JPS6222564B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mechanism for adjusting the amount of seedling scraping in a rice transplanter.

When raising pine seedlings, the amount of sowing (sowing density) is changed in consideration of the planting area, season, etc. Therefore, at the time of planting, it is necessary to adjust the amount of scraping by the planting claws depending on the amount of seeds sown.

Conventionally, when adjusting the amount of scraping, the seedling receiver, which holds the leading edge of the pine seedlings at the lower end of the seedling platform, was loosened, and its position was adjusted back and forth with respect to the machine. You can adjust the position (scraping length) of the pine seedlings relative to the planting claw facing the scraping opening provided on the body, and also replace the sprocket wheel that drives the transverse feed mechanism of the seedling platform to remove the pine seedlings. The amount of horizontal feed (scraping width) was adjusted to adjust the appropriate number of plants to be planted.

Therefore, preliminary work is required to adjust the number of plants to be planted according to the amount of sowing, and it takes a lot of time to adjust each part, especially for inexperienced people. It was also a hassle.

Under these circumstances, with conventional methods for adjusting the amount of scraping, it takes a lot of time to adjust, making it virtually difficult to immediately change the number of plants to be planted on the spot. In many cases, planting was continued even if the amount of scraping changed slightly rather than the number. In addition, when adjusting the scraping amount, only the scraping length or scraping width was adjusted unilaterally, so if a large adjustment was required, only the length or width could be adjusted. There were drawbacks such as the number of seedlings increasing or decreasing, the blocks of seedlings being scraped not being in the proper shape, crumbling and falling apart, and the number of seedlings being inaccurate.

In order to solve this problem, the seedling receiver provided at the front end of the seedling tray and the transmission of the screw shaft provided in front of this seedling receiver are interlocked and connected by a connecting rod. A device has already been proposed in which both the width and front-to-back length of a pine seedling can be adjusted to a large or small size at a constant ratio by simultaneously switching the gear position of the transmission device in relation to the upper and lower positions. There is.

However, when a pine seedling slides down on a steeply sloped seedling platform and its leading edge collides with the seedling receiver, or when it is sent forward and its leading edge collides with the seedling receiver, the bedding soil of the pine seedling is The degree of vertical compression is not constant, even if the seeding density is the same, depending on factors such as the hardness and softness of the bed soil, the strength of root entanglement, and the moisture level of the bed soil. With conventional devices that only uniformly adjust the width and longitudinal length of pine seedlings, it is not possible to adjust only the seedling receiver back and forth in accordance with the degree of vertical compression of the pine seedlings, and it is still difficult to do so. The disadvantage that the number of seedlings planted per plant fluctuates and is not stable remains unresolved. In addition, with this conventional device, the seedling receiver cannot be adjusted up or down unless the operator moves near the seedling receiver, which makes it very cumbersome and inefficient for the operator to move from the operating position each time. Another disadvantage is that footprints are left behind at the planting location in the field each time the plant is moved.

The present invention was obtained in order to eliminate the drawbacks of the conventional seedling scraping amount adjusting device described above, and it is possible to adjust the seedling scraping amount to the gear position per gear of the transmission device by one-touch operation of the operating lever. The object of the present invention is to provide a scraping amount adjustment mechanism in a rice transplanter that can efficiently stabilize the number of seedlings to be planted per plant by switching the front and rear positions of the receptor in multiple stages, A transmission device configured to be able to switch a screw shaft for lateral movement of a seedling platform to multiple speeds; a seedling receiver provided at the front end of the seedling platform and configured to be movable in parallel in the front-rear direction; is interlocked and connected to a single operating lever so that the front and rear positions of the seedling receiver can be switched in multiple stages with respect to the gear position per gear of the transmission device, and this operating lever is attached to the back of the seedling stand. It is characterized in that it is positioned and directed toward the control section, and is movably fixed at multiple locking positions provided on the guide.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, drawings showing the present invention as an embodiment will be described.

As shown in FIG. 1, an engine 1 is mounted on the front part of a frame 2, wheels 3 are provided in the center so that they can be raised and lowered and driven freely, a float 4 is supported by the frame 2 so that it can be moved up and down, and the wheels 3 are mounted on the front part of a frame 2. It slides on the rice field using the driving force of 3.

A drive case 5 extends behind the frame 2, and a handle 6 is connected to this. 7 is a seedling receiver, and 8 is a seedling stand, which are supported using the drive case 5 and handle 6. 9 is a horizontal feed adjustment case, 10 is a seedling scraping amount adjustment lever corresponding to the seeding amount, 11 is a machine control lever, 1
2 is an auxiliary seedling stand.

As shown in FIG. 2, a transverse feed adjustment case 9 is provided on the drive case 5, and a shaft 13 is passed through a hole in a bracket 9b provided on an extended arm 9a. A receptor 7 is provided and a spring 14 is compressed, thereby constantly urging the seedling receptor 7 outward.

As shown in FIGS. 3 and 4, the seedling receiver 7 is supported at three locations, and a guide 15 is provided in the middle, which is pulled by a rod 29 in the direction of arrow A (or in the opposite direction) to place the seedlings. The position with respect to the lower end of the stand 8 is adjusted.

Note that the arm 9a is provided with a protruding slide surface 9c, and is configured to support the lower surface of the seedling receiver 7 and move stably back and forth.

Next, the mechanism for adjusting the amount of seedling scraping of the present invention will be explained with reference to FIG.

20 is a screw shaft for horizontal feeding of the seedling stand 8, 21
is the drive shaft. The drive shaft 21 is provided with sprocket wheels 22, 22' having different numbers of teeth, and the screw shaft 20 is provided with sprocket wheels 23, 23', respectively. A shifter 24 is provided with a clutch pawl and has engaging clutch pawls on both sides of the sprocket wheels 23, 23'.
By engaging one of the engaging clutch pawls, the power of the drive shaft 21 is transmitted to the screw shaft 20 in stages to change the amount of lateral movement of the seedling platform 8.

The shifter 24 has a shift fork 25 on the shaft 26.
The shift fork 25 is supported so as to be swingable around the shift fork 25, and is driven by a switching lever 27.

One end of this switching lever 27 is connected to the scraping amount adjusting lever 10 by a wire 28. This switching lever 27 is provided with holes A, A, and C, and one end of the rod 29 is connected to one of these holes, and the other end of the rod 29 is connected to the guide 15 fixed to the lower surface of the seedling receiver 7. Thus, a switching lever 27 for changing the amount of lateral feed of the seedling platform 8 and the seedling receiver 7 are interlocked and connected.

Next, a method of operating the scraping amount adjusting mechanism will be explained.

As shown in FIG. 5, the scraping amount adjustment lever 10
can be moved within the groove of the guide 30 and fixed at each of the cut positions A, B, C, and D.
If you now operate the scraping amount adjustment lever 10 to position A,
The switching lever 27 is in the solid line A position, the right clutch pawl of the shifter 24 meshes with the clutch pawl provided on the sprocket wheel 23, and the power of the drive shaft 21 is transmitted to the screw shaft 20 through the sprocket wheels 22 and 23. be done. When the scraping amount adjustment lever 10 is operated to position B, the right clutch pawl of the shifter 24 remains engaged with the clutch pawl provided on the sprocket wheel 23, and the switching lever 2
7 moves to position B indicated by the chain line, and the power of the drive shaft 21 is transmitted to the screw shaft 20 through the sprocket wheels 22 and 23.

Furthermore, when the scraping amount adjustment lever 10 is operated to the C position or the D position, the clutch pawl provided on the left side of the shifter 24 remains engaged with the clutch pawl provided on the sprocket wheel 23', and the switching lever 27 moves to the chain line. Move to position C or position D,
The power of the drive shaft 21 is provided by the sprocket wheel 2.
It is transmitted to the screw shaft 20 through 2' and 23'. The number of teeth of these two sets of sprocket wheels is different, and in the embodiment, the right side is configured to be driven at low speed, and the left side is configured to be driven at medium speed. For example, the scraping amount adjustment lever 10 is set to position A or position B. When in position, the screw shaft 20 is driven at low speed,
The amount of lateral movement of the seedling platform 8 driven by this screw shaft 20 is made small. This condition is selected when planting seedlings with a large amount of seeding.

Next, to explain the back and forth movement of the seedling receptor 7,
Move the scraping amount adjustment lever 10 to positions A to D as described above.
When operated to the position, the switching lever 2
7 moves around the axis 26 from position A to position D. In conjunction with this, the switching lever 27 is
The seedling receiver 7 connected via 9 is in position A to D.
Move in the front and rear direction of the position.

Therefore, when the scraping amount adjustment lever 10 is in the A position and the B position, the shifter 24 is connected to the sprocket wheel 23 and the screw shaft 20 is driven at the same low speed, and the seedling stand 8 is moved at a speed corresponding to that speed. Move with ivy. However, the seedling receivers 7 move forward of the machine in multiple stages corresponding to their respective positions. In this state, the scraping width of the seedbed remains the same, but the length moves in multiple steps between the A position and the B position, and the scraping length changes by this moving distance.

Furthermore, when the scraping amount adjustment lever 10 is operated to the C position, the shifter 24 is connected to the sprocket wheel 23', so the lateral movement of the seedling platform 8 becomes medium speed, and the lateral movement amount is reduced accordingly. increase At the same time, the seedling receiver 7 moves from the B position to the C position, so that the amount of scraping increases in both width and length. When the scraping amount adjustment lever 10 is operated from the C position to the D position, the lateral movement width is the same as the C position and does not change, but the seedling receiver 7 moves from the C position to the D position and the scraping length is increased. only increases respectively.

Therefore, in the present invention, by operating the scraping amount adjustment lever 10, one of the transmission
The longitudinal position of the seedling receiver 7 can be adjusted in multiple stages with respect to the speed change position per stage. In addition, Rod 29,
By appropriately switching the connections to the holes A, A, and C provided in the switching lever 27, the position of the seedling receiver can be changed in multiple stages for the same horizontal feed width, allowing for various fine-grained scraping lengths. can be adjusted to obtain.

In short, the scraping amount adjustment mechanism in the rice transplanter according to the present invention includes a transmission device configured to be able to change the screw shaft for lateral movement of the seedling platform to multiple speeds, and a transmission device provided at the front end of the seedling platform. A seedling receiver configured to be able to move in parallel in the front-rear direction is operated in a single operation so that the front and rear positions of the seedling receiver can be switched in multiple stages relative to the shift position of each gear of the transmission device. The operating lever is connected to a lever, and this operating lever is located on the back of the seedling stand and directed toward the control section, and is also movable and fixed at multiple locking positions provided on the guide, so that it can guide the seedling receiver. The operating lever that is locked to the guide allows for reliable positioning, and by simply operating the operating lever while in the control section, the driver can perform operations away from the operating position each time, unlike conventional devices. Although it is possible to efficiently adjust the horizontal scraping width and vertical scraping length of pine seedlings at a constant ratio in multiple stages without moving to different positions, it also has a By switching the front and rear positions of the seedling receiver in multiple stages with respect to the gear position of can.

Moreover, even though the width of lateral scraping of pine seedlings is adjusted in conjunction with a stepped transmission,
By combining this transmission with multi-stage adjustment of the seedling receiver in addition to the stepped adjustment of the transmission, pine seedlings can be scraped in a nearly stepless manner.

Therefore, by simply operating the operating lever while staying in the control section, the vertical scraping length can be efficiently corrected to match the degree of compression of the pine seedlings, and can be adapted to changes in the vertical direction of the pine seedlings. This, combined with the fact that pine seedlings can be scraped to an almost infinitesimal state,
The number of seedlings planted per plant can be efficiently stabilized.

[Brief explanation of the drawing]

The drawings show one embodiment of the invention,
Fig. 1 is a side view showing the general structure of the rice transplanter, Fig. 2 is a side view of the scraping amount adjustment mechanism, Fig. 3 is a plan view showing the support mechanism of the seedling receiver, Fig. 4 is the same side view, Fifth
The figure is a plan development view of the scraping amount adjustment mechanism. 7... Seedling receiver, 10... Scraping amount adjustment lever, 20...
Screw shaft for horizontal feed, 24...Shifter, 25...
Shift fork, 27...Switching lever, 28...Wire, 29...Rod.

Claims (1)

[Claims] 1. A transmission device configured to be able to switch a screw shaft for lateral movement of the seedling platform to multiple speeds, and a seedling receiver provided at the front end of the seedling platform and configured to be able to move in parallel in the front-rear direction. are interlocked and connected to a single operating lever so that the front and rear positions of the seedling receiver can be switched in multiple stages relative to the gear position per gear of the transmission, and this operating lever is connected to the rear surface of the seedling stand. A scraping amount adjustment mechanism for a rice transplanter, characterized in that the scraping amount adjustment mechanism is located at a position and directed toward a control section, and is movably fixed at multistage locking positions provided on a guide.