JPH0722189Y2 - Polisher - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a polisher that can be used for cleaning / polishing horizontal walls such as floors and vertical walls.

(Prior Art) Conventionally, the type that is used only for floors is SAIKAI Sho 58
-104171 publication. (Hereinafter, referred to as Conventional Example 1.) Further, a shoulder type using a flexible shaft for facilitating utilization on a vertical surface such as a window glass or a wall is disclosed in Japanese Utility Model Laid-Open No. 56-54050. ing. (Hereinafter, referred to as Conventional Example 2.) In addition, the type using a freely bendable arm is the actual one.
It is disclosed in JP-A-61-14952 and JP-A-62-255398. (Hereinafter, referred to as Conventional Example 3) (Problems to be Solved by the Invention) The above-mentioned Conventional Example 1 is not suitable for cleaning / polishing a vertically oriented wall, and the above-mentioned Conventional Example 2 is a shoulder-mounted type worker. Therefore, it is not suitable for providing a large-sized one because the load on the arm becomes large, and the conventional example 3 has a limit in use in a narrow space even if the operation of the arm is sufficiently smooth.

The present invention is to provide a new polisher that is designed to be used on both horizontal and vertical walls, is designed to be large, and is designed so that it can be easily used even in a narrow space. To aim.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the polisher of the present invention lands on a rear edge of a base plate 2 having a main skirt 1 on the outer periphery when the base plate 2 is tilted in a forward rising state. Support the wheel 3 to
A hand-pushing handle 4 is erected at the rear part of the base plate 2, and a vertical shaft type motor 5 is fixed to a central portion of the upper surface of the base plate 2 with its electric shaft 6 protruding downward, and is attached to the lower end part of the electric shaft 6. A main driving side coupling member 8 having a bayonet receiving portion 7 on its peripheral edge is non-rotatably fixed, and a main driven side coupling member 11 having a bayonet insertion portion 10 on its inner peripheral edge is formed separately from this. Fix the brush body 12 to the main driven side coupling 11,
By coupling the bayonet insertion part 10 and the bayonet receiving part 7, the main driving side coupling member 8 and the main driven side coupling member
A pipe-shaped handle 15 is configured by connecting 11 to attach the brush body 12 to the electric shaft 6 in a detachable manner, and detachably attaching a sub-skirt 14 having substantially the same shape and size as the main skirt 1 described above. Bearings 17, 1 driven shaft 16 in body 15
The driven shaft 16 is rotatably supported via 7 ', and the tip of the driven shaft 16 penetrates into the center of the auxiliary skirt 14, and the protruding end has the same structure as the main driving side coupling 8 described above. The ring 18 is fixed non-rotatably, the tip of the flexible tube 19 is connected to the rear end of the handle 15, and the rear end of the flexible tube 19 is detachably and non-rotatably fixed to the base 2. And the flexible shaft 23 is rotatably inserted into the flexible tube 19 so that the tip of the flexible shaft 23 is non-rotatably connected to the rear end of the driven shaft 16. A rear end of the connecting member 21 extends through the rear end 23, and a bayonet insertion portion 22 having the same configuration as the bayonet insertion portion 10 of the main driven side coupling 11 is formed at the extension end.
The sub-driven side coupling 24 having is fixed non-rotatably.

(Embodiment) The embodiment shown in the drawing is composed of a main unit a that can be used for a floor and an attached attachment unit that enables the main unit a to be used for a wall.

Then, the device a has the following configuration.

In other words, the wheel 3 that lands when the platform 2 is tilted to the front-up state is supported by the rear edge of the platform 2 having the main skirt 1 on the outer periphery, and the hand-pushing handle 4 is mounted on the rear portion of the platform 2. The vertical shaft type motor 5 is fixed to the central portion of the upper surface of the base 2 with its electric shaft 6 protruding downward, and a bayonet receiving portion 7 is provided at the outer peripheral edge at the lower end of the electric shaft 6. The main driving side coupling member 8 is non-rotatably fixed, and separately from this, a main driven side coupling member 11 having a bayonet insertion portion 10 on the inner peripheral edge is formed, and a brush is attached to the main driven side coupling 11. body
12 is fixed, the main driving side coupling member 8 and the main driven side coupling member 11 are connected by fitting the bayonet insertion portion 10 and the bayonet receiving portion 7, and the brush body 12 is detachably attached to the electric shaft 6. It is a thing.

Also, the attachment unit has the following configuration.

That is, the driven shaft 16 is borne in the pipe-shaped handle 15 having the auxiliary skirt 14 which has the same shape and size as the main skirt 1 of the above-mentioned device (a) and which can be attached and detached around the tip.
17 and 17 'are rotatably supported, and the tip of the driven shaft 16 penetrates into the center of the sub skirt 14, and the penetrating end has the same construction as the main drive side coupling 8 described above. The ring 18 is fixed to be non-rotatable, the tip of the flexible tube 19 is connected to the rear end of the handle 15, and the rear end of the flexible tube 19 is detachably attached to the base 2 and non-rotatably attached with a thumbscrew. The connecting member 21 of the type that is fixed by 20 is attached, and the flexible shaft 23 is rotatably inserted into the flexible tube 19, and the tip of the flexible shaft 23 is non-rotatably connected to the rear end of the driven shaft 16. Also, the rear end of the flexible tube shaft 23 penetrates into the connecting member 21, and the protruding end has a bayonet insertion portion 22 having the same configuration as the bayonet insertion portion 10 of the main driven side coupling 11. The dish-type sub-driven side coupling 24 is non-rotatably fixed.

Next, the electric circuit of the motor 5 will be described.

The motor 5 is a three-phase 200V motor and receives power from a commercial single-phase 100V power outlet via a single-phase 100V input / three-phase 100V output type single-phase power inverter system.

The single-phase power supply inverter system has a configuration as shown in the block diagram of FIG. 3, which inputs 100V single-phase AC from the R terminal and S terminal, and converts it to DC power of 200V by the voltage doubler rectifier 31. This DC power is smoothed by a smoothing capacitor 32, and the DC power is converted into 200V AC power by an inverter circuit 33 to obtain 200V three-phase AC at u terminal, v terminal, and w terminal. . In the figure (C ₁ ),
(C ₂ ) is a smoothing capacitor for a voltage doubler circuit which is a part of the voltage doubler rectifier 31, (D ₁ ) and (D ₂ ) are also rectifier diodes for a voltage doubler circuit, and (D ₃ ) and (D ₄ ) are the same. This is a flywheel diode for a voltage doubler circuit. (R ₂ ) is a resistance for current detection, (IM) is a three-phase motor rated at 200 V, 34 is a power supply for control circuit, 35 is an overvoltage detection circuit, 36 is an undervoltage circuit, 37 is an overcurrent detection circuit, 38 is a software A start setting circuit, 39 is a manual potentiometer connected between DC voltage + V and ground, 40 is an A / D converter, 41 is a display circuit, 42 is a base drive circuit, and 43 is an abnormal output signal circuit.

FIG. 4 shows the input / output power waveform of the inverter system, and shows how it is converted into a single-phase 100V, 50Hz output.

In the inverter 33, the base drive circuit 42 controls the timing of conduction of the transistor group, which is its switching element, and obtains an approximate sine wave output shown in FIG.
The output voltage and frequency can be controlled as described later.

The control circuit 45 includes an overcurrent detection circuit 35, an undervoltage detection circuit 36,
Each detection signal of the overcurrent detection circuit 37, the soft start setting signal from the soft start setting circuit 38, and the A / D converter 4
It receives a speed setting signal from 0 and performs a predetermined calculation to give a control signal to the base drive circuit 42, which is composed of a general-purpose microprocessor (CPU), ROM, RAM, an interface and the like.

The control circuit power supply 34 supplies a predetermined DC voltage to the control circuit 45. As shown in FIG. 5, the DC voltage of both terminals (between the P and N terminals) of the capacitor 32 is switched by the switching circuit. The pulse waveform is input to 50, a voltage is adjusted via a pulse transformer 51, and a rectifier circuit 52 obtains a DC output of a predetermined voltage.

As shown in the block diagram of FIG. 6, the overvoltage detection circuit 35 compares the DC voltage of both terminals (between the P and N terminals) of the capacitor 32 with a reference value and a comparator 54, and obtains the H level or The L level signal is output via the photocoupler 55. In FIG. 6, the filter 53 is an LPF for removing the ripple component.

Since the undervoltage detection circuit 36 and the overcurrent detection circuit 37 have substantially the same configuration as the overvoltage detection circuit 35, their illustration is omitted.

As shown in FIG. 7, the soft start setting circuit 38 includes four DIP switches 57 and four resistors (58).
-1) to (58-4), and sends preset 4-bit data to the control circuit 45. Regarding the role of this soft start setting circuit 38,
This will be described in the description of the flow chart of the CPU to be described later.

The display circuit 41 includes, for example, a lamp and a drive circuit for the lamp, and informs the user of the abnormal state by blinking the lamp in an abnormal situation such as an increase in the load on the motor (IM).

The base drive circuit 42 controls the timing by performing on-off control of the power transistor in the inverter 33 based on the calculation result from the control circuit 45, and may have a conventional general base drive circuit configuration. it can.

FIG. 8 is a flowchart showing the processing flow of the CPU, which is a main component of the control circuit 45. As is clear from the figure, when there is an abnormality in any of the detection signals from the circuits 35 to 37, a signal is sent to the display circuit 41 to notify the user of the abnormal state by blinking a lamp or the like. .

If there is no such abnormal state, the soft start setting circuit 38
4 bits of data are fetched and the ROM address in the control circuit 45 is designated by these 4 bits. Corresponding data is read from ROM. This data is for motor (I
The frequency and voltage of the three-phase power to be given to M) are determined, and the inverter 33 is controlled via the base drive circuit 42.

The next step is to determine whether or not a predetermined time has passed after the power switch (not shown) was turned on. That is, after the power switch is turned on, the voltage (v) and the frequency (f) of the three-phase output applied to the motor (IM) are controlled based on the data read from the ROM for a predetermined time during which the starting current flows. Therefore, during this period, the starting current is controlled regardless of the speed set by the manual potentiometer 39.

FIG. 9 is a graph showing the relationship between the voltage (v) and the frequency (f) of the output power of the inverter 33 at the time of startup in the soft start control. Although five types of curves are shown in the figure, one of them is selected in advance by setting the dip switch 57 shown in FIG. As is clear from the figure, the frequency can be changed from Hz to 120 Hz, and the voltage can be changed from several ten volts to the rated voltage.

Returning to the flow chart of FIG. 8, after the above-described predetermined time has elapsed, the base drive circuit 42 is controlled and the inverter 33 is controlled as in the conventional case in order to obtain the motor rotation speed set by the potentiometer 39.

After all, the three-phase 200V motor has better efficiency and power factor than the single-phase motor, less magnetic vibration, less start shock,
The starting current is small, the motor size is small, and variable speed is also possible. The present invention uses this.

(Operation) For example, it is used as follows.

When cleaning the floor surface 25, as shown in FIG.
The brush body 12 is directly attached to and used.

When cleaning the vertical wall surface 26, the attachment shaft is connected to the electric shaft 6 and the brush body 12 is attached to the tip of the attachment shaft as shown in FIG.
In this case, as shown in FIG. 2, the machine a is laid down on the floor or the like.

(Effect of the Invention) As described above, the polisher according to the present invention bears the wheel 3 which lands on the rear edge of the base 2 having the main skirt 1 on the outer periphery when the base 2 is tilted forward. Then, the hand-pushing handle 4 is erected on the rear part of the base 2, and the vertical shaft type motor 5 is fixed to the central portion of the upper surface of the base 2 with its electric shaft 6 protruding downward. A main driving side coupling member 8 having a bayonet receiving portion 7 on the outer peripheral edge at the lower end thereof is non-rotatably fixed and a bayonet insertion portion 10 is provided on the inner peripheral edge separately from the main driven side coupling member. 11, the brush body 12 is fixed to the main driven side coupling 11, and the main driving side coupling member 8 and the main driven side coupling member 11 are fitted by fitting the bayonet insertion part 10 and the bayonet receiving part 7.
And the brush body 12 is detachably attached to the electric shaft 6,
Further, a pipe-shaped handle 15 having a sub-skirt 14 of substantially the same shape and size as that of the main skirt 1 is detachably attached, and a driven shaft 16 in the pipe-shaped handle 15 is loosened by bearings 17 and 17 '. The driven shaft 16 is rotatably supported, and the tip of the driven shaft 16 penetrates through the center of the auxiliary skirt 14, and the auxiliary driving side coupling having the same structure as the main driving side coupling 8 is formed at the protruding end.
18 is fixed non-rotatably, the tip of the flexible tube 19 is connected to the rear end of the handle 15, and the rear end of the flexible tube 19 is fixed to the base 2 in a detachable and non-rotatable manner. A flexible shaft (23) is rotatably inserted into a flexible tube (19) while a connecting member (21) is attached, and a tip of the flexible shaft (23) is non-rotatably connected to a rear end of a driven shaft (16), and a flexible tube shaft (23). A sub driven side coupling 24 having a bayonet insertion portion 22 having the same structure as the bayonet insertion portion 10 of the main driven side coupling 11 is provided at the protruding end while penetrating the rear end thereof into the connecting member 21. Since it is fixed so that it cannot rotate, it can be used on any horizontal or vertical wall, and it can be used in a larger size than the shoulder-mounted type and can be easily used in a narrow space.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view showing a state where a floor surface is cleaned by a polisher according to the present invention, FIG. 2 is a sectional view showing a state where a wall surface is cleaned, and FIG. FIG. 4 is a block diagram showing an electric circuit of the polisher of the present invention, FIG. 4 is a waveform diagram for explaining the operation of the block diagram of FIG. 3, FIG. 5 is a block diagram showing the configuration of the control power supply circuit in FIG. FIG. 7 is a block diagram showing the configuration of the overvoltage detection circuit in FIG. 3, FIG. 7 is a block diagram showing the configuration of the soft start setting circuit in FIG. 3, and FIG. 8 is a control circuit in FIG. FIG. 9 is a flow chart showing the operation of the CPU, and FIG. 9 is a pattern diagram showing the relationship between frequency and voltage that can be selected by the soft start setting circuit. B …… This unit, B …… Attachment, 1 …… Main skirt, 2 …… Base plate, 3 …… Wheels, 4 …… Handle, 5 ……
Motor, 6 ... Driving shaft, 7 ... Bayonet receiver, 8 ...
Main driving side coupling member, 10 ... bayonet insertion part,
11 …… Main-driven side coupling member, 12 …… Brush body, 14
...... Main driven side coupling member, 15 ...... Handle, 16 ...... Drive shaft, 17, 17 '... Bearing, 18 ...... Sub drive side coupling, 19 ...... Flexible tube, 20 ...... Thumbscrew , 21 ... Coupling member, 23 ... Flexible shaft, 24 ... Sub-driven side coupling, 31 ...
… Double voltage rectifier circuit, 32 …… Smoothing capacitor, 33 …… Inverter circuit, (C ₄ ) (C ₂ ) …… Smoothing capacitor, (D
₁ ) (D ₂ ) ... Double-wheel circuit flywheel diode, (R ₂ ) ... Current detection resistor, (IM) ... Three-phase induction machine, 34 ... Control circuit power supply, 35 ... Overvoltage detection Circuit, 36
…… Undervoltage detection circuit, 37 …… Overcurrent detection circuit, 38 ……
Soft start setting circuit, 39 ... Manual potentiometer, 40 ... A / D converter, 41 ... Display circuit, 42 ... Base drive circuit, 43 ... Abnormal output signal circuit, 45 ... Control circuit, 50 ... … Switching circuit, 51 …… Pulse transformer, 52 …… Rectifier circuit, 53 …… Filter, 54 …… Comparator,
55 …… Photo coupler, 57 …… DIP switch, (58−
1) to (58-4) ... resistance.

Claims (1)

[Scope of utility model registration request] 1. A wheel 3 which lands on a rear edge of a base plate 2 having a main skirt 1 on its outer periphery when the base plate 2 is tilted forward and upward.
Bearing, and the hand-pushing handle 4 is erected on the rear part of the base 2,
Further, the vertical type motor 5 is fixed to the central portion of the upper surface of the base 2 with the electric shaft 6 thereof protruding downward, and the main drive side cup having the bayonet receiving portion 7 on the outer peripheral edge at the lower end portion of the electric shaft 6. The ring member 8 is non-rotatably fixed, and the main driven side coupling member 11 having the bayonet insertion portion 10 on the inner peripheral edge is formed separately from this, and the brush body 12 is fixed to the main driven side coupling 11. , The main driving side coupling member 8 and the main driven side coupling member 11 are connected to each other by fitting the bayonet insertion portion 10 and the bayonet receiving portion 7, and the brush body 12 is detachably attached to the electric shaft 6. A pipe-shaped handle 15 having a sub-skirt 14 of the same shape and size as the skirt 1 is detachably attached, and a driven shaft 16 in the pipe-shaped handle 15 is freely rotatable through bearings 17 and 17 '. While supporting it, attach the tip of the driven shaft 16 to the auxiliary skirt. A sub driving side coupling 18 having the same structure as the main driving side coupling 8 is non-rotatably fixed to the center of the inside of the penetrating end, and a handle 15
At the rear end of the flexible tube 19, a tip end of the flexible tube 19 is connected, and at the rear end of the flexible tube 19, a connecting member 21 that is detachably and non-rotatably fixed to the base 2 is attached. A flexible shaft (23) is rotatably inserted in the flexible shaft (23) so that the front end of the flexible shaft (23) is non-rotatably connected to the rear end of the driven shaft (16), and the rear end of the flexible tube shaft (23) is connected to the connecting member (21).
A sub driven side coupling 24 having a bayonet insertion portion 22 having the same configuration as the bayonet insertion portion 10 in the main driven side coupling 11 is fixed to the non-rotatable portion while protruding inward. And polisher.