TW202216032A - Brush roller - Google Patents

Abstract

The present application discloses a brush roller configured to scrape off dust while rolling. The brush roller includes: a shaft part that has an outer circumferential surface tapered toward the distal end; a holding body that is attached to the outer circumferential surface of the shaft part; and a brush body that is held by the holding body so as to extend spirally along an outer circumferential surface of the holding body.

Description

brush roll

The present invention relates to a brush roller configured to scrape off dust.

Various types of brush rollers have been developed that scrape off dust while rolling on the floor (refer to Japanese Patent Laid-Open No. 2011-188951). The brush roller of Japanese Patent Laid-Open No. 2011-188951 includes: a shaft portion; and a plurality of brush bodies protruding from the outer peripheral portion of the shaft portion in the radial direction of the shaft portion.

A helical groove extending helically is formed on the outer peripheral portion of the shaft portion. The brush body is fixed to the shaft portion along the helical groove to form a helical brush row.

By forming the spiral brush row, the movement of the dust in contact with the brush body in the axial direction of the shaft portion can be promoted. In Japanese Patent Laid-Open No. 2011-188951, the helical direction of the brush row is set so as to move the dust toward the center position in the axial direction of the shaft portion.

In view of various requirements for brush rollers, there may be a structure in which a helical brush body is held on the outer peripheral surface of a tapered cylindrical shaft portion that is tapered toward the tip. By forming the shaft portion into a tapered shape, the effect of moving the long dust (for example, hair) wrapped around the brush roller toward the front end of the shaft portion can be enhanced. Furthermore, by making the shaft portion into a cylindrical shape, the shaft portion can be reduced in weight as compared with a solid shaft structure.

However, it may be difficult to manufacture the structure to hold the brush body on the outer peripheral surface of the tapered cylindrical shaft portion. For example, in order to form a helical groove on the outer peripheral surface of a tapered cylindrical shaft portion following Japanese Patent Laid-Open No. 2011-188951, a mechanism for separating the mold portion forming the helical groove from the shaft portion is required. . If the mold part for forming the spiral groove is to be extracted in the axial direction of the shaft part, it is necessary to make the mold part rotate around the axis of the shaft part according to the shape of the spiral groove, and to match the tapered shape of the shaft part. displacement in the radial direction. Mechanisms like this for moving the mold sections complicate the construction of the forming machine.

An object of the present invention is to provide a brush roll which can be easily shaped by having a structure in which a helical brush body is held on the outer peripheral surface of a tapered cylindrical shaft portion.

The brush roller of one aspect of the present invention is configured to scrape off dust while rolling. The brush roller includes: a shaft portion having an outer peripheral surface tapered toward the front end; a holder attached to the outer peripheral surface of the shaft portion; and a brush body extending helically along the outer peripheral surface of the holder held by the aforementioned holder.

The above-described brush roller can be easily manufactured, and can hold the spiral brush body on the outer peripheral surface of the tapered cylindrical shaft portion.

The objects, features and advantages of the present invention will become more apparent from the following detailed description and accompanying drawings.

Form for carrying out the invention In the present embodiment, the brush rollers 131 and 132 are configured as a part of the suction tool 100 attached to the vacuum cleaner 101 . FIG. 1 is a schematic side view of the cleaner 101 to which the suction tool 100 is attached. FIG. 2 is a schematic development perspective view of the inhaler 100 . 1 and 2, the cleaner 101 and the suction tool 100 will be described.

As shown in FIG. 1 , the vacuum cleaner 101 includes: a cleaning main body 102 with a built-in suction fan (not shown) or a motor (not shown) driving the suction fan; and a hose 103 extending from the cleaning main body 102 to the inhaler 100 ; And the operation part 104, provided in the hose 103. The distal end portion of the hose 103 is configured to be connectable to the inhaler 100 . The operation part 104 is comprised so that the cleaning main body part 102 and the inhalation tool 100 may be operated by receiving operation of a user. The electrical wiring from the cleaning main body part 102 and the suction tool 100 to the operation part 104 is carried out along the hose 103 .

In order to obtain a wider suction area than the inner space of the hose 103 , the suction tool 100 is attached to the front end of the hose 103 . The inhaler 100 is configured to inhale while scraping off the dust on the floor.

In addition to the brush rollers 131 and 132 , the suction tool 100 includes a casing 120 configured to hold the brush rollers 131 and 132 and a drive mechanism (not shown) configured to drive the brush rollers 131 and 132 .

As shown in FIG. 2 , in order to obtain a wide suction space 110 in the width direction, the casing 120 has a shape wider in the width direction than in the front-rear direction. The casing 120 includes: a main body part 121 having a substantially C-shape open to the front in a plan view; and a cover member 122 configured to be attached to the main body part 121 .

The main body portion 121 includes: side portions 123 and 124, which are provided at positions separated from each other in the width direction (ie, the left-right direction) of the inhaler 100; , the main body part 102 side), and the side parts 123 and 124 are connected. The side parts 123, 124 and the rear part 125 have a hollow structure as a whole. Drive mechanisms are housed in the side portions 123 , 124 and the rear portion 125 .

The rear part 125 and the side parts 123 and 124 form the suction space 110 for suctioning the dust on the floor. That is, the suction space 110 is partitioned by the front end of the rear part 125 , the right end of the side part 123 , and the left end of the side part 124 . In this suction space 110 , brush rollers 131 and 132 are arranged, and the side portions 123 and 124 respectively support these brush rollers 131 and 132 . Specifically, bearings (not shown) for holding the brush rollers 131 and 132 are provided on the inner wall portions of the side portions 123 and 124 (that is, the wall portions facing the suction space 110 ).

The rear portion 125 is configured to be connectable to the hose 103 . A flow path (not shown) connecting the flow path formed by the hose 103 and the suction space 110 is formed in the rear portion 125 .

The cover member 122 is configured to block the suction space 110 from above. The left and right end portions of the cover member 122 are configured to be fixed to the side portions 123 and 124 in a state of being placed on the side portions 123 and 124 .

The brush rollers 131 and 132 are configured to scrape off dust while rolling on the floor surface in the suction space 110 . The brush roller 131 is cantilevered by the side portion 123 on the left side, and extends to the right from the side portion 123 in the suction space 110 . The brush roller 132 is supported by a cantilever by the side portion 124 on the right side, and is extended to the left from the side portion 124 in the suction space 110 . The front ends of the brush rollers 131 and 132 are separated from each other in the width direction of the suction tool 100 .

The structure of the brush roller 131 will be described with reference to FIGS. 2 to 6 . FIG. 3 is a schematic plan view of a part of the brush roll 131 . FIG. 4 is a schematic cross-sectional view of a part of the brush roll 131 in the axial direction of the brush roll 131 . FIG. 5 is a schematic development perspective view of a part of the brush roll 131 . FIG. 6 is a schematic cross-sectional view of a part of the brush roll 131 in a direction perpendicular to the axis of the brush roll 131 . In addition, the structure of the brush roll 132 is the same as that of the brush roll 131 . Therefore, the following description related to the brush roll 131 can be referred to the brush roll 132 .

As shown in FIG. 3 , the brush roller 131 has: a connecting shaft 250; a shaft part 210, which is externally embedded in the connecting shaft 250; a front end cap 240, which is mounted on the front end of the shaft part 210; on the shaft portion 210 .

The connecting shaft 250 is provided to transmit the driving force of the driving mechanism accommodated in the body portion 121 of the housing 120 to the shaft portion 210 . The base end portion of the connecting shaft 250 is disposed in the main body portion 121 in order to receive the driving force of the driving mechanism. A pulley (not shown) is attached to the base end portion of the connecting shaft 250 . The connecting shaft 250 is fitted into the bearing provided on the inner wall portion of the side portion 123 .

The distal end portion of the connecting shaft 250 is inserted into the shaft portion 210 in order to transmit the driving force of the drive mechanism to the shaft portion 210 . In order to prevent the idling of the connecting shaft 250 , knurling is applied to the outer peripheral surface of the front end portion of the connecting shaft 250 .

The shaft portion 210 has an outer peripheral surface tapered toward the front end, and the outer shape of the shaft portion 210 is substantially circular over the entire length in a cross-section at right angles to the axis of the shaft portion 210 .

The shaft portion 210 has: a shaft body 214 ; and an internal connection portion 270 , which is integrally formed with the shaft body 214 .

The shaft body 214 includes: a tapered cylindrical portion 212 extending in the axial direction of the shaft body 214 while gradually increasing in thickness from the front end of the shaft body 214 to the base end side; and a base end ring portion 211 provided on the tapered the base end side of the cylindrical portion 212 . The axial length of the tapered cylindrical portion 212 becomes longer than the axial length of the proximal end ring portion 211 . Although the tapered cylindrical portion 212 and the base end ring portion 211 have a tapered shape that tapers toward the front end of the shaft body 214 , the tapered angle of the base end ring portion 211 becomes smaller than that of the tapered cylindrical portion 212 . Small. That is, the outer peripheral surface of the base end ring portion 211 becomes closer to being parallel to the axis of the shaft portion 210 than the outer peripheral surface of the tapered cylindrical portion 212 .

As shown in FIG. 4 , the inner connecting portion 270 is provided for connecting the connecting shaft 250 to the shaft portion 210 , and is integrally formed with the conical cylindrical portion 212 in the tapered cylindrical portion 212 to connect with the connecting shaft 250 the front end (knurled part) of the . The internal connection portion 270 and the shaft portion 210 can also be formed by injecting resin in a state where the front end portion of the connection shaft 250 after knurling is disposed in a mold for forming these members.

A holding body 220 is fitted outside the shaft portion 210 . The holding body 220 is provided to hold the plurality of brush bodies 230 extending spirally, and as shown in FIG. 5 , is formed into a tapered cylindrical shape independently of the shaft portion 210 . The holding body 220 is mounted on the outer peripheral surface of the shaft portion 210 by being externally fitted to the shaft portion 210 . The holder 220 holds the plurality of brush bodies 230 on the outer peripheral surface of the shaft portion 210 in a state of being externally fitted to the shaft portion 210 .

The holding body 220 has a plurality of holding pieces 222 arranged on the outer peripheral surface of the shaft portion 210 so as to be adjacent to each other at intervals in the circumferential direction of the shaft portion 210 . Further, the holder 220 includes an annular distal end connecting portion 223 for connecting the distal ends of the holding pieces 222 and an annular base end connecting portion 224 for connecting the proximal ends of the holding pieces 222 .

The holder 220 is configured to have a tapered cylindrical shape tapered toward the front end in a state where the plurality of holding pieces 222 are arranged in the circumferential direction of the shaft portion 210 and attached to the outer peripheral surface of the shaft portion 210 . Each of these holding pieces 222 is a thin plate-shaped portion extending spirally. In other words, each of the plurality of holding pieces 222 has a shape in which a trapezoidal thin plate tapered toward the front end of the shaft portion 210 is spirally wound around the outer peripheral surface of the shaft portion 210 . The inner space 318 (refer to FIG. 5 ) of the holding body 220 surrounded by the plurality of holding pieces 222 arranged in the circumferential direction is complementary to the shaft portion 210 and is in a cross section at right angles to the axis of the holding body 220 It is circular and has a shape that tapers toward the tip.

Since the holding pieces 222 are arranged at intervals in the circumferential direction of the shaft portion 210, between adjacent holding pieces 222 (that is, between the side surfaces 291 of the holding pieces 222 facing each other in the circumferential direction) between) a helical groove 221 is formed. The helical groove 221 extends helically on the outer peripheral surface of the shaft portion 210 , and the brush body 230 is arranged along the helical groove 221 . The direction of the spiral groove 221 (more specifically, the shape of the holding piece 222 ) is set so that when the brush roller 131 rotates in the direction indicated by the arrow in FIG. direction sent.

As shown in FIG. 6 , the holding piece 222 has an inner peripheral portion 225 having an inner peripheral surface facing the outer peripheral surface of the shaft portion 210 , and an outer peripheral portion 226 opposite to the inner peripheral portion 225 in the radial direction of the shaft portion 210 . It is located on the outer side and is wider than the inner peripheral portion 225 . The inner peripheral portion 225 constitutes the inner peripheral surface of the holding piece 222 in surface contact with the outer peripheral surface of the shaft portion 210 , while the outer peripheral portion 226 constitutes the inner peripheral surface of the holding piece 222 .

The side surface 291 of the holding piece 222 is constituted by the side surface in the side edge portion 292 of the outer peripheral portion 226 and the side edge surface 229 of the inner peripheral portion 225 . Both side edge portions 292 of the outer peripheral portion 226 protrude in the width direction of the helical groove 221 with respect to both side edge surfaces 229 of the inner peripheral portion 225 . That is, the both side edge portions 292 of the outer peripheral portion 226 are configured as protrusions protruding from the both side edge portions 229 of the inner peripheral portion 225 . The side edge portion 292 of the outer peripheral portion 226 and the side edge surface 229 of the inner peripheral portion 225 are configured to hold the brush body 230 .

The side surfaces in the side edge portions 292 of the outer peripheral portions 226 of the adjacent holding pieces 222 face each other in the width direction of the spiral groove 221 . Likewise, the side edge surfaces 229 of the inner peripheral portions 225 of the adjacent holding pieces 222 face each other in the width direction of the helical grooves 221 . The side edge surfaces 229 of the inner peripheral portions 225 of the adjacent holding pieces 222 form portions on the inner peripheral side of the helical grooves 221 , and the helical grooves 221 are widened in the portions on the inner peripheral side. The side surface in the side edge part 292 of the outer peripheral part 226 of the adjacent holding piece 222 forms the part on the outer peripheral side of the helical groove 221, and the helical groove 221 becomes narrow in the part on the outer peripheral side. By causing a part of the shaft portion 230 to be sandwiched between the side edge portion 292 of the outer peripheral portion 226 of the adjacent holding piece 222 and the outer peripheral surface of the shaft portion 210 in the radial direction of the shaft portion 210, the brush body 230 can be easily removed. It can be held on the outer peripheral surface of the shaft portion 210 .

The inner peripheral portion 225 is fixed to the outer peripheral surface of the shaft portion 210 covering the entire longitudinal direction of the holding piece 222 so as to maintain a state of surface contact even if the side edge portion 292 of the outer peripheral portion 226 receives the following external force. The external force is an external force acting in a direction away from the outer peripheral surface of the shaft portion 210 . For example, the inner peripheral portion 225 may be bonded to the outer peripheral surface of the shaft portion 210 by an adhesive, or may be ultrasonically welded to the outer peripheral surface of the shaft portion 210 .

The front end portions of the plurality of holding pieces 222 are connected to the annular front end connecting portion 223 . The proximal end portions of the plurality of holding pieces 222 are connected to the annular proximal end connecting portion 224 . Therefore, the interval between the adjacent holding pieces 222 is maintained by the distal end connecting portion 223 on the distal end side, and is maintained by the proximal end connecting portion 224 on the proximal end side. Therefore, the width of the spiral groove 221 is maintained over the entire length. The spiral groove 221 communicates with the inner space 318 of the holder 220 between the distal end connecting portion 223 and the proximal end connecting portion 224 . Since the plurality of holding pieces 222 are connected to the distal end connecting portion 223 and the proximal end connecting portion 224, the holding body 220 is configured as a single tapered cylindrical body.

The distal ends of the plurality of holding pieces 222 are connected to the outer peripheral edge of the annular distal end connecting portion 223 . That is, the outer peripheral surface of the front end connecting portion 223 is connected to the inner peripheral surface of the plurality of holding pieces 222 , and the front end portion of the spiral groove 221 is located on the outer peripheral edge of the front end connecting portion 223 . Therefore, the front end portion of the spiral groove 221 can be used as an insertion port of the brush body 230 .

Since the proximal end portions of the plurality of holding pieces 222 are connected to the inner peripheral edge of the annular proximal end connecting portion 224, the proximal end portion of the spiral groove 221 becomes a recessed portion 227 whose outer surface is closed (see FIG. 5 ). That is, a plurality of recessed portions 227 are formed along the inner peripheral edge of the proximal end connecting portion 224 at intervals. The recesses 227 can be utilized in the extraction of the mold portion (the helical portion 282 shown in FIG. 8 ) for forming the helical groove 221 .

The concave portion 227 can also be used to prevent the relative rotation of the shaft portion 210 by the holding body 220 . That is, as shown in FIG. 5 , in order to prevent relative rotation between the holder 220 and the shaft portion 210 , a plurality of convex portions 260 are protruded from the outer peripheral surface of the base end ring portion 211 of the shaft portion 210 to The plurality of recesses 227 are engaged with each other. The convex portions 260 have shapes complementary to the plurality of concave portions 227 , and are arranged at intervals in the circumferential direction of the shaft portion 210 according to the positions of the concave portions 227 . When the holding body 220 is fitted to the shaft portion 210 , the convex portion 260 is fitted into the concave portion 227 .

Each of the plurality of brush bodies 230 includes: an elongated rectangular bottom band 231 configured to be inserted into the spiral groove 221 ; and a plurality of bristles 232 embedded in the bottom band 231 . The bottom tape 231 is used for the portion held by the holding body 220 . The plurality of bristles 232 are provided for scraping off dust.

The bottom tape 231 has a width substantially equal to the width between the side edge surfaces 229 of the inner peripheral portions 225 of the adjacent holding pieces 222 , and is arranged in the space between the side edge surfaces 229 . The bottom tape 231 is wider than the space between the side edge portions 292 of the outer peripheral portions 226 of the adjacent holding pieces 222 . Therefore, when the bottom band 231 is arranged in the wide space in the spiral groove 221 , the side edges 233 of the bottom band 231 will be connected by the side edges 292 of the outer peripheral portion 226 of the adjacent holding pieces 222 and the shaft portion 210 . The outer peripheral surface is sandwiched in the radial direction of the shaft portion 210 .

The bottom band 231 is flexible enough to be bent and deformed along the helical groove 221 when inserted from the front end portion of the helical groove 221 , and rigid enough to maintain the state of being caught on the side edge 292 of the outer peripheral portion 226 .

The plurality of bristles 232 are implanted and arranged in the longitudinal direction of the bottom belt 231 in the central area of the bottom belt 231 in the width direction (that is, the area between the edge portions 233 on both sides), and are formed on the bottom belt 231. A brush column extending in the long-side direction. When the brush bodies 230 are inserted into the helical grooves 221 , the brush rows protrude from the spaces between the side edges 292 of the outer peripheral portions 226 of the adjacent holding pieces 222 (ie, the narrow portions of the helical grooves 221 ).

When the brush body 230 is inserted into the spiral groove 221 from the front end of the spiral groove 221 until the brush row abuts the base end connecting portion 224, the brush row of the brush body 230 spirally extends on the outer peripheral surface of the holder 220. In the state, it is held by the holding body 220 . At this time, since the brush row is locked on the base end connecting portion 224 , the displacement of the brush body 230 in the base end direction can be prevented by the base end connecting portion 224 . On the other hand, in order to prevent displacement of the brush body 230 in the distal direction, a distal end cap 240 is provided.

The opening on the front end side of the spiral groove 221 can be blocked by the front end cap 240 . That is, the front end cap 240 includes: a disc-shaped pressing plate 241 having a diameter such as to block the opening; and an insertion portion 242 inserted into the shaft through the opening of the annular front end connecting portion 223 of the holder 220 The front end portion of the rod portion 210 . Since the pressing plate 241 blocks the opening on the front end side of the spiral groove 221, the front end of the bottom band 231 is caught on the pressing plate 241, and the displacement of the brush body 230 in the front end direction can be prevented.

The operation of the suction tool 100 and the vacuum cleaner 101 will be described below.

When the operation part 104 is operated, the cleaner 101 is actuated, and the suction force acts on the suction space 110 through the hose 103 and the flow path formed in the rear part 125 of the suction tool 100 . As a result, the dust on the floor surface flows into the suction space 110 through the downward opening of the suction space 110 . After that, the dust is collected into the vacuum cleaner 101 through the flow path of the rear part 125 and the hose 103 .

During this period, the driving mechanism built in the inhaler 100 is activated, and the driving force of the driving mechanism is transmitted to the shaft portion 210 , the holding body 220 and the plurality of brush bodies 230 through the connecting shaft 250 and the internal connecting portion 270 . At this time, the brush body 230 scrapes off the dust on the floor while rolling on the floor.

In the above-described embodiment, the taper angle of the base end ring portion 211 of the shaft portion 210 is smaller than the taper angle of the tapered cylindrical portion 212 on the distal side, and the outer peripheral surface of the base end ring portion 211 is relatively The shaft of the shaft portion 210 is in a nearly parallel state. Therefore, the outer diameter of the base end of the shaft portion 210 is reduced in comparison with the tapered tube extending while maintaining the tapered angle of the tapered tube portion 212 . Therefore, the enlargement of the size of the brush rolls 131 and 132 in the radial direction can be suppressed, and further, the enlargement of the casing 120 to which the brush rolls 131 and 132 are attached can be suppressed.

The helical direction of the spiral groove 221 in which the brush body 230 is arranged is set as described above so that when the brush rollers 131 and 132 are rotated in the directions indicated by the arrows in FIG. 2 , dust is sent out in the distal direction. Therefore, the brush body 230 can promote the movement of the dust in the front end direction of the brush body 230 (that is, the direction toward the center position in the width direction of the suction space 110 ).

When the brush rollers 131 and 132 scrape off the dust on the floor surface, the long dust (for example, hair) may be wound around the brush rollers 131 and 132 (see FIG. 7 ). Since the brush rollers 131 and 132 have tapered shapes that taper toward the front ends, the component force of the winding force of the long dust tends to be directed toward the front ends of the brush rollers 131 and 132 . Therefore, the long dust wound around the brush rollers 131 and 132 can be moved toward the front ends of the brush rollers 131 and 132 .

Since the spiral grooves 221 on which the brush bodies 230 are arranged are formed at intervals in the circumferential direction of the brush rolls 131 and 132 , the brush row formed by the plurality of bristles 232 is also formed in the circumferential direction of the brush rolls 131 and 132 . formed at intervals. Since the bristles 232 are not provided to cover the entire circumference of the brush rollers 131 and 132, the load on the drive mechanism does not become too large.

Although the shaft portion 210 and the holder 220 are formed independently of each other, since the concave portion 227 of the holder 220 is engaged with the convex portion 260 protruding from the outer peripheral surface of the shaft portion 210, the shaft portion 210 and the holder can be secured. 220's one-piece rotation.

Since the shaft portion 210 is formed independently of the holder 220 , the forming machine used for forming the shaft portion 210 may not have a mechanism for forming the spiral groove 221 . Therefore, the forming machine for forming the shaft portion 210 may not have an excessively complicated structure.

The helical groove 221 of the holding body 220 is connected to the inner space 318 of the holding body 220 so as to cover the section between the distal end connecting portion 223 and the proximal end connecting portion 224 . In this case, the helical groove 221 and the inner surface of the holding body 220 can be formed using the punch 280 shown in FIG. 8 .

As shown in FIG. 8 , the punch 280 has: a truncated cone-shaped body portion 281 having substantially the same shape as the outer shape of the shaft portion 210 ; The body portion 281 is a portion where the inner surface of the holder 220 is formed, and the spiral portion 282 is a portion where the spiral groove 221 is formed.

The holder 220 can be formed by injecting resin into a cavity between the punches 280 in a state where the punch 280 is inserted into a die (not shown) that shapes the outer surface of the holder 220 . After the holding body 220 is formed, the punch 280 is withdrawn from the female die forming the outer surface of the holding body 220 . After that, the holder 220 can be separated from the punch 280 by pulling out the holder 220 from the punch 280 while relatively rotating around the axis of the punch 280 . Since the spiral portion 282 is not provided in the female mold, the problem that the holder 220 is stuck in the spiral portion 282 and remains in the female mold is unlikely to occur.

After the holder 220 and the shaft portion 210 are formed, the holder 220 and the shaft portion 210 are fitted. After that, the bottom band 231 of the brush body 230 is inserted into the spiral groove 221 . Since the bottom band 231 has flexibility, the brush body 230 can be inserted up to the base end connecting portion 224 while being bent along the spiral groove 221 . At this time, both side edge portions 233 of the bottom band 231 are sandwiched in the radial direction of the shaft portion 210 by the side edges 292 of the outer peripheral portion 226 of the adjacent holding pieces 222 and the outer peripheral surface of the shaft portion 210 . . Therefore, the brush body 230 is held on the outer peripheral surface of the shaft portion 210 by the holding body 220 in a state in which the brush body 230 is spirally extended.

At this time, since the brush row formed by the plurality of bristles 232 protrudes from the spiral groove 221, it hits the base end connecting portion 224, and the movement of the brush body 230 to the base end side can be prevented. After that, by attaching the front end cap 240 to the front ends of the holder 220 and the shaft portion 210 , the movement of the brush body 230 to the front end side can also be prevented.

When the bristles 232 rub against the floor surface, the bristles 232 receive external force from the floor surface. In addition, the force is transmitted to the base band 231 implanted with the bristles 232 . In addition, forces sometimes act to tilt the bottom strap 231 about the axis of the bottom strap 231 . In this case, one of the side edge portions 233 of the bottom tape 231 is crimped to the side edge portion 292 of the outer peripheral portion 226 of the holding piece 222 . At this time, since the inner peripheral portion 225 of the holding piece 222 is fixed to the outer peripheral surface of the shaft portion 210 , the side edge portion 292 of the outer peripheral portion 226 of the holding piece 222 does not roll up from the outer peripheral surface of the shaft portion 210 . That is, the side edge portion 233 of the bottom tape 231 can be maintained to be sandwiched by the outer peripheral surface of the shaft portion 210 and the outer peripheral portion 226 of the holding piece 222 , and the bottom tape 231 can be prevented from being detached from the spiral groove 221 .

In the above-described embodiment, although the holding body 220 is constituted by using six holding pieces 222 , the holding body 220 may be formed by two or more holding pieces 222 .

In the above-mentioned embodiment, the brush body 230 is arranged in the spiral groove 221 . As an alternative, the brush body 230 may also be fixed to the outer peripheral surface of the holding body 220 by an adhesive or the like.

Regarding the above-described embodiment, the holding body 220 has a tubular structure in which a plurality of holding pieces 222 are integrated by the distal end connecting portion 223 and the proximal end connecting portion 224 . That is, in the above-described embodiment, the plurality of holding pieces 222 may be integrally attached to the outer peripheral surface of the shaft portion 210 . Alternatively, the distal end connecting portion 223 and the proximal end connecting portion 224 may be omitted, and the holding pieces 222 may be individually attached to the outer peripheral surface of the shaft portion 210 (see FIG. 9 ).

The shaft portion 210 shown in FIG. 9 is formed into a tapered cylindrical shape tapered toward the front end at a certain taper angle. A plurality of engaging recesses 213 are formed on the outer peripheral surface of the shaft portion 210 according to the arrangement positions of the plurality of holding pieces 222 . These engaging recesses 213 are used for attachment of the plurality of holding pieces 222 .

The plurality of holding pieces 222 are not connected to each other, and each of the plurality of holding pieces 222 is formed into a spiral plate shape elongated in the axial direction of the shaft portion 210 . The holding pieces 222 are arranged in a state of being arranged at intervals in the circumferential direction of the shaft portion 210 , and have a tapered cylindrical shape tapered toward the front end, and are arranged along the outer peripheral surface of the shaft portion 210 . extending spirally.

The holding piece 222 has an engaging convex portion 228 protruding from the inner surface of the holding piece 222 (that is, the surface abutting on the outer peripheral surface of the shaft portion 210 ). The engaging convex portion 228 is configured to be capable of engaging with the engaging concave portion 213 of the shaft portion 210 .

The shape of the side surface 291 of the holding piece 222 is the same as that shown in FIG. 4 and FIG. 6 , and when the holding piece 222 is mounted on the outer peripheral surface of the shaft portion 210 at intervals, between the side surfaces 291 of the adjacent holding pieces 222 A helical groove 221 is formed therebetween (see FIG. 5 ).

The plurality of holding pieces 222 may have a tapered cylindrical shape after being attached to the outer peripheral surface of the shaft portion 210 , and each of the holding pieces 222 has a plate shape at the time of molding. Therefore, the holding piece 222 can be easily shaped.

When the divided structure of the holding piece 222 as shown in FIG. 9 is adopted, since the forming of the holding piece 222 becomes easy, the helical groove 221 may be formed on the outer surface of the holding piece 222 (see FIG. 10 ). In this case, the plurality of holding pieces 222 may be arranged adjacent to each other in the circumferential direction of the shaft portion 210 .

The spiral groove 221 has the same shape as the spiral groove 221 shown in FIGS. 3 and 5 . That is, the helical groove 221 is extended in a helical shape. In addition, in the cross section at right angles to the axis of the shaft portion 210, the helical groove 221 is configured to form a narrow groove width in the vicinity of the outer surface of the holding piece 222, and the shaft is formed at a portion of the shaft relative to the narrow groove width. A wide groove width is formed on the portion 210 side.

As long as the spiral grooves 221 are formed in this way, when the bottom band 231 of the brush body 230 is inserted into a wide space, the side edges 233 of the bottom band 231 are caught in the spiral grooves 221 by the holding pieces 222 . That is, the brush body 230 can be held by the holding piece 222 .

The holding body 220 of FIGS. 9 and 10 has a structure capable of being divided into holding pieces 222 arranged in a line in the circumferential direction of the shaft portion 210 (that is, a divided structure in the circumferential direction). Alternatively, the holding body 220 may have a structure in which the shaft portion 210 is divided in the axial direction (see FIG. 11 ).

The holding body 220 shown in FIG. 11 has holding cylinders 311 and 312 and a base end cylinder 313 . The holding cylinders 311 and 312 and the base end cylinder 313 are configured to be externally fitted to the shaft portion 210 shown in FIG. 5 . That is, the holding cylinders 311 and 312 and the base end cylinder 313 are externally fitted to the shaft portion 210 in a state of being connected in the axial direction of the shaft portion 210 .

The base end cylinder 313 has a substantially cylindrical shape. On the other hand, the holding cylinders 311 and 312 are formed in a tapered cylinder shape tapered toward the front end. The holding cylinders 311 and 312 are configured so that there is no drop between the outer peripheral surface and the inner peripheral surface of the holding cylinders, and when the holding cylinders are connected and fitted to the shaft portion 210, they form a tapered shape as a whole. of the cylinder.

A plurality of linear grooves 314 to 316 are formed on the outer peripheral surfaces of the holding cylinders 311 , 312 and the base end cylinder 313 . The plurality of linear grooves 314 are formed at intervals in the circumferential direction of the holding cylinder 311 . The plurality of linear grooves 315 are formed at intervals in the circumferential direction of the holding cylinder 312 . The plurality of linear grooves 315 are formed at intervals in the circumferential direction of the base end cylinder 313 . The straight grooves 314 to 316 have the same shape as the helical groove 221 shown in FIG. 10 in cross section at right angles to the extending direction of the straight grooves 314 to 316 .

Although the straight grooves 314 to 316 are linearly extended, these extending angles are different from each other. Specifically, the linear grooves 314 to 316 are configured to be connected in a spiral shape when the holding tubes 311 and 312 and the base end tube 313 are connected in the axial direction of the shaft portion 210 . Although these straight grooves 314 to 316 form curved groove spaces between the holding cylinders 311 and 312 and between the holding cylinder 312 and the base end cylinder 313, since the bottom band 231 of the brush body 230 is flexible, it can be The curved groove portion 317 is inserted. Therefore, the brush bodies 230 are arranged along the linear grooves 314 to 316 in a state of being helically connected, and are held by the holding cylinders 311 and 312 and the base end cylinder 313 .

Since the straight grooves 314 to 316 are linearly extended, the mold portion (not shown) for forming the straight grooves 314 to 316 when the holding cylinders 311 and 312 and the base end cylinder 313 are formed can be formed in the straight grooves 314 to 316 Pull out straight in the extension setting direction of . Therefore, the holding cylinders 311 and 312 and the base end cylinder 313 can be easily formed.

Since the base end cylinder 313 has a substantially cylindrical shape rather than a tapered cylinder shape, even if it is integrally formed with the shaft portion 210 , the molding machine for forming the base end cylinder 313 and the shaft portion 210 is not excessively complicated. . Therefore, the base end cylinder 313 may be integrally formed with the shaft portion 210 .

Instead of the base end cylinder 313, an additional holding cylinder may be used instead. In this case, the additional holding cylinder is configured so that a drop does not occur on the holding cylinder 312 on the inner peripheral surface and the outer peripheral surface. When the additional holding cylinders are provided in connection with the holding cylinders 311 and 312 and are fitted to the shaft portion 210, the holding cylinders may form a tapered cylindrical body as a whole.

The shaft portion 210 may be configured such that the holding cylinders 311 and 312 and the base end cylinder 313 are positioned in the circumferential direction at positions where the linear grooves 314 to 316 are connected helically. For example, the shaft portion 210 may also have a cross-sectional shape such as a spline shaft. In this case, the holding cylinders 311 and 312 and the base end cylinder 313 only need to have an inner peripheral shape complementary to the shaft portion 210 .

In the above-described embodiment, the holder 220 is a resin molded product. As an alternative, as shown in FIG. 12 , the holding body 220 may also be formed of a sheet-like material formed in a substantially fan shape, so as to be wound around the outer peripheral surface of the shaft portion 210 . The sheet material has flexibility such as being deformable from a flat state to a curved shape wound around the outer peripheral surface of the shaft portion 210 . The brush body 230 can be formed by implanting a plurality of bristles 232 in a strip shape on the holding body 220 in the flat state. The region in which the plurality of bristles 232 are implanted and installed may be defined so as to obtain a spirally extending brush row when the holder 220 is wound around the outer peripheral surface of the shaft portion 210 .

When the holding body 220 is in a flat state, the bristles 232 can be easily implanted in the holding body 220 . Therefore, the holding body 220 in which the state of the brush body 230 has been held can be easily formed. The brush roller 131 can be easily fabricated by wrapping the holder 220 around the outer peripheral surface of the shaft portion 210 .

The above-described embodiment mainly includes the following configurations.

The brush roller of one layer of the above-described embodiment is configured to scrape off dust while rolling. The brush roller includes: a shaft portion having an outer peripheral surface tapered toward the front end; a holder attached to the outer peripheral surface of the shaft portion; and a brush body extending helically along the outer peripheral surface of the holder held by the aforementioned holder.

According to the above-described configuration, the holder for holding the brush body is configured independently of the shaft portion and then attached to the shaft portion. Therefore, it is not necessary to provide a structure for holding the brush body on the shaft portion. Therefore, the complication of the mold for forming the shaft portion can be suppressed.

Regarding the above configuration, the holding body may include a pair of holding pieces attached to the outer peripheral surface of the shaft portion so as to be adjacent to each other with an interval therebetween in the circumferential direction of the shaft portion. In the pair of holding pieces, a spiral groove extending helically may be formed on one pair of side surfaces facing each other in the circumferential direction. The brush body may also be held between the pair of side surfaces.

According to the above configuration, when a pair of holding pieces are attached to the outer peripheral surface of the shaft portion at intervals in the circumferential direction, a spiral groove is formed between the holding pieces on the outer peripheral surface of the shaft portion. The brush body is arranged along the spiral groove and extends spirally. In this state, the brush body is held on the outer peripheral surface of the shaft portion by the side surfaces of the pair of holding pieces.

Regarding the above configuration, the brush body may further include: a bottom band; and a plurality of bristles, which are implanted and arranged in the longitudinal direction of the bottom band. The pair of holding pieces may each have an outer peripheral portion formed in the helical groove on the outer peripheral side, and an inner peripheral portion formed in the helical groove with an inner peripheral portion wider than the outer peripheral portion. The bottom band may be wider than the portion on the outer peripheral side of the helical groove, and may be arranged between the inner peripheral portions. The plurality of bristles may also protrude from the helical grooves through the gaps between the outer peripheral portions.

According to the above configuration, the portion on the inner peripheral side formed by the inner peripheral portion of the pair of holding pieces is wider than the portion on the outer peripheral side formed by the outer peripheral portion of the pair of holding pieces. Therefore, both side edge portions of the bottom band located on both sides in the width direction of the brush body are sandwiched by the outer peripheral portion and the outer peripheral surface of the shaft portion. As a result, the brush portion can be held on the shaft portion by the holding portion. On the other hand, since the plurality of bristles protrude from the spiral groove through the gaps in the outer peripheral portion, when the brush roller rolls, dust can be scraped off.

With regard to the above configuration, the inner peripheral portion of the pair of holding pieces may be fixed to the shaft in a state in which the entire longitudinal direction of the pair of holding pieces is in surface contact with the outer peripheral surface of the shaft portion the aforementioned outer peripheral surface of the part.

According to the above configuration, since the inner peripheral portion of the pair of holding pieces is fixed to the outer peripheral surface of the shaft portion in a state in which the entire longitudinal direction of the pair of holding pieces is in surface contact with the outer peripheral surface of the shaft portion, it is possible to suppress the Deformation of the pair of holding pieces such as the expansion of the width of the helical groove. Therefore, the bottom tape can also be prevented from being detached from the spiral groove.

In the above configuration, the holding body may include a distal end connecting portion connecting the leading end portions of the pair of holding pieces to each other, and a proximal end connecting portion connecting the base end portions of the pair of holding pieces to each other.

According to the above configuration, since the pair of holding pieces are connected to each other by the distal end connecting portion and the proximal end connecting portion, the holding body can be handled as a single member. In addition, since the distal end connecting portion and the proximal end connecting portion maintain the distance between these members on the distal end side and the proximal end side of the pair of holding pieces, it is possible to maintain the width of the helical groove while covering the entire length of the helical groove. The body is mounted on the outer peripheral surface of the shaft portion.

Regarding the above-mentioned configuration, the holding body may have a tapered cylindrical shape, and may have a circular inner space in a cross section orthogonal to the axis of the shaft portion. The helical groove may be formed so as to cover the section between the front end connecting portion and the proximal end connecting portion and communicate with the inner space.

According to the above configuration, when the holder is formed in the tapered cylindrical shape, the helical groove can be formed so as to cover the section between the distal end connecting portion and the proximal end connecting portion and communicate with the tapered cylindrical inner space. In this case, the outer surface of the holder can be formed by a female die, and the helical groove and the inner peripheral surface of the holder can be formed by a punch. The punch may be constituted by a body portion forming the inner space of the holding body and a helical portion, the helical portion protruding helically from the outer peripheral surface of the body portion to form a helical groove. Since the body portion has a shape complementary to the inner space of the holding body, it has a circular cross-section in a cross-section orthogonal to the axis of the shaft portion, and has a shape that is rotatable within the holding body around the axis of the body portion . Therefore, the punch can be pulled out from the holder in the axial direction of the holder while the body portion is rotated around the axis of the shaft portion in accordance with the helical shape of the helical portion.

Regarding the above-mentioned configuration, the brush roller may further include a convex portion protruding from the outer peripheral surface of the shaft portion. The said holding body may be formed with the recessed part which engages with the said convex part.

According to the above configuration, the relative rotation of the shaft portion to the holder can be prevented by the engagement of the convex portion and the concave portion.

Regarding the above configuration, the shaft portion may be configured such that the taper angle on the proximal end side becomes smaller than the taper angle on the distal end side.

According to the above configuration, the taper angle of the shaft portion on the base end side becomes relatively small, and in the portion where the taper angle becomes small, the outer peripheral surface of the brush roll is nearly parallel to the axis of the brush roll. In this case, the diameter of the base end side of the brush roller is reduced compared to the cylindrical body extending toward the base end side while maintaining the taper angle of the distal end side, thereby suppressing an increase in the size of the brush roller in the radial direction.

With regard to the above configuration, the pair of holding pieces may be attached to the outer peripheral surface of the shaft portion without being coupled to each other.

According to the above configuration, since the pair of holding pieces are not connected to each other, the holding pieces can be individually formed as plate-shaped members that can be arranged along the outer peripheral surface of the shaft portion.

Regarding the above configuration, the brush roll may further include a plurality of brush bodies including the above-mentioned brush bodies. The aforementioned holding body may include a plurality of holding pieces formed into a spiral plate shape. The plurality of holding pieces may be arranged in the circumferential direction of the shaft portion without being connected to each other, and may be attached to the outer peripheral surface of the shaft portion. A helical groove extending helically may be formed on the outer surface of each of the plurality of holding pieces. The plurality of brush bodies may be arranged along the helical grooves, and each may be held by the plurality of holding pieces.

According to the above configuration, since the plurality of holding pieces are not connected to each other, they can be formed as a spiral plate-shaped member. Compared with the case of forming the helical groove on the outer peripheral surface of the tapered cylindrical shaft portion, it is easier to form the helical groove in such a helical plate-shaped member.

When a plurality of helical plate-shaped holding pieces are arranged in the circumferential direction of the shaft portion and mounted on the outer peripheral surface of the shaft portion, and each of the plurality of brush bodies is arranged along the spiral groove, each brush body becomes A state of extending spirally. In this state, the brush body is held on the outer peripheral surface of the shaft portion.

About the said structure, the said holding|maintenance body may be comprised by the several holding cylinder arrange|positioned in the axial direction of the said shaft part. A linear groove may be formed on the outer peripheral surface of each of the plurality of holding cylinders, and the linear groove may extend linearly in a direction inclined with respect to the axial direction. The linear grooves of the plurality of holding cylinders may be connected helically in a state where the plurality of holding cylinders are arranged in the axial direction. The said brush body may be arrange|positioned along the said linear groove of the state connected helically, and may be hold|maintained by the said several holding cylinder.

According to the above-mentioned configuration, the holding body is constituted by the plurality of holding cylinders arranged in the axial direction. That is, the holding body is divided in the axial direction of the shaft portion. In this case, the linear groove may be formed on the outer peripheral surfaces of the plurality of holding cylinders so as to extend linearly in a direction inclined with respect to the axial direction. When the plurality of holding cylinders are arranged in the axial direction, the plurality of linear grooves are connected helically to form a helical groove. Since the straight grooves extend straight, the part of the mold for forming the straight grooves may be drawn out in the extending direction of the straight grooves. As a result, the mold portion forming the straight groove can be easily separated from each holding cylinder.

Regarding the above configuration, the holding body may be formed of a flexible sheet-like material so as to be wound around the outer peripheral surface of the shaft portion. The brush body may extend helically along the outer peripheral surface of the holder when the holder is wound around the outer peripheral surface of the shaft portion.

According to the above configuration, when the holder is wound around the outer peripheral surface of the shaft portion, the brush body extending spirally along the outer peripheral surface of the holder can be obtained.

industrial availability The principle of this embodiment is suitable for use in a device used for cleaning work.

100: Inhaler 101: Vacuum Cleaner 102: Vacuum cleaner body 103: Hose 104: Operation Department 110: Inhalation space 120: Shell 121: body part 122: cover member 123, 124: Side 125: Rear 131, 132: Brush Rollers 210: Shaft 211: Base end ring 212: Conical barrel 213: Engagement recess 214: Shaft body 220: Keep Body 221: Spiral groove 222: Hold Sheet 223: Front end connector 224: Base end connector 225: Inner week section 226: Peripheral part 227: Recess 228: Engagement convex part 229: side edge 230: Brush Body 231: Bottom belt 232: Bristles 233: side edge 240: Front end cap 241: Platen 242: Embedded Department 250: connecting shaft 260: convex part 270: Internal connection 280: Punch 281: Body part 282: Spiral part 291: Side 292: side edge 311, 312: Retaining Cartridge 313: Base end barrel 314~316: Straight groove 317: Curved groove 318: Interior Space

Fig. 1 is a schematic side view of a vacuum cleaner. Fig. 2 is a schematic development perspective view of an inhaler configured to be attachable to a vacuum cleaner. Fig. 3 is a schematic plan view of a brush roll. 4 is a schematic cross-sectional view of a brush roll. Fig. 5 is a developed perspective view of a part of the brush roll. FIG. 6 is a schematic cross-sectional view of a brush roll. Fig. 7 is a schematic diagram showing the force acting on the dust when the dust is wound around the scraping roller. Fig. 8 is a schematic perspective view of a punch used for forming a brush roll. 9 is a schematic perspective view of a part of a brush roll having a divided structure in the circumferential direction. 10 is a schematic cross-sectional view of a part of a brush roll having a circumferentially divided structure. 11 is a schematic cross-sectional view of a part of a brush roll having a divided structure in the axial direction. FIG. 12 is a schematic development perspective view of a part of a brush roll that does not have a spiral groove portion.

131: Brush Roller

210: Shaft

211: Base end ring

212: Conical barrel

214: Shaft body

220: Keep Body

221: Spiral groove

222: Hold Sheet

223: Front end connector

224: Base end connector

227: Recess

230: Brush Body

231: Bottom belt

232: Bristles

233: side edge

260: convex part

291: Side

318: Interior Space

Claims (12)

A brush roller is configured to scrape dust while rolling, and has: a shaft portion having an outer peripheral surface tapered toward the front end; a holder mounted on the outer peripheral surface of the shaft portion; and The brush body is held by the holder so as to extend helically along the outer peripheral surface of the holder. The brush roller of claim 1, wherein the aforementioned holder comprises: A pair of holding pieces are attached to the outer peripheral surface of the shaft portion so as to be adjacent to each other with an interval in the circumferential direction of the shaft portion, In the pair of holding pieces, a helical groove extending helically is formed on one pair of side surfaces facing each other in the circumferential direction, The brush body is held between the pair of side surfaces. The brush roller of claim 2, wherein the aforementioned brush body comprises: bottom strap; and A plurality of bristles are implanted and arranged in the longitudinal direction of the aforementioned bottom band, Each of the aforementioned pair of holding pieces has: an outer peripheral portion forming a portion on the outer peripheral side in the aforementioned helical groove; and The inner peripheral portion is formed in the helical groove with a portion on the inner peripheral side wider than the portion on the outer peripheral side, The bottom band is wider than the portion on the outer peripheral side of the helical groove, and is arranged between the inner peripheral portions, The plurality of bristles protrude from the helical grooves through the gaps between the outer peripheral portions. The brush roller according to claim 3, wherein the inner peripheral portion of the pair of holding pieces is fixed to the above-mentioned in a state in which the inner peripheral portion of the pair of holding pieces is in surface contact with the outer peripheral surface of the shaft portion covering the entire longitudinal direction of the pair of holding pieces the aforementioned outer peripheral surface of the shaft portion. The brush roller according to any one of claims 2 to 4, wherein the aforementioned holder comprises: a front end connecting portion connecting the front end portions of the pair of holding pieces to each other; and The proximal end connecting portion connects the proximal end portions of the pair of holding pieces to each other. The brush roller according to claim 5, wherein the holder has a tapered cylindrical shape, and has an inner space that is circular in a cross section orthogonal to the axis of the shaft portion, The helical groove is formed so as to cover a section between the distal end connecting portion and the proximal end connecting portion and communicate with the inner space. The brush roller according to any one of claims 1 to 4, further comprising: a convex portion protruding from the outer peripheral surface of the shaft portion, A concave portion to be engaged with the convex portion is formed in the holder. The brush roller according to any one of claims 1 to 4, wherein the shaft portion is configured such that the taper angle in the base end side becomes smaller than the taper angle in the front end side. The brush roller according to any one of claims 2 to 4, wherein the pair of holding pieces are attached to the outer peripheral surface of the shaft portion in a state where the pair of holding pieces are not coupled to each other. As in the brush roller of claim 1, it further has: a plurality of brush bodies, including the aforementioned brush bodies, The aforementioned holding body includes: A plurality of holding pieces are formed into a spiral plate shape, The plurality of holding pieces are arranged in the circumferential direction of the shaft portion in a state that is not connected to each other, and are attached to the outer peripheral surface of the shaft portion, A helical groove extending helically is formed on the outer surface of each of the plurality of holding pieces, The plurality of brush bodies are arranged along the helical groove and are each held by the plurality of holding pieces. The brush roller according to claim 1, wherein the holding body is constituted by a plurality of holding cylinders arranged in the axial direction of the shaft portion, A linear groove is formed on the outer peripheral surface of each of the plurality of holding cylinders, and the linear groove extends linearly in a direction inclined with respect to the axial direction, The linear grooves of the plurality of holding cylinders are connected helically in a state in which the plurality of holding cylinders are arranged in the axial direction, The said brush body is arrange|positioned along the said linear groove of the state connected helically, and it is hold|maintained by the said several holding cylinder. The brush roller according to claim 1, wherein the holder is made of a flexible sheet-like material so as to be wound around the outer peripheral surface of the shaft portion, The brush body extends spirally along the outer peripheral surface of the holder when the holder is wound around the outer peripheral surface of the shaft portion.

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