JP2017226321A - Working machine - Google Patents

Working machine Download PDF

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JP2017226321A
JP2017226321A JP2016123838A JP2016123838A JP2017226321A JP 2017226321 A JP2017226321 A JP 2017226321A JP 2016123838 A JP2016123838 A JP 2016123838A JP 2016123838 A JP2016123838 A JP 2016123838A JP 2017226321 A JP2017226321 A JP 2017226321A
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fuel tank
plate member
main fuel
engine
bonnet
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JP6647153B2 (en
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寛樹 福留
Hiroki Fukutome
寛樹 福留
晃宏 朝田
Akihiro Asada
朝田  晃宏
公孝 池邨
Kimitaka Ikemura
公孝 池邨
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Kubota Corp
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Kubota Corp
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Abstract

PROBLEM TO BE SOLVED: To provide a working machine which can securely support a sub fuel tank over a long time even if vibration occurs in a machine body while simplifying a sub fuel tank support structure.SOLUTION: A working machine includes: a main fuel tank supported while integrally held with a machine body; and a sub fuel tank 42 supported on the machine body through a support mechanism 41. The support mechanism 41 includes: a frame member 43 fixedly extending from a machine body frame; a receiving plate member 44 on which the sub fuel tank 42 is placed and supported and to which the sub fuel tank 42 is screwed; a lifting prevention band member 45 which presses the sub fuel tank 42 from above and is connected with the frame member 43 at both end parts; and vibration absorption members 43a, 43b which are provided at the frame member 43 and absorb vibration of the machine body.SELECTED DRAWING: Figure 7

Description

本発明は、主燃料タンクと副燃料タンクとを備えている作業車に関する。   The present invention relates to a work vehicle including a main fuel tank and a sub fuel tank.

従来では、主燃料タンクが機体側の固定部に支持され、副燃料タンクが、ボンネットの天板の下面側に略箱状の収納部材を介して支持される状態で配備されたものがあった(例えば、特許文献1参照)。   Conventionally, there has been a case where the main fuel tank is supported by the fixing part on the airframe side, and the sub fuel tank is provided on the lower surface side of the hood top plate via a substantially box-shaped storage member. (For example, refer to Patent Document 1).

実開昭59−180920号公報Japanese Utility Model Publication No.59-180920

上記従来構成は、ボンネットの内部において、空き領域となり易い上部空間を有効に利用して副燃料タンクを備えるようにしたものである。しかし、ボンネットは、エンジン等のメンテナンスのために手動で揺動開放可能に支持されるものであり、軽量化のために薄い板金材等を用いており、支持強度が充分ではない。   In the above-described conventional configuration, the auxiliary fuel tank is provided by effectively utilizing the upper space that tends to be an empty area inside the bonnet. However, the bonnet is supported so as to be manually swingable for maintenance of the engine or the like, and a thin sheet metal material or the like is used for weight reduction, and the support strength is not sufficient.

このように支持強度が充分ではないボンネットに副燃料タンクを支持する構成では、使用を継続するに伴って機体振動に起因して副燃料タンクの支持部分が破損するおそれがある等、耐久性の面で問題があり、このような不利を解消するための構成として、副燃料タンクを機体フレームに直接に支持させる構成が考えられた。例えば、副燃料タンクを水平方向並びに上下方向夫々に位置保持可能に副燃料タンク全体を囲う箱状の支持部を用いて、機体フレームに対して一体的に強固に取付ける構成である。しかし、このような構成では、支持構造が複雑になり、コスト高を招くとともに、取付け作業に手間がかかる不利もある。   In such a configuration in which the auxiliary fuel tank is supported on the bonnet having insufficient support strength, there is a possibility that the supporting portion of the auxiliary fuel tank may be damaged due to the vibration of the airframe as the use continues. As a configuration for eliminating such disadvantages, a configuration in which the auxiliary fuel tank is directly supported by the fuselage frame has been considered. For example, the auxiliary fuel tank is integrally and firmly attached to the body frame using a box-shaped support portion that surrounds the entire auxiliary fuel tank so that the auxiliary fuel tank can be held in the horizontal and vertical directions. However, with such a configuration, the support structure is complicated, resulting in high costs and a disadvantage in that it takes time and effort to install.

そこで、副燃料タンクの支持構造を簡素なものにしながら、機体に振動が発生しても長期にわたり良好に副燃料タンクを支持できるようにすることが望まれていた。   Accordingly, it has been desired to simplify the auxiliary fuel tank support structure and to support the auxiliary fuel tank well over a long period of time even if vibrations occur in the airframe.

本発明に係る作業車の特徴構成は、機体に対して一体的に保持された状態で支持される主燃料タンクと、
前記主燃料タンクに対して補助的に備えられ、且つ、機体に対して支持機構を介して支持される副燃料タンクとが備えられ、
前記支持機構が、
機体フレームから固定延設されたフレーム部材と、
前記副燃料タンクを載置支持するとともに、前記副燃料タンクがネジ止め固定される受け板部材と、
前記副燃料タンクを上方から押えるとともに、両側端部が前記フレーム部材に連結された浮き上がり防止用のバンド部材と、
前記フレーム部材に設けられて機体の振動を吸収する振動吸収部材とを備えている点にある。
The characteristic configuration of the work vehicle according to the present invention includes a main fuel tank supported in a state of being integrally held with respect to the airframe,
An auxiliary fuel tank provided as an auxiliary to the main fuel tank and supported through a support mechanism with respect to the airframe;
The support mechanism is
A frame member fixedly extended from the fuselage frame;
A receiving plate member for mounting and supporting the auxiliary fuel tank and to which the auxiliary fuel tank is fixed with screws;
A band member for preventing the lifting from the upper side while holding the auxiliary fuel tank from above and having both end portions connected to the frame member;
And a vibration absorbing member that is provided on the frame member and absorbs vibrations of the airframe.

本発明によれば、副燃料タンクは、受け板部材に載置支持されてネジ止め固定される。また、両側端部がフレーム部材に連結されたバンド部材によって副燃料タンクが上方から押えられて保持される。受け板部材はフレーム部材に載置されることになる。
受け板部材は副燃料タンクを載置支持するだけの簡素な構成であり、このような受け板部材とバンド部材という簡単な構造の支持機構により副燃料タンクを機体に支持させることができる。
According to the present invention, the auxiliary fuel tank is placed and supported on the receiving plate member and fixed with screws. Further, the auxiliary fuel tank is pressed and held from above by a band member having both end portions connected to the frame member. The receiving plate member is placed on the frame member.
The backing plate member has a simple configuration that only supports the auxiliary fuel tank, and the auxiliary fuel tank can be supported on the airframe by such a simple support mechanism of the backing plate member and the band member.

フレーム部材に振動を吸収する振動吸収部材が設けられるので、例えば、搭載されるエンジン等が発生する振動は、振動吸収部材によって吸収されて受け板部材に伝わり難くなる。その結果、副燃料タンクが受け板部材にネジ止め固定される箇所が振動に起因して外れてしまう等の不利を回避できる。尚、振動吸収部材としては、フレーム部材から受け板部材に向けて延び、相対的な微小変位を許容するような剛性の低い連結部材、あるいは、フレーム部材と受け板部材と間に介在する、例えばゴム等の弾性体等がある。   Since the vibration absorbing member that absorbs the vibration is provided in the frame member, for example, vibration generated by the mounted engine or the like is absorbed by the vibration absorbing member and hardly transmitted to the backing plate member. As a result, it is possible to avoid disadvantages such as the location where the auxiliary fuel tank is screwed and fixed to the receiving plate member due to vibration. The vibration absorbing member extends from the frame member toward the receiving plate member and has a low rigidity connecting member that allows relative minute displacement, or is interposed between the frame member and the receiving plate member. There are elastic bodies such as rubber.

従って、副燃料タンクの支持構造を簡素なものにしながら、機体に振動が発生しても長期にわたり良好に副燃料タンクを支持することが可能となった。   Therefore, it is possible to support the auxiliary fuel tank satisfactorily for a long period of time even if vibration occurs in the airframe while simplifying the supporting structure of the auxiliary fuel tank.

本発明においては、前記主燃料タンクと前記副燃料タンクとが機体横幅方向に並んで位置する状態で備えられ、
前記主燃料タンクの下部に設けられた供給口からエンジンに燃料を供給する主燃料供給路と、前記主燃料供給路の途中部に連通接続されて、前記副燃料タンクの下部に設けられた供給口から前記エンジンに燃料を供給する副燃料供給路と、前記副燃料供給路中に設けられ、前記副燃料タンクから前記エンジン側への燃料の流動を許容し、逆方向の流動を阻止する逆止弁とが備えられ、
前記主燃料供給路と前記副燃料供給路との接続箇所、前記主燃料供給路の前記供給口から前記接続箇所までの経路部分、及び、前記副燃料供給路の前記供給口から前記接続箇所までの経路部分の夫々が、前記主燃料タンク及び前記副燃料タンクの下端部と略同じ高さに設定されていると好適である。
In the present invention, the main fuel tank and the sub fuel tank are provided in a state of being aligned in the lateral width direction of the fuselage,
A main fuel supply passage for supplying fuel to the engine from a supply port provided at the lower portion of the main fuel tank, and a supply provided at the lower portion of the sub fuel tank connected to the middle portion of the main fuel supply passage. An auxiliary fuel supply passage for supplying fuel to the engine from the mouth, and a reverse passage that is provided in the auxiliary fuel supply passage, allows fuel flow from the auxiliary fuel tank to the engine side, and prevents reverse flow. With a stop valve,
Connection point between the main fuel supply path and the sub fuel supply path, a path part from the supply port of the main fuel supply path to the connection point, and from the supply port of the auxiliary fuel supply path to the connection point It is preferable that each of the path portions is set at substantially the same height as the lower ends of the main fuel tank and the sub fuel tank.

本構成によれば、主燃料タンクの下部の供給口から主燃料供給路における接続箇所までの経路部分を通してエンジンに燃料が供給される。一方、副燃料タンクの下部の供給口から副燃料供給路における接続箇所までの経路部分を通してエンジンに燃料が供給される。接続箇所と夫々の経路部分が、主燃料タンク及び副燃料タンクの下端部と略同じ高さに設定されているので、主燃料タンク及び副燃料タンクが燃料残量が少なくなっても、経路部分には燃料が残るので、空気が流入して燃料供給が滞る等の不利がなく、燃料供給を円滑に行える。又、燃料を補給する際には、副燃料供給路中に逆止弁が設けられるので、主燃料タンクに対して燃料を供給しても、副燃料タンク側に流入することがない。そこで、主燃料タンクに燃料が満量になるまで供給した後に、副燃料タンクに対しても燃料が満量になるまで供給することができる。   According to this configuration, the fuel is supplied to the engine through the path portion from the lower supply port of the main fuel tank to the connection location in the main fuel supply path. On the other hand, fuel is supplied to the engine through a path portion from the supply port at the lower part of the auxiliary fuel tank to the connection point in the auxiliary fuel supply path. Since the connection points and the respective route portions are set to substantially the same height as the lower ends of the main fuel tank and the auxiliary fuel tank, even if the remaining amount of fuel in the main fuel tank and the auxiliary fuel tank decreases, the route portion Since the fuel remains in the fuel, there is no disadvantage such as the inflow of air and the fuel supply stagnation, and the fuel supply can be performed smoothly. Further, when the fuel is replenished, a check valve is provided in the auxiliary fuel supply passage, so that even if fuel is supplied to the main fuel tank, it does not flow into the auxiliary fuel tank side. Therefore, after the fuel is supplied to the main fuel tank until it is full, the sub fuel tank can also be supplied until the fuel is full.

本発明においては、機体が、エンジンと、前記エンジンの後部に連結されたクラッチハウジングと、前記クラッチハウジングの後部に連なるミッションケースとを備え、
前記主燃料供給路の前記供給口から前記接続箇所までの経路部分、及び、前記副燃料供給路の前記供給口から前記接続箇所までの経路部分の夫々が、前記クラッチハウジングの下側に位置する状態で備えられていると好適である。
In the present invention, the fuselage includes an engine, a clutch housing connected to the rear part of the engine, and a transmission case connected to the rear part of the clutch housing,
A path portion from the supply port to the connection location of the main fuel supply path and a path portion from the supply port to the connection location of the sub fuel supply path are located below the clutch housing. It is suitable if it is provided in a state.

本構成によれば、主燃料タンク及び副燃料タンク夫々におけるエンジンに対する燃料供給が行われる経路部分が、クラッチハウジングの下側の領域を利用して車体の低い箇所に備えられる。主燃料タンクと副燃料タンクはクラッチハウジングの左右両側の空き領域を利用して、重量バランスのよい状態で車体の左右両側に振り分け配備することができる。   According to this configuration, a path portion in which fuel is supplied to the engine in each of the main fuel tank and the sub fuel tank is provided at a low portion of the vehicle body using the lower region of the clutch housing. The main fuel tank and the sub fuel tank can be distributed and arranged on the left and right sides of the vehicle body in a well-balanced state by using the empty areas on the left and right sides of the clutch housing.

本発明においては、機体前部に備えられたボンネットの内部に、エンジンと、前記エンジンからの排気を前記ボンネットの側壁部の下部を通して外方に案内する排気管とが備えられ、
前記ボンネットの側壁部の下端部に前記排気管との間の隙間を確保するために凹入する切欠部が形成され、
前記排気管における前記ボンネットの側壁部よりも外方に露出する部位の外方側を覆う遮熱カバーが備えられ、
前記遮熱カバーに、前記ボンネットの前記切欠部の横側外方を覆う縦向き延設部が備えられていると好適である。
In the present invention, an engine and an exhaust pipe for guiding the exhaust from the engine to the outside through the lower part of the side wall of the bonnet are provided inside the bonnet provided at the front part of the airframe,
A notch that is recessed to form a clearance between the exhaust pipe and the lower end of the side wall of the bonnet is formed,
A heat-insulating cover that covers an outer side of a portion of the exhaust pipe that is exposed outward from a side wall portion of the bonnet;
It is preferable that the heat shield cover is provided with a vertically extending portion that covers a lateral outer side of the notch portion of the bonnet.

本構成によれば、排気管が、ボンネットの内部からボンネットの側壁部の下部を通して外方に露出するように延設されている。ボンネットの側壁部の下端部には、切欠部が形成されて、ボンネットの下端部と排気管との間に隙間が確保されており、ボンネットが排気管の熱による影響を受け難い。   According to this configuration, the exhaust pipe is extended from the inside of the bonnet so as to be exposed to the outside through the lower part of the side wall of the bonnet. A notch is formed at the lower end of the side wall of the bonnet, and a gap is secured between the lower end of the bonnet and the exhaust pipe, so that the bonnet is hardly affected by the heat of the exhaust pipe.

排気管におけるボンネットよりも外方に露出する部位が遮熱カバーにより覆われるので、排気管の熱が遮熱カバーによって遮られて外方に放出されることを防止できる。ボンネットは、エンジン周りのメンテナンスのために大きく開放操作可能に設けられるものである。そして、ボンネットを開閉操作させるときに、ボンネットの側壁部の下端部に切欠部が形成されていると、その切欠部に手を引っ掛けて開閉操作させようとすることが考えられる。本構成では、遮熱カバーに切欠部の横側外方を覆う縦向き延設部が備えられるので、ボンネットの開閉させるために切欠部の下方に手を差し入れることはできない。その結果、排気管の影響により高温になっている切欠部に誤って手で触ることを未然に防止できる。   Since the portion of the exhaust pipe that is exposed outward from the bonnet is covered with the heat shield cover, the heat of the exhaust pipe can be prevented from being released by being shielded by the heat shield cover. The bonnet is provided so that it can be largely opened for maintenance around the engine. When the bonnet is opened and closed, if a notch is formed at the lower end of the side wall of the bonnet, it is conceivable that the user tries to open and close the bonnet by hooking his hand. In this configuration, since the heat shield cover is provided with a vertically extending portion that covers the lateral outer side of the notch, a hand cannot be inserted below the notch in order to open and close the bonnet. As a result, it is possible to prevent accidental touching of the cutout portion, which has become hot due to the influence of the exhaust pipe.

本発明においては、機体の運転部の上方を覆うキャビンが備えられ、
前記キャビンの天井部は、上部外方側に位置する第一板部材と、下部内方側に位置する第二板部材とを備え、且つ、前記第一板部材と前記第二板部材との間に内部空間を形成する状態で、前記第一板部材と前記第二板部材の外周部同士が接続され、
前記第一板部材及び前記第二板部材夫々の外周部は、所定幅にわたって前記第一板部材及び前記第二板部材の板面同士が接続され、
前記第一板部材は、前記第二板部材の外周部に接続される連結用板面部分と、前記第二板部材の外端面を覆う外端側覆い部分とが一連に連なる状態で設けられていると好適である。
In the present invention, a cabin that covers the upper part of the operating part of the fuselage is provided,
The ceiling portion of the cabin includes a first plate member located on the upper outer side and a second plate member located on the lower inner side, and the first plate member and the second plate member In the state of forming an internal space between the outer peripheral portions of the first plate member and the second plate member are connected,
The outer peripheral portion of each of the first plate member and the second plate member is connected to the plate surfaces of the first plate member and the second plate member over a predetermined width,
The first plate member is provided in a state in which a connecting plate surface portion connected to the outer peripheral portion of the second plate member and an outer end side covering portion covering the outer end surface of the second plate member are continuously connected. It is preferable that

本構成によれば、キャビンの天井部が上下中間部に内部空間を形成する状態で上下2枚の板部材にて構成されるので、軽量でありながら強度が大きく且つ断熱効果も高いものになる。しかも、天井部における第一板部材及び第二板部材夫々の外周部は、所定幅にわたって第一板部材及び第二板部材の板面同士が接続され、第一板部材は、第二板部材の外周部に接続される連結用板面部分と、第二板部材の外端面を覆う外端側覆い部分とが一連に連なる状態で設けられている。   According to this configuration, the cabin ceiling portion is composed of two upper and lower plate members in a state in which an internal space is formed in the upper and lower intermediate portions, so that the strength is high and the heat insulation effect is high while being lightweight. . Moreover, the outer peripheral portions of the first plate member and the second plate member in the ceiling are connected to each other between the plate surfaces of the first plate member and the second plate member over a predetermined width, and the first plate member is the second plate member. The connecting plate surface portion connected to the outer peripheral portion and the outer end side covering portion that covers the outer end surface of the second plate member are provided in a series.

すなわち、第一板部材及び第二板部材とが所定幅にわたって板面同士が接続されるので接続強度が大きくなり、第一板部材は、第二板部材の外周部に接続される連結用板面部分から一連に連なる状態で第二板部材の外端面を覆う外端側覆い部分を備えるので、第一板部材と第二板部材との合わせ面部分のうち外方に臨む箇所が下向き状態となるので、雨水等が合わせ面部分から侵入するおそれが少ない。   That is, since the plate surfaces of the first plate member and the second plate member are connected to each other over a predetermined width, the connection strength is increased, and the first plate member is connected to the outer peripheral portion of the second plate member. Since the outer end side covering portion that covers the outer end surface of the second plate member in a state of being continuously connected from the surface portion is provided, the portion facing the outside of the mating surface portion of the first plate member and the second plate member is in the downward state Therefore, there is little possibility that rainwater or the like enters from the mating surface portion.

従って、水分の侵入による損傷のおそれが少なく、かつ、第一板部材と第二板部材との間での接続強度も大きくなり、キャビンの耐久性が向上する。   Therefore, there is little risk of damage due to moisture intrusion, and the connection strength between the first plate member and the second plate member is increased, and the durability of the cabin is improved.

トラクタの全体側面図である。It is the whole tractor side view. キャビン天井部の斜視図である。It is a perspective view of a cabin ceiling part. キャビン天井部の接合部の断面図である。It is sectional drawing of the junction part of a cabin ceiling part. 遮熱カバーの取付け状態を示す分解斜視図である。It is a disassembled perspective view which shows the attachment state of a heat shield cover. 遮熱カバーの取付け状態を示す斜視図である。It is a perspective view which shows the attachment state of a heat shield cover. 副燃料タンク配設部の斜視図である。It is a perspective view of a sub fuel tank arrangement part. 副燃料タンク配設部の分解斜視図である。It is a disassembled perspective view of an auxiliary fuel tank arrangement part. 燃料タンクの接続状態を示す図である。It is a figure which shows the connection state of a fuel tank. 連通管の支持構造を示す分解斜視図である。It is a disassembled perspective view which shows the support structure of a communicating pipe. 連通管の支持構造を示す斜視図である。It is a perspective view which shows the support structure of a communicating pipe.

以下、本発明に係る作業車の実施形態を作業車の一例としてのトラクタに適用した場合について図面に基づいて説明する。   Hereinafter, a case where an embodiment of a work vehicle according to the present invention is applied to a tractor as an example of a work vehicle will be described with reference to the drawings.

〔全体構成〕
図1に示すように、トラクタは、左右一対の操向操作及び駆動自在な前輪1と左右一対の駆動自在な後輪2とを有する走行機体3を備えて四輪駆動式に構成されている。走行機体3の前部にボンネット4が備えられ、ボンネット4の内部にエンジン5及びそれに付随する各種の吸排気用の装置が備えられる。走行機体3の後部に、運転部6が備えられ、運転部6は、外方側がキャビン7にて覆われている。
〔overall structure〕
As shown in FIG. 1, the tractor includes a traveling machine body 3 having a pair of left and right steering operations and a front wheel 1 that can be driven and a pair of left and right driveable rear wheels 2, and is configured as a four-wheel drive type. . A bonnet 4 is provided at the front of the traveling machine body 3, and an engine 5 and various intake and exhaust devices associated therewith are provided inside the bonnet 4. A driving unit 6 is provided at the rear of the traveling machine body 3, and the driving unit 6 is covered with a cabin 7 on the outer side.

エンジン5の下部から前方に前フレーム8が延出されており、この前フレーム8に前輪1を装着する車軸ケース(図示省略)等が支持されている。エンジン5の後部に一体的にクラッチハウジング9が連結されており、このクラッチハウジング9の後部にミッションケース10が連結されている。エンジン5、クラッチハウジング9、ミッションケース10が一体的に連結されて機体全体を支持する機体フレームFを構成している。   A front frame 8 extends forward from the lower part of the engine 5, and an axle case (not shown) on which the front wheel 1 is mounted is supported on the front frame 8. A clutch housing 9 is integrally connected to the rear portion of the engine 5, and a transmission case 10 is connected to the rear portion of the clutch housing 9. The engine 5, the clutch housing 9, and the transmission case 10 are integrally connected to constitute a body frame F that supports the entire body.

ミッションケース10の後部には、ロータリ耕耘装置やプラウなどの作業装置(図示せず)を昇降操作可能に連結するリンク機構11、リンク機構11を上下方向に揺動駆動する油圧式のリフトシリンダ12、及び、作業装置に対する動力伝達用の動力取り出し軸13などが備えられている。   At the rear of the mission case 10 are a link mechanism 11 for connecting a working device (not shown) such as a rotary tiller or a plow so that it can be moved up and down, and a hydraulic lift cylinder 12 that drives the link mechanism 11 to swing up and down. , And a power take-out shaft 13 for power transmission to the working device.

エンジン5の動力が、クラッチハウジング9及びミッションケース10に内装された図示しない伝動機構を介して前輪1及び後輪2に伝達されるとともに、伝動機構を介して動力取り出し軸13に伝達されるように構成されている。   The power of the engine 5 is transmitted to the front wheels 1 and the rear wheels 2 through a transmission mechanism (not shown) housed in the clutch housing 9 and the transmission case 10 and to the power take-out shaft 13 through the transmission mechanism. It is configured.

運転部6には、左右一対のリヤフェンダ14の間に運転者が着座する運転座席15が備えられ、運転座席15の前部側に、運転者が搭乗する平板状の搭乗ステップ16、前輪操舵用のステアリングホイール17及び他の各種の操作具等を有する運転操作部18等が備えられている。   The driver 6 is provided with a driver seat 15 on which a driver sits between a pair of left and right rear fenders 14. A flat boarding step 16 on which the driver gets on the front side of the driver seat 15 is used for front wheel steering. The steering wheel 17 and a driving operation unit 18 having various other operation tools are provided.

〔キャビン〕
キャビン7は、全体が枠状のキャビンフレーム19にて支持され、前面、左右側面、及び、後面が、夫々、ガラス板にて覆われ、天井部20は板状の部材にて覆われており、キャビン7全体が運転部6の上方を覆う略箱状の居住空間を形成している。
〔cabin〕
The cabin 7 is entirely supported by a frame-like cabin frame 19, and the front surface, the left and right side surfaces, and the rear surface are each covered with a glass plate, and the ceiling portion 20 is covered with a plate-like member. The cabin 7 as a whole forms a substantially box-shaped living space that covers the upper part of the operating unit 6.

図2に示すように、キャビン7の天井部20は、上部外方側に位置する第一板部材21と、下部内方側に位置する第二板部材22とを備え、且つ、第一板部材21と第二板部材22との間に内部空間を形成する状態で、第一板部材21と第二板部材22の外周部同士が接続されている。このように構成することで、軽量でありながら充分な支持強度を有するものとなる。又、第一板部材21と第二板部材22との間に形成される内部空間は、例えば、空調用の空気流動路として機能させる等、有効利用を図ることができる。   As shown in FIG. 2, the ceiling portion 20 of the cabin 7 includes a first plate member 21 located on the upper outer side and a second plate member 22 located on the lower inner side, and the first plate In a state where an internal space is formed between the member 21 and the second plate member 22, the outer peripheral portions of the first plate member 21 and the second plate member 22 are connected to each other. By comprising in this way, it will have sufficient support strength, though it is lightweight. Further, the internal space formed between the first plate member 21 and the second plate member 22 can be effectively used, for example, by functioning as an air flow path for air conditioning.

第一板部材21及び第二板部材22夫々の外周部は、所定幅にわたって第一板部材21及び第二板部材22の板面同士が接続されている。2枚の板材の端面同士を突き合わせて接続するのではなく、図3に示すように、第二板部材22の外周部の連結用板面部分22aと第一板部材21の外周部の連結用板面部分21aとが接着剤にて貼り合わせて接続される。しかも、第一板部材21は、前記連結用板面部分21aと第二板部材22の外端面22bを覆う外端側覆い部分21bとが一連に連なる状態で設けられている。つまり、上部外方側に位置する第一板部材21は、外周部の断面形状が略L字に形成され、第二板部材22の外端面22bを覆うように設けられる。第一板部材21と第二板部材22との合わせ面23のうち外方に臨む箇所が下向き状態となるように、第一板部材21と第二板部材22とが接続される。その結果、雨水が合わせ面23から侵入することを回避し易いものになる。   The outer peripheral portions of the first plate member 21 and the second plate member 22 are connected to the plate surfaces of the first plate member 21 and the second plate member 22 over a predetermined width. Rather than abutting and connecting the end surfaces of the two plate members, as shown in FIG. 3, the connecting plate surface portion 22 a of the outer peripheral portion of the second plate member 22 and the outer peripheral portion of the first plate member 21 are connected. The plate surface portion 21a is bonded and connected with an adhesive. In addition, the first plate member 21 is provided in a state where the connecting plate surface portion 21a and the outer end side covering portion 21b covering the outer end surface 22b of the second plate member 22 are connected in series. That is, the first plate member 21 positioned on the upper outer side is provided so that the outer peripheral surface 22b of the second plate member 22 is covered with a substantially L-shaped outer peripheral section. The 1st board member 21 and the 2nd board member 22 are connected so that the location which faces outward among the mating surfaces 23 of the 1st board member 21 and the 2nd board member 22 may be in a downward state. As a result, it becomes easy to avoid rainwater entering from the mating surface 23.

〔排気構造〕
ボンネット4の内部に、エンジン5の排気(燃焼排ガス)をボンネット4の側壁部4Aの下部を通して外方に案内する排気管24が備えられている。図4に示すように、ボンネット4の側壁部4Aの下端部に排気管24との間の隙間を確保するために凹入する切欠部25が形成されている。排気管24は、この切欠部25の下方を通してボンネット4の内部からボンネット4の外部に向けて延設されている。ボンネット4の外側に延設された排気管24は、上下向き姿勢になるように略円弧状に曲げられ、さらに、ボンネット4の上部よりも高い位置まで上方に向けて延設されている。
[Exhaust structure]
Inside the bonnet 4, an exhaust pipe 24 that guides the exhaust (combustion exhaust gas) of the engine 5 outward through the lower part of the side wall portion 4 </ b> A of the bonnet 4 is provided. As shown in FIG. 4, a notch 25 is formed in the lower end portion of the side wall portion 4 </ b> A of the bonnet 4 so as to be recessed in order to ensure a gap with the exhaust pipe 24. The exhaust pipe 24 extends from the inside of the bonnet 4 toward the outside of the bonnet 4 through the lower part of the notch 25. The exhaust pipe 24 extended to the outside of the bonnet 4 is bent in a substantially arc shape so as to have a vertically oriented posture, and further extended upward to a position higher than the upper portion of the bonnet 4.

排気管24の周囲には、ボンネット4の切欠部25の下方を通して外方へ延設される箇所から上向き延設部24Aの上下途中位置にわたって排気管24の外周部を覆う筒状カバー26が備えられている。筒状カバー26は、排気管24よりも大径に形成され、外周に多数の通気孔27が形成されている。図1に示すように、排気管24の上部は筒状カバー26の上端部から上方に突出して、上端部に排気口28が形成されている。筒状カバー26は図示しないブラケットにより排気管24に適宜箇所が支持されている。筒状カバー26を設けることにより、高温の排気管24が外方に露出して作業者が接触するおそれが少なくなるようにしている。   Around the exhaust pipe 24, there is provided a cylindrical cover 26 that covers the outer peripheral portion of the exhaust pipe 24 from a position extending outwardly through the lower part of the notch 25 of the bonnet 4 to an upper and lower halfway position of the upwardly extending part 24 </ b> A. It has been. The cylindrical cover 26 is formed to have a larger diameter than the exhaust pipe 24, and a large number of vent holes 27 are formed on the outer periphery. As shown in FIG. 1, the upper part of the exhaust pipe 24 protrudes upward from the upper end part of the cylindrical cover 26, and the exhaust port 28 is formed in the upper end part. The cylindrical cover 26 is appropriately supported at the exhaust pipe 24 by a bracket (not shown). By providing the cylindrical cover 26, the possibility that the high-temperature exhaust pipe 24 is exposed to the outside and the operator contacts is reduced.

そして、排気管24におけるボンネット4の側壁部4Aよりも外方に露出する部位の外方側を覆う遮熱カバー29が備えられている。説明を加えると、図4,5に示すように、遮熱カバー29は、排気管24のうち、ボンネット4の側壁部4Aに形成された切欠部25の下方を通して側壁部4Aの外方に向けて延設される箇所であって且つ筒状カバー26によって覆われていない一部露出箇所24aを外方側から覆うように設けられている。   And the heat insulation cover 29 which covers the outer side of the site | part exposed outside rather than the side wall part 4A of the bonnet 4 in the exhaust pipe 24 is provided. In addition, as shown in FIGS. 4 and 5, the heat shield cover 29 is directed to the outside of the side wall 4 </ b> A through the exhaust pipe 24 below the notch 25 formed in the side wall 4 </ b> A of the bonnet 4. It is provided so that the partially exposed location 24a which is the location extended and is not covered with the cylindrical cover 26 may be covered from an outer side.

遮熱カバー29は、一部露出箇所24aを外方側から覆うカバー本体30と、カバー本体30の上部に取り付けられてボンネット4の切欠部25の横側外方を覆う切欠部カバー体31とを備えている。   The heat shield cover 29 includes a cover main body 30 that covers a part of the exposed portion 24 a from the outside, a cutout cover body 31 that is attached to the top of the cover main body 30 and covers the lateral outer side of the cutout 25 of the bonnet 4, It has.

図4に示すように、カバー本体30は、板体を屈曲形成して構成されており、排気管24における一部露出箇所24aの横側外方側を覆う縦向き姿勢の縦面部30aと、その縦面部30aの上端部に連なる状態で設けられて前記一部露出箇所24aの上方側を覆う水平姿勢の上面部30bと、縦面部30aの下端部に連なる状態で設けられて前記一部露出箇所24aの下方側を覆う水平姿勢の下面部30cと、下面部の機方向内方側端部に連なる状態で縦向き姿勢にて設けられた機体連結部30dとを備えている。   As shown in FIG. 4, the cover main body 30 is formed by bending a plate body, and a vertical surface portion 30 a in a vertical posture covering the lateral outer side of the partially exposed portion 24 a in the exhaust pipe 24, The upper surface portion 30b is provided in a state of being connected to the upper end portion of the vertical surface portion 30a and covers the upper side of the partially exposed portion 24a, and the partial exposure is provided in a state of being connected to the lower end portion of the vertical surface portion 30a. The lower surface part 30c of the horizontal attitude | position which covers the downward side of the location 24a, and the body connection part 30d provided in the vertical attitude | position in the state connected to the machine direction inner side edge part of a lower surface part are provided.

カバー本体30は、機体フレームFとしてのクラッチハウジング9から固定延設された支持部材32にボルト連結にて一体的に固定されて支持されている。支持部材32の延出側端に上下方向に延びる縦向き支持部32Aが設けられている。縦向き支持部32Aの下端部にカバー本体30の機体連結部30dが2本のボルト34によって連結して固定されている。又、この縦向き支持部32Aの上端部には、排気管24における一部露出箇所24aが連結されている。つまり、排気管24の一部露出箇所24aに連結用ブラケット35が一体的に取付けられており、この連結用ブラケット35に対して縦向き支持部32Aの上端部が2本のボルト34により連結されている。   The cover body 30 is integrally fixed and supported by a bolt connection to a support member 32 that is fixedly extended from the clutch housing 9 as the body frame F. A vertical support portion 32 </ b> A extending in the vertical direction is provided at the extending side end of the support member 32. The machine body connecting portion 30d of the cover main body 30 is connected and fixed to the lower end portion of the vertically supporting portion 32A by two bolts 34. A partially exposed portion 24a in the exhaust pipe 24 is connected to the upper end portion of the vertical support portion 32A. That is, the connecting bracket 35 is integrally attached to the partially exposed portion 24 a of the exhaust pipe 24, and the upper end portion of the vertical support portion 32 </ b> A is connected to the connecting bracket 35 by the two bolts 34. ing.

縦向き支持部32Aから横側外方に向けて一体的に前後方向視で略L字形の延長支持部32Bが延設されている。延長支持部32Bの延出側端部にカバー本体30の縦面部30aが1本のボルト34によって連結して固定されている。従って、カバー本体30は、3本のボルト34によって支持部材32に連結して固定されている。   A substantially L-shaped extension support portion 32B is integrally extended from the vertical support portion 32A outward in the lateral direction as viewed in the front-rear direction. The vertical surface portion 30a of the cover main body 30 is connected and fixed to one end of the extension support portion 32B by a single bolt 34. Therefore, the cover main body 30 is connected and fixed to the support member 32 by the three bolts 34.

切欠部カバー体31は、水平姿勢の取付部31Aと、縦向き姿勢の縦向き延設部31Bとを備えて、前後方向視で略L字形の板状体にて構成されている。取付部31Aは、カバー本体30の上面部30bに載置された状態で2本のボルト36によって固定されている。取付部31A側のボルト挿通孔38は機体左右方向に沿って長い長孔に形成されている。ボルト36の締結を解除すると、切欠部カバー体31を機体横方向に移動させることができ、ボルト36を締結すると、切欠部カバー体31を位置固定することができる。すなわち、切欠部カバー体31をボルト挿通孔38の範囲内で横方向に位置変更可能に構成されている。   The cutout cover body 31 includes a horizontal mounting portion 31 </ b> A and a vertical extending portion 31 </ b> B in a vertical orientation, and is configured as a substantially L-shaped plate-like body in the front-rear direction view. The attachment portion 31 </ b> A is fixed by two bolts 36 in a state of being placed on the upper surface portion 30 b of the cover main body 30. The bolt insertion hole 38 on the attachment portion 31A side is formed as a long long hole along the left-right direction of the machine body. When the fastening of the bolt 36 is released, the cutout cover body 31 can be moved in the lateral direction of the machine body, and when the bolt 36 is fastened, the position of the cutout cover body 31 can be fixed. That is, the position of the cutout cover body 31 can be changed in the lateral direction within the range of the bolt insertion hole 38.

切欠部カバー体31の縦向き延設部31Bには、複数の通気用のスリット37が形成されている。複数のスリット37は、例えば、ボンネット4を開閉させるとき等に、作業者の手指が入り込まないように、人間の手指の幅よりも小さい幅に形成されている。   A plurality of slits 37 for ventilation are formed in the vertically extending portion 31 </ b> B of the cutout cover body 31. The plurality of slits 37 are formed with a width smaller than the width of human fingers so that the fingers of the operator do not enter when the bonnet 4 is opened and closed, for example.

この構成により、切欠部カバー体31を位置調節することで、作業者が手を差し込むことがないように、切欠部カバー体31とボンネット4の側壁部4Aとの間の間隔を適切な値に調整することができる。又、切欠部25を覆うようにしながら、風の流れを妨げてエンジン5の冷却効果を悪化させることがないようにしている。   With this configuration, by adjusting the position of the notch cover body 31, the interval between the notch cover body 31 and the side wall 4A of the bonnet 4 is set to an appropriate value so that the operator does not insert his / her hand. Can be adjusted. Further, while covering the notch 25, the flow of the wind is not hindered so that the cooling effect of the engine 5 is not deteriorated.

(燃料タンク支持構造)
エンジン5に供給する燃料を貯留する燃料タンクとして、機体に対して一体的に支持される主燃料タンク40と、主燃料タンク40に対して補助的に備えられ、且つ、機体に対して支持機構41を介して支持される副燃料タンク42とが備えられている。主燃料タンク40及び副燃料タンク42は、例えば、樹脂製のブロー成形品にて構成される。
(Fuel tank support structure)
As a fuel tank for storing fuel to be supplied to the engine 5, a main fuel tank 40 that is integrally supported with respect to the fuselage, and a support mechanism that is provided to the main fuel tank 40 and that is auxiliary to the fuselage. An auxiliary fuel tank 42 supported via 41 is provided. The main fuel tank 40 and the sub fuel tank 42 are constituted by, for example, a resin blow molded product.

主燃料タンク40と副燃料タンク42とは機体横幅方向に並んで位置する状態で備えられている。すなわち、図8に示すように、主燃料タンク40がクラッチハウジング9の機体左側に位置し、副燃料タンク42がクラッチハウジング9の機体右側に位置する状態で、左右両側に振り分け配備されている。主燃料タンク40及び副燃料タンク42は、夫々、クラッチハウジング9の左右両側箇所であって且つ搭乗ステップ16の下方側の空間を利用して配備されている。   The main fuel tank 40 and the auxiliary fuel tank 42 are provided in a state of being arranged side by side in the body width direction. That is, as shown in FIG. 8, the main fuel tank 40 is disposed on the left side of the body of the clutch housing 9, and the sub fuel tank 42 is disposed on the left and right sides in a state of being positioned on the right side of the body of the clutch housing 9. The main fuel tank 40 and the sub fuel tank 42 are respectively arranged on the left and right sides of the clutch housing 9 and using the space below the boarding step 16.

主燃料タンク40は、トラクタに標準的に装備されるものであって、固定状態で車体に取り付けられる構成となっている。主燃料タンク40の支持構造については、詳述はしないが、機体フレームFとしてのクラッチハウジング9に対して、前後方向、左右方向、及び、上下方向の移動が阻止された状態で安定的に支持されている。又、図示していないが、主燃料タンク40には専用の給油口が形成されている。   The main fuel tank 40 is equipped as standard on the tractor, and is configured to be attached to the vehicle body in a fixed state. Although the support structure of the main fuel tank 40 will not be described in detail, the clutch housing 9 as the fuselage frame F is stably supported in a state where movement in the front-rear direction, the left-right direction, and the up-down direction is prevented. Has been. Although not shown, the main fuel tank 40 has a dedicated fuel filler opening.

一方、副燃料タンク42は、トラクタにオプションとして付加的に装備されるものであり、後付けで車体に取り付けられる場合がある。そこで、副燃料タンク42を支持する支持機構41は簡易な構成となっている。   On the other hand, the auxiliary fuel tank 42 is additionally provided as an option to the tractor and may be attached to the vehicle body as a retrofit. Therefore, the support mechanism 41 that supports the auxiliary fuel tank 42 has a simple configuration.

図6,7に示すように、副燃料タンク42を支持する支持機構41は、機体フレームFから固定延設されたフレーム部材43と、副燃料タンク42を載置支持するとともに、副燃料タンク42がネジ止め固定される受け板部材44と、副燃料タンク42を上方から押えるとともに、両側端部がフレーム部材43に連結された浮き上がり防止用のバンド部材45とを備えている。   As shown in FIGS. 6 and 7, the support mechanism 41 that supports the auxiliary fuel tank 42 mounts and supports the frame member 43 that is fixedly extended from the body frame F, the auxiliary fuel tank 42, and the auxiliary fuel tank 42. Is provided with a receiving plate member 44 that is fixed with screws, and a band member 45 for holding the auxiliary fuel tank 42 from above and for preventing lifting from both ends connected to the frame member 43.

副燃料タンク42は平面視で略矩形状に設けられ、底面が受け板部材44にて載置された状態で支持されている。副燃料タンク42の機体後部側箇所の上面に給油口46が形成されている。給油口46は通常は蓋体47にて閉塞されている。給油口46は、平面視で搭乗ステップ16から外れた箇所に位置しており、搭乗ステップ16により邪魔されることなく、給油を行うことができる。副燃料タンク42の機体前部左側箇所の下部には、エンジン5に対して燃料を供給するための供給口48が形成されている。   The auxiliary fuel tank 42 is provided in a substantially rectangular shape in plan view, and is supported in a state where the bottom surface is placed on the receiving plate member 44. A refueling port 46 is formed on the upper surface of the rear side portion of the auxiliary fuel tank 42. The fuel filler 46 is normally closed by a lid 47. The refueling port 46 is located at a position deviated from the boarding step 16 in plan view, and can be refueled without being obstructed by the boarding step 16. A supply port 48 for supplying fuel to the engine 5 is formed at the lower part of the left side portion of the front portion of the sub fuel tank 42.

説明を加えると、機体フレームFとしてのクラッチハウジング9から横外側方に向けて前後方向に幅狭のフレーム部材43が延設されている。このフレーム部材43の上部側に受け板部材44が載置支持されている。図7に示すように、フレーム部材43の左右方向途中部から機体前方に向けて幅狭の前部側支持アーム43aが片持ち状に延設されている。又、フレーム部材43の左右方向途中部であって前部側支持アーム43aよりも横外側方側箇所から機体後方に向けて幅狭の後部側支持アーム43bが片持ち状に延設されている。   In other words, a frame member 43 having a narrow width in the front-rear direction is extended from the clutch housing 9 as the body frame F toward the laterally outer side. A receiving plate member 44 is placed and supported on the upper side of the frame member 43. As shown in FIG. 7, a narrow front support arm 43 a is extended in a cantilevered manner from the middle in the left-right direction of the frame member 43 toward the front of the machine body. Further, a rear-side support arm 43b having a narrow width extends in a cantilevered manner from the laterally outer side of the frame member 43 in the left-right direction and toward the rear of the machine body from the front-side support arm 43a. .

副燃料タンク42は、底面の適宜箇所に分散させた状態で複数のインサートナット(図示せず)を備えており、受け板部材44に備えられた取付部44aに対して複数のインサートナットに対してボルトを装着して、受け板部材44と一体化させた状態で載置支持されている。又、副燃料タンク42の前後中央部付近にて、横方向に沿って延びるバンド部材45が備えられ、バンド部材45の両側端部がボルト・ナットの締結によりフレーム部材43に固定されている。   The auxiliary fuel tank 42 is provided with a plurality of insert nuts (not shown) in a state of being dispersed at appropriate locations on the bottom surface, and with respect to the plurality of insert nuts with respect to the mounting portion 44a provided on the backing plate member 44. Are mounted and supported in a state of being integrated with the receiving plate member 44. In addition, a band member 45 extending in the lateral direction is provided in the vicinity of the front and rear center portion of the auxiliary fuel tank 42, and both end portions of the band member 45 are fixed to the frame member 43 by fastening bolts and nuts.

受け板部材44は、フレーム部材43の上部に載置支持されるとともに、前後両側の支持アーム43a,43bの延出端部の連結部43a1,43b1に、インサートナットとボルトとにより、副燃料タンク42と共締め状態で連結されている。すなわち、一対の支持アーム43a,43bの端部における前後2箇所において、副燃料タンク42と受け板部材44とが固定されている。これにより副燃料タンク42が位置決めされた状態でフレーム部材43に支持されている。   The backing plate member 44 is placed and supported on the upper portion of the frame member 43, and the auxiliary fuel tank is connected to the connecting portions 43a1 and 43b1 of the extending end portions of the supporting arms 43a and 43b on both the front and rear sides by insert nuts and bolts. 42 and is connected together. That is, the auxiliary fuel tank 42 and the receiving plate member 44 are fixed at two positions in the front and rear at the ends of the pair of support arms 43a and 43b. As a result, the sub fuel tank 42 is supported by the frame member 43 in a positioned state.

上記したように、副燃料タンク42と受け板部材44とは、複数のインサートナットとボルトとの締結により一体化させた状態で支持されている。このインサートナットは、例えば、機体の振動等によって強い力が掛かり続けると、破損するおそれがある。しかし、上記構成では、フレーム部材43と受け板部材44とが前後両側に片持ち状に延びる幅狭の支持アーム43a,43bを介して支持されるものであるから、例えば、エンジン5等から発生する機体の振動が、幅狭の支持アーム43a,43bを介してある程度吸収されて、受け板部材44や副燃料タンク42にそのまま伝わることを回避できる。その結果、インサートナットが短期間で破損する等のおそれが少ないものになる。従って、この実施形態では、支持アーム43a,43bが機体の振動を吸収する振動吸収部材として機能する。   As described above, the auxiliary fuel tank 42 and the receiving plate member 44 are supported in an integrated state by fastening a plurality of insert nuts and bolts. For example, the insert nut may be damaged if a strong force is continuously applied due to vibration of the airframe or the like. However, in the above configuration, the frame member 43 and the receiving plate member 44 are supported by the narrow support arms 43a and 43b extending in a cantilevered manner on both the front and rear sides. It is possible to avoid the vibration of the machine body being absorbed to some extent via the narrow support arms 43a and 43b and being transmitted to the receiving plate member 44 and the auxiliary fuel tank 42 as they are. As a result, the insert nut is less likely to be damaged in a short period of time. Therefore, in this embodiment, the support arms 43a and 43b function as vibration absorbing members that absorb vibrations of the airframe.

〔燃料供給経路〕
次に、燃料供給経路について説明する。
このトラクタには、図8に示すように、主燃料タンク40の下部に設けられた供給口49からエンジン5に燃料を供給する主燃料供給路L1と、主燃料供給路L1の途中部に連通接続されて、副燃料タンク42の下部に設けられた供給口48からエンジン5に燃料を供給する副燃料供給路L2と、副燃料供給路L2中に設けられ、副燃料タンク42からエンジン5側への燃料の流動を許容し、逆方向の流動を阻止する逆止弁50とが備えられている。
[Fuel supply route]
Next, the fuel supply path will be described.
As shown in FIG. 8, the tractor communicates with a main fuel supply path L1 for supplying fuel to the engine 5 from a supply port 49 provided at a lower portion of the main fuel tank 40, and a middle portion of the main fuel supply path L1. An auxiliary fuel supply path L2 that is connected to supply fuel to the engine 5 from a supply port 48 provided in the lower part of the auxiliary fuel tank 42, and is provided in the auxiliary fuel supply path L2, and from the auxiliary fuel tank 42 to the engine 5 side. And a check valve 50 that allows the fuel to flow in the reverse direction and prevents reverse flow.

又、主燃料供給路L1と副燃料供給路L2との接続箇所Q、主燃料供給路L1の供給口49から接続箇所Qまでの経路部分51、及び、副燃料供給路L2の供給口48から接続箇所Qまでの経路部分52の夫々が、主燃料タンク40及び副燃料タンク42の下端部と略同じ高さに設定されている。そして、前記各経路部分51,52の夫々が、クラッチハウジング9の下側に位置する状態で備えられている。   Further, from the connection point Q between the main fuel supply path L1 and the auxiliary fuel supply path L2, the path portion 51 from the supply port 49 of the main fuel supply path L1 to the connection point Q, and the supply port 48 of the auxiliary fuel supply path L2. Each of the route portions 52 to the connection point Q is set at substantially the same height as the lower end portions of the main fuel tank 40 and the sub fuel tank 42. Each of the path portions 51 and 52 is provided in a state of being located below the clutch housing 9.

具体的には、主燃料タンク40の右側面の下部に供給口49が形成され、副燃料タンク42の左側面の下部に供給口48が形成されている。主燃料タンク40の供給口49と、副燃料タンク42の供給口48とが連通管53によって接続されている。   Specifically, a supply port 49 is formed in the lower portion of the right side surface of the main fuel tank 40, and a supply port 48 is formed in the lower portion of the left side surface of the sub fuel tank 42. A supply port 49 of the main fuel tank 40 and a supply port 48 of the sub fuel tank 42 are connected by a communication pipe 53.

図9,10にも示すように、連通管53の途中部に、副燃料タンク42側から主燃料タンク40側への燃料の流動を許容し、且つ、主燃料タンク40から副燃料タンク42への燃料の流動を阻止する逆止弁50が介装されている。又、連通管53における逆止弁50よりも主燃料タンク40側であって、主燃料タンク40に近い位置には、連通管53の左右両側通路部分とエンジン5に対する供給路部分とが夫々接続される略T字形の管継手54が備えられている。   As shown in FIGS. 9 and 10, fuel is allowed to flow from the auxiliary fuel tank 42 side to the main fuel tank 40 side in the middle of the communication pipe 53, and from the main fuel tank 40 to the auxiliary fuel tank 42. A check valve 50 for intervening the flow of the fuel is interposed. Further, the left and right side passage portions of the communication pipe 53 and the supply passage portion for the engine 5 are connected to the main fuel tank 40 side of the communication pipe 53 and closer to the main fuel tank 40 than the check valve 50. A substantially T-shaped pipe joint 54 is provided.

管継手54が位置する箇所が前記接続箇所Qに相当し、主燃料タンク40の供給口49から管継手54までの間の経路部分51と、管継手54からエンジン5に対する燃料供給路55とにより、前記主燃料供給路L1が構成されている。又、副燃料タンク42の供給口48から管継手54までの間の経路部分52と、管継手54からエンジン5に対する燃料供給路55とにより、前記副燃料供給路L2が構成されている。尚、エンジン5にて消費されずに余剰となった燃料は、図示しない戻り配管を介して主燃料タンク40に戻される。   A place where the pipe joint 54 is located corresponds to the connection place Q, and is constituted by a path portion 51 from the supply port 49 of the main fuel tank 40 to the pipe joint 54 and a fuel supply path 55 from the pipe joint 54 to the engine 5. The main fuel supply path L1 is configured. The secondary fuel supply path L2 is constituted by a path portion 52 from the supply port 48 of the secondary fuel tank 42 to the pipe joint 54 and a fuel supply path 55 from the pipe joint 54 to the engine 5. The surplus fuel that is not consumed by the engine 5 is returned to the main fuel tank 40 via a return pipe (not shown).

図9に示すように、連通管53は、クラッチハウジング9の下側に位置して左右方向に延びる状態で配備されている。このように連通管53は全範囲にわたってクラッチハウジング9の下側の低い位置に位置する状態で備えられている。従って、主燃料供給路K1と副燃料供給路L2との接続箇所Q、主燃料供給路L1の供給口49から接続箇所Qまでの経路部分51、及び、副燃料供給路L2の供給口48から接続箇所Qまでの経路部分52の夫々が、主燃料タンク40及び副燃料タンク42の下端部と略同じ高さに設定されることになる。   As shown in FIG. 9, the communication pipe 53 is arranged in a state of being positioned below the clutch housing 9 and extending in the left-right direction. Thus, the communication pipe 53 is provided in a state of being located at a lower position on the lower side of the clutch housing 9 over the entire range. Accordingly, from the connection point Q between the main fuel supply path K1 and the auxiliary fuel supply path L2, the path portion 51 from the supply port 49 of the main fuel supply path L1 to the connection point Q, and the supply port 48 of the auxiliary fuel supply path L2. Each of the route portions 52 to the connection point Q is set to be substantially the same height as the lower end portions of the main fuel tank 40 and the sub fuel tank 42.

連通管53は、側面視で略U字形に形成されたカバー部材56によって下方側から覆われている。カバー部材56は、クラッチハウジング9の下面側に形成された支持部57にボルト58の締結により固定されている。カバー部材56によって、圃場の土や石等が接触して連通管53が損傷することを回避できる。   The communication pipe 53 is covered from below by a cover member 56 formed in a substantially U shape in a side view. The cover member 56 is fixed to a support portion 57 formed on the lower surface side of the clutch housing 9 by fastening bolts 58. The cover member 56 can prevent the communication pipe 53 from being damaged by contact with soil, stones, or the like in the field.

図6に示すように、副燃料タンク42のブリーザホース59は、ゴムホースの一端をタンク側の接続口60に接続し、途中部を高い箇所に保持具61により位置保持し、他端側は低い位置に位置させて開口部を潰すように成形して塵埃の侵入を防止するようになっている。このように、金属材を用いた強固な支持構造ではなくゴムホースだけの簡単な構成として、機体に対して後付けで対応可能な構成としている。   As shown in FIG. 6, the breather hose 59 of the auxiliary fuel tank 42 has one end of the rubber hose connected to the connection port 60 on the tank side, and the middle part is held at a high place by a holding tool 61 and the other end side is low. It is formed so as to crush the opening at the position to prevent the intrusion of dust. Thus, it is set as the structure which can respond by retrofit with respect to a body as a simple structure only of a rubber hose instead of the firm support structure using a metal material.

〔別実施形態〕
(1)上記実施形態では、振動吸収部材として、フレーム部材43の左右方向途中部から前部側及び後部側に夫々、片持ち状に延設された幅狭の支持アーム43a,43bが備えられる構成としたが、この構成に代えて、振動吸収部材として、例えば、フレーム部材43にゴム材等の弾性体を備えてその弾性体を介して受け板部材を支持させる構成としてもよく、それ以外の材質のものでもよい。要するに、機体の振動を吸収して受け板部材すなわち、副燃料タンクを支持するものであればよい。
[Another embodiment]
(1) In the above embodiment, as the vibration absorbing member, the narrow support arms 43a and 43b that are cantilevered from the middle part in the left-right direction of the frame member 43 to the front side and the rear side are provided. However, instead of this configuration, for example, the frame member 43 may be provided with an elastic body such as a rubber material and the receiving plate member may be supported via the elastic body. It may be made of any material. In short, it may be anything that absorbs the vibration of the airframe and supports the backing plate member, that is, the auxiliary fuel tank.

(2)上記実施形態では、主燃料タンク40と副燃料タンク42とが機体横幅方向に並んで位置する状態で備えられる構成としたが、この構成に代えて、主燃料タンク40と副燃料タンク42とが機体前後方向に並ぶ状態で備える構成や、主燃料タンク40と副燃料タンク42とが上下方向に並ぶ状態で備える構成としてもよい。 (2) In the above-described embodiment, the main fuel tank 40 and the auxiliary fuel tank 42 are provided in a state where they are arranged side by side in the lateral width direction of the fuselage, but the main fuel tank 40 and the auxiliary fuel tank are replaced with this configuration. 42 may be provided in a state in which the main fuel tank 40 and the sub fuel tank 42 are arranged in the vertical direction.

(3)上記実施形態では、作業車としてトラクタに適用したものを示したが、作業車としては、トラクタに限らず、コンバインや田植機等の他の種類の農業用の作業車でもよく、農業用の作業車に限らず、建設機械等の他の作業車でもよい。 (3) In the above embodiment, the work vehicle applied to a tractor is shown. However, the work vehicle is not limited to a tractor, and may be another type of agricultural work vehicle such as a combine or a rice transplanter. Other work vehicles such as construction machines may be used.

本発明は、主燃料タンクと副燃料タンクとを備えている作業車に適用できる。   The present invention can be applied to a work vehicle including a main fuel tank and a sub fuel tank.

4 ボンネット
4A 側壁部
5 エンジン
7 キャビン
9 クラッチハウジング
10 ミッションケース
20 天井部
21 第一板部材
21a 連結用板面部分
21b 外端側覆い部分
22 第二板部材
22b 外端面
24 排気管
25 切欠部
29 遮熱カバー
31B 縦向き延設部
40 主燃料タンク
41 支持機構
42 副燃料タンク
43 フレーム部材
43a,43b 振動吸収部材
44 受け板部材
45 バンド部材
48 供給口
49 供給口
50 逆止弁
L1 主燃料供給路
L2 副燃料供給路
Q 接続箇所
4 Bonnet 4A Side wall part 5 Engine 7 Cabin 9 Clutch housing 10 Transmission case 20 Ceiling part 21 First plate member 21a Connection plate surface part 21b Outer end side cover part 22 Second plate member 22b Outer end face 24 Exhaust pipe 25 Notch 29 Heat shield cover 31B Vertically extending portion 40 Main fuel tank 41 Support mechanism 42 Sub fuel tank 43 Frame member 43a, 43b Vibration absorbing member 44 Back plate member 45 Band member 48 Supply port 49 Supply port 50 Check valve L1 Main fuel supply Road L2 Secondary fuel supply path Q Connection point

Claims (5)

機体に対して一体的に保持された状態で支持される主燃料タンクと、
前記主燃料タンクに対して補助的に備えられ、且つ、機体に対して支持機構を介して支持される副燃料タンクとが備えられ、
前記支持機構が、
機体フレームから固定延設されたフレーム部材と、
前記副燃料タンクを載置支持するとともに、前記副燃料タンクがネジ止め固定される受け板部材と、
前記副燃料タンクを上方から押えるとともに、両側端部が前記フレーム部材に連結された浮き上がり防止用のバンド部材と、
前記フレーム部材に設けられて機体の振動を吸収する振動吸収部材とを備えている作業車。
A main fuel tank supported in a state of being held integrally with the airframe;
An auxiliary fuel tank provided as an auxiliary to the main fuel tank and supported through a support mechanism with respect to the airframe;
The support mechanism is
A frame member fixedly extended from the fuselage frame;
A receiving plate member for mounting and supporting the auxiliary fuel tank and to which the auxiliary fuel tank is fixed with screws;
A band member for preventing the lifting from the upper side while holding the auxiliary fuel tank from above and having both end portions connected to the frame member;
A work vehicle provided with a vibration absorbing member that is provided on the frame member and absorbs vibrations of the airframe.
前記主燃料タンクと前記副燃料タンクとが機体横幅方向に並んで位置する状態で備えられ、
前記主燃料タンクの下部に設けられた供給口からエンジンに燃料を供給する主燃料供給路と、前記主燃料供給路の途中部に連通接続されて、前記副燃料タンクの下部に設けられた供給口から前記エンジンに燃料を供給する副燃料供給路と、前記副燃料供給路中に設けられ、前記副燃料タンクから前記エンジン側への燃料の流動を許容し、逆方向の流動を阻止する逆止弁とが備えられ、
前記主燃料供給路と前記副燃料供給路との接続箇所、前記主燃料供給路の前記供給口から前記接続箇所までの経路部分、及び、前記副燃料供給路の前記供給口から前記接続箇所までの経路部分の夫々が、前記主燃料タンク及び前記副燃料タンクの下端部と略同じ高さに設定されている請求項1に記載の作業車。
The main fuel tank and the auxiliary fuel tank are provided in a state of being aligned in the lateral width direction of the fuselage,
A main fuel supply passage for supplying fuel to the engine from a supply port provided at the lower portion of the main fuel tank, and a supply provided at the lower portion of the sub fuel tank connected to the middle portion of the main fuel supply passage. An auxiliary fuel supply passage for supplying fuel to the engine from the mouth, and a reverse passage that is provided in the auxiliary fuel supply passage, allows fuel flow from the auxiliary fuel tank to the engine side, and prevents reverse flow. With a stop valve,
Connection point between the main fuel supply path and the sub fuel supply path, a path part from the supply port of the main fuel supply path to the connection point, and from the supply port of the auxiliary fuel supply path to the connection point 2. The work vehicle according to claim 1, wherein each of the path portions is set at substantially the same height as the lower end portions of the main fuel tank and the sub fuel tank.
機体が、エンジンと、前記エンジンの後部に連結されたクラッチハウジングと、前記クラッチハウジングの後部に連なるミッションケースとを備え、
前記主燃料供給路の前記供給口から前記接続箇所までの経路部分、及び、前記副燃料供給路の前記供給口から前記接続箇所までの経路部分の夫々が、前記クラッチハウジングの下側に位置する状態で備えられている請求項2に記載の作業車。
The fuselage includes an engine, a clutch housing connected to the rear part of the engine, and a transmission case connected to the rear part of the clutch housing,
A path portion from the supply port to the connection location of the main fuel supply path and a path portion from the supply port to the connection location of the sub fuel supply path are located below the clutch housing. The work vehicle according to claim 2, which is provided in a state.
機体前部に備えられたボンネットの内部に、エンジンと、前記エンジンからの排気を前記ボンネットの側壁部の下部を通して外方に案内する排気管とが備えられ、
前記ボンネットの側壁部の下端部に前記排気管との間の隙間を確保するために凹入する切欠部が形成され、
前記排気管における前記ボンネットの側壁部よりも外方に露出する部位の外方側を覆う遮熱カバーが備えられ、
前記遮熱カバーに、前記ボンネットの前記切欠部の横側外方を覆う縦向き延設部が備えられている請求項1から3のいずれか1項に記載の作業車。
Inside the bonnet provided at the front of the fuselage is provided with an engine and an exhaust pipe for guiding the exhaust from the engine to the outside through the lower part of the side wall of the bonnet,
A notch that is recessed to form a clearance between the exhaust pipe and the lower end of the side wall of the bonnet is formed,
A heat-insulating cover that covers an outer side of a portion of the exhaust pipe that is exposed outward from a side wall portion of the bonnet;
The work vehicle according to any one of claims 1 to 3, wherein the heat shield cover includes a vertically extending portion that covers a lateral outer side of the notch portion of the bonnet.
機体の運転部の上方を覆うキャビンが備えられ、
前記キャビンの天井部は、上部外方側に位置する第一板部材と、下部内方側に位置する第二板部材とを備え、且つ、前記第一板部材と前記第二板部材との間に内部空間を形成する状態で、前記第一板部材と前記第二板部材の外周部同士が接続され、
前記第一板部材及び前記第二板部材夫々の外周部は、所定幅にわたって前記第一板部材及び前記第二板部材の板面同士が接続され、
前記第一板部材は、前記第二板部材の外周部に接続される連結用板面部分と、前記第二板部材の外端面を覆う外端側覆い部分とが一連に連なる状態で設けられている請求項1から4のいずれか1項に記載の作業車。
A cabin covering the upper part of the operating part of the fuselage is provided,
The ceiling portion of the cabin includes a first plate member located on the upper outer side and a second plate member located on the lower inner side, and the first plate member and the second plate member In the state of forming an internal space between the outer peripheral portions of the first plate member and the second plate member are connected,
The outer peripheral portion of each of the first plate member and the second plate member is connected to the plate surfaces of the first plate member and the second plate member over a predetermined width,
The first plate member is provided in a state in which a connecting plate surface portion connected to the outer peripheral portion of the second plate member and an outer end side covering portion covering the outer end surface of the second plate member are continuously connected. The work vehicle according to any one of claims 1 to 4.
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020104655A (en) * 2018-12-27 2020-07-09 株式会社クボタ Exhaust pipe support member and exhaust pipe support structure
JP2020152147A (en) * 2019-03-18 2020-09-24 株式会社クボタ Fixing structure of fuel tank and work vehicle
WO2022107676A1 (en) * 2020-11-17 2022-05-27 ヤンマーホールディングス株式会社 Tractor

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020099283A (en) * 2018-12-25 2020-07-02 株式会社クボタ Harvester

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020104655A (en) * 2018-12-27 2020-07-09 株式会社クボタ Exhaust pipe support member and exhaust pipe support structure
JP7084865B2 (en) 2018-12-27 2022-06-15 株式会社クボタ Exhaust pipe support member and exhaust pipe support structure
JP2020152147A (en) * 2019-03-18 2020-09-24 株式会社クボタ Fixing structure of fuel tank and work vehicle
JP7066278B2 (en) 2019-03-18 2022-05-13 株式会社クボタ Fixed structure of fuel tank and work vehicle
WO2022107676A1 (en) * 2020-11-17 2022-05-27 ヤンマーホールディングス株式会社 Tractor

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