JPH039984B2 - - 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 concrete floor finishing, concrete floor finishing machines are used to smooth the concrete floor surface after it has been compacted after concrete placement and after removing moisture that seeped out on the surface. The present invention relates to a concrete floor finishing machine in which a finishing device for smoothing the surface of a concrete floor is connected to a traveling device.

[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, in any of the above cases, a skilled plasterer is required, and
Particularly in winter, when concrete hardens slowly, the work tends to be long, and there is a risk that working conditions can become harsh.

In the case of the latter method, when steering the finishing machine, the main body is tilted by operating the handle while the finishing trowel remains on the ground, and the finishing reaction force of the finishing trowel is utilized. This makes steering operations difficult, and moreover, it is easy to damage the concrete surface during steering. Furthermore, the vibrations of the engine 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 left and right crawler running devices, for example, are installed approximately in the center of the aircraft body, and a single finishing device, consisting of, for example, a plurality of finishing trowel-shaped bodies, is revolved around these running devices. Yes (for example, see Japanese Patent Application No. 59-248529).

[Problem that the invention seeks to solve]

However, when using the concrete floor finishing machine of the earlier application mentioned above, it was possible to finish the concrete floor with considerable accuracy and reduce worker fatigue, but it also suffers from the following problems. There was a risk of inconvenience occurring, and there was room for improvement.

In other words, since the finishing equipment revolves in one direction around the traveling device, the reaction force received from the concrete floor surface causes the traveling device to create a moment in either the left or right direction with respect to the traveling direction during work travel. This tended to make it difficult to control the aircraft to keep it moving straight.

On the other hand, when a pair of left and right crawler traveling devices is provided as a traveling device, the drive speeds of the left and right crawler traveling devices are set to be different in advance in order to offset the moment in either direction with respect to the traveling direction as described above. However, in this case, traces of passage by the crawler traveling device on one side tend to remain, which may lead to deterioration of finishing accuracy.

SUMMARY OF THE INVENTION In view of the above-mentioned circumstances, an object of the present invention is to provide a concrete floor finishing machine that can directly finish concrete floors with higher accuracy and has better stability during running.

[Means for solving problems]

The characteristic configuration of the concrete floor finishing machine according to the present invention is that an even number of finishing devices for smoothing the semi-solidified concrete floor surface are arranged around the traveling device.
Each of the finishing devices is configured to be rotatable, and half of the even number of finishing devices are configured to rotate in opposite directions.

[Effect]

In this way, an even number of finishing devices are arranged around the traveling device, and these finishing devices are rotated on their own axis without revolving around the traveling device, and half of the even number of finishing devices are rotated in opposite directions. This makes it possible to offset the reaction force that these finishing devices receive from the concrete floor surface, and to prevent the traveling device from receiving moment in either the left or right direction with respect to its traveling direction. be.

〔Effect of the invention〕

Therefore, it is possible to reduce the loss of running stability of the machine during work traveling, which makes it easier to control the machine's running and to minimize damage to the concrete floor surface caused by the traveling equipment. . As a result, it has become possible to provide a concrete floor finishing machine that can finish the surface of a concrete floor with high precision, is easy to operate, and is excellent in both workability and operability.

〔Example〕

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

As shown in FIGS. 1 and 2, a cylindrical body 3 is erected on a vehicle body 2 equipped with a pair of left and right crawler traveling devices 1 driven by a motor (not shown). 3, a cylindrical body 4 is fitted onto the outside through a linear bearing (not shown) so that it can only slide vertically. A total of four frames 5 are fixed to this cylinder 4 with a phase shift of 90 degrees in the circumferential direction.
A motor 6 is attached to the tip end of each of the motors 6 facing downward, and a boss 7 is attached to the rotating shaft 6a of each motor 6. A total of four approximately L-shaped frames 8 are fixed to each of these bosses 7 with a phase shift of 90 degrees in the circumferential direction, and a removable iron-shaped member 9 is attached to the lower end of each of the frames 8.
a is attached, and a total of four pieces of trowel-shaped bodies 9a are attached.
Around the traveling device 1, a finishing device 9 consisting of
Four finishing devices 9 are arranged, and these finishing devices 9 are configured to be rotatable on their own axis by each motor 6, and as shown by arrows in FIG. They are constructed so that they rotate in opposite directions.

A linear head motor 10 is mounted and fixed on the vehicle body 2, and a rack portion 10a of the linear head motor 10 is fitted into one of the frames 5 so as to be relatively slidable therein. Flanges 11 and 12 such as the rack portion 10a are attached at the upper and lower positions. Both flanges 11, 12
Springs 13 and 14 are interposed between the frame body 5 and the frame body 5, so that a total of four frame bodies 5 and the cylinder body 4 are elastically held on the rack portion 10a of the linear head motor 10. A nut member 15 is screwed onto the upper end of the cylindrical body 3.
A compression spring 16 is interposed between the compression spring 16 and the cylinder 4 to elastically press a total of four finishing devices 9 onto the surface of the concrete floor A. It is configured to detect the pressing force of the finishing device 9 against the concrete floor A by a load cell (not shown) interposed between the finishing device 9 and the concrete floor A.

As shown in FIG. 3, a jig 17 having dovetail grooves 17a on both sides and pin holes 17b is fixed to the lower end of each frame 8. On the other hand, a jig 18 having a substantially U-shaped cross section is fixed to each trowel-shaped body 9a, and a protrusion 18a that engages with the dovetail groove 17a is provided on the inner surface of the jig 18. , and another pin hole 18b matching the pin hole 17b is bored. Therefore, by sliding the jig 18 on the side of the trowel-shaped body 9a in the direction of the arrow in the figure, the protrusion 18a is engaged with the dovetail groove 17a, and the pin 19 is inserted into both pin holes 17b and 18b.
By inserting , each trowel-shaped body 9a can be easily and reliably attached to the lower end of each frame 8.

Although not shown, the motor for the traveling device 1, each motor 6 for the finishing device 9, and the captire cords for transmitting operation signals to the linear head motor 10 are all housed in the cylindrical body 3. and is connected to a control device in a relay box 20 attached to the upper end of the cylindrical body 3.

Next, the operation of the concrete floor finishing machine according to the present invention will be explained. When the vehicle body 2 is moved forward and backward while driving the pair of left and right traveling devices 1, as each motor 6 is rotationally driven, the traveling device 1 is centered. The opposing traveling devices 9 rotate in opposite directions, and each trowel-shaped body 9a smoothes the surface of the semi-solidified concrete floor A. In this way, since the same number of finishing devices 9 rotate in opposite directions, the reaction forces that each finishing device 9 receives from the concrete floor A cancel each other out, and meandering of the vehicle body 2 is prevented. During this finishing work,
The pressing force of the finishing device 9 against the surface of the concrete floor A can be confirmed by a load cell interposed between the compression spring 16 and the cylindrical body 4, and if necessary, the nut member 15 can be rotated to move it up and down. By moving the finishing device 9, the pressing force of the finishing device 9 can be adjusted. However, this pressing force can be adjusted using the linear head motor 10.
While checking the pressing force from the load cell,
Adjustment is also possible by changing the relative position of the finishing device 9 with respect to the finishing device 9.

In addition, in such finishing work, it is ideal to carry out rough finishing while the concrete floor A is relatively soft, and to carry out final finishing when it is hard.
The trowel-like body 9a which is rigid and has a large inclination angle Θ and is elastic is suitable for final finishing. For this purpose, it is necessary to replace each trowel-shaped body 9a, and since concrete hardens quickly, especially in the summer, the replacement must be done quickly. In this respect, according to this concrete floor finishing machine, it can be easily removed by simply removing the pin 19 and sliding the trowel-shaped body 9a side, and another trowel-shaped body 9a can also be easily attached by sliding it. Therefore, the trowel-shaped body 9a can be replaced easily and quickly. Moreover, in the installed state, the protrusion 18a of the jig 18 on the side of the trowel-shaped body 9a is aligned with the dovetail groove 1 of the jig 17 on the frame 8 side.
Since it is reliably engaged with 7a over an appropriate length, the trowel-shaped body 9a does not get rashed, and the surface of the concrete floor A can be reliably finished to a good quality.

In the above embodiment, four finishing devices 9 are arranged around the traveling device 1, but the number of finishing devices 9 can be selected. In short, it is sufficient to arrange an even number of finishing devices 9 and configure half of them to rotate in mutually opposite directions. Also,
It is not necessarily necessary to reverse the finishing devices 9 facing each other with the traveling device 1 at the center, but by reversing half of them at a time, the reaction forces acting on each finishing device 9 can be offset.

Further, in the above embodiment, the present invention is implemented by arranging the four finishing devices 9 around the traveling device 1 so as to overlap each other in the lateral direction when viewed from the traveling direction, as shown in FIG. It's okay.

[Brief explanation of the drawing]

1 to 3 show an embodiment of the concrete floor finishing machine according to the present invention, in which FIG. 1 is a partially cutaway plan view, FIG. 2 is a partially cutaway side view, and FIG. 3 is a trowel-shaped FIG. 4 is a perspective view showing a body attachment structure, and FIG. 4 is a schematic plan view showing another embodiment of the present invention. 1... Traveling device, 9... Finishing device, A... Concrete floor.

Claims (1)

[Scope of Claims] 1. In a concrete floor finishing machine in which a finishing device 9 for smoothing the surface of a semi-solidified concrete floor A is connected to a traveling device 1, an even number of finishing devices 9 are arranged around the traveling device 1. Arrange each finishing device 9
This concrete floor finishing machine is configured to be able to rotate on its own axis, and half of the even number of finishing devices 9 are configured to rotate in mutually opposite directions. 2. A patent in which an even number of the finishing devices 9 are arranged around the traveling device 1 at approximately equal intervals, and the finishing devices 9 facing each other are rotated in opposite directions with the traveling device 1 as the center. A concrete floor finishing machine according to claim 1.