METHOD FOR UNDERFILLING A SWITCH POINT

Abstract

During the tamping of a switch, a switch section delimited by two adjacent sleepers is photographed in a front machine section for producing a reference photo, and the photo is stored. The stored reference photo is automatically made available on a monitor, positioned in a work cabin, for observation by an operator as soon as the tamping tools are situated above the section of the switch shown by the reference photo.

Claims

1-4. (canceled)

5. A method of tamping a switch by immersion of tamping tools into ballast of a track, the method comprising: a) in a forward machine section with regard to a working direction, photographing a switch section delimited by two adjacent sleepers for producing a reference photo, and storing the reference photo; b) automatically making available the stored reference photo (13 on a monitor, positioned in a work cabin, for observation by an operator when the tamping tools are situated above the switch section of the switch shown by the reference photo; and c) immersing the tamping tools into the ballast and tamping the ballast in the switch section.

6. The method according to claim 5, which comprises taking the reference photo as a top view of the switch section in relation to a reference line, defined as track center of the track being traveled upon by a switch tamping machine, and a reference section defined by a track gauge.

7. The method according to claim 5, which comprises superimposing a known position of the tamping tools relative to the track on the reference photo to thereby enable the operator to recognize a position of the tamping tools relative to the track.

8. The method according to claim 7, which comprises representing the tamping tools in a simplified manner and in a true-to-scale relationship to the reference section.

9. The method according to claim 8, which comprises displaying the tamping tools in a rectangular outline.

Description

[0008] The invention will be described in more detail below with reference to an embodiment represented in the drawing in which FIG. 1 shows a side view of a switch tamping machine and FIGS. 2 to 5 each show pictures of a switch section appearing on a monitor.

[0009] A switch tamping machine 1 shown in FIG. 1 has tamping units 2 whichalong with track lifting devices 3are designed especially for tamping a switch 4. This design has to take into account above all the fact that many tamping and lifting zones are present in the switch 4 which are accessible only in a limited way, or even not at all.

[0010] Provided immediately rearward, with regard to a working direction 5, of the tamping units 2, which have tamping tools 8, is a work cabin 6 in which there is located, in addition to various control devices, also a monitor 7 to be observed by an operator. At a front machine section 9 of the switch tamping machine 1, with regard to the working direction 5, an array of photo cameras 10 is arranged.

[0011] The method according to the invention will now be described in more detail: As can be seen in FIGS. 2 to 5, a switch section 12 delimited by two adjacent sleepers 11 is photographed in the front machine section 9 during a tamping operation (i.e. with the machine 1 standing still) to produce a reference photograph 13 and stored.

[0012] This stored reference photo 13 is automatically made available on the monitor 7, positioned in the work cabin 6, for observation by the operator as soon as the tamping tools 8 are situated above the switch section 12 shown by the reference photo 13.

[0013] The reference photo 13 is taken as a top view of the switch section 12 in relation to a reference line 14defined as track center of the track travelled upon by the switch tamping machine 1and a reference section a defined by a track gauge.

[0014] The operator is now in a position to be able to optimally assess the already mentioned limited situation of possible tamping zones 15 for employing the tamping tools 8.

[0015] As shown as an advantageous auxiliary aid in FIG. 4, a known position of the tamping tools 8 relative to the switch section 12 can alternatively be superimposed automatically on the reference photo 13 in this manner. Thus, the position of the tamping tools 8 relative to the track or the rails 16 can be recognized precisely by the operator.

[0016] The tamping situation shown in FIG. 4 would demonstrate unmistakably that the tamping tools 8 positioned to the right of the rail 16 of a main track in each case cannot be employed since there is a clearly visible overlapping with the adjoining rail 16. A control cabinet 17 present in this switch section 12 precludes any possibility, even limited, of employing the tamping tools 8.

[0017] In an alternative embodiment, the tamping tools 8 can also be represented, i.e. superimposed on the photo, in a simplified manner in the shape of a preferably rectangular outline (see FIG. 3) and in the true-to-scale relationship to the reference section a.

[0018] As indicated in FIG. 5, grid lines 18 can also be superimposed on the reference photo 13 as an orientation aid for the operator. These grid lines 18 could, for example, indicate the central position of the tamping tools 8.