WO2007047856A2 - Machine d'entretien de sol equipee d'une brosse cylindrique a faisceaux spirales - Google Patents

Machine d'entretien de sol equipee d'une brosse cylindrique a faisceaux spirales Download PDF

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Publication number
WO2007047856A2
WO2007047856A2 PCT/US2006/040913 US2006040913W WO2007047856A2 WO 2007047856 A2 WO2007047856 A2 WO 2007047856A2 US 2006040913 W US2006040913 W US 2006040913W WO 2007047856 A2 WO2007047856 A2 WO 2007047856A2
Authority
WO
WIPO (PCT)
Prior art keywords
trailing
leading
brush
rows
tufts
Prior art date
Application number
PCT/US2006/040913
Other languages
English (en)
Other versions
WO2007047856A3 (fr
Inventor
David W. Wood
Donald Joseph Legatt
Nick Graupe
Original Assignee
Nilfisk-Advance, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nilfisk-Advance, Inc. filed Critical Nilfisk-Advance, Inc.
Priority to US12/090,835 priority Critical patent/US20080276414A1/en
Publication of WO2007047856A2 publication Critical patent/WO2007047856A2/fr
Publication of WO2007047856A3 publication Critical patent/WO2007047856A3/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L11/00—Machines for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L11/29—Floor-scrubbing machines characterised by means for taking-up dirty liquid
    • A47L11/30—Floor-scrubbing machines characterised by means for taking-up dirty liquid by suction
    • A47L11/302—Floor-scrubbing machines characterised by means for taking-up dirty liquid by suction having rotary tools
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B13/00—Brushes with driven brush bodies or carriers
    • A46B13/001—Cylindrical or annular brush bodies
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L11/00—Machines for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L11/02—Floor surfacing or polishing machines
    • A47L11/10—Floor surfacing or polishing machines motor-driven
    • A47L11/14—Floor surfacing or polishing machines motor-driven with rotating tools
    • A47L11/18—Floor surfacing or polishing machines motor-driven with rotating tools the tools being roll brushes
    • A47L11/19—Parts or details of the brushing tools
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L11/00—Machines for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L11/40—Parts or details of machines not provided for in groups A47L11/02 - A47L11/38, or not restricted to one of these groups, e.g. handles, arrangements of switches, skirts, buffers, levers
    • A47L11/4036—Parts or details of the surface treating tools
    • A47L11/4041—Roll shaped surface treating tools
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L11/00—Machines for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L11/40—Parts or details of machines not provided for in groups A47L11/02 - A47L11/38, or not restricted to one of these groups, e.g. handles, arrangements of switches, skirts, buffers, levers
    • A47L11/4063—Driving means; Transmission means therefor
    • A47L11/4069—Driving or transmission means for the cleaning tools
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B9/00—Arrangements of the bristles in the brush body
    • A46B9/02—Position or arrangement of bristles in relation to surface of the brush body, e.g. inclined, in rows, in groups

Definitions

  • the present invention generally relates to floor maintenance, particularly to both sweeping and wet scrubbing floors while removing only a negligible amount of floor finish, and specifically to novel cylindrical brushes which sweep and wet scrub without noticeably scratching or dulling the floor and to floor maintenance machines utilizing such novel brushes.
  • Floor maintenance on finished floors typically involves several separate operations. On floors such as resilient tile, polished concrete or colored epoxy, a floor finish is applied to the floor. The floor finish protects the floor surface and provides a glossy, clean appearance. Often, several coats of finish are applied to provide additional protection and longer wear.
  • Daily maintenance is performed by first pre-cleaning such as pre-sweeping or dust-mopping to remove debris from the floor. This is followed by scrubbing with an automatic scrubber. Automatic scrubbers dispense cleaning solution onto rotating agitator disc pads or brushes. The spent cleaning solution is then recovered with a vacuumized squeegee. Operation of automatic scrubbers is well known.
  • the scrubbing operations also remove a small amount of floor finish. This is due to the abrasive composition of the scrub pads/brushes. The rotation of the pads/brushes creates very small scratches in the finish which dull the appearance of the floor.
  • the scrubbing operation is followed by high speed burnishing. Burnishing also removes a small amount of finish from the floor. Burnishing is a dry polishing process, and some of the dry, powdered floor finish becomes airborne and settles back onto the floor and surrounding surfaces. This often necessitates yet another operation to dust-mop the floor.
  • Restoration of finish requires periodic stripping and recoating of finish.
  • the majority of the cost of floor maintenance is not the equipment or the cleaning chemicals, but the labor to perform the above steps. If one or more steps in the process can be completely eliminated, the overall cleaning cost can be reduced significantly.
  • One conventional solution was to combine the pre-cleaning and scrubbing operations into one machine such as by using cylindrical scrub brushes instead of the more common disc style pads/brushes.
  • the cylinder brushes sweep debris into a hopper while simultaneously performing the task of scrubbing. These cylinder brushes typically rotate at around 900 RPMs or less. The bristles on these cylinder brushes tend to be relatively stiff so that they can both sweep and scrub.
  • the cylindrical scrubbers currently on the market remove a small amount of finish and create small scratches in the floor finish. As a result, they dull the appearance of the floor. So while cylindrical brush scrubbers currently available eliminate the need to pre-clean, they do not reduce or eliminate the need to burnish the floor to restore an acceptable level of gloss.
  • the present invention addresses a need in floor maintenance to reduce or eliminate steps in the daily cleaning of finished floors.
  • the present invention solves several of the problems involved in daily floor maintenance by providing a machine that sweeps and wet scrubs while removing only a negligible amount of floor finish, and which does not noticeably scratch or dull the floor.
  • This invention thus eliminates the need for pre-sweeping, frequent burnishing, and post- mopping. Additionally, because far less finish is removed, the frequency of stripping and recoating the floor is greatly reduced.
  • the present invention relates to a brush and a floor maintenance machine utilizing such a brush.
  • a multiplicity of rows of a multiplicity of tufts of bristles are equally circumferentially spaced on the cylindrical outer surface of a cylindrical core, are arranged at an acute angle to the rotational axis to create a spiral, and repeat in at least one identical row pattern upon the cylindrical outer surface. Tufts of an adjacent trailing row are indexed laterally from a leading row by an index distance less than one half of the equal spacing of the tufts in each of the multiplicity of rows.
  • counter rotating leading and trailing cylindrical brushes move in an operation direction with their rotational axes being spaced and parallel to each other and to the floor.
  • the rotational speed of the trailing cylindrical brush is greater than that of the leading brush to enhance sweeping performance.
  • the leading and trailing cylindrical brushes are of identical construction and include tufts of bristles arranged in a multiplicity of rows arranged at an acute angle to the rotational axis of the brush.
  • a cylindrical brush moving in an operation direction parallel to the floor is rotated about a rotational axis at a rotational speed in the order of 1200 to 1800 RPMs to enhance polishing benefit.
  • the brush includes tufts of bristles arranged in a multiplicity of rows arranged at an acute angle to the rotational axis of the brush.
  • Figure 1 shows a perspective view of a floor maintenance machine according to the preferred teachings of the present invention.
  • Figure 2 shows an exploded perspective view of portions of a floor maintenance machine of Figure 1.
  • Figure 3 shows a perspective view of a cylindrical brush utilized in the floor maintenance machine of Figure 1.
  • Figure 4 shows a front elevation view of the cylindrical brush of Figure 3.
  • Figure 5 shows an end elevation view of the cylindrical brush of Figure 3.
  • Figure 6 shows a diagrammatic view of the outer surface of the cylindrical brush core of Figure 3 with the tufts of bristles removed and with the outer surface unwrapped. All figures are drawn for ease of explanation of the basic teachings of the present invention only; the extensions of the figures with respect to number, position, relationship, and dimensions of the parts to form the preferred embodiment will be explained or will be within the skill of the art after the following description has been read and understood. Further, the exact dimensions and dimensional proportions to conform to specific force, weight, strength, and similar requirements will likewise be within the skill of the art after the following description has been read and understood. Where used in the various figures of the drawings, the same numerals designate the same or similar parts.
  • a floor surface maintenance machine such as a floor surface sweeping and wet scrubbing machine according to the preferred teachings of the present invention is diagrammatically shown in Figure 1 and generally designated 10.
  • machine 10 is movably supported by three or more wheels, casters or the like 12 upon the surface to be cleaned, with one or more of the wheels, casters or the like 12 being driven if desired.
  • the operator can either walk behind or ride upon machine 10 as desired.
  • Machine 10 includes suitable elements for maintaining the floor surface such as first and second rotatable cylindrical brushes 14 mounted to machine 10 for rotation about spaced parallel rotational axes 42 parallel to the floor as diagrammatically shown.
  • brushes 14 are of identical construction.
  • a cleaning solution such as but not limited to water and water-based solutions (which can be premixed or which could be separately provided and mixed within the machine 10 where desired) is delivered via line 15 from a source of cleaning solution in the form of a solution tank 16 adjacent to brushes 14 such as by a solution pump 18 in fluid communication with tank 16.
  • machine 10 includes a recovery tank 26 and a suitable vacuum system including a solution pickup element 28 such as squeegee as diagrammatically ⁇ shown for collecting solution from the surface to be cleaned and delivering such collected solution to recovery tank 26.
  • a hopper 33 is positioned above and intermediate the first and second brushes 14 for receiving debris swept from the floor as brushes 14 are simultaneously moved in an operation direction parallel to the floor. It should be appreciated that hopper 33 allows solution and small particles to flow therethrough to the floor but retains debris and large particles which can be manually removed such as by sliding hopper 33 from machine 10 and emptying. However, hopper 33 can take other forms and/or could be eliminated in certain embodiments according to the preferred teachings of the present invention.
  • Machine 10 as previously described can be of a variety of types and forms, and the present invention is not intended to be limited to any particular type or form including but not limited to the type or form shown and/or described.
  • each brush 14 generally includes a cylindrical core 40 mounted for rotation about rotational axis 42.
  • cylindrical core 40 is in the form of a tube which is slideably received on spindles 44. At least one of such spindles 44 of each brush 14 is rotated by a motor 46 through a suitable drive such as sheaves and a V-belt 48.
  • core 40 can have other forms as is known in the art.
  • core 40 can be driven by different manners as is known in the art according to the teachings of the present invention such as, but not limited to, by a single motor 46 while having drives resulting in the desired speed relationship, or the like.
  • each cylindrical core 40 includes a cylindrical outer surface 50 having a core diameter D3 and concentric to rotational axis 42 at a radial spacing equal to one half of core diameter D3.
  • core 40 includes a multiplicty of drilled tuft holes 52 extending radially into cylindrical outer surface 50.
  • Each of the tuft holes 52 has a diameter 52a.
  • Each of tuft holes 52 receives a multiplicity of individual bristles B to define an individual tuft 54 extending radially from rotation axis 42.
  • tuft holes 52 and thus tufts 54 are arranged as a multiplicity of rows R.
  • rows R are spaced by a row spacing S circumferentially around cylindrical outer surface 50, and in the most preferred form, row spacing S is equally spaced between each of rows R around the entire cylindrical outer surface 50.
  • each of the rows R includes a multiplicity of tuft holes 52 and tufts 54 which are spaced by a tuft spacing I.
  • tuft spacing I is equally spaced in each and every row R, and row spacing S is generally equal to tuft spacing I.
  • cylindrical brush 14 includes several features which cooperate together to produce synergistic results.
  • One such feature is that rows R of spaced tufts 54 of bristles B are arranged in a spiral at an acute angle Al to the rotational axis of between 15 and 25° and preferably in the order of 20° when measured at surface 50 unrolled and lain flat. Spiraling tufts 54 minimize imprints of tufts 54 on the floor finish as occurs when tufts are arranged in straight rows across the brush.
  • each tuft 54 in brush 14 is formed by a multiplicity of individual bristles B received in drilled tuft hole 52 in core 40
  • the diameter D3 of core 40 of brush 14 is in the range of 2 to 5 inches and in the most preferred form in the order of 2.9 inches.
  • the diameter 52a of drilled tuft hole 52 in core 40 is in the range of 0.25 to 0.375 inches and in the most preferred form in the order of 0.31 inches.
  • the length of bristles B extending from tuft hole 52 is in the range of 1.25 to 1.75 inches and in the most preferred form in the order of 1.5 inches.
  • the ratio of length of bristles B to the diameter of tuft drill hole 52 is in the range of 4.5:1 to 5:1 and in the preferred form in the order of 4.8: 1.
  • Each bristle B in the preferred form is formed from 0.008 inch crimped type 6.12 nylon in the preferred form. The crimp amplitude is around 0.025 inch and the pitch is around 0.11 inch.
  • Bristles B could also be formed by polypropylene having a similar flex modulus or other water resistant bristle material according to the teachings of the present invention. Likewise, although crimping adds fullness to tufts 54, bristles B could be flagged to add fullness according to the teachings of the present invention.
  • tuft 54 is affected by length of bristles B and the number of tufts 54 per area. Specifically, the distance I between adjacent tufts 54 within the same row R is in the range of 0.50 inch to 0.75 inch and in the most preferred form is in the order of 0.59 inch. The exact distance I between tufts 54 is determined by the length of rows R along the working length Dl of brush 14. The length of rows R is divided by the preferred distance and rounded to the nearest whole number.
  • the spacing S between rows R of spaced tufts 54 of bristles B is generally the same as the distance I between adjacent tufts 54 in rows R in the preferred form.
  • the number of rows R should result in row patterns repeating itself at least once for each full rotation of brush 14.
  • the number of rows R of tufts 54 is in the range of 14 to 18 rows R and in the most preferred form in the order of 16 rows R.
  • a 16-row brush 14 could have either two or four identical groups of eight rows or four rows R, respectively.
  • a 15-row brush 14 could have three identical pattern groups of five rows R each.
  • An 18-row brush 14 could have either two or three identical groups of nine rows R or six rows R, respectively.
  • tufts 54 are indexed such that tufts 54 in trailing rows R are indexed laterally by a distance T from tufts 54 in the preceding or leading row R.
  • Distance T depends upon the number of rows R and the number of repeat patterns formed by the rows R. Particularly, distance T is equal to the distance I between tufts 54 in the same row R divided by the product of the number of rows R in turn divided by the number of repeat patterns. In the preferred form, distance T is of an amount no greater than in the order of one half of diameter 52a of tuft holes 52 in cylindrical outer surface 50 of brush 14 for receiving tufts 54 and not less than one ninth of diameter 52a of tuft holes 52 in cylindrical surface 50 of brush 14 for receiving the tufts 54. m the most preferred form, distance T is in the order of one quarter of diameter 52a of tuft holes 52 in cylindrical outer surface 50 of brush 14 for receiving tufts 54.
  • At least one of brushes 14 is rotated by floor maintenance machine 10 faster than cylindrical brushes of conventional automatic scrubbers such that the tip speed of bristles B is faster in the present invention than in conventional automatic scrubbers.
  • cylindrical brushes of convention automatic scrubbers were typically rotated at 900 RPMs and resulted in individual tuft imprints on the floor finish.
  • the trailing brush 14 in the direction of travel is counter rotated at a speed in the range of 1200 to 1800 RPMs and preferably in the order of 1500 RPMs, and with the preferred bristle length resulting in a tip speed in the range of 1850 to 2750 feet per minute and preferably in the order of 2300 feet per minute.
  • Such speeds according to the preferred form of the present invention synergistically resulted in polishing benefits which were not obtained at conventional speeds.
  • the angle Al and speed are related. For any given RPM, if angle Al is too shallow or too great, row effect or tuft imprints as experienced with conventional automatic scrubbers may result.
  • leading and trailing brushes 14 are different, with trailing brush 14 in the direction of travel rotating faster than the leading brush 14.
  • leading brush 14 is rotated in the order of 900 RPMs. It was surprisingly discovered that sweeping performance of machine 10 was better when brushes 14 were rotated at differing speeds, and the polishing benefit was still obtained if trailing brush 14 was rotated faster than conventional speeds.

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  • Brushes (AREA)

Abstract

L'invention concerne des brosses cylindriques avant et arrière (14) pour une machine d'entretien de sol qui sont déplacées en cours d'usage pour balayer et laver à l'eau un sol. Dans différents aspects, la brosse cylindrique arrière (14) est mise en rotation à une vitesse de rotation supérieure à celle de la brosse cylindrique avant (14) pour augmenter la capacité de balayage de préférence de l'ordre de 1500 RPM afin d'améliorer le polissage. Les brosses (14) de l'invention comprennent des rangées (R) composées d'une pluralité de faisceaux (54) à espacement régulier, lesdites rangées étant spiralées, espacées de manière circonférentielle et régulière. Les faisceaux (54) d'une rangée (R) arrière adjacente sont indexés latéralement par rapport à une rangée (R) avant par une distance (T) d'indexation inférieure à la moitié de la distance (I) des faisceaux (54) dans les rangées (R).
PCT/US2006/040913 2005-10-18 2006-10-18 Machine d'entretien de sol equipee d'une brosse cylindrique a faisceaux spirales WO2007047856A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US12/090,835 US20080276414A1 (en) 2005-10-18 2006-10-18 Floor Maintenance Machine Using a Spiral, Tufted, Cylindrical Brush

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US72795005P 2005-10-18 2005-10-18
US60/727,950 2005-10-18

Publications (2)

Publication Number Publication Date
WO2007047856A2 true WO2007047856A2 (fr) 2007-04-26
WO2007047856A3 WO2007047856A3 (fr) 2007-10-25

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PCT/US2006/040913 WO2007047856A2 (fr) 2005-10-18 2006-10-18 Machine d'entretien de sol equipee d'une brosse cylindrique a faisceaux spirales

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Country Link
US (1) US20080276414A1 (fr)
WO (1) WO2007047856A2 (fr)

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EP2018821A2 (fr) 2007-07-24 2009-01-28 Alfred Kärcher GmbH & Co. KG Dispositif de nettoyage pour une machine de nettoyage du sol et machine de nettoyage du sol dotée d'un tel dispositif de nettoyage
US9289105B2 (en) 2008-10-16 2016-03-22 Koninklijke Philips N.V. Device and method for wet floor cleaning
CN109008833A (zh) * 2018-09-17 2018-12-18 康建国 一种新式的便捷拆卸的地面清理机器人

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EP2747626B1 (fr) * 2011-08-23 2017-05-03 Koninklijke Philips N.V. Dispositif de nettoyage destiné à nettoyer une surface
JP6067718B2 (ja) * 2011-10-03 2017-01-25 コーニンクレッカ フィリップス エヌ ヴェＫｏｎｉｎｋｌｉｊｋｅ Ｐｈｉｌｉｐｓ Ｎ．Ｖ． 真空掃除機の床面ノズル
USD734573S1 (en) * 2013-05-17 2015-07-14 Alfred Kaercher Gmbh & Co. Kg Floor cleaning machine
USD779138S1 (en) * 2015-01-09 2017-02-14 Alfred Kaercher Gmbh & Co. Kg Machine for cleaning floors
USD785254S1 (en) * 2015-03-31 2017-04-25 Alfred Kaercher Gmbh & Co. Kg Floor cleaning machine
IT201800002834U1 (it) * 2018-06-21 2019-12-21 Spazzola cilindrica
US11291345B2 (en) 2018-08-27 2022-04-05 Techtronic Floor Care Technology Limited Floor cleaner
USD910941S1 (en) * 2019-01-10 2021-02-16 Maverick Surface Preparations, LLC Equipment cowling
US20210330151A1 (en) * 2020-04-24 2021-10-28 Techtronic Cordless Gp Floor cleaner including an agitator
EP4285802A1 (fr) * 2021-04-28 2023-12-06 Shen Zhen 3irobotix Co., Ltd. Machine à nettoyer les sols
US20230226658A1 (en) * 2022-01-17 2023-07-20 Diamabrush Llc Abrasive device for floor scrubbing, cleaning and/or polishing

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GB673176A (en) * 1950-01-10 1952-06-04 Gunnard Rossel Improvements in or relating to cylindrical brushes
EP0265407A2 (fr) * 1986-10-20 1988-04-27 National Union Electric Corporation Assemblage à brosse entraînée par un moteur pour un aspirateur de poussière
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EP1449474A1 (fr) * 2003-02-22 2004-08-25 Vorwerk & Co. Interholding GmbH Brosse cylindrique placé dans une balayeuse à tapis et accouplement d'une partie motrice avec une partie entraínée

Cited By (5)

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Publication number Priority date Publication date Assignee Title
EP2018821A2 (fr) 2007-07-24 2009-01-28 Alfred Kärcher GmbH & Co. KG Dispositif de nettoyage pour une machine de nettoyage du sol et machine de nettoyage du sol dotée d'un tel dispositif de nettoyage
DE102007037052A1 (de) * 2007-07-24 2009-02-05 Alfred Kärcher Gmbh & Co. Kg Reinigungsvorrichtung für eine Bodenreinigungsmaschine sowie Bodenreinigungsmaschine mit einer derartigen Reinigungsvorrichtung
EP2018821A3 (fr) * 2007-07-24 2010-03-03 Alfred Kärcher GmbH & Co. KG Dispositif de nettoyage pour une machine de nettoyage du sol et machine de nettoyage du sol dotée d'un tel dispositif de nettoyage
US9289105B2 (en) 2008-10-16 2016-03-22 Koninklijke Philips N.V. Device and method for wet floor cleaning
CN109008833A (zh) * 2018-09-17 2018-12-18 康建国 一种新式的便捷拆卸的地面清理机器人

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WO2007047856A3 (fr) 2007-10-25

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