JPH0889022A - Digging part structure of crop seedling harvester - Google Patents

Abstract

PURPOSE: To provide a digging part structure capable of relatively easily changing the posture by enabling the housing of a plow above a sleigh, contributing to the improvement in the machine balance in non-working stage, having economic merit to enable the existing sleigh as a protecting member and preventing the contact of the sleigh with other parts to prevent the damage of the sleigh, etc. CONSTITUTION: The digging part for digging up a planted seedling from a field is provided with a sleigh 8 guiding the digging part along the side of the leaf and stalk of the planted seedling and a plow 9 to form slits on both sides of and under the root part of the seedling. The posture of the plow 9 is made to be changeable by a hinge 34 and a locking mechanism between a working posture to position the plow 9 below the sleigh and enable the formation of slits in the soil and a housing posture to position the plow 9 above the sleigh 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crop seedling harvesting machine that mechanizes a series of operations for digging and harvesting a mother plant of a rooting crop seedling such as straw grass. The present invention relates to a structure for changing the posture of a plow provided.

[0002]

2. Description of the Related Art As a crop seedling harvesting machine, the actual Kaihei 4-8
The one disclosed in Japanese Patent No. 0307 is already known. This product can mechanize a series of seedling harvesting processes from excavation of straw grass in the ground to dropping it into the body and collecting it on the machine.The tip of the excavation part is a plow that plunges into the soil. It is provided with (code A) and a sled (code 15) that helps to determine the position of the plow.

[0003]

In the above harvesting machine, the plow, which is a blade for cutting the soil, projects downward, so that the plow contacts another object during traveling or loading and unloading on a transport vehicle such as a truck. As a result, other objects may be damaged or the plow itself may be damaged, and it is necessary to take some measures. Therefore, it was proposed that the plow be detachable so that it can be removed when it is not needed, and that a protective cover should be equipped.However, the former method is troublesome to attach and detach and there is a risk of loss when detached. However, with the latter means, the cover may be lost, and the protruding state remains as it is and is not a fundamental solution for contact with other objects, so there was room for further improvement. An object of the present invention is to provide an object that can eliminate the risk of contact between the plow and another object at times other than harvesting work such as traveling and unloading.

[0004]

[Means for Solving the Problems] To achieve the above object, the present invention provides a sled for guiding to the side of the foliage of a planted seedling, and a lateral and lower side of the root of the planted seedling. A plow that forms a cut against the ground constitutes a digging part for digging a planted seedling from the ground, and the plow is located below the sled to enable the formation of a cut. It is characterized in that the posture and the storage posture positioned above the sled can be changed.

[0005]

According to the above characteristic structure, the plow is in the working posture during the harvesting work and is in the retracted posture except during the harvesting work. However, since the plow is located above the sled in the retracted posture, the sled is a protection member for the plow. As a result, it is possible to almost eliminate the possibility that another object will come into contact with the plow. In addition, the plow does not come off the excavation portion in any of the stored and working postures, so there is no risk of loss, and the plow posture changing operation is easier and easier than the attaching / detaching operation.

Further, since it does not project downward in the retracted posture,
It is possible to reduce the amount of rise of the excavation part during non-harvesting work, shorten the time required to raise and lower the excavation part, lower the center of gravity when ascending, and raise the plow slightly above the ground. Since the harvester can be parked in the closed state, it will be possible to use a garage that is lower than before.

[0007]

As a result, by the device that allows the plow to be stored above the sled, the posture changing operation thereof is relatively easy, and it is possible to contribute to the improvement of the body balance when not in operation.
In addition, it is possible to eliminate the risk of damage to the plow or other objects by preventing the contact between the plow and the other objects first, while having the economical efficiency that the sled, which is an existing part, can also be used as the protection member.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 and FIG. 2 show a harvester for a straw seedling strain, which is an example of a crop seedling. Digging section 1 for digging underground seedlings M
And a sandwiching and lifting device 2 that suspends and lifts the seedlings M excavated by the excavating unit 1 to the upper rear, and mud of the seedlings M in a suspended transfer state by the sandwiching and lifting device 2. The traveling machine body 4 is provided with the sludge-removing transporting device 3, and the traveling machine body 4 is provided with a pair of left and right crawler traveling devices 5, 5, a driving unit 6, an engine 7, and the like, thereby forming a strawberries seedling harvester. .

The excavation section 1 is a lifting and holding device in which a pair of left and right sleds 8 and 8 attached to a work frame 10 and a pair of left and right plows 9 and a pair of left and right transport belts 11 and 11 are arranged to face each other. It is composed of the front end portion 2a of the feeding device 2. The nip-lifting device 2 includes a front transport unit 2A having a steep rear upslope,
It is made up of a gentle rearward-inclined rear transport unit 2B, and both transport units 2A, 2B are paired with left and right transport belts 11, 11.
It is configured such that the front and rear rolling wheels 12 and 13 are supported by the work frame 10. The front and rear transport units 2A and 2B are
In order to ensure the delivery of the seedlings M, they are partially overlapped with each other in the front and back, and the rear transport section 2B extends to the vicinity of the rear end of the machine body 4 to hold the stems of the seedlings M over a long distance. And hang and transfer.

The digging section 1 will be described in detail. As shown in FIGS. 3 and 4, the sled 8 has a cross-section ∪ shape composed of left and right sled side surfaces 8A, 8A and a grounding surface 8B. The right sled 8 on the already cut side is formed on the ground contact surface 8B wider than the left sled 8 on the uncut side, and the ground contact area is increased as much as possible so that a stable sled action can be exhibited. The plow 9 is a front view L composed of a vertical plow part 9A and a horizontal plow part 9B.
It is formed in a letter shape, and is attached to a portion of the inner surface 8A of the sled 8 which is recessed inward.

A portion of the sled side surface 8A on the seedling side near the ground surface is formed on a flank side 8a which is inclined laterally outward, and a vertical plow portion 9A is a flank vertical surface inclined laterally outward. 9a. This is a seedling M as shown in FIG.
Has a sprout m and its root mn formed around the plant body, and has a downwardly swollen shape. Therefore, by adjusting the shapes of the sled 8 and the plow 9 to match them, the sled side surface 8A
The vertical guides 9A and the vertical plowed surface 9A prevent the shoots m from being scratched or chipped, and an effective guide action and cut K formation near the side of the plant can be performed.

The mounting structure of the plow 9 will be described in detail. As shown in FIGS. 8 and 9, the plow 9 has a longitudinal axis Y with respect to the sled 8.
It is pivotally mounted around and is located below the ground contact surface 8B of the sled 8 and has an action posture (state shown by the solid line in FIG. 8) capable of forming the notch k, and above the ground contact surface 8B. The posture can be freely changed to the storage posture (state of the virtual line on the upper side of FIG. 8). That is, by connecting the plow 9 made of a bent plate material and the grounding surface 8B of the sled 8 via the hinge 34, the plow 9 is placed so as to bite into the middle part of the sled 8 and the partition plates before and after the plow 8 are arranged. The plow 9 can be locked and fixed at a predetermined angular position by 35, 35 and the locking mechanism B arranged at the upper end of the plow 9.

The locking mechanism B includes a pair of front and rear sliding pins 36,
36, a compression type winding spring 37, an operation piece 38 mounted on the sliding pin 36, and the like, while inserting the two sliding pins 36 into a sliding portion 39 formed by bending at the upper end of the plow 9. The coil spring 37 is pre-compressed between the holes 36a formed at the rear of the sliding pin 36. And
By screwing the operation piece 38 to the sliding pin 36 through the long hole 39a formed in the slide portion 39, the two operation pieces 38, 38 are stabilized in a state of being close to both ends of the long hole 39a, and at that time. The tip of each sliding pin 36 projects a little and can be inserted into an insertion hole 40 formed in the partition plate 35.

That is, the operating pieces 38, 38 are picked up by fingers to pull out the respective sliding pins 36 from the partition plates 35, and then the plow 9 is swung about the axis Y to bring the operating piece 38 into an intended position. By releasing the knob and inserting the sliding pin 36 into the insertion hole 40 of the partition plate 35, the attitude changing operation of the plow 9 is completed. The insertion holes 40 are provided at three places, and the upper insertion hole 4
0 is in the working posture, the lower insertion hole 40 is in the retracted posture, and the sliding pin 36 is in the intermediate insertion hole 40 near the upper insertion hole 40.
When the insert is inserted, the plow 9 is slightly raised, and a shallow plow posture (state of a virtual line on the lower side in FIG. 8) for making the cut k at a shallow depth appears. It is convenient if the positions of the intermediate insertion holes 40 are slightly different between the left and right sleds 8 so that the tips of the plow 9 do not interfere with each other.

Further, as shown in FIG. 4, the seedling M starts to be sandwiched by the pair of conveyor belts 11 (specifically, the front and rear central portions of the stem and the rotation axis Y of the front wheel 12 are seen from a side view). In a matched state, the horizontal plow 9B is located at the front-rear intermediate portion of the root, and the plow 9 and the conveyor belt 11 pair are arranged relatively to each other so that the cut K is not completely formed.

As shown in FIGS. 1 and 2, a weeding device 15 for weeding the planted seedlings M is provided in a state of being arranged above the sleds 8, 8 on the left and right. The vertical weeding device 15
It is composed of a winding drivable chain 17 having a weeding claw 16, and the weeding claw 16 is adapted to automatically switch between a protruding weeding action posture and a retracted retracted posture, and hang down. Or stalk while straightening the stem so that it can be easily pulled out.

As shown in FIGS. 5 to 7, the mud-dropping conveying device 3 shakes a large number of mud-dropping claws 18 that can act on the root n of the seedlings to be sandwiched and conveyed in the left-right direction with respect to the seedling-conveying direction. It is provided with a pawl transport mechanism 3A attached to a rotary chain (corresponding to an endless rotary band) 19 in a movable state, and a drive rocking mechanism 3B for rocking the mud dropping pawl 18 in the left-right direction. ing. Next, each mechanism will be described in detail.

The pawl transport mechanism 3A is provided with front and rear sprockets 2.
A rotating chain 19 is wound around 0 and 20, and a horizontally elongated substrate 21 mounted on a chain link 19a is spaced at predetermined intervals so that it can swing around a front-rear axis P and has a substantially V-shaped sludge drop. The claws 18 are pivotally supported in two left and right rows. The mud dropping claw 18 is formed by bending a bar material, and in order to stabilize the conveyance posture of the wide substrate 21, a pair of left and right guide bars 2 that slidably contact the lower surfaces of the left and right bent ends of the substrate 21.
2 and 22 are provided.

The drive swing mechanism 3B has a pair of left and right support shafts 23a, 23 arranged immediately below the front and rear axis P.
Operation bar 2 with a reverse U-shaped bar that is long in front and back in side view
The operated arms 2 which support the interlocking members 23 and 23 formed by fixing 3b and 23b and are attached to the respective support shafts 23a.
4 and the interlocking rod 26, which is bearing-fitted to the rotationally driven crankshaft 25, is pivotally mounted. The shaft center X of the support shaft 23a is parallel to the shaft center P of the mud dropping claw 18, and the operation bar 23b is located at the crotch of the mud dropping claw 18 on the rearward moving side, which is the upper side of the rotary chain 19, and the lower side. On the forward moving side, which is the side, the shaft 2 is attached to the crotch of the mud dropping claw 18.
3a is located.

When the rotational power is transmitted to the crankshaft 25,
The left and right interlocking members 23 reciprocally swing back and forth around the front-rear axis X to swing the mud dropping claw 18 on the upper side to the left and right within a predetermined angle range, and the lower side in a state of straddling the support shaft 23a. The mud dropping claw 18 at is moved forward without swinging left and right. Therefore, the claw transport mechanism 3 that drives the rotary chain 19 to transport the two rows of mud dropping claws 18, 18
When the drive rocking mechanism 3B is driven in the driving state A, the interlocking member 23 and the mud dropping nail 18 are slidably contactable with each other. Share M
It effectively loosens the root n of the rice and removes the mud.
That is, a pair of left and right mud dropping claws 18, 18 are arranged side by side to form a pair of claws.
The drive swing mechanism 3B functions so as to drive the eight so as to face each other so as to swing in mutually opposite directions.

That is, in the state in which the drive swing mechanism 3B drives the reciprocating swing motion of the interlocking member 23 extending along the conveying direction across the plurality of mud dropping claws 18 that move in the root portion n of the seedling M. In addition to being provided and configured, the interlocking member 23 is set to a sliding contact guide structure in which the mud dropping claws 18 are laterally abuttingly interlocked while permitting the conveyance movement of the mud dropping claws 18 that are moved by the drive of the endless rotation band 19. There is. As shown in FIG. 6, when the left and right mud dropping claws 18, 18 are swung toward the side closer to each other, each mud dropping claw 18, 1 is viewed in the transport direction.
Right and left mud dropping claws 18 and 1 so that the movement trajectories of 8 may interfere.
8 is displaced in the front-rear direction.

The sludge transporting device 3 is also supported by the work frame 10, and the work frame 10 has a fulcrum shaft 27 which will be described later.
It is swingable about its axis Q and can be driven up and down by the expansion and contraction movement of the hydraulic cylinder 14 installed over the work frame 10 and the machine body 6. That is, the entire harvesting work device A including the digging unit 1, the sandwiching and lifting device 2, the sludge transporting device 3, etc. is mounted on the machine body 6 so as to be capable of being driven up and down, and the work frame 10 is lifted and lowered according to the ground situation. Even so, the relative positional relationship between the picking and lifting unit 2 and the mud-falling transport device 3 and the harvesting work device A does not change.

The transmission system will be briefly described. As shown in FIGS. 1 and 2, the output shaft 7a of the engine 7 and the counter shaft 28 at the front end of the machine are belt-interlocked with each other, and the crawler traveling device 5 and the fulcrum are supported from the counter shaft 28. A belt is interlocked with the shaft 27. From the fulcrum shaft 27, the front crank shaft 25 and the front sprocket 20 of the pawl transport mechanism 3A are interlocked, and from the rotary shaft 20a of the front sprocket 20 to the relay shaft 2
The belt is linked to 9. The relay shaft 29 is interlocked with the sandwiching and lifting device 2 through the upper transmission shaft 30 and the weeding device 15 through the lower transmission shaft 31, and the rear wheel shaft of the front transport unit 2A. The shaft is transmitted from 32 to the rear transport unit 2B.

Next, a series of harvesting operations of this harvester will be described. With the progress of the aircraft, the left and right plows 9 and 9 create cuts K on the left and right of and below the planting Mushroom seedling strain M, while the right and left sleds 8 and 8 and the weeding device 15 divide the seedling M. The stalks of the seedlings M begin to be sandwiched between the conveyor belts 11 and 11 of the front conveying section 2A in the state where the cuts K are formed to facilitate excavation, and the seedlings M are pulled out from the ground by the conveying force. At the same time, the stalks are clamped and lifted backward and upward.

Then, in the state of being suspended and transported by the rear transport unit 2B, the mud transport device 3 loosens the root while loosening the mud. The transport speed by the rear transport unit 2B is V ₁ , Transport speed by the transport device 3: V ₂
Then, the respective drive speeds are set so that the relationship of V ₂ > V ₁ is established. By the way, V ₁ = 0.35m / s and V ₂ = 0.40m / s are set, and by this speed setting, the root part of the seedling M such as the rear part, the center part and the front part is spread over the whole root part. The effect of loosening mud is imparted. The seedlings M, for which the operation of the mud-dropping transport device 3 has been completed, fall and are collected by the collecting unit 33 at the rear of the machine body.

[Other Embodiment] As shown in FIG. 10, a plow 9 is pivotally supported on a sled 8 so as to be swingable around a front transverse axis Z, and
A means for fixing to the sled 8 with an arcuate elongated hole 41 formed in the plow 9 around the horizontal axis Z and the butterfly bolt 42 may be used. In this case, it is convenient to make the arc-shaped long hole 41 into a saw-tooth shape or to provide a plurality of independent round holes so as to prevent the slipping and swinging of the plow 9 due to an impact.

Further, as shown in FIG. 11, the switching lever 46 swingable at the intermediate fulcrum Q, the biasing spring 43, and the long hole 44 of the plow 9 into which the tip of the switching lever 46 can be inserted are dead. The plow posture changing mechanism 45 having a point structure may be configured.
The switching lever 46 is a tension member for the plow 9 by rotating about 180 degrees, and can be locked without using other fixing means such as pins or bolts.

It should be noted that although reference numerals are given in the claims for convenience of comparison with the drawings, the present invention is not limited to the structures of the accompanying drawings by the entry.

[Brief description of drawings]

[Figure 1] Side view of the strawberries seedling harvester

[Fig. 2] Plan view of the strawberries seedling harvester

FIG. 3 is a cross-sectional view of the main part of the excavation part.

FIG. 4 is a partial plan view of a dug portion.

FIG. 5 is a side view showing the structure of the sludge transporting device.

FIG. 6 is a cross-sectional view of the main part of the sludge transporting device

FIG. 7 is a perspective view showing a mounted state of the mud dropping claws.

FIG. 8 is a cross-sectional view showing a mounting structure for a plow.

FIG. 9 is a sectional plan view showing the structure of the locking mechanism.

FIG. 10 is another embodiment 1 of the structure for changing the posture of the plow.

FIG. 11 is another embodiment 2 of the structure for changing the posture of the plow.

[Explanation of symbols]

 1 excavation part 8 sled 9 plow

Claims (1)

[Claims] 1. A sled (8) for guiding the side of the foliage of the planting seedling and a plow (9) for forming a notch to the ground below and to the side of the root of the planting seedling. The excavation section (1) for excavating the planted seedlings from the ground is provided with
The plow (9) can be changed between a working position in which the plow (9) is located below the sled (8) and can form the cut, and a storage position in which the plow (9) is located above the sled (8). The structure of the excavated part of the crop seedling harvester that is configured.