JPH0353623Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial field of application) The present invention relates to a device for adjusting the amount of seedlings taken in a rice transplanter.

(Prior art) In general, a seedling removal amount adjusting device in a rice transplanter moves the lower end position of the seedling tray up and down with respect to the locus of the seedling planting claw of the planting mechanism. The amount taken can be adjusted.

The following has been proposed as an example of a seedling harvesting amount adjusting device for the rice transplanter as described above.

That is, a pair of left and right support arms that support a seedling stand that can be moved laterally in the left and right directions of the rice transplanter are erected at an appropriate distance from each other, and an operating lever is provided to move both support arms up and down simultaneously. It is disposed on the outer side of the fuselage than either one of the support arm bodies.

(Problems to be solved by the invention) The seedling removal amount adjusting device in the rice transplanter as described above has the following effects.

That is, for a worker who is normally located near the left-right center line of the machine body, the control lever is located further outside the machine body, so that it does not get in the way of the worker's walking, especially when the position and height of the control lever is low. If the control lever is placed outside of the control handle, it will be less obtrusive, and the control lever can be operated without getting under the seedling stand.

However, if the control lever is in a low position, it is difficult to operate.

(Means for solving the problem) Therefore, the technical problem of the present invention is to provide a rice transplanter whose operation lever is easier to handle and which does not interfere with the worker during work. The technical means of the present invention to solve this technical problem is to install a pair of left and right support arms that support a seedling stand that is movable laterally in the left and right directions of the rice transplanter, with appropriate distance between the right and left support arms. A control lever for moving the support arm up and down all at once is disposed on the outer side of the aircraft body than either of the support arm bodies, and for vertically moving the horizontal link and the support arm body that move together with the control lever. A horizontal link integral with the operating shaft is connected by a vertical link to form an approximately parallel link, and the operating shaft is configured to rotate at approximately the same angle as the operating angle of the operating lever.

(Effects of the invention) According to this technical means, by arranging the operating lever on the outer side of the machine body than the support arm body, the operating lever can be easily handled and does not get in the way of the worker during walking work. Not only is it effective, but by connecting the link mechanism, the operating lever and the operating shaft of the support arm body can be separated from each other. Therefore, the operating lever can be installed at a high place. Therefore, the amount of seedlings taken can be easily adjusted.

Therefore, the power transmission from the operating lever to the operating shaft is
Since the approximately parallel link is configured, the operating shaft can be rotated at approximately the same angle as the operating angle of the operating lever, and the amount of seedlings taken can be accurately adjusted.

(Embodiment) To explain the embodiment shown in the drawings below, in FIGS. 6 to 9, 1 is a body frame of a rice transplanter, and the body frame 1 includes a transmission case 3 on which an engine 2 is attached to the upper surface, and a transmission case 3 on which an engine 2 is attached to the top surface. A traveling transmission case 6 is formed integrally with the transmission case 3 and is configured in a U-shape in plan view with a pair of left and right hollow side frames 4 and 5 extending rearward from both left and right ends of the case 3.
The front end of a swing case 7 extending rearward between the side frames 4 and 5 is rotatably attached to the front end of the swing case 7, and a running wheel 8 located on the left-right center line of the fuselage frame 1 is attached to the tip of the swing case 7. The traveling wheels 8 are rotationally driven by the engine 2 from the traveling transmission case 6 via a chain in the swing case 7.

Moreover, at the rear ends of both side frames 4 and 5,
The seedling planting cases 9 and 10 are fixed to each other, and the two planting cases 9 and 10 are connected by a gate-shaped connecting frame 11, and a wheel lifting device 12 is provided between the side frame 5 and the swing case 7. By moving the wheels 8 up and down, the entire rice transplanter can be raised and lowered.

Reference numerals 13 and 14 indicate a pair of left and right control handles that extend rearward from the planting case 9 and 10, and both control handles 13 and 14 are bent in a rearward and upwardly inclined shape, and have a rearwardly inclined portion on the upper surface of the inclined portion. A seedling stand 17 of the type is supported so as to be movable in the left and right directions.

In addition, there is a claw shaft (not shown) in the seedling planting case 9.10, and a swinging type planting mechanism 16 is located on this claw shaft, which is driven by the engine through a transmission shaft (not shown) in both side frames. It's becoming like that.

Reference numerals 18 and 18 indicate a pair of left and right floats located on both sides of the wheel 8 and at the bottom of both side frames 4 and 5 and seedling planting cases 9 and 10, and the rear portions of both floats 18 and 18 are connected to both handles. 13,14
It is attached to the base of the plant via a planting depth adjusting rod 19, and its front end is attached to both side frames 4, 5 via links 20, 20 so as to be vertically movable.

Upper and lower guide rails 21 and 22 each having a U-shaped cross section are fixed to the upper and lower positions of the rear surface of the seedling stand 17, and the upper guide rail 21 is connected to the left and right operating handles 13,
14, while being fitted into the trochanter 23 protruding from the upper surface,
The lower guide rail 22, which has a downward U-shaped cross section, is slidably fitted into a square sliding rail portion 26 formed at one end of the left and right longitudinal seedling takeout frame 25. At this time, a gap is provided between the upper guide rail 21 and the trochanter 23 so that they do not catch each other even if the seedling stand 17 moves up and down in an appropriate dimension.

This seedling stand 17 is operated by both left and right control handles 13,1.
In order to support the control handles 13, 14 so as to be able to move up and down approximately along the upper surface thereof, and to adjust and fix their up and down positions, plate-shaped brackets 27, 27 are attached to the upper surfaces of the lower portions of both control handles 13, 14, respectively. 1, and support plates 29, 29 are fixed along the inner surfaces of both brackets 27, 27, respectively.

A pair of left and right support arms 30, 30 each having the seedling retrieval frame 25 mounted on the lower end thereof are disposed on the outside of the machine body 1 across the brackets 27, and are movable up and down. Bolts 31, 31 protruding inwardly and laterally from the side surfaces of the brackets 27 and support plates 29 are passed through elongated holes 32, 32, and are elastically biased by washers, springs 33, and nuts. Attach the arm body 30 to the bracket 27
and is supported vertically movably with respect to the support plate 29,
Moreover, it is constructed so that the position can be maintained at the vertically moving position.

Reference numeral 28 denotes a rotating shaft disposed on the left and right sides in the traveling direction of the aircraft body 1, and both left and right ends of the rotating shaft 28 are connected to one-end open groove type receiving portions 34, 34 formed on one side edge of the support plates 29, 29. This rotary shaft 2 is rotatably supported.
Both crankshaft portions 35 are eccentrically eccentric from the axis by an appropriate dimension r1 at both ends of the crankshaft 8 and protrude outward,
35 is a long groove 3 communicating with the bearing parts 34, 34.
6 and 36, it is rotatably inserted and supported on the side surfaces of both support arm bodies 30, 30.

Furthermore, an operating shaft 37 is fixed to the right end of the rotating shaft 28 at an appropriate distance r2 eccentrically from the axis, and extends from the right steering handle 14 to the outside of the fuselage by straddling the right support arm 30 and is attached to the operating lever 38.
Attach to the base of. The operating lever 38 is made of a flat leaf spring that is thin parallel to the axis of the rotating shaft 28 and wide in the circumferential direction substantially perpendicular to the axis, and its bifurcated base is the operating shaft. 37
It is bolted to the mounting piece.

Bracket 2 on the right steering handle 14
The longitudinal guide groove 40 of the side view arc-shaped guide plate 39 protruding from the side view guide plate 39 is passed through the middle part of the operating lever 38, and the side edge of the middle part of the operating lever 38 is integrally provided by bending the side edge. A locking portion 41 is disposed so as to face into a locking groove 42 which is cut out at appropriate intervals along one side edge of the longitudinal guide groove 40, and the operating lever 38 is held against its own spring elasticity. When the control lever 38 is not bent, the locking portion 41 is pushed against the locking groove 42 by the spring elastic force of the control lever itself, and the locking portion 41 is disengaged from the locking groove 42. The structure is such that the system stops.

With this configuration, the operating lever 38 is bent against its own spring elastic force prior to seedling planting work,
With the locking portion 41 removed from the locking groove 42, if the operating lever 38 is rotated to the lower position as shown by the solid line in FIG.
is rotated by an appropriate angle, and as a result, both support arm bodies 30, 30, to which the eccentric crankshaft parts 35, 35 are pivotally attached, descend to the lower position, and are mounted on the two support arm bodies 30, 30. Seedling removal frame 25
At the same time, the seedling platform 17 also descends to the lower position. In this state, the overlapping dimension between the vertical swing locus of the seedling planting claw by each planting mechanism 16 and the seedling take-out opening of the seedling take-out frame 25 becomes large, and the amount of vertical seedling removal from the seedling pine on the seedling platform 17 is increased. I can do a lot. On the other hand, if the operating lever 38 is pulled up as shown by the dot-dashed line in FIG. 8, the amount of seedlings taken vertically by the seedling pine can be reduced.

At this time, each of the left and right support arms 37 is pressed against the bracket 27 and the support plate 29 by the elastic force of the springs 33 at a plurality of locations, so there is no wobbling while the support arms are moving up and down or while maintaining the position. .

In the present invention, the operating lever 38 and the operating shaft 37 are connected by an approximately parallel link as shown in FIG. 1 in the single-wheel rice transplanter as described above. In FIG. 1, the same parts as in FIGS. 8 and 9 are denoted by the same reference numerals.

That is, a horizontal link 43 that moves integrally with the operating lever 38 and a horizontal link 44 that is integral with the operating shaft 37 for vertically moving the support arm body 30 are connected by a vertical link 45.

Specifically, there is a boss 4 at the forked part at the tip of the operating lever 38.
6 is welded, and this boss 46 is the handle 1.
The horizontal link 43 is fitted onto the pin 48 of the metal fitting 47 of No. 4 and is rotatable around the pin 48, and the horizontal link 43 has a constricted portion corresponding to the boss 46, and its two-pronged tip is operated by a bolt 49. It is fixed to the lever 38. The operating lever 38 is the handle 1
It is operated along the guide groove 40 of the guide plate 39 attached to the bar 59 suspended horizontally between 3 and 14.

Therefore, the rotation shaft 28, the pivot shaft 50 between the horizontal link 44 and the vertical link 45, the pivot shaft 51 between the horizontal link 43 and the vertical link 45, and the pin 48 are the connecting points of the approximately parallel links.

Although there is no link between the pin 48 and the rotating shaft 28, the pin 48 and the rotating shaft 28 are joint points of fixed links in an approximately parallel link. The rotation shaft 28 is restricted by the open groove bearing portion 43 at one end and does not move up and down, but since it rotates itself, it moves back and forth to some extent. Therefore, since they are not completely connected points, they are approximately parallel links.

Therefore, the operating shaft 37 is operated at a rotation angle that is approximately equal to the rotation angle of the operating lever 38, which is almost the same as when operating the operating shaft 37 directly, but by using an approximate parallel link. Since the operating lever 38 can be operated at a position away from the operating shaft 37, the operating lever 38 can be placed at a high location and can be operated easily.

In addition, 52 is a hydraulic lever that opens and closes the valve of the wheel lifting device 12, and is operated along the guide groove 54 of the guide plate 53 attached to the bar 59 suspended horizontally between the handles 13 and 14.

55, 56, 57, and 58 are links and rods operated by hydraulic levers.

[Brief explanation of the drawing]

Fig. 1 is a side view showing the proposed device, Figs. 2 and 3 are enlarged views of the same parts as above, Fig. 4 is a partial rear view of the seedling stand partially cut away, Fig. 5 is a rear view of the connecting frame part,
FIG. 6 is a side view of a conventional rice transplanter, FIG. 7 is a plan view of the same, FIG. 8 is an enlarged sectional view of the operating lever portion of the same, and FIG. 9 is a sectional view taken along the line -2 in FIG. 13, 14...Handle, 17...Seedling stand, 2
5... Seedling extraction frame body, 27, 27... Bracket, 30, 30... Support arm body, 31... Bolt, 32, 32... Elongated hole, 33... Spring, 28...
...Rotation axis, 37...Operation axis, 38...Operation lever, 43...Horizontal link, 44...Horizontal link, 45
...Vertical link, 48...pin.

Claims (1)

[Scope of utility model registration request] A pair of left and right support arms that support a seedling stand that can be moved laterally in the left and right direction of the rice transplanter are erected at an appropriate distance from each other, and an operating lever for moving both the support arms up and down simultaneously is provided with one of the above-mentioned operation levers. It is arranged on the outer side of the aircraft body than one of the support arm bodies, and connects the horizontal link that moves integrally with the operating lever and the horizontal link that is integral with the operating shaft for vertically moving the support arm body with a vertical link. A seedling harvesting amount adjusting device for a rice transplanter, which is configured to form an approximate parallel link and rotate an operating shaft at approximately the same angle as the operating angle of an operating lever.