JPH0719A - Mower for reaping inclined plane of levee - Google Patents

Abstract

PURPOSE:To provide the subject mower by supporting a rotatable holding frame on a machine body, sustaining a reaping blade device on the holding frame, weakening forcing spring pressure to bring the bottom of the reaping blade device to an inclined plane with increase of a projected amount of a device, providing uniform contact pressure and giving uniform reaping height. CONSTITUTION:In a mower for reaping an inclined plane of a levee wherein a machine body traveling on the top of a levee is equipped with a reaping blade device for inclined plane reaping, where the attitude of the mower is corrected so as to be along the levee, a holding frame 50 rotatable around the center of a transmission shaft S1 in the longitudinal direction is suspended on the machine body (f) traveling by running wheels 1. A reaping blade device 3 for inclined plane reaping is supported on the holding frame 50 displaceably in the right and left directions. A forcing spring 8 which lifts a part of the holding frame 50 inside site of the transmission shaft S1 of the reaping blade 3 and drops the part at the outside of the reaping blade device 3 from the transmission shaft S1 is connected to the inside site. By action of a hand lever 72 for displacing the spring 8 to the right and left, spring pressure is controlled to be weakened with the enlargement of a projected amount of the reaping blade device 3 to the side of the machine body (f) to make contact pressure constant and to carry out mowing at a uniform reaping height.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mower for slope cutting on a ridge, in which a machine running on the upper surface of the ridge is equipped with a cutting blade device for slope cutting which is in a posture along the ridge. Regarding improvements.

[0002]

2. Description of the Related Art The mowers for cutting slopes on ridges of the above-mentioned form are usually the same as the conventional ones, but they are usually vegetated on the slopes of the ridges on a machine running on the upper surface of the ridges. A reciprocating blade device consisting of a sawtooth-shaped fixed blade and a sawtooth-shaped moving blade that reciprocates by overlapping with the sawtooth-shaped fixed blade is installed on the machine at one end side in the longitudinal direction. Direction so that the lower surface of the cutting blade device is in a posture along the slope, and the bottom surface of the cutting blade device has a constant contact pressure. The spring is used to lift a portion closer to the inner side than the support shaft so that the bottom surface on the outer end side is pressed against the slope by spring pressure.

[0003]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention The mower for slope cutting on the ridge of the above-mentioned form has a problem when the laterally offset amount of the cutting blade device long left and right is made constant. But not
When the offset amount to the side of the fuselage of this long and long cutting blade device for slope cutting is made variable, the cutting blade device that is long to the left and right moves outward from the support shaft with the support shaft in the front-back direction as a reference. By varying the projecting length of the blade, the weight of the portion projecting outward from the support shaft varies, and the lifting action of the spring connected to the inner side of the support shaft of the cutting blade device does not work properly. As a result, the problem arises that the lower surface of the cutting blade device floats up from the slope, making it difficult to mow grass vegetated on the slope.

[0004]

[PROBLEMS] The present invention has been made to solve this problem that has occurred in the conventional means, and a reciprocating cutting blade device, which is long left and right, is provided on the side of a machine body traveling on the upper surface of a ridge. In a grass mower for slope cutting, which is erected so that the projecting end side freely moves up and down around the center of a longitudinal support shaft provided in the machine body in a state of projecting toward one side, a long reciprocating type cutting blade device to the left and right of the mower Even if the projecting length from the side of the machine is variable, the bottom side of the reciprocating blade device, which is long to the left and right, floats above the slope of the ridge or comes into contact with the slope with strong pressure. It is an object of the present invention to provide a new means for contacting a slope with a constant contact pressure so as not to come into contact with the slope.

[0005]

As a means for achieving the above-mentioned object, the present invention equips a machine body traveling by traveling wheels with a support frame which is freely rotatable about a transmission shaft in the front-rear direction. The cutting blade device for slope cutting is movably supported on the support frame so as to be displaceable in the left-right direction, and the cutting blade device is lifted to the inside of the support shaft on the inside of the conduction shaft. By connecting a spring for urging to lower the outer side of the conduction shaft, and operating the hand lever for displacing the spring to the left and right, the overhang amount of the cutting blade device to the side of the machine body is increased. The present invention proposes a mower for slope cutting on a ridge, in which the spring pressure becomes weaker as it increases and the spring pressure becomes stronger as the amount of overhang decreases.

[0006]

Embodiments Next, embodiments will be described in detail with reference to the drawings. Figure 1
FIG. 1 is a side view of a mower A for slope cutting on a ridge where the present invention is implemented, with the engine removed. In the figure, f is a machine body driven by traveling wheels 1, 2 is a cutting blade device for cutting the upper surface of a ridge mounted on the front surface of the machine body f, 3 is a side surface of the ridge projecting to the side of the machine body f The cutting blade device for slope cutting mounted on the machine body f so as to mow the grass.

The cutting blade devices 2 and 3 are a normal reciprocating type cutting blade device in which fixed blades a ... Is.

Then, a cutting blade device 2 for cutting the upper surface of the ridge.
Is supported by a stay 20 fixedly provided on the front side of the machine body f so as to project forward.

Further, the cutting blade device 3 for slope cutting is rotated at the lower end portion of the conductive case 40 of the conductive portion 4 mounted on the machine body f around the conductive shaft S1 as shown in FIG. The support frame 50 is assembled, and the support case 50 is assembled with a conductive case 51 that rotates left and right around the vertical conductive shaft S2. The upper surface of the front end of the conductive case 51 is centered in the vertical conductive shaft S3. A rotating bracket 52 is provided, and the frame of the cutting blade device 3 in which the fixed blades a are integrally assembled is assembled to the bracket 52, thereby supporting the bracket 52 on the machine body f. Then, between the support frame 50 and the bracket 52, a link rod 53 that bends in an arc is spanned and connected so as to be in parallel with the conductive case 51, and the link rod 53 and the conductive case 5 are connected.
1 constitutes a parallel link mechanism, whereby the bracket 52 is moved in parallel to the left and right as shown in FIGS. 3, 4, and 5, and the cutting blade device 3 is moved by this parallel movement. It is configured to be displaced to the left and right, and the amount of lateral extension to the machine body f is changed. Further, the cutting blade device 3 connects an operating arm 54 projecting rearward to a sliding rod c that supports the moving blades b ... And slides left and right on the upper surface of the fixed blade a. On the rear end side of the operating arm 54, a long groove 55 is formed in the front-rear direction at a portion located above the front end side of the conduction case 51 and above the conduction shaft S3.
By fitting a roller 56 that is eccentrically rotated with respect to the shaft S3 by the shaft 3, the roller 56 can be connected to the transmission shaft S3.
By rotating in the form of a crank pin about the shaft center, the operating arm 54 reciprocates left and right to move the sliding rod c and reciprocate the moving blades b ... left and right to perform a reaping operation. .

The link rod 53 and the conductive case 51 are also provided.
The operation of the parallel link mechanism is as follows. The reel R1 on the driven side is integrally connected to the conductive case 51 around the conductive shaft S2 on the base end side of the conductive case 51,
The end portions of the inner wires 60, 60 of the pair of release wires 6, 6 are connected in parallel to the locking portion provided on the front end side portion of the peripheral surface of the driven reel R1 by arranging them in parallel in the circumferential direction. The inner wires 60, 60 are wound around the peripheral surface of the reel R1 so as to face each other in opposite directions, and guided to the rear of the reel R1, and these are supported so as to be rotatable left and right around the conductive shaft S2 as the center of the conductive shaft S2. A machine casing mounted on the rear end of the machine body f by being inserted into the outer metal fittings 61, 61 connected to the outer metal fittings 62, 62 fixedly mounted on the supporting frame 50, and guided to the rear end side of the machine body f. Machine frame 70
The reel R on the drive side, which is mounted so as to protrude from the outer metal fittings 63, 63 fixedly mounted on the bottom wall of the machine frame 70 into the machine frame 70, and is mounted to rotate in the machine frame 70 by the rotation shaft 71 in the left-right direction
Wrap around the circumference of 2 so that they face each other in the opposite direction,
The other ends of the inners 60, 60 are connected to locking parts provided in parallel on the upper surface side of the peripheral surface of the reel R1 on the driving side, whereby the lower end of the rotary shaft 71 is connected. The conductive case 51 is rotated left and right by operating the handle lever 72 connecting the two sides to rotate the drive side reel R2 and the driven side reel R1. The turning of the handle lever 72 and the turning of the conductive case 51 in the left-right direction are performed by turning the handle lever 72 forward to bring it to the state shown in FIG.
When 1 moves to the left as shown in FIG. 4 to increase the amount of protrusion of the cutting blade device 3 to the side of the machine body f, and the handle lever 72 is rotated so as to be tilted rearward, the conductive case 51 moves to the right as shown in FIG. It is set so as to move toward the side to reduce the amount of protrusion of the cutting blade device 3 to the side of the machine body f.

The machine frame 70 has a handle lever 7
2 is provided with a fan-shaped engaging plate 74 in which the engaging grooves 73 are arranged side by side in a saw-tooth shape at a position located on the side of the rotational locus, and the handle lever 72 is provided at a position facing the engaging groove 73. An engaging protrusion 75 that selectively engages with the engaging groove 73 is provided, and further, a shaft cylinder portion 720 is provided on the lower end side of the handle lever 72, and the connecting metal fitting is connected to the rotating shaft 71. The axis of the shaft 76 that can be supported on the shaft 76 is inserted into the shaft 77 which is orthogonal to the axis of the rotary shaft 71, and the handle lever 72 is tilted about the shaft 77. , The engaging projection 75 provided on the handle lever 72 is fitted into a desired engaging groove 73 ... And rotated by the rotation of the reel R2 on the drive side.
Is locked in that position.

A support frame 5 which supports the cutting blade device 3 for slope cutting and swings and pivots about the transmission shaft S1 in the front-rear direction.
Cutting blade device 3 for supporting a portion inside the transmission axis S1 of 0
The spring 8 to be lifted is closer to the inner side than the conduction axis S1 of the support frame 50 in a front view so that the bottom surface on the outer end side of the conduction axis S1 which is a support axis of the supporting frame 50 contacts the slope with a constant pressure. When a suspension rod 80 is provided so as to project rearward in a side view and the spring 8 is provided between the suspension rod 80 and the machine body f so as to be lifted upward, the outer rod 8 is attached to the suspension rod 80.
Release wire 81 consisting of 10 and inner 811
One end side of the inner 811 of the inner part 811 is connected so as to be pulled upward, and the other end side of the inner part 811 of the inner part 811 is connected to the body f by fixing outer metal parts 812 and 812 to the outer part 810.
This guides the handle lever 72 mounted on the machine frame 70 of the above-mentioned machine casing to a position on the front surface side, and projects forward to a portion closer to the other end side of the inner 811 and the base end side of the handle lever 72. The spring 8 is formed as a coil spring between the connecting member 721 and the connecting member 721.

As a result, the handle lever 72
Is rotated forward to increase the lateral projection length of the cutting blade device 3 for slope cutting, which is the lateral extension of the machine body f, the spring 8 which is a coil spring To reduce the spring pressure of the spring 8 that lifts the suspension rod 80, and to reduce the pressure that pushes the bottom surface of the cutting blade device 3 toward the slope of the ridge. become. Also,
By rotating the handle lever 70 rearward, the cutting blade device 3 is brought inward with respect to the transmission shaft S1, and the protruding length of the body f from the transmission shaft S1 serving as a support shaft of the cutting blade device 3 to the outside is adjusted. When shortened, the connecting member 721 is displaced rearward by the rearward rotation of the handle lever 72, pulling the coiled spring 8 rearward, increasing its spring pressure, and cutting blade. The pressure for pushing down the bottom surface of the bottom surface of the device 3 is increased.

In the drawings, 10 is an engine bed for assembling the engine to the machine body f, 11 is a handle stay provided at the rear end of the machine body f, and 12 is a handle rod.

[0015]

As described above, the lawn mowing machine A for slope cutting according to the present invention projects in the lateral direction of the machine body f, and the transmission shaft S1 in the front-rear direction in which the base end side in the projecting direction serves as the spindle. Cutting device 3 for slope cutting mounted on a body f so as to be rotated by
So that the bottom side of it contacts the slope of the ridge,
The spring pressure of the spring 8 that urges the side projecting to the side of the fuselage f to the descending side with respect to the conduction shaft S1 serving as the supporting shaft of the cutting blade device 3 for slope cutting extends laterally. It becomes weaker as the length becomes longer and becomes stronger as the overhang length becomes shorter. Therefore, the overhang length of the cutting blade device 3 for slope cutting to the side of the machine body f. The contact pressure against the slope of the ridge on the bottom side of the cutting blade device 3 is automatically maintained at a substantially constant value even when the cutting blade device 3 is changed, so that it corresponds to the vertical length of the slope of the ridge. By doing so, the cutting height when the overhanging length of the cutting blade device 3 for slope cutting is changed becomes stable.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view of a main part of a lawn mower for practicing the present invention.

FIG. 2 is a partially cutaway front view of the above mower.

FIG. 3 is a plan view of a support mechanism portion of a cutting blade device for slope cutting of the same mower.

FIG. 4 is an explanatory view of an operation in a state in which a supporting mechanism portion of the above-mentioned cutting blade device is enlarged in a lateral amount of the cutting blade device.

FIG. 5 is an explanatory view of the operation of the same supporting mechanism portion in a state where the amount of protrusion of the cutting blade device to the side of the machine body is reduced.

[Explanation of symbols]

A ... Mower, a ... Fixed blade, b ... Moving blade, c ... Sliding rod, f ...
Airframe, S1, S2, S3 ... Transmission shaft, R1, R2 ... Reel, 1 ... Running wheel, 10 ... Engine bed, 11 ... Handle stay, 12 ... Handle rod, 2 ... Cutting blade device for cutting upper surface, 20 ... Stay 3 ... Cutting blade device for slope cutting, 4 ... Conductive part, 40 ... Conductive case, 50 ... Support frame, 51 ... Conductive case, 52 ... Bracket, 53 ... Link rod, 54 ...
Operating arm, 55 ... Long groove, 56 ... Roller, 6 ... Release wire, 60 ... Inner, 61 ... Outer, 62 ...
63 ... Outer metal fittings, 70 ... Machine frame, 71 ... Rotating shaft, 72
... Handle lever, 720 ... Shaft cylinder part, 721 ... Connecting member, 73 ... Engagement groove, 74 ... Engagement plate, 75 ... Engagement projection, 7
6 ... Connection metal fittings, 77 ... Spindle, 8 ... Spring, 80 ... Suspension rod, 8
1 ... Release wire, 810 ... Outer, 811 ... Inner, 812 ... Outer fitting.

Claims (1)

[Claims] 1. A support frame 5 which is freely rotatable about a transmission shaft S1 in the front-rear direction of an airframe f traveling by traveling wheels 1.
0, the cutting blade device 3 for slope cutting is movably supported on the support frame 50 so as to be displaceable in the left-right direction, and the support frame 50 is located inside the conduction shaft S1 and inside the support frame 50. By connecting a spring 8 for urging the cutting blade device 3 to lower the outside of the conduction shaft S1 of the cutting blade device 3, and activating the hand lever 72 for displacing the spring 8 left and right. The spring pressure becomes weaker as the overhanging amount of the cutting blade device 3 to the side of the machine body f is increased, and the spring pressure becomes stronger as the overhanging amount is decreased. Mower.