JP4030915B2

JP4030915B2 - Road surface cutting device

Info

Publication number: JP4030915B2
Application number: JP2003120636A
Authority: JP
Inventors: 哲男横山; 直樹高山
Original assignee: Hinode Ltd; Honko Manufacturing Co Ltd
Current assignee: Hinode Ltd; Honko Manufacturing Co Ltd
Priority date: 2003-04-24
Filing date: 2003-04-24
Publication date: 2008-01-09
Anticipated expiration: 2023-04-24
Also published as: JP2004324232A

Description

【０００１】
【発明の属する技術分野】
本発明は、マンホール等の周囲を円形に切断し得る路面切断装置に関するものである。
【０００２】
【従来の技術及び発明が解決しようとする課題】
例えば、道路工事の際に、路面を円形に切断するために使用される路面切断装置として、特許第３３７１２５４号に記載の路面切断装置がある。
【０００３】
この路面切断装置は、キャスターを設けた基体に駆動機を配設し、この駆動機の回動軸に断面円弧状回転刃（以下、単に回転刃という。）を連結して成るもので、具体的には、基体に前記駆動機を載置するためのフレームを設け、このフレームは、基体の一側部に設けた蝶番にアーム部材を介してスライド移動可能に設けると共に、前記蝶番により傾動自在に設け、このフレーム上に駆動機を載置し、フレーム下方に伝達ベルトにより駆動機と連結された回動軸を配設し、この回動軸の先端に回転刃を連結した構成となっている。
【０００４】
また、前記蝶番の配設位置は、回動軸の基端側の軸心線上に設定されている。
【０００５】
また、切断部位の中心点となる位置にはアンカーを打ち込み固定し、このアンカーと前記蝶番とを連結して、切断部位の中心点と基体とを連結し、これにより、基体が切断部位の中心点を中心として周回移動できるように構成している。
【０００６】
そして、回転刃が路面に接触しないように、予めフレームを所定角度上方に傾斜させた状態から、駆動機により回転刃を回動させつつフレームを徐々に水平方向となるように移動することで回転刃で路面を所定深さ切り込み、この状態でアンカー（切断部位の中心点）を中心に基体を周回移動させることで、路面を円形に切断することができる。
【０００７】
ところで、駆動機により回転する回転刃で切断できるのは、この断面円弧状の回転刃が描き得る球状に沿った方向のみとなる。
【０００８】
即ち、例えば、回転刃を、この回転刃が描き得る径の球状（円形）とは異なる径の球状（円形）で切断しようとすると、回転刃に無理な力がかかり、これにより、回転刃が湾曲したりしてきれいな円形に路面を切断できず、過度な負荷がかかれば円弧状刃が破損してしまう懸念も有する。
【０００９】
そのため、前述の路面切断装置は、アンカーを中心として回転刃の曲率で基体を水平方向に周回移動できるように構成する必要があると共に、アンカー上に設けた蝶番と同じ高さに回動軸を配設し、この蝶番を支点として上下方向に回動軸及び回転刃を起伏回動できる構成となっており、これにより、蝶番を回転刃の球心としてこの回転刃の曲率で周回移動及び起伏移動できるようになっている。
【００１０】
ところで、この路面切断装置では、路面を異なる径の円形で切断する場合には、前述の通り、この異なる径の円形（球状）を描き得る曲率の回転刃を回動軸に取り付けて路面を切断する必要がある。
【００１１】
ところが、前記基体は、蝶番を支点として周回移動及び起伏回動し得るように構成してあることから、新たに取り付けた回転刃が描き得る球状の球心と蝶番を一致させない限りは、回動軸に単に曲率が異なる円弧状刃を取り付けても、この円弧状刃が描く径で路面を円形に切断することはできない。
【００１２】
従って、前述の路面切断装置においては、路面を異なる径で円形に切断したい場合には、異なる曲率の回転刃が描き得る球の球心と蝶番とを一致させる必要がある。
【００１３】
そのため、例えば、より大きな径の円形（球状）を描き得る回転刃、即ち、曲率のより小さな回転刃で路面を切断したい場合には、蝶番に対してフレームを、回転刃の球心と蝶番とが合致する位置まで外方へ所定長さスライド移動させる作業が必要となる。
【００１４】
しかしながら、フレームには、前述のように、非常に重い駆動機や回動軸、円弧状刃等が配設されている。
【００１５】
従って、この非常に重いフレーム自体をスライド移動させることは非常に煩わしく、スムーズな作業を妨げる要因ともなっている。
【００１６】
本発明は、上記問題点を解決すべく鋭意検討・試作を繰り返して完成したもので、基体に設けられ路面の中心点に配設される中心位置決め部材に前記基体を連結し得る連結部に、複数の球面状ブレードの各々の球心と合致し得る連結係合部を複数設け、この連結係合部と中心位置決め部材とを連結して成る連設部と側方から見て略合致し得る位置に球面状ブレードを傾動作動し得る傾動機構を設け、この傾動機構は前記連結係合部と中心位置決め部材との連設部位に応じて位置変更し得るように構成することで、駆動部等を基体に対してスライド移動させることなく、路面を異なる径で円形に切断することができる極めて実用性に秀れた画期的な路面切断装置を提供することを目的としている。
【００１７】
【課題を解決するための手段】
添付図面を参照して本発明の要旨を説明する。
【００１８】
キャスター１を有する基体２に駆動部３を設け、この駆動部３の回動軸４に球面状ブレード５を連結し、この駆動部３によって前記球面状ブレード５を回転させて路面６を所定深さ切り込みつつ前記基体２を中心点Ｐを支点にして水平方向に周回移動することで前記路面６を円形に切断し得る路面切断装置であって、前記基体２に、前記路面６の前記円形に切断する部位の前記中心点Ｐに配設する中心位置決め部材７に連結し得る連結部８を設け、この連結部８には複数の連結係合部９を形成し、この複数の連結係合部９から選択した所定の連結係合部９と前記中心位置決め部材７の係合部10とを連設することで、前記路面６の中心点Ｐと合致する前記連結係合部９と前記係合部10との連設部11を支点に前記基体２を水平方向に周回移動し得るように構成すると共に、前記基体２には、少なくとも前記駆動部３，前記回動軸４及び前記球面状ブレード５を設置する設置体 13 と、この設置体 13 を基体２に対して傾動自在に連結する連結調整部材 14 と、前記設置体 13 と前記連結調整部材 14 とを基体２に対して傾動させる傾動手段Ｂとにより成る傾動機構Ａを備え、前記連結調整部材 14 と基体２との連結部位は側方から見て前記連結係合部９と前記係合部 10 との連設部 11 に略合致し得る位置に配設すると共に、前記回動軸４をこの回動軸４の軸心線上に前記連設部 11 が位置し得る位置に設置することで前記駆動部３，前記回動軸４及び前記球面状ブレード５を前記連設部11を支点として起伏回動し得るように構成し、前記回動軸４に異なる曲率の球面状ブレード５を取り替え自在に構成し、前記連結部８に設けた複数の連結係合部９の位置は、この異なる曲率の球面状ブレード５の球心位置に合致するように設定し、球面状ブレード５を取り替える際、この球面状ブレード５の球心にあたる部位の前記連結係合部９を選択してこの連結係合部９と前記係合部10とを連結すると共に、前記連結調整部材 14 と基体２との連結部位が側方から見て前記連結係合部９と前記係合部 10 との連設部 11 に略合致し得る位置に配設されるようにこの連結調整部材 14 と基体２との連結状態を変更調整することで、前記駆動部３，回動軸４及び球面状ブレード５を基体２に対して移動させることなく前記球面状ブレード５をこの球面状ブレード５が描く球状に沿う方向に前記連設部 11 を支点として起伏回動するように傾動調整し得るように前記傾動機構Ａを構成したことを特徴とする路面切断装置に係るものである。
【００１９】
また、前記連結調整部材14には、前記回動軸４に所定の曲率の球面状ブレード５を連結した際に、この球面状ブレード５が描く球状に沿う方向に前記球面状ブレード５を傾動し得るように前記設置体13を前記基体２に連結する第一連結部位15と、異なる曲率の球面状ブレード５を前記回動軸４に連結した際に、この異なる曲率の球面状ブレード５が描く球状に沿う方向に前記異なる曲率の球面状ブレード５を傾動し得るように前記設置体13を前記基体２に連結する第二連結部位16とを設け、前記回動軸４に連結する球面状ブレード５の曲率に応じて前記第一連結部位15若しくは前記第二連結部位16を選択し、この第一連結部位15若しくは第二連結部位16を介して前記設置体13を前記基体２に連結することで、前記回動軸４に連結した球面状ブレード５が描く球状の球心と前記連設部11を合致させ、この連設部11を支点として球面状ブレード５を起伏回動し得るように構成したことを特徴とする請求項１記載の路面切断装置に係るものである。
【００２０】
また、前記第一連結部位15と前記第二連結部位16とは、前記設置体13に対する前記連結調整部材14の取り付け向きを変えることで選択し得るように構成したことを特徴とする請求項２記載の路面切断装置に係るものである。
【００２１】
また、前記連結係合部９を連結係合孔９とし、前記係合部10を係合孔10としてこの連結係合孔９と係合孔10とを合致させ、この連結係合孔９と係合孔10に係合杆18を配設することで、前記基体２と前記中心位置決め部材７とを連結したことを特徴とする請求項１〜３のいずれか１項に記載の路面切断装置に係るものである。
【００２２】
また、前記基体２に、この基体２を移動させる際に握持する握持部17を設け、この握持部17の下方に前記連結部８を設けたことを特徴とする請求項１〜４のいずれか１項に記載の路面切断装置に係るものである。
【００２３】
【発明の実施の形態】
好適と考える本発明の実施の形態（発明をどのように実施するか）を、図面に基づいてその作用効果を示して簡単に説明する。
【００２４】
切断しようとする路面６に中心位置決め部材７を配設し中心点Ｐを設定する。
【００２５】
そして、連結部８に複数形成した連結係合部９のうち、回動軸４に連結した球面状ブレード５が描く球状の球心位置に略合致する連結係合部９と、路面６の中心点Ｐに配設された中心位置決め部材７の係合部10とを連結する。
【００２６】
これにより、球面状ブレード５は、連結部８の連結係合部９と中心位置決め部材７の係合部10との連設部11を支点として球面状ブレード５が描き得る球状に沿って水平方向に周回移動できることとなる。
【００２７】
この際、傾動機構Ａの作動により、連結係合部９と係合部10との連設部11を支点として少なくとも駆動部３，回動軸４と共に球面状ブレード５をこの球面状ブレード５が描き得る球状に沿う上下方向に起伏回動できることとなる。
【００２８】
即ち、傾動機構Ａにより、球面状ブレード５は、連結係合部９と係合部10との連設部11と略合致する部位を支点として起伏回動するため、球面状ブレード５はこの連設部11を支点としてこの球面状ブレード５が描き得る球状に沿う方向に移動できることとなる。
【００２９】
従って、例えば、回動軸４に連結した球面状ブレード５が路面６に接触しないように、予め球面状ブレード５を上方に傾斜させた状態とし、この状態で連結部８の連結係合部９に路面６に、路面６に設置した中心位置決め部材７の係合部10を連結し、駆動部３を駆動させて球面状ブレード５を回動させつつ、傾動機構Ａの作動により、回動軸４を水平方向に向けて傾動し、回動する球面状ブレード５により路面６を所定深さ切り込んだ状態で、前記連設部11を支点として基体２を水平方向に周回移動することで、路面６を中心点Ｐを中心に円形に切断することができる。
【００３０】
また、路面６を異なる径の円形（例えば、より大きい径の円形）に切断したい場合には、回動軸４に異なる曲率（即ち、小さい曲率）の球面状ブレード５を連結し、この小さい曲率の球面状ブレード５が描く球状の球心に略合致する連結係合部９を選択してこの連結係合部９を係合部10に連結することで、球面状ブレード５は、この球面状ブレード５が描き得る球状に沿う方向に水平回動できることとなる。
【００３１】
この際、傾動機構Ａは、連結係合部９と係合部10との連設部11と略合致する部位を支点として少なくとも駆動部３，回動軸４と共に球面状ブレード５を傾動し得るように変更調整できるため、これにより、異なる曲率の球面状ブレード５が描き得る球状に沿う方向に球面状ブレード５を起伏回動できることとなる。
【００３２】
従って、本発明は、回動軸４に異なる曲率の球面状ブレード５を連結して異なる径で円形に路面６を切断する際には、単に前記回動軸４に取り付ける球面状ブレード５の球心に略合致する連結係合部９を選択し、この選択した連結係合部９に中心位置決め部材７の係合部10を連結し、且つ、傾動機構Ａを、前記連設部11を支点に起伏回動し得るように傾動調整することで、従来のように、基体２に対して例えば駆動部３，回動軸４及び球面状ブレード５をスライド移動させるといった煩わしい作業を要せずに、路面６を異なる径で円形に簡単に切断することができる。
【００３３】
また、例えば、少なくとも前記駆動部３，前記回動軸４及び前記球面状ブレード５を設置する設置体13と、この設置体13を基体２に対して傾動自在に連結する連結調整部材14と、前記設置体13と前記連結調整部材14とを基体２に対して傾動させる傾動手段Ｂとにより前記傾動機構Ａを構成し、前記連結調整部材14と前記基体２との連結部位を、側方から見て前記連結係合部９と前記係合部10との連設部11に略合致し得る位置に配設すると共に、前記回動軸４を、この回動軸４の軸心線上に前記連設部11が位置し得る位置に設置した構成とすれば、連結調整部材14による設置体13と基体２との連結状態を変更調整することで、前記駆動部３，回動軸４及び球面状ブレード５（設置体13）を基体２に対して移動させる事なく、前記連設部11を支点に傾動できることとなるなど、一層実用的となる。
【００３４】
また、例えば、前記連結調整部材14には、前記回動軸４に所定の曲率の球面状ブレード５を連結した際に、この球面状ブレード５が描く球状に沿う方向に前記球面状ブレード５を傾動し得るように前記設置体13を前記基体２に連結する第一連結部位15と、異なる曲率の球面状ブレード５を前記回動軸４に連結した際に、この異なる曲率の球面状ブレード５が描く球状に沿う方向に前記異なる曲率の球面状ブレード５を傾動し得るように前記設置体13を前記基体２に連結する第二連結部位16とを設けた構成とすれば、前記回動軸４に連結する球面状ブレード５の曲率に応じて前記第一連結部位15若しくは前記第二連結部位16を選択して基体２に連結するだけで、回動軸４に連結した球面状ブレード５が描き得る球状に沿う方向に、連設部11を支点として球面状ブレード５を起伏回動できることとなるなど、一層実用的となる。
【００３５】
また、例えば、前記第一連結部位15と前記第二連結部位16とは、前記設置体13に対する前記連結調整部材14の取り付け向きを変えることで、前記基体２に連結可能に配設し得るように構成すれば、極めて簡単な操作で前記回動軸４に連結した球面状ブレード５が描く球状に沿う方向に球面状ブレード５を起伏回動できることとなるなど、一層実用的となる。
【００３６】
また、例えば、前記連結係合部９を連結係合孔９とし、前記係合部10を係合孔10としてこの連結係合孔９と係合孔10とを合致させ、この連結係合孔９と係合孔10に係合杆18を配設することで、前記基体２と前記中心位置決め部材７とを連結した構成とすれば、路面６に配設した中心位置決め部材７の係合孔10まで基体２を移動し、前記中心位置決め部材７の係合孔10と連結部８の連結係合孔９とを合致させて連通状態とし、この連通状態となった連結係合孔９と係合孔10とに係止杆18を挿入配設するだけの簡易な操作により、中心位置決め部材７と基体２とを連結できることとなるなど、一層実用的となる。
【００３７】
また、例えば、前記基体２に、この基体２を移動させる際に握持する握持部17を設け、この握持部17の下方に前記連結部８を設ければ、視認し易い足元で中心位置決め部材７と連結部８とを容易且つ確実に連結することができ、また、例えば、足元で中心位置決め部材７と連結部８とを連結若しくは取り外した後、立ち上がれば（体を起こせば）直ぐにまた握持部17を握持して基体２を移動でき、これにより、秀れた作業性を発揮できることとなるなど、一層実用的となる。
【００３８】
【実施例】
図面は本発明の一実施例を図示したものであり、以下に説明する。
【００３９】
本実施例は、キャスター１を有する基体２に駆動部３を設け、この駆動部３の回動軸４に球面状ブレード５を連結し、この駆動部３によって前記球面状ブレード５を回転させてマンホールの周囲の路面６を所定深さ切り込みつつ前記基体２を前記マンホールの中心点Ｐを支点にして水平方向に周回移動することで、マンホールの周囲の路面６を円形に切断し得る路面切断装置に係るものである。
【００４０】
即ち、基体２は、図１に示すように、平面視方形状の枠体２Ａから成り、この基体２の下部四隅部にキャスター１を設けた構成としている。
【００４１】
このキャスター１は、基体２に回動自在に設けられ、所定方向を向けた状態で方向規制し得るロック機構12を備えた構成としている。
【００４２】
また、基体２には、図６，図９に示すように、駆動部３となる原動機３を配設し、この原動機３の下方に回転軸４を配設し、この原動機３の回転部３Ａと回転軸４とを動力伝達ベルト20により連結することで、原動機３の動力により回転軸４を回動し得る構成とし、これにより、回動軸４に連結した球面状ブレード５を回動し得る構成としている。
【００４３】
また、回動軸４の先端部には、異なる曲率の球面状ブレード５（パラボラ形ブレード）を取り替え自在に構成している。
【００４４】
また、基体２の上部を構成する枠体２Ａには、図１，図２に示すように、基体２を移動させる際に握持する握持部17を、球面状ブレード５配設側とは逆の方向に突没自在に設けた構成としている。
【００４５】
前記基体２には、図２〜図４，図１０に示すように、前記路面６の円形に切断する部位の中心点Ｐに配設する中心位置決め部材７に連結し得る連結部８を設けた構成としている。
【００４６】
先ず、中心位置決め部材７について述べれば、中心位置決め部材７は、図３に示すように、円盤状の基板７Ａの中央に係合部10を配設した構成としている。
【００４７】
この係合部10は、係合孔10で構成している。
【００４８】
また、基板７Ａには、この基板７Ａを所定位置に設置固定するための固定板７Ｂを外方に向けて複数突設した構成としている。
【００４９】
そして、路面６の切断時には、この切断される路面６の中心に、前記係合部10を配設して中心点Ｐを設定する。
【００５０】
具体的には、本実施例では、マンホールの蓋30の中心位置に中心位置決め部材７の係合孔10が位置するように、前記中心位置決め部材７を配設している。
【００５１】
次に、連結部８について述べれば、連結部８は、基体２下部を構成する枠体２Ａに突片８Ａを設けることで構成されている。
【００５２】
また、連結部８は、前記握持部17の下方位置にあたる前記枠体２Ａに設けた構成としている。これにより、視認し易い足元で中心位置決め部材７と連結部８との連結作業を行うことができる。
【００５３】
具体的には、連結部８は、所定長さを有する板状の突片８Ａを前記枠体２Ａに設けた構成としている。
【００５４】
尚、本実施例では、図３に示すように、突片８Ａと枠体２Ａとの間に、この突片８Ａを支持する架設杆８Ｂを配設し、これにより、中心位置決め部材７に対して基体２を水平回動させた際の突片８Ａの耐荷重性を高めている。
【００５５】
また、連結部８には、前記中心位置決め部材７の係合部10に連結し得る複数の連結係合部９を形成している。
【００５６】
即ち、前記突片８Ａの長さ方向に所定間隔を置いて前記連結係合部９を複数形成した構成としている。
【００５７】
この突片８Ａにおける連結係合部９の形成位置は、図12に示すように、回動軸４に連結し得る種々の球面状ブレード５が描く各々の球状の球心位置に合致する位置としている。
【００５８】
連結係合部９は、係合孔９（以下、連結係合孔９という。）により形成した構成としている。
【００５９】
また、本実施例では、連結係合孔９を螺子孔としている。
【００６０】
本実施例では、連結部８の基端側及び先端側の二カ所に連結係合孔９を設けて、夫々異なる曲率の二種類の球面状ブレード５に対応できるように構成している。
【００６１】
前記複数の連結係合孔９のうち所定の連結係合孔９と、マンホールの蓋30の中心点Ｓ上に配設した係合孔10とを連結することで、この連結係合孔９と係合孔10との連設部11を支点に基体２を水平方向に周回移動し得るように構成している。
【００６２】
連結係合孔９と係合孔10との連結は、連結係合孔９と係合孔10とに係合杆18を配設することで行う構成としている。
【００６３】
具体的には、係合杆18として、頭部に操作部18Ａを設けた螺子杆18Ｂを採用し、この螺子杆18Ｂを連結係合孔９に螺入し、この連結係合孔９に螺入した螺子杆18Ｂの先端部を係合孔10に挿入係止することで、前記連結係合孔９と係合孔10とを連結した構成としている。
【００６４】
また、螺子杆18Ｂの先端部は、図３に示すように、係合孔10に対する螺子杆18Ｂ（基体２）の周回移動をスムーズにするために、球面状に形成すると良い。
【００６５】
これにより、基体２と中心位置決め部材７とは、連結係合孔９と係合孔10とに係止杆18を挿入係止するだけで連結することができる。
【００６６】
即ち、従来は、中央部に突出部を形成した中心位置決め部材を用い、この中央位置決め部材を切断部の中心部に配設し、前記突出部の近傍に、予め基体を傾斜させた状態の基体を位置させ、基体を水平方向に傾動させることで、基体に設けた係合孔に前記突出部を係合させてようやく中心位置決め部材と基体とを連結していた。
【００６７】
具体的に述べれば、従来の路面切断装置の基体には、基体を周回移動させるためのキャスターとは別に、基体を一側部を支点として傾動し得る傾動用キャスターを前記基体の他側部に設け、この傾動用キャスターを基体に対して下方に向けて突出させることで、基体の他側部を持ち上げ、この状態で（即ち、突出部に嵌合し得る係合孔が前記突出部よりも上方に位置した状態で）、基体を突出部近傍まで移動し、そして、傾動用キャスターを基体に対して没動させつつ突出部を係合部に嵌合し、これにより、中心位置決め部材と基体とを連結していた。
【００６８】
従って、中心位置決め部材と基体とを連結するために、基体自体を傾動動作させなければならないため手間がかり、しかも、突出部と係合部とを嵌合させる際には多少の位置ずれが生じることが多く、その場合には、再び傾動用キャスターを突出させて基体を傾動させ、うまく嵌合できる位置を探して再び傾動用キャスターを没動操作しなければならなかったり、この繰り返し作業が面倒な場合には、数人がかりで基体を持ち上げ（重量物であるため、一人で持ち上げるのはほとんど不可能と考えられる。）、前記多少の誤差を修正しなければならなかった。
【００６９】
この点、本実施例は、単に孔と孔とを合致させ、この合致した孔に杆を差し込むだけで、中心位置決め部材７と連結部８とを連結することができるため、従来に比して非常に作業性に秀れる。
【００７０】
螺子杆18Ｂには、この螺子杆18Ｂを連結係合孔９に螺入し係合孔10に挿入係止した際に、この連結係合孔９と操作部18Ａとの間に螺合され、螺子杆18Ｂの連結係合孔９に対する戻り回動を阻止し得る螺子杆固定体21が配設されている。
【００７１】
これにより、操作部18Ａを操作して連結係合孔９に螺子杆18Ｂを螺入し、この連結係合孔９を係合孔10に挿入係止した後、螺子杆固定体21により螺子杆18Ｂの戻り回動を阻止することで、螺子杆18Ｂを連結係合孔９の所定位置で固定することができ、よって、螺子杆18Ｂが連結係合孔９及び係合孔10に係合した状態を維持することができる。
【００７２】
基体２には、駆動部３，回動軸４及び球面状ブレード５を前記連設部11を支点に傾動し得る傾動機構Ａを設けた構成としている。
【００７３】
即ち、駆動機構Ａは、駆動部３，回動軸４及び球面状ブレード５を設置する設置体13と、この設置体13を基体２に対して傾動自在に連結する連結調整部材14と、この設置体13と連結調整部材14とを基体２に対して傾動作動させる傾動手段Ｂとにより構成している。
【００７４】
設置体13は、基体２下部の枠体２上に架設状態に配設される平面視方形状の板状体で形成した構成としている。尚、本実施例では、設置体13を板状体で形成した構成としたが、駆動部３，回動軸４及び球面状ブレード５を設置し得るものであれば適宜採用しても良く、例えば、駆動部３，回動軸４及び球面状ブレード５を設置する部位に支承杆を配設して成る枠状体を前記設置体13として採用しても良い。
【００７５】
具体的には、図４〜図６に示すように、設置体13上面部に原動機３を載置した構成としている。
【００７６】
また、設置体13の下面部には、回動軸４を回動自在に支持する支持部材22を設け、この支持部材22で回動軸４を支持することで、回動軸４を先端部を基体２から所定長さ突出した状態で、設置体13に回動自在に配設した構成としている。
【００７７】
具体的には、回動軸４は、図２に示すように、平面から見て前記複数の連結係合部９の形成方向に略合致する位置にあたる設置体13に設置した構成としている。
【００７８】
言い替えれば、図６，図９に示すように、回動軸４の軸心線上に連結係部９と係合部10との連設部11が位置し得る設置体13部位に前記回動軸４を設置した構成としている。
【００７９】
これにより、回動軸４の先端に連結した球面状ブレード５を前記連設部11を支点として水平回動し得るように構成している。
【００８０】
また、図５，図６に示すように、設置体13の上面部所定位置には、設置体13の上面から原動機３の回動部３Ａまでを被覆するカバー体23を設けた構成としている。
【００８１】
そして、このカバー体23を設けた設置体13の上面部に貫通部（図示省略）を設けて、この貫通部を介して原動機３の回動部３Ａと回動軸４とを動力伝達ベルト20によって連結した構成としている。
【００８２】
設置体13は、連結調整部材14により基体２に対して傾動可能に連結した構成としている。
【００８３】
即ち、連結調整部材14は、基体２の連結部８形成側と、この連結部８形成側と同じ側の設置体13の一側部とを連結することで、側面から見て基体２の一側部を支点として前記基体２に対して設置体13を傾動し得るように構成している。
【００８４】
また、連結調整部材14は、連結調整部材14と基体２との連結部位が、側方から見て前記連結係合部９と前記係合部10との連設部11に略合致し得る位置に配されるように、前記設置体13と基体２とを連結した構成としている。
【００８５】
これにより、設置体13は、側方から見て、回動軸４に連結した球面状ブレード５が描く球状の球心にあたる連結係合部９と係合部10との連設部11を支点として傾動することになり、よって、球面状ブレード５は、前記球心を支点に起伏回動することができる。
【００８６】
連結調整部材14には、前記回動軸４に所定の曲率の球面状ブレード５を連結した際に、この球面状ブレード５が描く球状に沿う方向に前記球面状ブレード５を傾動し得るように前記設置体13を前記基体２に連結する第一連結部位15と、異なる曲率の球面状ブレード５を前記回動軸４に連結した際に、この異なる曲率の球面状ブレード５が描く球状に沿う方向に前記異なる曲率の球面状ブレード５を傾動し得るように前記設置体13を前記基体２に連結する第二連結部位16とを設け、前記回動軸４に連結する球面状ブレード５の曲率に応じて前記第一連結部位15若しくは前記第二連結部位16を選択し、この第一連結部位15若しくは第二連結部位16を介して前記設置体13を前記基体２に連結することで、前記回動軸４に連結した球面状ブレード５が描く球状の球心と前記連設部11を合致させ、この連設部11を支点として球面状ブレード５を起伏回動し得るように構成している。
【００８７】
具体的には、連結調整部材14は、図４〜図６に示すように、側方から見て、設置体13に対して垂下方向に突出した第一連結板14Ａを設けてこの第一連結板14Ａの端部を前記第一連結部位15に設定し、また、設置体13に対して斜め上方に向けて突出する第二連結板14Ｂを設けてこの第二連結板14Ｂの端部を前記第二連結部位16に設定した構成としている。
【００８８】
また、連結調整部材14は、設置体13の前記一側部に付設される付設板14Ｃの両端部に前記第一連結板14Ａと前記第二連結板14Ｂとを夫々設けて形成した構成としている。
【００８９】
また、第一連結板14Ａの先端部には、連結ボルト26を挿通するための挿通孔27Ａを形成して前記第一連結部位15とし、第二連結板14Ｂの先端部には、後述する連結ボルト26を挿通するための挿通孔27Ｂを形成して前記第二連結部位16としている。
【００９０】
更に具体的には、本実施例では、平面視コ字状に連結調整部材14を形成し、この平面視コ字状に形成した連結調整部材14の開放部を外方に向けた状態で前記設置体13にボルトなどの固定手段により固定し、この連結調整部材14の両端部を、側方から見て垂下方向に突出する第一連結板14Ａと水平方向よりもやや上方に且つ第一連結板14Ａよりも長く突出する第二連結板14Ｂとにより形成した構成としている。
【００９１】
一方、基体２の下部を構成する枠体２Ａには、連結調整部材14を連結するための連結突出体25を設けた構成としている。
【００９２】
即ち、この連結突出体25に第一連結板14Ａ若しくは第二連結板14Ｂを連結することで基体２と連結調整部材14とを連結した構成としている。
【００９３】
具体的には、この連結突出体25は、図４〜図６に示すように、基体２の下部を構成する枠体２Ａに連結部８を介して左右二カ所に設けた構成としている。
【００９４】
更に具体的には、連結突出体25は、平面視コ字状の板状体で形成し、この板状体の開口部が外方へ向く状態で前記枠体２Ａに付設した構成としている。
【００９５】
また、連結突出体25の基端側及び先端側には、第一連結板14Ａ若しくは第二連結板14Ｂを前記連結突出体25に連結するための連結ボルト26を挿通するための挿通孔28を連通状態で設けた構成としている。
【００９６】
この挿通孔28の形成位置は、側方から見て連結係合孔９と係合孔10との連設部11に略合致し得る位置に設定している。
【００９７】
即ち、連結部８における連結係合部９の形成間隔と同じ間隔で、前記連結突出体25に前記挿通孔28を設けた構成としている。尚、本実施例では、連結突出体25の基端側と先端側との二カ所に挿通孔28を設けた構成としたが、この挿通孔28の数は必要に応じて適宜設計変更しても良い。
【００９８】
これにより、例えば、曲率の大きい（即ち、径が小さい円形に切断し得る）球面状ブレード５を回動軸４に連結した際には、連結部８の基端側に設けた連結係合孔９と中心位置決め部材７の係合孔10とを係合杆18で連結すると共に、この連結係合孔９と係合孔10との連設部11に側方から見て略合致する位置に形成された連結突出体25の挿通孔28と第一連結板14Ａの端部に設けた第一連結部位15となる挿通孔27とを連結することで、球面状ブレード５は、この球面状ブレード５が描く球状に沿う方向に水平回動及び起伏回動することができる（図１１，図１２参照）。
【００９９】
第一連結部位15と第二連結部位16とは、設置体13に対する連結調整部材14の取り付け向きを変えることで、基体２（連結突出体25）に連結可能に配設し得るように構成している。
【０１００】
即ち、本実施例では、設置体13に対する連結調整部材14の取り付け向きを１８０度逆さまに設定する度に、第一連結部位15若しくは第二連結部位16とを基体２に連結可能に配設し得るように、前記連結調整部材14に第一連結部材15と第二連結部材16とを形成した構成としている。
【０１０１】
具体的には、設置体13を水平状態とした際に第一連結板14Ａが垂下方向に向く状態で連結調整部材14を設置体13に付設した場合には、図４〜図６に示すように、連結部８の基端側に形成した連結係合孔９と中心位置決め部材７の係合孔10との連設部11に、側方から見て略合致し得る位置で第一連結部位15（挿通孔27Ａ）と連結突出体25の基端部に形成した挿通孔28Ａとを連結できるように構成している。
【０１０２】
一方、設置体13を水平状態とした際に連結調整部材14を設置体13に対して１８０度回転させて前記設置体13に連結し、第一連結板14Ａが真上方向に向いた状態とした場合には、図７〜図９に示すように、第二連結板14Ｂは設置体13に対して斜め下方に突出し、連結部８の先端側に形成した連結係合孔９と中心位置決め部材７の係合孔10との連設部11に、側方から見て略合致し得る位置で第二連結部位16（挿通孔28Ｂ）と連結突出体25の先端部に形成した挿通孔28Ｂとを連結できるように構成している。
【０１０３】
設置体13は、傾動手段Ｂを所定操作することにより、基体２に対して傾動する構成としている。
【０１０４】
傾動手段Ｂとしては、操作部31を回動操作することにより全体長が伸縮可変する伸縮機構を採用している。
【０１０５】
具体的には、傾動手段Ｂは、図１，図５に示すように、内部に螺子溝を形成した螺子筒体32と、この螺子筒体32に螺入し頭部に操作部31を形成した螺子杆33とで構成し、螺子筒体32に螺子杆33を螺入した状態で、螺子筒体32の先端部（即ち、螺子杆33挿入側とは逆側）を設置体13に固定し、螺子杆33の上部（即ち、操作部31形成側）を基体２の上部所定位置に連結した構成としている。
【０１０６】
そして、操作部31を一方向に回動させることで螺子杆33を螺子筒体32内に螺入し、これにより、設置体13を引き上げてこの設置体13を上方に向けて傾動できるように構成している。
【０１０７】
一方、操作部31を他方向に回動させることで螺子杆33を螺子筒体32から突出させ、これにより、上方に向けて所定角度傾斜した設置体13を水平方向に向けて傾動できるように構成している。
【０１０８】
基体２の球面状ブレード５配設側には、この球面状ブレード５を被覆するカバー体34を設けた構成としている。
【０１０９】
具体的には、本実施例では、図１，図５，図６に示すように、球面状ブレード５を全体的に被覆し得る形状，大きさに形成した構成としている。
【０１１０】
更に具体的には、このカバー体34は、球面状ブレード５が路面６に対して最大限上方に傾斜した状態から、路面６を切り込む状態までを十分に覆い得る形状，大きさに形成した構成としている。
【０１１１】
尚、図中符号35は、切削により生じる切削粉などが外部に飛び散ることを防止ゴム体である。
【０１１２】
回動軸４と球面状ブレード５との連結部近傍には、図５，図６に示すように、路面６を切断する際に摩擦により加熱する球面状ブレード５を冷却するための冷却水を放出する放出ノズル37を設けた構成としている。
【０１１３】
これにより、球面状ブレード５で路面６を切断しても、摩擦により球面状ブレード５が過熱状態となることを防止することができる。
【０１１４】
尚、図中符号38は、冷却水を貯める貯水タンクである。
【０１１５】
また、基体２には、図１に示すように、前記握持部17と交差し、この基体２の側部に突没自在に配設された握持部36を設けた構成としている。この握持部36を設けることで、中心点Ｐに対する基体２の周回移動を従来に比してよりスムーズに行うことができる。
【０１１６】
即ち、基体２を周回移動させる際に、図２に示すように、握持部17を握持して中心点Ｐを中心として基体２を周回移動させることもできるが、この握持部17と、この握持部17に交差し基体２の側部に配設した握持部36とを握持することで、基体２を周回方向により押動（若しくは引動）し易くなり、よって、従来に比して非常にスムーズに基体２を水平回動させて路面６を円形に切断できることとなる。例えば、図２に示す、基体２の側部に配設された握持部36近傍の握持部17ａを枠体２Ａ内に没入させ、残る握持部17・36を押動すると、基体２を非常にスムーズに周方向に動かすことができる。
【０１１７】
次に、本実施例の作用について述べる。
【０１１８】
先ず、マンホールの蓋30の周囲を小さい径の円形に切断する場合について述べる。
【０１１９】
設置体13に連結調整部材14を、第一連結板14Ａが垂下方向へ向く状態で付設し、この第一連結板14Ａの第一連結部位15となる挿通孔27Ａと、連結突出体25の基端側に形成した挿通孔28Ａとを連結ボルト26により連結する。
【０１２０】
そして、回動軸４に曲率の大きい球面状ブレード５を連結する。
【０１２１】
この際、回動軸４に連結した球面状ブレード５が接地してしまわないように、予め回動軸４（即ち、設置体13）を傾動手段Ｂにより、上方に向けて傾斜させておく。
【０１２２】
マンホール上に中心位置決め部材７を敷設し、中心点Ｓを設定する。
【０１２３】
球面状ブレード５が描く球状の球心に位置する連結係合孔９と、中心位置決め部材７の係合孔10とを合致させ、操作部18Ａを回動操作して螺子杆18Ｂを連結係合孔９に螺入して先端部を係合孔10内に挿入係止し、中心位置決め部材７と突片８Ａ（連結部８）とを連結する。
【０１２４】
原動機３を可動して球面状ブレード５を回動させ、傾動手段Ｂの操作部31を操作して球面状ブレード５を水平方向に傾動して路面６に接地し、更に所定深さ切り込む。
【０１２５】
この際、回動軸４と球面状ブレード５との連結部近傍の放出ノズルからは冷却水が放出され、摩擦熱によって球面状ブレード５か過熱状態となることを防止する。
【０１２６】
中心位置決め部材７の係合孔10と突片８Ａの連結係合孔９との連設部11を中心に、基体２を周回移動し、マンホールの蓋30の周囲の路面６を円形に切断する。
【０１２７】
この際、基体２のキャスター１は、四輪ともフリーな状態となっている。
【０１２８】
切断後は、傾動手段Ｂの操作部31を操作して球面状ブレード５を路面６から離脱させ、連結係合孔９と係合孔10との連結を解除して路面６の切断部位から基体２を移動する。
【０１２９】
次に、マンホールの蓋30の周囲を大きい径の円形に切断する場合について述べる。
【０１３０】
設置体13に連結調整部材14を、第一連結板14Ａが真上方向に向く状態で付設し、第二連結板14Ｂの第二連結部位16となる挿通孔27Ｂと、連結突出体25の先端側に形成した挿通孔28Ｂとを連結ボルト26により連結する。
【０１３１】
その余は、径の小さい円形に切断する場合と同じである。
【０１３２】
尚、本発明は、本実施例に限られるものではなく、各構成要件の具体的構成は適宜設計し得るものである。
【０１３３】
【発明の効果】
本発明は上述のように構成したから、基体に設けられ路面の中心点に配設される中心位置決め部材に前記基体を連結し得る連結部に、複数の球面状ブレードの各々の球心と合致し得る連結係合部を複数設け、この連結係合部と中心位置決め部材とを連結して成る連設部と側方から見て略合致し得る位置に球面状ブレードを傾動作動し得る傾動機構を設け、この傾動機構は前記連結係合部と中心位置決め部材との連設部位に応じて位置変更し得るように構成することで、駆動部等を基体に対してスライド移動させることなく、路面を異なる径で円形に切断することができる極めて実用性に秀れた画期的な路面切断装置となる。
【０１３４】
即ち、回動軸に異なる曲率の球面状ブレードを連結して異なる径で円形に路面を切断する際には、単に前記回動軸に取り付ける球面状ブレードの球心に略合致する連結係合部を選択し、この選択した連結係合部に中心位置決め部材の係合部を連結し、且つ、傾動機構を、前記連設部を支点に起伏回動し得るように傾動調整することで、従来のように、基体に対して例えば駆動部，回動軸及び球面状ブレードをスライド移動させるといった煩わしい作業を要せずに、路面を異なる径で円形に簡単に切断することができる極めて実用性，作業性に秀れた画期的な路面切断装置となる。
【０１３５】
また、連結調整部材による設置体と基体との連結状態を変更調整することで、前記駆動部，回動軸及び球面状ブレード（設置体）を基体に対して移動させる事なく、前記連設部を支点に傾動することができる極めて実用性，作業性に秀れた画期的な路面切断装置となる。
【０１３６】
また、請求項２記載の発明においては、前記回動軸に連結する球面状ブレードの曲率に応じて前記第一連結部位若しくは前記第二連結部位を選択して基体に連結するだけで、回動軸に連結した球面状ブレードが描き得る球状に沿う方向に、連設部を支点として球面状ブレードを起伏回動することができる極めて実用性に秀れた画期的な路面切断装置となる。
【０１３７】
また、請求項３記載の発明においては、極めて簡単な操作で前記回動軸に連結した球面状ブレードが描く球状に沿う方向に球面状ブレードを起伏回動することができる極めて作業性に秀れた画期的な路面切断装置となる。
【０１３８】
また、請求項４記載の発明においては、路面に配設した中心位置決め部材の係合孔まで基体を移動し、前記中心位置決め部材の係合孔と連結部の連結係合孔とを合致させて連通状態とし、この連通状態となった連結係合孔と係合孔とに係止杆を挿入配設するだけの簡易な操作により、中心位置決め部材と基体とを連結することができる極めて作業性に秀れた画期的な路面切断装置となる。
【０１３９】
また、請求項５記載の発明においては、視認し易い足元で中心位置決め部材と連結部とを容易且つ確実に連結することができ、また、例えば、足元で中心位置決め部材と連結部とを連結若しくは取り外した後、立ち上がれば（体を起こせば）直ぐにまた握持部を握持して基体を移動でき、これにより、秀れた作業性を発揮することができる極めて実用的な路面切断装置となる。
【図面の簡単な説明】
【図１】本実施例の全体斜視図である。
【図２】本実施例の使用状態を示す説明平面図である。
【図３】本実施例の基体と中心位置決め部材との連設部を示す拡大説明斜視図である。
【図４】本実施例の回動軸に曲率の大きい球面状ブレードを取り付けた際の設置体と基体との連結状態を示す説明斜視図である。
【図５】本実施例の曲率の大きい球面状ブレードを上方に傾斜した状態を示す説明側断面図である。
【図６】本実施例の曲率の大きい球面状ブレードで路面を所定深さ切り込んだ状態を示す説明側断面図である。
【図７】本実施例の回動軸に曲率の小さい球面状ブレードを取り付けた際の設置体と基体との連結状態を示す説明斜視図である。
【図８】本実施例の曲率の小さい球面状ブレードを上方に傾斜した状態を示す説明側断面図である。
【図９】本実施例の曲率の小さい球面状ブレードで路面を所定深さ切り込んだ状態を示す説明側断面図である。
【図１０】本実施例の連設部を中心とする基体の周回移動を示す説明平面図である。
【図１１】本実施例の異なる曲率の球面状ブレードが描く球状を示す説明平面図である。
【図１２】本実施例の異なる曲率の球面状ブレードが描く球状を示す説明側断面図である。
【符号の説明】
１キャスター
２基体
３駆動部
４回動軸
５球面状ブレード
６路面
７中心位置決め部材
８連結部
９連結係合部
10 係合部
11 連設部
13 設置体
14 連結調整部材
15 第一連結部位
16 第二連結部位
17 握持部
18 係合杆
Ａ傾動機構
Ｂ傾動手段
Ｐ中心点[0001]
BACKGROUND OF THE INVENTION
 The present invention relates to a road surface cutting device capable of cutting a periphery of a manhole or the like into a circle.
[0002]
[Prior art and problems to be solved by the invention]
 For example, there is a road surface cutting device described in Japanese Patent No. 3371254 as a road surface cutting device used for cutting a road surface into a circle during road construction.
[0003]
 This road surface cutting device is configured by disposing a driving machine on a base provided with casters, and connecting a rotary blade (hereinafter simply referred to as a rotary blade) to a rotation shaft of the driving machine. Specifically, a frame for mounting the drive unit is provided on the base, and this frame is provided on a hinge provided on one side of the base so as to be slidable via an arm member and can be tilted by the hinge. And a rotating shaft connected to the driving device by a transmission belt is disposed below the frame, and a rotary blade is connected to the tip of the rotating shaft. Yes.
[0004]
 Moreover, the arrangement position of the hinge is set on the axial center line on the proximal end side of the rotation shaft.
[0005]
 In addition, an anchor is driven and fixed at a position that becomes the center point of the cutting site, the anchor and the hinge are connected, and the center point of the cutting site and the base are connected, whereby the base is the center of the cutting site. It is configured to be able to move around the point.
[0006]
 Then, the rotating blade is rotated by moving the frame gradually in the horizontal direction while rotating the rotating blade from the state where the frame is previously tilted upward by a predetermined angle so that the rotating blade does not contact the road surface. The road surface can be cut into a circular shape by cutting the road surface with a blade to a predetermined depth and moving the base member around the anchor (center point of the cutting site) in this state.
[0007]
 By the way, what can be cut by a rotary blade rotated by a driving machine is only in a direction along a spherical shape that can be drawn by the rotary blade having an arcuate cross section.
[0008]
 That is, for example, if the rotary blade is cut with a spherical shape (circular shape) different from the spherical shape (circular shape) that can be drawn by the rotary blade, an excessive force is applied to the rotary blade. There is also a concern that the arcuate blade may be damaged if an excessive load is applied because the road surface cannot be cut into a beautiful circle due to bending.
[0009]
 For this reason, the above-described road surface cutting device needs to be configured so that the base body can be moved in the horizontal direction around the anchor with the curvature of the rotary blade, and the rotation shaft is set at the same height as the hinge provided on the anchor. The rotating shaft and the rotary blade can be rotated up and down with the hinge as a fulcrum. It can be moved.
[0010]
 By the way, in this road surface cutting device, when cutting a road surface with a circle having a different diameter, as described above, a rotary blade having a curvature capable of drawing a circle (spherical) with a different diameter is attached to a rotating shaft to cut the road surface. There is a need to.
[0011]
 However, since the base is configured to be able to move around and swing around the hinge as a fulcrum, the base rotates as long as the spherical ball center that can be drawn by the newly attached rotary blade does not coincide with the hinge. Even if an arcuate blade having a different curvature is attached to the shaft, the road surface cannot be cut into a circle with a diameter drawn by the arcuate blade.
[0012]
 Therefore, in the above-described road surface cutting device, when it is desired to cut the road surface into a circular shape with different diameters, it is necessary to match the spherical center of the sphere that can be drawn by the rotary blades having different curvatures with the hinge.
[0013]
 Therefore, for example, when it is desired to cut the road surface with a rotary blade capable of drawing a circle (spherical shape) having a larger diameter, that is, a rotary blade with a smaller curvature, the frame is attached to the hinge, the ball center of the rotary blade and the hinge. It is necessary to carry out a slide movement for a predetermined length to the position where the two coincide with each other.
[0014]
 However, as described above, a very heavy drive, a rotating shaft, an arcuate blade, and the like are disposed on the frame.
[0015]
 Therefore, it is very troublesome to slide the very heavy frame itself, and this is a factor that hinders smooth work.
[0016]
 The present invention has been completed by repeating intensive studies and trial manufactures to solve the above problems, and in the connecting portion that can be connected to the center positioning member provided at the center point of the road surface provided on the base body, A plurality of connecting engagement portions that can match the respective spherical centers of the plurality of spherical blades are provided, and can be substantially matched with a connecting portion formed by connecting the connecting engaging portion and the center positioning member when viewed from the side. A tilting mechanism capable of tilting and moving the spherical blade is provided at a position, and this tilting mechanism is configured so that the position of the spherical blade can be changed in accordance with the connection portion between the connection engaging portion and the center positioning member, thereby driving the drive unit, etc. It is an object of the present invention to provide a revolutionary road surface cutting device that is extremely practical and capable of cutting a road surface into a circular shape with a different diameter without sliding the base plate with respect to the base.
[0017]
[Means for Solving the Problems]
 The gist of the present invention will be described with reference to the accompanying drawings.
[0018]
 A drive unit 3 is provided on a base body 2 having casters 1, and a spherical blade 5 is connected to a rotation shaft 4 of the drive unit 3, and the spherical blade 5 is rotated by the drive unit 3 so that a road surface 6 has a predetermined depth. A road surface cutting device capable of cutting the road surface 6 into a circle by moving the base body 2 around the center point P in a horizontal direction while cutting into a circular shape. A connecting portion 8 that can be connected to the center positioning member 7 disposed at the center point P of the part to be cut is provided, and a plurality of connecting engaging portions 9 are formed in the connecting portion 8, and the plurality of connecting engaging portions. By connecting a predetermined coupling engagement portion 9 selected from 9 and an engagement portion 10 of the center positioning member 7, the coupling engagement portion 9 and the engagement that coincide with the center point P of the road surface 6 are provided. The base 2 can be moved in the horizontal direction around the connecting portion 11 with the portion 10 as a fulcrum. Together constituting urchin, the base 2, at least the drive unit 3, the rotating shaft 4 and the spherical blade 5Installation body to install 13 And this installation body 13 Connection adjusting member for tilting the base 2 with respect to the base 2 14 And the installation body 13 And the connection adjusting member 14 And a tilting mechanism A composed of tilting means B for tilting the base plate 2 with respect to the base body 2, and the connection adjusting member 14 The connecting portion between the base 2 and the connecting portion 9 and the engaging portion are viewed from the side. Ten And connected part 11 The rotating shaft 4 is disposed on a center line of the rotating shaft 4 and is arranged at a position that can substantially match the rotating shaft 4. 11 By installing the drive unit 3, the rotating shaft 4 and the spherical blade 5 at a position where can be locatedThe connecting portion 11 is configured to be able to swing up and down with the fulcrum 11 as a fulcrum, the spherical shaft 5 having a different curvature is configured to be replaceable on the rotating shaft 4, and a plurality of connecting engagements provided in the connecting portion 8 The position of the portion 9 is set so as to match the spherical center position of the spherical blade 5 having a different curvature, and when the spherical blade 5 is replaced, the connecting engagement portion at the portion corresponding to the spherical center of the spherical blade 5 is used. Select 9TheThe connection engaging portion 9 and the engagement portion 10 are connected.And the connection adjusting member 14 The connecting portion between the base 2 and the connecting portion 9 and the engaging portion as viewed from the side. Ten And connected part 11 This connection adjustment member is arranged at a position that can substantially match 14 By changing and adjusting the connection state between the base 2 and the base body 2,Without moving the drive unit 3, the rotating shaft 4 and the spherical blade 5 with respect to the base 2The spherically arranged blade 5 is arranged in a direction along the spherical shape drawn by the spherical blade 5. 11 Undulating and turning aroundThe tilting mechanism A is configured so that tilting can be adjusted, and the present invention relates to a road surface cutting device.
[0019]
 Further, when the spherical blade 5 having a predetermined curvature is connected to the rotation shaft 4, the spherical blade 5 is tilted in the connection adjusting member 14 in a direction along the spherical shape drawn by the spherical blade 5. When connecting the first connecting portion 15 for connecting the installation body 13 to the base body 2 and the spherical blade 5 having a different curvature to the rotating shaft 4, the spherical blade 5 having a different curvature is drawn. A spherical blade that is connected to the rotary shaft 4 by providing a second connecting portion 16 that connects the installation body 13 to the base body 2 so that the spherical blade 5 having a different curvature can be tilted in a direction along a spherical shape. The first connecting portion 15 or the second connecting portion 16 is selected according to the curvature of 5, and the installation body 13 is connected to the base body 2 through the first connecting portion 15 or the second connecting portion 16. The spherical blade connected to the rotating shaft 4 Claims draw the connecting portion 11 and the spherical center of the spherical is matched, characterized by being configured the connecting portion 11 so as to undulating pivoting a spherical blade 5 as a fulcrum1This relates to the described road surface cutting device.
[0020]
 The first connection part 15 and the second connection part 16 may be selected by changing the mounting direction of the connection adjusting member 14 with respect to the installation body 13.2This relates to the described road surface cutting device.
[0021]
 In addition, the coupling engagement portion 9 is used as a coupling engagement hole 9 and the engagement portion 10 is used as an engagement hole 10 so that the coupling engagement hole 9 and the engagement hole 10 are matched. The base 2 and the center positioning member 7 are connected by disposing an engagement rod 18 in the engagement hole 10.1-3The road surface cutting device according to any one of the above.
[0022]
 Further, the base body 2 is provided with a gripping portion 17 for gripping when the base body 2 is moved, and the connecting portion 8 is provided below the gripping portion 17.1-4The road surface cutting device according to any one of the above.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
 An embodiment of the present invention (how to carry out the invention) considered to be suitable will be briefly described with reference to the drawings, showing its effects.
[0024]
 A center positioning member 7 is disposed on the road surface 6 to be cut and a center point P is set.
[0025]
 Of the plurality of coupling engagement portions 9 formed in the coupling portion 8, the coupling engagement portion 9 that substantially matches the spherical spherical center position drawn by the spherical blade 5 coupled to the rotating shaft 4, and the center of the road surface 6. The engaging portion 10 of the center positioning member 7 disposed at the point P is connected.
[0026]
 Thereby, the spherical blade 5 is horizontally aligned along the spherical shape that the spherical blade 5 can draw with the connecting portion 11 of the coupling engaging portion 9 of the coupling portion 8 and the engaging portion 10 of the center positioning member 7 as a fulcrum. It will be possible to move around.
[0027]
 At this time, due to the operation of the tilting mechanism A, the spherical blade 5 is connected to the spherical blade 5 together with at least the drive unit 3 and the rotation shaft 4 with the connecting portion 11 of the coupling engaging portion 9 and the engaging portion 10 as a fulcrum. It will be possible to turn up and down in the vertical direction along a spherical shape that can be drawn.
[0028]
 That is, since the spherical blade 5 is raised and lowered by the tilting mechanism A, with the portion that substantially matches the connecting portion 11 of the connecting and engaging portion 9 and the engaging portion 10 as a fulcrum, the spherical blade 5 is rotated. It can move in the direction along the spherical shape that can be drawn by the spherical blade 5 with the installation portion 11 as a fulcrum.
[0029]
 Therefore, for example, the spherical blade 5 is inclined in advance so that the spherical blade 5 connected to the rotating shaft 4 does not contact the road surface 6, and in this state, the connection engagement portion 9 of the connection portion 8 is provided. Further, the engaging portion 10 of the center positioning member 7 installed on the road surface 6 is connected to the road surface 6, the driving portion 3 is driven to rotate the spherical blade 5, and the rotation mechanism A is operated to rotate the rotating shaft. 4 is tilted toward the horizontal direction and the road surface 6 is cut by a predetermined depth by the rotating spherical blade 5, and the base body 2 is moved around the horizontal direction around the connecting portion 11 as a fulcrum. 6 can be cut into a circle around the center point P.
[0030]
 Further, when it is desired to cut the road surface 6 into a circle having a different diameter (for example, a circle having a larger diameter), a spherical blade 5 having a different curvature (that is, a small curvature) is connected to the rotating shaft 4, and this small curvature is obtained. The spherical blade 5 is formed into the spherical shape by selecting the coupling engagement portion 9 that substantially matches the spherical spherical center drawn by the spherical blade 5 and coupling the coupling engagement portion 9 to the engagement portion 10. It can be horizontally rotated in the direction along the spherical shape that the blade 5 can draw.
[0031]
 At this time, the tilting mechanism A can tilt the spherical blade 5 together with at least the drive unit 3 and the rotating shaft 4 with a portion that substantially matches the connecting portion 11 of the coupling engaging portion 9 and the engaging portion 10 as a fulcrum. Therefore, the spherical blade 5 can be swung up and down in a direction along a spherical shape that can be drawn by the spherical blade 5 having different curvatures.
[0032]
 Therefore, in the present invention, when the spherical blade 5 having different curvatures is connected to the rotating shaft 4 and the road surface 6 is cut into a circular shape with different diameters, the spherical blade 5 is simply attached to the rotating shaft 4. A connection engagement portion 9 that substantially matches the center is selected, the engagement portion 10 of the center positioning member 7 is connected to the selected connection engagement portion 9, and the tilting mechanism A is connected to the connection portion 11 as a fulcrum. By adjusting the tilt so that it can be swung up and down, it is troublesome to slide, for example, the drive unit 3, the rotation shaft 4 and the spherical blade 5 with respect to the base body 2 as in the prior art.NoThe road surface 6 can be easily cut into circles with different diameters without requiring work.
[0033]
 Further, for example, an installation body 13 for installing at least the drive unit 3, the rotating shaft 4 and the spherical blade 5, and a connection adjusting member 14 for connecting the installation body 13 to the base 2 so as to be tiltable. The tilting mechanism A is constituted by the tilting means B that tilts the installation body 13 and the connection adjusting member 14 with respect to the base body 2, and a connection portion between the connection adjusting member 14 and the base body 2 is laterally formed. As seen from the above, the rotating shaft 4 is disposed on the axial center line of the rotating shaft 4 while being disposed at a position where the connecting engaging portion 9 and the engaging portion 10 can substantially coincide with the connecting portion 11. If it is set as the structure installed in the position where the connection part 11 can be located, by changing and adjusting the connection state of the installation body 13 and the base | substrate 2 by the connection adjustment member 14, the said drive part 3, the rotating shaft 4, and spherical surface Without moving the blade 5 (installation body 13) with respect to the base body 2, the connecting portion 11 can be tilted about the fulcrum. Such as the Rukoto, it becomes more practical.
[0034]
 Further, for example, when the spherical blade 5 having a predetermined curvature is connected to the rotation shaft 4, the spherical blade 5 is connected to the connection adjusting member 14 in a direction along the spherical shape drawn by the spherical blade 5. When the first connecting portion 15 for connecting the installation body 13 to the base body 2 and the spherical blade 5 having different curvatures are connected to the rotating shaft 4 so as to be tiltable, the spherical blades 5 having different curvatures are connected. If the second connecting portion 16 for connecting the installation body 13 to the base body 2 is provided so that the spherical blade 5 having the different curvature can be tilted in the direction along the spherical shape drawn by The spherical blade 5 connected to the rotating shaft 4 can be obtained simply by selecting the first connecting portion 15 or the second connecting portion 16 according to the curvature of the spherical blade 5 connected to the base member 2 and connecting it to the base body 2. In the direction along the spherical shape that can be drawn, the connecting part 11 is a fulcrum. Thus, the spherical blade 5 can be swung up and down, making it more practical.
[0035]
 Further, for example, the first connection part 15 and the second connection part 16 can be arranged so as to be connectable to the base body 2 by changing the mounting direction of the connection adjusting member 14 with respect to the installation body 13. With this configuration, the spherical blade 5 can be swung up and down in a direction along the spherical shape drawn by the spherical blade 5 connected to the rotating shaft 4 by an extremely simple operation, and thus it becomes more practical.
[0036]
 Further, for example, the connection engagement portion 9 is used as a connection engagement hole 9 and the engagement portion 10 is used as an engagement hole 10 so that the connection engagement hole 9 and the engagement hole 10 are matched. If the base 2 and the center positioning member 7 are connected by disposing the engagement rod 18 in the engagement hole 10 and the engagement hole 10, the engagement hole of the center positioning member 7 disposed on the road surface 6 can be obtained. The base body 2 is moved to 10, and the engagement hole 10 of the center positioning member 7 and the connection engagement hole 9 of the connection portion 8 are brought into communication with each other so as to be in communication with the connection engagement hole 9 in the communication state. The center positioning member 7 and the base body 2 can be connected by a simple operation of simply inserting and disposing the locking rod 18 into the joint hole 10, and so on.
[0037]
 Further, for example, if the base 2 is provided with a gripping portion 17 that is gripped when the base 2 is moved and the connecting portion 8 is provided below the gripping portion 17, the base 2 is easily visible at the center. The positioning member 7 and the connecting portion 8 can be easily and reliably connected. For example, after the center positioning member 7 and the connecting portion 8 are connected or removed at the foot, immediately after standing up (when the body is raised) In addition, the gripping portion 17 can be gripped to move the base body 2, which makes it possible to exhibit excellent workability, and is more practical.
[0038]
【Example】
 The drawings illustrate one embodiment of the present invention and are described below.
[0039]
 In this embodiment, a drive unit 3 is provided on a base 2 having casters 1, a spherical blade 5 is connected to a rotation shaft 4 of the drive unit 3, and the spherical blade 5 is rotated by the drive unit 3. A road surface cutting device capable of cutting the road surface 6 around the manhole into a circle by moving the base 2 around the manhole in the horizontal direction while cutting the road surface 6 around the manhole at a predetermined depth. It is related to.
[0040]
 That is, as shown in FIG. 1, the base 2 is composed of a frame body 2 A having a planar view shape, and the casters 1 are provided at the lower four corners of the base 2.
[0041]
 The caster 1 is provided with a lock mechanism 12 that is rotatably provided on the base 2 and can regulate the direction in a state in which the predetermined direction is directed.
[0042]
 Further, as shown in FIG. 6 and FIG. 9, the base body 2 is provided with a prime mover 3 serving as a drive unit 3, a rotary shaft 4 is provided below the prime mover 3, and a rotary part 3 A of the prime mover 3. And the rotating shaft 4 are connected by a power transmission belt 20 so that the rotating shaft 4 can be rotated by the power of the prime mover 3, thereby rotating the spherical blade 5 connected to the rotating shaft 4. The structure is to get.
[0043]
 Further, a spherical blade 5 (parabolic blade) having a different curvature is configured to be replaceable at the tip of the rotating shaft 4.
[0044]
 Further, as shown in FIGS. 1 and 2, the frame 2 A constituting the upper portion of the base 2 has a gripping portion 17 that is gripped when the base 2 is moved. The structure is provided so as to be freely retractable in the opposite direction.
[0045]
 As shown in FIGS. 2 to 4 and 10, the base body 2 is provided with a connecting portion 8 that can be connected to a center positioning member 7 disposed at a center point P of a portion of the road surface 6 cut into a circle. It is configured.
[0046]
 First, the center positioning member 7 will be described. As shown in FIG. 3, the center positioning member 7 has a configuration in which an engaging portion 10 is disposed at the center of a disc-shaped substrate 7A.
[0047]
 The engaging portion 10 is constituted by an engaging hole 10.
[0048]
 Further, the substrate 7A has a structure in which a plurality of fixing plates 7B for fixing the substrate 7A at a predetermined position are provided protruding outward.
[0049]
 When the road surface 6 is cut, the engaging portion 10 is arranged at the center of the road surface 6 to be cut to set the center point P.
[0050]
 Specifically, in this embodiment, the center positioning member 7 is disposed so that the engagement hole 10 of the center positioning member 7 is positioned at the center position of the lid 30 of the manhole.
[0051]
 Next, the connecting part 8 will be described. The connecting part 8 is configured by providing a projecting piece 8A on the frame 2A constituting the lower part of the base 2.
[0052]
 Further, the connecting portion 8 is configured to be provided on the frame body 2 A corresponding to the lower position of the gripping portion 17. Thereby, the connection operation | work with the center positioning member 7 and the connection part 8 can be performed with the leg | foot which is easy to visually recognize.
[0053]
 Specifically, the connecting portion 8 has a configuration in which a plate-like protruding piece 8A having a predetermined length is provided on the frame body 2A.
[0054]
 In this embodiment, as shown in FIG. 3, an erection rod 8B that supports the projecting piece 8A is disposed between the projecting piece 8A and the frame body 2A. Thus, the load resistance of the protruding piece 8A when the base body 2 is horizontally rotated is enhanced.
[0055]
 The connecting portion 8 is formed with a plurality of connecting and engaging portions 9 that can be connected to the engaging portion 10 of the center positioning member 7.
[0056]
 That is, a plurality of the coupling engagement portions 9 are formed at a predetermined interval in the length direction of the protruding piece 8A.
[0057]
 As shown in FIG. 12, the formation position of the connecting engagement portion 9 in the projecting piece 8 A is a position that coincides with each spherical spherical center position drawn by various spherical blades 5 that can be connected to the rotating shaft 4. Yes.
[0058]
 The connection engagement portion 9 is formed by an engagement hole 9 (hereinafter referred to as connection engagement hole 9).
[0059]
 In the present embodiment, the coupling engagement hole 9 is a screw hole.
[0060]
 In this embodiment, connection engagement holes 9 are provided at two locations on the base end side and the tip end side of the connection portion 8 so as to correspond to two types of spherical blades 5 having different curvatures.
[0061]
 By connecting a predetermined coupling engagement hole 9 among the plurality of coupling engagement holes 9 and an engagement hole 10 disposed on the center point S of the lid 30 of the manhole, The base body 2 is configured to be able to move in the horizontal direction around the connecting portion 11 with the engagement hole 10 as a fulcrum.
[0062]
 The coupling engagement hole 9 and the engagement hole 10 are coupled by disposing an engagement rod 18 in the coupling engagement hole 9 and the engagement hole 10.
[0063]
 Specifically, a screw rod 18B provided with an operating portion 18A on the head is adopted as the engagement rod 18, and this screw rod 18B is screwed into the connection engagement hole 9, and screwed into the connection engagement hole 9. The connection engagement hole 9 and the engagement hole 10 are connected by inserting and locking the distal end portion of the inserted screw rod 18B into the engagement hole 10.
[0064]
 Further, as shown in FIG. 3, the tip of the screw rod 18B is preferably formed in a spherical shape in order to smoothly move the screw rod 18B (base 2) with respect to the engagement hole 10.
[0065]
 As a result, the base 2 and the center positioning member 7 can be connected to each other by simply inserting and locking the locking rod 18 into the coupling engagement hole 9 and the engagement hole 10.
[0066]
 In other words, conventionally, a center positioning member having a protrusion at the center is used, the center positioning member is disposed at the center of the cutting portion, and the base is inclined in advance near the protrusion. The center positioning member and the base body are finally connected by engaging the protrusion with the engaging hole provided in the base body by tilting the base body in the horizontal direction.
[0067]
 Specifically, in the base of the conventional road surface cutting device, apart from the caster for revolving the base, a tilting caster capable of tilting with the base as a fulcrum is provided on the other side of the base. The tilting caster protrudes downward with respect to the base, thereby lifting the other side of the base. In this state (that is, the engagement hole that can be fitted to the protrusion is more than the protrusion. The base is moved to the vicinity of the protrusion, and the protrusion is fitted to the engagement part while the tilting caster is slid with respect to the base. And connected.
[0068]
 Therefore, in order to connect the center positioning member and the base body, the base body itself must be tilted, which is troublesome, and there is a slight positional shift when the projecting part and the engaging part are fitted. In that case, it is necessary to project the tilting caster again to tilt the base body, find the position where it can be fitted well, and then move the tilting caster down again. In some cases, the base must be lifted by several persons (it is considered impossible to lift by itself because it is a heavy object), and the slight error must be corrected.
[0069]
 In this regard, in this embodiment, the center positioning member 7 and the connecting portion 8 can be connected by simply matching the holes and inserting a flange into the matched holes. Excellent workability.
[0070]
 The screw rod 18B is screwed between the connection engagement hole 9 and the operation portion 18A when the screw rod 18B is screwed into the connection engagement hole 9 and inserted into and locked in the engagement hole 10. A screw rod fixing body 21 capable of preventing the screw rod 18B from returning and rotating with respect to the coupling engagement hole 9 is provided.
[0071]
 As a result, the operating portion 18A is operated to screw the screw rod 18B into the connection engagement hole 9, and the connection engagement hole 9 is inserted and locked into the engagement hole 10, and then the screw rod fixing body 21 is used to By preventing the return rotation of 18B, the screw rod 18B can be fixed at a predetermined position of the connection engagement hole 9, so that the screw rod 18B is engaged with the connection engagement hole 9 and the engagement hole 10. The state can be maintained.
[0072]
 The base 2 is provided with a tilting mechanism A capable of tilting the drive unit 3, the rotation shaft 4 and the spherical blade 5 with the connecting unit 11 as a fulcrum.
[0073]
 That is, the drive mechanism A includes an installation body 13 for installing the drive unit 3, the rotation shaft 4 and the spherical blade 5, a connection adjusting member 14 for connecting the installation body 13 to the base 2 in a tiltable manner, The installation body 13 and the connection adjusting member 14 are configured by tilting means B that tilts and moves the base body 2.
[0074]
 The installation body 13 is configured to be formed of a plate-like body having a planar view shape disposed in a erected state on the frame body 2 below the base body 2. In this embodiment, the installation body 13 is formed of a plate-like body. However, the installation body 13 may be appropriately adopted as long as the drive unit 3, the rotation shaft 4 and the spherical blade 5 can be installed. For example, a frame-like body in which a support rod is disposed at a portion where the drive unit 3, the rotation shaft 4 and the spherical blade 5 are installed may be adopted as the installation body 13.
[0075]
 Specifically, as shown in FIGS. 4 to 6, the motor 3 is placed on the upper surface of the installation body 13.
[0076]
 Further, a support member 22 that rotatably supports the rotation shaft 4 is provided on the lower surface portion of the installation body 13, and the rotation shaft 4 is supported by the support member 22 so that the rotation shaft 4 is attached to the tip portion. In a state of protruding from the base body 2 by a predetermined length, the installation body 13 is rotatably arranged.
[0077]
 Specifically, as shown in FIG. 2, the rotation shaft 4 is configured to be installed on an installation body 13 that corresponds to the formation direction of the plurality of coupling engagement portions 9 when viewed from above.
[0078]
 In other words, as shown in FIG. 6 and FIG. 9, the rotation shaft is located at the installation body 13 site where the connection portion 11 of the connection engagement portion 9 and the engagement portion 10 can be located on the axis of the rotation shaft 4. 4 is installed.
[0079]
 Thus, the spherical blade 5 connected to the tip of the rotating shaft 4 is configured to be horizontally rotatable with the connecting portion 11 as a fulcrum.
[0080]
 As shown in FIGS. 5 and 6, a cover body 23 is provided at a predetermined position on the upper surface of the installation body 13 so as to cover the upper surface of the installation body 13 to the rotating portion 3 A of the prime mover 3.
[0081]
 Then, a through portion (not shown) is provided on the upper surface portion of the installation body 13 provided with the cover body 23, and the power transmission belt 20 connects the rotating portion 3A and the rotating shaft 4 of the prime mover 3 through the through portion. It is set as the structure connected by.
[0082]
 The installation body 13 is configured to be tiltably connected to the base body 2 by a connection adjusting member 14.
[0083]
 In other words, the connection adjusting member 14 connects one side of the base body 2 when viewed from the side surface by connecting the side of the base 2 where the connection part 8 is formed and one side of the installation body 13 on the same side as the side of the connection part 8. The installation body 13 can be tilted with respect to the base 2 with the side portion as a fulcrum.
[0084]
 Further, the connection adjusting member 14 has a position where the connection portion between the connection adjusting member 14 and the base 2 can substantially match the connecting portion 11 between the connection engaging portion 9 and the engagement portion 10 when viewed from the side. The installation body 13 and the base body 2 are connected to each other so as to be disposed in the middle.
[0085]
 As a result, the installation body 13 is provided with a connecting portion 11 between the connecting engagement portion 9 and the engaging portion 10 corresponding to a spherical spherical center drawn by the spherical blade 5 connected to the rotating shaft 4 when viewed from the side. Therefore, the spherical blade 5 can rotate up and down around the spherical center.
[0086]
 When the spherical blade 5 having a predetermined curvature is connected to the rotation shaft 4, the spherical blade 5 can be tilted to the connection adjusting member 14 in a direction along the spherical shape drawn by the spherical blade 5. When the first connecting portion 15 for connecting the installation body 13 to the base body 2 and the spherical blade 5 having a different curvature are connected to the rotating shaft 4, the spherical blade 5 having a different curvature follows the spherical shape drawn by the spherical blade 5. A second connecting portion 16 for connecting the installation body 13 to the base body 2 is provided so that the spherical blades 5 having different curvatures can be tilted in directions, and the curvature of the spherical blade 5 connected to the rotating shaft 4 is provided. The first connection part 15 or the second connection part 16 is selected according to the above, and the installation body 13 is connected to the base body 2 via the first connection part 15 or the second connection part 16. Ball drawn by spherical blade 5 connected to rotating shaft 4 The spherical center is matched to the connecting portion 11 constitute the connecting portion 11 so as to undulating pivoting a spherical blade 5 as a fulcrum.
[0087]
 Specifically, as shown in FIGS. 4 to 6, the connection adjusting member 14 is provided with a first connection plate 14 A that protrudes in the hanging direction with respect to the installation body 13 when viewed from the side, and this first connection. An end portion of the plate 14A is set as the first connection portion 15, and a second connection plate 14B protruding obliquely upward with respect to the installation body 13 is provided, and the end portion of the second connection plate 14B is set as the end portion. The configuration is set to the second connecting portion 16.
[0088]
 Further, the connection adjusting member 14 has a configuration in which the first connection plate 14A and the second connection plate 14B are provided at both ends of the attachment plate 14C attached to the one side portion of the installation body 13, respectively. .
[0089]
 Further, an insertion hole 27A for inserting the connection bolt 26 is formed at the distal end portion of the first connection plate 14A to form the first connection portion 15, and the connection portion described later is connected to the distal end portion of the second connection plate 14B. An insertion hole 27 B for inserting the bolt 26 is formed as the second connection portion 16.
[0090]
 More specifically, in the present embodiment, the connection adjustment member 14 is formed in a U shape in plan view, and the open portion of the connection adjustment member 14 formed in the U shape in plan view is directed outward. The fixing member 13 is fixed to the installation body 13 by a fixing means such as a bolt, and both end portions of the connection adjusting member 14 are slightly above the horizontal direction and the first connection plate 14A projecting in the hanging direction when viewed from the side. The second connecting plate 14B protrudes longer than the plate 14A.
[0091]
 On the other hand, the frame 2A constituting the lower part of the base body 2 is provided with a connection protrusion 25 for connecting the connection adjustment member 14.
[0092]
 That is, the base 2 and the connection adjustment member 14 are connected by connecting the first connection plate 14A or the second connection plate 14B to the connection protrusion 25.
[0093]
 Specifically, as shown in FIGS. 4 to 6, the connecting protrusions 25 are configured to be provided at two positions on the left and right sides of the frame body 2 A constituting the lower portion of the base 2 via the connecting portions 8.
[0094]
 More specifically, the connecting projecting body 25 is formed of a U-shaped plate-like body in plan view, and is attached to the frame 2A with the opening of the plate-like body facing outward.
[0095]
 Further, on the proximal end side and the distal end side of the connecting protrusion 25, there are inserted holes 28 for inserting the connecting bolts 26 for connecting the first connecting plate 14A or the second connecting plate 14B to the connecting protrusion 25. It is set as the structure provided in the communication state.
[0096]
 The formation position of the insertion hole 28 is set to a position that can substantially match the connecting portion 11 of the connection engagement hole 9 and the engagement hole 10 when viewed from the side.
[0097]
 That is, the insertion protrusions 25 are provided in the connection protrusions 25 at the same intervals as the formation intervals of the connection engagement portions 9 in the connection portions 8. In this embodiment, the insertion holes 28 are provided at two locations on the proximal end side and the distal end side of the connecting protrusion 25. However, the number of the insertion holes 28 may be appropriately changed as necessary. Also good.
[0098]
 Thereby, for example, when the spherical blade 5 having a large curvature (that can be cut into a circle having a small diameter) is connected to the rotating shaft 4, a connecting engagement hole provided on the base end side of the connecting portion 8. 9 and the engaging hole 10 of the center positioning member 7 are connected by an engaging rod 18, and the connecting portion 11 of the connecting engaging hole 9 and the engaging hole 10 is substantially aligned with the connecting portion 11 when viewed from the side. By connecting the insertion hole 28 of the formed connecting protrusion 25 and the insertion hole 27 serving as the first connecting portion 15 provided at the end of the first connecting plate 14A, the spherical blade 5 is formed into the spherical blade. 5 can be horizontally rotated and undulated and rotated in the direction along the sphere drawn by the reference numeral 5 (see FIGS. 11 and 12).
[0099]
 The first connection part 15 and the second connection part 16 are configured so as to be connectable to the base body 2 (connection protrusion 25) by changing the mounting direction of the connection adjusting member 14 with respect to the installation body 13. ing.
[0100]
 That is, in the present embodiment, the first connecting portion 15 or the second connecting portion 16 is disposed so as to be connectable to the base body 2 every time the mounting direction of the connection adjusting member 14 with respect to the installation body 13 is set 180 degrees upside down. obtainLikeIn addition, the first adjustment member 15 and the second connection member 16 are formed on the connection adjustment member 14.
[0101]
 Specifically, when the connection adjustment member 14 is attached to the installation body 13 in a state where the first connection plate 14A is directed in the hanging direction when the installation body 13 is in a horizontal state, as shown in FIGS. In addition, the first connecting portion is located at a position where the connecting engaging hole 9 formed on the base end side of the connecting portion 8 and the engaging hole 10 of the center positioning member 7 can substantially match the connecting portion 11 when viewed from the side. 15 (insertion hole 27A) and the insertion hole 28A formed in the base end part of the connection protrusion 25 are comprised so that connection is possible.
[0102]
 On the other hand, when the installation body 13 is in a horizontal state, the connection adjusting member 14 is rotated 180 degrees with respect to the installation body 13 to be connected to the installation body 13, and the first connection plate 14A is directed upward. In this case, as shown in FIGS. 7 to 9, the second connecting plate 14 B protrudes obliquely downward with respect to the installation body 13, and the connecting engaging hole 9 and the center positioning member formed on the distal end side of the connecting portion 8. The second connecting portion 16 (insertion hole 28B) and the insertion hole 28B formed at the distal end of the connection protrusion 25 at a position that can be substantially matched to the connecting portion 11 with the engagement hole 10 of 7 Can be connected.
[0103]
 The installation body 13 is configured to tilt with respect to the base 2 by operating the tilting means B in a predetermined manner.
[0104]
 As the tilting means B, an expansion / contraction mechanism is adopted in which the overall length is variable by rotating the operation unit 31.
[0105]
 Specifically, as shown in FIGS. 1 and 5, the tilting means B includes a screw cylinder 32 having a screw groove formed therein, and an operation portion 31 formed in the head by screwing into the screw cylinder 32. The distal end of the screw cylinder 32 (that is, the side opposite to the insertion side of the screw rod 33) is fixed to the installation body 13 with the screw rod 33 screwed into the screw cylinder 32. The upper part of the screw rod 33 (that is, the operation part 31 forming side) is connected to a predetermined position on the base 2.
[0106]
 Then, by rotating the operation portion 31 in one direction, the screw rod 33 is screwed into the screw cylinder 32, so that the installation body 13 can be pulled up so that the installation body 13 can be tilted upward. It is composed.
[0107]
 On the other hand, by rotating the operation portion 31 in the other direction, the screw rod 33 is protruded from the screw cylinder 32 so that the installation body 13 inclined by a predetermined angle upward can be tilted in the horizontal direction. It is composed.
[0108]
 A cover body 34 that covers the spherical blade 5 is provided on the side of the base 2 where the spherical blade 5 is provided.
[0109]
 Specifically, in this embodiment, as shown in FIGS. 1, 5, and 6, the spherical blade 5 is formed in a shape and size that can cover the entire surface.
[0110]
 More specifically, the cover body 34 is formed in a shape and size that can sufficiently cover the state in which the spherical blade 5 is tilted upward to the maximum with respect to the road surface 6 to the state in which the road surface 6 is cut. It is said.
[0111]
 Note that reference numeral 35 in the drawing denotes a rubber body that prevents cutting powder or the like generated by cutting from scattering to the outside.
[0112]
 As shown in FIGS. 5 and 6, cooling water for cooling the spherical blade 5 that is heated by friction when cutting the road surface 6 is provided in the vicinity of the connecting portion between the rotating shaft 4 and the spherical blade 5. A discharge nozzle 37 for discharging is provided.
[0113]
 Thereby, even if the road surface 6 is cut by the spherical blade 5, the spherical blade 5 can be prevented from being overheated due to friction.
[0114]
 In the figure, reference numeral 38 denotes a water storage tank for storing cooling water.
[0115]
 Further, as shown in FIG. 1, the base body 2 is configured to have a gripping portion 36 that intersects with the gripping portion 17 and that is provided so as to protrude and retract on the side portion of the base body 2. By providing the gripping portion 36, the circular movement of the base body 2 with respect to the center point P can be performed more smoothly than in the prior art.
[0116]
 That is, when the base 2 is moved around, the base 2 can be moved around the center point P by gripping the grip 17 as shown in FIG. By gripping the gripping portion 36 disposed on the side portion of the base body 2 so as to cross the gripping portion 17, the base body 2 can be easily pushed (or pulled) in the circumferential direction. Compared to this, the road surface 6 can be cut into a circle by horizontally rotating the base body 2 very smoothly. For example, when the gripping portion 17a in the vicinity of the gripping portion 36 disposed on the side of the base 2 shown in FIG. 2 is immersed in the frame 2A and the remaining gripping portions 17 and 36 are pushed, the base 2 Can be moved in the circumferential direction very smoothly.
[0117]
 Next, the operation of this embodiment will be described.
[0118]
 First, a case where the periphery of the manhole cover 30 is cut into a circular shape with a small diameter will be described.
[0119]
 A connecting adjustment member 14 is attached to the installation body 13 with the first connecting plate 14A facing downward, and an insertion hole 27A serving as the first connecting portion 15 of the first connecting plate 14A and the base of the connecting protrusion 25 are provided. The insertion hole 28A formed on the end side is connected by a connecting bolt 26.
[0120]
 Then, the spherical blade 5 having a large curvature is connected to the rotating shaft 4.
[0121]
 At this time, the rotation shaft 4 (that is, the installation body 13) is previously tilted upward by the tilting means B so that the spherical blade 5 connected to the rotation shaft 4 is not grounded.
[0122]
 A center positioning member 7 is laid on the manhole, and a center point S is set.
[0123]
 The connecting engagement hole 9 located at the spherical center of the spherical blade 5 and the engagement hole 10 of the center positioning member 7 are matched, and the operating portion 18A is rotated to connect and engage the screw rod 18B. The tip 9 is inserted into and locked in the engagement hole 10 by screwing into the hole 9, and the center positioning member 7 and the protruding piece 8A (the connecting portion 8) are connected.
[0124]
 The prime mover 3 is moved to rotate the spherical blade 5, the operation unit 31 of the tilting means B is operated to tilt the spherical blade 5 in the horizontal direction and contact the road surface 6, and further cut into a predetermined depth.
[0125]
 At this time, the cooling water is discharged from the discharge nozzle in the vicinity of the connecting portion between the rotating shaft 4 and the spherical blade 5 to prevent the spherical blade 5 from being overheated by frictional heat.
[0126]
 The base 2 is moved around the connecting portion 11 between the engaging hole 10 of the center positioning member 7 and the connecting engaging hole 9 of the projecting piece 8A, and the road surface 6 around the manhole cover 30 is cut into a circle. .
[0127]
 At this time, the casters 1 of the base body 2 are in a free state.
[0128]
 After cutting, the spherical blade 5 is detached from the road surface 6 by operating the operating portion 31 of the tilting means B, the connection between the connection engagement hole 9 and the engagement hole 10 is released, and the base body is cut off from the cutting portion of the road surface 6. Move 2.
[0129]
 Next, the case where the periphery of the manhole cover 30 is cut into a large-diameter circle will be described.
[0130]
 A connecting adjustment member 14 is attached to the installation body 13 with the first connecting plate 14A facing directly upward, an insertion hole 27B serving as the second connecting portion 16 of the second connecting plate 14B, and the tip of the connecting projecting body 25. The insertion hole 28B formed on the side is connected by a connecting bolt 26.
[0131]
 The remainder is the same as when cutting into a circular shape with a small diameter.
[0132]
 Note that the present invention is not limited to this embodiment, and the specific configuration of each component can be designed as appropriate.
[0133]
【The invention's effect】
 Since the present invention is configured as described above, the spherical center of each of the plurality of spherical blades is aligned with a connecting portion that is provided on the base and can be connected to a center positioning member disposed at the center of the road surface. A tilting mechanism capable of tilting and moving the spherical blade to a position where it can substantially match the connecting portion formed by connecting the connecting engaging portion and the center positioning member when viewed from the side. The tilting mechanism is configured so that the position of the tilting mechanism can be changed in accordance with the connecting portion between the connecting engagement portion and the center positioning member, so that the driving surface and the like can be moved without sliding relative to the base body. It is an epoch-making road surface cutting device excellent in practicality.
[0134]
 That is, when connecting a spherical blade with a different curvature to the rotating shaft and cutting the road surface into a circular shape with a different diameter, the connecting engagement portion that simply matches the spherical center of the spherical blade attached to the rotating shaft. And connecting the engaging portion of the center positioning member to the selected connecting engaging portion, and adjusting the tilting mechanism so that the tilting mechanism can be swung up and down with the connecting portion as a fulcrum. As described above, for example, the drive unit, the rotation shaft, and the spherical blade are slid and moved relative to the base.NoIt is an epoch-making road surface cutting device with excellent practicality and workability that can easily cut a road surface into a circle with a different diameter without requiring work.
[0135]
 Also, CommunicatingBy changing and adjusting the connection state between the installation body and the base body by the connection adjusting member, the driving section, the rotating shaft and the spherical blade (installation body) are not moved with respect to the base body, and the connection section is supported as a fulcrum. It is a revolutionary road surface cutting device with excellent practicality and workability.
[0136]
 Claims2In the described invention, the spherical surface connected to the rotating shaft can be selected simply by selecting the first connecting portion or the second connecting portion according to the curvature of the spherical blade connected to the rotating shaft and connecting to the base. It is an epoch-making road surface cutting device excellent in practicality that can turn up and down the spherical blade with the connecting portion as a fulcrum in the direction along the spherical shape that can be drawn by the blade.
[0137]
 Claims3In the described invention, the spherical blade can be swung up and down in a direction along the spherical shape drawn by the spherical blade connected to the rotating shaft by a very simple operation, and it is an epoch-making that has excellent workability. It becomes a road surface cutting device.
[0138]
 Claims4In the described invention, the base body is moved to the engagement hole of the center positioning member disposed on the road surface, and the engagement hole of the center positioning member and the connection engagement hole of the connection portion are made to be in a communicating state. An image with excellent workability that allows the center positioning member and the base to be connected by a simple operation by simply inserting and disposing a locking rod into the connection engagement hole and the engagement hole. It becomes a periodic road surface cutting device.
[0139]
 Claims5In the described invention, the center positioning member and the connecting portion can be easily and reliably connected with an easily visible foot, and for example, the center positioning member and the connecting portion can be connected with or removed from the foot and then stand up. As soon as the body is raised, the gripping portion can be gripped again to move the base body, thereby providing an extremely practical road surface cutting device that can exhibit excellent workability.
[Brief description of the drawings]
FIG. 1 is an overall perspective view of the present embodiment.
FIG. 2 is an explanatory plan view showing a use state of the present embodiment.
FIG. 3 is an enlarged explanatory perspective view showing a connecting portion between a base body and a center positioning member according to the present embodiment.
FIG. 4 is an explanatory perspective view showing a connection state between an installation body and a base when a spherical blade having a large curvature is attached to a rotation shaft of the present embodiment.
FIG. 5 is an explanatory side sectional view showing a state in which a spherical blade having a large curvature according to the present embodiment is inclined upward.
FIG. 6 is an explanatory side sectional view showing a state in which a road surface is cut into a predetermined depth by a spherical blade having a large curvature according to the present embodiment.
FIG. 7 is an explanatory perspective view showing a connection state between an installation body and a base when a spherical blade having a small curvature is attached to a rotation shaft of the present embodiment.
FIG. 8 is an explanatory side sectional view showing a state in which a spherical blade having a small curvature according to the present embodiment is inclined upward.
FIG. 9 is an explanatory side sectional view showing a state in which a road surface is cut into a predetermined depth by a spherical blade having a small curvature according to the present embodiment.
FIG. 10 is an explanatory plan view showing the circular movement of the base body around the continuous portion of the embodiment.
FIG. 11 is an explanatory plan view showing a spherical shape drawn by spherical blades having different curvatures according to the present embodiment.
FIG. 12 is an explanatory side sectional view showing a spherical shape drawn by a spherical blade having a different curvature according to the present embodiment.
[Explanation of symbols]
 1 caster
 2 Base
 3 Drive unit
 4 Rotating shaft
 5 Spherical blade
 6 road surface
 7 Center positioning member
 8 connecting parts
 9 Connection engaging part
 10 Engagement part
 11 Connecting section
 13 Installation body
 14 Connection adjustment member
 15 First connection site
 16 Second connection site
 17 Grip part
 18 engagement rod
 A tilting mechanism
 B tilting means
 P center point

Claims

A drive unit is provided on a base body having casters, a spherical blade is connected to a rotation shaft of the drive part, and the spherical blade is rotated by the drive unit to cut the road surface to a predetermined depth while the base point is set at the center point. A road surface cutting device capable of cutting the road surface into a circle by moving around in the horizontal direction as a fulcrum, the center positioning member disposed on the base at the center point of the portion of the road surface to be cut into a circle A connecting portion that can be connected to the connecting portion, and a plurality of connecting engaging portions formed in the connecting portion; a predetermined connecting engaging portion selected from the plurality of connecting engaging portions; and an engaging portion of the center positioning member; The base body can be moved in the horizontal direction around the connecting portion of the coupling engaging portion and the engaging portion that match the center point of the road surface as a fulcrum. The base has at least the drive unit And installation body for installing the rotating shaft and the spherical blade, a connecting adjustment member for tiltably connecting the installation body relative to the substrate, tilting and the coupling adjusting member and the installation body relative to the substrate A tilting mechanism including a tilting means, and a connection portion between the connection adjusting member and the base is disposed at a position where the connection portion of the connection engagement portion and the engagement portion can be substantially matched when viewed from the side. while, the driving unit by the connecting portion of the pivot shaft to the axis line of the rotation shaft is installed at a position can be located, the connecting portion of the pivot shaft and the spherical blade As a fulcrum, it is configured so that it can be swung up and down, and a spherical blade with a different curvature is configured to be replaceable on the rotation shaft, and the positions of the plurality of connection engaging portions provided in the connection portion are different in this curvature. Set to match the spherical center of the spherical blade When replacing Jo blade, by selecting the coupling engaging portion of the site corresponding to the spherical center of the spherical blade while connecting the engagement portion and the coupling engaging portion, connected with the coupling adjusting member and the base body Changing and adjusting the connection state of the connection adjusting member and the base body so that the portion is disposed at a position where it can substantially match the connecting portion between the connection engaging portion and the engagement portion when viewed from the side. Thus, without moving the drive unit, the rotation shaft, and the spherical blade with respect to the base body, the spherical blade is swung up and down with the connecting portion as a fulcrum in a direction along the spherical shape drawn by the spherical blade. road cutting device being characterized in that constitute the tilting mechanism so as to tilt adjustment.

When the spherical blade having a predetermined curvature is connected to the rotation shaft, the installation body is attached to the connection adjusting member so that the spherical blade can be tilted in a direction along a spherical shape drawn by the spherical blade. When a spherical blade having a different curvature and a first connecting portion connected to the base are connected to the rotating shaft, the spherical blade having a different curvature is formed in a direction along a spherical shape drawn by the spherical blade having a different curvature. A second connecting part for connecting the installation body to the base body so as to be able to tilt, and the first connecting part or the second connecting part is selected according to the curvature of the spherical blade connected to the rotating shaft Then, by connecting the installation body to the base body via the first connection portion or the second connection portion, the spherical spherical center drawn by the spherical blade connected to the rotating shaft matches the connecting portion. Let this line Road surface cutting apparatus according to claim 1, characterized by being configured so as to undulating pivoting a spherical blade as a fulcrum.

The road surface cutting device according to claim 2, wherein the first connection part and the second connection part can be selected by changing a mounting direction of the connection adjusting member with respect to the installation body.

The connection engagement portion is a connection engagement hole, the engagement portion is an engagement hole, the connection engagement hole and the engagement hole are matched, and an engagement rod is arranged in the connection engagement hole and the engagement hole. The road surface cutting device according to any one of claims 1 to 3 , wherein the base body and the center positioning member are connected to each other.

To the substrate, a grip portion for gripping when moving the substrate provided, according to claim 1, characterized in that a said connecting portion below the grip portion Road surface cutting device.