JP2000188902A - Walking type tillage device for management work - Google Patents

Abstract

(57) [Summary] [PROBLEMS] Conventionally, when using a walk-type cultivator to reciprocate between crops planted in a row while performing tilling and fertilization, a steering handle largely escapes outward during turning. The driver's feet are not stable. SOLUTION: An auxiliary handle is attached to a rear end of a loop-shaped control handle protruding rearward of a walking-type cultivator so as to be able to slide laterally left and right.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tilling apparatus for walking-type management work. The present invention relates to an operation in which a driver walks in the vicinity of the fuselage and performs a driving operation of the fuselage as the fuselage advances, and in particular, an operation for planting crops in a row and running and working along the row. The present invention relates to a device that is intended to improve performance, work accuracy, running performance, and the like.

[0002]

2. Description of the Related Art In a conventional cultivating apparatus for walking-type management work, there is one disclosed in Japanese Utility Model Laid-Open No. 6-81878 as an apparatus for improving operability and running performance. This conventional handle device is an auxiliary handle device, which is provided with an L-shaped rod body provided with a throttle lever and a grip on one side of the body of a unicycle, and is reversible to the left and right to improve maneuverability. ,Also,
The opposite end of the grip is pivoted downward and fixed to form a stand for preventing overturning.

[0003]

In such a conventional apparatus, when reciprocating between crops planted in a row while performing work such as tilling and fertilization, the turning inner wheel side changes right and left with each turning. In each case, the auxiliary handle must be turned from left to right or in the opposite direction, and the operability at the field end is troublesome. There is a disadvantage that the wire of the provided throttle lever is twisted and cut.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve such a drawback of the conventional apparatus, and has taken the following technical means. That is, an engine 2 and a rotary tilling device 3 are provided in a manner to distribute the transmission case 1 in the front-rear direction, and running wheels 4 and 4 are attached to the lower left and right sides of the transmission case 1,
A walking type in which a loop-shaped handle pipe 5 is protruded from the upper part of the transmission case 1 toward the front end or the rear end of the body, and a traveling clutch lever 6 is provided on the protruding side of the handle pipe 5 so as to be swingable in the front-rear direction. A cultivator, which slides laterally in the traveling direction to the vicinity of the protruding end of the handle pipe 5 and has a slide handle 7 having a grip at each of the left and right ends so as to adjust and fix the slide position. When the one-way swing operation of the
The configuration of the cultivator for walking-type management work is characterized in that the operation unit and the slide handle 7 approach a position where they can be simultaneously grasped by one hand.

[0005] Further, a hollow holding pipe 8 is provided at the center in the left-right direction of the protruding distal end handle pipe 5, and a slide handle 7, which is a single member having a predetermined width, is mounted in the holding pipe 8. A walking-type management work tilling device, characterized in that a lock pin 9 that moves in the front-rear direction is attached to a holding pipe 8 having a horizontal direction, and the lock pin 9 is unlocked by a hand movement in the pushing direction of the driver. Configuration.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an embodiment of the present invention, in which a walking type cultivator runs on a field where crops are grown in rows, such as a vegetable field, an orchard, a tea garden, or the like. The present invention is folded around a loop-shaped handle pipe 5 of the machine 10. The walk-behind cultivator 10 has a transmission case 1 disposed substantially vertically at an intermediate portion in the front-rear direction of the fuselage as a main body of a strength member, and a front frame 11 protruding forward at a lower portion of the transmission case 1. The rear end is attached. The upper surface of the front frame 11 is a mounting seat surface, and the engine 2 is mounted so as to be adjustable in the front-rear direction.

A drive spindle 13 connected to a crankshaft protrudes from the left side of the engine 2, and a drive pulley 12 is attached to the drive spindle 13. A shaft end of an input shaft 15 pivotally supported in the left-right direction projects from the upper left side of the above-mentioned transmission case 1, and a driven pulley 14 is attached to the shaft end. A power transmission member 16 (a V-belt in the illustrated example) for transmitting a driving rotation of a V-belt, a flat belt, a rope, a chain or the like is provided between the driving pulley 12 and the driven pulley 14. Installed. The power transmission member 16 is capable of adjusting the tightening force by a tension pulley 17, transmitting power when tightening and disengaging the transmission when loosening, and operates as a clutch. The wire 19 and the spring 20
To move the tension arm 21 upward through the power transmission device 1
Tighten 6.

The drive pulley 2 attached to the engine 2 and the driven pulley 14 attached to the transmission case 1 are separated from each other, and the rotating power transmission tool 16 and the tension pulley 17 are rotated.
The outer periphery is covered with a case 22 made of sheet metal to protect the driver's hands and fingers from the vehicle. A handle frame 23 is provided at an upper end portion of the transmission case 1, and a handle pipe 5 projects from the handle frame 23 obliquely rearward and upward. The protruding rear end side of the handle pipe 5 is a loop-shaped handle connecting left and right.
Around the rear end will be described later in detail.

The transmission case 1 includes therein a speed change portion including a plurality of transmission gears (not shown).
To transmit the rotation of the required gear ratio to the axle 25 at the lower end of the transmission case 1 and drive and rotate the left and right running wheels 4 and 4 attached to the axle 25 projecting left and right, thereby providing a walking type cultivator. 1
0 moves forward in the direction of arrow "a". A hitch 27 is also disposed at the center in the left-right direction at the rear of the transmission case 1 at the center in the left-right direction, and a front wall flange of a drive case 28 of the rotary tilling device 3 is provided at a protruding rear end of the hitch 27. Part is attached.

At the lower end of the drive case 28, a plurality of tilling claws 2 are provided.
9, 29. . . Tilling pipe 30 radially attached
However, the axis of rotation is projected toward the left and right directions of the drive case 28, respectively. When the tilling pipe 30 is driven to rotate, the tilling claw 29 excavates the ground surface. A tillage cover 31 is attached to the tilling claw 29 from above the rotation locus to the back. At the rear end of the tilling cover 31, a rubber droop 32 is hung over the entire tilling width to reduce the scattering of the excavated mud backward. Further, left and right gage wheels 33, 33 are provided at both end portions of the rubber droop 32, respectively.

On the right side between the upper end of the drive case 28 and the upper end of the transmission case 1, a counter case 34 is mounted. The inside of the counter case 34 is not shown, but is a rotary power transmission tool consisting of front and rear sprockets and a chain wound around the outer periphery of the sprocket, and a transmission for a rotary tilling device (not shown) in the transmission case 1. Transmission of neutral or low-speed, high-speed, etc. rotation through the machine. In the neutral state, the tilling claw 29 of the rotary tilling device 3 does not rotate.

The above-mentioned gage wheel 33 is provided at the lower end of the U-shaped support bracket 35 with an opening at the lower end thereof with the left and right gage wheels 33 and 3.
Each of the supporting brackets 3 is rotatably mounted via a shaft pin 38, and furthermore, an intermediate supporting frame 36 is protruded downward from a left-right central portion of the supporting bracket 35, and this intermediate supporting frame is provided. 36 is mounted on a holder 39 provided on a frame 37 of the rotary tilling apparatus 3 so as to be adjustable in height, so that the tilling depth of the rotary tilling apparatus 3 can be changed and adjusted. Reference numeral 40 denotes an adjusting hole, which is formed in a plurality of positions in the vertical direction in the intermediate support frame 36, and adjusts the position of the locking pin 41 to adjust the tilling depth.

As described above, the drive case 28 attached to the hitch 27 projecting rearward from the central portion in the left-right direction from the transmission case 1 serving as the main strength member is also a part of the strength member. I have. The center frame 37 projecting rearward from the center in the left-right direction from the upper portion of the drive case 28, and the holder 39 attached to the rear end of the frame 37 are also strength members. I have. The tillage counter 31 described above uses the frame 37 of the strength member.
The lower case and the upper end of the drive case 28 are attached.

Since the left and right side surfaces of the walk-behind cultivator 10 are uneven, the left and right sides of the body are covered with a foliage cover 42 as shown in FIG. Covers both sides, eliminating sideways protrusions. The leaf protection cover 42 has a substantially U-shape in plan view. An L-shaped front mounting bracket 43 provided in the front end of the front frame 11 and having an L-shape in side view has a U-shape in plan view. The front wall 44 is attached via a fastener such as a bolt or a screw.
The front ends of the left and right side walls 45, 45 are cut off diagonally to form a sloping edge 46 having a boat bottom shape in a side view.
The front opening between the front frame 11 and the slope edge 46 is closed by the left and right blocking plates 47 to prevent the crop from being damaged when moving forward.

Further, between the left and right side walls 45, 45, at a plurality of front and rear portions above the transmission case 1 and on the side of the frame 37 of the rotary tilling device 3, right and left are connected by front and rear connection frames 48, 49. Connected and reinforced. Next, a portion around the handle pipe 5 which is a main part of the present invention will be described mainly with reference to FIGS.

Transmission case 1 which is the main part of the strength member
A handle pipe 5 having a front end attached to a handle frame 23 having a lower portion attached and projecting upward is shown in FIG.
As shown in the enlarged view of FIG. 3, the handle pipes 5 made of a hollow metal are formed by welding and integrating the rear end edges of the handle pipes 5a, 5b divided into right and left with the left and right wall surfaces of the central fitting 54 in a loop shape. And The holding pipe 8 is arranged in the same direction as the axis of the rear end of the handle pipe 5 at the upper rear of the center metal fitting 54 at the center in the left-right direction, and is orthogonal to the axis of the rear end of the handle pipe 5 below the middle metal fitting 54. The support pipe 55 is welded so as to project rearward in the direction, and the members at the rear center are integrated.

Upper and lower slide holes 56 and 57 are opened in the center metal fitting 54 in the longitudinal direction of the axis. The upper slide hole 56 penetrates and opens to the front wall of the holding pipe 8 disposed at the upper rear of the central fitting 54.
A support pipe 55 is welded to the rear part in the outer peripheral direction of the concentric circle with this hole as an axial center position. In addition, a U-shaped slide fitting 58 having a rear opening in a side view is attached to the upper and lower slide holes 56 and 57 so as to be movable in the front-rear direction. The rear end of the upper shaft 58 a of the U-shaped slide fitting 58 can be inserted into the holding pipe 8 as a lock pin 9. The lock pin 9 includes a small diameter portion 9a at the tip and a large diameter portion 9b adjacent to the small diameter portion 9a. A grip ball 59 is attached to the rear end of the lower shaft 58b of the slide fitting 58.

The lower shaft 58b in the aforementioned support pipe 55
An elastic spring 60 is attached to the periphery, and the elastic spring 60 is compressed to a shaft shoulder 64 along a bolt 63 provided at a protruding rear end of the lower shaft 58b by a washer 61 and a nut 62 in a compressed state. Have been. After the ball 59 is screwed, the ball 59 is locked to the tip of the lower shaft 58b by a locking tool 65 such as a roll pin or a retaining ring.

A linear slide handle 7 is inserted into the hollow portion of the holding pipe 8 whose axis is in the left-right direction so as to be able to expand and contract. Rubber grips 50, 50, which are grips, are attached to both ends of the slide handle 7, respectively. 4 on the front wall of the slide handle 7.
, A small hole 51 at the center in the left-right direction and a plurality of small holes 52, 52. . And a narrow groove 5 connecting all the small holes
3 is open.

The center small hole 51 or the side small holes 52, 5
2. . When the large diameter portion 9b of the lock pin 9 is engaged with any one of the above, the large diameter portion 9b and the small holes 51 and 52 are sized so that the slide handle 7 is locked and does not move sideways. . The lock pin 9 moves forward, and the central small hole 51 or the side small holes 52, 52. . When the small-diameter portion 9a of the lock pin 9 is located at any one of the positions, the diameter of the small-diameter portion 9a is smaller than that of the narrow groove 53 of the slide handle 7 so that the slide handle 7 moves sideways along the groove 53. It can move in the expansion and contraction direction in a straight line.

The large diameter portion 9b of the lock pin 9 is disengaged from the small holes 51, 52 of the slide handle 7 when the driver pushes the gripping ball 59 forward against the elastic spring 60. If the pushing amount is too large, the small-diameter portion 9a of the lock pin 9 comes off the slide handle 7, and the slide handle 7 idles and the expansion and contraction to the side is not stabilized. By making the diameter large and making the interval between the washer 61 and the rear end of the support pipe 55 smaller than the length of the small diameter portion 9a in the front-rear direction, it can be used stably.

In contrast to the slide handle 7, which is a single rod in the left and right direction in a substantially straight line in a plan view, the left and right sides of the rear end of the handle pipe 5 escape obliquely about 30 degrees toward the front. A left and right rear portion constitutes a triangular space 66. The handle pipe 5, which has a predetermined width in the width direction linear space A, has a width B to be attached to the handle frame 23 through an inclined space narrower toward the front end.

The front end of the handle pipe 5 is attached to the handle frame 23 by a support shaft 67 such as a bolt or a pin shaft.
The rear end is vertically adjustable. Reference numeral 68 denotes a vertically movable lock pin, which is attached to a holder cylinder 69 below the front end of the handle pipe 5 so as to be able to expand and contract in the front-rear direction. A lever 70 is attached to the front of the right-hand handle pipe 5b in the width direction linear space A, and the lever 70 is operated to move the vertically movable lock pin 68 back and forth through a wire, so that the height of the handle pipe 5 is increased. Can be adjusted in place. Reference numeral 71 denotes a corresponding lock plate, which is provided on the handle frame 23 side.

Further, a throttle lever 72 is disposed in front of the space 66 of the right handle pipe 5b, and by operating the throttle lever 72, the rotation of the engine 2 is adjusted via an interlock (not shown). An engine stop switch 73 is provided in front of the space 66 of the left handle pipe 5a, and the engine 2 can be stopped by pressing the switch 73.

Left and right shafts 74, 74 are provided at the rear end of the width direction linear space A in front of the left and right spaces 66, 66, and the running clutch levers are provided at the shafts 74, 74.
The front end shaft 6 is freely rotatably mounted. The traveling clutch lever 6, which has a U-shaped front opening in plan view, has a rear end portion that can swing up and down at an angle of about 60 degrees, and at the time of the lowest descent operation, as shown in FIG. 7 to the vicinity of the upper surface contact, and the right and left space portions 66, 6
6. It is possible to hold both members simultaneously with one hand behind. The traveling clutch lever 6 has an interlocking connection with a tension arm 21 for operating the tension pulley 17 by a wire 19, and the traveling clutch lever 6 is provided.
Is lowered to the side near the upper surface contact of the slide handle 7,
When the drive pulley 12 rotates between the driven pulley 12 and the driven pulley 14, and the hand is released from the traveling clutch lever 6, the tension of the traveling arm lever is lowered while the tension arm 21 is moved downward by the load of the internal return torque spring 75. Move -6 upward to stop power transmission. Reference numeral 76 denotes a rear end of the wire attachment, which is provided in the middle of the traveling clutch lever 6 on the left side in the front-rear direction, and which is provided at the front of the left handle pipe 5a. It is fixed to.
The outer front portion is attached and fixed near the back surface opening 78 of the case 22, the front end of the wire 19 is inserted into the case 22 from the back surface opening 78, and the spring 20 is opened to set the front end of the wire 19 as described above. It is connected to the tension arm 21.

The traveling clutch lever 6, which has a substantially front opening U-shape in plan view, has a rear left-right operating portion which, as described above, is operated by the slide handle 7 when the clutch is engaged.
The upper portion of the central fitting 54, which is the central portion of the handle pipe 5 in the left-right direction, is positioned forward so that the driver can hold the left and right space portions 66 behind the left and right space portions 66 with one hand. By detouring, the following operations are facilitated.

That is, when traveling between the rows of crops planted side by side and along the rows to the edge of the field, the walk-behind cultivator 10 needs to turn over and make a U-turn to the next row of crops. Come up. Conventionally, it is easy for the driver to move to the next row when the height of the crop in the row of crops is low, but when the height of the crop is high in a densely continuous crop such as tea or orchard, When the vehicle follows the aircraft, the handle pipe 5 makes a large turn when turning and approaches the crop on the side. However, he was forced to take an unstable maneuvering posture, such as stretching his hand only to the side.

When the ball 59 attached to the central part 54 of the handle pipe is pushed forward by the other hand at the time of turning while holding the clutch in the engaged state with one hand, the slide fitting 58 moves forward by the other hand. Slide bracket 58
The large diameter portion 9 b of the lock pin 9, which is a part of the lock pin 9, comes off the small central hole 51 of the slide handle 7. In this state, when the slide handle 7 is slightly moved sideways with the finger of one hand, the groove 53 of the slide handle 7 and the small-diameter portion 9a of the lock pin 9 are engaged, and the slide handle 7 is moved by the imaginary line with the other hand. As shown, it can be easily moved to the large side. The overall width of the slide handle 7 is, as shown in FIG.
The width is wider than the widthwise linear gap A, which is the maximum width of the handle pipe 5, and the grip 50, 50 is projected from at least the left and right sides of the widthwise linear gap A, respectively. The lateral movement of the slide handle 7 is increased to a total width of about 1.5 to 2 times. When turning, the slide handle 7 is moved to the turning inner wheel side, and when the state shown by the imaginary line in FIG. 1 indicates left turn, the traveling clutch lever 6 and the slide handle 7 located in the space 66 of the left handle pipe 5a with the right hand. And the left hand of the slide handle 7 is gripped by the left hand to move forward and turn, so that the driver does not need to make a large rightward movement between the rows of crops, and is easy to run.

[0029]

As described above, the present invention comprises an engine 2 and a rotary tilling device 3 arranged in the front and rear direction of the transmission case 1 so that the traveling wheels 4 are provided on the lower left and right sides of the transmission case 1.
4, a loop-shaped handle pipe 5 is protruded from the upper part of the transmission case 1 toward the front end or the rear end of the body, and the traveling clutch lever 6 is swingable in the front-rear direction on the handle pipe 5 projecting side. A walk-type cultivator provided, wherein the slide handle 7 has a handle slidable laterally in the traveling direction to the vicinity of the protruding end of the handle pipe 5, and has a grip at each of the left and right ends so that the slide position can be adjusted and fixed.
When the one-way swing operation of the traveling clutch lever 6 is performed, the walking-type management work tilling device is characterized in that the operating portion of the traveling clutch lever 6 and the slide handle 7 approach a position where they can be simultaneously gripped by one hand. A unique effect such as That is, after operating the traveling clutch lever 6, the operating section of the traveling clutch lever 6 and the slide handle 7
Can be simultaneously held with one hand, so that the running and tilling running can be performed while the other hand is free during the operation, and each part can be easily operated. Further, since the left and right hand grips are provided at the left and right ends of the slide handle 7, the operator can easily move to the left / right offset position by simply sliding left / right, and the maneuverability is remarkably improved.

Further, a hollow holding pipe 8 is provided at the center in the left-right direction of the protruding tip side handle pipe 5, and a slide handle 7, which is a single member having a predetermined width, is mounted in the holding pipe 8, and a shaft center is provided. A walking-type management work tilling device, characterized in that a lock pin 9 that moves in the front-rear direction is attached to a holding pipe 8 having a horizontal direction, and the lock pin 9 is unlocked by a hand movement in the pushing direction of the driver. When the slide handle 7 is slid, the slide handle 7 can be moved in the gripping direction with one hand while pressing and releasing the lock pin 9 with the other free hand. During this movement, since the slide handle 7 is in the form of a single bar in the horizontal direction, even if the shaft portion at the left and right intermediate portion of the slide handle 7 is moved, or the grip portion at the end of the slide handle 7 is moved, Since it can be moved with substantially the same load and direction, the slide operation can be easily performed without applying excessive force during operation.

[Brief description of the drawings]

FIG. 1 is an overall plan view around a handle pipe as a main part.

FIG. 2 is an enlarged plan view of a main part around a central portion of a rear end of a handle pipe of FIG. 1;

FIG. 3 is an enlarged side cross-sectional view of a main part around a central portion of a rear end of a handle pipe of FIG. 1;

FIG. 4 is a front view of a slide handle as a main part.

FIG. 5 is an overall rear view of a part around both tail wheels, which is another main part.

FIG. 6 is an overall side view of a walking-type tiller.

FIG. 7 is an overall side view showing a state in which a leaf cover is attached.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Transmission case 2 Engine 3 Rotary tilling device 4 Running wheel 5 Handle pipe 6 Running clutch lever 7 Slide handle 8 Holding pipe 9 Lock pin 10 Walking cultivator

Claims (2)

[Claims] 1. An engine 2 and a rotary tilling device 3 are arranged in the front and rear direction of the transmission case 1 and running wheels 4 and 4 are mounted on the lower left and right sides of the transmission case 1, and the upper part of the transmission case 1 is provided. A walking-type tilling machine 10 in which a loop-shaped handle pipe 5 is protruded from a front end or a rear end side of the fuselage, and a traveling clutch lever 6 is provided on a protruding side of the handle pipe 5 so as to be swingable in the front-rear direction, The slide pipe 7 slides laterally in the traveling direction to the vicinity of the protruding end of the handle pipe 5, and a slide handle 7 having a grip at each of the left and right ends is attached so that the slide position can be adjusted and fixed, and the traveling clutch lever 6 swings in one direction. A walking-type maintenance work tilling device, characterized in that, during operation, a traveling clutch lever 6 operating section and a slide handle 7 approach a position where they can be simultaneously gripped by one hand. 2. A hollow holding pipe 8 is provided at a central portion in the left-right direction of the protruding tip side handle pipe 5, and the holding pipe 8 is provided.
A slide handle 7 as a single member having a predetermined width is mounted therein, and a lock pin 9 that moves in the front-rear direction is mounted on a holding pipe 8 having a horizontal axis, and the lock pin 9 is pushed in the direction of the driver. The tillage device according to claim 1, wherein the lock is released by the movement of the hand.