JPH084406B2 - Travel lever device for mower - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a driver seated in a rear portion of a machine body operating a lever shaft with one hand by a driver to move the machine body forward and backward, turn, and raise and lower a reaping unit. The present invention relates to a traveling lever device in a mower configured to perform.

[0002]

2. Description of the Related Art First, an outline of a mower to which the present invention is applied will be described with reference to FIGS. 1 and 9 showing an embodiment of the present invention. The rubber crawlers 2 are attached to the left and right ends of the machine body 1, respectively.
The vehicle body 1 is driven by hydraulic pressure to travel around, so that the machine body 1 moves forward and backward or turns. A reaping unit 3 is mounted on the front of the machine body 1 so as to be able to move up and down by the action of a hydraulic cylinder 4. At the rear end of the machine body 1, a driver's seat unit 5 for protruding the driver M to perform a driving operation in a standing posture is provided in a protruding manner. At the upper end of the driver's seat unit 5, the driver's M trunk is provided. A protective arm 6 for safety is attached to allow the portion to enter and protect. A travel lever device L ′ (see FIG. 9) that controls the travel of the left and right rubber crawlers 2 is provided in the rear part of the machine body 1 and in front of the driver seat unit 5. An auxiliary handle 7 for stabilizing the driving posture by gripping with the hand of the non-operating side of the driver M is provided in a portion where the'is provided.

This mower often cuts off vegetation growing on slopes such as slopes of dikes along contour lines. In this case, the machine body inclines along the slopes. The driver M getting on the vehicle 5 holds the auxiliary handle 7 with one hand to stabilize its driving posture, and operates the traveling lever device L ′ with the other hand. Therefore, the traveling lever device L '
Has a single lever shaft, and the cutting height adjustment switch and the traveling lever shaft are integrated so that the cutting height can be adjusted with the fingertips of the hand holding this handle. 2 different operation of machine and adjustment of cutting height
It is designed so that one operation can be performed simultaneously with one hand.
That is, as shown in FIG. 9, in the conventional traveling lever device L ′, the grip portion 31 a of the handle 31 having a substantially U shape is provided.
The handle 31 is fixed to the upper end of the lever shaft 32 so that the handle 31 is horizontal,
So that it can be operated with the middle finger of the hand holding the grip 31a of the
The cutting height adjusting switch 33 is attached to the upper end of the lever shaft 32. In this way, the cutting height adjustment switch 33 is pressed by the middle finger of the hand holding the grip 31a of the handle 31.
Is designed so that it can be operated for the following reasons. That is, in both cases of sloping ground and flat ground, the driver moves to the left and right in the driver's seat unit 5 in order to check for a cut with the part cut immediately before and for an obstacle during cutting. In some cases, there is no choice but to operate the drive lever.In this case, the travel lever device must be operated with the hand opposite to the one on which it was moved. This is because the high adjustment switch 33 can be operated.

However, since the conventional traveling lever device L'has a structure in which the cutting height adjusting switch 33 is tilted in the directions of arrows R and R'by the middle finger to operate it, it is difficult to finely adjust the switch, and the handlebar handle is used. Since the grip portion 31a of 31 is horizontal (sideways), it is easy to perform a turning operation by rotating the lever shaft 32 itself in the directions of arrows Q and Q ', but in the case of forward movement with a high operation frequency, It was difficult to operate (For forward and reverse operations, move the lever shaft 32 to the arrow P, P '.
In order to move it back and forth as shown in, it is easier to perform the operation when the handle grip is oriented vertically).

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned drawbacks of the traveling lever device of the conventional mower, and the thumb can be used to operate the cutting height adjustment switch in the case of operation with either the left or right hand. In addition, the position of the handle can be changed vertically and horizontally according to each operation of forward and backward movement and turning of the machine, and each operation of forward and backward movement of the mower, turning, and cutting height adjustment is performed. The task was to make it easier.

[0006]

In order to solve this problem, the means adopted by the present invention is a driver's seat unit for mounting a reaping unit on the front part of the machine body for a driver to stand up. It is attached to the rear part of the machine body, and a lever shaft is provided in the part of the machine body in front of the driver's seat unit,
In a lawn mower configured such that a driver boarding the driver's seat unit operates the lever shaft with one hand, a positioning board is integrally attached to an upper end portion of the lever shaft, and a grip portion of a substantially U-shaped handle is provided. Rotatably attached to the positioning substrate via a support shaft,
A cutting height adjusting switch for raising and lowering the reaping unit is attached to a portion of the handle opposite to the free end of the grip, and the handle is rotated about the fulcrum shaft by the fixed position changing means. By releasably fixing the handle to three different positions of the positioning board, two lateral positions in opposite positions and the two
This means that the handle can be fixed to the positioning substrate at three positions, that is, a vertical position that is substantially orthogonal to any of the two horizontal positions.

[0007]

When the driver is in a normal driving posture in which the driver is positioned at the center of the machine body in the width direction, the steering wheel is set in the vertical position and the grip portion is grasped by one hand to make the lever shaft. Move forward and backward to adjust the speed of forward and backward movements, and use the thumb of the hand holding the grip of the handle to operate the cutting height adjustment switch located immediately before it to raise and lower the mowing unit. Adjust the cutting height with. In this normal driving posture, when the driver moves to the left or right for trimming, checking for obstacles, etc., the handle is released from the positioning board and the handle is rotated 90 ° in either direction. Move it to the horizontal position,
Fix it again. In this state, the hand on the opposite side to the moved side can hold the grip of the handle in a comfortable and natural posture, and operate the lever shaft with that hand, Since the cutting height adjusting switch is arranged in the part, the cutting height can be easily adjusted by operating the switch with this thumb. Further, when the driver moves from the left end to the right end, the steering wheel in the sideways position may be turned over by 180 °, and in the normal driving posture, when turning the aircraft, the operation is performed. The handle may be placed in the sideways position to facilitate the operation.

[0008]

EXAMPLES Hereinafter, the present invention will be described in more detail with reference to examples. The same parts as those described in the section of "Prior Art" are designated by the same reference numerals, and the overlapping description will be avoided to explain only the characteristic parts of the present invention. FIG. 1 is a side view of a mower equipped with a traveling lever device L according to the present invention, FIG. 2 is a plan view in which a part of the traveling lever device L is cut away, and FIG. 2 is a cross-sectional view taken along line XX of FIG. 4, FIG. 4 is a perspective view of the traveling lever device L in a state in which the handle 11 is in the vertical direction, and FIG. 5 is a perspective view in a state in which the handle 11 is also in the horizontal direction. In each figure, the handle 11
Has a substantially U-shape, and the parallel portion 11b opposite to the grip portion 11a is positioned via the support shaft 12 on the positioning substrate 1
3 is rotatably mounted. That is, one end of the support shaft 12 is fixed to the parallel portion 11b of the handle 11 by welding, and the support cylinder 14 penetrates the positioning board 13 and is fixed to the support cylinder 14 by welding.
2 is inserted, and a nut 18 is screwed into a male screw portion (not shown) formed at the tip of the support shaft 12, whereby the handle 11 is attached to the positioning board 13 via the support shaft 12 and the support cylinder 14. Is rotatably mounted. The positioning board 13 has a triangular shape and is fixed to the upper end of the lever shaft 19 in an inclined posture. In addition, in FIG.
Reference numerals 15 and 17 denote thrust washers interposed between the parallel portion 11b of the handle 11 and the end surface of the support cylinder 14, and between the end surface of the support cylinder 14 and the nut 18, respectively.

The positioning board 13 has three fitting holes 21a, 21b, 21c on the same circumference centered on the support shaft 12.
Is provided. These three fitting holes 21a, 21b, 21
c is 90 ° in the central angle formed by adjacent objects
It is arranged and formed so that A guide cylinder 22 is fixed to the parallel portion 11b of the handle 11 so as to be perpendicular to the positioning board 13, and a fitting rod 23 is inserted into the guide cylinder 22 so as to be able to move in and out. The tip portion of the fitting rod 23 is a fitting portion 23a having a larger diameter than other portions, and the end surface of the fitting portion 23a and the guide tube 2 are provided.
A compression spring 24 is elastically mounted between the two end faces and urges the fitting rod 23 in the protruding direction. The fitting portion 23a at the tip of the fitting rod 23 is fitted into each fitting hole 21a, 21b, 21c provided in the positioning board 13 in a removable manner. A fixing release lever 25 is attached to a rear end portion of the fitting rod 23 in a direction perpendicular to the axis, and the fixing release lever 25 is formed in the rear end portion of the guide cylinder 22 through an elongated hole 2
It has entered 2a. When the fixing release lever 25 comes into contact with the end of the elongated hole 22a, the fitting rod 2
Three protruding ends are defined. A cutting height adjusting switch 26 is attached to the end of the parallel portion 11b of the handle 11, that is, the portion where the thumb is located when the grip 11a of the handle 11 is held by one hand. Further, of the above-mentioned three fitting holes 21a, 21b, 21c, the two fitting holes 21a, 21c located at both ends of the fitting holes 21a, 21c are provided with a tip end of the fitting rod 23 when the handle 11 is rotated. Stopper plates 27 for making contact with each other and preventing the handle 11 from rotating further are arranged and attached to the positioning board 13.

The state shown in FIG. 4 and FIG.
Is located in the center of the driver's seat unit 5, and the steering wheel 11 is oriented vertically, and the driver M holds the auxiliary steering wheel 7 with his left hand and at the same time holds the grip portion 11a of the steering wheel 11 with his right hand. The lever shaft 19 with an arrow P,
The posture is such that the forward speed of the machine body 1 can be easily adjusted by moving it back and forth in the direction P '. Since the cutting height adjustment switch 26 is located near the thumb of the hand holding the grip 11a of the handle 11, the thumb tilts the cutting height adjustment switch 26 in the directions of arrows R and R '. As a result, the mowing unit 3 can be moved up and down to easily adjust the mowing height.

In the above state, when the driver M moves to the right side for trimming and checking for obstacles,
As shown in FIGS. 5 and 7, the handle 1 is held by the left hand.
When 1 is gripped and the fixing release lever 25, which is substantially parallel to the grip portion 11a of the handle 11, is gripped by a predetermined amount, the fitting hole 21b provided in the positioning board 13 is provided.
The fitting portion 23a of the fitting rod 23 comes out of the lock rod 23, and in this state, the handle 11 is rotated clockwise by about 90 ° to open the fixing release lever 25 that is being gripped. , The fitting portion 23a of the fitting rod 23 is the fitting hole 21a of the positioning board 13.
It goes in and is fitted. As a result, the grip 11a of the handle 11 becomes substantially horizontal, and the grip 11a of the handle 11 is gripped with the left hand and the auxiliary handle 7 is gripped with the right hand in a natural posture without twisting the left wrist. , Stabilize the driving posture. Even in this state, the cutting height adjustment switch 26 is located near the thumb of the left hand holding the handle 11, so that the raising and lowering operation of the cutting unit 3 can be easily performed even when the cutting unit 3 is tilted to the right.

Further, when the driver M approaches the right side in the above-described state, when the driver M approaches the left side as shown in FIG.
When the fixed release lever 25 is gripped by a predetermined amount with the hand holding the handle 11 and then the handle 11 is inverted by 180 ° to open the fixed release lever 25, the fitting portion of the fitting rod 23 has a different fitting hole. 21c is inserted and fitted. As a result, the auxiliary handle 7 can be held by the left hand to stabilize the driving posture, and the handle 11 can be held in the most natural posture of the right hand without twisting the right wrist. Even in this case, since the cutting height adjustment switch 26 is located near the thumb of the right hand holding the handle 11,
The cutting height can be easily adjusted by holding the handle 11.

Further, as shown in FIG. 4, the handle 1
When the machine body 1 is turned in the state in which the handle 1 is vertically positioned, the handle 11 is rotated 90 ° in either direction as described above to move the handle 11 to the horizontal position as shown in FIG. Then, when the lever shaft 19 is rotated in the directions of the arrows Q and Q ', the operation is easy to perform.

In the above embodiment, the positioning board 13 is used.
On the other hand, the fixed position changing means for changing the fixed position of the handle 11 sets the central angles of the adjacent ones on the same circumference of the positioning substrate 13 centered on the support shaft 12 to approximately 90 °. Three fitting holes 2
1a, 21b, 21c, and a fitting rod 23 provided on the handle 11 so as to be fitted into the fitting holes 21a, 21b, 21c in a removable manner. The fixing release lever 25 is attached to the upper end of the handle 11 so as to be substantially parallel to the grip portion 11a of the handle 11, and after the fixing release lever 25 is grasped by the hand holding the handle 11, the handle 11 is rotated to a predetermined position. By releasing the fixing release lever 25 that is being grasped,
The operation of changing the fixed position of the handle 11 can be instantaneously performed.
The means for changing the fixed position of No. 1 is not limited to this.

[0015]

According to the present invention, in a traveling lever device for a mower, a positioning board is integrally attached to an upper end portion of a lever shaft, and a handle is rotatably attached to the positioning board via a support shaft so that the handles are rotatable relative to each other. Since the handle can be fixed to the positioning board at three positions, that is, two lateral positions in the inverted position and a vertical position that is orthogonal to both of the two lateral positions, the structure is as follows. Various effects such as are played. (1) By rotating the steering wheel according to the position of the driver in the driver's seat unit, the position of the steering wheel can be instantly changed between the above-mentioned three fixed positions, which corresponds to the position of the driver. The handle can be grasped in the most natural position to perform various operations such as back-and-forth movement and rotation of the lever shaft. (2) The position of the cutting height adjustment switch with respect to the grip of the handle is unchanged, and the cutting height adjustment switch can be operated with the thumb of the hand holding the handle that allows delicate adjustment. Can be done accurately.

[Brief description of drawings]

FIG. 1 is a side view of a mower equipped with a traveling lever device L according to the present invention.

FIG. 2 is a plan view in which a part of a traveling lever device L is cut away.

3 is a cross-sectional view taken along line XX of FIG.

FIG. 4 is a perspective view of a traveling lever device L with a handle 11 in a vertical orientation.

FIG. 5 is a perspective view of the same lateral orientation.

FIG. 6 is a partial plan view showing a state in which a driver M is located in the center of a driver's seat unit 5 and is driving.

7 is a partial plan view showing a state in which a driver M is driving toward a right side of a driver's seat unit 5. FIG.

FIG. 8 is a partial plan view showing a state in which a driver M is driving toward the left side of the driver's seat unit 5.

FIG. 9 is a schematic plan view of a conventional traveling lever device L ′.

[Explanation of symbols]

 L: Travel lever device M: Driver 1: Airframe 3: Mowing unit 5: Driver's seat unit 11: Handle 11a: Grip of handle 12: Spindle 13: Positioning board 19: Lever shaft 21a, 21b, 21c: Fitting Hole (fixed position changing means) 23: Fitting rod (fixed position changing means) 25: Fixing release lever (fixed position changing means) 26: Cutting height adjustment switch

Claims (2)

[Claims] 1. A mowing unit is attached to the front of the machine body,
A driver seated in a driver seat unit for mounting the driver in a standing posture is mounted on a rear portion of the machine body, and a lever shaft is provided in a part of the machine body in front of the driver seat unit so that the driver seats in the driver seat unit. In a mower having a structure in which the lever shaft is operated by one hand, a positioning board is integrally attached to the upper end portion of the lever shaft, and a portion of the handle having a substantially U-shape is opposed to a grip portion through a support shaft. Rotatably attached to the positioning board, and a cutting height adjusting switch for raising and lowering the reaping unit is attached to a portion of the handle opposite to the free end of the grip portion, and the fulcrum is used as a center. By rotating the handle and releasably fixing the handle to the three different positions of the positioning board by the fixed position changing means, the two handles are in the reverse positions to each other. And landscape position, 3 the vertical position substantially perpendicular to either of the two lateral positions
A traveling lever device in a mower, wherein a handle can be fixed to a positioning board at one position. 2. The fixing position changing means is provided with three fitting holes provided on the same circumference of the positioning base plate with the support shaft as the center, with adjacent center parts having a central angle of about 90 °. And a fitting rod that is fitted to the fitting holes so as to be able to come out and is biased in the fitting direction, and is fixed to the upper end of the fitting rod. The traveling lever device for a mower according to claim 1, wherein the release lever is attached so as to be substantially parallel to the grip portion of the handle.