JP2001234631A - Concrete finishing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a concrete finishing machine capable of changing pressure acting on a concrete finishing surface by simple structure and operation. SOLUTION: Each of blades is made of a first flat plate part on the front edge side of the blade and a second flat plate part on the rear edge side, the area of the first flat plate part is made larger than the area of the second flat plate part and the second flat plate part is inclined at a specified angle against the first flat plate apt on a concrete finishing machine having a support plate, a pair of rotor shafts supported free to incline against a vertical axis of the support plate and free to rotate in the opposite direction each other, a plural number of the blades radially arranged from a lower part of the rotor shafts, a blade support means to support the blades free to oscillate around an oscillating axis along the tangential direction of a rotational circle of the blades and free to pivotally move around a pivotally moving axis along the radial direction of the rotational circle of the blades, an X axis oscillating means to incline the rotor shafts in the X direction and a Y axis oscillating means to incline the rotor shafts in the Y direction.

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 leveling cast concrete floor.
In particular, the present invention relates to an improvement in a blade of a non-boarding type autopilot type concrete finishing machine.

[0002]

2. Description of the Related Art As a concrete finishing machine for leveling the floor of cast concrete, a non-boarding type automatic control system and a boarding type manual control system are known. In the non-boarding type autopilot system, the driver operates and works automatically or remotely without boarding. In the boarding type manual steering system, a pilot gets on the board and drives and works by manual operation.

An example of a boarding type manual steering system is disclosed in, for example, JP-A-63-130860. The boarding type manual steering system has a larger size and weight than the non-boarding type automatic steering system. Therefore, the operability is poor and the work process is lengthened. Non-boarding maneuvers do not have such disadvantages. As an example of a non-boarding type autopilot system, for example,
261960, JP-A-5-5357 and JP-A-6
-93729.

[0004] A non-boarding type autopilot type concrete finishing machine has a pair of rotor shafts arranged substantially vertically, and a plurality of blades (referred to as trowels) are radially attached to the lower end thereof. I have. The rotor shafts are arranged on both left and right sides with respect to the traveling direction of the fuselage.

[0005] The airframe is supported on a concrete floor by a plurality of blades, and the two rotor shafts rotate in opposite directions. That is, the blades on the left and right sides rotate in opposite directions, thereby generating thrust perpendicular to the line through which the two rotors pass.

[0006] The rotor shaft is configured to be inclined with respect to the vertical direction. By tilting the rotor shaft, the blade tilts with respect to the horizontal plane, the contact surface between the blade and the concrete finish changes, and the direction of propulsion changes. Thereby, the traveling direction of the aircraft changes. This traveling principle is the same in the boarding type manual steering system.

[0007]

When the concrete finishing surface is leveled by the concrete finishing machine, the pressure applied to the concrete is generated by the weight of the concrete finishing machine. Assuming that the weight of the concrete finishing machine is constant, the pressure is smaller as the area of the blade is larger, and the pressure is larger as the area of the blade is smaller.

In the state where the hardening of the concrete has not progressed immediately after the concrete has been cast, it is better that the pressure applied to the concrete is smaller, and therefore it is better that the area of the blade is larger. However, in the state where the concrete has hardened, the pressure applied to the concrete should be large, and therefore, the area of the blade should be small. That is, it is better to change the pressure applied to the concrete between the initial stage and the final stage of the casting.

In a conventional concrete finishing machine, the following two methods have been used in order to change the pressure applied to concrete in the initial stage and the final stage of casting. In the first method, a weight is attached to the airframe in the final stage to increase the total weight of the airframe and increase the pressure applied to the blade. In the second method, two types of blades having different areas are prepared, and a blade having a large area is used in an initial stage, and a blade having a small area is used in a final stage. The first method has the disadvantage that the weight of the weight substantially increases the total weight of the fuselage, thereby increasing the frictional force between the blade and the concrete surface and requiring a large engine with a large output. There is. The second method is disadvantageous in that it is expensive to prepare a plurality of blades, and it takes a long time to replace the blades.

An object of the present invention is to provide a concrete finishing machine which can change the pressure applied to concrete without using a weight or replacing a blade.

SUMMARY OF THE INVENTION An object of the present invention is to provide a concrete finishing machine capable of simplifying a concrete finishing operation and improving workability as compared with a conventional apparatus.

[0012]

According to the present invention, there is provided a support plate, a pair of rotor shafts supported so as to be tiltable with respect to a vertical axis of the support plate and rotatable in opposite directions to each other; A plurality of blades arranged radially from the lower portion, and a plurality of blades rotatable about a pivot axis along a tangential direction of a rotation circle of the blade and around a pivot axis along a radial direction of the rotation circle of the blade. Concrete finishing having blade support means for pivotally supporting the blade, X-axis swing means for tilting the rotor shaft in the X direction, and Y-axis swing means for tilting the rotor shaft in the Y direction In the machine, each of the blades comprises a first flat plate portion on the leading edge side and a second flat plate portion on the trailing edge side of the blade, and the area of the first flat plate portion is larger than the area of the second flat plate portion. Large and the second flat plate The portion is inclined at a predetermined angle with respect to the first flat plate portion.

In the initial stage where the hardening of the concrete has not progressed, the first flat plate portion having a large area is used, and in the final stage where the hardening of the concrete has progressed, the second flat portion having a small area is used.
Use the flat plate part. Thus, in the initial stage, the pressure applied to the concrete surface is small, and in the final stage, the pressure applied to the concrete surface is increased.

In an embodiment of the present invention, the trailing edge of the blade has two chevron shapes with a central recess, or the trailing edge of the blade has a chevron shape with a convex center.

Further, the first flat plate portion of the blade is rectangular. The blade has a shape symmetrical with respect to an axis of symmetry parallel to the swing axis.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A concrete finishing machine according to the present invention will be described with reference to FIGS. 1, 2, 3 and 4. FIG.
As shown in FIG. 1, the concrete finishing machine of the present embodiment includes a support plate 2 provided on an airframe 1, a motor 3 as a drive source mounted on an upper surface of the support plate, or an engine, a speed reducer 4 with a clutch, and a motor 3. Blade drive mechanism 5 provided on both sides
5a.

Here, X along the support plate 2 as shown in FIG.
Take the axis and the Y axis, and take the Z axis vertically above it. X
The axis is taken along the line connecting the two blade drive mechanisms 5, 5a, and the Y axis is perpendicular to the line connecting the two blade drive mechanisms 5, 5a.

An output shaft of the motor 3 projects substantially vertically below the support plate 2 and is connected to drive shafts 6 and 6a (only the drive shaft 6 is shown) via a transmission mechanism. As shown in FIG. 3, cylindrical members 9, 9a are attached to the lower surface of the support plate 2, and pulleys 8, 8a (only the pulley 8 is shown) ) Is attached. As shown in FIG. 1, the drive shafts 6, 6a and the pulleys 8, 8a are connected via belts 7, 7a, respectively. Note that a transmission mechanism such as a chain or a gear mechanism may be used instead of the belts 7 and 7a.

Referring to FIGS. 1, 2 and 3, the blade driving mechanisms 5, 5a will be described. The two blade drive mechanisms 5 and 5a have substantially the same structure, and only one blade drive mechanism 5 will be described here. Blade drive mechanism 5
Is a rotating shaft 28 disposed in the cylindrical member 9 and a rotating shaft 28.
Disk-shaped base plate 22 provided at the lower end of
And a rotor shaft 26 disposed therein.

A spline is formed on the rotor shaft 26,
The rotating shaft 28 is provided with a corresponding spline groove. Accordingly, the rotor shaft 26 rotates together with the rotation shaft 28, but can move in the axial direction with respect to the rotation shaft 28. A cylindrical swing shaft 38 is arranged so as to cover the rotating shaft 28, and the lower end thereof is swingably supported by the cylindrical member 9 via a spherical bearing 39. The lower end of the swing shaft 38 is a bearing 40
, The upper end of the rotating shaft 28 is rotatably supported.

The rotor 10 is mounted at the lower end of the rotor shaft 26, and a circular groove 11 is provided on the outer periphery thereof. The blades 12a, 12b, 1 are attached to the rotor 10 via a blade tilting mechanism including a mounting member 13 and a blade swinging mechanism.
2c and 12d are radially attached.

The blade tilting mechanism will be described. As shown in FIG. 3, the blade tilt mechanism has an L-shaped mounting member 13 for connecting the rotor 10 to the blades 12a, 12b, 12c, and 12d. Here, 2 of the mounting member 13
Of the two portions, the portion arranged along the radial direction of the rotating circle of the blade is called a long arm, and the portion arranged along the tangential direction of the rotating circle of the blade is called a short arm. The pin 24 of the bearing 23 is mounted on the inner end of the long arm of the mounting member 13. Thus, the mounting member 13 can pivot about a pivot axis through its long arm. Mounting member 1
An arm 25 is attached to the tip of the short arm of the arm 3, and the arm 25 is engaged with the groove 11 of the rotor 10.

As shown in FIG. 1, the upper end of the rotor shaft 26 disposed inside the rotary shaft 28 extends from the rotary shaft 28, and a thrust bearing 41 and an adjusting screw 42 are attached to the distal end thereof. An angle adjusting portion 43 is provided at a tip of the adjusting screw 42, and the angle adjusting portion 43 can be rotated manually or by a motor.

By rotating the angle adjusting section 43, the rotor shaft 26 moves in the axial direction relatively to the rotating shaft 28. The rotor 10 moves vertically relative to the base plate 22. The arm 25 engaged with the groove 11 of the rotor 10 also moves in the vertical direction. Thereby, the short arm of the mounting member 13 is inclined, and the long arm of the mounting member 13 is pivoted around the axis. The blade mounted on the mounting member 13 also pivots and tilts. The change in the angle of inclination of the blade changes the contact surface between the blade and the concrete finished surface, and changes the pressure applied to the concrete finished surface.

Next, the swing mechanism 14 of the blade will be described.
The swing mechanism 14 includes a blade 12a (another blade 12).
b, 12c, and 12d have the same structure, and a description thereof will be omitted. ), A fixed plate 15, which is an angle member having an L-shaped cross section, mounted on the front edge side of the upper surface, and a channel-shaped holding member 16 and a holding member 16 mounted so as to contact the fixed plate 15.
And a bearing 21 for holding the support shaft 17 and a bolt 21 for mounting the rectangular tube portion 19 of the bearing 18 to the mounting member 13.

As shown by the symbol S in FIG.
2a can oscillate around a rotation axis passing through a support shaft 17 extending through a substantially central portion of the holding member 16 and extending in a tangential direction TT of the rotation circle of the blade. The blade and the swing mechanism 14 attached thereto are detachably attached to the attachment member 13. When the blade is worn and needs to be replaced, the worn blade is replaced together with the swing mechanism 14.

The gimbal mechanism 30 will be described with reference to FIGS. 2, 3 and 4. The gimbal mechanism 30 includes the base plate 22
, And a gimbal ring 31 arranged so as to surround the rotation shaft 28. As shown in FIG. 2, the gimbal ring 31 is formed with a pair of holes 36 on both sides in the diameter direction along the X-axis direction.
Shafts 34, 34 are mounted. Similarly, a pair of holes 37, 37 are formed on both sides in the diameter direction along the Y-axis direction, and a pair of gimbal Y-axes 35, 35 are mounted in these holes.

The gimbal mechanism 30 further includes a gimbal X-axis 3
4 and a pair of gimbal X-axis bearings 32a, 32b and a gimbal Y-axis 35 mounted on the lower surface of the pulley 8.
1 mounted on the upper surface of the base plate 22
It has a pair of gimbal Y-axis bearings 33a and 33b.

The rotating shaft 28 and the rotor shaft 26 are supported by the gimbal mechanism 30 so as to be pivotable about a pivot axis passing through the central axis of the gimbal X-axis 34 and about a pivot axis passing through the central axis of the gimbal Y-axis 35. ing.

The X-axis oscillating mechanism 50 and the Y-axis oscillating mechanism 60 of the first oscillating shaft 38 will be described with reference to FIGS. The X-axis oscillating mechanism 50 is connected to an X-axis servomotor 52 mounted on the support plate 2 via a bracket 51 and an output shaft 53 of the servomotor 52 via a toggle-shaped servo lever 54 and a spherical bearing 55. A pair of spherical bearings 57a, 5 that rotatably support the mounted Y-shaped servo link 56 and two ends of the servo link 56 on the swing shaft 38.
7b.

The Y-axis oscillating mechanism 60 has the same structure as the X-axis oscillating mechanism 50, and includes a bracket 61, an X-axis servomotor 62, a servo lever 64, a spherical bearing 65, a servo link 66, a spherical bearing 67, and the like. However, the servo link 66 is I-shaped, and the number of the spherical bearing 67 mounted on the tip of the servo link 66 is one.

The X-axis swinging mechanism 50 swings the rotor shaft 26 and the rotating shaft 28 in the X-axis direction, that is, along the XZ plane, and the Y-axis swinging mechanism 60 shifts the rotor shaft 26 and the rotating shaft 28 to the Y-axis. In the direction, that is, along the YZ plane. That is, the inclination angle of the rotor shaft 26 with respect to the vertical axis changes. Thereby, the contact surface between the blade and the concrete finishing surface changes, and the traveling direction of the aircraft changes.

The X-axis swing mechanism 5 of the second swing shaft 38a
The configuration and operation of the Oa and Y-axis oscillating mechanism 60a are the same as those of the X-axis oscillating mechanism 50 and the Y-axis oscillating mechanism 60 of the first oscillating shaft 38, and a detailed description is omitted. In the case of the boarding-type manual steering system, the swing shaft itself constitutes a control stick, so the operator operates a handle mounted on the swing shaft.

The operation of the concrete finishing machine of this embodiment will be described. When the motor 3 is driven, the rotation is transmitted to the pulley 8 via the belt 7, and the pulley 8 rotates. When the pulley 8 rotates, the rotation is transmitted to the base plate 22 via the gimbal mechanism 30, and the rotation shaft 28 connected to the base plate 22 rotates. When the rotation shaft 28 rotates, the rotation is transmitted to the rotor shaft 26 via the spline, and the rotor 10 connected to the rotor shaft 26 rotates. Rotor 1
When 0 rotates, the four blades 12a, 12b, 12c, and 12d mounted on the rotor 10 rotate.

The first rotor 10 and the second rotor 10
a rotate in opposite directions. That is, the first rotor 10
And the blade mounted on the second rotor 10a rotate in opposite directions. The friction between the blades 10, 10a rotating in opposite directions and the concrete finished surface generates the propulsion force of the fuselage.

The blade of the concrete finishing machine according to the present invention will be described with reference to FIG. As shown,
The upward direction along the rotor shaft 26 is defined as OZ. The blade 12 rotates in the direction indicated by the symbol RV. Blade 1
The tangent direction of the circle drawn by the trajectory 2 is T-T, and the radial direction, that is, the direction along the mounting member 13 is OR. Blade 1
The swing axis 2 is parallel to the tangential direction TT. The swing of the blade 12 is indicated by the symbol S.

The blade 12 of this embodiment has first and second flat plate portions 12- arranged side by side along the tangential direction TT.
1 and 12-2, the first flat plate portion 12-1 is arranged on the leading edge side of the blade, and the second flat plate portion 12-2 is arranged on the trailing edge side of the blade.

The shape of the blade will be described later with reference to FIG. The first flat plate portion 12-1 has a relatively large area, and the second flat plate portion 12-2 has a relatively small area. The second flat plate portion 12-2 is inclined upward by a predetermined angle θ with respect to the first flat plate portion 12-1. That is, the blade is formed by bending the second flat plate portion 12-2 from the first flat plate portion 12-1 (reference M). Broken line 12-
Reference numeral 3 denotes a boundary between the first flat plate portion 12-1 and the second flat plate portion 12-2, and indicates a bending line. The mounting member 13 and the swing mechanism 14 may be mounted on the first flat plate portion 12-1.

The operation of the concrete finishing machine of this embodiment, in particular, the operation of the blade will be described. The first flat plate portion 12-1 of the blade 12 is used in the initial stage where the hardening of the concrete has not progressed, and the second flat plate portion 12-2 of the blade 12 is used in the final stage where the hardening of the concrete has progressed. Is done.

When the first flat plate portion 12-1 of the blade is used, the concrete finishing machine is operated in the same operation as that when using a normal blade as described above. When using the second flat plate portion 12-1 of the blade, the above-described blade tilt mechanism is operated. The angle adjuster 43 is rotated. As a result, the rotor shaft 26 moves axially relative to the rotation shaft 28. The rotor 10 moves up and down together with the rotor shaft 26, the short arm of the mounting member 13 tilts, and the long arm of the mounting member 13 pivots around the axis. The blade mounted on the mounting member 13 also pivots and tilts about the pivot axis in the radial direction of the rotating circle of the blade. When the inclination angle of the blade becomes substantially θ, the first flat plate portion 12-1 inclines at an inclination angle θ with respect to the horizontal plane, and the second flat plate portion 12-2 comes into contact with the concrete finished surface.

Thus, only the second flat plate portion 12-2 comes into contact with the concrete finished surface. As compared with the case where the first flat plate portion 12-1 is used, the contact area with the concrete finished surface is reduced, so that the pressure applied to the concrete finished surface increases.

The angle of inclination of the blade, that is, the angle of inclination of the first flat plate portion 12-1 with respect to the horizontal plane does not necessarily have to be θ. By making the inclination angle smaller or larger than θ, the contact area between the blade and the concrete finished surface becomes smaller than the area of the second flat plate portion 12-2. As a result, the pressure applied to the concrete surface is further increased.

The shape of the blade of the concrete finishing machine according to the present invention will be described with reference to FIG. In the example shown in FIGS. 7A and 7B, the first flat plate portion 12-1 is substantially rectangular. In the example shown in FIG. 7C, the first flat plate portion 12-1 has a substantially rectangular shape, but has a round shape with a corner on the front edge side removed.

In the example of FIG. 7A, the rear edge of the second flat plate portion 12-2 is formed in two chevron shapes having a concave portion at the center.
In the example of FIG. 7B, the rear edge of the second flat plate portion 12-2 is formed in one mountain shape having a convex portion at the center.

Preferably, the blade 12 is in the tangential direction TT
Are symmetrical with respect to the axis of symmetry along, however, asymmetrical shapes are also possible. 1st flat plate part 12-
The inclination angle θ of the second flat plate portion 12-2 with respect to 1 is 5 to 10
Degrees, for example, may be 8 degrees.

Although the embodiments of the present invention have been described in detail, it will be apparent to those skilled in the art that the present invention is not limited to the above-described embodiments and can adopt various other configurations without departing from the spirit of the present invention. It will be easily understood.

[0047]

According to the present invention, in the concrete finishing machine, the contact area with the concrete finished surface can be changed by one blade, so that the pressure applied to the concrete finished surface in the initial stage and the final stage is changed. There are advantages that can be.

According to the present invention, in a concrete finishing machine, there is an advantage that the pressure applied to a concrete finishing surface can be changed between an initial stage and a final stage without using a weight and without changing blades.

According to the present invention, there is an advantage that the pressure applied to the concrete finishing surface can be increased without increasing the horsepower of the engine of the concrete finishing machine.

[Brief description of the drawings]

FIG. 1 is a view schematically showing a concrete finishing machine of the present invention.

FIG. 2 is a view showing a main part of a concrete finishing machine according to the present invention.

FIG. 3 is a view showing details of a blade supporting mechanism and a gimbal mechanism of the concrete finishing machine of the present invention.

FIG. 4 is a sectional view taken along line 4-4 in FIG. 3;

FIG. 5 is a view for explaining an X-axis swing mechanism and a Y-axis swing mechanism of the concrete finishing machine of the present invention.

FIG. 6 is a view schematically showing a blade of the concrete finishing machine of the present invention.

FIG. 7 is a view showing an example of a blade of the concrete finishing machine of the present invention.

[Explanation of symbols]

1 ... body, 2 ... support plate, 3 ... motor, 5, 5a ...
Blade drive mechanism 6 Drive source 7 Belt 8
... pulley, 9, 9a ... cylindrical member, 10, 10a ... rotor, 11 ... cylindrical groove part 12a-12d ... blade,
DESCRIPTION OF SYMBOLS 13 ... Mounting member, 14 ... Oscillating support mechanism, 15 ... Fixing plate, 16 ... Holding member, 17 ... Support shaft, 18 ... Bearing, 19 ... Square tube part, 20 ... Swing angle, 21 ... Bolt, 22 ... Base Plate, 23 ... bearing, 24 ... pin,
25: arm, 26: rotor shaft, 27: bearing,
28, 28a: rotating shaft, 30: gimbal mechanism, 31
... Gimbal ring, 32a, 32b ... Gimbal X-axis bearing, 33a, 33b ... Gimbal Y-axis bearing, 34, 3
5: shaft, 38, 38a: swing shaft, 39: spherical bearing,
40: Bearing, 41: Thrust bearing, 42: Adjusting screw, 50, 50a: X-axis swing mechanism, 52, 52a:
X-axis servo motor, 54, 54a ... servo lever,
56, 56a: servo link, 60, 60a: Y-axis swing mechanism, 62, 62a: Y-axis servo motor, 64,
64a: Servo lever, 66, 66a: Servo link

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Yoshihiro Umezawa 2-16-46 Minami Kamata, Ota-ku, Tokyo Inside Tokimec Co., Ltd. (72) Inventor Yukihiko Suzuki 2-16-46 Minami Kamata, Ota-ku, Tokyo No. F-term in Tokimec Co., Ltd. (reference) 2E172 DB07 GB01

Claims (5)

[Claims] 1. A support plate, a pair of rotor shafts supported so as to be tiltable with respect to a vertical axis of the support plate and rotatable in opposite directions, and arranged radially from a lower portion of the rotor shaft. A plurality of blades, and the blade is supported so as to be able to swing around a swing axis along a tangential direction of a rotating circle of the blade and to be able to pivot around a pivot axis along a radial direction of the rotating circle of the blade. Blade supporting means, X-axis swing means for tilting the rotor shaft in the X direction, and Y-axis swing means for tilting the rotor axis in the Y direction, a concrete finishing machine, wherein each of the blades The blade comprises a first flat plate portion on the leading edge side and a second flat plate portion on the trailing edge side, the area of the first flat plate portion is larger than the area of the second flat plate portion, and the second flat plate portion is For the first flat plate part Concrete finishing machine, characterized in that it is the angular tilt. 2. The concrete finishing machine according to claim 1, wherein the trailing edge of the blade has two chevron shapes having a recess in the center. 3. The concrete finishing machine according to claim 1, wherein the trailing edge of said blade has a single chevron shape having a convex portion in the center. 4. The concrete finishing machine according to claim 1, wherein said first flat plate portion of said blade is rectangular. 5. The concrete finishing machine according to claim 1, wherein said blade has a shape symmetrical with respect to an axis of symmetry parallel to said swing axis.