JPH0455051Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention relates to an inspection wheel used in a track straightening machine, and in particular, the invention relates to an inspection wheel used in a track straightening machine. Concerning inspection wheels.

[Prior Art] In general, when aligning a track, there are two steps: height adjustment to correct irregularities in the longitudinal direction of the track rails, and level adjustment to correct the difference in height between the left and right rails to a predetermined value. This is collectively called leveling correction. In addition, straightening is also carried out to correct unevenness in the length direction of the rail, and this is called lining straightening.

In each of these straightening operations, it is necessary to accurately measure the condition of the track before straightening. Therefore, in the track alignment machine, an inspection wheel is placed at the alignment point of the track, and the inspection wheel is run on the rail to measure the exact position of the rail. In this case, the detection device serves both as a leveling inspection and a lining inspection, and therefore consideration has been made so that the inspection wheel can also carry out both inspections.

In other words, this type of track straightening machine has reference parts installed before and after the track straightening machine, and a reference line (wire or light beam) is stretched between the front and rear reference parts, so that almost all of the track straightening machine A detection unit provided in the center measures how far the sensor deviates from this reference line. The detection section has a test wheel at its lower part, and this test wheel runs on the rail in that part. Therefore,
If there is an upward deviation in the rail of the detection unit, the inspection wheel will rise relative to the mount of the track straightening machine, and the column connected to this inspection wheel will also rise relative to the mount of the track straightening machine. By measuring the deviation between the tip of the support and the reference line, the vertical deviation of the rail can be determined. On the other hand, when there is a lateral deviation in the rail, the inspection wheel will deviate from the left and right with respect to the mount of the track straightening machine, so by measuring the deviation between the mount and the inspection wheel,
It is possible to measure the amount of deviation of the rail in the left and right direction. At this time, in the track straightening machine, the support of the measuring device is supported on the pedestal of the track straightening machine so as to be able to rise and fall freely, but cannot be moved in the left-right direction. Therefore, in order to eliminate the difference in movement between the column that moves only up and down and the inspection wheel that moves left and right, we installed a reference bar that extends horizontally at the bottom of the column instead of directly fixing it to the inspection wheel and column. By supporting the inspection wheel so that it can move left and right, the inspection wheel can follow the rail even if it deviates in any direction (up, down, left, or right). Therefore,
The reference is the mount of the track straightening machine, on which a support column and a reference bar are supported so as to be movable up and down, and the inspection wheel is supported on this reference bar so as to be movable left and right.

By the way, leveling inspection is a method of inspecting the track in the vertical direction, so in order to avoid the influence of local unevenness on the surface of the rail head, the inspection has two reference wheels and a follower wheel at the front and rear. using a measuring wheel,
The measured value in the rail height direction is calculated from the height of the midpoint. On the other hand, lining inspection involves measuring the dimension from the reference line stretched in the rail running direction to the rail at each point of the reference parts installed at the front and rear of the track straightening machine and the measurement part installed at the center. The adjustment amount in the measuring section is calculated from the measured value at each point. Therefore, regarding this lining adjustment,
It is important to accurately measure the dimensions between the rail and the reference line, and a wheel with a flange is usually used, which is pressed firmly against the side of the rail head with a lining cylinder to avoid measurement errors. .

Next, the inspection wheel used in the conventional detection device will be specifically explained with reference to FIGS. 2 to 4. Note that although the figure shows only the inspection wheels running on one rail, in the actual device they are provided symmetrically on both rails.

A pair of left and right columns are supported on the frame of the track straightening machine so that they can be raised and lowered, and the ends of a reference bar 3, which is disposed perpendicularly to the longitudinal direction of the rail, are attached to the lower ends of the left and right columns 1 via pins 2. connected. A truck frame 4 that moves along the reference bar 3 is supported. In addition, the ends of the bogie frame 4 are designed to prevent backlash in the direction perpendicular to the rail surface of the reference bar 3.
A roller 5 that clamps and guides this reference bar 3;
5 is provided. In addition, this bogie frame 4 has
Rollers 6, 6 are provided to prevent the reference bar 3 from wobbling in the longitudinal direction of the rail and to sandwich the reference bar 3. A lining cylinder 7 is provided between the bogie frame 4 and the mount B of the track straightening machine, and the lining cylinder 7 allows the bogie frame 4 to move along the reference bar 3 in the longitudinal direction of the rail. It is designed to move in a direction perpendicular to the opposite direction.

At the end of the trolley frame 4, there is a holding frame 8 for the inspection wheel.
It is attached to the bogie frame 4 so as to form a substantially T-shape. A substantially central portion of the holding frame 8 is rotatably attached to a shaft 9 that fits into bushes 10 provided on both sides of the truck frame 4. Further, in the longitudinal direction of the rail of the holding frame 8, a reference wheel 11 and a follower wheel 12 are rotatably supported. Among these, the reference wheel 11 is a flange wheel having a flange portion 11a that comes into contact with the side surface of the head of the rail.

In such a conventional inspection wheel, a support column 1 that moves up and down according to the irregularities in the longitudinal direction of the rail is supported between the two front and rear wheels, the reference wheel 11 and the follower wheel 12, so that the leveling adjustment is possible. The measured value at the alignment point on the hour is the average value of the two wheels. Further, during lining inspection, the flanged reference wheel 11 is strongly pressed against the side surface of the rail head on the reference side by the force of the lining cylinder 7 that presses the bogie frame 4. Then, the dimension A between this reference wheel 11 and the reference line L indicated by the dashed line in the figure is measured with a measuring device such as a potentiometer installed approximately at the center between the wheels of the track straightening machine. The amount of displacement of the rail (also called Masaya) was calculated based on this measured value, and the unevenness of the rail in the running direction was corrected based on the amount of displacement.

[Problems that the invention attempts to solve] By the way, if the straightening work continues for a certain amount of time,
Inevitably, the shaft 9 and bush 10 will wear out and play. If lining adjustment is performed with this backlash, when the lining cylinder 7 presses the flanged reference wheel 11 against the side surface of the rail head, the reference wheel 11 will swing by the amount of backlash using the shaft 9 as a fulcrum. Become.
As a result, the measured dimension A between the reference line L and the rail becomes out of order, resulting in a problem that an accurate adjustment amount cannot be calculated.

This also applies when the wheels themselves are worn out.
When the thickness of the flange that contacts the side surface of the rail head decreases due to wear, the measured dimension A between the reference line and the rail appears larger than the actual value by the amount of wear, resulting in a measurement error.

The present invention was proposed in order to solve the problems of the conventional technology as described above, and even if there is play in the shaft 9 or the bush 10 that holds the wheel holding frame, the reference wheel part will be accurate. It is equipped with a steady rest device that can maintain a certain measurement dimension A and adjust the position of the reference wheel to prevent measurement errors even if the wheels are worn and the wheel spacing changes. Our goal is to provide inspection wheels.

[Means for solving the problem] In the inspection wheel equipped with the steady rest device of the present invention, a bracket is provided on the bogie frame to which the holding frame of the reference wheel is attached, and a screw rod is attached to this bracket in accordance with the position of the reference wheel. By providing a pressing means such as a steady rest cylinder or the like and supporting the holding frame of the reference wheel from the width direction of the rail via a receiving plate provided at the tip of this pressing means, play in the mounting part of the holding frame can be prevented. Despite the wear of the wheels, when the flange of the reference wheel is pressed against the side surface of the head of the rail by the lining cylinder, an accurate measured dimension A can be maintained.

[Example] Hereinafter, an example of the present invention will be described in detail with reference to FIG. Note that the same members as those of the conventional inspection wheel are given the same reference numerals, and the description thereof will be omitted.

A bracket 20 extending parallel to the holding frame 8 is provided on the truck frame 4, and a steady rest device 19 is provided on this bracket 20. In this embodiment, the steady rest device 19 uses a threaded rod 22 as a means for pressing the holding frame 8, and a threaded hole 21 is bored at the tip of the bracket 20.
A screw rod 22 is screwed into this screw hole 21. The tip of this screw rod 22 is connected to the holding frame 8.
A receiving plate 23 is provided at the tip of the screw rod 22, which protrudes toward the side and comes into contact with the side surface of the holding frame 8. In this embodiment, an appropriate cushioning material 24 is attached to the surface of the receiving plate 23. On the other hand, a locking nut 25 is screwed into the other end of the threaded rod 22. Also, screw rod 22
The end portion 26 of is machined into a square shape so that it can be rotated using a tool. It goes without saying that the pressing force of the threaded rod 22 is set to such an extent that rotation of the holding frame 8 is not inhibited.

In an inspection wheel equipped with such a steady rest device, when the screw rod 22 is screwed into the screw hole 21 of the bracket 20, the holding frame 8 is held in the longitudinal direction of the rail by the receiving plate 23 at the tip of the screw rod 22. This means that the holding frame 8 is pushed in the right angle direction, so that no play occurs in the holding frame 8. Therefore, even when the flange of the reference wheel 11 is pressed against the side surface of the rail head by the lining cylinder 7, the measured dimension A does not deviate.
Lining adjustment can be performed accurately. Furthermore, even if there is no play in the shaft 9, bush 10, etc., if the reference wheel wears out, the measured dimension A will be out of order.In this case, too, the present invention adjusts the threaded rod 22 of the steady rest device according to the degree of wear. Adjust and standard wheel 11
By pushing out toward the rail side, it is possible to prevent errors from occurring in the measured dimension A.

Note that the present invention is not limited to the above-described embodiment, and a steady rest cylinder may be used as the pressing means instead of the threaded rod 22 as described above. In that case, the base of the steady rest cylinder may be connected to the bracket 20, and the tip of the rod of the cylinder may be attached to the receiving plate 23. Moreover, as the receiving plate 23, one using a thrust bearing can also be used.

[Effects of the invention] As described above, according to the inspection wheel equipped with the steady rest device of the present invention, it is easy to press the holding frame with the receiving plate provided at the tip of the pressing means such as a screw rod or steady rest cylinder. This configuration prevents rattling during inspection even if the shaft or bushings are worn, and can also cope with the wear of the reference wheels, so accurate measurement dimension A can be maintained at all times, making it easy to use when adjusting the lining. This has great effects, such as not causing measurement errors.

[Brief explanation of the drawing]

Fig. 1 is a plan view of an embodiment of an inspection wheel equipped with a steady rest device of the present invention, and Figs. 2 to 4 show conventional inspection wheels; Fig. 2 is a plan view; 3
The figure is a front view, and FIG. 4 is a side view. 1... Prop, 2... Pin, 3... Reference bar, 4
...Bogie frame, 5, 6 ... Roller, 7 ... Lining cylinder, 8 ... Holding frame, 9 ... Shaft,
10...butsuyu, 11..., reference wheel, 11a
... Flange section, 12 ... Follower wheel, 19 ... Steady rest device, 20 ... Bracket, 21 ... Screw hole, 2
2... Threaded rod, 23... Receiving plate, 24... Cushioning material, 25... Locking nut, 26... End portion.

Claims (1)

[Scope of Claim for Utility Model Registration] A pair of left and right columns are supported on the frame of the track straightening machine so that they can be raised and lowered, and a reference bar extending in the width direction of the rail is connected between the lower ends of the left and right columns. supports the bogie frame that moves along this, and
The reference bar has a pair of left and right holding frames that are rotatable in the vertical direction around an axis extending in the width direction of the rail provided in the center of the frame, and a reference wheel and a follower wheel can be rotated on these holding frames. An inspection wheel in which a flange is formed on the reference wheel, and a lining cylinder is attached between the bogie frame and the track straightening machine so as to press the flange against the side surface of the rail head, An inspection wheel equipped with a steady rest device, characterized in that a bracket is provided on the bogie frame, and a pressing means for pressing the holding frame in the width direction of the rail is disposed on the bracket.