JP7710385B2 - Rotating mechanism and boarding/alighting barrier device equipped with the same - Google Patents
Rotating mechanism and boarding/alighting barrier device equipped with the sameInfo
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Description
本発明は、第一回動部材と第二回動部材とが連動して基材に対して回動する回動機構及びそれを備えた乗降遮断装置に関する。 The present invention relates to a rotation mechanism in which a first rotating member and a second rotating member rotate in conjunction with each other relative to a base material, and a boarding/alighting barrier device equipped with the same.
以下、背景技術について説明する。以下の説明において、かっこ書きの符号等は先行技術文献における符号等である。
特許文献１（特開２０１５－６８００９号公報）には、作業用機械に設けられる油圧アクチュエータの油圧系を作動状態及び非作動状態の間で切り替えるために用いる回動機構が記載されている。この回動機構は、基板（３）と、基板（３）に対して第一回動軸（４１）を中心にして回動可能に軸支される第一回動部材（４）と、基板（３）に対して第二回動軸（５２）を中心にして回動可能に軸支される第二回動部材（５）とを備えている。この回動機構は、作業用機械の座席に至る通路の周囲に設けられ、第一回動部材（４）にはグリップ（４２）が装着され、第二回動部材（５）には遮断棒（５１）が装着されている。第一回動部材（４）及び第二回動部材（５）が回動して第一姿勢にある場合に、遮断棒は通路に張り出して通路を遮断する遮断位置に位置し、第一回動部材（４）及び第二回動部材（５）が回動して第二姿勢にある場合に、遮断棒（５１）は通路から退避して通路を遮断しない退避位置に位置する。つまり、操縦者は、グリップ（４２）を操作して遮断棒（５１）を遮断位置に移動させること、及び、グリップ（４２）を操作して遮断棒（５１）を退避位置に移動させることができる。
The following is a description of the background art. In the following description, the symbols in parentheses are symbols in the prior art documents.
Patent Document 1 (JP 2015-68009 A) describes a rotation mechanism used to switch the hydraulic system of a hydraulic actuator provided in a work machine between an operating state and a non-operating state. This rotation mechanism includes a base plate (3), a first rotating member (4) supported to be rotatable about a first rotating shaft (41) relative to the base plate (3), and a second rotating member (5) supported to be rotatable about a second rotating shaft (52) relative to the base plate (3). This rotation mechanism is provided around a passage leading to a seat of the work machine, and a grip (42) is attached to the first rotating member (4) and a blocking bar (51) is attached to the second rotating member (5). When the first rotating member (4) and the second rotating member (5) are rotated to a first position, the barrier bar is located at a blocking position where it projects into the passage and blocks the passage, and when the first rotating member (4) and the second rotating member (5) are rotated to a second position, the barrier bar (51) is located at a retracted position where it retracts from the passage and does not block the passage. In other words, the operator can operate the grip (42) to move the barrier bar (51) to the blocking position, and can operate the grip (42) to move the barrier bar (51) to the retracted position.
基板（３）には、第一回動部材（４）及び第二回動部材（５）が回動して第一姿勢にある場合に、作業用機械に設けられる油圧アクチュエータの油圧系を作動状態に切り替え、第一回動部材（４）及び第二回動部材（５）が回動して第二姿勢にある場合に、油圧アクチュエータの油圧系を非作動状態に切り替えるために用いられるリミットスイッチ（９）が設けられる。つまり、操縦者が座席に座って遮断棒（５１）を遮断位置に移動させた場合に、油圧アクチュエータの油圧系は作動状態になる。この状態では遮断棒（５１）は遮断位置に移動しているため、操縦者は座席に至る通路を通行すること、即ち、座席から離れることが許容されない状態になる。それに対して、操縦者が作業用機械の操作を終了して遮断棒（５１）を退避位置に移動させた場合に、油圧アクチュエータの油圧系は非作動状態になる。この状態では遮断棒は退避位置に移動しているため、操縦者は座席に至る通路を通行すること、即ち、座席から離れることが許容される状態になる。 The base plate (3) is provided with a limit switch (9) that is used to switch the hydraulic system of the hydraulic actuator provided on the work machine to an active state when the first rotating member (4) and the second rotating member (5) are rotated to a first position, and to switch the hydraulic system of the hydraulic actuator to a non-active state when the first rotating member (4) and the second rotating member (5) are rotated to a second position. In other words, when the operator sits on the seat and moves the cutoff rod (51) to the cutoff position, the hydraulic system of the hydraulic actuator is activated. In this state, the cutoff rod (51) has moved to the cutoff position, so the operator is not allowed to pass through the passage leading to the seat, i.e., to leave the seat. On the other hand, when the operator finishes operating the work machine and moves the cutoff rod (51) to the retracted position, the hydraulic system of the hydraulic actuator is deactivated. In this state, the cutoff rod has moved to the retracted position, so the operator is allowed to pass through the passage leading to the seat, i.e., to leave the seat.
このように、作業用機械に上述したような回動機構を設置することで、油圧アクチュエータの油圧系が作動状態になっている間は、操縦者が座席から離れないようにして、且つ、操縦者が座席から離れることが許容される間は、油圧アクチュエータの油圧系が非作動状態になるようにできる。 In this way, by installing a rotation mechanism as described above on a work machine, it is possible to prevent the operator from leaving the seat while the hydraulic system of the hydraulic actuator is in an operating state, and to keep the hydraulic system of the hydraulic actuator in an inoperable state while the operator is permitted to leave the seat.
このような回動機構では、操縦者によって操作されない限りは上述したような第一姿勢及び第二姿勢の状態が維持されることが必要である。そのために、従来から、第一回動部材及び第二回動部材を勝手に回動させないための付勢部材が設けられている。例えば、特許文献１に記載の回動機構では、付勢部材（６）としての引っ張りコイルばねを用いて、上述したような第一姿勢及び第二姿勢の状態を維持しようとしている。また、特許文献２（特開平９－２５６５０号公報）では、第一回動部材（第１のレバー２６）及び第二回動部材（第２のレバー３０）が勝手に回動しないように、付勢部材としてのばね（３３）の弾性作用が利用されている。 In such a rotation mechanism, it is necessary that the first and second positions described above be maintained unless operated by the operator. For this reason, a biasing member has been provided in the past to prevent the first and second rotation members from rotating on their own. For example, the rotation mechanism described in Patent Document 1 uses a tension coil spring as the biasing member (6) to maintain the first and second positions described above. In Patent Document 2 (JP Patent Publication 9-25650), the elastic action of a spring (33) as a biasing member is used to prevent the first and second rotation members (first lever 26) and (second lever 30) from rotating on their own.
回動機構が設置される作業用機械には強い振動が加わることが想定される。従って、そのような振動によって第一回動部材及び第二回動部材が勝手に回動しないように、上述した付勢部材によって加えられる付勢力を大きくすることが好ましい。つまり、第一姿勢に至る際に第一回動部材及び第二回動部材に加わる付勢力を大きくしてその状態が確実に維持され、第二姿勢に至る際に第一回動部材及び第二回動部材に加わる付勢力を大きくしてその状態が確実に維持されることが好ましい。 It is expected that the work machine on which the rotation mechanism is installed will be subjected to strong vibrations. Therefore, it is preferable to increase the biasing force applied by the above-mentioned biasing member so that the first and second rotating members do not rotate unintentionally due to such vibrations. In other words, it is preferable to increase the biasing force applied to the first and second rotating members when they reach the first position so that this state is reliably maintained, and to increase the biasing force applied to the first and second rotating members when they reach the second position so that this state is reliably maintained.
但し、付勢部材による付勢力を大きくすると、第一回動部材及び第二回動部材が回動して第一姿勢で停止する際、及び、第一回動部材及び第二回動部材が回動して第二姿勢で停止する際に第一回動部材及び第二回動部材に加わる衝撃が大きくなる。このような衝撃が繰り返し作用することを考慮すると、第一回動部材及び第二回動部材の破損を回避して耐久性を確保するために各部材の強度を必要以上に高めることが求められる。特に、第一回動部材及び第二回動部材が平坦ではなく、折れ曲がりやねじれ等の応力が集中し得る箇所を有している場合、そのような箇所の強度を必要以上に高めることが求められる。 However, if the biasing force of the biasing member is increased, the impact on the first and second rotating members will be greater when they rotate and stop in the first position, and when they rotate and stop in the second position. Considering that such impacts will act repeatedly, it is necessary to increase the strength of each member more than necessary to avoid damage to the first and second rotating members and ensure their durability. In particular, if the first and second rotating members are not flat and have areas where stress such as bending or twisting can concentrate, it is necessary to increase the strength of such areas more than necessary.
本発明は、上記の課題に鑑みてなされたものであり、その目的は、第一回動部材及び第二回動部材が意図せずに姿勢変化することを防ぎながら、第一回動部材及び第二回動部材に加わる衝撃を和らげることができる回動機構及びそれを備えた乗降遮断装置を提供する点にある。 The present invention was made in consideration of the above problems, and its purpose is to provide a rotation mechanism and a boarding/alighting barrier device equipped with the same that can cushion the impact on the first and second rotating members while preventing the first and second rotating members from unintentionally changing their positions.
上記目的を達成するための本発明に係る回動機構の特徴構成は、基材と、前記基材に対して第一回動軸を中心にして回動可能に軸支される第一回動部材と、前記基材に対して第二回動軸を中心にして回動可能に軸支される第二回動部材と、付勢部材と、を備え、前記第一回動部材は前記第一回動軸から離れた位置に設けられた嵌合軸を有し、前記第二回動部材は前記嵌合軸が嵌め込まれた遊嵌孔を有し、前記嵌合軸が前記遊嵌孔内を移動しながら前記第一回動部材と前記第二回動部材とが連動して前記基材に対して回動することで、前記第一回動部材及び前記第二回動部材が第一姿勢と第二姿勢とに姿勢変化する回動機構であって、
前記付勢部材は、前記第一回動部材及び前記第二回動部材を、前記第一姿勢と前記第二姿勢との間の中間姿勢から前記第一姿勢と前記第二姿勢とのそれぞれに向かう側に付勢するように構成され、
前記基材には、前記第一回動部材及び前記第二回動部材が前記第一姿勢である場合に、前記付勢部材の付勢力によって前記第一回動部材及び前記第二回動部材の少なくとも何れか一つが直接的又は間接的に押し当てられる第一規制部と、前記第一回動部材及び前記第二回動部材が前記第二姿勢である場合に、前記付勢部材の付勢力によって前記第一回動部材及び前記第二回動部材の少なくとも何れか一つが直接的又は間接的に押し当てられる第二規制部とが設けられ、
前記第一規制部及び前記第二規制部の少なくとも一方は、前記付勢部材の付勢力によって前記第一回動部材及び前記第二回動部材の少なくとも何れか一つが直接的又は間接的に押し当てられる方向である押当て方向に沿って弾性変形可能に構成されている点にある。
A characteristic configuration of a rotation mechanism according to the present invention for achieving the above object is a rotation mechanism comprising: a substrate; a first rotating member rotatably supported on the substrate about a first rotating shaft; a second rotating member rotatably supported on the substrate about a second rotating shaft; and a biasing member, wherein the first rotating member has a fitting shaft provided at a position away from the first rotating shaft, and the second rotating member has a loose fitting hole into which the fitting shaft is fitted, and the first rotating member and the second rotating member rotate relative to the substrate in conjunction with each other while the fitting shaft moves within the loose fitting hole, thereby changing the position of the first rotating member and the second rotating member between a first position and a second position,
the biasing member is configured to bias the first rotation member and the second rotation member from an intermediate position between the first position and the second position toward each of the first position and the second position,
the base material is provided with a first regulating portion against which at least one of the first rotating member and the second rotating member is directly or indirectly pressed by the biasing force of the biasing member when the first rotating member and the second rotating member are in the first position, and a second regulating portion against which at least one of the first rotating member and the second rotating member is directly or indirectly pressed by the biasing force of the biasing member when the first rotating member and the second rotating member are in the second position,
At least one of the first regulating portion and the second regulating portion is configured to be elastically deformable along a pressing direction, which is a direction in which at least one of the first rotating member and the second rotating member is pressed directly or indirectly by the biasing force of the biasing member.
上記特徴構成によれば、第一規制部が上記押当て方向に沿って弾性変形可能に構成されていれば、第一回動部材及び第二回動部材が回動して第一姿勢にある場合、第一回動部材及び第二回動部材の少なくとも何れか一つは、付勢部材によって、第一規制部を上記押当て方向に沿って弾性変形させながら直接的又は間接的に第一規制部に押し当てられる。これにより、第一回動部材及び第二回動部材の回動が規制される。更に、第一回動部材及び第二回動部材が回動して第一姿勢で停止する際に付勢部材によって第一回動部材及び第二回動部材に加わる衝撃が、第一規制部の弾性変形により緩和される。そのため、第一回動部材及び第二回動部材の強度を必要以上に高めることなく耐久性を確保できる。加えて、第一回動部材及び第二回動部材に加わる衝撃が第一規制部で緩和されるため、振動などによって第一回動部材及び第二回動部材が第一姿勢から勝手に回動することを防止するために、付勢部材による付勢力を大きくすることができる。 According to the above characteristic configuration, if the first regulating portion is configured to be elastically deformable along the pressing direction, when the first rotating member and the second rotating member rotate to the first position, at least one of the first rotating member and the second rotating member is directly or indirectly pressed against the first regulating portion by the biasing member while elastically deforming the first regulating portion along the pressing direction. This restricts the rotation of the first rotating member and the second rotating member. Furthermore, when the first rotating member and the second rotating member rotate and stop in the first position, the impact applied to the first rotating member and the second rotating member by the biasing member is mitigated by the elastic deformation of the first regulating portion. Therefore, durability can be ensured without increasing the strength of the first rotating member and the second rotating member more than necessary. In addition, since the impact applied to the first rotating member and the second rotating member is mitigated by the first regulating portion, the biasing force by the biasing member can be increased to prevent the first rotating member and the second rotating member from rotating from the first position by vibration or the like.
同様に、第二規制部が上記押当て方向に沿って弾性変形可能に構成されていれば、第一回動部材及び第二回動部材が回動して第二姿勢にある場合、第一回動部材及び第二回動部材の少なくとも何れか一つは、付勢部材によって、第二規制部を上記押当て方向に沿って弾性変形させながら直接的又は間接的に第二規制部に押し当てられる。これにより、第一回動部材及び第二回動部材の回動が規制される。更に、第一回動部材及び第二回動部材が回動して第二姿勢で停止する際に付勢部材によって第一回動部材及び第二回動部材に加わる衝撃が、第二規制部の弾性変形により緩和される。そのため、第一回動部材及び第二回動部材の強度を必要以上に高めることなく耐久性を確保できる。加えて、第一回動部材及び第二回動部材に加わる衝撃が第二規制部で緩和されるため、振動などによって第一回動部材及び第二回動部材が第二姿勢から勝手に回動することを防止するために、付勢部材による付勢力を大きくすることができる。 Similarly, if the second regulating portion is configured to be elastically deformable along the pressing direction, when the first rotating member and the second rotating member rotate to the second position, at least one of the first rotating member and the second rotating member is pressed directly or indirectly against the second regulating portion by the biasing member while elastically deforming the second regulating portion along the pressing direction. This restricts the rotation of the first rotating member and the second rotating member. Furthermore, when the first rotating member and the second rotating member rotate and stop in the second position, the impact applied to the first rotating member and the second rotating member by the biasing member is mitigated by the elastic deformation of the second regulating portion. Therefore, durability can be ensured without increasing the strength of the first rotating member and the second rotating member more than necessary. In addition, since the impact applied to the first rotating member and the second rotating member is mitigated by the second regulating portion, the biasing force by the biasing member can be increased to prevent the first rotating member and the second rotating member from rotating from the second position by vibration or the like.
本発明に係る回動機構の別の特徴構成は、前記第一規制部及び前記第二規制部の少なくとも一方は、前記第一回動部材及び前記第二回動部材の少なくとも何れか一つが直接的又は間接的に押し当てられる位置に配置され、前記押当て方向に沿って弾性変形可能な板状に形成されている点にある。 Another characteristic feature of the rotation mechanism according to the present invention is that at least one of the first and second regulating parts is disposed at a position where at least one of the first and second rotating members is pressed directly or indirectly against the first and second rotating members, and is formed in a plate shape that is elastically deformable along the pressing direction.
上記特徴構成によれば、第一規制部が上記押当て方向に沿って弾性変形可能な板状に形成されていれば、第一回動部材及び第二回動部材が回動して第一姿勢にある場合、第一回動部材及び第二回動部材の少なくとも何れか一つは、直接的又は間接的に板状の第一規制部に当たる。つまり、第一規制部は、広い領域で、第一回動部材及び第二回動部材の少なくとも何れか一つを直接的又は間接的に確実に受けて、衝撃を緩和できる。 According to the above characteristic configuration, if the first restricting portion is formed in a plate shape that is elastically deformable along the pressing direction, when the first rotating member and the second rotating member rotate to the first position, at least one of the first rotating member and the second rotating member directly or indirectly contacts the plate-shaped first restricting portion. In other words, the first restricting portion can directly or indirectly receive at least one of the first rotating member and the second rotating member over a wide area, thereby mitigating the impact.
同様に、第二規制部が上記押当て方向に沿って弾性変形可能な板状に形成されていれば、第一回動部材及び第二回動部材が回動して第二姿勢にある場合、第一回動部材及び第二回動部材の少なくとも何れか一つは、直接的又は間接的に板状の第二規制部に当たる。つまり、第二規制部は、広い領域で、第一回動部材及び第二回動部材の少なくとも何れか一つを直接的又は間接的に確実に受けて、衝撃を緩和できる。 Similarly, if the second regulating portion is formed in a plate shape that is elastically deformable along the pressing direction, when the first rotating member and the second rotating member rotate to the second position, at least one of the first rotating member and the second rotating member directly or indirectly contacts the plate-shaped second regulating portion. In other words, the second regulating portion can directly or indirectly receive at least one of the first rotating member and the second rotating member over a wide area, thereby mitigating the impact.
本発明に係る回動機構の更に別の特徴構成は、一枚の板状部材を用いて形成された板ばね部材を備え、前記板ばね部材は、前記基材の本体部に固定される固定部と、前記固定部から第一方向に延出すると共に先端が自由端とされた第一延出部と、前記固定部から前記第一方向とは反対側を向く第二方向に延出すると共に先端が自由端とされた第二延出部と、を備え、前記第一延出部に前記第一規制部が設けられ、前記第二延出部に前記第二規制部が設けられている点にある。 Another characteristic feature of the rotation mechanism according to the present invention is that it comprises a leaf spring member formed using a single plate-shaped member, the leaf spring member comprising a fixed portion fixed to the main body of the base material, a first extending portion extending from the fixed portion in a first direction and having a free end at its tip, and a second extending portion extending from the fixed portion in a second direction facing the opposite side to the first direction and having a free end at its tip, the first restricting portion being provided on the first extending portion, and the second restricting portion being provided on the second extending portion.
上記特徴構成によれば、板ばね部材が備える第一延出部は先端が自由端とされているため、第一延出部に設けられる第一規制部は弾性変形可能な状態で位置を変えることができる。そして、第一回動部材及び第二回動部材が回動して第一姿勢にある場合、第一回動部材及び第二回動部材の少なくとも何れか一つは、第一規制部を構成する板ばね部材の板面に直接的又は間接的に当たる。つまり、第一規制部は、広い領域で、第一回動部材及び第二回動部材の少なくとも何れか一つを直接的又は間接的に確実に受けて、衝撃を緩和できる。 According to the above characteristic configuration, the tip of the first extension portion of the leaf spring member is a free end, so the first regulating portion provided on the first extension portion can change its position in an elastically deformable state. When the first rotating member and the second rotating member rotate to the first position, at least one of the first rotating member and the second rotating member directly or indirectly contacts the plate surface of the leaf spring member constituting the first regulating portion. In other words, the first regulating portion can reliably receive at least one of the first rotating member and the second rotating member directly or indirectly over a wide area, thereby mitigating the impact.
同様に、板ばね部材が備える第二延出部は先端が自由端とされているため、第二延出部に設けられる第二規制部は弾性変形可能な状態で位置を変えることができる。そして、第一回動部材及び第二回動部材が回動して第二姿勢にある場合、第一回動部材及び第二回動部材の少なくとも何れか一つは、第二規制部を構成する板ばね部材の板面に直接的又は間接的に当たる。つまり、第二規制部は、広い領域で、第一回動部材及び第二回動部材の少なくとも何れか一つを直接的又は間接的に確実に受けて、衝撃を緩和できる。 Similarly, since the tip of the second extension portion of the leaf spring member is a free end, the second restriction portion provided on the second extension portion can change position in an elastically deformable state. When the first rotating member and the second rotating member rotate to the second position, at least one of the first rotating member and the second rotating member directly or indirectly contacts the plate surface of the leaf spring member constituting the second restriction portion. In other words, the second restriction portion can reliably receive at least one of the first rotating member and the second rotating member directly or indirectly over a wide area, thereby mitigating the impact.
加えて、上記特徴構成によれば、一枚の板ばね部材を用いて、当該板ばね部材を基材の本体部に固定するだけで、弾性変形可能な第一規制部及び第二規制部を設けることができる。 In addition, according to the above characteristic configuration, it is possible to provide an elastically deformable first restricting portion and a second restricting portion by simply using a single leaf spring member and fixing the leaf spring member to the main body portion of the substrate.
本発明に係る乗降遮断装置の特徴構成は、作業用機械の座席に至る通路の周囲に設けられる乗降遮断装置であって、
上記回動機構と、
前記第一回動部材及び前記第二回動部材の一方に設けられた遮断棒と、
前記第一回動部材及び前記第二回動部材の他方に設けられ、前記作業用機械の操縦者に操作される操作部と、
前記第一回動部材及び前記第二回動部材が前記第一姿勢である場合に、前記遮断棒は前記通路に張り出して前記通路を遮断する遮断位置に配置され、
前記第一回動部材及び前記第二回動部材が前記第二姿勢である場合に、前記遮断棒は前記通路から退避した退避位置に配置される点にある。
A characteristic configuration of the getting-on/off barrier device according to the present invention is a getting-on/off barrier device provided around an aisle leading to a seat of a work machine, comprising:
The rotation mechanism,
a blocking bar provided on one of the first rotating member and the second rotating member;
an operating unit provided on the other of the first rotating member and the second rotating member and operated by an operator of the working machine;
When the first rotating member and the second rotating member are in the first position, the blocking bar is disposed at a blocking position where it projects into the passage and blocks the passage,
When the first rotating member and the second rotating member are in the second position, the blocking bar is disposed at a retracted position retracted from the passage.
上記特徴構成によれば、遮断棒は、操縦者が操作部を動かすことで第一回動部材及び第二回動部材が回動して第一姿勢にある場合に、作業用機械の座席に至る通路に張り出してその通路を遮断する遮断位置に位置する。つまり、遮断棒により、座席に居る操縦者が座席から離れることが阻止される。また、遮断棒は、操縦者が操作部を動かすことで第一回動部材及び第二回動部材が回動して第二姿勢にある場合に、通路から退避して通路を遮断しない退避位置に位置する。つまり、操縦者が座席から離れることが許容される。更に、上記回動機構を用いることで、遮断棒が遮断位置にある状態及び退避位置にある状態のそれぞれが確実に維持される。 According to the above characteristic configuration, when the operator moves the operating part to rotate the first and second rotating members to a first position, the barrier bar is positioned in a blocking position where it overhangs the passageway leading to the seat of the work machine and blocks the passageway. In other words, the barrier bar prevents the operator in the seat from leaving the seat. In addition, when the operator moves the operating part to rotate the first and second rotating members to a second position, the barrier bar is positioned in a retracted position where it retracts from the passageway and does not block the passageway. In other words, the operator is allowed to leave the seat. Furthermore, by using the above rotation mechanism, the barrier bar is reliably maintained in both the blocking position and the retracted position.
本発明に係る乗降遮断装置の別の特徴構成は、前記基材に取り付けられ、前記第一回動部材及び前記第二回動部材が前記第一姿勢であるか否かを検出する検出装置を備え、
前記検出装置が前記第一姿勢であることを検出している場合にのみ、前記作業用機械に設けられる油圧アクチュエータの油圧系が作動状態となる点にある。
Another characteristic configuration of the boarding/exiting barrier device according to the present invention is a detection device attached to the base material and detecting whether the first rotation member and the second rotation member are in the first position,
The hydraulic system of a hydraulic actuator provided in the working machine is brought into an operating state only when the detection device detects that the working machine is in the first position.
上記特徴構成によれば、検出装置が、第一回動部材及び第二回動部材が第一姿勢であることを検出している場合にのみ、即ち、遮断棒が遮断位置に位置している場合にのみ、作業用機械に設けられる油圧アクチュエータの油圧系が作動状態になる。その結果、作業用機械が動作可能になる。それに対して、検出装置が、第一回動部材及び第二回動部材が第一姿勢であることを検出していない場合、例えば、遮断棒が遮断位置に位置しておらず、操縦者が座席から離れている場合などには、作業用機械に設けられる油圧アクチュエータの油圧系が作動状態にならない。その結果、作業用機械が動作不能になる。つまり、油圧アクチュエータの油圧系が作動状態になっている間は、操縦者が座席から離れないようにして、且つ、操縦者が座席から離れることが許容される間は、油圧アクチュエータの油圧系が作動状態にならないようにできる。また、上記のとおり、付勢部材による付勢力を大きくして振動などによって第一回動部材及び第二回動部材が第一姿勢から勝手に回動することを防止できるため、このような検出装置の構成であっても、作業用機械の使用中に誤って油圧アクチュエータの油圧系が非作動状態になることを回避できる。 According to the above characteristic configuration, the hydraulic system of the hydraulic actuator provided in the work machine is activated only when the detection device detects that the first and second rotating members are in the first position, i.e., only when the cutoff rod is in the cutoff position. As a result, the work machine can be operated. On the other hand, if the detection device does not detect that the first and second rotating members are in the first position, for example, when the cutoff rod is not in the cutoff position and the operator is away from the seat, the hydraulic system of the hydraulic actuator provided in the work machine is not activated. As a result, the work machine cannot be operated. In other words, while the hydraulic system of the hydraulic actuator is in an activated state, the operator is prevented from leaving the seat, and while the operator is allowed to leave the seat, the hydraulic system of the hydraulic actuator is not activated. In addition, as described above, the biasing force of the biasing member can be increased to prevent the first and second rotating members from rotating from the first position by vibration or the like, so that even with such a configuration of the detection device, it is possible to avoid the hydraulic system of the hydraulic actuator being in an inactivated state accidentally while the work machine is in use.
以下に図面を参照して本発明の実施形態に係る回動機構２１及び乗降遮断装置２０について説明する。
図１は、乗降遮断装置２０が作業用機械１の座席７に設けられている状態を示す図である。油圧ショベル等の作業用機械１の運転室２の床６には、操縦者が作業用機械１を操縦する際に着座する座席７が設けられる。操縦者は、出入口４の通路８を通って運転室２に出入りできる。作業用機械１には、複数の油圧アクチュエータ１３が設けられると共に、それら油圧アクチュエータ１３を作動させるための操縦レバー９が設けられている。操縦者が操縦レバー９を操作することで、作業用機械１の操縦を行うことができる。油圧アクチュエータ１３へ圧油を供給する油圧系１１には、油圧アクチュエータ１３への圧油供給を停止可能な油圧ロック機構１２が設けられている。
Hereinafter, a rotating mechanism 21 and a boarding/exiting barrier device 20 according to an embodiment of the present invention will be described with reference to the drawings.
1 is a diagram showing a state in which an entry/exit blocking device 20 is provided on a seat 7 of a working machine 1. The seat 7 on which an operator sits when operating the working machine 1 is provided on a floor 6 of a cab 2 of a working machine 1 such as a hydraulic excavator. The operator can enter and exit the cab 2 through a passage 8 of an entrance/exit 4. The working machine 1 is provided with a plurality of hydraulic actuators 13 and a control lever 9 for operating the hydraulic actuators 13. The operator can operate the working machine 1 by operating the control lever 9. A hydraulic system 11 that supplies pressure oil to the hydraulic actuators 13 is provided with a hydraulic lock mechanism 12 that can stop the supply of pressure oil to the hydraulic actuators 13.
乗降遮断装置２０は、作業用機械１の座席７に至る通路８の周囲に設けられる。図１に示す例では、乗降遮断装置２０は、カバー１０に覆われた状態で座席７の側部に設けられている。尚、乗降遮断装置２０に設けられる遮断棒１５及び操作レバー１６は、カバー１０の外部に突出している。後述するように、操縦者は、操作部としての操作レバー１６を操作して、遮断棒１５が通路８を遮断する遮断位置に配置される状態と、遮断棒１５が通路８から退避した退避位置に配置される状態とを切り替えることができる。 The boarding/alighting barrier device 20 is provided around the passage 8 leading to the seat 7 of the work machine 1. In the example shown in FIG. 1, the boarding/alighting barrier device 20 is provided on the side of the seat 7 while being covered by a cover 10. The barrier bar 15 and the operating lever 16 provided on the boarding/alighting barrier device 20 protrude outside the cover 10. As will be described later, the operator can operate the operating lever 16 as an operating part to switch between a state in which the barrier bar 15 is positioned in a blocking position that blocks the passage 8 and a state in which the barrier bar 15 is positioned in a retracted position retracted from the passage 8.
図２及び図３は、乗降遮断装置２０が備える回動機構２１の構成を示す図である。具体的には、図２は回動機構２１が第一姿勢にある状態を示し、図３は回動機構２１が第二姿勢にある状態を示す。図４は、回動機構２１の分解斜視図である。乗降遮断装置２０は、回動機構２１と、遮断棒１５と、操作レバー１６とを備える。回動機構２１は、基材２２と、基材２２に対して第一回動軸２５を中心にして回動可能に軸支される第一回動部材２９と、基材２２に対して第二回動軸２６を中心にして回動可能に軸支される第二回動部材３２と、付勢部材２８とを備える。 2 and 3 are diagrams showing the configuration of the pivot mechanism 21 provided in the boarding/alighting barrier device 20. Specifically, FIG. 2 shows the pivot mechanism 21 in a first position, and FIG. 3 shows the pivot mechanism 21 in a second position. FIG. 4 is an exploded perspective view of the pivot mechanism 21. The boarding/alighting barrier device 20 includes the pivot mechanism 21, a barrier bar 15, and an operating lever 16. The pivot mechanism 21 includes a base material 22, a first pivot member 29 pivotally supported relative to the base material 22 around a first pivot shaft 25, a second pivot member 32 pivotally supported relative to the base material 22 around a second pivot shaft 26, and a biasing member 28.
遮断棒１５は第一回動部材２９及び第二回動部材３２の一方に設けられ、操作レバー１６は第一回動部材２９及び第二回動部材３２の他方に設けられて、作業用機械１の操縦者に操作される。尚、本実施形態では、遮断棒１５が第二回動部材３２に設けられ、操作レバー１６が第一回動部材２９に設けられる例を示す。 The blocking bar 15 is provided on one of the first rotating member 29 and the second rotating member 32, and the operating lever 16 is provided on the other of the first rotating member 29 and the second rotating member 32, and is operated by the operator of the work machine 1. In this embodiment, an example is shown in which the blocking bar 15 is provided on the second rotating member 32, and the operating lever 16 is provided on the first rotating member 29.
図１及び図２に示すように、遮断棒１５は、操縦者が操作レバー１６を動かすことで第一回動部材２９及び第二回動部材３２が回動して第一姿勢にある場合に、作業用機械１の座席７に至る通路８に張り出してその通路８を遮断する遮断位置に位置する。その場合、遮断棒１５により、座席７に居る操縦者が座席７から離れることが阻止される。また、図１及び図３に示すように、遮断棒１５は、操縦者が操作レバー１６を動かすことで第一回動部材２９及び第二回動部材３２が回動して第二姿勢にある場合に、通路８から退避した退避位置に位置する。その場合、操縦者が座席７から離れることが許容される。 As shown in Figures 1 and 2, when the operator moves the control lever 16 to rotate the first rotating member 29 and the second rotating member 32 to a first position, the barrier bar 15 is positioned in a blocking position where it overhangs the passage 8 leading to the seat 7 of the work machine 1 and blocks the passage 8. In this case, the barrier bar 15 prevents the operator in the seat 7 from leaving the seat 7. Also, as shown in Figures 1 and 3, when the operator moves the control lever 16 to rotate the first rotating member 29 and the second rotating member 32 to a second position, the barrier bar 15 is positioned in a retracted position retracted from the passage 8. In this case, the operator is permitted to leave the seat 7.
基材２２及び第一回動部材２９及び第二回動部材３２は、例えば金属製の板状の部材を用いて形成される。基材２２の本体部２２ａの一方の面上には、第一回動軸２５及び第二回動軸２６が設けられる。第一回動部材２９が有する平坦な第一本体部２９ａには、その第一本体部２９ａを貫通する第一孔３０が設けられ、その第一孔３０に基材２２の第一回動軸２５が通された状態で、第一回動部材２９と基材２２とがプッシュナット４６及びワッシャ４７を用いて組み付けられる。その結果、第一回動部材２９が第一回動軸２５を中心にして基材２２に対して回転可能になる。同様に、第二回動部材３２には、その第二回動部材３２を貫通する第二孔４５が設けられ、その第二孔４５に基材２２の第二回動軸２６が通された状態で、第二回動部材３２と基材２２とがプッシュナット５１及びワッシャ５２を用いて組み付けられる。その結果、第二回動部材３２が第二回動軸２６を中心にして基材２２に対して回転可能になる。 The base material 22, the first rotating member 29, and the second rotating member 32 are formed, for example, using a plate-shaped member made of metal. A first rotating shaft 25 and a second rotating shaft 26 are provided on one surface of the main body portion 22a of the base material 22. A first hole 30 penetrating the first main body portion 29a of the first rotating member 29 is provided in the flat first main body portion 29a, and the first rotating member 29 and the base material 22 are assembled using a push nut 46 and a washer 47 with the first rotating shaft 25 of the base material 22 passing through the first hole 30. As a result, the first rotating member 29 becomes rotatable relative to the base material 22 around the first rotating shaft 25. Similarly, the second rotating member 32 is provided with a second hole 45 penetrating the second rotating member 32, and the second rotating shaft 26 of the base material 22 is passed through the second hole 45. The second rotating member 32 and the base material 22 are assembled using a push nut 51 and a washer 52. As a result, the second rotating member 32 becomes rotatable relative to the base material 22 around the second rotating shaft 26.
第一回動部材２９は、第一回動軸２５及び第一孔３０から離れた位置に設けられた嵌合軸３１を有する。嵌合軸３１は、第一回動部材２９の第一本体部２９ａの両面側、即ち、基材２２と相対する側及びそれとは反対側に突出する形状である。第二回動部材３２は遊嵌孔３３を有する。第一回動部材２９と第二回動部材３２とは、第一回動部材２９の嵌合軸３１が第二回動部材３２の遊嵌孔３３に嵌め込まれた状態で、第二回動部材３２が第一回動部材２９から離れないように止め輪４８及びワッシャ４９、５０を用いて組み付けられている。そして、第一回動部材２９の嵌合軸３１が第二回動部材３２の遊嵌孔３３内を相対的に移動しながら第一回動部材２９と第二回動部材３２とが連動して基材２２に対して回動することで、第一回動部材２９及び第二回動部材３２が、図１に示す第一姿勢と図２に示す第二姿勢との間で姿勢変化する。 The first rotating member 29 has an engagement shaft 31 provided at a position away from the first rotating shaft 25 and the first hole 30. The engagement shaft 31 is shaped to protrude from both sides of the first main body portion 29a of the first rotating member 29, i.e., the side facing the base material 22 and the opposite side. The second rotating member 32 has a loose fitting hole 33. The first rotating member 29 and the second rotating member 32 are assembled using a retaining ring 48 and washers 49, 50 so that the second rotating member 32 does not separate from the first rotating member 29 with the engagement shaft 31 of the first rotating member 29 fitted into the loose fitting hole 33 of the second rotating member 32. The first rotating member 29 and the second rotating member 32 rotate relative to the base material 22 while the fitting shaft 31 of the first rotating member 29 moves relatively within the loose fitting hole 33 of the second rotating member 32, and the first rotating member 29 and the second rotating member 32 change their positions between the first position shown in FIG. 1 and the second position shown in FIG. 2.
第一回動部材２９の形状について説明すると、本実施形態では、第一回動部材２９を構成する板状の部材のうち、第一孔３０が設けられる部位から見て一方の方向に延びた部分の先端に嵌合軸３１が設けられ、第一孔３０が設けられる部位から見て別の方向に延びた部分の先端に操作レバー１６が設けられる。そして、嵌合軸３１及び操作レバー１６が設けられる第一回動部材２９は、基材２２の第一回動軸２５が通される第一孔３０を中心にして基材２２に対して回転可能になる。 Regarding the shape of the first rotating member 29, in this embodiment, the first rotating member 29 is made of a plate-like member, and a fitting shaft 31 is provided at the tip of a portion that extends in one direction as viewed from the portion where the first hole 30 is provided, and an operating lever 16 is provided at the tip of a portion that extends in another direction as viewed from the portion where the first hole 30 is provided. The first rotating member 29 on which the fitting shaft 31 and operating lever 16 are provided is rotatable relative to the base material 22 around the first hole 30 through which the first rotating shaft 25 of the base material 22 passes.
同様に、第二回動部材３２の形状について説明すると、本実施形態では、第二回動部材３２の構成する板状の部材のうち、第二孔４５が設けられる部位から見て一方の方向に遊嵌孔３３が設けられ、第二孔４５が設けられる部位から見て別の方向に遮断棒１５が設けられる。そして、遊嵌孔３３及び遮断棒１５が設けられる第二回動部材３２は、基材２２の第二回動軸２６が通される第二孔４５を中心にして基材２２に対して回転可能になる。 Similarly, to explain the shape of the second rotating member 32, in this embodiment, the plate-shaped member constituting the second rotating member 32 has a loose-fitting hole 33 in one direction as viewed from the location where the second hole 45 is provided, and a blocking bar 15 in the other direction as viewed from the location where the second hole 45 is provided. The second rotating member 32 in which the loose-fitting hole 33 and the blocking bar 15 are provided is then rotatable relative to the base material 22 around the second hole 45 through which the second rotating shaft 26 of the base material 22 passes.
基材２２の本体部２２ａには、第一回動部材２９及び第二回動部材３２が第一姿勢であるか否かを検出する検出装置３９がねじ４３、４４を用いて取り付けられる。検出装置３９は、基材２２の本体部２２ａに対する第一回動部材２９の位置に基づいて、第一回動部材２９及び第二回動部材３２が第一姿勢であるか否かを検出し、その検出結果を配線４０を介して制御部１４に伝達する。配線４０は結束バンド４１を用いて基材２２に固定される。そして、制御部１４は、油圧ロック機構１２の動作を制御して、検出装置３９が第一姿勢であることを検出している場合にのみ、油圧アクチュエータ１３への圧油供給を行って、作業用機械１に設けられる油圧アクチュエータ１３の油圧系１１が作動状態にさせる。 A detection device 39 that detects whether the first rotating member 29 and the second rotating member 32 are in the first position is attached to the main body 22a of the substrate 22 using screws 43, 44. The detection device 39 detects whether the first rotating member 29 and the second rotating member 32 are in the first position based on the position of the first rotating member 29 relative to the main body 22a of the substrate 22, and transmits the detection result to the control unit 14 via wiring 40. The wiring 40 is fixed to the substrate 22 using a cable tie 41. The control unit 14 controls the operation of the hydraulic lock mechanism 12 to supply pressure oil to the hydraulic actuator 13 only when the detection device 39 detects that the substrate 22 is in the first position, thereby operating the hydraulic system 11 of the hydraulic actuator 13 provided in the work machine 1.
このように、乗降遮断装置２０は、遮断棒１５が通路８を遮断する遮断位置に配置される状態にある場合にのみ、油圧アクチュエータ１３の油圧系１１が作動状態となる。具体的に説明すると、乗降遮断装置２０は、検出装置３９が、第一回動部材２９及び第二回動部材３２が第一姿勢であることを検出している場合にのみ、即ち、遮断棒１５が通路８を遮断する遮断位置に位置している場合にのみ、油圧アクチュエータ１３への圧油供給を行うことで、作業用機械１に設けられる油圧アクチュエータ１３の油圧系１１を作動状態にさせる。それに対して、乗降遮断装置２０は、検出装置３９が、第一回動部材２９及び第二回動部材３２が第一姿勢であることを検出していない場合、例えば、遮断棒１５が遮断位置に位置しておらず、操縦者が座席７から離れている場合などには、油圧アクチュエータ１３への圧油供給を停止することで、作業用機械１に設けられる油圧アクチュエータ１３の油圧系１１を作動状態にさせない。 In this way, the boarding/alighting cutoff device 20 activates the hydraulic system 11 of the hydraulic actuator 13 only when the cutoff rod 15 is in a cutoff position that cuts off the passage 8. To be more specific, the boarding/alighting cutoff device 20 activates the hydraulic system 11 of the hydraulic actuator 13 provided on the work machine 1 by supplying pressurized oil to the hydraulic actuator 13 only when the detection device 39 detects that the first rotating member 29 and the second rotating member 32 are in the first position, i.e., only when the cutoff rod 15 is in a cutoff position that cuts off the passage 8. On the other hand, when the detection device 39 does not detect that the first rotating member 29 and the second rotating member 32 are in the first position, for example, when the cutoff rod 15 is not in the cutoff position and the operator is away from the seat 7, the boarding/alighting cutoff device 20 stops the supply of pressurized oil to the hydraulic actuator 13, thereby not activating the hydraulic system 11 of the hydraulic actuator 13 provided on the work machine 1.
つまり、油圧アクチュエータ１３の油圧系１１が作動状態になっている間は、通路８を遮断棒１５で遮断することで操縦者が座席７から離れないようにし、通路８が遮断棒１５に遮断されていないことで操縦者が座席７から離れることが許容される間は、油圧アクチュエータ１３の油圧系１１が作動状態にならないようにできる。 In other words, while the hydraulic system 11 of the hydraulic actuator 13 is in an activated state, the passage 8 is blocked by the blocking rod 15 to prevent the pilot from leaving the seat 7, and while the passage 8 is not blocked by the blocking rod 15 and the pilot is allowed to leave the seat 7, the hydraulic system 11 of the hydraulic actuator 13 cannot be activated.
第一回動部材２９及び第二回動部材３２が配置されるのと同じ側の基材２２の一方の面上には、付勢部材支持部２７が設けられる。そして、付勢部材支持部２７と第一回動部材２９の嵌合軸３１とを連結する付勢部材２８が設けられる。付勢部材２８は、弾性変形可能な細長い板状の部材を用いて構成される。付勢部材２８の両端は折り曲げられてＵ字型になっている。付勢部材２８は、一方の端部のＵ字部分が付勢部材支持部２７に巻き付く形態で、付勢部材支持部２７を中心に回転可能な状態で基材２２に装着される。また、付勢部材２８は、他方の端部のＵ字部分が嵌合軸３１に巻き付く形態で、嵌合軸３１を中心に回転可能な状態で第一回動部材２９に装着される。 A biasing member support portion 27 is provided on one surface of the base material 22 on the same side as the first rotating member 29 and the second rotating member 32. A biasing member 28 is provided to connect the biasing member support portion 27 and the fitting shaft 31 of the first rotating member 29. The biasing member 28 is formed using an elastically deformable elongated plate-like member. Both ends of the biasing member 28 are bent to form a U-shape. The biasing member 28 is attached to the base material 22 in a state in which the U-shaped portion of one end is wrapped around the biasing member support portion 27 and is rotatable around the fitting shaft 31. The biasing member 28 is attached to the first rotating member 29 in a state in which the U-shaped portion of the other end is wrapped around the fitting shaft 31 and is rotatable around the fitting shaft 31.
付勢部材２８は、その弾性力により、第一回動部材２９及び第二回動部材３２を、第一姿勢と第二姿勢との間の中間姿勢から第一姿勢と第二姿勢とのそれぞれに向かう側に付勢する。例えば、付勢部材２８は、第一回動部材２９及び第二回動部材３２が回動して第一姿勢に近い姿勢にある場合には、その弾性力により、第一回動部材２９及び第二回動部材３２が第一姿勢になるように付勢する。また、付勢部材２８は、第一回動部材２９及び第二回動部材３２が回動して第二姿勢に近い姿勢にある場合には、その弾性力により、第一回動部材２９及び第二回動部材３２が第二姿勢になるように付勢する。つまり、操縦者が、第一回動部材２９及び第二回動部材３２が、図２に示す第一姿勢と図３に示す第二姿勢との間の中間姿勢にある状態で操作レバー１６の操作を止めたとしても、付勢部材２８の付勢力によって、第一回動部材２９及び第二回動部材３２は第一姿勢又は第二姿勢の何れか一方になる。そして、操縦者が操作レバー１６を操作して第一回動部材２９及び第二回動部材３２を第一姿勢又は第二姿勢にさせると、その後は、振動などによって第一回動部材２９及び第二回動部材３２が勝手に回動することが防止される。そして、第一回動部材２９及び第二回動部材３２が第一姿勢から勝手に回動することを防止できるため、上述したような検出装置３９の構成において、作業用機械１の使用中に誤って油圧アクチュエータ１３の油圧系１１が非作動状態になることを回避できる。 The biasing member 28 biases the first rotating member 29 and the second rotating member 32 from an intermediate position between the first position and the second position toward the first position and the second position, respectively, by its elastic force. For example, when the first rotating member 29 and the second rotating member 32 have rotated to a position close to the first position, the biasing member 28 biases the first rotating member 29 and the second rotating member 32 to the first position by its elastic force. Also, when the first rotating member 29 and the second rotating member 32 have rotated to a position close to the second position, the biasing member 28 biases the first rotating member 29 and the second rotating member 32 to the second position by its elastic force. In other words, even if the operator stops operating the operating lever 16 when the first rotating member 29 and the second rotating member 32 are in an intermediate position between the first position shown in FIG. 2 and the second position shown in FIG. 3, the first rotating member 29 and the second rotating member 32 will be in either the first position or the second position due to the biasing force of the biasing member 28. Then, when the operator operates the operating lever 16 to place the first rotating member 29 and the second rotating member 32 in the first position or the second position, the first rotating member 29 and the second rotating member 32 are prevented from rotating independently due to vibration or the like. And, since the first rotating member 29 and the second rotating member 32 can be prevented from rotating independently from the first position, in the configuration of the detection device 39 as described above, it is possible to avoid the hydraulic system 11 of the hydraulic actuator 13 being in an inoperative state by mistake while the working machine 1 is in use.
第一回動部材２９及び第二回動部材３２が配置されるのと同じ側の基材２２の一方の面上には、板ばね支持部２３が設けられる。図５は、板ばね支持部２３に設けられる板ばね部材３４の形状を説明する図である。板ばね支持部２３は、基材２２の本体部２２ａの面から垂直に立ち上がった形状になっている。板ばね部材３４は、一枚の板状部材を用いて形成される。板ばね部材３４は、基材２２の本体部２２ａに固定される固定部３５と、固定部３５から第一方向Ｄ１に延出すると共に先端が自由端とされた第一延出部３７と、固定部３５から第一方向Ｄ１とは反対側を向く第二方向Ｄ２に延出すると共に先端が自由端とされた第二延出部３８とを備える。固定部３５には貫通孔３６が設けられ、ねじ４２が貫通孔３６を通って板ばね支持部２３のねじ孔２４に固定されることで、板ばね部材３４の固定部３５の面と板ばね支持部２３の面とが相対した状態で、板ばね部材３４が板ばね支持部２３に固定される。図５に示す例では、第一方向Ｄ１と第二方向Ｄ２とのなす角は１８０°になっている。尚、第一方向Ｄ１と第二方向Ｄ２とは図示するような１８０°の関係でなくても良く、おおよそ反対側を向いていれば良い。例えば、第一方向Ｄ１と第二方向Ｄ２とのなす角が１２０°から２４０°の範囲であればよい。 A leaf spring support portion 23 is provided on one surface of the base material 22 on the same side as the first rotating member 29 and the second rotating member 32. FIG. 5 is a diagram explaining the shape of the leaf spring member 34 provided on the leaf spring support portion 23. The leaf spring support portion 23 is shaped to rise vertically from the surface of the main body portion 22a of the base material 22. The leaf spring member 34 is formed using a single plate-shaped member. The leaf spring member 34 includes a fixed portion 35 fixed to the main body portion 22a of the base material 22, a first extension portion 37 extending from the fixed portion 35 in the first direction D1 and having a free end at its tip, and a second extension portion 38 extending from the fixed portion 35 in the second direction D2 facing the opposite side to the first direction D1 and having a free end at its tip. The fixing portion 35 has a through hole 36, and the screw 42 passes through the through hole 36 and is fixed to the screw hole 24 of the leaf spring support portion 23, so that the leaf spring member 34 is fixed to the leaf spring support portion 23 with the surface of the fixing portion 35 of the leaf spring member 34 facing the surface of the leaf spring support portion 23. In the example shown in FIG. 5, the angle between the first direction D1 and the second direction D2 is 180°. Note that the first direction D1 and the second direction D2 do not have to have a 180° relationship as shown in the figure, and may be approximately opposite directions. For example, the angle between the first direction D1 and the second direction D2 may be in the range of 120° to 240°.
第一方向Ｄ１及び第二方向Ｄ２と直交する方向での板ばね部材３４の幅は一様ではない。例えば、第一延出部３７の幅Ｗ３は固定部３５の幅Ｗ１と同じであるが、第二延出部３８の幅Ｗ２は、Ｗ１及びＷ３よりも狭い。 The width of the leaf spring member 34 in the direction perpendicular to the first direction D1 and the second direction D2 is not uniform. For example, the width W3 of the first extension portion 37 is the same as the width W1 of the fixed portion 35, but the width W2 of the second extension portion 38 is narrower than W1 and W3.
第一延出部３７に第一規制部３７ａが設けられ、第二延出部３８に第二規制部３８ａが設けられる。板ばね部材３４が備える第一延出部３７は先端が自由端とされているため、第一延出部３７に設けられる第一規制部３７ａは弾性変形可能な状態で位置を変えることができる。同様に、板ばね部材３４が備える第二延出部３８は先端が自由端とされているため、第二延出部３８に設けられる第二規制部３８ａは弾性変形可能な状態で位置を変えることができる。このように、弾性変形可能な第一規制部３７ａ及び第二規制部３８ａが基材２２に設けられる。 A first restricting portion 37a is provided on the first extending portion 37, and a second restricting portion 38a is provided on the second extending portion 38. Since the tip of the first extending portion 37 provided on the leaf spring member 34 is a free end, the first restricting portion 37a provided on the first extending portion 37 can be changed in position in an elastically deformable state. Similarly, since the tip of the second extending portion 38 provided on the leaf spring member 34 is a free end, the second restricting portion 38a provided on the second extending portion 38 can be changed in position in an elastically deformable state. In this way, the elastically deformable first restricting portion 37a and second restricting portion 38a are provided on the base material 22.
第一規制部３７ａ及び第二規制部３８ａは、第一回動部材２９及び第二回動部材３２の少なくとも何れか一つが直接的又は間接的に押し当てられる位置に配置される。そして、第一規制部３７ａには、第一回動部材２９及び第二回動部材３２が第一姿勢である場合に、付勢部材２８の付勢力によって第一回動部材２９及び第二回動部材３２の少なくとも何れか一つが直接的又は間接的に押し当てられる。また、第一規制部３７ａ及び第二規制部３８ａは、付勢部材２８の付勢力によって第一回動部材２９及び第二回動部材３２の少なくとも何れか一つが直接的又は間接的に押し当てられる方向である押当て方向に沿って弾性変形可能に構成されている。そして、第二規制部３８ａには、第一回動部材２９及び第二回動部材３２が第二姿勢である場合に、付勢部材２８の付勢力によって第一回動部材２９及び第二回動部材３２の少なくとも何れか一つが直接的又は間接的に押し当てられる。 The first and second restricting portions 37a and 38a are disposed at positions where at least one of the first and second rotating members 29 and 32 is pressed directly or indirectly against the first restricting portion 37a. When the first and second rotating members 29 and 32 are in the first position, at least one of the first and second rotating members 29 and 32 is pressed directly or indirectly against the first restricting portion 37a by the biasing force of the biasing member 28. The first and second restricting portions 37a and 38a are configured to be elastically deformable along a pressing direction in which at least one of the first and second rotating members 29 and 32 is pressed directly or indirectly against the first and second restricting portions 37a and 38a by the biasing force of the biasing member 28. When the first rotating member 29 and the second rotating member 32 are in the second position, at least one of the first rotating member 29 and the second rotating member 32 is pressed directly or indirectly against the second restricting portion 38a by the biasing force of the biasing member 28.
第一規制部３７ａは上記押当て方向に沿って弾性変形可能な板状に形成されているため、第一回動部材２９及び第二回動部材３２が回動して第一姿勢にある場合、第一回動部材２９及び第二回動部材３２の少なくとも何れか一つは、板ばね部材３４の一部である第一規制部３７ａの板面に直接的又は間接的に当たる。つまり、第一規制部３７ａは、広い領域で、第一回動部材２９及び第二回動部材３２の少なくとも何れか一つを直接的又は間接的に確実に受けて、衝撃を緩和できる。 Since the first regulating portion 37a is formed in a plate shape that is elastically deformable along the pressing direction, when the first rotating member 29 and the second rotating member 32 rotate to the first position, at least one of the first rotating member 29 and the second rotating member 32 directly or indirectly contacts the plate surface of the first regulating portion 37a, which is part of the leaf spring member 34. In other words, the first regulating portion 37a can directly or indirectly receive at least one of the first rotating member 29 and the second rotating member 32 over a wide area, thereby mitigating the impact.
同様に、第二規制部３８ａは上記押当て方向に沿って弾性変形可能な板状に形成されているため、第一回動部材２９及び第二回動部材３２が回動して第二姿勢にある場合、第一回動部材２９及び第二回動部材３２の少なくとも何れか一つは、板ばね部材３４の一部である第二規制部３８ａの板面に直接的又は間接的に当たる。つまり、第二規制部３８ａは、広い領域で、第一回動部材２９及び第二回動部材３２の少なくとも何れか一つを直接的又は間接的に確実に受けて、衝撃を緩和できる。 Similarly, since the second regulating portion 38a is formed in a plate shape that is elastically deformable along the pressing direction, when the first rotating member 29 and the second rotating member 32 rotate to the second position, at least one of the first rotating member 29 and the second rotating member 32 directly or indirectly contacts the plate surface of the second regulating portion 38a, which is part of the leaf spring member 34. In other words, the second regulating portion 38a can reliably receive at least one of the first rotating member 29 and the second rotating member 32 directly or indirectly over a wide area, thereby mitigating the impact.
図６は、回動機構２１が第一姿勢にある状態での板ばね部材３４を拡大した図である。基材２２の本体部２２ａから離れる方向に向かって、第一回動部材２９と第二回動部材３２とが順に位置している。また、板ばね部材３４が板ばね支持部２３に取り付けられた状態では、板ばね部材３４の第一規制部３７ａの幅Ｗ３は、第二回動部材３２が位置している範囲まで広がっている。その結果、回動機構２１が第一姿勢にある場合、付勢部材２８によって第二回動部材３２が、幅Ｗ３を有する板ばね部材３４の第一規制部３７ａに直接的に押し当てられている。 Figure 6 is an enlarged view of the leaf spring member 34 when the pivot mechanism 21 is in the first position. The first pivot member 29 and the second pivot member 32 are positioned in that order away from the main body 22a of the substrate 22. When the leaf spring member 34 is attached to the leaf spring support 23, the width W3 of the first restricting portion 37a of the leaf spring member 34 is expanded to the range in which the second pivot member 32 is positioned. As a result, when the pivot mechanism 21 is in the first position, the biasing member 28 presses the second pivot member 32 directly against the first restricting portion 37a of the leaf spring member 34, which has the width W3.
第一規制部３７ａは上記押当て方向に沿って弾性変形可能に構成されているため、第一回動部材２９及び第二回動部材３２が回動して第一姿勢にある場合、第二回動部材３２の端部は、付勢部材２８によって第一規制部３７ａを上記押当て方向に沿って弾性変形させながら第一規制部３７ａに直接的に当たる。これにより、第一回動部材２９及び第二回動部材３２の回動が規制される。更に、第一回動部材２９及び第二回動部材３２が回動して第一姿勢で停止する際に付勢部材２８によって第一回動部材２９及び第二回動部材３２に加わる衝撃が、第一規制部３７ａの弾性変形により緩和される。そのため、第一回動部材２９及び第二回動部材３２の強度を必要以上に高めることなく耐久性を確保できる。加えて、第一回動部材２９及び第二回動部材３２に加わる衝撃が第一規制部３７ａで緩和されるため、振動などによって第一回動部材２９及び第二回動部材３２が第一姿勢から勝手に回動することを防止するために、付勢部材２８による付勢力を大きくすることができる。加えて、第一規制部３７ａが弾性変形可能なため、第二回動部材３２が第一規制部３７ａに当たる際の音が比較的小さくなる。 Because the first regulating portion 37a is configured to be elastically deformable along the pressing direction, when the first rotating member 29 and the second rotating member 32 rotate to the first position, the end of the second rotating member 32 directly contacts the first regulating portion 37a while the biasing member 28 elastically deforms the first regulating portion 37a along the pressing direction. This restricts the rotation of the first rotating member 29 and the second rotating member 32. Furthermore, when the first rotating member 29 and the second rotating member 32 rotate and stop in the first position, the impact applied to the first rotating member 29 and the second rotating member 32 by the biasing member 28 is mitigated by the elastic deformation of the first regulating portion 37a. Therefore, durability can be ensured without increasing the strength of the first rotating member 29 and the second rotating member 32 more than necessary. In addition, because the impact applied to the first rotating member 29 and the second rotating member 32 is mitigated by the first restricting portion 37a, the biasing force of the biasing member 28 can be increased to prevent the first rotating member 29 and the second rotating member 32 from rotating on their own from the first position due to vibration or the like. In addition, because the first restricting portion 37a is elastically deformable, the sound when the second rotating member 32 hits the first restricting portion 37a is relatively small.
図７は、回動機構２１が第二姿勢にある状態での板ばね部材３４を拡大した図である。基材２２の本体部２２ａから離れる方向に向かって、第一回動部材２９の嵌合軸３１に巻き付く付勢部材２８と、第一回動部材２９の第一本体部２９ａと、第二回動部材３２とが順に位置している。また、板ばね部材３４が板ばね支持部２３に取り付けられた状態では、板ばね部材３４の第二規制部３８ａの幅Ｗ２は、第一回動部材２９の嵌合軸３１に巻き付く付勢部材２８が位置している範囲まで広がっているが、第一回動部材２９の第一本体部２９ａ及び第二回動部材３２が位置している範囲までは広がっていない。その結果、回動機構２１が第二姿勢にある場合、第一回動部材２９の嵌合軸３１に巻き付く付勢部材２８が幅Ｗ２を有する第二規制部３８ａに押し当てられる。つまり、付勢部材２８によって、第一回動部材２９が、幅Ｗ２を有する第二規制部３８ａに間接的に（即ち、付勢部材２８を間に介して）押し当てられている。 7 is an enlarged view of the leaf spring member 34 when the rotating mechanism 21 is in the second position. The biasing member 28 wound around the fitting shaft 31 of the first rotating member 29, the first body portion 29a of the first rotating member 29, and the second rotating member 32 are located in this order in the direction away from the body portion 22a of the substrate 22. In addition, when the leaf spring member 34 is attached to the leaf spring support portion 23, the width W2 of the second regulating portion 38a of the leaf spring member 34 is expanded to the range where the biasing member 28 wound around the fitting shaft 31 of the first rotating member 29 is located, but is not expanded to the range where the first body portion 29a of the first rotating member 29 and the second rotating member 32 are located. As a result, when the rotating mechanism 21 is in the second position, the biasing member 28 wound around the fitting shaft 31 of the first rotating member 29 is pressed against the second regulating portion 38a having the width W2. In other words, the first rotating member 29 is indirectly (i.e., via the biasing member 28) pressed against the second restricting portion 38a having a width W2 by the biasing member 28.
第二規制部３８ａは上記押当て方向に沿って弾性変形可能に構成されているため、第一回動部材２９及び第二回動部材３２が回動して第二姿勢にある場合、第一回動部材２９は、付勢部材２８によって第二規制部３８ａを上記押当て方向に沿って弾性変形させながら第二規制部３８ａに間接的に当たる。これにより、第一回動部材２９及び第二回動部材３２の回動が規制される。更に、第一回動部材２９及び第二回動部材３２が回動して第二姿勢で停止する際に付勢部材２８によって第一回動部材２９及び第二回動部材３２に加わる衝撃が、第二規制部３８ａの弾性変形により緩和される。そのため、第一回動部材２９及び第二回動部材３２の強度を必要以上に高めることなく耐久性を確保できる。加えて、第一回動部材２９及び第二回動部材３２に加わる衝撃が第二規制部３８ａで緩和されるため、振動などによって第一回動部材２９及び第二回動部材３２が第二姿勢から勝手に回動することを防止するために、付勢部材２８による付勢力を大きくすることができる。加えて、第二規制部３８ａが弾性変形可能なため、付勢部材２８が第二規制部３８ａに当たる際の音が比較的小さくなる。 Because the second regulating portion 38a is configured to be elastically deformable along the pressing direction, when the first rotating member 29 and the second rotating member 32 rotate to the second position, the first rotating member 29 indirectly hits the second regulating portion 38a while elastically deforming the second regulating portion 38a along the pressing direction by the biasing member 28. This restricts the rotation of the first rotating member 29 and the second rotating member 32. Furthermore, when the first rotating member 29 and the second rotating member 32 rotate and stop in the second position, the impact applied to the first rotating member 29 and the second rotating member 32 by the biasing member 28 is mitigated by the elastic deformation of the second regulating portion 38a. Therefore, durability can be ensured without increasing the strength of the first rotating member 29 and the second rotating member 32 more than necessary. In addition, because the impact applied to the first rotating member 29 and the second rotating member 32 is mitigated by the second restricting portion 38a, the biasing force of the biasing member 28 can be increased to prevent the first rotating member 29 and the second rotating member 32 from rotating on their own from the second position due to vibration or the like. In addition, because the second restricting portion 38a is elastically deformable, the sound made when the biasing member 28 hits the second restricting portion 38a is relatively small.
＜別実施形態＞
＜１＞
上記実施形態では、付勢部材２８が弾性変形可能な板状の部材を用いて形成される例を説明したが、付勢部材２８の材質及び形状は適宜変更可能である。例えば弾性変形可能なスプリング等を用いて付勢部材２８を形成してもよい。
<Another embodiment>
＜1＞
In the above embodiment, an example has been described in which the urging member 28 is formed using an elastically deformable plate-shaped member, but the material and shape of the urging member 28 can be appropriately changed. For example, the urging member 28 may be formed using an elastically deformable spring or the like.
＜２＞
上記実施形態では、第一規制部３７ａ及び第二規制部３８ａが板ばね部材３４を用いて実現される例を説明したが、第一規制部３７ａ及び第二規制部３８ａの材質及び形状は適宜変更可能である。例えば、ゴム、樹脂などの弾性変形可能な部材を板ばね支持部２３に固定することで第一規制部３７ａ及び第二規制部３８ａを形成してもよい。
＜2＞
In the above embodiment, an example has been described in which the first and second restricting portions 37a, 38a are realized using the leaf spring member 34, but the material and shape of the first and second restricting portions 37a, 38a can be changed as appropriate. For example, the first and second restricting portions 37a, 38a may be formed by fixing an elastically deformable member such as rubber or resin to the leaf spring support portion 23.
＜３＞
上記実施形態では、第一規制部３７ａ及び第二規制部３８ａが一つの板ばね部材３４を用いて実現される例を説明したが、第一規制部３７ａ及び第二規制部３８ａのそれぞれが別の部材を用いて形成されてもよい。
また、第一規制部３７ａ及び第二規制部３８ａのそれぞれが基材２２のどの位置に設けられるのかは適宜変更可能である。その際も、第一回動部材２９及び第二回動部材３２が第一姿勢である場合には、付勢部材２８の付勢力によって第一回動部材２９及び第二回動部材３２の少なくとも何れか一つが第一規制部３７ａに対して直接的又は間接的に押し当てられ、第一回動部材２９及び第二回動部材３２が第二姿勢である場合には、付勢部材２８の付勢力によって第一回動部材２９及び第二回動部材３２の少なくとも何れか一つが第二規制部３８ａに対して直接的又は間接的に押し当てられる。
＜3＞
In the above embodiment, an example was described in which the first regulating portion 37a and the second regulating portion 38a are realized using a single leaf spring member 34, but each of the first regulating portion 37a and the second regulating portion 38a may be formed using a separate member.
In addition, it is possible to appropriately change the positions on the substrate 22 where the first regulating portion 37a and the second regulating portion 38a are provided. In this case, when the first rotating member 29 and the second rotating member 32 are in the first position, at least one of the first rotating member 29 and the second rotating member 32 is directly or indirectly pressed against the first regulating portion 37a by the biasing force of the biasing member 28, and when the first rotating member 29 and the second rotating member 32 are in the second position, at least one of the first rotating member 29 and the second rotating member 32 is directly or indirectly pressed against the second regulating portion 38a by the biasing force of the biasing member 28.
＜４＞
上記実施形態では、第一規制部３７ａ及び第二規制部３８ａの両方が、付勢部材２８の付勢力によって第一回動部材２９及び第二回動部材３２の少なくとも何れか一つが直接的又は間接的に押し当てられる方向である押当て方向に沿って弾性変形可能に構成されている場合について説明したが、第一規制部３７ａ及び第二規制部３８ａの少なくとも一方がそのように弾性変形可能に構成されていればよい。
＜4＞
In the above embodiment, a case has been described in which both the first regulating portion 37a and the second regulating portion 38a are configured to be elastically deformable along the pressing direction, which is the direction in which at least one of the first pivoting member 29 and the second pivoting member 32 is pressed directly or indirectly by the biasing force of the biasing member 28. However, it is sufficient if at least one of the first regulating portion 37a and the second regulating portion 38a is configured to be elastically deformable in this manner.
＜５＞
上記実施形態では、第一回動部材２９及び第二回動部材３２が第一姿勢であることを検出装置３９が検出している場合にのみ作業用機械１に設けられる油圧アクチュエータ１３の油圧系１１が作動状態となる場合について説明したが、第一回動部材２９及び第二回動部材３２がどのような姿勢にあるかを示す情報と、油圧アクチュエータ１３の油圧系１１が作動状態及び非作動状態の何れになるかとを連動させなくてもよい。
＜5＞
In the above embodiment, a case has been described in which the hydraulic system 11 of the hydraulic actuator 13 provided on the work machine 1 is activated only when the detection device 39 detects that the first rotating member 29 and the second rotating member 32 are in the first position, but it is not necessary to link the information indicating the position in which the first rotating member 29 and the second rotating member 32 are, with whether the hydraulic system 11 of the hydraulic actuator 13 is in an activated state or a non-activated state.
＜６＞
上記実施形態では、板ばね部材３４の第二延出部３８に設けられる第二規制部３８ａの幅Ｗ２を狭く形成することで、第二規制部３８ａが第一回動部材２９の第一本体部２９ａ及び第二回動部材３２には当たらないようにした例を説明したが、第一規制部３７ａ及び第二規制部３８ａの形状は適宜変更可能である。つまり、第一規制部３７ａ及び第二規制部３８ａをどの部材に当てるかに応じてそれらの形状を設定すればよい。
＜6＞
In the above embodiment, an example has been described in which the width W2 of the second restricting portion 38a provided on the second extending portion 38 of the leaf spring member 34 is narrowed so that the second restricting portion 38a does not come into contact with the first main body portion 29a of the first rotating member 29 and the second rotating member 32, but the shapes of the first restricting portion 37a and the second restricting portion 38a can be changed as appropriate. In other words, the shapes of the first restricting portion 37a and the second restricting portion 38a may be set depending on which member the first restricting portion 37a and the second restricting portion 38a are to come into contact with.
＜７＞
上記実施形態において、操作レバー１６は、第一回動部材２９と一体で形成されてもよいし、第一回動部材２９と別体で形成された後で第一回動部材２９に装着されてもよい。
上記実施形態において、遮断棒１５は、第二回動部材３２と一体で形成されてもよいし、第二回動部材３２と別体で形成された後で第二回動部材３２に装着されてもよい。
＜７＞
In the above embodiment, the operating lever 16 may be formed integrally with the first rotating member 29 , or may be formed separately from the first rotating member 29 and then attached to the first rotating member 29 .
In the above embodiment, the blocking bar 15 may be formed integrally with the second rotating member 32 , or may be formed separately from the second rotating member 32 and then attached to the second rotating member 32 .
＜８＞
尚、上記実施形態（別実施形態を含む、以下同じ）で開示される構成は、矛盾が生じない限り、他の実施形態で開示される構成と組み合わせて適用でき、また、本明細書において開示された実施形態は例示であって、本発明の実施形態はこれに限定されず、本発明の目的を逸脱しない範囲内で適宜改変できる。
＜8＞
Furthermore, the configurations disclosed in the above embodiments (including other embodiments, the same applies below) can be applied in combination with configurations disclosed in other embodiments, unless a contradiction arises. Furthermore, the embodiments disclosed in this specification are illustrative, and the embodiments of the present invention are not limited thereto, and can be appropriately modified within the scope that does not deviate from the purpose of the present invention.
本発明は、第一回動部材及び第二回動部材が意図せずに姿勢変化することを防ぎながら、第一回動部材及び第二回動部材に加わる衝撃を和らげることができる回動機構及びそれを備えた乗降遮断装置に利用できる。 The present invention can be used in a rotation mechanism that can reduce the impact on the first and second rotating members while preventing the first and second rotating members from unintentionally changing their positions, and in a boarding/alighting barrier device equipped with the same.
１ ：作業用機械
７ ：座席
８ ：通路
１１ ：油圧系
１３ ：油圧アクチュエータ
１５ ：遮断棒
１６ ：操作レバー（操作部）
２０ ：乗降遮断装置
２１ ：回動機構
２２ ：基材
２２ａ ：本体部
２５ ：第一回動軸
２６ ：第二回動軸
２８ ：付勢部材
２９ ：第一回動部材
３１ ：嵌合軸
３２ ：第二回動部材
３３ ：遊嵌孔
３４ ：板ばね部材
３５ ：固定部
３７ ：第一延出部
３７ａ ：第一規制部
３８ ：第二延出部
３８ａ ：第二規制部
３９ ：検出装置
Ｄ１ ：第一方向
Ｄ２ ：第二方向
1: Working machine 7: Seat 8: Passage 11: Hydraulic system 13: Hydraulic actuator 15: Shutoff bar 16: Operation lever (operation part)
20: Boarding/alighting barrier device 21: Rotation mechanism 22: Base material 22a: Main body 25: First rotation shaft 26: Second rotation shaft 28: Urging member 29: First rotation member 31: Fitting shaft 32: Second rotation member 33: Loose fitting hole 34: Leaf spring member 35: Fixing portion 37: First extension portion 37a: First regulating portion 38: Second extension portion 38a: Second regulating portion 39: Detection device D1: First direction D2: Second direction
Claims (5)
前記基材に対して第一回動軸を中心にして回動可能に軸支される第一回動部材と、
前記基材に対して第二回動軸を中心にして回動可能に軸支される第二回動部材と、
付勢部材と、を備え、
前記第一回動部材は前記第一回動軸から離れた位置に設けられた嵌合軸を有し、前記第二回動部材は前記嵌合軸が嵌め込まれた遊嵌孔を有し、
前記嵌合軸が前記遊嵌孔内を移動しながら前記第一回動部材と前記第二回動部材とが連動して前記基材に対して回動することで、前記第一回動部材及び前記第二回動部材が第一姿勢と第二姿勢とに姿勢変化する回動機構であって、
前記付勢部材は、前記第一回動部材及び前記第二回動部材を、前記第一姿勢と前記第二姿勢との間の中間姿勢から前記第一姿勢と前記第二姿勢とのそれぞれに向かう側に付勢するように構成され、
前記基材には、前記第一回動部材及び前記第二回動部材が前記第一姿勢である場合に、前記付勢部材の付勢力によって前記第一回動部材及び前記第二回動部材の少なくとも何れか一つが直接的又は間接的に押し当てられる第一規制部と、前記第一回動部材及び前記第二回動部材が前記第二姿勢である場合に、前記付勢部材の付勢力によって前記第一回動部材及び前記第二回動部材の少なくとも何れか一つが直接的又は間接的に押し当てられる第二規制部とが設けられ、
前記第一規制部及び前記第二規制部の少なくとも一方は、前記付勢部材の付勢力によって前記第一回動部材及び前記第二回動部材の少なくとも何れか一つが直接的又は間接的に押し当てられる方向である押当て方向に沿って弾性変形可能に構成されている回動機構。 A substrate;
A first rotating member that is rotatably supported around a first rotating shaft relative to the base material;
A second rotating member supported rotatably about a second rotating axis relative to the base material;
A biasing member,
The first rotating member has a fitting shaft provided at a position separated from the first rotating shaft, and the second rotating member has a loose fitting hole into which the fitting shaft is fitted,
a rotation mechanism in which the first rotation member and the second rotation member are rotated relative to the base material in an interlocking manner while the fitting shaft moves within the loose fitting hole, thereby changing the position of the first rotation member and the second rotation member between a first position and a second position,
the biasing member is configured to bias the first rotation member and the second rotation member from an intermediate position between the first position and the second position toward each of the first position and the second position,
the base material is provided with a first regulating portion against which at least one of the first rotating member and the second rotating member is directly or indirectly pressed by the biasing force of the biasing member when the first rotating member and the second rotating member are in the first position, and a second regulating portion against which at least one of the first rotating member and the second rotating member is directly or indirectly pressed by the biasing force of the biasing member when the first rotating member and the second rotating member are in the second position,
A rotation mechanism in which at least one of the first regulating portion and the second regulating portion is configured to be elastically deformable along a pressing direction, which is a direction in which at least one of the first rotating member and the second rotating member is pressed directly or indirectly by the biasing force of the biasing member.
前記板ばね部材は、前記基材の本体部に固定される固定部と、前記固定部から第一方向に延出すると共に先端が自由端とされた第一延出部と、前記固定部から前記第一方向とは反対側を向く第二方向に延出すると共に先端が自由端とされた第二延出部と、を備え、
前記第一延出部に前記第一規制部が設けられ、前記第二延出部に前記第二規制部が設けられている請求項１又は２に記載の回動機構。 The plate spring member is formed using a single plate-shaped member,
The leaf spring member includes a fixed portion fixed to a main body portion of the base material, a first extending portion extending from the fixed portion in a first direction and having a free tip, and a second extending portion extending from the fixed portion in a second direction facing an opposite side to the first direction and having a free tip,
The rotation mechanism according to claim 1 or 2, wherein the first restricting portion is provided on the first extending portion, and the second restricting portion is provided on the second extending portion.
請求項１～３の何れか一項に記載の回動機構と、
前記第一回動部材及び前記第二回動部材の一方に設けられた遮断棒と、
前記第一回動部材及び前記第二回動部材の他方に設けられ、前記作業用機械の操縦者に操作される操作部と、
前記第一回動部材及び前記第二回動部材が前記第一姿勢である場合に、前記遮断棒は前記通路に張り出して前記通路を遮断する遮断位置に配置され、
前記第一回動部材及び前記第二回動部材が前記第二姿勢である場合に、前記遮断棒は前記通路から退避した退避位置に配置される乗降遮断装置。 A boarding/alighting barrier device provided around an aisle leading to a seat of a work machine,
A rotation mechanism according to any one of claims 1 to 3;
a blocking bar provided on one of the first rotating member and the second rotating member;
an operating unit provided on the other of the first rotating member and the second rotating member and operated by an operator of the working machine;
When the first rotating member and the second rotating member are in the first position, the blocking bar is disposed at a blocking position where it projects into the passage and blocks the passage,
An entry/exit barrier device in which, when the first pivoting member and the second pivoting member are in the second position, the barrier bar is positioned in a retracted position retracted from the passage.
前記検出装置が前記第一姿勢であることを検出している場合にのみ、前記作業用機械に設けられる油圧アクチュエータの油圧系が作動状態となる請求項４に記載の乗降遮断装置。 a detection device attached to the base material and detecting whether the first rotation member and the second rotation member are in the first position;
5. The entry/exit barrier device according to claim 4, wherein a hydraulic system of a hydraulic actuator provided in the working machine is brought into an operating state only when the detection device detects that the working machine is in the first position.
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| US20040099461A1 (en) | 2002-11-27 | 2004-05-27 | Miiller Kevin J. | Lateral operator restraint system and position sensor for material handler |
| JP2009068280A (en) | 2007-09-14 | 2009-04-02 | Caterpillar Japan Ltd | Working lever mount jump-up device for working machine |
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| JPS611542A (en) * | 1984-06-12 | 1986-01-07 | Handoothe- Kogyo Kk | Automatic accelerator device in excavator |
| JP2682817B2 (en) * | 1995-07-12 | 1997-11-26 | 新キャタピラー三菱株式会社 | Operation breaker for construction machinery |
| JP3342620B2 (en) * | 1995-10-30 | 2002-11-11 | アスベル株式会社 | Trash can |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20040099461A1 (en) | 2002-11-27 | 2004-05-27 | Miiller Kevin J. | Lateral operator restraint system and position sensor for material handler |
| JP2009068280A (en) | 2007-09-14 | 2009-04-02 | Caterpillar Japan Ltd | Working lever mount jump-up device for working machine |
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