JPS6349158Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is such that a vertical conveyance chain of a reaping conveyance section that supplies grain culms to a feed chain of a threshing section is movably attached to the machine body, and a handling depth adjustment lever is attached to this vertical conveyance chain. By moving this adjustment lever, the receiving position of the grain culm supplied to the feed chain can be adjusted, and the handling depth of the grain culm relative to the handling cylinder can be adjusted. The handling depth detection device is configured to be able to engage and disengage from the screw conveyor rotated by a motor, and is arranged to detect the rotation of the forward/reverse motor so that the grain culm reaches the supply port at the front end of the threshing section. A handling depth adjustment device for a combine harvester, configured to automatically control the handling depth based on a handling depth detection result, and configured to automatically control the handling depth by engaging the adjustment lever with the screw conveyor. It is something.

In such an adjustment device that automatically controls the handling depth, a means for regulating the range of the handling depth is naturally required. Therefore, in the past, a limiter such as a micro switch was installed to detect the shallowest handling position and the deepest handling position, and the forward/reverse motor that rotates the screw conveyor was stopped via these limiters. It was. However, this type of conventional structure requires two relatively expensive micro-switches, and also requires an electrical circuit to stop the forward/reverse motor, resulting in an overall high cost. It was hot.

The purpose of the present invention is to eliminate such conventional drawbacks, and by focusing on the transfer force of the screw conveyor and effectively utilizing this transfer force, an extremely inexpensive and simple structure has been developed. Therefore, it is an object of the present invention to provide a handling depth adjustment device capable of regulating the shallowest handling position and the deepest handling position.

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

As shown in FIGS. 1 and 2, in front of a traveling machine body 2 equipped with a crawler-type traveling device 1, a reaping conveyance section A and a driving operation section B are arranged side by side in the left-right direction of the machine body,
A threshing section C and a waste straw discharging section D are arranged in that order in the longitudinal direction of the machine behind the reaping conveyance section A, and a paddy storage section E is provided behind the operation operation section B to perform two-row harvesting. Combine is configured.

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 tip conveyor 10 that locks and conveys the tip side of the harvested grain culm being conveyed, and after weeding the grain culm in the field, the grain culm is harvested while being pulled up, and the harvested grain culm is delivered to the supply port 11 side of the threshing section 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 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.

As shown in FIG. 3, 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.
A rod 18 is provided laterally protruding from the rod 18, and a bracket 19 protruding from the rod 18 is provided with a rod 18.
The lever 17 is pivotally connected to the lever 17 so as to be swingable about an axis perpendicular to the longitudinal axis of the lever 8 .

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.

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.

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 at the tip of the rod 25,
A pinch rail 26 in the vertical conveyance chain 9 is mounted and supported.

At two locations in the longitudinal direction of the inverted U-shaped rod 25, there are first and second holes constituting the handling depth detection device 27.
Sensors 28a, 28a are attached to detect the length of the grain culm supplied to the threshing section C, that is, the handling depth, by the vibration caused by contact with the grain culm conveyed along the guide cover 24. It is composed of

As shown in FIG. 4, signals from the first and second sensors 28a and 28b are input to a comparator 29, and based on the comparison result, two signals are interlocked with each other in a drive operation circuit 30 for the motor M.
A command signal is input to the drive operation circuit 32 of each switch 31, 31, and the switches 31, 31 are automatically operated to vertically drive and oscillate the vertical conveyance chain 9 and the tip conveyor 10, thereby clamping. The tips of the grain culms on the ear side that are being transported are the first and second sensors 2
The control device 23 is configured to automatically drive the motor M to be located between 8a and 28b 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 28a and 28b are oscillated, and on the other hand, the first and second sensors 28
A shallow handling condition is detected based on the fact that neither a nor 28b undergoes rocking displacement, and the second sensor 28
Based on the rocking displacement of only b, it is detected that the handling depth is maintained within an appropriate range.

A spring 33 is interposed between the adjustment lever 17 and the bracket 19, as shown in FIG.
The spring 33 allows the adjusting lever 17 to elastically engage the screw conveyor 20. Therefore, the adjustment lever 17 is reliably engaged with the screw conveyor 20, and good automatic control can always be achieved.
If an abnormal load occurs on the screw conveyor 20, the adjustment lever 17 will come off the screw conveyor 20 against the elastic force of the spring 33, thereby serving as a safety device and preventing secondary troubles from occurring. It is to prevent it from happening.

Above the screw conveyor 20, a fifth
As shown in the figure and FIG. 6, a guide plate 34 is provided to cover it, and this guide plate 34 is provided with a guide opening 35 through which the adjustment lever 17 is inserted. This opening 35 restricts the movement range of the adjustment lever 17.
Of this opening 35, the screw conveyor 20
At both ends in the direction along the
7 is an inclined surface 36, 36 having a relief angle θ inclined in a direction away from this screw conveyor 20.
is formed. Therefore, if the grain culm is extremely long or short, or if some kind of trouble occurs, the adjustment lever 17 that has been moved by the screw conveyor 20 will be moved to the inclined surface 3.
6, 36, this adjustment lever 17 is automatically removed from the screw conveyor 20, and the shallowest handling position and the deepest handling position of the grain culm can be determined without providing a special limiter. It will become. In this case, as described above, the adjustment lever 17
Since the screw conveyor 20 is elastically pressed by the spring 33, the inclined surfaces 36, 36
At this position, the adjustment lever 17 in contact with the screw conveyor 20 repeats the action of disengaging from the screw conveyor 20, re-engaging, and disengaging, and therefore generates a clicking sound at a rate of about once per second. This allows the pilot to sense the occurrence of an emergency situation without the need for a special warning system.

Note that 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, for example, only the vertical conveyance chain 9 is oscillated. Or, the center of the swing should be on the voice side of the aircraft.
Various known means can be employed.

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. It may also be something that is set up specifically.

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 mouth 11, or detecting the culm length from the reaping level with respect to the grain culm being raised by the lifting case 4. It is also possible to provide more than one, so that the setting of the appropriate range can be changed according to changes in the grain setting depending on the variety of the grain culm, etc.

As is clear from the above description, the handling depth adjustment device for a combine harvester according to the present invention has an adjustment lever inserted into a guide opening provided in a guide plate, and a screw conveyor installed at both ends of the guide opening. Since the adjustment lever is provided with an inclined surface that slopes in the direction in which the adjustment lever that has been engaged with the screw conveyor comes off, when the adjustment lever that has been engaged with the screw conveyor and has been moved comes into contact with the slope, the adjustment lever is automatically moved. This causes the screw to come off the screw conveyor. Therefore, as before,
The shallowest handling position and the deepest handling position can be determined with a simple structure of simply providing an opening with an inclined surface in the guide plate without requiring an expensive limiter such as a micro switch. As a result, the handling depth adjustment device itself has fewer failures and can be provided at a low cost.

[Brief explanation of the drawing]

The drawings illustrate the embodiment of the present invention, and FIG. 1 is a general schematic side view of the combine harvester, FIG. 2 is a schematic plan view of FIG. 1, FIG. 3 is an explanatory diagram of the main parts, and FIG. 4 is an automatic A schematic explanatory diagram of the control circuit, FIG. 5 is a sectional view for explaining the main part, and FIG. 6 is a plan view of FIG. 5. A... Reaping conveyance section, C... Threshing section, M... Forward and reverse rotation motor, 2... Machine body, 9... Vertical conveyance chain,
11... Supply port, 12... Feed chain, 1
4... Handling cylinder, 17... Handling depth adjustment lever, 20...
... Screw conveyor, 27 ... Handling depth detection device, 34 ... Guide plate, 35 ... Guide opening, 36 ... Inclined surface.

Claims (1)

[Scope of utility model registration request] A vertical conveyance chain 9 of a reaping conveyance section A that supplies grain culms to a feed chain 12 of a threshing section C is movably attached to the machine body 2, and a handling depth adjustment lever 17 is interlocked and connected to this vertical conveyance chain 9. By moving this adjustment lever 17, the receiving position of the grain culm supplied to the feed chain 12 can be adjusted, and the handling depth of the grain culm with respect to the handling cylinder 14 can be adjusted. The screw conveyor 20 rotated by a motor M is configured to be freely engageable and detachable, and the forward and reverse rotation motor M
The rotation of the grain culm is configured to be automatically controlled based on the handling depth detection result of a handling depth detection device 27 disposed at a location where the grain culm reaches the supply port 11 at the front end of the threshing section C,
Adjust the adjustment lever 17 to the screw conveyor 2.
In the handling depth adjustment device for a combine harvester configured to automatically control the handling depth adjustment by engaging with the By placing the adjustment lever 17 in the insertion position, the movement range of the adjustment lever 17 is restricted, and sloped surfaces 36, 36 are provided at both ends of the guide opening 35, and the adjustment lever 17 is provided on the sloped surfaces 36, 36. A handling depth adjustment device for a combine harvester, characterized in that the adjustment lever 17, which has been engaged with the screw conveyor 20, is disengaged from the screw conveyor 20 when the screw conveyor 20 comes into contact with the screw conveyor 20.