JP5468854B2 - Construction machinery - Google Patents

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JP5468854B2
JP5468854B2 JP2009209518A JP2009209518A JP5468854B2 JP 5468854 B2 JP5468854 B2 JP 5468854B2 JP 2009209518 A JP2009209518 A JP 2009209518A JP 2009209518 A JP2009209518 A JP 2009209518A JP 5468854 B2 JP5468854 B2 JP 5468854B2
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handrail
construction machine
cover
swing body
column
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JP2011058267A (en
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裕之 西野
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キャタピラー エス エー アール エル
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Description

本発明は、建設機械、さらに詳しくは、油圧ショベルのような上部旋回体を備える建設機械の上部旋回体に設置される手摺手段に関する。   The present invention relates to a construction machine, and more particularly, to a handrail means installed on an upper swing body of a construction machine including an upper swing body such as a hydraulic excavator.

建設機械の代表例である油圧ショベルは、下部走行体の上に、旋回自在に取り付けられた上部旋回体を備え、上部旋回体には、運転室、エンジン室、作業腕装置などが取り付けられている（例えば、特許文献１参照）。   A hydraulic excavator, which is a typical example of a construction machine, includes an upper swing body that is pivotably mounted on a lower traveling body, and a driver's cab, an engine room, a work arm device, and the like are mounted on the upper swing body. (For example, refer to Patent Document 1).

上部旋回体のエンジン室の上面は平坦なデッキ状に形成され、エンジン室の中には、エンジン、ラジエータ、燃料タンク、作動油タンク、制御機器などの多くの機器が収容されている。平坦なデッキ部には、これらの機器類の保守・点検・整備のための、開閉自在なエンジンフード、カバーなどが備えられている。作業者は、必要に応じて、エンジン室の上面に上って、エンジンフード、カバー等を開けて、保守・点検・整備などの作業を行なう。   The upper surface of the engine chamber of the upper swing body is formed in a flat deck shape, and many devices such as an engine, a radiator, a fuel tank, a hydraulic oil tank, and a control device are accommodated in the engine chamber. The flat deck is equipped with an openable engine hood and cover for maintenance, inspection and maintenance of these devices. If necessary, the worker goes up to the upper surface of the engine room and opens the engine hood, cover, etc., and performs maintenance, inspection, maintenance, and the like.

特開２００３−３５２２号公報（図５）Japanese Patent Laying-Open No. 2003-3522 (FIG. 5)

上述したとおりの形態の建設機械には、次のとおりの解決すべき課題がある。   The construction machine of the form as described above has the following problems to be solved.

すなわち、上部旋回体のデッキ状の上面に作業者が上って、例えばエンジンフードを開けてエンジンのメンテナンスを行う場合、デッキの上面は、地上より比較的高位置にあるので、作業者にとっては、エンジン室上面の周縁に手摺の設置されているのが望ましい。   That is, when an operator goes up to the deck-shaped upper surface of the upper revolving structure and performs engine maintenance by opening the engine hood, for example, the upper surface of the deck is relatively higher than the ground. It is desirable that a handrail is installed on the periphery of the upper surface of the engine compartment.

しかしながら、この種の形態の建設機械は、上部旋回体を旋回させて作業を行うことが多いので、上部旋回体の上に設置した手摺のような突起物は、旋回時に周囲の構造物、障害物等と干渉し損傷されやすい。また、突起物を設置した場合、建設機械の運転者はそれが周囲の構造物、障害物などと干渉しないように、常に注意しながらの運転が必要になり作業の能率が阻害される。   However, since this type of construction machine often performs work by turning the upper revolving structure, protrusions such as handrails installed on the upper revolving structure are not suitable for surrounding structures and obstacles. Interfering with things etc., easily damaged. In addition, when a protrusion is installed, the operator of the construction machine needs to operate with caution so that it does not interfere with surrounding structures, obstacles, etc., which hinders work efficiency.

本発明は上記事実に鑑みてなされたもので、その技術的課題は、建設機械の上部旋回体のデッキ状の上面に作業者が上がって保守・点検・整備等の作業を行う場合に利用することができ、かつ建設機械の運転時に周囲の構造物、障害物などとの干渉に気をつかう必要のない手摺手段を備えた、建設機械を提供することである。   The present invention has been made in view of the above facts, and its technical problem is utilized when an operator goes up to the deck-like upper surface of the upper revolving structure of a construction machine and performs work such as maintenance, inspection, and maintenance. It is an object of the present invention to provide a construction machine having handrail means that can be used and does not need to be aware of interference with surrounding structures and obstacles during operation of the construction machine.

本発明によれば、上記の技術的課題を解決する建設機械として、下部走行体と、下部走行体上に旋回自在に取付けられた上部旋回体と、上部旋回体の上面に設置される手摺手段と、を備え、該手摺手段が、上部旋回体の上方に向けて立設される「手摺位置」およびこの立設状態を解除する「手摺解除位置」に変更可能に備えられている建設機械において、上部旋回体が開閉自在なカバーを備え、このカバーを上方に開放することにより、カバーが「手摺位置」に位置した該手摺手段として機能し、閉じることにより「手摺解除位置」として機能する、ことを特徴とする建設機械が提供される。 According to the present invention, as a construction machine that solves the above technical problem, a lower traveling body, an upper revolving body that is pivotably mounted on the lower traveling body, and a handrail means installed on the upper surface of the upper revolving body In the construction machine, the handrail means is provided so as to be changeable to a “handrail position” standing toward the upper side of the upper swing body and a “handrail release position” for releasing the standing state . The upper revolving body is provided with a cover that can be opened and closed, and when the cover is opened upward, the cover functions as the handrail means located at the “handrail position”, and when the cover is closed, it functions as the “handrail release position”. A construction machine is provided.

本発明に従って構成された建設機械は、上部旋回体の上面に設置される手摺手段が、上部旋回体の上方に向けて立設される「手摺位置」およびこの立設状態を解除する「手摺解除位置」に変更可能に備えられている。   In the construction machine configured in accordance with the present invention, the handrail means installed on the upper surface of the upper swing body has a “handrail position” that stands up above the upper swing body and the “handrail release” that releases this standing state. "Position" can be changed.

したがって、建設機械の上部旋回体のデッキ状の上面に、作業者が上がって保守・点検・整備等の作業を行う場合には、この手摺手段を立設した「手摺位置」にして利用することができ、かつ建設機械の運転作業時には立設状態を解除した「手摺解除位置」にして周囲の構造物、障害物などとの干渉に気をつかう必要のないようにすることができる。   Therefore, when an operator goes up to the deck-like upper surface of the upper revolving structure of a construction machine and performs work such as maintenance, inspection, and maintenance, this handrail means should be used in the “handrail position” where it is erected. In addition, when the construction machine is in operation, the “handrail release position” where the standing state is released can be set so that it is not necessary to pay attention to interference with surrounding structures and obstacles.

本発明に従って構成された図２に示す実施例の手摺手段を備えた、建設機械の代表例である油圧ショベルの側面図。The side view of the hydraulic shovel which is a typical example of a construction machine provided with the handrail means of the Example shown in FIG. 2 comprised according to this invention. （ａ）図１の矢印Ａ斜め方向から見た拡大斜視図で「出入柱式」の手摺手段を備えた図、（ｂ）要部拡大図。(A) The figure provided with the handrail means of the "entrance / exit pillar type" by the expansion perspective view seen from the arrow A diagonal direction of FIG. 1, (b) The principal part enlarged view. （ａ）図１の矢印Ａ斜め方向から見た拡大斜視図で「出入柱式」の手摺手段の変形例を備えた図、（ｂ）要部拡大図。(A) The figure provided with the modification of the handrail means of the "entrance / exit pillar type" by the expansion perspective view seen from the arrow A diagonal direction of FIG. 1, (b) The principal part enlarged view. （ａ）図１の矢印Ａ斜め方向から見た拡大斜視図で「倒立柱式」の手摺手段を備えた図、（ｂ）「手摺位置」の要部拡大図、（ｃ）「手摺解除位置」の要部拡大図。(A) An enlarged perspective view seen from the direction of the arrow A in FIG. 1 and provided with “inverted column type” handrail means, (b) an enlarged view of the main part of “handrail position”, and (c) “handrail release position” The main part enlarged view of "." （ａ）図１の矢印Ａ斜め方向から見た拡大斜視図で「開閉カバー式」の手摺手段を備えた図、（ｂ）要部拡大図。(A) The figure provided with the handrail means of "opening-closing cover type" by the expansion perspective view seen from the arrow A diagonal direction of FIG. 1, (b) The principal part enlarged view. （ａ）図１の矢印Ａ斜め方向から見た拡大斜視図で「挿脱式」の手摺手段を備えた図、（ｂ）要部拡大図、（ｃ）立設解除状態の図。(A) The figure provided with the handrail means of "insertion / detachment type" by the expansion perspective view seen from the arrow A diagonal direction of FIG. 1, (b) The principal part enlarged view, (c) The figure of the standing release state.

以下、本発明に従って構成された建設機械について、代表的な建設機械である油圧ショベルにおける好適実施形態を図示している添付図面を参照して、さらに詳細に説明する。   Hereinafter, a construction machine constructed according to the present invention will be described in more detail with reference to the accompanying drawings illustrating a preferred embodiment of a hydraulic excavator which is a typical construction machine.

図１を参照して油圧ショベルについて説明する。油圧ショベル２は、下部走行体４と、下部走行体４上に鉛直に延びる軸線５を中心に旋回自在に取付けられた上部旋回体６を備えている。上部旋回体６には、運転室８、エンジン室１０、作業腕装置１２などが取り付けられている。   The hydraulic excavator will be described with reference to FIG. The hydraulic excavator 2 includes a lower traveling body 4 and an upper revolving body 6 attached to the lower traveling body 4 so as to be rotatable about an axis 5 extending vertically. A driver's cab 8, an engine compartment 10, a work arm device 12, and the like are attached to the upper swing body 6.

エンジン室１０の中には、エンジン、ラジエータ、燃料タンク、作動油タンク、制御機器などの多くの機器が収容され、上面Ｆは略矩形の（例えば図２参照）平坦なデッキ状に形成されている。上面Ｆには、エンジン室１０内の機器類の保守・点検・整備のための、開閉自在な、エンジンフード１４が備えられている。   The engine room 10 accommodates many devices such as an engine, a radiator, a fuel tank, a hydraulic oil tank, and a control device, and an upper surface F is formed in a substantially rectangular (for example, see FIG. 2) flat deck shape. Yes. On the upper surface F, an openable and closable engine hood 14 is provided for maintenance / inspection / maintenance of equipment in the engine compartment 10.

エンジン室１０の上面Ｆには、後に詳述する手摺手段、図１においては手摺手段１６が上部旋回体６の上方に向けて矢印ＵＰ方向に動かして立設される「手摺位置」（実線で示す）およびこの立設状態を矢印ＤＷＮ方向に動かして解除した「手摺解除位置」（二点鎖線で示す）に変更可能に備えられている。   On the upper surface F of the engine compartment 10, a handrail means, which will be described in detail later, in FIG. 1, a handrail position 16 (indicated by a solid line) is erected by moving upward in the direction of the arrow UP toward the upper swing body 6. And the standing state is moved in the direction of arrow DWN and can be changed to a “handrail release position” (indicated by a two-dot chain line).

図２を参照して「出入柱式」の手摺手段１６について説明する。手摺手段１６は、上部旋回体６のエンジン室１０の上面Ｆの周縁に出し入れ自在に挿入された複数個（実施例は４個）の出入柱１８を備えている。出入柱１８は、鋼管によって形成され、上部旋回体６内に備えられた鉛直に延び上面Ｆに開口した鋼管２０内に摺動自在に挿入されている。一対の出入柱１８，１８の上端部同士は、連結部材２２である角鋼棒が溶接されて一体に連結されている。   The “in / out column type” handrail means 16 will be described with reference to FIG. The handrail means 16 includes a plurality of (four in the embodiment) entrance / exit pillars 18 that are inserted into the periphery of the upper surface F of the engine chamber 10 of the upper swing body 6 so as to be freely inserted and removed. The entrance / exit column 18 is formed of a steel pipe, and is slidably inserted into a steel pipe 20 that extends vertically and is open to the upper surface F provided in the upper swing body 6. The upper ends of the pair of entrance / exit pillars 18 and 18 are integrally connected to each other by welding a square steel bar as the connecting member 22.

出入柱１８は、矢印ＵＰ方向に引き出されて、図２（ａ）（ｂ）に実線で示す「手摺位置」に位置付けられ、出入柱１８に設けた横断方向に延びるピン穴１９にピン２４を挿通させることにより「手摺位置」に保持されている。ピン２４は上部旋回体６の鋼管２０の近くのブラケット２６にワイヤ２７によって連結保持されている。出入柱１８を、ピン２４を外し、鋼管２０の中に、連結部材２２が上面Ｆに当接するまで（二点鎖線で示す）矢印ＤＷＮ方向に押し込むことにより、手摺手段１６は、「手摺解除位置」に位置付けられる。   The entrance / exit column 18 is pulled out in the direction of the arrow UP, and is positioned at a “handrail position” indicated by a solid line in FIGS. 2 (a) and 2 (b). By being inserted, it is held at the “handrail position”. The pin 24 is connected and held by a wire 27 to a bracket 26 near the steel pipe 20 of the upper swing body 6. By pushing the entrance / exit pillar 18 in the direction of arrow DWN (indicated by a two-dot chain line) until the connecting member 22 comes into contact with the upper surface F, the pin 24 is removed and the handrail means 16 is moved to the “handrail release position”. ”.

連結部材２２は、一対の出入柱１８，１８を連結しているが、出入柱１８を３個以上同時に連結するようにしてもよい。上部旋回体６の大きさ、形態などによって、手摺として出入柱１８のみでよい場合は、連結部材２２を備えなくてもよい。   The connecting member 22 connects the pair of entrance / exit pillars 18, 18, but three or more entrance / exit pillars 18 may be connected simultaneously. When only the entrance / exit pillar 18 is required as a handrail depending on the size and form of the upper swing body 6, the connecting member 22 may not be provided.

図３を参照して「出入柱式」の変形例である手摺手段２８について説明する。手摺手段２８は、前述の手摺手段１６（図２）の連結部材２２に代えて、一対の出入柱の少なくとも一方の出入柱３０の上端部が、他方の出入柱３２の上端部に連結自在なキャンバス製のベルト３４を備えている。出入柱３０の先端部にはベルト３４を弾性的に巻取り収納する収納部３０ａを備え、出入柱３２にはベルト３４の先端金具３４ａを引っ掛け保持するフック３２ａを備えている。   With reference to FIG. 3, the handrail means 28 which is a modified example of the "entrance / exit pillar type" will be described. In the handrail means 28, instead of the connecting member 22 of the handrail means 16 (FIG. 2) described above, the upper end portion of at least one input / output column 30 of the pair of input / output columns can be connected to the upper end portion of the other input / output column 32. A canvas belt 34 is provided. A storage portion 30 a that elastically winds and stores the belt 34 is provided at the distal end portion of the entrance / exit post 30, and a hook 32 a that hooks and holds the end fitting 34 a of the belt 34 is provided at the entrance / exit post 32.

出入柱３０，３２は、ベルト３４による連結を外し、収納部３０ａおよびフック３２ａが上面Ｆに当接するまで（二点鎖線で示す）矢印ＤＷＮ方向に押し込むことにより「手摺解除位置」に位置付けられる。 And out pillars 30 and 32, remove the connection by belts 34 is positioned "handrail release position" by accommodating portion 30a and the hook 32a until it comes into contact with the top surface F (indicated by the two-dot chain line) is pushed in the arrow DWN direction .

一対の出入柱３０，３２を連結するベルト３４に代えて、ワイヤを用いてもよい。 Instead of the belts 34 which connects the pair of and out pillars 30 and 32, it may be used wire.

図４を参照して「倒立柱式」の手摺手段３６について説明する。手摺手段３６は、上部旋回体６の周縁の上面Ｆに設けられた複数（実施例では４個）のブラケット３８それぞれに、立て倒し自在に取り付けられた倒立柱４０を備えている。倒立柱４０は、ブラケット３８に取り付けられる下端部に両側に突出したピン４２を備えている。ブラケット３８は倒立柱４０の下端部を挟む二又状に形成され、二又部分それぞれにピン４２が摺動移動自在な鉛直に延びる長穴３９を備えている。   The "inverted column type" handrail means 36 will be described with reference to FIG. The handrail means 36 includes an inverted column 40 attached to each of a plurality of (four in the embodiment) brackets 38 provided on the upper surface F of the periphery of the upper swing body 6 so as to be tilted up and down. The inverted column 40 includes pins 42 protruding on both sides at the lower end attached to the bracket 38. The bracket 38 is formed in a bifurcated shape sandwiching the lower end portion of the inverted column 40, and is provided with an elongated hole 39 extending vertically so that the pin 42 is slidably movable.

倒立柱４０は、倒立柱４０を手で持ってそのピン４２をブラケット３８の長穴３９内を移動させ、矢印ＵＰ方向に立てられた「手摺位置」（図３（ａ）（ｂ））、および矢印ＤＷＮ方向に倒された「手摺解除位置」（図３（ｃ））に、倒立自在に変更される。   The inverted column 40 holds the inverted column 40 by hand, and moves the pin 42 in the long hole 39 of the bracket 38, so that the “handrail position” (FIGS. 3A and 3B) is set up in the arrow UP direction. And it is changed to the “handrail release position” (FIG. 3C) that is tilted in the direction of the arrow DWN so that it can be inverted.

図５を参照して「開閉カバー式」の手摺手段４４について説明する。手摺手段４４は、上部旋回体６の側面に備えた開閉自在な複数のカバー４６（実施例では４個）をそれぞれ矢印ＵＰで示す上方に開放し、カバー４６に備えたステー４８によって上面Ｆに保持することにより、カバー４６が「手摺位置」に位置した手摺手段４４として機能する。   The “open / close cover type” handrail means 44 will be described with reference to FIG. The handrail means 44 opens a plurality of freely openable and closable covers 46 (four in the embodiment) provided on the side surface of the upper swing body 6 to the upper surface F by a stay 48 provided on the cover 46. By holding, the cover 46 functions as the handrail means 44 positioned at the “handrail position”.

カバー４６は、上部旋回体６のエンジン室１０の左右側面にそれぞれ２個、上端部をヒンジ４７によって開閉自在に取り付けられている。ステー４８は、丸棒材の両端を折り曲げて形成され、一端がカバー４６の裏面に回動自在に固定され、他端はカバー４６を上方に開放したときに上面Ｆのブラケット５０に差し込み固定される。   Two covers 46 are attached to the left and right side surfaces of the engine compartment 10 of the upper swing body 6, respectively, and the upper end portion is attached to be freely opened and closed by a hinge 47. The stay 48 is formed by bending both ends of a round bar, one end is rotatably fixed to the back surface of the cover 46, and the other end is inserted and fixed to the bracket 50 on the upper surface F when the cover 46 is opened upward. The

ステー４８とブラケット５０の連結を外し、カバー４６をエンジン室１０の左右側面に矢印ＤＷＮで示す方向に戻すことにより「手摺位置」に位置したカバー４６は「手摺解除位置」になる。   When the stay 48 and the bracket 50 are disconnected and the cover 46 is returned to the left and right side surfaces of the engine chamber 10 in the direction indicated by the arrow DWN, the cover 46 positioned at the “handrail position” becomes the “handrail release position”.

なお、カバーを上下にスライド開閉するように構成して、上方にスライドさせて「手摺位置」に、下方にスライドさせて閉じ「手摺解除位置」としてもよい。   The cover may be configured to open and close up and down, and may be slid upward to a “handrail position” and slid downward to a “handrail release position”.

図６を参照して「脱着式」の手摺手段５２について説明する。手摺手段５２は、上部旋回体６の上面Ｆの周縁に設けられた複数個（実施例は４個）の鉛直に延びた挿入穴５４に挿脱自在に取り付けられる、少なくとも一対の柱５６、５６を連結部材５８によって連結した脱着柱６０を備えている。   The “removable” handrail means 52 will be described with reference to FIG. The handrail means 52 is at least a pair of columns 56, 56 that are removably attached to a plurality (four in the embodiment) of vertically extending insertion holes 54 provided on the periphery of the upper surface F of the upper swing body 6. And a detachable column 60 connected to each other by a connecting member 58.

柱５６は鋼管によって、連結柱５８は角鋼棒によって形成され、柱５６の上端部および連結柱５８の両端部はピン６２によって互に屈曲を自在に連結されている。柱５６の下端部は挿入穴５４に挿入される軸部６４を備えている。柱５６と連結部材５８の屈曲関係を直角にして軸部６４を挿入穴５４に挿入することにより「手摺位置」が形成される。   The column 56 is formed of a steel pipe, and the connection column 58 is formed of a square steel bar. The upper end portion of the column 56 and both ends of the connection column 58 are connected to each other by pins 62 so as to be freely bent. The lower end portion of the column 56 includes a shaft portion 64 that is inserted into the insertion hole 54. A “handrail position” is formed by inserting the shaft portion 64 into the insertion hole 54 with the column 56 and the connecting member 58 bent at a right angle.

軸部６４を挿入穴５４から抜き出し外すことにより「手摺解除位置」となり、抜き出した脱着柱６０は、柱５６と連結部材５８を、ピン６２を中心に折り曲げて（図６（ｃ））たたみ、上部旋回体６内に収納される。   By removing the shaft portion 64 from the insertion hole 54, it becomes a “handrail release position”. The extracted demountable column 60 is obtained by folding the column 56 and the connecting member 58 around the pin 62 (FIG. 6C), It is stored in the upper swing body 6.

上述したとおりの建設機械の作用について説明する。   The operation of the construction machine as described above will be described.

建設機械２は、上部旋回体６の上面Ｆに設置される手摺手段、例えば手摺手段１６が、上部旋回体６の上方に向けて立設される「手摺位置」およびこの立設状態を解除する「手摺解除位置」に変更可能に備えられている。   The construction machine 2 releases the “handrail position” in which the handrail means installed on the upper surface F of the upper swing body 6, for example, the handrail means 16 erected toward the upper side of the upper swing body 6, and this standing state. It can be changed to “handrail release position”.

したがって、建設機械２の上部旋回体６のデッキ状の上面Ｆに、作業者が上がって保守・点検・整備等の作業を行う場合には、この手摺手段を立設した「手摺位置」にして利用することができ、かつ建設機械２の運転作業時には、立設状態を解除した「手摺解除位置」にして周囲の構造物、障害物などとの干渉に気をつかう必要のないようにすることができる。   Therefore, when an operator goes up to the deck-like upper surface F of the upper swing body 6 of the construction machine 2 and performs work such as maintenance, inspection, and maintenance, the handrail means is set to the “handrail position” where the handrail is erected. It can be used, and when operating the construction machine 2, it is not necessary to be aware of interference with surrounding structures and obstacles by setting the "handrail release position" where the standing state is released. Can do.

２：油圧ショベル（建設機械）
４：下部走行体
６：上部旋回体
１６：手摺手段
１８：出入柱
２２：連結部材
２８：手摺手段
３４：ベルト
３６：手摺手段
４０：倒立柱
４４：手摺手段
４６：カバー
５２：手摺手段
６０：挿脱柱
Ｆ：上面 2: Excavator (construction machine)
4: Lower traveling body 6: Upper turning body 16: Handrail means 18: Entrance / exit post 22: Connection member 28: Handrail means 34: Belt 36: Handrail means 40: Inverted pillar 44: Handrail means 46: Cover 52: Handrail means 60: Insertion column F: Upper surface

Claims (1)

下部走行体と、
下部走行体上に旋回自在に取付けられた上部旋回体と、
上部旋回体の上面に設置される手摺手段と、を備え、
該手摺手段が、
上部旋回体の上方に向けて立設される「手摺位置」およびこの立設状態を解除する「手
摺解除位置」に変更可能に備えられている建設機械において、
上部旋回体が開閉自在なカバーを備え、
このカバーを上方に開放することにより、カバーが「手摺位置」に位置した該手摺手段
として機能し、閉じることにより「手摺解除位置」として機能する、
ことを特徴とする建設機械。 A lower traveling body,
An upper swinging body pivotably mounted on the lower traveling body,
Handrail means installed on the upper surface of the upper swing body,
The handrail means is
In a construction machine provided to be able to be changed to a `` handrail position '' standing up above the upper swing body and a `` handrail release position '' for releasing this standing state ,
The upper revolving unit has a cover that can be freely opened and closed.
The handrail means in which the cover is located at the “handrail position” by opening the cover upward.
Functions as a "handrail release position" by closing
Construction machinery characterized by that.
JP2009209518A 2009-09-10 2009-09-10 Construction machinery Expired - Fee Related JP5468854B2 (en)

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JP6002616B2 (en) * 2013-04-03 2016-10-05 日立建機株式会社 Handrail for construction machinery
JP6419591B2 (en) * 2015-01-22 2018-11-07 住友建機株式会社 Excavator
JP6430267B2 (en) * 2015-01-22 2018-11-28 住友建機株式会社 Excavator
JP6576659B2 (en) * 2015-03-20 2019-09-18 住友建機株式会社 Small swivel excavator
JP2020159038A (en) * 2019-03-26 2020-10-01 コベルコ建機株式会社 Handrail structure of construction machine

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JPS585801Y2 (en) * 1978-09-05 1983-02-01 鹿島建設株式会社 Temporary walkway or stair railing
JPS5752698U (en) * 1980-09-11 1982-03-26
JPH0423931Y2 (en) * 1984-12-20 1992-06-04
JPH07257434A (en) * 1994-03-23 1995-10-09 Yutani Heavy Ind Ltd Opening holding device for vertically opening/closing type cover
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