JPH0515222A - Lifting structure of reaping part of combine - Google Patents

Abstract

PURPOSE:To avoid the problem of the lowering of accuracy of lifting motion of a reaping part caused by the presence of waste straw remaining between a ground sensor and the ground even by using a ground sensor having large width. CONSTITUTION:A plurality of vertically movable ground sensors 9 are placed below a reaping part 1. The plural ground sensors 9 are alternately lifted from the ground G at regular intervals and kept to the lifted state by a posture- changing means 17. The reaping part 1 is automatically lifted by an automatic lifting means to keep the reaping part 1 at a prescribed height from the ground- contacting part of the grounded sensor 9 among the plural sensors 9 to a prescribed height.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevating structure for a mowing section provided at a front part of a combine body.

[0002]

2. Description of the Related Art In a conventional combine harvester, a sled-like grounding sensor is attached to the lower part of the mowing part to follow the grounding on the ground and can move up and down. There is one that has an elevating structure that automatically elevates and lowers the reaper so as to maintain the set height.
The reason for providing such an elevating structure is to prevent the cutting blades and the like of the mowing device from being damaged due to the collision of the clipper type mowing device attached to the lowermost part of the mowing part with the ground or the like. is there.

[0003]

In the elevating structure, since the raising and lowering drive of the reaper is performed only with reference to the ground on which the ground sensor is grounded, the ground other than the portion where the ground sensor is grounded is used. If there is a convex portion on the ridge, the reaper will collide with the convex portion. Therefore,
It has been proposed to form the ground sensor in a wide width so that the ground sensor is grounded over a wide range as much as possible. However, if the ground sensor is made wide,
As the aircraft progresses, it becomes easier for straw dust to accumulate between the ground sensor and the ground, and if this occurs, it will be difficult for the ground sensor to accurately follow the ground and the ground sensor will float from the ground. Become. When this happens,
There is a problem that the position of the reaper is too high and the accuracy of the lifting drive is reduced. The present invention has been made by paying attention to such an actual situation, and solves the problem that the accuracy of the ascending / descending drive is deteriorated due to the accumulation of the straw scraps even if a wide sensor is used as the grounding sensor. The purpose is to provide a means of obtaining.

[0004]

According to an embodiment of the present invention, there is provided a combine harvester lifting / lowering structure in which a plurality of vertically movable ground sensors are provided at a lower portion of the harvester, and the ground sensors are replaced at every set time. The posture switching means for further lifting and holding, and the mowing section are automatically moved up and down so that the height from the grounding section to the mowing section of the grounding sensor among the plurality of grounding sensors is maintained at the set height. The first characteristic configuration is that the automatic elevating means for driving is provided.

Further, the second characteristic constitution is that the operation of the posture switching means is stopped so that the plurality of ground sensors can be constantly switched to the grounded state.

Further, a third characteristic configuration is that a space is formed between the adjacent ground sensors.

[0007]

According to the first characteristic configuration, the grounding sensor (hereinafter referred to as a grounding sensor) grounded on the ground follows the ground, and the height from the grounding part to the mowing part of the grounding sensor is increased. The raising / lowering drive of the reaper is performed by the automatic raising / lowering means so that the height is maintained at the set height. And
When the set time elapses, straw debris will accumulate between the grounded sensor and the ground. In that state, the grounding sensor is alternately lifted by the posture switching means, so the grounding sensor The straw between the ground and the ground will escape to the rear. Furthermore, when the grounding sensor is lifted, another grounding sensor will come into contact with the ground, and from this point until the set time elapses, the mowing unit of the cutting unit will be based on the newly grounded sensor. Lifting and lowering drive is performed. After that, these operations are repeated.

According to the second characteristic configuration, the posture switching means is stopped when there is no fear that straw dust will stay between the grounding sensor and the ground. And by stopping it, multiple ground sensors can be grounded to the ground at the same time, so the grounding range becomes wider than when only some of the ground sensors are grounded, and the reaper may collide with the ground. The situation can be more surely avoided.

According to the third characteristic configuration, the stray straw debris can escape rearward from the space formed between the adjacent ground sensors.

[0010]

According to the present invention, even if a wide grounding sensor is used, the plurality of grounding sensors can be used alternately to allow the straw dust to escape at a proper time, and the space portion is formed. If so, the straw waste can be released from there at any time. Therefore, even if the wide ground sensor is used, it is possible to prevent the accuracy of the up-and-down drive of the cutting unit due to the accumulation of straw scraps. As a result, it is possible to efficiently mow the crop while preventing the mowing unit from colliding with the ground as much as possible. In addition, when there is no risk of the accumulation of straw debris, multiple ground sensors are grounded to the ground to further prevent the mowing unit from colliding with the ground and improve the durability of the mowing unit. You will be able to plan.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 shows an embodiment of a combine to which the reaper section lifting structure of the present invention is applied, that is, a combine for soybeans and buckwheat, and a rotary scraping reel is provided at the front part of the combine. 2, a clipper-type mowing device 3, an auger 4 for bringing the cut grain culms, a feed conveyor 5 for feeding the grain stalks upward, and the like, and a slaughtered grain culm is fed to the feed conveyor 5 From the grain culm discharge port 11 through the lower side of the rotary drive type beater 12,
It is discharged onto the belt type supply conveyor 13.

The harvesting section 1 is swingably supported around the horizontal axis P _{1 on} a machine body frame 6 of the combine (more specifically, the front frame 7 thereof), and the harvesting section 1 is driven. A hydraulic cylinder 8 for
The reaper 1 is vertically driven. As shown in FIGS. 1 to 3, a pair of left and right ground sensors 9 formed by bending a wide flat plate into a warp are provided so as to be vertically swingable around a horizontal axis P _{4 on} the lower surface of the cutting unit 1. When the pair of ground sensors 9 are distinguished from each other, the left ground sensor is 9L and the right ground sensor is 9R. Further, potentiometers 10L and 10R for detecting the vertical angles of the pair of left and right ground sensors 9L and 9R with respect to the mowing unit 1 are provided, respectively. A space K is formed between the pair of left and right ground sensors 9L and 9R, as shown in FIG.

Double-acting hydraulic cylinders 17R and 17L are provided on the rear surface of the reaping section 1 as posture switching means 17 for alternately changing the ground sensors 9L and 9R every set time and lifting and holding them from the ground G. A left and right pair are provided. A linking rod 18 is attached to a piston rod 17a of each of the hydraulic cylinders 17R and 17L so as to freely expand and contract within a set range. A spring 19 is attached to the piston rod 17a to urge the linking rod 18 downward.

In FIG. 1, the left hydraulic cylinder 17L is extended to ground the left ground sensor 9L to the ground G, and the right hydraulic cylinder 17R is contracted to lift the right ground sensor 9R from the ground G. The state is shown. In this state, the vertical angle of the left ground sensor 9L becomes the set value based on the signal from the left potentiometer 10L (that is, the height from the left ground sensor 9L to the mowing unit 1 becomes the set value). As described above, the control device 20 causes the hydraulic cylinder 8 to expand and contract to drive the mowing unit 1 up and down.

When a timer (not shown) built in the control unit 20 counts the set time,
The left hydraulic cylinder 17L lifts the left ground contact sensor 9L from the ground G, and the right hydraulic cylinder 1L
The right ground sensor 9R is moved down by 7R to contact the ground G. As a result, the straw debris accumulated between the ground contact sensor 9L on the left and the ground G can escape backward. In addition, straw chips also escape backward from the space K between the pair of left and right ground sensors 9L and 9R. Then, based on the signal from the right potentiometer 10R, the vertical angle of the right ground sensor 9R becomes a set value (that is, the height from the right ground sensor 9R to the cutting unit 1 becomes the set value. ), The hydraulic cylinder 8 is expanded / contracted by the control device 20 to drive the cutting unit 1 up and down.

When the set time has elapsed, the left ground contact sensor 9L is again lowered to contact the ground G and the right ground contact sensor 9R is lifted from the ground G. As described above, the left and right ground sensors 9R and 9L are alternately grounded every set time.

When the changeover switch 21 is operated, the left and right hydraulic cylinders 17R and 17L can be extended so that the left and right ground sensors 9R and 9L are always grounded to the ground G. ing. In this case, of the left and right ground sensors 9R and 9L, the ground sensor 9 on the high position side is based on the signal from the high position side.
The cutting unit 1 is driven up and down so as to maintain the set height from R and 9L.

Next, the processing of the cut grain culm will be described. As shown in FIG. 2, the supply conveyor 13 that receives the grain culm from the grain culm discharge port 11 has a pair of rollers 13a,
A rubber belt 13c is wound around 13b, and the entire supply conveyor 13 is supported so as to swing up and down around the fulcrum P ₂ of the roller 13a on the grain culm discharge port 11 side, and is biased upward. .

Above the roller 13b on the side of the handling chamber 14,
As shown in FIG. 2, the pressure roller 15 is arranged. The pressure roller 15 is made by sticking rubber to a metal cylinder, and is driven to rotate counterclockwise in the drawing at a speed lower than the feeding speed of the supply conveyor 13.

In the handling chamber 14, the handling cylinder 16 is driven to rotate clockwise about the horizontal axis P ₃ in the drawing. Rasp teeth 16a that are inclined with respect to the rotation direction are attached to the handling cylinder 16 while alternately changing the inclination direction.

The cut grain culms are sent by the supply conveyor 13 in a posture in which the tips are directed to the right side of the paper surface of FIG. 2, and are crushed between the roller 13b and the pressure roller 15 while It is sent into the handling chamber 14 while being rubbed by the speed difference between 13b and the pressure roller 15.
Then, due to the hitting action from the bottom to the top due to the rotation of the handling cylinder 16 and the squeeze / rubbing action due to the rasp teeth 16a, most of the grains become single grains and fall downward from the end of the supply conveyor 13. Further, the grains with branches which have not been sufficiently made into single grains are sent upward so as to be entangled with the handling cylinder 16, and are kneaded to be made into single grains, and from inside the handling barrel 16 or the supply conveyor. It falls from the side opposite to the end of 13.

Below the handling chamber 14, there is provided a sorting section for sorting the processing objects that fall as described above. As shown in FIG. 2, the sorting part has a cage-like sorting plate 2
3 and the guide plate 24, the Karako 27, the wind direction plate 28 for adjusting the wind direction, etc. are provided, and the No. 1 screw is the No. 1 screw 29.
Will be collected. And the second one is the second one processing rotor 3
The grains and the like, which have been collected in No. 1 and have been made into single grains, have leaked from the No. 2 treating rotor 31 are collected as No. 2 by the No. 2 screw 33.

Next, another embodiment will be described. In the above-described embodiment, the plurality of ground sensors 9 are composed of a pair of simple flat plate left and right ground sensors 9R and 9L, but a plurality of narrow strips are arranged side by side. Alternatively, one ground sensor may be configured, and a pair of the ground sensors may be provided on the left and right sides.

Further, as shown in FIG. 4, the plurality of ground sensors 9 are composed of three ground sensors 9L, 9M, 9R arranged side by side in the left-right direction. The space K is provided between the adjacent portions of 9M and 9R.
An example in which each is formed is also conceivable. In addition, the 3
The individual ground sensors 9L, 9M, 9R are the posture switching means 1
By means of 7, it is alternately lifted and held above the ground G every set time.

Further, as shown in FIG. 5, the plurality of ground sensors 9 are arranged side by side in the left-right direction, and front ground sensors 9LF and 9RF are arranged side by side so that they do not overlap in the front-rear direction. A total of four ground sensors 9LF, 9RF, 9LB, which are configured by combining two ground sensors 9LB, 9RB on the rear side, which are arranged side by side.
An embodiment composed of 9 RBs is also conceivable. The space K is formed between the four ground sensors 9LF, 9RF, 9LB, and 9RB that are adjacent to each other in the left-right direction. Incidentally, the ground sensor 9 on the front side
The attitude switching means 17 alternately lifts and holds the LF and 9RF from the ground G at every set time, and the rear ground sensors 9LB and 9RB also change their attitudes.
Thus, it is alternately lifted and held above the ground G every set time.

It is also possible to consider an embodiment in which the plurality of ground sensors 9 are arranged side by side only in the front-back direction.

It should be noted that reference numerals are added to the claims for convenience of comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is a side view showing an operating state of a plurality of ground sensors.

[Fig. 2] Overall side view of the combine

FIG. 3 is a plan view of a plurality of ground sensors

FIG. 4 is a plan view of a plurality of ground sensors according to another embodiment.

FIG. 5 is a plan view of a plurality of ground sensors according to another embodiment.

[Explanation of symbols]

1 reaper 9 ground sensor 17 Posture switching means G ground K space department

Claims (3)

[Claims] 1. A plurality of ground sensors (9) which can be moved up and down are provided at the bottom of the reaper (1), and the plurality of ground sensors (9) are alternated every set time and lifted and held from the ground (G). The posture switching means (17) and the height of the sensor (9) among the plurality of ground sensors (9) that is in contact with the ground from the ground portion to the mowing portion (1) are maintained at the set height. A raising and lowering structure of a harvesting part of a combine, which is provided with an automatic lifting means for automatically raising and lowering the cutting part (1). 2. The combine harvesting part lifting structure according to claim 1, wherein the plurality of ground sensors (9) can be constantly switched to the ground state by stopping the operation of the posture switching means (17). 3. The combine harvesting part raising / lowering structure according to claim 1, wherein a space (K) is formed between adjacent ones of said plurality of ground sensors (9).