JP2012000057A - Stem cutting apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To cut an upper part of a crop stalk first and to cut a lower part of the stalk.
SOLUTION: A lower cutting mechanism 5 for cutting a lower part of a stem S1 of a root vegetable crop S by rotating a lower rotary blade 4 on a frame 3 mounted on a mobile body 2, and an upper rotary blade 6 as a lower rotary blade 4 An upper cutting mechanism 7 that rotates in the same direction and cuts the upper portion of the stem S1 and a drive mechanism 9 that drives the upper and lower cutting mechanisms 5 and 7 by power from the prime mover 8 are provided. The upper rotary blade 6 of the upper cutting mechanism 7 is arranged at the front upper side in the moving body 2 traveling direction from the lower rotary blade 4 of the lower cutting mechanism 5.
[Selection] Figure 1

Description

  The present invention relates to a stem cutting device for cutting a stem of a vegetated root vegetable crop.

  In the conventional technique for processing root vegetable crops vegetated in a field, as disclosed in Patent Document 1, the root vegetable crop is pulled out from the cocoon with a holding belt, and the stem is cut with a rotary blade while being transported. And is configured to release the stem to the side.

JP 2000-32823 A

The prior art can be applied to the harvesting of thin and weak crops such as garlic, lilies, tulips, etc. It is difficult to harvest crops, and it is difficult to convey a robust stem with a pinching belt.
Therefore, it is required to cut a strong stem in advance before harvesting a root crop, and it is required to make it easy to collect a part of the stem as a seed stem.

An object of the present invention is to provide a stem cutting device that solves the problems of the prior art and can meet the demands.
SUMMARY OF THE INVENTION An object of the present invention is to provide a stalk-cutting device that can cut an upper part of a crop stalk first and cut a lower part later.

Specific means for solving the problems in the present invention are as follows.
First, a lower cutting mechanism 5 that cuts the lower part of the stem S1 of the root vegetable crop S by rotating the lower rotary blade 4 on the frame 3 attached to the mobile body 2, and the upper rotary blade 6 as the lower rotary blade 4 An upper cutting mechanism 7 that rotates in the same direction and cuts the upper part of the stem S1, and a drive mechanism 9 that drives the upper and lower cutting mechanisms 5 and 7 by power from the prime mover 8,
The upper rotary blade 6 of the upper cutting mechanism 7 is arranged in front of and above the lower rotary blade 4 of the lower cutting mechanism 5 in the traveling direction of the mobile body 2.

According to this, the stem S1 of the cultivated crop S can be divided into an upper part and a midway part and cut in order from the top. Moreover, it will cut | disconnect from the upper part of the stalk S1 extended on the crop S, and it can discharge | release sideways efficiently.
Second, the drive mechanism 9 transmits power from the prime mover 8 to drive the lower cutting mechanism 5, and transmits power from the lower drive means 11 to the upper cutting mechanism 7 to transmit the upper cutting mechanism 7. And an upper driving means 12 for driving the motor.

According to this, the center of gravity of the entire apparatus can be kept low, and an inexpensive and efficient transmission mechanism can be obtained.
Thirdly, the upper drive means 12 has a transmission shaft 15 extending upward from the lower drive means 11 and an upper transmission means 16 for transmitting power from the upper part of the transmission shaft 15 to the front upper rotary blade 6. It is characterized by that.

According to this, the arrangement space for the transmission means to the upper transmission means 16 can be reduced in the front-rear direction, and the arrangement can be made without protruding largely from the mobile body 2 forward.
Fourthly, the upper cutting mechanism 7 is characterized in that the upper rotary blade 6 is provided on each of a pair of left and right upper rotary shafts 14 that rotate in the same direction in front of the lower rotary shaft 13 in plan view.
According to this, since it can cut in a wide area, it is suitable for cutting the stem S1 that spreads upward, and the upper part of the branched stem S1 is cut securely and cut while cutting. The stem S1 above the point can be discharged to the side by the upper rotary blade 6.

Fifth, the lower cutting mechanism 5 is characterized in that a lower rotary blade 4 is provided on one lower rotary shaft 13.
According to this, the lower rotary blade 4 of the single lower rotary shaft 13 can cut the lower part of the stem S1 reliably and efficiently, and can be discharged laterally.
Sixth, the prime mover 8 is disposed on the side of the lower rotary shaft 13 which is the front side in the cutting direction of the lower rotary blade 4, covers the front side in the moving body direction of the prime mover 8, and the stem S 1 after cutting A guide member 20 for guiding discharge is provided on the frame 3.

According to this, the prime mover 8 is installed on the side where the lower rotary shaft 13 is vacant so that the front-rear width of the apparatus can be made as small as possible. The guide member 20 covering the prime mover 8 allows the stem toward the prime mover 8 side. Intrusion of S1 can be prevented, and release of stem S1 after cutting can be guided.
Seventh, the lower cutting mechanism 5 is characterized in that a lower rotary blade 4 is provided on each of a pair of left and right lower rotary shafts 13 rotating in the same direction.

According to this, even if the crop S is vegetated in a staggered manner, the lower part of the stem S1 can be reliably cut without greatly steering the mobile body 2, and the middle of the stem S1 above the lower cutting point while cutting. Can be released to the lateral side with the right and left lower rotary blades 4.
Eighth, it is characterized by having a divider 22 that projects forward of the lower rotary blade 4 in the moving body traveling direction and guides the stem S1 from the opposite side of the cutting direction of the lower rotary blade 4 to the lower rotary blade 4.

According to this, the stem S1 can be guided to the lower rotary blade 4 from the direction opposite to the cutting direction of the lower rotary blade 4 in the traveling direction of the mobile body 2, and the branches and leaves protruding to the side can also be cut.
Ninth, a pair of left and right mower mechanisms 23 for cutting grass planted on the right and left of the root vegetable crop S are arranged at a central interval below the frame 3 and behind the lower cutting mechanism 5. The auxiliary transmission means 24 which transmits motive power from the said motor | power_engine 8 is provided in the right-and-left outer side of this.

 According to this, the right and left mower mechanism 23 can cut grass that grows on the left and right of the root vegetable crop S, and removes excess weeds that cause clogging in the cropping operation of the crop S at the same time as cutting and releasing the stem. Can be processed.

  ADVANTAGE OF THE INVENTION According to this invention, the stalk of the cultivated crop can be divided | segmented into an upper part and a middle part, and it can cut | disconnect in order from the top.

It is a whole side view showing a 1st embodiment of the present invention. It is the same whole top view. It is the same front view. It is the left side view. It is a cross-sectional side view of a lower cutting mechanism. It is a front view of a lower cutting mechanism. It is a top view of a lower cutting mechanism. It is a cross-sectional side view of an upper cutting mechanism. It is a top view of an upper cutting mechanism. It is a left view which shows 2nd Embodiment. It is a partial front view of a lower cutting mechanism and a mower mechanism. It is a whole side view which shows 3rd Embodiment. It is the same whole top view. It is sectional explanatory drawing of the same up-and-down cutting mechanism and mower mechanism.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In the first embodiment shown in FIGS. 1 to 9, a stem cutting device 1 </ b> A for cutting the stem S <b> 1 of the root vegetable crop S is mounted on a mobile body 2 such as a tractor so as to be movable up and down. A boom 28 is attached to the mobile body 2, a stem cutting device 1 </ b> A is attached to the tip of the boom 28, and the height of the stem cutting device 1 </ b> A is adjusted by a boom cylinder 30 provided between the boom 28 and the front guard 29. It is free.

A pair of left and right mounting tools 31 are connected to the left and right ends of the boom 28 via vertical pins 32, respectively, and a pair of left and right connecting tools 33 provided on the back surface of the bottom plate 3a of the frame 3 of the stem cutting device 1A. Are connected via two lateral pins 34.
A plurality of holes 31a through which the horizontal pins 34 are inserted are arranged in the mounting tool 31, and the connecting tool 33 has holes 33a through which the horizontal pins 34 are inserted, as shown in FIGS. A plurality of vertical circular arcs are arranged, and by inserting the horizontal pin 34 through the holes 31a, 33a and other holes that coincide with the central hole in the vertical direction, the connector 33 has an inclination angle determined by the selected hole. It is connected to the mounting tool 31.

The connecting tool 33 can be tilted back and forth by inserting only the lateral pin 34 into the center hole of both the holes 31a and 33a, and the connecting tool 33 is brought into a vertical posture according to the height of the tip of the boom 28, In this state, the second horizontal pin 34 is inserted into the matching holes 31 a and 33 a other than the central hole and connected to the mounting tool 31.
The height of the stem cutting device 1A is changed corresponding to the height of the pod planting the crop S and facing the height at which the stem S1 is to be cut, so that the stem cutting device 1A has the target height. Then, the height of the tip of the boom 28 is determined, and the angle with the mounting tool 31 is set so that the stem cutting device 1A is in a substantially vertical posture with respect to the field at that height.

  The stem cutting device 1A can cut the stem S1 of the crop S in two upper and lower stages. On the frame 3, a lower cutting mechanism 5 that cuts the lower part of the stem S1 and an upper cutting mechanism 7 that cuts the upper part of the stem S1. And a drive mechanism 9 that drives the upper and lower cutting mechanisms 5 and 7 with power from the prime mover 8. The upper rotary blade 6 of the upper cutting mechanism 7 is moved from the lower rotary blade 4 of the lower cutting mechanism 5 in the traveling direction of the mobile body 2. It is arranged on the front upper side.

  A gear case 35 is fixed on the bottom plate 3a of the frame 3 in the center in the left-right direction, and a motor 8 such as an engine or a hydraulic motor is disposed on one side of the gear case 35 on the left and right sides (in the embodiment, on the right side in the traveling direction of the mobile body 2). A lower belt transmission means 37 is provided between the prime mover 8 and the input shaft 35a of the gear case 35, and a pair of bevel gears 36 are provided between the input shaft 35a and the lower rotary shaft 13, These constitute the lower drive means 11.

Since the prime mover 8 is arranged side by side with the gear case 35 of the drive mechanism 9, it does not occupy the space in the front-rear direction on the bottom plate 3a of the frame 3, so that the front-rear dimension of the stem cutting device 1A can be shortened. ing.
In the lower cutting mechanism 5, one lower rotary shaft 13 is vertically arranged in a gear case 35 provided at the center in the left-right direction of the frame 3, and a flange plate 38 is provided at the lower end of the lower rotary shaft 13 projecting downward from the gear case 35. The lower blade mounting disk 39 is fixed to the lower surface of the flange plate 38 with bolts, and a plurality of circumferential rotating blades 4 (five in FIGS. 2 and 7) are provided on the lower surface of the lower blade mounting disk 39. Bolts are fixed.

The lower rotary blade 4 is formed with blade portions on the front and rear edges and the inner and outer edges of the rectangular plate in the rotational direction. The blade can be used for cutting.
The power from the prime mover 8 is transmitted from the input shaft 35a to the lower rotary shaft 13 via the pair of bevel gears 36, and the lower rotary blade 4 is rotationally driven in the clockwise direction in FIGS.

A support cylinder 21 is erected on the upper part of the gear case 35, and the upper part of the lower rotary shaft 13 and the transmission shaft 15 are supported and covered by the support cylinder 21. The transmission shaft 15 is concentrically connected to the upper end of the lower rotation shaft 13, and the upper portion of the transmission shaft 15 is rotatably supported on the upper portion of the support cylinder 21.
8 and 9, the rear portion of the transmission case 40 is fixed to the upper portion of the support cylinder 21. The transmission case 40 extends from the rear portion fixed to the support cylinder 21 to the left and right fronts in a substantially V shape in plan view. The upper rotation shaft 14 is rotatably supported at the left and right tip sides of the transmission case 40, respectively. The lower rotating shaft 13 and the front left and right upper rotating shaft 14 are triangularly arranged in plan view.

In the transmission case 40, an upper transmission means 16 formed of belt transmission means is provided between the upper part of the transmission shaft 15 and the upper part of the left and right upper rotation shaft 14, and rotates the left and right upper rotary blade 6 downward. It is rotationally driven in the same direction as the blade 4 (clockwise in plan view). The transmission shaft 15 and the upper transmission means 16 constitute an upper drive means 12 for driving the upper cutting mechanism 7.
An upper blade attaching disk 41 is detachably fixed to the lower ends of the upper rotating shafts 14, and a plurality of upper rotating blades 6 in the circumferential direction (three in FIG. 2) are disposed on the lower surface of the upper blade attaching disk 41. Is bolted. Therefore, the upper rotary blade 6 of the upper cutting mechanism 7 is arranged in front of and above the lower rotary blade 4 of the lower cutting mechanism 5 with respect to the traveling direction of the mobile body 2.

Since the left and right upper rotary blade 6 rotates in the opposite direction between the left and right upper rotary shafts 14, the left and right upper blade mounting disks 41 are shifted up and down, and the left and right upper rotary blades 6 do not interfere with each other.
A blade cover 43 that covers the front and left and right outer sides of the upper rotary blade 6 is provided at the lower part of the left and right front portions of the transmission case 40. The blade cover 43 includes an arc-shaped fixed cover 43A fixed to the transmission case 40, and a movable cover 43B provided on the fixed cover 43A so that the position in the arc direction can be adjusted.

  The movable cover 43B is superposed on the fixed cover 43A during the cutting operation to open the front of the upper rotary blade 6 and protrudes from the fixed cover 43A to close the front of the upper rotary blade 6 during the non-cutting operation. The right movable cover 43B opens not only the front side of the moving body 2 in the traveling direction of the upper right rotary blade 6 but also the right side, that is, the front side of the upper rotary blade 6 in the cutting direction at the time of cutting work, and does not disturb the discharge of the cut stem S1. It is like that.

A support member 44 having a substantially V shape in plan view for supporting the front and rear halfway portion of the transmission case 40 is provided at the upper portion of the support tube 21, and a divider 22 is provided on the front side in the middle portion in the vertical direction of the support tube 21. ing.
As shown in FIGS. 1 and 2, the divider 22 is formed of a pipe material, a bar material, or the like, and a main rod 22A that is inclined forward and downward from the support cylinder 21 to the left and right sides (left side), and the main rod 22A. And a guide rod 22B extending rearward from the front portion and above the main rod 22A and extending to the left and right center side, in front of the moving body 2 in the traveling direction and opposite to the cutting direction of the lower rotary blade 4 The stem S1 can be guided from the side to the lower rotary blade 4 and the upper rotary blade 6.

1 to 4, front and rear strut members 3b are erected on the frame 3 from the left and right sides of the bottom plate 3a, and the release of the stem S1 after cutting is guided using the bottom plate 3a and the front and rear strut members 3b. A guide member 20 and a defense member 45 for preventing the scattering of debris are provided.
The guide member 20 is configured by connecting a top and bottom three horizontal pipe members with a plurality of vertical pipe members to form a guide frame 20a, and attaching a net member 20b to the guide frame 20a.

The guide member 20 is attached to the bottom plate 3a and the front strut member 3b, and is disposed between the upper and lower rotary blades 4 and 6, and is substantially U-shaped in plan view, in front of the prime mover 8 and the drive mechanism 9, and The left side is covered and guided so that the cut stem S1 is released to the side while preventing the intrusion of the stem S1.
The guide member 20 may be formed in a substantially L shape in plan view and attached to the left and right ends of the bottom plate 3a, and at least on the front side in the cutting direction of the lower rotary blade 4 so as to guide the discharge of the stem S1 after cutting. It only has to be arranged.

The defense member 45 is attached to the rear strut member 3b and disposed on the back surface of the stem cutting device 1A. The defense member 45 has a U-shape when viewed from the side, and the cutting stem S1 is scattered from the upper rotary blade 6 to the mobile body 2 in particular. Is preventing. The defense member 45 is configured by attaching a net member 45b to an upper part and a middle part of a pipe member frame 45a.
Next, stem cutting work by the stem cutting device 1A of the first embodiment will be described.

A stem cutting device 1A is arranged at an optimal height via a boom cylinder 30 with respect to the stem S1 of the root vegetable crop S vegetated on the straw in the field, and the upper and lower cutting mechanisms 5, 7 are moved by the prime mover 8 and the drive mechanism 9. The mobile body 2 is advanced while being driven.
The left and right upper rotary blades 6 positioned at the forefront of the traveling direction are positioned in front of the lower rotating blades 4 while the stem S1 tilted to the left in the traveling direction of the mobile body 2 is moved to the center by the divider 22. The upper part of the branched stem S1 is sequentially cut, and the cut stem S1 above the cut portion is discharged forward in the cutting direction of the left and right upper rotary blades 6 (right in the moving body traveling direction). The released cut stem S1 is collected in the intercostal groove.

The stem S1 of the crop S whose upper part has been cut then hits the lower rotary blade 4 of the lower cutting mechanism 5, and the lower part of the stem S1 branched by the lower rotary blade 4 is cut, and the cut portion The upper cutting stem S1 is discharged forward in the cutting direction of the lower rotary blade 4 (the same right direction as the upper rotary blade 6). The cut stem S1 is guided by the guide member 20 that covers the front side of the motor 8 in the moving body traveling direction, and the released cut stem S1 is collected in the intercostal groove.

The stem S1 between the upper and lower cut portions can be used as a seed stalk for transplantation, and the remaining crop S obtained by cutting the stem S1 to the lower portion is dug together with root vegetables by a digger as a post-treatment. This digger can also be connected and attached to the rear of the mobile machine body 2, and when the digger is attached to the mobile machine body 2, it is possible to work simultaneously from the cutting process of the stem S of the crop S to the digging of root vegetables.
In the second embodiment shown in FIGS. 10 and 11, the stem cutting device 1 </ b> B is a pair of left and right mower mechanisms that mow grass that grows on the left and right of the crop S below the bottom plate 3 a of the frame 3 and behind the lower cutting mechanism 5. 23 are arranged at a central interval.

An auxiliary case 47 is fixed to the left and right ends of the bottom plate 3 a of the frame 3, and a mower shaft 48 of the mower mechanism 23 is rotatably supported at the rear lower portion of the auxiliary case 47. Power is transmitted from the prime mover 8 by the auxiliary transmission means 24.
In the mower shaft 48, a cylindrical body 48B is fixed to an end shaft 48A supported by the auxiliary case 47, and a plurality of tines 48C are provided on the outer periphery of the cylindrical body 48B at intervals in the circumferential direction and the axial direction. .

In the drive mechanism 9 of the stem cutting device 1B, the gear case 35 on the bottom plate 3a is formed in a horizontally long shape, and power is transmitted from the prime mover 8 through the lower bevel transmission means 37 to a position away from the transmission shaft 15 in the left-right direction. An input shaft 35a is provided.
The gear case 35 includes a first horizontal shaft 49A extending from the transmission shaft 15 to one auxiliary case 47, a second horizontal shaft 49B extending from the transmission shaft 15 to the other auxiliary case 47, an input shaft 35a, and a first horizontal shaft 49A. And a forward / reverse switching transmission means 50 are provided.

  The forward / reverse switching transmission means 50 includes a bevel gear 50a provided on the input shaft 35a, and forward / reverse bevel gears 50b and 50c that are rotatably fitted to the first horizontal shaft 49A and simultaneously meshed with the bevel gear 50a. The forward / reverse bevel gears 50b and 50c have a shifter member 50d that selectively couples to the first horizontal shaft 49A, and a shift lever 50e that slides the shifter member 50d, and the power from the input shaft 35a is forwardly rotated. Alternatively, it can be reversed and transmitted to the left and right auxiliary transmission means 24.

One of the left and right auxiliary transmission means 24 is provided with a reverse gear 51 and is configured to rotate the left and right mower shafts 48 in the same direction.
A bevel pinion 52 is formed at opposite ends of the first and second horizontal shafts 49A and 49B. Both the bevel pinions 52 are simultaneously meshed with the bevel gear 36 provided on the transmission shaft 15, and the first horizontal shafts 49A and 49B are engaged with each other. The power of the shaft 49A is transmitted to the transmission shaft 15 and the second horizontal shaft 49B via the bevel gear 36.

  The power of the prime mover 8 is transmitted from the input shaft 35a to the first horizontal shaft 49A via the forward / reverse switching transmission means 50, and from the first horizontal shaft 49A to the same side mower shaft 48 via the left and right auxiliary transmission means 24. At the same time, it is transmitted to the second horizontal shaft 49B through the bevel gear 36, transmitted from the second horizontal shaft 49B to the mower shaft 48 on the same side through the left and right auxiliary transmission means 24, and left and right mower shaft 48. Rotate in the same direction and mow the grass with multiple left and right tines 48C.

Then, the transmission shaft 15 is driven by the rotation of the bevel gear 36, the lower rotation shaft 13 at the lower end of the transmission shaft 15 is driven, and the left and right upper rotation shaft 14 is driven from above the transmission shaft 15 via the upper transmission means 16. .
The stem cutting device 1B is capable of weeding the left and right sides of the crop S at the same time as cutting the top and bottom of the stem S1 of the crop S, and switching the discharge direction of the cut stem S1 to the left and right by the forward / reverse switching transmission means 50. it can.

The lower rotary blade 4 and the upper rotary blade 6 are formed with blade portions on the front and rear edges in the rotation direction and the inner and outer edges, and can be cut regardless of whether the cutting direction is forward or reverse.
In the third embodiment shown in FIGS. 12 to 14, the stem cutting device 1 </ b> C is configured by providing the lower rotary blade 4 on each of the pair of left and right lower rotary shafts 13 </ b> A and 13 </ b> B in which the lower cutting mechanism 5 rotates in the same direction. 8 is arranged behind the lower cutting mechanism 5 and includes a pair of left and right mower mechanisms 23 as in the second embodiment.

The upper cutting mechanism 7 has a pair of left and right upper rotary blades 6 as in the first embodiment, but the upper drive means 12 has a pair of left and right, and the left and right lower rotation shafts 13A, 13B to the upper rotation shaft 14A, The power is transmitted to 14B. The transmission case 40 can be formed separately, but has a common shape.
The motor 8 is mounted on the rear portion of the bottom plate 3a of the frame 3, and the gear case 35 of the drive mechanism 9 is supported on the front upper portion of the bottom plate 3a via the left and right brackets 55. 47 is connected.

The gear case 35 of the stem cutting device 1C connects a central gear case 35A and left and right gear cases 35B, 35C in the left-right direction. An input shaft 35a and a central horizontal shaft 56 are supported on the central gear case 35A, and the input shaft 35a A forward / reverse switching transmission means 50 similar to that of the second embodiment is provided between the central horizontal shaft 56 and the central horizontal shaft 56.
The left and right gear cases 35B and 35C have left and right lower rotary shafts 13A and 13B extending vertically, and the end portions of the central horizontal shaft 56 and the left and right outer ends are sandwiched between the rotary shafts 13A and 13B. The inner ends of first and second horizontal shafts 49A and 49B, which are input shafts of the left and right auxiliary transmission means 24, are arranged, and bevel gears 36A and 36B are provided on the rotary shafts 13A and 13B, respectively. The bevel gears 56a at both ends of the central horizontal shaft 56 and the bevel pinions 52 of the first and second horizontal shafts 49A and 49B are engaged with each other.

  The power of the prime mover 8 is transmitted from the input shaft 35a to the central horizontal shaft 56 via the forward / reverse switching transmission means 50, from the central horizontal shaft 56 to the first horizontal shaft 49A via the bevel gear 36A, and to the first horizontal shaft 49A. Is transmitted from the central horizontal shaft 56 to the second horizontal shaft 49B via the bevel gear 36B and is transmitted to the second horizontal shaft 49B through the reverse gear 51 and the auxiliary transmission means 24. The shaft 49B is transmitted to the same side (right side) mower shaft 48 via the left and right auxiliary transmission means 24, and the left and right mower shafts 48 are rotated in the same direction, and the grass is mowed by the multiple left and right tines 48C.

  The left and right lower rotary shafts 13A and 13B are driven in the same rotational direction (clockwise in the plan view of FIG. 13) by the rotation of the bevel gears 36A and 36B, and the cutting operation by the left and right lower rotary blades 4 is performed at the same time. The left and right transmission shafts 15A and 15B are driven in the same rotational direction, the left and right upper rotation shaft 14 is driven via the upper transmission means 16 from above the transmission shafts 15A and 15B, and precedes the left and right lower rotary blades 4 to advance left and right Cutting operation by the upper rotary blade 6 is performed.

The stem cutting device 1C can weed around the crop S at the same time as cutting the upper and lower two portions of the stem S1 of the crop S, and can switch the discharge direction of the cut stem S1 left and right by the forward / reverse switching transmission means 50. .
In the present invention, the shape of each member and the positional relationship of front / rear / left / right / up / down are best configured as shown in FIGS. However, it is not limited to each said embodiment, A member, a structure can be variously deformed, and a combination can also be changed.

For example, the lower cutting mechanism 5 has one lower rotating shaft 13 and the upper cutting mechanism 7 has one upper rotating shaft 14 and is arranged in the center of the left and right, or the upper cutting mechanism 7 is provided in a plurality of upper and lower stages. The upper stage may be gradually arranged forward from the lower stage, and the stem S1 may be cut at three or more locations.
Further, the drive mechanism 9 omits the transmission shaft 15 and can transmit power from the prime mover 8 or the lower belt transmission means 37 to the upper transmission means 16 or can switch between forward and reverse rotation instead of the lower belt transmission means 37. Gear transmission means may be provided.

DESCRIPTION OF SYMBOLS 1 Stem cutting device 2 Moving body 3 Frame 4 Lower rotary blade 5 Lower cutting mechanism 6 Upper rotary blade 7 Upper cutting mechanism 8 Motor 9 Drive mechanism 11 Lower drive means 12 Upper drive means 13 Lower rotary shaft 14 Upper rotary shaft 15 Power transmission shaft 16 Upper transmission means 20 Guide member 21 Support cylinder 22 Divider 23 Mower mechanism 24 Auxiliary transmission means S Root crop S1 Stem

Claims (9)

A lower cutting mechanism (5) for rotating the lower rotary blade (4) to cut the lower part of the stem (S1) of the root vegetable crop (S) on the frame (3) mounted on the mobile body (2), and the upper rotation An upper cutting mechanism (7) for rotating the blade (6) in the same direction as the lower rotating blade (4) to cut the upper part of the stem (S1), and a vertical cutting mechanism (5, 7) by power from the motor (8) And a drive mechanism (9) for driving
A stem characterized in that the upper rotary blade (6) of the upper cutting mechanism (7) is arranged in front of the lower rotary blade (4) of the lower cutting mechanism (5) in the traveling direction of the mobile body (2). Cutting device.   The drive mechanism (9) transmits power from the prime mover (8) to drive the lower cutting mechanism (5), and power from the lower drive means (11) to the upper cutting mechanism (7). The stalk cutting device according to claim 1, further comprising upper drive means (12) for transmitting the upper drive mechanism and driving the upper cutting mechanism (7).   The upper drive means (12) transmits power to the transmission shaft (15) extending upward from the lower drive means (11) and from the upper part of the transmission shaft (15) to the front upper rotary blade (6). The stalk cutting device according to claim 2, further comprising transmission means (16).   The upper cutting mechanism (7) is provided with an upper rotary blade (6) on each of a pair of left and right upper rotary shafts (14) rotating in the same direction in front of the lower rotary shaft (13) in plan view. The stalk cutting device according to any one of claims 1 to 3.   The stem cutting device according to any one of claims 1 to 4, wherein the lower cutting mechanism (5) is provided with a lower rotary blade (4) on one lower rotary shaft (13).   The prime mover (8) is arranged on the side of the lower rotary shaft (13) which is the front side in the cutting direction of the lower rotary blade (4), and covers the front side of the moving body in the traveling direction of the prime mover (8) and after cutting. The stem cutting device according to claim 5, wherein a guide member (20) for guiding the release of the stem (S1) is provided on the frame (3).   The lower cutting mechanism (5) is provided with a lower rotary blade (4) on each of a pair of left and right lower rotary shafts (13) rotating in the same direction. The stem cutting device as described.   It has a divider (22) that projects forward from the lower rotary blade (4) in the moving body traveling direction and guides the stem (S1) from the opposite side of the cutting direction of the lower rotary blade (4) to the lower rotary blade (4). The stalk cutting device according to any one of claims 1 to 7, wherein   Below the frame (3) and behind the lower cutting mechanism (5), a pair of left and right mower mechanisms (23) for cutting grass planted on the left and right sides of the root vegetable crop (S) are arranged with a central interval between them. The stem cutting according to any one of claims 1 to 8, wherein auxiliary transmission means (24) for transmitting power from the motor (8) is provided on the left and right outer sides of each mower mechanism (23). apparatus.

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