JPH0118687B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a steering device for a self-propelled riding working machine such as a transplanter, and an object of the present invention is to enable steering wheels to be operated by legs.

For example, in a self-propelled riding transplanter, an operator must remove the seedlings from the seedling box and place them on the conveyor of the seedling feeder. Therefore, in the past, as shown in Japanese Patent Application Laid-Open No. 56-48804, left and right foot pedals are linked to the steering wheel, and one foot pedal is pushed and moved by the foot. The steering wheel is rotated about a vertical axis to perform a steering operation.

With conventional steering devices like this, although the operator can place both feet on the foot pedals, both feet must make a pushing motion, so the fulcrum is only the butt above the driver's seat. However, the stability was poor, steering operation was difficult, and the vehicle was easily tiring.

The present invention solves the problems of the conventional device, and is characterized by having left and right steering wheels that are interlocked and connected, and left and right footrests that can be placed from the driver's seat. In self-propelled riding work machines,
A steering arm is provided on at least one of the left and right steering wheels to rotate the wheel about a substantially vertical axis, and the free end of this steering arm extends approximately above the corresponding footrest. The main feature lies in that it is extended and a leg engaging portion is formed.

In the present invention, foot means below the ankle, and leg means from the ankle to the thigh, mainly the shin and knee.The knee is the most suitable for operating the steering arm. and its vicinity.

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

1 to 3, reference numeral 1 denotes a traveling working machine, exemplified by a transplanter, which has a pair of left and right steering wheels 2 on its front side, and a pair of left and right drive wheels 3 on its rear side.
are rotatably supported around the horizontal axes of the respective axles 4 and 5.

Reference numeral 6 denotes a fuselage frame that is rectangular in plan view, and a driver's seat 7 is mounted on the driving wheel 3 side of the fuselage 6.

Reference numeral 8 denotes an engine, and a transmission case 9 is extended and fixed at the center of the vehicle width at the rear end of the fuselage 6 in an upwardly sloped manner, and the engine 8 is mounted on a mounting table 10 that is extended and fixed to the rear of the transmission case 9. 11 is its fuel tank.

A gear transmission (not shown) is built into the transmission case 9, and the gear transmission and the engine 8 are interlocked via a wrapped transmission body 12.
3 is a transmission case of the wrapped transmission body 12, which connects the side wall of the gear transmission case 9 and the side wall of the engine 8.

The output side of the gear transmission in the gear transmission case 9 is a pair of left and right horizontal shafts 14, and a pair of left and right auxiliary transmission cases 15, which are swingable about the horizontal shafts 14 as fulcrums and have built-in winding transmission bodies, descend from the rear. installed in an inclined manner,
The axle 5 is pivotally supported at the bottom of each sub-transmission case 15 in an outwardly projecting manner.

Reference numeral 16 designates a main clutch, which in this example is a tension clutch that can tension and release the wrapped transmission body 12, and has a horizontal pivot pin 1 on the fixed side as shown in FIG.
A tension pulley 19 is rotatably provided on a tension arm 18 which is pivotally connected via a tension arm 7, and a tension spring 20 urges the winding transmission body 12 in the tensioning direction.

21 is a brake that controls the gear transmission, and 22 is a brake cam lever thereof.

Reference numeral 23 denotes a drive wheel lifting device, which includes a fixed guide plate 24 provided behind the driver's seat 7, an operating lever 25 that can be freely engaged with and fixed to the guide plate 24, and an operating lever 25 that operates in conjunction with the operating lever 25. It consists of an interlocking rod 26 etc. which is pivotally connected to the pair of left and right sub-transmission cases 15,
By operating the operating lever 25 in the front-back direction, the pair of left and right drive wheels 3 can be raised and lowered in opposite directions about the horizontal shaft 14, and the raised and lowered positions can be fixed by engaging the operating lever 25 with the guide plate 24. It is said that

Reference numeral 27 denotes a support frame for the steering wheels 2, which is fixed to the front part of the fuselage 6. Cylindrical bodies 28 are respectively fixed to the left and right ends of the support frame 27. A wheel mounting shaft 29 is inserted and supported so as to be rotatable about a substantially vertical axis and freely adjustable and fixed in the height direction, and the steering wheel 2 is connected to a 2 or holder 30 connected to the lower part of the wheel mounting shaft 29 via the axle 4. are rotatably supported, and the steering wheel 2 is of a caster type.

A tie rod 31 is pivotally connected between arms 32 protruding from a pair of left and right bifurcated holders 30, and preferably has a turnbuckle structure so that it can be expanded and contracted. The pair of left and right steering wheels 2 are interlocked and connected by this tie rod 31.

Reference numeral 33 designates a pair of left and right footrests, which are formed by a horizontal bar 33b protruding outward from a bracket 33a welded to the side surface of the fuselage 6. A clutch pedal 34 is pivotally supported on the left horizontal bar 33b, and the right side A brake pedal 35 is pivotally supported on the rod 33b.

The left and right footrests 33 are fixed to the machine body 6, and are in a position where an operator seated in the driver's seat 7 can rest his or her feet with his or her knees slightly bent. However, the bracket 33a may be configured to be adjustable in its longitudinal position relative to the body 6.

The clutch pedal 34 and the tension arm 18 of the main clutch 16 are interlocked and connected via a Bowden wire 43, and the clutch pedal 34 can be depressed while the heel of the foot C is placed on the left footrest 33.

The brake pedal 37 is connected to the cam lever 22 of the brake 21 via a Bowden wire 46, and is configured so that the brake 21 can be operated by stepping on it with the foot C placed on the right footrest 33.

A holder 36 formed of a cylindrical body is fitted and fixed to the upper part of the left wheel mounting shaft 29.
Set arm 3 in two radially outward directions from the outer peripheral surface of 6.
7 and 38 are provided protrudingly.

Each of the setting arms 37 and 38 has a two-pronged restriction portion 37a and 38a that opens upwardly at its free end.
7 is arranged slightly outward from the immediate rear, and the setting arm 38 is arranged substantially immediately outward.

The holder 36 also includes setting arms 37, 3.
A rotating body 39 is rotatably fitted in a position above 8, with its vertical position being restricted, and a bracket 39a is provided on this rotating body 39, and this bracket 39a
A steering arm 40 is rotatably supported around a horizontal axis via a pin 39b.

The steering arm 40 has one end of a bar 40a pivotally supported by a pin 39b, and one end of a pipe material 40b bent in a square shape is telescopically fitted to the other end of a bar material 40a. It is formed by welding a circular arc member 40c forming a leg engaging portion 41 to the end. Bar material 4
A plurality of holes 40d are formed in 0a, and a concentric hole 40e and a screw hole 49f are formed in the pipe material 40b, and a bolt 40g is inserted into the hole 40e and any hole 40d and screwed into the screw hole 40f. Cage, hole 40d
By selecting the length of the steering arm 40, the length of the steering arm 40 can be adjusted.

The steering arm 40 is connected to the wheel mounting shaft 29 and the pin 39b.
It is freely rotatable approximately horizontally and vertically about
It can be freely engaged and detached from the two-pronged regulating portions 37a and 38a.

As shown in FIGS. 1 to 3, the steering arm 4
0 is engaged with the bifurcated restricting portion 37a of the setting arm 37, the leg engaging portion 41 at the free end engages with the left foot rest portion 33.
The operator's leg D, which is placed above the left foot rest part 33, is placed in a position where it can be engaged, and mainly the knee of the leg D is engaged with the leg engaging part 41. By swinging left and right, the steering arm 40 is rotated, and the wheel mounting shaft 29 is rotated via the setting arm 37.
The steering wheels 2 are rotated in the same direction as the legs D and operated in the opposite direction. This is the posture of the steering arm 40 during work.

When the steering arm 40 is rotated upward from the above position around the pin 39b, rotated outward around the wheel mounting shaft 29, and rotated downward around the pin 39b, the result is as shown by the imaginary line in FIG. , the setting arm 38 is engaged with the bifurcated restricting portion 38a. As a result, the steering arm 40 protrudes outward from the body 6, and the wheel mounting shaft 29 and the steering wheel 2 can be rotated and steered via the setting arm 38.

This posture of the steering arm 40 is for when it is not working, and when the operator is driving on the road etc.
When it is not possible to carry out the steering operation by riding on the machine, the operator accompanies the side of the transplanter 1 and manually operates the steering arm 40 to perform the steering operation.

FIG. 4 shows a modification of the steering arm 40, in which a pipe material 40b is screwed onto a bar material 40a, and its length can be adjusted by moving the pipe material 40b forward and backward, and by means of a lock nut 42. Rotation has been stopped.

FIG. 5 shows a modification of the mounting portion of the steering arm 40, in which two pipes 44a and 44b are welded to the holder 36 in the radially outward direction, and both pipes 44a and 44b are welded to the holder 36 in the radially outward direction.
4a, 44b can insert the end of the steering arm 40, and a circumferential groove 45a or a recess is formed in the end, and by inserting into each pipe 44a, 44b and screwing the butterfly bolt 45b, It is configured to be prevented from coming off.

The pipe 44a is used for ride steering, and by inserting and fixing the steering arm 40, the steering arm 40
is in a position where it can be operated with the legs D of the driver seated in the driver's seat 7, and the pipe 44b is for steering the vehicle out of the vehicle, and by removing the steering arm 40 from the pipe 44a and replacing it, the vehicle can steer the vehicle in getting out of the vehicle. Become.

FIG. 6 shows a second embodiment of the present invention, in which a support arm 71 is provided protruding from the cylindrical body 28 toward the rear outside.
A midway portion of the steering arm 40' is pivoted to the rear of the support arm 71 via a pin 72 so as to be rotatable in the horizontal direction, while a lever 73 is fitted and fixed to the wheel mounting shaft 29. Free end and steering arm 4
The front end of 0' is pivotally connected via a pin 74 and an elongated hole.

In this second embodiment, the steering arm 40' is only capable of steering for getting on the vehicle, and cannot be used for steering for getting out of the vehicle.
Since the steering direction is the same as that of the steering wheel 2 through 0', the steering feeling is good and the operation is easy.

The present invention is not limited to the above-described embodiments and modifications; for example, the steering arm 40 may be directly fixed to the wheel mounting shaft 29, or the steering arms 40 may be arranged in pairs on the left and right sides. , when a pair of left and right steering arms 40 is arranged, the leg engaging portions 41
The pipe material 40b is not formed by the circular arc member 40c.
Alternatively, it may be formed in a shape that abuts one side of each of the left and right legs D using only a straight bar.

In addition, in the figure, 47 is a trencher, 48 is a planting device, and 49 is a soil covering device. Behind the trenching device 47 is a planting device 48, and behind both sides of the planting device 48 is a soil covering device 49. A ring 50 is provided.

That is, a transplant frame 52 is provided extending rearward so as to be swingable about a horizontal shaft 51 at the front end of the lower abdomen of the body 6, and an elastic supporting body 53 is provided between the rear part of the transplant frame 52 and the body 6, and the transplant is performed. The frame 52 is urged in the direction of ground contact.

A pair of right and left soil covering rings 50 are rotatably supported on the transplant frame 52 via an inclined horizontal shaft 54 so that the opposing spacing on the ground contact side is narrow and the opposing spacing on the non-ground contact side is wide. A planting disk 55 and a planting arm 56 are rotatably provided in front of the inclined horizontal shaft 54 via a horizontal horizontal shaft 57, and the inclined horizontal shaft 54 and the horizontal horizontal shaft 57 are interlocked and connected by a wrapping body. The planting device 48 can be driven.

Reference numeral 58 denotes a seedling supply device, which is located in front of the driver's seat 7 and includes a first conveyor 59 that feeds the seedlings A horizontally and also holds and conveys them vertically;
It consists of a second conveyor 60, etc., which clamps and conveys the seedlings from the seedlings to the planting device 48, and in this embodiment, the horizontal horizontal shaft 57 and a pair of left and right bevel gear transmission bodies 61 are interlocked by a winding transmission body 62. The second conveyor 60 and the like can be driven via the bevel gear transmission body 61 in synchronization with the planting operation.

Further, reference numeral 63 denotes a manual handle, which is provided in a forward-protruding manner on the steering wheel support frame 27 and is located between the steering wheels 2, and which is connected to the clutch 16 and the handle via a Bowden wire 65 by operating a hand lever 64 (not shown). The brake 21 can be operated.

Reference numeral 66 denotes a manual clutch operating lever, which is located on one side of the driver's seat 7 and is connected to a Bowden wire 67 and a spring 68.
The clutch 16 can be operated via. Also, 6
9 indicates a seedling box mounting stand.

According to the present invention described in detail above, the steering arm 40 for rotating the wheel mounting shaft 29 of at least one of the steering wheels 2 is provided, and the free end of the steering arm 40 is connected to the corresponding footrest. 33 and has a leg engaging portion 41 at its free end, so that an operator seated in the driver's seat 7 can place the legs D on the footrest 33 and The steering arm 40 can be rotated by engaging with the leg engaging portion 41, and since the buttocks and both legs C are in a fixed posture, it is extremely easy to swing the leg D from side to side. Steering operation can be performed stably and easily, and fatigue is also reduced.

[Brief explanation of drawings]

1 to 3 show an embodiment of the present invention, FIG. 1 is an overall side view of the transplanter, FIG. 2 is an overall plan view of the transplanter, and FIG. 3 is a main part of the steering device. 4 is a perspective view showing a modification of the steering arm; FIG. 5 is a perspective view showing a modification of the mounting of the steering arm; FIG. 6 is a perspective view showing a second embodiment of the present invention. FIG. 3 is a perspective view of main parts. 1... Traveling work machine, 2... Steering wheel, 3... Drive wheel,
6... Airframe, 7... Driver's seat, 27... Steering wheel support frame,
29...Wheel mounting shaft, 31...Tie rod, 33...Foot rest, 37...Setting arm, 40...Steering arm, 4
1... Leg engaging portion, C... Leg, D... Leg.

Claims (1)

[Claims] 1 Interlockingly connected left and right steering wheels 2 and driver's seat 7
In a self-propelled riding work machine having left and right footrests 33 that can be used to place feet, a steering arm is provided on at least one wheel mounting shaft 29 of the left and right steering wheels 2 to rotate the wheel about a substantially vertical axis. 40 is provided, and the free end of this steering arm 40 extends substantially above the corresponding footrest 33 and is connected to the leg engaging portion 41.
A steering device for a self-propelled riding work machine, characterized in that: