CN116133568A

CN116133568A - Brush roll

Info

Publication number: CN116133568A
Application number: CN202180060601.XA
Authority: CN
Inventors: 堀部勇; 藤田孝一; 羽田野刚
Original assignee: Panasonic Intellectual Property Management Co Ltd
Current assignee: Panasonic Intellectual Property Management Co Ltd
Priority date: 2020-07-16
Filing date: 2021-02-17
Publication date: 2023-05-16
Also published as: WO2022014079A1; JP2022018814A; JP7390623B2; TW202216032A

Abstract

The application discloses a brush roller which is configured to roll and clean dust. The brush roll includes: a shaft portion having an outer peripheral surface which is thinner toward the distal end; a holder attached to the outer peripheral surface of the shaft portion; the brush body is held by the holding body in a manner of extending spirally along the outer peripheral surface of the holding body.

Description

Brush roll

Technical Field

The present invention relates to a brush roller for cleaning dust.

Background

Various brush rollers have been developed for cleaning dust while rolling on the floor (see patent document 1). The brush roller of patent document 1 includes a shaft portion and a plurality of brush bodies protruding radially from an outer peripheral portion of the shaft portion toward the shaft portion.

A spiral groove extending in a spiral shape is formed in an outer peripheral portion of the shaft portion. The brush body is fixed to the shaft portion along the spiral groove, thereby forming a spiral brush row.

By forming the spiral brush row, movement of dust in contact with the brush body in the axial direction of the shaft portion can be promoted. In patent document 1, the spiral direction of the brush row is set so that dust moves toward the axial center position of the shaft portion.

Based on various requirements for the brush roller, the following structure is sometimes adopted: the spiral brush body is held on the outer peripheral surface of the tapered cylindrical shaft portion which is thinner toward the distal end. By forming the shaft portion in a tapered shape, the effect of moving long dust (for example, hair) wound around the brush roller toward the distal end of the shaft portion can be improved. Further, by forming the shaft portion in a cylindrical shape, the shaft portion can be made lighter than a solid shaft structure.

However, when a structure is employed in which the brush body is held on the outer peripheral surface of the tapered cylindrical shaft portion, there is a difficulty in manufacturing. For example, when a spiral groove is to be formed in the outer peripheral surface of a tapered cylindrical shaft portion as in patent document 1, a mechanism for separating a mold portion for forming the spiral groove from the shaft portion is required. If the mold portion forming the spiral groove is pulled out in the axial direction of the shaft portion, the mold portion needs to be rotatable around the axis of the shaft portion in accordance with the shape of the spiral groove and radially displaceable in accordance with the tapered shape of the shaft portion. The mechanism for driving the mold section in this way complicates the structure of the molding machine.

Prior art literature

Patent literature

Patent document 1: japanese patent laid-open publication No. 2011-188951

Disclosure of Invention

The invention aims to provide a brush roller, which comprises the following components: the brush body can be easily molded while having a structure for holding the spiral brush body on the outer peripheral surface of the tapered cylindrical shaft portion.

The brush roller according to one aspect of the present invention is configured to clean dust while rolling. The brush roll includes: a shaft portion having an outer peripheral surface which is thinner toward the distal end; a holder attached to the outer peripheral surface of the shaft portion; and a brush body which is held by the holding body in a manner of extending in a spiral shape along the outer peripheral surface of the holding body.

The 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 detailed description set forth below and the accompanying drawings.

Drawings

Fig. 1 is a schematic side view of a cleaning machine.

Fig. 2 is a simplified exploded perspective view of an inhalation device capable of being mounted to a cleaning machine.

Fig. 3 is a schematic top view of a brushroll.

Fig. 4 is a schematic cross-sectional view of a brush roll.

Fig. 5 is a partially exploded perspective view of the brush roller.

Fig. 6 is a schematic cross-sectional view of a brushroll.

Fig. 7 is a schematic diagram showing forces acting on dust when the dust winds around the cleaning roller.

Fig. 8 is a schematic perspective view of a male mold for molding the brush roller.

Fig. 9 is a partially schematic perspective view of a brush roller having a divided structure in the circumferential direction.

Fig. 10 is a partially schematic cross-sectional view of a brush roller having a split structure in the circumferential direction.

Fig. 11 is a partial schematic cross-sectional view of a brush roller having a split structure in the axial direction.

Fig. 12 is a partially exploded perspective view of a brush roll without a spiral groove.

Detailed Description

In the present embodiment, the

brush rollers

131 and 132 are configured as parts of the suction tool 100 attached to the cleaning machine 101. Fig. 1 is a schematic side view of a cleaning machine 101 with an inhalation device 100 mounted thereto. Fig. 2 is a simplified exploded perspective view of inhalation device 100. The cleaning machine 101 and the inhalation device 100 will be described with reference to fig. 1 and 2.

As shown in fig. 1, the cleaning machine 101 includes: a cleaner body 102 having a suction fan (not shown) incorporated therein and a motor (not shown) for driving the suction fan; a hose 103 extending from the cleaner body 102 to the suction tool 100; an operation unit 104 provided in the hose 103. The distal end portion of the hose 103 is configured to be connectable to the inhalation device 100. The operation unit 104 is configured to operate the cleaner body 102 and the inhalation device 100 by receiving an operation of a user. The electric wire from the cleaner body 102 to the operation unit 104 is routed along the hose 103.

To obtain a suction area having a width wider than the inner space of the hose 103, the suction tool 100 is mounted to the distal end of the hose 103. The suction tool 100 is configured to suck dust on the floor while cleaning the dust.

The suction tool 100 includes, in addition to the

brush rollers

131 and 132, a housing 120 configured to hold the

cleaning roller units

131 and 132, and a driving mechanism (not shown) configured to drive the

cleaning roller units

131 and 132.

As shown in fig. 2, in order to obtain a wide suction space 110 in the width direction, the case 120 has a shape wider in the width direction than in the front-rear direction. The housing 120 includes: a main body 121 having a substantially C-shape that is open forward in a plan view; the cover member 122 is configured to be attachable to the main body 121.

The main body 121 includes: the

side portions

123, 124 are provided at positions apart from each other in the width direction (i.e., the left-right direction) of the inhalation device 100; a rear portion 125 which is located on the rear side of the side portions 123, 124 (i.e., the cleaner body portion 102 side), and connects these

side portions

123, 124. The

side portions

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

side portions

123, 124 and the rear portion 125.

A suction space 110 for sucking dust on the floor is formed based on the rear portion 125 and the

side portions

123, 124. That is, the suction space 110 is divided based on 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. The

brush rollers

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

side portions

123 and 124 support the

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 (i.e., the wall portions facing the suction space 110).

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

The cover member 122 is configured to cover the suction space 110 from the upper side. The left and right end portions of the cover member 122 are 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 clean dust while rolling on the floor surface in the suction space 110. The brush roller 131 is supported on one side by the left side portion 123, and extends rightward from the side portion 123 in the suction space 110. The brush roller 132 is supported on one side by the right side 124, and extends from the side 124 to the left in the suction space 110. The distal ends of the brush rolls 131, 132 are spaced apart from each other in the width direction of the inhalation device 100.

The structure of the brush roller 131 will be described with reference to fig. 2 to 6. Fig. 3 is a partial schematic plan view of the brush roller 131. Fig. 4 is a partially schematic cross-sectional view of the brush roller 131 in the axial direction of the brush roller 131. Fig. 5 is a partially exploded perspective view of the brush roller 131. Fig. 6 is a partial schematic cross-sectional view of the brush roller 131 in a direction orthogonal to the axis of the brush roller 131. Further, the structure of the brush roller 132 is the same as that of the brush roller 131. Accordingly, the following description related to the brush roller 131 is cited to the brush roller 132.

As shown in fig. 3, the brush roller 131 includes a connection shaft 250, a shaft portion 210 externally fitted to the connection shaft 250, a distal end cover member 240 attached to a distal end of the shaft portion 210, and a holder 220 externally fitted to the shaft portion 210.

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

In order to transmit the driving force of the driving mechanism to the shaft portion 210, the distal end portion of the connection shaft 250 is inserted into the shaft portion 210. A knurling process is performed on the outer circumferential surface of the distal end portion of the connection shaft 250 to prevent the connection shaft 250 from idling.

The shaft portion 210 has an outer peripheral surface that tapers toward the distal end, and the outer shape of the shaft portion 210 is substantially circular over the entire length of the cross section orthogonal to the axis of the shaft portion 210.

The shaft portion 210 has a shaft body 214 and an inner connecting portion 270 integrally formed with the shaft body 214.

The shaft body 214 includes a tapered tube portion 212 that gradually thickens from the distal end of the shaft body 214 toward the base end side and extends in the axial direction of the shaft body 214, and a base end ring portion 211 provided on the base end side of the tapered tube portion 212. The axial length of the tapered tube portion 212 is longer than the axial length of the base end ring portion 211. The tapered tube portion 212 and the base end ring portion 211 have tapered shapes that taper more toward the distal end of the shaft body 214, but the taper angle of the base end ring portion 211 is smaller than the taper angle of the tapered tube portion 212. That is, the outer peripheral surface of the base end ring portion 211 is closer to being parallel to the axis of the shaft portion 210 than the outer peripheral surface of the tapered tube portion 212.

As shown in fig. 4, the internal connection portion 270 is provided for connecting the connection shaft 250 to the shaft portion 210, and is integrally molded with the tapered tube portion 212 in the tapered tube portion 212 so as to be connected to the distal end portion (knurled portion) of the connection shaft 250. The internal connection portion 270 and the shaft portion 210 may be molded as follows: in the molds for molding them, the resin is injected in a state where the distal end portion of the connection shaft 250 after the knurling is disposed.

The holder 220 is externally fitted to the shaft 210. The holder 220 is provided for holding a plurality of brush bodies 230 extending in a spiral shape, and is formed in a tapered cylindrical shape separately from the shaft portion 210 as shown in fig. 5. The holder 220 is attached to the outer peripheral surface of the shaft 210 by being fitted to the shaft 210. The holder 220 holds the plurality of brush bodies 230 on the outer peripheral surface of the shaft 210 in a state of being externally fitted to the shaft 210.

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

The holder 220 is configured to have a tapered cylindrical shape that tapers toward the distal end in a state where the plurality of holding pieces 222 are arranged in the circumferential direction of the shaft portion 210 and are attached to the outer peripheral surface of the shaft portion 210. The holding pieces 222 are thin plate-like portions extending in a spiral shape. In other words, each of the plurality of holding pieces 222 is formed by spirally winding a thin plate having a trapezoidal shape, which is thinner toward the distal end of the shaft portion 210, around the outer peripheral surface of the shaft portion 210. An inner space 318 (see fig. 5) of the holder 220 surrounded by the plurality of holding pieces 222 arranged in the circumferential direction is complementary to the shaft portion 210, is circular in a cross section orthogonal to the axis of the holder 220, and has a shape that tapers toward the distal end.

Since the holding pieces 222 are arranged at intervals in the circumferential direction of the shaft portion 210, the spiral groove 221 is formed between adjacent holding pieces 222 (that is, between the side surfaces 291 of the holding pieces 222 facing each other in the circumferential direction). The spiral groove 221 extends spirally on the outer peripheral surface of the shaft 210, and the brush body 230 is disposed along the spiral groove 221. The orientation of the spiral groove 221 (and thus the shape of the retaining piece 222) is set as follows: when the brush roller 131 rotates in the direction indicated by the arrow in fig. 2, the brush body 230 sends out dust in the distal end direction of the shaft portion 210.

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; the outer peripheral portion 226 is located outside with respect to the inner peripheral portion 225 in the radial direction of the shaft portion 210, and is wider than the inner peripheral portion 225. The inner peripheral portion 225 constitutes an inner peripheral surface of the holding piece 222 in surface contact with an outer peripheral surface of the shaft portion 210, and the outer peripheral portion 226 constitutes an inner peripheral surface of the holding piece 222.

The side surface 291 of the holding piece 222 has a side surface of the side edge 292 of the outer peripheral portion 226 and a side edge 229 of the inner peripheral portion 225. The side edge portions 292 of the outer peripheral portion 226 protrude in the width direction of the spiral groove 221 with respect to the side edge surfaces 229 of the inner peripheral portion 225. That is, the side edge portions 292 of the outer peripheral portion 226 are configured as protruding strips protruding from the side edge surfaces 229 of the inner peripheral portion 225. The side edge 292 of the outer peripheral portion 226 and the side edge 229 of the inner peripheral portion 225 are configured to retain 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. Similarly, 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 spiral groove 221. The side edge surface 229 of the inner peripheral portion 225 of the adjacent holding piece 222 forms an inner peripheral side portion of the spiral groove 221, and the width of the spiral groove 221 is wide at the inner peripheral side portion. The side surfaces of the side edge portions 292 of the outer peripheral portions 226 of the adjacent holding pieces 222 form outer peripheral side portions of the spiral grooves 221, and the width of the spiral grooves 221 is narrow at the outer peripheral side portions. 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, a part of the brush body 230 is sandwiched in the radial direction of the shaft portion 210, whereby the brush body 230 is held on the outer peripheral surface of the shaft portion 210.

In order to maintain the inner peripheral portion 225 in a surface-contact state even when the side edge portion 292 of the outer peripheral portion 226 is subjected to an external force in a direction to separate it from 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 over the entire range in the longitudinal direction of the holding piece 222. 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 welded to the outer peripheral surface of the shaft portion 210 by ultrasonic welding.

Distal ends of the plurality of retaining tabs 222 are connected to an annular distal connection 223. The base ends of the plurality of holding pieces 222 are connected to an annular base end connection portion 224. Accordingly, the interval between the adjacent holding pieces 222 is maintained by the distal end connecting portion 223 on the distal end side and by the base end connecting portion 224 on the base end side. Accordingly, the width of the spiral groove 221 is maintained over the entire length. The spiral groove 221 communicates with the above-described internal space 318 of the holder 220 between the distal end connecting portion 223 and the base 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 1 tapered cylinder.

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

Since the base ends of the plurality of holding pieces 222 are connected to the inner peripheral edge of the annular base end connecting portion 224, the base ends of the spiral grooves 221 are concave portions 227 (see fig. 5) with the outer side surfaces closed. That is, the plurality of concave portions 227 are formed at intervals along the inner peripheral edge of the base end connecting portion 224. These recesses 227 can be utilized when extracting the mold portion (the spiral portion 282 shown in fig. 8) for forming the spiral groove 221.

The recess 227 may also serve to prevent rotation of the retaining body 220 relative to the shaft portion 210. That is, as shown in fig. 5, in order to prevent relative rotation between the holder 220 and the shaft portion 210, the plurality of convex portions 260 protrude from the outer peripheral surface of the base end ring portion 211 of the shaft portion 210 so as to engage with the plurality of concave portions 227, respectively. The 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 in accordance with the positions of the concave portions 227. The convex portion 260 fits into the concave portion 227 when the holder 220 is fitted to the shaft portion 210.

The plurality of brush bodies 230 respectively include: a base band 231 having an elongated rectangular shape and capable of being inserted into the spiral groove 221; a plurality of bristles 232 are planted on the base string 231. The base band 231 is a portion for being held by the holder 220. The plurality of bristles 232 are provided for cleaning dust.

The base band 231 has a width substantially equal to a width between the side edge surfaces 229 of the inner peripheral portions 225 of the adjacent holding pieces 222, and is disposed in a space between the side edge surfaces 229. The width of the base band 231 is wider than the gap between the side edge portions 292 of the outer peripheral portions 226 of the adjacent holding pieces 222. Therefore, when the base band 231 is disposed in the wide space of the spiral groove 221, the side edge portions 233 of the base band 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 piece 222 and the outer peripheral surface of the shaft portion 210.

The base band 231 has flexibility to be bent and deformed along the spiral groove 221 when inserted from the distal end portion of the spiral groove 221, and has rigidity to be kept engaged with the side edge portion 292 of the outer peripheral portion 226.

The plurality of bristles 232 are implanted in a central region (i.e., a region between both side edges 233) of the base tape 231 in the width direction along the longitudinal direction of the base tape 231, forming a brush row extending along the longitudinal direction of the base tape 231. When the brush body 230 is inserted into the spiral groove 221, the brush row protrudes from the space between the side edge portions 292 of the outer peripheral portions 226 of the adjacent holding pieces 222 (i.e., the portion where the width of the spiral groove 221 is narrow).

When the brush body 230 is inserted into the spiral groove 221 from the distal 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 is held by the holding body 220 in a state of extending spirally on the outer peripheral surface of the holding body 220. At this time, since the brush row is engaged with the base end connection portion 224, displacement of the brush body 230 in the base end direction is prevented by the base end connection portion 224. On the other hand, a distal end cover member 240 is provided to prevent displacement of the brush body 230 in the distal direction.

The opening of the distal end side of the spiral groove 221 is capped based on the distal end cap member 240. That is, the distal cap member 240 comprises; a disk-shaped restricting plate 241 having a diameter such as to cover the opening; the fitting portion 242 is fitted into the distal end portion of the shaft portion 210 via the opening of the annular distal end connecting portion 223 of the holder 220. Since the limiting plate 241 covers the opening of the distal end side of the spiral groove 221, the distal end of the base band 231 is engaged with the limiting plate 241, thereby preventing the brush body 230 from being displaced in the distal direction.

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

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

During this time, the driving mechanism built in the inhalation device 100 operates, 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 via the connection shaft 250 and the internal connection portion 270. At this time, the brush body 230 cleans dust on the ground while rolling on the ground.

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 tube portion 212 on the distal end side, and the outer peripheral surface of the base end ring portion 211 is in a state of being nearly parallel to the axis of the shaft portion 210. Therefore, the outer diameter of the base end of the shaft portion 210 can be reduced as compared with a tapered tube in which the tapered tube portion 212 is extended at a tapered angle. Therefore, the

brush rollers

131, 132 are prevented from being enlarged in the radial direction, and the housing 120 to which the

brush rollers

131, 132 are attached is prevented from being enlarged.

As described above, the spiral direction of the spiral groove 221 of the arrangement brush body 230 is set as follows: when the

brush rollers

131 and 132 rotate in the direction indicated by the arrows in fig. 2, dust is sent out in the distal direction. Therefore, the brush body 230 can promote movement of dust in the distal direction of the brush body 230 (i.e., in the direction toward the center position in the width direction of the suction space 110).

When the

brush rollers

131 and 132 clean dust on the floor, dust (for example, hair) of a long duration is 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 distal ends, the component of the winding force of the long dust tends to be directed toward the distal 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 distal ends of the

brush rollers

131 and 132.

Since the spiral grooves 221 in which the brush bodies 230 are disposed are formed at intervals in the circumferential direction of the

brush rollers

131 and 132, brush rows made up of a plurality of bristles 232 are also formed at intervals in the circumferential direction of the

brush rollers

131 and 132. Since the brush staples 232 are not provided over the entire circumference of the brush rolls 131 and 132, the load acting on the driving mechanism does not become excessive.

Although the shaft portion 210 and the holder 220 are formed separately from each other, since the recess 227 of the holder 220 is engaged with the projection 260 protruding from the outer peripheral surface of the shaft portion 210, the integral rotation of the shaft portion 210 and the holder 220 is ensured.

Since the shaft portion 210 is formed separately from the holder 220, a molding machine for molding the shaft portion 210 can be made without having a mechanism for forming the spiral groove 221. Therefore, the molding machine for molding the shaft portion 210 does not need to have a complicated structure.

The spiral groove 221 of the holder 220 communicates with the inner space 318 of the holder 220 between the distal end connecting portion 223 and the base end connecting portion 224. In this case, the spiral groove 221 and the inner surface of the holder 220 may be formed by a male die 280 as shown in fig. 8.

As shown in fig. 8, the male die 280 includes 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 screw portions 282 that spirally protrude from the outer peripheral surface of the main body portion 281. The main body portion 281 is a portion of the inner side surface of the molded holder 220, and the spiral portion 282 is a portion where the spiral groove 221 is formed.

The holder 220 can be molded by injecting a resin into a cavity between the male mold 280 and a female mold (not shown) that molds the outer surface of the holder 220. After the holding body 220 is molded, the male mold 280 is pulled out from the female mold that molds the outer surface of the holding body 220. Thereafter, when the holder 220 is pulled out of the male die 280 while relatively rotating about the axis of the male die 280, the holder 220 is separated from the male die 280. Since the screw portion 282 is not provided in the master model, it is difficult to cause a problem that the holder 220 remains in the master model in a state of being caught by the screw portion 282.

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

At this time, since the brush row formed of the plurality of bristles 232 protrudes from the spiral groove 221, it contacts the base end connection portion 224, and movement of the brush body 230 toward the base end side is prevented. Thereafter, by attaching the distal end cover member 240 to the distal ends of the holder 220 and the shaft portion 210, movement of the brush body 230 toward the distal end side is also prevented.

When the bristles 232 rub against the ground, the bristles 232 receive an external force from the ground. The external force is transmitted to the base tape 231 in which the bristles 232 are planted. The external force also acts to tilt the base band 231 about the axis of the base band 231. In this case, one side edge 233 of the base band 231 is pressed against the side edge 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 lift up from the outer peripheral surface of the shaft portion 210. That is, the side edge portion 233 of the base band 231 is maintained in a state sandwiched by the outer peripheral surface of the shaft portion 210 and the outer peripheral portion 226 of the holding piece 222, thereby preventing the base band 231 from falling off from the spiral groove 221.

In the above embodiment, the holding body 220 is formed of 6 holding pieces 222, but the holding body 220 may be formed of 2 or more holding pieces 222.

In the above embodiment, the brush body 230 is disposed in the spiral groove 221. Alternatively, the brush body 230 may be fixed to the outer peripheral surface of the holder 220 with an adhesive or the like.

In the above embodiment, the holder 220 has a cylindrical structure in which the plurality of holding pieces 222 are integrated by the distal end connecting portion 223 and the base 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 in a tapered cylindrical shape that tapers distally at a constant taper angle. A plurality of engaging recesses 213 are formed in the outer peripheral surface of the shaft 210 at positions corresponding 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 the plurality of holding pieces 222 are each formed in a spiral plate shape elongated in the axial direction of the shaft portion 210. The holding pieces 222 are formed in a tapered cylindrical shape that tapers distally in a state of being arranged at intervals in the circumferential direction of the shaft portion 210, and extend in a spiral shape so as to be arranged along the outer peripheral surface of the shaft portion 210.

The holding piece 222 has an engagement protrusion 228 protruding from an inner side surface (i.e., a surface abutting against an outer peripheral surface of the shaft portion 210) of the holding piece 222. The engagement convex portion 228 is configured to be engageable with the engagement 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 6, and when the holding piece 222 is attached to the outer peripheral surface of the shaft portion 210 with a gap therebetween, a spiral groove 221 is formed between the side surfaces 291 of adjacent holding pieces 222 (see fig. 5).

The plurality of holding pieces 222 may be formed in 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 molded.

In the case of using the split structure of the holding piece 222 as shown in fig. 9, the holding piece 222 is easily molded, and therefore, the spiral groove 221 can be formed on the outer side surface of the holding piece 222 (see fig. 10). In this case, the plurality of holding pieces 222 may be adjacently arranged in the circumferential direction of the shaft portion 210.

The spiral groove 221 has the same shape as the spiral groove 221 shown in fig. 3 and 5. That is, the spiral groove 221 extends in a spiral shape. In a cross section orthogonal to the axis of the shaft portion 210, the spiral groove 221 is formed so as to have a narrow groove width in the vicinity of the outer side surface of the holding piece 222, and a wide groove width is formed on the shaft portion 210 side with respect to the narrow groove width portion.

When the spiral groove 221 is formed in this manner, when the base tape 231 of the brush body 230 is inserted into a wide space, both side edge portions 233 of the base tape 231 engage with the holding pieces 222 in the spiral groove 221. That is, the brush body 230 is held based on the holding piece 222.

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

The holder 220 shown in fig. 11 has holding

cylinders

311, 312 and a base end cylinder 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. 5. That is, the holding

cylinders

311, 312 and the base end cylinder 313 are fitted to the shaft 210 in a state of being connected to each other in the axial direction of the shaft 210.

The base end cylinder 313 has a substantially cylindrical shape. On the other hand, the holding

cylinders

311, 312 are formed in tapered cylindrical shapes which taper toward the distal end. The holding

cylinders

311, 312 are configured to be incapable of having a step between their outer peripheral surfaces and inner peripheral surfaces, and to be integrally formed into a tapered cylinder when they are continuously fitted externally to the shaft portion 210.

A plurality of linear 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 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. These linear grooves 314 to 316 are identical in shape to the spiral groove 221 shown in fig. 10 in a cross section orthogonal to the extending direction of the linear grooves 314 to 316.

Although the linear grooves 314 to 316 are linearly extended, their extended arrangement angles are different from each other. Specifically, the linear grooves 314 to 316 are configured to be spirally continuous when the holding

cylinders

311, 312 and the base end cylinder 313 are continuously provided in the axial direction of the shaft portion 210. These linear grooves 314 to 316 form a bent groove space between the holding

cylinders

311 and 312 and between the holding cylinder 312 and the base end cylinder 313, but since the base band 231 of the brush body 230 has flexibility, it can be inserted along the bent groove portion 317. Accordingly, the brush body 230 is disposed 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 linear grooves 314 to 316 are provided to extend linearly, a mold portion (not shown) for forming the linear grooves 314 to 316 can be pulled out linearly in the extending direction of the linear grooves 314 to 316 when the holding

cylinders

311, 312 and the base end cylinder 313 are molded. Therefore, the holding

cylinders

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

Since the base end cylinder 313 is substantially cylindrical, not tapered, the molding machine for molding the base end cylinder 313 and the shaft portion 210 does not become excessively complicated even if it is integrally molded with the shaft portion 210. Therefore, the base end cylinder 313 may be integrally molded with the shaft portion 210.

Instead of the base end cylinder 313, an additional holding cylinder may be used. In this case, the additional holding cylinder is configured such that the inner peripheral surface and the outer peripheral surface cannot be stepped with respect to the holding cylinder 312. The additional holding cylinder may be configured such that when the additional holding cylinder is externally fitted to the shaft portion 210 continuously with the holding

cylinders

311, 312, the whole of them forms a tapered cylinder.

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 the position where the linear 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.

In the above embodiment, the holder 220 is a resin molded product. Alternatively, as shown in fig. 12, the holder 220 may be formed of a sheet-like material formed in a substantially fan-like shape so as to be wound around the outer peripheral surface of the shaft 210. The sheet material has flexibility capable of being deformed 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-like manner in the holder 220 in a flat state. The region in which the plurality of bristles 232 are implanted may be defined so that a brush row extending in a spiral shape can be obtained when the holder 220 is wound around the outer peripheral surface of the shaft 210.

The bristles 232 can be easily set in the holder 220 when the holder 220 is in a flat state. Therefore, the holder 220 holding the brush body 230 is easily formed. By winding the holder 220 around the outer peripheral surface of the shaft 210, the brush roller 131 is easily manufactured.

The above-described embodiment mainly has the following configuration.

The brush roller according to one aspect of the above embodiment is configured to clean dust while rolling. The brush roll includes: a shaft portion having an outer peripheral surface which is thinner toward the distal end; a holder attached to the outer peripheral surface of the shaft portion; and a brush body which is held by the holding body in a manner of extending in a spiral shape along the outer peripheral surface of the holding body.

According to the above configuration, the holding body for holding the brush body is configured to be attached to the shaft portion body together with the shaft portion body. Therefore, there is no need to provide a structure for holding the brush body in the shaft portion. Therefore, the complexity of the mold for molding the shaft portion can be suppressed.

In the above configuration, the holding body may include a pair of holding pieces that are attached to the outer peripheral surface of the shaft portion so as to be adjacent to each other with a gap therebetween in the circumferential direction of the shaft portion. Among the pair of holding pieces, a pair of side surfaces facing each other in the circumferential direction may be formed with spiral grooves extending in a spiral shape. The brush body may be held between the pair of sides.

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 on the outer peripheral surface of the shaft portion and between the holding pieces. The brush body is disposed along the spiral groove and extends in a spiral shape. The brush body is held on the outer peripheral surface of the shaft portion by the side surfaces of the pair of holding pieces in this state.

In the above-described configuration, the brush body may include a base tape and a plurality of bristles implanted along a longitudinal direction of the base tape. The pair of holding pieces may have: an outer peripheral portion at a portion of the spiral groove on an outer peripheral side; and an inner peripheral portion formed on an inner peripheral side of the spiral groove having a wider width than the outer peripheral side. The width of the base band may be wider than the portion of the spiral groove on the outer peripheral side, and the base band may be disposed between the inner peripheral portions. The plurality of bristles may protrude from the spiral groove through gaps between the outer circumferential portions.

According to the above configuration, the width of the portion on the inner peripheral side formed by the inner peripheral portions of the pair of holding pieces in the spiral groove is wider than the width of the portion on the outer peripheral side formed by the outer peripheral portions of the pair of holding pieces. Therefore, both side edge portions of the base tape 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 is held by the holding portion on the shaft portion. On the other hand, the plurality of bristles protrude from the spiral groove through the gaps of the outer peripheral portion, and thus, when the brush roller rolls, it can clean dust.

In the above configuration, the inner peripheral portions of the pair of holding pieces may be 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 range in the longitudinal direction of the pair of holding pieces.

According to the above configuration, since the inner peripheral portions of the pair of holding pieces are fixed to the outer peripheral surface of the shaft portion in a state in which the entire range in the longitudinal direction of the pair of holding pieces is in surface contact with the outer peripheral surface of the shaft portion, deformation of the pair of holding pieces, for example, such that the width of the spiral groove is enlarged, can be suppressed. Therefore, the baseband can be prevented from falling off the spiral groove.

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

According to the above configuration, the pair of holding pieces are connected to each other by the distal end connecting portion and the proximal end connecting portion, and therefore, the holding body can be handled as 1 member. Further, since the distal end connecting portion and the proximal end connecting portion maintain the distance between the distal end side and the proximal end side of the pair of holding pieces, the holding body can be attached to the outer peripheral surface of the shaft portion while maintaining the width of the spiral groove over the entire length of the spiral groove.

In the above configuration, the holding body may have a tapered cylindrical shape having a circular inner space in a cross section orthogonal to the axis of the shaft portion. The spiral groove may be formed to communicate with the inner space in a section between the distal end connecting portion and the base end connecting portion.

According to the above configuration, when the holder is formed in the tapered tubular shape, the spiral groove can be formed so as to communicate with the inner space of the tapered tubular shape in the section between the distal end connecting portion and the proximal end connecting portion. In this case, the outer surface of the holder can be molded by a female mold, and the spiral groove and the inner peripheral surface of the holder can be molded by a male mold. The male die may be formed of a main body portion forming an inner space of the holder and a screw portion spirally protruding from an outer peripheral surface of the main body portion to form a screw groove. The main body portion has a shape complementary to the internal space of the holding body, and thus has a circular cross section in a cross section orthogonal to the axis of the shaft portion, and has a shape rotatable about the axis of the main body portion in the holding body. Therefore, the male die can be allowed to be pulled out from the holding body along the axial direction of the holding body while rotating the main body portion around the axis of the shaft portion in accordance with the spiral shape of the spiral portion.

In the above configuration, the brush roller may further include: a protruding portion protruding from an outer peripheral surface of the shaft portion. The holding body may have a concave portion that engages with the convex portion.

According to the above configuration, the protruding portion and the recessed portion are engaged with each other, so that the shaft portion can be prevented from rotating relative to the holder.

In the above configuration, the shaft portion may be configured to have a taper angle on the base end side smaller than a taper angle on the distal end side.

According to the above configuration, the taper angle of the shaft portion on the base end side is relatively small, and the outer peripheral surface of the brush roller is in a state of being nearly parallel to the axis of the brush roller at a portion where the taper angle is small. In this case, the diameter of the brush roller on the base end side is smaller than that of a cylindrical body extending on the base end side with the taper angle on the distal end side maintained, and the increase in the size of the brush roller in the radial direction is suppressed.

In the above configuration, the pair of holding pieces may be attached to the outer peripheral surface of the shaft portion in a state of not being connected 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 molded as plate-shaped members that can be disposed along the outer peripheral surface of the shaft portion.

In the above configuration, the brush roller may further include: a plurality of brush bodies, including the brush body. The holder may include a plurality of holding pieces formed in a spiral plate shape. The plurality of holding pieces may be arranged in a circumferential direction of the shaft portion in a state of not being coupled to each other, and mounted to the outer peripheral surface of the shaft portion. A spiral groove extending in a spiral shape may be formed on an outer side surface of each of the plurality of holding pieces. The plurality of brush bodies may be disposed along the spiral groove and held by the plurality of holding pieces, respectively.

According to the above configuration, the plurality of holding pieces are not connected to each other, and therefore can be molded as a spiral plate-like member. It is easier to form the spiral groove in such a spiral plate-like member than to form the spiral groove in the outer peripheral surface of the tapered cylindrical 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 a plurality of brush bodies are arranged along the spiral grooves, each brush body is in a state of extending in a spiral shape. The brush body is held on the outer peripheral surface of the shaft portion in this state.

In the above configuration, the holding body may have a plurality of holding cylinders arranged in an axial direction of the shaft portion. A linear groove may be formed in an outer peripheral surface of each of the plurality of holding cylinders, the linear groove extending linearly in a direction inclined with respect to the axial direction. The linear grooves 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 disposed along the linear grooves in a state of being spirally connected, and may be held by the plurality of holding cylinders.

According to the above configuration, the holding body has a plurality of holding cylinders arranged in the axial direction. That is, the holder is divided in the axial direction of the shaft portion. In this case, the linear grooves 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 straight line grooves are connected in a spiral manner to form a spiral groove. Since the linear groove extends linearly, the mold portion forming the linear groove may be pulled out linearly along the extending direction of the linear groove. As a result, the mold portion forming the linear groove can be easily separated from each holding cylinder.

In the above configuration, the holding member may be made of a sheet-like material having flexibility so as to wind the outer peripheral surface of the shaft portion. When the holder is wound around the outer peripheral surface of the shaft portion, the brush may extend spirally along the outer peripheral surface of the holder.

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

Industrial applicability

The principle of the present embodiment is preferably applied to a device for cleaning operations.

Claims

1. A brush roller configured to roll while cleaning dust, comprising:

a shaft portion having an outer peripheral surface which is thinner toward the distal end;

a holder attached to the outer peripheral surface of the shaft portion; the method comprises the steps of,

the brush body is held by the holding body in a manner of extending spirally along the outer peripheral surface of the holding body.

2. The brushroll of claim 1, wherein:

the holding body includes a pair of holding pieces mounted on the outer peripheral surface of the shaft portion so as to be adjacent to each other with a gap therebetween in a circumferential direction of the shaft portion,

in the pair of holding pieces, a spiral groove extending in a spiral shape is formed on a pair of side surfaces facing each other in the circumferential direction,

the brush body is held between the pair of sides.

3. The brushroll of claim 2, wherein:

the brush body comprises a base band and a plurality of bristles which are planted along the long side direction of the base band,

the pair of holding pieces each have: an outer peripheral portion at a portion of the spiral groove on an outer peripheral side; and an inner peripheral portion formed on an inner peripheral side of the spiral groove having a wider width than the outer peripheral side,

the width of the base band is wider than the outer peripheral side portion of the spiral groove, and the base band is arranged between the inner peripheral portions,

the plurality of bristles protrude from the spiral groove through gaps between the outer peripheral portions.

4. A brushroll according to claim 3, wherein:

the inner peripheral portions of the pair of holding pieces are 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 range in the longitudinal direction of the pair of holding pieces.

5. The brush roll according to any one of claims 2 to 4, wherein:

the holding body includes a distal end connecting portion connecting distal end portions of the pair of holding pieces to each other and a base end connecting portion connecting base end portions of the pair of holding pieces to each other.

6. The brushroll of claim 5, wherein:

the holder has a tapered cylindrical shape having a circular inner space in a cross section orthogonal to an axis of the shaft portion,

the spiral groove is formed to communicate with the inner space in a section between the distal end connecting portion and the base end connecting portion.

7. The brush roll according to any one of claims 1 to 6, characterized by further comprising:

a protruding portion protruding from an outer peripheral surface of the shaft portion; wherein,,

the holding body is formed with a concave portion that engages with the convex portion.

8. The brush roll according to any one of claims 1 to 7, wherein:

the shaft portion is configured to have a taper angle on a base end side smaller than a taper angle on a distal end side.

9. The brush roll 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 of not being connected to each other.

10. The brushroll of claim 1, further comprising:

a plurality of brush bodies including the brush body; wherein,,

the holding body comprises a plurality of holding pieces formed into a spiral plate shape,

the plurality of holding pieces are arranged in a circumferential direction of the shaft portion in a state of not being coupled to each other, and are attached to the outer peripheral surface of the shaft portion,

a spiral groove extending spirally is formed on the outer side surface of each of the plurality of holding pieces,

the plurality of brush bodies are arranged along the spiral groove and are respectively held by the plurality of holding pieces.

11. The brushroll of claim 1, wherein:

the holding body has a plurality of holding cylinders arranged in an axial direction of the shaft portion,

a linear groove extending linearly in a direction inclined with respect to the axial direction is formed in an outer peripheral surface of each of the plurality of holding cylinders,

in a state where the plurality of holding cylinders are arranged in the axial direction, the linear grooves of the plurality of holding cylinders are connected in a spiral,

the brush body is disposed along the linear grooves in a state of being spirally connected, and is held by the plurality of holding cylinders.

12. The brushroll of claim 1, wherein:

the holder is formed of a sheet-like material having flexibility so as to wind the outer peripheral surface of the shaft portion,

when the holder is wound around the outer peripheral surface of the shaft portion, the brush body extends spirally along the outer peripheral surface of the holder.