JPS6312681Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is a combine harvester configured to stabilize the handling depth by automatically operating the handling depth adjustment mechanism using a drive mechanism that is automatically activated based on the culm length detection result. The present invention relates to a height adjustment device.

The above-mentioned combine harvester handling depth adjustment device is designed to save labor by automating the handling depth adjustment, but there are two demands as described below. In other words, there is a desire to display the actual automatic handling depth adjustment status so that the operator can accurately recognize whether automatic handling depth adjustment is being performed as desired without any trouble, and a desire to display the actual automatic handling depth adjustment status. There is a desire to be able to switch to a state where the handling depth can be adjusted manually in the event of damage.

As a conventional technique that satisfies these two demands, for example, a grain culm supply regulating device described in Japanese Utility Model Application Publication No. 53-63427 is known. This device engages the lever for manually operating the handling depth adjustment mechanism with the teeth of a gear that is rotatably supported by the swinging shaft of this lever and rotated by a motor that is the drive mechanism. This is what I did. Therefore, when adjusting the handling depth using the drive mechanism, the manually operated lever can also be used as a handling depth indicator by transmitting the driving force through the lever, and when manually operated, the lever and the gear When the operation is completed, the lever is re-engaged with the teeth of the corresponding gear, and the lever is held in position by stopping the motor.

The problem to be solved by the present invention relates to the overall structure of the combine harvester. That is, the mainstream of combine harvesters in recent years is one in which a pre-harvest processing section is connected to the front part of the machine equipped with a crawler traveling device, a threshing device, etc. via a support frame so as to be able to swing vertically. For this reason, the point of reaction force when adjusting the handling depth is often the support frame, and in the prior art described above, the gear is attached to a part of the support frame that is difficult to see from the control section, or A structure is adopted in which a stay extends from the support frame and supports the gear. However, in the former configuration, it is difficult for the operator to see the gear, and when locking the lever to the teeth of the gear, the operator must engage the teeth by hand, relying on the sensation he receives from the lever. Moreover, in the latter configuration, it was necessary to extend a sturdy stay close to the control section that can withstand the weight of the handling depth adjustment mechanism and the reaction force of the handling depth adjustment. The present invention aims to provide a combine harvester handling depth adjustment device that satisfies the above two demands, has a simple lever locking operation during manual operation, and does not require a long support stay as in the past. purpose.

The structural feature of the present invention devised to solve the problem is that a mechanism is provided between the drive mechanism and the handling depth adjustment mechanism to disconnect and disconnect the connection between the two; A control lever for manually operating the lever is interlocked and connected, and a lever guide frame is provided in the control section of the combine, which is provided with locking grooves for locking the lever at appropriate intervals in the direction of adjusting the handling depth of the lever.
The lever guide frame is configured to be able to change its posture between a posture in which the lever can be locked and held and a posture in which it cannot be locked and held.

With this characteristic configuration, the present invention not only enables display of automatic handling depth adjustment and manual operation to deal with failures of the drive mechanism, etc. with a simple configuration, but also provides the following effects. It will be done. That is,
By changing the posture of the lever guide frame installed in the control section,
The lever is held locked during manual operation, and the locking action is released during automatic handling depth adjustment, making it easy to lock the lever and eliminating the need for a long support stay as in the past. . In other words, the manually operated lever is pivotally supported on the pre-processing section support frame of the combine, which is inherently sturdy, and has a sturdy structure that can withstand the reaction force of handling depth adjustment. Holding has the advantage that it can be operated reliably while visually confirming the locking groove.

Hereinafter, embodiments of the present invention will be described based on the drawings.

Figure 1 shows the side view of a combine harvester, which is equipped with a crawler traveling device 1, a threshing device 2, etc., and a frame 3 that also serves as a transmission case that can be freely adjusted in vertical swing to raise planted stem culms. A device 4, a reaping device 5 that cuts the base of the raised stem culm, and a rear conveyance device that conveys the cut stem culm in an upright position rearward and upward, and then changes it to a sideways posture and transfers it to the threshing feed chain 6. A reaping processing section consisting of a device 7 and the like is connected and equipped.

Then, as the plant progresses, the planted stem culms are raised and harvested, and the harvested stem culms are sequentially handled and processed.

Next, the handling depth adjusting device will be explained based on FIGS. 2 to 7 A and B.

The rear conveyance device 7 swings up and down around a fulcrum P near the terminal end to change the support position of the reaped culm in the culm length direction, thereby reducing the amount of the culm tip inserted into the threshing device 2. Configured with a changing handling depth adjustment mechanism.

A swinging arm 8 is rotatably supported on the frame 3 via a mounting bracket 3a around a horizontal axis _X1 , and the free end of the arm 8 and the rear conveyance device 7 are connected to the rod 9. They are interlocked and connected via.

A case 10 is pivotally supported on the frame 3 so as to be able to freely swing around a horizontal axis _X2 , and a screw shaft 11 is rotatably supported on the case 10, and this screw shaft 11 is connected to an electric motor that can rotate in forward and reverse directions. 12 through a worm reduction mechanism.

A piece member 13 is screwed onto the screw shaft 11, and a connecting pin 14 which is freely rotatably supported on the swing arm 8 so as to be insertable and removable, and the piece member 13 are separably connected using a bolt 15. This structure constitutes a mechanism 16 that connects and disconnects the electric motor 12 and the rear transport device 7.

As shown in FIG. 1, on the back of the pulling device 4, swing sensors 17a are attached which are lifted at appropriate intervals in the vertical direction and pressed against the stem culm, and
The sensor 17a... is attached to the base of each sensor 17a...
A switch box 17b... equipped with an electric switch for detecting the rocking of... is provided, and the culm length is divided into multiple stages based on which sensor 17a... is pressed from the bottom to the top. A culm length detection device 17 is configured to detect and extract this as an electric signal.

a mounting bracket 3 fixed to the frame 3;
A sliding contact type electric switch mechanism 18 for controlling the operation of the electric motor 12 is attached to a. Although not illustrated, this switch mechanism 18 has a fixed contact and a movable contact that are connected to the culm length detection mechanism 17, and a swing operating arm 18a of the movable contact connects the swing arm 8 and the rod 19. The swinging position of the swinging arm 8 corresponding to the culm length detection result, that is, the swinging position of the rear conveyance device 7, becomes a preset position corresponding to the culm length. Thus, the electric motor 12 is configured to operate in forward or reverse rotation based on the culm length detection result.

A bracket 3a fixed to the frame 3,
A swing operating lever 20 is pivotally supported to be rotatable about the same axis _X1 as the swing arm 8 and movable in the axial direction, and the lever 20 and the swing arm 8 are connected via a pin 21. They are interlocked so that they cannot rotate relative to each other. Further, a spring 22 is provided which urges the lever 20 to return to a predetermined position where it comes into contact with the swing arm 8.

A guide frame 24 of the lever 20 is bolted to a pair of front and rear support frames 23, 23 that are connected to the frame 3. The guide frame 24 has a long groove 25 for swinging the lever, which allows the operating lever 20 to move back and forth after being moved away from the swing arm 8 against the elastic biasing force, and a long groove 25 for swinging the lever, which is elastically returned to a predetermined position. A plurality of locking grooves 26 for locking and holding the lever 20 are formed at appropriate intervals in the front-back direction, and the supporting frames 23, 2 are turned upside down.
3, the lever 20, which is elastically returned, can be locked and held in the locking grooves 26 (see FIG. 7A) and the locking grooves 26 are connected to the lever 20.
It is configured so that the posture can be changed from the elastic return position to a posture in which it can be locked and held (see FIG. 7B).

The handling depth adjustment device is configured as described above, and when the guide frame 24 is switched to a posture in which it cannot be held and the connection/disconnection mechanism 16 is connected, the handling depth adjustment device is configured as described above. The rear conveyance device 7 is automatically operated by the automatically operated electric motor 12 to stabilize the handling depth. At this time, the actual operating state of the automatic handling depth adjustment is accurately displayed by the swinging displacement of the lever 20, and the operator can adjust the automatic handling depth by monitoring the lever 20. This means that the actual operating state of the system can be accurately recognized.

Also, contrary to the above, if the guide frame 24 is switched to a position where it can be locked and held, and the connection/disconnection mechanism 16 is set to the disconnected state, the rear conveyance device 7 can be operated using the lever 20, and, Push the lever 20 at the desired position.
The handling depth can be adjusted to lock and hold the handle.

In addition, when implementing this proposal, the guide frame 24 should be moved forward and backward.
It may be carried out by inverting it 180 degrees to switch between a posture that can be locked and held and a posture that cannot be held, but if the front and back are reversed as in the embodiment, the guide frame 2
Marks for reading the position of the lever 20 can be separately attached to the front and back surfaces of the lever 20, which has the advantage of making it easier to read the marks.

Note that although reference numerals are written in the claims section of the utility model registration for convenience of comparison with the drawings, the present invention is not limited to the structure of the attached drawings by such entry.

[Brief explanation of the drawing]

The drawings show an embodiment of the handle depth adjustment device for a combine harvester according to the present invention, FIG. 1 is a side view of the combine, FIG. 2 is a side view showing the swing operation structure of the rear conveyance device, and FIG. 3 is a swing Figure 4 is a vertical front view of the same structure; Figure 5 is a vertical front view of the lever mounting section; Figure 6 is a swing arm and electric switch mechanism. FIG. 7A and FIG. 7B are plan views of the guide frame. 7... Handling depth adjustment device, 12... Drive mechanism, 1
6... Connection/disconnection mechanism, 20... Lever, 24...
Guide frame, 26...locking groove.

Claims (1)

[Claims for Utility Model Registration] 1. The handling depth of a combine harvester configured to stabilize the handling depth by automatically operating the handling depth adjustment mechanism 7 using the drive mechanism 12 that is automatically activated based on the culm length detection result. the drive mechanism 12;
A mechanism 16 is provided between the handling depth adjustment mechanism 7 and the handling depth adjustment mechanism 7, and a control lever 20 is provided on the handling depth adjustment mechanism 7 to manually operate the mechanism 16.
A lever guide frame 24 is provided in the operating section of the combine harvester, and the lever guide frame 24 is provided with locking grooves 26 for locking the lever at appropriate intervals in the handling depth adjustment direction of the lever 20. A device for adjusting the handling depth of a combine harvester, characterized in that the lever 20 is configured to be switchable between a posture in which the lever 20 can be locked and held and a posture in which it cannot be locked and held. 2. The combine harvester handling depth adjusting device according to claim 1, wherein the attitude of the guide frame 24 is changed by reversing the front and back sides.