JP2507937Y2 - Leveling equipment for asphalt mixture - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for leveling an asphalt mixture, and more particularly to a device useful for new construction such as a tennis court having a wide construction width.

[0002]

2. Description of the Related Art Conventionally, for example, when a tennis court is newly constructed by asphalt pavement, an asphalt finisher used during road asphalt pavement construction has been used. That is, while moving the asphalt finisher forward, the asphalt mixture was sprayed onto the roadbed from the rear part of the finisher, and the sprayed asphalt mixture was laid flat by a screed.

By the way, since the construction width of the asphalt finisher is narrow, when laying the asphalt mixture on a tennis court having a wide construction width, it is performed as follows. That is, as shown in FIG. 5, a plurality of molds A are installed at predetermined intervals in the longitudinal direction of the tennis court, and a sensor rope B serving as a reference position for laying is stretched. Then, the asphalt finisher is run between the sensor ropes B as shown by the arrow in FIG. 5 to spread the asphalt mixture.

Further, near the doorway of the asphalt finisher on one end side (the lower end side in FIG. 5) of the tennis court, a mold C is installed in a direction orthogonal to the longitudinal direction and a sensor rope D is stretched. Then, the asphalt finisher is run along the sensor rope D to spread the asphalt mixture.

[0005]

However, when a tennis court having a wide construction width is constructed by an ordinary asphalt finisher, the number of form frames (5 lanes in the example of FIG. 5) and the number of sensor ropes (of FIG. 5) are installed. However, there is a problem that the work time is long and the work efficiency is poor. In addition, the flatness is impaired at the connection portion where the asphalt mixture of the adjacent lanes is connected, but the conventional connection has many connection portions (six in the example of FIG. 5), which makes the flattening of the connection portion complicated, Therefore, there is a problem that the leveling work efficiency deteriorates.

The present invention has been made in view of such circumstances, and provides a leveling device capable of improving the leveling work efficiency and the leveling flatness even in a tennis court having a wide construction width. The purpose is to do.

[0007]

Therefore, according to the present invention, there is provided a support body which is attached to a vehicle body so as to extend in a vehicle width direction of the vehicle body, and a support body which extends in a direction substantially orthogonal to the vehicle width direction. A spreader that is attached to a support body so as to be movable in the vehicle width direction, and spreads an asphalt mixture on a roadbed, and extends in a direction substantially orthogonal to the vehicle width direction so that the support body is freely movable in the vehicle width direction. A screed that is mounted and spreads the spread asphalt mixture to a predetermined spread height, and is attached to the support so as to be movable in the vehicle width direction, and supplies the asphalt mixture to the roadbed in front of the spreader. The asphalt mixture supplying device, and the moving device for moving the asphalt mixture supplying device, the spreading device, and the screed in the vehicle width direction are provided.

[0008]

The spreading device, the screed, and the asphalt mixture supply device are moved in the vehicle width direction to spread and spread the asphalt mixture. Then, when the laying work of one construction width is completed, the vehicle is moved by a predetermined amount in the direction orthogonal to the laying direction to perform the post laying work.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. As shown in FIGS. 2 and 3, one end portion of a pair of link members 2A and 2B is swingably mounted in a substantially vertical plane on both sides of the rear portion of the frame of the crawler type tractor 1, and each link member 2A, Brackets 3 are swingably attached to the other ends of 2B. A plate-like member 4 is provided at the rear end of the bracket 3 so as to extend in the vehicle width direction and is attached to both brackets 3 so as to extend therethrough. The link members 2A, 2B, the bracket 3 and the plate member 4 are oscillated by a hydraulic cylinder 5 as described later.

A central portion support 6 having a truss structure is attached to the plate member 4 so as to extend in the vehicle width direction. On one side of the central support 6, the first side support 7 extends in the vehicle width direction and is swingably attached in a substantially horizontal plane. A second side support 8 is provided at the other end of the center support 6 so as to extend in the vehicle width direction and is swingably attached in a substantially horizontal plane. Each side support 7, 8
As shown in FIG. 2, the hydraulic cylinders 9 and 10 attached to the frame of the tractor 1 respectively oscillate to extend the vehicle in the vehicle width direction and store the vehicle at the rear storage position (chain line position in FIG. 2).
You can move between and.

Hydraulically driven lifting devices 11 and 12 are attached to the substantially central portions of the side support members 7 and 8, and the side support members 7 and 8 are attached to the lower ends of the lifting devices 11 and 12. Side rollers 13 and 14 for respectively supporting the rollers are rotatably attached. A guide rail (not shown) is provided on the upper walls of the central support 6 and the side supports 7 and 8, and an asphalt mixture supply device 15 is provided along the guide rail in the vehicle width direction. It is placed freely movable.

The asphalt mixture supplying device 15 is provided with a carriage 16 provided with rollers (not shown) rolling on the guide rails, and the carriage 16 is provided with a hopper 17.
Is placed. As shown in FIG. 1, the hopper 17 is configured such that both side portions are freely swingable in a substantially vertical plane with a central portion as a center, and the both side portions are hydraulic cylinders 18A, 18A.
B is tilted from the solid line position in FIG. 2 to the chain line position. A unloading screw conveyor 19 is provided at the lower center of the hopper 17, and the screw conveyor 19 causes the asphalt mixture in the hopper 17 to be dropped and supplied to the below-described leveling device main body 20.

Further, as shown in FIG. 2, a first chain gear 21 is rotatably attached to the outer end of the second side support 8 while the outer end of the first side support 8 is rotated. A second chain gear 22 is rotatably attached to the. A hopper chain 23 is wound around the first chain gear 21 and the second chain gear 22 so as to extend in the vehicle width direction. As shown in FIG. 2, a hopper moving drive unit 24 is attached to the first side support 7, and the gear unit of the drive unit 24 is meshed with the hopper chain 23.
The drive unit 24 causes the hopper chain 23 to circulate between the first chain gear 21 and the second chain gear 22.

A rack gear (not shown) at the bottom of the carriage 16 is meshed with the hopper chain 23. Therefore, by operating the driving unit 24, the asphalt mixture supplying device 15 is operated by each of the supports 6.
It is possible to move in the vehicle width direction along ~ 8.
A guide rail (not shown) is provided at the rear of each of the supports 6 to 8, and a screed saddle portion 25 is attached to the guide rail so as to be freely movable in the vehicle width direction along the guide rail. . As shown in FIG. 3, a supporting member 26 is attached to the screed saddle portion 25 so as to extend toward the rear of the vehicle.
0 is suspended and attached.

The spreader main body 20 is provided with a spreader screw conveyor 27 as a spreader. The screw conveyor 27 spreads the asphalt mixture dropped and supplied from the hopper 17 on the roadbed. ing. On the outer peripheral wall of the blade portion of the screw conveyor 27, the below-described roadbed trimming bits are arranged in rows at predetermined intervals. A blade 27A is arranged in parallel with the screw conveyor 27 at the front end of the spreader main body 20 with a predetermined gap. Further, behind the screw conveyor 27, a box-shaped screed 28 for laying out the asphalt mixture spread by the screw conveyor 27 is provided in parallel. The bottom surface of the screed 28 is formed so as to be inclined so that the front portion (left side in FIG. 1) in the spreading direction is higher than the rear portion. Further, the screed 28 is provided with a vibration device for leveling. Further, a hopper 29 for receiving the asphalt mixture dropped from the hopper 17 is attached to the support member 26, and the hopper 29 and the asphalt mixture are fed to the screw conveyor 2
7 and the blade 27A are dropped and supplied onto the roadbed.

A third chain gear (not shown) is rotatably attached to the outer end of the first side support 7 while the second end of the second side support 8 is shown in FIG. As shown, the fourth chain wheel 30 is rotatably attached. A screed chain 31 is extended and wound around the third chain gear and the fourth chain gear 30 in the vehicle width direction. A screed moving drive unit 32 is attached to the second side support 8, and a gear portion of the drive unit 32 is connected to the fourth chain gear 30 via a chain. The drive unit 32 causes the screed chain 31 to circulate between the third chain gear and the third chain gear 30.

A rack gear portion (not shown) of the screed saddle portion 25 is meshed with the screed chain 31. Therefore, by operating the drive unit 32, the leveling device main body 20 can be moved in the vehicle width direction along the supports 6 to 8. Further, an operation panel 33 for remotely operating various devices of the asphalt mixture supply device 15 and the leveling device main body 20 during the leveling work is provided. Grade controllers 34 are provided at the outer ends of the first and second side supports 7 and 8, respectively. The grade controller 34 detects a leveling height reference position from a sensor rope or the like, operates the elevating devices 11 and 12 so that the leveling height becomes a target leveling height, and supports 6 to 6 are supported. The height of 8 is adjusted.

Here, the first chain gear 21, the second chain gear 22, the hopper chain 23, the hopper moving drive unit 24, the third chain gear, the fourth chain gear 30, the screed chain 31, and the screed moving drive. Part 3
2 and the mobile device. Incidentally, 35 is a cable reel for winding a cable for supplying electric power to the electric equipment of the asphalt mixture supplying device 15, 36 is a generator for supplying electric power to various electric equipment, and 37 is a hydraulic device for supplying hydraulic pressure to various hydraulic equipment. , 38 is a tractor fuel tank 39 and a main operation panel.

Next, the operation will be described with reference to FIG.
First, the asphalt mixture supply device 15 and the leveling device main body 20 are positioned outside the first side support 7. Then, the asphalt mixture for one lane (black arrow in FIG. 4) is supplied to the hopper 17 from, for example, a wheel loader. At this time, both sides of the hopper 17 are arranged in a substantially horizontal state as shown by the solid line in FIG.

Then, by operating the operation panel 33, the asphalt mixture supply device 15 and the leveling device main body 2
0 and 0 are started to move in the vehicle width direction (leftward in FIG. 1) along the supports 6 to 8 to start the leveling work. Then, the asphalt mixture is dropped and supplied from the hopper 17 to the hopper 29 by the screw conveyor 19. At this time, the hopper 17
The asphalt mixture is dropped and supplied from the screw conveyor 27 to the hopper 29 while gradually inclining both side portions by the hydraulic cylinders 18A and 18B as shown by the chain line in FIG.
The asphalt mixture dropped from the screw conveyor 19 is fed through the hopper 29 to the screw conveyor 27.
And the blade 27A are dropped and supplied onto the roadbed.

The asphalt mixture supplied by dropping is spread by a screw conveyor 27,
It is spread by the screed 28. Here, the asphalt mixture supply device 15 supplies the asphalt mixture to the leveling device main body 20 before the leveling device main body 20 reaches the outer end portion (the left end side in FIG. 1) of the side support body 8. However, at the same time as this end, the asphalt mixture supply device 1
5 is returned to the outer end of the first side support 7, that is, the start position.

Then, when the leveling device main body 20 moves to the outer end (the left end in FIG. 1) of the second side support 8, after the leveling work for one lane is completed and the tip of the screed 28 is lifted. , The tractor 1 is run as shown by the white arrow in Fig. 4 to move the device to the next lane. After that, the leveling device body 2
0 is returned to the outer end of the first side support 7, that is, the start position. During the period in which the leveling device main body 20 is returned to the start position, the asphalt mixture in the next lane is supplied to the hopper 17 from the wheel loader or the like, and the leveling operation for that lane is performed.

When all the leveling work is completed, the asphalt mixture supply device 15 and the leveling device main body 20 are moved to the central portion of the central support body 6, and the first and second side support bodies 7 are also moved. , 8 are arranged behind the tractor 1 by the hydraulic cylinders 9 and 10 so as to swing to the rear of the tractor 1. Further, as shown by the chain line in FIG. 3, the hydraulic cylinder 5 swings the link members 2A and 2B in the clockwise direction so that the asphalt mixture supply device 15 and the central support 6 are disposed above the rear part of the tractor 1.

In this way, after the width and length of the device are within the transportation limits according to the Road Traffic Act, the device is mounted on a carrier and moved to the next construction site. Further, in the trimming process of the roadbed, the leveling device main body 20 is arranged at the outer end portion of the second side support body 8 contrary to the leveling work, and this position is set as the start position. Then, after moving the leveling device main body 20 along the supports 6 to 8 in the vehicle width direction, after scraping the roadbed by the bits of the screw conveyor 27, particularly the outer peripheral portion, the scraped roadbed is spread by the blade 27A. Then, the roadbed is trimmed. During this trimming process, the screed 28 is moved upward by a predetermined amount, and the operation of the asphalt mixture supply device 15 is stopped.

As described above, the asphalt mixture supply device 15, the screw conveyor 27, and the screed 2
After performing the laying work for one lane while moving in the vehicle width direction along with 8 and the supports 6 to 8, the tractor 1 is moved forward and moved to the next lane to perform the laying work. ,
Even in a tennis court with a wide construction width, the number of formwork installations (two in the example of FIG. 4) can be significantly reduced, and the number of sensor ropes installed (four in the example of FIG. 4) can be significantly reduced. The installation work of can be greatly reduced and the laying work efficiency can be greatly improved. Further, since the number of molds is reduced and the number of connecting portions is reduced, the flatness can be improved without performing the flattening process on those connecting portions. Here, the asphalt mixture in the adjacent lane comes into direct contact, but since the leveling work can be transferred to the adjacent lane in a short time, the leveling work in the next lane can be performed while the asphalt mixture in the previous lane is hot. Therefore, the asphalt mixture can be well adhered and the flatness can be well maintained without providing a mold. Further, since the traveling lanes of the tractor 1 can be significantly reduced, the leveling work can be performed without damaging the roadbed.

The screw conveyor 27 and the screed 28 may be separately moved in the vehicle width direction by different moving devices, and the asphalt mixture supplying device 15 and the leveling device body 2 may be moved in the same moving device. It may be moved in the vehicle width direction.

[0027]

As described above, according to the present invention, the asphalt mixture supply device, the spreader, and the screed are moved along the support in the vehicle width direction to perform the leveling work. Even on a wide tennis court, the flatness can be greatly improved and the leveling work efficiency can be greatly improved.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is a plan view of the above.

FIG. 3 is a right side view of FIG. 1.

FIG. 4 is a view for explaining the operation of the above.

FIG. 5 is a diagram for explaining a conventional spreading method.

[Explanation of symbols]

 1 tractor 6 center support 7 first side support 8 second side support 15 asphalt mixture supply device 17 hopper 21 first chain gear 22 second chain gear 23 hopper chain 24 hopper moving drive unit 27 screw Conveyor 28 Screed 30 Fourth Chain Gear 31 Screed Chain 32 Screed Drive Unit

Claims (1)

(57) [Scope of utility model registration request] 1. A support body that is attached to a vehicle body so as to extend in the vehicle width direction of the vehicle body, and a support body that extends in a direction substantially orthogonal to the vehicle width direction and is movably attached to the support body in the vehicle width direction. And a spreading device for spreading the asphalt mixture on a roadbed, and extending in a direction substantially orthogonal to the vehicle width direction, movably attached to the support body in the vehicle width direction, the spread asphalt mixture. A screed that spreads to a predetermined flat height, an asphalt mixture supply device that is attached to the support so as to be movable in the vehicle width direction and that supplies an asphalt mixture onto the roadbed in front of the spreader, and the asphalt mixture supply. An asphalt mixture leveling device, comprising: a device, the spreading device, and a moving device that moves the screed in the vehicle width direction.