JPS63304806A - Paving material execution apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

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 plastic may be mixed into concrete.

However, fiber-reinforced concrete has inherent workability (
Workability is poor, and in particular, for paving 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 does not reduce the hardening and drying shrinkage of concrete, and also improves wear resistance. 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 such as steel that have a high specific gravity tend to settle below the paving member due to strong vibrations, while reinforcing fibers that have a small specific gravity such as plastics, on the other hand, cause the aggregate to settle and the fibers to rise relatively.
For this reason, unevenness tends to occur in the finished cross section of the paving material.

In addition, 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, Some of the reinforcing fibers may be exposed from the concrete surface before the reinforcing fibers harden.

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, even when reinforcing fibers such as steel or plastic are mixed in the pavement, such as concrete. The purpose is to provide

<Means for Solving the Problems> For this reason, the present invention includes 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 roughening device provided behind the roughening device. A compaction device comprising a plurality of embedded protrusions disposed at predetermined intervals in the vehicle width direction and which enter and exit the paving material by a predetermined amount by vertical movement; The vehicle is equipped with a spreading device that spreads the paving material compacted by the device to a substantially constant height, and a finishing device that finishes the surface of the spread paving material.

Further, it is possible to efficiently and uniformly compact fiber-reinforced concrete, etc., which is difficult to compact uniformly both in plan and in cross-section, by vertically reciprocating the embedded projection member. 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 as a roughening device for roughly leveling the spread concrete to a substantially constant height is installed extending in the width direction of the vehicle, and behind this spreader 1 is a surface of the concrete that has been roughly leveled. A compacting device 2 is provided extending in the width direction of the vehicle. Behind the compaction 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.

These spreaders 1. The tightening device 2 and the pie break 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 partially disposed on the rail 6 behind the traveling device 7, and the 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 is constructed by arranging a plurality of unit rotating shafts 11a, 1lb in the width direction of a predetermined length and connecting them, and selecting the length of the unit rotating shafts 11a, 1lbO in the vehicle width direction as appropriate. This allows the overall length in the width direction to 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 used to roughly level the concrete to a predetermined width and approximately constant height.

Both ends of the rotary wheel 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. This screed height adjustment device 12a.

12b is adapted to adjust the height of the rotation axis lO by rotating handles 13a and 13b.

A bell 1-15 is wound around one end of the rotating shaft 10 and the output shaft of the reducer 14, and the driving force of the hydraulic motor 16 is transmitted to the rotating shaft 1o via the reducer 14. It is designed to be rotated and driven.

Next, the support frame 5 and the traveling device 7 are attached as shown in FIGS. 4 and 5.
This will be explained based on the diagram.

The support frame 5 is provided with a plurality of rod-shaped frames 17 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 17 are provided at both ends of the intermediate member 17a.
b is attached coaxially and removably 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. Said wheel 20
A driven sprocket 21 is coaxially attached to one of the two as shown in FIG. Further, a reduction gear 22 is attached above the wheel 20, and a chain belt 24 is wound around the drive sprocket 23 of the reduction gear 822 and the driven sprocket 21. 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 2 is provided at both ends of the rotating shaft 28.
9 is mounted offset by a predetermined amount with respect to 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.
is attached so as to be offset by 180 degrees from the front eccentric collar 29. Rear vertically movable members 33 are rotatably attached to these rear eccentric collars 32, and rear support members 34 are rotatably attached to the lower ends of these rear vertically movable members 33. It is suspended and extended in the direction. Here, the rear support member 34 is provided at a position further rearward of the vehicle than the front support member 31, and the support members 31 and 34 are arranged substantially parallel to each other.

Further, a guide 35 is attached to the bracket 27 to keep the gap between the front support member 31 and the rear support member 34 at a constant value so that they do not come into contact with each other.

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, 34, respectively. The embedded protrusion member 36 has a first
As shown in FIG. 0, it is comprised of a mounting portion 36a to the support member 31.degree. 34, a large diameter portion 36b, and a tapered embedded portion 36c. Here, the mounting position of the embedded protrusion member 36 to the support member 31 is the mounting position of the embedded protrusion member 36 to the rear support member 34.
As shown in FIG. 8, the mounting position shown in FIG. 6 is shifted by a pitch of η.

Further, a hydraulic motor 38 and a reducer 39 are attached to a bracket 37 attached across the lower end of the compaction height adjusting device 26, and attached to a pulley 40 of the reducer 39 and the rotating wheel 28. A belt 42 is wound around the pressed pin 41.

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 tightening device 2 is configured to move up and down by rotating the handle 43 of the tightening height adjusting device 26.

Next, the pie break 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.

Brackets 46 are attached to both ends of this frame 45. These brackets 46 are connected to boxes 48 via anti-vibration rubber 47 as shown in FIGS. 12 and 13.
is suspended and extended in the width direction of the vehicle.

A rotary shaft 49 is rotatably attached to the box 48 via a support 50, and a plurality of disk-shaped unbalanced weights 51 are offset by a predetermined amount from the axis of the rotary shaft 49. They are installed at appropriate intervals. Further, a plurality of pie break weights 52 are attached to the box 48 at appropriate intervals, and these pie break weights 52 rotatably support the rotating shaft 49.

A hydraulic motor 53 is attached to the frame 45, and a belt 5 is attached to a pulley 54 attached to the output shaft of the hydraulic motor 53 and a boot IJ55 attached to the rotating shaft 49.
6 is wound.

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 M57, 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 is provided with an intermediate member 58a,
Both end members 58b are attached to both ends of the intermediate member 58a in the shape of a moving shaft and can be pulled out from the intermediate member 58a. 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 on these guide members 62 via brackets 63.
The surface of this screed body 61 that comes into contact with 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 output shaft of the hydraulic motor 66 is attached to the link member 6.
The other end of the output shaft 5 is offset from the center of the output shaft and is rotatably mounted.

By swinging the link member 65 by the rotational force of the hydraulic motor 66, the screed body 61 is moved forward in the width direction of the vehicle.

In addition, 67 in Fig. 14 is a handle for adjusting the frame height.

68 is a leveling height adjustment handle.

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).

Then, the spreader 1 spreads the spread concrete to a predetermined width and roughly level it to a substantially constant height, and then 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 pushed into the concrete to a relatively deep position at the lower end of the embedded protrusion member 36, as shown by the middle circle in FIG. Therefore, it is possible to prevent the reinforcing fibers from being exposed from the concrete surface before the concrete hardens after construction, thereby improving the appearance of the concrete pavement and improving vehicle running safety.

In addition, vibrator 3 is used to clean the compacted concrete surface.
After applying vibration and laying concrete to a constant height,
The surface of the laid 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.

Note that the paving material is not limited to concrete, and the reinforcing fibers are not limited to steel or plastic. In addition, the front and rear support members 31 and 34 of the tightening device 2
The embedded projection member 36 is not limited to a box shape, and may be a fork shape that is bent toward the rear of the vehicle as it goes downward.

<Effects of the Invention> As explained above, the present invention allows embedded protrusion members arranged at predetermined intervals to be buried in rough-leveled paving material, thereby making fiber-reinforced concrete 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.

[Brief explanation of the drawing]

FIG. 1 is a side view showing an embodiment of the present invention, FIG. 2 is a plan view of the same, and FIG. 3 is a front view of the spreader portion of the above.
Fig. 4 is a front view showing the support frame part of the same as above, Fig. 5 is a side view of the main part of Fig. 4, Fig. 6 is a front view showing the tightening device part of Fig. Figure 8 is a bottom view of Figure 6, Figure 9 is a side view of Figure 7, Figure 10 is an enlarged view of Figure 6, and Figure 11 is the same pipe lake as above. Fig. 12 is an enlarged view of the main part of Fig. 11, Fig. 13 is a front view showing the
The figure is a side view of FIG. 12, FIG. 14 is a front view showing the screed portion of the same, and FIGS. 15 and 16 are diagrams for explaining the operation of the same.

Claims (2)

[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; A compaction device includes a plurality of embedded protrusions that move into and out of the paving material by a predetermined amount by vertical reciprocating motion; 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. (2) The tightening device is composed of a plurality of tightening devices arranged adjacently at predetermined intervals in the longitudinal direction of the vehicle, and the embedded protruding members of the adjacent tightening devices are mutually arranged in the vehicle width direction. The paving material construction device according to claim 1, characterized in that the paving material construction device is configured to be staggered.