JP2013009614A - Riding type rice transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a riding type rice transplanter which smoothly moves mat-like seedlings by a preliminary seedling placing unit to prevent the mat-like seedlings placed in a rear end position from moving forward.SOLUTION: The riding type rice transplanter includes three preliminary seedling tables Ca linearly in the front and rear direction, wherein rollers R for smoothly sending a seedling box backward in which the mat-like seedlings are stored. The roller R of the preliminary seedling table Ca in the rear end includes a one-way clutch 43 for preventing a rotation in the direction which prevents the seedling box from moving forward.

Description

  The present invention relates to a riding type rice transplanter provided with a preliminary seedling placement unit capable of placing a plurality of mat-like seedlings arranged in a straight line in the front-rear direction at a front position of a traveling machine body.

  As a riding type rice transplanter configured as described above, Patent Document 1 includes a plurality of seedling receiving plates at the front position of the traveling machine body, and one of the middle seedling receiving plates among the plurality of seedling receiving plates. The upper seedling receiving plate is supported at the end of the center so as to be swingable about a laterally oriented axis, and the other end of the middle seedling receiving plate is swingable about the axial center of the laterally oriented posture. Describes a preliminary seedling placement unit (in the literature, a preliminary seedling accommodation structure) that supports a lower seedling receiving plate.

  In this preliminary seedling placement unit, a first form in which respective seedling receiving plates are arranged in a plurality of stages in a vertical direction so as to form a shelf, and an upper seedling receiving plate and a lower seedling with respect to the middle seedling receiving plate By expanding the receiving plate by swinging, it is configured to be switchable to a second form in which a plurality of seedling receiving plates are arranged in series at the same level.

  In this patent document 1, when the preliminary seedling accommodation structure is set to the second form, a plurality of seedling receiving plates are arranged in the front-rear direction. For example, in a state where the front end side of the traveling machine body is brought close to the heel and stopped. The mat-like seedlings are sent to the seedling receiving plate at the front end position, moved to the rear side of the machine so that the upper surface of the plurality of seedling receiving plates slides, and the work to supply from the rear end position to the seedling mounting stand of the seedling planting device is easy Can be done.

JP 2007-135506 A

  When mat-like seedlings are placed on the spare seedling placement unit, in order to improve the handling of mat-like seedlings, mat-like seedlings that have been placed in a seedling box or placed on a seedling rake plate Will be placed. Accordingly, in the rice transplanter described in Patent Document 1, the seedling receiving plate is moved to the rear of the machine body in a form in which a nursery box or the like is slid on the upper surfaces of the plurality of seedling receiving plates. A configuration is also conceivable in which a plurality of rollers are rotatably provided on the mounting portion (upper surface) of the above and a nursery box or the like is smoothly moved like a roller conveyor.

  When planting with the rice transplanter having the configuration of Patent Document 1, the preliminary seedling placement unit is set to the second form, for example, a mat that is housed in a nursery box with respect to each seedling receiving plate Work may be performed with the seedlings placed. When working in this way, the remaining number of mat-like seedlings prepared for planting work is reduced, and only one mat-like seedling stored in the seedling box is placed on the spare seedling placement unit. Sometimes it is done.

  When only one mat-like seedling housed in the nursery box is placed on the placement portion in this way, when the traveling machine body is inclined or when the traveling machine body vibrates, the mat-like seedling is moved in the front-rear direction. There is room for improvement because it becomes difficult to carry out the work of supplying the mat-like seedlings to the seedling stage. In addition, when the mattress seedling housed in the nursery box is supplied to the seedling mounting stage of the seedling planting device, the operator of the driver seat scoops the mat seedling with the plate seedling scooping plate. However, when this work is performed, if the seedling scooping plate is inserted into the seedling box from the rear to the front, the seedling box will move forward at the placement portion, and the position of the seedling box will be The work was not stable and it was difficult to work.

  The objective of this invention exists in the point which comprises rationally the riding type rice transplanter which suppresses the movement to the front of the body of the mounting object mounted in a mounting part, and makes it easy to work.

  A feature of the present invention is a riding type rice transplanter provided with a spare seedling placement unit capable of placing a plurality of mat-like seedlings in a line in the front-rear direction at a front position of a traveling machine body, The seedling placement unit is provided with a placement portion on which placement objects such as the mat-like seedling, the seedling box, and the seedling rake plate are placed, and the above-mentioned placement object is moved forward of the machine body at a rear position of the placement portion. It is in the point provided with the reverse feed prevention means which stops.

According to this configuration, when the placement object is placed at the rear position of the placement part, the movement of the placement object to the front of the machine body is prevented by the reverse feed prevention means, and the traveling machine body is inclined. Even when the operator touches the case, the placed object at the rear position does not move forward. In other words, the rear seedling box containing the mat-like seedlings is placed on the placement part, and the mat-like seedlings are fed from the seedling raising box to the seedling seedling stand with the seedling scooping plate from the position of the driver seat. The nursery box at the position does not move forward and the position is determined, so that the mat-like seedling can be easily picked up.
As a result, a riding-type rice transplanter that makes it easier to perform work by suppressing the movement of the placed object placed at the rear position of the placing part to the front of the machine body has been rationally configured.

  In the present invention, the reverse feed blocking means may be provided in a state in which it acts on at least the most rearmost mounted object among the previously described objects mounted on the previously described mounting part.

  According to this, the back feed prevention means prevents the movement of the placement object placed on the rearmost part of the placement part to the front of the machine body. That is, the rearmost one is always prevented from moving forward by the reverse feed preventing means, and the workability is improved.

  In the present invention, the preliminary seedling placement unit has a laterally oriented shaft core so as to allow movement of the above-mentioned figurine by rotating in contact with the lower surface of the above-mentioned figurine placed on the above-mentioned placement section. A plurality of rollers rotatably supported around the center, and the reverse feed prevention means allows the figurine to move rearward at the rear position of the placement unit, and forwards the figurine A one-way clutch that restricts the rotation of the roller so as to prevent movement of the roller may be used.

  According to this, when a moving force is applied to the placed object placed at the front position of the placed part toward the rear of the machine body, the placed object is easily moved by the rotation of the roller. After the placement reaches the rear position of the placement portion due to this movement, even when a force to move forward acts on the placement matter, the one-way clutch prevents rotation of the roller, Can be held in the rear position.

  In the present invention, the preliminary seedling placement unit has a configuration in which a plurality of preliminary seedling placement platforms are arranged linearly in the front-rear direction, and the one-way clutch is disposed on one of the preliminary seedling placement tables at the rear end position. It may be provided to limit the rotation of the provided roller.

  According to this, since the preliminary seedling placement unit is configured by arranging a plurality of preliminary seedling placement platforms in the front-rear direction, a plurality of preliminary seedling placements can be achieved without using a large member on which a plurality of placement objects can be placed. A preliminary seedling placement unit can be configured simply by arranging the stands linearly. In addition, by placing a one-way clutch so as to limit the rotation of the roller provided in the spare seedling stage placed at the rear position among the plurality of preliminary seedling stage, it is placed at the rear position of the preliminary seedling placement unit. It is possible to prevent the mounted object from moving forward.

  In the present invention, a slip suppression portion that suppresses the slip of the figurine described above that contacts the outer peripheral surface of the roller may be formed on the outer peripheral surface of the roller whose rotation is limited by the one-way clutch.

  According to this, in the state where the mounted object is in contact with the outer peripheral surface of the roller whose rotation is restricted by the one-way clutch, when a force that moves the mounted object acts on the front of the machine body, the slip suppression unit is It is possible to suppress the phenomenon of sliding forward in a state where the mat-like seedling is in contact with the mat, and to further prevent the mat-like seedling from moving forward.

  According to the present invention, the reverse feed prevention means prevents the forward movement of the above-mentioned figurine placed on the above-mentioned placement unit by allowing the backward movement of the above-mentioned figurine and the forward movement of the aircraft by contacting the above-mentioned figurine. It may be configured by a stopper that can be switched to a contact posture.

  According to this configuration, when the stopper is in the allowable posture, the placed object can be fed to the rear position, and when the stopper is in the contact posture, the placed object at the rear position is about to move forward. The stopper is brought into contact with the placement object to reliably prevent the placement object from moving forward.

It is a side view of the whole riding rice transplanter. It is a top view of the whole riding rice transplanter. It is the side view of the whole riding type rice transplanter of the state which developed the reserve seedling stand. It is a top view of the whole riding type rice transplanter of the state which developed the preliminary seedling mounting stand. It is a front view of the preliminary seedling stage in the overlapping posture It is a top view of a preliminary seedling stage. It is a vertical side view of a preliminary seedling stage. It is sectional drawing of the site | part to which the fall prevention member of the preliminary seedling mounting stand was attached. It is sectional drawing of the site | part to which the fall prevention member of the preliminary seedling mounting stand was attached. It is a perspective view which shows the shape of a drop-off prevention member. It is a vertical side view of the preliminary seedling stage having a roller with a one-way clutch. It is a vertical front view of the preliminary seedling stage having a roller with a one-way clutch. It is sectional drawing of the roller provided with the one way clutch. It is a vertical front view which shows the reverse feed prevention means of another embodiment (a). It is a vertical side view which shows the reverse feed prevention means of another embodiment (a). It is a vertical side view which shows the reverse feed prevention means of another embodiment (c).

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
〔overall structure〕
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 to 4, a driving seat 3 is arranged in the center of a traveling machine body A having a pair of left and right front wheels 1 and a pair of left and right rear wheels 2, and a link mechanism is provided at the rear end of the traveling machine body A. The seedling planting apparatus B is connected via L so that the seedling planting apparatus B can freely move up and down, and a spare seedling placement unit C is provided on both sides of the front position of the traveling machine body A to constitute a riding type rice transplanter.

  This riding type rice transplanter includes a mission case 5 in which an engine E is disposed inside a bonnet 4 at the front of a traveling machine body A, and power from the engine E is transmitted below the engine E. A work transmission system that includes a traveling drive system that transmits to the left and right front wheels 1 and the left and right rear wheels 2 and that transmits a driving force synchronized with the traveling speed of the traveling machine body A to the seedling planting device B via the external output shaft 6. It has.

  A steering wheel 7 for steering the left and right front wheels 1 is disposed at a front position of the driver seat 3, and a main transmission lever 8 is disposed on the left side of the steering wheel 7, in the vicinity of the driver seat 3. Is provided with an elevating lever 9 for elevating the seedling planting device B and for intermittently connecting a planting clutch (not shown) built in the mission case 5.

  The link mechanism L includes a plurality of link members 11 and a hydraulic lift cylinder 12 that lifts and lowers the seedling planting apparatus B by the expansion and contraction operation of the lift cylinder 12.

  The seedling planting apparatus B includes a plurality of leveling floats 14, a seedling stage 15 on which a mat-like seedling W (an example of a placement object) is placed, and a seedling from the mat-like seedling W placed on the seedling stage 15. A plurality of rotary planting mechanisms 16 are provided so as to be cut out and planted in a farm scene. With this configuration, during seedling planting work, a plurality of leveling floats 14 level the muddy surface of the seedling planting site as the traveling machine A travels, while the seedling mounting table 15 is moved left and right by the driving force transmitted from the external output shaft 6. A reciprocating operation is performed with a constant stroke in the direction, and during this reciprocating operation, a planting operation is performed in which the planting mechanism 16 cuts out a predetermined amount of seedlings from the lower end of the mat-like seedling W of the seedling mount 15 and plantes them in the field.

  A step 21 is formed at a position below the driver's seat 3, and a boarding floor 22 that reaches the front end position of the traveling machine body A is formed on both the left and right sides of the bonnet 4 so as to continue to the step 21. Further, an expansion step 23 having the same level as these is provided outside the step 21 and the boarding floor 22.

  An auxiliary step 24 is provided at the front end position of the traveling machine body A so as to be switchable between a protruding position projecting forward from the front end of the traveling machine body A and a storage position stored in the front end portion of the traveling machine body A. The auxiliary step 24 is set at the protruding position so that an operator can get on the upper surface and easily get on the boarding floor 22. The telescopic frame 24 A connected to the auxiliary step 24 is provided on the traveling machine body A. By being supported so as to be retractable with respect to the front position, it is possible to switch between the protruding position and the storage position.

  In addition, the front end surface 24S of the auxiliary step 24 is formed in an inclined posture toward the rear as it goes down, and the angle θ formed by the front end surface 24S and the horizontal plane is made to coincide with the formation angle when forming the wrinkles with a wrinkle coater. ing. Since the front end surface 24S uses a steel plate having a thickness of about several millimeters in order to suppress deformation by contact with the heel, the auxiliary step 24 functions as a balance weight to improve the front-rear balance of the traveling machine body A. . By setting the angle θ in this manner, even when the traveling machine body A approaches the kite and contacts the kite, it is possible to perform an operation that hardly destroys the shape of the kite.

[Preliminary seedling placement unit]
A support frame 25 that is vertically oriented is provided outside the bonnet 4 at both outer positions of the boarding floor 22, and the reserve seed placement unit C is configured by providing the support frame Ca to the support frame 25. Has been. As shown in FIGS. 1, 2, and 5, the four spare seedling platforms Ca have overlapping postures that overlap each other in plan view, and as shown in FIGS. 3 and 4, three preliminary seedling platforms in the lower stage. Ca is configured to be freely switchable to a deployment posture adjacent to each other in a straight line direction in the front-rear direction in a plan view.

  In the overlapping posture, the upper end of the preliminary seedling stand Ca arranged vertically is referred to as the first stage, and the lower one is sequentially referred to as the second stage, the third stage, and the fourth stage. The first and third-stage preliminary seedling platforms Ca are supported in a fixed state by the fixing bracket 26 with respect to the support frame 25 via support members, and the second and fourth-stage preliminary seedling platforms Ca are supported. Is detachably attached to the columnar frame 25 via a detachable bracket 27. In addition, a front connection piece 28 is provided at the front position of the third-stage preliminary seedling stage Ca, a rear connection piece 29 is provided at the rear position, and a rear part is provided at the rear end position of the second-stage preliminary seedling stage Ca. A connecting piece 29 is provided, and a front connecting piece 28 is provided at the front end position of the four-section preliminary seedling stage Ca.

  The front connection piece 28 and the rear connection piece 29 are configured to be connected and separated via a pin 30 in a lateral orientation, and when the preliminary seedling placement unit C is switched to the deployed posture, the second stage preliminary seedling placement base Ca is removed from the support frame 25, the rear connecting piece 29 is connected to the front connecting piece 28 of the third-stage preliminary seedling stage Ca by a pin 30, and the fourth-stage preliminary seedling stage Ca is attached to the post. The front connection piece 28 is removed from the frame 25 and an operation for connecting the front connection piece 28 to the rear connection piece 29 of the third-stage preliminary seedling stage Ca with the pin 30 is performed.

  As shown in FIGS. 1, 3, and 5, the support frame 25 is provided with a push switch type engine stop switch 31, and the engine E is forcibly stopped when operated by an operator on the boarding floor 22. It is comprised so that it can perform.

  In this embodiment, the spare seedling placement unit C is configured to be detachable as a configuration for realizing switching between the overlapped posture and the deployed posture. You may comprise so that it may switch to a deployment attitude | position by rocking | fluctuation centering on the axis | shaft of a horizontal attitude | position like the structure described. In this case, you may comprise so that it may become a positional relationship with which each preliminary seedling stand Ca overlaps in an overlapping attitude | position. Further, as described in Japanese Patent Application Laid-Open No. 2009-240224, it may be configured to switch to a deployed posture without removing a plurality of preliminary seedling platforms Ca via a link mechanism or the like.

  The four preliminary seedling platforms Ca have a common structure. That is, as shown in FIGS. 6 and 7, the preliminary seedling mounting stand Ca is composed of one seedling box 18 (see an example of the placed object, FIG. 11, FIG. 12, etc.) or seedling scoop that contains the mat-like seedling W. A bottom wall 33 having a width and a length that can be placed without leaving a plate (not shown) and a pair of left and right side walls 34 that are vertically oriented on both sides of the bottom wall 33 are made of a resin material. The bottom wall 33 has a plurality of openings 33A for draining water. These mat-like seedlings W, the seedling box 18, the seedling scooping plate, and the like are placed on the preliminary seedling placing stand Ca.

  A mounting portion is formed on the upper surface side of the bottom wall 33, and the mounting portion includes a plurality of rollers R protruding slightly above the bottom wall 33 so as to be rotatable around a rotation axis in a lateral orientation. Yes. Only the mat-like seedling W is not directly placed as a placement object to be placed on the placement unit, and the mat-like seedling W is placed in a state where it is accommodated in the breeding box 18 or mat-like seedlings are placed. W is placed in a state supported by the seedling scooping plate. In the preliminary seedling placement unit C, the placement parts of the three preliminary seedling placement bases Ca are the placement parts of the preliminary seedling placement unit C in the deployed posture. Alternatively, an empty seedling box 18 or fertilizer packed in a bag may be placed on the placement portion as a placement object.

  The first-stage preliminary seedling stage Ca is provided with a roller R in order to make the parts of the preliminary seedling stage Ca common. However, since there is no need to transport the object in the front-rear direction, the roller R is not provided. It may be configured.

  At the front end position and the rear end position of the first-stage preliminary seedling stage Ca, as shown in FIGS. 8 and 10A, the upper end portion 36T is bent toward the upper side of the bottom wall 33 (side view). A drop-off preventing member 36 made of a rod material bent into a bowl-like shape is attached to the second to third stage seedling mounting bases Ca, and has a simple shape that is an inverted U-shape. A drop prevention member 36 is detachably provided. As shown in FIGS. 9 and 10B, the drop-off prevention member 36 has two legs 36A, and the legs 36A are fitted in the bottom wall 33 of the preliminary seedling table Ca. It is provided in a form to be inserted into the joint hole 33B, and when it is removed, it is pulled out upward. The drop-off prevention member 36 is provided at one end in the width direction on the front end side and the rear end side of the preliminary seedling mounting table Ca.

  Thereby, when the mat-like seedling W accommodated in the seedling raising box 18 is placed on the first stage preliminary seedling placing table Ca, the fall prevention member 36 at the front and rear positions prevents the fall off. Further, when the preliminary seedling placement unit C is set to the unfolded posture, the fall prevention member 36 at the front and rear positions of the third stage preliminary seedling stage Ca is removed and the rear end of the second stage preliminary seedling stage Ca is removed. The dropout prevention member 36 on the side is removed, and the dropout prevention member 36 on the front end side of the fourth stage preliminary seedling stage Ca is removed, so that the second to fourth stage preliminary seedling stage Ca in the unfolded posture is placed. A placement object can be placed on the placement portion.

  The preliminary seedling placement unit C is set to have a gentle inclination in which the three preliminary seedling placement bases Ca are arranged in a linearly adjacent position in the deployed posture, and these are generally at a lower level toward the rear side. Reverse feed blocking means is provided for a plurality of rollers R provided in a spare seedling stage Ca (fourth stage preliminary seedling stage Ca in an overlapping posture) arranged at the rear position in the placement part of the preliminary seedling placement unit C. The one-way clutch 43 is provided. The one-way clutch 43 allows the placement object to move rearward of the machine body, and restricts the rotation of the roller R so as to prevent the placement object at the rear position of the machine body from moving forward.

[Preliminary seedling placement unit: Roller]
That is, the roller R of the preliminary seedling stage Ca between the front position and the central position in the deployed position (the second and third preliminary seedling stages Ca in the overlapping position) is as shown in FIGS. The roller body 42 is supported in a rotatable manner with respect to a support shaft 41 arranged coaxially with a laterally oriented shaft core, but the spare seedling stand Ca (overlapping posture) at the rear end position. As shown in FIGS. 11 to 13, the roller R of the fourth stage seedling mounting stand Ca) is fitted with a one-way clutch 43 as a reverse feed preventing means on the support shaft 41, and a roller body 42 on the outside thereof. A felt 44 having a high friction coefficient is attached to the outer periphery of the roller body 42 as a slip suppression portion.

  The one-way clutch 43 has a configuration in which a roller or a ball is arranged between an outer ring body having a cam surface on the inner peripheral surface and a support shaft 41, and is a roller that rotates integrally with the outer ring body. The body 42 is provided, and the support shaft 41 is fixed in a non-rotatable manner with respect to the bottom wall 33 of the preliminary seedling table Ca.

  In the present invention, the one-way clutch 43 serving as the reverse feed prevention means is configured to prevent rotation in one direction by using a ratchet pawl, or prevented from rotating in one direction by using a lap spring. Can be used. In addition, as a slip suppression portion, the outer periphery of the roller body 42 is finished to a rough surface, an elastomer material with high adhesion such as rubber is applied, or a resin containing sand material is applied to cause friction on the surface. You may comprise so that a coefficient may be made high.

[Operation / Effect of Embodiment]
With such a configuration, in a state where the seedling box 18 containing the mat-like seedling W is placed at the front end position of the three preliminary seedling platforms Ca in the deployed posture, the operator points the seedling box 18 rearward. When the roller R is rotated (forward rotation), the seedling box 18 is fed to the spare seedling table Ca at the rear end position, and is moved in contact with the fall prevention member 36 at the rear end position. Stop. In addition, since the three preliminary seedling platforms Ca in the deployed posture are in an inclined posture in which the rear end side is at a low level, when the seedling box 18 is sent to the rear end position, the weight of the seedling box 18 and the mat-like seedling W is reduced. This makes it easy to send to the rear end position.

  Even if an external force that moves the seedling box 18 forward may act after one seedling box 18 containing the mat-like seedlings W has been fed to the position of the spare seedling stage Ca at the rear end position, the direction is one direction. The reverse rotation of the roller R is prevented by the clutch 43, and the slip of the seedling box 18 on the outer peripheral surface of the roller body 42 is prevented by the felt 44 attached to the outer periphery of the roller R, and the seedling box 18 moves forward. There is nothing. That is, when placing the three seedling boxes 18 containing the mat-like seedlings W on the three preliminary seedling platforms Ca in the deployed posture, the respective seedling boxes 18 abut in the front-rear direction, These seedling boxes 18 do not move in the front-rear direction, but in the case of one seedling box 18, the seedling box 18 is easily moved back and forth, so that the roller R of the preliminary seedling stand Ca at the rear end position in the deployed position. This inconvenience is eliminated by providing the one-way clutch 43.

  Further, when the operator gets into the traveling machine body A from the front end position of the traveling machine body A, the operator steps on the auxiliary step 24 by pulling out the auxiliary step 24 at the front end of the traveling machine body A to the protruding position. It is possible to get in easily.

[Another embodiment]
The present invention may be configured as follows in addition to the embodiment described above.

(A) As shown in FIGS. 14 and 15, the reverse of preventing the forward movement of the seedling box 18 (an example of the load) placed on the placement portion on the rear end side of the preliminary seedling placement unit C. As a feed blocking means, a stopper 51 is provided that can be switched between a contact position that contacts the tip side of the seedling box 18 and a non-contact position that allows movement of the seedling box 18. The stopper 51 is composed of a plate material that is swingably supported around a switching shaft 52 in a front-back orientation with respect to the bottom wall 33 of the preliminary seedling table Ca, and is provided on the driver seat side of the preliminary seedling table Ca. The side wall 34 is connected via a rod 55 and a switching lever 54 supported so as to be swingable around a support shaft 53.

  From this configuration, the stopper 51 moves downward from the bottom wall 33 by being set to the non-contact position shown in FIG. It is possible to move the load to the spare seedling stage Ca at the rear position. Thereafter, the stopper 51 protrudes upward from the bottom wall 33 by setting the contact position shown in FIGS. 14B and 15 by an artificial operation of the switching lever 54, so that the nursery box 18 moves forward. Stopped.

  Also in another embodiment (a), the plurality of preliminary seedling platforms Ca are provided with a plurality of rollers R so as to be rotatable in the normal rotation direction and the reverse rotation direction, but also in this other embodiment (a), as described above. Similar to the embodiment, the roller R may be provided with a one-way clutch 43.

(B) A state in which the stopper 51 as the reverse feed preventing means of another embodiment (a) protrudes by sliding movement from the side wall 34 of the spare seedling table Ca by the sliding movement, and the sliding movement from this path It may be configured to be switchable to a retracted state in which it is withdrawn. In such a configuration, the structure for switching between the contact position and the non-contact position can be set in various ways. Further, it may be configured to be switchable between a contact position and a non-contact position by a driving force of an electromagnetic solenoid or an electric motor.

(C) As shown in FIG. 16, the seedling box 18 is sent backward in order to prevent the seedling box 18 (an example of the placement object) placed on the placing part on the rear end side from moving forward. If the seedling box 18 comes into contact with the seedling box 18, it retracts to the level of the bottom wall 33, and after the seedling box 18 has passed, it abuts against the front end of the seedling box 18 to prevent forward movement. A stopper 51 is provided as a reverse feed preventing means so as to be swingable about a shaft body 56 in a lateral posture on the front end side and biased in a projecting direction by a projecting spring 57 so as to project upward.

  By providing this stopper 51, the stopper 51 protrudes after retreating downward to prevent the nursery box 18 from moving forward only by moving the seedling box 18 to the rear end side of the preliminary seedling placement unit C. This means that no special operation is required.

(D) In the above-described embodiment, the spare seedling placement unit C is configured so that the plurality of preliminary seedling placement stands Ca can be switched between the overlapping posture and the deployed posture. C is composed of a plate-like placement member that forms a flat placement portion on which a plurality of seedling boxes 18 can be placed. In this configuration, since it is not necessary to switch the posture of the preliminary seedling placement unit C, the configuration is simplified and the assembly is facilitated.

(E) Although it is similar to another embodiment (d), it is provided with a first placement member in the form of a plate that forms a flat placement portion on which a plurality of seedling boxes 18 can be placed. A preliminary seedling placement unit C is configured by including a second placement member that is detachably attached to the rear end of the first placement member, or that can switch its posture via a link mechanism or the like. With this configuration, it is possible to get on and off the driver's seat 3 by separating the second placement member and switching the posture.

  INDUSTRIAL APPLICATION This invention can be utilized for the riding type rice transplanter provided with the reserve seedling mounting unit which mounts a reserve seedling.

18 Nursery box / placement 43 Reverse feed prevention means / one-way clutch 44 Slip suppression part (felt)
51 Reverse feed prevention means / stopper A Traveling machine body C Preliminary seedling placement unit Ca Preliminary seedling placement base R Roller W Matt-like seedlings / placement

Claims (6)

A riding type rice transplanter equipped with a preliminary seedling placement unit capable of placing a plurality of mat-like seedlings in a straight line in the front-rear direction at the front position of the traveling machine body,
The preliminary seedling placement unit is provided with a placement portion for placing a placement object such as the mat-like seedling, a seedling box, a seedling scooping plate, or the like. Riding type rice transplanter equipped with reverse feed blocking means to block movement of   The riding type rice transplanter according to claim 1, wherein the reverse feed blocking means is provided in a state of acting on at least the rearmost placed object among the previously described figurines placed on the aforementioned placing part. The preliminary seedling placement unit rotates around the axis of the horizontal posture so as to allow movement of the figurine by contacting and rotating the lower surface of the figurine placed on the placement unit. It has a plurality of freely supported rollers,
The reverse feed prevention means allows the movement of the above-mentioned figurine to the rear of the machine body at the rear position of the above-mentioned placement part, and restricts the rotation of the roller so as to prevent the movement of the above-mentioned figurine to the front of the machine body. The riding type rice transplanter according to claim 1 or 2, comprising a one-way clutch.   The preliminary seedling placement unit has a configuration in which a plurality of preliminary seedling placement platforms are arranged in a straight line in the front-rear direction, and the one-way clutch is provided on one of the preliminary seedling platforms at a rear end position. The riding type rice transplanter according to claim 3, which is provided so as to limit the rotation of the roller.   The riding mold according to claim 3 or 4, wherein a slip suppression portion that suppresses slippage of the figurine that comes into contact with the outer peripheral surface of the roller is formed on the outer peripheral surface of the roller whose rotation is restricted by the one-way clutch. Rice transplanter.   An allowable posture in which the reverse feed prevention means allows the movement of the above-mentioned figurine placed on the placement unit to the rear of the machine body, and a contact attitude to prevent the forward movement by contacting the above-mentioned figurine. The riding-type rice transplanter according to claim 1 or 2, comprising a stopper that can be switched between.

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