JP2021025249A - Thrust force transmission device for thrust building method - Google Patents

Thrust force transmission device for thrust building method Download PDF

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JP2021025249A
JP2021025249A JP2019142140A JP2019142140A JP2021025249A JP 2021025249 A JP2021025249 A JP 2021025249A JP 2019142140 A JP2019142140 A JP 2019142140A JP 2019142140 A JP2019142140 A JP 2019142140A JP 2021025249 A JP2021025249 A JP 2021025249A
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propulsion
band
pipe
transmission device
force
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JP7284027B2 (en
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誠二 松島
Seiji Matsushima
誠二 松島
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Nippon Chutetsukan KK
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Abstract

To provide a thrust force transmission device for a thrust building method used for a thrust building method of sequentially pushing a pipe bonded by fitting a following pipe into a receiving port of a preceding pipe into a sheath pipe and building a new pipe in the sheath pipe, and a ring-shaped band attached to an outer periphery of an insertion port does not slide from the insertion port during thrusting.SOLUTION: A thrust force transmission portion that comes in contact with an end face of a receiving port and transmits a pushing force of a following pipe to a preceding pipe, and posture change means that changes an attachment posture of a band when the pushing force exceeds a predetermined force are provided at the band.SELECTED DRAWING: Figure 9

Description

この発明は、先行管の受け口に後行管の挿し口を嵌め込むことにより接合した管を、順次、予め地中に敷設されたさや管内に押し込んで、新設管をさや管内に敷設する推進敷設工法に使用され、挿し口の外周面に固定されて後行管の推進力を先行管に伝達する推進敷設工法用推進力伝達装置に関するものである。 In the present invention, the pipes joined by fitting the insertion port of the trailing pipe into the receiving port of the preceding pipe are sequentially pushed into the sheath pipe laid in the ground in advance, and the new pipe is laid in the sheath pipe. It relates to a propulsion force transmission device for the propulsion laying method, which is used in the construction method and is fixed to the outer peripheral surface of the insertion port to transmit the propulsion force of the trailing pipe to the preceding pipe.

近年、道路工事による交通障害や掘削残土の処理等の問題が少なく、しかも、軌道下等の開削工事が行えない場所であっても管の敷設が可能なさや管式推進敷設工法が実施されている。 In recent years, there have been few problems such as traffic obstacles due to road construction and disposal of excavated soil, and a pipe-type propulsion laying method has been implemented that allows pipes to be laid even in places where excavation work cannot be performed, such as under tracks. There is.

さや管式推進敷設工法に使用される推進力伝達装置の一例が特許文献1に開示されている。以下、この推進力伝達装置を、従来推進力伝達装置という。 Patent Document 1 discloses an example of a propulsion force transmission device used in a sheath pipe type propulsion laying method. Hereinafter, this propulsion force transmission device will be referred to as a conventional propulsion force transmission device.

従来推進力伝達装置は、後行管の外周面に、円弧状部材をボルト・ナットにより円形リング状に連結することで装着された固定部材と、弾性体を介して固定部材に取り付けられ、先行管の受け口のフランジに当接する推進力伝達部材と、を備えている。 The conventional propulsion force transmission device is attached to a fixing member attached to the outer peripheral surface of a trailing pipe by connecting an arc-shaped member in a circular ring shape with bolts and nuts, and is attached to the fixing member via an elastic body, and precedes the device. It is provided with a propulsion force transmitting member that comes into contact with the flange of the receiving port of the pipe.

従来推進力伝達装置によれば、推進力伝達部材と、固定部材との間に介在する弾性体により、推進管路の状況が複雑で、カーブ推進を繰り返す場合であっても、弾性体のクッション効果と復元力により、常に確実に推進力を伝達し、推進管路に追従しながら管を推進させることができる。 According to the conventional propulsion force transmission device, the elastic body interposed between the propulsion force transmission member and the fixing member makes the condition of the propulsion pipeline complicated, and even when the curve propulsion is repeated, the elastic body cushions. Due to the effect and restoring force, the propulsive force can always be transmitted reliably and the pipe can be propelled while following the propulsion pipeline.

従来推進力伝達装置の固定方法は、まず、先行管に後行管を接合した後、後行管の挿し口の外周面に予め推進力伝達部材を固定した固定部材を仮止めし、次いで、推進力伝達部材の先端が先行管の受け口のフランジに当接するまで固定部材を移動させ、最後にボルト・ナットを本締めすることにより固定する。 In the conventional method of fixing the propulsive force transmission device, first, the trailing pipe is joined to the leading pipe, and then the fixing member to which the propulsive force transmitting member is fixed in advance is temporarily fixed to the outer peripheral surface of the insertion port of the trailing pipe, and then The fixing member is moved until the tip of the propulsive force transmission member comes into contact with the flange of the receiving port of the preceding pipe, and finally the bolts and nuts are finally tightened to fix the thrusting member.

このようにして、先行管と後行管とが、接合部に収縮代を維持した状態で接合される。 In this way, the leading pipe and the trailing pipe are joined to the joint portion while maintaining a contraction allowance.

特開2011−32632号公報Japanese Unexamined Patent Publication No. 2011-32632

上述した従来推進敷設装置を用いる工法によれば、後行管の外周面に、円弧状部材をボルト・ナットにより円形リング状に連結することで装着された固定部材と、弾性体を介して固定部材に取り付けられた推進力伝達部材により、推進管路の状況によらず常に確実に推進力を先行管に伝達し、管の耐震性を確保した状態で推進することができる。 According to the construction method using the conventional propulsion laying device described above, the arc-shaped member is connected to the outer peripheral surface of the trailing pipe in a circular ring shape by bolts and nuts, and is fixed via an elastic body. The propulsive force transmitting member attached to the member can reliably transmit the propulsive force to the preceding pipe regardless of the condition of the propulsion pipeline, and can propel the pipe in a state where the earthquake resistance of the pipe is ensured.

しかしながら、後行管の外周面に固定部材を装着する際に、円弧状部材をボルト・ナットにより円形リング状に連結をするが、ボルト・ナットの締め付け力が不足してしまうと、全ての管の推進が完了するよりも前に、管の外周面と固定部材との間に滑りが生じ、後行管の挿し口が先行管の受け口内に入り込むことにより、接合部において収縮代を維持できなくなり、管の耐震性が損なわれるという問題がある。 However, when mounting the fixing member on the outer peripheral surface of the trailing pipe, the arc-shaped member is connected in a circular ring shape by bolts and nuts, but if the tightening force of the bolts and nuts is insufficient, all pipes are connected. Before the propulsion of the pipe is completed, slippage occurs between the outer peripheral surface of the pipe and the fixing member, and the insertion port of the trailing pipe enters the receiving port of the preceding pipe, so that the contraction allowance can be maintained at the joint. There is a problem that the seismic resistance of the pipe is impaired.

そこで、本発明は、挿し口の外周面に取り付けられるリング状のバンドを含み、推進中に当該バンドと挿し口外周面との間に滑りが生じることのない推進敷設工法用推進力伝達装置を提供することを目的とする。 Therefore, the present invention includes a ring-shaped band attached to the outer peripheral surface of the insertion port, and provides a propulsion force transmission device for a propulsion laying method that does not cause slippage between the band and the outer peripheral surface of the insertion port during propulsion. The purpose is to provide.

上記課題を解決するために、請求項1に記載の発明は、先行管の受け口に後行管の挿し口を嵌め込むことにより接合した管を、順次、さや管内に押し込んで、新設管を前記さや管内に敷設する推進敷設工法に使用され、前記挿し口の外周面に固定される推進敷設工法用推進力伝達装置であって、前記挿し口の外周面に取り付けられるリング状のバンドを含み、前記バンドは、前記受け口の端面に当接して、前記後行管の押し込み力を前記先行管に伝達する推進力伝達部と、前記押し込み力が所定の力を超えた場合に、前記バンドの取り付け姿勢を変化させる姿勢変化手段と、を有することを特徴とする。 In order to solve the above problem, in the invention according to claim 1, the pipes joined by fitting the insertion port of the trailing pipe into the receiving port of the leading pipe are sequentially pushed into the sheath pipe to push the newly installed pipe into the sheath pipe. A propulsion force transmission device for the propulsion laying method used in the propulsion laying method laid in a sheath pipe and fixed to the outer peripheral surface of the insertion port, including a ring-shaped band attached to the outer peripheral surface of the insertion port. The band is attached to a propulsion force transmitting portion that abuts on the end surface of the receiving port and transmits the pushing force of the trailing pipe to the leading pipe, and when the pushing force exceeds a predetermined force, the band is attached. It is characterized by having a posture changing means for changing the posture.

請求項2に記載の発明は、請求項1に記載の推進敷設工法用推進力伝達装置であって、前記姿勢変化手段は、前記バンドをその軸直交断面において中心を通る直線で2つの領域に分けた場合の、その一方の領域の内周面の少なくとも一部に形成された、前記内周面における他の部分よりも前記挿し口の接触面との摩擦力を高くする摩擦力向上部と、前記推進力伝達部に形成され、前記押し込み力が前記所定の力を超えた場合に変形する変形部と、を有することを特徴とする。 The invention according to claim 2 is the propulsion force transmission device for the propulsion laying method according to claim 1, wherein the posture changing means extends the band into two regions by a straight line passing through the center in an axially orthogonal cross section thereof. A friction force improving portion formed on at least a part of the inner peripheral surface of one of the divided regions and having a higher frictional force with the contact surface of the insertion port than the other portion on the inner peripheral surface. It is characterized by having a deformed portion formed in the propulsive force transmitting portion and deformed when the pushing force exceeds the predetermined force.

請求項3に記載の発明は、請求項1に記載の推進敷設工法用推進力伝達装置であって、前記姿勢変化手段は、前記バンドをその軸直交断面において中心を通る直線で2つの領域に分けた場合の、その一方の領域の内周面の少なくとも一部に形成された、前記内周面における他の部分よりも前記挿し口の接触面との摩擦力を高くする摩擦力向上部を有し、前記2つの領域の他方の領域に位置する前記推進力伝達部が、前記受け口の端面に最初に当接する第1当接部を有することを特徴とする。 The invention according to claim 3 is the propulsion force transmission device for the propulsion laying method according to claim 1, wherein the posture changing means extends the band into two regions in a straight line passing through the center in an axially orthogonal cross section thereof. A frictional force improving portion formed on at least a part of the inner peripheral surface of one of the divided regions and having a higher frictional force with the contact surface of the insertion port than the other portion on the inner peripheral surface. It is characterized in that the propulsive force transmitting portion located in the other region of the two regions has a first contact portion that first contacts the end face of the socket.

請求項4に記載の発明は、請求項3に記載の推進敷設工法用推進力伝達装置であって、前記第1当接部は、前記バンドの端面から軸方向に突出していることを特徴とする。 The invention according to claim 4 is the propulsion force transmission device for the propulsion laying method according to claim 3, wherein the first contact portion projects axially from the end face of the band. To do.

請求項5に記載の発明は、請求項3に記載の推進敷設工法用推進力伝達装置であって、前記第1当接部は、前記バンドの外周面から軸方向に突出していることを特徴とする。 The invention according to claim 5 is the propulsion force transmission device for the propulsion laying method according to claim 3, wherein the first contact portion protrudes in the axial direction from the outer peripheral surface of the band. And.

請求項6に記載の発明は、請求項2に記載の推進敷設工法用推進力伝達装置であって、前記推進力伝達部は、前記挿し口の外周面に沿って間隔をあけて配される複数個の推進力伝達手段からなり、前記推進力伝達手段は、前記受け口の端面に当接し、前記後行管の押し込み力を前記先行管に伝達する推進力伝達部材と、前記バンドに固定されたブラケットと、前記さや管内において前記後行管を支持する支持部材と、前記支持部材を前記ブラケットに固定する、一端が前記ブラケットに取り付けられた固定軸と、を有し、前記推進力伝達部材には、前記バンドの軸方向に長い長孔が形成され、前記長孔には、その一方端に前記固定軸を固定し、前記長孔を仕切る仕切壁が形成され、前記固定軸の他端は、前記長孔の一方端に抜け出し不可に挿入され、当該仕切壁が、前記変形部として機能することを特徴とする。 The invention according to claim 6 is the propulsion force transmission device for the propulsion laying method according to claim 2, wherein the propulsion force transmission portions are arranged at intervals along the outer peripheral surface of the insertion port. The propulsive force transmitting means is composed of a plurality of propulsive force transmitting means, and the propulsive force transmitting means is fixed to the band and a propulsive force transmitting member that abuts on the end surface of the receiving port and transmits the pushing force of the trailing pipe to the leading pipe. The propulsive force transmission member has a bracket, a support member for supporting the trailing pipe in the sheath pipe, and a fixed shaft having one end attached to the bracket for fixing the support member to the bracket. Is formed with a long hole long in the axial direction of the band, the fixed shaft is fixed to one end of the long hole, and a partition wall for partitioning the long hole is formed in the long hole, and the other end of the fixed shaft is formed. Is inserted into one end of the elongated hole so as not to come out, and the partition wall functions as the deformed portion.

請求項7に記載の発明は、請求項5に記載の推進敷設工法用推進力伝達装置であって、前記推進力伝達部は、前記挿し口の外周面に沿って間隔をあけて配される複数個の推進力伝達手段からなり、前記推進力伝達手段は、前記受け口の端面に当接し、前記後行管の押し込み力を前記先行管に伝達する推進力伝達部材と、前記バンドに固定されたブラケットと、前記さや管内において前記後行管を支持する支持部材と、前記支持部材を前記ブラケットに固定する、一端が前記ブラケットに取り付けられた固定軸と、を有し、前記推進力伝達部材には、前記バンドの軸方向に長い長孔が形成され、前記長孔には、その一方端に前記固定軸を固定し、前記長孔を仕切る仕切壁が形成され、前記固定軸の他端は、前記長孔の一方端に抜け出し不可に挿入され、前記複数個の推進力伝達手段のうち、前記2つの領域の他方の領域に位置する推進力伝達手段が、前記第1当接部を有することを特徴とする。 The invention according to claim 7 is the propulsion force transmission device for the propulsion laying method according to claim 5, wherein the propulsion force transmission portions are arranged at intervals along the outer peripheral surface of the insertion port. The propulsive force transmitting means is composed of a plurality of propulsive force transmitting means, and the propulsive force transmitting means is fixed to the band and a propulsive force transmitting member that abuts on the end surface of the receiving port and transmits the pushing force of the trailing pipe to the leading pipe. The propulsive force transmission member has a bracket, a support member for supporting the trailing pipe in the sheath pipe, and a fixed shaft having one end attached to the bracket for fixing the support member to the bracket. Is formed with a long hole long in the axial direction of the band, the fixed shaft is fixed to one end of the long hole, and a partition wall for partitioning the long hole is formed in the long hole, and the other end of the fixed shaft is formed. Is inserted into one end of the elongated hole so as not to come out, and among the plurality of propulsive force transmitting means, the propulsive force transmitting means located in the other region of the two regions presses the first contact portion. It is characterized by having.

請求項8に記載の発明は、請求項6又は7に記載の推進敷設工法用推進力伝達装置であって、前記支持部材は、車輪からなることを特徴とする。 The invention according to claim 8 is the propulsion force transmission device for the propulsion laying method according to claim 6 or 7, wherein the support member includes wheels.

請求項9に記載の発明は、請求項6乃至8の何れか1項に記載の推進敷設工法用推進力伝達装置であって、前記推進力伝達部材の先端部は、前記受け口の前記端面と当接するように折れ曲がっていることを特徴とする。 The invention according to claim 9 is the propulsion force transmission device for the propulsion laying method according to any one of claims 6 to 8, wherein the tip end portion of the propulsion force transmission member is the end surface of the socket. It is characterized in that it is bent so as to abut.

請求項10に記載の発明は、請求項2乃至9の何れか1項に記載の推進敷設工法用推進力伝達装置であって、前記摩擦力向上部には突起が形成されていることを特徴とする。 The invention according to claim 10 is the propulsion force transmission device for the propulsion laying method according to any one of claims 2 to 9, characterized in that a protrusion is formed on the frictional force improving portion. And.

この発明によれば、後行管への後方からの押し込み力が大きくなり所定の力を超えた場合に、バンドの取り付け姿勢が斜めに変化するため、後行管の挿し口から外れることを防ぐことができる。 According to the present invention, when the pushing force from the rear to the trailing pipe becomes large and exceeds a predetermined force, the attachment posture of the band changes diagonally, so that the band is prevented from coming off from the insertion port of the trailing pipe. be able to.

第1実施形態に係る推進敷設工法用推進力伝達装置を装着した管接合部を示す部分断面斜視図である。It is a partial cross-sectional perspective view which shows the pipe joint part which attached the propulsion force transmission device for the propulsion laying method which concerns on 1st Embodiment. 第1実施形態に係る推進敷設工法用推進力伝達装置を示す斜視図である。It is a perspective view which shows the propulsion force transmission device for the propulsion laying method which concerns on 1st Embodiment. 第1実施形態に係る推進敷設工法用推進力伝達装置の爪部を拡大した部分斜視図である。It is an enlarged partial perspective view of the claw part of the propulsion force transmission device for the propulsion laying method which concerns on 1st Embodiment. 第1実施形態に係る推進敷設工法用推進力伝達装置の断面図である。It is sectional drawing of the propulsion force transmission device for the propulsion laying method which concerns on 1st Embodiment. 第1実施形態に係る推進敷設工法用推進力伝達装置を装着した管接合部を示す、初期状態(第1段階)の断面図である。It is sectional drawing of the initial state (first stage) which shows the pipe joint part which attached the propulsion force transmission device for the propulsion laying method which concerns on 1st Embodiment. (A)は、第1実施形態に係る推進敷設工法用推進力伝達装置を装着した管接合部を示す、第2段階の断面図、(B)は、第1実施形態に係る推進敷設工法用推進力伝達装置を装着した管接合部を示す、第3段階の断面図、(C)は、第3段階の仕切壁23近傍を拡大した断面図である。(A) is a sectional view of a second stage showing a pipe joint portion equipped with a propulsion force transmission device for the propulsion laying method according to the first embodiment, and (B) is for the propulsion laying method according to the first embodiment. A third-stage cross-sectional view showing a pipe joint equipped with a propulsion force transmission device, (C) is an enlarged cross-sectional view of the vicinity of the third-stage partition wall 23. 第2実施形態に係る推進敷設工法用推進力伝達装置を示す斜視図である。It is a perspective view which shows the propulsion force transmission device for the propulsion laying method which concerns on 2nd Embodiment. (A)は、第2実施形態に係る推進敷設工法用推進力伝達装置を装着した管接合部を示す、初期状態(第1段階)の断面図、(B)は、第2実施形態に係る推進敷設工法用推進力伝達装置を装着した管接合部を示す、第2段階の断面図、(C)は、第2実施形態に係る推進敷設工法用推進力伝達装置を装着した管接合部を示す、第3段階の断面図である。(A) is a sectional view in an initial state (first stage) showing a pipe joint portion equipped with a propulsion force transmission device for a propulsion laying method according to a second embodiment, and (B) is a cross-sectional view according to the second embodiment. A cross-sectional view of the second stage showing a pipe joint equipped with a propulsion force transmission device for the propulsion laying method, (C) shows a pipe joint equipped with the propulsion force transmission device for the propulsion laying method according to the second embodiment. It is sectional drawing of the 3rd stage shown. (A)は、第3実施形態に係る推進敷設工法用推進力伝達装置を示す斜視図、(B)は、第3実施形態に係る推進敷設工法用推進力伝達装置の断面図である。(A) is a perspective view showing a propulsion force transmission device for a propulsion laying method according to a third embodiment, and (B) is a sectional view of a propulsion force transmission device for a propulsion laying method according to a third embodiment. (A)は、第3実施形態に係る推進敷設工法用推進力伝達装置を装着した管接合部を示す、初期状態(第1段階)の断面図、(B)は、第3実施形態に係る推進敷設工法用推進力伝達装置を装着した管接合部を示す、第2段階の断面図、(C)は、第3実施形態に係る推進敷設工法用推進力伝達装置を装着した管接合部を示す、第3段階の断面図である。(A) is a sectional view in an initial state (first stage) showing a pipe joint portion equipped with a propulsion force transmission device for a propulsion laying method according to a third embodiment, and (B) is a sectional view according to a third embodiment. The cross-sectional view of the second stage showing the pipe joint part equipped with the propulsion force transmission device for the propulsion laying method, (C) shows the pipe joint part equipped with the propulsion force transmission device for the propulsion laying method according to the third embodiment. It is sectional drawing of the 3rd stage shown. (A)は、第4実施形態に係る推進敷設工法用推進力伝達装置を示す部分断面斜視図、(B)は、第4実施形態に係る推進敷設工法用推進力伝達装置の断面図である。(A) is a partial cross-sectional perspective view showing the propulsion force transmission device for the propulsion laying method according to the fourth embodiment, and (B) is a sectional view of the propulsion force transmission device for the propulsion laying method according to the fourth embodiment. .. (A)は、第4実施形態に係る推進敷設工法用推進力伝達装置を装着した管接合部を示す、初期状態(第1段階)の断面図、(B)は、第4実施形態に係る推進敷設工法用推進力伝達装置を装着した管接合部を示す、第2段階の断面図、(C)は、第4実施形態に係る推進敷設工法用推進力伝達装置を装着した管接合部を示す、第3段階の断面図である。(A) is a sectional view in an initial state (first stage) showing a pipe joint portion equipped with a propulsion force transmission device for the propulsion laying method according to the fourth embodiment, and (B) is the fourth embodiment. A cross-sectional view of the second stage showing a pipe joint equipped with a propulsion force transmission device for the propulsion laying method, (C) shows a pipe joint equipped with the propulsion force transmission device for the propulsion laying method according to the fourth embodiment. It is sectional drawing of the 3rd stage shown.

[第1実施形態]
次に、この発明の推進敷設工法用推進力伝達装置の第1実施態様を、図面を参照しながら説明する。
[First Embodiment]
Next, the first embodiment of the propulsion force transmission device for the propulsion laying method of the present invention will be described with reference to the drawings.

図1は、第1実施形態に係る推進敷設工法用推進力伝達装置(以下、「推進力伝達装置」という場合がある)を装着した管接合部を示す部分断面斜視図、図2は、第1実施形態に係る推進力伝達装置を示す斜視図、図3は、第1実施形態に係る推進力伝達装置の爪部を拡大した部分斜視図、図4は、第1実施形態に係る推進力伝達装置の断面図である。図5は、第1実施形態に係る推進力伝達装置を装着した管接合部を示す、初期状態(第1段階)の断面図、図6(A)は、第1実施形態に係る推進力伝達装置を装着した管接合部を示す、第2段階の断面図、図6(B)は、第1実施形態に係る推進力伝達装置を装着した管接合部を示す、第3段階の断面図、図6(C)は、第3段階の仕切壁23近傍を拡大した断面図である。 FIG. 1 is a partial cross-sectional perspective view showing a pipe joint equipped with a propulsion force transmission device for the propulsion laying method according to the first embodiment (hereinafter, may be referred to as a “propulsion force transmission device”), and FIG. 1 A perspective view showing a propulsive force transmission device according to an embodiment, FIG. 3 is an enlarged partial perspective view of a claw portion of the propulsive force transmission device according to the first embodiment, and FIG. 4 is a partial perspective view showing a propulsive force according to the first embodiment. It is sectional drawing of the transmission device. FIG. 5 is a cross-sectional view of an initial state (first stage) showing a pipe joint equipped with the propulsion force transmission device according to the first embodiment, and FIG. 6A is a propulsion force transmission according to the first embodiment. A second-stage cross-sectional view showing a pipe joint equipped with the device, FIG. 6B is a third-stage cross-sectional view showing the pipe joint equipped with the propulsion force transmission device according to the first embodiment. FIG. 6C is an enlarged cross-sectional view of the vicinity of the partition wall 23 of the third stage.

図1から図6において、第1実施形態に係る推進力伝達装置11は、後行管5の挿し口3の外周面に装着されるリング状の締め付け手段12と、挿し口3の外周面に沿って間隔をあけて配される複数個(この例では3個)の推進力伝達手段13A、13B、13C(これらを総称して推進力伝達手段13という場合がある)とからなっている。 1 to 6, the propulsion force transmitting device 11 according to the first embodiment has a ring-shaped tightening means 12 mounted on the outer peripheral surface of the insertion port 3 of the trailing pipe 5 and the outer peripheral surface of the insertion port 3. It is composed of a plurality of (three in this example) propulsion force transmitting means 13A, 13B, and 13C (these may be collectively referred to as propulsion force transmitting means 13) arranged at intervals along the line.

締め付け手段12は、一本のバンド14と、バンド14を締め付ける締め付け具としてのボルト15とナット16とからなっている。ボルト15は、バンド14の両端に通され、ボルト15に螺合するナット16を締めることによって、バンド14が締め付けられる。なお、締め付け手段12は、複数本のバンド14同士を締め付け具としてのボルト15とナット16とによりリング状に連結したものであってもよい。 The tightening means 12 includes one band 14, a bolt 15 and a nut 16 as a tightening tool for tightening the band 14. The bolt 15 is passed through both ends of the band 14, and the band 14 is tightened by tightening the nut 16 screwed onto the bolt 15. The tightening means 12 may have a plurality of bands 14 connected to each other in a ring shape by bolts 15 and nuts 16 as tightening tools.

図3に示すように、バンド14の内周面であって、ボルト15とナット16によってバンド14を締め付ける部分の近傍には、爪部24が形成されている。爪部24は、バンド14の内周面における他の部分よりも挿し口3の接触面との摩擦力を高くするために形成されている。 As shown in FIG. 3, a claw portion 24 is formed on the inner peripheral surface of the band 14 in the vicinity of a portion where the band 14 is tightened by the bolt 15 and the nut 16. The claw portion 24 is formed to have a higher frictional force with the contact surface of the insertion port 3 than other portions on the inner peripheral surface of the band 14.

図4に示すように、バンド14をその軸直交断面において中心Oを通る直線Lで2つの領域に分けた場合の、その一方の領域(図4において直線Lの下方の領域)を「第1領域」といい、他方の領域(図4において直線Lの上方の領域)を「第2領域」という。爪部24、推進力伝達手段13A、13Bは、バンド14の第1領域に設けられており、推進力伝達手段13Cは、バンド14の第2領域に設けられている。なお、推進力伝達手段13Cは、第2領域における他の位置に設けることとしてもよい。図4では直線Lを水平に設定しているが、爪部24を除いた領域と区分するのであれば、水平から角度のついた状態で領域を分けてもよい。 As shown in FIG. 4, when the band 14 is divided into two regions by a straight line L passing through the center O in its axially orthogonal cross section, one of the regions (the region below the straight line L in FIG. 4) is "first. The other region (the region above the straight line L in FIG. 4) is referred to as a “region” and is referred to as a “second region”. The claw portion 24 and the propulsive force transmitting means 13A and 13B are provided in the first region of the band 14, and the propulsive force transmitting means 13C is provided in the second region of the band 14. The propulsive force transmitting means 13C may be provided at another position in the second region. In FIG. 4, the straight line L is set horizontally, but if it is divided into the region excluding the claw portion 24, the region may be divided in a state of being angled from the horizontal.

推進力伝達手段13は、先行管2の受け口1の端面1aに当接し、後行管5の押し込み力を先行管2に伝達する推進力伝達部材17と、締め付け手段12の外周面に固定されたブラケット18と、さや管(図示しない)内において後行管5を支持する支持部材としての車輪20と、車輪20をブラケット18に回転可能に固定する、一端がブラケット18に取り付けられた固定軸21とからなっている。推進力伝達部材17の先端部は、受け口1の端面1aと当接するように折れ曲がっている。 The propulsive force transmitting means 13 is fixed to the propulsive force transmitting member 17 that abuts on the end surface 1a of the receiving port 1 of the leading pipe 2 and transmits the pushing force of the trailing pipe 5 to the leading pipe 2 and the outer peripheral surface of the tightening means 12. A bracket 18 and a wheel 20 as a support member for supporting the trailing pipe 5 in a sheath pipe (not shown), and a fixed shaft having one end attached to the bracket 18 for rotatably fixing the wheel 20 to the bracket 18. It consists of 21. The tip of the propulsion force transmitting member 17 is bent so as to come into contact with the end surface 1a of the receiving port 1.

固定軸21は、ボルトからなり、固定軸21の他端は、推進力伝達部材17に形成された長孔17aの一方端に、ナット22により抜け出し不可に挿入されている。固定軸21の他端が挿入された長孔17aは、仕切壁23(図5参照)により仕切られ、これによって、固定軸21の他端は、推進力伝達部材17の長孔17aに保持されている。なお、仕切壁23は、推進力伝達部材17と一体に形成してもよいし、別体としてもよい。 The fixed shaft 21 is made of a bolt, and the other end of the fixed shaft 21 is inserted into one end of an elongated hole 17a formed in the propulsion force transmitting member 17 so as not to be pulled out by a nut 22. The elongated hole 17a into which the other end of the fixed shaft 21 is inserted is partitioned by a partition wall 23 (see FIG. 5), whereby the other end of the fixed shaft 21 is held by the elongated hole 17a of the propulsive force transmission member 17. ing. The partition wall 23 may be formed integrally with the propulsion force transmitting member 17, or may be a separate body.

後行管5の挿し口3は、その先端部に抜止め用突起4が形成されている。また、受け口1の内周面に形成されたロックリング用溝7(図5参照)内には、芯出し用リング8を介してロックリング6が嵌め込まれており、受け口1の内周面に形成されたゴム輪用溝10(図5参照)内には、ゴム輪9が嵌め込まれている。 The insertion port 3 of the trailing pipe 5 is formed with a retaining protrusion 4 at the tip thereof. Further, the lock ring 6 is fitted into the lock ring groove 7 (see FIG. 5) formed on the inner peripheral surface of the receiving port 1 via the centering ring 8 and is fitted on the inner peripheral surface of the receiving port 1. The rubber ring 9 is fitted in the formed rubber ring groove 10 (see FIG. 5).

次に、この発明の推進力伝達装置11を使用した推進敷設工法について説明する。 Next, a propulsion laying method using the propulsion force transmission device 11 of the present invention will be described.

この発明の推進力伝達装置11を使用した推進敷設工法により管を接合するには、地上で後行管5の挿し口3に推進力伝達装置11を固定する。すなわち、締め付け手段12のバンド14をボルト15とナット16とにより締め付けて、推進力伝達装置11を挿し口3に固定する。 In order to join the pipes by the propulsion laying method using the propulsion force transmission device 11 of the present invention, the propulsion force transmission device 11 is fixed to the insertion port 3 of the trailing pipe 5 on the ground. That is, the band 14 of the tightening means 12 is tightened by the bolt 15 and the nut 16, and the propulsive force transmission device 11 is fixed to the insertion port 3.

推進力伝達装置11の固定位置は、挿し口3を受け口1に嵌め込んだときに、先行管2と後行管5との管接合部が伸縮可能となる位置で、推進力伝達手段13の先端部が受け口1の端面1aに当接する位置とする。 The fixed position of the propulsion force transmitting device 11 is a position where the pipe joint between the leading pipe 2 and the trailing pipe 5 can be expanded and contracted when the insertion port 3 is fitted into the receiving port 1, and the propulsive force transmitting means 13 The position where the tip portion abuts on the end surface 1a of the receiving port 1 is set.

地上で推進力伝達装置11を後行管5の挿し口3に固定したら、後行管5を地下に吊り下ろして、先行管2の受け口1に嵌め込む。これによって、先行管2と後行管5とが、管接合部に収縮代T1(図5参照)を維持した状態で接合される。 After fixing the propulsion force transmission device 11 to the insertion port 3 of the trailing pipe 5 on the ground, the trailing pipe 5 is hung underground and fitted into the receiving port 1 of the leading pipe 2. As a result, the leading pipe 2 and the trailing pipe 5 are joined in a state where the contraction allowance T1 (see FIG. 5) is maintained at the pipe joining portion.

次いで、油圧ジャッキ等を用いて後行管5をさや管内に押し込むと、推進力伝達手段13がその押し込む力(押し込み力)を先行管2に伝達し、後行管5、先行管2及びその先の管がさや管の奥に押し込まれる。 Next, when the trailing pipe 5 is pushed into the sheath pipe using a hydraulic jack or the like, the propulsion force transmitting means 13 transmits the pushing force (pushing force) to the leading pipe 2, and the trailing pipe 5, the leading pipe 2 and the leading pipe 2 thereof are transmitted. The tip tube is pushed into the back of the sheath tube.

そして、さや管内の管の数が増えていくと、押し込み力が上昇していく。ここで、従来の推進力伝達装置であれば、後行管5の押し込み力が上昇したときにボルト15とナット16の締め付け力が不足していると、推進力伝達装置と後行管5の挿し口3の外周面との間に滑りが生じ、推進が完了する前に、後行管5の挿し口3が先行管2の受け口1内に入り込んでしまうという問題があった。 Then, as the number of pipes in the sheath pipe increases, the pushing force increases. Here, in the case of the conventional propulsion force transmission device, if the tightening force of the bolt 15 and the nut 16 is insufficient when the pushing force of the trailing pipe 5 increases, the propulsion force transmission device and the trailing pipe 5 There is a problem that slippage occurs between the insertion port 3 and the outer peripheral surface of the insertion port 3, and the insertion port 3 of the trailing pipe 5 enters the receiving port 1 of the leading pipe 2 before the propulsion is completed.

しかしながら、第1実施形態の推進力伝達装置11は、バンド14の内周面に爪部24が形成されているとともに仕切壁23を有するため、押し込み力がかかった際にバンド14の取り付け姿勢が挿し口3に対して斜めに変化するだけで、バンド14と挿し口3の外周面との間に滑りは生じずに固定状態を維持する。以下、その流れについて図5及び図6の遷移図を用いて具体的に説明する。 However, since the propulsion force transmitting device 11 of the first embodiment has the claw portion 24 formed on the inner peripheral surface of the band 14 and the partition wall 23, the mounting posture of the band 14 is changed when a pushing force is applied. Only by changing diagonally with respect to the insertion port 3, the band 14 and the outer peripheral surface of the insertion port 3 do not slip and maintain a fixed state. Hereinafter, the flow will be specifically described with reference to the transition diagrams of FIGS. 5 and 6.

図5、図6(A)、(B)、(C)は、図4のα−α断面図である。図5は、後行管5に押し込み力(荷重)が掛かっていない初期状態(「第1段階」)を示している。 5 and 6 (A), (B), and (C) are α-α cross-sectional views of FIG. FIG. 5 shows an initial state (“first stage”) in which no pushing force (load) is applied to the trailing pipe 5.

第1段階から後行管5に対して押し込み力が掛かると、バンド14には押し込み力とは反対方向への力が働き、図6(A)に示すように、推進力伝達手段13A、13Cのそれぞれの仕切壁23が同様に変形する状態(「第2段階」)へと遷移する。 When a pushing force is applied to the trailing pipe 5 from the first stage, a force acting in the direction opposite to the pushing force acts on the band 14, and as shown in FIG. 6A, the propulsion force transmitting means 13A and 13C Transition to a state in which each of the partition walls 23 of the above is similarly deformed (“second stage”).

第2段階から後行管5に対して更に押し込み力が掛かり、所定の力を超えると、図6(B)、図6(C)に示すように、推進力伝達手段13Aの仕切壁23が、推進力伝達手段13Cの仕切壁23よりも大きく変形し、バンド14の取り付け姿勢が斜めに変化した状態(「第3段階」)へと遷移する。推進力伝達手段13Aの仕切壁23が、推進力伝達手段13Cの仕切壁23よりも大きく変形する理由は、爪部24が第1領域(図4参照)のみに設けられているため、同じ第1領域に設けられた推進力伝達手段13Aの方が、第2領域(図4参照)に設けられている推進力伝達手段13Cよりも大きな押し込み力を先行管2に伝達する(推進力伝達手段13Aの仕切壁23に掛かる力の方がより大きい)ためである。このように、第1実施形態に係る推進力伝達装置11によれば、押し込み力が上昇した場合であっても、バンド14の取り付け姿勢が斜めに変化するだけで、バンド14(推進力伝達装置11)と、挿し口3の外周面との間に滑りが生じることがない。なお、図6(A)、(B)に示すように、仕切壁23が変形した分だけ、バンド14(ブラケット18)の端面(管の後方側の端面)と、推進力伝達部材17の端面(管の後方側の端面)は、二つの面の間に段差が無くフラットな当初の状態(図5参照)から二つの面がずれた状態となる。 When a pushing force is further applied to the trailing pipe 5 from the second stage and exceeds a predetermined force, the partition wall 23 of the propulsive force transmitting means 13A is formed as shown in FIGS. 6 (B) and 6 (C). , It is deformed more than the partition wall 23 of the propulsion force transmitting means 13C, and transitions to a state in which the mounting posture of the band 14 is changed diagonally (“third stage”). The reason why the partition wall 23 of the propulsion force transmitting means 13A is deformed more than the partition wall 23 of the propulsion force transmitting means 13C is that the claw portion 24 is provided only in the first region (see FIG. 4). The propulsive force transmitting means 13A provided in the first region transmits a larger pushing force to the leading pipe 2 than the propulsive force transmitting means 13C provided in the second region (see FIG. 4) (propulsive force transmitting means). This is because the force applied to the partition wall 23 of 13A is larger). As described above, according to the propulsion force transmission device 11 according to the first embodiment, even when the pushing force is increased, the band 14 (propulsion force transmission device) is simply changed in the mounting posture of the band 14. No slippage occurs between 11) and the outer peripheral surface of the insertion port 3. As shown in FIGS. 6A and 6B, the end face of the band 14 (bracket 18) (the end face on the rear side of the pipe) and the end face of the propulsion force transmitting member 17 are due to the deformation of the partition wall 23. (End face on the rear side of the pipe) is a state in which the two faces are deviated from the initial flat state (see FIG. 5) with no step between the two faces.

以上説明したように、第1実施形態に係る推進力伝達装置11は、先行管2の受け口1に後行管5の挿し口3を嵌め込むことにより接合した管を、順次、さや管内に押し込んで、新設管をさや管内に敷設する推進敷設工法に使用され、挿し口3の外周面に固定される。また、推進力伝達装置11は、挿し口3の外周面に取り付けられるリング状のバンド14を含み、バンド14の推進力伝達手段13(「推進力伝達部」の一例)は、受け口1の端面1aに当接して、後行管5の押し込み力を先行管2に伝達し、爪部24(「摩擦力向上部」の一例)及び仕切壁23(「変形部」の一例)(爪部24及び仕切壁23は「姿勢変化手段」の一例)は、押し込み力が所定の力を超えた場合に、バンド14の取り付け姿勢を変化させる。 As described above, in the propulsion force transmission device 11 according to the first embodiment, the pipes joined by fitting the insertion port 3 of the trailing pipe 5 into the receiving port 1 of the leading pipe 2 are sequentially pushed into the sheath pipe. Therefore, it is used in the propulsion laying method of laying a new pipe in the sheath pipe, and is fixed to the outer peripheral surface of the insertion port 3. Further, the propulsion force transmission device 11 includes a ring-shaped band 14 attached to the outer peripheral surface of the insertion port 3, and the propulsion force transmission means 13 (an example of the “propulsion force transmission unit”) of the band 14 is an end surface of the receiving port 1. In contact with 1a, the pushing force of the trailing pipe 5 is transmitted to the leading pipe 2, and the claw portion 24 (an example of the "friction force improving portion") and the partition wall 23 (an example of the "deformed portion") (the claw portion 24). The partition wall 23 (an example of the posture changing means) changes the mounting posture of the band 14 when the pushing force exceeds a predetermined force.

また、バンド14をその軸直交断面において中心Oを通る直線Lで2つの領域に分けた場合の、第1領域(「一方の領域」の一例)の内周面の少なくとも一部に形成された爪部24が、内周面における他の部分よりも挿し口3の接触面との摩擦力を高くし、推進力伝達手段13に形成された仕切壁23が、押し込み力が所定の力を超えた場合に変形することにより、押し込み力が所定の力を超えた場合に、バンド14の取り付け姿勢を変化させる。 Further, the band 14 is formed on at least a part of the inner peripheral surface of the first region (an example of "one region") when the band 14 is divided into two regions by a straight line L passing through the center O in its axis orthogonal cross section. The claw portion 24 has a higher frictional force with the contact surface of the insertion port 3 than other portions on the inner peripheral surface, and the partition wall 23 formed in the propulsion force transmitting means 13 has a pushing force exceeding a predetermined force. By deforming the band 14, the mounting posture of the band 14 is changed when the pushing force exceeds a predetermined force.

したがって、第1実施形態に係る推進力伝達装置11によれば、後行管5への後方からの押し込み力が大きくなり所定の力を超えた場合に、バンド14の取り付け姿勢が斜めに変化するため、推進途中でバンド14(推進力伝達装置11)と、後行管5の挿し口3の外周面との間に滑りが生じることがない。 Therefore, according to the propulsion force transmitting device 11 according to the first embodiment, when the pushing force from the rear to the trailing pipe 5 becomes large and exceeds a predetermined force, the mounting posture of the band 14 changes diagonally. Therefore, slip does not occur between the band 14 (propulsion force transmission device 11) and the outer peripheral surface of the insertion port 3 of the trailing pipe 5 during propulsion.

[第2実施形態]
次に、この発明の推進敷設工法用推進力伝達装置の第2実施態様を、図面を参照しながら説明する。なお、第2実施形態の説明では、第1実施形態と同様の部材については同一の符号を用いて説明を省略する。
[Second Embodiment]
Next, a second embodiment of the propulsion force transmission device for the propulsion laying method of the present invention will be described with reference to the drawings. In the description of the second embodiment, the same reference numerals are used for the same members as those of the first embodiment, and the description thereof will be omitted.

図7は、第2実施形態に係る推進力伝達装置を示す斜視図、図8(A)は、第2実施形態に係る推進力伝達装置を装着した管接合部を示す、初期状態(第1段階)の断面図、図8(B)は、第2実施形態に係る推進力伝達装置を装着した管接合部を示す、第2段階の断面図、図8(C)は、第2実施形態に係る推進力伝達装置を装着した管接合部を示す、第3段階の断面図である。 FIG. 7 is a perspective view showing the propulsion force transmission device according to the second embodiment, and FIG. 8A shows a pipe joint portion equipped with the propulsion force transmission device according to the second embodiment, which is an initial state (first). A cross-sectional view of the second stage, FIG. 8 (B) shows a pipe joint equipped with the propulsive force transmission device according to the second embodiment, and FIG. 8 (C) is a cross-sectional view of the second stage of the second embodiment. It is sectional drawing of the 3rd stage which shows the pipe joint part which attached the propulsion force transmission device which concerns on.

図7に示すように、第2実施形態に係る推進力伝達装置11は、3つの推進力伝達手段13A、13B、13Cを有しており、第2領域(図4参照)に設けられている推進力伝達手段13Cにおける推進力伝達部材17Cの長手方向の長さが、第1領域(図4参照)に設けられている推進力伝達手段13A、13Bにおける推進力伝達部材17A、17Bの長手方向の長さよりも長くなっている。 As shown in FIG. 7, the propulsion force transmission device 11 according to the second embodiment has three propulsion force transmission means 13A, 13B, and 13C, and is provided in the second region (see FIG. 4). The length of the propulsive force transmitting member 17C in the propulsive force transmitting means 13C in the longitudinal direction is the longitudinal direction of the propulsive force transmitting members 17A and 17B in the propulsive force transmitting means 13A and 13B provided in the first region (see FIG. 4). It is longer than the length of.

第2実施形態に係る推進力伝達装置11の固定位置は、挿し口3を受け口1に嵌め込んだときに、先行管2と後行管5との管接合部が伸縮可能となる位置で、推進力伝達手段13Cの先端部が受け口1の端面1aに当接する位置とする。 The fixed position of the propulsion force transmission device 11 according to the second embodiment is a position where the pipe joint between the leading pipe 2 and the trailing pipe 5 can be expanded and contracted when the insertion port 3 is fitted into the receiving port 1. The position is such that the tip end portion of the propulsion force transmitting means 13C abuts on the end surface 1a of the receiving port 1.

第2実施形態に係る推進力伝達装置11は、バンド14の内周面に爪部24が形成されているとともに、推進力伝達部材17Cの長手方向の長さが、推進力伝達部材17A、17Bの長手方向の長さよりも長いため、バンド14が推進中に滑りそうになってもバンド14の取り付け姿勢が挿し口3に対して斜めに変化するだけで、バンド14と、挿し口3の外周面との間に滑りが生じることはない。以下、その流れについて図8の遷移図を用いて具体的に説明する。 In the propulsion force transmission device 11 according to the second embodiment, the claw portion 24 is formed on the inner peripheral surface of the band 14, and the length of the propulsion force transmission member 17C in the longitudinal direction is the propulsion force transmission members 17A and 17B. Since it is longer than the length in the longitudinal direction of the band 14, even if the band 14 is about to slip during propulsion, the mounting posture of the band 14 only changes diagonally with respect to the insertion port 3, and the band 14 and the outer circumference of the insertion port 3 are changed. There is no slippage with the surface. Hereinafter, the flow will be specifically described with reference to the transition diagram of FIG.

図8(A)、(B)、(C)は、第2実施形態に係る推進力伝達装置11のα−α断面図(図4参照)である。図8(A)は、後行管5に押し込み力(荷重)が掛かっていない初期状態(「第1段階」)を示している。第1段階では、推進力伝達部材17Cの長さが、推進力伝達部材17Aの長さよりも長いため、推進力伝達部材17Cが先行管2の受け口1の端面1aに当接するのに対して、推進力伝達部材17Aは先行管2の受け口1の端面1aに当接せず、両者の間に隙間Gが空いている。 8 (A), (B), and (C) are α-α cross-sectional views (see FIG. 4) of the propulsion force transmitting device 11 according to the second embodiment. FIG. 8A shows an initial state (“first stage”) in which no pushing force (load) is applied to the trailing pipe 5. In the first stage, since the length of the propulsion force transmission member 17C is longer than the length of the propulsion force transmission member 17A, the propulsion force transmission member 17C comes into contact with the end surface 1a of the receiving port 1 of the leading pipe 2. The propulsive force transmitting member 17A does not abut on the end surface 1a of the receiving port 1 of the leading pipe 2, and there is a gap G between the two.

第1段階から後行管5に押し込み力が掛かると、まずは、推進力伝達部材17Cのみが先行管2の端面1aに当接して押し込み力により先行管2をさや管内に押し込む。そして、後行管5に押し込み力が更に掛かると、推進力伝達部材17Aが、受け口1の端面1aに当接していないため、図8(B)に示すように、バンド14の取り付け姿勢が斜めに変化し、推進力伝達部材17Cと、推進力伝達部材17A(17B)の双方が、先行管2の受け口1の端面1aに当接する状態(「第2段階」)に遷移する。そして、3つの推進力伝達部材17A、17B、17Cが先行管2の端面1aに当接して押し込み力により先行管2をさや管内に押し込む。 When a pushing force is applied to the trailing pipe 5 from the first stage, first, only the propulsive force transmitting member 17C abuts on the end surface 1a of the leading pipe 2 and pushes the leading pipe 2 into the sheath pipe by the pushing force. Then, when a pushing force is further applied to the trailing pipe 5, the propulsive force transmitting member 17A does not abut on the end surface 1a of the receiving port 1, so that the band 14 is attached in an oblique posture as shown in FIG. 8B. The transition to a state in which both the propulsion force transmission member 17C and the propulsion force transmission member 17A (17B) are in contact with the end surface 1a of the receiving port 1 of the leading pipe 2 (“second stage”). Then, the three propulsive force transmitting members 17A, 17B, and 17C come into contact with the end surface 1a of the leading pipe 2 and push the leading pipe 2 into the sheath pipe by the pushing force.

第2段階から後行管5に対して更に押し込み力が掛かると、図8(C)に示すように、推進力伝達手段13Aの仕切壁23が、推進力伝達手段13Cの仕切壁23よりも変形し、バンド14の取り付け姿勢が更に斜めに変化した状態(「第3段階」)へと遷移する。推進力伝達手段13Aの仕切壁23が、推進力伝達手段13Cの仕切壁23よりも大きく変形する理由は、爪部24が第1領域(図4参照)のみに設けられているため、同じ第1領域に設けられた推進力伝達手段13Aの方が、第2領域(図4参照)に設けられている推進力伝達手段13Cよりも大きな押し込み力を先行管2に伝達する(推進力伝達手段13Aの仕切壁23に掛かる力の方がより大きい)ためである。このように、第2実施形態に係る推進力伝達装置11によれば、押し込み力が上昇した場合であっても、バンド14の取り付け姿勢が斜めに変化するだけで、バンド14(推進力伝達装置11)が推進中に滑ることがない。なお、第2段階で既にバンド14の取り付け姿勢が斜め変化しているため、押し込み力がそれほど過大ではない場合には第3段階まで姿勢が変化することなく推進が可能である。 When a further pushing force is applied to the trailing pipe 5 from the second stage, as shown in FIG. 8C, the partition wall 23 of the propulsion force transmitting means 13A is larger than the partition wall 23 of the propulsion force transmitting means 13C. It is deformed and transitions to a state in which the mounting posture of the band 14 is further changed diagonally (“third stage”). The reason why the partition wall 23 of the propulsion force transmitting means 13A is deformed more than the partition wall 23 of the propulsion force transmitting means 13C is that the claw portion 24 is provided only in the first region (see FIG. 4). The propulsive force transmitting means 13A provided in the first region transmits a larger pushing force to the leading pipe 2 than the propulsive force transmitting means 13C provided in the second region (see FIG. 4) (propulsive force transmitting means). This is because the force applied to the partition wall 23 of 13A is larger). As described above, according to the propulsion force transmission device 11 according to the second embodiment, even when the pushing force is increased, the band 14 (propulsion force transmission device) is simply changed in the mounting posture of the band 14. 11) does not slip during propulsion. Since the mounting posture of the band 14 has already changed diagonally in the second stage, if the pushing force is not so excessive, the band 14 can be propelled without changing the posture until the third stage.

以上説明したように、第2実施形態に係る推進力伝達装置11は、挿し口3の外周面に取り付けられるリング状のバンド14を含み、バンド14の推進力伝達手段13(「推進力伝達部」の一例)は、受け口1の端面1aに当接して、後行管5の押し込み力を先行管2に伝達し、爪部24(「摩擦力向上部」の一例)及び推進力伝達部材17C(「第1当接部」の一例)(爪部24及び推進力伝達部材17Cは「姿勢変化手段」の一例)は、押し込み力が所定の力を超えた場合に、バンド14の取り付け姿勢を変化させる。 As described above, the propulsion force transmission device 11 according to the second embodiment includes a ring-shaped band 14 attached to the outer peripheral surface of the insertion port 3, and the propulsion force transmission means 13 of the band 14 (“propulsion force transmission unit”). 1) abuts on the end surface 1a of the receiving port 1 and transmits the pushing force of the trailing pipe 5 to the leading pipe 2, and the claw portion 24 (an example of the “friction force improving portion”) and the propulsive force transmitting member 17C. (An example of the "first contact portion") (The claw portion 24 and the propulsive force transmitting member 17C are an example of the "posture changing means"), when the pushing force exceeds a predetermined force, the band 14 is attached. Change.

また、バンド14をその軸直交断面において中心Oを通る直線Lで2つの領域に分けた場合の、第1領域(「一方の領域」の一例)の内周面の少なくとも一部に形成された爪部24が、内周面における他の部分よりも挿し口3の接触面との摩擦力を高くし、第2領域(「他方の領域」の一例)に位置する推進力伝達部材17Cが、受け口1の端面1aに最初に当接することにより、押し込み力が所定の力を超えた場合に、バンド14の取り付け姿勢を変化させる。 Further, the band 14 is formed on at least a part of the inner peripheral surface of the first region (an example of "one region") when the band 14 is divided into two regions by a straight line L passing through the center O in its axis orthogonal cross section. The claw portion 24 has a higher frictional force with the contact surface of the insertion port 3 than the other portion on the inner peripheral surface, and the propulsion force transmitting member 17C located in the second region (an example of the “other region”) By first contacting the end surface 1a of the receiving port 1, the mounting posture of the band 14 is changed when the pushing force exceeds a predetermined force.

したがって、第2実施形態に係る推進力伝達装置11によれば、後行管5への後方からの押し込み力が大きくなり所定の力を超えた場合に、バンド14の取り付け姿勢が斜めに変化するため、バンド14と、後行管5の挿し口3の外周面との間に滑りが生じることがない。 Therefore, according to the propulsion force transmitting device 11 according to the second embodiment, when the pushing force from the rear to the trailing pipe 5 becomes large and exceeds a predetermined force, the mounting posture of the band 14 changes diagonally. Therefore, slip does not occur between the band 14 and the outer peripheral surface of the insertion port 3 of the trailing pipe 5.

[第3実施形態]
次に、この発明の推進敷設工法用推進力伝達装置の第3実施態様を、図面を参照しながら説明する。なお、第3実施形態の説明では、第1実施形態と同様の部材については同一の符号を用いて説明を省略する。
[Third Embodiment]
Next, a third embodiment of the propulsion force transmission device for the propulsion laying method of the present invention will be described with reference to the drawings. In the description of the third embodiment, the same reference numerals are used for the same members as those of the first embodiment, and the description thereof will be omitted.

図9(A)は、第3実施形態に係る推進力伝達装置を示す斜視図、図9(B)は、第3実施形態に係る推進力伝達装置の断面図、図10(A)は、第3実施形態に係る推進力伝達装置を装着した管接合部を示す、初期状態(第1段階)の断面図、図10(B)は、第3実施形態に係る推進力伝達装置を装着した管接合部を示す、第2段階の断面図、図10(C)は、第3実施形態に係る推進力伝達装置を装着した管接合部を示す、第3段階の断面図である。 9 (A) is a perspective view showing the propulsive force transmission device according to the third embodiment, FIG. 9 (B) is a sectional view of the propulsive force transmission device according to the third embodiment, and FIG. 10 (A) is a sectional view. The cross-sectional view of the initial state (first stage) showing the pipe joint to which the propulsive force transmitting device according to the third embodiment is attached, FIG. 10B is attached to the propulsive force transmitting device according to the third embodiment. FIG. 10 (C), a cross-sectional view of the second stage showing the pipe joint, is a cross-sectional view of the third stage showing the pipe joint equipped with the propulsive force transmission device according to the third embodiment.

図9(A)に示すように、第3実施形態に係る推進力伝達装置11は、後行管5の挿し口3の外周面に装着されるリング状の締め付け手段12を有している。バンド14の一方の端面には突起部31が形成されている。バンド14の一方の端面は、先行管2の受け口1の端面1aに当接して、後行管5の押し込み力を先行管2に伝達する。 As shown in FIG. 9A, the propulsion force transmission device 11 according to the third embodiment has a ring-shaped tightening means 12 mounted on the outer peripheral surface of the insertion port 3 of the trailing pipe 5. A protrusion 31 is formed on one end surface of the band 14. One end surface of the band 14 comes into contact with the end surface 1a of the receiving port 1 of the leading pipe 2 and transmits the pushing force of the trailing pipe 5 to the leading pipe 2.

図9(B)に示すように、バンド14をその軸直交断面において中心Oを通る直線Lで2つの領域に分けた場合の、その一方の領域(図9(B)において直線Lの下方の領域)を「第1領域」といい、他方の領域(図9(B)において直線Lの上方の領域)を「第2領域」という。爪部24は、バンド14の第1領域に設けられており、突起部31はバンド14の第2領域に形成されている。 As shown in FIG. 9B, when the band 14 is divided into two regions by a straight line L passing through the center O in its axis orthogonal cross section, one of the regions (in FIG. 9B, below the straight line L). The region) is referred to as a "first region", and the other region (the region above the straight line L in FIG. 9B) is referred to as a "second region". The claw portion 24 is provided in the first region of the band 14, and the protrusion 31 is formed in the second region of the band 14.

第3実施形態に係る推進力伝達装置11の固定位置は、挿し口3を受け口1に嵌め込んだときに、バンド14の突起部31が受け口1の端面1aに当接する位置とする。 The fixed position of the propulsion force transmitting device 11 according to the third embodiment is a position where the protrusion 31 of the band 14 comes into contact with the end surface 1a of the receiving port 1 when the insertion port 3 is fitted into the receiving port 1.

第3実施形態に係る推進力伝達装置11は、バンド14の内周面に爪部24が形成されているとともに、バンド14に突起部31が形成されているため、バンド14が滑りそうになってもバンド14の取り付け姿勢が挿し口3に対して斜めに変化するだけで、バンド14と、挿し口3の外周面との間に滑りが生じることはない。以下、その流れについて図10の遷移図を用いて具体的に説明する。 In the propulsion force transmitting device 11 according to the third embodiment, since the claw portion 24 is formed on the inner peripheral surface of the band 14 and the protrusion portion 31 is formed on the band 14, the band 14 is likely to slip. However, the mounting posture of the band 14 only changes obliquely with respect to the insertion port 3, and slip does not occur between the band 14 and the outer peripheral surface of the insertion port 3. Hereinafter, the flow will be specifically described with reference to the transition diagram of FIG.

図10(A)、(B)、(C)は、第3実施形態に係る推進力伝達装置11のβ−β断面図(図9(B)参照)である。図10(A)は、後行管5に押し込み力(荷重)が掛かっていない初期状態(「第1段階」)を示している。第1段階では、バンド14の突起部31がバンド14の端面から突起しているため、突起部31が先行管2の受け口1の端面1aに当接するのに対して、バンド14の端面(突起部31を除く)は先行管2の受け口1の端面1aに当接せず、両者の間に隙間Gが空いている。 10 (A), (B), and (C) are β-β cross-sectional views (see FIG. 9 (B)) of the propulsion force transmitting device 11 according to the third embodiment. FIG. 10A shows an initial state (“first stage”) in which no pushing force (load) is applied to the trailing pipe 5. In the first stage, since the protrusion 31 of the band 14 protrudes from the end face of the band 14, the protrusion 31 abuts on the end face 1a of the receiving port 1 of the leading pipe 2, whereas the end face (protrusion) of the band 14 The portion 31) does not abut on the end surface 1a of the receiving port 1 of the leading pipe 2, and there is a gap G between the two.

第1段階から後行管5に押し込み力が掛かると、まずは、バンド14の突起部31のみが先行管2の端面1aに当接して押し込み力により先行管2をさや管内に押し込む。そして、後行管5に押し込み力が更に掛かると、バンド14の爪部24近傍の端面が受け口1の端面1aに当接していないため、図10(B)に示すように、バンド14の取り付け姿勢が斜めに変化し、バンド14の端面(突起部31を除く)と受け口1の端面1aの間の隙間Gが狭くなる状態(「第2段階」)に遷移する。 When a pushing force is applied to the trailing pipe 5 from the first stage, first, only the protrusion 31 of the band 14 comes into contact with the end surface 1a of the leading pipe 2 and pushes the leading pipe 2 into the sheath pipe by the pushing force. Then, when a pushing force is further applied to the trailing pipe 5, the end surface in the vicinity of the claw portion 24 of the band 14 does not abut on the end surface 1a of the receiving port 1, so that the band 14 is attached as shown in FIG. 10 (B). The posture changes obliquely, and the state transitions to a state in which the gap G between the end surface of the band 14 (excluding the protrusion 31) and the end surface 1a of the receiving port 1 becomes narrower (“second stage”).

第2段階から後行管5に対して更に押し込み力が掛かると、図10(C)に示すように、バンド14の突起部31と、爪部24近傍の端面の双方が、先行管2の受け口1の端面1aに当接する状態(「第3段階」)に遷移する。そして、バンド14の突起部31とバンド14の端面が押し込み力により先行管2をさや管内に押し込む。このようにバンド14の取り付け姿勢が第2段階より斜めに変化するのは、爪部24が設けられていない突起部31側(図10(C)の上側)の方が挿し口3との間で働く摩擦力が低く滑るためである。このように、第3実施形態に係る推進力伝達装置11によれば、押し込み力が上昇した場合であっても、バンド14の取り付け姿勢が斜めに変化するだけで、推進中にバンド14(推進力伝達装置11)と、挿し口3の外周面との間に滑りが生じることがない。なお、この第3実施形態も第2実施形態同様、第2段階で既にバンド14の取り付け姿勢が斜め変化しているため、押し込み力がそれほど過大ではない場合には第3段階まで姿勢が変化することなく推進が可能である。 When a further pushing force is applied to the trailing pipe 5 from the second stage, as shown in FIG. 10C, both the protrusion 31 of the band 14 and the end face near the claw portion 24 of the leading pipe 2 The state transitions to a state of being in contact with the end surface 1a of the receiving port 1 (“third stage”). Then, the protrusion 31 of the band 14 and the end surface of the band 14 push the leading pipe 2 into the sheath pipe by a pushing force. In this way, the attachment posture of the band 14 changes diagonally from the second stage on the side of the protrusion 31 (upper side of FIG. 10C) where the claw portion 24 is not provided, between the insertion port 3 and the insertion port 3. This is because the frictional force acting on the machine is low and it slides. As described above, according to the propulsion force transmitting device 11 according to the third embodiment, even when the pushing force is increased, the band 14 (propulsion) is simply changed in the mounting posture of the band 14 during propulsion. No slip occurs between the force transmission device 11) and the outer peripheral surface of the insertion port 3. As in the second embodiment, the attachment posture of the band 14 has already changed diagonally in the second stage in the third embodiment, so that the posture changes up to the third stage when the pushing force is not so excessive. It can be promoted without any problems.

以上説明したように、第3実施形態に係る推進力伝達装置11は、挿し口3の外周面に取り付けられるリング状のバンド14を含み、バンド14の端面(「推進力伝達部」の一例)は、受け口1の端面1aに当接して、後行管5の押し込み力を先行管2に伝達し、爪部24(「摩擦力向上部」の一例)及びバンド14の端面に形成された突起部31(「第1当接部」の一例)(爪部24及び突起部31は「姿勢変化手段」の一例)は、押し込み力が所定の力を超えた場合に、バンド14の取り付け姿勢を変化させる。 As described above, the propulsion force transmission device 11 according to the third embodiment includes a ring-shaped band 14 attached to the outer peripheral surface of the insertion port 3, and is an end surface of the band 14 (an example of the "propulsion force transmission unit"). Is in contact with the end face 1a of the receiving port 1 and transmits the pushing force of the trailing pipe 5 to the leading pipe 2, and the protrusions formed on the claw portion 24 (an example of the "friction force improving portion") and the end faces of the band 14. The portion 31 (an example of the "first contact portion") (the claw portion 24 and the protrusion 31 are an example of the "posture changing means") changes the attachment posture of the band 14 when the pushing force exceeds a predetermined force. Change.

また、バンド14をその軸直交断面において中心Oを通る直線Lで2つの領域に分けた場合の、第1領域(「一方の領域」の一例)の内周面の少なくとも一部に形成された爪部24が、内周面における他の部分よりも挿し口3の接触面との摩擦力を高くし、第2領域(「他方の領域」の一例)に位置し、バンド14の軸方向に突出している突起部31が、受け口1の端面1aに最初に当接することにより、押し込み力が所定の力を超えた場合に、バンド14の取り付け姿勢を変化させる。 Further, the band 14 is formed on at least a part of the inner peripheral surface of the first region (an example of "one region") when the band 14 is divided into two regions by a straight line L passing through the center O in its axis orthogonal cross section. The claw portion 24 has a higher frictional force with the contact surface of the insertion port 3 than the other portion on the inner peripheral surface, is located in the second region (an example of the “other region”), and is located in the axial direction of the band 14. The protruding protrusion 31 first comes into contact with the end surface 1a of the receiving port 1, so that the mounting posture of the band 14 is changed when the pushing force exceeds a predetermined force.

したがって、第3実施形態に係る推進力伝達装置11によれば、後行管5への後方からの押し込み力が大きくなり所定の力を超えた場合に、バンド14の取り付け姿勢が斜めに変化するため、バンド14と、後行管5の挿し口3の外周面との間に滑りが生じることがない。 Therefore, according to the propulsion force transmitting device 11 according to the third embodiment, when the pushing force from the rear to the trailing pipe 5 becomes large and exceeds a predetermined force, the mounting posture of the band 14 changes diagonally. Therefore, slip does not occur between the band 14 and the outer peripheral surface of the insertion port 3 of the trailing pipe 5.

[第4実施形態]
次に、この発明の推進敷設工法用推進力伝達装置の第4実施態様を、図面を参照しながら説明する。なお、第4実施形態の説明では、第1実施形態と同様の部材については同一の符号を用いて説明を省略する。
[Fourth Embodiment]
Next, a fourth embodiment of the propulsion force transmission device for the propulsion laying method of the present invention will be described with reference to the drawings. In the description of the fourth embodiment, the same reference numerals are used for the same members as those of the first embodiment, and the description thereof will be omitted.

図11(A)は、第4実施形態に係る推進力伝達装置を示す部分断面斜視図、図11(B)は、第4実施形態に係る推進力伝達装置の断面図、図12(A)は、第4実施形態に係る推進力伝達装置を装着した管接合部を示す、初期状態(第1段階)の断面図、図12(B)は、第4実施形態に係る推進力伝達装置を装着した管接合部を示す、第2段階の断面図、図12(C)は、第4実施形態に係る推進力伝達装置を装着した管接合部を示す、第3段階の断面図である。 11 (A) is a partial cross-sectional perspective view showing the propulsive force transmitting device according to the fourth embodiment, and FIG. 11 (B) is a sectional view of the propulsive force transmitting device according to the fourth embodiment, FIG. 12 (A). Is a cross-sectional view in an initial state (first stage) showing a pipe joint equipped with the propulsion force transmission device according to the fourth embodiment, and FIG. 12 (B) shows the propulsion force transmission device according to the fourth embodiment. A second-stage cross-sectional view showing the mounted pipe joint, FIG. 12C is a third-stage cross-sectional view showing the pipe joint equipped with the propulsive force transmission device according to the fourth embodiment.

図11(A)に示すように、第4実施形態に係る推進力伝達装置11は、後行管5の挿し口3の外周面に装着されるリング状の締め付け手段12を有している。バンド14は、挿し口3の外周面に装着されるリング状のバンド本体14aを含み、バンド本体14aの一方の縁部には外周方向に立ち上がる支え壁14bが形成されている。また、バンド本体14aの外周面には推進力伝達部材32がリング状に設けられている。推進力伝達部材32は、支え壁14bに当接しつつ、バンド本体14aの他方の縁部からはみ出すように設けられている。 As shown in FIG. 11A, the propulsion force transmission device 11 according to the fourth embodiment has a ring-shaped tightening means 12 mounted on the outer peripheral surface of the insertion port 3 of the trailing pipe 5. The band 14 includes a ring-shaped band body 14a mounted on the outer peripheral surface of the insertion port 3, and a support wall 14b rising in the outer peripheral direction is formed on one edge of the band body 14a. Further, a propulsive force transmitting member 32 is provided in a ring shape on the outer peripheral surface of the band body 14a. The propulsion force transmitting member 32 is provided so as to protrude from the other edge portion of the band main body 14a while being in contact with the support wall 14b.

推進力伝達部材32は、先行管2の受け口1の端面1aに当接して、後行管5の押し込み力を先行管2に伝達する。推進力伝達部材32は、押し込み力が所定の力を超えない場合には変形せず(押し潰されず)、後行管5の押し込み力を先行管2に伝達し、押し込み力が所定の力を超えた場合には変形する(押し潰される)材料からなっている。 The propulsion force transmission member 32 abuts on the end surface 1a of the receiving port 1 of the leading pipe 2 and transmits the pushing force of the trailing pipe 5 to the leading pipe 2. The propulsion force transmitting member 32 does not deform (is not crushed) when the pushing force does not exceed a predetermined force, transmits the pushing force of the trailing pipe 5 to the leading pipe 2, and the pushing force exerts a predetermined force. It is made of a material that deforms (crushes) when it exceeds it.

図11(B)に示すように、バンド14をその軸直交断面において中心Oを通る直線Lで2つの領域に分けた場合の、その一方の領域(図11(B)において直線Lの下方の領域)を「第1領域」といい、他方の領域(図11(B)において直線Lの上方の領域)を「第2領域」という。爪部24は、バンド14の第1領域に設けられており、推進力伝達部材32は第1領域及び第2領域にわたって設けられている。 As shown in FIG. 11 (B), when the band 14 is divided into two regions by a straight line L passing through the center O in its axis orthogonal cross section, one of the regions (in FIG. 11 (B), below the straight line L). The region) is referred to as a "first region", and the other region (the region above the straight line L in FIG. 11B) is referred to as a "second region". The claw portion 24 is provided in the first region of the band 14, and the propulsive force transmitting member 32 is provided over the first region and the second region.

第4実施形態に係る推進力伝達装置11は、バンド14の内周面に爪部24が形成されているとともに、推進力伝達部材32が、押し込み力が所定の力を超えた場合に変形するため、バンド14の取り付け姿勢が挿し口3に対して斜めに変化するだけで、バンド14と、挿し口3の外周面との間に滑りは生じない。以下、その流れについて図12の遷移図を用いて具体的に説明する。 In the propulsion force transmission device 11 according to the fourth embodiment, the claw portion 24 is formed on the inner peripheral surface of the band 14, and the propulsion force transmission member 32 is deformed when the pushing force exceeds a predetermined force. Therefore, the mounting posture of the band 14 only changes obliquely with respect to the insertion port 3, and slip does not occur between the band 14 and the outer peripheral surface of the insertion port 3. Hereinafter, the flow will be specifically described with reference to the transition diagram of FIG.

図12(A)、(B)、(C)は、第4実施形態に係る推進力伝達装置11のγ−γ断面図(図11(B)参照)である。図12(A)は、後行管5に押し込み力(荷重)が掛かっていない初期状態(「第1段階」)を示している。第1段階では、推進力伝達部材32が先行管2の受け口1の端面1aに当接する。 12 (A), 12 (B), and 12 (C) are γ-γ cross-sectional views (see FIG. 11 (B)) of the propulsion force transmitting device 11 according to the fourth embodiment. FIG. 12A shows an initial state (“first stage”) in which no pushing force (load) is applied to the trailing pipe 5. In the first stage, the propulsive force transmission member 32 comes into contact with the end surface 1a of the receiving port 1 of the leading pipe 2.

第1段階から後行管5に押し込み力が掛かると、後行管5の押し込み力により先行管2をさや管内に押し込む。そして、後行管5の押し込み力が第1の所定の力を超えると、図12(B)に示すように、推進力伝達部材32の第1領域に対応する部分及び第2領域に対応する部分が均等に変形する状態(「第2段階」)に遷移する。 When a pushing force is applied to the trailing pipe 5 from the first stage, the leading pipe 2 is pushed into the sheath pipe by the pushing force of the trailing pipe 5. Then, when the pushing force of the trailing pipe 5 exceeds the first predetermined force, as shown in FIG. 12B, it corresponds to the portion corresponding to the first region and the second region of the propulsion force transmitting member 32. The transition to a state in which the portion is uniformly deformed (“second stage”).

第2段階から後行管5に対して更に押し込み力が掛かり、第2の所定の力を超えると、図10(C)に示すように、推進力伝達部材32の第1領域に対応する部分が、第2領域に対応する部分よりも大きく変形し、バンド14の取り付け姿勢が斜めに変化した状態(「第3段階」)へと遷移する。第1領域に対応する部分が、第2領域に対応する部分よりも大きく変形する理由は、爪部24が第1領域のみに設けられているため、第1領域に対応する部分の方が、第2領域に対応する部分よりも大きな押し込み力を先行管2に伝達する(第1領域に対応する部分に掛かる力の方がより大きい)ためである。このように、第4実施形態に係る推進力伝達装置11によれば、押し込み力が上昇した場合であっても、バンド14の取り付け姿勢が斜めに変化するだけで、バンド14(推進力伝達装置11)と、挿し口3の外周面との間に滑りが生じることがない。 When a pushing force is further applied to the trailing pipe 5 from the second stage and exceeds the second predetermined force, as shown in FIG. 10C, the portion corresponding to the first region of the propulsion force transmitting member 32. However, it is deformed more than the portion corresponding to the second region, and transitions to a state in which the mounting posture of the band 14 is obliquely changed (“third stage”). The reason why the portion corresponding to the first region is deformed more than the portion corresponding to the second region is that the portion corresponding to the first region is more deformed because the claw portion 24 is provided only in the first region. This is because a larger pushing force than the portion corresponding to the second region is transmitted to the leading pipe 2 (the force applied to the portion corresponding to the first region is larger). As described above, according to the propulsion force transmission device 11 according to the fourth embodiment, even when the pushing force is increased, the band 14 (propulsion force transmission device) is simply changed in the mounting posture of the band 14. No slippage occurs between 11) and the outer peripheral surface of the insertion port 3.

以上説明したように、第4実施形態に係る推進力伝達装置11は、挿し口3の外周面に取り付けられるリング状のバンド14を含み、推進力伝達部材32(「推進力伝達部」の一例)は、受け口1の端面1aに当接して、後行管5の押し込み力を先行管2に伝達し、爪部24(「摩擦力向上部」の一例)及び推進力伝達部材32(爪部24及び推進力伝達部材32は「姿勢変化手段」の一例)は、押し込み力が第2の所定の力を超えた場合に、バンド14の取り付け姿勢を変化させる。 As described above, the propulsion force transmission device 11 according to the fourth embodiment includes a ring-shaped band 14 attached to the outer peripheral surface of the insertion port 3, and is an example of the propulsion force transmission member 32 (an example of the "propulsion force transmission unit"). ) Contact the end surface 1a of the receiving port 1 and transmit the pushing force of the trailing pipe 5 to the leading pipe 2, and the claw portion 24 (an example of the "friction force improving portion") and the propulsive force transmitting member 32 (claw portion). The 24 and the propulsive force transmitting member 32 (an example of the posture changing means) change the mounting posture of the band 14 when the pushing force exceeds the second predetermined force.

また、バンド14をその軸直交断面において中心Oを通る直線Lで2つの領域に分けた場合の、第1領域(「一方の領域」の一例)の内周面の少なくとも一部に形成された爪部24が、内周面における他の部分よりも挿し口3の接触面との摩擦力を高くし、推進力伝達部材32の第1領域に対応する部分が、押し込み力が第2の所定の力を超えた場合に、第2領域に対応する部分より大きく変形することにより、押し込み力が第2の所定の力を超えた場合に、バンド14の取り付け姿勢を変化させる。 Further, the band 14 is formed on at least a part of the inner peripheral surface of the first region (an example of "one region") when the band 14 is divided into two regions by a straight line L passing through the center O in its axis orthogonal cross section. The claw portion 24 has a higher frictional force with the contact surface of the insertion port 3 than the other portion on the inner peripheral surface, and the portion corresponding to the first region of the propulsion force transmitting member 32 has a second predetermined pushing force. When the force exceeds the second predetermined force, the band 14 is deformed more than the portion corresponding to the second region, so that the mounting posture of the band 14 is changed when the pushing force exceeds the second predetermined force.

したがって、第4実施形態に係る推進力伝達装置11によれば、後行管5への後方からの押し込み力が大きくなり第2の所定の力を超えた場合に、バンド14の取り付け姿勢が斜めに変化するため、推進中にバンド14と、後行管5の挿し口3の外周面との間に滑りが生じることがない。 Therefore, according to the propulsion force transmitting device 11 according to the fourth embodiment, when the pushing force from the rear to the trailing pipe 5 becomes large and exceeds the second predetermined force, the mounting posture of the band 14 is oblique. Therefore, there is no slippage between the band 14 and the outer peripheral surface of the insertion port 3 of the trailing pipe 5 during propulsion.

なお、上記実施形態では、爪部24をバンド14の内周面であって、ボルト15とナット16によってバンド14を締め付ける部分の近傍に形成することとしたが(図3、図4参照)、第1領域の他の位置に形成することとしてもよいし、その数も複数であってもよい。また、爪部24の代わりに、バンド14の内周面における他の部分よりも挿し口3の接触面との摩擦力を高くする素材や形状からなる摩擦力向上部を第1領域に配置することとしてもよい。また、推進完了後に地震等により推進時の押し込み力を超える過大な力が加わった際には、推進力伝達部材の一部が変形、破損、バンドが滑るなどして、受け口1内への挿し口3の押し込みを許容する。 In the above embodiment, the claw portion 24 is formed on the inner peripheral surface of the band 14 in the vicinity of the portion where the band 14 is tightened by the bolt 15 and the nut 16 (see FIGS. 3 and 4). It may be formed at another position in the first region, or the number may be plural. Further, instead of the claw portion 24, a friction force improving portion made of a material or a shape having a higher frictional force with the contact surface of the insertion port 3 than other portions on the inner peripheral surface of the band 14 is arranged in the first region. It may be that. In addition, when an excessive force exceeding the pushing force at the time of propulsion is applied after the completion of propulsion due to an earthquake or the like, a part of the propulsion force transmission member is deformed, damaged, the band slips, etc., and the propulsion force transmission member is inserted into the socket 1. Allows the mouth 3 to be pushed in.

上記各実施形態に係る推進力伝達装置11によれば、ボルト15とナット16により後行管5の外周面に締め付け固定されたバンド14が、当初の姿勢から斜めになることによってバンド14の周方向にさらなる引張力が生じることになる。この結果、引張力が、後行管5へのバンド14の固定力を向上させることによって、当初の姿勢よりも滑りにくい状態となる。 According to the propulsion force transmission device 11 according to each of the above embodiments, the band 14 tightened and fixed to the outer peripheral surface of the trailing pipe 5 by the bolt 15 and the nut 16 is inclined from the initial posture to the circumference of the band 14. Further tensile force will be generated in the direction. As a result, the tensile force improves the fixing force of the band 14 to the trailing pipe 5, so that the tension is less slippery than in the initial posture.

また、爪部24が後行管5に食い込むまで(バンド14が密着するまで)ボルト15とナット16の締め付けを行うことにより、部分的な形状での凹凸の嵌合関係が構築されるため、バンド14が斜めの姿勢になる状況を容易に作ることができる。これにより作業者によるボルト15とナット16の締め付け強度のばらつきを吸収することができる。 Further, by tightening the bolt 15 and the nut 16 until the claw portion 24 bites into the trailing pipe 5 (until the band 14 comes into close contact with each other), a fitting relationship of unevenness in a partial shape is established. It is possible to easily create a situation in which the band 14 is in an oblique position. As a result, it is possible to absorb variations in the tightening strength of the bolt 15 and the nut 16 due to the operator.

1:受け口
1a:端面
2:先行管
3:挿し口
4:抜け止め用突起
5:後行管
6:ロックリング
7:ロックリング用溝
8:芯出し用リング
9:ゴム輪
10:ゴム輪用溝
11:この発明の推進力伝達装置
12:締め付け手段
13:推進力伝達手段
14:バンド
15:ボルト
16:ナット
17:推進力伝達部材
17a:長孔
18:ブラケット
20:車輪
21:固定軸
22:ナット
23:仕切壁
24:爪部
31:突起部
32:推進力伝達部材
1: Receptacle 1a: End face 2: Preceding pipe 3: Insertion port 4: Protrusion for retaining 5: Trailing pipe 6: Lock ring 7: Groove for lock ring
8: Centering ring 9: Rubber ring 10: Rubber ring groove 11: Propulsion force transmission device of the present invention 12: Tightening means 13: Propulsion force transmission means 14: Band 15: Bolt 16: Nut 17: Propulsion force transmission member 17a: Long hole 18: Bracket 20: Wheel 21: Fixed shaft 22: Nut 23: Partition wall 24: Claw 31: Projection 32: Propulsion transmission member

Claims (10)

先行管の受け口に後行管の挿し口を嵌め込むことにより接合した管を、順次、さや管内に押し込んで、新設管を前記さや管内に敷設する推進敷設工法に使用され、前記挿し口の外周面に固定される推進敷設工法用推進力伝達装置であって、
前記挿し口の外周面に取り付けられるリング状のバンドを含み、
前記バンドは、
前記受け口の端面に当接して、前記後行管の押し込み力を前記先行管に伝達する推進力伝達部と、
前記押し込み力が所定の力を超えた場合に、前記バンドの取り付け姿勢を変化させる姿勢変化手段と、
を有することを特徴とする推進敷設工法用推進力伝達装置。
It is used in the propulsion laying method in which pipes joined by fitting the insertion port of the trailing pipe into the receiving port of the preceding pipe are sequentially pushed into the sheath pipe to lay the new pipe in the sheath pipe, and the outer circumference of the insertion port is used. It is a propulsion force transmission device for the propulsion laying method that is fixed to the surface.
Includes a ring-shaped band attached to the outer peripheral surface of the insertion slot.
The band
A propulsion force transmitting unit that abuts on the end face of the receiving port and transmits the pushing force of the trailing pipe to the leading pipe.
A posture changing means for changing the attachment posture of the band when the pushing force exceeds a predetermined force, and
Propulsion force transmission device for propulsion laying method, which is characterized by having.
前記姿勢変化手段は、
前記バンドをその軸直交断面において中心を通る直線で2つの領域に分けた場合の、その一方の領域の内周面の少なくとも一部に形成された、前記内周面における他の部分よりも前記挿し口の接触面との摩擦力を高くする摩擦力向上部と、
前記推進力伝達部に形成され、前記押し込み力が前記所定の力を超えた場合に変形する変形部と、
を有することを特徴とする請求項1に記載の推進敷設工法用推進力伝達装置。
The posture changing means
When the band is divided into two regions by a straight line passing through the center in the cross section orthogonal to the axis, the band is formed on at least a part of the inner peripheral surface of one region, and the band is more than the other portion on the inner peripheral surface. A friction force improving part that increases the frictional force with the contact surface of the insertion port,
A deformed portion formed in the propulsive force transmitting portion and deformed when the pushing force exceeds the predetermined force, and a deformed portion.
The propulsion force transmission device for the propulsion laying method according to claim 1, wherein the propulsion force transmission device is characterized by having.
前記姿勢変化手段は、
前記バンドをその軸直交断面において中心を通る直線で2つの領域に分けた場合の、その一方の領域の内周面の少なくとも一部に形成された、前記内周面における他の部分よりも前記挿し口の接触面との摩擦力を高くする摩擦力向上部を有し、
前記2つの領域の他方の領域に位置する前記推進力伝達部が、前記受け口の端面に最初に当接する第1当接部を有することを特徴とする請求項1に記載の推進敷設工法用推進力伝達装置。
The posture changing means
When the band is divided into two regions by a straight line passing through the center in the cross section orthogonal to the axis, the band is formed on at least a part of the inner peripheral surface of one region, and the band is more than the other portion on the inner peripheral surface. It has a friction force improving part that increases the frictional force with the contact surface of the insertion port.
The propulsion for the propulsion laying method according to claim 1, wherein the propulsive force transmitting portion located in the other region of the two regions has a first contact portion that first contacts the end surface of the socket. Power transmission device.
前記第1当接部は、前記バンドの端面から軸方向に突出していることを特徴とする請求項3に記載の推進敷設工法用推進力伝達装置。 The propulsion force transmission device for a propulsion laying method according to claim 3, wherein the first contact portion projects in the axial direction from an end surface of the band. 前記第1当接部は、前記バンドの外周面から軸方向に突出していることを特徴とする請求項3に記載の推進敷設工法用推進力伝達装置。 The propulsion force transmission device for a propulsion laying method according to claim 3, wherein the first contact portion projects in the axial direction from the outer peripheral surface of the band. 前記推進力伝達部は、
前記挿し口の外周面に沿って間隔をあけて配される複数個の推進力伝達手段からなり、
前記推進力伝達手段は、
前記受け口の端面に当接し、前記後行管の押し込み力を前記先行管に伝達する推進力伝達部材と、
前記バンドに固定されたブラケットと、
前記さや管内において前記後行管を支持する支持部材と、
前記支持部材を前記ブラケットに固定する、一端が前記ブラケットに取り付けられた固定軸と、
を有し、
前記推進力伝達部材には、前記バンドの軸方向に長い長孔が形成され、
前記長孔には、その一方端に前記固定軸を固定し、前記長孔を仕切る仕切壁が形成され、
前記固定軸の他端は、前記長孔の一方端に抜け出し不可に挿入され、
当該仕切壁が、前記変形部として機能することを特徴とする請求項2に記載の推進敷設工法用推進力伝達装置。
The propulsion force transmission unit
It consists of a plurality of propulsive force transmitting means arranged at intervals along the outer peripheral surface of the insertion port.
The propulsive force transmitting means
A propulsion force transmitting member that comes into contact with the end face of the receiving port and transmits the pushing force of the trailing pipe to the leading pipe.
With the bracket fixed to the band
A support member that supports the trailing pipe in the sheath pipe and
A fixed shaft having one end attached to the bracket, which fixes the support member to the bracket,
Have,
The propulsion force transmitting member is formed with elongated holes long in the axial direction of the band.
In the elongated hole, the fixed shaft is fixed to one end thereof, and a partition wall for partitioning the elongated hole is formed.
The other end of the fixed shaft is inserted into one end of the elongated hole so as not to come out.
The propulsion force transmission device for a propulsion laying method according to claim 2, wherein the partition wall functions as the deformed portion.
前記推進力伝達部は、
前記挿し口の外周面に沿って間隔をあけて配される複数個の推進力伝達手段からなり、
前記推進力伝達手段は、
前記受け口の端面に当接し、前記後行管の押し込み力を前記先行管に伝達する推進力伝達部材と、
前記バンドに固定されたブラケットと、
前記さや管内において前記後行管を支持する支持部材と、
前記支持部材を前記ブラケットに固定する、一端が前記ブラケットに取り付けられた固定軸と、
を有し、
前記推進力伝達部材には、前記バンドの軸方向に長い長孔が形成され、
前記長孔には、その一方端に前記固定軸を固定し、前記長孔を仕切る仕切壁が形成され、
前記固定軸の他端は、前記長孔の一方端に抜け出し不可に挿入され、
前記複数個の推進力伝達手段のうち、前記2つの領域の他方の領域に位置する推進力伝達手段が、前記第1当接部を有することを特徴とする請求項5に記載の推進敷設工法用推進力伝達装置。
The propulsion force transmission unit
It consists of a plurality of propulsive force transmitting means arranged at intervals along the outer peripheral surface of the insertion port.
The propulsive force transmitting means
A propulsion force transmitting member that comes into contact with the end face of the receiving port and transmits the pushing force of the trailing pipe to the leading pipe.
With the bracket fixed to the band
A support member that supports the trailing pipe in the sheath pipe and
A fixed shaft having one end attached to the bracket, which fixes the support member to the bracket,
Have,
The propulsion force transmitting member is formed with elongated holes long in the axial direction of the band.
In the elongated hole, the fixed shaft is fixed to one end thereof, and a partition wall for partitioning the elongated hole is formed.
The other end of the fixed shaft is inserted into one end of the elongated hole so as not to come out.
The propulsion laying method according to claim 5, wherein the propulsive force transmitting means located in the other region of the two regions among the plurality of propulsive force transmitting means has the first contact portion. For propulsion transmission device.
前記支持部材は、車輪からなることを特徴とする、請求項6又は7に記載の推進敷設工法用推進力伝達装置。 The propulsion force transmission device for a propulsion laying method according to claim 6 or 7, wherein the support member includes wheels. 前記推進力伝達部材の先端部は、前記受け口の前記端面と当接するように折れ曲がっていることを特徴とする、請求項6乃至8の何れか1項に記載の推進敷設工法用推進力伝達装置。 The propulsion force transmission device for a propulsion laying method according to any one of claims 6 to 8, wherein the tip end portion of the propulsion force transmission member is bent so as to come into contact with the end surface of the socket. .. 前記摩擦力向上部には突起が形成されていることを特徴とする、請求項2乃至9の何れか1項に記載の推進敷設工法用推進力伝達装置。 The propulsion force transmission device for a propulsion laying method according to any one of claims 2 to 9, wherein a protrusion is formed on the frictional force improving portion.
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JP2004316810A (en) * 2003-04-17 2004-11-11 Nippon Chutetsukan Kk Earthquake-proof tube propulsion construction method and propulsive force transmission device
JP2011032632A (en) * 2009-07-29 2011-02-17 Nippon Chutetsukan Kk Jacking force transmission device for pipe jacking and laying method
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Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5316352A (en) * 1991-12-16 1994-05-31 Smith Michael S Pipe coupling
JP2001099353A (en) * 1999-09-28 2001-04-10 Nishisaga Suido Kigyodan Sheath tube type advancing construction and thrust transmitting device thereof
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