【０００１】
【発明の属する技術分野】
本発明は、苗載台にマット状苗の浮上防止装置を設けた田植機に関するものである。
【０００２】
【従来の技術】
従来、特開昭５５−１４１１１２号公報、特開昭５６−８１６１６号公報、特開昭５６−１５１４１５号公報等で開示された通り、苗床浮上防止装置はその上側あるいは下側を横方向に延びる支持軸に固着した片側支持になっており、苗供給時には、この支持軸側を支点に上方回動させていた。また、上下両側を固着することは苗補給が困難になることから実施されていなかった。
【０００３】
【発明が解決しようとする課題】
前述の従来技術のものでは、苗床が浮き上る場合に支持軸とは反対側の苗床浮上防止杆部分が自由端になっているために苗床の浮上力で変形してしまい的確な浮上防止ができない欠点があった。また、この変形を防止するには杆を太くしなければならず、大径な杆にすると苗茎の移送抵抗が大きくなる欠点があった。
【０００４】
【課題を解決するための手段】
前述の課題を解消するために、請求項１記載の発明は、左右往復移動しながら複数の移植装置（７）へ各々苗を供給する左右端の側壁（３）と仕切り壁（２）と苗床受底板（４）とで構成された苗載置台（１）に載せた複数のマット状苗（Ｎ）の浮き上がりを防止する複数の苗浮上防止装置（１７）を設けた田植機において、該各苗浮上防止装置（１７）は上端側に設けた上軸（１９）と下端側に設けた下軸（１８）とに下部直線部と下部直線部の両端から内向きに立上る傾斜部と外向きの上部直線部からなる略Ｕ字形の苗床浮上防止杆（２０）を固着して構成し、苗載置台（１）の左右端の側壁（３）と各仕切り壁（２）とに各々立設した上側支柱（２２）及び下側支柱（２１）の上部に相対向して切り欠いた開口（ロ、イ）を有した上下軸係止体（２４、２３）を設け、該上下軸係止体（２４、２３）の開口（ロ、イ）に複数の苗浮上防止装置（１７）の上軸（１９）と下軸（１８）とを苗浮上防止装置（１７）を変形させて各々各別に着脱自在に装着すると共に、苗床浮上防止杆（２０）の下部直線部の長さを前記上側支柱（２２）と下側支柱（２１）との距離と略同じに構成し、側面視で苗床浮上防止杆（２０）の下部直線部の上端を上側支柱（２２）の位置に位置させたことを特徴とする田植機としたものであり、請求項２記載の発明は、上下軸係止体（２４、２３）に上下軸（１９、１８）を嵌入させる開口（ロ、イ）が複数段形成されていることを特徴とする請求項１記載の田植機としたものである。
【０００５】
【発明の実施の形態】
１は田植機に装備された苗載置台である。この苗載置台１は、田植機の植付け条の多、少に応じてその大きさがことなるが、図例では４条植えの事例について説明する。即ち、４条植え田植機の苗載置台１は、左右に仕切り壁２で仕切られて左右端の側壁３、３と仕切り壁２、２及び苗床受底板４とで４個のマット状苗Ｎが載置可能になっている。また、各別の４個の底板部分には苗床送りベルト５が底板を開口して張設されている。一般には、この苗載置台１は合成樹脂によって構成される。
【０００６】
この苗載置台１は、田植機の移植部伝動ケ−ス６の上部側に配設され、植付装置７の側が下位となるよう傾斜させて田植機のフレ−ムを構成した前記伝動ケ−ス６側に左右移動自由に支持体８、８を介して装着されている。この下端側の支持体８は、苗受止枠９を一体的になしていて、載置されるマット状苗Ｎのマット部の下端面及びその裏面を受け止めるように側面視がＬ字状に構成されている。また、この苗受止枠９には、前記植付装置７の植付具の爪７ａが上側から介入する苗分離口１０が穿たれている。図中６ａは伝動ケ−ス６から後方側へ分かれて延びる植付装置７を装着する分岐伝動ケ−スである。
【０００７】
１１は左右横移動軸で、前記移植部伝動ケ−ス６内の左右往復横移動機構（図示せず。）によって作動される軸であり、ケ−ス６の左右両側に突出して左右横移動する。そして、この移動軸１１と前記苗載置台１の裏面側とを連動杆１２及び金具１３を介して連結している。
したがって、この苗載置台１に搭載されたマット状苗Ｎは、そのマットの下端が苗受止枠９で受けられた状態で左右に往復横移動され、苗Ｎが苗分離口１０に順次繰り出される。そして、この繰り出された苗Ｎは植付装置７による植付具の爪７ａによって１株づつ分離されて下位側の圃場面に植え付けられる。
【０００８】
図中符号１４は走行車体（図示せず。）側に田植機を取り付けるリンク機構である。１５は整地フロ−ト１６を装着させるフロントア−ムである。
このように構成された苗載置台１においては、マット状苗Ｎのマットが浮き上がったり、めくり上がったりするのを防止する苗マット上面を押さえる苗浮上防止装置１７を装備させる。
【０００９】
この苗浮上防止装置１７は、図３で示す通り、上下方向に所定の平行間隔を保持させた下軸１８と上軸１９に、略Ｕ字形に上下中間部を下方へ凹ませた複数本の浮上防止杆２０，２０・・を取り付けた形態にしている。尚、この実施例では、２個のマット状苗Ｎの浮上を防止するものであり、実施例の４条植付けタイプの苗載置台１ではこの苗浮上防止装置１７が２個必要になる。
【００１０】
一方、前記苗載置台１側には、この苗浮上防止装置１７，１７を保持させる支持機構が構成される。その一実施例は、前記仕切り壁２の上面及び左右の側壁３の上面に上側支柱２２及び下側支柱２１を立設させ、これに上下相対向側が前記苗浮上防止装置１７の上下軸１９、１８を嵌入させる開口（ロ）（イ）を有した上下軸係止体２４、２３を取り付けている。そして、この上軸１９と下軸１８の間隔Ｌを上軸係止体２４と下軸係止体２３の開口（ロ）（イ）の奥部の間隔Ｍよりも若干広くし、下軸係止体２３及び上軸係止体２４の開口（イ）、（ロ）に下軸１８及び上軸１９を係合させて装着する場合に、浮上防止杆２０、２０…を上下に歪ませて係合させ、弾発状態で係止させる。したがって該苗浮上防止装置１７はガタづくことなく安定保持され、しかも、該苗浮上防止装置１７の全体を簡単に着脱できる。尚、上下軸係止体２４及び２３は樹脂材で構成し、その開口（イ）、（ロ）の形状を湾状の入り口部分を上下軸１９、１８の径よりやや小さくして変形させながら嵌入するよう構成すれば脱落防止になる。
【００１１】
上例の構成によれば、苗浮上防止装置１７を極めて容易に苗載置台１から取り外すことができて、田植え作業完了時の残り苗を取り出すことが簡単にでき、また、作業中においては、マット状苗Ｎのマットの浮上を確実に防止できる。
【００１２】
この発明の別の実施例について詳述すれば、図５のように上下軸係止体２４、２３に上下軸１９，１８を嵌入させる開口（ロ）（イ）を上下に複数段設けると、苗浮上防止装置１７の位置調整に便利である。
【００１３】
また、図６の通り、下軸係止体２３を上下調節式にしておくと、図示の通り苗茎ａ苗丈に適した調節ができる。
【００１４】
【発明の作用効果】
請求項１記載の発明は、左右往復移動しながら複数の移植装置（７）へ各々苗を供給する左右端の側壁（３）と仕切り壁（２）と苗床受底板（４）とで構成された苗載置台（１）に載せた複数のマット状苗（Ｎ）の浮き上がりを防止する複数の苗浮上防止装置（１７）を設けた田植機において、該各苗浮上防止装置（１７）は上端側に設けた上軸（１９）と下端側に設けた下軸（１８）とに下部直線部と下部直線部の両端から内向きに立上る傾斜部と外向きの上部直線部からなる略Ｕ字形の苗床浮上防止杆（２０）を固着して構成し、苗載置台（１）の左右端の側壁（３）と各仕切り壁（２）とに各々立設した上側支柱（２２）及び下側支柱（２１）の上部に相対向して切り欠いた開口（ロ、イ）を有した上下軸係止体（２４、２３）を設け、該上下軸係止体（２４、２３）の開口（ロ、イ）に複数の苗浮上防止装置（１７）の上軸（１９）と下軸（１８）とを苗浮上防止装置（１７）を変形させて各々各別に着脱自在に装着すると共に、苗床浮上防止杆（２０）の下部直線部の長さを前記上側支柱（２２）と下側支柱（２１）との距離と略同じに構成し、側面視で苗床浮上防止杆（２０）の下部直線部の上端を上側支柱（２２）の位置に位置させたことを特徴とする田植機としたものであるから、苗浮上防止装置（１７）を変形させて上軸（１９）と下軸（１８）とを相対向して切り欠いた開口（ロ）（イ）に装着することにより、苗浮上防止装置（１７）を簡単に且つしっかりと装着することができ、また、作業中においては、マット状苗（Ｎ）のマットの浮上を良好に防止できる。
【００１５】
また、複数の苗浮上防止装置（１７）のうち必要なものを変形させて簡単に取り外して、残り苗を取り出すことが容易に行えて、能率よく作業が行える。
請求項２記載の発明は、上下軸係止体（２４、２３）に上下軸（１９、１８）を嵌入させる開口（ロ、イ）が複数段形成されていることを特徴とする請求項１記載の田植機としたものであるから、請求項１記載の発明の作用効果に加えて、苗浮上防止装置（１７）の位置調節が容易に行えて、作業性が良い。
【図面の簡単な説明】
【図１】要部の側面図
【図２】要部の平面図
【図３】要部の斜面図
【図４】要部の斜面図
【図５】別例の要部の側面図
【図６】別例の要部の側面図
【符号の説明】
１ 苗載置台
７ 移植装置
１７ 苗浮上防止装置
１８ 下軸
１９ 上軸
２０ 苗床浮上防止杆
２３ 下軸係止体
２４ 上軸係止体
（イ）開口
（ロ）開口[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a rice transplanter provided with a mat-like seedling prevention device on a seedling mount.
[0002]
[Prior art]
Conventionally, as disclosed in JP-A-55-141112, JP-A-56-81616, JP-A-56-151415, etc., the nursery bed floating prevention device extends laterally on the upper side or the lower side thereof. It is a one-sided support fixed to the support shaft, and when the seedlings are supplied, the support shaft side is rotated upward with the support shaft side as a fulcrum. Moreover, sticking both the upper and lower sides has not been performed because it becomes difficult to replenish seedlings.
[0003]
[Problems to be solved by the invention]
In the above-mentioned prior art, when the nursery bed floats up, the nursery bed floating prevention hook part on the side opposite to the support shaft is at the free end, so it is deformed by the floating force of the nursery bed and accurate floating prevention cannot be performed. There were drawbacks. In addition, to prevent this deformation, the cocoon must be made thick, and if the cocoon has a large diameter, there is a drawback that the transfer resistance of the seedlings becomes large.
[0004]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the invention according to claim 1 is characterized in that the left and right side walls (3) , the partition wall (2), and the nursery bed that respectively supply seedlings to the plurality of transplanting devices (7) while reciprocating left and right. In each of the rice transplanters provided with a plurality of seedling lifting prevention devices (17) for preventing the lifting of the plurality of mat-like seedlings (N) placed on the seedling placing table (1) constituted by the base plate (4) , The seedling floating prevention device (17) includes an upper shaft (19) provided on the upper end side and a lower shaft (18) provided on the lower end side, and an inclined portion and an outer portion rising inward from both ends of the lower straight portion and the lower straight portion. An approximately U-shaped nursery bed levitating prevention ridge (20) consisting of an upper straight portion facing to each other is fixedly attached, and stands on the left and right side walls (3) and each partition wall (2) of the seedling mount (1). vertically having a set was the upper strut (22) and a lower strut (21) upper part opposite to outright-away opening (b, i) The engaging member (the 24, 23) is provided, the upper shaft of the opening of the upper and lower Jikugakaritometai (24, 23) (b, a) a plurality of seedling floating preventing device (17) (19) and the lower shaft (18 ) And the seedling floating prevention device (17) are deformed to be detachably attached to each other, and the length of the lower straight portion of the seedbed floating prevention hook (20) is set to the upper column (22) and the lower column ( 21) The rice transplanter is configured to be substantially the same as the distance to 21), and has the upper end of the lower straight portion of the nursery bed levitation prevention ridge (20) positioned at the position of the upper column (22) in a side view. , and the invention of claim 2, and characterized in that the opening to fit on under shaft (19, 18) in the vertical Jikugakaritometai (24, 23) (b, b) are a plurality of stages form The rice transplanter according to claim 1 is provided.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
Reference numeral 1 denotes a seedling mounting table equipped on the rice transplanter. The size of the seedling mounting table 1 varies depending on the number of planting strips of the rice transplanter, but the example of quadruple planting will be described in the figure. That is, the seedling mounting table 1 of the four-row planting rice transplanter is divided into right and left by the partition wall 2, and four mat-like seedlings N are formed by the side walls 3, 3 at the left and right ends, the partition walls 2, 2, and the seedbed bottom plate 4. Can be placed. In addition, a seedbed feed belt 5 is stretched by opening the bottom plate to each of the four other bottom plate portions. Generally, the seedling mounting table 1 is made of a synthetic resin.
[0006]
The seedling mounting table 1 is disposed on the upper side of the transplanter transmission case 6 of the rice transplanter, and is tilted so that the side of the planting device 7 is in the lower position to constitute the frame of the rice transplanter. -It is mounted on the side of the support 6 via the supports 8 and 8 so as to be movable left and right. The support 8 on the lower end side is integrally formed with the seedling receiving frame 9, and the side view is L-shaped so as to receive the lower end surface and the back surface of the mat portion of the mat-like seedling N to be placed. It is configured. The seedling receiving frame 9 is provided with a seedling separation port 10 through which a claw 7a of the planting tool of the planting device 7 intervenes from above. In the figure, reference numeral 6a designates a branch transmission case to which a planting device 7 extending from the transmission case 6 and extending rearward is mounted.
[0007]
Reference numeral 11 denotes a lateral movement shaft, which is operated by a lateral reciprocation lateral movement mechanism (not shown) in the transplanting part transmission case 6 and protrudes from the left and right sides of the case 6 to move laterally. To do. And this moving shaft 11 and the back side of the said seedling mounting stand 1 are connected through the interlocking rod 12 and the metal fitting 13.
Therefore, the mat-like seedling N mounted on the seedling mounting table 1 is reciprocated horizontally from side to side with the lower end of the mat being received by the seedling receiving frame 9, and the seedling N is sequentially fed out to the seedling separating port 10. It is. Then, the fed seedlings N are separated one by one by the nail 7a of the planting tool by the planting device 7 and planted in the lower farm scene.
[0008]
Reference numeral 14 in the figure denotes a link mechanism for attaching a rice transplanter to the traveling vehicle body (not shown) side. Reference numeral 15 denotes a front arm on which the leveling float 16 is mounted.
In the seedling mounting table 1 configured as described above, a seedling floating prevention device 17 that holds down the upper surface of the seedling mat that prevents the mat of the mat-like seedling N from rising or turning up is provided.
[0009]
As shown in FIG. 3, the seedling floating prevention device 17 includes a plurality of lower shafts 18 and upper shafts 19 each having a predetermined parallel interval in the vertical direction, and a plurality of U-shaped upper and lower intermediate portions recessed downward. It is in the form of mounting anti-floating rods 20, 20,. In this embodiment, the two mat-like seedlings N are prevented from floating, and the four-row planting type seedling mounting table 1 of the embodiment requires two seedling floating prevention devices 17.
[0010]
On the other hand, a support mechanism for holding the seedling floating prevention devices 17 and 17 is formed on the seedling mounting table 1 side. In one embodiment, the upper column 22 and the lower column 21 are erected on the upper surface of the partition wall 2 and the upper surfaces of the left and right side walls 3, and the upper and lower axes 19 of the seedling floating prevention device 17 are arranged on the upper and lower sides of the upper column 22 and the lower column 21. Vertical shaft locking bodies 24 and 23 having openings (b) and (b) for inserting 18 are attached. Then, slightly wider than the distance M of the inner part of the upper opening of the shaft 19 and lower shaft 18 upper shaft engaging a spacing L of the stop member 24 and the lower shaft holding member 23 (ii) (b), the lower shaft locking When the lower shaft 18 and the upper shaft 19 are engaged with the openings (b) and (b) of the stop body 23 and the upper shaft locking body 24 and mounted, the anti-levitation rods 20, 20. Engage and lock in the resilient state. Therefore, the seedling floating prevention device 17 is stably held without rattling, and the whole seedling floating prevention device 17 can be easily attached and detached. The vertical shaft locking bodies 24 and 23 are made of a resin material, and the openings (A) and (B) are deformed while the bay-shaped entrance portions are slightly smaller than the diameters of the vertical shafts 19 and 18. If it is configured to be inserted, it will be prevented from falling off.
[0011]
According to the configuration of the above example, the seedling floating prevention device 17 can be removed from the seedling mounting table 1 very easily, and the remaining seedling at the time of completion of the rice planting operation can be easily taken out. The floating of the mat of the mat-like seedling N can be reliably prevented.
[0012]
If described in detail another embodiment of the present invention, when Ru a plurality of stages of opening for fitting the upper and lower shaft 19, 18 (b) (i) up and down in the vertical Jikugakaritometai 24 and 23 as shown in FIG. 5 It is convenient for adjusting the position of the seedling floating prevention device 17 .
[0013]
Also, as in FIG. 6, when leaving the lower Jikugakaritometai 23 vertically adjustable, it can be adjusted suitable as Naekuki a seedling length shown.
[0014]
[Effects of the invention]
The invention according to claim 1 is composed of left and right side walls (3) , a partition wall (2), and a seedbed bottom plate (4) for supplying seedlings to a plurality of transplanting devices (7) while reciprocating left and right. In the rice transplanter provided with a plurality of seedling floating prevention devices (17) for preventing the floating of the plurality of mat-like seedlings (N) placed on the seedling mounting table (1) , each seedling floating prevention device (17) has an upper end. The upper shaft (19) provided on the side and the lower shaft (18) provided on the lower end side are substantially U comprising an inclined portion rising inward from both ends of the lower straight portion and the lower straight portion and an upper straight portion facing outward. The upper support column (22) and the lower support, each of which is formed by adhering a letter-shaped nursery-floating prevention rod (20) , standing on the left and right side walls (3) and the partition walls (2) of the seedling mount (1) opening notched to face the top of the side posts (21) (b, b) upper and lower Jikugakaritometai having a a (24, 23) provided Opening (B, A) of the upper and lower Jikugakaritometai (24, 23) on axes of a plurality of seedling floating preventing device (17) (19) and the lower shaft (18) seedling floating preventing device and (17) Each of them is deformed and detachably attached to each other, and the length of the lower straight part of the seedbed floating prevention ridge (20) is configured to be substantially the same as the distance between the upper column (22) and the lower column (21). Since the rice transplanter is characterized in that the upper end of the lower straight portion of the nursery bed floating prevention ridge (20) is located at the position of the upper column (22) in a side view , the seedling floating prevention device (17) the deforms the upper shaft (19) by mounting the lower shaft (18) and a phase opposite to outright lack openings (b) (i), seedling floating preventing device (17) easily and firmly can be mounted, also in the working, in good prevent floating mat mat Jonae (N) That.
[0015]
Further , necessary ones of the plurality of seedling floating prevention devices (17) can be deformed and easily removed, and the remaining seedlings can be easily taken out, so that the work can be performed efficiently.
According to a second aspect of the invention, claims, characterized in that the opening to fit on under shaft (19, 18) in the vertical Jikugakaritometai (24, 23) (b, b) are a plurality of stages form Since the rice transplanter described in 1 is used, in addition to the operational effects of the invention described in claim 1, the position of the seedling floating prevention device (17) can be easily adjusted, and the workability is good.
[Brief description of the drawings]
1 is a side view of the main part. FIG. 2 is a plan view of the main part. FIG. 3 is a slope view of the main part. FIG. 4 is a side view of the main part. 6] Side view of the main part of another example [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Seedling mounting base 7 Transplantation device 17 Seedling floating prevention device 18 Lower shaft 19 Upper shaft 20 Seedling bed floating prevention rod 23 Lower shaft locking body 24 Upper shaft locking body (A) Opening (B) opening