JPH0242091Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to the structure of a forced planting device for a rice transplanter.

In a forced planting device that divides the seedling pine on the seedling stand in a rice transplanter using claws and forcibly pushes it into the field soil using a pusher, there are two prongs on one side of the planting rod. A shaped claw body is attached facing downward, while a rod is provided on the planting rod so as to be freely slidable along the axis line and moves up and down along the longitudinal direction inside the claw body in synchronization with the vertical swing drive of the planting rod. Since the extrusion tool is provided at the lower end of the rod, soil from the field and bed soil of pine seedlings tend to adhere to the extrusion tool and the lower part of the rod.

Furthermore, when the seedling pine is divided and held between the claws, the upper surface of the seedling pine comes into contact with the lower surface of the pushing tool, thereby regulating the posture of the seedling. Therefore, if there is a lot of mud attached to the extrusion tool, this mud will get caught between the upper surface of the seedling pine and the lower surface of the extrusion tool, disturbing the posture of the seedlings.

Therefore, in the present invention, a telescoping cover body that is elastic and has a variable volume is fitted between the lower end of the tip of the planting rod and the outer circumference of the rod extending downward from the tip, thereby preventing mud, water, etc. from adhering to the outer circumference of the rod. While preventing this, by utilizing the airtightness of this cover body and the vertical movement of the rod,
Air is introduced into the cover body from the planting rod in response to the downward protruding movement of the rod, and air is blown out from a passage provided along the rod toward the extrusion tool at the lower end of the rod in response to the upward retreating movement of the rod. This is intended to actively remove mud adhering to the extrusion tool using this ejected air, thereby solving the drawbacks of the conventional method.

Below, we will explain the drawings of an embodiment in which the present invention is applied to a riding-type rice transplanter.
indicates a running vehicle body, and the running vehicle body 1 consists of a vehicle body frame 2, two front wheels 3, 3 attached to the front lower surface thereof, and two rear wheels 5, 5 attached to the rear lower surface via chain cases 4, 4. A control seat 6 and a steering handle 7 are provided on the upper surface of the vehicle body frame 2, and the engine located on the front upper surface of the vehicle body frame 2 operates the vehicle bodies 3,
3, 5, and 5 to move forward.

Reference numeral 9 indicates a top link 10 at the rear of the traveling vehicle body 1.
A seedling planting device is shown which is attached so as to be able to move upwardly via a pair of left and right lower links 11, 11, and a hydraulic cylinder is provided between the traveling vehicle body 1 and the top link 10 to greatly raise and lower the seedling planting device 9. is provided.

The seedling planting device 9 includes a transmission case 13, and pipe-shaped support members 14, 1 on both left and right sides of the transmission case 13.
4, planting cases 15, 15, 15 are attached at appropriate intervals in the lateral direction, floats 16, 17, 16 are arranged on the lower surface of each planting case, and seedlings are inclined so that their upper ends approach the traveling vehicle body 1. A vertically swinging type seedling planting mechanism 19 is provided at the rear end of each planting case.

20 in each seedling planting mechanism 19 is each planting case 1
5 is a claw shaft whose tip protrudes from the side surface of the case 15 and is rotationally driven by a transmission mechanism within the case 15; 21 is a claw shaft 20;
22 is a link pivotally connected to an arm 23 protruding from the planting case 15 so as to be adjustable in length, and 24 is a planting rod having a hollow midway portion.

The end of the planting rod 24 is rotatably attached to the link 22, and a pin 25 of the crank 22 is rotatably supported on one side of the midway part of the planting rod 24 by a bearing 26, so that the rotation of the crank 22 is supported. Accordingly, the claw body 27 attached to the outside of the tip of the planting rod 24 is configured to swing up and down between the seedling outlet 28 at the lower end of the seedling platform and the field area.

On the outer surface of the tip 29 of the planting rod 24, the base of a claw body 27 whose lower end is formed into a pair of left and right claw pieces is attached to the bolt 3.
The bearing 39 of the tip part 30 is attached removably at 0.
A rod 32 for moving the pushing tool 31 up and down along the inside of the claw body 27 is fitted so as to be slidable in the axial direction thereof. The middle part of the operating rod 34 is rotatably supported in the hollow part 33 of the planting rod 24 by a shaft 35, and the tip of the operating rod 34 is connected to the upper end of the rod 32 via a slider 36. Lock and spring 37
While pushing the rod 32 downward, the circumferential surface of the cam 38 fitted on the crank pin 25 is brought into contact with the base end of the operating rod 34, and the lower end of the claw body 27 on the planting rod 24 is raised. When the rod 32 is in the uppermost position, the rod 32 is moved back so that the push-out tool 31 at the lower end of the rod 32 is located halfway inside the claw body 27, and the claw body 27 is moved back.
The vertical swing of the planting rod 24 and the forward and backward movement of the rod 32 are synchronized so that the extrusion tool 31 projects the rod 32 so that it comes to the lower end of the claw body 27 when it is at the lower limit position.

Further, one end of a telescopic cover body 40 such as a bellows type cover body 40 that covers the outer periphery of the rod 32 protruding from the lower end of the tip 29 of the planting rod 24 is attached to the tip 29,
The other end is attached to the outer periphery of the rod 32 to form a sealed shape.
On the other hand, a longitudinal passage 41 is bored in the rod 32 along its axis, and one end of the passage 41 is opened in the hollow part 33 of the planting rod 24, and the opening 42
An intake check valve 45 is provided to allow air to flow only from the hollow portion 33 toward the passage 41 against the force of a spring 44 applied to the ball 43. In addition, 46 is a hole bored in the planting rod 24 so as to communicate with the hollow part 33. The other end of the passage 41 opens near the pushing tool 31 at a position beyond the other end of the cover body 40, and air can be ejected into this opening 47 only in the direction against the force of the spring 49 applied to the ball 48. An exhaust check valve 50 is provided. Furthermore, an opening 51 is formed to open the middle part of the passage 41 into the cover body 40.

In this configuration, the float 1 of the seedling planting device 9
6, 17, and 16 are lowered to touch the field, the rice transplanter is advanced, and power is transmitted to the seedling planting device. When the crank 21 is lowered from the upper limit rotation position, the claws 27 move the seedlings at the lower end of the seedling stand 18. An appropriate amount of seedlings with soil are cut from the seedling pine at the takeout port 28, and the seedlings are lowered while being held between the left and right pair of claws at the tip of the claw body 27, and when they reach the lower limit position, they are cut into the cam 38 on the outer periphery of the crank pin 25. The operating rod 34 that comes into contact with the rod 34 is moved downward by the spring force to lower the rod 32, and the pushing tool 31 at the lower end pushes the top surface of the seedling soil downward, forcing the seedling soil into the field soil. (See the dashed line in Figure 2).

At this time, as the rod 32 protrudes downward, the volume inside the hermetic cover body 40 increases, so the inside becomes negative pressure, and the hollow part 33 of the planting rod 24
Air flows into the cover body 40 from the opening 51 through the passage 41 from the intake check valve 45 that opens inward. Next, as the rod 32 rises and retreats into the tip 29 of the planting rod 24, the cover body 40
When the internal volume decreases and the internal air pressure exceeds a certain pressure, the exhaust check valve 50 opens the opening 47.
Air is ejected in the direction of the extrusion tool 31 through the extrusion tool 31, and the mud adhering to the extrusion tool 31 is blown away and removed by the ejected air.

This air is ejected every time the extruder 31 sinks into the field and the rod rises, that is, when the extruder 31 and the claw body 2
Since this is carried out every time a large amount of mud has adhered to the pine seedlings 7, the posture of holding the seedling pine by the claws 27 and the pushing tool 31 can always be kept constant.

Note that a plurality of openings 47 may be provided that open toward the extrusion tool 31, and in this case, air may be ejected obliquely toward both left and right side surfaces of the bifurcated extrusion tool 31. Furthermore, in addition to or instead of providing a passage connecting the opening 47 on the extrusion tool 31 side and the inside of the cover body 40 on the inner diameter portion of the rod 32, a separate tube may be provided along the outer circumference of the rod.

In summary, the present invention provides the tip of the vertically swinging planting rod attached to the rice transplanter with a claw body that divides the seedlings on the seedling stand into individual plants when the rod is lowered. is provided with a rod with a pushing tool that pushes the split seedlings into the soil at its lower descending limit so as to move up and down, and between the tip and the outer periphery of the rod that protrudes from this, there is a rod that moves forward and backward according to the movement of the rod. Since a sealed cover body with variable volume is provided, mud does not adhere to the outer periphery of the rod, thereby eliminating rust from adhering to the rod and soil from getting caught in the sliding bearing part of the rod at the tip. , the durability of the rod and sliding bearing is improved. Air can be introduced into this airtight cover body according to the forward movement of the rod, and on the other hand,
Since an opening is provided near the extrusion tool to blow out the air inside the sealing cover body when the rod retreats, the forward and backward movements of the rod can be used to inject air into the sealing cover body and compress the air. By squirting mud, mud adhering to the extrusion tool and the claw body can be removed each time the rod moves backward, and the extrusion tool and the claw body are always cleaned before splitting the seedlings, so the posture of the seedlings can be adjusted. Good planting conditions can be obtained without causing any disturbance. Further, there is no need for a separate power source to obtain the compressed air, and the structure is extremely simple.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a plan view of a riding rice transplanter, Fig. 2 is an enlarged side sectional view of the main part taken along the - line in Fig. 1, and Fig. 3 is a - line arrow in Fig. 2. 4 is an enlarged cross-sectional view of the main part taken along the line - in FIG. 2, and FIG. 5 is an enlarged cross-sectional view of the main part taken along the line - in FIG. 1... Traveling vehicle body, 9... Seedling planting device, 15... Planting case, 18... Seedling stand, 28... Seedling take-out port,
19... Seedling planting mechanism, 24... Planting rod, 30... Tip, 33... Hollow part, 27... Claw body, 31...
... extrusion tool, 32 ... rod, 40 ... cover body,
41... passage, 42, 47... opening, 51...
Opening, 45... Check valve for intake, 50... Check valve for exhaust.

Claims (1)

[Scope of utility model registration request] The tip of the vertically swinging planting rod attached to the rice transplanter is provided with a claw that divides the seedlings on the seedling stand into individual plants when the rod descends. A rod with an extruder for pushing seedlings into the soil is provided to move up and down, and a volume between the tip and the outer periphery of the rod protruding from the tip is variable according to the movement of the rod back and forth, and A forced rice transplanter comprising: a closed cover body that introduces air into the rice transplanter as the rod moves forward; and an opening provided near the extrusion tool that blows out the air inside the cover body when the rod moves backward. Planting equipment.