Patent Publication Number: US-8973204-B2

Title: Cleaning element and cleaning tool

Description:
CROSS-REFERENCE TO PRIOR APPLICATION 
     This is a U.S. national phase application under 35 U.S.C. §371 of International Patent Application No. PCT/JP2007/52111 filed Feb. 7, 2007 and claims the benefit of Japanese Application No. JP2006-031123 filed Feb. 8, 2006. The International Application was published in Japanese on Aug. 16, 2007 as International Publication No. WO 2007/091591 under PCT Article 21(2), the content of which is incorporated herein in its entirety. 
     FIELD OF THE INVENTION 
     The present invention relates to a cleaning tool, and more particularly to a cleaning tool having a cleaning element for cleaning a surface to be cleaned inside a room or a vehicle. 
     BACKGROUND OF THE INVENTION 
     Various types of cleaning tools having a sheet-type cleaning element for wiping a surface to be cleaned are known. For example, Japanese non-examined laid-open Patent Publication No. 9-154791 discloses a cleaning tool having cleaning fabric and a holder that detachably holds the cleaning fabric inserted into a holding space of the cleaning fabric. This cleaning tool is capable of wiping a surface to be cleaned by using the cleaning fabric held via the holder. However, in designing a cleaning element or a cleaning tool of this type having the cleaning element, it is particularly required to provide an effective technique for enhancing its cleaning effect. 
     SUMMARY OF THE INVENTION 
     It is, accordingly, an object of the present invention to provide an effective technique for enhancing the cleaning effect in a cleaning tool having a cleaning element for cleaning a surface to be cleaned. 
     The above-described problem can be solved by the features of the claimed invention. This invention can be applied to the construction of cleaning tools for cleaning surfaces to be cleaned (floors, walls, ceilings, external walls, furniture, clothes, curtains, bedding, home electric appliances, etc.) inside and outside of houses, apartments, buildings, factories, vehicles, etc. or surfaces of human body parts to be cleaned. These surfaces to be cleaned may be either flat or curved, uneven or stepped or notched or otherwise irregular. 
     The cleaning element according to this invention is provided in order to solve the above-described problem. The cleaning element has a fiber bundle and a non-woven fabric laminated together. The cleaning element includes at least a tubular part, a receiving space, a brush part and a fiber extending region. In this invention, as for the structure having the fiber bundle and the non-woven fabric laminated together, two- or more-layer structure can be appropriately selected. 
     The non-woven fabric in this invention has a sheet-like configuration formed by fixing or entangling fibers by mechanical, chemical or heat treatment. Typically, the non-woven fabric partly includes thermoplastic fibers and thus can be fusion bonded. 
     The “fibers” in this invention are elements of yarn, textile or the like and defined as being thin and flexible fibers having a substantially longer length compared with the thickness. Typically, a long continuous fiber is defined as a filament and a short fiber as a staple. Further, the “fiber bundle” in this invention is a single fiber structure formed by the above-mentioned fibers, a fiber structure having the above-mentioned fibers aligned in the length direction and/or the radial direction (twist yarn, spun yarn, yarn to which a plurality of filaments are partially connected), or an assembly of the fiber structures. Typically, the fiber bundle is formed of polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), nylon, rayon or the like. In practical use, an assembly of filaments formed by opening a tow is frequently used as the fiber bundle. 
     The tubular part in this invention is a long part formed by folding back the cleaning element into a tubular shape such that the non-woven fabric of the cleaning element is located inside. The sectional shape of the tubular part widely includes circular, elliptical, triangular, rectangular, polygonal and other various shapes. Further, the tubular part may have a closed section or an open section which is not completely closed. 
     The receiving space in this invention is defined inside the tubular part and configured as a region (space) in which a holding part for holding the cleaning element is removably received. When the holding part for holding the cleaning element is in the mounted state or in the state received in the receiving space, the cleaning element is held by the holding part. Further, the user can replace the cleaning element by removing the cleaning element from the holding part as necessary. The cleaning element according to this invention may be of disposable type designed for single use, disposable type designed for multiple use which can be used several times, while retaining dust which has been removed from the surface to be cleaned, on a brush part, or reusable type which can be reused by washing. 
     The brush part in this invention forms a brush-like cleaning area in a region of the cleaning element other than the tubular part. The brush part has the fiber bundle on the outer side (on the surface side) and the non-woven fabric on the inner side. The brush part having such a construction is effective in sweeping away dirt and dust on the surface to be cleaned. The non-woven fabric of the brush part may be preferably configured as strips, and more preferably, the strips of the non-woven fabric may have a zigzag shape which can easily trap dust. 
     The fiber extending region in this invention is configured as a region in which a plurality of fibers extend parallel in a predetermined direction in its entirety or part of the fiber bundle disposed on an outer surface of the tubular part. The fiber extending region forms a second cleaning area other than the brush part. Thus, in the cleaning element in this invention, fibers are arranged regularly in its extending direction in the fiber extending region. Therefore, in cleaning operation, dirt attached or stuck to the surface to be cleaned can be efficiently scrubbed or scraped away by moving the fiber extending region in contact with the surface to be cleaned and in a direction transverse to the extending direction of the fibers. Particularly by using a fiber bundle having higher rigidity, especially higher cleaning effect can be obtained. 
     With such a construction, in addition to the brush part, the fiber bundle which is disposed on the outer surface of the tubular part can also be provided with a cleaning function, so that the cleaning effect can be enhanced. Specifically, the cleaning element of this invention is rationally configured to have the tubular part having not only an inherent function of receiving the holding part for holding the cleaning element but an additional cleaning function. 
     In the fiber extending region, a plurality of fibers may extend parallel in a direction transverse to the extending direction of the long tubular part extending along the extending direction of the holding part. 
     With this construction, in cleaning operation, dirt attached or stuck to the surface to be cleaned can be efficiently scrubbed or scraped away by moving the fiber extending region in contact with the surface to be cleaned and along the extending direction of the tubular part. 
     The fibers extending in the fiber extending region may contain brush-like fibers forming the cleaning area. The brush-like fibers may be formed in the fiber bundle, in its entirety or in part, on the outer surface of the tubular part. Such brush-like fibers are effective in sweeping away dirt and dust on the surface to be cleaned. Further, the brush-like fibers may be formed by cutting the fiber bundle of the cleaning element. Alternatively, fibers may be subjected to a raising process to form the brush-like fibers in advance and thereafter joined to the fiber bundle. 
     With this construction, the fiber bundle on the outer surface of the tubular part is provided with the same function as the brush-like part, so that regions which can be used for cleaning operation can be increased. By forming the brush-like fibers over the entire fiber bundle on the outer surface of the tubular part, the function of sweeping away dirt and dust on the surface to be cleaned can be further enhanced. Further, by forming the brush-like fibers in the fiber bundle in part on the outer surface of the tubular part, the cleaning element having higher versatility can be realized which also has the function of sweeping away with the brush-like fibers of the fiber bundle and the function of scrubbing away with fibers other than the brush-like fibers of the fiber bundle. 
     Further, the brush part may extend from the long tubular part extending along the extending direction of the holding part, in a direction transverse to the extending direction of the tubular part. The “extending direction of the brush part” here is defined as a direction in which fibers of the fiber bundle forming the brush part extend. It is only necessary for the extending direction of the brush part to be a direction transverse to the extending direction of the tubular part. Therefore, the extending direction widely includes not only the direction generally perpendicular to the extending direction of the tubular part, but a direction inclined at a predetermined angle with respect to the extending direction of the tubular part. 
     With such a construction, when the tubular part is disposed horizontally, the brush part can be arranged to extend vertically downward from the tubular part. Therefore, the fibers of the brush part can be effectively used for cleaning, so that the action of sweeping away dirt and dust on the surface to be cleaned can be easily performed. 
     Further, in the above-described cleaning element, the fiber bundle may face the side of the brush part which faces the surface to be cleaned and the tubular part is disposed on the face of the brush part which faces away from the surface to be cleaned. 
     With this construction, the cleaning element is provided in which the tubular part is disposed on the side of the brush part opposite to the surface to be cleaned. 
     The long tubular part may be bent at a predetermined point in its longitudinal direction into a U-shape such that two receiving spaces for receiving the holding part are formed in both end portions of the tubular part. By using the two receiving spaces as spaces for receiving two holding parts, a construction in which the holding parts do not easily come off the receiving spaces can be realized. Further, an upper surface of the U-shaped area may form the fiber extending region. With this construction, the fiber extending region of the tubular part can be increased in area per unit length, so that the cleaning effect can be increased. 
     With this construction, the cleaning element can be provided in which the long tubular part is U-shaped such that two receiving spaces for receiving the holding part are formed in both end portions of the tubular part and an upper surface of the U-shaped area forms the fiber extending region. 
     Further, in the cleaning element, the cleaning element may have a two-layer structure consisting of two layers of the fiber bundle and the non-woven fabric. 
     With this construction in which the cleaning element has a two-layer structure, the number of materials can be reduced, so that the cleaning element can be provided with a rational construction which in turn reduces manufacturing costs. 
     Further, based on this invention, a cleaning tool is provided which includes at least a cleaning element, a receiving space, a holding part and a grip part. The cleaning element further includes at least a tubular part, a brush part and a fiber extending region. 
     In this case, the cleaning element has a fiber bundle and a non-woven fabric laminated together, and the receiving space is provided in the cleaning element. The holding part is removably received in the receiving space of the cleaning element and serves to hold the cleaning element. Further, the grip part is connected to the holding part and designed to be held by a user. 
     Particularly, the cleaning element includes a long tubular part which is formed into a tubular shape by folding back the cleaning element such that the non-woven fabric is located inside and thus forms the receiving space, and a brush part which forms a brush-like area in a region of the cleaning element other than the tubular part. Further, the fiber bundle disposed on an outer surface of the tubular part includes a fiber extending region in which a plurality of fibers extend parallel in a predetermined direction and the fiber extending region forms a second cleaning area other than the brush part. 
     With such a construction, in the cleaning element, in addition to the brush part, the fiber bundle which is disposed on the outer surface of the tubular part can also be provided with a cleaning function, so that the cleaning effect can be enhanced. Specifically, the cleaning tool of this invention has the cleaning element which is rationally configured to have the tubular part having not only an inherent function of receiving the holding part for holding the cleaning element but an additional cleaning function. 
     In the cleaning tool, the extending directions of the holding part, the grip part and the tubular part may generally coincide with each other. Further, in the fiber extending region of the cleaning element, a plurality of fibers may extend parallel in a direction transverse to the extending direction of the tubular part. 
     With this construction, when performing the cleaning operation, dirt attached or stuck to the surface to be cleaned can be efficiently scrubbed or scraped away by moving the fiber extending region in contact with the surface to be cleaned and along the extending direction of the tubular part. 
     In the cleaning tool, the fibers extending in the fiber extending region of the cleaning element may contain brush-like fibers forming the cleaning area. 
     With this construction, the fiber bundle on the outer surface of the tubular part is provided with the same function as the brush-like part in the cleaning element, regions which can be used for cleaning operation can be increased. By forming the brush-like fibers over the entire fiber bundle on the outer surface of the tubular part, the function of sweeping away dirt and dust on the surface to be cleaned can be further enhanced. Further, by forming the brush-like fibers in the fiber bundle in part on the outer surface of the tubular part, the cleaning tool having higher versatility can be realized which also has the function of sweeping away with the brush-like fibers of the fiber bundle and the function of scrubbing away with fibers other than the brush-like fibers of the fiber bundle. 
     In the cleaning tool, the extending directions of the holding part, the grip part and the tubular part may generally coincide with each other. Further, the brush part of the cleaning element may extend from the long tubular part in a direction transverse to the extending direction of the tubular part. 
     With this construction, when the tubular part of the cleaning element is disposed horizontally, the brush part can be arranged to extend vertically downward from the tubular part. Therefore, the fibers of the brush part can be effectively used for cleaning, so that the action of sweeping away dirt and dust on the surface to be cleaned can be easily performed. 
     In the cleaning tool, the fiber bundle may face the side of the brush part of the cleaning element which faces the surface to be cleaned and the tubular part may be disposed on the face of the brush part which faces away from the surface to be cleaned. 
     With this construction, the cleaning tool is provided with the cleaning element in which the tubular part is disposed on the side of the brush part opposite to the surface to be cleaned. 
     In the cleaning tool, the long tubular part of the cleaning element may be bent at a predetermined point in its longitudinal direction into a U-shape such that two receiving spaces are formed in both end portions of the tubular part. By using the two receiving spaces as spaces for receiving two holding parts, a construction in which the holding parts do not easily come off the receiving spaces can be realized. Further, an upper surface of the U-shaped area may form the fiber extending region. With this construction, the fiber extending region of the tubular part can be increased in area per unit length, so that the cleaning effect can be increased. 
     With this construction, the cleaning tool can be provided with the cleaning element in which the long tubular part is U-shaped such that two receiving spaces for receiving the holding part are formed in both end portions of the tubular part and an upper surface of the U-shaped area forms the fiber extending region. 
     In the cleaning tool, the cleaning element may have a two-layer structure consisting of two layers of the fiber bundle and the non-woven fabric. 
     With this construction in which the cleaning element has a two-layer structure, the number of materials can be reduced, so that the cleaning tool can be provided with a rational construction which is reduced in manufacturing costs. 
     As described above, according to this invention, in a cleaning tool having a cleaning element for cleaning a surface to be cleaned, particularly a fiber bundle on the outer surface of a tubular part of the cleaning element includes a fiber extending region in which a plurality of fibers extend parallel in a predetermined direction, and the fiber extending region forms a second cleaning area other than the brush part. By provision of this construction, a cleaning element and a cleaning tool which have higher cleaning effect can be provided. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective view of a cleaning tool  10  according to this embodiment of the invention. 
         FIG. 2  is a sectional view taken along line A-A in  FIG. 1 . 
         FIG. 3  is a top view of a cleaning element  100  shown in  FIG. 2 . 
         FIG. 4  shows a manufacturing process of the cleaning element  100  in this embodiment. 
         FIG. 5  shows the manufacturing process of the cleaning element  100  in this embodiment. 
         FIG. 6  is a perspective view showing a cleaning tool  20  having a holder  300  which includes a grip part  320  and two parallel holding parts  310  connected to the front end of the grip part  320 . 
         FIG. 7  is a perspective view of the cleaning element  100  formed by a different method from that of  FIG. 6  and having two receiving spaces  102   a ,  102   b  in the tubular part  101 . 
         FIG. 8  is a perspective view of the cleaning element  100  formed by a different method from that of  FIG. 6  and having two receiving spaces  102   a ,  102   b  in the tubular part  101 . 
         FIG. 9  shows the state of the cleaning tool  10  in this embodiment which is used in sweeping mode. 
         FIG. 10  shows the state of the cleaning tool  10  in this embodiment which is used in scrubbing mode. 
         FIG. 11  shows the state of the cleaning tool  10  in this embodiment which is used in scrubbing mode. 
         FIG. 12  is a plan view showing the cleaning element  100  which is subjected to a cutting process in order to be used in wiping mode. 
         FIG. 13  is a plan view showing the cleaning element  100  which is subjected to a cutting process in order to be used in wiping mode. 
         FIG. 14  shows the state of the cleaning tool  10  which has the cleaning element  100  shown in  FIG. 13  and is used in wiping mode. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     A representative embodiment of the present invention is now described with reference to the drawings. First, the structure of a cleaning tool  10  according to this embodiment is explained with reference to  FIGS. 1 to 3 . Surfaces to be cleaned with the cleaning tool  10  include surfaces to be cleaned (floors, walls, windows, ceilings, external walls, furniture, clothes, curtains, bedding, lighting, home electric appliances, etc.) inside and outside of houses, apartments, buildings, factories, vehicles, etc. and surfaces of human body parts to be cleaned. These surfaces to be cleaned may be either flat or curved, uneven or stepped or notched or otherwise irregular. 
       FIG. 1  shows the cleaning tool  10  according to this embodiment in perspective view.  FIG. 2  is a sectional view taken along line A-A in  FIG. 1 , and  FIG. 3  is a top view of a cleaning element  100  shown in  FIG. 2 . As shown in  FIG. 1 , the cleaning tool  10  comprises the cleaning element  100  and a holder  200 . 
     As shown in  FIGS. 1 and 2 , the cleaning element  100  in this embodiment is formed from a sheet-type fiber bundle  110  and a sheet-type non-woven fabric  120  laminated and joined together at bonding lines  140 ,  141 ,  142 ,  143 ,  144 ,  145 . The cleaning element  100  includes a tubular part  101  and a brush part  103 . The cleaning element  100  is a feature that corresponds to the “cleaning element” according to this invention. The tubular part  101  and the brush part  103  are features that correspond to the “tubular part” and the “brush part”, respectively, according to this invention. The tubular part  101  includes a hollow tubular receiving space  102  (also referred to as an “internal space”). The receiving space  102  is a feature that corresponds to the “receiving space” according to this invention. The brush part  103  forms a brush-like cleaning part in a region of the cleaning element other than the tubular part  101 . Both the tubular part  101  and the brush part  103  have the fiber bundle on the outer side (top) and the non-woven fabric  120  on the inner side. Further, in the cleaning element  100  in this embodiment, the fiber bundle  110  faces the side of the brush part  103  which faces the surface to be cleaned. The tubular part  101  is disposed on the face of the brush part  103  which faces away from the surface to be cleaned. 
     Further, in this embodiment, the brush part  103  extends vertically downward from the tubular part  101  when the holder  200  extends horizontally or a holding part  210  and a grip part  220  which are described below extend substantially horizontally. This horizontally extending state of the holder  200  coincides with the state of the holder  200  with the grip part (the grip part  220  described below) held by the user for cleaning operation. Therefore, the brush part  103  tends to extend downward, which allows full use of the fibers of the brush part  103  and is thus effective in sweeping away dirt and dust on the surface to be cleaned. 
     (Constriction of the Fiber Bundle  110 ) 
     The fiber bundle  110  is a single fiber structure formed by fibers, a fiber structure having fibers aligned in the length direction and/or the radial direction (twist yarn, spun yarn, yarn to which a plurality of filaments are partially connected), or an assembly of the fiber structures. The fiber bundle  110  partially includes thermoplastic fibers and can be fusion bonded. The fibers forming the fiber bundle  110  are elements of yarn, textile or the like and defined as being thin and flexible fibers having a substantially longer length compared with the thickness. Typically, a long continuous fiber is defined as a filament and a short fiber as a staple. The fiber bundle  110  is a feature that corresponds to the “fiber bundle” according to this invention. The fiber bundle  110  is typically formed of polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), nylon, rayon or the like. In practical use, an assembly of filaments formed by opening a tow is frequently used as the fiber bundle  110 . It is particularly preferable that the fiber bundle  110  comprises conjugated fibers having a core of polypropylene (PP) or polyethylene (PE) and a core covering sheath of polyethylene (PE). Further, it is preferable for the filaments of the fiber bundle  110  to have a fineness of 1 to 50 dtex, and more preferably 2 to 10 dtex. The individual fiber bundle may contain fibers of generally the same fineness or of different finenesses. Further, in order to enhance the sweeping function, it is preferred to use a fiber bundle including fibers having higher rigidity or fibers having higher fineness. 
     Fibers forming the fiber bundle  110  are regularly arranged parallel to each other on the outer side of the tubular part  101 . A fiber extending region in which the fiber bundle  110  extends is a feature that corresponds to the “fiber extending region” according to this invention. As shown in  FIG. 3 , the extending direction of the fibers is generally perpendicular to the extending direction of the tubular part  101  (the extending direction of the holding portion  210 ). It is only necessary for the extending direction of the fibers to be a direction in which the fibers are regularly arranged. The extending direction includes not only the direction generally perpendicular to the extending direction of the tubular part  101 , but a direction along the extending direction of the tubular part  101  and a direction inclined at a predetermined angle with respect to the extending direction of the tubular part  101 . 
     Further, flat yarns or split yarns may be employed as the fiber bundle  110 . The flat yarns are prepared by slitting a film into tapes and by stretching the tapes in the longitudinal direction. The split yarns are prepared by splitting a thermoplastic film resin in the direction perpendicular to the orientation direction of the resin so that the film is fibrillated and interconnected into a net shape. Alternatively, a non-woven fabric which is bulky and has low fiber density, such as a through-air bonded non-woven fabric, may be employed to form the fiber bundle  110 . 
     Further, preferably, the fiber bundle  110  may be formed by using crimped fibers. Here, the crimped fibers are fibers subjected to a predetermined crimping process. With the fibers being crimped, the fiber bundle becomes bulky, and dust can be easily captured by the crimped portions. This structure can be realized especially by using crimped fibers opened from a tow. 
     With provision of the fiber bundle  110  having the above-described construction, the cleaning element  100  in this embodiment can perform a higher cleaning function since dirt is entangled between the fibers of the fiber bundle  110  or on the crimped portions of the fibers during cleaning operation using the cleaning element  100 . 
     (Construction of the Non-Woven Fabric  120 ) 
     The non-woven fabric  120  has a sheet-like configuration formed by fixing or entangling fibers by mechanical, chemical or heat treatment. The non-woven fabric  120  partly includes thermoplastic fibers and thus can be fusion bonded. Further, the non-woven fabric  120  has a plurality of strips. The non-woven fabric  120  is a feature that corresponds to the “non-woven fabric” according to this embodiment. The non-woven fabric  120  may be manufactured by spun bonding, through-air bonding, thermal bonding, spun lacing, point bonding, melt blowing, stitch bonding, chemical bonding, needle punching or other similar processes. In order to enhance the sweeping function in cleaning operation, it is preferred to use a non-woven fabric having higher rigidity. The strips of the non-woven fabric  120  may have various shapes, such as zigzag and curved shapes. In order to enhance the cleaning function, preferably, the strips may have a zigzag shape which can easily trap dust. 
     Further, as an alternative to or in addition to the non-woven fabric, urethane, sponge, woven fabric, net, split cloth or other similar material may also be used in the form of strips. 
     With provision of the non-woven fabric  120  having the above-described construction, the cleaning element  100  in this embodiment can perform a higher cleaning function since dust is trapped between the strips or on the faces of the strips during cleaning operation using the cleaning element  100 . Further, the non-woven fabric  120  has higher rigidity than the fiber bundle  110  and thus can perform a function of preventing the fiber bundle  120  from being fixed or entangled with each other. If the non-woven fabric  120  is formed by using crimped fibers, the non-woven fabric  120  disposed on the outer surface of the tubular part  101  can also be provided with a cleaning function. 
     The holder  200  has a function of holding the cleaning element  100  having the above-described function and includes at least an elongate holding part  210  and an elongate grip part  220 . The holding part  210  is disposed on the front end of the grip part  220 . The holding part  210  is removably inserted into the receiving space  102  of the tubular part  101  of the cleaning element  100  and serves to hold the cleaning element  100 . In the embodiment shown in  FIG. 1 , the holding part  210  is configured as one rod-like or plate-like part. The grip part  220  is connected to and extends from the rear end of the holding part  210  and held by the user&#39;s hand during cleaning operation or replacement of the cleaning element. In this embodiment, the extending directions of the holding part  210  and the grip part  220  generally coincide with each other. Further, the holding part  210  and the grip part  220  may be formed separately and assembled together. Alternatively, they may be integrally formed. The user can replace the cleaning element  100  by removing the cleaning element  100  from the holding part  210  as necessary. The cleaning element  100  may be of disposable type designed for single use, disposable type designed for multiple use which can be used several times, while retaining dust which has been removed from the surface to be cleaned, on a brush part, or reusable type which can be reused by washing. 
     Further, in this embodiment, in order to prevent the holding part  210  inserted into the receiving space  102  from easily coming off during use, stretch materials  130  are mounted on the both ends of the receiving space  102  of the tubular part  101 . Each of the stretch materials  130  is non-woven fabric at least partly including thermoplastic fiber, or thermoplastic resin film, and is formed of materials having a stretching function, or of non-woven fabric containing a elastomer material, or of elastomer, urethane, rubber, etc. 
     The method of manufacturing the cleaning element  100  having the above construction is now described with reference to  FIGS. 4 and 5 .  FIGS. 4 and 5  show the process of manufacturing the cleaning element  100  according to this embodiment. In this manufacturing process, the cleaning element  100  shown in  FIG. 1  can be manufactured by performing the first bonding process, the folding process and the second bonding process in this order. 
     (First Bonding Process) 
     As shown in  FIG. 4 , in this embodiment, the fiber bundle  110  having the above described construction and the strip-like non-woven fabric  120  are laminated and joined together. Specifically, the fiber bundle  110  and the non-woven fabric  120  are first fusion bonded together at the bonding lines  140 ,  141 . Further, the fiber bundle  110  and the non-woven fabric  120  are fusion bonded in a pattern at the bonding line  142  on the portion of the fiber bundle  110  which is surrounded by the bonding lines  140 ,  141 . The bonding line  142  can also be designed to be parallel to the bonding lines  140 ,  141 . Subsequently, the both ends of the fiber bundle  110  and the non-woven fabric  120  are fusion bonded together at the bonding lines  143 ,  144 . As a result, a fiber sheet of a two-layer structure consisting of the fiber bundle  110  and the non-woven fabric  120  is formed. Further, the stretch materials  130  are bonded to the both ends of the non-woven fabric  120 . 
     Further, as an alternative to the bonding line  142 , a fusion-bonding face may be provided for surface fusion-bonding on the portion of the fiber bundle  110  which is surrounded by the bonding lines  140 ,  141 . With this construction, the inner wall of the receiving space  102  of the tubular part  101  can be increased in rigidity and thus in smoothness. As a result, the operation of inserting the holding part  210  of the holder  200  into the receiving space  102  can be smoothly performed. 
     (Folding Process) 
     Next, as shown in  FIG. 5 , the fiber sheet obtained by the first bonding process is folded back along the bonding lines  140 ,  141  in such a manner as to form a tubular shape and such that the non-woven fabric  120  is located inside. As a result, a folded fiber sheet of a two-layer structure consisting of the fiber bundle  110  and the non-woven fabric  120  is formed. 
     (Second Bonding Process) 
     Thereafter, the folded portions of the folded fiber sheet obtained by the folding process are fusion bonded together at the bonding line  145 . As a result, the cleaning element  100  as shown in  FIG. 1  is obtained having the hollow tubular part  101  with the closed circular receiving space  102  and the brush part  103  formed in a region of the cleaning element other than the tubular part  101 . Further, the bonding lines  140  to  145  may have a continuous linear or curved shape or a discontinuous linear or curved shape. 
     As described above, the cleaning element  100  of this embodiment is of a two-layer structure consisting of the fiber bundle  110  and the non-woven fabric  120 . Therefore, the number of parts and thus the manufacturing costs can be effectively reduced. 
     As for the construction of the holder  200 , other than the construction in which the holding part  210  is configured as one rod-like or plate-like part as shown in  FIG. 1 , the holder can have two or more holding parts.  FIG. 6  is a perspective view showing a cleaning tool  20  having a holder  300  which includes a grip part  320  and two parallel holding parts  310  connected to the front end of the grip part  320 . 
     When the holder  300  as shown in  FIG. 6  is used, two receiving spaces must be provided in the cleaning element  100 . Therefore, the tubular part  101  of the cleaning element  100  obtained in the above-described second bonding process is pressed at the top along the length of the tubular part down in the direction of the arrow in  FIG. 6 . Thus, the one tubular portion of the tubular part  101  is divided into two tubular portions and the pressed portion is bonded. In this manner, the cleaning element  100  can be provided with the tubular part  101  having two receiving spaces  102   a ,  102   b  as shown by solid lines in  FIG. 6 . The holding parts  310  (the “holding part” according to this invention) connected to the front end of the grip part  320  (the “grip part” according to this invention) are inserted into the receiving spaces  102   a ,  102   b  (the “receiving space” or the “two receiving spaces” according to this invention) of the cleaning element  100 . Thus, the cleaning tool  20  (the “cleaning tool” according to this invention) shown in  FIG. 6  is formed. Due to the increased number of the holding parts, the holder  300  having such a construction has an advantageous effect that the cleaning element  100  held by the holder  300  does not easily come off during use. 
     Further, as for the method of providing the two receiving spaces  102   a ,  102   b  in the tubular part  101 , as alternatives to the method of dividing the one tubular portion of the tubular part  101  into two tubular portions as shown in  FIG. 6 , different methods can also be used as shown in  FIGS. 7 and 8 .  FIGS. 7 and 8  are perspective views of the cleaning elements  100  formed by different methods from that of  FIG. 6  and having two receiving spaces  102   a ,  102   b  in the tubular part  101 . 
     In the method shown in  FIG. 7 , the cleaning element  100  as shown in  FIG. 1  is bent 180 degrees at a central region  105  so that the tubular part  101  is U-shaped. As a result, the both end portions of the tubular part  101  can be used as the receiving spaces  102   a ,  102   b . Further, in the method shown in  FIG. 8 , two cleaning elements  100  as shown in  FIG. 1  are provided and disposed in parallel. As a result, the receiving space of one of the cleaning elements  100  can be used as the receiving space  102   a , while the receiving space of the other cleaning element  100  can be used as the receiving space  102   b . The methods shown in  FIGS. 7 and 8 , like the method shown in  FIG. 6 , can achieve the effect that the cleaning element  100  held by the holder  300  does not easily come off during use. Further, by using the method shown in  FIG. 8 , the volume of the brush part  103  is further increased, so that the cleaning effect can be increased. 
     In the cleaning element  100  formed by the methods shown in  FIGS. 6 to 8 , in addition to the predetermined cleaning area in the form of the brush part  103 , the upper surface of the tubular part  101  forms a second cleaning area different from the brush part  103 . The upper surface of the tubular part  101  forms a fiber extending region of the fiber bundle  110  as described above. Particularly, in the tubular part  101  shown in  FIGS. 6 and 8 , the upper surface of the tubular part  101  is increased in area, so that the cleaning effect can be increased. Further, in the tubular part  101  shown in  FIG. 7 , the upper surface of the tubular part  101  is increased in area per unit length, so that the cleaning effect can be increased. 
     Although the cleaning element  100  in the above embodiment is described as having a two-layer structure consisting of the fiber bundle  110  and the non-woven fabric  120 , it can have a multilayer structure having another fiber layer in addition to the fiber bundle  110  and the non-woven fabric. For example, a three-layer structure can be used having the fiber bundle  110  and the non-woven fabrics  120  arranged on the both sides of the fiber bundle  110 . With such a construction, the fiber bundle  110  which can easily contain air between fibers is sandwiched between the non-woven fabrics  120 , so that the three layer can be fusion bonded while air inside the fiber bundle  110  is squeezed out as much as possible. Thus, the fusion bonding performance can be enhanced. 
     The cleaning tools  10 ,  20  having the above-described construction can be used in the same manner. Therefore, the usage of the cleaning tool  10  is explained here with reference to  FIGS. 9 to 11 . In this usage, at least three modes, or “sweeping mode”, “scrubbing mode” and “wiping mode”, can be used. 
     (Sweeping Mode) 
       FIG. 9  shows the state of the cleaning tool  10  in this embodiment which is used in sweeping mode. The sweeping mode is defined as a mode in which the brush part  102  is used as the cleaning area for cleaning the surface S to be cleaned. As shown in  FIG. 9 , in the sweeping mode, the holder  200  is horizontally placed generally in parallel to the surface S to be cleaned. In this state, the user holding the grip part  220  moves the hand back and forth or from side to side in order to sweep away or absorb dust or dirt on the surface S to be cleaned via the brush part  103 . At this time, the brush part  103  of the cleaning tool  10  in this embodiment extends perpendicularly to the extending direction of the surface to be cleaned, which allows full use of the fibers of the brush part  103 . Therefore, the cleaning tool  10  can smoothly perform the action of sweeping away dust or dirt on the surface S to be cleaned. 
     (Scrubbing Mode) 
       FIGS. 10 and 11  show the state of the cleaning tool  10  in this embodiment which is used in scrubbing mode. The scrubbing mode is defined as a mode in which the second cleaning area in the form of the tubular part  101  rather than the brush part  102  is used as the cleaning area for cleaning the surface S to be cleaned. As shown in  FIG. 10 , in the scrubbing mode, the holder  200  is turned upside down with respect to the cleaning element  100  and then tilted such that the front end is located in a lower position than the rear end (on the grip part  220  side). In this state, the user holding the grip part  220  moves the hand back and forth in order to scrub away (scrape away or grind) dirt attached or stuck to the surface S to be cleaned via a scrubbing part  101   a  on the upper surface of the tubular part  101 . 
     When the scrubbing part  101   a  gets dirty by the scrubbing movement of the tubular part  101 , as shown in  FIG. 1 , the holding part  210  of the holder  200  is slightly pulled out of the cleaning element  100  such that the scrubbing part  101   a  is displaced rearward from the front end. Thus, the scrubbing movement can be further continued. When the dirty area of the scrubbing part  101   a  is further widened, the holding part  210  of the holder  200  is completely pulled out from one end of the tubular part  101  of the cleaning element  100 . The holding part  210  is then inserted from the other end of the tubular part  101  and scrubbing movement is performed again in the same manner. In this manner, every corner of the outer surface of the tubular part  101  can be rationally used for cleaning operation. 
     Particularly, in this scrubbing mode, with the construction in which the fiber bundle  110  on the outer surface of the tubular part  101  is used to scrub away dirt, a higher cleaning effect can be obtained for the following reasons. 
     First, the fiber bundle  110  on the outer surface of the tubular part  101  has some rigidity and has a function of scrubbing tough dirt attached or stuck to the surface S to be cleaned. 
     Second, as explained by using  FIG. 3 , the fibers of the fiber bundle  110  on the outer surface of the tubular part  101  are regularly arranged generally perpendicularly to the extending direction of the tubular part  101  (the extending direction of the holding part  210 ). Therefore, by operating the cleaning tool  10  back and forth, dirt can be reliably scraped away with the fibers extending perpendicularly to the direction of operation. This is an advantageous effect which can be achieved because the fiber bundle  110  has the regularly arranged fibers. 
     Third, the fiber bundle  110  has larger space between the fibers compared with the non-woven fabric  120 . Therefore, scrubbed-away dirt can be introduced into this space and reliably caught there, and further a larger amount of dirt can be accumulated. 
     (Wiping Mode) 
     In wiping mode, the cleaning element  100  having the above-described construction which is further subjected to a cutting process is used.  FIGS. 12 and 13  are plan views showing the cleaning element  100  which is subjected to a cutting process in order to be used in wiping mode. In the cleaning element shown in  FIG. 12 , a plurality of cuts  112  (cut parts) are formed on the portion of the fiber bundle  110  which is surrounded by the bonding lines  140 ,  141  and the cuts  112  extend parallel to the bonding lines  140 ,  141 . Further, in the cleaning element shown in  FIG. 13 , bonding lines  146 ,  147  extending parallel to the bonding lines  140 ,  141  are formed on the portion of the fiber bundle  110  which is surrounded by the bonding lines  140 ,  141 . Further, a plurality of cuts  112  (cut parts) are formed on the portion of the fiber bundle  110  which is surrounded by the bonding lines  146 ,  147  and the cuts  112  extend parallel to the bonding lines  146 ,  147 . The cuts  112  can be formed by cutting with a cutter. Further, partially cut areas of the fiber bundle  110  are raised to form raised (brush-like) fibers. For this raising process, some methods can be used. For example, air is sprayed from an air nozzle onto the cut areas, or a mechanical load is applied to the cut areas. The raised fibers can be used to wipe off dust or dirt on the surface S to be cleaned. 
       FIG. 14  shows the state of the cleaning tool  10  which has the cleaning element  100  shown in  FIG. 13  and is used in wiping mode. As shown in  FIG. 14 , cuts (cuts  112  in  FIG. 13 ) are formed by partially cutting the portion of the fiber bundle  10  which is surrounded by the bonding lines  146 ,  147 . Further, the fibers of the cuts are raised and thus a relatively short, raised brush-like portion  114  is formed. The brush-like portion  114  is a feature that corresponds to the “brush-like fibers” according to this invention. The brush-like portion  114  performs a high dust trapping effect because the fiber bundle  10  itself has higher rigidity. By thus forming brush-like fibers in the fiber bundle  110  in part on the outer surface of the tubular part  101 , the cleaning element having higher versatility can be realized which also has the function of sweeping away with the brush-like fibers of the fiber bundle  110  and the function of scrubbing away with fibers other than the brush-like fibers of the fiber bundle  110 . Further, by forming brush-like fibers over the entire fiber bundle  110  on the outer surface of the tubular part  101 , the function of sweeping away dirt and dust on the surface to be cleaned can be further enhanced. 
     As described above, by using the cleaning element  100  in this embodiment, cleaning operation can be performed at least in three modes. In this embodiment, not only the brush part  103  but the tubular part  101  is provided with a function as a cleaning area. As a result, a rational cleaning element can be realized in which regions of the cleaning element  100  to be used for cleaning operation can be maximized. 
     Other Embodiments 
     The present invention is not limited to the embodiment as described above, but rather, may be added to, changed, replaced with alternatives or otherwise modified. For example, the following provisions can be made in application of this embodiment. 
     In the above embodiment, the brush part  103  of the cleaning element  100  is described as extending vertically downward from the tubular part  101  when the holder  200  extends horizontally. However, in this invention, various changes can be made in the extending direction of the brush part  103 . For example, the brush part  103  can be inclined a predetermined angle with respect to the extending direction of the tubular part  101 , or the brush part  103  can extend laterally from the both sides of the tubular part  101 .