JP3665486B2 - Floor cleaning machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a floor cleaning machine that cleans and polishes a floor surface and a wax layer surface, and more particularly, to a pad holding means.
[0002]
[Prior art]
Currently, in building maintenance, a type of apparatus is generally used for floor cleaning, in which a small motor and drive unit called a floor polisher and a mounting pad of a cleaning pad or cleaning brush having a diameter of 200 to 400 mm are directly connected. . In this floor polisher, the pressing force of the pad applied to the floor is 14 to 40 kg which is the weight of the entire machine. In addition, as a large-scale washing machine that can clean a large area with high efficiency, an apparatus that rotates an electric motor while pressing one large circular pad against the floor surface with an appropriate pressure is also used. The rotation speed of the pads of these large and small washing machines is generally 200 to 500 rpm.
[0003]
Further, a buffing machine is also used in which a wax layer is formed on the floor surface after cleaning, and the wax surface is buffed to make a smooth surface without irregularities, so that dirt does not accumulate easily and a clean surface can be maintained for a long time. This buffing machine is also provided with one large circular pad for polishing, and the wax surface is polished while rotating at a high speed by an electric motor, for example, about 1500 to 2000 rpm, while pressing the floor surface with a necessary pressure. Is to do.
[0004]
After a smooth wax surface is formed on the floor surface by buffing as described above, usually, cleaning with a washing machine and polishing with a buffing machine are repeated as daily management, and before the wax layer is completely consumed. Apply wax regularly and manage the remaining wax layer.
[0005]
[Problems to be solved by the invention]
In the conventional washing machine and buffing machine as described above, the circular pad is nut-fastened to the rotary holder by a bolt that penetrates the center of the pad.
[0006]
However, when the pad is passed through a bolt and tightened with a nut, not only the nut may loosen due to rotation during use, but the pad may come off, and a tool is required to attach and detach the nut. Is cumbersome and time consuming, and sometimes the nut is lost. Also, the use of nuts increases the weight of the device.
[0007]
In view of the above problems, an object of the present invention is to provide a floor having a pad holding mechanism that can easily attach and detach a circular pad without using a nut or a screw, and can stably hold the circular pad without coming off even when rotating at a high speed. To provide a cleaning machine.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, in the floor cleaning machine according to the first aspect of the present invention, a main body equipped with a rotation driving device, a pad holder that rotates on the lower surface of the main body by the rotation driving device, and a pad holder are exchanged. A floor cleaning machine comprising a circular pad held coaxially and capable of polishing or wiping the floor surface by rotating around the axis of the circular pad;
The pad holder has a circular pad mounting recess that opens downward with a depth smaller than the thickness of the circular pad, and the pad mounting recess has a substantially flat inner top surface and an outer diameter of the circular pad. A plurality of inner surfaces are surrounded by a circular inner peripheral surface separated from the outer periphery of the circular pad by an inner diameter, and are engaged with one end surface of the circular pad so that the inner top surface can be removed by manually peeling the circular pad. the first protrusion is provided on the inner peripheral surface, with a circular pad when the circular pad with a centrifugal force by rotation is deformed diameter shape is engaged with the outer peripheral surface of the circular pad so as not to come off from the mounting recess in the rotation stopped state is characterized in that the second protrusion of the plurality that will be disengaged from its outer circumferential surface by the outer diameter of the circular pad is restored to the original is provided.
[0009]
In the present invention, a plurality of first protrusions are provided on the inner top surface of the pad mounting recess of the pad holder, and the circular pad is detachably locked to the recess by engaging with the upper end surface of the circular pad. Is. Further, the circular inner peripheral surface of the recess is provided with a plurality of second protrusions, so that when the circular pad is in a rotating state and deformed into an enlarged diameter by centrifugal force, the outer peripheral surface of the circular pad is Since the second protrusion is engaged close to the surface, the circular pad does not jump out of the mounting recess.
[0010]
In addition, when the rotation is stopped, the outer diameter of the circular pad is restored to the original state, so that the outer peripheral surface and the second protrusion are loosened or completely released, whereby the circular pad is substantially caused by the first protrusion. Since it is in the engaged state only at the end face, it can be easily removed by peeling it off by hand.
[0011]
Specifically, the first protrusion and the second protrusion of the present invention may be a large number of simple thin pin-shaped protrusions, but may be, for example, hook-type or mushroom-type protrusions that constitute a so-called hook-and-loop fastener. Usually, a circular pad used for cleaning and polishing is made of a material such as nylon or polyester processed into a non-woven fabric, and the surface thereof stands up like a mesh.
[0012]
Accordingly, such a circular pad surface is used as a pile surface, and the first protrusion and the second protrusion are engaged with each other at a number of locations, so that the circular pad can be stably locked to the mounting recess and can be removed. It can be done simply by peeling.
[0013]
In such an engagement method using the first and second protrusions, the circular pad can be locked and mounted in the mounting recess with a sufficient engaging force without using a nut or a screw, and can be easily removed at the time of removal. Since it can be peeled off, the replacement work of the circular pad becomes simple.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, as one embodiment of the present invention, a floor cleaning machine provided with five small circular pads having a diameter of about 80 mm at the lower part of the main body is shown in FIGS. Fig.1 (a) is a schematic block diagram of the floor cleaning machine of this embodiment, and is especially a fragmentary sectional view which shows a lower structure, (b) is the top view which looked at the cleaning machine of (a) from the downward direction. is there. 2A and 2B are schematic views showing the configuration of the holder, wherein FIG. 2A is a longitudinal sectional view and FIG. 2B is a plan view.
[0015]
In the floor cleaning machine of the present embodiment, a cover part 2 is provided below the cleaning machine main body 1 to cover the cleaning area and prevent dirt and dust from scattering due to cleaning and polishing on the floor surface. Five circular pads 7 are mounted in the circular recesses of the five pad holders 4 serving as holders at the lower part of the main body in the cover portion 2.
[0016]
These pad holders 4 are suspended below the five holding shafts 3 at the bottom of the main body 1 via spring members 6. Further, at the lower part of the holding shaft 3, each pivot shaft 5 is integrally projected so as to penetrate the center of each pad holder 4, and each pad holder 4 corresponds to each expansion and contraction of the spring member 6. While being slidable in the vertical direction with respect to the pivot shaft 5, it is biased downward (floor surface side) by the spring member 6 in advance.
[0017]
The inside of the circular recess of the pad holder 4 is shallower than the circular pad 7 and has an inner peripheral diameter slightly larger than the outer peripheral diameter of the circular pad 7, and as shown in FIG. The first engagement surface 20 having a plurality of first protrusions is provided on the inner top surface other than the central region where the spring grooves 12 and the spring member locking grooves 13 are formed.
[0018]
The first protrusion of the first engagement surface 20 is a hook-type or mushroom-type protrusion that is generally used for a Velcro fastener, and easily engages by contact with the surface of the circular pad 7 as a pile surface. The engagement state can be easily released by simply pulling the circular pad 7 and removed.
[0019]
Furthermore, a second engagement surface 21 having a plurality of thin pin-like protrusions as second protrusions is provided on the inner peripheral surface of the recess. The second engagement surface is hardly in contact with the outer peripheral surface of the circular pad 7 when stopped, but the outer periphery of the circular pad 7 is deformed when the circular pad 7 undergoes a diameter-enlarged deformation due to a centrifugal force caused by rotation. The surfaces are brought into close engagement and the circular pad 7 is locked.
[0020]
For this reason, the attachment and detachment of the circular pad 7 is very easy because it is almost engaged and released only with respect to the first protrusion of the first engagement surface 20, and at the time of rotation, it is very easy to contact the second engagement surface 21. A stable mounting state is maintained without the circular pad 7 being detached from the pad holder 4 by the engaged state.
[0021]
In the present embodiment, the circular pads 7 are also urged downward (floor side) in advance by the pad holder 4 suspended in a downwardly urged state from the spring members 6. ing. When each circular pad 7 is pressed from the lower side against this urging, the pad holder 4 slides upward with respect to each corresponding pivot shaft 5.
[0022]
Further, in the present embodiment, each pivot shaft 5 has a regular hexagonal cross section, and is fitted into the regular hexagonal outer peripheral shape of the through hole 12 formed in the pad holder 4. As a result, when each pivot shaft 5 rotates, the pad holder 4 pivoted in the fitted state to each pivot shaft 5 also rotates about the axis.
[0023]
Further, four casters 10 are attached on the periphery of the lower part of the main body 1 in the cover 2 at equal angular intervals, and a certain distance corresponding to the height of the casters 10 is provided between the lower part of the main body 1 and the floor surface. It was supposed to be maintained. Therefore, when the cleaning machine is placed on the floor surface F, the circular pad 7 is pushed back to the lower end of the caster 10 by the floor surface F against the spring bias. In the floor cleaning machine of this embodiment, each circular pad 7 is pushed back. Always presses the floor F with a predetermined pressure.
[0024]
Further, in the present embodiment, as shown in FIG. 1B, the five circular pads 7 are designed so that the other four are arranged in the four directions with one circular pad 7 as the center. Therefore, the rotation shaft M rotated by an electric motor (not shown) as a rotation driving means built in the main body 1 is connected to the holding shaft 3 for the circular pad 7 arranged at the center, so that the rotation is directly transmitted. The rotation is transmitted from the central holding shaft 3 to the other four holding shafts 3 by the same endless timing belt 11 in which all the holding shafts 3 are engaged.
[0025]
Accordingly, when the holding shaft 3 at the center position is rotated by the electric motor rotating shaft M, the pivot shaft 5 integrally projecting at the lower portion thereof is also pivoted, and the pivot shaft 5 is fitted to the pivot shaft 5. The circular pad 7 at the center position together with the pad holder 4 being rotated is rotated along the horizontal plane (floor surface F) around the vertical axis, and at the same time, the other four are transferred from the central holding shaft 3 via the endless timing belt 11. The rotation is transmitted to the holding shaft 3, and the pad holder 4 and the circular pad 7 corresponding to each holding shaft 3 start to rotate around the vertical axis as the pivot shaft 5 rotates.
[0026]
Since the pad holder 4 in the present embodiment can hold the circular pad 7 stably even at high speed rotation, particularly by the engagement state with the second engagement surface 21 provided with a plurality of second protrusions, for example, 200 to 500 rpm. It can be used not only for cleaning machines having a relatively low rotation speed, but also for polishing apparatuses that perform high-speed rotation of about 1500 to 2000 rpm, and is also sufficiently effective for ultra-high-speed rotation apparatuses of 8000 to 11000 rpm.
[0027]
【The invention's effect】
As described above, according to the floor cleaner of the present invention, the circular pad can be easily attached to and detached from the pad holder without using a tool, and is always stably held by the holder during high-speed rotation. Even when a plurality of small circular pads are provided, the efficiency of workability such as pad replacement is high, and there is an effect that the circular pad is not detached from the holder during cleaning.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of a floor cleaning machine as an embodiment of the present invention, in which (a) is a partial longitudinal sectional view particularly explaining a lower structure, and (b) is a drawing of the cleaning machine of (a) from below. FIG.
2A and 2B are schematic views for explaining a configuration of a pad holder of the floor cleaning machine of FIG. 1, wherein FIG. 2A is a longitudinal sectional view, and FIG. 2B is a plan view.
[Explanation of symbols]
1: body 2: cover part 3: holding shaft 4: pad holder 5: pivot shaft 6: spring member 7: circular pad 10: free caster 11: timing belt 12: through hole 13: spring member locking groove 20: First engagement surface (first protrusion)
21: Second engagement surface (second protrusion)
M: Electric motor rotation axis F: Floor surface

Claims (1)

A main body equipped with a rotary drive device, a pad holder that rotates on the lower surface of the main body by the rotary drive device, and a circular pad that is coaxially held by the pad holder in a replaceable manner. In floor cleaning machines that polish or wipe the floor surface,
The pad holder has a circular pad mounting recess that opens downward with a depth smaller than the thickness of the circular pad, and the pad mounting recess has a substantially flat inner top surface and an outer diameter of the circular pad. A plurality of inner surfaces are surrounded by a circular inner peripheral surface separated from the outer periphery of the circular pad by an inner diameter, and are engaged with one end surface of the circular pad so that the inner top surface can be removed by manually peeling the circular pad. the first protrusion is provided on the inner peripheral surface, with a circular pad when the circular pad with a centrifugal force by rotation is deformed diameter shape is engaged with the outer peripheral surface of the circular pad so as not to come off from the mounting recess floor cleaning machine, wherein a second projection of the plurality that will be disengaged from its outer circumferential surface by the outer diameter of the circular pad is restored to the original is provided in the rotation stopped state.

Images