JPH0252746B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a concrete floor finish for smoothing the surface of a semi-solidified concrete floor after concrete has been compacted after pouring and moisture seeped out from the top surface has been removed. More specifically, a traveling vehicle body is equipped with a traveling device for traveling on a semi-solidified concrete floor surface, a finishing device for smoothing the concrete floor surface, and a finishing device that presses the surface of the concrete floor to make contact with the traveling traces of the traveling device. It relates to a device equipped with a sled-like body that erases the traces of the finishing device.

This type of concrete floor finishing machine is equipped with a dedicated running device, so for example,
As seen in Japanese Patent No. 44227, straight-line stability is superior to that of a vehicle that supports the vehicle body only by grounding the finishing device. Moreover, since the concrete floor surface is finished by smoothing by the finishing device and pressing grounding of the sled-shaped body, in other words, in cooperation with the ground leveling, only the finishing device can It can be finished with higher accuracy compared to those that are finished by twisting.

Conventionally, such concrete floor finishing machines have a running vehicle body equipped with rollers as a running device.
It is known that a finishing device is installed behind the roller, and a sled-like body is attached to the rear of the finishing device (for example, Japanese Utility Model Publication No. 36433/1983).

However, when using the conventional concrete floor finishing machine, the side where the sled body is located is specified at the rear in the traveling direction in order to erase the travel traces of the traveling vehicle body and the action traces of the finishing device. Because there is a front and back, there were the following drawbacks.

This is necessary when a work style is adopted in which the entire concrete floor is finished by repeatedly running in a zigzag pattern and finishing the floor area adjacent to the floor area finished in the previous run by running in the opposite direction. When doing this, it is necessary to make a major direction change, such as switching the front and rear of the vehicle, and the workability of turning around is poor. Furthermore, when the vehicle travels in the opposite direction to finish the previously finished floor portion, the large-scale direction change described above is required, resulting in poor work efficiency.

Moreover, since the traveling device is equipped with rollers that make line contact with the surface of the concrete floor, the ground pressure is high and the amount of roller depression is large.
Another drawback was that the surface of the concrete floor was roughened by the roller, which tended to reduce the finishing accuracy of the concrete floor surface.

The object of the invention is to eliminate the above-mentioned drawbacks.

A characteristic configuration of the concrete floor finishing machine according to the present invention is that crawler-type traveling devices each having a crawler belt with a smooth outer surface are disposed at the front and rear sides of the finishing device, and these crawler-type traveling devices The above-mentioned sled-like bodies are disposed at respective outward locations in the front-rear direction, and each of the sled-like bodies is configured to be freely switchable between a pressed ground state and an elevated ground release state. The effects are as follows.

Since a crawler type traveling device is provided as the traveling device, the vehicle can travel in either direction, forward or backward.

Since crawler-type traveling devices with a large ground contact area are installed as traveling devices at the front and rear sides of the finishing device, the ground contact area of the entire traveling device can be greatly increased, and the ground pressure of each crawler-type traveling device can be reduced. The sinking of these crawler-type traveling devices can be greatly reduced.

Since the crawler type traveling device is equipped with a crawler belt with a smooth outer surface, the crawler type traveling device does not touch the concrete floor surface by roughening it, but rather presses against the concrete floor surface. It can be formed into a flat shape.

Since the sled-like bodies are provided at the outer portions of each crawler type traveling device in the front and rear directions, it is possible to erase traces of travel of the vehicle body and traces of the finishing device during travel in either direction.

Since the sled-like body is configured to be switchable between a pressing grounding state and a grounding release state, only the sled-like body located at the rear in the direction of travel is pressed and grounded, while the sled-like body located at the front in the traveling direction is pressed and grounded. By avoiding unnecessary grounding, it is possible to prevent an increase in running resistance due to the sled-like body coming into contact with the ground and to prevent unreasonable force from acting on the sled-like body from the concrete floor. Therefore, according to the present invention, the roughening of the concrete floor surface due to sinking of the crawler type traveling device can be reduced, and the concrete floor surface can be flattened by the crawler type traveling device.
Since the crawler type traveling device can also smooth the concrete floor surface, the smoothing performance can be improved. In addition, regardless of whether the concrete floor is traveling in the forward or backward direction, smoothing by the finishing device and crawler-type traveling device and smoothing by the sled-like body allow for good finishing work. The turning back of the run when adopting a work style that finishes the entire work, or the turning back when the floor part that has been finished by running again in the opposite direction, can be done by switching the crawler-type traveling device forward and backward, and by switching the crawler-type traveling device forward and backward. The work can be carried out with good efficiency simply by changing the state of the body. Moreover, even though there is a sled-like body in the front and rear,
It is possible to prevent an increase in running resistance to allow smooth running, and to prevent unreasonable force from acting on the sled-like body, thereby preventing deformation and damage of the sled-like body.

Hereinafter, embodiments of the present invention will be described in detail based on illustrative drawings.

The driving vehicle body 3 is equipped with crawler type traveling devices 2, 2 for traveling on the semi-solidified concrete floor surface at the front and rear of the machine frame 1, respectively, and is placed between the front and rear traveling devices 2, 2 to make the semi-solidified concrete floor surface. A finishing device 4 for smoothing the surface of a concrete floor is attached to constitute a concrete floor finishing machine.

The crawler type traveling devices 2, 2 are each constructed by winding a rubber crawler belt 6 having a wide width and a smooth outer surface around a pair of front and rear crawlers 5, 5, respectively. A traveling electric motor 8 that can freely rotate in forward and reverse directions via a belt-type transmission mechanism 7 on one side.
are linked together. In other words, the crawler type traveling device 2 can be switched forward and backward.

The crawler type traveling device 2, the belt type transmission mechanism 7, and the motor 8 are integrally attached to a support frame 9, and a column 10 protrudes from the support frame 9 and is located approximately at the center in the left-right direction of the vehicle body.
is rotatably attached to a bracket 1a connected to the machine frame 1, a sector gear 11 is connected to the column 10, and a small diameter gear 12a connected to a steering electric motor 12 engages with the sector gear 11. The vehicle is configured to move forward and backward in a desired direction by driving a pair of front and rear running motors 8, 8 and a pair of steering motors 12, 12, respectively.

A support arm 13 located on the outer side of each of the crawler type traveling devices 2, 2 in the longitudinal direction and connected to the machine frame 1 is capable of vertically swinging around an axis facing the left and right of the vehicle body. A sled-like body 14 is pivotally connected to the sled-like body 14, and a compression coil spring 15 is attached to the back of the sled-like body 14 and extends across the machine frame 1.
It is configured so that as the sled-like body 14 is pressed into contact with the ground and travels, the traces of the finishing device 4 and the travel traces of the traveling devices 2, 2 are erased.

Further, a pair of left and right support rods 16, 16 are connected to the sled-like bodies 14, 14, respectively, and each of the support rods 16, 16 is provided on the machine frame 1 so as to be movable up and down. A screw shaft 18 is provided on the support arm 17 that connects the upper ends of the support arm 17 to lift it by abutting it from below, and an electric motor 18a is interlocked with the support arm 18, and one of the two screw shafts 18, 18 is connected to the support arm 17. The structure is such that only the sled-like bodies 14, 14 located on the rear side in the running direction are pressed to the ground.

In other words, the sled-like body 14 can be freely switched between a pressing grounding state in which the sled-like body 14 is pressed to the ground and erasing traces of the action of the finishing device 4 and running traces of the crawler-type traveling device 2, and a grounding release state in which it is lifted from the concrete floor surface. It is.

The finishing device 4 has three finishing blades 20 arranged at different phases in the circumferential direction at the lower end portions of the left and right pair of driving rotation shafts 19, 19 facing in the vertical direction.
It is constructed by attaching... Both rotating shafts 1
Gears 21, 21 are connected to each of 9, 19 so as to be freely rotatable as a unit, and both gears 21, 21 are engaged with each other, and a small diameter gear 23 interlocked with an electric motor 22, and one of the two rotating shafts 19, 19. A gear 19a integrally and rotatably connected is engaged with the rotating shafts 19, 19, and the rotating shafts 19, 19 are rotated in opposite directions, so that finishing work can be performed while minimizing adverse effects on travel.

Each of the drive rotation shafts 19, 19 is connected to the gear 2.
1 and 21 are spline-fitted so that they can only slide freely, and the drive rotation shafts 19 and 19 are held in the holder 24 so that they can only rotate freely, and a pair of screw shafts are connected between the holder 24 and the machine frame 1. 25,2
5 are interlocked and connected so as to be able to rise and fall freely, and an electric motor 25a is interlocked and connected to each of the screw shafts 25, 25, and by the lifting and lowering operation of the screw shafts 25, 25, the blade bodies 20, 20 are moved up and down with respect to the traveling vehicle body 3. A ground pressure adjustment mechanism 26 is configured to change the position and adjust the ground pressure of the blade bodies 20, 20 against the concrete floor surface. The blade bodies 20 are each made of a plate spring material.

The blade bodies 20... are attached to the rotating shafts 19, 19 in the same phase in a plan view, and the rotation locus of the tips of the blade bodies 20...
As shown in FIG. 1, the left and right parts intersect with each other, and are configured to allow good surface finishing over the entire left and right width of the vehicle body.

The machine frame 1 is made of lightweight material such as aluminum or FRP, and reduces the overall weight of the traveling vehicle body 3 as much as possible, reduces the surface pressure applied to the concrete floor surface from each of the crawler belts 6, 6, and reduces the weight of the vehicle as it travels. It is designed to effectively prevent damage to the surface of the concrete floor, such as peeling off the concrete floor.

In the figure, 27 is a loop-shaped rod for collision prevention provided around the entire circumference of the machine frame 1, and
A pressure-sensitive sensor 2 is provided at a predetermined location on the attachment portion to the machine frame 1 to detect when the rod 27 collides with another object.
8, 28 are attached, and the detection result by this pressure sensor 28 is inputted to a drive control section 29, which will be described later, so that the driving motors 8, 8 are automatically stopped when a collision with another object is detected. It is composed of

A finish detection sensor 3 is located on the outer side of each of the sled-shaped bodies 14, 14 in the front and rear direction, and detects the finished state of the concrete floor after surface finishing work.
0 is added to detect a case where the surface finish is poor, and the surface finish is re-performed based on the detected case, so that the surface finish can be reliably performed on the entire concrete floor.

Reference numeral 31 in the figure is a magnetic sensor, which effectively utilizes each of the vertical and horizontal reinforcements arranged in the concrete floor, counts the number of vertical and horizontal reinforcements passed through as the vehicle travels, and calculates the total number of horizontal reinforcements for the entire concrete floor based on that. It is configured so that the position of the traveling vehicle body 3 can be detected.

The drive control unit 29 controls the driving motors 8, 8 and the steering motor 1 by inputting a signal from the outside.
2, 12, a motor 22 for driving the finishing device 4, and a motor 18 for raising the sled-like body 14;
a, 18a are controlled and operated so that the vehicle automatically travels along a predetermined route. 32 indicates an input antenna to the drive control section 29.

Next, an example of a working style using the above-mentioned finishing machine will be explained (see FIG. 6).

Separated work areas A, B, with concrete floor
For C and D, a water absorption work vehicle W ₁ equipped with a water absorption device 33 is driven by remote control operation,
Suction and collect water on the surface of the concrete floor.

Hardness sensor 3 installed on water absorption work vehicle W ₁
4 and the detection results from the position sensors 35 that detect the positions in each of the work areas A, B, C, and D are input to the arithmetic processing unit 36,
In each of B, C, and D, a continuous running route from the hard side to the soft side of the concrete floor surface is calculated.

Based on the calculation of the travel route, a corresponding electric signal is input to the drive control unit 29, and the finishing machine _W2 is automatically run along the travel route while confirming the position using the magnetic sensor 31. , finishing the surface of concrete floors.

The ground pressure adjustment mechanism 26 is not limited to the one using the screw shaft 18 and the electric motor 18a as described above, but may include various modifications such as an elevating structure using a rack and a pinion linked to an electric motor, a hydraulic cylinder, etc. is possible.

Note that the surface pressure applied to the surface of the concrete floor by the ground support 3 is set to be greater than the ground pressure applied to the surface of the concrete floor by the finishing device 4, so that the weight of the finishing machine is The device 4 is configured to prevent the ground pressure from increasing abnormally.

The present invention can be applied to the surface finishing of various concrete floors such as buildings, gas stations, and parking lots.

The crawler belt 6 is not limited to rubber; for example, a large number of narrow iron pieces or FRP pieces whose outer surface is coated with Teflon,
Various structural modifications are possible, such as forming an endless band by pivotably connecting them to each other in the width direction.

[Brief explanation of drawings]

The drawings show an embodiment of the concrete floor finishing machine of the present invention, in which Fig. 1 is a partially omitted overall perspective view, Fig. 2 is a partially omitted side view, and Fig. 3 is a crawler type traveling device and its steering structure. 4 is a partially cutaway rear view of the sled-like body, FIG. 5 is a partially cutaway front view showing the finishing device and ground pressure adjustment mechanism, and FIG. 6 is a schematic plan view for explaining the working form. It is. 3... Traveling vehicle body, 4... Finishing device, 2... Crawler type traveling device, 6... Crawler belt, 14
... Sled body, 19 ... Drive rotation shaft, 20 ... Finishing blade body.

Claims (1)

[Scope of Claims] 1. A traveling vehicle body 3 equipped with a traveling device for traveling on a semi-solidified concrete floor surface, and a finishing device 4 for smoothing the concrete floor surface;
This concrete floor finishing machine is equipped with a sled-like body 14 that presses the ground to erase the traces of travel of the traveling device 2 and the traces of the action of the finishing device 4. A crawler-type traveling device 2 equipped with a smooth crawler belt 6 is disposed as the traveling device, and the sled-like body 14 is disposed at each outer location in the front-rear direction of each of the crawler-type traveling devices 2. A concrete floor finishing machine in which each of the shaped bodies 14 is configured to be switchable between a pressed grounding state and a lifted ground release state. 2. The concrete finishing machine according to claim 1, wherein the finishing device 4 has a finishing blade body 20 attached to a driving rotation shaft 19 facing in the vertical direction.