JPH0525377Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The present invention relates to a transplanter that transplants seedlings grown in a nursery to a main field, and in particular removes defective seedlings from the seedlings supplied to the transplanter. The present invention relates to a seedling supply device that supplies seedlings to a planting section by controlling the conveyance speed of rows of seedlings arranged at regular intervals and arranging them at regular intervals.

Conventional technology The seedling feeding device of this type of conventional transplanter is as follows:
Utility Model No. 63-71611 “Seedling selection and feeding device for transplanter”
As shown in , there is a constant-speed seedling feeding device that feeds seedlings to the planting section at a seedling conveying speed that corresponds to the traveling speed of the transplanter. There is a variable speed seedling feeding device that supplies the seedlings, and in the constant speed seedling feeding device, a plurality of string belts are used to first receive the seedlings from the variable speed seedling feeding device. The material that is transferred is multiple string-like belts, and the multiple string-like belts of the variable-speed seedling feeder and the multiple string-like belts of the constant-speed seedling feeder are connected to pulleys fitted on the same shaft. What is being passed over is known.

This seedling feeding device is equipped with a photoelectric switch on the multiple string-like belts of the variable speed seedling feeding device.
When the photoelectric switch detects a gap between the seedling rows, the speed of the variable-speed seedling feeding device is increased, removing the missing seedlings and arranging the irregularly spaced seedling rows at regular intervals, and switching on the constant-speed seedling feeding device. It is intended to supply seedlings to the planting area by passing them on a string-like belt.

Further, above the rear part of the string-like belt of the constant-speed seedling feeding device, a sponge roller is provided for feeding out the seedlings to the next seedling conveying mechanism.

Problems to be Solved by the Invention In the seedling feeding device of a transplanter such as the conventional technique described above, the transfer of seedlings from the variable speed seedling feeding device to the constant speed seedling feeding device is carried out on a plurality of string-like belts. It is carried out horizontally from the top to the top of multiple string-like belts. For onion seedlings in which the leaf part is longer than the paper cylinder part, if only the paper cylinder part is placed on a belt and transported horizontally, the weight of the leaf part will prevent it from being transported normally. The paper tube and the leaf must be carried together to prevent the paper from falling off the belt. As a result, there were cases in which the tips of the leaves of the seedlings became entangled with the pulleys of the string-like belt, and the seedlings were not transported normally.

In addition, a leaf tip guide device may be installed on the pulley to prevent the leaf tips from getting tangled, but the string-like belt of the constant speed seedling feeding device is short enough to prevent the leaf tips from getting tangled. In order to provide a guiding device to prevent this, the belt has become longer and the sorting and alignment device has become larger.

Simply replacing the string-like belt with a cylindrical roller can prevent the tips of the leaves from getting entangled, but this will make it difficult to transfer the seedlings smoothly.

In addition, on the string-like belt of the constant-speed seedling feeding device,
The variable speed seedling supply device delivers seedlings at increased speed every time there is a gap in the seedling row, and the seedlings collide with each other and swell upward, which may result in the seedling rows not being at regular intervals.

SUMMARY OF THE INVENTION Therefore, the present invention provides a seedling feeding device for a transplanter that prevents entanglement of leaf tips, occupies a small space, allows smooth transfer of seedlings, and prevents seedlings from rising on the constant speed seedling feeding device. With the goal.

Means for Solving the Problems The configuration of the present invention for achieving the above object will be explained using FIGS. 1 and 2 corresponding to embodiments.

In this invention, at a seedling transport speed corresponding to the traveling speed of the transplanter, the leaf part Pb is lower than the length of the paper tube part Pa at the planting part.
Constant speed seedling supply device 10 that supplies long seedlings P
means that there is.

In addition to the constant speed seedling supply device 10, there is a variable speed seedling supply device 20 that loads and feeds the seedlings P in the horizontal direction while changing the seedling conveyance speed.

In the constant speed seedling supply device 10, the plurality of grooves 1 receive the seedlings P from the variable speed seedling supply device 20 first.
2, and the roller 11
A means of placing the paper tube part Pa and leaf part Pb of the seedling P on top of the seedling P.

In the variable speed seedling supply device 20, the plurality of belts 21, 26, 30 are used to place and deliver the seedlings P to the constant speed seedling supply device 10, and the plurality of belts 2
Paper tube part Pa and leaf part Pb of seedling P on top of 1, 26, 30
The means of posting.

Multiple belts 21, 2 of variable speed seedling supply device 20
6 and 30 are bitten into the groove 12 of the roller 11 of the constant-speed seedling feeding device 10.

The constant speed seedling supply device 10 includes an elastic roller 1 that contacts the seedling P from above and rotates in the opposite direction to the roller 11 immediately after the seedling P is transferred onto the roller 11.
4 is provided.

The above-mentioned means are intended to solve the problem.

Effect Next, the operation of the present invention will be explained.

In the constant speed seedling supply device 10, the roller 11 first receives the leaf part Pb of the seedling P from the variable speed seedling supply device 20, and the seedling P is placed on the roller 11.
Since the constant speed seedling feeding device 10 does not use a string-like belt, the leaf tips Pc of the seedlings P do not become entangled with the pulley.

Moreover, the roller 11 with a plurality of grooves 12 is used to first receive the seedlings P from the variable speed seedling supply device 20, and the plurality of belts 21 of the variable speed seedling supply device 20,
Since the terminal ends of the rollers 26 and 30 are inserted into the grooves 12 of the roller 11, the space occupied by this device is reduced.

Further, the paper tube part Pa and the leaf part Pb of the seedling P are placed on the roller 11 of the constant speed seedling feeding device 10, and the paper tube part Pa and the leaf part Pb of the seedling P are placed on the plurality of belts 21, 26, 30 of the variable speed seedling feeding device 20. Since the cylindrical part Pa and the leaf part Pb are mounted, and the terminal ends of the plurality of belts 21, 26, and 30 are bitten into the groove part 12 of the roller 11, the difference in level is small at this delivery part and the paper cylindrical part Pa of the seedling P is placed on the paper cylindrical part Pa. Since the leaf part Pb does not fall, the transfer of the seedlings P is also smooth.

Moreover, since an elastic roller 14 is provided on the roller 11, which contacts the seedling P from above and rotates in the opposite direction to the roller 11 immediately after the seedling P is transferred.
Even if the seedlings P delivered onto this roller 11 collide, they will not swell.

Embodiment An embodiment shown in FIGS. 1 and 2 will be described below.

The seedlings P supplied to the transplanter are onion seedlings, which are grown in a paper tube seedling container with a length of about 4 cm and a diameter of about 2 cm, filled with soil, and the leaf part at the time of transplanting.
The length of Pb is about ten centimeters.

A seedling supply device is provided on the side of a machine frame 1 containing a drive means for conveying inverted rows of seedlings and supplying the seedlings P to a planting section.

The seedling supply device includes a constant speed seedling supply device 10 that supplies seedlings P to the planting section at a seedling conveyance speed determined at a predetermined ratio corresponding to a change in the traveling speed of the transplanter so that the seedlings are planted every time the transplanter advances a predetermined distance. and a variable-speed seedling supply device 20 that supplies seedlings P while changing the seedling conveyance speed to the constant-speed seedling supply device 10.

The variable speed seedling supply device 20 includes a conveyor belt 39, presser rollers 35, 37, a leaf receiving belt 21, a leaf presser belt 42, string belts 26, 30, and the like.

The constant speed seedling supply device 10 includes a roller 11, an elastic roller 14, a vertical conveyance belt 16, and the like.

The conveyor belt 39 is a belt with a width longer than the entire length of the seedlings P, and is stretched between a pulley 40 fitted on a shaft 41 protruding from the machine frame 1 and a pulley (not shown), and is placed upside down in a row on the upper surface of the belt. It rotates so as to convey the supplied seedlings P to the left in the figure.

Above and in front of the pulley 40, which is the end of the conveyor belt 39 for conveying the seedlings, there is a cylindrical presser roller made of a sponge-like material at a position corresponding to the paper cylinder part Pa of the seedlings P and at a height that does not normally come into contact with the seedlings P. 37 is fitted onto a shaft 38 protruding from the machine frame 1.
Then, the outer circumferential speed is approximately the same as the seedling conveying speed of the conveyor belt 39, and the seedling P is rotated so as to be delivered to the left in the figure.

At the lower front of the pulley 40 of the conveyor belt 39, there is a receiving roller 34a that is slightly longer than the length of the paper tube part Pa for receiving the paper tube part Pa of the seedling P, and a receiving roller that receives the leaf part Pb of the seedling P that is shorter than the receiving roller 34a. 34b is fitted into the shaft 25 protruding from the machine frame 1. Then, the outer circumferential speed is approximately the same as the seedling conveying speed of the conveyor belt 39, and the seedling P is rotated so as to be delivered to the left in the figure.

A cylindrical presser roller 35 made of a sponge material is provided above and in front of the receiving roller 34a at a position corresponding to the paper cylinder part Pa of the seedling P by fitting it into a shaft 36 protruding from the machine frame 1. The outer circumferential speed is approximately the same as the seedling conveying speed of the conveyor belt 39, and the paper tube portion Pa of the seedling P is held between the presser roller 35 and the receiving roller 34a, and the seedling P is fed out to the left in the figure. Rotate it.

In front of and below the receiving roller 34a and substantially below the presser roller 35, there are cylindrical separating rollers 33 made of a sponge-like material at positions corresponding to the lower part and upper part of the paper tube part Pa of the seedling P, respectively.
a and 33b are fitted onto a shaft 29 protruding from the machine frame 1. The outer circumferential speed of these rollers is set higher than that of the receiving roller 34a and the presser roller 35,
The paper tube part Pa of the seedling P is sandwiched between the separating rollers 33a, 33b and the presser roller 35, and the seedling P is rotated to the left in the drawing so as to be fed out. , the pinched seedlings P are separated from the seedlings P held between the presser roller 35 and the receiving roller 34a.

Two leaf receiving belts 21 for receiving leaves Pb of the seedlings P are provided between the receiving roller 34a and the receiving roller 34b and outside the receiving roller 34b from below the front of the pulley 40 of the conveyor belt 39. . This leaf receiving belt 21 is stretched between a pulley 24 fitted on the shaft 25 and a pulley 22 fitted on a shaft 23 protruding from the machine frame 1 in front of the shaft 25. and,
The leaves Pb of the seedlings P delivered to the upper surface are rotated so as to be conveyed slightly downward to the left in the figure, and the conveyance speed is faster than the conveyor belt 39 and lower than the outer circumferential speed of the separation rollers 33a and 33b. Slow down.

A string belt 2 extends forward from between the separating rollers 33a and 33b and receives the upper part of the paper tube part Pa of the seedling P.
6 is provided so as to span between a pulley 28 fitted into the shaft 29 and a pulley 27 fitted into the shaft 23. Then, the paper tube part Pa of the seedling P transferred to the upper surface is rotated so as to be conveyed to the left in the figure, and the conveyance speed is approximately the same as that of the leaf receiving belt 21.

A shaft 51 protruding from the machine frame 1 is provided approximately midway between the shaft 29 and the shaft 23 and slightly lower than those shafts, and a pulley 3 fitted into the shaft 51 is provided.
2 and a pulley 31 fitted into the shaft 23, a string belt 30 is provided to receive the lower part of the paper tube part Pa of the seedling P. Then, the paper tube part Pa of the seedling P transferred to the upper surface is rotated so as to be conveyed while rising slightly to the left in the figure, and the conveyance speed is approximately the same as that of the string belt 26.

Among the two leaf receiving belts 21, the string belt 26
A leaf holding belt 42 having a sponge material attached to the outer periphery is provided above the middle part of the side leaf receiving belt 21. This leaf holding belt 42 consists of three shafts 46, 47 that protrude from a machine frame (not shown) that is separate from the machine frame 1.
Three pulleys 43, 44 fitted in 48,
It spans between 45 and 45. The shaft 47 is the shaft 2
9, the shaft 46 is located above and in front of the shaft 51, and the shaft 48 is located above and in front of the shaft 46.
A leaf presser belt 42 between the shaft 47 and the shaft 46
The lower surface of the leaf receiving belt 21 is brought into contact with the upper surface of the leaf receiving belt 21 at the same speed, and the seedling part Pb of the seedling P is held therebetween and rotated so as to be conveyed slightly downward to the left in the figure.

A photoelectric switch 49 is provided approximately midway between the shaft 51 and the shaft 23 and above the string belts 26, 30. The photoelectric switch 49 is a reflective type, and its optical axis 5
0 is directed downward and between the two string belts 26, 30, and the presence or absence of the paper tube part Pa of the seedling P being conveyed on the string belts 26, 30 is detected.

Then, based on the signal from the photoelectric switch 49 indicating the presence or absence of the paper cylinder part Pa, an electromagnetic clutch is operated via the electronic control circuit, and when there is no paper cylinder part Pa, the speed of the variable-speed seedling feeding device 20 is increased. When there is a paper cylinder part Pa, the speed of the variable speed seedling supply device 20 is reduced.

A shaft 13 protruding from the machine frame 1 at the same height as the shaft 23 is provided in front of the shaft 23, and a cylindrical roller 11 longer than the entire length of the seedling P is fitted into the shaft 13. The roller 11 is provided with a groove 12 at a position corresponding to the two leaf receiving belts 21 and the two string belts 26, 30, and the grooves 12 are wound around pulleys 22, 27, 31 fitted on a shaft 23. The leaf receiving belt 21 and the end portions of the string belts 26 and 30 are made to bite into each other.

A cylindrical elastic roller 14 made of a sponge material as an elastic body is fitted onto a shaft 15 protruding from the machine frame 1 at a position corresponding to the paper cylinder part Pa of the seedling P slightly in front of the roller 11. The outer circumferential speed is approximately the same as the seedling conveyance speed of the roller 11, and the paper tube portion Pa of the seedling P is sandwiched between the elastic roller 14 and the roller 11, and the rotation is made so as to feed out the seedling P in the left direction in the figure. let

A shaft 19 protruding from the machine frame 1 is provided in front and slightly above the roller 11, and the paper cylinder portion of the seedling P on the shaft 19 is provided.
Fit the pulley 18 in the position corresponding to Pa,
A vertical conveyor belt 16 having a large number of elastic protrusions 17 on its surface is provided to be stretched between this pulley 18 and a pulley (not shown) provided below the pulley 18. The outer circumferential speed of the vertical conveyance belt 16 is made faster than the rollers 11 and the elastic rollers 14, and the paper cylinder part Pa of the seedlings P that is fed out while being sandwiched between the elastic rollers 14 and the rollers 11 is moved downward in the figure. The paper cylinder part Pa of the seedling P is held between the protrusion 17 and the roller 11, and the seedling P is rotated to the left in the figure so as to be fed out.
6 separates the pinched seedlings P from the seedlings P pinched between the elastic roller 14 and the roller 11.

Next, the operation will be explained.

The seedlings P grown in the seedbed are transported to the field by appropriate means, placed on a transplanter, and supplied upside down in rows on the conveyor belt 39 by appropriate means.

As the transplanter advances, the conveyor belt 39 rotates and conveys the seedling P in the direction of the presser roller 37, and the paper cylinder part Pa of the seedling P is sandwiched between the presser roller 35 and the receiving roller 34a, and then separated. roller 33
The paper tube part Pa of the seedling P is separated by a and 33b.

During this time, the leaf part Pb of the seedling P is transferred to the conveyor belt 3.
9 to the upper surface of the leaf receiving belt 21, and at the same time as the paper cylinder part Pa is separated, the leaf holding belt 42 starts to pinch the leaf part Pb of the seedling P and start conveying it.

Next, the paper tube part Pa of the seedling P is passed onto the string belt 26, and the string belt 26 receives the upper part of the paper tube part Pa.
The leaf holding belt 42 is conveyed while holding the leaf portion Pb.

However, if the leaf part Pb of the seedling P is missing or is very small, the leaf part Pb is not held by the leaf presser belt 42, so the string belt 26 only supports the upper part of the paper tube part Pa. Therefore, due to the weight of the paper cylinder part Pa, it falls from above the string belt 26 and is removed from the system.

Next, the paper tube part Pa of the seedling P is also passed onto the string belt 30, the string belt 26 receives the upper part of the paper tube part Pa, the string belt 30 receives the lower part of the paper cylinder part Pa, and the leaf presser belt 42 is conveyed while holding the leaf part Pb between them.

Next, the leaf holding belt 42 separates from the leaf part Pb of the seedling P, the string belt 26 receives the upper part of the paper tube part Pa, the string belt 30 receives the lower part of the paper cylinder part Pa, and the leaf receiver belt 21 receives the leaf part Pb. It is transported with

The above is called the variable speed seedling feeding device 20, and the paper cylinder portion of the photoelectric switch 49 above the string belts 26, 30
By detecting the presence or absence of Pa, if there is no paper cylinder part Pa, the entire variable speed seedling supply device 20 is accelerated and rotates quickly, and if there is a paper cylinder part Pa, the entire variable speed seedling supply device 20 is decelerated. It has been rotated slowly. In other words, when there is a gap between the paper cylinder parts Pa, the speed of the entire seedling supply device 20 is increased, and the next constant-speed seedling supply device 1
Passed to 0.

Roller 1 illustrated as constant speed seedling feeding device 10
1, an elastic roller 14, and a vertical conveyance belt 16 supply the seedlings P to the planting section at a seedling conveyance speed corresponding to the running speed of the transplanter. The roller 11 through which the section Pa and the leaf section Pb are transferred is conveyed with the paper tube section Pa placed on its base and the leaf section Pb placed on its tip.

Immediately after the seedling P is transferred to the roller 11, the elastic roller 14 contacts the paper tube portion Pa of the seedling P from above, and the paper tube portion Pa of the seedling P transferred from the string belts 26 and 30 to the roller 11 is brought into contact with the elastic roller 14 from above. Even if a succeeding seedling P collides with the seedling P, the elastic roller 14 prevents the seedling from rising. Then, the paper cylinder part Pa of the seedling P is held between the elastic roller 14 and the roller 11 and let out, and the leaf part Pb of the seedling P is let out by the tip of the roller 11.

Next, the vertical conveyance belt 16 conveys the seedling P downward and supplies it to the planting section, where it is planted in the main field.

In this embodiment, the seedlings P are paper tube seedlings, but other seedlings with soil may also be used.

Further, although an example has been shown in which the presence or absence of the paper tube portion Pa of the seedling P is detected and the seedling conveyance speed of the variable speed seedling supply device 20 is changed, this may be any portion from which a signal necessary for control can be obtained.

Further, although an example has been shown in which the presence or absence of the paper tube part Pa of the seedling P is detected by the photoelectric switch 49, other sensors may be used.

Effects of the invention Since the present invention has the above configuration, in the constant speed seedling supply device 10, the roller 11 is the one that first receives the leaf part Pb of the seedling P from the variable speed seedling supply device 20, and the roller 11 is The paper tube part Pa and the leaf part Pb of the seedling P are placed on it, and the constant speed seedling feeding device 10
Since a string-like belt is not used in the leaf tip,
Since Pc does not get tangled, the seedlings P are transported normally without getting tangled.

Moreover, the roller 11 with a plurality of grooves 12 is used to first receive the seedlings P from the variable speed seedling supply device 20, and the plurality of belts 21 of the variable speed seedling supply device 20,
By making the terminal ends of the rollers 26 and 30 bite into the grooves 12 of the rollers 11, the space occupied by this device is reduced, so that a compact sorting and alignment device can be achieved.

Further, the paper tube part Pa and the leaf part Pb of the seedling P are placed on the roller 11 of the constant speed seedling feeding device 10, and the paper tube part Pa and the leaf part Pb of the seedling P are placed on the plurality of belts 21, 26, 30 of the variable speed seedling feeding device 20. By placing the cylinder part Pa and the leaf part Pb so that the terminal ends of the plurality of belts 21, 26, and 30 bite into the groove part 12 of the roller 11, the difference in level is small in this transfer part and the paper cylinder part of the seedling P is placed. Since Pa and leaf Pb do not drop, seedlings can be transferred normally.

Further, an elastic roller 14 is provided on the roller 11, which contacts the seedling P from above and rotates in the opposite direction to the roller 11 immediately after the seedling P is transferred, so that the seedling P will not collide and swell. Supplied in rows of seedlings at regular intervals.

[Brief explanation of the drawing]

FIG. 1 is a front view of a seedling feeding device of a transplanter according to the present invention, and FIG. 2 is a plan view of the main part thereof. In the figure, 10 is a constant speed seedling supply device, 11 is a roller, 12 is a groove, 14 is an elastic roller, 20 is a variable speed seedling supply device, 21 is a leaf receiving belt as a plurality of belts, and 26 and 30 are a plurality of belts. A string belt is used as a belt, P is a seedling, Pa is a paper tube part, and Pb is a leaf part.

Claims (1)

[Scope of Claim for Utility Model Registration] A seedling feeding device for a transplanter comprising the following requirements a to f. a At a seedling transport speed corresponding to the traveling speed of the transplanter,
There is a constant-speed seedling feeding device in the planting section that feeds seedlings whose leaf part is longer than the length of the paper tube part. b. In addition to the constant speed seedling feeder, there is a variable speed seedling feeder that loads seedlings and feeds them horizontally while changing the seedling transport speed. c. In the constant-speed seedling supply device, the first thing that receives the seedlings from the variable-speed seedling supply device is a roller with a plurality of grooves, and the paper tube portion and leaf portion of the seedlings are placed on the roller. d. In the variable speed seedling supply device, multiple belts are used to place and deliver the seedlings to the constant speed seedling supply device, and the paper tube portion and leaf portion of the seedlings are placed on the multiple belts. e The terminal ends of the multiple belts of the variable speed seedling supply device are biting into the grooves of the rollers of the constant speed seedling supply device. f. The constant speed seedling feeding device is provided with an elastic roller that contacts the seedlings from above and rotates in the opposite direction to the rollers immediately after the seedlings are transferred onto the rollers.