JPH067042Y2 - Zero scraper - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Use) The present invention relates to a zero-rubber for mounting on a paving work vehicle such as an asphalt finisher to perform zero-rubbing between a roadway and a sidewalk.

(Prior art) For pavement of roads, work is performed by laying asphalt with a work vehicle such as an asphalt finisher and finishing the pavement surface.

In the past, the sidewalk surface and the road surface were set to almost the same level. However, each time the road is repaired, the sidewalk surface is also raised, which causes problems such as walking obstacles and waste of paving material. For this reason,
The connecting part between the sidewalk and the roadway was formed into a tapered surface, and the standard was revised so that the level of the sidewalk does not change even if the height of the roadway surface changes. As a result, the work of zero rubbing has come to be performed in order to form a tapered surface between the sidewalk and the road.

This zero-rubbing work is currently all done manually by workers.

(Problems to be solved by the invention) By the way, the above-mentioned zero rubbing work has the following problems.

Since the zero-rubbing operation is performed manually, unevenness is caused in the pavement thickness, the tapered surface is not formed uniformly, and the appearance of the finish is deteriorated. Further, if a uniform taper surface is not formed, there is a problem that it becomes wavy or uneven, which is dangerous when considering traffic safety.

Further, the work efficiency is low and it takes time, so that there is a problem that the cost is high.

In order to solve the above problems, a support body fixed to a side surface of a main body of an asphalt finisher and a lower end edge of the support body is rotatably fixed at one end, and a roadway portion and a sidewalk portion of a paved road. There has been proposed a zero-rubbing device that has a pressing plate that performs zero-rubbing so as to connect to each other and a turnbuckle that adjusts the angle of the pressing plate (for example, Japanese Utility Model Laid-Open No. 53-107034).

However, in this zero rubbing machine, the angle of the pressing plate with respect to the road surface is fixed to a predetermined angle set by the turnbuckle. On the other hand, the asphalt finisher body runs while continuously changing its posture due to slight undulations and irregularities on the road surface. For this reason,
The pressing plate fixed to the side surface of the asphalt finisher floats up from the road surface or, on the contrary, presses the road surface too strongly.

When the pressure plate rises with the inclination of the asphalt finisher body, more asphalt than necessary is spread evenly, resources are wasted, and a step is created at the connection between the roadway and the sidewalk. Will end up. Furthermore, if the distance between the road surface and the pressing plate is too wide, the asphalt surface will not be smoothly connected in the running direction of the asphalt finisher, and a step will occur, which will not only look bad, but will also hinder the running of the bicycle. There is a problem in traffic safety.

Also, if the pressing plate presses the road surface too strongly with the inclination of the main body of the asphalt finisher, an appropriate amount of asphalt cannot be laid, or in the worst case,
There is a problem that the pressing plate is caught on the road surface.

Therefore, the present invention can be attached to a work vehicle such as an asphalt finisher, and can easily perform zero rubbing so that the pedestrian road surface and the vehicle road surface are smoothly connected even when the road surface is uneven when finishing the pavement surface. The object is to provide a zero rubbing device that can be used.

(Means for Solving the Problems) In order to solve the above problems, the present invention has the following configuration.

That is, the present invention is fixed to the side edge of the main body of the asphalt finisher, and when laying the asphalt, the zero-rubbing of the asphalt finisher is performed so that the road surface through which the main body of the asphalt finisher passes and the road surface beside it are smoothly connected. In the zero rubbing device for performing, a support body fixed to the side end of the main body of the asphalt finisher, a pressing plate rotatably fixed at one end edge to the lower end edge of the support body, and pressing the paved road surface, A connecting member for connecting between the support and the pressing plate, and provided on the connecting member,
A length adjusting portion that adjusts the length of the connecting member to adjust the angle of the pressing plate, and a compression spring that is elastically mounted in a cylinder that forms a part of the connecting member and that elastically receives the pressing plate. It is in a zero rubbing machine characterized by comprising.

(Operation) By the length adjusting portion of the connecting member of the zero rubbing device, the angle of the pressing plate can be adjusted so as to form a tapered surface between the road and the sidewalk.

Further, if the length of the connecting member is extended by the length adjusting portion while the pressing plate is kept at a constant angle, an appropriate pressing force can be applied to the pressing plate by the compression spring mounted in the cylinder. it can.

In this way, the angle of the pressing plate and the pressing force of the compression spring urged by the pressing plate can be adjusted.

As a result, when the pressing plate has a predetermined angle, zero rubbing can be performed with a predetermined pressing force of the compression spring.

Then, when the support of the pressing plate is lifted from the road surface due to the undulations and unevenness of the road surface, the mounting angle of the pressing plate is automatically increased by the compression spring expanding following the road surface. As a result, the asphalt road surface can be finished smoothly.

Further, when the pressing plate is strongly pressed against the road surface, the mounting angle of the pressing plate is automatically reduced by the compression spring contracting following the road surface, and the asphalt road surface can be finished smoothly.

The compression spring also absorbs the impact caused by the amount of asphalt laid and the unevenness of the ground.

(Embodiment) A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

First, the configuration will be described in detail.

FIG. 1 shows a zero scraper 10.

Reference numeral 16 is a support, and an appropriate number of through holes 18 are formed therein. The through hole 18 is provided to allow a bolt to pass through when the zero scraper 10 is attached to the asphalt finisher.

32b and 32c are angles, and a connecting member 1 described later.
4 is provided so as to support 4.

A pressing plate 12 is rotatably attached to the support 16 by a hinge 36.

Reference numeral 38 denotes a connecting body which serves as a connecting portion when the pressing plate 12 is shortly added next. The connecting body 38 is fixed to the upper surface of the pressing plate 12.

32a is an angle and is used for fixing the lower end of the connecting member 12 described later.

Reference numeral 14 denotes a connecting member. A rod 28b having an external thread engraved on its outer circumference is rotatably fixed to the angle 32a by a bolt 34a. Similarly, a rod 28a having an external thread engraved on the outer circumference and the rod 28b are turnbuckles. It is screwed to both ends of 30 with their axes aligned.

Reference numeral 24 denotes a cylinder, the rod 28a and the handle rod 22 of which are inserted at both ends, the detailed structure of which will be described later.

Reference numerals 26a and 26b are projecting pieces, which are provided at predetermined positions on the outer circumference of the cylinder 24. In this embodiment, the cylinder 2
A projecting piece 26a projecting upward from 4 is rotatably attached to the angle 32b via a bolt 34b. On the other hand, the protruding piece 26b is provided with a long hole, and the bolt 34c is inserted into the through hole penetrating the long hole and the angle 32c. This allows the cylinder 24
Is rotatable about the angle 32b within the range of the size of the long hole provided in the projecting piece 26b.
It is supported by b and the angle 32c.

In addition, on the contrary to the present embodiment, a long hole is provided in the protruding piece 26a,
It may be rotatable about the angle 32c.

Next, the structure of the cylinder 24 portion of the connecting member 14 having the coil spring 46 built therein will be described with reference to FIG.

42a is a cover of the upper end surface of the cylinder 24, to which the nut 40 is fixed.

Reference numeral 20 denotes a handle, which fixes a handle rod 22 having an external thread engraved on its outer periphery, and a tip end side of the handle rod 22 is screwed into a nut 40 fixed to a cover 42a on the upper end surface, and at the center of the cover 42a. And a piston 44a is fixed to the tip thereof.

42b is a bottom cover of the cylinder 24, the rod 28a is inserted in the center, and the upper end of the rod 28a is fixed to the piston 44b.

46 is a coil spring, and both pistons 44a, 4
It is arranged between 4b. The coil spring 46 is a compression spring used in a compressed state.

Next, the operation will be described with reference to FIG.

A state in which the zero rubbing machine 10 is fixed to the mounting plate 50 arranged on the side surface of the rolling portion 52 of the asphalt finisher 48 and the pressing plate 12 is horizontally fixed is shown by a solid line.

When the turnbuckle 30 of the zero rubbing machine 10 is rotated in a predetermined direction so as to form a tapered surface between the roadway and the sidewalk, the rods 28a and 28b are arranged inside the turnbuckle 30 and the end surfaces facing each other are separated. And the entire length of the connecting member 14 extends. At that time, the protruding pieces 26a and 26b provided on the cylinder 24 are attached to the angles 32b and 32c by bolts 34b and 34c.
Since it is rotatably supported around b, the pressing plate 12
Rotates about the hinge 36 to the position indicated by the alternate long and short dash line so as to form an angle θ. As a result, the pressing plate 12 comes into contact with the road surface, and the angle θ between the pressing plate 12 and the horizontal position is maintained.

Further, the turnbuckle 30 is connected to the connecting member 1 as described above.
When the pressure plate 12 is rotated in the direction in which the entire length of the pressure plate 4 extends, the angle of the pressure plate 12 is held constant, so that the cylinder 2 is attached to the pressure plate 12.
A pressing force is applied by the coil spring 46 arranged in the unit 4.

Then, the rotation of the turnbuckle 30 is stopped when a desired pressing force is applied to the pressing plate 12 by the coil spring.

In this way, the angle of the pressing plate 12 and the pressing plate 12
It is possible to adjust the pressing force of the coil spring 46 that is urged to.

That is, the turnbuckle 30 and the rods 28a and 28b
When the total length of the piston rod made of is increased, the coil spring 46 is greatly contracted, and the pressing force of the coil spring 46 on the pressing plate 12 is increased. On the contrary, when the total length of the piston rod is short, the pressing force of the coil spring 46 on the pressing plate 12 becomes small.

Further, by turning the handle 20 to determine the position of the piston 44a, the pressing force for urging the piston 44b downward by the coil spring 46 can be adjusted.

Thereby, when the pressing plate 12 has a predetermined angle, zero rubbing can be performed with a predetermined pressing force of the coil spring 46.

When the support body of the pressing plate is lifted from the road surface due to the undulations and irregularities of the road surface, the pressing plate 12
The attachment angle θ is automatically increased as the coil spring 46 extends following the road surface, and the asphalt road surface can be finished smoothly.

Further, when the pressing plate 12 is strongly pressed against the road surface, the attachment angle θ of the pressing plate 12 is automatically reduced by the coil spring 46 contracting following the road surface, and the asphalt road surface is finished smoothly. be able to.

Further, the coil spring 46 absorbs the power of the piston 44b when the pressing body receives an impact, and also functions as a cushioning material.

Next, the attachment to the asphalt finisher 48 will be described with reference to FIG.

The support body 16 of the zero rubbing machine 10 and the mounting plate 50 provided on the side surface of the rolling portion 52 of the asphalt finisher 48 are fixed to predetermined positions via bolts 34d, 34e and 34f. The protruding piece 26a provided on the cylinder 24 is attached to the support 1
6 is attached to the angle 32b protrudingly provided on the shaft 6 through a bolt 34b. Further, the bolt 34c is inserted into the elongated hole provided in the protruding piece 26b and the through hole penetrated by the angle 32c. Accordingly, the cylinder 24 is supported by the angle 32b and the angle 32c so as to be rotatable around the angle 32b.

A state in which the pressing plate 12 is set to be horizontal is shown by a solid line.

Next, the asphalt finisher 48 will be briefly described with reference to FIG.

This is a machine that spreads the asphalt stored in the hopper 54 on the road surface to be paved and moves the rolling section 52 to compact the asphalt when moving, and the mounting plate 50 is arranged on the side surface of the rolling section 52. It is set up.

Next, the operation will be described in detail.

In FIG. 3, the turnbuckle 30 is rotated and the entire length of the connecting member 14 is extended so that the inclination angle θ of the pressing plate of the zero rubbing device 10 fixed in advance as a solid line has a predetermined taper angle. The angle θ
Set.

At this time, the turnbuckle 30 is further rotated, and the pressing force applied to the pressing plate 12 is adjusted by the coil spring 46.

The relationship between the average sidewalk, the roadway, and the tapered surface between the two is that the roadway is about 3 to 5 cm higher than the sidewalk, and the width of the tapered surface is about 30 to 50 cm.
Adjust the length of 2.

Further, the strength of the coil spring 46 arranged in the cylinder 24 can be adjusted by rotating the handle 20. In addition, in order to facilitate the adjustment, the handle rod 2
If the scale is engraved on 2, it will be easier to use.

As a result, it is possible to obtain an appropriate pressing force with which the pressing plate 12 presses the road surface.

The set state of the zero rubbing machine 10 is shown by a chain line in FIG.

When working with the asphalt finisher 48 with the zero rubbing machine 10 attached as described above, the asphalt spread from the hopper to the bottom of the asphalt finisher 48 is removed by the rolling section 52 and the lower surface of the pressing plate 12 arranged under the asphalt finisher 48 body. Compact into the desired shape.

Then, a predetermined taper surface is formed on the pavement surface and zero rubbing work is performed.

Even if there is unevenness on the road surface during the work of zero rubbing, the impact force is the coil spring 4 shown in FIG.
When the piston 44b pushes up the coil 6, the coil spring 46 can absorb it, so that no impact is given to the device.

Further, even if there is unevenness on the road surface, the coil spring 46 pushes the pressing plate 12 with a constant force, so that the pavement thickness can be kept constant.

In the above-described embodiment, the turnbuckle 30 is used as the adjusting portion for adjusting the length of the connecting member 14 in order to adjust the angle of the pressing plate 12 and the pressing force with which the coil spring 46 presses the pressing plate 12. It is also possible to use a liquid conditioner, a compressed air conditioner, or the like.

The various preferred embodiments of the present invention have been described above.
The present invention is not limited to the above-described embodiments, and it goes without saying that many modifications can be made without departing from the spirit of the invention.

(Effect of the Invention) According to the present invention, the spring provided in the cylinder forming a part of the connecting member of the zero rubbing machine fixed to the main body of the asphalt finisher causes the main body of the asphalt finisher to undulate the road surface. Even if it inclines accordingly, the pressing plate appropriately touches the road surface and zero rubbing can be performed, and zero rubbing can be performed so that the pedestrian road surface and the vehicle road surface higher than the pedestrian road surface are smoothly connected.

Therefore, since the asphalt finisher can perform the paving work and the zero rubbing work at the same time, the work efficiency is improved, and the pavement thickness is made uniform so that the asphalt is not wasted, which is technically and economically effective. .

Further, according to the present invention, the length adjusting portion of the connecting member can easily set an appropriate pressing force for pressing the pressing plate by the spring provided in the cylinder of the connecting member and the angle of the pressing plate.

[Brief description of drawings]

FIG. 1 is an external view of a zero-rubbing device according to the present invention, FIG. 2 is a cross-sectional view of a connecting member, FIG. 3 is a diagram showing how the zero-rubbing device is attached to a work vehicle such as an asphalt finisher, and FIG. FIG. 3 is an external view of an asphalt finisher. 10 ... Zero rubbing machine, 12 ... Pressing plate, 14 ... Connecting member, 16 ... Supporting body, 24 ... Cylinder, 28a,
28b ... Rod, 30 ... Turnbuckle, 46 ...
coil spring.

Claims (1)

[Scope of utility model registration request] 1. A zero-rubbing of the asphalt finisher is fixed to the side end of the main body of the asphalt finisher, and when the asphalt is spread, the road surface through which the main body of the asphalt finisher passes and the road surface beside it are smoothly connected. In the zero rubbing device to be performed, a support body fixed to a side end of the main body of the asphalt finisher, a pressing plate rotatably fixed to one end of the lower end edge of the support body, and pressing the paved road surface, A connecting member for connecting between the support and the pressing plate, a length adjusting unit provided on the connecting member for adjusting the length of the connecting member to adjust the angle of the pressing plate, and a part of the connecting member. It is mounted in the cylinder that constitutes
And a compression spring that elastically receives the pressing plate.