JPH0750843Y2 - Solid structure of elongated body in groove - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a structure for fixing a cable protection tube or a long body disposed in a groove used for fixing a cable in a groove of a trough or the like. .

<Prior Art> When laying a cable in a trough, the number of cables should be 8
As shown in Fig. A, the cables 2 ', 2'may be gripped by the cleat 3'at a predetermined interval. According to such a cable laying method, thermal expansion and contraction of the cable causes a sinusoidal deformation with the cleat as a fulcrum. Since it can be absorbed by (so-called snake deformation) and the cable can be uniformly expanded and contracted over the entire length of the cable, it is possible to prevent occurrence of abnormal strain due to local deformation of the cable.

In this case, in the conventional case, as shown in FIG. 8B, the cable receiving member 31 'is inserted into the anchor bolts 30', 30 'fixed to the trough 1', and then the cables 2 ', 2'are laid. Then, after that, the pressing member 32 'is inserted into the cable anchor bolts 30', 30 ', and the nuts 33' are tightened to hold the cables 2 ', ... By the members 31', 32 '.

<Problems to be solved> However, according to such a cable fixing structure, the cleat serves as a weir for rainwater that has flowed into the trough or spring water that has entered through the joints of the trough, and water easily accumulates in the trough, There is a problem that drainage is not done smoothly. Also, anchor bolts need to be fixed to the trough, cable receiving members must be installed before laying the cable, and the space inside the trough is narrow, so the operation of tools to tighten the nuts on the anchor bolts is a work space. It is not easy to do and has the disadvantage that it takes time and effort.

When laying a cable protection tube in the trough, gripping the cable protection tube with a cleat at predetermined intervals, and pulling the cable into the cable protection tube, there are the same problems as described above. In the case of a flexible lightweight pipe such as an attached plastic pipe, there is also a disadvantage that the cable protection pipe floats and bends due to accumulated water, the linearity cannot be maintained, and it becomes difficult to pull in the cable.

An object of the present invention is to provide a fixing structure such as a juxtaposed pipe in a groove which can easily fix a cable in a trough or a cable protection pipe without fear of water pools in the trough.

<Means for Solving the Problems> In the fixing structure according to the present invention, an elongated body, for example, a protection tube or a cable is laid on the bottom surface of the groove, and the holding member having the elongated holding groove is the groove. The bottom surface of the pressing member and the bottom surface of the groove are fitted into each other and are separated by a gap.

<Description of Embodiments> Hereinafter, embodiments of the present invention will be described with reference to the drawings.

1A is a plan view showing an embodiment of the present invention, and FIG. 1B is a sectional view taken along line bb in FIG. 1A.

In FIGS. 1A and 1B, 1 is a cable storage groove, and a concrete trough is used in the illustrated embodiment. 2, ... are cable protection tubes laid in the cable storage groove, and in the illustrated embodiment, corrugated plastic tubes are used. 3 is a pressing member,
The trough 1 is provided with a holding groove 31 for the cable protection tube.
It is fitted inside, and the holding groove 31 is fitted to the cable protection tube 2, and the cable protection tubes 2, ... Are supported by the trough inner bottom surface 11. A gap 4 separates the pressing member 3 and the trough inner bottom surface 11.

The pressing member 3 is fitted into the trough 1 against the compression reaction force of the pressing member, and a strong contact pressure corresponding to the compression reaction force acts between the pressing member and the inner surface of the trough. And its fitting strength is high.

The pressing member 3 can be molded by thermosetting resin foam, for example, FRP in which hard foam urethane resin is reinforced with glass fiber, and U notches 32, 32 are provided as shown in FIG.
It is desirable to make 3,33 a tapered surface. This pressing member 3
In the case of (1), the taper on both sides facilitates the pushing into the trough 1, and due to the drawing reaction force of the U notch 32, a sufficient pressure contact force is applied to the contact surface between the pressing member 3 and the trough 1. obtain.

The pressing member 3 may be made of FRP or hard rubber other than the above, and when the hard rubber is used, the U notch can be omitted.

As shown in FIG. 3, if the U notch 32 is filled with the rubber elastic body 34, a contact pressure corresponding to the compression reaction force of the rubber elastic body can be applied to the contact surface between the pressing member and the trough, and
Due to the excellent elasticity of the rubber elastic body 34, the stability of the contact surface pressure can be increased. As shown in FIG. 4, rubber plates 35, 35 may be attached to the side surface of the pressing member 3. Further, the same side surface may be formed in an uneven shape. As shown in FIG. 5, the rubber elastic body 1
Alternatively, the spring 36 may be attached to the U notch 32.

Further, as shown in FIG. 6, after the pressing member 3 is pushed into the trough 1, the wedge 37 can be driven into the U notch 32.
Even if the pressing member 3 is made of hard rubber, a wedge can be driven by providing a U notch. The wedge 37 can be made of the same material as the pressing member, FRP, metal, ceramic, or the like.

Also, the number of U notches may be one, and in this case,
The U notch 32 is preferably provided at the center of the pressing member 3 as shown in FIGS. 5 and 7.

When the cable protection pipe laid inside the cable trough is fixed at predetermined intervals by the above-mentioned fixing structure and the construction of the cable protection pipe is completed, then the cable is pulled into the cable protection pipe at a proper time.

In the cable protection conduit fixed in the trough according to the present invention, since the gap 4 exists between the lower surface of the pressing member 3 and the bottom surface 11 of the trough 1, rainwater and spring water enter the trough 1. However, the intruding water can flow out through the gap 4 and the water pool can be prevented. Therefore, it is possible to prevent the cable protection tube 2, for example, the corrugated plastic tube from floating and bending, so that the cable can be smoothly drawn. Further, even if the drawn cable is thermally expanded or contracted due to energization or the like, since the cable protection tube 2 is fixed at a predetermined interval, the cable can be deformed into a sine wave with the fixed point as a fulcrum, The heat expansion and contraction can be absorbed well.

In the above, the number of the cable protection tubes 2 arranged side by side may be three or more. Further, only one cable protection tube 2 may be provided. Furthermore, when a plurality of cables are installed side by side, at first, a part of the cable is laid, and the laid cable protection tube is fixed by the above-mentioned fixing structure, and the cable is pulled in to energize and hold down the pressing member when the load increases at a later date. From the trough, lay the remaining cable protection tube inside the trough, fit the holding member to the trough again, and fix the existing and new cable protection tubes with the above-mentioned fixing structure. You can also pull in an extension cable.

In any of the above examples, the cable protection pipe is laid in the trough, the cable protection pipe is fixed in the trough, and the cable is drawn into these cable protection pipes.
The present invention can be applied to a case where a cable is laid inside a cable trough and the cable is fixed inside the trough. In the above-mentioned embodiment, the tubular body having a circular cross section is described as the elongated body arranged in the groove, but the present invention is not limited to this, and the rectangular cross section, the oval cross section, etc. It may be a deformed tube, or a long solid body such as a cable.

In addition, the gap between the lower surface of the holding member and the bottom surface of the groove does not necessarily need to extend over the entire width of the groove, and even if a large load is applied to the holding member from above, the long body is affected by the gap. In order to prevent the pressure from directly reaching, leg portions extending to the bottom surface of the groove may be protrudingly provided in some places on the lower surface of the pressing member.

<Effect of the Invention> The fixing structure for the pipe or the like arranged in the groove according to the present invention has the structure as described above, and since there is a gap between the lower surface of the pressing member and the groove bottom surface, Since the cleat does not act as a weir for the invading water and the inflowing water can easily flow out through the gap, the water pool in the groove can be eliminated and the drainage can be smoothly performed. Further, the cable protection tube, for example, the corrugated plastic tube can be prevented from being bent and levitated, and its linearity can be well maintained, and the cable can be smoothly drawn. Also, the cable protection tube can be pressed and fixed simply by fitting the pressing member into the groove, unlike the conventional example, without fixing anchor bolts before installing the cable protection tube or disposing the cable receiving member. Moreover, since it is not necessary to operate a tool in the narrow cable storage groove, the work of fixing the cable protection tube or the like can be easily performed. Furthermore, extension of cable protection tube,
Exchange or the like can be easily performed.

[Brief description of drawings]

1A is a plan view showing an embodiment of the present invention, FIG. 1B is a sectional view taken along line bb in FIG. 1A, FIG. 2, FIG. 3, FIG.
FIG. 5, FIG. 6, FIG. 6 and FIG. 7 are explanatory views showing another example of the pressing member used in the present invention, and FIG. 8A.
Is a plan view showing a conventional example, and FIG. 8B is b in FIG. 8A.
FIG. 1 ... Groove, 2 ... Protective tube, 3 ... Presser member, 31 ... Presser groove.

Claims (1)

[Scope of utility model registration request] 1. A long body is laid on the bottom surface of the groove, and a holding member having a holding groove of the long body is fitted into the groove, and a space between the lower surface of the holding member and the bottom surface of the groove. A fixed structure for an elongated body disposed in a groove, characterized in that the fixed body is separated by a gap.