JP2003204711A - Leaves/stems pull-up structure for root vegetable harvester - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a leaves/stems pull-up structure for a root vegetable harvester capable of pulling up the leaves/stems of root vegetables fallen along the advancing direction of the harvester body on a ridge slope and thereby further ensuring the root vegetables to be pulled up from ridges by making use of their leaves/stems and the leaves/stems to be cut off. <P>SOLUTION: The root vegetable harvester for harvesting the root vegetables W planted in the ridges includes a plurality of leaves/stems pull-up devices 10 positioned on both sides of the root vegetables W to be harvested and functioning to pull up the leaves/stems Wb projected off the planting holes h of a mulching sheet F laid on the ridges by longitudinally turning hooking tines 23. Of these devices 10, the tine 23 equipped on the device 10D and acting on the leaves/stems Wb fallen on the ridge slope is designed to take a posture of its tip's turning inward of the ridge and be longer than the respective tines 23 equipped on the devices 10A, 10B and 10C and acting on the leaves/stems Wb fallen on the ridge top. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a root-stem pulling structure for harvesting root vegetables such as onions, carrots, radishes, or garlic, which are planted in ridges.

[0002]

2. Description of the Related Art An onion harvester, which is an example of a root vegetable harvester, is located on both sides of a root vegetable to be harvested and hung on a ridge, as disclosed in, for example, Japanese Patent Laid-Open No. 2001-28920. Among the leaf stalks of root vegetables protruding from the planting holes of the multi-sheets that were laid down, the leaf stalks that fell down so as to intersect the traveling direction of the aircraft on the upper surface and slope of the ridge were pulled up by vertical movement of the locking claws. The leaf stem pulling device and the leaf stems that have been pulled up by the leaf stem pulling device and the ridges that have fallen along the upper surface of the ridges along the traveling direction of the machine are scratched backward and upward by the lateral movement of the locking claws. Some of them are equipped with a leaf-stem scraping device that raises the stem, and, in the conventional stem-raising structure of such a root vegetable harvester, the locking claws of the stem-picking device advance the body when pulling the stem. Extends straight in a direction It has been constructed in such a way that the orientation attitude.

[0003]

Therefore, according to the above-mentioned prior art, a leaf stem that has collapsed so as to intersect the traveling direction of the airframe on the upper surface and the slope of the ridge, or along the traveling direction of the airframe on the upper surface of the ridge. Although the fallen leaf stem can be pulled up backward and upward by a leaf pulling device or a leaf scraping device, it is possible to pull up the fallen leaf stem along the ridge slope along the traveling direction of the aircraft. Therefore, it is impossible to pull the root vegetables from the ridges using the leaf stems pulled up by the leaf stem pulling device or the leaf stem scraping device, or cutting the root stems of the root vegetables. The certainty of was decreasing.

The object of the present invention is to make it possible to pull up a leaf stalk that has fallen down along the traveling direction of the body on the slope of the ridge, and to pull up root leaves from the ridge and leaves using the leaf stem. It is to ensure that the cutting of the stem can be performed more reliably.

[0005]

[Means for Solving the Problems] [Structure] In order to achieve the above object, in the invention according to claim 1 of the present invention, harvesting is performed by a root vegetable harvester for harvesting root vegetables planted in a ridge. Equipped with multiple leaf stem pulling devices that are located on both sides of the root vegetable and project the leaf stem of the root vegetable protruding from the planting hole of the multi-sheet hung on the ridge by vertically moving the locking claws. Then, of the plurality of the leaf stalk pulling devices, a locking claw provided on the leaf stalk pulling device that acts on the foliage that has fallen on the slope of the ridge is provided with a locking claw that is directed toward the inside of the ridge. It is formed in a facing posture and longer than a locking claw provided in a leaf stem pulling device that acts on a leaf stem that has fallen on the upper surface of the ridge.

[Operation] According to the invention described in claim 1, the locking claw of the leaf stem pulling device that acts on the leaf stem that has fallen on the slope of the ridge intersects the traveling direction of the machine body on the slope of the ridge. As shown in the figure, it will intersect with both the fallen leaf stem and the fallen leaf stem along the advancing direction of the aircraft, and by the vertical movement of the locking claw, it falls on the slope of the ridge. It will be possible to reliably pull up existing leaf stems regardless of their posture.

[0007] Further, the locking claw of the leaf pulling device that acts on the leaf stem that has fallen on the slope of the ridge is longer than the locking claw of the leaf pulling device that acts on the leaf stem that falls on the upper surface of the ridge. By increasing the length of the case, the distance between the case of the foliage pulling device that acts on the foliage that has fallen on the slope of the ridge and the slope of the ridge, where the multi-sheet is likely to float, can be increased,
As a result, the multi-sheet floating from the slope of the ridge is damaged by contact with the case of the leaf pulling device, and the broken portion is effectively caught by the locking claw and caught in the leaf pulling device. You can avoid it.

[Effects] Therefore, since the leaf stem that has fallen on the slope of the ridge can be pulled up satisfactorily regardless of its posture, the root stem can be pulled up from the ridge or the stem can be cut using the leaf stem. It is possible to more reliably avoid the interruption of the work due to the trouble that the multi-seat is damaged and is caught in the foliage pulling device. It has become possible to improve efficiency.

[Structure] In the invention according to claim 2 of the present invention, in the invention according to claim 1, an elastically deformable resin material is adopted for a tip end portion of the locking claw, and
The tip portion was formed into a spatula shape.

[Operation] According to the second aspect of the present invention, since the elastically deformable resin material is used for the tip portion of the locking claw, the tip portion of the leaf stem collapsed on the multi-seat. When touching the multi-sheet when picking up
It is elastically deformed to prevent the multi-sheet from being caught.

By the way, for example, when the tip portion of the locking claw is formed in a rod shape with an elastically deformable resin material, the reaction force when the tip portion is elastically deformed becomes large. Therefore, in order to more reliably scoop and pull up the leaf stem by the locking claw of the leaf stem pulling device, for example, a leaf stem pulling device,
If the contact amount of the locking claws with respect to the multi-sheet is increased by disposing the lower end, which is the starting end of the leaf stem, closer to the multi-sheet, the lower end of the leaf-pulling device becomes multi-sheet. The closer it is, the larger the reaction force that acts on the multi-sheet due to the elastic deformation of the tip of the locking claw due to contact with the multi-sheet, and the greater the deformation of the multi-sheet due to the reaction force, the tip of the locking claw. The parts are easily caught on the multi-sheet, and the multi-sheet is easily damaged due to the catch.

Therefore, in the invention described in claim 2, not only the elastically deformable resin material is used for the tip of the locking claw, but also the tip is formed in the shape of a spatula. In order to more reliably pick up and pull up the leaf stems by the locking claws of the stem pulling device, for example, the leaf stem pulling device is arranged such that the lower end portion that is the leaf stem pulling start end portion is brought closer to the multi-sheet. Placed in a state,
Even if the contact amount of the locking claw on the multi-seat is increased,
When the locking claw comes into contact with the multi-sheet, the waist breaking phenomenon easily occurs at the tip part of the locking claw, and only the contact end side of the tip part bends and deforms. The reaction force acting on the multi-seat is greatly reduced compared to the case where the elastic deformation occurs, and the deformation of the multi-seat due to the reaction force is also considerably reduced, so the tip of the locking claw may be caught on the multi-seat. Can be suppressed more effectively, and damage to the multi-sheet due to the catching can be more reliably avoided.

Further, when the locking claw is in contact with the multi-sheet, only the contact end side of the tip portion thereof is bent and deformed, so that the portion not in contact with the multi-sheet is not deformed and the leaf stem is not deformed. Since it will maintain a proper posture that suitably acts against, compared to the one in which the entire tip portion of the locking claw is elastically deformed and the posture with respect to the leaf stem is greatly changed,
The leaf claws can be picked up and pulled up by the locking claws more reliably and satisfactorily.

[Effects] Therefore, the leaf by the locking claw of the leaf-pulling device is not interrupted due to the trouble that the multi-sheet is damaged by the tip of the locking claw and caught in the leaf-pulling device. The stalk can be scooped up and pulled up more reliably and satisfactorily, and thus the work reliability and work efficiency can be improved more effectively.

[Structure] In the invention according to claim 3 of the present invention, in the invention according to claim 2, the locking claw includes a base end portion and an end portion that are connected to an endless rotation band. To 2
In addition to being configured to be dividable, the base end portion is formed of a hard material so as to have a sheath portion for externally fitting and holding the base end portion of the distal end portion.

[Operation] According to the invention described in claim 3, the specification of the locking claw is changed according to the type of root vegetables to be harvested or the method of cultivating root vegetables such as mulch cultivation and open field cultivation, and When performing repairs according to the damage condition of the tip of the stop claw, leave the connection between the endless rotation band where the connection part is hidden by the case of the leaf stem pulling device and the base end of the locking claw as it is. Since it is only necessary to replace the base end part of the tip part exposed from the case of the stem pulling device, it is possible to reduce the labor and cost required for replacement as compared with the case of replacing the entire locking claw. .

Further, by adopting a hard material at the base end portion, the locking claws are more suitable for the leaf stem than in the case where the entire locking claws are made of an elastically deformable resin material. It becomes easier to maintain the proper posture to be maintained, and since the proximal end portion of the distal end portion is externally fitted and held by the sheath portion of the proximal end portion, the proximal end portion of the distal end portion when scooping up or pulling up the leaf stem is Unnecessary elastic deformation can be suppressed, and accordingly, it becomes easier to maintain the tip in a proper posture that suitably acts on the leaf stem, and therefore, the scooping and pulling up of the leaf stem by the locking claws can be further facilitated. You can do it reliably and satisfactorily.

[Effect] Therefore, the kind of root vegetables to be harvested,
Alternatively, it is possible to change the specifications of the locking claws according to the cultivation method of root vegetables such as multi-cultivation and open field cultivation, and improve workability when performing repairs according to the damage state of the locking claw tip and the like. In addition, it is possible to reduce the cost required for changing the specifications and repairs, and it is possible to more reliably and satisfactorily perform scooping and pulling up of the leaf stem by the locking claws, so that the reliability of the work can be further improved. Became.

[Structure] In the invention according to claim 4 of the present invention, in the invention according to claim 3, there are provided through-holes respectively formed on a pair of opposing side surfaces of the sheath portion,
An insertion portion that is inserted into the through hole formed in the base end portion, and has a reduced diameter portion at the distal end that reduces the diameter when inserting into each of the through holes and expands the diameter after insertion and locks to the side surface. And a locking pin formed so as to have a head portion that comes into contact with the side surface when the diameter of the expanded portion is increased after being inserted into each of the through holes. It is configured to prevent slipping out.

[Operation] According to the invention described in claim 4, the base end portion of the distal end portion is inserted into the sheath portion of the base end portion, and the insertion portion of the locking pin is provided with a pair of side surfaces facing each other of the sheath portion. A state in which the head of the locking pin abuts one side surface of the sheath portion in each through hole formed in the base end portion and the expanded and contracted portion expands in diameter and locks to the other side surface of the sheath portion. So that the distal end portion and the proximal end portion of the locking claw can be retained and coupled while the proximal end portion of the distal end portion is externally fitted and held by the sheath portion of the proximal end portion. become. Further, by reducing the diameter of the expanded portion of the locking pin that connects the distal end portion and the proximal end portion of the locking claws to each other, the locking between the expanded portion and the other side surface of the sheath portion is released, By pulling out the insertion portion of the locking pin from each of the through holes of the sheath portion and the proximal end portion, it becomes possible to release the retaining connection between the distal end portion and the proximal end portion of the locking claw.

Moreover, since the disengagement prevention connecting portion between the tip end portion and the base end portion by the locking pin is the portion where elastic deformation of the tip end portion is prevented by the sheath portion of the base end portion, the tip end portion elastically deforms. The locking pin is prevented from being subjected to a reaction force at the time of doing so that it is not necessary to make the locking pin strong enough to withstand the reaction force when the tip end is elastically deformed. Therefore, the durability can be improved while using a relatively inexpensive locking pin.

[Effects] Therefore, since it is possible to easily prevent the distal end of the locking claw from slipping off from the base end and releasing the locking, by operating the locking pin, the kind of root vegetables to be harvested and the method for cultivating the root vegetables. It is possible to more effectively improve the workability when changing the specifications of the locking claw according to the above, and repairing according to the damage state of the tip of the locking claw, etc.
It has become possible to reduce costs and improve durability.

[Structure] In the invention according to claim 5 of the present invention, in the invention according to claim 4, the shaft of the locking pin with respect to the base end portion is provided in the sheath portion or the expansion / contraction portion. A cam surface was formed to reduce the diameter of the expanded portion with relative rotation around the center.

[Operation] According to the invention described in claim 5, without directly performing the diameter reduction operation of the expanded portion of the locking pin in which the distal end portion and the proximal end portion of the locking claw are connected so as not to come off. Also, by operating the head of the locking claw to rotate the locking pin around its axis with respect to the base end, the expanded portion is reduced in diameter and the other of the expanded portion and the sheath portion is reduced. The engagement with the side surface can be released, and the insertion portion can be extracted from the through holes of the sheath portion and the base end portion.

Then, in a state in which the leading end portion and the base end portion of the locking claws are coupled with the locking pin so as not to come off, the locking pin is locked so that the head of the locking pin is located at a position where it can be easily operated from the outside. If the posture of the pin is set, the push-in operation of the locking pin using the head when inserting the insertion part of the locking pin into each through hole of the sheath part and the base end part, and reducing the expanded part By doing so, it becomes possible to easily perform the rotation operation of the locking pin using the head when releasing the locking between the expanded portion and the other side surface of the sheath portion.

[Effect] Therefore, it becomes possible to more easily prevent the distal end from slipping off and releasing the distal end from the base end by operating the locking pin. Therefore, the type of root vegetables to be harvested and the method for cultivating root vegetables can be obtained. Change the specifications of the locking claw according to
In addition, it is possible to further improve the workability when performing repairs according to the damaged state of the tip of the locking claw.

[0027]

1 to 20 show a configuration in which an onion harvester, which is an example of a root vegetable harvester, is changed to a multi-specification, and FIGS. 21 to 29 show the onion harvester in the open field. The onion harvester is basically a root vegetable W cultivated in the open field.
The onion W, which is an example of the onion W, can be harvested so that it can be harvested. By partially changing the basic configuration, the onion W cultivated on the flat ridges covered with the multi-sheet F can be harvested. It is possible to change the specifications to a multi-specification that makes it in such a state.

First, an open-field onion harvester having a basic structure will be described with reference to FIGS.

This onion harvester is an example of a root vegetable cultivated on a wide flat ridge in front of a traveling machine body A equipped with a three-wheel traveling type loop-shaped steering handle 1 along with its traveling. The structure equipped with the harvesting mechanism B that is configured to extract the two strips on the right side in the traveling direction of the four strips of onion W, which are all on the flat strip by the reciprocating traveling with respect to one flat strip. Is configured to process the onion W into a harvestable state.

The traveling machine body A is provided with a pair of left and right drive rear wheels 2 arranged so as to straddle the flat ridges and one free front wheel 3 arranged so as to move the right ridge bottom, and the machine body rear portion is provided. After the power from the engine 4 mounted on the vehicle is shifted by the transmission 5, the left and right shaft type transmission mechanisms 6 and the chain type transmission mechanism 7
Is transmitted to the left and right drive rear wheels 2 via. The left side shaft type transmission mechanism 6 is configured to be extendable and contractible, whereby the position of the left drive rear wheel 2 can be changed to the left and right, and thus the rear wheel tread can be changed according to the ridge width. It is like this. The idle front wheel 3 is configured to function as a gauge wheel that determines the ground height of the harvesting mechanism B, and the ground height of the harvesting mechanism B is obtained by rotating the hand handle 8 to harvest the idle front wheel 3. It can be adjusted by changing the height position of the mechanism B.

The harvesting mechanism B has two objects to be extracted.
Three weeding tools 9 located on the left and right sides of the row onion W to scoop up the leaf stems Wb, and three vertical rotation types located on the left and right sides of the two row onions W to be extracted A leaf-stem pulling device 10, a laterally-turning type leaf-stem scraping device 11 located behind the leaf-stem pulling device 10, a sandwiching-pulling and conveying device 12 located further behind it, and a landslide device 13 located near the starting end thereof.
A position aligning device 14 located below the sandwich pulling and conveying device 12, a leaf cutting cutter 15 located between the sandwich pulling and conveying device 12 and the aligning device 14, an attitude aligning device 16 located at the rear of the aligning device 14, Are equipped with.

Each weeding tool 9 is used in the open field specification, and the case 21 of the corresponding leaf stem pulling device 10 is used.
It is removably equipped with.

Each leaf stem pulling device 10 is capable of undulating a large number of locking claws 23 on a chain 22, which is an example of an endless rotation band which is wound between sprockets provided above and below a case 21 and is vertically driven. And the locking claw 23 is moved forward and obliquely rearward and upward from the vicinity of the ground in a forward posture in which the locking claw 23 projects toward the traveling direction of the machine body, whereby the leaf stems of the onion W scooped up by each weeding tool 9 are connected. It is configured to raise Wb, and is arranged so as to act on both left and right sides of each of the two onions W.

Each locking claw 23 is detachably connected to a base end portion 23A made of a hard resin, which is connected to the chain 22 so as to be able to rise and fall, and a tip end portion 23B made of an elastically deformable rod-shaped soft resin. The tip portion 23B is elastically deformed when it comes into contact with the flat ridges.

The drive of each leaf stem pulling device 10 will be described. The work power output part 2 provided at the front part of the transmission 5 is described.
4, a PTO shaft 26, whose power transmission is interrupted via a PT0 clutch 25, is horizontally mounted, and a front end of a forward transmission shaft 27 extending forward from the left end of the PTO shaft 26,
A lateral transmission shaft 28 for driving the leaf stalk pulling device is horizontally mounted,
Each of the leaf stem pulling devices 10 is driven by the lateral transmission shaft 28.

Incidentally, each of the leaf stem pulling devices 10 is constructed so that the posture can be changed around the lateral transmission shaft 28.

The leaf-stem scraping device 11 has a large number of locking claws 33 connected to a belt 32 that is wound between pulleys provided above and below a case 31 and driven to rotate laterally. The leaf stem Wb of the onion W is configured to be scraped up by moving it obliquely upward and rearward from the vicinity of the ground in a posture of projecting laterally. The locking claws 33 of 2 are arranged so as to be overlapped with each other and pulled up by the leaf stem pulling device 10.
After the leaf stems Wb of the striped onion W are scraped from the left and right at the starting ends of the belts 32, they are scraped upward and rearward.

That is, the leaf-stem scraping device 11 has the locking claw 3
The leaf stem Wb is scraped up by the lateral movement of 3 so that the leaf claw Wb facing in the front-rear direction is largely intersected with the leaf claw Wb so that the leaf stem Wb is reliably latched. Therefore, even if the leaf stem Wb cannot be pulled up by the leaf stem pulling device 10, the leaf stem Wb is corrected by the leaf stem pulling device 10 to a forward tilted posture, Wb can be surely given a scraping action by the stem shoot scraping device 11,
As a result, all the leaf stems Wb can be scraped up without fail.

The nipping and pulling and conveying device 12 comprises a pair of left and right wide nipping belts 34, which are wound between upper and lower pulleys and are laterally driven so as to face each other. The two onions W on the flat ridge are strongly pinched by the left and right clamping belts 34 and the leaf stems Wb of the two onions W scraped up by
Is configured to be lifted and hanged and conveyed upward and rearward.

The PTO shaft 26 to the worm speed reduction mechanism 3
6 and the power transmitted via the chain type transmission mechanism 37 drive the left side holding belt 34 in the holding and pulling and conveying device 12, and also the left side holding belt 34.
The belt 32 on the left side of the leaf stem scraping device 11 is driven by the power taken out from the front end of the stalk, and the power is transmitted through the power transmission shaft 38 which is interlockingly connected to the middle of the chain type power transmission mechanism 37. The right holding belt 34 of the transport device 12 is driven, and the right belt 32 of the leaf stem scraping device 11 is driven by the power taken out from the front end of the right holding belt 34.

The position aligning device 14 is used in the open-air specification, and is constructed by arranging a pair of left and right guide belts 47, which are wound between front and rear pulleys and driven laterally, to face each other. It is installed almost horizontally. Therefore, the distance between the position aligning device 14 and the sandwiching and pulling and conveying device 12 above it is larger toward the rear side in the transporting direction, and the leaf and stem Wb is sandwiched by the sandwiching and pulling and conveying device 12 and conveyed obliquely rearward and upward. Introducing the leaf stem Wb of the onion W between the left and right guide belts 47, the onion main body Wa, which is about to be pulled upward by the holding and pulling and conveying device 12, is received by the lower surface of the guide belt 47, and further moves upward. Is prevented, the height of the onion body Wa is made uniform. In addition, this alignment device 14
The left and right guide belts 47 in the
Are driven by the power taken out from the rear ends of the left and right belts 32 in FIG.

The squeezing force of the foliage by the left and right squeezing belts 34 in the squeezing and pulling and conveying device 12 is the onion W from the field.
It is set so that it becomes stronger on the front end side of the conveyance where the lifting is performed, and becomes weaker in the conveyance region where the height of the onion body Wa is made uniform by cooperation with the position aligning device 14, so that the position aligning device 14 causes upward movement. The blocked stem Wb of the onion W is pulled out relatively downward from the holding and pulling and conveying device 12.

The leaf cutter 15 is also used in the open field specification, and is a single disk equipped at the front ends of a pair of chain type transmission mechanisms 48 and 49 which are continuously connected from the PTO shaft 26 so as to be bendable and extendable. It is composed of a cutter and can be vertically adjusted along the linear slide guide mechanism 50. Therefore, the stem Wb of the onion W in which the heights of the onion body Wa are aligned by the alignment device 14
By cutting off and adjusting its action position,
The length of the leaf stem Wb left uncut on the onion body Wa can be adjusted.

The landslide device 13 is a holding and pulling and conveying device 1
It makes it easier to pull out the onion W from the flat ridge by 2 and has an L-shape when viewed from the front so that it can enter from near the ridge hem and from the upper surface of the flat ridge to below the two onions W on the right side in the machine traveling direction. It is composed of a pair of left and right bent soil demolition bodies 41. Each soil crushing body 41 is pivotally supported on the front part of the machine body frame 9 so as to be capable of swinging back and forth around a fulcrum P1, and an extension end above the eccentric crank part 43 provided at the right end of the PTO shaft 26. The rod 44 is interlocked and connected, and the rod 44 is pushed and pulled through the eccentric crank portion 43, and the soil smashing body 41 swings back and forth around the fulcrum P1 with a constant small stroke to remove the soil below the onion W. By collapsing and swelling, the onion W, which the leaf-stem Wb is nipped and pulled up by the nip-pulling and conveying device 12, can be pulled up without difficulty.

The posture aligning device 16 is used in the open-air specification, and is provided on the trailing end side of the position aligning device 14 with the transport path sandwiched between the guide bar 51 and the guide plate 5.
2 and a belt 53 with a protrusion that is driven by power taken out from the end of the left guide belt 47. After the leaves are cut, the uncut leaves stem Wb is the left and right guide belts 47.
The onion body Wa sandwiched by and conveyed backward is corrected by the guide bar 51 and the guide plate 52 into a sideways posture for easy recovery and forcedly discharged onto the flat ridge.

The open-field onion harvester is configured as described above, and in contrast to the four rows of onion W that are cultivated on the flat ridges in the open field, the two rows of onion W on the right side in the direction of travel by one stroke advance. The leaves are removed and subjected to a leaf cutting process with a predetermined length, and the leaves are left on the flat ridge in a sideways posture for easy collection.

By the way, the onions W that have been cut into leaves and left on the flat ridges can be collected manually or by a collecting machine.

Next, a multi-specific onion harvester will be described with reference to FIGS.

Devices and components having the same structure as those of the open-air specification of the multi-specific onion harvester are designated by the same reference numerals as those of the open-air specification and their description is omitted.
Hereinafter, only the configuration different from that of the open-air specification onion harvester will be described.

In the harvesting mechanism B, the weeding tool 9 is removed from the case 21 of each leaf stem pulling device 10 in order to avoid the damage of the multi-sheet F by the weeding tool 9, and instead, the slope of the flat ridge is used. By equipping the vertically-rotating type leaf stem lifting device 10 that acts on the collapsed leaf stem Wb, a total of four leaf stem lifting devices 10 are provided, and each of these leaf stem lifting devices 10 is installed.
Is driven by a lateral transmission shaft 28.

By the way, when the flat ridges are covered with the multi-sheet F, naturally the sheet portion covering the ridge hem is covered with soil and the sheet portion covering the space between the left and right central onions is also covered. It is common practice to prevent climbing. Further, in this case, if the sheet portion covering the space between the onions in the left and right centers is simply covered with soil, the soil at that portion is easily washed away by rain and wind, and the multi-sheet F is likely to roll up. In order to prevent the occurrence of defects, a groove is formed in the left and right center of the flat ridge top surface in advance, and the seat part located on this groove is covered with soil, so that the soil at that place can be easily exposed to rain and wind. It is also common practice to prevent it from being thrown away. In other words, in the multi-sheet F, when the flat ridges are covered, the sheet portion that covers the space between the onions in the left and right center that is prevented from rolling up by soil is the space between the onions on the left and right sides that is not protected by rolling up by soil. It is designed to sink more than the seat part that covers.

Therefore, in each of the leaf stem pulling devices 10, the first leaf stem pulling device 10A that acts on the leaf stem Wb that has fallen into the sheet portion that covers the space between the right and left center onions in which the multi-sheet F is prevented from rolling up. The tip of the locking claw 23 is different from that of the second leaf stem pulling device 10B that acts on the leaf stem Wb that has fallen into the sheet portion that covers the space between the onions on the left and right sides where the multi-sheet F is not rolled up. The posture of the leaf stem pulling device 10 is changed to an upright posture in which the leaf stem pulling locus k drawn at the lower end portion is lowered.

As a result, for the leaf stem Wb which has fallen into the sheet portion covering the space between the onions at the center of the left and right, which is in a state of sinking more than the sheet portion covering the space between the left and right onions in the multi-sheet F, the first leaf Even if the locking claw 23 of the stem pulling device 10A is in a state in which the soil for curling up is blown away by rain wind and the leaf stem Wb sinks, the leaf stem W
When scooping up b, it works in a suitable state in which lifting of the tip is avoided, and both sides on the left and right sides of the multi-seat F, which are in a state of being lifted up from the sheet part covering the space between the onions in the left and right center. With respect to the leaf stem Wb that has fallen into the sheet portion that covers the space between the onions, the locking claw 23 of the second leaf stem lifting device 10B pierces the multi-sheet F and pulls up the multi-sheet F together with the leaf stem Wb. The operation is performed in a suitable state in which the occurrence of

On the other hand, the third leaf stem pulling device 10C acting on the leaf stem Wb lying down on the furrow shoulder is the second leaf stem pulling device 1
The fourth leaf stem pulling device 10D, which is set to have the same height position of the leaf stem pulling locus k as 0B and acts on the leaf stem Wb lying on the slope of the flat ridge, is the other leaf pulling device. The leaf stem pulling locus k is lower than that of 10A to 10C, and the long stem having a large tilt angle is located at the front.

As a result, with respect to the leaf stem Wb which has fallen into the ridge shoulder, the locking claw 23 of the third leaf stem lifting device 10C is lifted from the ridge shoulder or pierced into the sheet portion covering the ridge shoulder to leave the leaf. The multi-sheet F is pulled up together with the stem Wb, and the multi-sheet F is actuated in a suitable state, and the fourth stem pull-up is performed for the leaf stem Wb lying on the slope of the flat ridge. The locking claw 23 of the device 10D acts in a suitable state in which the occurrence of the problem of being lifted from the slope or being pierced by the sheet portion covering the slope and pulling up the multi-sheet F together with the leaf stem Wb is avoided. It has become.

First to third leaf stem pulling devices 10A to 10C
The specifications of each locking claw 23 are changed from the open-air specification to the multi-specification. The specification change is that the tip 23B for the open-air is formed in a rod shape with a soft resin material that is elastically deformable (FIG. 27).
Is a soft resin material that can be elastically deformed, and the tip portion 2
3a has a wide spatula shape and can be replaced by a mulching tip portion 23C formed so as to have an upwardly curved shape in a front view in a leaf stem pulling up posture.

Each locking claw 23 of the fourth leaf stem lifting device 10D
Is a soft resin material that is elastically deformable at the base end portion 23A of the locking claw 23 that is adopted in the other leaf stem pulling devices 10A to 10C. Part 2
3a is a spatula-shaped tip portion 23 for a mulch that is formed so as to have an upwardly curved shape when viewed from the front in a leaf stem pulling action posture.
By detachably connecting D, the tip end side is in an inward posture toward the inside of the flat ridge, and another leaf stem pulling device 1
It is configured to be longer than the locking claw 23 provided in 0A to 10C.

That is, the tip portions 23C, 23 for mulching are used.
D is formed such that the tip end portions 23a thereof are in the shape of a spatula in which a hip breaking phenomenon is likely to occur, but the front view in the leaf stem pulling-up posture is an upwardly curved shape, so that the locking claw 23 moves forward. At the time of the leaf stem pulling action projecting toward the front, each locking claw 23 can be maintained in a suitable leaf stem pulling posture in which the whole thereof extends forward, while the tip of each locking claw 23 is a multi-sheet. At the time of the leaf stem scooping action in contact with F, only the contact end side of the tip end portion 23a of each tip end portion 23C, 23D is easily bent and deformed, and the reaction force of the elastically deformed locking claw 23 that acts on the multi-sheet F. Therefore, the number of leaf stem pulling devices 1 can be reduced without causing damage to the multi-sheet F by the locking claws 23.
By 0A to 10D, the leaf stem Wb can be reliably and satisfactorily scooped up and pulled up.

Further, the fourth leaf stem lifting device 10D acting on the leaf stem Wb lying on the slope of the flat ridge has the locking claw 23.
However, on the slope of the flat ridge, the leaf stem Wb is tilted so as to intersect with the advancing direction of the airframe and the leaf stem Wb is inclined so as to be along the advancing direction of the airframe. Therefore, the leaf stem Wb lying on the slope of the flat ridge can be reliably picked up and pulled up regardless of their postures, and further, the locking claw 23 thereof is
Since the length is longer than the locking claws 23 of the other leaf stalk pulling devices 10A to 10C that act on the leaf stalk Wb lying on the upper surface of the flat ridge, the case 21 and the multi-seat F are in a state of being lifted. It is possible to increase the distance from the slope easily, whereby the multi-sheet F lifted from the slope of the flat ridge is damaged by the contact with the case 21 of the fourth leaf stem pulling device 10D, and the damaged portion is affected. It is possible to avoid the occurrence of the problem of being caught by the stop claw 23 and being caught in the fourth leaf stem lifting device 10D.

In short, from the above structure, the scooping up and pulling up of the stems Wb, which have fallen in various states along the shape of the flat ridges, causes damage to the multi-sheet F by the corresponding stems pulling device 10. It is possible to perform reliably and satisfactorily without using the leaf stem Wb, so that it is possible to easily and reliably pull up the onion W from the flat ridge using the leaf stem Wb in the multi-sheet F and cut the leaf stem Wb. Also, the multi-sheet F is damaged and the leaf stem pulling device 10
It is possible to effectively avoid the interruption of work due to the problem of being caught in the work, thereby improving the certainty of work and work efficiency.

A leaf cutting device 60 for mulching for cutting the leaf stem Wb of the onion W which has been started to be sandwiched and conveyed by the sandwiching and pulling and conveying device 12 is provided below the starting end portion of the sandwiching and pulling and conveying device 12. This mulching leaf cutting device 60
Are the left and right guide belts 47 that form the alignment device 14.
From the front pulley 39 wound around the
The left and right disk-shaped rotary blades 62 are configured to rotate inwardly with each other by the power transmitted via the.

Below each rotary blade 62, a rubber-made scraping rotary body 63 that rotates integrally with the corresponding rotary blade 62 is provided. A plurality of (six in the figure) scraping protrusions 64 are arranged at a large pitch on the outer peripheral surface of each scraping rotor 63.
Is protruded, and the leaf stem Wb of the onion W, which is about to be introduced into the leaf cutting device 60, is locked from the left and right and scraped backward, so that it is sent to the cutting site of the left and right rotary blades 62. There is. Here, the rotary blade 62 is driven at a higher speed by transmission through the chain type transmission mechanism 61, and the scraping rotor 63 is also rotated at a higher speed accordingly. From this configuration, the peripheral speed of the scraping rotary member 63, that is, the backward conveying speed by the scraping rotary member 63, is determined by the clamping and pulling transport device 12 and the alignment device 1.
It is set so as to be faster than the backward conveying speed of No. 4.

The multi-leaf cutting device 60 is constructed so that it can be easily attached to and detached from the machine body. The structure thereof will be described. Chain type transmission mechanism 6 for driving the rotary blade
The left and right transmission cases 70 in FIG. 1 are integrally connected by a frame plate 71, and rear end bent portions 72a of a connecting arm 72 extending rearward from the left and right ends of the frame plate 71 are provided on the left and right sides of the machine body frame 9. It is adapted to be engaged with the recess 73a of the metal fitting 73 from the front and to be connected by bolts to the body frame 9 with connecting portions 74 which are raised from the left and right of the frame plate 71. Further, a transmission plate 76 is provided on an upper end of the input shaft 75 protruding upward from each transmission case 70, and a transmission hole 77 formed in the transmission plate 76 is provided on a lower surface of the front pulley 39 in the alignment device 14. A pair of transmission pins 78 that mate with each other are provided so as to project, and a leaf cutting device 60 for mulch
Is connected to the machine body frame 9 via the connecting arm 72 and the connecting portion 74, whereby the front pulley 39 and the input shaft 75 are pin-interlocked with each other, and the bolt connection of the connecting portion 74 is released to thereby connect the connecting arm. By detaching 72 from the connecting fitting 73, it is possible to easily remove the entire mulch leaf cutting device 60. By providing the handles 79 on the left and right of the frame plate 71, the mulch leaf cutting device 60 can be easily attached and detached.

A guide mechanism 80 for preventing the onion main body Wa pulled out from the planting hole h of the multi-sheet F from being cut by the rotary blade 62 is provided below the mulch leaf cutting device 60. ing. The guide mechanism 80 is configured by arranging three guide rods 81, whose free ends are bent upward, in parallel in the left and right in front of the cut portions of the left and right rotary blades 62. When the onion body Wa of the onion W having the leaf stem Wb sandwiched therebetween is pulled out from the planting hole h of the multi-sheet F and approaches the cutting site of the multi-leaf cutting device 60, the onion body Wa is moved upward by the guide rod 81. It is guided and climbs up onto the nip-pulling and conveying device 12, and is conveyed to the upper rear as it is. Guide rods 84 that guide the leaf stem Wb to the cutting site are arranged and fixed in a front-spreading manner on the left and right outer sides of the guide rod 81 group.

Of the three guide rods 81, the left and right guide rods 81 are cantilevered forward from a support plate 83 attached to the rear portion of the frame plate 71 so that the front and rear positions can be adjusted, and the central guide rod 81 is also provided. 81 is a left and right guide rod 81
And is extended above the left and right guide rods 81. In this way, the guide mechanism 8
Since 0 is arranged below the rotary blade 62, even if the onion W having the leaf stem Wb clamped by the clamping and pulling / conveying device 12 is pulled up together with the multi-sheet F, the guide rod 81 is multi-threaded. The upper surface of the sheet F is received to prevent the sheet F from rising further, so that the onion body Wa and the multi-sheet F can be prevented from coming into contact with the rotary blade 62. By adjusting the position of the support plate 83 back and forth, it is possible to adjust the entire guide rod 81 back and forth with respect to the cutting site. Therefore, depending on the field conditions, the growth state of the onion W, etc. The optimum guide position can be set and used.

As described above, by mounting the guide mechanism 80 on the mulch leaf-cutting device 60 constructed as described above, the mulch leaf-cutting device 60 and the guide mechanism 80 are mounted.
And can be handled as a unit that can be detached.

The landslide device 13 cuts off the soil around the onion body Wa left in the flat ridges so that it can be easily pulled up and collected later.
The earth smashing body 41 and the earth smashing body 4 which are bent in an L shape when viewed from the front so as to enter even below the onion W of the strip.
1 is composed of an auxiliary tool 42 for turning up the sheet, which protrudes near the ridge at a position slightly outside of the position just before 1, and the earth smashing and demolition body 41 is pivotally movable around the fulcrum P1 in the front part of the machine body frame 9. While being supported, the extending end above it and the eccentric crank portion 43 provided at the right end of the PTO shaft 26 are linked and coupled by a rod 44, and the rod 44 is pushed and pulled through the eccentric crank portion 43 to drive the soil. The smashing body 41 swings back and forth around the fulcrum P1 with a constant small stroke to collapse the soil below the onion W and to soften the onion W.
Can be pulled up without difficulty.

The auxiliary member 42 for turning up the sheet is pivotally supported about the fulcrum P2 so as to be able to swing back and forth, and is also interlocked with the earth smashing body 41 through the linking rod 45 to swing the earth smashing body 41 back and forth. It is designed to be rocked back and forth in synchronism with the motion, and by moving forward while cutting near the ridge, it reduces the resistance of the subsequent soil smashing body 41 to dig into the soil, and at the same time, the ridge The right side hem of the multi-seat F hung on the side is pushed up a little and turned up to move forward. In this manner, the right side hem of the multi-seat F is freed by the sheet turning-up auxiliary tool 42 so that the turning up is easy,
The following multi-sheet F can be smoothly turned up smoothly by the soil crushing body 41. Also, from the auxiliary tool 42 for turning up the sheet, the auxiliary tool 4
Multi-sheet F scooped up by 2 Soil crushed hem 4
Guide up to 1 and the multi-sheet F is the soil crushing body 41
A sheet guide portion 46 is provided so as to prevent the sheet guide portion 46 from being caught by.

After the airframe has passed while cutting leaves in this way, the short-cut uncut leaves Wb are multi-sheets F.
The multi-sheet F can be easily flipped up without being hindered by the leaf stem Wb. Then, when the multi-sheet F is turned off, shortly cut onion main bodies Wa are lined up on the flat ridge in a state of being lifted, and this may be collected.

The multi-specific onion harvester is configured as described above, and with respect to the four onions W cultivated on the flat ridges covered with the multi-sheet F, it advances in one stroke to the right in the traveling direction. Cutting of the stem Wb in the two-row onion W and lifting of the onion body Wa are performed, and by making one reciprocating movement, cutting of the leaf stem Wb and lifting of the onion body Wa in all the onions W of four rows of ridges. The multi-sheet F is then removed by winding and turning it up to expose the flat ridges, which are left on the flat ridges in a leaf-cut state. The onions W are collected manually or by a collecting machine.

By the way, at the lower end of the first leaf stem lifting device 10A, a ground roller 55 which rolls on the multi-sheet F and detects a variation in seat height with respect to the first leaf stem lifting device 10A is swayed. The swing arm 5 is provided so as to be vertically displaceable with respect to the first leaf stem lifting device 10A via the moving arm 56.
6, the upper end of the first leaf stem pulling device 10 extends upward.
The engaging claw 23 of each leaf stem pulling device 10 is inserted into the support guide tool 57 mounted on the upper part of A, and the displacement of the mark 58 marked on the upper end portion with respect to the support guide tool 57 causes the locking claw 23 of each leaf stem pulling device 10 to move. A marking rod 59 for facilitating visual confirmation from the maneuvering position whether the vehicle is positioned at an appropriate height position with respect to
Is extended, and based on the displacement of the mark 58 with respect to the support guide 57, the hand handle 8 is rotated to change the height position of the harvesting mechanism B with respect to the idle front wheel 3,
The locking claw 23 of each leaf stem pulling device 10 can be easily positioned at an appropriate height position with respect to the multi-sheet F.

As shown in FIGS. 7 to 10, 12 and 27, the base end portion 23A of each locking claw 23 is a sheath portion for externally fitting and holding the base end portion 23b of the attached tip end portions 23B to 23D. 23c is formed. That is, the distal end portion 23 is made up of the sheath portion 23c of the base end portion 23A made of a hard resin material.
Since the base end portions 23b of B to 23D are fitted and held,
Irrespective of the open-field specification and the multi-specification, unnecessary elastic deformation at the base end portion 23b of the tip end portions 23B to 23D at the time of scooping up and pulling up the leaf stem Wb can be suppressed, and the tip end portion 23B to 23D can be easily maintained in an appropriate posture that suitably acts on the leaf stem Wb, and thus the leaf stem Wb can be scooped up and pulled up by each locking claw 23 more reliably and satisfactorily.

In each locking claw 23, the distal end portions 23B to 23D are prevented from coming off from the proximal end portion 23A with respect to the proximal end portion 23A.
A pair of opposite side surfaces 23ca of the sheath portion 23c of the
While being inserted into the through holes a and b formed in the upper surface 23ca and the lower surface 23cb which are 23cb and the through hole c formed in the base end portion 23b of the distal end portions 23B to 23D,
A reduced diameter portion 90a that is reduced in diameter when it is inserted into each of the through-holes a to c at its tip end, is expanded in diameter after insertion, and is locked in the recess d of the lower surface 23cb.
90A of the insertion part and the upper surface 23ca of the sheath part 23c at the time of expanding the diameter of the expansion / contraction part 90a after insertion into the through holes a to c.
Head 90B that engages with the through hole a and the recessed portion e of the above and abuts on the recessed portion e and the base end portion 23b of the tip end portions 23B to 23D.
It is configured to be performed by the locking pin 90 formed so as to have The locking pin 90 grips the peripheral edge portion 90b of the head portion 90B exposed from the base end portion 23A of the locking claw 23 and rotates relative to the base end portion 23A around its axis, and the expanded portion thereof. The diameter of 90a is reduced, and the lower surface 23cb is unlocked from the recess d so that the lower surface 23cb can be pulled out from the locking claw 23.

With this structure, when the specification of the locking claw 23 is changed and the repair is performed according to the damaged state of the tip portions 23B to 23D of the locking claw 23, the case 21 of the leaf stem pulling device 10 is used. The connection between the chain 22 in which the connection point is hidden and the base end 23A of the locking claw 23 is left as it is, and the locking pin 90 is pulled out and inserted to the case 2 of the leaf pulling device 10.
Since it is only necessary to replace the base end portion 23A of the tip end portions 23B to 23D exposed from No. 1, it is possible to significantly reduce the labor and cost required for the replacement as compared with the case of replacing the entire locking claw 23. It is like this.

Moreover, the base end portion 23A by the locking pin 90
Is connected to the tip end portions 23B to 23D with respect to
By the sheath portion 23c of the proximal end portion 23A, the distal end portions 23B-2
Since the elastic deformation of 3D is prevented, the reaction force when the distal end portions 23B to 23D elastically deform is the locking pin 9.
Therefore, it is not necessary to make the locking pin 90 strong enough to withstand the reaction force when the tip portions 23B to 23D of the locking claw 23 are elastically deformed. Therefore, the durability can be improved while adopting a relatively inexpensive locking pin 90.

[Other Embodiments] Other embodiments of the present invention will be listed below. [1] The root vegetable harvester may be a carrot harvester, a radish harvester, a garlic harvester, or the like. [2] As the locking claw 23, a hard resin base end 23A
Alternatively, the tip end portions 23B to 23D made of soft resin may be non-detachably connected, or the base end portion 23A may be formed of a metal material such as aluminum. [3] As the locking pin 90, as shown in (a) of FIG. 30, in order to facilitate the rotation operation around the axis thereof,
The head 90B is provided with a recess 90c for operating by pressing a finger.
Formed on the upper surface of the, as shown in FIG.
A head 90B having a peripheral portion 90b formed with irregularities for preventing slippage, a head 90B having an upper surface provided with a projection 90d for picking operation as shown in FIG. Although omitted, the head 90B may have a recessed groove formed on the upper surface thereof so as to be operated by a coin or the like. [4] In order to facilitate the unlocking of the expanded and contracted portion 90a of the locking pin 90 around the axis and the recessed portion d of the sheath portion 23c of the locking claw 23, FIG. As shown in FIG. 5, a cam surface f that reduces the diameter of the expanded portion 90a is formed in the concave portion d of the sheath portion 23c in accordance with the relative rotation of the locking pin 90 with respect to the locking claw 23 around its axis. Alternatively, a cam surface g that reduces the diameter of the expanded portion 90a with the relative rotation of the locking pin 90 with respect to the locking claw 23 about its axis may be formed on the expanded portion 90a. Good.

[Brief description of drawings]

[Figure 1] Overall side view of a multi-spec root vegetable harvester

[Figure 2] Overall plan view of a multi-spec root vegetable harvester

[Figure 3] Overall front view of a multi-spec root vegetable harvester

[Fig. 4] Side view of multi-spec harvesting mechanism

FIG. 5 is a plan view showing the front part of the multi-specific harvesting mechanism.

FIG. 6 is a front view showing a part of the multi-specific harvesting mechanism.

FIG. 7 (a) is a plan view showing the configuration of the locking claws of the multi-specification first to third leaf stem lifting devices. (B) The configuration of the locking claws of the multi-specification first to third leaf stem lifting devices. Vertical side view showing

FIG. 8 (a) is a plan view showing the structure of the locking claws in the multi-specific fourth leaf stem lifting device, and (b) is a vertical cross-sectional side view showing the structure of the locking claws in the multi-specific fourth leaf stem lifting device.

FIG. 9 is a vertical sectional front view showing the structure of the locking claws.

FIG. 10 is a bottom view of the locking claw base end portion.

FIG. 11 is a vertical sectional view of the tip of the locking claw.

FIG. 12 is an exploded perspective view showing a structure of a locking claw in a multi-specification fourth leaf stem lifting device.

[Fig. 13] Side view of multi-specific landslide device

FIG. 14 is a side view of an essential part showing a state where the locking claws are in contact with the multi-seat.

[Fig. 15] Transmission system diagram for multi-specification

FIG. 16 is a plan view of a leaf cutting device for mulch.

FIG. 17 is a front view of a leaf cutting device for mulch.

FIG. 18 (a) A side view showing a state in which the mulch leaf-cutting device is attached (b) A side view showing a state in which the mulch leaf-cutting device is removed

FIG. 19 is a side view showing a transmission structure of a leaf cutting device for a mulch.

FIG. 20 is a side view showing the function of the guide mechanism.

[Fig. 21] Overall side view of an open-air root vegetable harvester

[Fig. 22] Overall plan view of a root crop harvester with open-air specifications

[FIG. 23] Overall front view of an open-air root vegetable harvester

[Fig. 24] Side view of a harvesting mechanism with open-field specifications

FIG. 25 is a plan view showing the front part of a harvesting mechanism for open field specifications.

FIG. 26 is a front view showing a part of the open-field specification harvesting mechanism.

FIG. 27 is a vertical cross-sectional side view showing the structure of an open-ended locking pawl.

[Fig. 28] Side view of the landslide device with open-air specifications

[Fig.29] Transmission system diagram for open-air specifications

FIG. 30 is a perspective view showing another embodiment of the locking pin.

FIG. 31 is a bottom view of the essential part showing another embodiment in which a cam surface is formed in the sheath portion or the expansion / contraction portion.

[Explanation of symbols]

10 Leaf stem pulling device 10A leaf stem pulling device 10B Leaf stem pulling device 10C leaf stem pulling device 10D leaf stem lifting device 22 Endless rotation band 23 Locking claw 23A base end 23B tip 23C tip 23D tip 23a Tip part 23b Base end part 23c sheath part 23ca side 23cb side 90 locking pin 90a Expanded portion 90A insertion part 90B head F multi-sheet W root vegetables Wb leaf stem a through hole b Through hole c Through hole f Cam surface g Cam surface h Planting hole

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor, Ito             64 Ishizukitamachi, Sakai City, Osaka Prefecture Kubo Co., Ltd.             Ta Sakai Factory (72) Inventor Takao Osakatsuji             64 Ishizukitamachi, Sakai City, Osaka Prefecture Kubo Co., Ltd.             Ta Sakai Factory F term (reference) 2B072 AA03 AA04 AA10 BA02 BA21                       BA30 CA12 DA02 DA05 DA12

Claims (5)

[Claims] 1. A root vegetable harvester for harvesting root vegetables attached to ridges, which is located on both sides of the root vegetables to be harvested, and which protrudes from a planting hole of a multi-sheet hung on the ridges. The roots of the root vegetables, equipped with a plurality of leaf stem pulling device to pull up by the vertical movement of the locking claw, among these plurality of leaf stem pulling device, acting on the leaf stem that has fallen to the slope of the ridge The locking claw provided in the leaf stem pulling device is provided in a leaf stem pulling device that acts on a leaf stem that has its tip end side facing inward of the ridge, and that has fallen on the upper surface of the ridge. The leaf stem pulling structure is formed so that the length is longer than the locking claw. 2. The leaf stem lifting structure according to claim 1, wherein an elastically deformable resin material is used for a tip portion of the locking claw, and the tip portion is formed in a spatula shape. 3. The locking claw is configured to be divided into two parts, a base end part connected to an endless rotation band and the tip end part, and the base end part is made of a hard material to form a base of the tip end part. 3. A sheath portion formed so as to hold the end portion by external fitting.
The structure for pulling up the leaf stems of the described root vegetable harvester. 4. A through hole formed in each of a pair of opposite side surfaces of the sheath portion and a through hole formed in the base end portion, and at the time of inserting the through hole into each of the through holes. An insertion portion having a reduced diameter portion that is reduced in diameter and expanded and then locked to the side surface, and a head that abuts against the side surface when the reduced diameter portion is expanded after being inserted into each of the through holes. The locking pin formed so as to have a structure for preventing the distal end portion from coming off from the base end portion.
The structure for pulling up the leaf stems of the described root vegetable harvester. 5. A cam surface is formed on the sheath portion or the expanded / contracted portion to reduce the diameter of the expanded / contracted portion as the locking pin rotates relative to the base end portion about its axis. The leaf stem lifting structure according to claim 4, which is a root vegetable harvester.