JPH081618Y2 - Rice seeder vertical feeder - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a seedling vertical feeding device for vertically feeding pine-like seedlings placed on a seedling placing table of a rice transplanter, and constitutes this seedling longitudinal feeding device. By providing a flat portion on the sliding shaft that guides the driven roller in a freely rotatable manner, and by guiding this flat portion through the long hole provided in the bracket, it is possible to simultaneously prevent the sliding shaft from rotating and preventing it from coming off. The vertical seedling feeder of the rice transplanter.

[Prior art]

The rice seedling table of the rice transplanter is equipped with a vertical feed mechanism that vertically feeds the pine seedlings at the end of the lateral movement of the seedling table. This vertical feed mechanism has a structure in which a conveyor belt is wound between a driving roller and a driven roller, and the conveyor belt is intermittently driven at the end of the lateral movement of the seedling table to vertically feed the mat-shaped seedlings on the conveyor belt. However, this driven roller is rotatably positioned on a sliding shaft that is fixed to the back surface of the seedling mounting table and is not rotated by a bracket, and this sliding shaft is located in the long hole of the bracket. It is provided slidably and is biased by a spring so as to apply a predetermined tension to the conveyor belt. For example, Japanese Utility Model Laid-Open No. 62-202124 has been proposed as a rotation stopping structure for a driven shaft which is slidably guided by the bracket.

[Problems to be solved by the invention]

By the way, the one disclosed in the above publication is shown in FIG.
As shown in FIG. 3 (C), a detent member having an L-shaped cross section is fixed to the driven shaft, and the bent portion of the detent member is superposed on the end surface of the bracket to thereby prevent the driven shaft from moving. It has a structure that not only prevents rotation, but also prevents disengagement with a split pin and a flat washer fitted in the driven shaft.However, in addition to requiring many parts such as a rotation stop member, split pin, and flat washer, the split pin Since it is necessary to insert such as after inserting the rotation preventing member, there is a problem that the assembly is very troublesome.

Therefore, the present invention has been made in view of the above-mentioned conventional circumstances to solve the problem, and the flat portion provided on the sliding shaft that supports the driven roller is guided to the long hole provided in the bracket. Then, the present invention is carried out for the purpose of providing a vertical seedling feeder for a rice transplanter capable of simultaneously preventing the sliding shaft from rotating and coming off.

[Means for solving problems]

The present invention to achieve the above object, in a rice transplanter comprising a seedling longitudinal feeding device for longitudinally feeding a mat-shaped seedling at the reciprocating lateral movement end of the seedling placing table, which is composed of an endless belt wound around a driving roller and a driven roller, A flat portion having a thickness smaller than the diameter of the shaft is slidably guided on a guide hole provided in a bracket fixed to the rear surface of the seedling table and slidably supporting the driven roller. The bracket guide hole is formed as a different diameter hole in which an insertion hole into which the outer diameter of the sliding shaft is fitted and a long hole for slidably guiding the flat portion are connected, and the flat portion of the sliding shaft is provided with the bracket. It is guided by the long hole of.

[Action]

Therefore, the seedling vertical feeding device 15, in the rice transplanter composed of the endless belt 17 wound around the driving roller 14 and the driven roller 16, in the guide hole provided in the bracket 19 fixed to the back surface of the seedling mounting table 10. Even for the sliding shaft 21 which is slidably guided and supports the driven roller 16 so as to freely rotate, the sliding shaft 21
Is provided with a flat portion 46 having a thickness W thinner than the diameter d of the shaft 21, and the flat portion 46 is slidable between the guide hole of the bracket 19 and the insertion hole 47 into which the outer diameter of the sliding shaft 21 is fitted. Long hole to guide
By configuring a different diameter hole 50 that is continuous with 49, the sliding shaft
The outer diameter of 21 is inserted into the bracket 19 using the insertion hole 47, and then the flat portion 46 is inserted into the long hole 49.
It is possible to simultaneously perform 21 rotation prevention and removal prevention.

〔Example〕

Hereinafter, the drawings showing the present invention as an embodiment will be described.

As shown in FIG. 4, the passenger rice transplanter N includes a traveling machine body K having front wheels 1 and rear wheels 2, and a parallel link mechanism 5 including an upper link 3 and a lower link 4 provided behind the traveling machine body K. The planting part P is connected to the rear end. A bonnet 6 for accommodating an engine is provided at the front part of the traveling machine body K, and a steering wheel 7 provided at the rear of the bonnet 6 is operably linked to the front wheel 1. A driver's seat 9 is provided at the rear.

The parallel link mechanism 5 is driven by a hydraulic expansion / contraction mechanism (not shown) including a hydraulic cylinder and a piston so as to be able to move up and down. Both the front wheels 1 and the rear wheels 2 are passed through a transmission driven by an engine. It is configured to be driven by four wheels.

The planting part P is provided with a drive case 11 driven from the traveling machine body K via a joint shaft passing through the transmission, and below the drive case 11, a plurality of floats sliding on the rice field. 12 are provided, and a plurality of mat-shaped seedlings (not shown) are provided above the drive case 11.
The seedling placing table 10 on which is placed is arranged in a front high and low manner, and the seedling placing table 10 is capable of reciprocating lateral movement in the left-right direction. A planting rod 13 is provided so as to be vertically rotatable along a predetermined planting locus.

Below the seedling placing table 10, a seedling vertical feeding device 15 for longitudinally feeding each mat-shaped seedling placed on the seedling placing table 10 in the feeding direction is provided. , A vertical feed mechanism T, a line stopper mechanism J, and an interlocking mechanism R, and the details are as follows.

First, the vertical feed mechanism T will be described. Seedling stand 10 above
A conveyor belt 17 with a protrusion is wound between the lower drive roller 14 and the upper driven roller 16 below the drive roller 14, and the drive roller 14 is fixed to the back surface of the bottom plate of the seedling stand 10. While being integrally fixed to a drive shaft 20 rotatably laterally mounted on the bracket 19 by a fixing means such as screwing, one driven roller 16 is idled on a driven shaft 21 which is not rotated by the bracket 19. It is positioned so that it can roll freely.

As shown in FIGS. 5A to 5C, the sliding shaft 21 is provided with flat portions 46 on both sides of which a circular outer diameter 21a remains, and the flat portions 4
The thickness W of 6 is smaller than the diameter d of the sliding shaft 21. Further, as shown in FIG. 6, one bracket 19 has a large diameter insertion hole 47 into which the outer diameter of the sliding shaft 21 is fitted and a small diameter long hole 49 through which the flat portion 46 is slidably guided. Continuous different diameter holes 50
Is provided. Although FIG. 5 shows an example in which the flat portion 46 formed by crushing is provided on one side of the sliding shaft 21, the flat portion 46 may be provided on both sides of the sliding shaft 21. In this case, The flat portions 46 may be provided at the shaft end portions of the sliding shaft 21, and the diameter d of the sliding shaft 21 may be left between the flat portions 46 provided at both shaft ends. Alternatively, the flat portion 46 may be formed by machining cutting.

Therefore, by simply inserting the outer diameter of the sliding shaft 21 into the bracket 19 using the insertion hole 47 and then inserting the flat portion 46 into the long hole 49, the sliding shaft 21 can be prevented from rotating. It is possible to prevent slipping off at the same time.

As shown in detail in FIG. 2, a ratchet wheel 22 is integrally fixed to the drive shaft 20, and a drive lever 23 is described later.
Although it is a return spring for 24, the base end of a connecting pin 24a for pivotally supporting two engaging claws 25 for engaging with teeth provided on the outer periphery of the ratchet wheel 22 is fixed to the drive shaft 20. The drive lever 24 is rotatably positioned.

The vertical feed mechanism T described above is driven via the interlocking mechanism R, and the interlocking mechanism R is configured as follows. That is, a single horizontal shaft 26 pivotally supported on the seedling mounting table 10 side is provided on the rear side of the seedling mounting table 10 behind the drive shaft 20 in the seedling feeding direction, and each is fixed to the horizontal shaft 26. A vertical feed operation lever 27 and an interlocking lever 29 are provided on the left and right sides with the conveyance belt 17 sandwiched therebetween.

The drive lever 24 has an interlocking pin 31 protruding leftward and rightward.
The middle part of is fixed. One side 31a of this interlocking pin 31
The mounting hole provided on the lower side of the connecting plate 32 is rotatably fitted in and is positioned by the split pin.The long hole 33 provided along the longitudinal direction of the connecting plate 32 is
Inserted into the connecting pin 29 fixed to the interlocking lever 29,
Positioned by cotter pins. When the drive lever 24 is returned to the lower limit position D, the connecting pin 29a of the interlocking lever 29 is held in contact with the left side of the elongated hole 33.

The actuating lever 27 is returned to the lower limit position D by the return spring 23, but a roller 35 is rotatably provided at the other end of a rotating arm 34 whose one end is fixed to a transmission shaft (not shown). The moving arm 34 is constantly rotating in the direction of the arrow by the transmission shaft, and when the seedling table 10 moves to the end of the horizontal movement, the rotating arm 34 moves the vertical feed operating lever 27 from the lower limit position D to the upper limit position U. By doing so, the drive lever 24 is driven through the interlocking lever 29 and the connecting plate 32 so as to rotate clockwise by a predetermined angle.

When the drive lever 24 is rotated, the ratchet wheel 22 is rotated by a predetermined angle by the engaging claw 25, so that the drive shaft 20 and the drive roller 14 integrated with the ratchet wheel 22 are rotated, and the conveyor belt 17 with a protrusion is rotated by an arrow. Driven in the direction, the pine seedlings on the seedling mounting table 10 are vertically fed until they come into contact with a seedling receiver (not shown).

Next, the row stopper mechanism J that moves the vertical feed mechanism T to the seedling feed stop position will be described.

A stop arm 36, which comes into contact with the interlocking pin 31 of the drive lever 24 from the upper side, is rotatably provided on the drive shaft 20, and one end of which is pivotally connected to a mounting hole provided at one end of the stop arm 36. The other end of the wire 37 is connected to the seedling stand 10
Is pivotally connected to a line stop lever 40 provided on the upper back surface of the device, and this line stop lever 40 is centered on the fulcrum shaft 40a, and the vertical feed device G shown by a solid line and the seedling feed stop position S shown by a chain line.
The Bowden wire 41 has one end pivotally connected to the ratchet lever 40, and the other end is pivotally connected to a planting clutch (not shown). When the seedling feeding stop position S is operated, the planting clutch is in the off position, and when the longitudinal feeding position G is operated, the planting clutch is in the on position.

Further, the driven shaft 21 that supports the driven roller 16 is supported in a long hole provided in the bracket 19 in a state in which the rotation is restricted, and is also reinforced by being fixed to the back surface of the seedling mounting table 10 via a spring 43. It is stretched from the member 44, and a predetermined tension is applied to the conveyor belt 17 with protrusions. In FIG. 3, reference numeral 45 is a bracket which rotatably supports the horizontal shaft 26 and to which one of the outer wires of the Bowden wire 37 is fixed.

With the above configuration, when the bar stop lever 40 is moved to the vertical feed position G, the Bowden wire 37 is loosened,
Since the drive arm 24 is returned to the lower limit position D by the return spring 23, the stop arm 36 pressed by contacting the other 31b of the interlocking pin 31 is also returned to the lower limit position D.

At the lower limit position D, the rotation arm 34 driven in the arrow direction constitutes the interlocking mechanism R.
By moving to the upper limit position U position,
The drive lever 24 constituting the vertical feeding mechanism T is rotated by a predetermined angle via 29 and the connecting plate 32 to vertically feed the pine seedlings. Since the stop arm 36 is located below the swing start position of the drive lever 24, that is, at the front position in the rotation direction of the drive lever 24 and is directly connected without passing through the interlocking mechanism R, the drive lever as the vertical feed mechanism T is provided. Even if 24 is swung, the stop arm 36 as the stapling mechanism J does not swing together with the drive lever 24. For this reason,
Since the Bowden wire 37 does not expand and contract in conjunction with the swing of the drive lever 24 during the seedling planting work, the load of the conventional vertical feed mechanism increases correspondingly, and the deterioration of the bone Den wire also occurs. It can solve the drawback of being extremely unreliable.

However, when the row stopper lever 40 is operated to the seedling feeding stop position S, the Bowden wire 37 is pulled and the stop arm 36 as the row stopper mechanism J swings. Therefore, the stop arm 36 moves the link pin on the side of the interlocking lever 24. Contact part 31b,
The interlocking lever 24 moves to the seedling feeding stop position S integrally with the stop arm 36. In conjunction with this, the drive lever 24 and the connecting plate 32 as the interlocking mechanism R move to the upper side (left side in the drawing). As a result, the long hole 33 of the interlocking plate 32 moves upward (left side in the figure), and the rotating arm 34 moves the vertical feed operation lever 27.
Even if is moved to the upper limit position U, since the drive lever 24 does not swing only by the connecting pin 29a reciprocating in the elongated hole 33, the drive lever 24 is held at the seedling feed stop position S, and the vertical feed mechanism T. Are kept in a state where feeding of seedlings is stopped.

Therefore, when the vertical feeding mechanism T is set to the seedling feeding stop position S by operating the row stopper lever 40, the vertical direction of the pine-shaped seedlings at any position among the plurality of pine-shaped seedlings placed on the seedling mounting table 10 is set. Since the feeding can be stopped, it is possible to smoothly plant ridges and the like where a fraction of the number of planting lines occurs, as in the conventional case.

[Effect of device]

INDUSTRIAL APPLICABILITY As described above, the present invention is a rice transplanter in which a seedling longitudinal feeding device is composed of an endless belt wound around a driving lock and a driven roller, and a guide hole provided in a bracket fixed to the back surface of the seedling mounting table. Even in the case of a sliding shaft which is slidably guided to and which supports the driven roller freely, the sliding shaft is provided with a flat portion having a thickness smaller than the diameter of the shaft and the bracket. By configuring the guide hole as a different diameter hole in which the insertion hole into which the outer diameter of the sliding shaft fits and the long hole that slidably guides the flat portion are continuous, the outer diameter of the sliding shaft can be By simply inserting the flat portion into the long hole by inserting it into the bracket by utilizing it, the sliding shaft can be prevented from rotating and coming off at the same time.

Therefore, unlike conventional rice transplanters, the number of parts can be reduced without fixing a detent member having an L-shaped cross section to the driven shaft or inserting a split pin and a plain washer into the driven shaft. The assembly can be performed very easily.

[Brief description of drawings]

The drawings show one embodiment of the present invention, FIG. 1A is a side view showing the interlocking state of the vertical feed mechanism and the row stopper mechanism, and FIG. 1B is the interlocking relationship diagram of the drive lever and the interlocking lever, The drawing is a plan view of the main part as seen from the direction of arrow A in FIG. 1A, and FIG. 3 is the view B in FIG. 1A.
A plan view in the direction of the arrow, FIG. 4 is an overall side view of the riding rice transplanter, FIG. 5A is an enlarged plan view of the sliding shaft, FIG. 5B is an enlarged front view of the sliding shaft, and FIG. FIG. 6 is an enlarged side view of the drive shaft, and FIG. 6 is an enlarged side view of the essential parts of the bracket. 10 ... Seedling stand, 14 ... Drive roller, 16 ... Followed roller, 17 ... Conveyor belt (endless belt), 19 ... Bracket, 20 ... Drive shaft, 21
... Sliding shaft, 21a ... Circular outer diameter, 22 ... Ratchet wheel, 23 ... Return spring, 24 ... Drive lever, 25 ... Engaging claw, 27 ... Vertical feed operating lever, 29 ... Interlocking lever, 31 ... Interlocking pin, 32 ...
Connection plate, 33 ... elongated hole, 36 ... stop arm, 37 ... Bowden wire, 40 ... bar stop lever, 46 ... flat part, 47 ... insertion hole, 49 ... elongated hole, 50 ... different diameter hole.

Claims (1)

[Scope of utility model registration request] 1. A rice transplanter comprising a seedling longitudinal feeding device for longitudinally feeding pine seedlings longitudinally at the end of a reciprocating lateral movement of the seedling placing table, which comprises an endless belt wound around a driving roller and a driven roller. A flat portion having a thickness smaller than the diameter of the shaft is provided on a sliding shaft which is slidably guided in a guide hole provided in a bracket fixed to the back surface and supports the driven roller in a freely rotatable manner. The guide hole is formed as a different diameter hole in which the insertion hole into which the outer diameter of the sliding shaft fits and the long hole that slidably guides the flat portion are connected, and the flat portion of the sliding shaft becomes the long hole of the bracket. A rice seedling vertical feeder that guides you.