JP4290826B2

JP4290826B2 - Rotation transmission mechanism of seeding equipment for seedling box

Info

Publication number: JP4290826B2
Application number: JP29939399A
Authority: JP
Inventors: 晋渡辺; 仁黒子
Original assignee: 株式会社スズテック
Priority date: 1999-10-21
Filing date: 1999-10-21
Publication date: 2009-07-08
Anticipated expiration: 2019-10-21
Also published as: JP2001120015A

Description

【０００１】
【産業上の利用分野】
本発明は、育苗箱用播種装置の回転伝達機構に係るものである。
【０００２】
【従来技術】
従来公知の特開平１−２１５２１５号公報には、横軸種子繰出ロールとブラシに回転を伝達する構成が記載されている。
【０００３】
【発明が解決しようとする課題】
前記公知例は、不要なテンション機構を設けている点に課題がある。
即ち、チエンの掛け方を工夫すると、伝動機構を簡単にできる。
【０００４】
【発明の目的】
テンション機構の簡素化、コスト削減。
【０００５】
【課題を解決するための手段】
よって、本発明は、育苗容器２を移送する移送ベルト３を有する移送台１の上方位置に該移送台１に対して育苗容器２の移送方向に移動自在にフレーム６を設け、該フレーム６には、種子供給ホッパー８と外周面に繰出凹部１３を形成した横軸種子繰出ロール１２を有する種子供給装置７と、覆土供給ホッパー２２と横軸覆土繰出ロール２５を有する覆土供給装置２１と、モーター２７を設け、前記フレーム６側に設けたモーター２７の駆動歯車３０および前記横軸種子繰出ロール１２等に回転を伝達する歯車ならびに前記横軸覆土繰出ロール２５に回転伝達する覆土用歯車３９と、前記移送台１側に設けた移送ベルト３に回転を伝達する移送台側歯車３４との間に一本の無端状のチエン３１を掛け回し、前記モーター２７により前記横軸種子繰出ロール１２と前記横軸覆土繰出ロール２５と前記移送ベルト３を駆動するように構成し、前記フレーム６を移送台１に対して移動させることにより前記移送台側歯車３４と前記覆土用歯車３９との間の距離を変更して前記チエン３１の緊張程度を調節する構成とした育苗箱用播種装置の回転伝達機構としたものである。
【０００６】
【実施例】
本発明の一実施例を図面により説明すると、１は育苗容器２を移送する移送台であり、育苗容器２を移送する移送ベルト３を有し、前後一対設けた支脚４により床上に載置する。
移送台１の上方位置には、左右一対の側板５を有するフレーム６を設け、フレーム６の前記育苗容器２の移送方向後側（下手側）には、種子供給装置７を設ける。種子供給装置７は上部には種子供給ホッパー８を設け、種子供給ホッパー８の下部には倒八状の流穀板９、１０を設け、種子が落下しないように一方の流穀板９の先端を横軸種子繰出ロール１２の外周面に臨ませる。
横軸種子繰出ロール１２の外周面には、母線方向に平行な横条溝形状の繰出凹部１３を所望の間隔をおいて全周に形成する。繰出凹部１３は、種子が、横向き略１列に嵌合する幅に形成し、略一粒の種子が嵌合する深さに形成する。
【０００７】
横軸種子繰出ロール１２の外周面には左右方向に略一粒の種子の横向きの幅より短かい間隔をおいてスリット１４を全周に設ける。スリット１４の深さは繰出凹部１３と同じか若干深く形成し、各スリット１４には掻出用ナイフ１５を嵌合させる。
前記横軸種子繰出ロール１２の略上方位置には、軸心方向が該横軸種子繰出ロール１２の回転軸１６の軸心方向と平行で、かつ接触面において同方向回転する回転均平ブラシ１７を設け、繰出凹部１３に嵌合せずに前記横軸種子繰出ロール１２と共回りする過剰種子を掃き戻す。
【０００８】
前記回転均平ブラシ１７は、移動調節板１８にブラシ中心軸１９の左右両端部を軸着し、移動調節板１８の上部を種子供給装置７の側板５にボルトにより上下調節自在に取付ける。
２０は横軸種子繰出ロール１２の側部に設けた種子誘導カバーであり、繰出凹部１３に嵌合した種子を種子誘導カバー２０により下方迄誘導し、最下点で下方に落下させる。
しかして、前記フレーム６の前側（上手側）には、覆土供給装置２１を設ける。覆土供給装置２１は上部には覆土供給ホッパー２２を設け、覆土供給ホッパー２２の下部には倒八状の傾斜板２３、２４を設け、傾斜板２３、２４の下部に横軸覆土繰出ロール２５を設ける。横軸覆土繰出ロール２５の外周面には、母線方向に平行な横条溝形状の繰出凹部２６を所望の間隔をおいて全周に形成する。
【０００９】
しかして、側板５にはモーター２７を取付けると共に、横軸種子繰出ロール１２の回転軸１６と前記横軸覆土繰出ロール２５の回転軸２８とブラシ中心軸１９とを軸装し、各軸に設けた歯車にチエンを掛け回して回転を伝達するが、モーター２７の駆動軸２９に固定の駆動歯車３０に掛け回した第１チエン３１は、前記移送台１の移送ベルト３のローラ３２のローラ回転軸３３に固定した移送台側歯車３４に掛け回し、前記側板５を移送台１に対して前後に移動させることにより第１チエン３１を緊張させるようにしてテンション機構を構成する。
３５は第１中間歯車、３６は第２中間歯車、３７は第１中間歯車３５の第１中間軸、３８は前記第２中間歯車３６を設けた第２中間軸であり、前記駆動歯車３０と第１中間歯車３５と第２中間歯車３６と前記覆土用歯車３９との間に第１チエン３１を掛け回す。
【００１０】
また、第２中間軸３８には別の第３中間歯車４０を設け、前記横軸種子繰出ロール１２の回転軸１６に設けた軸受部材４１に固定の第４中間歯車４２との間に第２チエン４３を掛け回す。前記軸受部材４１は回転軸１６に回転のみ自在に設け、軸受部材４１には別の第５中間歯車４４を設け、第５中間歯車４４には前記ブラシ中心軸１９に固定のブラシ用歯車４５との間にブラシ用チエン４６を掛け回す。
また、第２中間軸３８の他端には歯数の相違する駆動歯車５０を複数固定し、前記回転軸１６の他端に設けた歯数の相違する複数の受動歯車５１との間にチエン５２を選択的に掛け回す。５３はテンション歯車である。
５４は育苗容器２の周壁上面の覆土を除去する仕上げブラシ、５５は種子受け箱、５６は折り畳み補助台、５７はスイッチである。
【００１１】
【作用】
次に作用を述べる。
種子供給ホッパー８に種子を投入し、覆土供給装置２１の覆土供給ホッパー２２に覆土を投入し、モーター２７をオンにすると、モーター２７の回転は、
駆動軸２９→駆動歯車３０→第１チエン３１→移送台側歯車３４→ローラ回転軸３３→ローラ３２
と伝達されて、移送台１の移送ベルト３を作動させる。
また、モーター２７の回転は、
駆動軸２９→駆動歯車３０→第１チエン３１→第２中間歯車３６→第２中間軸３８→駆動歯車５０→チエン５２→受動歯車５１→回転軸１６
と伝達されて、横軸種子繰出ロール１２を回転させる。
また、モーター２７の回転は、
駆動軸２９→駆動歯車３０→第１チエン３１→第２中間歯車３６→第２中間軸３８→第３中間歯車４０→第２チエン４３→第４中間歯車４２→軸受部材４１→第５中間歯車４４→ブラシ用チエン４６→ブラシ用歯車４５
と伝達されて、回転均平ブラシ１７を回転させる。
【００１２】
この場合、側板５に設けたモーター２７の駆動歯車３０と横軸種子繰出ロール１２等に回転を伝達する歯車に掛け回した第１チエン３１は、移送台１の移送ベルト３に回転を伝達する移送台側歯車３４に掛け回し、前記側板５は移送台１に対して前後移動可能にしているから、側板５を移送台１に対して移動させることにより第１チエン３１を緊張させることができる。
即ち、側板５側の歯車と移送台１側の歯車の間に第１チエン３１を掛け回しているから、側板５を移動させることにより、第１チエン３１の緊張程度を調節できる。したがって、テンション機構を簡単に構成する。
また、回転軸１６に回転自在の軸受部材４１を設け、軸受部材４１に第４中間歯車４２と第５中間歯車４４を設けているから、横軸種子繰出ロール１２と、回転均平ブラシ１７とは回転数を相違させて回転させることができ、かつ回転軸１６を、横軸種子繰出ロール１２の中心軸と、回転均平ブラシ１７に回転を伝動させる中間軸とに兼用する構成にすることができる。
【００１３】
しかして、種子供給ホッパー８内の種子は流穀板上を流下して横軸種子繰出ロール１２の繰出凹部１３に嵌合し、横軸種子繰出ロール１２の回転により上昇し、横軸種子繰出ロール１２と共回りする繰出凹部１３に嵌合していない過剰種子は、回転均平ブラシ１７により戻される。
したがって、回転均平ブラシ１７の下方を通過した繰出凹部１３には、横一列に種子が嵌合し、種子誘導カバー２０により下方迄誘導され、最下点で下方に落下し、正確に一定量の種子が育苗箱内に播種される。
また、駆動歯車５０と受動歯車５１を選択してチエン５２を掛け変えることにより横軸種子繰出ロール１２の回転数を変更して播種量の調節をすることができる。
【００１４】
【効果】
本発明は、育苗容器２を移送する移送ベルト３を有する移送台１の上方位置に該移送台１に対して育苗容器２の移送方向に移動自在にフレーム６を設け、該フレーム６には、種子供給ホッパー８と外周面に繰出凹部１３を形成した横軸種子繰出ロール１２を有する種子供給装置７と、覆土供給ホッパー２２と横軸覆土繰出ロール２５を有する覆土供給装置２１と、モーター２７を設け、前記フレーム６側に設けたモーター２７の駆動歯車３０および前記横軸種子繰出ロール１２等に回転を伝達する歯車ならびに前記横軸覆土繰出ロール２５に回転伝達する覆土用歯車３９と、前記移送台１側に設けた移送ベルト３に回転を伝達する移送台側歯車３４との間に一本の無端状のチエン３１を掛け回し、前記モーター２７により前記横軸種子繰出ロール１２と前記横軸覆土繰出ロール２５と前記移送ベルト３を駆動するように構成し、前記フレーム６を移送台１に対して移動させることにより前記移送台側歯車３４と前記覆土用歯車３９との間の距離を変更して前記チエン３１の緊張程度を調節する構成とした育苗箱用播種装置の回転伝達機構としたものであるから、フレーム６を移送台１に対して移動させることによりチエン３１を緊張程度を調節することができ、チエン３１を緊張させるテンションローラを省略してコストを低くする。
【図面の簡単な説明】
【図１】側面図。
【図２】種子供給装置と覆土供給装置部分の断面図。
【図３】伝動機構斜視図。
【図４】伝動機構の右側面図。
【図５】図４の一部を省略して伝動機構のみ示した右側面図。
【図６】伝動機構の左側面図。
【符号の説明】
１…移送台、２…育苗容器、３…移送ベルト、４…支脚、５…側板、６…フレーム、７…種子供給装置、８…種子供給ホッパー、９…流穀板、１２…横軸種子繰出ロール、１３…繰出凹部、１４…スリット、１５…掻出用ナイフ、１６…回転軸、１７…回転均平ブラシ、１８…移動調節板、１９…ブラシ中心軸、２０…種子誘導カバー、２１…覆土供給装置、２２…覆土供給ホッパー、２５…横軸覆土繰出ロール、２６…繰出凹部、２８…回転軸、２９…駆動軸、３０…駆動歯車、３１…第１チエン、３２…ローラ、３３…ローラ回転軸、３４…移送台側歯車、３５…第１中間歯車、３６…第２中間歯車、３７…第１中間軸、３８…第２中間軸、４０…第３中間歯車、４１…軸受部材、４２…第４中間歯車、４３…第２チエン、４４…第５中間歯車、４５…ブラシ用歯車、４６…ブラシ用チエン、５０…駆動歯車、５１…受動歯車、５２…チエン、５３…テンション歯車。[0001]
[Industrial application fields]
The present invention relates to a rotation transmission mechanism of a seedling box seeding device.
[0002]
[Prior art]
The known JP 1-215215 discloses a configuration for transmitting the rotation to the horizontal axis seed feed roll and brush is described.
[0003]
[Problems to be solved by the invention]
The known example has a problem in that an unnecessary tension mechanism is provided.
In other words, if the chain is devised, the transmission mechanism can be simplified.
[0004]
OBJECT OF THE INVENTION
Simplification of tension mechanism and cost reduction.
[0005]
[Means for Solving the Problems]
Therefore, in the present invention , a frame 6 is provided above the transfer table 1 having the transfer belt 3 for transferring the seedling container 2 so as to be movable in the transfer direction of the seedling container 2 with respect to the transfer table 1. Includes a seed supply hopper 8, a seed supply device 7 having a horizontal axis seed supply roll 12 having a supply recess 13 formed on the outer peripheral surface, a soil cover supply device 21 having a soil cover supply hopper 22 and a horizontal axis cover soil supply roll 25, and a motor. 27, a gear for transmitting rotation to the drive gear 30 of the motor 27 provided on the frame 6 side, the horizontal axis seed feeding roll 12 and the like, and a soil covering gear 39 for transmitting rotation to the horizontal axis covering roll 25 . wound around the endless chain 31 of the one between the transfer table side gear 34 for transmitting rotation to the transfer belt 3 which is provided on the transfer table 1 side, the horizontal axis species by the motor 27 The feeding roll 12, the horizontal shaft covering roll 25 and the transfer belt 3 are driven, and the frame 6 is moved with respect to the transfer table 1 to move the transfer table side gear 34 and the soil covering gear 39. The rotation transmission mechanism of the seedling box seeding device is configured to adjust the tension degree of the chain 31 by changing the distance between them.
[0006]
【Example】
An embodiment of the present invention will be described with reference to the drawings. Reference numeral 1 denotes a transfer stand for transferring a seedling container 2, which has a transfer belt 3 for transferring the seedling container 2, and is placed on the floor by a pair of front and rear support legs 4. .
A frame 6 having a pair of left and right side plates 5 is provided above the transfer table 1, and a seed supply device 7 is provided on the rear side (lower side) of the seedling container 2 in the frame 6 in the transfer direction. The seed supply device 7 is provided with a seed supply hopper 8 in the upper part, and in the lower part of the seed supply hopper 8 is provided with inverted octagonal cereal boards 9 and 10 so that the seeds do not fall off. On the outer peripheral surface of the horizontal axis seed feeding roll 12.
On the outer peripheral surface of the horizontal axis seed feeding roll 12, a feeding groove-shaped feeding recess 13 parallel to the generatrix direction is formed on the entire circumference at a desired interval. The feeding recess 13 is formed in such a width that the seeds are fitted in approximately one row in the horizontal direction, and is formed to a depth in which approximately one seed is fitted.
[0007]
On the outer peripheral surface of the horizontal axis seed feeding roll 12, slits 14 are provided on the entire circumference at intervals shorter than the lateral width of approximately one seed in the left-right direction. The depth of the slit 14 is the same as or slightly deeper than that of the feeding recess 13, and a scraping knife 15 is fitted in each slit 14.
At a position substantially above the horizontal axis seed feeding roll 12, a rotating leveling brush 17 whose axial center direction is parallel to the axial direction of the rotating shaft 16 of the horizontal axis seed feeding roll 12 and rotates in the same direction on the contact surface. The excess seeds rotating together with the horizontal axis seed feeding roll 12 without being fitted into the feeding recess 13 are swept back.
[0008]
The rotating leveling brush 17 is attached to the movement adjusting plate 18 at both left and right ends of the brush center shaft 19 and the upper portion of the movement adjusting plate 18 is attached to the side plate 5 of the seed supply device 7 so as to be adjustable up and down by bolts.
Reference numeral 20 denotes a seed guiding cover provided on the side of the horizontal axis seed feeding roll 12. The seed fitted in the feeding recess 13 is guided downward by the seed guiding cover 20 and dropped downward at the lowest point.
Thus, a soil covering supply device 21 is provided on the front side (upper side) of the frame 6. The soil covering supply device 21 is provided with a soil covering supply hopper 22 at the upper portion, and has eight inclined plates 23 and 24 at the lower portion of the soil covering supply hopper 22, and a horizontal shaft covering soil feed roll 25 is disposed below the inclined plates 23 and 24. Provide. On the outer peripheral surface of the horizontal axis covering soil feed roll 25, a horizontal groove-shaped feed recess 26 parallel to the generatrix direction is formed on the entire circumference at a desired interval.
[0009]
Thus, the motor 27 is attached to the side plate 5, and the rotary shaft 16 of the horizontal axis seed feeding roll 12, the rotary shaft 28 of the horizontal shaft covering roll 25 and the brush center shaft 19 are mounted on each side shaft. The first chain 31 wound around the drive gear 30 fixed to the drive shaft 29 of the motor 27 is rotated by the roller 32 of the transfer belt 3 of the transfer table 1. The tension mechanism is configured so that the first chain 31 is tensioned by being wound around the transfer table side gear 34 fixed to the shaft 33 and moving the side plate 5 back and forth with respect to the transfer table 1.
35 is a first intermediate gear, 36 is a second intermediate gear, 37 is a first intermediate shaft of the first intermediate gear 35, 38 is a second intermediate shaft provided with the second intermediate gear 36, The first chain 31 is wound around the first intermediate gear 35, the second intermediate gear 36 and the soil covering gear 39.
[0010]
Further, another third intermediate gear 40 is provided on the second intermediate shaft 38, and a second intermediate gear 40 is fixed between the fourth intermediate gear 42 fixed to the bearing member 41 provided on the rotary shaft 16 of the horizontal axis seed feeding roll 12. Multiply the chain 43. The bearing member 41 is provided on the rotary shaft 16 so as to be rotatable only. The bearing member 41 is provided with another fifth intermediate gear 44. The fifth intermediate gear 44 has a brush gear 45 fixed to the brush center shaft 19. The brush chain 46 is hung around.
In addition, a plurality of drive gears 50 having different numbers of teeth are fixed to the other end of the second intermediate shaft 38, and a chain between a plurality of passive gears 51 having different numbers of teeth provided on the other end of the rotary shaft 16 is provided. 52 is selectively multiplied. 53 is a tension gear.
Reference numeral 54 denotes a finishing brush for removing soil covering from the upper surface of the peripheral wall of the seedling raising container 2, reference numeral 55 denotes a seed receiving box, reference numeral 56 denotes a folding auxiliary base, and reference numeral 57 denotes a switch.
[0011]
[Action]
Next, the operation will be described.
When seeds are introduced into the seed supply hopper 8, soil is introduced into the soil covering supply hopper 22 of the soil covering supply device 21, and the motor 27 is turned on, the rotation of the motor 27 is
Drive shaft 29 → drive gear 30 → first chain 31 → transfer base side gear 34 → roller rotating shaft 33 → roller 32
And the transfer belt 3 of the transfer table 1 is operated.
The rotation of the motor 27 is
Drive shaft 29 → drive gear 30 → first chain 31 → second intermediate gear 36 → second intermediate shaft 38 → drive gear 50 → chain 52 → passive gear 51 → rotating shaft 16
And the horizontal axis seed feeding roll 12 is rotated.
The rotation of the motor 27 is
Drive shaft 29 → drive gear 30 → first chain 31 → second intermediate gear 36 → second intermediate shaft 38 → third intermediate gear 40 → second chain 43 → fourth intermediate gear 42 → bearing member 41 → fifth intermediate gear 44 → Chain 46 for brush → Gear 45 for brush
And the rotating leveling brush 17 is rotated.
[0012]
In this case, the first chain 31 wound around a gear that transmits rotation to the drive gear 30 of the motor 27 and the horizontal axis seed feeding roll 12 provided on the side plate 5 transmits the rotation to the transfer belt 3 of the transfer table 1. Since the side plate 5 is hung around the transfer table side gear 34 so that the side plate 5 can move back and forth with respect to the transfer table 1, the first plate 31 can be tensioned by moving the side plate 5 with respect to the transfer table 1. .
That is, since the first chain 31 is hung between the gear on the side plate 5 side and the gear on the transfer table 1 side, the degree of tension of the first chain 31 can be adjusted by moving the side plate 5. Therefore, the tension mechanism is simply configured.
Further, since the rotatable bearing member 41 is provided on the rotating shaft 16 and the fourth intermediate gear 42 and the fifth intermediate gear 44 are provided on the bearing member 41, the horizontal axis seed feeding roll 12, the rotating leveling brush 17, and the like. The rotary shaft 16 can be rotated at different rotational speeds, and the rotary shaft 16 is used as both the central axis of the horizontal axis seed feeding roll 12 and the intermediate shaft that transmits the rotation to the rotary leveling brush 17. Can do.
[0013]
Thus, the seeds in the seed supply hopper 8 flow down on the drifted cereal board, fit into the feeding recess 13 of the horizontal axis seed feeding roll 12, rise as the horizontal axis seed feeding roll 12 rotates, and feed the horizontal axis seed. Excess seed that is not fitted in the feeding recess 13 that rotates together with the roll 12 is returned by the rotating leveling brush 17.
Accordingly, the seeds are fitted in a horizontal row in the feeding recess 13 that has passed under the rotating leveling brush 17 and guided downward by the seed guide cover 20 and dropped downward at the lowest point, so that a certain amount is accurately measured. Seeds are sown in seedling boxes.
Further, by selecting the drive gear 50 and the passive gear 51 and changing the chain 52, the rotational speed of the horizontal axis seed feeding roll 12 can be changed to adjust the sowing amount.
[0014]
【effect】
In the present invention , a frame 6 is provided above the transfer table 1 having a transfer belt 3 for transferring the seedling container 2 so as to be movable in the transfer direction of the seedling container 2 with respect to the transfer table 1. A seed supply device 7 having a seed supply hopper 8, a horizontal axis seed supply roll 12 having a supply recess 13 formed on the outer peripheral surface, a soil covering supply device 21 having a soil cover supply hopper 22 and a horizontal shaft cover roll 25, and a motor 27. And a gear for transmitting rotation to the drive gear 30 of the motor 27 provided on the frame 6 side, the horizontal axis seed feeding roll 12 and the like, and a soil covering gear 39 for transmitting rotation to the horizontal axis covering roll 25, and the transfer wound around the endless chain 31 of the one between the transfer table side gear 34 for transmitting rotation to the transfer belt 3 which is provided to the base 1 side, the horizontal axis seed feeding b by the motor 27 14, the horizontal shaft covering roll 25 and the transfer belt 3 are driven, and the frame 6 is moved with respect to the transfer table 1 to move the transfer table side gear 34 and the cover gear 39. Since the rotation transmission mechanism of the seedling box seeding device is configured to adjust the degree of tension of the chain 31 by changing the distance between them, the chain 6 can be moved by moving the frame 6 relative to the transfer table 1. 31 can adjust the degree of tension, omitting the tension roller for tensioning the chain 31, thereby reducing the cost.
[Brief description of the drawings]
FIG. 1 is a side view.
FIG. 2 is a cross-sectional view of a seed supply device and a soil covering supply device portion.
FIG. 3 is a perspective view of a transmission mechanism.
FIG. 4 is a right side view of the transmission mechanism.
FIG. 5 is a right side view in which only a transmission mechanism is shown with a part of FIG. 4 omitted.
FIG. 6 is a left side view of the transmission mechanism.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Transfer stand, 2 ... Seedling container, 3 ... Transfer belt, 4 ... Support leg, 5 ... Side plate, 6 ... Frame, 7 ... Seed supply device, 8 ... Seed supply hopper, 9 ... Dried cereal board, 12 ... Horizontal axis seed Feeding roll, 13 ... feeding recess, 14 ... slit, 15 ... scraping knife, 16 ... rotating shaft, 17 ... rotating leveling brush, 18 ... moving adjustment plate, 19 ... brush center axis, 20 ... seed guide cover, 21 DESCRIPTION OF SYMBOLS ... Soil covering supply apparatus, 22 ... Covering soil supply hopper, 25 ... Horizontal axis covering soil feed roll, 26 ... Feeding recessed part, 28 ... Rotating shaft, 29 ... Drive shaft, 30 ... Drive gear, 31 ... 1st chain, 32 ... Roller, 33 ... Roller rotating shaft 34... Transfer base side gear 35. First intermediate gear 36. Second intermediate gear 37. First intermediate shaft 38. Second intermediate shaft 40. Member, 42 ... fourth intermediate gear, 43 ... second chain, 44 ... fifth Gear, 45 ... gear brushes, 46 ... chain brush, 50 ... driving gear, 51 ... driven gear, 52 ... chain, 53 ... tension gear.

Claims

A frame 6 is provided above the transfer table 1 having a transfer belt 3 for transferring the seedling container 2 so as to be movable in the transfer direction of the seedling container 2 with respect to the transfer table 1, and the frame 6 has a seed supply hopper 8. A seed feeding device 7 having a horizontal axis seed feeding roll 12 having a feeding recess 13 formed on the outer peripheral surface, a soil covering supply device 21 having a soil covering supply hopper 22 and a horizontal shaft covering soil feeding roll 25, and a motor 27. A gear 27 for transmitting rotation to the drive gear 30 of the motor 27 provided on the side 6, the horizontal axis seed feeding roll 12, etc., a soil covering gear 39 for transmitting rotation to the horizontal axis covering roll 25, and the transfer table 1 side. wound around the single endless chain 31 between the transfer table side gear 34 for transmitting rotation to the transfer belt 3 which is provided, with the horizontal axis seed feed roll 12 by the motor 27 The horizontal axis soil covering roll 25 and the transfer belt 3 are driven, and the frame 6 is moved with respect to the transfer table 1 to move between the transfer table side gear 34 and the soil covering gear 39. A rotation transmission mechanism of a seedling box seeding device configured to adjust the degree of tension of the chain 31 by changing the distance .