JPH0976789A - Stopping device in walking type work vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To forcibly stop an engine without releasing a hand from a handle. SOLUTION: This walking type rice planter includes side clutch levers 52 and 52 for switching ON/OFF power transmitted from an engine 31 to left and right wheels 7 and 7 in the left and right grasping parts 36a and 36a of a handle 36 extended to the rear side of a machine body 4. Engine stop switches 20 and 20 respectively controlled following the operations of the side clutch levers 52 and 52 are provided in the vicinity of the side clutch levers 52 and 52. By simultaneously switching OFF the left and right side clutches 52 and 52, the engine is forcibly stopped by the engine stop switches 20 and 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stop device for a walk type work vehicle such as a rice transplanter, and more particularly to an engine stop device for a walk type work vehicle provided with side clutch levers on the left and right grips of a handle.

[0002]

2. Description of the Related Art As shown in FIGS. 3 and 4, a walk-type working vehicle of this type, such as a rice transplanter, has a work (planting) clutch lever 2 at the center of a handle 36 portion extending to the rear of the machine.
Further, a control panel 50 on which the traveling clutch lever 5 is disposed is provided, and left and right side clutch levers 52 and 52 are disposed on the left and right grip portions 36a and 36a of the handle 36, respectively.

When it is desired to turn the machine body when working in the field or when traveling on the road, the side clutch lever 52 on the inner side of the turn is grasped by operating the left and right side clutch levers 52, 52 to move the machine body left and right. It is possible to control turning. Further, when the left and right side clutch levers 52, 52 are simultaneously gripped, the power transmission from the engine 31 to the left and right wheels 7, 7 is cut off. Therefore, when the operator wants to stop the aircraft, the handle braking force by the operator is applied. The aircraft can be stopped while being supported.

At this time, the left and right side clutch levers 5
Since the engine 31 remains operating without stopping when the gripping operation is performed on the valves 2 and 52 at the same time, when the side clutch levers 52 and 52 are released, the power of the engine 31 starts the traveling of the machine body again. Therefore, in order to stop the traveling of the body even when the left and right side clutch levers 52, 52 are released, for example, the main switch 21 must be turned off to stop the engine 31. The main switch 21 is provided near the control panel 50 and is connected to the engine 31 side via a wire 25.

[0005]

However, in order to perform the switching operation of the above-mentioned main switch 21, for example, of the pair of left and right handles 36, 36, one handle 36 is held and the other handle 36 is used. Since it is necessary to release the switch and perform the cutting operation of the main switch 21, this cutting operation is troublesome. Further, until the main switch 21 is turned off, the engine 31 is in an operating state, and the power of the engine 31 keeps the machine body moving. Therefore, there is a problem that the operator needs to perform a quick turning operation. .

The present invention has been made in order to solve such a problem, and its object is to make it possible to forcibly stop the engine without releasing the handle from the steering wheel and to improve the operability. It is an object of the present invention to provide a stop device for a walk-behind work vehicle that is improved.

[0007]

In order to achieve this object, the present invention has a handle (36) extending to the rear of the machine body (4), and the left and right grip portions (36a, 3a) of the handle (36).
6a) to the left and right wheels (7, 7) from the engine (31)
In a walk-behind work vehicle equipped with left and right side clutch levers (52, 52) for turning on and off the power transmitted to each, switching control is performed in accordance with the operation of the left and right side clutch levers (52, 52). An engine stop switch (20, 20) is provided, and the engine is forcibly stopped by the engine stop switch (20, 20) based on simultaneous operation of turning off the left and right side clutch levers (52, 52). It is characterized by having done.

(Operation) According to the present invention having the above-mentioned configuration, the left and right wheels (36a, 36a) of the handle (36) extending to the rear of the machine body (4) from the engine (31) to the left and right wheels ( The left and right side clutch levers (52, 52) are provided for turning on and off the power transmitted to each of the left and right side clutch levers (52, 52).
There are provided engine stop switches (20, 20) which are controlled to be switched in accordance with the operation of (1), and by operating the left and right side clutch levers (52, 52) simultaneously, the engine stop switches (20, 20) are switched. Since the engine (31) is forcibly stopped via the steering wheel, the traveling of the airframe (4) and the engine (31) can be stopped immediately by only operating the lever without releasing the hand from the handle (36). Become.

The reference numerals in parentheses described above are shown for reference to the drawings and do not limit the structure of the present invention.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. It should be noted that the same or corresponding members as those of the above-described conventional example are designated by the same reference numerals and described.

FIG. 1 is a side view of a walk-behind rice transplanter as a walk-behind work vehicle according to the present invention. An engine 31, a mission case 32 and a frame 3 are provided in front of the machine body 4.
3 and the like, a handle 36 is extended behind the machine body 4 so as to incline, and a seedling stand 37 is provided slidably in the left-right direction. A planting rod 38 is provided at the lower end of the seedling mounting table 37.
Further, below the frame 33, there is a rear swing fulcrum 11.
Float 11 as an earth pressure sensor swingable around a
Is suspended. The float 11 constitutes a body height detection mechanism for detecting the earth pressure on the rice field surface and detecting the body height. Further, an output shaft 39 is provided so as to penetrate through the mission case 32 from both left and right ends thereof, and further, at both ends of the output shaft 39, chain cases 6 and 6 which are swingable about the output shaft 39 are supported. Moreover, paddy wheels 7, 7 are supported at the tips of the chain cases 6, 6.

In front of the machine body 4, the bumper member 4 fixed to the engine 31 and the mission case 32.
2, a hydraulic cylinder 9 for adjusting the height of the machine is disposed, and the hydraulic cylinder 9 rotates the chain case 6 around the output shaft 39 to thereby control the paddy wheels 7, 7. It is moved up and down so that the planting depth of the seedlings is almost constant. Further, a planting clutch lever 2 or a traveling clutch lever 5 as a manual operating lever is arranged on a control panel 50 provided at the center of the handle 36 portion, and the manual operating lever is planted via an intermediate link shaft 17. It is connected to various clutches (not shown) such as a clutch or a traveling clutch. In addition, the left and right grips 36a of the handlebar 36 have side clutch levers 52 for turning on and off the power transmitted from the engine 31 to the left and right paddy wheels 7, 7, respectively.
52 are arranged respectively. In the drawing, reference numeral 53 denotes a main speed change lever.

The planting clutch lever 2 and the traveling clutch lever 5, which are slidable along the guide groove of the control panel 50, are rotatably supported on the lower portion of the handle 36 by a bracket 59, respectively. 5
9 is transmitted via wires 60, 60. Also,
From the plates 59, 59, the planting clutch rod 13 and the traveling clutch rod 16 extend forward of the machine body 4, and the wires 61, 61 extending from the left and right side clutch levers 52, 52, respectively, are the handles 36.
After being guided downward through the handle frame 40,
It is guided forward along the frame 33. Further, a lower operation panel 51 is provided below the seedling mounting table 37, and the lower operation panel 51 is provided with a planting depth adjusting lever 54.

Here, the present invention is based on providing an engine stop switch which is controlled to be switched in accordance with the operation of the left and right side clutch levers 52, 52, and simultaneously turning off the left and right side clutch levers 52, 52. The engine stop switch is forcibly stopped.

That is, as shown in FIG. 1 described above, the engine stop switches 20, 20 are provided on the left and right grip portions 36a, 36a of the handle 36, and the engine stop switches 20, 20 are normally "open". It has a built-in contact that is closed by pressing. Also,
The mounting position is the side clutch levers 52, 52.
Gripping the side clutch lever 5
2, 52 are arranged at positions where they abut against the engine stop switches 20, 20 and push them.

Moreover, in the present embodiment, when the side clutch lever 52 is gripped, the side clutch is "on" in the state of (a) of FIG. However, when the side clutch lever 52 is held deeper (C) than the (B) position, the engine stop switch 20 is turned off.
Is set to work. Therefore, by operating the side clutch lever 52, the side clutch is first disengaged, and then the engine stop switch 20 is operated.

FIG. 2 shows a wiring structure at this time, in which the engine 31 and the headlight 22 are connected to the main switch 21 via a wiring cable 23, and further, the wiring is provided between the engine 31 and the main switch 21. The left and right engine stop switches 20, 20 are wired in series via a cable 24, and the main switch 21 side thereof is grounded to GND.

In the above, when the one of the left and right side clutch levers 52 is gripped, the one side clutch is disengaged and the one engine stop switch 20 is operated (switch contact is connected). Then, the other engine stop switch 20 is not operating (switch contact is open). Therefore, the wiring route of the wiring cable 24 including the engine stop switches 20 and 20 is in an electrically disconnected state, and the engine 31 continues to operate.

Next, the left and right side clutch levers 52,
When 52 is simultaneously gripped, both left and right side clutches are disengaged, and both left and right engine stop switches 2
Since 0 and 20 operate (switch contacts are connected), the wiring route of the wiring cable 24 including these engine stop switches 20 and 20 is in an electrically connected state,
This causes the engine 31 to switch the engine stop switch 20,
It is grounded to GND via 20 and the operation of the engine 31 is stopped.

Next, the operation of this embodiment will be described.

In order to carry out planting work with the walk-type rice transplanter, the traveling clutch lever 5 is operated to the on position, and the wire 60 extending laterally of the machine body and the traveling clutch rod 16 are provided.
The traveling clutch operating portion is operated via the above-mentioned means to bring the traveling clutch into the connected state, and the planting clutch lever 2 is operated to the on position. Then, rod 1 for planting clutch
The planting clutch operation unit is operated via 3 to bring the planting clutch into the connected state. As a result, the walk-behind rice transplanter is driven while the paddy field wheels 7 are driven, and the planting rod 38 is rotated to perform the planting work.

At this time, on the basis of the earth pressure detection of the float 11, the airframe 4 is switched to a raised position, a lowered position and a neutral position so that the machine body 4 has a constant height with respect to the paddy field, and the hydraulic cylinder 9 is used to move the paddy wheels 7 and 7. It moves up and down and the height of the aircraft is automatically controlled.

When the walking type rice transplanter reaching the headland is turned, the planting clutch lever 2 is operated to the off position while the traveling clutch lever 5 is held at the on position. Then, the planting clutch is cut off and the planting rod 3
The rotation of 8 is stopped.

On the other hand, there are cases where the operator wants to stop the rice transplanter urgently for some reason when in a working state or while traveling on the road. In such a case,
As long as the left and right side clutch levers 52, 52 are simultaneously and fully gripped, the left and right side clutch levers 52 and 52 can be operated without releasing the hand from one handle 36 and operating the main switch 21 provided near the control panel 50. The engine 31 is cut off, and then the engine 31 is automatically stopped.

Therefore, even if the left and right side clutch levers 52, 52 are released at the same time after the engine 31 has stopped, there is no possibility that the machine body 4 will automatically travel with the power of the engine 31. If you want to start traveling again,
The engine 31 may be operated by pulling the recoil starter.

[0026]

As described above, according to the present invention, since the engine stop switches that are controlled to be switched in accordance with the operation of the left and right side clutch levers are provided, if the left and right side clutch levers are simultaneously gripped, the steering wheel The engine can be stopped automatically without releasing your hand, and the aircraft can be stopped running, which is effective when you want to stop the aircraft in an emergency, and further improves operability and handleability. Can be improved.

[Brief description of drawings]

FIG. 1 is a side view of a walk-behind rice transplanter to which the present invention is applied.

FIG. 2 is a diagram showing a wiring structure including an engine stop switch.

FIG. 3 is a side view of a main part of a conventional walk-behind rice transplanter.

FIG. 4 is a partial plan view of FIG.

[Explanation of symbols]

 2 Planted clutch lever 4 Aircraft 5 Travel clutch lever 7 Paddy wheels 20 Engine stop switch 21 Main switch 23, 24 Wiring cable 31 Engine 36 Handle 36a Grip 50 Control panel 52 Side clutch lever

Claims (1)

[Claims] 1. A walk-behind work vehicle having a handle extending to the rear of the machine body, and left and right side clutch levers for turning on and off the power transmitted from the engine to the left and right wheels respectively at the left and right grips of the handle. In the above, an engine stop switch that is controlled to be switched in accordance with the operation of the left and right side clutch levers is provided, and the engine is forcibly stopped by the engine stop switch based on simultaneously turning off the left and right side clutch levers. A stop device in a walk-behind work vehicle characterized by the above.