JPS6349160Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention not only moves the vertical conveying device by manually operating a lever and changes the receiving position of the grain culm supplied to the feed chain to adjust the handling depth, but also A screw conveyor driven by a forward/reverse motor is installed, and a lever is locked to the screw conveyor, so that the handling depth can be automatically adjusted by driving the motor based on the handling depth detected by the sensor. This invention relates to a handling depth adjustment device for a combined harvester.

In conventional devices of this type, the lever is simply locked to the screw conveyor, and when the screw conveyor is rotated in the forward or reverse direction, a pressing force is applied to the lever from the helical body. , a pressing force is applied to the lever at the position where the helical body rotates away from the rotation axis, and the helical body displaces the lever to the side away from the screw conveyor. Even if the lever is biased to be displaced toward the screw conveyor, there is a drawback that the lever tends to separate downward from the screw conveyor.

In view of the above points, the present invention has been developed to rationally lock the lever to the screw conveyor, and to reduce the force to lock the lever to the screw conveyor by applying the pressing force from the helical body itself. grant,
It is an object of the present invention to reliably prevent unexpected detachment of a lever due to application of pressing force.

Next, embodiments of the present invention will be explained based on the drawings.

In front of a traveling machine body 2 equipped with a crawler-type traveling device 1, a reaping transport section A and a driving operation section B are arranged side by side in the left-right direction of the machine, and behind the reaping transport section A, a threshing section C and a straw discharge section D are installed. and are arranged side by side in that order in the longitudinal direction of the machine body, and on the other hand, a paddy storage section E is provided behind the operation section B, forming a two-row harvesting combine.

The reaping conveyance unit A includes a pair of lifting cases 4, 4 provided behind the grass division bodies 3, 3 at both left and right ends, a cutting blade 5 provided below the lifting cases 4, 4,
Star wheels 6, 6 for raking in grain culms provided above the cutting blade 5, raking belts 7, 7 for merging two rows of reaped grain culms, and pinching and conveying the base of the merged reaped grain culms. , a lower conveyance chain 8, a vertical conveyance chain 9 which is provided adjacent to the rear end of the lower conveyance chain 8 and raised rearward, and a vertical conveyance chain 9 which is provided above both chains 8 and 9 and which holds the stock base between them. It is composed of an ear conveyor 10 that locks and conveys the ear side of the harvested grain culm being transported, and after weeding the grain culm in the field, it is harvested while being pulled up, and the harvested grain culm is delivered to the supply port 11 side of the threshing machine C. The feed chain 12 is configured to transfer the feed toward the rear and upper side of the machine while changing the posture to lie down on its side.

The threshing section C has a feed chain 12 and a clamping culm 13 for the feed chain 12 on one side, and has a handling barrel 14 mounted behind the feed port 11 so as to be freely driven and rotatable around the axis in the longitudinal direction of the machine. It is composed of

The vertical conveyance chain 9 and the tip conveyor 10 are
The rear end side is attached to the reaping part branch frame 15 so as to be able to swing freely around the horizontal axis, and as the vertical conveyance chain 9 swings, the vertical conveyance chain 9 will clamp the grain culm from the lower conveyance chain 8; In addition, the gripping position of the grain culm from the vertical conveyance chain 9 by the feed chain 12 is changed, and the handling cylinder 1
The handling depth of the grain culms supplied to the grain culm 4 is configured to be adjusted.

A handling depth adjustment lever 17 for manual operation is provided near the operation control section B so as to be swingable in the longitudinal direction of the machine, and a rod 18 is provided laterally protruding from the vertical conveyance chain 9. The lever 17 is pivotally connected to a bracket 19 protruding from the rod 18 so as to be swingable about an axis perpendicular to the longitudinal axis of the rod 18.

A screw conveyor 20 is provided near the operation control section B, facing the front-rear direction of the machine, and is rotatably driven by a forward/reverse electric motor M, and the screw conveyor 20 is operatively connected to the motor M. A coil spring 22 is externally fitted onto a rotating shaft 21, and the coil spring 22
The pitch of the lever 17 is larger than the diameter of the lever 17, so that the lever 17 can be engaged with and disengaged from the coil spring 22 by swinging the lever 17 relative to the bracket 19. Although not shown, a coiled spring is provided between the bracket 19 and the lever 17, and is biased to swing the lever 17 toward the side where it engages with the coil spring 22.

With the above configuration, by swinging the lever 17 in the direction along the rotating shaft 21 in a state where it is detached from the coil spring 22, the vertical conveyance chain 9 and the tip conveyor 10 are artificially oscillated and manually operated. The handling depth can be adjusted. On the other hand, by locking the lever 17 to the coil spring 22, the lever 17, that is, the vertical conveyance chain 9 and The handling depth can be automatically adjusted by driving and oscillating the tip conveyor 10. In addition, when the motor M is stopped by cutting off the power, the coil spring 22 is used to prevent the lever 17 from being operated manually.
can be fixed and locked.

A grain culm conveyance guide cover 24 is provided above the ear tip conveyor 10, and an inverted U-shaped culm body 25 is provided detouring above the grain culm conveyance guide cover 24, and the vertical conveyance chain 9 is provided at the tip of the culm body 25. Rail 2
6 is mounted and supported.

First and second sensors 27 and 28 are attached to two locations midway in the longitudinal direction of the U-shaped culm body 25, and the sensors 27 and 28 are attached to the U-shaped culm body 25 at two locations midway in the longitudinal direction. , is configured to detect the length of the grain culm supplied to the threshing section C, that is, the handling depth.

Signals from the first and second sensors 27, 28 are inputted to the controller 29, and based on the results, the drive operation circuits for the two switches 31, 31 are operated in conjunction with each other in the drive operation circuit 30 for the motor M. Input the command signal to 32, and switch 3
1 and 31 are automatically switched to vertically drive and oscillate the vertical conveyance chain 9 and the ear tip conveyor 10, whereby the tip of the ear side of the grain culm being pinched and conveyed is placed in the first position.
The control device 23 is configured to automatically drive the motor M so as to be positioned between the first and second sensors 27 and 28 to maintain the handling depth within a set range.

That is, the deep handling condition is detected based on the fact that both the first and second sensors 27 and 28 are oscillated, and on the other hand, the first and second sensors 27 and 2
A shallow handling condition is detected based on the fact that none of the second sensors 8 undergo rocking displacement, and the handling depth is maintained within an appropriate range based on the fact that only the second sensor 28 is rockingly displaced. It detects.

Above the screw conveyor 20 is a cover 3.
3, and a lever 17 projects upward from a guide groove 34 formed in the cover 33.

Friction plates 36, 36 and a compression spring 37 for pressing the arm 35 are provided between the arm 35 that integrally supports the vertical conveyance chain 9 and the tip conveyor 10 and the reaping part support frame 15. A friction holding mechanism 38 is configured, and the arm 35 can be swung relative to the reaping part support frame 15 against the biasing force of the spring 37 by applying a pressing force from the screw conveyor 20 or by artificial force. However, in other cases, the arm 35 is frictionally fixed by the biasing force of the spring 37 to maintain its posture.

In order to lock the lever 17 to the screw conveyor 20, as shown in FIG. It is inserted at an angle (θ ₂ in the figure) that is gentler than the angle (θ ₁ in the figure).

Therefore, when moving the lever 17 to the shallow handling side, as shown in FIG. 7, as the conveyor 20 rotates, the upper half of the helical portion 22a moves toward the rotation axis. Lever 17 at X
On the other hand, when moving the lever 17 to the deep handling side, as shown in FIG. and conveyor 2
In both the forward and reverse rotations of 0, the lever 17 can be displaced toward the shallow handling side or the deep handling side while applying a pressing force to the side that brings the lever 17 closer to the rotation axis by the rotational force itself.

The means for adjusting the handling depth is not limited to the structure in which the vertical conveyance chain 9 and the tip conveyor 10 are integrally oscillated as described above, but it is also possible to oscillate only the vertical conveyance chain 9, for example. or
Further, various known means such as setting the center of swing to the front side of the machine body can be adopted, and these are collectively referred to as vertical conveyance devices 9 and 10.

The screw conveyor 20 has the advantage that it can be constructed at a low cost by externally fitting and fixing the coil spring 22 to the rotating shaft 21 as described above. The helical body 22 may be provided as a helical body 22.

The means for detecting the handling depth of grain culms is not limited to the above-mentioned contact type sensor, but may also be a non-contact type sensor such as a light wave sensor. Various modifications are possible, such as installing it near the supply port 11, or detecting the culm length from the reaping level with respect to the grain culm being raised by the raising case 4. Three or more may be provided so that the setting of the appropriate range can be changed in accordance with changes in grain setting depending on the variety of grain culms, etc.

As explained above, in the combine harvester adjustment device of the present invention, the movement of the vertical conveyance device relative to the machine body during automatic handling depth adjustment is achieved by applying pressing force to the lever from either one of the adjacent helical body parts. In addition, the insertion position of the lever between adjacent helical body parts is made to be more gentle than the angle of inclination of the helical body parts with respect to the rotation axis, so that regardless of whether it is in the forward or reverse direction, In the helical body part, a pressing force can be applied to the lever at the point where it rotates toward the rotation axis,
The friction force between the lever and the lever due to the application of the pressing force can be used to constantly apply the pressing force to displace the lever to the side where it is locked to the screw conveyor. Not only can the lever be prevented from accidentally separating from the screw conveyor, but conversely, the lever can be more securely locked to the screw conveyor by applying pressing force.
Automatic handling depth adjustment has become possible.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, in which Figure 1 is an overall side view of the combine, Figure 2 is an overall plan view, and Figure 3 is an overall side view of the combine harvester.
The figure is a plan view of the main part, Fig. 4 is a rear view of the main part showing the handling depth detection sensor, Fig. 5 is a side view of the screw conveyor section, and Fig. 6 is a view taken along the - line in Fig. 5. , FIG. 7 is a view taken along the arrow in FIG. 5 with the - line partially omitted;
FIG. 8 is a partially omitted view taken along the - line in FIG. 5. C... Threshing section, M... Forward/reverse electric motor, 2...
... Airframe, 9, 10 ... Vertical conveyance device, 12 ... Feed chain, 14 ... Handling barrel, 17 ... Adjustment lever, 20 ... Screw conveyor, 22 ... Spiral body, 23 ... Control device, 27, 28...sensor, 38...friction retention mechanism.

Claims (1)

[Scope of utility model registration request] A vertical conveyance device for supplying grain to the feed chain of the threshing section is movably attached to the machine body, a manual operation adjustment lever is interlocked and connected to the vertical conveyance device, and grain culm is supplied to the feed chain by operating the lever. The handling depth of the grain culm with respect to the handling barrel can be freely adjusted by adjusting the inheritance position of the grain culm, and
A screw conveyor is provided that allows the lever to be freely engaged and detached, and a forward and reverse electric motor is interlocked and connected to the screw conveyor, and when the lever is locked to the screw conveyor, the handling depth detected by the sensor is set within a set range. In the combine harvester handling depth adjusting device, which is provided with a control device that automatically drives and rotates the motor so as to maintain the screw conveyor within the range of 100 to 200 m, the height of the screw conveyor is 1. A handling depth adjustment device for a combine harvester, characterized in that the operating lever is fitted in a state where the operating lever is inclined at an angle gentler than the inclination angle of the helical body portion with respect to the rotation axis in almost the entire range of automatic handling depth adjustment range. .