JPS6317409B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a method for handling grain culms in a combine harvester in which the handling depth of grain culms is automatically controlled to be substantially constant regardless of the length of the grain culms. The present invention relates to a device for detecting length.

[Conventional technology and its problems]

Conventionally, it has been known that the handling depth can be kept approximately constant by manually increasing or decreasing the inclination angle of the grain conveying device that transports the harvested grain culm to the threshing device in a combine harvester. Adjusting the depth was extremely troublesome.

Therefore, a detection device is installed to detect the length of the grain culm before the harvested grain culm is transferred to the threshing device. It would be fine if it were to operate automatically so that the handling depth is approximately constant depending on the length of the grain culm, but when detecting the length of the grain culm, special measures should be taken in the configuration of the detection device. If not added, the sensor of the detection device installed to detect the length of the grain culm will disturb the posture of the grain culm, adversely affecting the threshing action, and may cause the length of the grain culm to be incorrectly detected. Therefore, it cannot be detected accurately.

SUMMARY OF THE INVENTION An object of the present invention is to provide a device that can accurately detect the length of a grain culm without erroneous detection, without disturbing the attitude of the grain culm during transportation.

[Means for solving problems]

For this reason, the present invention provides a grain culm conveying device that transports the grain culm harvested by the reaping device to the threshing device, and the grain culm conveying device is connected to the grain culm to be fed to the threshing device at a handling depth of In a combine configured to operate at a substantially constant rate depending on the length of the grain culm, the sensor for operating the grain culm conveying device is provided with a contact portion with which the grain culm being transferred comes into contact, and the sensor The body is pivoted at a portion away from the contact portion so as to rotate and displace following the movement of the grain culm when the grain culm comes into contact with the contact portion, and the sensing body includes a sensor body. The structure is such that a return spring is provided against rotational displacement.

[Action/effect of the invention]

With this configuration, the sensing body equipped with the contact portion with which the grain culm comes into contact is rotated and displaced to follow the movement of the grain culm when the grain culm comes into contact with the contact portion, while the sensing body Since the body is pivoted at a location away from the contact area, the sensing body follows the movement of the grain culm and can be rotated by a large amount with a relatively light force without twisting. By bringing the grain culm into contact with the contact portion of the sensing body, disturbances in the posture of the grain culm can be minimized.

Furthermore, by providing the return spring in the sensing body, the sensing body immediately returns to its original position when the grain culm no longer comes into contact with its contact portion, making it possible to accurately detect the length of the grain culm. Moreover, since this return spring acts as a so-called damper that dampens the vibration of the sensing body, it is possible to reliably prevent erroneous detection of the grain culm length from occurring due to the vibration of the sensing body.

Therefore, according to the present invention, the length of the grain culm during transportation can be accurately detected without disturbing the attitude of the grain culm and without false detection. Accordingly, it is possible to automatically control the handling depth of the grain culm to a substantially constant value in a reliable and accurate manner.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings. In the drawings, reference numeral 2 indicates a threshing device with a feed chain 1 mounted on the upper surface of the traveling body of the combine harvester. , a pair of grain culm root raking devices, a grain culm lifting device (none of which are shown), and a grain culm root conveying device 3 are provided.

Reference numeral 4 indicates a grain culm transport device installed in an inclined manner between the terminal end of the grain culm stock source transport device 3 and the feed chain 1, and the grain culm transport device 4 includes:
As is well known in the art, the grain culms from the grain culm stock transfer device 3 are transferred to the feed chain 1 in a sandwiched state.

A vertical axis transmission lower case 6 is provided on the horizontal axis outer tube 5 so as to be rotatable only, and a vertical axis transmission upper case 7 is connected to the upper end portion of the vertical axis transmission lower case 6 so as to be rotatable only,
The grain culm conveying device 4 is attached to the upper end of the transmission case 8 fixed to the end thereof, so that the grain culm conveying device 4 moves in the direction of arrow A. In other words, the feed chain 1 and the grain culm stock The configuration is such that the relative position relative to the original transport device 3 can be changed.

Inside the horizontal axis outer tube 5, the vertical axis transmission lower case 6, and the vertical axis transmission upper case 7, power is transmitted by a transmission shaft and a bevel gear. is the grain culm conveying device 4
It is equipped with a sprocket and a chain for power transmission to the grain culm conveying device 4, and is configured to drive the grain culm conveying chain 9 in the grain culm conveying device 4.

Reference numeral 10 indicates an operation link, and the operation link 10
The distal end portion 11 of the operating lever 10 is rotatably locked to the grain culm conveying device 4, while the other end of the operating link 10 is formed into an L-shape 12, and this L-shaped portion 12 is connected to the Y-shaped operating arm. 13. By rotating the operating arm 13 forward and backward in the directions of arrows A and B using the servo motor 15, the grain culm conveying device 4 is operated, thereby forming a handling depth adjusting device. The operating link 10 is slidably supported by a pair of bearings 20.

In FIG. 1, symbols a, b, and c all indicate detection devices provided on the upper surface of the entrance iron plate 14 in the threshing device 2, and among these, symbol a detects the long culm located at the farthest part from the feed chain 1. The device, symbol c, indicates a short culm detection device located at the part closest to the feed chain 1, and symbol b indicates a standard detection device located approximately in the middle thereof. It is constructed as shown in FIGS.

That is, the reference numeral 16 in FIGS. 2 and 3
is a plate-shaped sensing body with an appropriate width l, and is configured so that the grain culm being transferred rides on the upper surface of the sensing body 16 to be slid and conveyed. The side tip is curved upward to provide a contact portion 16' for contacting the grain culm, and is rotatably fixed on a shaft 17 standing from the entrance iron plate 14 at a position away from the contact portion 16'. When the grain culm being transferred comes into contact with the contact portion 16', a force is applied in the direction of the arrow f, and the sensing body 16 is configured to follow the grain culm and rotate as shown by the dotted line, and This sensing body 16 is provided with a return spring 18 for returning the sensing body 16 to the original position indicated by the solid line. Also, when this sensing body 16 is rotated as shown by the dotted line, the leaf spring 19 provided thereon is
It is configured so that the micro switch 21 is turned on by contacting the micro switch 21.

The servo motor 15 and each of the detection devices a,
b and c (more precisely, the microswitch 21 in each of the detection devices a, b, and c) are connected as shown in FIG.

In this FIG. 4, symbol E is a power supply, symbol R1,
R2 and R3 each indicate a relay, and relay R1 is
The servo motor 15 is designed to rotate in the direction of arrow A when all the micro switches 21 in each of the detection devices a, b, and c are turned on.

The relay R2 is connected to the micro switch 21 in the detection devices b and c among the detection devices a, b, and c.
The servo motor 15 is designed to stop rotating when turned ON.

Further, the relay R3 is designed so that the servo motor 15 rotates in the direction of arrow B when only the micro switch 21 in the detection device c among the detection devices a, b, and c is turned on.

In this configuration, the harvested grain culm is transferred from the grain culm stock source transport device 3 to the grain culm transport device 4,
After the posture is changed to a substantially horizontal state, the threshing device 2
The grain is sent to the feed chain 1 at the farm where it is threshed.

At this time, if the grain culm is long and the handling depth of the grain culm is deeper than the standard value, the grain culm is sliding on the top surface of all the detection devices a, b, c, By turning on the micro switch 21 in each of the detection devices a, b, and c, the servo motor 1
5 rotates in the direction of arrow A.

By this rotation, the inclination angle of the grain culm conveying device 4 is changed to the state shown by the dotted line in FIG. Since the gripping position of the grain culm changes at this point, the handling depth is corrected to become shallower, and as a result of this modification, the grain culm is held in place by the detection device b of each detection device a, b, and c. , c, the micro switches 21 of the detection devices b and c are turned on, and the servo motor 1 is turned on.
5 will stop rotating.

In addition, if the grain culm is short and the handling depth of the grain culm is shallower than the standard value, the grain culm will be detected by the detection device c located at the plant base most among the detection devices a, b, and c. By riding only on the top surface and turning on the micro switch 21 in the detection device c, the servo motor 15 rotates in the direction of arrow B, and the grain culm conveying device 4 tilts from the state shown by the dotted line to the state shown by the solid line. Since the angle can be changed, the handling depth is corrected in the direction of increasing the depth, and as a result of this correction, the grain culm comes to rest on the upper surface of the detection devices b and c of each of the detection devices a, b, and c. The micro switches 21 of the detection devices b and c are turned on, and the servo motor 15 is turned on.
rotation will stop.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a front view of the main parts of the combine, FIG. 2 is an enlarged plan view of the detection device, FIG. 3 is an enlarged side view of the detection device, and FIG. 4 is a circuit diagram. be. 1... feed chain, 2... threshing device, 3...
...Grain culm stock transfer device, 4...Grain culm transfer device, 5...
...Horizontal axis outer tube, 6...Vertical axis transmission lower case, 7...
Vertical shaft transmission upper case, 8... Transmission case, 9...
Grain culm conveyance chain, 10...operation link, 13...operation arm, 14...inlet iron plate, 15...servo motor, a, b, c...detection device, 16...sensor,
16'...Contact part, 17...Shaft, 18...Return spring, 21...Micro switch, R1, R2, R
3...Relay.

Claims (1)

[Claims] 1. A grain culm conveying device is installed to transport the grain culm harvested by the reaping device to the threshing device, and the handling depth of the grain culm supplied to the threshing device is determined by the length of the grain culm. In a combine harvester configured to operate at a substantially constant rate according to A shaft is fixed at a part remote from the contact part so that when the grain culm comes into contact with the grain culm, the grain culm rotates and displaces. A detection device for an automatic handling depth control device in a combine harvester, characterized by being provided with a return spring.