Floor sweeper

A floor sweeper is disclosed. The floor sweeper has a handle, a main body including a detergent compartment, a roller mechanism including a roller with a washing belt thereon, a scraper and a waste fluid compartment. Detergent is dripped from the detergent compartment onto the washing belt. The washing belt washes a floor and wipes stains therefrom due to frictional contact therewith during the forward motion of the floor sweeper. Waste fluid soaked into the washing belt is squeezed from the belt by the scraper and is collected in the waste fluid compartment during the backward motion of the sweeper.

BACKGROUND OF THE INVENTION 
This invention relates to a floor sweeper and more particularly to a hand 
operated floor sweeper which can wipe stains from a floor and collect the 
waste fluid from the floor. 
As a floor sweeper for the purpose of washing a floor surface by dripping a 
detergent onto a rotary brush, there are already known a floor sweeper 
wherein a rotary brush for washing a floor surface is pivotally mounted in 
a housing and wherein a detergent tank is disposed to supply the rotary 
brush with a detergent. However, this floor sweeper in the prior art has 
such drawbacks that although the floor surface is washed and cleaned in 
the washing operation, waste fluid cannot be collected therefrom and, 
subsequently, the fluid is left behind on the floor. If a carpet, 
particularly is taken as an example of a floor surface, waste fluid sinks 
deep into the carpet after the washing so that stains are formed at the 
back surface thereof, contrary to the cleanliness of the top surface. 
Further, the known floor sweeper is provided with a valve means for 
supplying the rotary brush with detergent in a constant amount. However, 
it is difficult to keep the amount of the detergent supplied constant 
because the dripping amount thereof decreases as the detergent level is 
lowered. For this reason, the valve means must be adjusted often to keep 
the dripping amount constant in relation to the level of the detergent. 
SUMMARY OF THE PRESENT INVENTION 
Accordingly, it is an object of the present invention to provide a floor 
sweeper which can wash and clean a floor surface by wiping stains 
therefrom and collecting the resultant waste fluid. 
It is anohter object of the present invention to provide a floor sweeper 
wherein handling the apparatus is very easy. 
It is a further object of the present invention to provide a floor sweeper 
wherein the washing portion thereof may be easily replaced. 
It is a still further object of the present invention to provide a floor 
sweeper wherein detergent is supplied in a constant amount onto a rotary 
brush regardless of any change in the level thereof in a detergent storage 
compartment. 
According to the present invention, there is provided a floor sweeper which 
includes a handle for operating the floor sweeper by hand, and a main body 
having a detergent compartment for containing detergent for washing and 
cleaning a floor. A roller is provided for washing and cleaning the floor 
by wiping up the stains therefrom and for collecting the waste fluid from 
the floor surface. The roller has a washing belt on the outer surface of a 
roller and is adapted to be braked by a stopper which stops the rotation 
thereof during forward motion of the floor sweeper. The stopper can to be 
released to allow the rotation of the roller during the backward motion 
thereof. A scraper collects the waste fluid in the washing belt and is 
installed to slightly press the washing belt and squeeze the waste fluid 
therefrom. A waste fluid compartment contains the waste fluid collected by 
the scraper. A predetermined amount of the detergent is dripped onto the 
washing belt of the roller so that the floor is washed and cleaned by the 
detergent sunk in the washing belt and stains on the floor are wiped due 
to the frictional contact of the stopped roller portion during the forward 
motion of the floor sweeper, and the waste fluid is collected into the 
waste fluid compartment by the scraper from the washing belt of the 
rotating roller during the backward motion of the floor sweeper. 
In a preferred embodiment of the present invention, the floor sweeper may 
be provided with a special compartment for adjusting the dripping rate of 
the detergent, the compartment having a ridge with an inside wall 
perpendicular to the moving direction of the floor sweeper and an outside 
wall planted toward the perpendicular wall. 
The detergent compartment is provided with a plurality of projecting 
apertures through which the detergent is dripped directly onto the washing 
belt of the roller. Further, a valve mechanism may be installed in the 
dripping amount adjusting compartment so that the detergent is dripped 
through the valve means onto the washing belt.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
Referring to FIGS. 1 through 5, these views illustrate one embodiment of a 
floor sweeper for for washing a floor surface. A main body 1 of the floor 
sweeper is provided with a detergent compartment 11 with a bottom member 2 
and side walls formed by the main body 1. Detergent contained in the 
detergent compartment 11 is dripped in predetermined amounts, which are 
adjusted by a valve mechanism 3, through projecting apertures onto a 
washing member 41 of a roller mechanism 4. The roller mechanism 4 is 
adapted to stop rotating when the floor sweeper moves forward; the roller 
mechanism 4, however rotates due to contact between the washing belt 41 
and the floor as the floor sweeper moves backward. The floor is washed and 
cleaned by wiping up the stains thereon due to the frictional contact 
between the stopped washing belt 41, which holds the detergent therein, 
and the floor surface during the forward motion of the floor sweeper. 
After the washing operation, waste fluid absorbed by the washing belt 41 
is squeezed from the belt 41 and collected in a waste fluid compartment 50 
by a scraper 53 during the backward motion of the sweeper. This is a 
fundamental construction and operation of a floor sweeper according to the 
present invention. Further, the construction thereof will be explained in 
more detail as follows. 
(1) Mechanism for the supplying of a detergent and the amount adjustment 
thereof 
Detergent or water is poured through a pouring mouth 15 into the detergent 
compartment 11. The detergent drips through a valve mechanism 3 which 
adjusts the amount thereof dripped onto the washing belt 41. The valve 
mechanism 3 comprises a valve seat 25 on the bottom member 2 and a rubber 
valve 33 fixedly covering the lower end of a shaft 31. The shaft 31 is 
provided with a knob 30 at the top thereof and has a ring shaped convex 
portion 32 threaded with a female screw formed at a downwardly extending 
portion of an opening 12. Turning of the knob 30 causes the shaft 31 and, 
accordingly, the rubber valve 33 to move vertically and thereby adjust the 
dripping rate of the detergent in accordance with the change in the gap 
between the valve seat 25 and the rubber valve 33. At the lower portion of 
the valve seat 25 is fixedly supported a block 27 with a plurality of 
projecting apertures 28 therethrough. 
(2) Mechanism of a washing belt and a roller 
A roller 42 is covered around its outer surface with the washing belt 41 
which is barrel shaped both ends of the belt being open. The belt is cloth 
or nonwoven fabric. Detergent is continuously dripped through the 
projecting apertures 28 onto the washing belt 41. The roller 42 is formed 
at its outer surface with a plurality of striped convex ridges 43 which 
are parallel to the axis of the roller so that the washing belt 41 is 
prevented from sliding on the roller 42. A stopper member 64 is installed 
so that the roller mechanism 4 stops rotating when the floor sweeper moves 
forward, yet permits the roller mechanism 4 to rotate when the sweeper 
moves backward. The detergent is uniformly dripped onto the entire surface 
of the washing belt 41, so that the floor is washed and cleaned and due to 
the friction of the stopped washing belt 41 during the forward motion of 
the floor sweeper. 
At the inner ends of the roller 42 are two members 44 for supporting a 
shaft 45 which is rotatably supported and fixed at both ends thereof 
through bearing members 46 to the main body 1. 
(3) Mechanism for supporting a roller 
The inner surfaces of the side walls of the main body 1 have protrusions 16 
thereon for receiving the elastic bearing members 46. The protrusions 16 
are adapted to press the bearing member 46 inwardly as shown in FIG. 4A so 
that the bearing member 46 is held in such a manner that the concavities 
of the protrusions 16 engage with the convexities of the bearing member 46 
respectively as shown in FIG. 4B so that the bearing member will not drop 
down when the bearing member 46 is inserted in its compressed shape into 
the protrusions 16. Once in place, the bearing member 46 may no longer 
detached in the direction of an arrow in FIG. 4A from the protrusion 16. 
The shaft 45 is forcedly inserted through an opening 48 into the bearing 
member 46. The shaft 45 is firmly and rotatably supported by the bearing 
member 46 because the opening 48 thereof is narrowed due to the elasticity 
thereof. However, the shaft can be removed by forcefully widening the 
opening 48 thereof so as to allow passage therethrough of the shaft. 
(4) Mechanism for rotating and stopping a roller 
The bearing member 46 is eliptical so as to allow a shaft 45 to move 
forward and backward therein. This causes the roller mechanism 4, that is, 
the shaft 45 thereof, to move backward as shown by the letter Y in FIG. 3 
when a frictional resistance is established between the washing belt 41 
and the floor surface during the forward motion of a floor sweeper. 
Accordingly, the rotating of the roller mechanism 4 can be forcefully 
stopped because the washing belt 41 presses against a stopper 64. The 
stopper 64 has an uneven surface and is installed on the inner side wall 
of the box member 6 of the waste fluid compartment. The roller 43 can be 
braked by the stopper 64 even when the washing belt 41 is decreased in its 
diameter due to the abrasion thereof because the shaft 45 of the roller 43 
is positioned in the bearing member 46 so that it has a clearance therein 
in which it is able to move toward the stopper 64 as shown by a letter X 
in FIG. 3. 
On the other hand, the shaft 45 is forced forward as shown by a letter Z in 
FIG. 3 during the backward motion of the floor sweeper so that the roller 
mechanism 4 is allowed to freely rotate with the washing belt 41, since it 
is released from contact the stopper 64. It is preferred that the 
eliptical bearing member 46 be supported with the slanting center line 
thereof ascended at the right end thereof, as shown by letter a in FIG. 3. 
In this embodiment, the slant is 15.degree.. However, it should be 
understood that there is no limitation on that degree. 
(5) Mechanism for collecting waste fluid 
A floor is washed and cleaned are due to contact therewith by the washing 
belt 41 which holds detergent dripped from a detergent compartment 11. 
Waste fluid, including removed stains soaked into the washing belt 41, is 
squeezed from the belt by the scraper 53 as the washing belt 41 rotates in 
the clockwise direction during the backward motion of the floor sweeper. 
In more detail, the waste fluid falls into the waste fluid compartment 50 
through an entrance 51 in the upper member 5 thereof. The waste fluid is 
discharged through a discharging mouth 61 after a sufficient amount is 
collected. At the back side of the entrance 51 is a reverse flow 
preventing plate 52 under the upper member 5 for preventing the waste 
fluid from flowing in the reverse direction. The scraper 53 is plate 
shaped and is affixed to the upper member 5 by a rivet 54. The scraper 53 
may be metal or plastic and may be constituted such that the waste fluid 
can be squeezed from the washing belt 41 by using an elastic scraper 
pressing downwardly it. Further, the scraper may be formed integrally with 
the upper member 5. 
(6) Mechanism for maintaining the detergent level 
Within the bottom member 2 are two wave-shaped convex member 21 and 23. An 
adjusting groove 22 consists of this pair of wave-shaped convex portions 
and the side walls of the bottom member 2 to thereby provide a 
predetermined level of detergent for the valve mechanism which 
continuously drips detergent at a constant rate even though the amount of 
detergent continuously diminishes. When the floor sweeper according to the 
present invention moves forward and backward by the operation of a handle 
installed thereto, the detergent there inside shakes in accordance with 
this forward and backward motion. It is assumed that the level of the 
detergent gradually becomes lower than the height of the wave shaped 
convex portions 21 as the detergent is dispensed. However, when this is 
the case, the detergent positioned in an area A is forced to move into an 
area B and then into the adjusting groove 22 over the wave shaped convex 
portions 21 and 23 in accordance with the shaking motion of the floor 
sweeper, as shown in FIG. 1. The detergent positioned in an area C also 
moves into the adjusting groove 22. In this manner, the adjusting groove 
22 is always filled with detergent regardless of the overall supply of 
detergent in the sweeper. In the valve guide 24 in the center of the 
adjusting groove 22 are a plurality of vertical slits reaching the bottom 
thereof to allow the detergent to be dripped. The dripping rate is always 
constant because the valve mechanism assumes a single position and the 
adjusting groove 22 is always filled with the detergent as mentioned 
above. The wave shaped convex portions have a vertical wall and a slanting 
wall which help to move the detergent into the adjusting groove in 
accordance with the shaking motion of the sweeper. 
(7) Assembly and operation of a floor sweeper according to the present 
invention 
The floor sweeper according to the present invention is constructed as 
follows. The bottom member 2 is welded to the main body 1 by using, for 
example, a high frequency means etc; the shaft 31 covered with the rubber 
valve 34 and having a rubber packing 35 and an O ring 34 thereon is 
inserted through an opening 12 on the upper portion of the main body 1; 
and is turned a knob to thread the shaped convex portion of the shaft 31 
with a female screw onto a downwardly extending portion of the opening 12. 
The rubber packing 35 is closely in contact with an air aperture 14 in the 
opening 12 to prevent air from flowing and thereby stopping the dripping 
of the detergent as the knob is turned to close the valve while the flow 
of air through the air aperture helps the detergent to drip as the knob is 
turned upward along with the rubber packing to open the valve. The O-ring 
only works to keep a water tight characteristic. 
The block 27 is inserted into the block support 26 underneath member 2. The 
scraper 53 is fixed to the upper member 5 by a rivet 54 and the upper 
member 5 is welded to the box member 6 of the waste fluid compartment by 
using a high frequency means etc. 
The bearing members 46 engage the protrusions 16 which are designed to 
receive the bearing members, the convex portions thereof are positioned on 
inside walls of the main body 1. Further, fixing apertures 17 and 
protrusions and 62 are connected to each other to provide for the assembly 
of the main body 1 and the waste fluid compartment 50. 
A handle portion 72 is inserted into to a handle support 13. A reinforced 
member 72 is inserted into the lower inside of the handle 71 to provide a 
reinforced handle and to ensure a secure connection between the handle 
portion and the support 13. The handle may be a single rod or may be 
several rod units which can be connected to each other. A detergent 
pouring opening 15 and the discharging opening 61 are covered with caps 18 
and 63 respectively. 
Referring next to FIG. 6, there is shown another embodiment of a floor 
sweeper according to the present invention. This floor sweeper comprises a 
roller mechanism 4, a handle 7 and a detergent compartment 11. The roller 
mechanism 4 comprises a pair of rollers 42 and an endless washing belt 41 
stretched around the rollers 42. At the bottom of the detergent 
compartment 11 are a plurality of projecting apertures 28. A scraper 53 is 
positioned to press slightly against the washing belt 41 so that the waste 
fluid is collected in a waste fluid compartment 50. 
Referring final to FIG. 7, there is shown a further embodiment of a floor 
sweeper according to the present invention. In this embodiment, like 
numerals refer to like parts in FIGS. 1 through 6 so that respective 
explanations thereof are not made. However, an important difference in 
this embodiment is that the roller mechanism 4 is driven by a motor 80 
installed underneath the bottom member 2. A belt 81 is suspended between 
the motor 80 and a shaft 82 of the roller 4. The motor 80 may be turned on 
intermittently so as to stop its rotation during the forward motion of a 
floor sweeper. Alternatively, the motor 80 may be turned on continuously 
in the clockwise direction so that a friction of a washing belt with a 
floor is doubled to provide a better wiping operation of the floor during 
the forward motion of a floor sweeper while the floor sweeper is easy to 
move in the backward direction during the backward motion thereof. 
The following effects are expected in accordance with the construction of a 
floor sweeper of the present invention. 
(a) It is possible to wash and clean a floor by wiping up stains therefrom 
and to collect the waste fluid simultaneously in accordance with a series 
of the forward and backward motions performed by an operator. In one 
experiment, 75% of the detergent supplied from the detergent compartment 
was collected in the waste fluid compartment. 
(b) The amount of a detergent dripped is easily adjusted by only turning a 
knob in a valve mechanism. 
(c) It is easy to replace the washing belt and a roller with new ones when 
they become dirty. 
(d) The apparatus cleans very well because the application of the detergent 
and the washing are performed when the washing belt is stopped. 
(e) The means for collecting the waste fluid is simple. 
(f) The amount of a detergent being dripped is always constant regardless 
of the decrease in volume of detergent because of the provision of the 
groove for adjusting the dripping amount, which includes the wave shaped 
convex portions on the bottom of a detergent compartment. 
(g) A floor sweeper according to the present invention is constructed of 
numerous parts, each of which is easy and simple in construction, thereby 
making assembly, disassembly and transportation very easy.