JPH0261569B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for automatically raising and lowering the polishing section of a rail polisher that polishes the upper surface of a laid rail.

If the upper surface of the laid rail is rough, it will generate noise, so a rail polishing machine has been devised, for example, as shown in Japanese Utility Model Publication No. 56-29361. In FIG. 1, a sanding machine main body 1 of a conventional rail sanding machine is shown, and this sanding machine main body 1 has an outer cylinder 2, and this outer cylinder 2 is fixed to a vehicle (not shown) via a support member 3. At the same time, an adjustment cylinder 4 is screwed into the outer cylinder 2. This adjustment tube 4
A rotating shaft 6 is rotatably supported via bearings 5a and 5b. The rotating shaft 6 is provided with a pulley 7 at its upper end and a polishing section 8 made of a grindstone at its lower end, and the polishing section 8 rotates with the driving force transmitted through the pulley 7. It's becoming like that. Further, an adjustment handle 9 is fixed to the upper end of the adjustment tube 4, and by rotating the adjustment handle 9 in forward and reverse directions, the adjustment tube 4 is positioned vertically with respect to the outer tube 2, that is, below the rail sander main body 1. The vertical position of the polishing part 8 with respect to the arranged rail 10 is adjusted. Therefore,
By rotating the rotating shaft 6 and appropriately turning the adjustment handle 9 to press the polishing part 8 against the rail 10 and moving the rail sander main body 1 along the rail 10,
Since the surface of the rail 10 is polished by an appropriate amount to make it smooth, noise can be reduced.

However, if the polishing part 8 continues to rotate when the vehicle is stopped, the rail 1 corresponding to the stopped position
Since only the 0 portion is polished more, stepped portions 11a and 11b are formed between the 0 portion and the other portions, which may result in increasing the noise caused by the running of the vehicle rather than reducing it. Therefore, the operator must always raise the polishing part 8 before polishing, and must lift and lower the polishing part 8 immediately before and after the work vehicle stops, and must use the adjustment handle 9 to perform this work. Not only was this inconvenient as it had to be done with the rotation of the vehicle, but it was also extremely difficult as it had to be matched to the movement of the vehicle.

Therefore, the object of the present invention is to automatically prevent the formation of rail steps that cause noise. a fluid pressure device having a governor device for converting the pressure into the actuator, a position detector for detecting the position of the output lever of the governor device, and a direction switching valve for switching the direction of pressure supply to the actuator based on the output of the position detector; and a support member connected to the actuator of the fluid pressure device, the polishing part of the polishing machine body supported by the support member is pressed against the rail when the vehicle is at a predetermined speed or more, and the rail is pressed when the vehicle is at a predetermined speed or less. This is in the automatic lifting device of the rail sanding machine, which is moved away from the rail sander. Therefore, when the vehicle is at a predetermined speed or higher, the abrasive part is pressed against the rail and polishes the rail, but when the vehicle is at a predetermined speed or less, the abrasive part moves away from the rail and the rail is not polished, and therefore, as described above, There is no formation of a stepped portion, and the above object can be achieved.

Embodiments of the present invention will be described below with reference to the drawings.
In FIG. 2, the outline of the rail sanding machine will first be explained.
It is supported by the vehicle body 13 so as to be vertically movable. Further, a V-belt 14 is wound around the pulley 7 of the polishing machine main body 1, and the polishing section 8 is rotated by a driving motor 15 provided on the vehicle body 13. Since this polishing machine main body 1 is similar to the conventional example, the same parts as shown in FIG.

The vehicle 12 runs on the laid rails 10 with wheels 15a and 15b rotating. A rotary body that rotates as the vehicle 12 travels, for example, a wheel 15a, includes a groove wheel 2 of a governor device 16, which will be described later.
2 are in contact. In addition, 17 is a governor device 16
This is a pressing screw that contacts the frame 20 for supporting the wheel 15, and by rotating this pressing screw 17, the pressing force of the groove wheel 22 against the wheel 15 can be adjusted.

The vehicle 12 also includes a fluid pressure device 35, which will be described later.
A tank 36, a motor 37, a fluid pressure pump 38, a direction switching valve 39, a pressure regulating valve 41, and an actuator 40 are provided, which constitute the vehicle body 13.
The support member 3 is rotated using the support portions 18a and 18b as fulcrums.

In FIG. 3, one configuration example of a governor device 16 is shown, in which a rotating shaft 19 is rotatably supported by a frame 20 via bearings 21a, 21b, and a groove is formed in one end of the rotating shaft 19. car 22
is fixed, and as described above, this groove wheel 22 contacts the flange portion 23 of the wheel 15a, and this wheel 15
Driving force is transmitted from a to the rotating shaft 19. A fixed top 24 is fixed to this rotating shaft 19, and a movable top 25 is opposite to this fixed top 24.
is inserted movably, and a spring 26 is interposed between the fixed piece 24 and the movable piece 25 so that they are biased in a direction to repel each other. Further, one end of arms 27a to 27d is pivotally attached to each of the fixed piece 24 and the movable piece 25, and the arm 2
The other ends of 7a to 27d are fly weights 28a, 2
It is pivoted to 8b. Furthermore, an annular engagement groove 29 is formed in the moving piece 25, and an engagement pin 31 provided at one end of the output lever 30 is formed in this engagement groove 29.
is engaged, and this output lever 30 is connected to the support pin 32
It is pivotally supported by the frame 20 via. Therefore, when the rotating shaft 19 rotates, the flyweights 28a and 28b rotate and spread outward due to their centrifugal force, causing the movable piece 25 to move toward the fixed piece 24 against the spring 26, thereby reducing the output. The lever 30 rotates about the support pin 32 to convert the rotational speed of the wheel 15a into the position of the output lever 30. Note that a limiting wheel 33 is attached to the fixed piece 24 at its boss portion 3.
3a, this limiting wheel 33 has a cylindrical portion 33b integrally formed from the boss portion 33a, and this cylindrical portion 33b is fixed to the fly weight 2.
Fly weights 28a, 28b surround the outer peripheries of the movable pieces 29, 28b, and limit the maximum movement amount of the moving piece 29, that is, the output lever 30, by contacting the cylindrical portion 33b.

The position detector 34 detects the position of the output lever 30 of the governor device 16, and is composed of, for example, a limit switch. The flyweights 28a and 28b are turned on and off by being released, and at the same time as the output lever 30 comes into contact with the flyweights 28a and 28b, the flyweights 28a and 28b are restricted by the restriction wheel 33. However, this position detector 3
The fluid pressure device described below is controlled based on the output of step 4.

In FIG. 4, a specific circuit example of the fluid pressure device 35 is shown, in which a pressure source such as oil or air is stored in a tank 36, and the direction of this pressure source is changed by a fluid pressure pump 38 driven by a motor 37. It is supplied via a valve 39 to an actuator 40, which is, for example, a cylinder. The directional control valve 39 is an electromagnetically operated type and the third
It is operated by the output of the position detector 34 shown in the figure, and when the output lever 30 is away from the position detector 34, the operating rod 40a of the actuator 40 is pushed up, and when the output lever 30 hits the position detector 34, the operating rod 40a of the actuator 40 is pushed up. position and press down the operating rod 40a of the actuator 40. In addition, 41 is a manually operated pressure regulating valve, and the fluid pressure feeding pump 38
The amount of the pressure source discharged from the tank 36 that is returned to the tank 36 is adjusted.

As described above, the support member 3 is rotatable at one end using the support portions 18a and 18b provided on the vehicle body 13 as a fulcrum, and is attached to the polishing machine main body 1 through the mounting hole 42 provided near the other end. The support portions 18a, 18 are fixed slightly in the center of the support member 3.
It is connected to the tip of the output rod 40a of the actuator 40 via a connecting portion 43 provided on the b side. A stopper 44 made of urethane rubber, for example, is provided on the vehicle body 13 opposite to the support member 3.

In the above configuration, if the vehicle 12 is currently stopped, the wheels 15a are not rotated, so the rotating shaft 19 of the governor device 16 is also not rotated, and the moving piece 25 and arm 27 are moved by the pressing force of the spring 26.
a to 27d, fly weights 28a and 28b, and output lever 30 are in the positions shown by solid lines in FIG. Therefore, the output lever 30 is the position detector 3
4, the directional control valve 39 of the fluid pressure device 35 is fixed in position by the output from the position detector 34, as shown by the solid line in FIG.
When the operating rod 40a of the actuator 40 is pushed up, the support member 3 is raised, and the polishing portion 8 of the polishing machine body 1 is separated from the rail 10. Therefore, even if the drive unit 15 is energized and the polishing unit 8 is rotated in this state, the upper surface of the rail 10 will not be polished.

When the vehicle 12 starts to run while rotating the polishing section 8, the fixed piece 24 and the movable piece 2 move together with the rotary shaft 19 via the groove wheel 22 of the governor device 16.
5. Since the spring 26, arms 27a to 27d, flyweights 28a, 28b, and control wheel 33 rotate, the flyweights 28a, 2
Centrifugal force acts on fly weights 28a, 8b,
28b moves outward, thereby moving the moving piece 25
moves against the spring 26. Therefore, when the vehicle 12 reaches a predetermined speed or higher, the flyweights 28a and 28b move toward the cylindrical portion 3 of the control wheel 33, as shown by the two-dot chain line in FIG.
3b and the engagement groove 2 of the moving piece 25.
Since the engagement pin 31 of the output lever 30 is engaged with the output lever 9 , the output lever 30 comes into contact with the position detector 34 . For this reason, the directional control valve 3 of the fluid pressure device 35
9 is switched to the position, fluid is supplied to the actuator 40 in the opposite direction, and the support member 3 is pushed down as shown by the two-dot chain line in FIG. Press it against the top surface and start polishing this rail 10. The amount of polishing of the rail 10 is determined by the pressing force of the polishing part 8 by the actuator 40, and can be changed by operating the pressure regulating valve 41.

Next, when the vehicle 12 becomes lower than the predetermined speed, the output lever 30 of the governor device 16 is activated, contrary to the above case.
moves away from the position detector 34, so the directional control valve 3
9 returns to the position, the support member 3 is raised by the actuator 40, the polishing part 8 of the polishing machine body 1 is separated from the rail 10, and the subsequent polishing is stopped.

As described above, according to the present invention, the polishing part of the polishing machine body is automatically raised and lowered according to the running of the vehicle, and when the vehicle is at a predetermined speed or higher, the polishing part is pressed against the rail, and when the vehicle is at a predetermined speed or lower, the polishing part is pressed against the rail. Since it is separated from the rail, it is possible to prevent step portions from being formed on the rail without requiring any manual labor, and it is possible to reduce the noise caused by the running of the vehicle.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing the main body of a conventional rail sanding machine, Fig. 2 is a side view schematically showing the rail sanding machine according to the present invention, and Fig. 3 is a governor device used in the automatic lifting device in the above. A cross-sectional view showing
FIG. 4 is a configuration diagram showing a fluid pressure device and a support member used in the automatic elevating device according to the above. 1... Polishing machine main body, 3... Supporting member, 8... Polishing section,
DESCRIPTION OF SYMBOLS 10...Rail, 12...Vehicle, 15a, 15b...Wheel, 16...Governor device, 30...Output lever, 34
... Position detector, 35... Fluid pressure device, 39... Directional switching valve, 40... Actuator.

Claims (1)

[Claims] 1. A governor device that converts the rotational speed of a rotating body that rotates as the vehicle travels into the position of an output lever, a position detector that detects the position of the output lever of this governor device, and a It consists of a fluid pressure device having a directional switching valve that switches the direction of pressure supply to the actuator based on the direction of pressure supply to the actuator, and a support member connected to the actuator of the fluid pressure device. An automatic lifting device for a rail sanding machine, characterized in that the vehicle is pressed against the rail when the vehicle is at a predetermined speed or higher, and is moved away from the rail when the vehicle is at a predetermined speed or lower.