JPH0143937Y2 - - Google Patents

Description

[Detailed explanation of the invention] (a) Industrial application field This invention is applicable to, for example, contact wires used as moving power sources for transportation machines such as cranes and hoists.
In particular, it relates to contact wire connection structures using hollow conductors.

(b) Prior art Conventionally, contact wires were connected to each other using hollow conductors such as pipes, as shown in Fig. 1.
Insert the connecting bar 2 into 1', and then
Corresponding to the outer periphery of conductors 1 and 1', attach plate 3,
A method is adopted in which this plate and the bar 2 are tightened with bolts 4.

(c) Problems to be solved by the invention However, in the above connection, if the contact plate and the connection bar are not fastened loosely, the electrical resistance at the conductor contact surface will increase; on the other hand, if the two are tightly fastened, There is a drawback that thermal expansion and contraction of the hollow conductor becomes difficult. Furthermore, when a trolley wire is installed along a bridge, it cannot absorb the bending that occurs at the connection point of the trolley wire due to the flexure of the bridge, and there is a strong possibility that the wire will be damaged due to excessive stress.

In addition, in order to absorb heat shrinkage, it is necessary to provide a long hole 5 on one side of the pipe conductor to avoid contact with the bolt, which reduces the contact area between the conductor and the connecting member and increases the line length. , the voltage drop at the tip becomes large.

Furthermore, the elongated hole 5 cannot be made too large in order to ensure the contact area and mechanical strength of the conductor.
Inevitably, the allowable range for thermal expansion and contraction becomes narrower, and an expansion device must be installed at the end of the line.

(d) Means for solving the problems The purpose of this invention is to provide a connecting structure for contact wires that eliminates the above-mentioned drawbacks. Inside the conductor, place a connecting piece whose middle part has approximately the same diameter as the outside diameter of the conductor, so that it cannot slide relative to one conductor.
This is achieved by making the insertion tip thinner and slidably inserted into the other conductor, and further providing terminals on both hollow conductors near the connection part and connecting each terminal with a jumper wire. Ru.

(e) Embodiment An example of the connection structure of this invention will be described below with reference to the attached FIGS. 2 and 3.

The contact wires 10, 10' shown in the figure are insulated contact wires, and the outer periphery of the hollow conductor (pipe conductor is used in the figure) 11, 11' is the sliding surface 12, 12 in contact with the current collector. Insulating material 13,1 except for '
It is covered by 3'. This contact wire 10, 10'
is a predetermined gap G between the insulating materials 13 and 13',
On the other hand, the hollow conductors 11 and 11' abut against each other with a larger distance between them, and are mechanically connected via a connecting piece 14 attached to the conductors. That is, one end of the connecting piece 14 is tightly fitted into the hole of the conductor 11', the diameter of the other end is made very slightly smaller than the diameter of the hole of the conductor, and the tip side is The piece is made thinner so as to create a gap between the outer periphery and the conductor, and is slidably inserted into the conductor 11. This piece prevents the conductor from being bent or misaligned, and also prevents mechanical damage to the connection part. It adds a strong sense of purpose. Furthermore, since there is a gap between the conductor 11 and the outer periphery of the distal end of the piece 14 inserted therein, there is a degree of freedom in changing the connection angle between the conductor 11 and the piece 14, which reduces the bending stress applied to the connection part. Since the loss of power is reduced, there will be no damage to the trolley track even if it is installed on a bridge, etc. In addition, the connection piece 14
In order to eliminate poor contact of the current collector due to excessive insertion into one conductor and steps on the sliding surface, conductor 1 is
The intermediate portion 14a is located at a distance of gap G from 1'.
is made to have approximately the same diameter as the outer diameter of the hollow conductor.

Next, as described above, since the piece 14 is loosely inserted into one of the conductors, both trolleys 10 and 1
Electrical continuity between 0' becomes poor. Therefore, near the connection part of each hollow conductor, terminals 15 and 15' are provided standing up on the outer periphery of the conductor, and each terminal is connected with a flexible jumper wire 16, and one of the terminals is connected via the jumper wire. Current is conducted from one conductor to the other, and therefore, in this invention, it does not matter whether the connection between the pieces has good conductivity or not, and good electrical continuity between the conductors is always maintained. .

In the figure, 17 is a reinforcing cover for the connection portion attached to the insulating materials 13, 13', and 18, 18' are terminal covers.

(F) Effects According to this invention explained above, one end of the connecting piece can be slid onto one of the hollow conductors, and
Since the conductor is inserted with a narrow end, thermal expansion and contraction of the conductor is stably absorbed, and the range of expansion and contraction is not limited, so there is no need to install an expansion device.

Furthermore, electrical performance is stabilized by electrically connecting contact wires with each other via jumper wires.
Voltage drop is reduced.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a conventional contact wire connection part, FIG. 2 is a sectional view showing an example of the connection structure of this invention, and FIG. 3 is a sectional view taken along the line - FIG. 2. 10, 10'... Contact wire, 11, 11'... Hollow conductor, 13, 13'... Insulating material, 14... Connection piece,
15, 15'... terminal, 16... jumper wire, 17...
Reinforced cover.

Claims (1)

[Claims for Utility Model Registration] (1) Inside hollow conductors that are butted against each other with a predetermined gap, a connecting piece whose middle part has approximately the same diameter as the outside diameter of the conductor is slid against one conductor. If the other conductor is not possible, the insertion tip side should be made thinner, and the contact wires should be inserted so as to be able to slide in the axial direction to mechanically connect the contact wires to each other, and furthermore, terminals should be connected to both hollow conductors near the connection part. established,
A contact wire connection structure that uses hollow conductors to electrically connect contact wires to each other by connecting each terminal via a jumper wire. (2) The pipe conductor is a hollow conductor according to claim (1) of the utility model registration claim, characterized in that the outer periphery of the pipe conductor except for the contact surface (sliding surface) of the current collector is covered with an insulating material. Connection structure of the contact wire used. (3) A connection structure for a contact wire using a hollow conductor according to claim (2) of the utility model registration claim, characterized in that a reinforcing cover for the connection portion is provided on the outer periphery of the insulating material. (4) A contact wire connection structure using a hollow conductor as set forth in claim (1), (2), or (3) of the utility model registration claim, characterized in that the hollow conductor is a pipe. .