JP6133762B2 - Flange joint reinforcement jig - Google Patents

Flange joint reinforcement jig Download PDF

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JP6133762B2
JP6133762B2 JP2013251322A JP2013251322A JP6133762B2 JP 6133762 B2 JP6133762 B2 JP 6133762B2 JP 2013251322 A JP2013251322 A JP 2013251322A JP 2013251322 A JP2013251322 A JP 2013251322A JP 6133762 B2 JP6133762 B2 JP 6133762B2
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flange
fitting portion
flange portions
pressing
advance
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JP2015108402A (en
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信夫 宗友
信夫 宗友
光信 矢野
光信 矢野
忍 安井
忍 安井
博教 佐々木
博教 佐々木
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Waterworks Technology Development Organization Co Ltd
Okayama City Office
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Waterworks Technology Development Organization Co Ltd
Okayama City Office
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Description

本発明は、ボルト連結されている両フランジ部の外側面に各別に当接可能な押圧部を備えた一対の挟持部材と、この両挾持部材の押圧部を両フランジ部の外側面に当て付けた状態で当該両挾持部材をフランジ接合方向に引き寄せて締付固定する締結手段とを備えたフランジ接合部補強治具に関する。   The present invention relates to a pair of clamping members each having a pressing portion that can be brought into contact with the outer surface of both flange portions that are bolted together, and the pressing portions of the both holding members applied to the outer surfaces of both flange portions. It is related with the flange joint part reinforcement jig provided with the fastening means which draws both the said holding members in the flange joining direction in the state where it clamped, and is fastened and fixed.

かかるフランジ接合部補強治具として、例えば、特許文献１には、両挟持部材のフランジ接合方向で相対向する部位に、両フランジ部の外周面よりも径方向外方側位置に形成された一対のボルト螺合孔（締結手段の一例）が形成され、両挟持部材においてボルト螺合孔よりも径方向内方側位置に形成された押圧部を両フランジ部の外側面に当て付けた状態で、両ネジボルト（締結手段の一例）を一対のボルト螺合孔に亘って螺合させた構成が開示されている。   As such a flange joint portion reinforcing jig, for example, in Patent Document 1, a pair formed in a radially outward position with respect to the outer peripheral surfaces of both flange portions at portions facing each other in the flange joint direction of both sandwiching members. The bolt screw holes (an example of fastening means) are formed, and the pressing parts formed at the radially inner side positions than the bolt screw holes in both clamping members are applied to the outer surfaces of both flange parts. A configuration in which both screw bolts (an example of fastening means) are screwed over a pair of bolt screw holes is disclosed.

また、かかるフランジ接合部補強治具として、例えば、特許文献２には、両挟持部材の一方が一対の脚部を備えた概略コ字形状部材で構成され、両挟持部材の他方が一対の脚部のうちの一方に螺合装着されるボルト（締結手段の一例）により構成されており、ボルトの先端及びコ字形状部材の当該ボルトが装着されていない他方の脚部の内周面が、両フランジ部の外側面を各別に押圧する押圧部とされた構成が開示されている。そして、一方の脚部にボルトを螺合させ、更に締め込むことにより、ボルトの先端及び他方の脚部の内周面をフランジ部の外側面に各別に当接させて、一対の挟持部材（コ字形状部材及びボルト）によりフランジ部を締付固定する構成とされている。   Further, as such a flange joint reinforcing jig, for example, in Patent Document 2, one of both sandwiching members is configured by a substantially U-shaped member having a pair of legs, and the other of both sandwiching members is a pair of legs. It is constituted by a bolt (an example of a fastening means) that is screwed and attached to one of the parts, and the inner peripheral surface of the other leg part to which the bolt and the bolt of the U-shaped member are not attached, The structure made into the press part which presses the outer surface of both flange parts separately is disclosed. Then, a bolt is screwed into one leg portion and further tightened, whereby the tip end of the bolt and the inner peripheral surface of the other leg portion are brought into contact with the outer side surface of the flange portion separately, and a pair of clamping members ( The flange portion is fastened and fixed by a U-shaped member and a bolt).

これらフランジ接合部補強治具を用いて、一対の挟持部材を締結手段により締付固定することで、複数のボルト・ナットによる両フランジ部の接合強度に加えて、締結手段による締結強度も付加することができ、両フランジ部に曲げ方向或いは引張方向に力が作用した場合でも、両フランジ部が離間することを防止して気密性を保持できるとされている。   By using these flange joint reinforcement jigs, a pair of clamping members are fastened and fixed by fastening means, thereby adding fastening strength by fastening means in addition to the joint strength of both flanges by a plurality of bolts and nuts. Even when a force is applied to both flange portions in the bending direction or the pulling direction, the flange portions can be prevented from separating and airtightness can be maintained.

特許第４１５７４１３号公報Japanese Patent No. 4157413 特許第４３６３５６５号公報Japanese Patent No. 4363565

ここで、両フランジ部を含む流体管路の耐震性をより向上させるために、既存或いは新設の両フランジ部を、耐震管路と同等（離脱防止力が３ＤｋＮ以上（Ｄは呼び径））の耐震性能Ａ級の性能を有するものに補強することが望まれる。
また、両フランジ部に曲げ方向或いは引張方向の力が作用した場合でも、両フランジ部の離間を防止し、内部を通流する流体の漏洩を確実に防止できる構成とすることが望まれる。 Here, in order to further improve the seismic resistance of the fluid pipe including both flanges, the existing or newly installed both flanges are equivalent to the seismic pipes (the separation prevention force is 3DkN or more (D is the nominal diameter)). It is desired to reinforce those having seismic performance class A performance.
In addition, even when a force in the bending direction or the tensile direction is applied to both flange portions, it is desirable that the both flange portions be prevented from separating and the fluid flowing through the interior can be reliably prevented from leaking.

さらに、両フランジ部の一方が、空気弁、補修弁、短管等の流体機器の一端側に形成されたフランジ部である場合には、当該両フランジ部にフランジ接合部補強治具を装着する際、フランジ接合部補強治具が流体機器に干渉する可能性がある。特に、流体機器の外径が両フランジ部に接続される流体管の外径よりも大径で、しかも、流体機器と当該流体機器の一端側に形成されたフランジ部とが流体管の管軸方向において近接する場合には、両フランジ部にフランジ接合部補強治具を装着する際、フランジ接合部補強治具が当該流体機器に干渉して装着が不能となることがあり、また、装着できたとしても、装着に手間が掛かるとともに、所期の装着位置からずれた不良な装着状態のまま装着されてしまう可能性がある。このような不良な装着状態では、両フランジ部に曲げ方向或いは引張方向の力が作用した場合に、フランジ接合部補強治具が、両フランジ部から離脱したり止水性能が低下したりして流体が漏洩する可能性がある。
同様に、両フランジ部の一方が流体機器の一端側に形成されたフランジ部である場合には、当該両フランジ部にフランジ接合部補強治具を装着する際、フランジ接合部補強治具が流体機器の他端側に形成されたフランジ部に干渉し、装着が不良或いは不能となる可能性もある。 Furthermore, when one of the two flange portions is a flange portion formed on one end side of a fluid device such as an air valve, a repair valve, a short pipe, etc., a flange joint reinforcing jig is attached to both the flange portions. At this time, the flange joint reinforcement jig may interfere with the fluid device. In particular, the outer diameter of the fluid device is larger than the outer diameter of the fluid pipe connected to both flange portions, and the fluid device and the flange portion formed on one end side of the fluid device are the tube axis of the fluid tube. If the flange joint reinforcement jigs are attached to both flanges, the flange joint reinforcement jigs may interfere with the fluid equipment and cannot be installed. Even if this is the case, it takes time and effort, and there is a possibility that it will be mounted in a defective mounting state deviated from the intended mounting position. In such a defective mounting state, when a force in the bending direction or the tensile direction acts on both flange portions, the flange joint reinforcing jig may come off from both flange portions or the water stop performance may deteriorate. Fluid may leak.
Similarly, when one of the flange portions is a flange portion formed on one end side of the fluid device, when the flange joint reinforcement jig is attached to both flange portions, the flange joint reinforcement jig is fluid. It may interfere with the flange portion formed on the other end side of the device, and the mounting may be defective or impossible.

これら点について着目すると、上記特許文献１に開示のフランジ接合部補強治具では、両フランジ部の外側面に各別に当接する押圧部を備えた一対の挟持部材が、当該押圧部の径方向外方側に形成された一対のボルト螺合孔に亘って螺合させた両ネジボルトにより締付固定されており、一対の挟持部材は実質的に一対のボルト螺合孔及び両ネジボルトのみで締付固定されているに過ぎず、両フランジ部に曲げ方向或いは引張方向の力が作用した際には、当該力が、フランジ部及び一対の挟持部材を介して一対のボルト螺合孔と両ネジボルトとの螺合箇所に集中し、両ネジボルトが伸長したり、螺合箇所のねじ山が破壊される場合があり、両フランジ部が離間する可能性がある。この場合、両フランジ部間から流体が漏洩する可能性があるとともに、両フランジ部を上述の耐震管路と同等の耐震性能を有する程度にまで補強することは困難となる。   Focusing on these points, in the flange joint reinforcing jig disclosed in Patent Document 1, a pair of clamping members each having a pressing portion that abuts against the outer surface of both flange portions is located radially outside the pressing portion. It is fastened and fixed by both screw bolts screwed over a pair of bolt screw holes formed on the side, and the pair of clamping members are substantially tightened only by the pair of screw screw holes and both screw bolts. It is only fixed, and when a force in the bending direction or the tensile direction acts on both flange portions, the force is applied to the pair of bolt screw holes and the screw bolts via the flange portion and the pair of clamping members. There is a possibility that both screw bolts may be stretched and the screw thread at the screwed portion may be broken, and the two flange portions may be separated. In this case, fluid may leak from between both flange portions, and it will be difficult to reinforce both flange portions to such an extent that they have the same seismic performance as the above-mentioned seismic ducts.

また、上記特許文献２に開示のフランジ接合部補強治具では、ボルトがコ字形状部材の一方の脚部に管軸方向の外方側から螺合装着され、当該ボルトの先端がフランジ部の外側面に当接する構成とされている。このため、コ字形状部材の管軸方向の外方側部位には、ボルトを一方の脚部に螺合装着させるための作業用空間が必要となり、両フランジ部の一方が空気弁や補修弁等の流体機器の一端側に形成されたフランジ部である場合には、両フランジ部にフランジ接合部補強治具を装着する際、フランジ接合部補強治具やボルトが流体機器や当該流体機器の他端側に形成されたフランジ部に干渉して装着が不能或いは不良となる可能性がある。
さらに、ボルトの先端がフランジ部の外側面に当接すると当該外側面に傷がつき腐食等の原因になるとともに、当該傷を防止するためにボルトの先端に保護部材を装着すると、当該ボルトがコ字形状部材の管軸方向の外方側部位に突出する突出代が大きくなり、当該外方側部位に大きな作業用空間を形成しなければフランジ接合部補強治具の両フランジ部への装着が、より一層不能或いは不良となる可能性がある。 Further, in the flange joint reinforcing jig disclosed in Patent Document 2, a bolt is screwed to one leg of the U-shaped member from the outer side in the tube axis direction, and the tip of the bolt is the flange portion. It is set as the structure contact | abutted on an outer surface. For this reason, a working space for screwing the bolt into one leg is required on the outer side portion of the U-shaped member in the tube axis direction, and one of the two flanges is an air valve or a repair valve. For example, when the flange joint reinforcing jig or bolt is attached to both flange parts, the flange joint reinforcing jig or bolt is connected to the fluid equipment or the fluid equipment. There is a possibility that the mounting may be impossible or defective due to interference with the flange portion formed on the other end side.
Further, if the tip of the bolt comes into contact with the outer surface of the flange portion, the outer surface is scratched and causes corrosion and the like, and if a protective member is attached to the tip of the bolt to prevent the scratch, the bolt If the protruding margin of the U-shaped member protruding to the outer side portion in the tube axis direction is large and a large working space is not formed in the outer side portion, the flange joint reinforcing jig is attached to both flange portions. However, there is a possibility of becoming even more impossible or defective.

本発明は、かかる実情に鑑みてなされたものであり、その目的は、両フランジ部に容易且つ確実に装着できるとともに、両フランジ部を含む流体管路を所定の耐震性能を備えた耐震管路に補強でき、しかも、両フランジ部の離間やずれを簡便且つ安価に防止して止水性能を向上できるフランジ接合部補強治具を提供することにある。   The present invention has been made in view of such circumstances, and an object of the present invention is to provide a seismic duct having a predetermined seismic performance for a fluid duct including both flange sections, which can be easily and reliably attached to both flange sections. Another object of the present invention is to provide a flange joint reinforcing jig capable of improving the water stop performance by easily and inexpensively preventing separation and displacement of both flange portions.

上記目的を達成するための本発明に係るフランジ接合部補強治具は、ボルト連結されている両フランジ部の外側面に各別に当接可能な押圧部を備えた一対の挟持部材と、この両挾持部材の押圧部を両フランジ部の外側面に当て付けた状態で当該両挾持部材をフランジ接合方向に引き寄せて締付固定する締結手段とを備えたフランジ接合部補強治具であって、その特徴構成は、
前記両挾持部材のフランジ接合方向で相対向する部位に、前記両フランジ部の外周面よりも径方向外方側位置においてフランジ接合方向から嵌合する内嵌合部と外嵌合部とが形成され、
少なくとも一方の挟持部材の押圧部を、前記内嵌合部又は前記外嵌合部に対して前記両フランジ部の径方向に進退自在な進退手段を備えた点にある。 In order to achieve the above object, a flange joint reinforcing jig according to the present invention comprises a pair of clamping members each having a pressing portion capable of abutting against the outer surface of both flanges connected to each other by bolts. A flange joint reinforcement jig comprising a fastening means for pulling and fixing both gripping members in the flange joining direction in a state where the pressing portions of the gripping members are applied to the outer surfaces of both flanges, The feature configuration is
An inner fitting portion and an outer fitting portion that are fitted from the flange joining direction at a radially outer side position than the outer peripheral surface of the both flange portions are formed at portions facing each other in the flange joining direction of the both holding members. And
The pressing portion of at least one of the clamping members is provided with an advancing / retreating means that is movable back and forth in the radial direction of both flange portions with respect to the inner fitting portion or the outer fitting portion.

上記特徴構成によれば、一対の挟持部材におけるフランジ接合方向で相対向する各部位に、両フランジ部の外周面よりも径方向外方側位置においてフランジ接合方向から嵌合する内嵌合部と外嵌合部とが形成されているので、一対の挟持部材の各押圧部を両フランジ部の外側面に各別に当て付けた状態で締結手段を締付けると、両挟持部材がフランジ接合方向に引き寄せられるにつれて、内嵌合部が外嵌合部内に嵌合し、内嵌合部と外嵌合部とがフランジ接合方向（軸方向）で重なった状態となる。
これにより、一対の挟持部材が締結手段により締付固定された状態で、両フランジ部に曲げ方向（径方向）への力が作用した場合でも、締結手段の締結部位に加えて、内嵌合部と外嵌合部との重なり部位でも当該力を受け止めることができ、締結手段の締結部位に掛かる応力の低減を図ることができる。従って、フランジ接合部補強治具による両フランジ部の接合強度を向上させて、両フランジ部の離間やずれ及びこれらに伴う流体の漏洩を防止することができ、管路の耐震性能の向上をも図ることができる。 According to the above characteristic configuration, the inner fitting portions that are fitted from the flange joining direction at positions radially outward from the outer peripheral surfaces of the two flange portions to the respective portions facing each other in the flange joining direction of the pair of holding members. Since the outer fitting part is formed, if the fastening means is tightened with the pressing parts of the pair of clamping members applied to the outer surfaces of the flange parts separately, the clamping members are pulled in the flange joining direction. As a result, the inner fitting portion is fitted into the outer fitting portion, and the inner fitting portion and the outer fitting portion are overlapped in the flange joining direction (axial direction).
As a result, even when a force in the bending direction (radial direction) acts on both flange portions in a state where the pair of clamping members are clamped and fixed by the fastening means, in addition to the fastening part of the fastening means, the inner fitting The force can be received even at the overlapping portion of the portion and the outer fitting portion, and the stress applied to the fastening portion of the fastening means can be reduced. Therefore, it is possible to improve the joint strength of both flange portions by the flange joint reinforcement jig, to prevent separation and displacement of both flange portions and fluid leakage accompanying them, and to improve the seismic performance of the pipeline. Can be planned.

加えて、少なくとも一方の挟持部材の押圧部を内嵌合部又は外嵌合部に対して両フランジ部の径方向に進退自在な進退手段を備えているので、フランジ接合部補強治具を両フランジ部に装着する際などに、当該押圧部を内嵌合部又は外嵌合部に対して両フランジ部の径方向に進退させて、当該押圧部がフランジ部の外側面に当て付けられる位置を適宜調整することができる。
これにより、例えば、両フランジ部のうち一方のフランジ部に接続された空気弁や補修弁等の流体機器の外径が当該フランジ部に接続される流体管の外径よりも大径で、しかも、流体機器と当該フランジ部とが流体管の管軸方向において近接する場合であっても、一方の挟持部材の押圧部を両フランジ部の径方向外方側に適宜引退させることで、当該押圧部が流体機器に干渉しない状態で両挟持部材を両フランジ部に装着することができる。また、例えば、両フランジ部のうち一方のフランジ部に空気弁等の流体機器が接続されていない場合には、当該一方の挟持部材の押圧部を両フランジ部の径方向内方側に適宜進入させることで、当該押圧部を所期の装着位置に装着させることができる。なお、当該押圧部を両フランジ部の径方向に進退させることは、フランジ接合部補強治具を両フランジ部に装着する際のみならず、両フランジ部への装着前、装着中、装着後、或いは、離脱後であってもよく、また、両フランジ部の一方に流体機器が接続されている場合でも接続されていない場合であってもよい。
よって、両フランジ部に容易且つ確実に装着できるとともに、両フランジ部を含む流体管路を所定の耐震性能を備えた耐震管路に補強でき、しかも、両フランジ部の離間やずれを簡便且つ安価に防止して止水性能を向上できる。 In addition, since the pressing portion of at least one clamping member is provided with an advancing / retracting means that can be moved back and forth in the radial direction of both flange portions with respect to the inner fitting portion or the outer fitting portion, both flange joint reinforcing jigs are provided. The position at which the pressing portion is applied to the outer surface of the flange portion by moving the pressing portion forward and backward in the radial direction of both flange portions with respect to the inner fitting portion or the outer fitting portion when mounting on the flange portion, etc. Can be adjusted as appropriate.
Thus, for example, the outer diameter of a fluid device such as an air valve or a repair valve connected to one of the flange portions is larger than the outer diameter of the fluid pipe connected to the flange portion, and Even when the fluid device and the flange portion are close to each other in the tube axis direction of the fluid pipe, the pressing portion of one clamping member is appropriately retracted to the radially outward side of both flange portions to Both clamping members can be attached to both flange portions in a state where the portion does not interfere with the fluid device. For example, when a fluid device such as an air valve is not connected to one of the flange portions, the pressing portion of the one clamping member appropriately enters the radially inner side of both flange portions. By doing so, the pressing portion can be mounted at the intended mounting position. It should be noted that the pressing portion is advanced and retracted in the radial direction of both flange portions not only when the flange joint reinforcing jig is attached to both flange portions, but also before, during, and after attachment to both flange portions, Alternatively, it may be after detachment, or may be a case where a fluid device is connected to one of both flange portions, or a case where it is not connected.
Therefore, it can be easily and securely attached to both flange portions, and the fluid conduit including both flange portions can be reinforced with an earthquake resistant conduit having a predetermined seismic performance, and the separation and displacement of both flange portions can be easily and inexpensively. It is possible to improve the water stop performance.

本発明に係るフランジ接合部補強治具の更なる特徴構成は、前記進退手段が前記両フランジ部の径方向に進退自在な状態で前記内嵌合部又は前記外嵌合部に設けられる進退部材を備え、少なくとも一方の挟持部材の押圧部が前記進退部材に設けられている点にある。   A further characteristic configuration of the flange joint reinforcing jig according to the present invention is that the advance / retreat member is provided in the inner fitting portion or the outer fitting portion in a state in which the advance / retreat means is movable in the radial direction of the both flange portions. The pressing part of at least one clamping member is provided in the advance / retreat member.

上記特徴構成によれば、進退部材を内嵌合部又は外嵌合部に対して両フランジ部の径方向に進退させることで、少なくとも一方の挟持部材の押圧部がフランジ部の外側面に当て付けられる部位を、両フランジ部の径方向で簡便に調整することができる。   According to the above characteristic configuration, the advancing / retreating member is advanced / retreated in the radial direction of the both flange portions with respect to the inner fitting portion or the outer fitting portion, so that the pressing portion of at least one of the clamping members contacts the outer surface of the flange portion. The part to be attached can be easily adjusted in the radial direction of both flange portions.

本発明に係るフランジ接合部補強治具の更なる特徴構成は、前記進退手段が前記内嵌合部又は前記外嵌合部において前記両フランジ部の径方向に開口形成される保持孔を備え、前記進退部材が前記保持孔に挿通されて前記両フランジ部の径方向に進退自在に構成され、
前記内嵌合部と前記外嵌合部とが夫々筒状又は略筒状に構成され、前記締結手段の締結ボルトが、フランジ接合方向で前記進退部材に開口形成される貫通孔に挿通された状態で、前記内嵌合部と前記外嵌合部との筒状内部空間内に挿通されている点にある。 A further characteristic configuration of the flange joint reinforcing jig according to the present invention includes a holding hole in which the advance / retreat means is formed to open in the radial direction of the both flange portions in the inner fitting portion or the outer fitting portion, The advance / retreat member is inserted into the holding hole and is configured to advance and retreat in the radial direction of the both flange portions,
The inner fitting portion and the outer fitting portion are each configured in a cylindrical shape or a substantially cylindrical shape, and a fastening bolt of the fastening means is inserted into a through-hole formed in the advance / retreat member in a flange joining direction. In the state, it exists in the point penetrated in the cylindrical internal space of the said inner fitting part and the said outer fitting part.

上記特徴構成によれば、内嵌合部と外嵌合部とが夫々筒状又は略筒状に構成され、外嵌合部内に内嵌合部が嵌合し、内嵌合部内の筒状内部空間に締結手段の締結ボルトが挿通されるので、両フランジ部の外周面の径方向外方側位置にある内嵌合部及び外嵌合部の配設箇所と、締結ボルトの配設箇所とを兼用することができる。これにより、両フランジ部に装着されたフランジ接合部補強治具及び締結ボルトのフランジ接合方向（軸方向）での寸法、及び、当該フランジ接合部補強治具の径方向外方側（径方向）での寸法の何れをも小さくすることができ、省スペース化を図ることができる。
また、進退部材が内嵌合部又は外嵌合部において両フランジ部の径方向に開口形成される保持孔に挿通され、且つ、締結手段の締結ボルトが内嵌合部の筒状内部空間内においてフランジ接合方向で進退部材に開口形成される貫通孔に挿通されるので、両フランジ部の径方向における進退部材の進退を保持孔により保持案内された状態で良好に行うことができ、しかも、進退部材を筒状内部空間内に挿通しても締結ボルトの締結が阻害されることがなくなる。 According to the above characteristic configuration, the inner fitting portion and the outer fitting portion are each configured in a cylindrical shape or a substantially cylindrical shape, the inner fitting portion is fitted in the outer fitting portion, and the cylindrical shape in the inner fitting portion. Since the fastening bolt of the fastening means is inserted into the internal space, the inner fitting portion and the outer fitting portion are disposed at the radially outer positions of the outer peripheral surfaces of both flange portions, and the fastening bolt is disposed. Can also be used. Thereby, the dimension in the flange joining direction (axial direction) of the flange joint reinforcing jig and the fastening bolt attached to both flange parts, and the radially outward side (radial direction) of the flange joint reinforcing jig Any of these dimensions can be reduced, and space can be saved.
Further, the advancing / retreating member is inserted into the holding hole formed in the radial direction of both flange portions in the inner fitting portion or the outer fitting portion, and the fastening bolt of the fastening means is in the cylindrical inner space of the inner fitting portion. In the flange joining direction in the through hole is formed through the through hole formed in the advance and retreat member, the advance and retreat member in the radial direction of both flange portions can be satisfactorily performed while being held and guided by the holding hole, Even if the advance / retreat member is inserted into the cylindrical internal space, the fastening of the fastening bolt is not hindered.

本発明に係るフランジ接合部補強治具の更なる特徴構成は、前記進退手段が、前記両フランジ部の径方向内方側への前記進退部材の進入を最大進入位置に規制する最大進入位置規制部と、前記両フランジ部の径方向外方側への前記進退部材の引退を最大引退位置に規制する最大引退位置規制部とを備えた点にある。   According to still another feature of the flange joint reinforcing jig according to the present invention, the advance / retreat means restricts the entry of the advance / retreat member into the radially inward side of the both flange portions at a maximum entry position. And a maximum retraction position restricting portion that restricts retraction of the advance / retreat member to the radially outward side of the both flange portions at a maximum retraction position.

上記特徴構成によれば、両フランジ部の径方向における進退部材の進退を、最大進入位置規制部により径方向内方側への最大進入位置と最大引退位置規制部により径方向外方側への最大引退位置との範囲内で許容しながら、当該進退を当該範囲内に確実に規制することができ、進退部材が内嵌合部又は外嵌合部から離脱することを良好に防止できる。   According to the above characteristic configuration, the advancing / retreating of the advancing / retreating member in the radial direction of both flange portions is caused to be caused by the maximum approach position restricting portion to the radially inward maximum entry position and the maximum retracting position restricting portion to the radially outward side. While allowing within the range of the maximum retraction position, the advance / retreat can be reliably regulated within the range, and the advance / retreat member can be favorably prevented from being detached from the inner fitting portion or the outer fitting portion.

本発明に係るフランジ接合部補強治具の更なる特徴構成は、前記進退手段が前記内嵌合部又は前記外嵌合部において前記両フランジ部の径方向に開口形成される保持孔を備え、前記進退部材が前記保持孔に挿通されて前記両フランジ部の径方向に進退自在に構成され、
前記内嵌合部と前記外嵌合部とが夫々筒状又は略筒状に構成され、前記締結手段の締結ボルトが、フランジ接合方向で前記進退部材に開口形成される貫通孔に挿通された状態で、前記内嵌合部と前記外嵌合部との筒状内部空間内に挿通され、
前記貫通孔が、前記両フランジ部の径方向に沿った長孔に形成され、
少なくとも前記最大進入位置規制部及び前記最大引退位置規制部の一方が前記長孔により構成されている点にある。 A further characteristic configuration of the flange joint reinforcing jig according to the present invention includes a holding hole in which the advance / retreat means is formed to open in the radial direction of the both flange portions in the inner fitting portion or the outer fitting portion, The advance / retreat member is inserted into the holding hole and is configured to advance and retreat in the radial direction of the both flange portions,
The inner fitting portion and the outer fitting portion are each configured in a cylindrical shape or a substantially cylindrical shape, and a fastening bolt of the fastening means is inserted into a through-hole formed in the advance / retreat member in a flange joining direction. In a state, it is inserted into a cylindrical inner space between the inner fitting portion and the outer fitting portion,
The through hole is formed in a long hole along the radial direction of the two flange portions,
At least one of the maximum entry position restriction part and the maximum retraction position restriction part is formed by the long hole.

上記特徴構成によれば、少なくとも最大進入位置規制部及び最大引退位置規制部の一方が、進退部材の貫通孔（両フランジ部のフランジ接合方向に開口形成され且つ径方向に沿った長孔）により構成されているので、進退部材が径方向に進退した際、当該進退部材の長孔に挿通された締結ボルトの外周面に、当該長孔の径方向内方側部位又は径方向外方側部位が当接し、進退部材の移動が径方向内方側における最大進入位置又は径方向外方側における最大引退位置に規制される。これにより、締結ボルトを挿通するための長孔（貫通孔）を最大進入位置規制部又は最大引退位置規制部として兼用することができ、各規制部を簡単な構成で実現することができる。   According to the above characteristic configuration, at least one of the maximum entry position restriction part and the maximum retraction position restriction part is formed by the through hole of the advance / retreat member (a long hole formed in the flange joining direction of both flange parts and extending in the radial direction). Since it is configured, when the advance / retreat member advances / retreats in the radial direction, on the outer peripheral surface of the fastening bolt inserted through the long hole of the advance / retreat member, the radially inner side portion or the radially outer side portion of the long hole Contact, and the movement of the advance / retreat member is restricted to the maximum entry position on the radially inner side or the maximum retraction position on the radially outer side. Thereby, the long hole (through-hole) for inserting the fastening bolt can be used as the maximum entry position restriction part or the maximum retraction position restriction part, and each restriction part can be realized with a simple configuration.

上記目的を達成するための本発明に係るフランジ接合部補強治具は、ボルト連結されている両フランジ部の外側面に各別に当接可能な押圧部を備えた一対の挟持部材と、この両挾持部材の押圧部を両フランジ部の外側面に当て付けた状態で当該両挾持部材をフランジ接合方向に引き寄せて締付固定する締結手段とを備えたフランジ接合部補強治具であって、その特徴構成は、
前記両挾持部材のフランジ接合方向で相対向する部位に、前記両フランジ部の外周面よりも径方向外方側位置においてフランジ接合方向から嵌合する内嵌合部と外嵌合部とが形成され、
前記両挟持部材の押圧部が前記両フランジ部の径方向において相互に偏倚した位置において前記両フランジ部の外側面に当て付けられた状態で、前記両挾持部材が前記締結手段により締付固定操作可能に構成されている点にある。 In order to achieve the above object, a flange joint reinforcing jig according to the present invention comprises a pair of clamping members each having a pressing portion capable of abutting against the outer surface of both flanges connected to each other by bolts. A flange joint reinforcement jig comprising a fastening means for pulling and fixing both gripping members in the flange joining direction in a state where the pressing portions of the gripping members are applied to the outer surfaces of both flanges, The feature configuration is
An inner fitting portion and an outer fitting portion that are fitted from the flange joining direction at a radially outer side position than the outer peripheral surface of the both flange portions are formed at portions facing each other in the flange joining direction of the both holding members. And
The clamping members are tightened and fixed by the fastening means in a state in which the pressing portions of the both clamping members are abutted against the outer surfaces of the flange portions at a position where the pressing portions of the both flange portions are deviated from each other in the radial direction. It is in the point where it is configured.

上記特徴構成によれば、一対の挟持部材におけるフランジ接合方向で相対向する各部位に、両フランジ部の外周面よりも径方向外方側位置においてフランジ接合方向から嵌合する内嵌合部と外嵌合部とが形成されているので、一対の挟持部材の各押圧部を両フランジ部の外側面に各別に当て付けた状態で締結手段を締付けると、両挟持部材がフランジ接合方向に引き寄せられるにつれて、内嵌合部が外嵌合部内に嵌合し、内嵌合部と外嵌合部とがフランジ接合方向（軸方向）で重なった状態となる。
これにより、一対の挟持部材が締結手段により締付固定された状態で、両フランジ部に曲げ方向（径方向）への力が作用した場合でも、締結手段の締結部位に加えて、内嵌合部と外嵌合部との重なり部位でも当該力を受け止めることができ、締結手段の締結部位に掛かる応力の低減を図ることができる。従って、フランジ接合部補強治具による両フランジ部の接合強度を向上させて、両フランジ部の離間やずれ及びこれらに伴う流体の漏洩を防止することができ、管路の耐震性能の向上をも図ることができる。 According to the above characteristic configuration, the inner fitting portions that are fitted from the flange joining direction at positions radially outward from the outer peripheral surfaces of the two flange portions to the respective portions facing each other in the flange joining direction of the pair of holding members. Since the outer fitting part is formed, if the fastening means is tightened with the pressing parts of the pair of clamping members applied to the outer surfaces of the flange parts separately, the clamping members are pulled in the flange joining direction. As a result, the inner fitting portion is fitted into the outer fitting portion, and the inner fitting portion and the outer fitting portion are overlapped in the flange joining direction (axial direction).
As a result, even when a force in the bending direction (radial direction) acts on both flange portions in a state where the pair of clamping members are clamped and fixed by the fastening means, in addition to the fastening part of the fastening means, the inner fitting The force can be received even at the overlapping portion of the portion and the outer fitting portion, and the stress applied to the fastening portion of the fastening means can be reduced. Therefore, it is possible to improve the joint strength of both flange portions by the flange joint reinforcement jig, to prevent separation and displacement of both flange portions and fluid leakage accompanying them, and to improve the seismic performance of the pipeline. Can be planned.

加えて、両挟持部材の押圧部がフランジ部の径方向において相互に偏倚した位置において両フランジ部の外側面に当て付けられた状態で、両挾持部材が締結手段により締付固定操作可能に構成されているので、当該状態では、両押圧部を、両フランジ部の径方向において、径方向外方側の位置で当て付けられる外方側押圧部と、当該外方側押圧部よりも径方向内方側の位置で当て付けられる内方側押圧部とから構成することが可能となる。
これにより、例えば、両フランジ部のうち一方のフランジ部に接続された空気弁や補修弁等の流体機器の外径が当該一方のフランジ部に接続される流体管の外径よりも大径で、しかも、流体機器と当該一方のフランジ部とが流体管の管軸方向において近接する場合であっても、両フランジ部の径方向外方側に適宜引退した構成である一方の挟持部材の押圧部（外方側押圧部）が流体機器に干渉しない状態で、両挟持部材を両フランジ部に装着することができ、しかも、両フランジ部のうち空気弁等の流体機器が接続されていない他方のフランジ部には、両フランジ部の径方向内方側に適宜進入した構成である他方の挟持部材の押圧部（内方側押圧部）が所期の位置でフランジ部の外側面に当て付けられる状態で、両挟持部材を両フランジ部に装着することができる。
よって、両フランジ部に容易且つ確実に装着できるとともに、両フランジ部を含む流体管路を所定の耐震性能を備えた耐震管路に補強でき、しかも、両フランジ部の離間やずれを簡便且つ安価に防止して止水性能を向上できる。 In addition, both clamping members can be clamped and fixed by fastening means in a state where the pressing portions of both clamping members are abutted against the outer surfaces of both flange portions at positions where they are biased relative to each other in the radial direction of the flange portion. Therefore, in this state, the two pressing portions are arranged in the radial direction of the two flange portions in the radial direction with respect to the outer pressing portion that is applied at a position on the radially outer side and the outer pressing portion. It becomes possible to comprise from the inner side press part applied by the position of an inner side.
Thus, for example, the outer diameter of a fluid device such as an air valve or a repair valve connected to one of the flange portions is larger than the outer diameter of the fluid pipe connected to the one flange portion. In addition, even when the fluid device and the one flange portion are close to each other in the tube axis direction of the fluid pipe, the pressing of the one clamping member that is configured to be appropriately retracted radially outward of both flange portions The two clamping members can be attached to both flange portions in a state where the portion (outward side pressing portion) does not interfere with the fluid device, and the other fluid device such as an air valve is not connected to the other flange portion. The pressing part (inner side pressing part) of the other clamping member, which is configured to appropriately enter the radially inward side of both flange parts, is applied to the outer surface of the flange part at the desired position. The two clamping members on both flanges It is possible to wear.
Therefore, it can be easily and securely attached to both flange portions, and the fluid conduit including both flange portions can be reinforced with an earthquake resistant conduit having a predetermined seismic performance, and the separation and displacement of both flange portions can be easily and inexpensively. It is possible to improve the water stop performance.

本発明に係るフランジ接合部補強治具の更なる特徴構成は、前記フランジ接合方向における前記両フランジ部間に環状の密封部材が装着され、
少なくとも一方の挟持部材の押圧部が前記フランジ部の外側面における前記密封部材に対応する部位に位置する状態で、前記両挾持部材が前記締結手段により締付固定操作可能に構成されている点にある。 A further characteristic configuration of the flange joint reinforcing jig according to the present invention is such that an annular sealing member is mounted between the flange portions in the flange joining direction,
In the state where the pressing portion of at least one clamping member is located at a portion corresponding to the sealing member on the outer surface of the flange portion, the both clamping members are configured to be clamped and fixed by the fastening means. is there.

上記特徴構成によれば、少なくとも一方の挟持部材の押圧部がフランジ部の外側面において密封部材に対応する部位に位置する状態で、両挾持部材が締結手段により締付固定操作可能に構成されているので、両押圧部のうち少なくとも一方の押圧部を当該密封部材に対応する部位におけるフランジ部の外側面に当て付けた状態で両挟持部材を締付固定して、両フランジにより密封部材を確実に押圧することができ、両フランジ部間の密封性を向上して止水性能を向上することができる。   According to the above characteristic configuration, the holding members are configured to be capable of being tightened and fixed by the fastening means in a state where the pressing portion of at least one of the holding members is located at a portion corresponding to the sealing member on the outer surface of the flange portion. Therefore, the clamping members are fastened and fixed with both flanges in a state where at least one of the pressing parts is applied to the outer surface of the flange portion at the portion corresponding to the sealing member. The sealing performance between the two flange portions can be improved and the water stop performance can be improved.

本発明に係るフランジ接合部補強治具の更なる特徴構成は、前記両挾持部材の前記内嵌合部と前記外嵌合部とが嵌合している状態において、一方の挾持部材の押圧部と前記内嵌合部と他方の挾持部材の押圧部と前記外嵌合部とで形成される凹部が、前記両フランジ部におけるボルト連結箇所の隣接間部位に対して径方向外方から外嵌装着可能に構成されているとともに、前記外嵌合部が、両フランジ部の外周面との当接によって設定外嵌装着位置に規制する装着規制部に構成されている点にある。   A further characteristic configuration of the flange joint reinforcing jig according to the present invention is that, in a state where the inner fitting portion and the outer fitting portion of the both holding members are fitted, the pressing portion of one holding member. And a recess formed by the inner fitting portion, the pressing portion of the other holding member, and the outer fitting portion are externally fitted from the radially outer side to a portion between adjacent bolt connection portions in the two flange portions. While being configured to be mountable, the outer fitting portion is configured as a mounting restricting portion that restricts the set outer fitting mounting position by contact with the outer peripheral surfaces of both flange portions.

上記特徴構成によれば、両挟持部材の両押圧部、内嵌合部及び外嵌合部により形成される凹部を、両フランジ部のボルト連結箇所の周方向での隣接部位に対して径方向外方から外嵌装着する際、両フランジ部の外周面よりも径方向外方側に位置する外嵌合部が当該外周面に当接する状態となるので、当該外嵌合部を、フランジ接合部補強治具を設定外嵌装着位置に規制する装着規制部とすることができ、フランジ接合部補強治具の装着作業の容易化及び確実化を図ることができる。また、一対の挟持部材が締結手段により締付固定された状態では、内嵌合部が内嵌された外嵌合部の外面が両フランジ部の外周面に当接しているので、両フランジ部に曲げ方向（径方向）の力が作用した場合には、当該外嵌合部の外面と両フランジ部の外周面との当接箇所でも当該力を受け止めることができ、締結手段、内嵌合部と外嵌合部との重なり部位に掛かる応力の低減を図ることができる。
従って、フランジ接合部補強治具を、両フランジ部に容易に装着できるとともに、フランジ接合部補強治具による両フランジ部の接合強度をより向上させて、両フランジ部の離間やずれ及びこれらに伴う流体の漏洩をより確実に防止することができ、管路の耐震性能の向上をも図ることができる。 According to the above characteristic configuration, the concave portions formed by the both pressing portions, the inner fitting portion, and the outer fitting portion of the both clamping members are arranged in the radial direction with respect to the adjacent portions in the circumferential direction of the bolt connecting portions of both flange portions. When the outer fitting is performed from the outside, the outer fitting portion positioned radially outward from the outer circumferential surfaces of both flange portions comes into contact with the outer circumferential surface. The part reinforcing jig can be an attachment restricting part that restricts the set external fitting attachment position, and the attachment work of the flange joint reinforcing jig can be facilitated and ensured. In addition, in a state where the pair of clamping members are fastened and fixed by the fastening means, the outer surfaces of the outer fitting portions into which the inner fitting portions are fitted are in contact with the outer peripheral surfaces of the two flange portions. When a force in the bending direction (radial direction) is applied to the flange, the force can be received even at the contact point between the outer surface of the outer fitting portion and the outer peripheral surface of both flange portions. It is possible to reduce the stress applied to the overlapping portion between the portion and the outer fitting portion.
Accordingly, the flange joint reinforcing jig can be easily attached to both flange parts, and the joint strength of both flange parts by the flange joint reinforcing jig is further improved, and the separation and displacement of both flange parts and the accompanying them. Fluid leakage can be prevented more reliably, and the seismic performance of the pipe can be improved.

本発明に係るフランジ接合部補強治具の更なる特徴構成は、前記内嵌合部と前記外嵌合部とが相対回転不能な嵌合形状に構成されている点にある。   A further characteristic configuration of the flange joint reinforcing jig according to the present invention is that the inner fitting portion and the outer fitting portion are configured in a fitting shape in which relative rotation is impossible.

上記特徴構成によれば、内嵌合部と外嵌合部とがフランジ接合方向周りで相対回転不能な状態で嵌合されるので、内嵌合部と外嵌合部との相対回転、即ち、一対の挟持部材同士の相対回転を防止することができる。これにより、両フランジ部にフランジ接合部補強治具を装着する際、両挟持部材の内嵌合部と外嵌合部とを嵌合させることで、一対の挟持部材同士の相対位置関係を所期の位置関係に位置決めすることができ、両フランジ部への装着作業をより一層容易に行うことができる。   According to the above characteristic configuration, since the inner fitting portion and the outer fitting portion are fitted in a state in which the inner fitting portion and the outer fitting portion are not relatively rotatable around the flange joining direction, the relative rotation between the inner fitting portion and the outer fitting portion, that is, The relative rotation between the pair of clamping members can be prevented. Thus, when the flange joint reinforcing jig is attached to both flange portions, the relative position relationship between the pair of sandwiching members is determined by fitting the inner fitting portion and the outer fitting portion of both sandwiching members. Therefore, it is possible to perform the mounting operation on both flange portions even more easily.

本発明に係るフランジ接合部補強治具の更なる特徴構成は、前記締結手段が、前記内嵌合部と前記外嵌合部との筒状内部空間に対して前記外嵌合部の外側から挿入される締結ボルトと、前記内嵌合部の内周面における前記外嵌合部側の一端部に形成された当該締結ボルトが螺合する雌ネジ部とから構成されている点にある。   According to a further feature of the flange joint reinforcing jig according to the present invention, the fastening means is configured so that the cylindrical inner space between the inner fitting portion and the outer fitting portion is outside the outer fitting portion. The fastening bolt is inserted and a female screw portion into which the fastening bolt formed at one end of the inner fitting portion on the outer fitting portion side is screwed.

上記特徴構成によれば、締結手段が、内嵌合部と外嵌合部との筒状内部空間に対して外嵌合部の外側から挿入される締結ボルトと、内嵌合部の内周面に形成された締結ボルトが螺合する雌ネジ部とから構成されているので、雌ネジ部を筒状内部空間内における内嵌合部と外嵌合部との重なり部位に位置させることができ、締結ボルトの長さを比較的短くすることが可能となる。これにより、フランジ部の呼び径や設計圧力に応じて各フランジ部の肉厚を変更した場合でも、締結ボルトの先端が筒状内部空間の外部に突出することを良好に防止することができ、フランジ接合部補強治具の外観を損なうことなく省スペース化を図ることができる。
また、雌ネジ部が、内嵌合部の内周面における外嵌合部側の一端部に形成されているので、当該雌ネジ部は、内嵌合部と外嵌合部との筒状内部空間に挿通された締結ボルトの頭部に近接した位置に位置することとなる。これにより、雌ネジ部と締結ボルトの雄ネジ部との螺合箇所が、締結ボルトの頭部が外嵌合部と当接する位置に近接することとなり、フランジ接合方向（軸方向）における締結ボルトの頭部と当該螺合箇所との距離を比較的小さくすることができ、両フランジ部に曲げ方向（径方向）或いは引張方向（軸方向）の力が作用した場合でも、締結ボルトの伸びや破壊を良好に防止することができる。即ち、締結ボルトの伸び等を防止できるので、両フランジ部の離間やずれ及びこれらに伴う流体の漏洩を良好に防止することができる。また、当該距離を比較的小さくすることができれば、締結ボルトとして汎用のボルトを使用することが可能となり、フランジ接合部補強治具を安価のものとすることができる。 According to the above characteristic configuration, the fastening means includes the fastening bolt inserted from the outside of the outer fitting portion into the cylindrical inner space of the inner fitting portion and the outer fitting portion, and the inner periphery of the inner fitting portion. Since the fastening bolt formed on the surface is screwed into the female screw portion, the female screw portion can be positioned at the overlapping portion of the inner fitting portion and the outer fitting portion in the cylindrical inner space. It is possible to relatively shorten the length of the fastening bolt. Thereby, even when the thickness of each flange portion is changed according to the nominal diameter or design pressure of the flange portion, it is possible to satisfactorily prevent the tip of the fastening bolt from protruding outside the cylindrical internal space, Space saving can be achieved without impairing the appearance of the flange joint reinforcing jig.
Further, since the female screw portion is formed at one end portion on the outer fitting portion side on the inner peripheral surface of the inner fitting portion, the female screw portion is a cylindrical shape of the inner fitting portion and the outer fitting portion. It will be located in the position close to the head of the fastening bolt inserted in the internal space. As a result, the screwed portion of the female screw portion and the male screw portion of the fastening bolt comes close to the position where the head of the fastening bolt comes into contact with the outer fitting portion, and the fastening bolt in the flange joining direction (axial direction) The distance between the head and the screwed portion can be made relatively small, and even when a force in the bending direction (radial direction) or tensile direction (axial direction) acts on both flange portions, Breakage can be prevented well. That is, since it is possible to prevent the fastening bolts from being stretched, it is possible to satisfactorily prevent the flanges from being separated or displaced and the fluid leakage associated therewith. Further, if the distance can be made relatively small, a general-purpose bolt can be used as the fastening bolt, and the flange joint reinforcing jig can be made inexpensive.

本発明に係るフランジ接合部補強治具の更なる特徴構成は、前記締結手段が、前記内嵌合部と前記外嵌合部との筒状内部空間に対して一方の外側から貫通状態で挿入される締結ボルトと、当該締結ボルトの突出雄ネジ部に他方の外側から螺合する締結ナットとから構成されている点にある。   According to a further feature of the flange joint reinforcing jig according to the present invention, the fastening means is inserted in a cylindrical inner space between the inner fitting portion and the outer fitting portion from one outer side in a penetrating state. And a fastening nut that is screwed into the protruding male screw portion of the fastening bolt from the other outer side.

上記特徴構成によれば、締結手段が、内嵌合部と外嵌合部との筒状内部空間に対して一方の外側から貫通状態で挿入される締結ボルトと、当該締結ボルトの突出雄ネジ部に他方の外側から螺合する締結ナットとから構成されているので、内嵌合部及び外嵌合部を筒状に形成するだけでよくネジ山を形成する必要がないため、フランジ接合部補強治具を簡便且つ安価な構成とすることができる。   According to the above characteristic configuration, the fastening means is inserted into the cylindrical inner space of the inner fitting portion and the outer fitting portion in a penetrating state from one outer side, and the protruding male screw of the fastening bolt Since it is composed of a fastening nut that is screwed to the outer part from the other outer side, it is only necessary to form the inner fitting part and the outer fitting part in a cylindrical shape, and it is not necessary to form a thread. The reinforcing jig can be made simple and inexpensive.

本発明に係るフランジ接合部補強治具の更なる特徴構成は、前記両フランジ部の夫々が流体管に接続され、前記両フランジ部のうち少なくとも一方のフランジ部に前記流体管の外径よりも大径の流体機器が接続されている点にある。   According to a further feature of the flange joint reinforcing jig according to the present invention, each of the two flange portions is connected to a fluid pipe, and at least one of the two flange portions has an outer diameter of the fluid pipe. A large diameter fluid device is connected.

上記特徴構成によれば、夫々が流体管に接続された両フランジ部のうち、少なくとも一方のフランジ部に流体管の外径よりも大径の流体機器が接続されているので、両フランジ部にフランジ接合部補強治具を装着する際に当該流体機器が装着の邪魔になる場合があるが、このような場合であっても、少なくとも一方の挟持部材の押圧部が当該流体機器に干渉しない状態で、両挟持部材を両フランジ部に装着することができる。   According to the above characteristic configuration, since the fluid device having a larger diameter than the outer diameter of the fluid pipe is connected to at least one of the flange parts connected to the fluid pipes, When mounting the flange joint reinforcing jig, the fluid device may interfere with the mounting, but even in such a case, the pressing portion of at least one clamping member does not interfere with the fluid device. Thus, both clamping members can be mounted on both flange portions.

両フランジ部の部分縦断面図Partial longitudinal section of both flanges 両フランジ部の部分横断面図Partial cross-sectional view of both flanges 第１挟持部材及び第２挟持部材の概略構成を示す図The figure which shows schematic structure of a 1st clamping member and a 2nd clamping member. 第１挟持部材の概略構成を示す図The figure which shows schematic structure of a 1st clamping member 第２挟持部材の概略構成を示す図The figure which shows schematic structure of a 2nd clamping member 第１及び第２挟持部材の移動可能範囲を示す部分縦断面図Partial longitudinal sectional view showing the movable range of the first and second clamping members 第１及び第２挟持部材の両フランジ部への装着操作を示す部分縦断面図Partial longitudinal sectional view showing the mounting operation of the first and second clamping members on both flange portions 第１及び第２挟持部材の両フランジ部への装着操作を示す部分縦断面図Partial longitudinal sectional view showing the mounting operation of the first and second clamping members on both flange portions 第１及び第２挟持部材の両フランジ部への装着状態を示す部分横断面図The partial cross section which shows the mounting state to both flange parts of the 1st and 2nd clamping member 別実施形態に係る第１及び第２挟持部材の装着状態を示す部分縦断面図Partial longitudinal cross-sectional view which shows the mounting state of the 1st and 2nd clamping member which concerns on another embodiment 別実施形態に係る第１及び第２挟持部材の装着状態を示す部分縦断面図Partial longitudinal cross-sectional view which shows the mounting state of the 1st and 2nd clamping member which concerns on another embodiment 別実施形態に係る第１及び第２挟持部材の装着状態を示す部分縦断面図Partial longitudinal cross-sectional view which shows the mounting state of the 1st and 2nd clamping member which concerns on another embodiment 別実施形態に係る第１及び第２挟持部材の装着状態を示す部分縦断面図Partial longitudinal cross-sectional view which shows the mounting state of the 1st and 2nd clamping member which concerns on another embodiment

以下、図１〜図９に基づいて、本発明の実施形態に係るフランジ接合部補強治具Ｐについて説明するが、まず、フランジ接合部補強治具Ｐが装着されるフランジ接合部について説明する。
図１及び図２は流体配管系（管路）の途中のフランジ接合部を示し、鋳鉄製の両水道管（流体管の一例）１、１の端部にそれぞれ径方向外方に円板状に延出形成された両フランジ部１Ａ、１Ｂが、リング状でシート状のガスケット（密封部材の一例）２を両フランジ部１Ａ、１Ｂ間に介装させた状態で、複数の連結ボルト４Ａ及び連結ナット４Ｂ（本実施形態では、８ヶずつ）により連結されている。両フランジ部１Ａ、１Ｂには、フランジ接合方向（軸方向）に貫通する複数の貫通孔３（本実施形態では、８ヶ所ずつ）が周方向で等間隔に形成され、これら貫通孔３に連結ボルト４Ａが挿通されて、当該連結ボルト４Ａの雄ネジ部の先端側に連結ナット４Ｂが螺合固定される。なお、本実施形態の両フランジ部１Ａ、１Ｂは、いわゆるＲＦ形フランジである。 Hereinafter, the flange joint portion reinforcing jig P according to the embodiment of the present invention will be described with reference to FIGS. 1 to 9. First, the flange joint portion to which the flange joint portion reinforcing jig P is mounted will be described.
1 and 2 show a flange joint part in the middle of a fluid piping system (pipe), and a circular iron plate is formed radially outward at both ends of cast iron water pipes (an example of a fluid pipe) 1 and 1, respectively. The flange portions 1A, 1B formed to extend to each other include a plurality of connecting bolts 4A and a ring-shaped sheet-like gasket (an example of a sealing member) 2 interposed between the flange portions 1A, 1B. They are connected by connecting nuts 4B (in this embodiment, 8 pieces each). A plurality of through-holes 3 (8 in this embodiment) that penetrate in the flange joining direction (axial direction) are formed in both flange portions 1A and 1B at equal intervals in the circumferential direction, and are connected to these through-holes 3 The bolt 4A is inserted, and the connecting nut 4B is screwed and fixed to the distal end side of the male screw portion of the connecting bolt 4A. In addition, both flange parts 1A and 1B of this embodiment are what is called RF type flanges.

また、両フランジ１Ａ、１Ｂのうち一方側のフランジ部１Ａには、流体管１を介して当該流体管１の外径よりも大径で且つ当該フランジ部１Ａの外径よりも小径（図１では、各連結ボルト４Ａの中心を結ぶ円と略同径の外径）の空気弁（流体機器の一例）Ｖが接続されている。また、図１に示すフランジ１Ａに水道管１を介して接続される空気弁Ｖは、水道管１の部位が非常に短く形成されているため、水道管１の軸方向において当該フランジ部１Ａに近接した位置に配置されている。   In addition, the flange portion 1A on one side of the flanges 1A and 1B has a diameter larger than the outer diameter of the fluid tube 1 through the fluid tube 1 and smaller than the outer diameter of the flange portion 1A (FIG. 1). Then, an air valve (an example of a fluid device) V having an outer diameter substantially the same diameter as a circle connecting the centers of the connecting bolts 4A is connected. Further, the air valve V connected to the flange 1A shown in FIG. 1 via the water pipe 1 is formed so that the portion of the water pipe 1 is very short. It is arranged at a close position.

ここで、以下では、両フランジ部１Ａ、１Ｂにおいて、それぞれ水道管１が突出する側の面を外側面１ａ、１ａとし、両フランジ部１Ａ、１Ｂが連結ボルト４Ａ及び連結ナット４Ｂにより連結された際にフランジ接合方向（軸方向）で相互に対向する面を接合面１ｂ、１ｂとし、さらに、両フランジ部１Ａ、１Ｂの径方向外方側の面を外周面１ｃ、１ｃとして説明する。   Here, in the following, in both flange portions 1A and 1B, the surfaces on which the water pipe 1 protrudes are referred to as outer surfaces 1a and 1a, and both flange portions 1A and 1B are connected by a connecting bolt 4A and a connecting nut 4B. In this case, the surfaces facing each other in the flange joining direction (axial direction) are referred to as joining surfaces 1b and 1b, and the radially outward surfaces of both flange portions 1A and 1B are described as outer peripheral surfaces 1c and 1c.

図３〜図９に示すように、フランジ接合部補強治具Ｐは、上述のようにボルト連結されている両フランジ部１Ａ、１Ｂにおいて、フランジ部１Ｂの外側面１ａに当接可能な押圧部５ｇを備えた第１挟持部材５及びフランジ部１Ａの外側面１ａに当接可能な押圧部６ｇを備えた第２挟持部材６と、これら第１挾持部材５の押圧部５ｇ及び第２挟持部材６の押圧部６ｇを両フランジ部１Ａ、１Ｂの外側面１ａ、１ａにそれぞれ当て付けた状態で、当該第１挾持部材５及び第２挟持部材６をフランジ接合方向（軸方向）に引き寄せて締付固定する締結手段７とを備える。   As shown in FIGS. 3 to 9, the flange joint reinforcing jig P is a pressing portion that can contact the outer surface 1 a of the flange portion 1 </ b> B in both flange portions 1 </ b> A and 1 </ b> B that are bolted as described above. The first clamping member 5 provided with 5g and the second clamping member 6 provided with the pressing part 6g capable of contacting the outer surface 1a of the flange part 1A, and the pressing part 5g and the second clamping member of the first clamping member 5 6 is pressed against the outer surfaces 1a and 1a of the flange portions 1A and 1B, and the first clamping member 5 and the second clamping member 6 are pulled in the flange joining direction (axial direction) and tightened. And fastening means 7 for fixing.

図３、図４、図６〜図９に示すように、第１挟持部材５は、金属材料により構成され、側面視（横断面視）で外面５ａが概略四角形状且つ内周面５ｂが円形状の概略有底角筒状（筒状の一例）に形成された内嵌合部５Ａと、内嵌合部５Ａの一端部において当該内嵌合部５Ａの外面５ａから全周に亘って外方側に延出する鍔状部５Ｂとを一体的に備えている。なお、図４（ａ）は、第１挟持部材５の側面視（横断面視）を示し、図４（ｂ）は、第１挟持部材５の縦断面視を示す。   As shown in FIGS. 3, 4, and 6 to 9, the first clamping member 5 is made of a metal material, and the outer surface 5 a is a substantially square shape and the inner peripheral surface 5 b is a circle in a side view (transverse view). An inner fitting portion 5A formed in a substantially bottomed rectangular tube shape (an example of a tubular shape) and an outer end of the inner fitting portion 5A from the outer surface 5a of the inner fitting portion 5A. It is integrally provided with a hook-like portion 5B extending toward the side. 4A shows a side view (transverse cross-sectional view) of the first holding member 5, and FIG. 4B shows a vertical cross-sectional view of the first holding member 5.

内嵌合部５Ａは、側面視で概略正方形状に形成され、内嵌合部５Ａ内には、後述する締結手段７の締結ボルト７Ａの雄ネジ部７ａを挿通可能な円筒状の筒状内部空間５ｃが形成されている。筒状内部空間５ｃの内径は、締結ボルト７Ａの雄ネジ部７ａの外径よりも若干大径に形成されている。
鍔状部５Ｂは、側面視で概略正方形状に形成され、縦断面視で中央部に上記筒状内部空間５ｃが貫通形成されている。
筒状内部空間５ｃにおいて、鍔状部５Ｂが形成された側は開口形成され、鍔状部５Ｂが形成された側とは反対側は、締結ボルト７Ａの雄ネジ部７ａが螺合可能な雌ネジ部５ｄが、内嵌合部５Ａの底部を貫通する状態で開口形成されている。すなわち、雌ネジ部５ｄは、内嵌合部５Ａにおける筒状内部空間５ｃの内周面５ｂにおいて、鍔状部５Ｂが形成された側とは反対側の端部に形成されている。 The inner fitting portion 5A is formed in a substantially square shape in a side view, and a cylindrical cylindrical inner portion into which a male screw portion 7a of a fastening bolt 7A of a fastening means 7 described later can be inserted into the inner fitting portion 5A. A space 5c is formed. The inner diameter of the cylindrical inner space 5c is slightly larger than the outer diameter of the male screw portion 7a of the fastening bolt 7A.
The bowl-shaped portion 5B is formed in a substantially square shape in a side view, and the cylindrical internal space 5c is formed through the central portion in a longitudinal sectional view.
In the cylindrical internal space 5c, an opening is formed on the side where the hook-shaped part 5B is formed, and a side opposite to the side where the hook-shaped part 5B is formed is a female screwable threaded part 7a of the fastening bolt 7A. An opening is formed in a state where the screw portion 5d penetrates the bottom portion of the inner fitting portion 5A. That is, the female screw portion 5d is formed at the end portion on the opposite side of the inner peripheral surface 5b of the cylindrical inner space 5c in the inner fitting portion 5A from the side where the flange portion 5B is formed.

図３及び図４に示すように、鍔状部５Ｂには、筒状内部空間５ｃの延出方向（フランジ接合方向（軸方向））に対して直交する方向（両フランジ部１Ａ、１Ｂの径方向）において、後述する進退部材５Ｃを挿通可能な形状の保持孔５ｅが形成され、保持孔５ｅは、内嵌合部５Ａから外方側に延出する鍔状部５Ｂの四辺（四平面）のうち対向する辺（平面）同士に亘って貫通形成されている。なお、保持孔５ｅは、筒状内部空間５ｃと直交する状態で連通するように構成されている。   As shown in FIGS. 3 and 4, the flange portion 5B has a direction (diameter of both flange portions 1A, 1B) orthogonal to the extending direction (flange joining direction (axial direction)) of the cylindrical internal space 5c. Direction), a holding hole 5e having a shape into which an advancement / retraction member 5C described later can be inserted is formed, and the holding hole 5e extends from the inner fitting part 5A to the four sides (four planes) of the flange-like part 5B. Are formed so as to penetrate between opposing sides (planes). The holding hole 5e is configured to communicate with the cylindrical inner space 5c in a state orthogonal to the cylindrical inner space 5c.

また、第１挟持部材５は、内嵌合部５Ａ及び鍔状部５Ｂとは別体の進退部材（進退手段の一例）５Ｃを備えている。進退部材５Ｃは、側面視において概略長方形状で、縦断面視において概略板状の進退部５ｆと、側面視において若干先窄み形状で、縦断面視において先端側に行くにつれて進退部５ｆよりも雌ネジ部５ｄ側に傾斜するテーパー形状の押圧部５ｇと、縦断面視で進退部５ｆよりも雌ネジ部５ｄ側とは反対側に突出する突出部５ｈとを一体的に備えている。これら押圧部５ｇ、突出部５ｈ、進退部５ｆは、先端側から基端側に向かって記載順に進退部材５Ｃに一体形成されている。   The first clamping member 5 includes an advance / retreat member (an example of advance / retreat means) 5C that is separate from the inner fitting portion 5A and the hook-like portion 5B. The advancing / retracting member 5C has a substantially rectangular shape in a side view, a substantially plate-like advance / retreat portion 5f in a longitudinal sectional view, and a slightly tapered shape in a side view, and is more advanced than the advancing / retreating portion 5f in the longitudinal sectional view. A taper-shaped pressing portion 5g that inclines toward the female screw portion 5d side and a protruding portion 5h that protrudes on the opposite side of the female screw portion 5d side with respect to the advance / retreat portion 5f in a longitudinal sectional view are integrally provided. The pressing portion 5g, the protruding portion 5h, and the advance / retreat portion 5f are integrally formed with the advance / retreat member 5C in the order of description from the distal end side to the proximal end side.

進退部材５Ｃは、進退部５ｆが鍔状部５Ｂの保持孔５ｅに挿通された挿通状態で、保持孔５ｅに沿って保持案内された状態で進退可能に構成されており、両フランジ部１Ａ、１Ｂの径方向に進退自在に構成されている。そして、進退部材５Ｃを当該径方向において径方向外方側に引退（進退部５ｆを保持孔５ｅ内に挿入する方向に移動）させると、突出部５ｈが鍔状部５Ｂにおける保持孔５ｅの開口周縁部に当接可能に構成されており、締結ボルト７Ａの雄ネジ部７ａが筒状内部空間５ｃ内に挿通されていない場合であっても、当該進退部材５Ｃの引退位置を最大引退位置に規制する最大引退位置規制部として機能するように構成されている。これにより、締結ボルト７Ａを筒状内部空間５ｃに挿通する前に、進退部材５Ｃを保持孔５ｅに仮組みしたとしても、進退部材５Ｃが保持孔５ｅから離脱することを良好に防止することができる。   The advancing / retracting member 5C is configured to be capable of advancing / retreating in a state where the advancing / retreating part 5f is inserted through the holding hole 5e of the hook-shaped part 5B and is held and guided along the holding hole 5e. It is configured to advance and retract in the radial direction of 1B. Then, when the advancing / retracting member 5C is retracted radially outward in the radial direction (moving in the direction in which the advancing / retracting portion 5f is inserted into the holding hole 5e), the protruding portion 5h opens the holding hole 5e in the hook-like portion 5B. Even when the male screw portion 7a of the fastening bolt 7A is not inserted into the cylindrical inner space 5c, the retracted position of the advance / retreat member 5C is set to the maximum retracted position. It is configured to function as a maximum retraction position restricting portion that restricts. Thereby, even if the advance / retreat member 5C is temporarily assembled in the holding hole 5e before the fastening bolt 7A is inserted into the cylindrical inner space 5c, it is possible to satisfactorily prevent the advance / retreat member 5C from being detached from the holding hole 5e. it can.

また、進退部５ｆには、側面視で当該進退部５ｆの長手方向（両フランジ部１Ａ、１Ｂの径方向）に沿って長く形成された長孔（貫通孔の一例）５ｉが、縦断面視で当該進退部５ｆを貫通する状態で開口形成されている。この長孔５ｉは、進退部５ｆが保持孔５ｅに挿通され、締結ボルト７Ａが当該長孔５ｉに挿通され且つ筒状内部空間５ｃ内に挿通された際に、縦断面視で、保持孔５ｅ内における進退部５ｆの進退により、当該締結ボルト７Ａの径方向外方側部位（図示せず）に当接して進退部５ｅの位置を最大進入位置に規制する内径側内壁部（図示せず）と、当該締結ボルト７Ａの径方向内方側部位（図示せず）に当接して進退部５ｅの位置を最大引退位置に規制する外径側内壁部（図示せず）とを備えている。つまり、長孔５ｉの内径側内壁部が進退部材５Ｃを最大引退位置に規制する最大引退位置規制部として機能し、外径側内壁部が進退部材５Ｃを最大進入位置に規制する最大進入位置規制部として機能する。
従って、図６に示すように、締結ボルト７Ａが長孔５ｉ及び筒状内部空間５ｃに挿通されると、進退部材５Ｃの押圧部５ｇは、両フランジ１Ａ、１Ｂの径方向において最大引退位置と最大進入位置との間の所定範囲Ｌ内における進退が許容される。ここで、例えば、最大進入位置は、後述する押圧部５ｇの押圧面５ｊがフランジ部１Ｂの外側面１ａにおいてガスケット２に対応する部位に設定でき、最大引退位置は、押圧部５ｇがフランジ部１Ｂの外側面１ａから離脱しない部位に設定できる。 Further, in the advance / retreat portion 5f, a long hole (an example of a through hole) 5i formed long along the longitudinal direction of the advance / retreat portion 5f (the radial direction of both flange portions 1A, 1B) in a side view is shown in a longitudinal sectional view. Thus, an opening is formed so as to penetrate the advance / retreat portion 5f. The long hole 5i has a holding hole 5e in a longitudinal sectional view when the advance / retreat portion 5f is inserted into the holding hole 5e and the fastening bolt 7A is inserted into the long hole 5i and into the cylindrical inner space 5c. An inner wall portion (not shown) on the inner diameter side that abuts against a radially outer portion (not shown) of the fastening bolt 7A and restricts the position of the advance / retreat portion 5e to the maximum entry position by the advance / retreat of the advance / retreat portion 5f. And an outer diameter side inner wall portion (not shown) that contacts the radially inner side portion (not shown) of the fastening bolt 7A and restricts the position of the advance / retreat portion 5e to the maximum retracted position. That is, the inner wall portion on the inner diameter side of the long hole 5i functions as a maximum retraction position restriction portion that restricts the advance / retreat member 5C to the maximum retraction position, and the maximum entry position restriction that the outer diameter side inner wall portion restricts the advance / retreat member 5C to the maximum entry position. It functions as a part.
Therefore, as shown in FIG. 6, when the fastening bolt 7A is inserted through the long hole 5i and the cylindrical internal space 5c, the pressing portion 5g of the advance / retreat member 5C is set to the maximum retracted position in the radial direction of both flanges 1A, 1B. Advancing and retreating within a predetermined range L between the maximum approach position is allowed. Here, for example, the maximum entry position can be set to a portion corresponding to the gasket 2 on the outer surface 1a of the flange portion 1B with a pressing surface 5j of the pressing portion 5g, which will be described later, and the pressing portion 5g is set to the flange portion 1B. It can set to the site | part which does not detach | leave from the outer side surface 1a.

押圧部５ｇには、縦断面視で雌ネジ部５ｄ側の面の先端部位に、内嵌合部５Ａの外面５ａと垂直な押圧面５ｊが形成され、当該押圧面５ｊには、フランジ部１Ｂの外側面１ａに当て付けられた際、当該外側面１ａとの摩擦保持を促進可能な加工（例えば、押圧面５ｊに細かな凹凸を形成する加工）が施されている。   The pressing portion 5g is formed with a pressing surface 5j perpendicular to the outer surface 5a of the inner fitting portion 5A at the distal end portion of the surface on the female screw portion 5d side in a longitudinal sectional view. The pressing surface 5j has a flange portion 1B. When applied to the outer surface 1a, a process capable of promoting friction retention with the outer surface 1a (for example, a process of forming fine irregularities on the pressing surface 5j) is performed.

図３、図５〜図９に示すように、第２挟持部材６は、金属部材により構成され、側面視（横断面視）で外面６ａ及び内面６ｂが概略四角形状の概略有底角筒状（筒状の一例）に形成された外嵌合部６Ａと、外嵌合部６Ａとは別体の進退部材（進退手段の一例）６Ｂとを備えて構成されている。なお、図５（ａ）は、第２挟持部材６の側面視（横断面視）を示し、図５（ｂ）は、第２挟持部材６の縦断面視を示す。   As shown in FIGS. 3 and 5 to 9, the second clamping member 6 is made of a metal member, and has a substantially bottomed rectangular tube shape in which the outer surface 6 a and the inner surface 6 b are substantially quadrangular when viewed from the side (transverse sectional view). The outer fitting part 6A formed in (an example of a cylindrical shape) and an advancing / retreating member (an example of advancing / retreating means) 6B separate from the outer fitting part 6A are configured. 5A shows a side view (transverse sectional view) of the second clamping member 6, and FIG. 5B shows a longitudinal sectional view of the second clamping member 6.

外嵌合部６Ａは、側面視で概略正方形状に形成され、外嵌合部６Ａ内には、第１挟持部材５の内嵌合部５Ａを挿入可能な筒状内部空間６ｃが形成されている。筒状内部空間６ｃは側面視（横断面視）で概略正方形状に形成され、側面視（横断面視）で概略正方形状の内嵌合部５Ａよりも若干大きく形成されている。このため、内嵌合部５Ａの外面５ａと外嵌合部６Ａの内面６ｂとの嵌合形状は、内嵌合部５Ａを外嵌合部６Ａの筒状内部空間６ｃに挿入（嵌合）させると、挿入方向（筒状内部空間６ｃの長手方向）には摺動可能であるが、挿入方向周り（筒状内部空間６ｃの長手方向に沿った軸周り）での相対回転が不能となるように形成されている。
また、外嵌合部６Ａの底部には、当該底部を筒状内部空間６ｃの延出方向（フランジ接合方向（軸方向））に沿って貫通する挿通孔６ｄが筒状内部空間６ｃに連通する状態で開口形成されており、挿通孔６ｄが形成された側とは反対側の筒状内部空間６ｃの端部は開口形成されている。挿通孔６ｄは、締結ボルト７Ａの雄ネジ部７ａを挿入可能で且つ頭部７ｂを挿通不能に形成されている。なお、締結ボルト７Ａの雄ネジ部７ａが挿通孔６ｄに挿通された状態では、雄ネジ部７ａの外周面と挿通孔６ｄの内周面との間には、所定の隙間が形成される（図６〜図８参照）。 The outer fitting portion 6A is formed in a substantially square shape in a side view, and a cylindrical inner space 6c into which the inner fitting portion 5A of the first holding member 5 can be inserted is formed in the outer fitting portion 6A. Yes. The cylindrical internal space 6c is formed in a substantially square shape in a side view (transverse cross section), and is slightly larger than the substantially square inner fitting portion 5A in a side view (transverse cross section). For this reason, the fitting shape between the outer surface 5a of the inner fitting portion 5A and the inner surface 6b of the outer fitting portion 6A is such that the inner fitting portion 5A is inserted (fitted) into the cylindrical inner space 6c of the outer fitting portion 6A. Then, it is slidable in the insertion direction (longitudinal direction of the cylindrical internal space 6c), but cannot be relatively rotated around the insertion direction (around the axis along the longitudinal direction of the cylindrical internal space 6c). It is formed as follows.
Further, an insertion hole 6d that penetrates the bottom portion along the extending direction of the cylindrical internal space 6c (flange joining direction (axial direction)) communicates with the cylindrical internal space 6c at the bottom portion of the outer fitting portion 6A. An opening is formed in the state, and the end of the cylindrical internal space 6c opposite to the side where the insertion hole 6d is formed is formed as an opening. The insertion hole 6d is formed so that the male screw portion 7a of the fastening bolt 7A can be inserted and the head portion 7b cannot be inserted. In a state where the male screw portion 7a of the fastening bolt 7A is inserted through the insertion hole 6d, a predetermined gap is formed between the outer peripheral surface of the male screw portion 7a and the inner peripheral surface of the insertion hole 6d ( 6 to 8).

外嵌合部６Ａの底部には、筒状内部空間６ｃの延出方向（フランジ接合方向（軸方向））に対して直交する方向（両フランジ部１Ａ、１Ｂの径方向）において、進退部材６Ｂを挿通可能な形状の保持孔６ｅが形成され、保持孔６ｅは、外嵌合部６Ａにおいて挿通孔６ｄ及び筒状内部空間６ｃが開口形成される面以外の四平面のうち対向する平面同士に亘って貫通形成されている。保持孔６ｅは、筒状内部空間６ｃと直交する状態で連通するように構成されている。なお、外嵌合部６Ａの底部は、挿通孔６ｄ及び筒状内部空間６ｃの延出方向（フランジ接合方向（軸方向））において、保持孔６ｅを形成可能な程度の所定の厚みを備えた形状に構成されている。   At the bottom of the outer fitting portion 6A, the advancing / retreating member 6B is in a direction (radial direction of both flange portions 1A, 1B) perpendicular to the extending direction of the cylindrical internal space 6c (flange joining direction (axial direction)). A holding hole 6e having a shape into which the insertion hole can be inserted is formed, and the holding hole 6e is formed between the opposing planes among the four planes other than the surface in which the insertion hole 6d and the cylindrical inner space 6c are formed in the outer fitting portion 6A. It is formed through. The holding hole 6e is configured to communicate in a state orthogonal to the cylindrical internal space 6c. The bottom portion of the outer fitting portion 6A has a predetermined thickness that allows the holding hole 6e to be formed in the extending direction of the insertion hole 6d and the cylindrical inner space 6c (flange joining direction (axial direction)). It is configured in shape.

進退部材６Ｂは、基本的に第１挟持部材５の進退部材５Ｃと同様の構成を備えているので、詳細な説明は省略するが、保持孔６ｅに挿通可能な進退部６ｆと、縦断面視において先端側に行くにつれて進退部６ｆよりも筒状内部空間６ｃの開口側に傾斜するテーパー形状の押圧部６ｇと、縦断面視で進退部６ｆよりも筒状内部空間６ｃの開口側とは反対側に突出する突出部６ｈとを一体的に備えている。これら押圧部６ｇ、突出部６ｈ、進退部６ｆは、先端側から基端側に向かって記載順に進退部材６Ｂに一体形成されている。また、進退部６ｆには、側面視で当該進退部６ｆの長手方向（両フランジ部１Ａ、１Ｂの径方向）に沿って長く形成された長孔（貫通孔の一例）６ｉが、縦断面視で当該進退部６ｆを貫通する状態で開口形成されている。この長孔６ｉは、進退部材５Ｃの長孔５ｉと同様に、内径側内壁部が進退部材６Ｂを最大引退位置に規制する最大引退位置規制部として機能し、外径側内壁部が進退部材６Ｂを最大進入位置に規制する最大進入位置規制部として機能する。
従って、図６に示すように、締結ボルト７Ａが長孔６ｉ及び筒状内部空間６ｃに挿通されると、進退部材６Ｂの押圧部６ｇは、両フランジ１Ａ、１Ｂの径方向において最大引退位置と最大進入位置との間の所定範囲Ｌ内における進退が許容される。ここで、例えば、最大進入位置は、後述する押圧部６ｇの押圧面６ｊがフランジ部１Ａの外側面１ａにおいてガスケット２に対応する部位に設定でき、最大引退位置は、押圧部６ｇの先端がフランジ部１Ａに接続された空気弁Ｖに接触せず且つフランジ部１Ａの外側面１ａから離脱しない部位に設定できる。 Since the advance / retreat member 6B basically has the same configuration as the advance / retreat member 5C of the first clamping member 5, a detailed description thereof is omitted, but an advance / retreat portion 6f that can be inserted into the holding hole 6e and a longitudinal sectional view. The taper-shaped pressing part 6g which inclines toward the opening side of the cylindrical internal space 6c from the advance / retreat part 6f toward the front end side and the opening side of the cylindrical internal space 6c from the advancement / retraction part 6f in the longitudinal sectional view are opposite to each other. A projecting portion 6h projecting to the side is integrally provided. The pressing portion 6g, the protruding portion 6h, and the advance / retreat portion 6f are integrally formed with the advance / retreat member 6B in the order of description from the distal end side to the proximal end side. Further, in the advance / retreat portion 6f, a long hole (an example of a through hole) 6i formed long along the longitudinal direction of the advance / retreat portion 6f (the radial direction of both flange portions 1A, 1B) in a side view is shown in a longitudinal sectional view. Thus, an opening is formed so as to penetrate the advance / retreat portion 6f. In the same way as the long hole 5i of the advance / retreat member 5C, the long hole 6i functions as a maximum retraction position restricting portion where the inner diameter side inner wall portion restricts the advance / retreat member 6B to the maximum retraction position, and the outer diameter side inner wall portion is the advance / retreat member 6B. Functions as a maximum entry position restricting unit that regulates the maximum entry position.
Therefore, as shown in FIG. 6, when the fastening bolt 7A is inserted through the long hole 6i and the cylindrical internal space 6c, the pressing portion 6g of the advance / retreat member 6B is set to the maximum retracted position in the radial direction of both flanges 1A, 1B. Advancing and retreating within a predetermined range L between the maximum approach position is allowed. Here, for example, the maximum approach position can be set at a position where a pressing surface 6j of the pressing portion 6g described later corresponds to the gasket 2 on the outer surface 1a of the flange portion 1A, and the maximum retraction position is that the tip of the pressing portion 6g is flanged. It can be set to a portion that does not come into contact with the air valve V connected to the portion 1A and does not leave the outer surface 1a of the flange portion 1A.

押圧部６ｇには、縦断面視で筒状内部空間６ｃの開口側の面の先端部位に、外嵌合部６Ａの外面６ａと垂直な押圧面６ｊが形成されている。従って、内嵌合部５Ａが外嵌合部６Ａに嵌合した状態では、押圧面５ｊ及び押圧面６ｊは筒状内部空間５ｃ、６ｃの延出方向（フランジ接合方向（軸方向））で対向するように配置されることとなる。   In the pressing portion 6g, a pressing surface 6j perpendicular to the outer surface 6a of the outer fitting portion 6A is formed at the distal end portion of the surface on the opening side of the cylindrical inner space 6c in a longitudinal sectional view. Therefore, in a state where the inner fitting portion 5A is fitted to the outer fitting portion 6A, the pressing surface 5j and the pressing surface 6j are opposed to each other in the extending direction of the cylindrical inner spaces 5c, 6c (flange joining direction (axial direction)). Will be arranged.

締結手段７は、外嵌合部６Ａの外側から挿通孔６ｄを介して筒状内部空間６ｃ内に挿入される上述の締結ボルト７Ａと、内嵌合部５Ａの内周面５ｂに形成された雌ネジ部５ｄとから構成されている。
従って、フランジ接合部補強治具Ｐでは、第１挟持部材５の押圧部５ｇ及び第２挟持部材６の押圧部６ｇの相対位置を、両フランジ部１Ａ、１Ｂのフランジ接合方向において適宜調整することができる。
具体的には、図６に示すように、第１挟持部材５の内嵌合部５Ａの保持孔５ｅに進退部材５Ｃの進退部５ｆを挿通するとともに、第２挟持部材６の外嵌合部６Ａの保持孔６ｅに進退部材６Ｂの進退部６ｆを挿通して、内嵌合部５Ａを外嵌合部６Ａ内に嵌合し、締結ボルト７Ａの雄ネジ部７ａを外嵌合部６Ａの挿通孔６ｄを介して内嵌合部５Ａの雌ネジ部５ｄに螺合した状態において、両フランジ部１Ａ、１Ｂのフランジ接合方向において内嵌合部５Ａと外嵌合部６Ａとの嵌合位置（嵌合距離）を所定の移動範囲Ｍ内で適宜調節可能に構成されている。これにより、フランジ接合方向における両フランジ部１Ａ、１Ｂの厚みに応じて、内嵌合部５Ａと外嵌合部６Ａとの重なり部位の大きさ（嵌合距離）、及び、両押圧面５ｊ、６ｊの相対位置（相対間隔）を適宜調整して、両押圧面５ｊ、６ｊを各別に両フランジ部１Ａ、１Ｂの外側面１ａ、１ａに当て付けた状態で、締結ボルト７Ａの雄ネジ部７ａと内嵌合部５Ａの雌ネジ部５ｄとを螺合固定し、第１挟持部材５及び第２挟持部材６を両フランジ部１Ａ、１Ｂに装着することができる。 The fastening means 7 is formed on the above-described fastening bolt 7A that is inserted into the cylindrical inner space 6c from the outside of the outer fitting portion 6A through the insertion hole 6d, and the inner peripheral surface 5b of the inner fitting portion 5A. It is comprised from the internal thread part 5d.
Therefore, in the flange joint reinforcement jig P, the relative positions of the pressing part 5g of the first clamping member 5 and the pressing part 6g of the second clamping member 6 are appropriately adjusted in the flange joining direction of both flange parts 1A and 1B. Can do.
Specifically, as shown in FIG. 6, the advancing / retreating portion 5 f of the advancing / retreating member 5 C is inserted into the holding hole 5 e of the inner fitting portion 5 A of the first clamping member 5 and the outer fitting portion of the second clamping member 6 is inserted. The advance / retreat portion 6f of the advance / retreat member 6B is inserted into the holding hole 6e of 6A, the inner fitting portion 5A is fitted into the outer fitting portion 6A, and the male screw portion 7a of the fastening bolt 7A is fitted to the outer fitting portion 6A. The fitting position of the inner fitting portion 5A and the outer fitting portion 6A in the flange joining direction of both flange portions 1A and 1B in a state where the inner screw portion 5d of the inner fitting portion 5A is screwed through the insertion hole 6d. The (fitting distance) is configured to be appropriately adjustable within a predetermined movement range M. Thereby, according to the thickness of both flange part 1A, 1B in a flange joining direction, the magnitude | size (fitting distance) of the overlapping part of 5 A of inner fitting parts and 6 A of outer fitting parts, and both press surface 5j, The male screw portion 7a of the fastening bolt 7A is adjusted with the relative position (relative interval) of 6j appropriately adjusted so that the pressing surfaces 5j, 6j are respectively applied to the outer surfaces 1a, 1a of the flange portions 1A, 1B. And the female screw part 5d of the inner fitting part 5A can be screwed and fixed, and the first clamping member 5 and the second clamping member 6 can be attached to both flange parts 1A and 1B.

次に、複数の連結ボルト４Ａ及び連結ナット４Ｂにより連結された両フランジ部１Ａ、１Ｂに、フランジ接合部補強治具Ｐを装着する作業工程について説明する。   Next, an operation process for mounting the flange joint reinforcing jig P on both flange portions 1A and 1B connected by a plurality of connecting bolts 4A and connecting nuts 4B will be described.

図３、図６〜図８に示すように、まず、第１挟持部材５の保持孔５ｅに進退部材５Ｃの進退部５ｆを挿通し且つ第２挟持部材６の保持孔６ｅに進退部材６Ｂの進退部６ｆを挿通するとともに、フランジ接合方向で相対向する部位に形成されている第１挟持部材５の内嵌合部５Ａ及び第２挟持部材６の外嵌合部６Ａを、内嵌合部５Ａの底部側（雌ネジ部５ｄ側）から当該内嵌合部５Ａが外嵌合部６Ａの筒状内部空間６ｃに内嵌するように、両フランジ部１Ａ、１Ｂの外周面１ｃ、１ｃよりも径方向外方側の位置でフランジ接合方向から嵌合させる。
この際には、内嵌合部５Ａの外面５ａと外嵌合部６Ａの内面６ｂとが横断面視で相対回転不能な概略正方形状に形成されているので、第１挟持部材５の押圧部５ｇと第２挟持部材６の押圧部６ｇとを同方向に延出させた状態で、容易に嵌合させることができる。
また、進退部材５Ｃを、進退部材５Ｃの突出部５ｈが保持孔５ｅの開口周縁部に当接する程度に挿入し、進退部材６Ｂを、進退部材６Ｂの突出部６ｈが保持孔６ｅの開口周縁部に当接する程度に挿入しておくと、両進退部材５Ｃ、６Ｂが各保持孔５ｅ、６ｅから離脱することを良好に防止できる。 As shown in FIGS. 3 and 6-8, first, the advance / retreat portion 5f of the advance / retreat member 5C is inserted into the holding hole 5e of the first holding member 5 and the advance / retreat member 6B of the second holding member 6 is inserted into the holding hole 6e. The inner fitting portion 5A of the first clamping member 5 and the outer fitting portion 6A of the second clamping member 6 that are inserted in the advancing / retreating portion 6f and are formed at portions facing each other in the flange joining direction are connected to the inner fitting portion. From the outer peripheral surfaces 1c and 1c of both flange portions 1A and 1B so that the inner fitting portion 5A is fitted into the cylindrical inner space 6c of the outer fitting portion 6A from the bottom side (the female screw portion 5d side) of 5A. Is also fitted from the flange joining direction at a position radially outward.
At this time, since the outer surface 5a of the inner fitting portion 5A and the inner surface 6b of the outer fitting portion 6A are formed in a substantially square shape that is not relatively rotatable in a cross-sectional view, the pressing portion of the first clamping member 5 5g and the pressing part 6g of the 2nd clamping member 6 can be easily fitted in the state extended in the same direction.
Further, the advancing / retreating member 5C is inserted so that the protruding portion 5h of the advancing / retreating member 5C comes into contact with the opening peripheral portion of the holding hole 5e, and the advancing / retreating member 6B is inserted into the protruding peripheral portion 6h of the holding hole 6e. If it is inserted so as to be in contact with the two, it is possible to satisfactorily prevent the both advancing and retracting members 5C and 6B from being detached from the holding holes 5e and 6e.

図７に示すように、両進退部材５Ｃ、６Ｂが各保持孔５ｅ、６ｅに挿入され、内嵌合部５Ａと外嵌合部６Ａとが嵌合している状態において、縦断面視で進退部材５Ｃの進退部５ｆ及び押圧部５ｇと内嵌合部５Ａの外面５ａと進退部材６Ｂの進退部６ｆ及び押圧部６ｇと外嵌合部６Ａの外面６ａとにより概略Ｕ字形状の凹部Ｃが形成され、当該凹部Ｃを、両フランジ部１Ａ、１Ｂにおける周方向におけるボルト連結箇所の隣接間部位に対して径方向外方から外嵌装着可能に構成されている。そのため、上述の内嵌合部５Ａと外嵌合部６Ａとの嵌合は、一旦、フランジ接合方向において、第１挟持部材５の押圧部５ｇの押圧面５ｊと第２挟持部材６の押圧部６ｇの押圧面６ｊとの間隔が、フランジ部１Ａの外側面１ａとフランジ部１Ｂの外側面１ａとの間隔よりも大きくなる程度に行われ、この状態で、締結ボルト７Ａの雄ネジ部７ａを、フランジ接合方向における外嵌合部６Ａの外側から挿通孔６ｄを介して筒状内部空間６ｃ内に挿入し、当該締結ボルト７Ａの頭部７ｂが外嵌合部６Ａの外側面（図示せず）に当接するまで、筒状内部空間６ｃに嵌合されている内嵌合部５Ａの雌ネジ部５ｄに螺合させ、内嵌合部５Ａ及び外嵌合部６Ａを仮固定する。   As shown in FIG. 7, in the state in which both the advancing and retracting members 5C and 6B are inserted into the holding holes 5e and 6e and the inner fitting portion 5A and the outer fitting portion 6A are fitted, they are advanced and retracted in a longitudinal sectional view. A substantially U-shaped recess C is formed by the advancing / retreating part 5f and the pressing part 5g of the member 5C, the outer surface 5a of the inner fitting part 5A, and the advancing / retreating part 6f and the pressing part 6g of the advancing / retracting member 6B and the outer surface 6a of the outer fitting part 6A. The concave portion C is formed and can be externally fitted from the outside in the radial direction to the adjacent portion of the bolt connecting portion in the circumferential direction in both flange portions 1A, 1B. Therefore, the above-described fitting between the inner fitting portion 5A and the outer fitting portion 6A is performed once in the flange joining direction by pressing the pressing surface 5j of the pressing portion 5g of the first holding member 5 and the pressing portion of the second holding member 6. The gap between the pressing surface 6j of 6g and the outer surface 1a of the flange portion 1A and the outer surface 1a of the flange portion 1B is larger than the interval between the outer surface 1a of the flange portion 1A. Then, it is inserted into the cylindrical inner space 6c from the outside of the outer fitting portion 6A in the flange joining direction through the insertion hole 6d, and the head 7b of the fastening bolt 7A is connected to the outer surface (not shown) of the outer fitting portion 6A. Until the inner fitting portion 5A is fitted into the cylindrical inner space 6c, the inner fitting portion 5A and the outer fitting portion 6A are temporarily fixed.

そして、凹部Ｃを両フランジ部１Ａ、１Ｂのボルト連結箇所の隣接間部位に対して外嵌装着する際には、進退部材６Ｂが延出する側における外嵌合部６Ａの外面６ａ（凹部Ｃの一部）を、両フランジ部１Ａ、１Ｂの外周面１ｃ、１ｃの少なくとも一方に当接させることで、第１挟持部材５及び第２挟持部材６を所期の設定外嵌装着位置に装着することができる（図８及び図９参照）。すなわち、進退部材６Ｂが延出する側における外嵌合部６Ａの外面６ａが、両フランジ部１Ａ、１Ｂの外周面１ｃ、１ｃとの当接によって設定外嵌装着位置に規制する装着規制部として機能することとなる。   When the recessed portion C is externally fitted to the adjacent portions of the bolt connecting portions of the flange portions 1A and 1B, the outer surface 6a (recessed portion C) of the outer fitting portion 6A on the side where the advance / retreat member 6B extends. 1 part) is brought into contact with at least one of the outer peripheral surfaces 1c and 1c of both flange portions 1A and 1B, so that the first clamping member 5 and the second clamping member 6 are mounted at the desired setting external fitting mounting position. (See FIGS. 8 and 9). That is, the outer surface 6a of the outer fitting portion 6A on the side where the advance / retreat member 6B extends is an attachment restriction portion that restricts the set outer fitting position by contact with the outer peripheral surfaces 1c, 1c of both flange portions 1A, 1B. Will function.

第１挟持部材５及び第２挟持部材６の設定外嵌装着位置への装着に伴って、第１挟持部材５の進退部材５Ｃをフランジ部１Ｂの径方向に進退させて、押圧部５ｇの押圧面５ｊを当該フランジ部１Ｂの外側面１ａにおいてガスケット２に対応する部位に位置させるとともに、第２挟持部材６の進退部材６Ｂをフランジ１Ａの径方向に進退させて、押圧部６ｇの先端が空気弁Ｖの外周面に接触せず且つ押圧面６ｊが当該フランジ部１Ａの外側面１ａに当て付けられる部位に位置させる（図８及び図９参照）。   As the first clamping member 5 and the second clamping member 6 are mounted to the set external fitting mounting position, the advancing / retracting member 5C of the first clamping member 5 is advanced and retracted in the radial direction of the flange portion 1B, and the pressing portion 5g is pressed. The surface 5j is positioned at a portion corresponding to the gasket 2 on the outer surface 1a of the flange portion 1B, and the advancing / retracting member 6B of the second clamping member 6 is advanced / retracted in the radial direction of the flange 1A. The pressing surface 6j is positioned at a portion that does not contact the outer peripheral surface of the valve V and is applied to the outer surface 1a of the flange portion 1A (see FIGS. 8 and 9).

続いて、第１挟持部材５及び第２挟持部材６が設定外嵌装着位置に装着され、押圧面５ｊが上述した位置でフランジ部１Ｂの外側面１ａに当接し且つ押圧面６ｊが上述した位置でフランジ部１Ａの外側面１ａに当接するまで、締結ボルト７Ａの雄ネジ部７ａを内嵌合部５Ａの雌ネジ部５ｄに螺合させて締付固定し、内嵌合部５Ａ及び外嵌合部６Ａをフランジ接合方向で引き寄せて内嵌合部５Ａを外嵌合部６Ａの筒状内部空間６ｃに嵌合させる（図８参照）。   Subsequently, the first clamping member 5 and the second clamping member 6 are mounted at the set external fitting mounting position, the pressing surface 5j contacts the outer surface 1a of the flange portion 1B at the position described above, and the pressing surface 6j is the position described above. Until the outer surface 1a of the flange portion 1A comes into contact with the inner threaded portion 5d of the inner fitting portion 5A and screwed into the inner threaded portion 5a. The mating portion 6A is pulled in the flange joining direction to fit the inner fitting portion 5A into the cylindrical inner space 6c of the outer fitting portion 6A (see FIG. 8).

従って、フランジ接合部補強治具Ｐを両フランジ部１Ａ、１Ｂに装着する際に、両押圧部５ｇ、６ｇを内嵌合部５Ａ又は外嵌合部６Ａに対して両フランジ部１Ａ、１Ｂの径方向に進退させて、両押圧部５ｇ、６ｇが両フランジ部１Ａ、１Ｂの外側面１ａ、１ａに各別に当て付けられる位置を適宜調整することができる。
これにより、図１、図７及び図８に示すように、一方のフランジ部１Ａに接続された空気弁Ｖの外径が当該フランジ部１Ａに接続される水道管１の外径よりも大径で、しかも、空気弁Ｖと当該フランジ部１Ａとが水道管１の管軸方向において近接する場合であっても、第２挟持部材６の押圧部６ｇをフランジ部１Ａの径方向外方側に適宜引退させることで、当該押圧部６ｇが空気弁Ｖに干渉しない状態で第１挟持部材５及び第２挟持部材６を両フランジ部１Ａ、１Ｂに装着することができる。また、空気弁Ｖが接続されていない他方のフランジ部１Ｂにおいては、第１挟持部材５の押圧部５ｇをフランジ部１Ｂの径方向内方側に適宜進入させることで、当該押圧部５ｇの押圧面５ｊを所期の装着位置であるガスケット２に対応する部位に位置させた状態で装着させることができる。
よって、フランジ部１Ａに空気弁Ｖが接続されている場合であっても第１挟持部材５及び第２挟持部材６を確実に装着することができ、しかも、第１挟持部材５の押圧部５ｇの押圧面５ｊによりフランジ接合方向においてフランジ部１Ｂの外側面１ａを介してガスケット２を確実に押圧することができる。 Accordingly, when the flange joint reinforcing jig P is attached to both the flange portions 1A and 1B, the both pressing portions 5g and 6g are connected to the inner fitting portion 5A or the outer fitting portion 6A. By moving forward and backward in the radial direction, the positions at which the pressing portions 5g and 6g are respectively applied to the outer surfaces 1a and 1a of the flange portions 1A and 1B can be appropriately adjusted.
Thereby, as shown in FIG.1, FIG7 and FIG.8, the outer diameter of the air valve V connected to one flange part 1A is larger than the outer diameter of the water pipe 1 connected to the said flange part 1A. In addition, even when the air valve V and the flange portion 1A are close to each other in the pipe axis direction of the water pipe 1, the pressing portion 6g of the second clamping member 6 is placed on the radially outer side of the flange portion 1A. By appropriately retracting, the first clamping member 5 and the second clamping member 6 can be attached to both flange portions 1A and 1B in a state where the pressing portion 6g does not interfere with the air valve V. Further, in the other flange portion 1B to which the air valve V is not connected, the pressing portion 5g of the first clamping member 5 is appropriately entered into the radially inward side of the flange portion 1B, thereby pressing the pressing portion 5g. The surface 5j can be mounted in a state where the surface 5j is positioned at a portion corresponding to the gasket 2 which is an intended mounting position.
Therefore, even when the air valve V is connected to the flange portion 1A, the first clamping member 5 and the second clamping member 6 can be reliably mounted, and the pressing portion 5g of the first clamping member 5 can be mounted. The pressing surface 5j can reliably press the gasket 2 via the outer surface 1a of the flange portion 1B in the flange joining direction.

また、両押圧部５ｇ、６ｇをそれぞれ両フランジ部１Ａ、１Ｂの外側面１ａ、１ａに当て付けた状態で第１挟持部材５及び第２挟持部材６をフランジ接合方向に引き寄せて、内嵌合部５Ａが外嵌合部６Ａ内に嵌合し、内嵌合部５Ａと外嵌合部６Ａとがフランジ接合方向（軸方向）で重なった状態で、締付固定することができるとともに、この締付固定された状態では、進退部材６Ｂが延出する側における外嵌合部６Ａの外面６ａが、両フランジ部１Ａ、１Ｂの外周面１ｃ、１ｃの少なくとも一方に当接した状態となる。
さらに、締付固定した状態では、内嵌合部５Ａの雌ネジ部５ｄが、締結ボルト７Ａの頭部７ｂに近接した位置に位置することから、雌ネジ部５ｄと締結ボルト７Ａの雄ネジ部７ａとの螺合箇所が、締結ボルト７Ａの頭部７ｂが外嵌合部６Ａの外側面と当接する位置に近接することとなり、フランジ接合方向（軸方向）における締結ボルト７Ａの頭部７ｂと当該螺合箇所との距離を比較的小さくすることができる。これにより、両フランジ部１Ａ、１Ｂに曲げ方向（径方向）或いは引張方向（軸方向）の力が作用した場合でも、締結ボルト７Ａの伸びや破壊を良好に防止することができ、両フランジ部１Ａ，１Ｂの離間やずれ及びこれらに伴う流体の漏洩を良好に防止することができる。さらに、雌ネジ部５ｄを筒状内部空間５ｃ、６ｃ内における内嵌合部５Ａと外嵌合部６Ａとの重なり部位に位置させることができ、締結ボルト７Ａの長さを比較的短くすることが可能となり、締結ボルト７Ａの先端が筒状内部空間５ｃ、６ｃの外部に突出することを良好に防止することができ、フランジ接合部補強治具Ｐの外観を損なうことなく省スペース化を図ることができる。 Further, the first clamping member 5 and the second clamping member 6 are pulled in the flange joining direction with the both pressing portions 5g and 6g being applied to the outer surfaces 1a and 1a of the flange portions 1A and 1B, respectively, and are fitted inside. The portion 5A is fitted in the outer fitting portion 6A, and the inner fitting portion 5A and the outer fitting portion 6A can be tightened and fixed in a state where they overlap in the flange joining direction (axial direction). In the clamped and fixed state, the outer surface 6a of the outer fitting portion 6A on the side where the advance / retreat member 6B extends is in contact with at least one of the outer peripheral surfaces 1c and 1c of the flange portions 1A and 1B.
Further, in the state of being fastened and fixed, the female screw portion 5d of the inner fitting portion 5A is located at a position close to the head portion 7b of the fastening bolt 7A, and therefore, the female screw portion 5d and the male screw portion of the fastening bolt 7A. 7a is close to the position where the head 7b of the fastening bolt 7A contacts the outer surface of the outer fitting portion 6A, and the head 7b of the fastening bolt 7A in the flange joining direction (axial direction) The distance from the screwing location can be made relatively small. Thereby, even when a force in the bending direction (radial direction) or the tensile direction (axial direction) acts on both flange portions 1A, 1B, it is possible to prevent the fastening bolt 7A from being stretched and broken satisfactorily. It is possible to satisfactorily prevent separation and displacement of 1A and 1B and fluid leakage associated therewith. Further, the female screw portion 5d can be positioned at the overlapping portion of the inner fitting portion 5A and the outer fitting portion 6A in the cylindrical inner spaces 5c, 6c, and the length of the fastening bolt 7A is made relatively short. It is possible to satisfactorily prevent the tip of the fastening bolt 7A from protruding outside the cylindrical inner spaces 5c, 6c, and to save space without impairing the appearance of the flange joint reinforcing jig P. be able to.

次に、上記フランジ接合部補強治具Ｐを装着後、両フランジ部１Ａ、１Ｂにおける、その他の全てのボルト連結箇所の隣接間部位に対して、別のフランジ接合部補強治具Ｐを径方向外方から順次外嵌装着する。なお、当該外嵌装着は、必要に応じて、ボルト連結箇所の隣接間部位の一部に対してのみ行うこととしてもよい。   Next, after mounting the flange joint reinforcement jig P, another flange joint reinforcement jig P is radially attached to the adjacent portions of all other bolt connection locations in the flange portions 1A and 1B. Fit sequentially from the outside. In addition, it is good also as performing the said external fitting mounting | wearing only with respect to a part of site | part between adjacent bolt connection locations as needed.

これにより、第１挟持部材５及び第２挟持部材６が締結手段７により締付固定された状態で、両フランジ部１Ａ、１Ｂに曲げ方向（径方向）への力が作用した場合でも、締結手段７の締結部位に加えて、内嵌合部５Ａと外嵌合部６Ａとの重なり部位でも当該力を受け止めることができ、締結手段７の締結部位に掛かる応力の低減を図ることができる。また、第１挟持部材５及び第２挟持部材６が締結手段７により締付固定された状態では、内嵌合部５Ａが内嵌された外嵌合部６Ａの外面が両フランジ部１Ａ、１Ｂの外周面１ｃ、１ｃの少なくとも一方に当接しているので、両フランジ部１Ａ、１Ｂに曲げ方向（径方向）の力が作用した場合には、当該外嵌合部６Ａの外面６ａと両フランジ部１Ａ、１Ｂの外周面１ｃ、１ｃとの当接箇所でも当該力を受け止めることができ、締結手段７、内嵌合部５Ａと外嵌合部６Ａとの重なり部位に掛かる応力の低減を図ることができる。さらに、締結ボルト７Ａの雄ネジ部７ａが挿通孔６ｄに挿通された状態では、雄ネジ部７ａの外周面と挿通孔６ｄの内周面との間に所定の隙間が形成されるので、両フランジ部１Ａ、１Ｂに曲げ方向（径方向）への力が作用して、万が一、締結ボルト７Ａが径方向に若干変位した場合でも、当該所定の隙間程度の変位であれば、締結ボルト７Ａの雄ネジ部７ａが挿通孔６ｄに当接することがなく、締結ボルト７Ａの伸びや破壊を防止することができる。   Thus, even when a force in the bending direction (radial direction) acts on both flange portions 1A and 1B in a state where the first clamping member 5 and the second clamping member 6 are clamped and fixed by the fastening means 7, the fastening is performed. In addition to the fastening part of the means 7, the force can be received even at the overlapping part of the inner fitting part 5A and the outer fitting part 6A, and the stress applied to the fastening part of the fastening means 7 can be reduced. In the state where the first clamping member 5 and the second clamping member 6 are fastened and fixed by the fastening means 7, the outer surface of the outer fitting portion 6A into which the inner fitting portion 5A is fitted is the two flange portions 1A, 1B. When the force in the bending direction (radial direction) acts on both flange portions 1A and 1B, the outer surface 6a and both flanges of the outer fitting portion 6A are in contact with at least one of the outer peripheral surfaces 1c and 1c. The force can be received even at locations where the portions 1A and 1B are in contact with the outer peripheral surfaces 1c and 1c, and the stress applied to the overlapping portion of the fastening means 7, the inner fitting portion 5A and the outer fitting portion 6A is reduced. be able to. Further, in a state where the male screw portion 7a of the fastening bolt 7A is inserted into the insertion hole 6d, a predetermined gap is formed between the outer peripheral surface of the male screw portion 7a and the inner peripheral surface of the insertion hole 6d. Even if a force in the bending direction (radial direction) acts on the flange portions 1A and 1B and the fastening bolt 7A is slightly displaced in the radial direction, if the displacement is about the predetermined gap, the fastening bolt 7A The male screw portion 7a does not come into contact with the insertion hole 6d, and the fastening bolt 7A can be prevented from being stretched or broken.

従って、フランジ接合部補強治具Ｐを、両フランジ部１Ａ、１Ｂに容易且つ確実に装着できるとともに、フランジ接合部補強治具Ｐによる両フランジ部１Ａ、１Ｂの接合強度をより向上させて、両フランジ部１Ａ、１Ｂを含む流体管路を所定の耐震性能（離脱防止力が３ＤｋＮ以上（Ｄは呼び径））を備えた耐震管路に補強しつつ、しかも、両フランジ部１Ａ、１Ｂの離間やずれを簡便且つ安価に防止することができる。   Therefore, the flange joint reinforcement jig P can be easily and reliably attached to both flange parts 1A and 1B, and the joint strength of both flange parts 1A and 1B by the flange joint reinforcement jig P can be further improved. While reinforcing the fluid conduit including the flange portions 1A and 1B to a seismic conduit having a predetermined seismic performance (with an anti-separation force of 3DkN or more (D is a nominal diameter)), the two flange portions 1A and 1B are separated. Misalignment can be easily and inexpensively prevented.

また、フランジ接合部補強治具Ｐは、筒状に構成された外嵌合部６Ａ内に内嵌合部５Ａが嵌合し、さらに、内嵌合部５Ａ内の筒状内部空間５ｃに締結手段７の締結ボルト７Ａが挿通されるので、両フランジ部１Ａ、１Ｂの外周面１ｃ、１ｃの径方向外方側位置にある内嵌合部５Ａ及び外嵌合部６Ａの配設箇所と、締結ボルト７Ａの配設箇所とを兼用することができる。これにより、両フランジ部１Ａ、１Ｂに装着されたフランジ接合部補強治具Ｐ及び締結ボルト７Ａのフランジ接合方向（軸方向）での寸法、及び、当該フランジ接合部補強治具Ｐの径方向外方側（径方向）での寸法の何れをも小さくすることができ、省スペース化を図ることができる。   Further, the flange joint reinforcing jig P has an inner fitting portion 5A fitted into a cylindrical outer fitting portion 6A, and is further fastened to a cylindrical inner space 5c in the inner fitting portion 5A. Since the fastening bolt 7A of the means 7 is inserted, the locations of the inner fitting portion 5A and the outer fitting portion 6A at the radially outer side positions of the outer peripheral surfaces 1c, 1c of both flange portions 1A, 1B, It can also serve as a place where the fastening bolt 7A is disposed. Thereby, the dimension in the flange joining direction (axial direction) of the flange joint reinforcement jig P and the fastening bolt 7A attached to both flange parts 1A, 1B, and the radial outside of the flange joint reinforcement jig P Any of the dimensions on the side (radial direction) can be reduced, and space can be saved.

ここで、上述のとおり、フランジ接合部補強治具Ｐは、第１挟持部材５の内嵌合部５Ａと第２挟持部材６の外嵌合部６Ａとのフランジ接合方向（軸方向）における重なり部位の大きさ（嵌合距離）を所定範囲内で任意に調整することで、第１挟持部材５の押圧部５ｇの押圧面５ｊと第２挟持部材６の押圧部６ｇの押圧面６ｊとの間隔を所定範囲内で任意に調整可能に構成されている。
このため、両フランジ部１Ａ、１Ｂの呼び径や設計圧力に応じて、両フランジ部１Ａ、１Ｂの肉厚が変更される場合、例えば、図１０に示すように、両フランジ部１Ａ、１Ｂの肉厚よりも厚い肉厚の両フランジ部１０Ａ、１０Ｂにフランジ接合部補強治具Ｐを装着する場合であっても、内嵌合部５Ａと外嵌合部６Ａとの重なり部位の大きさ（嵌合距離）を調整（図１０では、嵌合距離を小さく調整）することで、第１挟持部材５の押圧部５ｇの押圧面５ｊをフランジ部１０Ａの外側面１０ａに当接させ且つ第２挟持部材６の押圧部６ｇの押圧面６ｊをフランジ部１０Ｂの外側面１０ａに当接させた状態で、内嵌合部５Ａの雌ネジ部５ｄに締結ボルト７Ａの雄ネジ部７ａを螺合させて内嵌合部５Ａ及び外嵌合部６Ａ、ひいては、第１挟持部材５及び第２挟持部材６を両フランジ部１０Ａ、１０Ｂに良好に締付固定することができる。なお、第１挟持部材５の進退部材５Ｃ及び第２挟持部材６の進退部材６Ｂは、両フランジ部１０Ａ、１０Ｂの径方向に進退自在に構成されているが、両進退部材５Ｃ、６Ｂの両押圧面５ｊ、６ｊの夫々は、両フランジ部１０Ａ、１０Ｂの外側面１０ａ、１０ａにおいて、ガスケット（密封部材の一例）１０Ｃに対応する部位（最大進入位置）で当て付けられるように構成されている。即ち、両押圧面５ｊ、６ｊは、両フランジ１０Ａ、１０Ｂの径方向においてほぼ同位置となるように位置が調整されている。なお、両フランジ部１０Ａ、１０Ｂは、いわゆるＧＦ形フランジである。 Here, as described above, the flange joint reinforcing jig P is overlapped in the flange joining direction (axial direction) between the inner fitting portion 5A of the first holding member 5 and the outer fitting portion 6A of the second holding member 6. By arbitrarily adjusting the size (fitting distance) of the part within a predetermined range, the pressing surface 5j of the pressing part 5g of the first clamping member 5 and the pressing surface 6j of the pressing part 6g of the second clamping member 6 The interval can be arbitrarily adjusted within a predetermined range.
For this reason, when the thickness of both flange parts 1A and 1B is changed according to the nominal diameter and design pressure of both flange parts 1A and 1B, for example, as shown in FIG. Even when the flange joint reinforcing jig P is attached to both flange portions 10A and 10B having a thickness greater than the thickness, the size of the overlapping portion between the inner fitting portion 5A and the outer fitting portion 6A ( By adjusting the fitting distance) (in FIG. 10, the fitting distance is adjusted to be small), the pressing surface 5j of the pressing portion 5g of the first clamping member 5 is brought into contact with the outer surface 10a of the flange portion 10A and the second In a state where the pressing surface 6j of the pressing portion 6g of the clamping member 6 is in contact with the outer surface 10a of the flange portion 10B, the male screw portion 7a of the fastening bolt 7A is screwed into the female screw portion 5d of the inner fitting portion 5A. The inner fitting portion 5A and the outer fitting portion 6A, and thus the first clamping member 5 Beauty second clamping member 6 both flanges 10A, it can be satisfactorily fastened to 10B. The forward / backward member 5C of the first clamping member 5 and the forward / backward member 6B of the second clamping member 6 are configured to be movable back and forth in the radial direction of both flange portions 10A and 10B. Each of the pressing surfaces 5j and 6j is configured to be applied at a portion (maximum entry position) corresponding to the gasket (an example of a sealing member) 10C on the outer surfaces 10a and 10a of both flange portions 10A and 10B. . That is, the positions of the pressing surfaces 5j and 6j are adjusted so as to be substantially the same position in the radial direction of the flanges 10A and 10B. Both flange portions 10A and 10B are so-called GF flanges.

〔別実施形態〕
（Ａ）上記実施形態では、第１挟持部材５の内嵌合部５Ａを有底筒状に構成し内部に筒状内部空間５ｃを形成して、内嵌合部５Ａの底部に雌ネジ部５ｄを開口形成するとともに、第２挟持部材６の外嵌合部６Ａを有底筒状に構成し内部に筒状内部空間６ｃを形成して、外嵌合部６Ａの底部に挿通孔６ｄを形成することで、締結手段７を、当該挿通孔６ｄに挿通され且つ雌ネジ部５ｄに螺合される締結ボルト７Ａと当該雌ネジ部５ｄとにより構成したが、第１挟持部材５、第２挟持部材６及び締結手段７の構成は、適宜変更することができる。 [Another embodiment]
(A) In the above embodiment, the inner fitting portion 5A of the first clamping member 5 is formed in a bottomed cylindrical shape, and the cylindrical inner space 5c is formed inside, and a female screw portion is formed at the bottom of the inner fitting portion 5A. 5d is formed as an opening, and the outer fitting portion 6A of the second clamping member 6 is formed in a bottomed cylindrical shape to form a cylindrical inner space 6c. An insertion hole 6d is formed in the bottom of the outer fitting portion 6A. By forming the fastening means 7, the fastening bolt 7A inserted through the insertion hole 6d and screwed into the female screw portion 5d and the female screw portion 5d are used. The structure of the clamping member 6 and the fastening means 7 can be changed suitably.

例えば、図１１に示すように、第１挟持部材５０の内嵌合部５０Ａを第２挟持部材５１の外嵌合部５１Ａに内嵌可能な外径を備えた概略角棒状に構成し、第２挟持部材５１の外嵌合部５１Ａを筒状に構成する。なお、第１挟持部材５０は、上記実施形態における鍔状部５Ｂ及び進退部材５Ｃ（図１１では、長孔５ｉを設けていない）を備え、第２挟持部材５１は、上記実施形態における進退部材６Ｂを備える。そして、内嵌合部５０Ａの先端側には、雄ネジ部５２ａを備えたボルト５２がフランジ接合方向（内嵌合部５０Ａの長手方向）に突出形成され、外嵌合部５１Ａ内に内嵌合部５０Ａが相対回転不能に嵌合した状態で、雄ネジ部５２ａの先端が外嵌合部５１Ａの外側に突出し、当該突出部分に締結ナット５３が外嵌合部５１Ａの外方から外面側に当接するまで螺合され、第１挟持部材５０及び第２挟持部材５１が締付固定される構成としてもよい。   For example, as shown in FIG. 11, the inner fitting portion 50A of the first holding member 50 is configured in a substantially square bar shape having an outer diameter that can be fitted into the outer fitting portion 51A of the second holding member 51, and 2 The outer fitting part 51A of the clamping member 51 is formed in a cylindrical shape. In addition, the 1st clamping member 50 is provided with the bowl-shaped part 5B and the advance / retreat member 5C (In FIG. 11, the long hole 5i is not provided) in the said embodiment, and the 2nd clamping member 51 is the advance / retreat member in the said embodiment. 6B. A bolt 52 having a male threaded portion 52a is formed on the distal end side of the inner fitting portion 50A so as to protrude in the flange joining direction (longitudinal direction of the inner fitting portion 50A), and is fitted inside the outer fitting portion 51A. With the joint portion 50A fitted in a relatively non-rotatable manner, the front end of the male screw portion 52a protrudes to the outside of the outer fitting portion 51A, and the fastening nut 53 extends from the outside of the outer fitting portion 51A to the outer surface side. The first clamping member 50 and the second clamping member 51 may be fastened and fixed until they come into contact with each other.

また、例えば、図１２に示すように、第１挟持部材６０の内嵌合部６０Ａを筒状に構成して、当該内嵌合部６０Ａを相対回転不能な状態で第２挟持部材６１の外嵌合部６１Ａに内嵌可能な外径を備え且つ締結ボルト６２の雄ネジ部（図示せず）を挿通可能な筒状内部空間６３を形成可能な内径を備えた構成とする。すなわち、内嵌合部６０Ａには、雌ネジ部を形成しない。なお、第１挟持部材６０は、上記実施形態における鍔状部５Ｂ及び進退部材５Ｃを備え、第２挟持部材６１は、上記実施形態における進退部材６Ｂを備える。そして、締結手段７が、内嵌合部６０Ａと外嵌合部６１Ａとの筒状内部空間６３、６ｃに対して一方の外側から貫通状態で挿入される締結ボルト６２と、締結ボルト６２の突出雄ネジ部６２ａに他方の外側から螺合する締結ナット６４とを備える。そして、外嵌合部６１Ａ内に内嵌合部６０Ａが嵌合した状態で、突出雄ネジ部６２ａが外嵌合部６１Ａの外側に突出し、当該突出雄ネジ部６２ａに締結ナット６４が外嵌合部６１Ａの外方から外面側に当接するまで螺合され、第１挟持部材６０及び第２挟持部材６１が締付固定される構成としてもよい。
これにより、内嵌合部６０Ａ及び外嵌合部６１Ａを筒状に形成するだけで、両者にネジ山を形成する必要がないため、フランジ接合部補強治具Ｐを簡便且つ安価な構成とすることができる。 In addition, for example, as shown in FIG. 12, the inner fitting portion 60A of the first clamping member 60 is formed in a cylindrical shape, and the inner fitting portion 60A is outside the second clamping member 61 in a state in which the inner fitting portion 60A is not relatively rotatable. The fitting portion 61 </ b> A has an outer diameter that can be fitted into the fitting portion 61 </ b> A, and an inner diameter that can form a cylindrical inner space 63 into which a male screw portion (not shown) of the fastening bolt 62 can be inserted. That is, an internal thread portion is not formed in the inner fitting portion 60A. In addition, the 1st clamping member 60 is provided with the bowl-shaped part 5B and the advancing / retreating member 5C in the said embodiment, and the 2nd clamping member 61 is provided with the advancing / retreating member 6B in the said embodiment. Then, the fastening means 7 includes a fastening bolt 62 that is inserted through the cylindrical inner spaces 63 and 6c of the inner fitting portion 60A and the outer fitting portion 61A from one outer side, and a protrusion of the fastening bolt 62. A fastening nut 64 that is screwed into the male screw portion 62a from the other outer side is provided. Then, in a state where the inner fitting portion 60A is fitted in the outer fitting portion 61A, the protruding male screw portion 62a protrudes to the outside of the outer fitting portion 61A, and the fastening nut 64 is fitted on the protruding male screw portion 62a. The first clamping member 60 and the second clamping member 61 may be tightened and fixed by being screwed until they come into contact with the outer surface side from the outside of the joining portion 61A.
Accordingly, the inner fitting portion 60A and the outer fitting portion 61A are simply formed in a cylindrical shape, and it is not necessary to form a thread on both of them, so that the flange joint reinforcing jig P is configured to be simple and inexpensive. be able to.

また、例えば、図１３に示すように、第１挟持部材７０は、上記実施形態における内嵌合部５Ａ及び鍔状部５Ｂを備え、第２挟持部材７１は、上記実施形態における外嵌合部６Ａを備えるが、鍔状部５Ｂには保持孔５ｅを形成せず、外嵌合部６Ａの底部には保持孔６ｅを形成しないように構成する。
第１挟持部材７０の鍔状部５Ｂには、当該鍔状部５Ｂの四辺（四平面）のうちの一辺（一平面）からさらに外方側に延出する押圧部７０Ａが一体的に形成されている。押圧部７０Ａは、側面視で若干先窄み形状に形成され、縦断面視で先端側に行くにつれて雌ネジ部５ｄ側に傾斜するテーパー形状に形成され、押圧部７０Ａのうち雌ネジ部５ｄ側の面の先端部位が、内嵌合部５Ａの外面５ａと垂直な押圧面７０ａとして形成されている。
第２挟持部材７１の外嵌合部６Ａには、外嵌合部６Ａの一端部において当該外嵌合部６Ａの外面６ａの四辺（四平面）のうちの一辺（一平面）からさらに外方側に延出する押圧部７１Ａが一体的に形成されている。押圧部７１Ａは、側面視で若干先窄み形状に形成され、縦断面視で先端側に行くにつれて押圧部７１Ａが形成された側とは反対側に傾斜するテーパー形状に形成され、押圧部７１Ａのうち挿通孔６ｄとは反対側の面の先端部位が、外嵌合部６Ａの外面６ａと垂直な押圧面７１ａとして形成されている。
そして、両挟持部材７０、７１の各押圧部７０Ａ、７１Ａが両押圧部７０Ａ、７１Ａの延出方向（両フランジ部１Ａ、１Ｂの径方向）で相互に偏倚した位置となるように構成され、各押圧部７０Ａ、７１Ａの各押圧面７０ａ、７１ａが両フランジ部１Ａ、１Ｂの外側面１ａ、１ａの夫々に当て付けられた状態で、両挾持部材７０、７１が締結ボルト７Ａと雌ネジ部５ｄとの螺合により締付固定操作可能に構成されている。
これにより、両挟持部材７０、７１の押圧部７０Ａ、７１Ａを、両フランジ部１Ａ、１Ｂの径方向において、径方向外方側の位置で当て付けられる外方側押圧部（押圧部７１Ａの押圧面７１ａ）と、外方側押圧部よりも径方向内方側の位置で当て付けられる内方側押圧部（押圧部７０Ａの押圧面７０ａ）とから構成することが可能となる。
従って、一方のフランジ部１Ａに接続された空気弁Ｖの外径が当該フランジ部１Ａに接続される水道管１の外径よりも大径で、しかも、空気弁Ｖと当該フランジ部１Ａとが水道管１の管軸方向において近接する場合であっても、フランジ部１Ａの径方向外方側に適宜引退した構成である第２挟持部材７１の押圧部７１Ａ（外方側押圧部）が空気弁Ｖに干渉しない状態で、両挟持部材７０、７１を両フランジ部１Ａ、１Ｂに装着することができる。また、空気弁Ｖが接続されていない他方のフランジ部１Ｂにおいては、フランジ部１Ｂの径方向内方側に適宜進入した構成である第１挟持部材７０の押圧部７０Ａ（内方側押圧部）が所期の位置でフランジ部１Ｂの外側面１ａに当て付けられる状態で、両挟持部材７０、７１を両フランジ部１Ａ、１Ｂに装着することができる。なお、第１挟持部材７０における押圧部７０Ａの押圧面７０ａがフランジ部１Ｂの外側面に当て付けられる所期の位置は、両フランジ部１Ａ、１Ｂ間に介装されるガスケット２に対応する部位に位置させることが好ましい。 For example, as shown in FIG. 13, the first clamping member 70 includes the inner fitting portion 5 </ b> A and the flange-like portion 5 </ b> B in the above embodiment, and the second clamping member 71 is the outer fitting portion in the above embodiment. 6A is provided, but the holding hole 5e is not formed in the bowl-shaped part 5B, and the holding hole 6e is not formed in the bottom of the outer fitting part 6A.
A pressing portion 70A that extends further outward from one side (one plane) of the four sides (four planes) of the bowl-shaped portion 5B is integrally formed on the bowl-shaped portion 5B of the first clamping member 70. ing. The pressing portion 70A is formed in a slightly tapered shape in a side view, and is formed in a tapered shape that inclines toward the female screw portion 5d as it goes to the tip side in a longitudinal sectional view, and the female screw portion 5d side of the pressing portion 70A. The tip portion of this surface is formed as a pressing surface 70a perpendicular to the outer surface 5a of the inner fitting portion 5A.
The outer fitting portion 6A of the second clamping member 71 is further outward from one side (one plane) of the four sides (four planes) of the outer surface 6a of the outer fitting portion 6A at one end of the outer fitting portion 6A. A pressing portion 71A extending to the side is integrally formed. The pressing portion 71A is formed in a slightly tapered shape in a side view, and is formed in a tapered shape that is inclined to the opposite side to the side on which the pressing portion 71A is formed in the longitudinal sectional view. Of these, the tip portion of the surface opposite to the insertion hole 6d is formed as a pressing surface 71a perpendicular to the outer surface 6a of the outer fitting portion 6A.
And each press part 70A, 71A of both clamping members 70 and 71 is constituted so that it may become a position mutually deviated in the extending direction (diameter direction of both flange parts 1A and 1B) of both press parts 70A and 71A, With the pressing surfaces 70a and 71a of the pressing portions 70A and 71A being applied to the outer surfaces 1a and 1a of the flange portions 1A and 1B, the holding members 70 and 71 are connected to the fastening bolt 7A and the female screw portion. Tightening and fixing operation is possible by screwing with 5d.
As a result, the pressing portions 70A and 71A of the both clamping members 70 and 71 are applied to the outer pressing portions (the pressing of the pressing portion 71A in the radial direction of both flange portions 1A and 1B) at positions radially outward. It becomes possible to comprise the surface 71a) and the inner side pressing portion (the pressing surface 70a of the pressing portion 70A) applied at a position radially inward of the outer side pressing portion.
Accordingly, the outer diameter of the air valve V connected to one flange portion 1A is larger than the outer diameter of the water pipe 1 connected to the flange portion 1A, and the air valve V and the flange portion 1A are Even when the water pipe 1 is close in the tube axis direction, the pressing portion 71A (outward side pressing portion) of the second clamping member 71 having a configuration appropriately retracted radially outward of the flange portion 1A is air. Both clamping members 70 and 71 can be attached to both flange portions 1A and 1B without interfering with the valve V. Further, in the other flange portion 1B to which the air valve V is not connected, the pressing portion 70A (inward side pressing portion) of the first clamping member 70 having a configuration appropriately entering the radially inner side of the flange portion 1B. Can be attached to both flange portions 1A and 1B in a state where the pin is applied to the outer surface 1a of the flange portion 1B at the expected position. The intended position where the pressing surface 70a of the pressing portion 70A of the first clamping member 70 is applied to the outer surface of the flange portion 1B is a portion corresponding to the gasket 2 interposed between the flange portions 1A and 1B. It is preferable to be located at.

（Ｂ）上記実施形態では、両フランジ部１Ａ、１Ｂにフランジ接合部補強治具Ｐを装着する際、第１挟持部材５の内嵌合部５Ａと第２挟持部材６の外嵌合部６Ａとをある程度嵌合させ、締結ボルト７Ａと雌ネジ部５ｄとの螺合により内嵌合部５Ａ及び外嵌合部６Ａを仮固定してから、内嵌合部５Ａと進退部材５Ｃと外嵌合部６Ａと進退部材６Ｂとにより形成される凹部Ｃを両フランジ部１Ａ、１Ｂに外嵌装着する構成としたが、フランジ接合部補強治具Ｐの装着手順は適宜変更することができる。
例えば、第２挟持部材６の外嵌合部６Ａの保持孔６ｅに進退部材６Ｂの進退部６ｆを挿通した状態で、進退部材６Ｂにおける押圧部６ｇの押圧面６ｊをフランジ部１Ａの外側面１ａに当接させ、外嵌合部６Ａをフランジ部１Ａの外周面１ｃの径方向外方側に位置させて、さらに、第１挟持部材５の鍔状部５Ｂの保持孔５ｅに進退部材５Ｃの進退部５ｆを挿通した状態で、第１挟持部材５の内嵌合部５Ａをフランジ接合方向から上記外嵌合部６Ａ内に嵌合させつつ、進退部材５Ｃにおける押圧部５ｇの押圧面５ｊをフランジ部１Ｂの外側面１ａに当接させる。その後、締結ボルト７Ａの雄ネジ部７ａを外嵌合部６Ａの挿通孔６ｄを介して内嵌合部５Ａの雌ネジ部５ｄに螺合させ、進退部材５Ｃ及び進退部材６Ｂを適宜両フランジ部１Ａ、１Ｂの径方向に適宜進退させつつ、第１挟持部材５及び第２挟持部材６を両フランジ部１Ａ、１Ｂに外嵌装着することもできる。この際、両フランジ部１Ａ、１Ｂに接続されている流体機器がある場合には、各押圧部５ｇ、６ｇを両フランジ部１Ａ、１Ｂの径方向外方側に適宜引退させて流体機器と各押圧部５ｇ、６ｇとの接触を防止するとともに、流体機器が接続されていない場合でも、各押圧部５ｇ、６ｇを両フランジ部１Ａ、１Ｂの径方向内方側に適宜進入させて両フランジ部１Ａ、１Ｂ間に存在するガスケット２等の密封部材に対応する位置を確実に押圧する構成とすることができる。 (B) In the above embodiment, when the flange joint reinforcing jig P is attached to both flange portions 1A and 1B, the inner fitting portion 5A of the first clamping member 5 and the outer fitting portion 6A of the second clamping member 6 are used. And the inner fitting portion 5A and the outer fitting portion 6A are temporarily fixed by screwing between the fastening bolt 7A and the female screw portion 5d, and then the inner fitting portion 5A and the advance / retreat member 5C are fitted to the outer fitting portion. Although the concave portion C formed by the joining portion 6A and the advancing / retracting member 6B is externally fitted to both flange portions 1A, 1B, the mounting procedure of the flange joint reinforcing jig P can be changed as appropriate.
For example, in a state where the advance / retreat portion 6f of the advance / retreat member 6B is inserted into the holding hole 6e of the outer fitting portion 6A of the second holding member 6, the press surface 6j of the press portion 6g of the advance / retreat member 6B is connected to the outer side surface 1a of the flange portion 1A. The outer fitting portion 6A is positioned on the radially outer side of the outer peripheral surface 1c of the flange portion 1A, and the advancing / retreating member 5C is inserted into the holding hole 5e of the flange portion 5B of the first clamping member 5. With the inner fitting portion 5A of the first clamping member 5 fitted into the outer fitting portion 6A from the flange joining direction while the advance / retreat portion 5f is inserted, the pressing surface 5j of the pressing portion 5g of the advance / retreat member 5C is It is made to contact | abut to the outer surface 1a of the flange part 1B. Thereafter, the male screw portion 7a of the fastening bolt 7A is screwed into the female screw portion 5d of the inner fitting portion 5A through the insertion hole 6d of the outer fitting portion 6A, and the advance / retreat member 5C and the advance / retreat member 6B are appropriately fitted to both flange portions. The first clamping member 5 and the second clamping member 6 can be externally fitted to both flange portions 1A and 1B while being appropriately advanced and retracted in the radial direction of 1A and 1B. At this time, if there is a fluid device connected to both the flange portions 1A and 1B, the pressing portions 5g and 6g are appropriately retracted radially outward of the both flange portions 1A and 1B, respectively. While preventing contact with the pressing parts 5g and 6g, even when the fluid device is not connected, the pressing parts 5g and 6g are appropriately entered into the radially inward sides of both flange parts 1A and 1B to form both flange parts. It can be set as the structure which presses reliably the position corresponding to sealing members, such as the gasket 2 which exists between 1A and 1B.

（Ｃ）上記実施形態では、両挟持部材５、６の押圧部５ｇ、６ｇの両方を両フランジ部１Ａ、１Ｂの径方向に進退自在に構成したが、いずれか一方の押圧部のみを当該径方向に進退自在に構成してもよい。
また、押圧部５ｇ、６ｇを進退手段により両フランジ部１Ａ、１Ｂの径方向に進退自在に構成する際には、上記実施形態のように、押圧部５ｇを進退部材５Ｃに一体形成し、押圧部６ｇを進退部材６Ｂに一体形成する構成に限らず、当該径方向において押圧部５ｇを第１挟持部材５の内嵌合部５Ａに対して進退可能或いは押圧部６ｇを第２挟持部材６の外嵌合部６Ａに対して進退可能な構成であれば、適宜採用することができ、例えば、進退部材５Ｃ、６Ｂを省略し、押圧部５ｇを第１挟持部材５に対して当該径方向に進退自在に構成することもでき、押圧部６ｇを第２挟持部材６に対して径方向に進退自在に構成することもできる。
さらに、例えば、進退部材５Ｃ、６Ｂを保持孔５ｅ、６ｅに挿通して、進退部材５Ｃ、６Ｂを保持孔５ｅ、６ｅに沿って保持案内された状態で進退（摺動）させて、押圧部５ｇ、６ｇを両フランジ部１Ａ、１Ｂの径方向に進退させる構成（進退手段）ではなく、押圧部５ｇ、６ｇをネジ機構等（進退手段）により当該径方向に進退させる構成としてもよい。 (C) In the above embodiment, both the pressing portions 5g and 6g of the sandwiching members 5 and 6 are configured to advance and retreat in the radial direction of both flange portions 1A and 1B, but only one of the pressing portions has the diameter. You may comprise so that it can advance / retreat to a direction freely.
Further, when the pressing portions 5g and 6g are configured to advance and retract in the radial direction of the flange portions 1A and 1B by the advancing / retreating means, the pressing portion 5g is formed integrally with the advancing / retreating member 5C as in the above embodiment. The configuration is not limited to the configuration in which the portion 6 g is integrally formed with the advance / retreat member 6 </ b> B, and the pressing portion 5 g can be advanced and retracted with respect to the inner fitting portion 5 </ b> A of the first holding member 5 in the radial direction. Any configuration that can advance and retreat with respect to the outer fitting portion 6A can be employed as appropriate. For example, the advancement and retraction members 5C and 6B are omitted, and the pressing portion 5g is arranged in the radial direction with respect to the first clamping member 5. The pressing part 6g can also be configured to be movable back and forth in the radial direction with respect to the second clamping member 6.
Further, for example, the advancing / retracting members 5C, 6B are inserted into the holding holes 5e, 6e, and the advancing / retreating members 5C, 6B are moved forward and backward (slid) in a state of being held and guided along the holding holes 5e, 6e. Instead of a configuration (advance / retreat means) in which 5g and 6g are advanced and retracted in the radial direction of both flange portions 1A and 1B, a configuration in which the pressing portions 5g and 6g are advanced and retracted in the radial direction by a screw mechanism or the like (advance / retreat means).

（Ｄ）上記実施形態では、第１挟持部材５の押圧部５ｇ及び第２挟持部材６の押圧部６ｇが両フランジ部１Ａ、１Ｂの径方向に進退可能な範囲を長孔５ｉ、６ｉにより最大引退位置と最大進入位置との間の所定範囲Ｌとなるように規制したが、両押圧部５ｇ、６ｇの各所定範囲Ｌは各別に適宜設定することができる。また、長孔５ｉ、６ｉの形状は、当該所定範囲Ｌを設定することができる形状であれば適宜変更することができる。 (D) In the above embodiment, the long holes 5i and 6i maximize the range in which the pressing portion 5g of the first clamping member 5 and the pressing portion 6g of the second clamping member 6 can advance and retract in the radial direction of both flange portions 1A and 1B. Although the predetermined range L between the retraction position and the maximum approach position is regulated, the predetermined ranges L of the pressing portions 5g and 6g can be appropriately set separately. Further, the shape of the long holes 5i, 6i can be appropriately changed as long as the predetermined range L can be set.

（Ｅ）上記実施形態では、第１挟持部材５に内嵌合部５Ａを設け、第２挟持部材６に外嵌合部６Ａを設けるように構成したが、第１挟持部材５に外嵌合部を設け、第２挟持部材６に内嵌合部を設ける構成としてもよい。 (E) In the above embodiment, the first holding member 5 is provided with the inner fitting portion 5A, and the second holding member 6 is provided with the outer fitting portion 6A. It is good also as a structure which provides a part and provides an internal fitting part in the 2nd clamping member 6. FIG.

（Ｆ）上記実施形態では、第１挟持部材５の内嵌合部５Ａと第２挟持部材６の外嵌合部６Ａとの嵌合形状、すなわち、横断面視で、内嵌合部５Ａの外面５ａ及び外嵌合部６Ａの内面６ｂの形状を、概略正方形状としたが、内嵌合部５Ａと外嵌合部６Ａとが嵌合された状態でフランジ接合方向周りでの相対回転が不能に構成されていれば、その他の嵌合形状を採用することもできる。例えば、横断面視で、内嵌合部５Ａの外面５ａ及び外嵌合部６Ａの内面６ｂの形状を、楕円形状、多角形状等に構成することができる。 (F) In the above embodiment, the fitting shape of the inner fitting portion 5A of the first holding member 5 and the outer fitting portion 6A of the second holding member 6, that is, the cross-sectional view of the inner fitting portion 5A. Although the shape of the outer surface 5a and the inner surface 6b of the outer fitting portion 6A is a substantially square shape, relative rotation around the flange joining direction is performed with the inner fitting portion 5A and the outer fitting portion 6A being fitted. Other fitting shapes can also be employed as long as they are not possible. For example, the shape of the outer surface 5a of the inner fitting portion 5A and the inner surface 6b of the outer fitting portion 6A can be configured in an elliptical shape, a polygonal shape, or the like in a cross-sectional view.

（Ｇ）上記実施形態では、第１挟持部材５の内嵌合部５Ａを有底筒状に構成し内部に筒状内部空間５ｃを形成して、当該筒状内部空間５ｃにおいて、鍔状部５Ｂが形成された側を開口形成したが、当該開口形成された部位をゴム等により構成される栓部材により閉塞する構成とすることもできる。これにより、筒状内部空間５ｃ内に塵埃等が侵入することを良好に防止できるとともに、外観の向上も図ることができる。 (G) In the above-described embodiment, the inner fitting portion 5A of the first clamping member 5 is formed in a bottomed cylindrical shape, and the cylindrical inner space 5c is formed therein. In the cylindrical inner space 5c, the bowl-shaped portion Although the opening on the side where 5B is formed is formed, it is also possible to adopt a configuration in which the portion where the opening is formed is closed by a plug member made of rubber or the like. Thereby, it is possible to satisfactorily prevent dust and the like from entering the cylindrical internal space 5c and to improve the appearance.

（Ｈ）上記実施形態では、両フランジ部１Ａ、１Ｂを８対の連結ボルト４Ａ及び連結ナット４Ｂにより連結する構成としたが、フランジ部１Ａ、１Ｂの呼び径や設計圧力等に応じて、連結ボルト４Ａ及び連結ナット４Ｂの数は適宜調整することができる。 (H) In the above embodiment, the two flange portions 1A and 1B are connected by the eight pairs of connecting bolts 4A and the connecting nut 4B. However, depending on the nominal diameter of the flange portions 1A and 1B, the design pressure, etc. The number of bolts 4A and connecting nuts 4B can be adjusted as appropriate.

（Ｉ）上記実施形態では、流体機器として空気弁Ｖを例にして説明したが、補修弁、消火栓、短管その他の流体機器であってもよい。 (I) Although the air valve V has been described as an example of the fluid device in the above embodiment, a repair valve, a fire hydrant, a short pipe, or other fluid devices may be used.

（Ｊ）上記実施形態では、流体配管系（管路）を構成する流体管の一例である鋳鉄製の両水道管１、１に形成した両フランジ部１Ａ、１Ｂにフランジ接合部補強治具Ｐを装着する例について説明したが、流体管としては気体や液体が通流する管であってもよい。 (J) In the above embodiment, the flange joint reinforcing jig P is connected to both flange portions 1A and 1B formed on both cast water pipes 1 and 1 which are examples of fluid pipes constituting a fluid piping system (pipe). However, the fluid pipe may be a pipe through which gas or liquid flows.

なお、上記実施形態（別実施形態を含む、以下同じ）で開示される構成は、矛盾が生じない限り、他の実施形態で開示される構成と組み合わせて適用することが可能であり、また、本明細書において開示された実施形態は例示であって、本発明の実施形態はこれに限定されず、本発明の目的を逸脱しない範囲内で適宜改変することが可能である。   Note that the configurations disclosed in the above-described embodiments (including other embodiments, the same applies hereinafter) can be applied in combination with the configurations disclosed in the other embodiments as long as no contradiction arises. The embodiment disclosed in this specification is an exemplification, and the embodiment of the present invention is not limited to this. The embodiment can be appropriately modified without departing from the object of the present invention.

以上説明したように、両フランジ部を含む管路を所定の耐震性能を備えた耐震管路に補強しつつ、両フランジ部の離間やずれを簡便且つ安価に防止できるフランジ接合部補強治具を提供することができる。   As described above, a flange joint reinforcement jig that can easily and inexpensively prevent separation and displacement of both flange portions while reinforcing a pipeline including both flange portions to an earthquake resistant pipeline having predetermined earthquake resistance performance. Can be provided.

１ 水道管（流体管）
１Ａ フランジ部
１Ｂ フランジ部
１ａ 外側面
１ｃ 外周面
２ ガスケット（密封部材）
３ 貫通孔
５ 第１挟持部材（挟持部材）
５Ａ 内嵌合部
５Ｃ 進退部材（進退手段）
５ｃ 筒状内部空間
５ｄ 雌ネジ部（締結手段）
５ｅ 保持孔（進退手段）
５ｇ 押圧部
５ｈ 突出部（最大引退位置規制部）
５ｉ 長孔（最大進入位置規制部、最大引退位置規制部）
６ 第２挟持部材（挟持部材）
６Ａ 外嵌合部
６Ｂ 進退部材（進退手段）
６ａ 外面（装着規制部）
６ｃ 筒状内部空間
６ｅ 保持孔
６ｇ 押圧部
６ｈ 突出部（最大引退位置規制部）
６ｉ 長孔（最大進入位置規制部、最大引退位置規制部）
７ 締結手段
７Ａ 締結ボルト（締結手段）
１０Ａ フランジ部
１０Ｂ フランジ部
１０Ｃ ガスケット（密封部材）
６２ 締結ボルト（締結手段）
６２ａ 突出雄ネジ部
６４ 締結ナット（締結手段）
Ｐ フランジ接合部補強治具
Ｃ 凹部
Ｖ 空気弁（流体機器） 1 Water pipe (fluid pipe)
1A Flange part 1B Flange part 1a Outer side surface 1c Outer peripheral surface 2 Gasket (sealing member)
3 Through-hole 5 1st clamping member (clamping member)
5A Internal fitting part 5C Advance / Retreat member (advance / retreat means)
5c Cylindrical internal space 5d Female thread (fastening means)
5e Holding hole (advance / retreat means)
5g Pressing part 5h Protruding part (maximum retraction position restricting part)
5i long hole (maximum entry position restriction part, maximum retraction position restriction part)
6 Second clamping member (clamping member)
6A Outer fitting part 6B Advancement / retraction member (advance / retreat means)
6a Outer surface (Mounting restriction part)
6c Cylindrical internal space 6e Holding hole 6g Pressing part 6h Protruding part (maximum retraction position restricting part)
6i long hole (maximum entry position restriction part, maximum retraction position restriction part)
7 Fastening means 7A Fastening bolt (fastening means)
10A Flange 10B Flange 10C Gasket (sealing member)
62 Fastening bolt (fastening means)
62a Projecting male screw part 64 Fastening nut (fastening means)
P Flange joint reinforcement jig C Recess V Air valve (fluid device)

Claims (5)

ボルト連結されている両フランジ部の外側面に各別に当接可能な押圧部を備えた一対の挟持部材と、この両挾持部材の押圧部を両フランジ部の外側面に当て付けた状態で当該両挾持部材をフランジ接合方向に引き寄せて締付固定する締結手段とを備えたフランジ接合部補強治具であって、
前記両挾持部材のフランジ接合方向で相対向する部位に、前記両フランジ部の外周面よりも径方向外方側位置においてフランジ接合方向から嵌合する内嵌合部と外嵌合部とが形成され、
少なくとも一方の挟持部材の押圧部を、前記内嵌合部又は前記外嵌合部に対して前記両フランジ部の径方向に進退自在な進退手段を備えたフランジ接合部補強治具。 A pair of clamping members each having a pressing part that can be brought into contact with the outer side surfaces of both flange parts connected to the bolts, and the pressing parts of the both holding members applied to the outer side surfaces of both flange parts. A flange joint reinforcement jig comprising fastening means for pulling both clamping members in the flange joining direction and fastening them together,
An inner fitting portion and an outer fitting portion that are fitted from the flange joining direction at a radially outer side position than the outer peripheral surface of the both flange portions are formed at portions facing each other in the flange joining direction of the both holding members. And
A flange joint reinforcing jig provided with an advancing / retracting means capable of advancing and retracting the pressing portion of at least one clamping member in the radial direction of both flange portions with respect to the inner fitting portion or the outer fitting portion. 前記進退手段が前記両フランジ部の径方向に進退自在な状態で前記内嵌合部又は前記外嵌合部に設けられる進退部材を備え、少なくとも一方の挟持部材の押圧部が前記進退部材に設けられている請求項１に記載のフランジ接合部補強治具。   The advancing / retracting means includes an advancing / retreating member provided in the inner fitting portion or the outer fitting portion in a state of being able to advance / retreat in the radial direction of the both flange portions, and a pressing portion of at least one clamping member is provided in the advancing / retreating member. The flange joint part reinforcement jig of Claim 1 currently provided. 前記進退手段が前記内嵌合部又は前記外嵌合部において前記両フランジ部の径方向に開口形成される保持孔を備え、前記進退部材が前記保持孔に挿通されて前記両フランジ部の径方向に進退自在に構成され、
前記内嵌合部と前記外嵌合部とが夫々筒状又は略筒状に構成され、前記締結手段の締結ボルトが、フランジ接合方向で前記進退部材に開口形成される貫通孔に挿通された状態で、前記内嵌合部と前記外嵌合部との筒状内部空間内に挿通されている請求項２に記載のフランジ接合部補強治具。 The advancing / retracting means includes a holding hole formed in the inner fitting portion or the outer fitting portion so as to open in the radial direction of the two flange portions, and the advancing / retreating member is inserted into the holding hole so that the diameters of the two flange portions are It is configured to move forward and backward in the direction,
The inner fitting portion and the outer fitting portion are each configured in a cylindrical shape or a substantially cylindrical shape, and a fastening bolt of the fastening means is inserted into a through-hole formed in the advance / retreat member in a flange joining direction. The flange joint reinforcing jig according to claim 2, wherein the jig is inserted into a cylindrical inner space between the inner fitting portion and the outer fitting portion in a state. 前記進退手段が、前記両フランジ部の径方向内方側への前記進退部材の進入を最大進入位置に規制する最大進入位置規制部と、前記両フランジ部の径方向外方側への前記進退部材の引退を最大引退位置に規制する最大引退位置規制部とを備えた請求項２又は３に記載のフランジ接合部補強治具。   The advancing / retreating means includes a maximum entry position restricting portion that restricts the entry of the advance / retreat member to the radially inward side of both flange portions at a maximum entry position, and the advance / retreat of the both flange portions toward the radially outward side. The flange joint part reinforcement jig of Claim 2 or 3 provided with the maximum retraction position control part which controls retraction of a member to the maximum retraction position. 前記進退手段が前記内嵌合部又は前記外嵌合部において前記両フランジ部の径方向に開口形成される保持孔を備え、前記進退部材が前記保持孔に挿通されて前記両フランジ部の径方向に進退自在に構成され、
前記内嵌合部と前記外嵌合部とが夫々筒状又は略筒状に構成され、前記締結手段の締結ボルトが、フランジ接合方向で前記進退部材に開口形成される貫通孔に挿通された状態で、前記内嵌合部と前記外嵌合部との筒状内部空間内に挿通され、
前記貫通孔が、前記両フランジ部の径方向に沿った長孔に形成され、
少なくとも前記最大進入位置規制部及び前記最大引退位置規制部の一方が前記長孔により構成されている請求項４に記載のフランジ接合部補強治具。 The advancing / retracting means includes a holding hole formed in the inner fitting portion or the outer fitting portion so as to open in the radial direction of the two flange portions, and the advancing / retreating member is inserted into the holding hole so that the diameters of the two flange portions are It is configured to move forward and backward in the direction,
The inner fitting portion and the outer fitting portion are each configured in a cylindrical shape or a substantially cylindrical shape, and a fastening bolt of the fastening means is inserted into a through-hole formed in the advance / retreat member in a flange joining direction. In a state, it is inserted into a cylindrical inner space between the inner fitting portion and the outer fitting portion,
The through hole is formed in a long hole along the radial direction of the two flange portions,
5. The flange joint reinforcing jig according to claim 4, wherein at least one of the maximum entry position restriction portion and the maximum retraction position restriction portion is configured by the long hole.
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