JPH06303839A - Head feeding type combine harvester - Google Patents

Abstract

(57) [Abstract] [Purpose] To prevent the unremoved leftover from occurring when the culm length of the cut grain culm is short, and to prevent the engine load resulting from that from becoming excessive. [Structure] In a self-removing combine equipped with a pinching and conveying device 10 that nips and conveys the root side of a cut grain culm while allowing the tip side to pass through the handling chamber, the pinching and conveying device 10 can pinch and convey grain culms. Instead, it is equipped with threshing work state switching means A for switching to the whole culm throwing state in which the whole amount of grain culms is thrown into the handling room, and when the threshing work state switching means A switches to the all culm throwing state, the machine traveling speed is changed. It is configured to perform automatic deceleration control.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a self-removing combine having a pinching / conveying device for nipping the root side of a cut grain culm and conveying it while allowing the tip side to pass through the handling chamber.

[0002]

2. Description of the Related Art In a conventional self-removing combine, a planting grain culm is mowed by a mowing section at the front end of the machine body, and the mowed grain culm is conveyed by a vertical conveying device to a starting end of a sandwiching conveying device in the threshing device. Then, the plant side of the harvested culm is sandwiched and configured to be handled while being conveyed. With respect to the change in the culm length of the planted culm, the vertical length is determined based on the detection result of the culm length detection sensor. A configuration has been adopted in which the handling depth adjustment control is performed to change the sandwiched portion by the transport device in the culm length direction (see, for example, JP-A-4-365420).

[0003]

However, in the above-mentioned conventional configuration, when the culm length of the transported grain culm is extremely short, even if the vertical transport device is controlled to move to the deepest handling side, it is pinched by the feed chain. Since the distance from the grain to the grain-grained portion of the grain is short, the grain-grained grain portion may pass through a region that cannot be subjected to the handling action by the handling barrel rotating in the handling room. In particular, in the reaping work at the edge of the ridge, when performing the reaping work while raising the reaper in order to prevent the divider at the front end of the machine body from coming into contact with the ridge, the so-called reaping work causes As a result of shortening, the above-mentioned problems occur, and there is an adverse effect that unhandled parts occur. It is an object of the present invention to eliminate the above-mentioned inconveniences and to suppress the inconvenience resulting from the increased load on the threshing device.

[0004]

A characteristic configuration of the present invention is that, in the self-removing combine described at the beginning, the whole amount of grain stalks is put into the handling chamber instead of sandwiching and transporting the grain stalks by the sandwiching and conveying device. In addition to providing threshing work state switching means for switching to the all-culm input state, there is also provided deceleration control means for automatically reducing the machine traveling speed when the threshing work state switching means switches to the all-culm input state.

[0005]

[Operation] For example, when the culm length of the cut grain culm is within the set range, threshing processing is performed while sandwiching and transporting the grain culm by the sandwiching and conveying device, and the culm length of the harvested grain culm is too short and unhandled occurs. If there is a possibility that the grain handling part will not be handled by switching the transport grain culm not only to the graining part but also to the stem culm part into the handling chamber. It is possible to suppress the discharge of grain culms (discharging straws) to the outside of the machine body, and it is possible to reliably avoid the occurrence of unhandled grains. Moreover, since the machine traveling speed is automatically reduced when switching to the all culm input state, the machine body traveling load is reduced, and the threshing work load resulting from the all culm input state as described above. Is offset, and the overall increase in engine drive load can be suppressed.

[0006]

As a result, it is possible to surely avoid the adverse effect that the grain adhering grain portion passes through the area where the handling process cannot be performed in the handling room and the untreated portion is left, and the resulting threshing work is performed. It has become possible to provide a self-removing combine that can prevent the adverse effects such as the occurrence of engine stall and the reduction in work efficiency due to the increased load.

[0007]

Embodiments will be described below with reference to the drawings. Figure 1
Shows the front of the self-removing combine. In this combine, a threshing device 3 is mounted on a machine body frame 2 provided with a pair of left and right crawler traveling devices 1, 1, and a mowing pretreatment unit 4 is movably connected to a front part of the machine body so that the mowing pretreatment unit 4 The boarding operation unit 5 is provided on the right side of the. The transmission system is configured so that the power of the engine E is supplied to the left and right crawler traveling devices 1, 1 via the hydrostatic continuously variable transmission H and the transmission case M, and the power of the engine E is supplied to the threshing device 3. I am doing it.

As shown in FIG. 3, the speed change lever 30 and the speed change arm 31 of the continuously variable transmission H are interlockingly connected via a link mechanism 32, and an electric motor is connected through a friction holding mechanism 33 in the middle of the linkage. 34 so that the electric motor 34 can be directly operated and held in position even when the electric motor 34 is stopped, the electric motor 34
When is driven, a gear shift operation can be performed via the friction holding mechanism 33. This electric motor 34 automatically decelerates the vehicle speed when the engine speed detected by the speed sensor S decreases below a set value due to an increase in the machine running load and the threshing work load during the mowing work. Drive control is performed to prevent engine stalling.

The pre-cutting processing section 4 cuts the weeding tool 6 for allocating and weeding the grain stalks to be mowed, the raising device 7 for raising the fallen grain culms in a standing posture, and the root of the raised grain culms. Mowing device 8, a plurality of auxiliary transporting devices 9a, 9b, 9c for gathering the mowed grain culms of each line trimmed to the center side in the cutting width direction, gradually changing the posture of the gathered standing grain culms to a sideways posture It is equipped with a vertical conveyance device 11 and the like that conveys toward the start end of the sandwiching conveyance device 10 in the rear threshing device 3, and the whole pre-mowing treatment unit 4 is vertically movable around the horizontal axis P to the machine body frame 2. I support it. As shown in FIG. 2, the sandwiching and conveying device 10 for threshing work is composed of a feed chain 12 which is endlessly rotationally driven and a sandwiching rail 13 which is arranged so as to face the feed chain 12, and the sandwiching rail 13 is , A plurality of divided bodies 13a each having a U-shaped cross section are pivotally connected to each other, and a lower side is formed by a coil spring 16 externally fitted to a guide rod 15 which is supported by the fixed base 14 at each pivotally connected portion and is positionally regulated. It is configured such that each divided body 13a can be bent so as to be sandwiched between the divided grains 13a and conveyed while being pressed and biased.

Each of the auxiliary transfer devices 9a, 9b, 9c is
Each transport path length and driving speed are set so that the grain culms of each row cut at substantially the same cutting timing are joined together. That is, as shown in FIG. 4, the grain culms in the strips on the uncut side and the strips in the middle are the belts 17 with locking projections.
a, 17b and scraping rotators 18a, 18b are gathered together on the center side by auxiliary transporting devices 9a, 9b, and the strips on the trimmed side are belts 17c with locking projections, scraping rotators 18c. The auxiliary transporting device 9c configured by the sandwiching and transporting device 19 is configured to be merged and transported to the gathering position. Therefore, the auxiliary transfer devices 9a and 9b in the uncut side strip and the intermediate strip are set to have substantially the same transport path length and substantially the same drive speed, and the auxiliary transport device 9c for the strip on the cut side has a long transport path. Because the driving speed is 2
It is configured so that the grain culms of each row cut at almost the same cutting timing are merged together by setting them faster than the other people.

The vertical transfer device 11 is composed of a tip side locking transfer device 11a and a stocker side clamping transfer device 11b, and an electric motor 20 with a speed reduction mechanism allows a vertical swing operation relative to the horizontal axis. Each of the auxiliary transport devices 9 is configured.
By changing the sandwiching position of the grain culms that are jointly conveyed from a, 9b, and 9c in the culm length direction, the depth of entry into the handling chamber 3a of the threshing device 3 (handling depth) is always controlled appropriately. Configured. That is, a pair of upper and lower grain culm detection sensors 21 and 22 for detecting the culm length of the transported grain culm are provided in the grain culm transport path, the short culm side detection sensor 21 always detects the grain culm, and the long culm side detection sensor 22 is The control device 23 equipped with a microcomputer drives and controls the electric motor 20 so as to be in the non-detection state, and vertically moves the vertical transfer device 11 so that the tip of the grain stem is located between the sensors 21 and 22. Dynamic control.

The threshing device 3 is a conveying device 1 for sandwiching a cut grain culm.
When the root side is clamped by 0, the tip side is driven by the handling barrel 3b that is driven to rotate in the handling chamber 3a, and the threshing work is performed. And, the vertical transfer device 11 is provided with the threshing work state switching means A capable of switching between a state in which the sandwich transfer device 10 performs the sandwich transfer of the grain culms and a state in which all the transfer culms are put into the handling chamber. When the short culm side detection sensor 21 detects the absence of grain culm despite being operated on the handling side, the length of the transported culm is extremely short culm that cannot be handled by the handling depth adjustment. Is determined to be
The threshing work state switching means A is provided in the feed chain 12
It is configured to automatically switch from the state of sandwiching and transporting grain culms to the state of loading all culms and to reduce the vehicle speed automatically. More specifically, one of the plurality of guide rods 15 that supports the sandwiching rail 13 is provided via the link mechanism 24 so that it can be driven to move upward by the electric motor 25.
It is configured to be switchable between a nipping action position located on the lower side and a position retracted to the upper side to release the grain culm nipping state. Therefore, by switching the guide rod 15 to the pinch release position, the grain culm which is being transported to that position is released from the pinch transport by the feed chain 12 and the pinching rail 13, and the whole is pulled into the handling chamber. Become. That is, the threshing release electric motor 25 constitutes the threshing operation state switching means A. Then, the pinch release electric motor 25 and the vehicle speed control electric motor 34 are connected to the control device 2.
3, the control device 23 [an example of the deceleration control means] controls the short culm side detection sensor 21 even though the handling depth adjusting electric motor 20 is driven to the deepest handling side. Detects the absence of grain culm,
Even if the engine speed is above the set value, immediately
The electric motor 34 for controlling the vehicle speed is driven to the deceleration side, and the electric motor 25 for releasing the pinch is driven after a lapse of a predetermined transport time to control the switching of the guide rod 15 from the pinching action position to the pinch releasing position. There is. as a result,
When the length of the cut culm is extremely short, the short culm side detection sensor 2
1 detects the absence of grain culm, which can prevent the above-mentioned all culm throwing state and untreated residue from occurring, and as soon as the short culm side detection sensor 21 detects the absence of grain culm. Since the vehicle speed is reduced, even if the threshing load increases due to the all culm throwing state, the traveling load has already been reduced and the engine will not stall.

The pinch release portion is the feed chain 1
It may be set in the latter half of the sandwiching and conveying path by 2. By doing so, the handling process in the handling room 3a is mostly performed at the front end of the transport path, and the handling process load is small in the latter half, so the threshing work load becomes excessive with the introduction of all culms. Can be suppressed.

[Other Embodiments] As described above, the threshing operation state switching means A is automatically switched and controlled, and instead, the handling depth adjusting electric motor 20 is driven to the deepest handling side. However, if the short culm side detection sensor 21 detects the absence of grain culm, the control device activates an alarm buzzer to alert the airframe pilot to pay attention to the pilot. You may comprise so that the threshing work state switching means A may be switched by switching the manual switching switch connected to the apparatus.

Instead of detecting whether or not the insertion length of the cut grain culm into the handling room is less than or equal to a set value, the grain culling portion of the grain culm passes through a region where the handling process cannot be performed by the handling barrel. Alternatively, the threshing operation state switching means A may be switched based on the image processing control by using a sensor for detecting whether or not the image information is obtained, such as an image sensor capable of obtaining image information.

The threshing operation state switching means A may be constructed as follows. As shown in FIG. 5 and FIG. 6, at the transfer position for the feed chain 12 from the vertical transfer device 11, the grain culm being delivered is forcibly pulled out and the whole culm is scraped into the handling port 3c of the threshing device 3 and transported. Crank type scraping device 2
7, the electromagnetic clutch 28 is provided in the transmission system for the crank type scraping device 27, and the handling depth adjusting electric motor 20 is driven to the deepest handling side. When the detection sensor 21 detects the absence of grain culm, the control device 23 controls the electromagnetic clutch 28 to switch from the disengaged state to the engaged state after a lapse of a predetermined transportation time. The culm may be thrown in so that the unprocessed residue does not occur. In this case, the threshing operation state switching means A is constituted by the crank type scraping device 27 and the electromagnetic clutch 28. As shown in FIG. 7, a disc cutter 2 for cutting the transport grain culm is provided at a position close to the feed chain 12 on the inner side of the handling chamber.
9 is provided by a slide mechanism 30 so as to be movable up and down, and when the above-mentioned short culm is detected, the disc cutter 2
The slide mechanism 30 may be controlled so that the grain culm is cut from the position where 9 is retracted downward to a cutting position where almost all culms are thrown into the handling chamber. Disk cutter 2
9 and the slide mechanism 30 constitute the threshing operation state switching means A.

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 side view of a front portion of a self-removing combine.

FIG. 2 is a side view showing threshing work state switching means.

[Figure 3] Shift operation system diagram

FIG. 4 is a plan view of a pre-cutting processing unit.

FIG. 5 is a side view showing threshing work state switching means of another embodiment.

FIG. 6 is a front view showing a threshing work state switching means of another embodiment.

FIG. 7 is a front view showing threshing work state switching means of another embodiment.

[Explanation of symbols]

 3a Handling room 10 Nip transfer device 23 Deceleration control means A Threshing work state switching means

Claims (1)

[Claims] 1. A self-removing combine, comprising a sandwiching and conveying device (10) for sandwiching and conveying the plant side of a cut grain culm and passing the tip side through the inside of the handling chamber (3a). The threshing work state switching means (A) for switching to the whole culm insertion state in which the whole amount of the culm is put into the handling chamber (3a) in place of the sandwiching and conveying of the culm by the sandwiching and conveying device (10), and the threshing is performed. A self-removing combine having a deceleration control means (23) for automatically decelerating the vehicle traveling speed when the work state switching means (A) is switched to the all culm insertion state.