JPH0615283Y2 - Work device position adjustment structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a combine lever provided with an operation lever for manually adjusting the movement of a grain-carrying and carrying device in the carrying direction in order to adjust the handling depth. With regard to the handling depth control device and the like, more specifically, while fixing an engaging member for following the working device adjusting lever which can be rocked by an artificial operation force, the lever is moved in a direction orthogonal to the rocking direction. By swinging, it is possible to switch the engagement member between the automatic operation state in which it engages with the drive gear linked to the actuator that is the drive source during the automatic position control of the work device and the manual operation state in which the engagement is released. The present invention relates to a configured position adjusting structure for a work position.

[Conventional technology]

In such a position adjusting structure of the working device, in order to prevent the lever in the automatically operated state from exceeding the mechanical swing limit position and being overloaded to the drive system including the actuator, the mechanical system is prevented from being damaged. A limit switch for detecting that the lever has reached the position just before the rocking limit is provided, and the detection signal is output to the controller of the actuator to stop the abnormal drive of the actuator.

[Problems to be solved by the invention]

However, heretofore, this type of switch has used a type in which a detection signal is output by being pressed by being brought into contact with a lever, and therefore the following problems occur. It was That is, the contact piece of the switch projects toward the front of the swing limit position of the lever, and outputs a detection signal until the lever reaches the swing limit position. Therefore, if the lever is switched and swung in order to keep it in the automatic operation state after the lever is set to the swing limit position in the manual operation state, the lever collides with the contact piece of the switch from the lateral direction and damages the switch operation piece. There was a risk of it getting lost.

The present invention focuses on such a situation and aims to prevent the switch from being damaged when the lever in the manual operation state and the mechanical swing limit position is switched to the automatic operation state to swing. .

[Means for solving problems]

The characteristic configuration of the present invention made to achieve the above object detects that the lever is pushed to a position immediately before the mechanical rocking limit of the lever in the automatic operation state and is immediately before the rocking limit. With a limit switch,
The operating piece contact portion is configured to be wide in the lever switching direction so that the operating piece of the limit switch is maintained in the pressing operation state regardless of each operating state of the lever.

[Action]

That is, according to the above configuration, even when the lever is in the manual operation state and is in the swing limit position, the operation piece is in the pressing operation state via the operation piece contact portion having a wide width. Then, the switching of the swing of the lever to the automatic operation state is performed while the operation piece is maintained in the pressing operation state.

[Effect of device]

Thus, according to the present invention, the lateral collision of the lever with the switch operating piece, which has occurred at the time of switching the swing of the lever, is avoided, thereby improving the reliability and durability of the switch.

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIG. 6, a raising device (1) that acts on the planted culm.
And a pretreatment unit having a mowing device (2) and a vertical conveying device (3) that is an example of a working device for conveying the mowing culm to the rear of the machine, a crawler traveling device (4), a threshing unit (5) and a control unit. The combine is configured by being provided in the front part of the traveling machine body having the part (6) and the like.

As shown in FIG. 4, the vertical transfer device (3) comprises a holding transfer device (7) that acts on the root side of the cut grain culm and a locking transfer device (8) that acts on the tip side, And the reaper (2)
The grain culm is taken up in a standing posture, lifted and conveyed to the rear of the machine, changed to a sideways posture at the conveying end portion, and supplied to the starting end portion of the threshing feed chain (9).
Then, the rear end side of the vertical transfer device frame (10) is connected to the pretreatment section frame (11) so as to rotate around the axis (P ₁ ), and the front end side is provided with a bending and stretching link mechanism (12). Is connected to the pretreatment frame (11) via the holding carrier device (7) around the shaft core (P ₁ ) on the carrier end side.
With (8), it is configured to swing in the direction of the culm of the transported grain culm. In other words, by the swinging of the holding and conveying device (7),
When the holding and conveying device (7) takes over the cut culm, the holding position changes to the culm direction, and the threshing section (5) handles the handling room (not shown).
The length of the culm, that is, the handling depth, is changed.

The operation lever (13) for swinging the holding and conveying device (7) is attached to the link (12a) on the side of the pretreatment frame (11) of the bending and stretching link mechanism (12) and driven by the lever (13). A rack gear (14), which is an example of an engaging member for a vehicle, is fixed. As shown in FIGS. 2 and 3, a drive pinion gear (15) that engages with the rack gear (14) from the lever axis (P ₂ ) direction is provided on the electric motor support member (16) and the operating lever. It is attached to the pretreatment frame (11) through the lever guide (17) acting on (13) and the lever guide column (18), and is also an electric motor (19) which is a kind of actuator.
It is configured to be rotationally driven in the forward rotation direction and the reverse rotation direction in conjunction with. That is, the electric motor (19),
The operation lever (13) is oscillated around the axis (P ₂ ) to automatically oscillate the holding and conveying device (7). Then, when the operating lever (13) is rocked around an axis (P ₃ ) substantially orthogonal to the axis (P ₂ ), the rack gear (14) is disengaged from the pinion gear (15). With the construction, the operation lever (13) is oscillated by the spring (20) toward the side where the rack gear (14) engages with the pinion gear (15), and the operation lever (13) is moved to the rack gear (14). The shaft core while maintaining a state where it disengages from the pinion gear (15).
By swinging around (P ₂ ), the link (12
It is arranged that a) swings to switch to the manual operation of the holding and conveying device (7).

As shown in FIG. 1, a limit switch (SW) that outputs a detection signal when the operation piece (27) is pressed is provided on the lower side of both ends of the lever guide (17).
The operation lever (13) is provided with an operation piece contact portion (28) for contacting and pressing the operation piece (27). The operation piece contact portion (28) is U-shaped, and when the operation lever (13) is at the mechanical rocking limit position, the operation piece (27) is in both the manual operation state and the automatic operation state. In order to maintain the pressed state, both opposing pieces are configured to have a wide width.

As shown in FIG. 5, a pair of rocking type first sensors (21a), (21b) for contacting the grain culms conveyed by the vertical conveying device (3) are provided in the conveyance grain culm. The locking and transporting device via one support member (22) in a state of being juxtaposed in the culm direction.
Attached to the support frame (23) of the transfer guide rod (8a) of (8) and the grain-carrying rails of the holding-carrying device (7), the position of the tip of the carrier-grid-carrying-carrying device (7) with respect to the holding device. The detection depth is configured to be detected. That is, when only the first sensor (21a) on the stock-source side of the pair of the first sensors (21a) and (21b) comes into contact, the culm length from the holding position to the tip of the ear by the holding carrier device (7). Is determined to be within the setting range, and when the pair of first sensors (21a) and (21b) come into contact with each other, the handling depth becomes deeper than the setting range. If the pair of the first sensors (21a) and (21b) are not in contact with each other, it is determined that the culm length is the one whose handling depth becomes shallower than the set range. I am doing it.

Then, a first switch (24a or 24b) for electrically outputting the detection result of each of the pair of first sensors (21a), (21b) is separately processed through a handling depth control mechanism (not shown). A second switch part (2) which is connected to the drive circuit of the electric motor (19) and electrically takes out the detection result of the second sensor (25) for detecting the presence of grain culm of the vertical transfer device (3).
6) is linked to the handling depth control mechanism. The handling depth control mechanism automatically detects that the handling depth is within the set range when the second sensor (25) is in the detection state. Automatically output a predetermined signal to the drive circuit based on the information from the pair of first sensors (21a) and (21b) so that the pair of first sensors (21a) and (21b) are in the state. By electric motor (19)
It is configured to automatically control. Further, the cutting state of the second sensor (25) and both of the first sensors (21a), (21
When the detection state or non-detection state of b) continues, or when an erroneous detection is made, when the electric motor (19) continues to be driven in only one direction and the operating lever (13) approaches the swing limit position. The limiter switch (SW) detects it and stops further driving of the electric motor (19).

In short, when cutting grain culms are supplied to the vertical conveyor (3), the cutting depth can be automatically controlled, while keeping the cutting depth almost constant regardless of changes in the culm length of the cutting grain culms. The working depth can be artificially adjusted by switching the operating lever (13) to the state of releasing the interlocking with the electric motor (19) so as to be able to work, and if necessary.

[Another embodiment]

An operation piece contact portion (28) for implementing the present invention may be provided on the operation piece (27) side.

It should be noted that although a number is given in the section of the scope of claims for utility model for convenience of comparison with the drawings, the present invention is not limited to the structure of the accompanying drawings by the entry.

[Brief description of drawings]

The drawings show an embodiment of a position adjusting structure of a working device according to the present invention. FIG. 1 is a plan view of a main part, FIG. 2 is a side view of a working device lifting lever viewed from a swing direction, and FIG. FIG. 4 is a diagram showing an engagement state between an engagement member and a gear, FIG. 4 is a diagram showing a schematic configuration of a working device, FIG. 5 is a diagram showing a mounting structure of a sensor that outputs a detection signal during automatic position control, and FIG. The figure is a front side view of a combine to which the present invention is applied. (3) …… Working device, (13) …… Working device adjusting lever, (1
4) ...... Engagement member, (15) ...... Gear, (19) ...... Actuator, (27) ...... Operation piece, (28) ...... Operation piece contact part, (SW) ...
… Limited switch.

Claims (1)

[Scope of utility model registration request] Claims: 1. A work device adjusting lever (13) which can be rocked and adjusted by a manipulating force is fixed to a follower engaging member (14), and the lever (13) is set in the rocking direction. By swinging in the orthogonal direction, the engaging member (14) is automatically engaged with the driving gear (15) that is interlocked with the actuator (19) serving as a drive source during automatic position control of the working device (3). In the position adjusting structure of the working device that is configured to be switchable between an operating state and a manual operating state for releasing the occlusion, the lever (1) is provided at a position immediately before the mechanical swing limit of the lever (13) in the automatic operating state.
A limit switch (SW) is provided to detect that the push switch is pressed to the position immediately before the rocking limit, and the operation piece (27) of the limit switch (SW) is irrespective of each operating state of the lever (13). A position adjusting structure for a working device in which the operating piece contact portion (28) is configured to be wide in the lever switching direction so as to be maintained in a pressing operation state.