JPH0137399Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial application field" This invention detects the handling depth of grain culms inserted into the handling chamber with a handling depth sensor installed in the handling opening, and determines the handling depth according to the culm length. This invention relates to a combine harvester handling depth control device that automatically adjusts the depth.

``Prior Art'' Conventionally, as shown in Japanese Utility Model Application No. 55-23070, there has been a technique in which the upper surface of an auxiliary supply plate is provided so as to be movable toward and away from the lower end of a sensor arm of a handling depth sensor.

"Problems to be Solved by the Invention" However, the above-mentioned conventional technology only constantly lifts the auxiliary supply plate in the direction of the sensor arm using a spring, and for example, the handling depth can be adjusted by adjusting the position of the auxiliary supply plate. There were problems such as the inability to perform operations such as changing the depth of the handle, and the difficulty of improving the control function in adjusting the handling depth and improving the handling operability.

Furthermore, as shown in Japanese Utility Model Application Publication No. 51-75827, there is a technique in which an ear guide plate is provided in a cover in which a handling depth sensor is provided so that the grain guide plate can be freely adjusted in distance and distance. Since the cover and the ear guide plate were sandwiched from both sides, even if the grain culm could be adjusted to be fed with a substantially constant pressure, the conveying posture of the grain culm would be disturbed by moving the ear guide plate closer or farther away. However, there were structural and functional problems such as the fact that the handling depth could not be adjusted simply by moving the ear guide plate closer and closer.

``Means for Solving the Problems'' However, the present invention is equipped with a handling depth sensor that detects changes in the length of the grain culm supplied to the handling chamber of the threshing section, and uses information from the handling depth sensor to control the conveying device. In the handling depth control device for a combine harvester, which automatically controls rocking and is provided with an auxiliary supply plate that is arranged opposite to the tip of the sensor arm of the handling depth sensor so as to be able to approach and separate, the auxiliary supply plate is arranged with the sensor arm on the upper side. The lower end side of the sensor arm is provided on the upper surface side facing each other, and the auxiliary supply plate is connected to a setting operation lever provided near the driver's seat, and the distance between the tip of the sensor arm and the auxiliary supply plate is changed by operating the setting operation lever. This feature is characterized in that it is configured to change the handling depth of grain culms.

"Operation" Therefore, since the tip of the grain culm that is supported by the upper surface of the auxiliary supply plate and slides comes into contact with the tip end of the sensor arm, the change in the layer thickness of the tip of the grain culm that becomes tapered is utilized. By moving the auxiliary supply plate toward and away from the tip of the sensor arm, the position of the ear tip detected by the sensor arm changes in the length direction of the grain culm, and the handling depth of the grain culm can be changed. The detection reference value (dead band) of the handling depth sensor can be changed mechanically by manual remote control of the lever, and the relative position of the handling barrel of the threshing section and the handling depth sensor is kept constant while the tip of the grain culm is being changed. It is easy to obtain the handling depth suitable for the grain length, etc., and it is easier to switch between different grain culms such as rice or wheat, and to prevent unhandled grains than before. Even when culms or short culms are supplied in a limited manner, rapid changes in culm length can be appropriately coped with simply by operating the setting operation lever without interrupting the harvesting operation.

"Embodiment" An embodiment of the present invention will be described below in detail based on the drawings. Fig. 1 is an overall side view of the combine harvester, and Fig. 2 is a plan view of the same. and a machine stand supported via an elevating cylinder 5, 6 a threshing section with a field chain 7 stretched on the left side and a built-in handling cylinder 8, 9 a reaping section equipped with a cutting blade 10 and a grain culm conveying mechanism 11; 12 is a straw cutting section provided behind the threshing section 6; 13 is a paddy tank that stores the grain taken out from the threshing section 6 via the grain lifting cylinder 14; and 15 is an engine that drives each operating section of the combine harvester. , 16
1 is a driver's cab equipped with a driver's seat 17 and a driving operation section 18, and is configured to continuously reap grain culms and perform threshing processing.

As shown in FIG. 3, the front plate 19 of the threshing section 6
A detection device 21, which is a handling depth sensor that detects the handling depth of the grain culm inserted into the threshing section 6 from the handling opening 20, is installed at the handling opening 20 position, and the detection device 21 is installed at the handling opening 20 position, and the detection device 21 is a handling depth sensor that detects the handling depth of the grain culm inserted into the threshing part 6 from the handling opening 20. The tilt angle of the device 22 is provided to be automatically varied, and the handling depth is automatically adjusted.

As shown in FIGS. 4 and 5, the detection device 2
1 includes a sensor box 23, a mounting plate 26 provided in the box 23 through an elongated hole 24 and a set bolt 25 so as to be adjustable in left-right movement; A pair of sensor arms 28 and 29 are attached at the ends, micro switches 30 and 31 are operated by these sensor arms 28 and 29, and the sensor arms 28 and 2
In order to maintain the tip of the arm 28,
29 and return springs 32 and 33 provided between the sensor box 23 and the mounting plate 26.
The tips of the sensor arms 28 and 29 projecting downward are made to face the transport flow direction of the grain culm inserted into the threshing section 6 through the handling port 20, and the sensor arms 28 and 29 come into contact with the transported grain culm. The arms 28 and 29 are rotated against the springs 32 and 33 to operate the switches 31 and 31, respectively.

Further, an auxiliary supply plate 35 is interposed between the detection device 21 and the inlet supply plate 34 of the handling port 20. The auxiliary supply plate 35 has its base end fixedly supported by a pivot shaft 37 rotatably attached to the front side plate 19 via bearings 36, 36, and has a swing arm at one end of the shaft 37. The base end of the arm 38 is attached, and the tip of the arm 38 is connected via a wire 39 to a setting operation lever 40 installed near the driver's seat 17.

The lever 40 has its base end attached to the driver's seat frame on the shaft 4.
1, and the intermediate portion is locked in a notch groove 43 of a guide plate 42 for adjusting the handling depth, and the tip of a swing plate 44 attached to the base end is connected to the wire 39 via a spring 45. Then, by switching the lever 40, the auxiliary supply plate 35 is rotationally displaced, and the distance between the supply plate 35 and the sensor arms 28, 29 is adjusted to the minimum gap other than the standard gap M, as shown in FIG. The configuration is such that stepwise switching can be performed between H and the maximum distance L. Note that 46 is a return spring 46 that is tensioned on the swing arm 38.

Next, as shown in FIG. 6, the vertical conveyance device 22 has an inclined lower end supported by a handling depth adjustment fulcrum 47, and an intermediate portion connected to a piston rod 49 of a hydraulic cylinder 48, so that the vertical conveyance device 22 can be moved vertically by moving the rod 49 forward and backward. The inclined upper end of the conveyance device 22, that is, the transfer terminal end, is moved toward and away from the terminal end of the field chain 7 as appropriate to adjust the handling depth.

A chamber 50a on one side across from the piston 49a of the hydraulic cylinder 48 has a 3-position 4-port electromagnetic switching valve 5.
1 and a hydraulic oil tank 5 via a hydraulic pump 52.
3, the chamber 50b on the other side is directly connected via piping to the tank 52 via the switching valve 51, and a relief valve 54 is connected to the discharge side of the hydraulic pump 52. Further, the vertical conveyance device 22 is equipped with a switch 55 for detecting grain culms being transferred.

As shown in FIG. 7, the normally open contact 55a of the switch 55, the normally closed contact 30a of the micro switch 30, and the solenoid 58 of the switching valve 51 are connected to the battery 56 via a select switch 57 for automatic/manual switching. The handling circuit and the normally open contact 31a of the micro switch 31 and the shallow handling circuit of the solenoid 59 of the switching valve 51 are connected in parallel, and the battery 56 and each solenoid 5 are connected in parallel.
Manual switches 60 and 61 are connected between the terminals 8 and 59, respectively.

The normally closed setting 30a of the micro switch 30 is set such that it is "on" when the sensor arm 28 is pressing the actuator 30b of the micro switch 30, and is "off" when the pressure is released. The micro switch 31 is configured to be turned on when the sensor arm 29 presses the actuator 31b of the micro switch 31, and turned on when the pressure is released.

This embodiment is configured as described above, and when the select switch 57 is turned on to perform reaping work and the harvested grain culm is transported by the vertical conveyance device 22, the switch 56 is detected, the contact 55a of this switch 55
is turned on and the solenoid 58 is energized, so the switching valve 51 is switched and hydraulic oil from the hydraulic pump 52 is supplied to the chamber 50b on the other side of the cylinder 48, and the piston rod 49 moves in the direction of arrow a in FIG. As a result, the vertical conveyance device 22 swings counterclockwise (deep handling side) and its inclination angle becomes steeper.

Next, the grain culm transported by the vertical transport device 22 is inserted into the handling chamber through the inlet supply plate 34 and the handling port 20, and the grain culm is transferred to the detection device 21.
When the microswitches 30 and 31 come into contact with the sensor arms 28 and 29, the settings 30a and 31a of the microswitches 30 and 31 are actuated, respectively, and one solenoid 59 is energized. As a result, the electromagnetic switching valve 51 is switched, hydraulic oil from the hydraulic pump 52 is supplied to the chamber 50a on one side of the cylinder 48, the piston rod 49 is moved in the direction of arrow b in FIG. 6, and the vertical conveyance device 22 is moved clockwise. (shallow handling side) and make the inclination angle gentler.

When the grain culm is in contact with only one sensor arm 28, the settings 30a and 31a of the microswitches 30 and 31 are both off, so the electricity to the solenoids 58 and 59 is cut off, and the vertical conveyance The device 22 is such that its swinging is stopped while the tip of the grain culm, that is, the ear tip, is maintained between the sensor arms 28 and 29.

In addition, when it is desired to change the set reference value of the handling depth during the above-mentioned work, the lever 40 can be used.
This is done by variably adjusting the gap between the sensor arms 28, 29 and the auxiliary supply plate 35 by operating the sensor arms 28, 29 as shown in FIG.
If you wish to change the handling depth to the deep handling side while working with the distance between the auxiliary supply plate 35 set to the minimum clearance H, then move the adjustment lever 40 in the direction of the solid line arrow in FIG. to displace the auxiliary supply plate 35, and the sensor arm 28,
29 is expanded to a gap T. As a result, the tip of the grain culm does not come into contact with the sensor arm 28 in the previous handling depth state, and the hydraulic cylinder 48 moves the vertical conveyance device 22 until the tip of the grain culm comes into contact with the sensor arm 28 as before. The set reference value of the handling depth is changed from shallow handling to deep handling by swinging it to the deep handling side. Further, contrary to the above, when it is desired to change the reference value from a deep handling state to a shallow handling state, the interval between the sensor arms 28, 29 and the auxiliary supply plate 35 is appropriately reduced.

"Effects of the Invention" As is clear from the above embodiments, the present invention is equipped with a handling depth sensor 21 that detects changes in the length of the grain culm supplied to the handling chamber of the threshing section 6, and information of the handling depth sensor 21 is provided. The swinging of the conveying device 22 is automatically controlled by the sensor arm 28 of the handling depth sensor 21,
Auxiliary supply plate 35 that is attached to the tip of 29 so as to be able to move toward and away from it.
In a combine harvester handling depth control device,
The sensor arms 28 and 29 are provided on the upper side of the auxiliary supply plate 35 with the lower ends facing each other, and the auxiliary supply plate 35 is provided on the setting operation lever 40 provided near the driver's seat 17.
are connected to each other, and the distance between the tips of the sensor arms 28 and 29 and the auxiliary supply plate 35 is adjusted using the setting operation lever 4.
The handling depth of the grain culm can be changed by changing the handling depth of the grain culm by changing the handling depth of the grain culm, and the tip of the grain culm, which is supported by the upper surface of the auxiliary supply plate 35 and slides, is located on the tip side of the sensor arms 28 and 29. By using the change in the layer thickness of the tip of the grain culm, which tapers, and moving the auxiliary supply plate 35 toward and away from the tips of the sensor arms 28 and 29, the tips detected by the sensor arms 28 and 29 are The position changes in the length direction of the grain culm, and the handling depth of the grain culm can be changed, and the detection reference value (dead zone) of the handling depth sensor 21 can be adjusted mechanically by manual remote control of the setting control lever 40. It is possible to easily obtain a handling depth suitable for the length of the tip of the grain culm, etc. while keeping the relative position of the handling cylinder 8 of the threshing section 6 and the handling depth sensor 21 constant. This makes it easier to switch between different types of grain culms such as rice or wheat, and to prevent unhandled grains than before, and in addition, during continuous harvesting, extremely long or short culms can be partially limited and supplied. Even when it is done,
Setting operation lever 4 without interrupting harvesting work
This has practical effects such as being able to appropriately respond to sudden changes in culm length with just zero operation.

[Brief explanation of the drawing]

Fig. 1 is an overall side view of the combine harvester, Fig. 2 is a plan view thereof, Fig. 3 is an explanatory diagram of the main parts, Fig. 4 is an enlarged explanatory diagram of the sensor section, Fig. 5 is an explanatory diagram of the system of the main parts, FIG. 6 is an explanatory diagram of the main part of the drive system, FIG. 7 is an electric circuit diagram, and FIGS. 8 and 9 are explanatory diagrams of the operation of the main part. 6... Threshing section, 17... Driver's seat, 21... Handling depth sensor, 22... Conveying device, 28, 29... Sensor arm, 35... Auxiliary supply plate, 40... Setting operation lever.

Claims (1)

[Scope of utility model registration request] The handling depth sensor 21 is equipped with a handling depth sensor 21 that detects a change in the length of the grain culm supplied to the handling chamber of the threshing section 6.
A handling depth control device for a combine that automatically controls the swinging of a conveying device 22 based on the information of No. 1, and is provided with an auxiliary supply plate 35 that is disposed opposite to the tips of the sensor arms 28 and 29 of the handling depth sensor 21 so as to be able to approach and separate. , the sensor arms 28, 29 are placed on the upper surface side of the auxiliary supply plate 35 with the sensor arms 28, 29 on the upper side.
The auxiliary supply plate 35 is connected to a setting operation lever 40 provided with its lower ends facing each other and provided near the driver's seat 17, and the distance between the tips of the sensor arms 28 and 29 and the auxiliary supply plate 35 is set by the setting operation lever 400. 1. A combine harvester handling depth control device, characterized in that it is configured to change the handling depth of grain culms by changing it by operation.