JP2537271Y2 - Compaction equipment for curved pavement - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compaction device for pavement of a curved surface suitable for rolling an inclined curved surface such as a test course.

[0002]

2. Description of the Related Art Conventionally, when paving an inclined curved surface, for example, asphalt is laid with an asphalt finisher and then compacted using a compaction device.
The compaction device performs the compaction operation while running in parallel with the anchor wheel supported by the wire extended from the anchor wheel.

[0003]

As described above, the compaction device can be rolled on an inclined surface by being supported by a wire extended from an anchor vehicle. Since the surface has a special cubic curved surface, the radius of curvature of the curved portion at the buttocks and the curved portion of the shoulder is greatly different, and the radius of curvature changes successively in the traveling direction, so that the surface is compacted to the correct curved surface as designed. Was extremely difficult. In particular, steel rollers have iron wheels,
There is a possibility that the rolling surface of the wheel may not completely match the leveling surface of the asphalt mixture, and there is a problem that an accurate pavement surface cannot be obtained. For this purpose, for example, a device provided with a rolling wheel that follows a curved surface as disclosed in Japanese Patent Application Laid-Open No. 63-7405 is known.

However, the above-mentioned known type is a type in which the right and left wheels are simultaneously displaced by the same amount by a link mechanism in accordance with a curved surface. For example, in a relaxed curve section following a flat surface to an inclined surface, In the case of a compaction condition in which one wheel is on the flat surface side and the other wheel is on the transition curve section side, since the compaction angles are respectively different, one wheel does not properly correspond to the pavement surface, and There is a possibility that a good finished surface cannot be obtained. In some cases, it was necessary to separately perform finishing work only in that area.

Accordingly, an object of the present invention is to provide a compacting device for pavement on a curved surface capable of performing an accurate rolling operation under any rolling conditions.

[0006]

In order to achieve the above object, in the present invention, a pair of left and right wheels is mounted on a vehicle body which is extended from an anchor vehicle and supported by a wire capable of controlling the extension amount. Left and right wheels are rotatably supported by a support frame that can be tilted with the rotation axis as a fulcrum, and rotational power from a drive unit is provided, and correspond to the inclination angle at which the wheels tilt with the wheel rotation axis as a fulcrum. It is possible to expand and contract,
In addition, one end of each of the independently disposed hydraulic devices is connected to the support frame side, and the other end is connected to the vehicle body, while detecting the amount of expansion and contraction of the left and right hydraulic devices or the load applied to each wheel. A sensor is provided, and the feed amount of the wire is controlled based on a detection signal from the detection sensor.

[0007]

According to this compacting device, for example , when the left and right wheels are located in different sections of the left and right slopes, each wheel is
The left and right hydraulic devices expand and contract according to the slope. Left and right oil
The amount of expansion and contraction of the pressure device is detected by a detection sensor and detected.
Based on the detected value of the sensor, control the wire feeding amount,
Control continues until the load imbalanced from side to side stops working
As a result, a uniform ground pressure is always ensured on both the left and right sides, and a good finished surface is obtained.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to FIGS.

FIG. 1 shows the body of the compacting device 3. The fuselage 1 is supported by a wire 9 fed from a hydraulic winch 7 of an anchor wheel 5 running in parallel with the compaction device 3, and the wire 9 is controlled in a feeding amount based on detection signals from detection sensors S 1 and S 2 described later. It is supposed to be.

The body 1 is provided with a pair of left and right front wheels 13 and 13 and rear wheels 15 and 15 which can be tilted about a wheel rotating shaft 11 as a fulcrum.

As shown in FIGS. 4 and 5, the front wheels 13, 13 are flat rolling wheels, and are rotatable about an axle 19 supported by a support frame 17. The rotational power from a drive unit 21 such as a hydraulic motor mounted on the support frame 17 is reduced and transmitted to the axle 19.

The front and rear sides of the support frame 17 are supported at both ends by first support members 23, 23, and the support portion is the wheel rotation shaft 11 that can rotate in the direction of the arrow in FIG. The wheel rotation shaft 11 serving as a support is disposed below the axle 19 of the wheel 13 and faces a wheel axis a passing through the center of the wheel 13.

The first support member 23 is pivotally supported on a second support member 27 fixed to the turntable 25 so as to be rotatable left and right (in the direction of the arrow in FIG. 4) about a pin 29. The turntable 25 is attached to the body 1 so as to be rotatable about a longitudinal axis b, and is rotated by a steering operation by a steering 31 to obtain a predetermined steering angle.

The first support member 23 is controlled by a pair of left and right hydraulic devices 31, 31 so as to be rotatable and lockable left and right (in the direction of the arrow in FIG. 4) around the wheel rotation shafts 11, 11. It has become.

The hydraulic device 31 comprises a piston 31a and a cylinder 31b which can expand and contract in the horizontal direction.
a is pivotally supported by a mounting bracket 33 rising from the support frame 17, and the cylinder 31 b is pivotally supported by a mounting bracket 35 rising from the first support member 23.

On the other hand, as shown in FIG. 3, the hydraulic device 31 for the rear wheels 15 comprises a piston 31a and a cylinder 31b which can expand and contract in the vertical direction, and the piston 31a extends horizontally from the support frame 17. On the mounting bracket 37, the cylinder 31b is pivotally supported by front and rear long strength members 39 fixed to the body 1 respectively.
The support frame 17 is rotatably supported by a mounting portion 41 fixed to the body 1 via wheel rotation shafts 11, 11.

It should be noted that the drive unit 21 has a front wheel 1
3, the same reference numerals are used and the description is omitted.

The hydraulic device 31 includes first, second, third, fourth
Control valve 4 with switching ports P1, P2, P3, P4
The first switching port portion P1 functions to extend the piston 31a by sending hydraulic pressure from the hydraulic pump 45 to the first chamber 31b-1 of the cylinder 31b. The second switching port portion P2 communicates the first and second chambers 31b-1 and 31b-2 of the cylinder 31b with the tank 47, so that the first and second chambers 31b-1, 3
It functions to release the hydraulic pressure of 1b-2 to the tank 47 and secure the expansion and contraction of the piston 31. The third switching port portion P3 returns the hydraulic pressure from the hydraulic pump 45 to the tank 47, and stops the flow of the hydraulic pressure in the first and second chambers 31b-1 and 31b-2 of the cylinder 31b, thereby stopping the movement of the piston 31a. It functions to lock and secure the locked state. The fourth switching port P4 functions to reduce the piston 31a by sending the hydraulic pressure from the hydraulic pump 45 to the second chamber 31b-2 of the cylinder 31b.
Switching to 2, P3 and P4 is controlled by manual operation.

Reference numeral 49 denotes a relief valve for sending the pressure from the hydraulic pump 45 to the tank 47.

On the other hand, the inclination of the front and rear wheels 13 and 15 in the left and right direction is detected by detection sensors S1 and S2, and is mounted on the hydraulic device 31. That is, the detection is performed by detecting the stroke of a piston that expands and contracts in accordance with the inclination of the wheels 13 and 15, and the detection signal is input to a control unit (not shown) that rotates the hydraulic winch 7 forward and backward. It has become so. Thereby, the hydraulic winch 7 is rotated by the detection signals from the detection sensors S1 and S2 so as to feed out the wire 9 when the strokes of the left and right hydraulic devices 31 are L1 <L2, as shown in FIG. This rotation continues until L1 = L2, so that a biased load does not act on the left and right wheels.

In the compacting device 3 configured as described above, first, the control valve 43 is set to the second switching port portion P2,
The hydraulic device 31 is brought into a free state in which the hydraulic device 31 can freely expand and contract, and the body 1 on the inclined surface is supported by the wire 9 drawn out from the anchor vehicle 5 running in parallel. In this case, a component force F of the vehicle body weight W is generated in the body 1 in proportion to the inclination angle θ, but the wires 9 detect the sensors S 1 and S 1 through the hydraulic device 31 that expands and contracts the inclination of the wheels 13 and 15. The hydraulic winch 7 is rotated forward and backward by the detection signal from S2, and the tension Fa of the wire 9 is controlled so that Fa = F. As a result, a component force P perpendicular to the inclined surface acts on the body 1, No. 1 enables traveling under the same conditions as a normal flat ground. Accordingly, the body 1 is not over-tensioned, and a biased load is not applied to one of the wheels.

On the other hand, in the horizontal flat ground area α, the control valve 43 is used as the third switching port portion P3, and the hydraulic device 31 is used in a locked state. Further, in the curved surface inclined region β or the linear inclined region γ, the control valve 43 is set to the second switching port portion P2, and the hydraulic device 31 is used in a free state.
As a result, the front and rear left and right wheels 13 and 15 work properly corresponding to the inclined surfaces.

Note that the detection sensors S1 and S2 may be of a load cell type that detects the degree of inclination of each of the wheels 13, 13, 15, and 15 by detecting distortion based on the left and right loads that change according to the inclination. .

[0024]

[Effect of the invention] As described above, according to the compaction apparatus of this invention, even when the left and right different inclination surface, whereas
The right and left wheels are accurately contacted without any
Since it can be grounded, a good finished surface can be obtained.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view of an entire compaction device according to the present invention.

FIG. 2 is a side view of a compaction device.

FIG. 3 is a rear view of the compaction device.

FIG. 4 is a front view of the compaction device.

FIG. 5 is a schematic plan view on the front wheel side of the compaction device.

FIG. 6 is a hydraulic circuit diagram.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Body (body) 5 Anchor car 9 Wire 11 Wheel rotation shaft 13, 15 Wheel 17 Support frame 21 Drive unit 31 Hydraulic device S1, S2 Detection sensor

Claims (1)

(57) [Scope of request for utility model registration] 1. A vehicle which is extended from an anchor vehicle and supported by a wire whose amount of extension is controllable is rotatably supported by a support frame which can be tilted about a pair of left and right wheel rotating shafts as a fulcrum. Hydraulic devices provided with left and right wheels to which rotational power from the unit is transmitted, capable of expanding and contracting in accordance with the inclination angle at which the wheels incline with the wheel rotation axis as a fulcrum, and independently disposed one end to the support frame side, while coupled to each other end to the vehicle body, left
A fastening sensor for detecting the amount of expansion or contraction of the right hydraulic device or the load applied to each wheel, and controlling the amount of feeding of the wire based on a detection signal from the sensing sensor; Compacting device.