JPS6133923B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a roadbed compaction machine that runs on rails and has a compaction device that fills and compresses roadbed gravel under railroad ties and compacts it.

Generally, when filling and compacting road bed gravel at the bottom of railway sleepers, regardless of the compaction method, as shown in Fig. ', compaction is performed from equal distances with equal pressure using beaters 2 and 2' of the compaction device.
Most ideally, the compacted roadbed gravel 4 below the sleepers 1 is distributed symmetrically with respect to the center line A-A' of the sleepers 1, as shown by the dashed line in the figure. This is because each sleeper can equally support the load of the train passing on the rails 3.

However, as shown in FIG. 2, the conventional compaction device 5 includes a vibration excitation unit 11 that rotates an eccentric shaft using a prime mover 12 such as a hydraulic motor or an electric motor to generate vibrations. The beater 2 receives more vibration and is mounted opposite the vibration generating part 11,
2', and a beater opening/closing device 13 which rotates a screw shaft 15 by a prime mover 14 such as a hydraulic motor or an electric motor to open and close the beaters 2, 2'. The guide section 8 provided on the vibration generating section 11 is slidably fitted into the vertical guide rod 7 fixed to the vehicle body 18.
Similarly, the rotation stopper 10 provided in the vibration generating part 11 is
The tightening device 5 is engaged with a guide rod 9 fixed to the vehicle body 18 to prevent it from rotating around the vertical guide rod 7 when moving up and down. In addition, the vibration part 1
1 through the mounting seat 16 provided on its upper part,
It is connected to a piston rod 17 of the vertical hydraulic cylinder 6, and one end of the vertical hydraulic cylinder 6 opposite to the piston rod 17 is attached to a mounting seat 25 fixed to the vehicle body 18.

The compacting device 5 configured as described above is lowered by the vertical hydraulic cylinder 6 and plunged into the roadbed gravel 4 with the beaters 2, 2' open.
When the beaters 2, 2' are closed by the beater opening/closing device 13 and road bed gravel 4 is filled and compressed into the lower part of the sleeper, the center line A-A' of the sleeper 1 and the center line B-B' of the compaction device 5. If they do not match, for example sleeper 1
is approaching the beater 2 side, when the beaters 2 and 2' are closed, the sleeper 1 will move in the direction of the arrow (in the direction of the beater 2'), damaging or damaging the fastening device between the sleeper 1 and the rail 3. Since the arrangement of each sleeper is changed by loosening the fastened state and moving the sleepers, there is a drawback that the load capacity of the sleepers changes.

Further, in another conventional compaction device shown in FIG.
3. Consisting of beaters 2 and 2', curved shaft 2 for excitation
3 is driven by a hydraulic motor or electric motor (not shown) to generate vibrations in the vibration generating part 22, and the vibrations are transmitted to the beaters 2, 2' mounted opposite to the vibration generating part 22.
to communicate. Further, one end of the beater opening/closing hydraulic cylinders 20, 20' on the opposite side to the piston rods 21, 21' is attached to the vibration generating curved shaft 23, and the beaters 2, 2' are attached to the piston rods 21, 21', respectively. The fulcrum 24,
The beaters 2, 2' can be opened and closed via 24'. In this case, the vibrating beaters 2, 2' are plunged into the roadbed gravel 4 by the method described later, and the sleepers 1
When compressing and compacting roadbed gravel 4 at the bottom of the roadbed, if the resistance force of the roadbed gravel 4 acting on the beaters 2 and 2' is different, the beater that receives the larger resistance is stopped, and the beater with the smaller resistance is stopped. The beater opening/closing hydraulic cylinder 2 is moved so that only the beater receiving the force is moved so that the resistance force received by the beaters 2 and 2' is equal.
0 and 20' so that the road bed gravel 4 under the sleeper 1 can be compacted without moving the sleeper 1.

Further, the guide part 8 provided on the vibration generating part 22 of the tightening device 19 is slidably fitted into the vertical guide rod 7 fixed to the vehicle body 18, and The stopper 10 engages with a guide rod 9 fixed to the vehicle body 18, and prevents the tightening device 19 from rotating around the vertical guide rod 7 when it moves up and down. Moreover, the vibration generating part 22 is connected to the vertical hydraulic cylinder 6 via the mounting seat 16 provided on the upper part thereof.
The end of the vertical hydraulic cylinder 6 opposite to the piston rod 17 is attached to a mounting seat (not shown) fixed to the vehicle body 18.

Therefore, the compaction device 19 is lowered by the vertical hydraulic cylinder 6 while vibrating the vibrating part 22, and thrust into the roadbed gravel 4, and the beaters 2, 2' are closed by the beater opening/closing hydraulic cylinders 20, 20'. hand,
When filling and compressing roadbed gravel 4 at the bottom of sleepers 1, the center line A-A' of sleepers 1 and the compaction device 19
If the center lines C-C' of the sleeper 1 are approaching the beater 2 and the center lines of
2' moves in the direction of sleeper 1 so as to sandwich sleeper 1, beater 2 is closer to sleeper 1, so when filling and compressing road bed gravel 4 to the lower part of sleeper 1, sleeper 1 and beater 2 Since the gap between the sleepers 1 and 2' is small, the sleepers 1 try to move through the road bed gravel 4 and are subjected to a greater resistance force than the beaters 2'.
As mentioned above, the beater 2 stops, and only the beater 2' moves in the direction of the sleeper 1 until the resistance force it receives from the roadbed gravel 4 becomes equal to the resistance force being received by the beater 2, and when it becomes equal, it stops. do. Therefore,
The sleeper 1 is not moved by the beater 2, and the beaters 2 and 2' place the road bed gravel 4 under the sleeper 1.
can be compacted by filling and compressing with equal pressure. However, as shown by the dashed-dotted line in FIG. This has the disadvantage that the road bed gravel on the side of the beater 2 is easily destroyed by the load of the train passing over it.

In view of the above points, the present invention allows the compaction device to move freely in the front and rear directions relative to the track bed compaction machine during compaction work, so that the opposing beaters are always at the same pressure and at the same distance, and are installed at the bottom of the sleepers. To provide a roadbed compaction machine having a compaction device capable of filling and compacting roadbed gravel.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the bed compaction machine of the present invention will be described below with reference to the drawings.

FIG. 4 is a front view schematically showing an embodiment of the present invention.

In the figure, the bed compaction machine includes a compaction device 31, a vertical movement device 63, a longitudinal movement device 64, and a balance device 65.

The compaction device 31 is composed of a vibrator 32, a prime mover 33, beaters 2, 2', and a beater opening/closing device 34. ′.
The beater opening/closing device 34 is attached to the lower part of the vibrating section 32 and includes a hydraulic motor 35 and a screw shaft 36. The screw shaft 36 has the left and right screws oriented in different directions with respect to the hydraulic motor 35, and the beaters 2 and 2' are screwed onto each screw via a feed nut (not shown). By reversing the hydraulic motor 36, the beaters 2, 2'
can be opened and closed.

The vertical movement device 63 includes a vertical movement guide rod 42 fixed to the frame 43, and a vertical movement hydraulic cylinder 37 fixed to the vertical movement guide rod 42 by a mounting arm 40. The vibration generating part 32 is mounted on a mounting seat 3 provided on the upper part of the vibration generating part 32.
8 to a piston rod 39 of a hydraulic cylinder 37 for vertical movement. Further, the vibration generating part 32 is provided with a vertical movement guide part 41, and this vertical movement guide part 41 is fitted into the vertical movement guide rod 42 so as to be slidable in the vertical direction. Therefore, by operating the vertical movement hydraulic cylinder 37, the tightening device 31 can be moved in the vertical direction along the vertical movement guide rod 42.

The longitudinal movement device 64 includes a hydraulic cylinder 47 for longitudinal movement whose opposite side of the piston rod 48 is connected to a seat 61 fixed to the vehicle body 55 of the roadbed compaction machine, and a guide rod for longitudinal movement whose one end is fixed to the vehicle body 55. 46
It is composed of. The forward and backward movement guide section 44 provided on the upper part of the frame 43 is slidably fitted into the forward and backward movement guide rod 46, and
The mounting seat 45 provided at the top of the frame 43 is
Piston rod 4 of hydraulic cylinder 47 for longitudinal movement
It is connected to 8. Therefore, when the hydraulic cylinder 47 for longitudinal movement is operated, the tightening device 31 and the vertical movement device 63 together with the frame 43 can be moved longitudinally in the longitudinal direction of the vehicle body 55 along the guide rod 46 for longitudinal movement. .

The balance device 65 is composed of a directional control valve 49 and a pilot switching valve 52. Then, the connection ports 50, 5 of the hydraulic cylinder 47 for longitudinal movement
0' is connected to the cylinder port of the direction control valve 49 by pipes 51 and 51', respectively, and is connected to the hydraulic motor 35 of the beater opening/closing device 34 of the tightening device 31.
Suction port 53 when beaters 2, 2' are closed
A pipe 62 branching from the oil supply pipe 54 is connected to a pilot port 56 of the pilot switching valve 52. Therefore, when the oil pressure in the oil supply pipe 54 reaches a certain level, that pressure acts on the pilot port 56 of the pilot changeover valve 52 through the pipe 62, and the position 58 of the all port block is switched to the position 57, causing the block to move. Connection port 5 of hydraulic cylinder 47 for
0 and 50' are connected to the tank side, the hydraulic cylinder 47 for longitudinal movement becomes free because the piston side and the rod side are equal to atmospheric pressure.

With the above configuration, the compaction device 31 is lowered by operating the vertical hydraulic cylinder 37, and plunged into the road bed gravel 4 while vibrating the beaters 2, 2', and the beater opening/closing device 34 lowers the compaction device 31. When the beaters 2, 2' are closed so as to sandwich the sleeper 1, the pressure in the oil supply pipe 54 connected to the suction port 53 of the hydraulic motor 35 gradually increases.
When a certain set pressure is reached, the pressure acts on the pilot port 56 of the pilot switching valve 52 through the pipe 62, and as described above, the position of the pilot switching valve 52 is changed and the moving hydraulic cylinder 47 is freed. Therefore, the center line A-A' of the sleeper 1 and the center line D-D' of the beaters 2 and 2' do not match, and for example, the beater 2 is closer to the sleeper 1 than the beater 2'.
If it is close to , the resistance force applied to the beater 2 will be larger than the resistance force applied to the beater 2' as described above, so the compaction device 31 will have an arrow 60 around its center of gravity.
receives a rotational moment in the direction of arrow 59
move along the forward and backward movement guide rod 46 in the direction of
The center line A-A' of the sleeper 1 and the center line D-D' of the beaters 2, 2' are always made to coincide. Therefore, the compacting device 31 can always compact the sleepers 1 with equal pressure and equal distance.

Further, according to the present invention, the compaction device 31 is moved in the longitudinal direction of the rail by the hydraulic cylinder 47 for longitudinal movement, one sleeper at a time, over the intervals between a plurality of sleepers, and compacted with equal pressure and equal distance. can also be done automatically.

As described above, according to the present invention, the hydraulic cylinder for longitudinal movement of the longitudinal movement device is automatically freed by the balancing device only when the compaction device performs compaction work, and compaction at equal pressure and distance is achieved. Therefore, the compaction of the track bed can be automatically and uniformly performed at all times without moving the sleepers to be compacted.

[Brief explanation of the drawing]

Figure 1 is a front view showing correct compaction of the roadbed, Figure 2 is a front view schematically showing an example of a conventional compaction device, and Figure 3 is a schematic diagram of another example of a conventional compaction device. Front View, FIG. 4 is a front view of one embodiment of the present invention. 1... Sleeper, 2, 2'... Beater, 31... Compacting device, 34... Beater opening/closing device, 37... Vertical hydraulic cylinder, 41... Vertical movement guide section, 42
... Guide rod for vertical movement, 44 ... Guide section for forward and backward movement, 46 ... Guide rod for forward and backward movement, 47 ... Hydraulic cylinder for forward and backward movement, 49 ... Direction control valve, 52 ...
...Pilot switching valve, 55...Vehicle body, 56...Pilot port, 63...Vertical movement device, 64...
...Back and forth moving device, 65...Balancing device.

Claims (1)

[Claims] 1. In a roadbed compaction machine that runs on rails and compacts roadbed gravel at the bottom of sleepers, vibrations are transmitted from a vibrating part to the vibrating part, and there is a machine that can be opened and closed and that faces the longitudinal direction of the rail. a compaction device having an attached beater; a vertical movement device that engages with the compaction device and moves the compaction device in a vertical direction; and a vertical movement device that engages with the compaction device and the vertical movement device, and A back-and-forth moving device moves both the tightening device and the up-and-down moving device in the front-back direction; When compacting the road bed gravel at the bottom of the sleepers by restricting movement, the compaction device is free to move in the longitudinal direction via the longitudinal movement device, and the center line of the opposing beater and its lower part are moved freely. A road bed compaction machine characterized by having a balancing device that always aligns the center line of sleepers to be compacted with road bed gravel.