JPS6118654Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a fixed position stopping device for a seedling stand in a rice transplanter, particularly a riding rice transplanter.

Generally, this type of riding rice transplanter 1 has a body 5 supported by front wheels 2 and rear wheels 3, as shown in FIG. The driver's seat 7 is arranged in the middle of 5,
Further, a spare seedling stand 9 is arranged at the rear of the body 5. Further, at the rear of the body 5, a planting device 10 is supported by a link 11 and a hydraulic device 12 so as to be able to rise and fall freely, and the planting device 10 has multiple rows of planting rods 13,
It has a seedling stand 15 and a float 16.
The power of the engine 6 is transmitted to the transmission 17 via the clutch 14, and further to the front and rear wheels 2, 3 and the planting rod 13 of the planting device 10. The driver's seat 7 has a steering wheel 19 and a seat 20,
Furthermore, a planting device lift operating lever 21 and a fixed position automatic stop operating lever 22 for the seedling stand 15 are provided. The rice transplanter 1 advances by planting the seedlings on the seedling rack 15 using the planting rod 13.
When the number of seedlings on the top runs out, the driver operates a fixed position automatic stop operation lever 22 of the seedling table 15 to stop the seedling table 15, which is constantly moving from side to side during work, at the center position of its movement stroke. Next, the planting device 10 is raised by the hydraulic device 12, and the tip 15a of the seedling stand 15 and the tip 9a of the preliminary seedling stand 9 are aligned, so that the preliminary seedling stand 23 on the preliminary seedling stand 9 is
is delivered onto the seedling stand 15. At this time, spare seedling stand 9
If the center positions of the seedling stand 15 and the seedling stand 15 do not substantially match, smooth delivery of the preliminary seedlings 23 will be hindered.
The seedling stand 15 is provided with a fixed position sensor for stopping the seedling stand 15 at the center of its travel. As shown in FIG. 6, this sensing sensor 18 is installed in the transmission case 25 of the seedling stand 15 using a cam action, and is attached to the seedling stand 15 moving in the directions of arrows A and B in the figure. Slide block 26 fixed via slide bar 28
The center position X--X is detected by vertical movement of a cam plate 27 provided on the cam plate 27 and a driven roller 29 in sliding contact with the cam plate 27 as shown in FIG. Due to the vertical movement of the roller 29, the transmission case 2
5 is transmitted to the arm 30 pivotally connected to the clutch wire 31, and the roller 29 is
As shown in FIG. 7, the highest position 27 of the cam plate 27
a, that is, when reaching the center of the seedling stand 15, the clutch 14 is cut via the wire 31 to stop the seedling stand 15.

However, it is extremely difficult to ensure that the clutch 14 is disengaged when the roller 29 reaches the highest position 27a, and
It was necessary to consider the wear of the wire 4 and the elongation of the wire 31. Therefore, in order to reliably disengage the clutch 14, the clutch 14 is configured to disengage when the roller 29 reaches the middle of the cam plate 27, that is, when it deviates from the center position by 1, as shown in FIG. Proposals have been made to overcome the above-mentioned drawbacks. However, in this case, clutch 1
4 is surely cut and the seedling stand 15 stops, but depending on the approach direction of the slide block 26, the stopping position of the seedling stand 15 is not constant within the range of both sides 1 from the center position, and there is no reserve. Considering the installation error of the seedling stand 9, there was a problem in the preliminary seedling supply work.

In view of the above circumstances, the present invention is configured so that the fixed position sensing operation by the cam plate and roller of the fixed position sensor can be detected in only one direction, reduces the range of variation in the stop position of the seedling stand, and The purpose of the present invention is to provide a seedling stand fixed position stopping device that aligns the spare seedling stand and the seedling stand with high precision when supplying seedlings and allows the spare seedlings to be smoothly transferred onto the seedling stand. be.

Hereinafter, the present invention will be specifically explained based on an embodiment shown in the drawings.

Since the outline of the riding rice transplanter 1 has already been explained with reference to FIG. 1, the explanation will be omitted. By the way, the planting device 10 has a transmission case 25, as shown in FIG. 2, and a transmission shaft 34 is connected to an input shaft 33 provided at the lower part of the transmission case 25 through a transmission 17. The rotation input from the input shaft 33 causes the case 25 to rotate as shown in FIG.
Traverse cam 3 rotatably supported on the top of
5 is transmitted via a chain 37 to a sprocket 36 attached to one end of the sprocket 5. A slide block 26 is engaged with the traverse cam 35, and the slide block 26 is press-fitted to the slide bar 28 whose both ends are fixed to the seedling tray 15 so as to be located in the center of the seedling tray 15. The rotation of 35 allows reciprocating movement in the directions of arrows A and B in the figure, and therefore, the seedling stand 15 can also move in the same direction. On the other hand, on the side of the traverse cam 35 of the slide block 26, as shown in FIG. 5, a cam plate 27 having a chevron-shaped cam curve is formed. The driven roller 29 is configured to be able to freely roll and come into contact with it. The center portion of the transmission case 25 protrudes forward, that is, downward in FIG. It is rotatably supported by the transmission case 25 by a connecting rod 42 passing through the transmission case 25.
As shown in FIG. 5, a contact piece 42a is formed at the tip of the connecting rod 42, and the driven roller 2
The lever 40 with the lever 9 pivotally attached thereto is inserted in a rotating state. Further, a spring 44 is provided between the lever 40 and the abutment piece 42a and is supported by the connecting rod 42, so that the lever 40, and therefore the driven roller 29 pivotally connected thereto, is constantly moved to the bent portion of the abutment piece 42a. 42b side, lever 40 in normal state.
The abutting piece 42a is configured to abut against the abutting piece 42a. On the other hand, an inner wire 43a of a Bowden wire 43 is pivotally connected to the tip of the arm 41 by a pin 45, and as shown in FIG. It is connected to a clutch lever 46 provided at the front. Further, a seedling stand fixed position automatic stop operation lever 22 is provided at the bottom of the driver's seat 7, and the operation lever 22 is operated by a stopper 47 that is operated by a push button 49 provided at the upper part of the lever 22. As a result, it is locked and fixed at the stop release position C and the stop position D. The lower part of the operating lever 22 is formed into an L-shape, and the tip thereof pivotally supports an outer wire 43b of a Bowden wire 43 connected from the tip of the arm 41. The outer wire 43b is fixed to the bracket 50 at the front of the machine body, while the inner wire 43a is pivotally connected to the end of the clutch lever 46 via the pin 51 as described above. The clutch lever 46 rotates around the fulcrum 52 to release the clutch 14.
The engine power is intermittent by operating the operating lever 22, but if the lever is moved to the stop position D by the amount L that moves the outer wire 43b forward, the clutch lever 46 is moved in the direction of the arrow E in the figure. The movement of the clutch 14 is small, and the clutch 14 transmits power without disconnecting. However, the amount of retraction of the inner wire 43a required before the clutch 14 is disengaged decreases to L1-L=L2, where L1 is the normal amount of retraction at the release position C of the operating lever 22. Therefore, when the operating lever 22 is set to the stop position D, if the inner wire 53a is pulled in the E direction in the figure by L2 or more, the clutch 14 is cut, and the rice transplanter 1 stops advancing, and at the same time the planting device 10 also stops. The platform 15 also stops. Further, a clutch pedal 53 is connected to the clutch lever 46 via a clutch arm 55 and a rod 56, and the clutch 14, which becomes the foot, is connected to the clutch lever 46 via a clutch arm 55 and a rod 56.
Single operation is also possible. In addition, the preliminary seedling stand 9 is
It is installed on the upper part of the machine body 5 with its center aligned with the center of movement of the seedling stand 15.

Since the present invention has the above-described configuration, when planting rice using the riding rice transplanter 1, the operation lever 22
Put it in the stop release position C and perform the rice planting work. As shown in FIG. 1, the power of the engine 6 is input to the transmission case 25 through the clutch 14, transmission 17, and transmission shaft 34, and further through the chain 37 and sprocket 36 as shown in FIG. to rotate the traverse cam 35. Due to the cam action of the traverse cam 35, the slide block 26 engaged with the cam 35, the slide bar 28 fixed to the block 26, and the seedling stand 15 also move in the directions of arrows A and B in the figure. Move repeatedly. At this time, as the slide block 26 moves left and right, the cam plate 27 of the slide block 26 also moves left and right and encounters the driven roller 29 near its center position. Under normal conditions, clutch 1
4, a clutch return force is applied to the arm 41 via the wire 43a. Therefore, if the driven roller 29 is not in sliding contact with the cam plate 27, that is, the slide block 26 is moved to the left or right. When in the offset position, the sensor 18 and the arm 41 are located at the neutral position N in FIG. Now, when the slide block 26 is moving from the left side in FIG. roller 29
rolls along the right mountain 27b and rotates in the direction of arrow B' in the figure. When the roller 29 moves in the B' direction, the lever 40 pivotally connected to the roller 29 rotates in the B' direction about the connecting rod 42, and the lever 40 similarly rotates in the B' direction.
and the contact piece 4 which is in contact with the spring 44.
2a, therefore, the connecting rod 42 and the arm 41 rotate in the direction of arrow F in the figure to draw the inner wire 43a of the Bowden wire 43 downward in the figure. At this time, when the roller 29 reaches the highest position 27a of the cam plate 27, the wire 43a is pulled in the maximum amount, but the maximum amount of the wire 43a is set to L.
3, L3 is when the operating lever 22 is at the release position C.
, the retraction amount L1 is smaller than the amount L1 required to disengage the clutch 14, and the clutch 14 cannot be disengaged.Conversely, the return force from the clutch 14 acts on the arm 41, and the roller 29 moves toward the cam plate 27.
While rolling along the left mountain 27c, it finally separates from the cam plate and returns to the neutral position N together with the arm 41. Next, when the slide block 26 approaches from the right side in FIG.
Although the contact piece 42a is urged toward the bent portion 42b by the contact member 4, it is inserted into the connecting rod 42 in a rotating state. Even when the lever 40 rolls on the cam plate, only the lever 40 rotates in the direction A' in the figure against the spring 44, and the connecting rod 42
And the arm 41 remains stopped at the neutral position N and does not make any movement. Further, when the roller 29 is separated from the cam plate, the roller 29 is moved by the spring 44.
9 will return to the neutral position N. In this way, as long as the operation lever 22 is placed in the stop release position C and the rice planting work is performed, the seedling stand 15 continues to move left and right and will not stop.

Next, when there are only a few seedlings on the seedling stand 15 and you want to supply the spare seedlings 23 on the spare seedling stand 9, put the operating lever 22 in the stop position D and operate the outer wire 43b. Inner wire 43
Set the required pull-in amount of a to L2. At this point, if the slide block 26 in the transmission case 25 is moving toward the right side in FIG. The rod 42 and arm 41 do not rotate, and the clutch does not break. Slide block 26 is indicated by arrow B from the left in the figure.
If the vehicle approaches the roller 29
The lever 40, the connecting rod 42, and the arm 41 rotate due to the rotation of the inner wire 43a to the maximum amount L.
However, considering the offset amount H from the center position of the roller 29, the wire 43a is pulled in at a point G where the roller 29 is located to the right of the center of the cam plate 27 and the seedling stand 15. When the amount L4 is set so that L4≧L2, the roller 29 reaches the point G and the seedling platform 15 reaches the center position of its travel, ensuring that the clutch 14 is disengaged and, at the same time, the rice transplanter 1 operates. stops, and naturally the seedling stand 15 also stops very close to the center position, and the seedling stand 15 and the spare seedling stand 23 are aligned. In this state, the driver raises the planting device 10, supplies the preliminary seedlings 23 from the preliminary seedling stand 9 onto the seedling stand 15, and then lowers the planting device 10 to continue the planting work. When resuming planting work, return the operating lever 22 to the stop release position C, and the clutch 14
are connected, and the rice transplanter 1 starts its work.

As explained above, according to the present invention, the fixed position sensing operation by the cam plate 27 and the roller 29 as the fixed position sensing sensor 18 operates in only one direction, so that Conventionally, the range of deviation varied within a range of 1 on both sides of the center position, but this can be reduced to a very narrow range near the center position. Therefore, the spare seedling stand 9 and the seedling stand 15 are aligned with high accuracy when the spare seedlings are supplied, and the spare seedlings 23 can be smoothly transferred onto the seedling stand 15. Furthermore, since the wire 43 can be adjusted by adjusting the amount of wire retraction corresponding to the movement of the cam plate 27 in only one direction,
It is not affected by backlash in the left and right direction due to the slide block 26 and the traverse cam 35. Furthermore, since the alignment accuracy of the seedling stand 15 and the preliminary seedling stand 9 is extremely high, it can be applied to an automatic auxiliary seedling feeding device. In addition, the support lever 40 of the driven roller is rotatably fitted into the connecting rod 42, and a contact piece 42a for restricting rotation of the lever 40 in one direction is fixed, so that the lever 40 can be used for placing seedlings. When the table 15 moves in one direction, the connecting rod 42 comes into contact with the contact piece 42a and rotates together, but when it moves in the other direction, it moves idly, so even when the seedling stand 15 moves in the other direction, If the lever 40 is damaged or
Inconveniences such as the seedling stand 15 locking do not occur.

[Brief explanation of the drawing]

Fig. 1 is a side view showing a riding rice transplanter to which the present invention can be applied, Fig. 2 is a schematic diagram showing an embodiment of a device for stopping a seedling stand in a fixed position, and Fig. 3 is a side view showing a fixed position stopping device for a seedling tray. FIG. 4 is an operating diagram showing the operation of the cam plate and roller, FIG. 5 is a perspective view showing the operating state of the sensing sensor, and FIG. 6 is a plan sectional view showing the proposed sensing sensor. FIGS. 7 and 8 are operational diagrams showing the operation of the sensing sensor. 1...Ride-on rice transplanter, 14...Clutch, 15...
...Seedling stand, 22...Fixed position automatic stop operation lever, 27...Cam plate, 29...Followed roller, 4
0... Lever, 42... Connecting rod, 42a... Hitting piece, 43... Bowden wire, 43a... Inner wire, 43b... Outer wire.

Claims (1)

[Scope of utility model registration request] A chevron-shaped cam plate is fixed to a seedling stand that moves from side to side during planting work, and a driven roller that can move in sliding contact with the cam plate is connected to the clutch via the inner wire of the Bowden wire. A rice transplanter in which the outer wire of the wire is connected to a fixed position automatic stop operation lever, and when the operation lever is at the stop position and the driven roller is moved by a cam plate, the clutch disconnects and stops the driven roller. A lever to be supported is loosely fitted onto a connecting rod so as to be rotatable in a plane parallel to the direction of movement of the seedling stand, and a contact piece for restricting rotation of the lever in one direction is fixed to the connecting rod. When the driven roller comes into sliding contact with the cam plate, when the seedling table is moved in one direction, the lever comes into contact with the contact piece and rotates the connecting rod connected to the inner wire, and moves the seedling table in the other direction. A seedling stand fixed position stop device configured so that only the lever moves freely during movement.