JP7023219B2 - Seedling planting equipment and transplanting machine - Google Patents

Description

The present invention relates to a seedling planting device and a transplanting machine provided with the seedling planting device.

For example, Patent Document 1 describes a passenger-type rice transplanter provided with a seedling planting device. The seedling planting device is arranged so as to face the seedling loading table where the seedlings are placed on the seedling placing portion and reciprocated in the lateral direction of the machine, and the seedling loading surface of the seedling placing portion, and is placed on the seedling placing portion. It is equipped with a seedling stay that suppresses the floating of the placed seedlings.

Japanese Unexamined Patent Publication No. 2014-103915

Since the seedling stand is reciprocated in the lateral direction of the machine body, it is preferable that the weight is small. Here, the member that supports the seedling stay on the seedling stand is generally made of metal, and its weight is relatively large, and there is room for improvement in this respect. Further, the transplanting machine may be used in a field such as a wet field where running power is required, and it is required to reduce the weight of the machine.

In view of the above-mentioned circumstances, an object of the present invention is to provide a means for reducing the weight of the seedling stand and the transplanting machine.

The seedling planting apparatus of the present invention has a seedling stand in which seedlings are placed on the seedling placing portion and is reciprocated in the lateral direction of the machine, and the seedlings placed on the seedling stand are vertically oriented toward the seedling take-out port. A seedling vertical feeding device for feeding, a seedling planting mechanism for planting seedlings from the seedling take-out port into a field, and seedlings placed facing the seedling loading surface of the seedling placing portion and placed in the seedling placing portion. It is characterized by including a seedling stay that suppresses floating and a resin lower support portion that supports the lower end portion of the seedling stay on the seedling stand.

According to this characteristic configuration, since the lower support portion is made of a relatively lightweight resin, the weight of the seedling stand can be reduced. When the weight of the seedling stand is reduced, there is an advantage that the durability of the seedling planting device, particularly the support mechanism of the seedling stand, can be improved, and the power required for the reciprocating movement of the seedling stand can be reduced.

In the present invention, the lower support portion includes a pair of side wall portions having a groove into which the lower end portion of the seedling stay is inserted, and a rear wall portion connecting the pair of the side wall portions. It is preferable that the wall portion is provided with a rear wall through hole extending in a direction orthogonal to the lateral direction of the machine body.

According to this configuration, water or mud that has entered between the pair of side wall portions can be discharged to the outside of the lower support portion through the rear wall through hole. That is, it is possible to prevent water and mud from accumulating in the lower support portion.

In the present invention, it is preferable that the rear wall portion includes ribs extending from one side wall portion to the other side wall portion.

Since the pair of side wall portions are provided with grooves, the strength is relatively low. According to this configuration, since the side wall portion provided with the groove is reinforced by the rib, the strength of the side wall portion and the rear wall portion is increased, which is preferable.

In the present invention, the lower support portion has a mounting through hole into which a mounting bolt is inserted, and the lower wall portion that abuts on the seedling stand and the lower wall portion that sandwiches the lower wall portion on both sides in the lateral direction of the machine body. It is preferable that a pair of lower side wall portions provided is provided, and at least one of the pair of lower side wall portions is provided with a side wall through hole extending laterally to the machine body and through which the mounting bolt can pass.

According to this configuration, when the mounting bolt is inserted into the mounting through hole, the mounting bolt can be guided to the mounting through hole through the side wall through hole. This eliminates the need for the mounting bolts to pass between the pair of lower side walls, so that the distance between the pair of lower side walls can be reduced and the lower support can be compactly formed.

In the present invention, the lower support portion is provided with a seedling holding rod that extends laterally to the machine body, is supported by the lower support portion, and presses the lower end portion of the seedlings placed on the seedling placing portion. It is preferable that the rear side wall portion provided with the rear through hole into which the seedling holding rod is inserted is provided, and the end portion of the seedling holding rod is provided with a bent portion that abuts on the rear side wall portion.

In the conventional seedling planting device, the seedling holding rod is prevented from coming off from the lower support portion by inserting a pin into the seedling holding rod. According to this configuration, since the bent portion of the end portion of the seedling holding rod comes into contact with the rear side wall portion, it is possible to prevent the seedling holding rod from coming off without using a member such as a pin. Therefore, it is preferable that the structure for fixing the seedling holding rod is simple and the work procedure such as attachment / detachment and adjustment of the seedling holding rod is simple.

In the present invention, it is preferable that the lower support portion has a holding portion that abuts on the bent portion that is in contact with the rear side wall portion and holds the bent portion.

According to this configuration, the bent portion of the seedling holding rod and the holding portion of the lower support portion can prevent the seedling holding rod from coming off and hold the seedling holding rod without using a member such as a pin. Therefore, the structure for fixing the seedling holding rod becomes simpler, and the work procedure such as attaching / detaching and adjusting the seedling holding rod becomes simpler, which is preferable.

In the present invention, it is preferable that the lower support portion having the same shape is arranged at least at the left end portion and the right end portion of the seedling stand.

According to this configuration, since the seedling stay is supported by the lower support portion having the same shape, the types of parts constituting the seedling planting device can be reduced, and the manufacturing cost of the seedling planting device can be reduced. ..

The transplanting machine of the present invention is characterized by comprising the above-mentioned seedling planting device.

According to this characteristic configuration, since the lower support portion is made of a relatively lightweight resin, the weight of the seedling stand can be reduced. When the weight of the seedling stand is reduced, there is an advantage that the durability of the seedling planting device, particularly the support mechanism of the seedling stand, can be improved, and the power required for the reciprocating movement of the seedling stand can be reduced. In addition, it is possible to improve the running power in fields such as wet fields.

It is a left side view of a passenger-type rice transplanter. It is a rear view of a seedling stand. It is a side view of a seedling planting apparatus. It is an exploded perspective view of a seedling stay. It is sectional drawing which shows the connection structure of a main rod and a support member. It is a figure which shows the support structure of the seedling stay by the lower support part. It is a front view of the lower support part. It is a right side view of the lower support part. It is a rear view of the lower support part. It is a top view of the lower support part. It is a right side view of the lower support part attached to a seedling stand. 6 is a cross-sectional view taken along the line XII-XII of FIG.

FIG. 1 shows an overall aspect of a passenger-type rice transplanter (an example of a “porting machine”) equipped with a seedling planting device according to the present invention. In each drawing, F indicates the front direction of the machine body, B indicates the rear direction of the machine body, U indicates the upward direction of the machine body, and D indicates the downward direction of the machine body. R indicates the right direction of the aircraft, and L indicates the left direction of the aircraft.

(Overall configuration of passenger rice transplanter)
As shown in FIG. 1, in a passenger-type rice transplanter, a hydraulic cylinder 5 for raising and lowering a link mechanism 4 and a link mechanism 4 at the rear of a machine body 3 provided with right and left front wheels 1 and right and left rear wheels 2. A four-row planting type seedling planting device 6 is supported at the rear of the link mechanism 4.

A fertilizer application device 7 for supplying fertilizer to the rice field surface is provided over the rear part of the machine body 3 and the seedling planting device 6, and a ground leveling device 8 for leveling the rice field surface is supported at the lower part of the front part of the seedling planting device 6. There is.

(Structure of seedling planting device)
As shown in FIG. 1, two planting transmission cases 9 arranged at intervals in the left-right direction in the seedling planting device 6, and rotation supported by the right portion and the left portion of the rear portion of the planting transmission case 9. A planting arm 11, a float 12, a seedling stand 13 and the like supported at both ends of the case 10 and the rotating case 10 are provided.

As shown in FIG. 2, the seedling placing table 13 is provided with a seedling placing portion 13a divided into four places by a wall-shaped partition portion 13b so as to place a mat-shaped seedling for one row. That is, in the present embodiment, the seedling stand 13 is configured for four-row planting. Each seedling mounting portion 13a includes a seedling mounting surface 13c formed on an inclined surface from the front upper side to the rear lower side.

Each seedling placing portion 13a is provided with a pair of left and right seedling vertical feeding devices 21. In the seedling vertical feeding device 21, when the seedling loading table 13 reaches the stroke end of the reciprocating lateral feeding drive, the seedlings mounted on the seedling loading portion 13a are fed by a predetermined amount toward the seedling extraction port 13d at the lower end. It is configured to drive the vertical feed belt to feed the seedlings vertically.

When the power is transmitted to the seedling planting device 6, the seedling stand 13 is driven laterally, the rotary case 10 is rotationally driven, and the planting arm 11 takes out the seedlings from the lower part of the seedling stand 13 and plants them on the rice field surface. ..

(Configuration of fertilizer application device)
As shown in FIG. 1, the fertilizer application device 7 is provided with a hopper 15, a feeding portion 16, a blower 17, a groove making device 18, a hose 19, and the like.

In the machine body 3, a hopper 15 for storing fertilizer and a feeding portion 16 are supported on the rear side of the driver's seat 20, and a blower 17 is provided on the left lateral side of the feeding portion 16. A grooving device 18 is connected to the float 12, four grooving devices 18 are provided, and four hoses 19 are connected to the feeding portion 16 and the grooving device 18.

The fertilizer of the hopper 15 is fed out by the feeding portion 16 and is supplied to the groove making device 18 through the hose 19 by the transport air of the blower 17. Fertilizer is supplied from 18 to the ditch on the surface of the field.

(Structure of ground leveling device)
As shown in FIGS. 1 and 3, a ground leveling device 8 for leveling the rice field surface is supported in the lower part of the front portion of the seedling planting device 6.

Right and left support cases 8a are supported on the lateral outer side of the right and left planting transmission cases 9 and extend to the front side. A drive shaft (not shown) is supported along the left-right direction over the front of the right and left support cases 8a, and a large number of leveling bodies 8b are attached to the drive shaft. The power transmitted to the seedling planting device 6 is transmitted to the drive shaft via the transmission shaft (not shown) inside the planting transmission case 9 and the transmission chain (not shown) inside the support case 8a. To.

As described in the above (configuration of the seedling planting device), when the power is transmitted to the seedling planting device 6, the power is transmitted from the seedling planting device 6 to the ground leveling device 8, and the ground leveling body 8b is rotationally driven. The ground leveling body 8b is used to level the ground surface.

(Support structure of seedling stand)
As shown in FIG. 3, a support rail 22 is supported along the left-right direction on the upper part of the planting transmission case 9. The lower part of the seedling stand 13 is supported by the support rail 22 so as to be reciprocating along the left-right direction, and the seedling stand 13 extends diagonally to the upper side from the planting transmission case 9 in a side view. ing.

As shown in FIG. 3, the seedling mounting frame 23 on a straight line is connected to the front surface of the support frame 24 and extends diagonally upward from the support frame 24. The support rail 25 is connected to the upper part of the seedling stand 13 and extends in the left-right direction. A roller 26 supported on the upper part of the seedling stand frame 23 is inserted into the support rail 25.

With the above structure, the lower part of the seedling stand 13 is movably supported in the left-right direction by the planting transmission case 9 and the support rail 22, and the upper part of the seedling stand 13 is left and right by the seedling stand frame 23 and the roller 26. Since it is supported so as to be movable in the direction, the seedling mounting table 13 is driven to be reciprocated and laterally fed in the left-right direction with a predetermined stroke.

(Structure of seedling holding rod)
As shown in FIGS. 2 and 3, the seedling planting device 6 includes a seedling holding rod 28 on the seedling loading surface 13c side of the seedling loading table 13. The seedling holding rod 28 presses the lower end portion of the mat-shaped seedling placed on the seedling loading table 13. The seedling holding rod 28 is a long member extending from the right end portion to the left end portion of the seedling mounting table 13 along the left-right direction. Specifically, the seedling holding rod 28 is formed by bending a stainless steel round bar, and a bent portion 28b is formed at the right end portion of a straight rod-shaped straight rod portion 28a. The seedling holding rod 28 is supported by a lower support portion 50, which will be described later.

(Composition of seedling stay)
As shown in FIGS. 1, 2, and 3, the seedling planting device 6 includes a seedling stay 30 on the seedling loading surface 13c side of the seedling loading table 13. The seedling stay 30 suppresses a phenomenon (floating phenomenon) in which the middle portion of the mat-shaped seedlings placed on the seedling loading table 13 bulges toward the side away from the seedling loading surface 13c, and is subjected to the seedling vertical feeding device 21. The seedling planting device 6 is provided for the purpose of ensuring that the seedlings are fed vertically. Further, the seedling stay 30 also has a function of suppressing the mat-shaped seedlings from shifting in the left-right direction when the seedling rest 13 moves in the lateral direction of the machine body.

As shown in FIG. 2, in the present embodiment, a pair of left and right seedling stays 30 are provided in the seedling planting device 6. As shown in FIGS. 2 and 6, one seedling stay 30 includes six main rods 31, an upper connecting member 32, a lower connecting member 33, and two end members 34. One seedling stay 30 is arranged over two seedling placing portions 13a. Three main rods 31 are arranged corresponding to one seedling placing portion 13a, and two main rods 31 at both ends of the three main rods 31 face the vertical feed belt of the seedling vertical feed device 21. Are arranged.

The main rod 31 is a long member extending along the vertical feeding direction of the mat-shaped seedlings. Specifically, as shown in FIG. 4, the main rod 31 is formed by bending a stainless steel round bar, and an upward lateral portion 31a is formed in the upper portion and a downward lateral portion 31b is formed in the lower portion.

The upper connecting member 32 and the lower connecting member 33 are rod-shaped members extending in the left-right direction, which are formed by extruding aluminum. The upper connecting member 32 includes a connecting portion 32a formed in a U shape (channel shape) in a cross-sectional view. Similarly, the lower connecting member 33 includes a connecting portion 33a formed in a U shape (channel shape) in a cross-sectional view.

As shown in FIG. 5, the upward lateral portion 31a of the main rod 31 is inserted into the connecting portion 32a of the upper connecting member 32 and is connected by caulking from the outside. The downward lateral portion 31b of the main rod 31 is inserted into the connecting portion 33a of the lower connecting member 33 and is connected by caulking from the outside. As described above, the six main rods 31 and the upper connecting member 32 and the lower connecting member 33 are connected to each other.

As shown in FIGS. 6, 11, and 12, the end member 34 is a member including a lateral portion 34a and an annular portion 34b formed by bending a stainless steel round bar. The lateral portion 34a of the end member 34 is inserted into the connecting portion 33a of the lower connecting member 33 and is connected by caulking from the outside, similarly to the downward lateral portion 31b of the main rod 31. The end member 34 is arranged at both ends of the lower connecting member 33.

(Support structure of seedling stay)
As shown in FIG. 2, the seedling mounting table 13 of the seedling planting device 6 includes three upper support portions 40 and three lower support portions 50. The upper support portion 40 supports the upper connecting member 32 of the seedling stay 30 on the seedling mounting table 13. The three upper support portions 40 are provided at the left end portion, the right end portion, and the center portion of the seedling stand 13 in the upper part of the seedling stand 13. The lower support portion 50 supports the lower connecting member 33, which is the lower end portion of the seedling stay 30, on the seedling mounting table 13. The lower support portion 50 is provided at the left end portion, the right end portion, and the center portion of the seedling loading table 13 at the lower end portion of the seedling loading table 13. The lower support portion 50 provided at the left end portion, the right end portion, and the center portion of the seedling stand 13 is a member having the same shape.

As shown in FIG. 3, the upper support portion 40 includes a support member 41 and a holding member 42. The support member 41 is a member having a prismatic upper portion and is attached to the seedling mounting table 13. The holding member 42 is a member attached to the support column member 41 so that the position can be changed, and includes a recess 42a into which the upper connecting member 32 of the seedling stay 30 is inserted.

As shown in FIGS. 2 and 3, the right end portion of the upper connecting member 32 of the seedling stay 30 on the right side is supported by the upper support portion 40 on the right side. The left end of the upper connecting member 32 of the seedling stay 30 on the right side is supported by the central upper support portion 40. The right end of the upper connecting member 32 of the seedling stay 30 on the left side is supported by the upper support portion 40 in the center. The left end portion of the upper connecting member 32 of the seedling stay 30 on the left side is supported by the upper support portion 40 on the left side. As described above, the upper portions of the left and right seedling stays 30 are supported by the upper support portion 40.

The lower support portion 50 will be described with reference to FIGS. 7, 8, 9, and 10. Here, in a state where the lower support portion 50 is attached to the seedling stand 13, the lower wall portion 54 is in a posture along the surface of the seedling stand 13, and the holding portion 56 is in a posture as shown in FIGS. 3 and 11. The protruding direction is diagonally backward and downward. However, in the following description of the shape of the lower support portion 50 according to FIGS. 7, 8, 9, and 10, the direction in which the lower wall portion 54 is downward and the holding portion 56 protrudes from the rear wall portion 53 is A state in which the lower support portion 50 is arranged on a horizontal plane so as to be in the rear direction will be described. That is, in FIGS. 7, 8, 9, and 10, X1 indicates the front direction of the lower support portion 50, X2 indicates the rear direction of the lower support portion 50, and Y1 indicates the left side of the lower support portion 50. Y2 indicates the direction, Y2 indicates the right direction of the lower support portion 50, Z1 indicates the upward direction of the lower support portion 50, and Z2 indicates the downward direction of the lower support portion 50.

The lower support portion 50 is a resin member of the right side wall portion 51 (an example of the “side wall portion” and the “lower side wall portion”) and the left side wall portion 52 (“side wall portion” and “lower side wall portion”). (Example), a rear wall portion 53, a lower wall portion 54, a rear side wall portion 55, and a holding portion 56 are provided.

The right side wall portion 51 is a wall-shaped portion located on the right side of the lower support portion 50. The lower end of the right side wall 51 is connected to the right end of the lower wall 54. The rear end portion of the right side wall portion 51 is connected to the right end portion of the rear wall portion 53. The right side wall portion 51 is orthogonal to the rear wall portion 53 and the lower wall portion 54. The right side wall portion 51 includes four grooves 51a and a side wall through hole 51b.

The groove 51a is a U-shaped groove formed in the upper part of the right side wall portion 51 and extending backward from the front surface of the right side wall portion 51. In other words, the groove 51a is a U-shaped notch formed from the right side surface to the left side surface of the right side wall portion 51.

The side wall through hole 51b is a through hole formed in the lower part of the right side wall portion 51 and penetrates the right side wall portion 51 from the right side surface to the left side surface. The side wall through hole 51b has a shape through which the mounting bolt B inserted into the second mounting through hole 54b of the lower wall portion 54 can pass.

The left side wall portion 52 is a portion having the same shape as the right side wall portion 51. The left side wall portion 52 is a wall-shaped portion located on the left side of the lower support portion 50. The lower end of the left side wall 52 is connected to the left end of the lower wall 54. The rear end portion of the left side wall portion 52 is connected to the left end portion of the rear wall portion 53. The left side wall portion 52 is orthogonal to the rear wall portion 53 and the lower wall portion 54. The left side wall portion 52 includes four grooves 52a and a side wall through hole 52b.

The groove 52a is a U-shaped groove formed in the upper part of the left side wall portion 52 and extending backward from the front surface of the left side wall portion 52. In other words, the groove 52a is a U-shaped notch formed from the left side surface to the left side surface of the left side wall portion 52.

The side wall through hole 52b is a substantially rectangular through hole formed in the lower part of the left side wall portion 52 and penetrates the left side wall portion 52 in the left-right direction. The side wall through hole 52b has a shape through which the mounting bolt B inserted into the second mounting through hole 54b of the lower wall portion 54 can pass.

The rear wall portion 53 is a wall-shaped portion located on the rear side of the lower support portion 50. The lower end of the rear wall portion 53 is connected to the lower wall portion 54. The right end of the rear wall 53 is connected to the rear end of the right wall 51. The left end of the rear wall 53 is connected to the rear end of the left wall 52 and the front end of the rear side wall 55. The rear wall portion 53 is orthogonal to the right side wall portion 51, the left side wall portion 52, the lower wall portion 54, and the rear side wall portion 55. The rear wall portion 53 includes five rear wall through holes 53a and five ribs 53b.

The rear wall through hole 53a is a substantially rectangular through hole that penetrates the rear wall portion 53 in the front-rear direction. The upper four rear wall through holes 53a are located below the groove 51a of the four right side wall portions 51 (below the groove 52a of the four left side wall portions 52), respectively. The lower end of the lower rear wall through hole 53a is at the same height as the upper surface of the lower wall portion 54.

The rib 53b is a rib that projects forward from the front surface of the rear wall portion 53. The rib 53b is provided from the left side surface of the right side wall portion 51 to the right side surface of the left side wall portion 52. As shown in FIG. 8, in the front-rear direction, the front end of the rib 53b is located in front of the rear end of the groove 51a (groove 52a). In the vertical direction, the uppermost rib 53b is located between the upper end of the right side wall portion 51 and the uppermost groove 51a. The second, third and fourth ribs 53b from the top are located between the grooves 51a. The bottom rib 53b is located between the bottom groove 51a and the side wall through hole 51b.

The lower wall portion 54 is a rectangular plate-shaped member located on the lower side of the lower support portion 50. The right end of the lower wall 54 is connected to the lower end of the right wall 51. The left end portion of the lower wall portion 54 is connected to the lower end portion of the left side wall portion 52 and the lower end portion of the rear side wall portion 55. The lower wall portion 54 is orthogonal to the right side wall portion 51, the left side wall portion 52, the rear wall portion 53, and the rear side wall portion 55. The lower wall portion 54 includes a first mounting through hole 54a and a second mounting through hole 54b.

The first mounting through hole 54a and the second mounting through hole 54b are through holes that penetrate the lower wall portion 54 in the vertical direction. The first mounting through hole 54a is provided at the front end portion of the lower wall portion 54. The first mounting through hole 54a is provided at a position that does not overlap with the right side wall portion 51 (left side wall portion 52) in the front-rear direction. The second mounting through hole 54b is provided in the central portion of the lower wall portion 54. The second mounting through hole 54b is provided at a position overlapping the side wall through hole 51b (side wall through hole 52b) in the front-rear direction.

The rear side wall portion 55 is a wall-shaped portion located on the left side and the rear side of the lower support portion 50. The front end of the rear side wall 55 is connected to the rear end of the left wall 52 and the left end of the rear wall 53. The lower end of the rear side wall 55 is connected to the left end of the lower wall 54. The rear side wall portion 55 is orthogonal to the left side wall portion 52, the rear wall portion 53, and the lower wall portion 54. The rear side wall portion 55 includes three rear through holes 55a, ribs 55b, and holes 55c.

The rear through hole 55a is a through hole that penetrates the rear side wall portion 55 in the left-right direction. The rear through hole 55a is provided below the rib 55b in the lower part of the rear side wall portion 55. The seedling holding rod 28 is inserted into the rear through hole 55a. The three rear through holes 55a are arranged so as to have different distances from the lower wall portion 54.

The rib 55b is a rib protruding to the right from the right side surface of the rear side wall portion 55. The rib 55b is arranged in the central portion of the rear side wall portion 55 between the three rear through holes 55a and the holes 55c. The front end portion of the rib 55b is connected to the rear surface of the rear wall portion 53. The right side surface of the rib 55b is located on the left side surface of the holding portion 56 described later and on the left side of the tip of the protrusion 56a.

The hole 55c is a hole that penetrates the rear side wall portion 55 in the left-right direction. The holes 55c are provided above the ribs 55b in the upper part of the rear side wall portion 55. The holes 55c are formed in a position and shape that overlap with the holding portion 56 in the left-right direction view.

The holding portion 56 is a rectangular flat plate-shaped portion that projects rearward from the right end portion of the rear wall portion 53. The holding portion 56 is located at the center of the upper support portion 40 in the vertical direction. The right side surface of the holding portion 56 is flush with the right side surface of the right side wall portion 51. The left side surface of the holding portion 56 is located to the right of the right side surface of the rib 55b. The holding portion 56 is formed at a position and shape overlapping the holes 55c in the left-right direction view. The holding portion 56 includes two protrusions 56a.

As shown in FIGS. 3 and 11, the lower support portion 50 described above has a posture in which the lower wall portion 54 is along the surface of the seedling stand 13 and the holding portion 56 protrudes diagonally backward and downward. It is attached to the seedling stand 13. In this posture, the rear wall through hole 53a of the rear wall portion 53 extends diagonally upward in the front direction, that is, in a direction orthogonal to the lateral direction of the machine body. The right side wall portion 51 and the left side wall portion 52 are provided on both sides in the lateral direction of the machine body with the lower wall portion 54 interposed therebetween. The side wall through hole 51b and the side wall through hole 52b extend in the lateral direction of the machine body.

To mount the lower support portion 50 on the seedling mounting table 13, insert the mounting bolt B into the first mounting through hole 54a and the second mounting through hole 54b of the lower wall portion 54, and insert the mounting bolt B into the seedling mounting table 13. It is performed by screwing it into the screw hole 13e. The mounting bolt B is inserted into the second mounting through hole 54b by passing the mounting bolt B through the side wall through hole 51b of the right side wall portion 51 or the side wall through hole 52b of the left side wall portion 52.

The lower connecting member 33, which is the lower end of the seedling stay 30, is supported by the lower support portion 50 as follows. As shown in FIGS. 2, 6, 11, and 12, the end member 34 arranged at the right end of the lower connecting member 33 of the seedling stay 30 on the right side is supported by the lower support portion 50 on the right side. Specifically, the lateral portion 34a of the end member 34 is inserted into the groove 52a of the left side wall portion 52 of the lower support portion 50, and the annular portion 34b of the end member 34 is inserted into the right side wall portion 51 and the left side of the lower support portion 50. It is located between the wall and the wall 52. Then, the end member 34 arranged at the left end of the lower connection member 33 of the seedling stay 30 on the right side is supported by the lower support portion 50 in the center. Specifically, the lateral portion 34a of the end member 34 is inserted into the groove 51a of the right side wall portion 51 of the lower support portion 50, and the annular portion 34b of the end member 34 is inserted into the right side wall portion 51 and the left side of the lower support portion 50. It is located between the wall and the wall 52. As described above, the seedling stay 30 on the right side is supported by the lower support portion 50.

The end member 34 arranged at the right end of the lower connection member 33 of the seedling stay 30 on the left side is supported by the lower support portion 50 in the center. Specifically, the lateral portion 34a of the end member 34 is inserted into the groove 52a of the left side wall portion 52 of the lower support portion 50, and the annular portion 34b of the end member 34 is inserted into the right side wall portion 51 and the left side of the lower support portion 50. It is located between the wall and the wall 52. Then, the end member 34 arranged at the left end of the lower connecting member 33 of the seedling stay 30 on the left side is supported by the lower support portion 50 on the left side. Specifically, the lateral portion 34a of the end member 34 is inserted into the groove 51a of the right side wall portion 51 of the lower support portion 50, and the annular portion 34b of the end member 34 is inserted into the right side wall portion 51 and the left side of the lower support portion 50. It is located between the wall and the wall 52. As described above, the seedling stay 30 on the left side is supported by the lower support portion 50.

By changing the groove 51a into which the lateral portion 34a of the end member 34 is inserted, the height of the seedling stay 30 from the seedling mounting surface 13c can be changed. That is, the lower support portion 50 is configured so that the distance between the seedling stay 30 and the seedling mounting surface 13c can be changed.

(Support structure of seedling holding rod)
The lower support portion 50 described above supports the seedling holding rod 28 on the seedling loading table 13 in addition to the seedling stay 30. As shown in FIGS. 6, 11 and 12, the straight rod portion 28a of the seedling holding rod 28 is inserted into the rear through hole 55a of the lower support portion 50 on the right side, the center, and the left side. The bent portion 28b of the seedling holding rod 28 is held by the lower support portion 50 on the right side. Specifically, the bent portion 28b abuts on the rib 55b of the rear side wall portion 55 of the lower support portion 50, and the holding portion 56 of the lower support portion 50 holds the bent portion 28b. In other words, the bent portion 28b is sandwiched between the rib 55b and the holding portion 56. As shown in FIG. 6, the bent portion 28b is located between the two protrusions 56a of the holding portion 56.

When the seedling holding rod 28 is attached to the seedling holding stand 13, the straight rod portion 28a of the seedling holding rod 28 is inserted into the rear through hole 55a from the right side of the seedling holding stand 13. When the bent portion 28b of the seedling holding rod 28 comes into contact with the rear side wall portion 55 of the lower support portion 50, the bent portion 28b is rotated clockwise so as to enter between the rib 55b and the holding portion 56. When the bent portion 28b reaches between the two protrusions of the holding portion 56, the bent portion 28b is held at that position.

By changing the rear through hole 55a into which the straight rod portion 28a of the seedling holding rod 28 is inserted, the height of the seedling holding rod 28 from the seedling mounting surface 13c can be changed. That is, the lower support portion 50 is configured so that the distance between the seedling holding rod 28 and the seedling loading surface 13c can be changed.

(Other embodiments)
(1) In the above embodiment, an example in which a passenger-type rice transplanter is provided with a four-row planting type seedling planting device 6 has been described, but the number of rows of the seedling planting device 6 is not limited to four.

(2) In the above embodiment, an example in which three lower support portions 50 having the same shape are provided on the seedling mounting table 13 of the seedling planting device 6 has been described. The number of the lower support portions 50 is not limited to three, and may be two or four or more. Further, the lower support portions 50 having different shapes may be included in the plurality of lower support portions 50.

(3) In the above embodiment, an example has been described in which one seedling stay 27 includes six main rods 31 and three main rods 31 are arranged in one seedling placing portion 13a. The number of main rods 31 provided in one seedling stay 27 and the number of main rods 31 arranged in one seedling placing portion 13a are not limited to this.

(4) In the above embodiment, the groove 51a and the side wall through hole 51b are provided in the right side wall portion 51, but the groove 51a and the side wall through hole 51b are separated from each other in the lower support portion 50. It may be provided.

(5) In the above embodiment, the rear wall through hole 53a extends in the front diagonally upward direction, which is a direction orthogonal to the lateral direction of the machine body, but extends in another direction as long as it is a direction orthogonal to the lateral direction of the machine body. You may be. For example, it may extend in the vertical direction of the machine body.

(6) In the above embodiment, the rear wall portion 53 is provided with five rear wall through holes 53a and five ribs 53b, but the number of rear wall through holes 53a and ribs 53b is not limited to this. ..

(7) In the above embodiment, the side wall through holes (51b, 52b) are provided in both the right side wall portion 51 and the left side wall portion 52, but the side wall through holes are either the right side wall portion 51 or the left side wall portion 52. It may be provided on one side.

(8) In the above embodiment, the rear side wall portion 55 is provided with three rear through holes 55a, but the number of the rear through holes 55a is not limited to this.

The present invention can be applied not only to a passenger-type rice transplanter but also to a walking-type rice transplanter.

6: Seedling planting device 11: Planting arm (seedling planting mechanism)
13: Seedling stand 13a: Seedling placement part 13d: Seedling take-out port 21: Seedling vertical feeding device 28: Seedling holding rod 28b: Bending part 30: Seedling stay 50: Lower support part 51: Right side wall part (side wall part, Lower side wall)
51a: Groove 51b: Side wall through hole 52: Left side wall portion (side wall portion, lower side wall portion)
52a: Groove 52b: Side wall through hole 53: Rear wall portion 53a: Rear wall through hole 53b: Rib 54: Lower wall portion 55: Rear side wall portion 55a: Rear through hole 56: Holding portion B: Mounting bolt

Claims (8)

A seedling stand where seedlings are placed on the seedling placement section and reciprocated in the lateral direction of the aircraft,
A seedling vertical feed device that vertically feeds the seedlings placed on the seedling stand toward the seedling take-out port, and
The seedling planting mechanism for planting seedlings from the seedling outlet to the field,
A seedling stay that is placed facing the seedling loading surface of the seedling placing portion and suppresses the floating of the seedlings placed on the seedling placing portion,
A resin lower support portion for supporting the lower end portion of the seedling stay on the seedling stand is provided .
The lower support portion
A pair of side wall portions having a groove into which the lower end portion of the seedling stay is inserted,
A rear wall portion connecting the pair of the side wall portions is provided.
The rear wall portion is a seedling planting device provided with a rear wall through hole extending in a direction orthogonal to the lateral direction of the machine body . A seedling stand where seedlings are placed on the seedling placement section and reciprocated in the lateral direction of the aircraft,
A seedling vertical feed device that vertically feeds the seedlings placed on the seedling stand toward the seedling take-out port, and
The seedling planting mechanism for planting seedlings from the seedling outlet to the field,
A seedling stay that is placed facing the seedling loading surface of the seedling placing portion and suppresses the floating of the seedlings placed on the seedling placing portion,
A resin lower support portion for supporting the lower end portion of the seedling stay on the seedling stand is provided.
The lower support portion
A lower wall portion having a mounting through hole into which a mounting bolt is inserted and abutting on the seedling stand, and a lower wall portion.
A pair of lower side wall portions provided on both sides of the lower wall portion in the lateral direction of the machine body, and
Equipped with
A seedling planting device having at least one of the pair of lower side wall portions extending laterally to the machine body and having side wall through holes through which the mounting bolts can pass. A seedling stand where seedlings are placed on the seedling placement section and reciprocated in the lateral direction of the aircraft,
A seedling vertical feed device that vertically feeds the seedlings placed on the seedling stand toward the seedling take-out port, and
The seedling planting mechanism for planting seedlings from the seedling outlet to the field,
A seedling stay that is placed facing the seedling loading surface of the seedling placing portion and suppresses the floating of the seedlings placed on the seedling placing portion,
A resin lower support portion for supporting the lower end portion of the seedling stay on the seedling stand is provided.
It is equipped with a seedling holding rod that extends laterally to the machine body, is supported by the lower support portion, and holds the lower end portion of the seedlings placed on the seedling placing portion.
The lower support portion comprises a rear side wall portion provided with a rear through hole into which the seedling holding rod is inserted.
A seedling planting device provided with a bent portion that abuts on the rear side wall portion at the end portion of the seedling holding rod. The lower support portion
A pair of side wall portions having a groove into which the lower end portion of the seedling stay is inserted,
A rear wall portion connecting the pair of the side wall portions is provided.
The seedling planting device according to claim 2 or 3 , wherein the rear wall portion includes a rear wall through hole extending in a direction orthogonal to the lateral direction of the machine body. The seedling planting apparatus according to claim 1 or 4 , wherein the rear wall portion includes a rib extending from one side wall portion to the other side wall portion. The seedling planting apparatus according to claim 3 , wherein the lower support portion has a holding portion that abuts on the bent portion that is in contact with the rear side wall portion and holds the bent portion. The seedling planting apparatus according to claim 3 or 6, wherein the lower support portion is configured so that the distance between the seedling holding rod and the seedling mounting surface can be changed. A transplanting machine provided with the seedling planting apparatus according to any one of claims 1 to 7 .

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