JPS6337787Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention is configured to supply grain culms that have been harvested by a reaping processing section that is connected to the present machine equipped with a threshing device so as to be operable up and down, and also has a culm length detection mechanism. Regarding a combine harvester equipped with an automatic handling depth adjustment device that automatically operates the handling depth adjustment mechanism to maintain a set handling depth based on the detection result of The purpose is to stabilize the adjustment operation.

The combine harvester mentioned above was designed to save labor by automating the handling depth adjustment, but in the past, when the culm length detection mechanism detected a change in culm length, the handling depth was adjusted immediately, so it was ignored. The handling depth has to be adjusted even when the culm length suddenly fluctuates, which may cause a problem in that it is difficult to perform a stable handling depth adjustment operation.

The present invention has been developed with the above-mentioned circumstances in mind, and in the combine harvester having the above-mentioned structure with an automatic handling depth adjustment device, only when the culm length detection mechanism detects a change in culm length continuously for a set period of time. A delay mechanism is incorporated to adjust the handling depth, and the operation of the delay mechanism is stopped based on a detection result of an elevation operation state detection mechanism that detects that the reaping processing section is being operated up and down. It is characterized by incorporating a delayed activation/stop mechanism.

In other words, by incorporating a delay mechanism, the handling depth is adjusted only when the culm length detection mechanism detects a change in culm length continuously for a set period of time, so even if the culm length suddenly changes, the handling depth will not be affected. This eliminates the above-mentioned problem and makes it possible to perform stable automatic handling depth adjustment. In addition, this proposal incorporates a delay operation stop mechanism that stops the operation of the delay mechanism,
When the reaping processing unit is raised or lowered to adjust the cutting height, etc., the handling depth can be adjusted appropriately without delay to accommodate the large range of culm length fluctuations caused by this. This allows accurate handling depth adjustment. More specifically, if a delay activation/stop mechanism is not incorporated, the handling depth will be adjusted in response to the time delay caused by the delay mechanism and the large range of culm length fluctuations caused by the lifting and lowering of the cutting section. Due to the time delay required to operate the device to the desired adjustment state, a large amount of grain culm will be processed at a handling depth that deviates from the appropriate handling depth, but in this proposal, this can be avoided as much as possible. It is. As a result, a combine harvester equipped with an automatic handling depth adjustment device, which can be used more conveniently as a whole, has been obtained.

Embodiments of the present invention will be described in detail below based on the drawings.

Figure 1 shows the front side of the combine, including a crawler traveling device 1, a threshing device 2, and a driver's seat 3.
The front part of this machine is equipped with a device 4 for pulling up multiple rows of grain culms planted in the field, a reaping device 5 for cutting the base of the raised grain culms, and a conveying device 6 for merging the harvested grain culms. , a reaping processing section 9 consisting of a rear conveying device 8 and the like conveys the merged grain culms rearward and supplies them to the threshing feed chain 7 in a sideways posture at the end of conveyance, using a hydraulic cylinder 21. They are connected to each other so that they can be moved up and down around a fulcrum P. Reference numeral 22 in the figure is an elevating operation lever for elevating and lowering the reaping processing section 9 by switching the valve that controls the expansion and contraction operation of the cylinder 21, as shown in FIG.
It is configured to be swingable back and forth between a lifting stop position ST, a lowering operation position DOWN, and a raising operation position UP.

As the process progresses, the grain culms planted in the field are raised and harvested, and the harvested grain culms are sequentially handled and threshed automatically and continuously. In addition, the reaping processing unit 9 performs the reaping process according to reaping conditions such as the degree of unevenness existing in the field and changes in the hardness and softness of the ground in the field.
The cutting height can be adjusted by raising and lowering the mower. The reaping processing section 9 is raised to the stroke end when traveling on the road, and is lowered to near the ground during reaping work.

Next, the automatic handling depth adjustment device will be explained based on FIGS. 1 to 4.

The feed chain 7 at the end of the conveyance is changed by vertically changing the position of the starting end of the rear conveyance device 8 around the fulcrum Q at the end, and changing the grain culm support position at the start end in the culm length direction. The electric motor 10 is configured as a handling depth adjustment mechanism that changes the grain culm delivery position to the grain culm and, as a result, changes the insertion amount of the grain culm tip into the threshing device 2, and is capable of forward and reverse rotation.
An output shaft 11 is interlocked and connected via a worm deceleration mechanism 12 and a chain 13 to a link mechanism 14 that changes the position of the rear conveyance device 8 .

A culm length detection mechanism 15 is attached to the pulling device 4. This detection mechanism 15 consists of three culm presence/absence detection sensors 15a, 15b, 1 that are pressed and swung by the grain culm at appropriate intervals in the culm length direction of the raised grain culm.
5c are arranged in parallel, and each sensor 15a, 15b, 15
The culm length is detected in four stages by electrically detecting the oscillating displacement of c using sensor switches Sa, Sb, and Sc. That is, a first grain culm shorter than the lower sensor 15c, a second grain culm between the lower sensor 15c and the intermediate sensor 15b,
The third grain culm is between the middle sensor 15b and the upper sensor 15a, and the fourth grain culm is longer than the upper sensor 15a.
It is configured to determine the culm length of the grain culm.

The worm deceleration mechanism 12 has a function to detect the swinging position of the rear conveyance device 8 at the attachment part thereof, and a mechanism for adjusting the conveyance device 8 in advance according to the culm length based on the four-step detection results of the culm length detection mechanism 15. A rotary slide that operates the motor 10 at four set positions and maintains the set handling depth by changing the position, and operates the motor 10 in forward and reverse directions based on commands from the manual operation switch SW ₁ . A contact type switch mechanism 16 is provided. This sliding switch mechanism 16 is connected to each of the sensor switches Sa, Sb, and Sc of the culm length detection mechanism 15, respectively, and
In addition, fixed contacts a, b, c, a', b', c' connected to the human-operated switch SW ₁ and a pair of forward/reverse operation control relays 17 and 18 of the electric motor 10 are provided. A pair of fixed contacts e, e' connected in the shape of a partial arc, and a pair of movable contacts f, f' that are integrally rotatable and have three divided contact parts connected to each other, the movable contact f,
The support member 19 of f' is connected to the worm deceleration mechanism 12.
The output shaft 20 is fixed to and rotated.

Also, in the electrical circuit diagram shown in Figure 4, SW ₂
The rear conveyance device 8 is set in advance according to the culm length based on the detection result of the culm length detection mechanism 15.
An automatic operation state in which the motor 10 is used to automatically drive the rear transport device 8 to a desired position based on a command from the manual operation switch SW ₁ . This is a switch that can be switched between the automatic operation contact A and the manual operation contact M. SW ₃ is a main switch, and Sd is a sensor switch that switches between automatic operation and non-operation in the automatic operation state. It is configured to be operated by the culm presence/absence detection sensor 15d that is pressed against the culm.
Further, L is a lamp indicating that the operation is being performed in the automatic operation state.

The operation of the automatic handling depth adjusting device having the above configuration will be explained.

As the grain culm becomes shorter, in order to move the rear conveyance device 8 downward and operate it for deeper handling, contact points using fixed contact e', movable contact f', and fixed contacts a', b', and c' are used. Using a circuit, energize the deep handling side relay 17,
The motor 10 is driven in normal rotation toward the deep handling side. When the support member 19 is rotated clockwise by the drive of the motor 10 and the movable contact f' is disengaged from the lowest one of the sensor switches Sa detecting the absence of a culm, at this point The relay 17 is de-energized and the motor 10 is stopped. Therefore, during deep handling operations, each fixed contact a′, b′,
It has stopping positions F ₃ , F ₂ , F ₁ near the clockwise ends of c′, respectively, and these positions F ₃ , F ₂ ,
Each of F ₁ is set to correspond to each of the third, second, and first grain culms.

Conversely, as the grain culm becomes longer, the rear conveyance device 8
To move the position upward and operate it in a shallow manner, move the fixed contact e, the movable contact f, the fixed contacts a, b,
Using the contact circuit according to c, the shallow handling side relay 18
When energization is applied and the support member 19 is rotated counterclockwise by the drive of the motor 10, the movable contact f is removed from the uppermost one of the sensor switches Sa detecting the presence of a culm. At this point, the relay 18 is de-energized and the motor 10 is stopped. Therefore, during shallow handling operation, the stop positions of F ₄ , F ₃ , and F ₂ are provided near the counterclockwise ends of each of the fixed contacts a, b, and c, respectively.
These positions F ₄ , F ₃ , F ₂ are the fourth, third and second positions.
It is set to correspond to the grain culm.

Furthermore, by switching the manually operated switch SW ₁ to the shallow handling contact point U or the deep handling contact point D, the rear conveyance device 8 is stopped at that position when the switch SW ₁ is returned to the neutral position. However, the position can be changed steplessly.

Further, a delay mechanism 23 is incorporated to adjust the handling depth only when the culm length detection mechanism 15 continuously detects fluctuations in the culm length for a set period of time, and the reaping processing section 9 is operated up and down. A delayed operation stop mechanism is incorporated which stops the delayed operation of the delay mechanism 23 based on the detection result of the elevating operation state detection mechanism 24 that detects that the elevating operation state is present.

The delay mechanism 23 uses capacitors C ₁ and C ₂ and transistors T ₁ , T ₁ and T ₂ , T ₂ to
Even if the signal from the sliding contact type switch mechanism 16 is transmitted, the relays 17 and 18 are not energized immediately, but are delayed for an appropriate set time until the capacitors C ₁ and C ₂ finish discharging. relay 17,
18 is configured to be energized and activated.

The delayed operation stop mechanism includes the capacitor C ₁ ,
C ₂ is directly grounded without going through the sliding contact switch mechanism 16 to stop the delayed operation. An electric switch 24a is provided which is pressed only when the electric switch 24a is at the stop position N, and the state of the lifting/lowering operation is detected depending on whether or not the switch 24a is pressed. In this state, the capacitors C ₁ and C ₂ are connected to ground.

The present invention can also be applied to a case where the raising and lowering operation of the reaping processing section 9 is automatically performed in order to maintain the set height based on the detection result of the device that detects the height above the ground.

[Brief explanation of the drawing]

The drawings show an embodiment of a combine harvester with an automatic handling depth adjustment device according to the present invention, FIG. 1 is a schematic side view of the front part of the combine, FIG. 2 is a schematic side view showing the position change operation structure of the rear conveyance device, 3 is a longitudinal sectional front view of the same structure, FIG. 4 is an electric circuit diagram, and FIG. 5 is a side view showing the mounting portion of the lift operation lever. 2... Threshing device, 8... Handling depth adjustment mechanism, 9...
... Reaping processing unit, 15 ... Culm length detection device, 23 ...
Delay mechanism, 24... Lifting operation state detection mechanism.

Claims (1)

[Scope of utility model registration request] It is configured to supply the grain culm harvested by a reaping processing section 9 connected to this machine equipped with a threshing device 2 so as to be operable up and down, and to supply the grain culm to the threshing device 2, and is set based on the detection result of the culm length detection mechanism 15. The combine harvester is equipped with an automatic handling depth adjustment device that automatically operates the handling depth adjustment mechanism 8 to maintain the handling depth at the handling depth, and the culm length detection mechanism 15 continuously detects the culm length for a set time. Delay mechanism 2 for adjusting the handling depth only when a change in the
3, and a delay operation stop mechanism that stops the operation of the delay mechanism 23 based on the detection result of the lifting operation state detection mechanism 24 that detects that the reaping processing section 9 is being operated up and down. A combine harvester with an automatic handling depth adjustment device.