JPH0335709A - Multiple-row transplantation machine - Google Patents

Abstract

PURPOSE:To prevent the damage of a seedling transplantation claw and improve the safety of operation by using an upper stop mechanism to stop a seedling- transplantation claw of each transmission case at a position above the surface of the field and placing the stop mechanism on the claw shaft. CONSTITUTION:A shaft 58 for transmitting power to each transmission case 26 is inserted into a plurality of transmission cases 26 arranged in parallel and into cylindrical parts 55, 56 connecting the transmission cases with each other. Each transmission case is provided with a claw shaft 27 to transmit power from the above power-transmission shaft 58 via an endless chain 40 and a seedling-transplantation claw 28 is attached to the claw shaft 27. The seedling-transplantation claw 28 of each transmission case of a transplantation machine is made to be stopped above the surface of the field by an upper stop mechanism 49 placed on the claw shaft 27. The apparatus surely prevents the damage of the power transmission shaft of the seedling-transplantation claw 28 of each transmission case 26 caused by torsional deformation and that of the endless chain caused by elongation and improves the safety of operation.

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) is disclosed in Japanese Patent Application Laid-open No. 52-65, for example.
As described in Publication No. 015, etc., each transmission case is provided with a pawl shaft equipped with a seedling pawl, and power is transmitted to the pawl shaft from the power transmission shaft via an endless chain, while the cylinder The power transmission shaft inserted into the shaped 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.

[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 provided on the power transmission shaft inserted into the cylindrical member, the single upper stop mechanism can Although it has the advantage of being able to stop all the seedling-planting claws at the same time, the power transmission shaft is not only subject to torsional deformation, but also to the endless chain between the power transmission shaft and each claw shaft. Since extensional deformation occurs, the seedling planting claw in each transmission case is such that the stopping position of the seedling claw in each transmission case is displaced due to torsional deformation of the power transmission shaft and extensional deformation of the endless chain. Although it stops at a position upwardly away from the field, the seedling planting claws in other transmission cases may stop at a position where it enters the field, causing damage to the seedling planting claws. .

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 described with reference to the drawings. In the drawings, reference numeral 1 indicates a fuselage consisting of a front fuselage 2 with seats 4 and a rear fuselage 3, and both the front and rear fuselages 2.3 are hollow mission cases. Form each and give them both mission 5,
The rear end of the front fuselage 2 and the front end of the rear fuselage 3 are connected via the vertical shaft 7 so that they can be bent horizontally. case 8
The wheels 10 and 11 are mounted through the front wheels 10 and 11, and the distance between the ruts on both the front wheels 10 and the rear wheel 11 is as follows for the seedling planting spacing ``1''. "4"
The distance between the ruts of the wheels 11 after rain is set to be "2".

The engine I2 attached to the rear end of the rear fuselage 3 is connected to the input shaft 13 of the rear transmission 6, and the output shaft 14 of the rear transmission 6 is connected to the front transmission in the front fuselage 2 via the vertical shaft 7. The output shaft 16 of the front mission 5 is connected to the PTO shaft 17 protruding from the front surface of the front body 2 via a main clutch mechanism 18 for seedling and simultaneous stopping. While each wheel IO
211, the aircraft 1 travels by transmitting power from both missions 5 and 6, respectively.

Further, a handle base 19 is provided at the front of the upper surface of the front body 2.
A chain 23 transmits power between the steering mechanism 21 of the control handle 20 provided thereon and a sprocket 22 attached concentrically to the vertical shaft 7 on the upper surface of the front end of the rear fuselage 3. It is configured to steer by adjusting the bending direction and degree of bending of both bodies 2 and 3 by the rotational operation of 20.

Reference numeral 24 is 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, and each seedling planting unit 25 has a transmission case 26 formed in an inverted "<" shape when viewed from the side, and a shaft at the tip thereof. A pair of seedling planting claws 28, 2 attached to both ends of the supported claw shaft 27
8, a seedling stand 34, and a float 33 located on the lower surface of each transmission case 26.

A bumper 31 made of pipe is arranged in front of the seedling planting device 24, and from the bumper 31 each seedling planting unit 25
A branch pipe 92 protruding from each is fixed to the tip of each transmission case 26, and 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 of the seedling planting unit 25, the 92 branch pipes of the bumper 31 and the top surface of the tip of the float 33 are connected via a bendable inverted "<"-shaped link 32. While the bracket 33 is attached to be movable up and down, the bracket 33 fixed to the upper surface of the middle part of the float 33 is attached to the side surface of each transmission case 26 with a pin 30a.
The float 33 is attached to the lower end of a lever 30 with a handle 29, which is pivotally attached at a pin 30b, so that the float 33 can be adjusted vertically. At this time, an arcuate scale fixing plate 26' is attached to the base of the lever 30 where the handle 29 is attached, so that the handle 29 can be detachably locked at any position.

Also, inside each transmission case 26, a drive shaft 35 and an intermediate shaft 3 are provided.
6, the rotation of the drive shaft 35 is transmitted to the intermediate shaft 36 through the chain 3, and an endless chain 40 is provided between the free rotating sprocket 38 on the intermediate shaft 36 and the free rotating sprocket 39 on the pawl shaft 27. Further, a safety mechanism 41 is provided on the intermediate shaft 36 to automatically cut off the power transmission when the power transmitted to the pawl shaft 27 exceeds a certain level.
On the pawl shaft 27, a clutch 43 with a sliding key 42 locked,
A spring 44 is provided to bias the clutch 43 so as to constantly engage the idle sprocket 39, and a pin 46 with a knob 45 is provided at the tip of the transmission case 26, and is rotatable around its axis. The tip of the pin 46 is engaged so that its semicircularly cut inner end extends into one side of the flange 47 on the outer periphery of the clutch 43, and the pin 46 has a 180° angle. When the clutch 43 is released by rotation, the recess 48 on the side surface of the collar 47 is removed.
An upper stop mechanism 49 is provided which fits into the pin 46 to stop the seedling planting claws 28, 28 at an upper position (a position upwardly away from the field).

A flange portion 50.51 is integrally formed on both left and right sides of the rear end of the transmission case 26 in each seedling planting unit 25, and both ends of the drive shaft 35 are connected to the outside of the transmission case 26 from the center of the flange 50.51. protrudes into the screw shaft 5 and connects one end to the screw shaft 5.
2, a cylinder whose other end is formed into a circular shaft 53, and which connects each transmission case 26 in each seedling planting unit 25 to a flange 50.51 formed on the side surface thereof with a bolt 54; Power transmission shafts 57 and 58 are connected by shaped members 55 and 56 and inserted into this cylindrical member 55 and 56.
are removably joined to the threaded shaft 52 and the circular shaft 53 of each drive shaft 35 in each transmission case 26 to connect each drive shaft 35, 35.35 in a line, and each transmission case 26
An input shaft 60 that transmits power to the drive shaft 35 via a pair of bevel gears 59 is pivotally supported at the rear end of the transmission case 26 located in the center.

Reference numeral '61 indicates a cross-feeding device for the seedling platform 34, and the cross-feeding device 61 includes a cross-feeding case 62 that incorporates a cross-feeding mechanism for reciprocating the seedling platform 34 in the lateral direction.
A narrow hollow protrusion 62a is integrally formed on the transverse feed case 62, and the hollow protrusion 62a is connected to the transmission case 26 located at the center of each of the transmission cases 26. The hollow protrusion 62 is inserted between the joint between the flange 51 and the cylindrical member 56 and mounted.
A chain 63 for transmitting power from the drive shaft 35 in the transmission case 26 to the transmission mechanism 64 in the transverse feed case 62 is provided in the transmission case 26.

Further, the transmission mechanism 64 is disposed in the cross-feeding case 62.
A cylindrical cam shaft 65 to which power is transmitted from the cylindrical cam shaft 65 and a slidable feed shaft 66 are provided in parallel. The feed shaft 66 has its boat-shaped key 67 engaged with the reciprocating spiral groove 68 of the camshaft 65, and is horizontally fed by the rotation of the camshaft 65, and at the right and left ends of the feed shaft 66. It is configured to come into contact with both fixed cams 69 on the camshaft 65 and swing and rotate intermittently.

Furthermore, the transmission case 26 in each seedling planting unit 25
A cross-sectional long guide rail 70 is attached to the upper surface of the rectangular portion 7I of the longitudinal side edge of the long guide rail 70 via a metal fitting 72. An arm 74.74 having a trochanter 73 at its tip is attached to the flange portion 50.51 on the outer surface.

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 attached to the square part 71 of the guide rail 70, and the upper guide rail 7
6 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.
A removable pin 78 is provided at the tip of the letter-shaped metal fitting 77 to prevent the upper guide rail 76 from coming off the trochanter 73.

On the back surface of the seedling platform 34, both ends of the feed shaft 66 are connected via a bracket 79, and seedling mat feed wheels 80 protruding from the top surface of the seedling platform 34 are provided at appropriate intervals. A vertical feed shaft 81 is attached via a bearing 82, and a one-way clutch 8 is provided on the vertical feed shaft 81.
3 and the lever 84 attached to the end of the feed shaft 66 are connected by a link 85.
The one-way clutch 8 is connected via the feed shaft 66.
3, the vertical feed shaft 81 is rotated intermittently one pitch at a time.

The seedling planting device 24 configured in this way has a cylindrical member 5
A pair of left and right lower links 87 connected to each of the pieces 86 and a pair of left and right lower links 87 attached to the rear end of 5.56 are installed upright from a cylindrical member 55, 56, etc. along the back surface of the seedling stand 34. Top link 8 connected to the tips of a pair of left and right masts 88
At 9, a lift arm 9 is attached to the front body 2 so as to be vertically movable and engages with both lower links 87.
The input shaft 60 is configured to move up and down greatly from the front body 2 side with a rotation operation of 0, and the input shaft 60 is connected to the PTO shaft 1
Power is transmitted via a telescoping shaft 91 that connects between the two.

In this configuration, an operator sits on the seat 4 and the seedling planting device 2
4 is lowered until each of the floats 35 are set on the field, and then the machine 1 is moved forward, and the seedling planting device 24 is slid with each float 33 set on the field, and the PTO axis of the machine 1 is moved forward. 17 to the input shaft 60 is transmitted from each drive shaft 35 to each transmission case 2 via power transmission shafts 57 and 68 in cylindrical members 55 and 56 connected in a row.
The signal is transmitted from the drive shaft 35 to the camshaft 35 and drives the feed shaft 6.
At the same time as the seedling stand 34 to which the seedling tray 6 is attached 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 feed. The seedlings on the seedling platform 34 are planted one by one along a plurality of rows (six rows in this embodiment) using the seedling planting claws 28, and in this case, the adjustment links 30 protruding from the upper surface of each transmission case 26 If the handle 29 is rotated forward, the height between the float 33 and the transmission case 26 will be lowered.On the other hand, since the seedling planting claw 28 is always rotated at a constant radius, the depth of seedling planting will be increased. On the other hand, if the handle 29 is rotated backward as shown by the two-dot chain line in FIG. By adjusting the height between the float 33 and the transmission case 26 by rotating the attachment link 30, the planting depth of seedlings in the field can be set arbitrarily.

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 disengaged. Since the rotation of the claw shaft 27 stops 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 are in the raised position (
It will stop at a position that is far above and away from the field.

In this case, the pawl shafts are made into two pawl shafts 27 a and 27 b separated at the center as shown in FIG.
Clutch 43a with springs 44a and 44b on a and 27b
, 43b are provided respectively, and pins 46a, 4 with engagement/disengagement knobs 45a, 45b are provided for each clutch 43a, 43b.
If the upper stop mechanisms 49a and 49b, which are provided with the upper stop mechanism 6b, are provided for each of the seedling planting claws 28, 28, the seedling planting claws 28 in one transmission case 26 can be individually stopped individually. Also, each transmission case 26
A safety mechanism 41 is provided between the drive shaft 35 and the claw shaft 27.
By providing these, it is possible to prevent the claws from being damaged due to excessive load on each seedling planting claw 28, and it is safe. Needless to say, it is okay to use it as a structure.

In the above embodiment, as shown in FIGS. 5 and 11, three transmission cases 26 are arranged in parallel to form a six-row structure, but as shown in FIG. 1O, , by arranging two transmission cases 26 in parallel and inserting the hollow protrusion 62a of the cross-feeding case 62 in the middle of the cylindrical member 55 or 56 that connects the transmission cases 26, a four-row structure is formed; Alternatively, as shown in FIG. 12, the transmission case 2
Cylindrical member 55 or 5 6 arranged in parallel and connecting between them
6, there is a hollow protrusion 6 in the cross-feeding case 62.
By inserting 2a, it is possible to construct an 8-row planting structure.

[Action/effect of the invention]

As described in the claims, the present invention consists of a plurality of transmission cases arranged in parallel and a cylindrical member connecting the respective transmission cases, and within the cylindrical member, there is a connection to each transmission case. In a rice transplanter in which a power transmission shaft is inserted, a claw shaft is provided in each transmission case to which power is transmitted from the power transmission shaft by an endless chain, and a seedling planting claw is attached to the claw shaft,
An upper stop mechanism configured to stop the seedling planting claw in each of the transmission cases at a position upwardly away from the field surface;
By arranging the pawls on the shafts, the seedling pawls in each transmission case can be prevented even if the power transmission shaft is torsionally deformed and the endless chain is also extended and deformed. Since the machine can always stop at a position away from the field, it is ensured that the seedling claws in each transmission case will not be damaged due to torsional deformation of the power transmission shaft and elongation deformation of the endless chain. It has the effect of being able to prevent and be safe.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and 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 taken along the line II of FIG. 5 is a cross-sectional view of the seedling planting device, FIG. 6 is an enlarged sectional view taken along VI-Vl in FIG. 5, and FIG. 7 is a side view taken from ■-■ in FIG. 5. Enlarged view, Figure 8 is a sectional view of the upper stop mechanism for seedling planting claws, Figure 9 is another example of the upper stopping mechanism for seedling planting claws, and Figures 10, 11, and 12 show the number of rows changed. It is a figure which shows the state in case. 1... Airframe, IO... Front wheel, 11... Rear wheel, 24... Seedling planting device, 25... Seedling planting unit, 26... Transmission case, 27 , 27a, 27b・
... Nail axis, 28 ... Seedling planting nail, 55.56 ...
Cylindrical member, 57° 58...Power transmission shaft, 40...
・Endless chain, 49° 49a, ・49b...Top stop mechanism.

Claims (1)

[Claims] (1) Consisting of a plurality of transmission cases arranged in parallel and a cylindrical member connecting each transmission case, inside the cylindrical member,
A rice transplanter in which a power transmission shaft is inserted into each transmission case, a claw shaft is provided in each transmission case to which power is transmitted from the power transmission shaft through an endless chain, and a seedling planting claw is attached to this claw shaft. A multi-row rice transplanter characterized in that an upper stop mechanism is provided on the nail shaft to stop the seedling planting nails in each of the transmission cases at a position upwardly away from the field.