JP3288596B2 - Walking mower for two-sided mowing - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a road surface cutting device for cutting grass grown on a road surface, which is connected to a front portion of a traveling machine body. The present invention relates to a walking mower for two-side mowing, in which a slope mowing device for mowing grass growing on an inclined surface connected to one side end is connected.

[0002]

2. Description of the Related Art Conventionally, a walk-behind mower for two-side mowing as described above has been disclosed, for example, in Japanese Utility Model Laid-Open Publication No. 61-95229. The front upper end of the reaper is connected to one side end of the road reaper so as to be swingable back and forth, and the rear upper end of the sloping reaper and one side of the traveling body are turnbuckle-type lengths. The distance between the rear upper end of the sloping reaper and one side of the traveling body is changed by operating the length adjusting mechanism to connect the sloping reaper to the road surface. There has been a configuration in which the cutting width of the sloping reaper can be changed by swinging back and forth (posture change) about a connection fulcrum with one side end of the device.

[0003]

However, in the above-mentioned prior art, the connecting fulcrum of one side end of the road surface reaping device set at the upper end of the front part of the sloping reaper is connected to the slope reaper. Since the fulcrum is used as a swinging fulcrum when changing the cutting width, for example, an inclined posture in which the cutting width of the slope cutting device is the narrowest (a posture in which the two rotating blades are arranged substantially in a straight line along the longitudinal direction of the fuselage). ), One side end of the road surface reaper and a rotating blade of the side surface reaper adjacent to the one side end so that there is no uncut portion between the road surface reaper and the side surface reaper. Is set to be in the state of closest approach, the posture of the sloping reaper is adjusted to the vertical position where the cutting width is widest (in a direction where the two rotating blades are orthogonal to the longitudinal direction of the fuselage). (A straight line) From one side end of the road surface mowing device, the rotating blades of the side surface mowing device adjacent to the one side end are separated from each other, so that uncut leaves are generated between the road surface mowing device and the side surface mowing device. Had become. Conversely, in the vertical position where the cutting width of the slope reaping device is the widest, one end of the road surface reaping device is arranged so that there is no uncut portion between the road surface reaping device and the slope reaping device. And the rotating blades of the slope reaper adjacent to one side end thereof are set to be in a state of being closest to each other, the slope of the slope reaper is inclined to the position where the cutting width is narrowest. , The rotating blade of the slope reaping device adjacent to one side end of the road surface reaping device further approaches one side edge, and the cutting blade of the road surface reaping device and the slope reaping device Inconvenience of contact with the rotating blade has been caused.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a walking mowing machine for two-sided mowing in which a slope mowing device having a plurality of rotating blades is connected to one end of the road mowing device. The cutting width of the slope reaper is changed without any inconvenience, such as uncut residues between the reaper and the cutting blade of the road reaper and the rotating blade of the reaper. To be able to do it.

[0005]

In order to achieve the above object, according to the first aspect of the present invention, in a walking type mowing machine for two-side mowing, a road surface for cutting grass grown on a running road surface. And a slope cutting device for cutting grass growing on an inclined surface connected to one end of the road surface, to one end of the road cutting device. And, for the first mowing portion having the first rotating blades disposed adjacent to the road surface mowing device, the second mowing portion having a plurality of rotating blades arranged in parallel, the first mowing portion of the first mowing portion The slope cutting device is constituted by being connected swingably back and forth around the drive shaft center of the first rotating blade, and each rotating blade of the second cutting unit is linearly arranged immediately after the first cutting unit. Minimum cutting width of the slope cutting device aligned rearward In was configured to cutting grass discharge path is formed between the traveling machine body and said second cutting portion.

According to the first aspect of the present invention, the second mowing portion is arranged around the drive shaft of the first rotary blade of the first mowing portion with respect to the first mowing portion disposed adjacent to the road surface mowing device. By oscillating in the front-rear direction, the cutting width of the slope cutting device can be changed. For example, the second mowing portion is rocked in the front-rear direction with respect to the first mowing portion so that the first mowing portion and the second mowing portion are aligned on a straight line in a direction orthogonal to the longitudinal direction of the body. Thereby, it becomes possible to set the cutting width of the slope cutting device to be the widest. In addition, the second reaper is pivotally displaced in the front-rear direction with respect to the first reaper so that the first reaper and the second reaper are aligned in a straight line along the longitudinal direction of the body. The cutting width of the surface reaping device can be set to be the narrowest. Further, the second mowing portion is swung in the front-rear direction with respect to the first mowing portion so that the first mowing portion and the second mowing portion are aligned with a desired inclination angle with respect to the longitudinal direction of the machine. By performing the dynamic displacement, the cutting width of the slope cutting device can be set to a desired cutting width.

Further, the cutting width of the slope cutting device is changed by the swinging displacement of the second cutting portion in the front-rear direction with respect to the first cutting portion, so that the cutting width of the slope cutting device is changed. Irrespective of the change, the distance between one side end of the road surface reaping device and the first reaping portion of the side surface reaping device arranged adjacent to the one side end can always be kept constant. That is, the one-side end of the road-side reaper and the first reaping portion of the side-surface reaper arranged adjacent to the one-side end are left uncut between the road-side reaper and the side-surface reaper. When approaching the state where there is no, regardless of the cutting width change of the slope reaper,
Since the proximity state can always be maintained, with the cutting width change of the slope reaping device, one side end of the road surface reaping device and a slope reaping device arranged adjacent to the one side end and When the distance of the road surface changes, uncut leaves occur between the road-side reaping device and the slope-side reaper, or the cutting blade of the road-surface reaper and the rotating blade of the slope-side reaper come into contact with each other. It is possible to eliminate the inconvenience of being damaged.

In addition, the cutting width of the slope cutting device is changed by the swinging displacement of the second cutting portion in the front-rear direction with respect to the first cutting portion. When the cutting width of the slope reaper is manually changed, the cutting width of the slope reaper is changed as compared to the configuration in which the cutting width of the slope reaper is changed by changing the posture of the hill. In the case where the cutting width of the slope cutting device is changed using an actuator, a small actuator can be used. It is possible to reduce the size and weight of the surface mowing device and to reduce the manufacturing cost.

In addition, when the slope cutting device is in the minimum cutting width state, a cut grass discharge path is formed between the traveling body and the second cutting portion, so that the road cutting device and the first cutting portion are formed. Even if the cut grass is cut off between the road body cutting device and the first cutting section, and is discharged between the traveling body and the second cutting section at the rear thereof, the traveling body and the second cutting section Can be prevented from occurring when the cut grass discharge path is not formed between the second cutting unit and the cut grass discharged between the traveling body and the second cutting unit due to the action of the rotating blade of the second cutting unit. Become like

[0010] Therefore, uncut leaves occur between the road surface reaping device and the slope reaping device, or the cutting blade of the road surface reaping device and the rotating blade of the slope reaping device come into contact with each other and become damaged. It is possible to change the cutting width of the slope reaper without the inconvenience, and to reduce the labor required when changing the cutting width of the slope reaper, or to reduce the size and weight of the slope reaper and to reduce the manufacturing cost. Can be planned,
Furthermore, the scattering of the cut grass by the rotating blades of the second cutting unit in the minimum cutting width state of the slope cutting device can be prevented.

In the invention according to claim 2 of the present invention,
In the invention according to claim 1, each rotary blade of the second reaping section is formed to have a smaller diameter than the first rotary blade.

According to the second aspect of the present invention, a simple operation of swinging the second cutting unit around the axis of the first rotating blade of the first cutting unit and positioning the second cutting unit behind the first cutting unit. Thus, while the minimum cutting width of the slope cutting device, while the respective cutting blade of the second cutting unit is not exposed to the laterally outer side than the lateral outer end of the first rotating blade, the cutting width of the first cutting unit, A cut grass discharging path can be formed between the traveling body and the second cutting unit.

By the way, when each rotary blade of the second mowing portion is formed to have the same diameter as the first rotary blade, the second mowing portion is simply swung around the axis of the first rotary blade of the first mowing portion. Then, when the cut grass discharge path is formed between the traveling machine and the second cutting unit by an operation only to be positioned behind the first cutting unit, each rotating blade of the second cutting unit is rotated by the first rotating blade. , So that the minimum cutting width of the slope cutting device is larger than the cutting width of the first cutting portion. In addition, while allowing the minimum cutting width of the slope cutting device to be equal to the cutting width of the first cutting unit, a cut grass discharge path can be formed between the traveling body and the second cutting unit, for example,
In a state in which the second mowing portion is positioned behind the first mowing portion so that each rotating blade does not protrude laterally outward from the lateral outer end of the first rotating blade, the traveling body side is greatly increased from the ground. It is conceivable to swing vertically about the front and rear axes relative to the first reaping unit so as to be in a separated posture, but in this case, the configuration becomes complicated and the operation becomes difficult. Become.

[0014] Accordingly, a configuration is provided in which a cut grass discharging path can be formed between the traveling machine and the second cutting unit while the minimum cutting width of the slope cutting device is set to the cutting width of the first cutting unit. Simplification and operability can be improved.

[0015]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an overall side view of a walk-type mower, and FIG. 2 shows an overall plan view of a walk-type mower for two-side mowing. A road cutting device 2 for cutting grass grown on a running road surface is connected to a front portion of the traveling vehicle body 1 and a slope on the left end of the road cutting device 2 is connected to one side end of the running road surface. It is configured for two-sided cutting by connecting a slope cutting device 3 that cuts the growing grass.

As shown in FIG. 1 and FIG.
Are the body frame 4 and the body frame 4 which are substantially L-shaped in side view.
, A transmission case 6 erected behind the body frame 4, and an output shaft 5 of the engine 5.
a, a belt-type transmission mechanism 7 laid over an input shaft 6a provided on the upper side of the transmission case 6, a rear wheel 8 provided on the lower left side of the transmission case 6, and
It is composed of a steering handle 9 extending rearward from the body frame 4. In addition, the front wheel 10 is provided in front of the road surface reaper 2 so that the load of the road surface reaper 2 can be run in a stable posture with the load kept on the ground. In addition, an auxiliary wheel 11 is provided in front of the slope reaper 3 so that the load of the slope reaper 3 can be left in the ground and run in a stable posture. The control handle 9 is connected to the rear upper end of the body frame 4 so as to be able to swing up and down around a connection fulcrum P1 in the left-right direction, and the height position of the extending end is adjusted by the up-down swing operation according to the height of the worker. The height can be changed to improve the workability. The steering handle 9 is configured to be fixed to the body frame 4 by tightening the bolt 12 with a knob, so that the height adjustment operation can be easily performed without using a tool.

As shown in FIGS.
Is a housing 13 extending in a horizontal posture from the front of the body frame 4 to the front, and a single rotating blade 14 rotatably mounted in the housing 13 around a vertically oriented drive shaft center P2. It is constituted by such as. The housing 13 includes a sheet metal top plate 13A fixed to a front portion of the body frame 4 and a rubber plate 13B connected to the top plate 13A so as to form a right wall portion and a rear wall portion. I have. The slope reaper 3 is provided with a housing 15 connected to the left end of the road reaper 2 so as to be able to swing up and down around a front-rear axis P3, and is rotatably mounted in the housing 15 about a drive axis P4. A first reaping portion 3A composed of a single piece of the first rotating blade 16 and a housing 17 that is swingably movable back and forth around a drive shaft center P4 of the first reaping portion 3A. It comprises a second reaping section 3B and the like comprising two rotating blades 18, 19 rotatably mounted around the drive shaft cores P5, P6 juxtaposed. The housing 15 of the first mowing part 3A is constituted by a top plate 15A made of sheet metal. Housing 17 of second reaping section 3B
Is connected to the top plate 17A so as to form a left wall portion and a rear wall portion in a state where the top plate 17A made of sheet metal and the second reaping portion 3B are located on the left side of the first reaping portion 3A. Rubber plate 1
7B. That is, the slope reaper 3 is connected to the left end of the road reaper 2 so as to be able to swing up and down around the longitudinal axis P3. 3 can be changed to a posture along the work surface on which the mowing operation is performed.
Also, the slope cutting device 3 is configured such that the second cutting portion 3B can swing back and forth around the drive shaft center P4 with respect to the first cutting portion 3A, and the front and rear of the second cutting portion 3B. By the swinging operation, the cutting width can be changed to a length corresponding to the length of the work surface on which the slope cutting device 3 performs the cutting operation.

The range of swinging of the second reaping unit 3B in the front-rear direction is determined from the position immediately to the left of the first reaping unit 3A, which is aligned with the first reaping unit 3A in the left-right direction of the machine. The first reaping unit 3A is set in a range immediately after the first reaping unit 3A, which is aligned with the one reaping unit 3A along the front-rear direction of the machine, and the second reaping unit 3B is directly connected to the first reaping unit 3A. The cutting width of the slope reaper 3 can be maximized by being located on the left side, and the slope reaper 3 can be maximized by arranging the second reaper 3B immediately behind the first reaper 3A. The cutting width can be minimized. The maximum cutting width length of the slope cutting device 3 is a length obtained by adding the maximum cutting width length of the second cutting unit 3B to the cutting width length of the first cutting unit 3A. The minimum cutting width of the slope cutting device 3 is only the cutting width of the first cutting unit 3A.

As shown in FIGS.
The rotating blade 14 and the rotating blades 16, 18, 19 of the slope cutting device 3 are arranged close to each other so that adjacent ones are in a state where a part of the cutting area (rotation locus) of each other overlaps. Each is set to rotate at a rotation phase that can avoid contact between adjacent objects. When the cutting width of the slope cutting device 3 is changed as described above, the second cutting portion 3B is swung back and forth around the drive shaft center P4 of the first rotary blade 16 of the first cutting portion 3A. For this reason, the distance between the rotary blades 14, 16, 18, and 19 can be kept constant regardless of the change in the cutting width of the slope cutting device 3. That is, at the time of the cutting operation, regardless of the change of the cutting width of the slope cutting device 3, the first cutting portion 3A between the road surface cutting device 2 and the slope cutting device 3 and the first cutting portion 3A in the slope cutting device 3 are connected. Two reaping unit 3B
And the rotating blades 18 of the second reaping unit 3B,
The configuration is such that inconveniences such as the occurrence of uncut between 19 and the contact between adjacent ones of the rotating blades 14, 16, 18, and 19 can be avoided.

As shown in FIGS.
And the first cutting unit 3A of the slope cutting device 3 is provided with drive shafts 14a, 16 of the rotating blades 14, 16 mounted respectively.
a are linked by the first transmission mechanism 20. The first transmission mechanism 20 includes a drive shaft 1 of the road surface reaper 2.
4A, a bevel gear type first gear transmission portion 20A, which is communicatively connected to the first mowing portion 3A, and a bevel gear type second gear transmission portion 20B, which is communicatively connected to the drive shaft 16a of the first reaper 3A. A road surface around the front-rear shaft core P3 is configured by a shaft transmission portion 20C and a universal joint 20D that connects the respective gear transmission portions 20A and 20B to the shaft transmission portion 20C so as to be able to transmit the same. The up and down swing of the slope reaping device 3 with respect to the reaping device 2 is allowed. The drive shafts 18a and 19a of the rotating blades 18 and 19 mounted on the second reaping unit 3B of the slope reaper 3 are linked to the end of the first power transmission mechanism 20 on the side of the slope reaper 3. The connected second transmission mechanism 21 is connected so as to be able to transmit. The second transmission mechanism 21 is a bevel gear type first gear transmission section 21A that is communicatively connected to the second gear transmission section 20B of the first transmission mechanism 20, and a rotating blade 18 on the side adjacent to the first reaping section 3A. Drive shaft 18a
Bevel gear type second gear transmission portion 21B, which is communicatively connected to the first bevel gear type, and a bevel gear type third gear transmission portion 21C, which is communicatively connected to the drive shaft 19a of the rotary blade 19 on the side away from the first mowing portion 3A. , And a shaft transmission portion 21D that connects the respective gear transmission portions 21A, 21B, and 21C so as to be able to transmit the same.
It is configured to be able to swing integrally back and forth around. The first gear transmission 20A of the first transmission mechanism 20 is provided with an input shaft 20a, and a belt tension type reaping clutch 22 is bridged between the input shaft 20a and the output shaft 5a of the engine 5. .

That is, in the road surface reaping device 2, the rotary blades 14 are driven by the power transmitted from the engine 5 through the reaping clutch 22 and the first transmission mechanism 20. Further, the slope reaping device 3 changes the posture by swinging up and down around the longitudinal axis P3, and
Regardless of the change in the cutting width due to the forward and backward swinging of the second cutting unit 3B around the drive shaft center P4, the engine 5 transmitted via the cutting clutch 22, the first transmission mechanism 20, and the second transmission mechanism 21. The rotating blades 16, 18, and 19 are driven by the power.

As shown in FIGS. 1 to 5, 17 and 18, the slope reaper 3 is provided with a first operating lever erected on a left handle bar 9 A of the steering handle 9 so as to be able to swing back and forth. 23, an operation arm 24 supported to be able to swing left and right by a first gear transmission portion 20A of the first transmission mechanism 20, a release wire 25 extending from the first operation lever 23 to the operation arm 24, and a One reaper 3A
Of the first transmission mechanism 20 to which the housing 15 is fixedly connected via an operation rod 26 extending over the second gear transmission section 20B. The first operation lever 23 can be held at a desired operation position by engaging with a guide plate 27 mounted on the left handlebar 9A. That is, by the swinging operation of the first operating lever 23 to the rear side against the own weight of the slope reaper 3, the slope reaper 3 can be lifted and oscillated around the longitudinal axis P3. By the swinging operation of the first operation lever 23 to the front side, the slope cutting device 3 can be swung down around the longitudinal axis P3 by its own weight. In addition, by engaging the first operation lever 23 with the guide plate 27 at a desired operation position, the slope reaper 3 can be moved in the longitudinal axis P
It can be held in a desired posture around 3.
In addition, an assist gas cylinder 28 for reducing the operating force when the slope operating device 3 is raised and rocked by the first operating lever 23 is installed from the housing 13 of the road surface harvesting device 2 to the operating arm 24. The operation of the gas cylinder 28 allows the first operation lever 23 to perform the upward swinging operation of the slope cutting device 3 with a light operation.

As shown in FIGS. 1 to 5 and FIG. 19, the second cutting unit 3B of the slope cutting device 3 swings back and forth integrally with the second cutting unit 3B around the drive shaft center P4 of the first cutting unit 3A. The moving second transmission mechanism 21 is linked via a push-pull wire 30 to a second operation lever 29 erected on the right handle bar 9B of the operation handle 9 so as to be able to swing back and forth. In other words, the second cutting lever 3B is moved back and forth by the second operating lever 29 to move the second cutting unit 3B to the drive shaft center P4 of the first cutting unit 3A.
It can swing back and forth around, so that the cutting width of the slope cutting device 3 can be changed. The second operation lever 29 is swingably supported by a shaft transmission portion 21D of the second transmission mechanism 21 with respect to a fan-shaped engaged plate 31 fixed to the second gear transmission portion 20B of the first transmission mechanism 20. An operation rod 33 for releasing the engagement of the engagement arm 32 is fitted inside. The operating rod 33 and the engaging arm 32 are pivotally connected to the lower end of the operating rod 33 and are supported by the second operating lever 29 so as to be able to swing back and forth. Release wire 3
5 are linked. The operating rod 33 is biased by a tension spring 36 extending from the second operating lever 29 to the crank arm 34 so as to protrude from above the second operating lever 29. The engagement arm 32 is urged by a helical spring 37 to engage with the engaged plate 31. That is, by pushing the operating rod 33 against the tension spring 36 and the helical spring 37, the engagement of the engagement arm 32 with the engaged plate 31 can be released. The operation of swinging the second reaping unit 3B forward and backward by the operation lever 29 can be performed. Further, by releasing the pushing operation of the operating rod 33, the engaging arm 32 can be engaged with the engaged plate 31 by the urging of the helical spring 37, so that the second reaping portion 3B is driven by the drive shaft center. It can be held in a desired posture around P4.

As shown in FIGS. 1 and 17, the cutting clutch 22 is linked via a release wire 39 to a cutting clutch lever 38, which is mounted on the left handlebar 9A of the steering handle 9 so as to be able to swing up and down. And
It is of a deadman type that can be switched to the transmission state by an upward swinging operation of the reaping clutch lever 38 by gripping the left handle bar 9A and the reaping clutch lever 38 together.

As shown in FIGS. 2 to 4, 6 and 7,
At the rear end of the first cutting unit 3A in the slope cutting device 3,
A rear wall body 40 for preventing the cut grass and the like cut by the first cutting unit 3A from scattering to the rear is provided. Rear wall 4
Numeral 0 designates a rubber plate 40A forming a rear wall portion and a support member 40B supporting the rubber plate 40A, and a housing 13 serving as a fulcrum on the side of the road surface reaping device 2 Is connected so as to be able to swing back and forth around a vertical axis P7 set at the left rear end portion of the and to be able to swing up and down around a horizontal axis P8.
Via a link 41. The horizontal axis core P8 is
When the second reaping unit 3B of the slope reaping device 3 is located at the position immediately to the left of the first reaping unit 3A, the second reaping unit 3B is located on an extension of the front-rear axis P3. That is, the rear wall body 40
Swings back and forth around the longitudinal axis P7 in conjunction with the longitudinal swing operation of the second reaping unit 3B around the drive shaft center P4,
It is configured to swing up and down around the horizontal axis P8 in conjunction with the up and down swinging operation of the slope cutting device 3 around the front and rear axis P3. Part 3
Regardless of the change in the cutting width of the slope cutting device 3 that swings back and forth around the drive shaft center P4 of A, and the change in the posture of the slope cutting device 3 around the front and rear shaft center P3, the first cutting portion 3A. While being able to prevent the scattering of cut grass and the like from the rear, it is provided at the rear end of the first cutting unit 3A,
This prevents an obstacle when changing the cutting width of the slope cutting device 3 that swings the second cutting unit 3B back and forth around the drive shaft center P4 of the first cutting unit 3A.

As shown in FIGS. 3 to 5, when the cutting width of the slope cutting device 3 for swinging the second cutting portion 3B back and forth around the drive shaft center P4 of the first cutting portion 3A is changed. Since the housing 15 of the first reaping unit 3A and the housing 17 of the second reaping unit 3B may be separated from each other in accordance with the operation to form a gap, the cover 42 for filling the gap is provided with the second reaping. First cutting section 3A in housing 17 of section 3B
It extends from the end on the side toward the first reaping unit 3A.
In other words, the cover 42 is provided at the end of the housing 17 of the second reaping unit 3B on the side of the first reaping unit 3A, so that during the reaping operation, the cutting width of the sloping reaper 3 is changed so that the slope reaping device 3 is removed. The cut grass can be prevented from scattering from a gap formed between the housings 15 and 17. In addition, the housing 1 of the first reaping unit 3A
5, a pressing plate 43 for preventing the cover 42 from rising from the upper surface of the first cutting unit 3A is provided on an upper surface portion on the second cutting unit 3B side. The cut grass can be prevented from scattering from between the upper surface of the cover and the cover 42.

As shown in FIGS. 7 and 20, the slope cutting device 3 is configured such that the free end of the second cutting portion 3B is in the minimum cutting width state in which the free end of the second cutting portion 3B is located at the rearmost position. Is rear wheel 8
Is located near the rear end, and the front side of the body can be largely levitated with the support shaft 8a of the rear wheel 8 as a fulcrum. That is, for example, when it becomes necessary to move over the stepped portion while traveling with the left and right widths of the aircraft minimized by positioning the free end of the second reaping unit 3B at the rearmost position, In the case where the free end is set to be located rearward from the rear end of the rear wheel 8, even if the front side of the body is lifted with the axle 8a of the rear wheel 8 as a fulcrum, the second reaping portion 3B Since the front end side of the fuselage cannot be levitated greatly due to the free end coming into contact with the road surface, there is a disadvantage that it is not possible to easily climb over the stepped portion. Since the free end of the mowing part 3B is set near the rear end of the rear wheel 8, as shown in FIG. 20, the front side of the body is set with the support shaft 8a of the rear wheel 8 as a fulcrum. Can levitate greatly and easily climb over steps So that the can be.

As shown in FIGS. 6 and 7, the reaping device 2 for a road surface is configured such that the rotating blade 14 rotates counterclockwise in plan view. The slope cutting device 3 is configured such that the rotating blade 18 of the second cutting unit 3B on the side of the first cutting unit 3A rotates counterclockwise in plan view, and the other rotary blades 16 and 19 rotate clockwise in plan view. Have been. With this configuration, the mowing grass cut by the rotary blade 14 of the road surface mowing device 2 and the first rotary blade 16 of the first mowing portion 3A of the slope mowing device 3 is removed from each of the rotary blades 14, 1.
6, the guide between the rotary blades 14, 16 can be provided, and the rotary blades 14, 16 can be guided.
The rotating blades 18 of the second reaping unit 3B in the sloping reaper 3 can be smoothly discharged rearward from between.
The cut grass that has been cut at 19 is supplied to each rotating blade 18,1.
9 allows it to be guided between the rotating blades 18 and 19, and also allows the rotating blades 18 and 1 to be guided.
It is designed to discharge smoothly from 9 spaces to the rear. That is, when the rotating blade 14 of the road surface reaping device 2 is configured to rotate clockwise in a plan view, the cut grass cut by the rotating blade 14 is removed by the housing 13 and the rotating blade 14 of the road surface reaping device 2. And the rotation blade 19 on the free end side of the second cutting portion 3B of the slope cutting device 3 is configured to rotate counterclockwise in plan view. The disadvantage is that the grass cut off by the rotating blade 19 accumulates between the housing 17 of the second cutting unit 3B and the rotating blade 19 and hinders cutting and running. Blade 1
4, 16, 18 and 19 are configured to rotate in the same direction.
The mowing grass cut at 8, 19 is excellent in terms of mowing performance and running performance, which can avoid the inconvenience that the mowing grass is deposited without being discharged from between them and hinders mowing or running. ing.

As shown in FIG. 2 to FIG.
In the state where each of the rotating blades 18 and 19 of the second cutting unit 3B is formed to have a smaller diameter than the first rotating blade 16 of the first cutting unit 3A and the cutting width is set to the maximum, the second cutting unit 3B The rear edge 17a of the housing 17 is
The rotating blades 18 and 19 of the second cutting unit 3B are aligned rearward in a straight line from immediately after the first cutting unit 3A. In the minimum cutting width state, the second cutting unit 3B and the traveling body 1
And a cut grass discharge path R is formed between them. With this configuration, in the state where the cutting width of the slope cutting device 3 is set to the minimum cutting width as described above, the cutting is performed by the first cutting unit 3A of the road cutting device 2 and the slope cutting device 3. The cut grass is cut by the road cutting device 2 and the first cutting unit 3A.
Between the traveling body 1 and the second reaping unit 3B
When they are discharged in a state of being collected in a straight line between them, it is possible to prevent problems such as scattering caused by the action of the rotating blades 18 and 19 of the second cutting unit 3B.

As shown in FIGS. 2, 6 and 7, the rear wheel 8 is mounted on a drive shaft 8a extending leftward and outward from a lower portion of the transmission case 6, which is a support shaft 8a. It is constituted by a pair of rubber tires 8A, and is driven by the power from the engine 5 transmitted via the transmission case 6. As shown in FIGS. 15 and 16, on the upper side of the transmission case 6,
A traveling speed reduction mechanism A communicatively connected to the input shaft 6a is provided. The speed reduction mechanism A includes a transmission unit Aa capable of switching the power from the engine 5 between high and low to reduce the speed.
And a clutch Ab for intermittently transmitting power from the engine 5 to the rear wheel 8. Specifically, the speed reduction mechanism A
Is a first high-speed gear 44 and a first low-speed gear 45 externally fitted to the input shaft 6a so as to be relatively rotatable, a second high-speed gear 46 meshing with the first high-speed gear 44, and a second high-speed gear 46 meshing with the first low-speed gear 45. A low-speed gear 47, a transmission shaft 48 provided below the input shaft 6a to support the second high-speed gear 46 and the second low-speed gear 47 so as to be rotatable integrally, and a first relay gear 48a formed integrally with the transmission shaft 48. A second relay gear 49 externally fitted to the input shaft 6a so as to be rotatable relative to the input shaft 6a, externally fitted to the input shaft 6a so as to be rotatable and slidable, and to the second relay gear 49 by a sliding operation. Integrally formed engaging claw 49
a shift gear 50 having a meshing claw 50a meshable with
And a final gear 51 which is rotatably fitted to the transmission shaft 48 in a state of meshing with the shift gear 50. Of these, the first high-speed gear 44, the first low-speed gear 45, and the second high-speed gear The transmission 46 includes the gear 46 and the second low-speed gear 47. Further, the clutch portion A is formed by the second relay gear 49 and the shift gear 50.
b. An output sprocket 52 is attached to the final gear 51 of the speed reduction mechanism A so as to be rotatable integrally.
From the output sprocket 52, an input sprocket 53 which is integrally rotatably mounted on a drive shaft 8a for driving the rear wheel 8.
The chain 54 is wound over the entirety. That is,
With the above-described configuration, the power from the engine 5 is transmitted to the rear wheel 8 such that the power can be intermittently switched and the height can be switched between two levels.

As shown in FIG. 1, FIG. 2 and FIG. 15, the switching operation of the transmission portion Aa is performed by swinging a transmission lever 55 extending rearward from the upper left side of the transmission case 6 to the rear. Thereby, the shift shaft 56 with the key 56a slidably fitted on the input shaft 6a is slid, and the key 56a is selectively engaged with the first high-speed gear 44 or the first low-speed gear 45. It can be done by doing. As shown in FIGS. 1 and 16, the switching operation of the clutch Ab is performed by connecting the shift gear 50 via the shift fork 57 and the release wire 58 to the right handlebar 9B of the steering handle 9.
Running clutch lever 5 equipped to be able to swing up and down
A spring (not shown) for operating the shift fork 57 in the transmission cutting direction by gripping the shift fork 57 with the right handle rod 9B.
The deadman system is configured to switch to the transmission state by swinging upward against the urging of the above.

As shown in FIGS. 1 to 4, 15 and 16, the front wheel 10 is provided with a power take-out shaft disposed between the speed reduction mechanism A in the transmission case 6 and the drive shaft 8 a for driving the rear wheel 8. 6b, a first chain-type transmission mechanism 61 extending from the power take-out shaft 6b to the relay shaft 60 disposed at the front of the housing 13 in the road mowing device 2, and a second chain-type transmission mechanism 61 extending from the relay shaft 60 to the support shaft 10a of the front wheel 10. Two chain transmission mechanism 62
And so that they can be transmitted. Power take-out shaft 6b
The sprocket 6c meshes with the chain 54 wound around the output sprocket 52 mounted on the transmission shaft 48 of the speed reduction mechanism A from the input sprocket 53 mounted on the drive shaft 8a in the winding path. They are connected so as to be integrally rotatable. That is, the front wheels 10 are driven by the power from the engine 5 transmitted via the belt-type transmission mechanism 7, the transmission case 6, the first chain-type transmission mechanism 61, and the second chain-type transmission mechanism 62. Has become. In addition, since the power take-out shaft 6b for driving the front wheels 10 is disposed higher than the drive shaft 8a for driving the rear wheels 8, the transmission system for driving the front wheels 10 may be inclined due to the inclination of the body or unevenness of the ground. It can be prevented from being damaged by contact with the ground.

As shown in FIGS. 1 to 4 and FIGS. 12 to 14, the second chain type transmission mechanism 62 includes a
The front wheel 10 is mounted on a pair of left and right support brackets 63 erected on the housing 13 so as to be swingable up and down and extends forward, and the front wheel 10 is attached to the extended end thereof. I have. That is, the second chain type transmission mechanism 62
The vertical position of the front wheel 10 with respect to the road surface reaping device 2 can be changed by the vertical swing operation, and the cutting height of the road surface reaping device 2 can be changed. The second chain-type transmission mechanism 62 expands a plurality of (five in this embodiment, as shown in FIG. 14) the left support bracket 63 by tightening a bolt 64 with a knob having an enlarged diameter portion 64a. A long hole 6 formed to have a diameter portion 65a
5 can be fixed to a desired swinging posture without using a tool by engaging with any of the enlarged diameter portions 65a, whereby the cutting height changing operation of the road surface cutting device 2 can be performed. It can be done easily.

As shown in FIGS. 2 to 4, 10 and 11, the auxiliary wheel 11 includes a support arm 66 extending forward from the second gear transmission portion 20B of the first transmission mechanism 20, and It is possible to change the height position with respect to the slope cutting device 3 in front of the first cutting portion 3A in the slope cutting device 3 via a support rod 67 extending from the support arm 66 so as to be vertically swingable. It is arranged to become. That is, since the auxiliary wheel 11 is disposed in front of the first cutting unit 3A, the auxiliary wheel 11 can be cut by the slope cutting device 3 even when the slope cutting device 3 is set to the minimum cutting width. Since it can be located within the width, even if it is a narrow work place that needs to be steered with the slope cutting device 3 set to the minimum cutting width, it can enter the work place, Even in a work place, it is possible to steer in a stable posture in which the load of the slope reaper 3 is deposited on the ground, thereby improving the stability during running and the workability. Also, by changing the height position of the auxiliary wheel 11 with respect to the slope cutting device 3, the cutting height of the slope cutting device 3 can be changed. At the rear end of the support rod 67, a plurality (in this embodiment, FIG.
(See FIG. 5), a connection plate 68 having five connection holes 68a formed therein is mounted.
By inserting the connecting pin 66a mounted on the support arm 66 into any one of the supporting arms 8a, a desired swinging posture can be fixed without using a tool. With this configuration, the cutting height changing operation of the slope cutting device 3 can be easily performed.

As shown in FIGS. 3, 4 and 8 to 11, the support rod 67 is supported by the connecting plate 68 so as to be rotatable around its axis P9, and the operation arm fixed to the rear portion thereof. 67a is the housing 13 of the road surface reaping device 2.
The swing arm 70 is pivotally connected to a free end of a swing arm 70 that is swingably connected to a fixed plate 69 erected on the front side around the front-rear axis P10. From this configuration, the auxiliary wheel 1 attached to the support rod 67
Numeral 1 rotates around the axis P9 of the support rod 67 in conjunction with the vertical swing operation around the longitudinal axis P3 of the slope reaper 3. The attitude with respect to the reaper 3 is changed to be maintained in a substantially vertical attitude. In other words, the auxiliary wheel 11 is maintained in a substantially vertical position regardless of the inclination angle of the slope reaper 3, thereby making it easier to receive the load of the slope reaper 3 and thereby the load applied to the auxiliary wheel 11. As a result, the biting force on the inclined surface obtained is increased, so that side slip on the inclined surface is less likely to occur. As shown in FIGS. 8 and 9, the connection position of the swing arm 70 with respect to the fixing plate 69 of the road surface reaper 2 can be changed, and the posture of the auxiliary wheel 11 is changed by changing the connection position. Can be changed.

As shown in FIG. 21, the housing 17 of the second reaping portion 3B of the slope cutting device 3 is mounted on the front edge portion 17b of the slope cutting device 3 when the cutting width of the slope cutting device 3 is set to the maximum. May be formed so as to be inclined toward the rear end toward the extension end side. When formed in this manner, a component force for moving or lifting the slope cutting device 3 toward the machine body can be generated from the rearward pressing force due to the resistance of the grass received by the leading edge portion 17b during the cutting operation. Since the backward pressing force can be reduced, the operability at the time of the mowing operation can be improved.

[Other Embodiments] Other embodiments of the present invention will be listed below. The road mowing device 2 includes a plurality of rotating blades 1.
4 may be provided, or a configuration may be employed in which mowing is performed by reciprocal sliding of a pair of upper and lower blades in a reciprocating manner. The slope cutting device 3 may be connected to the right end of the road cutting device 2. One rotating blade 18 may be provided in the second reaping portion 3B of the slope reaping device 3, or three or more rotating blades 18 and 19 may be provided in parallel. The rotating blades 18 and 19 of the second cutting unit 3B in the slope cutting device 3 may be formed to have the same diameter as the first rotating blade 16 of the first cutting unit 3A. In this case, the minimum cutting width state of the slope cutting device 3 is the first cutting unit 3.
By setting the swing range of the second reaping unit 3B to be larger than the reaping width of A, the distance between the traveling body 1 and the second reaping unit 3B in the minimum reaping width state of the sloping reaper 3 is set. May be configured to form a cut grass discharge route R,
In the minimum cutting width state of the slope cutting device 3 in which the second cutting unit 3B is located behind the first cutting unit 3A, the second cutting unit 3B is positioned around the front-rear axis of the second cutting unit 3B with respect to the first cutting unit 3A. The traveling body 1 and the second body 3 are configured so that the posture can be changed or the vertical displacement about the left and right axes can be changed. The cut grass discharge route R may be formed between the two cutting units 3B.

[Brief description of the drawings]

FIG. 1 is an overall side view of a walking-type mower.

FIG. 2 is an overall plan view of a walking type mower.

FIG. 3 is a plan view of a cutting unit in a state where a slope cutting device is set to a maximum cutting width, showing a support structure of a front wheel and an auxiliary wheel and a configuration of each cutting device.

FIG. 4 is a plan view of a cutting unit in a state where a slope cutting device is set to a minimum cutting width, showing a support structure of a front wheel and an auxiliary wheel and a configuration of each cutting device.

FIG. 5 is a longitudinal sectional front view showing the configuration of each reaper.

FIG. 6 is a schematic plan view of the walking type mower showing the arrangement of the front wheels and the auxiliary wheels and the state where the cutting device for the slope has been set to the maximum cutting width.

FIG. 7 is a schematic plan view of a walking-type mower showing the arrangement of front wheels and auxiliary wheels, and a state in which a slope cutting device is set to a minimum cutting width.

FIG. 8 is a front view of the reaper showing a state in which the support structure of the auxiliary wheels and the sloping reaper are set in a horizontal posture.

FIG. 9 is a front view of the reaper showing a state in which the support structure of the auxiliary wheels and the sloping reaper are set in an inclined posture.

FIG. 10 is a longitudinal sectional side view of a slope cutting device showing a support structure of an auxiliary wheel.

FIG. 11 is a longitudinal sectional plan view of a main part showing a support structure of an auxiliary wheel.

FIG. 12 is a side view of a main part showing a support structure for a front wheel.

FIG. 13 is a cross-sectional plan view of a main part showing a height adjusting structure of a front wheel.

FIG. 14 is a side view of a main part showing a height adjusting structure of a front wheel.

FIG. 15 is a longitudinal sectional front view showing a transmission structure in a transmission case.

FIG. 16 is a longitudinal sectional side view showing a transmission structure in a transmission case.

FIG. 17 is a side view of a main part showing a configuration of an operation lever unit for vertically swinging the slope reaper.

FIG. 18 is a plan view of a main part showing a configuration of an operation lever unit that vertically swings and operates the slope cutting device.

FIG. 19 is a side view of a main part showing a configuration of an operation lever unit for changing a cutting width of the slope cutting device.

FIG. 20 is a schematic side view of the walk-behind mower, showing a state where the mower has climbed on a step;

FIG. 21 is a schematic plan view of a walking-type mower showing a modification in which the front edge of the housing in the second mowing portion is formed so as to be inclined rearward toward the extension end side.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Running body 2 Road surface cutting device 3 Slope cutting device 3A First cutting unit 3B Second cutting unit 16 First rotating blade 18 Rotating blade 19 Rotating blade P4 Drive shaft core R Cutting grass discharge path

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Shinya Inada 4-5-1-5 Mokudori, Mihara-cho, Minamikawachi-gun, Osaka Inside Kubota Seiki Co., Ltd. (56) References JP-A-8-298837 (JP, A) ( 58) Field surveyed (Int.Cl. ⁷ , DB name) A01D 34/66 A01D 34/68 A01D 34/86 A01D 34/73

Claims (2)

(57) [Claims] 1. A road reaping device for cutting grass grown on a running road surface is connected to a front portion of a traveling body, and a slope connected to one side end of the road surface reaping device and one side end of the running road surface. A plurality of rotating blades arranged in parallel with respect to a first cutting unit having a first rotating blade disposed adjacent to the road surface cutting device by coupling a slope cutting device for cutting grass grown on a surface. The second mowing portion provided with the first mowing portion is connected to the first rotating blade of the first rotating blade so as to be swingable back and forth around the drive shaft to form the slope cutting device, wherein each of the second mowing portion In the minimum cutting width state of the slope cutting device in which the rotating blades are aligned rearward in a straight line from immediately after the first cutting portion, the cutting grass is disposed between the traveling body and the second cutting portion. A walk-type mower for two-sided mowing configured to form a discharge path 2. The walking mower for two-side mowing according to claim 1, wherein each rotary blade of the second mowing portion is formed to have a smaller diameter than the first rotary blade.