JP2009197445A

JP2009197445A - Construction machine

Info

Publication number: JP2009197445A
Application number: JP2008038781A
Authority: JP
Inventors: Hajime Okano; 一岡野
Original assignee: Hitachi Construction Machinery Co Ltd
Current assignee: Hitachi Construction Machinery Co Ltd
Priority date: 2008-02-20
Filing date: 2008-02-20
Publication date: 2009-09-03

Abstract

PROBLEM TO BE SOLVED: To enhance working efficiency when a floor member serving as a scaffold during the inspection is installed on an upper structure. SOLUTION: A plurality of temporary fixing bolts 28 are vertically installed in the outer surface 19A of a cab support frame 19 separately from respective screw seats 20. A plurality of temporary fixing holes 29 are formed in a left front floor member 21 separately from respective bolt insertion holes 21G. Each temporary fixing bolt 29 of the left front floor member 21 is engaged with each temporary fixing bolt 28 of the cab support frame 19. Therefore, the left front floor member 21 can be held by the temporary fixing bolts 28 vertically installed in the cab support frame 19, and temporarily fixed stably to the cab support frame 19. Consequently, the bolt insertion holes 21G of the left front floor member 21 and the screw seats 20 of the cab support frame 19 can be accurately positioned, and the working efficiency when the left front floor member 21 is installed using floor mounting bolts 25 can be enhanced. COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、例えば油圧ショベル、油圧クレーンの建設機械に関し、特に、上部旋回体の外側面に点検作業用の足場となるフロア部材が設けられた建設機械に関する。 The present invention relates to a construction machine such as a hydraulic excavator or a hydraulic crane, and more particularly to a construction machine in which a floor member serving as a scaffold for inspection work is provided on an outer surface of an upper swing body.

一般に、油圧ショベル等の建設機械は、自走可能な下部走行体と、該下部走行体上に旋回可能に搭載された上部旋回体と、該上部旋回体の前部側に俯仰動可能に設けられた作業装置とにより大略構成され、作業装置によって土砂の掘削作業等を行うものである。 In general, a construction machine such as a hydraulic excavator is provided with a self-propelled lower traveling body, an upper revolving body that is turnably mounted on the lower traveling body, and an upside-down movable structure on the front side of the upper revolving body. The work device is generally configured, and the work device performs excavation work of earth and sand.

ここで、比較的大型の油圧ショベルには、通常、上部旋回体の外側面にキャットウォーク等と呼ばれるフロア部材が配設され、上部旋回体に搭載されたエンジン、油圧機器等の搭載機器に対する点検作業を行うときには、作業者は、フロア部材上を歩行するようになっている（例えば、特許文献１参照）。 Here, a relatively large hydraulic excavator is usually provided with a floor member called a catwalk or the like on the outer surface of the upper swing body, and inspections for mounted equipment such as an engine and hydraulic equipment mounted on the upper swing body are performed. When working, the worker walks on the floor member (see, for example, Patent Document 1).

実開平５−３２４５１号公報Japanese Utility Model Publication No. 5-32451

この従来技術による油圧ショベルは、上部旋回体のベースとなる旋回フレームの外側面に複数のボルト孔を設け、油圧クレーン等を用いて旋回フレームの側方にフロア部材（キャットウォーク）を吊下げた状態で、このフロア部材と旋回フレームのボルト孔とにボルトを挿通することにより、旋回フレームの外側面にフロア部材（キャットウォーク）を取付ける構成となっている。 In this conventional hydraulic excavator, a plurality of bolt holes are provided on the outer surface of the revolving frame that is the base of the upper revolving structure, and a floor member (catwalk) is suspended to the side of the revolving frame using a hydraulic crane or the like. In this state, the floor member (catwalk) is attached to the outer surface of the swivel frame by inserting a bolt through the floor member and the bolt hole of the swivel frame.

しかし、上述した従来技術においては、油圧クレーン等によってフロア部材を吊下げて保持した状態で、このフロア部材をボルトによって旋回フレームに締結する構成となっている。このため、フロア部材に設けられたボルト孔と、旋回フレームに設けられたボルト孔との微妙な位置合わせが難しく、この位置合わせに多大な時間を費やすことにより、旋回フレームにフロア部材を取付けるときの作業性が低下してしまうという問題がある。 However, in the above-described conventional technology, the floor member is fastened to the revolving frame with bolts while the floor member is suspended and held by a hydraulic crane or the like. For this reason, it is difficult to delicately align the bolt holes provided in the floor member and the bolt holes provided in the swivel frame, and when a floor member is attached to the swivel frame by spending a lot of time for this alignment. There is a problem that the workability of the system is lowered.

また、旋回フレームにフロア部材を取付けるときに、作業者は、油圧クレーン等によって吊下げたフロア部材の下方にもぐり込んだ状態で、フロア部材と旋回フレームとをボルトを用いて締結する作業を行うことになる。このため、作業者は、その頭上に宙吊り状態に保持されたフロア部材によって不安感を感じ、フロア部材の取付時の作業性が低下してしまうという問題がある。 In addition, when the floor member is attached to the swing frame, the operator must perform the work of fastening the floor member and the swing frame with bolts while being recessed below the floor member suspended by a hydraulic crane or the like. become. For this reason, the worker feels anxiety due to the floor member held in a suspended state above the head, and there is a problem that workability at the time of mounting the floor member is lowered.

本発明は上述した従来技術の問題に鑑みなされたもので、点検作業時の足場となるフロア部材を上部旋回体に取付けるときの作業性を高めることができるようにした建設機械を提供することを目的としている。 The present invention has been made in view of the above-described problems of the prior art, and provides a construction machine capable of improving workability when a floor member serving as a scaffold during inspection work is attached to an upper swing body. It is aimed.

上述した課題を解決するため、本発明は、自走可能な下部走行体と、該下部走行体上に旋回可能に搭載された上部旋回体と、該上部旋回体の外側面に締結具を用いて着脱可能に取付けられ前記上部旋回体の点検作業を行うときの足場を形成するフロア部材とを備えてなる建設機械に適用される。 In order to solve the above-described problems, the present invention uses a self-propelled lower traveling body, an upper revolving body that is turnably mounted on the lower traveling body, and a fastener on an outer surface of the upper revolving body. And a floor member that is removably attached and forms a scaffold when the upper revolving structure is inspected.

そして、請求項１の発明が採用する構成の特徴は、前記上部旋回体の外側面と前記フロア部材との間には、前記締結具とは異なる位置で前記フロア部材を前記上部旋回体に対して仮止めする仮止め機構を設けたことにある。 A feature of the configuration adopted by the invention of claim 1 is that the floor member is placed on the upper swing body at a position different from the fastener between the outer surface of the upper swing body and the floor member. This is because a temporary fixing mechanism for temporarily fixing is provided.

請求項２の発明は、前記上部旋回体の外側面には前記締結具が取付られる取付孔を設け、前記フロア部材のうち前記上部旋回体の外側面と対向する面には前記締結具が挿通される挿通孔を設け、前記仮止め機構は、前記取付孔と離間して前記上部旋回体の外側面に突設された仮止め突起と、前記フロア部材のうち前記挿通孔と離間して前記上部旋回体の外側面と対向する面に設けられ、前記仮止め突起に係合することにより前記フロア部材を仮止めすると共に前記挿通孔と前記取付孔とを位置合わせする仮止め孔とにより構成したことにある。 According to a second aspect of the present invention, an attachment hole to which the fastener is attached is provided on an outer surface of the upper swing body, and the fastener is inserted into a surface of the floor member that faces the outer surface of the upper swing body. The temporary fixing mechanism is spaced apart from the mounting hole and protruded from the outer surface of the upper swing body, and the floor member is spaced apart from the insertion hole and It is provided on a surface facing the outer surface of the upper swing body, and includes a temporary fixing hole that temporarily fixes the floor member by engaging with the temporary fixing protrusion and aligns the insertion hole and the mounting hole. It is to have done.

請求項１の発明によれば、上部旋回体の外側面とフロア部材との間に、両者を締結する締結具とは異なる位置に仮止め機構を設けたので、上部旋回体の外側面に締結具を用いてフロア部材を取付ける前段階で、仮止め機構を用いて、フロア部材を上部旋回体に対して仮止めすることができる。従って、例えばフロア部材を油圧クレーン等によって吊下げて保持する場合に比較して、フロア部材を上部旋回体に対し、仮止め機構によって安定した状態に保持しておくことができる。 According to the first aspect of the present invention, since the temporary fixing mechanism is provided between the outer surface of the upper swing body and the floor member at a position different from the fastener for fastening both, the upper swing body is fastened to the outer surface of the upper swing body. The floor member can be temporarily fixed to the upper swing body using the temporary fixing mechanism at the stage before the floor member is attached using the tool. Therefore, for example, compared with the case where the floor member is suspended and held by a hydraulic crane or the like, the floor member can be held in a stable state by the temporary fixing mechanism with respect to the upper swing body.

この結果、締結具を用いてフロア部材を上部旋回体の外側面に取付けるときに、両者の取付位置の位置合わせを正確に行うことができ、その取付作業の作業性を高めることができる。また、作業者は、仮止め機構によって安定した状態に保持されたフロア部材の下方で、安心感をもって締結具を用いた取付作業を行うことができるので、その作業性を一層高めることができる。 As a result, when the floor member is attached to the outer surface of the upper swing body using the fasteners, the attachment positions of the two can be accurately aligned, and the workability of the attachment work can be improved. Moreover, since the worker can perform the attaching operation using the fastener with a sense of security under the floor member held in a stable state by the temporary fixing mechanism, the workability can be further improved.

請求項２の発明によれば、上部旋回体の外側面に突設された仮止め突起に、フロア部材のうち上部旋回体の外側面と対向する面に設けられた仮止め孔を係合させることにより、フロア部材を上部旋回体に対して安定した状態に仮止めすることができ、かつ、フロア部材に設けられた挿通孔を上部旋回体に設けられた取付孔に対して位置合わせすることができる。このため、フロア部材の挿通孔に挿通した締結具を、上部旋回体の取付孔に容易に取付けることができ、締結具を用いてフロア部材を上部旋回体に取付ける作業を迅速に行うことができる。 According to the invention of claim 2, the temporary fixing protrusion provided on the outer surface of the upper swing body is engaged with the temporary fixing hole provided on the surface of the floor member facing the outer surface of the upper swing body. Thus, the floor member can be temporarily fixed to the upper swing body in a stable state, and the insertion hole provided in the floor member is aligned with the mounting hole provided in the upper swing body. Can do. For this reason, the fastener inserted through the insertion hole of the floor member can be easily attached to the attachment hole of the upper swing body, and the work of attaching the floor member to the upper swing body using the fastener can be quickly performed. .

以下、本発明に係る建設機械の実施の形態を油圧ショベルに適用した場合を例に挙げ、添付図面を参照しつつ詳細に説明する。 Hereinafter, a case where an embodiment of a construction machine according to the present invention is applied to a hydraulic excavator will be described as an example, and will be described in detail with reference to the accompanying drawings.

図中、１は油圧ショベルを示し、該油圧ショベル１は、自走可能なクローラ式の下部走行体２と、下部走行体２上に旋回輪３を介して旋回可能に搭載された上部旋回体４と、上部旋回体４の前部側に俯仰動可能に設けられた作業装置５とにより大略構成され、土砂等の掘削作業を行うものである。 In the figure, reference numeral 1 denotes a hydraulic excavator. The hydraulic excavator 1 is a self-propelled crawler-type lower traveling body 2 and an upper revolving body mounted on the lower traveling body 2 so as to be capable of turning via a turning wheel 3. 4 and an operation device 5 provided on the front side of the upper swing body 4 so as to be able to move up and down, and performs excavation work such as earth and sand.

ここで、上部旋回体４は、旋回輪３上に取付けられた後述の旋回フレーム１１と、該旋回フレーム１１の後端側に配設され作業装置５との重量バランスをとるカウンタウエイト６と、カウンタウエイト６の前側に配設されエンジン、油圧ポンプ、熱交換装置等の搭載機器（いずれも図示せず）を収容する建屋カバー７と、建屋カバー７の左前側に配設された作動油タンク８と、建屋カバー７の右前側に配設された燃料タンク９と、旋回フレーム１１の前部左側に配設され運転室を画成するキャブ１０とにより大略構成されている。 Here, the upper revolving unit 4 includes a later-described revolving frame 11 mounted on the revolving wheel 3 and a counterweight 6 disposed on the rear end side of the revolving frame 11 to balance the weight of the working device 5; A building cover 7 that is disposed on the front side of the counterweight 6 and accommodates equipment (not shown) such as an engine, a hydraulic pump, and a heat exchanger, and a hydraulic oil tank that is disposed on the left front side of the building cover 7 8, a fuel tank 9 disposed on the right front side of the building cover 7, and a cab 10 disposed on the left side of the front portion of the swivel frame 11 and defining a driver's cab.

１１は旋回輪３上に取付けられた旋回フレームで、該旋回フレーム１１は、上部旋回体４のベースとなるものである。ここで、図３に示すように、旋回フレーム１１は、厚肉な平板状に形成され前，後方向に延びた底板１２と、該底板１２上に立設され左，右方向で対面しつつ前，後方向に延びた左，右の縦板１３，１４と、左縦板１３から左側方に張出して設けられた複数の左張出しビーム１５，１５，…と、右縦板１４から右側方に張出して設けられた複数の右張出しビーム１６，１６，…と、各左張出しビーム１５の先端に固着され前，後方向に延びた左サイドフレーム１７と、各右張出しビーム１６の先端に固着され前，後方向に延びた右サイドフレーム１８と、左サイドフレーム１７の前側に位置して底板１２の前部左側に設けられたキャブ支持フレーム１９とにより大略構成され、強固な支持構造体をなしている。 A revolving frame 11 is mounted on the revolving wheel 3, and the revolving frame 11 is a base of the upper revolving body 4. Here, as shown in FIG. 3, the swivel frame 11 is formed in a thick flat plate shape and extends in the front and rear directions, and stands on the bottom plate 12 while facing the left and right directions. Left and right vertical plates 13 and 14 extending in the front and rear directions, a plurality of left extending beams 15, 15, and the like extending from the left vertical plate 13 to the left side, and the right side from the right vertical plate 14 , And a left side frame 17 that extends forward and rearward and is fixed to the front ends of the right extended beams 16. The right side frame 18 extending forward and rearward and the cab support frame 19 provided on the left side of the front portion of the bottom plate 12 and positioned on the front side of the left side frame 17 are generally configured to provide a strong support structure. There is no.

この場合、図４等に示すように、キャブ支持フレーム１９の外側面１９Ａには、後述の左前フロア部材２１を取付けるための複数個（例えば３個）のねじ座２０，２０，…が、前，後方向に間隔をもって配設され、各ねじ座２０には、取付孔としての２個の雌ねじ孔２０Ａ，２０Ａが螺設されている。また、各ねじ座２０間には、後述の仮止めボルト２８が着脱可能に取付けられる構成となっている。 In this case, as shown in FIG. 4 and the like, a plurality (for example, three) of screw seats 20, 20,... The screw seats 20 are provided with two female screw holes 20A and 20A as mounting holes. In addition, a temporary fixing bolt 28 described later is detachably mounted between each screw seat 20.

一方、図３に示すように、左サイドフレーム１７の外側面１７Ａにも、後述の左中間フロア部材２２、左後フロア部材２３を取付けるための複数のねじ座２０，２０，…が前，後方向に間隔をもって配設され、これら各ねじ座２０間には、後述する複数の仮止めボルト２８が着脱可能に取付けられている。さらに、右サイドフレーム１８の外側面１８Ａにも、左サイドフレーム１７と同様に、後述の右前フロア部材２４を取付けるための複数のねじ座と仮止めボルト（いずれも図示せず）とが設けられる構成となっている。 On the other hand, as shown in FIG. 3, a plurality of screw seats 20, 20,... For attaching a left intermediate floor member 22 and a left rear floor member 23, which will be described later, are also provided on the outer side 17A of the left side frame 17. A plurality of temporary fixing bolts 28 to be described later are detachably attached between the screw seats 20. Further, on the outer side surface 18A of the right side frame 18, similarly to the left side frame 17, a plurality of screw seats and temporary fixing bolts (both not shown) for attaching a right front floor member 24 described later are provided. It has a configuration.

２１は旋回フレーム１１を構成するキャブ支持フレーム１９の外側面１９Ａに取付けられた左前フロア部材で、該左前フロア部材２１は、キャブ支持フレーム１９の外側面１９Ａに、後述のフロア取付ボルト２５を用いて着脱可能に取付けられるものである。 Reference numeral 21 denotes a left front floor member attached to the outer side surface 19A of the cab support frame 19 constituting the revolving frame 11. The left front floor member 21 uses a floor mounting bolt 25 described later on the outer side surface 19A of the cab support frame 19. Can be detachably attached.

２２は旋回フレーム１１を構成する左サイドフレーム１７に取付けられた左中間フロア部材、２３は同じく左サイドフレーム１７に取付けられた左後フロア部材で、これら左中間フロア部材２２、左後フロア部材２３は、左サイドフレーム１７の外側面１７Ａにフロア取付ボルト（図示せず）を用いて着脱可能に取付けられるものである。 Reference numeral 22 denotes a left intermediate floor member attached to the left side frame 17 constituting the revolving frame 11, and 23 denotes a left rear floor member also attached to the left side frame 17. These left intermediate floor member 22 and left rear floor member 23 are also provided. Is detachably attached to the outer side surface 17A of the left side frame 17 using a floor mounting bolt (not shown).

そして、これら左前フロア部材２１、左中間フロア部材２２、左後フロア部材２３は、キャットウォーク等と呼ばれるもので、図２に示すように上部旋回体４に沿って前，後方向に延び、例えば上部旋回体４の建屋カバー７内に収容されたエンジン等の搭載機器、作動油タンク８等に対する点検作業を行うときに、作業者が歩行する足場を構成するものである。また、左前フロア部材２１、左中間フロア部材２２、左後フロア部材２３には、これを歩行するときに作業者が把持する手摺り２１Ａ，２２Ａ，２３Ａがそれぞれ設けられている。 The left front floor member 21, the left middle floor member 22, and the left rear floor member 23 are called a catwalk or the like, and extend forward and rearward along the upper swing body 4 as shown in FIG. A scaffold for an operator to walk when performing an inspection work on a mounted device such as an engine, a hydraulic oil tank 8 or the like housed in a building cover 7 of the upper swing body 4 is configured. The left front floor member 21, the left intermediate floor member 22, and the left rear floor member 23 are respectively provided with handrails 21A, 22A, and 23A that are gripped by an operator when walking.

２４は旋回フレーム１１を構成する右サイドフレーム１８に取付けられた右前フロア部材で、該右前フロア部材２４も、左前フロア部材２１と同様に、図３に示す右サイドフレーム１８の外側面１８Ａに、フロア取付ボルト（図示せず）を用いて着脱可能に取付けられるものである。そして、右前フロア部材２４は、例えば燃料タンク９等に対する点検作業を行うときに、作業者が歩行する足場を構成するものである。また、右前フロア部材２４にも、作業者が把持する手摺り２４Ａが設けられている。 24 is a right front floor member attached to the right side frame 18 constituting the revolving frame 11, and the right front floor member 24 is also formed on the outer surface 18A of the right side frame 18 shown in FIG. It is detachably mounted using a floor mounting bolt (not shown). The right front floor member 24 constitutes a scaffold on which an operator walks, for example, when an inspection operation is performed on the fuel tank 9 and the like. The right front floor member 24 is also provided with a handrail 24A that is held by an operator.

ここで、作業用の足場を構成する左前フロア部材２１、左中間フロア部材２２、左後フロア部材２３、右前フロア部材２４のうち、左前フロア部材２１について説明すると、この左前フロア部材２１は、例えば図４に示すように、前，後方向に延びる長方形状の上面板２１Ｂと、上面板２１Ｂを挟んで前，後方向で対面する前面板２１Ｃ，後面板２１Ｄと、上面板２１Ｂを挟んで左，右方向で対面する左側面板２１Ｅ，右側面板２１Ｆとによって囲まれ、全体として前，後方向に延びる直方体の箱状に形成されている。 Here, the left front floor member 21 among the left front floor member 21, the left intermediate floor member 22, the left rear floor member 23, and the right front floor member 24 constituting the work scaffold will be described. As shown in FIG. 4, a rectangular upper surface plate 21B extending in the front and rear directions, a front surface plate 21C and a rear surface plate 21D facing in the front and rear directions across the upper surface plate 21B, and a left surface across the upper surface plate 21B. The left side plate 21E and the right side plate 21F facing each other in the right direction are formed in a rectangular parallelepiped box shape extending in the front and rear directions as a whole.

この場合、左前フロア部材２１の右側面板２１Ｆは、キャブ支持フレーム１９の外側面１９Ａと対面し、右側面板２１Ｆのうちキャブ支持フレーム１９（外側面１９Ａ）に設けられた各ねじ座２０の雌ねじ孔２０Ａに対応する部位には、挿通孔としての複数のボルト挿通孔２１Ｇ，２１Ｇ，…が穿設されている。 In this case, the right side plate 21F of the left front floor member 21 faces the outer side surface 19A of the cab support frame 19, and the female screw hole of each screw seat 20 provided in the cab support frame 19 (outer side surface 19A) of the right side plate 21F. In a portion corresponding to 20A, a plurality of bolt insertion holes 21G, 21G,...

そして、図４及び図８に示すように、左前フロア部材２１の各ボルト挿通孔２１Ｇに、締結具としてのフロア取付ボルト２５を挿通し、このフロア取付ボルト２５を各ねじ座２０の雌ねじ孔２０Ａに螺着することにより、キャブ支持フレーム１９の外側面１９Ａに、フロア取付ボルト２５を用いて左前フロア部材２１が着脱可能に取付けられる構成となっている。なお、フロア取付ボルト２５の頭部と左前フロア部材２１との間には、ワッシャ２５Ａが配置されている。 4 and 8, a floor mounting bolt 25 as a fastener is inserted into each bolt insertion hole 21G of the left front floor member 21, and the floor mounting bolt 25 is inserted into the female screw hole 20A of each screw seat 20. The left front floor member 21 is detachably attached to the outer side surface 19 A of the cab support frame 19 by using the floor mounting bolt 25. A washer 25 A is disposed between the head of the floor mounting bolt 25 and the left front floor member 21.

一方、左中間フロア部材２２と左後フロア部材２３は、フロア取付ボルト（図示せず）を用いて左サイドフレーム１７の外側面１７Ａに着脱可能に取付けられ、右前フロア部材２４は、フロア取付ボルト（図示せず）を用いて右サイドフレーム１８の外側面１８Ａに着脱可能に取付けられる構成となっている。 On the other hand, the left intermediate floor member 22 and the left rear floor member 23 are detachably attached to the outer side surface 17A of the left side frame 17 using a floor attachment bolt (not shown), and the right front floor member 24 is a floor attachment bolt. (Not shown) is detachably attached to the outer side surface 18A of the right side frame 18.

２６はキャブ支持フレーム１９の外側面１９Ａと左前フロア部材２１との間に設けられた仮止め機構で、該仮止め機構２６は、左前フロア部材２１をフロア取付ボルト２５を用いてキャブ支持フレーム１９に取付ける作業を行うときに、左前フロア部材２１をキャブ支持フレーム１９に対して仮止めするものである。そして、仮止め機構２６は、図４ないし図８に示すように、キャブ支持フレーム１９の外側面１９Ａに設けられた後述の仮止めボルト２８と、左前フロア部材２１に設けられた後述の仮止め孔２９とにより構成されている。 A temporary fixing mechanism 26 is provided between the outer side surface 19A of the cab support frame 19 and the left front floor member 21. The temporary fixing mechanism 26 uses the floor mounting bolt 25 to attach the left front floor member 21 to the cab support frame 19. The left front floor member 21 is temporarily fixed to the cab support frame 19 when performing the work of attaching to the cab. As shown in FIGS. 4 to 8, the temporary fixing mechanism 26 includes a temporary fixing bolt 28 described later provided on the outer side surface 19 A of the cab support frame 19 and a temporary fixing described later provided on the left front floor member 21. The hole 29 is constituted.

２７，２７はキャブ支持フレーム１９の外側面１９Ａに設けられた複数個（例えば２個）のボルト保持部材で、該各ボルト保持部材２７は、中央部に１個の雌ねじ孔２７Ａが螺設された平板からなり、その雌ねじ孔２７Ａに後述の仮止めボルト２８が螺着されるものである（図７参照）。そして、各ボルト保持部材２７は、３個のねじ座２０の間に配置され、キャブ支持フレーム１９の外側面１９Ａに溶接等の手段を用いて固着されている。 Reference numerals 27 and 27 denote a plurality of (for example, two) bolt holding members provided on the outer surface 19A of the cab support frame 19, and each of the bolt holding members 27 has one female screw hole 27A screwed at the center. A temporary fixing bolt 28 described later is screwed into the female screw hole 27A (see FIG. 7). Each bolt holding member 27 is disposed between the three screw seats 20 and is fixed to the outer side surface 19A of the cab support frame 19 by means such as welding.

２８，２８は各ねじ座２０と離間してキャブ支持フレーム１９の外側面１９Ａに突設された複数本（例えば２本）の仮止め突起としての仮止めボルトで、該各仮止めボルト２８は、図４ないし図７に示すように、各ボルト保持部材２７の雌ねじ孔２７Ａに螺着されることにより、キャブ支持フレーム１９の外側面１９Ａから左側方へと突出している。ここで、各仮止めボルト２８は、ボルト保持部材２７の雌ねじ孔２７Ａに螺着される雄ねじ部２８Ａと、該雄ねじ部２８Ａよりも大径な六角形状の頭部２８Ｂとを有する六角ボルトからなっている。 28 and 28 are temporary fixing bolts as a plurality of (for example, two) temporary fixing protrusions provided on the outer surface 19 A of the cab support frame 19 so as to be separated from the screw seats 20. As shown in FIGS. 4 to 7, the boss support frame 19 protrudes leftward from the outer surface 19 A by being screwed into the female screw hole 27 A of each bolt holding member 27. Here, each temporary fixing bolt 28 includes a hexagonal bolt having a male screw portion 28A screwed into the female screw hole 27A of the bolt holding member 27 and a hexagonal head portion 28B having a larger diameter than the male screw portion 28A. ing.

そして、仮止めボルト２８は、左前フロア部材２１をキャブ支持フレーム１９に取付けるときには、図７に示すように、雄ねじ部２８Ａをねじ座２０の雌ねじ孔２０Ａに螺着することによりキャブ支持フレーム１９の外側面１９Ａに突設される。一方、例えば上部旋回体４を輸送車両（図示せず）に積載して輸送するときには、仮止めボルト２８をねじ座２０から取外すことにより、輸送時における上部旋回体４の幅寸法が増大するのを抑えることができる構成となっている。 When the left front floor member 21 is attached to the cab support frame 19, the temporary fixing bolt 28 is attached to the cab support frame 19 by screwing the male screw portion 28 A into the female screw hole 20 A of the screw seat 20 as shown in FIG. 7. It protrudes from the outer surface 19A. On the other hand, for example, when the upper revolving unit 4 is loaded and transported on a transport vehicle (not shown), the width dimension of the upper revolving unit 4 during transportation is increased by removing the temporary fixing bolt 28 from the screw seat 20. It is the structure which can suppress.

２９，２９は各ボルト挿通孔２１Ｇから離間して左前フロア部材２１の右側面板２１Ｆに設けられた複数個（例えば２個）の仮止め孔で、該各仮止め孔２９は、キャブ支持フレーム１９側に突設された各仮止めボルト２８に係合するものである。ここで、各仮止め孔２９は、図４ないし図７に示すように、仮止めボルト２８の頭部２８Ｂが遊挿される大径孔部２９Ａと、この大径孔部２９Ａに連続し当該大径孔部２９Ａよりも小径で仮止めボルト２８の雄ねじ部２８Ａよりも大径な小径孔部２９Ｂとにより、ほぼ達磨状に形成されている。 Reference numerals 29 and 29 denote a plurality of (for example, two) temporary fixing holes provided in the right side plate 21F of the left front floor member 21 so as to be separated from the bolt insertion holes 21G. It engages with each temporary fixing bolt 28 protruding from the side. Here, as shown in FIGS. 4 to 7, each temporary fixing hole 29 is connected to the large-diameter hole portion 29A into which the head 28B of the temporary fixing bolt 28 is loosely inserted, and the large-diameter hole portion 29A. A small diameter hole portion 29B having a diameter smaller than that of the diameter hole portion 29A and larger than that of the male screw portion 28A of the temporary fixing bolt 28 is formed in a substantially polished shape.

そして、キャブ支持フレーム１９に左前フロア部材２１を取付けるときには、キャブ支持フレーム１９の外側面１９Ａに突設した各仮止めボルト２８に対し、その頭部２８Ｂ側から、左前フロア部材２１に設けた各仮止め孔２９の大径孔部２９Ａを挿通する。これにより、仮止め孔２９の内周縁が、仮止めボルト２８の雄ねじ部２８Ａに当接して案内され、図６及び図７に示すように、仮止め孔２９の小径孔部２９Ｂが、自動的に仮止めボルト２８の雄ねじ部２８Ａに係合する。 When attaching the left front floor member 21 to the cab support frame 19, each temporary fixing bolt 28 protruding from the outer side surface 19 A of the cab support frame 19 is provided on the left front floor member 21 from the head 28 B side. The large diameter hole 29A of the temporary fixing hole 29 is inserted. As a result, the inner peripheral edge of the temporary fixing hole 29 is guided in contact with the male screw portion 28A of the temporary fixing bolt 28, and the small-diameter hole portion 29B of the temporary fixing hole 29 is automatically turned on as shown in FIGS. Is engaged with the male screw portion 28A of the temporary fixing bolt 28.

このように、左前フロア部材２１に設けた各仮止め孔２９の小径孔部２９Ｂが、キャブ支持フレーム１９の外側面１９Ａに突設した各仮止めボルト２８の雄ねじ部２８Ａに係合することにより、左前フロア部材２１を、キャブ支持フレーム１９に対して安定した状態に仮止めすることができる構成となっている。また、各仮止め孔２９の小径孔部２９Ｂが各仮止めボルト２８に係合した状態において、図６及び図８に示すように、左前フロア部材２１の右側面板２１Ｆに設けた各ボルト挿通孔２１Ｇを、キャブ支持フレーム１９の外側面１９Ａに設けた各ねじ座２０の雌ねじ孔２０Ａに対し、ほぼ同心上に位置合わせすることができる構成となっている。 As described above, the small diameter hole portions 29B of the temporary fixing holes 29 provided in the left front floor member 21 are engaged with the male screw portions 28A of the temporary fixing bolts 28 protruding from the outer surface 19A of the cab support frame 19. The left front floor member 21 can be temporarily fixed to the cab support frame 19 in a stable state. Further, in a state where the small diameter holes 29B of the temporary fixing holes 29 are engaged with the temporary fixing bolts 28, as shown in FIGS. 6 and 8, the bolt insertion holes provided in the right side plate 21F of the left front floor member 21. 21G can be aligned substantially concentrically with the female screw hole 20A of each screw seat 20 provided on the outer side surface 19A of the cab support frame 19.

そして、上述した仮止めボルト２８と仮止め孔２９とによって構成される仮止め機構２６は、旋回フレーム１１を構成する左サイドフレーム１７の外側面１７Ａと左中間フロア部材２２との間、同じく左サイドフレーム１７の外側面１７Ａと左後フロア部材２３との間、右サイドフレーム１８の外側面１８Ａにも設けられる構成となっている。 The temporary fixing mechanism 26 constituted by the temporary fixing bolt 28 and the temporary fixing hole 29 described above is provided between the outer side surface 17A of the left side frame 17 and the left intermediate floor member 22 constituting the revolving frame 11, and is also left-handed. The structure is also provided between the outer side surface 17A of the side frame 17 and the left rear floor member 23 and also on the outer side surface 18A of the right side frame 18.

本実施の形態による油圧ショベル１は上述の如き構成を有するもので、該油圧ショベル１は、例えば下部走行体２と、上部旋回体４と、作業装置５とに分解された状態で個別に作業現場に輸送された後、作業現場において再び下部走行体２と、上部旋回体４と、作業装置５とからなる油圧ショベル１（図１参照）として組立てられる。そして、上部旋回体４の旋回フレーム１１には、作業者の足場となる左前フロア部材２１、左中間フロア部材２２、左後フロア部材２３、右前フロア部材２４が取付けられる。 The hydraulic excavator 1 according to the present embodiment has the above-described configuration. The hydraulic excavator 1 is individually operated in a state where it is disassembled into, for example, a lower traveling body 2, an upper swing body 4, and a working device 5. After being transported to the work site, it is assembled again as a hydraulic excavator 1 (see FIG. 1) comprising the lower traveling body 2, the upper swing body 4 and the work device 5 at the work site. Then, a left front floor member 21, a left intermediate floor member 22, a left rear floor member 23, and a right front floor member 24, which serve as a scaffold for the operator, are attached to the turning frame 11 of the upper turning body 4.

そして、油圧ショベル１は、下部走行体２によって所望の掘削場所まで自走し、上部旋回体４を旋回させつつ作業装置５を用いて土砂の掘削作業等を行う。また、上部旋回体４の建屋カバー７内に収容されたエンジン等の搭載機器、作動油タンク８、燃料タンク９等に対する点検を行うときには、作業者は、旋回フレーム１１に取付けられた左前フロア部材２１、左中間フロア部材２２、左後フロア部材２３、右前フロア部材２４を歩行しつつ点検作業を行う。 Then, the excavator 1 self-travels to a desired excavation place by the lower traveling body 2, and performs excavation work of earth and sand using the working device 5 while rotating the upper revolving body 4. Further, when inspecting the mounted equipment such as the engine, the hydraulic oil tank 8, the fuel tank 9, etc. accommodated in the building cover 7 of the upper swing body 4, the operator can move the left front floor member attached to the swing frame 11. 21, the left middle floor member 22, the left rear floor member 23, and the right front floor member 24 are inspected while walking.

ここで、本実施の形態による油圧ショベル１では、旋回フレーム１１に左前フロア部材２１、左中間フロア部材２２、左後フロア部材２３、右前フロア部材２４を取付けるときの作業性を高めることができるようになっており、以下、旋回フレーム１１を構成するキャブ支持フレーム１９に、左前フロア部材２１を取付ける作業について説明する。 Here, in the hydraulic excavator 1 according to the present embodiment, workability when the left front floor member 21, the left intermediate floor member 22, the left rear floor member 23, and the right front floor member 24 are attached to the revolving frame 11 can be improved. Hereinafter, an operation of attaching the left front floor member 21 to the cab support frame 19 constituting the revolving frame 11 will be described.

この左前フロア部材２１の取付作業に際しては、まず、油圧クレーン等（図示せず）を用いて左前フロア部材２１を吊下げ、図４及び図５に示すように、キャブ支持フレーム１９の外側面１９Ａと、左前フロア部材２１の右側面板２１Ｆとを対面させる。 In attaching the left front floor member 21, first, the left front floor member 21 is suspended by using a hydraulic crane or the like (not shown), and as shown in FIGS. 4 and 5, the outer side surface 19A of the cab support frame 19 is used. And the right side face plate 21F of the left front floor member 21 are made to face each other.

そして、左前フロア部材２１を、キャブ支持フレーム１９に接近させることにより、キャブ支持フレーム１９の外側面１９Ａに突設した各仮止めボルト２８に対し、その頭部２８Ｂ側から、左前フロア部材２１に設けた各仮止め孔２９の大径孔部２９Ａを挿通する。この状態で、油圧クレーンによって吊下げた左前フロア部材２１を、その自重によって僅かに下方に下ろすことにより、仮止め孔２９の内周縁が、仮止めボルト２８の雄ねじ部２８Ａに当接して案内され、図６及び図７に示すように、仮止め孔２９の小径孔部２９Ｂが、自動的に仮止めボルト２８の雄ねじ部２８Ａに係合する。 Then, by bringing the left front floor member 21 closer to the cab support frame 19, each temporary fixing bolt 28 protruding from the outer side surface 19 A of the cab support frame 19 is applied to the left front floor member 21 from the head 28 B side. The large-diameter hole 29A of each provided temporary fixing hole 29 is inserted. In this state, the left front floor member 21 suspended by the hydraulic crane is lowered slightly by its own weight, whereby the inner peripheral edge of the temporary fixing hole 29 is guided in contact with the male screw portion 28A of the temporary fixing bolt 28. 6 and 7, the small-diameter hole portion 29B of the temporary fixing hole 29 automatically engages with the male screw portion 28A of the temporary fixing bolt 28.

これにより、左前フロア部材２１を、油圧クレーンによって宙吊り状態に吊下げることなく、キャブ支持フレーム１９に取付けた２本の仮止めボルト２８によって確実に保持することができ、キャブ支持フレーム１９に対して安定した状態に仮止めすることができる。 Accordingly, the left front floor member 21 can be reliably held by the two temporary fixing bolts 28 attached to the cab support frame 19 without being suspended in a suspended state by a hydraulic crane. It can be temporarily fixed in a stable state.

また、各仮止め孔２９の小径孔部２９Ｂが、各仮止めボルト２８に係合した状態において、図６及び図８に示すように、左前フロア部材２１の右側面板２１Ｆに設けた各ボルト挿通孔２１Ｇが、キャブ支持フレーム１９の外側面１９Ａに設けた各ねじ座２０の雌ねじ孔２０Ａに対し、ほぼ同心上に位置合わせされる。 Further, in the state where the small-diameter hole portions 29B of the temporary fixing holes 29 are engaged with the temporary fixing bolts 28, as shown in FIGS. 6 and 8, the bolts inserted in the right side plate 21F of the left front floor member 21 are inserted. The hole 21G is aligned substantially concentrically with the female screw hole 20A of each screw seat 20 provided on the outer side surface 19A of the cab support frame 19.

この状態で、左前フロア部材２１の各ボルト挿通孔２１Ｇにフロア取付ボルト２５を挿通し、このフロア取付ボルト２５を、キャブ支持フレーム１９に設けたねじ座２０の雌ねじ孔２０Ａに螺着することにより、キャブ支持フレーム１９の外側面１９Ａに、複数のフロア取付ボルト２５を用いて左前フロア部材２１を取付けることができる。 In this state, the floor mounting bolt 25 is inserted into each bolt insertion hole 21G of the left front floor member 21, and the floor mounting bolt 25 is screwed into the female screw hole 20A of the screw seat 20 provided in the cab support frame 19. The left front floor member 21 can be attached to the outer side surface 19 A of the cab support frame 19 using a plurality of floor mounting bolts 25.

この場合、本実施の形態によれば、左前フロア部材２１を、キャブ支持フレーム１９に取付けた２本の仮止めボルト２８によって保持することにより、キャブ支持フレーム１９に対して安定した状態に仮止めすることができる。このため、例えば左前フロア部材２１を油圧クレーン等によって宙吊り状態に保持したまま取付作業を行う場合に比較して、左前フロア部材２１の各ボルト挿通孔２１Ｇと、キャブ支持フレーム１９に設けたねじ座２０の雌ねじ孔２０Ａとの位置合わせを精度良く行うことができ、フロア取付ボルト２５を用いて左前フロア部材２１を取付けるときの作業性を高めることができる。 In this case, according to the present embodiment, the left front floor member 21 is temporarily fixed in a stable state with respect to the cab support frame 19 by being held by the two temporary fixing bolts 28 attached to the cab support frame 19. can do. For this reason, for example, compared to the case where the left front floor member 21 is attached while being suspended by a hydraulic crane or the like, the bolt insertion holes 21G of the left front floor member 21 and the screw seats provided in the cab support frame 19 are used. Therefore, the positioning with the 20 female screw holes 20A can be performed with high accuracy, and the workability when the left front floor member 21 is attached using the floor mounting bolts 25 can be improved.

しかも、左前フロア部材２１に設けた各仮止め孔２９の小径孔部２９Ｂを、キャブ支持フレーム１９に取付けた各仮止めボルト２８に係合させることにより、図６及び図８に示すように、左前フロア部材２１の各ボルト挿通孔２１Ｇを、キャブ支持フレーム１９に設けた各ねじ座２０の雌ねじ孔２０Ａに対してほぼ同心上に位置合わせすることができる。この結果、左前フロア部材２１の各ボルト挿通孔２１Ｇに挿通したフロア取付ボルト２５を、キャブ支持フレーム１９のねじ座２０に迅速かつ容易に螺着することができ、フロア取付ボルト２５を用いた左前フロア部材２１の取付作業の作業性を一層高めることができる。 In addition, by engaging the small diameter holes 29B of the temporary fixing holes 29 provided in the left front floor member 21 with the temporary fixing bolts 28 attached to the cab support frame 19, as shown in FIGS. Each bolt insertion hole 21 G of the left front floor member 21 can be aligned substantially concentrically with the female screw hole 20 A of each screw seat 20 provided in the cab support frame 19. As a result, the floor mounting bolt 25 inserted into each bolt insertion hole 21G of the left front floor member 21 can be quickly and easily screwed to the screw seat 20 of the cab support frame 19. The workability of the installation work of the floor member 21 can be further enhanced.

また、仮止めボルト２８は、左前フロア部材２１をキャブ支持フレーム１９に取付けるときには、図７に示すように、ボルト保持部材２７の雌ねじ孔２７Ａに螺着されることによりキャブ支持フレーム１９の外側面１９Ａに突設されるが、例えば上部旋回体４を輸送車両（図示せず）に積載して輸送するときには、仮止めボルト２８をボルト保持部材２７から取外すことができる。これにより、輸送時における上部旋回体４の幅寸法が増大するのを抑えることができ、輸送作業の作業性をも高めることができる。 Further, when the left front floor member 21 is attached to the cab support frame 19, the temporary fixing bolt 28 is screwed into the female screw hole 27A of the bolt holding member 27 as shown in FIG. 19A, the temporary revolving bolt 28 can be removed from the bolt holding member 27 when, for example, the upper turning body 4 is loaded on a transport vehicle (not shown) and transported. Thereby, it can suppress that the width dimension of the upper turning body 4 at the time of transport can increase, and can also improve workability | operativity of transport work.

また、本実施の形態によれば、左前フロア部材２１を、キャブ支持フレーム１９に取付けた２本の仮止めボルト２８によって仮止めすることにより、例えば左前フロア部材２１を油圧クレーン等によって宙吊り状態に保持する場合に比較して、左前フロア部材２１を、キャブ支持フレーム１９に対して安定した状態に保持することができる。このため、フロア取付ボルト２５を用いて左前フロア部材２１をキャブ支持フレーム１９に取付ける作業を、仮止めされた左前フロア部材２１の下方で安全に行うことができ、左前フロア部材２１を取付けるときの安全性を高めることができる。しかも、作業者は、仮止め機構２６によって安定した状態に保持された左前フロア部材２１の下方で、安心感をもってフロア取付ボルト２５を用いた取付作業を行うことができるので、その作業性を一層高めることができる。 Further, according to the present embodiment, the left front floor member 21 is temporarily fixed by the two temporary fixing bolts 28 attached to the cab support frame 19 so that the left front floor member 21 is suspended in a suspended state by a hydraulic crane or the like, for example. Compared to the case of holding, the left front floor member 21 can be held in a stable state with respect to the cab support frame 19. For this reason, the operation of attaching the left front floor member 21 to the cab support frame 19 using the floor mounting bolt 25 can be safely performed below the temporarily fixed left front floor member 21, and when the left front floor member 21 is attached, Safety can be increased. In addition, the operator can perform the mounting operation using the floor mounting bolt 25 with a sense of security under the left front floor member 21 held in a stable state by the temporary fixing mechanism 26, so that the workability is further improved. Can be increased.

さらに、油圧クレーンによって吊下げた左前フロア部材２１を、仮止めボルト２８によってキャブ支持フレーム１９に仮止めした後には、左前フロア部材２１を油圧クレーンによって保持し続ける必要がない。従って、左前フロア部材２１を仮止めボルト２８によってキャブ支持フレーム１９に仮止めした後には、油圧クレーンを、例えば左中間フロア部材２２等の他の部品の組立て作業に使用することができる。この結果、油圧クレーン等を用いて油圧ショベル１全体の組立て作業を効率良く行うことができる。 Further, after the left front floor member 21 suspended by the hydraulic crane is temporarily fixed to the cab support frame 19 by the temporary fixing bolt 28, it is not necessary to continue holding the left front floor member 21 by the hydraulic crane. Therefore, after the left front floor member 21 is temporarily fixed to the cab support frame 19 by the temporary fixing bolt 28, the hydraulic crane can be used for assembling other parts such as the left intermediate floor member 22, for example. As a result, the assembly work of the entire excavator 1 can be efficiently performed using a hydraulic crane or the like.

かくして、仮止めボルト２８と仮止め孔２９とからなる仮止め機構２６を利用して、旋回フレーム１１を構成するキャブ支持フレーム１９の外側面１９Ａに左前フロア部材２１を取付けた後には、これと同様の組立て手順により、左サイドフレーム１７の外側面１７Ａに対し、左中間フロア部材２２と左後フロア部材２３を容易に取付けることができ、右サイドフレーム１８の外側面１８Ａに対し、右前フロア部材２４を容易に取付けることができる。 Thus, after the front left floor member 21 is attached to the outer surface 19A of the cab support frame 19 constituting the revolving frame 11 by using the temporary fixing mechanism 26 including the temporary fixing bolt 28 and the temporary fixing hole 29, By the same assembling procedure, the left intermediate floor member 22 and the left rear floor member 23 can be easily attached to the outer side surface 17A of the left side frame 17, and the right front floor member is set to the outer side surface 18A of the right side frame 18. 24 can be easily installed.

なお、上述した実施の形態では、左前フロア部材２１の右側面板２１Ｆに、大径孔部２９Ａと小径孔部２９Ｂとを有する達磨状の仮止め孔２９を設け、大径孔部２９Ａ内に挿通された仮止めボルト２８が小径孔部２９Ｂに係合することにより、左前フロア部材２１の各ボルト挿通孔２１Ｇと、キャブ支持フレーム１９に設けた各ねじ座２０の雌ねじ孔２０Ａとを位置合わせする構成を例示している。 In the above-described embodiment, the right side plate 21F of the left front floor member 21 is provided with a mortar-like temporary fixing hole 29 having a large-diameter hole portion 29A and a small-diameter hole portion 29B, and is inserted into the large-diameter hole portion 29A. By engaging the temporary fixing bolt 28 with the small-diameter hole 29B, the bolt insertion holes 21G of the left front floor member 21 and the female screw holes 20A of the screw seats 20 provided in the cab support frame 19 are aligned. The structure is illustrated.

しかし、本発明はこれに限るものではなく、例えば図９に示す変形例のように、ほぼ三角形状をなす仮止め孔３０を設ける構成としてもよい。この場合には、仮止め孔３０内に挿通された仮止めボルト２８が、三角形状をなす仮止め孔３０の上端側の角隅部３０Ａに係合することにより、左前フロア部材２１の各ボルト挿通孔２１Ｇと、キャブ支持フレーム１９に設けた各ねじ座２０の雌ねじ孔２０Ａとを位置合わせすることができる。 However, the present invention is not limited to this. For example, a temporary fixing hole 30 having a substantially triangular shape may be provided as in a modification shown in FIG. In this case, the temporary fixing bolt 28 inserted into the temporary fixing hole 30 is engaged with the corner portion 30A on the upper end side of the temporary fixing hole 30 having a triangular shape, whereby each bolt of the left front floor member 21 is engaged. The insertion hole 21G and the female screw hole 20A of each screw seat 20 provided in the cab support frame 19 can be aligned.

また、上述した実施の形態では、キャブ支持フレーム１９の外側面１９Ａ等に突設される仮止め突起として、六角ボルトからなる仮止めボルト２８を用いた場合を例示している。しかし、本発明はこれに限らず、例えばキャブ支持フレーム１９の外側面１９Ａ等に抜差し可能に取付けられる円柱状のピンを用いる構成としてもよい。 Further, in the above-described embodiment, the case where the temporary fixing bolt 28 made of a hexagonal bolt is used as the temporary fixing protrusion protruding from the outer surface 19A of the cab support frame 19 is illustrated. However, the present invention is not limited to this. For example, a cylindrical pin that is detachably attached to the outer surface 19A of the cab support frame 19 may be used.

さらに、上述した実施の形態では、各フロア部材２１，２２，２３，２４が取付けられる建設機械として油圧ショベル１を例に挙げている。しかし、本発明はこれに限らず、例えば油圧ショベル、杭打機等の他の建設機械にも広く適用することができる。 Furthermore, in the embodiment described above, the excavator 1 is taken as an example of a construction machine to which the floor members 21, 22, 23, 24 are attached. However, the present invention is not limited to this, and can be widely applied to other construction machines such as a hydraulic excavator and a pile driver.

本発明の実施の形態による油圧ショベルを示す正面図である。1 is a front view showing a hydraulic excavator according to an embodiment of the present invention. 作業装置を取外した状態で油圧ショベルを上方からみた平面図である。It is the top view which looked at the hydraulic excavator in the state which removed the working device. 油圧ショベルの旋回フレーム、フロア部材等を示す分解斜視図である。It is a disassembled perspective view which shows the turning frame, floor member, etc. of a hydraulic excavator. 図３中のキャブ支持フレーム、左前フロア部材、仮止め機構等を示す要部拡大の分解斜視図である。It is a disassembled perspective view of the principal part expansion which shows the cab support frame, left front floor member, temporary fixing mechanism, etc. in FIG. キャブ支持フレームの仮止めボルト、左前フロア部材の仮止め孔等を示す要部拡大の正面図である。It is a front view of the principal part expansion which shows the temporary fixing bolt of a cab support frame, the temporary fixing hole of a left front floor member, etc. キャブ支持フレームの仮止めボルトに、左前フロア部材の仮止め孔が係合した状態等を示す要部拡大の正面図である。It is a front view of the principal part expansion which shows the state etc. which the temporary fixing hole of the left front floor member engaged with the temporary fixing bolt of the cab support frame. 仮止めボルトと仮止め孔とが係合した状態を図６中の矢示VII−VII方向からみた断面図である。It is sectional drawing which looked at the state which the temporary fix | stop bolt and the temporary fix | stop hole engaged from the arrow VII-VII direction in FIG. キャブ支持フレームの雌ねじ孔と左前フロア部材のボルト挿通孔とが位置合わせされた状態を示す図６中の矢示VIII−VIII方向からみた断面図である。It is sectional drawing seen from the arrow VIII-VIII direction in FIG. 6 which shows the state in which the internal thread hole of the cab support frame and the bolt insertion hole of the left front floor member were aligned. 仮止め孔の変形例を示す図４と同様な分解斜視図である。It is a disassembled perspective view similar to FIG. 4 which shows the modification of a temporary fix | stop hole.

Explanation of symbols

１油圧ショベル
２下部走行体
４上部旋回体
１１旋回フレーム
１７左サイドフレーム
１８右サイドフレーム
１９キャブ支持フレーム
１７Ａ，１８Ａ，１９Ａ外側面
２０ねじ座
２０Ａ雌ねじ孔（取付孔）
２１左前フロア部材
２１Ｇボルト挿通孔（挿通孔）
２２左中間フロア部材
２３左後フロア部材
２４右前フロア部材
２５フロア取付ボルト（締結具）
２６仮止め機構
２８仮止めボルト（仮止め突起）
２９，３０仮止め孔 DESCRIPTION OF SYMBOLS 1 Hydraulic excavator 2 Lower traveling body 4 Upper revolving body 11 Revolving frame 17 Left side frame 18 Right side frame 19 Cab support frame 17A, 18A, 19A Outer side surface 20 Screw seat 20A Female screw hole (mounting hole)
21 Left front floor member 21G Bolt insertion hole (insertion hole)
22 left middle floor member 23 left rear floor member 24 right front floor member 25 floor mounting bolt (fastener)
26 Temporary fastening mechanism 28 Temporary fastening bolt (temporary fastening projection)
29, 30 Temporary fixing hole

Claims

A self-propelled lower traveling body, an upper revolving body that is turnably mounted on the lower traveling body, and an inspection of the upper revolving body that is detachably attached to the outer surface of the upper revolving body using a fastener. In a construction machine comprising a floor member that forms a scaffold when performing work,
A temporary fixing mechanism for temporarily fixing the floor member to the upper swing body at a position different from the fastener is provided between the outer surface of the upper swing body and the floor member. And construction machinery.

A mounting hole to which the fastener is attached is provided on the outer surface of the upper swing body, and an insertion hole through which the fastener is inserted is provided on a surface of the floor member that faces the outer surface of the upper swing body,
The temporary fixing mechanism includes a temporary fixing protrusion protruding from an outer surface of the upper swing body separated from the mounting hole, and an outer surface of the upper swing body spaced from the insertion hole of the floor member. 2. The structure according to claim 1, wherein the floor member is temporarily fixed by being provided on opposing surfaces and engaging the temporary fixing protrusions and aligning the insertion hole and the mounting hole. The construction machine described.