JPH025687Y2 - - Google Patents

Description

[Detailed explanation of the invention] (a) Industrial application field This invention is for sowing seeds in a field, and the sowing device is attached to a passenger vehicle so that it can be raised and lowered by a link, or a riding-type seeding machine with wheels. This invention relates to a walk-behind seeding machine that is directly connected to a seeding device.

(b) Conventional Example Conventionally, it is already known that a seeding machine that feeds out seeds in a hopper and sows seeds in a field has a plurality of grooves on the outer periphery of the feed roll and rotates the feed roll in conjunction with the vehicle speed. It is being

(c) Problems to be solved by the invention In the known feeding roll, when its rotational speed changed, the feeding amount also changed. That is, when the feed roll is rotated at a high speed, the amount of seeds flowing into the grooves of the feed roll is smaller than when the feed roll is rotated at a low speed, resulting in a reduction in the amount of seeds to be sown.

(d) Means for solving the problem The present invention is a seeding machine in which a roll having a concave portion and a cylindrical roll having a notch are slidably fitted to form a feed roll. It is made movable in the direction of the core, and a reciprocating device that operates according to the rotation speed is linked to this roll, so that when the engine rotation speed or vehicle speed changes, the rotation speed of the feeding roll changes accordingly. The reciprocating device moves one of the rolls that can move in the axial direction, thereby increasing the capacity of the groove of the feed roll at high speed rotation and decreasing it at low speed rotation, thereby increasing the capacity of the groove of the roll by a substantially constant amount regardless of the slow rotation speed of the roll. The above-mentioned problem was solved by making it possible to scrape out the seeds.

(e) Action When seeds are placed in the hopper and the machine is run while rotating the feed roll, the feed roll rotates with the seeds in the hopper in its groove, thereby intermittently feeding them out and sowing them in the field. .

During such seeding work, when the engine speed or vehicle speed changes, and as a result, the rotation speed or feed amount of the feed roll changes, the reciprocating device linked to this changes the reciprocating movement of one of the rolls in the direction of its axis. As a result, the seed storage space in the groove of the roll is expanded when the roll rotates at high speed (or when the amount of seeds sown per unit time is large), and is contracted when the roll is rotated at high speed (or when the amount of seeds sown per unit time is large), so that the seed storage space remains approximately constant regardless of the rotation speed, etc. Can be sown in small quantities.

(F) Embodiment An embodiment of the present invention is explained about a walk-behind flooded seeding machine shown in the drawings.
The machine body is equipped with wheels 3, 3 in the middle part, a center float 4 in the lower part, and a handle 5 in the rear part, and a seeding device 6 is attached to the rear thereof.

The seeding device 6 also includes a plurality of hoppers 8 having a discharge port 7 opening rearward at the bottom thereof, and a feed roll 11 slidably supported by a spline shaft 10 so as to overlap with the discharge port 7. The feed roll 11 has a plurality of side floats 12 at its lower part, and the feed roll 11 has a plurality of protrusions 13.
The cylindrical roll 13 having the small diameter portion 14a...
and a groove 14b into which the protrusion 13a is fitted, and a connecting rod 16 which is removably inserted into and removed from the reference roll 14, and which is pivotally connected to the receivers 15, 15 on the outside of the cylindrical roll 13. , 16 have elongated holes 17, 17 at their tips, and a boss 18 fixed to the spline shaft 10 with a bolt is connected to the connecting rods 16, 16 by pins 20 that loosely fit into the elongated holes 17, 17. A compression spring 21 is interposed between the boss 18 and the cylindrical roll 13 so that the cylindrical roll 13 can move within the range of the long holes 17, 17 against the compression spring 21 while being biased apart. A reciprocating device is constructed by connecting the weights 22, 22 to the boss 18 and the receivers 15, 15 by links 23, 23.

Further, the rear portion of the shift plate 25, whose front portion is loosely fitted into the circumferential groove on the side of the reference roll 14, is supported by bearings 26, 26.
An adjustment lever 3 is fixed with a screw 28 to an adjustment shaft 27 which is supported so as to be laterally movable, and is loosely fitted onto the adjustment shaft 27 with its position regulated by a stopper 30.
1 is inserted into a V-shaped guide groove 32 bored in the rear wall of the hopper 8, and a bent stopper 33 is welded to the boss of the hopper 8, and a winding spring 34 presses the adjustment lever 31 downward. The guide groove 32 is pressed against a stepped portion formed on the lower edge of the guide groove 32 by force.

When the above-mentioned seeding machine is run in a plowed field and the spline shaft 10 is driven by the engine 2 via the transmission case 35 etc., the feed roll 1
1 rotates counterclockwise in FIG. 3 to scoop up seeds such as rice seeds in the hopper 8 and discharge them at the rear, and the discharged seeds pass through the guide cylinder 36 and are formed by the groove plate 37 on the mud surface. The soil falls into the trench and is covered with soil by the soil covering plate 39.

When setting the seeding amount, the adjustment lever 31 is tilted up and down and moved laterally, and the reference roll 14 is moved laterally to expand and contract the distance between the cylindrical roll 13 and the ridges 13a, 13a. The length of the groove formed by the small diameter portion changes.

In addition, if the rotation speed of the spline shaft 10 changes due to a change in the rotation speed of the engine 2 during seeding work, the centrifugal force of the weights 22, 22 is small during low speed rotation, so the cylindrical roll 13 is moved by the compression spring 21. The weights 22 and 22 move to the right side as shown in Figure 5, shortening the length of the groove and pumping out a predetermined amount. As they are separated by the core force, the cylindrical roll 13 is pulled outward against the compression spring 21, and as a result, the groove into which the seeds flow becomes longer. Although the amount decreases, it is possible to dispense a predetermined amount.

Furthermore, when the adjustment lever 31 is set to the stop position directly below the guide groove 32, the stopper 3
3 prevents the cylindrical roll 13 from moving outward beyond the flange portion 13b of the cylindrical roll 13, as shown by the chain line in FIG.

Next, another embodiment of the reciprocating device will be explained with reference to FIGS. 7 to 10. In this embodiment, a solenoid 40 is used in place of the weight 22 operated by centrifugal force in the previous embodiment, and a solenoid 40 is installed on the side plate. The attached solenoid 40 is connected to a laterally movable control shaft 41, and the shift arm 45, which rotates on the control shaft 41 with its position restricted by seats 43, 43 and has a recess 45a at the lower front side, is a wound spring. 46, and the recess 45a fits into a circumferential groove 13c provided on the outside of the cylindrical roll 13.

Further, a sensor 47 for detecting the amount of falling seeds is attached to the guide tube 36, and in this embodiment, four sets of sowing sections are provided, and the four sensors 47 attached to each one are 7th, 9th, 10th, etc. As shown in FIG. 8, the detection value of each sensor 47 is The input is inputted to the control unit 50, and the control unit 50 reads the total delivery amount and causes a corresponding current to flow through the solenoid 40, so that the solenoid 4
0 is moved in the lateral direction of the control shaft 41 by an amount commensurate with the current, and since the control shaft 41 has a plurality of shift arms 45 corresponding to each cylindrical roll 13 . ...is compression spring 2
1... and the suction force of the solenoid 40 are balanced, and the amount of seed delivery becomes approximately constant.

During seeding work, if you want to stop part of the sowing along a ridge, etc., move the adjustment lever 31 to a position corresponding to the stop position within the vertical width of the guide groove 32. The tip of the lever (without a part) goes under the shift arm 45, and when you release your hand there, the adjustment lever 31 rotates downward and enters the stop position, and the stopper 33 moves under the shift arm 45.
5 is pushed upward to make the concave portion escape from the circumferential groove 13c.

At this time, the input from the sensor 47 to the control unit 50 is reduced by the number of stop points, but the number of cylindrical rolls 13 operated by the solenoid 40 is correspondingly reduced, so the amount of feed can be accurately controlled. .

11 and 12 show still another embodiment of the reciprocating device. In the first embodiment, the centrifugal force generated by the rotation of the spline shaft 10, which is the feeding shaft, is transferred to the links 23... In this embodiment, the spline shaft 10 is used directly through the spline shaft 10.
A rotation sensor 51 is attached to the rotation sensor 5.
1 is input to the control unit 50, and this control unit 5
0 and the solenoid 40, a resistor 52, which pairs with each of the switches 48, is inserted in parallel, and the solenoid 40 generates a suction force according to the detected value of the rotation sensor 51. When the control shaft 41 is reciprocated and part of the sowing is stopped, the corresponding stopper 3 is moved as in the second embodiment.
3 releases the shift arm 45 so that the associated compression spring 21 is no longer compressed, and at the same time the switch 48 is turned OFF, so that an appropriate amount of feed can be achieved.

In addition, in the above-mentioned embodiment, the cylindrical roll 13 was reciprocated to adjust the feed amount, but since both are supported by the spline shaft 10 so as to be able to move laterally, the cylindrical roll 13 is used as the reference roll. The present invention can also be implemented by moving the reference roll 14 laterally depending on the amount of feed.

(g) Effects of the invention As described above, the invention provides a seeding machine in which a roll having a recessed part and a cylindrical roll having a notch are slidably fitted to form the feed roll 11. Since the roll is movable in the axial direction and a reciprocating device that operates according to the number of rotations or the amount of feed is connected to this roll, the feed roll 11
If the number of revolutions per unit time or the amount of feeding increases, and it becomes difficult for the seeds to flow into the grooves of the feeding roll, the grooves become longer, and the number of rotations of the feeding roll decreases, making it difficult for the seeds to flow into the grooves. When the state changes to a state where it becomes easier, the groove of the feed roll becomes shorter, and as a result, even if the rotational speed of the feed roll changes, the amount of sowing can always and automatically be kept approximately constant.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention,
Figure 1 is a side view of the walk-behind seeding machine, Figure 2 is a rear view of the same as above, Figure 3 is a vertical side view of the main parts, Figure 4 is a rear view of the lever guide, Figures 5 and 6 are 7 to 10 show other embodiments; FIG. 7 is a longitudinal side view of the main parts; FIG. 8 is a circuit diagram; FIG. 9 is a rear view of the lever guide section; FIG. 10 is a longitudinal sectional plan view of the main part, FIGS. 11 and 12 show still another embodiment, FIG. 11 is a longitudinal sectional plan view of the main part, and FIG. 12 is a circuit diagram. 6... Seeding device, 10... Spline shaft, 11
... Feeding roll, 13 ... Cylindrical roll, 14 ...
Reference roll, 22... Weight, 40... Solenoid, 47... Sensor, 51... Rotation sensor.

Claims (1)

[Scope of utility model registration request] In a seeding machine configured by slidingly fitting a cylindrical roll having a cutout to a roll having a recess to form a feed roll 11, at least one of the rolls is made movable in the axial direction, and this roll A sowing machine characterized in that a reciprocating device that operates according to the number of rotations or the amount of feed is connected to the sowing machine.