JPH0127203B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an asphalt finisher screed device having a main screed and a sub-screed configured to be able to arbitrarily adjust the pavement width using a hydraulic mechanism or the like.

A conventional example of the screed device for an asphalt finisher will be explained with reference to FIGS. 1 to 4. Asphalt mixture a supplied from a dump truck 1 is conveyed to the rear by a conveyor within a finisher body 2 having a traveling mechanism 2a. After being conveyed and spread horizontally by the conveyor screw 3, the main screed 7 and 1 disposed at both ends of the rear side
It has a structure in which the paving is leveled to a predetermined pavement width A and pavement thickness L by a set of subscrews 8, 8, and left and right side arms 6, which are connected to the left and right sides of the finisher body 2 by pivots 5, The rear part of 6 can be moved up and down, and the side arms 6, 6
A main screed 7 is pivotally attached to the rear part of the main screed 7 by pins 7a, 7a, and an adjustment bolt 20 is interposed between the rear end of the side arm 6 and the main screed 7. Sub-screeds 8, 8 for adjusting the pavement width by means of fixed brackets 12 and the like are connected to each other as shown in FIG. 3A, and arranged as shown in FIG. 2.

The main screed 7 and the sub-screeds 8, 8
In more detail, the screed device mainly consists of a main screed 7, as shown in FIGS.
and an adjustment frame 13 which is vertically installed on the fixed bracket 12 projecting from the rear side of the main screed 7 and is adjusted in the direction of the arrow C shown in FIG. 2 by a hydraulic cylinder or the like (not shown). A plurality of adjustment bolts 15 provided on the lower side and sub-screeds 8, 8 adjusted by the adjustment bolts 15
The main screed 7 and the sub-screeds 8, 8 are held at a predetermined inclination angle α, that is, a working angle, to form a predetermined pavement thickness B, and the working angle is changed by rotating the adjustment bolt 20. It can be adjusted to obtain the desired paving thickness B, and the sub-screeds 8, 8 can be adjusted in the directions shown by the arrows C and C using a hydraulic cylinder or the like (not shown) through the adjustment frame 13 and the adjustment bolt 15. It has a structure in which the width A can be changed and the height and inclination angle of the sub-screeds 8, 8 can be adjusted using adjustment bolts 15.

However, in the conventional screeding device, the adjustment bolt 20
The main screed 7 The rear part A of the main screed and the rear part B of the sub-screed are arranged in a front-back arrangement and have different centers of rotation, so there is a difference h in vertical height from the road surfaces G and L. There is a difference in the pavement thickness in the section 8. Therefore, conventionally, the sub screeds 8, 8 are controlled by a plurality of adjustment bolts 15.
Adjustment work is being carried out to increase the paving thickness to eliminate the difference in the pavement thickness and to make the pavement thickness uniform.The adjustment, which is performed each time the working angle is changed, is performed by rotating a plurality of adjustment bolts 15. The work of changing the height of the secondary screeds 8, 8 is a very troublesome and time-consuming work, and it is necessary to observe the occurrence of a level difference between the finished surface by the main screed 7 and the finished surface by the secondary screeds 8, 8. This has disadvantages, such as the fact that unevenness remains in some areas of the paved surface, requiring troublesome work to eliminate them.

The present invention was developed in order to eliminate the above-mentioned drawbacks of conventional asphalt finisher screed devices. The main screed and the sub-screed are connected by a parallel interlocking mechanism, and the main screed and the sub-screed are connected by a second parallel interlocking mechanism comprising parallel links interlocked with the first parallel interlocking mechanism. The main screed is configured to move up and down at the same inclination angle and height, and is characterized in that a tilt angle adjustment mechanism is provided between the side arm and the main screed to simultaneously adjust the inclination angles of the main and sub screed. The purpose of this is that when changing the inclination angle of the screed, the main screed and the sub-screed are moved up and down at the same time at the same inclination angle and height. The object of the present invention is to provide a screeding device for an asphalt finisher that improves paving precision in the pavement width direction and eliminates the above-mentioned drawbacks.

The present invention has the above-mentioned configuration, in which the main screed is connected to the rear part of the finisher body by a first parallel interlocking mechanism having a side arm that can move up and down, and the sub-screed is connected to the main screed with the first screed. The main screed and the sub-screed are connected by a second parallel interlocking mechanism consisting of parallel links interlocked with the parallel interlocking mechanism, so that the main screed and the sub-screed can be moved up and down at the same inclination angle and height. ,
With the above configuration, the main screed and the sub-screed are always maintained at the same inclination angle and height, and the inclination angle of the main screed is changed by the inclination angle adjustment mechanism provided between the side arm and the main screed. Since the parallel interlocking mechanism automatically adjusts the sub-screed to the same inclination angle and maintains the same height as the main screed, the paving height by the main screed and the paving height by the sub-screed are always equal. Paving performance and reliability are significantly improved, and the inclination angle adjustment of the main and sub-screeds, that is, the paving height can be changed extremely easily and quickly, and work efficiency is significantly improved.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 4 shows a first embodiment of the present invention,
In the figure, 30 is a finisher main body, and 3 is a conveyor screw for spreading the asphalt mixture disposed at the rear of the finisher main body 3.A first side arm 31 and a second side arm 31 are attached to the left and right sides of the finisher main body 30, respectively. The arms 32 are connected by pivots 31a, 31a with a vertical interval,
The rear side is movable up and down, and a triangular link 33 is pivotally attached to the rear of the first side arm 31 and the second side arm 32 by pins 31b and 32b, forming a parallel link mechanism. The front middle part of the screed 35 is pivotally attached 32b to the rear part of the second side arm 32 by the pin, and the main screed 35 is pivotally attached 34 to the rear upper part of the main screed 35 by a pin.
The upper part of the threaded rod 38 is screwed into the cylindrical portion of the adjustment handle 38a, which is attached to the rear end of the first side arm 31 so that it can only rotate and tilt, so as to be able to move forward and backward, thereby forming a tilt angle adjustment mechanism. , second side arm 3
The main screed 35 is configured as a first parallel interlocking mechanism that moves up and down while maintaining a predetermined inclination angle with respect to the road surfaces G and L even if the rear portions of the screeds 1 and 32 move up and down.

Further, the front middle part of the sub-screed support 36a is pivotally attached 33a to the rear part of the triangular link 33, and the base end of the link 34, which is pivoted 34b to the rear upper part of the sub-screed support 36a, is connected to the triangular link 33. a pivot 34a with a pin, and the pivot 33a is located at the same height as the pivot 32b;
Secondary screed support 36 for main screed 35
a are connected by a parallel link mechanism, and one triangular link 33 of the parallel link mechanism is connected to the first triangular link 33.
By configuring the parallel link mechanism to be used in combination with the parallel link mechanism, the two parallel link mechanisms are linked, so that the main screed 7 and the sub screeds 8, 8 are linked to the first parallel link mechanism. They are connected by a second parallel interlocking mechanism.

Further, sub-screed main bodies 36b, 36b are fitted to both ends of the lower surface side of the sub-screed support 36a so as to be movable to the left and right, and a hydraulic cylinder 39 is installed between the sub-screed support 36a and the sub-screed main bodies 36b, 36b. The sub-screed main bodies 36b, 36b are arranged in relation to both ends of the main screed 35 as shown in FIG.
B is moved in the direction of the arrow C (Fig. 2) and the pavement width A can be changed and adjusted.
Subscreeds 36, 36 are configured.

The first embodiment shown in FIG. 4 has the above-mentioned configuration, so that the finisher main body 30 is moved to the left side in the figure at a constant speed and slowly, and the asphalt mixture is removed from the rear of the finisher main body 30. When the main screed 3 is continuously supplied and spread to a predetermined thickness on the road surfaces G and L by the conveyor screw 3,
5 and the sub-screeds 36, 36 slide on the asphalt mixture while keeping the same height with the same predetermined inclination angle, that is, the working angle, and the paved surface is similarly hardened and paved by their own weight, Paving height by main screed 35 and secondary screed 3
The pavement height B due to 6 and 36 becomes equal, and there is no step difference in the pavement width direction A.

In addition, when changing or adjusting the inclination angle of the screed to change the pavement height, use the adjustment handle 3.
When 8a is rotated, the threaded rod 3 screwed into it
8 is moved forward and backward, the inclination angle of the main screed 35 can be changed, and the sub screeds 36 and 36 are
4. Triangular link 33 and sub-screed support 3
6a, and the triangular link 33 does not rotate and its pivot points 32b, 33a are kept at the same height, so the sub screeds 36, 36 are connected to the main screed 35.
The screed automatically maintains the same inclination angle and the same height, making it extremely easy and quick to change and adjust the inclination angle of the screed, that is, the working angle. and reliability is significantly improved, and work efficiency is significantly increased.

To explain in detail the functions of the first parallel interlocking mechanism and the second parallel interlocking mechanism, even if the rear portions of the first and second side arms 31 and 32 move up and down, the triangular link 33 will not rotate due to its parallel link function. The main screed 35
Since the distance between the upper part of the rear wall and the rear end of the first side arm 31 is kept constant by the threaded rod of the inclination adjustment mechanism, the main screed 35 is not rotated but moves up and down at the same inclination angle. The secondary screeds 36, 36 are moved to the main screed 3 by the non-rotating triangular link 33 and the parallel link mechanism consisting of the triangular link 33 and the link 34.
5, the secondary screed 36,3
6 is moved up and down at the same angle of inclination and height as the main screed to obtain the above-mentioned effects.

Additionally, as shown in FIG.
When a is rotated, for example, the threaded rod 38 is advanced and the main screed 35 can be changed from the solid line position to the chain line position and its inclination angle can be adjusted. Since the sub-screeds 36, 36 are automatically adjusted to have the same inclination angle as the main screed 35, and the pivots 32b, 32a are at the same height, the height of the sub-screeds 36, 36 is also The tilt angle adjustment function as described above is obtained.

Next, FIG. 6 shows a second embodiment of the present invention, in which the triangular link is replaced with an L link compared to the first embodiment.
Configuration with type link 33', first side arm 3
The front upper part of the main screed 35 is pivoted to the rear of 1.
1'b configuration, a configuration in which the threaded rod 38 is pivotally attached 34'a to the rear middle part of the main screed 35, and an L-shaped link 33' to the front upper part of the sub-screed support 36a.
A link 34 is pivotally attached 33'a to the rear middle stage of the sub-screed support 36a.
However, the structure of the second embodiment also provides substantially the same effects as the first embodiment.

FIG. 7 shows a third embodiment of the present invention, which is different from the first embodiment in that a cylinder 44 is provided on the left and right side surfaces of the finisher main body 30, and a guide roller 43a is provided in the cylinder 44. Therefore, the sliding plates 43 guided in the vertical direction are connected, and the first side arm 31 and the second side arm 3
It is characterized by the structure in which the two pivots 31a and 32a are attached to the sliding plate 43,
The height positions of the pivots 31a and 32a are changed by operating the cylinder 44 to extend and retract the slide plate 43, thereby changing the height positions of the pivots 31a and 32a.
2, the triangular link 33 can raise or lower the rear end of the first side arm 31 without rotating, so the main screed 35 and the sub-screeds 36, 36 are also rotated accordingly. In addition to being able to change the same inclination angle, that is, the operating angle of both the main and sub-screeds and keeping them at the same height, the other configurations are the same as in the first embodiment, so similar effects can be obtained. It will be done.

Furthermore, FIG. 8 shows a fourth embodiment of the present invention, and compared to the first embodiment, the first side arm 3
The rear part of the second side arm 32 is pivotally attached to the front end of the link 33'' and the front middle part of the main screed 35, and the rear part of the second side arm 32 is attached to the link 33''.
It is characterized by a structure in which a pivot 33"a is attached to the rear part of the link 33" and a front middle part of the sub-screed support 36a, and the pivots 31b" and 33a" at both ends of the link 33" are kept at the same height. Therefore, the fourth
Even with the configuration of this embodiment, the same effects as those of the first embodiment can be obtained.

Furthermore, FIG. 9 shows a fifth embodiment of the present invention, in which a chain wheel 4 is used instead of the second side arm 32 in the fourth embodiment shown in FIG.
5, 46 and a chain 47, and a pivot 3 is provided on the base side of the first side arm 31.
A chain wheel 45 is fixed concentrically with point 1a, and link 3
A chain wheel 46 is fixed on the base side (left end in the drawing) of the chain wheel 3'' so as to be concentric with the pivot point 31b'', and the chain wheel 46
5 and 46, the chain wheels 45 and 46 and the chain 47 perform the same function as the second side arm 32 of each of the embodiments, and the first side arm 31 Even if the rear side of the link 33'' moves up and down, the link 33'' remains horizontal and the pivots 31b'' and 33a'' at both ends are kept at the same height and moved up and down, thereby achieving the first parallel interlocking in the first embodiment. Since the configuration corresponds to that of the mechanism and the second parallel interlocking mechanism, similar effects can be obtained.

Incidentally, the inclination angle adjustment mechanism consisting of the adjustment handle 38a and the threaded rod 38 in each of the above embodiments specifies the distance between the rear end of the first side arm 31 and the main screed 35, and changes the distance to adjust the distance between the main screed 35 and the rear end of the first side arm 31.
The mechanism is not limited to the one described above, and various other mechanisms can be used as long as the mechanism can change and adjust the inclination angle.

Although the present invention has been described above with reference to embodiments, it goes without saying that the present invention is not limited to such embodiments, and that various design modifications can be made without departing from the spirit of the present invention. .

[Brief explanation of drawings]

Fig. 1 is a side view showing a conventional screeding device for an asphalt finisher, Fig. 2 is a cross-sectional plan view of Fig. 1, Fig. 3A is an enlarged side view of only the screeding device part of Fig. 1, Fig. 3 B is a right side view of FIG. 3A, FIG. 4 is a side view showing the first embodiment of the present invention, FIG. 5 is an explanatory diagram of the operation of FIG. 4, and FIG. 6 is a second embodiment of the present invention. 7 is a side view showing a third embodiment of the present invention, FIG. 8 is a side view showing a fourth embodiment of the present invention, and FIG. 9 is a side view showing a fifth embodiment of the present invention.
It is a side view showing an example. 30: Finisher body, 31, 32: Side arm, 33, 33', 33'', 34: Link, 3
8, 38a: Tilt angle adjustment mechanism, 45, 46: Chain wheel, 47: Chain, α: Tilt angle.

Claims (1)

[Claims] 1 A main screed is connected to the rear of the finisher main body by a first parallel interlocking mechanism having a side arm that can move up and down, and a sub-screed is connected to the main screed by a parallel link interlocked with the first parallel interlocking mechanism. The main screed and the sub screed are connected by a second parallel interlocking mechanism so that they can be moved up and down at the same angle of inclination and height, and the main screed and the sub screed are connected by a second parallel interlocking mechanism, and A screed device for an asphalt finisher, characterized by being provided with a tilt angle adjustment mechanism that simultaneously adjusts the tilt angle of a sub-screed.