JP2936432B2 - Concrete floor finishing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete finishing machine for a concrete casting floor, and more particularly, to a concrete floor finishing machine which can be operated automatically or remotely by a worker without boarding. It is about.

[0002]

2. Description of the Related Art As a conventional concrete floor finishing machine of this type, there is, for example, a cast concrete floor finishing machine disclosed in Japanese Patent Application Laid-Open No. 63-130860. This casting concrete floor finishing machine has a plurality of rotors in which a plurality of blades are equally and radially arranged, an airframe configured for a driver to board, and an engine mounted on a frame of the airframe. And a power transmission mechanism for transmitting power from the engine to each rotor, and two control rods for operating the rotor. The rotor shaft of each rotor is connected to a gear box so that the rotor shaft can be freely tilted at an appropriate angle with respect to the vertical axis, and the two control rods are respectively connected to the gear box via link mechanisms having universal joints. It is connected so that the control shaft can incline the rotor shaft in an arbitrary direction.

[0003] In the casting concrete floor finishing machine constructed as described above, a driver on the body operates two control rods, and a rotor is connected via a link mechanism and a gear box connected to the control rods. Tilt the axis to the desired angle. And the processing surface (concrete casting surface) in the inclination direction
, And the aircraft is moved in the direction opposite to the rotation direction of the blade at the position where the pressure is increased, thereby finishing the floor surface.

[0004] As an apparatus having almost the same function as the above-mentioned concrete floor finishing machine, Japanese Patent Publication No.
There is a riding type surface processing machine disclosed in Japanese Patent No. 44227.

[0005]

All of the above-mentioned conventional concrete floor finishing machines are not only labor intensive, but also require the driver to board and operate.
The work cannot be started while the cast concrete is soft because the weight of the entire apparatus is large, and there is a problem that the work period is prolonged because the work time is prolonged. Also, if the weight of the body is large, the load may exceed the rated load per unit area of the building, and in this case, it cannot be used. Furthermore, there are various problems such as difficulty in operation, which requires a long period (about one year) for driver training.

There is also a concrete floor finishing machine in which a driver does not board, the control stick is a steering wheel having substantially the same configuration as the above-mentioned device, and a worker performs a finishing work on a floor surface while pushing an airframe. In this case, too, manual operation is required, and there is a problem that footprints remain on the upper floor, which is not preferable. Furthermore, the conventional concrete floor finishing machine has a problem that the structure is complicated and manufacturing is difficult because the link mechanism is used.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a concrete floor finishing machine capable of performing a concrete floor finishing operation automatically or remotely without a driver boarding. It is what it was.

[0008]

SUMMARY OF THE INVENTION A concrete floor finishing machine according to the present invention is fixed to a support plate and a rotating shaft on which a plurality of blades are radially and rotatably mounted and tiltably supported with respect to the support plate. Rotor, a first drive unit and a first power transmission mechanism arranged on a support plate for rotating the rotation shaft of the rotor, a second drive unit for moving the rotation shaft of the rotor up and down, and a second drive unit. And a third drive unit for inclining the rotation shaft of the rotor and a drive unit including the third power transmission mechanism.

Further, the above-mentioned concrete floor finishing machine is provided with turning angle detecting means and running distance detecting means.

Further, the first power transmission mechanism has a ring rotatable about a horizontal axis with respect to the rotation axis of the rotor, and a second ring rotatable about a horizontal axis perpendicular to the horizontal axis with respect to the ring. It includes a ring and a connecting portion that connects the first driving unit and the second ring.

Furthermore, the second power transmission mechanism is provided with a second power transmission mechanism.
And a movable member rotatably connected to the rotation shaft of the rotor and screwed to the screw shaft to move up and down.

Further, the third power transmission mechanism includes a weight or an XY stage rotatable about a rotation axis of the rotor and slidable in a direction perpendicular to the rotation axis of the rotor.

[0013]

The first drive unit and the first power transmission mechanism rotate the rotors in opposite directions, and the concrete floor is scraped and finished by the blades attached thereto. In addition, the pressure of the blade against the concrete floor is adjusted by moving the rotation axis of the rotor up and down by the second drive unit and the second power transmission mechanism to change the inclination angle of the blade. Further, the rotation axis of the rotor is inclined by the third drive unit and the third power transmission mechanism, and the pressure of the specific blade against the concrete floor is increased to move the airframe. These operations are controlled by controlling each drive unit.
It can be performed automatically or remotely by unattended operation.

[0014]

FIG. 1 is a perspective view showing an embodiment of a concrete floor finishing machine according to the present invention. In the figure, 1 is a body, 2 is a support plate, 3 is a motor which is a drive source mounted on the upper surface of the support plate 2, and 5 and 5a are blade drive mechanisms provided on both sides of the motor 3. The output shaft of the motor 3 projects substantially vertically from the lower surface of the support plate 2 and is connected to the drive shafts 6 and 6a via a transmission mechanism.
Are connected to outer rings 8, 8a of blade driving mechanisms 5, 5a located below the support plate 2 via two belts 7, respectively. Two grooves 9 are formed in the outer ring 8, and the belt 7 is fitted into these grooves. Since the blade driving mechanisms 5 and 5a have substantially the same structure, the blade driving mechanism 5 will be mainly described below.

FIG. 2 is a perspective sectional view showing the internal structure of the outer ring 8 and its periphery. Reference numeral 10 denotes a rotor disposed below, which is provided with three receiving ports 11 (only one receiving port is shown in the drawing), and one end of an arm 12 is rotatably fitted into the receiving port 11. . The other end of the arm 12 is attached to the base of an L-shaped fixture 14 of the blade 13, and the end of the L-shaped fixture 14 is inclined with a bottom surface 20 of an inner ring 19 described later via a pitch link 15. It is connected as possible. A rotor shaft 16 having a spline formed on the outer peripheral surface is integrally attached to the rotor 10.

A middle ring 17 is supported inside the outer ring 8 via a bearing (not shown) so as to be rotatable around the y-axis (in FIG. 2) with respect to the outer ring 8 (in FIG. 2). The inner ring 19 is supported so as to be rotatable around the x-axis (in FIG. 2) with respect to the middle ring 17 via the. Thus, the outer ring 8 and the middle ring 1
7 and inner ring 19 form a gimbal structure, and inner ring 1
Regardless of the inclination of 9, the outer ring 8 can maintain a horizontal state. The inner ring 19 includes an outer cylinder 21 and an inner cylinder 22 arranged concentrically, and a bottom surface 20. The inner cylinder 22 forms a spline nut that fits with a spline of the rotor shaft 16. The outside of the inner cylinder 22 is supported by a cylindrical body 25 via bearings 23 and 24, and the lower part of the cylindrical body 25 is supported by a support 27 via a spherical bearing 26 so as to be tiltable. The support 27 includes a flange portion 28 and a cylindrical portion 29. The flange portion 28 is fixed to the support plate 2, and the cylindrical portion 29 protrudes into a space formed by the outer cylinder 21 and the inner cylinder 22. The tube 25 is supported. Also,
A bellows 30 is provided between the outer edge of the flange portion 28 and the peripheral wall of the cylindrical body 25. A motor 31 is provided on the upper part of the cylindrical body 25 and rotates an output shaft 32 extending in the longitudinal direction inside the cylindrical body 25. In addition, 40 in FIG. 1 is a movement control unit provided on the upper part of the cylindrical body 25.

FIG. 3 shows an upper cross section of the cylindrical body 25. The distal end of the output shaft 32 of the motor 31 becomes a screw portion 33, and a male screw is formed. One end of a nut portion 34 is screwed to this male screw, and the other end of the nut portion 34 is rotatably supported by a rotor 16 via a bearing 35. A spline is formed on the outer peripheral surface of the nut portion 34, and is fitted with a spline nut formed on the inner peripheral surface of the cylindrical body 25.

Next, FIG. 4 shows the internal structure of the movement control unit 40 rotatably fixed to the cylindrical body 25 above the cylindrical body 25. A U-shaped weight 42 is slidably mounted on a movement control plate 41 having a center hole through which the cylindrical body 25 is inserted. Thick portions 43 and 43a are formed at both ends. A screw hole is formed in one of the thick portions 43, and the screw rod mounting portion 4 fixed to the movement control plate 41 is formed.
4 and 44a, and is screwed to a screw rod 45 rotatably supported between the motor rod 47 and a motor 47 via a belt 46.
Output shaft. Also, the other thick portion 43a
Has a hole penetrating therethrough, and is slidably fitted to a shaft 45a fixed between mounting portions 44a fixed to the movement control plate 41. The lower surface of the movement control plate 41 is shown in FIG.
As shown in the figure, a disc-shaped gear 48 is provided rotatably with respect to the cylindrical body 25 via a bearing 49,
And an output gear 51 fixed to an output shaft of a motor 50 fixed to the motor.

In the above configuration, when the motor 3 is driven, the drive shaft 6 and the belt 7 connected to the output shaft are driven.
The rotation is transmitted to the outer ring 8 through the inner ring 17, and further the rotor shaft 16 is rotated through the middle ring 17 and the inner ring 19. Rotor shaft 1
With the rotation of 6, the rotor 10 and the blade 13 attached thereto are also rotated to scrape and finish the concrete floor (working surface). The other rotor shaft 16a rotates in the same manner, but the direction of rotation is opposite to that of the rotor shaft 16.

In this case, when the concrete is soft, if the pressure of the blades 13 and 13a on the processing surface is too high, the processing surface will be roughened, and it is necessary to reduce the pressure. In addition, when the concrete gradually hardens, it is necessary to increase the pressure because a very low pressure has no effect. Thus, the pressure of the blades 13 and 13a on the processing surface must be adjusted according to the conditions of the processing surface and the like. For this purpose, the motor 31 is driven and the screw 33 is rotated. Since the outer peripheral surface of the nut portion 34 screwed to the screw portion 33 is spline-fitted to the cylindrical body 25, the nut portion 34 moves up and down according to the rotation of the screw portion 33, and thus is supported by the screw portion 33. The rotor shaft 16 and the rotor 10 fixed thereto are moved up and down. On the other hand, since the height of the inner ring 19 does not change, the inclination angle of the arm 12 and the blade 13 changes via the pitch link 15, and the pressure of the blades 13 and 13a against the processing surface can be adjusted.

Next, the operation when the body 1 is moved will be described. First, the principle of movement of the body 1 will be described with reference to FIG. In FIG. 6, 13 and 13a are 2
The blades of the pair of rotors 10 and 10a, 80 and 80a indicate portions where the pressure applied to the blades 13 and 13a is large, the broken arrow indicates the direction of the reaction force, and the solid arrow indicates the direction of movement of the body 1. I do. When the rotors 10 and 10a rotate in directions opposite to each other, if the pressure on the processing surfaces of the blades 13 and 13a on the inner side is increased more than the pressures of the other blades 13 and 13a, as shown in FIG. The body 1 moves in a direction (for example, a forward direction) opposite to the rotation direction of the blades 13 and 13a at the position where the pressure is increased. In addition, each of the outer blades 1
The pressure on the working surface of the other blade 13
When the pressure is increased from the pressure of the blades 13 and 13a, as shown in FIG.
Move in the opposite direction (for example, backward direction).

When the body 1 is moved in the left-right direction, for example, as shown in FIG. 6C, if only the pressure on the processing surface of the blade 13 behind the left rotor 10 is increased, the body 1 can be moved. The body 1 can be moved to the left by increasing only the pressure on the processing surface of the blade 13 in front of the left rotor 10 as shown in FIG. 6D, for example.

Further, when the airframe 1 is turned, FIG.
As shown in (e), the pressure on the processing surface of the blade 13 inside one rotor (for example, the left rotor 10) is increased from the pressure of the other blade 13 and the other rotor (for example, the right rotor 10a). When the pressure of the blade 13a on the outside of the body is increased, the body 1 turns clockwise. On the other hand, as shown in FIG. 6 (f), the blade 1
When the pressure of the blade 3a on the inside of the other rotor (for example, the left rotor 10a) is increased while the pressure of the rotor 3 is increased, the body 1 turns counterclockwise. In addition to the above, as shown in FIG. 7, various applied operations can be performed by appropriately selecting the positions of the blades 13 and 13a that increase the pressure applied to the processing surface.

In the present invention, by inclining the rotor shafts 16 and 16a, two sets of rotors 1 are provided as described above.
The pressure of the blade 13 at a specific position among 0 and 10a can be made higher than the pressure of the other blades 13. That is, the motor 50 shown in FIGS. 4 and 5 is driven to rotate the output gear 51 and rotate the movement control plate 41 to a desired angle with respect to the cylindrical body 25 via the gear 48 meshing with the output gear 51. Further, the motor 47 is driven to rotate the screw rod 45 via the belt 46, and the weight 42 screwed to the screw rod 45 is slid in both the far and near directions with respect to the cylindrical body 25.
By moving the entire center of gravity in the xy directions, the cylindrical body 25 and the rotor shaft 16 can be inclined in a desired direction.

For example, as shown in FIG. 6A, the pressure of the blades 13
3a, the motor 50 is driven so that the weight 42 comes to the motor 3 side, and the movement control plate 4
1 and then the motor 47 is driven to
2 is slid outward from the cylindrical body 25. By doing so, the two cylindrical bodies 25, 25a are tilted toward the motor 3 side, and the pressure of the inner blades 13, 13a can be increased. Similarly, when the cylinder 25 is moved in another direction, the cylinder 25 may be inclined in any direction. When the blades 13 and 13a are in the neutral state, the weight 42 is slid in the direction of the cylindrical body 25. further,
When the weight 42 is drawn toward the cylindrical body 25 and then rotated when the movement control plate 41 is rotated, the weight 42 is not affected by the change in the center of gravity during the rotation. In addition, weight 4
The extent to which 2 is slid may be appropriately adjusted according to the situation of the processing surface or the like.

When the cylinder 25 is tilted, the support plate 2
Is connected by the bellows 30, the support plate 2 itself is not particularly affected. Further, since the outer ring 8, the middle ring 17, and the inner ring 19 form a gimbal structure, even if the inner ring 19 is tilted together with the tilt of the rotor shaft 16, the tilt is not transmitted to the outer ring 8, and the outer ring 8 is not tilted. Does not change the positional relationship between the output shafts 6 and 6a, so that the tension of the belt 7 can be kept constant.

Next, a second embodiment of the movement control unit is shown in FIG.
As shown in FIG. A sleeve 55 is slidably connected to the outside of the cylindrical body 25 via a ball bearing 56. Further, the sleeve 55 is connected to an xy stage 60 fixed to the support plate 2 via a spherical bearing 57 provided at one place on the outer periphery. When the motor 61 is driven, the output shaft 58 of the xy stage 60 can be moved in the y-axis direction, and by driving the motor 62, the output shaft 58 can be moved in the x-axis direction.
According to this configuration, the motors 61 and 62 are driven to move the sleeve 55 in the xy plane.
By moving the upper part of the cylinder 25, the cylindrical body 25 can be inclined in an arbitrary direction, and can be operated in the same manner as in the first embodiment.

Next, a third embodiment of the movement control unit will be described with reference to FIG.
0, shown in FIG. In this embodiment, an inner sleeve 6 is used instead of the spherical bearing 57 and the sleeve 55 in the second embodiment.
5. An outer sleeve 66 and a spring 67 are used.
A spring 6 in which an inner sleeve 65 is fixed outside the cylindrical body 25 and an outer sleeve 66 is radially arranged outside the inner sleeve 65.
7, an output shaft 58 of an xy stage 60 fixed to the support plate 2 is connected to one portion of the outer periphery of the outer sleeve 66 in the same manner as in the second embodiment. I have. With this configuration, the outer sleeve 66 can be moved in any direction by driving the motors 61 and 62, and the cylindrical body 25 is moved by the elastic force of the spring 67.
Can be inclined.

As described above, in the present invention, all the work and movement of the concrete floor finishing machine can be performed by controlling the drive source, and these controls can be easily realized by remote control by radio or the like. Can be eliminated. If the concrete floor finishing machine itself has a turning angle detection function and a traveling distance detection function, automatic operation can be performed unattended by setting a traveling area or the like in advance.

The turning angle detecting function can be constituted by an angular velocity sensor and an integrator, but can also be realized by a turning angle detecting section 70 as shown in FIG.
Reference numeral 71 denotes a support portion provided with an angle detector such as a rotary encoder, which is attached to the support plate 2 so as to coincide with the center line of the body 1. An offset shaft 72 is rotatably supported by the support portion 71, and a sensor wheel 73 that is in contact with the processing surface is mounted on the offset shaft 72.

When the body 1 advances in the direction of the arrow in the figure, the sensor wheels 73 travel following the offset shaft 72, and when the body 1 turns, the sensor wheels 73 move with the offset L of the offset shaft 72. The vehicle follows the turning direction. Therefore, the rotation angle of the offset shaft 72 is
This indicates the turning angle of the airframe 1, and this angle is detected by the angle detector.

FIG. 13 is a block diagram of an embodiment of a control device in the case where the concrete floor finishing machine according to the present invention is operated automatically and unattended. Reference numeral 75 denotes a control unit composed of a microcomputer.
1a, 47, 47a, 50, 50a, 61, 61a and 62, 62a. Reference numeral 70 denotes, for example, a turning angle detector described in FIG. 12, and reference numeral 76 denotes a traveling distance detector, which is constituted by, for example, a rotary encoder that measures the traveling distance of the sensor wheel 73 described in FIG. The detection signal of the traveling distance detector 76 is transmitted to the control unit 7.
Added to 5. Reference numeral 77 denotes a traveling area setting device for setting a traveling area in automatic driving.
Added to 5.

In the above-described control device, when the travel area of the concrete floor finishing machine is set in the travel area setting unit 77, the control unit 75 performs, for example, forward, 90 ° right (left) turn, forward, 90 ° left ( Right) Each motor 47, 47a, 50, 5 according to the set sequence, such as turning and moving forward
0a, and the automatic operation can be performed unattended.

[0034]

As is apparent from the above description, the present invention provides a concrete floor finishing operation, a blade pressure adjustment to the concrete floor, and a movement of the airframe by the first to third drive units and the first to third drive units. This is performed by a power transmission mechanism, and the following remarkable effects can be obtained.

(1) Since the driver does not need to board, the weight of the apparatus can be reduced. This allows you to start work while the concrete floor is soft,
Therefore, the construction period can be shortened. In addition, since the weight of the device can be made equal to or less than the allowable load of the building, it can be widely used for various buildings. (2) Since various operations can be remotely controlled by radio,
It is easy to operate and trains workers in just a few hours. (3) When the turning angle detecting means and the traveling distance detecting means are provided, completely automatic operation can be performed. (4) Since a link mechanism is not used, a simple transmission mechanism can be realized.

[Brief description of the drawings]

FIG. 1 is a perspective view of an embodiment of the present invention.

FIG. 2 is a perspective sectional view of a main part of FIG.

FIG. 3 is a longitudinal sectional view of an embodiment of an upper portion of a cylindrical body.

FIG. 4 is a perspective view of an embodiment of a movement control unit.

FIG. 5 is a longitudinal sectional view of FIG. 4 with a part omitted.

FIGS. 6A to 6F are explanatory views for explaining the principle of movement of the body.

FIGS. 7A to 7E are explanatory diagrams for explaining the principle of movement of the body.

FIG. 8 is a perspective view of a second embodiment of the movement control unit.

FIG. 9 is a longitudinal sectional view of a cylindrical portion of FIG. 8;

FIG. 10 is a plan view of a third embodiment of the movement control unit.

FIG. 11 is a side view of FIG. 10;

FIG. 12 is an explanatory diagram of an embodiment of a turning angle detection unit.

FIG. 13 is a block diagram of an embodiment of a control unit.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Body 2 Support plate 3,31,31a, 47,47a, 50,50a, 6
1, 61a, 62, 62a Motor 5, 5a Blade drive mechanism 6, 6a Drive shaft 7 Belt 8, 8a Outer ring 10, 10a Rotor 13, 13a Blade 16 Rotor shaft 17 Middle ring 19 Inner ring 25 Cylindrical body 27 Support 33 Screw Unit 34 nut unit 40, 40a, 40b movement control unit 41 movement control plate 42 weight 60 XY stage 70 turning angle detection unit

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Kenji Akito 2-16-46 Minami Kamata, Ota-ku, Tokyo Inside Tokimec Co., Ltd. (72) Inventor Tetsuya Arimoto 2--16 Minami Kamata, Ota-ku, Tokyo No. 46 Inside Tokimec Co., Ltd. (58) Field surveyed (Int.Cl. ⁶ , DB name) E04G 21/10 E04F 21/16 E04F 21/24

Claims (6)

(57) [Claims] 1. A support plate, a plurality of blades are radially and rotatably mounted, and a plurality of rotors fixed to a rotation shaft supported to be tiltable with respect to the support plate; and a rotation shaft of the rotor. A first drive unit and a first power transmission mechanism arranged on a support plate for rotation, a second drive unit and a second power transmission mechanism for vertically moving a rotation shaft of the rotor, and a first power transmission mechanism. A concrete floor finishing machine comprising: a third drive section for inclining a rotation axis; and drive means including a third power transmission mechanism. 2. The concrete floor finishing machine according to claim 1, further comprising a turning angle detecting means and a traveling distance detecting means. 3. The first power transmission mechanism includes a ring rotatable about a horizontal axis with respect to a rotation axis of a rotor, and a second ring rotatable about a horizontal axis perpendicular to the horizontal axis with respect to the ring. 3. The concrete floor finishing machine according to claim 1, further comprising: a second ring; and a connecting portion connecting the first driving unit and the second ring. 4. 4. A screw shaft rotated by a second drive unit, a movable member rotatably connected to a rotation shaft of a rotor, and a movable member screwed to the screw shaft to move up and down. The concrete floor finishing machine according to claim 1 or 2, comprising: 5. The power transmission mechanism according to claim 1, wherein the third power transmission mechanism includes a weight rotatable about a rotation axis of the rotor and slidable in a direction perpendicular to the rotation axis of the rotor.
The concrete floor finishing machine according to 3 or 4. 6. The concrete floor finishing machine according to claim 1, wherein said third power transmission mechanism is an XY stage.