JPH0323761Y2 - - Google Patents

Description

[Detailed explanation of the idea] (Industrial application field) The present invention relates to a current collector for a trolley line.

(Prior art and problems) This type of current collector is installed in a vehicle that runs on the ceiling in a factory, such as a mobile hoist, while a trolley track is installed in parallel with the rail for suspending the vehicle. The current collector is configured to supply power to the vehicle from the trolley line. In general, a current collector includes a current collecting shoe that contacts the trolley line, a link structure that supports the current collecting shoe, and a spring that urges the link structure toward the trolley line. As the spring, it is appropriate to use a compression spring that can maintain its spring characteristics stably despite severe vibrations of the shoe and link structure.
That is, since hooks and the like are used in tension springs, concentration of stress is unavoidable, and early fatigue occurs under the above-mentioned vibrations.

In addition, when a compression spring is installed, for example, referring to FIG. A structure in which the spring 1 is housed in the case 2 is considered to be optimal. However, if dust, water, etc. enter the case 2, it may interfere with the compression of the compression spring 2, slow its operation, or cause it to rust prematurely. This becomes a major cause of a decrease in current collection efficiency.

(Purpose of the invention) The invention is designed to quickly discharge dust, water, etc. from the spring guide case that houses the compression spring.
The purpose is to maintain the compression spring in good condition at all times and prevent a decrease in current collection efficiency.

(Structure of the invention) In order to achieve the above object, the present invention is a current collector for a trolley line having a compression spring 1 and a spring guide case 2, wherein the compression spring 1 has a current collection shoe 30 at its tip. The spring guide case 2 accommodates the compression spring 1 and has a dust exhaust hole 38 formed on the bottom or side surface. There is.

(Example) In FIG. 1 showing a plan view, a mounting base 5 is fixed to a vehicle 3 via an insulator 4.
The bearing frame 6 has a pair of shoe support first ones.
The arm 7 and a pair of second arms 8 for shoe support are rotatably supported. As shown in FIG. 2, the first arm 7 is supported by a fulcrum shaft 9 fixed to the frame 6 via a collar 10, a sintered metal bearing 11, and a shaft tube 12.
is fixed to the fulcrum shaft 9 via a washer 13, and the bearing 12 is fixed to the arm 7. The front end of the second arm 8 also has a support structure similar to that of the first arm 7, and is supported by the frame 6 via a fulcrum shaft 16, a shaft tube 17, and the like.

As shown in FIG. 1, the rear ends of both arms 7, 8 are rotatably connected by a connecting plate 22 via vertical shafts 20, 21, etc. The above vertical axes 20, 21
The distance between them is equal to the distance between the fulcrum shafts 9 and 16, and the shafts 9 and 2 at both ends of the first arm 7
0 is the axis 1 at both ends of the second arm 8.
It is equal to the distance between 6 and 21. That is, both arms 7 and 8
are always parallel to each other regardless of rotation around the fulcrum shafts 9 and 16, so that the connecting plate 22 always maintains the same attitude (inclination).

A shoe rotation arm 24 is provided at the center of the connecting plate 22.
is rotatably supported via a vertical shaft 25 and the like, and a pair of current collecting shoes 30 are fixed to the rotating arm 24 via a shoe connecting plate 27 and a shoe receiver 28 .

A compression spring 1, a spring guide case 2, an inner rod 31, etc. are provided to urge the current collector shoe 30 toward the trolley line T side. The front end of the inner rod 31 is rotatably supported by the bearing frame 6 via a vertical shaft 32, and extends rearward. A spring compression amount adjusting nut 33 is screwed into the rear end portion of the inner rod 31, and an annular spring presser 34 is locked and held by the nut 33.

The spring guide case 2 is formed into a bottomed cylindrical shape with an open rear end, and a rod insertion hole 35 is formed in the front end wall 2a, and the hole 35 fits into the inner rod 31 so as to be slidable in the axial direction. are doing. The latter half of the spring guide case 2 is rotatably connected to the middle part of the first arm 7 via a vertical shaft 36.

The compression spring 1 is a pair of large and small coil springs 1a and 1b.
It is fitted onto the outer periphery of the inner rod 31 and accommodates most of the inside of the spring guide case 2, with the case front end wall 2a and the spring retainer 34
compressed between. That is, the restoring force of the compression spring 1 urges the first and second arms 7, 8 in the direction of arrow A, and the current collection shoe 30 is brought into contact with the trolley line T.

In FIG. 2, the dust exhaust hole 38, which is the main part of the present invention, is formed on the lower surface of the spring guide case 2 or on the side surface near the lower surface (the one shown is the lower surface), and the dust evacuation hole 38 is formed on the lower surface of the spring guide case 2 or on the side surface near the lower surface (the one shown is the lower surface). The dust and water can be quickly discharged. The dust exhaust hole 38 is formed in a circular shape with a large area as shown in FIG. 3 so that the compression spring 1 inside the spring guide case 2 can be seen sufficiently from the outside. That is, it also serves as a window hole for inspecting the compression spring. In addition, on the top surface of the spring guide case 2 shown in FIG.
is formed. Large area dust exhaust hole 38
By forming the window hole 39, it is also possible to reduce the weight of the spring guide case 2.

In FIG. 1, 41 and 42 are lead wires, and the power supplied from the trolley line T to the current collecting shoe 30 is transmitted through the shoe connecting plate 27, the shoe rotating arm 24, the lead wire 41, and the second arm 8. , is supplied to the pull-out cable 43 of the vehicle 3 via the lead wire 42 and the mounting base 5.

As in the illustrated embodiment, four axes 9, 16, 2
If both arms 7 and 8 are arranged in parallel so that 1 and 20 are the vertices of a parallelogram, even if both arms 7 and 8 rotate in response to changes in the deflection of the trolley line T, The connecting plate 22 maintains the same attitude (inclination), so that the current collector shoe is not subjected to any rotational moment about the shaft 29, thereby avoiding the disadvantage of being exposed to a disconnection state more than necessary.

The illustrated embodiment is an example in which the arms 7 and 8 are adapted to rotate in the horizontal direction about vertically oriented fulcrum shafts 9 and 10. Arm is horizontal axis (horizontal axis)
It can also be used in current collectors that rotate vertically using the fulcrum as a fulcrum.

(Effect of the invention) As explained above, the present invention has a compression spring 1,
This is a current collector for a trolley line having a spring guide case 2. The spring guide case 2 houses the compression spring 1, and a hole 38 for dust removal is formed on the bottom or side surface of the spring guide case 2. Dust, water, etc. that enter the spring guide case 2 can be quickly discharged to the outside. That is, it is possible to prevent malfunction of the compression spring 1 due to dust accumulation and early rusting due to water retention, thereby preventing a decrease in current collection efficiency.

Due to the restoring elastic force of the compression spring 1, the current collection shoe 3
Since the arms 7 and 8 for supporting the shoe, which have a spring width of 0, are rotated and biased toward the trolley track side, stress concentration due to the use of hooks, etc. can be avoided compared to the case of using a tension spring, and the spring characteristics can be maintained for a long time. Stabilization can be achieved.

Further, since the compression spring 1 is housed in the spring guide case 2 and the expansion and contraction movement of the compression spring 1 is guided by the spring guide case 2, the expansion and contraction movement of the compression spring 1 is smooth.

[Brief explanation of drawings]

FIG. 1 is a partially sectional plan view of the current collector according to the present invention, FIG. 2 is a partially sectional view of FIG. . DESCRIPTION OF SYMBOLS 1...Compression spring, 2...Spring guide case, 3...Vehicle, 7, 8...Shoe support arm, 30...Current collector shoe, 38...Dust exhaust hole.

Claims (1)

[Claims for Utility Model Registration] A current collector for a trolley line having a compression spring 1 and a spring guide case 2, wherein the compression spring 1 includes a shoe support arm 7 having a current collection shoe 30 at its tip; The spring guide case 2 accommodates the compression spring 1 and has a hole 38 for dust removal formed on the bottom or side surface of the trolley line. Current collector.