JPH10168808A - Screed device for asphalt finisher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid paving compound quantity from becoming less on the right and left end areas of a road when the road is paved with asphalt compound using an asphalt finisher. SOLUTION: An end screed device 8, which is provided with an extension/ auxiliary screed device adjoining thereto, is provided with an inclined side 9b, which is inclined outward to the right and left more at the lower part than the upper end overlapping 9 in a plan view, and a movable side plate 10 provided in a movable manner with respect to the inclined side 9b, while a lower part 10a of the movable side plate 10 is positioned more outward and downward than the right and left ends of the end screed plate 9b. A compound narrow- down plate 9e, which is inclined with its front high and rear low further at the front than the end screed plate 9d and extended from the inclined end to the front end of the end screed plate 9d, is formed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of a screed device for an asphalt finisher for paving a road surface or the like.

[0002]

2. Description of the Related Art Generally, when paving a road or the like, an asphalt finisher is used to spread an asphalt mixture onto a road surface, and the spread asphalt mixture is compacted with a screed (initial compression). Work is performed, and then the road surface is compacted (secondary compression) again by a heavy rolling machine such as a load roller. In this case, where there is no street beam, curb or the like at the end of the road, the screed makes the side edge of the compaction portion a vertical plane, so when the side edge is compacted by a compaction machine, May collapse. For this reason, conventionally, the paving work has been performed after forming the formwork with wood or the like in advance so that the side edges do not collapse.

[0003]

However, in the case of using the above-mentioned conventional formwork, the work of installing the formwork and the work of removing the formwork are required, and a great deal of labor is required. There is a problem that the workability becomes poor. In particular, when asphalt pavement work is performed on general roads, work such as installation of the formwork and removal work is forced under various traffic regulations, which poses a problem in terms of safety. Occurs. Moreover, since the pavement thickness varies depending on the pavement location, it is necessary to form a mold corresponding to this, and various molds must be prepared. No management problems. On the other hand, when the pavement width is wide, the pavement may be divided into a plurality of parts, and in such a case, when trying to form a vertical joint by joining the vertical end faces together, a gap is easily generated in the abutting surface. It takes time to repair it. In order to avoid this, there is a construction method in which after flattening the mixture on the end face of the already compacted surface so as to overlap, the overlapped mixture is removed with a rake or the like and then compacted. There is a problem that it takes time.

Therefore, the end surface of the pavement mixture is inclined to prevent the end of the mixture from collapsing, and the pavement mixture is paved in the next step on the inclined end surface so that no gap is formed in the mating surface. For example, Japanese Utility Model Publication No. 3-27049,
It is proposed in Japanese Patent Application Laid-Open No. Hei 5-195510. First, in the former case, the inclined plate is extended so as to protrude outward in the left-right direction from the lower end of the vertical side plate of the vibrating screed, and the inclined plate is vibrated together with the vibration of the screed to tilt the end of the mixture. It is configured to be compacted. However, the mixture is diffused in the left-right direction according to the natural flow accompanying the forward movement of the traveling body, diffusion by the screw spreader, etc., but the flowability is poor, so the diffusion to the inclined side plate is hindered by the vertical side plate, and the mixture is mixed. Insufficiency of the mixture is more remarkable as the amount of diffusion of the mixture to the left and right ends decreases, and in this case, the degree of compaction of the inclined plate portion of the mixture decreases, and the mixture becomes heavy. There is still a problem that it cannot withstand compaction by a rolling machine and lacks the effect of preventing the end of the mixture from collapsing. On the other hand, in the case of the latter, an auxiliary screed for compaction of an end portion is arranged behind the screed so as to protrude rearward, and the mixed material end spread with the screed is compacted again with the auxiliary screed. . By the way, the asphalt finisher is provided with a step at the rear of the screed over the entire width of the screed, so that the operator can check the pavement condition. It is required to be able to move by steps. As a result, in the case where the auxiliary screed is provided in a protruding manner at the rear end of the screed, it is difficult to provide the steps in a line in the left-right direction, and there is a problem that workability is impaired. There was a problem to be solved.

[0005]

SUMMARY OF THE INVENTION In view of the above-mentioned circumstances, the present invention has been made to solve these problems, and has been developed to solve the problem of asphalt mixture mixed right and left by a screw spreader. An asphalt finisher provided with a screed device for leveling with a screed plate, and at the left and right ends of the screed device,
The upper part of the screed plate is inclined outward in the left-right direction from the upper end part overlapping the screed plate in plan view, and the lower end is located outside the left-right end of the screed plate and extends below the screed plate surface. An inclined side plate having a side surface is provided so as to extend forward from the position of the screed plate. A mixture narrowing plate having a lower surface reaching the front end of the plate is provided. By doing so, it is possible to ensure a state where the asphalt mixture laid on the road surface is sufficiently secured to the left and right ends. In this, the screed device of the present invention is provided with an end screed device for paving the pavement end portion, and the end screed device is provided with an inclined side plate and a mixture guide plate. Is what it is. Further, in this embodiment, the end screed device of the present invention is provided with an auxiliary tamper at a position behind the mixture guide plate. Further, in this embodiment, the inclined side plate of the present invention comprises a fixed side plate fixed to the fuselage side, a position adjustable in the inclined direction with respect to the fixed side plate, and a rear end extending rearward from a rear end of the screed plate. And a movable side plate. Further, in this apparatus, between the fixed side plate and the movable side plate of the present invention, an elastic machine for urging the movable side plate downward inclining is interposed. Furthermore, in this case, the inclined side plate of the present invention is provided with a heating means for heating the asphalt mixture. Further, the present invention is an asphalt finisher comprising a screed device for leveling the asphalt mixture diffused right and left by a screw spreader with a screed plate. An inclined side plate having an inner side surface which is inclined outward in the left-right direction from the upper end portion overlapping with the screed plate toward the lower side toward the lower side and has a lower end below the screed plate surface so as to extend forward from the screed plate position. Along with the inner side surface of the inclined side plate, a mixture guide plate having a lower surface that is inclined forward and rearward and lower than the screed plate and has a lower surface extending from the inclined lower end to the front end of the screed plate is provided. Is what it is. By doing so, it is possible to ensure that the asphalt mixture laid on the road surface is sufficiently secured to the left and right ends.

[0006]

FIG. 1 shows an embodiment of the present invention.
This will be described with reference to FIG. In the drawings, reference numeral 1 denotes an asphalt finisher. The asphalt finisher 1 includes a hopper 3 disposed in front of a driver's seat 2 on which an asphalt mixture M is loaded, and an asphalt mixture M loaded on the hopper 3 having a vehicle body. Bar conveyor 4 to be transported backward,
It is composed of various members such as a screw spreader 5 for diffusing the asphalt mixture M conveyed from the bar conveyor 4 in the width direction of the road surface GL in the left and right direction, and further behind the screw spreader 5 to the road surface GL. The screed device 6 for compacting and leveling the diffused asphalt mixture M is provided in the conventional manner.

The screed device 6 is provided with a main screed device 6A located at the front, a telescopic screed device 6B located at the rear, and an auxiliary screed device 6C if necessary (in this embodiment, FIG. As shown in the figure, an auxiliary screed device 6C is provided on the left side in the vehicle body traveling direction and is not provided on the right side.) The screed device 6 is formed to be long in the left and right direction facing the road surface side, A mixture gate 6a for averaging the accumulated amount of asphalt mixture M to an appropriate amount, and a tamper device 6 for compacting the asphalt mixture M averaged to the appropriate amount.
b, a screed plate (screed plate) 6c, etc., which is disposed behind the composite material gate 6a and the tamper device 6b and spreads the asphalt composite material M. Then, the asphalt finisher 1 performs a series of operations of diffusing and compacting the asphalt mixture M as the vehicle travels, and leveling the screed plate 6c. In this manner, the paving mixture M is laid on the road surface GL. It is set to be. Reference numeral 7 denotes the last part of the asphalt finisher, that is, the telescopic screed device 6B and the auxiliary screed device 6
Step C
A standing operator can check the pavement finishing status at the road end.

The telescopic and auxiliary screed device 6
End screed devices 8 according to the present invention are detachably attached to both left and right ends of B and 6C.
It is set so that the asphalt mixture M is compacted and spread together with the expansion and contraction and auxiliary screed devices 6B and 6C. In other words, the end screed device 8 is composed of the fixed side plate 9 and the movable side plate 10 formed long in the front-rear direction. First, the fixed side plate 9 will be described. This fixed side plate 9
Is a vertical side portion 9a which is a substantially vertical plate surface constituting the upper half portion.
And an inclined side portion 9 formed of an inclined plate surface so as to constitute a lower half portion, and the inner side surface is inclined outward in the left-right direction as the lower side.
b, and the length is set to the length that the lower end of the inclined side portion 9b reaches the screed plate 6c. The fixed side plate 9 is configured such that the rear portion of the vertical side portion 9a is expandable and contractible, and is detachably fixed to the left and right sides of the auxiliary screed devices 6B and 6C. The portion is set so as to be disposed in a state of reaching to a portion corresponding to the side of the screw spreader 5 disposed in front of the telescopic and auxiliary screed devices 6B and 6C.

On the other hand, a vertically extending side 9c extends downward from the lower end of the vertical side 9a of the fixed side plate 9. The lower end of the extended side 9c has a telescopic, auxiliary screed device 6B, 6
In the rear part adjacent to C, the length is formed to reach the screed plate 6c.
At the front part ahead of C, it is integrally formed in a cut-out state so that the lower edge is gradually shortened. Then, between the extended side portion 9c and the inclined side portion 9b at the rear portion, the asphalt mixture is spread in a state where they are connected and substantially flush with the screed plate 6c. The lower plate 9d is formed integrally. Here, the lower plate 9d
Is formed so as to continue outward in the left-right direction of the screed plate 6c and acts as an auxiliary screed plate.
The lower plate 9d of the present embodiment is formed so as to protrude to a position further forward than the position corresponding to the front end of the screed plate 6c. On the other hand, the extension side 9 at the front part
c and the inclined side portion 9b, a mixture narrowing plate 9 that is inclined in a front-to-back and rear-to-back state along the lower edge of the extended side portion 9c.
e are integrally formed. This mixture narrowing plate 9e
Is located forward of the telescopic and auxiliary screed devices 6B and 6C, and has a lower inclined lower end (rear end).
d, the asphalt mixture M is set so as to be spread on the lower plate 9d in a state of being narrowed down by the mixture narrowing plate 9e as described later. Further, a rear portion of the fixed side plate 9 is configured such that a triangular gap formed by the extended side portion 9c, the inclined side portion 9b, and the lower side plate 9d is covered by an integrally formed cover plate 9f. The front portion of the fixed side plate 9 remains open.

The movable side plate 10 is made of a plate-like member that is long in the front-rear direction. The front end of the movable side plate 10 substantially coincides with the front end of the fixed side plate 9, but the rear end of the movable side plate 10 is substantially the same as the rear end of the fixed side plate 9 (substantially the rear end of the screed plate 6c). Match), but it extends backward,
At its lower edge, a thick lower end portion 10a is formed. The movable side plate 10 has a pair of front and rear guide square tubes 11 each having a pair of front and rear square rods 10b fixed to the upper surface fixed to the upper surface of the inclined side portion 9b on the fixed side plate 9 side.
It is set so that it can be moved in the inclined direction by being fitted into and pulled out of the device. Further, a hydraulic cylinder (hydraulic hoist) 12 is provided at the center in the front-rear direction of the fixed side 9, and the rod portion 12 a is connected to the movable side 1.
When the movable side plate 10 is connected to the support bracket 13 provided on the zero side, the position of the movable side plate 10 can be adjusted in the tilt direction with respect to the fixed side plate 9 based on the expansion and contraction operation of the rod portion 12a. The lower end 10a of the side plate 10
It is set so that it can be appropriately adjusted to a protruding amount so as to be located outside the lower end of the inclined side 9b and below the lower side plate 9d following the fixed side plate inclined side 9b. As a result, the end screed device 8 is inclined outward in the left-right direction toward the lower side from the upper end portion overlapping the lower plate 9d (end screed plate) in a plan view, and the lower end is provided with the lower plate 9d. The inclined side plate of the present invention having an inner side surface located outside the left-right direction end portion and below the plate surface of the lower side plate 9d is formed, and a portion projecting downward is provided. The end of the asphalt mixture M is set so as to be inclined. Here, a connecting portion between the rod portion 12a of the hydraulic hoist 12 and the movable side plate 10 is movably fitted with a pin 12b projecting from the outer peripheral surface of the rod portion 12a into a long hole 13a formed in the support bracket 13. While the tip of the rod portion 12a is
The lower end 10a of the movable side plate 10 is connected to the lower end 10a of the movable side plate 10 via a compression spring 14 so that the lower end 10a is urged in a direction in which the lower end 10a is pressed against the road surface GL. . Thereby, the movable side plate lower end portion 1
0a is set so that even if the road surface GL has irregularities, the lower end portion 10a can follow the road surface GL and prevent the asphalt mixture M from leaking sideways.

Further, an auxiliary tamper bar 16 is mounted on the end screed device 8 via a mounting side 15, and the auxiliary tamper bar 16 is provided through a through hole H1 opened in the extension side 9c. The lower end of the auxiliary tamper bar 16 is connected to a drive unit (not shown) of the tamper device 6b disposed in front of the telescopic and auxiliary screed devices 6B and 6C, and the lower end of the auxiliary tamper bar 16 is higher than the portion corresponding to the end screed plate. It is in a state of penetrating through the through hole H2 formed in the front lower plate 9d, whereby the auxiliary tamper bar 16
It is set to operate together with the drive of the tamper device 6b to uniformly compact the asphalt mixture M supplied to the end screed plate side.

In the embodiment of the present invention configured as described above, the asphalt finisher 1 mainly uses the asphalt mixture M diffused on the road surface GL as it travels.
The screed device 6A, 6B, 6C for expansion and contraction and the screed device 8 for the end portion compacts it to a predetermined thickness, spreads the floor, and paves the road surface GL. In this case, the left and right ends of the pavement mixture M spread by the end screed device 8 are formed into an inclined shape with the supply of the asphalt mixture M well ensured.

That is, the asphalt mixture M supplied to the front corresponding portion of the end screed device 8 is
In the state where the outflow in the left and right direction is restricted by the b and the movable side edge lower end portion 10a, and the material is narrowed down and pressed in a state where it is guided by the front and rear low mixture material narrowing plate 9e. However, in this case, a corner portion C formed by the inclined side portion 9b and the mixture narrowing plate 9e is formed.
Are inclined outward and to the lower side in the left-right direction toward the rear. For this reason, the asphalt mixture M at the portion that has been subjected to the pressing action by the mixture narrowing plate 9e is pushed to the left and right sides where the pressing action by the mixture narrowing plate 9e has not yet been performed. The material pushed to the corner C side is pressed down as the mixture narrowing plate 9e, which becomes lower for a while toward the rear and widens outward in the left-right direction, hits against this. M is guided outward in the left-right direction. As a result, the asphalt mixture M is sufficiently supplied to the front end portion (lower end portion) of the lower end portion 1a at the rear portion of the movable side plate 1 parallel to the end screed plate 9d, resulting in a shortage of supply. The asphalt mixture M thus well supplied is compacted by the auxiliary tamper 16 and the lower plate (end screed plate) 9d, flattened by the secondary press by the heavy compaction machine. It can be finished to a compaction degree enough to withstand compression. Thus, in the embodiment of the present invention,
The pavement end can be formed in an inclined shape not in the rear of the auxiliary screed device 6B, 6C but in the left and right direction of the auxiliary screed device 6B, 6C, rather than in the rear of the auxiliary screed device 6B, 6C. In spite of this, it is possible to prevent a shortage of the asphalt mixture material M from being supplied to the end of the pavement, and to endure the secondary compression. Moreover, the adjustment of the pavement thickness can be easily performed by adjusting the movement of the movable side plate 10 with respect to the fixed side plate 9.

In this embodiment, the pavement end is provided with a movable side plate 1.
0, the movable side plate 10 is
It extends backward from the screed rear end,
Auxiliary screed devices 6A, 6B, 6C and lower plate 9
Since the pave end is formed even after the completion of the forming step by d, there is an advantage that the pave end can be formed with higher strength. Moreover, the movable side plate 10
Since it is located at the outermost end in the left-right direction, it can be extended rearward in an arrangement that does not interfere with step 7.

The present invention is, of course, not limited to the above-described embodiment, and the shape of the inclined side plate is inclined to the lower end as in the first embodiment, so that the left and right end portions of the asphalt mixture are left and right. Is not limited to the one formed on the inclined surface, and the lower end of the inclined side plate 8a may be vertically bent as in the second embodiment shown in FIG.

Furthermore, a burner device for heating the end screed plate 9d can be attached to the end screed device 8, and in this case, for example, the structure is the same as that of the third embodiment shown in FIG. can do. That is, the burner device 17 is set so as to be fastened to the attachment member 19 provided at the front or rear of the tamper bar 16 to heat the front portion of the end screed plate 9d. By doing so, it is possible to prevent the asphalt mixture M from adhering to the end screed plate 9d, and it is possible to improve the finished surface and the like.

Further, the present invention is not limited to a structure in which the screed device for the end portion is detachably provided on the main screed device as in the above embodiment,
In this case, the side plate itself of the screed device may be configured to be inclined outward in the left-right direction toward the lower side. Can be measured.

[Brief description of the drawings]

FIG. 1 is a schematic side view of an asphalt finisher.

FIG. 2 is a schematic plan view of an asphalt finisher.

FIG. 3 is a side view of an end screed device.

FIG. 4 is a rear view of the end screed device.

FIG. 5 is a perspective view illustrating a main part.

FIGS. 6A, 6B, and 6C are a plan view, a side view, and a front view, respectively, of the fixed side plate in a state where an inclined side portion is removed.

FIG. 7 is a rear view illustrating an end screed device according to a second embodiment.

FIG. 8 is a side view of a fixed side plate in a state where an inclined side is removed in an end screed device according to a third embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Asphalt finisher 5 Screw spreader 6 Screed device 6c Screed plate 7 Step 8 Screed device for end 9 Fixed side plate 9b Inclined side 9d Lower side plate 9e Mixing material narrowing plate 10 Movable side plate 10a Lower end 11 Guide square tube 12 Hydraulic cylinder 12a Rod Part 13 Support bracket 14 Compression ammunition M Asphalt mixture GL Road surface C Corner

Continuing on the front page (72) Inventor Koichi Okada 20-15 Minamikan, Miyagino-ku, Sendai City, Miyagi Prefecture Inside (72) Inventor Isamu Abe 20-15 Minamikan, Miyagino-ku, Sendai City, Miyagi Prefecture East North Construction Machinery Sales Co., Ltd.

Claims (7)

[Claims] 1. An asphalt finisher comprising a screed device for leveling an asphalt mixture diffused to the left and right by a screw spreader with a screed plate, wherein a left and right end of the screed device is provided in plan view. It has an inner surface that slopes outward in the left-right direction as it goes downward from the upper end that overlaps the screed plate, the lower end is located outside the left-right end of the screed plate, and extends below the screed plate surface. The inclined side plate is provided so as to extend forward from the screed plate position, and on the inner surface of the inclined side plate, the front end of the screed plate is inclined forward and backward from the screed plate. A screed device for an asphalt finisher provided with a mixture narrowing plate having a lower surface leading to a surface. 2. The screed device according to claim 1,
An asphalt finisher screed device comprising an end screed device for paving a pavement end, wherein the end screed device is provided with an inclined side plate and a mixture guide plate. 3. The screed device for an asphalt finisher according to claim 2, wherein the end screed device is provided with an auxiliary tamper at a position behind the mixture guide plate. 4. The screed plate according to claim 1, 2 or 3, wherein the inclined side plate is fixed to the fuselage side, and the position of the inclined side plate can be adjusted in the inclination direction with respect to the fixed side plate, and the rear end portion is behind the screed plate. A screed device for an asphalt finisher comprising a movable side plate extending backward from an end. 5. A screed device for an asphalt finisher according to claim 4, wherein an elastic mechanism for urging the movable side plate downward and inclined is interposed between the fixed side plate and the movable side plate. 6. A screed device for an asphalt finisher according to claim 1, wherein the inclined side plate is provided with a heating means for heating the asphalt mixture. 7. An asphalt finisher comprising a screed device for leveling an asphalt mixture diffused right and left by a screw spreader with a screed plate, wherein the screed device is provided at an end in a left-right direction in a plan view. An inclined side plate having an inner side surface which is inclined outward in the left-right direction from the upper end portion overlapping with the screed plate toward the lower side toward the lower side and has a lower end below the screed plate surface so as to extend forward from the screed plate position. Along with the inner side surface of the inclined side plate, a mixture guide plate having a lower surface that is inclined forward and rearward and lower than the screed plate and has a lower surface extending from the inclined lower end to the front end of the screed plate is provided. Asphalt finisher screeding equipment.