JPH0238573Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to the structure of a so-called walking rice transplanter in which a worker operates the rice transplanter while walking.

This type of walk-behind rice transplanter has a pair of left and right control handles that extend toward the rear of the machine so that the operator can stably operate the machine, and it also makes it easier to feed seedlings onto the seedling platform. Therefore, a rearward-tiling seedling stand is installed on the top of both the left and right control handles. Providing a transverse feed mechanism for reciprocating the seedling table in the left and right directions on the back side of the seedling table means that
This cross-feeding mechanism is located below the operator's feet between the two operating handles, which is dangerous.

Therefore, in the present invention, by arranging the left and right longitudinal connecting rods that connect the lower portions of the left and right steering handles along the rear part of the traversing mechanism, the structural strength of both the left and right steering handles is improved, and The lateral movement member and rotating member of the lateral feed mechanism are separated from the lower part of the worker's legs by a connecting rod to ensure the safety of the worker.

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 bolted to the rear surfaces of the seedling planting cases 9 and 10. After tightening and extending approximately horizontally rearward from the base end, the lower part of the rear surface of the seedling stand 17 is curved backward in side view, and from there it is bent diagonally upward, and the upper surface of the inclined part is bent. A rearward-tilting seedling stand 17 is provided, which is supported so as to be movable laterally to the left and right by a guide rail 15 horizontally mounted between the control handles 13 and 14 and a rail mechanism 16 to be described later. There is.

That is, the seedling stand 17 is supported and guided by a downward U-shaped slider 58 provided at its lower end, which is slidably fitted onto the upper surface of the square guide portion 15' of the guide rail 15. As shown in FIGS. 4 and 5, the rail mechanism 16 in the seedling platform 17 includes an upward U-shaped rail 59 attached to the back of the seedling platform 17 in parallel with the guide rail 15, and both operating handles 13, 14. It consists of an inverted L-shaped support 60 attached parallel to the guide rail 15 on the side, and sliders 61 attached to the support 60 at appropriate intervals in the longitudinal direction are attached to the upward U-shaped rail 59. The slider 61 is slidably fitted into the slider to guide and support the seedling stand and to restrict the upward movement of the seedling stand.In this case, a roller may be used instead of the slider 61. good.

In arranging a lateral movement mechanism for horizontally moving the seedling platform 17 in the curved portions of both operating handles 13 and 14 on the back side of the seedling platform 17,
A transverse feed shaft 18 having a reciprocating thread groove 19 on the outer periphery,
It is disposed parallel to the moving direction of the seedling table 17, and both left and right ends of the horizontal feed shaft 18 are connected to the two operating handles 13,
A boss body 22 is supported by bearings 20 and 21 attached to the upper surface of 14, and is slidably fitted on the horizontal feed shaft 18.
A cylindrical receiver 47 is provided with a boat-shaped key 23 that engages with the reciprocating screw groove 19, and an engagement piece 46 with the sliding boss body 22 integrally formed thereon is attached to the back surface of the seedling stand 17. By inserting it into the seedling tray 17 and relating it to the seedling tray 17, the seedling tray 17 is reciprocated from side to side by rotation of the transverse feed shaft 18 in the direction of arrow A (that is, in the direction of pushing up the seedling tray 17). On the other hand, the cylindrical receiver 47 is provided with a pair of left and right adjustment screws 48 and 49 that sandwich the engagement piece 46 inserted therein from both left and right sides. The relative positions of the sliding boss body 22 and the seedling stand 17 in the left and right direction are configured to be freely adjustable.

On both sides of the horizontal feed shaft 18, there are vertical feed cams 44, 45 for vertically feeding the seedlings on the seedling table 17.
On the other hand, a vertical feed shaft 51 equipped with a plurality of ratchet wheels 50 whose outer periphery partially protrudes from the upper surface of the seedling platform 17 is provided at the lower part of the rear surface of the seedling platform 17, and a pair of left and right bearings 52 and The central bearing 53 integrally formed with the cylindrical support 47 is pivotally supported substantially parallel to the horizontal feed direction, and rotation is transmitted only in one direction to the vertical feed shaft 51.
Freewheel 5 that spins in the opposite direction
A pair of left and right wheels 4 are provided, and both free wheels 54, 54 are provided.
A lever 55 integrally provided on the seedling stand 17
At the end of the left and right horizontal feed, the vertical feed cams 44, 45
By kicking and rotating the seedling table 17 upward, that is, in the direction of pushing up the seedling table 17, the vertical feed shaft 51 is intermittently rotated in the direction of arrow B, and the seedling pine on the seedling table 17 is sequentially fed vertically. ing.

Further, a sliding boss body 22 is provided on the lateral feed shaft 18.
Expandable bellows-type boots 56 and 57 are fitted on both sides of the left and right control handles 13 and 57, respectively.
14 are connected by a left and right longitudinal connecting rod 62, such as a tubular shape, to reinforce the strength of both operating handles 13, 14, and the rear surface of the seedling stand 17 and the connecting rod 62 are used to move the transverse feed shaft 18 back and forth. By arranging the connecting rod 62 at the rear position of the lateral feed shaft 18, the lateral feed mechanism and the vertical feed mechanism such as the boots 56, 57 and the left and right vertical feed cams 44, 45 are The handles 13 and 14 are partitioned so that they do not come into contact with the operator's legs or the like located between the two operating handles 13 and 14.

In both the seedling planting cases 9 and 10, claw shafts 24 and 25 are supported horizontally and laterally, respectively.
There is a vertically swinging seedling planting mechanism 2 on the inner end side of 4 and 25.
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 steering handle 13 to drive the seedling planting mechanisms 26 and 27. A sprocket 34 at the outer end of the claw shaft 24 in the seedling planting case 9;
A chain 37 in a chain case 36 is wound around a sprocket 35 at the outer end of the transverse feed shaft 18 to transmit rotation from the pawl shaft 24 to the transverse 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 arrow 27, the ground is leveled in advance using the leveling sections 42 and 43 of the floats 38 and 39, and the plants are planted in two rows in the subsequent field.

During these operations, both the left and right control handles 13, 1
The worker who holds 4 in his hand will be located between the two, and the lower part of his leg will be close to the rotating lateral feed shaft 18 in the lateral feed mechanism and the vertical feed cams 44 and 45 at both ends, so if there is no connecting rod 62. However, according to the present invention, the worker's legs or clothes may come into contact with the horizontal feed shaft 18 and the vertical feed cams 44, 45 at both ends of the feed shaft 18, which is dangerous.
By arranging the connecting rod 62 near the rear of the cross-feeding mechanism, it can be separated from the rear, and the safety of the worker can be ensured. Moreover, this connecting rod connects the lower portions of both the left and right steering handles, and has the effect of increasing the structural strength of both the steering handles.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which Fig. 1 is a side view of the rice transplanter, Fig. 2 is a plan view, Fig. 3 is an enlarged sectional view taken along the line - - of Fig. 1, and Fig. 4 is a - line of Fig. 1. FIG. 5 is an enlarged cross-sectional view taken along the - line in FIG. 3. 1...Vehicle frame, 2...Engine, 3...
Transmission case, 4, 5...Side frame, 7...
Swing case, 8... Wheels, 9, 10... Seedling planting case, 26, 27... Seedling planting mechanism, 13, 14
... Control handle, 17 ... Seedling stand, 18 ... Horizontal feed shaft, 44, 45 ... Vertical feed cam, 56, 57
...Boots, 62...Connecting rod.

Claims (1)

[Scope of utility model registration request] In a rice transplanter, a pair of left and right control handles extending rearward are protruded from the rear of the body frame, 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. A transverse feeding mechanism for moving the seedling platform left and right is provided between the lower part and the rear surface of the seedling platform, and a left and right longitudinal connecting rod connecting the two is installed between the lower portions of both operating handles. A walking rice transplanter installed along the rear of the rice transplanter.