JPH0512440Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention relates to a concrete floor finishing machine equipped with an engine-driven rotary trowel to level and finish the surface of poured concrete. The present invention relates to a concrete floor finishing machine having a running roller with improved running performance.

[Prior Art] Conventionally, finishing work on a concrete floor surface has been performed by pouring concrete, then applying mortar, and leveling the concrete. However, mortar coating has the drawbacks of peeling and cracking, and requires a high degree of skill on the part of the officer, so so-called "monolithic" finishing, in which concrete is directly finished before it hardens, has come to be used. As a result, on the construction side, the trowel work of the inspectors was mechanized, resulting in labor savings and improved working postures for the inspectors. Furthermore, with the rapid progress of mechanization, the introduction of concrete floor finishing machines that use rotary trowels has added automation to the operation, achieving labor savings in finishing concrete that has not yet hardened. , labor management and automatic operation have been implemented, but satisfactory developments have not yet been made regarding the running performance of concrete floor finishing machines. In particular, when focusing on the running roller, the running roller supports about half of the weight of the concrete floor finishing machine along with the working surface of the rotary trowel, so it is possible to increase its ground contact width. It is being said.

[Problems that the invention aims to solve] Various functions have been added to the development of concrete floor finishing machines, and automatic control of the running direction has also been implemented. However, when a concrete floor finishing machine runs or changes direction, the inner and outer wheels of the running roller rotate at the same speed even though the inner and outer wheels have different rotation radii.
In particular, the inner part of the wide wheel is forced to rotate against the turning radius, which causes the wheel to scrape the floor and twist the concrete finish, resulting in delamination of the finish layer. was occurring.

[Means for Solving the Problems] The present invention was developed as a result of intensive research in view of the current state of self-propelled concrete floor finishing machines, with the aim of solving the above problems. The gist of the present invention is to eliminate the above-mentioned obstacles by constructing a vehicle with running rollers having a large ground contact width into two parts, an inner part and an outer part, and causing the inner part to idle when changing direction. The structure of this running roller is characterized by dividing the wheel width into two parts, the inner and outer parts, transmitting driving power to the outer part, and allowing the inner part to idle on the same axis as the axle of the outer part. There is.

[Example] The running roller of the concrete floor finishing machine of the present invention will be described in detail based on the drawings of a preferred embodiment. Figure 1 is a detailed sectional view of the running roller of the concrete floor finishing machine of the present invention, and Figure 2 is a detailed cross-sectional view of the running roller of the concrete floor finishing machine of the present invention.
FIG. 3 is a plan view showing the entire concrete floor finishing machine to which the present invention is applied, and FIG. 4 is a side view thereof.

First, the entire concrete floor finishing machine will be explained with reference to Figs. The rotary trowel 20 is rotatably supported and runs on the concrete floor F, and the unhardened concrete is leveled and finished by the rotation and revolution of the rotary trowel 20. The machine frame 10 is constructed by assembling four radial frame members 12 that meet at a central support portion 11 into a cage shape using a circular outer frame member 13.
The outer frame material 13 is supported near the floor surface. A central shaft 14 is fixed downward to the central support part 11, and three rotary irons 2 are connected to the outside through a sleeve 15.
0, and a frame 16 is fixed to the lower end of the frame 16 in FIG. There is.

The rotary trowel 20 includes a reduction gear 21 that is transmitted by a drive shaft 42 driven from a drive engine 20 via a gearbox 41, and three horizontal trowel blades 22.
It is supported at the tip of an arm 23 having its base end in the sleeve 15. The entire concrete floor finishing machine PT is stably supported on the concrete floor surface F by the traveling rollers 30 and the trowel blades 22 of the rotary trowel 20, and travels and moves while rotating the rotary trowel 20. Level and finish the concrete. In the figure, 40 is a drive engine, and 50 is a generator. Regarding this type of concrete floor finishing machine PT, the present applicant previously proposed an "engine-driven concrete floor finishing machine".
You can refer to the patent application filed under the name (Japanese Patent Application No. 62-93872). However, it goes without saying that the concrete floor finishing machine targeted by the present invention is not limited to the above-mentioned machine.

In the present invention, in the running roller 30 of the above or equivalent concrete floor finishing machine,
The running performance of the running wheels 31 is improved. Below, the running roller 30 of the concrete floor finishing machine of the present invention will be explained in detail with reference to FIGS. 1 and 2.

A pair of running wheels 31 are provided on the left and right sides of the central axis 14, and are driven by a drive motor 32 that is supplied with power from a generator 50. Each running wheel 31 is divided into two parts, an outer roller 33 and an inner roller 34, with the outer roller 33 having a larger width. First, as in the prior art, the outer roller 33 consists of a flange portion 37 rotatably supported by a wheel 35 supported by the frame 16 through a reduction mechanism 36, and a roller tire 38 on the outer periphery of the flange portion 37. On the inside of the flange portion 37, there is a stepped bracket 39 that is integrally curved toward the support bracket 17 fixed to the outer periphery of the frame body 16, and the inner edge thereof faces the support bracket 17.
It is circumscribed by a plurality of cam followers 18 provided at 7 and is rotatably supported. Outer roller 33
is driven from inside by a drive motor 32.

On the other hand, the inner roller 34 is configured as an idle roller 60, and includes an annular wheel body 61,
It consists of a roller tire 62 on its outer periphery.
The wheel body 61 includes a plurality of fixed rollers 63 pivoted outwardly near the outer end of the support bracket 17.
A driven roller 64 is supported on the outer surface of the wheel body 61 in correspondence with the fixed roller 63 and is pivoted outward toward the stepped wall of the stepped bracket 39.
Due to this, it is sandwiched between the support bracket 17 and the stepped bracket 39, and the wheel body 61
A plurality of cam followers 65 provided on both sides of the inner periphery of the stepped bracket 39 can be freely rotated around the axle 35 on the outer periphery of the stepped bracket 39 by making them correspond to the cam followers 18 described above. With such a configuration, the outer roller 33 driven by power and the inner roller 34, which is not transmitted with any power and is configured as an idle roller 60, can independently rotate around the axle 35, That is, whatever the rotation of the outer roller 33, the inner roller 34 is capable of its own relative rotation, either in the same direction or in the opposite direction.

[Function] The function of the running roller of the concrete floor finishing machine of the present invention will be explained based on its use and operating method. When the concrete floor finishing machine PT is started and starts running, the concrete surface is leveled and finished by the rotary trowel 20.
Operation in the running direction such as a right angle direction or a turning direction is performed on the concrete floor surface F, and a difference in rotation radius occurs at any time in each running wheel 31 of the running roller 30 of the concrete floor finishing machine PT. For example, when turning clockwise, the difference in the rotation radius between the right side running wheel 31 and the left side running wheel 31 is smaller on the right side, and the rotation speed of each drive motor 32 is controlled. The difference between the inner and outer rotation radii is eliminated by idle rotation of the outer roller 33 and the inner roller 34 according to their rotational speeds. In this way, each traveling wheel 31 can operate the concrete floor finishing machine without changing the rotational speed of the drive motor 32.
Since the rotation of the PT is performed smoothly from beginning to end, and the leveling of the concrete floor surface by the rotary trowel 20 is also uniformly finished, the weight of the concrete floor finishing machine PT will cause the concrete surface to be smoothed. Not only will there be no unevenness in the finish, but there will be no risk of twisting or peeling of a portion of the running wheel 31 on the leveled surface.

[Effects of the invention] Although the running roller of the concrete floor finishing machine of this invention has a large ground contact width for each wheel, the width is divided into two parts, an inner roller and an outer roller, and the inner roller is configured coaxially with the outer roller. However, the drive force is transmitted only to the outer rollers, and no drive force is transmitted to the inner rollers, so that the rollers rotate idly while maintaining the load supporting area, so they can easily be used on concrete floors. In addition to ensuring the freedom of rotation of the finishing machine, it also absorbs the difference in the rotation radius of each traveling wheel that occurs when changing direction, and improves the finish surface of the concrete floor due to the forced rotation of the wheels due to the change of direction. All obstacles can be removed. Thus, according to the present invention, it is a noteworthy effect that the workability of the concrete floor finishing machine is significantly improved, and the present invention greatly contributes to the construction industry.

[Brief explanation of the drawing]

The drawings show an embodiment of the running roller of the concrete floor finishing machine of the present invention, FIG. 1 is a detailed sectional view of the running roller of the concrete floor finishing machine of the present invention, and FIG. 3 is a sectional view taken along line A, FIG. 3 is a plan view showing the entire concrete floor finishing machine to which the present invention is applied, and FIG. 4 is a side view thereof. 10... Machine frame, 14... Center shaft, 16... Frame body, 17... Support bracket, 18... Cam follower, 20... Rotating iron, 30... Traveling roller,
31... Traveling wheel, 32... Drive motor, 33
...Outer roller, 34...Inner roller, 35...
Axle, 36... Reduction mechanism, 37... Flange section,
38... Roller tire, 39... Stepped bracket, 40... Drive engine, 50... Generator, 6
0...Idle roller, 61...Wheel body, 62
... Roller tire, 63 ... Fixed roller, 64 ...
...Followed roller, 65...Cam follower, PT...
Concrete floor finishing machine, F...Concrete floor surface.

Claims (1)

[Claims for Utility Model Registration] (1) In a traveling type concrete floor finishing machine, the running roller of this concrete floor finishing machine is divided into two parts, the inner and outer parts of the wheel width, and the driving power is applied to the outer part. A concrete floor finishing machine characterized in that the inner part is configured as an idling roller on the same axis as the axle of the outer part. (2) The inner roller of the running roller is rotatably supported via a cam follower on the outer periphery of a stepped bracket curved at the center of the outer roller, thereby forming an idling roller. A concrete floor finishing machine according to claim 1 of the utility model registration claim.