JP5188330B2

JP5188330B2 - Defroster

Info

Publication number: JP5188330B2
Application number: JP2008222398A
Authority: JP
Inventors: 善三内田; 剛中原; 博史飛田
Original assignee: Yanmar Co Ltd
Current assignee: Yanmar Co Ltd
Priority date: 2008-08-29
Filing date: 2008-08-29
Publication date: 2013-04-24
Anticipated expiration: 2028-08-29
Also published as: JP2010052677A

Description

本発明は、キャビンを搭載する作業車両のデフロスタに関する。 The present invention relates to a defroster for a work vehicle equipped with a cabin.

従来から、ホイールローダ等の作業車両には運転席の周辺をガラスで張り巡らせたキャビン仕様があり、該作業車両には作業者の作業環境を改善するため、キャビン内に空気調整装置が搭載される。 Conventionally, a work vehicle such as a wheel loader has a cabin specification in which the periphery of a driver's seat is stretched with glass, and the work vehicle is equipped with an air conditioning device in the cabin in order to improve a worker's working environment. The

冬場や寒冷地等では、外気によってキャビンのフロントガラスが冷やされ、フロントガラス内側周辺の空気が冷やされる。該空気が水分を多く含む時、冷やされた空気は飽和して、フロントガラス内側に水滴が付着する。そのため、作業者の視界が狭まり、作業車両の操作に支障が出る。 In winter and cold regions, the windshield of the cabin is cooled by outside air, and the air around the inside of the windshield is cooled. When the air contains a lot of moisture, the cooled air is saturated and water droplets adhere to the inside of the windshield. For this reason, the worker's field of view is narrowed, and the operation of the work vehicle is hindered.

上記課題を解決するために、例えば下記に挙げるような空気調整装置で生成された乾燥風や温風、冷風等の空調風を直接当て、フロントガラス内側に付着した水滴をデフロストする方法が提案されている。 In order to solve the above-mentioned problems, for example, a method of defrosting water droplets adhering to the inside of the windshield by directly applying air-conditioning air such as dry air, hot air, or cold air generated by an air conditioner as described below has been proposed. ing.

特許文献１は空気調整装置から延設された送風ダクトにダンパー等による開閉板を開閉する機構を設け、空調風を当ててフロントガラスのデフロストを行っている。特許文献２に関しては、フロントパネル近辺に設けた空気調整装置の吐出口の風向を調整して空調風を当て、フロントガラスのデフロストを行っている。
特開２０００−１６８３４２号公報特開２００５−１１９５３５号公報 In Patent Document 1, a mechanism that opens and closes an opening / closing plate by a damper or the like is provided in a blower duct extending from an air conditioner, and the windshield is defrosted by applying conditioned air. With respect to Patent Document 2, the windshield defrosting is performed by adjusting the wind direction of the discharge port of the air conditioner provided near the front panel to apply the conditioned air.
JP 2000-168342 A JP 2005-119535 A

しかしながら、特許文献１では、コントロールパネル内にデフロスタの開閉装置の制御手段が組み込まれるため、制御システムが複雑になり、多大なコストを要した。また、遠方のダクトの開閉板を操作するため、その機構を組み込み込める十分なスペースが必要となり、デフロスタの配置が自由にならず、結果として十分デフロスト機能が発揮できない位置にデフロスタが配置されることがあった。 However, in patent document 1, since the control means of the opening / closing device of the defroster is incorporated in the control panel, the control system becomes complicated and requires a great deal of cost. In addition, because the opening and closing plate of the remote duct is operated, there is a need for sufficient space for the mechanism to be built in, and the defroster can not be freely placed. As a result, the defroster should be placed at a position where the defrost function cannot be fully demonstrated. was there.

また、特許文献２では、ステアリングパネルに内設されたダクトとフロントウィンドのデフロストが兼用なので、複雑な制御システムや機構がいらず低コスト、省スペースでデフロストが可能であるが、上記同様にダクトの配置が自由にならないため、デフロスタの能力が不足していることがあった。また、兼用であるためにデフロスタと空調の同時使用ができないという問題もあった。 Further, in Patent Document 2, since the duct built in the steering panel and the front window defrost are used together, a complicated control system and mechanism are not required, and low cost and space saving can be achieved. The placement of the defroster was not enough, so the defroster's ability was insufficient. There is also a problem that the defroster and the air conditioner cannot be used at the same time because they are shared.

そこで、本発明の課題は簡単な構成で十分なデフロスト効果を有するデフロスタを提供することにある。 Therefore, an object of the present invention is to provide a defroster having a simple structure and a sufficient defrost effect.

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。 The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

請求項１においては、運転席（９）と、ステアリングハンドル（８）と、該運転席（９）とステアリングハンドル（８）を覆うキャビン（６）と、該キャビン（６）内の空気を調整する空気調整装置（７）を備えた作業車両（１）において、前記空気調整装置（７）により調整した空気を、キャビン（６）のフロントガラス（１８）の内側に吐出するようにしたデフロスタを具備し、前記空気調整装置（７）より延設される送風ホース（１７）と、前記ステアリングハンドル（８）の前方に配置されてデフロスタ用吐出部（２０）と、前記送風ホース（１７）と前記デフロスタ用吐出部（２０）の間に介装される送風ダクト（２２）とを備え、該送風ダクト（２２）は略箱型で上方と前方が開放され、下面に連通孔を開口して送風ホース（１７）を接続し、上面は開放され、デフロスタ用吐出部（２０）と接続され、前方の正面は開放され、前記フロントガラス（１８）を配置するフロントパネル（１９）に固設し、内部に上下方向に送風路を形成し、該送風ダクト（２２）の前下部または後下部に回動軸（２４）を左右方向に回転自在に枢支し、該送風ダクト（２２）内の回動軸（２４）上に開閉板（２１）の一端を固設し、該開閉板（２１）は送風ダクト（２２）の下面に設けられた開口部を十分塞ぐことが可能な四角形状板材で構成したものである。 In claim 1, the driver's seat (9), the steering handle (8), the cabin (6) covering the driver's seat (9) and the steering handle (8), and the air in the cabin (6) are adjusted. In a work vehicle (1) equipped with an air conditioner (7) that performs a defroster that discharges the air adjusted by the air conditioner (7) to the inside of the windshield (18) of the cabin (6). A blower hose (17) extending from the air conditioning device (7), a defroster discharge part (20) disposed in front of the steering handle (8), and the blower hose (17). A blower duct (22) interposed between the defroster discharge section (20). The blower duct (22) is substantially box-shaped, open at the top and front, and has a communication hole at the bottom. Blower hose (1 ), The upper surface is opened, the defroster discharge part (20) is connected, the front front is opened, and is fixed to the front panel (19) on which the windshield (18) is placed, An air passage is formed in the direction, and a rotating shaft (24) is pivotally supported in the left-right direction at the front lower part or the rear lower part of the air duct (22), and the rotating shaft ( 24) One end of the opening / closing plate (21) is fixed on the opening / closing plate (21), and the opening / closing plate (21) is made of a rectangular plate material that can sufficiently close the opening provided on the lower surface of the air duct (22). It is.

請求項２においては、請求項１記載のデフロスタにおいて、前記回動軸（２４）の一端は送風ダクト（２２）より外側に突出して手動操作手段となる操作レバー部（２４ａ）と連結され、該操作レバー部（２４ａ）と送風ダクト（２２）との間に、該開閉板（２１）を開位置と閉位置に保持する保持手段を設け、該保持手段は、操作レバー部（２４ａ）側の前記開閉板（２１）と送風ダクト（２２）内面との間の回動軸（２４）の外周にバネ（２４ｂ）を巻回し、該送風ダクト（２２）外側の回動軸（２４）上には回転を阻止するために突出部（２４ｃ）を設け、該回動軸（２４）に設けた突出部（２４ｃ）がバネ（２４ｂ）の付勢力により送風ダクト（２２）側面に押し付けられて掛止可能とし、該開閉板（２１）を上方へ回動した開位置と、下方へ回動した閉位置に保持可能としたものである。 According to a second aspect of the present invention, in the defroster according to the first aspect, one end of the rotating shaft (24) protrudes outward from the air duct (22) and is connected to an operation lever portion (24a) serving as a manual operation means, A holding means for holding the opening / closing plate (21) in the open position and the closed position is provided between the operation lever part (24a) and the air duct (22), and the holding means is provided on the operation lever part (24a) side. A spring (24b) is wound around the outer periphery of the rotating shaft (24) between the opening / closing plate (21) and the inner surface of the air duct (22), and on the rotating shaft (24) outside the air duct (22). Is provided with a protrusion (24c) to prevent rotation, and the protrusion (24c) provided on the rotating shaft (24) is pressed against the side surface of the air duct (22) by the biasing force of the spring (24b). Open position where the opening and closing plate (21) is turned upward Is obtained by can be held in the closed position rotated downward.

請求項３においては、請求項１記載のデフロスタにおいて、前記開閉板（２１）の一端は送風ダクト（２２）に回転自在に枢支した回動部に固設され、前記送風ダクト（２２）の側面には、前記回動軸（２４）を中心とする円弧状の長孔（２２ｄ）が開口され、前記開閉板（２１）の他端の側部に、前記長孔を貫通して、開閉板（２１）と送風ダクト（２２）とを締付固定し、操作手段を兼ねる締結手段を設けたものである。 According to a third aspect of the present invention, in the defroster according to the first aspect, one end of the opening / closing plate (21) is fixed to a rotating portion pivotally supported by the air duct (22) so as to be rotatable. An arc-shaped long hole (22d) centering on the rotation shaft (24) is opened on the side surface, and the opening and closing plate (21) is opened and closed by penetrating the long hole on the side of the other end. The plate (21) and the air duct (22) are fastened and fixed, and a fastening means that also serves as an operating means is provided .

本発明の効果として、以下に示すような効果を奏する。
請求項１の如く、運転席（９）と、ステアリングハンドル（８）と、該運転席（９）とステアリングハンドル（８）を覆うキャビン（６）と、該キャビン（６）内の空気を調整する空気調整装置（７）を備えた作業車両（１）において、前記空気調整装置（７）により調整した空気を、キャビン（６）のフロントガラス（１８）の内側に吐出するようにしたデフロスタを具備し、前記空気調整装置（７）より延設される送風ホース（１７）と、前記ステアリングハンドル（８）の前方に配置されてデフロスタ用吐出部（２０）と、前記送風ホース（１７）と前記デフロスタ用吐出部（２０）の間に介装される送風ダクト（２２）とを備え、該送風ダクト（２２）は略箱型で上方と前方が開放され、下面に連通孔を開口して送風ホース（１７）を接続し、上面は開放され、デフロスタ用吐出部（２０）と接続され、前方の正面は開放され、前記フロントガラス（１８）を配置するフロントパネル（１９）に固設し、内部に上下方向に送風路を形成し、該送風ダクト（２２）の前下部または後下部に回動軸（２４）を左右方向に回転自在に枢支し、該送風ダクト（２２）内の回動軸（２４）上に開閉板（２１）の一端を固設し、該開閉板（２１）は送風ダクト（２２）の下面に設けられた開口部を十分塞ぐことが可能な四角形状板材で構成したので、簡単な構造のデフロスタ開閉装置が実現できて、低コストでかつ省スペースで、十分な能力を有するデフロストとなる。そして、手動操作手段により開閉板を開閉操作して、容易にデフロストとして作用させたり、送風を停止させたりすることができる。
請求項２の如く、請求項１記載のデフロスタにおいて、前記回動軸（２４）の一端は送風ダクト（２２）より外側に突出して手動操作手段となる操作レバー部（２４ａ）と連結され、該操作レバー部（２４ａ）と送風ダクト（２２）との間に、該開閉板（２１）を開位置と閉位置に保持する保持手段を設け、該保持手段は、操作レバー部（２４ａ）側の前記開閉板（２１）と送風ダクト（２２）内面との間の回動軸（２４）の外周にバネ（２４ｂ）を巻回し、該送風ダクト（２２）外側の回動軸（２４）上には回転を阻止するために突出部（２４ｃ）を設け、該回動軸（２４）に設けた突出部（２４ｃ）がバネ（２４ｂ）の付勢力により送風ダクト（２２）側面に押し付けられて掛止可能とし、該開閉板（２１）を上方へ回動した開位置と、下方へ回動した閉位置に保持可能としたので、簡単な構造のデフロスタ開閉装置が実現できて、開閉板開位置と閉位置で容易に保持させることができる。
請求項３の如く、請求項１記載のデフロスタにおいて、前記開閉板（２１）の一端は送風ダクト（２２）に回転自在に枢支した回動部に固設され、前記送風ダクト（２２）の側面には、前記回動軸（２４）を中心とする円弧状の長孔（２２ｄ）が開口され、前記開閉板（２１）の他端の側部に、前記長孔を貫通して、開閉板（２１）と送風ダクト（２２）とを締付固定し、操作手段を兼ねる締結手段を設けたので、簡単な構造のデフロスタ開閉装置が実現できて、開閉板を任意の位置で固定することが可能となり、送風量を調節でき、また、開位置では長孔より側方へ送風することも可能となり、デフロスタの送風範囲の広範囲化となる。 As effects of the present invention, the following effects can be obtained.
As in claim 1, the driver's seat (9), the steering handle (8), the cabin (6) covering the driver's seat (9) and the steering handle (8), and the air in the cabin (6) are adjusted. In a work vehicle (1) equipped with an air conditioner (7) that performs a defroster that discharges the air adjusted by the air conditioner (7) to the inside of the windshield (18) of the cabin (6). A blower hose (17) extending from the air conditioning device (7), a defroster discharge part (20) disposed in front of the steering handle (8), and the blower hose (17). A blower duct (22) interposed between the defroster discharge section (20). The blower duct (22) is substantially box-shaped, open at the top and front, and has a communication hole at the bottom. Blower hose (17) Connected, open on top, connected to defroster discharge section (20), open front front, fixed on front panel (19) on which windshield (18) is placed, and vertically inside A ventilation path is formed, and a rotation shaft (24) is pivotally supported in the front lower part or rear lower part of the ventilation duct (22) so as to be rotatable in the left-right direction, and the rotation shaft (24) in the ventilation duct (22). Since one end of the opening / closing plate (21) is fixed on the upper side, and the opening / closing plate (21) is made of a rectangular plate material that can sufficiently close the opening provided on the lower surface of the air duct (22) , A defroster opening / closing device having a simple structure can be realized, and the defrosting can be performed at a low cost, in a small space, and with sufficient capacity. Then, the opening / closing plate can be opened / closed by the manual operation means to easily act as defrost or to stop the blowing.
As in claim 2, in the defroster according to claim 1, one end of the rotating shaft (24) protrudes outward from the air duct (22) and is connected to an operation lever portion (24a) serving as a manual operation means, A holding means for holding the opening / closing plate (21) in the open position and the closed position is provided between the operation lever part (24a) and the air duct (22), and the holding means is provided on the operation lever part (24a) side. A spring (24b) is wound around the outer periphery of the rotating shaft (24) between the opening / closing plate (21) and the inner surface of the air duct (22), and on the rotating shaft (24) outside the air duct (22). Is provided with a protrusion (24c) to prevent rotation, and the protrusion (24c) provided on the rotating shaft (24) is pressed against the side surface of the air duct (22) by the biasing force of the spring (24b). An open position where the opening and closing plate (21) is rotated upward; Since the possible held in a closed position pivoted towards, defroster switchgear having a simple structure is realized, can be easily held by the closing plate open and closed positions.
According to a third aspect of the present invention, in the defroster according to the first aspect, one end of the opening / closing plate (21) is fixed to a rotating portion pivotally supported by the air duct (22), and An arc-shaped long hole (22d) centering on the rotation shaft (24) is opened on the side surface, and the opening and closing plate (21) is opened and closed by penetrating the long hole on the side of the other end. Since the plate (21) and the air duct (22) are fastened and fixed, and the fastening means that also serves as the operating means is provided, a defroster opening and closing device with a simple structure can be realized, and the opening and closing plate can be fixed at an arbitrary position. It is possible to adjust the amount of air flow, and it is also possible to blow air to the side from the long hole at the open position, thereby widening the air blowing range of the defroster.

次に、本発明の作業車両に装着時の実施形態を説明する。図１は本発明のデフロスタを装着した作業車両の全体側面図、図２は本発明のデフロスタを装着した作業車両のキャビン側面図、図３は（ａ）本発明のデフロスタの図で左正面図、（ｂ）同じく右正面図、図４は（ａ）本発明のデフロスタ側面図で閉時の図、（ｂ）同じく開時の図、図５は他の実施例のデフロスタの左正面図、図６は（ａ）他の実施例のデフロスタ側面図で閉時の図、（ｂ）同じく開時の図である。 Next, an embodiment of the present invention when mounted on a work vehicle will be described. 1 is an overall side view of a work vehicle equipped with the defroster of the present invention, FIG. 2 is a side view of a cabin of the work vehicle equipped with the defroster of the present invention, and FIG. 3A is a left front view of the defroster of the present invention. FIG. 4 is a side view of the defroster according to the present invention when closed, FIG. 4 is a view when opened, and FIG. 5 is a left front view of a defroster according to another embodiment. 6A is a side view of a defroster according to another embodiment, and FIG. 6B is a view when the defroster is closed, and FIG.

まず、本発明のデフロスタを取り付けたホイールローダ１の全体構成を説明する。図１に示すように、ホイールローダ１はフロントフレーム２とリヤフレーム４を屈曲可能にしたアーティキュレート式で、フロントフレーム２には作業装置３を備え、リヤフレーム４にはエンジン５、キャビン６等を備える。 First, the whole structure of the wheel loader 1 to which the defroster of the present invention is attached will be described. As shown in FIG. 1, the wheel loader 1 is an articulated type in which a front frame 2 and a rear frame 4 are bendable. The front frame 2 is provided with a working device 3, and the rear frame 4 includes an engine 5, a cabin 6, and the like. Is provided.

キャビン６は図２に示すように空気調整装置（室内機）７、ステアリングハンドル８、運転席９、ステアリングコラム１０、ステアリングシャフト１１、作業操作パネル１２、作業操作ペダル１３、分配ボックス１４、作業操作レバー１６、デフロスタ用吐出部２０等を備える。 As shown in FIG. 2, the cabin 6 includes an air conditioner (indoor unit) 7, a steering handle 8, a driver's seat 9, a steering column 10, a steering shaft 11, a work operation panel 12, a work operation pedal 13, a distribution box 14, and a work operation. The lever 16 and the defroster discharge part 20 are provided.

運転席９の四方向はキャビン６で覆われており、運転席前方にはステアリングコラム１０がリヤフレーム４より斜め上方に突出して配置され、ステアリングコラム１０上端には作業操作パネル１２が設けられている。また、ステアリングコラム１０からはステアリングシャフト１１が突出して設けられ、その上端にはステアリングハンドル８が設けられている。ステアリングコラム１０の下方には作業操作ペダル１３が配置される。 The four directions of the driver's seat 9 are covered with a cabin 6, a steering column 10 is disposed to protrude obliquely upward from the rear frame 4 in front of the driver's seat, and a work operation panel 12 is provided at the upper end of the steering column 10. Yes. A steering shaft 11 protrudes from the steering column 10 and a steering handle 8 is provided at the upper end thereof. A work operation pedal 13 is disposed below the steering column 10.

運転席９の下方には分配ボックス１４と空気調整装置７が配設され、空気調整装置７は不図示のエバポレータ、レシーバ、送風手段、ヒータユニット等で構成されている。空気調整装置７には分配ボックス１４が接続され、該分配ボックス１４には複数の送風ホース１７・１７・・・が接続され、該送風ホース１７・１７・・・の他端には、空調用吐出部１５・１５とデフロスタ用吐出部２０が接続される。空調用吐出部１５・１５はステアリングコラム１０の左右両側方に配置され、キャビンを構成するフレームに取り付けられ、運転席９に着座した作業者に向けて調整後の空気が吐出される。デフロスタ用吐出部２０はステアリングハンドル８の前方であって、フロントウィンド下部のフロントパネル１９に固設され、フロントウィンドの内面に下方から上方に向けて調整後の空気が吐出される。こうして、空気調整装置７で調整された空調風は分配ボックス１４で分配され、送風ホース１７・１７・・・を介してそれぞれ空調用吐出部１５・１５とデフロスタ用吐出部２０に送風される。 A distribution box 14 and an air conditioning device 7 are disposed below the driver's seat 9, and the air conditioning device 7 includes an evaporator, a receiver, a blower, a heater unit, and the like (not shown). A distribution box 14 is connected to the air conditioning device 7, and a plurality of blower hoses 17, 17... Are connected to the distribution box 14, and the other end of the blower hoses 17, 17. The discharge parts 15 and 15 and the defroster discharge part 20 are connected. The air-conditioning discharge sections 15 and 15 are disposed on both the left and right sides of the steering column 10 and are attached to the frame constituting the cabin, and the adjusted air is discharged toward the operator seated on the driver's seat 9. The defroster discharge unit 20 is fixed to the front panel 19 at the lower part of the front window, in front of the steering handle 8, and the adjusted air is discharged from the lower side to the upper side on the inner surface of the front window. Thus, the conditioned air adjusted by the air conditioner 7 is distributed by the distribution box 14 and is sent to the air-conditioning discharge sections 15 and 15 and the defroster discharge section 20 through the blower hoses 17, 17.

前記送風ホース１７は、分配ボックス１４からホイールローダ１の操作の邪魔にならず、美観が損なわれないように、リヤフレーム４の上であって、不図示のフロアマット下を通過させて、キャビンの内壁部から上方向に向けて突出し、空調用吐出部１５・１５とデフロスタ用吐出部２０に接続される。 The blower hose 17 passes above the rear frame 4 and below the floor mat (not shown) so as not to obstruct the operation of the wheel loader 1 from the distribution box 14 and to impair the aesthetics. It protrudes upward from the inner wall of the air-conditioner and is connected to the air-conditioning discharge sections 15 and 15 and the defroster discharge section 20.

デフロスタは、空気調整装置７、分配ボックス１４、送風ホース１７、デフロスタ用吐出部２０等を備え、送風ホース１７とデフロスタ用吐出部２０の間に送風ダクト２２が配置され、該送風ダクト２２に開閉板２１や操作レバー部２４ａ等を備える。なお、本実施例では、デフロスタ用吐出部２０と送風ダクト２２を一体的に構成しているが、別々に構成することも可能であり、送風ダクト２２を操作し易い送風ホース１７の途中に配設する構成とすることもできる。 The defroster includes an air conditioning device 7, a distribution box 14, a blower hose 17, a defroster discharge part 20, and the like. A blower duct 22 is disposed between the blower hose 17 and the defroster discharge part 20, and opens and closes to the blower duct 22. The plate 21 and the operation lever part 24a are provided. In this embodiment, the defroster discharge section 20 and the air duct 22 are integrally formed. However, the defroster discharge section 20 and the air duct 22 can be separately configured, and are arranged in the middle of the air hose 17 in which the air duct 22 is easily operated. It can also be set as the structure to install.

送風ダクト２２の第一実施例を説明する。図３、図４のように、送風ダクト２２は略箱型で上方と前方が開放され、下面に連通孔を開口して送風ホース１７を接続する構成としている。つまり、前記送風ダクト２２は底面に送風ホース１７を嵌め込む開口部が穿設され、上面は開放されており、溶接等でデフロスタ用吐出部２０と接続される。正面は開放され、フロントパネル１９に固設するための固定部２２ｂを有し、ボルトナット２２ｃ等を用いて固設される。こうして上下方向に送風路が形成される。送風ダクト２２の前下部または後下部に回動軸２４が左右方向に回転自在に枢支され、該送風ダクト２２内の回動軸２４上に開閉板２１の一端が溶接等で固設されている。該開閉板２１は四角形状に構成して、その大きさは送風ダクト２２下面に設けられた開口部を十分塞ぐことが可能な大きさの板材で構成している。前記回動軸２４の一端は送風ダクト２２側面から突出して操作レバー部２４ａとしている。該操作レバー部２４ａは一端を折り曲げて形成しているが、グリップ等を設けてもよい。こうして送風ダクト２２の外側に手動操作手段を構成している。 A first embodiment of the air duct 22 will be described. As shown in FIG. 3 and FIG. 4, the air duct 22 has a substantially box shape and is open at the top and front, and has a structure in which a communication hole is opened on the lower surface to connect the air hose 17. That is, the blower duct 22 has an opening for fitting the blower hose 17 on the bottom surface, the top surface is open, and is connected to the defroster discharge unit 20 by welding or the like. The front surface is open, has a fixing portion 22b for fixing to the front panel 19, and is fixed using a bolt nut 22c or the like. In this way, a ventilation path is formed in the up-down direction. A rotating shaft 24 is pivotally supported in the front lower part or rear lower part of the air duct 22 so as to be rotatable in the left-right direction, and one end of the opening / closing plate 21 is fixed on the rotating shaft 24 in the air duct 22 by welding or the like. Yes. The opening / closing plate 21 is formed in a quadrangular shape, and the size of the opening / closing plate 21 is configured by a plate material having a size capable of sufficiently closing the opening provided on the lower surface of the air duct 22. One end of the rotating shaft 24 protrudes from the side surface of the air duct 22 and serves as an operation lever portion 24a. The operation lever portion 24a is formed by bending one end, but a grip or the like may be provided. In this way, manual operation means is configured outside the air duct 22.

また、送風ダクト２２と回動軸２４には、開閉板２１を開位置と閉位置に保持する保持手段が設けられて、送風路を開閉板２１により開閉できる構成としている。すなわち、操作レバー部２４ａ側の前記開閉板２１と送風ダクト２２内面との間の回動軸２４の外周にはバネ２４ｂが巻回され、送風ダクト２２外側の回動軸２４上には回転を阻止するために突出部２４ｃが設けられ、送風ダクト２２外側面には適宜な厚さの扇状の保持板２２ａが固設してある。こうして、回動軸２４に設けた突出部２４ｃがバネ２４ｂの付勢力により送風ダクト２２側面に押し付けられ、突出部２４ｃが保持板２２ａの両側で掛止可能とされ、開閉板２１を上方（垂直方向）へ回動した開位置と、下方（水平方向）へ回動した閉位置に保持可能としている。但し、開閉板２１の保持構成は前記構成に限定するものではなく、前記保持板２２ａの表面に鋸歯状の凹凸を形成することにより複数箇所で保持することも可能である。また、突出部２４ｃをＬ字状に折り曲げ、送風ダクト２２外側面に突出部２４ｃ先端を挿入する孔を回動軸２４を中心とした同心円上に適宜間隔を開けることで、複数箇所で保持する構成とすることもできる。また、突出部２４ｃと保持板２２ａを送風ダクト２２内に配置する構成とすることも可能である。 In addition, the air duct 22 and the rotating shaft 24 are provided with holding means for holding the opening / closing plate 21 in the open position and the closed position so that the air passage can be opened and closed by the opening / closing plate 21. That is, a spring 24b is wound around the outer periphery of the rotating shaft 24 between the opening / closing plate 21 on the operation lever portion 24a side and the inner surface of the air duct 22 and rotates on the rotating shaft 24 outside the air duct 22. A protrusion 24c is provided to prevent this, and a fan-shaped holding plate 22a having an appropriate thickness is fixed on the outer surface of the air duct 22. Thus, the protrusion 24c provided on the rotating shaft 24 is pressed against the side surface of the air duct 22 by the urging force of the spring 24b, so that the protrusion 24c can be hooked on both sides of the holding plate 22a. It can be held in an open position rotated in the direction) and a closed position rotated in the lower direction (horizontal direction). However, the holding structure of the opening / closing plate 21 is not limited to the above-described structure, and can be held at a plurality of locations by forming serrated irregularities on the surface of the holding plate 22a. Further, the protrusion 24c is bent in an L shape, and holes for inserting the tip of the protrusion 24c on the outer surface of the air duct 22 are held at a plurality of locations by appropriately spacing on a concentric circle with the rotation shaft 24 as the center. It can also be configured. It is also possible to adopt a configuration in which the protruding portion 24 c and the holding plate 22 a are arranged in the air duct 22.

前記送風ダクト２２の上部には送風ガイド２３が一体的に構成され、送風ガイド２３は正面視略逆台形状で、側面視三角形状に構成され、フロントガラス１８の傾斜に沿わせて配設される。送風ガイド２３の下部の短辺で構成される面を前記送風ダクト２２の上面に接続して空調風を取り入れ可能としている。送風ガイド２３の上部の長辺で構成される上面は開放されて吐出口２３ａとして、上左右両側に広がって空調風を吐出するようにしている。送風ガイド２３の側面には上下に長い長孔状の開口部２３ｂが設けられ、側方へ空調風を吐出することを可能とし、デフロストの範囲を拡大することができる。 A blower guide 23 is integrally formed on the upper portion of the blower duct 22, and the blower guide 23 has a substantially inverted trapezoidal shape when viewed from the front and a triangular shape when viewed from the side, and is disposed along the inclination of the windshield 18. The The surface constituted by the short side of the lower part of the blower guide 23 is connected to the upper surface of the blower duct 22 so that conditioned air can be taken in. The upper surface constituted by the long side of the upper part of the blower guide 23 is opened and serves as a discharge port 23a so as to spread on both the upper and left and right sides to discharge the conditioned air. A long hole-like opening 23b is provided on the side surface of the blow guide 23 so as to discharge air-conditioned air to the side, and the range of defrost can be expanded.

上記の如く構成された本発明の形態において、作業者はホイールローダ１の運転席９に座り、ステアリングハンドル８、作業操作パネル１２、作業操作ペダル１３、作業操作レバー１６等を用いて、ホイールローダ１の移動や作業装置３の操作等を行う。 In the embodiment of the present invention configured as described above, an operator sits in the driver's seat 9 of the wheel loader 1 and uses the steering handle 8, the work operation panel 12, the work operation pedal 13, the work operation lever 16, etc. 1 movement, operation of the working device 3 and the like.

フロントガラス１８のデフロストが必要なときは、操作レバー部２４ａを側方へ引っ張った状態で、突出部２４ｃが保持板２２ａを回避させて回動軸２４を時計周りに回転させる。前記回動軸２４の回転に連動して開閉板２１が回動するため、閉じられていた送風ダクト２２が開口する。そして、送風ダクト２２が開口状態で引き出した操作レバー部２４ａを放すと、バネ２４ｂの付勢力により、回動軸２４の突出部２４ｃが保持板２２ａの端部に係止され、開閉板２１を「開」の状態に保持することができ、空気調整装置７からの空調風が、送風ホース１７、送風ダクト２２を介して、フロントガラス１８内面に当てられて、デフロストを行うこととなる。 When defrosting of the windshield 18 is required, the projecting portion 24c avoids the holding plate 22a and rotates the rotating shaft 24 clockwise while pulling the operation lever portion 24a to the side. Since the opening / closing plate 21 rotates in conjunction with the rotation of the rotation shaft 24, the closed air duct 22 is opened. Then, when the operation lever portion 24a pulled out with the air duct 22 opened is released, the projecting portion 24c of the rotating shaft 24 is locked to the end of the holding plate 22a by the urging force of the spring 24b, and the opening / closing plate 21 is moved. The air-conditioning air from the air conditioner 7 is applied to the inner surface of the windshield 18 through the blower hose 17 and the blower duct 22 to perform defrosting.

フロントガラス１８のデフロストが不要な時には、操作レバー部２４ａを引っ張った状態で反時計周りに回転させる。前記操作レバー部２４ａの回転に連動して開閉板２１が下方に回動し、送風ダクト２２の閉口部が閉じられる。そして、操作レバー部２４ａを放すと、バネ２４ｂの付勢力により、突出部２４ｃが保持板２２ａに係止される。これにより、送風ダクト２２を閉じてデフロストを行わない。 When defrosting of the windshield 18 is unnecessary, the winder 18 is rotated counterclockwise while the operation lever portion 24a is pulled. The opening / closing plate 21 rotates downward in conjunction with the rotation of the operation lever portion 24a, and the closing portion of the air duct 22 is closed. When the operation lever portion 24a is released, the protruding portion 24c is locked to the holding plate 22a by the urging force of the spring 24b. Thereby, the ventilation duct 22 is closed and defrosting is not performed.

次に、送風ダクト２２の第二実施例を説明する。なお、前記実施形態と共通する部分には同一の符号を付して、その説明は省略する。 Next, a second embodiment of the air duct 22 will be described. In addition, the same code | symbol is attached | subjected to the part which is common in the said embodiment, and the description is abbreviate | omitted.

図５、図６のように開閉板２１の一端は送風ダクト２２の前下部または後下部に蝶番２５により回転自在に枢支される。または、回動軸によって回転自在に枢支され、該送風ダクト２２内の回動軸上に開閉板２１の一端を溶接等で固設される。前記送風ダクト２２の両側面には、前記蝶番２５または、前記回動軸を中心とする円弧状の長孔２２ｄ・２２ｄが開口されている。前記開閉板２１の他端の両側部には固定ナット２１ａ・２１ａが溶接等で固定してあり、操作ボルト２２ｅ・２２ｅを送風ダクト２２の外から前記長孔２２ｄ・２２ｄを貫通して、締め付けることで、開閉板２１を固定することができる。 As shown in FIGS. 5 and 6, one end of the opening / closing plate 21 is pivotally supported by a hinge 25 at the front lower part or the rear lower part of the air duct 22. Alternatively, it is pivotally supported by a rotating shaft, and one end of the opening / closing plate 21 is fixed on the rotating shaft in the air duct 22 by welding or the like. On both side surfaces of the air duct 22, the hinge 25 or arc-shaped long holes 22d and 22d centering on the rotating shaft are opened. Fixing nuts 21 a and 21 a are fixed to both sides of the other end of the opening / closing plate 21 by welding or the like, and the operation bolts 22 e and 22 e are passed through the long holes 22 d and 22 d from the outside of the air duct 22 and tightened. Thus, the opening / closing plate 21 can be fixed.

こうして、フロントガラス１８のデフロストが必要な時には、デフロスタの操作ボルト２２ｅ・２２ｅを緩めて、送風ダクト２２の長孔２２ｄ・２２ｄに沿ってスライド移動させ、開閉板２１が十分開いた位置で操作ボルト２２ｅ・２２ｅを締めて開閉板２１を固定する。空気調整装置７を送風設定にすると空調風が、送風ダクト２２、デフロスタ用吐出部２０を介して、フロントガラス１８に広がり、デフロストを行うこととなる。 Thus, when defrosting of the windshield 18 is necessary, the operation bolts 22e and 22e of the defroster are loosened and slid along the long holes 22d and 22d of the air duct 22, and the operation bolt is in a position where the opening and closing plate 21 is sufficiently opened. The opening / closing plate 21 is fixed by tightening 22e and 22e. When the air conditioner 7 is set to air blowing, the conditioned air spreads through the windshield 18 and the defroster discharge part 20 to the windshield 18 and defrosts.

また、前記のように送風ダクト２２が開口している時には、送風ダクト２２の長孔２２ｄ・２２ｄからも空調風を吹き出すため、デフロストの風を広範囲に送風することが可能となる。 In addition, when the air duct 22 is opened as described above, the conditioned air is blown out from the long holes 22d and 22d of the air duct 22, so that the defrost air can be blown over a wide range.

フロントガラス１８のデフロストが不要な時には、デフロスタの操作ボルト２２ｅ・２２ｅを緩めて開閉板２１を送風ダクト２２の長孔２２ｄ・２２ｄのガイドにそって操作ボルト２２ｅ・２２ｅをスライド移動させ、開閉板２１が十分閉じた位置で操作ボルト２２ｅ・２２ｅを締めて開閉板２１を固定する。空気調整装置７の送風設定によらず、送風ダクト２２が閉口しているため、フロントガラス１８のデフロストは行わない。 When defrosting of the windshield 18 is not required, the operation bolts 22e and 22e of the defroster are loosened, the opening and closing plate 21 is slid along the guides of the long holes 22d and 22d of the air duct 22, and the opening and closing plate is moved. The operating bolts 22e and 22e are tightened at a position where the valve 21 is sufficiently closed to fix the opening / closing plate 21. Regardless of the air blowing setting of the air conditioner 7, the wind duct 22 is closed, so that the windshield 18 is not defrosted.

また、デフロスタの開閉板２１は任意の位置で固定可能であり、デフロストの強弱を開閉板２１の開閉度により調整することができる。 Further, the opening / closing plate 21 of the defroster can be fixed at an arbitrary position, and the strength of the defrost can be adjusted by the opening / closing degree of the opening / closing plate 21.

また、開閉板２１の固定ナット２１ａ・２１ａを固定ボルトとして送風ダクト２２の長孔２２ｄ・２２ｄに突出するように配設し、該開閉板の固定部材を操作ナットとすることも可能である。 Further, the fixing nuts 21a and 21a of the opening and closing plate 21 may be arranged as fixing bolts so as to protrude into the long holes 22d and 22d of the blower duct 22, and the fixing member of the opening and closing plate may be an operation nut.

以上のように、運転席９と、ステアリングハンドル８と、該運転席９とステアリングハンドル８を覆うキャビン６と、該キャビン６内の空気を調整する空気調整装置７を備えた作業車両に搭載され、前記空気調整装置７より延設される送風ホース１７と、ステアリングハンドル８の前方に配置されて調整後の空気を吐出する吐出部と、前記送風ホース１７と前記吐出部の間に介装される送風ダクト２２とを備え、前記空気調整装置７により調整した空気を、キャビン６の前面ガラス内側に吐出するようにしたデフロスタであって、該送風ダクト２２に送風路を開閉する開閉板２１と、該開閉板２１を開閉する手動操作手段を設けたものであるので、簡単な構造のデフロスタ開閉装置が実現できて、低コストでかつ省スペースで、十分な能力を有するデフロストとなる。そして、手動操作手段により開閉板２１を開閉操作して、容易にデフロストとして作用させたり、送風を停止させたりすることができる。 As described above, the vehicle is mounted on a work vehicle including the driver's seat 9, the steering handle 8, the cabin 6 that covers the driver's seat 9 and the steering handle 8, and the air adjusting device 7 that adjusts the air in the cabin 6. A blower hose 17 extending from the air conditioner 7, a discharge part disposed in front of the steering handle 8 and discharging adjusted air, and interposed between the blower hose 17 and the discharge part. A defroster that discharges the air adjusted by the air adjusting device 7 to the inside of the front glass of the cabin 6, and an opening / closing plate 21 that opens and closes the air passage in the air duct 22. Since a manual operation means for opening and closing the opening / closing plate 21 is provided, a defroster opening / closing device with a simple structure can be realized, and a sufficient capacity can be realized at low cost and in a small space. Made to defrost. Then, the opening / closing plate 21 is opened / closed by manual operation means, so that it can easily act as defrost or stop blowing.

前記開閉板２１の一端は送風ダクト２２に枢支した回動軸２４に固設され、前記回動軸２４の一端は送風ダクト２２より外側に突出して手動操作手段となる操作レバー部２４ａと連結され、該操作レバー部２４ａと送風ダクト２２との間に、開閉板２１を開位置と閉位置に保持する保持手段を設けたものであるので、簡単な構造のデフロスタ開閉装置が実現できて、開閉板開位置と閉位置で容易に保持させることができる。 One end of the opening / closing plate 21 is fixed to a rotating shaft 24 pivotally supported on the air duct 22, and one end of the rotating shaft 24 projects outward from the air duct 22 and is connected to an operation lever portion 24 a serving as a manual operation means. Since the holding means for holding the opening / closing plate 21 in the open position and the closed position is provided between the operation lever portion 24a and the air duct 22, a defroster opening / closing device with a simple structure can be realized, It can be easily held in the open / close plate open position and the closed position.

前記開閉板２１の一端は送風ダクト２２に回転自在に枢支した回動軸２４に固設され、前記送風ダクト２２の側面には、前記回動軸２４を中心とする円弧状の長孔が開口され、前記開閉板２１の他側の側部に、前記長孔を貫通して、開閉板２１と送風ダクト２２とを締付固定し、操作手段を兼ねる締結手段、を備えたものであるので、簡単な構造のデフロスタ開閉装置が実現できて、開閉板２１を任意の位置で固定することが可能となり、送風量を調節でき、また、開位置では長孔より側方へ送風することも可能となり、デフロスタの送風範囲の広範囲化となる。 One end of the opening / closing plate 21 is fixed to a rotating shaft 24 pivotally supported by the air duct 22, and an arc-shaped long hole centering on the rotating shaft 24 is formed on a side surface of the air duct 22. Opening is provided on the other side of the opening / closing plate 21 with fastening means that penetrates the elongated hole and fastens and fixes the opening / closing plate 21 and the air duct 22 and also serves as operating means. Therefore, a defroster opening / closing device with a simple structure can be realized, the opening / closing plate 21 can be fixed at an arbitrary position, the air flow rate can be adjusted, and air can be blown to the side from the long hole at the open position. It becomes possible, and the air blowing range of the defroster is widened.

本発明のデフロスタを装着した作業車両の全体側面図。1 is an overall side view of a work vehicle equipped with a defroster according to the present invention. 本発明のデフロスタを装着した作業車両のキャビン側面図。The cabin side view of the work vehicle equipped with the defroster of the present invention. （ａ）本発明のデフロスタの図で左正面図。（ｂ）同じく右正面図。(A) The left front view in the figure of the defroster of this invention. (B) Right front view. （ａ）本発明のデフロスタ側面図で閉時の図。（ｂ）同じく開時の図。(A) The figure at the time of closing with the defroster side view of this invention. (B) Similarly, when opened. 他の実施例のデフロスタの左正面図。The left front view of the defroster of another Example. （ａ）他の実施例のデフロスタ側面図で閉時の図。（ｂ）同じく開時の図。(A) The figure at the time of closing with the defroster side view of another Example. (B) Similarly, when opened.

２０デフロスタ用吐出部
２１開閉板
２２送風ダクト
２２ａ保持板
２４ａ操作レバー部
２４ｂバネ
２４ｃ突出部 20 Defroster discharge part 21 Opening and closing plate 22 Air duct 22a Holding plate 24a Operation lever part 24b Spring 24c Protruding part

Claims

The driver's seat (9), the steering handle (8), the cabin (6) covering the driver's seat (9) and the steering handle (8), and the air adjusting device (7) for adjusting the air in the cabin (6) ) Equipped with a defroster that discharges the air adjusted by the air conditioner (7) to the inside of the windshield (18) of the cabin (6), the air conditioner A blower hose (17) extending from the device (7), a defroster discharge part (20) disposed in front of the steering handle (8), the blower hose (17) and the defroster discharge part ( 20) and a blower duct (22) interposed between the two, and the blower duct (22) is substantially box-shaped, open upward and forward, and has a communication hole in the lower surface to open the blower hose (17). Connect, the top is It is released and connected to the defroster discharge part (20), the front front is opened, fixed to the front panel (19) on which the windshield (18) is arranged, and a ventilation path is formed inside in the vertical direction. The rotating shaft (24) is pivotally supported in the front lower part or the rear lower part of the air duct (22) so as to be rotatable in the left-right direction, and an opening / closing plate (on the rotating shaft (24) in the air duct (22)). 21) A defroster characterized in that one end of 21) is fixed and the opening and closing plate (21) is made of a rectangular plate material capable of sufficiently closing the opening provided on the lower surface of the air duct (22) .

2. The defroster according to claim 1, wherein one end of the rotating shaft (24) projects outward from the air duct (22) and is connected to an operation lever portion (24 a) serving as manual operation means, and the operation lever portion (24 a). A holding means for holding the open / close plate (21) in an open position and a closed position is provided between the air duct and the air duct (22), and the holding means is provided on the open / close plate (21) on the operation lever portion (24a) side. A spring (24b) is wound around the outer periphery of the rotating shaft (24) between the air duct and the inner surface of the air duct (22), and rotation is prevented on the rotating shaft (24) outside the air duct (22). The projecting portion (24c) is provided on the rotating shaft (24), and the projecting portion (24c) provided on the rotating shaft (24) is pressed against the side surface of the air duct (22) by the urging force of the spring (24b) so that the projecting portion can be engaged. Open position where the plate (21) is rotated upward and closed position where the plate (21) is rotated downward Defroster, characterized in that it has can be held in the location.

The defroster according to claim 1, wherein one end of the opening / closing plate (21) is fixed to a rotating part pivotally supported by the air duct (22), and the side surface of the air duct (22) An arc-shaped long hole (22d) centering on the moving shaft (24) is opened, and the other end of the opening / closing plate (21) penetrates the long hole to blow the opening / closing plate (21). A defroster characterized in that a fastening means is provided to fasten and fix the duct (22) and also serves as an operating means .