Operation device for riding-type working vehicle

Abstract

To properly actuate a safety alarm with an operation device for a riding-type working vehicle that not only travels with steering operations by an operator basically while sitting on a driving seat of a machine body but also may travel by an operator while getting off the machine body.SOLUTION: An operation device for a riding-type working vehicle does not output a seating alarm when an operator controls the vehicle to travel using a slow-speed forward lever 8 that is operated while the operator walks in the riding-type working vehicle including an alarm unit 38 that outputs the seating alarm when the operator sits on a driving seat 20 and operates a main gearshift lever 17 on a travel side while not fastening a seat belt 33.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a control device for a riding work vehicle that can be operated by riding on the vehicle during work, but can also be operated by getting off the vehicle and walking when traveling in dangerous areas. [Background technology]

[0002] Patent Document 1 describes a riding rice transplanter as a riding work vehicle, and when this riding rice transplanter is driven on roads or used to transplant seedlings in a field, an operator sits in a driver's seat on the vehicle and operates the vehicle, but if the vehicle becomes unstable when entering or leaving a field, the operator gets off the vehicle and operates a slow-speed forward lever on the front of the vehicle to move the vehicle forward. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 7156479 Summary of the Invention [Problem to be solved by the invention]

[0004] In ride-on work vehicles, where the worker sits in a cockpit and operates the vehicle, a seat belt is provided to restrain the worker in the cockpit to prevent the worker from being thrown out, and if the seat belt is not fastened when the vehicle is moving, a safety alarm such as an alarm or warning lamp goes off to warn the worker. However, if there is a high possibility that the vehicle will become unstable, the worker will walk along the side of the vehicle and operate a slow-speed forward lever located at the front of the vehicle to move the vehicle, but in this case, a safety alarm is not necessary and the alarm can be annoying.

[0005] To provide an object of the present invention to properly activate a safety alarm in a control device of a passenger work vehicle which is basically driven by sitting in a cockpit of the vehicle and performing control operations, but which may also be driven by getting off the vehicle. [Means for solving the problem]

[0006] The above-mentioned object of the present invention is achieved by the following technical means.

[0007] The invention of claim 1 is a control device for a ride-on work vehicle in which an alarm 38 outputs a seated warning when the operator sits in the driver's seat 20 and operates the main shift lever 17 to the travel side without fastening the seat belt 33, and the seated warning is not output when the vehicle is driven using the slow forward lever 8, which is operated by the operator while walking.

[0008] The invention of claim 2 is a control device for a riding work vehicle as described in claim 1, characterized in that an alarm 38 that outputs a seating alarm is provided on the operation panel 13 below the steering handle 16 located in front of the driver's seat 20.

[0009] The invention of claim 3 is a steering device for a passenger work vehicle as described in claim 1, characterized in that a seat belt pull-out portion 33A is attached to the vehicle body 1 on the left side of the driver's seat 20 provided on the engine cover 18, and a seat belt 33 is provided between the seat belt pull-out portion 33A and the vehicle body 1 on the right side of the driver's seat 20 to hold and restrain the worker sitting in the driver's seat 20.

[0010] The invention of claim 4 is the steering device for the riding work vehicle according to claim 1, characterized in that the driving speed sensor 60 does not activate the alarm 38 when the vehicle is traveling at an extremely low speed, even if the seat belt 33 is not fastened.

[0011] The invention of claim 5 is the steering device for a riding work vehicle according to claim 3, characterized in that the parking brake sensor 61 detects a parking operation and unlocks the seat belt locking section 33B a predetermined time later. [Effects of the Invention]

[0012] In the invention of claim 1, when an operator sits in the cockpit 20 and moves the main shift lever 17 to the travel side without fastening the seat belt 33 to drive the vehicle 1, the alarm 38 issues a seated warning, which is safe, but when the operator gets out of the cockpit 20 and operates the slow forward lever 8 while walking to drive the vehicle 1, the alarm 38 does not issue a seated warning and the vehicle can be driven without any hassle.

[0013] In the invention of claim 2, when an operator sits in the driver's seat 20 and starts driving without fastening the seat belt 33, the seat belt alarm 38 provided on the operation panel 13 below the steering handle 16 outputs a seated alarm, so that the operator immediately notices and fastens the seat belt 33, thereby avoiding a dangerous situation.

[0014] In the invention of claim 3, the operator sitting in the driver's seat 20 provided on the engine cover 18 is firmly fixed to the vehicle body 1 by the seat belt 33 between the seat belt pull-out portion 33A and the seat belt lock portion 33B provided on the vehicle body 1, thereby preventing the operator from being thrown off while driving and ensuring safety.

[0015] According to the invention of claim 4, even if the driver stands up from the driver's seat 20 while the vehicle body 1 is traveling safely at an extremely low speed, the alarm 38 does not go off, so that the driver can perform tasks other than driving without any hassle.

[0016] In the invention of claim 5, when the parking brake sensor 61 is activated to completely stop the vehicle body 1, the seat belt locking portion 33B of the seat belt 33 is automatically released, so that the worker can immediately stand up from the operator's seat 20 and perform the next task. [Brief explanation of the drawings]

[0017] [Figure 1] FIG. 1 is a right side view of a riding rice transplanter according to an embodiment of the present invention. [Figure 2] FIG. 1 is a front view of a riding rice transplanter according to an embodiment of the present invention. [Figure 3] FIG. 1 is a plan view of an operation panel of a riding rice transplanter according to an embodiment of the present invention. [Figure 4]FIG. 1 is a control block diagram of a riding rice transplanter according to an embodiment of the present invention. [Figure 5] FIG. 1 is a right side view of a riding rice transplanter according to an embodiment of the present invention. [Figure 6] FIG. 1 is an enlarged front view of a riding rice transplanter according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0018] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0019] 1 is a side view of a riding rice transplanter as an example of a work vehicle embodying the present invention. In this specification, the left and right sides of the rice transplanter as viewed in the forward direction are referred to as the left and right sides, respectively, and the front and rear are referred to as the forward direction.

[0020] Here, reference numeral 2 denotes a lifting link device for vertically moving a seedling planting device 3 mounted on the rear of the vehicle body 1 so that it can move up and down. Reference numeral 4 denotes a fertilizer applicator mounted on the upper rear part of the vehicle body 1. The vehicle body 1 is a four-wheel drive vehicle having a pair of front wheels 6, 6 and a pair of rear wheels 7, 7, which are drive wheels.

[0021] As shown in FIG. 1, a transmission case 11 and an engine 12 are arranged on main frames 10a, 10b of a vehicle body 1, a hydraulic pump is assembled integrally with the transmission case 11 on the rear side of the transmission case 11, and a steering post 14 is erected above the front of the transmission case 11.

[0022] A steering handle 16 is provided at the upper end of the steering post 14. A step floor 19 serving as a passenger floor is attached to the lower part of the vehicle body 1, and a driver's seat 20 is installed on an engine cover 18 that surrounds the engine 12. A main speed change lever 17 (hereinafter also referred to as the HST lever 17 as an example) is provided on the left side of the steering handle 16, and an auxiliary speed change lever 26 is provided on the right side.

[0023] An operation panel 13 for displaying operation control data is provided on a steering post 14 in front of the operator's seat 20.

[0024] A clutch lever is provided on the right side of the driver's seat 20. The front wheels 6, 6 are journaled on front wheel support cases 22, 22 that are mounted on the sides of the transmission case 11 so that their orientation can be changed. The rear wheels 7, 7 are journaled via rear wheel supports 30 on rear wheel transmission cases 24, 24 attached to both the left and right ends of the left and right frames.

[0025] As shown in FIG. 1, which shows a portion of the power transmission mechanism to the rear wheels 7, the rotational power of the engine 12 is transmitted to the input shaft 32a of the hydraulic continuously variable transmission (HST) 31 via a pulley 27, a belt 28, and a pulley 29 in that order, and is then transmitted from the output shaft 32b of the HST 31 into the transmission case 11.

[0026] The rear end of the rear output shaft 11a of the transmission case 11 protrudes rearward from the transmission case 11, and left and right rear wheel transmission shafts 35, 35 that transmit power to the rear wheel transmission cases 24, 24 are connected to this protruding end. The left and right rear wheel transmission shafts 35, 35 are configured to drive and rotate the left and right rear wheels 7, 7, respectively.

[0027] Additionally, an inverted U-shaped front handle (ridge-crossing handle) 5 is pivotally mounted on the front of the vehicle body 1. This front handle 5 can be gripped by an operator and pushed down to tilt the vehicle forward, thereby preventing the front end of the vehicle body 1 from lifting up too much when the vehicle body 1 crosses a step such as a ridge, or conversely, helping the front end to point upward at the beginning of crossing the ridge.

[0028] As shown in FIG. 1, the lower end of the front handle 5 is pivotally supported on the vehicle body 1 by a pivot shaft 56 .

[0029] The HST lever 17 can operate the speed change section of the HST 31, and the forward and backward movement of the HST lever 17 can be realized.

[0030] A center mascot 89 is attached to the vehicle body 1 on the vehicle body side of the front handle 5, and a lamp 89a is provided.

[0031] In this way, when the vehicle body 1 crosses a ridge in a field, the front of the vehicle body 1 rises, so the operator goes around to the front of the vehicle body 1 and uses the front handle 5. However, if the operator wants to stop the vehicle body 1 while using the front handle 5, the engine start / stop switch is located on the top surface of the steering post 14, so the operator can operate the engine start / stop switch 90 from the front of the vehicle body 1, and it is possible to stop the vehicle body 1.

[0032] 2 is a perspective view seen from the front of the vehicle body 1. A slow-speed forward movement lever 8 is attached to the aforementioned inverted U-shaped loop front handle 5 for crossing riverbanks, which is provided on the front side of the vehicle body 1. Here, the slow-speed forward movement lever 8 is located inside the loop of the loop-shaped front handle 5, and is attached in a position that does not extend forward beyond the front surface 5a1 of the handle portion 5a of the front handle 5, nor does it protrude rearward beyond the rear surface 5a2.

[0033] By using such a size and arrangement, if a person is caught between the vehicle body 1 and an obstacle behind it when operating the slow speed forward lever 8 with the front handle 5 raised, and the slow speed forward lever 8 protrudes beyond the front or rear surface of the handle portion 5a of the front handle 5, there is a risk that the slow speed forward lever 8 will mechanically lock and the vehicle body 1 will not be able to stop moving forward; however, this problem can be solved with the above-mentioned configuration.

[0034] Figure 3 shows the operation panel 13, which is mounted on the top surface of the steering post 14 below the steering handle 16. A left turn indicator 36L is located on the left of the front-to-rear center, and a right turn indicator 36R is located on the right. On the left side of these indicators are an out-of-fertilizer lamp 39 and a clogged-fertilizer lamp 40, and to the right of these is an alarm 38 that lights up and sounds a buzzer to warn the operator when the operator, sitting in the operator's seat 20, operates the main shift lever 17 to change gears without fastening his / her seat belt.

[0035] 5 and 6 show a seat belt 33 that secures an operator seated in the cockpit 20 to the vehicle body 1, with a seat belt pull-out portion 33A provided on the frame of the vehicle body 1 on the left side of the cockpit 20 and a seat belt lock portion 33B provided on the frame of the vehicle body 1 on the right side of the cockpit 20, which tightens and secures the thighs of the operator seated in the cockpit 20. Note that this seat belt lock portion 33B is preferably unlocked to allow the operator to escape from the cockpit 20 if the vehicle body 1 tilts significantly.

[0036] 4 is a control block diagram that controls the operation of the alarm 38, with the control unit 133 receiving as input signals a lock signal for the seat belt 33 from the belt lock sensor 52, a signal that the operator is seated from the seat sensor 53, a clutch input signal for the slow speed forward lever 8 from the slow speed forward sensor 54, a clutch input signal for the main shift lever 17 from the travel clutch sensor 55, the travel speed of the vehicle body 1 from a travel speed sensor 60 also known as a speedometer, and an operation signal for the parking brake from the parking brake sensor 61. The control unit 133 then outputs a seating warning such as an alarm sound or a warning light to the alarm 38.

[0037] The seating warning from the alarm 38 is output when the driver sits in the driver's seat 20 and starts driving by engaging the clutch with the main shift lever 17 without fastening the seat belt 33. However, when the clutch is engaged with the slow forward lever 8, the vehicle 1 starts driving, but no warning is output from the alarm 38. Note that no warning is output when the driving clutch is disengaged by operating the sub-shift lever 26.

[0038] Furthermore, if the traveling speed detected by the traveling speed sensor 60 is extremely low, no alarm will be output from the alarm 38 even if the clutch is engaged using the main shift lever 17 without fastening the seat belt 33.

[0039] When the supply of seedlings or fertilizer runs out, the vehicle can be stopped and the seat belt 33 unlocked, making it easier for the worker to move on to the next task.

[0040] In addition, when the speed change operation of the main speed change lever 17 is restricted during seedling transplanting work, the seat sensor 53 can detect that the operator is seated and the belt lock sensor 52 can detect that the seat belt 33 is locked, and the speed change restriction can be released. [Explanation of symbols]

[0041] 1 car body 8 Slow forward lever 13Operation panel 16 Steering Wheel 20 cockpits 33 Seatbelt 33A seat belt outlet 33B seat belt lock 38 alarm 61 Parking brake sensor

Claims

1. This driving device for a passenger work vehicle is characterized in that an alarm (38) outputs a seated warning when the main speed change lever (17) is operated to the traveling side while the operator is seated in the driver's seat (20) without fastening the seat belt (33), and the seated warning is not output when the operator drives the vehicle using a slow forward speed lever (8) operated while walking.

2. 2. The control device for a riding work vehicle according to claim 1, characterized in that an alarm (38) for outputting a seating alarm is provided on an operation panel (13) below a steering handle (16) provided in front of the driver's seat (20).

3. 2. The steering device for a passenger work vehicle according to claim 1, wherein a seat belt pull-out portion (33A) is attached to the vehicle body (1) on the left side of a driver's seat (20) provided on the engine cover (18), and a seat belt (33) is provided between the seat belt pull-out portion (33A) and a seat belt lock portion (33B) provided on the vehicle body (1) on the right side of the driver's seat (20) to hold and restrain a worker sitting in the driver's seat (20).

4. 2. A steering device for a passenger work vehicle according to claim 1, wherein the driving speed sensor (60) does not activate the alarm (38) when the vehicle is traveling at an extremely low speed, even if the seat belt (33) is not fastened.

5. 4. A steering device for a passenger work vehicle according to claim 3, wherein the parking brake sensor (61) detects a parking operation and unlocks the seat belt locking section (33B) after a predetermined time has elapsed since the detection.

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