GB2043007A

GB2043007A - Rail car parking stop

Info

Publication number: GB2043007A
Application number: GB7907972A
Authority: GB
Original assignee: Dale Mansfield Ltd
Current assignee: Dale Mansfield Ltd
Priority date: 1979-03-07
Filing date: 1979-03-07
Publication date: 1980-10-01

Abstract

The stop comprises a chock member 24 pivotally mounted on mounting means 10 which are provided with fixing means 16, 18 such that they can be removably fixed to a rail 20 on which the rail car runs. The parking stop can be swung into or out of the path of the rail car. <IMAGE>

Description

SPECIFICATION Rail car parking stop The present invention relates to a rail car parking stop.

According to the present invention there is provided a rail car parking stop comprising a chock member for engagement with a wheel of a rail car and mounting means for the chock adapted for rigid fitment to a rail, the chock being movable with respect to said mounting means.

The chock may be provided with inclined arcuate faces on each of its sides, the radius of curvature of the arc corresponding to the radius of the tread of a rail car wheel.

Preferably the mounting means are adapted for clamping to the flange of a rail and the chock is pivotally mounted thereon such that it can swing into position over the rail into the path of travel of a rail car wheel or out of position away from the rail to allow passage of the rail car thereby.

Means may be provided for locking the chock in its position above the rail and to facilitate movement of the chock from its in use to its out of use position a handle may be prdvided.

An embodiment of the present invention will now be described by way of example only with reference to the accompanying drawings in which: Fig. 1 is an elevation of a rail car parking stop; Fig. 2 is an end elevation of the stop of Fig. 1 A rail car stop comprises mounting means and a chock. pivotally mounted thereon. The mounting means comprises a base member 10 having a hooked portion 12 at one end and a hinge pin bush at the other end. Clamping plates 16 are fitted to the base 10 by clamping bolts 1 8 such that the mounting means can be firmly attached to a rail 20 by hooking the hooked portion 12 over one side of base flange 22 of the rail and clamping the other side of the flange 22 between the base and clamping member 16 by tightening down the clamping bolts 18.

The chock 24 comprises two inclined faces 26 each of which are arcuate, the radius of curvature of the arc corresponding to the radius of the tread of a wheel 28 of the rail car. The surfaces 26 are formed on a shoe portion 30 of the chock which is bolted to the main body portion 32 thereof by bolts 34, the main body portion in turn being provided with a central bush 36 and a pair of end plates 38 each being bored for reception of a hinge pin 40 carried by the bush 14. A handle 42 extends between the main body portion of the chock and the bush 36.

It will be realised that the mounting means can be firmly clamped to a rail at a location where it is desired to hold a rail car against movement. The chock 24 is brought to an operative position by pivoting it about the pin 40 such that it overlies the rail, as shown in the drawings. To allow the rail car to pass this location the chock may be removed from the rail simply by hingeing it outwardly of the rail, that is in the anticlockwise direction as viewed in Fig. 2 by use of the handle 42.

As a safety feature, to hold the chock in its in use position locking pins 44 are provided, the pins passing through holes in the end plates 38 of the chock and fixed plates 46 attached to the clamp plates 1 6 of the mounting member the holes being aligned when the chock 24 is in the in use position. So that the locking pins are not easily misplaced when not in use they are attached to the chock 24 by a short length of chain 48.

Furthermore to prevent the accidental removal thereof from the in use position each pin 44 is provided with a swing locking link 50 at its free end, the link normally preventing withdrawal of the pin but, on manipulation such that its longitudinal axis corresponds with the longitudinal axis of the pin, allowing removal of the pin.

Various modifications can be made without departing from the scope of the invention, for example the chock member need not be hingedly mounted on the mounting means, but rather couid be slidably mounted thereto, i.e. transversely of the rail. If the stop has to be permanently positioned at a location on the track the mounting means may be permanently fixed by bolting or welding to the rail at that location. Other means may be employed to retain the chock in the in use position and the shoe member 30 may be replaced by another shoe member having arcuate inclined surfaces of different radii of curvature to act on different diameter wheels.

It will be realised that the invention provides a safe and reliable device which can be readily moved to and from its in use position by an operator whose hand at all times remains clear of the rails and rail car wheels. It is simple in construction yet sufficiently robust. The moving parts thereof are at a minimum and are all designed with safety in mind.

Whilst endeavouring in the foregoing specification to draw attention to those features ol the invention believed to be of particular importance it should be understood that the applicant claims protection in respect of any patentable feature or combination of features hereinbefore referred to whether or not particular emphasis has been placed thereon.

1. A rail car parking stop comprising a chock member for engagement with a wheel of a rail car and mounting means for the chock adapted for rigid fitment to a rail, the chock being movable with respect to said mounting means.

2. A stop as claimed in claim 1, in which the chock is provided with inclined arcuate faces on each of its sides the radius of curvature of the arc corresponding to the radius of the tread of a rail car wheel.

3. A stop as claimed in claim 1 or claim 2, in which the mounting means are adapted for clamping to the flange of a rail and the chock is pivotally mounted thereon such that it can swing into position over the rail into the path of travel of a rail car wheel or out of position away from the

**WARNING** end of DESC field may overlap start of CLMS **.

Claims

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Rail car parking stop The present invention relates to a rail car parking stop. According to the present invention there is provided a rail car parking stop comprising a chock member for engagement with a wheel of a rail car and mounting means for the chock adapted for rigid fitment to a rail, the chock being movable with respect to said mounting means. The chock may be provided with inclined arcuate faces on each of its sides, the radius of curvature of the arc corresponding to the radius of the tread of a rail car wheel. Preferably the mounting means are adapted for clamping to the flange of a rail and the chock is pivotally mounted thereon such that it can swing into position over the rail into the path of travel of a rail car wheel or out of position away from the rail to allow passage of the rail car thereby. Means may be provided for locking the chock in its position above the rail and to facilitate movement of the chock from its in use to its out of use position a handle may be prdvided. An embodiment of the present invention will now be described by way of example only with reference to the accompanying drawings in which: Fig. 1 is an elevation of a rail car parking stop; Fig. 2 is an end elevation of the stop of Fig. 1 A rail car stop comprises mounting means and a chock. pivotally mounted thereon. The mounting means comprises a base member 10 having a hooked portion 12 at one end and a hinge pin bush at the other end. Clamping plates 16 are fitted to the base 10 by clamping bolts 1 8 such that the mounting means can be firmly attached to a rail 20 by hooking the hooked portion 12 over one side of base flange 22 of the rail and clamping the other side of the flange 22 between the base and clamping member 16 by tightening down the clamping bolts 18. The chock 24 comprises two inclined faces 26 each of which are arcuate, the radius of curvature of the arc corresponding to the radius of the tread of a wheel 28 of the rail car. The surfaces 26 are formed on a shoe portion 30 of the chock which is bolted to the main body portion 32 thereof by bolts 34, the main body portion in turn being provided with a central bush 36 and a pair of end plates 38 each being bored for reception of a hinge pin 40 carried by the bush 14. A handle 42 extends between the main body portion of the chock and the bush 36. It will be realised that the mounting means can be firmly clamped to a rail at a location where it is desired to hold a rail car against movement. The chock 24 is brought to an operative position by pivoting it about the pin 40 such that it overlies the rail, as shown in the drawings. To allow the rail car to pass this location the chock may be removed from the rail simply by hingeing it outwardly of the rail, that is in the anticlockwise direction as viewed in Fig. 2 by use of the handle 42. As a safety feature, to hold the chock in its in use position locking pins 44 are provided, the pins passing through holes in the end plates 38 of the chock and fixed plates 46 attached to the clamp plates 1 6 of the mounting member the holes being aligned when the chock 24 is in the in use position. So that the locking pins are not easily misplaced when not in use they are attached to the chock 24 by a short length of chain 48. Furthermore to prevent the accidental removal thereof from the in use position each pin 44 is provided with a swing locking link 50 at its free end, the link normally preventing withdrawal of the pin but, on manipulation such that its longitudinal axis corresponds with the longitudinal axis of the pin, allowing removal of the pin. Various modifications can be made without departing from the scope of the invention, for example the chock member need not be hingedly mounted on the mounting means, but rather couid be slidably mounted thereto, i.e. transversely of the rail. If the stop has to be permanently positioned at a location on the track the mounting means may be permanently fixed by bolting or welding to the rail at that location. Other means may be employed to retain the chock in the in use position and the shoe member 30 may be replaced by another shoe member having arcuate inclined surfaces of different radii of curvature to act on different diameter wheels. It will be realised that the invention provides a safe and reliable device which can be readily moved to and from its in use position by an operator whose hand at all times remains clear of the rails and rail car wheels. It is simple in construction yet sufficiently robust. The moving parts thereof are at a minimum and are all designed with safety in mind. Whilst endeavouring in the foregoing specification to draw attention to those features ol the invention believed to be of particular importance it should be understood that the applicant claims protection in respect of any patentable feature or combination of features hereinbefore referred to whether or not particular emphasis has been placed thereon. CLAIMS

3. A stop as claimed in claim 1 or claim 2, in which the mounting means are adapted for clamping to the flange of a rail and the chock is pivotally mounted thereon such that it can swing into position over the rail into the path of travel of a rail car wheel or out of position away from the rail to allow passage of the rail car thereby.

4. A stop as claimed in any one of claims 1 to 3.

in which means may be provided for locking the chock in its position above the rail.

5. A stop as claimed in any one of the preceding claims, in which a handle is provided on the chock to facilitate movement of the chock from its in use to its out of use pOsition.

6. A stop as claimed in claim 4 or claim 5, in which the locking means comprises a pin including a locking link adapted to pass through passages in the chock and mounting means.

7. A stop as claimed in claim 4 or claim 5, in which the locking means comprises a clip arrangement mounted on the chock and movable into or out of locking engagement with the mounting means.

8. A rail car parking stop substantially as hereinbefore described with reference to the accompanying drawing.

9. Any novel subject matter or combination including novel subject matter herein disclosed, whether or not within the scope of or relating to the same invention as any of the preceding claims.