JPH0340778B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is a so-called method for constructing carpets, long flooring materials, etc. as indoor floor finishing materials on concrete floor slabs without a mortar base. In construction work called direct finishing of concrete floors, concrete floor finishing machines are used to smooth the concrete floor surface after it has been compacted after concrete has been placed and water that has oozed out from the surface has been removed. The present invention relates to a concrete floor finishing machine equipped with an apparatus and a finishing device for smoothing a semi-solidified concrete floor surface.

[Conventional technology]

In the above-mentioned concrete floor direct finishing work, conventionally, the plasterer uses a trowel to finish while observing the solidification state of the concrete floor surface, or the method uses several finishing trowels driven and rotated by an engine installed in the main body. The object is grounded on the concrete floor surface, and a finishing machine (product name: Trowel) is used to finish the object while the worker holds it by a handle extending from the main body and moves it, up to semi-finishing.
After that, methods such as plastering with a trowel finish were used. However, when using the above-mentioned conventional method, not only does the plasterer need to be highly skilled, but also the work tends to take a long time, especially in the winter, when concrete hardens slowly, which can lead to harsh working conditions. In addition, in the latter case, when steering the finishing machine, the main body is tilted by operating the handle while the finishing iron-like body is kept on the ground, and the finishing machine is operated using the ground reaction force of the finishing iron-like body. It is difficult to steer the steering wheel, and it is easy to damage the concrete surface when steering.Furthermore, engine vibrations are transmitted to the worker, and if the worker continues to work for a long time, there is a risk that the worker will become fatigued.

Therefore, as shown below, a method was proposed in which direct finishing of the concrete floor was performed using a finishing device attached to the self-propelled vehicle body. That is, a pair of crawler traveling devices are arranged at the front and rear of the aircraft, and approximately at the center of the pair of traveling devices,
A finishing device is provided in which a plurality of finishing trowel-like bodies rotate around an axis. (For example, the patent application
-Refer to No. 212892).

However, when using the concrete floor finishing machine of the earlier patent application mentioned above, although it was possible to finish concrete with considerable precision and to reduce worker fatigue, it still had the following disadvantages: There was a risk that this would occur, and there was room for improvement.

In other words, when traveling during work, traces of the traveling device on the rear side of the finishing device remain, so in order to erase these traces, it is necessary to install a leveling tool such as a sled further behind the traveling device. There is, and this is,
One of the reasons for the increased weight of the aircraft was that it tended to have poor finishing due to the aircraft sinking on unhardened concrete floors. Furthermore, the leveling tool did not erase traces of passage very well.

On the other hand, since the finishing device is located between the pair of traveling devices, the finishing range of the finishing device is small considering the longitudinal length of the fuselage. Furthermore, since space is required for moving the traveling equipment, there tends to be a large area that cannot be finished by this floor finishing machine, especially at the edges of the floor slab, and finishing by hand is still quite difficult. It was necessary.

[Problem that the invention seeks to solve]

SUMMARY OF THE INVENTION In view of the above-mentioned circumstances, an object of the present invention is to perform direct finishing of concrete floors with higher precision and to save labor.

[Means for solving problems]

A characteristic configuration of the concrete floor finishing machine according to the present invention is that the finishing device is connected to the outside of the traveling device via a coupling mechanism, and is composed of a plurality of trowel-shaped bodies distributed around the traveling device. and a drive mechanism for rotating the finishing device around the traveling device and a drive mechanism for moving the traveling device and the finishing device up and down relative to each other.The operation and effect thereof are as follows. That's right.

[Effect]

In other words, since the finishing device is located outside the traveling device and rotates around the traveling device, the finishing range by the finishing device can be made larger than the entire body. In addition, this finishing machine can finish the edges of the floor slab without considering the space for moving the traveling equipment, significantly reducing the number of areas that require manual finishing. .

Furthermore, since one of the traveling devices conventionally provided at the front and rear can be omitted, the transmission mechanism can be simplified. Moreover, since the traces of the traveling device are erased by themselves by the rotation of the finishing device, there is no need to provide a separate leveling tool, which is conventionally required. Furthermore, since the traveling device and the finishing device work together to support the machine body on the ground during work, the traveling device itself can be made smaller and lighter.

In addition, by activating the drive mechanism for relative vertical movement and forcibly lowering the finishing device below the traveling device, only the multiple trowel-shaped bodies scattered around the traveling device are grounded on the concrete floor surface. With the aircraft stably supported, the traveling gear is raised above the concrete floor surface, and in this state, the rotation drive mechanism is activated to rotate the traveling gear and change the direction of the traveling gear. After the change, the direction change is completed by activating the drive mechanism for relative vertical movement and raising the finishing device so that the traveling device is in contact with the concrete floor surface.
This means that you can lift the traveling gear and change direction.
In addition, the traveling device can be lifted using the finishing device that is originally provided.

〔Effect of the invention〕

As a result, according to the present invention, it is possible to improve work efficiency and reduce the number of personnel required for direct finishing work on concrete floors, shortening work time and reducing labor costs. It has become possible to measure cost reductions.

In addition, since the weight of the machine can be made smaller than before, there is less risk of poor finishing caused by sinking of the machine on concrete floor surfaces that have not yet hardened. Since it is erased by itself, it has become possible to finish the concrete floor surface with high precision.

Therefore, overall, direct finishing work on concrete floors can now be carried out under reasonable working conditions, extremely efficiently, and with high finishing accuracy.

In other words, it has become possible to solve the intended technical problem.

Moreover, since the direction can be changed by lifting and rotating the traveling device, when changing direction,
Not only can it prevent the traveling device from sliding on the concrete floor surface and make it rough, but it also uses the finishing device that is originally provided as a grounding part for lifting the traveling device, which prevents increased costs and mass production. do not have.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

As shown in FIGS. 1 and 3, a finishing device B for smoothing the surface of a concrete floor is connected to a vehicle body 1 equipped with a pair of left and right crawler traveling devices A, and a concrete floor used for direct finishing work on the concrete floor. A finishing machine is configured.

Both crawler traveling devices A each include a driving wheel body 2 attached to both ends of a vehicle body 1, an idling wheel body 3 for guiding,
It also consists of an endless belt-like body 4 made of rubber and having a flat ground contact side, which is stretched across both wheels 2 and 3. The left and right drive wheels 2 are interlocked and connected to separate driving motors 5 that are capable of forward and reverse rotation, and are configured so that the aircraft can move forward and backward and change direction by combining the forward and reverse rotation of both motors 5. has been done. In addition, in the front and rear intermediate portions of both wheels 2 and 3,
A sled-shaped body 6 extending downward from the vehicle body 1 is pressed against the inner circumferential surface of the belt-shaped body 4 on the ground contact side, and the crawler traveling device A is installed over a wide area to reach the concrete surface that has not hardened yet. It is designed to prevent the aircraft from sinking. In the figure, 4a is a belt-like body 4
This is a scraper for scraping off concrete adhering to the outer peripheral surface.

Further, as shown in FIGS. 1 and 2, the finishing device B is composed of four pieces of trowel-like bodies 7, and these trowel-like bodies 7 extend from the center of the vehicle body 1 toward the periphery in plan view. , is attached to the tip of a steel pipe frame 8 arranged radially with a phase difference of 90 degrees. In other words, the trowel-shaped body 7 is the traveling device A.
They are distributed around the area. Then, a circular pipe frame 19 having a radius approximately equal to the rotation radius of the tip of each rod-shaped body 7 is bolted to the tip side of the pipe frame 8 to which each rod-shaped body 7 is attached via a support rod 20. This is designed to prevent the trowel-shaped body 7 and other components from colliding with other objects when finishing the concrete floor while moving.

As shown in FIG _.
It is attached so that it can swing freely around it. and,
By rotating the bolt 11 screwed into the nut 10 welded to the pipe frame 8, this bolt 1
The bracket 9 is swung around the axis _P1 by contact with the stepped portion 11a at the tip of the bracket 1, so that the trowel-shaped body 7 can be set at an arbitrary angle with respect to the concrete floor surface. Further, the degree of inclination of the trowel-like body 7 can be visually confirmed by a scale 21 on which a pointer 9a connected to the bracket 9 is located.

As shown in FIG. 4, the base end of each pipe frame 8 is fixed above the vehicle body 1 around an annular connector 12, and this connector 12 connects to the finishing device side cylindrical body in the vertical position. It is attached to a spherical bearing seat 14 which is fitted onto a spherical seat 13 so as to be slidable up and down, so as to be relatively rotatable around an axis _P2 . Then, a bracket 16 to which a pair of rod-shaped bodies 15 are fixed, sandwiching one pipe frame 8 from both sides, is similarly fitted onto the cylindrical body 13 so as to be relatively rotatable. It is interlocked and connected to a motor 17 attached to the rod-shaped body 13 via a deceleration mechanism 18, and each rod-shaped body 7 is rotated by the rotation of the motor 17.
is configured to be rotated around the vehicle body 1 to smooth the surface of a semi-solidified concrete floor. That is, the motor 17 serves as a drive mechanism for rotating the finishing device B around the traveling device A.

The finishing device side cylindrical body 13 is attached to a vehicle body side cylindrical body 22 which is vertically fixed to approximately the center of the vehicle body 1.
Both cylindrical bodies 13 and 22 are externally fitted via a linear bearing 23 that allows relative vertical sliding.
Then, a bracket 24 is attached to the finishing device side cylindrical body 13.
Fix one end of the rack part 25b through the
A linear head motor 25 to which a head portion 25a is fixed is provided.
The structure is such that the cylindrical bodies 13 and 22 are caused to slide vertically relative to each other, thereby causing the vehicle body 1 and the finishing device B to move vertically relative to each other. In other words, the linear head motor 25 serves as a drive mechanism for relatively moving the traveling device A and the finishing device B up and down.

This concrete floor finishing machine is adapted to change the direction of the machine body by using the above-mentioned connecting structure of the two cylindrical bodies 13 and 22 and the linear head motor 25. That is, when changing the direction of the aircraft, first, each of the trowels 7 is grounded on the concrete floor surface, the aircraft is stably supported by the four trowels 7, and the linear head motor 25 is activated to move the vehicle body 1. Raise it relative to finishing device B. In this state, when the finishing device rotation motor 17 is operated, the vehicle body 1 rotates around the axis _P2 . When the vehicle body 1 faces a predetermined direction, the finishing device rotation motor 17 is stopped, and the linear head motor 25 is stopped.
The vehicle body 1 is lowered to the concrete floor surface by the operation of , and the direction change of the vehicle body is completed.

Therefore, compared to the case where the direction change of the aircraft is performed simply by the difference in the moving speed of the left and right crawler traveling devices A, the turning direction can be made with almost no damage to the concrete floor surface caused by the direction change. This can be done in a small radius, and the aircraft can be accurately moved to a predetermined position.

between the first flange 26 connected to the finishing device side cylindrical body 13 and the lower end of the spherical seat 14; and the second flange 27 loosely fitted to the cylindrical body 13;
Springs 28 and 29, which are respectively fitted onto the cylindrical body 13, are interposed between the spherical seat 14 and the upper end thereof. Further, above the second flange 27, a nut 30 is screwed onto this cylindrical body 13, and rotation of this nut 30 causes the second flange 27 to
While checking the indicated pressure from the three load cells 31 for adjusting the pressing force interposed between the nut 30 and the nut 30, move the spherical seat 14 up and down together with the second flange 27, and press the concrete floor with each trowel-shaped body 7. The pressing force against the surface can be adjusted to a predetermined pressure.

The pressing force of the trowel-shaped body 7 against the concrete floor surface can be adjusted by rotating the adjusting nut 30 described above, as well as by using the linear head motor 2 described above.
This can also be done by changing the relative position of the finishing device B with respect to the vehicle body 1 while confirming the pressure indicated by the load cell 31 for adjusting the pressing force. In the figure, 32 is a load cell for detecting rotational torque.

The above-mentioned pair of traveling motors 5, finishing device rotation motor 17, and linear head motor 25
Captire cords 33 for transmitting operation signals to the finishing device are housed together in both cylindrical bodies 13 and 22, and are connected to a control device 35 in a relay box 34 attached to the upper part of the finishing device side cylindrical body 13. It is connected. As shown in FIG.
is connected to the operating device 38 via a connector 36 on the top of the relay box 34 and a relay cord 37 wound around a rod 39 extending from the connector 36.
The concrete floor finishing machine is connected to the concrete floor finishing machine so that an operator can remotely control various operations using the concrete floor finishing machine by holding an operating device 38.

The configuration for relatively moving up and down the vehicle body 1 to which the traveling device A is attached and the finishing device B can be changed as appropriate. For example, instead of the linear bearing 23 in the previous embodiment, the car body 1 and the finishing device B are connected by a combination of a rack and a pinion gear, and a motor capable of forward and reverse rotation is linked to the pinion gear. You can do it like this. Further, in the previous embodiment, a hydraulic double-acting cylinder may be provided in place of the linear head motor 25, and these will be referred to as a drive mechanism 25. Furthermore, the combination of the rack and pinion gear described above, or the linear bearing 23 in the previous embodiment, is collectively referred to as a coupling mechanism 23.

The shape, mounting structure, or number of the trowel-shaped bodies 7 constituting the finishing device B can be changed as appropriate. For example, even if the trowel-shaped bodies 7 themselves rotate around the car body 1 while rotating on their own axis. good. In addition, finishing equipment B
In order to rotate the motor around the vehicle body 1, in the previous embodiment, instead of the finishing device rotation motor 17,
Annular connector 12 with pipe frame 8 attached
A rotor may be incorporated within the spherical seat 14, and a stator may be incorporated within the spherical seat 14, so that this connection structure itself constitutes an electric motor, and these are referred to as a drive mechanism 17 for rotating the finishing device B.

The configuration for adjusting the pressing force by each trowel-shaped body 7 can also be changed to various types. For example, a concrete hardness detection device consisting of a load cell and a steel rod attached to the tip of the load cell can be installed, and the steel rod can be adjusted. The concrete hardness detection device can be configured to detect the load required to plunge a certain length into a semi-solidified concrete floor using a load cell, and calculate and display an appropriate pressing force from the detected load. The appropriate pressing force value determined by the method and the pressure value indicated by the pressing force adjustment load cell 31 are input into the control circuit of the linear head motor 25, so that the motor 25 automatically adjusts the pressing force. It may be configured as follows. Moreover, it is also possible to use various pressure sensors instead of the load cell 31 in order to confirm the pressing force.

Instead of the pair of left and right crawler traveling devices A, a plurality of drive rollers may be provided on each of the left and right sides, and these will be referred to as traveling devices A.

Furthermore, the relay box 34 in the previous embodiment
Instead, a receiver is installed and the signal from the transmitter held by the worker is sent to this receiver using wireless to operate the machine, or the finishing machine is used to recognize the current position. A position detection sensor is installed,
The method of operating the machine can be changed as appropriate, such as proceeding with the work while determining the travel route based on information from the sensor and the hardness detection device 32, or performing fully automatic operation.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a side view of a concrete floor finishing machine with a partial cutaway, FIG. 2 is a partially omitted plan view of the concrete floor finishing machine, and FIG. Partially cutaway rear view, 4th
The figure is an enlarged sectional view of the main part, and FIG. 5 is a view taken along the line V-V in FIG. 1. A...Traveling device, B...Finishing device, 7...Rice-shaped body, 17...Drive mechanism, 23...Connection mechanism, 25
...Drive mechanism.

Claims (1)

[Claims] 1. In a concrete floor finishing machine equipped with a traveling device A and a finishing device B for smoothing a semi-solidified concrete floor surface, the finishing device B is connected to the outside of the traveling device A via a coupling mechanism 23. a driving device 17 for rotating the finishing device B around the traveling device A; This concrete floor finishing machine is provided with a drive mechanism 25 for moving the finishing device B and the finishing device B up and down relative to each other.