JPH0369768A - Ready mixed concrete floor levelling device - Google Patents

Abstract

PURPOSE:To make it possible to automate the levelling work of a concrete floor by providing two pairs of a plurality of levelling wings radially, constituting so as to to reversely rotate each pair of wings mutually to make levelling work, and providing a raking and levelling screw in the front of the wings. CONSTITUTION:A floor levelling device is constituted of a frame 1, transmission 2, two rotary shafts, raking and leveling screw 10 and so on. Four sheets of levelling blades 4 are mounted to a rotary driving shaft 3 horizontally and radially to rotate reversely two pairs of back and front blades 4 mutually. After that, a motor 5 is operated to rotate the levelling blades 4, and the levelling blades take a slide on the surface of a ready mixed concrete C to level smooth while holding it. The direction of rotation of two pairs of levelling blades 4 is reversed to make the levelling work in a state of a standstill without moving in all directions. In addition, the difference in height of the surface level is controlled with the raking and levelling screw 10.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an apparatus for automatically leveling a poured ready-mixed concrete floor using power.

[Conventional technology 1] Conventionally, leveling of fresh concrete floors was done by professionals.
It was being done. This floor leveling work was completed by using a large metal trowel and a long metal leveling ruler, and troweling the fresh concrete several times while waiting for it to harden.

It takes a long time to complete this normal plane, and the work usually extends into the night.

[Problem to be solved by the invention] As mentioned above, floor leveling work is tough work that often extends into the middle of the night, and requires specialized work tools, making it extremely difficult to secure human resources. Automation using power was required.

The present invention was made in response to the above-mentioned conventional demands, and its purpose is to provide a highly accurate and efficient apparatus for automating concrete floor leveling work.

[Means for Solving the Problems 1 The ready-mixed concrete floor leveling device of the present invention includes a plurality of leveling plates 1t that slide while pressing on the surface of ready-mixed concrete.
Two sets of leveling blades are arranged radially, the leveling blades of each set are rotated by power in opposite directions, and a leveling screw is horizontally mounted in front of the leveling blades so as to be freely rotatable. This is characterized in that the leveling screw is provided so as to be movable up and down.

[Embodiment 1] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

In FIGS. 1 to 3, reference numeral 1 denotes a main body frame, and a drive transmission 2 is provided in the center thereof. 2 on the lower surface of the drive transmission 2.
A book rotation drive shaft 3 is provided protrudingly.

Each of these rotary drive shafts 3 has four leveling blades 4.
are installed horizontally and radially. The two sets of front and rear leveling blades 4.4 are adapted to rotate in opposite directions, as shown by arrows in FIG. 4. The leveling blades 4, 4 may be rotated in a state where they overlap to some extent, and the leveling blade 4 has a front edge 4a, that is, the side in the rotation direction, which is curved, as shown in Figure #4A. Standing up, scratching the fresh concrete)C δL
This makes it possible to level the surface smoothly without scratching.

Incidentally, the ground contact area, ground contact pressure, and rotation speed of the leveling blade 4 can be changed depending on the hardening stage of the fresh concrete (1)-C.

Reference numeral 5 denotes a prime mover, which may be any LH+ 71 source such as an electric motor or the like as shown in the figure. Reference numeral 6 denotes a board frame, which is attached to the main body frame 1 and protects the area around the leveling blade 4.

A rotating 7-frame 7 is attached to the front end of the main body 7-frame 1 so as to be vertically movable via a pivot shaft 7a. The vertical movement of the rotating frame 7 is driven by a lifting motor 9 via an operating screw 8.

A leveling screw 10 is attached to the tip of the rotating frame 7.
is freely rotatable! has been done. The leveling screw 10 spirals in opposite directions from the center to the left and right, and by changing the direction of rotation, the leveling screw 10 can level the fresh concrete.
It is now possible to separate the concrete from side to side, and to scrape together the ready-mixed concrete C on the left and right sides. The leveling screw 10 is rotationally driven by a motor 11.

A sensor 12 receives the level laser beam R emitted from the laser emitting device t13 and sends a command signal to the motors 9 and 11.

14 is a handle.

Next, floor leveling work using the apparatus of the above embodiment will be explained.

First, the driving force 8!5 is operated to rotate the leveling blade 4. When the leveling blade 4 rotates, the leveling blade 4
The bottom surface of the fresh concrete CL: r) Slide while pressing down on the surface to level it out.

Since the rotation directions of the two sets of leveling blades 4 are opposite, if each leveling blade 4 is in even pressure contact with the surface of the fresh concrete (C), the device cannot be moved forward, backward, left or right. Level the surface while standing still.

When you want to move the device, by operating the handle 14, the ground pressure of the leveling blade 4 is unbalanced, and the difference in resistance between the leveling blade 4 and the fresh concrete C allows it to be moved in the desired direction.
It is possible to make jJ+. In particular, when moving in the left-right direction, the leveling screw 10 is raised and released from the surface of the fresh concrete C.

Normally, a level laser beam R emitted from a laser emitting device 13 is received by a sensor 12, and the leveling work is performed while checking the leveling level.

If the surface level of the fresh concrete C to be leveled (17-) is higher than the standard, the sensor 12 detects this and activates the motor 9 to lower and rotate the leveling screw 10 to spread the fresh concrete C on both sides. Scrape it aside to lower its surface level.

Conversely, if the surface level of fresh concrete C is low,
The leveling screw 10 is rotated in the opposite direction to scrape together the left and right fresh concrete C to lower its surface level.

When the surface level of raw concrete 17-) C reaches a predetermined level, the leveling screw 10 stops rotating.

[Effect of the invention 1 1) A plurality of leveling blades that slide while pressing on the surface of fresh concrete are arranged radially, and the leveling blades are rotated by power, so that the floor leveling work is easy. It will be much easier and your working Union will improve.

2) Two sets of leveling blades arranged radially are provided, and each set of leveling blades is rotated in opposite directions, making it possible to stably level the floor with the blades. and can easily change the working direction.

3) Since the leveling screw is rotatably mounted horizontally in front of the leveling blade, the height of the poured fresh concrete can be easily corrected.

[Brief explanation of drawings]

Fig. 1 is a side view of the floor leveling device of the present invention, Fig. 2 is its plan view, Fig. 3 is its front view, PtIJ4 is an explanatory diagram of the action of the leveling blade, and Fig. 4A is the same as that of Fig. 4. It is a sectional view along AA, tQ. 1... Main body frame, 2... Drive transmission/nocilan, 3... Rotation drive shaft, 4... Leveling blade, 4a
...114 edge, 5... Prime mover, 6... Guard frame, 7... Rotating frame, 7a... Pivoting shaft, 8
... Operating screw, 9... Lifting motor, 10...
Leveling screw, 11...Motor, 12...Sensor, 13...Laser emitting device, 14...Handle, C
...Ready-mixed concrete, R...Level laser beam.

Claims (1)

[Claims] 1. Two sets of leveling blades that slide while pressing on the surface of fresh concrete are provided in a radial manner, and each set of leveling blades is driven to rotate by power in mutually opposite directions. A fresh concrete floor leveling device characterized in that a leveling screw is rotatably mounted horizontally in front of a leveling blade. 2. The ready-mixed concrete floor leveling device according to claim 1, wherein the leveling screw is provided so as to be movable up and down.