６がテーパ穴４３の前方に向かって変位することが制限される。すなわち、本実施形態に係る連結構造３０によれば、雌型連結部４０の収納室４２から雄型係止部材５１を引き抜く方向に外力が作用しても、当該外力に対抗して連結状態を維持することができる。   Here, as shown in FIG. 7, the first top end joint plate is engaged with the female screw 46b of the female connector 40 and the male screw 51c of the male connector 50 (male locking member 51). When an external force acts in a direction to separate 121 and the second top end joint plate 122, a pulling force acts in the direction in which the male locking member 51 is pulled out from the storage chamber 42 in the female connection portion 40. The pullout force is transmitted to the respective female locking members 46 via the male screw 51c and the female screw 46b which are engaged with each other. The outer diameter of the tapered surface 46a of each female locking member 46 gradually decreases from the rear side to the front side. Therefore, even if the extraction force acts on each female locking member 46, the displacement of each female locking member 46 toward the front of the tapered hole 43 is limited. That is, according to the connection structure 30 according to the present embodiment, even when an external force acts in the direction in which the male locking member 51 is pulled out from the storage chamber 42 of the female connection portion 40, the connection state is countered against the external force. Can be maintained.

また、本実施形態における連結構造３０によれば、雌型連結部４０の挿入口４８から雄型連結部５０（雄型係止部材５１）を挿入する動作だけで、雌型連結部４０に対して雄型連結部５０が連結され、左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒを一体に締結することができる。つまり、本実施形態における鋼製支保工の連結構造３０によれば、従来のように、トンネル坑壁付近に組まれた作業足場やエレクタ装置のマンケージ等に人員を
配置してトンネル天端付近まで人員を移動させ、一対の鋼製支保工の天端に位置する継手板同士をボルト締結するといった連結作業を行う必要がない。従って、本実施形態における鋼製支保工の連結構造３０によれば、従来に比べて、より短時間で簡単に、左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒの連結作業を行うことができる。また、本実施形態における鋼製支保工の連結構造３０によれば、エレクタ装置１００における一対のブーム１７Ｌ，１７Ｒの先端に取り付けられたハンド１８Ｌ，１８Ｒの操作によって、左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒを連結することができるため、トンネルの切羽における人手作業を回避することができ、従来に比してより一層安全性及び作業性を向上することができる。 Further, according to the connecting structure 30 in the present embodiment, the male connecting portion 50 (male locking member 51) is only inserted from the insertion port 48 of the female connecting portion 40 with respect to the female connecting portion 40. The male connector 50 is connected, and the left steel support 10L and the right steel support 10R can be fastened together. That is, according to the connection structure 30 of the steel support in the present embodiment, as in the prior art, personnel are arranged on the work scaffolding assembled in the vicinity of the tunnel pit wall, the mancage of the elector device, etc. There is no need to move the personnel and carry out a connecting operation such as bolting the joint plates located at the top ends of the pair of steel supports. Therefore, according to the connection structure 30 of the steel support in the present embodiment, the connection work of the left steel support 10L and the right steel support 10R can be easily performed in a shorter time than in the related art. it can. Further, according to the connection structure 30 of the steel support in the present embodiment, the left steel support 10L and the right side are operated by operating the hands 18L and 18R attached to the tips of the pair of booms 17L and 17R in the elector device 100. Since the steel supports 10R can be connected, manual labor at the face of the tunnel can be avoided, and safety and workability can be further improved compared to the prior art.

また、本実施形態においては、雄型係止部材５１の先端部５１ｄに、先端に向かって縮径するテーパ面５１ｅが形成されているため、左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒ（雌型連結部４０及び雄型連結部５０）を連結する際に、雌型連結部４０の挿入口４８と雄型係止部材５１の中心位置が相対的に多少ずれていたとしても、第１天端継手板１２１の開口孔１２１ｆの縁部に沿って雄型係止部材５１のテーパ面５１ｅを摺動させることで、雌型連結部４０における挿入口４８と雄型係止部材５１の中心同士の位置ずれ量が減少する方向に雄型係止部材５１をガイドすることができる。つまり、雄型係止部材５１の先端部５１ｄにテーパ面５１ｅを設けることによって、左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒ（雌型連結部４０及び雄型連結部５０）を連結する際に雌型連結部４０の挿入口４８と雄型係止部材５１の平面位置が多少ずれていても、雄型係止部材５１を雌型連結部４０の挿入口４８へと円滑に導くことができる。なお、雄型係止部材５１の先端部５１ｄに形成するテーパ面５１ｅのディテールは適宜変更できる。例えば、雄型係止部材５１の先端部５１ｄを円錐形状として形成しても良い。この場合、当該円錐形状の側面がテーパ面５１ｅとして形成される。   Further, in the present embodiment, since the tapered surface 51e which is reduced in diameter toward the tip is formed at the tip 51d of the male locking member 51, the left steel support 10L and the right steel support 10R are formed. When connecting the female connecting portion 40 and the male connecting portion 50, even if the central position of the insertion port 48 of the female connecting portion 40 and the center position of the male locking member 51 are somewhat shifted, (1) By sliding the tapered surface 51e of the male locking member 51 along the edge of the opening hole 121f of the top end joint plate 121, the insertion port 48 and the male locking member 51 in the female connecting portion 40 The male locking member 51 can be guided in the direction in which the amount of positional deviation between the centers decreases. That is, the left steel support 10L and the right steel support 10R (the female connecting portion 40 and the male connecting portion 50) are connected by providing the tapered surface 51e at the front end 51d of the male locking member 51. Even when the insertion port 48 of the female connection portion 40 and the planar position of the male locking member 51 are slightly shifted, the male locking member 51 is smoothly guided to the insertion port 48 of the female connection portion 40. Can. The detail of the tapered surface 51e formed on the end portion 51d of the male locking member 51 can be changed as appropriate. For example, the tip end portion 51d of the male locking member 51 may be formed in a conical shape. In this case, the conical side surface is formed as a tapered surface 51e.

＜実施形態１の変形例＞
図８は、実施形態１の変形例を説明する図である。本変形例に係る１天端継手板１２１に形成された開口孔１２１ｆは、第１天端継手板１２１の厚さ方向における内面１２１ｂから外面１２２ａにかけて拡径するテーパ面１２１５を有している。このように、１天端継手板１２１の開口孔１２１ｆを形成することで、左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒ（雌型連結部４０及び雄型連結部５０）を連結する際に、雌型連結部４０の挿入口４８と雄型係止部材５１の中心位置が相対的に多少ずれていたとしても、第１天端継手板１２１の開口孔１２１ｆにおけるテーパ面１２１５を雄型係止部材５１が摺動することで、雌型連結部４０における挿入口４８と雄型係止部材５１の中心同士の位置ずれ量が小さくなる方向に雄型係止部材５１をガイドすることができる。これによれば、雄型係止部材５１を雌型連結部４０の挿入口４８へと円滑に導くことができる。 <Modification of Embodiment 1>
FIG. 8 is a view for explaining a modification of the first embodiment. The opening hole 121 f formed in the one top end joint plate 121 according to the present modification has a tapered surface 1215 that increases in diameter from the inner surface 121 b to the outer surface 122 a in the thickness direction of the first top end joint plate 121. In this manner, by forming the opening hole 121f of the one top end joint plate 121, the left steel support 10L and the right steel support 10R (female connection portion 40 and male connection portion 50) are connected. Even if the center position of the insertion port 48 of the female connecting portion 40 and the center position of the male locking member 51 are shifted relatively to some extent, the tapered surface 1215 in the opening hole 121f of the first top end joint plate 121 is male As the locking member 51 slides, the male locking member 51 can be guided in the direction in which the amount of positional deviation between the center of the insertion port 48 and the male locking member 51 in the female connection portion 40 becomes smaller. it can. According to this, the male locking member 51 can be smoothly guided to the insertion port 48 of the female connection portion 40.

＜実施形態２＞
次に、本発明の実施形態２について説明する。図９は、実施形態２に係る鋼製支保工の連結構造を説明する図である。図９には、左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒのうち、雌型連結部４０が設けられる左側鋼製支保工１０Ｌの第１天端継手板１２１及びその周辺構造を示している。図９（ａ）は、左側鋼製支保工１０Ｌにおける第１天端継手板１２１近傍の縦断面図である。図９（ｂ）は、図９（ａ）のＡ矢視正面図である。図９（ｃ）は、図９（ａ）のＢ−Ｂ矢視断面図である。なお、図９には図示していないが、本実施形態における右側鋼製支保工１０Ｒは、実施形態１と同一構造である。また、第１天端継手板１２１に凹設される雌型連結部４０及び第２天端継手板１２２に凸設される雄型連結部５０（雄型係止部材５１）についても、実施形態１と同一構造である。 Second Embodiment
Next, a second embodiment of the present invention will be described. FIG. 9 is a view for explaining the connection structure of steel supports according to the second embodiment. FIG. 9 shows the first top end joint plate 121 of the left steel support 10L on which the female connecting portion 40 is provided among the left steel support 10L and the right steel support 10R and the peripheral structure thereof There is. FIG. 9A is a longitudinal cross-sectional view of the vicinity of the first top end joint plate 121 in the left steel support 10L. Fig. 9 (b) is a front view as viewed from the arrow A in Fig. 9 (a). FIG.9 (c) is a BB arrow sectional drawing of Fig.9 (a). Although not shown in FIG. 9, the right steel support 10R in the present embodiment has the same structure as that of the first embodiment. Further, the embodiment is also applicable to the female connection portion 40 recessed in the first top end joint plate 121 and the male connection portion 50 (male type locking member 51) protruding in the second top end joint plate 122. It has the same structure as 1.

図９（ａ）乃至（ｃ）に示すように、実施形態２に係る第１天端継手板１２１の外周縁にはガイド部材７０が設けられている。ガイド部材７０は、全体で概略ラッパ形状を呈し
、第１天端継手板１２１の外周縁を覆うようにして設けられている。ガイド部材７０は、平板状の鋼板によってそれぞれ形成された上方ガイド壁７１、下方ガイド壁７２、及び一対の側方ガイド壁７３を有する。図示のように、上方ガイド壁７１は、第１天端継手板１２１の上縁１２１ｃから第１天端継手板１２１に対して垂直方向に延設されている。一方、下方ガイド壁７２は第１天端継手板１２１の下縁１２１ｄから第１天端継手板１２１に対して斜め方向に延設され、一対の側方ガイド壁７３は第１天端継手板１２１の側縁１２１ｅから第１天端継手板１２１に対して斜め方向に延設されている。 As shown in FIGS. 9A to 9C, a guide member 70 is provided on the outer peripheral edge of the first top end joint plate 121 according to the second embodiment. The guide member 70 has a generally trumpet shape as a whole, and is provided so as to cover the outer peripheral edge of the first top end joint plate 121. The guide member 70 has an upper guide wall 71, a lower guide wall 72, and a pair of side guide walls 73 which are respectively formed of flat steel plates. As illustrated, the upper guide wall 71 extends in the vertical direction with respect to the first top end joint plate 121 from the upper edge 121 c of the first top end joint plate 121. On the other hand, the lower guide wall 72 extends obliquely from the lower edge 121d of the first top end joint plate 121 to the first top end joint plate 121, and the pair of side guide walls 73 is the first top end joint plate It is extended in a diagonal direction with respect to the first top end joint plate 121 from the side edge 121 e of 121.

次に、実施形態２における左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒを連結する際の動作について説明する。図１０は、実施形態２における左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒを連結する際の動作を説明する図である。本実施形態において、左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒ（雌型連結部４０及び雄型連結部５０）を連結する際に、ガイド部材７０が第２天端継手板１２２をガイドして雌型連結部４０の挿入口４８に雄型連結部５０の雄型係止部材５１を導く。本実施形態における連結構造３０は、左側鋼製支保工１０Ｌの第１天端継手板１２１、右側鋼製支保工１０Ｒの第２天端継手板１２２、第１天端継手板１２１に凹設された雌型連結部４０、第２天端継手板１２２に凸設された雄型連結部５０、ガイド部材７０を含む。   Next, the operation at the time of connecting the left steel support 10L and the right steel support 10R in the second embodiment will be described. FIG. 10 is a view for explaining an operation when connecting the left steel support 10L and the right steel support 10R in the second embodiment. In the present embodiment, when the left steel support 10L and the right steel support 10R (the female connection portion 40 and the male connection portion 50) are connected, the guide member 70 guides the second top end joint plate 122. Then, the male locking member 51 of the male coupling portion 50 is guided to the insertion port 48 of the female coupling portion 40. The connection structure 30 in the present embodiment is recessed in the first top end joint plate 121 of the left steel support 10L, the second top end joint plate 122 of the right steel support 10R, and the first top end joint plate 121. It includes a female connection portion 40, a male connection portion 50 convexly provided on the second top end joint plate 122, and a guide member 70.

図１０に示す例では、右側鋼製支保工１０Ｒの第２天端継手板１２２における下縁１２２ｄがガイド部材７０の下方ガイド壁７２に当接し、当該下方ガイド壁７２の表面を摺動することによって、雌型連結部４０における挿入口４８（第１天端継手板１２１の開口孔１２１ｆ）と雄型連結部５０における雄型係止部材５１の中心同士の高さ方向のずれ量が徐々に減少する。また、本実施形態では、第２天端継手板１２２の上縁１２２ｃが、ガイド部材７０における上方ガイド壁７１に当接した状態で、雌型連結部４０における挿入口４８と雄型係止部材５１の中心同士の高さ方向のずれ量が零となるように設定されている。また、図１０に図示していないが、左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒを相対的に接近させていく過程で、右側鋼製支保工１０Ｒにおける第２天端継手板１２２の側縁１２２ｅがガイド部材７０の側方ガイド壁７３の表面に沿って摺動することで、雌型連結部４０における挿入口４８（第１天端継手板１２１の開口孔１２１ｆ）と雄型連結部５０における雄型係止部材５１の中心同士の幅方向のずれ量が徐々に減少する。   In the example shown in FIG. 10, the lower edge 122d of the second top end joint plate 122 of the right steel support 10R abuts on the lower guide wall 72 of the guide member 70 and slides on the surface of the lower guide wall 72. Thus, in the female connecting portion 40, the amount of shift between the centers of the male locking members 51 in the height direction between the insertion port 48 (the opening 121f of the first top end joint plate 121) in the female connecting portion Decrease. Further, in the present embodiment, with the upper edge 122c of the second top end joint plate 122 in contact with the upper guide wall 71 of the guide member 70, the insertion port 48 and the male locking member in the female coupling portion 40 The shift amount in the height direction between the centers 51 is set to be zero. Further, although not shown in FIG. 10, in the process of relatively bringing the left steel support 10L and the right steel support 10R relatively close, the second top end joint plate 122 of the right steel support 10R is The side edge 122e slides along the surface of the side guide wall 73 of the guide member 70, whereby the insertion port 48 (the opening hole 121f of the first top end joint plate 121) and the male connection are formed in the female connection portion 40. The amount of shift in the width direction between the centers of the male locking members 51 in the portion 50 gradually decreases.

以上のように、本実施形態におけるガイド部材７０は、ガイド部材７０の先端側から基端側（第１天端継手板１２１との接続端）にかけてガイド部材７０によって囲まれた有効面積が徐々に絞られている。そのため、左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒの連結時に第１天端継手板１２１及び第２天端継手板１２２を徐々に接近させることにより、第１天端継手板１２１の外周縁に設けられたガイド部材７０が第２天端継手板１２２をガイドする。これにより、雌型連結部４０における挿入口４８と雄型係止部材５１の中心同士が位置合わせされる。つまり、雄型係止部材５１を雌型連結部４０の挿入口４８（第１天端継手板１２１の開口孔１２１ｆ）に導くことができる。そして、雌型連結部４０の挿入口４８から雄型係止部材５１が挿入されることで、左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒの連結が完了する。   As described above, in the guide member 70 in the present embodiment, the effective area surrounded by the guide member 70 gradually extends from the distal end side to the proximal end side (connection end with the first top end joint plate 121) of the guide member 70. It is squeezed. Therefore, by gradually bringing the first top end joint plate 121 and the second top end joint plate 122 closer to each other when the left steel support 10L and the right steel support 10R are connected, the outside of the first top end joint plate 121 is obtained. Guide members 70 provided at the periphery guide the second top end joint plate 122. Thereby, the centers of the insertion port 48 and the male locking member 51 in the female connection portion 40 are aligned. That is, the male locking member 51 can be guided to the insertion port 48 of the female connection portion 40 (the opening hole 121 f of the first top end joint plate 121). Then, the male locking member 51 is inserted from the insertion port 48 of the female connecting portion 40, thereby completing the connection of the left steel support 10L and the right steel support 10R.

また、本実施形態におけるガイド部材７０は、上方ガイド壁７１が第１天端継手板１２１の上縁１２１ｃから第１天端継手板１２１に対して垂直方向に延設されている。その結果、ガイド部材７０における上方ガイド壁７１が、第１天端継手板１２１の上縁１２１ｃから外方に大きくはみ出すことがない。これによれば、左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒの連結作業時において、ガイド部材７０の上方ガイド壁７１が、トンネル坑壁の天端部に干渉（衝突）し難くすることができる。但し、ガイド部材７０は、上記形状に特段限られず、左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒの連結時に、雌型連結部４０における挿入口４８の位置に雄型係止部材５１が接近するようにガイドすること
ができれば、種々の形状を採用することができる。例えば、上述したガイド部材７０はラッパ形状を有し、基端側から先端側にかけて広がった形状を採用していたが、これには限られない。また、ガイド部材７０は、第１天端継手板１２１の外周縁における一部に設けられていても良い。 Further, in the guide member 70 in the present embodiment, the upper guide wall 71 is extended from the upper edge 121 c of the first top end joint plate 121 in the vertical direction with respect to the first top end joint plate 121. As a result, the upper guide wall 71 in the guide member 70 does not protrude largely outward from the upper edge 121 c of the first top end joint plate 121. According to this, during the connection work of the left steel support 10L and the right steel support 10R, the upper guide wall 71 of the guide member 70 does not easily interfere (collide) with the top end of the tunnel pit wall. Can. However, the guide member 70 is not particularly limited to the above shape, and the male locking member 51 is located at the position of the insertion port 48 in the female connecting portion 40 when the left steel support 10L and the right steel support 10R are connected. If it can be guided to approach, various shapes can be adopted. For example, although the guide member 70 mentioned above has a trumpet shape and employ | adopted the shape which spread from the proximal end side to the front end side, it is not restricted to this. Further, the guide member 70 may be provided on a part of the outer peripheral edge of the first top end joint plate 121.

＜実施形態２の変形例＞
ここで、図１１Ａ及び図１１Ｂは、実施形態２の変形例に係るガイド部材を示す図である。図１１Ａに示すガイド部材７０Ａは、第１天端継手板１２１の外周縁の４辺（４面）から第１天端継手板１２１に対して垂直に突設された上方ガイド壁７１Ａ、下方ガイド壁７２Ａ、及び一対の側方ガイド壁７３Ａを有している。ここで、ガイド部材７０Ａの上方ガイド壁７１Ａは第１天端継手板１２１の上縁１２１ｃの中央部に立設し、下方ガイド壁７２Ａは第１天端継手板１２１の下縁１２１ｄの中央部に立設し、一対の側方ガイド壁７３Ａは第１天端継手板１２１の各側縁１２１ｅの中央部に立設している。図１１Ａに示す例では、上方ガイド壁７１Ａ、下方ガイド壁７２Ａ、及び側方ガイド壁７３Ａの幅寸法が、第１天端継手板１２１の上縁１２１ｃ、下縁１２１ｄ、及び側縁１２１ｅにおける各辺の長さに比べて小さく設定されており、ガイド部材７０Ａにおける上方ガイド壁７１Ａと側方ガイド壁７３Ａとの間、下方ガイド壁７２Ａと側方ガイド壁７３Ａとの間には、それぞれ隙間Ｇが形成されている。 <Modification of Embodiment 2>
Here, FIGS. 11A and 11B are diagrams showing a guide member according to a modification of the second embodiment. A guide member 70A shown in FIG. 11A is an upper guide wall 71A vertically projecting from the four sides (four sides) of the outer peripheral edge of the first top end joint plate 121 to the first top end joint plate 121, a lower guide It has a wall 72A and a pair of side guide walls 73A. Here, the upper guide wall 71A of the guide member 70A is erected at the central portion of the upper edge 121c of the first upper end joint plate 121, and the lower guide wall 72A is the central portion of the lower edge 121d of the first upper end joint plate 121. The pair of side guide walls 73A is erected at the central portion of each side edge 121e of the first top end joint plate 121. In the example shown in FIG. 11A, the width dimensions of the upper guide wall 71A, the lower guide wall 72A, and the side guide wall 73A are respectively at the upper edge 121c, the lower edge 121d, and the side edge 121e of the first top end joint plate 121. The gap G is set smaller than the length of the side, and a gap G is formed between the upper guide wall 71A and the side guide wall 73A and between the lower guide wall 72A and the side guide wall 73A in the guide member 70A. Is formed.

上記のように、図１１Ａに示すガイド部材７０Ａは、第１天端継手板１２１における外周縁の全周を覆わず、第１天端継手板１２１における外周縁の一部のみを覆っている。これによれば、左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒの連結作業時において、エレクタ装置１００のオペレータが第１天端継手板１２１に凹設された雌型連結部４０を目視し易い。   As described above, the guide member 70A shown in FIG. 11A does not cover the entire circumference of the outer peripheral edge of the first top end joint plate 121, but covers only a part of the outer peripheral edge of the first top end joint plate 121. According to this, at the time of connection work of the left steel support 10L and the right steel support 10R, the operator of the elector device 100 visually observes the female connection portion 40 recessed in the first top end joint plate 121. easy.

なお、図１１Ａに示すガイド部材７０Ａにおいて、第１天端継手板１２１の外面１２１ａに対するガイド部材７０Ａ（上方ガイド壁７１Ａ、下方ガイド壁７２Ａ、及び一対の側方ガイド壁７３Ａの高さ）の突出寸法は、第２天端継手板１２２の外面１２２ａから突出する雄型係止部材５１の突出長さより大きな寸法に設定されている。これにより、左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒの連結時に、ガイド部材７０Ａによって第２天端継手板１２２を好適にガイドし、雌型連結部４０における挿入口４８の位置に雄型係止部材５１を円滑に導くことができる。例えば、第１天端継手板１２１の外面１２１ａに対するガイド部材７０Ａの突出寸法は、第２天端継手板１２２の外面１２２ａに対する雄型係止部材５１の突出長さに比べて２０〜３０ｍｍ程度大きな寸法に設定しても良い。   In the guide member 70A shown in FIG. 11A, the projection of the guide member 70A (the height of the upper guide wall 71A, the lower guide wall 72A, and the pair of side guide walls 73A) with respect to the outer surface 121a of the first top end joint plate 121. The dimension is set to be larger than the projecting length of the male locking member 51 projecting from the outer surface 122 a of the second top end joint plate 122. Thereby, at the time of connection of the left steel support 10L and the right steel support 10R, the second top end joint plate 122 is suitably guided by the guide member 70A, and The mold locking member 51 can be guided smoothly. For example, the projection dimension of the guide member 70A with respect to the outer surface 121a of the first top end joint plate 121 is larger by about 20 to 30 mm than the projection length of the male locking member 51 with respect to the outer surface 122a of the second top end joint plate 122 The dimensions may be set.

次に、図１１Ｂに示すガイド部材７０Ｂについて説明する。ガイド部材７０Ｂは、第１天端継手板１２１の外周縁において角部を形成する２辺（２面）に設けられたガイド壁を有している。具体的には、ガイド部材７０Ｂは、第１天端継手板１２１の上縁１２１ｃから立設する上方ガイド壁７１Ｂと、第１天端継手板１２１の一方の側縁１２１ｅから立設する一の側方ガイド壁７３Ｂを有している。ここで、図１１Ｂに示すように、上方ガイド壁７１Ａの幅寸法は、当該上方ガイド壁７１Ａが設けられている第１天端継手板１２１における上縁１２１ｃの長さよりも小さい。また、側方ガイド壁７３Ｂの幅寸法は、当該側方ガイド壁７３Ｂが設けられている第１天端継手板１２１における側縁１２１ｅの長さよりも小さい。   Next, the guide member 70B shown in FIG. 11B will be described. The guide member 70B has a guide wall provided on two sides (two surfaces) forming a corner on the outer peripheral edge of the first top end joint plate 121. Specifically, the guide member 70B is provided with an upper guide wall 71B erecting from the upper edge 121c of the first top end joint plate 121 and one guiding side erected from one side edge 121e of the first top end joint plate 121. It has a side guide wall 73B. Here, as shown in FIG. 11B, the width dimension of the upper guide wall 71A is smaller than the length of the upper edge 121c of the first top end joint plate 121 in which the upper guide wall 71A is provided. Moreover, the width dimension of the side guide wall 73B is smaller than the length of the side edge 121e in the 1st top end joint board 121 in which the said side guide wall 73B is provided.

図１１Ｂに示すガイド部材７０Ｂは、第１天端継手板１２１における外周縁のうち、角部を形成する２辺から突設する上方ガイド壁７１Ｂ及び側方ガイド壁７３Ｂから構成されているため、上方ガイド壁７１Ｂ及び側方ガイド壁７３Ｂ間に形成される隙間Ｇをより一層大きく確保することができる。よって、左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒの連結時における雌型連結部４０の視認性を一段と高めることができる。また、互いに
直交する上方ガイド壁７１Ｂ及び側方ガイド壁７３Ｂによって入隅部が形成されるため、左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒの連結時に第２天端継手板１２２における上縁１２２ｃ及び側縁１２２ｅからなる角部を上記入隅部に当接するようにして、第２天端継手板１２２を適正な位置にガイドすることができる。その結果、雌型連結部４０の挿入口４８に雄型係止部材５１を好適に導くことができ、左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒを円滑に連結できる。 Since the guide member 70B shown in FIG. 11B is configured by the upper guide wall 71B and the side guide wall 73B protruding from two sides forming the corner portion in the outer peripheral edge of the first top end joint plate 121, The gap G formed between the upper guide wall 71B and the side guide wall 73B can be further increased. Therefore, the visibility of the female connection 40 at the time of connection of the left steel support 10L and the right steel support 10R can be further enhanced. Further, since the inward corner portion is formed by the upper guide wall 71B and the side guide wall 73B which are orthogonal to each other, the upper end of the second top end joint plate 122 when the left steel support 10L and the right steel support 10R are connected. The second top end joint plate 122 can be guided to a proper position by bringing the corner portion consisting of the edge 122 c and the side edge 122 e into contact with the above-mentioned inward corner portion. As a result, the male locking member 51 can be suitably guided to the insertion port 48 of the female coupling portion 40, and the left steel support 10L and the right steel support 10R can be smoothly connected.

なお、図１１Ｂに示すガイド部材７０Ｂにおける側方ガイド壁７３Ｂは、左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒの連結時において、切羽に面する方（すなわち、エレクタ装置１００に面していない方）の側縁１２１ｅに設置されている。本実施形態におけるガイド部材７０Ｂによれば、第１天端継手板１２１における下縁１２１ｄ、及び、切羽に面していない方（すなわち、エレクタ装置１００に面する方）の側縁１２１ｅがガイド壁によって覆われておらず、開放されているため、左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒの連結時にエレクタ装置１００のオペレータが第１天端継手板１２１の雌型連結部４０をより一層目視し易くなる。   The side guide wall 73B of the guide member 70B shown in FIG. 11B faces the face (i.e., faces the elector device 100) when the left steel support 10L and the right steel support 10R are connected. It is installed in the side edge 121e of the one). According to the guide member 70B in the present embodiment, the lower edge 121d of the first top end joint plate 121 and the side edge 121e of the side not facing the face (that is, the side facing the elector device 100) Because the left side steel support 10L and the right side steel support 10R are connected, the operator of the elector device 100 can make the female connecting portion 40 of the first top end joint plate 121 It becomes easier to view.

＜実施形態３＞
次に、本発明の実施形態３について説明する。図１２及び図１３は、実施形態３に係る鋼製支保工の連結構造を説明する図である。図１２に、実施形態３における左側鋼製支保工１０Ｌの第１天端継手板１２１の周辺構造を示す。図１３に、実施形態３における右側鋼製支保工１０Ｒの第２天端継手板１２２の周辺構造を示す。 Embodiment 3
Next, a third embodiment of the present invention will be described. FIG.12 and FIG.13 is a figure explaining the connection structure of steel support maintenance concerning Embodiment 3. FIG. FIG. 12 shows the peripheral structure of the first top end joint plate 121 of the left steel support 10L according to the third embodiment. FIG. 13 shows the peripheral structure of the second top end joint plate 122 of the right side steel support 10R in the third embodiment.

図１２（ａ）は、実施形態３に係る左側鋼製支保工１０Ｌにおける第１天端継手板１２１近傍の縦断面図である。図１２（ｂ）は、図１２（ａ）のＣ矢視正面図である。図１２（ｃ）は、実施形態３に係る第１天端継手板１２１の概略斜視図である。図１３（ａ）は、実施形態３に係る右側鋼製支保工１０Ｒの第２天端継手板１２２近傍の縦断面図である。図１３（ｂ）は、図１３（ａ）のＤ矢視正面図である。図１３（ｃ）は、実施形態３に係る第２天端継手板１２２の概略斜視図である。なお、図１２（ｃ）において、左側鋼製支保工１０Ｌにおける第１本体部１１１の図示を省略している。また、図１３（ｃ）において、右側鋼製支保工１０Ｒにおける第２本体部１１２の図示を省略している。   FIG. 12A is a longitudinal cross-sectional view of the vicinity of the first top end joint plate 121 in the left steel support retaining structure 10L according to the third embodiment. FIG.12 (b) is C arrow directional front view of Fig.12 (a). FIG. 12C is a schematic perspective view of the first top end joint plate 121 according to the third embodiment. FIG. 13A is a longitudinal cross-sectional view in the vicinity of the second top end joint plate 122 of the right steel support 10R according to the third embodiment. FIG.13 (b) is the D arrow front view of FIG. 13 (a). FIG. 13C is a schematic perspective view of the second top end joint plate 122 according to the third embodiment. In addition, in FIG.12 (c), illustration of the 1st main-body part 111 in 10 L of left steel supports is abbreviate | omitted. Moreover, in FIG.13 (c), illustration of the 2nd main-body part 112 in 10R of right steel supports is abbreviate | omitted.

実施形態３における左側鋼製支保工１０Ｌの第１天端継手板１２１は、凹面形状Ｓ１を有している。また、実施形態３における右側鋼製支保工１０Ｒの第２天端継手板１２２は、上記凹面形状Ｓ１と相補的な凸面形状Ｓ２を有しており、左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒが連結される際に第１天端継手板１２１及び第２天端継手板１２２同士が面接触するように構成されている。   The first top end joint plate 121 of the left steel support 10L according to the third embodiment has a concave shape S1. Further, the second top end joint plate 122 of the right side steel support 10R in the third embodiment has a convex shape S2 complementary to the concave shape S1, and the left side steel support 10L and the right side steel support When the work 10R is connected, the first upper end joint plate 121 and the second upper end joint plate 122 are configured to be in surface contact with each other.

より具体的には、第１天端継手板１２１は、外面１２１ａ側が凹面（凹面形状Ｓ１）となるように略Ｖ字形状（谷型）に折られた折板構造を有している。第１天端継手板１２１の外面１２１ａは、平坦な凹底面部１２１０と、当該凹底面部１２１０の両側に形成された上斜面部１２１１及び下斜面部１２１２を含む。平坦な凹底面部１２１０を基準として、当該凹底面部１２１０に対する上斜面部１２１１及び下斜面部１２１２の傾斜角度は等しい。一方、第２天端継手板１２２は、外面１２２ａ側が凸面（凸面形状Ｓ２）となるように略Ｖ字形状（山型）に折られた折板構造を有している。第２天端継手板１２２の外面１２２ａは、平坦な凸頂面部１２２０と、当該凸頂面部１２２０の両側に形成された上斜面部１２２１及び下斜面部１２２２を含む。   More specifically, the first top end joint plate 121 has a folded plate structure folded in a substantially V shape (valley shape) such that the outer surface 121a side is concave (concave shape S1). The outer surface 121 a of the first top end joint plate 121 includes a flat concave bottom surface 1210 and an upper slope 1211 and a lower slope 1212 formed on both sides of the concave bottom 1210. The inclination angles of the upper slope 1211 and the lower slope 1212 with respect to the flat bottom surface 1210 are the same. On the other hand, the second top end joint plate 122 has a folded plate structure in which the outer surface 122a side is a convex surface (convex surface shape S2) so that it is folded in a substantially V shape (mountain shape). The outer surface 122 a of the second top end joint plate 122 includes a flat convex top surface 1220 and an upper slope 1221 and a lower slope 1222 formed on both sides of the convex top 1220.

ここで、第１天端継手板１２１に設けられる一対の雌型連結部４０は、凹底面部１２１０に配列されている。ここで、凹底面部１２１０は、凹面形状Ｓ１を有する第１天端継手板１２１において、相対的に最も凹んだ領域である。また、第２天端継手板１２２に設け
られる一対の雄型連結部５０（雄型係止部材５１）は凸頂面部１２２０に配列されている。ここで、凸頂面部１２２０は、凸面形状Ｓ２を有する第２天端継手板１２２において、相対的に最も隆起した領域である。また、雌型連結部４０及び雄型連結部５０については、実施形態１及び２と共通である。本実施形態においては、雌型連結部４０に対して雄型係止部材５１が挿入及び係止された際に、第１天端継手板１２１及び第２天端継手板１２２の各外縁同士の位置がすべて合致し、且つ、第１天端継手板１２１の外面１２１ａ及び第２天端継手板１２２の外面１２２ａが面接触するようになっている。より詳しくは、第１天端継手板１２１の凹底面部１２１０、上斜面部１２１１及び下斜面部１２１２がそれぞれ、第２天端継手板１２２の凸頂面部１２２０、上斜面部１２２１及び下斜面部１２２２と隙間を生じさせることなく面接触するように調整されている。 Here, the pair of female connection portions 40 provided in the first top end joint plate 121 are arranged in the concave bottom surface portion 1210. Here, the concave bottom surface portion 1210 is a region which is relatively most recessed in the first top end joint plate 121 having the concave shape S1. In addition, a pair of male connection portions 50 (male locking members 51) provided on the second top end joint plate 122 are arranged in the convex top surface portion 1220. Here, the convex top surface portion 1220 is a region relatively most raised in the second top end joint plate 122 having the convex shape S2. The female connector 40 and the male connector 50 are the same as in the first and second embodiments. In the present embodiment, when the male locking member 51 is inserted into and locked to the female connection portion 40, the outer edges of the first top end joint plate 121 and the second top end joint plate 122 The positions are all matched, and the outer surface 121a of the first top end joint plate 121 and the outer surface 122a of the second top end joint plate 122 are in surface contact with each other. More specifically, the concave bottom surface 1210, upper slope 1211 and lower slope 1212 of the first top end joint plate 121 are respectively the convex top surface 1220, upper slope 1221 and lower slope of the second top end joint plate 122. It is adjusted to be in surface contact with the 1222 without creating a gap.

図１４は、実施形態３における左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒを連結する際の動作を説明する図である。図示のように、本実施形態における鋼製支保工の連結構造においては、左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒを連結する際に、第１天端継手板１２１の凹面に沿って雄型連結部５０の雄型係止部材５１が摺動する。図１４に示す例では、右側鋼製支保工１０Ｒにおける上斜面部１２１１の表面に沿って雄型連結部５０の雄型係止部材５１が摺動することでガイドされ、雌型連結部４０における挿入口４８と雄型係止部材５１の中心同士が一致する方向に雄型係止部材５１が導かれる。これにより、雌型連結部４０における挿入口４８から収納室４２内に円滑に雄型係止部材５１を挿入することができ、雌型連結部４０に対して雄型係止部材５１を係合することができる。   FIG. 14 is a view for explaining the operation at the time of connecting the left steel support 10L and the right steel support 10R in the third embodiment. As illustrated, in the connection structure of steel supports in the present embodiment, along the concave surface of the first top end joint plate 121 when connecting the left steel support 10L and the right steel support 10R. The male locking member 51 of the male connector 50 slides. In the example shown in FIG. 14, the male locking member 51 of the male connector 50 is guided by sliding along the surface of the upper slope 1211 in the right steel support 10R, and the female connector 40 The male locking member 51 is guided in the direction in which the centers of the insertion port 48 and the male locking member 51 coincide with each other. Thereby, the male locking member 51 can be smoothly inserted into the storage chamber 42 from the insertion port 48 in the female connection portion 40, and the male locking member 51 is engaged with the female connection portion 40. can do.

なお、本実施形態においては、凹面形状Ｓ１を有する第１天端継手板１２１のうちの最も凹んだ領域である凹底面部１２１０に雌型連結部４０を配置し、凸面形状Ｓ２を有する第２天端継手板１２２のうちの最も隆起した領域である凸面形状Ｓ２を有する第２天端継手板１２２において、相対的に最も隆起した領域である凸頂面部１２２０に雄型連結部５０（雄型係止部材５１）を配置するようにした。これによれば、第１天端継手板１２１の凹面に沿って雄型係止部材５１をガイドする際に、雌型連結部４０の挿入口４８に対してより一層円滑に雄型係止部材５１を導くことができる。なお、図１４に示す例では、第１天端継手板１２１の上斜面部１２１１を雄型係止部材５１のガイド面として機能させる例を示したが、第１天端継手板１２１の下斜面部１２１２に沿って雄型係止部材５１を摺動させることで、下斜面部１２１２を雄型係止部材５１のガイド面として機能させても良い。なお、本実施形態における雌型連結部４０及び雄型連結部５０の構造は、上述までの実施形態と同様である。   In the present embodiment, the female connection portion 40 is disposed on the concave bottom portion 1210 which is the most concave region of the first top end joint plate 121 having the concave shape S1, and the second shape having the convex shape S2 is provided. In the second top end joint plate 122 having the convex shape S2 which is the most raised region of the top end joint plate 122, the male connection portion 50 (male type) is formed on the convex top surface 1220 which is the relatively most raised region. The locking member 51) is arranged. According to this, when guiding the male locking member 51 along the concave surface of the first top end joint plate 121, the male locking member can be further smoothly made to the insertion port 48 of the female connecting portion 40. Can lead 51. In the example shown in FIG. 14, the upper slope portion 1211 of the first top end joint plate 121 functions as a guide surface of the male locking member 51, but the lower slope of the first top end joint plate 121 The lower slope 1212 may function as a guide surface of the male locking member 51 by sliding the male locking member 51 along the portion 1212. The structures of the female connector 40 and the male connector 50 in the present embodiment are the same as those in the above embodiments.

また、図１４に示すように、雌型連結部４０に雄型係止部材５１が締結された状態では、第１天端継手板１２１の外面１２１ａ及び第２天端継手板１２２の外面１２２ａが面接触されている。すなわち、第１天端継手板１２１の凹底面部１２１０、上斜面部１２１１及び下斜面部１２１２がそれぞれ、第２天端継手板１２２の凸頂面部１２２０、上斜面部１２２１及び下斜面部１２２２と面接触していることから、第１天端継手板１２１及び第２天端継手板１２２間の応力伝達を確実に行うことができる。なお、図１２乃至図１４に示す例では、第１天端継手板１２１の凹面形状Ｓ１及び第２天端継手板１２２の凸面形状Ｓ２を相補関係にある略Ｖ字形状とする場合を説明したが、凹面形状Ｓ１及び凸面形状Ｓ２は種々の組み合わせが採用できる。   Further, as shown in FIG. 14, in a state in which the male locking member 51 is fastened to the female connection portion 40, the outer surface 121 a of the first top end joint plate 121 and the outer surface 122 a of the second top end joint plate 122 are It is in face contact. That is, the concave bottom surface 1210, upper slope 1211 and lower slope 1212 of the first top end joint plate 121 are respectively the convex top surface 1220, upper slope 1221 and lower slope 1222 of the second top end joint plate 122 Since surface contact is made, stress can be reliably transmitted between the first top end joint plate 121 and the second top end joint plate 122. In the example shown in FIGS. 12 to 14, the case where the concave shape S1 of the first top end joint plate 121 and the convex shape S2 of the second top end joint plate 122 have a substantially V shape complementary to each other has been described. However, various combinations of the concave shape S1 and the convex shape S2 can be adopted.

以上、本発明の実施形態及び変形例を説明したが、本発明に係る鋼製支保工の連結構造はこれらに限られず、可能な限りこれらを組み合わせることができる。   As mentioned above, although the embodiment and modification of the present invention were described, the connection structure of steel supports concerning the present invention is not restricted to these, As long as possible, these can be combined.

１０・・・トンネル支保工
１０Ｌ・・・左側鋼製支保工
１０Ｒ・・・右側鋼製支保工
４０・・・雌型連結部
４１・・・ケーシング
４２・・・収納室
４６・・・雌型係止部材
４８・・・挿入口
５０・・・雄型連結部
５１・・・雄型係止部材
１１１・・・第１本体部
１１２・・・第２本体部
１２１・・・第１天端継手板
１２２・・・第２天端継手板 10: Tunnel support 10L: Left steel support 10R: Right steel support 40: Female connection portion 41: Casing 42: Storage room 46: Female type Locking member 48 ··· Insertion port 50 · · · Male connection portion 51 ··· Male locking member 111 ··· First main body portion 112 ··· Second main body portion 121 ··· First upper end Joint plate 122 ··· Second top end joint plate

Claims (10)

トンネル坑壁に沿って建て込まれる円弧状に分割された一対の鋼製支保工をそれぞれの天端部同士で相互に連結するための連結構造であって、
前記一対の鋼製支保工の天端部にそれぞれ設けられ、当該一対の鋼製支保工が連結される際に互いに当接される第１天端継手板及び第２天端継手板と、
前記第１天端継手板に凹設された雌型連結部と、
前記第２天端継手板に凸設された雄型連結部と、
を備え、
前記雄型連結部は、前記第２天端継手板から突出する棒状の雄型係止部材を有し、
前記雌型連結部は、前記第１天端継手板に貫通形成される開口孔と、前記開口孔と連通すると共に前記雄型係止部材を挿入可能な挿入口が開口形成される収納室を内部に有するケーシングと、を含み、前記挿入口から前記収納室内へ挿入された前記雄型係止部材を係止する、
鋼製支保工の連結構造。 A connecting structure for connecting a pair of arc-shaped divided steel supports erected along a tunnel pit wall to each other at their top ends,
A first upper end joint plate and a second upper end joint plate respectively provided at the top ends of the pair of steel supports and brought into contact with each other when the pair of steel supports are connected;
A female connection portion recessed in the first top end joint plate;
A male connecting portion provided in a convex shape on the second top end joint plate;
Equipped with
The male connection portion has a rod-shaped male locking member protruding from the second top end joint plate,
The female connection portion is an opening formed through the first top end joint plate, and a storage chamber in communication with the opening and in which an insertion port through which the male locking member can be inserted is formed. And a casing having the inside, which locks the male locking member inserted into the storage chamber from the insertion port.
Connection structure of steel supports. 前記雌型連結部は、前記収納室に形成されると共に前方が縮径するテーパ面を有するテーパ穴と、前記テーパ穴内において周方向に複数に分割されて且つ前記テーパ面に沿って摺動可能に配置された楔状の雌型係止部材と、前記雌型係止部材の内面に複数並設された周方向の雌側係止溝と、前記雌型係止部材を前方に押圧する押圧部材と、を更に含み、
前記雄型連結部は、前記雄型係止部材の外周に複数並設された周方向の雄側係止溝を更に含み、
前記雄型係止部材が前記雌型連結部の前記挿入口から挿入される際には、前記雄型係止部材が前記押圧部材の押圧力に抗して前記雌型係止部材を前記テーパ面に沿って後退させることで当該雌型係止部材の内面を拡径しつつ前記雄型係止部材が前記収納室に挿入され、
前記収納室への前記雄型係止部材の挿入が完了した際には、前記押圧部材の押圧力によって前記雌型係止部材が前記テーパ面に沿って前方へ押し戻されることで当該雌型係止部材の内面が縮径し、前記雌側係止溝及び前記雄側係止溝が相互に噛合することで、前記雄型連結部及び前記雌型連結部が一体に連結される、
請求項１に記載の鋼製支保工の連結構造。 The female connection portion is formed in the storage chamber and has a tapered hole having a tapered surface whose diameter is reduced in the front, and is divided into a plurality of pieces in the circumferential direction in the tapered hole and is slidable along the tapered surface A female locking member disposed in the form of a ring, circumferential female locking grooves arranged in a plurality on the inner surface of the female locking member, and a pressing member for pressing the female locking member forwardly And further including
The male connection portion further includes circumferential male locking grooves provided in parallel on the outer periphery of the male locking member,
When the male locking member is inserted from the insertion port of the female connection portion, the male locking member is configured to taper the female locking member against the pressing force of the pressing member. By retracting along the surface, the male locking member is inserted into the storage chamber while expanding the inner diameter of the female locking member.
When the insertion of the male locking member into the storage chamber is completed, the female locking member is pushed forward along the tapered surface by the pressing force of the pressing member, and thereby the female latch is engaged. The diameter of the inner surface of the stopper member is reduced, and the male coupling portion and the female coupling portion are integrally coupled by meshing the female locking groove and the male locking groove with each other.
The connection structure of steel supports according to claim 1. 前記第１天端継手板の外周縁には、前記一対の鋼製支保工を連結する際に、前記第２天端継手板をガイドして前記雌型連結部の前記挿入口に前記雄型係止部材を導くためのガイド部材が設けられている、
請求項１又は２に記載の鋼製支保工の連結構造。 When connecting the pair of steel supports to the outer peripheral edge of the first top end joint plate, the second top end joint plate is guided and the male mold is inserted into the insertion port of the female connection portion. A guide member for guiding the locking member is provided;
The connection structure of steel supports according to claim 1 or 2. 前記ガイド部材は、前記第１天端継手板の外周縁の一部を覆うようにして設けられている、請求項３に記載の鋼製支保工の連結構造。   The connection structure of steel supports according to claim 3, wherein the guide member is provided so as to cover a part of the outer peripheral edge of the first top end joint plate. 前記ガイド部材は、前記第１天端継手板の外周縁において角部を形成する２辺に設けられている、請求項４に記載の鋼製支保工の連結構造。   5. The steel support connection structure according to claim 4, wherein the guide members are provided on two sides forming a corner on the outer peripheral edge of the first top end joint plate. 前記ガイド部材は、前記第１天端継手板の上縁に設けられた上方ガイド壁と、前記第１天端継手板のうち、前記一対の鋼製支保工の連結時において切羽に面する方の側縁に設けられた側方ガイド壁と、を有する、
請求項５に記載の鋼製支保工の連結構造。 The guide member faces the face when connecting the pair of steel supports among the upper guide wall provided on the upper edge of the first top end joint plate and the first top end joint plate Side guide walls provided at the side edges of the
The connection structure of steel supports according to claim 5. 前記第１天端継手板が凹面形状を有していると共に、前記第２天端継手板が、前記第１天端継手板の凹面形状と相補的な凸面形状を有していることで、前記一対の鋼製支保工が
連結される際に前記第１天端継手板及び前記第２天端継手板同士が面接触するように形成されており、
前記一対の鋼製支保工を連結する際に、前記第１天端継手板の凹面に沿って前記雄型係止部材が摺動することで、当該凹面が前記雄型係止部材を前記雌型連結部の前記挿入口に導くためのガイドとして機能する、
請求項１又は２に記載の鋼製支保工の連結構造。 The first top end joint plate has a concave shape, and the second top end joint plate has a convex shape complementary to the concave shape of the first top end joint plate, The first upper end joint plate and the second upper end joint plate are formed to be in surface contact with each other when the pair of steel supports are connected,
When connecting the pair of steel supports, the male locking member slides along the concave surface of the first top end joint plate so that the concave surface is the female locking member. Act as a guide for guiding the mold connector into the insertion opening,
The connection structure of steel supports according to claim 1 or 2. 前記雌型連結部は、前記凹面形状を有する前記第１天端継手板の領域内において最も凹んでいる領域に配置されており、
前記雄型係止部材は、前記凸面形状を有する前記第２天端継手板の領域内において最も隆起した領域に配置されている、
請求項７に記載の鋼製支保工の連結構造。 The female connection portion is disposed in the most recessed area in the area of the first top end joint plate having the concave shape,
The male locking member is disposed in the most raised area in the area of the second top end joint plate having the convex shape.
The connection structure of steel supports according to claim 7. 前記開口孔は、第１天端継手板の厚さ方向における内面側から外面側にかけて拡径するテーパ面を有する、
請求項１から８の何れか一項に記載の鋼製支保工の連結構造。 The opening hole has a tapered surface whose diameter increases from the inner surface side to the outer surface side in the thickness direction of the first top end joint plate,
The connection structure of steel supports according to any one of claims 1 to 8. 前記雄型係止部材の先端部には、先端に向かって縮径するテーパ面が形成されている、請求項１から９の何れか一項に記載の鋼製支保工の連結構造。   The steel support connection structure according to any one of claims 1 to 9, wherein a tapered surface whose diameter decreases toward the tip is formed at the tip of the male locking member.
JP2017077181A 2017-04-07 2017-04-07 Steel support construction connection structure, connection method, and erection method Active JP6374050B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2017077181A JP6374050B1 (en) 2017-04-07 2017-04-07 Steel support construction connection structure, connection method, and erection method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2017077181A JP6374050B1 (en) 2017-04-07 2017-04-07 Steel support construction connection structure, connection method, and erection method

Publications (2)

Publication Number Publication Date
JP6374050B1 JP6374050B1 (en) 2018-08-15
JP2018178451A true JP2018178451A (en) 2018-11-15

Family

ID=63165834

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2017077181A Active JP6374050B1 (en) 2017-04-07 2017-04-07 Steel support construction connection structure, connection method, and erection method

Country Status (1)

Country Link
JP (1) JP6374050B1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109736857A (en) * 2019-01-17 2019-05-10 中交二公局东萌工程有限公司 A kind of spliced steel arch-shelf and preparation method thereof
JP7433610B2 (en) 2020-05-26 2024-02-20 大成建設株式会社 Connection structure of tunnel support and construction method of tunnel support

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108643923B (en) * 2018-04-23 2020-08-25 山东大学 Fabricated supporting structure and construction method using same
JP7157399B2 (en) * 2018-11-02 2022-10-20 株式会社三ツ知 Connectors used for tunnel steel shoring
JP2020143429A (en) * 2019-03-04 2020-09-10 株式会社安藤・間 Connection structure for tunnel timbering
JP7297206B2 (en) * 2019-03-04 2023-06-26 株式会社安藤・間 Connection Structure and Connection Method of Tunnel Shoring
CN110185478B (en) * 2019-05-31 2020-10-09 中国铁建重工集团股份有限公司 Splicing device, steel arch frame section and steel arch frame

Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS517934U (en) * 1974-07-02 1976-01-21
JPS5490831A (en) * 1978-11-22 1979-07-18 Kubota Ltd Structure for joining timbers
US4685839A (en) * 1985-09-13 1987-08-11 Hollybank Engineering Company Limited Fishplate
JPH0731934U (en) * 1993-11-19 1995-06-16 川崎製鉄株式会社 H-shaped steel sheet pile
JPH07317744A (en) * 1994-03-30 1995-12-08 Ishikawajima Constr Materials Co Ltd Joining construction and joining tool
JPH08284593A (en) * 1995-04-14 1996-10-29 Junichi Tsuzuki Joint structure of concrete segment
JPH09177186A (en) * 1995-12-27 1997-07-08 East Japan Railway Co Connection device between bar steel materials and connection method
JPH09268898A (en) * 1996-03-29 1997-10-14 Kajima Corp Method and device for replacement of crown of tunnel supporting member
JPH10339098A (en) * 1997-06-06 1998-12-22 Taisei Corp Segment
JP2000045695A (en) * 1998-07-27 2000-02-15 Ohbayashi Corp Connection structure for tunnel timbering material
JP2004332209A (en) * 2003-04-30 2004-11-25 Mitsutomo:Kk Connecting device
JP2007138427A (en) * 2005-11-15 2007-06-07 Maeda Corp Tunnel support erection method and tunnel support erection system
JP2012197559A (en) * 2011-03-18 2012-10-18 Kajima Corp Tunnel support guiding and building method
JP2015048656A (en) * 2013-09-03 2015-03-16 日本ヒューム株式会社 Joint part structure of segment
JP2015229173A (en) * 2014-06-04 2015-12-21 株式会社横山基礎工事 Welding jig for steel material and welding method

Patent Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS517934U (en) * 1974-07-02 1976-01-21
JPS5490831A (en) * 1978-11-22 1979-07-18 Kubota Ltd Structure for joining timbers
US4685839A (en) * 1985-09-13 1987-08-11 Hollybank Engineering Company Limited Fishplate
JPH0731934U (en) * 1993-11-19 1995-06-16 川崎製鉄株式会社 H-shaped steel sheet pile
JPH07317744A (en) * 1994-03-30 1995-12-08 Ishikawajima Constr Materials Co Ltd Joining construction and joining tool
JPH08284593A (en) * 1995-04-14 1996-10-29 Junichi Tsuzuki Joint structure of concrete segment
JPH09177186A (en) * 1995-12-27 1997-07-08 East Japan Railway Co Connection device between bar steel materials and connection method
JPH09268898A (en) * 1996-03-29 1997-10-14 Kajima Corp Method and device for replacement of crown of tunnel supporting member
JPH10339098A (en) * 1997-06-06 1998-12-22 Taisei Corp Segment
JP2000045695A (en) * 1998-07-27 2000-02-15 Ohbayashi Corp Connection structure for tunnel timbering material
JP2004332209A (en) * 2003-04-30 2004-11-25 Mitsutomo:Kk Connecting device
JP2007138427A (en) * 2005-11-15 2007-06-07 Maeda Corp Tunnel support erection method and tunnel support erection system
JP2012197559A (en) * 2011-03-18 2012-10-18 Kajima Corp Tunnel support guiding and building method
JP2015048656A (en) * 2013-09-03 2015-03-16 日本ヒューム株式会社 Joint part structure of segment
JP2015229173A (en) * 2014-06-04 2015-12-21 株式会社横山基礎工事 Welding jig for steel material and welding method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
水谷和彦: "鋼製支保工建込みロボットの開発", 国土交通省北海道開発局ホームページ, JPN6018024828, 22 February 2018 (2018-02-22), JP, ISSN: 0003829032 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109736857A (en) * 2019-01-17 2019-05-10 中交二公局东萌工程有限公司 A kind of spliced steel arch-shelf and preparation method thereof
JP7433610B2 (en) 2020-05-26 2024-02-20 大成建設株式会社 Connection structure of tunnel support and construction method of tunnel support

Also Published As

Publication number Publication date
JP6374050B1 (en) 2018-08-15

Similar Documents

Publication Publication Date Title
JP2018178451A (en) Connection structure, connection method and erecting method of steel support
JP6374051B1 (en) How to build a tunnel
JP6381939B2 (en) Cut beam device and retaining support
KR20070096885A (en) Drilling tool and drilling method
JP2998097B2 (en) Expanding bit
JP2021185305A (en) Temporary fastening jig and temporary fastening method
KR20100055650A (en) Narrowness space diastole
JP2018178452A (en) Connection structure and connection method of steel support
JP7088778B2 (en) How to build a tunnel
KR101957438B1 (en) Drilling bit with extensible casing and non-welding coupler and tunnel construction method for extended cutting pipe therewith
KR101814765B1 (en) Hydraulic driving machine of excavator and method for excavating using this same
JP2019085849A (en) Connection structure for divided supporting
KR101255517B1 (en) The tunel execution method and the using fabric
JP6969061B2 (en) Connection structure of split support
JP6395416B2 (en) Construction method of steel continuous retaining wall with lightweight steel sheet pile
JP2023120913A (en) Tunnel shoring and shoring connection method
JP2022099883A (en) Existing pile extraction device
JP7338952B2 (en) Connection structure and connection method of steel shoring
JP7024938B2 (en) Connection structure of split support
JP4031642B2 (en) Structure of shield machine and method for replacing roller cutter
JP7147118B2 (en) Connection method and connection structure of tunnel shoring
JP6715164B2 (en) Pipe roof construction method
JP2019085847A (en) Connection structure for divided supporting
JP7294947B2 (en) Erector device and method for connecting shoring pieces
JP3728449B1 (en) Underground obstacle removal apparatus and underground obstacle removal method using the same

Legal Events

Date Code Title Description
A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20180618

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20180703

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20180718

R150 Certificate of patent or registration of utility model

Ref document number: 6374050

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150