JPS6122508Y2

JPS6122508Y2 -

Info

Publication number: JPS6122508Y2
Application number: JP1980139135U
Authority: JP
Priority date: 1980-09-30
Filing date: 1980-09-30
Publication date: 1986-07-07
Also published as: JPS5760556U

Description

【考案の詳細な説明】本考案は農業用トラツクターに座席の改良に関
するものである。[Detailed Description of the Invention] The present invention relates to an improved seat for an agricultural tractor.

従来この種の座席における背凭部は一般車両用
のものと略一構造（背凭部が上下一体で分割する
ものでない）であつた。従つて座席の真後ろに油
圧装置などの操作杆を配設した農業用トラツクタ
ーにおいては座席が邪魔になるため座乗した状態
で操作杆を操作できないため、車体より降りてこ
れらの作業をせざるを得ない欠陥があつた。 Conventionally, the backrest portion of this type of seat has had approximately the same structure as that of a general vehicle (the backrest portion is an integral part of the upper and lower parts, and is not divided into two parts). Therefore, in agricultural tractors that have operating levers for hydraulic equipment and other devices located directly behind the seat, the seat gets in the way and the operator cannot operate the operating levers while sitting on the vehicle, so the operator must get off the vehicle to perform these tasks. There was an irreparable flaw.

本考案は斯る事情に鑑みて考案されたものであ
り、その要旨とするところは、本体の背凭部を上
下に二分割して上部背凭部と下部背凭部とを形成
すると共に両背凭部間に渉つて、上部背凭部を下
部背凭部の後方に折畳む折畳機構を装着してなる
農業用トラツクターに座席に係るものであり、前
記折畳機構により上部背凭部を下部背凭部の後方
に折畳むことにより背凭の高さを低くし、運転兼
作業者が座乗した状態で、前記座席の後方におけ
る作業が楽に行ない得るようにしたものである。 The present invention was devised in view of such circumstances, and its gist is to divide the backrest portion of the main body into two parts, upper and lower, to form an upper backrest portion and a lower backrest portion, and to This invention relates to a seat on an agricultural tractor, which is equipped with a folding mechanism that folds an upper backrest part behind a lower backrest part between the backrest parts, and the upper backrest part is folded by the folding mechanism. The height of the backrest is lowered by folding the backrest toward the rear of the lower backrest, so that the driver/operator can easily work behind the seat while sitting on the seat.

以下、本考案の実施例を図面に基づいて説明す
ると、図中Ａは農業用トラツクターの座席におけ
る背凭部、Ｂは座席の座部を夫々示し、背凭部Ａ
は上部背凭部a₁と下部背凭a₂とより構成されてお
り、この両背凭部a₁，a₂は折畳機構イによつて、
上部背凭部a₁が下部背凭部a₂後方に折畳み自在に
連結されている。図示する折畳機構イは上部背凭
部a₁の下部背凭部a₂の下部側面に固定したロツク
プレート１と下部背凭部の上部側面に固定したガ
イドプレート２とを夫々後方に向けて突設すると
共にロツクプレート１がガイドプレート２に回動
自在に枢着し且つガイドプレート２におけるロツ
クプレート１の先端部に設けた鉤状形ストツパ部
１ａが係合する位置にガイド孔２ａを開穿せし
め、このガイド孔２ａ内に操作杆３に連結せる係
止ピン４を移動自在に前記ガイドプレート２に取
付けてなるものである。 Hereinafter, embodiments of the present invention will be described based on the drawings.
is composed of an upper backrest part _a1 and a lower backrest part _a2 , and both backrest parts _a1 and _a2 are folded by a folding mechanism (a).
The upper backrest part _a1 is foldably connected to the rear of the lower backrest part _a2 . The illustrated folding mechanism A has a lock plate 1 fixed to the lower side of the lower backrest _A2 of the upper backrest _A1 and a guide plate 2 fixed to the upper side of the lower backrest facing rearward. A guide hole 2a is provided at a position where the lock plate 1 is rotatably pivotally attached to the guide plate 2 and is engaged with a hook-shaped stopper portion 1a provided at the tip of the lock plate 1 in the guide plate 2. A locking pin 4, which is bored into the guide hole 2a and connected to the operating rod 3, is movably attached to the guide plate 2.

前記図示す折畳機構イを詳述すると、ロツクプ
レート１は、上部背凭部a₁の一側面にブラケツト
５を介してボルト９，９で固定し、先端部に下部
背凭部a₂背面方向に弯曲せる鉤形状ストツパ部１
ａを設ける。そしてロツクプレート１ストツパ部
１ａの基部に設けた通孔１ｂとガイドプレート２
の通孔２ｂとの支承軸８を通して、ロツクプレー
ト１をこの支承軸８を支点に回動するようにす
る。一方ガイドプレート２はブラケツト７を介し
て下部背凭部a₂の上部一側面にボルト１０，１０
で固定する。そしてこのガイドプレート２の前記
支承軸８取付位置より下方に操作杆３をボルト６
で回動自在に枢着すると共にその操作杆３の先端
に係止ピン４を固定し、ガイドプレート２には前
記係止ピン４が移動自在に嵌挿するガイド孔２ａ
を開穿する。このガイド孔２ａはその頂部に係止
ピン４が位置した際、前記ロツクプレート１のス
トツパ部１ａが係止ピン４を係合するように開穿
されている。そして係止ピン４にロツクプレート
１のストツパ部１ａが係止されている状態（第３
図実線）で、上部背凭部a₁が起立状の下部背凭部
a₂上部の延長線上に起立される。従つて上部背凭
部a₁を前方にやや傾けると、それに伴い上部背凭
部a₁に固定せるロツクプレート１は支承軸８を支
点に回動してストツパ部１ａと係止ピン４との係
合状態が解放される。従つて操作杆３を上方に回
動させて係止ピン４をガイド孔２ａの下方に移動
させると、ロツクプレート１のストツパ部１ａと
係止ピン４の係合状態が解放される。而して上部
背凭部a₁を後方に押動すると、上部背凭部a₁は支
承軸８を支点に後方に回動して下部背凭部a₂の背
面に折り畳まれる。この状態で、背凭部Ａ後方に
配設した操作部等を操作して作業する。そして作
業後、トラツクターを運行させるため上部背凭部
a₁を起立させるには、操作杆３を回動させて、係
止ピン４をガイド孔２ａの頂部に位置せしめて、
上部背凭部a₁を押し上げると下部背凭部a₂上に上
部背凭部a₁が載置して、使用状態になる。即ち、
ロツクプレート１のストツパ部１ａの係止ピン４
が係合させるため、上部背凭部a₁は固定され、前
後に倒れることがない。 To explain in detail the folding mechanism A shown above, the lock plate 1 is fixed to one side of the upper backrest part _A1 with bolts 9, 9 via a bracket 5, and the lock plate 1 is fixed to one side of the upper backrest part A1 with bolts 9, 9, and the front end of the lock plate 1 is fixed to one side of the upper backrest part _A1 . Hook-shaped stopper part 1 that can be curved in the direction
Provide a. The through hole 1b provided at the base of the stopper portion 1a of the lock plate 1 and the guide plate 2
The lock plate 1 is rotated about the support shaft 8 through the support shaft 8 through the through hole 2b. On the other hand, the guide plate 2 is attached to one side of the upper part of the lower backrest part _A2 via the bracket 7 with bolts 10, 10.
Fix it with. Then, the operating rod 3 is attached to the bolt 6 below the mounting position of the support shaft 8 of the guide plate 2.
A locking pin 4 is fixed to the tip of the operating rod 3, and the guide plate 2 has a guide hole 2a into which the locking pin 4 is movably inserted.
Open the hole. This guide hole 2a is opened so that the stopper portion 1a of the lock plate 1 engages with the locking pin 4 when the locking pin 4 is positioned at the top thereof. Then, the stopper portion 1a of the lock plate 1 is locked to the locking pin 4 (the third
solid line), the upper backrest part a ₁ is the lower backrest part with an upright shape.
a ₂ Stand on the extension line of the top. Therefore, when the upper backrest part _a1 is slightly tilted forward, the lock plate 1 fixed to the upper backrest part _a1 rotates about the support shaft 8, and the stopper part 1a and the locking pin 4 are rotated. The engaged state is released. Therefore, when the operating rod 3 is rotated upward to move the locking pin 4 below the guide hole 2a, the engagement between the stopper portion 1a of the lock plate 1 and the locking pin 4 is released. When the upper backrest part _a1 is pushed rearward, the upper backrest part _a1 rotates rearward about the support shaft 8 and is folded onto the back surface of the lower backrest part _a2 . In this state, work is performed by operating the operating section etc. arranged behind the backrest section A. After the work is completed, the upper backrest section is opened to operate the tractor.
To raise a ₁ , rotate the operating rod 3 to position the locking pin 4 at the top of the guide hole 2a,
When the upper backrest part _a1 is pushed up, the upper backrest part _a1 is placed on the lower backrest part _a2 , and is ready for use. That is,
Locking pin 4 of stopper portion 1a of lock plate 1
, the upper backrest part _a1 is fixed and will not fall forward or backward.

第５図は、係止ピン４とガイドプレート２との
上部との間に発条１１を張設せしめて、係止ピン
４を常時ガイド孔２ａの上部に牽引せしめること
により、上部背凭部a₁を起立せしめる際操作杆３
を操作することなく係止ピン４に係合し固定され
る。 FIG. 5 shows a structure in which the upper backrest part a is stretched by tensioning the spring 11 between the locking pin 4 and the upper part of the guide plate 2, and by constantly pulling the locking pin 4 to the upper part of the guide hole 2a. Operation lever 3 when raising ₁
It is engaged with the locking pin 4 and fixed without any operation.

なお、上部背凭部a₁と下部背凭部a₂との他側面
には上部背凭部a₁を下部背凭部a₂に適宜連結部材
を介して回動自在に枢着している。 In addition, on the other side of the upper backrest part _a1 and the lower backrest part _a2 , the upper backrest part _a1 is rotatably connected to the lower backrest part _a2 via an appropriate connecting member. .

本考案は叙上の如く上部背凭部が下部背凭部の
後方に折畳み自在に取付けられているため、座席
に座乗した状態で前半身を座席の後方に向けて座
席後方に配設した操作部の操作等の作業が行なえ
る。従つて、従来の如く車体外に降りそれらの作
業をする必要がないから、作業性が頗る良いし、
又、座乗したまま作業できるから、作業が楽で作
業者の疲労等を軽減できるなどの実用的効果を有
する。加えて、本考案は本体の背凭部を上下に二
分割して上部背凭部と下部背凭部とを形成してい
るため、通常運転時においては下部背凭部の上
に、上部背凭部が位置しているため、運転者の上
半身全体が支持され、運転疲労を低減できる。ま
た、後方の油圧装置などを操作する際には、上部
背凭部が下部背凭部の背裏側に折り畳まれ、下部
背凭部に運転者の腰部を支持するため、身体の安
定性が良く操作が確実且つ迅速に行なえる。 As mentioned above, in this invention, the upper backrest part is foldably attached to the rear of the lower backrest part, so when sitting on the seat, the front half of the body can be placed behind the seat, facing towards the rear of the seat. Able to perform tasks such as operating the operating section. Therefore, there is no need to go down outside the vehicle body and perform such work as in the past, so work efficiency is greatly improved.
In addition, since work can be done while sitting on the seat, the work is easy and has practical effects such as reducing worker fatigue. In addition, in this invention, the backrest of the main body is divided into upper and lower halves to form an upper backrest and a lower backrest, so during normal operation, the upper backrest is placed above the lower backrest. The position of the seat supports the driver's entire upper body, reducing driving fatigue. In addition, when operating the rear hydraulic equipment, etc., the upper backrest is folded behind the back of the lower backrest, and the lower back supports the driver's lower back, which improves the stability of the driver's body. Operation can be performed reliably and quickly.

更に、下部背凭部と上部背凭部との間に設けた
折畳機構は前述の如く構成されているため、上部
背凭部の前後方向の押動と操作杆の押引により、
上部背凭部は折畳まれる。そのため、上部背凭部
の折畳操作が簡単でその操作性が頗る良い。 Furthermore, since the folding mechanism provided between the lower backrest and the upper backrest is constructed as described above, the folding mechanism provided between the lower backrest and the upper backrest is configured as described above.
The upper backrest is foldable. Therefore, the folding operation of the upper backrest is easy and the operability is excellent.

依つて所期の目的を達成し得る。 Thus, the intended purpose can be achieved.

[Brief explanation of the drawing]

図面は本考案の実施例を示し、第１図は着装状
態を示す斜視図、第２図は側面図、第３図は要部
の作動状態を示す側面図、第４図はその分解斜視
図、第５図は要部の他の実施例における分解斜視
図である。図中、Ａは本体の背凭部、a₁は上部背凭部、a₂
は下部背凭部、イは折畳機構を夫々示す。 The drawings show an embodiment of the present invention; FIG. 1 is a perspective view showing the installed state, FIG. 2 is a side view, FIG. 3 is a side view showing the operating state of the main parts, and FIG. 4 is an exploded perspective view thereof. , FIG. 5 is an exploded perspective view of another embodiment of the main part. In the figure, A is the backrest of the main body, a ₁ is the upper backrest, and a ₂
1 shows the lower backrest, and 1 shows the folding mechanism.

Claims

[Scope of claim for utility model registration] An upper backrest portion and a lower backrest portion formed by dividing the backrest portion of the main body into upper and lower halves in the seat of an agricultural tractor equipped with an operating lever for a hydraulic device, etc. at the rear. The folding mechanism is fixed to the upper part of the lower back support part, and the folding mechanism is fixed to the upper part of the lower back support part, and the folding mechanism is fixed to the upper part of the lower back support part. The guide plate is fixed and rotatably connected to the guide plate, and includes a lock plate having a stopper portion, and an operating rod having a locking pin and rotatably connected to the guide plate, and the guide plate is fixed to the guide plate. An agricultural tractor seat characterized in that a locking pin of the operating lever is movably inserted into the hole, and a stopper portion of a lock plate is engaged with the locking pin.