JPH04331401A - Current collector - Google Patents

Abstract

PURPOSE:To prevent fire or fusion of current collector and feeder rail even upon short circuit of cables between adjacent current collectors by arranging a fuse dismountably between the currant collector and the cable. CONSTITUTION:A fuse is inserted between a current collector 6 and a cable 8 in a resin holder 7 of the current collector 6. When a current higher than a rated level flows from the current collector 6 to the cable 8, the fuse 21 is blown out to isolate the current collector 6 and the cable 8 automatically thus blocking overcurrent flow to the power supply circuit connected with the cable 8. When the fuse 21 is replaced, the cap nut 18 of a cap 16 is released to remove the cap 16 and then the fuse 21 in a fuse insertion hole 15 is replaced.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] The present invention relates to a current collector equipped with a current collector that is attached to a transport train running along a guide rail and comes into sliding contact with a power supply rail laid along the guide rail. It is.

0002

[Prior Art and Problems Therewith] A plurality of current collectors of this type are arranged in parallel corresponding to a plurality of power supply rails, as described in, for example, Japanese Patent Laid-Open No. 62-277001. In general, a breaker on the power circuit side to which the cable from each current collector is connected is configured to protect the circuit from overcurrent, and each current collector has an No protection measures were taken against electrical current.

[0003] Therefore, if a short circuit occurs between the cables of adjacent current collectors due to breakage of the cable sheathing, etc., the overcurrent flowing between the current collectors may damage the cable sheathing and the resin holder that holds the current collectors. This can lead to high temperatures, leading to fire accidents, or accidents such as welding of the current collector and power supply rail.

0004

[Means for Solving the Problems] In order to solve the above-mentioned conventional problems, the present invention provides a resin holder that holds a current collector that is in sliding contact with a power supply rail, and a fuse that is removably housed inside the resin holder. The present invention proposes a current collector in which the current collector and a cable are connected through a cable.

[0005]

[Embodiment] An embodiment of the present invention will be described below based on the attached illustrative drawings. In FIGS. 1 and 2, 1 is a power supply rail laid along the guide rail of a transportation train. It consists of a band-shaped power supply plate 2 and a resin holder 3, and is configured such that the surface of the power supply plate 2 is exposed within a groove-shaped opening 4 of the resin holder 3. Reference numeral 5 denotes a current collector, which includes a current collector 6 that fits into the groove-shaped opening 4 of the resin holder 3 in the power supply rail 1 and comes into sliding contact with the surface of the power supply plate 2; Resin holder 7 that holds the base of 6
A cable 8 connected to the current collector 6 is attached.

The current collector 5 is attached to a frame 9 of a transport train via support means 10. This support means 10 has a support shaft 1 in a direction perpendicular to the power supply rail 1.
A rotary support member 12 is rotatably attached to the frame 9 by a rotary support member 12, and a protrusion 7a of the resin holder 7 of the current collector 5 is connected to the rotary support member 12, and the current collector 5 is connected to the protrusion 7a of the resin holder 7 of the current collector 5 parallel double links 13a, 13b that support the power supply rail 1 so as to be movable in the distance direction, and the rotation support member 12 and the link 13a that bias the current collector 5 toward the power supply rail 1. It is composed of a spring 14 interposed therebetween.

[0007] The present invention provides a current collector 5 as described above, for example.
In this case, a fuse for connecting the current collector 6 and the cable 8 is removably housed in the resin holder 7, and its specific structure will be explained based on FIG. 3.
15 is a fuse insertion hole provided in the resin holder 7, and the rear end surface 6a of the current collector 6 is exposed at the inner end opening;
The outer end opening is closed by a cap 16. The cap 16 consists of a cap body 17 to which the end of the cable 8 is fixed, and a cap nut 18 that fits into the flange 17a of the cap body 17. It is screwed into the externally threaded circumferential surface 19a of the cylindrical protrusion 19 of the resin holder 7 to be formed. Further, the cable 8 is provided inside the cap body 17.
Terminal 2 using a coil spring to which the core wire 8a of
0 is fixed.

Prior to use, the fuse insertion hole 15 is
A fuse 21 rated at
By screwing into the cap 9a, the fuse insertion hole 15 is closed with the cap 16. As a result, the fuse 21
The outer end pole portion 21a of the cap body 17 is connected to the inner terminal (
The inner end pole part 21b of the fuse 21 presses against the rear end surface 6a of the current collector 6, and the outer end pole part 21b of the fuse 21 presses against the terminal (coil spring) 20. It is electrically connected to the cable 8 through the cable 8. In other words, the current collector 6
is connected to cable 8 via fuse 21.

When a current higher than the rated current flows from the current collector 6 to the cable 8, the fuse 21 blows and automatically disconnects the current collector 6 and the cable 8. Prevent current from flowing. When replacing a blown fuse 21, loosen the cap nut 18 of the cap 16, remove the cap 16, replace the fuse 21 in the fuse insertion hole 15, and then attach the cap 16 as described above and replace the cable 8. All you have to do is connect the .

0010

As described above, according to the current collector of the present invention, the removable fuse is interposed between the current collector and the cable, so that there is no interference between the cables of adjacent current collectors. Even if a short-circuit accident occurs, the current flowing from the current collector to the cable at that time exceeds the rating, causing the fuse to melt and disconnect the current collector from the cable. This improves safety by preventing accidents such as the current heating the cable sheath and the resin holder that holds the current collector, which can lead to a fire, or welding of the current collector and power supply rail. can be done.

[Brief explanation of drawings]

FIG. 1 is a partially longitudinal side view showing a current collector in use.

FIG. 2 is an enlarged cross-sectional view taken along line A-A in FIG. 1.

FIG. 3 is a longitudinal cross-sectional side view of main parts showing an embodiment of the present invention.

[Explanation of symbols]

1...Power supply rail, 2... Strip-shaped power supply plate, 3...Resin holder, 5... Current collector, 6... Current collector, 7...Resin holder, 8...Cable, 10... Current collector support means, 15...Fuse insertion hole, 16...Cap, 17...Cap body, 18...cap nut, 20...Terminal using coil spring, 21...Fuse.

Claims (2)

[Claims] 1. A current collector comprising a resin holder that holds a current collector that is in sliding contact with a power supply rail, and a fuse is removably installed inside the resin holder, and the current collector and a cable are connected through the fuse. 2. The resin holder is provided with a fuse insertion hole, and the resin holder is configured such that one end pole of the fuse inserted into the fuse insertion hole comes into contact with the current collector, and the open end of the fuse insertion hole is closed. 2. A terminal according to claim 1, further comprising a terminal that abuts the other end of the fuse in the fuse insertion hole on the inside of a removable cap, and the terminal is connected to a cable whose one end is connected to the cap. current collector.