JPS6011130Y2 - Leveling equipment for asphalt finishing, etc. - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a front and back multi-stage screed type leveling device that is installed in a leveling machine such as an asphalt finisher or base paper.

As is well known, in asphalt finishers,
As shown in Fig. 1, while the vehicle body 1 is running, the asphalt material put into the hopper 2 is sent to the rear spreading screw 4 by the bar feeder 3, where it is spread uniformly from side to side and then screeded. It is laid flat.

By the way, when paving a wide road, there is a method of having one main screed 5 and attaching auxiliary screeds 6 on the left and right sides of it as shown in Fig. 2, or a method of paving the same main screed 5 as shown in Fig. 3. There is a method in which a screed 5 is provided, wideners 7 are telescopically attached to the left and right sides of the screed using hydraulic cylinders, and the construction width is changed by adjusting the widener 7.However, in the former method, the auxiliary screed 6 is not easy to attach and detach. However, the latter has drawbacks such as the difference in leveling finish between the screed 5 and the widener 7 because the widener 7 does not have a compaction function.

In order to eliminate these drawbacks, a two-stage front and rear screed type screed is used in which a front screed 8 and a rear screed 9 are arranged alternately on the left and right, as shown in FIG.

However, in the conventional device of this kind, the support arm 10
Since the main frame 11 is attached to the main frame 11 and the strike-off angle a is set by adjusting the rotation of the main frame 11 around the support shaft 12, there is a step d between the front screed 8 and the rear screed 9 as shown in the figure. As a result, a step is formed on the finished surface of each screed 8, 9.

This invention solves the above-mentioned drawbacks of the conventional method, and makes it possible to obtain a uniform paved surface without creating any level differences in the finished surface.Moreover, it is easy to adjust the height of the screed for this purpose, and it can also be adjusted to attach a crown. The purpose of this invention is to obtain a leveling device that can perform the following steps.

An embodiment of this invention will be described below with reference to the drawings.

FIG. 4 is a plan view of the leveling device of this invention.

Reference numeral 13 denotes a support arm whose one end is attached to a traveling vehicle body (not shown) so as to be able to pivot up and down, and whose other end extends to the rear of the traveling vehicle body; 14 is a main frame; this main frame 14 includes: Front force support arm 13. Support shaft 1 on 13
5.15, and the rear side is connected to a support arm 13.13 by a main frame vertical adjustment screw 16.16, so that it can be rotated around a support shaft 15.15.

Two screed frame bodies 17 and 17' are attached to the main frame 14 at the front and rear, and one space apart on the left and right sides.

That is, the right side 1 on the front side of the main frame 14
Two pairs of bearings 18 are provided on the back side of the central portion 14a and the central portion 14b, respectively.
a, 18b are fixed, and a pair of guide pipes 19.19 are fixed along the width direction to the front screed frame 17, and this pair of guide pipes 19.19 slide on the bearings 18a, 18b. The screed frame 17 is supported so that it can slide left and right.

The hydraulic cylinder 2 fixed to the main frame 14
0 rod 20a is connected to the screed frame 17, and the screed frame 17 is moved and adjusted from side to side by this hydraulic cylinder 20.

Similarly, on the rear side of the main frame 14, the rear screed frame 17' slides left and right by two pairs of bearings 18'a and 1B'b provided on the back side of the left side part 14c and the center part 14b. It is movably supported and its movement is adjusted by the expansion and contraction of a rod 20'a of a hydraulic cylinder 20' fixed to the main frame 14.

In this way, the screed frames 17 and 17' in the front and rear stages can respectively protrude and retract to the right or left to change the screed side.

As shown in FIG. 5, screed plates 21 and 21 are respectively attached to the screed frames 17 and 17' so that their heights can be adjusted.

That is, a total of four female threaded blocks 24, 25 are fixed to a pair of inner and outer brackets 22, 23 fixed to the front and rear walls of each screed frame 17, 17', respectively. A pair of inner and outer adjustment threaded rods 26, 26', 27, 27' are individually screwed into 24 and 25 so as to be vertically movable.

The upper and lower parts of the adjusting screw rods 26, 26', 27, 27' are connected by ball joints 28, 29.

Brackets 30, 31 fixed to the front and rear of the screed plate 21 are pivotally supported at the lower ends of each set of four adjustment screw rods 26, 26', 27, 27' of each screed frame 17, 17'. 32.33.

In addition, both adjusting screw rods 26, 26', 27, 27' have
Indicating means for knowing the height adjustment allowance is provided, and for the front adjustment screw rods 26, 26', a disc-shaped indicator plate 34 and a screed frame 17, 17 are attached to the front adjustment screw rods 26, 26'.
For the rear adjustment screw rod 27, 27', a support rod 36 whose lower end plate portion 36a is supported by the shaft 33 and whose upper portion is passed through the guide 37. and a scale plate 38 fixed to the rear wall of the screed frame 17, 17'.

Next, to explain the operation and effect of the leveling device of the above embodiment, first, the main frame 14 is rotated around the support shaft 15 by operating the main frame vertical adjustment screw 16 to temporarily set the strike-off angle a. be able to.

In this case, a step d is created between the front screed plate 21 and the rear screed plate as in the conventional example shown in FIG.

Therefore, regarding the front screed plate 21, an inner adjusting threaded rod 26 on the front wall side of the screed frame 17, an outer adjusting threaded rod 26' on the front wall side, and an inner adjusting threaded rod on the rear wall side of the screed frame 17. 27. When each of the outer adjustment screw rods 27' on the rear wall side is adjusted by the same amount and lowered by the amount d, the front screed plate 21 is lowered by d while maintaining the same strike-off angle a, and the front and rear screed plates 21 are lowered by d while maintaining the same strike-off angle a. There is no difference in level between the screed plates 21,21.

Also, instead of rotating the main frame 14 using the main frame vertical adjustment screw 16, for example, an adjustment screw rod 26,
The strike-off angle can also be adjusted by adjusting only 26', 27, 27'.

In this case, adjust both the front and rear screed play) 21.21.

Furthermore, if you want to crown the paved surface, you can raise it by operating the inner adjustment screw rods 26, 27, or lower the outer adjustment screw rods 26', 27', and then adjust the crown to the front and rear screeds. When the front and rear screed plates 21.21 are tilted to the left and right, following the plates 21.21, a crown with a high center is formed on the paved surface.

In the above adjustment operation, the indicator plate 34 or the indicator stick 3
6 indicates the scale of the scale plate 35, 38, so that the desired height can be adjusted.

Also, when the screed plate 21 is tilted back and forth or left and right using the adjusting screw rods 26, 26', 27, 27', the adjusting screw rods 26, 27 have ball joints 28, 29 interposed between them. Therefore, the screed plate 21.21 can be bent freely at this portion, allowing the screed plate 21.21 to tilt without applying excessive force to the screed frame body 17.17'.

In addition, in this embodiment, the main frame 14 is attached to the support arm 13 so that the strike-off angle can be adjusted,
This main frame 14 has two stages of screed frames 1, front and rear.
7. Adjustable screw rods 26, 26' for adjusting the height of 17',
27, 27', the main frame 14 is fixed to the support arm 13, and the adjustment screw rods 26, 26', 2
7. Strike-off angle, crown angle (
It is also possible to adopt a structure in which the angle of inclination in the width direction is adjusted.

As explained above, in the leveling device of this invention, the screed plate is connected to the screed frame body by adjustment screw rods at four locations on the front, rear, left, and right sides, so that the height and the front and back directions of each of the front and rear screed plates are adjusted. You can adjust the inclination of the screen and the inclination in the left and right directions.

Therefore, it is possible to set the strike-off angle and the crown angle as desired, and unlike conventional screed plates, it is possible to eliminate the step difference between the front and rear screed plates, and it is possible to obtain a good paved surface.

Further, the adjusting means using the adjusting threaded rod has a simple structure, and the adjusting operation can be easily performed manually.

[Brief explanation of the drawing]

Figure 1 is a side view of an asphalt finisher equipped with a conventional leveling device, Figures 2 and 3 are explanatory diagrams of other conventional examples of leveling equipment, and Figure 4 is a side view of an asphalt finisher equipped with a conventional leveling device. A plan view of the apparatus, FIG. 5 is a schematic cross-sectional view taken along the line ■-v in FIG. 4. 14... Main frame, 17.17'...
...Screed frame, 21...Screed plate, 26, 26', 27, 27'...Adjustment threaded rod, 28°29...Ball joint.

Claims (1)

[Scope of utility model registration request] A plurality of screed frames 17 and 17' are connected to the main frame 1.
Each screed frame body 17.1 is attached to the main frame 14 in multiple stages in front and back and movably adjustable in the width direction of the main frame 14.
Female screw blocks 24.25 are provided at four locations on the front, rear, left and right sides of 7', and adjustment screw rods 26, 26', 27.27 whose upper and lower parts are connected by pole joints 28.29
' are individually screwed into the female thread blocks 24.25 so that they can be vertically freely screwed into each screed frame 17.1.
At the lower end of each set of adjustment threaded rods 26, 26', 27, 27' of A leveling device for an asphalt finisher, etc., characterized in that it is equipped with a screed plate 21 whose height, longitudinal inclination angle, and width direction inclination angle are adjusted by operation.