JPH0735876Y2 - Backhoe excavation collision prevention structure - Google Patents
Backhoe excavation collision prevention structureInfo
- Publication number
- JPH0735876Y2 JPH0735876Y2 JP1988049082U JP4908288U JPH0735876Y2 JP H0735876 Y2 JPH0735876 Y2 JP H0735876Y2 JP 1988049082 U JP1988049082 U JP 1988049082U JP 4908288 U JP4908288 U JP 4908288U JP H0735876 Y2 JPH0735876 Y2 JP H0735876Y2
- Authority
- JP
- Japan
- Prior art keywords
- boom
- tip
- arm
- excavation
- relative rotation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Operation Control Of Excavators (AREA)
- Component Parts Of Construction Machinery (AREA)
Description
【考案の詳細な説明】 （イ）産業上の利用分野 本考案は、例えばキャビン又はキャノピー等の機体にバ
ケット等が衝突するのを防止することを可能ならしめる
バックホーに於ける掘削部衝突防止構造に関する。DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention is a structure for preventing collision of excavated parts in a backhoe that can prevent a bucket or the like from colliding with a body such as a cabin or a canopy. Regarding
（ロ）従来の技術 先端にアーム支持体の装着された中間アームの基部を機
体に対しての起伏自在なブームの先端に揺動駆動可能に
軸着する一方、先端にバケットの装着されたアームの基
部を前記アーム支持体の先部に揺動駆動可能に軸着した
構成の掘削部を具備してなるバックホーは従来より存在
している（例えば実開昭61−169161号公報参照）。(B) Conventional technology The base of an intermediate arm with an arm support attached to the tip is pivotally mounted on the tip of a boom that can be raised and lowered with respect to the machine body so that it can be driven to swing, and an arm with a bucket attached to the tip. Conventionally, there has been a backhoe including an excavating portion having a base portion of the arm support member pivotally attached to the tip portion of the arm support member (see, for example, Japanese Utility Model Laid-Open No. 61-169161).
（ハ）考案が解決しようとする課題 上記した従来のバックホーにあっては、掘削部を縮退姿
勢状態（ブームを起立させ且つバケットをブームに近接
させた状態）としたときにバケットがキャビン又はキャ
ノピー等に衝突してこれらを破損させたり、また操縦者
の安全を脅かす等の問題があった。(C) Problems to be Solved by the Invention In the above-mentioned conventional backhoe, when the excavation portion is in the retracted posture state (the boom is upright and the bucket is close to the boom), the bucket is in the cabin or the canopy. There were problems such as collision with the vehicle and damage them, and threatening the safety of the operator.
本考案は上記問題点を解消するために成されたもので、
掘削部が他の機体構成物（例えばキャビン又はキャノピ
ー等）に衝突するのを防止し得るものとしたバックホー
に於ける掘削部衝突防止構造を提供することを目的とす
る。The present invention was made to solve the above problems,
An object of the present invention is to provide an excavation part collision prevention structure in a backhoe capable of preventing the excavation part from colliding with another airframe component (for example, a cabin or a canopy).
（ニ）課題を解決するための手段 上記目的を達成するための本考案を実施例に於ける図中
の対応個所の符号を引用して説明すると、先端にアーム
支持体（７）の装着された中間アーム（６）の基部を機
体に対しての起伏自在なブーム（５）の先端に揺動駆動
可能に軸着する一方、先端にバケット（９）の装着され
たアーム（８）の基部を前記アーム支持体（７）の先部
に揺動駆動可能に軸着した構成の掘削部（２）を具備し
たバックホーに於いて、前記機体とブーム（５）との相
対回動を検出する検出機構（15）を装設し、且つ掘削部
（２）の駆動装置は前記相対回動が所定状態となったこ
とを検出機構（15）が検出した一定状態下で掘削部
（２）の駆動を停止させる構成になす一方、前記一定状
態下で掘削部（２）の駆動を可能なららしめる補助駆動
装置を形成し、且つ前記検出機構（15）は前記相対回動
に連動して相対変位するカム（18）とカムローラ（19）
とを設けてこれらの相対変位により検出信号の発せられ
る構成とし、しかも、前記カム（18）を円弧状に形成す
ると共に、ブーム（５）の支軸の近傍で、支軸を中心と
した円周上に配設したことを特徴とする。(D) Means for Solving the Problems The present invention for achieving the above object will be described with reference to the reference numerals of the corresponding portions in the drawings in the embodiments. The arm support (7) is attached to the tip. While the base of the intermediate arm (6) is pivotally attached to the tip of the boom (5) that can be raised and lowered with respect to the machine body so as to be swingable, the base of the arm (8) having the bucket (9) attached to the tip thereof. In a backhoe including an excavation unit (2) having a structure in which a tip end of the arm support (7) is swingably driven, the relative rotation between the body and the boom (5) is detected. The detection mechanism (15) is installed, and the drive unit of the excavation part (2) is operated under a constant condition where the detection mechanism (15) detects that the relative rotation has reached a predetermined state. While the drive is stopped, the excavation part (2) can be driven under the constant condition. The auxiliary drive is formed, and the detection mechanism (15) cam relative displacement in conjunction with the relative rotation is (18) and cam rollers (19)
Is provided so that a detection signal is generated by their relative displacement, and the cam (18) is formed in an arc shape, and a circle centered on the support shaft near the support shaft of the boom (5). It is characterized in that it is arranged on the circumference.
また前記掘削部（２）の駆動装置は、前記各相対回動が
所定状態となったことを検出機構（15）が検出した一定
状態下で前記中間アーム（６）を所定姿勢に自動変位さ
せる構成に成したものでも差支えない。Further, the drive device of the excavation section (2) automatically displaces the intermediate arm (6) to a predetermined posture under a constant state in which the detection mechanism (15) detects that each of the relative rotations has reached a predetermined state. It does not matter if it is configured.
（ホ）作用 掘削部（２）が機体との衝突寸前の姿勢になったこと
は、検出機構（15）が作動状態となることで検出され
る。したがってこの検出により掘削部（２）を停止させ
たり、或いは適宜な変位を生じしめることが可能とな
る。(E) Action The fact that the excavation section (2) is in a posture on the verge of collision with the airframe is detected by the activation of the detection mechanism (15). Therefore, by this detection, it becomes possible to stop the excavation part (2) or to cause an appropriate displacement.
（ヘ）実施例 以下、本考案の具体的な実施例を図面により詳述する。(F) Embodiment Hereinafter, a specific embodiment of the present invention will be described in detail with reference to the drawings.
第１図〜第５図は本考案に係るバックホーを示してお
り、（１）は図示しない走行装置に支持された旋回フレ
ームであって、その上面には掘削部（２）が形成される
と共に、タンクやキャノピー（３）等の他、各種艤装品
（４）が配設されている。1 to 5 show a backhoe according to the present invention, in which (1) is a revolving frame supported by a traveling device (not shown), and an excavation section (2) is formed on the upper surface thereof. In addition to the tank, canopy (3) and the like, various outfittings (4) are provided.
前記掘削部（２）はブーム（５）、中間アーム（６）、
アーム支持体（７）、アーム（８）及びバケット（９）
等から成る。即ち、ブーム（５）は旋回フレーム（１）
に同体的に位置決めされた支軸としての水平軸（10）に
その基部を支承されて起伏駆動自在に成されている。こ
のブーム（５）の先端には中間アーム（６）の基部が縦
軸（11）を介して枢着されると共に中間アーム（６）の
先端にはアーム支持体（７）がやはり縦軸（12）廻りに
揺動可能に装着されており、中間アーム（６）が縦軸
（11）廻りに揺動変位することでアーム支持体（７）が
ブーム（５）に沿った方向を維持しつつ左右へ変位する
構成に成されている。そしてアーム支持体（７）の先部
に水平軸（13）を介してアーム（８）の基部が枢着さ
れ、且つアーム（８）の先端にバケット（９）が水平軸
（14）廻りの揺動駆動可能に装着されている。The excavation part (2) includes a boom (5), an intermediate arm (6),
Arm support (7), arm (8) and bucket (9)
Etc. That is, the boom (5) is the swing frame (1)
A base is supported by a horizontal shaft (10) as a support shaft which is integrally positioned with the base so that it can be driven to move up and down. The base of the intermediate arm (6) is pivotally attached to the tip of the boom (5) via the vertical axis (11), and the arm support (7) is also attached to the vertical axis ( 12) It is mounted so as to be swingable around, and the arm support (7) maintains the direction along the boom (5) by swinging displacement of the intermediate arm (6) around the vertical axis (11). While being configured to be displaced to the left and right. The base of the arm (8) is pivotally attached to the tip of the arm support (7) through the horizontal shaft (13), and the bucket (9) is attached to the tip of the arm (8) around the horizontal shaft (14). It is mounted so that it can be swung.
しかして前記掘削部（２）には旋回フレーム（１）とブ
ーム（５）との相対回動、ブーム（５）と中間アーム
（６）との相対回動、及びアーム支持体（７）とアーム
（８）との相対回動の夫々が所定状態となったことを各
相対回動毎に検出する三つの検出機構（15）（16）（1
7）が装設される。Then, in the excavation part (2), relative rotation of the swing frame (1) and the boom (5), relative rotation of the boom (5) and the intermediate arm (6), and an arm support (7). Three detection mechanisms (15) (16) (1) that detect that each of the relative rotations with the arm (8) has reached a predetermined state for each relative rotation.
7) is installed.
各検出機構（15）（16）（17）は第４図に示すとおり相
対回動する一側のものに固定される円弧状カム（18）
と、その他側のものに装設されるカムローラ（19）及び
リミットスイッチ（20）とから成り、その具体的態様を
例えば一つの検出機構（15）で説明すれば第５図に示す
如くブーム（５）側に上記円弧状カム（18）を同ブーム
（５）の水平軸（10）の近傍で、同水平軸（10）を中心
とした円周上に配設し、そして旋回フレーム（１）側に
カムローラ（19）及びリミットスイッチ（20）を対応さ
せて配設している。そして検出機構（15）はブーム
（５）がほぼ起立しきったときに作動状態（即ち、通電
状態）となり、また他の一つの検出機構（16）は中間ア
ーム（６）の先端が前面視右側（第３図中、矢印（f1）
の方向）すなわちキャノピー（３）側へ回動したときに
作動状態となり、さらに他の一つの検出機構（17）はア
ーム（６）が下方へほぼ回動しきったときに作動状態と
なるように設定してある。Each detection mechanism (15) (16) (17) is an arcuate cam (18) fixed to one side that relatively rotates as shown in FIG.
And a limit switch (20) and a cam roller (19) mounted on the other side of the boom, as shown in FIG. 5) The arcuate cam (18) is arranged near the horizontal axis (10) of the boom (5) on the circumference of the boom (5) around the horizontal axis (10). ) Side, the cam roller (19) and the limit switch (20) are arranged correspondingly. The detection mechanism (15) is in the operating state (that is, the energized state) when the boom (5) is almost upright, and the other detection mechanism (16) has the tip of the intermediate arm (6) at the right side when viewed from the front. (In Fig. 3, arrow (f1)
Direction), i.e., when it is turned to the side of the canopy (3), it is activated, and the other detection mechanism (17) is turned on when the arm (6) is almost rotated downward. It is set.
前記各検出機構（15）（16）（17）はブーム（５）の図
示しない駆動装置を構成する電気回路に組み込まれてあ
って、例えば三つの検出機構（15）（16）（17）が全て
作動状態となったときに前記駆動装置による掘削部
（２）の駆動を不可能となさしめて掘削部（２）を一定
姿勢でロック状態となすように関連している。Each of the detection mechanisms (15) (16) (17) is incorporated in an electric circuit that constitutes a drive device (not shown) of the boom (5). For example, three detection mechanisms (15) (16) (17) It is related to prohibiting the driving of the excavation part (2) by the drive device when all of them are in the operating state so that the excavation part (2) is locked in a fixed posture.
さらに他方では図示しない補助駆動装置が設けてあり、
この装置は三つの検出機構（15）（16）（17）が全て作
動状態となったときでも掘削部（２）を駆動変位させ得
る機能を具備したものである。On the other hand, an auxiliary drive device (not shown) is provided,
This device has a function of drivingly displacing the excavation part (2) even when all of the three detection mechanisms (15), (16) and (17) are in the operating state.
なお、ブーム（５）の側部には第２図に示すようにゴム
板（21）を設けるのが好ましい。このゴム板（21）は艤
装品（４）の前面傾斜部に並設した十分な高さの突状固
定部（22）（23）とブーム（５）の側面から張り出させ
た固定部材（24）とに渡って張設した構成であり、その
大きさは前面視に於いてブーム（５）左側の艤装品
（４）を完全に覆うに足りるものに設定してある。そし
てゴム板（21）の長手方向中間部であってその前方個所
にはブーム（５）の側面に固定した垂れ下がり防止杆
（25）が設けてある。A rubber plate (21) is preferably provided on the side of the boom (5) as shown in FIG. The rubber plate (21) is provided with juxtaposed fixing portions (22) (23) of sufficient height, which are juxtaposed to the front inclined portion of the equipment (4), and a fixing member (which extends from the side surface of the boom (5) ( 24) and is stretched over, and its size is set to be sufficient to completely cover the outfitting (4) on the left side of the boom (5) in front view. A hanging prevention rod (25) fixed to the side surface of the boom (5) is provided at a front portion of the rubber plate (21) in the longitudinal direction.
上記構成に於いて、掘削作業中に中間フレーム（６）を
キャノピー（３）側、即ち矢印（f1）の方向に変位させ
た状態下で掘削部（２）を小旋回させるべくブーム
（５）を起立させ且つアーム（８）を下方回動させる
と、アーム（８）やバケット（９）はキャノピー（３）
等と衝突する程に近接しようとする。しかしアーム
（８）やバケット（９）が許容範囲を越えてキャノピー
（３）等に近接すると、各検出機構（15）（16）（17）
が作動状態となるため、前記駆動装置が掘削部（２）の
駆動を停止し掘削部（２）をキャノピー（３）等との衝
突前にロック状態となさしめる。これにより掘削部
（２）の衝突事故は未然に阻止されることになる。この
後に於いては、作業者等は掘削部（２）が衝突する危険
を意識しつつ補助駆動装置を注意深く操作して掘削部
（２）を衝突の危険から退避させるようにする。In the above structure, during excavation work, the boom (5) is made to make a small turn of the excavation part (2) while the intermediate frame (6) is displaced in the canopy (3) side, that is, in the direction of the arrow (f1). When the arm (8) is raised and the arm (8) is rotated downward, the arm (8) and the bucket (9) move to the canopy (3).
Try to get close enough to collide with etc. However, if the arm (8) and bucket (9) exceed the allowable range and approach the canopy (3), etc., each detection mechanism (15) (16) (17)
Is activated, the drive device stops the driving of the excavation part (2) and locks the excavation part (2) before the collision with the canopy (3) or the like. As a result, the collision accident of the excavation part (2) is prevented in advance. After this, the worker or the like carefully operates the auxiliary drive device while paying attention to the risk of collision of the excavation part (2), so that the excavation part (2) is retracted from the risk of collision.
さらに別の実施態様としては、掘削部（２）を駆動する
ための駆動装置を、例えば検出機構（15）が作動状態と
なったときに中間アーム（６）を自動的に矢印（f1）の
反対方向へ変位させてブーム（５）の先端を真っ直ぐに
延長した姿勢になさしめる機能を具備したものと成し
て、掘削部（２）と機体の衝突を回避し得るようにして
もよい。As yet another embodiment, a drive device for driving the excavation part (2), for example, when the detection mechanism (15) is in an operating state, the intermediate arm (6) is automatically moved to the arrow (f1) position. The boom (5) may be displaced in the opposite direction to have a function of straightening the tip of the boom (5) into a posture in which the tip of the boom (5) is straightened to avoid collision between the excavation part (2) and the airframe.
（ト）考案の効果 以上、本考案によれば、検出機構のはたらきにより掘削
部の一定姿勢状態で駆動装置によるその駆動が不可能と
なることから、作業者等は事前に衝突の危険を知ること
ができ且つ掘削部を補助駆動装置により注意深く駆動し
衝突の危険から回避させることができる。(G) Effect of the Invention As described above, according to the present invention, the operation of the detection mechanism makes it impossible for the driving device to drive the excavation part in a constant posture, so that the worker or the like knows the risk of collision in advance. And the excavation section can be carefully driven by an auxiliary drive to avoid the risk of collision.
また、通常の掘削作業では検出機構の全てが作動状態と
なることを避け得るため不都合なく掘削作業することが
可能となる。Further, in normal excavation work, it is possible to avoid that all of the detection mechanisms are activated, so that excavation work can be performed without inconvenience.
しかも、カムを円弧状に形成すると共に、ブームの支軸
の近傍で、支軸を中心とした円周上に配設したので、検
出精度が高く、また、危険領域の設定が確実に行える。Moreover, since the cam is formed in the shape of an arc and is arranged on the circumference of the boom around the support shaft in the vicinity of the support shaft, the detection accuracy is high and the dangerous area can be set reliably.
さらに、ブームの上昇における一定状態下となる特定範
囲では、中間アームを所定姿勢に自動変位させる構成と
したので、掘削部のオフセット部が構危険領域を確実に
回避できてアームやバケットが機体に衝突することを防
止できる。Furthermore, the intermediate arm is automatically displaced to a predetermined posture in a certain range where the boom is raised, so that the offset part of the excavation part can reliably avoid the structural danger area, and the arm and bucket can move to the machine body. It is possible to prevent collision.
第１図は本考案に係るバックホーの要部を示す側面図、
第２図はブーム周辺を前面から見た図、第３図は中間ア
ームの作動を示す説明図、第４図は検出機構の説明図、
第５図は旋回フレームとブームとの相対回動を検出する
検出機構の説明図である。 １……旋回フレーム ２……掘削部 ５……ブーム ６……中間アーム ７……アーム支持体 ８……アーム ９……バケット 15、16、17……検出機構 18……カム 19……カムローラFIG. 1 is a side view showing a main part of a backhoe according to the present invention,
2 is a front view of the vicinity of the boom, FIG. 3 is an explanatory view showing the operation of the intermediate arm, FIG. 4 is an explanatory view of the detection mechanism,
FIG. 5 is an explanatory diagram of a detection mechanism that detects relative rotation between the swing frame and the boom. 1 ... Revolving frame 2 ... Excavator 5 ... Boom 6 ... Intermediate arm 7 ... Arm support 8 ... Arm 9 ... Bucket 15, 16, 17 ... Detection mechanism 18 ... Cam 19 ... Cam roller
Claims (2)
間アーム（６）の基部を機体に対しての起伏自在なブー
ム（５）の先端に揺動駆動可能に軸着する一方、先端に
バケット（９）の装着されたアーム（８）の基部を前記
アーム支持体（７）の先部に揺動駆動可能に軸着した構
成の掘削部（２）を具備したバックホーに於いて、 前記機体とブーム（５）との相対回動を検出する検出機
構（15）を装設し、且つ掘削部（２）の駆動装置は前記
相対回動が所定状態となったことを検出機構（15）が検
出した一定状態下で掘削部（２）の駆動を停止させる構
成になす一方、前記一定状態下で掘削部（２）の駆動を
可能なららしめる補助駆動装置を形成し、且つ前記検出
機構（15）は前記相対回動に連動して相対変位するカム
（18）とカムローラ（19）とを設けてこれらの相対変位
により検出信号の発せられる構成とし、しかも、前記カ
ム（18）を円弧状に形成すると共に、ブーム（５）の支
軸の近傍で、支軸を中心とした円周上に配設したことを
特徴とするバックホーに於ける掘削部衝突防止構造。1. A base of an intermediate arm (6) having an arm support (7) attached to the tip thereof is pivotally attached to the tip of a boom (5) which can be raised and lowered with respect to the machine body so as to be swingable. A backhoe comprising an excavation part (2) having a structure in which a base part of an arm (8) having a bucket (9) attached to a tip thereof is pivotally mounted on a tip part of the arm support body (7) so as to be swingable. A detection mechanism (15) for detecting relative rotation between the machine body and the boom (5), and a drive unit of the excavation unit (2) detects that the relative rotation has reached a predetermined state. While the driving of the excavation part (2) is stopped under the constant state detected by (15), an auxiliary drive device for enabling the driving of the excavation part (2) under the constant state is formed, and The detection mechanism (15) includes a cam (18) and a cam roller (19) which are relatively displaced in association with the relative rotation. Is provided so that a detection signal is generated by their relative displacement, and the cam (18) is formed in an arc shape, and a circle centered on the support shaft near the support shaft of the boom (5). A structure for preventing collision with an excavated portion in a backhoe, which is arranged on the circumference.
間アーム（６）の基部を機体に対しての起伏自在なブー
ム（５）の先端に揺動駆動可能に軸着する一方、先端に
バケット（９）の装着されたアーム（８）の基部を前記
アーム支持体（７）の先部に揺動駆動可能に軸着した構
成の掘削部（２）を具備したバックホーに於いて、 前記機体とブーム（５）との相対回動を検出する検出機
構（15）を装設し、且つ掘削部（２）の駆動装置は前記
相対回動が所定状態となったことを検出機構（15）が検
出した一定状態下で前記中間アーム（６）を所定姿勢に
自動変位させる構成に成し、且つ前記検出機構（15）は
前記相対回動に連動して相対変位するカム（18）とカム
ローラ（19）とを設けてこれらの相対変位により検出信
号の発せられる構成とし、しかも、前記カム（18）を円
弧状に形成すると共に、ブーム（５）の支軸の近傍で、
支軸を中心とした円周上に配設したことを特徴とするバ
ックホーに於ける掘削部衝突防止構造。2. A base of an intermediate arm (6) having an arm support (7) attached to the tip thereof is pivotally attached to the tip of a boom (5) which can be raised and lowered with respect to the machine body so as to be swingable. A backhoe comprising an excavation part (2) having a structure in which a base part of an arm (8) having a bucket (9) attached to a tip thereof is pivotally mounted on a tip part of the arm support body (7) so as to be swingable. A detection mechanism (15) for detecting relative rotation between the machine body and the boom (5), and a drive unit of the excavation unit (2) detects that the relative rotation has reached a predetermined state. The intermediate arm (6) is automatically displaced to a predetermined posture under a constant condition detected by (15), and the detection mechanism (15) is cam (18) which is relatively displaced in association with the relative rotation. ) And a cam roller (19) are provided, and a detection signal is generated by the relative displacement of these. Moreover, to form the said cam (18) in an arc shape, in the vicinity of the support shaft of the boom (5),
A structure for preventing collision with an excavated portion in a backhoe, which is arranged on a circumference centered on a support shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988049082U JPH0735876Y2 (en) | 1988-04-11 | 1988-04-11 | Backhoe excavation collision prevention structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988049082U JPH0735876Y2 (en) | 1988-04-11 | 1988-04-11 | Backhoe excavation collision prevention structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01150652U JPH01150652U (en) | 1989-10-18 |
| JPH0735876Y2 true JPH0735876Y2 (en) | 1995-08-16 |
Family
ID=31275201
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988049082U Expired - Lifetime JPH0735876Y2 (en) | 1988-04-11 | 1988-04-11 | Backhoe excavation collision prevention structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0735876Y2 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH053561Y2 (en) * | 1985-04-03 | 1993-01-28 | ||
| JPS639360U (en) * | 1986-07-01 | 1988-01-21 |
-
1988
- 1988-04-11 JP JP1988049082U patent/JPH0735876Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01150652U (en) | 1989-10-18 |
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