JP3208420B2 - Rice transplanter seedling platform - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seedling mount for a rice transplanter, and more particularly, to a seedling mount main body comprising a plurality of vertical ribs and a bottom plate having a seedling mounting surface disposed on the bottom side of these vertical ribs. And a vertical feeder comprising a driving roller, a driven roller, and a transport band.

[0002]

2. Description of the Related Art Conventionally, this seedling mounting table is disclosed in
As described in Japanese Patent Application Laid-Open No. 9-156212, a seedling mounting base body including a plurality of vertical ribs and a bottom plate having a seedling mounting surface disposed on the bottom side of these vertical ribs, a driving roller, and a driven roller And a longitudinal feeder comprising a conveying band, and a rear surface of the longitudinal rib at a portion where the longitudinal feeder is provided, made of angle steel, a through hole at a lower portion, and a long hole with a notch at an upper portion. The formed mounting frames are provided, and the driving shaft of the driving roller is inserted and supported in the through holes of these mounting frames,
The driven shaft of the driven roller is supported by the elongated hole.

In addition, a planting claw and a vertical feeder are provided for each of a plurality of mat seedling conveying surfaces formed between the vertical ribs, and a drive shaft of each vertical feeder is provided with an input to the drive shaft. When the drive from the mechanism is turned on and off, a unit clutch is interposed to stop the drive of the planting claw on an arbitrary conveying surface to perform the streaking. There is also known one in which the vertical feeding of a vertical feeding device on an arbitrary transport surface is stopped.

[0004]

However, as described above, when the drive of the vertical feeder of the conveying surface to be stuck is controlled using the unit clutch as described above, the mounting frame for supporting the drive shaft and the driven shaft is required. Separately, a support for supporting the unit clutch is used, and the support is provided on the vertical rib together with the mounting frame, and the support of the drive shaft and the driven shaft and the support of the unit clutch are individually performed by the mounting frame and the support. The mounting dimensions between the mounting frame provided on the vertical ribs and the support, the dimensions between the drive shaft supported by the mounting frame and the unit clutch supported by the support, etc. There has been a problem that an error occurs in the mounting dimensions between the components, the mounting accuracy is likely to deteriorate, and the number of components increases.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a bearing for supporting a drive shaft of a drive roller and a driven roller of a driven roller of a vertical feeder with a single bearing stand, and for holding a bearing of the drive shaft of the bearing stand. Can be used as a mounting portion of a cylindrical rotating body in a unit clutch and a mechanism for inputting power to a drive shaft, whereby not only the mounting dimensions between the drive shaft and the support shaft but also the bearings of the drive shaft, the unit clutch, and the cylinder An object of the present invention is to provide a seedling mounting table of a rice transplanter capable of improving the mounting accuracy by reducing the error of each mounting dimension between the rotators and reducing the number of parts.

[0006]

In order to achieve the above object, the present invention comprises a plurality of vertical ribs 31 and a bottom plate 32 having a seedling mounting surface 32a disposed on the bottom side of the vertical ribs 31. Seedling table main body 3, drive roller 40, driven roller 44
A bearing for supporting the drive shaft 41 of the drive roller 40 on one side, on the back side of the longitudinal rib 31 at the position where the longitudinal feed device 4 is provided; A component mounting portion 62 capable of holding a unit clutch is provided, and a driven shaft 45 of the driven roller 44 is provided on the other side.
The bearing base 6 having the bearing 65 for supporting the bearing is mounted.

[0007]

According to the above construction, the driving roller 4 of the vertical feeding device 4 is provided.
The drive shaft 41 and the driven shaft 45 of the driven roller 44 can be supported by one bearing stand 6, and the component mounting portion 62 for holding the bearing of the drive shaft of the bearing stand 6 includes a unit clutch and a drive shaft. 41, which can be commonly used as a mounting portion of a cylindrical rotary body in a mechanism for inputting power to the drive shaft 41, whereby not only the mounting dimensions between the drive shaft 41 and the driven shaft 44, but also the bearings and unit clutches of the drive shaft 41 and the cylindrical rotary body The mounting can be performed with high accuracy by mounting a small error in each mounting dimension between them, and the number of parts can be reduced.

[0008]

FIG. 14 shows a riding type six-row planting type rice transplanter.
1 and a bonnet 1 around the engine 11.
2 and a driver's seat 13
a, a steering unit 13 provided with a steering handle 13a, etc., while supporting a pair of left and right front wheels 14 on both sides of a front part of the body 1, and being driven by the engine 11 on both sides of a rear part of the body 1. The left and right rear wheels 15 are supported. The seedling plant 2 is supported at the rear part of the body 1 via a parallel link mechanism 16 having a top link 16a and a pair of left and right lower links 16b so as to be vertically movable. 2 is a planting case 21 to which rotational power is transmitted from the engine 11;
A plurality of transmission cases 22 supported so as to be able to transmit power in the machine body width direction, a plurality of planting claws 23 rotatably supported by the transmission case 22, and receiving and supporting the entire load of the planting device 2. A plurality of floats 24 are provided, and a seedling mounting table is reciprocally moved in the machine body width direction.

As shown in FIGS. 2 and 3, the seedling mounting table includes a plurality of vertical ribs 31 and a seedling mounting surface 32a disposed on the bottom side between the vertical ribs 31. A bottom plate 3 provided with an opening 32b at an intermediate portion in the length direction of the mounting surface 32a.
2 and a longitudinal feeder 4 comprising a driving roller 40, a driven roller 44 and a transport band 46 as apparent from FIGS. As shown in FIG. 14, the upper guide rail 3 extends in the body width direction and connects the vertical ribs 31 to the upper side.
5 and a seedling stand rail 34 is provided at a lower part along a guide rail 35 described later and connects the vertical ribs 31. The seedling stand 34 is provided in the upper guide rail 33. The rolling element 37 provided on the support rod 36 extending upward from the case 21 is inserted, and the seedling stand rail 34 is inserted.
Is slidably supported on a guide rail 35 fixed to a bracket 38 extending from the transmission case 22 so that the entire seedling mounting table can reciprocate in the width direction with respect to the body 1 via the rails 33 and 34. And

The guide rail 35 has a plurality of seedling outlets 39a disposed below the seedling table main body 3.
While the vertical feeding device 4 is arranged between the vertical ribs 31 on the back side of the opening 32b in each bottom plate 32 of the seedling mounting base body 3 and When the seedling mounting table main body 3 is positioned at both end positions in the machine body width direction by reciprocating motion by the feeding device 4, the mat seedling on the bottom plate 32 is vertically fed to the planting claw 23 side by a predetermined pitch. I have.

In this way, the body 1 is moved forward with the driving of the engine 2 and at the same time,
Is reciprocated in the left-right direction via the guide rail 35, the seedling stand rail 34, and the upper guide rail 33, while rotating each of the planting claws 23.
Then, the seedlings of mat seedlings placed on the bottom plate 32 are sequentially taken out and planted in a field.

The upper guide rail 33 and the nursery stand rail 34, which connect the vertical ribs 31 and also serve as a horizontal frame, to the rear side of the nursery stand main body 3 in the nursery stand constructed as described above. In the upper and lower portions of the opening 32b, horizontal frames 5, 51 connecting the vertical ribs 31 and horizontal frames 52 connecting the upper ends of the vertical ribs 31 are provided. Bearings and unit clutches that connect the horizontal frames 5 and 51 located at the upper and lower portions of the vertical feed device 4 to the back side of the vertical ribs 31 and support the drive shaft 41 of the drive roller 40 on one side. Has a component mounting portion 62 capable of holding
The bearing 65 for supporting the driven shaft 45 of the driven roller 44 is attached to the other side.

Of the horizontal frames 5, 51, 52, the horizontal frames 5, 51 provided at positions above and below the opening 32b in the bottom plate 32 have a hat-shaped cross section as shown in FIGS. The horizontal ribs 5 are connected to each other by the horizontal frames 5 and 51, and the horizontal frame 5 provided at a position below the opening 32a in the bottom plate 32 is a horizontal frame 5 having a hat-shaped cross section. Further, a mounting frame portion 50 of the seedling stand rail 34 is integrally formed on the lower side of the, and the seedling rail 34 is attached to the vertical rib 31 via the mounting frame portion 50. The horizontal frame 52 provided at the upper end of the vertical rib 31 uses a plate having an L-shaped cross section to reinforce the upper end of the seedling mounting base body 3. Bottom plate 32
An auxiliary guide plate 52a extending upward from the support is detachably supported.

As shown in FIGS. 3 to 6, the bearing base 6 has a bolt mounting hole 61 at the lower end of the horizontal frame 5 located below the opening 32b, and holds a bearing and a unit clutch. It has a component mounting portion 62 made possible and has a hook portion 63 having a spring hooking hole 63a at the upper end, a bolt mounting hole 64 for the horizontal frame 5 located above the opening 32b, and the driven shaft 45. A bearing portion 65 formed of a long hole extending in the vertical direction is formed, and the respective portions are integrally formed by aluminum die casting.

The component mounting portion 62 has a semicircular receiving portion 62a for receiving a bearing and a unit clutch of the driving shaft 41 of the driving roller 40, and from both longitudinal ends of the receiving portion 62a to both sides in the width direction. A pair of mounting pieces 62b, 62c extending in parallel and having mounting screw holes a, b, and c at three positions, that is, both ends and a central part, for mounting a bearing and a unit clutch. The mounting piece 62b,
The mounting screw holes a, b and c of 62c can share the mounting of a bearing and a unit clutch, and are provided with a plurality of mounting screw holes a, b and c. By selecting the screw holes a, b, and c, a plurality of bearings and unit clutches can be attached together, or the bearings and the unitary clutch and the cylindrical rotating body in the power input mechanism to the drive shaft can be attached together. is there. Further, a through hole 66 is provided between the component mounting portion 62 and the bearing portion 65 for bolting a mounting rod 53 of the loosening prevention plate 54 described later.

Then, as shown in FIGS. 4 and 5, the bearing bases 6 are fixed to the horizontal frames 5, 51 located at the upper and lower positions of the opening 32b through the bolt mounting holes 61, 64. It is connected and fixed by the bolts 5a and 51a. Thereby, at the portion of the seedling mounting base body 3 where the vertical feeding device 4 is provided, the bearing base 6 and the vertical rib 31 form a vertical bone, and are located above and below the opening 32b, that is, the vertical The horizontal frames 5, 51 located at the upper and lower portions of the feeder 4 form a framework of a strength-resistant structure that becomes a horizontal bone. This makes it possible to reinforce the periphery of the opening 32b formed in the bottom plate 32 so that the transport band 46 of the vertical feeding device 4 projects outward from the bottom plate 32, and to increase the strength of the seedling mounting table main body 3. You can.

On the other hand, the driving roller 40 of the vertical feeding device 4
As shown in FIG. 2, a pair of drive gears 40c having drive teeth 40b and a pair of drive rollers 40c connected to both sides of the drive gears 40a and having an annular regulating groove 40d on the outer periphery.
The drive gear portion 40a and the drive roller portion 40c are inserted and fixed to the outer periphery of the drive shaft 41.

As shown in FIG. 1, the driven roller 44 includes a connecting roller portion 44a having a small diameter and a connecting roller portion 4a.
4a, and is connected to both sides of an annular regulating groove 44c on the outer periphery.
And a pair of driven roller portions 44b having the following configuration. The connecting roller portion 44a and the driven roller portion 44b
5 is rotatably supported on the outer periphery.

Further, as shown in FIG. 1, the transport belt 46 is hung between the rollers 40 and 44 and projects outward from the bottom plate 32 of the seedling table main body 3 on the surface. A large number of protrusions 46a are provided, and tooth portions 46b meshing with driving teeth 40b of a driving gear portion 40a of the driving roller 40 in the widthwise middle portion of the back surface, and the driving roller portions at both outer positions of the tooth portions 46b. A large number of engaging projections 46c, 46 that are inserted into and engaged with the regulating groove 40d of the conveying belt 40c and the regulating groove 44c of the driven roller portion 44b to restrict the lateral displacement of the transport band 46.
c is provided over the entire circumference.

In this manner, the engagement between the teeth 46b provided on the back surface of the transport belt 46 and the drive teeth 40b of the drive gear portion 40a of the drive roller 40 causes the transport belt 46 and the drive roller 40 to engage.
And the engagement protrusions 46c, 46c of the transport band 46 are inserted and engaged with the annular regulating grooves 40d, 44c of the drive roller portion 40c and the driven roller portion 44b. Since the lateral displacement with respect to the rollers 4 and 44 can be prevented, accurate vertical feed can be performed.

In the embodiment shown in the figure, by attaching the bottom plate 32 to the vertical ribs 31, six transport surfaces for transporting mat seedlings between the vertical ribs 31 are formed as a whole of the seedling mounting base body 3, The vertical feeding device 4 is provided for each of these transport surfaces.
On the other hand, the seedling table main body 3 is divided into three blocks A, B, and C by using a pair of adjacent transport surfaces as one block, and a pair of longitudinal feeds located in each of the blocks A, B, and C are provided. The vertical feed device 4 can be driven or stopped independently for each device 4.

That is, the driving shaft 41 of the driving roller 40
Is composed of a square cylinder shaft 42 and a transmission shaft 43 rotatably housed in the square cylinder shaft 42, and the square cylinder shaft 42 corresponds to each of the blocks A, B, C, and has one side angle. Cylinder shaft 4
2a, i.e., a one-sided square shaft 42a, a central square-shaped shaft 42b, and a second-sided square shaft 42c provided on the left side of FIG. A pair of drive rollers 40 are inserted and fixed to the respective square cylinder shafts 42a, 42b, 42c, while the respective square cylinder shafts 42a, 42
As shown in FIG. 9, the center transmission shaft 43a and the outer transmission shaft 43b are opposed to the center square tube shaft 42b and the other side tube shaft 42c of the center square shaft 42b and the outer square shaft 42b, respectively. The transmission shafts 43a and 43b are
c, and a pair of unit clutches 70, 70a are connected between the free end of the central transmission shaft 43a, the one-sided square shaft 42a and the centered square shaft 42b, and the outer transmission shaft 43b A unit clutch 70b is interposed between the free end of the block and the other-side rectangular cylinder shaft 42c, and a pair of vertical members located in each of the blocks A, B, and C by the unit clutches 70, 70a, 70b. The vertical feeder 4 can be driven or stopped independently for each feeder 4.

More specifically, the one-sided square cylinder shaft 42a has one end portion and an intermediate portion formed with the vertical ribs 3 of the block A.
The bearing 47 is attached to the component mounting portion 62 of the bearing base 6 mounted on the bearing base 1.
, And a unit clutch 70 described later is interposed at the other end. This one-sided square tube shaft 42a
As shown in FIG. 7, the bearing 4 has a pair of mounting legs 47a and supports the divided rectangular cylindrical shaft.
7 is inserted into and supported by the semicircular receiving portion 62a of the bearing base 6, and the mounting leg 47a is attached to the mounting piece 62 of the component mounting portion 62.
The mounting bolts 48 are screwed and held in mounting screw holes b, b in the center of the b, 62c.

The central square cylinder shaft 42b has a unit clutch 70a at one end thereof, an intermediate portion rotatably held by a component mounting portion 62 of the bearing base 6 via a bearing 47, and the other end. The portion ends before the bearing stand 6 and is supported only by the central transmission shaft 43a. When the intermediate portion of the central square cylinder shaft 42b is supported by the bearing 47, as shown in FIG. 10, a cylindrical rotary body 83 of an input mechanism described later is mounted by using the component mounting portion 62. 47 is screwed to each of the mounting screw holes c, c at the ends of the mounting pieces 62b, 62c of the component mounting portion 62 with mounting bolts 48.

Further, the other-side rectangular cylinder shaft 42c has a component mounting portion 62 of the bearing base 6 at the intermediate portion thereof as in the case shown in FIG.
Of the mounting pieces 62b, 62c are rotatably held by mounting screw holes b, b at the center through a bearing 47. One end of the mounting piece 62b, 62c ends before the bearing base 6, and the outer transmission shaft 4
3b, and a unit clutch 70b is interposed at the other end.

As shown in FIG. 9, a connecting shaft 43c for connecting the central transmission shaft 43a and the outer transmission shaft 43b has a central large-diameter portion 43d and small-diameter portions 43e provided on both sides of the large-diameter portion 43d. And connects the center transmission shaft 43a and the outer transmission shaft 43b to the small-diameter portions 43e on both sides,
The connecting shaft 43c is disposed between the bearing bases 6 between the blocks B and C, and each of the small diameter portions 43e is opposed to the central square tube shaft 42b and the other side square tube shaft 42c. The shaft 43a and the outer transmission shaft 43b are connected via a sleeve-shaped connection joint 43f. The small-diameter portions 43e are supported by using two bearings 49 in which a pair of mounting legs 49b are displaced to one side and mounted on the bearing 49a for supporting the small-diameter portion 43e. These bearings 49, 49 are attached to the mounting pieces 62 of the bearing base 6.
b, 62c, mounting screw holes a, a and c at both ends,
The connection shaft 43c is rotatably supported on the component mounting portion 62 via both bearings 49, 49 by being screwed to the mounting member 48 with a mounting bolt 48a.

Also, a free end of the central transmission shaft 43a,
The unit clutches 70, 70a interposed between the one-sided square cylinder shaft 42a and the central square cylinder shaft 42b are configured as shown in FIG. 8, and the central transmission shaft 43a is connected to the blocks A, B The free end of the center transmission shaft 43a is exposed between the one-sided square shaft 42a and the central square shaft 42b. The clutch plate 71 having a pair of teeth on both sides in the axial direction is inserted and fixed, and the bearing 72 supported by the semicircular receiving portion 62a of the bearing base 6 and having a pair of mounting legs 72a is mounted on the bearing 72. Attachment pieces 62b, 62 of component attachment portion 62
The mounting bolts 48 are inserted into the mounting screw holes b, b at the center in FIG.
c, and the clutch plate 71
Is rotatably supported together with the central transmission shaft 43a, while the one-sided square shaft 4
A cylindrical shifter 73 having teeth engaging with the teeth of the clutch plate 71 is slidably supported at each free end of the central square cylinder shaft 42b and the center square cylinder shaft 42b. At 74, the shift fork 7 is operated to move the shifter 73 to the mounting screw holes a and c at both ends of the mounting piece 62b.
5 is provided so as to be swingable via a mounting shaft 75a, and the shifter 73 is slid by the swinging operation of each shift fork 75, so that the clutches 70 and 70a are turned on and off. . As shown in FIG. 1, the unit clutch 70b provided between the free end portion of the outer transmission shaft 43b and the other-side rectangular cylinder shaft 42c also includes only one unit clutch in the one shown in FIG. Are arranged, and are mechanically the same.

In the embodiment shown in the figure, the unit clutches 70, 70a, 70b for controlling the longitudinal feeder described above are used.
And the planting claws 23 provided corresponding to the number of the respective conveying surfaces.
Are provided corresponding to the respective blocks,
Three planting pawl control unit clutches (not shown) for controlling the planting power of the planting pawls 23 for each block are provided, and these planting pawl control unit clutches and the longitudinal feed are provided. Control unit clutches 70, 70a,
Each shift fork 75 of 70b is connected to three operation levers 76, 76a, 76b provided at the upper part on the rear side of the seedling table main body 3 via operation cables, respectively, and by operating these levers 76, 76a 76b, Block A,
The longitudinal feed device control unit clutch is controlled simultaneously with the planting claw control unit clutch in B and C so that the vertical feed is stopped simultaneously with the stop by the planting stop for each of the blocks A, B and C. Make up.

The drive shaft 41, that is, the transmission shaft 43
The mechanism for inputting power to the motor is configured as shown in FIGS. 9 to 11, and a bearing 4 is provided between the blocks B and C.
On the outer periphery of the large-diameter portion 43d of the connecting shaft 43c supported via the components 9, 49, a cylindrical rotating body 80 having a one-way clutch 81 is provided as shown in FIG. As shown in FIG. 10, the central square cylinder shaft 42b
In the bearing base 6 located at the middle part in the length direction, a cylindrical rotary body rotatable relative to the central square cylindrical shaft 42b is provided in the mounting screw holes a, a of the mounting pieces 62b, 62c of the component mounting part 62. 83, and a bearing 84 having a pair of mounting legs 84a is screwed and mounted with mounting bolts 48c,
Each of the rotating bodies 80 and 83 is provided with swing arms 85 and 86 projecting radially outward of the rotating bodies 80 and 83,
The swing arms 85 and 86 are connected by a connecting member 87 extending in the machine body width direction as shown in FIG.
The cam body 88 is attached to the middle portion of the cam. As shown in FIG. 5, a rotating shaft 89 that constantly rotates during seedling planting is projected from both sides of the planting case 21 by a transmission mechanism inside the planting case 21, and the cam body is attached to both ends of the rotating shaft 89. Actuating arms 91, 91 having a rotor 90 abutting on 88 are provided. Thus, the seedling table main body 3
Is moved to one end position in the machine body width direction and the cam body 88 faces one of the operating arms 91 and 91 which is always rotating, and the rotor 90 of the operating arm 91 causes the cam body 88 to rotate. By pushing, the connecting member 87
The swing arm 91 is swung through the one-way clutch 81, and the connection shaft 43c, the center transmission shaft 43a, and the outer transmission shaft 43b are rotated by a predetermined angle through the one-way clutch 81,
With the rotation of the central transmission shaft 43a and the outer transmission shaft 43b, the one-side square cylinder shaft 42a, the center square cylinder shaft 42b, and the other-side square cylinder shaft 42c are rotated via the unit clutches 70, 70a, 70b, and The transport belt 46 is moved by a predetermined pitch in the seedling feeding direction.

In FIG. 9, reference numeral 92 denotes the cam body 88.
When the contact between the cam body 8 and the rotor 90 is released,
8 is a return spring for returning to the original position.

As described above, one bearing base 6 not only bears the drive shaft 41 of the drive roller 40 of the longitudinal feed device 4 and the driven shaft 45 of the driven roller 44, but also holds the bearing of the drive shaft 41. Mounting piece 6 in the component mounting portion 62
The mounting screw holes a, b, and c of the mounting members 2b and 62c can be shared as a mounting portion of the bearing 72 of the unit clutch and a mounting portion of the bearing 84 of the cylindrical rotating body 83 in the mechanism for inputting power to the drive shaft 41. , A plurality of mounting screw holes a, b, c
By selecting these mounting screw holes a, b, and c, a plurality of bearings and unit clutches can be mounted together, or a cylindrical shape in a mechanism for inputting power to bearings, unit clutches, and drive shafts. The rotating body can be attached together. Therefore, the mounting dimensions between the drive shaft 41 and the driven shaft 44, as well as the mounting dimensions between the bearing, the unit clutch and the cylindrical rotating body of the drive shaft 41 can be reduced and the mounting can be performed accurately. In addition, the number of parts can be reduced.

The driven shaft 45 of the driven roller 44
Is composed of a single common shaft that rotatably supports the driven roller 44 of each of the vertical feeders 4, and supports the driven shaft 45 on the bearing portion 65 of each of the bearing pedestals 6 so that it can only move up and down. The spring hook 63 of the driven shaft 45 and the bearing base 6
, A tension spring 68 is interposed therebetween, and the driven shaft 45 is always pulled upward by the spring 68 so as to maintain the tension state of the transport band 46.

In the embodiment shown in the drawings, as shown in FIGS. 4 and 12, the driven shaft 45 is supported on the bearing base 6 so as to be movable only in the vertical direction.
9 and a split pin P which penetrates through the retaining plate 69 and the driven shaft 45 and secures the driven shaft 45 from rotation and axially simultaneously. That is, the H
The shape of the retaining plate 69 is such that the width of the intermediate portion 69a is smaller than the width of the elongated hole forming the bearing portion 65 of the bearing base 6, and the length of the intermediate portion 69a is smaller than the thickness of the bearing base 6. It is formed by forming a pair of engaging portions 69b longer on both sides of the intermediate portion 69a and longer than the width of the long hole. For example, as shown in FIG. Of the bearing pedestals 6 located, one of the bearing pedestals 6 is inserted into the bearing portion 65 of the bearing pedestal 6, and the engaging portions 69b, 69b are engaged with the outer surface of the bearing portion 65. When the intermediate portion 69a of the retaining plate 69 abuts against the inner wall of the bearing portion 65 to prevent the driven shaft 45 from rotating so as to prevent wear of the support portion of the tension spring 68. At the same time, the engaging portions 69b, 69b engage with the outer surface of the bearing 65. It is doing the retainer in the axial direction of the driven shaft 45 by.

With this configuration, one retaining plate 6
9 and the split pin P can be used both for stopping the driven shaft 45 and for preventing the driven shaft 45 from being pulled out in the axial direction, so that the number of parts can be reduced and the number of assembling steps can be reduced. The function of preventing axial removal can be reliably performed.

The bearing base 6 is provided with the retaining plate 69 and the split pins P. The bearing base 6 located on the outermost side of the seedling mounting base opposite to the bearing base 6 has a bearing portion. Of course, the driven shaft 45 may be protruded outward from 65, and the protrusion end of the driven shaft 45 may be provided with a separate stopper means by a washer and a pin.

Also, in FIGS. 1, 2 and 5, 54
Is a slack preventing plate for holding the transport band 46 for transporting the mat seedling from the back side thereof to prevent the transport band 46 from loosening inward.
A support plate 55 is fixed to a middle portion in the longitudinal direction of the support plate 55, and a mounting rod 53 having a flange 53 a together with the bearing base 6 is fixed to the support plate 55 through a through hole 66 provided in each bearing base 6. The slack preventing plate 54 is attached to the mounting rod 53 so as to be held at two positions on the left and right at the intermediate position in the longitudinal direction of the rear surface of each transport band 46. With this configuration, each of the transport belts 46 is provided with two slack preventing plates 54, 54 at the left and right middle positions in the longitudinal direction of the back surface.
, So that the slack can be reliably prevented while having a small slack preventing area. The mounting rod 53
Are connected to the bearing bases 6, that is, the vertical ribs 31, so that the mounting rod 53 can be used also as a horizontal frame of the seedling mounting base body 3, and the flange 5 of the mounting rod 53 can be used.
Reference numeral 3a also serves as a support for supporting a support 77 of an operation cable for operating the shift fork 75 of the unit clutches 70, 70a, 70b.

As shown in FIG. 13, the bottom plate 32 is provided with a large number of bulging portions 32c.
A plurality of ridges 32d are provided on c, so that the mat seedling can be moved smoothly.

3 and 4, reference numeral 93 denotes a main seedling presser for pressing the seedlings placed on the bottom 32 against the bottom plate 32. The main seedling presser 93 is provided on the bottom plate 32 from below. And a plurality of substantially L-shaped rods extending upwardly of the vertical feeding device 4 at a predetermined interval from the bottom plate 32 conveyed by the vertical feeding device 4 with the main seedling presser 93. The upper set seedling is elastically pressed from the side to prevent the set seedling from floating or causing lateral displacement. Reference numeral 94 denotes a sub-seedling presser that extends from near the lower end of the main seedling presser 93 to the place where the planting claws 23 take out the seedlings at a predetermined distance from the bottom plate 32. In the lower part of the bottom plate 32, the seedling holding effect by the planting claw 23 near the seedling take-out location can be reliably and satisfactorily exhibited, and the planting can be reliably carried out by the planting claw 23. I try to increase the accuracy. Further, reference numeral 95 denotes a seedling stopper having a plurality of stopper claws 95a for preventing the mat seedlings from moving toward the transporting band 46 side when the seedlings are stopped. Pivot 9
7 is freely swingable. Also, 98
When the number of mat seedlings on the bottom plate 32 becomes less than a certain amount,
This is a remaining amount detection sensor that detects this, and when the detection sensor 97 detects, a warning is issued by a lamp, a buzzer, or the like to notify the worker.

[0039]

As described above, according to the present invention, according to the present invention, the seedling table main body 3 is composed of the plurality of vertical ribs 31 and the bottom plate 32 having the seedling mounting surface 32a disposed on the bottom side of the vertical ribs 31.
And a vertical feeding device 4 including a driving roller 40, a driven roller 44, and a transport band 46. The driving roller 40 is provided on one side of the vertical rib 31 at a position where the vertical feeding device 4 is provided. Since the bearing base 6 having the component mounting portion 62 capable of holding the bearing and the unit clutch that supports the drive shaft 41 of the above and the bearing portion 65 that supports the driven shaft 45 of the driven roller 44 is mounted on the other side, While the drive shaft 41 of the drive roller 40 of the longitudinal feed device 4 and the driven shaft 45 of the driven roller 44 can be supported by one bearing stand 6, the component mounting portion 6 of the bearing stand 6 that supports the bearing of the drive shaft is provided.
2 can be commonly used as a mounting portion of a cylindrical rotating body in a unit clutch and a mechanism for inputting power to a driving shaft, whereby the mounting dimensions between the driving shaft 41 and the driven shaft 44, as well as the bearing of the driving shaft 41 and It is possible to mount the unit clutch and the cylindrical rotary body with small errors in the mounting dimensions and to mount the unit with high accuracy and to reduce the number of parts.

[Brief description of the drawings]

FIG. 1 is an enlarged rear view of a main part of a seedling mounting table according to the present invention.

FIG. 2 is a partially omitted rear view of the entire seedling mounting table.

FIG. 3 is a partially omitted front view of the entire seedling mounting table.

FIG. 4 is a longitudinal sectional side view of a vertical rib portion in a main part of the seedling mounting table.

FIG. 5 is a vertical sectional side view of a bottom plate portion in a main part of the seedling mounting table.

FIG. 6 is a rear view of the bearing base.

FIG. 7 is a partially cutaway rear view showing a structure for holding a drive shaft to a bearing base.

FIG. 8 is a partially cutaway rear view showing a structure for holding the unit clutch to the bearing base.

FIG. 9 is a partially cutaway rear view showing a state in which a cylindrical rotating body having a one-way clutch, a bearing, and a transmission shaft are attached to a bearing base.

FIG. 10 is a partially cutaway rear view showing a state where the cylindrical rotating body is mounted on a bearing base of a bearing and a rectangular cylindrical shaft.

FIG. 11 is an explanatory diagram showing an input mechanism of the vertical feed device.

FIG. 12 is an explanatory view showing a structure for attaching a driven shaft to a bearing base.

FIG. 13 is a partially omitted sectional view showing a shape of a seedling mounting surface on a bottom plate.

FIG. 14 is a side view showing the entire structure of the rice transplanter.

Claims (1)

(57) [Claims] 1. A plurality of vertical ribs 31 and these vertical ribs 31
Seedling table main body 3 including a bottom plate 32 having a seedling mounting surface 32a disposed on the bottom side of the base, a driving roller 40 and a driven roller 4
A bearing for supporting the drive shaft 41 of the drive roller 40 on one side on the back side of the longitudinal rib 31 at the position where the longitudinal feed device 4 is provided. And a component mounting portion 62 capable of holding a unit clutch, and a driven shaft 4 of the driven roller 44 on the other side.
A seedling table for a rice transplanter, wherein a bearing table 6 having a bearing portion 65 for supporting the bearing 5 is mounted.