JPH0360986B2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention is a method for mechanizing concrete leveling work and finishing work, which is carried out in concrete work to ensure the flatness of the floor, especially immediately after placing the floor concrete. Regarding the leveling machine.

BACKGROUND ART Conventionally, concrete leveling and finishing work in concrete construction work has generally been carried out using the following procedures and methods.

The ready-mixed concrete is transported to a target location or a nearby location using a concrete pump truck or the like, and the transported ready-mixed concrete is distributed in appropriate amounts by human power or the pumping power of the pump truck.

The distributed ready-mixed concrete is moderately compacted using a vibrator, etc., and the top level of the ready-mixed concrete is maintained using a leveling tool such as a dragonfly. This is the so-called leveling work.

By the way, a laser level meter is used to determine the level of the fresh concrete.

After several hours of curing after the above-mentioned leveling work, the top of the hardening fresh concrete is pressed down with a metal trowel or the like using human power and body weight to create a smooth surface. This is the finishing work.

Problems to be Solved by the Invention () Since most of the above-mentioned conventional procedures are performed manually, there are many variations in the precision of the finished surface.

() In addition, large-scale construction sites require a large number of workers (skilled workers), which is difficult to secure, and there are limits to construction efficiency.

() Furthermore, due to the nature of concrete, it usually takes from several hours to half a day from concrete pouring to the time when final finishing is possible (outside temperature,
(varies depending on concrete mix, etc.)
Since the work is restricted within this range, the work often involves deep liquid work, which poses the problem of creating an unfavorable working environment.

Means to solve the problems As a means to solve the above conventional problems,
The concrete leveling machine of this invention is shown in Figures 1 to 6.
As a preferred embodiment is shown in the figure, (a) a running body 1 formed by an endless track 2, (b) a support arm 3 whose base is attached to the running body 1 and protrudes forward, and (c) a support arm. A horizontal member is installed at the front end of 3, and a traveling rail 5 of a required length is attached substantially horizontally to the horizontal member, and (d) installed so as to move back and forth along the traveling rail 5. (e) a vertically movable device 7 attached to the movable table 6 so as to be able to move up and down; and a leveling mechanism section 8 attached to the lower end of the up-and-down device 7.

The present invention also provides that the base of the support arm 3 is attached to the traveling body 1 so that its level can be adjusted via a level adjustment mechanism 10;
Turntable installation 1 that can be moved in and out vertically downward
1 is also provided.

Function: This concrete leveling machine has a running body 1 using endless track 2 with a large ground surface, which freely runs over floor reinforcing bars or poured concrete, making it possible to perform concrete leveling and finishing work with good mobility. .

In principle, this concrete leveling machine runs an unmanned traveling body 1 under remote control to perform leveling work and finishing work.

When leveling concrete, use the traveling body 1.
level adjustment mechanism 1.
0 to adjust the levelness of the support arm 3, and the vertical device 7 to adjust the height of the leveling mechanism section 8 to the leveling level of the top of the concrete. This adjustment is
This is automatically performed using a combination of a laser receiver 13 (FIG. 3B) provided in the vertical device 7 and a laser level meter.

Thereafter, the screw 9 is rotated, and at the same time, the movable table 6 is reciprocated along the traveling rail 5 to the limit of its length, thereby leveling the concrete. That is, by the feeding operation of the rotating screw 9, concrete in excess of the leveling level is removed, and concrete is supplied to fill in the insufficient low parts and recesses.

Thus, at one working position, it is possible to efficiently perform work on an area approximately equivalent to the product of the reciprocating stroke of the movable table 6 and the length of the screw 9 (see FIG. 1).

Moreover, the construction of the projecting corner and the internal corner can be easily carried out by arranging the running rail 5 parallel to or at right angles to the projecting corner and the internal corner.

The finishing work can be carried out intermittently by stopping the traveling body 1 at each work position as in the case of the above-mentioned leveling work. It is also possible to carry out the method of continuous construction while running.

In addition, in order to make the finishing work closer to the conventional finishing using a metal trowel, a special screw 9 for finishing is used, in which a flat bar 14 is fixed to the outer periphery of the screw 9 in parallel to the screw shaft 9a, as shown in FIG. ’ to do this. Moreover, the vertical device 7
is set in a free state, and the finishing pressing force applied to the concrete surface is the sum of the weights of the leveling mechanism section 8 and the up/down device 7.

Alternatively, a method of applying a pre-adjusted pressing force using the up-and-down device 7 to perform the finishing work is also carried out.

In this way, when the entire leveling work or finishing is completed using one working device, the traveling body 1 is moved forward (or backward) by one step, and the same process is repeated to proceed with the work.

When it is necessary to change the traveling method or position of the traveling body 1, first the endless track 2 is floated higher than the top level of the concrete using the turntable 11, and then the traveling body 1 is moved, for example, 90 degrees in the desired direction. This is done by turning the running body 1 by 1° and then lowering the running body 1 until the endless track 2 touches the floor.

Therefore, the direction can be properly changed to the desired direction at the same position without causing any damage to the concrete 26.

First Embodiment Next, a preferred first embodiment of the present invention shown in FIGS. 1 to 3 of the drawings will be described.

The running body 1 is constructed in a crawler type having a running section formed by endless tracks 2, 2. Also, endless track 2
In order to avoid roughening the top of the poured concrete 26 as much as possible and to prevent damage to the floor reinforcing bars, the structure is such that geta teeth 2a made of hard rubber are attached.

The height of the geta teeth 2a is approximately the same as or slightly larger than the leveling level cover thickness of fresh concrete placed on the floor reinforcing bars, and the total weight of the concrete leveling machine is equal to the height of the geta teeth 2a. The tip is configured to abut and support floor reinforcing bars etc. in a line contact state.

Therefore, the surface of the fresh concrete where the traveling body 1 has passed is only left with the marks of the geta teeth 2a, and is not further roughened. Moreover, the above-mentioned extraction marks are naturally filled in due to the fluidity of the ready-mixed concrete.

The traveling body 1 has a swivel base 1 on the endless tracks 2, 2.
It is mounted on the tower so that it can be rotated freely via the shaft 5, and is integrally equipped with a control device 16. Control device 16
A radio receiver, a running body 1, a moving table 6, a lifting device 7, a leveling mechanism section 8, and other operation control devices are built in.

The support arm 3 has a planar shape similar to an isosceles right-angled isosceles triangle as seen in FIG.
A total of three points, including the apex portion 3a serving as the base and a position of equal length in front of the apex portion 3a, are attached to the traveling body 1 so that the level can be adjusted. That is, the apex portion 3
point a is freely supported by a spherical bearing 17, and the remaining two points are supported by level adjustment mechanisms 10, 10. This level adjustment mechanism 10 is a screw type in which the height is adjusted by turning a parent nut using a hydraulic motor (or electric motor) on a screw shaft 1b that is fixed on a base 10a on the side of the traveling body 1 and stands upright. (not limited to the top screw type), and the horizontality or height of the support arm 3 can be automatically adjusted.

At the front end of the support arm 3 which is attached to the base on the traveling body 1 and projected forward as described above,
A high-rigidity box beam 4 with a length of about 2 m is horizontally arranged at the base of a right-angled isosceles triangle when viewed from the plane of FIG. It is attached as a frame material (supporting material). On the front side of the box beam 4,
A traveling rail 5 having the same length as the box beam 4 is attached. A moving platform 6 that reciprocates along the traveling rail 5 is installed.

As shown in FIGS. 3A and 3B in detail, the movable platform 6 holds the running rail 5 by a slide block 17 (FIG. 3A), and also has a running rail on the front of the box beam 4. A pinion 19 that meshes with a rack 18 installed parallel to the hydraulic motor (or electric motor) 20 installed on the moving table 6
It is configured to rotate and move back and forth as a self-propelled type.

Further, the details of the vertical movement device 7 are shown in FIG. 3A.
It is configured as shown in B. That is, a hanger 22 is attached to the lower ends of two guide rods 7a, 7a, which are provided perpendicularly to the movable table 6 and are movable up and down. Also, the output shaft 21a of the hydraulic cylinder 21, which is fixed to the movable table 6 vertically downward in parallel with the guide rod 7a,
It is connected to the hanger 22.

Therefore, the hanger 22 is vertically moved up and down by the hydraulic cylinder 21 by a required stroke. The leveling mechanism section 8 is supported by this hanger 22.

As described in detail in FIGS. 1 and 2, the leveling mechanism 8 is centered on a single screw 9 arranged substantially horizontally and substantially perpendicular to the traveling rail 5. The screw 9 has an outer diameter of Φ200 and a length of about 1 m, and both ends thereof are rotatably supported by the cover 23. The cover 23 is attached to the hanger 2
It is attached to 2. Further, a hydraulic motor 24 installed on the cover 23 and the screw 9 are connected by a transmission mechanism 25.

The screw 9 has an outer diameter of Φ200, and is rotated at a speed of about 90 to 160 revolutions per minute during leveling work.

In other words, when leveling the poured concrete 26 with this concrete leveling machine, first the traveling body 1 is moved almost linearly forward (or backward) over the floor reinforcing bars or the poured concrete 26 using the endless track 2, The traveling body 1 is stopped at a predetermined work position. Then, the level adjustment mechanism 10 adjusts the horizontality of the support arm 3, and then the vertical device 7 sets the level of the top end of the concrete 26.

Thereafter, the screw 9 is rotated by the hydraulic motor 24, and the movable table 6 is reciprocated to the limit of the length of the traveling rail 5, thereby leveling the concrete. In this way, the rotating screw 9 removes the excess amount of concrete by its feeding action, and on the other hand, it supplies concrete to areas that are low or depressed due to insufficient amount of concrete, thereby achieving effective leveling work. It is.

Therefore, in one working position, the moving platform 6
The area corresponding to the product of the reciprocating stroke and the length of the screw 9 can be leveled (Fig. 1). In addition, by arranging the running rails 5 parallel to or at right angles along the outer and inner corners, leveling and finishing work on the outer and inner corners can be easily and reliably performed.

In addition, the concrete 26 is
To set the leveling level of the top, a laser receiver 13 is installed on one of the guide rods 7a of the vertical device 7 (FIG. 3B), and automatic control is performed in combination with a laser level meter.

Reference numeral 11 in FIG. 2 is a turntable installed in the center of gravity device of the concrete leveling machine (or the traveling body 1). This turntable 11 has an endless track 2
to levitate the track 2 higher than the top level of the concrete 26, turn the traveling body 1 in the desired direction, for example to the position indicated by the two-dot chain line in FIG. 1, and place the endless track 2 on the concrete 26 again. This makes it possible to change the direction of the concrete leveling machine without disturbing the concrete top level.

Next, 28 in FIG. 2 is a vibrator for erasing footprints of the endless track 2, which is installed at the rear of the endless track 2, and a sliding plate 29 is attached to the lower end of the vibrator.

Other Embodiments As the means for moving (driving) the moving table 6 and the up/down device 7, a ball screw mechanism or a mechanism using an endless chain may be used.

Second Embodiment FIG. 4 shows a concrete leveling machine configured for finishing work.

Its basic configuration is the same as that of the first embodiment. However, by inserting a piece 12 of hard rubber (or plastic or other material) between the clog teeth 2a of the endless track 2 and attaching and fixing it removably, this reduces the ground pressure and prevents the top of the concrete from becoming disordered. This feature is characterized by a structure that prevents this.

Further, as for the screw 9 of the leveling mechanism section 8, as shown in detail in FIG.
A special screw 9' made up of a flat bar 14 of about mm is used for finishing.

During the finishing work using the special screw 9', the up-and-down device 7 is left in a free state so that it can closely follow the level of the top of the concrete due to the leveling work. In other words, the finishing pressing force against the concrete surface includes the weight of the leveling mechanism section 8 and part of the weight of the up/down device 7.

However, it is also better to apply a preset pressing force using the up/down device 7 to perform the finishing work.

The screw rotation speed during finishing work is approximately
It is said to be around 40 rpm.

Other Embodiments As a finishing work jig in place of the above-mentioned special screw 9', a leveling mechanism section 8 with a finishing plate 30 attached to the cover 23 as shown in FIG.
It is also possible to use Finishing plate 3
The zero angle is adjusted with an adjustment jack 31.

Effects of the Invention As described above in detail in conjunction with the embodiments, the concrete leveling machine of the present invention makes it possible to completely mechanize leveling work and finishing work, especially for floor concrete, in concrete work. It is possible to significantly improve construction quality and construction efficiency. It can also greatly contribute to improving the working environment and resolving difficulties in securing a workforce.

By the way, regarding the construction quality, especially the level of the concrete floor surface, the accuracy of the initial leveling work greatly affects the later finishing accuracy, but compared to the leveling work and finishing work using conventional intermittent level checks. Therefore, the concrete leveling machine of the present invention can perform leveling and finishing operations while continuously performing level checks, resulting in high level accuracy and high construction quality.

In addition, this concrete leveling machine can easily level and finish the outside and inside corners, and there is almost no unworkable space, so the amount of manual replenishment work can be greatly reduced. .

[Brief explanation of drawings]

1 and 2 are a plan view and a front view of a concrete leveling machine according to the present invention, FIGS. 3A and 3B are a detailed side view and a front view of the movable table portion, and FIG. 4 is a concrete leveling machine according to the present invention. A front view of a concrete leveling machine according to a second embodiment,
Figure 5 is a detailed view of the special screw for finishing, Figure 6
The figure shows a detailed view of the finishing plate.

Claims (1)

[Scope of Claims] 1 (a) A running body 1 formed by an endless track 2, (b) A support arm 3 whose base is attached to the running body 1 and protrudes forward, and (c) A front end portion of the support arm 3. A horizontal member is installed on the horizontal member, and a traveling rail 5 of a required length is attached substantially horizontally to the horizontal member, and (d) a movable platform is installed to reciprocate along the traveling rail 5. 6, (e) a vertically movable device 7 attached to the movable table 6, and (f) a rotary screw 9 arranged horizontally and substantially perpendicular to the traveling rail 5, and supporting the screw. a leveling mechanism section 8 comprising a cover 23 and a rotation drive device for the screw; and a leveling mechanism section 8 having the cover 23 attached to the lower end of the vertical device 7. 2. A concrete leveling machine characterized in that the base of the support arm 3 according to claim 1 is attached to the traveling body 1 so that the level can be adjusted via a level adjustment mechanism 10. 3 Traveling body 1 described in claim 1
This concrete leveling machine is equipped with a turntable device 11 that can be moved in and out vertically downward at approximately the center of gravity of the machine.