JP4328444B2 - Construction machine for thin pavement - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a construction machine for thin layer pavement suitable for thin layer pavement that spreads the road surface and smoothes the road surface.
[0002]
[Prior art]
Pavements include, for example, a thin pavement having a flat average thickness of 3 to 6 mm in addition to a general pavement having a flat average thickness of 30 mm or more.
[0003]
Thin pavement is intended to refresh and extend the life of light rubbing, aging road surfaces, light cracked road surfaces, and slippery road surfaces. There are advantages such as.
[0004]
[Problems to be solved by the invention]
A thin pavement is required to have a uniform finished surface because the leveling thickness is as thin as about 3 to 6 mm. The finished surface can be obtained by moving the working surface of the leveling plate at a certain height, so that a uniform finish surface can be obtained. If the machine moves up and down due to unevenness on the road surface, the leveling plate also moves up and down following it, making it difficult to obtain a uniform finished surface.
[0005]
In particular, the flat plate is set at a predetermined height from the road surface, and a slit method is adopted in which the gap from the tip of the flat plate to the road surface and the slit is the finish thickness, so it is easily influenced by road conditions. Currently, it is difficult to obtain a flat finished surface. Also, at the time of leveling, for example, if aggregates or oversized lumpes exceeding the specified size are mixed in the pavement, so-called drag is caused by the leveling plate, and there is a problem that recesses or grooves with poor appearance are created. Invite.
[0006]
For this reason, when obtaining aggregates from a quarry factory, care is taken not to mix aggregates exceeding a prescribed size, but in reality they are often mixed.
[0007]
In addition, a lump such as a remaining material remaining in the mixer may be mixed, causing a drag. The leveling surface that caused the drag is repaired manually.
[0008]
Because the repair work at this time is performed while the drag area is covered with a burner, it takes manpower, time and man-hours, and if it takes manpower, time and man-hours, the repair surface is not finished cleanly and it is said that we want to make the repair work zero Is an urgent need.
[0009]
Accordingly, an object of the present invention is to provide a thin layer pavement construction machine that can obtain a uniform finished surface without causing dragging.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, according to claim 1 of the present invention, at least a mixer for stirring and mixing the pavement material, and a lateral feed device for expanding the pavement material dropped on the road surface from the discharge chute of the mixer to the left and right. A leveling plate that flattens and spreads the pavement material pushed right and left, and below the mixer discharge chute is larger than a specified amount mixed in the pavement discharged from the discharge chute. The present invention is characterized in that a removing device for removing the aggregate and oversized lump with a sieve is provided.
[0011]
As a result, when pavement material is dropped from the mixer, if the aggregate or oversize lump is larger than the specified size in the pavement material, the removal device will prevent passage and A large one is dropped on the road. The dropped pavement material is pushed right and left by a lateral feed device, and is spread evenly by a flat plate. At this time, since there are no large aggregates or lumps in the pavement material, drag does not occur and a smooth and smooth surface can be obtained.
[0012]
According to claim 2 of the present invention, the removing device is a sieve provided with a vibrating body that prevents passage of aggregates or oversized lumps larger than specified.
[0013]
As a result, the sieve is vibrated by the vibrator, so that the dropped pavement is quickly applied to the sieve. At this time, aggregates or oversized lumps larger than specified remain on the sieve to be removed.
[0014]
According to claim 3 of the present invention, the removing device is divided into a plurality of sieves provided with the vibrators, and the divided sieves are independently detachably supported.
[0015]
As a result, by removing the divided sieve, it is possible to quickly process aggregates and oversized lumps having a size larger than a predetermined size remaining on the sieve. After the treatment, it can be used as a sieve without trouble by being set again. In this case, the sieve does not have a large amount of aggregate that causes dragging, so it is not necessary to frequently perform processing operations.
[0016]
Further, according to a fourth aspect of the present invention, the equalizing plates were formed into a predetermined thickness by an elastic member made of rubber or synthetic resin, etc., to include a working portion comprising a sequence thinner toward its destination edge To do .
[0017]
Thereby, the pavement material pushed right and left by the lateral feeding device is spread evenly by the flat plate. During this operation, the action part of the leveling plate is rubbed according to the leveling load from above and bent and leveled in a circular arc shape, so even if it moves up and down, it absorbs it by elastic deformation. To do. On the other hand, the pressing force from the pavement material acts on the action portion, but the pushing force is balanced with the pushing back force due to the elastic reaction force of the action portion, and a substantially constant pressure acts on the pavement surface. As a result, a flat finished surface can be obtained.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be specifically described with reference to FIGS. 1 to 6.
[0019]
FIG. 1 shows a side view of a room temperature thin layer pavement construction machine 1. On the machine base 3 of the room temperature thin layer pavement construction machine 1, a water tank 5, an emulsion tank 7, an aggregate hopper 9, a cement hopper 11, and a continuous mixer 13 are arranged in this order from the front, A spreader 15 is disposed behind the mixer 13.
[0020]
The water tank 5 contains water, the emulsion tank 7 outside thereof is asphalt emulsion, and the aggregate hopper 9 is fine bones such as screenings (about 2.5 mm top) and No. 7 crushed stone (about 5 mm). The material is cement and the cement hopper 11 contains cement.
[0021]
The water in the water tank 5, the asphalt emulsion in the tank 7, the fine aggregate in the aggregate hopper 9, and the cement in the cement hopper 11 are fed into the mixer 13 and stirred together in the mixer 13. Mixed. At this time, the water in the water tank 5 and the asphalt emulsion in the emulsion tank 7 are fed into the mixer 13 via a pipe (not shown).
[0022]
Further, the fine aggregate in the aggregate hopper 9 and the cement in the cement hopper 11 are fed into the mixer 13 via the transport conveyor 17 and are mixed by stirring from the central and left and right three-way discharge chute 18. The material is placed on the road surface 19 via the leveling machine 15.
[0023]
The spreader 15 is supported by a pulling chain 21 at the front and on both sides by a support arm 25 supported by a hydraulic device 23 so as to be movable up and down via a suspension chain 27. Therefore, when not in use, it is possible to move by raising the leveling machine 15 from the road surface 19 as shown in FIG.
[0024]
The spread leveling machine 15 includes a sieve 29 serving as a removing device, a lateral feed device 31 that pushes and spreads the paving material left and right, and a leveling plate 33 that leveles the surface.
[0025]
The sieve 29 is a vibration type sieve 29 divided into a center and a left and a right corresponding to the three-way discharge chute 18 serving as the inlet of the mixer 13, and the left and right are formed in the flange 35. It is detachably set on the body frame 37 independently.
[0026]
The divided vibrating sieve 29 is passed through a support frame 41 having a handle 39 on the left and right so that the screenings and fine aggregates of No. 7 crushed stone can pass through, preventing the passage of aggregates larger than that. While the mesh member 43 is provided, a pipe-like vibrator 49 is attached to the attachment portion 45 on the front end side by a fixing screw 47. In this embodiment, the sieve 29 is a vibration type including the vibrator 49, but is not necessarily limited to the vibration type. This is possible even without the vibrator 49.
[0027]
As shown in FIG. 4, the support frame body 41 of the sieve 29 is provided with a pair of front and rear clamping parts 51 made of vibration-proof rubber, and the clamping parts 51 are engaged with the support arms 53 provided on the body frame 37. As a result, a support state that also serves as a vibration proof is obtained, and can be removed by releasing the engagement with the handle 39.
[0028]
In the lateral feed device 31, two front and rear spiral shafts 57, 57 to which rotational power decelerated by the hydraulic motor 55 is applied are arranged substantially in parallel, and the spiral shaft 57 is rotated in the center by rotating the spiral shaft 57. It has a structure in which a spiral wing 59 is provided to spread the pavement material from the site to the left and right.
[0029]
The flat plate 33 is formed in a plate shape that is long in the vehicle width direction, and the material is made of an elastic member made of rubber or synthetic resin, and the action portion 34 that gradually becomes thinner toward the tip edge that is the lower end. Have.
[0030]
As shown in FIG. 7, the action portion 34 has a shape in which the front surface in the traveling direction is a substantially vertical surface 34 a and the rear surface side is a tapered surface 34 b, so that a thin state toward the tip edge serving as the lower end is obtained. It has become.
[0031]
In FIG. 2, 61 indicates a step, and 63 indicates a handrail.
[0032]
According to the room temperature thin pavement construction machine 1 configured in this way, the water in the water tank 5, the asphalt emulsion in the emulsion tank 7, the fine aggregate in the aggregate hopper 9, and the cement in the cement hopper 11 are used. Each of them is fed into the mixer 13, and in the mixer 13, the agitated and mixed pavement is dropped onto each vibrating screen 29 by the discharge chute 18. If aggregates and oversized lumps larger than the specified size are mixed in the dropped pavement, the passage is blocked and only the specified material passes. At this time, since a vibration is applied by the vibrator 49, a quick fluid is performed.
[0033]
After the pavement material dropped on the road surface 19 is pushed left and right by the lateral feed device 31, a thin pavement laid flat by the flat plate 33 is obtained.
[0034]
At this time, the flat plate 33 is rubbed against the pavement, and no dragging occurs because there is no mixing of large aggregates or oversized lumps during the rubbed operation. On the other hand, the action part 34 of the leveling plate 33 during leveling absorbs the vertical behavior during leveling by elastic deformation. Moreover, since the force by which the paving material pushes the action part 34 and the force (reaction force) that the action part 34 pushes back due to the elastic reaction force is balanced during spreading, the whole area can be spread evenly with a constant pressure. It becomes like this.
[0035]
In this case, if a fast-hardening asphalt emulsion is used, traffic can be opened in about 1 to 2 hours. Moreover, because it is installed at room temperature, it does not emit gas and is environmentally friendly.
[0036]
On the other hand, if aggregates or lumps accumulate on the mesh member 43, it can be easily treated by removing it with the handle 39. Since the processing cycle at this time does not accumulate rapidly, it does not need to be performed frequently.
[0037]
The thin layer pavement may be a heated thin layer pavement.
[0038]
【The invention's effect】
As described above, according to the construction machine for thin layer pavement of the present invention, when dropping the pavement material onto the road surface, aggregates or oversized lumps exceeding the size mixed in the mixer by the sieve are removed . The passage can be reliably prevented . As a result, drag by the flat plate does not occur, and the elastically deformable action part absorbs the vertical behavior, while the pressing force acting on the action part and the force (reaction force) to push it back are balanced. Therefore, it can be laid flat and leveled. As a result, a thin pavement with good appearance can be obtained.
[0039]
Moreover, since it can remove independently, the big aggregate etc. which accumulated on the sieve can be easily discharged | emitted outside.
[Brief description of the drawings]
FIG. 1 is a side view of an entire construction machine for thin pavement according to the present invention.
FIG. 2 is a schematic explanatory view of a spread leveling machine as viewed from above.
FIG. 3 is a schematic plan view of a vibrating sieve.
FIG. 4 is a schematic side view of a vibrating sieve.
FIG. 5 is a schematic side view of a spread leveling machine.
FIG. 6 is an explanatory view at the time of movement when the spreader is raised.
FIG. 7 is an enlarged explanatory view of a flat plate.
[Explanation of symbols]
13 Mixer 19 Road surface 29 Removal device (sieve)
31 Horizontal feed device 33 Flat plate

Claims (4)

A mixer that stirs and mixes at least the pavement material, a lateral feed device that spreads the pavement material dropped from the mixer discharge chute on the road surface to the left and right, and a flat plate that spreads the pavement material spread to the left and right evenly And a removal device for removing aggregates or oversized lumps larger than specified mixed in the pavement discharged from the discharge chute with a sieve. Construction machine for thin-layer pavement characterized by doing so.   2. The thin pavement construction machine according to claim 1, wherein the removing device is a sieve provided with a vibrating body that prevents passage of aggregates or oversized lumps larger than a specified size.   The thin layer according to any one of claims 1 and 2, wherein the removing device includes a sieve provided with a vibrating body divided into a plurality of pieces, and the divided sieves are independently and detachably supported. Paving machine. 2. The flat plate according to claim 1, wherein the flat plate has an action portion that is formed to have a predetermined plate thickness by an elastic member made of rubber, synthetic resin, or the like, and that gradually becomes thinner toward a leading edge . Construction machine for thin pavement.

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