JP6211324B2 - Construction machine bucket mounting structure and construction machine - Google Patents

Construction machine bucket mounting structure and construction machine Download PDF

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JP6211324B2
JP6211324B2 JP2013148793A JP2013148793A JP6211324B2 JP 6211324 B2 JP6211324 B2 JP 6211324B2 JP 2013148793 A JP2013148793 A JP 2013148793A JP 2013148793 A JP2013148793 A JP 2013148793A JP 6211324 B2 JP6211324 B2 JP 6211324B2
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bucket
semicircular arc
construction machine
movable jaw
fixed jaw
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JP2015017484A (en
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高田 吉則
吉則 高田
丸山 俊
俊 丸山
満 丸山
満 丸山
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丸山 俊
俊 丸山
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Description

本発明は、パワーショベル等の建設機械のバケットの取付け構造および建設機械に関する。   The present invention relates to a bucket mounting structure for a construction machine such as a power shovel and the construction machine.

従来より、パワーショベル等の建設機械のバケットの取付け構造として、バケットの後部部に所定間隔を空けて設けられた2本のバケット連結ピンにそれぞれ一端開放の固定アゴ部と可動アゴ部とを係合させた後、規制材とコイルばね等により固定アゴ部から可動アゴ部が離れるように付勢する構造や(例えば、特許文献1参照。)、ネジ等を駆動させることによって可動アゴ部を固定アゴ部から離れるように付勢したり(例えば、特許文献2参照。)、さらには専用の油圧シリンダによって可動アゴ部を固定アゴ部から離れるように付勢する構造(例えば、特許文献3参照。)が提案されている。   Conventionally, as a structure for attaching a bucket of a construction machine such as a power shovel, a fixed jaw portion and a movable jaw portion that are open at one end are respectively connected to two bucket connecting pins provided at a predetermined interval in the rear portion of the bucket. After combining, the movable jaw part is fixed by driving a screw or the like (for example, refer to Patent Document 1) or a structure that urges the movable jaw part away from the fixed jaw part by a regulating material and a coil spring or the like. A structure in which the movable jaw is urged away from the fixed jaw by a dedicated hydraulic cylinder (see, for example, Patent Document 2). ) Has been proposed.

特開2011−231505号公報JP 2011-231505 A 実用新案登録第3134696号公報Utility Model Registration No. 3134696 特開平2006−169886号公報Japanese Patent Laid-Open No. 2006-169886

しかし、上述の特許文献1〜3に記載の建設機械のバケット取付け構造では、一端開放の固定アゴ部と可動アゴ部にそれぞれバケット連結ピンを係合させた後、規制材とコイルばねや、ネジまたは油圧シリンダ等によって固定アゴ部から可動アゴ部が離れるように付勢する必要があるため、その分だけコストが増大するという問題があった。   However, in the bucket mounting structure of the construction machine described in Patent Documents 1 to 3, after the bucket connecting pin is engaged with the fixed jaw portion and the movable jaw portion that are open at one end, the regulating member, the coil spring, and the screw Alternatively, since it is necessary to urge the movable jaw portion away from the fixed jaw portion by a hydraulic cylinder or the like, there is a problem that the cost increases accordingly.

また、ネジまたは油圧シリンダ等によって固定アゴ部から可動アゴ部が離れるように付勢しているものの、バケット連結ピンが係合している固定アゴ部と可動アゴ部とは、その一端が開放したままであるため、バケット連結ピンが外れるおそれもあった。   In addition, although the movable jaw portion is urged away from the fixed jaw portion by a screw or a hydraulic cylinder, one end of the fixed jaw portion and the movable jaw portion with which the bucket connecting pin is engaged is opened. As a result, the bucket connecting pin may come off.

そこで、本発明は、このような問題点に着目してなされたもので、可動アゴを動作させるためのネジや油圧シリンダ等の駆動アクチュエータが不要でコストを削減でき、かつ、固定アゴ部と可動アゴ部からバケット連結ピンが外れることを確実に防止できる建設機械のバケット取付け構造および建設機械を提供することを目的とする。   Therefore, the present invention has been made paying attention to such a problem, and a drive actuator such as a screw or a hydraulic cylinder for operating the movable jaw is unnecessary, and the cost can be reduced, and the movable jaw and the movable jaw can be moved. An object of the present invention is to provide a bucket mounting structure for a construction machine and a construction machine that can reliably prevent the bucket connecting pin from coming off from the jaw part.

前記課題を解決するため、本発明の建設機械のバケット取付け構造は、バケットの後部側に所定間隔を空けて設けられた2本のバケット連結ピンそれぞれにパワーショベル等の建設機械の作動アーム先端部に取り付けられた固定アゴ部と、バケット駆動シリンダから伸縮するピストン先端部にバケットリンクを介して取り付けられた可動アゴ部とを係合させてバケットを取付ける建設機械のバケット取付け構造であって、前記固定アゴ部および前記可動アゴ部は、それぞれ、一端開放でバケット連結ピンの外周面に応じた断面半円弧状の半円弧状係合部を有すると共に、その半円弧状係合部に連結ピンを係合させた後、その半円弧状係合部の一端開放側を閉塞して前記半円弧状係合部との間でケット連結ピンを支持する断面半円弧状の半円弧状閉塞部を有し、前記固定アゴ部および前記可動アゴ部の前記半円弧状閉塞部は、それぞれ、第1回動式半円弧状閉塞部片と第2回動式半円弧状閉塞部片とが回動ピンを介して回動可能に連結して構成されており、前記固定アゴ部および前記可動アゴ部の前記半円弧状閉塞部の前記第1回動式半円弧状閉塞部片は、それぞれ、基端側が回動ピンを介して前記第2回動式半円弧状閉塞部片の先端側に回動可能に連結される一方、先端側にバケット連結ピンの外周面に応じた半円弧状当接部を有し、その半円弧状当接部と前記固定アゴ部または前記可動アゴ部の半円弧状係合部との間でバケット連結ピンを挟持して支持し、前記固定アゴ部および前記可動アゴ部の前記半円弧状閉塞部の前記第2回動式半円弧状閉塞部片は、それぞれ、先端側が回動ピンを介して前記第1回動式半円弧状閉塞部片の基端側に回動可能に連結される一方、基端側が回動軸を介して前記固定アゴ部または前記可動アゴ部に回動可能に取付けられており、前記第1回動式半円弧状閉塞部片の半円弧状当接部と前記固定アゴ部または前記可動アゴ部の半円弧状係合部との間でバケット連結ピンを挟んで支持している場合、当該第2回動式半円弧状閉塞部片における前記回動ピンと前記回動軸との間の内側面が半円弧状係合部の外周面に当接することを特徴とする。
ここで、さらに、前記固定アゴ部および前記可動アゴ部それぞれの前記半円弧状閉塞部を構成する前記第1回動式半円弧状閉塞部片の半円弧状当接部と前記固定アゴ部または前記可動アゴ部の半円弧状係合部との間で前記バケット連結ピンを挟んで支持した状態をロックする抜き差し式のロックピンを設けるようにすると良い。
また、前記可動アゴ部は、前記固定アゴ部に対しスライド可能に設けられており、前記固定アゴ部の半円弧状係合部を一方のバケット連結ピンに係合させた後、前記可動アゴ部を前記固定アゴ部に対しスライドさせて前記可動アゴ部の半円弧状係合部を他方のバケット連結ピンに係合させるようにすると良い。
また、前記可動アゴ部は、前記固定アゴ部に対し支点ピンを介して回動可能に設けられており、前記固定アゴ部の半円弧状係合部を一方のバケット連結ピンに係合させた後、前記可動アゴ部を前記固定アゴ部に対し前記支点ピンに沿って回動させて前記可動アゴ部の半円弧状係合部を他方のバケット連結ピンに係合させるとさらに良い。
また、本発明に係る建設機械は、上述の建設機械のバケット取付け構造を備えたことを特徴とする。
In order to solve the above-described problems, the bucket mounting structure for a construction machine according to the present invention includes a front end portion of an operating arm of a construction machine such as a power shovel on each of two bucket connecting pins provided at a predetermined interval on the rear side of the bucket. A bucket mounting structure for a construction machine that attaches a bucket by engaging a fixed jaw portion attached to a movable jaw portion attached via a bucket link to a piston tip portion extending and contracting from a bucket drive cylinder, Each of the fixed jaw portion and the movable jaw portion has a semicircular arc engaging portion having a semicircular arc cross section corresponding to the outer peripheral surface of the bucket connecting pin with one end open, and a connecting pin is provided on the semicircular arc engaging portion. after engaged, sectional semicircular semicircular supporting the bucket connecting pin between closes the one open end side of the semicircular engaging portion and the semicircular engaging portion The fixed jaw part and the semi-arc-shaped closing part of the movable jaw part are respectively a first rotating semi-arc-shaped closing part piece and a second rotating semi-arc-like closing part piece. And the first and second semicircular arc closure pieces of the semicircular arc closure part of the fixed jaw part and the movable jaw part, The base end side is pivotally connected to the distal end side of the second rotational semicircular arc-shaped closing piece via the pivot pin, while the distal end side is semi-corresponding to the outer peripheral surface of the bucket coupling pin. An arcuate abutting portion, and a bucket connecting pin is sandwiched and supported between the semicircular arc abutting portion and the semi-arc-shaped engaging portion of the fixed jaw portion or the movable jaw portion; Each of the second rotating semicircular arc-shaped closing portions of the semicircular arc-shaped closing portion of the movable jaw portion and the movable jaw portion is The base end side of the first rotating semicircular arc-shaped closing piece is rotatably connected via a moving pin, while the base end side is connected to the fixed jaw portion or the movable jaw portion via a rotating shaft. A bucket that is pivotally attached and is between the semicircular contact portion of the first rotational semicircular arc-shaped closing piece and the semicircular engagement portion of the fixed jaw or the movable jaw. When supporting with the connecting pin in between, the inner surface between the rotating pin and the rotating shaft of the second rotating semicircular arc-shaped closing piece abuts the outer peripheral surface of the semicircular engaging portion. It is characterized by touching.
Here, the semicircular arc contact portion of the first rotating semicircular arc-shaped closing portion piece and the fixed jaw portion constituting the semicircular arc-shaped closing portion of each of the fixed jaw portion and the movable jaw portion, and It is preferable to provide an insertion / removal type lock pin that locks a state in which the bucket connecting pin is supported between the movable arc part and the semicircular arc engaging part .
The movable jaw portion is slidably provided with respect to the fixed jaw portion, and after the semicircular arc engaging portion of the fixed jaw portion is engaged with one bucket connecting pin, the movable jaw portion Is preferably slid with respect to the fixed jaw portion so that the semicircular arc engaging portion of the movable jaw portion is engaged with the other bucket connecting pin.
Further, the movable jaw portion is provided so as to be rotatable with respect to the fixed jaw portion via a fulcrum pin, and the semicircular arc engaging portion of the fixed jaw portion is engaged with one bucket connecting pin. After that, it is further preferable that the movable jaw portion is rotated along the fulcrum pin with respect to the fixed jaw portion, and the semicircular arc engaging portion of the movable jaw portion is engaged with the other bucket connecting pin.
A construction machine according to the present invention includes the above-described bucket mounting structure for a construction machine.

本発明に係る建設機械のバケット取付け構造および建設機械では、固定アゴ部および可動アゴ部は、それぞれ、一端開放でバケット連結ピンの外周面に応じた断面半円弧状の半円弧状係合部を有すると共に、その半円弧状係合部に連結ピンを係合させた後、その半円弧状係合部の一端開放側を閉塞して半円弧状係合部との間でパケット連結ピンを支持する断面半円弧状の半円弧状閉塞部を有するため、可動アゴを動作させるためのネジや油圧シリンダ等の駆動アクチュエータが不要でコストを削減できると共に、固定アゴ部と可動アゴ部からバケット連結ピンが外れることを確実に防止できる。   In the bucket mounting structure of a construction machine and the construction machine according to the present invention, each of the fixed jaw portion and the movable jaw portion has a semicircular arc engaging portion having a semicircular arc cross section corresponding to the outer peripheral surface of the bucket connecting pin with one end open. And, after engaging the connecting pin with the semicircular arc engaging portion, close one end open side of the semicircular arc engaging portion to support the packet connecting pin with the semicircular arc engaging portion Because it has a semicircular arc-shaped blocking section that has a semicircular cross section, a driving actuator such as a screw or a hydraulic cylinder for operating the movable jaw is unnecessary, and costs can be reduced, and the bucket connecting pin can be connected to the fixed jaw portion and the movable jaw portion. Can be reliably prevented from coming off.

本発明に係る建設機械のバケット取付け構造を介して作動アームにバケットを取付ける際の状態を示す正面図である。It is a front view which shows the state at the time of attaching a bucket to an operation arm via the bucket mounting structure of the construction machine which concerns on this invention. 本発明に係る建設機械のバケット取付け構造の平面図である。It is a top view of the bucket mounting structure of the construction machine which concerns on this invention. 本発明に係る建設機械のバケット取付け構造の底面図である。It is a bottom view of the bucket attachment structure of the construction machine which concerns on this invention. 本発明に係る建設機械のバケット取付け構造の断面図である。It is sectional drawing of the bucket attachment structure of the construction machine which concerns on this invention. 本発明に係る建設機械のバケット取付け構造の動作状態(固定アゴ部のみ連結ピンに係合した状態)を示す断面図である。It is sectional drawing which shows the operation state (state which only the fixed jaw part engaged with the connection pin) of the bucket mounting structure of the construction machine which concerns on this invention. 本発明に係る建設機械のバケット取付け構造の動作状態(固定アゴ部および可動アゴ部が連結ピンに係合した状態)を示す断面図である。It is sectional drawing which shows the operation state (state in which the fixed jaw part and the movable jaw part were engaged with the connection pin) of the bucket mounting structure of the construction machine which concerns on this invention. 本発明に係る建設機械のバケット取付け構造の動作状態(回動式半円弧状閉塞部による連結ピンを支持し、ロックピン挿入前の状態)を示す断面図である。It is sectional drawing which shows the operation state (The state before supporting the connection pin by the rotation type semicircle-shaped obstruction | occlusion part and inserting a lock pin) of the bucket mounting structure of the construction machine which concerns on this invention. 本発明に係る建設機械のバケット取付け構造の動作状態(回動式半円弧状閉塞部による連結ピンを支持し、ロックピン挿入後の状態)を示す断面図である。It is sectional drawing which shows the operation state (The state after supporting the connection pin by the rotation type semicircle-shaped obstruction | occlusion part and inserting a lock pin) of the bucket mounting structure of the construction machine which concerns on this invention. 回動式半円弧状閉塞部による連結ピンの支持状態を詳細に示す断面図である。It is sectional drawing which shows in detail the support state of the connection pin by a rotation type semicircular arc-shaped obstruction | occlusion part. 2段式回動式半円弧状閉塞部の代わりにスライド式半円弧状閉塞部等を使用した建設機械のバケット取付け構造(スライド式半円弧状閉塞部の格納状態)を示す断面図である。It is sectional drawing which shows the bucket attachment structure (storing state of a slide type semi-arc-shaped obstruction | occlusion part) of the construction machine which uses a slide type semi-arc-form obstruction | occlusion part etc. instead of a two-stage rotation type semi-arc-form obstruction | occlusion part. 2段式回動式半円弧状閉塞部の代わりにスライド式半円弧状閉塞部等を使用した建設機械のバケット取付け構造(スライド式半円弧状閉塞部による連結ピンの支持後の状態)を示す断面図である。A bucket mounting structure for a construction machine that uses a sliding semicircular arc-shaped blocking portion in place of a two-stage rotating semicircular arc-shaped blocking portion (state after the connection pin is supported by the sliding semicircular arc blocking portion) is shown. It is sectional drawing. (a)〜(c)それぞれスライド式半円弧状閉塞部の格納状態、スライド状態、連結ピン支持状態を詳細に示す断面図である。(A)-(c) It is sectional drawing which shows the retracted state, slide state, and connection pin support state of a slide-type semicircular arc-shaped closed part, respectively. 本考案に係る建設機械のバケット取付け構造を可動アゴ部が固定アゴ部に対し支点ピンを介し回動可能に取り付けられた建設機械に適用した例を示す説明図である。It is explanatory drawing which shows the example which applied the bucket attachment structure of the construction machine which concerns on this invention to the construction machine with which the movable jaw part was rotatably attached to the fixed jaw part via the fulcrum pin. 本考案に係る建設機械のバケット取付け構造を可動アゴ部が固定アゴ部に対し支点ピンを介し回動可能に取り付けられた建設機械に適用した他の例を示す説明図である。It is explanatory drawing which shows the other example which applied the bucket attachment structure of the construction machine which concerns on this invention to the construction machine with which the movable jaw part was rotatably attached to the fixed jaw part via the fulcrum pin. 本考案に係る建設機械のバケット取付け構造を可動アゴ部が固定アゴ部に対し支点ピンを介し回動可能に取り付けられた建設機械に適用した他の例を示す説明図である。It is explanatory drawing which shows the other example which applied the bucket attachment structure of the construction machine which concerns on this invention to the construction machine with which the movable jaw part was rotatably attached to the fixed jaw part via the fulcrum pin.

以下、本発明に係る実施の形態の建設機械とそのバケット取付け構造(装置または機構)1について図面を参照しながら具体的に説明する。   Hereinafter, a construction machine and a bucket mounting structure (device or mechanism) 1 according to an embodiment of the present invention will be specifically described with reference to the drawings.

<建設機械のバケット取付け構造1の構成>
本発明の建設機械のバケット取付け構造1は、図1に示すように、バケット2の後部部に所定間隔を空けて設けられた2本のバケット連結ピン2a,2bそれぞれにパワーショベル等の建設機械(図示省略。)の作動アーム3a先端部に取り付けられた固定アゴ部1aと、バケット駆動シリンダ3bから伸縮するピストン3b1先端部にバケットリンク3cを介して取り付けられた可動アゴ部1bとを係合させてバケット2を取付けるものである。なお、図1において、3dは、作動アーム3aに基端部が回動可能に連結される一方、バケット駆動シリンダ3bから伸縮するピストン3b1の先端部とバケットリンク3cの基端部に先端部が回動可能に連結されたアームリンクである。なお、バケット取付け構造1以外のバケット2や、作動アーム3a、バケット駆動シリンダ3b、バケットリンク3c、アームリンク3d等の構成や連結構造は、従来のものと同じで周知である。
<Configuration of construction machine bucket mounting structure 1>
As shown in FIG. 1, a bucket mounting structure 1 for a construction machine according to the present invention includes a construction machine such as a power shovel on each of two bucket connecting pins 2a and 2b provided at a predetermined interval at a rear portion of a bucket 2. A fixed jaw portion 1a attached to the distal end portion of the actuating arm 3a (not shown) and a movable jaw portion 1b attached to the distal end portion of the piston 3b1 extending and contracting from the bucket drive cylinder 3b via the bucket link 3c are engaged. Thus, the bucket 2 is attached. In FIG. 1, reference numeral 3d indicates that the base end portion is rotatably connected to the operating arm 3a, while the tip end portion is at the tip end portion of the piston 3b1 extending and contracting from the bucket drive cylinder 3b and the base end portion of the bucket link 3c. It is an arm link connected so that rotation is possible. The bucket 2 other than the bucket mounting structure 1, the operation arm 3 a, the bucket drive cylinder 3 b, the bucket link 3 c, the arm link 3 d, and the like are the same as the conventional one and are well known.

本発明に係る実施形態のバケット取付け構造1は、図1〜図8に示すように、固定アゴ部1aと、可動アゴ部1bとから構成されている。   As shown in FIGS. 1 to 8, the bucket mounting structure 1 according to the embodiment of the present invention includes a fixed jaw portion 1a and a movable jaw portion 1b.

固定アゴ部1aは、図4に示すように建設機械の作動アーム3aの先端部に固定アゴ連結ピン3a1を介して固定側連結板1a1が回動可能に連結されており、その固定側連結板1a1の下端部には、第1固定基板1a2を介して固定側フック板1a3が取り付けられている。   As shown in FIG. 4, the fixed jaw portion 1a is rotatably connected to the distal end portion of the working arm 3a of the construction machine via the fixed jaw connecting pin 3a1. A fixed-side hook plate 1a3 is attached to the lower end of 1a1 via a first fixed substrate 1a2.

固定側フック板1a3には、バケット連結ピン2aに係合する一端開放でかつバケット連結ピン2aの外周面に応じたほぼ断面半円弧状の半円弧状係合部1a31と、抜差し式ロックピン1a33が挿入されるロックピン用抜差し孔1a32と、回動ピン1a37で回動可能に連結され、回動軸1a34を介して回動することによりバケット連結ピン2aを支持する2段式回動式半円弧状閉塞部を構成する第1回動式半円弧状閉塞部片1a35および第2回動式半円弧状閉塞部片1a36と、ハンドル1a38とが設けられている。   The fixed-side hook plate 1a3 includes a semicircular arc engaging portion 1a31 having an open end that engages with the bucket connecting pin 2a and a substantially arcuate cross section corresponding to the outer peripheral surface of the bucket connecting pin 2a, and a detachable lock pin 1a33. Is inserted into the lock pin insertion / removal hole 1a32 into which the pin is inserted, and is pivotally connected by the rotation pin 1a37. The two-stage rotation type half which supports the bucket connection pin 2a by rotating through the rotation shaft 1a34. A first rotating semicircular arc closing portion piece 1a35 and a second rotating semicircular arc closing portion piece 1a36 constituting an arcuate closing portion, and a handle 1a38 are provided.

つまり、第1回動式半円弧状閉塞部片1a35は、図8や図9に示すように基端側が回動ピン1a37を介して第2回動式半円弧状閉塞部片1a36の先端側に回動可能に連結される一方、先端側にバケット連結ピン2aの外周面に応じた半円弧状当接部1a35aを有し、その半円弧状当接部1a35aと固定アゴ部1aの半円弧状係合部1a31との間でバケット連結ピン2aを挟持して支持する。   In other words, as shown in FIGS. 8 and 9, the first rotation type semicircular arc-shaped closing piece 1a35 has a proximal end side through the rotation pin 1a37 and the distal end side of the second rotation type semicircular arc-shaped closing piece 1a36. And a semicircular contact portion 1a35a corresponding to the outer peripheral surface of the bucket connection pin 2a on the tip side, and the semicircular shape of the semicircular contact portion 1a35a and the fixed jaw portion 1a. The bucket connecting pin 2a is sandwiched and supported between the arcuate engaging portions 1a31.

第2回動式半円弧状閉塞部片1a36は、図8や図9に示すように先端側が回動ピン1a37を介して第1回動式半円弧状閉塞部片1a35の基端側に回動可能に連結される一方、基端側が回動軸1a34を介して固定アゴ部1aに回動可能に取付けられている。そして、ロックピン用抜差し孔1a32に抜差し式ロックピン1a33が挿入され、第1回動式半円弧状閉塞部片1a35の半円弧状当接部1a35aと固定アゴ部1aの半円弧状係合部1a31との間でバケット連結ピン2aを挟んで支持している場合、図9に示すように第2回動式半円弧状閉塞部片1a36における回動ピン1a37と回動軸1a34との間の内側面1a36aが半円弧状係合部1a31の外周面1a31aに当接して、半円弧状係合部1a31を介してバケット連結ピン2aにかかる力を受ける。なお、このようにバケット連結ピン2aを挟んで支持している場合、第1回動式半円弧状閉塞部片1a35両側の端部と、固定アゴ部1aの半円弧状係合部1a31両側の端部とは接触していても、接触しなくてもどちらでも良いが、この実施形態では、後述する図8や図9に示すように第1回動式半円弧状閉塞部片1a35の両端部と、固定アゴ部1aの半円弧状係合部1a31の両端部とは接触してなく、両端部間の内周面がバケット連結ピン2aをその両側から密接状態で確実に挟持する。   As shown in FIGS. 8 and 9, the second rotating semicircular arc-shaped closing piece 1 a 36 rotates at the distal end side to the proximal end side of the first rotating semicircular arc-shaped closing piece 1 a 35 via the rotation pin 1 a 37. The base end side is rotatably attached to the fixed jaw portion 1a via the rotation shaft 1a34 while being connected to be movable. Then, the insertion / removal type lock pin 1a33 is inserted into the insertion / removal hole 1a32 for the lock pin, and the semicircular arc contact portion 1a35a of the first rotation type semicircular arc closing portion 1a35 and the semicircular arc engagement portion of the fixed jaw portion 1a. When the bucket connecting pin 2a is supported between the rotating pin 1a31 and the rotating pin 1a37, the rotating pin 1a37 and the rotating shaft 1a34 in the second rotating semicircular arc-shaped closing piece 1a36 as shown in FIG. The inner surface 1a36a abuts on the outer peripheral surface 1a31a of the semicircular arc engaging portion 1a31 and receives a force applied to the bucket connecting pin 2a via the semicircular arc engaging portion 1a31. In addition, when supporting with the bucket connecting pin 2a sandwiched in this way, the end portions on both sides of the first rotating semicircular arc-shaped closing portion 1a35 and the semicircular arc engaging portions 1a31 on both sides of the fixed jaw portion 1a. In this embodiment, as shown in FIGS. 8 and 9, which will be described later, both ends of the first turning semicircular arc-shaped closing piece 1a35 may be contacted with the end portion. And the both end portions of the semicircular arc engaging portion 1a31 of the fixed jaw portion 1a are not in contact with each other, and the inner peripheral surface between both end portions securely holds the bucket connecting pin 2a in close contact from both sides.

また、第1固定基板1a2には、所定角度で第2固定基板1a4が溶接等によって接合されており、この第2固定基板1a4には、可動アゴ部1bを第2固定基板1a4に沿って図4上X方向にスライドさせるためのスライド用ガイド孔1a41が形成されている。   Further, the second fixed substrate 1a4 is joined to the first fixed substrate 1a2 at a predetermined angle by welding or the like, and the movable jaw portion 1b is illustrated along the second fixed substrate 1a4 on the second fixed substrate 1a4. 4 A slide guide hole 1a41 for sliding in the upward X direction is formed.

可動アゴ部1bは、図1に示すようにバケット駆動シリンダ3bから伸縮するピストン3b1先端部にバケットリンク3cを介して取り付けられ、固定アゴ部1aに対しスライド可能に設けられている。具体的には、可動アゴ部1bは、図4に示すようにバケットリンク3cの先端部にバケット連結ピン2c1を介して可動側連結部1b1が回動可能に連結されており、その可動側連結部1b1の下端部には、スライド基板1b2を介して可動側フック板1b3が取り付けられている。   As shown in FIG. 1, the movable jaw portion 1b is attached to the tip of a piston 3b1 extending and contracting from the bucket drive cylinder 3b via a bucket link 3c, and is slidable with respect to the fixed jaw portion 1a. Specifically, as shown in FIG. 4, the movable jaw portion 1 b is connected to the tip end portion of the bucket link 3 c via a bucket coupling pin 2 c 1 so that the movable side coupling portion 1 b 1 is rotatable. A movable hook plate 1b3 is attached to the lower end of the portion 1b1 via a slide substrate 1b2.

可動側フック板1b3には、バケット連結ピン2b1に係合する半円弧状係合部1b31と、ロックピン1b33が挿入されるロックピン用抜差し孔1b32と、回動ピン1b37で回動可能に連結され、回動軸1b34を介して回動することによりバケット連結ピン2b1をロックする2段式回動式半円弧状閉塞部を構成する第1回動式半円弧状閉塞部片1b35および第2回動式半円弧状閉塞部片1b36と、ハンドル1b38とが設けられている。なお、可動側フック板1b3側の第1回動式半円弧状閉塞部片1b35および第2回動式半円弧状閉塞部片1b36も、図9に示す固定側フック板1a3側の第1回動式半円弧状閉塞部片1a35および第2回動式半円弧状閉塞部片1a36と同様に構成されており、第1回動式半円弧状閉塞部片1b35の半円弧状当接部と固定アゴ部1bの半円弧状係合部1b31との間でバケット連結ピン2aを挟んで支持している場合、第2回動式半円弧状閉塞部片1b36における回動ピン1b37と回動軸1b34との間の内側面が半円弧状係合部1b31の外周面に当接して、半円弧状係合部1b31を介してバケット連結ピン2bにかかる力を受ける。   The movable hook plate 1b3 is rotatably connected by a semicircular arc engaging portion 1b31 that engages with the bucket connecting pin 2b1, a lock pin insertion / removal hole 1b32 into which the lock pin 1b33 is inserted, and a rotation pin 1b37. The first rotation type semicircular arc closing part 1b35 and the second rotation type semicircular arc closing part that locks the bucket connecting pin 2b1 by rotating via the rotation shaft 1b34. A rotating semicircular arc-shaped closing piece 1b36 and a handle 1b38 are provided. Note that the first rotating semicircular arc-shaped blocking portion 1b35 and the second rotating semicircular arc-shaped blocking portion 1b36 on the movable side hook plate 1b3 side are also the first times on the fixed side hook plate 1a3 side shown in FIG. The movable semicircular arc-shaped closing piece 1a35 and the second rotary semicircular arc-shaped closing piece 1a36 are configured in the same manner as the first rotary semicircular arc-shaped closing piece 1b35. When the bucket connecting pin 2a is sandwiched between and supported by the semicircular arc engaging portion 1b31 of the fixed jaw portion 1b, the rotary pin 1b37 and the rotary shaft in the second rotary semicircular arc closing piece 1b36 are supported. The inner surface between 1b34 contacts the outer peripheral surface of the semicircular arc engaging portion 1b31 and receives a force applied to the bucket connecting pin 2b via the semicircular arc engaging portion 1b31.

<建設機械のバケット取付け構造1を使用したバケット2の取付け方法>
次に、本実施形態の建設機械のバケット取付け構造1を使用したバケット2の取付け方法について説明する。
<Mounting method of bucket 2 using bucket mounting structure 1 of construction machine>
Next, the attachment method of the bucket 2 using the bucket attachment structure 1 of the construction machine of this embodiment is demonstrated.

まず、作業者がこの建設機械のアームシリンダ(図示せず。)等を駆動させて作動アーム3aを動作させて、固定アゴ部1aの固定側フック板1a3を、バケット2の後端部の一方のバケット連結ピン2aに係合させる。なお、この状態では、バケット駆動シリンダ3bのピストン3b1(図1参照。)は縮んでおり、固定側フック板1a3の半円弧状係合部1a31と可動側フック板1b3の半円弧状係合部1b31との間は、図4に示すようにバケット2後部部のバケット連結ピン2a,2b間よりも狭い状態にある。   First, an operator drives an arm cylinder (not shown) of the construction machine to operate the operating arm 3a so that the fixed side hook plate 1a3 of the fixed jaw 1a is connected to one of the rear end portions of the bucket 2. Is engaged with the bucket connecting pin 2a. In this state, the piston 3b1 (see FIG. 1) of the bucket drive cylinder 3b is contracted, and the semicircular arc engaging portion 1a31 of the fixed side hook plate 1a3 and the semicircular arc engaging portion of the movable side hook plate 1b3. Between 1b31, it is in a state narrower than between bucket connection pins 2a and 2b of the bucket 2 rear part, as shown in FIG.

次に、作業者がこの建設機械のバケット駆動シリンダ3bを駆動してピストン3b1を伸ばして、図5に示すようにこの第2固定基板1a4のスライド用ガイド孔1a41に従って、可動アゴ部1bを第2固定基板1a4に沿ってX方向にスライドさせて、可動側フック板1b3の半円弧状係合部1b31をバケット2後部部のバケット連結ピン2bの方向へ移動させる。   Next, the operator drives the bucket drive cylinder 3b of the construction machine to extend the piston 3b1, and the movable jaw portion 1b is moved to the first position according to the slide guide hole 1a41 of the second fixed substrate 1a4 as shown in FIG. 2 Slide in the X direction along the fixed substrate 1a4 to move the semicircular arc engaging portion 1b31 of the movable side hook plate 1b3 in the direction of the bucket connecting pin 2b at the rear portion of the bucket 2.

そして、図6に示すように可動側フック板1b3の半円弧状係合部1b31がバケット2後部部のバケット連結ピン2bに当たり、半円弧状係合部1a31と半円弧状係合部1b31がそれぞれバケット2後部部のバケット連結ピン2a,2bに係合すると、作業者は固定側フック板1a3および可動側フック板1b3のロックピン用抜差し孔1a32,1b32それぞれから抜差し式ロックピン1a33,1b33を抜く。   Then, as shown in FIG. 6, the semicircular arc engaging portion 1b31 of the movable hook plate 1b3 hits the bucket connecting pin 2b at the rear portion of the bucket 2, and the semicircular arc engaging portion 1a31 and the semicircular arc engaging portion 1b31 are respectively provided. When engaged with the bucket connecting pins 2a, 2b at the rear portion of the bucket 2, the operator pulls out the lockable lock pins 1a33, 1b33 from the lock pin insertion holes 1a32, 1b32 of the fixed side hook plate 1a3 and the movable side hook plate 1b3, respectively. .

そして、作業者は、図7に示すように固定アゴ部1aのハンドル1a38をY方向(図8上、反時計回り。)に回す一方、可動アゴ部1bのハンドル1b38をY’方向(図8上、時計回り。)に回して、回動軸1a34,1b34それぞれを介して2段式回動式半円弧状閉塞部を構成する第1回動式半円弧状閉塞部片1a35,1b35および第2回動式半円弧状閉塞部片1a36,1b36を回動させ、半円弧状係合部1a31と半円弧状係合部1b31の開放端側を塞ぐ。   Then, as shown in FIG. 7, the operator turns the handle 1a38 of the fixed jaw 1a in the Y direction (counterclockwise in FIG. 8), while turning the handle 1b38 of the movable jaw 1b in the Y ′ direction (FIG. 8). 1st rotation type semicircular arc closure part piece 1a35, 1b35 which comprises two-stage rotation type semicircular arc closure part via rotation axis 1a34, 1b34, respectively, The two-turn semicircular arc closing part pieces 1a36, 1b36 are rotated to close the open end sides of the semicircular arc engaging part 1a31 and the semicircular arc engaging part 1b31.

最後に、作業者は、図8に示すように固定側フック板1a3および可動側フック板1b3のロックピン用抜差し孔1a32,1b32それぞれに抜差し式ロックピン1a33,1b33を差し入れて2段式回動式半円弧状閉塞部を構成する第1回動式半円弧状閉塞部片1a35,1b35および第2回動式半円弧状閉塞部片1a36,1b36の回動をロックして、2段式回動式半円弧状閉塞部を構成する第1回動式半円弧状閉塞部片1a35,1b35および第2回動式半円弧状閉塞部片1a36,1b36によるバケット連結ピン2a,2bの支持状態をロックする。   Finally, as shown in FIG. 8, the operator inserts the lock pin 1a33, 1b33 into the lock pin insertion holes 1a32, 1b32 of the fixed side hook plate 1a3 and the movable side hook plate 1b3, respectively, and rotates in two steps. The rotation of the first rotation type semicircular arc-shaped closing part pieces 1a35, 1b35 and the second rotation type semicircular arc-shaped closing part pieces 1a36, 1b36 constituting the semicircular arc-shaped closing part is locked, and the two-stage rotation The bucket connection pins 2a, 2b are supported by the first rotating semicircular arc-shaped blocking portion pieces 1a35, 1b35 and the second rotating semicircular arc-shaped blocking portion pieces 1a36, 1b36 constituting the movable semicircular arc blocking portion. Lock it.

以上説明したように、本実施形態の建設機械のバケット取付け構造1では、可動アゴ部1bを固定アゴ部1aに対しスライド可能に設け、固定アゴ部1aを一方のバケット連結ピン2aに係合させた後、バケット駆動シリンダ3bによって可動アゴ部1bを固定アゴ部1aに対しスライドさせて他方のバケット連結ピン2bに係合した後、2段式回動式半円弧状閉塞部を構成する第1回動式半円弧状閉塞部片1a35,1b35および第2回動式半円弧状閉塞部片1a36,1b36とをそれぞれ回動軸1a34,1b34を中心に回動させて、固定アゴ部1aおよび可動アゴ部1bの半円弧状係合部1a31,1b31と2段式回動式半円弧状閉塞部を構成する第1回動式半円弧状閉塞部片1a35,1b35との間で挟持してバケット連結ピン2a,2bを支持するようにしたため、可動アゴ1bを動作させるためのネジや油圧シリンダ等の駆動アクチュエータが不要でコストを削減できると共に、固定アゴ部1aと可動アゴ部1bからバケット連結ピン2a,2bが外れることを確実に防止できる。   As described above, in the bucket mounting structure 1 of the construction machine according to the present embodiment, the movable jaw portion 1b is provided to be slidable with respect to the fixed jaw portion 1a, and the fixed jaw portion 1a is engaged with one bucket connecting pin 2a. After that, the movable jaw portion 1b is slid with respect to the fixed jaw portion 1a by the bucket drive cylinder 3b and engaged with the other bucket connecting pin 2b. The rotary semicircular arc-shaped closing piece 1a35, 1b35 and the second rotary semicircular arc-shaped closing piece 1a36, 1b36 are rotated around the rotary shafts 1a34, 1b34, respectively, and the fixed jaw 1a and the movable jaw 1a are movable. The bucket is sandwiched between the semicircular arc engaging portions 1a31, 1b31 of the jaw portion 1b and the first rotary semicircular arc closing piece 1a35, 1b35 constituting the two-stage rotary semicircular arc closing portion. Communicating Since the pins 2a and 2b are supported, a driving actuator such as a screw or a hydraulic cylinder for operating the movable jaw 1b is not required, and the cost can be reduced. The bucket connecting pin 2a is fixed from the fixed jaw 1a and the movable jaw 1b. , 2b can be reliably prevented.

特に、本実施形態の建設機械のバケット取付け構造1では、第1回動式半円弧状閉塞部片1a35の半円弧状当接部1a35aと固定アゴ部1aの半円弧状係合部1a31との間でバケット連結ピン2aを挟んで支持している場合、図9に示すように第2回動式半円弧状閉塞部片1a36における回動ピン1a37と回動軸1a34との間の内側面1a36aが半円弧状係合部1a31の外周面1a31aに当接して半円弧状係合部1a31を介してバケット連結ピン2aにかかる力を受けるため、バケット連結ピン2a,2bにかかる力を第1回動式半円弧状閉塞部片1a35,1b35と第2回動式半円弧状閉塞部片1a36,1b36全体で受けることが可能になり、固定アゴ部1aと可動アゴ部1bからバケット連結ピン2a,2bが外れることをより確実に防止できる。   In particular, in the bucket mounting structure 1 of the construction machine according to the present embodiment, the semicircular arc contact portion 1a35a of the first rotational semicircular arc blocking portion piece 1a35 and the semicircular arc engaging portion 1a31 of the fixed jaw portion 1a. When the bucket connecting pin 2a is supported between them, as shown in FIG. 9, the inner surface 1a36a between the rotating pin 1a37 and the rotating shaft 1a34 in the second rotating semicircular arc-shaped closing part 1a36. Is in contact with the outer peripheral surface 1a31a of the semicircular arc engaging portion 1a31 and receives the force applied to the bucket connecting pin 2a via the semicircular arc engaging portion 1a31. Therefore, the force applied to the bucket connecting pins 2a, 2b is The movable semicircular arc-shaped closing piece 1a35, 1b35 and the second rotating semicircular arc-shaped closing piece 1a36, 1b36 can be received as a whole, and the bucket connecting pin 2a, from the fixed jaw 1a and the movable jaw 1b, 2b It can be more reliably prevented disengaged.

なお、上記実施形態の説明では、固定アゴ部1aの第2固定基板1a4にスライド用ガイド孔1a41を設けて、可動アゴ部1bがスライド用ガイド孔1a41に従ってスライドしてバケット連結ピン2bに係合させるように説明したが、本発明では、これに限らず、他に、リンク機構や、回転機構、印籠継ぎの関係、レール等を用いて、可動アゴ部1bが固定アゴ部1aに対し平行移動や回転移動等によりスライドしてバケット連結ピン2bに係合できれば十分である。   In the description of the above embodiment, the second fixed substrate 1a4 of the fixed jaw portion 1a is provided with the slide guide hole 1a41, and the movable jaw portion 1b slides according to the slide guide hole 1a41 and engages with the bucket connecting pin 2b. However, the present invention is not limited to this, and the movable jaw portion 1b is moved in parallel with respect to the fixed jaw portion 1a by using a link mechanism, a rotation mechanism, a relationship between the seals and the rails, etc. It is sufficient if it can slide and engage with the bucket connecting pin 2b by rotational movement or the like.

また、上記実施形態の説明では、バケット2の取付け後、固定アゴ部1aおよび可動アゴ部1bそれぞれに回転軸1a34,1b34を介して取り付けた2段式回動式半円弧状閉塞部を構成する第1回動式半円弧状閉塞部片1a35,1b35および第2回動式半円弧状閉塞部片1a36,1b36を回動させた後、ロックピン用抜差し孔1a32,1b32それぞれに抜差し式ロックピン1a33,1b33を差し入れてバケット連結ピン2a,2bの支持状態をロックするように説明したが、本発明では、これに限らず、図10〜図13に示すように半円弧状係合部1a31と半円弧状係合部1b31にそれぞれバケット2のバケット連結ピン2a,2bの外周に沿ってスライド(入出)するスライド式半円弧状閉塞部1a39,1b39を設けても良い。   Further, in the description of the above embodiment, after the bucket 2 is attached, a two-stage rotational semicircular arc-shaped closing portion attached to the fixed jaw portion 1a and the movable jaw portion 1b via the rotation shafts 1a34 and 1b34 is configured. After the first rotating semicircular arc-shaped closing portion pieces 1a35, 1b35 and the second rotating semicircular arc-shaped closing portion pieces 1a36, 1b36 are rotated, the lockable lock pins are respectively inserted into the lock pin insertion / removal holes 1a32, 1b32. 1a33, 1b33 is inserted and the supporting state of the bucket connecting pins 2a, 2b is locked. However, the present invention is not limited to this, and as shown in FIGS. Sliding semicircular arc-shaped blocking portions 1a39, 1b3 that slide (enter / exit) along the outer periphery of the bucket coupling pins 2a, 2b of the bucket 2 respectively to the semicircular arc engaging portion 1b31. It may be provided.

図10は、2段式回動式半円弧状閉塞部の代わりにスライド式半円弧状閉塞部1a39,1b39等を使用した建設機械のバケット取付け構造1(スライド式半円弧状閉塞部1a39,1b39の格納状態)を示す断面図であり、図11はスライド式半円弧状閉塞部1a39,1b39等を使用した建設機械のバケット取付け構造1(スライド式半円弧状閉塞部1a39,1b39による連結ピン2a,2bの支持後の状態)を示す断面図である。また、図12(a)〜(c)は、それぞれスライド式半円弧状閉塞部1a39の格納状態、スライド状態、連結ピン2a支持状態を詳細に示す断面図である。   10 shows a bucket mounting structure 1 (sliding semicircular arc-shaped blocking portion 1a39, 1b39) using a sliding semicircular arc-shaped blocking portion 1a39, 1b39 or the like instead of the two-stage rotating semicircular arc-shaped blocking portion. 11 is a cross-sectional view showing a storage state of the construction machine, and FIG. 11 shows a bucket mounting structure 1 (sliding semicircular arc-shaped blocking portions 1a39, 1b39) using the sliding semicircular arc-shaped blocking portions 1a39, 1b39 and the like. , 2b after support). FIGS. 12A to 12C are cross-sectional views showing in detail the retracted state, slide state, and connecting pin 2a support state of the sliding semicircular arc-shaped closing portion 1a39.

この場合、固定アゴ部1aの半円弧状係合部1a31および可動アゴ部1bの半円弧状係合部1b31にそれぞれバケット連結ピン2a,2bを係合させた後、まず、スライド式半円弧状閉塞部1a39,1b39をそのバケット連結ピン2a,2bの外周に沿ってスライド(入出)させて半円弧状係合部1a31と半円弧状係合部1b31の開放端側を塞ぐことにより、半円弧状係合部1a31,1b31と半円弧状係合部1a31,1b31とによりその外周面を覆うようにしてそれぞれバケット連結ピン2a,2bを支持する。   In this case, after the bucket connecting pins 2a and 2b are engaged with the semicircular arc engaging portion 1a31 of the fixed jaw portion 1a and the semicircular arc engaging portion 1b31 of the movable jaw portion 1b, respectively, The closing portions 1a39, 1b39 are slid (entered / exited) along the outer peripheries of the bucket connecting pins 2a, 2b to close the open ends of the semicircular arc engaging portion 1a31 and the semicircular arc engaging portion 1b31. The bucket connecting pins 2a and 2b are supported by the arc-shaped engaging portions 1a31 and 1b31 and the semi-arc-shaped engaging portions 1a31 and 1b31 so as to cover the outer peripheral surfaces thereof.

その後、スライド式半円弧状閉塞部1a39,1b39によるバケット連結ピン2a,2bの支持状態の継続は、例えば、図10や図11に示すようにスライド式半円弧状閉塞部1a39,1b39の被係合部1a39a,1b39aに係合する係合部1a40a,1b40aを有する回動式ロックピン1a40,1b40等の回転によりスライド式半円弧状閉塞部1a39,1b39のスライド状態をロックしてスライド式半円弧状閉塞部1a39,1b39によるバケット連結ピン2a,2bによる支持状態をロックするようにしても良い。   Thereafter, the continuation of the support state of the bucket connecting pins 2a, 2b by the sliding semicircular arc-shaped blocking portions 1a39, 1b39 is, for example, the engagement of the sliding semicircular arc-shaped blocking portions 1a39, 1b39 as shown in FIGS. The sliding state of the sliding semicircular arc-shaped closing portions 1a39, 1b39 is locked by the rotation of the rotary lock pins 1a40, 1b40 having the engaging portions 1a40a, 1b40a engaged with the joint portions 1a39a, 1b39a, and the sliding semicircle You may make it lock the support state by the bucket connection pin 2a, 2b by the arc-shaped obstruction | occlusion part 1a39, 1b39.

なお、図12(a),(c)では、回動式ロックピン1a40の係合部1a40aがスライド式半円弧状閉塞部1a39の被係合部1a39aに係合してスライド式半円弧状閉塞部1a39のスライド状態をロックしている状態を示す一方、図12(b)は、回動式ロックピン1a40の係合部1a40aがそれぞれスライド式半円弧状閉塞部1a39の凹部1a40bに位置してスライド式半円弧状閉塞部1a39はスライドフリー状態にある。   12A and 12C, the engaging portion 1a40a of the rotary lock pin 1a40 is engaged with the engaged portion 1a39a of the sliding semicircular arc-shaped closing portion 1a39, and the sliding semicircular arc-shaped closing is performed. While FIG. 12B shows a state where the sliding state of the portion 1a39 is locked, FIG. 12B shows that the engaging portion 1a40a of the rotary lock pin 1a40 is located in the recess 1a40b of the sliding semicircular arc-shaped closing portion 1a39. The sliding semicircular arc-shaped blocking portion 1a39 is in a slide-free state.

また、スライド式半円弧状閉塞部1a39,1b39のスライド状態のロックは、回動式ロックピン1a40,1b40等の回転に限定されることはなく、ロックできれば十分で、抜差し式ロックピン1a33,1b33を用いても勿論良い。このことは、2段式回動式半円弧状閉塞部を構成する第1回動式半円弧状閉塞部片1a35,1b35および第2回動式半円弧状閉塞部片1a36,1b36の回動状態のロックも同様で、抜差し式ロックピン1a33,1b33によるロックに限らず、他の手段によってロックするように構成しても良い。   Further, the locking of the sliding semicircular arc-shaped blocking portions 1a39, 1b39 in the sliding state is not limited to the rotation of the rotary lock pins 1a40, 1b40 and the like. Of course, it is also possible to use. This is the rotation of the first rotation type semicircular arc closure part pieces 1a35, 1b35 and the second rotation type semicircular arc closure part pieces 1a36, 1b36 constituting the two-stage rotation type semicircular arc closure part. The same is true for the lock of the state, and the lock is not limited to the lock by the removable lock pins 1a33, 1b33, and may be configured to be locked by other means.

また、上記実施の形態では、図1〜図12に示すように、本考案に係る建設機械のバケット取付け構造1を、可動アゴ部1bが固定アゴ部1aに対しスライド可能に取り付けた建設機械に適用して説明したが、本発明ではこれに限らず、可動アゴ部1bが固定アゴ部1aに対し相対的に移動や回動等してバケットを取り付ける構造のものであれば当然に適用可能である。例えば、本考案に係る建設機械のバケット取付け構造1を、図13および図14に示すように、可動アゴ部1bが固定アゴ部1aに対し支点ピン1cを介し回動可能に取り付けられた建設機械に適用するようにしても良いし、あるいは図15に示すように図示しない可動アゴ部が固定アゴ部に対しX字(または十字)状に交差してその交点の支点ピン1cを介し回動可能に取り付けられた建設機械に適用するようにしても良い。   Moreover, in the said embodiment, as shown in FIGS. 1-12, the bucket attachment structure 1 of the construction machine which concerns on this invention is attached to the construction machine which the movable jaw part 1b attached to the fixed jaw part 1a so that sliding was possible. However, the present invention is not limited to this, and the present invention is not limited to this, and is naturally applicable to any structure in which the movable jaw portion 1b is attached to the bucket by moving or rotating relative to the fixed jaw portion 1a. is there. For example, as shown in FIGS. 13 and 14, the construction machine bucket mounting structure 1 according to the present invention has a movable jaw portion 1b rotatably attached to a fixed jaw portion 1a via a fulcrum pin 1c. Alternatively, as shown in FIG. 15, the movable jaw portion (not shown) intersects the fixed jaw portion in an X shape (or cross) and can be rotated via the fulcrum pin 1c at the intersection. You may make it apply to the construction machine attached to.

1 建設機械のバケット取付け構造
1a 固定アゴ部
1a1 固定側連結板
1a2 第1固定基板
1a3 固定側フック板
1a31 半円弧状係合部
1a32 ロックピン用抜差し孔
1a33 抜差し式ロックピン
1a35 第1回動式半円弧状閉塞部片
1a36 第2回動式半円弧状閉塞部片
1a39 スライド式半円弧状閉塞部
1a39a 被係合部
1a40 回動式ロックピン
1a40a 係合部
1a40b 凹部
1a4 第2固定基板
1a41 スライド用ガイド孔
1b 可動アゴ部
1b1 可動側連結部
1b2 スライド基板
1b3 可動側フック板
1b31 半円弧状係合部
1b32 ロックピン用抜差し孔
1b33 抜差し式ロックピン
1b35 第1回動式半円弧状閉塞部片
1b36 第2回動式半円弧状閉塞部片
1b39 スライド式半円弧状閉塞部
1b39a 被係合部
1b40 回動式ロックピン
1b40a 係合部
1b40b 凹部
1c 支点ピン
2 バケット
2a,2b 連結ピン
3a 作動アーム
3b バケット駆動シリンダ
3b1 ピストン
3c バケットリンク
3d アームリンク
DESCRIPTION OF SYMBOLS 1 Bucket mounting structure of construction machine 1a Fixed jaw part 1a1 Fixed side connection plate 1a2 First fixed board 1a3 Fixed side hook board 1a31 Semi-arc-shaped engagement part 1a32 Lock pin insertion / extraction hole 1a33 Removable lock pin 1a35 First rotation type Semicircular arc-shaped closing part 1a36 Second rotational semicircular arc-shaped closing part 1a39 Sliding semicircular arc-shaped closing part 1a39a Engaged part 1a40 Rotary lock pin 1a40a Engaging part 1a40b Recessed part 1a4 Second fixed substrate 1a41 Slide Guide hole 1b Movable jaw portion 1b1 Movable side connecting portion 1b2 Slide substrate 1b3 Movable side hook plate 1b31 Semi-circular engagement portion 1b32 Lock pin insertion / removal hole 1b33 Removable lock pin 1b35 First rotational semi-arc-shaped obstruction piece 1b36 Second rotational semicircular arc-shaped closing piece 1b39 Sliding semicircular arc Closing portion 1b39a engaged portion 1b40 the pivot lock pin 1b40a engaging portion 1b40b recess 1c fulcrum pin 2 bucket 2a, 2b connecting pin 3a actuating arm 3b bucket drive cylinder 3b1 piston 3c bucket link 3d arm link

Claims (5)

バケットの後部側に所定間隔を空けて設けられた2本のバケット連結ピンそれぞれにパワーショベル等の建設機械の作動アーム先端部に取り付けられた固定アゴ部と、バケット駆動シリンダから伸縮するピストン先端部にバケットリンクを介して取り付けられた可動アゴ部とを係合させてバケットを取付ける建設機械のバケット取付け構造であって、
前記固定アゴ部および前記可動アゴ部は、それぞれ、一端開放でバケット連結ピンの外周面に応じた断面半円弧状の半円弧状係合部を有すると共に、その半円弧状係合部に連結ピンを係合させた後、その半円弧状係合部の一端開放側を閉塞して前記半円弧状係合部との間でケット連結ピンを支持する断面半円弧状の半円弧状閉塞部を有し、
前記固定アゴ部および前記可動アゴ部の前記半円弧状閉塞部は、それぞれ、第1回動式半円弧状閉塞部片と第2回動式半円弧状閉塞部片とが回動ピンを介して回動可能に連結して構成されており、
前記固定アゴ部および前記可動アゴ部の前記半円弧状閉塞部の前記第1回動式半円弧状閉塞部片は、それぞれ、基端側が回動ピンを介して前記第2回動式半円弧状閉塞部片の先端側に回動可能に連結される一方、先端側にバケット連結ピンの外周面に応じた半円弧状当接部を有し、その半円弧状当接部と前記固定アゴ部または前記可動アゴ部の半円弧状係合部との間でバケット連結ピンを挟持して支持し、
前記固定アゴ部および前記可動アゴ部の前記半円弧状閉塞部の前記第2回動式半円弧状閉塞部片は、それぞれ、先端側が回動ピンを介して前記第1回動式半円弧状閉塞部片の基端側に回動可能に連結される一方、基端側が回動軸を介して前記固定アゴ部または前記可動アゴ部に回動可能に取付けられており、前記第1回動式半円弧状閉塞部片の半円弧状当接部と前記固定アゴ部または前記可動アゴ部の半円弧状係合部との間でバケット連結ピンを挟んで支持している場合、当該第2回動式半円弧状閉塞部片における前記回動ピンと前記回動軸との間の内側面が半円弧状係合部の外周面に当接することを特徴とする建設機械のバケット取付け構造。
A fixed jaw part attached to the tip of the working arm of a construction machine such as a power shovel on each of the two bucket connecting pins provided at a predetermined interval on the rear side of the bucket, and a piston tip that extends and contracts from the bucket drive cylinder A bucket mounting structure for a construction machine, in which a bucket is attached by engaging a movable jaw part attached to a bucket via a bucket link,
Each of the fixed jaw portion and the movable jaw portion has a semicircular arc engaging portion having a semicircular arc cross section corresponding to the outer peripheral surface of the bucket connecting pin with one end open, and a connecting pin on the semicircular arc engaging portion. after the engaged, semicircular closed portion of the cross-section semicircular supporting a bucket connecting pin between said semicircular engaging portion closes the one open end side of the semicircular engaging portion Have
The semicircular arc-shaped blocking portions of the fixed jaw portion and the movable jaw portion are respectively formed by a first rotating semicircular arc blocking portion piece and a second rotating semicircular arc blocking portion piece via a rotation pin. And is configured to be pivotable,
The first rotation type semicircular arc-shaped closing part piece of the semicircular arc-shaped closing part of the fixed jaw part and the movable jaw part is respectively configured such that the base end side is the second rotation type semicircle via a rotation pin. The arc-shaped closing piece is rotatably connected to the tip end side, and has a semi-arc-shaped contact portion corresponding to the outer peripheral surface of the bucket connecting pin on the tip side, and the semi-arc-shaped contact portion and the fixed jaw A bucket connecting pin is supported between a part or a semi-arc-shaped engaging part of the movable jaw part,
As for the 2nd rotation type semicircular arc closure part piece of the semicircular arc closure part of the fixed jaw part and the movable jaw part, the tip side is the 1st rotation type semicircular arc shape via a rotation pin, respectively. The base end side of the closing part piece is rotatably connected to the base end side, and the base end side is rotatably attached to the fixed jaw portion or the movable jaw portion via a rotation shaft, and the first rotation When the bucket connecting pin is supported between the semicircular arc contact portion of the semicircular arc closing portion and the semicircular engagement portion of the fixed jaw portion or the movable jaw portion, the second A bucket mounting structure for a construction machine, wherein an inner side surface between the rotary pin and the rotary shaft of the rotary semicircular arc-shaped closing part abuts an outer peripheral surface of the semicircular arc engaging part.
請求項1記載の建設機械のバケット取付け構造において、
さらに、前記固定アゴ部および前記可動アゴ部それぞれの前記半円弧状閉塞部を構成する前記第1回動式半円弧状閉塞部片の半円弧状当接部と前記固定アゴ部または前記可動アゴ部の半円弧状係合部との間で前記バケット連結ピンを挟んで支持した状態をロックする抜き差し式のロックピンを設けたことを特徴とする建設機械のバケット取付け構造。
The bucket mounting structure for a construction machine according to claim 1,
Furthermore, the semicircular arc contact portion of the first rotating semicircular arc-shaped closing portion and the fixed jaw portion or the movable jaw constituting the semicircular arc-shaped closing portion of each of the fixed jaw portion and the movable jaw portion. A bucket mounting structure for a construction machine, characterized in that an insertion / removal type lock pin is provided for locking a state in which the bucket connecting pin is sandwiched between and supported by a semicircular arc engaging portion of the portion .
請求項1または請求項2記載の建設機械のバケット取付け構造において、
前記可動アゴ部は、前記固定アゴ部に対しスライド可能に設けられており、前記固定アゴ部の半円弧状係合部を一方のバケット連結ピンに係合させた後、前記可動アゴ部を前記固定アゴ部に対しスライドさせて前記可動アゴ部の半円弧状係合部を他方のバケット連結ピンに係合させることを特徴とする建設機械のバケット取付け構造。
In the bucket mounting structure of the construction machine according to claim 1 or 2,
The movable jaw portion is provided so as to be slidable with respect to the fixed jaw portion. After engaging the semicircular arc engaging portion of the fixed jaw portion with one bucket connecting pin, the movable jaw portion is A bucket mounting structure for a construction machine, wherein the semi-circular engaging portion of the movable jaw is engaged with the other bucket connecting pin by sliding with respect to the fixed jaw.
請求項1または請求項2記載の建設機械のバケット取付け構造において、
前記可動アゴ部は、前記固定アゴ部に対し支点ピンを介して回動可能に設けられており、前記固定アゴ部の半円弧状係合部を一方のバケット連結ピンに係合させた後、前記可動アゴ部を前記固定アゴ部に対し前記支点ピンに沿って回動させて前記可動アゴ部の半円弧状係合部を他方のバケット連結ピンに係合させることを特徴とする建設機械のバケット取付け構造。
In the bucket mounting structure of the construction machine according to claim 1 or 2,
The movable jaw part is provided rotatably with respect to the fixed jaw part via a fulcrum pin, and after engaging the semicircular arc engaging part of the fixed jaw part with one bucket connecting pin, A construction machine characterized in that the movable jaw part is rotated with respect to the fixed jaw part along the fulcrum pin to engage the semicircular arc engaging part of the movable jaw part with the other bucket connecting pin. Bucket mounting structure.
請求項1〜請求項4のいずれか一の請求項に記載の建設機械のバケット取付け構造を備えたことを特徴とする建設機械。   A construction machine comprising the bucket mounting structure for a construction machine according to any one of claims 1 to 4.
JP2013148793A 2013-06-10 2013-07-17 Construction machine bucket mounting structure and construction machine Active JP6211324B2 (en)

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Cited By (3)

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Publication number Priority date Publication date Assignee Title
US10612208B2 (en) 2018-03-15 2020-04-07 Shun Maruyama Attachment holder for construction equipment and construction machine
JP2020159175A (en) * 2019-03-25 2020-10-01 丸山 俊 Attachment mounting jig of construction machine and construction machine
JP7221168B2 (en) 2019-08-28 2023-02-13 ヤマハ発動機株式会社 Tray storage device and component mounting device

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JP7160316B2 (en) * 2018-07-31 2022-10-25 和光機械工業株式会社 Attachment removal device

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JPS6393934A (en) * 1986-10-03 1988-04-25 スチユア−ト.アレキサンダ−.エセツクス Connection assembly for construction machine
JP2535653B2 (en) * 1990-07-25 1996-09-18 株式会社レンタルのニッケン Attachment / detachment mechanism for construction machinery
JP3030543U (en) * 1996-03-29 1996-11-01 ジャクティ・エンジニアリング株式会社 Attachment device for power shovel attachment
JP3677905B2 (en) * 1996-11-14 2005-08-03 株式会社小松製作所 Construction machine work equipment attachment / detachment device
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JP5438588B2 (en) * 2010-04-27 2014-03-12 加奈 安田 Attachment attachment / detachment device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10612208B2 (en) 2018-03-15 2020-04-07 Shun Maruyama Attachment holder for construction equipment and construction machine
JP2020159175A (en) * 2019-03-25 2020-10-01 丸山 俊 Attachment mounting jig of construction machine and construction machine
JP7221168B2 (en) 2019-08-28 2023-02-13 ヤマハ発動機株式会社 Tray storage device and component mounting device

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