Track surfacing
AssigneeFranz Plasser Bahnbaumaschinen-Industriegesellschaft m.b.H.
InventorJosef Theurer
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Abstract
In track surfacing, a downward thrust is exerted upon the abutting ends of the adjacent rails at a rail joint, the abutting rail ends are simultaneously upwardly bent above the correct track level against the downward thrust and the ballast is tamped under the ties in the region of the joint. For this purpose, control means is arranged to discontinue actuation of the operating means of the track level correction means used to bend the abutting rail ends upwardly when the rail joint level has reached a set limit.
Claims15
In a method of surfacing a track consisting of two rails fastened to ties, abutting ends of adjacent ones of the track rails forming rail joints, wherein the track has a controlled level, the steps of upwardly bending the abutting rail ends above the controlled track level while simultaneously exerting a downward thrust on the abutting rail ends, controlling the upward bending stroke to limit the same, and tamping ballast under the ties in the region of the upwardly bent rail joints to maintain them upwardly bent.
In a mobile apparatus for surfacing a track consisting of two rails fastened to ties, abutting ends of adjacent ones of the track rails forming rail joints, the track having a controlled level:
- 1. track raising means in the region of the abutting rail ends for bending the rail ends upwardly,
- 2. control means for actuating the track raising means and for discontinuing the actuation after the abutting rail ends have been bent upwardly above the controlled track level, the control means including
- a. limit means for delimiting the upward bend of the abutting rail ends,
- 3. downward thrust means spaced from the track raising means in the region of at least one of the abutting rail ends, and
- 4. tamping means in said region for tamping ballast under the ties.
In a mobile apparatus for surfacing a track consisting of two rails fastened to ties, abutting ends of adjacent ones of the track rails forming rail joints, the track having a controlled level:
- 1. track raising means in the region of the abutting rail ends for bending the rail ends upwardly,
- 2. control means for actuating the track raising means and for discontinuing the actuation after the abutting rail ends have been bent upwardly above the controlled track level, the control means including
- a. limit means for delimiting the upward bend of the abutting rail ends,
- 3. downward thrust means spaced from the track raising means in the region of at least one of the abutting rail ends,
- a. the downward thrust means including a frame bridging a respective one of the rail joints and running gears mounted on the frame and imparting a downward thrust to the abutting rail ends, and
- 4. tamping means for tamping ballast under the ties.
In a mobile apparatus for surfacing a track consisting of two rails fastened to ties, abutting ends of adjacent ones of the track rails forming rail joints, the track having a controlled level:
- 1. track raising means in the region of the abutting rail ends for bending the rail ends upwardly,
- 2. control means for actuating the track raising means and for discontinuing the actuation after the abutting rail ends have been bent upwardly above the controlled track level, the control means including
- a. limit means for delimiting the upward bend of the abutting rail ends,
- 3. downward thrust means spaced from the track raising means in the region of at least one of the abutting rail ends,
- 4. tamping means for tamping ballast under the ties,
- a. the tamping means constituting the track raising means in the region of the abutting rail ends for bending the rail ends upwardly,
- 5. a track lifting means for lifting the track to a corrected level,
- 6. a reference system for determining the corrected track level,
- 7. means for actuating the track lifting means in controlled response to the reference system,
- 8. a main apparatus frame carrying the track lifting means and the ballast tamping means, and having a running gear spaced from the tamping means a relatively short distance so as to engage one of the abutting rail ends when the tamping means is substantially centered over a respective one of the rail joints and the track lifting means being spaced from the tamping means a relatively short distance so as to engage the other abutting rail end when the tamping means is so centered, and
- 9. the control means comprising a first control element blocking the track lifting means in the vertical position assumed when the track lifting means has lifted the track to the corrected level, the running gear and the blocked track lifting means constituting the downward thrust means, a second control element discontinuing operation of the tamping means to terminate upward bending of the abutting rail ends against the downward pressure of the thrust means, and a control device connected to the first and second control elements, a first output of the control device operating the first control element to block the track lifting means at the corrected track level and a second output of the control device operating the second control element to discontinue operation of the tamping means above said level.
Dependencies are inferred from the claim text.