JPS6147924B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a paving material suitable for smoothly spreading a self-hardening paving material made of resin mortar, rubber chips bonded with an organic binder, etc. onto a surface to be paved. This invention relates to a material leveling device.

The applicant has already filed several applications for this type of paving material leveling device. for example,
The apparatus according to Japanese Patent Application No. 56-179185 includes a frame body that moves on the surface to be paved, a hopper mounted on the frame body, and a screed means provided behind the hopper,
As the frame body moves, a paving material such as resin mortar is supplied from a hopper onto the surface to be paved, and the paving material is spread smoothly while being pressurized by a screed means. Although the above-mentioned paving material has a relatively high viscosity and is difficult to handle, this device can spread such paving material efficiently and smoothly without requiring much skill.

This invention is a further improvement of the above-mentioned device, and its purpose is to provide a height-adjustable squeegee plate for the rear plate of the hopper, and to provide a space between the hopper and the screed that is faster than the moving speed of this device. A rotating shear type roller is also provided whose height can be adjusted, and a bank amount detection means for detecting paving material deposited on the front side of the roller in the traveling direction is installed so that the height can be adjusted together with the roller, The bank detection means adjusts the height of the squeegee plate to optimally control the bank amount of the paving material on the front side in the direction of movement of the roller, thereby spreading the paving material as a denser smooth surface with a predetermined thickness. An object of the present invention is to provide a device for leveling paving material that can be spread.

Hereinafter, the present invention will be described in detail with reference to embodiments shown in the accompanying drawings.

As shown in FIG. 1, this paving material leveling device includes a frame body 1 having a planar rectangular shape and having the appearance of a shallow box without a bottom. In this embodiment, the frame body 1 is towed in the direction of the arrow A in the figure by a towing device such as a winch (not shown), and a frame body 1 is held at a constant height on both sides of its lower surface. A pair of sled members 2 are provided for sliding on the surface to be paved. (In addition, only one sled member is shown in the figure.) The frame body 1 includes a hopper 3 for storing paving materials such as resin mortar, and a paving material supplied from the hopper 3. A screed 4 is provided for leveling the screed on the surface to be paved while applying pressure.

The hopper 3 includes a front plate 5 arranged in a funnel-shaped incline, a pair of left and right side plates 6 which are also used by the frame body 1, and a rear plate 7 provided opposite to the front plate 5. However, in this invention, the rear plate 7
is connected to a servo motor 9 via a screw shaft 8, and is configured as a squeegee plate whose height position is adjusted by the servo motor 9.

Further, in the present invention, a squeegee means consisting of a shearing roller is provided between the rear plate 7 and the screed 4 described above. This squeegee means, as shown in detail in FIG. It consists of a roller 13 with a smooth surface that is pivotally supported at the lower end of the roller. In this case, although only one is shown in the figure for convenience, a pair of left and right bearing members 15 having bearing holes 14 are connected to the lower ends of both sides of the holding plate 12 so as to project downward. , the rollers 13 are mounted via their bearing members 15 so as to be substantially orthogonal to the moving direction of the frame body 1. Note that the side plate portion of the frame body 1 is provided with guide ribs 1 for guiding the sides of the holding plate 12 in the vertical direction.
6 and 16 are provided. Furthermore, an electric motor 18 that rotationally drives the roller 13 via a chain 17 is installed on the frame main body 1 side. In that case, the roller 13 is moved by the electric motor 18 in the same direction as the moving direction of the frame body 1 indicated by the arrow A.
That is, it is rotated clockwise in FIG. 1, and the rotational speed is set to be faster than the moving speed of the frame body 1. In addition, reference numeral 19
is a gear integrally attached to the shaft end of the roller 13 so as to cooperate with the chain 17.

The screed 4 is suspended in a height-adjustable manner on the frame body 1 via, for example, an adjustment screw mechanism 21 with a handle 20. It is configured to spread the paving material under pressure through synergistic action. Note that the screed 4 may be provided with a means for heating itself. According to this, when resin mortar with high viscosity is used as the paving material, its viscosity can be lowered and a smoother finished surface can be obtained. can.

Next, the operation of this invention will be explained. First, in relation to the thickness of the pavement layer to be finally finished, the rear plate 7 of the hopper 3 and the roller 1
Adjust the height of step 3. In this case, if the thickness of the final finishing layer by the screed 4 is t ₁ , the leveling thickness by the roller 13 is t ₂ , and the layer thickness of the paving material supplied from the hopper 3 onto the paved surface is t ₃ , then Each height of plate 7 and roller 13 is t ₃ > t ₂
> t ₁ . Further, the rotation speed of the electric motor 18 is set so that the roller 13 rotates at a higher speed than the moving speed of the frame body 1. Here, in this invention, in order to prevent the paving material from being excessively deposited on the front side of the roller 13 in the traveling direction, that is, between the roller 13 and the rear plate 7 of the hopper 3, in the moving process of this device, A bank amount detection means 25 for detecting the bank (accumulation) amount of paving material is provided in the section. As shown in FIG. 2, this bank amount detection means 25 includes a flap plate 26 that is pushed upward by excess paving material accumulated on the front side in the direction of movement of the roller 13;
and a limit switch 27 that closes the contact when the holding plate 12 is pushed up to a predetermined height. For example, the bracket 28 is rotatably connected to the bracket 28 via a hinge 29, and a limit switch 27 is attached to a predetermined portion of the bracket 28. The servo motor 9 is controlled by this limit switch 27. That is, when the amount of banking of the paving material increases and the flap plate 26 is pushed up by more than a predetermined angle and the contact point of the limit switch 27 is closed, the servo motor 9 moves the rear plate 7 configured as a squeegee plate via the screw shaft 8. Slide the hopper downward to reduce the amount of paving material discharged from the hopper. On the other hand, when the bank amount decreases and the contact point of the limit switch 27 opens, the servo motor 9 slides the rear plate 7 upward and operates to increase the amount of paving material discharged from the hopper 3. Accordingly, the amount of bank corresponding to the height position of the roller 13 is optimally controlled. In this way,
After adjusting the heights of the rear plate 7 and rollers 13,
When the frame body 1 is moved in the direction of arrow A by a winch or the like (not shown), the paving material in the hopper 3 is sequentially supplied onto the paved surface with a thickness _t3 regulated by the rear plate 7, and then the roller 13
It is spread to a thickness t ₂ by . In this case, since the roller 13 is rotating at a higher speed than the moving speed of the frame body 1 as described above, the paving material has a thickness
When being spread from t ₃ to thickness t ₂ , roller 1
3 receives a force in the shearing direction, and the roller 13
It is forcibly rolled up into a more dense and smooth spread. Thereafter, this paving material is compacted and leveled to a predetermined thickness _t1 by the mutual action of the screed's own weight and the vibration of the vibrator 22. In the above embodiment, the frame body 1 is provided with the sled member 2, but it goes without saying that the sled member 2 may be moved by wheels.

As is clear from the description of the embodiments described above, according to the present invention, the bank amount detecting means 25 moves the rear plate 7 of the hopper 3 up and down to determine the amount of bank of the paving material on the near side in the traveling direction of the roller 13. The paving material is rolled up and spread by the shearing roller 13 while being optimally controlled to match the height position of the roller 13, so that the rubber chips and resin mortar bonded with an organic binder are It is possible to spread paving materials with relatively high viscosity such as paving materials densely and smoothly, and is particularly suitable for constructing elastic floor surfaces in sports facilities such as tennis courts.

[Brief explanation of the drawing]

FIG. 1 is a schematic sectional view of a paving material leveling device according to the present invention, and FIG. 2 is an enlarged exploded perspective view showing the main parts thereof. In the figure, 1 is a frame body, 3 is a hopper, 4 is a screed, 12 is a holding plate, and 13 is a roller.

Claims (1)

[Scope of Claims] 1. A frame body that moves on a surface to be paved, a hopper mounted on the frame body, and a screed means provided at the rear of the hopper, which moves as the frame body moves. A device that supplies a self-hardening paving material such as resin mortar from the hopper onto the surface to be paved, and spreads the paving material smoothly while applying pressure using the screed means, the device comprising: a rear plate of the hopper; is a slidable squeegee plate that is driven in the vertical direction by a height adjusting means including a servo motor, and a squeegee plate is provided between the hopper and the screed about a rotation axis that is substantially orthogonal to the direction of movement of the frame body. A roller that rotates at a higher speed than the moving speed of the roller is provided so that its height can be adjusted with respect to the paved surface, and a bank amount detection means is provided for detecting the paving material deposited on the front side of the roller in the traveling direction. The squeegee plate is attached to the holding member side of the roller so that its height can be adjusted along with it, and the height of the squeegee plate is adjusted via the servo motor in response to a signal from the bank amount detection means, so that the progress of the roller can be adjusted. A paving material leveling device characterized by controlling the amount of paving material deposited on the near side in the direction.