JP3418303B2 - Thrower drainage device - Google Patents

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 helix for axially transferring and diffusing cutting straws.

[0002]

2. Description of the Related Art Usually, combine harvesters include one having a cutter device or a bundling device attached to the rear part of a threshing section, or one having both of them as a waste straw processing device after threshing. .

For example, the cutter device is mounted on the rear portion of the threshing portion 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. There is. A tension pulley is arranged in parallel with 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 discharge straw sent by the discharge straw chain. It can be shredded and reused as fertilizer.

The cutter device is surrounded by a cutter cover, and a lower cover is hung from the lower part of the cutter cover, and the lower cover hangs down the cut straw-shaped cutting straws. To ensure.

[0005]

By the way, the lower cover is obliged to have its lower end a predetermined distance or more (for example, 500 mm) from the lower side of the saw blade from the viewpoint of work safety. Has a shorter distance from the lower end of the lower cover to the ground.

Therefore, even if there is no problem when handling the grain culm while the combine harvester is running in a field or the like, when the grain culm is manually handled while the combine harvester is stopped, it is discharged from the lower cover. Fine discharge straws may be accumulated on the ground, and the tops of the accumulated straws may reach into the lower cover to cause straw clogging.

[0007] In this case, for example, by detecting the accumulated amount of the discharged straw by a contact type sensor arranged below the cutter device and issuing an alarm, the operator recognizes the accumulated state of the discharged straw and moves the combine to another position. Means such as moving it are adopted.

By the way, since the discharged straw is generally soft, it may be returned by reaction force immediately after it once acts on the sensor plate of the sensor. However, even if the discharged straw is deposited in a small amount, the sensor is momentarily removed. In some cases, it may be turned on. Therefore, it is necessary to prevent the detection of such unstable discharge straws and to reliably detect the accumulation amount of the discharge straws above the predetermined level and issue an alarm.

The present invention has been made in order to solve such a problem, and an object of the present invention is to provide, when a predetermined amount or more of cutting straws transferred by a diffusion spiral below a cutter are accumulated during manual handling work. The object of the present invention is to provide a waste straw device for a thresher capable of reliably detecting this and issuing an alarm.

[0010]

In order to achieve this object, the present invention has a cutter (26, 28) for cutting waste straw at the rear part of the threshing part (16), 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 underneath, it is arranged on the tip side in the axial direction of the diffusion spiral (32) and accumulated on the ground. A deposition sensor ( 51 ) which is displaced by the urging pressure of the cutting straw to be turned on, and an alarm signal is sent on condition that the deposition sensor ( 51 ) is continuously turned on for a predetermined time or more. Control unit (64)
And are provided.

The present invention also provides the deposition sensor ( 51 ).
Is an axis (4) that is substantially parallel to the axis of the diffusion spiral (32).
6a) as the center of the machine due to the urging pressure of the cutting straw
In addition to having a sensor plate (46) that rotates in one direction,
Fold the upstream side of the cutting board (46) in the transfer direction of the cutting straw.
The bending tip (47b) is different from the bending base (47a).
An inclined surface (47) inclined by a predetermined angle toward the upstream side is formed, and the cutting straw can be sensed when the cutting straw comes into contact with the inclined surface (47).

(Operation) In the above configuration, for example, the combine (10) to which the present invention is applied is provided with the cutters (26, 28) for cutting straws at the rear of the threshing section (16). (2
(6, 28) below, a diffusion spiral (3) that transfers the cutting straw dropped by the action of gravity in the axial direction and diffuses it around.
2) is provided, and has a sensor plate (46) on the tip side in the axial direction of the diffusion spiral (32), which is displaced by being pushed by the biasing pressure of the cutting straw accumulated on the ground.
The deposition sensor ( 51 ) that is turned on by the displacement of the plate (46) is arranged.

[0013] Then, the association with the rotation of the diffusion spiral (32), although cut straw is fed in the axial direction tip side by the urging pressure of a predetermined amount or more cutting straw deposited on the axial tip side, wherein When the deposition sensor ( 51 ) continuously maintains the ON operation state for a predetermined time or longer, an alarm signal is sent from the control unit (64) to issue an alarm. As a result, the operator can check the accumulation state of the cutting straws and take necessary measures.

The deposition sensor ( 51 ) is a diffusion sensor.
Centering on an axis (46a) that is substantially parallel to the axis of the sensor (32)
And a sensor that rotates to the rear of the machine due to the urging pressure of the cutting straw
It has a plate (46) and is mounted on this sensor plate (46).
Upstream portion along the transfer direction of that cut straw, bent base end
The bent tip portion (47b) is located upstream of the portion (47a).
Since the inclined surface (47) is inclined toward the side by a predetermined angle (α °) , the cutting straw comes into contact with the inclined surface (47) by the feeding action of the diffusion spiral (32), Since the biasing force is exerted on the inclined surface (47), the accumulation state of the cutting straw is detected before the cutting straw is wound around the spiral,
The sensing performance of the sensor is improved.

The reference numerals in parentheses described above are shown for reference to the drawings, and do not limit the structure of the present invention at all.

[0016]

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 for supporting the machine body 12,
14, a threshing part 16 for threshing the cut grain culm, and a straw discharging device 18 provided at the rear part of the threshing part 16.

As shown in FIGS. 1 to 4, the discharge straw device 18 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, on the terminal side 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 blades 26 and the saw blades 28 are arranged so as to face each other while being displaced in an alternating manner.

A lower cover 30 is integrally provided under 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 32a at its center 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 power by a driven pulley 36 attached to an 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.

A tension pulley 42 is provided in parallel with the belt 40. When the tension pulley 42 is pressed against the belt 40, the rotation of the cutter shaft 22 is transmitted to the driven pulley 38, whereby the diffusion spiral shaft. 32a is adapted to rotate. Since there are long culms and short culms in the discharged straws, the rotation of the diffusion spiral shaft 32a causes the cut straws cut and accumulated on the ground to be transferred and diffused toward one side in the axial direction. .

In the present embodiment, a deposition sensor which is disposed on the tip side in the axial direction of the diffusion spiral 32 and which is displaced by the urging pressure of the cutting straw accumulated on the ground to be turned on, and the deposition sensor are continuous. on condition that it is turned on operating conditions more than a predetermined time and is characterized in that it comprises a control unit for sending the alarm signal.

As shown in FIGS. 1 to 4 described above, the inner side of the lower cover 30 is fixed to the tip side in the axial direction of the diffusion spiral 32 (the right end side in FIG. 3, so-called the tip side of the soybean culm). The metal fitting 44, the plate-shaped sensor plate 46 via the rotary shaft 46a attached to the metal fitting 44, and the switch 50.
Deposition sensor 51 having mounted. This cell
The sensor plate 46 is constantly urged toward the diffusion spiral 32 side by a spring 48 at a predetermined pressure.

The discharged straws cut by the cutters 26 and 28 are accumulated on the ground below the lower cover 30, and when the accumulated amount exceeds a predetermined value, the accumulated cut straws are spread by the diffusion spiral 32. Is transferred to the tip side in the axial direction while being diffused by the surroundings, and the pressing force applied to the cutting straw at that time increases, and the cutting straw presses the sensor plate 46 toward the rear of the machine body (direction A in FIG. 4). Energize.

Further, as shown in FIGS. 1 to 3, the deposition sensor 51 is rotated substantially parallel to the axis of the diffusion spiral 32.
Rear of the fuselage due to the urging pressure of the cutting straw around the shaft 46a
The sensor plate 46 that rotates in the direction of
At the upstream side in the transfer direction of the cutting straw in 6 , the bending base end portion
47a, the bent tip portion 47b is directed toward the upstream side.
An inclined surface 47 (see FIG. 2 ) inclined by a predetermined angle (α ° ) is formed. As a result, as the cutting spiral is fed to the tip side in the axial direction by the diffusion spiral 32, the inclined surface 4
When the cutting straw comes into contact with 7, the inclined surface 47 is pushed outward (toward the rear of the machine) by the cutting straw before the cutting straw winds around the diffusion spiral 32, so that the cutting straw is more easily sensed. ing.

On the other hand, as shown in FIGS. 1 and 2, when a deposition sensor 51 is formed on the side of the lower cover 30,
Both detect the amount of rotation of the rotary shaft 46a that is greater than or equal to a predetermined value.
The switch 50 is provided so as to detect when the sensor plate 46 rotates by a predetermined amount or more.

FIG. 5 shows a connection state of the alarm generation circuit. As is apparent from the figure, the switch 50 for detecting the rotation of the sensor plate 46 by a predetermined amount or more is provided with the controller 6.
4 and the command signal from the controller 64 is sent to the alarm device 6
2 and the alarm lamp 61.

The control unit 64 controls the deposition sensor 5
On condition that 1 is kept in the ON operating state for a predetermined time or more in succession, and sends an alarm signal to the alarm device 62 and the alarm lamp 61.

FIG. 6 is a diagram showing an operation timing chart in the present embodiment.

When a predetermined amount of cutting straw is accumulated on the ground below the cutters 26 and 28, the urging pressure of the cutting straw causes
The sensor plate 46 is switch 50 rotates to turn on operation. At this time, since in general the volume of waste straw tip side than the strain base side (axial right side of the diffusion helix 32 in FIG. 3) (volume) is small, effect of deposit amount less turned on actuating the switch 50 However, when a large amount of manual handling is performed and a deep handling is performed, the switch 50 may be temporarily turned on even if the accumulated amount of the discharged straw is not so large.

Therefore, in such a case, the switch 5
By measuring the ON operation time of 0, when the value is less than or equal to the predetermined time (T ₁ ), the control unit 64 cuts the detection signal at this time so that the alarm is not activated, and the switch 50 The alarm is issued only when the on-operation time of is longer than a predetermined time (T ₁ ).

On the other hand, when deposited falling cut straw on the ground, the cutting straw is transported axially fore side by diffusion helix 32, become straw is deposited on the tip side, this cut straw, sensor The plate 46 is pushed and the switch 50
Turns on.

Since the straw is soft, it is difficult to maintain the ON state for a long time. However, when the ON operation time is longer than the predetermined time (T ₁ ) , an alarm signal is sent and during that period, the alarm is issued. Lamp 61 lights up and alarm device 6
2 is working. As a result, an alarm is issued and the operator recognizes that the cutting straw has accumulated under the cutter.

FIG. 7 is a diagram showing a control flow chart, and the operation of the present embodiment will be described below with reference to this diagram.

In step S1, the present deposition sensor
51 switch 50 is ON or OFF, and it is OFF
If so, the process proceeds to step S7, and if ON, the process proceeds to step S2. In step S2, the previous deposition sensor 51
It is determined whether the switch 50 is ON or OFF. If it is OFF, the process proceeds to step S3 to set the delay timer time T ₁ and then the process proceeds to step S4. If it is ON, the process proceeds directly to step S4.

In step S4, the timer time T
₁ determines whether zero or not, unless the timer time T ₁ is 0, subtracts the constant a from the timer time T ₁ proceeds to step S5, if the timer time T ₁ is 0, the alarm output time in step S6 After setting the extension timer time T ₂ for extending the value, the process proceeds to step S7.

[0037] In the step S7, the stretching timer time T ₂ is determined whether 0 or not, proceed to stretching timer time T ₂ is not zero step S8, alarms and alarm lamp 61 62 If the delay timer time T ₂ is 0, the process proceeds to step S9 and the constant b is subtracted from the delay timer time T ₂ . Thus, the deposition sensor 5
1 of the switch 50, with the proviso that has reached a predetermined time (T ₁₎ or on the operating state, and sends an alarm signal.

In the present embodiment, as shown in FIG. 3 described above, the ear on the right side in the axial direction of the diffusion spiral shaft 32a.
Blade leading plates 34a, 34a are formed on the front side and in the axially middle portion, and the blade leading plates 34a are spiral blades 34 wound in a spiral shape on the diffusion spiral shaft 32a.
Is formed in a flat plate shape without being wound around the diffusion helix shaft 32a, and the blade-extracting plates 34a, 34a are arranged so as to be inclined in opposite directions to the diffusion helix shaft 32a.

The spiral blades 34 serve to feed the cutting straws to the surroundings while feeding the cutting straws to the right, and to discharge the cutting straws toward the inner wall of the lower cover 30 by means of the blade take-out plate 34a. A plate 52 is attached to each of the inner walls of the lower cover 30 near each of the blade output plates 34a.
The surrounding space of 4a is narrowed, for example, the vane plate 3
The cutting straws diffused by 4a collide with the plate 52 and then bounce off and are discharged.

Further, as shown in FIG. 8, when carrying out the manual handling work of the grain culm, the manual handling rail 56 is rotated and opened so as to move the grain culm along the threshing feed chain 54. However, an opening sensor 58 is provided on the rear body of the handrail 56, and the opening sensor 58 is
When the handrail 56 is opened, the handrail 5 is released.
6 presses the opening sensor 58, and the pressing force turns on the opening sensor 58.

Next, the operation of this embodiment will be described.

When the grain culm is manually handled, the discharged straws are cut by the cutters 26 and 28 and discharged downward. When the cut straws are deposited on the ground, the cut straws are cut by the cutters 26, 28. The outer peripheral portion of the diffusion helix 32 provided below 28 is reached. Thus, the amount of deposition cutting straw comes increased, the cut straw is transported axially fore side by rotation action of diffusion helix 32, the blade pulling plate 3 in the tip side
The cutting straws are concentrated below 4a.

Thus, the cutting straws deposited on the tip side in the axial direction press the sensor plate 46 in the direction of arrow A in FIG.
The sensor plate 46 is rotated rearward of the machine body about the shaft 46a. As a result, the switch 50 (see FIGS. 1 and 2) connected to the rotary shaft 46a of the sensor plate 46 is activated, and an alarm signal is issued to the alarm device 62 and the like via the control unit 64.

In this case, when the accumulated amount of cutting straw is small, the action of turning on the switch 50 does not work, but when a large amount of manual handling and deep handling are performed, the accumulated amount of cutting straw is reduced. Even if not so many, the switch 50 may be temporarily turned on. Therefore, in order to avoid issuing an alarm when the amount of cutting straw accumulated is small in this way, the control unit 64 measures the ON time of the switch 50 of the accumulation sensor 51 , and the ON time at this time is set to a predetermined value. only when it is the value (T ₁₎ or more, so that sending an alarm signal.

For this reason, when the alarm lamp 61 is turned on and the alarm device 62 is activated, the operator stops the manual handling work in that state and takes measures such as advancing the combine. As a result, the aircraft body moves, so the lower cover 30
The cutting straw disappears inside, and the sensor plate 46 is returned to its original position by the action of the spring 48, and the manual handling work can be continued.

[0046] Incidentally, by the inclined surface 47 is formed on the sensor plate 46, the axial ear by diffusion helix 32
Due to the feeding action to the leading side, the cutting straws are accumulated and detected early before being wrapped around the spiral blades 34.

Further, the sensor plate 46 has its rotation fulcrum 46a.
Is provided on the rear side of the fuselage with respect to the diffusion helix 32, and even when the cutting straw is wrapped around the blade-extracting plate 34a, it can be sensed quickly, so that the load on the diffusion helix shaft 32a is also reduced. .

[0048]

As described above, the present invention has 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 is provided below the cutter. In the waste straw device of the threshing machine, which is arranged on the tip side in the axial direction of the diffusion spiral, the deposition sensor which is displaced by the biasing pressure of the cutting straw accumulated on the ground and is turned on, and the deposition sensor are continuously connected. By providing a control unit that sends out an alarm signal on condition that it has been in an ON operation state for a predetermined time or more, it is soft while preventing a false alarm due to unstable accumulation of cutting straw under the cutter. It is possible to reliably detect the accumulation state of a predetermined amount or more of cutting straw.

Further, the deposition sensor has an axis of the diffusion helix and
The fuselage is urged by the cutting straws about axes that are almost parallel.
It has a sensor plate that rotates backward and
In the transport direction upstream side of the definitive cutting straw, pairs bent base end portion
By forming an inclined surface in which the bent tip portion inclines at a predetermined angle toward the upstream side, the axial direction by the diffusion spiral is formed.
Based on the feeding action to the tip side, the accumulation state of the cutting straws is detected, and is detected before the cutting straws are wound around the spiral, so that the detection accuracy of the sensor can be improved.

[Brief description of drawings]

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

FIG. 2 is a perspective view of an essential part of FIG.

FIG. 3 is a front view of the exhaust straw processing device as viewed from the rear of the machine body.

FIG. 4 is a side sectional view of FIG.

FIG. 5 is a diagram showing a connection state of an alarm generation circuit.

FIG. 6 is a diagram showing an operation timing chart based on a deposition sensor.

FIG. 7 is a diagram showing a control flowchart in the present embodiment.

FIG. 8 is a diagram showing a relationship between a handrail and a switch mounting position showing an open state of the handrail.

[Explanation of symbols]

10 combine 12 aircraft 16 Threshing Department 18 Discharge straw device 26 star wheel blades 28 Saw blade 30 bottom cover 32 diffusion spiral 32a diffusion spiral axis 34 spiral blades 46Sensor plate 46a rotating shaft 47 slope47a   Bending base end 47b   Bend tip 50 switch51     Deposition sensor 56 handrail 61 alarm lamp 62 alarm 64 control unit

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) A01F 12/40 302

Claims (2)

(57) [Claims] 1. A threshing device for a threshing machine, comprising a cutter for cutting waste straws at the rear part of the threshing section, and a diffusion spiral for axially transferring and diffusing the cut straws provided below the cutter. A deposition sensor that is arranged on the tip side in the axial direction of the diffusion spiral and is turned on by being displaced by the biasing pressure of the cutting straw that has accumulated on the ground, and the deposition sensor has been continuously turned on for a predetermined time or longer. On the condition that the alarm signal is transmitted,
An exhaust straw device for a thresher, which is characterized in that: 2. The deposition sensor is an axis of the diffusion helix.
For the urging pressure of the cutting straw around an axis that is almost parallel to the line
In addition to having a sensor plate that rotates more toward the rear of the machine,
In the transport direction upstream side of the cut straw in capacitors plate, bending group
The bent tip is a predetermined angle toward the upstream side with respect to the end.
The discharging straw device for a threshing machine according to claim 1, wherein an inclined surface is formed so that the cutting straw can be sensed by contacting the cutting straw with the inclined surface.