JPH06189407A - Current collector for trolley - Google Patents

Abstract

PURPOSE:To prevent a decrease in current collecting characteristics at a step difference of rail conductors. CONSTITUTION:A shaft 6 of an arm is pivotally inserted to a center of a current collector 4, a center of the collector 4 is pressed by the shaft 6 to a rail conductor 3 via a current collecting arm 5, and the collector 4 is longitudinally moved while a slide 4a of the collector 4 remains in contact without separating from the conductor 3. A shape of the collector 4 is so formed with additional parts 4b, 4c which are not provided in prior art as to be symmetrical in relation to a longitudinal direction of the moving direction to increase an inertial moment with respect to the shaft 6 of the arm of the collector 4. The parts 4b, 4c are so formed in shape as to be increased toward a longitudinally separating direction from the shaft 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a trolley current collector used in a trolley system for supplying power and transmitting signals to mobile loads such as hoists and surveillance cameras in factories.

[0002]

2. Description of the Related Art A conventional trolley current collector will be described with reference to the drawings. FIG. 4 is a configuration diagram of essential parts of a conventional trolley current collector. In FIG. 4, 1 is a current collector, 2 is a rail, 3
Is a track conductor, 14 is a current collecting arm, 15 is a spring, 16 is a lead wire, and 7 is a sliding part of the current collector 1.

A conventional trolley current collector has a current collecting arm 1
The current collector 1 is attached to 4 and the sliding portion 7 of the current collector 1 is brought into contact with the track conductor 3 provided on the rail 2 so that the current collector 1 can be moved along the track conductor 3. Here, in order to prevent the current collector 1 from separating from the orbital conductor 3,
A spring 15 is attached to the current collecting arm 14 to press the central portion of the current collector 1 against the track conductor 3. In addition, when the rail 2 is a curved part, the rail 2 is connected by the joiner 9 as shown in FIG.

[0004]

However, when the rail 2 is a curved portion, a step occurs due to the seam of the rail 2 and the external environment. For example, as shown in FIG. 6, when the track conductor 3 has a step, it collides with the step (FIG. 6 (a)).
The collected current collector 1 jumps and departs from the wire (FIG. 6 (b)), and there is a problem that the current collecting characteristic is deteriorated.

An object of the present invention is to provide a trolley current collector capable of preventing the deterioration of current collecting characteristics at the step of the track conductor.

[0006]

SUMMARY OF THE INVENTION A trolley current collector of the present invention includes a track conductor and an arm shaft rotatably inserted through a central portion of the track conductor so that the track conductor is pressed by the shaft of the arm and comes into contact with the track conductor. It has a current collector that moves back and forth, and is characterized in that the moment of inertia about the axis of the arm of the current collector is increased.

[0007]

According to the configuration of the present invention, when the current collector moves, there is a step in the orbital conductor, and even if the current collector jumps and the front portion in the moving direction of the current collector separates from the orbital conductor, Since the moment of inertia about the arm axis is increased,
A large rotational force acts on the rear portion in the moving direction of the current collector, the rear portion in the moving direction of the current collector does not separate from the track conductor, and it is possible to prevent deterioration of current collecting characteristics at the step of the track conductor.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a configuration diagram of a main part of a trolley current collector according to an embodiment of the present invention. In FIG. 1, 2 is a rail, 3 is a track conductor, 4 is a current collector, 4a is a sliding part of the current collector 4, 4b, 4
c is an additional portion of the current collector 4, 5 is a current collecting arm, and 6 is an axis of the arm.

In this trolley current collector, an arm shaft 6 is rotatably inserted in the central portion of the current collector 4, and a central portion of the current collector 4 is connected to the arm shaft 6 via a current collecting arm 5 by means not shown. Part is pressed against the track conductor 3 and the sliding part 4a of the current collector 4 is pressed.
The current collector 4 is moved back and forth while being kept in contact with the track conductor 3 so as not to separate from the track conductor 3. The feature of this trolley current collector is that the moment of inertia about the axis 6 of the arm of the current collector 4 is increased. Therefore, the shape of the current collector 4 is provided with additional portions 4b and 4c which were not available in the past. The shape is symmetrical with respect to the moving direction. The additional portions 4b and 4c are shaped so as to become larger as they move away from the arm shaft 6 in the front-rear direction.

As described above, according to this embodiment, as shown in FIG. 2, when the current collector 4 moves in the direction A, the track conductor 3 has a step, and the current collector 4 jumps and the current collector 4 is jumped. Even if the front part of the moving direction of is separated from the track conductor 3, the moment of inertia of the current collector 4 with respect to the axis 6 of the arm is increased.
A large rotational force acts on the rear portion of the current collector 4 in the moving direction, and the rear portion of the current collector 4 in the moving direction does not separate from the track conductor 3, and it is possible to prevent deterioration of the current collecting characteristics at the step of the track conductor 3. . Needless to say, the same can be said when the moving direction of the current collector 4 is opposite to the A direction.

As another embodiment, a current collector having a large moment of inertia about the axis 6 of the arm is shown in FIG.
The current collector 4'may have a shape as shown in FIG.

[0012]

According to the trolley current collector of the present invention, when the current collector moves, there is a step in the track conductor, and the current collector jumps and the front portion in the moving direction of the current collector separates from the track conductor.
Since the moment of inertia about the axis of the current collector arm is increased, a large rotational force acts on the rear part in the direction of movement of the current collector, and the rear part in the direction of movement of the current collector does not separate from the track conductor. It is possible to prevent the deterioration of the current collecting characteristics of.

[Brief description of drawings]

FIG. 1 is a configuration diagram of essential parts of a trolley current collector according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram of an operation in the embodiment.

FIG. 3 is a configuration diagram of a current collector according to another embodiment of the present invention.

FIG. 4 is a configuration diagram of a main part of a conventional trolley current collector.

FIG. 5 is a perspective view showing a rail connecting portion of the trolley current collector.

FIG. 6 is a diagram for explaining a conventional problem.

[Explanation of symbols]

 3 Orbital conductor 4,4 'Current collector 4b, 4c Additional part of current collector 6 Arm axis

Claims (1)

[Claims] 1. A track conductor, and a current collector which is rotatably inserted through a central portion of the arm and is pressed by the track conductor by the axis of the arm to come into contact with the track conductor and move back and forth. A trolley current collector, wherein the moment of inertia of the current collector with respect to the axis of the arm is increased.