JPH08103108A - Digging part structure of crop seedling stock harvester - Google Patents

Abstract

PURPOSE: To obtain an economical digging part structure capable of digging seedling stocks so as to reduce attachment of mud without damaging the root part and new buds and simplifying the backward mud-dropping apparatus and improving mud dropping performance by relatively simple remodeling forming a sledge in stepped shape in which the rear part is escaped in the lateral directions. CONSTITUTION: This digging part structure for digging planted seedling stocks is constituted of a plow 9 forming notches to the ground on the sides and the lower part of the root part of planted seedling stocks and a sledge 8 capable of guiding to the side of foliage part of planted seedling stocks in a state formed in longitudinally long shape protruded to the front and rear of the plow 9. In the guide side 8A acting on the planted seedling stocks of the sledge 8, the rear guide side 35 guiding to the seedling stocks in the rear side part to the plow 9 is formed in recessed and stepped shape on more lateral outside than the sledge guide side 34 on more forward side than the rear guide side 35.

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. It relates to the shape of the sled provided.

[0002]

2. Description of the Related Art As a crop seedling harvesting machine, in Japanese Patent Application No. 6-95137 filed previously, a series of harvesting steps from digging the strawberries in the ground to removing the mud and collecting it on the machine body. Something that can mechanize is proposed. In the proposed technology, by devising the shape and arrangement of the sled and plow, while making it less likely to damage the roots and shoots that spread laterally under the ground, a cut is formed in the ground near the root, and mud adheres as much as possible. It has the advantage that it can be dug in a small amount.

[0003]

In the above harvesting machine, a dedicated mud removing device is provided at the rear of the machine body to remove excess mud attached to the roots before harvesting. It has become necessary to enhance the functions. Therefore, in order to enhance the mud dropping function, it is effective to reduce the mud adhesion at the digging stage, so it is desirable to form the cut with the plow closer to the root, and for that purpose It is important to set the guide of the seedlings to be more severe, that is, to set the guide width by the sleds on the left and right to the width of the seedlings. However, if the guide width by the sleds on the left and right is set to the bare minimum of the stem of the seedling, there is a risk that laterally expanding roots or sprouts will strongly slide on the side of the sled's guide during pulling while pinching the stem. Yes, there is room for improvement. An object of the present invention is to provide a dug portion structure that can be dug from the ground without damaging the roots and sprouts and with less mud adhesion.

[0004]

[Means for Solving the Problems] To achieve the above object, the present invention provides a plow forming a notch with respect to the ground on the side and below the root of a planting seedling, and in front of and behind this plow. With a sled that can be guided to the side of the foliage of the planting seedlings in a state of being formed in a long shape before and after projecting, and configuring a dug portion for digging the planting seedlings from the ground, The guide side that acts on the sled planting seedlings has a step shape in which the rear guide side that acts on the seedlings in the rear part with respect to the plow is recessed laterally outward than the sled guide side in front of the rear guide side. It is characterized by being formed.

[0005]

According to the above characteristic structure, for example, as shown in FIGS. 3 and 4, the left and right sleds 8, 8 are set to have a left-right interval substantially the same as the width of the stem portion of the seedling M, and the plow position is set. Is set so that it cannot be swung to the left and right, the cut K by the plow 9 can be formed at the edge of the root, and the adhesion of excess mud can be minimized. Immediately after the plow 9 acts, the seedlings M are pulled out upward and rearward from the ground by sandwiching and transporting the stalks by the left and right belts 11, 11, and the rear guide side surface 35 of the sled 8 at that portion is removed. Since it is recessed laterally and the guide width by the left and right sleds 8 is wide, the excavation process can be completed without damaging the roots and sprouts by sliding contact with the sleds 8.

[0006] In order to obtain the above-mentioned action, for example, it is conceivable to form a shape in which the sled is not projected rearward from the site where the plow is present. It is impossible to support it on the ground because it requires a long grounding guide action that extends beyond the plow, and a large grounding area. Therefore, the configuration of the present application is effective. It is also conceivable to arrange a sandwiching belt for pulling up the seedlings rearward of the sled to use a sled of a conventional shape, but this makes the entire length of the machine unnecessarily long, which is also not preferable.

[0007]

As a result, it is possible to dig a seedling with less mud adhesion without damaging the roots and shoots by a relatively simple modification in which the sled is formed into a stepped shape in which the rear part escapes laterally. It was possible to economically realize the excavation part that can simplify the subsequent mud dropping device and improve the mud dropping performance.

[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 character shape and is attached to a portion of the guide side surface 8A which is the inner side surface of the sled 8 and which is recessed inward.

A portion of the sled 8 near the ground surface of the guide side surface 8A is formed as a flank 8a which is inclined laterally outward, and a vertical plow 9A is a flank vertical surface 9a which is inclined laterally outward. It is formed on. As shown in FIG. 3, the seedling M has a downwardly swollen shape in which a shoot m and its root mn are formed around the plant body. Therefore, by adjusting the shapes of the sled 8 and the plow 9 to match them, the sled side surface 8
It is possible to perform an effective guide function and to form a cut K near the side of the plant while preventing the shoots m from being scratched or scraped by A or the vertical plow surface 9A.

The sled 8 will be described in more detail. As shown in FIGS. 3, 4 and 8, the plow 9 is attached to the center of the front and rear of the sled 8 and acts on the planted seedling M of the sled 8. Guide side 8
In A, the rear guide side surface 35, which acts on the seedling M in the rear side portion with respect to the plow 9, is the rear guide side surface 35.
It is formed in a step shape that is recessed laterally outward from the sled guide side surface 34 in the front. The level difference between the side surfaces 34, 35 is set so as to substantially match the width of the lower end of the escape side surface 8a so that the root n and the sprout m do not rub against the sled 8 when being pulled out by the pair of conveyor belts 11. The contact area is not reduced so much.

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 nipped 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 T.
The drive swing mechanism 3B functions so that the drive swing mechanisms 8B and 8 are driven to face each other so as to swing in 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 transport direction across the plurality of mud dropping claws 18 that move into the root 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.

As shown in FIG. 9, the left and right plows 8 are pivotally supported on the work frame 10 so as to be capable of swinging back and forth about a lateral fulcrum Y provided in the front and rear intermediate portions thereof, and the rear portions thereof are supported by a balance support mechanism 36. Are connected to the work frame 10. The balance support mechanism 36 allows a bar 37, which is erected from the rear end of the sled 8 in a pivotally supported state, to pass through a shaft member 38 rotatably supported by the work frame 10, and the shaft member 38.
Winding springs 39, 39 are fitted on the upper and lower sides of the coil. Therefore, while supporting the sled 8 without wobbling, the upper and lower winding springs 39, 39 are moved according to the elevation of the work frame 10.
It can rotate against the ground and can be grounded in parallel with the ground.

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 body are belt-interlocked with each other, and from this counter shaft 28, the crawler traveling device 5 and the fulcrum. 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 transporting section 2B, the mud transporting apparatus 3 loosens the root while loosening the roots. The transport speed by the rear transporting section 2B is V ₁ , and the mud dropping is performed. 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 Example] In this example, a pair of sleds 8 and 8 are provided on the left and right sides of the seedling M, but a sled 8 is provided on only one of the left and right sides of the seedling M. The present invention may be applied.

It should be noted that reference numerals are given in the claims for convenience of comparison with the drawings, but 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 perspective view showing the shape of a sled.

FIG. 9 is a side view showing a sled support structure.

[Explanation of symbols]

 1 excavated part 8 sled 8A guide side surface 9 plow 34 sled guide side surface 35 rear guide side surface

Claims (1)

[Claims] 1. A plow (9) forming a notch with respect to the ground on the side and below the root of the planting seedling, and a long shape extending forward and backward of the plow (9). Sled that can be guided to the side of the foliage of the planted seedlings in the closed state (8)
And a guide side surface (8A) which acts on the planting seedling of the sled (8), and which constitutes a dug portion (1) for digging the planting seedling from the ground. Rear guide sides (35) that act on the seedlings in the rear part against
However, the excavation part structure of the crop seedling harvester is formed in a step shape that is recessed more laterally outward than the sled guide side surface (34) on the front side of the rear guide side surface (34).