JPS6357746B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rail joint plate detection device provided in a rail gripping mechanism of a rail lifting device in a track straightening machine.

Normally, track straightening work using a track straightening machine involves creating a reference line or reference plane using light beams, steel wires, threads, etc., and checking the height, level, and deviation of the rail with respect to this reference line or reference plane. This is done by detecting, correcting, and compacting the roadbed gravel on the underside of the sleepers that support the rails using a compaction device. in this case,
To correct the height deviation of the rail with respect to the reference line or reference plane, as shown in Figure 1 (only the right half is shown as it is symmetrical with respect to the center line),
, a lifting hydraulic cylinder B attached to this frame A, and a rail catch box 1 to which the rod side of this lifting hydraulic cylinder B is attached.
, the rail gripping mechanism 2 attached to this rail catch box 1, and the link C to the frame A.
The rail 3 is lifted up by the required amount by a rail lifting device consisting of a reaction force receiving hydraulic cylinder D having a foot E attached through the rail.

That is, the rail gripping mechanism 2 includes a rail grip 4, a link 5, and a hydraulic cylinder 6, and the rail grip 4 is attached to the link 5 so as to be rotatable about an axis 18 with respect to the link 5. The link 5 and the hydraulic cylinder 6 are rotatably attached to the rail catchbox 1 via a shaft 7 and an ear 9, respectively. Further, the link 5 is connected to the piston rod 1 of the hydraulic cylinder 6 via the pin 8.
A cam 12 is also attached to this ring 5 with a mounting bolt 15. A mounting base 13 is attached to the rail catchbox 1 with fixing bolts 16, and a limit switch 14 is attached to the mounting base 13. By loosening the fixing bolt 16, the distance between the cam 12 and the limit switch 14 can be adjusted.

In order to lift the rail 3 by the required amount using the rail gripping mechanism 2 having the above configuration, first,
In the seamless part of the flat rail, as shown in FIG. 1, the foot E of the reaction force receiving hydraulic cylinder D is grounded, and the piston rod 10 of the hydraulic cylinder 6 is
The link 5 is rotated clockwise about the shaft 7, and the rail grip 4, which is integrated with the link 5, is engaged with the upper neck of the rail 3, and the foot of the reaction force receiving hydraulic cylinder D is pushed out. E is grounded, and the rail catchbox 1 to which the rail gripping mechanism 2 is attached is lifted by the required amount by the lifting hydraulic cylinder B of the rail lifting device. In this case, the cam 12 and the limit switch 14 do not engage, so the limit switch 14 does not operate. Also,
When the track straightening machine moves during straightening work, the rail grip 4 also rotates while being engaged with the upper neck of the rail 3.
Moves with the track straightener. When the rail grip 4 comes into contact with the joint plate 11, the rail grip 4 rides on the protrusion 17 of the joint plate 11 as shown in FIG. engages with the limit switch 14,
The limit switch 14 is activated and sends a joint plate detection signal, that is, a signal indicating that the rail 3 cannot be lifted up, to the control device (not shown) of the track straightening machine, and prevents the straightening work of the joint plate 11 from being carried out. I was doing it. In this case, since the limit switch 14 is attached to the rail catchbox 1, for example, a slack ( Slacks are installed by expanding the gauge inward on the curve with the outside rail as a reference, and cant (the outside rail is raised higher than the inside rail) or cant (this varies depending on the radius of curvature between the curves, but the maximum is about 25 mm). ) is attached,
Compared to the illustration, the rail grip 4 moves further to the outside of the rail 3 (inner rail), so the gap between the cam 12 and the limit switch 14 becomes smaller, and finally the cam 12 and the limit switch 14
may engage at a location other than the rail joint.

Further, when the rail grip 4 is provided inside the rail 3, the gap between the cam 12 and the limit switch 14 becomes large at the curved portion of the rail, and the cam 12 and the limit switch 14 cannot be engaged with each other.

In addition, there are various shapes of joint plates (for example, I
There are different shapes (L-shaped, rectangular, etc.), each with different dimensions.

Also, if the types of rails are different (30 rails,
37 rail, 40N rail, etc.), the dimensions of each part of the rail are different.

As mentioned above, in each case, there was a drawback in that it was necessary to check and adjust before the straightening work that the cam 12 and limit switch 14 would definitely engage at the joint.

In view of the above points, the present invention provides a rail joint plate detection device that can detect a joint plate at a rail joint, regardless of the slack or cant of a curved portion, the type of joint plate, or rail.

Hereinafter, one embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 3 is a front view when the rail joint plate device of the present invention is located at a portion of the rail where there is no joint plate, and FIG. 4 is a front view when the rail joint plate detection device is located at a portion of the rail where there is no joint plate. . FIG. 5 shows another embodiment of the rail joint plate detection device of the present invention, and is a front view when the rail joint plate detection device of the present invention is located at a part of the rail where there is no joint plate, and FIG. 6 shows the rail joint plate detection device of FIG. It is a front view when it exists in a part of a board.

In FIGS. 1 to 6, the same numbers represent the same members.

In FIGS. 3 and 4, the rail joint plate detection device 19 is composed of a proximity switch 20, a proximity switch mounting base 21, and a proximity switch fixing nut 22. The proximity switch mounting base 21 is fixed to the rail gripping mechanism 2 by screws, welding, etc.
On this proximity switch mounting base 21, a proximity switch 20 whose outer cylinder is threaded is attached to two fixing nuts 2.
2, it is mounted so that its mounting position can be adjusted in the left-right direction, facing the side surface of the head of the rail. In addition, the proximity switch 20 is connected to the cable 23
It is connected to a control device (not shown) of the track straightening machine via. The structure and function of the rail gripping mechanism 2 are the same as those shown in FIG.

In the above configuration, as shown in FIG.
When the rail grip 4 is engaged with the upper neck of the rail 3 in order to lift the rail 3 when there is no joint plate, the proximity switch 20 of the rail joint plate detection device 19 and the side surface of the rail head are connected. If the gap (operating gap of the proximity switch 20) is adjusted appropriately,
Proximity switch 20 is activated and transmits a signal to the control device via cable 23 that the seam plate 11 is absent. This signal can therefore activate the lifting device and the compaction device (not shown). However, when the rail joint plate detection device 19 is located at the rail joint plate 11 as shown in FIG. 4, the rail grip 4 rides on the protrusion 17 of the joint plate 11,
The rail grip 4 cannot engage with the lower end of the head of the rail 3, so the gap between the proximity switch 20 and the side surface of the rail 3 becomes large, and the proximity switch 20 does not operate. Therefore, it is possible to detect the presence of the joint plate 11 on the rail 3, so the lifting device 1 and the compacting device are not operated at this joint plate 11 portion.

Note that the rail joint plate detection device 19 of the present invention is as follows:
Since it is attached to the rail gripping mechanism 2, if the proximity switch 20 is adjusted so that it is activated when the rail grip 4 is engaged with the upper neck of the rail 3 at the beginning of work, it will prevent slack or cant on the curved section. Even if the rail is attached, by operating the cylinder 6 and engaging the rail grip 4 with the upper neck of the rail, the gap between the side surface of the rail head and the proximity switch 20 is maintained such that the proximity switch 20 is activated. Also,
Even if there are various types of joint plates, the rail grip 4 always comes into contact with the joint plate 11, so the proximity switch 20 does not operate. Furthermore, even if the width of the rail head changes due to different types of rails, the gap between the side surface of the rail head and the proximity switch 20 is maintained within the operating range. In this way, the joint plate 11 at the joint of the rail 3 can be detected without being affected by the slack or cant of the curved portion, the type of the joint plate or rail, etc.

5 and 6 show other embodiments of the rail joint plate detection device of the present invention. That is,
The rail joint plate detection device 24 includes a proximity switch 20,
It is composed of a proximity switch mounting base 25 and a proximity switch fixing nut 22. The proximity switch mounting base 25 is fixed to the rail gripping mechanism 2 by screws, welding, etc., and the proximity switch 20 is fixed to the rail gripping mechanism 2 by screws or welding.
is attached by two fixing nuts 22 so as to face the tread surface of the rail so that its mounting position can be adjusted in the vertical direction. The other configurations and functions are exactly the same as those in FIGS. 3 and 4. With the above configuration, when the rail joint plate detection device 24 is located in a part of the rail 3 where there is no joint plate 11 as shown in FIG. When engaged with the upper neck, if the gap between the proximity switch 20 of the rail joint plate detection device 24 and the tread of the rail 3 is adjusted appropriately, the proximity switch 20 will operate and send a signal to the cable that the joint plate 11 is not present. 23 to the control device. However, the joint plate 1 of rail 3
1, the rail grip 4 rides on the protrusion 17 of the joint plate 11, and the rail grip 4 cannot engage with the lower end of the head of the rail 3, as shown in FIG. 20 is laterally displaced from the rail tread, and the proximity switch 20 does not operate.
Therefore, the presence of the joint plate 11 on the rail 3 can be detected.

In the case of FIGS. 5 and 6, even if the side surface of the head of the rail 3 is abnormally worn, the joint plate 11 of the rail 3 can be automatically detected without being affected by the abnormal wear, and the rail bond can be detected automatically. There is no interference with etc. In addition, since the proximity switch 20 is activated by adjusting the gap between the proximity switch 20 and the tread of the rail, the joint plate 11 of the rail 3 The ability to detect is exactly the same as in the case of FIGS. 3 and 4.

As described above, the rail joint plate detection device of the present invention can automatically detect the rail joint plate regardless of the slack or cant of the curved portion of the rail, or the type of the joint plate or rail. It's large.

[Brief explanation of the drawing]

Figure 1 is a front view of a conventional rail joint plate detection device in a rail joint plate area where there is no rail joint plate, and Figure 2 is a front view of a conventional rail joint plate detection device located in a rail joint plate area. FIG. 3 is a front view when the rail joint plate detection device of the present invention is located at a portion of the rail where there is no joint plate, and FIG. 4 is a front view when the rail joint plate detection device of FIG. 3 is located at a joint of the rail. FIG. 5 is a front view when the rail joint plate detection device according to another embodiment of the present invention is located on a portion of the rail where there is no joint plate, and FIG. FIG. 3 is a front view of the rail joint plate detection device located at the joint plate of the rail. A...Rail lifting device, 2...Rail grasping mechanism, 3...Rail, 4...Rail grasping, 5...Link, 6...Hydraulic cylinder, 11...Joint plate, 1
9, 24...Rail joint plate detection device, 20...Proximity switch, 21, 25...Proximity switch mounting base, 22...Fixing nut, 23...Cable.

Claims (1)

[Scope of Claims] 1. A rail gripping mechanism of a rail lifting device of a track straightening machine in which the link is rotated by a hydraulic cylinder and a rail grip is engaged with the upper neck of the rail is provided in the vicinity of the link. Switch mounting base: When the rail grip engages with the upper neck of the rail head on this proximity switch mounting base, it is confirmed that there is no joint plate.
In addition, if the rail grip rides on the protrusion of the joint plate and does not engage with the upper neck of the rail, the rail grip is installed in advance so that its operating gap can be adjusted with respect to the rail so that the presence of the joint plate can be detected. A rail joint plate detection device characterized by being a proximity switch. 2. The rail joint plate detection device according to claim 1, wherein the proximity switch mount is attached to the link so that the proximity switch attached to the proximity switch mount faces the side surface of the head of the rail. 3. The rail joint plate detection device according to claim 1, wherein the proximity switch mount is attached to the link such that the proximity switch attached to the proximity switch mount faces the tread of the rail.