JPS63194068A - Concrete leveling machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] Industrial Field of Use This invention is used in the field of concrete pouring work for construction, particularly in the field of pouring floor concrete, etc., for leveling and leveling the surface of poured fresh concrete. Concerning concrete leveling machines for mechanized construction.

BACKGROUND ART (1) Surface leveling of a converted concrete lift during construction of concrete floors in buildings has long been carried out by the cooperation of earthworkers and plasterers.

However, recently, concrete leveling machines have been developed in order to save labor, manpower, and skills in surface leveling work, and some of them have entered the stage of practical use.

(2) For example, the concrete leveling machine described in Japanese Patent Application No. 60-276509 has a swing arm that is approximately triangular in plan view on a chassis with a caterpillar type running section and has a horizontal level of 2gl1! i is possible, and the cantilever set is provided to protrude forward, and the height adjustment f! is provided at the tip of the swing arm. A traversing rail is provided via an r1 mechanism, and a traversing table to which a leveling screw is attached is configured to traverse along the traversing rail.

Problems to be solved by the present invention (I) In the case of the concrete leveling machine mentioned in (2) above, the swing arm protrudes forward to prevent the leveled concrete surface from being trampled and disturbed by the caterpillars. It is characterized by a structure in which a leveling screw is supported by a cantilever set at the tip. Therefore, in order to prevent the chassis from tipping forward, it is necessary to use f of the chassis as a counterweight to the weight of the leveling screw.
There is a problem in that f1ffi must be increased to a certain extent, which makes it very difficult to reduce the weight of the concrete leveling machine.

If the total weight of the concrete leveling machine is large, it is necessary to appropriately reinforce the support of the floor formwork, etc. when pouring concrete for the floor, which is time-consuming and costly. Therefore, reducing the weight of concrete leveling machines has become the most important technical issue.

(m) In addition, the concrete leveling machine described in (2) above also has a leveling screw leveling adjustment mechanism and a height*
**Although it has a structure, its leveling mechanism is
The configuration is only for leveling the cantilever set swing arm that protrudes forward from the chassis, and for this reason,
There was a problem in that there was a problem in that it was difficult to guarantee whether the leveling screw, which was supported by the swing arm and should be leveled, was at the level level, and the leveling accuracy was unreliable.

(IV) The weight reduction of the concrete leveling machine and the horizontal leveling accuracy of the leveling screw described above can be rationally solved by installing it at a position directly below the approximate center of the vehicle chassis (underneath the belly).

However, when the running part is a tire wheel or a caterpillar, the concrete that has been leveled by the leveling screw installed under the underside of the vehicle is trampled and disturbed by the tire wheels or the caterpillar. In other words, tire tracks that push soft concrete to both sides remain as groove-like tracks, and these tracks require the labor of pouring concrete again as a post-work to backfill and finish the tire marks. There was a problem in that the work was not truly mechanized.

Means for Solving the Problems As a means for solving the problems of the above-mentioned prior art, a concrete leveling machine according to the present invention is provided, as preferred embodiments are shown in FIGS. 1 to 7 of the drawings. A traversing rail 11 is installed in the center of a vehicle chassis 1 equipped with wheels 2.3 that run on poured fresh concrete via horizontality adjustment mechanisms 4, 5.6 and height adjustment mechanisms 8. , the leveling element 13 is installed on the rail 11 for traversing so as to be freely traversable.

In addition, as a specific embodiment, wheels 2.
3 is formed into a basket shape with a thin bar that is buried as if cutting into fresh concrete, and the chassis 1 is supported by a four-wheel system with two front wheels 2 and two rear wheels 3. 3
One or both of these are the driving wheels.

Further, at least three horizontality adjustment mechanisms 4.5, 6 are provided, one at each vertex of a substantially equilateral triangle when the chassis 1 is viewed from above, and these horizontality adjustment mechanisms 4.5.6
The leveling member 7 is supported by the leveling member 7.
The height adjustment member 9 is supported by a height vA node mechanism 8 installed on the leveling member 7 below, and the height adjustment member 9 is moved up and down in parallel with the leveling member 7, A traverse rail 11 of a predetermined length is provided on the height raising member 9.

The wheel 2.3 consists of two rings 16.16 arranged at predetermined intervals, joined in the axle direction by connecting rods 17 arranged at a fixed pitch in the circumferential direction, and each ring 1
6.16 and the hub 18 at the center are connected by spokes 19... to form a basket shape.

Function This concrete leveling machine has a leveling element 13 such as a screw installed under the central part (below the belly) of the chassis 1, so it has extremely high stability against overturning. It is possible to reduce the weight by having only the minimum necessary strength and rigidity.

Further, when the horizontal level of the leveling member 7 is adjusted by the leveling adjustment mechanisms 4 to 6, the leveling of the traversing rail 11 is changed, and the leveling element 1 such as a screw installed on the traversing table 12 is also adjusted.
The result is equivalent to directly adjusting the horizontality level of 3. Therefore, horizontal level accuracy is highly guaranteed, and concrete leveling work with high horizontal level accuracy can be performed.

Example Next, the illustrated embodiment will be explained.

In the concrete leveling machine shown in Figures 1 to 3,
In the figure, reference numeral 1 denotes a chassis, which is supported in a four-wheeled manner by two front wheels 2.2 and two rear wheels 3.3. The chassis 1 has a lightweight skeleton structure made of square pipe materials and the like using the minimum necessary number of members.

The wheels 2.3 are attached to the four corners of the chassis l, which has a substantially rectangular shape when viewed from above, by vertical struts 25 (FIG. 4). The front wheels 2.2 are configured as drive wheels and are each associated with a drive motor 22.

The details of the structure of the wheel 2 or 3 are as shown in Fig. 4, in which two rings 16 and 16 made of round pipes as thin as those cut through concrete are arranged parallel to each other, and these rings are arranged parallel to each other in the axle direction. Moreover, they are integrally welded together using a large number of connecting rods 17 equally distributed in the circumferential direction. Also,
Each ring 16.degree. 16 and the hub 18 at the center are integrally joined by rod-shaped spokes 19, thereby forming a cage-like structure as a whole.

Therefore, these wheels 2.3 are buried in the ready-mixed concrete placed on the floor plastic frame, etc., as if cutting, and do not push the concrete away. The traces of the wheels 2, 3- after they have passed are naturally backfilled due to the fluidity of the concrete, and no artificial modification is required.

In the case of the drive wheel 2 shown in FIG. 4, the hollow cylindrical axle 28, which is fixed to the lower end of the yoke 21 and is integrated with the hub 18, is connected to the ball bearing by the motor case 26 and reducer case 27. It is rotatably supported through. Insert the drive motor 22 into the motor case 26 with bolts 29.
The drive shaft 22a of the drive motor 22 is connected to a reducer 31 installed in the reducer case 27 on the opposite side, and the output shaft of the reducer 31 is connected to the axle 28, thereby connecting the axle. The rotation is transmitted to 28.

Further, the reducer case 27 includes a rotary encoder 30.
is installed, and the rotation speed and rotation angle of the drive shaft 22a are automatically measured by an encoder 30. Note that as the drive motor 22, a motor with an electromagnetic brake is used.

Therefore, when the two front wheels (drive wheels) 2.2 are controlled synchronously with each drive motor 22, the concrete leveling machine moves straight. At this time, the rotary encoder 30 measures the rotation speed and rotation angle of the wheel 2 and calculates the distance traveled.
Running pressure during automatic operation! This enables the a setting.

A support column 25 provided vertically at the center of the upper surface of the yoke 21 is rotatably supported by a cylindrical bracket 32 of the chassis l.

The steering motor 20 is configured to allow remote control to change the direction of the wheels 2 via the support 25.

A stepping motor is used as the steering motor 20. Based on pulse signals sent through the stepping driver, the two left and right motors 20.20 are always synchronously controlled, and for example, by rotating the front wheel 2.2 by a predetermined rotation angle, the trajectory of the concrete leveling machine can be corrected or the direction changed. This makes remote control or automatic operation control possible.

Incidentally, in the case of the rear wheel 3, neither a drive motor nor a rotary encoder is required, so although detailed illustrations are omitted, a bearing is provided directly at the lower end of the yoke 21, making both ends of the axle 28 rotatable. It is said to have a supported structure. The vertical strut 25 is also rotatably supported by a cylindrical bracket 32 of the chassis l. However, pillar 2
5 is configured to fix the direction of the rear wheel 3 by inserting an insert pin or the like.

Next, in the center of the front wheels 2 and rear wheels 3 in the chassis L, there is one leveling adjustment unit each at a position where the arrangement as seen in plan is at each apex of a substantially equilateral triangle as shown in Fig. 1. mechanism 4,
5.6, a total of 3 units (however, the number of bases is not limited) is installed,
As a result, the leveling member 7 is supported substantially horizontally on the underside of the vehicle chassis l.

The details of the structure of the horizontality adjustment mechanism 4 are as shown in FIG. 5, in which a reducer and a servo motor 41 are assembled on the upper side of the main frame 40, and a ball screw type feed screw shaft 42 is connected downward to the output shaft thereof. ing. On the other hand, a guide cylinder 43 is assembled to the lower side of the main frame 40. Inside this guide cylinder 43, there is a slider 44 that is slidable in the axial direction on its inner peripheral surface.
A linear shaft 45 having a linear motion axis 45 is provided in a concentric arrangement. The feed screw shaft 42 is screwed into a parent nut 46 that is integrally formed with the linear motion shaft 45 via a ball. A mounting bolt 47 provided at the lower end of the direct-acting shaft 45 is coupled to a predetermined position of the leveling member 7 as shown in FIG. The other horizontality adjustment mechanisms 5.6 also have similar configurations.

Each horizontality adjustment mechanism 4.5, 6 is attached to a main frame 40 on a bracket 33 provided on the chassis 1, for example, as shown in FIG.
is supported by a pin 34 in the form of a trunnion.

Therefore, when the servo motor 41 is rotated by a predetermined number of rotations or rotation angle in the forward or reverse direction through the servo driver, the linear motion shaft 45 is rotated at a predetermined speed due to the screw movement between the feed screw shaft 42 and the parent nut 46. Stretched downwards or contracted upwards by a distance.

Therefore, the servo motors of the three leveling adjustment mechanisms 4.5.6 should be automatically controlled based on the measured values of a triaxial inclinometer (not shown) installed on the leveling member 7, etc. Therefore, the leveling of the leveling member 7 can be automatically, accurately and quickly obtained.

When viewed from above, the leveling member 7 is configured as a substantially rectangular frame (FIG. 1) that is elongated in a direction perpendicular to the longitudinal direction of the vehicle chassis l. Immediately below this leveling member 7,
Heightening members 9 are arranged in parallel.

The heightening member 9 is also configured as a framework. A guide pin 1O provided vertically upward on the outer side of the long side of the height adjustment member 9 is passed through the guide member 35 provided at the corresponding position of the leveling member 7, so that the height adjustment member 9 is connected to the leveling member 7. On the other hand, they are combined in a relationship where they move up and down as parallel movement.

Therefore, as described above, the horizontal modulation tM mechanism 4.5
．． When the leveling level of the leveling member 7 is adjusted to 7A by 6, this immediately means that the leveling level of the leveling member 9 has been adjusted.

The height adjustment mechanism 8 is fixed to the leveling member 7 and installed vertically downward, and its output shaft 8a is coupled to the heighting member 9 with a pin 36. The configuration of the height adjustment mechanism 8 is also
It has almost the same configuration as the horizontality adjustment mechanism 4 shown in the figure, and the servo motor 3 is driven by a servo driver.
7 (Fig. 6), the output shaft 8a is expanded and contracted, and the height adjustment member 9
The height position of is adjusted.

In short, the height adjustment member 9 has the horizontal adjustment mechanism 4.5.
6, the height position of the height adjustment member 9 can be determined after properly adjusting the horizontality level of the leveling member 7.
Extremely high leveling and height adjustment accuracy is guaranteed.

The height position of the height adjustment member 9 can be adjusted using the same height adjustment member 9.
Standard level laser beam 3 with target 39 set up above
8 and automatically measures the height level error (
(Fig. 2), the measured value is input to the servo driver, and the servo motor 37 is automatically controlled.

As shown in FIGS. 6 and 7, the underside of the height member 9, especially the underside of both side frames 9a and 9a (FIG. 7), is provided with a chassis 1.
Two wooden transverse rails 11.
11 are provided in parallel.

Below the above-mentioned traverse rail 11.11, the traverse rail 1
A slider 12a having a biting groove approximately the same cross-sectional shape as 1.
, 12a, the transverse platform 12 or the same rail 11.11
It is suspended so that it can move freely along the road.

The transverse table 12 is formed into a substantially T-shape when viewed from the front in FIG. 6. A leveling screw 13 serving as a leveling element is horizontally and rotatably installed at the lower end of the vertical downward leg portion 12b corresponding to the Ti11 portion via a bearing 50.50.

The leveling screw 13 is connected to a drive motor 14 installed on the traversing table 12 through a chino 51, and is driven to rotate. The drive motor 14 is a three-phase AC geared motor with a speed reducer, and the leveling screw 13 is driven to rotate at a rotation speed matched to the properties of the concrete. In order to improve the finish of the concrete surface leveling work, the rotation speed of the leveling screw 13 is increased.

Next, a drive motor 52 (FIG. 6) for moving the transverse table 12 along the rail 11 is mounted on the transverse table 12. A pinion 5 rotationally driven by this motor 5a
2a or the rack 5 attached parallel to the traversing rail 11
3 and 11 (FIG. 7), the drive motor 52 is a geared motor with an electromagnetic brake and a speed reducer.

In this way, the leveling screw 13 is traversed together with the traversing table 12 to the limit of the length of the traversing rail 11 mentioned above (see FIG. 1), and the limit position of the movement stroke of the traversing table 12 is detected by a limit switch. Stopping and reverse operation of the drive motor 52 are automatically controlled. The surface of the poured concrete is leveled in units of the range in which the leveling screw 13 moves.

The concrete leveling machine having the above configuration is equipped with an automatic control 5154 at the position indicated by the dotted line in FIG. 2, and is operated in either automatic operation or manual operation by switching the mode.

Regardless of which method is used, the concrete leveling work at the site is carried out by moving the chassis l straight forward in steps equivalent to the length of the leveling screw 13, and at each stop position, the leveling screw 13 is rotated. This is carried out by repeating the procedure of moving the object along the traversing rail 11. However, depending on the leveling finish, the running speed of chassis 1 may vary.

A construction method in which the leveling screw 13 is moved continuously can also be adopted.

The effects of the present invention are as described in detail in conjunction with the embodiments, and the concrete leveling machine according to the present invention can completely level the surface of poured floor concrete, etc. Mechanized construction is possible, saving manpower, labor, and skills in earthwork and plastering.

Above all, this concrete leveling machine is sufficiently lightweight and can be constructed without special reinforcement such as floor formwork.

Furthermore, not only is the machine highly stable and there is no risk of falling accidents, but the height position and horizontality of the leveling screw 13 are highly accurate, making highly accurate concrete leveling work and leveling efficient and inexpensive. You can do what you want.

[Brief explanation of the drawing]

1 to 3 are a plan view, a front view, and a side view of a concrete leveling machine according to the present invention. FIG. 4 is a sectional view showing details of the structure of the drive wheel. Fig. 5 is a sectional view showing the details of the structure of the leveling adjustment mechanism, Fig. 6 is a side view showing the structural parts from the leveling adjustment mechanism to the leveling screw in detail, and Fig. 7 is the front view of the same. It is a diagram. Figure 4

Claims (1)

[Scope of Claims] [1] Wheels running on poured fresh concrete (2)
) (3) A traversing rail (11) is installed in the center of the chassis (1) with the horizontal adjustment mechanism (4), (5), (6) and height adjustment mechanism (8), The traverse rail (11
) A leveling machine for concrete, characterized in that a leveling element (13) is installed in a horizontally movable manner. [2] The wheels supporting the chassis (1) described in claim 1 are formed into a basket shape by thin rods that are cut into ready-mixed concrete and are embedded in the front wheel (2) and the rear wheel (
3) supports the chassis (1) with two four-wheeled wheels each, and one or both of the front wheels (2) and the rear wheels (3) are used as driving wheels. machine. [3] The horizontality adjustment mechanisms (4), (5), and (6) described in claim 1 are provided at each vertex position of a substantially equilateral triangle when the chassis (1) is viewed from above. A total of at least 3 units are provided, and these leveling adjustment mechanisms (4) (5) (6)
The leveling member (7) is supported by the leveling member (7), and the height adjustment mechanism (8) installed under the leveling member (7) supports the leveling member (9). Seshime,
The heightening member (9) shall move up and down in parallel with the leveling member (7), and the heightening member (9) shall be provided with a traverse rail (11) of a predetermined length. Concrete leveling machine with special features. [4] The wheels (2) and (3) described in claim 1 or 2 have two rings (16) and (16) arranged concentrically at a predetermined interval in a circumferential direction. are connected in the axle direction with connecting rods (17) arranged at a constant pitch, and each ring (16) (16) and the hub (18) in the center
A concrete leveling machine characterized by being connected by spokes (19) and formed into a basket shape.