JP6498592B2

JP6498592B2 - Small construction machinery

Info

Publication number: JP6498592B2
Application number: JP2015212959A
Authority: JP
Inventors: 知明芦田; 川本　純也; 純也川本; 浩多辺田
Original assignee: Hitachi Construction Machinery Tierra Co Ltd
Current assignee: Hitachi Construction Machinery Tierra Co Ltd
Priority date: 2015-10-29
Filing date: 2015-10-29
Publication date: 2019-04-10
Anticipated expiration: 2035-10-29
Also published as: JP2017082511A

Description

本発明は、例えば油圧ショベル等の建設機械に関し、特に、原動機と運転席とが隣接して配置された小型の建設機械に関する。 The present invention relates to a construction machine such as a hydraulic excavator, and more particularly to a small construction machine in which a prime mover and a driver's seat are arranged adjacent to each other.

一般に、建設機械の代表例としての油圧ショベルは、自走可能な下部走行体と、前記下部走行体上に旋回可能に搭載された上部旋回体と、前記上部旋回体の前，後方向の前側に俯仰動可能に設けられたフロント装置とにより構成されている。 In general, a hydraulic excavator as a representative example of a construction machine includes a lower traveling body capable of self-propelling, an upper revolving body that is turnably mounted on the lower traveling body, and front and rear sides of the upper revolving body. And a front device provided so as to be movable up and down.

ここで、油圧ショベルには、狭い作業現場等で作業を行うための小型の油圧ショベルがある。この小型の油圧ショベルは、通常ミニショベルと呼ばれるもので、建物の内部での解体作業、狭い街路地等での掘削作業等に用いられるため、例えば機械重量が０．７〜８トン程度までに抑えられている。従って、小型の油圧ショベルは、下部走行体、上部旋回体を含む車体全体がコンパクトに形成されている。 Here, the hydraulic excavator includes a small hydraulic excavator for performing work in a narrow work site or the like. This small hydraulic excavator is usually called a mini excavator and is used for dismantling work inside buildings, excavation work in narrow streets, etc. For example, the machine weight is about 0.7 to 8 tons It is suppressed. Therefore, the small hydraulic excavator has a compact overall vehicle body including the lower traveling body and the upper turning body.

小型の油圧ショベルの上部旋回体は、支持構造体をなす旋回フレームと、前記フロント装置との重量バランスをとるために前記旋回フレームの後側に取付けられたカウンタウエイトと、前記カウンタウエイトの前側に位置して前記旋回フレームの後側に左，右方向に延在する横置き状態で搭載され、油圧ポンプを駆動する原動機と、前記原動機の前側から前記旋回フレームに立設された前面板および前記前面板の上部から後側に延び前記原動機の上側を覆うと共に座席が取付けられる座席取付板からなる運転席台座と、前記運転席台座の前側に位置して前記旋回フレームに設けられた足置き部材とを備えている。 An upper swing body of a small hydraulic excavator includes a swing frame forming a support structure, a counterweight attached to the rear side of the swing frame to balance the weight with the front device, and a front side of the counterweight. A motor mounted on the rear side of the revolving frame and extending in the left and right directions and driving a hydraulic pump; a front plate standing on the revolving frame from the front side of the motor; and A driver seat pedestal comprising a seat mounting plate extending from the upper part of the front plate to the rear side and covering the upper side of the prime mover and to which a seat is mounted; And.

ここで、運転席台座の前面板には、原動機の前側部分をメンテナンスするための開口部が設けられている。この前面板には、開口部を覆うようにカバー部材が着脱可能に取付けられている。この場合、原動機は、熱や騒音を発生するから、この熱や騒音が開口部から漏れ出さないように、カバー部材は、前面板に対して気密に、かつガタツクことなく取付ける必要がある。このため、カバー部材の周囲には、多くのボルト挿通孔が設けられ、このボルト挿通孔に挿通したボルトを前面板に螺着することにより、カバー部材は、その周囲を前面板に対して着脱可能に取付ける構成としている（例えば、特許文献１参照）。 Here, the front plate of the driver seat base is provided with an opening for maintaining the front side portion of the prime mover. A cover member is detachably attached to the front plate so as to cover the opening. In this case, since the prime mover generates heat and noise, the cover member needs to be attached to the front plate in an airtight manner without rattling so that the heat and noise do not leak from the opening. For this reason, a lot of bolt insertion holes are provided around the cover member, and the cover member can be attached to and detached from the front plate by screwing the bolts inserted into the bolt insertion holes to the front plate. It is set as the structure which can be attached (for example, refer patent document 1).

特開２００５−０９６６３１号公報JP 2005-096631 A

ところで、特許文献１によるものでは、カバー部材を前面板に対し多くのボルトを用いて取付ける構成としているから、ボルトを緩めたり、締付けたりするのに手間を要してしまう。特に、小型の油圧ショベルでは、旋回フレーム上の狭隘なスペース内にエンジン、油圧ポンプ、座席、各種レバー等を互いに接近した状態で配置しているから、作業スペースを確保するのが難しく、手が届き難い下側のボルトの着脱作業に手間を要してしまうという問題がある。 By the way, in the thing by patent document 1, since it is set as the structure which attaches a cover member to a front plate using many volt | bolts, it will require an effort to loosen or tighten a volt | bolt. In particular, in a small hydraulic excavator, the engine, hydraulic pump, seat, various levers, etc. are arranged in close proximity to each other in a narrow space on the swivel frame. There is a problem that it takes time to attach and detach the lower bolt which is difficult to reach.

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、本発明の目的は、狭い作業スペースでもカバー部材を簡単に着脱することができ、原動機のメンテナンスを容易に行うことができるようにした小型の建設機械を提供することにある。 The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to allow the cover member to be easily attached and detached even in a narrow work space and to easily perform maintenance of the prime mover. It is to provide a small construction machine.

本発明による小型の建設機械は、自走可能な下部走行体と、前記下部走行体上に旋回可能に搭載された上部旋回体と、前記上部旋回体の前，後方向の前側に俯仰動可能に設けられたフロント装置とからなり、前記上部旋回体は、支持構造体をなす旋回フレームと、前記フロント装置との重量バランスをとるために前記旋回フレームの後側に取付けられたカウンタウエイトと、前記カウンタウエイトの前側に位置して前記旋回フレームの後側に左，右方向に延在する横置き状態で搭載され、油圧ポンプを駆動する原動機と、前記原動機の前側から前記旋回フレームに立設された前面板および前記前面板の上部から後側に延び前記原動機の上側を覆うと共に座席が取付けられる座席取付板からなる運転席台座と、前記運転席台座の前側に位置して前記旋回フレームに設けられた足置き部材とを備えてなる小型の建設機械において、前記運転席台座の前記前面板に設けられ前記原動機の前側部分をメンテナンスするための開口部と、前記運転席台座の前記開口部を閉塞する位置に左，右方向に並べて設けられた第１のカバー部材および第２のカバー部材と、前記第１のカバー部材の下端部と前記前面板の前記開口部の下側位置とのうち一方の部位に設けられた第１の爪部と、前記第２のカバー部材の下端部と前記前面板の前記開口部の下側位置とのうち一方の部位に設けられた第２の爪部と、前記第１のカバー部材の下端部と前記前面板の前記開口部の下側位置とのうち他方の部位に左，右方向に延びて設けられ前記第１の爪部と係合する第１の爪受け部を有する第１の支持部材と、前記第２のカバー部材の下端部と前記前面板の前記開口部の下側位置とのうち他方の部位に左，右方向に延びて設けられ前記第２の爪部と係合する第２の爪受け部を有する第２の支持部材とを備え、前記第１、第２のカバー部材は、前記第１、第２の爪部を前記第１、第２の爪受け部にそれぞれ差し込むことにより下側部分が前記前面板に取付けられ、上側部分が前記開口部の上側に位置して前記前面板に固定部材を用いて取付けられる構成とし、前記第１、第２の支持部材のうち、少なくとも一方の支持部材の爪受け部は、左，右方向の一側で隙間寸法が大きく、他側で小さくなるように楔状に形成された楔状爪受け部とし、前記楔状爪受け部の一側に差し込んだ前記一方の爪部を左，右方向の他側に移動させることにより前記カバー部材の下側部分を前記前面板に対して取付ける構成としたことにある。 A small construction machine according to the present invention is a self-propelled lower traveling body, an upper revolving body that is turnably mounted on the lower traveling body, and can be raised and raised in front of the upper revolving body in the front and rear directions. The upper revolving unit includes a revolving frame that forms a support structure, and a counterweight attached to the rear side of the revolving frame in order to balance the weight of the front device, A prime mover that is mounted on the front side of the counterweight and extends in the left-right direction on the rear side of the swivel frame and that drives the hydraulic pump, and stands on the swivel frame from the front side of the prime mover A driver seat pedestal comprising a front plate and a seat mounting plate extending rearward from the upper portion of the front plate and covering the upper side of the prime mover and to which a seat is attached; and located on the front side of the driver seat pedestal In a small construction machine comprising a footrest member provided on the revolving frame, an opening provided on the front plate of the driver seat base for maintaining a front side portion of the prime mover, and the driver seat base A first cover member and a second cover member arranged side by side in a left and right direction at a position to close the opening, a lower end portion of the first cover member, and a lower portion of the opening of the front plate A first claw portion provided at one of the side positions, a lower end portion of the second cover member, and a lower position of the opening of the front plate. The first claw portion that extends leftward and rightward in the other portion of the second claw portion, the lower end portion of the first cover member, and the lower position of the opening portion of the front plate. A first support member having a first claw receiving portion to engage with, A second claw receiver that extends in the left and right directions at the other portion of the lower end portion of the cover member 2 and the lower position of the opening of the front plate and engages with the second claw portion. A second support member having a portion, wherein the first and second cover members are provided on the lower side by inserting the first and second claw portions into the first and second claw receiving portions, respectively. A portion is attached to the front plate, an upper portion is located above the opening and is attached to the front plate using a fixing member , and at least one of the first and second support members The claw receiving portion of the support member is a wedge-shaped claw receiving portion formed in a wedge shape so that the gap dimension is large on one side in the left and right directions and small on the other side, and is inserted into one side of the wedge-shaped claw receiving portion The lower side of the cover member by moving the one claw part to the other side in the left and right directions The portion is attached to the front plate .

本発明によれば、狭い作業スペースでもカバー部材を簡単に着脱することができ、原動機のメンテナンスを容易に行うことができる。 According to the present invention, the cover member can be easily attached and detached even in a narrow working space, and the prime mover can be easily maintained.

本発明の第１の実施の形態に係るキャブ仕様の小型の油圧ショベルを示す正面図である。1 is a front view showing a small cab-type hydraulic excavator according to a first embodiment of the present invention. キャブボックスを省略した小型の油圧ショベルを示す正面図である。It is a front view which shows the small hydraulic excavator which abbreviate | omitted the cab box. 運転席を前側に倒して各カバー部材を露出させた状態の上部旋回体を示す斜視図である。It is a perspective view which shows the upper revolving body in the state which fell down the driver's seat to the front side and exposed each cover member. 各カバー部材を取外して開口部からエンジンを露出させた状態の上部旋回体を図３と同様位置から見た斜視図である。It is the perspective view which looked at the upper turning body of the state which removed each cover member and exposed the engine from the opening part similarly to FIG. 運転席台座上に運転席と作業用操作レバーを取付けた状態を示す斜視図である。It is a perspective view which shows the state which attached the driver's seat and the operation lever for work on the driver's seat base. 図５中の運転席台座を後側台座部位と前側台座部位とに分離した状態で示す分解斜視図である。FIG. 6 is an exploded perspective view showing a state where the driver seat base in FIG. 5 is separated into a rear base portion and a front base portion. 第１のカバー部材、第２のカバー部材を取付けた状態の後側台座部位を右後側から示す斜視図である。It is a perspective view which shows the back side base part state in the state which attached the 1st cover member and the 2nd cover member from the right back side. 第１のカバー部材、第２のカバー部材を取外した状態の後側台座部位を左前側から示す分解斜視図である。It is a disassembled perspective view which shows the back side base part state in the state which removed the 1st cover member and the 2nd cover member from the left front side. 第１のカバー部材、第２のカバー部材を取外した状態の後側台座部位を右後側から示す分解斜視図である。It is a disassembled perspective view which shows the back side base part state in the state which removed the 1st cover member and the 2nd cover member from the right rear side. 図８中の前面板の開口部および第１の支持部材、第２の支持部材を示す要部拡大の斜視図である。It is a perspective view of the principal part expansion which shows the opening part of a front plate in FIG. 8, a 1st supporting member, and a 2nd supporting member. 第１のカバー部材と第１の爪部を右後側から拡大して示す斜視図である。It is a perspective view which expands and shows a 1st cover member and a 1st nail | claw part from the right rear side. 第２のカバー部材と第２の爪部を右後側から拡大して示す斜視図である。It is a perspective view which expands and shows a 2nd cover member and a 2nd nail | claw part from the right rear side. 本発明の第２の実施の形態による後側台座部位、第１のカバー部材、第２のカバー部材等を図７と同様位置から見た斜視図である。It is the perspective view which looked at the back side base part by the 2nd Embodiment of this invention, the 1st cover member, the 2nd cover member, etc. from the same position as FIG. 後側台座部位と第１のカバー部材、第２のカバー部材とを分離した状態で示す分解斜視図である。It is a disassembled perspective view shown in the state which isolate | separated the back side base part, the 1st cover member, and the 2nd cover member. 本発明の変形例による各支持部材を前面板の開口部と一緒に示す要部拡大の斜視図である。It is a perspective view of the principal part expansion which shows each support member by the modification of this invention with the opening part of a front plate.

以下、本発明の実施の形態に係る小型の建設機械の代表例として、キャブ仕様の小型の油圧ショベル、所謂ミニショベルを例に挙げ、添付図面に従って詳細に説明する。 Hereinafter, as a representative example of a small construction machine according to an embodiment of the present invention, a small hydraulic excavator with a cab specification, a so-called mini excavator will be described as an example, and a detailed description will be given with reference to the accompanying drawings.

図１ないし図１２は本発明の第１の実施の形態に係る建設機械を示している。 1 to 12 show a construction machine according to a first embodiment of the present invention.

図１において、小型の建設機械として油圧ショベル１は、キャブ仕様の小型の油圧ショベル（ミニショベル）として構成されている。この小型の油圧ショベル１は、自走可能な下部走行体２と、前記下部走行体２上に旋回可能に搭載された上部旋回体３と、前記上部旋回体３の前，後方向の前側に俯仰動可能に設けられ土砂の掘削作業等を行うフロント装置４とにより構成されている。ここで、小型の油圧ショベル１は、建物の内部の解体作業、街路地等の狭い場所での掘削作業に用いられるため、例えば機械重量が０．７〜８トン程度までに抑えられている。 In FIG. 1, a hydraulic excavator 1 as a small construction machine is configured as a small cab-type hydraulic excavator (mini excavator). This small hydraulic excavator 1 includes a self-propelled lower traveling body 2, an upper revolving body 3 that is turnably mounted on the lower traveling body 2, and a front side and a rearward front side of the upper revolving body 3. It is comprised by the front apparatus 4 which is provided so that a heel can be raised and which performs excavation work etc. of earth and sand. Here, since the small hydraulic excavator 1 is used for dismantling work inside a building or excavation work in a narrow place such as a street, the machine weight is suppressed to about 0.7 to 8 tons, for example.

上部旋回体３は、後述の旋回フレーム５、カウンタウエイト６、エンジン７、油圧ポンプ８、運転席台座９、足置き部材２５を含んで構成されている。 The upper swing body 3 includes a swing frame 5, a counterweight 6, an engine 7, a hydraulic pump 8, a driver seat base 9, and a footrest member 25 which will be described later.

旋回フレーム５は、下部走行体２上に旋回可能に取付けられた支持構造体として形成されている。旋回フレーム５の前側には、フロント装置４を揺動可能に支持する支持ブラケット５Ａが設けられている。一方、旋回フレーム５の後側には、後述のカウンタウエイト６が取付けられている。 The swivel frame 5 is formed as a support structure that is turnably mounted on the lower traveling body 2. On the front side of the swivel frame 5, a support bracket 5A that supports the front device 4 in a swingable manner is provided. On the other hand, a counterweight 6 described later is attached to the rear side of the revolving frame 5.

カウンタウエイト６は、旋回フレーム５の後側に取付けられている。このカウンタウエイト６は、フロント装置４との重量バランスをとるもので、例えば鋳造等を用いて成形された重量物として構成されている。 The counterweight 6 is attached to the rear side of the turning frame 5. The counterweight 6 balances the weight with the front device 4 and is configured as a heavy article formed by casting or the like, for example.

図１、図２に示すように、エンジン７は、後述する油圧ポンプ８を駆動する原動機を構成している。エンジン７は、カウンタウエイト６の前側に位置して旋回フレーム５の後側に左，右方向に延在する横置き状態で配設されている。 As shown in FIGS. 1 and 2, the engine 7 constitutes a prime mover that drives a hydraulic pump 8 to be described later. The engine 7 is arranged in a horizontally placed state that is located on the front side of the counterweight 6 and extends leftward and rightward on the rear side of the revolving frame 5.

エンジン７には、例えば左，右方向の左側に位置して油圧ポンプ８が設けられ、右側には冷却ファン（図示せず）が設けられている。油圧ポンプ８は、エンジン７によって駆動されることにより、下部走行体２、フロント装置４等に設けられた油圧アクチュエータに作動油を供給するものである。また、冷却ファンと対面する位置には、エンジン冷却水、作動油等を冷却するための熱交換装置（図示せず）が設けられている。なお、原動機としては、エンジンにアシスト用の電動モータを設けたハイブリッド式の原動機を用いることもでき、電動モータだけを原動機として用いることもできる。 The engine 7 is provided with, for example, a hydraulic pump 8 located on the left side in the left and right directions, and a cooling fan (not shown) on the right side. The hydraulic pump 8 is driven by the engine 7 to supply hydraulic oil to hydraulic actuators provided in the lower traveling body 2, the front device 4, and the like. A heat exchange device (not shown) for cooling engine coolant, hydraulic oil, etc. is provided at a position facing the cooling fan. As the prime mover, a hybrid prime mover provided with an electric motor for assisting in the engine can be used, or only the electric motor can be used as the prime mover.

次に、旋回フレーム５上に設けられた本実施の形態の特徴部分となる運転席台座９と足置き部材２５の構成について述べる。 Next, the configuration of the driver seat base 9 and the footrest member 25 which are the characteristic portions of the present embodiment provided on the turning frame 5 will be described.

図２ないし図４に示すように、運転席台座９は、例えば、後側に位置する後側台座部位１０と、この後側台座部位１０の前側に取付けられる前側台座部位２１とにより構成されている。本実施の形態では、運転席台座９とエンジン７との配置関係で、運転席台座９を後側台座部位１０と前側台座部位２１との２部材に分割しているが、１つの部材として運転席台座を構成することもできる。 As shown in FIGS. 2 to 4, the driver's seat pedestal 9 includes, for example, a rear pedestal part 10 located on the rear side and a front pedestal part 21 attached to the front side of the rear pedestal part 10. Yes. In the present embodiment, the driver seat pedestal 9 is divided into two members, that is, the rear pedestal portion 10 and the front pedestal portion 21 due to the arrangement relationship between the driver seat pedestal 9 and the engine 7. A seat pedestal can also be configured.

後側台座部位１０は、エンジン７の前側と上側を覆うものである。図６に示すように、後側台座部位１０は、エンジン７の前側から旋回フレーム５に立設された前面板１１を有している。前面板１１の上側には、エンジン７を覆う位置で、後述する前側台座部位２１の座席取付板２３の後部を支持することにより、この座席取付板２３の一部として座席２６が取付けられる取付台１２Ａ，１２Ｂが左，右方向に間隔をもって設けられている。さらに、後側台座部位１０には、前面板１１の上部から後側に延びた平板状の取付板１３が設けられている。この取付板１３は、例えばカウンタウエイト６の上面部に取付けられる。 The rear pedestal portion 10 covers the front side and the upper side of the engine 7. As shown in FIG. 6, the rear pedestal portion 10 has a front plate 11 erected on the revolving frame 5 from the front side of the engine 7. On the upper side of the front plate 11, a mounting base on which a seat 26 is attached as a part of the seat mounting plate 23 by supporting a rear portion of a seat mounting plate 23 of a front base portion 21 to be described later at a position covering the engine 7. 12A and 12B are provided at intervals in the left and right directions. Further, the rear base portion 10 is provided with a flat mounting plate 13 extending rearward from the upper portion of the front plate 11. This attachment plate 13 is attached to the upper surface part of the counterweight 6, for example.

前面板１１は、下側に位置して垂直方向に立ち上がった垂直面板１１Ａと、この垂直面板１１Ａの上部から屈曲して斜め後側に延びた傾斜面板１１Ｂとにより形成されている。傾斜面板１１Ｂの途中位置には、前述した取付台１２Ａ，１２Ｂが配置されている。また、エンジン７側となる垂直面板１１Ａの背面１１Ａ１には、後述する第１の支持部材１８、第２の支持部材１９が取付けられている。 The front plate 11 is formed by a vertical surface plate 11A that is positioned on the lower side and rises in the vertical direction, and an inclined surface plate 11B that is bent from the upper part of the vertical surface plate 11A and extends obliquely rearward. The above-described mounting bases 12A and 12B are disposed in the middle of the inclined surface plate 11B. A first support member 18 and a second support member 19 which will be described later are attached to the back surface 11A1 of the vertical surface plate 11A on the engine 7 side.

ここで、図８、図１０に示すように、前面板１１には、垂直面板１１Ａと傾斜面板１１Ｂとに亘って開口部１１Ｃが設けられている。この開口部１１Ｃは、エンジン７の前側部分、例えば、エンジン７およびエンジン７によって駆動される発電機、ポンプ等をメンテナンスするための開口となっている。開口部１１Ｃは、傾斜面板１１Ｂ側に位置して左，右方向に延びた上端縁１１Ｃ１と、垂直面板１１Ａ側に位置して左，右方向に延びた下端縁１１Ｃ２と、前記上端縁１１Ｃ１の端部と下端縁１１Ｃ２の端部とを連結するように上，下方向に延びた左端縁１１Ｃ３、右端縁１１Ｃ４とにより略長方形状の開口として構成されている。また、開口部１１Ｃは、エンジン７周りのメンテナンスを効率よく行うことができるように、大きく開口している。これにより、開口部１１Ｃを閉塞するために、後述する２枚のカバー部材１４，１５が用いられている。 Here, as shown in FIGS. 8 and 10, the front plate 11 is provided with an opening 11C across the vertical surface plate 11A and the inclined surface plate 11B. The opening 11C is an opening for maintaining the front side portion of the engine 7, for example, the engine 7 and a generator driven by the engine 7, a pump, and the like. The opening 11C is located on the inclined surface plate 11B side and extends in the left and right directions, the upper end edge 11C1 is positioned on the vertical surface plate 11A side and extends in the left and right directions, and the upper end edge 11C1. A left end edge 11C3 and a right end edge 11C4 extending upward and downward so as to connect the end and the end of the lower end edge 11C2 constitute a substantially rectangular opening. Further, the opening 11C is greatly opened so that maintenance around the engine 7 can be performed efficiently. Accordingly, two cover members 14 and 15 described later are used to close the opening 11C.

さらに、前面板１１の傾斜面板１１Ｂには、開口部１１Ｃの上側に位置して複数個、例えば、左，右方向に間隔をもって３個のめねじ孔１１Ｄが設けられている。この３個のめねじ孔１１Ｄは、固定部材のボルト孔を構成するもので、カバー部材１４，１５を取付けるときに、後述のカバーボルト２０が螺着されるものである。 In addition, the inclined surface plate 11B of the front plate 11 is provided with a plurality of, for example, three female screw holes 11D with an interval in the left and right directions, located above the opening 11C. The three female screw holes 11D constitute bolt holes of the fixing member, and a cover bolt 20 described later is screwed when the cover members 14 and 15 are attached.

左取付台１２Ａ、右取付台１２Ｂは、前面板１１の傾斜面板１１Ｂを挟む位置に配置されている。左取付台１２Ａ，右取付台１２Ｂには、めねじ孔１２Ａ１，１２Ｂ１が上，下方向に設けられている。このめねじ孔１２Ａ１，１２Ｂ１は、後側台座部位１０の前側に前側台座部位２１を取付けるときに、後述の連結ボルト２４が螺着されるものである。 The left mounting base 12 A and the right mounting base 12 B are disposed at positions sandwiching the inclined surface plate 11 B of the front plate 11. The left mounting base 12A and the right mounting base 12B are provided with female screw holes 12A1 and 12B1 in the upward and downward directions. The female screw holes 12A1 and 12B1 are for screwing connection bolts 24, which will be described later, when the front pedestal part 21 is attached to the front side of the rear pedestal part 10.

第１のカバー部材１４は、後側台座部位１０の前面板１１に設けられた開口部１１Ｃの右側部分を覆うように前面板１１に着脱可能に取付けられている。また、第２のカバー部材１５は、開口部１１Ｃの左側部分を覆うように第１のカバー部材１４と左，右方向の左側に並ぶように前面板１１に着脱可能に取付けられている。これにより、第１のカバー部材１４と第２のカバー部材１５は、協働して開口部１１Ｃを閉塞するものである。 The first cover member 14 is detachably attached to the front plate 11 so as to cover the right side portion of the opening 11C provided in the front plate 11 of the rear pedestal portion 10. The second cover member 15 is detachably attached to the front plate 11 so as to be arranged on the left side in the left and right directions with the first cover member 14 so as to cover the left side portion of the opening 11C. Thus, the first cover member 14 and the second cover member 15 cooperate to close the opening 11C.

第１のカバー部材１４は、前面板１１の垂直面板１１Ａに対面する垂直部位１４Ａと、前記垂直部位１４Ａの上端縁から斜め後側に延びて傾斜面板１１Ｂに対面する傾斜部位１４Ｂとにより形成されている。第１のカバー部材１４には、垂直部位１４Ａの上側寄りに位置して膨出部１４Ｃが設けられている。この膨出部１４Ｃは、前側に膨らむことによりエンジン７の一部が干渉しないように回避するものである。 The first cover member 14 is formed by a vertical portion 14A facing the vertical surface plate 11A of the front plate 11 and an inclined portion 14B extending diagonally rearward from the upper edge of the vertical portion 14A and facing the inclined surface plate 11B. ing. The first cover member 14 is provided with a bulging portion 14C located near the upper side of the vertical portion 14A. The bulging portion 14C is to avoid a part of the engine 7 from interfering with the bulging to the front side.

図１１に示すように、垂直部位１４Ａの下側位置には、左，右方向の右側に位置して後述する第１の爪部１６が取付けられている。また、傾斜部位１４Ｂの上側位置には、左側および右側に位置してボルト挿通孔１４Ｄが設けられている。この２個のボルト挿通孔１４Ｄは、第１のカバー部材１４を前面板１１に対し所定の取付位置に配置したときに右側と中央に位置する２個のめねじ孔１１Ｄと連通するものである。 As shown in FIG. 11, a first claw portion 16 to be described later is attached to the lower side position of the vertical portion 14 A and located on the right side in the left and right directions. Also, bolt insertion holes 14D are provided on the left side and the right side above the inclined portion 14B. The two bolt insertion holes 14D communicate with the two female screw holes 11D located on the right side and the center when the first cover member 14 is disposed at a predetermined mounting position with respect to the front plate 11. .

第２のカバー部材１５は、前面板１１の開口部１１Ｃの左側部分を覆うように前面板１１に着脱可能に取付けられている。第２のカバー部材１５は、第１のカバー部材１４とほぼ同様に、前面板１１の垂直面板１１Ａに対面する垂直部位１５Ａと、前記垂直部位１５Ａの上端縁から斜め後側に延びて傾斜面板１１Ｂに対面する傾斜部位１５Ｂとにより形成されている。 The second cover member 15 is detachably attached to the front plate 11 so as to cover the left side portion of the opening 11C of the front plate 11. The second cover member 15 includes a vertical portion 15A facing the vertical surface plate 11A of the front plate 11 and an inclined surface plate extending obliquely rearward from the upper edge of the vertical portion 15A in substantially the same manner as the first cover member 14. 11B and the inclined part 15B which faces 11B.

ここで、第２のカバー部材１５には、エンジン７と反対側となる前側に重なるように固定板部１５Ｃが設けられている。この固定板部１５Ｃは、垂直部位１５Ａ、傾斜部位１５Ｂの右端部から右側にはみ出すように垂直部位１５Ａ、傾斜部位１５Ｂに一体的に固着されている。固定板部１５Ｃは、第２のカバー部材１５を前面板１１に取付けたときに、第１のカバー部材１４の左側部分を前面板１１に押付けて固定することができる。しかも、固定板部１５Ｃは、第１のカバー部材１４の左側部分に重なることにより、密閉性を高めることができ、第１のカバー部材１４と第２のカバー部材１５との間からエンジン７の熱や騒音が漏れ出るのを抑制することができる。 Here, the second cover member 15 is provided with a fixing plate portion 15 C so as to overlap the front side opposite to the engine 7. The fixing plate portion 15C is integrally fixed to the vertical portion 15A and the inclined portion 15B so as to protrude rightward from the right end portion of the vertical portion 15A and the inclined portion 15B. The fixing plate portion 15 C can fix the left side portion of the first cover member 14 against the front plate 11 when the second cover member 15 is attached to the front plate 11. In addition, the fixing plate portion 15 C overlaps with the left side portion of the first cover member 14, so that the sealing performance can be improved, and the engine 7 is interposed between the first cover member 14 and the second cover member 15. The leakage of heat and noise can be suppressed.

垂直部位１５Ａの下側位置には、中央部の左寄りに位置して後述する第２の爪部１７が取付けられている。また、傾斜部位１５Ｂおよび固定板部１５Ｃの上側位置には、左，右方向に間隔をもってボルト挿通孔１５Ｄが設けられている。このボルト挿通孔１５Ｄは、第２のカバー部材１５を前面板１１に対し所定の取付位置に配置したときに、中央と左側に位置する２個のめねじ孔１１Ｄと連通するものである。 A second claw portion 17 which will be described later is attached to the lower position of the vertical portion 15A and is located on the left side of the central portion. In addition, bolt insertion holes 15D are provided at positions above the inclined portion 15B and the fixed plate portion 15C with a spacing in the left and right directions. The bolt insertion hole 15D communicates with the two female screw holes 11D located at the center and the left side when the second cover member 15 is disposed at a predetermined mounting position with respect to the front plate 11.

第１の爪部１６は、第１のカバー部材１４の下端部で左，右方向の右側、即ち、垂直部位１４Ａの背面側（前面板１１側）の右側位置に設けられている。第１の爪部１６は、長方形状の板体をクランク状に折曲げることにより形成されている。第１の爪部１６は、膨出部１４Ｃの下側に位置して垂直部位１４Ａに溶接等の手段を用いて固着された固着部１６Ａと、前記固着部１６Ａの下端から屈曲して水平方向に延びた水平部１６Ｂと、前記水平部１６Ｂの先端から屈曲して下向きに延びた係合爪１６Ｃとにより構成されている。 The first claw portion 16 is provided at the lower end portion of the first cover member 14 on the right side in the left and right directions, that is, on the right side position on the back side (front plate 11 side) of the vertical portion 14A. The first claw portion 16 is formed by bending a rectangular plate into a crank shape. The first claw portion 16 is positioned below the bulging portion 14C and fixed to the vertical portion 14A by means of welding or the like, and is bent from the lower end of the fixing portion 16A to be horizontally aligned A horizontal portion 16B extending inward, and an engaging claw 16C bent downward from the tip of the horizontal portion 16B and extending downward.

ここで、係合爪１６Ｃの厚さ寸法（板厚寸法）は、後述する第１の支持部材１８の第１の爪受け部１８Ｃを構成する固定溝部１８Ｃ２の溝幅方向となる隙間寸法Ｗ２よりも僅かに小さな寸法に設定されている。これにより、係合爪１６Ｃが固定溝部１８Ｃ２に差し込まれた状態では、係合爪１６Ｃのガタつきを抑えることができ、第１のカバー部材１４の下側部分を正確な位置に安定的に固定することができる。 Here, the thickness dimension (plate thickness dimension) of the engaging claw 16C is larger than the gap dimension W2 in the groove width direction of the fixed groove part 18C2 constituting the first claw receiving part 18C of the first support member 18 described later. Are set to slightly smaller dimensions. Thereby, in a state where the engaging claw 16C is inserted into the fixing groove 18C2, the rattling of the engaging claw 16C can be suppressed, and the lower portion of the first cover member 14 is stably fixed at an accurate position. can do.

また、第１の爪部１６は、第１の支持部材１８の第１の爪受け部１８Ｃに差し込まれたときに、水平部１６Ｂが第１の支持部材１８に当接されることにより、第１のカバー部材１４を上，下方向に位置決めすることができる。 Further, when the first claw portion 16 is inserted into the first claw receiving portion 18C of the first support member 18, the horizontal portion 16B comes into contact with the first support member 18, thereby One cover member 14 can be positioned upward and downward.

図１２に示すように、第２の爪部１７は、第２のカバー部材１５の下端部、即ち、垂直部位１５Ａの背面側（前面板１１側）の中央位置に設けられている。第２の爪部１７は、前述した第１の爪部１６と同様に、長方形状の板体をクランク状に折曲げることにより、固着部１７Ａ、水平部１７Ｂおよび係合爪１７Ｃとを備えている。係合爪１７Ｃの厚さ寸法（板厚寸法）は、後述する第２の支持部材１９の第２の爪受け部１９Ｃの隙間寸法Ｗ３よりも僅かに小さな寸法に設定されている。これにより、係合爪１７Ｃが第２の爪受け部１９Ｃに差し込まれた状態では、係合爪１７Ｃのガタつきを抑えることができ、第２のカバー部材１５の下側部分を正確な位置に安定的に固定することができる。 As shown in FIG. 12, the 2nd nail | claw part 17 is provided in the lower end part of the 2nd cover member 15, ie, the center position of the back side (front plate 11 side) of the vertical part 15A. Similar to the first claw portion 16 described above, the second claw portion 17 includes a fixing portion 17A, a horizontal portion 17B, and an engagement claw 17C by bending a rectangular plate body into a crank shape. Yes. The thickness dimension (plate thickness dimension) of the engaging claw 17C is set to be slightly smaller than the gap dimension W3 of the second claw receiving portion 19C of the second support member 19 described later. As a result, in a state where the engaging claw 17C is inserted into the second claw receiving portion 19C, the rattling of the engaging claw 17C can be suppressed, and the lower portion of the second cover member 15 is brought to an accurate position. It can be fixed stably.

次に、前述した第１の爪部１６が係合する第１の爪受け部１８Ｃを有する第１の支持部材１８と前述した第２の爪部１７が係合する第２の爪受け部１９Ｃを有する第２の支持部材１９との構成について、図８ないし図１０を参照しつつ説明する。本実施の形態では、第１の支持部材１８と第２の支持部材１９は、左，右方向に離間して別個に設ける構成とした場合を例示している。 Next, the first support member 18 having the first claw receiving portion 18C with which the first claw portion 16 is engaged and the second claw receiving portion 19C with which the second claw portion 17 is engaged. A configuration with the second support member 19 having the above will be described with reference to FIGS. 8 to 10. In the present embodiment, the case where the first support member 18 and the second support member 19 are separately provided in the left and right directions is illustrated.

図８ないし図１０に示すように、第１の支持部材１８は、前面板１１に形成された開口部１１Ｃの右下位置で、前面板１１のエンジン７側である前記前面板１１の垂直面板１１Ａの背面１１Ａ１に設けられている。この第１の支持部材１８は、後述する第２の支持部材１９とは別個に設けられている。図９に示すように、第１の支持部材１８は、長方形状の板体をアングル状に折曲げることにより形成されている。第１の支持部材１８は、開口部１１Ｃの下端縁１１Ｃ２の下側に位置して垂直面板１１Ａの背面１１Ａ１に溶接等の手段を用いて固着された固着部１８Ａと、前記固着部１８Ａの上端から屈曲して水平方向に延びた溝形成部１８Ｂと、前記溝形成部１８Ｂに形成された第１の爪受け部１８Ｃとにより構成されている。 As shown in FIGS. 8 to 10, the first support member 18 is a vertical face plate of the front plate 11 that is on the engine 7 side of the front plate 11 at the lower right position of the opening 11 C formed in the front plate 11. It is provided on the back surface 11A1 of 11A. The first support member 18 is provided separately from a second support member 19 described later. As shown in FIG. 9, the first support member 18 is formed by bending a rectangular plate into an angle. The first support member 18 is positioned below the lower end edge 11C2 of the opening 11C and is fixed to the back surface 11A1 of the vertical surface plate 11A by means of welding or the like, and the upper end of the fixing portion 18A. The groove forming portion 18B is bent and extended in the horizontal direction, and the first claw receiving portion 18C is formed in the groove forming portion 18B.

ここで、第１の支持部材１８は、第１の爪受け部１８Ｃに第１の爪部１６を差し込んだ状態で、この第１の爪部１６を左，右方向に移動できるような長さ寸法（左，右方向寸法）に設定されている。例えば、第１の爪受け部１８Ｃの長さ寸法は、第１の爪部１６の左，右方向の幅寸法よりも数倍程度大きな寸法に設定されている。 Here, the first support member 18 has such a length that the first claw portion 16 can be moved in the left and right directions in a state where the first claw portion 16 is inserted into the first claw receiving portion 18C. The dimensions (left and right dimensions) are set. For example, the length dimension of the first claw receiving part 18C is set to a dimension several times larger than the width dimension of the first claw part 16 in the left and right directions.

図１０に示すように、第１の爪受け部１８Ｃは、左，右方向に長尺な貫通長溝として形成されている。第１の爪受け部１８Ｃは、左，右方向の一側となる左側で隙間寸法Ｗ１が大きく、他側となる右側で隙間寸法Ｗ２が小さくなるように楔状に形成されている。具体的には、楔状をした第１の爪受け部１８Ｃは、左，右方向の左側が大きな隙間寸法Ｗ１を有した差込み溝部１８Ｃ１となり、左，右方向の右側が隙間寸法Ｗ１よりも小さな隙間寸法Ｗ２を有する固定溝部１８Ｃ２となっている。差込み溝部１８Ｃ１と固定溝部１８Ｃ２との間は、隙間寸法が漸次小さくなる傾斜溝部１８Ｃ３となっている。 As shown in FIG. 10, the first claw receiving portion 18C is formed as a long through groove that is long in the left and right directions. The first claw receiving portion 18C is formed in a wedge shape so that the gap dimension W1 is large on the left side which is one side in the left and right directions and the gap dimension W2 is small on the right side which is the other side. Specifically, the first claw-receiving portion 18C having a wedge shape has an insertion groove 18C1 having a large gap dimension W1 on the left side in the left and right directions, and a gap in which the right side in the left and right directions is smaller than the gap dimension W1. The fixed groove 18C2 has a dimension W2. Between the insertion groove 18C1 and the fixed groove 18C2, there is an inclined groove 18C3 in which the gap dimension gradually decreases.

この場合、第１の爪受け部１８Ｃの溝形状は、開口部１１Ｃと反対側（後側）が直線状に形成され、開口部１１Ｃ側（前側）が適宜に屈曲して形成されている。これは、第１のカバー部材１４を組付ける際、第１のカバー部材１４が前面板１１に当接した位置よりも後側にずれることがないためである。これにより、第１の爪受け部１８Ｃの差込み溝部１８Ｃ１では、第１の爪部１６の係合爪１６Ｃが前面板１１から離れる方向に位置ずれしても、この係合爪１６Ｃを受け入れることができる。 In this case, the groove shape of the first claw receiving portion 18C is formed such that the opposite side (rear side) to the opening 11C is linear, and the opening 11C side (front side) is appropriately bent. This is because when the first cover member 14 is assembled, the first cover member 14 is not displaced rearward from the position where the first cover member 14 is in contact with the front plate 11. Thereby, in the insertion groove 18C1 of the first claw receiving part 18C, even if the engagement claw 16C of the first claw part 16 is displaced in the direction away from the front plate 11, the engagement claw 16C can be received. it can.

そして、第１の爪受け部１８Ｃでは、差込み溝部１８Ｃ１に差し込まれた係合爪１６Ｃを、傾斜溝部１８Ｃ３を介して固定溝部１８Ｃ２まで右側に移動させることにより、この固定溝部１８Ｃ２によって係合爪１６Ｃを固定することができる。このときに、第１の爪受け部１８Ｃは、第１の爪部１６を後側に移動させているから、第１のカバー部材１４の下側部分を前面板１１に対して密着して取付けることができる。 In the first claw receiving portion 18C, the engaging claw 16C inserted into the insertion groove portion 18C1 is moved to the right side through the inclined groove portion 18C3 to the fixed groove portion 18C2, whereby the engaging claw 16C is moved by the fixed groove portion 18C2. Can be fixed. At this time, since the first claw receiving portion 18C moves the first claw portion 16 to the rear side, the lower portion of the first cover member 14 is attached in close contact with the front plate 11. be able to.

第２の支持部材１９は、第１の支持部材１８から左側に離間するように前面板１１の開口部１１Ｃの左下位置で、前面板１１の垂直面板１１Ａの背面１１Ａ１に設けられている。この第２の支持部材１９は、第１の支持部材１８とほぼ同様に、固着部１９Ａと溝形成部１９Ｂとによりアングル状をなし、溝形成部１９Ｂには第２の爪受け部１９Ｃが形成されている。しかし、第２の支持部材１９は、第２の爪受け部１９Ｃと共に左，右方向に短尺に形成されている。詳しくは、第２の爪受け部１９Ｃは、左，右方向の長さ寸法が第２の爪部１７の係合爪１７Ｃの幅寸法よりも僅かに大きな寸法に設定されている。また、第２の爪受け部１９Ｃの隙間寸法Ｗ３は、第１の支持部材１８を構成する固定溝部１８Ｃ２の隙間寸法Ｗ２とほぼ同様に、第２の爪部１７の係合爪１７Ｃの厚さ寸法よりも僅かに大きな寸法に設定されている。 The second support member 19 is provided on the back surface 11A1 of the vertical surface plate 11A of the front plate 11 at the lower left position of the opening 11C of the front plate 11 so as to be separated from the first support member 18 to the left side. The second support member 19 is formed in an angle shape by an adhering portion 19A and a groove forming portion 19B in substantially the same manner as the first support member 18, and a second claw receiving portion 19C is formed in the groove forming portion 19B. Has been. However, the second support member 19 is formed to be short in the left and right directions together with the second claw receiving portion 19C. Specifically, the length of the second claw receiving portion 19C in the left and right directions is set to be slightly larger than the width of the engaging claw 17C of the second claw portion 17. The gap dimension W3 of the second claw receiving part 19C is substantially the same as the gap dimension W2 of the fixed groove part 18C2 constituting the first support member 18, and the thickness of the engaging claw 17C of the second claw part 17 is the same. The dimension is set to be slightly larger than the dimension.

これにより、第２の支持部材１９は、第２の爪部１７の係合爪１７Ｃが第２の爪受け部１９Ｃに差し込まれることにより、第２のカバー部材１５の下側部分を前面板１１に対して取付けることができる。この場合、第２の爪受け部１９Ｃは、第２の爪部１７の係合爪１７Ｃよりも僅かに大きいだけであるから、通常では容易に差し込むことができない。しかし、第２のカバー部材１５は、前面板１１に先に取付けられている第１のカバー部材１４に沿わせて下向きに移動させることにより、この第１のカバー部材１４をガイドにして第２の爪部１７の係合爪１７Ｃを第２の爪受け部１９Ｃに容易に差し込むことができる。 Thus, the second support member 19 is configured such that the lower portion of the second cover member 15 is moved to the front plate 11 by the engagement claw 17C of the second claw portion 17 being inserted into the second claw receiving portion 19C. Can be installed against. In this case, since the second claw receiving portion 19C is only slightly larger than the engaging claw 17C of the second claw portion 17, it cannot normally be easily inserted. However, the second cover member 15 is moved downward along the first cover member 14 previously attached to the front plate 11, so that the second cover member 15 serves as a second guide by using the first cover member 14 as a guide. The engaging claw 17C of the claw portion 17 can be easily inserted into the second claw receiving portion 19C.

３本のカバーボルト２０は、各カバー部材１４，１５の上側部分を前面板１１の開口部１１Ｃの上側に位置して前面板１１に取付けるものである。各カバーボルト２０は、前面板１１の各めねじ孔１１Ｄと共に固定部材の一部を構成している。 The three cover bolts 20 are attached to the front plate 11 such that the upper portions of the cover members 14 and 15 are positioned above the opening 11C of the front plate 11. Each cover bolt 20 constitutes a part of a fixing member together with each female screw hole 11 D of the front plate 11.

図８、図９に示すように、３本のカバーボルト２０のうち、右側に位置するカバーボルト２０は、矢示Ａで示すように、第１のカバー部材１４の右側に位置するボルト挿通孔１４Ｄに挿通され、３個のめねじ孔１１Ｄのうち、右側に位置するめねじ孔１１Ｄに螺着される。また、左側に位置するカバーボルト２０は、矢示Ｂで示すように、第２のカバー部材１５の左側のボルト挿通孔１５Ｄに挿通され、左側に位置するめねじ孔１１Ｄに螺着される。さらに、中央に位置するカバーボルト２０は、矢示Ｃで示すように、第２のカバー部材１５の右側のボルト挿通孔１５Ｄに挿通されると共に、第１のカバー部材１４の左側のボルト挿通孔１４Ｄに挿通され、中央に位置するめねじ孔１１Ｄに螺着される。 As shown in FIGS. 8 and 9, among the three cover bolts 20, the cover bolt 20 located on the right side is a bolt insertion hole located on the right side of the first cover member 14 as indicated by an arrow A. It is inserted through 14D and screwed into the female screw hole 11D located on the right side of the three female screw holes 11D. Further, as shown by arrow B, the cover bolt 20 located on the left side is inserted into the left bolt insertion hole 15D of the second cover member 15 and screwed into the female screw hole 11D located on the left side. Further, the cover bolt 20 located at the center is inserted into the bolt insertion hole 15D on the right side of the second cover member 15 as shown by an arrow C, and the bolt insertion hole on the left side of the first cover member 14 is inserted. 14D is inserted and screwed into the female screw hole 11D located in the center.

次に、第１のカバー部材１４と第２のカバー部材１５を後側台座部位１０の前面板１１に取付ける場合の手順の一例について述べる。 Next, an example of a procedure for attaching the first cover member 14 and the second cover member 15 to the front plate 11 of the rear pedestal portion 10 will be described.

図８、図９中の矢示Ｄで示すように、第１のカバー部材１４に設けられた第１の爪部１６の係合爪１６Ｃを、前面板１１に設けられた第１の支持部材１８の第１の爪受け部１８Ｃに差し込む。このときに、第１の爪受け部１８Ｃのうち、大きな隙間寸法Ｗ１をもった差込み溝部１８Ｃ１に係合爪１６Ｃを差し込むことにより、見え難い下側位置においても容易に差し込むことができる。第１の爪部１６の係合爪１６Ｃを、第１の爪受け部１８Ｃの差込み溝部１８Ｃ１に差し込んだら、第１の爪部１６を、第１のカバー部材１４と一緒に右側に移動（スライド）させる。これにより、第１の爪部１６の係合爪１６Ｃは、小さな隙間寸法Ｗ２となった固定溝部１８Ｃ２に配置される。この固定溝部１８Ｃ２では、係合爪１６Ｃを固定的に支持することができるから、第１のカバー部材１４の下側部分を前面板１１に位置決め状態で取付けることができる。 As shown by the arrow D in FIGS. 8 and 9, the engaging claw 16 C of the first claw portion 16 provided on the first cover member 14 is replaced with the first support member provided on the front plate 11. 18 is inserted into the first claw receiving portion 18C. At this time, by inserting the engaging claw 16C into the insertion groove 18C1 having a large gap dimension W1 in the first claw receiving portion 18C, it can be easily inserted even at the lower position where it is difficult to see. When the engaging claw 16C of the first claw portion 16 is inserted into the insertion groove portion 18C1 of the first claw receiving portion 18C, the first claw portion 16 is moved to the right side together with the first cover member 14 (sliding). ) Thereby, the engaging claw 16C of the first claw portion 16 is disposed in the fixed groove portion 18C2 having the small gap dimension W2. Since the engaging groove 16C can be fixedly supported by the fixing groove 18C2, the lower portion of the first cover member 14 can be attached to the front plate 11 in a positioned state.

第１のカバー部材１４の下側部分を前面板１１に取付けたら、矢示Ｅで示すように、第２の支持部材１９の第２の爪受け部１９Ｃに第２の爪部１７の係合爪１７Ｃを差し込む。このときに、第２のカバー部材１５を第１のカバー部材１４に沿って下向きに移動させることにより、第２の爪受け部１９Ｃに係合爪１７Ｃを容易に差し込むことができる。これにより、第２のカバー部材１５の下側部分を前面板１１に位置決め状態で取付けることができる。 When the lower portion of the first cover member 14 is attached to the front plate 11, as indicated by an arrow E, the second claw portion 17 is engaged with the second claw receiving portion 19 C of the second support member 19. Insert the nail 17C. At this time, by moving the second cover member 15 downward along the first cover member 14, the engaging claw 17C can be easily inserted into the second claw receiving portion 19C. Thereby, the lower part of the second cover member 15 can be attached to the front plate 11 in a positioned state.

第１のカバー部材１４の下側部分と第２のカバー部材１５の下側部分を前面板１１に取付けたら、矢示Ａ，Ｂ，Ｃで示すように、各カバーボルト２０を各ボルト挿通孔１４Ｄ，１５Ｄに挿通し、前面板１１の各めねじ孔１１Ｄに螺着する。これにより、第１のカバー部材１４の上側部分と第２のカバー部材１５の上側部分を前面板１１に取付けることができる。以上のように、各カバー部材１４，１５を前面板１１に取付けることにより、各カバー部材１４，１５によって開口部１１Ｃを気密性をもって閉塞することができ、エンジン７の熱や騒音がオペレータ側に漏れ出るのを抑制することができる。 When the lower part of the first cover member 14 and the lower part of the second cover member 15 are attached to the front plate 11, the cover bolts 20 are inserted into the bolt insertion holes as indicated by arrows A, B, C. 14D and 15D are inserted and screwed into the female screw holes 11D of the front plate 11. Thereby, the upper part of the first cover member 14 and the upper part of the second cover member 15 can be attached to the front plate 11. As described above, by attaching the cover members 14 and 15 to the front plate 11, the opening 11C can be airtightly closed by the cover members 14 and 15, and the heat and noise of the engine 7 are transferred to the operator side. Leakage can be suppressed.

図６に示すように、運転席台座９の前側台座部位２１は、後側台座部位１０の前側に取付けられるものである。前側台座部位２１は、エンジン７の前側と上側を覆いつつ、座席２６を支持するものである。前側台座部位２１は、前側に位置して旋回フレーム５に立設された前面板２２と、前面板２２の上部から後側に延びた平板状の座席取付板２３とを含んで構成されている。座席取付板２３の後部には、左，右の隅に位置してボルト挿通孔２３Ａが設けられている。 As shown in FIG. 6, the front base portion 21 of the driver seat base 9 is attached to the front side of the rear base portion 10. The front pedestal portion 21 supports the seat 26 while covering the front side and the upper side of the engine 7. The front pedestal portion 21 includes a front plate 22 that is positioned on the front side and is erected on the revolving frame 5, and a flat seat mounting plate 23 that extends rearward from the top of the front plate 22. . At the rear part of the seat mounting plate 23, bolt insertion holes 23A are provided at the left and right corners.

また、図３に示すように、座席取付板２３には、座席２６の下側に位置してメンテナンス開口２３Ｂが設けられている。このメンテナンス開口２３Ｂを開放した状態では、各カバー部材１４，１５、各カバーボルト２０を露出させることができる。さらに、各カバーボルト２０を緩めて各カバー部材１４，１５を取外すことにより、図４に示すように、前面板１１の開口部１１Ｃからエンジン７を露出させることができる。 Further, as shown in FIG. 3, the seat mounting plate 23 is provided with a maintenance opening 23 B located below the seat 26. In a state where the maintenance opening 23B is opened, the cover members 14 and 15 and the cover bolts 20 can be exposed. Further, by loosening each cover bolt 20 and removing each cover member 14, 15, the engine 7 can be exposed from the opening 11C of the front plate 11 as shown in FIG.

前側台座部位２１は、後側台座部位１０の前側に並べて配置され、前面板２２の下側が旋回フレーム５に取付けられている。一方、座席取付板２３の後側は、各ボルト挿通孔２３Ａに挿通された連結ボルト２４を、後側台座部位１０の各取付台１２Ａ，１２Ｂのめねじ孔１２Ａ１，１２Ｂ１に螺着することにより、後側台座部位１０に対し一体的に取付けることができる。 The front pedestal part 21 is arranged side by side on the front side of the rear pedestal part 10, and the lower side of the front plate 22 is attached to the revolving frame 5. On the other hand, on the rear side of the seat mounting plate 23, the connecting bolts 24 inserted into the respective bolt insertion holes 23A are screwed into the female screw holes 12A1 and 12B1 of the respective mounting bases 12A and 12B of the rear base portion 10. The rear pedestal portion 10 can be integrally attached.

足置き部材２５は、運転席台座９（前側台座部位２１）の前側に位置して旋回フレーム５に設けられている。足置き部材２５は、座席２６に着座したオペレータが足を置くスペースであり、キャブ３０内の床板を形成している。足置き部材２５の前側には、後述の走行用操作レバー・ペダル２９等が配設されている。 The footrest member 25 is located on the front side of the driver's seat pedestal 9 (front pedestal portion 21) and is provided on the turning frame 5. The footrest member 25 is a space where an operator who sits on the seat 26 places his / her foot, and forms a floor board in the cab 30. On the front side of the footrest member 25, a travel operation lever / pedal 29 described later is disposed.

図５に示すように、座席２６は、運転席台座９を構成する前側台座部位２１の座席取付板２３上に設けられている。この座席２６は、オペレータが着座する運転席を構成している。ここで、座席２６は、例えば座面の前端部が座席取付板２３の前部に上，下方向に回動可能に取付けられている。これにより、図３、図４に示すように、座席２６は、前側を支点にして前側に移動させることができ、座席取付板２３のメンテナンス開口２３Ｂを開放させることができる。 As shown in FIG. 5, the seat 26 is provided on the seat mounting plate 23 of the front pedestal portion 21 constituting the driver seat pedestal 9. The seat 26 constitutes a driver seat on which an operator is seated. Here, the seat 26 is attached to the front part of the seat mounting plate 23 so that the front end of the seat surface can be rotated upward and downward, for example. Thereby, as shown in FIGS. 3 and 4, the seat 26 can be moved to the front side with the front side as a fulcrum, and the maintenance opening 23 B of the seat mounting plate 23 can be opened.

左作業用操作レバー２７は、座席２６の左側に位置して座席取付板２３上に設けられている。一方、右作業用操作レバー２８は、座席２６の右側に位置して座席取付板２３上に設けられている。これらの作業用操作レバー２７，２８は、オペレータによって手動操作されることにより、フロント装置４等を動作させるものである。さらに、走行用操作レバー・ペダル２９は、足置き部材２５の前側に設けられ、オペレータによって手動操作または足踏み操作されることにより、下部走行体２を走行させるものである。 The left work operation lever 27 is located on the left side of the seat 26 and provided on the seat mounting plate 23. On the other hand, the right operation lever 28 is provided on the seat mounting plate 23 so as to be located on the right side of the seat 26. These operation levers 27 and 28 are operated manually by an operator to operate the front device 4 and the like. Further, the traveling operation lever / pedal 29 is provided on the front side of the footrest member 25, and causes the lower traveling body 2 to travel by being manually operated or stepped on by an operator.

キャブ３０は、座席２６等を覆うように、運転席台座９、足置き部材２５の上側に設けられている。キャブ３０は、ボックス状に形成され、その左側面には、乗降するときに開閉されるドア３１が回動可能に取付けられている。 The cab 30 is provided above the driver seat base 9 and the footrest member 25 so as to cover the seat 26 and the like. The cab 30 is formed in a box shape, and a door 31 that is opened and closed when getting on and off is rotatably attached to the left side surface thereof.

第１の実施の形態による小型の油圧ショベル１は上述の如き構成を有するもので、次に、この小型の油圧ショベル１の動作について説明する。 The small hydraulic excavator 1 according to the first embodiment has the above-described configuration. Next, the operation of the small hydraulic excavator 1 will be described.

まず、機械重量が０．７〜８トン程度の小型の油圧ショベル１は、トラックの荷台に積載された状態で作業現場まで搬送される。油圧ショベル１が作業現場に搬送されると、オペレータは、キャブ３０内に乗り込んで座席２６に着座する。この状態で走行用操作レバー・ペダル２９を操作することにより、下部走行体２を駆動して油圧ショベル１を前進または後退させることができる。一方、座席２６に着座したオペレータは、左，右の作業用操作レバー２７，２８を操作することにより、フロント装置４等を動作させて建物内部の解体作業、狭い街路地等での側溝掘り作業を行うことができる。 First, a small hydraulic excavator 1 having a machine weight of about 0.7 to 8 tons is transported to a work site while being loaded on a truck bed. When the excavator 1 is transported to the work site, the operator gets into the cab 30 and sits on the seat 26. By operating the operating lever / pedal 29 for traveling in this state, the lower traveling body 2 can be driven to move the hydraulic excavator 1 forward or backward. On the other hand, the operator seated on the seat 26 operates the left and right operation levers 27 and 28 to operate the front device 4 and the like, thereby dismantling the interior of the building and digging a ditch in a narrow street. It can be performed.

次に、エンジン７の前側部分のメンテナンスを行う場合について述べる。図３に示すように、キャブ３０内に乗り込んだ作業者は、座席２６を前側に倒し、運転席台座９を構成する前側台座部位２１の座席取付板２３のメンテナンス開口２３Ｂを開放させる。このメンテナンス開口２３Ｂから手を差し入れ、第１のカバー部材１４、第２のカバー部材１５の上側部分を固定している３本のカバーボルト２０を緩めて取外す。この状態で、第２のカバー部材１５、第１のカバー部材１４の順で引き上げることにより、図４に示すように、前面板１１の開口部１１Ｃからエンジン７の前側部分を露出させることができ、メンテナンスを施すことができる。 Next, a case where maintenance is performed on the front portion of the engine 7 will be described. As shown in FIG. 3, the operator who has entered the cab 30 tilts the seat 26 to the front side, and opens the maintenance opening 23 B of the seat mounting plate 23 of the front pedestal portion 21 constituting the driver seat pedestal 9. A hand is inserted through the maintenance opening 23B, and the three cover bolts 20 fixing the upper portions of the first cover member 14 and the second cover member 15 are loosened and removed. In this state, by pulling up the second cover member 15 and the first cover member 14 in this order, the front portion of the engine 7 can be exposed from the opening 11C of the front plate 11 as shown in FIG. Maintenance can be performed.

かくして、第１の実施の形態によれば、運転席台座９の後側台座部位１０の前面板１１に設けられエンジン７の前側部分をメンテナンスするための開口部１１Ｃと、運転席台座９の開口部１１Ｃを閉塞する位置に左，右方向に並べて設けられた第１のカバー部材１４および第２のカバー部材１５と、前記第１のカバー部材１４の下端部に設けられた第１の爪部１６と、前記第２のカバー部材１５の下端部に設けられた第２の爪部１７と、前記前面板１１の前記開口部１１Ｃの下側位置に左，右方向に延びて設けられ前記第１の爪部１６と係合する第１の爪受け部１８Ｃを有する第１の支持部材１８と、前記前面板１１の前記開口部１１Ｃの下側位置に左，右方向に延びて設けられ前記第２の爪部１７と係合する第２の爪受け部１９Ｃを有する第２の支持部材１９とを備えている。この上で、前記第１、第２のカバー部材１４，１５は、前記第１、第２の爪部１６，１７を前記第１、第２の爪受け部１８Ｃ，１９Ｃに差し込むことにより下側部分が前記前面板１１に取付けられ、上側部分が前記開口部１１Ｃの上側に位置して前記前面板１１にカバーボルト２０等を用いて取付けられる構成としている。 Thus, according to the first embodiment, the opening 11C provided on the front plate 11 of the rear base portion 10 of the driver seat base 9 for maintaining the front portion of the engine 7 and the opening of the driver seat base 9 are provided. A first cover member 14 and a second cover member 15 provided side by side in a left and right direction at a position where the portion 11C is closed, and a first claw portion provided at the lower end of the first cover member 14 16, a second claw portion 17 provided at a lower end portion of the second cover member 15, and a left side and a right direction provided at a lower position of the opening portion 11 C of the front plate 11. A first support member 18 having a first claw receiving portion 18C that engages with one claw portion 16 and a lower position of the opening 11C of the front plate 11 that extends leftward and rightward. It has the 2nd nail receiving part 19C engaged with the 2nd claw part 17 And a second supporting member 19. In addition, the first and second cover members 14 and 15 are formed on the lower side by inserting the first and second claw portions 16 and 17 into the first and second claw receiving portions 18C and 19C. A portion is attached to the front plate 11, and an upper portion is located above the opening 11C and is attached to the front plate 11 using a cover bolt 20 or the like.

従って、第１、第２のカバー部材１４，１５は、第１、第２の爪部１６，１７を運転席台座９側の第１、第２の支持部材１８，１９の第１、第２の爪受け部１８Ｃ，１９Ｃに差し込むだけの簡単な作業で、その下側部分を前面板１１に取付けることができる。これにより、手が届き難い下側位置のボルトの着脱作業を省略できるから、容易に手が届く第１、第２のカバー部材１４，１５の上側部分を、カバーボルト２０等を用いて前面板１１に取付けることができる。 Accordingly, the first and second cover members 14 and 15 have the first and second support members 18 and 19 on the driver seat base 9 side as the first and second support members 18 and 19, respectively. The lower portion can be attached to the front plate 11 by a simple operation of simply inserting the claw receiving portions 18C and 19C. This eliminates the need to attach and detach the bolt at the lower position, which is difficult to reach, so the upper portion of the first and second cover members 14 and 15 that can be easily reached by using the cover bolt 20 etc. 11 can be attached.

この結果、小型の油圧ショベル１のように、メンテナンス等の作業スペースを確保することが難しい場合でも、上側に位置するカバーボルト２０は、容易に着脱することができる。これにより、狭い作業スペースでも各カバー部材１４，１５を簡単に着脱することができ、エンジン７のメンテナンスを容易に行うことができる。 As a result, even when it is difficult to secure a work space for maintenance or the like as in the small excavator 1, the cover bolt 20 positioned on the upper side can be easily attached and detached. Thereby, each cover member 14 and 15 can be easily attached or detached even in a narrow work space, and maintenance of the engine 7 can be easily performed.

第１の支持部材１８の第１の爪受け部１８Ｃは、左，右方向の左側で隙間寸法Ｗ１が大きく、右側で小さな隙間寸法Ｗ２となるように楔状に形成された楔状爪受け部としている。従って、楔状をした第１の爪受け部１８Ｃでは、左側に位置する大きな隙間寸法Ｗ１の差込み溝部１８Ｃ１に差し込んだ第１の爪部１６を右側に移動させることにより、この第１の爪部１６を小さな隙間寸法Ｗ２の固定溝部１８Ｃ２に配置することができる。 The first claw receiving portion 18C of the first support member 18 is a wedge-shaped claw receiving portion formed in a wedge shape so that the gap dimension W1 is large on the left side in the left and right directions and the gap dimension W2 is small on the right side. . Therefore, in the wedge-shaped first claw receiving portion 18C, the first claw portion 16 is moved to the right by moving the first claw portion 16 inserted into the insertion groove portion 18C1 having a large gap dimension W1 located on the left side. Can be disposed in the fixed groove 18C2 having a small gap dimension W2.

これにより、第１の爪受け部１８Ｃのうち、大きな隙間寸法Ｗ１の差込み溝部１８Ｃ１には、第１の爪部１６を容易に差し込むことができる。この上で、小さな隙間寸法Ｗ２の固定溝部１８Ｃ２では、第１の爪部１６を位置決め状態で固定することができる。この結果、簡単な作業で各カバー部材１４，１５の下側部分を前面板１１に対して取付けることができる。 Thereby, the 1st nail | claw part 16 can be easily inserted in the insertion groove part 18C1 of the big clearance gap dimension W1 among the 1st nail | claw receiving parts 18C. In addition, the first claw portion 16 can be fixed in a positioning state with the fixing groove portion 18C2 having a small gap dimension W2. As a result, the lower portions of the cover members 14 and 15 can be attached to the front plate 11 with a simple operation.

第１、第２の支持部材１８，１９は、エンジン７側である前面板１１（垂直面板１１Ａ）の背面１１Ａ１に配置している。これにより、各カバー部材１４，１５を前面板１１に取付けた状態では、第１、第２の支持部材１８，１９を外部から見えないように隠すことができ、見栄えを良好にすることができる。 The first and second support members 18 and 19 are disposed on the back surface 11A1 of the front plate 11 (vertical surface plate 11A) on the engine 7 side. Thereby, in the state which attached each cover member 14 and 15 to the front plate 11, the 1st, 2nd support members 18 and 19 can be concealed so that it cannot be seen from the outside, and appearance can be made favorable. .

固定部材は、前面板１１に設けられためねじ孔１１Ｄと、第１、第２のカバー部材１４，１５を前面板１１のめねじ孔１１Ｄに締着されるカバーボルト２０とにより構成している。これにより、カバーボルト２０は、簡単な作業で着脱することができる。 Since the fixing member is provided in the front plate 11, the screw hole 11D and the first and second cover members 14 and 15 are constituted by cover bolts 20 fastened to the female screw holes 11D of the front plate 11. . Thereby, the cover bolt 20 can be attached and detached with a simple operation.

さらに、第１の支持部材１８と第２の支持部材１９は、左，右方向に離間して別個に設けているから、第１の支持部材１８と第２の支持部材１９との間隔寸法を適宜に設定することができる。 Further, since the first support member 18 and the second support member 19 are separately provided in the left and right directions, the distance between the first support member 18 and the second support member 19 is set. It can be set appropriately.

次に、図１３および図１４は本発明の第２の実施の形態を示している。本実施の形態の特徴は、前面板の開口部の下側位置には、第１の爪部と第２の爪部を設け、第１のカバー部材の下端部には、第１の爪受け部を有する第１の支持部材を設け、第２のカバー部材の下端部には、第２の爪受け部を有する第２の支持部材を設ける構成としたことにある。なお、本実施の形態では、前述した第１の実施の形態と同一の構成要素に同一の符号を付し、その説明を省略するものとする。また、各カバー部材の取付手順もほぼ同様であるために省略する。 Next, FIG. 13 and FIG. 14 show a second embodiment of the present invention. A feature of the present embodiment is that a first claw portion and a second claw portion are provided at a lower position of the opening portion of the front plate, and a first claw holder is provided at a lower end portion of the first cover member. A first support member having a second portion is provided, and a second support member having a second claw receiving portion is provided at the lower end portion of the second cover member. In the present embodiment, the same components as those in the first embodiment described above are denoted by the same reference numerals, and the description thereof is omitted. Further, the procedure for attaching each cover member is substantially the same, and is omitted.

図１３、図１４において、第１の爪部４１は、前面板１１に形成された開口部１１Ｃの右下位置で、前面板１１の垂直面板１１Ａの背面１１Ａ１に設けられている。この第１の爪部４１は、第１の実施の形態による第１の爪部１６を上，下方向で反転して用いている。 13 and 14, the first claw portion 41 is provided on the back surface 11 A 1 of the vertical surface plate 11 A of the front plate 11 at the lower right position of the opening 11 C formed in the front plate 11. The first claw portion 41 uses the first claw portion 16 according to the first embodiment inverted in the upward and downward directions.

第２の爪部４２は、第１の爪部４１から左側に離間するように前面板１１の開口部１１Ｃの左下位置で、前面板１１の垂直面板１１Ａの背面１１Ａ１に設けられている。この第２の爪部４２にも、第１の実施の形態による第１の爪部１６を上，下方向で反転したものが用いられている。 The second claw portion 42 is provided on the back surface 11A1 of the vertical surface plate 11A of the front plate 11 at a lower left position of the opening portion 11C of the front plate 11 so as to be separated from the first claw portion 41 to the left side. As the second claw portion 42, the first claw portion 16 according to the first embodiment inverted in the upward and downward directions is used.

第１の支持部材４３は、第１のカバー部材１４の下端部で左，右方向の右側、即ち、垂直部位１４Ａの背面側の右側位置に設けられている。第１の支持部材４３は、第１の実施の形態による第１の支持部材１８を上，下方向で反転して用いている。これにより、第１の爪受け部４３Ａは左，右方向で逆向きとなっている。この第１の爪受け部４３Ａには、第１の爪部４１が左，右方向に移動可能に差し込まれる。第１の爪受け部４３Ａは、左，右方向で反対となっている以外は、第１の実施の形態による第１の爪受け部１８Ｃと同様であるため、その隙間寸法等の説明を省略するものとする。 The first support member 43 is provided on the right side in the left and right directions at the lower end of the first cover member 14, that is, on the right side position on the back side of the vertical portion 14A. The first support member 43 uses the first support member 18 according to the first embodiment inverted in the upward and downward directions. As a result, the first claw receiving portion 43A is reversed in the left and right directions. The first claw receiving portion 43A is inserted into the first claw receiving portion 43A so as to be movable in the left and right directions. Since the first claw receiving portion 43A is the same as the first claw receiving portion 18C according to the first embodiment except that the first claw receiving portion 43A is opposite in the left and right directions, description of the gap size and the like is omitted. It shall be.

第２の支持部材４４は、第２のカバー部材１５の垂直部位１５Ａの背面側の中央位置に設けられている。第２の支持部材４４は、第１の実施の形態による第２の支持部材１９を上，下方向で反転して用いている。第２の爪受け部４４Ａは、第１の実施の形態による第２の爪受け部１９Ｃと同様に形成されている。 The second support member 44 is provided at the center position on the back side of the vertical portion 15 A of the second cover member 15. The second support member 44 uses the second support member 19 according to the first embodiment by being inverted in the upward and downward directions. The second claw receiving portion 44A is formed in the same manner as the second claw receiving portion 19C according to the first embodiment.

かくして、このように構成された第２の実施の形態でも、前述した第１の実施の形態とほぼ同様に、第１、第２のカバー部材１４，１５は、第１、第２の支持部材４３，４４の第１、第２の爪受け部４３Ａ，４４Ａに第１、第２の爪部４１，４２を差し込むだけの簡単な作業で、その下側部分を前面板１１に取付けることができる。 Thus, also in the second embodiment configured as described above, the first and second cover members 14 and 15 are the first and second support members in substantially the same manner as the first embodiment described above. The lower part can be attached to the front plate 11 by simply inserting the first and second claw portions 41 and 42 into the first and second claw receiving portions 43A and 44A of 43 and 44. .

なお、第１の実施の形態では、第１の支持部材１８と第２の支持部材１９は、左，右方向に離間して別個に設ける構成とした場合を例に挙げて説明した。しかし、本発明はこれに限らず、例えば図１５に示す変形例のように構成してもよい。即ち、図１５の変形例では、第１の支持部材５１と第２の支持部材５２は、第１の爪受け部５１Ａと第２の爪受け部５２Ａが左，右方向に離間して設けられた単一の支持部材５３として形成してもよい。これにより、部品点数の削減により組立作業性を向上することができる。 In the first embodiment, the case where the first support member 18 and the second support member 19 are separately provided in the left and right directions has been described as an example. However, the present invention is not limited to this. For example, the present invention may be configured as a modification shown in FIG. That is, in the modification of FIG. 15, the first support member 51 and the second support member 52 are provided such that the first claw receiving portion 51A and the second claw receiving portion 52A are spaced apart in the left and right directions. Alternatively, a single support member 53 may be formed. Thereby, assembly workability | operativity can be improved by reduction of a number of parts.

第１の実施の形態では、前面板１１には、固定部材のボルト孔としてめねじ孔１１Ｄを設け、このめねじ孔１１Ｄにカバーボルト２０を螺着することにより、各カバー部材１４，１５の上側部分を前面板１１に取付ける構成としている。しかし、本発明はこれに限らず、例えば、前面板には、固定部材のボルト孔としてボルト挿通孔を設け、ボルト挿通孔に挿通したボルトとナットによって各カバー部材の上側部分を前面板に取付ける構成としてもよい。この構成は、第２の実施の形態にも適用することができる。 In the first embodiment, the front plate 11 is provided with a female screw hole 11D as a bolt hole of a fixing member, and a cover bolt 20 is screwed into the female screw hole 11D, whereby each of the cover members 14 and 15 is provided. The upper portion is attached to the front plate 11. However, the present invention is not limited to this. For example, the front plate is provided with a bolt insertion hole as a bolt hole of the fixing member, and the upper portion of each cover member is attached to the front plate by the bolt and nut inserted into the bolt insertion hole. It is good also as a structure. This configuration can also be applied to the second embodiment.

第１の実施の形態では、運転席台座９を、後側台座部位１０と前側台座部位２１との２部材から構成した場合を例示している。しかし、本発明はこれに限らず、単一の運転席台座に前面板と座席取付板とを設ける構成としてもよい。この構成は、第２の実施の形態にも同様に適用できるものである。 In 1st Embodiment, the case where the driver's seat base 9 is comprised from 2 members of the back side base part 10 and the front side base part 21 is illustrated. However, the present invention is not limited to this, and a front driver plate and a seat mounting plate may be provided on a single driver seat base. This configuration can be similarly applied to the second embodiment.

各実施の形態では、運転席台座９、足置き部材２５上にキャブ３０を備えたキャブ仕様の小型の油圧ショベル１を例示している。しかし、本発明はこれに限るものではなく、運転席台座上にキャノピを備えたキャノピ仕様の小型の油圧ショベルに適用することもできる。 In each embodiment, the small cab-type hydraulic excavator 1 including the cab 30 on the driver seat base 9 and the footrest member 25 is illustrated. However, the present invention is not limited to this, and can be applied to a small hydraulic excavator having a canopy specification in which a canopy is provided on a driver seat base.

各実施の形態では、小型の建設機械としてクローラ式の油圧ショベル１を例に挙げて説明した。しかし、本発明はこれに限るものではなく、例えばホイール式の下部走行体を備えた小型の油圧ショベルに適用してもよい。さらに、例えば油圧クレーン等の他の小型の建設機械にも広く適用できるものである。 In each embodiment, the crawler type hydraulic excavator 1 is described as an example as a small construction machine. However, the present invention is not limited to this, and may be applied to, for example, a small hydraulic excavator provided with a wheel type lower traveling body. Further, it can be widely applied to other small construction machines such as a hydraulic crane.

１小型の油圧ショベル（小型の建設機械）
２下部走行体
３上部旋回体
４フロント装置
５旋回フレーム
６カウンタウエイト
７エンジン（原動機）
８油圧ポンプ
９運転席台座
１０後側台座部位
１１，２２前面板
１１Ａ垂直面板
１１Ａ１背面
１１Ｃ開口部
１１Ｄめねじ孔（固定部材、ボルト孔）
１２Ａ，１２Ｂ取付台
１４第１のカバー部材
１４Ｄ，１５Ｄボルト挿通孔（固定部材）
１５第２のカバー部材
１６，４１第１の爪部
１７，４２第２の爪部
１８，４３，５１第１の支持部材
１８Ｃ，４３Ａ，５１Ａ第１の爪受け部
１８Ｃ１差込み溝部
１８Ｃ２固定溝部
１９，４４，５２第２の支持部材
１９Ｃ，４４Ａ，５２Ａ第２の爪受け部
２０カバーボルト（固定部材）
２１前側台座部位
２３座席取付板
２３Ｂメンテナンス開口
２５足置き部材
２６座席
５３単一の支持部材
Ｗ１差込溝部の隙間寸法
Ｗ２固定溝部の隙間寸法 1 Small excavator (small construction machine)
2 Lower traveling body 3 Upper turning body 4 Front device 5 Turning frame 6 Counterweight 7 Engine (prime mover)
DESCRIPTION OF SYMBOLS 8 Hydraulic pump 9 Driver's seat base 10 Rear side base part 11, 22 Front plate 11A Vertical surface plate 11A1 Back surface 11C Opening 11D Female thread hole (fixing member, bolt hole)
12A, 12B Mounting base 14 First cover member 14D, 15D Bolt insertion hole (fixing member)
15 2nd cover member 16,41 1st nail | claw part 17,42 2nd claw part 18,43,51 1st support member 18C, 43A, 51A 1st nail | claw receiving part 18C1 insertion groove part 18C2 fixed groove part 19 , 44, 52 Second support member 19C, 44A, 52A Second claw receiving portion 20 Cover bolt (fixing member)
21 Front pedestal part 23 Seat mounting plate 23B Maintenance opening 25 Foot rest member 26 Seat 53 Single support member W1 Gap size of insertion groove W2 Gap size of fixed groove

Claims

A self-propelled lower traveling body, an upper revolving body mounted on the lower traveling body so as to be able to swivel, and a front device provided so as to be able to move up and down on the front side in the front and rear directions of the upper revolving body ,
The upper swing body is
A swivel frame forming a support structure;
A counterweight attached to the rear side of the swivel frame to balance the weight with the front device;
A prime mover for driving a hydraulic pump, mounted in a lateral state extending in the left and right directions on the rear side of the swivel frame and positioned on the front side of the counterweight;
A driver's seat pedestal comprising a front plate erected on the revolving frame from the front side of the prime mover and a seat mounting plate that extends from the upper part of the front plate to the rear side and covers the upper side of the prime mover and to which a seat is attached;
In a small construction machine comprising a footrest member provided on the swivel frame located on the front side of the driver seat pedestal,
An opening for maintaining a front portion of the prime mover provided on the front plate of the driver seat pedestal;
A first cover member and a second cover member provided side by side in a left and right direction at a position to close the opening of the driver seat pedestal;
A first claw portion provided at one of the lower end portion of the first cover member and the lower position of the opening of the front plate;
A second claw portion provided at one of the lower end portion of the second cover member and the lower position of the opening of the front plate;
The first cover member extends in the left and right directions at the other part of the lower end portion of the first cover member and the lower position of the opening of the front plate, and is engaged with the first claw portion. A first support member having a nail receiver;
The second cover member extends in the left and right directions at the other portion of the lower end portion of the second cover member and the lower position of the opening portion of the front plate and is engaged with the second claw portion. A second support member having a nail receiver,
The first and second cover members are attached to the front plate by inserting the first and second claw portions into the first and second claw receiving portions, respectively, and the upper portion is It is configured to be attached to the front plate using a fixing member located above the opening ,
The claw receiving portion of at least one of the first and second support members has a wedge-shaped claw formed in a wedge shape so that the gap dimension is large on one side in the left and right directions and small on the other side. As a receiving part,
The lower part of the cover member is attached to the front plate by moving the one claw part inserted into one side of the wedge-shaped claw receiving part to the other side in the left and right directions. A small construction machine.

The small construction machine according to claim 1, wherein the first and second support members or the first and second claw portions are arranged on a back surface of the front plate on the prime mover side.

The fixing member includes a bolt hole provided in the front plate, and a bolt or a bolt and nut fastened to the bolt hole for fastening the first and second cover members to the front plate. The small-sized construction machine according to claim 1 constituted.

The first support member and the second support member are formed as a single support member in which the first claw receiving portion and the second claw receiving portion are spaced apart in the left and right directions. The small construction machine according to claim 1.

The small construction machine according to claim 1, wherein the first support member and the second support member are separately provided separately in the left and right directions.