JP2854494B2 - Operation tool position detection structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention includes an operation lever which can be manually operated over a plurality of operation positions, and a plurality of detection switches for detecting which operation position the operation lever is operated. The present invention relates to a position detection structure of an operating tool configured to perform a predetermined control operation based on a detection result of each detection switch.

[0002]

2. Description of the Related Art Conventionally, in a position detecting structure of an operating tool, as shown in FIG. 3 of Japanese Utility Model Application Laid-Open No. 63-44826, a detecting switch is provided at a position corresponding to a detecting operation position of an operating lever. , Respectively, to detect the operation state of the operation lever.

[0003]

[SUMMARY OF THE INVENTION However, the above conventional structure, it is necessary to respectively disposed on another <br/> portion in which a plurality of detecting switches at a distance, a support member of each switch It is necessary to separately mount and support the body side frame member through the intermediary, and there is a drawback that the mounting structure is complicated, and the operation position detection accuracy of each operation lever is reduced due to the variation in the mounting accuracy, etc. There was also an adverse effect. An object of the present invention is to eliminate the above disadvantages.

[0004]

According to a feature of the present invention, there is provided a position detecting structure for an operating tool which is configured to perform a predetermined control operation in the position detecting structure for an operating tool described at the beginning. Each detection switch sandwiches one support member
Thereby fastened together in no condition to the support member
An operating member that moves integrally with the operating lever that is pivotally supported so as to swing freely has a contact portion that is in contact with each detection piece of each of the detection switches.

[0005]

[Function] A plurality of detection switches sandwich one support member.
Are fastened together to the free state, moreover, axially supported by the support member
A plurality of contact portions respectively formed on one operating member that moves integrally with the operating lever are configured to act on the detecting pieces of the respective detecting switches.
In addition to maintaining high positional accuracy,
Check the relative positional relationship between the detection switch and
By maintaining the degree, the detection accuracy is improved.

[0006]

Accordingly, by rationally improving the plurality of detection switches and the detection operation member, the operation positions of the plurality of levers can be detected with high accuracy, and the mounting position can be improved. And the number of assembly steps can be reduced.

[0007]

Embodiments will be described below with reference to the drawings. FIG.
As shown, the link to the rear portion of the riding traveling machine body 1 mechanism 2
The seedling planting device 3 can be driven up and down by a lift cylinder 4 and can be driven and rolled around a longitudinal axis by a rolling motor M through the lift cylinder 4 so that the seedlings can be planted on a mud surface while running the machine. A riding type rice transplanter is constructed. An engine 5 is mounted on the front of the traveling body 1 and the power of the engine 5 is transmitted to a belt-type continuously variable transmission 6 and a gear-type main transmission 7 in a transmission case 7.
The transmission system is configured such that an output synchronized with the vehicle speed is transmitted to the seedling planting device 3 via the planting clutch 11 which is transmitted to the front and rear wheels 8 and 9 via the “a” and is turned on and off by the electric motor 10. It is. The seedling planting device 3 includes a seedling rest 12 that reciprocates horizontally with a constant stroke in the left-right direction, a planting mechanism 13 that takes out seedlings one by one from the lower end of the seedling rest 12 and planted them in a field. The planting device 3 is provided with a plurality of grounding floats 14 and the like that perform a ground leveling operation while following the ground. It is configured so that it can be manually operated based on the operation of the lifting lever 20. As shown in FIG. 1, a forward / backward operation amount of the artificial elevating lever 20 is detected by a potentiometer type lever sensor 21, and a control device 22 equipped with a microcomputer discriminates a zone for each set level and outputs the output to each operation position. The switching control of the electromagnetic hydraulic control valve V for the lift cylinder 4 is performed so that a corresponding operation state is obtained. That is, when the elevating lever 20 is operated to the “elevated position”, the seedling planting device 3 is forcibly elevated to the maximum position. At this time, the detection that the seedling planting device 3 has moved up to the maximum ascending position is detected by the link mechanism 2 contacting the upper limit switch SW2 attached to the rear wheel fender 23. When operated to the "neutral position", the seedling planting device 3 holds the current level, and when operated to the "down position", the seedling planting device 3 descends until it touches the mud surface. Further, when the planting operation is performed to the "planting position", the seedling planting device 3 is lowered to the ground, and the electric motor 10 is driven to set the planting clutch 11 into operation to set the planting operation state. The lifting lever 20 is moved to the "automatic position" via a path extending laterally outward from the "neutral position".
The switching to the "automatic position" is similarly determined by the control device 22 by the zone determination of the detection value of the lever sensor 21. In the "automatic position", the up / down operation by the up / down operation switch as described later and the ascent operation at the time of reverse travel are allowed. A swing lever type raising / lowering operation switch SW1 is provided below the steering handle 16 and is urged to return to the cutting side, and the seedling planting device 3 is forcibly raised to the maximum raising position based on the operation of the switch SW1. And a state in which it is lowered to the ground.

Then, the seedling planting depth, that is, the seedling planting device 3
Automatic raising and lowering control means A for driving and controlling the lift cylinder 4 so that the height of the mud surface is always kept constant, and automatic rolling controlling means B for driving and controlling a rolling motor so as to maintain the seedling planting apparatus in a horizontal posture. Is provided. That is,
A potentiometer for detecting a vertical swing amount caused by a change in the ground height above the front side of the ground float 14 located at the center in the left and right direction among the ground floats 14 provided to be vertically swingable around the rear horizontal axis X. Type float sensor 24. The electromagnetic hydraulic control valve V of the lift cylinder 4 is controlled by the control device 22 so that the detection value of the float sensor 24 matches the set value of the potentiometer type sensitivity adjuster 25.
Is controlled by switching. In addition, an inclination sensor 30 for detecting a left-right inclination angle from the horizontal posture of the seedling planting apparatus 3 is provided, and an output of the inclination sensor 30 is set to a value set by a potentiometer-type rolling angle setting device 31 provided in a control unit. The driving of the rolling motor M is controlled so as to match.

A reverse detection switch 27 which is turned on when it detects that the main transmission 7a has been operated to the reverse position.
And a neutral detection switch 29 for detecting that the main transmission 7a has been operated to the neutral position is provided in the middle of the linkage of the transmission lever 28, and when the reverse detection switch 27 is turned on,
The control device is configured to forcibly raise the seedling planting device 3 to a high position detected by the upper limit switch SW2. When the neutral detection switch 29 is turned on, the automatic rolling control operation is stopped. As shown in FIGS. 3 and 4, the reverse detection switch 27 and the neutral detection switch 29 are integrally fastened and fixed together with screws while sandwiching a support stay 33 extending from the handle post 32, and are mounted. The relay turning member 34 of the variable speed lever 28 pivotally supported by the support stay 33 [an example of an operating member]
In addition, contact portions 34a and 34b that contact the detection pieces 27a and 29a of the detection switches 27 and 29 at positions corresponding to the detection operation positions are formed, and the shift lever 28 and the detection switches 27 and 29 are formed. Is configured to reduce the mounting error. Then, as shown in FIG. 2, when the shift lever 28 is operated to the neutral position during the planting operation in which the elevating lever 28 is in the “automatic position”, the control device 22 moves the seedling planting device 3 to the horizontal posture. It is returned to stop the automatic rolling control operation, and then when it is operated to the reverse position, the seedling planting device 3 is forcibly raised to the upper limit position and stopped [steps 1 to 6]. Thereafter, when the shift operation is performed to the forward traveling side, the automatic rolling control mode and the automatic elevating control mode are set.

[0010] In the claims, reference numerals are provided to facilitate comparison with the drawings, but the present invention is not limited to the configuration of the attached drawings by the entry.

[Brief description of the drawings]

FIG. 1 is a control block diagram.

FIG. 2 is a control flowchart.

FIG. 3 is a side view of a detection switch mounting portion.

FIG. 4 is a plan view of a detection switch.

FIG. 5 is a side view of the rice transplanter.

[Explanation of symbols]

 27, 29 Detection switch 27a, 29a Detection piece 28 Operating lever 33 Support member 34 Operating member 34a, 34b Contact portion

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) A01C 11/02 330 B60K 20/00 B60K 23/00 G05G 1/04

Claims (1)

(57) [Claims] An operation lever (28) which can be manually operated over a plurality of operation positions, and a plurality of detection switches (27) for detecting in which operation position the operation lever (28) is operated. , (29), and a position detection structure of an operating tool configured to perform a predetermined control operation based on the detection result of each detection switch (27), (29). 27) and (29) are fastened together so as to sandwich one support member (33), and are pivotally supported with respect to the support member (33).
An operating member (34) that moves integrally with the operating lever (28) and a contact portion that contacts the detection pieces (27a) and (29a) of the detection switches (27) and (29). (34a) A structure for detecting the position of the operating tool on which (34b) is formed.