JP3967985B2

JP3967985B2 - Cabin structure

Info

Publication number: JP3967985B2
Application number: JP2002266276A
Authority: JP
Inventors: 伸也川尻
Original assignee: Yanma Agricultural Equipment Co Ltd
Current assignee: Yanma Agricultural Equipment Co Ltd
Priority date: 2002-09-12
Filing date: 2002-09-12
Publication date: 2007-08-29
Anticipated expiration: 2022-09-12
Also published as: JP2004098955A

Description

【０００１】
【発明の属する技術分野】
本発明は、空気調和機を備えた走行機体のキャビンの構成の技術に関する。
【０００２】
【従来の技術】
従来、トラクタ等の作業車両において、運転部をキャビンで覆い、該キャビン内の冷暖房や換気を行う空気調和機を該作業車両に配設する構成が広く用いられている。そして、このような構成において、キャビンの内部及び外部から吸気を行う導入口をそれぞれ設け、該空気調和機に空気を導入するダクトと該導入口との接続部に、該導入口を塞ぐ開閉式のシャッタ等による内外気切換手段を設け、内気または外気を選択的に導入できるように構成する技術が知られている（特許文献１・２参照）。
【０００３】
【特許文献１】
特開平９−９５１２１号公報
【特許文献２】
特開２００１−２５３２２４号公報
【０００４】
【発明が解決しようとする課題】
しかし、上記のような構成においては、内外気切換手段に多くの部品や組立工程を要するので、キャビンの製造コスト増大の原因となっていた。また、外気導入口を設ける構成においては、該導入口に設けるダクトのために部品点数や組立工程が増加していた。さらに、洗車等の際に該導入口から水が流入した場合、天井内に配設された他の部材が水で濡れてしまったり、キャビン内部へ水が入り込む可能性があった。
【０００５】
【課題を解決するための手段】
本発明の解決しようとする課題は以上の如くであり、次にこの課題を解決するための手段を説明する。
【０００６】
請求項１においては、走行機体の運転部を覆うキャビン（９）の、天井の前側に空気調和機（２１）を配設し、後側に該空気調和機（２１）への外気導入口（４０）を配設し、該空気調和機（２１）と外気導入口（４０）を、吸気部である外気導入ダクト（４１）と空気導入ダクト（２２）で連通し、該吸気部に内外気切換手段を備え、内気循環と外気導入を切換可能とするキャビンの構造であって、前記内外気切手段を、板状部材により側面視Ｌ字状とした内外気切換板（６０）にて構成し、外気導入口（４０）と反対側の一端を回動可能に支持し、該内外気切換板（６０）にレバー（６２）を固設し、該レバー（６２）の端部をキャビン（９）内部へと突出させて操作可能とし、該内外気切換板（６０）は平板状の部材を、側面視で略直角に折り曲げ略Ｌ字状に形成し、折り曲げ部より後方の垂直面部を外気遮断部（６０ａ）とし、前方の平面部を内気遮断部（６０ｂ）とし、該内外気切換板（６０）は折り曲げ部を上方に配置して外気遮断部（６０ａ）を下方に突出するように構成し、前記外気導入ダクト（４１）と空気導入ダクト（２２）との間の位置に、遮蔽板（４４）を設け、該遮蔽板（４４）の前面には開口部（４４ａ）を設け、該空気導入ダクト（２２）と連通し、該キャビン（９）のインナールーフ（２３）の空気導入ダクト（２２）後端部付近に、上下方向の開口部（２３ｃ）を設け、該空気導入ダクト（２２）とキャビン（９）内部とを連通して内気導入口（５０）とし、前記内外気切換板（６０）を下方に回動し、前記遮蔽板（４４）の開口部（４４ａ）を開口し、該内外気切換板（６０）の内気遮断部（６０ｂ）をインナールーフ（２３）に開口した内気導入口（５０）を被覆接触させて、該キャビン（９）内部と空気導入ダクト（２２）との間の空気の流れを遮断し、前記内外気切換板（６０）を上方に回動し、前記内気導入口（５０）を開口し、該内外気切換板（６０）の外気遮断部（６０ａ）を、遮蔽板（４４）の開口部（４４ａ）を覆うように接触させ、前記外気導入ダクト（４１）から空気導入ダクト（２２）への空気の流入を遮断すべく構成したものである。
【０００７】
請求項２においては、請求項１記載のキャビンの構造において、前記内外気切換板（６０）を操作するためのレバー（６２）を弾性部材で構成し、該レバー（６２）を、キャビン（９）の内部に配置し長孔の両端に係止部を備えたレバーガイド（６６）に挿入したものである。
【０００８】
請求項３においては、請求項１記載のキャビンの構造において、前記吸気部の外気導入口（４０）と、該空気調和機（２１）に連通する天井内部の空気導入ダクト（２２）との間に段差を設け、該外気導入ダクト（４１）が該空気導入ダクト（２２）より上下方向下方に位置するように構成したものである。
【０００９】
【発明の実施の形態】
次に、発明の実施の形態を説明する。図１は本発明によるキャビンを備えたトラクタの側面図、図２はルーフの構成を示す平面図、図３は同じく側面断面図、図４は内外気切換手段の構成を示す側面断面図、図５は外気導入口の構成を示す斜視図、図６は外気遮断時における内外気切換手段の構成を示す側面断面図、図７は内気遮断時における内外気切換手段の構成を示す側面断面図、図８は内外気切換板に取り付けるレバーの構成を示す平面図部分断面図、図９はレバーガイドの平面図である。
【００１０】
まず、本発明によるキャビン９を備えたトラクタ１の全体構成について、図１を用いて説明する。エンジンフレーム２にフロントアクスルケースを介して前輪３・３が支承され、該エンジンフレーム２の後部にクラッチハウジングを介してミッションケース４が配置され、該ミッションケース４の両側にリアアクスルケースを介して後輪５・５が支承されている。該ミッションケース４の後部にトップリンク、ロワーリンク等からなる作業機装着装置を介して作業機を装着できるようにしている。また、該ミッションケース４の前下部に前輪駆動出力軸が前方に突出されて、ユニバーサルジョイント、伝動軸等を介して前輪３・３を駆動できるようにしている。
【００１１】
前記エンジンフレーム２にはエンジン５が載置され、該エンジン５はボンネット６によって覆われている。該ボンネット６の後部には操向ハンドル７や座席８が配置され、運転部を構成し、該運転部はキャビン９によって覆われる構成としている。該キャビン９はキャビンフレーム１０・１０・１１・１１をエンジンフレーム、ミッションケース４よりそれぞれ立設して、上面はルーフ２０により覆い天井部を構成し、前面はフロントガラス、側面はドア１２・１２、後面はリアガラスによって覆っている。
【００１２】
次に、キャビン９のルーフ２０への空気調和機２１の配設の構成、及び該空気調和機２１に用いる空気導入ダクト２２の構造を、図２及び図３を用いて説明する。ルーフ２０の前後一側（本実施例では前部）に空気調和機２１が配置され、前後他側（後部）に吸気部が配置されている。該ルーフ２０はインナールーフ２３とアウタールーフ２４とにより構成されており、インナールーフ２３とアウタールーフ２４との間に空気調和機２１が配置され、該インナールーフ２３の前部には空気調和機２１を収納するための凹部２３ａが形成されている。なお、インナールーフ２３とアウタールーフ２４は合成樹脂により構成することができるが、アウタールーフ２４をブロー成形または回転成形等の樹脂ではなく、板金で構成することによって、ルーフ２０全体をより薄く形成することができる。
【００１３】
ルーフ２０の左右中央後部には外気導入口４０と内気導入口５０が設けられ、ダクトを介して空気調和機２１の吸入側と連通されている。空気調和機２１はファン２５と熱交換器２６からなり、図示しないコンプレッサがエンジン５近傍に配置されている。なお、本実施例では該空気調和機２１としてエアコンの室内ユニットを配設しているが、空気調和機として換気扇等を配設する構成としてもよい。また、インナールーフ２３とアウタールーフ２４との間には、帯状のシール材２７が配設される。該シール材２７は空気調和機２１前端部から左右両側方へ延出して、空気調和機２１の両側から空気導入部の両側に向けて後方へ延出して、平面視略Ｕ字状に形成され、インナールーフ２３及び空気調和機２１と、アウタールーフ２４との間に介装されている。該シール材２７、インナールーフ２３及びアウタールーフ２４によって形成される空気導入ダクト２２が左右中央に前後方向に配置され、その両側及び左右中央前部に吹き出しダクトが形成され、該吹き出しダクトは吹き出し口２８・２８・・・によりキャビン９内部と連通されている。そして、空気導入ダクト２２から空気調和機２１へ導入された空気は該吹き出しダクトを経て、該吹き出し口２８・２８・・・よりキャビン９内の運転部へと吐出される。なお、該吹き出し口の形状、個数及び位置は特に限定しない。また、図４に示す如く、アウタールーフ２４の下面に板状に形成した断熱材２９を固設することで、該空気導入ダクト２２内やキャビン内の空気の温度が、外部の気温の影響による変化を軽減することができる。なお、上記の構成において、アウタールーフ２４に凹状の溝部を設け、該溝部の下面にシール材２７が接するように配置することで、アウタールーフ２４の剛性を高めるとともにシール材２７の圧縮性を強め、空気導入ダクト２２の密閉性をより向上させることも可能である。
【００１４】
そして、前記収納凹部２３ａにおいて空気が漏れないように支持プレート３０を空気調和機２１上面と収納凹部２３ａの後部上面２３ｂに載置し固定している。図２に示す如く、前記キャビンフレーム１０・１０及び前記キャビンフレーム１１・１１の上部間にそれぞれ梁３１・３２が左右にわたって架設され、該キャビンフレーム１０・１１の上部間に前後にわたって梁３３・３３が架設される。該梁３３・３３の左右中途部上で支持プレート３０が該梁３３・３３間に横設され、該支持プレート３０前部は空気調和機２１の後部上面に、該支持プレート３０後部はインナールーフ２３の後部上面２３ｂにそれぞれ固定されている。
【００１５】
次に、ルーフ２０の外気導入口４０及び外気導入ダクト４１の構成について説明する。図３に示す如く、前記キャビン９の天井を構成するアウタールーフ２４の後端部は後部のキャビンフレーム１１・１１よりも後方へ突出している。該アウタールーフ２４の突出部２４ａの下面を覆うように、下部プレート４２が接着等によって固定されている。該下部プレート４２の中央部には外気を導入するための開口部が設けられ、該開口部を覆うように外気導入フィルタ４３が取り付けられ、外気導入口４０を構成している。
【００１６】
図５に示す如く、該下部プレート４２には平面視「コ」字状にプレートを折り曲げて構成した遮蔽板４４が、該外気導入フィルタ４３の両側方及び前方を覆うように固設されている。また、該遮蔽板４４はその前面で前記空気導入ダクト２２と接し、該遮蔽板４４の前面には開口部４４ａが設けられ、該空気導入ダクト２２と連通されている。そして該遮蔽板４４及びアウタールーフ２４によって外気導入ダクト４１が構成されている。外気導入ダクトを別体としてアウタールーフに固定する構成や、アウタールーフに一体的にダクト部を形成する構成においては、該アウタールーフが大きいために組立作業に多くの時間を要し、生産性を悪化させていた。そこで、外気導入ダクト４１をこのように構成することによって、該ダクト部の組立作業をより容易とすることが可能であるとともに、別体のダクトを取り付ける構成に対しては部品点数も削減できる。また、この構成においては、アウタールーフ２４をルーフ２０から分解することで外気導入ダクト４１内部の洗浄が可能となる。そして、車体外部には溶接等による固定部が露出しないので、美観においても有利となる。該遮蔽板４４の代わりに、下部プレート４２上面に絞り加工等により平面視「コ」字状の突出部を一体的に設け、該突出部とアウタールーフ２４によって外気導入ダクト４１を構成することも可能である。このように構成した場合は、部品点数のさらなる削減が可能となるとともに、該下部プレート４２への前記遮蔽板４４の固定作業が不要となるという利点が得られる。また、該遮蔽板４４及び該突出部のうちいずれを用いる構成においても、下部プレート４２に外気導入口４０を構成する開口部を設けているため、該下部プレート４２のみを変更すればインナールーフ２３に同一の部材を用いても外気導入口４０を塞いだ構成とすることが可能であり、外気導入機能を省略したトラクタを製造する際にも部品を共有できる。さらに、遮蔽板４４の下部プレート４２への固定を、ボルトでの締結等により着脱可能に構成することで、内外気切換機能をオプション化し、トラクタ１の製造後に内外気切換機能を追加、あるいは削除することも可能となる。
【００１７】
また、図４に示す如く、外気導入口４０よりも前記遮蔽板４４の開口部４４ａが上下方向上方に位置するように、前記下部プレート４２上面と梁３２の上面との間に段差部３２ａを設けている。このように構成することで、トラクタ１の車体の洗浄等によって外気導入口４０より水が入り込んだ際に水が該段差３２ａによって止められるので、水が車体内部へと浸入することを防止できる。
【００１８】
次に、内気導入口５０の構成について説明する。図４に示す如く、インナールーフ２３の空気導入ダクト２２後端部付近には上下方向の開口部２３ｃが設けられ、空気導入ダクト２２とキャビン９内部とを連通している。そして、該開口部２３ｃを覆うように下方より内気導入フィルタ５１が固定され、内気導入口５０を構成している。内気導入フィルタ５１はノブ付のネジ５２・５２・・・等により、キャビン９内部側からインナールーフ２３を介して、後述する内外気切換手段の回動支点６１の基部プレート６３に締結固定している。このように構成することで、該内気導入口５０に配設するフィルタ５１及び該フィルタ５１の固定に用いる部材を、仕様の異なるキャビンのルーフにおいて共用できるので、部材に要するコストの削減が可能となる。また、キャビン９内部からの該フィルタ５１の着脱が可能なように構成することで、該フィルタ５１の交換作業がより容易となる。
【００１９】
そして、図４に示すように、天井後部には内外気切換手段が設けられており、該切換手段により内気循環と外気導入を切換可能としている。該切換手段は、内外気切換板６０と、該切換板６０を回動可能に取り付けるヒンジ等からなる回動支点６１、及び該切換板６０を操作するためのレバー６２から構成され、座席８上方に配置されて、操作し易い位置に配置されている。内外気切換板６０は平板状の部材を略直角に折り曲げ、側面視略Ｌ字状に形成し、折り曲げ部より前後方向後方の垂直面部を外気遮断部６０ａ、前後方向前方の平面部を内気遮断部６０ｂとしている。そして、該切換板６０は折り曲げ部が上方に位置して外気遮断部６０ａを下方に突出するように配置している。前記回動支点６１は内外気切換板６０の基部プレート６３の前部上面、及び該切換板６０の前端部付近を回動可能に連結し、該基部プレート６３はインナールーフ２３の上面後部から梁３２の上面にわたって配置、固定されている。そして、該切換板６０をインナールーフ２３に対し上下方向に回動可能としている。また、該基部プレート６３には内気導入口５０の位置から切換板６０の後端部の位置にわたる開口部を設け、該切換板６０の前記折り曲げ部より後部が、該基部プレート６３よりも下方まで回動できるように構成している。これにより、該切換板６０を図７に示す如く、下方に回動させて内気遮断部６０ｂを水平方向に位置させることで内気導入口５０に接触させ、塞ぐことが可能となる。
【００２０】
このように、切換板６０を下方に回動させることで、内気遮断部６０ｂをインナールーフ２３に、前記内気導入口５０を覆うように接触させ、キャビン９内部と空気導入ダクト２２との間の空気の流れを遮断することができる。そして、空気調和機２１を作動させると、外気が外気導入口４０の外気導入フィルタ４３を介して清浄化されて、遮蔽板４４の開口部４４ａを介して空気導入ダクト２２内に入り、空気調和機２１に吸い込まれて温度調節（熱交換）して吹き出し口２８・２８・・・よりキャビン内に吐出される。こうして外気導入ができる。そして、図６に示す如く、切換板６０を上方に回動させることで外気遮断部６０ａを、前記遮蔽板４４の開口部４４ａを覆うように接触させ、外気導入ダクト４１から空気導入ダクト２２への空気の流入を遮断することができる。そして、空気調和機２１を作動させると、外気は吸入されず、キャビン内の空気が内気導入口５０に配設したフィルタ５１、開口部２３ｃを介して切換板６０に囲まれる空間内に入り、両側方から空気導入ダクト２２内に入り、空気調和機２１に吸い込まれて温度調節（熱交換）して吹き出し口２８・２８・・・よりキャビン内に吐出されて循環するようにしている。こうして内気循環ができる。なお、外気遮断部６０ａの遮蔽板４４と接する面、及び内気遮断部６０ｂのインナールーフ２３と接する面にはウレタン等で平板状に構成されたシール部材６４・６５をそれぞれ固設し、より遮断性を高めている。
【００２１】
内外気切換板を操作するためのレバー６２は図８に示す如く、板バネ等の弾性力を有する平板状部材６２ａで構成し、該平板状部材６２ａの平面が鉛直方向の垂線と略平行となるように配置し、該平板部材６２ａの一方の端部においてリベット６５・６５等によって内外気切換板６０の一端に固定している。そして、もう一方の端部には握り部６２ｂを固設し、図４に示す如くインナールーフ２３後部の、梁３２の前方に設けた開口部２３ｄよりキャビン９内部に斜め方向に突出させている。インナールーフ２３の該開口部２３ｄの外側には、図９に示す如く、平板状の部材に長孔６６ａを設けて構成したレバーガイド６６を固設し、該長孔６６ａからレバー６２の端部を突出させている。長孔６６ａの上下両端には該長孔６６ａの長手方向と直角となる方向よりも若干レバーガイド６６内側に向けた切り欠きによる係止部６６ｂ・６６ｂを形成し、該長孔６６ａが正面視略「コ」字状となるようにしている。そして、レバー６２の平板部材６２ａを変形させて（図９左側へ曲げて）長孔６６ａにそって操作し、該長孔６６ａの端部から係止部６２へと該レバー６２を移動、嵌合させることで、該レバー６２を構成する平板状部材６２ａの弾性力によってレバー６２を係止部６６ｂに固定することが可能なように構成している。このように構成することで、該平板状部材６２ａの弾性力によって前記内外気切換板６０を外気導入口４０を塞ぐ位置、または内気導入口５０を塞ぐ位置のいずれかに保持することが可能となるのである。従って、内外気切換板６０をバネ等による付勢によって保持する構成に対し、部品点数の削減が可能となる。また、トラクタ１の走行時等に、該内外気切換板６０が振動し騒音を発することを防止できる。
【００２２】
また、以上のように構成することで、内外気切換板６０や基部プレート６３、内気導入フィルタ５１等の部材を、ルーフ２０の組立工程よりも前にインナールーフ２３に取り付けておくことが可能になる。これによって組立に要する工程数を削減できる。
【００２３】
【発明の効果】
本発明は、以上のように構成したので、以下に示すような効果を奏する。
【００２４】
請求項１に示す如く、走行機体の運転部を覆うキャビン（９）の、天井の前側に空気調和機（２１）を配設し、後側に該空気調和機（２１）への外気導入口（４０）を配設し、該空気調和機（２１）と外気導入口（４０）を、吸気部である外気導入ダクト（４１）と空気導入ダクト（２２）で連通し、該吸気部に内外気切換手段を備え、内気循環と外気導入を切換可能とするキャビンの構造であって、前記内外気切手段を、板状部材により側面視Ｌ字状とした内外気切換板（６０）にて構成し、外気導入口（４０）と反対側の一端を回動可能に支持し、該内外気切換板（６０）にレバー（６２）を固設し、該レバー（６２）の端部をキャビン（９）内部へと突出させて操作可能とし、該内外気切換板（６０）は平板状の部材を、側面視で略直角に折り曲げ略Ｌ字状に形成し、折り曲げ部より後方の垂直面部を外気遮断部（６０ａ）とし、前方の平面部を内気遮断部（６０ｂ）とし、該内外気切換板（６０）は折り曲げ部を上方に配置して外気遮断部（６０ａ）を下方に突出するように構成し、前記外気導入ダクト（４１）と空気導入ダクト（２２）との間の位置に、遮蔽板（４４）を設け、該遮蔽板（４４）の前面には開口部（４４ａ）を設け、該空気導入ダクト（２２）と連通し、該キャビン（９）のインナールーフ（２３）の空気導入ダクト（２２）後端部付近に、上下方向の開口部（２３ｃ）を設け、該空気導入ダクト（２２）とキャビン（９）内部とを連通して内気導入口（５０）とし、前記内外気切換板（６０）を下方に回動し、前記遮蔽板（４４）の開口部（４４ａ）を開口し、該内外気切換板（６０）の内気遮断部（６０ｂ）をインナールーフ（２３）に開口した内気導入口（５０）を被覆接触させて、該キャビン（９）内部と空気導入ダクト（２２）との間の空気の流れを遮断し、前記内外気切換板（６０）を上方に回動し、前記内気導入口（５０）を開口し、該内外気切換板（６０）の外気遮断部（６０ａ）を、遮蔽板（４４）の開口部（４４ａ）を覆うように接触させ、前記外気導入ダクト（４１）から空気導入ダクト（２２）への空気の流入を遮断すべく構成したので、より少ない部品点数及び組立工程で内外気切換手段を構成できるのである。
【００２５】
請求項２に示す如く、前記内外気切換板（６０）を操作するためのレバー（６２）を弾性部材で構成し、該レバー（６２）を、キャビン（９）の内部に配置し長孔の両端に係止部を備えたレバーガイド（６６）に挿入したので、より少ない部品点数で該内外気切換板を内気遮断位置及び外気遮断位置の一方に保持可能に構成できるとともに、該内外気切換板が振動することによる騒音の発生を防止できる。
【００２６】
請求項３に示す如く、前記吸気部の外気導入口（４０）と、該空気調和機（２１）に連通する天井内部の空気導入ダクト（２２）との間に段差を設け、該外気導入ダクト（４１）が該空気導入ダクト（２２）より上下方向下方に位置するように構成したので、該外気導入口から水等が該天井内に入り込んだ際に、該段差によって該水が該ダクトより内部に入り込むことを防止できる。
【図面の簡単な説明】
【図１】本発明によるキャビンを備えたトラクタの側面図。
【図２】ルーフの構成を示す平面図。
【図３】同じく側面断面図。
【図４】内外気切換手段の構成を示す側面断面図。
【図５】外気導入口の構成を示す斜視図。
【図６】外気遮断時における内外気切換手段の構成を示す側面断面図。
【図７】内気遮断時における内外気切換手段の構成を示す側面断面図。
【図８】内外気切換板に取り付けるレバーの構成を示す平面図部分断面図。
【図９】レバーガイドの平面図。
【符号の説明】
６０内外気切換板
６２レバー[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a technology of a cabin configuration of a traveling machine body including an air conditioner.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, in a work vehicle such as a tractor, a configuration in which an operation unit is covered with a cabin and an air conditioner that performs air conditioning or ventilation in the cabin is disposed in the work vehicle is widely used. And in such a structure, the inlet port which inhales from the inside and the exterior of a cabin is provided, respectively, The opening-closing type which plugs up this inlet port in the connection part of the duct which introduces air into this air conditioner, and this inlet port There is known a technique in which inside / outside air switching means such as a shutter is provided so that inside air or outside air can be selectively introduced (see Patent Documents 1 and 2).
[0003]
[Patent Document 1]
JP-A-9-95121 [Patent Document 2]
Japanese Patent Laid-Open No. 2001-253224
[Problems to be solved by the invention]
However, in the above configuration, the inside / outside air switching means requires many parts and an assembly process, which causes an increase in the manufacturing cost of the cabin. Further, in the configuration in which the outside air introduction port is provided, the number of parts and the assembly process are increased due to the duct provided at the introduction port. Furthermore, when water flows in from the introduction port at the time of car washing or the like, other members arranged in the ceiling may get wet with water or water may enter the cabin.
[0005]
[Means for Solving the Problems]
The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.
[0006]
In Claim 1, the air conditioner (21) is arrange | positioned in the front side of the ceiling of the cabin (9) which covers the driving | running | working part of a traveling body, and the external air introduction port (21) to this air conditioner (21) on the back side ( 40), the air conditioner (21) and the outside air introduction port (40) are communicated with each other by an outside air introduction duct (41) and an air introduction duct (22) as an intake portion, and the inside and outside air is connected to the intake portion. A cabin structure comprising switching means and capable of switching between inside air circulation and outside air introduction, wherein the inside / outside air cutting means is constituted by an inside / outside air switching plate (60) which is L-shaped in a side view by a plate-like member. Then, one end opposite to the outside air introduction port (40) is rotatably supported, a lever (62) is fixed to the inside / outside air switching plate (60), and the end of the lever (62) is attached to the cabin ( 9) The inside / outside air switching plate (60) can be operated by projecting to the inside, and the flat member is substantially straight when viewed from the side. The vertical surface portion behind the bent portion is the outside air blocking portion (60a), the front plane portion is the inside air blocking portion (60b), and the inside / outside air switching plate (60) is the bent portion. Is arranged so that the outside air blocking portion (60a) protrudes downward, and a shielding plate (44) is provided between the outside air introduction duct (41) and the air introduction duct (22). The front surface of the shielding plate (44) is provided with an opening (44a), communicates with the air introduction duct (22), and the rear end of the air introduction duct (22) of the inner roof (23) of the cabin (9). An opening (23c) in the vertical direction is provided in the vicinity of the portion, and the air introduction duct (22) and the cabin (9) communicate with each other to form an inside air introduction port (50), and the inside / outside air switching plate (60) is provided. Rotating downward, the opening (44a) of the shielding plate (44) The inside air inlet (50) that is opened and the inside air shut-off portion (60b) of the inside / outside air switching plate (60) is covered and contacted with the inner roof (23), and the interior of the cabin (9) and the air introduction duct ( 22), the internal / external air switching plate (60) is rotated upward, the internal air introduction port (50) is opened, and the internal / external air switching plate (60) is shut off from the outside air. The portion (60a) is brought into contact with the opening (44a) of the shielding plate (44) so as to block the inflow of air from the outside air introduction duct (41) to the air introduction duct (22). It is.
[0007]
According to a second aspect of the present invention, in the cabin structure according to the first aspect, the lever (62) for operating the inside / outside air switching plate (60) is formed of an elastic member, and the lever (62) is formed in the cabin (9 ) And is inserted into a lever guide (66) provided with locking portions at both ends of the long hole .
[0008]
According to Claim 3, in the cabin structure according to Claim 1 , between the outside air introduction port (40) of the intake section and the air introduction duct (22) inside the ceiling communicating with the air conditioner (21). Is provided so that the outside air introduction duct (41) is positioned below the air introduction duct (22) in the vertical direction .
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the invention will be described. 1 is a side view of a tractor equipped with a cabin according to the present invention, FIG. 2 is a plan view showing the configuration of a roof, FIG. 3 is a side sectional view, and FIG. 4 is a side sectional view showing the configuration of inside / outside air switching means. 5 is a perspective view showing the configuration of the outside air introduction port, FIG. 6 is a side sectional view showing the configuration of the inside / outside air switching means when the outside air is shut off, and FIG. 7 is a side sectional view showing the configuration of the inside / outside air switching means when the inside air is shut off, FIG. 8 is a partial cross-sectional view of the lever attached to the inside / outside air switching plate, and FIG. 9 is a plan view of the lever guide.
[0010]
First, the whole structure of the tractor 1 provided with the cabin 9 by this invention is demonstrated using FIG. Front wheels 3 and 3 are supported on the engine frame 2 via a front axle case, a transmission case 4 is disposed on the rear of the engine frame 2 via a clutch housing, and a rear axle case is provided on both sides of the transmission case 4. Rear wheels 5 and 5 are supported. A work machine can be mounted on the rear part of the mission case 4 via a work machine mounting device including a top link, a lower link, and the like. A front wheel drive output shaft projects forward from the front lower portion of the transmission case 4 so that the front wheels 3 and 3 can be driven via a universal joint, a transmission shaft, and the like.
[0011]
An engine 5 is mounted on the engine frame 2, and the engine 5 is covered with a hood 6. A steering handle 7 and a seat 8 are arranged at the rear part of the bonnet 6 to constitute a driving part, and the driving part is covered with a cabin 9. The cabin 9 has the cabin frames 10, 10, 11, and 11 erected from the engine frame and the transmission case 4, the upper surface is covered with a roof 20 to form a ceiling portion, the front surface is a windshield, and the side surfaces are doors 12, 12. The rear surface is covered with rear glass.
[0012]
Next, the arrangement of the air conditioner 21 on the roof 20 of the cabin 9 and the structure of the air introduction duct 22 used in the air conditioner 21 will be described with reference to FIGS. An air conditioner 21 is disposed on one side of the roof 20 in the front and rear sides (front portion in this embodiment), and an air intake portion is disposed on the front and rear other side (rear portion). The roof 20 includes an inner roof 23 and an outer roof 24, and an air conditioner 21 is disposed between the inner roof 23 and the outer roof 24, and an air conditioner 21 is disposed at the front of the inner roof 23. A recess 23a is formed for storing the. The inner roof 23 and the outer roof 24 can be made of synthetic resin, but the entire roof 20 is made thinner by making the outer roof 24 of sheet metal instead of resin such as blow molding or rotational molding. be able to.
[0013]
An outside air introduction port 40 and an inside air introduction port 50 are provided at the left and right center rear portions of the roof 20 and communicate with the suction side of the air conditioner 21 through a duct. The air conditioner 21 includes a fan 25 and a heat exchanger 26, and a compressor (not shown) is disposed in the vicinity of the engine 5. In the present embodiment, an air conditioner indoor unit is disposed as the air conditioner 21, but a ventilation fan or the like may be disposed as the air conditioner. Further, a band-shaped sealing material 27 is disposed between the inner roof 23 and the outer roof 24. The sealing material 27 extends from the front end portion of the air conditioner 21 to the left and right sides, extends rearward from both sides of the air conditioner 21 toward both sides of the air introduction portion, and is formed in a substantially U shape in plan view. The inner roof 23 and the air conditioner 21 are interposed between the outer roof 24 and the inner roof 23. An air introduction duct 22 formed by the sealing material 27, the inner roof 23, and the outer roof 24 is disposed in the front-rear direction at the center in the left-right direction, and a blow-out duct is formed on both sides and in the front-left center. .. Are communicated with the interior of the cabin 9. Then, the air introduced into the air conditioner 21 from the air introduction duct 22 is discharged to the operating part in the cabin 9 through the blowout ducts 28, 28. The shape, number and position of the outlet are not particularly limited. Further, as shown in FIG. 4, by fixing the heat insulating material 29 formed in a plate shape on the lower surface of the outer roof 24, the temperature of the air in the air introduction duct 22 and the cabin is influenced by the external temperature. Change can be reduced. In the above-described configuration, the outer roof 24 is provided with a concave groove, and the seal member 27 is disposed so as to contact the lower surface of the groove, thereby increasing the rigidity of the outer roof 24 and enhancing the compressibility of the seal member 27. Further, it is possible to further improve the airtightness of the air introduction duct 22.
[0014]
The support plate 30 is placed and fixed on the upper surface of the air conditioner 21 and the rear upper surface 23b of the storage recess 23a so that air does not leak in the storage recess 23a. As shown in FIG. 2, beams 31 and 32 are installed between the cabin frames 10 and 10 and the upper portions of the cabin frames 11 and 11, respectively, and beams 33 and 33 are provided between the upper portions of the cabin frames 10 and 11. Is built. A support plate 30 is installed horizontally between the beams 33 and 33 on the left and right middle portions of the beams 33 and 33, the front of the support plate 30 is on the upper surface of the rear portion of the air conditioner 21, and the rear portion of the support plate 30 is the inner roof. 23 is fixed to the rear upper surface 23b.
[0015]
Next, the configuration of the outside air introduction port 40 and the outside air introduction duct 41 of the roof 20 will be described. As shown in FIG. 3, the rear end portion of the outer roof 24 constituting the ceiling of the cabin 9 protrudes rearward from the rear cabin frames 11 and 11. A lower plate 42 is fixed by adhesion or the like so as to cover the lower surface of the protruding portion 24a of the outer roof 24. An opening for introducing outside air is provided at the center of the lower plate 42, and an outside air introduction filter 43 is attached so as to cover the opening to constitute an outside air introduction port 40.
[0016]
As shown in FIG. 5, a shielding plate 44 formed by bending the plate in a “U” shape in plan view is fixed to the lower plate 42 so as to cover both sides and the front side of the outside air introduction filter 43. . The shielding plate 44 is in contact with the air introduction duct 22 on the front surface thereof, and an opening 44 a is provided on the front surface of the shielding plate 44 and communicates with the air introduction duct 22. The shielding plate 44 and the outer roof 24 constitute an outside air introduction duct 41. In the configuration in which the outside air introduction duct is separately fixed to the outer roof or the configuration in which the duct portion is formed integrally with the outer roof, the outer roof is large, so that a lot of time is required for assembly work, and productivity is increased. It was getting worse. Thus, by configuring the outside air introduction duct 41 in this way, it is possible to make the assembling work of the duct portion easier, and to reduce the number of parts for a configuration in which a separate duct is attached. Further, in this configuration, the inside of the outside air introduction duct 41 can be cleaned by disassembling the outer roof 24 from the roof 20. And since the fixing | fixed part by welding etc. is not exposed outside a vehicle body, it becomes advantageous also in aesthetics. Instead of the shielding plate 44, a projecting portion having a “U” shape in plan view may be integrally provided on the upper surface of the lower plate 42 by drawing or the like, and the outside air introduction duct 41 may be configured by the projecting portion and the outer roof 24. Is possible. When configured in this way, it is possible to further reduce the number of parts and to obtain an advantage that the work of fixing the shielding plate 44 to the lower plate 42 is unnecessary. Further, in any configuration using either the shielding plate 44 or the projecting portion, the lower plate 42 is provided with an opening that constitutes the outside air introduction port 40. Therefore, if only the lower plate 42 is changed, the inner roof 23 is provided. Even if the same member is used, the outside air introduction port 40 can be closed, and components can be shared when manufacturing a tractor that omits the outside air introduction function. Furthermore, the fixing of the shielding plate 44 to the lower plate 42 is made detachable by fastening with bolts or the like, thereby making the inside / outside air switching function optional and adding or deleting the inside / outside air switching function after the manufacture of the tractor 1 It is also possible to do.
[0017]
Further, as shown in FIG. 4, a step 32 a is formed between the upper surface of the lower plate 42 and the upper surface of the beam 32 so that the opening 44 a of the shielding plate 44 is positioned above the outside air introduction port 40 in the vertical direction. Provided. With this configuration, water is stopped by the step 32a when water enters from the outside air introduction port 40 by washing the vehicle body of the tractor 1 and the like, so that water can be prevented from entering the vehicle body.
[0018]
Next, the configuration of the inside air introduction port 50 will be described. As shown in FIG. 4, an opening 23 c in the vertical direction is provided in the vicinity of the rear end portion of the air introduction duct 22 of the inner roof 23, and the air introduction duct 22 communicates with the interior of the cabin 9. Then, an inside air introduction filter 51 is fixed from below so as to cover the opening 23 c, thereby constituting an inside air introduction port 50. The inside air introduction filter 51 is fastened and fixed to the base plate 63 of the rotation fulcrum 61 of the inside / outside air switching means to be described later from the inside of the cabin 9 through the inner roof 23 by screws 52, 52. Yes. By configuring in this way, the filter 51 disposed in the inside air inlet 50 and the member used for fixing the filter 51 can be shared in the cabin roof having different specifications, so that the cost required for the member can be reduced. Become. In addition, since the filter 51 is configured to be detachable from the cabin 9, the filter 51 can be easily replaced.
[0019]
As shown in FIG. 4, an inside / outside air switching means is provided at the rear part of the ceiling, and the inside air circulation and outside air introduction can be switched by the switching means. The switching means includes an inside / outside air switching plate 60, a pivot fulcrum 61 including a hinge or the like for rotatably mounting the switching plate 60, and a lever 62 for operating the switching plate 60. It is arrange | positioned in the position where it is easy to operate. The inside / outside air switching plate 60 is formed by bending a flat member at a substantially right angle and forming a substantially L shape in a side view. Part 60b. The switching plate 60 is disposed such that the bent portion is positioned upward and the outside air blocking portion 60a protrudes downward. The rotation fulcrum 61 rotatably connects the front upper surface of the base plate 63 of the inside / outside air switching plate 60 and the vicinity of the front end of the switching plate 60, and the base plate 63 is connected to the beam from the rear upper surface of the inner roof 23. It is arranged and fixed over the upper surface of 32. The switching plate 60 is turnable in the vertical direction with respect to the inner roof 23. Further, the base plate 63 is provided with an opening extending from the position of the inside air introduction port 50 to the position of the rear end portion of the switching plate 60, and the rear portion of the switching plate 60 from the bent portion extends below the base plate 63. It is configured to be able to rotate. As a result, as shown in FIG. 7, the switching plate 60 is rotated downward so that the room air shut-off section 60b is positioned in the horizontal direction so as to contact and block the room air introduction port 50.
[0020]
Thus, by turning the switching plate 60 downward, the inside air blocking portion 60b is brought into contact with the inner roof 23 so as to cover the inside air introduction port 50, and between the cabin 9 and the air introduction duct 22 is brought into contact. Air flow can be cut off. When the air conditioner 21 is operated, the outside air is purified through the outside air introduction filter 43 of the outside air introduction port 40 and enters the air introduction duct 22 through the opening 44 a of the shielding plate 44, thereby The air is sucked into the machine 21, temperature-adjusted (heat exchange), and discharged into the cabin from the air outlets 28, 28. In this way, outside air can be introduced. Then, as shown in FIG. 6, the switching plate 60 is rotated upward to bring the outside air blocking portion 60a into contact with the opening 44a of the shielding plate 44, and from the outside air introduction duct 41 to the air introduction duct 22. Inflow of air can be blocked. When the air conditioner 21 is operated, the outside air is not inhaled, and the air in the cabin enters the space surrounded by the switching plate 60 via the filter 51 disposed in the inside air introduction port 50 and the opening 23c, It enters into the air introduction duct 22 from both sides, is sucked into the air conditioner 21 and is adjusted in temperature (heat exchange), and is discharged into the cabin through the outlets 28, 28. In this way, inside air circulation is possible. Sealing members 64 and 65 made of a flat plate made of urethane or the like are fixed to the surface of the outside air blocking portion 60a that contacts the shielding plate 44 and the surface of the inside air blocking portion 60b that contacts the inner roof 23, respectively. Increases sex.
[0021]
As shown in FIG. 8, the lever 62 for operating the inside / outside air switching plate is composed of a flat plate member 62a having elastic force such as a leaf spring, and the plane of the flat plate member 62a is substantially parallel to the perpendicular to the vertical direction. The one end of the flat plate member 62a is fixed to one end of the inside / outside air switching plate 60 by rivets 65, 65 or the like. And the grip part 62b is fixed to the other end part, and as shown in FIG. 4, it protrudes in the cabin 9 diagonally from the opening part 23d provided in front of the beam 32 at the rear part of the inner roof 23. . As shown in FIG. 9, a lever guide 66 formed by providing a long hole 66a in a flat plate member is fixed to the outside of the opening 23d of the inner roof 23, and the end of the lever 62 is extended from the long hole 66a. Is protruding. Locking portions 66b and 66b are formed at the upper and lower ends of the long hole 66a by notches slightly toward the inside of the lever guide 66 from the direction perpendicular to the longitudinal direction of the long hole 66a. The shape is substantially “U”. Then, the flat plate member 62a of the lever 62 is deformed (bent to the left in FIG. 9) and operated along the elongated hole 66a, and the lever 62 is moved and fitted from the end of the elongated hole 66a to the locking portion 62. By combining, the lever 62 can be fixed to the locking portion 66b by the elastic force of the flat plate member 62a constituting the lever 62. With this configuration, the inside / outside air switching plate 60 can be held at either the position where the outside air introduction port 40 is blocked or the position where the inside air introduction port 50 is blocked by the elastic force of the flat plate member 62a. It becomes. Therefore, the number of parts can be reduced as compared with the configuration in which the inside / outside air switching plate 60 is held by biasing with a spring or the like. Further, when the tractor 1 is traveling, it is possible to prevent the inside / outside air switching plate 60 from vibrating and generating noise.
[0022]
Further, by configuring as described above, members such as the inside / outside air switching plate 60, the base plate 63, the inside air introduction filter 51, and the like can be attached to the inner roof 23 before the assembly process of the roof 20. Become. As a result, the number of steps required for assembly can be reduced.
[0023]
【The invention's effect】
Since the present invention is configured as described above, the following effects can be obtained.
[0024]
As shown in claim 1, an air conditioner (21) is disposed on the front side of the ceiling of the cabin (9) covering the operating part of the traveling machine body, and an outside air introduction port to the air conditioner (21) is provided on the rear side. (40) is provided, and the air conditioner (21) and the outside air introduction port (40) are communicated with each other by an outside air introduction duct (41) and an air introduction duct (22) as an intake portion, and the inside and outside of the intake portion are connected. A cabin structure comprising air switching means and capable of switching between internal air circulation and external air introduction, wherein the internal / external air cutting means is an L-shaped internal / external air switching plate (60) having a L-shape in side view by a plate-like member. And one end opposite to the outside air inlet (40) is rotatably supported, a lever (62) is fixed to the inside / outside air switching plate (60), and the end of the lever (62) is connected to the cabin. (9) The inside / outside air switching plate (60) can be operated by projecting to the inside, and the plate-like member is substantially straight when viewed from the side. The vertical surface portion behind the bent portion is the outside air blocking portion (60a), the front plane portion is the inside air blocking portion (60b), and the inside / outside air switching plate (60) is the bent portion. Is arranged so that the outside air blocking portion (60a) protrudes downward, and a shielding plate (44) is provided between the outside air introduction duct (41) and the air introduction duct (22). The front surface of the shielding plate (44) is provided with an opening (44a), communicates with the air introduction duct (22), and the rear end of the air introduction duct (22) of the inner roof (23) of the cabin (9). An opening (23c) in the vertical direction is provided in the vicinity of the portion, and the air introduction duct (22) and the cabin (9) communicate with each other to form an inside air introduction port (50), and the inside / outside air switching plate (60) is provided. Rotating downward, the opening (44a) of the shielding plate (44) The inside air inlet (50) that is opened and the inside air shut-off portion (60b) of the inside / outside air switching plate (60) is covered and contacted with the inner roof (23), and the interior of the cabin (9) and the air introduction duct ( 22), the internal / external air switching plate (60) is rotated upward, the internal air introduction port (50) is opened, and the internal / external air switching plate (60) is shut off from the outside air. Since the portion (60a) is in contact with the opening (44a) of the shielding plate (44) so as to block the inflow of air from the outside air introduction duct (41) to the air introduction duct (22). Thus, the inside / outside air switching means can be configured with a smaller number of parts and an assembling process.
[0025]
According to a second aspect of the present invention, the lever (62) for operating the inside / outside air switching plate (60) is formed of an elastic member, and the lever (62) is disposed inside the cabin (9) and has a long hole. Since it is inserted into the lever guide (66) having the locking portions at both ends, the inside / outside air switching plate can be held in one of the inside air blocking position and the outside air blocking position with a smaller number of parts, and the inside / outside air switching can be performed. Generation of noise due to vibration of the plate can be prevented.
[0026]
A step is provided between the outside air introduction port (40) of the intake section and the air introduction duct (22) in the ceiling communicating with the air conditioner (21), and the outside air introduction duct is provided. Since (41) is configured to be positioned below the air introduction duct (22) in the vertical direction , when water or the like enters the ceiling from the outside air introduction port, the water is removed from the duct by the step. It can prevent entering inside.
[Brief description of the drawings]
FIG. 1 is a side view of a tractor provided with a cabin according to the present invention.
FIG. 2 is a plan view showing a configuration of a roof.
FIG. 3 is a side sectional view of the same.
FIG. 4 is a side sectional view showing the configuration of the inside / outside air switching means.
FIG. 5 is a perspective view showing a configuration of an outside air inlet.
FIG. 6 is a side sectional view showing the configuration of the inside / outside air switching means when outside air is shut off.
FIG. 7 is a side sectional view showing the configuration of the inside / outside air switching means when the inside air is shut off.
FIG. 8 is a partial cross-sectional view showing a configuration of a lever attached to the inside / outside air switching plate.
FIG. 9 is a plan view of a lever guide.
[Explanation of symbols]
60 Inside / outside air switching plate 62 Lever

Claims

An air conditioner (21) is arranged on the front side of the ceiling of the cabin (9) that covers the operating part of the traveling machine body, and an outside air inlet (40) to the air conditioner (21) is arranged on the rear side. The air conditioner (21) and the outside air introduction port (40) are communicated with each other by an outside air introduction duct (41) and an air introduction duct (22) as an intake portion, and the inside and outside air switching means is provided in the intake portion, A cabin structure that enables switching between circulation and outside air introduction, wherein the inside / outside air cutting means is constituted by an inside / outside air switching plate (60) having an L-shape in a side view by a plate-like member, and an outside air introduction port ( 40) is rotatably supported at one end, and a lever (62) is fixed to the inside / outside air switching plate (60), and the end of the lever (62) projects into the cabin (9). The inside / outside air switching plate (60) can be operated by bending a flat plate member at a substantially right angle in a side view. The vertical surface portion behind the bent portion is the outside air blocking portion (60a), the front plane portion is the inside air blocking portion (60b), and the inside / outside air switching plate (60) has the bent portion arranged above the outside air. The blocking portion (60a) is configured to protrude downward, and a shielding plate (44) is provided at a position between the outside air introduction duct (41) and the air introduction duct (22), and the shielding plate (44). An opening (44a) is provided on the front surface of the air passage, communicates with the air introduction duct (22), and in the vicinity of the rear end of the air introduction duct (22) of the inner roof (23) of the cabin (9). An opening (23c) is provided, and the air introduction duct (22) and the cabin (9) communicate with each other to form an inside air introduction port (50), and the inside / outside air switching plate (60) is rotated downward, Opening the opening (44a) of the shielding plate (44) Air between the inside of the cabin (9) and the air introduction duct (22) is formed by contacting the inside air introduction port (50) in which the inside air blocking portion (60b) of the plate (60) is opened to the inner roof (23). , The inside / outside air switching plate (60) is rotated upward, the inside air introduction port (50) is opened, and the outside air blocking portion (60a) of the inside / outside air switching plate (60) is shielded. A cabin structure characterized by being configured to contact the opening (44a) of the plate (44) so as to block the inflow of air from the outside air introduction duct (41) to the air introduction duct (22). .

The cabin structure according to claim 1, wherein the lever (62) for operating the inside / outside air switching plate (60) is formed of an elastic member, and the lever (62) is disposed inside the cabin (9). A cabin structure characterized by being inserted into a lever guide (66) having locking portions at both ends of a long hole .

The cabin structure according to claim 1, wherein a step is provided between an outside air introduction port (40) of the intake section and an air introduction duct (22) inside the ceiling communicating with the air conditioner (21), A cabin structure characterized in that the outside air introduction duct (41) is positioned below the air introduction duct (22) in the vertical direction .