JPS6226986Y2 - - Google Patents
Info
- Publication number
- JPS6226986Y2 JPS6226986Y2 JP1980097635U JP9763580U JPS6226986Y2 JP S6226986 Y2 JPS6226986 Y2 JP S6226986Y2 JP 1980097635 U JP1980097635 U JP 1980097635U JP 9763580 U JP9763580 U JP 9763580U JP S6226986 Y2 JPS6226986 Y2 JP S6226986Y2
- Authority
- JP
- Japan
- Prior art keywords
- cable
- flange portion
- conduit
- metal fitting
- cylindrical metal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 230000000452 restraining effect Effects 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 6
- 238000012856 packing Methods 0.000 claims description 2
- 230000002265 prevention Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000008602 contraction Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
Landscapes
- Details Of Indoor Wiring (AREA)
- Laying Of Electric Cables Or Lines Outside (AREA)
Description
【考案の詳細な説明】
本考案は管路内に布設されたケーブルの波乗り
等によるケーブルの移動を、阻止するケーブルの
移動防止装置の改良に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a cable movement prevention device that prevents movement of a cable installed in a conduit due to wave riding or the like.
一般に、地盤の悪い道路の下に布設された管路
内布設ケーブル線路においては、道路を走行する
車輛等により、ケーブルが車輛の走行方向に向か
つて移動する。 Generally, in a cable line laid in a conduit laid under a road with poor ground, the cable moves in the direction of travel of the vehicle by a vehicle or the like traveling on the road.
この現象は、簡単には第１図により説明され
る。すなわち、車輛１の重量によつて地盤２が変
形し、これによつて管路３が点線で示すようにた
わんで、沈下する。しかして車輛１の走行に従つ
て沈下部分も移動する。このため、この沈下波に
よつて管路内に布設されているケーブル４が僅か
づつ車輛１の走行方向５に移動する。 This phenomenon is briefly explained by FIG. That is, the ground 2 is deformed by the weight of the vehicle 1, and as a result, the conduit 3 bends and sinks as shown by the dotted line. As the vehicle 1 travels, the sunken portion also moves. Therefore, the cable 4 laid in the conduit is moved little by little in the traveling direction 5 of the vehicle 1 due to this sinking wave.
言い替えれば、たわんで沈下した管路の中に、
余剰の長さを持つたケーブル４が落ち込み、これ
が管路の波と一諸に運ばれるために生ずるのであ
る。 In other words, inside a pipe that has sagged and sunk,
This occurs because the excess length of the cable 4 falls and is carried along with the waves of the conduit.
しかるに、管路にこのような現象が生ずると、
管路内に布設されたケーブルは等価的に車輛の走
行と同時に、走行方向５に添つたしごき力を受け
ることになる。このしごき力は車輛の走行ごとに
繰り返しケーブルに作用する。このため、従来の
ように一方のマンホール端でケーブルを固定した
のでは、第２図に示すようにケーブルの張力が次
第に上昇する。 However, if such a phenomenon occurs in the pipe,
The cable installed in the conduit is equivalently subjected to a straining force along the traveling direction 5 at the same time as the vehicle travels. This straining force acts on the cable repeatedly every time the vehicle runs. For this reason, if the cable is fixed at one end of the manhole as in the past, the tension in the cable will gradually increase as shown in FIG.
すなわち、最初の車輛の走行によりしごき力
T1が作用し、その後、走行回数ごとに順次T2，
T3…Ｔoとしごき力が増大し最終値に達する。こ
の時発生するケーブルの最大拘束力は「μwl」
で表わされる。 In other words, the squeezing force is increased by the initial running of the vehicle.
T 1 acts, and then T 2 ,
T 3 ...T o and the squeezing force increases and reaches the final value. The maximum cable restraint force generated at this time is "μwl"
It is expressed as
但し μ：管路とケーブルとの摩擦抵抗 ｗ：ケーブルの単位重量 ｌ：ケーブルの布設ルート長さ を示している。 however μ: Frictional resistance between conduit and cable w: Unit weight of cable l: Cable installation route length It shows.
この大きさはケーブルサイズや布設ルートの条
件にもよるが、大体500〜2000Kgにも達する。 This size depends on the cable size and the conditions of the installation route, but it can reach approximately 500 to 2000 kg.
このように、かかる張力を、一方の管路口端で
拘束することは、拘束装置全体を大型化しなけれ
ばならない等、非常に困難であり、またOFケー
ブル等においては、鉛被等の金属シースに亀裂が
発生する等の不都合がある。 In this way, it is extremely difficult to restrain such tension at one end of the conduit, as the entire restraining device must be enlarged, and in OF cables, etc., it is difficult to restrain the tension at one end of the pipe. There are inconveniences such as cracks occurring.
本考案はこのような点に着目してなされたもの
で、管路口の両端部近傍に発条部材を用いた拘束
装置を配置することにより前述の不都合を解消せ
んとするものである。 The present invention has been developed with attention to these points, and is intended to solve the above-mentioned disadvantages by arranging a restraining device using a spring member near both ends of the conduit opening.
最初に、本考案の力学的原理を説明する。第３
図に示すようにケーブル６の両端に発条７，７′
を配置し、これによつてケーブル６を拘束してい
る場合を想定する。 First, the mechanical principle of the present invention will be explained. Third
As shown in the figure, springs 7 and 7' are attached to both ends of the cable 6.
Assume that the cable 6 is restrained by this arrangement.
ここでケーブルにＦなる力を与えると、スプリ
ング定数をｋとすれば、ケーブルの変位δは、
δ＝Ｆ／２ｋ（Ｆ＞μwl）
となる。 Here, when a force of F is applied to the cable, and if the spring constant is k, the displacement δ of the cable becomes δ=F/2k (F>μwl).
しかしてＦ＝０とすると、ケーブルの残留変位
δ′は、
δ′＝μｗｌ／２ｋとなる。 Therefore, when F=0, the residual displacement δ' of the cable becomes δ'=μwl/2k.
従つて適当な発条部材を選定することにより、
ケーブルをμｗｌ／２の張力で拘束することが可能で
ある。 Therefore, by selecting an appropriate spring member,
It is possible to constrain the cable with a tension of μwl/2.
次に、本考案を一実施例の図面に基づいて説明
する。第４図において、管路８内にはケーブル９
が布設され、この布設ルートの中間適所にはマン
ホール１０，１０′が形成されている。１１，１
１′はマンホール１０，１０′側壁に配置されたケ
ーブル拘束装置を示している。 Next, the present invention will be explained based on the drawings of one embodiment. In FIG. 4, there is a cable 9 inside the conduit 8.
is laid, and manholes 10, 10' are formed at appropriate locations in the middle of this laying route. 11,1
1' indicates a cable restraint device arranged on the side wall of the manhole 10, 10'.
拘束装置１１，１１′は第５図に示すように、
パツキン１２を介してケーブル９を抱持緊締する
分割型筒状金具１３と、筒状金具１３の中央部外
周に設けられ、円周方向に複数個の貫通孔１４を
備えるフランジ部１５と、貫通孔１４を遊貫し、
先端が例えばマンホール側壁部１６に例えばネジ
止めされた複数本の拘束体１７と、拘束体１７の
後端に例えば螺嵌によつて固設された抑止体１８
と、マンホール側壁部１６とフランジ部１５間並
びにフランジ部１５と抑止体１８間にそれぞれ遊
嵌された発条部材１９，１９′とで構成されてい
る。そして、この発条部材１９，１９′は予め必
要なストロークだけ押し込まれてセツトされる。 The restraint devices 11, 11' are as shown in FIG.
A split cylindrical metal fitting 13 that holds and tightens the cable 9 via a packing 12, a flange portion 15 provided on the outer periphery of the central part of the cylindrical metal fitting 13 and having a plurality of through holes 14 in the circumferential direction, Penetrating the hole 14 loosely,
A plurality of restraining bodies 17 whose tips are screwed, for example, to the manhole side wall 16, and a deterrent body 18 fixed to the rear end of the restraining bodies 17 by, for example, screw fitting.
and spring members 19, 19' which are loosely fitted between the manhole side wall 16 and the flange 15 and between the flange 15 and the restraining body 18, respectively. The spring members 19, 19' are set by being pushed in in advance by a required stroke.
ここで、前記各拘束装置１１，１１′は次のよ
うに作用する。すなわち、ケーブル９が左方向に
移動すると、左側の拘束装置１１の発条部材１９
が伸びると共に発条部材１９′が縮みこれによつ
て各発条部材１９，１９′の反力が右方向に動
く。一方、これと同時に右側の拘束装置１１′の
発条部材１９が縮むと共に発条部材１９′が伸び
各発条部材１９，１９′の反力が右方向に働く。
これらの発条部材１９，１９′はケーブル９が右
方向に移動したときも同様に作用し同様の効果を
発揮する。従つて、本考案によれば上述した従来
例の拘束装置と同じ拘束力を得るのに各拘束装置
１１，１１′の拘束力を1/2に減ずることができ、
ひいては４個の発条部材１９，１９′によりケー
ブルの拘束力を比べ1/4に減ずることができる。 Here, each of the restraining devices 11, 11' functions as follows. That is, when the cable 9 moves to the left, the spring member 19 of the left restraint device 11
As the spring members 19, 19' extend, the spring members 19' contract, thereby causing the reaction force of each spring member 19, 19' to move to the right. On the other hand, at the same time, the spring member 19 of the right restraint device 11' is contracted and the spring member 19' is expanded, and the reaction force of each spring member 19, 19' acts in the right direction.
These spring members 19, 19' act in the same manner and produce the same effect even when the cable 9 moves to the right. Therefore, according to the present invention, the restraint force of each restraint device 11, 11' can be reduced to 1/2 in order to obtain the same restraint force as the conventional restraint device described above.
As a result, the four spring members 19, 19' can reduce the cable restraining force to 1/4.
このように本考案においては、ケーブルの両端
を発条部材１９，１９′により拘束しているの
で、従来と比較しケーブルの拘束力を1/4に減ず
ることができ、もつて拘束装置全体を小型化でき
る。また波乗り移動現象によつて車輛の走行方向
にケーブルが移動しようとしても、ケーブルの両
端に配置された発条部材の反発作用により極端な
ケーブルの移動現象がなくなる。従つてケーブル
を安全に固定することが可能であり、これによつ
てOFケーブル等の鉛被亀裂破損や、ケーブル変
形等の破損事故を防ぐことができる。 In this way, in the present invention, since both ends of the cable are restrained by the spring members 19, 19', the cable restraint force can be reduced to 1/4 compared to the conventional method, and the entire restraint device can be made smaller. can be converted into Furthermore, even if the cable attempts to move in the traveling direction of the vehicle due to wave-riding movement, the repulsive action of the spring members disposed at both ends of the cable eliminates the extreme movement of the cable. Therefore, it is possible to safely fix the cable, thereby preventing damage to the OF cable due to lead cracks, cable deformation, etc.
更に本考案においては、ケーブルの熱伸縮現象
をも吸収することができるので、オフセツト部の
保護等も合わせて行なうことができる。 Furthermore, in the present invention, it is possible to absorb the phenomenon of thermal expansion and contraction of the cable, so that the offset portion can also be protected.
第１図はケーブルの波乗り移動現象の説明図、
第２図は車輛の走行と、ケーブルの張力との関係
を示す説明図、第３図は本考案の原理を示す説明
図、第４図は本考案におけるケーブルの拘束状況
を示す説明図、第５図は本考案の一実施例を示す
拘束装置の縦断面図である。
８……管路、９……ケーブル、１０，１０′…
…マンホール、１１，１１′……拘束装置、１３
……筒状金具、１５……フランジ部、１６……側
壁部、１７……拘束体、１８……拘止体、１９，
１９′……発条部材。
Figure 1 is an explanatory diagram of the wave-riding movement phenomenon of cables.
Fig. 2 is an explanatory diagram showing the relationship between vehicle running and cable tension; Fig. 3 is an explanatory diagram showing the principle of the present invention; Fig. 4 is an explanatory diagram showing the cable restraint situation in the present invention; FIG. 5 is a longitudinal sectional view of a restraint device showing an embodiment of the present invention. 8... Conduit, 9... Cable, 10, 10'...
...manhole, 11,11'...restraint device, 13
... Cylindrical metal fitting, 15 ... Flange part, 16 ... Side wall part, 17 ... Restriction body, 18 ... Restriction body, 19,
19'...Spring member.
Claims (1)
部近傍においてそれぞれ拘束装置により拘束する
ものにおいて、前記拘束装置が、パツキンを介し
てケーブルを保持する筒状金具と、該筒状金具の
外周に設けられ、円周方向に複数個の貫通孔を備
えるフランジ部と、該フランジ部の貫通孔を遊貫
し、先端が管路壁に固着された複数本の拘束体
と、該拘束体のそれぞれの後端に固設された抑止
体と、前記管路壁とフランジ部間並びに前記フラ
ンジ部と抑止体間にそれぞれ遊嵌された複数本の
発条部材とで構成されていることを特徴とするケ
ーブルの移動防止装置。 In a system in which a cable installed in a conduit is restrained by a restraining device near both ends of the conduit opening, the restraining device includes a cylindrical metal fitting that holds the cable via a packing, and a cylindrical metal fitting on the outer periphery of the cylindrical metal fitting. a flange portion provided with a plurality of through holes in the circumferential direction; a plurality of restraint bodies passing loosely through the through holes of the flange portion and having tips fixed to a pipe wall; and each of the restraint bodies. It is characterized by comprising a deterrent body fixed to the rear end, and a plurality of spring members loosely fitted between the pipe wall and the flange portion and between the flange portion and the deterrent body. Cable movement prevention device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1980097635U JPS6226986Y2 (en) | 1980-07-11 | 1980-07-11 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1980097635U JPS6226986Y2 (en) | 1980-07-11 | 1980-07-11 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5663222U JPS5663222U (en) | 1981-05-28 |
| JPS6226986Y2 true JPS6226986Y2 (en) | 1987-07-10 |
Family
ID=29330425
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1980097635U Expired JPS6226986Y2 (en) | 1980-07-11 | 1980-07-11 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6226986Y2 (en) |
-
1980
- 1980-07-11 JP JP1980097635U patent/JPS6226986Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5663222U (en) | 1981-05-28 |
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