JPH0614444A - Locking device of power cable connection section - Google Patents

Abstract

PURPOSE:To prevent a connection fault between each of power cables and an equipment side by fixing a power cable connection section to a movable plate 21 with a connection section anchor and, at the same time, and holding the movable plate on a floor with a movable holder in a movable manner. CONSTITUTION:A power cable connection section 30 is fixed to a movable plate 21 with a locking band 26, and the movable plate 21 is held on a floor 21A with a movable holder 22 in a slidable manner. When tensile force is applied to power cables U, V, W and N, the movable plate 21 is slid on the floor 32A. According to the constitution, a connection fault between each of the power cables U, V, W and N of the power cable connection section 30 and an equipment side can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixing device for movably holding a power cable connecting portion for electrically connecting terminals of a plurality of power cables arranged in parallel on a floor surface.

[0002]

2. Description of the Related Art FIG. 2 is a schematic diagram of a linear motor car system. In FIG. 2, reference numeral 31 indicates a linear motor car. The linear motor car 1 is arranged on the track 33 of the guideway 32. A propulsion coil 35 is attached to the side wall 34 of the guideway 32. As shown in FIG. 3, the propulsion coil 35 is divided into sections 36A, 36B ... That is, each of the section portions 36A, 36B, ... Is formed by combining, for example, three-phase propulsion coils. The three-phase propulsion coil 35 of each of the section portions 36A and 36B is connected to the power cable connecting portions 37A, 37B for neutral point connection, respectively.
Is connected to the neutral point power cable 39 via the power cable 38. These power cable connections 3
7A and 37B, as shown in FIG.
It is arranged at a position intersecting with A and 36B.

In the linear motor car system having the above structure, when the propulsion coils of the sections 36A and 36B are sequentially energized, an electromagnetic force acts on an electromagnet (not shown) of the linear motor car 31, so that the linear motor car 31 floats. , Run. By the way, the power cable connecting portions 37A, 37B, etc. are arranged on the side groove (floor surface) 32A of the track 33 in the guideway 32, as shown in FIG. It is fixed on this floor surface 32A in order to prevent movement due to the action of electromagnetic force.

[0004]

However, since the propulsion coil 35 forming each of the section portions 36A, 36B, etc. repeats thermal expansion and contraction, the interval between the section portions 36A, 36B fluctuates within a width of 100 mm, for example. Resulting in. Therefore, as described above, the power cable connecting portions 37A, 37B
If the above-mentioned components are simply fixed to the floor surface 32A at a fixed position, tension may be applied to the power cables 38 and 39 due to variation in the interval of the section 36A and the like, which may result in connection failure. The present invention has been made to solve such a point, and an object thereof is to provide a fixing device capable of movably holding a power cable connecting portion on a floor surface.

[0005]

The fixing device of the present invention comprises a moving plate on which a power cable connecting portion is mounted, a connecting portion fixing device for fixing the power cable connecting portion to the moving plate, and a moving plate on the floor. And a movable holder for movably holding the surface.

[0006]

When the tension is applied to the power cable connected to the power cable connecting portion, the moving plate moves while being held on the floor surface by the moving holder. Therefore, it is possible to prevent connection failure between the electric power cables on the electric power cable connecting portion side and the electric device side.

[0007]

Embodiments of the present invention will now be described in detail with reference to the drawings. 4 (A) and 4 (B) are a front view and a side view in which a power cable connection portion of a linear motor car system fixed by a fixing device according to the present invention is partially broken, and FIG. FIGS. 6A to 6C are a cross-sectional view, a side view, and a plan view before connecting the power cable of the power cable connecting portion. In these figures, 1 indicates an insulating body. The insulating main body 1 is made of ethylene / propylene rubber and has an internal semiconductive portion 2 as a shielding portion buried in the center thereof. The inner semiconductive portion 2 is made of a semiconductive rubber material, and four conductor insertion holes 2a are provided in parallel at equal intervals. A connecting copper plate 3 is embedded in the inner semiconductive portion 2. The connecting copper plate 3 is embedded so as to close each conductor insertion hole 2a at one end side.
A through hole 3a for inserting a terminal is provided coaxially with a.

A core insertion hole 1a coaxially communicating with each conductor insertion hole 2a is provided on one end side of the insulating main body 1, and a projecting portion 1b having a tapered diameter is integrally formed. The stress cone portion 4 is integrally formed on the protrusions 1b. These stress cones 4
Is made of a semiconductive rubber material. An outer semiconductive coating 5 is integrally formed on the peripheral surface of the insulating body 1. The outer semiconductive coating 5 is made of the same material as the stress cone portion 4 and is formed integrally with the stress cone portion 4.

On the other end side of the insulating main body 1, each conductor insertion hole 2a is formed.
There is provided a tapered fitting hole 1c which is coaxially communicated with. The insulating plug 6 shown in FIG. 1 is inserted into these fitting holes 1c while rotating. Each insulating plug 6 is formed in a conical shape, and a fixing fitting 7 is embedded in the central portion on the small diameter side. The fixing metal fitting 7 is formed with a screw hole. In addition, a square-shaped square hole 6a is formed on the end surface on the large diameter side of the insulating plug 6.

FIG. 6 shows an example in which the above-mentioned power cable connecting portion 30 is used to supply power to the propulsion coil. A U-phase power cable U is connected in series to the propulsion coil 35. Other power cables V, W and N of V phase, W phase and N phase are connected in parallel to the power cable U.
The power cables V and W are respectively connected to other V and W phase propulsion coils (not shown), and the power cable N is used as a neutral wire. It should be noted that these propulsion coils form the section of FIG.

The above power cables U, V, W and N are
As shown in FIG. 4 (A), the sheath layer is removed at the end to expose the shielding layer 11 and the outer semiconductive layer 12, and the cable core including the insulating layer 13, the inner shielding layer, and the cable conductor 14 is formed. It is protruding (exposed). The compression terminal 8 is attached to the cable conductor 14, and the compression terminal 8
A small-diameter screw portion 8a is integrally formed on a tubular portion that is compressed and fixed on the cable conductor 14. Further, the insulating layer 13 (cable core) of each power cable is inserted into the core insertion hole 1a via the protruding portion 1b of the insulating body 1. At the time of this insertion, the cable conductor 14 is inserted and arranged in the conductor insertion hole 2a of the inner semiconductive portion 2, and the screw portion 8 of the compression terminal 8 is inserted.
a is inserted into the through hole 3a of the connecting copper plate 3.

A semiconductive tape 9 is wound between the outer semiconductive layer 12 of the cable and the tip of the stress cone portion 4, and on the sheath layer of the power cable and the stress cone portion 4 and the semiconductive tape 9. A heat-shrinkable protection tube 15 is attached to the above to cover them.

On the other hand, the insulating plug 6 is rotated and fitted into the fitting hole 1c of the insulating body 1. That is, a wrench (not shown) is inserted into the square hole 6a of the insulating plug 6, and the insulating plug 6 is fitted by applying a rotational force. Therefore, when the insulating plug 6 is fitted, the screw portion 8 of the compression terminal 8 is inserted into the screw hole of the fixing fitting 7.
Since a is screwed in, the compression terminal 8 can be fixed to the connecting copper plate 3. In addition, the power cable U,
Each of the V and W cable conductors 14 is electrically connected in parallel to the cable conductor 14 of the power cable N via the connecting copper plate 3.

1 (A) to 1 (C) are a front view, a plan view and a side view of the fixing device 20 according to the present invention. In FIG. 1, reference numeral 21 denotes a moving plate. The moving plate 21 is formed of an insulating material such as a plastic material into a rectangular thin plate structure, and is placed on the floor surface 32A (see FIG. 2). A moving holder 22 is locked to the upper surface of the center of the moving plate 21 along the width direction thereof. This moving holder 22
Is made of a metal plate with a small width, and both ends are fixed bolts 2
It is fixed to the floor surface 32A by 3, 23. In this fixed state, the moving holder 22 is held on the upper surface of the moving plate 21 in a non-pressed state. Therefore, the moving plate 21 can slide on the floor surface 32A along the longitudinal direction thereof.

Recesses 24 and 25 are provided on the lower surfaces of both ends of the moving plate 21 along the width direction thereof. The connecting portion fixing band 26 is passed through one of the concave portions 24, and the other concave portion 2
A cable fixing band 27 is passed through 5. Joints 26a and 27b composed of bent portions are formed at both ends of these fixing bands 26 and 27, and screw portions of bolts 28 penetrate the joints.

In the fixing device 20 having the above structure, the above-mentioned power cable connecting portion 30 is provided on the moving plate 21.
Is placed. In this mounted state, since the semiconductive rubber spacer 16 is adhered to the peripheral surface of the connecting portion 30, the rubber spacer 16 directly contacts the moving plate 21. Further, since the power cables U, V, W and N are respectively inserted through the other semi-conductive rubber spacers 16, they are supported on the moving plate 21 by the rubber spacers 16.

With the power cable connecting portion 30 placed in this manner, the connecting portion fixing band 26 is wound around the connecting portion 30 via the rubber spacer 16, and the connecting portion 30 is inserted via the bolt 28 and the nut 29. Are tightened and fixed. The cable fixing band 27 is wound around each power cable via the rubber spacer 17, and these cables are tightened and fixed via bolts 28 and nuts 29. Therefore, the linear motor car 31
Even when the wind pressure during traveling (see FIG. 2) or the electromagnetic force from the propulsion coil 35 acts on the power cable connecting portion 30, the connecting portion 30 is fixed on the moving plate 21 by the fixing bands 26 and 27. So never move.

On the other hand, due to thermal expansion and contraction of the propulsion coil 35 (see FIG. 2) and the like, the interval between the sections fluctuates and the power cable U,
When tension is applied to V, W, and N, the moving plate 21 slides on the floor surface 32A in the longitudinal direction (axial direction of the cable) while being held by the moving holder 22. Therefore, a large tension is not applied to the power cables U, V, W, and N, so that a poor connection between the power cables and the propulsion coil side can be prevented. Further, the width dimension of the moving plate 21 is set smaller than that of the connecting portion 30, and the moving plate 21 is
Since it is directly slid (moved) on the floor surface 32A, it can be installed even on the floor surface 32A (see FIG. 2) of the side groove having a small space.

Further, since the moving plate 21 is slid, the connecting portion 30 is not damaged, and the wear resistance of the moving plate 21 is excellent because it is made of a plastic material.
Further, since the rubber spacer 16 of the connecting portion 30 has a shielding function as a semiconductive layer, it is necessary to keep it in an insulating state against the ground, but in the above-mentioned embodiment, it is placed on the moving plate 21 made of an insulating material. Since they are in contact with each other, there is no need to perform special ground insulation treatment.

Although the fixing device of the present invention is applied to the power cable connecting portion 30 for connecting the neutral point of the linear motor car system in the above-mentioned embodiment, it is not necessary to move the power cable connecting portion other than the power cable connecting portion. Of course, it can also be used for fixing. Further, the connecting portion 30 may be fixed to the moving plate 21 by using other fixing means instead of the connecting portion fixing bands 26 and 27, or the connecting portion 30 may be fixed only by using the connecting portion fixing band 26. May be.

[0021]

As described above, according to the present invention,
Since the power cable connection part is fixed to the moving plate by the connecting part fixing tool, and this moving plate is movably held on the floor surface by the moving holding tool, the electric power can be changed according to the tension applied to the power cable. The cable connection can be moved. Therefore, it is possible to provide the fixing device for the power cable connecting portion, which can prevent the occurrence of the connection failure between the power cables and the device side.

[Brief description of drawings]

FIG. 1A is a front view of a fixing device according to the present invention,
(B) is the same top view, (C) is the same side view.

FIG. 2 is a diagram schematically showing a linear motor car system.

FIG. 3 is a schematic diagram of a neutral point connection configuration of the system.

FIG. 4A is a partially cutaway front view of a power cable connecting portion, and FIG. 4B is a side view of the same.

5A is a cross-sectional view of the connection portion of FIG. 4, FIG. 5B is a side view of the same, and FIG. 5C is a plan view of the same.

FIG. 6 is a front view showing an example in which the connecting portion of FIG. 4 is connected to a propulsion coil.

[Explanation of symbols]

 16, 17 Rubber spacer 20 Fixing device 21 Moving plate 22 Moving holder 24, 25 Recessed portion 26 Connection fixing band 27 Cable fixing band 30 Power cable connection portion 35 Propulsion coil 36A, 37B Section portion

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Junhito Uchiyama 4-3 Kudankita, Chiyoda-ku, Tokyo Tokai Passenger Railway Co., Ltd. Company Toshiba Fuchu factory (72) Inventor ▲ Takahashi Yoshikatsu 2-1-1, Oda Sakae, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture Showa Cable Denki Co., Ltd.

Claims (1)

[Claims] 1. A fixed device of a power cable connecting portion for electrically connecting terminals of a plurality of power cables arranged in parallel, the moving plate having the power cable connecting portion mounted thereon, A fixing device for a power cable connecting part, comprising: a connecting part fixing device for fixing the power cable connecting part to a moving plate; and a moving holding device for movably holding the moving plate on a floor surface.