JPS638259B2 - - Google Patents

Description

1. A concrete floor finishing machine, characterized in that it is equipped with an adjustment screw 13 that rotates, thereby adjusting the inclination angle of each of the working blades 2 fixed to the holder.

2. Said adjusting screw 13 rests on said conical upper part of said piston 9 and said working blade 2 is adjusted by adjusting the length of said adjusting screw 13 which projects inwardly from said opening 10'. The floor finishing machine according to claim 1, wherein the inclination angle of each of the inclination angles can be adjusted individually.

[Detailed description of the invention]

The present invention relates to a freshly poured concrete floor finishing machine, in which two or more radial working blades are pivotally connected, the angle of inclination of which can be adjusted with respect to the floor surface by means of an adjustment device. The present invention relates to a concrete floor finishing machine consisting of a rotor having arms arranged in a row.

When freshly poured concrete is finished with this type of rotating floor finishing work blade, the water in the concrete tends to seep onto its surface. This increase in water volume requires a continuous change in the angle of inclination of the winged floor finishing blade relative to the concrete surface. It is therefore desirable to be able to perform such continuous angular changes during operation of a floor finishing machine by the operator of the machine.

Adjustment devices have long been known that allow an operator to change the inclination angle of a floor finishing work blade by operating an operating handle of a floor finishing machine. However, in the past, the components of the conditioning devices that interacted with the wing finishing work blades were often complex.

An object of the present invention is to provide a floor finishing work blade that can adjust the inclination angle with respect to a concrete surface to be finished, and to provide a floor finishing work blade that can adjust the inclination angle of the floor finishing work blade with respect to the concrete surface. The component of the adjusting device that interacts with the finishing working blade comprises a piston surrounded by a guide cylinder rigidly connected to the center of the rotor and capable of adjusting its axial movement therein. By doing so, it is possible to realize a concrete floor finishing machine with a simplified configuration.

Another object of the present invention is to realize an adjustment device that can separately adjust the inclination angle of a plurality of floor finishing work blades with respect to a concrete surface to be finished.

The invention will be described in detail below with reference to the accompanying drawings.

The concrete floor finishing machine shown in Figure 1 is
It includes a rotor 1 with four arms. The rotor is supported on the concrete surface by arms, each of which is provided with a floor-finishing working blade, preferably of wing-like design, the floor-finishing working blades being connected to the respective arm. The arm is pivotally connected to the arm about the longitudinal axis of the arm. A motor 3 is attached to the rotor 1, and this motor 3
Via a gear transmission 4 integrated with the motor, the rotor 1 and its four arms, each of which is provided with a floor-finishing blade 2, are rotated together with its primarily vertical axis of rotation.

A steering rod 5 is pivotally connected to a gear transmission 4 provided integrally with the motor 3, and a handle rod 6 specially designed for this concrete floor finishing machine is attached to the upper end of the steering rod 5. The concrete floor finishing machine is controlled by this steering rod 5.

The angle of inclination of the working blade for floor finishing, which is pivotally connected to the rotor arm, with respect to the concrete surface is determined by the wire 8 connected to the piston 9 located at the center of this concrete floor finishing machine coaxially with the rotation axis of the rotor.
A working blade adjustment knob 7 is connected to the steering wheel via a working blade adjustment knob 7 and is provided at the upper end of the steering rod 5.
Adjusted by. Piston 9 is rotor hub 1
1 by a wire 8 which is completely enclosed in and guided by a guide cylinder 10 and which interconnects said knob 7 and said knob 7 and piston 9. , can be moved axially with respect to the guide cylinder 10. However, the piston 9 is mounted so that it rotates together with the guide cylinder 10 when the cross-shaped rotor is turned by the motor 3. This piston 9
In order to prevent the wire 8 connected to the piston 9 from rotating together with the rotation of the piston 9, the lower end of the wire 8 is mounted on a ball bearing (not shown).
The piston 9 is supported by a bearing inside the piston 9, and is rotatable relative to the piston 9.

Each of the floor finishing working blades 2 of the concrete floor finishing machine consists of a flat, wing-shaped working blade, which working blade 2 extends over a major part of the length of the respective rotor arm and which extends over a large part of the length of the respective rotor arm. Holder 1 pivotally attached to each
It is fixed to 2. Inside each holder 12 there is provided an adjusting screw 13 screwed into the holder at right angles to the pivot axis of the holder, the inner end of which screw 13 passes through the opening 10' into the guide cylinder 10. It projects inward and rests on the upper conical part of the piston 9. When the piston 9 is moved axially by means of the adjusting knob 7 and the wire 8, the adjusting screw 13 is moved, causing the holder 12 with the floor finishing working blade 2 to pivot, thereby causing the floor finishing working blade to The angle between the working surface and the concrete surface can be changed.
What is important here is that all floor finishing working blades have the same angle of inclination, which is achieved by means of the adjusting screw 13. However, by the interaction of the adjusting screw with the conical part of the piston 9, it is also possible to adjust the angle of each floor finishing working blade 2 with respect to the concrete surface separately.
Initial adjustments should preferably be made on a flat surface. Thereby, first loosen the adjusting screw 13 by an amount such that its inner end no longer rests on the piston 9, and in that position the floor finishing working blades are flat against the surface on which they rest.
Adjustment screw 13 is loosened. The adjustment knob 7 is then turned until the wire 8 is no longer under any tension. The adjusting screws are then screwed in until they rest slightly on the conical part of the piston 9, and then the wire 8 is stretched,
All floor finishing working blades 2 are simultaneously adjusted to the desired angle of inclination with respect to the concrete surface.

The adjustment knob 7 in the illustrated example is provided with a rod 14 extending within the upper tubular portion 15 of the steering rod 5. The lower end of the rod 14 is threaded and screwed into the adapter 16.
The adapter 16 can be slid axially inside the tubular portion 15. A wire 8 is fixed to the end of the adapter 16 opposite to the end into which the rod 14 is screwed. When the adjustment knob 7 is turned, the rod 14 rotates and the adapter 16 slides axially inside the tubular section 15. This movement of the adapter 16 causes, via the wire 8 connected thereto, a movement of the piston 9 corresponding to the movement of the adapter 16, thereby causing the floor finishing working blade 2 to pivot via the adjusting screw 13.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a concrete floor finishing machine according to the present invention, and FIG. 2 is a sectional view of a part of the concrete floor finishing machine shown in FIG. 1...Rotor, 2...Work blade for floor finishing, 3...Motor, 4...Gear transmission, 4'...
... Gear housing, 5 ... Steering rod, 6 ... Handle bar, 7 ... Working blade adjustment knob, 8
... wire, 9 ... piston, 10 ... guide cylinder, 10' ... opening, 11 ... rotor hub, 1
2...Holder, 13...Adjustment screw, 14...Rod, 15...Tubular portion at the top of the steering rod, 1
6...Adapter.

Claims (1)

[Scope of Claims] 1. A rotor hub, two or more radially arranged rotor arms mounted on the hub for rotation about an axis of the hub, each of the rotor arms having a longitudinal axis of the arm. A concrete floor comprising: a floor finishing working blade pivotable about a directional axis; a drive device for the rotor hub; and an adjusting device for changing the inclination angle of the floor finishing working blade with respect to the floor surface. In the finishing machine, the adjusting device comprises: a guide cylinder 10 arranged coaxially with the axis of the rotor hub 11 and fixed; the upper part being conical and arranged confined within the guide cylinder and movable axially therealong; The piston 9 has one end rotatably supported inside the piston by a bearing and the other end fixed to an adapter 16 that slides axially inside the tubular portion 15, and movement of the adapter causes the above-mentioned a wire 8 for axially displacing the piston, to which each of said working blades 2, which is arranged pivotably along the longitudinal axis of the rotor arm, is fixed and which extends over a major part of the length of each of said rotor arms; a holder 12 pivotally mounted to each of the rotor arms in an extending manner; The end is the guide cylinder 10
protrudes towards the center of the rotor hub through an opening 10' in the side of the rotor hub, directly engages the upper part of the piston, and in response to axial movement of the piston 9 about the longitudinal axis of the holder 12.