JPH048728Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a soil covering device for a flooded direct sowing machine that sows seeds and covers soil in paddy fields after puddling.

(Prior art) A flooded direct seeding machine that sows seeds directly into paddy fields connects a float to a support frame attached to a moving machine via a parallel link, as shown in, for example, Japanese Utility Model Application Publication No. 124410/1983. , a support body with an earth coverr attached to a mounting member fixed to a column erected on this float is pivotably supported vertically, and an elastic force in the direction of ground contact is applied to the earth coverr between the support frame and the support body. It is constructed by providing means for applying soil cover pressure to give the pressure.

The soil covering device is used to cover soil from the left and right sides of the seeding trench after sowing seeds in a trench formed with a trench cutter on the bottom of the float.Appropriate soil covering pressure must be applied to cover the optimum amount of soil. There is.

(Problems to be solved by the invention) In the prior art, when the float moves up and down relative to the support frame, the earthen cover also moves up and down accordingly, and because it is connected by parallel links, Since the distance between the earth-covering vessel and the support frame changes and the earth-covering pressure applying means is formed by a single substantially linear spring, the earth-covering pressure also changes greatly, making it difficult to obtain appropriate earth-covering pressure. It can become difficult.

(Means for Solving the Problems) The present invention combines the support body 29 of the earth-covering vessel 28 and the moving machine 1.
The pressure member 35 provided between the support frame 5 of
It is wound around the guide bodies 31 and 32 provided on the bracket 10 of the support frame 5 which pivotally supports the parallel link 8 and the column 11 of the float 7, and the parallel Distances L ₁ and L ₂ from both ends of one link of link 8 to pivot points P and Q
By making them substantially the same, the problems of the prior art described above can be solved.

That is, the specific structure of the problem-solving means of the present invention is characterized by connecting the bracket 10 fixed to the support frame 5 of the mobile device 1 and the support column 11 erected from the float 7 with a parallel link 8, vessel 28
A direct-flooding sowing machine, in which a support member 29 with a support member 29 attached thereto is pivotally supported on the pillar 11 so as to be able to swing vertically, and a pressure member 35 is provided between the support frame 5 and the support member 29 to apply soil cover pressure to the soil coverr 28. In the soil covering device, guide bodies 31 and 32 are provided around the support frame 5 and the support column 11, and guide bodies 31 and 32 are provided around which the elastic member 35 is wound. The distances L ₁ and L ₂ to the elastic member 35 wound around the elastic member 32 are set to be substantially the same.

(Function) The elastic member 35 that applies soil covering pressure to the earth covering vessel 28 is formed by directly connecting the wire 33 and the tension spring 34, and the guide body 31 is provided on the support frame 5 that pivotally supports the parallel link 8 and the float column 11, respectively. , 32. When the float 7 moves up and down with respect to the support frame 5 via the parallel link 8, the earthen cover 28 pivotally supported on the float 7 side also moves up and down.
Since the distances L ₁ and L ₂ from QU to the wires 33 on the guide bodies 31 and 32 are set to be approximately the same, even if the shape of the parallel link 8 changes to a square, parallelogram, etc., the distances L 1 and L 2 from the guide bodies 31 and 32 are Since the length of the wire between them is always approximately constant, the tension spring 34
The elastic force applied to 8 does not change, and therefore the soil covering pressure can always be kept substantially constant.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

In Fig. 3, reference numeral 1 denotes a mobile machine, which is a riding type rice transplanter as an example, but may also be a walking rice transplanter, a tractor, or a special vehicle. 3 are appropriately provided to form a flooded direct sowing machine 4.

Reference numeral 5 denotes a support frame fixed to the moving machine 1, on which the fertilizer applicator 2 and the seeding machine 3 are attached, and the tool bar 6 forms a part of the support frame 5. A float 7 of a seeding machine 3 is connected to the tool bar 6 via a parallel link 8 so as to be relatively movable up and down.

In FIGS. 1 to 3, a bracket 10 is provided protruding downward from the tool bar 6, a support column 11 is provided upward from the float 7, a bracket 12 fixed to the upper part of this support column 11, and a bracket 10 on the side of the support frame 5. Parallel links 8U and 8L are connected between them, with the bracket 10 side of the parallel link 8 serving as a fixed pivot point P, and the column 11 side serving as a variable pivot point Q that fluctuates with the relative vertical movement of the float 7.

The base of the arm 13 is rotatably fitted into the pivot pin QL on the movable side of the lower link 8L, and the upper end of the arm 13 is provided with an engaging portion 14 formed by a roller. The engaging portion 14 abuts and engages with the upper surface of the upper link 8U, and is slidable in the longitudinal direction.

A pulley 15 is rotatably provided on the fixed-side pivot pin PL of the lower link 8L, and a wire 16 is guided to the pulley 15. wire 16
is wound around a pulley 15 to form a U-shape, one end of which is connected to the arm 13, and the other end of which is connected to a tension spring 17. The upper end of the tension spring 17 is secured to a mounting member 19 fixed to a bracket 18 erected on the tool bar 6. The tensile force of the spring 17 presses the engaging portion 14 against the upper link 8U, thereby applying a downward force to the parallel link 8 and elastically pressing the float 7 in the direction of contact with the ground.

A groove cutter 26 and a groove former 27 are provided on the lower surface of the float 7, and a support body 29 of a soil covering device 28 is pivotally supported on the support column 11.

The soil covering device 28 is a left soil covering device 2 that covers soil from the left side of the trench.
8L and the right soil covering vessel 28R that covers soil from the right side.
The support body 29 is bolted or welded to a book rod-shaped support body 29, and the support body 29 is supported by the support column 11 via a pivot shaft 30 so as to be able to swing vertically, and is prevented from swinging downwardly by a stopper 41. A restriction is applied and its front end is pulled upwards.

A pulley 31 is pivotally supported on the fixed side pivot pin PU of the upper link 8U of the parallel link 8, and a pulley 32 is pivotally supported on the movable side pivot pin QL of the lower link 8L. A wire 33 is hung. One end of the wire 33 is connected to the support 29
The other end is connected to the front end of the tension spring 34.
is connected to the bottom end of. The spring 34 is a tension spring, and its upper end is locked to the mounting member 19.

At the position where the wire 33 is wrapped around the pulley 32, the distance L ₁ from the center of the pivot pin QU on the movable side of the upper link 8U is equal to It is approximately the same as the distance L ₂ . Therefore, even if the float 7 moves up and down and the parallel link 8 changes from a square to a parallelogram,
The length of the wire between the pulleys 31 and 32 is approximately the same as the length of each link of the parallel link 8, and is configured so that the length does not vary.
L and 28R can always be covered with soil at a substantially constant pressure.

The wire 33 and the tension spring 34 form a pressure member 35 that applies soil covering pressure to the earth covering device 28, and the length between the mounting member 19 and the support body 29 is adjustable, that is, the soil covering pressure can be adjusted freely. ing.
The pulleys 31 and 32 serve as guide bodies for setting the position of the elastic member 35 around which the elastic member 35 is wound and guiding the movement of the wire 33 in the longitudinal direction, and these constitute a covering pressure applying means. Each guide body may be a pin, roller, etc. in addition to a pulley, and its position does not have to be on the pivot pins PU, QL, and the wire 3 is connected to the pivot points P, Q at both ends of one parallel link 8U or 8L.
The distances L ₁ and L ₂ to the winding position No. 3 may be made approximately the same.

36 is a chute that guides the seed rice fed out from the feeding part 37 of the seed sowing machine 3, and a discharge tool 38 at the tip thereof.
is attached to a support rod 39 protruding from a bracket 18 fixed to the support frame 5.

(Effects of the invention) According to the invention described in detail above, the guide body 31 that wraps the elastic member 35 around the support frame 5 and the support column 11;
32 are provided, and the distances L ₁ and L 2 from both end pivot points P and Q of one link of the parallel link 8 to the elastic member 35 wound around each guide body 31 and ₃₂ are set to be substantially the same. Therefore, even if the float 7 moves up and down via the parallel link 8 and the earthen covering vessel 28 moves up and down accordingly, the length of the pressure member 35 between the guide bodies 31 and 32 remains approximately constant, and the parallel Link 8
Even if it is deformed, its length does not change, and the pressure member 35 can always apply a constant soil covering pressure to the earth covering vessel 28.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a side view of the main parts, FIG. 2 is a perspective view of the main parts, and FIG. 3 is a side view of the entire submerged direct seeding machine. 1... Mobile machine, 4... Submerged direct seeding machine, 5... Support frame, 6... Tool bar, 7... Float, 8...
Parallel link, 10...Bracket, 11...Strut, 28...Earth cover, 29...Support, 31,3
2...Pulley (guide body), 33...Wire, 34
... Spring, 35 ... Repression member.

Claims (1)

[Claims for Utility Model Registration] A bracket 10 fixed to the support frame 5 of the mobile device 1 and a support post 11 erected from the float 7 are connected by a parallel link 8, and a support body 29 with an earth coverr 28 attached is connected to the support frame 5 of the mobile device 1. In the soil covering device for a direct flooding machine, the soil covering device for a direct flooding machine is provided with a pressure member 35 that is pivotally supported to be vertically swingable on the support frame 5 and the support body 29 and applies soil covering pressure to the soil covering device 28. Guide bodies 31 and 32 around which the elastic member 35 is wound are provided on the support column 11, and the elastic member 35 is wound around each guide body 31 and 32 from the pivot points P and Q at both ends of one link of the parallel link 8. A soil covering device for a flooded direct seeding machine, characterized in that distances L ₁ and L ₂ are set to be substantially the same.