JPS6239966B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a handling depth adjusting device for a combine harvester that changes the depth of grain culm supply to a threshing section by adjusting the position of a clamping conveyance body provided in a reaping conveyance section.

Conventionally, it has been possible to perform emergency manual operation using a control lever while the depth of handling is being adjusted by a motor, and also to enable manual adjustment using a control lever even in the event of a failure of the electric circuit or motor.
−92435, Utility Model Publication No. 109031, 1977, Japanese Patent Application Publication No. 1977-
Known from No. 91425.

However, since the former two types use balls to support and guide a screw shaft that is rotated forward and backward by a motor, they have the following problems.

It is necessary to manufacture and support the screw shaft so that it does not swing around, which increases material and processing costs and complicates the device.

In addition, a strong spring force must be used to press the ball to prevent it from coming off while the screw shaft is rotating, and fine dust, etc. generated during the reaping and threshing operation of the combine can enter the ball and clog the screw. This prevents smooth operation of the shaft.

Furthermore, because the ball is pressed by a strong spring force and because fine dust and the like can enter the ball portion, manual operation using the operating lever cannot be performed quickly during emergency adjustments or when an electric circuit breaks down.

On the other hand, in the last type, the lock pin of the operating lever is locked between the teeth of a gear which is rotated forward and backward by a motor, and therefore has the following drawbacks.

When making an emergency adjustment by moving the control lever while the gear is being rotated by the motor, the operation of removing the lock pin from between the teeth and engaging it between the other teeth of the rotating gear cannot be done quickly, and the control lever is often held in the hand. Must be. However, when emergency adjustment is required, this often occurs during reaping and threshing work in fields where culm length changes are significant, fields with many lodging culms, fields with many weeds, etc., so other operations such as traveling gear change operation are also required. As a result, the driver cannot concentrate solely on adjusting the handling depth.

Since the circumferential portion of the gear is used, the amount of movement (vertical elevation) of the clamping conveyor relative to the rotation angle of the gear changes greatly depending on the position of the operating lever, so it is necessary to adjust the handling depth relative to the amount of motor rotation. A complicated control circuit is required to keep the amount constant.

The present invention enables emergency manual operation using a control lever even when the handling depth is being adjusted by a power source such as a motor, and also enables manual adjustment using the control lever even in the event of a failure of the power source. Another object of the present invention is to provide a handling depth adjustment device for a combine harvester that eliminates all of the above-mentioned drawbacks.

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 arranged 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 come to be 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 moved by rotating the screw conveyor 18, the terminal end 9a side of the vertical conveyance chain 9 rotates, and this terminal end 9a moves to the feed chain 12. It approaches and moves 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 22 for detecting the handling depth of grain culms.
2 is provided with a shallow handling switch 23, a neutral switch 24, and a deep handling switch 25, respectively, and in the driving operation section B, lights corresponding to each of the above-mentioned switches 23, 24, and 25 are lit on its control column 26. A shallow handling indicator lamp 27, a neutral indicator lamp 28, and a deep handling indicator lamp 29 are provided, and furthermore, a main switch 30, an automatic adjustment switch 31, and a semi-automatic switch are provided for operating the handling depth detection device 22 and the forward/reverse rotation motor M. An adjustment switch 32 is provided.

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 17 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 supply side of each contact 25a and 24c. , the semi-automatic adjustment switch 32 is connected to one contact 32
When connected to the contact 32b, the forward/reverse motor M rotates in the forward direction, and 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. Further, on the non-power side of the main switch 30, there are normally open contacts 2 of a shallow switch 23, a neutral switch 24, and a deep switch 25.
Normally open contacts 23b, 24b, 25b which open and close in conjunction with 3a, 24a, 25a are connected, and a shallow handling indicator lamp 27 and a neutral indicator lamp 2 blink by opening and closing of these normally open contacts 23b, 24b, 25b.
8 and a deep handling indicator lamp 29 are provided.
In addition, two normally closed contacts 4 are simultaneously connected to the non-power side of the normally open contacts 23b, 24b, and 25b when energized.
2a, 42b, 43a, 43b, 44a, 44b
Three relays 42, 43, and 44 are connected to open the shallow handling switch 23. When the shallow handling switch 23 is on, the relay 42 is energized and the neutral indicator lamp 28 and the deep handling indicator lamp 29 are energized. When the neutral switch 24 is on, the relay 43 is energized to cut off the power 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 43 is excited. 44
is energized to cut off energization 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 then the main switch is turned on. 30 and the automatic adjustment switch 31 are turned on to perform the reaping operation, and while the handling depth is controlled by the handling depth detection device 22 to match the length of the grain culm and ear tip in the field, the threshing section C is
In addition, when a long grain culm or a short grain culm outside the automatically adjustable range enters from the supply port 11, either stroke end switch 3
6 and 39 are operated to support the vertical conveying chain 9 in a displaced state to the maximum position for shallow handling or deep handling, and by switching the semi-automatic switch 32, the position of the vertical conveying chain 9 is further displaced. You can adjust the depth of treatment.

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 in detail above, the present invention provides the reaping conveyance section A
Threshing section C
In a handling depth adjustment device for a combine harvester that changes the depth of grain culm supply to a combine harvester, a spiral conveyor body 18 that rotates forward and backward is provided in a substantially straight line, and an operating lever 17 connected to the conveyor body 9 is connected to the spiral conveyor body. 18 so that it can be engaged and detached from one side, and the operating lever 17 is provided with biasing mechanisms 19 and 20 that bias it in the direction of engagement with the spiral conveyor body 18, resulting in the following effect. It has come to be effective.

Operation lever 17 for spiral conveyor body 18
It is easy to manufacture, assemble, and maintain as it requires only a simple configuration of pressing and biasing it so that it can be engaged and detached.
It is possible to downsize the handling depth adjustment device that allows manual adjustment in the event of an emergency or failure.

Fine dust and the like generated during the reaping and threshing work easily fall through the gaps in the spiral conveyor body 18, so that no clogging occurs and the operation of the spiral conveyor 18 is not hindered.

During manual operation, the operating lever 17 can be removed against the biasing mechanisms 19, 20 and immediately replaced with another part of the spiral conveyor body 18, so that the operation can be performed extremely quickly and easily.

Rotation amount of spiral conveyor body 18 and clamping conveyor body 9
The relationship between the amount of movement and the amount of movement can be kept substantially constant regardless of the position of the operating lever 17, which is practical.

Moreover, emergency manual operation during depth adjustment using a power source such as a motor, and manual adjustment in the event of a failure of the power source can be performed extremely quickly and reliably.

[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, C... Threshing section, 9... Vertical conveyance chain (pinching conveyance body), 17... Operation lever,
18... Screw conveyor (spiral conveyor body), 19... Holding plate (biasing mechanism), 20... Spring (biasing mechanism).

Claims (1)

[Claims] 1 In a combine handling depth adjustment device that adjusts the position of the clamping conveyance body 9 provided in the reaping conveyance section A to change the depth of grain culm supply to the threshing section C, the spiral conveyor body 18 that rotates forward and backward is abbreviated. An operating lever 17 provided in a straight line and connected to the clamping and conveying body 9 is detachably faced from one side of the spiral conveyor body 18, and the operating lever 17 is connected to the spiral conveyor body 18. A combine harvester handling depth adjustment device characterized in that it is provided with biasing mechanisms 19 and 20 that bias in the engagement direction of the combine harvester.