JP4417279B2 - Handle structure of walking type agricultural machine - Google Patents

Description

  The present invention relates to a handle structure of a walking type farm work machine such as a management work machine.

Conventionally, as shown in Patent Document 1, a management work machine in which a loop-type handle is extended rearward on an upper part of a transmission case having left and right rotary parts having tilling claws is known.
This management working machine handle Oite backwards, raised from the rear end of the horizontal grip portion of the right and left (lateral grip portion) toward the rising portion (lateral grip portion) above the center of the handle rear of the rising portion A cross part (upper gripping part) is integrally bent at the upper end. In addition, a clutch lever formed in a similar shape along the shape of the rear part of the handle is provided so that it can be operated on and off.
JP 2004-217117 A

The management work machine of the above-mentioned patent document 1 holds the side gripping part or the side gripping part with both hands from the rear of the handle for plowing work and the like, and when turning the body, the upper gripping part at a high position is used. The aircraft is turned by gripping and pushing down the handle. However, when the clutch lever with the clutch engaged is grasped with both hands and the clutch lever is to be turned off, an unskilled operator does not grasp the handle when releasing both hands simultaneously from the clutch lever. In particular, there is a sense of anxiety, it is easy to take the operation of releasing the clutch lever one hand at a time, and there are problems such as delaying the clutch lever disengagement and troubles associated with the operation delay.

Further, since the handle has a shape in which the side gripping portion (the rising portion) is raised from the rear end of the side gripping portion toward the upper gripping portion without forming the horizontal gripping portion horizontally, the operator can It is difficult to do a side grip that is gripped directly below the horizontal direction, and the palm will be in a state of gripping obliquely along the inclination of the side gripping part, so steer by pushing down the handle or pushing and pulling left and right However, there is a drawback that the hand is easily slipped along the inclination. Furthermore, for example, when you want to lift the wheel by lifting the rear part of the fuselage stably with the center part of the handle like when the wheel sinks deeply on the ground, the upper grip part is at a high position. There is a problem that it is difficult to grip and lift the handle upward.

In order to solve the above-mentioned problem, the handle structure of the walking type farm working machine according to the present invention is as follows. First, when the handle 5 is extended behind the machine body frame 2 having the rotary unit 10, the handle 5 is arranged on the left and right sides. In the walking type farm working machine having the clutch lever 20 that is configured in a loop shape by connecting the side gripping portion 26 with the rear gripping portion 27, the rear gripping portion 27 of the handle 5 includes: Lateral gripping portions 40 and 40 that are substantially horizontal in the lateral direction at the rear ends of the left and right side gripping portions 26 and an intermediate lower gripping portion 36 are formed, and the upper gripping portion 35 is disposed above the lower gripping portion 36. The upper grip part 30 which has is provided.

  Secondly, the upper grip 30 is characterized in that the vertical grips 39 and 39 are formed in an inverted U shape on both sides of the upper grip 35 and are provided between the left and right lateral grips 40 and 40.

The present invention configured as described above can achieve the following effects . The handle provided with the clutch lever is provided with the left and right lateral gripping portions and the upper gripping portion forming the upper and lower upper gripping portions and the lower gripping portion at the center portion, so that the lower gripping portion is previously held without releasing both hands from the handlebar. Since the clutch lever can be disengaged while holding the handle, the steering wheel can be stably supported and operated. Further, when turning the aircraft, it is possible to smoothly turn the aircraft by holding the upper gripping portion at a high position and pushing down the handle.
Since the lower gripper can be gripped and lifted between the left and right lateral grippers, the lifting operation can be performed without gripping the upper gripper at a high position or the lateral gripper eccentric from the center of the machine. Can be carried out stably and easily.

  In addition, by providing an inverted U-shaped upper gripping portion above the lower gripping portion at the center of the horizontal gripping portion, a sufficiently long lateral gripping portion can be formed on both sides of the upper gripping portion. Also, when steering by pushing and pulling the handle in the left-right direction, the vertical gripping part formed in a substantially parallel shape on both sides of the upper gripping part can be gripped vertically, preventing hand slipping and making it easier to correct the direction of the aircraft be able to. Further, when the base side of the vertical gripping portion is vertically gripped, the lower part of the hand can be stably supported by contacting the horizontal gripping portion or the lower gripping portion, so that the handle can be pushed down easily.

  An embodiment of the present invention will be described with reference to the drawings. The code | symbol 1 shows the management work machine which performs tilling work as an example of a walk type farm work machine. This management work machine 1 is composed of a transmission case 2 having a U-shape as viewed from the side, an engine 4 covered with a bonnet 3 mounted on the top of the transmission case 2, and a handle 5 according to the present invention at the rear. A column-like handle support portion 6 that is attached and supported so as to be pivotable in the front-rear direction is attached and fixed rearward and obliquely upward.

Handle 5 is a pipe or the like rod-shaped member is a loop bent loop type with pear, are inserted to attach secure the handle support 6 bifurcated tip portion, and a clutch lever to be described later to the rear of the handle 5 20 is provided so that it can be turned on and off, and an accelerator lever (not shown) is provided.
The transmission case 2 has a square shape in a side view, and supports an axle 7 having wheels 7a and 7a on the left and right of the lower portion of the rear case portion, and a plurality of tilling claws on the left and right of the front end portion of the front case portion. The rotary part 10 is supported by a rotary shaft 9 having 8.

The rotary unit 10 covers the rotary track 11 from the upper side to the rear side with a rotary cover 11. The rotary cover 11 is fixed to the middle part of the transmission case 2 and is supported by an attachment rod 12 that extends with the front side also serving as a handle.
The mounting rod 12 is formed in a U shape in a plan view and protrudes from the rotary cover 11 to the front side, and also serves as a handle that is gripped when the machine body is lifted.

Further, the mounting rod 12 is supported by a rigid structure by connecting the front side of the front end of the transmission case 2 to the front end of the transmission case 2 and is configured as a mounting frame that supports the single-wheeled front wheel 15 so that the height can be adjusted. .
The connecting frame 13 is provided with a front wheel support arm 16 that pivotally supports the front wheel 15 so as to be capable of rotating.

  Thereby, when the front wheel 15 is set at the lowest position shown by the solid line in FIG. 1, the rotary unit 10 can be levitated and supported in a direction away from the ground with the wheel 7 a, and smooth road traveling can be performed. . Further, when the front wheel 15 is sequentially positioned and fixed upward as indicated by the dotted line in the figure, the rotary unit 10 can be lowered stepwise based on the ground contact position of the front wheel 15 and the tilling work with the tilling depth gradually increased is performed. Can do.

  The transmission case 2 includes a transmission that includes a traveling transmission mechanism that changes the traveling driving force of the wheels 7 a and a rotary transmission mechanism that changes the rotary driving force of the rotary unit 10. Then, the power is transmitted from the output shaft 17 of the engine 4 to the input shaft 19 of the transmission via a main clutch including a belt tension clutch (not shown). This main clutch is operated by an on / off operation of a clutch lever 20 installed on the handle 5 by a structure similar to that of the conventional one.

  The traveling speed change mechanism of the wheel 7a and the rotary speed change mechanism of the rotary unit 10 are respectively shifted by the operation of the speed change lever 21 extended rearward from the transmission case 2, and the traveling and tilling work of the management work machine 1 is performed at an appropriate speed. Can be done.

Next, the handle 5 and the clutch lever 20 will be described with reference to FIGS. The loop-type handle 5 is positioned and fixed by inserting and fastening a bolt 22 with a knob between the handle support portion 6 between the bifurcated tip portions.
At this time, if the handle 5 is rotated using the bolt 22 as a fulcrum, the height of the rear handle 5 can be adjusted according to the position desired by the operator.
Further, when the bolt 22 is loosened and the handle 5 is turned in the reverse direction to the front side, the retracted posture can be brought into the folded state at the position indicated by the dotted line in FIG.

  As shown in FIGS. 1 to 3, the handle 5 has an inclined portion 25 that rises steeply from the base side toward the rear upper side, and a side grip that is bent substantially horizontally from the inclined portion 25 toward the rear. A portion 26 and a rear grip portion 27 that connects the left and right side grip portions 26 and 26 in a loop shape are formed in series by a single pipe material. And the upper grip part 30 mentioned later is set up in the center part of the back grip part 27.

The clutch lever 20 includes the left and right side gripping portions 26 and the rear gripping portion of the handle 5 in a plan view and a side view of a power-on position that is brought close to the left and right side gripping portions 26 and the rear gripping portion 27 of the handle 5. 27 is formed in a similar shape that can be approached substantially along the line 27 . The clutch lever 20 pivotally supports a bifurcated tip on pivots 31 and 31 provided in the middle of the side grips 26 and 26 of the handle 5.

The front end of the clutch lever 20 and the main clutch are connected by a wire 32, and the clutch lever 20 is moved from the clutch disengagement position indicated by the dotted line in FIG. When rotated to the solid line position, the main clutch can be reversibly engaged and operated. The clutch lever 20 can be gripped with the left and right side gripping portions 26 and the rear gripping portion 27 of the handle 5 at the solid line position, and when the grip is released, the clutch lever 20 is returned to the cut position by the biasing force of the spring. The

The upper grip 30 is formed in a substantially inverted U shape when viewed from the front, and both ends thereof are distributed and attached to the center of the rear grip 27 of the handle 5. As a result, the handle 5 has an upper grip 35 and a lower grip 36 formed at the center of the rear grip 27 , and a space 37 into which a hand can be inserted is formed therebetween. On both sides of the space portion 37, both leg portions of the upper grip portion 30 are formed as vertical grip portions 39, 39 in the vertical direction, and a lower grip portion 36 is formed therebetween. The upper grip 30 may be attached and fixed to the handle 5 with only one of the vertical grips 39 having sufficient strength. In this case, the upper grip 30 may be formed in an inverted L shape. it can.

On the rear gripping portion 27 located at the rear portion of the handle 5, horizontal gripping portions 40, 40 having substantially the same length on the left and right sides of the lower gripping portion 36 are formed horizontally.
The clutch lever 20 is formed with each gripping part in a shape along the contours of the upper gripping part 30 and the lateral gripping parts 40, 40 of the handle 5. That is, as shown in FIG. 2, the upper grip operation portion 41 formed in an inverted U shape in the central portion of the clutch lever 20 and having the same shape as the upper grip portion 30 is the front side of the upper grip portion 30 when the clutch is engaged. And can be gripped with the upper grip 30 in a side grip state. Further, both sides of the upper grip operation portion 41 can be gripped together with the vertical grip portion 39 and the horizontal grip portions 40 and 40 of the handle 5.

  As described above, the loop type handle 5 of the management work machine 1 is provided with the upper grip 30 at the center of the rear grip 27 so that when the clutch lever 20 is operated, both the handle 5 and the clutch lever 20 are moved. It can be held and cultivated. At this time, the operator can walk while grasping the left and right lateral gripping portions 40 together with the clutch lever 20 from the rear of the handle 5 during straight tillage. Further, when the work is performed while walking in an uncultivated position where the cultivated soil surface that is cultivated by the rotary unit 10 is not stepped on, it is possible to walk while grasping either the left or right lateral gripping part 40 with the clutch lever 20 with one hand. .

  At this time, if the hand is changed and the upper grip operation part 41 of the clutch lever 20 and the upper grip part 35 of the upper grip part 30 are both gripped, the gripping height is increased from the waist level of the operator to the position of the abdomen. be able to. This makes it easy for the operator to push down the handle 5 greatly when turning and cultivating while continuing the tilling work, and the front wheel 15 can be lifted and the aircraft can be turned smoothly. Further, after turning the airframe, it is possible to facilitate the straight-plowing work by holding the side gripping portion 40 again.

  Further, the upper grip 30 provided above the lower grip 36 is preferably formed in an inverted U shape in which the vertical grips 39 and 39 are formed in substantially parallel from both sides of the upper grip 35. The lateral gripping portions 40 and 40 having a sufficient length can be formed on both sides of the upper gripping portion 30 so that the portion 37 is wide enough for one hand to enter.

  Further, for example, when the direction of the machine body is instantaneously corrected to the left and right during tillage work, the palm can hold the vertical grip portion 39 vertically without gripping diagonally as in the prior art, so the handle 5 can be moved in the horizontal direction. Thus, the direction of the aircraft can be easily corrected without sliding the hand when pushing and pulling. Further, by vertically gripping the base side of the vertical grip portion 39, the lower part of the hand can be brought into contact with the horizontal grip portion 40 or the lower grip portion 36 and stably supported. In this state, the horizontal grip portion 40 or The lower grip 36 can be pushed down strongly, and the handle 5 can be pushed down easily.

  In the tilling work as described above, when it is desired to stop the rotary unit 10 and turn the body, the hand holding the clutch lever 20 is released, but at this time, the lower gripping part 36 is moved downward with the other hand in advance. Therefore, the lower gripping portion 36 can be stably supported and steered without releasing both hands from the handle 5.

Further, the hand holding the lower holding part 36 is eccentric from the upper holding part 35 or the center of the machine body at a high position, for example, when the wheel 7a significantly sinks due to the field conditions and causes a large running resistance or slip. without gripping the lateral grip portion 40, it is possible to float the wheels 7a lift with a portion located in the vehicle body center at a lower position, the side grip part 26 of the left and right of the handle 5 gripped by the right and left airframe Sufficient lifting operation can be performed stably without tilting or taking an unreasonable posture.

  Furthermore, as described above, the handle 5 including the upper gripping portion 35 and the lower gripping portion 36 can be easily operated by lifting the lower gripping portion 36 at a lower position from below when the bolt 22 is loosened and switched to the retracted position. In addition, since the lower gripping portion 36 is higher than the upper gripping portion 35 in the retracted posture, there is an advantage that it is easy to perform switching operations such as returning to the retracted posture and the working posture.

  Next, another embodiment of the handle will be described with reference to FIG. In addition, description is abbreviate | omitted about the structure and effect | action similar to the thing of the said embodiment. The rear gripping portion 27 of the handle 5 is formed by bending the upper gripping portion 30 integrally between the horizontal gripping portions 40, 40 that are substantially horizontal on the left and right sides, and a lower gripping portion made of a straight pipe-shaped pipe member. 36 is connected to the left and right lateral gripping portions 40, 40 to form an upper gripping portion 35 and a lower gripping portion 36.

The shape of the upper gripping portion 30 is such that the upper gripping portion 35 of a length that can be gripped by one hand is substantially parallel to the lower gripping portion 36, and the left and right vertical gripping portions 39, 39 are arranged in a substantially vertical direction with less inclination. It is formed as a vertical shaft standing up.
According to this configuration, the handle 5 is connected to the base side of the upper gripping portion 30 that is bent in a reverse substantially U shape with the lower gripping portion 36, so that the rear gripping portion 27 of the handle 5 can be reinforced, There is a feature that the length of the horizontal gripping portions 40, 40 can be sufficiently formed by raising the vertical gripping portions 39, 39 at a steep angle within the handle width.

It is a side view showing the whole management work machine provided with the handle structure concerning the present invention. It is a top view of FIG. It is a front view of FIG. It is a rear view which shows another embodiment of a handle.

Explanation of symbols

1 walk-type farm work machine (management work machine)
2 Airframe frame (transmission case)
5 Handle 10 Rotary part 20 Clutch lever 26 Side grip part 30 Upper grip part 35 Upper grip part 39 Vertical grip part 40 Horizontal grip part

Claims (2)

When extending the handle (5) behind the machine frame (2) having the rotary part (10) , the handle (5) connects the left and right side gripping parts (26) with the rear gripping part (27). In the walking type agricultural machine having the loop lever and having the clutch lever (20) substantially conforming to the shape of the handle (5) , the rear grip portion (27) of the handle (5) square gripper lateral grip portion having a substantially horizontally in the lateral direction at the rear end (26) (40), and (40), the lower grip of the intermediate (36) and is formed, the lower grip part (36) A handle structure of a walking type agricultural working machine, wherein an upper gripping part (30) having an upper gripping part (35) is provided above the upper part. The upper gripping part (30) is formed in an inverted U shape on both sides of the upper gripping part (35) and the vertical gripping parts (39), (39) are formed between the left and right lateral gripping parts (40), (40). The handle structure of the walking type agricultural working machine according to claim 1 provided.

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