JPH09271252A - Waste straw device for thresher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To sense that cut straws discharged on the ground are piled up for more than a prescribed amount in a hand-feeding threshing operation of culms. SOLUTION: In a combine 10, cutters for cutting waste straws are provided on the rear part of a threshing part 16 and a spreading helix for transferring the cut straws discharged on the ground and piled up in an axial direction and spreading them around is provided on the lower part of the cutters. Also, a pile-up sensor 46 for sensing the pile-up amount when the cut straws piled up on the ground are piled up for more than the prescribed amount is arranged on the axial direction terminating side of the spreading helix, the cut straws are sent to one side in the axial direction accompanying the rotation of the spreading helix, and before the clogging of the cut straws is generated on the side where they are sent, it is detected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a throwing straw device for a threshing machine, and more particularly to a throwing straw device for a threshing machine provided with a diffusion spiral for transferring and diffusing cut straw accumulated on the ground.

[0002]

2. Description of the Related Art Generally, as a waste straw processing device after threshing, there is a combine combiner equipped with either a cutter or a bundling device at the rear part of the threshing section, or with both of them.

For example, the cutter is mounted on the rear portion of the threshing section of the combine and is provided with a driven pulley and a saw blade, and a belt is wound between the driven pulley and the spiral shaft of the machine body. ing. Then, a tension pulley is arranged in parallel on the belt, and when the tension pulley is pressed against the belt, the rotation of the spiral shaft is transmitted to the driven pulley to rotate the saw blade, and the waste straw sent by the waste straw chain is removed. It is shredded and reused as fertilizer.

Further, a lower cover is attached to the lower part of the cutter so as to secure the dropping position of the cut straw-shaped discharge straw.

[0005]

By the way, the lower end of the lower cover is required to be at least a predetermined distance (for example, 500 mm) below the saw blade from the viewpoint of work safety. Has a shorter distance from the lower end of the lower cover to the ground.

In this case, even if there is no problem when handling the grain culm while the combine is running, when handling the grain culm by hand while stopped, the fine drainage straws discharged from the lower cover are There was a problem in that it was deposited on the ground, and its top reached into the lower cover, causing clogging.

The present invention has been made in order to solve such a problem, and an object thereof is to detect when a predetermined amount or more of cut straws discharged on the ground in a manual operation are accumulated. An object is to provide a straw discharging device for a threshing machine.

[0008]

In order to achieve this object, the present invention has a cutter (26, 28) at the rear of the threshing unit (16) for cutting off the waste straw, and the cutter (26, 28)
In the waste straw device of the threshing machine, which is provided with a diffusion spiral (32) for axially transferring and diffusing the cutting straw discharged and accumulated on the ground below the axis of the diffusion spiral (32) in the axial direction end side. A deposition sensor (46) for detecting a deposition amount above the ground of the cutting straws is arranged.

Preferably, the diffusion helix (32) is
A spiral blade (34) is formed around the central axis (32a), and a blade take-out plate (34a) is arranged at least at the axial end portion thereof.

Further, preferably, on the back side of the manual handling rail (56) which is opened during the manual handling work of the grain stalk, an opening sensor (for detecting the open state of the manual handling rail (56) ( 5
8) is provided, and an alarm (62) is issued when the open sensor (58) is in the ON operation state and the deposition sensor (46) is in the ON operation state.

(Operation) In the above configuration, for example, the combine (10) to which the present invention is applied has a threshing part (1
6) A cutter (26, 28) for cutting a drainage straw is provided at the rear part, and the discharged and accumulated cutting straw is axially transferred below the cutter (26, 28) and diffused to the surroundings. A diffusion helix (32) is provided. And
A deposition sensor (46) that detects a predetermined amount or more of deposition from the ground of the cutting straw is disposed on the axial end side of the diffusion spiral (32), and cuts as the diffusion spiral (32) rotates. The straw is fed to one side in the axial direction and is detected before the cut straw is clogged on the one side.

Further, the diffusion spiral (32) has the blade take-out plate (34a) arranged at the axial end portion or the middle portion thereof, so that the blade take-out plate (34a) ejects the cutting straw vigorously. Since the accumulated state is substantially constant, the accumulated state of the cutting straw becomes uniform, and the possibility of erroneous detection is reduced.

Further, on the rear side of the handrail (56) which is opened during the manual operation of the grain culvert, the handrail (5) is provided.
An open sensor (58) for detecting the open state of 6) is provided, and an alarm is issued only when the open sensor (58) is in the ON operation state and the deposition sensor (46) is in the ON operation state. Since (62) is emitted, the operator can know the clogging of the cutting straw by an alarm.

The above-mentioned reference numerals in parentheses are shown for reference to the drawings and do not limit the structure of the present invention.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a side view of a rear portion of a combine to which the present invention is applied. In FIG.
A pair of left and right crawler traveling devices 14 supporting the body 12;
14, a threshing unit 16 for threshing the harvested culm, and a straw removing device 18 provided at the rear of the threshing unit 16.

As shown in FIGS. 1 to 4, the discharge straw device 14 includes a cutter shaft 22 and a saw blade shaft 24, which are arranged substantially parallel to each other and extend in the lateral direction of the machine body, at the end of the discharge straw chain 19. A large number of star wheel blades 26 and saw blades 28 are mounted on the cutter shaft 22 and the saw blade shaft 24 at predetermined intervals. The star wheel blade 26 and the saw blade 28 are housed in the cutter cover 20. The star wheel blade 26 and the saw blade 28 are arranged to face each other in a state of being alternately displaced.

A lower cover 30 is integrally provided below the cutter cover 20, and a diffusion spiral 32 is accommodated in the lower cover 30. This diffusion spiral 32
Has a diffusion spiral shaft 32aa in the center thereof and a spiral blade 34 formed around the diffusion spiral shaft 32a.

In the cutter shaft 22, a belt is wound around a second spiral shaft (not shown) inside a machine body to transmit a power to a driven pulley 36 attached to the end of the cutter shaft 22, and the power is transmitted to the cutter shaft 22 and the cutter shaft 22. Power is transmitted to and from the diffusion spiral shaft 32a by a belt 40 wound between a driven pulley 36 and a driven pulley 38 attached to the end of the diffusion spiral shaft 32a.

The belt 40 has a tension pulley 4
When the tension pulley 42 is pressed against the belt 40, the rotation of the cutter shaft 22 causes the driven pulley 3 to rotate.
8 so that the diffusion spiral shaft 32a rotates. Since there are both long culms and short culms in the drained straw, by rotating the diffusion spiral shaft 32a, the cut straw that has been cut and deposited on the ground is transferred and diffused toward one side in the axial direction. .

The present invention is characterized in that a deposition sensor is arranged on the axially terminating side of the diffusion spiral 32 to detect a deposition amount of the cutting straw above a predetermined level on the ground.

As shown in FIGS. 1 to 4 described above, on the terminal side in the axial direction (rightward direction in FIG. 3) of the diffusion spiral 32,
A metal fitting 44 fixed inside the lower cover 30 and a plate-shaped deposition sensor 46 are attached via a rotary shaft 46 a attached to the metal fitting 44. This accumulation sensor 46
Is constantly urged inward (toward the diffusion spiral 32 side) by a spring 48 at a predetermined pressure.

Then, the cut discharge straws are attached to the lower cover 3.
When the accumulated cutting straw is accumulated on the ground below 0 and becomes a predetermined value or more, the accumulated cutting straw is diffused by the diffusion spiral 32, and the pressing force applied to the cutting straw at that time becomes large and the accumulation is increased. The sensor 46 is pressed outward (direction A in FIG. 4).

On the other hand, on the side of the lower cover 30, there is provided a switch 50 for detecting a rotation amount of the rotation shaft 46a which is larger than a predetermined amount, and when the deposition sensor 46 rotates a predetermined amount or more, it is detected. It is supposed to do.

According to the present invention, the diffusion spiral 32 is
The spiral blade 34 is formed around the central axis 32a, and a blade take-out plate is arranged at least at the axial end portion thereof.

As shown in FIG. 3 and FIG. 7, in the present embodiment, blade spreading plates 34a, 34a are formed at the axially right end portion of the diffusion spiral shaft 32a and the axially intermediate portion. . The blade delivery plate 34a is formed by winding the spiral blade 34 wound around the diffusion spiral shaft 32a in a spiral shape into a flat plate without being wound around the diffusion spiral shaft 32a. Then, in FIG. 3, each blade output plate 34a,
34a are arranged so as to be inclined in mutually opposite directions with respect to the diffusion spiral shaft 32a, and in FIG.
4a shows an embodiment in which 4a is arranged substantially parallel to the diffusion spiral shaft 32a.

The spiral blade 34 diffuses the cutting straw while feeding it to the right, and the blade take-out plate 34a discharges the cutting straw toward the inner wall of the lower cover 30. Plates 52 are attached to the inner wall of the lower cover 30 in the vicinity of each of the blade extension plates 34a, respectively.
The space around 4a is narrow, for example,
The cut straw dispersed by 4a collides with the plate 52 and then rebounds and is released.

Further, according to the present invention, an open sensor for detecting an open state of the manual handling rail is provided on the back side of the manual handling rail which is opened during the manual handling work of the grain culm. Is in an on-operation state, and when the deposition sensor 46 is in an on-operation state, an alarm is issued.

As shown in FIG. 5, when the grain culm is manually handled, the handrail rail 56 is opened to move the grain culm along the threshing feed chain 54. An opening sensor 58 is provided on the rear body of the rail 56. When the handrail 56 is released, the open sensor 58 presses the open sensor 58, and the open force of the open sensor 58 is turned on.

FIG. 6 shows a connection state of the alarm generation circuit. As is apparent from the figure, the battery 60 and the alarm device 6 are connected.
A switch 50 for detecting rotation of the deposition sensor 46 by a predetermined amount or more and the open sensor 58 are connected in series to a circuit connecting the two.

That is, during the manual handling work, the manual handling rail 56 is raised to perform the work.
Indicates that the handrail 5 indicates that the handrail is being operated.
6 is open, and the switch 50 is activated only when the switch 50 indicating the rotation of the deposition sensor 46 by a predetermined amount or more is turned on.

Next, the operation of the present embodiment will be described.

When the manual operation is performed, the cutting straws are discharged rearward from below the diffusion spiral 32. When the cutting straws are accumulated below, the cutting straws reach the outer periphery of the diffusion spiral 32. In this case, the cutting straws are brought to the right side (the axial end side) by the rotating action of the diffusion spiral 32, so that the cutting straws are concentrated below the blade projection plate 34a, and the deposition sensor 46 is moved in the direction of arrow A in FIG. Rotate to.
As a result, the switch 50 is activated and an alarm is issued.

When the operator stops the manual operation in that state and advances the combine, the cutting sensor disappears in the lower cover 30, so that the deposition sensor 46 causes the spring 4 to move.
By the action of 8, it is possible to return to the original position and continue the manual handling work.

The deposition sensor 46 has its rotation fulcrum provided at the rear of the machine body with respect to the diffusion spiral 32 and can detect swiftly even when the cutting straw of the blade take-out plate 34a is wrapped around. The load on 32a is also reduced.

Further, since the alarm is issued only when the threshing clutch is engaged, the alarm is not issued, for example, when the vehicle is traveling on the road, and therefore no troubles due to false alarms occur.

[0037]

As described above, according to the present invention, the deposition sensor for detecting the amount of deposition of the cutting straw above the ground on the axial end side of the diffusion spiral provided below the cutter for cutting the exhaust straw. By arranging the above, it is possible to detect the accumulation state of a predetermined amount or more of the cutting straw in the lower portion of the diffusion spiral, thereby preventing clogging by the cutting straw.

In this case, especially in a wet field, the gap between the diffusion spiral and the paddy field becomes small and clogging by the cutting straw becomes quick, so that the detection effect is large.

Further, in the diffusion spiral, in addition to the spiral blade, a blade projection plate is arranged at the axial end portion,
The accumulation state of the cutting straw below the diffusion spiral can be made substantially constant, and the detection accuracy of the deposition sensor can be improved.

Further, an open sensor for detecting the open state of the handrail is provided, and an alarm is issued when the open sensor is in the on operation state and the deposition sensor is in the on operation state. As a result, no alarm is issued in a normal state other than the manual operation, and good work can be performed without false alarm.

[Brief description of drawings]

FIG. 1 is a side sectional view of a rear portion of a combine to which the present invention is applied.

FIG. 2 is a perspective view of a main part of FIG.

FIG. 3 is a front view of the waste straw processing apparatus as viewed from the rear of the machine.

FIG. 4 is a side sectional view of FIG.

FIG. 5 is a view showing a relationship between a handrail and a switch mounting position showing an open state of the handrail.

FIG. 6 is a diagram showing a connection state of an alarm generation circuit.

FIG. 7 is a diagram showing an embodiment of a vane plate.

[Explanation of symbols]

 10 Combine 12 Airframe 16 Threshing Part 18 Exhaust Straw Device 26 Star Wheel Blade 28 Saw Blade 30 Lower Cover 32 Diffusion Spiral 32a Diffusion Spiral Shaft 34 Spiral Blade 34a Blade Outlet Plate 46 Deposition Sensor 50 Switch 56 Hand Rail 58 Open Sensor 62 Alarm vessel

Claims (3)

[Claims] 1. A threshing provided with a cutter for cutting waste straws at the rear of the threshing section, and a diffusion spiral for axially transferring and diffusing the cut straws discharged and accumulated on the ground below the cutter. In the waste straw device of the threshing machine, a deposition sensor for detecting a deposition amount of the cutting straw above a predetermined amount from the ground is arranged on the axial end side of the diffusion spiral. 2. The threshing machine according to claim 1, wherein the diffusion spiral has spiral blades formed around a central axis, and a blade projection plate is arranged at least at an axial end portion thereof. Discharging straw device. 3. An open sensor for detecting an open state of the manual handling rail is provided on the back side of the manual handle rail that is opened during manual handling work of the grain culm, and the open sensor is in an on-operation state. And a warning is issued when the accumulation sensor is in an ON operation state.