JPH056964B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an improvement in a so-called multi-row rice transplanter, which is constructed by arranging a plurality of transmission cases in parallel, each having a claw shaft with a seedling planting claw. It is something.

[Conventional technology]

Conventionally, this multi-row rice transplanter (in other words, a plurality of transmission cases each equipped with a claw shaft with seedling planting claws) were arranged in parallel and connected by a cylindrical member, and each transmission case was installed in this cylindrical member. (equipped with a power transmission shaft to the case)
For example, as described in Japanese Unexamined Patent Publication No. 52-65015, etc., each transmission case is provided with a pawl shaft having a seedling pawl, and an endless chain is connected to the pawl shaft from the power transmission shaft. The power transmission shaft inserted into the cylindrical member is provided with an upper stop mechanism that stops the seedling planting claws in each transmission case at a position upwardly away from the field surface. There is.

[Problem to be solved by the invention]

However, if an upper stop mechanism that stops the seedling planting claw at a position upwardly away from the field is installed on the power transmission shaft inserted into the cylindrical member, the single upper stop mechanism can be used. This has the advantage of being able to stop all the seedling planting claws at once, but on the other hand, the power transmission shaft suffers from torsional deformation and an endless chain between the power transmission shaft and each claw shaft. Therefore, the stopping position of the seedling planting claw in the transmission case is displaced due to the torsional deformation of the power transmission shaft and the extensional deformation of the endless chain, and the seedling planting in a certain transmission case is caused by extensional deformation. The claw stops at a position upwardly away from the field, but the seedling planting claw in other transmission cases may stop at a position where it enters the field, damaging the seedling planting claw. It was hot.

An object of the present invention is to provide a multi-row rice transplanter that prevents such a situation from occurring.

[Means to solve the problem]

In order to achieve this object, the present invention comprises a plurality of transmission cases arranged in parallel and a cylindrical member connecting the transmission cases, and a power transmission shaft to each transmission case is installed in the cylindrical member. In a rice transplanter in which each of the transmission cases is provided with a pawl shaft through which power is transmitted from the power transmission shaft through an endless chain, and a seedling planting pawl is attached to the pawl shaft, the seedling planting in each of the transmission cases is carried out. An upper stop mechanism for stopping the claw at a position upwardly away from the field is provided on the claw shaft.

〔Example〕

Hereinafter, embodiments of the present invention will be explained with reference to the drawings.
The figure shows a fuselage consisting of a rear fuselage 3 and a rear fuselage 3. Both the front and rear fuselages 2 and 3 are each formed in a hollow transmission case, and both have built-in transmissions 5 and 6.
The rear end of the front fuselage 2 and the front end of the rear fuselage 3 are horizontally bendably connected via a vertical shaft 7, and swing cases 8 and 9 are provided on both left and right sides of the front and rear fuselages 2 and 3, respectively. The wheels 10 and 11 are mounted through the wheels 10 and 11, and the distance between the ruts on both front wheels 10 and both rear wheels 11 is 4. '', the distance between the ruts of both rear wheels 11 is set to be ``2''.

Engine 12 attached to the rear end of the rear fuselage 3
is connected to the input shaft 13 of the rear transmission 6,
The output shaft 14 of the rear transmission 6 is connected to the longitudinal shaft 7.
The output shaft 16 of the front transmission 5 is linked to the input shaft 15 of the front transmission 5 in the front body 2 via the PTO
The wheels 1 are connected to the shaft 17 via a main clutch mechanism 18 for stopping the seedling claws all at once.
At times 0 and 11, the aircraft 1 travels by transmitting power from both transmissions 5 and 6, respectively.

Further, a handle base 19 is provided at the front part of the upper surface of the front body 2, and a control handle 2 provided thereon is provided.
0 steering mechanism 21 and a sprocket 22 attached concentrically to the vertical shaft 7 on the upper surface of the front end of the rear fuselage 3 through a chain 23,
The aircraft is configured to be steered by adjusting the direction and degree of bending of both bodies 2 and 3 by rotating the control handle 20.

Reference numeral 24 denotes a seedling planting device located in front of the front body 2. The seedling planting device 24 is composed of three seedling planting units 25 arranged in parallel.
Reference numeral 5 includes a transmission case 26 formed in an inverted "dog" shape when viewed from the side, a pair of seedling planting claws 28, 28 attached to both ends of a claw shaft 27 pivotally supported at the tip thereof, and a seedling mounting stand 34. It is generally constituted by a float 33 located on the lower surface of each transmission case 26.

A bumper 31 made of a pipe is arranged in front of the seedling planting device 24, and a branch pipe 92 protruding from the bumper 31 for each seedling planting unit 25 is fixed to the tip of each transmission case 26. Each seedling planting unit is connected to each other by the bumper 31, and side bumpers 93 are provided on both left and right sides of the seedling planting device 24.
One end thereof is attached to one end of the bumper 31, and the other end thereof is detachably attached to one end of the seedling platform guide rail 70.

When attaching the float 33 to the transmission case 26 in the seedling planting unit 25, the 92 branch pipes of the bumper 31 and the upper surface of the tip of the float 33 are connected by a bendable inverted dogleg-shaped link 32.
Float 3
The bracket 33 fixed to the upper surface of the middle part of 3,
The float 33 is attached so as to be vertically adjustable by being pivotally attached to the lower end of a lever 30 with a handle 29 via a pin 30a to the side surface of each transmission case 26 via a pin 30b. At this time, an arcuate scale fixing plate 26' is attached to the lever 30 at a location corresponding to the base of the handle 29, so that the handle 29 can be detachably locked at any position.

Each transmission case 26 is provided with a drive shaft 35 and an intermediate shaft 36, and the rotation of the drive shaft 35 is transmitted to the intermediate shaft 36 through a chain 37, and the free rotation sprocket 38 on the intermediate shaft 36 and the pawl are connected to each other. An endless chain 40 is wound around the idler sprocket 39 on the shaft 27, and an endless chain 40 is installed on the intermediate shaft 36 to automatically stop power transmission when the power transmitted to the pawl shaft 27 exceeds a certain level. The pawl shaft 27 has a clutch 43 to which a sliding key 42 is fixed, and the clutch 43 is connected to the free rotating sprocket 3.
9 is provided with a spring 44 that biases the transmission case 26 so as to always mesh with the transmission case 26, and a pin 46 with a knob 45 is provided at the tip of the transmission case 26 so as to be rotatable about its axis. The tip of the pin 46 has a semicircularly notched inner end that is connected to the clutch 4.
The pin 46 is rotated through 180 degrees to release the clutch 43, and the pin 46 is fitted into the recess 48 on the side surface of the collar 47. Seedling planting nail 2
8 and 28 are provided with an upper stop mechanism 49 configured to stop at an upper position (a position upwardly away from the field scene).

Transmission case 2 in each seedling planting unit 25
Flange portions 50, 51 are provided on both left and right sides of the rear end of 6.
are integrally formed, both ends of the drive shaft 35 protrude from the center of the flanges 50 and 51 to the outside of the transmission case 26, and one end is formed into a screw shaft 52 and the other end is formed into an occluded shaft 53, respectively. The transmission cases 26 in each seedling planting unit 25 are connected to each other by cylindrical members 55 and 56 that are connected by bolts 54 to flanges 50 and 51 formed on the side surfaces of the transmission cases 26, and the cylindrical members Both ends of the power transmission shafts 57, 58 inserted into the drive shafts 55, 56 are removably connected to the threaded shaft 52 and the circular shaft 53 of each drive shaft 35 in each transmission case 26, respectively. 35 are connected in a line, and a drive shaft 35 is connected at the rear end of the transmission case 26 located at the center of each transmission case 26.
An input shaft 60 that transmits power via a pair of bevel gears 59 is pivotally supported.

Reference numeral 61 indicates a transverse feeding device for the seedling platform 34;
A cross-feeding case 62 is provided with a built-in cross-feeding mechanism for laterally reciprocating the cross-feeding case 62.
, a narrow hollow protrusion 62a is integrally formed, and the hollow protrusion 62a is connected to the flange 51 of the transmission case 26 located at the center of each transmission case 26, and the cylindrical member 56. The drive shaft 35 in the transmission case 26 is inserted into the hollow protrusion 62a.
from the transmission mechanism 6 in the cross-feeding case 62.
A chain 63 for power transmission to 4 is provided.

Further, inside the transverse feed case 62, there is a cylindrical camshaft 65 to which power is transmitted from the transmission mechanism 64,
A slidable feed shaft 66 is provided in parallel. The feed shaft 66 has a boat-shaped key 67 that is connected to the cam shaft 6.
It is engaged with the reciprocating spiral groove 68 of No. 5, and is horizontally fed by the rotation of the camshaft 65, and at the right and left ends of the lateral feed comes into contact with both fixed cams 69 on the camshaft 65, and is intermittently moved. It is configured to swing and rotate.

Furthermore, a long guide rail 70 with an L-shaped cross section is attached to the upper surface of the transmission case 26 in each seedling planting unit 25 via a metal fitting 72 at a square portion 71 on one longitudinal side edge of the long guide rail 70. 26
Arms 74, 74 each having a trochanter 73 at the tip are attached to the flange portions 50, 51 on the outer surface of both transmission cases 26 located on the outer side.

Guide rails 75 and 76 having a U-shaped cross section are attached to the upper and lower sides of the rear surface of the seedling stand 34, and the lower guide rail 75 is connected to the square portion 71 of the guide rail 70.
Then, the upper guide rails 76 are fitted and engaged with the trochanters 73 at the tips of both arms 74, respectively, so as to be movable in the lateral direction. At this time, as shown in FIG. 7, a removable pin 78 is provided at the end of the L-shaped metal fitting 77 attached to the ends of both arms 74 to prevent the upper guide rail 76 from coming off the trochanter 73. To prevent.

Seedling mats are mounted on the back surface of the seedling platform 34, with seedling mat feeders 80 connected to both ends of the feed shaft 66 via a bracket 79 and protruding from the upper surface of the seedling platform 34 at appropriate intervals. Vertical feed shaft 8
1 is attached via a bearing 82, and a one-way clutch 83 provided on the vertical feed shaft 81 and a lever 84 attached to the end of the feed shaft 66 are connected via a connecting rod 85. One-way clutch 8
By swinging and rotating the shaft 3, the vertical feed shaft 81 is rotated intermittently one pitch at a time.

The seedling planting device 24 configured in this manner includes a pair of left and right lower links 87 connected to each of a pair of left and right attachment pieces 86 attached to the rear ends of the cylindrical members 55 and 56, and a pair of left and right lower links 87 of the seedling platform 34. A pair of left and right masts 8 are erected from cylindrical members 55, 56, etc. along the back surface.
The front body 2 is attached to the front body 2 by a top link 89 connected to the tip of the lower link 87 so as to be vertically movable. While the input shaft 60 is configured to move up and down greatly from the side,
A telescopic flexible shaft 9 connecting with the PTO shaft 17
Power is transmitted via 1.

In this configuration, if the operator sits on the seat 4 and lowers the seedling planting device 24 until each of its floats 35 is installed in the field, and then moves the machine body 1 forward, the seedling planting device 24 will move until each of its floats 33 The PTO axis 1 of the aircraft 1 is glided while installed in a field.
7 to the input shaft 60 is transmitted to the power transmission shaft 5 in the cylindrical members 55 and 56 connected in a row
7 and 68 from each drive shaft 35 to the seedling planting claws 28 and 28 of each transmission case 26 to drive them, and the drive shaft 35 to the camshaft 35 to which the feed shaft 66 is attached. At the same time as the seedling mounting table 34 is moved horizontally, the vertical feed shaft 81 is intermittently rotated one pitch at a time at the right or left end of the horizontal movement. At 28, the seedlings on the seedling stand 34 are planted one by one along multiple rows (six rows in this embodiment), and in this case, the handle 29 of the adjustment link 30 protruding from the top surface of each transmission case By rotating forward, the height between the float 33 and the transmission case 26 will be lowered. On the other hand, since the seedling planting claws 28 are always rotated at a constant radius, the depth of planting the seedlings will become deeper. Handle 2 as shown by the two-dot chain line in Figure 3.
By rotating the link 30 with the handle 29, the height between the float 33 and the transmission case 26 becomes higher and the seedling planting depth becomes shallower. 26
By adjusting the height between them, the planting depth of seedlings can be set arbitrarily in relation to the field.

To stop planting seedlings in each seedling planting unit 25, the pin 46 with the knob 45 provided on the transmission case 26 of each seedling planting unit 25 is rotated 180 degrees, and the clutch 43 is released and the flange 47 is Since the rotation of the claw shaft 27 is stopped at the position where the recess 48 engages with the pin 46, the seedling planting claws 28 at both ends of the claw shaft 27 can be stopped at a raised position (a position upwardly away from the field surface). become.

In this case, the pawl shafts are made into two pawl shafts 27a and 27b separated at the center as shown in FIG. Spring 44a, 44
Clutches 43a, 43b with b are provided respectively, and upper stop mechanisms 49a, 49b are provided with pins 46a, 46b with engagement/disengagement knobs 45a, 45b for each clutch 43a, 43b.
8 and 28, the seedling planting claws 28 in one transmission case 26 can be individually stopped, and in each transmission case 26, the drive shaft 35 and the claw shaft By providing the safety mechanism 41 between the main clutch mechanism 18 and the upper stop mechanism 49, 49a, 49b, the safety mechanism 41 can prevent the claws from being damaged due to excessive load on each seedling planting claw 28. It goes without saying that the safety mechanism 41 may have a structure other than that shown.

Note that in the above embodiment, the transmission case 26 is
As shown in the figure and Fig. 11, the case where three rows are arranged in a six-row configuration is shown, but the first
As shown in FIG. 0, two transmission cases 26 are arranged side by side, and a hollow protrusion 6 in the transverse feed case 62 is inserted in the middle of the cylindrical member 55 or 56 that connects the two transmission cases 26.
By inserting the transmission cases 2a, a four-row structure can be constructed, or as shown in FIG.
By inserting the hollow protrusion 62a of the cross-feeding case 62 in the middle of 5 or 56,
They can be arranged in rows.

[Action/effect of the invention]

The present invention, as described in the claims,
Consisting of a plurality of transmission cases arranged in parallel and a cylindrical member that connects the respective transmission cases, a power transmission shaft to each transmission case is inserted into the cylindrical member, and a In a rice transplanter comprising a pawl shaft through which power is transmitted from the power transmission shaft through an endless chain, and a seedling planting pawl is attached to the pawl shaft, the seedling planting pawl in each of the transmission cases is located upwardly away from the field surface. When the upper stop mechanism is arranged on the pawl shaft, and in addition to torsional deformation occurring in the power transmission shaft, extension deformation occurs in the endless chain. In this case, the seedling planting claws in each transmission case can always be stopped at a position upwardly away from the field, so that the seedling planting claws in each transmission case can be prevented from torsional deformation of the power transmission shaft and the endless chain. It is possible to reliably prevent damage due to elongation and deformation of the material, thereby ensuring safety.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a side view of the rice transplanter, FIG. 2 is a plan view of FIG. 1, FIG. 3 is an enlarged sectional view of FIG. 2, and FIG. 3 is a side view of FIG. 5, FIG. 5 is a cross-sectional view of the seedling planting device, FIG. 6 is an enlarged sectional view of FIG. 5, FIG. 7 is an enlarged view of FIG. 5, and FIG. 9 is a cross-sectional view of the upper part stopping mechanism for seedling planting claws, FIG. 9 is another example of the upper stopping mechanism for seedling planting claws, and FIGS. 10, 11, and 12 are diagrams showing the state when the number of rows is changed. be. 1... Airframe, 10... Front wheel, 11... Rear wheel, 24
... Seedling planting device, 25... Seedling planting unit, 26... Transmission case, 27, 27a, 27b... Claw shaft, 28... Seedling planting claw, 55, 56... Cylindrical member, 57, 58... Power transmission shaft, 40... Endless Chien, 49, 49a, 49b
...Top stop mechanism.

Claims (1)

[Claims] 1 Consisting of a plurality of transmission cases arranged in parallel and a cylindrical member that connects the transmission cases, a power transmission shaft to each transmission case is inserted into the cylindrical member, and a power transmission shaft to each transmission case is inserted into the cylindrical member. , in a rice transplanter comprising a claw shaft through which power is transmitted from the power transmission shaft through an endless chain, and a seedling planting claw is attached to the claw shaft, the seedling planting claw in each of the transmission cases is separated upward from the field surface. A multi-row rice transplanter, characterized in that an upper stop mechanism is provided on the claw shaft so as to stop the rice transplanter at a certain position.