JP2003052226A - Grain culms-conveying apparatus of combine harvester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a grain culms-conveying apparatus with which grain culms reaped before a time when a reaping operation is interrupted can be carried out to the end of a feed chain of a threshing part. SOLUTION: This grain culms-conveying apparatus is provided with a controller 85 constituted so as to continue driving of a pre-treating part and the threshing part for a predetermined time required to convey grain culms from a position of a main sensor 41 to the end of the feed chain after the output of the main sensor 41 additionally provided in a threshing depth conveying device is changed from ON to OFF when a combine harvester is temporarily stopped or backward operation for direction change is carried out. Thereby, disturbance of conveyance and overspill of culms in a conveying touch part can be eliminated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combine grain culm transporting device for transporting grain stalks cut by a pretreatment section toward a threshing section.

[0002]

2. Description of the Related Art In a combine harvester, grain cutting and threshing of grain culms are performed at the same time. Therefore, a grain shaving unit and a transport unit are provided in a pretreatment unit, and grain culms cut by the slicing unit are sequentially transferred to the threshing unit. It is designed to feed into the feed chain. In the carrying section, a main sensor for detecting the harvested grain culm,
Provided with a stock origin sensor and a tip sensor to detect the tip of the cut grain culm, based on the detection output of the main sensor, the stock origin sensor and the tip sensor operate to detect the tip of the cut grain culm. , Depth control is performed to control the passage position of the tip of the grain culm relative to the saw barrel.

Even when the work for cutting grain culms is continued,
The harvest operation may be interrupted due to a change in direction, and the combine may be moved backward, or the combine may be stopped by a meeting or the like. At this time, in the combine configured to transmit the rotation of the HST of the transmission to the pretreatment section and the threshing section via the one-way clutch, the transport section and the feed chain of the pretreatment section with the grain culms remaining inside are combined. Will be stopped.

[0004]

When the cutting work is restarted with the grain culm remaining in the transport section of the pretreatment section as described above, the cutting height of the grain culm changes when the grain cutting is restarted. Misalignment occurs between the cut grain culm and the newly cut grain culm, and transport irregularity and cutter clogging occur, and grain spillage occurs at the transport touch unit and the like.

When it is desired to feed the grain culm remaining in the transport section of the pretreatment section to the threshing section when the combine is moved backward or when the combine is stopped, the combine sub-transmission is neutralized. With the combine stopped, the main transmission (HST) is moved forward, and the pre-processing section and the threshing section are driven, which complicates the operation of the combine.

Further, if the structure is such that the pretreatment section and the threshing section are always driven each time the combine is moved backward, not only is the energy wasted, but more than necessary driving noise is generated.
It will give the driver a feeling of strangeness.

In view of the above-mentioned circumstances, the present invention, when the combine is moved backward by changing the direction or the like, irrespective of the moving direction of the combine or the movement / stop, the grain stalks cut by the pretreatment section are removed from the threshing section. An object of the present invention is to provide a combine grain culm transporting device for transporting to a rear end of a feed chain.

[0008]

[Means for Solving the Problems] To achieve the above object, the first aspect of the present invention conveys the cut grain culm from the pretreatment section (16) to the threshing section (45). In the grain culm conveying device of the combine (10), when the traveling direction of the combine (10) is switched from forward to reverse or when the traveling is stopped, the grain stalks cut by the pretreatment unit (16) are threshed. The pretreatment section (1) for a predetermined time required to convey the feed chain (46) to the end of the feed chain (46).
6) and a control device (85) for continuing the drive of the threshing unit (45), which is a combine grain culm transporting device.

Further, according to a second aspect of the present invention, the control device (85) has a saw depth conveying means (3) of the pretreatment section (16).
6) is provided with a main sensor (41) for detecting the presence or absence of grain culm, and when the traveling direction is switched from forward to reverse or when traveling is stopped, the main sensor (4)
Only when the output of 1) is ON, the pretreatment unit (16) and the threshing unit (45) are continuously driven, and after the output of the main sensor (41) is changed from ON to OFF, the pretreatment is further performed. The combine grain culm conveying device according to claim 1, characterized in that the drive of the section (16) and the threshing section (45) is continued for the predetermined time.

Further, claim 3 of the present invention is directed to the engine (13) of the combine (10), the pretreatment section (16) and the threshing section (4) driven by the engine (13).
5) A continuously variable transmission (72) for pretreatment drive is provided between the above and 5).

The numbers in parentheses are for convenience of showing the corresponding elements in the drawings, and the present description is not limited to the description in the drawings.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1 is a cross-sectional side view of a combine implementing the present invention, FIG. 2 is a drive system diagram of the combine shown in FIG. 1, FIG. 3 is a control system diagram of the combine in FIG.
FIG. 4 is a characteristic diagram showing the relationship between the traveling speed of the combine and the conveying speed of the pretreatment unit and the threshing unit, FIG. 5 is a flowchart showing the control process, and FIG. 6 is a plan view showing the arrangement of the back switch. is there.

In FIG. 1, a combine 10 has a body 12 supported by a pair of left and right crawler traveling devices 11, 11. Front part of this fuselage 12 (left side of Fig. 1)
An engine 13 is mounted on either the left or right side of the. A driver's seat 15 is arranged above the engine 13.

In front of the machine body 12 (left side in FIG. 1)
A pre-processing unit 16 for cutting grain culms is supported by the vertically movable unit. Further, a threshing unit 45 for threshing the cut grain culms and selecting the threshed grains is arranged on the other side of the front portion of the machine body 12 on the other side.

Then, the crawler traveling devices 11, 1
1, the pretreatment unit 16 and the threshing unit 45, the engine 13
The combine 10 is driven, and the grain culm is mowed and threshing is performed.

The pretreatment unit 16 directs the raising device 26 for raising the laid grain culm, the scraping device 31 for scraping the cut grain culm, and the cut grain culm to the threshing unit 45. A transporting device 36 for transporting and adjusting the position of the grain culm is provided, and its operation base end side is rotatably supported by a transmission shaft case 17 arranged in front of the machine body 12.

The transmission case 19, which extends from the transmission shaft case 17 toward the vehicle body 12 obliquely forward and downward of the vehicle body 12, is transmitted by expansion and contraction of a hydraulic cylinder 20 disposed at an intermediate position in the longitudinal direction. It swings around the shaft case 17. The transmission shaft case 17 is provided with a lift potentiometer 21 that detects the amount of rotation of the transmission case 19.

A transmission shaft cylinder extending below the transmission case 19 in the left-right direction of the machine body 12 (front-back direction in the plane of FIG. 1) and orthogonal to the transmission case 19 in a substantially T-shape. 22 are integrally connected. This transmission shaft cylinder 22
A plurality of dividers 25 are integrally connected to the vehicle body 12 via a pretreatment frame 23 extending toward the front of the machine body 12 so as to weed the uncut grain culms, raise them, and guide them to the passage.

Further, below the dividers 25 at the left and right ends, there are directional sensors (not shown) which enable the combine 10 to run automatically. Behind the divider 25, the raising device 26 that raises the cultivated grain culm,
The pretreatment section 16 is provided in an inclined shape that rises from the front to the rear.

The raising device 26 includes a chain 27 with a claw.
And a plurality of pawls are attached to the chain 27 with pawls at predetermined intervals, and these pawls are raised to rotate upward in the case 29 to scoop up the grain culm. The claw chain 27 is driven by a drive system described later.

A cutting blade 30 is provided behind the raising device 26 and in the lower front portion of the transmission shaft cylinder 22 so as to be close to the ground and cut the root of the grain stem. The grain culm cut by the cutting blade 30 is scraped by the scraping device 31 and transferred to the rear.

The scraping device 31 includes a conveyor belt 32.
And the stock carrier transport star wheel 33, the stock carrier chain 35, etc., and the grain culms cut by the cutting blade 30 are scraped by the carrier belt 32 and the stock carrier star wheel 33 and moved to the respective paths. It is then clamped by the stock carrier transport chain 35 and taken over by the saw depth transport device 36 arranged behind the scraping device 31.

The saw depth conveying device 36 has a rear portion rotatably supported around the transmission shaft case 17 so that the saw depth can be adjusted, and conveys the tip side of the grain stem. It is provided with a tip transport chain 37 and a stock carrier chain 39 for carrying the stock side. The tip transport chain 37 and the stock carrier transport chain 39 are vertically movable integrally with the rear part as a fulcrum (in the direction of the arrow in the figure), and the starting end side thereof is the stock source of the scraping device 31. It extends above the terminal end of the transport chain 35 in the transport direction.

U attached to the saw depth conveying device 36
The pipe section 40 is provided with a main sensor 41 as a first detecting means for detecting the presence or absence of grain culms during transportation. The main sensor 41 uses, for example, an on / off switch to detect the presence or absence of grain culms during transportation. Further, the U pipe section 40 is provided with a stock origin sensor 42 as a second detecting means and a stock origin / head sensor including a head sensor 43. This stock origin / tip sensor detects the position of the tip of the grain culvert which is passed from the scraping device 31 to the saw depth conveying device 36.

In the threshing section 45, the feed chain 4
6 and the feed chamber 46 substantially parallel to the feed chamber 4
7, a saw cylinder 49 is rotatably disposed in the saw chamber 47 about a rotation axis extending in the front-rear direction of the machine body 12. Below the saw cylinder 49, a receiving net 50 for leaking threshered grains is provided, and below the receiving net 50, a swing selecting section 51 is arranged so as to be swingable back and forth. ing.

Then, due to the rocking action of the rocking / sorting section 51 and the sorting wind generated from the Karaji 52 and the suction fan 53, the grains mixed with the sprouts are sorted. The grains selected by the swing selection unit 51 are the No. 1 gutter 55 or 2 arranged below.
It is dropped and stored in the gutter 56. The grain culms that have been threshed by the saw cylinder 49 in the saw chamber 47 are taken over from the feed chain 46 to the culm chain 57 provided at the rear of the machine body 12 for processing.

The drive system of the combine 10 using the engine 13 (E / G) as a power source is constructed as shown in FIG. A transmission 59 (T / M) that constitutes a traveling drive system of the combine 10 is provided with an HST 60 that constitutes a main transmission, an auxiliary transmission 61 and a gear train 62, and drives the crawler traveling device 11. Engine 13
From the HST 60 to the HST 60, a belt 63 that is stretched between a pulley 13 b fixed to the output shaft 13 a of the engine 13 and a pulley 60 b fixed to the input shaft 60 a of the HST 60.
Transmission of power is carried out.

The drive shaft 65 is rotatably supported at a predetermined position of the combine 10. From the engine 13 to the drive shaft 65, a pulley 13c fixed to the output shaft 13a of the engine 13 and a pulley 65a fixed to the drive shaft 65.
Power is transmitted by the belt 66 that is stretched between the two. A work machine clutch 67 (tension clutch) is arranged on the belt 66.

The intermediate shaft 69 is rotatably supported at a predetermined position of the combine 10. From the drive shaft 65 to the intermediate shaft 69, a bevel gear 65b fixed to one end of the drive shaft 65.
Then, power is transmitted by the bevel gear 69a fixed to the intermediate shaft 69 so as to mesh with the bevel gear 65b.

From the intermediate shaft 69 to the saw cylinder 49, the intermediate shaft 6
Power is transmitted by a belt 70 that is stretched between a pulley 69b fixed to one end of the shaft 9 and a pulley 49b fixed to one end of an input shaft 49a of the saw cylinder 49.

The pretreatment transmission 71 is provided with an HST 72 which constitutes a pretreatment drive continuously variable transmission. Drive shaft 65
From the HST 72 to the pulley 6 fixed to the drive shaft 65
Power is transmitted by a belt 73 that is stretched between 5c and a pulley 72b fixed to an input shaft 72a of the HST 72. The HST 72 has an HST drive motor 75.

The pretreatment drive shaft 76 is rotatably supported at a predetermined position of the combine 10. From the pretreatment transmission 71 to the pretreatment drive shaft 76, it is bridged between a pulley 71d fixed to the output shaft 71c of the pretreatment transmission 71 and a pulley 76a fixed to the pretreatment drive shaft 76. The power is transmitted by the belt 77. A reaping clutch 79 (tension clutch) is arranged on the belt 77, and is configured to stop the pretreatment unit 16 while the threshing unit 45 is being driven, thereby enabling a handcuffing operation.

The pretreatment drive shaft 76 is a bevel gear 76b.
Via the bevel gear 37a that meshes with the bevel gear 76b.
Drive 9

The transmission shaft 80 is rotatably supported at a predetermined position of the combine 10. The pretreatment drive shaft 76
Power is transmitted to the transmission shaft 80 from the bevel gear 76c fixed to the pretreatment drive shaft 76 and the bevel gear 80a fixed to the transmission shaft 80 so as to mesh with the bevel gear 76c.

The transmission shaft 80 drives the cutting blade 30 and also has a gear 32a meshing with a gear 80b fixed to the transmission shaft 80 and a conveyor belt 32 of the scraping device 31 via a gear 32b meshing with the gear 32a. To drive.

The drive shaft 81 is rotatably supported at a predetermined position of the combine 10. The pretreatment transmission 7
From the output shaft 71c of No. 1 to the drive shaft 81. Chain 8
2, the transmission of power is performed. And the drive shaft 8
The feed chain 46 is driven by the sprocket 81b fixed to 1.

The control device 85 of the combine 10 is constructed as shown in FIG. That is, the control device 85 includes an input interface 86, a microcomputer 87, and an output interface 89, and is connected to the main switch 90 of the combine 10.

The input interface 86 includes a lift potentiometer 21 and a working machine clutch switch 9
2, reaping clutch switch 93, main sensor 41,
A lift shut switch 94, a handhold switch 95, a back switch 96, a T / M rotation sensor 97, an HST rotation sensor 98, an engine rotation sensor 99, etc. are connected.

The work implement clutch switch 92 is provided on a work clutch lever (not shown), and the combine 1
The work machine clutch 67 is switched so that the driving of 0 and the driving of the pretreatment unit 16 and the threshing unit 45 are interlocked or separated.

The reaping clutch switch 93 is provided on a reaping clutch lever (not shown), and the preprocessing unit 1
6 and the drive of the threshing unit 45 are switched so as to interlock or separate the cutting clutch 79.

The lift shut switch 94 is arranged on an operation panel (not shown), and when the pretreatment section 16 is raised to a predetermined height, the lift shut switch 94 stops driving the pretreatment section 16 and the threshing section 45. Select whether to enable or disable the function.

The hand-growing switch 95 is arranged on the operation panel and operates only the threshing section 45 so that the hand-growing work can be performed. When the power switch 95 is ON,
The hand-lamp lamp 102 is turned on to indicate that the threshing unit 45 is in the hand-feeding working state (that is, the state in which the pre-processing unit 16 is not interlocked).

The back switch 96 is arranged on a main gear shift operation lever (not shown) of the main transmission and selects the traveling direction of the combine 10. The T / M rotation sensor 97 is provided on the output shaft of the traveling HST 60 and detects the rotation thereof. The HST rotation sensor 98 is the H of the pretreatment transmission 71.
It is provided on the output shaft of ST72 and detects its rotation. The engine rotation sensor 99 counts the number of alternator pulses and detects the rotation of the engine 13.

Further, the output interface 89 is provided with a horn 101, a hand-operated lamp 102, and an HS for pretreatment conveyance.
The T drive motor 75 and the E / G stop solenoid 103 are connected.

In the combine 10 having such a configuration, after the combine 10 is put in the field, the combine 10 is moved forward with its direction oriented toward the arrangement direction of the grain stems. Then, the divider 25 is divided into the array of the culms, and the chain with nails 2
At 7 the grain culm is raised. The culm is cut (cut) by the cutting blade 30.

The harvested grain culm is conveyed by the conveyor belt 32 to the saw depth conveying device 36, and the saw depth conveying device 36 is conveyed.
Passed to. While being conveyed toward the feed chain 46 by the saw depth conveying device 36, the grain culm is detected by the main sensor 41, and the position of the tip of the grain culm is detected by the stock sensor 42 and the tip sensor 43. To be done. Then, based on the detection result, the saw depth conveying device 3 is set so that the tip of the grain culm is located between the stock sensor 42 and the tip sensor 43.
The position of the grain culm is adjusted by 6.

The grain culm is transferred from the saw depth conveying device 36 to the feed chain 46. Then, the grain culm is conveyed by the feed chain 46 so that the tips thereof pass through the inside of the saw chamber 47, and is threshed by contact with the saw drum 49. The grain culm conveyed to the end of the feed chain 46 is transferred to the culm chain 57, and the culm chain 5
At 7, the waste is discarded outside the combine 10.

The grains that have been threshed from the grain culm fall on the receiving net 50, and further pass through the receiving net 50 and are collected on the rocking / sorting section 51. Then, due to the swinging action of the swing selecting section 51 and the sorting wind generated from the Karako 52 and the suction fan 53,
Separated from the culm. The grain selected by the swing selection unit 51 is dropped and stored in the first gutter 55 or the second gutter 56 arranged below.

Combine 10 during the above-mentioned mowing work
The relationship between the traveling speed and the transportation speed of the grain culm in the pretreatment unit 16 and the threshing unit 45 is set as shown in FIG. 4, for example.

That is, when the combine 10 moves forward, the pretreatment section 16 and the threshing section 45 rise to V1 at a conveying speed substantially proportional to the combine 10 traveling speed until the traveling speed in the forward direction F reaches F1. When the traveling speed of the combine 10 exceeds F1, the conveying speed of the pretreatment unit 16 and the threshing unit 45 is maintained at V1. When the combine 10 moves backward, the conveying speed of the pretreatment unit 16 and the threshing unit 45 is set to V2 regardless of the traveling speed in the reverse direction R. However, the driving time is set to a predetermined time T required to convey the grain culm in the pretreatment unit 16 to the end of the feed chain 46 of the threshing unit 45.

The control of the combine 10 will be described with reference to the flowchart shown in FIG. The back conveyance timer (not shown) is a microcomputer 87.
It consists of a down counter inside.

In the present embodiment, when the pre-processing section 16 and the threshing section 45 are driven in advance by the back conveyance timer in the mode proportional to the rotation speed of the engine 13, the grain culm is moved to the position of the main sensor 41. From feed chain 4
The predetermined time T1 required to move to the end of 6 is set. Further, the back conveyance timer starts counting down at the same time when the control is started.

During operation, the back switch 96 is turned on and off.
The FF is determined (step S1 in FIG. 4, hereinafter simply referred to as step S ○). Here, the back switch 96
Is OFF (when the combine 10 is moving forward and mowing), the pretreatment unit 16 and the threshing unit 45 are
The transmission (T / M) 59 is driven in a mode proportional to the rotation speed (step S2). Also, the set value of the back conveyance timer is reset.

At step S1, the back switch 96 is turned off.
When it is N, it is determined whether the main sensor 41 is ON or OFF (step S3). Here, when the main sensor 41 is ON (when the saw depth transport device 36 has a culm),
The pretreatment unit 16 and the threshing unit 45 are connected to the engine (E /
G) It drives in the mode proportional to the rotation speed of 13 (step S4). Also, the set value of the back conveyance timer is reset.

At step S3, the main sensor 41 turns off.
When it is F, it is determined whether the main sensor 41 is ON or OFF in the previous determination in step S3 (step S5). The judgment in the previous step S3 is ON
If so, the back conveyance timer is reset (step S6).

When the main sensor 41 is ON in the previous determination and the main sensor 41 is OFF in this determination, that is, it is considered that the last cut grain culm has passed the position of the main sensor 41, Final reset of the back conveyance timer. Then, the process proceeds to step S4.

In step S5, if the main sensor 41 is OFF in the previous determination in step S3, it is determined whether the time T1 set in the back conveyance timer has elapsed (step S7). When the predetermined time T1 set by the back conveyance timer has not elapsed, the process returns to step S4.

That is, the main sensor 41 is turned off in this determination.
If it is FF and the main sensor 41 is OFF in the previous determination, it can be confirmed that the last cut grain culm has passed the position of the main sensor 41 and there is no subsequent grain culm. Therefore, the predetermined time T1 set in advance
Wait for the passage.

In step S7, when the predetermined time T1 set by the back conveyance timer has elapsed, the preprocessing unit 1
6 and the drive of the threshing unit 45 are stopped (step S8).

As described above, the main sensor 41 is turned on,
By setting the predetermined time T1 for continuing the drive of the preprocessing unit 16 and the threshing unit 45 by turning OFF, the predetermined time T
1 can be set with high accuracy.

The back switch 96 is arranged on the operation panel side by side with other switches, and as shown in FIG. 6, guides the route of the main gear shift operation lever 105 for switching the combine 10 between forward and reverse. It may be provided on the reverse side of the neutral region 107 of the crank-shaped guide groove 106. With such a configuration, even when traveling of the combine 10 is stopped, the main shift operation lever 10
The pretreatment unit 16 and the threshing unit 45 can be driven only by tilting 6 toward the reverse side of the neutral region 107.

In the above embodiment, the pre-processing section 16 and the threshing are provided for a predetermined time T1 after the output of the main sensor 41 attached to the saw depth conveying device 36 for detecting the presence or absence of grain culms changes from ON to OFF. Although the case where the drive of the portion 45 is continued has been described, the predetermined time T2 (from the time when the back switch 96 is turned on or the main shift operation lever 106 of the combine 10 is set to the neutral state and the traveling of the combine 10 is stopped). The preprocessing unit 16 and the threshing unit 45 may be continuously driven for a period longer than the predetermined time T1).

The main sensor 41 may be installed not only on the saw depth conveying device 36 but also on the scraping device 31, for example.

[0064]

As described above, according to the first aspect of the present invention, the grain culm conveys the cut grain culm to the end of the feed chain of the threshing unit via the conveying means of the pretreatment unit. When the combine traveling direction is switched from forward to reverse by the device, the pretreatment unit and the threshing unit are driven for a predetermined time required to convey the grain culms harvested by the pretreatment unit to the end of the feed chain. Therefore, the grain culm in the pretreatment unit can be conveyed to the end of the feed chain while the combine is being turned, and the grain culm can be cut at the next mowing. Even if the height changes, the previously cut grain culm and the newly trimmed grain culm will not be conveyed continuously, so the conveyance touch part etc. caused by the deviation of the adjacent grain culm The culm spills have been eliminated and the culm posture has been disturbed. It is possible to eliminate that or exhaust culm is clogged with straw processing unit of the cutter such as Te.

According to the second aspect of the present invention, the driving of the carrying means is continued only when the output of the main sensor attached to the carrying means of the pretreatment section is ON, and the output of the main sensor is turned ON. After the power is turned off, the driving of the conveying means is further continued for a certain period of time, so that waste of energy is eliminated and unnecessary noise is not generated, so that the driver does not feel uncomfortable. Further, it is possible to accurately predict the time required to send the grain culms in the conveying means to the threshing section, and to set the drive time of the conveying means appropriately.

According to the third aspect of the present invention, by providing the pretreatment driving continuously variable transmission between the combine engine and the conveying means of the pretreatment section driven by the engine. , Complicated operations such as auxiliary shift operation are unnecessary, and the operation becomes easy.

[Brief description of drawings]

FIG. 1 is a sectional side view of a combine for implementing the present invention.

FIG. 2 is a drive system diagram of the combine shown in FIG.

FIG. 3 is a control system diagram of the combine in FIG.

FIG. 4 is a characteristic diagram showing the relationship between the traveling speed of the combine and the conveying speed of the pretreatment unit and the threshing unit.

FIG. 5 is a flowchart showing a control process.

FIG. 6 is a plan view showing the arrangement of back switches.

[Explanation of symbols]

10 ... Combine 16 ... Pretreatment unit 13 ... Engine 36 ... Conveying means (saw depth conveying device) 41 ... Main sensor 45 ... Threshing department 46 ... Feed chain 71 ... Continuously variable transmission for pretreatment drive 85 ... Control device T1 ... predetermined time T2 ... predetermined time

Continued front page    (72) Inventor Tatsuya Yamazaki             Shimane Prefecture Yatsuka-gun Higashi Izumo-cho Ojiyacho 667             1 Within Mitsubishi Agricultural Machinery Co., Ltd. (72) Inventor Masahiro Nishikori             Shimane Prefecture Yatsuka-gun Higashi Izumo-cho Ojiyacho 667             1 Within Mitsubishi Agricultural Machinery Co., Ltd. (72) Inventor Toshiyuki Ishibashi             Shimane Prefecture Yatsuka-gun Higashi Izumo-cho Ojiyacho 667             1 Within Mitsubishi Agricultural Machinery Co., Ltd. (72) Inventor Takashi Kadowaki             Shimane Prefecture Yatsuka-gun Higashi Izumo-cho Ojiyacho 667             1 Within Mitsubishi Agricultural Machinery Co., Ltd. F term (reference) 2B074 AA02 AB01 AC02 AD05 AF02                       AG03 BA19 DA02 DB01 DB03                       DB04 DD01 DE03 EA06 EB19                       EC01 EE07 FA04 FB01                 2B076 AA03 DA05 DA09 DA15 EA03                       EC11 EC17 ED09                 2B084 AA01 BH01 BH20

Claims (3)

[Claims] 1. A combine grain culm transporting device for transporting a cut grain culm from a pretreatment section to a threshing section, when the combine traveling direction is switched from forward to reverse, or when traveling is stopped. A control device for continuing the drive of the pretreatment unit and the threshing unit for a predetermined time required to convey the grain culms cut by the pretreatment unit to the end of the feed chain of the threshing unit, And combine grain culm carrier. 2. The control device includes a main sensor attached to the conveying means of the pretreatment unit, for detecting the presence or absence of grain culm,
Only when the traveling direction is switched from forward to reverse or when traveling is stopped, and only when the output of the main sensor is ON,
The driving of the pretreatment unit and the threshing unit is continued, and after the output of the main sensor is turned from ON to OFF, the driving of the pretreatment unit and the threshing unit is further continued for the predetermined time. The combine grain culm conveying device according to claim 1. 3. A grain culm of a combine harvester, characterized in that a continuously variable transmission for pretreatment drive is provided between the engine of the combine harvester and the pretreatment unit and the threshing unit driven by the engine. Transport device.