JPH022728Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention is a concrete floor finishing machine that finishes the concrete floor surface after concrete is poured, or a concrete floor finishing machine that finishes the ground surface of Antucar tennis courts and stadiums. The present invention relates to a traveling device for various surface finishing machines such as a finishing machine, and more particularly, to a traveling device for a surface finishing machine that has a flexible belt stretched between a pair of front and rear pulleys.

[Conventional technology]

Conventionally, in this type of surface finishing machine, in order to avoid roughening the surface as much as possible during running,
Generally, the ground side surface of the flexible belt constituting the traveling device is a smooth surface.

However, taking concrete floor finishing as an example, at the time of final finishing when the concrete has hardened to a certain extent, the adhesive force between the belt and the concrete increases as the concrete hardens, and the belt is more than 10 mm in diameter and deep. A phenomenon occurs in which concrete lumps with a diameter of about 5 mm peel off and roughen the concrete floor surface. Naturally, this phenomenon also occurs when finishing the ground surface of tennis courts, stadiums, etc. in Anzucar.

[Problem that the invention attempts to solve]

This invention was completed as a result of various experiments focusing on this phenomenon, and its purpose is to
To provide a traveling device capable of traveling on a finished surface with little peeling by preventing the adhesion of a belt as much as possible even if the adhesive strength of concrete to be finished increases to some extent.

[Means for solving problems]

In order to achieve this object, the traveling device of the surface finishing machine according to the present invention is characterized in that a large number of bottomed holes are provided on the grounding side surface of the flexible belt.

[Effect]

In this way, since the bottomed hole is provided on the grounding side surface of the belt, when the belt is in contact with the ground, air is trapped in the bottomed hole, and it is as if there is an air layer between the belt and the grounding surface. The adhesive force between the belt and the ground surface decreases.

[Effect of idea]

Therefore, when traveling, the belt of the traveling device is less likely to peel off concrete, etc.
The surface can be finished beautifully.

〔Example〕

An embodiment of the present invention will be described based on the drawings. As shown in FIGS. 5 and 6, a pair of left and right traveling devices 4a, 4b is provided. As shown in detail in FIGS. 2 and 4, these traveling devices 4a and 4b include a pair of front and rear pulleys 6 and 7 that are pivotally supported on a frame 5, and both pulleys 6 and 7.
It consists of a rubber belt 8 stretched between the
It is constructed so that it can be driven in forward and reverse directions by the motor 10 via a gear 9 fixed to the rear pulley 7, a gear 11 fixed to the motor 10, and a chain 12 suspended between both gears 9 and 11. Cylindrical members 13a and 13b are erected on the frames 5 of both traveling devices 4a and 4b, respectively, and these two cylindrical members 1
The upper parts of 3a and 13b and the frame 1 are interlocked and connected via clutches 14a and 14b, respectively, and gear cases 16 that fixedly hold motors 15a and 15b are provided on both cylindrical members 13a and 13b.
a and 16b are fixed.

Inside both gear cases 16a and 16b are pulleys 17 fixed to motors 15a and 15b, respectively.
and a pulley 18 fitted externally to the cylinder members 13a and 13b so as to be relatively rotatable, as well as both pulleys 17,
The belt 19 etc. hung between 18 are stored,
In addition, a plurality of pins 20a, 20b that protrude downward are fixed to the pulleys 18, which are fitted onto both the cylindrical members 13a, 13b, respectively. These pins 20a and 20b are cylindrical members 13a and 20b, respectively.
The flanges 22a of the rotary cylinders 21a and 21b are fitted onto the rotary cylinders 21a and 13b so as to be relatively rotatable and slidable relative to each other.
Brackets 24a, 24b are inserted into the through holes formed in the rotary cylinders 22b, and are fixed below the rotary cylinders 21a, 21b, having shafts 23a, 23b projecting downward at their tips. Self-aligning bearings 25a, 25b are connected to the lower ends of the rotating cylinders 21a, 21b, and smooth the surface of the semi-solidified concrete floor A through these bearings 25a, 25b. A total of four iron bodies 26a, 26b, and these iron bodies 26
Finishing devices 28a and 28b are respectively attached to holding members 27a and 27b that hold the cylindrical members 13a and 26b, and are configured to be rotatable around the respective cylindrical members 13a and 13b.
23b is configured to abut on either one of the holding members 27a, 27b.

Bevel gears 29 are fixed to the intermediate portions of the rotating cylinders 21a and 21b, respectively, and other bevel gears 30 that mesh with the left and right bevel gears 29 are fixed to rotating shafts 31 inserted into the cylinder 2 so that they are mutually connected. The finishing devices 28a and 28b are connected in an interlocking manner so that the rotations of the finishing devices 28a and 28b are synchronized with each other, as will be described later. A linear motor 32 is placed and fixed on the frame 1,
A screw shaft 33 rotationally driven by this motor 32
is screwed into a screw hole (not shown) drilled in the frame 1, and a plate 34 is fixed to the lower end of the screw shaft 33. On the other hand, a shaft 36 having a plate 35 is pivotally attached to the cylinder 2, and a load sensor 38 is attached to a cylinder member 37 that is fitted onto the shaft 36 so as to be relatively slidable. The load sensor 38 is configured to be elastically pressed against the plate body 34 on the side of the screw shaft 33 by a compression spring 39 interposed between the load sensor 35 and the cylindrical member 37 .

In the concrete floor finishing machine having such a configuration, as shown in detail in FIG. 1 and FIG. , a large number of bottomed holes 40 are provided. These bottomed holes 40 have a circular cross-sectional shape, the corners on the surface side thereof are chamfered, and the diameter gradually becomes smaller toward the bottom side. Regarding the shape of the bottomed hole 40, it is not necessary to make the cross-sectional shape circular, and it is not necessary to gradually reduce the cross-sectional area toward the bottom. Particularly favorable results were obtained when the diameter was made gradually smaller toward the sides. Also,
The total weight is approximately 120Kg, the diameter D of the pulleys 6 and 7 of the traveling devices 4a and 4b is 100mm, the length L of both pulleys 6 and 7 is 300mm, the width W of the belt 8 is 200mm, and the belt 8
When various experiments were conducted using a concrete finishing machine with a thickness T of 3 mm, it was found that the diameter d of the bottomed hole 40
is 1/6 to 1/12 of the diameter D of the pulleys 6 and 7, specifically about 15 mm, the distance l between the bottomed holes 40 is about 30 mm, the depth t of the bottomed holes 40 is about T/2, Specifically, 1~
The least peeling of concrete was achieved when the thickness was about 2 mm.

Next, to explain the operation of the concrete floor finishing machine, during finishing work, the clutches 14a, 1
4b is locked, the two cylindrical members 13a, 13b and the frame 1 are combined into one, and the left and right belts 8 rotate with the rotation of the motor 10, and the traveling vehicle 3
moves forward and backward. In this case, since a large number of bottomed holes 40 are provided on the grounding side surface of each belt 8, air is trapped in each bottomed hole 40 when the belt 8 is grounded, and the gap between each belt 8 and the concrete floor A is Since an air layer is interposed between the belt 8 and the surface of the concrete floor A, the adhesion between the belt 8 and the surface of the concrete floor A is reduced, and concrete peeling by the belt 8 is reliably prevented.
At the same time, the other motors 15a, 15b also rotate in opposite directions, and as the pulley 17, belt 19, and pulley 18 rotate, the left and right pins 20a, 2
0b rotates, and the rotating cylinders 21a and 21b rotate in opposite directions. Then, the bracket 24a,
The shafts 23a, 23b rotate via the shafts 24b, come into contact with either one of the holding members 27a, 27b, and move the finishing devices 28a, 28b to the traveling devices 4a, 24b.
4b in mutually opposite directions, and the surface of the concrete floor A is finished smooth by each of the trowels 26a and 26b. In other words, as shown in FIG. 5, while the vehicle 3 is moving in the direction of arrow F,
Each finishing device 28a, 28b will rotate in the opposite direction in the directions of arrows a and b.

In this way, since the finishing devices 28a and 28b are rotationally driven around the respective traveling devices 4a and 4b, the rotation radius of the finishing devices 28a and 28b is small, and even near the corners of the concrete floor A can be finished well. and both finishing devices 28a, 28b
Since the two finishing devices 28 rotate in opposite directions,
The reaction forces acting on a and 28b are canceled out, and meandering of the traveling vehicle 3 is prevented. However, both finishing devices 28
a and 28b do not necessarily need to be rotated in the opposite direction,
For example, the finishing devices 28a, 28b are rotated in the same direction by configuring the finishing devices 28a, 28b to cancel out the reaction forces acting on the finishing devices 28a, 28b by changing the speeds of the left and right traveling devices 4a, 4b. You can also.

In addition, during finishing work, the load sensor 3
8 constantly detects the reaction force acting on the finishing devices 28a, 28b, and based on the detection results, the linear motor 32 is rotated in forward and reverse directions to control the pressing force of the finishing devices 28a, 28b against the concrete floor A. Therefore, it is possible to finish evenly over the entire surface of the concrete floor A. Further, since the two rotary cylindrical bodies 21a, 21b are interlocked and connected by the bevel gears 29, 30 and the rotary shaft 31, as shown in FIG.
By shifting the phase of the iron rods b, even if a large load is applied to one of the iron rods 26a, the phases of the left and right iron rods 26a and 26b will be shifted and collision will not occur.

Then, when changing the direction of the traveling vehicle 3,
By rotating the linear motor 32, both traveling devices 4a,
4b, and in that state, both clutches 14a, 1
4b and rotate both motors 15a and 15b. Then, both motors 15a and 15b move to the cylindrical member 1.
3a, 13b, these cylindrical members 13a, 13
revolving around the axis of b, and along with that both running parts 4
The directions of a and 4b are changed. In this way, since the direction is changed by lifting both traveling devices 4a, 4b, when changing the direction, both traveling devices 4a, 4
The surface of concrete floor A will not be roughened by b.

Although the explanation has been given above using a concrete floor finishing machine as an example, the traveling device according to the present invention can also be used in surface finishing machines for tennis courts, stadiums, etc., and similar effects can be expected.

[Brief explanation of the drawing]

The drawings show an embodiment of the traveling device of the surface finishing machine according to the present invention, FIG. 1 is a partially cutaway plan view of a belt constituting the traveling device, FIG. 2 is a side view of the traveling device, and FIG. 3 is a side view of the traveling device. 1, FIG. 4 is a cross-sectional plan view of the traveling device, FIG. 5 is a plan view of the entire surface finishing machine, and FIG. 6 is a partially cutaway front view of the surface finishing machine. 4a, 4b... traveling device, 6, 7... pulley,
8...Belt, 40...Bottomed hole, D...Pulley diameter, d...Bottomed hole diameter.

Claims (1)

[Scope of Claim for Utility Model Registration] In a traveling device for a surface finishing machine in which a flexible belt 8 is stretched between a pair of front and rear pulleys 6 and 7, a hole with a bottom is formed on the surface of the grounding side of the belt 8. 4
A traveling device for a surface finishing machine that is equipped with a large number of zeros. The bottomed hole 40 has a circular cross-sectional shape, and
The traveling device for a surface finishing machine according to claim 1, wherein the corner portion on the surface side of the bottomed hole 40 is chamfered. The traveling device for a surface finishing machine according to claim 1, wherein the diameter d of the bottomed hole 40 is 1/6 to 1/12 of the diameter D of the pulleys 6 and 7.