JP2002206206A - Paving-material production device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To miniaturize the whole device by eliminating the need for a measuring tank. SOLUTION: The paving-material production device is composed of a measuring feed section 5 in which a feed screw 13, by which a feed corresponding to the number of revolution is obtained, is installed to the first rotating shaft 11 arranged along the bottom section of a hopper 9 and given independent revolving torque and an agitating mixing section 7 in which an agitating mixing blade 37 forwarding materials towards a charging port 45 is mounted on the second rotating shaft 29 connected and supported in series with the first rotating shaft 11, given independent revolving torque and arranged in a mixing drum 35, and a paving material is manufactured continuously.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pavement material manufacturing apparatus.

[0002]

2. Description of the Related Art In general, in a pavement material manufacturing apparatus, a truck is installed and set on a site having a size that allows a truck to freely enter and leave the hopper, and a weigher for weighing the aggregate dropped from the hopper. It has a structure having a tank and a mixer tank in which the measured aggregate and asphalt as a binder are put together and stirred and mixed. The stirring mixture for pavement that has been stirred and mixed in the mixer tank is transported to a construction site by, for example, a dump truck.

[0003]

The pavement material manufacturing apparatus requires a measuring tank for directly measuring the aggregate dropped from the hopper, and the mixer tank is agitated and mixed each time, so that the processing capacity is increased. In addition, there is a problem that the size of the entire apparatus is increased, for example, a large apparatus is required, the cost of the equipment is increased, and a large installation space is required.

Accordingly, an object of the present invention is to provide a pavement material manufacturing apparatus capable of reducing the size of the entire apparatus and moving to a construction site to manufacture a pavement material there.

[0005]

According to a first aspect of the present invention, there is provided a first rotating shaft and a first rotating shaft arranged along a bottom of a hopper and provided with independent rotating power. A weighing feed portion, which is mounted on a rotary shaft of the hopper, and is arranged in a mixing drum and a mixing drum provided with a discharge port which is connected to and communicates with a bottom discharge end portion of the hopper. A second rotating shaft that is provided with independent rotating power and is connected and supported in series with the first rotating shaft; a stirring / mixing blade attached to the second rotating shaft and sent out while stirring and mixing toward the discharge port; And a stirring and mixing section.

[0006] Thus, the aggregate put into the hopper is sent out along the rotation axis by the feed spiral. Since the feed amount at this time is determined by the rotation speed of the feed spiral, the feed amount of the aggregate to be sent to the stirring and mixing unit can be controlled by controlling and controlling the rotation speed without a measuring tank.

On the other hand, the aggregate sent into the stirring and mixing section is
For example, a specified mixture can be obtained by stirring and mixing the asphalt with the asphalt as a binder toward a dropping port using a stirring and mixing blade.

At this time, the state in which the stirring time is long by controlling the rotation speed of the second rotating shaft to be slow, for example,
From the point where a short stirring time is secured by fast control, by setting the rotation speed corresponding to the feed amount of the aggregate from the weighing feed unit, the desired specified stirring mixture can be continuously obtained. become. For this reason, a measuring tank is not required, and the stirring and mixing section is continuously taken out, so that it is not necessary to increase the size. Therefore, the size of the entire apparatus can be reduced.

According to a second aspect of the present invention, the weighing and feeding section and the stirring and mixing section are mounted on a carrier and set to be movable to a predetermined place.

[0010] This makes it possible to directly produce a pavement material at a construction site.

According to a third aspect of the present invention, the mixing drum has a drum diameter larger than the opening diameter of the bottom end of the hopper.

As a result, the aggregate sent out from the metering feed section is expanded in the mixing and mixing space in the mixing drum, so that an efficient mixing and mixing state can be obtained.
Even when the mixing amount temporarily increases, reasonable stirring and mixing can be performed.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be specifically described below with reference to FIGS.

FIG. 1 shows a pavement material manufacturing apparatus 3 mounted and set on a transport vehicle 1. Although not shown, the transport vehicle 1 can travel to a construction site by power from an engine.

The pavement material manufacturing apparatus 3 includes a metering feed section 5 and a stirring and mixing section 7.

The weighing feed section 5 includes a hopper 9 and a hopper 9
And a feed spiral 13 mounted on the first rotary shaft 11 and conveyed along the rotary axis (arrow A).

As shown in FIG. 3, the hopper 9 is open at the upper side, and both side walls have inclined surfaces descending toward the bottom 9a, and are fixed and supported by the carrier 1. From the upper opening of the hopper 9, a conveyor 1 such as a belt conveyor
5, aggregates such as soil, crushed stone, rubber, and the like are supplied, so that the aggregates can be supplied.

The first rotating shaft 11 has one shaft end protruding outside from the bottom wall surface of the hopper 9 and is rotatably supported via a bearing portion 17. The shaft end protruding outside has a pulley 19 are provided. A conductive belt 25 is wound around the pulley 19 between the pulley 19 and the motor pulley 23 of the drive motor 21, and rotational power from the drive motor 21 is supplied via the conductive belt 25.

As shown in FIG. 2, the other end of the first rotating shaft 11 is provided with a shaft hole 27 in a shaft end face, and a projecting shaft 31 of a second rotating shaft 29 described later is rotatable in the shaft hole 27. , The first rotary shaft 11 is secured in a connected and supported state in which the first rotary shaft 11 can rotate independently. The feed spiral 13 is the first
Are helically arranged along the rotation axis 11 and rotate to perform a feeding action along the rotation axis as shown by the arrow A.

The feed spiral 13 calculates an amount of feed at one rotation in the design stage and inputs the number of rotations of the first rotary shaft 11 to the control unit 33 to thereby feed the aggregate corresponding to the number of rotations. The amount is being sought.

On the other hand, the stirring and mixing section 7 is provided with a mixing drum 35 and a second rotating shaft 29 disposed in the mixing drum 35 and a second rotating shaft 29.
And a stirring / mixing blade 37 mounted on the rotating shaft 29 of FIG.

The mixing drum 35 is formed in a cylindrical shape, and its body is arranged along the transport direction and fixedly supported by the transport vehicle 1. One flange 35 of the mixing drum 35
a is butt-coupled to a coupling flange portion 39a of the bottom sending end portion 39 of the hopper 9. An input port 41 is provided in the vicinity of the butt joint area, and the input port 4 is provided.
1 is supplied with emulsion liquid asphalt as a binder from a tank 43 mounted on the carrier 1. The other end of the mixing drum 35 is provided with a discharge port 45 for taking out a mixture.

The second rotating shaft 29 is disposed along the same axis as the first rotating shaft 11, and one of them is connected in series with the first rotating shaft 11 due to the relationship between the shaft hole 27 and the projecting shaft 31 as described above. Connected to The other is rotatably supported by the bearing 45, so that the second rotating shaft 29 can be independently rotated.

A pulley 47 is provided at a shaft end protruding outward from the bearing portion 45, and a conduction belt 53 is wound around the motor pulley 51 of the driving motor 49, so that the conduction belt 53 is interposed therebetween. The rotation power from the drive motor 49 is provided.

The drive motor 49 is connected to the control unit 33.
Optimum rotation speed control based on the feed amount from the metering feed unit 5 is possible by the signal from

The stirring / mixing blade 37 is formed in a fan shape as shown in FIG. 4, and is fixedly set in a spiral shape at a predetermined pitch P with respect to the shaft peripheral surface of the second rotating shaft 29 to thereby provide stirring and mixing. It functions so that it may be sent out toward the drop outlet 45.

According to the paving material manufacturing apparatus configured as described above, the pavement material can be directly manufactured at the construction site by the transport vehicle 1, and the workability can be greatly improved.

On the other hand, the aggregate put into the hopper 9
It is sent out to the stirring and mixing section 7 by the feed spiral 13. At this time, the feed amount by the feed spiral 13 is determined by the number of rotations. Therefore, by controlling and controlling the number of rotations, a specified amount of aggregate to be sent to the stirring and mixing unit 7 can be obtained.

The aggregate fed into the stirring / mixing section 7 is stirred and mixed together with the asphalt from the charging port 41, and a specified stirring mixture mixed and stirred from the dropping port 45 is obtained.

At this time, the speed of the second rotating shaft 29 is controlled, for example, at a low speed to secure a state with a long stirring time, and the speed is increased to secure a state with a short stirring time. By setting the number of rotations to correspond to the amount of the aggregate fed from the feeding section 5, a specified stirred mixture can be continuously obtained.

In these series of operations, a measuring tank is not required, and a large stirring and mixing section is not required, so that the size of the entire apparatus can be reduced.

FIG. 5 shows a second embodiment of the stirring and mixing section 7.

That is, the mixing drum 39 is set to a drum diameter D larger than the opening diameter d of the bottom sending end portion 39 of the hopper 9.
It is assumed that.

The other components are the same as those shown in FIG.

Therefore, according to the second embodiment, the aggregate sent out from the metering feed unit 5 is expanded in the mixing and mixing space in the mixing drum 35, so that an efficient stirring and mixing state is obtained. In addition, even when the mixing amount temporarily increases, the stirring and mixing can be smoothly and smoothly performed.

[0036]

As described above, according to the first aspect of the present invention, the measuring and feeding section does not require a measuring tank, and the stirring and mixing section can be continuously taken out. As a result, the size of the entire apparatus can be reduced.

Further, according to the second aspect of the present invention, it becomes possible to directly manufacture a pavement material at a construction site, thereby greatly improving workability.

According to the third aspect of the present invention, the mixing drum having a large drum diameter expands the stirring and mixing space, so that an efficient stirring and mixing state can be obtained.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view of a pavement material manufacturing apparatus according to the present invention.

FIG. 2 is an enlarged sectional explanatory view of a portion A in FIG. 1;

FIG. 3 is a schematic explanatory diagram viewed from a weighing feed unit side.

FIG. 4 is a schematic explanatory view showing a part of an attached state of a stirring and mixing blade of a stirring and mixing section.

FIG. 5 is an enlarged cross-sectional explanatory view similar to FIG. 2, showing a second embodiment of a stirring and mixing unit.

[Explanation of symbols]

 Reference Signs List 5 Metering feed unit 7 Stirring / mixing unit 9 Hopper 11 First rotating shaft 13 Feeding spiral 29 Second rotating shaft 35 Mixing drum 37 Stirring / mixing blade 45 Dropout port

Claims (3)

[Claims] 1. A weighing feeder comprising a first rotary shaft arranged along the bottom of a hopper to which independent rotary power is applied, and a feed spiral mounted on the first rotary shaft and feeding out along the rotary axis. And a mixing drum provided with a discharge port in communication with the bottom end of the hopper and a discharge port provided therein. The mixing drum is provided with independent rotational power and is coupled and supported in series with the first rotary shaft. 2. A pavement material manufacturing apparatus, comprising: a stirring and mixing section mounted on a second rotating shaft and a stirring and mixing blade attached to the second rotating shaft and sent out while stirring and mixing toward the drop outlet. 2. The pavement material manufacturing apparatus according to claim 1, wherein the metering feeding section and the stirring / mixing section are mounted on a carrier and can be moved to a predetermined place. 3. The pavement material manufacturing apparatus according to claim 1, wherein the mixing drum has a drum diameter larger than an opening diameter of a bottom sending end portion of the hopper.