JP2016027267A

JP2016027267A - Fixture

Info

Publication number: JP2016027267A
Application number: JP2014160909A
Authority: JP
Inventors: 亘天野; Wataru Amano; 満浩中島; Mitsuhiro Nakajima; 俊幸興津; Toshiyuki Okitsu; 和行平井; Kazuyuki Hirai; 雅之立田; Masayuki Tatsuta; 卓堀ノ内; Taku Horinouchi; 寛之沼田; Hiroyuki Numata; 山口　竜也; Tatsuya Yamaguchi; 竜也山口
Original assignee: Meidensha Corp; Tokyo Metropolitan Sewerage Service Corp; Meidensha Electric Manufacturing Co Ltd; Hinode Ltd
Current assignee: Meidensha Corp; Tokyo Metropolitan Sewerage Service Corp; Meidensha Electric Manufacturing Co Ltd; Hinode Ltd
Priority date: 2014-06-30
Filing date: 2014-08-07
Publication date: 2016-02-18
Anticipated expiration: 2034-08-07
Also published as: JP6478514B2

Abstract

PROBLEM TO BE SOLVED: To provide a fixture which easily fixes a fixed member such as a connectin cable or a device to an annular surface such as an inner wall of a manhole without needing special attachment construction and the like.SOLUTION: A fixture 16 includes: three split members 19 to 21 joined into a ring shape; an expansion/contraction structure of a joint part R1 between the split members 19, 20; and connection structures which may be bent in inner and outer directions at a joint part R2 between the split members 20, 21 and a joint part R3 between the split members 21, 19. The fixture 16 is attached to an inner wall of a manhole by the joint part R1 being expanded. A connection cable for connecting a measuring instrument to a radio communication control part of the multifunctional manhole is fixed to the fixture 16.SELECTED DRAWING: Figure 2

Description

本発明は、マンホールの内壁などの環状面に接続ケーブルや機器などの被固定部材を固定する際に使用する固定具に関する。 The present invention relates to a fixture used when fixing a member to be fixed such as a connection cable or equipment to an annular surface such as an inner wall of a manhole.

現在、マンホールの蓋に通信端末としての機能を付与し、無線通信回線を介して下水道管渠内に設置された計測器（センサ）の計測情報をセンタ装置に送信する多機能型のマンホール蓋が提案されている。 Currently, a multi-function manhole cover that gives the manhole cover a function as a communication terminal and transmits measurement information of a measuring instrument (sensor) installed in a sewer pipe via a wireless communication line to a center device. Proposed.

この多機能型のマンホール蓋において計測器の測定項目として水位を選択し、該水位センサとして半導体圧力センサを採用した場合、水位センサはディストリビュータ（水位計出力をアイソレーションし、伝送出力が可能）と組み合わせて使用される。このディストリビュータは前記多機能型のマンホール蓋の蓋本体に取り付けられた無線通信制御部に収納され、またディストリビュータと水位センサとは接続ケーブルで接続される。 In this multi-function manhole cover, when the water level is selected as the measurement item of the measuring instrument and a semiconductor pressure sensor is adopted as the water level sensor, the water level sensor is a distributor (isolating the water level meter output and transmitting output is possible) Used in combination. The distributor is housed in a wireless communication control unit attached to the lid body of the multifunction manhole cover, and the distributor and the water level sensor are connected by a connection cable.

このとき水位センサが超音波式水位計などの非接触方式であれば、マンホールの点検などで作業者が昇降するための支障になり難い。一方、水没させて使用する接触方式の場合には、以下のような問題が生じるおそれがある。 At this time, if the water level sensor is a non-contact type such as an ultrasonic water level gauge, it is difficult for the operator to move up and down during inspection of the manhole. On the other hand, in the case of a contact method that is used under water, the following problems may occur.

（１）すなわち、水位センサのみであれば、前記接続ケーブルは１本で済むため、マンホールの内壁に設置された既設の点検用ステップに接続ケーブルを固定しても作業者などの昇降の支障となることは少ない。しかしながら、前記点検用ステップに前記接続ケーブルを固定することは作業者の安全な昇降を必ずしも保障するものではない。 (1) That is, if there is only a water level sensor, only one connection cable is required. Therefore, even if the connection cable is fixed to the existing inspection step installed on the inner wall of the manhole, it may hinder the raising and lowering of the operator. There is little to be. However, fixing the connection cable to the inspection step does not necessarily guarantee the operator's safe lifting.

（２）一方、前記接続ケーブルを点検用ステップに固定しない場合には、マンホ−ル内の空間に接続ケ−ブルが垂下された状態となるため、作業員に接続ケ−ブルが接触することによって昇降動作に支障が生じることが想定される。 (2) On the other hand, when the connection cable is not fixed to the inspection step, the connection cable comes into contact with the worker because the connection cable is suspended in the space in the manhole. It is assumed that the lifting / lowering operation is hindered.

したがって、特に多項目の測定を行う場合、即ち水位センサのみならず他の計測器を備える場合には前記接続ケーブルの振れ止めガイドの設置を余儀なくされやすい。また、前記接続ケーブルを点検用ステップに固定しない場合、降雨時などに急激な水流によって水位センサの水没した検出部が激しく下水道管渠内の壁面に衝突し、損傷を受け故障するおそれもある。 Therefore, especially when measuring many items, that is, when other measuring devices are provided in addition to the water level sensor, it is easy to be forced to install the steadying guide for the connection cable. Further, if the connection cable is not fixed to the inspection step, the submerged detection part of the water level sensor may collide with the wall surface in the sewer pipe due to a rapid water flow when it rains or the like, and there is a risk of failure due to damage.

（３）マンホールの点検時に前記多機能型のマンホール蓋は開閉されるため、前記接続ケーブルが引き出される。このとき前記接続ケーブル先端の計測器（センサ）が引き出されることを防止する観点から、前記多機能型のマンホール蓋の付近に前記接続ケーブルの固定点を設けるとともに、前記接続ケーブルに余裕をもたせて開閉時に前記多機能型のマンホール蓋と固定点との間における張力を緩和することが望まれている。 (3) Since the multi-function manhole cover is opened and closed when the manhole is inspected, the connection cable is pulled out. At this time, from the viewpoint of preventing the measuring instrument (sensor) at the tip of the connection cable from being pulled out, a fixing point of the connection cable is provided in the vicinity of the multifunctional manhole cover, and a margin is provided for the connection cable. It is desired to relieve the tension between the multifunctional manhole cover and the fixed point during opening and closing.

そこで、前記接続ケーブルを作業員の昇降に支障のない位置、即ちマンホールの内壁において既設の点検用ステップとは別の位置に固定することが考えられている。この固定手段としては特許文献１のケーブル固定具が公知となっている。 Therefore, it is considered that the connection cable is fixed at a position where there is no hindrance to raising and lowering the worker, that is, at a position different from the existing inspection step on the inner wall of the manhole. As this fixing means, the cable fixing tool of Patent Document 1 is publicly known.

図９に基づき説明すれば、ケーブル固定具１はマンホールの内壁８の穿孔穴７に一端部が挿入される固定具本体２と、固定具本体２の他端部に一体形成されたフック部３と、固定具本体２内に充填された接着剤４と、固定具本体２の一端部に形成された開口部５と、接着剤４を開口部５から吐出させるセンターピン６とを有している。 Referring to FIG. 9, the cable fixture 1 includes a fixture body 2 having one end inserted into the perforation hole 7 in the inner wall 8 of the manhole, and a hook portion 3 integrally formed with the other end of the fixture body 2. And an adhesive 4 filled in the fixture body 2, an opening 5 formed at one end of the fixture body 2, and a center pin 6 for discharging the adhesive 4 from the opening 5. Yes.

そして、ケーブル固定具１は、固定具本体１の一端部を穿孔穴７に挿入した後にセンターピン６を押し込んで接着剤４を開口部５から吐出させてマンホールの内壁８に取り付けられ、その後にフック部３に接続ケーブルが係止されて固定されている。 The cable fixture 1 is attached to the inner wall 8 of the manhole by inserting the one end of the fixture body 1 into the perforation hole 7 and then pushing the center pin 6 to discharge the adhesive 4 from the opening 5. The connection cable is locked and fixed to the hook portion 3.

特開２００１−３９０９JP2001-3909

ケーブル固定具１による接続ケーブルの固定にあたっては、マンホールの内８に穿孔穴７の工事などが必要となる。しかしながら、穿孔穴７の工事は、マンホールの内壁８の剛性や強度の制約を受け易い。 When the connection cable is fixed by the cable fixing tool 1, the construction of the perforated hole 7 in the manhole 8 is required. However, the construction of the perforated hole 7 is likely to be restricted by the rigidity and strength of the inner wall 8 of the manhole.

特に計測器を増設する場合には穿孔穴７をマンホールの内壁８にさらに追加しなければならず、また計測器の撤去後も穿孔穴７が残ることから、マンホールの内壁８が脆弱化するおそれがある。 In particular, when measuring instruments are added, the perforation hole 7 must be further added to the inner wall 8 of the manhole, and the perforation hole 7 remains even after the instrument is removed, so that the inner wall 8 of the manhole may be weakened. There is.

本発明は、このような問題を解決するためになされ、マンホールの内壁などの環状面に特別な工事を施すことなく、接続ケーブルや機器などの被固定部材を簡単に固定できる固定具の提供を解決課題としている。 The present invention has been made to solve such a problem, and provides a fixture that can easily fix a fixed member such as a connection cable or a device without performing special work on an annular surface such as an inner wall of a manhole. It is a problem to be solved.

本発明の固定具は、リング状に接続される複数の分割部材と、該分割部材同士の接合部の少なくとも１か所を構成する伸縮構造とを備え、前記伸縮構造により前記分割部材同士の距離を伸長させて前記環状面に取り付けられるとともに、前記被固定部材が固定手段により前記分割部材に固定されることを特徴としている。 The fixture of the present invention includes a plurality of divided members connected in a ring shape, and an elastic structure that constitutes at least one portion of a joint portion between the divided members, and the distance between the divided members by the elastic structure. Is attached to the annular surface, and the fixed member is fixed to the divided member by a fixing means.

この固定具の一態様としては、三つ以上の前記分割部材を備え、前記伸縮構造を除く他の前記接合部を内外方向に折り曲げ自在な連結構造により構成することができる。例えば軸部を介して前記分割部材の端部同士を内外方向に回動自在に接続して構成すればよい。 As one mode of this fixture, it is possible to form a connecting structure that includes three or more of the divided members and that can be bent inward and outward, except for the expansion and contraction structure. For example, what is necessary is just to comprise the edge parts of the said division member connected via the axial part so that rotation in the inside and outside direction is possible.

また、前記伸縮構造は、対向する一方の前記分割部材の端部に延設された雄ねじ部材と、他方の前記分割部材の端部に挿通された前記雄ねじ部材に締結される雌ねじ部材とで構成することもできる。 Moreover, the said expansion-contraction structure is comprised with the external thread member extended in the edge part of the one said division member which opposes, and the internal thread member fastened by the said external thread member penetrated by the edge part of the other said division member You can also

この場合は、前記雌ねじ部材の締結位置を調整することで前記分割部材同士の端部間の距離を伸縮させることができる。なお、前記分割部材の外周に弾性体を設けるようにしてもよい。 In this case, the distance between the ends of the divided members can be expanded and contracted by adjusting the fastening position of the female screw member. In addition, you may make it provide an elastic body in the outer periphery of the said division member.

本発明によれば、マンホールの内壁などの環状面に特別な工事を施すことなく、接続ケーブルや機器などの被固定部材を簡単に固定することができる。 ADVANTAGE OF THE INVENTION According to this invention, to-be-fixed members, such as a connection cable and an apparatus, can be easily fixed, without giving special construction to annular surfaces, such as the inner wall of a manhole.

本発明の実施形態に係る固定具の実施例１を示す縦断面図。The longitudinal cross-sectional view which shows Example 1 of the fixing tool which concerns on embodiment of this invention. 同固定具の平面図。The top view of the fixture. 図２のＲ１部分の拡大図。The enlarged view of R1 part of FIG. 図２のＲ２部分（Ｒ３部分）の拡大図。The enlarged view of R2 part (R3 part) of FIG. 同固定具の実施例２を示す縦断面図。The longitudinal cross-sectional view which shows Example 2 of the fixing tool. 同固定具の実施例３を示す縦断面図。The longitudinal cross-sectional view which shows Example 3 of the fixing tool. 同内視図。The same internal view. 図７のＱ１´の部分拡大図。The elements on larger scale of Q1 'of FIG. 特許文献１のケーブル固定具の縦断面図。The longitudinal cross-sectional view of the cable fixing tool of patent document 1. FIG.

以下、本発明の実施形態に係る固定具を説明する。この固定具は、マンホールの内壁などの環状面に接続ケーブルや機器などの被固定部材を固定する際に使用される。ここでは被固定部材をマンホールの内壁に固定する際の実施例を説明する。 Hereinafter, a fixture according to an embodiment of the present invention will be described. This fixing tool is used when fixing a member to be fixed such as a connection cable or equipment to an annular surface such as an inner wall of a manhole. Here, an embodiment when fixing the member to be fixed to the inner wall of the manhole will be described.

≪実施例１≫
図１は固定具が１個の場合の実施例を示し、図１中のＭは下水道管渠Ｐに所定間隔ごとに設置されるマンホールを示している。このマンホールＭは、下水道管渠Ｐに連通する地下のコンクリート構造物からなり、上端開口部が多機能型のマンホール蓋１０に開閉自在に閉塞されている。 Example 1
FIG. 1 shows an embodiment in the case of a single fixture, and M in FIG. 1 shows manholes installed in the sewer pipe P at predetermined intervals. The manhole M is made of an underground concrete structure communicating with the sewer pipe P, and the upper end opening is closed by a multifunctional manhole cover 10 so as to be freely opened and closed.

（１）多機能型のマンホール蓋１０
多機能型のマンホール蓋１０は、前記上端開口部に設置された図示省略の受枠に開閉自在に連結された蓋本体（鉄蓋）１１と、下水道管渠Ｐ内の維持管理に必要なデータを無線通信により送信する無線通信制御部１２と、無線通信制御部１２の通信用のアンテナ１３と、無線通信制御部１２に電源供給する電源部１４とを備え、下水道管渠Ｐ内の維持管理に必要なデータは計測器１５により計測されている。 (1) Multi-function manhole cover 10
The multi-function manhole cover 10 includes a lid main body (iron cover) 11 that is openably and closably connected to a receiving frame (not shown) installed in the upper end opening, and data necessary for maintenance in the sewer pipe P. A wireless communication control unit 12 that transmits by wireless communication, a communication antenna 13 of the wireless communication control unit 12, and a power supply unit 14 that supplies power to the wireless communication control unit 12 are provided for maintenance in the sewer pipe P. Necessary data is measured by the measuring instrument 15.

ここでは計測器１５は、測定項目として背景技術と同様に水位が選択され、水位センサとして半導体圧力センサが採用されているものとする。したがって、計測器としての前記水位センサ１５は図示省略のディストリビュータと組み合わせて使用され、該ディストリビュータは無線通信制御部１２に収納され、前記水位センサ１５は水面下に水没させた状態で計測を行う接触方式とする。 Here, it is assumed that the water level is selected as the measurement item in the measuring instrument 15 as in the background art, and a semiconductor pressure sensor is employed as the water level sensor. Therefore, the water level sensor 15 as a measuring instrument is used in combination with a distributor (not shown), the distributor is stored in the wireless communication control unit 12, and the water level sensor 15 performs measurement in a state where it is submerged under the surface of the water. The method.

このとき前記ディストリビュータと前記水位センサ１５とは接続ケーブル１５ａで接続されている。この接続ケーブル１５ａは、マンホールＭの内壁Ｍ１に固定された固定具１６に固定されている。この固定具１６は、マンホールＭの内壁Ｍ１の周方向に沿って取り付けられている。 At this time, the distributor and the water level sensor 15 are connected by a connection cable 15a. The connection cable 15a is fixed to a fixture 16 fixed to the inner wall M1 of the manhole M. The fixture 16 is attached along the circumferential direction of the inner wall M1 of the manhole M.

（２）固定具１６
固定具１６は、図２に示すように、リング状に接続される三つの分割部材１９〜２１を備えている。この各分割部材１９〜２１は、被固定部材としての接続ケーブル１５ａなどの被固定部材を取り付けた場合に想定される外力（例えば直接・間接的に下方の流水により受ける外力）で破損しない強度および耐食性を有するものとする。この各分割部材１９〜２１の材質としては、例えばステンレス鋼材（ＳＵＳ３０４）などが使用でき、必要な強度および耐食性を満たせば金属以外の材質、例えば繊維強化プラスチック（ＦＲＰ）なども使用できる。 (2) Fixing tool 16
As shown in FIG. 2, the fixture 16 includes three divided members 19 to 21 connected in a ring shape. Each of the divided members 19 to 21 has a strength that is not damaged by an external force (for example, an external force that is directly or indirectly received by flowing water below) assumed when a fixed member such as a connection cable 15a as a fixed member is attached. It shall have corrosion resistance. As the material of each of the divided members 19 to 21, for example, a stainless steel material (SUS304) or the like can be used, and a material other than metal, for example, a fiber reinforced plastic (FRP) or the like can be used as long as necessary strength and corrosion resistance are satisfied.

具体的には各分割部材１９〜２１は、図２〜図４に示すように、横断面コ字状に形成され、底板１９ａ，２０ａ，２１ａに左右の側板１９ｂ，２０ｂ，２１ｂが立設されている。また、各分割部材１９〜２１には、図２に示すように、左右の側板１９ｂ，２０ｂ，２１ｂを連通する一対の連通孔２３が形成され、底板１９ａ，２０ａ，２１ａの長手方向の両端部の外周面に弾性体２４が固着されている。 Specifically, as shown in FIGS. 2 to 4, each of the divided members 19 to 21 is formed in a U-shaped cross section, and left and right side plates 19b, 20b, and 21b are erected on the bottom plates 19a, 20a, and 21a. ing. Moreover, as shown in FIG. 2, each division member 19-21 is formed with a pair of communication holes 23 for communicating the left and right side plates 19b, 20b, 21b, and both end portions in the longitudinal direction of the bottom plates 19a, 20a, 21a. An elastic body 24 is fixed to the outer peripheral surface of the.

この弾性体２４は、耐候性，耐溶剤性，耐酸・耐アルカリ性など必要とされる設置環境に応じて材料選定される。例えばニトリルゴム，水素化ニトリルゴム，フッ素ゴム，シリコーンゴム，エチレンプロピレンゴム，クロロプレンゴム，アクリルゴム，ブチルゴム，ウレタンゴム，天然ゴム，クロロスルフォン化ポリエチレンゴム，エピクロルヒドリングムなどから選択して使用することができる。 The elastic body 24 is selected according to the required installation environment such as weather resistance, solvent resistance, acid resistance and alkali resistance. For example, nitrile rubber, hydrogenated nitrile rubber, fluorine rubber, silicone rubber, ethylene propylene rubber, chloroprene rubber, acrylic rubber, butyl rubber, urethane rubber, natural rubber, chlorosulfonated polyethylene rubber, epichlorohydrin can be used. it can.

また、分割部材１９，２０の接合部Ｒ１は伸縮構造からなる一方、分割部材２０，２１の接合部Ｒ２および分割部材１９，２１の接合部Ｒ３は矢印Ｃ，Ｄ方向に折り曲げ自在な連結構造からなる。 Further, the joint R1 of the divided members 19 and 20 has a stretchable structure, while the joint R2 of the divided members 20 and 21 and the joint R3 of the divided members 19 and 21 have a connecting structure that can be bent in the directions of arrows C and D. Become.

まず、図３に基づき接合部Ｒ１の伸縮構造を説明すれば、対向する分割部材１９，２０の端板１９ｃ，２０ｃに形成された図示省略の一対の貫通孔には、それぞれ雄ねじ部材としてのボルト２５の軸部２５ａが挿通される。ここで挿通された各ボルト２５の軸部２５ａには、雌ねじ部材としてのナット２６〜２８が締結されている。このときナット２６の締結によりボルト２５の頭部２５ｂが端板２０ｃに固定される一方、ナット２７，２８間に端板１９ｃが位置している。 First, the expansion / contraction structure of the joint portion R1 will be described with reference to FIG. 3. A pair of through holes (not shown) formed in the end plates 19c and 20c of the opposing divided members 19 and 20 are respectively bolts as male screw members. 25 shaft portions 25a are inserted. Nuts 26 to 28 as female screw members are fastened to the shaft portions 25a of the bolts 25 inserted here. At this time, the head 25 b of the bolt 25 is fixed to the end plate 20 c by fastening the nut 26, while the end plate 19 c is positioned between the nuts 27 and 28.

したがって、雌ねじ部材としてのナット２７，２８の締結位置を調整することで分割部材１９，２０間の距離Ｌを伸縮させることができる。すなわち、工具などでナット２７，２８を一方向に回転させたときに前記締結位置がＳ方向に移動し、前記距離Ｌが短縮されて固定具１６の円周方向の長さが短くなる。一方、ナット２７，２８を他方向に回転させたときに前記締結位置がＴ方向に移動し、前記距離Ｌの長さが延長されて固定具１６の円周方向の長さが伸長する。 Therefore, the distance L between the divided members 19 and 20 can be expanded and contracted by adjusting the fastening positions of the nuts 27 and 28 as the female screw members. That is, when the nuts 27 and 28 are rotated in one direction with a tool or the like, the fastening position moves in the S direction, the distance L is shortened, and the circumferential length of the fixture 16 is shortened. On the other hand, when the nuts 27 and 28 are rotated in the other direction, the fastening position moves in the T direction, the length of the distance L is extended, and the circumferential length of the fixture 16 is extended.

つぎに図４に基づき接合部Ｒ２の連結構造を説明する。ここでは分割部材２０，２１の端部は、それぞれ左右の側板２０ｂ，２１ｂから延設された一対の支持板２９ａを有している。この各支持板２９ａに形成された図示省略の孔部には軸部としての差込ピン２９が回転自在に挿通され、接合部Ｒ２は差込ピン２９を介して矢印Ｃ，Ｄ方向に折り曲げることが可能となっている。なお、接合部Ｒ３は、接合部Ｒ２と同様な構造とする（図４中のかっこ内は接合部Ｒ３の符号を示している。）。 Next, the connection structure of the joint R2 will be described with reference to FIG. Here, the end portions of the split members 20 and 21 have a pair of support plates 29a extending from the left and right side plates 20b and 21b, respectively. An insertion pin 29 as a shaft portion is rotatably inserted in a hole (not shown) formed in each support plate 29a, and the joint portion R2 is bent in the directions of arrows C and D via the insertion pin 29. Is possible. The joint R3 has the same structure as that of the joint R2 (the parentheses in FIG. 4 indicate the sign of the joint R3).

したがって、本実施形態の固定具１６により接続ケーブル１５ａをマンホールＭの内壁Ｍ１に固定する際は、接合部Ｒ２，Ｒ３を矢印Ｄ方向に折り曲げた後に前記多機能型のマンホール蓋１０を開けて固定具１６をマンホールＭ内に搬入する。このとき固定具１６は、接合部Ｒ２，Ｒ３を折り曲げれば小型化するため、マンホールＭ内に既設の点検用ステップ等の固定部材があっても支障なく、搬入でき可搬性が良い。 Therefore, when the connection cable 15a is fixed to the inner wall M1 of the manhole M by the fixture 16 of this embodiment, the multifunctional manhole cover 10 is opened and fixed after the joints R2 and R3 are bent in the direction of arrow D. The tool 16 is carried into the manhole M. At this time, since the fixture 16 is reduced in size by bending the joints R2 and R3, even if there is a fixing member such as an existing inspection step in the manhole M, it can be carried in without any trouble and has good portability.

そして、マンホールＭ内への搬入後は接合部Ｒ２，Ｒ３を矢印Ｃ方向に折り曲げて固定具１６をリング状（円形）の形状に戻す。その後に雌ねじ部材としてのナット２７，２８を、工具などで他方向に回転させて固定具１６の円周方向の長さを伸長させ、マンホールＭの内壁Ｍ１に押しつけることで固定具１６が該内壁Ｍ１に取り付けられる。このとき固定具１６は、円周方向の長さが伸縮自在なため、内壁Ｍ１の内径の大小に拘わらずに環状面に取り付けることができ、また弾性体２４により内壁Ｍ１への当たりも緩和されている。 And after carrying in in the manhole M, joining part R2, R3 is bend | folded in the direction of arrow C, and the fixing tool 16 is returned to a ring-shaped (circular) shape. Thereafter, the nuts 27 and 28 as female screw members are rotated in the other direction with a tool or the like to extend the circumferential length of the fixture 16 and are pressed against the inner wall M1 of the manhole M so that the fixture 16 is attached to the inner wall. Attached to M1. At this time, since the circumferential length of the fixture 16 is freely expandable and contractable, it can be attached to the annular surface regardless of the inner diameter of the inner wall M1, and the elastic body 24 also reduces the contact with the inner wall M1. ing.

続いて接続ケーブル１５ａを、前記多機能型の前記マンホール蓋１０の開閉時にケーブルの張力が加わらないようにケーブル長に余裕をもたせた状態で、固定具１６の被固定部材固定個所Ｑ（図１参照）に、固定手段としてのクランプやＵボルトなどの汎用の金具を利用して固定する。この被固定部材固定箇所Ｑは、作業員の支障とならない位置、例えば既設の点検用ステップを避けた位置などが好ましい。 Subsequently, in the state where the cable length is provided so that the cable tension is not applied when the connection hole 15a is opened and closed when the multifunctional manhole cover 10 is opened and closed, the fixing member fixing portion Q (FIG. 1). (See reference), and fixing using a general-purpose metal fitting such as a clamp or a U-bolt. The fixed member fixing portion Q is preferably a position that does not hinder the worker, for example, a position that avoids an existing inspection step.

その結果、本実施形態の固定具１６によれば、被固定部材としての接続ケーブル１５ａなどを、マンホールＭの内壁Ｍ１に特別な工事を施すことなく、簡単に固定することができる。これにより被固定部材の固定にあたって、特許文献１のようにマンホールＭの内壁Ｍ１の剛性や強度の制約を受けることはなく、またマンホールＭの内壁Ｍ１の脆弱化を生じることもない。 As a result, according to the fixture 16 of the present embodiment, the connection cable 15a or the like as a member to be fixed can be easily fixed without performing any special work on the inner wall M1 of the manhole M. Thereby, when fixing the member to be fixed, the rigidity and strength of the inner wall M1 of the manhole M are not restricted as in Patent Document 1, and the inner wall M1 of the manhole M is not weakened.

一方、固定具１６の取外しに際しては、被固定部材としての接続ケーブル１５ａなどを固定具１６から外した後に工具などで雌ねじ部材としてのナット２７，２８を一方向に回転させればよく、この点でマンホールＭの内壁Ｍ１から簡単に取り外すことができ、また取外し後はマンホールＭの内壁Ｍ１に穿孔が残ることもない。 On the other hand, when the fixing tool 16 is removed, the connection cable 15a as the fixed member may be removed from the fixing tool 16, and then the nuts 27 and 28 as the female screw members may be rotated in one direction with a tool. Thus, it can be easily removed from the inner wall M1 of the manhole M, and no perforation remains on the inner wall M1 of the manhole M after the removal.

≪実施例２≫
図５は固定具１６が２個の場合の実施例を示している。ここではマンホールＭの内壁Ｍ１の上下に固定具１６が取り付けられ、それぞれの固定具１６の被固定部材固定箇所Ｑ１，Ｑ２において接続ケーブル１５ａが固定されている。 << Example 2 >>
FIG. 5 shows an embodiment in which there are two fixtures 16. Here, the fixture 16 is attached to the upper and lower sides of the inner wall M1 of the manhole M, and the connection cable 15a is fixed at the fixing member fixing portions Q1 and Q2 of the respective fixtures 16.

この実施例２によれば、接続ケーブル１５ａは上下二箇所で固定されるため、下水道管渠Ｐ内に激しい水流が生じた場合でも安定し、計測器１５の内壁Ｍ１への衝突などによる損傷が防止できる。 According to the second embodiment, since the connection cable 15a is fixed at two positions, the connection cable 15a is stable even when a violent water flow is generated in the sewer pipe P, and damage due to a collision with the inner wall M1 of the measuring instrument 15 is caused. Can be prevented.

なお、接続ケーブル１５ａの固定方法は実施例１と同様とし、また被固定部材固定箇所Ｑ１，Ｑ２は作業員の支障とならない位置、例えば既設の点検用ステップを避けた位置などが好ましい。 The fixing method of the connection cable 15a is the same as that of the first embodiment, and the fixed member fixing portions Q1 and Q2 are preferably at positions that do not hinder the worker, for example, positions that avoid existing inspection steps.

≪実施例３≫
図６は、接続ケーブル１５ａが挿通された被固定部材としての筒状ガイド３０を固定具１６に取り付けた実施例を示している。この筒状ガイド３０は、耐食性を有しており、変形しても支障が無ければ材質は特に限定されず、例えばステンレスなどの金属や樹脂などから選択される。また、筒状ガイド３０の形状は、円筒状でもよく、角筒状でもよいものとする。 Example 3
FIG. 6 shows an embodiment in which a cylindrical guide 30 as a fixed member into which the connection cable 15 a is inserted is attached to the fixture 16. The cylindrical guide 30 has corrosion resistance and is not particularly limited as long as there is no problem even if it is deformed. For example, the cylindrical guide 30 is selected from metals such as stainless steel and resins. In addition, the cylindrical guide 30 may have a cylindrical shape or a rectangular tube shape.

ここでは実施例２と同様にマンホールＭの内壁Ｍ１の上下に固定具１６が取り付けられる。この取り付け後に筒状ガイド３０を、各固定金具１６の被固定部材固定箇所Ｑ１´，Ｑ２´に固定手段としてのＵ字ボルトや固定バンドなどの汎用の固定金具を利用して固定する。この被固定部材固定箇所Ｑ１´，Ｑ２´は、実施例２の被固定部材固定箇所Ｑ１，Ｑ２と同じく作業員の支障とならない位置、例えば既設の点検用ステップを避けた位置などが好ましい。 Here, as in the second embodiment, the fixture 16 is attached to the top and bottom of the inner wall M1 of the manhole M. After this attachment, the cylindrical guide 30 is fixed to the fixing member fixing portions Q1 ′ and Q2 ′ of the fixing brackets 16 using general-purpose fixing brackets such as U-bolts and fixing bands as fixing means. The fixed member fixing points Q1 'and Q2' are preferably positions that do not hinder the worker, for example, positions that avoid existing inspection steps, as with the fixed member fixing points Q1 and Q2 of the second embodiment.

図７および図８は、固定手段としてのＵ字ボルト３１を利用した筒状ガイド３０の固定例を示している。ここでは被固定部材固定箇所Ｑ１´，Ｑ２´として上下の分割部材１９の位置が選択され、連通孔２３に挿通されたボルト３２に図示省略のナットを締結して取付台３３が両側板１９ｂに取り付けられている。 7 and 8 show examples of fixing the cylindrical guide 30 using U-shaped bolts 31 as fixing means. Here, the positions of the upper and lower divided members 19 are selected as the fixed member fixing locations Q1 ′ and Q2 ′, and nuts (not shown) are fastened to the bolts 32 inserted into the communication holes 23, so that the mounting bases 33 are attached to both side plates 19b. It is attached.

この取付台３３にＵ字ボルト３１の軸部を締結することで筒状ガイド３０が固定具１６に固定されている。これにより接続ケーブル１５ａを、固定具１６に直接取り付けることなく、マンホールＭの内壁Ｍ１に固定することができる。 The cylindrical guide 30 is fixed to the fixture 16 by fastening the shaft portion of the U-shaped bolt 31 to the mounting base 33. Accordingly, the connection cable 15a can be fixed to the inner wall M1 of the manhole M without being directly attached to the fixture 16.

このとき筒状ガイド３０の下端部が固定される固定具１６を測定水面Ｗの付近に取り付ければ、激しい水流が生じた場合でも安定性がさらに向上する。なお、実施例２，３のように固定具１６を上下二段に使用した場合、筒状ガイド３０に代えて縦長のセンサデバイスを固定することもできる。 At this time, if the fixture 16 to which the lower end portion of the cylindrical guide 30 is fixed is attached in the vicinity of the measurement water surface W, the stability is further improved even when a severe water flow occurs. When the fixtures 16 are used in two upper and lower stages as in the second and third embodiments, a vertically long sensor device can be fixed instead of the cylindrical guide 30.

≪その他≫
本発明は上記実施形態に限定されるものではなく、各請求項に記載された範囲内で変形して実施することができる。特に前記多機能型のマンホール蓋１０は、下水道管渠Ｐ内の維持管理に必要なデータを収集するため、複数種類の計測器１５を備える場合が少なくない。 ≪Others≫
The present invention is not limited to the above-described embodiments, and can be modified and implemented within the scope described in each claim. In particular, the multifunctional manhole cover 10 often includes a plurality of types of measuring instruments 15 in order to collect data necessary for maintenance in the sewer pipe P.

例えば前記多機能型のマンホール蓋１０が下水道管渠Ｐ内の環境を監視する場合には、水位センサだけではなく、ｐＨ，濁度，硫化水素などの環境情報を計測するセンサデバイスも併用される。この各センサデバイスを前記多機能型のマンホール蓋１０の外部に設置する場合、水位センサと同じく接続ケーブルを固定具１６に取り付ければ、複数の接続ケーブルをマンホールＭの内壁Ｍ１に固定することができる。 For example, when the multifunctional manhole cover 10 monitors the environment in the sewer pipe P, not only a water level sensor but also a sensor device for measuring environmental information such as pH, turbidity, hydrogen sulfide, etc. is used in combination. . When each sensor device is installed outside the multi-function manhole cover 10, a plurality of connection cables can be fixed to the inner wall M <b> 1 of the manhole M by attaching a connection cable to the fixture 16 in the same manner as the water level sensor. .

その際、実施例３のように複数の筒状ガイド３０を固定具１６に取り付けてもよく、またセンサデバイスのディストリビュータ（変換器）を無線通信制御部１２の外部に設置する場合は、被固定部材としての該変換器の収納箱を固定具１６に取り付けてもよい。 At this time, a plurality of cylindrical guides 30 may be attached to the fixture 16 as in the third embodiment, and when the distributor (converter) of the sensor device is installed outside the wireless communication control unit 12, it is fixed. A storage box of the converter as a member may be attached to the fixture 16.

このように複数の被固定部材（接続ケーブル，変換器収納箱など）をマンホールＭの内壁Ｍ１に固定する場合には、その被固定部材数に応じて適宜に固定具１６の個数を増加させることが好ましい。なお、本発明の固定具１６は、マンホールＭの内壁Ｍ１だけでなく、環状面であればよく、内径の大小にかかわらず被固定部材を固定することができる。 In this way, when a plurality of fixed members (connection cables, converter housing boxes, etc.) are fixed to the inner wall M1 of the manhole M, the number of fixtures 16 is appropriately increased according to the number of fixed members. Is preferred. In addition, the fixing tool 16 of this invention should just be not only the inner wall M1 of the manhole M but an annular surface, and can fix a to-be-fixed member irrespective of the magnitude | size of an internal diameter.

１５ａ…接続ケーブル（被固定部材）
１６…固定具
１９〜２１…分割部材
２４…弾性体
２５…ボルト（雄ねじ部材）
２５ａ…ボルト軸部（雄ねじ部材）
２６〜２８…ナット（雌ねじ部材）
２９…差込ピン（軸部）
Ｍ…マンホール
Ｍ１…内壁（環状面）
Ｒ１〜Ｒ３…接合部 15a ... Connection cable (fixed member)
DESCRIPTION OF SYMBOLS 16 ... Fixing device 19-21 ... Dividing member 24 ... Elastic body 25 ... Bolt (male screw member)
25a ... Bolt shaft (male screw member)
26-28 ... nut (female screw member)
29 ... Insertion pin (shaft)
M ... Manhole M1 ... Inner wall (annular surface)
R1-R3 ... Junction

Claims

環状面に被固定部材を固定するために用いる固定具であって、
リング状に接続される複数の分割部材と、該分割部材同士の接合部の少なくとも１か所を構成する伸縮構造とを備え、
前記伸縮構造により前記分割部材同士の距離を伸長させて前記環状面に取り付けられるとともに、
前記被固定部材が固定手段により前記分割部材に固定されることを特徴とする固定具。 A fixing tool used for fixing a member to be fixed to an annular surface,
A plurality of divided members connected in a ring shape, and a stretchable structure that constitutes at least one of the joints between the divided members;
The stretched structure is attached to the annular surface by extending the distance between the divided members,
The fixing member, wherein the fixed member is fixed to the split member by a fixing means.

少なくとも三つ以上の前記分割部材を備え、
前記伸縮構造を除く他の前記接合部が、内外方向に折り曲げ自在な連結構造により構成されていることを特徴とする請求項１記載の固定具。 Comprising at least three or more of the divided members;
The fixture according to claim 1, wherein the joint portion other than the stretchable structure is configured by a connecting structure that can be bent inward and outward.

前記伸縮構造は、対向する一方の前記分割部材の端部に頭部が固定された雄ねじ部材と、他方の前記分割部材の端部に挿通された前記雄ねじ部材に締結される雌ねじ部材とを備え、
前記雌ねじ部材の締結位置を調整することで前記分割部材同士の距離を伸縮させることを特徴とする請求項１または２のいずれか１項に記載の固定具。 The telescopic structure includes a male screw member having a head fixed to an end portion of one of the opposing split members, and a female screw member fastened to the male screw member inserted into the end portion of the other split member. ,
3. The fixing device according to claim 1, wherein the distance between the divided members is expanded and contracted by adjusting a fastening position of the female screw member. 4.

前記折り曲げ自在な連結構造は、軸部を介して前記分割部材の端部同士を内外方向に回動自在に接続した
ことを特徴とする請求項１〜３のいずれか１項に記載の固定具。 The fixture according to any one of claims 1 to 3, wherein the bendable connecting structure is configured such that ends of the split members are pivotably connected inward and outward via a shaft portion. .

前記分割部材の外周に弾性体を設けたことを特徴とする請求項１〜４のいずれか１項に記載の固定具。 The fixture according to any one of claims 1 to 4, wherein an elastic body is provided on an outer periphery of the divided member.