JP2008220519A - Suction tool for vacuum cleaner and vacuum cleaner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To allow a first and a second rotary brushes held by a support member to be simply removed as a unit and to allow easy maintenance. <P>SOLUTION: A suction tool for a vacuum cleaner is provided with: a first rotary brush 30 which is equipped with a pulley 26 on one end and has a first cleaning piece 31 along a longitudinal direction; a motor 24 for rotary-driving the first rotary brush 30; a drive belt 25 for communicating driving force from the motor 24 to the pulley 26; a second rotary brush 35 which has a second cleaning piece 36 in the longitudinal direction and is rotary-driven by the first rotary brush 30; and a pair of support members 28 and 29 for freely rotatably pivoting the first and second rotary brushes 30 and 35. The second rotary brush 35 is placed between the motor 24 and the first rotary brush 30, and the first and second rotary brushes 30 and 35 which are joined and held by the pair of support members 28 and 29 are removably fixed inside the case 17. <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 60 disclosed in Patent Document 1, as shown in FIG. 15, a plurality of rotating brushes 61 and 62 having different rotational directions and rotational speeds are parallel to the surface to be cleaned. The blades 61b and 62b of the rotating brushes 61 and 62 are twisted and attached to the rotating rods 61a and 62a. 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. The gears 63 and 70 are covered with a gear case 71.
Japanese Patent Laid-Open No. 5-111449

  However, in the configuration of the vacuum cleaner suction tool 60 described in Patent Document 1, the first and second rotating brushes 61 and 62 are rotated in opposite directions via the gears 63 and 70, respectively. Although continuous rotation can be obtained, there is a problem that the gears 63 and 70 are easily worn because they are driven to rotate through the gears 63 and 70. Further, since 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, an axial load is applied to the gears 63 and 70 and the bearing 69, and the object is cleaned. Since the axial load changes due to the change of the surface, the structure is likely to cause a mechanical failure.

  When the gears 63 and 70 need maintenance due to wear or the like, the case is disassembled, the belt 65 is removed from the pulley 64, and the bearing 69 and the gear together with the first and second rotating brushes 61 and 62 are removed. The gears 63 and 70 covered with the cover 71 are taken out of the case as a unit, but the gears 63 and 70 are incorporated with the gear cover 71 covered, and a pulley 64 is attached to the outer side. Therefore, there is a problem that it takes time to check and replace the gears 63 and 70.

  The present invention solves the above-described conventional problems, and the first and second rotations held by the support member even when maintenance of the rotating brush or the like in the suction tool body is required. It is an object of the present invention to provide a vacuum cleaner suction tool that can be easily removed as a unit and that can be easily maintained, and a vacuum cleaner including the same.

In order to solve the conventional problem, a vacuum cleaner suction tool according to claim 1 of the present invention includes a rotary passive portion at one end and a first cleaning piece along the longitudinal direction of the circumferential surface. 1 rotating brush,
A drive source for rotationally driving the first rotary brush, a drive belt for transmitting a drive force from the drive source to the rotary passive portion of the first rotary brush, and a parallel arrangement with the first rotary brush A second rotating brush having a second cleaning piece in the longitudinal direction of the peripheral surface and driven to rotate by the first rotating brush, and both ends of the first rotating brush and the second rotating brush. And a pair of support members that rotatably support the first rotating brush and the second rotating brush at a predetermined interval, and the second rotating brush comprises: The first rotary brush and the second rotary brush, which are arranged between the drive unit and the first rotary brush and are connected and held by the pair of support members, are a vacuum cleaner suction case. It is characterized by being detachably fixed inside .

  According to the vacuum cleaner suction tool according to claim 1, since the first rotary brush and the second rotary brush are rotatably supported by the support member and connected and held, the vacuum cleaner suction The first rotating brush and the second rotating brush connected and held by the support member are removed by disassembling the case of the tool and removing the driving belt connecting the driving source and the first rotating brush from the rotation passive portion. It can be easily removed as a unit. Thereby, the first rotating brush and the second rotating brush can be easily maintained, and after the maintenance, the first rotating brush and the second rotating brush can be easily attached to the vacuum cleaner suction tool. Can do.

  In addition, the driving force is reliably transmitted from the driving source via the driving belt to the first rotating brush located on the opposite side of the driving source across the second rotating brush. By being driven to rotate by the first rotating brush, when the first rotating brush is driven to rotate in the direction in which the vacuum cleaner suction tool is moved forward, the self-running force in the moving forward direction acts on the running performance. It is excellent, and the dust on the surface to be cleaned can be efficiently scraped between the first rotating brush and the second rotating brush, so that a vacuum cleaner suction tool having excellent dust removal performance can be obtained.

  The vacuum cleaner suction tool according to claim 2 of the present invention is the vacuum cleaner suction tool according to claim 1, wherein, of the pair of support members, the support member on the side where the drive belt is disposed. Has an extending portion that extends inward through the rotation track of the drive belt, and a bearing portion that rotatably supports the second rotating brush at the extending portion. And the outer diameter of the bearing part of the said 2nd rotating brush in the said extension part is set smaller than the outer diameter of the said rotation passive part, It is characterized by the above-mentioned.

  According to the vacuum cleaner suction tool of the second aspect, the drive belt is arranged by making the outer diameter of the bearing portion pivotally supporting the second rotary brush smaller than the outer diameter of the rotary passive portion in the extending portion. The second rotating brush can be rotatably supported by a bearing portion having a small outer diameter in a narrow space. For this reason, it is not necessary to attach another member such as a pulley to the end of the second rotating brush on the side where the drive belt is arranged, and the size of the support member on the side where the drive belt is arranged can be reduced. it can. Further, since the support member and the bearing portion set to a small size can be easily handled in a narrow space during maintenance, the drive belt spanned over the rotation passive portion of the first rotary brush and the support The first rotating brush and the second rotating brush held by the member can be easily removed.

  The vacuum cleaner suction tool according to claim 3 of the present invention is the vacuum cleaner suction tool according to claim 1, wherein, of the pair of support members, the support member on the side where the drive belt is disposed. Has an extending portion that extends inward through the rotation track of the drive belt, and a bearing portion that rotatably supports the second rotating brush at the extending portion. The extending portion is cut out at a portion located below the shaft core member that holds the second cleaning piece in the second rotating brush, and the shaft center of the drive source is the first rotating brush. It is arrange | positioned in the upper position with respect to the axial center of this rotating brush.

  According to the vacuum cleaner suction tool of the third aspect, the shaft center of the drive source can be positioned above the shaft center of the first rotating brush by notching the lower portion of the extending portion. As a drive source that is dimensionally regulated by the bottom surface of the vacuum cleaner suction case, a larger motor, that is, an electric motor having a larger electric capacity and higher suction power can be used. The running performance and dust removal performance of the tool can be improved. Further, at the time of maintenance, the support member attached to the case of the vacuum cleaner suction tool and the first rotating brush and the second rotation held by the support member through the notched portion of the extending portion The brush can be easily removed.

  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 rotary brush and the second rotary brush are provided. , Shaft core holding members are attached to both ends, and the shaft core holding member disposed on the side of the second rotating brush on which the driving belt is disposed is driven in the longitudinal direction of the second rotating brush. It is arrange | positioned inside a belt, It is characterized by the above-mentioned.

  According to the vacuum cleaner suction tool according to claim 4, the first rotating brush and the second rotating brush are arranged by arranging the shaft holding member of the second rotating brush while avoiding the rotation orbit of the driving belt. In addition to being able to drive the drive without interfering with the drive belt, the support member mounted on the case of the suction belt for the drive belt and the drive belt laid over the rotary passive part of the first rotary brush during maintenance , And the first rotating brush and the second rotating brush held by the support member can be easily removed.

  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 Claims 1-4.

  According to the electric vacuum cleaner of the present invention, the first and second rotary brushes held by the support member can be integrated as a single unit even when maintenance of the rotary brush or the like in the vacuum cleaner suction tool becomes necessary. And can be easily maintained.

  The vacuum cleaner suction tool and the vacuum cleaner according to the present invention have the first and second rotary brushes held by the support member even when maintenance of the rotary brush or the like in the vacuum cleaner suction tool becomes necessary. It can be easily removed as a unit and can be easily maintained.

  BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a best mode for carrying out a vacuum cleaner suction tool according to the present invention will be described with reference to the drawings. It should be understood that the embodiments disclosed below are illustrative in all respects and are not restrictive. The technical scope of the present invention is shown not by the content disclosed in the embodiment but by the description of the scope of claims, and further includes all modifications within the meaning and scope equivalent to the scope of claims. Should be understood.

(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 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.

  Next, the detailed configuration of the first and second rotating brushes 30 and 35 and the pair of support members (the connection support member 28 and the connection bearing member 29) according to the first embodiment will be described with reference to the above-described drawings. This will be described with reference to FIGS. FIG. 6 is a perspective view (removed from the suction tool body) of the first and second rotating brushes held by the pair of support members of the vacuum cleaner suction tool according to Embodiment 1 of the present invention. FIG. 7 shows a structure around the shaft holding member of the support member and the first and second rotating brushes. FIG. 7A is a plan view (a state where no shaft holding member is attached) and FIG. ) Is a plan sectional view (in a state where an axial core holding member is mounted). FIG. 8 is a perspective view of a support member arranged on the drive belt side, and FIG. 9 is a cross-sectional view showing the positional relationship between the drive source, the first and second rotating brushes, and the support member. 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. 4 and 5, the second rotating brush 35 is disposed between the electric motor 24 and the first rotating brush 30, and the first rotating brush 30. A pulley 26 (rotation passive portion) having an outer peripheral surface formed on the outer peripheral surface is attached to one end side (left end portion) of the second rotation brush 35, and a shaft core is held on one end side (left end portion) of the second rotation brush 35. A material 27A is attached.

  Then, the connection support member 28 (the support member on the drive belt side) rotatably supports the rotating boss 26a (see FIG. 7) protruding to the left end side of the pulley 26 at the front bearing portion 28a disposed on the front side. In addition, it has an extended portion 28b (see FIG. 8) that extends toward the inward side through the rotation track of the drive belt 25 on the rear side of the front bearing portion 28a. The provided rear bearing portion 28c supports the shaft holding member 27A (rotating boss 27a) mounted on the second rotating brush 35 in a rotatable manner. The connection support member 28 is detachably fixed at a proper position on the left inner surface of the upper case 17a of the suction tool body 16.

  Further, shaft holding members 27B and 27C are attached 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 bearing member 29 (support member) rotatably supports the shaft core holding member 27B attached to the first rotating brush 30 in the front bearing portion 29a disposed on the front side thereof, and is disposed on the rear side thereof. The rear bearing portion 29b is configured to rotatably support the shaft core holding member 27C attached to the second rotating brush 35. The coupling bearing member 29 is detachably fixed at a proper position on the right inner surface of the upper case 17a of the suction tool body 16.

  Each of the shaft core holding portions 27A to 27C has the same structure. Here, the structure of the shaft core holding portion 27A attached to the left end portion of the shaft core material 37 of the second rotating brush 35 will be described as an example. To do. As shown in FIGS. 7A and 7B, the shaft core holding portion 27A includes a shaft core material receiving portion 27b attached to the shaft core material 37 of the second rotating brush 35, and a shaft core material receiving portion 27b. The bearing bush 27c mounted in the outer opening space of the outer periphery, the rotating boss 27a fitted in the middle shaft space of the shaft core material receiving portion 27b, and the washer 27d interposed between the bearing bush 27c and the rear bearing portion 28c. And is composed of.

  Then, the rear bearing portion 28c of the coupling support member 28 is slidably fitted between the inner peripheral surface of the outer opening space of the shaft core receiving portion 27b and the outer peripheral surface of the bearing bush 27c. A shaft core material receiving portion is formed by inserting a flange portion formed so as to protrude in the circumferential direction at the tip portion over a fitting insertion hole provided in the center portion of the outer side end surface of the rear bearing portion 28c. 27b is rotatably supported by the rear bearing portion 28c. Further, in the shaft core material receiving portion 27b, the shaft core material 37 is fitted into the inner opening, the rear bearing portion 28c of the coupling support member 28 is fitted into the outer opening, and the bearing bush 27c is formed on the inner surface of the tip opening. As a result, the outer edge contacts and seals to prevent the dust from entering the sliding portion of the rear bearing portion 28 c and the shaft core members 32 and 36.

  The shaft core holding portions 27B and 27C have the same structure as the shaft core holding portion 27A, except that the end portion of the shaft core material to be mounted and the bearing portion to be pivotally supported are different.

  The pulley 26 basically has the same structure as the shaft core holding portion 27A, and the shaft 26 is provided with an uneven power transmission groove on the outer peripheral surface of the shaft core material receiving portion 26b. Only the core holder 27A is different. When the drive belt 25 is bridged on the outer peripheral surface of the shaft core material receiving portion 26b in a state where the pulley 26 is rotatably held by the front bearing portion 28a via the rotary boss 26a, the drive belt 25 is The movement in the left-right direction is restricted between the flange portion 26 c provided on the inner side of the guide member 28 and the guide surface 28 d of the front bearing portion 28 a of the coupling support member 28, and the rotational drive from the electric motor 24 via the pulley 26. The force is transmitted to the first rotating brush 30 through the pulley 24b, the driving belt 25, and the pulley 26 fixed to the shaft 24a of the electric motor 24.

  In this way, the first rotating brush 30 and the second rotating brush 35 are rotatably connected and held at a predetermined interval by the connecting support member 28 and the connecting bearing member 29. As a result, the lower case 17b of the suction tool body 16 is disassembled, and the drive belt 25 that connects the electric motor 24 and the first rotating brush 30 is removed from the pulley 26, thereby being connected and held by the connection support member 28. The first rotating brush 30 and the second rotating brush 35 can be easily removed as a unit. The connection support member 28 and the connection bearing member 29 are detachably attached to the shaft core members 32 and 36 of the first rotary brush 30 and the second rotary brush 35, respectively. Thereby, the connection support material 28 and the connection bearing material 29 are removed from the first rotary brush 30 and the second rotary brush 35, and the first rotary brush 30 and the second rotary brush 35 can be easily maintained. In addition, after the maintenance, the first rotary brush 30 and the second rotary brush 35 can be easily attached to the suction tool body 16.

  Moreover, the rotational driving force is reliably transmitted from the electric motor 24 via the driving belt 25 to the first rotating brush 30 located on the opposite side of the electric motor 24 with the second rotating brush 35 interposed therebetween, and further, When the first rotary brush 30 is driven to rotate in the direction in which the vacuum cleaner suction tool 15 is moved forward by the rotary brush 35 being rotated by the first rotary brush 30, the self-running force in the forward direction As a result of the action, the cleaning performance is excellent, and the dust on the surface to be cleaned is efficiently scraped between the first rotating brush 30 and the second rotating brush 35, and the dust removing performance is excellent. The suction tool 15 can be used.

  In the first embodiment, the connection support member 28 is set such that the outer diameter of the rear bearing portion 28 c of the second rotating brush 35 in the extending portion 28 b is smaller than the outer diameter of the pulley 26. Thereby, in the narrow space where the drive belt 25 is arranged, the second rotating brush 35 can be rotatably supported by the rear bearing portion 28c having a small outer diameter. For this reason, it is not necessary to attach another member such as a pulley to the left end portion of the second rotating brush 35 on the side where the drive belt 25 is disposed, and the connection support material on the side where the drive belt 25 is disposed 28 can be reduced in size. During maintenance, the connection support member 28 and the rear bearing portion 28c set to a small size can be easily handled even in a narrow space, and therefore, the drive laid over the pulley 26 of the first rotating brush 30. The first rotary brush 30 and the second rotary brush 35 held on the belt 25 and the connecting support member 28 can be easily removed.

  A pulley 26 and shaft core holding members 27A to 27C are attached to the left and right ends of the first rotating brush 30 and the second rotating brush 35, respectively, and arranged on the side where the driving belt 25 of the second rotating brush 35 is disposed. The axial core holding member 27 </ b> A is disposed inside the drive belt 25 in the longitudinal direction of the second rotating brush 35. The shaft holding member 27A of the second rotary brush 35 is disposed so as to avoid the rotation trajectory of the drive belt 25, so that the rotation drive of the first rotary brush 30 and the second rotary brush 35 interferes with the drive belt 25. In the maintenance, the drive belt 25 laid over the pulley 26 of the first rotating brush 30, the connection support member 28 mounted on the lower case 17b of the suction tool body 16, and the connection support The first rotating brush 30 and the second rotating brush 35 held on the material 28 can be easily removed.

  Next, the detailed structure of the first and second rotary brushes 30 and 35 in the first embodiment will be described with reference to FIG. It is sectional drawing which shows the structure of a 2nd rotating brush.

  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, the parts such as the connecting support member 28 and the connecting bearing member 29 that support the second rotating brush 35 (the front and rear bearing portions 28a and 28b and the front and rear bearing portions of the connecting bearing member 29). No excessive load is applied to 29a, 29b), and no mechanical failure is caused in these parts.

  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 connection support material 28 and the connection bearing material 29 (front and rear bearings). It is possible to reduce the load on the front and rear bearing portions 29a, 29b) of the portions 28a, 28b and the connecting bearing material 29, to prevent mechanical failure, and to support the connection with a lighter material. The material 28, the connecting bearing material 29, and thus the vacuum cleaner suction tool 15 can be configured. 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. 10, the shaft core member 32 is provided with a plurality of pairs of rib strips 32a projecting outward from the outer peripheral surface thereof, as shown in FIG. A rib portion 32b protruding toward the other side is formed on the opposite surface. As a result, a groove portion 32c having a narrow opening is formed between the pair of rib portions 32a and the flange portion 32b, and the first cleaning piece 31 is inserted into the groove portion 32c. 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.

  Further, out of the rib strips 32a forming a pair of shaft core members 32, on the upper surface of the rib strip 32b of the rib strip 32a located on the back side with respect to the rotation direction of the first rotating brush 30, outward A support strip 32d that protrudes toward the front is formed to support the first cleaning piece 31 from the back side. Further, a convex portion 32e protruding toward the first cleaning piece 31 is continuously provided along the longitudinal direction of the first rotating brush 30 on the surface of the support strip 32d facing the first cleaning piece 31 or It is formed intermittently. As a result, when the first cleaning piece 31 is driven to rotate, it is supported from the back side by the support strip 32d and further restrained by the convex part 32e, and is prevented from being bent to the back side or the side. It is possible to effectively scrape dust on the surface to be cleaned and to improve the self-propelled performance by causing the rotational force to advance the vacuum cleaner suction tool 15 to act on the surface to be cleaned.

  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. The rod-shaped shaft core material 37 set to the above and the number of the plurality of strips (three strips in the first embodiment) which are set to substantially the same length as the shaft core material 37 and are inserted into the shaft core material 37. 2 cleaning pieces 36.

  As shown in FIG. 10, the shaft core member 37 is provided with a plurality of pairs of holding strips 37a projecting in the diametrical direction from the outer peripheral surface thereof, as shown in FIG. Opposing proximal end portions are notched to form a groove portion 37b having a narrow opening portion, and an insertion space 38 into which the second cleaning piece 36 is inserted is formed in the groove portion 37b. Yes.

  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 groove part 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 addition, the fibrous part 36b which comprises the 2nd cleaning piece 36 of the 2nd rotary brush 35 is thinned out along the longitudinal direction of the 2nd rotary brush 35, and is intermittently formed as a some fiber bundle. It may be. The plurality of fiber bundles 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. What is necessary is just to comprise so that the full width area of the longitudinal direction of the rotating brush 35 may be 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. The length of the fiber bundle in the longitudinal direction is not limited as long as the plurality of fiber bundles as a whole cover the entire width of the second rotating brush 35 in the longitudinal direction, and is formed in the longitudinal direction. What is necessary is just to set arbitrarily in relation to the number of arrangement | positioning.

  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, the operation and action of the vacuum cleaner suction tool 15 and the electric vacuum cleaner (the vacuum cleaner body 1) configured as described above will be described with reference to FIGS. . FIG. 11 is a cross-sectional view showing a temporal change in the meshing state of the first and second rotating brushes of the vacuum cleaner suction tool according to Embodiment 1 of the present invention (the state seen from the left side of the suction tool body) FIG. 12 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. 11, (a) to (d) show the meshing state when the first and second rotating brushes 30 and 35 are rotated by 30 ° over time. 12A shows the meshing state at the right end position of the first and second rotating brushes 30 and 35, and FIG. 12B 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 portion in the longitudinal direction of the first and second rotating brushes 30 and 35, the second rotating brush 35 of the second rotating brush 35 at a certain time (for example, the time zone (a) to (c) in FIG. 11). 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 with each other, a certain time (for example, in FIG. 11) (D) (time zone), 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 and 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. 12). 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 FIGS. 13 and 14. FIG. 13 is a perspective view of a support member arranged on the drive belt side of the vacuum cleaner suction tool according to Embodiment 2 of the present invention, and FIG. 14 shows a vacuum cleaner suction tool configured using the support member. It is sectional drawing. 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. 13, the connection support member 39 rotates the first rotating brush 30 in the same manner as the connection support member 28 in the first embodiment. A front bearing portion 39a that freely supports the shaft, an extending portion 39b that extends inward through the rotation track of the drive belt 25, and the second rotating brush 35 can freely rotate at the extending portion 39b. And a rear bearing portion 39c that is pivotally supported on the shaft. In the second embodiment, the extension portion 39b is cut out at a portion located below the shaft core member 37 of the second rotating brush 35, and the shaft center of the electric motor 24 is rotated in the first rotation. It is arranged at a position above the axis of the brush 30.

  Thus, by cutting out the lower part of the extending portion 39b, as shown in FIG. 14, compared with the case of the first embodiment, the electric motor with respect to the axial center of the first rotating brush 30 is used. As the electric motor 24 that can be positioned at a higher position and is dimensionally regulated by the bottom surface of the lower case 17b of the suction tool main body 16, the electric motor 24 is larger in size, that is, has a larger electric capacity and more attractive force. A high-priced one can be used, and the running performance and dust removal performance of the vacuum cleaner suction tool 15 'can be enhanced. Further, during maintenance, the connection support member 39 attached to the lower case 17b of the suction tool body 16 and the first rotation held by the connection support member 39 through the notched portion of the extension portion 39b. The brush 30 and the second rotating brush 35 can be easily removed.

  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.

  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 the perspective view (state removed from the suction tool main body) seen from the bottom face side of the 1st and 2nd rotary brush hold | maintained by one pair of supporting members of the suction tool for cleaners in Embodiment 1 of this invention. . (A) Top view (the shaft core holding material is not mounted) showing the structure around the shaft holding material of the vacuum cleaner suction tool and the first and second rotating brushes in Embodiment 1 of the present invention (State) and (b) plane sectional view (state where the shaft core holding material is mounted). It is a perspective view of the support member arrange | positioned at the drive belt side of the suction tool for cleaners in Embodiment 1 of this invention. It is sectional drawing which shows the positional relationship of the drive source of the suction tool for cleaners in Embodiment 1 of this invention, a 1st and 2nd rotating brush, and a supporting member. It is sectional drawing which shows the structure of the 1st rotating brush and 2nd rotating brush of the vacuum cleaner suction tool in Embodiment 1 of this invention. It is sectional drawing which shows the time change of the engagement 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 an axial position with the perspective view of the 1st and 2nd rotating brush of the suction tool for cleaners in Embodiment 1 of this invention. It is a perspective view of the supporting member arrange | positioned at the drive belt side of the suction tool for cleaners in Embodiment 2 of this invention. It is sectional drawing which shows the positional relationship of the drive source of the suction tool for cleaners in Embodiment 2 of this invention, a 1st and 2nd rotating brush, and a supporting member. It is sectional drawing which shows embodiment with 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)
25 Drive belt 26 Pulley (rotation passive part, shaft core holding material)
27A-27C Axle core holding material 28 Connection support material (support member on the drive belt side)
28b Extension part 28c Rear bearing part (bearing part)
29 Connecting bearing (other support member)
30 1st rotary brush 31 1st cleaning piece 31a Base end part 31b Fibrous part 32 Shaft core material 32a Rib strip part 32b Strip part 32c Groove part 32d Support strip part 35 Second rotary brush 36 Second Cleaning piece 36a Base end part 36b Fibrous part 37 Shaft core material 37a Holding strip part 37b Groove part

Claims (5)

A first rotating brush having a rotary passive portion at one end and having a first cleaning piece along the longitudinal direction of the peripheral surface;
A drive source for rotationally driving the first rotary brush;
A driving belt for transmitting a driving force from the driving source to the rotational passive portion of the first rotating brush;
A second rotating brush that is arranged in parallel with the first rotating brush, has a second cleaning piece in the longitudinal direction of the peripheral surface, and is driven to rotate by the first rotating brush;
A pair of support members disposed at both ends of the first rotating brush and the second rotating brush and rotatably supporting the first rotating brush and the second rotating brush at a predetermined interval. And comprising
The second rotating brush is disposed between the driving unit and the first rotating brush, and the first rotating brush and the second rotating brush are connected and held by the pair of support members. A vacuum cleaner suction tool, wherein the vacuum cleaner suction tool is detachably fixed in a case of the vacuum cleaner suction tool. Of the pair of support members, the support member on the side where the drive belt is disposed extends through the rotation path of the drive belt toward the inward side, and the extension A bearing portion that rotatably supports the second rotating brush at the exit portion;
2. The vacuum cleaner suction tool according to claim 1, wherein an outer diameter of a bearing portion of the second rotating brush in the extending portion is set to be smaller than an outer diameter of the rotation passive portion. Of the pair of support members, the support member on the side where the drive belt is disposed extends through the rotation path of the drive belt toward the inward side, and the extension A bearing portion that rotatably supports the second rotating brush at the exit portion;
The extension portion is cut out at a portion located below the shaft core material that holds the second cleaning piece in the second rotating brush, and the axis of the drive source is used for the first rotation. The vacuum cleaner suction tool according to claim 1, wherein the vacuum cleaner suction tool is disposed at a position above the brush axis. A shaft core holding material is attached to each end of each of the first rotating brush and the second rotating brush,
The shaft holding member disposed on the side on which the drive belt is disposed of the second rotating brush is disposed on the inner side of the driving belt in the longitudinal direction of the second rotating brush. The vacuum cleaner suction tool according to any one of claims 1 to 3.   The electric vacuum cleaner provided with the electric blower and the suction tool for vacuum cleaners of any one of Claims 1-4.

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