JPH0238572Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to the structure of a so-called one-wheeled walk-behind rice transplanter, which is equipped with only one wheel approximately at the center of the body frame of the rice transplanter.

In such a single-wheel walk-behind rice transplanter,
In order for the operator to stably operate the machine, a pair of left and right control handles must be provided extending toward the rear of the machine.Also, in order to feed the seedlings onto the seedling platform, the seedlings cannot be placed on the control handles. It is preferable to arrange the mounting table so that it is tilted backwards. In this case, if a cross-feeding mechanism for horizontally moving the seedling platform is provided on the front side of the seedling platform, a necessary space will be required between the rear end of the wheels and the seedling platform, and The overall length of the aircraft increases.

Therefore, in the present invention, the lower part of the operating handle is formed with a bulge that is curved away from the back surface of the seedling platform when viewed from the side, so that there is a space between the seedling platform and the operating handle that supports it on the back surface. By providing the feed mechanism, the overall length of the aircraft body is shortened and the transverse feed mechanism can be easily supported by the control handle.

The embodiment shown in the drawings will be described below. In the drawings, reference numeral 1 denotes a body frame of a rice transplanter, and the body frame 1 includes a transmission case 3 to which an engine 2 is attached on the upper surface, and left and right parts extending rearward from both left and right ends of the transmission case 3. A traveling transmission case 6 formed integrally with the transmission case 3, which is configured in a U-shape in plan with a pair of hollow side frames 4 and 5, has a swing extending rearward between the side frames 4 and 5. The front end of the case 7 is rotatably pivoted, and a running wheel 8 is provided at the tip of the swing case 7, which is located on the center line of the vehicle body frame 1. Case 6
Chain inside swing case 7 (not shown)
Rotationally driven through.

Seedling planting cases 9 and 10 are fixed to the rear ends of both side frames 4 and 5, respectively, and the two seedling planting cases 9 and 10 are connected by a gate-shaped connecting frame 11. A wheel lifting device 12 is provided between the mold connection frame 11 and the swing case 7, and by moving the wheels 8 up and down, the entire rice transplanter can be moved up and down.

Reference numerals 13 and 14 indicate a pair of left and right operating handles extending rearward from the seedling planting cases 9 and 10, and the base ends of the operating handles 13 and 14 are connected to the seedling planting cases 9 and 10 by bolts 52. , 53 is tightened and extended substantially horizontally backward from the base end, and is then curved rearward in side view at the lower part of the back surface of the seedling stand 17, which will be described later, to create a large space between the back surface and the seedling stand 17. A bulging portion 54 is formed so as to form a bulge, while the bulging portion 54 is bent obliquely upward from this portion, so that both operating handles 13 and 14 are each bent into an S-shape as a whole when viewed from the side. On the upper surface of the inclined part, there are both control handles 1.
A rearward-tilting seedling stand 17 is provided between the seedlings 3 and 14 and is supported by a guide rail 15 and a rail mechanism 16 horizontally mounted between the seedlings 3 and 14 so as to be movable laterally to the left and right.

Between the two operating handles 13 and 14, a connecting rod 55 connects the two at a position closer to the rear of the bulge 54, and the bulge 5 on the back side of the seedling stand 17
4 is provided with a cross-feeding mechanism for horizontally moving the seedling platform 17, in which a cross-feeding shaft 18 having a reciprocating screw groove 19 on the outer periphery is arranged parallel to the moving direction of the seedling platform 17. The left and right ends of the transverse feed shaft 18 are supported by bearings 20 and 21 attached to the upper surfaces of the operating handles 13 and 14, and a boss body 22 is slidably fitted onto the transverse feed shaft 18. In this example, a boat-shaped key 23 that engages with the reciprocating screw groove 19 is provided, and an engagement piece 46 with the sliding boss body 22 integrally formed therein is attached to the inside of the cylindrical receiver 47 that is attached to the back surface of the seedling stand 17. By inserting it into the seedling stand 17, the horizontal feed shaft 18
The structure is such that the seedling platform 17 is reciprocated from side to side by rotation in the direction of arrow A (that is, the direction of pushing up the seedling platform 17), and the cylindrical receiver 47
, a pair of left and right adjusting screws 48 which are arranged to sandwich the engaging piece 46 inserted therein from both left and right sides;
49 is provided to connect the sliding boss body 22 and the seedling stand 17.
The relative position in the left and right direction can be freely adjusted.

Further, seedling stands 17 are provided on both sides of the horizontal feed shaft 18.
Vertical feed cam 4 for vertically feeding the upper seedlings
4, 45 are provided, while the horizontal feed shaft 18 is provided with a
Expandable bellows-type boots 50 and 51 are fitted on both sides of the sliding boss body 22.

In both the seedling planting cases 9 and 10, claw shafts 24 and 25 are supported horizontally and laterally, respectively.
At the inner end of 4 and 25 is a vertically swinging seedling planting mechanism 2.
6 and 27 respectively, and the bevel gear 28 on the pawl shaft 25 in the right seedling planting case 10 has a bevel gear 3 on the tip of the shaft 29 inserted into the right side frame 5.
0, the bevel gear 31 on the pawl shaft 24 in the left seedling planting case 9 meshes with the bevel gear 33 at the tip of the shaft 32 inserted into the left side frame 4, and the power from the engine 2 is transmitted. Double claw shaft 24, 25
A longitudinal chain case 36 is disposed between the outside of the left seedling planting case 9 and the outside of the left operating handle 13, Sprocket 35 at the outer end of the claw shaft 24 in the left seedling planting case 9
and the sprocket 3 at the outer end of the transverse feed shaft 18.
A chain 37 in a chain case 36 is wound around the shafts 5 and 5 to transmit rotation from the pawl shaft 24 to the lateral feed shaft 18.

Reference numerals 38 and 39 indicate a pair of left and right floats located on both sides of the wheel 8 and below both side frames 4 and 5 and both seedling planting cases 9 and 10. It is attached to the base of the control handles 13, 14 via a planting depth adjusting rod 40, and its front end is attached to both side frames 4, 5 via links 41 so as to be vertically movable. In this case, the inner surfaces of both floats 38 and 39 are integrally provided with flat portions 42 and 43 having a planar triangular shape, and the seedling planting mechanisms 26 and 27 are installed at the rear of both flat portions 42 and 43. Seedlings are now being planted.

In this configuration, if seedling mats are supplied onto the seedling platform 17 and the wheels 8 and the seedling planting mechanisms 26 and 27 are driven by starting the engine 2, the rice transplanter will
While the seedling stand 17 moves forward by the horizontal feed shaft 18
The seedlings on the seedling table 17 are moved back and forth from side to side by the rotation of the seedling planting mechanism 26, which swings up and down.
After the plants are divided one by one by the floats 38 and 39, they are planted sequentially along two rows in a field that has been leveled in advance with the leveling sections 42 and 43 of the floats 38 and 39.

In the present invention, a pair of left and right control handles that extend rearward are protruded from the rear of the vehicle body frame that has one wheel approximately in the center, and a rearward-tiling seedling stand is mounted on the upper surface of both control handles. Since it is arranged so that it can move freely, even with only one wheel, it is easy to balance the left and right sides of the aircraft using both the left and right steering handles. In addition, the seedling platform is of a backward tilting type, and the lower portions of both of the control handles are curved to form a large bulge in side view between the upper surface of both of the control handles and the lower part of the rear surface of the seedling platform. Since the bulging part is provided with a transverse feeding mechanism for transversely feeding the seedling platform from side to side,
Compared to arranging a cross-feeding mechanism between the rear end of the wheel and the lower end of the seedling stand, the lower end of the seedling stand can be brought closer to the rear end of the wheel, making it possible to shorten the overall length of the machine. . Furthermore, the horizontally long transverse feed mechanism can be supported by the bulges at the bottom of both the left and right control handles, and a separate frame member for supporting the transverse feed mechanism can be omitted, which has the effect of reducing the weight of the aircraft. .

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a side view of a rice transplanter, FIG. 2 is a plan view, and FIG. 3 is an enlarged cross-sectional view taken along the line -1 in FIG. 1...Vehicle frame, 2...Engine, 3...
Transmission case, 4, 5...Side frame, 8...
Wheel, 7... Swing case, 9, 10... Seedling planting case, 17... Seedling stand, 13, 14... Control handle, 54... Swelling part, 55... Connecting rod, 1
8...Transverse feed shaft, 36...Chain case.

Claims (1)

[Scope of utility model registration request] A pair of left and right control handles extending rearward are protruded from the rear of the vehicle body frame having one wheel approximately in the center, and a rearward-tilting seedling stand is disposed on the upper surface of both control handles so as to be able to reciprocate from side to side. In the rice transplanter, the lower portions of the control handles are curved to form a large bulge in side view between the upper surface of the control handles and the bottom of the rear surface of the seedling stand, and the bulge is provided with a large bulge in which the seedling plate is placed. A walk-behind rice transplanter equipped with a cross-feeding mechanism to cross-feed the table from side to side.