Crop harvester

Abstract

To provide a crop harvester capable of suppressing cutting errors of agricultural crops.SOLUTION: A crop harvester 1 cuts stalks of agricultural crops on a ridge top part with a reaping blade while traveling, with a front and a rear of a traveling body in contact with a ridge groove. The crop harvester 1 includes a first adjustment mechanism 50 for adjusting a height of the reaping blade 33 to a position of the ridge top part, when the rear 12 of the traveling body 10 is in contact with a headland and the front 14 is in contact with the ridge groove lower than the headland, and a second adjustment mechanism 60 for adjusting the height of the upwardly-displaced reaping blade 33 to a position substantially at the ridge top part by a single operation, when the rear 12 of the traveling body 10 passes through the headland and the front 14 and the rear 12 are in contact with the ridge groove.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a crop harvester. [Background technology]

[0002] Patent Document 1 discloses a Chinese cabbage harvester equipped with a rotating cutting blade on a running body that separates the root portion of the Chinese cabbage from the head portion, and a transport means that transports the head portion of the Chinese cabbage from which the root portion has been separated. Moreover, Patent Document 2 discloses a harvesting machine that moves along the bottom surface of a furrow and performs a predetermined operation on crops on the upper surface of the ridges.

[0003] In harvesters such as those described in Patent Documents 1 and 2, when starting work from the end of the ridge, the position of the rotating cutting blade fluctuates due to the inclination of the harvester as it moves from the flat headland into a ridge furrow that is lower than the headland, making it easy for cutting errors to occur in the crops. Conventionally, in order to avoid cutting errors, when the front wheels of the harvester move from the flat headland into a furrow that is lower than the headland and the harvester tilts forward, the position of the rotary cutting blade is adjusted to the position of the ridge top, and when both the front and rear wheels of the harvester are in the furrow and the harvester is level, the position of the rotary cutting blade is again adjusted. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 11-164609

[0005] [Patent Document 2] JP 2002-165512 A Summary of the Invention [Problem to be solved by the invention]

[0006] However, Patent Document 1 uses a hydraulic device to raise and lower the rotary cutting blade, but when readjusting the position of the rotary cutting blade, it is difficult to operate the hydraulic directional control valve, and Patent Document 2 uses a height adjustment handle to raise and lower the rotary cutting blade, but when readjusting the position, it is difficult to rotate the height adjustment handle. The object of the present invention is to provide a crop harvester that solves the above-mentioned conventional problems, allows the height position of the cutting blade to be easily adjusted when starting work from the edge of the furrow, and reduces the occurrence of mistakes in cutting the crops. [Means for solving the problem]

[0007] One aspect of the present invention is a crop harvester that cuts stalks of crops at the top of a ridge with a cutting blade while traveling with the front and rear of a running body grounded in a furrow, and is equipped with a first adjustment mechanism that adjusts the height of the cutting blade to a position approximately equal to the top of the ridge when the rear of the running body grounds on a pillow ground and the front of the running body grounds on a furrow that is lower than the pillow ground, and a second adjustment mechanism that adjusts the height of the cutting blade, which has been displaced upward, in a single operation to a position approximately equal to the top of the ridge when the rear of the running body passes through the pillow ground and the front and rear of the running body grounds on the furrow. Effect of the Invention

[0008] According to the present invention, the height position of the cutting blade can be easily adjusted when starting work from the edge of the furrow, thereby preventing mistakes in cutting crops. [Brief description of the drawings]

[0009] [Figure 1] FIG. 2 is a left side view of the takana harvester according to the first embodiment. [Diagram 2] Top view of the Takana harvester. [Diagram 3] FIG. [Figure 4] FIG. [Diagram 5](a) is a side view showing the Takana harvester when the front wheels 14 are grounded in the furrow R1 and the rear wheels are grounded on the pillow ground, (b) is a side view showing the Takana harvester when the front and rear wheels are grounded in the furrow, and (c) is a side view showing the Takana harvester after the height of the rotary cutting blade has been adjusted by the second adjustment mechanism. [Figure 6] FIG. 11 is a side view of a second adjustment mechanism according to the second embodiment. [Figure 7] FIG. 11 is a left side view of a takana harvester according to a third embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] (Embodiment 1) (composition) (Basic configuration) Fig. 1 is a left side view of a takana harvester 1 (crop harvester) according to the first embodiment. Fig. 2 is a plan view of the takana harvester 1. The takana harvester 1 is a device that harvests takana CM while traveling. The upper part of the takana CM is the leaf, and the lower part is the stem. Takana CM is mainly produced in the Kyushu region and is processed into various pickles. When harvesting Takana CM, it needs to be air-dried in the field, so the harvesting work involves cutting the stems of the Takana CM grown in ridges, turning them over, lining them up in the field, air-drying them, and collecting the Takana CM after half a day to a day of air-drying.

[0011] The Takana harvester 1 travels with the front wheels 14 and rear wheels 12 in contact with the furrows R1 between the ridges R formed in the field. The pair of left and right rear wheels 12 are positioned so as to straddle one ridge R from side to side. The Takana harvester 1 is a three-wheeled, rear-wheel drive walk-behind type agricultural harvester, and an operator holding a steering handle (not shown) steers the Takana harvester 1 from behind while walking on the furrow R1 where the left rear wheel 12 is located.

[0012] The takana harvester 1 has a running body 10. The running body 10 is equipped with a base 31, a rotary cutting blade 33, a conveyor belt 35, a loading plate 37, a resistance roller 37b, a raking blade 39, a first chute 38, and a second chute 40, and further, although not shown, a pair of left and right rear wheels 12 and an internal combustion engine that drives the conveyor belt 35 are mounted. The conveyor belt 35 is wound around a pulley (for driving, for floating, for tension) with a V groove provided by the belt driving unit 36, and is driven in a circular manner by the driving force of the internal combustion engine being transmitted to the belt driving unit 36, and conveys the takana CM on the loading plate 37 backward. The takana CM conveyed backward on the loading plate 37 is arranged in the furrow in an upside-down state by the cooperation of the resistance roller 37b located at the rear end 37a of the loading plate 37 and the raking blade 39 having a plurality of blades 39a.

[0013] The running body 10 has a machine frame 11 extending in the front-rear direction. The machine frame 11 is located on the left side of the takana harvester 1. The running body 10 has a first support member 13 and a second support member 15 extending to the left and right, respectively. The first support member 13 is fixed to the rear end of the machine frame 11 and extends to the right from the machine frame 11. The second support member 15 is fixed to a midpoint of the machine frame 11 in the front-rear direction and extends to the right from the machine frame 11.

[0014] A pair of left and right rear wheels 12 (rear parts of the running body 10) are fixed to an axle 12a that passes through the machine frame 11 and the first support member 13 from left to right. The running body 10 has one front wheel 14 (front part of the running body 10). The front wheel 14 is located on the left side of the takana harvester 1.

[0015] The Takana harvester 1 has a base 31 fixed to the traveling body 10. The base 31 is fixed to the second support member 15 and extends upward toward the front from the second support member 15. A rotary cutting blade (cutting blade) 33 is attached to the base 31.

[0016] The rotary cutting blade 33 is a disc-shaped blade that rotates when the driving force of the internal combustion engine is transmitted to it and cuts the stems of the Takana CM. The rotary cutting blade 33 is held in a downward-facing position at the front end of a cutting blade holding member 34 that extends forward from the base 31. The rotary cutting blade 33 is located near the center of the pair of rear wheels 12 in the left-right direction, and is therefore in a position that overlaps with the ridge top portion R2, which is the uppermost portion of the ridge R in a plan view, when the front wheels 14 and the rear wheels 12 are positioned in the ridge furrow.

[0017] (Mechanism for adjusting the height of the rotary blade) It is desirable that the rotary cutting blade 33 cuts the takana CM at a position approximately 2 to 4 cm above the ridge top R2 (approximately at the position of the ridge top R2). In order to adjust the height of the rotary cutting blade 33 to the position of approximately the ridge top R2, the takana harvester 1 is provided with a first adjustment mechanism 50 and a second adjustment mechanism 60 for adjusting the height of the rotary cutting blade 33. By appropriately adjusting the height position of the rotary cutting blade 33, it is possible to prevent the leaves from scattering when the takana CM is cut above the stem, and to prevent the rotary cutting blade 33 from coming into contact with the ridge R.

[0018] (1st adjustment mechanism 50) The front wheel 14 is attached to one end of a front wheel rotating arm 17 via a shaft 14a, and the other end of the front wheel rotating arm 17 is connected to a front wheel support shaft 17a. The front wheel support shaft 17a passes through the vehicle frame 11 and is connected to one end of a connecting link member 51 inside the vehicle frame 11. One end of a hollow connecting arm 53 is connected to the other end of the connecting link member 51 via a connecting shaft 52. A female thread (not shown) is formed on the inner periphery of the other end of the connecting arm 53, and a male thread 55a on the rod 55 side is screwed into the female thread. The rod 55 has a straight portion 55b and a handle portion 55c (first operating portion).

[0019] When the operator turns handle portion 55c, the amount of tightening of male thread 55a relative to the female thread of connecting arm 53 changes, and connecting arm 53 moves forward and backward. When connecting arm 53 moves forward and backward, connecting link member 51 and front wheel rotating arm 17 rotate about front wheel support shaft 17a, the front end of machine body frame 11 moves up and down, and second support member 15, base portion 31, blade holding member 34, and rotary cutting blade 33 move up and down together with machine body frame 11, and the height of rotary cutting blade 33 is adjusted. Hereinafter, the connecting arm 53, the straight portion 55b, the connecting link member 51, and the front wheel rotating arm 17 are collectively referred to as the first connecting mechanism 50a. The first connecting mechanism 50a connects the handle portion 55c and the front wheel 14, and is displaced by operating the handle portion 55c to adjust the height of the rotary cutting blade 33 to the position of approximately the ridge top R2.

[0020] (Second adjustment mechanism 60) FIG. 3 is a left side view of the second adjustment mechanism 60. FIG. The second adjustment mechanism 60 has a rod holding part 62, and the rod holding part 62 holds the straight part 55b of the rod 55 of the first adjustment mechanism 50. The front body S1 and the rear body S2, which extend radially outward from the straight part 55b, are fixed to the straight part 55b, and the straight part 55b between the front body S1 and the rear body S2 is inserted into the rod holding part 62. The rod 55 is rotatable inside the rod holding part 62. The front body S1 and the rear body S2 contact the rod holding part 62 to restrict the relative movement between the rod 55 and the rod holding part 62 in the front-rear direction, and move the rod 55 and the rod holding part 62 together in the front-rear direction. The second adjustment mechanism 60 has a base part 61 mounted on the traveling body 10, a rod holding part 62, a parallel link mechanism 63, and a lever stopper 65.

[0021] The parallel link mechanism 63 is a closed-loop four-bar link mechanism in which a pair of opposing links 63a, 63c and another pair of opposing links 63b, 63d have the same length. The link 63c is fixed to the base 61, and the links 63a to 63d are connected by the joints 63e to 63h. The above-mentioned rod holding part 62 is attached to the upper surface of the link 63a. The link 63d is provided with an operating lever (second operating part) 64 that extends rearward from the joint part with the link 63c. The operating lever 64 is a rod-shaped member that extends rearward. The operating lever 64 rotates integrally with the link 63d around the joint 63g. The operating lever 64 is sufficiently longer than the link 63d, and can easily displace the parallel link mechanism 63. A joint part 64a is provided in the middle of the operating lever 64, and a part rearward of the joint part 64a is formed so as to be swingable left and right around the joint part 64a.

[0022] FIG. 4 is a rear view of the lever stopper 65. FIG. The lever stopper 65 is a plate-shaped member fixed to the base portion 61. A lever movement hole 65a through which the operating lever 64 is inserted is formed in the lever stopper 65. The lever movement hole 65a is a hole that extends vertically. Furthermore, the lever stopper 65 is provided with four notches 65b spaced apart vertically, and each of the notches 65b is connected to a lever movement hole 65a. The operating lever 64 can be inserted into each of the notches 65b, and the notches 65b restrict the rotation of the operating lever 64. In other words, the lever stopper 65 positions the operating lever 64 and the parallel link mechanism 63 at stages according to the number of the formed notches 65b.

[0023] When an operator swings the operation lever 64 up and down, the parallel link mechanism 63 is displaced, and the rod holding part 62 connected to the link 63a moves back and forth. As a result, the rod 55 and the connecting arm 53 move back and forth together with the rod holding part 62, and the rotary cutting blade 33 moves up and down as in the case of the first adjustment mechanism 50. Hereinafter, the parallel link mechanism 63 and the rod holding part 62 are collectively referred to as the second connecting mechanism 60a. The second connecting mechanism 60a connects the operation lever 64 and the first connecting mechanism 50a. In addition, the second connecting mechanism 60a is displaced by operating the operation lever 64, thereby displacing the first connecting mechanism 50a and adjusting the height of the rotary cutting blade 33.

[0024] (The Takana harvester moves from the headland into the furrow) FIG. 5(a) is a side view showing the takana harvester 1 when the front wheels 14 are in contact with the furrow R1 and the rear wheels 12 are in contact with the headland HL. When the Takana harvester 1 first starts traveling along the ridge R in a farm field, the operator temporarily stops the Takana harvester 1 from traveling after the front wheels 14 touch the furrow R1 and before the rotary cutting blade 33 reaches the Takana CM. When the Takana harvester 1 is temporarily stopped, the front wheels 14 are in contact with the furrow R1 and the rear wheels 12 are in contact with the headland HL. Since the headland HL is higher than the furrow R1, the Takana harvester 1 in this state is tilted forward.

[0025] In this state, the operator adjusts the height of the rotary cutting blade 33 using the first adjustment mechanism 50. When the handle portion 55c is rotated to the right, the degree of engagement between the female thread of the connecting arm 53 and the male thread of the rod 55 increases, and the connecting arm 53 is pulled backward. As a result, the front wheel 14 moves leftward, the front end of the machine frame 11 descends, and the height of the rotary cutting blade 33 is adjusted in a lowering direction. When the handle portion 55c is rotated to the left, the degree of engagement between the female thread of the connecting arm 53 and the male thread of the rod 55 decreases, and the connecting arm 53 is pushed forward. As a result, the front wheel 14 moves backward, the front end of the machine frame 11 rises, and the height of the rotary cutting blade 33 is adjusted in a higher direction. The operator rotates the handle portion 55c to set the vertical distance G1 between the ridge top R2 and the rotary cutting blade 33. The distance G1 is approximately 2 cm to 4 cm, and the rotary cutting blade 33 moves to approximately the position of the ridge top R2.

[0026] After adjusting the height of the rotary cutting blade 33, the operator resumes traveling of the takana harvester 1. When traveling is resumed, the rotary cutting blade 33 is approximately at the position of the ridge top R2 when the rear wheels 12 are in contact with the headland HL. Therefore, even if the takana CM is harvested with the rear wheels 12 in contact with the headland HL, cutting errors of the takana CM are unlikely to occur.

[0027] Fig. 5(b) is a side view showing the takana harvester 1 when the front wheels 14 and the rear wheels 12 touch the furrow R1. When the takana harvester 1 continues to travel and the rear wheels 12 touch the furrow R1, it reaches the state shown in Fig. 5(b), and the posture of the takana harvester 1 becomes approximately horizontal. In this state, the machine body frame 11 is rotated rearward and downward from the state in Fig. 5(a), so that the rotary cutting blade 33, which rotates integrally with the machine body frame 11, is displaced upward. Therefore, the distance G2 between the rotary cutting blade 33 and the ridge top R2 becomes larger than the distance G1. The distance G2 is, for example, larger than the preferable dimension of 2 cm to 4 cm.

[0028] If the takana CM is cut in the state shown in Fig. 5(b), there is a risk that the leaves of the takana CM may be cut. Therefore, when the state shown in Fig. 5(b) is reached, the operator adjusts the height of the rotary cutting blade 33 again using the second adjustment mechanism 60. The operator rotates the operating lever 64 of the second adjustment mechanism 60 in the direction shown by the arrow in Fig. 5(b) and Fig. 5(c). At this time, the operating lever 64 is engaged with a predetermined one of the four notches 65b of the lever stopper 65 shown in Fig. 4, and the rotation operation is completed. Which notch 65b is engaged with is determined in advance depending on the height from the furrow R1 to the ridge crest R2.

[0029] As a result of the height adjustment by the second adjustment mechanism 60, as shown in FIG. 5(c), the interval G3 between the rotary cutting blade 33 and the ridge top R2 is approximately the same as the interval G1, and the rotary cutting blade 33 is adjusted to the position of approximately the ridge top R2. Compared to the first adjustment mechanism 50, the height adjustment by the second adjustment mechanism 60 can be easily adjusted from the interval G2 to the interval G3 in one go by operating the operation lever 64 once. Therefore, in the process in which the takana harvester 1 progresses from the state of FIG. 5(b) to the state of FIG. 5(c), the height of the rotary cutting blade 33 can be easily adjusted by simply operating the operation lever 64 once, and the operator can harvest the takana CM without cutting errors by simply running the takana harvester 1 along the ridge R.

[0030] In this embodiment, after harvesting the ridge CM of one row approximately at the ridge top R2, the procedure of Fig. 5(a) to Fig. 5(c) is repeated when harvesting the ridge CM of the second row approximately at the ridge top R2, but since the depth of the ridge furrow R1 and the height of the ridge top R2 are expected to be approximately uniform in the same field, in harvesting the second row, the operating lever 64 may be rotated in the direction opposite to the arrow in the state of Fig. 5(a). This prevents the rotary cutting blade 33 from interfering with the ridge top R2 when the front wheel 14 touches the ridge furrow R1 and the rear wheel 12 touches the pillow land HL, and the ridge CM can be harvested without cutting errors.

[0031] As described above, in the first adjustment mechanism 50, the amount of movement of the connecting arm 53 when the handle portion 55c rotates once is equivalent to the pitch of the male thread and the female thread of the connecting arm 53, and the amount of vertical movement of the front end of the body frame 11 is kept quite small compared to the number of times the handle portion 55c is rotated. In contrast, in the second adjustment mechanism 60, the amount of movement of the connecting arm 53 when the operating lever 64 is swung up and down is a distance significantly greater than the pitch of the male thread and the female thread of the connecting arm 53. Therefore, when changing the height of the rotary cutting blade 33 with the second adjustment mechanism 60, the operator only needs to operate the operating lever 64 once, and the height of the rotary cutting blade 33 can be easily adjusted.

[0032] (Effects, etc.) As described above, the Takana harvester 1 of this embodiment is equipped with a first adjustment mechanism 50 that adjusts the height of the rotary cutting blade 33 to a position approximately equal to the ridge top R2 when the rear wheels 12 of the running body 10 touch the pillow ground HL and the front wheels 14 touch the furrow R1 which is lower than the pillow ground HL, and a second adjustment mechanism 60 that adjusts the height of the rotary cutting blade 33 displaced upward in a single operation to a position approximately equal to the ridge top R2 when the rear wheels 12 of the running body 10 pass through the pillow ground and the front wheels 14 and rear wheels 12 touch the furrow R1. As a result, even if the rotary cutting blade 33 is displaced upward due to the difference in height between the ridge furrow R1 and the pillow land HL, the height of the rotary cutting blade 33 can be adjusted to approximately the position of the ridge top R2 in one operation by using the second adjustment mechanism 60. This makes it possible to prevent cutting errors in the ridge CM.

[0033] Also, as in this embodiment, the second adjustment mechanism 60 may be configured to be capable of adjusting the amount by which the rotary cutting blade 33 is displaced in one operation in accordance with the height of the ridge crest R2. As a result, in fields where the height of the ridge top R2 varies, the height of the rotary cutting blade 33 can be adjusted to approximately the position of the ridge top R2 in a single operation using the second adjustment mechanism 60. This makes it possible to prevent cutting errors of the cutting blade CM from occurring in various fields. In particular, in this embodiment, a plate-shaped lever stopper 65 having a lever movement hole 65a and a notch 65b formed therein is used to adjust the amount by which the rotary cutting blade 33 is displaced in one operation. Therefore, with a simple configuration, it is possible to adjust the amount by which the rotary cutting blade 33 is displaced in one operation.

[0034] Furthermore, as in this embodiment, in the Takana harvester 1, the first adjustment mechanism 50 has a handle portion 55c, and by operating the handle portion 55c, the first connecting mechanism 50a connecting the handle portion 55c and the front wheel 14 is displaced to adjust the height of the rotary cutting blade 33 to a position approximately at the top of the ridge R2, and the second adjustment mechanism 60 has an operating lever 64, and by operating the operating lever 64, the second connecting mechanism 60a is operated to displace the first connecting mechanism 50a, thereby adjusting the height of the rotary cutting blade 33 displaced upward to a position approximately at the top of the ridge R2 in a single operation. Therefore, the adjustments by the first adjustment mechanism 50 and the second adjustment mechanism 60 can be selectively performed by operating different operating parts, namely the rod 55 and the operating lever 64. Moreover, both the first adjustment mechanism 50 and the second adjustment mechanism 60 can displace the first connecting mechanism 50a to adjust the height of the rotary cutting blade 33. Therefore, with a simple configuration, it is possible to prevent cutting errors of the trimmer CM from occurring.

[0035] Furthermore, as in this embodiment, the second connecting mechanism 60a may be configured to include the parallel link mechanism 63. This allows the second connecting mechanism 60a to be configured with a simple structure.

[0036] (Embodiment 2) FIG. 6 is a side view of the second adjustment mechanism 160 according to the second embodiment. The second adjustment mechanism 160 according to the second embodiment has a toggle joint type slider mechanism 163 instead of the parallel link mechanism 63. The slider mechanism 163 has a rail 163a fixed to the upper surface of the base 61, a rod holding part 162 attached to the rail 163a, and a link 163b connecting the rod holding part 162 and an operation lever (second operation part) 164. The rod holding part 162 holds the rod 55 in the same manner as the rod holding part 62 of the first embodiment. The rail 163a is provided along the front-rear direction. The rod holding part 162 is attached to the rail 163a so as to be slidable back and forth. The operation lever 164 is rotatable about an axis in the left-right direction with respect to the upper end of the base 61.

[0037] In the second adjustment mechanism 160, when the operating lever 164 is lowered by the operator, the rod 55 is pulled rearward via the link 163b. As a result, the front end of the body frame 11 is displaced downward, and the height of the rotary cutting blade 33 is lowered. Conversely, in the second adjustment mechanism 160, when the operating lever 164 is raised by the operator, the rod 55 is pushed forward via the link 163b. As a result, the front end of the machine body frame 11 is displaced upward, and the height of the rotary cutting blade 33 increases. That is, the second connecting mechanism 160a may be configured to include the slider mechanism 163. This allows the second connecting mechanism 160a to be configured simply.

[0038] (Embodiment 3) 7 is a left side view of the takana harvester 201 according to the embodiment 3. In the first adjustment mechanism 250 of the embodiment 3, the rod 255 and the connecting arm 253 are connected via a turnbuckle 257 (first operating part). The turnbuckle 257 is configured to be able to adjust the distance between the connecting arm 253 and the rod 255, and by operating the turnbuckle 257, the connecting arm 253 moves back and forth relative to the rod 255. The first connecting mechanism 250a includes the connecting arm 253, a connecting link member 51, and the front wheel rotating arm 17.

[0039] In the third embodiment, the second connecting mechanism 260a that connects the operating lever 264 and the first connecting mechanism 250a has a Scott-Russell approximation parallel motion type slider mechanism 263. The slider mechanism 263 has the above-mentioned rail 163a, a slider 262 slidably attached to the rail 163a, and a link 263b that connects the upper end of the base portion 61 and the operating lever 264. The rear end of the rod 255 and the front end of the operating lever 264 are each connected to the slider 262 via a hinge so as to be rotatable about an axis in the left-right direction.

[0040] In the second adjustment mechanism 260, when the operating lever 264 is lowered by the operator, the link 263b falls forward and the slider 262 slides forward. This increases the height of the rotary cutting blade 33. Conversely, when the operating lever 264 is raised upward by the operator, the link 263b stands up and the slider 262 slides backward. This decreases the height of the rotary cutting blade 33.

[0041] (Other embodiments)

[0042] In the above embodiment, an example in which the crop harvester of the present invention is applied to the takana harvester 1 has been described, but this is merely one example. For example, the crop harvester of the present invention may be applied to a device for harvesting any leafy vegetable other than takana.

[0043] In the above embodiment, the takana harvester 1 is described as being driven by the driving force of the internal combustion engine, but this is just one example. For example, the takana harvester 1 may be driven by power output from a battery or a generator.

[0044] In the above embodiment, the takana harvester 1 has been described as harvesting the takana CM with the rotary cutting blade 33, but this is just one example. The cutting blade used by the takana harvester 1 to harvest the takana CM is not limited to a rotary type.

[0045] In the above embodiment, the lever stopper 65 is described as having four notches 65b formed to the left of the lever movement hole 65a, but this is just one example. Any number of notches 65b may be provided, and they may be provided on either the left or right side or both sides of the lever movement hole 65a.

[0046] In the above embodiment, the front wheels 14 are described as being provided on the left side of the takana harvester 1, but the front wheels 14 may also be provided on the right side of the takana harvester 1, or on both the left and right sides.

[0047] New embodiments can be formed by combining the elements of the above-described embodiments. For example, the first adjustment mechanism 50 of the first embodiment and the second adjustment mechanism 260 of the third embodiment can be combined to form a new embodiment. [Explanation of symbols]

[0048] 1. Takana Harvester (Crop Harvester) 10 Running body 12 Rear wheels (rear of the running body) 14 Front wheel (front of running body) 33 Rotary blade (blade) 50 1st adjustment mechanism 50a 1st connection mechanism 55c Handle section (first operating section) 60 Second adjustment mechanism 60a Second connecting mechanism 63 Parallel link mechanism 64 Operating lever (second operating part) 160 Second adjustment mechanism 160a 2nd connection mechanism 163 Slider Mechanism 164 Operating lever (second operating part) 250 1st adjustment mechanism 250a 1st connection mechanism 257 Turnbuckle (first operating part) 260 Second adjustment mechanism 260a 2nd connection mechanism 263 Slider Mechanism 264 Operating lever (second operating part) CM Takana HL headland R ridge R1 furrow R2 ridge top

Claims

1. A crop harvester that cuts stalks of crops at the tops of ridges with a cutting blade while traveling with the front and rear of a traveling body in contact with the ridges, a first adjustment mechanism that adjusts the height of the cutting blade to a position approximately equal to the ridge top when the rear part of the traveling body touches the pillow ground and the front part touches a furrow that is lower than the pillow ground, and a second adjustment mechanism that adjusts the height of the cutting blade, which has been displaced upward, to a position approximately equal to the ridge top in a single operation when the rear part of the traveling body passes through the pillow ground and the front and rear parts touch the furrow. Crop harvesting machine.

2. The second adjustment mechanism includes: The amount by which the cutting blade is displaced in one operation can be adjusted according to the height of the ridge top.

2. A crop harvester according to claim 1.

3. The first adjustment mechanism includes: A first operation unit is provided, By operating the first operating part, a first connecting mechanism that connects the first operating part and the front part of the traveling body is displaced to adjust the height of the cutting blade to a position approximately at the ridge top, The second adjustment mechanism includes: A second operation unit is provided, By operating the second operating part, a second connecting mechanism that displaces the first connecting mechanism is operated, and the height of the cutting blade displaced upward is adjusted to a position approximately at the ridge top in a single operation.

3. A crop harvester according to claim 1 or 2.

4. The second connecting mechanism includes a parallel link mechanism.

4. A crop harvester according to claim 3.

5. the second connecting mechanism includes a slider mechanism; 4. A crop harvester according to claim 3.

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