JP2002165509A - Handle length regulator for walking-type mower - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a handle length regulator for a walking-type mower, having smooth operability with a simple construction. SOLUTION: This handle length regulator has such a scheme that an inner cylinder 7 is slidably fitted into the outer cylinder 6 on the basal side of a handle rod 5, wherein the inner cylinder 7 is provided with fitting grooves 8, and a seizing element 9 is fitted through the grooves 8; the seizing element 9 is press-fixed or unfixed by the aid of a fixing gear 12 attached to a detachable cover 11 provided on the outer cylinder 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a walking type mower, and more particularly to a handle rod length adjusting device.

[0002]

2. Description of the Related Art A so-called slope mower, which is a walking mower capable of cutting weeds on a long slope, has been developed by the present applicant and disclosed in Japanese Patent Application Laid-Open No. Hei 10-201330. Have been.

[0003]

In this type of walk-behind mower, the shorter the handlebar is easier to operate during normal mowing on a flat ground, but when mowing grass on a long slope,
Especially when the mowing machine is driven along the contour line and mowing is performed by manipulating the handle turned to the side of the aircraft while walking on the upper ridge, the mowing range is as long as the handle rod is as long as possible. Become wider. Therefore, it is necessary to adjust the length of the handle rod, and it is desired that the adjustment mechanism be simple and easy to operate. The present invention is intended to solve such a problem.

[0004]

Means for solving the problems A handlebar 5 which can be adjusted vertically and horizontally is mounted on the upper part of the body of a mowing machine comprising a prime mover 1, a gear box 2, a driving wheel 3 and a mowing portion 4 driven by these components. In a walking mower that extends rearward and upward, the handle rod 5 is divided into an outer cylinder 6 and an inner shaft 7 and slidably fitted to adjust the length of the handle rod 5. The inner shaft 7 is formed with a fitting groove 8 in the longitudinal direction,
A key-shaped locking body 9 thicker than the groove depth and longer in the groove direction is fitted into the fitting groove 8, and a protruding portion of the locking body 9 is fitted into a fitting hole 10 formed in the outer cylinder 6. Further, a handle length adjusting device for a walking type mowing machine comprising a fitting 12 capable of closing the fitting hole 10 and attaching and detaching the locking body 9 to a cover 11 detachably attached to the outer cylinder 6 is provided. Configuration. A handlebar 5 that can be adjusted vertically and horizontally is extended rearward and upward on the upper part of the body of a mowing machine including a motor 1, a gear box 2, a driving wheel 3 driven by the gearbox 2, a mowing unit 4, and the like. The handle bar 5 is divided into an outer cylinder 6 and an inner shaft 7 so as to be slidably fitted therein so that the length of the handle bar 5 can be adjusted. A plurality of wires connecting each operation lever provided on the 13th portion and each operation portion on the main body side are housed in the corrugated tube 14, and a coil spring and an elastic support extending from an end of the coil spring and forming a receiving portion at a tip end are provided. The coil length of the coil spring of the body 15 is fixed rearward and upward, and the intermediate portion of the corrugated tube 14 is held by the receiving portion. Motor 1
, Gear box 2 and driving wheel 3 driven by these
In a walking type mowing machine having a handlebar 5 which is rotatable in the vertical and horizontal directions extending upward and rearward on the upper part of the body of the mower comprising a mowing part 4 and the like, the handlebar 5 is connected to an outer cylinder 6.
And the inner shaft 7 is slidably fitted to adjust the length of the handle rod 5 so that the operating lever provided on the operating handle 13 of the handle rod 5 and the operating part on the main body side are connected by wires. Attach to the body with the coil spring and the coil spring part of the elastic support body 15 extending from the end of the coil spring and forming the receiving part at the tip being directed upward, and supporting the middle part of the wire by the receiving part. The configuration of the handle length adjusting device of the walking type mower

[0005]

According to the first aspect of the present invention, the cover 11 of the outer handle 6 of the handlebar 5 is selected according to the working conditions.
Is loosened, the fixed state of the locking body 9 fitted into the fitting groove 8 of the inner shaft 7 is released. In this state, the inner shaft 7 and the outer cylinder 6 are slidably adjusted to thereby adjust the handle rod 5.
Is adjusted. At the time of this sliding adjustment, the portion of the locking body 9 protruding from the fitting groove 8 of the inner shaft 7 is fitted and held in the fitting hole 10 of the outer cylinder 6, and the inner shaft 7 is a key-shaped engaging member elongated in the adjusting direction. Restriction is proposed by the stopper 9 so that the movement can be adjusted smoothly. When the adjustment is completed, when the fixing tool 12 attached to the cover 11 is tightened, the locking body 9 is pressed against the fitting groove 8 of the inner shaft 7, and the outer cylinder 6 and the inner shaft 7 connect the locking body 9 and the cover 11 to each other. The fixing operation can be easily and reliably performed. Further, at the time of maintenance or assembly, if the cover 11 that is fixed to the outer cylinder 6 is removed, the fixing tool 12 can be removed together with the cover 11. After that, the locking body 9 is removed from the fitting hole 10 of the outer cylinder 6. If it is pulled out, the inner shaft 7 and the outer cylinder 6 can be separated, and disassembly and assembly are easy.

As described above, according to the present invention, the handle rod 5 provided on the upper part of the main body of the mower so as to be rotatable vertically and horizontally, and the outer cylinder 6 and the inner shaft 7 of the handle rod 5 are slid. Since the handle rod 5 is movably fitted and the length of the handle rod 5 can be adjusted, a mowing operation suitable for all working conditions can be performed. In particular, when the operator performs mowing work on the lower slope while walking on the upper furrow, the mowing machine main body is driven along the contour line, and the handle bar 5 is turned to the side of the body, In addition, the steering rod 5 corresponds to the steering position.
Is rotated up and down to perform the operation, and when the lower slope is cut, the cutting range can be extended by adjusting the length of the handle bar 5.

According to the second aspect of the present invention, a plurality of wires for connecting the respective operating levers provided on the operating handle 13 of the handlebar 5 and the respective operating portions on the main body are housed in the corrugated tube 14. At the same time, the coil spring portion of the elastic support 15 extending from the end portion of the coil spring and forming the receiving portion at the distal end thereof is fixed obliquely upward, and the receiving portion holds the middle portion of the corrugated tube 14. When adjusting the length of the handle bar 5, a plurality of wires are gathered in the corrugated tube 14, and in this state, the corrugated tube 14 is handled by the elastic support 15 which is fastened rearward and upward when the handle bar 5 is shortened. The corrugated tube 14 is hung above the rod 5 without slack, and when the handle rod 5 is extended, the corrugated tube 14 is held against the elastic force of the elastic support 15. Rod 5 can be positioned along the top surface, it can always be secured satisfactorily operability by a plurality of operation levers and wires. According to the third aspect of the present invention, the operation lever provided on the operation handle 13 of the handle rod 5 is connected to the operation part on the main body side by a wire, and the coil spring and the receiving part extending from the end of the coil spring and receiving at the tip end are provided. Since the coil spring portion of the elastic support body 15 forming the above is attached to the body with the coil spring portion being directed upward and the intermediate portion of the wire is supported by the receiving portion, when adjusting the length of the handle bar 5, When the handlebar 5 is shortened, the wire is hung above the handlebar 5 without slack, and when the handlebar 5 is extended, the wire is positioned along the handlebar 5 against the elastic force of the elastic support 15. It is possible to maintain smooth operability without being locked or entangled with other members.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the illustrated embodiment, a walking type mowing machine is provided with a mowing portion 4 at the front of the body, and the mowing portion 4 and the driving wheels 3 can be driven via a gearbox 2 from a motor 1 mounted at the rear. And a handlebar 5 extends rearward and upward at the upper part of the fuselage. A transmission shaft cylinder 16 and a support rod 17 extend from the gearbox 2 at the center of the body toward both sides, and a transmission case 18 and a support frame 19 hang down from the ends thereof. Is rotatably supported.
A mounting frame 20 extends forward from a lower portion of the gear box 2, and a cover 2 of the reaper 4 is provided on a lower surface of the mounting frame 20.
1, and a central portion of a horizontally long transmission case 22 is attached to the end thereof. The transmission case 22 is formed to be horizontally long in the left-right direction along the cover 21, and has drive shafts 23, 23 hanging down from the left and right. , 24, respectively, so that the front sides of the left and right cutting blades 24, 24 when viewed from above rotate toward the center, and cut while weeding the weeds to the center.

A pulley 25 is attached to an output shaft 26 below the gear box 2. A belt 28 is wound between the output shaft 26 and the pulleys 27 attached to the drive shafts 23. , 24 are driven. A mounting base 29 is mounted on the upper part of the gear box 2, and a handle base 30 is mounted on the mounting base 29 so as to be horizontally rotatable around a vertical axis 59. Reference numeral 31 denotes a fixture for fixing the horizontal rotation position of the handle base 30 with respect to the mounting base 29. The operation of the handle rotation lever 32 described below causes the pin 57 at the tip to be engaged with the engagement hole of the lower locking plate 58. It is configured to be disengageable.

The upper extension 33a of the handle base 30 pivotally supports the outer cylinder 6 of the handle rod 5 with a horizontal axis 43, and the fixture 33 adjusts the inclination of the handle rod 5 with respect to the handle base 30 in the vertical direction. Adjustable and fixable. That is, a locking plate 35 forming a plurality of engaging recesses 34 in a vertical direction in a fan-shaped gear shape is welded to the base of the outer cylinder 6 of the handlebar 5,
A fixture 33 provided on the engagement recess 34 and the handle base 30
The inclination of the handlebar 5 is adjusted and fixed by the engagement and disengagement of the pin 36, and the adjustment range is set in a range of about 100 degrees from a position further below the state parallel to the running surface to a substantially vertical position. The handle rod 5 includes the above-described outer cylinder 6 and an inner shaft 7 that is slidably fitted into the outer cylinder 6, and has a loop-shaped operation handle 13 at the end. The operating handle 13 is configured to be rotatable with respect to the inner shaft 7 by loosening the fastener 37, and extends at a position perpendicular to the inner shaft 7 and at the same angle as the inner shaft 7. Adjustable between posture.

Reference numeral 38 denotes an accelerator lever, which is rotatably supported by the base of the operation handle 13 and extends in an L-shape along one side of the grip 39 from one side of the loop-shaped operation handle 13. The operating arm 40 and the governor of the prime mover 1 are connected by a wire 41. Note that a centrifugal clutch 42 is provided between the prime mover 1 and the gear box 2.
2 operates to transmit power to the gearbox 2. Therefore, the accelerator lever 38 also has a function as a clutch for power continuation. A traveling clutch lever 44 operates a clutch (not shown) at the base of the transmission case 18 via a wire 45 to intermittently drive the driving wheels 3. Reference numeral 32 denotes a handle turning lever, which is configured to actuate the fixing tool 31 via a wire 46 so that the handle base 30 can be turned horizontally and horizontally with respect to the mounting base 29. The movable range in the left-right direction of 5 is 90 degrees. Reference numeral 47 denotes a handlebar vertical movement lever, which is provided on the lower surface of the inner shaft 7 of the handlebar 5, and operates the above-mentioned fixture 34 via a wire 48 to adjust the vertical angle of the handlebar 5 with respect to the handle base 30. Adjust.

The wire 45 of the traveling clutch lever 44, the wire 46 of the rotary lever 32, the wire 48 of the vertical movement lever 47, and the wire 41 of the accelerator lever 38 are collectively housed in the corrugated tube 14, One end of this corrugated tube 14 is the inner shaft 7
The other end is attached to the outer cylinder 6 base. The wires and the corrugated tube 14 correspond to the length when the inner cylinder 7 is pulled out from the outer cylinder 6 and the length of the handle rod 5 is adjusted to the longest. After that, it is hung without looseness by the elastic support 15 described below. A round shaft 49 is welded near the base of the outer cylinder 6 so as to be directed upward and rearward. A coil spring portion 50 of a support plate 15 formed of a piano wire is fitted to the round shaft 49 and one end thereof is moved rearward. A receiving portion 51 extending upward and having a ring-shaped tip.
Holds the middle part of the corrugated tube 14.
Therefore, when the handle rod 5 is expanded and contracted,
1, 45, 46, and 48 are gathered in the corrugated tube 14, and in this state, when the handlebar 5 is shortened, the corrugated tube 14 is fixed to the outer cylinder 6 upward and rearward by the elastic support 15 so that the corrugated tube 14 is located above the handlebar 5. The corrugated tube 14 can be positioned along the upper surface of the handle rod 5 against the elastic force of the elastic support rod 15 when the handle rod 5 is extended. Operability can always be ensured.

Next, a mechanism for adjusting the expansion and contraction of the handle rod 5 will be described. First, a fitting groove 8 having a necessary length for adjustment is formed on the back side of the inner shaft 7, and the fitting groove 8 is thicker than the depth of the groove 8 in the fitting groove 8. An elongated key-shaped locking body 9 is fitted in the groove direction. Outer cylinder 6
A fitting hole 10 is formed in the vicinity of the distal end of the locking member 9 so as to correspond to a protruding portion of the locking body 9 from the fitting groove 8. , 52 are detachably provided on the outer cylinder 6. A weld nut 53 is welded to the cover 11, and a fixture 12, specifically, a knob bolt 12 is screwed into the weld nut 53, so that the locking body 9 can be fixed by crimping. Reference numeral 54 denotes a locking spring, and reference numeral 55 denotes a rubber packing, which prevents dust from entering the fitting groove 8 or the like.
The structure of the inner shaft 7 against the outer cylinder 6 is restricted by contact of the engagement member 9 with the end of the insertion groove, and a corner portion for preventing deformation of the end of the insertion groove 8 due to the engagement of the engagement member 9. Is chamfered 56.

Accordingly, the fixture 12 is loosened according to the working conditions, and the fixed state of the locking body 9 fitted into the fitting groove 8 of the inner shaft 7 is released. In this state, the inner shaft 7 is pulled out from the outer cylinder 6. Alternatively, the length of the handle rod 5 is adjusted by pushing the handle. When the inner shaft 7 moves, the locking member 9 is inserted into the fitting groove 8 of the inner shaft 7.
A portion protruding from the inner cylinder 7 is fitted and held in a fitting hole 10 of the outer cylinder 6, and the inner shaft 7 is regulated by an elongated key-shaped locking body 9 in the adjusting direction, so that the inner shaft 7 can be smoothly moved and adjusted. When the adjustment is completed, when the fixing tool 12 attached to the cover 11 is tightened, the locking body 9 is pressed against the fitting groove 8 of the inner shaft 7 to press the outer cylinder 6 and the inner shaft 7.
Can be fixed via the locking body 9 and the cover 11, and the adjustment and fixing operation can be easily and reliably performed.

At the time of maintenance or assembling, the fixing member 12 can be removed together with the cover 11 by removing the cover 11 fixed to the outer cylinder 6.
If the inner shaft 7 is pulled out from the fitting hole 10 to the outside, the inner shaft 7 can be pulled out from the outer cylinder 6 and disassembly and assembly are easy. Furthermore,
Since these expansion and contraction adjustment mechanisms are provided on the back side of the handlebar 5, it is possible to prevent intrusion of dust and the like, and at the same time, the corrugated tube 14 corresponding to this expansion and contraction,
The suspension mechanism by the support rod 17 is separately disposed on the upper surface side of the handle rod 5, and their operability is also good. FIG. 8 shows a third embodiment of the present invention.
8 independently supports the wire 41 by the elastic support 15. Reference numeral 60 denotes a guide pipe, and a stop 61
The wire 41 is fixed to the prime mover 1 to guide the wire 41 therein, and the coil spring portion 50 of the elastic support 15 is fitted around the wire 41, and the intermediate portion of the wire 41 is received at a position above the handle rod 5. It is suspended by the part 51. Therefore, when the handle rod 5 expands and contracts, the wire 41 is guided without being slackened and without being locked or entangled with other members, similarly to the action of the elastic support body 15 for suspending the corrugated tube 14 described above. This ensures smooth operability.

In the illustrated example, the base side of the handlebar 5 is formed as an outer cylinder 6 and the adjustment side is formed as an inner shaft 7. However, the base side of the handlebar 5 is formed as an inner shaft 7 and the adjustment side is formed as an outer cylinder. The same applies to the configuration of FIG.

[0017]

[Brief description of the drawings]

FIG. 1 is an overall plan view.

FIG. 2 is a partial side sectional view.

FIG. 3 is a plan view of a main part.

FIG. 4 is a side view of a main part.

FIG. 5 is a side view of a main part with the handle rod extended.

FIG. 6 is a side sectional view of a main part.

FIGS. 7A and 7B are a side sectional view and a front sectional view showing a handlebar telescopic mechanism;

FIG. 8 is a side view of a main part.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 prime mover 2 gear box 3 drive wheel 4 mowing part 5 handle rod 6 outer cylinder 7 inner shaft 8 fitting groove 9 locking body 10 fitting hole 11 cover 12 fixing tool 13 operating handle 14 corrugated tube 15 elastic support

Claims (3)

[Claims] 1. A mowing machine comprising a prime mover (1), a gear box (2), a driving wheel (3) driven by the motor, a mowing part (4), and the like, is rotatable in the vertical and horizontal directions. In a walking type mowing machine having a handlebar (5) extending rearward and upward, the handlebar (5) is divided into an outer cylinder (6) and an inner shaft (7), and the handlebar is slidably fitted therein. To make the length of the rod (5) adjustable, a fitting groove (8) is formed in the inner shaft (7) in the longitudinal direction, and the groove direction is thicker in the fitting groove (8) than the groove depth. Long key-shaped locking body (9)
And the projection of the locking body (9) is fitted into a fitting hole (10) formed in the outer cylinder (6), and further, the fitting hole (10) is closed to close the outer cylinder ( A fixing device (1) capable of pressing and fixing the locking body (9) to a detachable cover (11) in (6).
2) A handle length adjusting device of a walking type mower equipped with 2). 2. A mowing machine comprising a prime mover (1), a gear box (2), a driving wheel (3) driven by the motor, a mowing part (4), and the like, is rotatable in the vertical and horizontal directions. In a walking type mowing machine having a handlebar (5) extending rearward and upward, the handlebar (5) is divided into an outer cylinder (6) and an inner shaft (7), and the handlebar is slidably fitted therein. In order to configure the length of the rod (5) to be adjustable, a plurality of wires connecting each operation lever provided on the operation handle (13) of the handle rod (5) and each operation section on the main body side are connected to the corrugated tube ( 14), the coil spring portion of the elastic support body (15) extending from the end of the coil spring and forming the receiving portion is fixedly fastened rearward and upward, and the corrugated tube ( Step 14) holding the middle part of step 14) Type mower handle length adjustment device. 3. A mowing machine comprising a prime mover (1), a gear box (2), a driving wheel (3) driven by the motor, a mowing part (4), and the like, is rotatable in the vertical and horizontal directions. In a walking type mowing machine having a handlebar (5) extending rearward and upward, the handlebar (5) is divided into an outer cylinder (6) and an inner shaft (7), and the handlebar is slidably fitted therein. In order to adjust the length of the rod (5), an operation lever provided on the operation handle (13) of the handle rod (5) is connected to an operation part on the main body side by a wire, and a coil spring and an end of the coil spring are connected. Handle of a walking type mowing machine attached to the body with the coil spring portion of the elastic support body 15 extending from the portion and forming a receiving portion at the tip directed upward, and the intermediate portion of the wire supported by the receiving portion. Length adjustment device.