JP2003039299A - Floor polishing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a floor polishing device which allows slight dust scattered on the floor or dust generating in a polishing process to be sucked and the polished condition (accuracy) of the floor to be enhanced. SOLUTION: The floor polishing device P1 is provided with a polishing brush 2 on the outer rotor R of an outer rotor motor M. A hollow casing 1 of a hollow pipe shape is placed vertically at the center of the motor M, a stator S is fixed outside the hollow casing 1, and the outer rotor R is mounted outside the stator S rotatably through bearings 9. The polishing brush 2 whose center section only corresponding to the outer diameter of the hollow casing 1 is scooped out, is integrated with the outer rotor R as a body being placed horizontally at the bottom of the hollow casing 1, and a suction hose 4 is connected with the hollow casing 1 at the top.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floor surface polishing apparatus used for polishing a flat floor or polishing a wax.

[0002]

2. Description of the Related Art An electric cleaning article used for polishing a flat floor surface F or for polishing a wax, and a floor surface polishing apparatus P'used for a main body thereof has an appearance as shown in FIG. A motor M ′, which is a drive device for the polishing brush 2 ′, is vertically arranged inside the hood 3 ′ by a predetermined method, and operation / stop of the motor M ′ is operated to operate the floor surface. F is polished. The floor polishing device P ′ is roughly divided into a handle 5 ′ attached to itself,
A handle-operated type that is directly operated by an operator, or a trolley-mounted type in which one or two floor polishing devices P'are usually installed side by side on a dolly and the entire device is operated by an operator There is one.

A floor polishing apparatus P'shown is for polishing by operating a handle 5 ', and a disk-shaped polishing brush 2'is attached to an output shaft portion of a rotor at a lower end of a motor M'. Has been done. In order to polish using the floor surface polishing apparatus P ′, cleaning is performed in advance to remove dust on the floor surface F, detergent is sprinkled over the entire surface, and the polishing brush 2 ′ is rotated from above. The floor surface F is polished. Then, at the time of polishing, the residual dust on the floor surface F and the dust generated from the polishing brush 2 ′ itself are caught and entangled between the polishing brushes 2 ′. That is,
When polishing is performed with dusts scattered on the floor surface, the dusts are ground together with the polishing agent and polished, so the floor polishing state (accuracy) deteriorates. Therefore, in the conventional floor surface polishing apparatus P ′, even if the amount of dust scattered on the floor surface is small, it is necessary to perform the polishing work after cleaning the floor surface, which is inefficient. Further, since the work of spraying the cleaning detergent and the work of polishing the floor surface F cannot be performed at the same time, there is a problem that further cleaning time is required.

[0004]

SUMMARY OF THE INVENTION According to the present invention, a slight amount of dust scattered on the floor surface or dust generated during polishing can be sucked to improve the polishing state (accuracy) of the floor surface. The task is to do.

[0005]

In order to solve the above problems, the invention according to claim 1 is a floor polishing apparatus in which a polishing brush is attached to the rotor of an outer rotor motor, and the center of the motor is the center of the motor. , A hollow pipe-shaped casing is vertically arranged, a stator is fixed to the outer side of the casing, and a rotor is rotatably mounted on the outer side of the stator via a bearing to correspond to the outer diameter of the casing. The polishing brush whose central part is cut off by the amount of the above is integrally mounted on the rotor in a state of being horizontally arranged at the lower end of the casing, and a suction hose is connected to the upper end of the casing. Is characterized by.

According to the first aspect of the present invention, the motor for rotating the polishing brush is an outer rotor motor, and a hollow pipe-shaped casing is arranged at the center of the outer rotor motor, and a suction hose is connected to the casing. Therefore, the floor surface can be polished in a state where the suction airflow is applied to the central portion of the rotating brush horizontally arranged at the lower end portion of the casing. Therefore,
Since the floor surface can be polished while suctioning the generated dust,
When there is little dust scattered on the floor surface, it is possible to perform polishing as it is, and the polishing state (accuracy) of the floor surface is also improved (polishing accuracy is increased). The efficiency of cleaning can be improved. Further, with the suction air flow once stopped to reach the center of the polishing brush, an abrasive agent is applied to the center of the polishing brush during polishing via the suction hose and the hollow pipe-shaped casing.
You can supply detergent etc. and most effectively use these abrasives,
Moreover, it can be used economically.

Further, the invention of claim 2 is characterized in that, in the invention of claim 1, a hood covering the whole of the motor and the polishing brush and a handle are integrally attached to the casing. There is.

According to the invention of claim 2, due to the presence of the hood, it is possible to prevent the suction airflow from being dissipated to a portion other than the polishing portion, and at the same time, the polishing brush and the motor are covered up, so that the polishing device is Good appearance. Further, since the casing has a large diameter with respect to the entire polishing apparatus and has mounting rigidity, the handle can be mounted, and the polishing apparatus can be operated easily.

According to a third aspect of the present invention, there is provided a floor polishing apparatus in which a polishing brush is mounted on a rotor of an outer rotor motor, wherein a hollow pipe-shaped casing is vertically arranged at the center of the motor. A polishing brush, in which a stator is fixed to the outside of a casing, a rotor is rotatably attached to the outside of the stator via bearings, and a central portion is cut off by an amount corresponding to the outer diameter of the casing, The rotor is integrally mounted on the rotor in a state of being horizontally arranged at the lower end of the casing, and an inner hood that covers the outside of the entire motor is integrally attached to the upper end of the casing, and a part of the upper end side as a whole. To form a double cylindrical circulation path forming member, and further, an outer hood is arranged outside the inner hood, and a space between the inner and outer hoods, and Space within the casing constitutes a circulation path of the air flow, by said disposed in the middle of the circulation path suction device, is characterized in that it is arranged to emit the airflow into the circulation path.

According to the third aspect of the present invention, the air flow is discharged to the center of the polishing brush through the inside of the casing, and from the lower end of the space between the inner and outer hoods, By sucking the peripheral air flow, it is possible to suck the peripheral dust at the lower end of the space while the air flow circulates in the circulation path. Except for this configuration, the function and effect are almost the same as those of claim 1.

The invention of claim 4 is characterized in that, in the invention of claim 3, a filter for trapping dust contained in the air flow is attached to the opening on the upper end side of the circulation path forming member. I am trying.

According to the invention of claim 4, it is possible to prevent dusts from diffusing into the circulation path of the air flow, so that the finish of cleaning the floor surface can be improved.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a plurality of embodiments will be described,
The floor polishing apparatus according to the present invention will be described in more detail.
It However, from the viewpoint of the suction airflow reaching the floor surface,
And the floor surface polishing apparatus P according to the second embodiment₁, P₂On the floor
Polishing by applying a suction air flow that sucks dust to F
Embodiments for achieving the third and fourth embodiments
Floor polishing machine P₃, P_FourDo not circulate the suction airflow
This is an embodiment for lapping and polishing. Also, the product
From the viewpoint of the business form, the floor surface polishing apparatus of the first embodiment
P ₁Is a handle-operated floor polishing device,
To the floor polishing apparatus P according to the fourth embodiment₂, P₃, P
_FourIs a trolley-mounted floor polishing device.

FIG. 1 is a vertical sectional view of a floor surface polishing apparatus P _{1 according to} a first embodiment of the present invention, and FIGS. 2 and 3 are
Similarly, it is a bottom view and a perspective view of the bottom. Floor polishing device P
Reference numeral ₁ is a device for polishing while removing a dust by applying a suction airflow 16 of a suction blower (not shown) mounted by a predetermined method to a polishing floor surface F. In addition, the floor polishing device P ₁ is provided with a detergent inlet (not shown below) mounted by a predetermined method, and the detergent 17 therein is sprayed on the floor F for polishing. It is also possible device.
As shown in FIG. 1, the floor polishing apparatus P ₁ includes a motor M having an outer rotor structure having a hollow casing 1 in the shape of a hollow pipe, and a rotor of the motor M for rotating and polishing a floor F. A substantially donut-shaped polishing brush 2 mounted on the lower end surface of R horizontally with the floor F; a hood 3 mounted on the upper end of the hollow casing 1 to cover the motor M and the polishing brush 2; It is composed of a suction hose 4 which is also attached in order to connect to the suction blower or the detergent inlet, and a handle 5 which is also attached in order to be gripped and operated by an operator for polishing. There is.

The motor M is a motor in which a portion of the hollow casing 1 is arranged perpendicularly to the floor surface F, and the portion of the hollow casing 1 projects above the motor M by a predetermined length. The hollow casing 1, a stator S concentrically fixed to the outer periphery of the hollow casing 1, and an outer rotor R rotatably supported outside the stator S. The stator S is configured such that the stator core 7 wound with a predetermined winding 6 is supported by the core support 8 fixed to the outer periphery of the hollow casing 1. On the other hand, the outer rotor R is mounted above and below the inner periphery of the outer rotor R via a pair of bearings 9 mounted on the outer periphery of the hollow casing 1 so as to be rotatable about the hollow casing 1 as a fixed axis. . The polishing brush 2 is integrally fixed to the lower end surface of the outer rotor R with a screw (not shown).
At the same time, the outer circumference of the hollow casing 1 can be rotated.

The outer rotor R supports the outer circumference of the stator iron core 7 of the stator S, the rotor yoke 12 to which the permanent magnets 11 arranged in a cylindrical shape with a predetermined gap are attached, and the entire lower end of the rotor yoke 12. A bracket 13 for reinforcing the attachment strength of the polishing brush 2, and a short cylindrical shape whose upper surface is covered with a lid in order to cover the stator S together with the bracket 13 and the rotor yoke 12 and to support the entire outer rotor R. And the frame 14. In addition, the central portions of the bracket 13 and the polishing brush 2 have central portions corresponding to substantially the outer diameter of the hollow casing 1 so that the suction airflow 16 passing through the hollow portion 1a of the hollow casing 1 reaches the floor surface F. Missing holes 13a, 2a
Is provided. On the back surface of the polishing brush 2, a large number of substantially rectangular parallelepiped polishing brush bristles 2b are attached in a substantially radial pattern at predetermined intervals along the circumferential direction, and the polishing brush bristles 2b adjacent to each other are provided. A space 2c formed by the floor surface F and the floor F is configured to serve as a passage for the suction airflow 16.

The polishing brush 2 is integrally screwed (not shown) to the flange portion provided on the outer periphery of the opening of the frame 14 at the lower portion of the outer rotor R together with the portion near the outer periphery of the bracket 13. Further, in a portion near the inner circumference of the bracket 13, the rotor yoke 12 and a bearing holder 15 that supports the lower bearing 9 are fixed by screws (not shown). Therefore hollow casing 1
The hollow portion 1a of the inner periphery of the bracket has a missing hole portion 13a of the bracket 13 and a missing hole portion of the polishing brush 2 in which the rotor yoke 12 constituting the lower end surface of the outer rotor R is mounted in order to exert the suction airflow 16 on the floor surface F. 2a and so on. The upper portion of the frame 14 of the outer rotor R is screwed (not shown) and fixed to a bearing holder 15 that supports the upper bearing 9.

The hood 3 is provided on the outer peripheral portion of the upper end of the hollow casing 1 protruding above the motor M.
The opening is attached near the floor surface F, and the lower end of the suction hose 4 is attached to the hollow casing 1.
Is attached so as to cover the opening at the upper end of the. The other end of the suction hose 4 is switchably connected to either the suction blower or the detergent inlet.
Therefore, the suction airflow 16 exerted from the upper end of the suction hose 4
The cleaning agent 17 or the cleaning agent 17 passes through the suction hose 4 and the hollow portion 1a of the hollow casing 1, and the bracket 13 on the lower end surface of the outer rotor R and the missing hole portions 13a, 2a of the polishing brush 2.
The floor surface F can be reached. Also,
A handle 5 is attached to the outer upper end of the hood 3.

Next, a method of polishing using the floor surface polishing apparatus P ₁ will be described. In order to polish, the detergent 17 is first sprayed on the floor surface F. The detergent 17 introduced from the detergent introduction port attached through the suction hose 4 is connected to the lower end of the suction hose 4 and the hollow casing 1 of the motor M.
Of the polishing brush 2 is supplied to the floor surface F facing the missing hole portion 2a of the polishing brush 2 through the hollow portion 1a. Then, the motor M is driven to rotate the outer rotor R, and the polishing brush 2 fixed thereto is rotated,
In this state, the handle 5 is pushed and pulled to move the floor polishing apparatus P ₁ . As shown in FIGS. 2 and 3, the detergent 17
Is rotated by centrifugal force from the center of the polishing brush 2,
A range in which the space 2c is sewn toward the outer peripheral direction, is radially diffused, is further applied along the circumferential direction in which the polishing brush bristles 2b rotate, and the floor surface polishing apparatus P ₁ moves. It is quickly sprayed on the floor surface F facing the polishing brush 2. Further, since the outer peripheral opening of the hood 3 faces the floor surface F in the vicinity thereof, the detergent 17
Can be prevented from scattering. In the present embodiment, an example in which a detergent is added has been described, but not only that, but it is also possible to apply wax or a floor surface polishing agent to the floor surface in the same manner for polishing.

After the detergent 17 is sprayed on the floor surface F, the connection portion on the upper end side of the suction hose 4 is switched to the suction blower. Then, in parallel with the polishing work of the floor surface F, the suction blower is operated in order to remove dust thereon. Then, as shown in FIG. 1 to FIG.
Sucks dust on the floor surface F facing the polishing brush 2 in the range where the floor polishing device P ₁ moves from the outer peripheral portion of the polishing brush 2 to the center by sewing between the spaces 2c. do it,
Can collect dust. The dust is sucked into the suction airflow 16, guided into the suction hose 4 connected to the upper end of the hollow casing 1, and accumulated in a predetermined dust collecting place. Can be removed.

By polishing in this manner, the floor surface F can be polished and the detergent 17 can be sprayed simultaneously, so that cleaning can be performed efficiently. Further, since polishing can be performed while applying the suction airflow 16 to the floor surface F, the floor surface F can be polished and dust can be collected at the same time, and the finished state of polishing (polishing accuracy).
Will get better. Further, the suction airflow 16 and the detergent 17 are passed through the suction hose 4 and the floor surface polishing device P facing the floor surface F.
Since it can be exerted from the central portion of ₁ , the effects thereof are easy and effective over the entire floor surface F facing the floor polishing device P ₁ . Further, on the lower surface of the floor polishing apparatus P ₁ , there is a missing hole portion 2a to which the polishing brush bristles 2b of the polishing brush 2 are not attached, but the floor polishing apparatus P ₁ moves on the floor surface F. Therefore, there is no polishing residue in the missing hole portion 2a. In this way, when the amount of dust scattered on the floor surface F is small, the dust can be collected by suction while polishing.

Further, since the hollow casing 1 is a motor having an outer rotor structure, its diameter is larger than that of the floor polishing apparatus P ₁ , and the handle 5 attached to the upper end thereof.
Can be installed easily and robustly, and thus the operability of the floor surface polishing apparatus P ₁ is improved. Further, as compared with a motor having an inner rotor structure having the same size, a large rotational torque can be obtained at the outer peripheral portion of the outer rotor R of the motor M, so that the floor surface polishing apparatus P ₁ can be designed compactly.

Next, a trolley-mounted floor polishing apparatus P _{2 according} to a second embodiment of the present invention will be described. 4 and 5 are vertical cross-sectional views of the floor polishing apparatus P ₂ in use.
And FIG. The floor polishing device P ₂
The two floor polishing devices P ₁ of the first embodiment with the handle 5 removed are horizontally arranged on the platform 22 of the carriage 21, and the entire platform 22 and the floor polishing device P ₂ are arranged. The hand push handle 24 attached to the cover body 23 for covering is operated for polishing. The two floor polishing devices P ₂ are
From the through hole portion 22a provided in the table 22, the polishing brush 2
Of the base 2 so that the part of the
2, the upper end of the hollow casing 1 and the suction blower 25 installed inside the carriage 21 are connected by the suction hose 4, and the suction air flow 16 thereof is the same as in the case of the first embodiment. It is configured to extend to the floor surface F.
Further, a detergent input port 26 is provided above the dolly 21, and the detergent 17 placed therein is used for the detergent input pipe 27.
It is configured such that it can reach the inside of the suction hose 4 via and can be sprayed on the floor surface F as in the case of the first embodiment. In the floor surface polishing apparatuses P ₂ , P ₃ and P ₄ of the second to fourth embodiments, the configuration of the motor M is the same, and only the drawings are shown to avoid redundant description.

In this way, the two floor polishing devices P ₂
Although the weight of the entire floor surface polishing apparatus is increased by mounting the table on the carriage 21 and polishing, the total moving distance can be shortened and polishing of the entire floor surface can be completed efficiently.
In addition, 28 is a wheel, 29 is an operation part for switching energization to the motor M and operation of the suction blower 25, and 30 is an impeller in the suction blower 25.

Next, a trolley-mounted floor surface polishing apparatus P _{3 according} to a third embodiment of the present invention will be described. 6 and 7 are vertical sectional views of the floor polishing apparatus P ₃ in use,
FIG. 3 is a plan view with a part broken away. Floor polishing device P
Reference numeral ₃ indicates a suction airflow that is formed in the circulation path while forming a circulation path for the airflow therein and disposing a fan 31 in the middle of the circulation path to discharge a discharge airflow 32a toward the polishing floor surface F. It is an apparatus for polishing and cleaning while collecting dust by circulating an air flow by continuing with 32b. The floor surface polishing apparatus P ₃ is mainly the floor surface polishing apparatus P of the second embodiment in the configuration of the hood portion for forming the circulation path.
Different from ₂ .

At the upper end of the hollow casing 1, an inner hood 33 covering the entire outside of the motor M is continuously formed, and the hollow casing 1 and the inner hood 33 are integrated to form a double cylinder. The circulation path forming member 34 of the structure is configured. That is, the circulation path forming member 34 is a member having a double cylindrical structure including an inner cylindrical portion formed of the hollow casing 1 and an outer cylindrical portion formed of the inner hood 33, and the inner cylindrical portion ( Only the hollow casing 1) is opened, and the inner cylindrical portion (hollow casing 1) and the outer cylindrical portion (inner hood 33) are formed so as to be closed in a mountain shape. Outside the circulation path forming member 34, an outer hood 35 having a lower end opening is arranged near the floor surface F so as to cover the whole, and the outer hood 35 and the inner hood 33 are provided. The space portion 36 and the hollow portion 1a of the hollow casing 1 are fixed to the circulation passage forming member 34 so as to continuously form a part of the circulation passage. The space portion 36 and the hollow portion 1a constitute a circulation path for the air flow 32 via the space portion 2c of the polishing brush 2.

A fan 31 for generating a discharge airflow 32a toward the floor F is arranged inside the inner cylindrical portion of the circulation path forming member 34 (hollow portion 1a of the hollow casing 1), and above the fan 31, A dust collecting filter 37 is arranged. By driving the fan 31, a discharge airflow 32a is generated on the front surface thereof, and in the space portion 36 extending from the back surface of the fan 31 to the vicinity of the space lower end portion 36a between the inner and outer hoods 33, 35. Causes a suction airflow 32b. The discharge airflow 32a emitted from the fan 31 reaches the floor surface F facing the missing hole portion 2a of the polishing brush 2 from the central portion of the polishing brush 2 rotationally driven by the motor M to the space 2c thereof. The space is sewn, passes through substantially radially (see FIGS. 2 and 3), and reaches the space lower end portion 36a. During this time, dust on the floor surface F facing the polishing brush 2 rotating in the range in which the floor surface polishing apparatus P ₃ moves is sucked into the discharge airflow 32a, and the suction airflow that is continuous with the discharge airflow 32a at the space lower end portion 36a. It is sucked into 32b. The suction airflow 32b containing dust rises in the space 36 toward the back surface of the fan 31 and again inside the inner cylindrical portion of the circulation path forming member 34 (the hollow portion 1 of the hollow casing 1).
Cycle to a). At this time, the dust contained in the suction airflow 32b can be collected and removed on the dust collecting filter 37. Reference numeral 38 denotes an arm for fixing the outer hood 35 to the inner hood 33, and the fan 31 is rotatably supported by a motor 39 mounted on the outer top of the outer hood 35. .

According to the method of circulating the airflow 32 to remove dusts, unlike the case where the suction airflow 16 is exerted, the exhaust air accompanying the intake air is not discharged to the outside of the floor surface polishing apparatus P ₃ . , More hygienic polishing can be performed. Further, since the floor surface polishing apparatus P ₃ is not provided with a detergent inlet or a large blower for exerting an air flow outside thereof, the floor surface polishing apparatus as a whole can be made compact.
It is convenient to use for polishing a place with relatively little dirt.

Next, a trolley-mounted floor polishing apparatus P _{4 according} to a fourth embodiment of the present invention will be described. FIG. 8 is a vertical cross-sectional view of the floor surface polishing apparatus P ₄ in use. The floor surface polishing apparatus P ₄ is different from the floor surface polishing apparatus P _{3 of} the third embodiment mainly in utilizing a circulating air flow 42 generated by using a blower 41 mounted on the outside thereof. The circulation path forming member 44 having a double cylindrical structure including an inner cylindrical portion (hollow casing 1) and an outer cylindrical portion (inner hood 43) is a pipe-shaped inner cylindrical portion (hollow casing 1).
Is formed by attaching an outer cylindrical portion (inner hood 43) to the outer side of the inner cylindrical portion (hollow casing 1) so as to project upward. On the outside of the circulation path forming member 44, an outer hood 4 having an opening 45a obliquely upwardly provided in a protruding inner cylindrical portion (hollow casing 1).
5 are attached, and a space 46 is formed between them. Inner cylindrical part protruding (hollow casing 1)
A first circulation hose 48a is attached to the outer side of the upper end of the second circulation hose 48b, and a second circulation hose 48b is attached to the opening 45a.
Connected to 1. Therefore, in the floor polishing apparatus P ₄ , the space 46 and the hollow portion 1a of the hollow casing 1 are
The air flow 4 is passed through the space 2c of the polishing brush 2, the first and second circulation hoses 48a and 48b, and the blower 41.
It is configured to form two circulation paths.

Discharge airflow 42a emitted from the blower 41
Through the first circulation hose 48a and the inner cylindrical portion of the circulation path forming member 44 (the hollow portion 1a of the hollow casing 1),
The ejected abrasive brush 2 of the missing hole 2a opposite to the floor surface F, in the same manner as floor polisher P _3, reaches the space the lower end 46a between the inner and outer of each hood 43, 45 The suction airflow 42b containing dust rises in the space 46 and circulates from the opening 45a to the blower 41 via the second circulation hose 48b. The dust trapped in the suction airflow 42b can be collected on the dust collecting filter 47, and thus can be removed from the airflow 42.

According to the method of removing the dust by giving the circulating airflow 42 as described above, a blower larger than the fan 31 can be attached to the outside, so that the air pressure of the airflow 42 can be increased and the dirt can be relatively cleaned. It is convenient when used for polishing many places.

[0032]

In the floor polishing apparatus according to the present invention, an outer rotor motor is used as a motor for rotating a polishing brush, and a hollow pipe-shaped casing vertically arranged at the center thereof is used as an airflow passage. Therefore, when there is little dust scattered on the floor surface, suction and recovery (cleaning) of dust can be performed at the same time while polishing, and the floor surface can be polished well and the floor surface can be polished. If both cleaning and cleaning are considered together, the overall efficiency will increase.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a floor polishing device P ₁ .

FIG. 2 is a bottom view of the same.

FIG. 3 is a perspective view showing a bottom surface of the same.

FIG. 4 is a vertical sectional view of the floor polishing apparatus P ₂ in use.

FIG. 5 is a plan view of the same with a part thereof broken away.

FIG. 6 is a vertical cross-sectional view of the floor polishing apparatus P ₃ in use.

FIG. 7 is a plan view of the same with a part thereof broken away.

FIG. 8 is a vertical cross-sectional view of the floor polishing apparatus P ₄ in use.

FIG. 9 is a vertical sectional view of a conventional floor polishing apparatus.

[Explanation of symbols]

F: Floor M: Motor R: Outer rotor (rotor) S: Stator 1: Hollow casing (casing) 1a: hollow part 2: Polishing brush 2a: Missing hole 2b: Polishing brush bristles 2c: Space part 3: Hood 4: Suction hose 5: Handle 13a: Missing hole 16: Suction flow 31: Fan (suction device) 32, 42: Air flow 32a, 42a: discharge air flow 32b, 42b: suction air flow 33, 43: Inner hood 34, 44: Circulation path forming member 35, 45: Outer hood 36, 46: Space section 36a, 46a: lower end of space 37: Dust collection filter 41: Blower (suction device)

Claims (4)

[Claims] 1. A floor polishing apparatus in which a polishing brush is attached to a rotor of an outer rotor motor, wherein a hollow pipe-shaped casing is vertically arranged in the center of the motor, and a stator is fixed to the outside of the casing. The rotor is mounted rotatably on the outside of the stator via a bearing, and a polishing brush whose central portion is cut off by an amount corresponding to the outer diameter of the casing is horizontally arranged at the lower end of the casing. In this state, the floor polishing apparatus is integrally mounted on the rotor, and a suction hose is connected to the upper end of the casing. 2. The floor polishing apparatus according to claim 1, wherein a hood that covers the entire motor and the polishing brush and a handle are integrally attached to the casing. 3. A floor polishing apparatus in which a polishing brush is mounted on a rotor of an outer rotor motor, wherein a hollow pipe-shaped casing is vertically arranged at the center of the motor, and a stator is fixed to the outside of the casing. The rotor is mounted rotatably on the outside of the stator via a bearing, and a polishing brush whose central portion is cut off by an amount corresponding to the outer diameter of the casing is horizontally arranged at the lower end of the casing. In this state, the rotor is integrally attached to the rotor, the inner hood that covers the outside of the entire motor is integrally attached to the upper end of the casing, and the entire upper end is partially open in a double cylindrical shape. Of the inner hood, an outer hood is disposed outside the inner hood, and a space between the inner and outer hoods, and the inside of the casing. The inter is, constitutes a circulation path of the air flow, the circulation path of the arranged suction device during, floor polishing apparatus characterized in that it is arranged to emit the airflow into the circulation path. 4. The floor polishing apparatus according to claim 3, wherein a filter for trapping dust contained in the air flow is attached to the opening on the upper end side of the circulation path forming member.