JPS628193Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Description of technical field This invention relates to a support device for a trolley wire for power supply.

(b) Description of the prior art and its problems Insulated trolley wires are often used as power supply wires for overhead traveling cranes and the like. In this case, the trolley wire is generally supported by a structure as shown in FIGS. 1 and 2.

That is, a conductor 1 is provided with an insulating sheath 3 with grooves 2.
An insulated trolley wire 4 covered with the wire is suspended by a support fitting 5, and is fixed and supported with bolts 6. In this case, the area occupied by the support fitting 5 is very large compared to the diameter of the trolley wire, as shown in the cross-sectional view of FIG. For this reason, when a trolley wire is installed alongside the traveling track 7 and its space factor is a problem, for example, when the trolley wire is installed inside a nuclear reactor containment vessel, the space factor is applied to the track and trolley wire. The space is small, and the current trolley wire support structure cannot meet that requirement.

(c) Purpose and outline of the invention The purpose of this invention is to improve the trolley wire support device, which has an inferior space factor, as described above.
To enable the use of an insulated trolley wire even in places where there is a restriction on the area for laying electric wires.

(d) Example of the invention An example of the invention will be explained based on the drawings.

3 and 6, four vertical feet 9 are integrally provided on a base 8 made of metal casting. The pitch of the four legs 9 is the sum of the outer diameter of the sheath 3 and the thickness of the legs 9. At the tip of the foot 9, two projections 10 that engage with the grooves 2 of the sheath 3 are provided symmetrically with respect to the center 11 of the foot. The dimensional relationship between the protrusion 10 and the foot 9 is as follows.

As shown in Fig. 9, the outer diameter of the trolley wire sheath 3 is W ₂ , the cross-sectional diameter of the groove 2 portion is W ₁ , and in Fig. 6, the distance between the protrusions 10, 10 is w ₁ , and the center between the legs is When w ₂ is the distance between the feet with respect to the center line B, which is inclined by θ degrees with respect to the line A, let w ₁ < W ₁ < w ₂ = W ₂ and use the value of (W ₁ − w ₁ ) as an interference. Set it to 0 or more.

With the above configuration, when supporting the trolley wire with this support, the support and the trolley wire are fitted at an angle of θ as shown in Figure 6, and if they are made perpendicular to each other, the sheath The groove engages with the protrusion, and at this time, the sheath is tightened according to the value of the interference (W ₁ −w ₁ ), and the support is fixed.

(e) Other embodiments As shown in Figures 7 and 8, a protrusion 1 attached to the foot 9
2 is provided at the same length as the width D of the base 8. In this case, the trolley wire is engaged with the support from the beginning.

In general, the material of the base 8 may be a polymer material.

(f) Effects of the invention By using the above-mentioned support, the trolley wires can be supported in a compact manner, so the space occupied by the trolley wires is small, and this is especially useful for automatic point detection trolley wires inside the reactor containment vessel. This is extremely advantageous when installing in a narrow space, such as in the case of

[Brief explanation of the drawing]

Figure 1 is a perspective view of a trolley wire with an insulating sheath, Figure 2 is a front sectional view showing conventional trolley wire installation,
FIG. 3 is a front sectional view of the trolley wire support according to the present invention (view from the arrow in FIG. 6), FIG. 4 is a front sectional view of the trolley wire installation using the present invention, and FIG.
Fig. 6 is a front view of the bottom view of Fig. 3;
FIG. 7 is a front view of still another embodiment of the present invention;
The figure is a bottom view of FIG. 7, and FIG. 9 is a sectional view of the trolley wire. 1...Trolley wire, 2...Snow groove, 3...
Insulating sheath, 8... Base, 9, 9a... Leg, 11
……protrusion.

Claims (1)

[Scope of utility model registration request] In a device that suspends and supports a plurality of trolley wires by covering each of the plurality of trolley wires with an insulating sheath and engaging protrusions in grooves provided on the left and right outer sides of the insulating sheath, A trolley wire support device, which is provided with a pair of legs having protrusions that engage with the groove at positions sandwiched therebetween and shifted back and forth in the length direction of the trolley wire in accordance with the number of trolley wires.