JPS6361884B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a seedling seeding sowing machine that is capable of reliably sowing a predetermined amount of seeds only on bed soil.

For example, a seeding machine installed in a seedling seeding device receives seeds sent out from a feeding roll at the bottom of a seed hopper with a seeding roll that has many feeding grooves on the outer periphery. It is configured to rotate until the seedling box rotates until the seeds are sown on the bed soil inside the seedling nursery box.

In this conventional seeding machine, the sowing roll is driven by the same drive source that transports the seedling boxes, and the seedling boxes are continuously rotated from above the seedling boxes that are continuously sent by the seedling box transfer mechanism. Since the seeds fall from the seeding roll, they may fall between the seedling boxes, or may be sown against the wall instead of being sown in the correct position inside the seedling box. As a result, seedlings may become crowded or lose foliage.

In addition, the amount of seeds to be sown in the seedling box is approximately 32 rows for adult seedlings.
It is specified that the number of seedlings for medium-sized seedlings is approximately 40, and for young seedlings is approximately 56, but it is difficult to change the speed with conventional seeding machines, so it is recommended to prepare one set for each seeding rate. I didn't have to.

The present invention solves these problems with the conventional device, allows seeds to be sown correctly in the correct position in the seedling nursery box, and can be easily changed to various uses for adult seedlings, medium seedlings, and young seedlings. The purpose of the present invention is to provide a seeder for raising seedlings.

To achieve this object, the present invention is characterized by a seedling box transport mechanism that transports the seedling box at a constant speed, and a seedling box transport mechanism that has a plurality of seed feeding grooves on the outer periphery so that the seedling box can be rotated while being rotated. There is a sowing roll that sows seeds on the soil at regular intervals, a detection mechanism that detects the tip of the seedling box that is transferred below the sowing roll, and the operation of this detection mechanism uses the power from the drive source. and a drive mechanism that transmits transmission to the sowing roll, and the drive mechanism rotates the sowing roll under the sowing roll only while the seedling box moves from the sowing start position to the sowing end position using the power from the drive source. A timing part that cuts off the power transmission from the drive source to the seeding roll after the rotation, and a timing part that transmits the power from the drive source to the seeding roll for a limited time and can change the rotation speed of this seeding roll. The present invention is characterized in that it has a transmission section.

Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, a seedling-raising seeding machine 1 is placed on a support frame 4 that supports a transfer mechanism 3 of a seedling-raising box 2, and a bed of soil (not shown) is placed on the support frame 4. Together with a soil supply machine, irrigation machine, and soil leveling machine, it constitutes a series of seeding equipment for raising seedlings.

The seedling box transfer mechanism 3 can be switched forward and reverse to move back and forth while placing the seedling box 2 thereon. A plurality of rotating shafts 17 are pivotally supported at intervals in the longitudinal direction, and the rotating shaft 1
7 and a sprocket 15 that transmits power from the motor section 13 to the full rotating shaft 17.
and chain 16, etc. These sprocket 15, chain 16, etc. are housed in a groove in one frame 11 having a U-shaped cross section. Power can be transmitted to one of the rotating shafts 17 from the motor section 13 via a chain transmission means 18.

The transfer mechanism 3 is of a roller conveyor type in order to perform normal forward and reverse rotation, and is configured to drive all rollers 14, but is configured to drive only one roller by wrapping a belt around it. Also good.

1 to 5, the seeding machine 1 includes an outer frame 26 fixed to the frame 11, an inner frame 27 disposed within the outer frame 26 so as to be movable up and down, and an inner frame 27 disposed on the outer frame 26. An upper frame 30 supporting the seed hopper 28 and the feeding roll 29, a sowing roll 31 supported by the inner frame 27, a rotating brush 32, and a surplus paddy discharge body 33, the sowing roll 31, the rotating brush 32,
A drive mechanism 34 for driving the surplus paddy discharge body 33 and the delivery roll 29 is provided. Said outer frame 2
6 is formed by two side plates, and the front, rear, top and bottom are open.

The seeding machine 1 is operated when the seedling box 2 is transferred in the direction of the arrow B. Therefore, when supplying soil and watering, the seedling box 2 is transferred in the direction of the arrow A, so the inner frame 27 is moved upward. Then, the sowing roll 31, rotating brush 32, and surplus paddy discharge body 33 are evacuated upward. The pivot point of the inner frame 27 is a support shaft 35 supported by the outer frame 26.

As shown in FIG. 2, the seeding roll 31 has a number of feeding grooves 65 formed at equal intervals on its outer periphery.
Together with the guide plate 66, the seeds C falling in a substantially fixed amount from the feed roll 29 are stored in the feed groove 65 while accumulating the seeds C.

Each feeding groove 65 is provided inside this seeding roll 31.
A plunger 67 is provided so as to be slidable in the radial direction, and the seeds C are prevented from falling to the lowest position by an arcuate regulating plate 68.
is pushed out as it naturally falls at the lowest position and placed in seedling raising box 2.
Sow inside.

In the present invention, the seeding roll 31 is simply a concave feeding groove 65 without the plunger 67.
It is also possible to have the following.

The drive mechanism 34 includes a synchronous drive mechanism 34a that synchronously rotates various rolls in the seeding machine 1, and a drive source 7.
a timing drive mechanism 34b that transmits the power of 0 to the synchronous drive mechanism 34a in conjunction with the transfer of the seedling box 2;
and has.

Synchronous drive mechanism 34a shown in FIGS. 2 and 3
In this case, sprockets 37, 38, 3 are attached to the support shaft 35 and one end of each shaft of the sowing roll 31, the rotating brush 32, and the surplus paddy discharge body 33 (on the right side in FIG. 3).
9 and 40 are provided, a chain 41 is wound around these, and tension is applied to the chain 41 by a tension sprocket 42. The seeding roll 31, rotating brush 32, and surplus paddy discharge body 33 are synchronously driven by the driving force from the sprocket 37.

A gear 44 is provided at the end of the support shaft 35 that protrudes to the outside of the outer frame 26 (on the left side in FIG.
It meshes with a gear 45 provided at 3. A sprocket 52 is provided on the rotating shaft 43, and a sprocket 54 provided on the shaft 53 of the feeding roll 29
A chain 55 is wound between.

The chain 55 is also wound around a pulley 59 (or a sprocket) on a support shaft 58 fixedly supported on the upper surface of the outer frame 26 via a bracket 57, and the tension lever provided on the support shaft 58 Tension is applied by 60.

The upper frame 30 is rotatable about a support shaft 58, and is rotated in the clockwise direction in FIG. 2 to remove seeds from the seed hopper 28 and repair and inspect the interior of the lower frame 26.

Timing drive mechanism 3 shown in FIGS. 3 to 5
4b, it has a timing part 71 and a transmission part 72 arranged outside the outer frame 26, the drive source 70 thereof is a motor arranged inside the outer frame 26, and the outer frame 26 and the frame 11.
It operates with the cooperation of a rotation mechanism 73 provided in the.

In the detection mechanism 73, a detection switch 74 that operates the drive source 70 is fixed to the outer frame 26 (or the frame 11), and its operating piece 75 is rotated by an operating lever 76 to operate the switch 74.
Turn on/off.

The actuating lever 76 is fixed to the end of a shaft 77 that is rotatably supported by the frame 11 around a horizontal axis, and a contact piece 78 that can come into contact with the seedling box 2 being transferred is provided midway through the shaft 77. is provided.

The shaft 77 is located almost directly below the seeding roll 31, and when the tip 2a of the seedling raising box 2 is moved below the seeding roll 31, the contact piece 78 comes into contact with the tip 2a, as shown in FIG. As shown, contact piece 7
8. The shaft 77 and the actuation lever 76 are rotated together to allow the downward rotation of the actuating piece 75, which is pressed downward, and the detection switch 74 is turned from the OFF state.
Turn it on and send an activation signal to the drive source 70.

The timing section 71 includes a pinion 81 fixed to the motor shaft 80 and a support shaft 8 supported by the outer frame 26.
The timing gear 83 is rotatably provided on the timing gear 2 and meshes with the pinion 81, and a switch 85 is operated by a contact piece 84 provided on the timing gear 83. Reference numeral 86 denotes an operating piece of the switch 85 which is moved up and down by the contact piece 84.

The switch 85 is used to stop the operation of the drive source 70, and when the timing gear 83 rotates once, the timing drive mechanism 34b is stopped.

The transmission section 72 includes a first gear 88 provided on the support shaft 35 and a second gear 90 provided on a rotating shaft 89 rotatably supported by the outer frame 26 and meshing with the first gear 88. The rotary shaft 8 is connected from the motor shaft 80 via a chain transmission means 91.
Power can be transmitted to 9.

The chain transmission means 91 includes a sprocket 92 fixed to the motor shaft 80, a sprocket 93 fixed to the rotating shaft 89, and a tension sprocket 94.
and a chain 95 that is wound around all sprockets 92, 93, and 94, and the tension sprocket 94 is supported by a bracket 96 that is fixed to the outer frame 26 so that its position can be adjusted slightly, and the tension of the chain 95 can be adjusted. It is possible.

A plurality of sets of gears 88 and 90 with different numbers of teeth are prepared in the transmission section 72 and can be replaced. By replacing the gears, the power of the rotating shaft 89 can be changed to a rotational speed. The power of the drive source 70 can be transmitted to the support shaft 35, and the power of the drive source 70 can be transmitted to the synchronous drive mechanism 34a.

97 is an outer cover of the timing drive mechanism 34b;
Reference numeral 98 designates switch boxes for operating the drive mechanism 34, respectively.

Next, the seeding operation in the seeding machine 1 of the present invention will be explained.

1 to 6, eight feeding grooves 65 are formed in the seeding roll 31, and a pinion 81 of a timing section 71 and a timing gear 83 are formed in the seeding roll 31.
The tooth ratio is 1:4, and the gears 88 and 90 of the transmission section 72
The ratio of the number of teeth is 1 to 1, and the circumferential length of the seeding roll 31 is approximately 4 times the length L inside the seedling raising box 2.
When the pinion 81 rotates four times, the timing gear 83 rotates once, and the gears 88, 90 and the seeding roll 31 rotate four times. Therefore, the seeding roll 31 sows 32 rows of seeds C. and is set for adult seedlings.

The seedling box transfer mechanism 3 is operated via the motor section 13, and the seedling box 2 after the bed soil D has been supplied is placed thereon, and the seedling box 2 is placed in the direction indicated by the arrow B.
When the tip 2a is transferred to the seeding roll 3
1, the contact piece 78 is rotated by the seedling raising box 2, and the detection switch 74 is activated.

The drive source 70 is activated by the operation of the switch 74, and rotates the timing gear 83, and also rotates the chain transmission means 91, the transmission section 72, and the chain 41.
The sowing roll 31, the feeding roll 2, etc.
9. The rotating brush 32, surplus paddy discharge body 33, etc. are driven synchronously.

The sowing start position α where the sowing roll 31 rotates and the seeds C fall from the feeding groove 65 is a point a distance l backward from the tip 2a of the seedling raising box 2, for example, a point 1/64 of the length L. Yes, and the position of the detection switch 74 is set so that it does.

When the timing gear 83 rotates once and the contact piece 84 returns to its original position, that is, the position where the switch 85 is activated, the operation of the drive source 70 is stopped by the operation of the switch 85, and the seeding roll 31 In the meantime, cut off the power transmission to the seeding roll 31.
is rotated four times to sow 32 rows of seeds C on bed soil D at regular intervals of 2 liters. The distance 2l is 1/32 of the length L. The sowing end position β is the rear end 2b of the seedling raising box 2.
A point that is a distance l forward from the point, that is, a length L minus a distance l.

Even after sowing, the seedling raising box 2 continues to be transferred and supplied to a soil covering machine, etc., and in the seeding machine 1, the contact piece 78 is placed in the fourth position.
It returns to the original state shown by the imaginary line in the figure, and prepares for the detection of the next seedling raising box 2 to be transferred.

Next, when sowing medium-sized seedlings, the transmission section 72
The tooth ratio of gear 88 to gear 90 is replaced with a gear with a ratio of 5 to 4, and the sowing roll 31 is rotated 5 times while the timing gear 83 rotates once, and the sowing roll 31 is rotated 5 times to spread the seeds onto the bed soil D.
Sow 40 rows. The seeding interval of 2l is 40mm of the length L.
The positions α and β are located away from the front end 2a and rear end 2b of the seedling box 2, respectively.

Similarly, when sowing seeds for young seedlings, the ratio of gears 88 to 90 in the transmission section 72 is replaced with gears with a ratio of 7 to 4, and the timing gear 83 is changed to 1.
During rotation, the seeding roll 31 is rotated seven times to sow 56 rows.

It should be noted that the present invention is not limited to the above embodiments, and the ratio of the number of teeth between the pinion 81 and the timing gear 83, the number of contact pieces 84, and the seeding roll 3
The circumferential length of 1, the number of feeding grooves 65, etc. can be selected as appropriate, and the number of rows for adult seedlings, middle seedlings, and young seedlings is not strict, and there is an allowable range of 2 to 3 rows.

Further, as the drive source 70, one motor independent from the motor section 13 is used, but the motor section 1
3 may be transmitted to the drive mechanism 34 via an electromagnetic clutch, in which case the electromagnetic clutch is actuated and stopped by switches 74 and 85,
The drive mechanism 34 is stopped in isolation from the operation of the transfer mechanism 3.

Although limit switches are used as the switches 74 and 85, other contact switches or non-contact switches may be used.

According to the present invention detailed above, the seeding roll 31
Since the drive source 70 that transmits power to the drive mechanism 34 can be operated and stopped independently of the seedling box transfer mechanism 3, accurate seeding can be started in the seedling box 2 whose tip 2a is detected by the detection mechanism 73. Seeds can be sown from position α, and the timing unit 71 is set so that the sowing roll 31 rotates only while the seedling raising box 2 moves below the sowing roll 31 from the sowing start position α to the sowing end position β. Therefore, the sowing end position β can be set accurately, and the seed C
The seedlings are not placed on the upper edge of the seedling raising box 2 or are sown at the front end 2a and the rear end 2b, so that crowding of seedlings and lack of plants can be reliably prevented. Since the rotation speed of the seeding roll 31 can be changed within the time set by the timing unit 71, one seeding machine 1 can sow seeds for adult seedlings, medium seedlings, young seedlings, etc. can do.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is an overall front view, FIG. 2 is a sectional front view, FIG. 3 is a sectional side view, FIG. 4 is a front view showing a timing drive mechanism, and FIG. The figure is a sectional view taken along the line V-V in FIG. 4, and FIG. 6 is a sectional view of the seedling nursery box showing the sowing position. DESCRIPTION OF SYMBOLS 1... Seeding machine for seedling raising, 2... Seedling growing box, 3... Seedling growing box transfer mechanism, 29... Feeding roll, 31... Seeding roll, 34... Drive mechanism, 34a... Synchronous drive mechanism, 34b... Timing drive mechanism, 65...
...Feeding groove, 70... Drive source, 71... Timing section, 72... Transmission section, 73... Detection mechanism, α...
...Seeding start position, β...Seeding end position.

Claims (1)

[Claims] 1 A seedling raising box transport mechanism 3 that transports the seedling raising box 2 at a constant speed and a plurality of seed feeding grooves 65 on the outer periphery are provided, and the seeds C are placed at regular intervals on the bed soil D in the seedling raising box 2 while rotating. A seeding roll 31 for sowing seeds and a seedling raising box 2 transported below this sowing roll 31
, and a drive mechanism 34 that transmits power from the drive source 70 to the seeding roll 31 by the operation of the detection mechanism 73, and the drive mechanism 34 is connected to the drive source. The seeding roll 31 is moved downward by the power from 70 to the seedling growing box 2.
rotates only while moving from the sowing start position α to the sowing end position β, and after that rotation, the drive source 70
A timing section 71 that interrupts power transmission from the drive source 70 to the sowing roll 31, and a timing section 71 that transmits time-limited power from the drive source 70 to the sowing roll 31 and changing the rotational speed of the sowing roll 31. A seedling-raising seeding machine characterized by having a variable speed section 72.