JPS6227768B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sensor structure for a grain culm feed regulation device in a combine harvester.

As conventional techniques, there are ones in which the sensor is made of an elastic body and arranged in a suspended manner as in Utility Model Application Publication No. 49-122065, or in which the sensor is placed in contact with the tip of the grain culm tip as in Japanese Patent Application Publication No. 49-41113. The former had the disadvantage that when the sensor detected irregularities on the tip side of the grain culm, the switch was turned on and off depending on the grain culm, causing a hunting phenomenon in the feed adjustment device. In addition, the latter method determines the position of the tip of the grain culm by arranging a sensor at the tip of the grain culm, that is, parallel to the conveyance direction of the grain culm. It could not be smoothed and could only correspond to the flow of the grain culm.

Therefore, the present invention is configured such that the feed conveyor body that inherits and supplies the culm side of the grain culm to the feed chain of the threshing device can be moved and adjusted by operating a switch, so that the feeding depth can be adjusted to a constant value depending on the length of the culm. In the combine harvester, the operation sensor S of the switch, which is in contact with the tip side of the grain culm supplied to the supply port of the threshing device, is installed vertically so as to be substantially perpendicular to the conveying direction of the grain culm, and the lower end portion of the sensor S is installed vertically. A curved lower part _S1 is formed that curves toward the rear, and the curved lower part of the sensor is designed to contact and follow the surface layer on the tip side of the grain culm, thereby smoothing out the unevenness of the surface layer on the tip side of the grain culm being fed and conveyed. This device is designed to prevent the occurrence of hunting phenomenon in the supply adjustment device and to perform stable supply adjustment.

Next, the embodiment shown in the drawings will be described.

Fig. 1 shows a plan view of a combine harvester, in which 2 is a crawler-type traveling body, C is a reaping conveyance part, D is a threshing device, d is a feed chain, 3 is a culm, 4 is a steering part, 5 is an engine part, 6 is a paddy receiving part, 7 is a straw removal chain, and 8 is a cutter.

The reaping conveyance section C has a multi-row mowing structure, and when the grain culms to be reaped by being pulled up by each pulling device 9 are transferred backward through conveyance paths 10, 10, they are transferred to a horizontal conveyance path 11.
The culm side of the grain culm is held between the supply conveyance body A of the chain and the clamping rod 12 and conveyed in a lifted state, and is handed over and supplied to the feed chain from the terminal end a, and the head side is conveyed to the conveyance tine 13. The grain is then dropped onto the supply plate 1' while being conveyed, and is supplied as it is to the supply port 1 of the threshing device D, where it is threshed by the handling cylinder 14 and the handling teeth 14'.

In FIG. 3, P is a hydraulic pump, which is configured to communicate with the cylinder 15 via an electromagnetic switching valve V. The switching valve V has a three-position switching structure, with left and right solenoids SOL equipped with springs.
1, Can be switched by SOL2, cylinder 15
A piston rod 16 extending from the piston rod 16 is continuously struck against a support 18 rotating with one end as a fulcrum 17, and the other end of the support 18 is connected to the lower part of the supply carrier A, so that the upper side of the supply carrier A is connected. Freely rotating support 1
When the solenoid SOL1 is activated, the piston rod 16 is supported by the switching operation of the switching valve V.
is hydraulically operated in the direction of arrow A, and the terminal end a of the supply carrier A moves in the direction of arrow B, that is, in the direction approaching the feed chain d side, and the solenoid
When the SOL2 is operated, the terminal end a moves in the direction of the reverse arrow B, that is, in the direction away from the front of the feed chain d.

In addition, a grain side switch L that is operated by contacting the culm side of the grain culm is attached to a part of the supply conveying body A that is a little away from the terminal end a, and an upper part in front of the supply port 1 above the supply plate 1' is installed. A front switch H and a front switch M that are in contact with the ear tip are placed at a certain distance from each other with respect to the feed chain d side, and sensors S and S are placed downward from both switches H and M to the grain culm. The switches L and M are normally open, and the switch M is normally closed.
The electric circuit shown in the figure is configured to be activated when the main switch 20 is turned on.

In both the switches H and M, operating pieces 21 are extended below the switches H and M so as to have a receding angle with respect to the direction of movement of the tip side, and the switches are operated by vertical movement of the operating pieces 21. The upper part 22 of the strip-shaped sensor S is bent forward and joined to the lower surface of the actuating piece 21.
3, and a curved lower part S1 is formed at the lower part of the sensor S, the lower end of which is curved toward the rear.

When the main switch 20 is turned on during combine harvester operation, the culm side of the grain culm being harvested and transported in the reaping transport section C is held between the supply transport body A and the clamping rod 12 and lifted up. When the grain culm is conveyed in the direction of arrow C as shown in FIG. By the way, when the culm side of the grain culm being transferred in the direction of the arrow C contacts the sensor S of the front switch M and further contacts the switch L, both switches L and M are closed and the solenoid is activated, as shown in Fig. 4. When SOL1 is activated, the terminal end a of the feed conveyor A moves in the direction of arrow B, and the culm side of the grain culm that is to be supplied from the terminal end a to the feed chain d is handed over so that it is fed deeply. , the supply condition is a moderately constant supply depth.

Furthermore, if the grain culm being conveyed in the direction of arrow C is a long culm, the leading tip side contacts the sensor S of the forward switch H, and as shown in FIG.
is closed, solenoid SOL2 is activated, and the terminal end a of the supply carrier A is to move in the direction of the reverse arrow B. When the culm actuates switch L, the movement stops, and the culm side The state of being moved in the direction of the reverse arrow B is taken over by the feed chain d, and its feeding state has a moderately constant feeding depth.

In such a state that the tip side contacts the sensors S and S and activates the switches H and M, when the tip side is moved in the moving direction D, it contacts the curved lower part S1 of the sensor S and moves the sensor S in that direction. Even when pressed, sensor S tilts to activate the switch,
The tip side can continue to move in the moving direction along the curved lower surface of the curved lower part S1 as if escaping, or even if the tip side moves while pushing the sensor S in the direction of arrow H in this moving state. The switch operation by the sensor S is performed, and the tip side can continue to move while sliding along the curved lower surface of the curved lower portion S1.

In addition, when the amount on the tip side (the thickness of the grain culm layer) approximates the minimum amount required to operate the switches H and M of the sensors S and S, in other words, the amount of rotation of the sensors S and S is Switches H and M are turned on and off.
Even if there is a locally large unevenness in the surface layer of the grain culm on the ear side, the curved lower part S1 always remains on the curved lower surface for only the time required for it to pass through the curved lower part S1. By contacting and following the top of the grain culm surface layer in the area, the switch operation of sensors S and S can be maintained in the ON and OFF states, allowing stable supply adjustment without hunting.

In this way, the present invention makes it possible to freely adjust the movement of the supply carrier A that inherits and supplies the culm side of the grain culm to the feed chain d of the threshing device D by operating a switch, and adjusts the supply depth to a constant value depending on the length of the culm. In the combine harvester configured to allow this, an actuation sensor S of the switch, which contacts the tip side of the grain culm supplied to the supply port of the threshing device D, is installed vertically so as to be substantially orthogonal to the conveying direction of the grain culm. The lower part is formed with a curved lower part _S1 whose lower end curves backward, and the curved lower part of the sensor is designed to contact and follow the surface layer on the grain culm tip side, so that the grain culm surface layer on the grain culm tip side is formed. Even if there is a locally large unevenness on the surface, the sensor S can be switched from ON to OFF by contacting and following the top of the grain culm surface layer for only the time required for it to pass through the curved lower part S1. hold in
Unevenness can be detected as having been smoothed, making stable supply adjustment possible while preventing the hunting phenomenon of the supply adjustment device. In addition, even if the tip of the grain culm slightly changes in the conveying direction, the sensor S can be reliably activated while being guided by the surface of the curved lower part S1 facing backward, and it can continue to move smoothly without getting caught. Has characteristics.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and Fig. 1 is a plan view of the combine, Fig. 2 is a side view thereof, Fig. 3 is a layout diagram of each part to explain the arrangement and operation, and Fig. 4 is a circuit diagram. , FIG. 5 is a side view of the main part, and FIG. 6 is a front view thereof. D... Threshing device, 1... Supply port, 2... Traveling body, C... Reaping conveyance section, d... Feed chain,
3...找扼杆、S...Sensor、S1...Curved lower part.

Claims (1)

[Claims] 1. A combine harvester configured so that the feed conveyor A that inherits and supplies the culm side of the grain culm to the feed chain d of the threshing device D is movable and adjustable by operating a switch, so that the supply depth can be adjusted to a constant level depending on the length of the culm. , an actuation sensor S of the switch that contacts the tip side of the grain culm supplied to the supply port of the threshing device D is installed vertically so as to be substantially perpendicular to the conveyance direction of the grain culm, and a lower end portion of the sensor S is provided at a lower part of the sensor S. A sensor structure for a grain culm supply adjustment device in which a curved lower part _S1 is formed that curves toward the rear, and the curved lower part of the sensor contacts and follows the surface layer on the tip side of the grain culm.