JP2790058B2 - Roller finisher - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roller finisher for leveling a pavement surface of concrete or the like.

[0002]

2. Description of the Related Art Conventionally, a roller finisher of this type has a pair of long front and rear compaction rollers arranged side by side along the longitudinal direction of a vehicle body frame, and rotates these compaction rollers to form a pavement surface such as concrete. Are flattened, but the roller rollers are rotated synchronously during the compaction traveling to make the roller finisher travel straight. However, the pavement surface before rolling is not formed as a uniform flat surface, and the roller finisher may slightly turn left or right due to the unevenness of the pavement surface. As described above, when the roller finisher is curved, the roller finisher has no steering means for changing the direction, and therefore, it is difficult to correct the direction of the roller finisher. For this reason, JP-A-58-218503 discloses that
Rollers that can run along the reference rail by laying parallel reference rails on both sides of the pavement surface, arranging a pair of left and right auxiliary rollers on both sides of the body frame, and running these auxiliary rollers on the reference rail. A finisher has been proposed.

[0003]

However, in the conventional roller finisher that runs on a reference rail parallel to both sides of the pavement surface, the roller finisher can run along the reference rail by using the parallel reference rail. The left and right reference rails must be laid so as to maintain parallelism with each other. Not only is the work of laying the reference rails complicated, but also the width of the pavement rollable pavement surface is, of course, parallel. Within the range of the reference rail, such a restriction on the reference rail limits the width of the pavement surface that can be pavement compacted, and is not suitable for the compaction of a wide pavement surface.

[0004] Therefore, as a roller finisher capable of rolling compacted pavement on a wide pavement surface and running straight, a reference rail is laid on one side of the pavement surface, and the reference rail is provided only outside the body frame. A roller finisher in which a pair of front and rear auxiliary rollers that roll on a rail is also known, but when one end of the vehicle body frame is supported by such a single reference rail, rotation of the pressure roller as described above. When the roller finisher turns left or right, the auxiliary roller easily comes off the reference rail, and the effect of correcting the direction by the reference rail is low.

Accordingly, the present invention provides a roller finisher in which one end of a vehicle body frame is supported on a reference rail laid on one side of a pavement surface, and the direction of the roller finisher can be corrected along the reference rail. The purpose is to:

[0006]

According to the present invention, a first roller and a second roller are supported on a vehicle body frame in parallel, and the roller finisher is caused to travel straight by the rotation of both rollers. In a roller finisher for rolling a pavement surface, a reference rail is laid on one side of the pavement surface, and a pair of front and rear auxiliary rollers for rolling on the reference rail are provided on the outside of the vehicle body frame so as to be able to move up and down. A hydraulic pump for providing a first hydraulic motor for driving the first and second pressure rollers and a second hydraulic motor for driving the auxiliary rollers, and for supplying oil to the first and second hydraulic motors via a hydraulic passage And a flow rate adjusting means for adjusting the flow rate of oil to the first and second hydraulic motors in the hydraulic passage to differentially rotate the first and second pressure rollers and the auxiliary roller. Those were.

[0007]

In the roller finisher of the present invention, a pavement material such as concrete is laid, and a reference rail is laid outside the pavement surface. Then, the height of the auxiliary rollers juxtaposed to the vehicle body frame is adjusted so that the auxiliary rollers are in contact with the reference rail. Thereafter, the first hydraulic motor drives the first hydraulic motor.
And the second roller is rotated to compress the pavement surface.
On the other hand, the auxiliary roller is caused to travel along the reference rail by the second hydraulic motor. In this way, the roller finisher is advanced to perform rolling traveling on the pavement surface.In general, the auxiliary roller and the rolling roller are synchronously rotated during the rolling traveling, but the roller finisher is either left or right. When the vehicle turns to the first position, the flow rate of the oil supplied to the first hydraulic motor driving the first and second pressure rollers and the second hydraulic motor driving the auxiliary roller is selectively adjusted by the flow rate adjusting means. , And the direction of the roller finisher is corrected by differentially rotating the pressure roller and the auxiliary roller.

[0008]

Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 3 show one embodiment of the present invention,
In FIG. 1, reference numeral 1 denotes a vehicle body frame which is an outer frame of a roller finisher. On the inner surface side of the vehicle body frame 1, first rolling members each having the same diameter and the same size are formed along the longitudinal direction of the vehicle body frame 1. The pressure roller 2 and the second pressure roller 3 are pivotally supported in parallel. Further, an eccentric roller 4 which is slightly eccentric and is supported by the vehicle body frame 1 is axially supported in front of the second pressure roller 3. Rotate to compact the pavement surface of concrete etc. to make it flat.

On one side edge of the body frame 1, a U-shaped frame body 6 is erected, and a bearing 8 for vertically supporting a screw rod 7 is welded to the outer surface of the frame body 6. . An elevating rod 10 that moves up and down by a handle 9 integrally provided on the upper part of the screw rod 7 is screwed to the screw rod 7,
On the other hand, upper ends of a pair of front and rear arms 12 are rotatably supported on a vertical portion of the frame body 6. Are linked by And the arm 12
An auxiliary roller 13 running on a rail R laid on one side of the pavement surface is supported at the lower end of the shaft.

An engine 17 for driving two hydraulic pumps 15 and 16 is mounted on the vehicle body frame 1. One of the hydraulic pumps 15 is provided with the pressure rollers 2 and 3 and the auxiliary roller 13.
To the first and second hydraulic motors 18 and 19 for driving the eccentric roller 4 and the third hydraulic motor 20 for driving the eccentric roller 4 from the other hydraulic pump 16. In order to transmit the rotations of these hydraulic motors 18, 19, 20 to the rollers 2, 3, 4, 13, as shown in FIG.
Sprockets 21 are coaxially fixed to the roller shafts 3, 4, 13 and the motor shafts of the hydraulic motors 18, 19, 20, respectively.
A sprocket 21A is rotatably mounted on a pivot 12A that supports the arm 12 of the auxiliary roller 13. And these sprockets 21, 21A are connected by an endless chain 22,
The driving force of the first hydraulic motor 18 is transmitted to the first and second pressure rollers 2 and 3 to rotate the first and second pressure rollers 2 and 3 synchronously in the same direction. The driving force of the second hydraulic motor 19 is transmitted to the two auxiliary rollers 13 to rotate these auxiliary rollers 13 in the same direction as the first and second pressure rollers 2 and 3. The driving force of the hydraulic motor 20 is transmitted to the eccentric roller 4. A chain 22 connecting the first and second pressure rollers 2 and 3 and a chain 22 connecting the pivot 12A of both arms 12 for supporting the auxiliary roller 13 and the motor shaft of the hydraulic motor 19 are connected to the relay sprocket. twenty one
B and the eccentric roller 4 is rotated in the opposite direction to the other pressure rollers 2 and 3 and the auxiliary roller 13.

Next, the above hydraulic circuit will be described with reference to FIG. First, a first hydraulic motor 18 that drives the pressure rollers 2 and 3, a second hydraulic motor 19 that drives the auxiliary roller 13, and a hydraulic pump that feeds oil to these first and second hydraulic motors 18 and 19 The 15 hydraulic circuits 説明 will be described. The first and second hydraulic motors 18 and 19 have first and second inlets respectively.
The other ends of the first and second hydraulic passages 30A and 30B are connected to each other via flow control valves 31A and 31B as flow control means. The communication passage 32 is connected to the A port of the manual switching valve 33 for three-position switching. The discharge side of the hydraulic pump 15 is connected to the B port of the switching valve 33, and by operating the switching valve 33, the hydraulic pump 15 is connected to the first and second hydraulic motors 18 and 19 via the flow control valves 31A and 31B. Send oil. Also, the third and fourth hydraulic motors 18 and 19 have outlets respectively.
One ends of the hydraulic passages 30C and 30D are connected, and the other ends of the third and fourth hydraulic passages 30C and 30D are joined and connected to the C port of the switching valve 33. It is connected to an oil tank. By the switching operation of the switching valve 33, the port A and the port B are moved when the roller finisher advances.
The port is communicated with the C port and the D port, and when the roller finisher is retracted, the A port and the D port are communicated and the B port and the C port are communicated.

Next, the hydraulic circuit の of the third hydraulic motor 20 for driving the eccentric roller 4 will be described. One end of a fifth hydraulic passage 36 is connected to the inflow port of the third hydraulic motor 20,
The other end of the fifth hydraulic passage 36 is connected to an E port of a two-position switching electromagnetic open / close switching valve 38 via an adjustment valve 37,
The discharge side of the hydraulic pump 16 that supplies hydraulic pressure to the third hydraulic motor 20 is connected to the F port of the switching valve 38. A sixth hydraulic passage 39 connected to the G port of the open / close switching valve 38 is connected to the outlet of the hydraulic motor 20, and the H port of the open / close switching valve 38 is connected to the oil tank 34.
Then, the F port and the E port of the open / close switching valve 38 are communicated,
The third hydraulic motor 20 is controlled by the hydraulic pump 16 via the regulating valve 37.
To stop the rotation of the hydraulic motor 20
The hydraulic pressure from the hydraulic pump 16 is returned to the oil tank 34 by connecting the F port and the H port of the open / close switching valve 38 to close the hydraulic passages 36 and 39. Reference numeral 40 shown in FIG. 3 is a relief valve, and reference numeral 41 shown in FIG. 1 is a water tank 41 and 42 is a water pump.

Next, the operation of the above configuration will be described.

First, a pavement material such as concrete is laid, and a reference rail R is laid outside the pavement surface. The handle 9 mounted on the frame 6 is rotated to adjust the height of the lifting rod 10 screwed to the screw rod 7 so that the auxiliary roller 13 contacts the reference rail R. Set 13 Engine 17 in this state
Is started to compress the pavement surface.
Switches the oil supply from the hydraulic pump 15 to the first and second hydraulic motors 18 and 19 via the flow rate adjustment valves 31A and 31B, while the open / close switching valve 38 operates the adjustment valve from the hydraulic pump 16
A switching operation is performed so that oil is supplied to the third hydraulic motor 20 via 37. Then, each hydraulic pump 15, 16 by the engine 17 is used.
, The first to third hydraulic motors 18, 19, 20 rotate, and the rotation is transmitted through the chain 22, whereby the first hydraulic motor 18 causes the two pressure rollers 2, 2 to rotate.
3 rotates, the auxiliary roller 13 rotates by the second hydraulic 19 motor, and the eccentric roller 4 on the front side in the traveling direction rotates by the third hydraulic motor 20. Note that both the pressure rollers 2 and 3 and the auxiliary roller 13 rotate in the same direction, but the eccentric roller 4 includes the respective pressure rollers 2 and 3 and the auxiliary roller 13.
And rotate in the opposite direction. At this time, the rotation speeds of the pressure rollers 2 and 3 and the auxiliary roller 13 are approximately 17 rpm, and the rotation speed of the eccentric roller 4 is approximately 273 rpm. And the eccentric roller 4
The pavement surface is compacted by the eccentric rotation of, and the pavement surface is spread by rolling the pavement surface by the rolling rollers 2 and 3.

As described above, the roller finisher is advanced to perform the rolling operation on the pavement surface, and the auxiliary roller 13 traveling on the rail R during the rolling operation normally rotates in synchronization with the rolling rollers 2 and 3. When the roller finisher bends to the left or right,
And the first and second hydraulic motors 1 for driving the auxiliary rollers 13
By selectively controlling the flow rate of the oil fed to the first and second hydraulic motors 8 and 19 by the flow control valves 31A and 31B, respectively, the rotation speeds of the first and second hydraulic motors 18 and 19, and consequently the pressure rollers 2, 3 By changing the rotation speed of the auxiliary roller 13 and the differential rotation, if the roller finisher turns outward (rail side), the rotation speed of the auxiliary roller 13 is increased,
Alternatively, the number of rotations of the pressure rollers 2 and 3 is suppressed to relatively increase the rotation speed of the auxiliary roller 13 on the outer side (rail side), and conversely, the roller finisher turns inward (paved surface side). In such a case, by relatively lowering the rotation speed of the auxiliary roller 13, the direction of the roller finisher can be corrected so as to proceed straight. The flow control valves 31A and 31B are used not only for correcting the direction of the roller finisher but also for adjusting the speed of the roller finisher. In addition, the number of rotations of the eccentric roller 4 for compacting the pavement surface can be adjusted by controlling the flow rate of the oil flowing through the third hydraulic motor by the adjusting valve 37, similarly to the rollers 2, 3, and 13. .

In this way, when the roller finisher is linearly advanced and the pavement surface is spread and leveled, and then the roller finisher is retracted, the switching valve 33 is manually switched to operate the first and second hydraulic motors. 18 and 19 are rotated in the opposite direction to the forward movement, while the open / close switching valve is
38, the oil supply to the third hydraulic motor 20 is stopped, and the rotation of the eccentric roller 4 is stopped. Then, the rotation of the pressure rollers 2 and 3 causes the roller finisher to retreat. At the time of retreat, as described above, the first and second hydraulic motors are controlled by the flow control valves 31A and 31B.
By selectively adjusting the flow rate of the oil supplied to the rollers 18 and 19, the direction can be corrected as in the case where the roller finisher advances.

As described above, the present invention provides the first and second hydraulic motors 18, 18 for driving the pressure rollers 2, 3 and the auxiliary roller 13.
The flow rate of the oil fed to 19 is selectively controlled by flow control valves 31A and 31B, respectively, and the rotation speed of the auxiliary roller 13 running on the reference rail R laid on one side of the pavement surface is determined by the pressure roller 2 , 3, the direction can be corrected along one reference rail R laid on one side of the pavement surface.

Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments.
Various modifications can be made within the scope of the present invention.
For example, means for transmitting rotation from the auxiliary roller, the lifting mechanism, or each hydraulic motor to each roller may be appropriately set. Further, the eccentric roller can be omitted. Further, the flow rate adjusting valve for adjusting the flow rate of oil to the first and second hydraulic motors is applicable not only to manual operation but also to various types such as switching by an electromagnetic valve.

[0019]

According to the present invention, a first compaction roller and a second compaction roller are supported on a vehicle body frame in parallel, and the rotation of the two compaction rollers causes a roller finisher to travel straight to move the pavement surface. In the roller finisher for rolling, a reference rail is laid on one side of the pavement surface, and a pair of front and rear auxiliary rollers for rolling on the reference rail are provided on the outside of the body frame so as to be able to move up and down, and the first and the second are provided. 2
A first hydraulic motor for driving the roller and a second hydraulic motor for driving the auxiliary roller, and a hydraulic pump for supplying oil to the first and second hydraulic motors via a hydraulic passage. The hydraulic passage is provided with flow rate adjusting means for adjusting the flow rate of oil to the first and second hydraulic motors to differentially rotate the pressure roller and the pressure roller, thereby providing a pavement surface. It is possible to provide a roller finisher in which the direction of the roller finisher can be easily corrected along the reference rail on the reference rail laid on one side.

[Brief description of the drawings]

FIG. 1 is a front view of a roller finisher showing one embodiment of the present invention.

FIG. 2 is a plan view of the roller finisher according to the first embodiment;

FIG. 3 is a hydraulic circuit diagram of the roller finisher according to the first embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Body frame 2, 3 Pressure roller 13 Auxiliary roller 18 1st hydraulic motor 19 2nd hydraulic motor 30A 1st hydraulic path 30B 2nd hydraulic path 31A, 31B Flow control valve (flow control means) R rail

Claims (1)

(57) [Claims] A first pressure roller and a second pressure roller mounted on a body frame;
In a roller finisher that supports a rolling roller in parallel and rolls a roller finisher straight by the rotation of the two rolling rollers, a reference rail is laid on one side of the pavement surface. A pair of front and rear auxiliary rollers for rolling on rails are provided on the outside of the body frame so as to be able to move up and down, and a first hydraulic motor for driving the first and second pressure rollers and a second for driving the auxiliary rollers. And a hydraulic pump for supplying oil to the first and second hydraulic motors through a hydraulic passage. The hydraulic passage is configured to supply a flow rate of oil to the first and second hydraulic motors. A roller finisher provided with flow rate adjusting means for adjusting and differentially rotating the pressure roller and the auxiliary roller.