JPH0767454A - Combine harvester - Google Patents

Abstract

PURPOSE:To provide a combine harvester suppressed in dust blow from a threshing chamber and noise generation, capable of preventing development of unthreshing, equipped with a whole culm feeder, a threshing revolution sensor, etc., midway of grain culm conveying route. CONSTITUTION:A whole culm feeder 16 is installed midway of grain culm conveying route for threshing operation so as to be switchable between (A) holding conveyance mode with which reaped grain culms are conveyed and (B) whole culm feed mode with which the whole reaped culm is fed in a thresher by releasing the hold of reaped grain culm feet; besides, a threshing revolution sensor 32 to detect the number of revolutions of the driving shaft 31 of the thresher and a short culm sensor S2 to detect that the length of grain culms being conveyed towared the thresher is at or below a specified value, are also installed. And a control means 12 is formed so as to be designed that, based on information from this sensor S2, the whole culm feeder 16 is switched from the mode A to the mode B, and after that, when the value from the sensor 32 is recovered to a set value, the whole culm feeder 16 is returned from the mode B to the mode A.

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 combine is configured as follows.

[0002]

2. Description of the Related Art In the above combine, in the prior art, as disclosed in, for example, Japanese Utility Model Publication No. 123837/1990,
When an extremely short grain culm that cannot be detected by the grain culm presence sensor located on the stocker side of the grain culm presence sensor is conveyed, this grain culm presence sensor is in the off state (the absence of grain culm ] Is detected, it is configured to release the stock source sandwiching state of the transport grain culm in the transport route second half of the sandwiching transport device for threshing work, and to introduce all the culms of the transport grain culm into the handling chamber, and the grain culm In some cases, when the presence / absence sensor detects a grain culm, the all culm throwing state is released.

[0003]

In the above conventional structure, when the cutting height for the planted grain culm is extremely high, when such an extremely short corn grain is conveyed, the handling room With this, it is not possible to perform threshing treatment just by making a slight contact of the tip side with the handling barrel.In such a case, the stock pinching is released and the whole culm is put into the handling chamber to perform threshing treatment. This is to reduce the amount of leftovers. However, in the above configuration, the pinching of the pinching and conveying device is canceled based on the detection result of the grain culm presence sensor provided on the starting end side in the grain culm conveying route in the cutting pretreatment unit, and the grain culm presence sensor detects the grain. When the culm is detected, that is, when a long culm is conveyed, the configuration is such that the normal holding and conveying state is restored. Therefore, the following problems occur. That is, in order to eliminate hand cutting work in the corners that cannot be handled by turning work at the edge of the ridge, etc., gradually raise the cutting pretreatment unit to avoid contact with ridges When performing a so-called mowing operation, the shortest grain culm is conveyed at the end of the mowing operation, so the nipping / conveying device is maintained in the nipping release state until the next work is started after the mowing is completed. Therefore, dust from the threshing device blows out from this gap, and the handling cylinder that rotates at high speed faces the outside from the gap, so there is a problem in terms of safety, and there was room for improvement in this respect. . The present invention aims to solve the above-mentioned problems.

[0004]

[Means for Solving the Problems] The characteristic configuration of the present invention is, in the combine described at the beginning, a sandwiching and conveying state for conveying a harvested grain culm in the middle of a grain culm transporting route for threshing treatment, and a harvested grain culm. Threshing to detect the rotation speed of the drive shaft in the threshing device, while providing the all-culm feeding device that can switch to the all-culm feeding state in which all the culms of the harvested grain culms are released into the threshing device Rotational speed detection means and a short culm detection means for detecting that the culm length of the grain culm conveyed to the threshing device is less than or equal to a set value, based on the detection information of the short culm detection means, When the whole culm throwing device is switched from the pinching and conveying state to the whole culm throwing state, and then the detection value of the threshing rotation number detecting means is restored to the set number of rotations, the whole culm throwing device is changed from the whole culm throwing state to the pinching and conveying state. Control means to restore Lies in the fact that is equipped.

[0005]

When the short culm detecting means detects that the culm length of the transported grain culm is equal to or less than the set value during the cutting operation,
Since the whole culm throwing device is switched from the pinching and conveying state to the whole culm throwing state, it is possible to throw all such culms including the stalks into the threshing device for reliable handling. In this way, even if the culm is short, all the stem parts (straws) are also put into the threshing device, so that the work load on the threshing device increases, and as a result, the threshing device in which the work load directly acts. The rotational speed of the drive shaft in 1) is temporarily reduced, and when the threshing process is completed, the original rotational speed is restored. Therefore, when such a change in the rotational speed of the drive shaft is detected and the detected value recovers to the set rotational speed,
When the threshing process of the short culm is completed, the all culm feeding device is automatically controlled to return from the all culm feeding state to the sandwiching and conveying state.

[0006]

[Effects of the Invention] Therefore, while it is possible to prevent the harmful effect that the extremely short culm is discharged in a state of being left unhandled,
Even if it is not a continuous high mowing work but a work form in which the shortest culm is conveyed at the end of mowing work, such as mowing work, the nip-conveying device normally holds the nip-conveying device at a reasonable timing at the end of such work. It was possible to return to the transport state, dust could be blown out and noise could be reduced, and work safety could be improved.
A configuration in which a change in the work load of the threshing device is detected based on the engine speed is also conceivable.
The power from the engine is supplied not only to the threshing device but also to the airframe traveling drive system, and the traveling load may increase depending on the traveling condition because the combine travels in the wetland. Since the engine rotation speed changes, there is a drawback that the threshing work load cannot be accurately detected, and an error occurs due to slip of the transmission belt or the like, but in the present invention, the rotation speed of the drive shaft in the threshing device is directly changed. Because of the detection configuration, it is unlikely to be affected by the load of the traveling drive system or the belt slip.

[0007]

Embodiments will be described below with reference to the drawings. Figure 6
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 power of the engine mounted on the machine body is supplied to the threshing device 2 via a belt tension type threshing clutch (not shown), and is also supplied to each crawler traveling device 1 and the cutting pretreatment unit 4 via a transmission belt and a transmission device. The transmission system is configured as follows. 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. A transporting device 7, a vertical transporting device 9 for handing over the grain culm to the sandwiching transporting device 8 of the threshing device 2 while gradually laying the culm down, and the like are configured to swing up and down by driving a lifting cylinder 10. In the threshing device 2, the nipping and transporting device 8 composed of a feed chain 8a that is rotationally driven and a sandwiching rail 8b that is arranged oppositely to the threshing device 2 sandwiches and transports the root side of the grain culm, and the threshing device on the tip side. Two
It is configured to handle and process in-house.

The vertical transfer device 9 comprises a stock transfer device 9a for sandwiching and transferring the stock side of the grain culm, a head transfer device 9b for locking and transporting the head side of the culm, and a tip guide plate 9c. It is swingably supported about the same axis as the swing axis P of the processing unit 4, and is swingably adjustable by an electric motor M1 with a gear type speed reduction mechanism (hereinafter referred to as a handling depth motor). The receiving and pinching portion from the auxiliary transporting 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, as shown in FIG. 1 and FIG. 6, a pair of grain culm presence / absence sensors S1 and S2 for culm length detection are provided in the conveyance route of the harvested grain culm, and the tip of the grain culm is provided between these sensors S1 and S2. In order to be located, the handling depth motor M1 is automatically controlled by the control device 12 provided with a microcomputer as a control means. Both of the sensors S1 and S2 are provided in a switch type that is turned on by swinging when a grain culm contacts, and a grain culm presence / absence sensor S1 located on the tip side (hereinafter referred to as a long culm sensor).
Is off, the grain culm presence sensor S2 located on the stocker side
The handling depth motor M1 is controlled so that the [short culm detecting means, which will be referred to as a short culm sensor hereinafter] is turned on. At the swinging fulcrum portion of the vertical conveyance device 9, a potentiometer-type supply position sensor 13 for detecting the current adjustment position of the vertical conveyance device 9 is provided.
A stock origin sensor 14 for detecting whether or not grain culms are being carried is provided in the carrying route.

The combine is provided with a structure capable of automatically performing the mowing work at the edge of the ridge and preventing the cut grain culm of the extremely short culm produced in the mowing work from being left untreated. That is, the control unit 3 is provided with the instruction switch 15 for giving an instruction to start the cutting operation, and when the instruction switch 15 is operated, the pre-mowing processing unit 4 is automatically raised, and
The handling depth motor M1 is configured to operate to the deepest handling side. In addition, in the middle of the grain culm transportation route for threshing processing, a state in which the harvested grain culm is transported, and a state in which the planter side sandwiching of the harvested grain culm is released and all the culms of the harvested grain culm are put into the threshing device 2 All culm throwing device 16 that can be switched to
When the long culm sensor S1 and the short culm sensor S2 both detect the absence of grain culm in a state in which 1 is adjusted to the deepest handling side, the whole culm feeding device 16 is moved from the position where the sensor is arranged.
After the required time for carrying the harvested culms has reached the control device 12, the control device 12 controls the whole culm throwing device 16 to switch from the sandwiching and conveying state to the whole culm throwing state. As shown in FIGS. 2 and 4, the sandwiching rail 8b pivotally connects a plurality of divided bodies by pivot pins 23, and the rods 24 connected to the pivot pins 23 are vertically slidable on the frame body 25. The coil springs 18 supported on the rod 24 and externally fitted to the rod 24 connect the respective pivot points to the feed chain 8
It is configured so as to be pressed and biased to the a side. Nip transport device 8
In the middle of the conveyance path by the rod, at a part of the pivot points of the holding rail 8b, which is urged by the spring 18 toward the feed chain 8a by the operating member 17 that is interlocked and rotated by the lift driving electric cylinder M2, The whole culm throwing device 16 is configured so that 24 can be lifted upward to partially cancel the grain culm sandwiching action with the feed chain 8a. 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 drum 30 which is rotationally driven inside the threshing device 2 (see FIG. 3).

A transport rotation sensor 19 for detecting the rotation state of the stock carrier 9a is provided on the drive shaft of the vertical carrier 9.
Based on the value detected by the transport rotation sensor 19, the stock carrier device 9a
The feed chain 8 is configured so as to obtain the conveyance status from the location where the sensors S1 and S2 are arranged to the conveyance end portion.
Since the rotation speed of a is a substantially constant speed that is predetermined in the case of a normal load, the transport time from the transport start end portion of the feed chain 8a to the nipping release portion is a constant value, and can be calculated by a timer. Further, as shown in FIG. 1, a handling cylinder rotation sensor 32 (an example of threshing rotation number detecting means) for detecting the rotation speed of the drive shaft 31 of the handling barrel 30 is provided, and changes due to the work load of the threshing device 2. It is configured to detect the number of rotations of the handling cylinder.

The control procedure of the controller will be described below. As shown in FIG. 5, first, the detection value of the handling cylinder rotation sensor 32 during traveling of the machine body before the start of threshing work is read and stored as the no-load rotation speed N0 [step 1]. Next, in the mowing work, it is detected that the stock sensor 14 is in the ON state and the grain culm is in the transporting state, and when the instruction switch 15 is operated, the pre-mowing processing unit 4 is raised and the depth of handling is increased. The motor M1 is operated to the deepest handling side to maintain that state [steps 2-5]. When the instruction switch 15 is not operated, normal handling depth control is executed [step 6]. Then, the conveyance rotation sensor 19
The conveyance state is detected from the detection information of No. 1, and the vertical conveyance device 9 is confirmed to be at the deepest handling side supply position from the detection information of the supply position sensor 13, and the long culm sensor S1 and the short culm sensor S2 are turned off. When it is detected that the extremely short culm has been conveyed in the state, it is judged from the detection information of the conveyance rotation sensor 19 that the grain culm has been conveyed from the positions where the sensors S1 and S2 are arranged to the starting end of the feed chain 8a. From that point, the whole culm feeding device 1 from the starting end of the feed chain 8a
When the required transfer time up to 6 has elapsed, the electric cylinder M2
Is activated to switch to the state of putting all culms [Step 7-
12]. Then, after that, when it is detected that the handling cylinder rotation speed N has returned to the no-load rotation speed N0 based on the detection value of the handling cylinder rotation sensor 32, the output to the electric cylinder M2 is stopped and the all-cullet insertion state is set. Release and nip transport device 8
Is returned to the normal clamping work state [Step 13,
14].

In place of the handling cylinder rotation sensor, the rotation speed of another drive shaft for the threshing device such as the drive shaft of the first object recovery screw or the drive shaft of the second object recovery screw in the swing sorting device is detected. It may be configured to. Further, as the short culm detecting means, a dedicated extremely short culm detecting sensor may be used instead of the one that also serves as the grain culm presence / absence sensor for adjusting the handling depth as described above.

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 configurations of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is a control block diagram.

[Fig.2] Side view of all culm throwing device

[Fig.3] Side view of all culm throwing device

FIG. 4 is a vertical sectional front view of the all culm throwing device.

[Fig. 5] Control flowchart

FIG. 6 is a side view of the front part of the combine.

[Explanation of symbols]

 2 Threshing device 8 Clamping / conveying device 12 Control means 16 All culm feeding device 31 Drive shaft 32 Threshing speed detection means S2 Short culm detection 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). The combine harvester is configured to handle, and in the middle of the grain culm transport route for threshing treatment, the sandwiched transport state for transporting the harvested grain culm and the harvested grain by releasing the sandwiched side of the harvested grain culm A whole culm feeding device (16) that can be switched to a whole culm feeding state in which all culms of the culm are thrown into the threshing device (2) is provided, and the rotation speed of the drive shaft (31) in the threshing device (2) is detected. And a 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. Based on the detection information of the culm detecting means (S2), the all culm throwing device (16) Is switched from the sandwiching / conveying state to the all-culm insertion state, and thereafter, the threshing rotation number detecting means (32)
A combiner provided with a control means (12) for returning the all culm throwing device (16) from the all culm throwing state to the sandwiching and conveying state when the detected value of is recovered to the set number of rotations.