JPS6239967B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a combine harvester handling depth adjustment device that allows automatic control and manual adjustment at the same time.

Conventionally, in Japanese Unexamined Patent Publication No. 54-91425, a lock pin of an operating lever is locked between the teeth of a gear rotated in forward and reverse directions by a motor, and an automatic handling system that rotates the motor in forward and reverse directions based on a signal from a culm length sensor is proposed. A technique has been disclosed that enables simultaneous depth control and manual depth adjustment by engaging and disengaging a lock pin of an operating lever. However, this technique has the following difficulties and is still impractical.

When performing emergency manual adjustment during automatic control, the operation of removing the lock pin from between the teeth and engaging it between other teeth of the rotating gear cannot be performed quickly, resulting in a delay in operation.

Especially in the case of small combine harvesters, there are many types that use a manual handling depth adjustment method in which a control lever connected to the clamping conveyor is latched into a guide groove in a guide plate provided on the side of the operation control section. However, if an attempt is made to incorporate the automatic handling depth control device shown in the above-mentioned publication into this product, it will require not only hydraulic and electrical components such as a culm length sensor and a motor, but also the following major modifications.

() Due to space limitations due to large-diameter gears, etc., the position of operating systems such as levers may have to be moved in some cases.

() It is necessary to interpose a link mechanism between the operating lever and the clamping conveyor, and special measures are required for the linkage so as not to impede the conveyance of the grain culms.

() It takes a lot of time and effort to change the connection method between the operating lever and the clamping conveyor, or to attach a lock pin or the like to the operating lever, or to modify it.

Therefore, the device itself becomes larger and more complex, and modification requires a great deal of effort.

The present invention solves the above-mentioned problems, allows emergency manual adjustment to be quickly performed during automatic control, and provides compatibility when changing the design or modifying the type of conventional manual adjustment method. It is an object of the present invention to provide an automatic handling depth adjustment device that can be used both automatically and manually, and can be efficiently incorporated into a small and compact device.

Hereinafter, the present invention will be described in detail based on embodiments shown in the accompanying drawings.

1 and 2, a side view and a plan view of a combine harvester to which the handling depth adjustment device of the present invention is applied are shown. The reaping conveyance section A is disposed in front of the reaping conveyance section A, the driving operation section B is disposed on one side of the reaping conveyance section A, and the threshing section C is arranged in series behind the reaping conveyance section A. A straw discharge section D is provided at the rear of the threshing section C, and a paddy storage section E is provided at the rear of the operating section B adjacent to the threshing section C.

The reaping conveyance unit A includes a lifting case 4 provided diagonally behind each of the front grass dividing boards 3, a cutting blade 5 disposed below the lifting case 4, and each cutting blade 5. A star foil 6 and a scraping belt 7 located above, a lower conveyance chain 8 extending rearward and upward from above one of the star foils 6, and a position close to the rear end of the lower conveyance chain 8. It is composed of a vertical conveyance chain (pinching conveyor) 9 which is installed obliquely from above, and a tip conveyor 10 which is installed obliquely from above the lower conveyor chain 8 toward the supply port 11 side of the threshing section C. .

Further, the threshing section C has a feed chain 12 and a pinning rod 13 on one side opposite to the operation section B,
A handling cylinder 14 is disposed behind the supply port 11. The starting end 12a of the feed chain 12 is located above and close to the terminal end 9a of the vertical conveying chain 9, and the grain stems conveyed by the vertical conveying chain 9 are sent from the terminal end 9a to the starting end 12a of the feed chain 12. It has become a tradition that has been passed down from generation to generation.

In this embodiment, the terminal end 9a side of the vertical conveyance chain 9 is connected to a support bracket 1 erected on the machine body 2.
5 is rotatably supported on the upper end of the vertical conveyance chain 9 via an arm 16, and an operation for manual operation is provided on the starting end side of the vertical conveyance chain 9, as shown in FIGS. 3 and 4. A base of a lever 17 is provided, and the tip of the operating lever 17 is detachably engaged from one side with a substantially linear screw conveyor (spiral conveyor body) 18 rotated by a forward/reverse motor M. When the starting end side of the vertical conveyance chain 9 is swung by rotating the screw conveyor 18, the terminal end 9a side of the vertical conveyance chain 9 rotates, and this terminal end 9a becomes the feed chain. The starting end 12a of 12 is approached and moved away from the starting end 12a.

Further, in this embodiment, as shown in FIG. 5, the screw conveyor 18 is provided with a presser plate 19 for locking the operating lever 17, and the presser plate 19 is attached to the base of the presser plate 19. A spring 20 is provided which is constantly pressed to prevent the operating lever 17 from detaching from the screw conveyor 18, and the holding plate 19 and the spring 20 constitute a biasing mechanism.

Furthermore, as shown in FIG. 2, the supply port 11 of the threshing section C is provided with a handling depth detection device culm length sensor 22 for detecting the handling depth (culm length) of grain culms. The detection device 22 is provided with a shallow handling switch 23, a neutral switch 24, and a deep handling switch 25, respectively, and the operation section B has a control column 26 corresponding to each of the above-mentioned switches 23, 24, and 25. A shallow handling indicator lamp 27, a neutral indicator lamp 28, and a deep handling indicator lamp 29 are provided which light up, and furthermore, a main switch 30 and an automatic adjustment switch 31 for operating the handling depth detection device 22 and the forward/reverse rotation motor M are provided. and a semi-automatic adjustment switch 32.

Next, a circuit for automatically or semi-automatically operating the handling depth adjusting device according to the above embodiment is as shown in FIG. 32 are connected in parallel, and the normally open contact 23a of the shallow handling switch 23, the normally open contact 24a of the neutral switch 24, and the normally open contact 25a of the deep handling switch 25 are connected in series to the automatic adjustment switch 31, respectively. When the normally open contact 25a is connected to the base of the switching transistor 35 that turns on and off the switching relay 34 that switches the electrodes of the forward/reverse motor M, and when the operating lever 17 reaches the uppermost position of the screw conveyor 18, The base of the switching transistor 35 is short-circuited to ground via the stroke end switch 36 which is turned on.

Further, the normally closed contact 24c of the neutral switch 24 is connected to the normally open contact 23a of the shallow handling switch 23,
The normally closed contact 24c is connected to the base of a switching transistor 38 of a stop relay 37 that switches the electrodes of the forward/reverse motor M to momentarily stop the forward/reverse motor M. This switching transistor 38 is connected via a stroke end switch 39 that is turned on when the operating lever 17 reaches this position.
Connect the base of the short circuit to ground.

Further, the stop relay 37 is energized only when the switching relay 34 is energized.
The base of one switching transistor 35 is connected to the base of the other switching transistor 38 via a diode 40, and the relay switches 34a, 34b of the changeover relay 34 and the relay switches 37a, 37b of the stop relay 37 are connected to the forward/reverse motor. A forward/reverse motor M is connected to a power source 33 via a breaker 41 that is cut off when a load above a certain level is applied to M, and each contact 23a, 24a,
When the relays 34 and 37 are actuated via the relays 25a, the forward/reverse motor M rotates in the normal direction, thereby causing the screw conveyor 18 to rotate in the normal direction and the operating lever 17 to move upward, thereby moving the terminal end of the vertical conveyance chain 9. 9a from the deep handling position to the shallow handling position, and when the stop relay 37 is activated via each contact 23a, 24c, the forward/reverse rotation motor M is reversely rotated, thereby causing the screw conveyor 18 is reversed, the operating lever is lowered, and the terminal end 9a of the vertical conveyance chain 9 is displaced from the shallow handling position to the deep handling position.

Next, a semi-automatic adjustment switch 32 connected to a power supply 33 in parallel with an automatic adjustment switch 31 via a main switch 30 has a pair of contacts 32a and 32b connected to the non-power side of each contact 25a and 24c, The semi-automatic adjustment switch 32 has one contact 32a.
When connected to , the forward/reverse motor M rotates forward,
When connected to the other contact 32b, the forward/reverse motor M rotates in the reverse direction, thereby making it possible to adjust the handling depth.
On the non-power side of 0, there are normally open contacts 23 of a shallow switch 23, a neutral switch 24, and a deep switch 25.
Normally open contacts 23b, 24b, 25b that open and close in conjunction with a, 24a, 25a are connected, and a shallow handling indicator lamp 27 and a neutral indicator lamp 28 blink by opening and closing of these normally open contacts 23b, 24b, 25b.
and a deep handling indicator lamp 29 are provided. still,
On the non-power side of the normally open contacts 23b, 24b, 25b, there are two normally closed contacts 42 at the same time when energized.
Three relays 42, 43, 44 are connected to open the a, 42b, 43a, 43b, 44a, 44b, and when the shallow handling switch 23 is on, the relay 42 is energized and displays a neutral display. The energization to the lamp 28 and the deep handling indicator lamp 29 is cut off, and when the neutral switch 24 is on, the relay 43 is energized to cut off the energization to the shallow handling indicator lamp 27 and the deep handling indicator lamp 29, and When the deep handling switch 25 is on, the relay 44 is energized to cut off the power to the shallow handling indicator lamp 27 and the neutral indicator lamp 28.

Since this invention is configured as described above,
First, by observing the length dimensions of grain culms and ears in the field and manually operating the operating lever 17, the starting end of the vertical conveying chain 9 is moved up and down to roughly adjust the handling depth. and the automatic adjustment switch 31 are turned on to perform the reaping work, and while the handling depth is controlled by the handling depth detection device 22, the grain can be threshed in the threshing section C while matching the length of the grain culm and ear tip in the field. In addition, when a long grain culm or a short grain culm outside the automatically adjustable range enters from the supply port 11, one of the stroke end switches 36,
39 operates to support the vertical conveyance chain 9 in a displaced state to the maximum position for shallow handling or deep handling, and by operating the semi-automatic switch 32, the position of the vertical conveyance chain 9 is further displaced. The handling depth can be adjusted.

Further, according to the present invention, if the operating lever 17 is made free by rotating the presser plate 19 overcoming the pressing force of the spring 20, the operating lever 17 can be operated manually in preference to automatic or semi-automatic operation. If there is an operator on board in addition to the driver, or if the control lever 17 can be operated manually from the operation control section B, the combine harvester can be used even if the electric circuit is broken. In addition to being able to quickly adjust the depth of treatment, it is also possible to quickly adjust the depth of treatment.

As described above, in the present invention, the clamping conveyance body 19 of the reaping conveyance unit A that supplies grain culms to the feed chain 12 of the threshing unit C is movably attached to the machine body 2, and the clamping conveyance body 9 is provided with an operating lever 17. Interlocking and connecting,
The handling depth of the handling cylinder 14 can be adjusted by operating the lever 17, and the culm length sensor 2
2 and a forward/reverse motor M are interlocked to connect the sensor 2.
In the combine harvester in which the handling depth can be automatically adjusted by rotating the motor M in forward and reverse directions based on the detection result of 2, a spiral conveyor body 18 connected to the motor M is disposed on the side of the operation operation part B. The conveyor body 18 is characterized in that the lever 17 is engaged and held, thereby producing the following effects.

(a) Even if emergency adjustment is required during the automatic control of the handling depth using the culm length sensor 22 and the forward/reverse motor M, the operation lever 17 near the operating operation section B is operated to be switched to the spiral conveyor body 18. You can easily adjust it manually.

(b) Moreover, in case of emergency manual adjustment, it is only necessary to switch the operation lever 17 to the spiral conveyor body 18, so that the adjustment can be made quickly and reliably even while the conveyor body 18 is rotating.

(c) When incorporating the handling depth adjustment device of the present invention into a conventional manual handling depth adjustment type combine harvester, in addition to equipping the motor M with hydraulic or electrical parts such as a culm length sensor 22 and a forward/reverse rotation motor M, Only a few modifications, such as installing the spiral conveyor body 22 to be connected in series, on the guide plate of the conventional machine are required, so there is no need to move the position of the operating system or a complicated linkage mechanism, and the machine can be made smaller. It can be implemented as a compact and compatible structure. Moreover, modification and maintenance work for this purpose can be performed extremely easily.

[Brief explanation of the drawing]

FIG. 1 is a side view of a combine harvester to which a handling depth adjustment device according to an embodiment of the present invention is applied, FIG. 2 is a plan view of FIG. 1, and FIG. FIG. 4 is an explanatory diagram showing the principle of the handling depth adjusting device of this embodiment. FIG. 5 is an explanatory diagram showing a presser plate that prevents the operating lever from detaching from the screw conveyor. FIG. 6 is a circuit diagram showing an example of the circuit of the above embodiment. A...Reaping conveyance section, B...Driving operation section, C...
Threshing section, M... Forward/reverse motor, 2... Machine body, 9...
...Vertical conveyance chain (pinching conveyor), 12... Feed chain, 14... Handling cylinder, 17... Operation lever,
18... Screw conveyor (spiral conveyor body), 22... Handling depth detection device (culm length sensor).

Claims (1)

[Claims] 1. The clamping carrier 9 of the reaping transport unit A that supplies grain culms to the feed chain 12 of the threshing unit C is movably attached to the machine body 2, and the clamping carrier 9 is equipped with an operating lever 17.
The handling depth of the handling cylinder 14 can be freely adjusted by operating the lever 17, and the culm length sensor 22 and the forward/reverse motor M are connected in an interlocking manner so that the motor can be adjusted based on the detection result of the sensor 22. M
In this combine harvester, the handling depth can be automatically adjusted by rotating forward and backward, a spiral conveyor body 18 connected to the motor M is disposed on the side of the operating section B. A device for adjusting the handling depth of a combine harvester, characterized in that a lever 17 is engaged and held.