JP2011041762A

JP2011041762A - Suction body and vacuum cleaner

Info

Publication number: JP2011041762A
Application number: JP2009193565A
Authority: JP
Inventors: Kenji Harada; 健司原田; Atsushi Morishita; 篤至森下; Fumiki Mano; 文樹真野; Hiromitsu Ichikawa; 洋光市川; Mitsuru Watanabe; 満渡邉
Original assignee: Toshiba Corp; Toshiba Consumer Electronics Holdings Corp; Toshiba Home Appliances Corp
Current assignee: Toshiba Corp; Toshiba Lifestyle Products and Services Corp
Priority date: 2009-08-24
Filing date: 2009-08-24
Publication date: 2011-03-03
Anticipated expiration: 2029-08-24
Also published as: JP5537090B2; CN201855224U

Abstract

<P>PROBLEM TO BE SOLVED: To provide a floor brush which controls the generation of noise due to the contact with a floor surface during the run while securing the shock-absorbing property with the floor surface and the traveling performance. <P>SOLUTION: The outer periphery side of the outside section in a shaft direction of a running wheel section body 85 is covered by a covering section 86 formed by a member more flexible than the running wheel section body 85. A brushing-up section 87 with the end side projecting towards the outer periphery side than the covering section 86 and a smaller friction against the floor surface than the covering section 86 is positioned on the outer periphery side of the running wheel section body 85. The shock-absorbing property with the floor surface F can be secured and the noise in placing a floor brush 20 on the floor surface F can be controlled because the flexible covering section 86 (an outer covering section 97) of running wheels 23 which are positioned on both sides of a case body 21 abuts against the floor surface F even if the case body rotates relatively around a connecting tube when placing the floor brush 20 on the floor surface F. The traveling performance can be secured and the generation of noise during the run can be controlled because a brush 87a of the brushing-up section 87 comes into contact with the floor surface when running. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、吸込口体の両側部に位置する回転体部を有する吸込口体およびこれを備えた電気掃除機に関する。 The present invention relates to a suction port body having a rotating body portion located on both sides of the suction port body and a vacuum cleaner provided with the suction port body.

従来、いわゆるキャニスタ型の電気掃除機は、電動送風機を収容した掃除機本体と、この掃除機本体に基端側が接続される管部とを備えている。この管部は、ホース体、延長管および吸込口体としての床ブラシを有している。この床ブラシは、横長のケース体と、このケース体の左右幅方向の中心域の後部に周方向および上下方向に回動可能に連通接続されているとともに延長管の先端に接続可能な接続管とを備えている。ケース体の被掃除面である床面に対向する下面には、横長の吸込口が開口形成されている。また、ケース体の両側部には、敷居や絨毯などの段差の乗り越えを円滑にして床面での走行性を向上するために、回転体ユニットである大径の走行輪がそれぞれ回転自在に取り付けられている。これら走行輪は、比較的硬質の走行輪本体の外周部に、可撓性を有する軟質の回転体部である車輪部が取り付けられて構成されている。そして、作業者は、ホース体の先端部に形成された把持部を把持し、延長管を介して床ブラシを床面上で前後に走行させて掃除をする(例えば、特許文献１参照。)。 2. Description of the Related Art Conventionally, so-called canister-type vacuum cleaners include a vacuum cleaner main body that houses an electric blower, and a pipe portion that is connected to the vacuum cleaner main body at the base end side. The pipe portion has a hose body, an extension pipe, and a floor brush as a suction port body. The floor brush has a horizontally long case body and a connecting pipe that is connected to the rear portion of the central area of the case body in the left-right width direction so as to be rotatable in the circumferential direction and the vertical direction and that can be connected to the tip of the extension pipe. And. A horizontally long suction port is formed as an opening on the lower surface of the case body that faces the floor surface to be cleaned. Also, on both sides of the case body, large-diameter running wheels, which are rotating body units, are rotatably attached to smooth the climbing of steps such as sills and carpets and improve the running performance on the floor surface. It has been. These traveling wheels are configured such that a wheel portion, which is a soft rotating body portion having flexibility, is attached to an outer peripheral portion of a relatively hard traveling wheel main body. The operator grips the grip portion formed at the tip of the hose body and cleans the floor brush by running back and forth on the floor surface via the extension pipe (see, for example, Patent Document 1). .

特開平１１−１７８７５８号公報(第４頁、図１)Japanese Patent Laid-Open No. 11-178758 (page 4, FIG. 1)

作業者が床ブラシを床面上に載置しようとする際、接続管がケース体に対して周方向に回動可能であるため、通常、ケース体の両側のいずれか一方が他方に対して相対的に下側となる。したがって、この床ブラシを床面に載置するときには、ケース体の両側のいずれか一方が他方よりも先に床面に当接することとなる。このとき、上述の床ブラシでは、ケース体に取り付けられたいずれかの走行輪の車輪部が床面に当接することで、衝撃を低減することが可能となる。 When an operator tries to place the floor brush on the floor surface, the connecting pipe can be rotated in the circumferential direction with respect to the case body. Relatively lower. Therefore, when this floor brush is placed on the floor surface, either one of both sides of the case body comes into contact with the floor surface before the other. At this time, in the floor brush described above, the impact of the traveling wheel attached to the case body comes into contact with the floor surface so that the impact can be reduced.

しかしながら、上述の床ブラシでは、車輪部が軟質であるため、床面とのグリップ力が相対的に大きくなり、走行性が低下するだけでなく、例えばフローリングなどの床面を走行する際に車輪部の下側が順次床面に貼り付き、この貼り付いた部分が床面から順次剥がれることで、連続的に騒音が発生するという問題点を有している。 However, in the above-mentioned floor brush, since the wheel portion is soft, the grip force with the floor surface becomes relatively large, and not only the traveling performance is lowered, but also the wheel when traveling on the floor surface such as flooring, for example. There is a problem that noise is continuously generated because the lower side of the part is sequentially stuck to the floor surface, and the adhered part is sequentially peeled off from the floor surface.

一方で、走行性を向上するために車輪部を硬質にすると、床面に載置した際の干渉性が充分でなくなるおそれがある。 On the other hand, if the wheel portion is made rigid in order to improve traveling performance, the coherence when placed on the floor may not be sufficient.

本発明は、このような点に鑑みなされたもので、被掃除面との緩衝性および走行性を確保しつつ、騒音の発生を抑制した吸込口体およびこれを備えた電気掃除機を提供することを目的とする。 This invention is made in view of such a point, and provides the suction opening body which suppressed generation | occurrence | production of noise, and a vacuum cleaner provided with this, ensuring the buffering property and running property with a to-be-cleaned surface. For the purpose.

本発明は、幅方向に長手状のケース体の両側に回転可能に配置された回転体部が、ケース体の幅方向に沿って軸方向を有する円環状の回転体部本体と、この回転体部本体よりも軟質の部材により形成されこの回転体部本体の少なくとも軸方向外側部の外周側を覆う被覆部と、回転体部本体の外周側に位置し、先端側が被覆部よりも外周側に突出し被覆部よりも被掃除面に対する摩擦が小さい摩擦低減部とを備えているものである。 The present invention relates to an annular rotating body main body in which a rotating body portion rotatably disposed on both sides of a case body that is longitudinal in the width direction has an axial direction along the width direction of the case body, and the rotating body Formed of a member softer than the main body of the rotating body, covering the outer peripheral side of at least the axially outer side of the rotating body main body, and positioned on the outer peripheral side of the main body of the rotating body, with the distal end being on the outer peripheral side of the covering And a friction reducing portion having a smaller friction with respect to the surface to be cleaned than the protruding covering portion.

本発明によれば、回転体部本体よりも軟質の部材により形成した被覆部で回転体部本体の少なくとも軸方向外側部の外周側を覆うとともに、回転体部本体の外周側に、先端側が被覆部よりも外周側に突出しこの被覆部よりも被掃除面に対する摩擦が小さい摩擦低減部を配置することで、被掃除面に載置する際に接続管を中心として相対的にケース体が回動しても、このケース体の両側に位置する回転体部の被覆部が被掃除面に当接するので、被掃除面との緩衝性を確保でき、被掃除面に載置する際の騒音を抑制できるとともに、走行時には、摩擦低減部が被掃除面に接触するので、走行性を確保しつつ、この走行時の騒音の発生を抑制できる。 According to the present invention, at least the outer peripheral side of the outer side in the axial direction of the rotating body main body is covered with the covering portion formed of a softer member than the rotating body main body, and the front end side covers the outer peripheral side of the rotating body main body. The case body rotates relative to the connection pipe when it is placed on the surface to be cleaned by placing a friction reduction part that protrudes to the outer peripheral side of the part and has less friction against the surface to be cleaned than the covering part. Even so, the cover of the rotating body located on both sides of the case body comes into contact with the surface to be cleaned, so that buffering with the surface to be cleaned can be secured, and noise when placed on the surface to be cleaned is suppressed. In addition, since the friction reducing portion contacts the surface to be cleaned during traveling, generation of noise during traveling can be suppressed while ensuring traveling properties.

本発明の第１の実施の形態の吸込口体の回転体ユニットを示し、(a)は図５のＡ−Ａに相当する位置での断面図、(b)は図５のＢ−Ｂに相当する位置での断面図である。The rotary body unit of the suction inlet body of the 1st Embodiment of this invention is shown, (a) is sectional drawing in the position corresponded to AA of FIG. 5, (b) is BB of FIG. It is sectional drawing in the position corresponding. 同上回転体ユニットの組み立て前の状態を示す分解平面図である。It is a disassembled plan view which shows the state before an assembly of a rotary body unit same as the above. 同上回転体ユニットの軸部を回転体部に挿入して回転させた状態を示す平面図である。It is a top view which shows the state which inserted and rotated the axial part of the rotary body unit same as the above. 同上軸部と回転体部との間に付勢手段を取り付けた状態を示す平面図である。It is a top view which shows the state which attached the biasing means between the shaft part same as the above, and a rotary body part. 同上回転体ユニットを示す斜視図である。It is a perspective view which shows a rotary body unit same as the above. 同上吸込口体の障害物近傍での動作を(a)ないし(c)の順に示す側面図である。It is a side view which shows operation | movement in the vicinity of an obstruction of a suction inlet same as the above in order of (a) thru | or (c). 同上吸込口体の走行面に接地する際の動作を示す正面図である。It is a front view which shows the operation | movement at the time of earthing | grounding to the running surface of a suction inlet body same as the above. 同上吸込口体の走行面に接地する際の動作を示す側面図である。It is a side view which shows the operation | movement at the time of earthing | grounding to the running surface of a suction inlet body same as the above. 同上吸込口体を示す平面図である。It is a top view which shows a suction inlet same as the above. 同上吸込口体を備えた電気掃除機を示す斜視図である。It is a perspective view which shows the vacuum cleaner provided with the suction inlet same as the above. 本発明の第２の実施の形態の回転体ユニットを示す側面図である。It is a side view which shows the rotary body unit of the 2nd Embodiment of this invention.

以下、本発明の第１の実施の形態の構成を図１ないし図１０を参照して説明する。 Hereinafter, the configuration of the first embodiment of the present invention will be described with reference to FIGS.

図１０において、11は電気掃除機を示し、この電気掃除機11は、掃除機本体12の内部に収容された電動送風機13の駆動にて生じる吸気風とともに吸い込んだ塵埃を、図示しない集塵部に捕集するものである。 In FIG. 10, reference numeral 11 denotes an electric vacuum cleaner. The electric vacuum cleaner 11 is configured to collect dust sucked together with the intake air generated by driving the electric blower 13 accommodated in the main body 12 of the vacuum cleaner. To collect.

また、掃除機本体12には、電動送風機13の動作を制御する本体制御手段としての図示しない本体制御回路が収容されているとともに、外部から空気を吸引する本体吸込口14が前部に開口されている。この本体吸込口14には、可撓性を有し湾曲可能な細長略円筒状のホース体15が連通接続されている。このホース体15の先端には、電動送風機13の動作モードなどが選択可能な手元操作部16が設けられている。この手元操作部16には、掃除する際に作業者が把持する把持部17が基端側に向けて突設され、この把持部17には、本体制御回路に所定の信号を送信して掃除機本体12内の電動送風機13などを複数の動作モードに設定する複数の設定ボタン18が設けられている。 The vacuum cleaner main body 12 houses a main body control circuit (not shown) as a main body control means for controlling the operation of the electric blower 13, and a main body suction port 14 for sucking air from the outside is opened at the front. ing. The main body suction port 14 is connected to a flexible and bendable elongated substantially cylindrical hose body 15 in communication. At the tip of the hose body 15, a hand operation unit 16 that can select an operation mode of the electric blower 13 is provided. The hand operating unit 16 is provided with a gripping portion 17 that is gripped by an operator when cleaning, and projects a predetermined signal to the main body control circuit to clean the gripping portion 17. A plurality of setting buttons 18 for setting the electric blower 13 and the like in the machine main body 12 to a plurality of operation modes are provided.

さらに、手元操作部16の先端には、伸縮可能な細長略円筒状の延長管19が着脱可能に連通接続されている。すなわち、延長管19は、ホース体15を介して電動送風機13の吸込側に連通接続されている。また、この延長管19の先端には、例えば室内の被掃除面としての走行面である床面Ｆ(図７)の絨毯などの上に載置させて、この絨毯上の塵埃を吸い込む吸込口体としての床ブラシ20が着脱可能に連通接続されている。したがって、床ブラシ20は、延長管19、ホース体15および本体吸込口14を介して、電動送風機13の吸込側に連通接続される。なお、電動送風機13および本体制御回路などは、それぞれ商用交流電源、あるいは二次電池などから給電されるように構成されている。 Further, an elongated, substantially cylindrical extension tube 19 that can be extended and retracted is detachably connected to the tip of the hand operation unit 16. That is, the extension pipe 19 is connected to the suction side of the electric blower 13 through the hose body 15. In addition, at the tip of the extension pipe 19, for example, a suction port that is placed on a carpet or the like of a floor surface F (FIG. 7) that is a running surface as a room to be cleaned and sucks dust on the carpet. A floor brush 20 as a body is detachably connected. Therefore, the floor brush 20 is connected to the suction side of the electric blower 13 through the extension pipe 19, the hose body 15, and the main body suction port. The electric blower 13, the main body control circuit, and the like are each configured to be supplied with power from a commercial AC power source or a secondary battery.

そして、床ブラシ20は、図８ないし図１０に示すように、吸込口体本体としてのケース体21と、このケース体21の後部に回動可能に接続された接続管22と、ケース体21の両側部に配置された回転体ユニットとしての走行輪23と、ケース体21の前部に配置された前カバー25とを備えている。 As shown in FIGS. 8 to 10, the floor brush 20 includes a case body 21 as a suction port body, a connecting pipe 22 rotatably connected to a rear portion of the case body 21, and a case body 21. Traveling wheels 23 as rotating body units disposed on both sides of the front body and a front cover 25 disposed on the front portion of the case body 21.

ケース体21は、上側が開放された下ケース26と、この下ケース26上に取り付けられた図示しない中ケースと、下ケース26および中ケースの上部の後側を覆い、下ケース26および中ケースとの間で接続管22を回転可能に挟持する上ケース28と、この上ケース28の前側に取り付けられた前ケース29と、下ケース26と上ケース28および前ケース29との間に挟持される緩衝部材であるバンパ30とを有しており、左右幅方向に長手状、すなわち横長に形成されている。さらに、このケース体21には、図示しない駆動手段としての電動部である駆動源、すなわちモータと、このモータにより回転される回転清掃体としての回転ブラシ32とが取り付けられている。 The case body 21 covers a lower case 26 whose upper side is opened, a middle case (not shown) attached on the lower case 26, and the rear side of the upper part of the lower case 26 and the middle case. Between the upper case 28, the upper case 28 attached to the front side of the upper case 28, the lower case 26, the upper case 28, and the front case 29. The bumper 30 is a buffer member and is formed in a longitudinal shape in the left-right width direction, that is, in a horizontally long shape. Further, the case body 21 is provided with a drive source that is an electric part as a drive means (not shown), that is, a motor, and a rotating brush 32 as a rotary cleaning body rotated by the motor.

下ケース26には、前端部に、回転ブラシ32が嵌合する横長四角形状の吸込口35が切り欠き形成されている。 In the lower case 26, a horizontally-long rectangular suction port 35 into which the rotary brush 32 is fitted is cut out at the front end.

中ケースは、下ケース26の後部に配置され、下ケース26上に一体的に固定されている。 The middle case is disposed at the rear portion of the lower case 26 and is integrally fixed on the lower case 26.

また、前ケース29には、前端部に、横長四角形状の前側吸込口36が切り欠き形成されている。この前側吸込口36は、吸込口35に連続して形成され前カバー25が嵌合するものである。 Further, the front case 29 is formed with a front-side suction port 36 having a horizontally long rectangular shape at the front end portion. The front suction port 36 is formed continuously with the suction port 35 and is fitted with the front cover 25.

また、バンパ30は、例えばエラストマ、あるいはゴムなどの弾性部材により形成されており、ケース体21の両側から後部に亘って連続的に配置されている。 The bumper 30 is formed of an elastic member such as an elastomer or rubber, and is continuously arranged from both sides of the case body 21 to the rear part.

また、モータは、正転および逆転が可能であり、図示しない制御回路によってその駆動が制御されている。 Further, the motor can rotate forward and backward, and its drive is controlled by a control circuit (not shown).

また、回転ブラシ32は、取付部材としての略円柱状の回転ブラシ組立37の周囲に、複数の清掃部材38(図８)が取り付けられている。 The rotating brush 32 has a plurality of cleaning members 38 (FIG. 8) attached around a substantially cylindrical rotating brush assembly 37 as an attaching member.

回転ブラシ組立37は、例えば金属、あるいは合成樹脂などにより形成されている。また、清掃部材38は、例えば拭取部材であるブレード、掻取部材であるブラシ毛、あるいはこれらの組み合わせなどであり、基端側が回転ブラシ組立37の溝部にそれぞれ保持されることにより、回転ブラシ組立37の外周面に取り付けられて径方向に先端側が突出している。 The rotating brush assembly 37 is made of, for example, metal or synthetic resin. Further, the cleaning member 38 is, for example, a blade as a wiping member, brush hair as a scraping member, or a combination thereof, and the base end side is held in the groove portion of the rotating brush assembly 37, so that the rotating brush Attached to the outer peripheral surface of the assembly 37, the tip end side protrudes in the radial direction.

接続管22は、吸込口35と連通しており、ケース体21から後方へと突出した端部が延長管19の先端側へと着脱可能に連通接続される。また、この接続管22は、ケース体21の後部寄りの位置に、上下方向へと回動可能に接続されている。 The connecting pipe 22 communicates with the suction port 35, and an end protruding rearward from the case body 21 is detachably connected to the distal end side of the extension pipe 19. Further, the connection pipe 22 is connected to a position near the rear part of the case body 21 so as to be rotatable in the vertical direction.

そして、各走行輪23は、図１ないし図５に示すように、略円筒状の回転体ユニット回動軸としての軸部51と、床面Ｆと接触する回転体部としての走行輪部52と、これら軸部51と走行輪部52との間に介在された複数、例えば４つの付勢手段としてのコイルばね53と、軸部51をケース体21に対して抜け止めするための抜止体54と、ケース体21側と反対側、すなわち外側部を覆う透明なカバー55とを備えている。なお、各走行輪23は、床ブラシ20の左右幅方向に互いに対称となっているため、一方の走行輪23についてのみ説明し、他方の走行輪23についての説明を省略する。 As shown in FIGS. 1 to 5, each traveling wheel 23 includes a shaft portion 51 as a substantially cylindrical rotating body unit rotating shaft and a traveling wheel portion 52 as a rotating body portion in contact with the floor surface F. A plurality of, for example, four coil springs 53, which are interposed between the shaft 51 and the traveling wheel 52, and a retaining member for retaining the shaft 51 from the case body 21. 54 and a transparent cover 55 that covers the side opposite to the case body 21 side, that is, the outer side portion. Since each traveling wheel 23 is symmetrical with each other in the left-right width direction of the floor brush 20, only one traveling wheel 23 will be described, and description of the other traveling wheel 23 will be omitted.

軸部51は、ケース体21の側部に形成された軸受部61に対して回転可能に軸支するための部分であり、例えば合成樹脂などにより形成されている。そして、この軸部51は、円筒状の軸部本体63と、この軸部本体63の一端側に円筒部64を介して連続する規制部65と、軸部本体63の他端側の外周全体からフランジ状に突出してケース体21の側部に沿うフランジ部66とを一体に備えている。 The shaft portion 51 is a portion for rotatably supporting a bearing portion 61 formed on the side portion of the case body 21, and is formed of, for example, a synthetic resin. The shaft portion 51 includes a cylindrical shaft portion main body 63, a restriction portion 65 continuing to the one end side of the shaft portion main body 63 via the cylindrical portion 64, and the entire outer periphery on the other end side of the shaft portion main body 63. A flange portion 66 that protrudes in a flange shape and extends along the side portion of the case body 21 is integrally provided.

ここで、軸受部61は、略円筒状の軸受部本体68と、この軸受部本体68の中心側に同軸状に形成されたねじボス部69とを一体に備えており、ケース体21から水平方向に沿って側方に突出している。また、軸受部61は、図８に示すように、回転ブラシ32と略同軸で、かつ、接続管22の回動軸よりも前方の位置に形成されている。この結果、走行輪23は、中心位置が接続管22の回動軸の中心位置よりも前側に位置している。 Here, the bearing portion 61 is integrally provided with a substantially cylindrical bearing portion main body 68 and a screw boss portion 69 formed coaxially on the center side of the bearing portion main body 68. Projects sideways along the direction. Further, as shown in FIG. 8, the bearing portion 61 is substantially coaxial with the rotating brush 32 and is formed at a position ahead of the rotating shaft of the connecting pipe 22. As a result, the traveling wheel 23 has a center position positioned on the front side of the center position of the rotation shaft of the connecting pipe 22.

また、図１ないし図５に示すように、軸部本体63は、軸受部本体68に内周側が嵌合して回転可能に軸支されており、外周に各コイルばね53の係止用の係止突出部71が形成され、先端側に、中心軸側へと延びる軸部本体面部としての先端面部72が形成され、この先端面部72の中心位置にねじボス部69が挿通される挿通孔73が形成され、かつ、この挿通孔73の内縁部に中心軸側へ延びる抜止面部74が形成されている。 Further, as shown in FIGS. 1 to 5, the shaft portion main body 63 is rotatably supported by fitting the inner peripheral side to the bearing portion main body 68, and is used for locking the coil springs 53 on the outer periphery. A locking projection 71 is formed, and a distal end surface portion 72 as a shaft portion main body surface portion extending toward the central axis is formed on the distal end side, and an insertion hole through which the screw boss portion 69 is inserted at the center position of the distal end surface portion 72 73 is formed, and a retaining surface portion 74 extending toward the central axis is formed at the inner edge of the insertion hole 73.

係止突出部71は、先端面部72と前側が略面一な半円柱状に形成されており、周方向に略等間隔に離間されて配置されている。また、各係止突出部71の基端部の周囲には、コイルばね53の一端部を保持するための溝状の凹部76が形成されている。 The locking protrusions 71 are formed in a semi-cylindrical shape with the front end surface 72 and the front side being substantially flush with each other, and are disposed at substantially equal intervals in the circumferential direction. In addition, a groove-like recess 76 for holding one end of the coil spring 53 is formed around the base end of each locking projection 71.

円筒部64は、軸部本体63の先端面部72の挿通孔73の周囲に一体に基端部が形成されており、この挿通孔73と同軸となっている。また、この円筒部64は、軸部本体63よりも径寸法が小さい。 The cylindrical portion 64 has a proximal end portion integrally formed around the insertion hole 73 of the distal end surface portion 72 of the shaft portion main body 63, and is coaxial with the insertion hole 73. The cylindrical portion 64 has a smaller diameter than the shaft portion main body 63.

さらに、規制部65は、円筒部64の先端の外周面全体から径方向へとフランジ状に突出した円環状の規制部本体81と、この規制部本体81から突出した複数の軸部規制部82とを一体に備えている。したがって、この規制部65と軸部本体63の先端面部72の前面との間の円筒部64の外周側には、円環状の嵌合部83が溝状に形成されている。 Further, the restricting portion 65 includes an annular restricting portion main body 81 protruding in a flange shape from the entire outer peripheral surface of the tip of the cylindrical portion 64 in a radial direction, and a plurality of shaft portion restricting portions 82 protruding from the restricting portion main body 81. And integrated. Therefore, an annular fitting portion 83 is formed in a groove shape on the outer peripheral side of the cylindrical portion 64 between the restricting portion 65 and the front surface of the distal end surface portion 72 of the shaft portion main body 63.

軸部規制部82は、例えばコイルばね53に対応する複数形成されており、周方向に互いに略等間隔に離間されている。 A plurality of shaft restricting portions 82 are formed corresponding to the coil springs 53, for example, and are spaced apart from each other at substantially equal intervals in the circumferential direction.

フランジ部66は、走行輪23のケース体21側を覆っている。 The flange portion 66 covers the case body 21 side of the traveling wheel 23.

また、走行輪部52は、各コイルばね53によって、軸部51に対して、この軸部51の軸方向に交差(直交)する方向、本実施の形態では前後上下に可動的に支持されているとともに、軸部51に対して周方向に回動しないように略固定されている。そして、この走行輪部52は、円環状(円筒状)の回転体部本体としての走行輪部本体85と、この走行輪部本体85と一体的に成形された被覆部86と、これら走行輪部本体85と被覆部86とに亘って取り付けられた摩擦低減部としての接地部である起毛部87とを備えており、走行輪部本体85と被覆部86とが、例えばダブルモールド(二色成形)により一体的に成形性されている。なお、走行輪部52をケース体21の両側に配置するとは、走行輪52をケース体21の両側近傍に配置した構成も含むものとする。 In addition, the traveling wheel portion 52 is movably supported by each coil spring 53 in a direction intersecting (orthogonal) with the axial direction of the shaft portion 51 with respect to the shaft portion 51, in this embodiment. And substantially fixed so as not to rotate in the circumferential direction with respect to the shaft portion 51. The traveling wheel portion 52 includes a traveling wheel portion main body 85 as an annular (cylindrical) rotating body portion main body, a covering portion 86 formed integrally with the traveling wheel portion main body 85, and the traveling wheels. The main body 85 and the covering portion 86 are provided with a raised portion 87 that is a ground contact portion as a friction reducing portion, and the running wheel portion main body 85 and the covering portion 86 are, for example, a double mold (two colors). It is formable integrally by molding. The arrangement of the traveling wheel portions 52 on both sides of the case body 21 includes a configuration in which the traveling wheels 52 are disposed in the vicinity of both sides of the case body 21.

走行輪部本体85は、例えばダブルモールドの一次側となるもので、例えばＡＢＳなどの比較的硬質の部材(合成樹脂)により、軸部51よりも径大に形成され、ケース体21の左右幅方向に沿って軸方向を有している。また、この走行輪部本体85は、図１(ｂ)に示すように、外周面85aの外側、すなわち軸方向の一端側であるケース体21から遠い側寄りの位置に、被覆部86と嵌合する外側嵌合部としての外側凹部85bが段差状に形成されており、外周面85aの内側、すなわち軸方向の他端側であるケース体21に近い側寄りの位置に、被覆部86と嵌合する内側嵌合部としての内側凹部85cが段差状に形成されている。さらに、この走行輪部本体85には、内周縁部から中心軸方向へと、例えばコイルばね53に対応する複数の回転体規制部としての走行輪部規制部89が突出して一体に形成されている。 The traveling wheel portion main body 85 is, for example, the primary side of a double mold, and is formed with a diameter larger than the shaft portion 51 by a relatively hard member (synthetic resin) such as ABS. It has an axial direction along the direction. Further, as shown in FIG. 1 (b), the traveling wheel portion main body 85 is fitted with the covering portion 86 at a position on the outer side of the outer peripheral surface 85a, that is, on the side far from the case body 21 that is one end side in the axial direction. The outer concave portion 85b as an outer fitting portion to be joined is formed in a stepped shape, and inside the outer peripheral surface 85a, that is, at a position close to the side close to the case body 21, which is the other end side in the axial direction, An inner recess 85c as an inner fitting portion to be fitted is formed in a step shape. Further, in this traveling wheel part main body 85, a traveling wheel part restricting part 89 as a plurality of rotating body restricting parts corresponding to, for example, the coil spring 53 protrudes and is integrally formed from the inner peripheral edge part to the central axis direction. Yes.

外側凹部85bと内側凹部85cとは、それぞれ走行輪部本体85の周方向全体に亘って連続して形成されている。また、これら外側凹部85bと内側凹部85cとは、周方向の所定位置、例えば走行輪部規制部89，89間の各位置で、図１(a)および図５に示す連通部85dを介して互いに連通している。 The outer recess 85b and the inner recess 85c are each formed continuously over the entire circumferential direction of the traveling wheel body 85. The outer recess 85b and the inner recess 85c are located at predetermined positions in the circumferential direction, for example, at positions between the traveling wheel portion restricting portions 89 and 89, via the communicating portion 85d shown in FIGS. Communicate with each other.

図１ないし図５に示す走行輪部規制部89は、軸部51の嵌合部83にそれぞれ嵌合することで各軸部規制部82と摺接して軸部51と走行輪部52との軸方向の位置を互いに規制する部分であり、走行輪部本体85の外側の内縁部にそれぞれ形成されている。また、これら走行輪部規制部89は、走行輪部本体85の中心軸方向に向けて徐々に幅寸法が小さくなる略台形状に形成されており、周方向に略等間隔に離間されて配置されている。したがって、これら走行輪部規制部89の間には、コイルばね53がそれぞれ取り付けられる孔部91(図２)が周方向に略等間隔に形成されている。さらに、これら走行輪部規制部89の基端部には、カバー55を取り付けるための取付孔92が走行輪部本体85の内縁部に沿って円弧状に形成されている。そして、これら走行輪部規制部89の先端部間には、軸部51の規制部65の規制部本体81が挿通可能で軸部本体63が挿通不可能な挿通孔部93が形成されている。また、走行輪部規制部89の少なくともいずれかには、走行輪部本体85を成形する際の図示しないゲートが外側面89aに形成されている。 The traveling wheel part restricting portion 89 shown in FIGS. 1 to 5 is slidably brought into contact with each shaft part restricting part 82 by being fitted to the fitting part 83 of the shaft part 51, so that the shaft part 51 and the traveling wheel part 52 are in contact with each other. It is a part that regulates the position in the axial direction to each other, and is formed at the inner edge part on the outer side of the traveling wheel part body 85, respectively. Further, these traveling wheel portion restricting portions 89 are formed in a substantially trapezoidal shape whose width dimension gradually decreases toward the central axis direction of the traveling wheel portion main body 85, and are disposed at substantially equal intervals in the circumferential direction. Has been. Therefore, between the traveling wheel portion restricting portions 89, hole portions 91 (FIG. 2) to which the coil springs 53 are respectively attached are formed at substantially equal intervals in the circumferential direction. Further, an attachment hole 92 for attaching the cover 55 is formed in an arc shape along the inner edge of the traveling wheel portion main body 85 at the base end portion of the traveling wheel portion restricting portion 89. Further, between the front end portions of the traveling wheel portion restricting portions 89, an insertion hole portion 93 through which the restricting portion main body 81 of the restricting portion 65 of the shaft portion 51 can be inserted and the shaft portion main body 63 cannot be inserted is formed. . Further, at least one of the traveling wheel portion restricting portions 89 is formed with a gate (not shown) on the outer surface 89a when the traveling wheel portion main body 85 is formed.

各孔部91は、軸部51の各軸部規制部82よりも幅寸法が大きく形成されている。また、各孔部91には、コイルばね53の他端側を保持するための壁部である保持部95が走行輪部本体85の内縁部から中心軸方向へと突出して、外側へと開口するコ字状に形成されている。 Each hole portion 91 is formed to have a larger width dimension than each shaft portion regulating portion 82 of the shaft portion 51. Also, in each hole 91, a holding portion 95, which is a wall portion for holding the other end side of the coil spring 53, protrudes from the inner edge portion of the traveling wheel portion body 85 in the central axis direction and opens outward. It is formed in a U shape.

また、被覆部86は、例えばダブルモールドの二次側となるもので、例えばエラストマなどの走行輪部本体85よりも軟質の部材(合成樹脂)により成形されている。さらに、被覆部86は、走行輪部本体85の軸方向外側部の外周側を覆う円環状の外側被覆部97と、走行輪部本体85の軸方向内側部の外周側を覆う円環状の内側被覆部98とを備えており、これら外側被覆部97と内側被覆部98とが、互いに略平行に離間されて、これら被覆部97，98間に起毛部87を取り付ける取付凹部99が形成されている。また、被覆部97，98は、走行輪部本体85の各連通部85dで接続部100を介して互いに接続されている。 The covering portion 86 is, for example, a secondary side of a double mold, and is formed of a member (synthetic resin) that is softer than the traveling wheel portion main body 85 such as an elastomer. Furthermore, the covering portion 86 includes an annular outer covering portion 97 that covers the outer peripheral side of the axially outer portion of the traveling wheel portion body 85, and an annular inner surface that covers the outer peripheral side of the axially inner portion of the traveling wheel portion main body 85. The outer cover 97 and the inner cover 98 are separated from each other substantially in parallel, and a mounting recess 99 for attaching the raised portion 87 between the cover 97 and 98 is formed. Yes. The covering portions 97 and 98 are connected to each other via the connecting portion 100 at each communicating portion 85d of the traveling wheel portion main body 85.

外側被覆部97は、走行輪部本体85の外側の端面85eおよび外周面85aの外側の部分を覆っており、外側凹部85bと嵌合している。したがって、外側被覆部97は、走行輪部本体85の外周側における床ブラシ20全体の側面方向の外側、すなわち走行輪部本体85の外周側における接続管22(図９)から遠い側の側部、換言すれば各走行輪23の走行輪部本体85の外周側、互いに他方の走行輪23と反対側の側部を覆っており、外側被覆部97の端面97aは、走行輪23の外側部全体を構成している。また、この外側被覆部97には、図５に示すように、走行輪部本体85の外側の端面85eの周方向の複数箇所、例えば走行輪規制部89の取付孔92の両端の外側の位置にそれぞれ形成された外側切欠部としての外側嵌合切欠部85fに嵌合する被覆部嵌合部(外側被覆部嵌合部)としての面積拡大部である外側嵌合突部97bが一体に形成されている。さらに、図１に示すように、この外側被覆部97の外周面97cは、取付凹部99側へと径方向に徐々に突出するように傾斜している。 The outer covering portion 97 covers the outer end surface 85e of the traveling wheel portion main body 85 and the outer portion of the outer peripheral surface 85a, and is fitted to the outer recessed portion 85b. Therefore, the outer covering portion 97 is on the outer side of the entire floor brush 20 on the outer peripheral side of the traveling wheel body 85, that is, on the side far from the connecting pipe 22 (FIG. 9) on the outer periphery of the traveling wheel body 85. In other words, the outer peripheral side of the traveling wheel part body 85 of each traveling wheel 23, the side part opposite to the other traveling wheel 23, is covered, and the end surface 97a of the outer covering portion 97 is the outer portion of the traveling wheel 23. It constitutes the whole. Further, as shown in FIG. 5, the outer covering portion 97 has a plurality of circumferential positions on the outer end face 85 e of the traveling wheel portion main body 85, for example, positions outside both ends of the mounting holes 92 of the traveling wheel restricting portion 89. The outer fitting protrusion 97b, which is an area-enlarged portion as the covering portion fitting portion (outer covering portion fitting portion) that fits into the outer fitting notch portion 85f as the outer notch portion formed in each, is integrally formed. Has been. Furthermore, as shown in FIG. 1, the outer peripheral surface 97c of the outer covering portion 97 is inclined so as to gradually protrude in the radial direction toward the mounting recess 99 side.

図５に示す各外側嵌合突部97bは、外側被覆部97(被覆部86)の厚みを増加させるとともに、この外側被覆部97(被覆部86)と走行輪部本体85との接触面積を増加させるための部分であり、外側被覆部97の端面97aと略面一に形成されており、かつ、外側被覆部97の中心軸側に突出し、走行輪部本体85の内周面と略面一となっている。 Each outer fitting protrusion 97b shown in FIG. 5 increases the thickness of the outer covering portion 97 (covering portion 86), and reduces the contact area between the outer covering portion 97 (covering portion 86) and the traveling wheel portion main body 85. It is a portion for increasing, is formed substantially flush with the end surface 97a of the outer covering portion 97, protrudes toward the central axis side of the outer covering portion 97, and is substantially flush with the inner peripheral surface of the traveling wheel portion main body 85. It is one.

また、図１に示す内側被覆部98は、走行輪部本体85の外周面85aの内側の部分を覆っている。また、この内側被覆部98は、端面98aが走行輪部本体85の内側の端面85gと略面一となっており、この端面85gに複数箇所、例えば各保持部95に対応する位置に切り欠き形成された内側切欠部としての内側嵌合切欠部85hに嵌合する内側被覆部嵌合部としての内側嵌合部98bが一体に形成されている。さらに、この内側被覆部98の外周面98cは、取付凹部99側へと径方向に徐々に突出するように傾斜している。 Further, the inner covering portion 98 shown in FIG. 1 covers an inner portion of the outer peripheral surface 85a of the traveling wheel portion main body 85. Further, the inner covering portion 98 has an end surface 98a that is substantially flush with the inner end surface 85g of the traveling wheel portion main body 85, and the end surface 85g is cut out at a plurality of positions, for example, positions corresponding to the holding portions 95. An inner fitting portion 98b as an inner covering portion fitting portion that fits into the inner fitting notch portion 85h as the formed inner notch portion is integrally formed. Further, the outer peripheral surface 98c of the inner covering portion 98 is inclined so as to gradually protrude in the radial direction toward the mounting recess 99 side.

各内側嵌合部98bは、基端側が内側嵌合切欠部85hの位置で走行輪部本体85の内側の端面85gと略面一に形成されており、先端側が各保持部95に沿って形成され、この先端側が、被覆部86を成形する際の図示しないゲートが形成される部分となっている。 Each inner fitting portion 98b is formed so that the base end side is substantially flush with the inner end face 85g of the traveling wheel body 85 at the position of the inner fitting notch 85h, and the distal end side is formed along each holding portion 95. The tip side is a portion where a gate (not shown) when the covering portion 86 is formed is formed.

また、取付凹部99は、走行輪部本体85の外周面85aの一部、すなわち連通部85d，85d間の領域を露出させる部分である。 The mounting recess 99 is a part exposing a part of the outer peripheral surface 85a of the traveling wheel part body 85, that is, a region between the communication parts 85d and 85d.

接続部100は、被覆部86を成形する部材を内側被覆部98の内側嵌合部98bに形成されたゲートから外側被覆部97側へと流通させる際に形成された部分である。すなわち、被覆部86は、内側嵌合部98bに形成されたゲートからの部材の注入によって外側被覆部97と内側被覆部98とが一体に形成される。 The connecting portion 100 is a portion formed when a member for forming the covering portion 86 is circulated from the gate formed in the inner fitting portion 98b of the inner covering portion 98 to the outer covering portion 97 side. That is, in the covering portion 86, the outer covering portion 97 and the inner covering portion 98 are integrally formed by injecting a member from the gate formed in the inner fitting portion 98b.

また、起毛部87は、図６に示すように、床ブラシ20を床面Ｆに載置した状態でこの床面Ｆに接触する部分である多数の起毛87aと、これら起毛87aを一体的に配置した被取付部としての被接着部、すなわち摩擦低減部本体である帯状のシート部87bとを備え、被覆部86よりも床面Ｆに対する摩擦が小さく設定されている。シート部87bは、取付凹部99に図示しない接着剤などを介して接着固定されている。また、シート部87bは、両端部が互いに隣接するように取付凹部99に全周に亘って巻き付けられている。すなわち、起毛部87は、走行輪23の全周に亘って配置されている。さらに、シート部87bの両端部は、例えば走行輪部本体85の外周面85a上に位置している。また、起毛87aは、被覆部86の外周面(外周面97c，98c)に対して径方向へと突出しているとともに、先端側がケース体21(床ブラシ20)の前進時の走行輪23(走行輪部52)の回転方向に沿って、すなわち図５の矢印Ｘ方向へと傾斜状に倒れるように湾曲している。そして、この起毛部87は、走行輪23をケース体21の軸受部61に軸支した状態で、起毛87aの先端側の前部がケース体21の前部よりも前方に位置しかつ前カバー25の前端部よりも後方に位置しているとともに、起毛87aの先端側の下部がケース体21の下面よりも下方に位置している。 Further, as shown in FIG. 6, the raised portion 87 has a large number of raised portions 87 a that are in contact with the floor surface F in a state where the floor brush 20 is placed on the floor surface F, and these raised portions 87 a integrally. A portion to be bonded as a mounted portion, that is, a belt-like sheet portion 87b which is a friction reducing portion main body is provided, and friction with respect to the floor surface F is set to be smaller than that of the covering portion 86. The sheet portion 87b is bonded and fixed to the mounting recess 99 via an adhesive (not shown). Further, the sheet portion 87b is wound around the entire mounting recess 99 so that both ends thereof are adjacent to each other. That is, the raised portions 87 are disposed over the entire circumference of the traveling wheel 23. Further, both end portions of the seat portion 87b are located on the outer peripheral surface 85a of the traveling wheel portion main body 85, for example. Further, the raised portions 87a protrude in the radial direction with respect to the outer peripheral surfaces (outer peripheral surfaces 97c, 98c) of the covering portion 86, and the tip side is the traveling wheel 23 (traveling) when the case body 21 (floor brush 20) is advanced. The ring portion 52) is bent along the rotation direction, that is, tilted in the direction of arrow X in FIG. Then, the raised portion 87 is in a state where the running wheel 23 is pivotally supported by the bearing portion 61 of the case body 21, and the front portion on the tip side of the raised portion 87a is located in front of the front portion of the case body 21, and the front cover The lower end of the raised portion 87a is positioned below the lower surface of the case body 21 while being positioned rearward of the front end portion of 25.

また、図４および図５に示すように、各コイルばね53は、一端部が各凹部76(図１)に保持され、他端部が各保持部95に保持されて、走行輪23の径方向に沿って放射状に配置されている。そして、これらコイルばね53は、互いに弾性係数が略等しく、外力を加えない状態で軸部51に対して走行輪部52を略同軸の位置となるように支持している。なお、コイルばね53以外でも、例えばゴム、板ばね、あるいはエラストマなどの弾性部材(可撓部材)により形成した任意の付勢手段を凹部76と保持部95との間に配置してもよく、また、走行輪部52を軸部51に対して内方へと、径方向に沿って付勢する引っ張りばねなどでもよい。 As shown in FIGS. 4 and 5, each coil spring 53 has one end portion held in each recess 76 (FIG. 1) and the other end portion held in each holding portion 95. It is arranged radially along the direction. The coil springs 53 have substantially the same elastic coefficient, and support the traveling wheel portion 52 at a substantially coaxial position with respect to the shaft portion 51 without applying an external force. In addition to the coil spring 53, any biasing means formed by an elastic member (flexible member) such as rubber, leaf spring, or elastomer may be disposed between the recess 76 and the holding portion 95, Further, a tension spring or the like that urges the traveling wheel portion 52 inward in the radial direction with respect to the shaft portion 51 may be used.

図１に示すように、抜止体54は、略円筒状に形成されており、軸部本体63内に嵌合されている。そして、抜止体54は、軸受部61のねじボス部69よりも大径に形成されており、このねじボス部69に対して固定手段であるねじ102を介して固定されている。この結果、軸受部61と抜止体54との間に、軸部51の抜止面部74が位置し、軸部51が軸受部61に対して抜け止めされている。 As shown in FIG. 1, the retaining member 54 is formed in a substantially cylindrical shape and is fitted in the shaft body 63. The retaining body 54 is formed to have a larger diameter than the screw boss portion 69 of the bearing portion 61 and is fixed to the screw boss portion 69 via a screw 102 that is a fixing means. As a result, the retaining surface portion 74 of the shaft portion 51 is located between the bearing portion 61 and the retaining member 54, and the shaft portion 51 is prevented from coming off from the bearing portion 61.

カバー55は、走行輪部本体85の一側を被覆する略円板状に形成されている。また、このカバー55の周縁部には、複数の爪部104が周方向に略等間隔に配置されている。これら爪部104は、走行輪部52の各取付孔92に挿入され、これら取付孔92の周方向の一側に形成された係止凸部105にそれぞれ係止されることにより、カバー55を走行輪部52に対して抜け止め固定している。さらに、カバー55の中央部には、径方向に沿って長手溝状の回動溝部106が形成されている。この回動溝部106は、カバー55を走行輪部52から取り外す際に、コインなどを挿入することでカバー55を周方向へと回動させるためのものである。 The cover 55 is formed in a substantially disc shape that covers one side of the traveling wheel portion main body 85. A plurality of claw portions 104 are arranged at substantially equal intervals in the circumferential direction on the peripheral edge portion of the cover 55. These claw portions 104 are inserted into the respective mounting holes 92 of the traveling wheel portion 52 and locked by locking projections 105 formed on one side in the circumferential direction of the mounting holes 92, whereby the cover 55 is It is fixed to the traveling wheel 52 so as not to come off. Further, a rotation groove 106 having a longitudinal groove shape is formed in the central portion of the cover 55 along the radial direction. The turning groove 106 is for turning the cover 55 in the circumferential direction by inserting a coin or the like when the cover 55 is removed from the traveling wheel portion 52.

また、前カバー25は、前側吸込口36の両端間に亘って連続した横長状に形成されており、断面視で前方へと突出するように円弧状に湾曲している。さらに、この前カバー25の上端部は、前側吸込口36の上端部に回動可能に軸支されており、かつ、トーションばねなどの図示しない前カバー付勢手段により前方向へと回動するように付勢されている。また、この前カバー25の下端寄りの位置には、突起部25a，25aが前方に向けて突出して形成されており、これら突起部25a，25aは、自然状態(通常状態)で各走行輪23の前端よりも前方に突出している。なお、これら突起部25a，25aは必須の構成ではなく、前カバー25自体の一部が各走行輪23の前端よりも前方に突出している構成でもよい。 Further, the front cover 25 is formed in a horizontally long shape extending between both ends of the front suction port 36, and is curved in an arc shape so as to protrude forward in a sectional view. Further, the upper end portion of the front cover 25 is pivotally supported by the upper end portion of the front suction port 36 and is rotated forward by a front cover urging means (not shown) such as a torsion spring. It is so energized. Further, at positions near the lower end of the front cover 25, protrusions 25a and 25a are formed to protrude forward, and these protrusions 25a and 25a are in the natural state (normal state) and each running wheel 23 is formed. Projects forward from the front end of the. Note that these protrusions 25a, 25a are not essential, and a part of the front cover 25 itself may protrude forward from the front end of each traveling wheel 23.

次に、上記第１の実施の形態の作用を説明する。 Next, the operation of the first embodiment will be described.

まず、各走行輪23の組み立て方法を説明する。 First, a method for assembling each traveling wheel 23 will be described.

走行輪部52は、走行輪部本体85を射出成形した後、この走行輪部本体85を金型のコア側として被覆部86を射出成形して形成する。 The traveling wheel portion 52 is formed by injection molding the traveling wheel portion main body 85 and then injection-molding the covering portion 86 with the traveling wheel portion main body 85 as the core side of the mold.

このとき、被覆部86は、内側被覆部98の内側嵌合部98bをゲートとして部材を射出することにより、この部材が走行輪部本体85の連通部85dから外側被覆部97側へと注入され、内側被覆部98と外側被覆部97とが接続部100を介して一体に成形される。 At this time, the covering portion 86 injects a member with the inner fitting portion 98b of the inner covering portion 98 as a gate, and this member is injected from the communication portion 85d of the traveling wheel portion main body 85 to the outer covering portion 97 side. The inner covering portion 98 and the outer covering portion 97 are integrally formed through the connection portion 100.

この状態で、被覆部86は、内側嵌合部98bが内側嵌合切欠部85hに嵌合し、外側嵌合突部97bが外側嵌合切欠部85fに嵌合することで、走行輪部本体85との接触面積が拡大される。 In this state, the covering portion 86 is configured such that the inner fitting portion 98b is fitted into the inner fitting cutout portion 85h, and the outer fitting projection 97b is fitted into the outer fitting cutout portion 85f, thereby The contact area with 85 is expanded.

そして、図２に示す状態から、図３の想像線に示すように、走行輪部52に対して軸部51を他端側から挿入する。具体的に、各軸部規制部82を各孔部91に嵌合させた状態で規制部本体81を挿通孔部93に他端側から挿入する。 Then, from the state shown in FIG. 2, as shown by the imaginary line in FIG. 3, the shaft portion 51 is inserted into the traveling wheel portion 52 from the other end side. Specifically, the restricting portion main body 81 is inserted into the insertion hole portion 93 from the other end side in a state where each shaft restricting portion 82 is fitted in each hole portion 91.

次いで、図３の実線に示すように、各軸部規制部82を各走行輪部規制部89よりも一端側へと位置させた状態で軸部51を走行輪部52に対して相対的に周方向(例えば時計回り方向)へと所定角度、本実施の形態では９０°程度回動させることにより、各軸部規制部82が各走行輪部規制部89の端面に摺接するとともに、図１(b)に示すように各走行輪部規制部89が嵌合部83に嵌合する。 Next, as shown by the solid line in FIG. 3, the shaft portion 51 is relatively positioned with respect to the traveling wheel portion 52 in a state where each shaft portion restricting portion 82 is positioned at one end side with respect to each traveling wheel portion restricting portion 89. By rotating a predetermined angle in the circumferential direction (for example, clockwise direction), approximately 90 ° in the present embodiment, each shaft portion restricting portion 82 comes into sliding contact with the end surface of each traveling wheel portion restricting portion 89, and FIG. As shown in (b), each traveling wheel portion restricting portion 89 is fitted to the fitting portion 83.

この状態で、軸部51の各係止突出部71が走行輪部52の各保持部95に対向する状態となるので、軸部51の中心位置を走行輪部52の中心位置に対して若干偏らせ、１つのコイルばね53の一端部に１つの係止突出部71を挿入させてこのコイルばね53の一端部を１つの凹部76に保持した状態で、このコイルばね53の他端部を１つの保持部95に嵌合保持する。 In this state, the locking projections 71 of the shaft part 51 are in a state of facing the holding parts 95 of the traveling wheel part 52, so that the center position of the shaft part 51 is slightly different from the center position of the traveling wheel part 52. In a state where one locking projection 71 is inserted into one end of one coil spring 53 and one end of the coil spring 53 is held in one recess 76, the other end of the coil spring 53 is One holding part 95 is fitted and held.

同様に、他の３つのコイルばね53の一端部にそれぞれ各係止突出部71を挿入させて、各コイルばね53の一端部を各凹部76に保持した状態で、図４に示すように、各コイルばね53の他端部を各保持部95に嵌合保持する。この状態で、各コイルばね53が各孔部91に嵌合して走行輪23の軸方向に露出している。 Similarly, in a state in which each locking projection 71 is inserted into one end of each of the other three coil springs 53 and one end of each coil spring 53 is held in each recess 76, as shown in FIG. The other end portion of each coil spring 53 is fitted and held in each holding portion 95. In this state, each coil spring 53 is fitted in each hole 91 and exposed in the axial direction of the traveling wheel 23.

さらに、取付凹部99に起毛部87のシート部87bを接着固定する。このとき、シート部87bは、一端部が取付凹部99に露出する走行輪部本体85の外周面85aに固定され、取付凹部99に沿って走行輪部本体85の外周を一周した位置で他端部が一端部に隣接して走行輪部本体85の外周面85aに固定される。なお、この起毛部87の取り付けは、走行輪部52を成形した後に行ってもよい。 Further, the sheet portion 87b of the raised portion 87 is bonded and fixed to the mounting recess 99. At this time, the seat part 87b is fixed to the outer peripheral surface 85a of the traveling wheel part body 85 whose one end part is exposed to the mounting recess 99, and the other end at a position where the outer periphery of the traveling wheel part body 85 makes one round along the mounting recess 99. The part is fixed to the outer peripheral surface 85a of the traveling wheel part body 85 adjacent to the one end part. The raising portion 87 may be attached after the traveling wheel portion 52 is molded.

この後、図１(a)および図１(b)に示すように、別途組み立てたケース体21の側部の各軸受部61に各軸部51の軸部本体63を嵌合させてねじボス部69を挿通孔73に挿通させ、抜止体54を軸部本体63内に嵌合させてねじ102をねじボス部69にねじ止めして、各軸部51をケース体21の軸受部61に回転自在に軸支する。 Thereafter, as shown in FIGS. 1 (a) and 1 (b), a shaft body 63 of each shaft portion 51 is fitted to each bearing portion 61 on the side portion of the separately assembled case body 21, thereby screw bosses. Portion 69 is inserted into insertion hole 73, retaining member 54 is fitted into shaft body 63, screw 102 is screwed to screw boss portion 69, and each shaft portion 51 is attached to bearing portion 61 of case body 21. It is pivotally supported.

さらに、カバー55の各爪部104を、走行輪部52の各取付孔92に一端側から挿入し、カバー55を周方向へと所定角度回動させることにより、各爪部104が各取付孔92の係止凸部105にそれぞれ係止され、カバー55が走行輪部52に固定される。 Further, each claw portion 104 of the cover 55 is inserted into each mounting hole 92 of the traveling wheel portion 52 from one end side, and the cover 55 is rotated by a predetermined angle in the circumferential direction, so that each claw portion 104 is fitted to each mounting hole. The cover 55 is fixed to the traveling wheel portion 52 by being respectively locked to the locking projections 105 of 92.

そして、掃除の際には、図１０に示すように、接続管22を延長管19の先端部に接続し、把持部17を把持して床ブラシ20を床面Ｆ(図７)上に載置する。 When cleaning, as shown in FIG. 10, the connecting pipe 22 is connected to the tip of the extension pipe 19, the gripping part 17 is gripped, and the floor brush 20 is placed on the floor F (FIG. 7). Put.

このとき、床ブラシ20は、接続管22がケース体21に対して回動可能であることにより、作業者が把持部17を把持している状態では、ケース体21側の重量バランス、例えばモータなどの重量によって、延長管19に接続された接続管22に対してケース体21が相対的に回動する。したがって、この回動に伴い、図７に示すように、床ブラシ20を床面Ｆ上に載置しようとする際には、ケース体21の左右幅方向両側のいずれか一方が他方に対して下側へと傾斜し、ケース体21の左右幅方向両側のいずれか一方に位置する走行輪23の外側に位置する被覆部86の外側被覆部97が床面Ｆに最初に当接し、その後、ケース体21の左右幅方向両側の他方側が床面Ｆに接触する。したがって、床ブラシ20を床面Ｆ上に載置する際には、走行輪部本体85よりも軟質の部材で形成された被覆部86(外側被覆部97)が床面Ｆに対して緩衝性を確保する。 At this time, the floor brush 20 has a weight balance on the case body 21 side, for example, a motor, in a state where the operator holds the grip portion 17 because the connecting pipe 22 is rotatable with respect to the case body 21. The case body 21 rotates relative to the connection pipe 22 connected to the extension pipe 19 due to the weight of the above. Accordingly, as shown in FIG. 7, when the floor brush 20 is to be placed on the floor surface F along with this rotation, either one of the both sides in the left-right width direction of the case body 21 is in relation to the other. The outer covering portion 97 of the covering portion 86 that is inclined to the lower side and is located on the outer side of the traveling wheel 23 located on either one of the left and right width direction sides of the case body 21 first contacts the floor surface F. The other side of the both sides in the left-right width direction of the case body 21 contacts the floor surface F. Accordingly, when the floor brush 20 is placed on the floor surface F, the covering portion 86 (outer covering portion 97) formed of a softer member than the traveling wheel portion main body 85 is buffered against the floor surface F. Secure.

そして、作業者は、図１０に示す把持部17の所望の設定ボタン18を操作して電動送風機13を所望の動作モードで動作させた状態で、延長管19を介して床ブラシ20を前後に交互に走行させる。 Then, the operator operates the desired setting button 18 of the gripping part 17 shown in FIG. 10 to operate the electric blower 13 in the desired operation mode, and moves the floor brush 20 back and forth via the extension pipe 19. Drive alternately.

図１に示すように、床ブラシ20は、走行の際に、各走行輪23の起毛部87の起毛87aが床面Ｆに接触して回転することにより、良好な走行性を得ることができる。 As shown in FIG. 1, the floor brush 20 can obtain good traveling performance by rotating the raised portions 87a of the raised portions 87 of the traveling wheels 23 in contact with the floor surface F during traveling. .

すなわち、床ブラシ20を前方へと走行させる際には、作業者が把持部17(図１０)を介して床ブラシ20を床面Ｆへと押し付けるように力を加える。このとき、各走行輪23では、起毛部87の起毛87aが床面Ｆへと押し付けられて抵抗となるものの、起毛87a自体は先端側が前側へと傾斜しているために、床面Ｆ上を前方へと走行、すなわち各走行輪23が前方へと回転する際には抵抗となりにくい。この結果、床ブラシ20と床面Ｆとの間で適度な抵抗が生じ、各走行輪23が床面Ｆに対して空回りしたり過剰に引っ掛かったりすることなく円滑に前方へと走行可能となる。一方で、床ブラシ20を後方へと走行させる際には、作業者が把持部17(図１０)を介して床ブラシ20を床面Ｆから後方上側へと引くように力を加える。このとき、各走行輪23では、起毛部87の起毛87aが床面Ｆから離間される方向へと引っ張られ抵抗が低減されるものの、起毛部87の起毛87aの先端側が前側へと傾斜しているので、床面Ｆ上を後方へと走行、すなわち各走行輪23が後方へと回転する際に床面Ｆに対して起毛87aが引っ掛かって適度な抵抗を与える。この結果、床ブラシ20と床面Ｆとの間で適度な抵抗が生じ、各走行輪23が床面Ｆに対して空回りしたり過剰に引っ掛かったりすることなく円滑に後方へと走行可能となる。 That is, when traveling the floor brush 20 forward, the operator applies a force so as to press the floor brush 20 against the floor surface F via the gripping portion 17 (FIG. 10). At this time, in each traveling wheel 23, the raised portions 87a of the raised portions 87 are pressed against the floor surface F to become resistance, but the raised portions 87a themselves are inclined on the front side, so When traveling forward, that is, when each traveling wheel 23 rotates forward, resistance hardly occurs. As a result, an appropriate resistance is generated between the floor brush 20 and the floor surface F, and each traveling wheel 23 can smoothly travel forward without being idle or excessively caught on the floor surface F. . On the other hand, when the floor brush 20 is caused to travel backward, the operator applies a force so as to pull the floor brush 20 from the floor surface F to the upper rear side via the gripping portion 17 (FIG. 10). At this time, in each traveling wheel 23, the raised portion 87a of the raised portion 87 is pulled away from the floor surface F to reduce the resistance, but the tip side of the raised portion 87a of the raised portion 87 is inclined forward. Therefore, when the vehicle travels backward on the floor surface F, that is, when each traveling wheel 23 rotates rearward, the raised portions 87a are caught on the floor surface F to give an appropriate resistance. As a result, an appropriate resistance is generated between the floor brush 20 and the floor surface F, and each traveling wheel 23 can smoothly travel backward without idling or excessively catching on the floor surface F. .

そして、床ブラシ20では、吸込口35を介して、図１０に示す電動送風機13の動作により作用する負圧によって床面Ｆ(図７)上の塵埃を空気とともに吸い込んで掃除する。この吸い込まれた空気は吸込風となり、塵埃とともに、図１０に示す延長管19、ホース体15および本体吸込口14を介して集塵部へと吸い込まれ、この集塵部で塵埃が捕集された後、電動送風機13へと吸い込まれて排気風となり、掃除機本体12の図示しない排気孔から排気される。 In the floor brush 20, the dust on the floor surface F (FIG. 7) is sucked together with the air by the negative pressure acting by the operation of the electric blower 13 shown in FIG. The sucked air is sucked in and is sucked together with dust into the dust collecting part through the extension pipe 19, the hose body 15 and the main body suction port 14 shown in FIG. 10, and the dust is collected in this dust collecting part. After that, it is sucked into the electric blower 13 to become exhaust air, and is exhausted from an exhaust hole (not shown) of the cleaner body 12.

また、図６(a)に示すように、床ブラシ20を前方へと走行させてこの床ブラシ20が壁あるいは家具などの障害物Ｏに衝突する際には、まず、前カバー25の各突起部25aが障害物Ｏに接触してこの前カバー25が前カバー付勢手段の付勢に抗して後方へと回動し、次いで、図６(b)に示すように、走行輪23の前部が障害物Ｏに接触する。 Further, as shown in FIG. 6 (a), when the floor brush 20 runs forward and the floor brush 20 collides with an obstacle O such as a wall or furniture, first, each protrusion of the front cover 25 is projected. The portion 25a comes into contact with the obstacle O, and the front cover 25 rotates rearward against the urging force of the front cover urging means. Next, as shown in FIG. The front part contacts the obstacle O.

この状態で、さらに床ブラシ20が前方へと走行することにより、図６(c)に示すように、各走行輪23の走行輪部52が障害物Ｏの位置に固定されることで、軸部51およびケース体21が、コイルばね53の付勢に抗しつつ走行輪部52に対して相対的に前方下側へと移動する。このため、各コイルばね53の伸縮によって衝突時の衝撃が吸収される。また、同時に前カバー25が後方へと回動して下部が開口した前側吸込口36(図６(b))の下部から、回転ブラシ32の清掃部材38の先端側の一部が前方へと突出して障害物Ｏの近傍に位置するとともに、清掃部材38の先端側の一部が各走行輪23に対して相対的に下方へと突出し、床面Ｆに接触する。そして、所定の設定ボタン18(図１０)の操作により回転ブラシ32が回転することで、回転ブラシ32が障害物Ｏの近傍の床面Ｆ上の塵埃を掻き取り、前側吸込口36(図６(b))から吸い込んで掃除する。 In this state, when the floor brush 20 further travels forward, the traveling wheel portion 52 of each traveling wheel 23 is fixed at the position of the obstacle O as shown in FIG. The part 51 and the case body 21 are moved forward and downward relative to the traveling wheel part 52 while resisting the bias of the coil spring 53. For this reason, the impact at the time of collision is absorbed by the expansion and contraction of each coil spring 53. At the same time, a part of the front end of the cleaning member 38 of the rotary brush 32 is moved forward from the lower part of the front suction port 36 (FIG. 6B) where the front cover 25 is rotated rearward and the lower part is opened. While projecting and located in the vicinity of the obstacle O, a part of the front end side of the cleaning member 38 projects downward relative to each traveling wheel 23 and contacts the floor surface F. Then, when the rotary brush 32 is rotated by the operation of a predetermined setting button 18 (FIG. 10), the rotary brush 32 scrapes off dust on the floor surface F in the vicinity of the obstacle O, and the front suction port 36 (FIG. 6). Inhale from (b)) and clean.

また、床ブラシ20が障害物Ｏから離間する場合には、コイルばね53が床ブラシ20を障害物Ｏから離間する方向へと押圧することで床ブラシ20が障害物Ｏから離間することを補助するため、床ブラシ20の走行操作が容易になり、走行操作を行う作業者の手の負担を軽減できる。 Further, when the floor brush 20 is separated from the obstacle O, the coil spring 53 assists the separation of the floor brush 20 from the obstacle O by pressing the floor brush 20 in a direction away from the obstacle O. Therefore, the traveling operation of the floor brush 20 is facilitated, and the burden on the hand of the operator who performs the traveling operation can be reduced.

上述したように、上記第１の実施の形態によれば、走行輪部本体85よりも軟質の部材により形成した被覆部86で走行輪部本体85の少なくとも軸方向外側部の外周側を覆うとともに、走行輪部本体85の外周側に、先端側が被覆部86よりも外周側に突出しこの被覆部86よりも床面Ｆに対する摩擦が小さい起毛部87を配置することで、床ブラシ20を床面Ｆに載置する際に接続管22を中心として相対的にケース体21が回動しても、このケース体21の両側に位置する走行輪23の被覆部86(外側被覆部97)が床面Ｆに当接するので、床面Ｆとの緩衝性を確保でき、床ブラシ20を床面Ｆに載置する際の騒音を抑制できるとともに、走行時には、起毛部87の起毛87aが床面Ｆに接触するので、走行性を確保しつつ、この走行時の騒音の発生を抑制できる。 As described above, according to the first embodiment, at least the outer peripheral side of the outer side in the axial direction of the traveling wheel part body 85 is covered with the covering portion 86 formed of a softer member than the traveling wheel part body 85. Further, by arranging a brushed portion 87 on the outer peripheral side of the traveling wheel portion main body 85 with the tip side protruding toward the outer peripheral side from the covering portion 86 and having a smaller friction against the floor surface F than the covering portion 86, the floor brush 20 is placed on the floor surface. Even when the case body 21 is rotated relative to the connecting pipe 22 when placed on the F, the covering portions 86 (outer covering portions 97) of the traveling wheels 23 located on both sides of the case body 21 are the floor. Since it abuts against the surface F, it is possible to secure a buffering property with the floor surface F, to suppress noise when the floor brush 20 is placed on the floor surface F, and during the running, the raised portions 87a of the raised portions 87 are connected to the floor surface F. Therefore, it is possible to suppress the generation of noise during traveling while ensuring traveling performance.

すなわち、作業者が把持部17(図１０)を把持している状態では、ケース体21側の重量バランス、例えばモータなどの重量によって、延長管19に接続された接続管22(図６)に対してケース体21が相対的に回動し、ケース体21の左右幅方向両側のいずれか一方が他方に対して下側へと傾斜するものの、ケース体21の左右幅方向両側のいずれか一方に位置する走行輪23の外側に位置し走行輪部本体85よりも軟質の部材で形成された被覆部86の外側被覆部97が床面Ｆに最初に当接することにより、床面Ｆに対して緩衝性を確保できる。しかも、走行時には、被覆部86ではなく起毛部87の起毛87aが床面Ｆに接触するので、被覆部86を床面Ｆに接触させる場合と比較して床ブラシ20を横滑りさせやすくなり、壁側などへと床ブラシ20の側部を近づけやすくなるなど、走行性を確保できる。 That is, in a state where the operator is holding the holding portion 17 (FIG. 10), the connection pipe 22 (FIG. 6) connected to the extension pipe 19 is caused by the weight balance on the case body 21 side, for example, the weight of a motor or the like. While the case body 21 is relatively rotated and either one of the both sides in the left-right width direction of the case body 21 is inclined downward with respect to the other, either one of the both sides in the left-right width direction of the case body 21 The outer covering portion 97 of the covering portion 86 formed of a member softer than the traveling wheel portion main body 85 located outside the traveling wheel 23 located in the first position abuts against the floor surface F. And buffering can be secured. In addition, during running, the raised portion 87a of the raised portion 87, not the covering portion 86, comes into contact with the floor surface F, so that the floor brush 20 is more easily slid compared to the case where the covering portion 86 is brought into contact with the floor surface F. For example, it becomes easier to bring the side portion of the floor brush 20 closer to the side or the like.

また、被覆部86の外周面(外周面97c，98c)側に、起毛部87が取り付けられる取付凹部99を形成することにより、起毛部87のシート部87bの端面が取付凹部99内に位置して外部に露出せず、この取付凹部99によって保護されるので、起毛部87が走行輪部本体85および被覆部86に対してシート部87bの端面などから剥がれにくくなる。 Further, by forming an attachment recess 99 to which the raised portion 87 is attached on the outer peripheral surface (outer peripheral surfaces 97c, 98c) side of the covering portion 86, the end surface of the sheet portion 87b of the raised portion 87 is positioned in the attachment recess 99. Therefore, the raised portions 87 are not easily peeled off from the end surface of the seat portion 87b with respect to the traveling wheel portion main body 85 and the covering portion 86.

しかも、各走行輪23はケース体21の両側部に位置していることにより、特に起毛部87の起毛87aに床面Ｆ上の塵埃が付着した場合目立ちやすくなるものの、起毛部87を幅狭に形成することにより、起毛部87を走行輪23の幅方向全体に亘って形成した場合と比較して、汚れが目立ちにくい。 In addition, since each running wheel 23 is located on both sides of the case body 21, the raised portions 87 are narrower, although it is particularly noticeable when dust on the floor surface F adheres to the raised portions 87a of the raised portions 87. As a result of the formation, the raised portions 87 are less noticeable than in the case where the raised portions 87 are formed over the entire width of the traveling wheel 23.

さらに、起毛部87のシート部87bを、取付凹部99に露出した走行輪部本体85の外周面85aに接着することにより、例えば走行輪部本体85よりも軟質の被覆部86に接着する場合と比較して、接着性が良好となって強固に固定でき、起毛部87がより剥がれにくくなる。特に、シート部87bの両端部を走行輪部本体85の位置に接着することにより、これら端部を走行輪部52に対してより強固に固定でき、起毛部87の剥がれをより効果的に抑制できる。 Further, by adhering the sheet portion 87b of the raised portion 87 to the outer peripheral surface 85a of the traveling wheel portion body 85 exposed in the mounting recess 99, for example, when adhered to the cover portion 86 that is softer than the traveling wheel portion body 85 In comparison, the adhesiveness is good and it can be firmly fixed, and the raised portions 87 are more difficult to peel off. In particular, by adhering both end portions of the seat portion 87b to the position of the traveling wheel portion main body 85, these end portions can be more firmly fixed to the traveling wheel portion 52, and peeling of the raised portions 87 can be more effectively suppressed. it can.

そして、起毛部87の起毛87aの先端側をケース体21(床ブラシ20)の前進時の各走行輪23の回転方向に沿って倒すことにより、各走行輪23(各走行輪部52)が前方へと回転する(床ブラシ20のケース体21が前方へと移動する)際には起毛87aが床面Ｆに押し付けられるものの床面Ｆに対して抵抗になりにくく、各走行輪23(各走行輪部52)が後方へと回転する(床ブラシ20のケース体21が後方へと移動する)際には、床面Ｆには押し付けられないものの起毛87aが床面Ｆに引っ掛かって適度な抵抗を与えるので、前後いずれの回転に対しても各走行輪23(各走行輪部52)と床面Ｆとの間に適度な抵抗を与えて各走行輪23(各走行輪部52)円滑に回転させることができ、良好な走行性を得ることができる。 Then, each traveling wheel 23 (each traveling wheel portion 52) is brought down by tilting the front end side of the raising portion 87a of the raising portion 87 along the rotation direction of each traveling wheel 23 when the case body 21 (floor brush 20) moves forward. When rotating forward (the case body 21 of the floor brush 20 moves forward), the raised portions 87a are pressed against the floor surface F, but hardly resist against the floor surface F, and each traveling wheel 23 (each When the traveling wheel portion 52) rotates rearward (the case body 21 of the floor brush 20 moves rearward), the brushed portion 87a is caught on the floor surface F, although it is not pressed against the floor surface F. Since resistance is given, each running wheel 23 (each running wheel portion 52) is smooth by giving an appropriate resistance between each running wheel 23 (each running wheel portion 52) and the floor surface F with respect to any rotation in the front and rear directions. It is possible to obtain a good running performance.

さらに、被覆部86には、走行輪部本体85の外側部に位置しこの走行輪部本体85と嵌合する外側嵌合突部97bを走行輪部本体85の中心軸方向に向けて周方向に複数形成することにより、これら外側嵌合突部97bによって被覆部86(外側被覆部97)の厚みを増加させて被覆部86での床面Ｆに対する緩衝性を向上できる。また、外側被覆部97は、床ブラシ20を床面Ｆに載置する際に床面Ｆと当接することにより、衝撃が加わりやすい箇所であるため、この衝撃によって走行輪部本体85から剥がれやすくなるおそれがある。したがって、被覆部86の外側被覆部97に外側嵌合突部97bを形成することにより、これら外側嵌合突部97bによって走行輪部本体85と被覆部86との接触面積を増加させ、これら走行輪部本体85と被覆部86とを互いに剥がれにくく強固に一体化できる。さらに、これら外側嵌合突部97bは、走行輪部本体85の内周面と略面一に形成されているため、意匠的に目立ちにくく、見栄えを低下させることがない。 Further, the covering portion 86 has an outer fitting projection 97b that is located on the outer side of the traveling wheel body 85 and that fits with the traveling wheel body 85 in the circumferential direction toward the central axis direction of the traveling wheel body 85. By forming a plurality of them, the thickness of the covering portion 86 (outer covering portion 97) can be increased by these outer fitting protrusions 97b, and the cushioning property against the floor surface F at the covering portion 86 can be improved. Further, since the outer covering portion 97 is a portion where an impact is easily applied by contacting the floor surface F when the floor brush 20 is placed on the floor surface F, the outer covering portion 97 is easily peeled off from the traveling wheel portion main body 85 by the impact. There is a risk. Accordingly, by forming the outer fitting protrusions 97b on the outer covering portion 97 of the covering portion 86, the contact area between the traveling wheel body 85 and the covering portion 86 is increased by the outer fitting protrusions 97b, and these traveling The ring body 85 and the covering portion 86 can be firmly integrated with each other so that they do not easily peel off from each other. Furthermore, these outer fitting protrusions 97b are formed so as to be substantially flush with the inner peripheral surface of the traveling wheel portion main body 85, so that they are not conspicuous in design and do not deteriorate the appearance.

また、ケース体21に回転可能に軸支した軸部51と、この軸部51と走行輪部52との間これら軸部51と走行輪部52とを相対的に付勢するコイルばね53を介在させることにより、これらコイルばね53の弾性によって、床面Ｆとの緩衝性をより向上でき、床ブラシ20を床面Ｆに載置する際の騒音をより抑制できるとともに、走行輪部52が障害物Ｏに衝突すると、コイルばね53により付勢されながら走行輪部52が軸部51およびケース体21に対して移動して衝撃を吸収するので、例えば走行輪部52をより軟質化したり厚みを増加させたりすることなどによって走行性を低下させることなく、緩衝性をより向上できる。 Further, a shaft portion 51 rotatably supported by the case body 21 and a coil spring 53 that biases the shaft portion 51 and the traveling wheel portion 52 relatively between the shaft portion 51 and the traveling wheel portion 52 are provided. By interposing, the elasticity of these coil springs 53 can further improve the buffering property with respect to the floor surface F, further suppress the noise when the floor brush 20 is placed on the floor surface F, and the traveling wheel portion 52 When it collides with the obstacle O, the traveling wheel portion 52 moves with respect to the shaft portion 51 and the case body 21 while being urged by the coil spring 53 and absorbs the impact. For example, the traveling wheel portion 52 becomes softer or thicker. The buffering property can be further improved without degrading the running performance by increasing or the like.

すなわち、走行輪部52を弾性部材などとしてその厚みを増加させて充分な緩衝性を得ようとする場合などでは、走行輪部52が床面Ｆに接触した際に、床ブラシ20の自重によって走行輪部52が撓み、床面Ｆに対する接地面積(グリップ力)が大きくなって走行性が低下するおそれがあるのに対して、上記第１の実施の形態では、走行輪部52の厚みを増加させることなくコイルばね53によって大きな緩衝ストロークを得ることができるので、走行時に走行輪部52が撓んでグリップ力が大きくなることがなく、より良好な走行性を得ることができる。 That is, in the case where the running wheel 52 is made of an elastic member or the like to increase its thickness to obtain sufficient buffering properties, when the running wheel 52 comes into contact with the floor surface F, the weight of the floor brush 20 is reduced. While the traveling wheel portion 52 is bent and the ground contact area (grip force) with respect to the floor surface F is increased, the traveling performance may be reduced. In the first embodiment, the thickness of the traveling wheel portion 52 is reduced. Since a large cushioning stroke can be obtained by the coil spring 53 without increasing it, the traveling wheel portion 52 does not bend during traveling and the gripping force does not increase, and better traveling performance can be obtained.

また、床ブラシ20は、上下方向に回動可能な接続管22を備えているため、作業者が手元操作部16の把持部17を把持した状態で床ブラシ20を床面Ｆ上に載置する際に、延長管19を介して手元操作部16側に固定された接続管22に対してケース体21の前側がケース体21の自重によって下方へと回動し(図８の実線)、ケース体21の前側から床面Ｆへと接地しようとする。このため、走行輪23の中心位置、すなわちケース体21の軸受部61に軸支される走行輪23の軸部51の位置を、接続管22の回動軸の中心位置よりも前側に位置させることにより、図８に示すように床ブラシ20を床面Ｆに載置する際に、走行輪23の起毛部87がケース体21よりも先に床面Ｆに接地するので、床ブラシ20を床面Ｆ上に載置する際の衝撃を走行輪23の起毛部87によって緩衝できる。 Further, since the floor brush 20 is provided with a connecting tube 22 that can be rotated in the vertical direction, the floor brush 20 is placed on the floor surface F in a state where the operator grips the grip portion 17 of the hand operation portion 16. In doing so, the front side of the case body 21 is rotated downward by the weight of the case body 21 with respect to the connection pipe 22 fixed to the hand operation section 16 side via the extension pipe 19 (solid line in FIG. 8). Attempt to ground from the front side of the case body 21 to the floor F. Therefore, the center position of the traveling wheel 23, that is, the position of the shaft portion 51 of the traveling wheel 23 that is pivotally supported by the bearing portion 61 of the case body 21 is positioned in front of the center position of the rotation shaft of the connecting pipe 22. Accordingly, when the floor brush 20 is placed on the floor surface F as shown in FIG. 8, the raised portions 87 of the running wheels 23 are grounded to the floor surface F before the case body 21. The impact at the time of mounting on the floor surface F can be buffered by the raised portions 87 of the traveling wheels 23.

さらに、走行輪23を、ケース体21の両側部にそれぞれ配置することにより、例えば走行輪23をケース体21の中央部１箇所のみに配置する場合などと比較して、走行性をより向上できるとともに、床ブラシ20の前側が障害物Ｏに衝突する際に、床ブラシ20と障害物Ｏとの角度に拘らず少なくともいずれかの走行輪23を確実に障害物Ｏに接触させることができるので、緩衝性を確保できる。しかも、障害物Ｏの近傍を掃除する際には、作業者が床ブラシ20を障害物Ｏに対して押し付けるため、この押し付けによって走行輪23，23の軸部51(ケース体21の軸受部61)が走行輪部52，52に対してコイルばね53の付勢に抗して相対的に前方下側へと移動してケース体21が沈み込んで障害物Ｏの近傍の床面Ｆに接近するので、吸込口35および前側吸込口36からの塵埃の吸い込み、および、回転ブラシ32による床面Ｆからの塵埃の掻き出しがそれぞれ向上し、障害物Ｏの近傍を効率よく掃除できる。 Further, by arranging the traveling wheels 23 on both sides of the case body 21, for example, the traveling performance can be further improved as compared with the case where the traveling wheels 23 are disposed only at one central portion of the case body 21. In addition, when the front side of the floor brush 20 collides with the obstacle O, at least one of the traveling wheels 23 can be reliably brought into contact with the obstacle O regardless of the angle between the floor brush 20 and the obstacle O. , Buffering can be secured. Moreover, when the vicinity of the obstacle O is cleaned, the operator presses the floor brush 20 against the obstacle O, so that the pressing causes the shaft portions 51 of the traveling wheels 23 and 23 (the bearing portions 61 of the case body 21). ) Moves relative to the traveling wheel portions 52 and 52 against the bias of the coil spring 53 and moves forward and lower, the case body 21 sinks and approaches the floor surface F in the vicinity of the obstacle O. Therefore, the suction of dust from the suction port 35 and the front suction port 36 and the scraping of dust from the floor surface F by the rotating brush 32 are improved, and the vicinity of the obstacle O can be efficiently cleaned.

そして、走行輪23の一部をケース体21よりも前側に突出させることにより、掃除の際に床ブラシ20を前後方向に走行させたときに、障害物Ｏに対して走行輪23がケース体21よりも先に接触するので、床ブラシ20の前側を障害物Ｏに衝突させた際の衝撃を走行輪23によって緩衝できる。 Then, by causing a part of the traveling wheel 23 to protrude forward from the case body 21, the traveling wheel 23 can move against the obstacle O when the floor brush 20 travels in the front-rear direction during cleaning. Since the contact is made before 21, the impact when the front side of the floor brush 20 collides with the obstacle O can be buffered by the traveling wheels 23.

また、付勢手段としてコイルばね53を用いることにより、走行輪部52を軸部51に対して均一に支持しやすくなるとともに、コイルばね53自体の劣化も少なく、また、緩衝用のストロークを大きく取ることができて充分な緩衝性を得ることができる。 Further, by using the coil spring 53 as the urging means, it becomes easier to uniformly support the traveling wheel portion 52 with respect to the shaft portion 51, the deterioration of the coil spring 53 itself is small, and the buffer stroke is increased. And sufficient buffering properties can be obtained.

さらに、走行輪23は、走行輪部52が大径に形成されているので、段差などの乗り越えが円滑となり、良好な走行性を得ることができる。そして、走行輪部52の起毛部87を軟質とすることにより、障害物Ｏへの衝突時に、この障害物Ｏを傷付けることもない。 Further, since the traveling wheel portion 52 is formed with a large diameter, the traveling wheel 23 can smoothly get over a step or the like, and good traveling performance can be obtained. Further, by making the raised portion 87 of the traveling wheel portion 52 soft, the obstacle O is not damaged at the time of collision with the obstacle O.

なお、上記第１の実施の形態において、走行輪23は、コイルばね53を用いずに、軸部51の外周側と走行輪部52の内周側との間の全周に、図１１に示す第２の実施の形態のように、例えばゴム、板ばね、あるいはエラストマなどの弾性部材(可撓部材)により環状に形成された付勢手段108を配置する構成としてもよい。この場合でも、上記第１の実施の形態と同様の作用効果を奏することができる。 In the first embodiment, the traveling wheel 23 is not used in the coil spring 53, and the entire circumference between the outer peripheral side of the shaft portion 51 and the inner peripheral side of the traveling wheel portion 52 is shown in FIG. As in the second embodiment shown, the biasing means 108 formed in an annular shape by an elastic member (flexible member) such as rubber, leaf spring, or elastomer may be arranged. Even in this case, the same operational effects as those of the first embodiment can be obtained.

また、走行輪部52をケース体21に対して直接回転可能に軸支してもよい。 Further, the traveling wheel portion 52 may be pivotally supported with respect to the case body 21 so as to be directly rotatable.

さらに、被覆部86は、少なくとも走行輪部本体85の外周側の外側部を覆うように構成すればよい。すなわち、被覆部86としては、例えば上記外側被覆部97のみの構成などでもよい。 Furthermore, the covering portion 86 may be configured to cover at least the outer portion on the outer peripheral side of the traveling wheel portion main body 85. That is, as the covering portion 86, for example, a configuration including only the outer covering portion 97 may be used.

また、摩擦低減部としては、被覆部86よりも床面Ｆに対して摩擦が小さいものであれば、起毛部87に限らず、例えば布などの部材を用いてもよい。 Further, as the friction reducing portion, as long as the friction with respect to the floor surface F is smaller than that of the covering portion 86, not only the raised portion 87 but also a member such as a cloth may be used.

そして、上記各実施の形態において、電気掃除機11の細部は、上記構成に限定されるものではなく、例えばキャニスタ型の電気掃除機11だけでなく、縦長の掃除機本体12の下部に床ブラシ20を接続したアップライト型の電気掃除機など、任意の電気掃除機でも対応させることができる。 In each of the above embodiments, the details of the vacuum cleaner 11 are not limited to the above configuration. For example, not only the canister type vacuum cleaner 11 but also a floor brush at the bottom of the vertically long vacuum cleaner body 12 Any vacuum cleaner, such as an upright vacuum cleaner with 20 connected, can be used.

11 電気掃除機
12 掃除機本体
13 電動送風機
20 吸込口体としての床ブラシ
21 ケース体
22 接続管
51 軸部
52 回転体部としての走行輪部
53 付勢手段としてのコイルばね
85 回転体部本体としての走行輪部本体
86 被覆部
87 摩擦低減部としての起毛部
87a 起毛
97b 被覆部嵌合部としての外側嵌合突部
99 取付凹部
108 付勢手段 11 Vacuum cleaner
12 Vacuum cleaner body
13 Electric blower
20 Floor brush as suction port
21 Case body
22 Connection pipe
51 Shaft
52 Running wheel as a rotating body
53 Coil spring as biasing means
85 Running wheel body as a rotating body
86 Covering part
87 Raised part as friction reducing part
87a Brushed
97b Outer mating protrusion as cover mating part
99 Mounting recess
108 Energizing means

Claims

A case body elongated in the width direction;
A cylindrical connecting pipe connected to be rotatable at least in the circumferential direction between both sides in the width direction of the case body;
A rotating body portion rotatably disposed on both sides of the case body,
The rotating body part is
An annular rotor body having an axial direction along the width direction of the case body;
A covering portion that is formed of a softer member than the rotating body main body and covers at least the outer peripheral side of the outer side in the axial direction of the rotating body main body;
A suction port characterized by comprising a friction reducing portion located on the outer peripheral side of the rotating body main body, the tip side projecting to the outer peripheral side than the covering portion, and having a smaller friction with respect to the surface to be cleaned than the covering portion. body.

The covering portion includes a plurality of covering portion fitting portions in the circumferential direction that are positioned on the outer side of the rotating body main body and project toward the central axis side of the rotating body main body to be fitted to the rotating body main body. The suction inlet according to claim 1, wherein

A shaft portion that is rotatably supported by the case body and at least a part of which is located on the inner peripheral side of the rotating body portion;
The suction port according to claim 1 or 2, further comprising: an urging means interposed between the shaft portion and the rotating body portion and relatively biasing the shaft portion and the rotating body portion. body.

The suction port body according to any one of claims 1 to 3, wherein the covering portion has an attachment concave portion to which at least a part of the friction reduction portion is attached on the outer peripheral surface side.

A part of the rotating body is exposed in the mounting recess,
The suction port body according to claim 4, wherein at least a part of the friction reducing portion is bonded to the rotating body main body exposed in the mounting recess.

The suction port body according to any one of claims 1 to 5, wherein the friction reduction part has a raised portion whose tip side falls down along the rotation direction of the rotating body part when the case body moves forward.

A vacuum cleaner body containing an electric blower,
A vacuum cleaner comprising a suction port body according to any one of claims 1 to 6, wherein a rotary tube is connected in communication with the suction side of the electric blower.