JPH0228291B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention includes a handling depth adjusting device for adjusting the handling depth of grain culms in a threshing device, and automatically controls this handling depth adjusting device based on detection of the length of the grain culm. Regarding the combine harvester.

In general, this type of combine harvester uses a contact type sensor that detects the length of the grain culm by contacting it with the grain culm. There are problems such as entanglement, disturbance of the transportation posture of the grain culm to the threshing device, tendency to break the ears of the grain culm during threshing, sensor detection errors, and stagnation of the grain culm near the supply port of the threshing device. Ta.

The present invention was invented to solve this problem, and its purpose is to smoothly transport and supply grain culms to a threshing device without disturbing the conveying posture of the grain culms when detecting the length or shortness of the grain culms. can be made to do,
Moreover, to provide a combine harvester that can always accurately detect the length of grain culms without mistakes, and is equipped with a handling depth adjustment device that eliminates the fear that grain culms will stagnate near the grain culm supply port of a threshing device. It is in.

Embodiments of the present invention will be described below based on the drawings. In the figure, 1 is a machine body equipped with a traveling device 2, and a threshing device 3 is installed on the upper part of the machine body 1, and a reaping device 4 is installed in the front part. At the same time, the grain culm is transported and supplied to the food chain 6 via the vertical conveyance device 5, and when the grain culm is transported to the rear of the machine by the feed chain 6, the grain culm tip side is inserted into the handling chamber of the threshing device 3 through its supply port. 7, and the threshing device 3 is used to thresh the grain. The vertical conveyance device 5 is supported so as to be able to move up and down relative to the machine body 1, and is oscillated by a piston device controlled by a solenoid valve (not shown), thereby controlling the feed chain of the grain culm. The handling depth of the grain culm in the threshing device 3 is adjusted by changing and adjusting the delivery position to the grain culm 6. Therefore, the handling depth adjusting device is constituted by the vertical conveying device 5 including a solenoid valve and a piston device. Hereinafter, this vertical conveyance device 5
This is called a depth adjustment device.

The handling depth adjusting device 5 is adjusted and moved by drive control of the solenoids SOL ₁ and SOL ₂ in the solenoid valve, and the handling depth adjustment device 5 is adjusted and moved by driving and controlling the solenoids SOL 1 and SOL ₂ in the solenoid valve.
The drive control of SOL ₂ is configured to be performed based on the detection of the length of the grain culm.

That is, a long/short culm detection device 8 that detects the length of the grain culm.
As shown in FIG. 2, the grain culm is located facing the grain culm located on the grain culm conveyance path to the threshing device 3, and is located at a different portion of the proper handling depth position, the shallow handling position, and the deep handling position. The reflected light from the grain culm with different angles of incidence is
A reflecting mirror 9a that reflects the reflected light in different directions corresponding to the incident angle of the reflected light, and a reflecting mirror 9a that receives reflected light in different directions reflected from the reflecting mirror 9a, and a traveling direction of the light corresponding to the incident angle of these reflected lights. a convex lens 9c and a concave lens 9 disposed in front of the prism 9b in the direction in which the light emitted from the prism 9b travels.
d, and a plurality of photoelectric elements 10 that are arranged in front of the optical device 9 in the direction of light propagation and detect the positions of each grain culm by receiving the light from the optical device 9. Therefore, the reflecting mirror 9a of the long and short culm detection device 8 configured in this manner is attached, for example, near the grain culm supply port 7 on the grain culm conveyance path.

Therefore, when natural light is irradiated onto the grain culm moving on the grain culm transport path, it is diffusely reflected, and among this diffusely reflected light, a specific reflected light that is reflected at a predetermined angle faces the grain culm on the grain culm transport path. The light is incident on a reflecting mirror 9a provided in the same manner.

In this case, the specific reflected light that is reflected from the grain culm and enters the reflecting mirror 9a when the grain culm is in the appropriate position, and the specific reflected light that is reflected from the grain culm and enters the reflecting mirror 9a when the grain culm is in the shallow handling position or the deep handling position. reflected from the reflecting mirror 9a.
The angle of incidence of the specific reflected light incident on the reflecting mirror 9a is different as shown by the chain line and dotted line in FIG. 2, respectively.

Each of the reflected lights incident on the reflecting mirror 9a is reflected on the prism 9b at a reflection angle corresponding to the angle of incidence. In this case, a light beam corresponding to the reflection area of the reflecting mirror 9a is reflected by the prism 9b, but by making this light beam smaller than the light-receiving surface (slope) of the prism 9b, it can be directed to the position of the grain culm. The corresponding reflected light is sent to the prism 9b.
The reflected light incident on different positions with respect to the light receiving surface is refracted by the prism 9b to change its traveling direction and exit from the light receiving surface, The convex lens 9c and the concave lens 9d convert the parallel light beams into parallel light beams, which are separately irradiated onto the first to third photoelectric elements 10a, 10b, and 10c of the photoelectric element 10 in a divided state.

That is, the reflected light corresponding to the proper handling depth position of the grain culm is directed to the first photoelectric element 10a, and the reflected light corresponding to the shallow handling position is directed to the second photoelectric element 10b, which also corresponds to the deep handling position. The reflected light is irradiated onto each of the third photoelectric elements 10c.

Since the photoelectric element 10 outputs a voltage in proportion to the amount of light received, the second photoelectric element 1 as shown in FIG.
0b to the + side input terminal of the comparator 11, and the third
The photoelectric element 10c is connected to the + side input terminal of the comparator 12. Both comparators 11 and 12
has one input terminal connected to the power supply E, and each output terminal connected to each switching circuit 13, 14 of the solenoids SOL ₁ , SOL ₂ , and the switching circuits 13, 14 are connected by the outputs from the comparators 11, 12. Turn on the solenoids SOL ₁ , SOL ₂
The circuit is configured to close the connection circuit to the power source E.

In the figure, SW ₁ is a key switch, and SW ₂ is an automatic switch. This key switch SW ₁ is turned on when the combine harvester starts driving, and the automatic switch is activated.
SW ₂ is inserted manually when the grain handling depth is automatically adjusted.

As explained above, the present invention provides a combine harvester equipped with a handling depth adjustment device that adjusts the handling depth of grain culms in the threshing device, the grain culm being located on the grain culm conveyance path to the threshing device, an optical device that receives reflected light at different angles of incidence from the grain culm in the appropriate position and the grain culm in the shallow handling position and the deep handling position; By providing a plurality of photoelectric elements that receive light from the device and detecting the position of each grain culm, and by configuring the handling depth adjustment device to be controlled by output signals from these photoelectric elements, in other words, the combine harvester In order to detect whether or not the grain culm located on the grain culm transport path to the threshing device is suitable for the handling depth to be supplied to the threshing device, an optical device and a photoelectric element are used to detect whether or not the grain culm located on the grain culm transport path to the Appropriate, shallow treatment,
By utilizing the fact that the reflected light from the grain culms existing at each position to be treated is received by the optical device at different incident angles, the light emitted from the optical device is received in accordance with the different incident angles. The operating photoelectric element detects whether the grain culm at each position is at an appropriate handling depth, a shallow handling position, or a deep handling position, and the handling depth adjustment device is controlled based on the detection result. The apparatus is configured to detect the length of the grain culm supplied to the threshing device without contacting the grain culm.
Moreover, it can be done reliably.

Therefore, there is no fear that the conveyance posture of the grain culm will be disturbed when detecting the length of the grain culm, and the conveyance and supply of the grain culm to the threshing device can be carried out extremely smoothly. It can be done accurately without mistakes, and there is no fear that the grain culm will stagnate near the grain culm supply port of the threshing device.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a perspective view thereof, FIG. 2 is an exploded explanatory view of the main parts, and FIG.
The figure is an electrical circuit diagram. 3... Threshing device, 5... Vertical conveyance device (handling depth adjustment device), 9... Optical device, 9a... Reflector, 9b... Prism, 9c... Convex lens, 9d... Concave lens, 10...
Photoelectric element.

Claims (1)

[Claims] 1. In a combine harvester equipped with a handling depth adjustment device that adjusts the handling depth of grain culms in the threshing device, the grain culm is located on the grain culm conveyance path to the threshing device,
an optical device that receives reflected light at different angles of incidence from the grain culm in the appropriate position and the grain culm in the shallow handling position and the deep handling position; A grain culm characterized in that a plurality of photoelectric elements are provided to detect the position of each grain culm by receiving light from the apparatus, and the handling depth adjustment apparatus is controlled by output signals from these photoelectric elements. A combine harvester equipped with a handling depth adjustment device.