JP4240292B2

JP4240292B2 - Dish brush for cleaning car

Info

Publication number: JP4240292B2
Application number: JP2003147051A
Authority: JP
Inventors: 悟知和田
Original assignee: Howa Machinery Ltd
Current assignee: Howa Machinery Ltd
Priority date: 2003-05-26
Filing date: 2003-05-26
Publication date: 2009-03-18
Anticipated expiration: 2023-05-26
Also published as: JP2004344536A

Description

【０００１】
【発明の属する技術分野】
本発明は、路面清掃車用の皿型ブラシ(側ブラシ)に関する。
【０００２】
【従来の技術】
特許文献１では、鋼線保持円盤を、円周方向に４つに分割した扇形片から構成し、各扇形片に厚さ方向に沿って下方に向くにつれて半径方向外側に傾斜した鋼毛挿嵌溝孔を設けてその角孔部に鋼毛を２つ折にして半径方向に密接状態に挿入し、鋼毛挿嵌溝孔間には鋼毛の根元部分の折損を防止する鋼毛折損防止金具を配設している。特許文献２のものは、清掃車用の皿型ブラシではないが、束ねた鋼線を２つ折にして根元部に樹脂パイプを嵌め込んでいる円形のブラシである。この樹脂パイプは針金で円盤に鋼線を取り付けるときの損傷防止のものである。特許文献３では、鋼線ホルダーに鋼線を折り曲げて多数保持させてユニット化してそのユニットを円盤に取り付けるようにしている。
【０００３】
【特許文献１】
実公平１−１１０７４号公報
【特許文献２】
実公昭５７−１２９０９号公報
【特許文献３】
アメリカ特許３６７８５３０号公報
【０００４】
【発明が解決しようとする課題】
特許文献１では、鋼毛折損防止金具を鋼毛挿嵌溝孔間の全てに配置すると、隣り合う鋼毛挿嵌溝孔間隔が広くなり円周方向において鋼毛の間に多くの隙間が存在して路面に対する清掃作用が効果的に行なわれない。そのため、特許文献１に示される実施形態では、１つの扇形片について、その円周方向両端面近くの２箇所のみしか鋼毛折損防止金具が設けられておらず，これら２つの鋼毛折損防止金具の間の鋼毛は根元部分が支持されないので、鋼毛の大部分は依然として折れやすいおそれがある。また、鋼毛折損防止金具が沿わせてある鋼毛も、２つ折とした鋼毛を角孔部に通して扇形片の半径方向に密接配置しているので、それらの鋼毛の根元部は、鋼毛の一本ずつが鋼毛折損防止金具で夫々補強されているに過ぎず、補強度合いが大きいとは言えない。
特許文献２では、束ねた鋼線の根元部分の腰を強くする目的の円筒状弾性部材を開示していない。
特許文献３は、予め鋼線ホルダーとしてユニット化しているので円盤への取り付けは容易であるが、ホルダーが３つの部材からなるなど構成が複雑である欠点がある。
この発明が解決しようとする課題は、清掃車用皿型ブラシの鋼線の腰をより強くして折れにくくし、密に配置できる簡易な構成の鋼線の取付構造を提供するものである。
【０００５】
【課題を解決するための手段】
上記課題解決のため、本願では、鋼線保持円盤を、円周方向に複数個に分割した扇形片から構成し、各扇形片に厚さ方向に沿って下方に向くにつれて半径方向外側に広がるように鋼線を取り付けてなる清掃車用皿型ブラシにおいて、前記各扇形片には、前記厚さ方向下方に向かうにつれて半径方向外側に傾斜する円形取付孔を、皿型ブラシの回転中心に対して同芯状で複数列設け，各取付孔列の取付孔は偶数個であって扇形片の円周方向中心線に対して左右対称に形成され、それらの取付孔は円周方向で隣り合って対になる取付孔間の円周方向ピッチが各取付孔列において全て同一となるように設けてあり、各取付孔に円筒状弾性部材を挿入してその円筒状弾性部材の下部が取付孔から下方に突出するようにし、隣り合って対になる取付孔に挿入した２つの円筒状弾性部材には、中間部で２つ折にした平鋼線を複数本重ねて跨らせるように挿通させたことを特徴とする。これによれば、全ての取付孔において、平鋼線が厚さ方向で重ねらることにより根元部分の強度が高められている上に，その根元部部分に嵌め込まれた円筒状弾性部材によって根元部分が更に支持されるため、全ての平鋼線について回転による路面からの抵抗に効果的に対抗できて平鋼線の根元部分の折れが長期に亘って防止できる。また、取付孔は、隣り合って対になる孔相互の円周方向ピッチが全て同じであるので、対になった取付孔に嵌め込まれる２つ折にして重ねる平鋼線は寸法、形状をほぼ統一できる。
【０００６】
各扇形片の上面には前記取付孔を形成した部分に窪み部を設け、その窪み部に平鋼線の２つ折り部分が収容されて扇形片の上面から上方に突出しないようにし、複数の扇形片の上面に塞ぎ円板を接合して窪み部を塞いで成る。窪みに平鋼線の２つ折り部分を収容させたので、塞ぎ板の扇形片上面への取り付け面を平坦にでき、塞ぎ板が単純な形状となり、簡易な構成につながる。
扇形片には、塞ぎ円板とボルトで結合される結合部分が設けてあり，その結合部分を除いて，前記各取付孔列で隣り合って対になる取付孔対の間で隣り合っている取付孔のピッチを、対になっている取付孔間のピッチと等しくまたは略等しくしてある。これによれば、対になる取付孔ピッチを小さくすることで，平鋼線が密に配置できる。
扇形片の円周方向端面と、その端面に最も近い位置に設けられる取付孔とのピッチは、各取付孔列において、対になる取付孔間ピッチの略１／２である。これによれば、分割されて隣り合う扇形片の端面部分においても、平鋼線の取付ピッチが対になる取付孔間のピッチとほぼ等しくなり，平鋼線が密に配置できる。
【０００７】
【発明の実施の形態】
実施の形態について図面を参照して説明する。図1には空気還流式の路面清掃車１を示す。周知のように，側ブラシとしての皿型ブラシ２は、車両側方に張り出して路面Ｆに接地され、略垂直軸線回りに回転されて、路肩の塵埃を車両幅方向中央方向に掃き出し、車両中央方向に掃きだされた塵埃は，ピックアップヘッド３内でブロア４からの圧空により路面から吹き上げられて吸い込みダクト５を介して車両後部に配置されたごみホッパ６に回収されるようになっている。路面清掃車の形式はこれに限らず，主ブラシでエレベータを介して塵埃をホッパに掃き上げる形式のものでも、その他の形式のものでもよい。
【０００８】
皿型ブラシ２について説明する。皿型ブラシ２は、鋼線保持円盤１０と、その鋼線保持円盤１０の上面に固着される塞ぎ円板１１とを備えている。鋼線保持円盤１０は、円周方向に複数個に分割した扇形片１２から構成される。図２に、鋼線保持円盤１０の平面図を示し，ここでは、扇形片１２は、円周方向に４分割されている。図３には、そのうちのひとつを示すが，残りの扇形片１２も全く同じである。扇形片１２は、半径方向の内側縁部１３と外側縁部１４の間が厚さ方向で窪んだ窪み部１５となっている。窪み部１５には、円周方向の両端面１６から一定角度位置にボス１７が設けてあり，図５に示すように，そのボス１７の裏面側にはナット１８が埋設されて、塞ぎ円板１１との結合部分を構成している。扇形片１２の内側縁部１３，外側縁部１４、ボス１７の上面は、塞ぎ円板１１が接合する接合面１９となっている。
【０００９】
図３，図６に示すように，前記窪み部１５分には、厚さ方向(上下方向)を下方に向かうにつれて半径方向外側に傾斜する円形の取付孔２０が、皿型ブラシ２の回転中心Ｃに対して同芯状に、異なる半径（ｒ１、ｒ２、ｒ３、ｒ４、ｒ５、ｒ６）上に夫々複数個設けてある。各取付孔列２１〜２６において、取付孔２０は偶数個設けてあり、それらの取付孔２０は、扇形片１２の円周方向中心線ＣＬに対して線対称に形成され、それらの取付孔２０は、端面１６に最も近い取付孔２０から２個づつが対になっており、その円周方向で隣り合って対になっている取付孔２０間の円周方向ピッチＬが各取付孔列２１〜２６において全て同一となるように設けてある。半径ｒ３、ｒ４、ｒ５で形成されている取付孔列２３〜２５は、前記ボス１７の存在により，列が円周方向に分断されている。
【００１０】
各取付孔列２１〜２６において、塞ぎ円板１１との結合部分を除いて，取付孔対とその隣の取付孔対の間で隣り合っている取付孔２０間（図３では、理解しやすいように取付孔２０ａ，２０ｂとした）のピッチは、対となる取付孔２０間の前記ピッチＬと等しく（ほぼ等しくでもよい）になるように設定されている。また、各取付孔列２１〜２６においては、扇形片１２の円周方向端面１６と、その端面１６に最も近い位置に設けられる取付孔２０とのピッチは、対になる取付孔２０間ピッチＬの略１／２に設定してある。
こうした配置関係は，たとえば以下のように設定されると実現される。即ち，半径ｒ１を最大の取付孔列２１が明けられる半径とし、その半径ｒ１のピッチ円上に形成される隣り合う取付孔２０間のピッチを全てピッチＬとし、半径ｒ１のピッチ円上に開けられる取付孔２０の総数をｎとしたとき、
半径ｒ２＝ｒ１（ｎ−２）／ｎ、半径ｒ３＝ｒ１（ｎ−４）／ｎ、半径ｒ４＝ｒ１（ｎ−６）／ｎ、半径ｒ５＝ｒ１（ｎ−８）／ｎ、半径ｒ６＝ｒ１（ｎ−１０）／ｎの各式に従って、取付孔列２２〜２６の形成されるピッチ円半径を設定し、半径ｒ２〜ｒ６のピッチ円上に、ボス１７が存在しないとした場合において、半径ｒ１での取付孔２０の個数から順に２個ずつ少ない取付孔２０を形成すればよい。
【００１１】
図４、７に示すように，各扇形片１２の各取付孔２０には、その下部が扇形片１２の下面より下方に所定長さ突出するように円筒状弾性部材３４が挿入される。円筒状弾性部材３４は、所定幅の弾性帯板をらせん状に巻いて中空形状（さや状）としたものである。円筒状弾性部材３４は、取付孔２０にしっくりと嵌まり込む外径を有している。上端は巻かれずに残されており、取付孔２０に嵌め込んだ時に下方に抜け落ちないための引掛部３５となっている。所定幅の平鋼線３１が長手の中間部で２つ折にされ，円周方向で隣り合って対になる取付孔２０に挿入された隣り合う２つの円筒状弾性部材３４に跨るように８本づつ、厚さ方向に重ねられて円筒状弾性部材３４の中空孔に挿入される（図８）。２つ折り部分３２から伸びる平鋼線３１の直線部３３の根元部分外周は夫々円筒状弾性部材３４内側に位置する。複数本の平鋼線３１を厚さ方向で重ねて隣り合う２つの円筒状弾性部材３４に跨るように挿入した状態においては、全ての平鋼線３１の面が円周方向に向く。
【００１２】
こうして隣り合って対になる取付孔２０に嵌め込まれて対になった円筒状弾性部材３４、３４に２つ折にした複数の平鋼線３１を跨らせて挿入すると、円筒状弾性部材３４の上端部と平鋼線３１の２つ折り部分３２とは、窪み部１５に配置，収容される。４つの扇形片１２に対して，円筒状弾性部材３４と平鋼線３１とを差し込んで、上側から塞ぎ円板１１で塞ぎ、ボルト４０をボス１７背面のナット１８に締結して皿型ブラシ２が完成する。その塞ぎ円板１１に駆動モータで回転される駆動軸が一体固着され、車両下方で側ブラシとして機能することになる。
【００１３】
側ブラシとしてほぼ垂直な軸線回りに回転されると、その回転による路面からの抵抗で平鋼線３１は回転方向と反対側に撓み、直線部３３の根元部分も撓もうとするが，その根元部分は平鋼線３１が複数本（８本）、厚さ方向に重ねてあることで根元部分自体の弾性強度が増しており，しかも、その根元部分は、各取付孔２０に挿入した円筒状弾性部材３４により支えられて更に補強された状態で撓むので、根元部分が折れる事態を長期に亘って回避できる。また、全ての取付孔２０において、嵌め込まれた円筒状弾性部材３４によってその中に挿入された平鋼線３１の根元部分が支持されているため、全ての平鋼線３１について根元部分の折れが防止できる。また、取付孔３０は、隣り合って対になる孔相互の円周方向ピッチＬが全て同じであるので、対になった取付孔３０に嵌め込まれる２つ折にして重ねる平鋼線３１は寸法、形状を統一できる。平鋼線３１は、弾性を有する材質で構成されるものであるから、重ねられる８本の平鋼線３１を全く同一寸法，形状で製作しておいても、対になる円筒状弾性部材３４に重ねて跨らせていった場合には、容易に変形して図７の状態に問題なく組み付けできる。また、平鋼線３１を対になる円筒状弾性部材３４，３４に跨るように挿入する作業だけで、平鋼線３１の平らな面が全て円周方向に揃うため、側ブラシとして回転されたときに、路面に対してその清掃能力が高くなる。
【００１４】
【発明の効果】
以上のように本願では、全ての取付孔に円筒状弾性部材を介して平鋼線を重ねて挿入するようにしたので、取付孔のピッチを小さくして平鋼線を密に配置しても全ての平鋼線の根元部分が弾性的に強化できて、路面からの回転抵抗に充分対抗できて根元部分の折れを防止でき、ブラシ寿命を長くできる。また、平鋼線の平らな面が取付状態では全て円周方向に揃うため，側ブラシとして回転させたときに路面に対する清掃効果が高い。
扇型片の窪み部に平鋼線の２つ折り部分を収容させたので、塞ぎ板の保持盤上面への取り付け面を平坦にでき、塞ぎ板を単純な平板にできて安価かつ構成容易になる。
また、各取付孔列で隣り合って対になる取付孔対の間で隣り合っている取付孔のピッチを、対になっている取付孔間のピッチと略等しくするようにしたため、対になる取付孔間ピッチを小さくすることで，鋼毛が密に配置でき、路面に対する清掃作用が効果的に行ない得る皿型ブラシとなるなどの効果がある。
【図面の簡単な説明】
【図１】路面清掃車を示す図である。
【図２】平鋼線と円筒状弾性部材を省略した状態の鋼線保持円盤と塞ぎ円板とを結合した平面図である。
【図３】扇形片を示す平面図である。
【図４】平鋼線と円筒状弾性部材を取付孔に差し込んだ状態を示す扇形片の一部拡大平面図である。
【図５】塞ぎ円板で塞いだ状態の、図４のＶ−Ｖ線断面図である。
【図６】塞ぎ円板で塞いだ状態の、図４のＶＩ−ＶＩ線断面図である。
【図７】取付孔に円筒状弾性部材と平鋼線を挿入した状態の縦断面図である。
【図８】図７のＶＩＩＩ−ＶＩＩＩ線断面図である。
【符号の説明】
１路面清掃車
２皿型ブラシ
１０鋼線保持円盤
１１塞ぎ円板
１２扇形片
１５窪み部
１６扇形片の円周方向端面
１７ボス(結合部分)
２０取付孔
２１〜２６取付孔列
３１平鋼線
３２２つ折り部分
３３直線部
３４円筒状弾性部材
４０ボルト
Ｃ皿型ブラシの回転中心
ＣＬ扇形片の円周方向中心線
Ｌ対となる取付孔間の円周方向ピッチ[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a dish-type brush (side brush) for a road sweeper.
[0002]
[Prior art]
In Patent Document 1, a steel wire holding disk is composed of sector pieces divided into four pieces in the circumferential direction, and steel hairs are inserted into each sector piece so as to incline radially outward as it goes downward along the thickness direction. Steel bristle breakage prevention metal fittings that provide a slot and fold the bristle into the square hole part and insert it closely in the radial direction, and prevent breakage of the base part of the bristle between the bristle slots Is arranged. Although the thing of patent document 2 is not the dish-type brush for garbage trucks, it is a circular brush which folded the bundled steel wire into two and fitted the resin pipe in the root part. This resin pipe is for preventing damage when a steel wire is attached to a disk with a wire. In Patent Document 3, a number of steel wires are bent and held in a steel wire holder to form a unit, and the unit is attached to a disk.
[0003]
[Patent Document 1]
Japanese Utility Model Publication No. 1-11044 [Patent Document 2]
Japanese Utility Model Publication No. 57-12909 [Patent Document 3]
US Pat. No. 3,678,530 gazette
[Problems to be solved by the invention]
In patent document 1, when the steel hair breakage prevention metal fitting is arrange | positioned in all between steel hair insertion groove holes, the space | interval of adjacent steel hair insertion groove holes will become wide, and many clearance gaps exist between steel hairs in the circumferential direction. Therefore, the cleaning action on the road surface is not effectively performed. For this reason, in the embodiment shown in Patent Document 1, the steel hair breakage prevention fitting is provided only in two places near the circumferential end surfaces of one sector piece, and these two steel hair breakage prevention fittings are provided. Since the base part of the bristle is not supported, most of the bristle may still be easily broken. In addition, the steel bristle along which the steel bristle breakage prevention metal fittings are placed is also closely arranged in the radial direction of the fan-shaped piece by passing the folded bristle through the square hole part. Each of the steel hairs is merely reinforced by the steel hair breakage prevention metal fittings, and it cannot be said that the degree of reinforcement is large.
Patent Document 2 does not disclose a cylindrical elastic member for the purpose of strengthening the waist of the root portion of the bundled steel wire.
Since Patent Document 3 is unitized as a steel wire holder in advance, it is easy to attach to a disk, but there is a drawback that the configuration is complicated, for example, the holder consists of three members.
The problem to be solved by the present invention is to provide a steel wire mounting structure with a simple structure that can be placed densely by making the steel wire of a dish-type brush for a cleaning vehicle stronger and less likely to break.
[0005]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, in the present application, the steel wire holding disk is composed of a sector piece divided into a plurality of pieces in the circumferential direction, and each sector piece extends outward in the radial direction as it faces downward along the thickness direction. In the dish-shaped brush for a cleaning car, in which a steel wire is attached to each of the fan-shaped pieces, each fan-shaped piece has a circular mounting hole that is inclined radially outward as it goes downward in the thickness direction with respect to the center of rotation of the dish-shaped brush. A plurality of concentric cores are provided, and each mounting hole row has an even number of mounting holes and is formed symmetrically with respect to the circumferential center line of the fan-shaped piece. The mounting holes are adjacent in the circumferential direction. The circumferential pitch between the pair of mounting holes is set to be the same in each mounting hole row, and a cylindrical elastic member is inserted into each mounting hole, and the lower part of the cylindrical elastic member extends from the mounting hole. It protrudes downward and is attached to a pair of mounting holes adjacent to each other. Two cylindrical elastic member Type is characterized in that is inserted so as to span the flat steel wire which is folded in two at the middle portion a plurality of overlaid. According to this, in all the mounting holes, the strength of the root portion is increased by overlapping the flat steel wires in the thickness direction, and the root is supported by the cylindrical elastic member fitted in the root portion. Since the portion is further supported, the resistance from the road surface due to the rotation can be effectively counteracted for all the flat steel wires, and the bending of the base portion of the flat steel wires can be prevented over a long period of time. In addition, since the mounting holes have the same circumferential pitch between adjacent pairs of holes, the flat steel wires that are folded in two and fitted into the paired mounting holes have almost the same size and shape. it can.
[0006]
The upper surface of each fan-shaped piece is provided with a hollow portion in the portion where the mounting hole is formed, and a folded portion of the flat steel wire is accommodated in the hollow portion so that it does not protrude upward from the upper surface of the fan-shaped piece. A block disk is joined to the upper surface of the piece to close the recess. Since the folded portion of the flat steel wire is accommodated in the recess, the mounting surface of the closing plate to the upper surface of the fan-shaped piece can be flattened, and the closing plate has a simple shape, which leads to a simple configuration.
The fan-shaped piece is provided with a connecting portion to be connected to the closing disk and the bolt, and except for the connecting portion, the mounting holes are adjacent to each other in pairs of the mounting holes. The pitch of the mounting holes is equal to or substantially equal to the pitch between the paired mounting holes. According to this, flat steel wires can be densely arranged by reducing the pair of mounting hole pitches.
The pitch between the circumferential end surface of the fan-shaped piece and the mounting hole provided at the position closest to the end surface is approximately ½ of the paired mounting hole pitch in each mounting hole row. According to this, even in the end face portions of the divided sector pieces adjacent to each other, the mounting pitch of the flat steel wires is substantially equal to the pitch between the mounting holes, and the flat steel wires can be arranged densely.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments will be described with reference to the drawings. FIG. 1 shows an air reflux type road cleaning vehicle 1. As is well known, the dish-shaped brush 2 serving as a side brush projects to the side of the vehicle and is grounded to the road surface F, rotated about a substantially vertical axis, and sweeps out dust on the shoulder of the road toward the center in the vehicle width direction. The dust swept away in the direction is blown up from the road surface by the pressure air from the blower 4 in the pickup head 3 and is collected by the garbage hopper 6 disposed at the rear of the vehicle via the suction duct 5. The type of the road sweeper is not limited to this, and may be a type that sweeps up dust to the hopper via an elevator with a main brush, or another type.
[0008]
The dish-shaped brush 2 will be described. The dish-shaped brush 2 includes a steel wire holding disk 10 and a closing disk 11 fixed to the upper surface of the steel wire holding disk 10. The steel wire holding disk 10 includes a sector piece 12 divided into a plurality of pieces in the circumferential direction. FIG. 2 shows a plan view of the steel wire retaining disk 10, where the sectoral piece 12 is divided into four in the circumferential direction. FIG. 3 shows one of them, and the remaining fan-shaped piece 12 is exactly the same. The fan-shaped piece 12 is a recess 15 that is recessed in the thickness direction between the inner edge 13 and the outer edge 14 in the radial direction. A boss 17 is provided in the recessed portion 15 at a certain angular position from both end faces 16 in the circumferential direction. As shown in FIG. 5, a nut 18 is embedded on the back side of the boss 17 to close the disk. 11 is formed. The upper surface of the inner edge 13, the outer edge 14, and the boss 17 of the sectoral piece 12 is a bonding surface 19 to which the closing disk 11 is bonded.
[0009]
As shown in FIG. 3 and FIG. 6, a circular mounting hole 20 that inclines radially outward as the thickness direction (vertical direction) goes downward is formed in the hollow portion 15. A plurality of concentric cores are provided on different radii (r1, r2, r3, r4, r5, r6). In each of the mounting hole rows 21 to 26, an even number of mounting holes 20 are provided, and these mounting holes 20 are formed symmetrically with respect to the circumferential center line CL of the sectoral piece 12. Are two pairs from the mounting holes 20 closest to the end face 16, and the circumferential pitch L between the mounting holes 20 adjacent to each other in the circumferential direction is set to each mounting hole row 21. -26 are all provided to be the same. The mounting hole rows 23 to 25 formed by the radii r3, r4, and r5 are divided in the circumferential direction by the presence of the bosses 17.
[0010]
In each of the mounting hole rows 21 to 26, except for the coupling portion with the closing disk 11, between the mounting hole pair adjacent to each other between the mounting hole pair and the adjacent mounting hole pair (in FIG. 3, it is easy to understand. Thus, the pitch of the mounting holes 20a and 20b is set to be equal to (or may be substantially equal to) the pitch L between the paired mounting holes 20. Further, in each of the mounting hole rows 21 to 26, the pitch between the circumferential end face 16 of the sector piece 12 and the mounting hole 20 provided at the position closest to the end face 16 is the pitch L between the mounting holes 20 as a pair. It is set to about 1/2 of.
Such an arrangement relationship is realized, for example, when set as follows. That is, the radius r1 is the radius at which the largest mounting hole row 21 is opened, the pitches between the adjacent mounting holes 20 formed on the pitch circle of the radius r1 are all pitches L, and the holes are opened on the pitch circle of the radius r1. When the total number of mounting holes 20 is n,
Radius r2 = r1 (n-2) / n, radius r3 = r1 (n-4) / n, radius r4 = r1 (n-6) / n, radius r5 = r1 (n-8) / n, radius r6 In the case where the pitch circle radius in which the mounting hole rows 22 to 26 are formed is set according to each equation of = r1 (n-10) / n, and the boss 17 is not present on the pitch circle having the radii r2 to r6 The number of mounting holes 20 that is smaller by two from the number of mounting holes 20 at the radius r1 may be formed in order.
[0011]
As shown in FIGS. 4 and 7, a cylindrical elastic member 34 is inserted into each mounting hole 20 of each sector piece 12 so that the lower part protrudes downward from the lower surface of the sector piece 12 by a predetermined length. The cylindrical elastic member 34 is formed in a hollow shape (sheath shape) by spirally winding an elastic strip having a predetermined width. The cylindrical elastic member 34 has an outer diameter that fits snugly into the mounting hole 20. The upper end is left unrolled and serves as a hooking portion 35 for preventing it from falling down when fitted into the mounting hole 20. Eight such that a flat steel wire 31 having a predetermined width is folded in two at the longitudinal middle portion and straddles two adjacent cylindrical elastic members 34 inserted into the mounting holes 20 adjacent to each other in the circumferential direction. One by one, it is stacked in the thickness direction and inserted into the hollow hole of the cylindrical elastic member 34 (FIG. 8). The outer periphery of the root portion of the straight portion 33 of the flat steel wire 31 extending from the folded portion 32 is positioned inside the cylindrical elastic member 34. In a state where a plurality of flat steel wires 31 are overlapped in the thickness direction and inserted so as to straddle two adjacent cylindrical elastic members 34, the surfaces of all the flat steel wires 31 face in the circumferential direction.
[0012]
When the plurality of flat steel wires 31 are inserted across the pair of cylindrical elastic members 34 and 34 that are fitted in the mounting holes 20 that are adjacent to each other in this manner, the cylindrical elastic members 34 The upper end portion and the folded portion 32 of the flat steel wire 31 are disposed and accommodated in the recess portion 15. The cylindrical elastic member 34 and the flat steel wire 31 are inserted into the four fan-shaped pieces 12, closed from the upper side and closed by the disk 11, and the bolt 40 is fastened to the nut 18 on the back surface of the boss 17, and the dish-shaped brush 2 Is completed. A drive shaft that is rotated by a drive motor is integrally fixed to the closing disc 11 and functions as a side brush below the vehicle.
[0013]
When rotated about a substantially vertical axis as a side brush, the flat steel wire 31 bends in the direction opposite to the rotation direction due to the resistance from the road surface due to the rotation, and the root portion of the straight portion 33 also tries to bend. The portion has a plurality of (8) flat steel wires 31 stacked in the thickness direction, whereby the elastic strength of the base portion itself is increased, and the base portion is a cylindrical shape inserted into each mounting hole 20. Since it bends in a state where it is supported and further reinforced by the elastic member 34, it is possible to avoid a situation in which the root portion is broken over a long period of time. In addition, in all the mounting holes 20, the root portions of the flat steel wires 31 inserted therein are supported by the fitted cylindrical elastic members 34, so that the root portions of all the flat steel wires 31 are bent. Can be prevented. Further, since the mounting holes 30 have the same circumferential pitch L between adjacent holes, the flat steel wire 31 that is folded in two and fitted into the paired mounting holes 30 has dimensions, The shape can be unified. Since the flat steel wire 31 is made of a material having elasticity, even if the eight flat steel wires 31 to be stacked are manufactured with exactly the same size and shape, a pair of cylindrical elastic members 34 are formed. 7 is easily deformed and can be assembled to the state of FIG. 7 without any problem. Moreover, since the flat surfaces of the flat steel wires 31 are all aligned in the circumferential direction only by inserting the flat steel wires 31 so as to straddle the pair of cylindrical elastic members 34, 34, they are rotated as side brushes. Sometimes the cleaning ability of the road becomes higher.
[0014]
【The invention's effect】
As described above, in this application, since flat steel wires are overlapped and inserted into all the mounting holes via the cylindrical elastic member, even if the flat steel wires are densely arranged by reducing the pitch of the mounting holes. The base part of all the flat steel wires can be elastically strengthened, can sufficiently resist the rotational resistance from the road surface, can prevent the root part from being bent, and can extend the brush life. Moreover, since the flat surfaces of the flat steel wires are all aligned in the circumferential direction in the mounted state, the cleaning effect on the road surface is high when rotated as a side brush.
Since the folded portion of the flat steel wire is accommodated in the recessed portion of the fan-shaped piece, the mounting surface of the closing plate to the upper surface of the holding plate can be flattened, and the closing plate can be made a simple flat plate, which is inexpensive and easy to configure. .
Further, the pitch of the mounting holes adjacent between the pair of mounting holes adjacent to each other in each mounting hole row is made substantially equal to the pitch between the paired mounting holes. By reducing the pitch between the mounting holes, the steel hairs can be densely arranged, and there is an effect that a dish-type brush that can effectively perform the cleaning action on the road surface is obtained.
[Brief description of the drawings]
FIG. 1 is a diagram showing a road sweeper.
FIG. 2 is a plan view in which a steel wire holding disk and a closing disk are combined with a flat steel wire and a cylindrical elastic member omitted.
FIG. 3 is a plan view showing a sector piece.
FIG. 4 is a partially enlarged plan view of a fan-shaped piece showing a state in which a flat steel wire and a cylindrical elastic member are inserted into an attachment hole.
5 is a cross-sectional view taken along the line VV in FIG. 4 in a state of being closed with a closing disc.
6 is a cross-sectional view taken along line VI-VI in FIG. 4 in a state of being closed with a closing disc.
FIG. 7 is a longitudinal sectional view of a state in which a cylindrical elastic member and a flat steel wire are inserted into the mounting hole.
8 is a cross-sectional view taken along line VIII-VIII in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Road surface cleaning car 2 Dish type brush 10 Steel wire holding disk 11 Blocking disk 12 Fan-shaped piece 15 Recessed part 16 Circumferential end surface 17 of fan-shaped piece Boss (joining part)
20 Mounting holes 21 to 26 Mounting hole row 31 Flat steel wire 32 Folded portion 33 Linear portion 34 Cylindrical elastic member 40 Bolt C Rotation center CL of the plate-shaped brush Between the circumferential center lines L of the fan-shaped pieces Circumferential pitch of

Claims

A cleaning car comprising a steel wire holding disk composed of sector pieces divided into a plurality of parts in the circumferential direction, and a steel wire attached to each sector piece so as to spread radially outward as it goes downward along the thickness direction. In the dish-type brush, each fan-shaped piece is provided with a plurality of rows of circular attachment holes that are inclined radially outward as it goes downward in the thickness direction, concentrically with respect to the center of rotation of the dish-type brush, An even number of mounting holes in the mounting hole row are formed symmetrically with respect to the center line in the circumferential direction of the fan-shaped piece, and the mounting holes are circumferential between adjacent mounting holes in the circumferential direction. Each mounting hole row is provided with the same direction pitch, and a cylindrical elastic member is inserted into each mounting hole so that the lower part of the cylindrical elastic member protrudes downward from the mounting hole. Two cylindrical elastic members inserted into mounting holes , Cleaning vehicles dish brush, characterized in that is inserted so as to span the flat steel wire which is folded in two at the middle portion a plurality of overlaid.

The upper surface of each fan-shaped piece is provided with a hollow portion in the portion where the mounting hole is formed, and a flat steel wire folded portion is accommodated in the hollow portion so as not to protrude upward from the upper surface of the fan-shaped piece. The dish-shaped brush for a cleaning vehicle according to claim 1, wherein a closed disk is joined to the upper surface of the piece to close the recess.

The fan-shaped piece is provided with a connecting portion that is connected to the closing disk by a bolt, and the mounting holes adjacent to each other in the mounting hole rows are adjacent to each other except for the connecting portion. The dish-type brush for a cleaning vehicle according to claim 2, wherein the pitch of the holes is equal to or substantially equal to the pitch between the paired mounting holes.

The pitch between the circumferential end face of the sectoral piece and the mounting hole provided at the position closest to the end face is approximately ½ of the paired mounting hole pitch in each mounting hole row. 4. A dish-shaped brush for a cleaning vehicle according to claim 3.