JP3289186B2 - Screed equipment for road paving machines - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screed device for a road paving machine.

[0002]

2. Description of the Related Art FIG. 7 is a side view of a conventional asphalt finisher. The screed section (the section indicated by the arrow A in FIG. 7) for leveling and compacting the pavement surface is composed of a front screed 1, a rear screed 2, and a swing type extension screed 3 in the traveling direction of the vehicle. 2 is provided with a side plate 4 for finishing the end of the paving surface and performing simple paving.

FIG. 8 is a plan view of the screed portion A of FIG. FIG. 8A shows the minimum pavement width, which is determined by the length L of the front screed 1. FIG. 8 (b) shows a state in which the rear screed 2 is extended to the maximum by a hydraulic cylinder, an electric cylinder, or the like, as is well known.
Is the maximum pavement width when the length is the same as the length L, and is L × 2. At this time, the side plate 4 is mounted on the outside of the rear screed 2, that is, on the side of the pavement surface.

FIG. 8C is a view showing a case where the pavement width is set to L × 2 or more. First, the side plate 4 attached to the rear screed 2 is removed. Next, the swing type extension screen is centered on the pin 5 connecting the rear screed 2 and the swing type extension screed 3.
Draw on the de 3 to paving surface endwise (see arrow a). Further, the side plate 4 is mounted on the swing type extension screed 3 which has been swung out, and the process is completed. Maximum paving width swing extract tension disk to L × 2 in this case
Two lengths L 'of the leads 3, that is, L × 2 + L ′ ×
2 is the largest.

In the prior art as shown in FIG. 8, FIG.
It takes time and manpower to attach and detach the side plate 4 when the state is set. The side plate 4 varies widely depending on the user's preference, and is too large to be attached or detached by one person, and heavy objects are also manufactured. In such a case, detachment may be performed by two persons or by using a machine such as a crane.

[0006]

SUMMARY OF THE INVENTION In a screed provided with a swing type extension of a road paving machine such as an asphalt finisher, a swing type extension screed 3 is provided on the machine center side of a rear screed 2 located behind a front screed 1. By mounting, the paving width can be arbitrarily changed from the front screed width L to L × 2 or more without detaching while attaching the side plate 4 to the outside of the rear screed 2 as in the related art. An object of the present invention is to make it possible to save labor for attaching and detaching the plate 4.

[0007]

In a rear screed telescopic screed device comprising a front screed, a rear screed and a swing type extension screed using a road paving machine such as an asphalt finisher, a swing type extension screed 3 is connected to a rear screed 2. The rear screed 2 can be extended to 2 L or more, which is twice the length L of the front screed 1, by mounting and swinging out toward the center of the machine. Further, the rear screed 2 is extended while the side plate 4 is attached to the end of the pavement surface of the rear screed 2, so that the pavement width can be twice or more twice the length L of the front screed 1.

[0008]

FIG. 1 is a diagram showing the configuration of the present invention. FIG. 1A shows the minimum pavement width, which is determined by the length L of the front screed 1 as in FIG. 8A. FIG.
(B) shows a state where the rear screed 2 is extended to the same position as in FIG. 8 (b), that is, L × 2 by a hydraulic or electric cylinder or the like.
The side plate 4 is mounted on the end of the pavement surface of the rear screed 2.

FIG. 1C shows a case where the pavement width is L × 2 or more. Riyasukurido 2 and swing type extract tension screed 3 swing extract tension screed 3 about a pin 5 linking the toward the machine center direction draw on as indicated by the arrow a. Then, by the same procedure as that of FIG. The maximum pavement width in this case is L × 2 + L ′ as in FIG.
× 2.

Thus, the front screed 1, the rear screed 2, the swing type extension screed 3
1) The rear screed 2 can be extended to a length L × 2 or more twice as long as the length L of the front screed 1; 2) The swing type extension screed 3 is The operation of swinging the side plate 4 toward the center of the machine 2 eliminates the work of detaching and attaching the side plate 4 as in the related art.

An example of how the rear screed 2 extends more than twice the length L of the front screed 1 will be described with reference to FIGS. 2, 3, 4 and 5. FIG. FIG. 2 shows FIG.
(A) is a detail of the lower half of the machine center (the side plate 4 is omitted). FIG. 3 shows details of the lower half of the machine center in FIG. 1C (the side plate 4 is omitted).
4A is a cross-sectional view as viewed in the direction of the arrow A in FIG. 3, FIG. 4B is a cross-sectional view as viewed in the direction of the arrow B in FIG. 3, and FIG. FIG. 5 (d)
3 is a view as viewed from the direction of the arrow D in FIG. 3, (e) is a view as viewed from the direction of the arrow E, and (f) is a view as viewed from the direction of the arrow F. FIG. 6 is a sectional view taken in the direction of arrow G in FIG.

In FIG. 3, the front screed 1 is a frame 6
And a frame 8 parallel to this and a frame 7 inside the frame 8 are integrally formed. Rear screed 2
Is integrally formed with a frame 9 and a frame 10 parallel to the frame 9, and two parallel guide pipes 14 and 15 are fixed between the frames 9 and 10. Between the front screed 1 and the rear screed 2 are a pair of parallel frames 11 and 13, and a frame 12 inside the frame 13. Guide pipes 16 and 17 parallel to each other are fixed between the frame 11 and the frame 13 (the frames 12 and 13 are frames 12a and 12b and 1).
2c (FIG. 4B). The telescopic device uses a telescopic cylinder 18 (FIG. 4A).

(Operation) To extend from the state of FIG. 2 to FIG. 3, first, the telescopic cylinder 18 is used to extend the position to the position indicated by the arrow B in FIG. At this time, guide pipes 16 and 1 connecting frames 11 and 13 are connected.
7 is a bush 19 attached to the frames 7 and 8,
20 (positions D and E in FIG. 5). Next, it is extended to the position indicated by the arrow A in FIG. 3 by the telescopic cylinder 18. At this time, the guide pipes 14 and 15 are
The bushes 21 and 22 (position B in FIG. 4; see also position C to FIG. 4) attached to the bushings 2 and 13 support the bushing.

[0014]

According to the first aspect, the front screed 1, the rear screed 2, and the swing type extension screed are provided .
The length of the Creed 3 is the same as that of the conventional, it is possible to extend the Riyasukurido 2 at least twice the front screed 1. In addition, in the swing type extension screed of road paving machines such as asphalt finishers,
A swing-type extension screen is located on the machine center side of the rear screed 2 located behind the front screed 1.
By mounting the de 3, not desorbed while attached to the side plate 4 to the outside of Riyasukurido 2, the paving width optionally varying the L × 2 or more from the front screed L can paving, desorption of the side plate 4 No more work required.

[Brief description of the drawings]

FIG. 1 shows a configuration of the present invention, wherein (a) is a minimum pavement width ,
(B) a state in which twice the width of the stretched out Riyasukurido (a), (c) is a diagram showing a method of the shop 設幅 at least twice the front screed.

FIG. 2 is a detailed view of a lower half of the machine center of FIG. 1 (a).

FIG. 3 is a detailed view of a lower half of the machine center of FIG. 1 (c).

4A is a cross-sectional view of FIG. 3A, FIG. 4B is a cross-sectional view of B, and FIG.

5 (d) is a sectional view taken along line D in FIG. 3, FIG. 5 (e) is a sectional view taken along line E, and FIG.

FIG. 6 is a view on arrow G of FIG. 3;

FIG. 7 is a side view of a known asphalt finisher.

[8] a plan view of the screed unit, (a) shows the minimum shop setting
Width, (b) the maximum shop set when stretched Riyasukurido
Width, shows the expansion width method when increasing the (c) further shop 設幅.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Front screed 2 Rear screed 3 Swing type extension screed 4 Side plate 5 Pin 6-13 Frame 14-17 Guide pipe 18 Telescopic cylinder 19-22 Bush

Claims (2)

(57) [Claims] 1. A rear screed type screed device comprising a front screed, a rear screed and a swing type extension screed using a road paving machine such as an asphalt finisher, wherein a swing type extension screed (3) is rear screed (2). The rear screed (2) and the front screed (1)
A screed device for a road paving machine characterized in that it can be extended to twice (2L) or more the length (L) of the road paving machine. 2. The rear screed (2) is extended while the side plate (4) is attached to the end of the pavement surface of the rear screed (2), and the length (L) of the front screed (1) is twice (L). The screed device for a road paving machine according to claim 1, wherein the paving width can be set to 2L) or more.