JPH0534444B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a paving material construction device used for roads and the like that use paving materials such as concrete.

<Conventional technology> For example, when constructing roads using concrete, the concrete is leveled and then compacted by applying vibrations to the leveled concrete using a compaction device. . Furthermore, the compacted concrete surface is finished flat using a surface finishing machine.

The compaction device has a plurality of large box-shaped compaction members installed in a direction substantially perpendicular to the direction of movement of the device, and moves forward while vibrating the bottom walls of the compaction members in contact with the concrete surface. to compact the concrete. The bottom wall of the tightening member is formed into a rectangular flat surface.

<Problems to be Solved by the Invention> Incidentally, in the construction of bridges, etc., concrete is sometimes formed into a thin layer, and in this case, relatively short and thin steel or Various reinforcing fibers such as plastics may be mixed into concrete.

However, fiber-reinforced concrete inherently has poor workability, and in particular, for pavement concrete where the amount of water used is limited, sufficient compaction is often not possible with conventional vibratory compaction equipment. For this reason, compaction is performed by increasing the amount of water used to make compaction easier, or by increasing vibration, but the former method cannot reduce the hardening and drying shrinkage of concrete, and Only concrete that is inferior in terms of properties can be produced. The latter requires more powerful equipment, and because it applies strong vibrations, differences in construction speeds tend to cause unevenness on the finished surface. Furthermore, reinforcing fibers with a high specific gravity, such as steel, tend to settle below the paving member due to strong vibrations; conversely, in the case of reinforcing fibers, such as plastic, with a small specific gravity, the aggregate settles and the fibers relatively float. For this reason, unevenness is likely to occur in the finished cross section of the paving material.

Furthermore, since the reinforcing fibers are mixed into the concrete with various orientations, when the conventional compaction device advances the compaction member while simply contacting the concrete surface to compact the concrete, the concrete is Some of the reinforcing fibers may be exposed from the concrete surface before hardening. For this reason, there are problems in that the quality of the concrete pavement is poor and it is dangerous for vehicles to drive, and there is also a problem in that finishing work immediately after compaction is also hindered.

The present invention has been made in view of the above-mentioned circumstances, and provides a paving material construction device that can reliably embed reinforcing fibers such as steel or plastic into the pavement body, even when reinforcing fibers such as steel or plastic are mixed in the pavement body, such as concrete. The purpose is to provide

<Means for Solving the Problems> For this reason, the present invention provides a roughening device for roughly leveling the spread paving material extending in the width direction of the vehicle to a substantially constant height;
A compaction device provided behind the roughening device at a predetermined interval in the vehicle width direction, and comprising a plurality of embedded protrusion members that continuously enter and exit the paving material by a predetermined amount by continuous up and down reciprocating motion. A plurality of fastening devices are arranged adjacently at predetermined intervals in the longitudinal direction of the vehicle, and the embedded protrusion members are provided with positions shifted in the vehicle width direction between the adjacent fastening devices; A vehicle is equipped with a spreading device that is installed behind the compacting device and spreads the paving material compacted by the compacting device to a substantially constant height, and a finishing device that finishes the surface of the spread paving material. Prepared.

<Function> Fiber-reinforced concrete, etc., which is difficult to compact uniformly both in plan and cross-section, can be compacted efficiently and uniformly by the continuous up and down reciprocating movement of the embedded projecting member. did. In addition, reinforcing fibers mixed into the paving material that has been roughly leveled during running are embedded inside the paving material using embedded protrusions to prevent them from being exposed from the surface of the paving body after construction.

<Example> An example of the present invention will be described below based on FIGS. 1 to 14. The paving material will be explained by taking as an example a material in which various reinforcing fibers such as relatively short and thin steel or plastic are mixed into concrete.

First, the overall outline of the pavement construction apparatus will be explained based on FIGS. 1 and 2.

In Fig. 1, a spreader 1 is used as a roughening device for roughly leveling the spread concrete to a substantially constant height.
is provided extending in the width direction of the vehicle, and behind the spreader 1 is provided a compaction device 2 extending in the width direction of the vehicle for compacting the roughly leveled concrete surface. Behind the compacting device 2, a vibrator 3 is provided extending in the width direction of the vehicle as a spreading device for spreading concrete to a substantially uniform height. Further, behind the vibrator 3, a screed 4 is provided extending in the vehicle width direction as a finishing device for finishing the compacted concrete surface into a flat shape.

The spreader 1, the tightening device 2, and the vibrator 3 are suspended and supported by a support frame 5, and the support frame 5 is provided with a plurality of traveling devices 7 that travel on rails 6 and are arranged on both sides of the vehicle.

Further, another traveling device 8 is provided behind the traveling device 7.
are arranged on a pair of rails 6, and a pair of traveling devices 8
are connected by a support frame 9 extending in the width direction of the vehicle. The screed 4 is suspended and supported by the support frame 9. These traveling devices 8 are indexed by the traveling device 7.

Next, the screed 1 will be explained based on FIG. 3. The screed 1 is provided with a rotating shaft 10 extending in the width direction of the vehicle. This rotating shaft 10 has a plurality of unit rotating shafts 11 each having a predetermined length.
The unit rotation shafts 11a, 11b are arranged in the vehicle width direction and are connected to each other.
By appropriately selecting the length of 1b in the vehicle width direction, the total length in the vehicle width direction can be changed.

A large number of plate-shaped dispersion plates 11 are attached to the rotating shaft 10 in a radial or spiral arrangement. These scattering plates 11 are designed to roughly level the concrete to a predetermined width and approximately constant height.

Both ends of the rotating shaft 10 are rotatably supported by the lower ends of screed height adjusting devices 12a and 12b which are screw mechanisms, and the upper ends of these screed height adjusting devices 12a and 12b are attached to the support frame 5. ing. The screed height adjusting devices 12a, 12b are designed to adjust the height of the rotating shaft 10 by rotating handles 13a, 13b. A belt 15 is wound around one end of the rotary shaft 10 and the output shaft of the reducer 14, and the rotary shaft 10 is rotated by the driving force of the hydraulic motor 16 being transmitted to the rotary shaft 10 via the reducer 14. It is becoming driven.

Next, the support frame 5 and traveling device 7 will be explained based on FIGS. 4 and 5.

The support frame 5 includes a plurality of rod-shaped frames 17.
are provided extending in the width direction of the vehicle, and these rod-shaped frames 17 are connected by a connecting frame 18 at both ends thereof. The rod-shaped frame 17 is provided with an intermediate member 17a, and both end members 17b are coaxially attached to both ends of the intermediate member 17a and can be pulled out from the intermediate member 17a. Then, the intermediate member 17 of both end members 17b
By adjusting the amount of protrusion from a, the length of the support frame 5 in the vehicle width direction can be adjusted.

A plurality of frame height adjustment devices 19 each consisting of a screw mechanism are erected on the connection frame 18, and the traveling device 7 is attached to the lower end portions of these frame height adjustment devices 19. As shown in FIG. 1, each traveling device 7 has a pair of wheels 20 rotatably attached thereto. A driven sprocket 21 is coaxially attached to one of the wheels 20, as shown in FIG. Further, a reduction gear 22 is attached above the wheel 20, and a drive sprocket 23 and the driven sprocket 21 of this reduction gear 22 are connected to each other.
A chain belt 24 is wound around. The driving force of the hydraulic motor 25 is transmitted to the wheels 20 via the reducer 22 and the chain belt 24, so that the construction device is driven to run along the rail 6.

Next, the compacting device 2 will be explained based on FIGS. 6 to 10.

In FIG. 6, a pair of tightening height adjusting devices 26 consisting of screw mechanisms are attached to the support frame 5, and the tightening device 2 is suspended and supported at the lower ends of these tightening height adjusting devices 26. There is. The tightening device 2 is provided with a rotating shaft 28 which is rotatably attached to a bracket 27 at the lower end of each tightening height adjusting device 26 and extends in the vehicle width direction.

A cylindrical front eccentric collar 29 is attached to both ends of the rotating shaft 28 so as to be offset by a predetermined amount from the axis of the rotating shaft 28. Front vertically movable members 30 are rotatably attached to these front eccentric collars 29, respectively, and a box-shaped front support member 31 is rotatably rotatable and extends in the width direction of the vehicle at the lower end of these front vertically movable members 30. It is set up and suspended.

Further, a cylindrical rear eccentric collar 32 is attached to the rotating shaft 28 so as to be offset by 180 degrees from the front eccentric collar 29. These rear eccentric collars 32 include
Rear side vertically movable members 33 are attached to each of the rear vertically movable members 33 so as to be freely rotatable, and a rear side support member 34 is freely rotatably extended in the vehicle width direction and suspended from the lower end portions of these rear side vertically movable members 33. There is. Here, the rear support member 3
4 is located at the rear of the vehicle than the front support member 31, and the support members 31 and 34 are arranged substantially parallel to each other. In addition, the front support member 31
and a guide 35 for keeping the gap between them at a constant value so that they do not come into contact with each other.
is attached to the bracket 27.

Embedded projection members 36 are disposed at substantially constant pitches in the width direction of the vehicle and are detachably attached to the lower ends of each of the support members 31 and 34, respectively. As shown in FIG. 10, the embedded protrusion member 36 has an attachment portion 36a to the support members 31 and 34 and a large diameter portion 36.
b and a tapered embedded portion 36c. Here, the attachment position of the embedded protrusion member 36 to the support member 31 is shifted by 1/2 pitch from the attachment position of the embedded member 36 to the rear support member 34, as shown in FIG. ing.

Further, a hydraulic motor 38 and a reduction gear 39 are attached to a bracket 37 attached across the lower end of the compaction height adjustment device 26.
A belt 42 is wound around a pulley 40 and a pulley 41 attached to the rotating shaft 28.

By rotating the rotary shaft 28 with the hydraulic motor 38, the front support member 31 and the rear support member 34 are alternately moved up and down as shown in FIG.

Here, the compaction device 2 includes a compaction height adjustment device 26
By rotating the handle 43, it can be moved up and down.

Next, the vibrator 3 will be explained based on FIGS. 11 to 13.

In FIG. 11, a padding height adjusting device 44 consisting of a screw mechanism is attached to the support frame 5, and a frame 45 is spanned over the lower end of the padding height adjusting device 44 and extends in the vehicle width direction. It has been extended and installed. This frame 745
Brackets 46 are attached to both ends of the bracket. These brackets 46 are shown in FIGS.
As shown in FIG. 3, a box 48 is extended and suspended in the width direction of the vehicle via a vibration isolating rubber 47.

The box 48 has a rotating shaft 49 attached to a support 50.
A plurality of disc-shaped unbalanced weights 51 are mounted on the rotating shaft 49 at appropriate intervals and offset by a predetermined amount from the axis of the rotating shaft 49. Also, box 4
A plurality of vibrator weights 52 are attached to 8 at appropriate intervals, and these vibrator weights 52
supports the rotary shaft 49 in a freely rotatable manner.

A hydraulic motor 53 is attached to the frame 45, and a belt 56 is wound around a pulley 54 attached to the output shaft of the hydraulic motor 53 and a pulley 55 attached to the rotating shaft 49.

When the rotary shaft 49 is rotated by the hydraulic motor 53, the unbalanced weight 51 also rotates, and the inertia of the unbalanced weight 51 causes the box 48 to vibrate and spread concrete.

Further, by rotating the handle 57 of the lining height adjusting device 57, the box 48 can be moved up and down to finely adjust the lining height.

Next, the screed 4 will be explained based on FIG. 14.

The support frame 9 is composed of a rod-shaped frame 58 extending in the width direction of the vehicle, and a frame height adjustment device 59 consisting of a screw mechanism attached to both ends of the rod-shaped frame 58. The traveling device 8 is attached to the lower end of the vehicle. The rod-shaped frame 58 has an intermediate member 5.
8a is provided, and both end members 58b are in the shape of a moving shaft at both ends of the intermediate member 58a, and the intermediate member 58a
It is installed so that it can be pulled out. The length of the support frame 9 in the vehicle width direction can be adjusted by adjusting the amount of protrusion of both end members 58b from the intermediate member 58a.

A leveling height adjusting device 60 consisting of a screw mechanism is suspended at both ends of the intermediate member 58a, and a screed main body 61 extending in the width direction of the vehicle is provided at the lower end of the leveling height adjusting device 60. A guide member 62 is attached to support the vehicle so as to be reciprocatable in the vehicle width direction. A screed main body 61 is suspended from these guide members 62 via brackets 63, and the surface of the screed main body 61 that contacts the concrete surface is formed flat.

A bracket 64 is attached to the center of the screed body 61, and one end of a link member 65 is attached to the bracket 64 so as to be freely rotatable. Further, a hydraulic motor 66 is attached to the lower end of the leveling height adjusting device 60, and the other end of the link member 65 is rotated on the output shaft of the hydraulic motor 66 while being offset from the center of the output shaft. Freely installed.

Then, by swinging the link member 65 with the rotational force of the hydraulic motor 66, the screed main body 6
1 is moved forward in the width direction of the vehicle.

In FIG. 14, 67 is a handle for adjusting the frame height, and 68 is a handle for adjusting the leveling height.

Next, the operation will be explained with reference to FIGS. 15 and 16.

After spreading concrete between the pair of rails 6, the paving material construction device is moved forward (left side in Figure 15).

After the spread concrete is spread to a predetermined width by a spreader 1 and roughly leveled to a substantially constant height, the roughly leveled paving material is compacted by a compaction device 2.

That is, when the front support member 31 and the rear support member 34 are moved forward while being alternately moved up and down by the driving force of the hydraulic motor 38, the lower part of each embedded protrusion member 36 is roughly leveled as shown in FIG. Repeated entry into concrete. Therefore, the reinforcing fibers mixed into the concrete are embedded to a relatively deep position in the concrete at the lower end of the embedded projection member 36, as shown by A in FIG. In particular, by providing the embedded protrusion members 36 in adjacent compaction devices 2 with their positions shifted in the vehicle width direction, the embedded protrusion members 36 can be moved into and out of the concrete over the entire construction width, and Since the embedded projection member 36 is continuously moved into and out of the concrete by a predetermined amount, the reinforcing fibers can be reliably pushed into the concrete, and the final finish can be improved. Therefore, it is possible to prevent the reinforcing fibers from being exposed from the concrete surface before the concrete hardens after construction, improving the finish of the concrete pavement and improving the safety of vehicle driving.

Further, the compacted concrete surface is vibrated with a vibrator 3 to spread concrete to a substantially constant height, and then the surface of the spread concrete is finished into a substantially flat shape with a screed 4.

Furthermore, if necessary, a surface finishing device 69 is run behind the paving material construction device to further flatten the concrete surface.

In particular, by running the present paving material construction device at a constant speed, the final finish of the entire construction surface can be made uniform.

Furthermore, the paving material is not limited to concrete;
Furthermore, the reinforcing fibers are not limited to steel or plastic. Further, the front and rear support members 31 and 34 of the compaction device 2 are not limited to the box shape,
The embedded protrusion member 36 may be a fork-like member that is bent toward the rear of the vehicle as it goes downward.

<Effects of the Invention> As explained above, the present invention has embedded protrusion members arranged at predetermined intervals in the roughly leveled paving material, thereby making it possible to use fiber-reinforced concrete that is difficult to compact. Even if reinforcing fibers are mixed into the paving material, they can be forced into the paving material.
Therefore, reinforcing fibers and the like can be prevented from being exposed from the surface of the paving material, and the surface finish of the paving material can be improved and the safety of vehicle running can be ensured.

In particular, a plurality of tightening devices are arranged adjacent to each other at predetermined intervals in the longitudinal direction of the vehicle, and the embedded protrusion members provided on the tightening devices are shifted in the vehicle width direction between adjacent tightening devices. Since the embedded projecting member is configured to continuously enter and exit the paving material by a predetermined amount, reinforcing fibers, etc. can be reliably pushed into the paving material such as concrete, improving the final finish. It has the advantage of being able to

[Brief explanation of the drawing]

Figure 1 is a side view showing one embodiment of the present invention, Figure 2 is a side view showing one embodiment of the present invention;
The figure is a plan view of the same as above, FIG. 3 is a front view of the spreader part of the above, FIG. 4 is a front view of the support frame part of the above, FIG. 5 is a side view of the main part of FIG.
The figure is a front view showing the same compacting device as above, FIG. 7 is an enlarged view of the main part of FIG. 6, FIG. 8 is a bottom view of FIG. 6, and FIG. 9 is a side view of the main part of FIG. 7. Fig. 10 is an enlarged view of the main part of Fig. 6, Fig. 11 is a front view showing the same vibrator part as above, Fig. 12 is an enlarged view of the main part of Fig. 11,
13 is a side view of FIG. 12, FIG. 14 is a front view showing the same screed part, and FIGS. 15 and 16.
The figure is a diagram for explaining the same effect as above. DESCRIPTION OF SYMBOLS 1... Spreader, 2... Compacting device, 3... Vibrator, 4... Screed, 36... Embedded projection member.

Claims (1)

[Claims] 1. A roughening device extending in the width direction of the vehicle and roughly leveling the spread paving material to a substantially constant height, and a continuous up-and-down reciprocating device installed behind the roughening device at predetermined intervals in the width direction of the vehicle. A compaction device comprising a plurality of embedded protrusion members that continuously enter and exit the paving material by a predetermined amount by movement, the plurality of embedded protrusions being arranged adjacently at predetermined intervals in the longitudinal direction of the vehicle. A compaction device in which the compaction projection members are provided at different positions in the vehicle width direction between adjacent compaction devices, and a compaction device provided at the rear of the compaction device to maintain the paving material compacted by the compaction device at approximately the same level. A paving material construction device characterized in that a vehicle is equipped with a paving device that spreads the material to a certain height, and a finishing device that finishes the surface of the paving material that has been spread.