JPH0767446A - Grain culm transporting structure for combine harvester - Google Patents

Abstract

PURPOSE:To reduce load of threshing operation as much as possible while preventing occurrence of unthreshed grain culm by throwing grain culm only in a reaping operation state. CONSTITUTION:In a grain culm transporting structure for combine harvester, in which reaped grain culm is sent to a thresher 2, the foot side of grain culm is held by a holding conveyor 8 and the ear tip side is threshed in the thresher 2 while being transported, a whole culm throwing device convertible to a transporting state of reaped grain culm and to a state wherein holding of the foot side of reaped grain culm is released and the whole grain culm of the reaped grain culm is thrown into the thresher 2 is installed in the midst of a grain culm transporting passageway for threshing. When a reaping operation state in which reaping operation is carried out while gradually raising reaping height of grain culm is detected and a short culm detecting sensor S2 for discovering the culm length of transported grain culm is <=a set value is worked for detection, a whole grain culm throwing device is controlled and converted from a transporting state of grain culm to a throwing state of the whole grain culm.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention conveys a grain culm after cutting toward a threshing device, and nips and processes the tip side inside the threshing device while nipping and transporting the stock side with a nipping and conveying device. The present invention relates to a combine grain culm transport structure configured as described above.

[0002]

2. Description of the Related Art In the above combine, in the prior art, as disclosed in, for example, Japanese Utility Model Laid-Open No. 4-124035,
When the detector that detects the cutting height based on the height of the pre-cutting section against the machine detects a high cutting state at the edge of the ridge, the cutting depth adjustment is operated to the deep cutting side, and the nip transfer device for threshing work is performed. There was one configured to release the pinched state of.

[0003]

SUMMARY OF THE INVENTION In the above-mentioned conventional structure, the mowing pretreatment unit is provided in order to prevent the mowing pretreatment unit from colliding with the ridge, for example, when approaching a ridge while performing a mowing operation. When the mowing work is performed while raising the cutting height, the cutting height for the planted grain culm becomes extremely high.However, when such an extremely short mowing grain culm is transported, the tip end side is slightly left in the handling barrel in the handling room. Since it is not possible to perform threshing treatment just by contacting with, it is necessary to release the pinching of the stock and put all the culm in the handling room to perform threshing treatment to reduce the untreated residue. It was done. However, in the above-described conventional structure, the cutting height is detected based on the height of the cutting pretreatment unit based on the height of the machine body, and the level is judged to carry out all the culm insertion work. When the amount of subsidence of the aircraft is large in the wetland, the relative height of the aircraft is high, and when mowing was performed at a slightly higher level during normal mowing work, the condition of accidentally inserting all culms However, there is a possibility that the work load of the threshing device becomes excessive, and there is room for improvement in this respect. It is an object of the present invention to pay attention to the fact that there is a high possibility that an unhandled portion will occur in a reaping work, and it is possible to reliably prevent an untreated portion from remaining only in the mowing work state. In this way, the threshing work load is prevented from increasing unnecessarily.

[0004]

[Means for Solving the Problems] The features of the present invention are, in the combine harvester described at the beginning, a state in which a harvested grain culm is transported in the middle of a grain culm transporting route for threshing treatment, and a stock source of the harvested grain culm. A cutting operation is performed in which the cutting operation is performed by releasing the side clamp and switching all the culms of the harvested culm to the threshing device and gradually increasing the cutting height of the grain culm. The cutting work state detecting means, and the short culm detecting means for detecting that the culm length of the grain culm conveyed toward the threshing device is less than or equal to a set value, the cutting work state detecting means Is detected and the short culm detection means is detected, a control means for switching the whole culm feeding device from the grain culm conveying state to the whole culm feeding state is provided.

[0005]

[Operation] When performing a mowing operation in which the mowing height of the grain culm is gradually increased near the ridge during the mowing operation, for example, continuous raising operation of the pre-mowing processing unit or operation of a dedicated switching operation tool is performed. If it is detected that the culm length of the transported grain culm is less than or equal to the set value after it is detected that it is in the cutting work state based on Since it is controlled to switch,
As for the extremely short culms, which are generated by cutting work, all culms including the stems are put into the threshing device, and it is possible to avoid the untreated residue by being effectively treated.

[0006]

Therefore, in the cutting work near the ridge, it is possible to effectively suppress the occurrence of the unhandled short culm, but in the normal cutting work, the cutting height above the set value is sporadically generated. Based on the detection of the short culm, etc., it is possible to prevent the harmful effects such that the total culm is put in each time and the threshing work load increases unnecessarily.

[0007]

Embodiments will be described below with reference to the drawings. Figure 4
As shown in FIG. 2, the cutting pretreatment unit 4 is provided on the front of the machine body including the pair of left and right crawler traveling devices 1, the threshing device 2, the control unit 3, and the like.
Is connected to be movable up and down around the horizontal axis P to form a combine. The pre-cutting processing unit 4 is a raising device 5 that causes planted grain culms, a cutting blade 6 that cuts the roots of the planted grain culms that have been raised, and an auxiliary that collects the harvested grain culms and conveys them backward. It is provided with a carrier device 7, a vertical carrier device 9 and the like which hands over the grain culm to the sandwiching carrier device 8 of the threshing device 2 while gradually lying down,
The lift cylinder CY1 is driven to swing up and down. In a normal mowing operation, the mowing pretreatment unit 4 is controlled to move up and down so as to maintain the set height with respect to the ground, and can also be moved up and down by manual operation of the lifting lever 11 provided on the control unit 3. That is, the ultrasonic sensor 26 for detecting the height above the ground is provided in the lower part on the front side of the pre-mowing processing unit 4, as shown in FIG.
As shown in, the lift cylinder CY1 is controlled by the control device 12 having a microcomputer as a control means so that the detection value of the ultrasonic sensor 26 becomes a set value.
Drive control. Then, the control device 12 is activated by operating the switches SW1 and SW2 that detect the respective operating positions by the raising and lowering operations of the elevating lever 11.
Is forcibly ascending / descending the reaping pretreatment unit 4 in preference to the ascending / descending control.

Further, a potentiometer type elevation angle sensor 27 for detecting a relative elevation angle with respect to the machine body is provided at the elevation swing fulcrum of the pre-mowing processing section 4.

As shown in FIG. 8, the left and right crawler traveling devices 1 and 1 are configured to be individually lifted and lowered relative to the machine body frame 10 by hydraulic lift cylinders CY2 and CY2. That is, the track frame 1a on the crawler traveling device side is pivotally connected to the machine body frame 10 through the front and rear swing arms 21 and 21, and the swing frames 21 and 21 are integrally rotatably connected to each other. Arm 2
2, 22 are driven and rocked by a hydraulic rolling cylinder CY2 so that the crawler grounding portion 1b is vertically driven. In addition, each rolling cylinder CY
2, CY2 is configured to execute automatic rolling control by controlling the control device 12 so that the vehicle body is always maintained in a horizontal posture based on the horizontal inclination information of the vehicle body by a horizontal inclination sensor 20 provided in the vehicle body. is there. Further, a crawler lift sensor 28 for detecting the expansion / contraction operation amount of the rolling cylinders CY2, CY2 as data on the height of the left and right crawler traveling devices 1, 1 with respect to the body is provided.

In the threshing device 2, the nipping and conveying device 8 composed of a feed chain 8a which is rotationally driven and a nipping rail 8b which is arranged opposite to the feed chain 8a nips and conveys the root side of the grain culm, and the tip side. Are processed in the threshing device 2. The vertical transfer device 9 includes a stock transfer device 9a for nipping and transferring the stock side of the grain culm, an ear end transfer device 9b for locking and transferring the ear end side of the culm, and a head guide plate 9c. It is supported so as to be swingable about the same axis as the swing axis P of, and the swing is adjustable by an electric motor M1 with a gear type reduction mechanism [hereinafter, referred to as a handling depth motor], so that auxiliary conveyance is possible. The receiving and pinching point from the device 7 is changed in the culm length direction, and the handling depth in the threshing device 2 can be changed and adjusted. The handling depth motor M1 is automatically controlled so that the handling depth is always in an appropriate state regardless of the culm length of the planted grain culm. That is, a pair of grain culm presence / absence sensors S1 and S2 for culm length detection are provided in the transportation route of the harvested grain culm, and the control device 12 handles so that the tip of the grain culm is located between these sensors S1 and S2. The depth motor M1 is automatically controlled. Both of the sensors S1 and S2 are provided in a switch type that is turned on by rocking when a grain culm comes into contact, and the grain culm presence / absence sensor S1 (hereinafter referred to as a long culm sensor) located on the tip side is in an off state. The handling depth motor M1 is controlled so that the grain culm presence / absence sensor S2 (which is an example of a short culm detecting means, which will be referred to as a short culm sensor hereinafter) located on the side is turned on.
At the swinging fulcrum of the vertical transport device 9, there is provided a potentiometer-type supply position sensor 13 that detects which position the vertical transport device 9 is currently adjusted to. Stock sensor 14 to detect whether or not
Is equipped with.

[0012] This combine is provided with a structure that prevents the cut grain culm of the extremely short culm from being left unhandled during the mowing work in which the cutting height of the grain culm is gradually increased at the edge of the ridge. . In other words, in the middle of the grain culm transportation route for threshing processing, the state of transporting the cut grain culm,
An all culm throwing device 16 is provided, which is switchable to a state in which the root side of the harvested culm is released and all the culms of the harvested culm are thrown into the threshing device, and the handling depth motor M1 is adjusted to the deepest handling side. The long culm sensor S1 and the short culm sensor S2 while
Both detect the absence of grain culm, and if the culm length of the grain culm conveyed is detected to be less than or equal to a set value, the cut grain culm from the sensor location to the whole culm throwing device 16 is detected. After the elapse of the required transportation time, the control device 12 controls the all culm insertion device 16 to switch from the sandwiched conveyance state to the all culm insertion state. Incidentally, the control device 12 is configured to detect the fact that the cutting operation is being performed by the fact that the forced raising operation of the pre-cutting processing unit 4 continues for a set time or longer during the cutting operation. Therefore, the cutting work state detecting means A is provided in the control device in the form of a control program.

As shown in FIG. 6, the holding rail 8b pivotally connects a plurality of divided bodies by pivot pins 23, and a rod 24 connected to each pivot pin 23 is vertically slidable on a frame body 25. And the rod 24
The coil springs 18 externally fitted to the above are configured to urge each pivot point to the feed chain 8a side. In the middle of the conveying path by the sandwiching / conveying device 8, one of the pivot points of the sandwiching rail 8b, which is biased by the spring 18 toward the feed chain 8a by the rotating member 17 that is interlocked with the lift driving electric cylinder M2. In a part, the whole culm feeding device 16 is configured so that a plurality of rods 24 are lifted upward so that the grain culm clamping action with the feed chain 8a can be partially released. That is, when the nipping by the nipping rail 8b is released, the grain culm is also pulled in together with the culm portion by the handling barrel that is rotationally driven inside the threshing device 2 (see FIG. 7).

Further, a transport rotation sensor 19 for detecting the rotation state of the stock carrier 9a is provided on the drive shaft portion of the vertical carrier 9, and the sensor S1 by the stock carrier 9a is detected from the detected value of the carrier rotation sensor 19. , S2 is configured to obtain the transport status from the disposition location to the transport end portion, and since the rotation speed of the feed chain 8a is a predetermined constant speed, the transport time from the transport start end portion of the feed chain 8a to the pinch release location Is a constant value, and can be calculated by a timer.

The control procedure of the controller 12 will be described below. As shown in FIG. 2 and FIG. 3, when the raising lever 11 performs the forced raising operation in the state where the stock origin sensor 14 is in the ON state and the grain culm is in the conveying state,
When the pre-cutting processing unit 4 is driven to rise [steps 1 to 3] and the raising operation time is continued for a set time or longer, it is determined that the cutting operation is being performed, and the handling depth motor M1 is set to the deepest handling side. To maintain the deep handling state (steps 4 and 5). If it is not in the cutting work state, normal handling depth control is executed [step 6]. Then, as shown in FIG. 4 and FIG. 5, when it is detected that the tip portion of the pre-cutting processing unit 4 rides on the ridge and the detection value [height against ridge] of the ultrasonic sensor 26 becomes equal to or less than the set value h1. The lower end of the pre-cutting unit 4 secures the minimum ground height H from the mechanical characteristics determined in advance by the ridge height detection value detected by the ultrasonic sensor 26 and the elevation value sensor 27 detection value. As described above, the elevation angle of the pre-mowing processing unit 4 corresponding to the relative lowering change of the crawler traveling device 1 is calculated [steps 7 and 8].
Then, the transmission 2 is installed in the machine body traveling system so that the vehicle body traveling speed is suitable for the descending speed of the crawler traveling device 1.
9 is decelerated by the electric motor 30, the rolling control is stopped, and the left and right crawler traveling devices 1, 1 are lowered to the lowest descent positions.
2 is operated, and the lift cylinder CY1 is automatically lifted and lowered so that the lift angle calculated in step 8 corresponds to the lowering displacement according to the detection information of the crawler lift sensor 28 and the lift angle sensor 27. [Steps 9 to 11]. After that, the conveyance state is detected from the detection information of the conveyance rotation sensor 19, and the supply position sensor 1
It is confirmed from the detection information of No. 3 that the vertical conveyance device 9 is at the deepest handling side supply position, and the long culm sensor S1 and the short culm sensor S2.
When it is detected that the short culms have been conveyed in the respective OFF states, the grain culms have been conveyed from the location where the sensors S1 and S2 are arranged to the starting end of the feed chain 8a based on the detection information of the conveyance rotation sensor 19. When the time required for transportation from the starting end of the feed chain 8a to the all culm feeding device 16 has elapsed from that point, the electric cylinder M2 is operated to switch to the all culm feeding state [steps 12 to 1].
7]. Then, when the conveyance of the extremely short culm is completed during the operation of putting all the culms, and either the long culm sensor S1 or the short culm sensor S2 is turned on, it is conveyed to the start end of the feed chain and is fed. After the elapse of the time required for carrying by the chain 8a, the lift operation of the electric cylinder M2 is stopped to return to the normal sandwiching carrying state [step 18-
21].

[Other Embodiments] As the short culm detecting means,
A dedicated extremely short culm sensor may be provided instead of the grain culm existence sensor for adjusting the handling depth. Further, as the cutting work state detecting means, it is operated to detect that the cutting work state has been reached based on the switching operation of the dedicated mode setting switch, or to stop the traveling when the ridge is reached. The operation of the traveling stop pedal to the traveling stopped state may be detected by detecting that the cutting operation state has been reached.

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

[Brief description of drawings]

FIG. 1 is a control block diagram.

[Fig. 2] Control flowchart

FIG. 3 is a control flowchart.

FIG. 4 is a side view of the front part of the combine.

FIG. 5 is a side view of the front part of the combine.

FIG. 6 is a side view of the all culm throwing device.

FIG. 7 is a side view of the all-culm throwing device.

FIG. 8 is a side view of the crawler traveling device.

[Explanation of symbols]

 2 Threshing device 8 Clamping / conveying device 12 Control means 16 All culm throwing device A Cutting operation state detecting means S2 Short culm detecting means

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Yoshiyoshi Fukuoka, 64, Ishizukitamachi, Sakai City, Osaka Prefecture Kubota Sakai Factory Co., Ltd. (72) Tokatsu Otani, 64, Ishizukitamachi, Sakai City, Osaka Kubota Sakai Manufacturing In-house (72) Koji Yamagata 64 Ishizukita-machi, Sakai City, Osaka Prefecture Kubota Sakai Factory Co., Ltd. (72) Inventor Seiya Ho, 64 Ishizu-kitamachi, Sakai City Osaka Prefecture Kubota Sakai Factory, Inc. (72) Inventor Shigeki Hayashi 64 Ishizukita-machi, Sakai City, Osaka Prefecture Kubota Sakai Factory Co., Ltd. (72) Inventor Sowa Terao 64, Ishizukita-machi, Sakai City Osaka Prefecture Kubota Sakai Factory Co., Ltd.

Claims (1)

[Claims] 1. The harvested grain culm is conveyed toward the threshing device (2), and the tip side is held inside the threshing device (2) while sandwiching and transporting the stock side with the sandwiching and conveying device (8). It is a combine grain culm transport structure configured to handle, and in the middle of the grain culm transport route for threshing treatment, the state of transporting the harvested grain culms and the clamping of the harvested grain stalks on the plant side are released. A cutting work to perform cutting work while gradually increasing the cutting height of the grain culms while providing a whole culm feeding device (16) that can be switched to a state in which all the culms of the harvested grain culms are put into the threshing device (2). Cutting work state detecting means (A) for detecting that the state is a state, and short culm detecting means (S2) for detecting that the culm length of the grain culm conveyed to the threshing device (2) is equal to or less than a set value. And the cutting operation state detection means (A) is When the short culm detecting means (S2) is activated and the detecting operation is performed, the combine grain culm transportation is provided with the control means (12) for switching the all culm feeding device (16) from the grain culm transporting state to the all culm feeding state. Construction.