JP2009261490A - Squeegee for floor surface cleaner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a squeegee for collecting dirty water thoroughly regardless of situations of floor materials in the squeegee for a floor surface cleaner for cleaning the floor surface, though floor materials used for the floor surface of a building are selected in view of the purpose of use of the building, its atmosphere, and appearance, and a variety of materials are used. <P>SOLUTION: A blade ahead in the forward direction is curved in the forward direction and the thickness of a blade top is 2 mm or less so as to cope with a large rugged shape, so that lowering of internal negative pressure is reduced. A backward blade is curved in the forward direction, is tilted at an acute angle with respect to the tangential line of a forward direction side circular arc at the foremost end, and formed. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

      The present invention relates to a squeegee for a floor cleaning machine that cleans a floor surface by rotating a pad or brush while spraying a cleaning liquid while traveling, and recovering the sewage by exerting a suction action of a vacuum fan.

      Since the flooring material used for the floor of a building is selected in consideration of the purpose of use of the building, the atmosphere and the viewpoint of beauty, a wide variety of materials are used.

      For example, in hospitals, health facilities, and common halls of condominiums, a sheet with small irregularities on the surface is installed to prevent slipping from the viewpoint of preventing users from falling.

    Installation of braille blocks for blind people is also becoming popular in public facilities such as stations and airports.

      In commercial facilities, floor materials with irregularities on the surface of the stone and mirror-finished surfaces are installed next to each other to improve the atmosphere and aesthetics and increase the ability to attract customers.

      The configuration of the squeegee for the floor cleaning machine currently used for various floors as described above is a horizontally long and spaced at the front and rear of a squeegee frame in which both ends are curved in the direction of squeegee travel. A flexible blade is attached so as to exert a suction action of a vacuum fan through a hose within a squeegee interval constituted by these front and rear blades.

      Looking at the ideas so far, there are many things related to the shape of the flexible blade attached to the front and rear of the squeegee frame.

      Although the tip of the rear blade is bent in the traveling direction and scraped off by the tip surface as in Patent Document 1, improvement was seen for large unevenness, but it was not sufficient for small unevenness.

      In Patent Document 2, the tip of the rear blade is greatly curved and scraped off at the edge of the tip, but small unevenness is good, but large unevenness is not sufficient.

In Patent Document 3, sewage splashed up from joints such as a tiled floor surface can be eliminated, but only that improvement has been achieved.
JP-A-10-146305 JP 2006-314664 A JP2008-036379

      Although it has been devised as described above, it has not reached the point where it can be recovered without leaving sewage in all places when cleaning the place where various floor materials are mixed inside and outside the building and collecting the sewage. .

      Accordingly, an object of the present invention is to provide a squeegee for more completely collecting sewage on various floor surfaces.

      As is the case with Patent Document 1, Patent Document 2, and Patent Document 3 described above, the front blade attached to the front of the conventional squeegee frame is plate-shaped, and the plate thickness is 3 mm or more. A slit is provided.

      When the front blade passes over a particularly large uneven surface of the floor surface, the conventional front brace does not follow the unevenness of the floor surface so much that a gap is generated between the floor surface and the front blade tip.

      By reducing this gap, it was considered that the negative pressure inside the squeegee frame 71 can be maintained and the recovery rate of sewage can be improved.

Therefore, in the present invention, two flexible blades attached to the front of the squeegee frame 11 in the traveling direction are attached to the front of the squeegee frame 11 b) The front outer blade 17 attached to the outer front of the squeegee frame 11 and in contact with the floor surface. The shape is bent in the direction of travel and the thickness of the blade tip that is in contact with the floor surface is 2 mm or less. The shape of the front inner blade 23 attached to the other squeegee frame 11 is longer than the bottom surface 22 of the squeegee frame. This is attached as a shorter length than the front outer blade 17.

      The reason for the above b) is that when the blade is bent in the advancing direction so as to bite into the irregularities of the floor surface, it is difficult to bite if the thickness of the blade is thick, so that it is 2 mm or less.

      The above a) and c) are because the squeegee frame interior 71 has a negative pressure, so the front blade is pushed up by the atmospheric pressure 73.

      In order to maintain the negative pressure inside the squeegee frame 71, a repulsive force that opposes the force 73 that is pushed up by the atmospheric pressure is required, so the upper part is thickened with two blades in front of the squeegee frame.

      In order to set the negative pressure in the squeegee frame 71 to a desired value, it can be adjusted by a combination of the thickness and length of the two blades on the front inner side and the outer side.

      As described above, the front outer blade tip 24 in contact with the floor surface follows the unevenness of the floor surface, the gap between the floor surface and the front outer blade tip 24 is reduced, and the negative in the squeegee frame 71 is reduced. I was able to keep the pressure.

      Next, in the flexible blade attached to the rear of the squeegee frame in Patent Document 1, the blade tip followed the unevenness of the floor surface with respect to the large unevenness, which was quite good.

      However, the rear blade tip did not reach the concave portion of the small uneven portion of the floor surface, and sewage remained.

      Therefore, in the present invention, the shape of the lower end portion of the rear blade 14 attached to the rear of the squeegee frame is curved in the traveling direction, and is inclined at an acute angle with respect to the tangent line of the traveling direction side arc at the forefront 22.

    The effect appears from the time when the tip 22 is formed at an inclination of about 70 degrees with respect to the tangential line of the traveling direction side arc, and the rear blade tip 25 comes into contact with the concave portion of the small uneven portion of the floor surface, so that almost no sewage I did not leave.

      For example, the squeegee frame 71 has a flat floor and the negative pressure inside the squeegee frame is maintained at about 600 to 650 mm. The squeegee of the present invention is a 250 to 300 mm water column when passing through a braille block having four rectangular 4 mm protrusions. The recovery rate of sewage was improved.

      In the same manner as described above, the conventional squeegee in which the negative pressure inside the squeegee frame 71 is maintained at about 600 to 650 mm water column on a flat floor surface can keep only about 50 mm water column when passing the braille block as described above.

      By combining the improvement of the front blade 17 and the improvement of the rear blade 14, the recovery rate of sewage was able to be improved even at large uneven portions and small uneven portions on the floor surface.

      Eliminating the need to wipe out the remaining wastewater that has been used to ensure safety, it has become possible to improve work efficiency.

      As shown in FIG. 1, the blades before and after being attached to the squeegee frame 11 are attached so as to be in contact at both ends 15 so that the inflow of air into the squeegee frame inside 71 is minimized.

      The shape of the tip portion of the front outer blade 17 outside the front of the squeegee frame 11 is first curved downward from the bottom surface 22 of the squeegee frame toward the traveling direction with a large radius arc, and then the arc having a smaller radius than the upper portion. Then, it is curved toward the traveling direction side, and finally, it is curved toward the traveling direction side with an arc having a small radius of about three times the thickness of the blade.

      The thickness of the front outer blade 17 is initially 3 mm downward from the bottom surface 22 of the squeegee frame, about 1 mm at the lowermost portion, and about 0.5 mm at the most advanced portion.

      As shown in FIG. 3, a notch 31 or a slit 32 is provided at the tip of the front outer blade 17.

      As shown in FIG. 5, the shape of the front inner blade 23 inside the squeegee frame 11 is made shorter from the bottom surface 22 of the squeegee frame 11 toward the both ends with the central portion 51 being longer.

      As shown in FIG. 6, the rear blade 14 attached to the rear of the squeegee frame is attached in two pieces on the left and right.

      This is because, as described in Patent Document 3, sewage splashing from joints parallel to the traveling direction is eliminated.

      The shape of the lower end portion of the rear blade is first curved downward from the bottom surface 22 of the squeegee frame toward the advancing direction with an arc of a large radius, and subsequently curved toward the advancing direction with an arc of a radius smaller than the upper part. Is curved in the same direction with a circular arc having a small radius of about 3 times the thickness of the blade.

      The thickness of the rear blade is 3 mm at the bottom from the bottom surface 22 of the squeegee frame, and is about 2 mm at the bottom, then bent to about 160 degrees and inclined at an acute angle with respect to the tangent of the traveling direction side arc at the forefront. Formed.

      FIG. 4 explains the most advanced blade shape common to the front and rear blades of the present invention.

      FIG. 4 shows a blade formed by curving the lower end portion of the blade in the traveling direction and tilting about 30 degrees 42 with respect to the tangent 41 of the traveling direction side arc 43.

      In the conventional blade, as shown in FIG. 8, the lower end portion of the blade is curved in the traveling direction, and is formed at a right angle 82 with respect to the tangent 81 of the traveling direction side arc 83.

      When the front outer blade is curved in the advancing direction and formed at an acute angle with respect to the tangent of the arc on the advancing direction side, the front outer blade 17 described above in the best mode from the time when the angle is about 60 degrees. Demonstrate the ability to follow the uneven surface of the floor.

    At this time, a notch or a slit is provided in the lower end portion of the blade to adjust the negative pressure 71 inside the squeegee frame.

      In the best mode, the change in the arc radius on the traveling direction side where the front outer blade is curved in the traveling direction is performed twice, but it may or may not be performed once.

      When the front outer blade 17 has the same shape and the same flexibility, the negative pressure inside the squeegee frame 71 can be changed by changing the thickness of the front inner blade 23 and the length downward from the bottom surface 22 of the squeegee frame. I can do it.

      The negative pressure inside the squeegee frame 71 can also be adjusted by the number and shape of the cutouts 31 and the slits 32 provided at the tip of the front outer blade 17.

      In the best mode, the arc radius on the traveling direction side curved in the traveling direction in the rear blade 14 is changed twice, but it may or may not be changed once.

FIG. 3 is a squeegee perspective view of the present invention. Is an enlarged cross-sectional view of the AA cross section of the present invention Figure 2 is a front view of the front outer blade of the present invention Is an enlarged side view of the blade tip of the present invention Is a front view of the front inner blade of the present invention Is a perspective view of the rear blade of the present invention Is an enlarged cross-sectional view of the AA cross section during suction of the present invention Is an enlarged side view of the conventional blade tip

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Squeeze frame 12 Hose connection port connected to a vacuum fan 13 Embedded nut 14 for mounting on a floor cleaning machine Rear blade 15 Blade end portion 16 Front blade presser plate 17 Front outer blade 21 Rear blade presser plate 22 Squeeze frame bottom surface 23 Front inner side Blade 24 Front outer blade tip 25 Rear blade tip 31 Notch 32 in front outer blade tip 32 Slit 41 in front outer blade tip 41 Blade tangent of the latest traveling direction side arc 42 Inclined angle 43 The arc 51 on the traveling direction side of the blade tip 51 The front inner blade central portion 71 The squeegee frame inside 72 The floor surface 73 Atmospheric pressure 81 The tangent line 82 of the leading edge of the conventional blade on the traveling direction side Tip direction It was formed for the arc tangent angle 83 arc traveling direction side of the conventional blade tip

Claims (5)

A flexible blade is attached to the front and back of a squeegee frame that is horizontally long and curved at both ends in the direction of travel of the squeegee, and a vacuum fan is passed through a hose within the squeegee interval formed by these front and rear blades. The squeegee is configured to suck cleaning sewage from the floor surface by exerting the suction action of the rear blade, and the shape of the lower end portion of the rear blade attached to the rear of the squeegee frame with respect to the traveling direction.
・ Curve in the direction of travel
A squeegee for a floor cleaning machine characterized by being formed at an acute angle with respect to the tangent line of the traveling direction side arc at the most advanced. A flexible blade is attached to the front and back of a squeegee frame that is horizontally long and curved at both ends in the direction of travel of the squeegee, and a vacuum fan is passed through a hose within the squeegee interval formed by these front and rear blades. The squeegee is configured to suck the cleaning sewage from the floor surface by exerting the suction action of the blade, and the shape of the lower end portion of the blade contacting the floor surface is attached to the front of the squeegee frame with respect to the traveling direction.
・ Curve in the direction of travel
-A squeegee for a floor cleaning machine, wherein the blade tip has a thickness of 2 mm or less. A flexible blade is attached to the front and back of a squeegee frame that is horizontally long and curved at both ends in the direction of travel of the squeegee, and a vacuum fan is passed through a hose within the squeegee interval formed by these front and rear blades. The squeegee is configured to suck the cleaning sewage from the floor surface by exerting the suction action of the blade, and the shape of the lower end portion of the blade contacting the floor surface is attached to the front of the squeegee frame with respect to the traveling direction.
・ Curve in the direction of travel
A squeegee for a floor cleaning machine characterized by being formed at an acute angle with respect to the tangent line of the traveling direction side arc at the most advanced.   3. A squeegee for a floor cleaning machine according to claim 2, wherein a slit or notch is provided at the tip of the blade. 4. A squeegee for a floor cleaning machine according to claim 3, wherein a slit or a notch is provided at the tip of the blade.

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