JPH07122332B2 - Concrete floor finishing machine - Google Patents

Description

TECHNICAL FIELD The present invention relates to a concrete floor finishing machine used for a monolithic floor construction method in a construction work.

[Prior art] The monolithic floor construction method, which finishes the concrete floor in one layer, is widely used in construction work, and in the floor leveling process in this construction method, conventionally, hand finishing with a gold trowel or mechanical finishing with a rotary trowel is performed. ing.

[Problems to be Solved by the Invention] By the way, the hand-finishing using the iron is inefficient, there is a difference in the finish depending on the skill of the worker, and there is a problem that the wage increases due to the shortage of the worker. In machine finishing with irons, engine-driven ones have many complaints about noise. In addition, the precision of finishing is poor, and the final finishing must rely on hand finishing with irons.

Since the direction is changed by moving the center of gravity of the aircraft, the rotation marks of the trowel remain on the concrete surface with the center of gravity.

It is necessary to take safety measures for operators to move and steer the machine on uncured concrete that has poor scaffolding and many obstacles such as reinforcing bars.

There was a problem such as.

SUMMARY OF THE INVENTION The present invention has been made in view of the above conventional problems, and an object thereof is to provide a concrete floor finishing machine having good workability as well as operability and good finishing accuracy. Is intended to be provided.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the first technical means taken by the present invention is that a plurality of support arms are provided on a vertical main shaft pivotally supported at the central position of the machine body. A sleeve mounted in a radial direction is loosely fitted, and a traveling device for the machine body is integrally provided at the lower end of the vertical main shaft located below the sleeve, and a plurality of rotary trowels are provided at the tip of each support frame. Each of the vertical rotating shafts is mounted so as to be equiangularly radial, and each rotary trowel that rotates by the rotational drive of each vertical rotating shaft in the same direction is revolved around the vertical main shaft as a center of rotation. As a second technical means, the traveling device is composed of a pair of parallel rollers that are driven and controlled separately.

[Operation] Therefore, in the concrete floor finishing machine of the present invention, when the vertical rotation shafts at the tips of the support arms are driven to rotate, the rotary irons of the respective arms rotate in one direction. This time,
Revolving torque around the vertical main axis of the machine is generated in each rotary trowel, and when the machine is run by the traveling device, the rotary trowel revolves while revolving, so that the concrete floor surface can be efficiently and accurately finished. it can.

[Embodiment] The configuration of the present invention will be described in detail below based on an illustrated embodiment.

1 and 2, in a concrete floor finishing machine 1 according to the present invention, a vertical main shaft 3 is supported at the center of a circular pipe frame 2 and a sleeve 4 is attached to the vertical main shaft 3.
Are rotatably loosely fitted, and three support arms 5 are attached to the sleeve 4 in a conformal radial manner.

The sleeve 4 also serves as a slip ring of a power supply circuit for a drive motor, which will be described later.

At the tip of each of the support arms 5, three rotary irons 8 which are rotationally driven by an iron driving motor 6 via a speed reducer 7 are equiangularly and radially attached to a vertical rotary shaft 9. A traveling device 10 is integrally provided at the lower end of the vertical main shaft 3 below the sleeve 4.

In the illustrated embodiment, the traveling device 10 has a pair of rollers 10a, 10a arranged in parallel, and each roller 10a has a separate traveling motor 1a.
The belts 10c are driven by 0b and 10b. It should be noted that the traveling device 10 can adopt other traveling systems such as a crawler system.

Reference numeral 11 in the drawing denotes an operation handle extended from the machine body frame 2 in one direction. This operation handle 11 can be omitted when a traveling system by remote control is adopted.

When the above concrete floor finishing machine 1 is operated, when the iron-driving motors 6 of the three supporting arms 5 are simultaneously driven, the three rotary irons 8 at the tips of the supporting arms 5 rotate in the same direction. At this time, revolving torque centering on the vertical main shaft 3 of the machine body frame 2 is generated in each rotary iron 8, and the rotary iron 8 revolves around the vertical main shaft 3 along with its rotation.

Therefore, by holding the operation handle 11 and driving the traveling motor 10b, as the finishing machine 1 travels on the concrete floor surface, the rotation operating area of the revolving iron trowel 8 revolves around the vertical main spindle 3. It will be formed and the floor surface will be leveled by the traveling movement in this wide range of revolution operation range.

When the pair of traveling motors 10b are driven at the same speed in the same direction, the concrete floor finishing machine 1 goes straight, and when the traveling motors 10b and 10b have a rotational difference, the concrete floor finishing machine 1 bends in one direction.
When both traveling motors 10b, 10b are rotationally driven in opposite directions, the vehicle can be turned.

Further, by mounting a remote control device and an automatic control device on the machine body frame 2 and the traveling device 10, automatic operation becomes possible.

Next, the principle by which the orbital motion of the rotary iron 8 causes the orbital motion will be described with reference to FIG.

In the drawing, when the three rotary irons 8 at the tips of the three support arms 5 are each rotationally driven by the vertical rotary shaft 9 in the clockwise direction as indicated by arrow A by the rotational force of F, the rotary irons 8 are Due to the frictional resistance with the concrete floor surface, a counterclockwise reaction force F ′ about the vertical rotation axis 9 as shown by arrow B is generated in each support arm 5.

This reaction force F ′ = F (rotational force of the rotary iron) × μ (coefficient of sliding friction between the rotary iron and the concrete floor), and the friction coefficient μ
Proportional to. The reaction force F ′ acting on the base end of each support arm 5 is received by the vertical main shaft 3,
On the contrary, the reaction force F'applies to the support arms 5 a rotational torque indicated by an arrow C centered on the vertical main shaft 3, and each support arm 5 integrally rotates about the vertical main shaft 3 counterclockwise, That is, the rotary iron 8 revolves around the vertical main shaft 3.

This revolving action is achieved by the rotary iron 8 attached to the support arm 5.
Irrespective of the number of
Practically, it is optimal to use three rotary irons 8 and three support arms 5 as in the embodiment.

[Effects of the Invention] In short, according to the present invention, a vertical main shaft pivotally supported at a central position of a machine body is loosely fitted with a sleeve having a plurality of support arms equiangularly arranged, and a traveling device for the machine body is provided. The lower end of the vertical main shaft is located below the sleeve, and is integrally mounted on the lower end of the vertical main shaft.
The rotary irons, which rotate by the rotational drive of the vertical rotary shafts in the same direction, are configured to revolve around the vertical main shafts as rotation centers, and the traveling devices are parallel-paired and driven separately. Since it consists of rollers, the rotation operating area of each rotary iron revolves around the radius of the support arm length with the vertical spindle as the center of rotation. It is possible to secure the revolution operating range of the trowel, and the worker can perform traveling movement operation on the floor using the above-mentioned revolution operating range as a guide. Therefore, the rotation operation is not affected by the revolution operation of the finishing machine body. Efficiently leveling the concrete floor surface while maintaining high accuracy by cleaning up the finishing traces between the areas, the rotation traces of the trowel in the rotation operating area and the traveling trajectory by the rollers of the traveling device. Can, subsequent to unnecessary hand finishing by gold iron, it is possible to achieve a reduction of the improvement and construction costs of the quality of the finished surface.

In addition, since a part of the rotating force of the rotating iron is released as an orbital torque, the traveling device can be small and lightweight, which can improve the operability and enhance the safety of work at dangerous sites with poor footing. Moreover, since the direction change of the traveling device does not depend on the movement of the center of gravity of the machine body as in the conventional case, the traveling direction can be easily changed by the pair of parallel driven rollers which are separately driven, so that the concrete floor can be easily changed. The present invention has a very useful new effect such as maintaining a uniform rotating action of the trowel on the surface and eliminating the inconvenience that the trace of rotation and the traveling locus of the roller remain on the floor surface.

[Brief description of drawings]

The drawings are drawings showing an embodiment of the present invention, wherein FIG. 1 is a partially omitted plan view, FIG. 2 is a front view, and FIG. 3 is a view for explaining the principle of revolution movement. 1 ... Concrete floor finishing machine, 2 ... Machine frame, 3
... vertical main shaft, 4 ... sleeve, 5 ... support arm, 8 ... rotary iron, 9 ... vertical rotary shaft, 10 ... traveling device, 10a ... roller.

Claims (2)

[Claims] 1. A vertical main shaft pivotally supported at a central position of an airframe,
A sleeve in which a plurality of support arms are equiangularly mounted radially is loosely fitted, and a traveling device of the machine body is integrally provided at the lower end of the vertical main shaft located below the sleeve, and the tip end portions of the respective support frames are provided. , Each of which has a plurality of rotating irons mounted in a radial direction equiangularly, and each of which rotates by rotating the vertical rotating shafts in the same direction. A concrete floor finishing machine characterized by being configured to 2. The concrete floor finishing machine according to claim 1, wherein the traveling device comprises a pair of parallel rollers which are driven and controlled separately.