JPH0119639Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention moves the vertical conveyor by manual lever operation, changes the receiving position of the grain culm supplied to the feed chain, and increases the handling depth. In addition to adjusting the handling depth, a screw conveyor driven by a forward/reverse motor is installed, and a lever is locked to the screw conveyor, and the handling depth is 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 combine harvester that can be adjusted automatically.

(Prior art and its problems) In such a combine harvester handling depth adjustment device, a spiral plate 50 as shown in FIG. 8 is conventionally used as a screw conveyor. Because of the contact with the edge 52, there is a drawback that noise is generated and a lot of wear occurs during sliding operation. The present invention solves such conventional drawbacks, and also provides a handling depth adjustment device for a combine harvester that can protect the mechanism by buffering the load impact applied to the handling depth adjustment mechanism, and can be manufactured easily and inexpensively. is intended to provide.

(Means for Solving the Problems) In order to achieve the above object, the handling depth adjustment device of the combine harvester of the present invention has a vertical conveying device that supplies grain culm to the feed chain of the threshing section movably attached to the machine body. A manually operated adjustment lever is interlocked and connected to the vertical conveyance device, and by operating the lever, the receiving position of the grain culm supplied to the feed chain can be adjusted, thereby freely adjusting the handling depth of the grain culm with respect to the handling cylinder. A screw conveyor is provided which allows the lever to be freely engaged and detached, and a forward/reverse drive motor is interlocked with the screw conveyor, and when the lever is locked to the screw conveyor, detection by a sensor is performed. A handling depth adjustment device for a combine, which is provided with a control device that automatically drives and rotates the motor so as to maintain the handling depth within a set range, in which the screw conveyor is wound in a helical manner and has a longitudinal section. It is constructed from a wire rod with a circular surface.

(Function) By operating the lever while detached from the screw conveyor, the vertical conveyance device can be artificially displaced and the handling depth can be manually adjusted. On the other hand, by locking the lever to the screw conveyor, the lever is swung to displace the vertical conveyance device in accordance with the forward and reverse rotation of the motor based on the control device.
Automatic handling depth adjustment is possible.

During this automatic adjustment, the mutual sliding surfaces of the screw conveyor and the lever that engages with it are not contact points between edges and surfaces as in the past, but contact points between circles. The contact is very smooth, allowing for smooth locking and guidance.

Further, the screw conveyor is made of a wire rod wound in a spiral shape and having a circular longitudinal section, and its flexibility in the axial direction and the direction perpendicular thereto is greatly improved.

(Example) Next, an example of the present invention will be described 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 provided upwardly rearward adjacent to the rear end of the lower conveyance chain 8, and both chains 8,
An ear tip conveying body 1 is provided above 9 and holds and conveys the ear side of the harvested grain culm which is conveyed while holding the plant head.
The machine consists of 0, and after weeding the grain culms in the field, it is harvested while being pulled up, and the machine is transported upward to the rear so that the harvested grain culms are directed toward the supply port 11 side of the threshing section C, and the machine is laid down on its side. It is configured to be changed and passed on to the feed chain 12.

The threshing section C is provided with a feed chain 12 and a clamping rod 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 support frame 15 so as to be able to swing freely around the horizontal axis, and as the vertical conveyance chain 9 swings, the position where the vertical conveyance chain 9 holds the grain culm from the lower conveyance chain 8, and , 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 able to swing freely in the longitudinal direction of the machine. The lever 17 is pivotally connected to a protruding bracket 19 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 so as to be freely driven and rotated by a forward/reverse drive motor M while facing the longitudinal direction of the machine.
A coil spring 22, such as a commercially available coil spring 22, is wound spirally and has a circular vertical cross section, and the pitch of the coil spring 22 is fixed to the rotating shaft 21, which is connected to the lever. The diameter of the lever 17 is larger than that of the coil spring 17, and the lever 17 is configured to be able to engage and disengage from the coil spring 22 by swinging the lever 17 relative to the bracket 19. In the figure, reference numeral 19a denotes a coiled spring that urges the lever 17 to swing toward the side where it engages with the coil spring 22. 36 is a tension spring.

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 fixedly locked.

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

First and second sensors 27 and 28 are attached to two locations in the middle of the U-shaped rod 25 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;
A shallow handling condition is detected based on the fact that none of the sensors 28 undergoes rocking displacement, and it is determined that the handling depth is maintained within an appropriate range based on the fact that only the second sensor 28 is rockingly displaced. It detects it.

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.

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.

(Effects of the invention) Since the present invention has the above-described configuration, it has the following effects.

Since the screw conveyor is made of a spirally wound wire rod, the degree of deflection in the axial direction or in a direction perpendicular thereto is much greater than that of a conventional screw conveyor made of a spiral plate. On the other hand, the position of the vertical conveyance device is fixed by this screw conveyor.

Therefore, if this vertical conveyor collides with something else in the field, the impact will naturally be transmitted to the lever and screw conveyor, and if it is a conventional one,
Because the engagement between the two is a rigid engagement, they are damaged and deformed, but in the case of the present invention, compared to the past, the engagement is very soft, that is, it is easy to bend. As a result, the impact caused by collisions with this vertical conveyor is very softly absorbed, resulting in less damage to the screw conveyor and lever, resulting in highly accurate and It has the advantage of making it easy to maintain ideal handling depth adjustment.

Since the screw conveyor and the lever are in circle-to-circle contact, the locking and guiding of the lever by the screw conveyor is smooth, so compared to the conventional spiral plate, less noise is generated during sliding operation. Also, wear was drastically reduced.

It has a simpler structure than a conventional spiral plate, can be implemented using a commercially available coil spring, and can be manufactured at low cost.

[Brief explanation of the drawing]

Fig. 1 is an overall side view of a combine harvester that is an embodiment of the present invention, Fig. 2 is an overall plan view of the same, Fig. 3 is a plan view of the main parts of the above, and Fig. 4 shows a handling depth detection sensor. 5 is a side view of the screw conveyor section, FIG. 6 is a view taken along the - line in FIG. 5, and FIG. 7 is a diagram for explaining the effects of the present invention. FIG. 8 is a perspective view showing a conventional example. C... Threshing section, M... Forward/reverse drive motor, 9.
DESCRIPTION OF SYMBOLS 10... Vertical conveyance device, 12... Feed chain, 14... Handling cylinder, 17... Adjustment lever, 22...
...wire rod, 27,28...sensor.

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/reverse drive motor is interlocked with 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 device for adjusting the handling depth of a combine, the screw conveyor is provided with a control device that automatically drives and rotates the motor so that the screw conveyor is maintained within the depth of the combine harvester. A handling depth adjustment device for a combine harvester, characterized in that: