WO2022014079A1

WO2022014079A1 - Brush roller

Info

Publication number: WO2022014079A1
Application number: PCT/JP2021/005926
Authority: WO
Inventors: 勇堀部; 孝一藤田; 剛羽田野
Original assignee: パナソニックＩｐマネジメント株式会社
Priority date: 2020-07-16
Filing date: 2021-02-17
Publication date: 2022-01-20
Also published as: JP7390623B2; JP2022018814A; CN116133568A; TW202216032A

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 roller

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

Various brush rollers have been developed that are configured to scrape dust while rolling on the floor (see Patent Document 1). The brush roller of Patent Document 1 has a shaft portion and a plurality of brush bodies protruding in the radial direction of the shaft portion from the outer peripheral portion of the shaft portion.

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

The formation of the spiral brush row promotes the movement of dust in contact with the brush body in the axial direction of the shaft portion. In Patent Document 1, the direction of the spiral of the brush row is set so that the dust moves toward the central position in the axial direction of the shaft portion.

Due to various demands on the brush roller, the spiral brush body may be held on the outer peripheral surface of the tapered cylindrical shaft portion that tapers toward the tip. By making the shaft portion tapered, it is possible to enhance the effect of moving long dust (for example, hair) wrapped around the brush roller toward the tip of the shaft portion. Further, by making the shaft portion cylindrical, the weight of the shaft portion is reduced as compared with the solid shaft structure.

However, it may be difficult to manufacture the structure in which the brush body is held on the outer peripheral surface of the tapered tubular shaft portion. For example, in order to form a spiral groove on the outer peripheral surface of a tapered tubular shaft portion according to Patent Document 1, a mechanism for separating the mold portion forming the spiral groove from the shaft portion is required. .. If the mold portion forming the spiral groove is to be pulled out in the axial direction of the shaft portion, the mold portion can be rotated around the axis of the shaft portion according to the shape of the spiral groove and the tapered shape of the shaft portion. It is necessary to displace it in the radial direction. The mechanism for moving the mold portion in this way complicates the structure of the molding machine.

Japanese Unexamined Patent Publication No. 2011-188951

An object of the present invention is to provide a brush roller that can be easily formed while having a structure in which a spiral brush body is held on an outer peripheral surface of a tapered tubular shaft portion.

The brush roller according to one aspect of the present invention is configured to scrape dust while rolling. The brush roller has a shaft portion having an outer peripheral surface that narrows toward the tip, a holding body attached to the outer peripheral surface of the shaft portion, and the holding body so as to spirally extend along the outer peripheral surface of the holding body. It has a brush body held on the body.

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

The object, features and advantages of the present invention will be made clearer by the following detailed description and accompanying drawings.

It is a schematic side view of a cleaning machine. It is a schematic development perspective view of the suction tool configured so that it can be attached to a cleaning machine. It is a schematic plan view of a brush roller. It is a schematic cross-sectional view of a brush roller. It is a developed perspective view of a part of a brush roller. It is a schematic cross-sectional view of a brush roller. It is a schematic diagram which shows the force acting on the dust when the dust is wound around a scraping roller. It is a schematic perspective view of a male type used for forming a brush roller. It is a schematic perspective view of a part of a brush roller which has a division structure in the circumferential direction. It is a schematic cross-sectional view of a part of a brush roller which has a division structure in the circumferential direction. It is a schematic cross-sectional view of a part of a brush roller which has an axial division structure. It is a schematic development perspective view of a part of a brush roller which does not have a spiral groove.

In the present embodiment, the

brush rollers

131 and 132 are configured as a part of the suction tool 100 attached to the cleaning machine 101. FIG. 1 is a schematic side view of the vacuum cleaner 101 to which the suction tool 100 is attached. FIG. 2 is a schematic developed perspective view of the suction tool 100. The cleaning machine 101 and the suction tool 100 will be described with reference to FIGS. 1 and 2.

As shown in FIG. 1, the cleaning machine 101 extends from the cleaning main body 102 having a suction fan (not shown) and a motor for driving the suction fan (not shown) and the cleaning main body 102 to the suction tool 100. The hose 103 provided and the operation unit 104 provided on the hose 103 are provided. The tip of the hose 103 is configured to be connectable to the suction tool 100. The operation unit 104 is configured to operate the cleaning main body unit 102 and the suction tool 100 in response to a user operation. The electrical wiring from the cleaning main body 102 and the suction tool 100 to the operation unit 104 is performed along the hose 103.

The suction tool 100 is attached to the tip of the hose 103 in order to obtain a suction area wider than the internal space of the hose 103. The suction tool 100 is configured to suck dust while scraping off dust on the floor surface.

In addition to the

brush rollers

131 and 132, the suction tool 100 includes a housing 120 configured to hold the

brush rollers

131 and 132, and a drive mechanism configured to drive the brush rollers 131 and 132 (FIG. FIG. Not shown) and.

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

The main body 121 has

side portions

123, 124 provided at positions separated from each other in the width direction (that is, the left-right direction) of the suction tool 100, and the rear side (that is, the cleaning main body portion 102 side) of the

side portions

123, 124. It is located in and includes a rear portion 125 connecting these

side portions

123 and 124. The

side portions

123, 124 and the rear portion 125 have a hollow structure as a whole. A drive mechanism is housed in the

side portions

123, 124 and the rear portion 125.

The rear portion 125 and the

side portions

123 and 124 form a suction space 110 for sucking dust on the floor surface. That is, the suction space 110 is partitioned by the front end of the rear portion 125, the right end of the side portion 123, and the left end of the side portion 124.

Brush rollers

131 and 132 are arranged in the suction space 110, and the

side portions

123 and 124 support these

brush rollers

131 and 132, respectively. 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 portion facing the suction space 110).

The rear 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 close the suction space 110 from above. The left and right ends 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 dust while rolling on the floor surface in the suction space 110. The brush roller 131 is cantilevered by the left side portion 123 and extends to the right from the side portion 123 in the suction space 110. The brush roller 132 is cantilevered by the right side portion 124 and extends to the left from the side portion 124 in the suction space 110. The tips 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 roller 131. FIG. 4 is a schematic cross-sectional view of a part of the brush roller 131 in the axial direction of the brush roller 131. FIG. 5 is a schematic developed perspective view of a part of the brush roller 131. FIG. 6 is a schematic cross-sectional view of a part of the brush roller 131 in a direction perpendicular to the axis of the brush roller 131. The structure of the brush roller 132 is the same as that of the brush roller 131. Therefore, the following description relating to the brush roller 131 is incorporated into the brush roller 132.

As shown in FIG. 3, the brush roller 131 is externally fitted to the connection shaft 250, the shaft portion 210 externally fitted to the connection shaft 250, the tip cap 240 attached to the tip of the shaft portion 210, and the shaft portion 210. It has a holding body 220 and the like.

The connection shaft 250 is provided to transmit the driving force of the drive mechanism housed in the main body portion 121 of the housing 120 to the shaft portion 210. The base end portion of the connection shaft 250 is arranged 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 of the connection shaft 250. The connection shaft 250 is fitted in a bearing provided on the inner wall portion of the side portion 123.

The tip of the connection 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. The outer peripheral surface of the tip of the connecting shaft 250 is knurled to prevent the connecting shaft 250 from spinning.

The shaft portion 210 has an outer peripheral surface that narrows toward the tip, and the outer shape of the shaft portion 210 is substantially circular over the entire length in a cross section perpendicular to the axis of the shaft portion 210.

The shaft portion 210 has a shaft main body 214 and an internal connection portion 270 integrally molded with the shaft main body 214.

The shaft main body 214 has a tapered tubular portion 212 extending in the axial direction of the shaft main body 214 while gradually thickening from the tip of the shaft main body 214 toward the proximal end side, and a proximal end ring portion provided on the proximal end side of the tapered tubular portion 212. 211 and. The axial length of the tapered cylinder portion 212 is longer than the axial length of the proximal end ring portion 211. The tapered cylinder portion 212 and the proximal end ring portion 211 have a tapered shape that tapers toward the tip of the shaft main body 214, but the taper angle of the proximal end ring portion 211 is larger than the taper angle of the tapered tubular portion 212. It's getting smaller. That is, the outer peripheral surface of the base end ring portion 211 is closer to parallel to the axis of the shaft portion 210 than the outer peripheral surface of the tapered cylinder portion 212.

As shown in FIG. 4, the internal connection portion 270 is provided to connect the connection shaft 250 and the shaft portion 210, and is a tapered cylinder portion so as to be connected to the tip portion (knurled portion) of the connection shaft 250. It is integrally molded with the tapered cylinder portion 212 in the 212. The internal connection portion 270 and the shaft portion 210 may be molded by injecting resin in a state where the tip portion of the connection shaft 250 after knurling is arranged in a mold for molding them.

A holding body 220 is externally fitted to the shaft portion 210. The holding body 220 is provided to hold a plurality of brush bodies 230 extending in a spiral shape, and as shown in FIG. 5, is formed in a tapered tubular shape separately from the shaft portion 210. The holding body 220 is attached to the outer peripheral surface of the shaft portion 210 by being fitted onto the shaft portion 210. The holding body 220 holds a 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 holding body 220 includes an annular tip connecting portion 223 connecting the tips of the holding pieces 222 and an annular proximal connecting portion 224 connecting the proximal ends of the holding pieces 222.

The holding body 220 is configured to form a tapered tubular shape that narrows toward the tip in a state where a 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. ing. Each of these holding pieces 222 is a thin plate-shaped portion extending in a spiral shape. In other words, each of the plurality of holding pieces 222 has a shape in which a trapezoidal thin plate that narrows toward the tip of the shaft portion 210 is spirally wound around the outer peripheral surface of the shaft portion 210. The interior space 318 of the retainer 220 (see FIG. 5) surrounded by a plurality of retainer pieces 222 arranged in the circumferential direction is complementary to the shaft portion 210 and has a cross section perpendicular to the axis of the retainer 220. It has a circular shape and a shape that tapers toward the tip.

Since these holding pieces 222 are arranged at intervals in the circumferential direction of the shaft portion 210, they spiral between adjacent holding pieces 222 (that is, between the side surfaces 291 of the holding pieces 222 facing each other in the circumferential direction). A groove 221 is formed. The spiral groove 221 extends spirally on the outer peripheral surface of the shaft portion 210, and the brush body 230 is arranged along the spiral groove 221. The direction of the spiral groove 221 (and thus the shape of the holding piece 222) is such that when the brush roller 131 rotates in the direction indicated by the arrow in FIG. 2, the brush body 230 sends out dust toward the tip of the shaft portion 210. It is set.

As shown in FIG. 6, the holding piece 222 is located outside the inner peripheral portion 225 having an inner peripheral surface facing the outer peripheral surface of the shaft portion 210 and the inner peripheral portion 225 in the radial direction of the shaft portion 210. It also has an outer peripheral portion 226 that is wider than the inner peripheral portion 225. The inner peripheral portion 225 constitutes the inner peripheral surface of the holding piece 222 that comes into 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 composed of a side surface of the side edge portion 292 of the outer peripheral portion 226 and a side edge surface 229 of the inner peripheral portion 225. The both side edge portions 292 of the outer peripheral portion 226 project in the width direction of the spiral groove 221 with respect to the 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 surfaces 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 of the outer peripheral portions 226 of the adjacent holding pieces 222 at the side edge portion 292 face each other in the width direction of the spiral groove 221. Similarly, the side edge surfaces 229 of the inner peripheral portions 225 of the adjacent holding pieces 222 also face each other in the width direction of the spiral groove 221. The side edge surface 229 of the inner peripheral portion 225 of the adjacent holding pieces 222 forms a portion on the inner peripheral side of the spiral groove 221, and the spiral groove 221 is wide in the portion on the inner peripheral side. The side surface of the side edge portion 292 of the outer peripheral portion 226 of the adjacent holding pieces 222 forms the outer peripheral side portion of the spiral groove 221, and the spiral groove 221 is narrowed in the outer peripheral side portion. A part of the brush body 230 is sandwiched in the radial direction of the shaft portion 210 between the side edge portion 292 of the outer peripheral portion 226 of the adjacent holding pieces 222 and the outer peripheral surface of the shaft portion 210, so that the brush body 230 is formed. It is held on the outer peripheral surface of the shaft portion 210.

The inner peripheral portion 225 is in the longitudinal direction of the holding piece 222 so that the side edge portion 292 of the outer peripheral portion 226 maintains a surface contact state even when it receives an external force acting in a direction away from the outer peripheral surface of the shaft portion 210. It is fixed to the outer peripheral surface of the shaft portion 210 over the entire surface. For example, the inner peripheral portion 225 may be adhered to the outer peripheral surface of the shaft portion 210 with an adhesive, or may be ultrasonically welded to the outer peripheral surface of the shaft portion 210.

The tips of the plurality of holding pieces 222 are connected to the annular tip 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 distance between the adjacent holding pieces 222 is maintained by the distal end connecting portion 223 on the distal end side and 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 above-mentioned internal space 318 of the holding body 220 between the tip connecting portion 223 and the proximal end connecting portion 224. Since the plurality of holding pieces 222 are connected to the tip connecting portion 223 and the proximal end connecting portion 224, the holding body 220 is configured as one tapered cylinder.

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

Since the proximal ends 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 is formed in a recess 227 with a closed outer surface (see FIG. 5). It has become. That is, a plurality of recesses 227 are formed at intervals along the inner peripheral edge of the proximal end connecting portion 224. These recesses 227 can be used to pull out the mold portion (spiral portion 282 shown in FIG. 8) used to form the spiral groove 221.

The recess 227 is also used to prevent the relative rotation of the holder 220 with respect to the shaft portion 210. That is, as shown in FIG. 5, in order to prevent the relative rotation between the holding body 220 and the shaft portion 210, the plurality of convex portions 260 of the shaft portion 210 are engaged with the plurality of concave portions 227, respectively. It protrudes from the outer peripheral surface of the base end ring portion 211. These convex portions 260 have a shape 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 these concave portions 227. The convex portion 260 fits into the concave portion 227 when the holding body 220 is fitted onto the shaft portion 210.

The plurality of brush bodies 230 each include an elongated rectangular baseband 231 configured to be inserted into the spiral groove 221 and a plurality of brush bristles 232 planted in the baseband 231. The baseband 231 is a portion used for holding by the holding body 220. The plurality of brush bristles 232 are provided for scraping off dust.

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

The baseband 231 is flexible enough to be curved and deformed along the spiral groove 221 when inserted from the tip portion of the spiral groove 221 while being caught on the side edge portion 292 of the outer peripheral portion 226. It has enough rigidity to maintain the state.

The plurality of brush bristles 232 are planted in the longitudinal direction of the baseband 231 in the central region in the width direction of the baseband 231 (that is, the region between the side edge portions 233), and the brush row extending in the longitudinal direction of the baseband 231. Is forming. When the brush body 230 is inserted into the spiral groove 221 the brush row protrudes from the gap between the side edges 292 of the outer peripheral portion 226 of the adjacent holding pieces 222 (that is, the narrow portion of the spiral groove 221). ..

When the brush body 230 is inserted into the spiral groove 221 from the tip of the spiral groove 221 until the brush row abuts on the proximal end connection portion 224, the brush row of the brush body 230 spirals on the outer peripheral surface of the holding body 220. It is held by the holding body 220 in the extended state. At this time, since the brush row is caught by the proximal end connecting portion 224, the displacement of the brush body 230 in the proximal end direction is prevented by the proximal end connecting portion 224. On the other hand, a tip cap 240 is provided in order to prevent the brush body 230 from being displaced in the tip direction.

The opening on the tip side of the spiral groove 221 is closed by the tip cap 240. That is, the tip cap 240 is fitted into the tip portion of the shaft portion 210 through the opening of the disc-shaped suppression plate 241 having a diameter that closes the opening and the annular tip connection portion 223 of the holding body 220. 242 and is included. Since the suppression plate 241 closes the opening on the tip end side of the spiral groove 221, the tip end of the baseband 231 is caught by the suppression plate 241 and the displacement of the brush body 230 toward the tip end is prevented.

The operation of the suction tool 100 and the cleaning machine 101 will be described below.

When the operation unit 104 is operated, the cleaning machine 101 operates, and the suction force acts on the suction space 110 through the flow path formed in the hose 103 and the rear portion 125 of the suction tool 100. As a result, 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 in the cleaning machine 101 through the flow path of the rear 125 and the hose 103.

During this time, the drive mechanism built in the suction tool 100 operates, and the drive force of the drive mechanism is transmitted to the shaft portion 210, the holding body 220, and the plurality of brush bodies 230 through the connection shaft 250 and the internal connection portion 270. At this time, the brush body 230 scrapes off the dust on the floor surface while rolling on the floor surface.

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 cylinder portion 212 on the distal end side, and the outer peripheral surface of the base end ring portion 211 is the shaft portion 210. It is almost parallel to the axis of. Therefore, the outer diameter of the base end of the shaft portion 210 is smaller than that of the tapered cylinder extended while maintaining the taper angle of the tapered cylinder portion 212. Therefore, the increase in size of the

brush rollers

131 and 132 in the radial direction is suppressed, and the increase in size of the housing 120 to which the

brush rollers

131 and 132 are attached is also suppressed.

As described above, the direction of the spiral of the spiral groove 221 in which the brush body 230 is arranged is set so as to send dust toward the tip when the

brush rollers

131 and 132 rotate in the direction indicated by the arrow in FIG. .. Therefore, the brush body 230 can promote the movement of dust in the direction toward the tip 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 are scraping dust on the floor surface, long dust (for example, hair) may wrap around the brush rollers 131 and 132 (see FIG. 7). Since the

brush rollers

131 and 132 have a tapered shape that tapers toward the tip, the component force of the winding force of long dust tends to be directed toward the tip side of the

brush rollers

131 and 132. Therefore, the long dust wrapped around the

brush rollers

131 and 132 can be moved toward the tips of the

brush rollers

131 and 132.

Since the spiral groove 221 on which the brush body 230 is arranged is formed at intervals in the circumferential direction of the

brush rollers

131 and 132, the brush row composed of the plurality of brush bristles 232 is also formed around the

brush rollers

131 and 132. It is formed at intervals in the direction. Since the brush bristles 232 are not provided over the entire circumference of the

brush rollers

131 and 132, the load on the drive mechanism does not become excessively large.

Although the shaft portion 210 and the holding body 220 are formed separately from each other, the concave portion 227 of the holding body 220 is engaged with the convex portion 260 protruding from the outer peripheral surface of the shaft portion 210, so that the shaft portion 210 and the holding body 220 are formed. The integral rotation of the retainer 220 is guaranteed.

Since the shaft portion 210 is formed separately from the holding body 220, the molding machine used for molding the shaft portion 210 does not have to have a mechanism for forming the spiral groove 221. Therefore, the molding machine for molding the shaft portion 210 does not have to have an excessively complicated structure.

The spiral groove 221 of the holding body 220 communicates with the internal space 318 of the holding body 220 over a section between the tip end connecting portion 223 and the proximal end connecting portion 224. In this case, the inner surface of the spiral groove 221 and the holding body 220 can be formed by using the male mold 280 as shown in FIG.

As shown in FIG. 8, the male mold 280 has a truncated cone-shaped main body portion 281 having substantially the same shape as the outer shape of the shaft portion 210, and a plurality of spiral portions 282 spirally protruding from the outer peripheral surface of the main body portion 281. Have. The main body portion 281 is a portion for forming the inner surface of the holding body 220, and the spiral portion 282 is a portion for forming the spiral groove 221.

The holder 220 can be molded by injecting resin into the cavity between the male mold 280 in a state where the male mold 280 is inserted into the female mold (not shown) that molds the outer surface of the holder 220. After molding the retainer 220, the male mold 280 is withdrawn from the female mold forming the outer surface of the retainer 220. Then, when the holding body 220 is pulled out from the male type 280 while rotating relatively around the axis of the male type 280, the holding body 220 is separated from the male type 280. Since the spiral portion 282 is not provided in the female mold, the problem that the holding body 220 remains in the female mold in a state of being caught by the spiral portion 282 is unlikely to occur.

After the holding body 220 and the shaft portion 210 are molded, the holding body 220 and the shaft portion 210 are fitted. After that, the base band 231 of the brush body 230 is inserted into the spiral groove 221. Since the baseband 231 has flexibility, the brush body 230 can be inserted up to the proximal end connecting portion 224 while curving along the spiral groove 221. At this time, the side edge portions 233 of the baseband 231 are sandwiched in the radial direction of the shaft portion 210 by the side edge portions 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 of being extended spirally.

At this time, since the brush row formed by the plurality of brush bristles 232 protrudes from the spiral groove 221, it hits the proximal end connecting portion 224 and the movement of the brush body 230 to the proximal end side is prevented. After that, the tip cap 240 is attached to the tips of the holding body 220 and the shaft portion 210 to prevent the brush body 230 from moving toward the tip side.

When the brush bristles 232 rub against the floor surface, the brush bristles 232 receive an external force from the floor surface. This external force is transmitted to the baseband 231 in which the brush bristles 232 are planted. This external force may act to tilt the baseband 231 around the axis of the baseband 231. In this case, one side edge portion 233 of the baseband 231 is pressed against 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 turn up from the outer peripheral surface of the shaft portion 210. .. That is, the side edge portion 233 of the baseband 231 is maintained in a state of being sandwiched between the outer peripheral surface of the shaft portion 210 and the outer peripheral portion 226 of the holding piece 222, and the baseband 231 is prevented from coming out of the spiral groove 221.

Regarding the above-described embodiment, the holding body 220 is configured by using six holding pieces 222, but the holding body 220 may be formed from two or more holding pieces 222.

Regarding the above-described embodiment, the brush body 230 is arranged in the spiral groove 221. Alternatively, the brush body 230 may be fixed to the outer peripheral surface of the holding body 220 with 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 a tip connecting portion 223 and a proximal end connecting portion 224. That is, in the above-described embodiment, the plurality of holding pieces 222 can be integrally attached to the outer peripheral surface of the shaft portion 210. Alternatively, the tip connection portion 223 and the proximal end connection portion 224 may be omitted, and the holding piece 222 may be configured to be individually mountable on 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 cylinder shape that tapers toward the tip at a constant 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 mounting a 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 an elongated spiral plate in the axial direction of the shaft portion 210. These holding pieces 222 are configured to form a tapered tubular shape that narrows toward the tip while being arranged at intervals in the circumferential direction of the shaft portion 210, and is formed along the outer peripheral surface of the shaft portion 210. It extends in a spiral so that it is arranged in a spiral shape.

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 engageable with the engaging concave portion 213 of the shaft portion 210.

The shape of the side surface 291 of the holding piece 222 is similar to that shown in FIGS. 4 and 6, and when the holding pieces 222 are attached to the outer peripheral surface of the shaft portion 210 at intervals, the holding pieces 222 adjacent to each other A spiral groove 221 (see FIG. 5) is formed between the side surfaces 291.

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

When the split structure of the holding piece 222 as shown in FIG. 9 is adopted, the holding piece 222 can be easily formed, so that the spiral groove 221 may be formed on the outer surface of the holding piece 222 (FIG. 10). See). 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 spiral groove 221 is extended in a spiral shape. Further, in a cross section perpendicular to the axis of the shaft portion 210, the spiral groove 221 forms a narrow groove width in the vicinity of the outer surface of the holding piece 222, and a wide groove on the shaft portion 210 side with respect to the narrow groove width portion. It is configured to form a width.

If the spiral groove 221 is formed in this way, when the base band 231 of the brush body 230 is inserted into a wide space, both side edge portions 233 of the base band 231 are caught by the holding piece 222 in the spiral groove 221. That is, the brush body 230 is held by the holding piece 222.

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

The holding body 220 shown in FIG. 11 has holding

cylinders

311, 312 and base end cylinders 313. The holding

cylinders

311, 312 and the base end cylinder 313 are configured to be externally fitted to the shaft portion 210 shown in FIG. That is, the holding

cylinders

311, 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, 312 are formed into a tapered cylinder that becomes thinner toward the tip. The holding

cylinders

311, 312 are configured so that there is no step between their outer peripheral surfaces and inner peripheral surfaces, and when they are connected to the shaft portion 210 and fitted externally, they are tapered as a whole. Is forming.

A plurality of straight grooves 314 to 316 extending linearly in a direction inclined with respect to the axial direction of the shaft portion 210 are formed on the outer peripheral surfaces of the holding

cylinders

311, 312 and the base end cylinder 313, respectively. The plurality of straight grooves 314 are formed at intervals in the circumferential direction of the holding cylinder 311. The plurality of straight grooves 315 are formed at intervals in the circumferential direction of the holding cylinder 312. The plurality of straight grooves 315 are formed at intervals in the circumferential direction of the base end cylinder 313. These straight grooves 314 to 316 have the same shape as the spiral groove 221 shown in FIG. 10 in a cross section perpendicular to the extending direction of the straight grooves 314 to 316.

Although the straight grooves 314 to 316 are linearly extended, their extension angles are different from each other. Specifically, the straight grooves 314 to 316 are configured to be spirally connected when the holding

cylinders

311, 312 and the base end cylinder 313 are connected in the axial direction of the shaft portion 210. Although these straight grooves 314 to 316 form a bent groove space between the holding cylinders 31 and 312 and between the holding cylinders 312 and the base end cylinders 313, the baseband 231 of the brush body 230 is flexible. Since it has, it can be inserted along the bent groove portion 317. Therefore, the brush body 230 is arranged along the linear grooves 314 to 316 in a spirally connected state, and is held by the holding

cylinders

311, 312 and the base end cylinder 313.

Since the straight grooves 314 to 316 are linearly extended, a mold portion (not shown) used for forming the straight grooves 314 to 316 when forming the holding

cylinders

311, 312 and the base end cylinder 313. Can be pulled out linearly in the extending direction of the linear grooves 314 to 316. Therefore, the holding

cylinders

311, 312 and the base end cylinder 313 can be easily molded.

Since the base end cylinder 313 has a substantially cylindrical shape and not a tapered cylinder shape, even if the base end cylinder 313 is integrally molded with the shaft portion 210, the molding machine used for molding the base end cylinder 313 and the shaft portion 210 is excessively formed. It doesn't get complicated. Therefore, the base end cylinder 313 may be integrally formed with the shaft portion 210.

An additional holding cylinder may be used instead of the base end cylinder 313. In this case, the additional holding cylinder is configured so that there is no step with respect to the holding cylinder 312 on the inner peripheral surface and the outer peripheral surface. The additional holding cylinders may be configured to form a tapered cylinder as a whole when connected to the holding

cylinders

311, 312 and fitted to the outside of the shaft portion 210.

The shaft portion 210 may be configured to position the holding

cylinders

311, 312 and the base end cylinder 313 in the circumferential direction at positions where the straight grooves 314 to 316 are spirally connected. For example, the shaft portion 210 may have a cross-sectional shape like a spline shaft. In this case, the holding

cylinders

311, 312 and the base end cylinder 313 may have an inner peripheral shape complementary to the shaft portion 210.

Regarding the above-described embodiment, the holding body 220 is a resin molded product. Alternatively, as shown in FIG. 12, the holding body 220 may be made 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 that it can be deformed from a flat state into a curved shape wound around the outer peripheral surface of the shaft portion 210. The brush body 230 can be formed by planting the plurality of brush hairs 232 in a band shape with respect to the holding body 220 in a flat state. The area where the plurality of brush bristles 232 are planted may be defined so that when the holding body 220 is wound around the outer peripheral surface of the shaft portion 210, a spirally extending brush row is obtained.

When the holding body 220 is in a flat state, the brush bristles 232 can be easily planted in the holding body 220. Therefore, the holding body 220 in which the brush body 230 is held is easily formed. The brush roller 131 is easily created by winding the holding body 220 around the outer peripheral surface of the shaft portion 210.

The above-described embodiment mainly includes the following configurations.

The brush roller according to one aspect of the above-described embodiment is configured to scrape dust while rolling. The brush roller has a shaft portion having an outer peripheral surface that narrows toward the tip, a holding body attached to the outer peripheral surface of the shaft portion, and the holding body so as to spirally extend along the outer peripheral surface of the holding body. It has a brush body held on the body.

According to the above configuration, the holding body that holds the brush body is configured separately from the shaft portion and then attached to the shaft portion. Therefore, it is not necessary to provide a structure for holding the brush body in the shaft portion. Therefore, it is possible to prevent the mold for forming the shaft portion from becoming complicated.

With respect to 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 at intervals in the circumferential direction of the shaft portion. In the pair of holding pieces, the pair of side surfaces facing each other in the circumferential direction may form a spiral groove extending in a spiral shape. The brush body may 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 these holding pieces on the outer peripheral surface of the shaft portion. The brush body is arranged along this spiral groove and extends in a spiral shape. 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.

With respect to the above configuration, the brush body may include a baseband and a plurality of brush bristles planted in the longitudinal direction of the baseband. The pair of holding pieces includes an outer peripheral portion that forms a portion on the outer peripheral side of the spiral groove and an inner peripheral portion that forms a portion of the spiral groove on the inner peripheral side that is wider than the portion on the outer peripheral side. You may have. The baseband may be wider than the outer peripheral portion of the spiral groove and may be arranged between the inner peripheral portions. The plurality of brush bristles may protrude from the spiral groove through a gap between the outer peripheral portions.

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

With respect to the above configuration, the inner peripheral portion of the pair of holding pieces is in surface contact with the outer peripheral surface of the shaft portion over the entire longitudinal direction of the pair of holding pieces, and the outer peripheral surface of the shaft portion is in contact with the outer peripheral surface. It may be fixed to.

According to the above configuration, the inner peripheral portion of the pair of holding pieces is fixed to the outer peripheral surface of the shaft portion in a state of being in surface contact with the outer peripheral surface of the shaft portion over the entire longitudinal direction of the pair of holding pieces. Therefore, the deformation of the pair of holding pieces that widens the width of the spiral groove is suppressed. Therefore, it is also prevented that the baseband comes out of the spiral groove.

With respect to the above configuration, the holding body includes a tip connecting portion for connecting the tips of the pair of holding pieces and a proximal connecting portion for connecting the proximal ends of the pair of holding pieces. May be good.

According to the above configuration, since the pair of holding pieces are connected to each other by the tip connecting portion and the proximal connecting portion, the holding body can be treated as one member. Further, since the tip connection portion and the proximal connection portion maintain their spacing on the distal end side and the proximal end side of the pair of holding pieces, the spiral groove width is maintained over the entire length of the spiral groove. The body can be attached to the outer peripheral surface of the shaft portion.

Regarding the above configuration, the holding body may have a tapered tubular shape having a circular internal space in a cross section orthogonal to the axis of the shaft portion. The spiral groove may be formed so as to communicate with the internal space over a section between the tip end connection portion and the proximal end connection portion.

According to the above configuration, when the retainer is formed into a tapered tubular shape, the spiral groove communicates with the tapered tubular internal space over the section between the tip connection and the proximal connection. Can be molded into. In this case, the outer surface of the holder can be molded with a female mold, and the spiral groove and the inner peripheral surface of the holder can be molded with a male mold. This male shape can be configured by a main body portion that forms an internal space of the holding body and a spiral portion that spirally protrudes from the outer peripheral surface of the main body portion so as to form a spiral groove. Since the main body portion has a shape complementary to the internal space of the holding body, the main body portion has a circular cross section in a cross section orthogonal to the axis of the shaft portion, and has a shape rotatable around the axis of the main body portion in the holding body portion. Therefore, it is permissible to pull out the male mold from the holding body in the axial direction of the holding body while rotating the main body portion around the axis of the shaft portion according to the spiral shape of the spiral portion.

Regarding the above configuration, the brush roller may further include a convex portion protruding from the outer peripheral surface of the shaft portion. The holding body may be formed with a concave portion that engages with the convex portion.

According to the above configuration, the engagement between the convex portion and the concave portion prevents the relative rotation of the shaft portion with respect to the holding body.

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

According to the above configuration, the taper angle of the shaft portion on the proximal end side is relatively small, and in the portion where the taper angle is small, the outer peripheral surface of the brush roller is close to parallel to the axis of the brush roller. It has become. In this case, the diameter of the base end side of the brush roller is smaller than that of the tubular body extended to the base end side while maintaining the taper angle on the tip side, and the increase in size of the brush roller in the radial direction is suppressed. ..

Regarding the above configuration, the pair of holding pieces may be attached to the outer peripheral surface of the shaft portion in a state where they are not connected to each other.

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

Regarding the above configuration, the brush roller may further include a plurality of brush bodies including the brush body. The holding body may include a plurality of holding pieces formed in a spiral plate shape. The plurality of holding pieces may be attached to the outer peripheral surface of the shaft portion side by side in the circumferential direction of the shaft portion in a state where they are not connected to each other. A spiral groove extending spirally 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 spiral groove and 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 molded as a spiral plate-shaped member. Forming a spiral groove in such a spiral plate-shaped member is easier than forming a spiral groove on the outer peripheral surface of the tapered tubular shaft portion.

When a plurality of spiral plate-shaped holding pieces are arranged in the circumferential direction of the shaft portion and attached to the outer peripheral surface of the shaft portion, and the plurality of brush bodies are arranged along the spiral groove, each brush body is in a state of extending in a spiral shape. Become. The brush body is held on the outer peripheral surface of the shaft portion in this state.

Regarding the above-mentioned configuration, the holding body may be composed of a plurality of holding cylinders arranged in the axial direction of the shaft portion. A straight groove extending linearly in a direction inclined with respect to the axial direction may be formed on the outer peripheral surface of each of the plurality of holding cylinders. The straight groove of the plurality of holding cylinders may be spirally connected in a state where the plurality of holding cylinders are arranged in the axial direction. The brush body may be arranged along the straight groove in a state of being spirally connected and held by the plurality of holding cylinders.

According to the above configuration, the holding body is composed of a 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 surface of the plurality of holding cylinders so as to extend linearly in a direction inclined with respect to the axial direction. When a plurality of holding cylinders are arranged in the axial direction, the plurality of straight grooves are connected in a spiral shape to form a spiral groove. Since the straight groove extends linearly, the mold portion forming the straight groove may be pulled out linearly in the extending direction of the straight groove. As a result, the mold portion forming the straight groove is easily separated from each holding cylinder.

Regarding the above-mentioned configuration, the holding body may be made of a sheet-like material having flexibility so as to be wound around the outer peripheral surface of the shaft portion. The brush body may extend spirally 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 holding body is wound around the outer peripheral surface of the shaft portion, a brush body extending spirally along the outer peripheral surface of the holding body is obtained.

The principle of this embodiment is suitably used for an apparatus used for cleaning work.

Claims

A brush roller configured to scrape dust while rolling,
A shaft part with an outer peripheral surface that narrows toward the tip,
A holding body attached to the outer peripheral surface of the shaft portion and
A brush roller comprising a brush body held by the holder so as to spirally extend along the outer peripheral surface of the holder.
The holding body includes a pair of holding pieces attached to the outer peripheral surface of the shaft portion so as to be adjacent to each other at intervals in the circumferential direction of the shaft portion.
In the pair of holding pieces, the pair of side surfaces facing each other in the circumferential direction form a spiral groove extending in a spiral shape.
The brush roller according to claim 1, wherein the brush body is held between the pair of side surfaces.
The brush body includes a baseband and a plurality of brush bristles implanted in the longitudinal direction of the baseband.
The pair of holding pieces includes an outer peripheral portion that forms a portion on the outer peripheral side of the spiral groove and an inner peripheral portion that forms a portion of the spiral groove on the inner peripheral side that is wider than the portion on the outer peripheral side. Have and
The baseband is wider than the outer peripheral portion of the spiral groove and is arranged between the inner peripheral portions.
The brush roller according to claim 2, wherein the plurality of brush bristles project from the spiral groove through a gap between the outer peripheral portions.
The inner peripheral portion of the pair of holding pieces is fixed to the outer peripheral surface of the shaft portion in a state of being in surface contact with the outer peripheral surface of the shaft portion over the entire longitudinal direction of the pair of holding pieces. , The brush roller according to claim 3.
The holding body includes a tip connecting portion for connecting the tip portions of the pair of holding pieces and a proximal connecting portion for connecting the proximal ends of the pair of holding pieces. The brush roller according to any one of 4.
The holding body has a tapered tubular shape having a circular internal space in a cross section orthogonal to the axis of the shaft portion.
The brush roller according to claim 5, wherein the spiral groove is formed so as to communicate with the internal space over a section between the tip end connection portion and the proximal end connection portion.
Further provided with a convex portion protruding from the outer peripheral surface of the shaft portion,
The brush roller according to any one of claims 1 to 6, wherein the holding body is formed with a concave portion that engages with the convex portion.
The brush roller according to any one of claims 1 to 7, wherein the shaft portion is configured such that the taper angle on the proximal end side is smaller than the taper angle on the distal 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 they are not connected to each other.
Further provided with a plurality of brush bodies including the brush body,
The holding body includes a plurality of holding pieces formed into a spiral plate shape, and the holding body contains a plurality of holding pieces.
The plurality of holding pieces are attached to the outer peripheral surface of the shaft portion side by side in the circumferential direction of the shaft portion in a state where they are not connected to each other.
A spiral groove extending spirally is formed on the outer surface of each of the plurality of holding pieces.
The brush roller according to claim 1, wherein the plurality of brush bodies are arranged along the spiral groove and are respectively held by the plurality of holding pieces.
The holding body is composed of a plurality of holding cylinders arranged in the axial direction of the shaft portion.
A straight groove extending linearly in a direction inclined with respect to the axial direction is formed on the outer peripheral surface of each of the plurality of holding cylinders.
The straight groove of the plurality of holding cylinders is spirally connected in a state where the plurality of holding cylinders are arranged in the axial direction.
The brush roller according to claim 1, wherein the brush body is arranged along the straight groove in a state of being connected in a spiral shape and is held by the plurality of holding cylinders.
The holding body is made of a sheet-like material having flexibility so as to be wound around the outer peripheral surface of the shaft portion.
The brush roller according to claim 1, wherein the brush body spirally extends along the outer peripheral surface of the holder when the holder is wound around the outer peripheral surface of the shaft portion.