JP6246145B2

JP6246145B2 - Manhole joint structure, manhole and construction method

Info

Publication number: JP6246145B2
Application number: JP2015028326A
Authority: JP
Inventors: 孝太郎石田; 照正大澤
Original assignee: Haneda Zenith Co Ltd
Current assignee: Haneda Zenith Co Ltd
Priority date: 2014-12-11
Filing date: 2015-02-17
Publication date: 2017-12-13
Anticipated expiration: 2035-02-17
Also published as: JP2016113882A

Description

本発明は、筒体を重ね合わせるマンホールの継手構造及びマンホールとその施工方法に関する。 The present invention relates to a joint structure for manholes that overlap cylinders, a manhole, and a construction method therefor.

従来、この種の継手構造として、筒体の継手部分に伸縮性の可とう継手装置を設置し、筒体の変位を吸収するものが知られている（例えば特許文献１の図１２）。 Conventionally, as this type of joint structure, an elastic flexible joint device is installed in a joint portion of a cylindrical body to absorb the displacement of the cylindrical body (for example, FIG. 12 of Patent Document 1).

そして、例えばマンホールを地震時に破壊しないようにするには、マンホールを上下方向に剛結合するより、筒体間の継手に遊びを持たせた柔構造とするのが好ましい。 For example, in order not to destroy the manhole at the time of an earthquake, it is preferable to have a flexible structure in which play is provided in the joint between the cylinders rather than rigidly connecting the manhole vertically.

一方、筒体間の継手は漏水の発生箇所となる可能性があり、なるべく継手箇所が少ない方がよい。しかし、継手を少なくすると筒体間の目開き量が大きくなり、継手に弾性のあるシール部材を使用して止水性と可とう性とを確保するには、対応可能な目開き量に限度がある。 On the other hand, there is a possibility that the joint between the cylinders may be a location where water leakage occurs, and it is preferable that the joint location is as small as possible. However, if the number of joints is reduced, the amount of openings between the cylinders increases, and there is a limit to the amount of openings that can be accommodated in order to ensure waterproofness and flexibility by using elastic seal members for the joints. is there.

また、目開き量はマンホールの外径が大きくなると同じ屈曲角度でも大きくなるため、大口径のマンホールになるほど、継手に高い可とう性が求められる。 Further, since the amount of openings increases at the same bending angle as the outer diameter of the manhole increases, the joint becomes more flexible as the diameter of the manhole increases.

図１４〜図１５は、特許文献１の図１２に対応した概略説明図である。同図に示すように、上下の筒体101，101の重ね合せ箇所に跨って伸縮性の可とう継手装置102が設けられており、地震などにより上下の筒体が相対的に傾くと、図１４に示すように重ね合せ箇所に目開きが発生し、可とう継手装置102に外側から地下水圧が加わることにより内側に屈曲し、地震が終了すると、図１５に示すように、可とう継手装置102の屈曲部分102Ａが重ね合せ箇所に挟まれ、これにより可とう継手装置102の止水性能の低下を招くという問題がある。 14 to 15 are schematic explanatory views corresponding to FIG. As shown in the figure, an elastic flexible joint device 102 is provided across the overlapping positions of the upper and lower cylinders 101, 101, and when the upper and lower cylinders are relatively inclined due to an earthquake or the like, As shown in FIG. 15, when the opening is generated in the overlapped portion as shown in FIG. 14, the inside of the flexible joint device 102 is bent inward by applying groundwater pressure from the outside, and the earthquake ends, the flexible joint device is shown in FIG. 15. There is a problem in that the bent portion 102A of 102 is sandwiched between the overlapping portions, thereby causing a decrease in the water stop performance of the flexible joint device 102.

特開２００７−５６４６２号公報JP 2007-56462 A

解決しようとする課題は、弾性筒状体が重ね合せ箇所に挟まれることを防止し、止水性を確保することができるマンホールの継手構造及びマンホールとその施工方法を提供することを目的とする。 An object of the present invention is to provide a manhole joint structure, a manhole, and a construction method thereof that can prevent the elastic cylindrical body from being sandwiched between overlapping portions and ensure water-stopping properties.

請求項１の発明は、上下に重ねた筒体の重ね合せ箇所の上下に跨って上下方向に伸縮可能な弾性筒状体を設けるマンホールの継手構造において、前記弾性筒状体の前記重ね合せ箇所への侵入を防止する侵入防止部材を、前記重ね合せ箇所の上下に跨って前記上下の筒体の外周に配置し、前記侵入防止部材の外周に前記弾性筒状体を配置すると共に、前記弾性筒状体の上，下取付部を前記上下の筒体に取り付け、前記侵入防止部材は周方向に分割されており、前記上，下取付部に対応して前記上下の筒体の外周に取付部用溝部が形成され、前記上下の取付部用溝部に前記上，下取付部を配置し、前記上，下取付部に締付バンドを外装し、前記締付バンドにより前記上，下取付部を締め付けて前記上下の取付部用溝部に取り付けたことを特徴とする。 The invention according to claim 1 is a manhole joint structure in which an elastic cylindrical body that can be expanded and contracted in the vertical direction is provided across the upper and lower positions of the overlapping portions of the cylindrical bodies that are vertically stacked. An intrusion prevention member for preventing intrusion into the outer periphery of the upper and lower cylinders across the top and bottom of the overlapped portion, and the elastic cylindrical body is arranged on the outer periphery of the intrusion prevention member, and the elasticity The upper and lower mounting portions of the cylindrical body are attached to the upper and lower cylindrical bodies, and the intrusion prevention member is divided in the circumferential direction, and is attached to the outer periphery of the upper and lower cylindrical bodies corresponding to the upper and lower mounting portions. Groove portions are formed, the upper and lower mounting portions are disposed in the upper and lower mounting portion groove portions, a fastening band is externally mounted on the upper and lower mounting portions, and the upper and lower mounting portions are formed by the tightening bands. be characterized in that attached to the groove for the upper and lower mounting portion by tightening the .

請求項１の構成によれば、地震力などが作用した場合、筒体の重ね合せ箇所が開くことで地震時などの力を吸収し、筒体にひび割れ等が生じない。また、筒体の重ね合せ箇所が開くと、弾性筒状体が上下方向に伸び、この状態でも弾性筒状体には地下水圧が加わるが、侵入防止部材により弾性筒状体が開いた重ね合せ箇所に挟まれることがなく、地震終了後は前の状態に戻ることができる。 According to the structure of Claim 1, when an earthquake force etc. act, the force of the time of an earthquake etc. is absorbed by opening the overlapping location of a cylinder, and a crack etc. do not arise in a cylinder. Overlaid also open the superposition portion of the tubular body, extending resilient cylindrical body in the vertical direction, but groundwater pressure is applied also to the elastic tubular body in this state, the elastic cylindrical body by intrusion prevention member is opened It can be returned to the previous state after the earthquake ends without being caught between the matching points.

また、分割されているため、筒体への配置を容易に行うことができる。 Also, because it is split, it is possible to perform the arrangement of the cylindrical body easily.

また、取付部用溝部を基準にして上，下取付部の取付を容易に行うことができる。また、取付部用溝部に上，下取付部が嵌ることにより安定した取付状態が得られる。さらに、筒体の外周より凹んだ取付部用溝部に、上，下取付部を嵌めることにより、筒体の外周に上，下取付部を装着する場合に比べて、上，下取付部における周方向の伸びによるストレスを抑制することができる。 Also, on to the groove portion with part taken as a reference, it is possible to easily mount the lower mounting portion. Further, a stable mounting state can be obtained by fitting the upper and lower mounting portions into the mounting portion groove portions. Furthermore, by fitting the upper and lower mounting parts into the groove for the mounting part that is recessed from the outer periphery of the cylinder, the upper and lower mounting parts are more Stress due to direction elongation can be suppressed .

また、請求項２の発明は、前記侵入防止部材の上方及び下方で前記上下の筒体の外周と前記弾性筒状体の内周との間に止水用の上，下弾性リング部材を配置したことを特徴とする。 Further, the invention according to claim 2 is provided with upper and lower elastic ring members for water stop between the outer periphery of the upper and lower cylinders and the inner periphery of the elastic cylindrical body above and below the intrusion prevention member. It is characterized by that .

また、請求項２の構成によれば、地下水圧が加わると、弾性筒状体は筒体及び上，下弾性リング部材に押し付けられ、上，下弾性リング部材は圧縮され止水効果を発揮する。 According to the configuration of claim 2, when underground water pressure is applied, the elastic cylindrical body is pressed against the cylindrical body and the upper and lower elastic ring members, and the upper and lower elastic ring members are compressed to exhibit a water stop effect. .

また、請求項３の発明は、前記上下の筒体の外周に、前記上，下弾性リング部材を配置するリング部材用溝部を形成したことを特徴とする。 According to a third aspect of the present invention, a ring member groove for arranging the upper and lower elastic ring members is formed on the outer periphery of the upper and lower cylinders.

また、請求項３の構成によれば、上，下弾性リング部材の位置決めを容易に行うことができる。 Further, according to the configuration of the third aspect , the upper and lower elastic ring members can be easily positioned.

また、請求項４の発明は、前記侵入防止部材の上下方向中央側には、前記重ね合せ箇所に係合する係合部を設けたことを特徴とする。 The invention according to claim 4 is characterized in that an engagement portion that engages with the overlapping portion is provided on the center side in the vertical direction of the intrusion prevention member.

また、請求項４の構成によれば、係合部を重ね合せ箇所に係合することにより、侵入防止部材の上下方向の位置決めを行うことができる。 According to the fourth aspect of the present invention, the intrusion preventing member can be positioned in the vertical direction by engaging the engaging portion with the overlapping portion.

また、請求項５の発明は、複数の前記筒体を上下方向に重ね合わせると共に、前記上下の筒体に前記継手構造を設けたことを特徴とする。 The invention according to claim 5 is characterized in that a plurality of the cylinders are overlapped in the vertical direction, and the joint structure is provided in the upper and lower cylinders.

請求項５の構成によれば、複数の筒体を上下に重ね合わせてマンホールを構築し、このマンホールは、地震時などにより筒体の重ね合せ箇所に目開きが発生しても、弾性筒状体が重ね合せ箇所に挟まれることを防止でき、弾性筒状体による止水性を確保することができる。 According to the configuration of claim 5 , a manhole is constructed by superimposing a plurality of cylinders on top and bottom, and the manhole has an elastic cylindrical shape even if an opening occurs at the overlapping part of the cylinders due to an earthquake or the like. It is possible to prevent the body from being sandwiched between overlapping portions, and to ensure water-stopping by the elastic cylindrical body.

また、請求項６の発明は、前記筒体が周方向に分割された複数の分割筒体からなり、前記複数の分割筒体を周方向に接続したことを特徴とする。 The invention according to claim 6 is characterized in that the cylindrical body includes a plurality of divided cylindrical bodies divided in the circumferential direction, and the plurality of divided cylindrical bodies are connected in the circumferential direction.

請求項６の構成によれば、止水性に優れた大径のマンホールが得られる。 According to the structure of Claim 6 , the large-diameter manhole excellent in water-stopping property is obtained.

また、請求項７の発明は、前記侵入防止部材の上方及び下方で前記上下の筒体の外周に止水用の上，下弾性リング部材を配置した後、前記侵入防止部材の外周に前記弾性筒状体を配置すると共に、前記弾性筒状体の上，下取付部を前記上下の筒体に取り付け、前記弾性筒状体の内周に止水用の前記上，下弾性リング部材を当接することを特徴とする。 According to a seventh aspect of the present invention, after the upper and lower elastic ring members for water stop are arranged on the outer periphery of the upper and lower cylinders above and below the intrusion preventing member, the elastic member is disposed on the outer periphery of the intrusion preventing member. The cylindrical body is arranged, the upper and lower mounting portions of the elastic cylindrical body are attached to the upper and lower cylindrical bodies, and the upper and lower elastic ring members for water stop are applied to the inner periphery of the elastic cylindrical body. It is characterized by touching.

また、請求項７の構成によれば、請求項７に記載のマンホールが得られる。 Further, according to the configuration of claim 7, manhole le according to claim 7 is obtained.

上記構成によれば、地震時などにより筒体の重ね合せ箇所に目開きが発生しても、弾性筒状体が重ね合せ箇所に挟まれることを防止でき、弾性筒状体による止水性を確保することができる。 According to the above configuration, even if an opening occurs at the overlapping part of the cylindrical body due to an earthquake or the like, it is possible to prevent the elastic cylindrical body from being caught between the overlapping parts, and to ensure water-stopping by the elastic cylindrical body. can do.

本発明の実施例１を示す継手構造の断面図である。It is sectional drawing of the joint structure which shows Example 1 of this invention. 同上、要部の拡大断面図である。It is an expanded sectional view of the principal part same as the above. 同上、侵入防止部材の斜視図である。It is a perspective view of an intrusion prevention member same as the above. 同上、弾性筒状体を図示省略した断面図である。It is sectional drawing which abbreviate | omitted illustration of the elastic cylinder body same as the above. 同上、係合部周りの拡大断面図である。It is an expanded sectional view around an engaging part same as the above. 同上、取付部の断面図である。It is sectional drawing of an attachment part same as the above. 同上、マンホールの要部の斜視図である。It is a perspective view of the principal part of a manhole same as the above. 同上、筒体の平面図である。It is a top view of a cylinder same as the above. 同上、重ね合せ箇所が開いた状態の断面図である。FIG. 3 is a cross-sectional view showing a state where the overlapping portion is opened. 同上、取付部用溝部のない止水構造の断面図である。It is sectional drawing of the water stop structure without a groove part for attachment parts same as the above. 本発明の実施例２を示す止水構造の断面図である。It is sectional drawing of the water stop structure which shows Example 2 of this invention. 本発明の実施例３を示す止水構造の断面図である。It is sectional drawing of the water stop structure which shows Example 3 of this invention. 本発明の実施例４を示すマンホールの要部の斜視図である。It is a perspective view of the principal part of the manhole which shows Example 4 of this invention. 従来例を示す重ね合せ部分が開いた状態の断面図である。It is sectional drawing in the state where the overlapping part which shows a prior art example was opened. 同上、重ね合せ部分が開いた後に閉まった状態の断面図である。FIG. 3 is a cross-sectional view of a state where the overlapping portion is closed after being opened.

本発明における好適な実施の形態について、添付図面を参照して説明する。尚、以下に説明する実施例は、特許請求の範囲に記載された本発明の内容を限定するものではない。また、以下に説明される構成の全てが、本発明の必須要件であるとは限らない。 Preferred embodiments of the present invention will be described with reference to the accompanying drawings. In addition, the Example demonstrated below does not limit the content of this invention described in the claim. In addition, all of the configurations described below are not necessarily essential requirements of the present invention.

図１〜図９は実施例１を示しており、マンホール１は、円筒形の筒体２，２・・・を組み立てる組立式マンホールであり、前記筒体２はプレキャストコンクリートなどからなる。尚、前記筒体２の直径（内径）は２０００〜３５００ｍｍ程度である。また、マンホール１は地中に埋設され、土圧を受ける。尚、この例では、筒体２は周方向に一体のものを用いている。 1 to 9 show a first embodiment. A manhole 1 is an assembly type manhole for assembling cylindrical cylindrical bodies 2, 2,..., And the cylindrical body 2 is made of precast concrete or the like. In addition, the diameter (inner diameter) of the said cylinder 2 is about 2000-3500 mm. The manhole 1 is buried in the ground and subjected to earth pressure. In this example, the cylindrical body 2 is integrated in the circumferential direction.

上下の筒体２，２が重ね合わされ、上下の筒体２，２の下端面３と上端面４との間に５ｍｍ程度の目地部５を設け、この目地部５には充填材６などが充填される。尚、前記目地部５が重ね合せ箇所である。また、この例では、下端面３と上端面４は平坦面に形成されている。 The upper and lower cylinders 2 and 2 are overlapped, and a joint portion 5 of about 5 mm is provided between the lower end surface 3 and the upper end surface 4 of the upper and lower cylinders 2 and 2. Filled. The joint portion 5 is an overlapping portion. In this example, the lower end surface 3 and the upper end surface 4 are formed as flat surfaces.

継手構造として以下の構成を備える。前記上下の筒体２，２の外周には前記目地部５の上下を跨ぐように、侵入防止部材11が設けられている。この侵入防止部材11は、鉄板やステンレス鋼板などからなり、高さが一定なリング体を分割した複数の円弧状分割体12，12・・・からなり、図３では円周方向等間隔で５分割したものを例示している。尚、前記リング体の分割数は分割体12を人力で取り扱える重量を基準にして決めるので、筒体２が大きくなれば増加する。 The following structure is provided as a joint structure. An intrusion prevention member 11 is provided on the outer periphery of the upper and lower cylindrical bodies 2, 2 so as to straddle the upper and lower sides of the joint portion 5. The intrusion prevention member 11 is made of an iron plate, a stainless steel plate, or the like, and is composed of a plurality of arc-shaped divided bodies 12, 12,... Obtained by dividing a ring body having a constant height, and in FIG. The divided parts are illustrated. The number of divisions of the ring body is determined on the basis of the weight with which the division body 12 can be handled by human power, and therefore increases as the cylindrical body 2 becomes larger.

前記侵入防止部材11は、厚さが０．５〜２ｍｍ程度で、前記高さＨが７０〜１５０ｍｍ程度である。前記高さＨは、予想される地震などにより目地部５が開く量の２倍以上とし、これにより地震時などでも目地部５を覆うことができる。また、直径（内径）が２０００〜３５００ｍｍ程度で、地震などにより目地部５が開く量は略３０ｍｍと予想されるから、上記の寸法とした。前記侵入防止部材11は上下の筒体２のずれによるせん断等に対抗する構造材ではなく、後述する弾性筒状体21の目地部５への侵入を防止するものであるから、上記の厚さとした。 The intrusion prevention member 11 has a thickness of about 0.5 to 2 mm and a height H of about 70 to 150 mm. The height H is set to be twice or more the opening amount of the joint portion 5 due to an expected earthquake or the like, so that the joint portion 5 can be covered even during an earthquake. In addition, since the diameter (inner diameter) is about 2000 to 3500 mm and the amount of opening of the joint portion 5 due to an earthquake or the like is expected to be about 30 mm, the above dimensions are used. The intrusion prevention member 11 is not a structural material that resists shearing or the like due to the displacement of the upper and lower cylinders 2 but prevents the elastic cylindrical body 21 to be described later from entering the joint 5. did.

前記円弧状分割体12はゴム系接着剤により前記上下の筒体２，２の目地部５に跨って貼り付けられる。この場合、周方向に隣り合う円弧状分割体12，12・・・の周方向端縁12Ｆ，12Ｆ同士を合わせるように貼り付けることが好ましいが、必ずしも端縁12Ｆ，12Ｆ同士を密着させる必要はなく、端縁12Ｆ，12Ｆ間に多少の隙間があっても弾性筒状体21が目地部５に侵入しなければよい。 The arcuate segment 12 is pasted over the joint 5 of the upper and lower cylinders 2 and 2 with a rubber adhesive. In this case, it is preferable that the circumferential edges 12F, 12F of the arcuate segments 12, 12,... Adjacent to each other in the circumferential direction are pasted together, but the edges 12F, 12F need not be in close contact with each other. Even if there is a slight gap between the end edges 12F and 12F, the elastic cylindrical body 21 does not have to enter the joint portion 5.

また、円弧状分割体12を筒体２の外周に貼り付ける際は、円弧状分割体12の高さ方向中央が目地部５に位置するようにする。この場合、全ての前記円弧状分割体12，12・・・の内周には、図５に示すように、その高さ方向中央に係合部13を設け、この係合部13が前記目地部５に係入する。前記係合部13はＴ形リブや突起などからなり、前記円弧状分割体12の内周に溶着して設けられる。また、図４に示したように、下端面３と上端面４の外周側の面取り部３Ｍ，４Ｍの間に前記係合部13を挿入するようにしてもよい。尚、１つの円弧状分割体12の内周に、周方向に間隔を置いて複数の係合部13を設けてもよい。このように目地部５に係合部13を係合することにより、貼り付け時の作業が容易となり、また、目地部５に対する円弧状分割体12の高さ位置の偏りを防止することができる。 Further, when the arcuate divided body 12 is attached to the outer periphery of the cylindrical body 2, the center of the arcuate divided body 12 in the height direction is positioned at the joint portion 5. In this case, as shown in FIG. 5, an engaging portion 13 is provided at the center in the height direction on the inner periphery of all the arc-shaped divided bodies 12, 12,. Enroll in part 5. The engaging portion 13 is formed of a T-shaped rib, a protrusion, or the like, and is welded to the inner periphery of the arcuate divided body 12. Further, as shown in FIG. 4, the engaging portion 13 may be inserted between the chamfered portions 3M and 4M on the outer peripheral side of the lower end surface 3 and the upper end surface 4. A plurality of engaging portions 13 may be provided on the inner circumference of one arcuate divided body 12 at intervals in the circumferential direction. By engaging the engaging portion 13 with the joint portion 5 in this manner, the work at the time of attachment becomes easy, and the deviation of the height position of the arcuate divided body 12 with respect to the joint portion 5 can be prevented. .

また、前記上下の筒体２，２の外周には、止水のために上，下弾性リング部材14Ａ，14Ｂが配置され、これら上，下弾性リング部材14Ａ，14Ｂは環状の丸ゴムなどからなる。このため、上下の筒体２，２の外周には、上，下リング部材用溝部15Ａ，15Ｂが周設されている。この例では、断面円形の弾性リング部材14Ａ，14Ｂに対応して、略半円形のリング部材用溝部15Ａ，15Ｂが形成されている。これらリング部材用溝部15Ａ，15Ｂの深さは弾性リング部材14Ａ，14Ｂの直径の１／２〜１／３程度が好ましい。また、リング部材用溝部15Ａ，15Ｂに嵌めることにより接着を不要とすることができる。 Further, upper and lower elastic ring members 14A and 14B are disposed on the outer circumferences of the upper and lower cylinders 2 and 2 for water stoppage. The upper and lower elastic ring members 14A and 14B are made of an annular round rubber or the like. Become. Therefore, upper and lower ring member grooves 15A and 15B are provided around the outer periphery of the upper and lower cylinders 2 and 2. In this example, substantially semicircular ring member grooves 15A and 15B are formed corresponding to the elastic ring members 14A and 14B having a circular cross section. The depth of the ring member grooves 15A and 15B is preferably about 1/2 to 1/3 of the diameter of the elastic ring members 14A and 14B. Further, the bonding can be made unnecessary by fitting in the ring member grooves 15A and 15B.

また、図２に示すように、上側のリング部材用溝部15Ａは、前記侵入防止部材11の上端より上方に設けられ、下側のリング部材用溝部15Ｂは、前記侵入防止部材11の下端より下方に設けられ、上端と上側のリング部材用溝部15Ａのリング部材14Ａとの間隔Ｈ１と、下端と下側のリング部材用溝部15Ｂのリング部材14Ｂとの間隔Ｈ１とは、１０ｍｍ以上が望ましく、前記間隔Ｈ１を１５〜２０ｍｍ程度としている。即ち、弾性リング部材14Ａ，14Ｂの位置は、弾性リング部材14Ａ，14Ｂの外側に侵入防止部材11が乗り上げるか、または弾性リング部材14Ａ，14Ｂが侵入防止部材11の外周に乗り上げると止水性がなくなるので、侵入防止部材11から離れた位置にしており、上述したように間隔Ｈ１を１０ｍｍ以上とした。尚、施工性は劣るが、溝部15Ａ，15Ｂを設けないようにすることもでき、この場合は筒体２の外周に接着することが好ましい。 As shown in FIG. 2, the upper ring member groove 15A is provided above the upper end of the intrusion prevention member 11, and the lower ring member groove 15B is lower than the lower end of the intrusion prevention member 11. The distance H1 between the upper end and the ring member 14A of the upper ring member groove portion 15A and the distance H1 between the lower end and the ring member 14B of the lower ring member groove portion 15B are preferably 10 mm or more, The interval H1 is about 15 to 20 mm. In other words, the elastic ring members 14A and 14B are positioned such that when the intrusion prevention member 11 rides on the outside of the elastic ring members 14A and 14B, or the elastic ring members 14A and 14B ride on the outer periphery of the intrusion prevention member 11, the water stoppage is lost. Therefore, the position is away from the intrusion prevention member 11, and the interval H1 is set to 10 mm or more as described above. In addition, although workability is inferior, it is also possible not to provide the groove portions 15A and 15B. In this case, it is preferable to adhere to the outer periphery of the cylindrical body 2.

また、前記弾性リング部材14Ａ，14Ｂは、硬い方が丸ゴムの効果が発揮できるので、ＪＩＳＫ６２５３に準拠したタイプＡデュロメータを用いた硬度（ＪＩＳＡ硬さ）で、５０〜７０度、６０度程度が好ましい。 The elastic ring members 14A and 14B can exhibit the effect of round rubber when they are hard. Therefore, the hardness (JIS A hardness) using a type A durometer according to JIS K 6253 is 50 to 70 degrees, 60 degrees. A degree is preferred.

ゴムなどの弾性体からなる前記弾性筒状体21は、円筒形の筒本体22と、この筒本体22の上下に一体に設けられた上，下取付部23Ａ，23Ｂとを一体に備え、上，下取付部23Ａ，23Ｂは前記筒本体22より肉厚に形成されている。前記弾性筒状体21の高さＨ２は、侵入防止部材11の高さと上，下取付部23Ａ，23Ｂの高さから決まるが、侵入防止部材11の高さに２００ｍｍ程度加えた高さが好ましい。尚、前記弾性筒状体21は上下対称である。尚、弾性筒状体21は、筒本体22と上，下取付部23Ａ，23Ｂとを同じ肉厚にすることもできる。 The elastic cylindrical body 21 made of an elastic body such as rubber is integrally provided with a cylindrical cylindrical main body 22 and upper and lower mounting portions 23A and 23B integrally provided above and below the cylindrical main body 22. The lower mounting portions 23A and 23B are formed thicker than the cylinder body 22. The height H2 of the elastic cylindrical body 21 is determined by the height of the intrusion prevention member 11 and the heights of the upper and lower mounting portions 23A and 23B, and is preferably a height obtained by adding about 200 mm to the height of the intrusion prevention member 11. . The elastic cylindrical body 21 is vertically symmetric. In addition, the elastic cylindrical body 21 can also make the cylinder main body 22 and upper and lower attachment part 23A, 23B the same thickness.

また、前記筒本体22の内周長は、前記筒体２の外周長と同じか若干短めに形成されている。即ち、筒体２が円筒形状の場合、筒本体22の内径は筒体２の外径と同一か若干小さく形成されている。したがって、実際の装着状態では図２に示すように、筒本体22は筒体２の外周及び侵入防止部材11の外周に接する。また、図６などに示すように、上，下取付部23Ａ，23Ｂは、前記筒本体22に比べて厚く、且つ前記筒本体22の内径と、凹凸部26を除いた上，下取付部23Ａ，23Ｂの内径Ｄが略同一に形成されている。即ち、筒本体22の内面の周長と、凹凸部26を除いた上，下取付部23Ａ，23Ｂの内面の周長が略同一に形成されている。 Further, the inner peripheral length of the cylindrical body 22 is formed to be the same as or slightly shorter than the outer peripheral length of the cylindrical body 2. That is, when the cylinder 2 is cylindrical, the inner diameter of the cylinder main body 22 is the same as or slightly smaller than the outer diameter of the cylinder 2. Therefore, in an actual mounting state, as shown in FIG. 2, the cylinder main body 22 contacts the outer periphery of the cylinder 2 and the outer periphery of the intrusion prevention member 11. Further, as shown in FIG. 6 and the like, the upper and lower mounting portions 23A and 23B are thicker than the cylindrical main body 22, and the upper and lower mounting portions 23A excluding the inner diameter of the cylindrical main body 22 and the uneven portion 26. , 23B are formed to have substantially the same inner diameter D. That is, the circumferential length of the inner surface of the cylinder main body 22 and the circumferential lengths of the inner surfaces of the lower mounting portions 23A and 23B are substantially the same except for the uneven portion 26.

前記上，下取付部23Ａ，23Ｂの外周には、上下にバンド用の凹部24，24を形成し、これら凹部24，24にそれぞれ締付手段たる締付バンド25，25を装着する。図１では、締付バンド25は上，下取付部23Ａ，23Ｂに２本ずつ装着しているが、１本でもよく、３本以上でもよい。また、上，下取付部23Ａ，23Ｂの内周には、断面が略三角形の凹部と凸部が上下に並んだ凹凸部26が形成されている。さらに、前記上下の筒体２，２の外周には、前記上，下取付部23Ａ，23Ｂに対応して、取付部用溝部27，27が周設されており、この取付部用溝部27の底部は筒体２の外周より小径に形成されている。 On the outer periphery of the upper and lower mounting portions 23A, 23B, band recesses 24, 24 are formed on the upper and lower sides, and tightening bands 25, 25 serving as tightening means are mounted on the recesses 24, 24, respectively. In FIG. 1, two tightening bands 25 are attached to the upper and lower attachment portions 23A and 23B, respectively, but may be one or three or more. Further, on the inner periphery of the upper and lower mounting portions 23A and 23B, a concave and convex portion 26 in which a concave portion and a convex portion having a substantially triangular cross section are arranged vertically is formed. Further, on the outer circumferences of the upper and lower cylinders 2 and 2, there are provided mounting portion groove portions 27 and 27 corresponding to the upper and lower mounting portions 23A and 23B. The bottom is formed with a smaller diameter than the outer periphery of the cylinder 2.

そして、上下の取付部用溝部27，27に前記上，下取付部23Ａ，23Ｂを配置し、締付バンド25，25により前記上，下取付部23Ａ，23Ｂを締め付けて筒体２に取付固定する。尚、弾性筒状体21の前記硬度は、４０〜５０程度であり、前記弾性リング部材14Ａ，14Ｂに比べて柔らかい。このように上，下取付部23Ａ，23Ｂが比較的柔らかいため、締付バンド25，25による締付により、凹凸部26が凹んで溝部27の底部との接触面積が大きくなり止水性が向上する。また、取付部用溝部27を設けることにより、溝部27からの上，下取付部23Ａ，23Ｂの抜け出し防止、位置決めの目安、さらに、溝部27を接着剤又は滑材のスペースとして使用することができる。 The upper and lower mounting portions 23A and 23B are arranged in the upper and lower mounting groove portions 27 and 27, and the upper and lower mounting portions 23A and 23B are fastened by the fastening bands 25 and 25 to be fixed to the cylindrical body 2. To do. The elastic cylindrical body 21 has a hardness of about 40 to 50 and is softer than the elastic ring members 14A and 14B. Since the upper and lower mounting portions 23A and 23B are relatively soft in this manner, the concave and convex portions 26 are recessed by the tightening with the tightening bands 25 and 25, and the contact area with the bottom portion of the groove portion 27 is increased, thereby improving the water stoppage. . Further, by providing the mounting portion groove portion 27, the upper and lower mounting portions 23A and 23B can be prevented from coming out of the groove portion 27, a guide for positioning, and the groove portion 27 can be used as a space for the adhesive or the lubricant. .

また、取付部用溝部27を設けることにより上，下取付部23Ａ，23Ｂの取付周長が短くなることにより、取付状態において上，下取付部23Ａ，23Ｂの伸びを緩和することができる。即ち、上述したように弾性筒状体21の内周長は、筒体２の外周長と同一か若干短く形成されているから、筒体２の外周には弾性筒状体21を周方向に伸ばしながら装着する必要があるが、溝部27により上，下取付部23Ａ，23Ｂの伸びが軽減され、加わるストレスが減る。そして、取付部23Ａ，23Ｂと筒本体22の内径は略同一であり、目地部５が開いたときに、筒体２に比べて周長の短い取付部用溝部27の取付部23Ａ，23Ｂに加わる引っ張り力は、他の筒本体22より小さくなり、締め付け力の効果が上がる。 Further, by providing the mounting portion groove 27, the mounting circumferential lengths of the upper and lower mounting portions 23A and 23B are shortened, so that the elongation of the upper and lower mounting portions 23A and 23B can be relaxed in the mounting state. That is, as described above, the inner circumferential length of the elastic cylindrical body 21 is formed to be the same as or slightly shorter than the outer circumferential length of the cylindrical body 2. Although it is necessary to attach while extending, the groove 27 reduces the elongation of the upper and lower mounting portions 23A and 23B, and reduces the applied stress. The inner diameters of the mounting portions 23A and 23B and the cylinder body 22 are substantially the same, and when the joint portion 5 is opened, the mounting portions 23A and 23B of the mounting portion groove portion 27 having a shorter circumference than the cylindrical body 2 are provided. The applied pulling force is smaller than that of the other cylinder body 22, and the effect of the tightening force is increased.

ところで、弾性筒状体21が図１４〜図１５のようにならないようにするためには、筒本体の厚さを厚くすることや、ゴムに繊維を入れて剛性を高めることが考えられるが、いずれも弾性筒状体が重くなって施工が大変になり、また、ゴムに繊維を入れるとゴムの伸びが無くなるので、可とう性も損なわれる。本実施例では、これらの問題を解消することができる。 By the way, in order to prevent the elastic cylindrical body 21 from becoming as shown in FIGS. 14 to 15, it is conceivable to increase the thickness of the cylinder main body or to increase the rigidity by adding fibers to rubber. In either case, the elastic cylindrical body becomes heavy and the construction becomes difficult, and when fibers are put into the rubber, the elasticity of the rubber is lost, so the flexibility is also impaired. In this embodiment, these problems can be solved.

次に、前記継手構造の施工方法について説明する。上，下リング部材用溝部15Ａ，15Ｂに上，下弾性リング部材14Ａ，14Ｂを装着する。また、上，下の筒体２，２のいずれか一方に弾性筒状体21を外装する。この場合、上リング部材用溝部15Ａの上方又は下リング部材用溝部15Ｂの下方に弾性筒状体21を外装しておく。 Next, the construction method of the joint structure will be described. Upper and lower elastic ring members 14A and 14B are mounted in the upper and lower ring member grooves 15A and 15B. Further, an elastic cylindrical body 21 is externally mounted on one of the upper and lower cylindrical bodies 2 and 2. In this case, the elastic cylindrical body 21 is externally provided above the upper ring member groove portion 15A or below the lower ring member groove portion 15B.

この後、上下の筒体２，２を重ね合せ、その目地部５に係合部13を挿入して複数の円弧状分割体12により目地部５を囲み、円弧状分割体12を上，下の筒体２，２の少なくとも一方の外周に接着剤により接着する。尚、この例では、下の筒体２の外周に円弧状分割体12を接着する。このようにして侵入防止部材11を目地部５の上下に跨って取り付けた後、上，下の筒体２，２のいずれか一方に外装していた弾性筒状体21を移動し、上，下の取付部用溝部27，27に上，下取付部23Ａ，23Ｂを嵌める。この場合、外装していた弾性筒状体21を周方向に伸ばした状態で移動する。 Thereafter, the upper and lower cylinders 2 and 2 are overlapped, the engaging portion 13 is inserted into the joint portion 5 and the joint portion 5 is surrounded by the plurality of arc-shaped divided bodies 12, and the arc-shaped divided body 12 is moved up and down. Are adhered to the outer periphery of at least one of the cylinders 2 and 2 by an adhesive. In this example, the arcuate divided body 12 is bonded to the outer periphery of the lower cylindrical body 2. After the intrusion prevention member 11 is mounted across the joint portion 5 in this way, the elastic cylindrical body 21 that is sheathed on either the upper or lower cylindrical body 2 or 2 is moved, and the upper, The upper and lower mounting portions 23A and 23B are fitted into the lower mounting portion groove portions 27 and 27, respectively. In this case, the elastic cylindrical body 21 that has been packaged is moved in a state of being stretched in the circumferential direction.

上，下取付部23Ａ，23Ｂの凹部24，24に締付バンド25，25を外装し、これら締付バンド25，25により上，下取付部23Ａ，23Ｂを締め付けて凹部24，24に固定する。 Fastening bands 25 and 25 are externally mounted on the recesses 24 and 24 of the upper and lower mounting portions 23A and 23B, and the upper and lower mounting portions 23A and 23B are fastened to the recesses 24 and 24 by the tightening bands 25 and 25. .

尚、図１０に示すように、筒体２の外周に取付部用溝部27を設けずに、筒体２の外周に上，下取付部23Ａ，23Ｂを取付固定してもよい。 As shown in FIG. 10, the upper and lower attachment portions 23 </ b> A and 23 </ b> B may be attached and fixed to the outer periphery of the cylinder 2 without providing the attachment portion groove 27 on the outer periphery of the cylinder 2.

次に、前記構成につきその作用を説明する。マンホール１に地震力などが作用した場合、マンホール１が傾き、目地部５が開くことで地震時の力を吸収し、筒体２にひび割れが生じない。そして、図９に示すように、下の筒体２に対して上の筒体２が傾くと、傾いた反対側の目地部５が広がる。上の筒体２が傾くと、侵入防止部材11は上下の筒体２，２に接着されているが、接着剤はゴム糊であり、筒体２の動きを止めるほどの力はないので、目地部５が開き、主として筒本体22が伸びる。この時も外部から地下水圧がマンホール１に作用し続けており、筒本体22は水圧でマンホール１の内側に押されるが、薄板鋼板などからなる侵入防止部材11が開いた目地部５を覆っているため、目地部５に筒本体22が嵌ることがない。このように筒本体22は上下方向のみに伸び、地震終了後は、地震前に戻ることができる。 Next, the effect | action is demonstrated about the said structure. When seismic force or the like is applied to the manhole 1, the manhole 1 is tilted and the joint portion 5 is opened to absorb the force at the time of the earthquake, and the cylinder 2 is not cracked. Then, as shown in FIG. 9, when the upper cylinder 2 is inclined with respect to the lower cylinder 2, the inclined joint portion 5 is widened. When the upper cylinder 2 is tilted, the intrusion prevention member 11 is bonded to the upper and lower cylinders 2 and 2, but the adhesive is rubber glue and there is not enough force to stop the movement of the cylinder 2. The joint portion 5 is opened, and the cylinder body 22 is mainly extended. At this time, the groundwater pressure continues to act on the manhole 1 from the outside, and the cylinder body 22 is pushed inside the manhole 1 by the water pressure. Therefore, the tube main body 22 does not fit into the joint portion 5. In this way, the cylinder body 22 extends only in the vertical direction, and can return to the pre-earthquake after the earthquake.

このように本実施例では、請求項１に対応して、上下に重ねた筒体２，２の重ね合せ箇所たる目地部５の上下に跨って上下方向に伸縮可能な弾性筒状体21を設けるマンホール１の継手構造において、弾性筒状体21の目地部５への侵入を防止する侵入防止部材11を、前記目地部５の上下に跨って上下の筒体２，２の外周に配置し、侵入防止部材11の外周に弾性筒状体21を配置すると共に、弾性筒状体21の上，下取付部23Ａ，23Ｂを上下の筒体２，２に直接取り付けたから、地震力などが作用した場合、筒体２，２の目地部５が開くことで地震時などの力を吸収し、筒体２にひび割れ等が生じない。また、筒体２，２の目地部５が開くと、弾性筒状体21が上下方向に伸び、この状態でも弾性筒状体21には地下水圧が加わるが、侵入防止部材11により弾性筒状体21が開いた目地部５に挟まれることがなく、地震終了後は前の状態に戻ることができる。 Thus, in this embodiment, in accordance with the first aspect, the elastic cylindrical body 21 that can be expanded and contracted in the vertical direction is formed across the joint portion 5 that is the overlapping portion of the cylindrical bodies 2 and 2 that are vertically stacked. In the joint structure of the manhole 1 to be provided, an intrusion prevention member 11 for preventing the elastic cylindrical body 21 from entering the joint portion 5 is arranged on the outer periphery of the upper and lower tubular bodies 2, 2 across the joint portion 5. Since the elastic cylindrical body 21 is disposed on the outer periphery of the intrusion prevention member 11 and the upper and lower mounting portions 23A and 23B are directly mounted on the upper and lower cylindrical bodies 2 and 2, the seismic force is applied. In this case, the joints 5 of the cylinders 2 and 2 are opened to absorb a force during an earthquake and the like, and the cylinder 2 is not cracked. Further, when the joint portion 5 of the cylindrical bodies 2 and 2 is opened, the elastic cylindrical body 21 extends in the vertical direction, and even in this state, groundwater pressure is applied to the elastic cylindrical body 21, but the intrusion prevention member 11 causes an elastic cylindrical shape. The body 21 is not sandwiched between the open joints 5 and can return to the previous state after the earthquake.

また、このように本実施例では、請求項２に対応して、侵入防止部材11の上方及び下方で上下の筒体２，２の外周と弾性筒状体21の内周との間に止水用の上，下弾性リング部材14Ａ，14Ｂを配置したから、地下水圧が加わると、弾性筒状体21は筒体２及び上，下弾性リング部材14Ａ，14Ｂに押し付けられ、上，下弾性リング部材14Ａ，14Ｂは圧縮され止水効果を発揮する。 In this way, in this embodiment, corresponding to claim 2, the upper and lower cylinders 2, 2 above and below the intrusion prevention member 11 are stopped between the outer circumference of the upper and lower cylinders 2, 2 and the inner circumference of the elastic cylinder 21. Since the upper and lower elastic ring members 14A and 14B for water are arranged, when underground water pressure is applied, the elastic cylindrical body 21 is pressed against the cylindrical body 2 and the upper and lower elastic ring members 14A and 14B, and the upper and lower elastic members The ring members 14A and 14B are compressed to exhibit a water stop effect.

また、このように本実施例では、請求項１に対応して、侵入防止部材11は周方向に分割されているから、筒体２への配置を容易に行うことができる。 As described above, in this embodiment, the intrusion prevention member 11 is divided in the circumferential direction corresponding to the first aspect , so that the arrangement on the cylindrical body 2 can be easily performed.

また、このように本実施例では、請求項１に対応して、上，下取付部23Ａ，23Ｂに対応して上下の筒体２，２の外周に取付部用溝部27，27が形成され、上下の取付部用溝部27，27に上，下取付部23Ａ，23Ｂを配置し、上，下取付部23Ａ，23Ｂに締付バンド25を外装し、締付バンド25により上，下取付部23Ａ，23Ｂを締め付けて上下の取付部用溝部27，27に取り付けたから、取付部用溝部27，27を基準にして上，下取付部23Ａ，23Ｂの取付を容易に行うことができる。また、取付部用溝部27，27に上，下取付部23Ａ，23Ｂが嵌ることにより安定した取付状態が得られる。さらに、筒体２の外周より凹んだ取付部用溝部27に、上，下取付部23Ａ，23Ｂを嵌めることにより、筒体２の外周に上，下取付部23Ａ，23Ｂを装着する場合に比べて、上，下取付部23Ａ，23Ｂにおける周方向の伸びによるストレスを抑制することができる。また、締付バンド25，25により上，下取付部23Ａ，23Ｂを締め付けて上下の取付部用溝部27に取り付けることができる。 In this way, in this embodiment, corresponding to claim 1 , mounting portion groove portions 27, 27 are formed on the outer circumferences of the upper and lower cylindrical bodies 2, 2 corresponding to the upper and lower mounting portions 23A, 23B. The upper and lower mounting portions 23A and 23B are arranged in the upper and lower mounting groove portions 27 and 27, the fastening bands 25 are externally mounted on the upper and lower mounting portions 23A and 23B, and the upper and lower mounting portions are mounted by the fastening bands 25. Since 23A and 23B are fastened and attached to the upper and lower attachment groove portions 27 and 27, the upper and lower attachment portions 23A and 23B can be easily attached with reference to the attachment groove portions 27 and 27. Further, when the upper and lower mounting portions 23A and 23B are fitted in the mounting portion groove portions 27 and 27, a stable mounting state can be obtained. Further, by fitting the upper and lower mounting portions 23A and 23B in the mounting portion groove portion 27 recessed from the outer periphery of the cylindrical body 2, compared to the case where the upper and lower mounting portions 23A and 23B are mounted on the outer periphery of the cylindrical body 2. Thus, it is possible to suppress the stress due to the circumferential extension of the upper and lower mounting portions 23A and 23B. Further, the upper and lower attachment portions 23A and 23B can be fastened by the fastening bands 25 and 25 and attached to the upper and lower attachment portion groove portions 27.

また、このように本実施例では、請求項３に対応して、上下の筒体２，２の外周に、上，下弾性リング部材14Ａ，14Ｂを配置するリング部材用溝部15Ａ，15Ｂを形成したから、上，下弾性リング部材14Ａ，14Ｂの位置決めを容易に行うことができる。 In this way, in this embodiment, corresponding to claim 3 , ring member grooves 15A and 15B for arranging the upper and lower elastic ring members 14A and 14B are formed on the outer periphery of the upper and lower cylinders 2 and 2. Therefore, the upper and lower elastic ring members 14A and 14B can be easily positioned.

また、このように本実施例では、請求項４に対応して、侵入防止部材11の上下方向中央側には、重ね合せ箇所たる目地部５に係合する係合部13を設けたから、係合部13を目地部５に係合することにより、侵入防止部材11の上下方向の位置決めを行うことができる。 In this way, in this embodiment, since the intrusion prevention member 11 is provided with the engaging portion 13 that engages with the joint portion 5 which is the overlapping portion, on the center side in the vertical direction of the intrusion preventing member 11 in correspondence with the fourth aspect. By engaging the joint portion 13 with the joint portion 5, the intrusion prevention member 11 can be positioned in the vertical direction.

また、このように本実施例では、請求項５に対応して、複数の筒体２，２・・・を上下方向に重ね合わせると共に、上下の筒体２，２・・・に前記継手構造を設けたから、地震時などにより筒体２，２の重ね合せ箇所に目開きが発生しても、弾性筒状体21が重ね合せ箇所に挟まれることを防止でき、弾性筒状体21による止水性を確保することができる。 Thus, in this embodiment, corresponding to claim 5 , a plurality of cylinders 2, 2... Are stacked in the vertical direction, and the joint structure is formed on the upper and lower cylinders 2, 2. Therefore, even if an opening is generated at the overlapping location of the cylindrical bodies 2 and 2 due to an earthquake, etc., the elastic cylindrical body 21 can be prevented from being caught between the overlapping locations. Aqueous property can be secured.

また、このように本実施例では、上下に重ねた筒体２，２の重ね合せ箇所たる目地部５の上下に跨って上下方向に伸縮可能な弾性筒状体21を設けるマンホール１の継手構造の施工方法において、弾性筒状体21の目地部５への侵入を防止する侵入防止部材11を、目地部５の上下に跨って上下の筒体２，２の外周に配置し、侵入防止部材11の外周に弾性筒状体21を配置するから、請求項１に記載のマンホール１の継手構造が得られる。 Further, in this embodiment Thus, the manhole 1 providing an expandable elastic tubular body 21 in the vertical direction across the top and bottom of the overlapping portion serving joints 5 of the tubular body 2, 2 overlying under joint In the construction method, an intrusion prevention member 11 for preventing the elastic cylindrical body 21 from entering the joint portion 5 is arranged on the outer periphery of the upper and lower tubular bodies 2, 2 across the joint portion 5 to prevent intrusion. Since the elastic cylindrical body 21 is disposed on the outer periphery of the member 11, the joint structure of the manhole 1 according to claim 1 is obtained.

また、このように本実施例では、請求項７に対応して、弾性筒状体21の目地部５への侵入を防止する侵入防止部材11を、目地部５の上下に跨って上下の筒体２，２の外周に配置し、侵入防止部材11の上方及び下方で上下の筒体２，２の外周に止水用の上，下弾性リング部材14Ａ，14Ｂを配置した後、侵入防止部材11の外周に弾性筒状体21を配置すると共に、弾性筒状体21の上，下取付部23Ａ，23Ｂを上下の筒体２，２に取り付け、弾性筒状体21の内周に止水用の上，下弾性リング部材14Ａ，14Ｂを当接するから、請求項２に記載のマンホール１の継手構造が得られる。 In this way, in this embodiment, corresponding to claim 7 , the intrusion prevention member 11 for preventing the intrusion of the elastic cylindrical body 21 into the joint portion 5 is provided on the upper and lower cylinders across the joint portion 5. After disposing the upper and lower elastic ring members 14A and 14B for water stop on the outer periphery of the upper and lower cylindrical bodies 2 and 2 above and below the intrusion prevention member 11 The elastic cylindrical body 21 is disposed on the outer circumference of the elastic cylinder 21, and the upper and lower mounting portions 23A and 23B are attached to the upper and lower cylindrical bodies 2 and 2, and water is stopped on the inner circumference of the elastic cylindrical body 21. Since the upper and lower elastic ring members 14A and 14B are in contact with each other, the joint structure of the manhole 1 according to claim 2 is obtained.

また、実施例上の効果として、１つの円弧状分割体12の内周に、周方向に間隔を置いて複数の係合部13を設ければ、円弧状分割体12を安定して位置決めすることができる。 Further, as an effect of the embodiment, if a plurality of engaging portions 13 are provided on the inner circumference of one arcuate divided body 12 at intervals in the circumferential direction, the arcuate divided body 12 can be stably positioned. be able to.

図１１は本発明の実施例２を示し、上記実施例１と同一部分に同一符号を付し、その説明を省略して詳述すると、この例では、上下の筒体２，２を凹凸嵌合する例であり、上の筒体２の下端面３に嵌合凸部31を形成し、この嵌合凸部31が嵌合する嵌合凹部32を下の筒体２の上端面４に形成している。また、嵌合凸部31の下端と嵌合凹部32の底部との間には、止水用のシール材33を設けている。 FIG. 11 shows a second embodiment of the present invention. The same parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted. The fitting convex part 31 is formed in the lower end surface 3 of the upper cylinder 2, and the fitting concave part 32 which this fitting convex part 31 fits is formed in the upper end surface 4 of the lower cylinder 2. Forming. Further, a sealing material 33 for water stop is provided between the lower end of the fitting convex portion 31 and the bottom portion of the fitting concave portion 32.

このように本実施例でも上記実施例と同様な作用・効果を奏する。また、この例では、凹凸嵌合により上下の筒体２，２の位置合わせが容易となる。 As described above, this embodiment also has the same operations and effects as the above embodiment. In this example, the upper and lower cylindrical bodies 2 and 2 can be easily aligned by the concave and convex fitting.

図１２は本発明の実施例３を示し、上記各実施例と同一部分に同一符号を付し、その説明を省略して詳述すると、この例では、上の筒体２の下端面３の内側に段差状の段差凸部36を設け、この段差凸部36に対応して、下の筒体２の上端面４の内側に段差状の段差凹部37を形成している。また、段差凸部36の下端と段差凹部37の底部との間には、止水用のシール材33を設けている。 FIG. 12 shows a third embodiment of the present invention. The same reference numerals are given to the same parts as those of the above-described embodiments, and the description thereof will be omitted. In this example, the lower end surface 3 of the upper cylindrical body 2 is shown. A step-shaped step convex portion 36 is provided on the inner side, and a step-shaped step concave portion 37 is formed on the inner side of the upper end surface 4 of the lower cylindrical body 2 corresponding to the step convex portion 36. Further, a sealing material 33 for water stop is provided between the lower end of the step protrusion 36 and the bottom of the step recess 37.

このように本実施例でも上記実施例と同様な作用・効果を奏する。また、この例では、インロー嵌合より上下の筒体２，２の位置合わせが容易となる。 As described above, this embodiment also has the same operations and effects as the above embodiment. Further, in this example, the upper and lower cylindrical bodies 2 and 2 can be easily aligned with each other than the spigot fitting.

図１３は本発明の実施例４を示し、上記各実施例と同一部分に同一符号を付し、その説明を省略して詳述すると、この例では、筒体２を周方向に二分割した分割筒体51，51を用い、これら分割筒体51，51の周方向端面52，52を接続して筒体２を構成している。 FIG. 13 shows a fourth embodiment of the present invention. The same reference numerals are given to the same parts as those of the above-described embodiments, and the description thereof will be omitted. In this example, the cylindrical body 2 is divided into two in the circumferential direction. The divided cylinders 51 and 51 are used, and the circumferential end surfaces 52 and 52 of the divided cylinders 51 and 51 are connected to constitute the cylinder 2.

前記周方向端面52，52同士の接続構造としては、接着剤，機械接続，接着剤と機械接続を組み合わせたものが例示される。前記機械接続構造53にはボルト接続やコッター継手金具などが用いられる。尚、周方向端面52，52を剛接続する場合は、筒体２のコンクリート強度よりも強い又は同等の接続強度を持つ手段で剛接続すればよい。 Examples of the connection structure between the circumferential end faces 52 and 52 include an adhesive, a mechanical connection, and a combination of an adhesive and a mechanical connection. For the mechanical connection structure 53, a bolt connection, a cotter fitting, or the like is used. When the circumferential end faces 52, 52 are rigidly connected, they may be rigidly connected by means having a connection strength stronger than or equivalent to the concrete strength of the cylindrical body 2.

また、周方向端面52，52の位置は上下の筒体２，２において平面位置をずらしており、この例では１８０度ずらした位置に配置している。したがって、上下の筒体２，２の周方向端面52，52が上下方向に連続することがない。そして、周方向端面52，52の位置は縦目地箇所となるが、構造的に弱点になりうる縦目地箇所を上下で連続させないことで構造物の強度の安定化を図ることができる。 Further, the positions of the circumferential end faces 52, 52 are shifted in the plane position in the upper and lower cylinders 2, 2, and in this example, they are arranged at positions shifted by 180 degrees. Therefore, the circumferential end surfaces 52 and 52 of the upper and lower cylinders 2 and 2 do not continue in the vertical direction. The positions of the circumferential end faces 52, 52 are vertical joint locations, but the vertical joint locations that can be structurally weak points are not continued vertically, so that the strength of the structure can be stabilized.

このように本実施例でも上記各実施例と同様な作用・効果を奏する。 As described above, this embodiment also has the same operations and effects as the above embodiments.

また、この例では、請求項６に対応して、筒体２が周方向に分割された複数の分割筒体51，51からなり、複数の分割筒体51，51を周方向に接続したから、止水性に優れた大径のマンホール１が得られる。 Also, in this example, corresponding to claim 6 , the cylinder 2 is composed of a plurality of divided cylinders 51, 51 divided in the circumferential direction, and the plurality of divided cylinders 51, 51 are connected in the circumferential direction. A large-diameter manhole 1 excellent in water-stopping property is obtained.

尚、本発明は以上の実施例に限定されるものではなく、発明の要旨の範囲内で種々の変形実施が可能である。例えば、実施例では、筒体が平面円形のマンホールを例に説明したが、筒体は平面角形でもよい。また、実施例では、侵入防止部材をステンレス製としたが、防錆処理を施した鋼製や合成樹脂製でもよい。さらに、実施例では、取付部を２本の締付バンドで取り付けたが、締付バンドは１本でもよいし、３本以上でもよい。また、実施例では、筒体を二分割した例を示したが、三分割以上としてもよい。 In addition, this invention is not limited to the above Example, A various deformation | transformation implementation is possible within the range of the summary of invention. For example, in the embodiment, the case where the cylindrical body is a planar circular manhole has been described as an example, but the cylindrical body may be a planar square. In the embodiment, the intrusion prevention member is made of stainless steel, but may be made of steel or synthetic resin subjected to rust prevention treatment. Furthermore, in the embodiment, the attachment portion is attached with two fastening bands, but the number of fastening bands may be one, or three or more. Moreover, in the Example, although the example which divided the cylinder into two was shown, it is good also as three or more divisions.

１マンホール
２筒体
３下端面
５目地部（重ね合せ箇所）
11 侵入防止部材
12 円弧状分割体
13 係合部
14Ａ上弾性リング部材
14Ｂ下弾性リング部材
15Ａリング部材用溝部
15Ｂリング部材用溝部
21 弾性筒状体
22 筒本体
23Ａ上取付部
23Ｂ下取付部
25 締付バンド（締付手段）
27 取付部用溝部
51 分割筒体 1 Manhole 2 Cylindrical body 3 Lower end surface 5 Joint part (overlapping part)
11 Intrusion prevention member
12 Arc segment
13 Engagement part
14A Upper elastic ring member
14B Lower elastic ring member
15A Ring member groove
15B Ring member groove
21 Elastic cylinder
22 Tube body
23A Upper mounting part
23B Lower mounting part
25 Tightening band (Tightening means)
27 Groove for mounting part
51 split cylinder

Claims

In the manhole joint structure that provides an elastic cylindrical body that can be expanded and contracted in the vertical direction across the top and bottom of the overlapping part of the cylindrical body that is vertically stacked,
An intrusion prevention member that prevents the elastic cylindrical body from entering the overlapping portion is disposed on the outer periphery of the upper and lower cylindrical bodies across the upper and lower portions of the overlapping portion,
The elastic cylindrical body is disposed on the outer periphery of the intrusion prevention member, and the upper and lower mounting portions of the elastic cylindrical body are attached to the upper and lower cylindrical bodies ,
The intrusion prevention member is divided in the circumferential direction,
Corresponding to the upper and lower mounting portions, mounting portion groove portions are formed on the outer periphery of the upper and lower cylinders,
The upper and lower mounting portions are disposed in the upper and lower mounting groove portions, a fastening band is externally mounted on the upper and lower mounting portions, and the upper and lower mounting portions are tightened by the tightening bands. A manhole joint structure characterized by being attached to a groove for a part .

The upper and lower elastic ring members for water stop are arranged between the outer periphery of the upper and lower cylinders and the inner periphery of the elastic cylindrical body above and below the intrusion prevention member. The manhole joint structure described.

3. A manhole joint structure according to claim 2 , wherein a ring member groove for arranging the upper and lower elastic ring members is formed on the outer periphery of the upper and lower cylinders.

The manhole joint structure according to any one of claims 1 to 3 , wherein an engagement portion that engages with the overlapping portion is provided on a central side in the vertical direction of the intrusion prevention member.

Comprising a joint structure of a manhole according to any one of claims 1-4, together with superimposed a plurality of the cylindrical body in the vertical direction, characterized in that a said joint structure to the upper and lower cylindrical body manhole.

6. The manhole according to claim 5 , wherein the cylindrical body includes a plurality of divided cylindrical bodies divided in the circumferential direction, and the plurality of divided cylindrical bodies are connected in the circumferential direction.

After disposing the upper and lower elastic ring members for water stop on the outer periphery of the upper and lower cylinders above and below the intrusion prevention member, the elastic cylinder is disposed on the outer periphery of the intrusion prevention member, and on the resilient cylindrical body, claim attaching the lower mounting portion to said upper and lower cylindrical body, said elastic cylindrical body inner periphery on said for waterproofing of, wherein the abutting a lower elastic ring member 5 The construction method of the described manhole joint structure.