JP2008188319A - Suction tool for cleaner and vacuum cleaner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a suction tool for a cleaner excellent in a traveling performance during forward and backward movements and a dust removing performance by continuously and smoothly rotationally driving a second rotary brush when rotationally driving a first rotary brush, and a vacuum cleaner. <P>SOLUTION: The suction tool 15 for the cleaner comprises the first rotary brush 30 provided with a plurality of first cleaning pieces 31 along the longitudinal direction of a peripheral surface and rotationally driven by a drive source 24 and the second rotary brush 35 provided with a plurality of second cleaning pieces 36 in the longitudinal direction of the peripheral surface and disposed in parallel with the first rotary brush 30. As the first rotary brush 30 is rotationally driven by the drive source 24, the second cleaning pieces 36 of the second rotary brush 35 are continuously engaged with or between the plurality of first cleaning pieces 31 in the first rotary brush 30 and pressurized from the back surface side of a rotating direction by the first cleaning pieces 31, and thus the second rotary brush 35 is smoothly rotationally driven. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a vacuum cleaner suction tool and a vacuum cleaner.

  A conventional suction tool for a vacuum cleaner is provided with a single rotating brush that is driven to rotate by an electric motor or the like, and the cleaning piece provided in the longitudinal direction of the outer periphery of the rotating brush is used to scrape dust on the surface to be cleaned. . However, since the surface to be cleaned cannot be sufficiently cleaned with only one rotating brush, an apparatus having two rotating brushes in parallel has been invented. However, if two electric motors are used to rotate each of the two rotating brushes, there is a problem that the vacuum cleaner suction tool becomes heavy and the operability of the vacuum cleaner suction tool is deteriorated.

  Therefore, for example, in the vacuum cleaner suction tool 50 disclosed in Patent Document 1, as shown in FIG. 11, the first rotary brush 53 that is rotationally driven by the electric motor 51 and provided with a cleaning piece 52 on the outer periphery, Similarly, a second rotating brush 55 provided with a cleaning piece 54 on the outer periphery is provided in parallel, and the cleaning piece 52 and the cleaning piece 54 are overlapped with each other, so that the rotational force of the first rotating brush 53 is increased to the second rotating brush. The second rotating brush 55 is rotated by being transmitted to 55.

Further, in the vacuum cleaner suction tool 60 disclosed in Patent Document 2, as shown in FIG. 12, a plurality of rotating brushes 61 and 62 having different rotational directions and rotational speeds are arranged in parallel to the surface to be cleaned. The blades 61b and 62b of the rotating brushes 61 and 62 are attached to the rotating rods 61a and 62a by twisting. In the vacuum cleaner suction tool 60, one end of the first rotating brush 61 is connected to the electric motor 68 through a transmission mechanism including the gear 63 and the pulley 64, the belt 65, and the pulley 66, and the other end. The rotation shaft end 61 c is supported by a bearing 69. One end of the second rotating brush 62 is screwed into the gear 63 via the gear 70, and the other rotating shaft end 62 c is supported by the bearing 69. And the 1st and 2nd rotating brush 61, 62 of the suction tool 60 for vacuum cleaners comprised in this way is rotated in the mutually opposite direction via the gears 63,70.
JP 2003-125991 A Japanese Patent Laid-Open No. 5-111449

  However, in the configuration of the vacuum cleaner suction tool 50 described in Patent Document 1, the cleaning pieces 52 and 54 are overlapped to transmit the rotational force of the first rotary brush 53 to the second rotary brush 55. Since the second rotary brush 55 is rotated, particularly when the surface to be cleaned is a carpet or the like, the cleaning piece 54 is likely to bite into the carpet, and the second rotary brush 55 is difficult to rotate. There was a problem that the rotation could not be obtained and the cleaning performance could not be exhibited sufficiently.

  Further, since the cleaning piece 54 bites into the carpet, a large load is applied to the second rotating brush 55, so that the rotational force of the first rotating brush 53 that rotationally drives it decreases or the first rotating brush 53. An excessive load was also applied to the motor 51 that rotationally drives the motor 51, causing problems such as abnormal heat generation or burning out of the motor 51.

  Further, in the configuration of the vacuum cleaner suction tool 60 described in Patent Document 2, the first and second rotary brushes 61 and 62 are rotated in opposite directions via gears 63 and 70, and thus continuously. However, when the surface to be cleaned is a carpet or the like, the blades 61b and 62b are likely to bite into the carpet and become difficult to rotate, so an excessive load is applied to the gears 63 and 70 and the bearing 69, resulting in wear and tear. There is a problem that it is easy to cause a mechanical failure. In particular, in the case of the vacuum cleaner suction tool 60, the blades 61b and 62b of the first and second rotating brushes 61 and 62 are formed by twisting the rotating rods 61a and 62a. Since an axial load is also applied to 69 and this axial load changes due to a change in the surface to be cleaned, mechanical failure is more likely to occur.

  The present invention solves the above-described conventional problems, and when the first rotating brush is driven to rotate, the second rotating brush is continuously driven to rotate smoothly, and traveling performance and dust during forward and backward movement An object of the present invention is to provide a vacuum cleaner suction tool and a vacuum cleaner that are excellent in removal performance.

  In order to solve the above-mentioned conventional problems, a suction tool for a vacuum cleaner according to claim 1 of the present invention has a suction opening body formed on a bottom surface and moved forward and backward on a surface to be cleaned, and the opening. A first rotating brush having a plurality of first cleaning pieces along the longitudinal direction of the peripheral surface, the shaft core being pivotally supported perpendicularly to the advancing and retreating direction of the suction tool body, and rotatable in the portion; A driving source that rotates one rotating brush, and a second cleaning piece that is rotatably supported in the opening and is supported in parallel with the first rotating brush and has a plurality of second cleaning pieces in the longitudinal direction of the circumferential surface. Two rotating brushes, and the second cleaning piece of the second rotating brush is driven by the rotation of the first rotating brush, and the plurality of first cleaning pieces in the first rotating brush or The back surface in the rotational direction is continuously meshed between them by the first cleaning piece By being pressed from and is characterized in that said second rotary brush can be smoothly rotated driven by the first rotating brush.

  According to the suction tool for a vacuum cleaner configured as described above, the second cleaning piece of the second rotating brush is moved along with the rotational driving of the first rotating brush. 1 cleaning piece or continuously meshed between them and being pressed from the back side, it is smoothly driven to rotate with the rotation of the first rotating brush. It can be excellent.

  In addition, since the rotational force of the first rotating brush is used for the rotation of the second rotating brush without using a gear, the second rotating brush rotates when the surface to be cleaned is a carpet or the like. Even if it becomes difficult, an excessive load is not applied to the portion that pivotally supports the second rotating brush, and a mechanical failure is not caused.

  A vacuum cleaner suction tool according to a second aspect of the present invention is the vacuum cleaner suction tool according to the first aspect, wherein the first cleaning piece of the first rotating brush approaches the center side in the longitudinal direction. And the second cleaning piece of the second rotating brush is formed in a shape that continuously changes to the receding angle side and / or the advancing angle side with respect to the rotation direction. 1 having a shape opposite to that of the cleaning piece 1 and continuously changing from the rotational direction toward the receding angle side and / or the advancing angle side with respect to the central side in the longitudinal direction. As the first cleaning brush is driven to rotate, a plurality of first cleaning pieces of the first rotating brush or a plurality of the first cleaning pieces are continuously meshed with each other, and the first cleaning brush is engaged with the first cleaning brush. By being pressed from the back side in the rotational direction by a piece And it is characterized in that said second rotary brush can be smoothly rotated driven by the first rotating brush.

  According to the vacuum cleaner suction tool configured as described above, the first tool is formed in a shape that continuously changes to the receding angle side and / or the advancing angle side with respect to the rotational direction as approaching the center side in the longitudinal direction. When the first rotating brush having the cleaning piece is driven to rotate, the shape of the first rotating brush is continuously changed to the receding angle side and / or the advancing angle side with respect to the rotating direction as the first rotating brush moves closer to the center side in the longitudinal direction (first A second rotating brush having a second cleaning piece formed in a shape opposite to that of the first cleaning piece is continuously meshed with the first cleaning piece of the plurality of strips, or the back surface thereof. It is pressed from the side and is smoothly driven to rotate in the opposite direction to the first rotating brush. Accordingly, the dust on the surface to be cleaned is blown between the first rotating brush and the second rotating brush by continuous and smooth rotation of the first and second rotating brushes, and the dust is leaked to the outside. Therefore, the dust removal performance of the vacuum cleaner suction tool can be greatly improved.

  The vacuum cleaner suction tool according to claim 3 of the present invention is the vacuum cleaner suction tool according to claim 2, wherein the first cleaning piece of the first rotating brush and the second rotating brush In the two cleaning pieces, the shape that continuously changes toward the receding angle side and / or the advancing angle side with respect to the rotation direction sandwiches the intermediate point in the longitudinal direction between the first rotating brush and the second rotating brush. It is characterized by being bilaterally symmetric.

  According to the vacuum cleaner suction tool configured as described above, the load (thrust load) applied to the first rotating brush and the second rotating brush in the axial direction is not changed, and the load balance in the axial direction is changed. There is no. Therefore, traveling performance can be improved together with dust removal performance of the vacuum cleaner suction tool.

  The vacuum cleaner suction tool according to claim 4 of the present invention is the vacuum cleaner suction tool according to any one of claims 1 to 3, wherein the first cleaning piece of the first rotating brush is: The second cleaning piece of the second rotating brush is formed in a substantially V shape or a substantially U shape that is displaced toward the receding angle side with respect to the rotation direction as approaching the center side in the longitudinal direction. The first cleaning piece of the first rotating brush is formed in a substantially V-shape or substantially U-shape opposite to the first cleaning piece of the first rotating brush, and the second cleaning piece of the second rotating brush is driven to rotate the first rotating brush. Accordingly, the plurality of first cleaning pieces in the first rotating brush or continuously meshed between them and being pressed from the back side in the rotational direction by the first cleaning piece, The second rotating brush is smoothly driven to rotate by the first rotating brush. And it is characterized in and.

  According to the vacuum cleaner suction tool configured as described above, when the first rotary brush having the first cleaning piece formed in a substantially V-shape or a substantially U-shape is rotationally driven, the suction tool is also substantially V-shaped. A second rotating brush having a second cleaning piece formed in a letter shape or substantially U shape (substantially V shape or substantially U shape opposite to the first cleaning piece) is formed of the plurality of strips. The first cleaning pieces or the first cleaning pieces are continuously meshed with each other, pressed from the back side, and smoothly rotated in the opposite direction to the first rotating brush. Therefore, the dust on the surface to be cleaned is blown between the first rotating brush and the second rotating brush by the continuous and smooth rotation of the first and second rotating brushes, and the dust is leaked to the outside. Therefore, the dust removal performance of the vacuum cleaner suction tool can be greatly improved.

  The vacuum cleaner suction tool according to claim 5 of the present invention is the vacuum cleaner suction tool according to claim 1 or 2, wherein the first cleaning piece of the first rotating brush is at one end in the longitudinal direction. And the second cleaning piece of the second rotating brush is the first rotating brush of the first rotating brush. The second cleaning piece of the second rotating brush is formed in a plurality of strips in the first rotating brush as the first rotating brush is driven to rotate. The second cleaning brush is moved by the first rotating brush by being engaged with the first cleaning piece or continuously between them and being pressed by the first cleaning piece from the back side in the rotational direction. It is characterized by being smoothly driven to rotate.

  According to the vacuum cleaner suction tool configured in this manner, when the first rotary brush having the first cleaning piece formed in a substantially spiral shape is driven to rotate, the suction tool is also substantially spiral (the first cleaning tool). A second rotating brush having a second cleaning piece formed in a substantially spiral shape opposite to the piece is continuously meshed with the first cleaning piece of the plurality of strips or the back side thereof. And is smoothly driven to rotate in the opposite direction to the first rotating brush. Therefore, the dust on the surface to be cleaned is blown between the first rotating brush and the second rotating brush by the continuous and smooth rotation of the first and second rotating brushes, and the dust is leaked to the outside. Therefore, the dust removal performance of the vacuum cleaner suction tool can be greatly improved.

  The vacuum cleaner suction tool according to claim 6 of the present invention is the vacuum cleaner suction tool according to any one of claims 1 to 5, wherein the first rotary brush has a tubular or rod-shaped shaft core. A plurality of rib strips projecting outwardly from the outer peripheral surface of the shaft core member, and two adjacent rib strips as a pair, projecting toward the other side of the surfaces facing each other And a base end portion of the first cleaning piece is inserted into a space formed between a pair of adjacent rib strip portions and a hook-shaped portion.

  According to the vacuum cleaner suction tool configured as described above, the first cleaning piece is easily assembled to the shaft core material of the first rotating brush by inserting the base end portion into the mounting space. Further, when replacement is necessary, it is easily removed from the shaft core material by being extracted from the mounting space.

  The vacuum cleaner suction tool according to claim 7 of the present invention is the vacuum cleaner suction tool according to claim 6, wherein among the rib strips forming a pair of the first rotary brush, A support strip that protrudes outward and supports the first cleaning piece from the back side is formed on the rib portion of the rib strip located on the back side.

  According to the vacuum cleaner suction tool configured as described above, the first cleaning piece is supported by the support strip from the back side when being driven to rotate, and is prevented from being bent toward the back side. In addition to scooping up dust on the surface to be cleaned, a rotational force that advances the vacuum cleaner suction tool can be applied to the surface to be cleaned to improve self-propelled performance.

  The vacuum cleaner suction tool according to claim 8 of the present invention is the vacuum cleaner suction tool according to any one of claims 1 to 7, wherein the second rotating brush has a tubular or rod-shaped shaft core. A plurality of rib strips projecting outward from the outer peripheral surface of the shaft core material, and two adjacent rib strips as a pair, projecting toward the other side of the surfaces facing each other And a base end portion of the second cleaning piece is inserted into a space formed between a pair of adjacent rib strip portions and a hook-shaped portion.

  According to the vacuum cleaner suction tool configured as described above, the second cleaning piece is easily assembled to the shaft core material of the second rotary brush by inserting the base end portion into the mounting space. Further, when replacement is necessary, it is easily removed from the shaft core material by being extracted from the mounting space.

  The vacuum cleaner suction tool according to claim 9 of the present invention is the vacuum cleaner suction tool according to any one of claims 6 to 8, wherein the second cleaning piece of the second rotating brush is the vacuum cleaner suction tool. The plurality of fibrous portions of the first rotating brush or the surfaces on which the rib portions are not formed are engaged with each other between the adjacent rib strip portions facing each other.

  According to the suction tool for a vacuum cleaner configured in this way, the rib portion is not formed between the plurality of first cleaning pieces (rib strips) in the first rotating brush. Can be reliably meshed between a plurality of fibrous portions of the first rotating brush, or between rib portions where the rib portions are not formed.

  A vacuum cleaner suction tool according to a tenth aspect of the present invention is the vacuum cleaner suction tool according to any one of the first to ninth aspects, wherein the second cleaning piece and the object to be covered when rotated are driven. The contact resistance with the cleaning surface is set smaller than the contact resistance between the first cleaning piece and the surface to be cleaned.

  According to the vacuum cleaner suction device configured as described above, the load applied to the second rotary brush is reduced, and thereby the load applied to the first rotary brush that rotationally drives the second rotary brush is also reduced. The second rotating brush rotates efficiently, and the dust removal performance can be greatly improved.

  The vacuum cleaner suction tool according to claim 11 of the present invention is the vacuum cleaner suction tool according to any one of claims 1 to 10, wherein the first cleaning piece of the first rotating brush and the vacuum cleaner suction tool are the same. The second cleaning piece of the second rotating brush includes a fibrous portion composed of a plurality of fibers raised from the base end portion.

  According to the vacuum cleaner suction tool configured as described above, when the first and second rotary brushes are rotationally driven, the surface to be cleaned is caused by the fibrous portions provided in the first and second cleaning pieces. The upper dust can be blown off between the first rotating brush and the second rotating brush, scraped up, and reliably removed.

  The vacuum cleaner suction tool according to claim 12 of the present invention is the vacuum cleaner suction tool according to any one of claims 1 to 10, wherein the first cleaning piece of the first rotating brush is: A second cleaning piece of the second rotating brush is provided with a fibrous portion composed of a plurality of fibers raised from the proximal end portion, and is configured to include a blade-like portion extending from the proximal end portion. Configured.

  According to the vacuum cleaner suction tool configured as described above, when the first and second rotary brushes are driven to rotate, the blade-like portion provided in the first cleaning piece and the second cleaning piece are provided. With the formed fibrous portion, dust on the surface to be cleaned can be blown off between the first rotating brush and the second rotating brush, scraped up, and reliably removed. Moreover, since the braid | blade part of a 1st cleaning piece is harder to bend than the fibrous part of a 2nd cleaning piece, it can improve the self-propelled property to the front direction of the suction tool for cleaners.

  The vacuum cleaner suction tool according to claim 13 of the present invention is the vacuum cleaner suction tool according to claim 11 or 12, wherein the fibrous portion constituting the second cleaning piece of the second rotating brush is provided. , Which is thinned out along the longitudinal direction of the second rotating brush and is intermittently formed as a plurality of fiber bundles.

  According to the suction tool for a vacuum cleaner configured as described above, the second rotating brush can be flexed flexibly, so that the load applied to the second rotating brush is reduced, thereby rotating the second rotating brush. The load applied to the first rotating brush is also reduced, and the first and second rotating brushes rotate efficiently, and the dust removal performance can be greatly improved.

  A vacuum cleaner suction tool according to a fourteenth aspect of the present invention is the vacuum cleaner suction tool according to the thirteenth aspect, wherein the second cleaning piece of the second rotating brush is intermittently raised in the fibrous portion. The plurality of fiber bundles that are overlapped with each other in the plurality of second cleaning pieces are shifted in their raised positions and cover the entire width of the second rotating brush in the longitudinal direction as a whole. .

  According to the vacuum cleaner suction tool configured as described above, the dust on the surface to be cleaned is not leaked in the entire width region of the first and second rotary brushes by the rotation of the first and second rotary brushes. Since it can scrape up efficiently, dust removal performance can be improved.

  The vacuum cleaner which concerns on this invention is equipped with the electric blower and the suction tool for vacuum cleaners of any one of the said Claims 1-14.

  According to the vacuum cleaner suction tool configured as described above, by using the vacuum cleaner suction tool excellent in running performance and dust removal performance, it is possible to provide a vacuum cleaner excellent in operability and cleaning performance. .

  The vacuum cleaner suction tool and vacuum cleaner of the present invention continuously and smoothly rotate the second rotating brush when the first rotating brush is driven to rotate, so that the running performance and dust removal during forward and backward movement are achieved. The performance can be greatly improved.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
A vacuum cleaner suction tool 15 according to Embodiment 1 of the present invention will be described with reference to FIGS. 1 is an overall perspective view of a vacuum cleaner to which a vacuum cleaner suction tool according to Embodiment 1 of the present invention is connected.

  As shown in FIG. 1, the electric vacuum cleaner of the present invention is provided with an electric blower chamber 3 containing an electric blower 2 in the rear part of the cleaner main body 1, and is sucked into the front part of the cleaner main body 1. A dust collection chamber (not shown) for collecting dust is detachably accommodated, and a dust collection chamber 4 communicating with the suction side opening of the electric blower 2 is disposed. A pair of traveling wheels 5 are attached to the left and right sides of the rear lower part of the vacuum cleaner body 1 so as to be rotatable with respect to a traveling shaft horizontally disposed. The caster 6 is attached so as to be rotatable around a vertical axis and to be rotatable with respect to a traveling shaft arranged horizontally. A connection joint portion 11 provided at one end of the suction hose 10 is detachably connected to the front surface of the vacuum cleaner main body 1 and an air inlet 7 communicating with the dust collecting chamber 4 is provided.

  The other end of the suction hose 10 is provided with a tip joint portion 12 having a handle 14 having an operation portion 14a for an operator to hold during cleaning and to operate the cleaner body 1. . One end of the proximal side of the extension tube 13 which is configured to be extendable or connectable is detachably connected to the distal end joint portion 12 of the suction hose 10, and the other end on the distal end side of the extension tube 13 is connected to the main end of the suction hose 10. The vacuum cleaner suction tool 15 of the first embodiment is detachably connected.

  A bumper 8 made of an elastic material is extended on the surface from the front part of the vacuum cleaner body 1 to both sides. Even if the vacuum cleaner body 1 collides with furniture, pillars, etc. when the vacuum cleaner body 1 travels To avoid scratching. A main body handle 9 provided on the rear upper surface of the vacuum cleaner main body 1 so as to be undulated is gripped when the vacuum cleaner main body 1 is carried.

  Next, the detailed structure of the vacuum cleaner suction tool 15 according to the first embodiment will be described with reference to FIGS. FIG. 2 is an external perspective view of the vacuum cleaner suction tool according to Embodiment 1 of the present invention. FIG. 3 is a perspective view of the vacuum cleaner suction tool viewed from the bottom side. FIG. 5 is a plan view of the vacuum cleaner suction tool as seen from the bottom side, and FIG. 5 is a sectional view of the vacuum cleaner suction tool (as viewed from the left side of the suction tool body). is there. 2 and the subsequent drawings, the direction in which the operator holding the handle 14 pushes forward (advances) the vacuum cleaner suction tool 15 in the traveling direction of the vacuum cleaner suction tool 15 is forward (lower left in FIG. 2). The direction in which the operator pulls back (retracts) the vacuum cleaner suction tool 15 is referred to as the rear (upper right direction in FIG. 2). Further, the right side in the direction in which the vacuum cleaner suction tool 15 is advanced is referred to as the right side (upper left direction in FIG. 2), and the left side is referred to as the left side (lower right direction in FIG. 2).

  As shown in FIG. 2, the main body case 17 of the vacuum cleaner suction tool 15 includes an upper case 17a and a lower case 17b having an opening 18 on the bottom surface. 19 is attached in a tiltable manner, and the distal end of the extension pipe 13 is detachably fitted and fixed to the open end of the connection pipe 19. In addition, a nozzle bumper 20 made of an elastic material such as urethane resin is provided on the outer peripheral surface of the lower case 17b, and functions to alleviate an impact when hitting furniture (not shown).

  Further, as shown in FIG. 3, on the bottom surface of the lower case 17b, a pair of front wheels 21 for traveling near the central left and right ends, and a pair of rear wheels 22 for traveling near the rear left and right ends, respectively, are freely rotatable. Has been attached to. In addition, an undulating safety switch 23 is attached to the rear center of the opening 18 so as to be able to undulate, and the undulating safety switch 23 is in contact with the surface to be cleaned and falls into the attached recess. When a person operates the operation portion 14a, first and second rotary brushes 30 and 35, which will be described later, of the cleaner body 1 are rotated, and the undulating safety switch 23 is separated from the surface to be cleaned from the inside of the recess. In an upright state, the first and second rotating brushes 30 and 35 are configured not to rotate even when the operator operates the operation unit 14a.

  As shown in FIGS. 4 and 5, a rotary brush housing space 18 a as a rotary brush housing space is formed in the front portion of the vacuum cleaner suction tool 15 from the opening 18 toward the upper side of the vacuum cleaner suction tool 15. The rear side of the rotary brush accommodating space 18 a communicates with the connecting pipe 19. The first rotating brush 30 is housed on the front side in the rotating brush housing space 18a, and the second rotating brush 35 is housed on the rear side in parallel with the first rotating brush 30. The vacuum cleaner suction tool 15 is pivotally supported perpendicularly to the advancing / retreating direction. In addition, on the rear side of the rotary brush housing space 18a of the vacuum cleaner suction tool 15, the first rotary brush 30 is placed in the normal rotation direction, that is, in the direction in which the vacuum cleaner suction tool 15 is advanced. An electric motor 24 is housed as a drive source for rotational driving.

  Further, as shown in FIG. 4, a pulley 26 having irregularities formed on the outer peripheral surface is fixed to one end side (left end portion) of the first rotating brush 30, and one end side of the second rotating brush 35 ( A shaft holding member 27a is fixed to the left end). Then, the connecting support member 28 attached so as to rotatably support the rotating shaft (not shown) protruding to the left end side of the pulley 26 is attached to the second rotating brush 35 by the bearing portion 28a on the second rotating brush 35 side. A state in which the fixed shaft core holding member 27a is rotatably supported, and the first rotating brush 30 and the second rotating brush 35 are rotatably held at a predetermined interval by the connecting support member 28. The suction tool main body 16 is fixed at an appropriate position on the left end side of the upper case 17a. In addition, shaft holding members 27b and 27c are fixed to the other end side (right end portion) of the first rotating brush 30 and the other end side (right end portion) of the second rotating brush 35, respectively. The shaft core holding members 27b and 27c are fixed at appropriate positions on the right end side of the upper case 17a of the suction tool main body 16 in a state where the shaft core holding members 27b and 27c are rotatably held with a predetermined interval therebetween.

  The electric motor 24 (shaft 24a) is connected via a belt 25 stretched between a pulley 24b fixed to the shaft 24a of the electric motor 24 and a pulley 26 fixed to the end of the first rotating brush 30. Is transmitted to the first rotating brush 30.

  Next, a detailed configuration of the first and second rotating brushes 30 and 35 in the first embodiment will be described with reference to FIGS. 6 and 7. FIG. 6 is a perspective view of the first and second rotating brushes of the vacuum cleaner suction tool (as viewed from the bottom side when removed from the suction tool body), and FIG. 7 is a first embodiment of the present invention. FIG. 2 is an enlarged cross-sectional view of the first and second rotating brushes of the vacuum cleaner suction tool (when viewed from the left side of the suction tool main body, the downward direction in the figure is the bottom side). In FIG. 6 and subsequent figures, arrows indicate the rotation directions of the first and second rotating brushes 30 and 35.

  In the first embodiment, as shown in FIGS. 3, 4, and 6, the first cleaning piece 31 of the first rotating brush 30 rotates as it approaches the center side in the longitudinal direction (axial direction). The second cleaning piece 36 of the second rotating brush 35 is formed in a substantially V-shape opposite to the first cleaning piece 31. Is formed. Then, as will be described in detail later, the second cleaning piece 36 of the second rotary brush 35 is driven by the rotation of the first rotary brush 30. The cleaning pieces 31 are continuously meshed with each other, and are pressed by the first cleaning pieces 31 from the back side in the rotational direction, so that the first rotating brush 30 is smoothly rotated. Moreover, since the rotation of the second rotating brush 35 is performed using the rotational force of the first rotating brush 30 without using a gear or the like, the second rotation is performed when the surface to be cleaned is a carpet or the like. Even if the brush 35 is difficult to rotate, an excessive load is not applied to the parts such as the bearing part 28a and the connection bearing member 29 of the connection support member 28 that supports the second rotation brush 35. It does not cause a failure.

  Furthermore, in the first embodiment, the substantially V-shape of the first cleaning piece 31 and the second cleaning piece 36 is the intermediate point in the longitudinal direction of the first rotating brush 30 and the second rotating brush 35, respectively. It is comprised so that it may become left-right symmetric on both sides. That is, a substantially V-shaped apex is located at the midpoint between the first rotating brush 30 and the second rotating brush 35. And the 1st cleaning piece 31 and the 2nd cleaning which are displaced to the advance angle side as it shifts to the end part side of the 1st rotary brush 30 and the 2nd rotary brush 35 from the peak of this approximately V shape. When the array line of the pieces 36 is developed on a plane, the array line is substantially linear. By configuring the first cleaning piece 31 and the second cleaning piece 36 in this manner, the load balance in the axial direction (thrust direction) is not lost, and the bearing portion (the bearing portion 28a of the connection support member 28 or the connection bearing) is maintained. The load on the bearing portion of the material 29) can be reduced, and the suction portion 15 and the vacuum cleaner suction tool 15 can be configured with a lighter material. Furthermore, the running performance of the vacuum cleaner suction tool 15 can be improved.

  Here, in the first and second rotating brushes 30 and 35 of the first embodiment, the substantially V-shaped apexes of the first and second cleaning pieces 31 and 36 are respectively shown in FIG. Is set at a position that is retreated about 90 ° with respect to the rotation direction from the position on the circumference where both ends of the circle are arranged.

  The first rotary brush 30 is a cylindrical shaft core member 32 that is long in a direction perpendicular to the advancing and retreating direction of the vacuum cleaner suction tool 15 and is set to have substantially the same length as the left-right width dimension of the opening 18. A plurality of first cleaning pieces 31 (three in the first embodiment) that are set to substantially the same length as the shaft core member 32 and are inserted into the shaft core member 32 are provided.

  As shown in FIG. 7, the shaft core member 32 is provided with a plurality of rib strips 32 a protruding outward from the outer peripheral surface thereof, as shown in FIG. 7, and a pair of two adjacent rib strips 32 a is paired. As described above, the rib portions 32b projecting toward the other are formed on the surfaces facing each other, and the first cleaning piece 31 is inserted between the pair of adjacent rib rib portions 32a and the rib portions 32b. An insertion space 33 is formed.

  The first cleaning piece 31 includes a base end portion 31a and a fibrous portion 31b made of a plurality of fibers raised from the base end portion 31a. And the base end part 31a of this 1st cleaning piece 31 is inserted in the mounting space 33 formed in the axial core material 32, guided and assembled | attached, and the fibrous part 31b of the 1st cleaning piece 31 is the axial center. It protrudes from the ridge portion 32b of the material 32 in the diameter direction. Thus, the 1st cleaning piece 31 is easily assembled | attached to the axial core material 32 of the 1st rotation brush 30 because the base end part 31a is inserted in the installation space 33, and replacement | exchange is required. At this time, it is easily removed from the shaft core member 32 by being extracted from the mounting space 33.

  Of the rib strips 32a forming the pair of shaft core members 32, the rib strips 32b of the rib strips 32a located on the back side with respect to the rotation direction of the first rotating brush 30 are directed outward. A protruding support strip 32c is formed to support the first cleaning piece 31 from the back side. Thereby, when the 1st cleaning piece 31 is rotationally driven, it is supported by the support strip part 32c from the back side, it suppresses that it bends to the back side, and scrapes up the dust on a to-be-cleaned surface effectively. At the same time, the rotational force that advances the vacuum cleaner suction tool 15 can be applied to the surface to be cleaned to improve self-propelled performance.

  Similarly to the first rotating brush 30, the second rotating brush 35 is long in the direction perpendicular to the advancing / retreating direction of the vacuum cleaner suction tool 15, and is approximately the same length as the left-right width dimension of the opening 18. And a plurality of strips (three strips in the first embodiment) inserted into the shaft core member 37, set to substantially the same length as the shaft core member 37. And a second cleaning piece 36.

  As shown in FIG. 7, the shaft core member 37 is provided with a plurality of rib strips 37a projecting in the diametrical direction from the outer peripheral surface thereof, as shown in FIG. 7, and two adjacent rib strips 37a are paired. As described above, the ribs 37b projecting toward the other are formed on the surfaces facing each other, and the second cleaning piece 36 is inserted between the pair of adjacent rib ribs 37a and the ribs 37b. An insertion space 38 is formed.

  The second cleaning piece 36 includes a base end portion 36a and a fibrous portion 36b made of a plurality of fibers raised from the base end portion 36a. And the base end part 36a of this 2nd cleaning piece 36 is inserted in the mounting space 38 formed in the shaft core material 37, guided, and assembled | attached, and the fibrous part 36b of the 2nd cleaning piece 36 is the shaft core. It protrudes from the rib portion 37b of the material 37 in the diameter direction. As described above, the second cleaning piece 36 is easily assembled to the shaft core member 37 of the second rotating brush 35 by inserting the base end portion 36a into the mounting space 38, and needs to be replaced. In some cases, it is easily removed from the shaft core member 37 by being extracted from the mounting space 38.

  In the first embodiment, the fibrous portion 36b constituting the second cleaning piece 36 of the second rotating brush 35 is thinned out along the longitudinal direction of the second rotating brush 35, and a plurality of fiber bundles 36c. As intermittently formed. The plurality of fiber bundles 36c are shifted from each other in the width direction (longitudinal direction of the second rotating brush 35) in the plurality of second cleaning pieces 36, and the raised positions are shifted as a whole. The entire width region of the rotary brush 35 in the longitudinal direction is covered. Thereby, since the 2nd rotary brush 35 can bend flexibly, the load added to the 2nd rotary brush 35 reduces, and thereby the 1st rotary brush 30 which rotationally drives the 2nd rotary brush 35 is used. The applied load is reduced, the first and second rotating brushes 30 and 35 can be efficiently rotated, and the dust on the surface to be cleaned is efficiently removed by the rotation of the first and second rotating brushes 30 and 35. Since it can be scraped up, the dust removal performance can be greatly improved. In addition, the length of the longitudinal direction of the fiber bundle 36c should just cover the full width area of the longitudinal direction of the 2nd rotation brush 35 as a whole, and the several fiber bundle 36c should just form the longitudinal direction as mentioned above. What is necessary is just to set arbitrarily in relation to the arrangement | positioning number to be performed.

  The shaft core member 32 of the first rotating brush 30 is formed with a meshing space 34 between the rib strips 32a opposed to each other on the surfaces where the strips 32b are not formed. Then, the second cleaning piece 36 of the second rotating brush 35 is engaged with the first cleaning piece 31 or the engagement space 34 of the first rotating brush 30, and the first rotating brush 30 is driven to rotate. The second rotating brush 35 is effectively rotated by the first rotating brush 30 by being pressed from the back side in the rotating direction by the first cleaning piece 31.

  In the first embodiment, the length (protrusion allowance) of the portion of the second cleaning piece 36 that protrudes from the rib portion 37 b of the fibrous portion 36 b is the length of the fibrous portion 31 b of the first cleaning piece 31. It is set to be approximately the same as the length of the portion protruding from the ridge portion 32 b, and the fiber thickness of the fibrous portion 36 b in the second cleaning piece 36 is also the same as the fiber thickness of the fibrous portion 31 b in the first cleaning piece 31. It is set almost the same.

  Since the fibrous portion 36b constituting the second cleaning piece 36 is intermittently formed as a plurality of fiber bundles 36c, the number of fibers of the fibrous portion 36b in the second cleaning piece 36 is the first number. The number of fibers of the fibrous portion 31b in the cleaning piece 31 is less, and in the second cleaning piece 36, the waist of the fibrous portion 36b is weaker than that of the first cleaning piece 31 and is easily bent. For this reason, the contact resistance between the second cleaning piece 36 and the surface to be cleaned when rotated is set to be smaller than the contact resistance between the first cleaning piece 31 and the surface to be cleaned. The load applied to the first rotary brush 35 is reduced, thereby reducing the load applied to the first rotary brush 30 that rotationally drives the second rotary brush 35, and the first and second rotary brushes 30 and 35 are efficiently rotated. The dust removal performance can be greatly improved.

  Next, operation | movement and an effect | action of the vacuum cleaner suction tool 15 and the vacuum cleaner (vacuum cleaner main body 1) comprised as mentioned above are demonstrated using FIG.1, FIG.8 and FIG.9. FIG. 8 is a cross-sectional view showing a temporal change in the meshing state of the first and second rotary brushes of the vacuum cleaner suction tool according to Embodiment 1 of the present invention (as viewed from the left side of the suction tool body) FIG. 9 is a cross-sectional view showing the first and second rotating brushes in a perspective view (as viewed from the bottom side) and the meshed state at each position in the axial direction. It is. In FIG. 8, the meshing state when the first and second rotating brushes 30 and 35 are rotated by 30 ° in (a) to (d) is shown over time. FIG. 9A shows a state where the first and second rotary brushes 30 and 35 are engaged at the right end position, and FIG. 9B shows that the longitudinal dimension is shifted from the right end position to the left end side by 1/6. The meshing state at the position, (c) the meshing state at a position that is 1/3 of the longitudinal dimension from the right end position to the left end side, and (d) the meshing state at the intermediate position in the longitudinal direction. Show.

  A power cord (not shown) is pulled out from the vacuum cleaner main body 1, a power plug (not shown) attached to the tip thereof is inserted into a wall outlet, and the operation unit 14 a provided on the handle 14 is operated to operate the electric blower 2 and the vacuum cleaner. When the electric motor 24 built in the vacuum suction tool 15 is energized, the suction force of the electric blower 2 acts on the opening 18 provided in the bottom surface of the lower case 17b of the vacuum cleaner suction tool 15, and covers the floor such as a wooden floor or a carpet. Dust on the cleaning surface is scraped up and sucked by the fibrous portions 31b and 36b of the first and second cleaning pieces 31 and 36, and is carried to the dust collecting chamber 4 through the extension pipe 13 and the suction hose 10. Then, it is collected.

  As described above, in the first and second rotating brushes 30 and 35 of the first embodiment, the substantially V-shaped apexes of the first and second cleaning pieces 31 and 36 are shown in FIG. As shown, it is set at an intermediate position in the longitudinal direction that is retreated about 90 ° with respect to the rotational direction from the position on the circumference where both ends are arranged.

  Then, in a certain part in the longitudinal direction of the first and second rotary brushes 30 and 35, the second rotary brush 35 of the second rotary brush 35 at a certain time (for example, the time zone (a) to (c) in FIG. 8). As the first rotary brush 30 is driven to rotate, the second cleaning piece 36 is continuously engaged with the plurality of first cleaning pieces 31 or the engagement space 34 of the first rotary brush 30, and the first cleaning brush 36. By being pressed from the back side in the rotation direction by the piece 31, the first rotation brush 30 is driven to rotate. Then, after the state where the first rotating brush 30 (first cleaning piece 31) and the second rotating brush 35 (second cleaning piece 36) are engaged, a certain time (for example, in FIG. 8) (Time zone (d)), the first cleaning piece 31 and the second cleaning piece 36 are separated from each other, but soon return to the state of (a) in FIG. The rotating brushes 30 and 35 start to be engaged with each other. As described above, when a portion in the longitudinal direction is taken, the state in which the first rotating brush 30 and the second rotating brush 35 are engaged is maintained in a substantially half time zone during one rotation. Yes.

  In addition, the state in which the first rotary brush 30 and the second rotary brush 35 (first and second cleaning pieces 31, 36) are meshed with each other is the first and second rotary brushes in FIG. 30 and 35 are maintained at any position in the longitudinal direction (for example, positions (d) to (b) in FIG. 9). The state in which the first rotary brush 30 and the second rotary brush 35 are engaged with each other in this way is accompanied by the rotation of the first and second rotary brushes 30 and 35, and the first and second rotary brushes. 30 and 35 are displaced from the outside (left and right end sides) toward the inside (intermediate position side).

  Thus, according to the first rotating brush 30 and the second rotating brush 35 in the first embodiment, the second cleaning piece 36 of the second rotating brush 35 is rotated by the first rotating brush 30. Along with the drive, the first cleaning piece 31 or the engagement space 34 of the first rotating brush 30 is continuously engaged with the first cleaning piece 31 at any position in the longitudinal direction, and the first cleaning piece 31 rotates in the rotational direction. By maintaining the state pressed from the back side, the first rotary brush 30 is continuously and smoothly rotated.

  Therefore, the dust on the surface to be cleaned is blown between the first rotating brush 30 and the second rotating brush 35 by the continuous and smooth rotation of the first and second rotating brushes 30 and 35, Dust can be reliably removed without leaking outside, and this can greatly improve the dust removal performance of the vacuum cleaner suction tool 15. Moreover, the first and second cleaning pieces 31 and 36 of the first and second rotating brushes 30 and 35 are opened in opposite directions, respectively, and receding with respect to the rotational direction as approaching the central side in the longitudinal direction. Therefore, the dust on the surface to be cleaned can be scraped up to the center side where the dust absorption force is stronger and removed more reliably without leaking to the outside.

  Further, according to the first embodiment, the second cleaning piece 36 of the second rotating brush 35 has a low waist and easily bends on the carpet, so that the second cleaning piece 36 and the surface to be cleaned are in contact with each other. Since the resistance is smaller than the contact resistance between the first cleaning piece 31 and the surface to be cleaned, the load applied to the second rotating brush 35 is reduced, and thereby the first rotating brush that rotationally drives the second rotating brush 35. The load applied to 30 is also reduced, and the first and second rotating brushes 30 and 35 are efficiently rotated, and the dust removal performance can be greatly improved.

  In addition, the first rotary brush 30 that is rotationally driven by the electric motor 24 is disposed on the front side, and the second rotary brush 35 is disposed on the rear side, and the first rotary brush 30 is advanced through the suction tool main body 16 during operation. Since the second rotating brush 35 is rotated in the direction opposite to the rotating direction of the first rotating brush 30, the force for moving the vacuum cleaner suction tool 15 in the forward direction is efficiently obtained. And it acts on a to-be-cleaned surface strongly and can operate the vacuum cleaner suction tool 15 lightly even on a carpet.

(Embodiment 2)
A vacuum cleaner suction tool 15 'according to Embodiment 2 of the present invention will be described with reference to FIG. FIG. 10 is a cross-sectional view of the vacuum cleaner suction tool according to Embodiment 2 of the present invention. In addition, about the same part as the said Embodiment 1, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  In the vacuum cleaner suction tool 15 ′ according to the second embodiment, as shown in FIG. 10, a plurality of first cleaning pieces 41 are provided on the first rotating brush 40 from one end side in the longitudinal direction to the other end side. The first cleaning brush 46 is formed in a plurality of second cleaning pieces 46 on the second rotating brush 45, and is formed in a substantially spiral shape that is displaced toward the receding angle side with respect to the rotation direction as approaching to the first rotating brush 40. The second cleaning piece 46 of the second rotating brush 45 is rotated in accordance with the rotation of the first rotating brush 40, and the first rotating brush 40 is formed in a substantially spiral shape opposite to the cleaning piece 41. The plurality of first cleaning pieces 41 are engaged with each other or pressed between them by the first cleaning piece 41 from the back side in the rotation direction, so that the first rotary brush 40 is driven to rotate.

  In addition, in the first and second rotating brushes 40 and 45 of the vacuum cleaner suction tool 15 ′, the first and second cleaning pieces 41 and 46 are each formed in a substantially spiral shape, This is the same as the first and second cleaning pieces 31 and 36 shown in the first embodiment. In other words, the first rotating brush 40 has a shaft core material 42 having a cross-sectional shape similar to that of the shaft core material 32 (however, rib ribs, ribs and the like are formed in a substantially spiral shape with respect to the axis. ), And a base end portion of the first cleaning piece 41 is inserted into an insertion space formed between the rib strip portion and the rib portion, and a plurality of brushed portions from the base end portion A fiber-like portion 41b made of fiber protrudes outward from the ridge portion. Further, the second rotating brush 45 has a shaft core material 47 having a cross-sectional shape similar to that of the shaft core material 37 (however, rib ribs, ribs and the like are formed in a substantially spiral shape with respect to the axis. ), And a base end portion of the second cleaning piece 46 is inserted into an insertion space formed between the rib strip portion and the rib portion, and a plurality of brushed portions from the base end portion A fibrous portion 46b made of fibers is thinned out along the longitudinal direction, is intermittently formed as a plurality of fiber bundles 46c, and protrudes outward from the ridge portion.

  Even in the vacuum cleaner suction tool 15 ′ configured as described above, when the first rotary brush 40 having the first cleaning piece 41 formed in a substantially spiral shape is driven to rotate, the suction tool 15 ′ is also substantially spiral. The second rotary brush 45 having the second cleaning piece 46 formed in a shape (substantially spiral in the direction opposite to the first cleaning piece 41) is the first cleaning piece 41 of the plurality of strips or their The first rotating brush 40 is smoothly driven to rotate in the direction opposite to that of the first rotating brush 40. In addition, the number of fibers in the fibrous portion 46b of the second cleaning piece 46 is less than the number of fibers in the fibrous portion 41b of the first cleaning piece 41 as a whole, and the waist of the second cleaning piece 46 is set to be weak. Therefore, the dust on the surface to be cleaned is moved between the first rotating brush 40 and the second rotating brush 45 by the continuous and smooth rotation of the first and second rotating brushes 40 and 45. The dust can be reliably sucked out without leaking to the outside, and the dust removing performance of the vacuum cleaner suction tool 15 ′ can be greatly improved.

  In addition, the vacuum cleaner main body 1 having the electric blower 2 is connected to the vacuum cleaner suction tools 15 and 15 ′ excellent in dust removal performance, thereby providing an electric vacuum cleaner excellent in operability and cleaning performance. It goes without saying that it can be done.

(Modification in the above embodiment)
Hereinafter, modifications to the vacuum cleaner suction tools 15 and 15 'exemplified in the first and second embodiments will be described.

(About the shape of the cleaning piece)
In the first embodiment, the first cleaning piece 31 of the first rotating brush 30 and the second cleaning piece 36 of the second rotating brush 35 move toward the rotation direction as they approach the center side in the longitudinal direction. The first cleaning piece 31 and the second cleaning piece 36 may be formed in a substantially U shape, and the second rotating brush 35 is formed in a substantially V shape that is displaced toward the receding angle side. As the first cleaning brush 36 is driven to rotate, the plurality of first cleaning pieces 31 in the first rotating brush 30 or continuously between them (engagement space 34). Since it is engaged and rotationally driven, the same effect as described above can be obtained.

  In the first embodiment, the substantially V-shape of the first cleaning piece 31 of the first rotating brush 30 and the second cleaning piece 36 of the second rotating brush 35 is the first rotating brush, respectively. 30 and the second rotating brush 35 are configured so as to be symmetrical with respect to the intermediate point in the longitudinal direction, but the apex may not be located at the intermediate point in the longitudinal direction (somewhat from the intermediate point). It may not be formed symmetrically with respect to the apex. In short, as long as fluctuations in the load balance in the axial direction can be suppressed, any substantially V-shape may be used, and a substantially U-shape or other shapes may be employed.

  Further, the first cleaning piece 31 and the second cleaning are displaced from the substantially V-shaped apex to the advance angle side as they move to the end portions of the first rotating brush 30 and the second rotating brush 35. When the array line of the pieces 36 is developed on a plane, the array line does not necessarily have to be formed in a straight line, and may be formed in a curved line having an inflection point in the middle. As described above, even in a substantially V shape or a substantially U shape slightly deviating from the array shape shown in the first embodiment, variation in the load balance in the axial direction can be suppressed. The first and second rotating brushes 30 and 35 can be efficiently rotated, and the dust removal performance can be improved. However, in order to obtain the best efficiency and performance improvement, it is desirable to use the arrangement shown in the first embodiment.

  Note that one of the first and second cleaning pieces 31 and 36 may be formed in a substantially V shape, and the other may be formed in a substantially U shape. It may be formed in a substantially V shape or a substantially U shape having a slightly different curvature shape or the like, but at least as the first cleaning brush 36 is driven to rotate, the second cleaning piece 36 is It is important that the plurality of first cleaning pieces 31 or the meshing spaces 34 are continuously meshed with each other, and are driven to rotate by that. Both of the first and second cleaning pieces 31 and 36 have such a shape. Need to be set. The same applies to the first and second cleaning pieces 41 and 46 in the second embodiment, which are formed in a substantially spiral shape.

  In the first embodiment, the first cleaning piece 31 of the first rotating brush 30 and the second cleaning piece 36 of the second rotating brush 35 move toward the rotation direction as they approach the center side in the longitudinal direction. It is formed in a substantially V shape that is displaced toward the receding angle side, and in Embodiment 2, it is formed in a substantially spiral shape that is displaced toward the receding angle side with respect to the rotational direction as approaching the other end side from one end side in the longitudinal direction. However, in the first rotating brush 30 and the second rotating brush 35 according to the present invention, the cleaning pieces 31 and 36 move toward the receding angle side and / or with respect to the rotation direction as approaching the center side in the longitudinal direction. What is necessary is just to be formed in the shape which changes continuously to the advance angle side. That is, in addition to the substantially V shape, the substantially U shape, and the substantially spiral shape, the shape may be a substantially W shape or a wavy shape, and the shape can be arbitrarily set. By configuring the first rotating brush 30 and the second rotating brush 35 in this way, the second rotating brush 35 is continuously engaged between the plurality of first cleaning pieces 31, and the back surface When pressed from the side, the first rotating brush 30 is smoothly rotated in the opposite direction. Therefore, the dust on the surface to be cleaned is blown between the first rotating brush 30 and the second rotating brush 35 by the continuous and smooth rotation of the first and second rotating brushes 30 and 35, Dust can be reliably removed without leaking outside, and this can greatly improve the dust removal performance of the vacuum cleaner suction tool 15.

  Further, if the first and second cleaning pieces 31 and 36 are formed symmetrically with respect to the intermediate point in the longitudinal direction of the first and second rotating brushes 30 and 35, the first The load (thrust load) applied to the rotary brush 30 and the second rotary brush 35 in the axial direction is not changed, and the load balance is not changed. Therefore, the vacuum cleaner suction tool 15 travels with the dust removal performance. Performance can also be improved.

  Further, when the first and second cleaning pieces 31 and 36 are formed in a shape that continuously changes to the receding angle side and / or the advancing angle side with respect to the rotation direction as approaching the center side in the longitudinal direction. The maximum displacement amount (displacement angle) toward the receding angle side and / or the advancing angle side may be arbitrarily set together with the number of first and second cleaning pieces 31 and 36. The second cleaning piece 36 of the second rotating brush 35 is continuously engaged between the plurality of first cleaning pieces 31 and pressed from the back side, so that the second rotating brush 35 is If the rotary brush 30 is smoothly rotated in the opposite direction, the maximum amount of displacement (displacement angle) of the first and second cleaning pieces 31 and 36 toward the receding angle side and / or the advancing angle side. May be set in any way.

(About the cross-sectional shape of the shaft core material)
In Embodiments 1 and 2 described above, the shaft core members 32 and 37 of the first rotating brush 30 and the second rotating brush 35 are hollow circular tubes. A tubular thing, a solid section view circular shape or a polygonal rod shape, etc. can be used. Regardless of the tubular shape or the rod shape, grooves similar to the mounting spaces 33 and 38 shown in the first and second embodiments are provided on the surface layer side of the shaft core materials 32 and 37. The first rotary brush 30 and the second rotary brush 35 may be formed by forming along the longitudinal direction and inserting the base end portions 31a and 36a of the cleaning pieces 31 and 36 into the groove portions. . In this case, it is not necessary to form the rib strips 32a and 37a on the shaft core members 32 and 37.

(About the number of strips)
In the first and second embodiments described above, the three first cleaning pieces 31 are inserted into the shaft core material 32 of the first rotary brush 30 and the shaft core material 37 of the second rotary brush 35. The second cleaning pieces 36 are also inserted, but the number of the first cleaning pieces 31 and the second cleaning pieces 36 is not limited to three, but two or four. It may be the above. Depending on the number of strips of the first cleaning piece 31 and the second cleaning piece 36, the rib strips 32a, 37a and the strips of the shaft core members 32, 37 of the first cleaning strip 31 and the second cleaning strip 36 are used. The number and shape of 32b and 37b, or the substantially V-shaped or substantially U-shaped shape of the first cleaning piece 31 and the second cleaning piece 36, that is, the substantially V-shaped or substantially U-shaped shape. The receding angle or the advancing angle (maximum displacement angle) of the vertex is set as appropriate.

(About application of the blade-like part to the first cleaning piece)
In the first and second embodiments described above, the first cleaning piece 31 is configured to include the fibrous portion 31b made of a plurality of fibers raised on the base end portion 31a. Instead of the piece 31, a plate-like blade-like portion extending from the base end portion 31 a, a plate-like blade-like portion extending from the base end portion 31 a, and this blade-like portion It is also possible to use a configuration including a fibrous portion made of a plurality of fibers raised from the fiber. Such a blade-like part is formed of a material having flexibility and shape recovery, and the first cleaning piece having such a blade-like part is simply a first part having a fibrous part 31b. The cleaning piece 31 can be made stronger than the cleaning piece 31 easily, and the self-running property and the dust removing performance of the vacuum cleaner suction tool 15 can be improved.

(About the number of fibers in the fibrous part, thickness, and protrusion margin)
In the first and second embodiments described above, the fibrous portion 36b constituting the second cleaning piece 36 of the second rotating brush 35 is thinned out along the longitudinal direction of the second rotating brush 35, and a plurality of The plurality of fiber bundles 36c are intermittently formed as a fiber bundle 36c, and the raised positions of the second rotary brush 35 are shifted as a whole by shifting the raised positions while overlapping each other in the plurality of second cleaning pieces 36. However, in place of the second cleaning piece 36, the fiber portion 36b of the second cleaning piece 36 is not formed with the fiber bundle 36c, but the fiber bundle 36c is formed. The number of the fibers may be reduced as a whole and less than the number of fibers in the fibrous portion 31b of the first cleaning piece 31. Further, instead of such a second cleaning piece 36, or in addition to the feature of being intermittently formed as a plurality of fiber bundles 36c, the fibers constituting the fibrous portion 36b of the second cleaning piece 36 The thickness may be made thinner than the thickness of the fibers constituting the fibrous portion 31 b of the first cleaning piece 31.

  Further, in the first and second embodiments described above, the protrusion margin of the fibrous portion 36b of the second cleaning piece 36 from the flange-like portion 37b is changed from the flange-like portion 32b of the fibrous portion 31b of the first cleaning piece 31. The protruding margin of the fibrous portion 36b in the second cleaning piece 36 may be set longer than the protruding margin of the fibrous portion 31b in the first cleaning piece 31. Whichever form is adopted, the contact resistance between the second cleaning piece 36 and the surface to be cleaned when driven to rotate is set smaller than the contact resistance between the first cleaning piece 31 and the surface to be cleaned. Thus, the load applied to the second rotating brush 35 is reduced, whereby the load applied to the first rotating brush 30 for rotationally driving the second rotating brush 35 is also reduced, and the first and second rotating brushes 30, 35 are reduced. Can be rotated efficiently, and the dust removal performance can be greatly improved.

(About the arrangement of the first rotating brush)
In the first and second embodiments described above, the first rotating brush 30 that is rotationally driven by the electric motor 24 is disposed on the front side of the rotating brush housing space 18a, and the second rotating brush 35 is disposed behind the rotating brush housing space 18a. However, instead of such an arrangement, the first rotating brush 30 that is rotationally driven by the electric motor 24 is disposed on the rear side of the rotating brush accommodating space 18a, and the second rotating brush 35 is rotated. You may distribute to the front side of the brush accommodating space 18a. When configured in this way, the first rotary brush 30 is driven in reverse rotation during operation, that is, rotated in a direction against the forward movement of the vacuum cleaner suction tools 15 and 15 ′, and the second rotary brush 35 is moved. The first rotating brush 30 is rotated in the direction opposite to the rotating direction. Even in such a case, the first cleaning piece 31 of the first rotating brush 30 is substantially V-shaped or substantially U-displaced toward the receding angle with respect to the rotational direction as approaching the center side in the longitudinal direction. The second cleaning piece 36 of the second rotary brush 35 is formed in a letter shape and is substantially V-shaped or substantially U-shaped opposite to the first cleaning piece 31 of the first rotary brush 30. Shall be formed.

  With the above configuration, when the surface to be cleaned is a carpet, the dust on the carpet is reliably placed between the first rotating brush 30 and the second rotating brush 35 by the first rotating brush 30 that is rotationally driven by the electric motor 24. The second cleaning piece 36 of the second rotating brush 35 is weak at the waist, so that it is easily bent when hitting the carpet surface, and the second rotation. The rotation of the first rotary brush 30 that rotationally drives the brush 35 is not suppressed. When the surface to be cleaned is a wooden floor or the like, since the load received from the surface to be cleaned of the first cleaning piece 31 of the first rotating brush 30 is light, the first rotating brush 30 rotates strongly, Accordingly, the second rotating brush 35 can also be efficiently rotated, and the wiping effect can be exerted without regret while bringing dust on the surface to be cleaned between the second rotating brush 35 and the first rotating brush 30. .

  As described above, the vacuum cleaner suction tool according to the present invention is one in which the first and second rotating brushes rotate efficiently and has excellent dust removal performance. Can be used for vacuum cleaner.

It is a whole perspective view of the vacuum cleaner which connected the suction tool for vacuum cleaners in Embodiment 1 of this invention. It is an external appearance perspective view of the vacuum cleaner suction tool in Embodiment 1 of this invention. It is the perspective view seen from the bottom face side of the suction tool for cleaners in Embodiment 1 of this invention. It is the top view which removed the lower case of the suction tool for vacuum cleaners in Embodiment 1 of this invention, and was seen from the bottom face side. It is sectional drawing of the suction tool for cleaners in Embodiment 1 of this invention. It is a perspective view (state removed from the suction tool main body) of the 1st and 2nd rotating brush of the suction tool for vacuum cleaners in Embodiment 1 of this invention. It is an expanded sectional view of the 1st and 2nd rotating brush of the suction tool for cleaners in Embodiment 1 of this invention. It is sectional drawing which shows the time change of the meshing state of the 1st and 2nd rotary brush of the suction tool for cleaners in Embodiment 1 of this invention. It is sectional drawing which shows the meshing state in each position of the perspective view of the 1st and 2nd rotating brush of the suction tool for cleaners in Embodiment 1 of this invention, and an axial direction. It is the perspective view seen from the bottom face side of the suction tool for cleaners in Embodiment 2 of this invention. It is sectional drawing which shows embodiment with the suction tool for conventional vacuum cleaners. It is sectional drawing which shows other embodiment of the suction tool for conventional vacuum cleaners.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vacuum cleaner main body 15 Vacuum cleaner suction tool 16 Suction tool main body 17 Main body case 18 Opening part 18a Rotating brush accommodation space 24 Electric motor (drive source)
30 1st rotary brush 31 1st cleaning piece 31a Base end part 31b Fibrous part 32 Shaft core material 32a Rib strip part 32b Rib part 32c Support strip part 35 Second rotary brush 36 Second cleaning piece 36a Base End portion 36b Fibrous portion 36c Fiber bundle 37 Shaft core material 37a Rib strip portion 37b Strip portion

Claims (15)

A suction opening body is formed on the bottom surface, and the suction tool main body is moved back and forth on the surface to be cleaned.
A first rotating brush rotatably supported in the opening, the shaft core being pivotally supported perpendicularly to the advancing and retreating direction of the suction tool body, and having a plurality of first cleaning pieces along the longitudinal direction of the peripheral surface;
A drive source for rotationally driving the first rotary brush;
A second rotating brush that is rotatably supported in the opening and is supported in parallel with the first rotating brush and has a plurality of second cleaning pieces in the longitudinal direction of the peripheral surface;
The second cleaning piece of the second rotating brush is continuously engaged with or between the plurality of first cleaning pieces of the first rotating brush as the first rotating brush is driven to rotate. The second cleaning brush is smoothly driven to rotate by the first rotating brush by being pressed from the back side in the rotational direction by the first cleaning piece. Suction tool. The first cleaning piece of the first rotating brush is formed in a shape that continuously changes from the receding angle side and / or the advancing angle side with respect to the rotation direction as approaching the center side in the longitudinal direction,
The second cleaning piece of the second rotating brush has a shape opposite to that of the first cleaning piece of the first rotating brush, and the receding angle side and / or the rotation direction as it approaches the central side in the longitudinal direction. It is formed into a shape that continuously changes to the advance angle side,
The second cleaning piece of the second rotating brush is continuously engaged with or between the plurality of first cleaning pieces of the first rotating brush as the first rotating brush is driven to rotate. The second rotating brush is smoothly driven to rotate by the first rotating brush by being pressed from the back side in the rotation direction by the first cleaning piece. Vacuum cleaner suction tool as described in 1.   In the first cleaning piece of the first rotating brush and the second cleaning piece of the second rotating brush, the shape that continuously changes to the receding angle side and / or the advancing angle side with respect to the rotation direction, The vacuum cleaner suction tool according to claim 2, wherein the suction tool is left-right symmetrical with respect to an intermediate point in the longitudinal direction of the first rotating brush and the second rotating brush. The first cleaning piece of the first rotating brush is formed in a substantially V shape or a substantially U shape that is displaced toward the receding angle side with respect to the rotation direction as approaching the center side in the longitudinal direction,
The second cleaning piece of the second rotating brush is formed in a substantially V shape or a substantially U shape, which is opposite to the first cleaning piece of the first rotating brush,
The second cleaning piece of the second rotating brush is continuously engaged with or between the plurality of first cleaning pieces of the first rotating brush as the first rotating brush is driven to rotate. The second rotating brush is smoothly driven to rotate by the first rotating brush by being pressed from the back side in the rotation direction by the first cleaning piece. The suction tool for vacuum cleaners of any one of -3. The first cleaning piece of the first rotating brush is formed in a substantially spiral shape that is displaced toward the receding angle side with respect to the rotation direction as approaching the other end side from one end side in the longitudinal direction,
The second cleaning piece of the second rotating brush is formed in a substantially spiral shape opposite to the first cleaning piece of the first rotating brush,
The second cleaning piece of the second rotating brush is continuously engaged with or between the plurality of first cleaning pieces of the first rotating brush as the first rotating brush is driven to rotate. The second rotating brush is smoothly driven to rotate by the first rotating brush by being pressed from the back side in the rotation direction by the first cleaning piece. Or the suction tool for vacuum cleaners of 2.   The first rotating brush includes a tubular or rod-shaped shaft core member, a plurality of rib strips protruding outward from the outer peripheral surface of the shaft core member, and a pair of two adjacent rib strips. As described above, a rib portion projecting toward the other side is formed on the surfaces facing each other, and a base end portion of the first cleaning piece is formed between a pair of adjacent rib rib portions and a hook-shaped portion. The vacuum cleaner suction tool according to any one of claims 1 to 5, wherein said vacuum cleaner suction tool is inserted into said space.   Out of the rib strips forming the pair of the first rotating brushes, the rib strips of the rib strip located on the back side with respect to the rotation direction protrude outward and the first cleaning piece is back The vacuum cleaner suction tool according to claim 6, wherein a support strip is formed to be supported from the side.   The second rotating brush includes a tubular or rod-shaped shaft core member, a plurality of rib strips protruding outward from the outer peripheral surface of the shaft core member, and a pair of two adjacent rib strips. As described above, a rib portion protruding toward the other side is formed on the surfaces facing each other, and a base end portion of the second cleaning piece is formed between a pair of adjacent rib rib portions and a hook-shaped portion. The vacuum cleaner suction tool according to any one of claims 1 to 7, wherein the vacuum cleaner suction tool is inserted into the formed space.   The second cleaning piece of the second rotating brush is adjacent to the plurality of fibrous portions of the first rotating brush, or the ribs adjacent to each other where the rib portions are not formed. The vacuum cleaner suction tool according to any one of claims 6 to 8, which is meshed between the strips.   The contact resistance between the second cleaning piece and the surface to be cleaned when driven to rotate is set smaller than the contact resistance between the first cleaning piece and the surface to be cleaned. The vacuum cleaner suction tool as described in the item.   The first cleaning piece of the first rotating brush and the second cleaning piece of the second rotating brush are each configured to include a fibrous portion composed of a plurality of fibers raised from a base end portion. Item 11. A vacuum cleaner suction tool according to any one of Items 1 to 10.   The first cleaning piece of the first rotating brush is configured to include a blade-like portion extending from the base end portion, and the second cleaning piece of the second rotating brush is set to the base end portion. The vacuum cleaner suction tool according to any one of claims 1 to 10, comprising a fibrous portion made of a plurality of fibers raised from the fiber.   The fibrous part which comprises the 2nd cleaning piece of a said 2nd rotating brush is thinned out along the longitudinal direction of a 2nd rotating brush, and is formed intermittently as a some fiber bundle. 12. A vacuum cleaner suction tool according to 12.   The plurality of fiber bundles raised intermittently on the fibrous portion of the second cleaning piece of the second rotating brush are shifted from each other while overlapping each other in the plurality of second cleaning pieces. The vacuum cleaner suction tool according to claim 13, which covers the entire width region of the second rotating brush in the longitudinal direction.   The electric vacuum cleaner provided with the electric blower and the suction tool for vacuum cleaners of any one of Claims 1-14.

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