JPH0329362Y2 - - 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. Furthermore, since the pair of screw feeders 5 are disposed on substantially a single horizontal plane, there is a problem in that they protrude significantly toward the rear of the vehicle body 2.

Furthermore, 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 enables the dispersion width of asphalt mixture to be easily and quickly changed, the screw feeder does not protrude significantly to the rear of the traveling vehicle body, and the asphalt mixture dispersion device has less trouble. The purpose is to provide.

[Means for solving problems]

In order to achieve the above object, the present invention transfers the asphalt mixture carried by the conveyance means to the left side from the center in the width direction of the traveling vehicle body, behind the conveyance means for conveying the asphalt mixture. A left front screw feeder for transporting to the right side and a right front screw feeder for transferring 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 disposed diagonally at the rear lower part of the left front screw feeder. The left rear screw feeder receives the asphalt mixture sent to the left by the Eufeeder and transfers the asphalt mixture to the left. The right rear screw feeder, which receives the asphalt mixture sent to the right by the rear screw feeder and transfers the asphalt mixture to the right, is moved along a guide rail whose position can be adjusted up and down. The supporting arm and the connecting arm are provided with a support arm and a connecting arm that support each other with their axial directions aligned left and right, and are movable individually to the left and right. It has a configuration in which the motors are connected.

[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. The rear screw feeder is installed diagonally at the lower rear of the front screw feeder, so the installation interval between the front screw feeder and the rear screw feeder in plan view is narrowed, and the rear screw feeder is Protrusion toward the rear of the vehicle body can be kept small.

Furthermore, the height of the rear screw feeder from the road surface can be adjusted according to the thickness of the pavement to uniformly disperse the asphalt mixture. When changing the distribution width of the asphalt mixture, move 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, and 11b disposed along the width direction at the rear of a traveling vehicle body 2, and A pair of left and right rear screw feeders 12, 12a arranged at the rear,
12b, and the pair of rear screw feeders 12, 12a, 12b are disposed diagonally at the rear lower part of the front screw feeders 11, 11a, 11b and are individually driven to rotate. It has a general configuration in which it is attached movably in the width direction of the vehicle body 2.

Next, to explain these details, the front screw feeder 11 includes a left front screw feeder 11a that conveys the asphalt mixture 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, which is connected to the screw feeder 11, 12 from a hopper 3 provided at the front of the traveling vehicle body 2.
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. 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 direction of the screw feeders 11a and 11b is arranged to be lower than that of the screw feeders 11a and 11b, and the spiral direction thereof is the same as that 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
Transfer direction of 1b and rear screw feeder 12
Since the transfer 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
The direction is the same on both the left and right sides of the
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.

Also, when spreading the asphalt mixture, depending on the thickness of the pavement, the front and rear screw feeders 11, 11
By adjusting the rotations of a, 11b, 12, 12a, and 12b individually and independently, their rotations are maintained in an appropriate state, and from this point of view as well, the above-mentioned power can be reduced.

Furthermore, rear screw feeders 12a, 12
b is located diagonally at the rear lower part of the front screw feeders 11a, 11b, so that the asphalt composite material
b to the rear screw feeders 12a, 12b under its own weight, and the asphalt mixture is smoothly transferred between the two, further improving the smoothness of the flow of the asphalt mixture. By partially overlapping the rear screw feeders 12a, 12b below the screw feeders 11a, 11b, the rear screw feeders 12a, 12b are brought as close to the frame 13 as possible.

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, when the amount of asphalt mixture is reduced in order to reduce the thickness of the pavement, if the height of the rear screw feeders 12a, 12b from the road surface is too high, the rear screw feeders 12a, 12b
The asphalt mixture does not reach all the way to the outer edge of the road surface, resulting in an inconvenience that the pavement thickness on the side of the road surface becomes extremely thin. In such a case, the nut 34 is rotated to raise and lower the guide rail 21 relative to the frame 13, thereby adjusting the height of each rear screw feeder 12a, 12b from the road surface to be lower.

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 the invention] As explained above, the dispersion device for asphalt composite material in an asphalt finisher or the like according to the present invention disperses the asphalt material conveyed by the conveyance means behind the conveyance means for conveying the asphalt mixture. A left front screw feeder that transfers the mixed material from the center in the width direction of the traveling vehicle body to the left side and a right front screw feeder that transfers the mixed material to the right side are provided with their axial directions aligned with each other left and right, and the left front portion At the rear diagonal lower part of the screw feeder, there is also 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. At the rear diagonal lower part of the right front screw feeder, there is a 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. is supported by a support arm and a connecting arm that move along a guide rail whose position is adjustable up and down, with their axial directions aligned with each other in the left and right directions, and is provided so as to be movable individually in the left and right directions. Both front screw feeders and both rear screw feeders are connected to drive motors, so each rear screw feeder can be individually moved left and right to move the left and right sides of the vehicle. By adjusting the amount of protrusion from the part, it is possible to easily and quickly change the dispersion width of the asphalt mixture on both the left and right sides of the vehicle body.

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 smoother, and the rotational resistance exerted on 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, since the rear screw feeder is arranged diagonally at the rear lower part of the front screw feeder so that it can be adjusted up and down, the installation interval between the front screw feeder and the rear screw feeder in plan view can be adjusted. It is possible to suppress the protrusion of the rear screw feeder toward the rear of the vehicle body by filling it with
By adjusting the vertical position of the rear screw feeder according to the paving thickness of the asphalt mixture, the asphalt mixture can be dispersed even better.

[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,
At the rear diagonal lower part of the left front screw feeder 11a, there is a left rear screw that receives the asphalt mixture sent leftward by the left front screw feeder 11a and transfers the asphalt mixture to the left. A feeder 12a is located diagonally at the rear lower part of the right front screw feeder 11b to receive the asphalt mixture fed rightward by the right front screw feeder 11b and send the asphalt mixture to the right. The right rear screw feeder 12b to be transferred is supported by a support arm 18 and a connecting arm 20, which move along a vertically adjustable guide rail 21, with their axial directions aligned with each other from side to side. Both front screw feeders 1 are provided so as to be movable individually to the left and right.
1a, 11b and both rear screw feeders 12
An apparatus for dispersing asphalt mixture in an asphalt finisher or the like, characterized in that drive motors 17 and 18b are connected to a and 12b.