CN101528024A - Combine - Google Patents

Abstract

The invention provides a technique improving operator's visibility downward in front of a combine with operability and workability of the combine maintained. A steering handle (11) is formed in a substantially U-shape in a plan view, and the front ends of the steering handle (11) are placed on both left and right sides above a front cover (30). The front cover (30) is split into upper and lower portions. In a side view, the lower cover (31) is substantially vertically raised and the upper cover (32) is tilted rearward. In a plan view, a left end portion of the front cover (30) is curved toward the rear and the front end of the steering handle (11) is placed at a position on a plane extended forward from the upper cover (32).

Description

combine harvester

technical field

The present invention relates to combine harvester technology, and specifically relates to a technique for improving the visibility of the front and bottom of a combine harvester.

Background technique

In the past, this kind of combine harvester has been widely used and known. In the combine harvester, a steering column is erected at the front approximately central part of the running platform, a steering handle is provided on the top of the steering column, and a front cover covering the front side of the steering column is provided. cover. This technique is disclosed in Patent Document 1, for example.

According to the prior art, the operability of the combine harvester is improved by constituting the steering device with the steering handle, and at the same time, by constituting the front part of the running table with the steering column and the front cover, the body is compactly constituted, and it is possible to prevent the harvesting of grains caused by harvesting. Mud and the like flying out of the stalk pollute the operator's feet, so it contributes to the realization of a comfortable working environment and the improvement of workability.

Patent Document 1: (Japanese) Unexamined Patent Publication No. 2000-135022

Contents of the invention

The problem to be solved by the invention

When cutting rice with a combine harvester, it is often aligned to the row while viewing the grass dividing board closest to the driver's seat (i.e., the farthest right). However, in recent years, the cutting section has become compact and the overall length has become shorter The grass-distributing board is near the driver's seat side, and the steering handle or the front cover become obstacles to the field of vision, so the problem of poor visibility of the grass-distributing board has arisen in the prior art.

Therefore, this invention aims at providing the technique which improved the visibility of the front lower part of the combine while maintaining improved operability and workability in the prior art in view of such present conditions.

means of solving problems

The problems to be solved by the present invention are as above, and the means for solving the problems will be described next.

The present invention makes the shape of the operation operation part along the shape of the line that connects the eyes of the operator sitting on the driver's seat with the grass dividing board in front of the driver's seat, so as to improve the position as the operation operation part ahead of the combine harvester. The visibility of the distribution board of the device.

That is, in the combine harvester related to the present invention, the steering column is erected at the front left and right approximate center of the operation operation part, the steering handle is provided on the upper surface of the steering column, and the front cover covering the front side of the steering column is provided. , characterized in that the steering handle is formed into a substantially U-shaped planar view, and the front end of the steering handle is arranged above the left and right sides of the front cover.

Moreover, in the combine harvester which concerns on this invention, a steering column is erected at the front left and right approximate center part of an operation operation part, a steering handle is provided on the upper surface of this steering column, and the front cover which covers the front side of this steering column is provided at the same time. , characterized in that the front cover is divided up and down, and the lower cover is formed to be erected substantially vertically in side view, the upper cover is inclined rearward, and the left end of the front cover is formed by bending backward in plan view.

Moreover, in the combine harvester which concerns on this invention, a steering column is erected at the front left and right approximate center part of an operation operation part, a steering handle is provided on the upper surface of this steering column, and the front cover which covers the front side of this steering column is provided at the same time. , characterized in that the steering handle is formed into a substantially U-shaped planar view, the front end of the steering handle is arranged above the left and right sides of the front cover and the front cover is divided up and down, and it is configured to be vertically erected in a side view. In the lower cover, the upper cover is inclined rearward, and the left end portion of the front cover is formed by bending rearward in plan view, and the front end of the steering handle is arranged on the front extension of the upper front cover.

Invention effect

As effects of the present invention, the following effects can be obtained.

In the combine harvester according to the present invention, since the range where the operator's field of vision is blocked by the steering handle is reduced, the operator can easily see the nearest (rightmost) side of the driver's seat while sitting on the driver's seat side) sub-grass board. Moreover, workability can be improved by this.

In addition, in the combine harvester according to the present invention, since the range of the operator's field of view blocked by the front cover is reduced, the operator can easily view the nearest ( The far right) divides the grass board. Moreover, workability can be improved by this.

In addition, in the combine harvester according to the present invention, since the range where the operator's field of vision is blocked by the steering handle or the front cover is reduced, the operator can easily recognize the nearest driver's seat while sitting on the driver's seat. The (far right) dividing board. Moreover, workability can be improved by this.

Description of drawings

Fig. 1 is a left side view showing the overall structure of a combine using a front cover according to an embodiment of the present invention.

It is a right side view which shows the whole structure of the combine which used the front cover which concerns on one Example of this invention.

It is a plan view which shows the whole structure of the combine which used the front cover which concerns on one Example of this invention.

4 is a perspective view showing the whole of an upper cover constituting the front cover according to the present invention.

5 is a front view showing the whole of an upper cover constituting the front cover according to the present invention.

6 is a plan view showing the whole of an upper cover constituting the front cover according to the present invention.

Fig. 7 is a side view showing the whole of an upper cover constituting the front cover according to the present invention.

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

Fig. 9 is a front view showing a steering handle according to an embodiment of the present invention.

Fig. 10 is a plan view showing a steering handle according to an embodiment of the present invention.

Fig. 11 is a side view showing a steering handle according to an embodiment of the present invention.

Fig. 12 is a rear view showing a steering handle according to an embodiment of the present invention.

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

Fig. 14 is a schematic plan view showing the relationship between the right grass dividing board and the operator's line of sight.

Symbol Description

11 steering handle, 30 front cover, 31 lower cover, 32 upper cover

Detailed ways

Next, embodiments of the invention will be described.

Fig. 1 is a left side view showing the overall structure of a combine using a front cover according to an embodiment of the present invention.

It is a right side view which shows the whole structure of the combine which used the front cover which concerns on one Example of this invention.

It is a plan view which shows the whole structure of the combine which used the front cover which concerns on one Example of this invention.

4 is a perspective view showing the whole of an upper cover constituting the front cover according to the present invention.

5 is a front view showing the whole of an upper cover constituting the front cover according to the present invention.

6 is a plan view showing the whole of an upper cover constituting the front cover according to the present invention.

Fig. 7 is a side view showing the whole of an upper cover constituting the front cover according to the present invention.

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

Fig. 9 is a front view showing a steering handle according to an embodiment of the present invention.

Fig. 10 is a plan view showing a steering handle according to an embodiment of the present invention.

Fig. 11 is a side view showing a steering handle according to an embodiment of the present invention.

Fig. 12 is a rear view showing a steering handle according to an embodiment of the present invention.

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

Fig. 14 is a schematic plan view showing the relationship between the right grass dividing board and the operator's line of sight.

[Overall configuration of combine harvester 1]

First, the whole structure of the combine harvester 1 represented by the harvester using the front cover 30 which concerns on this invention is demonstrated using FIGS. 1-3.

As shown in FIGS. 1 to 3 , a combine harvester 1 supports a body frame 2 with left and right crawler-type traveling devices 3, 3, and drives the two crawler-type traveling devices 3, 3 by an engine mounted on the body frame 2, thereby constituting energy. Travel forward or backward. The front portion of the body frame 2 can be set up and down to reap the grain stalk and transport it to the reaping part 4 of the body rear. The threshing part 5 which performs threshing, and the sorting part 6 which sorts the grain threshed by this threshing part 5. Behind the threshing part 5, the grass discharge processing part 7 which discharges the waste grass threshed by the threshing part 5 out of the machine is provided.

In addition, on the rear right side of the body frame 2, a grain bin 8 for storing the grains transported by the grain lifting cylinder from the sorting part 6 is provided, and the grain bin 8 is arranged from the rear to the upper side. The grain in the grain bin 8 is discharged to the discharge screw conveyor 18 outside the body. In front of the grain silo 8, on the right front portion of the body frame 2, an operating device composed of a steering handle 11, various operating levers including a discharge clutch lever described later, and an operation operating portion with a driver's seat 12 are provided. 15. An engine and a transmission are arranged below the operation operation part 15.

[Operation Operation Unit 15]

Next, the operation operation unit 15 will be described with reference to FIGS. 1 to 3 or 13 .

The front cover 30 is provided in front of the steering column 9 erected on the front portion of the operation operation portion 15, and is a lower portion extending upward from the front end portion of the floor portion 10 under the driver's seat 12 toward the vicinity of the upper and lower centers of the steering column 9. The cover 31 and the upper end portion of the lower cover 31 are constituted by an upper cover 32 that is gently tilted upward and rearward in a side view.

The lower cover 31 is formed in a substantially "U" shape that opens rearward in a plan view, and the upper cover 32 is formed at its lower end in accordance with the cross-sectional shape of the lower cover 31, and forms a gently curved shape as it extends upward. Section shape.

Here, the driver's seat 12 is constituted by a seat part 12a and a backrest part 12b, and the driver's seat 12 is provided from the front and rear approximately central part of the operation operation part 15 to the rear, and from the left side of the driver's seat 12 to the left side of the steering column 9, the side The column 16 is erected at the left end of the floor portion 10 . In addition, the upper surface of the side column 16 is set at substantially the same height as the seat portion 12a in side view, and the main shift lever, auxiliary shift lever, working clutch lever, etc. are arranged on the upper surface of the side pillar 16, and further, on the side The front part and the front part are provided with a side wall part 17 formed in a substantially "ㄑ" shape in plan view, and a side panel, a display panel, a handle, etc. are installed on the side wall part.

The side wall portion 17 forms an inclined surface descending toward the driver's seat 12 side, so that the operator sitting on the driver's seat 12 can easily see the side panel and the display panel. And, the right front end of side wall part 17 extends toward described upper cover 32, on the extension line of the curve drawn on the upper part of this side wall part 17, connects the left upper part of this upper part cover 32, forms side wall part 17 and upper part. The shape in which the cover 32 is connected improves the appearance design.

On the right side of the operation operation part 15 , an opening is formed from approximately the center to the front, that is, between the driver's seat 12 and the steering column 9 , and serves as an opening for the operator to ride on the operation operation part 15 .

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

The upper part of the upper cover 32 constituting the front cover 30 has a shape in which the left and right central parts are gradually recessed downward in an arc shape, and a handle part 33 is erected at the right end (upper and lower mouth side) of the upper part.

In addition, the left and right end portions of the upper cover 32 are formed in a shape curved rearward in a plan view. In other words, when the operator sits on the driver's seat 12 and sees the right dividing board 13, the line of sight is not blocked by the upper cover 32. As shown in FIG. The eyes of the operator sitting on the driver's seat 12 and the shape of the line Q of the right dividing grass board 13 are protruded forward as much as possible to expand the leg room and improve the livability. Thereby, visibility is improved.

In addition, the front surface of the right side of the upper cover 32 is made to be able to visually recognize the side grain divider extending from the right grass dividing board 13 to the right rear, and it is easy to make the middle division and the like.

That is, the front cover 30 is divided up and down, the lower cover 31 is erected approximately vertically in a side view, the upper cover 32 is inclined rearward, and the left end of the front cover 30 is curved rearward in a planar view.

As a result, since the operator's line of sight is reduced by the front cover 30, the operator can easily visually recognize the (rightmost) right side grass that is closest to the driver's seat 12 while sitting on the driver's seat 12. plate 13. In addition, thereby, workability can be improved.

The grip portion 33 is composed of a substantially cylindrical grip portion 33a extending in the left-right direction and a support member 33b connecting the grip portion 33a and the main body portion 34, and these members 33a, 33b, 34 are integrally formed of thermosetting resin or the like. , so the number of components is reduced and the economy is good.

In addition, as will be described later, when the operator sits on the operation operation part 15, although a large bending stress occurs at the connection part between the support member 33b and the main body part 34, since these parts 33a, 33b, 34 are integrally formed, it is possible to Increase rigidity to this stress.

Here, the grip portion 33a is arranged so as to provide a sufficient gap below the steering handle 11. In addition, as shown in FIG. nearby.

Therefore, for example, in operating the combine harvester 1, when the body posture is changed due to accidental lateral deflection, etc., the right hand can be changed from the steering handle 11 to the grip 33a in an emergency, so that the body posture can be adjusted. During unstable operations such as rotating operations or ridge-riding operations, the steering handle 11 can be manipulated with the left hand while maintaining the steering posture by grasping the grip portion 33a. In addition, when operating the steering handle 11 with the right hand, the left hand grasps the grip provided on the side wall portion 17 to support the body.

On the front and rear surfaces of the grip 33a, a plurality of concave parts (may also be convex parts) 35, 35 ... arranged in the left-right direction have an elliptical shape extending longitudinally, and the operator passes along the concave parts 35, 35. .. Put your fingers on, and you can easily grip the grip portion 33a at an appropriate position without slipping.

By having such a shape, the handle portion 33 is provided on the right side of the upper end portion of the upper cover 32, that is, toward the upper and lower opening sides of the driver's seat 12, so that the operator can hold the unstable steering handle when sitting on the operation operation portion 15. 11, etc. regardless of weight, by holding the grip portion 33a of the grip portion 33, a stable riding posture can be maintained, and the steering handle 11 can be changed immediately while bending over on the driver's seat 12.

In addition, as mentioned above, the handle portion 33 is necessary when sitting in the operation operation portion 15, and is limitedly arranged on the right side of the upper end portion of the upper cover 32, so it does not hinder the front and lower sides of the combine harvester 1. The presence of the grip portion 33 can be instantly recognized when going up and down.

Furthermore, 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 holds it with his hand in order to sit in the driver's seat, it is easy to hold it in his hand familiarly. On the front and rear sides of the upper cover 32, by providing a plurality of concave parts 35, 35..., the operator can hold the grip part 33a from two directions obliquely front or obliquely rearward of the upper cover 32, and ride on the vehicle while maintaining a stable posture. Driver's seat 12.

[Steering handle 11]

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

The steering handle 11 is composed of a grip body 41, a flange member 42, and a support member 43 connecting the two members 41, 42. These members 41, 42, 43 are made of a polyurethane-based resin material wrapped in a core member made of a metal member. Formed in one piece.

The handle main body 41 is formed in a substantially semicircular shape in plan view except for the front portion in the traveling direction, and has protruding portions 41R, 41L protruding left and right at both ends thereof.

That is, the protruding portion 41R on the right side has a shape protruding inwardly (left side) by gently bending the front end thereof, and the upper and lower portions thereof are planar.

In addition, a substantially triangular concave portion 25 is provided on the front upper portion of the protruding portion 41R, and a plate indicating the name and operating direction of the operation switch 21 to be described later is attached to the rear portion thereof.

On the upper surface of the extension portion 41R, behind the above-mentioned concave portion 25 , there is provided a substantially rectangular concave portion 44 that is stepped down one step further, and the operation switch 21 is provided in this concave portion 44 .

Here, the operation switch 21 is, for example, a switch for performing operations such as raising and lowering for harvesting or fine adjustment of the direction, and the operating switch 21 for raising and lowering for harvesting is provided in this embodiment. In addition, this operation switch 21 is comprised by the neutral return switch which can be operated easily with fingertips, but it is not limited to a toggle switch, a toggle switch, a multi-directional switch, etc. The operation direction of the operation switch 21 of the present embodiment coincides with the operation direction of the thumb so as to be easy to operate with the thumb when the operator grips the grip body 41 of the steering handle 11 , for example. That is, it is the wiring direction of the thumb position in the gripped state. Therefore, the operator can safely operate the combine harvester in the state of gripping the handle main body 41 of the steering handle 11 without greatly changing the body posture and without putting pressure on the thumb.

On the rear outer side (right side) of the extension portion 41R, an extension portion 22 having a substantially rectangular shape and gradually extending rearward is provided, and its upper and lower surfaces form a planar shape. In addition, a rectangular concave portion 24 is provided on the upper surface of the extension portion 22 .

Further, behind the protruding portion 41R, protrusions (or recesses) 23 , 23 , 23 protruding from the lower surface of the grip body 41 toward the inner (left) side are provided side by side in the front-rear direction.

The projecting portion 41L on the left protrudes toward the left and right sides, slightly inward (right side) while protruding with a great circle, and the upper and lower surfaces of the projecting portion 41L form a plane. In addition, a recessed portion 45 is provided on the upper surface of the overhanging portion 41L approximately leftward (inwardly) from the center. Furthermore, similarly to the protruding portion 41R, behind the protruding portion 41L, convex portions 23, 23, 23 protruding from the lower surface of the handle main body 41 toward the inner (right side) side are provided side by side in the front-rear direction. .

By forming the grip body 41 in such a shape, the operator can put his or her fingers in the gaps between the plurality of protrusions 23, 23... provided on the left and right when holding the grip body 41 of the steering handle 11. , the handle body 41 can be held at an appropriate position, and while slipping can be prevented, by placing the The thumb can hold the handle body 41 firmly.

Here, when comparing the front-rear positional relationship between the projecting portion 41R and the projecting portion 41L, it is provided that one of the projecting portions 41R is frontward. That is, in the steering handle 11 , the grip body 41 has a substantially semicircular shape in plan view excluding the front portion in the traveling direction, and the right end thereof is formed to extend forward from the left end.

In other words, the left end portion of the steering handle 11 is formed shorter than the right end portion, and has the advantage of reducing the range of the field of vision in the front and lower left direction of the operator as much as possible.

That is, the steering handle 11 is configured to have 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 ).

Thereby, since the operator's line of sight is reduced by the range covered by the steering handle, the operator can easily see the right dividing board 13 closest to the driver's seat 12 (rightmost) when sitting in the driver's seat 12. . In addition, thereby, workability can be improved.

In a small (two blades or three blades) combine harvester 1, the reaping part 4 is usually arranged on the left side of the body, and the operation operation part 15 is arranged on the right side of the body. Therefore, in a normal harvesting operation, the machine body advances to successively harvest uncut grain stalks around the left side.

At this time, the right grass dividing plate 13 located at the right front lower part of the reaping part 4 is consistent with the root of the uncut grain bar between the rows or the right side to reap, but by making the handle body 41 of the steering handle 11 form the handle body 41 of this embodiment The shape improves the visibility near the right dividing grass board 13, and makes the cutting part 4 easy to overlap in an appropriate position for the row, so there is no worry about the situation of missing cutting.

The flange member 42 is formed into an upright cylindrical shape, and nuts and the like are incorporated therein, and is attached to the steering shaft. The flange member 42 and the handle body 41 are connected by a supporting member 43 . The support member 43 is substantially T-shaped in plan view and substantially L-shaped in side view. That is, the connecting portion 43 a extends forward from the left and right center of the supporting member 43 , and is fixed to the rear surface of the flange member 42 . In addition, the left and right sides of the support members 43 and 43 are connected to the rear lower surface of the handle body 41 .

The supporting member 43 extends obliquely upward while being gently bent outward from the rear left and right side surfaces of the connecting portion 43 a , and is connected to the lower surface of the handle body 41 .

Here, the place where the support member 43 is connected to the lower surface of the handle body 41 is arranged near the rear of the handle body 41 in plan view. A grip of a predetermined length is formed between the support member 43 and the support member 43 . That is, as shown in FIG. 10 , the grip portion is set to have a dimension X (right side) and a dimension Y (left side) that are slightly larger than the width of an adult's hand.

With such a configuration, the operator can easily hold the handle body 41 of the steering handle 11 at an appropriate position, and prevent the support member 43 from becoming an obstacle even if the operator holds other inappropriate parts.

In addition, the rear of the grip body 41 forms a gently (with a large radius of curvature) arc shape inclined forward between the two joints with the two support members 43, 43, which can fully ensure the driver's seat. 12 and the steering handle 11, because the operator is open above the thigh even if he is sitting in the driver's seat 12, so once he stands up to the side of the steering handle 11 or obliquely rearward, there is no need to turn the driver's seat 11. The driver's seat 12 can be easily boarded while entering the seat portion and the like while holding the body.

In addition, in order to rotate and operate the steering handle 11, the operator pulls one end forward and pulls the other end backward. At this time, even if one side of the hand slips forward due to the situation, the protruding part will not block it. In addition, due to the obstruction of the support member 43, there is no need to worry about the hand that wants to pull in slipping backward by mistake.

Next, the relationship between the line of sight of the operator and each part of the body will be described with reference to FIG. 13 or FIG. 14 .

As shown in Figure 13, in the past, since the line of sight was blocked by the steering handle 11 front end, if it is the sight line represented by the line P in Figure 13, the right parting grass board 13 cannot be seen, and the right parting grass board 13 is visually recognized. The operator must stand on the floor portion 10 at this time.

As shown in Figure 13, in this regard, if the steering handle 11 and the front cover 30 shapes shown in this embodiment are made, in the right side view, the operator's line of sight when watching the right grass dividing board 13 can become as shown in Figure 13 With the line of sight indicated by line Q, it can be confirmed that the line of sight will not be blocked by the steering handle 11 or the upper cover 32, and the right dividing board 13 can be easily seen when the operator sits on the driver's seat 12.

In addition, as shown in FIG. 14, if the steering handle 11 and the shape of the front cover 30 shown in this embodiment are made, in plan view, the operator's line of sight when looking at the right grass dividing board 13 is the line R in FIG. In the line of sight shown, it can be confirmed that the line of sight is not blocked by the steering handle 11 or the upper cover 32 , and the operator can easily see the right dividing board 13 while sitting on the driver's seat 12 .

That is, by forming the steering handle 11 in a substantially U-shape in plan view, disposing the front end of the steering handle 11 above the left and right sides of the front cover 30, and dividing the front cover 30 up and down, the lower cover is substantially vertically erected in a side view. 31, the upper cover 32 is inclined to the rear, and the left end portion of the front cover 30 is formed by bending backward in plan view, and the front end of the steering handle 11 is configured on the extension of the front of the upper cover 32, thereby reducing the number of operators. The line of sight is covered by the steering handle 11 or the front cover 30. In this way, when the operator is sitting in the driver's seat 12, he can easily see the right part closest to the driver's seat 12 (that is, the farthest right). Grass board13. In addition, thereby, workability can be improved.

As above, the steering column 9 is erected at the front left and right approximately central part of the operation operation part 15, the steering handle 11 is provided on the upper surface of the steering column 9, and the combine has a front cover 30 covering the front side of the steering column 9. The vehicle is characterized in that the steering handle 11 is substantially U-shaped in plan view, and the front end of the steering handle 11 is arranged above the left and right vehicle sides of the front cover 30 .

According to such a configuration, since the range where the operator's line of sight is blocked by the steering handle 11 is reduced, the operator can easily visually recognize the part closest to the driver's seat 12 (rightmost) in the state of sitting on the driver's seat 12. Grass board13. In addition, thereby, workability can be improved.

In addition, the steering column 9 is erected at the front left and right approximately central part of the operation operation part 15, the steering column 9 has a steering handle 11 on the upper surface of the steering column 9, and the combine harvester has a front cover 30 covering the front side of the steering column 9. Among them, it is characterized in that the front cover 30 is divided up and down, and the lower cover 31 is configured to be erected approximately vertically in side view, the upper cover 32 is inclined rearward, and the left side of the front cover 30 is formed by bending backward in plan view. side end.

According to such a configuration, since the range where the operator's line of sight is blocked by the front cover 30 is reduced, the operator can easily visually recognize the part closest to the driver's seat 12 (rightmost) in the state of sitting on the driver's seat 12. Grass board13. In addition, thereby, workability can be improved.

In addition, the steering column 9 is erected at the front left and right approximately central part of the operation operation part 15, the steering column 9 has a steering handle 11 on the upper surface of the steering column 9, and the combine harvester has a front cover 30 covering the front side of the steering column 9. Among them, it is characterized in that the steering handle 11 is formed into a substantially U-shaped plan view, and the front end of the steering handle 11 is arranged above the left and right sides of the front cover 30 and the front cover 30 is divided up and down. The lower cover 31 is erected approximately vertically in a side view, the upper cover 32 is inclined rearward, and the left end of the front cover 30 is formed by bending backward in a planar view. The front end of the above-mentioned steering handle 11 is arranged.

According to such a configuration, since the range where the operator's line of sight is blocked by the steering handle 11 or the front cover 30 is reduced, the operator can easily visually recognize the driver's seat 12 closest to the driver's seat 12 (rightmost side) divide the grass board 13. In addition, thereby, workability can be improved.

In addition, the steering handle 11 is composed of a substantially semicircular shape except for the front portion in the traveling direction in plan view, and is formed by extending the right end portion forward from the left end portion.

According to such a configuration, by forming the shape of the steering handle 11 from a substantially semicircular shape except for the front portion in the traveling direction, the operator can ensure sufficient visibility of the front lower portion while sitting on the driver's seat 12. By making the right end portion of the steering handle 11 extend forward compared to the left end portion, it is possible to improve the visibility of the substantially central portion of the work vehicle, that is, to the driver's seat 12, especially on the lower left side of the front, and it is easy to carry out the harvesting work. counterpoint.

In addition, protrusions 41R, 41L protruding left and right are respectively provided at both front ends of the steering handle 11 , and recesses 24 , 45 are arranged at upper ends of the protrusions 41R ( 22 ), 41L.

According to such a structure, since the extension parts 41R, 41L which protrude left and right are respectively provided in the front end part of the said steering handle 11, the operator's hand will not slip out even when operating. That is, in order to rotate the steering handle 11, one end is pulled forward, and the other end is pulled in backward. At this time, even if one hand slips forward, the protruding parts 41R and 41L are blocked. Will not slip off.

In addition, by arranging the recesses 24, 45 on the upper ends of the protrusions 41R (22), 41L, the operator can firmly hold the steering handle 11 by placing his thumbs in the recesses 24, 45 when holding the steering handle 11. Steering handle 11.

In addition, in front of the protruding portions 41R and 41L of the steering handle 11 , a plurality of convex portions 23 arranged in a row in the front-rear direction are arranged from the bottom toward the inner side.

According to such a configuration, by arranging a plurality of protrusions 23 aligned in the front-rear direction from the bottom toward the inner side in front of the protrusions 41R, 41L of the steering handle 11, the operator can place the gaps between the protrusions 23 Holding the steering handle 11 at an appropriate position as a guide maintains an appropriate steering posture, thereby improving operability when the work vehicle is turned.

In addition, in the concave portion 44 on the protruding portion 41R of the steering handle 11, the operation switch 21 for operating the working mechanism is arranged so that the operation direction of the operation switch 21 is the same as the operating direction of the thumb holding the steering handle 11. unanimous.

According to such a structure, by arranging the operation switch 21 for operating the operation mechanism in the concave portion 44 on the protruding portion 41R of the steering handle 11, the operation direction of the operation switch 21 is aligned with the direction of holding the steering handle 11. The action directions of the thumbs are consistent, and the operator can easily operate the working mechanism with the thumb while keeping the steering handle 11 firmly grasped, so the operation vehicle can be operated safely without greatly damaging the steering posture.

In addition, the front cover 30 erected on the front part of the driver's seat 12 as the front of the steering column 9 provided on the handle shaft of the steering handle 11 pivotally supports the steering handle 11 is at the upper end of the front cover 30 facing the driver's seat 12 . On the upper and lower mouth sides, the front cover 30 is integrally formed with a handle portion 33 protruding substantially upward.

According to such a structure, since the grip portion 33 provided at the upper end portion of the front cover 30 is disposed on the upper and lower opening sides of the driver's seat 12, the operator can easily grasp the grip portion 33 by hand when getting into the driver's seat 12. , In addition, by integrally forming the handle portion 33 with the front cover 30, it is economical because the number of parts is reduced, and the rigidity against the bending stress generated at the base of the handle portion 33 can be improved. In addition, the grip portion 33 may also be formed in an inverted U shape, but it may be made into a hook by projecting upward in a convex shape, and may be hung on a handle of a handbag or the like.

In addition, at the upper end portion of the grip portion 33, a substantially cylindrical grip portion 33a protruding in the left-right direction is provided.

According to such a configuration, by providing a substantially cylindrical grip portion 33a protruding in the left-right direction on the upper end portion of the grip portion 33, when the operator holds the driver's seat 12 with his hands, it is easy to familiarize himself with the handle. In the hand, it will not disrupt the riding posture.

In addition, a plurality of concave portions 35 arranged in the left-right direction are arranged on the front and rear side surfaces of the grip portion 33a.

According to such a structure, by disposing a plurality of recesses 35 aligned in the left-right direction on the front and rear side surfaces of the grip 33a, the operator can hold the grip at an appropriate position by using the plurality of recesses 35 as a guide. Grip 33a, so you can maintain a proper riding posture. In addition, by providing the plurality of recesses 35 on the front and rear side surfaces, the operator can sit on the driver's seat 12 by holding the grip 33 a from both obliquely front or obliquely rear sides of the front cover 30 .

Possibility of industrial use

The present invention relates to a combine harvester technology, and more specifically, relates to a technique for improving the visibility of the front and bottom of a combine harvester, and can be widely applied to agricultural applications.

Claims (3)

1. A combine harvester, in which a steering column is erected at the front, left, and right sides of the operation operation part, a steering handle is provided on the top of the steering column, and a front cover covering the front side of the steering column is provided, and it is characterized in that The steering handle is substantially U-shaped in plan view, and the front end of the steering handle is arranged above the left and right sides of the front cover. 2. A combine harvester in which a steering column is erected at the front, left, and right sides of the operation operation part, a steering handle is provided on the steering column, and a front cover covering the front side of the steering column is provided, and it is characterized in that, The front cover is divided up and down, and the lower cover is erected approximately vertically in side view, the upper cover is inclined rearward, and the left end portion of the front cover is formed by bending rearward in planar view. 3. A combine harvester in which a steering column is erected at the front, left, and right sides of the operation operation part, a steering handle is provided on the steering column, and a front cover covering the front side of the steering column is provided, and it is characterized in that, The steering handle is substantially U-shaped in plan view, the front end of the steering handle is arranged above the left and right sides of the front cover and the front cover is divided into upper and lower parts, and the lower cover is vertically erected in a side view, so that The upper cover is inclined rearward, and the left end portion of the front cover is bent rearward in a planar view, and the front end of the steering handle is arranged on the front extension of the upper front cover.

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