WO2008050493A1

WO2008050493A1 - Steering handle and work vehicle having it

Info

Publication number: WO2008050493A1
Application number: PCT/JP2007/053072
Authority: WO
Inventors: Shigeki Murata; Syouichi Satou
Original assignee: Yanmar Co., Ltd.
Priority date: 2006-10-24
Filing date: 2007-02-20
Publication date: 2008-05-02
Also published as: CN101528528A; CN101528528B; JP5053618B2; KR20090073232A; KR101340826B1; JP2008104390A

Abstract

A steering handle for steering a work vehicle that is capable of changing the course of the vehicle body and has a such a structure that an operator can sufficiently observe the forward lower portion of the work vehicle and can easily and firmly grip the handle at a proper position. The steering handle (11) is formed in a generally semicircular shape having the removed forward portion in the advancing direction when viewed from top. In molding the steering handle, the right end thereof is extended forward more than the left end.

Description

Specification

Steering wheel, handle and work vehicle equipped with the steering wheel

Technical field

TECHNICAL FIELD [0001] The present invention relates to a steering wheel handle that steers a course of a vehicle body of a work vehicle and a technology of a work vehicle including the steering handle.

Background art

Conventionally, as a handle structure for steering a work vehicle, there has been provided a steering handle consisting of a grip portion formed in an annular shape, and the operator is not particularly aware of the work vehicle in general. It is possible to turn the body of the work vehicle with the same feeling as holding the steering wheel of a passenger car.

[0003] Here, in a work vehicle represented by a combine or the like, unlike a general passenger car or the like, while sitting on a seat and running the aircraft, the lower cutting part is visually observed, and the grain of the field It is necessary to check the flow of uncut parts and harvested crops, but the front part of the steering hinders the line of sight, and the operator greatly collapses the steering posture, It was necessary to get up and work.

[0004] In addition, the work vehicle has a structure in which a space for installing a driver's seat can be stored in a space-saving manner in order to make the entire body more compact. For this reason, a steering wheel, a driver's seat, etc. are arranged in a limited space so that the rear part of the steering wheel is positioned above the thigh when the operator is seated in the driver's seat. It is in place. As a result, when the operator is seated in the driver's seat, it is necessary to stand up to the side of the steering or to the back of the steering, and then move into the seat while twisting the body. There was troublesome boarding work.

[0005] The structure of the steering handle described in “Patent Document 1” for improving such a situation is known.

Patent Document 1: Japanese Patent Laid-Open No. 2000-308409

[0006] According to the above-mentioned "Patent Document 1," a horizontal handle rod that extends horizontally in the left and right directions, and a grip that extends while drawing an arc on the inside by urging forward at both ends of the horizontal handle rod. By configuring the steering handle with the head part, visibility of the lower part of the front of the fuselage can be ensured, and the operator can cut the lower part of the front part while maintaining a natural maneuvering posture that does not cause a `` front turning ''. The part can be visually observed. In addition, since the shape of the rear part of the steering wheel and the handlebar is greatly removed, the upper part of the thigh is opened even when the operator is seated on the seat, and the boarding operation in the driver's seat without the above-mentioned troublesomeness is facilitated. It can be carried out.

[0007] However, in the steering handle, the grip part is provided separately on the left and right sides, so that the hand that is excessively squeezed during the turning operation slips forward, or in a conventional annular shape. Compared to the steering wheel that is formed, the grip range, that is, the range that can actually be tightened by hand, is narrowed. There was a case where I could not grasp it well. Also, due to the compact length of the combine, the weeding board may be difficult to see due to the steering handle and front cover.

Disclosure of the invention

Problems to be solved by the invention

[0008] In the present invention to improve such a point, sufficient visibility of the lower front portion of the work vehicle is ensured in the steering handle for steering the course of the body of the work vehicle. It is a problem to provide a steering handle structure that can be easily gripped at an appropriate position.

Means for solving the problem

[0009] The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

[0010] That is, the steering handle according to the present invention is rotatably disposed on the work vehicle.

In the steering handle for controlling the steering of the work vehicle, the steering handle has a substantially semicircular shape with an opening on the front side of the work vehicle, and the right end of the steering wheel and the handle extends forward relative to the left end. To be molded.

[0011] In the steering handle according to the present invention, the front end portions of the steering handle are respectively provided with protruding portions that swell left and right, and the upper end portion of the protruding portion is recessed. It is intended to place only.

[0012] In the steering handle according to the present invention, a plurality of bulges arranged in the front-rear direction from the lower surface toward the inner side surface are disposed in front of the projecting portion of the steering handle.

[0013] In the steering handle of the present invention, a work switch for operating the work mechanism is disposed in a depression on the upper surface of the protruding part of the steering handle, and the operating direction of the work switch is determined by the thumb that grips the steering handle. It matches the direction of movement.

[0014] The steering handle of the present invention is configured such that the upper end of the work switch does not protrude from the handle body in a side sectional view.

[0015] The steering handle of the present invention is configured such that the grip portion at the rear of the steering handle half behind in the front-rear direction has a large diameter portion at a part of the grip portion.

[0016] The work vehicle according to the present invention includes a front cover that covers a front side of a steering column on which the steering wheel is disposed, and the front end of the steering wheel is located above the left and right sides of the front cover. Is to be placed.

[0017] The work vehicle of the present invention includes a front cover that covers a front side of a steering column on which the steering handle is disposed, and the front cover is divided into upper and lower parts, and the lower cover is viewed in a side view. The upper cover is configured to stand substantially vertically, and the upper cover is inclined rearward, and in a plan view, the left end portion of the front cover is curved toward the rear.

[0018] The work vehicle of the present invention includes a front cover that covers a front side of a steering column on which the steering wheel is disposed, and the front end of the steering wheel is located above both the left and right sides of the front cover. The front cover is divided into upper and lower parts, and the lower cover is erected substantially vertically in a side view, and the upper cover is inclined rearward, and the left end portion of the front cover in a plan view Is curved toward the rear, and the front end of the steering handle is disposed on the front extension of the upper cover.

The invention's effect [0019] As the effects of the present invention, the following effects are obtained.

[0020] In the steering handle of the present invention, the steering handle is disposed on the work vehicle so as to be rotatable, and the steering handle is opened on the front side of the work vehicle, with respect to the steering handle for operating the steering of the work vehicle. This is a semicircular arc shape, and the right end of the steering wheel extends forward and forms compared to the left end, ensuring sufficient visibility of the lower part of the front when the operator is seated in the driver's seat. In addition, the right end portion of the steering handle extends forward compared to the left end portion, and is formed so as to visually recognize the substantially middle portion of the work vehicle, that is, the front lower left side with respect to the driver's seat. Therefore, the position can be easily adjusted when cutting.

[0021] In the steering handle according to the present invention, by forming the protruding portions bulging right and left at the front both ends of the steering handle, the operator's hand does not slip through during steering. That is, in order to turn the steering handle, one end is pulled forward and the other end is pulled backward. At this time, even if the hand on one side tends to slip forward, The part becomes a stopper and does not slip through.

In addition, by arranging a recess at the upper end of the overhanging portion, an operator can attach a thumb to the recess and firmly hold the steering node knob when gripping the steering handle.

[0022] In the steering handle according to the present invention, by arranging a plurality of bulges arranged in the front-rear direction from the lower surface toward the inner side surface in front of the protruding portion of the steering handle, the operator can remove the gap between the bulges. The steering handle can be gripped at an appropriate position using the part as a guide, and the appropriate steering posture can be maintained, so that the operability when turning the work vehicle is improved.

[0023] In the steering handle of the present invention, a work switch for operating the work mechanism is disposed in a depression on the upper surface of the protruding part of the steering handle, and the operating direction of the work switch is determined by the thumb that grips the steering handle. By adjusting to the direction of movement, the operator can easily operate the work mechanism with the thumb while holding the steering handle tightly, so that the operator can safely operate without greatly disturbing the steering posture. Work vehicle Can be operated.

[0024] In the steering handle of the present invention, the upper end of the work switch is configured not to protrude from the handle body in a side sectional view. Even if you do not move your hand to the work lever, operating the work switch while grasping the handle makes it easier to work and improves work responsiveness.

[0025] In the steering handle according to the present invention, the grip part at the rear of the steering wheel half in the front-rear direction has a large-diameter portion at a part of the grip part. Even when the right hand is used to operate the levers described above with the left hand while deciding the position of the right hand, the wrong operation can be prevented if the hand is out of position.

[0026] The work vehicle according to the present invention includes a front cover that covers a front side of a steering column on which the steering wheel is disposed, and the front end of the steering wheel is located above both the left and right sides of the front cover. This reduces the range where the operator's line of sight is blocked by the steering needle, so that the operator can easily access the weeding board closest to the driver's seat (rightmost) while seated in the driver's seat. Can be visually recognized. Thereby, workability | operativity can be improved.

[0027] The work vehicle according to the present invention includes a front cover that covers a front side of a steering column on which the steering handle is disposed, and the front cover is divided into upper and lower parts, and the lower cover is removed in a side view. The upper cover is inclined to the rear, and the upper cover is inclined rearward. In plan view, the left end of the front cover is curved toward the rear so that the operator's line of sight is blocked by the front cover. Since the range that can be used is reduced, the operator can easily see the weed board closest to the driver's seat (rightmost) while seated in the driver's seat. This can also improve workability.

[0028] The work vehicle of the present invention includes a front cover that covers a front side of a steering column on which the steering wheel is disposed, and the front end of the steering wheel is located above both the left and right sides of the front cover. And place the front cover up and down The lower cover is erected substantially vertically in a side view, and the upper cover is inclined rearward in a side view, and the left end portion of the front cover is curved toward the rear in a plan view. By placing the front end of the steering wheel on the front extension of the cover, the range in which the operator's line of sight is blocked by the steering handle and the front cover is reduced, so that the operator sits in the driver's seat and sits in the driver's seat. The nearest (rightmost) weed board is easily visible. In addition, this makes it possible to improve workability.

Brief Description of Drawings

FIG. 1 is a left side view showing an overall configuration of a conoin using a front cover according to an embodiment of the present invention.

[Fig. 2] Right side view.

[Fig. 3] Plan view.

FIG. 4 is a perspective view showing the entire upper cover constituting the front cover according to the present invention.

[Fig. 5] Front view.

[Fig. 6] Plan view.

[Fig. 7] Side view.

FIG. 8 is a perspective view showing a steering handle according to an embodiment of the present invention.

[Fig. 9] Front view.

[Fig. 10] Plan view.

[Fig. 11] Side view.

[Fig. 12] Similarly back view.

FIG. 13 is a schematic right side view showing the relationship between the right weed board and the operator's line of sight.

FIG. 14 is a schematic plan view.

FIG. 15 is an explanatory view of a handle according to the present invention.

FIG. 16 is a comparison diagram of a conventional handle and the handle of the present invention.

FIG. 17 is a cross-sectional view taken along line AA in FIG.

FIG. 18 is a front view explanatory diagram of the driver when sitting on the driving seat of a combine equipped with a conventional handle. Explanation of symbols

[0030] 11 Steering hand nore

21 Operation switch

22 Overhang

23 Swelling

24 depression

25 depression

41 Grip body

41R overhang (grip, middle (right))

41L overhang (grip no, middle (left side))

42 Boss member

43 Support members

44 depression

45 depression

BEST MODE FOR CARRYING OUT THE INVENTION

Next, an embodiment of the invention will be described.

Example 1

[0032] [Combine 1 overall configuration]

First, as a representative of a harvester using the front cover 30 according to the present invention, the overall configuration of the conne 1 will be described with reference to FIGS. 1 to 3.

As shown in FIG. 1 to FIG. 3, the combine 1 supports the machine frame 2 with the left and right crawler type traveling devices 3 3, and the engine has both the crawler type traveling devices 3 3 mounted on the body frame 2. It is configured to be able to travel forward or backward by being driven by the vehicle. At the front of the fuselage frame 2, there is a reaping part 4 that cuts and transports the cereals and transports it to the rear of the fuselage, and on the left side of the fuselage frame 2 threshs the harvested cereal from the reaping part 4. A threshing unit 5 and a sorting unit 6 for sorting the grains threshed by the threshing unit 5 are arranged up and down. Behind the threshing unit 5, there is provided a slaughter processing unit 7 for discharging the sewage after threshing by the threshing unit 5 to the outside of the machine. [0034] Further, on the right rear part of the machine body frame 2, there is provided a drain tank 8 for storing the grains conveyed from the sorting section 6 by the milling cylinder, and the drain tank 8 over the rear force of the grain tank 8 is provided. A discharge auger 18 is provided for discharging the grain inside the machine body. In front of the Darren tank 8, on the right front part of the fuselage frame 2, there is a powerful operation device such as a steering handle 11 and various operation levers including a discharge clutch lever described later, and a driving operation section 15 having a driver's seat 12. In addition, an engine and a transmission are disposed below the operation unit 15.

[0035] [Operation unit 15]

Next, the driving operation unit 15 will be described with reference to FIG. 1 to FIG. 3 or FIG. The front cover 30 is provided in front of the steering column 9 erected on the front of the driving operation unit 15, and the front end portion of the floor 10 on the lower surface of the driver's seat 12 is also near the upper and lower centers of the steering column 9. A lower cover 31 provided extending upward with a directional force, and an upper cover 32 provided with the upper end force of the lower cover 31 also provided with an upward force in a side view and gently inclined backward. It is configured. A steering wheel 11 is connected to the steering column 9 and is disposed on the steering column 9.

[0036] The lower cover 31 is formed in a substantially "U" shape that opens rearward in a plan view, and the upper cover 32 has a cross-sectional shape of the lower cover 31 at the lower end thereof. The cross-sectional shape is formed so as to be gradually curved as it is formed and is extended upward.

[0037] Here, the driver's seat 12 is composed of a seat 12a and a backrest 12b, and a driver's seat 12 is provided from the front / rear approximate center of the driver's operating portion 15 to the rear. To the left side of the steering column 9, a side column 16 is erected on the left end of the floor 10. Further, the upper surface of the side column 16 is provided at substantially the same height as the seat 12a in a side view, and a main transmission lever, a sub transmission lever, a work clutch lever, and the like are arranged on the upper surface of the side column 16. Further, a side wall portion 17 formed in a substantially “<” shape in plan view is provided on the side portion and the front portion, and a side panel, a display panel, a grip, and the like are assembled to the side wall portion.

[0038] The side wall portion 17 is formed with an inclined surface that is directed downward toward the driver's seat 12 side. The seated operator can easily see the side panel and display panel.

. The right front end of the side wall portion 17 extends toward the upper cover 32, and the left upper surface portion of the upper cover 32 is connected to an extended line of a curve drawn by the upper surface portion of the side wall portion 17 so that the side wall portion 17 The design is improved by forming the portion 17 and the upper cover 32 into a continuous shape.

[0039] On the other hand, the right side of the driving operation unit 15 is an opening from approximately the center to the front, that is, between the driver's seat 12 and the steering column 9, and when the operator gets on and off the driving operation unit 15, It becomes the mouth.

[0040] The front cover 30 according to the present invention will be described with reference to FIGS. Here, the arrow A shown in FIG. 4, FIG. 6, and FIG. 7 indicates the front in the traveling direction, and the left and right front-rear directions are determined according to the direction of the arrow A.

The upper surface portion of the upper cover 32 constituting the front cover 30 has a left and right central portion that is gently depressed downward in an arc shape, and a drip portion 33 on the right end (entrance side) of the upper surface portion. Is erected.

[0041] In plan view, the left and right ends of the upper cover 32 are formed in a shape that curves backward. In other words, the upper cover 32 is provided on the left side of the upper cover 32 so that the line of sight is not obstructed by the upper cover 32 when the operator views the right weed board 13 while sitting on the driver's seat 12. The front is shaped along the line Q connecting the eyes of the operator seated in the driver's seat 12 as shown in Fig. 13 and the right weed board 13 and is inflated as far forward as possible to widen the foot space and enhance the comfort. In addition, it is formed so as to be located below and behind the line Q, thereby improving visibility.

In addition, the front surface on the right side of the upper cover 32 is designed so that a side divider extending to the right rear side from the right weed board 13 can be visually recognized, so that it can be easily divided.

[0042] That is, the front cover 30 is divided into upper and lower parts, and the lower cover 31 is erected substantially vertically in the side view, and the upper cover 32 is inclined rearward, and the left side of the front cover 30 in the plan view. It is set as the structure which curves and forms an edge part toward back.

[0043] This reduces the range in which the operator's line of sight is blocked by the front cover 30, so that the operator is closest to the driver's seat 12 in the state of being seated on the driver's seat 12 (rightmost). The right weed board 13 can be easily seen. This also improves workability.

[0044] The grip portion 33 includes a substantially cylindrical grip portion 33a extending in the left-right direction, and a support member 33b that connects the grip portion 33a and the main body portion 34. These members 33a'33b Since '34 is formed integrally with thermosetting resin, etc., the number of parts is reduced and it is economically superior.

Also, as described later, when the operator gets into the operation section 15, the force that generates a large bending stress at the connection between the support member 33b and the main body 34. These members 33a'33b As a result, the rigidity against the stress can be increased.

[0045] Here, the grip portion 33a is disposed below the steering handle 11 with a sufficient gap, and as shown in FIG. 6, the grip portion 33a is viewed from above in the plan view. It is located near the right hand grip of

For this reason, for example, if you suddenly receive a lateral shake during the operation of combine 1 and your posture is lost, you can move your right hand from the steering handle 11 to the grip 33a to prepare your posture. In addition, when performing unstable work such as turning of the fuselage or crossing the heel, the steering handle 11 can be steered with the left hand while the grip 33a is held tightly to maintain the steering posture. When steering the steering needle 11 with the right hand, the left hand holds the grip provided on the side wall portion 17 to support the body.

[0046] On both front and rear side portions of the grip portion 33a, a plurality of depressions (which may be bulges) arranged in the left-right direction are arranged with an elliptical shape extending vertically. The operator can easily grip the grip portion 33a at an appropriate position without slipping by putting his / her finger along the recess 35 · 35 ···.

[0047] With this shape, the grip portion 33 is provided on the right side of the upper end portion of the upper cover 32, that is, on the entrance / exit side to the driver's seat 12, so that the operator gets into the driving operation portion 15. In this case, it is possible to maintain a stable riding posture by holding the grip part 33a of the grip part 33 that holds the unstable steering wheel handle 11 etc. At the same time as sitting down at 12, it can be switched to the steering needle 11 immediately. [0048] Further, as described above, the grip portion 33 is provided only on the right side of the upper end portion of the upper cover 32, which is necessary when getting into the driving operation portion 15. In addition, the presence of the grip portion 33 can be visually recognized at the time of getting on and off.

[0049] Further, since the grip portion 33a of the grip portion 33 is formed in a substantially cylindrical shape extending in the left-right direction, when the operator grasps with his hand to get into the driver's seat, the grip portion 33a is familiar with the hand and is easy to grip. As described above, by providing a plurality of depressions 35 · 35 ··· at both the front and rear side portions of the grip portion 33a, the operator can operate the grip portion 33a from both the diagonally forward and diagonal directions of the upper cover 32. You can board the driver's seat 12 while holding a stable position.

[0050] [Steering handle 11]

Next, details of the steering handle 11 according to the present invention will be described with reference to FIGS. Here, the arrow A shown in FIG. 8 and FIGS. 10 to 12 indicates the front in the traveling direction, and the left and right front-rear directions are determined according to the direction of the arrow A.

[0051] The steering handle 11 includes a grip body 41, a boss member 42, and a support member 43 that connects both the members 41 and 42. The members 41, 42, and 43 enclose a core member that is formed of a metal member. It is integrally formed of urethane-based grease.

[0052] The grip body 41 is formed in a substantially semicircular shape with the front portion in the traveling direction removed in plan view, and projecting portions 41R'41L that swell left and right are provided at both ends thereof.

In other words, the right overhanging portion 41R has a shape in which the tip portion is gently curved and bulges toward the inner side (left side), and the upper and lower surface portions thereof are planar. Further, a depression 25 having a substantially triangular shape is provided on the front upper surface portion of the overhanging portion 41R, and a name plate indicating the name and operating direction of an operation switch 21 to be described later is attached to the rear portion.

[0053] On the upper surface portion of the overhanging portion 41R, a substantially rectangular recess 44 is provided at the rear of the recess 25, and an operation switch 21 is provided in the recess 44.

Here, the operation switch 21 is, for example, a switch for performing operations such as cutting lifting and lowering and steering fine adjustment. In this embodiment, an operation switch 21 for raising and lowering the cutting is provided. The operation switch 21 is a neutral return switch that can be easily operated with a fingertip! /, But is not limited to a toggle switch, a sea source switch, a multi-directional switch, or the like. The operation direction of the operation switch 21 of the present embodiment is adjusted to the direction of movement of the thumb so that the operator can easily operate with the thumb while the operator grips the grip body 41 of the steering handle 11. ing. That is, the tangential direction at the thumb position when grasped. Accordingly, the operator can safely perform the combine operation without greatly losing his / her posture, stress applied to the thumb, and the grip body 41 of the steering handle 11 being clamped.

[0055] On the rear outer side (right side) of the overhanging portion 41R, an overhanging portion 22 having a substantially rectangular shape and extending gently rearward is provided, and the upper and lower surface portions thereof are planar. Further, a rectangular recess 24 is provided on the upper surface portion of the overhang portion 22.

[0056] Further, on the rear side of the overhanging portion 41R, a bulge (which may be a dent) extending from the lower surface of the grip body 41 toward the inner side (left side) is provided in the front-rear direction. It is provided in parallel.

[0057] The left overhanging portion 41L is bulging slightly toward the inside (right side) by applying force to the left and right sides, and the upper and lower surfaces of the overhanging portion 41L are flat. In addition, a recess 45 is provided on the upper surface of the overhanging portion 41L substantially to the left (inside) from the center. Further, as in the case of the overhanging portion 41R, bulges 23, 23, and 23 that extend from the lower surface of the grip body 41 toward the inside (right) side surface are provided in parallel in the front-rear direction behind the overhanging portion 41L. Being

[0058] By forming the grip body 41 in such a shape, when the operator grips the grip body 41 of the steering handle 11, the gaps between the plurality of bulging portions 23 provided on the left and right are provided. The grip body 41 can be gripped at an appropriate position with a finger attached to the part, and slipping can be prevented, and at the same time, depressions provided on the upper surface parts of the overhanging part 41L and the overhanging part 22 By attaching a thumb to 24, the grip body 41 can be firmly held.

[0059] Here, when comparing the front-rear positional relationship between the overhanging portion 41R and the overhanging portion 41L The overhanging portion 41R is provided in front. That is, in the steering handle 11, the grip body 41 has a substantially semicircular shape in which the front portion in the traveling direction is removed in plan view, and the right end portion is formed to extend forward as compared with the left end portion. In other words, the left end portion of the steering handle 11 is formed shorter than the right end portion, and has a shape that has the advantage of minimizing the range that obstructs the view of the operator in the lower left direction. .

That is, the steering handle 11 is formed in a substantially U shape in plan view, and the front end of the steering handle 11 is arranged above the left and right sides of the front cover 30 (upper cover 32).

As a result, the range in which the operator's line of sight is blocked by the steering handle is reduced, so that the operator is seated on the driver's seat 12 and the right weed board 13 closest to the driver's seat 12 (the rightmost) is removed. It can be easily visually recognized. In addition, this makes it possible to improve workability.

[0061] In a small-sized (two-row, three-row) combine 1, the mowing unit 4 is usually arranged on the left side of the aircraft and the operation unit 15 is arranged on the right side of the aircraft. Therefore, in normal harvesting operations, the aircraft will sequentially harvest uncut cereals around the left.

At this time, the right weed plate 13 provided at the lower right front part of the cutting part 4 is the power to cut the right weed plate 13 according to the stock of the uncut sorghum on the right side or the right side. The grip body 41 of the steering wheel 11 is By doing so, the visibility in the vicinity of the right weed board 13 is improved, and it becomes easy to properly position the cutting part 4 with respect to the strip, so there is no fear of generating uncut leaves.

[0062] The boss member 42 has an upright cylindrical shape, and a nut or the like is incorporated therein so that the boss member 42 can be assembled to the steering shaft. The boss member 42 and the grip body 41 are connected by a support member 43. The support member 43 has a substantially T shape in plan view and a substantially L shape in side view. That is, the connecting portion 43a is extended forward from the left and right center of the support member 43 and fixed to the rear surface of the boss member 42. The left and right sides of the support members 43 and 43 are connected to the lower surface of the rear portion of the grip body 41. [0063] The support member 43 extends obliquely upward from the left and right side surfaces of the rear portion of the connecting portion 43a toward the both sides and extends obliquely upward, and is connected to the lower surface of the grip body 41.

Here, the portion where the support member 43 is connected to the lower surface of the grip body 41 is disposed in the vicinity of the rear portion of the grip body 41 in a plan view. A grip portion having a predetermined length is formed between 41R′41L and the support member 43. In other words, as shown in Fig. 10, the grip portion is set to have dimensions X (right side) and Y (left side) that are slightly larger than the width of an adult's hand.

[0065] With this configuration, when the operator grips the grip body 41 of the steering handle 11, the operator can easily grip the grip body 41 at an appropriate position. The support member 43 becomes an obstacle and can be prevented.

[0066] The rear side of the grip body 41 has a gentle arc shape (large radius of curvature) that is distorted forward between the connection points of the two support members 43 and 43. The space between the driver's seat 12 and the steering wheel 11 can be sufficiently secured, and the upper part of the thigh is opened even when the operator is seated on the driver's seat 12, so that the side of the steering wheel 11 can be It is possible to easily perform the boarding operation to the driver's seat 12 without standing up to the side or obliquely backward and then entering the seat portion while twisting the body.

[0067] In addition, in order for the operator to turn the steering handle 11, the one end is pulled forward and the other end is pulled backward. At this time, one hand moves forward with excessive force. Even if it tries to slip through, the overhanging portion does not slide out as a stopper, and the support member 43 prevents the hand trying to pull in accidentally slipping backward.

Next, the relationship between the operator's line of sight and each part of the airframe will be described with reference to FIG. 13 or FIG.

Conventionally, as shown in FIG. 13, since the line of sight is blocked by the front end of the steering handle 11, the right weed board 13 cannot be seen without the line of sight indicated by line P in FIG. When viewing the grass board 13, the operator must stand up on the floor 10 inevitably.

On the other hand, if the shape of the steering handle 11 and the front cover 30 shown in the present embodiment is used as shown in FIG. 13, the operator inserts the right weed board 13 in the right side view. The line of sight at the time of viewing can be the line of sight indicated by line Q in FIG. 13, and an operator whose line of sight is not blocked by the steering handle 11 or the upper cover 32 is seated in the driver's seat 12. It can be confirmed that the right weed board 13 is easily visible.

[0069] If the shape of the steering handle 11 and the front cover 30 shown in this embodiment as shown in FIG. 14 is used, the line of sight when the operator gazes at the right weed board 13 in plan view is An operator whose line of sight is indicated by a line R in FIG. 14 and is not obstructed by the steering handle 11 or the upper force bar 32 can easily see the right weed board 13 while sitting on the driver's seat 12. I can confirm that.

That is, the steering handle 11 is formed in a substantially U shape in plan view, the front end portion of the steering handle 11 is disposed above both the left and right sides of the front cover 30, and the front cover 30 is divided into upper and lower parts. In the side view, the lower cover 31 is erected substantially vertically, and the upper cover 32 is inclined rearward. In the plan view, the left end of the front cover 30 is curved toward the rear, and By arranging the front end of the steering wheel 11 on the front extension of the upper cover 32, the range in which the operator's line of sight is blocked by the steering wheel 11 and the front cover 30 is reduced. The right weed board 13 closest to the driver's seat 12 (that is, the rightmost side) can be easily seen while sitting on the seat 12. In addition, this makes it possible to improve workability.

Example 2

Next, the structure of a steering handle according to another embodiment of the present invention will be described with reference to FIGS.

[0072] Since the conventional rotary steering wheel and handle have a substantially circular shape, the driver can sit on the driver's seat and look at the cutting part in front of the driver while working. When confirming the uncut part of cereal grains and the flow of harvested crops, the round handle is located in front of the driver's line of sight, which obstructs the view and makes it difficult to work.

Specifically, when turning counterclockwise, as shown in FIG. 18, depending on the height and posture of the driver, turning the conventional round steering wheel 11A obstructs the front part of the steering wheel and cuts the front part of the driving part. 4 (Especially right weed board 13) There was a habit.

Especially in the case of a combine, the harvesting unit 4 is usually arranged on the left and the driver's seat 12 is arranged on the right. Uncut cereals that protrude to the right of the weed board will leave behind. In other words, if the right weed board 13 is not visible, there is a risk that uncut cutting will occur.

[0073] Therefore, the present invention is excellent in visibility, and in particular, visually confirms the cutting part (especially the right weed board) in front of the driving part so that a leftover cutting such as cereal can be confirmed when turning left. A steering handle having a structure in which the front part of the steering wheel is removed is provided.

In FIG. 16, a two-dot chain steering handle 11A is a conventional round handle, and a solid steering handle 11 is a steering handle according to the present invention, which are overlapped for comparison. ing. The steering handle 11 according to the present invention is obtained by removing the front portion of the steering handle from the half in the front-rear direction of the steering handle.

Then, as shown in FIG. 15, in the steering handle 11 according to the present invention, the left and right ends of the handle grip part left after removing the handle front part 41 and 41R (in this embodiment, This is a structure in which it protrudes toward the inside of the handle.

[0075] The overhanging portion 41R is provided with a depression 25 on which an operation switch 21 described later is printed with an illustration explaining the switch, a depression 24 on which a finger (for example, a thumb) is placed, and the like.

Further, bulges 50 are formed at the left and right corners of the arc shape from the overhanging portion 41R to the rear portion of the steering handle 11.

That is, a large diameter portion is provided at a part of the grip portion at the grip portion behind the front / rear direction of the steering wheel 11, and the bulge 50, which is the large diameter portion, continuously increases the diameter of the grip portion. It is the part which made the diameter larger.

[0076] As a result, since the front part of the steering handle is removed, the field of view forward, especially the left front lower side when turning left, is widened so that the driver sits on the driver's seat 12. While driving, see the cutting part 4 in front of the driving part 15 (specifically, the right weed board 13), which makes it easier to check the flow of the harvested parts in the most uncut part, which improves work efficiency and safety. is there. In addition, it is provided at the left and right front ends of the steering handle 11, and in this embodiment, 41R.41L force that protrudes to the side Steering handle 11 Has the effect of preventing hand pulling during operation.

Next, the configuration of the overhanging portion will be described.

[0078] Specifically, a flat space is provided in the overhanging portion 41R, a rectangular recess is provided in the space, and an alarm device, a lifting / lowering for cutting and a fine steering adjustment are provided in the recess. An operation switch 21 is provided for operation. At this time, the operation switch 21 is configured so that the upper end of the operation switch 21 does not protrude from the steering handle 11 main body in cross section (see FIG. 17). In this way, the upper end of the operation switch 21 is configured not to protrude when the combine is covered with a cover such as a seat when the combine is kept on the field or the like, and the operation switch 21 protrudes from the upper surface of the handle. This is to avoid the possibility that the operating force switch 21 may be damaged, or that it could be injured or misoperated when holding the part in the case of a heel. .

Further, a depression 25, a line, an arrow, a scale, or the like indicating the effect of the operation switch 21 or the operation method is engraved or printed on the tip surface of the overhanging portion 41R. In the present embodiment, the right overhanging portion 41R is provided with a cutting height adjustment switch that allows the cutting height to be arbitrarily adjusted by raising and lowering the cutting portion by manual operation, and the switch on the tip surface is described. Print illustrations.

In addition, the type or shape of the operation switch 21 may be a knob type, a dial type, a push button type, or the like.

Note that the location of the overhanging portion 41R (the location where the operation switch 21 is installed) is set up other than the handle portion of the steering handle 11 so that the driver does not touch it accidentally when getting into the combine. The operation switch 21 can be installed on either the left or right overhanging portion 41 L · 41R of the steering handle 11. /.

[0079] By arranging the switch as described above, it is possible to hold the handle while gripping the handle, without having to release the handle and move the hand to the work lever on the side column. By operating, work operations can be facilitated and work responsiveness can be improved.

[0080] Further, a recess 45 · 24 for placing a finger (for example, a thumb) on the surface side of the overhanging portion 41L'41R is provided. Each is formed. By placing the thumb there and grabbing the rear force of the steering handle 11 with another finger, the steering handle 11 can be gripped with force.

[0081] Further, as shown in FIGS. 15 and 16, the handle according to the present invention has an arcuate shape at the left and right corners in the grip portion of the steering handle 11 behind the half of the steering handle 11 in the front-rear direction. 50 · 50, that is, the diameter Z1 of the location is configured to be larger than the diameter Z2 of the handle grip at the other location (or the conventional), especially the steering handle 11 Configure to have 50 · 50.

[0082] By configuring as described above, the position of the hand is determined and the handle is operated with the right hand while operating the work lever on the side column 16 with the left hand as compared with the conventional round handle. In some cases, however, if a hand is out of position and the operation is wrong, a mistake in the operation can be prevented.

Claims

The scope of the claims

[1] In a steering handle that is rotatably disposed on a work vehicle and controls the steering of the work vehicle, the steering wheel has a substantially semicircular shape with an opening on the front side of the work vehicle, and the steering wheel Steering handle, characterized in that the right end of the door extends forward compared to the left end.

[2] The steering wheel according to claim 1, wherein a projecting portion that swells to the left and right is provided at both front end portions of the steering handle, and a recess is disposed at an upper end portion of the projecting portion. Dollar.

[3] The steering handle according to claim 1, wherein a plurality of bulges arranged in the front-rear direction are arranged from the lower surface toward the inner side surface in front of the projecting portion of the steering handle.

[4] A work switch for operating the work mechanism is disposed in a depression on the upper surface of the protruding portion of the steering handle, and the operation direction of the work switch is adjusted to the moving direction of the master finger holding the steering handle. The steering handle according to claim 1, wherein the steering handle is characterized in that:

5. The steering handle according to claim 1, wherein the upper end of the work switch is configured not to protrude from the handle body in a side sectional view.

[6] The steering according to any one of [1] to [5], wherein a grip portion at a rear side of a half of the steering noddle in the front-rear direction has a large diameter portion at a part of the grip portion. handle.

[7] In the working vehicle having the steering wheel and the handle according to any one of claims 1 to 6, a front cover that covers a front side of the steering column on which the steering wheel is disposed. And a front end of the steering handle is disposed above the left and right sides of the front cover.

[8] In the working vehicle having the steering wheel and the handle according to any one of claims 1 to 6, a front cover that covers a front side of the steering column on which the steering wheel is disposed. The front cover is divided into upper and lower parts, and the lower cover is erected substantially vertically in a side view, and the upper cover is inclined rearward, and the left end of the front cover in a plan view. It is characterized by forming a curve toward the back Working vehicle.

A work vehicle having the steering handle according to any one of claims 1 to 6, further comprising a front cover that covers a front side of a steering column on which the steering handle is disposed, The front end of the steering handle is located above the left and right sides of the front cover, and the front cover is divided into upper and lower parts, and when viewed from the side, the lower cover is erected substantially vertically and the upper cover is rearward The left end of the front cover is curved toward the rear in plan view, and the front end of the steering handle is disposed on the front extension of the upper force bar. Both.