JPS5945262A - Car retarder - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a car retarder that automatically brakes vehicles running on a sorting rail in a freight car yard, and particularly relates to a car retarder that uses a rotating body having spiral wheel treads on the outer periphery. .

This type of car retarder has a rotating body installed inside the running rail of a vehicle, which has a spiral protrusion on its outer periphery parallel to the rail, and when the vehicle rolls on the running rail, the wheel The vehicle travels by rotating the rotating body while stepping down on the protrusion of the rotating body using the 7 flange portion, and at this time, applies some kind of rotational resistance to the rotating body to apply braking to the vehicle.

In such a car retarder, when a vehicle approaches from a direction opposite to the vehicle approach direction in which braking force is applied during braking, the protrusion of the rotating body has a reverse spiral shape with respect to the direction of approach. As a result, the wheels end up riding on the rotating body.

For this reason, conventionally, when a vehicle approaches from the opposite direction, the rotating body is moved away from the rail. Therefore, in conventional car retarders, a rotating body rocking device to move the rotating body closer to or away from the rail and an associated signal transmission/reception device are essential, making the entire device complex and expensive. It had become a thing.

The present invention has been made in view of the above circumstances, and a protrusion is formed on the back surface of the wheel tread on the outer periphery of the rotating body along this back surface, so that when the vehicle is driven from the opposite direction by 318 degrees, the wheel moves to the protrusion. To provide a car retarder which allows a vehicle to enter from either direction without rocking the rotating body by having a structure in which the rotating body is smoothly reversely rotated while in contact with the rotating body.

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 shows a car retarder according to the present invention. It should be noted that both ends of the rotating body are constructed in the same manner and are angled at F7°, so only the - side is shown in the figure.

In FIG. 1, parallel rails 1. A pair of rotating bodies 2, 2, which is a feature of the present invention, are arranged inside each of them along the IK. The rotating body 2.2 has spiral protrusions 2a, 2a provided on its outer periphery and is rotatably supported by bearings 3, 3.

Further, a crankshaft 4° 4 extends from the end of the rotating bodies 2, 2, and crank pin rods 6, 6 of the crankshaft 4, 4 extend.
are connected via a radial bearing 7.7. Passages 8.8 are connected to the cylinder chambers in the hydraulic cylinders 5, 5, and these passages 8.8 are connected to respective hydraulic cylinders at the other end (not shown) via flow control valves 9, 9. ing.

Next, to explain the rotating body in detail based on FIGS. 2 and 3, the rotating body 2 has a spiral protrusion 2 provided on its outer periphery.
A protrusion 10 is formed on the back surface along the back surface. The projecting portion 10 is formed so that its tip 10a can come into contact with the flange portion 11a of the wheel 11 when the vehicle enters from the opposite direction. Furthermore, the protruding portion 100 on the end side of the rotating body is a tapered portion 10b that slopes toward the protrusion back surface 1111 as it goes toward the end of the rotating body 2.

Next, the action will be explained.

When a vehicle approaches from the direction opposite to the braking direction of the car retarder (the direction of the arrow in FIG. 3), the 7-lung portion 11 of the wheel 11
a The above-mentioned 7 flange portion 1 is attached to the protrusion tip 10a that protrudes forward.
1a makes contact. Due to this contact, a knife acts on the rotating body 2 in the right direction in FIG.

Here, if the force is F, and the distance between the plane parallel to the force F that includes the contact point and the rotation center 0 of the rotating body 20 is a, then the contact causes the rotating body 2 to rotate about the rotation axis. A rotational moment of FXa is generated in the body 2, and the rotating body 2 rotates in the direction of the arrow in FIG. 2, that is, in the opposite direction to that during braking, as the vehicle advances. Therefore, even if a vehicle approaches from the opposite direction, the wheels 11 do not ride on the rotating body 2, and the vehicle can pass through the rotating body 2 as it is. 2 does not need to be moved away from rail 1. In order to make the rotation of the rotating body 2 smooth, it is recommended to make the protrusion shape such that the distance #a is as long as possible1.On the other hand, after the vehicle passes, the end side of the rotating body of the protrusion 10 becomes the third The tapered portion 10b extends over the length b shown in the figure, and the position of the protrusion 2a escapes to a position where it does not interfere with the approach of the vehicle from the braking direction.

When the vehicle enters from the braking direction, it enters smoothly by the taper portion 10b, passes through the portion Cf of the protrusion 10 where the taper portion 10b shown in FIG. 3 ends, and then the flank portion 11a. The flange portion 11a of the wheel 11 is stepped down on the surface of the protrusion 2a of the rotating body 2 located in front. As a result, the rotating body 2 rotates counterclockwise in FIG. 2 (in the direction opposite to the arrow) as the vehicle moves forward, and returns to the normal braking state without any operation.

As described above, according to the present invention, a protrusion is formed on the back surface of the wheel tread of the rotating body, and when a vehicle enters from the opposite direction, the rotating body is rotated in the opposite direction by contact between the wheel and the protrusion. There is no need to swing the rotating body according to the direction of approach of the vehicle, and there is no need to provide a conventional rotating body rocking device and a signal transmission/reception device associated with this rotating body rocking. Therefore, the entire car retarder device can be made smaller and the cost can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of essential parts showing one embodiment of the present invention, and FIGS. 2 and 3 are diagrams for explaining the operation of the same embodiment. 2...Rotating body 2a...Protrusion 1o...Protrusion part 10, a...Tip 10b...Tapered part 1
1...Wheel 11a...Flange portion Patent filed by: Nippon Signal Co., Ltd. Patent attorney: Shio Sasashima Hatake

Claims (1)

[Claims] It is provided along the vehicle running rail and has a spiral wheel tread on the outer periphery, and includes a rotating body that rotates as the wheel rotates while stepping down on this wheel tread, and provides resistance to the rotation of the rotating body. In a car retarder for braking a vehicle, a protrusion is formed along the back surface of the wheel tread surface so as to be able to come into contact with the wheel when the vehicle enters from a direction opposite to the vehicle entry direction in which braking force is applied. The shape of the protruding portion on the end of the rotating body is formed into a square shape that slopes toward the back surface of the wheel tread as it goes toward the end of the rotating body.
A car retarder characterized in that the rotating body is rotated in the opposite direction when the vehicle approaches from the opposite direction.