JP2002335728A - Seedling planting device of rice transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To compose a part where a bevel gear of a transmission shaft on the upstream side in a transmission system to a planting arm is engaged with a bevel gear of a transmission shaft on the downstream side so as to be supportable with a simple structure in a seedling planting device of a rice transplanter. SOLUTION: This seedling planting device of the rice transplanter is obtained by preparing a bearing member 36 in which a first sliding bearing part 36a supporting either one of transmission shafts 26 and 34 on the upstream side and the downstream side and a second sliding bearing part 36b supporting the other of the transmission shafts 26 and 34 on the upstream side and the downstream side are integrally provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a seedling planting device in a riding type or walking type rice transplanter.

[0002]

2. Description of the Related Art In a seedling planting apparatus of a rice transplanter, a feed case to which power is transmitted from an airframe, a support case extending right and left laterally from the feed case, and a support case extending rearward from the support case. In some cases, a planting case is provided, and a planting arm for planting a seedling on a rice field surface is provided at the rear of the planting case. In this case, the power of the feed case is configured to be transmitted to the planting arm via a transmission system disposed inside the feed case, the support case, and the planting case. A support member is provided in the support case or the planting case, the support member extends downward, and the ground float is supported so as to be vertically swingable around a horizontal axis of the support member.

[0003] In a seedling planting device of a rice transplanter, a seedling placing mechanism is provided on each of the seedling placing surfaces of the seedling placing stand.
A vertical feed shaft protrudes from the feed case, and a drive arm is provided at an end of the vertical feed shaft. Thus, the seedling rest is reciprocally moved sideways to the left and right, and when the seedling rest reaches the right or left movement limit, the input portion of the vertical feed mechanism reaches the position of the drive arm, and the vertical feed mechanism is moved by the drive arm. Is driven, and the vertical feed mechanism is driven.

In a seedling planting device of a rice transplanter, a planting arm for planting a seedling on a rice field is provided with a planting claw and a slidable seedling pushing tool, and the seedling pushing tool is inserted into the inside of the planting arm. A spring that urges the seedling pushing tool to the projecting side, and a cam mechanism that slides the seedling pushing tool inside the planting arm against the spring and allows the spring to operate the seedling pushing tool toward the projecting side. Some are located inside the attached arm. Thus, when the seedling extruding portion is slid into the planting arm by the cam mechanism, the seedling is taken out from the seedling rest by the planting claw and the seedling pushing tool, and when the planting arm enters the rice field, The seedling pushing tool is slid to the projecting side by the spring, and the seedling is separated from the planting claws and the seedling pushing tool and is planted on the rice field.

In this case, a ring member made of an elastic material is fitted over the seedling pushing tool to absorb the impact when the seedling pushing tool is slid to the projecting side by the spring, and the seedling pushing tool is moved by the spring. There is a configuration in which the cam mechanism or the seedling pushing tool presses the ring member against the inner wall of the planting arm when the sliding operation is performed to the projecting side, so that the sliding operation of the seedling pushing tool toward the projecting side is stopped. .

[0006]

When the feed case, the support case and the planting case are provided as described above, there is a portion where the bevel gear of the upper transmission shaft and the bevel gear of the lower transmission shaft are engaged. . SUMMARY OF THE INVENTION It is an object of the present invention to provide a seedling planting device for a rice transplanter that can support a portion where a bevel gear of an upper transmission shaft and a bevel gear of a lower transmission shaft engage with each other with a simple structure.

When the feed case, the support case, and the planting case are provided as described above, there is room for improvement in terms of simplifying the structure by sharing each part as much as possible. SUMMARY OF THE INVENTION It is an object of the present invention to provide a seedling planting device for a rice transplanter, in particular, a feed case, a support case, and a planting case that can be shared.

When the feed case, the support case, and the planting case are provided as described above, there is room for improvement in terms of simplifying the structure by integrating the components as much as possible. SUMMARY OF THE INVENTION It is an object of the present invention to provide a seedling planting device for a rice transplanter, in particular, a feed case, a support case, and a planting case that can be integrated.

[0009] As described above, when the feed float, the support case, and the planting case are provided, and the ground float is vertically swingably supported around the horizontal axis of the support case or the support member provided in the planting case, A stopper is required to stop the downward swing of the front part of the ground float at a predetermined position. SUMMARY OF THE INVENTION It is an object of the present invention to provide a seedling planting device for a rice transplanter, wherein a stopper for stopping a downward swing of a front portion of a ground float at a predetermined position can be obtained with a simple structure.

As described above, when the vertical feed mechanism and the input portion of the vertical feed mechanism, the feed case, the vertical feed shaft, and the drive arm are provided, the structure of the feed case, the vertical feed shaft, and the like can be simplified. There is room for An object of the present invention is to simplify the structures of a feed case, a vertical feed shaft, and the like in a seedling planting device of a rice transplanter.

As described above, inside the planting arm,
When the ring member made of elastic material is fitted to the seedling extruder,
When the sliding operation of the seedling extruding tool into the planting case and the sliding operation to the protruding side are repeated, the ring member moves together with the seedling extruding tool. In such a state, when the seedling pushing tool (ring member) is slid to the projecting side by the spring and the cam mechanism or the seedling pushing tool presses the ring member against the inner wall of the planting arm, the seedling pushing tool or the planting arm is moved. The grease applied to the inner wall may come out of the planting arm through the insertion hole of the seedling extruder in the planting arm due to the pressing action of the ring member. SUMMARY OF THE INVENTION It is an object of the present invention to prevent a state in which grease comes out of a planting arm through an insertion hole of a seedling pushing tool in a planting arm in a planting device of a rice transplanter.

[0012]

According to a first aspect of the present invention, there is provided a feed case to which power is transmitted from an airframe, a support case extending right and left laterally from the feed case, and a support case. A planting case that extends rearward and has a planting arm at the rear is provided.The power transmission system from the feed case or the support case or a feed case disposed inside the planting case to the planting arm is a good power transmission system. A first sliding bearing portion that supports one of the upper and lower transmission shafts at a portion where the bevel gear of the lower transmission shaft and the bevel gear of the lower transmission shaft engage, and an upper and lower transmission A second sliding bearing portion for supporting the other of the shafts is provided integrally with the bearing member.

For example, when the first and second slide bearings are separately configured, when the first and second slide bearings are attached to a feed case (or a support case) (or a planting case), the first and the second slide bearings are mounted. It is necessary to separately provide a feed case (or a support case) (or a planting case) with an attachment portion corresponding to each of the slide bearing portions. According to the first aspect of the present invention, since the bearing member includes the first and second slide bearings integrally, when the bearing member is attached to the feed case (or the support case) (or the planting case), The mounting portions corresponding to each of the first and second sliding bearing portions as described above can be shared to some extent, and can be used as the mounting portions of the bearing members, and the mounting portions of the bearing members can be reduced. .

According to the first aspect of the present invention, the bearing member does not support the transmission shaft via the bearing, but includes the first and second sliding bearing portions that directly support the transmission shaft. It has a relatively simple shape. Thus, according to the features of the first aspect, the mold for producing the bearing member is not so complicated, and the molds for producing the first and second slide bearings are separately prepared. No need.

[II] According to the features of the second aspect, similar to the case of the first aspect, the present invention has the "action" described in the above-mentioned [I], and additionally has the following "action". ing. According to the features of claim 2, the other end of the upper and lower transmission shafts is disposed on one side of the upper and lower transmission shafts so as to face each other. The bevel gear of the power transmission shaft and the bevel gear of the lower power transmission shaft are engaged with each other, and an open portion that can be fitted from the side that intersects the axis of the other of the upper power transmission shaft and the lower power transmission shaft, Two slide bearings are provided.

According to the second aspect of the present invention, the first sliding bearing is disposed along the axial center direction of one of the upper and lower transmission shafts, of the upper and lower transmission shafts. The second sliding bearing portion is inserted from one side of the upper and lower transmission shafts crossing the axis direction of the other through the opening portion, and is inserted into one of the upper and lower transmission shafts. It can be easily fitted into the other of the transmission shafts.

[III] According to the feature of claim 3, similar to the case of claim 2, the "action" described in the above [I] and [II] is provided, and in addition, the following "action" is provided. "
It has. According to the feature of the third aspect, the good transmission shaft is arranged inside the support case, and protrudes from the end of the support case on the planting case side. A stud bolt is provided along the axis of the transmission shaft on the side. The lower transmission shaft is disposed inside the planting case, and a bolt insertion hole and an opening are provided at an end of the planting case on the support case side.

According to the third aspect of the present invention, the stud bolt is inserted into the bolt insertion hole of the planting case, the upper transmission shaft is inserted into the opening of the planting case, and the upper transmission shaft is inserted. And the bevel gear of the lower transmission shaft are engaged with each other. In this state, the planting case is temporarily held by the support case by the stud bolt. Thereafter, the bearing member is inserted from the opening of the planting case, the first slide bearing is fitted to the upper transmission shaft, and the second slide bearing is fitted to the lower transmission shaft. In this case, the bearing member can be inserted from the opening of the planting case while the planting case is temporarily held by the support case.
There is no such a situation that it becomes difficult to mount the bearing member due to a change in the direction of the planting case.

[IV] According to the feature of claim 4, a feed case to which power is transmitted from the body, a support case extending rightward and left laterally from the feed case, and a support case extending rearward from the support case. When a planting case with a planting arm at the rear is provided, the feed case is arranged at the center of the right and left sides of the seedling planting device, and the right and left support cases extend right and left laterally from the feed case, A planting case with a planting arm at the rear extends rearward from the right and left support cases.

In the seedling planting apparatus, the positions of the planting arm and the right and left planting cases are determined and symmetrically arranged. Arranging in the center of the left and right sides of the device makes it possible to equalize the distance between the feed case and the right planting case, and the distance between the feed case and the left planting case. Can be shared by using the same supporting case. As described above, if the feed case can be arranged in the center of the right and left sides of the seedling planting device and the right and left support cases can be shared, the transmission mechanism disposed inside the right and left support cases also It becomes possible to configure symmetrically.

[V] According to the feature of claim 5, a feed case to which power is transmitted from the body, a support case extending rightward and leftward from the feed case, and a support case extending rearward from the support case. When a planting case having a planting arm at the rear is provided, the feed case is arranged at the center of the right and left sides of the seedling planting device, and the feed case is configured in a divided structure of a right part and a left part. The right support case is integrally formed in the part and extends in the right lateral direction,
A left support case is integrally formed on the left portion of the feed case and extends in the left lateral direction.

According to a fifth aspect of the present invention, the right case is formed integrally with the right part of the feed case, and the left case is formed integrally with the left part of the feed case. Bolts and nuts for connecting the right and left support cases to the right and left portions are not required. In this case, since the feed case is generally configured in a divided structure of the right and left portions, even if the right and left support cases are integrally formed on the right and left portions of the feed case, the feed case is not formed. The transmission mechanism can be arranged without hindrance inside or inside the right and left support cases, and thereafter the right and left portions of the feed case can be connected.

In the seedling planting apparatus, the positions of the planting arm and the right and left planting cases are determined, and are arranged symmetrically. Arranging in the center of the left and right sides of the device makes it possible to equalize the distance between the feed case and the right planting case, and the distance between the feed case and the left planting case. Can be formed in a similar shape. As described above, if the feed case is arranged at the center of the right and left sides of the seedling planting apparatus and the right and left support cases can be formed in the same shape, the transmission mechanism arranged inside the right and left support cases Can also be configured symmetrically.

[VI] According to the feature of claim 6, a feed case to which power is transmitted from the body, a support case extending rightward and leftward from the feed case, and a support case extending rearward from the support case. When a planting case with a planting arm is provided at the rear, a cover member is attached to the opening at the rear of the planting case, and a stopper is provided on the cover member, and the grounding on the rear side of the horizontal axis of the support member is provided. When the stopper comes into contact with the float portion, the downward swing of the front portion of the grounding float is stopped at a predetermined position.

The planting case is generally formed in a cylindrical shape, and an opening may be formed at the rear of the planting case. Therefore, it is necessary to attach a lid member to the opening at the rear of the planting case. is there. Thus, according to the feature of claim 6, it is necessary to provide a dedicated member for supporting the stopper by providing the stopper on the lid member of the opening at the rear of the planting case, which may be an existing member. Absent.

[VII] According to the feature of claim 7, when the vertical feed mechanism and the input section of the vertical feed mechanism, the feed case, the vertical feed shaft and the drive arm are provided, the feed case is provided at the center of the right and left of the seedling planting apparatus. It is arranged, and the vertical feed shaft is protruded to the right and left from the feed case, and a drive arm is provided at the right and left ends of the vertical feed shaft. Have. By this, the seedling rest is reciprocated laterally to the left and right, and when the seedling rest reaches the right or left movement limit, the input part of the vertical feed mechanism reaches the position of the right or left drive arm. The input portion of the vertical feed mechanism is driven by the right or left drive arm, and the vertical feed mechanism is driven.

According to the seventh aspect of the present invention, the vertical feed shaft, the right and left drive arms, the vertical feed mechanism, the input unit, and the like can be arranged substantially symmetrically. The right and left components can be shared in the drive arm, vertical feed mechanism and input unit of the, and related parts.

[VIII] According to the feature of claim 8, a ring member made of an elastic material is externally fitted to the seedling pushing tool inside the planting arm, and the seedling pushing tool is slid to the projecting side by the spring. When the cam mechanism or the seedling pushing tool presses the ring member against the inner wall of the planting arm to stop the sliding operation of the seedling pushing tool to the projecting side, the inner wall side of the planting arm in the ring member Is provided with a radial groove reaching the outer end of the ring member.

According to the eighth aspect of the present invention, when the seedling pushing tool is slid to the projecting side by the spring, and the ring member is pressed against the inner wall of the planting arm by the cam mechanism or the seedling pushing tool, the planting of the ring member takes place. The grease between the inner wall-side end surface of the attached arm and the inner wall of the planted arm is pushed by the ring member to the outer end of the ring member along the groove of the inner wall side end surface of the planted arm in the ring member. Therefore, the state in which the above-mentioned grease is pushed into the insertion hole of the seedling pushing tool in the planting arm by the pressing action of the ring member is reduced.

In this case, it is conceivable that the above-mentioned groove is formed on the inner wall of the planting arm (the portion around the insertion hole of the seedling extruding tool in the planting arm), but this portion is formed in the recessed portion of the planting arm. Therefore, it is often difficult to form the aforementioned groove. According to the feature of the first aspect, in the ring member that is a separate member from the planting arm and the seedling extruding tool, the groove is formed on the end surface of the ring member on the inner wall side of the planting arm. The formation of the above-mentioned groove is easy.

[0031]

DESCRIPTION OF THE PREFERRED EMBODIMENTS [1] As shown in FIG.
An engine 3 is provided at a front portion of the body supported by the rear wheels 2, and a driving unit 6 including a steering wheel 4 and a driving seat 5 is provided on the body, and a link mechanism 8 is provided by a hydraulic cylinder 7. The seedling planting device 9 is supported by the link mechanism 8 so as to be able to move up and down freely, thereby forming a riding type rice transplanter of a four-row type.

As shown in FIG. 2 and FIG.
Is a feed case 10, right and left support cases 11 extending right and left laterally from the feed case 10, right and left planting cases 12 extending rearward from the supporting case 11, and planting cases 12. The right and left planting arms 13 rotatably supported at the rear of the plant, a seedling rest 14 driven to reciprocate laterally to the left and right, a center float 15, and right and left side floats 16 are provided. I have. As a result, the planting arm 13 takes out the seedlings from the seedling take-out port 62a and plants them on the rice field as the seedling placing table 14 is driven to reciprocate laterally to the left and right.

[2] Next, the structure of the feed case 10 will be described. As shown in FIGS. 3, 6, and 7, the feed case 10 has a two-part structure including a right portion 10R and a left portion 10L, and a plurality of portions of the right and left portions 10R and 10L of the feed case 10 include bolts and bolts. They are connected by nuts (not shown). The mating surface of the right and left portions 10R, 10L of the feed case 10
Centerline CL at center of right and left of body and seedling planting device 9
It is located in.

As shown in FIG. 6, an input shaft 17 is supported at the front of the feed case 10, and the input shaft 17 is rotatably supported by a boss 8a provided at the lower rear end of the link mechanism 8. And the PT from which the power of the engine 3 is transmitted
An O-shaft 18 (see FIGS. 1 and 2) is connected to the input shaft 17. Thereby, the seedling planting device 9 (feed case 10) can freely roll around the axis of the input shaft 17,
It is supported by the link mechanism 8.

As shown in FIG. 6, a planting clutch 20 is formed between the transmission shaft 19 and the input shaft 17 arranged inside the feed case 10. A bevel gear 21 is externally fitted to the transmission shaft 19 so as to be relatively rotatable.
Are engaged with the bevel gear 17a of the input shaft 17. The clutch member 22 is externally slidably and integrally rotatable around the transmission shaft 19 by the key 23, and the clutch member 22 is urged toward the bevel gear 21 by the spring 24.

The state shown in FIG. 6 is a state where the clutch member 22 is engaged with the bevel gear 21 and the power of the input shaft 17 is transmitted to the transmission shaft 19 via the bevel gear 21 and the clutch member 22 (planting). (The clutch 20 is operated to the transmission side.) When the operation pin 25 is inserted from the state shown in FIG.
a, the clutch member 22 is separated from the bevel gear 21 against the spring 24 by the cam action between the operation pin 25 and the cam surface 22a of the clutch member 22, and is held at a predetermined rotational phase. This state is a state in which the planting clutch 20 is operated to the transmission blocking side, and stops in a state where the planting arm 13 is located above the rice field surface (see FIGS. 1 and 2).

As shown in FIG. 6, a transmission shaft 26 is supported at a lower portion of the feed case 10, and a transmission chain 27 is wound around a sprocket 19a of the transmission shaft 19 and a sprocket 26a of the transmission shaft 26. I have. 3 and 7
As shown in FIG. 1, a feed shaft 28 and a vertical feed shaft 29 are supported by the feed case 10.

[3] Next, the structure of the transmission system from the feed case 10 to the planting arm 13 will be described. As shown in FIG. 3 and FIG.
At 0L, a plurality of stud bolts 30 are attached to a portion around the transmission shaft 26, and the right support case 1
1 is connected to the stud bolt 30 by a nut 31 so as to sandwich the right portion 10R of the feed case 10, the left support case 11 is connected to the stud bolt 30 by the nut 31, and the right and left support cases 11 And extend to the left lateral direction. In this case, the right and left support cases 11 are the same.

As shown in FIGS. 3 and 6, the transmission shaft 26 is disposed inside the right and left support cases 11 from the feed case 10, and as shown in FIG. The bevel gear 32 protrudes from the end of the transmission shaft 26 and is fixed to a position protruding from the end of the support case 11. A plurality of stud bolts 33 are attached to the end of the support case 11 along the axial direction of the transmission shaft 26.

As shown in FIG. 9, the right and left planting cases 12 have first and second openings 12 at the left and right of the front end.
a, 12b are formed, and a plurality of bolt insertion holes 12 are formed.
c is formed. The transmission shaft 3 is set inside the planting case 12.
4 is arranged so that the end of the transmission shaft 34 is located between the first and second openings 12a and 12b, and the bevel gear 35 is fixed to the end of the transmission shaft 34.

As shown in FIGS. 11, 12, and 13, a bearing member 36 is provided. The bearing member 36 is integrally formed of a resin, and has a first through-hole 36c.
The first and second slide bearings 36a and 36b are integrally provided by a pair of connecting portions 36f, including a slide bearing 36a, and a second slide bearing 36b having a bridge 36d and an arc-shaped recess 36e. It is connected. A convex portion 36g is formed integrally with the first sliding bearing portion 36a.
A convex portion 36h is formed integrally with f.

With the above structure, in the bearing member 36, as shown in FIG. 9 and FIG.
The transmission shaft 26 is inserted into the through hole 36c of 6a, and the projection 36g of the first sliding bearing portion 36a is inserted into the concave locking portion 12d of the planting case 12. Bevel gear 3
5 is located between the first and second sliding bearings 36a and 36b (bevel gears 32 and 35 are in an engaged state).
Thus, the transmission shaft 34 is inserted into the concave portion 36e of the second slide bearing portion 36b.
Is inserted. As shown in FIGS. 3 and 9, the support case 37 is applied to the second opening 12 b, the nut 38 is attached to the stud bolt 33, and the support plate 37 sandwiches the planting case 12. 11 are connected.

In the state shown in FIG. 9 and FIG.
The point that the convex portion 36g of the sliding bearing portion 36a is inserted into the locking portion 12d of the planting case 12, the point that the convex portion 12e of the planting case 12 contacts the connection portion 36f, the second sliding bearing portion 36b is in contact with the inner wall of the planting case 12,
The convex portion 36g of the first sliding bearing portion 36a and the connecting portion 36f
The point where the convex portion 36h contacts the support plate 37 supports the bearing member 36 so as not to move.

As a result, as shown in FIGS.
The transmission shaft 26 is formed by the ball bearing 39 of the left portion 10L of the feed case 10 and the bearing member 36 (first sliding bearing portion 36a) at the end of the right and left support cases 11.
Is supported. As shown in FIGS. 3, 9, and 14, the transmission shaft 34 is formed by the bearing member 36 (second slide bearing portion 36 b) at the front end of the planting case 12 and the slide bearing member 40 at the rear end of the planting case 12. It will be supported.

As shown in FIGS. 3 and 14, a drive shaft 41 is supported laterally at the rear ends of the right and left planting cases 12, and right and left planting arms 13 are provided at both ends of the drive shaft 41. Are supported, and a bevel gear 42 fixed to an end of the transmission shaft 34 is engaged with a bevel gear 43 fixed to the drive shaft 41. With the above structure, as shown in FIGS. 3 and 6, the power of the input shaft 17 is transmitted from the planting clutch 20, the transmission shaft 19, the transmission chain 27, the transmission shaft 26, and the bevel gear 3.
2, 35, the transmission shaft 34, and the bevel gears 42, 43 are transmitted to the drive shaft 41, and the drive shaft 41 is rotationally driven,
The planting arm 13 takes out the seedling from the seedling take-out opening 62a and plants it on the rice field. In this case, eight bevel gears 3
2, 35, 42, and 43 have the same number of teeth and the same outer diameter, and are manufactured by cold forging.

As shown in FIGS. 9, 12 and 13, the bridging portion 36 d is formed on the second sliding bearing portion 36 b of the bearing member 36.
And a portion (bridge portion 36d) that does not support the transmission shaft 34 is present in the second slide bearing portion 36b. However, the power of the transmission shaft 26 is rotated to rotate the bevel gear 3.
When the transmission shaft 34 is transmitted to the transmission shaft 34 via the gears 2 and 35, the transmission shaft 34 is pushed to the left in FIG. 9 by the occlusal action of the bevel gears 32 and 35. Side (opposite to the bridging portion 36d), so that even if there is a portion (the bridging portion 36d) that does not support the transmission shaft 34 in the second sliding bearing portion 36b, the transmission shaft 34 is It is supported without trouble by the second sliding bearing portion 36b.

[4] Next, the structure of the planting arm 13 will be described. As shown in FIGS.
The drive arm 44 is fixed to the end of the
The planting arm 13 is rotatably supported on a support shaft 45 fixed to the arm. At the rear end of the planting case 12, a support portion 12f extends obliquely upward and rearward, and an arm 46 supported swingably around the horizontal axis P1 of the support portion 12f is moved downward from the planting arm 13. The arm 13a is swingably connected to the extended arm 13a around the horizontal axis P2. This allows
The rotation of the drive shaft 41 causes the planting arm 13 to reciprocate up and down.

As shown in FIGS. 14 and 15 (a), the planting claws 46 are fixed to the planting arm 13, and the planting arm 13 is fixed.
A seedling pushing tool 47 is slidably supported in the insertion hole 13b, a bush 48 is provided in the insertion hole 13b, and a seal member 49 is attached to an end of the insertion hole 13b. A cam arm 50 is swingably supported around the horizontal axis P3 inside the planting arm 13, and the rear end of the seedling extruder 47 and the cam arm 50 are connected via a link member 51. A spring 52 is provided to urge the seedling pushing tool 47 to the projecting side through the spring. Inside the planting arm 13, a cam member 53 is fixed to a support shaft 45, and a lower portion 50 of the cam arm 50 is provided.
a is in contact with the cam member 53.

With the above structure, the drive shaft 41 is rotated and driven, so that the support shaft 4 is
5 and the cam member 53 are driven to rotate. Thus, when the planting arm 13 passes through the seedling take-out opening 62a, the cam arm 50 is swung clockwise in FIG. The seedling 47 is slid into the inside of the planting arm 13 (the state shown by the solid line in FIG. 15A), and the seedling is held at the tip of the planting claw 46 and the seedling pushing tool 47.
Next, when the planting claw 46 and the seedling pushing tool 47 protrude into the rice field, the cam member 53 is disengaged from the lower portion 50a of the cam arm 50, and the seedling pushing tool 47 is slid to the projecting side by the spring 52 (FIG. 15A). The seedling is separated from the planting claws 46 and the seedling pushing tool 47 and is planted on the rice field.

As shown in FIGS. 14 and 15A, a ring member 54 made of hard rubber is externally fitted to the seedling extruding tool 47 inside the planting arm 13, and a metal member A receiving plate 54a is attached. As a result, when the seedling pushing tool 47 is slid to the projecting side by the spring 52 as described above, the link member 51 is moved.
Hits against the receiving plate 54a and presses the ring member 54 against the inner wall of the planting arm 13, so that the spring 52 absorbs the impact when the seedling pushing tool 47 is slid to the projecting side, and the seedling pushing tool 47 The slide operation to the protruding side is stopped.

In this case, as shown in FIGS. 15 (a) and (b), a plurality of radial members extending from the inner end to the outer end of the ring member 54 are provided on the end surface of the ring member 54 on the inner wall side of the planting arm 13. Groove 54b is formed. This allows
As described above, the seedling pushing tool 47 is slid to the projecting side by the spring 52, and the ring member 54 is
When pressed against the inner wall of the ring member 54, the grease between the end surface of the ring member 54 on the inner wall side of the planting arm 13 and the inner wall of the planting arm 13 is formed by the pressing action of the ring member 54.
Since the grease is guided to the outer end of the ring member 54 along the line b, the state in which grease is pushed into the insertion hole 13b by the pressing action of the ring member 54 is reduced.

[5] Next, the reciprocating lateral feeding structure of the seedling placing stand 14 will be described. As shown in FIGS. 2 and 5, the guide rail 62 is supported in the left-right direction,
2 is provided with a seedling take-out opening 62a.
The lower part of 4 is supported movably laterally along the guide rail 62. As shown in FIGS. 2 and 4, a frame 63 extends upward from the right and left support plates 37, and a roller 64 at the upper end of the frame 63 is attached to a horizontal frame 64 fixed to the upper back surface of the seedling stand 14. 63a is inserted, and the upper part of the seedling placing stand 14 is supported by the rollers 63a of the frame 63 and the horizontal frame 64 so as to be able to move laterally.

As shown in FIGS. 3 and 7, the traverse shaft 28 supported by the feed case 10 is
The end of the transverse feed shaft 28 is rotatably supported by a bearing portion 55a at the end of the frame 55 fixed to the frame 63 and protruding from the left side portion 10L. Lateral feed shaft 28
Is formed with a spiral groove 28a, and a feed member 56 that engages with the spiral groove 28a is externally fitted to the lateral feed shaft 28. The seedling rest 14 and the feed member 56 are connected to each other. An elastic rubber cover 57 is provided between the feed member 56 and the left portion 10L of the feed case 10 and between the feed member 56 and the bearing 55a. Is attached.

As shown in FIG. 7, the transmission shaft 19 and the transverse feed shaft 28 protrude from the right side portion 10R of the feed case 10 and the transmission gear 58 attached to the end of the transmission shaft 19.
And a transmission gear 59 attached to the end of the transverse feed shaft 28.
And the cover 6 that covers the transmission gears 58 and 59
0 is provided.

With the above structure, the power of the input shaft 17 is transmitted to the traverse shaft 28 via the planting clutch 20, the transmission shaft 19, and the transmission gears 58 and 59, and the traverse shaft 28 is driven to rotate. As a result, the feed member 56 is reciprocated and laterally driven along the laterally feeding shaft 28, and the seedling placing table 14 is reciprocated and laterally driven within a predetermined moving range (an interval between right and left driving arms 29a to be described later). Is done. In this case, the cover 60
By removing the transmission gears 58 and 59 with the transmission gears 58 and 59 having different reduction ratios, the lateral feed speed of the seedling mounting base 14 is changed so that the planting arm 13 passes through the seedling removal port 62a. You can change the amount of seedlings you take out.

[6] Next, the vertical feeding structure of the seedlings placed on the seedling placing stand 14 will be described. As shown in FIGS. 3, 4, and 7, a vertical feed shaft 29 supported by the feed case 10 projects left and right from right and left portions 10R and 10L of the feed case 10, and the vertical feed shaft 29 extends from the center line CL. Right and left drive arms 29a are attached at right and left equidistant positions, and the right and left drive arms 29a extend toward the seedling rest 14. FIG.
As shown in FIG. 8, an arm 29b is attached to the vertical feed shaft 29 inside the feed case 10, and a spring 61 for urging the vertical feed shaft 29 clockwise in FIG. A cam member 28b is attached to the shaft 28.

With the above structure, the horizontal feed shaft 28 is rotated clockwise in FIG. 8 and the cam member 28b comes into contact with the arm 29b, so that the vertical feed shaft 29
8 (the right and left drive arms 29a are swingably driven upward). When the cam member 28b is disengaged from the arm 29b, the vertical feed shaft 29 is driven to rotate clockwise in FIG. 8 by the spring 61 (the right and left drive arms 29a are driven to swing downward). In this way, the vertical feed shaft 29 is driven to reciprocate (the right and left drive arms 29a are vertically driven to swing).

As shown in FIG. 4 and FIG.
Is provided with five partition portions 14a and four seedling mounting surfaces 14b, and an opening 14d is formed below the seedling mounting surface 14b.
Are formed. One drive shaft 65 is provided under the opening 14d, and the drive pulley 66 is connected to the opening 14d.
It is fixed to the drive shaft 65 so as to enter d.

As shown in FIG. 4 and FIG.
Is provided with a downwardly facing U-shaped holding portion 14c on the back surface thereof.
The driven shaft 67 is inserted into the holding portion 14 c, and a spring 68 is provided between the driven shaft 67 and the horizontal frame 64 to support the driven shaft 67. Driven pulley 69
Is externally fitted to the driven shaft 67 so as to enter the opening 14d. A wide vertical feed belt 70 having a large number of convex portions 70a on its surface is provided one by one on the seedling mounting surface 14b.
It is wound around 6, 69 and arranged in the opening 14d.
As shown in FIGS. 3, 4, and 5, the seedling rest 14 (drive shaft 6
7) A one-way clutch 71 is externally fitted at the left and right center of
A driven arm 71a is provided for the one-way clutch 71, and the driven arm 71a is connected to the right and left drive arms 29a.
a.

With the above structure, as described in the preceding item [5], when the seedling pedestal 14 reaches the right (left) movement limit as the seedling pedestal 14 is driven to reciprocate laterally to the left and right. ,
When the driven arm 71a reaches the position of the right (left) drive arm 29a, the driven arm 71a is operated upward by the right (left) drive arm 29a, and the drive shaft 65, the drive pulley 66 and The vertical feed belt 70 is rotated by a predetermined angle clockwise in FIG.
a (guide rail 62).

[7] Next, the support structure of the center float 15 and the side float 16 will be described. As shown in FIGS. 2 and 17, a pipe-shaped support shaft 72 is rotatably supported by the right and left support plates 37, and an arm 72a fixed to the support shaft 72 extends obliquely rearward and downward. . A spring 73 that urges the front portions of the center float 15 and the side floats 16 in the lifting direction is supported by the rear portions of the center floats 15 and the side floats 16 so as to be vertically swingable around the horizontal axis P4 at the rear portion of the arm 72a. The front case of the center float 15 and the side float 16 can be moved up and down freely.
0 and the support case 11.

As shown in FIG. 2, an operation lever 74 attached to the support shaft 72 extends toward the driver's seat 5, and the operation lever 74 can be operated up and down and fixed at a desired position. ing. Thereby, the operation lever 74
Is operated up and down, and the support shaft 72 is rotated to operate the arm 7.
By swinging the 2a up and down, the position of the rear part of the center float 15 and the side float 16 with respect to the seedling planting device 9 (the position of the horizontal axis P4) can be changed up and down. The planting depth of the seedling by the attached arm 13 can be changed.

As shown in FIGS. 14 and 16, in the right and left planting cases 12, an opening 12g is formed at the rear end portion due to a mold and the like. A lid member 75 for closing the opening 12g is attached to the rear end of the planting case 12 by a bolt 76, and a stopper 75a is formed integrally with the lid member 75, as shown in FIGS. The stopper 75a extends downward. The right and left planting cases 12 are located above the right and left side floats 16 and below the stopper 75a, the horizontal axis P4.
The right and left side floats 16 on the rear side are located.

With the above structure, when the seedling planting device 9 is largely driven upward from the rice field and the front portion of the side float 16 swings downward around the horizontal axis P4, the rear side of the horizontal axis P4 Of the side float 16 contacts the stopper 75a, and the downward swing of the front portion of the side float 16 is stopped at a predetermined position.

[First Embodiment of the Invention] FIGS. 3 and 6
In the structure shown in FIG. 5, the feed case 10 and the right and left support cases 11 are formed as separate members and are connected by the stud bolts 30 and the nuts 31.
As shown in FIG.
The right support case 11 is integrally formed on the OR and extends in the right lateral direction, and the left support case 11 is integrally formed on the left portion 10L of the feed case 10 and extends in the left lateral direction. You may comprise. In this case, feed case 10
Of the right and left portions 10R and 10L are positioned at the center line CL, the distance L from the center line CL to the end of the right support case 11 and the center line C
The distance L from L to the end of the left support case 11 is the same.

[Second Alternative Embodiment of the Invention] FIGS.
In the bearing member 36 shown in FIGS.
19 and 20, the bearing member 36 may be formed with an open portion 36i at the bridge portion 36d as shown in FIGS. Next, when the opening 36i is formed in the bearing member 36, the planting case 12 and the bearing member 3
6 will be described.

As shown in FIG. 19, the transmission shaft 26 is disposed inside the right and left support cases 11 from the feed case 10, and the end of the transmission shaft 26 projects from the end of the support case 11. A bevel gear 32 is fixed to an end of the shaft 26 at a position protruding from an end of the support case 11. A plurality of stud bolts 33 are attached to the end of the support case 11 along the axial direction of the transmission shaft 26. In the right and left planting cases 12, first and second openings 12a and 12b are formed on the left and right sides of the front end, and a plurality of bolt insertion holes 12c are formed. A transmission shaft 34 is arranged inside the planting case 12, and an end of the transmission shaft 34 is arranged so as to be located between the first and second openings 12 a and 12 b. , A bevel gear 35 is fixed.

In the above state, as shown in FIG. 19, the planting case 12 is moved from the left side of the drawing to the right side of the drawing to insert the stud bolt 33 into the bolt insertion hole 12c.
The transmission shaft 26 is inserted into the opening 12a and the bevel gear 3
2,35 is occluded. In this state, the end of the transmission shaft 34 faces the side surface of the transmission shaft 26, and the planting case 12 is temporarily held on the support case 11 by the stud bolt 33.

Next, with the planting case 12 temporarily held by the support case 11 by the stud bolts 33, the bearing member 36 is inserted from the second opening portion 12b into the through hole 36c of the first sliding bearing portion 36a. The first slide bearing 36a is inserted into the end of the transmission shaft 26, the first slide bearing 36a is fitted to the transmission shaft 26, and the projection 36g of the first slide bearing 36a is inserted into the recessed locking portion 12d of the planting case 12. . Along with this, the transmission shaft 34 is inserted into the opening 36i of the second sliding bearing 36b from the lateral side intersecting with the axial center direction of the transmission shaft 34,
The bevel gear 35 is connected to the first and second sliding bearings 36a, 3a.
6b, the transmission shaft 34 is fitted into the recess 36e of the second sliding bearing 36b. The support plate 37 is applied to the second opening 12b, and the nut 38 is connected to the stud bolt 33.
The support plate 37 is connected to the support case 11 so as to sandwich the planting case 12.

In the state shown in FIG. 19, the convex portion 36g of the first sliding bearing portion 36a is engaged with the locking portion 12 of the planting case 12.
d (see FIG. 10), the planting case 12
Of the projection 12e of FIG.
), The point that the second slide bearing portion 36b is in contact with the inner wall of the planting case 12, and the protrusion 3 of the first slide bearing portion 36a.
The bearing member 36 is supported so as not to move by the point that the convex portion 36h of the connecting portion 36f contacts the support plate 37.

As shown in FIGS. 3, 6, and 19, the ball bearing 39 of the left portion 10L of the feed case 10 and the bearing member 36 (the first
The transmission shaft 26 is supported by the slide bearing 36a). As shown in FIGS.
By 0, the transmission shaft 34 is supported.

[Third Alternative Embodiment of the Invention] The bearing members 36 of the above-described [Embodiment of the Invention] and [Second Alternative Embodiment of the Invention] are not resin but integrated with metal (for example, aluminum). May be formed. With this configuration, in the second slide bearing 36b shown in FIG.
It is necessary to set the width of the opening 36i to be the same as the width of the recess 36e. Further, the bearing member 36 may be configured to be attached to the transmission shaft 34 (bevel gear 42) and the drive shaft 41 (bevel gear 43) shown in FIG.

[0073]

According to the first aspect of the present invention, in the seedling planting apparatus of the rice transplanter, when the feed case, the support case, and the planting case are provided, the bevel gear of the upper transmission shaft and the lower transmission shaft are provided. By providing a bearing member integrally provided with first and second sliding bearing portions that support the upper and lower transmission shafts at a portion where the bevel gears mesh with each other, the number of mounting portions of the bearing members is reduced. This is advantageous in terms of simplification of the structure of the seedling planting apparatus. According to the features of the first aspect, the mold for producing the bearing member is not so complicated, and it is not necessary to separately prepare the mold for producing the first and second sliding bearing portions. This is further advantageous in terms of simplifying the structure of the seedling planting apparatus.

According to the features of the second aspect, the "effect of the invention" of the first aspect is provided similarly to the case of the first aspect. In addition to the "effect of the invention", the following "invention" is provided. Of the effect. According to the feature of claim 2, along one axial direction of the upper and lower transmission shafts,
While inserting and inserting the first sliding bearing portion into one of the upper and lower transmission shafts, from the lateral side intersecting with the other axial center direction of the upper and lower transmission shafts, The second sliding bearing can be easily fitted into the other of the upper and lower transmission shafts through the opening, so that the workability of mounting the bearing member can be improved.

According to the feature of the third aspect, the "effect of the invention" of the second aspect is provided similarly to the case of the second aspect, and in addition to the "effect of the invention", the following "invention" is provided. Of the effect. According to the feature of claim 3, the bearing member can be inserted and attached from the opening of the planting case while the planting case is temporarily held in the support case by the stud bolt, and the direction of the planting case changes. As a result, a situation in which the mounting of the bearing member becomes difficult is not caused, so that the workability of mounting the bearing member can be improved.

According to a fourth aspect of the present invention, in the seedling planting apparatus of the rice transplanter, when the feed case, the right and left support cases, and the right and left planting cases are provided, the feed case is connected to the seedling planting apparatus. The right and left support cases can be shared by arranging them in the center on the left and right sides, which is advantageous in terms of simplifying the structure of the seedling planting apparatus. According to the feature of claim 4, since the transmission mechanisms arranged inside the right and left support cases can be configured symmetrically, it is further advantageous in terms of simplifying the structure of the seedling planting device. It will be.

According to a fifth aspect of the present invention, in the seedling planting apparatus of the rice transplanter, when the feed case, the right and left support cases, and the right and left planting cases are provided, the feed case is moved to the right and left portions. The feed case (right portion) is formed by integrally forming the right support case on the right portion of the feed case and the left support case integrally on the left portion of the feed case. And the left side portion), there is no need for bolts and nuts for connecting to the right and left support cases, which is advantageous in terms of simplifying the structure of the seedling planting apparatus. According to the features of claim 5, the point that the right and left support cases can be formed in a similar shape, and the transmission mechanism disposed inside the right and left support cases is configured to be symmetrical. Becomes more advantageous in terms of simplification of the structure of the seedling planting apparatus.

According to a sixth aspect of the present invention, in the seedling planting apparatus for a rice transplanter, when a feed case, a support case, and a planting case are provided, a cover member is attached to an open portion at a rear portion of the planting case. A member is provided with a stopper, and the stopper abuts on the portion of the grounding float behind the horizontal axis of the support member, so that the downward swing of the front part of the grounding float is stopped at a predetermined position. By,
There is no need to provide a dedicated member for supporting the stopper, which is advantageous in terms of simplifying the structure of the seedling planting apparatus.

According to a seventh aspect of the present invention, in the seedling planting apparatus for a rice transplanter, when the vertical feed mechanism and the input portion of the vertical feed mechanism, the feed case, the vertical feed shaft, and the drive arm are provided, the feed case is connected to the seedling. Arranged in the center of the left and right of the planting device,
Extend the vertical feed shaft to the right and left from the feed case,
Equipped with drive arms at the right and left ends of the vertical feed shaft, and by providing the input portion of the vertical feed mechanism at the center of the left and right of the seedling rest, the right and left components can be shared. This is advantageous in terms of simplifying the structure of the seedling planting device.

According to the eighth aspect of the present invention, in the seedling planting apparatus of the rice transplanter, when the ring member made of the elastic material is externally fitted to the seedling pushing tool, the end surface of the ring member on the inner wall side of the planting arm is provided with: By providing the radial groove reaching the outer end of the ring member, it is possible to reduce the state in which grease is pushed into the insertion hole of the seedling extruder in the planting arm by the pressing action of the ring member, and the planting arm In this case, it is possible to reduce the state in which grease comes out of the planting arm through the insertion hole of the seedling extruder in the above, and it was possible to prevent a decrease in durability due to a shortage of grease. According to the feature of claim 8, the groove portion is formed on the end surface of the ring member on the inner wall side of the planting arm more than the inner wall of the planting arm (the portion around the insertion hole of the seedling extruding tool in the planting arm). Since it is easy to perform, it is advantageous in terms of productivity.

[Brief description of the drawings]

FIG. 1 is an overall side view of a riding rice transplanter.

FIG. 2 is an overall side view of the seedling planting apparatus.

FIG. 3 is a plan view of the vicinity of a feed case, a support case, and a planting case in the seedling planting apparatus.

FIG. 4 is a longitudinal side view of the vicinity of a seedling stand and a vertical feed belt in the seedling planting apparatus.

FIG. 5 is a rear view of a seedling mounting stand in the seedling planting apparatus.

FIG. 6 is a cross-sectional plan view near the input shaft, the planting clutch, and the transmission shaft in the feed case and the support case.

FIG. 7 is a cross-sectional plan view of the feed case in the vicinity of a horizontal feed axis and a vertical feed axis.

FIG. 8 is a longitudinal sectional side view of the feed case in the vicinity of a horizontal feed axis and a vertical feed axis.

FIG. 9 is a cross-sectional plan view of the vicinity of a connection portion between the support case and the planting case.

FIG. 10 is a vertical side view of the vicinity of a connection portion between the support case and the planting case.

FIG. 11 is a side view of a bearing member.

12 is a rear view of the bearing member as viewed from the right side in FIG. 11;

FIG. 13 is a cross-sectional view of the bearing member as viewed from the AA direction of FIG. 11;

FIG. 14 is a cross-sectional plan view of the rear end of the planting case and the planting arm.

FIG. 15 is a longitudinal sectional side view of the planting arm and a front view of an end surface of the ring member on the inner wall side of the planting arm.

FIG. 16 is a longitudinal sectional side view of the vicinity of the rear end of the planting case and the lid member.

FIG. 17 is a longitudinal side view of the vicinity of the rear part of the center float and the side float.

FIG. 18 is a plan view showing the vicinity of a feed case and a support case according to the first alternative embodiment of the present invention;

FIG. 19 is a cross-sectional plan view showing the vicinity of a connection portion between a supporting case and a planting case according to a second modification of the present invention.

FIG. 20 is a rear view of a bearing member according to a second modification of the present invention;

[Explanation of symbols]

 9 Seedling plant 10 Feed case 10R Right part 10L Left part 11 Support case 12 Planting case 12a, 12b Opening 12c Bolt insertion hole 12g Opening 13 Planting arm 14 Planting stand 14b Planting surface 16 Ground float 26 Good Side transmission shaft, transmission mechanism 29 vertical feed shaft 29a drive arm 32, 35 bevel gear 33 stud bolt 34 lower side transmission shaft, transmission mechanism 36 bearing member 36a first sliding bearing portion 36b second sliding bearing portion 36i opening 46 planting Claws 47 Seedling pushing tool 50, 53 Cam mechanism 52 Spring 54 Ring member 54b Groove 70 Vertical feed mechanism 71 Input unit 72a Support member 75 Cover member 75a Stopper P4 Horizontal axis

Claims (8)

[Claims] 1. A feed case to which power is transmitted from an airframe, a support case extending right and left laterally from the feed case, and a planting arm extending rearward from the support case and attached to a rear portion. And a power transmission system from the feed case or the support case or the feed case disposed inside the planting case to the planting arm. And a bevel gear of the lower transmission shaft, the first sliding bearing portion supporting one of the upper and lower transmission shafts, and a portion of the upper and lower transmission shafts. A seedling planting device for a rice transplanter, comprising a bearing member integrally provided with a second sliding bearing portion for supporting the other. 2. The upper side and the lower side of the transmission shaft are arranged such that the other end of the upper side and the lower side of the transmission shaft is opposed to one side surface of the upper side and the lower side of the transmission shaft. The bevel gear of the power transmission shaft and the bevel gear of the lower power transmission shaft are engaged with each other, and the open portion that can be fitted from the lateral side that intersects the axis direction of the other of the upper and lower power transmission shafts, Second
In preparation for a sliding bearing portion, the first sliding bearing portion is fitted to one of the upper and lower transmission shafts along the axial direction of one of the upper and lower transmission shafts. The second sliding bearing portion is fitted to the other of the upper and lower transmission shafts from a lateral side that is possible and intersects with the axis of the other of the upper and lower transmission shafts. The seedling planting apparatus for a rice transplanter according to claim 1, wherein the apparatus is configured to be capable of being used. 3. The upper transmission shaft is disposed inside the support case, and is protruded from an end of the support case on the planting case side. A stud bolt is provided along the axial direction of the upper transmission shaft, and the lower transmission shaft is disposed inside the planting case,
A bolt insertion hole and an opening are provided at an end of the planting case on the support case side, the stud bolt is inserted into the bolt insertion hole of the planting case, and the upper transmission shaft is connected to the planting case. The bevel gear of the upper transmission shaft and the bevel gear of the lower transmission shaft are configured to be able to engage with each other, and the bearing member is inserted through the opening of the planting case, and The seedling planting of the rice transplanter according to claim 2, wherein one sliding bearing portion can be fitted to the upper transmission shaft, and the second sliding bearing portion can be fitted to the lower transmission shaft. apparatus. 4. A feed case to which power is transmitted from an airframe is disposed at the center of the right and left sides of the seedling planting device. A power transmission mechanism disposed inside the right and left support cases, by extending a planting case having a planting arm to the rear from the right and left support cases; and A seedling planting device for a rice transplanter, which is configured to transmit the power to the planting arm via a transmission mechanism disposed inside a planting case. 5. A feed case, to which power is transmitted from an airframe, is disposed at the center of the right and left sides of the seedling planting device, and the feed case is formed into a divided structure of a right part and a left part. And a left support case is integrally formed on a left portion of the feed case to extend in the left lateral direction, and is planted at a rear portion. A planting case equipped with an arm, configured to be connectable to the ends of the right and left support cases, and a transmission mechanism disposed inside the right and left support cases for power of the feed case; and A seedling planting apparatus for a rice transplanter, wherein the seedling is transmitted to the planting arm via a transmission mechanism disposed inside the planting case. 6. A feed case to which power is transmitted from an airframe, a support case extending right and left laterally from the feed case, and an arm planted rearward from the support case and planted at a rear portion. And a planting case comprising: a grounding float that is vertically swingable around a horizontal axis of the support case or a support member provided in the planting case, and a rear part of the planting case. A stopper that attaches a lid member to the opening and stops the downward swing of the front part of the ground float at a predetermined position by contacting the ground float on the rear side of the horizontal axis of the support member. A seedling planting device for a rice transplanter provided in the lid member. 7. A feed case to which power is transmitted from an airframe is disposed in the center of the right and left sides of the seedling planting device, and a vertical feed shaft is protruded right and left from the feed case. A drive arm is provided at the left end, and a vertical feeding mechanism for seedlings is provided on each of the seedling mounting surfaces of the seedling mountings that are driven to reciprocate laterally to the left and right, and an input portion of the vertical feeding mechanism is provided for the seedling mountings. Providing at the center in the left and right, the seedling rest is reciprocatingly laterally driven to the right and left, and when the seedling rest reaches the right or left movement limit, the input part of the vertical feed mechanism is the right or left. An apparatus for planting seedlings for a rice transplanter, wherein the right or left drive arm reaches the position of a drive arm, and the input portion of the vertical feed mechanism is driven to drive the vertical feed mechanism. 8. A planting arm comprising a planting claw and a slidable seedling pushing-out tool, wherein the seedling pushing-out tool is inserted into the planting arm, and the seedling pushing-out tool is urged to the projecting side. A spring and a cam mechanism that slides the seedling pushing tool inside the planting arm against the spring and allows the spring to slide the seedling pushing tool to the projecting side. When a ring member made of an elastic material is externally fitted to the seedling pushing tool inside the planting arm, and the spring is slid to the projecting side by the spring, the cam mechanism is moved. Alternatively, the seedling extruding tool presses the ring member against the inner wall of the planting arm so as to stop the sliding operation of the seedling extruding tool toward the projecting side, and the planting in the ring member is performed. On the inner wall side end face of the arm with
A seedling planting apparatus for a rice transplanter, comprising a radial groove reaching an outer end of the ring member.