JPH0543004B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a rolling compaction device that compacts the road by rolling it with rolling wheels while traveling on a road surface formed in an arbitrarily uneven shape.

<Prior Art> A compacting device has a plurality of driving wheels and driven wheels, and while traveling, the driving wheels and driven wheels compact the road surface by rolling it according to the shape of the road surface.

By the way, the drive wheels are designed to rotate around a rotating shaft extending in the width direction of the vehicle. Further, each of the driven wheels is formed to be freely movable in the direction of the rotation radius, and is freely attached to a swing shaft extending in the longitudinal direction of the vehicle. Each driven wheel is moved or swung according to the shape of the road surface by a hydraulic cylinder or the like based on a control signal from a control device.

<Problems to be Solved by the Invention> However, such conventional rolling devices have the following problems when rolling any uneven road surface.

In other words, in the case of a drive wheel, since the drive wheel rotates around a rotating shaft extending in the width direction of the vehicle, the road surface becomes uneven in a plane substantially perpendicular to the direction of travel of the rolling device. However, there was a problem in that the road surface could not be compacted to accommodate the unevenness.

In addition, in the case of driven wheels, the shape of the road surface is detected by a sensor, and based on this detected value, a hydraulic cylinder or the like is used to control the driven wheel to respond to the unevenness of the road surface, so multiple devices are used. This also led to high manufacturing costs and maintenance problems.

The present invention was made in view of the above-mentioned circumstances, and an object of the present invention is to provide a rolling device that can adapt rolling wheels (driving wheels, driven wheels) to unevenness of the road surface with a simple configuration. do.

<Means for Solving the Problems> For this reason, the present invention provides a drive wheel and a driven wheel, which are compaction wheels that move on a compaction surface and roll and compact the compacted body, on the vehicle body. In a compaction device prepared for , a drive wheel support device is provided which supports the drive wheels freely in a plane substantially perpendicular to the direction of travel of the vehicle, and a plurality of the driven wheels are arranged in parallel in the width direction of the vehicle, and the driven wheels are mutually connected. a movable support device that supports independently and freely to move in a direction away from the rolled and pressed body, and a regulating device that regulates the amount of movement of each driven wheel so that the rolling force of each driven wheel is approximately the same. and a tilting support device that supports each of the driven wheels independently of each other so as to be tiltable by a predetermined amount in a plane substantially perpendicular to the vehicle traveling direction.

<Function> Even if the pressed body is formed into an uneven shape in a plane that is substantially orthogonal to the vehicle traveling direction, each pair of drive wheels swings independently and both of them touch the road surface. I come to do it. Therefore, the drive wheels can compact the road surface by rolling it into the road surface shape immediately before compaction. Furthermore, since each pair of driving wheels can be swung independently, the attitude of the vehicle body can be stabilized without greatly changing its attitude. The driven wheels then further compact the road surface. At this time, each driven wheel is independently supported to freely move up and down, and the up and down movement is regulated, so that the rolling force of each driven wheel can be made substantially the same. Furthermore, since each driven wheel is independently supported so as to be tiltable, each driven wheel is tilted so as to be substantially perpendicular to the road surface. Therefore, even with the driven wheels, it is possible to sufficiently roll and compact the road surface so as to obtain the road surface shape immediately before rolling.

<Example> An example of the present invention will be described below based on FIGS. 1 to 11.

1 to 4, a driven wheel device 2 is provided at the lower front end of the vehicle main body 1, while a driving wheel device 3 is provided at the lower rear end of the vehicle main body 1. Further, a driver's seat 4 is provided at the upper rear end of the vehicle body 1.

As shown in FIG. 6, a first swinging member 5 is attached to the front end of the vehicle body 1 so as to be able to swing freely around a substantially vertical axis. Two swinging members 6 are attached to be able to swing freely around a substantially horizontal axis. The driven wheel device 2 is attached to the second swinging member 6.

As shown in FIGS. 5 and 6, the driven wheel device 2 is provided with a frame 7 to which the second swinging member 6 is attached. Thereby, the driven wheel device 2 is configured to be able to swing freely around the axis of the second swinging member 6 within a substantially vertical plane formed in the vehicle width direction.
Further, the first swinging member 6 swings around a substantially vertical axis in response to a steering operation of a handle 8 provided on the driver's seat 4, and rotates the frame 7 around the axis of the first swinging member 6. The steering control of the device can be performed by swinging it around.

The driven wheel device 2 includes a plurality of driven wheels 9, 10,
11 are arranged at approximately constant intervals along the vehicle width direction. A horizontal frame 12 extending in the longitudinal direction of the vehicle and a vertical frame 13 extending in the width direction of the vehicle are attached to the lower end of the frame 7.

At the top of the frame 7, as shown in FIGS. 5 and 6, a plurality of vertically movable members 14, 15, 1 are provided.
6 are attached, and these vertically moving members 14, 15,
At the lower end of 16, a support frame 17 with an open lower end,
18 and 19 are attached respectively. Each of the support frames 17, 18, and 19 is supported by a pair of guide members 20 attached to the frame 7 so as to be freely movable diagonally up and down, as shown in FIG. Here, the frame 7 and the vertically moving member 1
4, 15, 16 and support frames 17, 18, 19
constitutes a moving support device.

A rotary shaft 21 is attached to the lower end of each of the support frames 17, 18, 19 so as to extend in the width direction of the vehicle and can rotate freely. 9, 10, and 11 are rotatably attached. Here, each of the driven wheels 9, 10, 11 is supported by the spherical bearing 22 so as to be tiltable by a predetermined amount with respect to the rotating shaft 21. Therefore, the rotating shaft 21 and the spherical bearing 22
constitutes a support device for tilting.

A bracket 23 is mounted on the upper wall of the frame 7 between the vertically movable members 14, 15, 16, and sprockets (not shown) are rotatably mounted on each of the brackets 23. Further, each of the vertically moving members 14, 15, 16
A sprocket 24 is rotatably attached to the upper end of each sprocket. Further, one end of a connecting chain 25 serving as a regulating device is attached to one side of the frame 7, and the other end of the connecting chain 25 is rotatably attached to the other end of the frame 7 by a mounting member 26. It is installed through. The middle part of the connecting chain 25 is connected to the vertically moving members 14, 15, 16.
Vertical movement member 14,1 to restrict the upward movement of
5, 16 sprocket 26 and bracket 23
It is meshed with the sprocket.

Next, to explain the drive wheel device 3, as shown in FIG. 4, the drive wheel device 3 has a pair of rear support brackets 27 extending downward from the rear end of the vehicle frame 1 in the vehicle width direction. They are provided at a predetermined distance. A first support member 28 is provided at the lower end of each of the rear support brackets 27 and extends in the longitudinal direction of the vehicle. In addition, the rear support bracket 27
A pair of front support brackets 29 are attached to the vehicle body 1 at the front of the vehicle, and each front support bracket 29 has a second support member 30 coaxial with the first support member 28 and extending in the longitudinal direction of the vehicle. installed and installed respectively.

A pair of support frames 31 are provided, each consisting of a pair of front and rear frames 31a extending in the vehicle interior direction and a pair of left and right frames 31b extending in the vehicle front and rear direction. They are attached to the first and second support members 28 and 30, respectively, so as to be able to swing freely. In addition, each support frame 3
Rotating shafts 32 are installed in the intermediate portions of the left and right frames 31b of No. 1 so as to extend in the vehicle width direction and are freely rotatable, and on these rotating shafts 32, two sets of one-on-one driving wheels as rolling wheels are mounted, namely, , drive wheels 33, 34 and drive wheels 35,
36 are attached respectively. The two sets of drive wheels 33, 34 and drive wheels 35, 36 are attached to the rotating shaft 32 so as to be approximately symmetrical to the swing axes of the first and second support members 28, 30. Therefore, the support frame 31 is configured to swing by a predetermined angle θ about the first and second support members 28 and 30 in a plane substantially perpendicular to the direction of travel of the vehicle. A first sprocket 37 is attached to the rotating shaft 32. On the other hand, brackets 38 are attached to the front and rear frames 31a of each of the support frames 31.
Transmission shafts 39 are rotatably attached via a and 38b, respectively, and a second sprocket 40 is attached to these transmission shafts 39. Between these first and second sprockets 37 and 40 is a first chain 4.
1 is wound.

A third sprocket 42 is attached to each of the transmission shafts 39, and these third sprockets 42 and a prime mover (not shown) provided on the vehicle frame 1 are connected to each other.
A second chain 44 is wound between the second chain 44 and a fourth sprocket 43 attached to the output shaft of the second chain 44. A tension device 45 for adjusting the tension of the second chain 44 is provided in the middle of the second chain 44 .

This tension device 45 is provided with a support shaft 46 attached to the vehicle body 1, as shown in FIGS. is installed so that it can swing freely. The first and second arms 47, 4
At one end of 8 there is a tension sprocket 49,
50 is rotatably attached, and these tension sprockets 49, 50 are connected to the second chain 4.
4 is engaged from the outside. Further, a spring 51 for forming tension is provided across the other end portions of the first and second arms 47, 48.

The elastic force of the spring 51 urges the sprockets 49 and 50 toward the second chain 44, so that a substantially constant tension is always applied to the second chain 44. Also,
The support frame 31 is tilted around the center of the second sprocket 40 (O in FIG. 11), so that the third sprocket 42 is tilted around the center of the second sprocket 40 ( _O in FIG. 11).
When moving downward from the point to the _O2 point, the tension of the second chain 44 tends to increase. At this time, the tension causes the tension sprocket 49,
50 are moved apart against the elastic force of the spring 51, and the tension of the second chain 44 is kept substantially constant.

Here, the driving wheels 33, 34, 35, and 36 are arranged offset in the vehicle width direction with respect to the arrangement positions of the driven wheels 9, 10, and 11, as shown in FIG.

Next, the operation will be explained with reference to FIGS. 12 and 13. The explanation will be given by taking an asphalt pavement layer as an example of the compacted body.

First, an asphalt pavement material is spread on the roadbed A using a paving device such as an asphalt finisher to form an asphalt pavement layer B having a desired uneven road surface.

Thereafter, as shown in FIG. 12, the rolling device is moved backward, and the driving wheels 33, 34, 35, 36 and the driven wheels 9, 10, 11 are rolled, and the asphalt pavement layer B is rolled and tightened. Harden.

At this time, if the road surface perpendicular to the longitudinal direction of the vehicle is formed in an uneven shape as shown in FIG. The second support members 28 and 30 are oscillated so that both of them come into contact with the road surface. Therefore, the driving wheels 34, 35, 36,
37, it is possible to compact the road surface by rolling it into the shape of the road surface just before it was compressed. Also, 2
Since each set of drive wheels 33, 34 and drive wheels 35, 36 can be swung independently, the attitude of the vehicle body can be stabilized without greatly changing its attitude. In addition, drive wheels 33, 34,
Since 35 and 36 are supported so as to be able to swing freely, there is no need for a sensor for detecting the shape of the road surface, a swinging device such as a hydraulic cylinder, etc., and the structure is simplified, thereby reducing costs.

Thereafter, the driven wheels 9, 10, and 11 further compact the road surface. At this time, each driven wheel 9,
10 and 11 are attached to the frame 7 so that they can move up and down independently, and their up and down movement is restricted by the connecting chain 25. Therefore, the same restricting force acts on each other through the connecting chain 25. The driven wheels 9, 10, 11 move up and down until they touch the road surface as shown by the broken lines in FIG. The rolling forces of the driving wheels 9, 10, and 11 can be made substantially the same. Further, since each of the driven wheels 9, 10, 11 is independently attached to a spherical bearing 22 so as to be tiltable with respect to the rotating shaft 21, each of the driven wheels 9, 10, 11
0 and 11 are tilted so as to be substantially perpendicular to the road surface, as shown by the broken line in FIG.

Therefore, even with the driven wheels 9, 10, 11, it is possible to sufficiently roll and compact the road surface into the shape just before rolling with a simple configuration. In addition, the driven theory 9, without installing sensors, hydraulic cylinders, etc.
Since 10 and 11 are tilted, costs can also be reduced.

In this embodiment, asphalt pavement has been described, but the present invention may also be used for rolling compaction of concrete pavement, roadbeds, roadbeds, etc. Further, instead of the connecting chain 25, a linear member such as a wire may be used.

<Effects of the Invention> According to the present invention, a plurality of sets of adjacent drive wheels are arranged side by side in one-on-one pairs, and for each set of drive wheels, a support member is installed at the middle part of the position where the pair of drive wheels are arranged side by side. Since the structure is such that it can be supported freely in a plane substantially perpendicular to the direction of travel of the vehicle, the drive wheels can compact the road surface by compacting it into the road surface shape immediately before compaction. In particular, since each pair of driving wheels can be swung independently, the attitude of the vehicle body can be stabilized without greatly changing its attitude. Further, a plurality of driven wheels are arranged in parallel in the width direction of the vehicle, and each driven wheel is supported independently of each other so that it can move freely in a direction away from the pressed body, and the amount of movement of each driven wheel is determined by each driven wheel. The rolling force of each driven wheel is regulated to be approximately the same, and each driven wheel is supported independently of each other so that it can tilt by a predetermined amount in a plane approximately perpendicular to the direction of vehicle travel. Since the rolling forces can be made substantially the same, and the driven wheels are independently supported so as to be tiltable, each driven wheel is tilted so as to be substantially perpendicular to the road surface. Therefore, even with the driven wheels, it is possible to sufficiently roll and compact the road surface so that it assumes the road surface shape immediately before rolling.

[Brief explanation of drawings]

Fig. 1 is a side view of a rolling compaction device showing one embodiment of the present invention, Fig. 2 is a plan view of the same as above, Fig. 3 is a left side view of Fig. 1, and Fig. 4 is a right side view of Fig. 1. Fig. 5 is an enlarged view of the main part of Fig. 4, Fig. 6 is a left side view of Fig. 4, Fig. 7 is an enlarged view of the main part of Fig. 1, and Fig. 8 is an enlarged view of the main part of Fig. 7.
Figure 9 is an enlarged view of the main part of Figure 4.
0 is an enlarged view of the main part of FIG. 1, FIG. 11 is a side view of FIG. 10, and FIGS. 12 and 13 are diagrams for explaining the same operation. 1... Vehicle body, 2... Driven wheel device, 3... Driving wheel device, 9, 10, 11... Driven shaft, 17, 1
8, 19... Vertical moving member, 22... Spherical bearing, 2
5... Connection chain, 28... First support member,
30... second support member, 31... support frame,
33, 34, 35, 36...driving wheels.

Claims (1)

[Claims] 1. A compacting device comprising a driving wheel and a driven wheel, which are compaction wheels that roll on a compacted body and compact the compacted body while rolling on the compacted body, in a vehicle body, in which the driving wheels are adjacent to each other. A plurality of drive wheels are arranged side by side in one-on-one pairs, and each drive wheel of each set is supported by a support member in a plane substantially perpendicular to the direction of travel of the vehicle at the middle part of the position where the pair of drive wheels are arranged side by side. A plurality of driven wheels are arranged in parallel in the width direction of the vehicle, and each of the driven wheels is moved independently from the other in a direction away from the pressed body. A moving support device that supports freely; a regulating device that regulates the amount of movement of each driven wheel so that the rolling force of each driven wheel is approximately the same; A rolling compaction device comprising: a tilting support device that supports the tilting movement by a predetermined amount in a substantially orthogonal plane.