JPH0329363Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a dispersion device installed in an asphalt finisher or the like to spread asphalt mixture laterally.

[Conventional technology]

Generally, as an asphalt finisher used for paving roads, for example, one having a structure shown in FIG. 3 is known.

This asphalt finisher 1 charges asphalt mixture into a hopper 3 provided at the front of a traveling vehicle body 2, and while the traveling vehicle body 2 travels, the asphalt mixture is transferred to a bar feeder 4.
The screw feeder 5 spreads the asphalt mixture uniformly in the width direction of the road, and then the asphalt mixture is fed to the screw feeder 5 at the rear of the vehicle body 2. The road is paved by compacting it with a screed 6 provided at the rear of the road.

By the way, in the asphalt finisher 1 having the above-mentioned configuration, since the length of the screw feeder 5 is constant, the dispersion width of the asphalt mixture is restricted, and the dispersion width corresponding to changes in the road width is limited. The problem is that changes cannot be made quickly.

Therefore, as an asphalt finisher capable of solving the above-mentioned problems, an asphalt finisher described in Japanese Utility Model Publication No. 60-5053 has been proposed.

As shown in FIGS. 4 and 5, this asphalt finisher has a pair of left and right screws attached to the support arm 7 of the vehicle body 2, which are displaced from each other in the longitudinal direction and movable in the width direction of the vehicle body 2. By moving the pair of screw feeders 5 and adjusting the amount of protrusion from the side of the traveling vehicle body 2, the dispersion width of the asphalt mixture can be adjusted to the width of the road. It is designed to change according to changes in width.

In addition, there are other types that use a screw feeder in which elastic blades are attached to a screw shaft that is spline-coupled.
26705 (Japanese Utility Model Publication No. 1987-140308), or one in which a plurality of screw units are elastically connected by splines (Japanese Utility Model Publication No. 140308/1983) has also been proposed.

[Problem that the invention attempts to solve]

However, in the asphalt mixture dispersing apparatus shown in FIGS. 4 and 5, the asphalt mixture is transferred in the right and left screw feeders 5 in the directions indicated by arrows A and B, respectively. Since they are in one direction and in opposite directions, the flow of the asphalt mixture in the overlapped portion of the two becomes complicated, which worsens the dispersibility of the asphalt mixture and also causes the screw feeder 5 to rotate. The problem is that a large amount of power is required for this purpose.

Further, a screw shaft in which the screw shaft is configured to be extendable and retractable by spline connection has a major problem in that the asphalt component clogs the spline portion and easily causes a failure.

The present invention is an asphalt mixture dispersion device that can easily and quickly change the dispersion width of the asphalt mixture, and can vary the degree of dispersion of the asphalt mixture in the width direction of the road surface, with less failure. The purpose is to provide

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a means for transporting the asphalt mixture transported by the transport means behind the transport means for transporting the asphalt mixture. A left front screw feeder for transporting the vehicle from the center in the width direction of the vehicle body to the left side and a right front screw feeder for transporting the vehicle to the right side are provided with their axial directions aligned with each other from side to side. Behind the left rear screw feeder is a left rear screw feeder that receives the asphalt mixture sent leftward by the left front screw feeder and transfers the asphalt mixture to the left, and the right front screw feeder A support that moves along the guide rail behind the right rear screw feeder that receives the asphalt mixture sent to the right by the right front screw feeder and transfers the asphalt mixture to the right. The arm and the connecting arm are respectively supported so as to be movable to the left and right with their axial directions aligned with each other in the left and right directions, and the first rotary motor is individually connected to both the front screw feeders. ,
Further, a second drive motor is connected to each of the rear screw feeders individually.

[Effect]

The asphalt mixture transported by the transport means is transported left and right by the front screw feeder, and then further transported left and right by the rear screw feeder and spread on the road surface. When adjusting the amount of dispersion of the asphalt mixture in the width direction of the road surface, the rotational speed of the pair of left and right rear screw feeders is individually and relatively changed in the same way as the pair of left and right front screw feeders.

When changing the dispersion width of asphalt mixture,
This is done by moving the rear screw feeder in the width direction of the vehicle body.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

In the following explanation, the same reference numerals are used for the parts common to those in FIGS. 3 to 5, and the explanation thereof will be omitted.

First, the outline of this embodiment will be explained.

It is attached to the rear of the traveling vehicle body 2 of the asphalt finisher 10 and distributes the asphalt mixture in the width direction of the road and spreads it uniformly on the road.
The dispersion device S of this embodiment includes a pair of left and right front screw feeders 11, 11a, 11b disposed at the rear of a traveling vehicle body 2 along its width direction, and A pair of left and right rear screw feeders 12, 12a arranged at the rear,
12b, and has a schematic configuration in which the pair of rear screw feeders 12, 12a, 12b are individually movably mounted in the width direction of the vehicle body 2.

Next, to explain these details in detail, the front screw feeder 11 includes a left front screw feeder 11a that conveys the asphalt composite material from the center in the width direction of the traveling vehicle body 2 to the left side, and a left front screw feeder 11a that conveys the asphalt mixture to the right side. Further, both front screw feeders 11a, 11b are configured by a right front screw feeder 11b.
The width is set to be approximately the same as the width of the bar feeders 4 (the length in the width direction of the traveling vehicle body 2) near the composite material outlet of a pair of bar feeders (conveying means) 4 that feed asphalt composite material to the bar feeders 4. Both front screw feeders 11a and 11b have their axial directions aligned with each other in the left and right directions.

And each front screw feeder 11a, 1
1b is rotatably attached between a plurality of support plates 14 to which a rear frame 13 of the traveling vehicle body 2 is integrally attached, and a chain sprocket 15 is integrally attached to one end of each. A power transmission chain 16 is wound around each of these chain sprockets 15.

On the other hand, each of the front screw feeders 11a,
Above 11b, a drive motor 17 for rotating these is attached to a mounting base 17a which is vertically movable and adjustable to the frame 13 by means of adjustment bolts 13a and fixedly supported by bolts 13b. It is attached as one piece,
By winding each of the chains 16 around a sprocket 17a attached to the output shaft of the drive motor 17, each front screw feeder 11a,
The rotational force is transmitted to 11b to rotate these individually.

Further, the rear screw feeder 12 is constituted by a left rear screw feeder 12a and a right rear screw feeder 12b, and each of the rear screw feeders 12a, 12b has left and right sides in the lateral direction of each other. Front screw feeder 1 to match
1a, 11b, and the axis of rotation thereof is parallel to the front screw feeders 11a, 11b.
The helical directions of the screw feeders 11a and 11b are arranged so that their respective conveyance directions are the same as the conveyance directions of the front screw feeders 11a and 11b located in front. It is set.

And these rear screw feeders 12
One end (outer end) of a, 12b is the support arm 1
8 via a bearing device 18a, and connected to the output shaft of a drive motor 18b attached to the support arm 18 via a pair of bevel gears (not shown) in the bearing device 18a. The other end (inner end) is rotatably supported by the connecting arm 20 via a bearing 19.

Further, the support arm 18 and the connection arm 20 are attached to a pair of slide plates 22 that are slidably supported along the width direction of the vehicle body 2 by guide rails 21 that are horizontally attached to the frame 13. The rear screw feeders 12a, 12b are connected to the slide plate 2 through a bracket 23.
2, and is held at the diagonally rear lower part of the front screw feeders 11a and 11b as described above, and is supported so as to be movable in the width direction of the traveling vehicle body 2.

A threaded rod 32 attached to the upper end of the guide rail 21 is inserted through a support piece 33 fixed to the frame 13, and a pair of nuts 34 screwed onto the threaded rod 32 are rotated at the top and bottom of the support piece 33. By doing so, the position of the fixing piece 35 fixed in the left-right direction of the guide rail 21 can be adjusted vertically within the range of the elongated hole 36 for bolt insertion, and the bolt can be inserted into the elongated hole 36 at the required adjustment position. It is fixed to the frame 13 with bolts 37.

Stays 24 are attached to the guide rail 21 at positions that sandwich the slide plate 22 above and below, and between these stays 24, an actuator 25 such as a fluid pressure cylinder is connected via a connecting member 26. It is attached along the width direction of the traveling vehicle body 2.

The movable rod 27 of this actuator 25 is
The rear screw feeders 12a and 12b are connected to the slide plate 22 via a bracket 28, so that the rear screw feeders 12a and 12b can be reciprocated together with the slide plate 22 in the width direction of the vehicle body 2. There is.

Furthermore, in this embodiment, as shown in FIG. 2, a drive shaft 29 for driving the bar feeder 4 is disposed at the obliquely front lower part of the front screw feeders 11a, 11b.

A chain sprocket 30 is integrally provided at the inner end of the drive shaft 29, and a pair of drive sprockets 4a meshed with the bar feeder 4 are integrally provided at the inner and outer ends. Each drive motor 17 of the chain sprocket 30 and the front screw feeder 1 are provided.
1a, 11b is wound around the front screw feeder 11a, 11b.
The drive motor 17 rotates the drive motor 17 at the same time.

On the other hand, what is designated by the reference numeral 31 in FIG. It can be selectively attached to the screw feeders 12a, 12b as needed.

Next, the operation of the dispersion device of this embodiment configured as described above will be explained as follows.

The bar feeder 4, front screw feeders 11a, 11b, and rear screw feeders 12a, 12b are rotated by driving the vehicle body 2 on the road to be paved and driving the respective drive motors 17, 18b. let

If the width to which the asphalt mixture is to be distributed is the entire length of the front screw feeders 11a, 11b, move the rear screw feeders 12a, 12b as far inward as possible in the traveling vehicle body 2, and The auxiliary screw feeder 3 is superimposed over the entire length of the partial screw feeders 11a and 11b.
Remove 1.

The flow of asphalt mixture in such a setting is as follows.

The asphalt mixture conveyed from the hopper 3 to the rear part of the traveling vehicle body 2 by the bar feeder 4 is supplied to each front screw feeder 11a, 11b.
1b, the excess portion is transferred to the left and right in the width direction of the traveling vehicle body 2, and is transferred to the rear screw feeder 12 on the outside of the exit of the bar feeder 4.
a, 12b on the road in front of the bar feeder 4, and the required portion is dropped from the front screw feeder 11a, 11b onto the rear screw feeder 12a, 12b near the entrance of the bar feeder 4, and These rear screw feeders 1
2a and 12b, similarly to the front screw feeders 11a and 11b, the material is transferred and distributed to the left and right in the width direction of the vehicle body 2, and spread uniformly on the road.

Here, each front screw feeder 11a, 1
1b moving direction and rear screw feeder 12
Since the moving directions of a and 12b are set in the same direction on both sides of the center line in the width direction of the traveling vehicle body 2, even if the two are completely overlapped, Transfer direction is traveling vehicle body 2
in the same direction on each of the left and right sides,
The flow of the asphalt mixture follows a substantially single trajectory on each of the left and right sides of the traveling vehicle body 2, as shown by arrows C and D in FIG.

Therefore, the asphalt mixture is transferred smoothly, and the front screw feeder 11
a, 11b and rear screw feeder 12a, 1
2b is prevented from accumulating in the asphalt mixture at the overlapped portion with the front screw feeder 1.
1a, 11b and rear screw feeder 12
By reducing the rotational resistance of a and 12b, the power required for driving them can be reduced.

Furthermore, in this embodiment, the rear screw feeders 12a, 12b are replaced with the front screw feeders 11
Since it is located below the bar feeders 11a and 11b, the excess asphalt mixture near the outlet of the bar feeder 4 is deposited on the front screw feeders 11a and 11b.
11b, and only the required part of the asphalt mixture is transferred to the front screw feeder 11.
a, 11b to rear screw feeder 12a,
As a result, the smoothness of the flow of the asphalt mixture is further improved, and each screw feeder 11a, 11
The power required to drive b, 12a, and 12b is reduced.

On the other hand, when changing the dispersion width of the asphalt mixture due to a change in the width of the road, etc., the actuator 25 moves each of the rear screw feeders 12a and 12b individually, and these traveling vehicle bodies 2 This can be dealt with by adjusting the amount of protrusion toward the sides.

In this way, the rear screw feeder 12a, 1
When 2b protrudes to the side of the traveling vehicle body 2, the amount of overlap with the front screw feeders 11a and 11b changes, but even if this amount of overlap changes, as described above, the transfer direction There is no change in the asphalt mixture, and therefore, smooth dispersion of the asphalt mixture is maintained.

In addition, if the amount of asphalt mixture conveyed by the bar feeder 4 changes, rotate the nut 34 to move the guide rail 21 to the frame 13.
Raise and lower each rear screw feeder 12
The heights of a and 12b above the road surface are adjusted to accommodate the above change.

Furthermore, for example, when it is desired to spread the asphalt mixture thickly in the center of the road, it is possible to slow down the rotation of the rear screw feeders 12a and 12b to reduce the amount of asphalt mixture transferred to the left and right. Front screw feeder 1 according to conditions
1a, 11b and rear screw feeder 12a,
12b is relatively adjusted. In addition, if the pavement widths on the left and right sides are different, the amount of protrusion of the left rear screw feeder 12a and the right rear screw feeder 12b is changed according to the pavement width, and the front screw feeder 11a, 11b and rear The rotational speeds of the screw feeders 12a and 12b are individually and relatively adjusted to equalize the amount of dispersion of the asphalt mixture in the width direction of the road.

It should be noted that the shapes and detailed dimensions of each component shown in the above embodiments are merely examples.
Various changes can be made based on changes in the shape or design requirements.

[Effect of idea]

As explained above, the dispersion device for asphalt composite material in an asphalt finisher or the like according to the present invention is capable of dispersing asphalt composite material, which has been conveyed by the conveyance means, to the rear of the conveyance means for conveying the asphalt mixture to the vehicle body. A left front screw feeder that transfers to the left side from the center in the width direction and a right front screw feeder that transfers to the right side are provided with their axial directions aligned with each other from side to side, and the left front screw feeder is At the rear, there is a left rear screw feeder that receives the asphalt mixture sent to the left by the left front screw feeder and transfers the asphalt mixture to the left, and also the right front screw feeder. Behind the right rear screw feeder, which receives the asphalt mixture sent to the right by the right front screw feeder and transfers the asphalt mixture to the right, moves along the guide rail. The supporting arm and the connecting arm are respectively supported by the supporting arm and the connecting arm so that their axial directions are aligned with each other in the left and right directions, and are provided so as to be movable individually in the left and right directions.
The first rotary motors are individually connected to both the front screw feeders, and the second drive motors are individually connected to both the rear screw feeders. By moving each rear screw feeder individually and adjusting the amount of protrusion from the left and right sides of the traveling vehicle body, the distribution width of the asphalt mixture on both the left and right sides of the traveling vehicle body can be easily and quickly changed. be able to.

In addition, since the transport direction of the asphalt mixture is the same in the entire overlapped area between the front screw feeder and the rear screw feeder, it is particularly possible to prevent the asphalt mixture from accumulating in the overlapping area of the two. The flow becomes smooth, and the rotational resistance given to each screw feeder by the asphalt mixture is reduced as much as possible, and as a result, the driving force required for dispersing the asphalt mixture can be significantly reduced.

Furthermore, the relative rotational speed of the pair of left and right front screw feeders and the pair of left and right rear screw feeders is individually changed to adjust the amount of asphalt mixture transferred in the road width direction according to the paving conditions. Fine adjustments can be made easily and better paving can be achieved.

[Brief explanation of drawings]

In the drawings, FIGS. 1 and 2 show one embodiment of the present invention, and FIG. 1 is a front view of the main parts seen from the rear of the vehicle body, and FIG. 2 is a diagram taken along the - line in FIG. FIG. Figures 3 to 5 show an example of a conventional asphalt finisher. Figure 3 is a side view, Figure 4 is a schematic side view with the main parts enlarged, and Figure 5 is a schematic enlarged view of the main parts. FIG. 2... Traveling vehicle body, 4... Bar feeder (transfer means), 11a, 11... Left front screw feeder, 11b, 11... Right front screw feeder, 12a, 12... Left rear screw feeder , 12b, 12... Right rear screw feeder, 17... Drive motor, 18... Support arm,
18b... Drive motor, 20... Connection arm, 2
1...Guide rail.

Claims (1)

[Scope of utility model registration request] A left front screw feeder 11a that transports the asphalt mixture transported by the transport means 4 to the left side from the center in the width direction of the traveling vehicle body 2, located behind the transport means 4 that transports the asphalt mixture;
Right front screw feeder 11b transferred to the right side
and are provided with their axial directions aligned to the left and right,
Behind the left front screw feeder 11a is a left rear screw feeder that receives the asphalt mixture sent leftward by the left front screw feeder 11a and transfers the asphalt mixture to the left. 12a, and behind the right front screw feeder 11b is a right rear portion that receives the asphalt mixture sent rightward by the right front screw feeder 11b and transfers the asphalt mixture to the right. The support arm 18 on which the screw feeder 12b moves along the guide rail 21
A first rotary motor 17 is provided on the front screw feeders 11a and 11b, and is supported by the connecting arm 20 with their axial directions aligned with each other in the left and right directions so as to be movable individually in the left and right directions. are individually connected to each other, and a second drive motor 18 is connected to both rear screw feeders 12a, 12b.
An apparatus for dispersing asphalt mixture in an asphalt finisher or the like, characterized in that b are individually connected.