JPS6010349Y2 - Seedling vertical feeding device in rice transplanter - Google Patents

Description

[Detailed description of the invention] This invention is a rice transplanter that plants seedlings in a flooded field. It is related to the device.

In this type of seedling vertical feeding device, the seedling vertical feeding means that engages with the seedling mat on the seedling platform and vertically feeds the seedling mat during intermittent driving has a large length at the engaging portion with respect to the seedling mat. As the speed increases, the effect of vertically feeding the seedlings during intermittent driving and the braking effect of preventing the seedling mat from slipping off and collapsing when not driven become greater.

In view of the above-mentioned facts, this invention aims to provide a novel seedling vertical feeding device for a rice transplanter, which is equipped with a seedling vertical feeding means that can lengthen the length of engagement with the seedling mat without any inconvenience. .

Regarding the illustrated embodiment, the structure of the vertical seedling feeding device according to the invention will be explained. In FIG. A seedling stand 3 is a planting arm supported by the planting case 1.

A seedling platform 2, which is supported by left and right control handles 4 extending rearward and upward from the machine body so as to be able to reciprocate laterally, is provided so as to extend left and right from the planting case 1 and is movable laterally. By connecting the transverse feed shaft 5 and the seedling table 2 with a pair of left and right transverse feed arms 6, horizontal reciprocation is possible.

As usual, the planting arm 3 is moved up and down by the planting case 1, and is used to cut out individual seedlings from the seedling mat on the horizontally moving seedling platform 2 and plant them in the field. ing.

As for the seedling mat on the seedling platform 2, it is also customary to vertically feed it intermittently at each end of the horizontal movement of the seedling platform 2 in the left and right direction. A vertical feed rod 7, which is associated with the horizontal reciprocating drive mechanism of the seedling platform 2 and is intermittently driven forward and backward at each lateral movement end of the seedling platform 2, moves the seedling platform 2 from the side of the planting case 1. It is installed diagonally towards the lower surface of the lower end.

As shown in Fig. 2-4, the lower part of the seedling platform 2 in the inclined direction is approximately parallel to the vertical direction of the seedling platform 2, that is, in the direction of vertically feeding the seedlings in which the seedling mat on the seedling platform 2 is vertically fed. A suitable number of vertically elongated slit-like windows 8 are formed intermittently in the lateral direction of the seedling platform 2 along the seedling platform 2.

The seedling vertical feeding means, which engages with the seedling mat on the seedling platform 2 and intermittently vertically feeds the seedling mat, is particularly designed to move the teeth of the seedling platform 2 through the window hole 8 from the bottom side of the seedling platform 2. 2. An appropriate number of racks 9 protrude from the top surface.

In the case shown in the figure, each rack 9 is formed with teeth attached to both sides of its upper surface, and the teeth 9a on the lower half face upwardly on the slope of the seedling stand 2, and the teeth 9b on the upper half face upwardly. The seedling table 2 has a shape in which the seedlings are placed in a downward direction.

The rack 9 described above is supported as follows.

That is, as shown in Fig. 1.3.4, the upper end of each rack 9 is provided with a curved portion 9c that is curved away from the lower surface of the seedling stand 2, and is partitioned by vertical ribs 2a on both sides. A plurality of racks 9 belonging to each of the struggling sections are arranged on the bottom side of the seedling platform 2 by providing a connecting rod 10 that connects the curved portions 90 along the lateral direction of the seedling platform 2. They are connected to each other at the top end.

In addition, a bracket 11 that is appropriately inclined is placed on the lower surface of the seedling table 2 at a midway position in the vertical direction of the seedling table 2.
It is fixedly installed at the bottom side position and connects the connecting rod 1 mentioned above.
The upper end side of the rack 9 is supported by inserting and supporting both ends of the rack 9 into elongated holes 12 formed in the brackets 11 on both sides and the bearing plate 11a on the brackets 11.

On the other hand, on the lower surface of the lower end of each rack 9, there is provided a hanging part 9d that is oriented almost perpendicular to the surface of the seedling platform 2. By providing a connecting rod 13 that connects the hanging parts 9d along the lateral direction of the seedling stand 2, they are connected to each other at the lower end side of the rank 9.

Further, on the lower surface of the lower end of the seedling platform 2, a bracket 14 that is oriented substantially perpendicular to the surface of the seedling platform 2 is fixedly installed at a position on the lower surface side of the vertical rib 2a, as clearly shown in FIG. A hexagonal vertical feed shaft 16 is provided along the lateral direction of the seedling stand 2, and is rotatably supported by a bearing 15 attached to the bracket 14.

Then, a pair of left and right U-shaped swinging arms 17 made of sheet metal are installed at the left and right end rack 9 positions on the bottom side of each struggling section, so that the swinging arms 17 integrally move as the vertical feed shaft 16 rotates. A long hole 18 is formed in the swing arm 17, and the connecting rod 1 is inserted into the long hole 18.
3, the lower end side of the rack 9 is supported.

As shown in Fig. 1.3.4, brackets 19 are fixed and vertically installed halfway down the lower surface of both racks 9 belonging to each struggling section, and brackets 19 are installed on the lower surface of the seedling stand 2 at the upper end of the rack 9. A pair of left and right tension springs 20, both ends of which are attached to the brackets 11 and 19, are provided on the bottom side of each struggling section, and the racks 9 are biased to move the rack 9 substantially upward in the direction of the slope of the seedling stand 2. It is.

Further, on the vertical feed shaft 16, a driven cam 21 shown in FIG. 1.4-6 is mounted at the center of the shaft 16.
It is provided so that it cannot rotate relative to the other.

As understood from FIG. 3, the tension spring 20 described above biases the vertical feed shaft 16 to rotate in the direction of arrow A in FIG. 3 via the connecting rod 13 and the swing arm 17. The driven cam 21 comes into contact with the end surface of the bracket 14 as shown by the chain line in FIG. 6 in the state shown in FIG. A stopper portion 21b is integrally provided to maintain the posture of the swing arm 18 as shown in FIG. 3.

In the state shown in FIG. 3, the posture of the swinging arm 17 is maintained as described above, and the force of the spring 20 is acting on the rack 9 almost in the upward direction of the slope of the seedling stand 2.
As shown, the upper and lower connecting rods 10.13 connecting the rack 9 are in contact with the upper end surfaces of the elongated holes 12.18.

Therefore, as shown in FIG. 3, the rack 9 is held at a position where it protrudes above the seedling table 2 and engages with the seedling mat, and this position is set as the standby position of the rack 9.

In order to drive the rack 9 from the planting case 1 side, the first
As shown in the figure, a vertical feed drive shaft 22 is rotatably supported by the control handle 4 along the width direction of the seedling platform 2, and the end of a rotating arm 22a fixed to the vertical feed drive shaft 22 is The 7 ends of the feed rod are connected.

As shown in FIGS. 1 and 6, the vertical feed drive shaft 2
A pair of left and right drive cams 23 are fixed to the drive cam 2 and protrude toward the roller 21a at the end of the driven cam 21.

Each drive cam 23 is configured such that a driven cam 21 that reciprocates laterally together with the seedling platform 2 causes each driving cam 23 to
It is positioned so that it faces 3.

The drive cam 23 is driven by the rotational displacement of the vertical feed drive shaft 22 caused by the advance of the vertical feed rod 7 when the vertical feed rod 7 is moved forward and backward at each horizontal movement end of the seedling table 2 as described above. When the cam 23 is rotated from the posture shown by the chain line in FIG. 6 to the posture shown by the solid line, the driven cam 21
is pressed to rotate the cam 21 from the posture shown in chain lines to the posture shown in solid lines in FIG. It is configured to allow you to return to your normal posture.

At each lateral movement end of the seedling platform 2, the rack 9 is driven from the planting case 1 side so that the driven cam 21 is rotated from the posture shown by the chain line in FIG. 6 to the posture shown by the solid line as described above,
This rotational displacement of the vertical feed shaft 16 in the direction of arrow B causes the swing arm 17 to swing in the same direction, thereby vertically feeding the seedlings, and then, by the action of the tension spring 20, returning to the original position. What is returned is configured.

In order to guide and restrict the movement of the rack 9 that is displaced in this manner, a restriction plate 24 as described below is provided.

That is, this regulation plate 24 is formed by bending the tongue-shaped cutout formed in the bracket 14 in the direction of the struggling section as shown in FIG. 5, as shown in FIG. It is formed into an arc shape centered on a line,
These are provided at both ends of each connecting rod 13.

The regulating plate 24 is arranged in a manner that will be explained below along with the operation of the illustrated vertical seedling feeding device.

The swinging arm 17 is rotated by 60 degrees in the direction of arrow B from the posture shown by the solid line in FIG. The position 17(n) shown by the chain line in FIG. 1A is reached, and at this time the lower end of the rack 9 is displaced in the downward direction along the direction in which the seedling table 2 is inclined.

The above-mentioned regulation plate 24 has an end supported in the elongated hole 18 of the swing arm 17 when the swing arm 17 is caused to swing slightly in the direction of arrow B from the position shown by the solid line in FIG. 8a. The end of the connecting rod 13 rides on the upper surface of the regulating plate 24 as shown in FIG. 9, and the position of the connecting rod 13 within the elongated hole 18 is maintained at the upper end position within the elongated hole 18. 17 is performed, and when the swing arm 17 finally swings to position 17 (II) shown by the chain line in FIG. , is provided.

That is, since the above-mentioned tension spring 20 is provided and the rack 9 and the connecting rod 13 are biased to move in the upward direction of the slope of the seedling platform 2, when the swing arm 17 swings in the direction of arrow B, the From the moment the arm 17 assumes a position perpendicular to the seedling stand 9, as shown by the chain line position 17(I) in FIG. , the connecting rod 13 is kept in the elongated hole 18 while the swinging arm 17 is swung from the posture shown by the solid line to the posture 17(n) shown by the chain line in FIG. The rack 9 is held in position at the upper end, and thereby the seedling stand 2 is displaced downward from the position shown by the solid line in FIG. The lower end is
The teeth are designed to protrude above the seedling placement surface level L of the seedling placement stand 2.

When the lower end of rank 9 is displaced as described above,
The upper end of the rack 9 is formed into an elongated hole by sliding the upper end connecting rod 10 inside the elongated hole 12 of the bracket 11 and the bearing plate 11a from the upper end position to the lower end position shown in FIG. A displacement guided by 12 is performed.

As shown in FIG. 3, the long hole 12 described above is arranged along a straight line S that is inclined at an angle of about 30 degrees with respect to the two surfaces of the seedling stand.
When the swinging arm 17 swings in the direction of mark B, the upper end of the rack 9 is displaced in the downward direction of the inclination of the seedling stand 2 while gradually moving its teeth toward the lower surface of the seedling stand 2.

The swinging arm 17 is in the posture 17 (■) shown by the chain line in FIG. 8a.
After the vertical feed rod 7 changes its movement to backward movement, the tension spring 2
0 will work as follows.

That is, the swinging arm posture 17 (shown by the chain line in FIG. 8a)
In II), since the connecting rod 13 comes off the top of the regulating plate 24, the rack 9 is moved almost upward in the direction of the slope of the seedling table 2. The lower end of the rack 9 is slightly moved upward by the force of the tension spring 20. While being displaced, the connecting rod 13 falls into the elongated hole 18 to the lower end of the elongated hole 18, and first the eighth
The state shown in the figure is obtained.

Since the lower end of the rack 9 is displaced while the connecting rod 13 is guided by the elongated hole 18 in this way,
Depending on the amount of fall of the connecting rod 13 into the elongated hole 18, the lower end of the rack 9 is in a state where its teeth are almost recessed from the seedling mounting surface level L of the seedling mounting stand 2, as shown in FIG. I ended up taking it.

From the state shown in FIG. 8, the rack 9 is pulled up in the upward direction of the inclination of the seedling stand 2 by the force of the tension spring 20 while the swinging arm 17 swings in the direction of arrow A, and at this time the connecting rod The upward movement of the connecting rod 13 within the elongated hole 18 is prevented by the connecting rod 13 coming into contact with the lower surface of the regulating plate 24 .

Therefore, the lower end of the rank 9 is displaced upward in the slope of the seedling platform 2 with its teeth substantially recessed from the seedling mounting surface level L, and is swayed as the lower end of the rack 9 is displaced. The movable arm 17 is swung from the posture shown in FIG. 8 to the posture shown in FIG. 8C, and in the state shown in FIG.

When the connecting rod 13 comes off the lower surface of the regulating plate 24 in this way, the biasing force of the tension spring 20 causes the connecting rod 13 at the lower end of the rank 9 to move upward within the elongated hole 18 while displacing the lower end of the rack 9. Since the lower end of the rank 9 is displaced while the connecting rod 13 is guided by the elongated hole 18, the lower end of the rank 9 is slightly tilted upward in the direction of the slope of the seedling stand 2. While being displaced, the tooth portion is moved so as to protrude from the seedling placement surface level L,
The state shown by the chain line in FIG. 8C, that is, the original state shown by the solid line in FIG. The stopper part 21b of the driven cam 21 is caused by the swinging of the swinging arm 17.
This state is fixed by coming into contact with the end surface of the bracket 14 as shown by the chain line in FIG.

When the lower end of rank 9 is displaced as described above,
The upper end of the rack 9 is connected to the elongated hole by the connecting rod 10 on the upper end side rising up inside the elongated hole 12 of the bracket 11 and the bearing plate 11a from the lower end position in the elongated hole 12 to the upper end position. A displacement guided by 12 is performed.

Since the elongated hole 12 is along the straight line S (FIG. 3) as described above, when the rack 9 is displaced by the tension spring 20, the upper end of the rack 9 gradually becomes toothed toward the upper surface of the seedling stand 2. While moving the seedling table 2, the seedling table 2 is displaced in an upward direction.

As described above, the rack 9 is driven from the planting case 1 side from the state shown by the solid line to the state 9 (■) shown by the chain line in FIG. As a result, a vertical feeding process for vertically feeding the seedling mat on the seedling table 2 is carried out, but the rack 9 shown by the chain line in FIG. 8a is used.
As described above, up to the lower end position 9 (■) of the rack 9
The teeth at the lower end of the rack 9 protrude beyond the seedling mounting surface level L of the seedling stand 2 to maintain engagement with the seedling mat, and the teeth at the upper end of the rack 9 are recessed from the level L as described above. However, until the middle of the above vertical feeding process, the level is L.
The rack 9 is located at a more protruding position and engages with the seedling mat, and as a whole, the engagement of the rack 9 with the seedling mat is maintained, and the required vertical feeding of the seedling mat is carried out.

Also, in Figure 8a, from rack position 9 (■) shown by the chain line to rack position 8
The movement of the rack 9 up to the rack 9 position shown by the chain line in FIG.

In this returning process, first, the connecting rod 13 on the lower end side of the rack 9 falls from the position 13 (II) shown by the chain line in FIG. 8a to the position shown in FIG. The teeth at the upper end of the rack 9 are recessed almost to the level L of the seedling placement surface, and the engagement with the seedling mat is first released.
2. By being located at the lower end, the seedling mat is immersed and disengaged from the seedling mat.

From this state, the rack 9 is moved as shown in FIG.
, the seedling platform 2 is tilted back upward to the position shown by the solid line, but at this time, the teeth at the lower end of the rack 9 are maintained in a recessed state to approximately the seedling loading level L as described above. However, the teeth on the upper end side of the rack 9 gradually protrude and engage with the seedling mat, but as a whole, it does not seem to be able to overcome the weight of the seedling mat. No engagement force is generated, and as a result, the seedling mat is not pushed up in the upward direction of the seedling platform 2 on the rack 9.
Return in the upward direction of the slope is obtained.

Finally, as the connecting rod 13 moves upward from the position shown by the solid line to the position shown by the chain line in FIG. The state is restored.

As is clear from the above explanation of the vertical feeding process and returning process of the rack 9, the displacement of each cycle of the rack 9 is
The lower end of the rack 9 is displaced in a closed curve as shown in FIG. 9, and the upper end of the rack 9 is reciprocated along the straight line S in FIG. 3. If there is a large difference in route between the outbound and return trips,
The displacement follows a hysteresis curve, so to speak.
As is clear from the above description of the rack displacement locus in each cycle, the teeth of the rack 9 protrude from the surface of the seedling platform 2 during the outward journey, causing the rack 9 to move against the seedling mat.
On the return trip, the teeth of the rack 9 are almost retracted from the surface of the seedling stand 2, and the above-mentioned engagement is almost released.

While the displacement locus of each cycle of the rack 9 is set as described above, during the return trip described above, the displacement locus of the rack 9
The posture of the swinging arm 17 and the connecting rod 13 shown in Fig. 8 are such that not only the teeth on the lower end side but also the teeth on the upper end side are in the fully recessed state.
The following mechanism is further provided for selectively displacing the rack 9 so as to obtain a position, and for fixing the rack 9 position in such a fully recessed gear position.

That is, as shown in FIGS. 1 and 6, an inner wire 25 is attached to the end of the stopper portion 21b of the driven cam 21.
Connect the operating cable 26 at its tip to the inner wire 2
5, the driven cam 21 can be rotated from the posture shown by the chain line in FIG. It is provided so that it can be swung to (II).

As shown in FIG.
The hydraulic cylinder 28 is connected to the end of the piston rod 28a of the hydraulic cylinder 28, which is fixedly supported by the hydraulic cylinder 7 and installed obliquely.
8 is designed so that the pulling action of the inner wire 25 is applied to the contraction operation of the inner wire 25.

Both ends of the outer wire 30 of the operating cable 26 are respectively attached to upper and lower outer stops that are attached to support pipes extending between the left and right steering handles 4.

In addition, in the illustrated case, as is clear from FIG.
The pin 32 fixed to the stopper part 21b is passed through the elongated hole 31a of the connecting fitting 31 to connect the tip of the inner wire 25 to the stopper part 21b.

Therefore, when the hydraulic cylinder 28 is selectively contracted by manipulating the pipe, the driven cam 21 is rotationally displaced from the posture shown by the chain line in FIG. 6 to the posture shown by the solid line due to the pulling action of the inner wire 25. Rotational displacement of the feed shaft 16 causes the swinging arm 17 to swing from the posture shown by the solid line in FIG. 8a to the posture 17(n) shown by the chain line.

Then, when the swing arm 17 is displaced to the above-mentioned posture 17(n), the connecting rod 13 comes off the upper surface of the regulating plate 24 as described above, so that the lower end of the rack 9 is moved by the action of the spring 20 as shown in FIG. The connecting rod 13 slides down within the elongated hole 18 of the swing arm 17, and as shown in FIG. The rack 9 reaches the lower end position of the elongated hole 18, and in that state, the retracting movement of the rack 9 is stopped.

As long as the hydraulic cylinder 28 is maintained in the contracted state and the inner wire 25 is kept in tension, the swing arm 17 will
Since the posture shown in FIG. 8 is maintained against the force of the spring 20, the state shown in FIG. 8 is maintained.

In the state shown in FIG. 8, the rack 9
The connecting rod 10 on the upper end side is also located at the lower end position within the elongated hole 12, and the upper end of the rack 9 is also substantially submerged from the surface of the seedling stand 2.

Therefore, when the seedling mats on the seedling rack 2 are used up and become insufficient, and before transferring seedlings to transfer a spare seedling mat onto the seedling rack 2, the teeth of the rack 9 are operated as described above by operating the cylinder 28. If the seedling mat is almost submerged from the two sides of the seedling tray, the new seedling mat to be transferred will slide on the two sides of the seedling tray without getting caught on the teeth of the rack 9, and the seedlings will be transferred smoothly and smoothly. This will be done quickly.

When the hydraulic cylinder 28 is extended after this seedling transfer,
The swinging arm 17 can swing with the force of the spring 20,
The force of the spring 20 allows the rack 9 to return to its original position as described above.

The elongated hole 31a (FIG. 6) of the illustrated connecting fitting 31 is provided for escape when the driven cam 21 is driven by the driving cam 23, but it is designed to provide sufficient slack to the inner wire 25 when the cylinder 28 is extended. By doing so, the long hole 31 as described above can be omitted.

In addition, a lever can be used in place of the hydraulic cylinder 28, and such a lever can also be used as another lever operated during seedling transfer, such as a main clutch lever, a running latch lever, or a planting clutch lever. This is advantageous both in terms of structure simplification and ease of operation.

As is clear from the above explanation, the seedling vertical feeding device in the rice transplanter of this invention has a seedling vertical feeding means that engages with the seedling mat on the seedling platform and intermittently vertically feeds the seedling mat. The standby position of the rack 9 is set at a position where the rack protrudes above the seedling mounting surface and engages with the seedling mat, and the rack 9 The displacement locus of each cycle is set so that the teeth of the rack 9 are almost recessed from the seedling mounting surface when the seedling pine returns to the standby position after being vertically fed, and the rack 9 is moved to It is characterized by the provision of operating means 26 and 28 that can be selectively brought into the immersed position and locked in that position, and provides the following effects.

In other words, the seedling vertical feeding device of this invention has a structure in which the rack 9 is used as the seedling vertical feeding means, and the rack displacement locus is set so that the teeth are almost submerged from the seedling table surface when the rack returns to the standby position. Since pushing up of the seedling mat at the time of return is avoided, a rack with a long engagement length with respect to the seedling mat is used without any problem, and the effect of vertically feeding the seedling mat is greatly enhanced.

Further, the seedling vertical feeding device of this invention sets the return displacement locus of the rack 9 to the standby position as described above, and maintains the standby position when the rack 9 is not driven so that the rack 9 engages with the seedling rat. Since the rack 9 has a large engagement length with the seedling mat during the suspension period of vertical seedling feeding, the seedling mat is reliably prevented from slipping off due to its own weight on the inclined seedling platform surface. shall be.

The seedling vertical feeding device of this invention selectively brings the rack 9 to the above-mentioned tooth recessed position, rather than the standby position where it engages with the seedling mat as described above, and locks it. Since this is possible, prior to seedling transfer in which a new seedling mat is placed on the seedling tray, the rack 9 is displaced to the above-mentioned tooth recessed position in which the rack 9 does not engage with the seedling mat. To eliminate the resistance of a rack to new seedling mats to be spliced, to easily and quickly splice seedlings, and to improve work efficiency.

[Brief explanation of drawings]

Figure 1 is a side view of the main parts of a rice transplanter equipped with an embodiment of this invention, and Figure 2 is a partial plan view of only the main parts of the rice transplanter.
Figure 3 is a partially cutaway and partially cutaway side view of a portion of the rice transplanter, Figure 4 is a partial bottom view of only the main parts of the rice transplanter, and Figure 5 is a partial view of the main parts of the rice transplanter. Fig. 6 is a partially longitudinal side view of the main part of the same rice transplanter, Fig. 7 is a longitudinal side view of the main part of the same rice transplanter, and Fig. 8 a, b, and c are respectively the same implementation. FIG. 9 is a side view showing the movement of the main parts of the example, and a schematic diagram showing the action. 2...Seedling stand, death...window hole, 9...
...Rack, 9a, 9b...Teeth, 9c...
...Curved part, 9d... Drooping part, 10...
・Connecting rod, 11...Bracket, 12...
...Elongated hole, 13...Connecting rod, 14...
...Bracket, 15...Bearing, 16...
... Vertical feed axis, 17 ... Swing arm, 18
...Elongated hole, 19 ...Bracket, 20
...Tension spring, 21...Followed cam, 21b...Part of stopper, 22...
...Vertical feed drive shaft, 23... Drive cam, 24.
...Regulation plate, 25 ... Inner wire, 2
6...Operating rope, 28...Hydraulic cylinder, 28a...Zeston rod, 31...
・Connection fitting, 31a... Long hole, 32...
Zen.

Claims (1)

[Scope of utility model registration request] The seedling vertical feeding means, which engages with the seedling mat on the seedling platform and intermittently vertically feeds the seedling mats, is configured as a rack provided along the vertical feeding direction of the seedlings, and the standby position of this rack is The rack is set at a position where it protrudes above the seedling table surface and engages with the seedling mat, and the displacement locus of each cycle of the rack is determined by the teeth of the rack when returning to the standby position after vertically feeding the seedling mat. The rice transplanter is configured such that the rack is almost recessed from the seedling mounting table surface, and further provided with an operating means that selectively brings the rack into the above-mentioned tooth retracted position and locks it in this position. Seedling vertical feeding device in the machine.