JP6855158B2 - Walking work machine - Google Patents

Description

The present invention relates to a walk-behind working machine having an increased strength of the handle by crosslinking a pipe between the left and right agricultural walk-behind working machine handle.

The operation levers for shifting gears and clutch operations of a walking type work machine for agriculture are usually provided on the side surface of the machine body, but in a furrow work machine that works in narrow furrows, if the operation lever is provided on the side surface of the machine body. The operating lever or the operating hand may come into contact with the crop or the like, and in order to avoid this, the operating lever is provided between the left and right handles as described in Patent Document 1 below.
In addition, in the work machine for furrows, when moving to another furrow, the tilling work in the rotary is temporarily stopped and the handle is lowered to change the direction while floating the rotary, and at that time, it is lowered. Since the steering wheel gets too close to the ground surface and normal driving becomes impossible, a vertically movable handle that can adjust the steering wheel to a high position is used, and an operation panel for operating the clutch etc. is provided in the middle part of the steering wheel. ..
Therefore, in the furrow working machine, a short operating lever is used so that the operating lever does not come into contact with the reinforcing bridge pipe provided on the front side of the operation panel by raising and lowering the handle.

To operate the short operating lever, put your body between the left and right handles in an attempt to grasp the operating lever, lean forward, extend your arm forward, and grasp the grip of the operating lever in an unnatural posture. You have to move the operation lever up, down, left and right with.
As a result, an unreasonable posture is forced, but in the past, there is a dislike that this unreasonable posture was taken as a matter of course and the inconvenience of operation was not noticed.

JP 2012-143208

The present invention has focused on the inconvenience of operating such a short operating lever, and eliminates the operation of the operating lever provided between the left and right handles that can be moved up and down in an unreasonable posture as described above. It is intended to provide a walking type work machine capable of achieving both reinforcement of a handle.

In order to achieve the above object, the walk-behind work machine of the present invention projects the left and right handles that spread backward to the left and right at the pivotal portion provided in the upper center of the machine body so that the height can be adjusted. and, an operation panel of the front end portion to the left and right handle is positioned substantially intermediate portion of the handle, the walk-behind working machine for agriculture having a control lever backward between the left and right handle, the right and left A bridge pipe having a symmetrical trapezoidal upper shape and a bent portion that bulges rearward is fixed to the base point by welding from a portion close to the front end of the operation panel of the handle of the steering wheel. An operation lever whose length is such that the grip portion is located behind the front end portion of the operation panel and the grip portion does not come into contact with the bridge pipe even if it is moved by adjusting the vertical height of the handle and operating the operation lever vertically and horizontally. It is characterized by being equipped with.

In the invention of claim 2, when the height of the operating lever is raised by adjusting the height of the left and right handles up and down, the grip portion of the operating lever becomes the lower side between the left and right handles and is lowered. Occasionally, the grip portion of the operating lever is set to be on the upper side between the left and right handles.

The invention of claim 3 is characterized in that, in the above invention, the bent portion of the bridge pipe is formed so that the hand holding the grip portion of the operating lever can maintain a distance that does not come into contact with the bridge pipe.

In the invention of claim 4, in the above invention, the engine portion such as the engine and the fuel tank is disposed at the rear portion of the machine body, the cultivated portion such as the rotary is disposed at the front portion of the body, and the bent portion of the bridge pipe is the engine portion. It is characterized in that it is formed so as to avoid the fuel inlet of the fuel tank provided in the upper part of the.

A walking type work machine in which an operation lever facing rearward is provided between the left and right handles whose height can be adjusted up and down, and the left and right handles are equipped with an operation panel whose front end is located approximately in the middle of the handles. A bridge pipe whose both ends are fixed by welding to a portion close to the front end of the front end of the operation panel is formed by bulging a symmetrical trapezoidal upper bent portion toward the rear. It can be made longer than the front end of the operation panel, so the grip part of the operation lever enters between the left and right handles and is close to the driver's hand, so it is possible to operate the lever in a comfortable posture. It was.
At that time, when the height of the handle is adjusted up and down, the grip portion of the operation lever does not come into contact with the bridge pipe, and when the operation lever is operated up, down, left and right, the operation lever touches the bridge pipe. As a result, when the vertical height of the handle is adjusted and the operating lever is operated up, down, left and right, the grip portion of the operating lever does not come into contact with the bridge pipe at any position, and the operating lever is simply operated. Not only does it not interfere with the operation of, but by inserting the body between the left and right handles, the operation lever becomes extremely close to the body, and it is possible to operate the operation lever in a comfortable posture.
That is, it is possible to eliminate the operation of the operation lever between the left and right handles in an unreasonable posture and to reinforce the left and right handles with the bridge pipe.

In addition, since the shape of the bent portion of the bridge pipe is a symmetrical trapezoidal upper shape, the abutting angle of the welded portion can be made larger than in the case of a simple curved shape or an isosceles triangle upper shape. The welding rod can be applied well to the surface to perform high-quality welding, and the left and right handles can be reinforced more strongly.

According to the second aspect of the present invention, when the vertical height is adjusted and the left and right handles are lowered, the grip portion of the operating lever protrudes above the handle and the bridge pipe, so that the grip portion is not disturbed around the grip portion. It can be grasped and the operation lever becomes easy to operate.
Also, when the left and right handles are raised, the grip of the operation lever is hidden below the handle and bridge pipe and guarded by the handle and bridge pipe above it, causing malfunctions such as sudden shifting due to careless operation of the operation lever. It is possible to improve the safety by preventing the above.

According to the third aspect of the present invention, when the grip portion of the operating lever is grasped by hand and operated up, down, left and right, the operating lever can be safely operated with a margin without the hand being pinched or the contact being hindered by opening the bridge pipe. It becomes possible to perform the operation of.

According to the fourth aspect of the present invention, the fuel inlet of the upper fuel tank on the rear side of the airframe can be easily refueled without being obstructed by the upper bridge pipe.

It is a perspective view of this invention. (A) is a side view showing a state in which the handle is lowered, and (b) is a side view showing a state in which the handle is raised and the tillage portion is raised. It is a top view which shows the main part of the shape of a bridge pipe.

An embodiment of the present invention will be described below with reference to the drawings.
The present invention is a walking work machine for agriculture, and there are various types of walking work machines. As shown in FIG. 1, a pair of left and right drive wheels 12 are provided in the lower center of the machine 1, and the front side of the machine 1 is cultivated. A furrow working machine provided with a rotary 15 for use will be described as an example.

As shown in FIGS. 1 and 2, the working machine has an engine portion such as an engine 16 and a fuel tank 10 for supplying fuel to the engine 16 in order to operate the drive wheels 12 and the rotary 15, at the rear portion of the machine body 1. A cultivated portion such as the rotary 15 is arranged in the front part of the machine body 1, and the rotation of the engine is transmitted to the drive wheels 12 provided in the lower center of the machine body via a transmission, and the rotation of the engine 16 Is also transmitted to the rotary 15 of the cultivated portion provided on the front side of the machine body 1 via a mission.
Reference numeral 13 in FIGS. 1 and 2 is a tillage depth adjusting wheel for adjusting the tillage depth of the rotary 15 by moving it up and down, and reference numeral 14 is for guiding the soil scraped up by the rotary 15 to the side and releasing it. It is a rotary cover of.
The working machine for the furrows is operated by holding the handle grips 9 at the rear ends of the left and right handles 3 and 4 with the left and right hands, and is cultivated by the rotary 15 while traveling between the furrows.

Then, the working machine is provided with a pivot portion 2 at the upper center of the machine body 1, and the left and right handles 3 and 4 protruding rearward to the left and right ends are pivotally attached to the pivot portion 2 so as to be rotatable up and down at the base. Near the bases of the handles 3 and 4, a handle height adjusting portion 8 that can be rotated up and down around the pivot portion 2 and fixed at an arbitrary height position is provided.
FIG. 2A shows a state in which the handles 3 and 4 are rotated downward and lowered to near the fuel tank 10, and FIG. 2B shows a state in which the handles 3 and 4 are raised and the tillage portion is raised. ..
Although not shown, the handle height adjusting portion 8 has an adjusting plate having several step holes arranged in a vertical row on a circular curved surface centered on the pivot portion, and is fixed to the vicinity of the bases of the left and right handles 3 and 4. Then, a pin is provided from the inside of the adjusting plate so that the pin can appear and disappear from the inside of the step hole by operating the lever of the operation panel provided on the handle, and the handles 3 and 4 can be moved up and down to pin the step hole at an arbitrary position. It is possible to fix the height position of the handles 3 and 4 by inserting the handle by operating the lever via the wire.

Then, as shown in (a) of FIG. 2, the handle height adjusting unit 8 maximizes the rotary 15 even when the rotary 15 is in contact with the ground, and as shown in (b) of the same figure. Even when the rear part of the fuselage is raised and lowered, the handle grips 9 of the left and right handles 3 and 4 can be gripped and operated normally by rotating the pivot part 2 up and down to change the inclination angle. Set so that
For example, when traveling on a road, as shown in FIG. 2B, the rotary 15 at the front of the machine body is raised so as not to come into contact with the road surface, and the rotary 15 is moved at that time. When raised, the rear side of the machine body is lowered with the drive wheel 12 as a boundary, and the position of the handle grip 9 is lowered. Therefore, by adjusting the handles 3 and 4 to a higher position in advance with the handle height adjusting portion 8, the handle grip 9 is a height that is easy to drive.

Then, the operation of the handle height adjusting portion 8 and the clutch operation of the drive portion are performed between the handle grips 9 at the rear ends of the left and right handles 3 and 4 and the pivot parts 2 of the handles 3 and 4 bases. An operation panel 6 for performing is provided.
On the operation panel 6, a lever for operating the pin infestation operation for the handle height adjusting unit 8 and a lever for operating clutches of various movable parts attached for tilling via wires are moved rearward. The operation panel 6 is provided so as to be as close as possible to the handle grip 9, but if the operation panel 6 is long and large in the front-rear direction, the front end portion 6a of the operation panel 6 reaches approximately intermediate portions 3a and 4a of the handles 3 and 4. It will be.

Further, it is connected to a drive transmission system such as a transmission between the engine 16 and the rotary 15 and the drive wheel 12, and protrudes rearward from between the left and right handles 3 and 4 at the upper center of the airframe 1, and is projected to the tip portion. A grip portion 5a is provided, and an operation lever 5 for operating a shift or the like by moving the grip portion 5a up, down, left and right is provided.
At that time, since the position of the engine part is at the rear part of the machine body 1, the body inserted between the left and right handles 3 and 4 cannot move forward from the engine part, and it becomes difficult to reach the operation lever 5. Therefore, the operation lever 5 is more than the front end portion 6a of the operation panel 6 provided on the left and right handles 3 and 4 so that the grip portion 5a at the tip can be easily operated near the driver's body holding the handle. Use a long metal rod at the rear.
It should be noted that FIGS. 1 and 2 show a mode in which the space between the base portion and the tip portion of the operating lever 5 is bent upward so as to avoid the fuel tank 10 arranged at the rear portion.

Then, a bridge pipe 7 is bridged to the portions 3b and 4b adjacent to each other on the front side of the front end portion 6a of the operation panel 6 of the left and right handles 3 and 4 in order to reinforce the left and right handles 3 and 4, and both end portions 7a, 7b is applied to the side surfaces of the pipes of the handles 3 and 4 and fixed by direct welding.
At that time, the bridge pipe 7 does not come into contact with the grip portion 5a at the tip of the operating lever 5 at all regardless of the vertical position of the handles 3 and 4 and the operating position of the operating lever 5. The bent portion 7c is formed so as to bulge rearward.

As shown in FIG. 1, the shape of the bent portion 7c of the bridge pipe 7 is a trapezoidal upper shape symmetrical to the rear from the base point, with a portion close to the front end of the operation panel of the left and right handles as a mounting base point. At that time, if the bent portion 7c of the trapezoidal upper shape of the bridge pipe 7 is excessively bulged rearward, the strength of the bridge pipe 7 itself decreases, and between the handles 3 and 4. The function as a reinforcing member of the above may not be satisfied. Further, both the left and right sides of the bridge pipe 7 may be tilted upward, and the attachment angle to the handles 3 and 4 may become extremely small, which may make welding very difficult.
Further, the left and right sides of the bridge pipe 7 may hit the inner portion of the operation panel 6, and the bridge pipe 7 may not be attached.
Therefore, the degree of swelling of the bridge pipe 7 to the rear must be determined in consideration of the strength of the handle reinforcing material, the ease of welding, the positional relationship with the operation panel 6, and the like.

On top of that, when the vertical height of the handles 3 and 4 is adjusted and the operation lever 5 is operated up, down, left and right by the bent portion 7c of the bridge pipe 7 formed in a trapezoidal upper shape that bulges rearward. The grip portion 5a of the operating lever 5 does not come into contact with the bridge pipe 7, and not only does not interfere with the operation of the operating lever 5, but also the position where the grip portion 5a is in contact with the bridge pipe 7 between the left and right handles 3 and 4. The operating lever 5 can be operated in a comfortable position at a position close to the body, and the height of the handles 3 and 4 is optimal for work, depending on the work content such as tilling, turning, and driving on the road. Operations such as shifting can be easily performed at any time.

Further, as shown in FIG. 3, in the bent portion 7c, if the abutting angle α of the bridge pipe of the welded portion of the trapezoidal upper shape is a simple curved shape, the abutting angle of the bridge pipe of the welded portion is assumed. It can be made larger than β.
If the bridge pipe 7 is curved with respect to the handles 3 and 4 and abutted at a sharp angle at a small angle in this way, it becomes difficult for the welding rod to enter the portion and good welding cannot be performed, but this is large in the present invention. By abutting against the angle, the welding rod can be pressed against the welded portion with a margin to perform good welding, and the strength of the welded portion can be increased.
If the upper shape of the isosceles triangle is used instead of the upper shape of the trapezoid, if the triangle is formed low, it can be struck at a large angle with respect to the left and right handles, but the pocket becomes shallow and it swells greatly backward. It is not possible to provide a long operating lever 5 because it cannot be pulled out, and if it is a high triangle, the tip is sharply pointed toward the rear and hits the driver's abdomen between the left and right handles, which is not preferable.
The trapezoidal upper shape of the bridge pipe 7 includes a shape in which the upper side portion of the trapezoid is curved upward.

Further, since the bridge pipe 7 has a trapezoidal upper shape, the abutting angle of the rear portion of the welded portion is widened. Therefore, as shown in FIG. 3, the fixed positions of both end portions 7a and 7b of the bridge pipe 7 are set to the handles 3 and 4. There is also an advantage that the left and right handles 3 and 4 can be reinforced more strongly by setting the fixed position of the bridge pipe on the rear side of the handles 3 and 4 by bringing them closer to the operation panel 6 provided in the above.

Then, when the working machine is used, when the heights of the left and right handles 3 and 4 are adjusted up and down by the handle height adjusting portion 8, the distance between the grip portion 5a of the operating lever 5 and the bridge pipe 7 changes. However, by forming the bent portion 7c as described above, both handles 3 and 4 come into contact with the bridge pipe 7 regardless of the vertical or vertical position, and the operating lever 5 is in contact with the bridge pipe 7 regardless of the vertical or horizontal operating position. No, the degree of freedom of lever operation is secured.

Further, at that time, if the bent portion 7c of the bridge pipe 7 is greatly expanded rearward so as to hold the grip portion 5a and maintain a distance that does not contact the bridge pipe 7, the above can be said even when the two are closest to each other. It is possible to safely operate the lever without getting a hand caught between the operation lever 5 and the bridge pipe 7.

In use, despite the lengthening of the operation lever 5, the freedom of operation such as shifting according to the work content at the heights of the handles 3 and 4, which are optimal for work such as tilling and turning, is maintained. To.
For example, when turning the work machine to move it to another ridge, the handles 3 and 4 are lowered in order to lift the rotary part in front of the machine from the ground, but at that time, the long operating lever 5 is not hit. The handles 3 and 4 can be adjusted to a high position, and by adjusting the handles 3 and 4 to a high position, the positions of the handles 3 and 4 are not excessively lowered, and the left and right handles 3 and have an appropriate height. You will be able to put your body in between 4 and make a turn in a comfortable posture.

Further, as shown in FIG. 2B, when the position of the operation lever is adjusted by adjusting the height of the left and right handles 3 and 4 and raised, the grip portion 5a of the operation lever 5 is moved to the left and right handles 3. As shown in (a) of FIG. 2, the grip portion 5a of the operation lever 5 is set to be on the upper side between the left and right handles 3 and 4 when it is lowered. When traveling, the operating lever 5 below the bridge pipe 7 is guarded from above by adjusting the handles 3 and 4 to a higher position in response to the rotary 15 raised higher than the road surface. , Safety can be enhanced by preventing sudden shifts due to careless operation of the operation lever 5.
Further, when performing tilling work, by adjusting the handles 3 and 4 to a lower position, the grip portion 5a of the operation lever 5 is projected above between the left and right handles 3 and 4, so that the clutch and the like can be operated. It becomes easier to do.

When turning the work machine by moving the ridges, if the handles 3 and 4 are adjusted to a high position and the rotary 15 is raised so as not to come into contact with the agricultural land, the rear side of the machine body is lowered with the drive wheel 12 as a boundary and the handle is handled. Even if 3 and 4 are lowered, as shown in (b) of FIG. 2, the steering wheel grip 9 is not excessively lowered, so that it can be operated without any trouble. However, when the rotary 15 is raised too high, the steering wheel 3 and 4 may become too low, and in that case, it is possible to assist the steering wheel operation by grasping the bent portion 7c of the bridge pipe 7 immediately in front of the bridge pipe 7.

Further, as shown in FIGS. 1 and 2, the bent portion 7c of the bridge pipe 7 is provided with a fuel tank 10 above the engine portion at the rear of the machine body 1, and the fuel injection portion is located above the fuel tank 10. It can be bent significantly backwards of the inlet (the portion closed and shown by the cap 11 in FIG. 1) so as to avoid its fuel inlet.
In this embodiment, since the bent portion 7c of the bridge pipe 7 is separated from the cap 11 of the fuel injection port, the bridge pipe 7 does not interfere with the refueling work such as attaching / detaching the cap 11 and inserting the refueling nozzle, so that refueling can be performed easily. become.

The present invention strengthens the left and right handles of a walking work machine for agriculture by bridging a bridge pipe, and makes it possible to easily operate the operation lever between the left and right handles, especially in a narrow space between furrows. is optimum for walking-type working machine for performing work, it is possible to use the operating lever is wider in the walk-in various working machines provided between the left and right handles.

1 Aircraft 2 Pivot 3 A Right handle 3a Intermediate part of the right handle 3b A part close to the front end of the operation panel of the right handle 4 Left handle 4a Intermediate part of the left handle 4b Operation panel of the left handle 5 Operation lever 5a Grip part of operation lever 6 Operation panel 6a Front end part of operation panel 7 Bridge pipes 7a, 7b Bridge pipe ends 7c Bending part 8 Handle height adjustment part 9 Handle grip 10 Fuel tank 11 Cap 12 Drive wheel 13 Tillage depth adjustment wheel 14 Rotary cover 15 Rotary 16 Engine α Abutment angle of the bridge pipe of the trapezoidal upper welded part β Abutment angle of the bridge pipe of the welded part of the simple curved shape

Claims (4)

The left and right handles that spread backward to the left and right are rotated up and down to project into the pivotal branch provided in the upper center of the fuselage so that the height can be adjusted. The front end of the left and right handles is approximately in the middle of the handles. an operation panel which is located at a site, the walk-behind working machine for agriculture having a control lever backward between the left and right handle,
A bridge pipe having a symmetrical trapezoidal upper shape and a bent portion that bulges rearward is fixed to the base point by welding, with a portion close to the front end of the operation panel of the left and right handles as a base point.
The length at which the grip portion of the operation lever is located behind the front end portion of the operation panel and the grip portion does not come into contact with the bridge pipe even if it is moved by adjusting the vertical height of the handle and operating the operation lever vertically and horizontally. A walking type work machine characterized by being equipped with an operation lever. When the height of the operation lever is adjusted by adjusting the height of the left and right handles up and down, the grip part of the operation lever is on the lower side between the left and right handles, and when it is lowered, the grip part of the operation lever is between the left and right handles. The walking type work machine according to claim 1, wherein the work device is set so as to be on the upper side of the above. The walking work machine according to claim 1 or 2, wherein the bent portion of the bridge pipe is formed so that the hand holding the grip portion of the operating lever can maintain a distance that does not come into contact with the bridge pipe. The engine part such as the engine and the fuel tank is arranged at the rear part of the airframe, the cultivated part such as the rotary is arranged at the front part of the airframe, and the bent part of the bridge pipe is provided at the fuel inlet of the fuel tank provided at the upper part of the engine part. The walking type working machine according to any one of claims 1 to 3, wherein the walking work machine is formed so as to avoid the above.

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