JP2010189992A - Dustproofing device for inlet of outside air for working machine - Google Patents

Dustproofing device for inlet of outside air for working machine Download PDF

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JP2010189992A
JP2010189992A JP2009037841A JP2009037841A JP2010189992A JP 2010189992 A JP2010189992 A JP 2010189992A JP 2009037841 A JP2009037841 A JP 2009037841A JP 2009037841 A JP2009037841 A JP 2009037841A JP 2010189992 A JP2010189992 A JP 2010189992A
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mesh member
outside air
drive mechanism
mesh
punching metal
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Yoshio Kawachi
芳男 河内
Masatsugu Hayashi
正嗣 林
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Caterpillar Japan Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a dustproofing device for an inlet of outside air without any problem in durability nor in dustproof efficiency, which can be compact installed. <P>SOLUTION: The dustproofing device for the inlet of the outside air for a working machine includes: a net-like member 2 covering the inlet 1 of the outside air formed in an exterior cover; a supporting mechanism 3 supporting the net-like member 2 so that at least one end part of the net-like member can freely project outward; a drive mechanism 4 applying only a pushing force to allow the projectable end part to project outward; and an elastic body 5 applying a tensile force in the direction opposite to the direction of the projection to the projectable end part. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

この発明は、作業機械の外気吸入口用防塵装置に関する。   The present invention relates to a dustproof device for an outside air inlet of a work machine.

ブルドーザや油圧ショベル等の作業機械においては、エンジンや熱交換器を空冷するために、外装カバーに外気吸入口を形成し、そこから空気を取り入れ、内部を循環させる構造が一般的である。   In a working machine such as a bulldozer or a hydraulic excavator, in order to air-cool an engine or a heat exchanger, an outside air intake port is formed in an outer cover, air is taken in from the outside, and the inside is circulated.

このような空冷構造では、外部からの空気には、塵や埃等が混入することもあり、それらが熱交換器の隙間等に堆積することになるので、その防止のために、空気流通路の上流側にネットやスクリーン等の網目状部材を配置するものとなっている。網目状部材の配置箇所としては、清掃の容易さ等の理由から、外装カバーの外気吸入口に取り付ける構造も種々提案されている(特許文献1〜2)。そして、このような構造の網目状部材の清掃は、固着された状態の網目状部材に圧力水をかけたり、ブラシをかけたりして、網目から粉塵等を除去することで行われる。   In such an air cooling structure, dust or dust may be mixed in the air from the outside, and these accumulate in the gaps of the heat exchanger. A net-like member such as a net or a screen is arranged on the upstream side. Various arrangements for attaching the mesh member to the outside air inlet of the exterior cover have been proposed for reasons such as ease of cleaning (Patent Documents 1 and 2). Then, the mesh member having such a structure is cleaned by removing dust or the like from the mesh by applying pressure water or applying a brush to the fixed mesh member.

ところで、作業機械が稼働する現場には、大量の粉塵が舞うような家屋解体現場やごみ処理現場、あるいは細かい糸状チップが舞う製紙作業現場等があり、そのような現場での作業機械にあっては、前記構造における網目状部材の目詰まりも頻繁に生じる。このため、このような作業現場におけるオペレータは、運転席から降りて網目状部材の清掃作業を行うことが頻繁に要求され、その作業が煩雑となっていた。   By the way, at the site where the work machine operates, there are a house dismantling site where a large amount of dust flies, a garbage disposal site, a papermaking work site where fine thread chips flutter, etc. In the above structure, clogging of the mesh member frequently occurs. For this reason, an operator at such a work site is frequently required to get out of the driver's seat and clean the mesh member, which is complicated.

そこで、そのような問題を解消すべく、網目状部材の清掃作業を運転席から操作できる構造が特開2004−225624号(特許文献3)において提案されている。その提案構造を図4及び図5において示す。図4に示す構造(以下、従来例1という)は、網目状部材70の上端をヒンジ71で支持して揺動自在にし、押し引き力を付与する油圧シリンダ等の駆動機構72により網目状部材70を揺動させたうえ、網目状部材70下端の手前にストッパ73を設けて、そこに揺動させた下端を衝突させ、その衝撃により、網目状部材70に溜まった塵埃等を落下させるというものである。一方、図5に示す構造(以下、従来例2という)は、網目状部材70の上端を上下移動自在に支持するともに、下端の下にストッパ74を設け、上下駆動機構75により、網目状部材70をいったん持ち上げた後、自重落下させてその下端をストッパ74に衝突させ、その衝撃により、網目状部材70に溜まった塵埃等を落下させるというものである。   Therefore, in order to solve such a problem, Japanese Patent Application Laid-Open No. 2004-225624 (Patent Document 3) proposes a structure in which the mesh member cleaning operation can be operated from the driver's seat. The proposed structure is shown in FIGS. In the structure shown in FIG. 4 (hereinafter referred to as Conventional Example 1), the mesh member is supported by a drive mechanism 72 such as a hydraulic cylinder which supports the upper end of the mesh member 70 by a hinge 71 so as to be swingable and applies a pushing / pulling force. In addition to swinging 70, a stopper 73 is provided in front of the lower end of the mesh member 70, and the lower end of the swing is made to collide therewith, and the impact causes the dust or the like accumulated in the mesh member 70 to drop. Is. On the other hand, the structure shown in FIG. 5 (hereinafter referred to as Conventional Example 2) supports the upper end of the mesh member 70 so as to be movable up and down, and is provided with a stopper 74 below the lower end. After the 70 is lifted up, it is dropped by its own weight, the lower end of the 70 is made to collide with the stopper 74, and the dust or the like accumulated on the mesh member 70 is dropped by the impact.

特開2005−325590号(図2)Japanese Patent Laying-Open No. 2005-325590 (FIG. 2) 特開2005−307521号(図1、図6、図7)JP-A-2005-307521 (FIGS. 1, 6, and 7) 特開2004−225624号(図1〜7)JP-A-2004-225624 (FIGS. 1-7)

前記従来例1及び従来例2は、スイッチ機構を利用すれば、オペレータが運転席から操作でき、一々運転席から降りて清掃作業を要していた従来と比較して、格段にオペレータの労力が緩和されたものの、次のような問題があった。   In the conventional example 1 and the conventional example 2, if the switch mechanism is used, the operator can operate from the driver's seat, and the operator's labor is remarkably reduced as compared with the conventional case in which the operator has to go down from the driver's seat and require cleaning work. Although mitigated, there were the following problems.

まず従来例1は、網目状部材70を前方のストッパ73に衝突させる際、押し引き力を付与する駆動機構72に、衝突の衝撃が直接伝達されることになる。これが、駆動機構72の破損を早めることになり、その耐久性に問題があった。また、清掃を行わない通常状態では、網目状部材70を閉じた状態とするが、このとき網目状部材70は隙間なく外装カバーの枠に密着させる必要があり、その場合、駆動機構72は引き動作を維持する必要があった。また、作業機械本体の駆動によって、その振動が動作中の駆動機構72に伝達されることになり、それが駆動機構72の耐久性をさらに低下させるものとなっていた。また、駆動機構72として、図示のような油圧シリンダが用いられた場合、それを作業機械本体内に配置する以外になく、スペース上の制約がある作業機械には適用できないという問題があることに加え、既存の機体に後付で配置することも困難だった。   First, in the first conventional example, when the mesh member 70 is caused to collide with the front stopper 73, the impact of the collision is directly transmitted to the drive mechanism 72 that applies the pushing / pulling force. This hastened the breakage of the drive mechanism 72 and had a problem with its durability. In a normal state in which cleaning is not performed, the mesh member 70 is closed. At this time, the mesh member 70 needs to be in close contact with the frame of the exterior cover without any gap. In this case, the drive mechanism 72 is pulled. It was necessary to maintain operation. Further, the vibration of the work machine main body is transmitted to the drive mechanism 72 in operation, which further reduces the durability of the drive mechanism 72. In addition, when a hydraulic cylinder as shown in the figure is used as the drive mechanism 72, there is a problem that it cannot be applied to a work machine with space constraints other than arranging it in the work machine body. In addition, it was difficult to retrofit existing aircraft.

一方、従来例2は、網目状部材70が自重落下したときは、網目状部材70と上下駆動機構75とが接触していないので、衝突の衝撃が伝達される問題は少ないものの、網目状部材70の下端を自由端とする必要があるので、下端に隙間が生じてしまい、完全な防塵が行い得ない形態だった。しかも、網目状部材70と衝突するストッパ74は網目状部材70の下端を受ける形態となるので、ストッパ74に落下した塵埃が堆積するという問題もあった。   On the other hand, in the conventional example 2, when the mesh member 70 falls by its own weight, the mesh member 70 and the vertical drive mechanism 75 are not in contact with each other. Since it was necessary to make the lower end of 70 a free end, there was a gap at the lower end, and it was a form that could not be completely dustproof. Moreover, since the stopper 74 that collides with the mesh member 70 is configured to receive the lower end of the mesh member 70, there is also a problem that dust that has fallen on the stopper 74 accumulates.

この発明は、従来技術の以上のような問題に鑑み創案されたもので、耐久性及び防塵効果に何の問題もなく、しかもコンパクトに設置できる外気吸入口用防塵装置を提供しようとするものである。   The present invention was devised in view of the above problems of the prior art, and is intended to provide a dustproof device for an outside air inlet that can be installed compactly without any problems in durability and dustproof effect. is there.

このため、この発明に係る作業機械の外気吸入口用防塵装置は、外装カバーに形成された外気吸入口を覆う網目状部材と、該網目状部材を、その端部のうち少なくとも一端部が外方に飛び出し自在となるように支持させる支持機構と、その飛び出し自在な端部を外方に飛び出させる押圧力のみ付与する駆動機構と、飛び出し自在な端部に、飛び出し方向とは逆の方向の引張力を付与する弾性体とを備えたことを特徴とする。   Therefore, a dustproof device for an outside air inlet of a work machine according to the present invention includes a mesh member that covers an outside air inlet formed in an exterior cover, and at least one end of the mesh member that is outside of the mesh member. A support mechanism that supports the projection so as to be able to pop out, a drive mechanism that applies only a pressing force that causes the pop-out end to jump out, and a pop-up end that is in a direction opposite to the pop-out direction. And an elastic body for applying a tensile force.

ここで、前記網目状部材とは、塵や埃をその網目状部分で捉えるような多孔状の部材(例えばナイロンスクリーンやパンチ穴の開いたパンチングメタル等)をいう。網目状を形成する孔の形状、模様、大きさ等はその用途に応じて変更すればよく、素材も問わない。また、例えば、網目状部分が柔軟な素材によるような場合、周縁を枠体によって固定されるような形態のものも当然含む。   Here, the mesh member refers to a porous member (for example, a nylon screen or a punching metal having a punched hole) that catches dust or dirt with the mesh portion. The shape, pattern, size, etc. of the holes forming the mesh shape may be changed according to the application, and the material is not limited. In addition, for example, when the mesh portion is made of a flexible material, it naturally includes a configuration in which the periphery is fixed by a frame.

また、前記網目状部材の端部とは、網目状部材の縦横いずれかの端部をいう。後述する第1実施形態例のように、上端がヒンジで支持され、下端が自由端となるような形態では、下端が外方に飛び出し自在な端部となる。第2実施形態例のように、下端の他に上端も外方に飛び出し自在な端部となっても良い。   Moreover, the edge part of the said mesh member means the edge part in any one of the vertical and horizontal of a mesh member. In a form in which the upper end is supported by a hinge and the lower end is a free end as in the first embodiment described later, the lower end is an end that can be protruded outward. As in the second embodiment, in addition to the lower end, the upper end may be an end that can be protruded outward.

次に本発明の作用を説明する。通常の場合、網目状部材は、その端部のうち少なくとも一端部が外方に飛び出し自在となるように支持されているが、その飛び出し自在な端部には、弾性体により、飛び出し方向とは逆方向の引張力が付与されているので、網目状部材は外装カバー側にしっかり当接されることになり、余計な隙間等が生じることなく、外気吸入口を覆うことになる(閉状態)。一方、外気吸入口を覆う網目状部材の面上に塵や埃等が溜まったとすると、駆動機構を駆動させ、網目状部材のうち外方に飛び出し自在な端部を押圧してその部分を飛び出させる(開状態)。駆動機構は押圧力を付与するだけなので、所定位置で押圧を停止すると(例えば後述する第1形態例では板カムの突出部の離れる動作による)、網目状部材の飛び出した端部は、それまでの押圧力が解放されて、今度は弾性体の引張力が作用して元に戻るように動作する。弾性体の引張力に付勢された端部は勢いをつけて外気吸入口縁部に当接し、そのときの衝撃で網目状部材網目に溜まった塵や埃等は落下する。衝突後は小さい跳ね返りがあるとしても、弾性体の引張力で網目状部材は元の状態に戻る(閉状態)。当接時の衝撃は弾性体に伝達されるが、前記駆動機構は押圧力を付与した後は、網目状部材と接触させる必要がなく、つまり非接触とすることができるので、そのような構成とすれば、駆動機構には当接時の衝撃がまったく伝達されないことになる。   Next, the operation of the present invention will be described. In a normal case, the mesh member is supported so that at least one end portion of the mesh member can be protruded outwardly. Since a reverse tensile force is applied, the mesh member will be firmly in contact with the exterior cover side and will cover the outside air inlet without any extra gaps (closed state). . On the other hand, if dust or dirt accumulates on the surface of the mesh member that covers the outside air inlet, the drive mechanism is driven to press the end of the mesh member that can jump outwards, and the part pops out. (Open state) Since the driving mechanism only applies a pressing force, when the pressing is stopped at a predetermined position (for example, by the movement of the protruding portion of the plate cam in the first embodiment described later), the protruding end of the mesh member is The pressing force is released, and this time, the tensile force of the elastic body acts to return to the original state. The end portion urged by the tensile force of the elastic body exerts momentum and comes into contact with the edge of the outside air inlet, and dust, dust, etc. collected in the mesh member network drop by the impact at that time. Even if there is a small rebound after the collision, the mesh member returns to its original state (closed state) by the tensile force of the elastic body. Although the impact at the time of contact is transmitted to the elastic body, the drive mechanism does not need to be in contact with the mesh member after applying the pressing force, that is, it can be made non-contact. If so, the impact at the time of contact is not transmitted to the drive mechanism at all.

以上説明したように、本発明に係る作業機械の外気吸入口用防塵装置によれば、網目状部材に溜まった塵埃等を落下させる際、駆動機構に直接衝撃が伝達されない構成とすることが可能なので、そのような構成とすれば、駆動機構の耐久性が顕著に向上することになる。   As described above, according to the dustproof device for an outside air suction port of a work machine according to the present invention, it is possible to adopt a configuration in which an impact is not directly transmitted to the drive mechanism when dust or the like accumulated on the mesh member is dropped. Therefore, with such a configuration, the durability of the drive mechanism is significantly improved.

また、駆動機構は、網目状部材の開動作に関わる押圧力を付与するだけであり、通常の状態でも、網目状部材は弾性体の引張力により外装カバーとの当接状態が維持されるので、駆動機構の駆動コストは低くて済む。   Further, the drive mechanism only applies a pressing force related to the opening operation of the mesh member, and the mesh member is maintained in contact with the exterior cover by the tensile force of the elastic body even in a normal state. The drive cost of the drive mechanism can be low.

さらに、駆動機構は押圧するだけの機構で良いので、後述する実施形態例のように、板カム等を用いれば、きわめて簡易な構造とすることも可能であり、それゆえ、外装カバー内にスペースの制約がある機種にも適用でき、しかも後付で設置することも容易となる。   Further, since the drive mechanism may be a mechanism that only presses, a plate cam or the like can be used as in the embodiment described later, so that an extremely simple structure can be obtained. It can also be applied to models with restrictions, and can be easily installed later.

そして、通常の状態(閉状態)においては、上記のように、弾性体の引張力によって網目状部材は、外気吸入口を覆いながらしっかり外装カバーに当接されるので、余計な隙間等の生じることがなく、塵や埃等が外装カバー内に侵入することを完全に防ぐものとなっている。   In the normal state (closed state), as described above, the mesh member is firmly abutted against the exterior cover while covering the outside air suction port by the tensile force of the elastic body, so that an extra gap or the like is generated. In this way, dust and dust are completely prevented from entering the exterior cover.

加えて、従来例のようにストッパ等も不要であり、従来例2のような下側ストッパも不要なので、余計なところに塵等が堆積することもまったくないものとなっている。   In addition, a stopper or the like is not required as in the conventional example, and a lower stopper as in Conventional Example 2 is also unnecessary, so that dust or the like is not deposited at an unnecessary place.

本発明の第1実施形態例を示し、(a)は網状部材が閉じた状態の防塵装置の説明図、(b)は開いた状態の便宜的説明図(押圧による開状態よりさらに開いた状態)、(c)は側面図である。1 shows an example of a first embodiment of the present invention, (a) is an explanatory view of a dustproof device in a state in which a mesh member is closed, (b) is a convenient explanatory view in an open state (a state further opened than an open state by pressing) ), (C) are side views. 本発明の第2実施形態例を示し、(a)は網目状部材が閉じた状態の防塵装置の説明図、(b)は網目状部材が開いた状態の防塵装置の説明図である。FIGS. 2A and 2B show a second embodiment of the present invention, in which FIG. 2A is an explanatory diagram of a dustproof device with a mesh member closed, and FIG. 2B is an explanatory diagram of a dustproof device with a mesh member open. 本発明の第3実施形態例を示し、(a)は網目状部材が閉じた状態の防塵装置の説明図、(b)は網目状部材が開いた状態の防塵装置の説明図である。FIGS. 3A and 3B show a third embodiment of the present invention, in which FIG. 4A is an explanatory diagram of a dustproof device with a mesh member closed, and FIG. 4B is an explanatory diagram of a dustproof device with a mesh member open. 特開2004−225624号に開示された従来構造(従来例1)を示し、(a)は機械全体を含めた側面断面図、(b)は外気吸入口付近の側面断面図、(c)はその斜視図である。1 shows a conventional structure (conventional example 1) disclosed in Japanese Patent Application Laid-Open No. 2004-225624, (a) is a side sectional view including the entire machine, (b) is a side sectional view in the vicinity of an outside air inlet, and (c) is a sectional view. FIG. 特開2004−225624号に開示された他の従来構造(従来例2)を示し、(a)は外気吸入口付近の側面断面図、(b)はその斜視図である。The other conventional structure (conventional example 2) disclosed by Unexamined-Japanese-Patent No. 2004-225624 is shown, (a) is side surface sectional drawing of the external air inlet vicinity, (b) is the perspective view.

本発明に係る具体的形態の一例を図面に基づき説明する。いずれの形態例も、細かい塵埃等が多量に舞うような作業現場で使用されるブルドーザのサイドの外装カバーに適用される例を示す。なお、以下に示す形態例はあくまで本発明の一例であって、適用される作業機械はもちろんのこと、防塵装置の具体的形態についても、それらに本発明が限定されないことは当然である。   An example of a specific form according to the present invention will be described with reference to the drawings. Each of the embodiments shows an example applied to an exterior cover on the side of a bulldozer used at a work site where a large amount of fine dust or the like flies. It should be noted that the embodiments shown below are merely examples of the present invention, and it goes without saying that the present invention is not limited to specific forms of the dustproof device as well as the applied work machine.

図1は第1実施形態例を示し、(a)は網状部材が閉じた状態の防塵装置の説明図、(b)は開いた状態の便宜的説明図(押圧による開状態よりさらに開いた状態)、(c)は側面図である。図中、1は外気吸入口、2は網目状部材であるパンチングメタルドア(図示上、パンチ孔は省略)、3は支持機構であるヒンジ、4は押圧力のみ付与する駆動機構、5は弾性体であるスプリングを各示す。   FIG. 1 shows a first embodiment, (a) is an explanatory view of a dustproof device in a state in which a mesh member is closed, (b) is a convenient explanatory view in an open state (a state further opened than an open state by pressing) ), (C) are side views. In the figure, 1 is an outside air inlet, 2 is a punching metal door which is a mesh-like member (the punch hole is omitted in the figure), 3 is a hinge which is a support mechanism, 4 is a drive mechanism which applies only pressing force, and 5 is elastic Each spring is shown.

外気吸入口1は、エンジンルーム側方の外装カバーに形成される。図示のように、外気吸入口1の周縁には、外方に張り出す枠体10が固着され、周縁からの塵埃等の侵入を遮断している。   The outside air inlet 1 is formed in an exterior cover on the side of the engine room. As shown in the figure, a frame body 10 that projects outward is fixed to the periphery of the outside air inlet 1 to block entry of dust and the like from the periphery.

パンチングメタルドア2は、枠体10を介して外気吸入口1を覆いながら、その上端が前記枠体10の上片にヒンジ3により留められ、これにより、下端が自由端となって開閉自在に支持される。この下端が、後述する板カム42の押圧力によって外方に飛び出させられる端部となる。   The punching metal door 2 covers the outside air inlet 1 through the frame body 10, and its upper end is fastened to the upper piece of the frame body 10 by the hinge 3, so that the lower end can be freely opened and closed. Supported. This lower end becomes an end portion that is projected outward by the pressing force of the plate cam 42 described later.

駆動機構4は、特に図1(b)に示すように、モータ40と、ギア機構41と、板カム42とから構成され、それらがすべて枠体10の下片に載置される。すなわち、駆動機構4は外装カバーの外側に配置されている。駆動機構4は、モータ40の回転により、ギア機構41を介して突出部のある板カム42が水平方向で回転し、その回転時、板カム42の突出部は枠体10の外方に大きく突出する。この突出により、前記パンチングメタルドア2に押圧力を付与し、パンチングメタルドア2は下端側が外方に飛び出しながら開くことになる(開状態)。なお、板カム42がさらに回転し、突出部がパンチングメタルドア2から離れると、後述するスプリング5の引張力でパンチングメタルドア2は元の位置に戻される(閉状態)。すなわち、駆動機構4は、パンチングメタルドア2に押圧力のみ付与する手段となっている。また、前記モータ40の動作は、図示しない制御機構を介して、タイマ等による自動操作(例えば30分ごとに動作)と、手動のスイッチ機構によるオンオフ操作のいずれも選択が可能となっており、それら操作スイッチは運転席に配置され、オペレータが自在に操作可能となっている。   As shown in FIG. 1B in particular, the drive mechanism 4 includes a motor 40, a gear mechanism 41, and a plate cam 42, all of which are mounted on the lower piece of the frame 10. That is, the drive mechanism 4 is disposed outside the exterior cover. In the drive mechanism 4, the plate cam 42 with the protruding portion rotates in the horizontal direction via the gear mechanism 41 due to the rotation of the motor 40, and the protruding portion of the plate cam 42 greatly increases outward of the frame body 10 during the rotation. Protruding. By this protrusion, a pressing force is applied to the punching metal door 2, and the punching metal door 2 is opened with its lower end side protruding outward (open state). When the plate cam 42 is further rotated and the protruding portion is separated from the punching metal door 2, the punching metal door 2 is returned to the original position by a tensile force of a spring 5 described later (closed state). That is, the drive mechanism 4 is a means for applying only a pressing force to the punching metal door 2. In addition, the operation of the motor 40 can be selected from an automatic operation by a timer or the like (for example, operation every 30 minutes) and an on / off operation by a manual switch mechanism through a control mechanism (not shown). These operation switches are arranged in the driver's seat and can be freely operated by the operator.

スプリング5は、特に図1(c)に示すように、パンチングメタルドア2の下端と枠体10の基台下端とを連結するように配置され、パンチングメタルドア2の下端が外方向に動くと、それに抗する引張力を付与する。すなわち、パンチングメタルドア2に閉じる力を付与している。   As shown in FIG. 1 (c), the spring 5 is arranged so as to connect the lower end of the punching metal door 2 and the lower end of the base of the frame 10, and when the lower end of the punching metal door 2 moves outward. Applying tensile force against it. That is, a closing force is applied to the punching metal door 2.

以上よりなる本形態例において、例えば網目状部材であるパンチングメタルドア2に塵埃等が溜まった場合、駆動機構4のモータ40を動作させると、板カム42が回転して、その突出部がパンチングメタルドア2の下端を押圧し、パンチングメタルドア2はスプリング5の引張力に抗しながら開いていく。板カム42がさらに回転すると、その突出部がパンチングメタルドア2から離れるので、押圧力がなくなり、パンチングメタルドア2の下端はスプリング5の引張力により引っ張られ、付勢されて枠体10に当接する。この当接時の衝撃で、パンチングメタルドア2に溜まった塵埃等は下方に落下する。   In the present embodiment as described above, for example, when dust or the like accumulates in the punching metal door 2 which is a mesh member, when the motor 40 of the drive mechanism 4 is operated, the plate cam 42 rotates and the protruding portion is punched. The lower end of the metal door 2 is pressed, and the punching metal door 2 opens while resisting the tensile force of the spring 5. When the plate cam 42 is further rotated, the protruding portion is separated from the punching metal door 2, so that the pressing force is lost, and the lower end of the punching metal door 2 is pulled by the tensile force of the spring 5, and is urged against the frame body 10. Touch. Due to the impact at the time of contact, dust or the like accumulated on the punching metal door 2 falls downward.

このような動作は、運転席のスイッチを操作すれば良い。すなわち、本形態例の防塵装置は、従来のように、オペレータが一々機体から降りることなく、網目状部材であるパンチングメタルドア2の清掃(塵埃除去)が容易に行え、それゆえ、清掃作業で本来の作業が中断することがないので、作業効率が顕著に向上する。   Such an operation may be performed by operating a switch in the driver's seat. That is, the dustproof device of this embodiment can easily clean the punched metal door 2 (removal of dust), which is a mesh-like member, without the operator getting down from the machine body as in the prior art. Since the original work is not interrupted, the work efficiency is remarkably improved.

また、パンチングメタルドア2が閉まるときの衝撃時に、駆動機構4はパンチングメタルドア2と接触しない配置なので、その衝撃を直接受けない。このため、装置自体の耐久性も良好である。さらに、駆動機構4は外装カバーの外側の枠体10内に配置されており、他の手段も外装カバーの外側に配置されるコンパクトな形態となっている。このため、外装カバーに外気吸入口1が形成される機体であれば、本形態例の装置を後付けで備えさせることができ、設置コストも低廉で済む。   In addition, when the punching metal door 2 is closed, the drive mechanism 4 is arranged so as not to come into contact with the punching metal door 2, so that the impact is not directly received. For this reason, the durability of the device itself is also good. Further, the drive mechanism 4 is disposed in the frame 10 outside the exterior cover, and other means are in a compact form that is disposed outside the exterior cover. For this reason, as long as the airframe is provided with the outside air inlet 1 in the exterior cover, the device of this embodiment can be retrofitted, and the installation cost can be reduced.

もちろん、通常の状態においては、スプリング5の引張力によって、パンチングメタルドア2は、外気吸入口を覆いながらしっかり閉じられるので、余計な隙間等の生じることがなく、塵や埃等が外気吸入口1から侵入することを完全に防ぐものとなっている。   Of course, in a normal state, the punching metal door 2 is firmly closed while covering the outside air suction port by the tensile force of the spring 5, so that no extra gaps are generated, and dust or dust etc. can be removed from the outside air inlet port. The intrusion from 1 is completely prevented.

次に、図2は第2実施形態例の模式図である。この例は、駆動機構4aが前記駆動機構4と異なるほか、パンチングメタルドア2の上面にさらにメッシュスクリーン20を配置し(網目状部材を二重に配置)、そのメッシュスクリーン20上端もヒンジ3aで支持する点が前記第1実施形態例と異なるが、それ以外の構造は第1実施形態例と同じなので、同じ構成については説明を省略する。   Next, FIG. 2 is a schematic diagram of the second embodiment. In this example, the drive mechanism 4a is different from the drive mechanism 4, and a mesh screen 20 is further disposed on the upper surface of the punching metal door 2 (a mesh member is disposed twice), and the upper end of the mesh screen 20 is also hinged 3a. Although the point of supporting is different from the first embodiment, the other structures are the same as those of the first embodiment, and thus the description of the same configuration is omitted.

本形態例の駆動機構4aは、モータ40の回転により前後動作する機構として、カムに代えて二節リンク機構を用いている。モータ40が回転すると、通常時(閉状態時)はパンチングメタルドア2に接触していない先端側リンク43がガイド(図示なし)に沿って外方に突出し、パンチングメタルドア2の下端に接触してそれを押圧する。その押圧によりパンチングメタルドア2が所定位置まで開いたら(開状態)、モータ40を逆回転させれば、リンク43は後退し、パンチングメタルドア2への押圧力は解放され、スプリング5の引張力によりパンチングメタルドア2は元の位置に付勢されて戻ってくる(閉状態)。第1実施形態例と同様に、枠体(図示なし)に当接し、その時の衝撃でパンチングメタルドア2とメッシュスクリーン20に溜まった塵埃等は下方に落下する。このような作用により、本形態例の効果も前記第1実施形態例と基本的に同様なので省略する。なお、本形態例の駆動機構4aもすべて枠体内に配置されている。   The drive mechanism 4a of the present embodiment uses a two-bar linkage mechanism instead of a cam as a mechanism that moves back and forth by the rotation of the motor 40. When the motor 40 rotates, the tip side link 43 that does not contact the punching metal door 2 normally protrudes along a guide (not shown) and contacts the lower end of the punching metal door 2 when the motor 40 rotates (when closed). Press it. When the punching metal door 2 is opened to a predetermined position by the pressing (open state), if the motor 40 is rotated in the reverse direction, the link 43 moves backward, the pressing force to the punching metal door 2 is released, and the tensile force of the spring 5 As a result, the punching metal door 2 is returned to its original position (closed state). Similar to the first embodiment, the dust or the like that contacts the frame (not shown) and accumulates on the punching metal door 2 and the mesh screen 20 due to the impact at that time falls downward. Due to such an operation, the effect of this embodiment is basically the same as that of the first embodiment, and the description thereof will be omitted. Note that all the drive mechanisms 4a of the present embodiment are also arranged in the frame.

次に、図3は第3実施形態例の模式図である。この例は、第2実施形態例と同様に、パンチングメタルドア2の上面にメッシュスクリーン20が配置され、網目状部材を二重に配置しているが、前記2つの形態例と異なり、パンチングメタルドア2は枠体(図示なし)に固定し、メッシュスクリーン20だけを動作させる構造となっている。すなわち、メッシュスクリーン20は、その上下両端をスプリング5,5aで枠体(図示なし)に連結され、全体が外方に飛び出し自在に支持される(本形態例ではスプリング5,5aが支持機構も兼ねる)。また、枠体内に配置される駆動機構4bは、板カム44がリンク棒45で連結されながら上下に配置され、メッシュスクリーン20を上下両方から押圧する機構となっている。このため、メッシュスクリーン20がスプリング5,5aの引張力により付勢されて枠体に当接した際、当接の衝撃がメッシュスクリーン20の上端側にも均等に生じ、塵埃等の落下効果を効率的なものとしている。これら以外は前記両実施形態例と基本的に同じ構成を備え、その効果も同様であるので説明を省略する。   Next, FIG. 3 is a schematic diagram of the third embodiment. In this example, like the second embodiment, the mesh screen 20 is arranged on the upper surface of the punching metal door 2 and the mesh members are arranged twice. Unlike the two embodiments, however, the punching metal The door 2 is fixed to a frame (not shown), and only the mesh screen 20 is operated. That is, the mesh screen 20 is connected to a frame (not shown) at both the upper and lower ends thereof by springs 5 and 5a, and the whole is supported so as to protrude outward (in this embodiment, the springs 5 and 5a also have a support mechanism). (Also double). The drive mechanism 4b disposed in the frame is a mechanism that is disposed vertically while the plate cam 44 is connected by the link bar 45, and presses the mesh screen 20 from both above and below. For this reason, when the mesh screen 20 is urged by the tension force of the springs 5 and 5a and comes into contact with the frame body, the contact impact is evenly generated on the upper end side of the mesh screen 20 and the effect of dropping dust or the like is exerted. It is efficient. Except for these, the configuration is basically the same as in both the above-described embodiments, and the effects thereof are also the same.

なお、本発明が以上の形態に限定されないことは上述したとおりであり、特許請求の範囲の構成を満足させる形態であれば、上記形態を適宜変更しても当然にその技術的範囲に属するものである。   It is to be noted that the present invention is not limited to the above-described form as described above, and any form that satisfies the configuration of the scope of the claims naturally belongs to the technical scope even if the form is appropriately changed. It is.

この発明は、外装カバーに外気吸入口が形成される種々の作業機械に適用可能である。   The present invention is applicable to various work machines in which an external air inlet is formed in the exterior cover.

1 外気吸入口
2 パンチングメタルドア(網目状部材)
3,3a ヒンジ(支持機構)
4,4a,4b 駆動機構
5,5a スプリング(弾性体。ただし、第3実施形態例では支持機構も兼ねる)
20 メッシュスクリーン(網目状部材)
1 Outside air inlet
2 Punching metal door (mesh-like member)
3,3a Hinge (support mechanism)
4,4a, 4b Drive mechanism
5,5a Spring (elastic body. However, the third embodiment also serves as a support mechanism)
20 mesh screen (mesh-like member)

Claims (1)

外装カバーに形成された外気吸入口を覆う網目状部材と、該網目状部材を、その端部のうち少なくとも一端部が外方に飛び出し自在となるように支持させる支持機構と、その飛び出し自在な端部を外方に飛び出させる押圧力のみ付与する駆動機構と、飛び出し自在な端部に、飛び出し方向とは逆の方向の引張力を付与する弾性体とを備えたことを特徴とする作業機械の外気吸入口用防塵装置。   A mesh member that covers the outside air inlet formed in the exterior cover, a support mechanism that supports the mesh member so that at least one end of the mesh member can project outward, and the projecting mechanism A working machine comprising: a drive mechanism that applies only a pressing force that causes the end portion to jump outward; and an elastic body that applies a tensile force in a direction opposite to the popping direction to the free end portion. Dustproof device for outdoor air intake.
JP2009037841A 2009-02-20 2009-02-20 Dustproofing device for inlet of outside air for working machine Withdrawn JP2010189992A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013083106A (en) * 2011-10-11 2013-05-09 Sumitomo (Shi) Construction Machinery Co Ltd Filter device for construction machine
JP2013083059A (en) * 2011-10-07 2013-05-09 Sumitomo (Shi) Construction Machinery Co Ltd Filter device for construction machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013083059A (en) * 2011-10-07 2013-05-09 Sumitomo (Shi) Construction Machinery Co Ltd Filter device for construction machine
JP2013083106A (en) * 2011-10-11 2013-05-09 Sumitomo (Shi) Construction Machinery Co Ltd Filter device for construction machine

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