JP2001218513A - Mower and mowing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mower designed to be kept from traveling due to, for example, the mobile element's being caught by an obstacle even in case the mobile element hits on the obstacle in cutting grass grown in the vicinity of the obstacle. SOLUTION: This mower has a mobile element 3 with a subcutter 33 on the flank of a traveling vehicle body 1 with the main cutter 103; wherein the mobile element 3, in turn, has a rotator 5 ensuring the subcutter 33 not to directly hit on any obstacle, lies at a specified position in a normal state and is provided so as to be horizontally movable when the rotator 5 hits on any obstacle.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a self-propelled mowing machine and a mowing method provided with a movable body having a sub-cutter beside a traveling vehicle body having a main cutter. More specifically, when cutting grass growing near obstacles,
The present invention relates to a mowing machine that is not hindered from running when a moving body hits an obstacle. In addition, the present invention relates to a mower in which an obstacle is hardly damaged, and furthermore, an obstacle which is hit is hardly damaged.

[0002]

2. Description of the Related Art Conventionally, as a mowing machine for cutting grass growing near obstacles such as around tree trunks,
For example, one disclosed in JP-A-8-37871 is known. In this mowing machine, a moving body having a mowing blade at a lower portion of the body is provided so as to be movable sideways by a slide mechanism. The mowing machine moves the moving body to the side of the body by a slide mechanism, fixes the moving body at a predetermined projecting position by a fixing mechanism, and grows near an obstacle by a mowing blade protruding to one side of the body. Used to reap grass.

[0003]

However, the above-mentioned conventional mower has the following problems. That is, the moving body provided on the mower is moved to the side of the machine. Since the mobile unit is fixed and used, the mobile unit may accidentally hit an obstacle such as a tree during mowing, and the mobile unit may be caught by the obstacle and hinder the running of the mower. was there. Further, the moving body may be broken by an impact hitting an obstacle. Further, the moving body may damage the obstacle hit by the moving body.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problem, so that even when the moving body hits an obstacle, the moving body is not hindered by the obstacle and the running of the mower is not hindered. To provide a mowing machine and a mowing method. It is another object of the present invention to provide a mowing machine and a mowing method that make it difficult for a mowing machine that has hit an obstacle to be damaged, and that also makes it difficult for the mowing machine that has hit an obstacle to be damaged.

[0005]

Means of the present invention taken to achieve the above object are as follows. According to a first aspect of the present invention, there is provided a self-propelled mowing machine including a movable body having a sub-cutter on a side of a traveling vehicle body having a main cutter, wherein the movable body has a direct obstacle. The moving body is provided at a predetermined position in a normal state, and is movable in a horizontal direction or a substantially horizontal direction when the guard portion hits an obstacle. And the mower is
A mowing machine comprising a return means for returning the moving body to an original position when the moving body moves from the predetermined position.

According to a second aspect of the present invention, there is provided a self-propelled mower equipped with a movable body having a sub-cutter on a side of a traveling vehicle body having a main cutter, wherein the movable body is provided with the sub-cutter. Is provided with a rolling means for preventing the object from directly hitting an obstacle, and the moving body is in a predetermined position in a normal state, and when the rolling means hits an obstacle, the rolling means moves to an obstacle. Is provided so as to be movable in the horizontal direction or substantially in the horizontal direction while rolling along or substantially along the surface of the mowing machine. The mowing machine further comprises a return means for returning the moving body to the original position when the mowing is performed.

According to a third aspect of the present invention, there is provided a self-propelled mower equipped with a movable body having a sub cutter on a side of a traveling vehicle body having a main cutter, wherein the movable body is provided with the sub cutter. Is provided with a rolling means for preventing the object from directly hitting an obstacle, and the moving body is in a predetermined position in a normal state, and when the rolling means hits an obstacle, the rolling means moves to an obstacle. Is provided so as to be movable in a horizontal direction or a substantially horizontal direction by a link device while rolling along or substantially along the surface of the mowing machine. A mowing machine characterized by comprising a return means for returning the moving body to an original position when moved from a position.

According to a fourth aspect of the present invention, the rolling means includes a rotating body rotatable in a horizontal direction or a substantially horizontal direction, and the rotating body has an outer edge portion outside the rotation range of the sub-cutter. A mower according to the second or third aspect of the present invention, which is provided so as to be positioned.

According to a fifth aspect of the present invention, the rolling means includes a plurality of rotating bodies rotatable in a horizontal direction or a substantially horizontal direction, and the rotating bodies include an endless peripheral body of the sub-cutter. A mower according to the second or third aspect of the present invention, wherein the mower is wound so as to be positioned outside a rotation range.

According to a sixth aspect of the present invention, the rolling means includes a plurality of rotating bodies which are rotatable in a horizontal direction or a substantially horizontal direction, and the whole outer edge of the rotating body is a sub-cutter. A mowing machine according to the second or third aspect of the present invention, wherein the mowing machine is provided so as to be positioned outside a rotation range of the mowing machine.

According to a seventh aspect of the present invention, the sub-cutter can be swung up and down so as to be able to mow a surface intersecting with the mowing surface of the main cutter. A mower according to a second, third, fourth, fifth or sixth invention.

According to an eighth aspect of the present invention, there is provided a mowing method using a self-propelled mower equipped with a moving body having a sub cutter on a side of a traveling vehicle body having a main cutter, wherein the sub cutter is directly obstructed. A mowing method characterized by moving the moving body in a horizontal direction or substantially in a horizontal direction from a predetermined position when a guard portion for preventing the object from hitting an obstacle.

A single sub cutter or a plurality of sub cutters can be provided beside the main cutter.

The "guard portion" in the present invention is a concept including a cover for covering the sub cutter and rolling means.

As the main cutter and the sub-cutter, a cutter whose blade rotates in a horizontal direction or a rotary cutter (vertical rotation) can be used.

(Operation) According to the mower according to the present invention,
When mowing the grass around the obstacle, the guard of the moving body may hit the obstacle, but the moving body moves horizontally or substantially horizontally from the predetermined position even if it hits the obstacle Therefore, the mowing work can be performed smoothly without the traveling body being hindered by the obstacle and hindering the traveling. The sub cutter moves with the movement of the moving body.

Since the moving means is provided with a return means for returning the moving body to the original position when the moving body moves from the predetermined position, the moving body is simultaneously moved to the predetermined position when the moving body moves from the predetermined position. There is also a resilience to return to. For this reason, the moving body moves along the obstacle, thereby mowing a portion very close to the obstacle. Further, when the moving body is separated from the obstacle, the moving body returns to the original predetermined position by the above-described returning means.

In the case where the rolling means is provided with the rolling means, the rolling means rolls along or substantially along the surface of the obstacle when the rolling means hits the obstacle. In addition, it is possible to make it difficult for friction to occur at a contact portion between the rolling means and the obstacle, and to easily move the moving body from a predetermined position. With this, even when the rolling means hits an obstacle,
The mower can run smoothly and is less susceptible to damage.

The rolling means includes a rotating body rotatable in a horizontal direction or a substantially horizontal direction, and the rotating body is provided such that an outer edge portion thereof is located outside a rotation range of the sub cutter. Since the obstacle hits the rolling means, the sub cutter does not directly hit the obstacle.

The rolling means is provided with a plurality of rotating bodies rotatable in the horizontal direction or substantially in the horizontal direction. The rotating bodies have endless peripheral bodies positioned outside the rotation range of the sub-cutter. Since the rolling means can be arranged in a state in which the required spacing is provided between the wound parts, a wide range can be guarded by a small number of rolling means. Further, since there is a gap between the rolling means, it is possible to make it difficult for dirt or the like to be clogged between the rolling means, and it is possible to prevent troubles such as the rotation means not rotating.

The rolling means includes a plurality of rotating bodies which are rotatable in a horizontal direction or a substantially horizontal direction, and the rotating bodies are arranged such that the entire outer edge is located outside the rotation range of the sub-cutter. The shape of the rolling means can be freely formed according to the shape of the cover covering the sub-cutter.

The sub-cutter can be swung up and down so as to cut the surface intersecting with the cutting surface of the main cutter. Even if the mowing surface is higher than the mowing surface, the sub-cutter swings up and down to cope with the undulation of the terrain, so that mowing work on an uneven surface can be performed.

[0023]

Embodiments of the present invention will be described in more detail with reference to the drawings. FIG. 1 shows a first embodiment of a mower according to the present invention, and is a plan view explanatory view showing a moving state of a moving body in a horizontal direction by imaginary lines, and FIG. 2 shows the mower of FIG. FIG. 3 is a front view explanatory view showing the moving state of the moving body in the vertical direction by imaginary lines, and FIG. 3 is a side view explanatory view showing the mower of FIG.

Reference numeral A1 indicates a mower. Mower A
1 includes a traveling vehicle body 1, an oscillator 2 and a moving body 3 provided on one side of the traveling vehicle body 1. The traveling vehicle body 1 includes a steering wheel 15, a driving wheel 16, a steering wheel 17,
Since this is a general riding type self-propelled mower having the seat 18, the engine 19, and the like, a detailed description of the configuration is omitted.

At the center of the traveling vehicle body 1, there is provided a cutting section 10 for cutting grass. The reaper 10 includes a cover 100 that covers the main cutter 103. Reaper 10
Is provided with a vertical axis 101 at a substantially central portion thereof. Vertical axis 10
1, a pulley 102 and a main cutter 103 are attached. The main cutter 103 has a vertical axis 101
Rotate horizontally around.

One side of the cover 100 (left side in FIG. 1)
On the upper side, a hinge member 12 for attaching the swinging body 2 to be able to swing vertically is provided. The hinge member 12 is
Attachment members 12 provided substantially in parallel at a required interval
The three connecting members 122 are bridged between 0 and 121. The hinge member 12 is attached such that a rotation shaft (not shown) is inserted into one of the attachment members 120 so that the hinge member 12 can rotate vertically on the cover 100 about the rotation shaft. At this time, the other attachment member 12
1 is positioned outside the cover 100.

At the rear side of the mounting member 121, a tension coil spring 1 having one end attached to a required position of the traveling vehicle body 1 is provided.
The other end of 3 ... is attached. Extension coil spring 13
.. Are provided three at a required interval, and the hinge member 12 is pulled obliquely from above. When the hinge member 12 is in a substantially horizontal state, the tension coil springs 13... Are slightly extended. In the vicinity of the center of the attachment member 121, one end of a gas damper D as a return means is rotatably mounted on an axis.

The oscillating body 2 is attached to the attachment member 121 of the hinge member 12. The rocking body 2 includes a hinge member 12
Can swing up and down. The oscillating body 2 includes a cover 20, and a vertical axis 2 is provided substantially at the center of the cover 20.
1 is provided. Pulleys 22 and 23 are attached to the vertical shaft 21.
And the first sub-cutter 24 is attached. An endless belt V1 is wound between the pulley 22 and the above-described pulley 102. First sub cutter 24
Rotate in a horizontal direction about a vertical axis 21. Reference numerals P1 and P2 indicate tension pulleys for tensioning the belt V1 in a tensioned state.

One end of a link member R that supports the movable body 3 so as to be movable in the horizontal direction is rotatably provided near the traveling vehicle main body 1 at the upper rear part of the cover 20. On the side of the cover 20 opposite to the traveling vehicle body 1, there is provided a sled-like sliding member 25 that slides on the mowing surface.

A moving body 3 is provided on the rear side of the rocking body 2. The moving body 3 includes a cover 30.
A vertical axis 31 is provided at a substantially central portion of 0. Vertical axis 31
, A pulley 32 and a second sub-cutter 33 are attached. An endless belt V2 is wound between the pulley 32 and the above-described pulley 23. The second sub-cutter 33 rotates in the horizontal direction about the vertical axis 31.

The other end of the above-mentioned link member R is provided rotatably near the traveling vehicle main body 1 at the upper rear portion of the cover 30. Thereby, the moving body 3 can move about the one end of the link member R so as to approach or separate from the traveling vehicle body 1 in the horizontal direction.

Pulley 2 around which belt V2 is wound
A belt cover 4 is provided between 3 and 32. In the vicinity of the vertical axis 31 on the belt cover 4, the other end of the gas damper D is rotatably provided. Gas damper D
Are stationary in an extended state, and maintain a state in which the moving body 3 is separated from the main cutter 103 in a normal state (a state shown by a solid line in FIG. 1).

On the upper part of the cover 30, a rotating body 5 as rolling means is provided. The rotating body 5 includes a rotating shaft 50 vertically suspended from a position that is coaxial with the vertical shaft 31. The rotating body 50 is provided on the rotating shaft 50 so as to rotate in the horizontal direction. The rotating body 5 has a wheel 51, and is provided such that an outer edge portion is located outside a rotation range of the second sub-cutter 33. A tire 52, which is an elastic cushioning member, is provided on the outer edge. Further, between the cover 30 and the rotating body 5, a bar-shaped defense member 6 is provided to extend obliquely rearward in the horizontal direction so as to prevent an obstacle from hitting the rotating body 5 from behind. Reference numeral 60 indicates a stay for supporting the protection member 6.

(Operation) The operation of the embodiment of the present invention will be described with reference to FIGS. In the mower A1, the main cutter 103 and the first sub-cutter 24 cut the grass where the traveling vehicle body 1 has passed and the grass in the vicinity thereof, and the second sub-cutter 33 cuts the grass around the obstacle. Can be.

When cutting around an obstacle with the second sub-cutter 33, the moving body 3 must be brought close to the obstacle. As a result, the moving body 3 may hit an obstacle, but the moving body 3 is provided with a rotating body 5, and the outer edge of the rotating body 5 is positioned outside the rotation range of the second sub-cutter 33. Therefore, an obstacle having a certain height, such as a tree, does not directly hit the second sub-cutter 33 but hits the tire 52 at the outer edge of the rotating body 5.

When the obstacle hits the rotating body 5, the moving body 3 moves from the predetermined position horizontally toward the main cutter 103 as if the moving body 3 was pushed by the obstacle as the traveling vehicle body 1 traveled. As described above, in the mower A1, the mowing work can be performed smoothly without the moving body 3 being caught by the obstacle and the traveling being hindered.

Further, the moving body 3 is moving in a state where the rotating body 5 hitting the obstacle rotates in the circumferential direction along the surface of the obstacle as the mowing machine A1 travels. Since the friction is less likely to occur at the contact portion with the object, it moves smoothly. This allows the mower A1 to run smoothly and is less likely to be damaged.

The tire 52 is provided on the outer edge of the rotating body 5 and the obstacle hits the tire 52, so that the impact when the moving body 3 hits the obstacle can be softened. Thus, the moving body 3 is hardly damaged, and it is hard for the moving body 3 to damage the hit obstacle.

The moving body 3 hitting the obstacle as described above
However, when the gas damper D has moved from the predetermined position in the horizontal direction toward the main cutter 103, the gas damper D is in a contracted state. Accordingly, at this time, the moving body 3 is also subjected to a restoring force for returning the moving body 3 to a predetermined position by the gas damper D. For this reason, the moving body 3 moves along the obstacle, so that mowing can be performed at a location very close to the obstacle. Further, when the moving body 3 moves away from the obstacle, the gas damper D extends again and returns to the original state.

Since the rocking body 2 can rock vertically about the hinge member 12, for example, the mowing surface of the part where the rocking body 2 and the moving body 3 travel is mowing the part where the traveling vehicle body 1 travels. Even if it ’s more exciting than the face,
Since the rocking body 2 swings up and down so as to correspond to the undulation of the terrain, it is possible to cut grass on an uneven surface.

Further, the swinging member 2 can be lifted upward by the hinge member 12 and fixed in the raised state. Thus, when the mower A1 is carried or the like, the rocking body 2 and the moving body 3 can be kept out of the way. At this time, the hinge member 12 is provided with a tension coil spring 13..., And when the hinge member 12 is in a substantially horizontal state, it is in a slightly extended state. The restoring force of 13... Can be used, and it is easy to lift.

Since the protection member 6 extends obliquely rearward in the horizontal direction behind the moving body 3, for example, when the traveling vehicle body 1 is retracted, an obstacle is generated by the traveling vehicle of the rotating body 5. It is possible to prevent a force that moves the moving body 3 in a direction away from the traveling vehicle body 1 from being applied to the body 1 side. The moving body 3 can be moved in a direction approaching the traveling vehicle main body 1 even when the traveling vehicle main body 1 is retracted by hitting an obstacle against the rotating body 5 that is not protected by the protection member 6. Can be.

The sliding member 25 provided on the rocking body 2 is formed in a sled shape that slides on the grass-cutting surface, so that it can be used not only when moving forward and backward, but also when the vehicle slides sideways during work. It is possible to follow it without difficulty.

FIG. 4 shows a second embodiment of a mower according to the present invention, and is an explanatory view in plan view showing the moving state of a moving body in a horizontal direction by imaginary lines, and FIG. 5 shows the mower of FIG. FIG. 6 is a front view explanatory view showing the moving state of the moving body in the vertical direction by imaginary lines, and FIG. 6 is a side view explanatory view showing the mower of FIG. 4 to FIG.
The same or equivalent parts as those shown in FIG. 3 are denoted by the same reference numerals. In the following description, the description of the structure that overlaps with the part described above will be omitted.

Reference numeral A2 indicates a mower. Mower A
2 includes a traveling vehicle main body 1a, an oscillating body 2 and a moving body 3 provided on one side of the traveling vehicle main body 1a. In addition,
The traveling vehicle main body 1a is a general walking-type self-propelled mowing machine having the front wheels 15a, the driving wheels 16, the steering wheel 17, the engine 19, and the like, and a detailed description of the configuration will be omitted.

A cutting section 10a for cutting grass is provided at the center of the traveling vehicle body 1a. The cutting unit 10a includes a cover 100a and a vertical shaft 101a. Vertical axis 101
The main cutter 103a is attached to a.

On one side (left side in FIG. 4) of the cover 100a, the swinging body 2 is attached so as to be able to freely swing up and down around the hinge portion 14. A bevel gear 26, a universal joint 27, and a spline shaft 28 are provided between the vertical shaft 101a and the vertical shaft 21 of the oscillator 2, so that power can be transmitted even when the oscillator 2 moves up and down. (See FIG. 5).

The traveling vehicle body 1a at the upper rear part of the cover 20
More specifically, one end of the gas damper D constituting the return means is rotatably provided. One end of a tension coil spring K constituting a return means is rotatably mounted on the upper side of the front side of the cover 20 opposite to the traveling vehicle body 1a.
In the vicinity thereof, there are provided wheels 29 that run while rolling or slipping on the mowing surface.

A moving body 3 is provided on the rear side of the rocking body 2. Near the center of the upper part of the belt cover 4, the other end of the tension coil spring K is rotatably provided. The extension coil spring K is stationary in a contracted state, and cooperates with the gas damper D to keep the moving body 3 away from the main cutter 103a in a normal state.

On the upper part of the cover 30, a rotating body 7 as rolling means is provided. The rotating body 7 includes rotating shafts 70a, 70b, 70c, and 70d vertically extending upward from an edge of the cover 30 opposite to the traveling vehicle body 1a. Pulleys 71 are rotatably supported on the rotating shafts 70a, 70b, 70c, 70d so as to rotate in the horizontal direction. Each pulley 71 has the same shape.
An endless belt 72 is wound around the pulleys 71.

More specifically, the rotating shaft 70a is provided at a position in front of the vertical shaft 31, and the rotating shaft 70b is provided at a position slightly behind the rotating shaft 70a and outside the rotating shaft 70a. The rotation shaft 70c is provided at a position behind the rotation shaft 70b and further outside the rotation shaft 70b. The rotation shaft 70d is provided at a position behind the vertical shaft 31. Thereby, the belt 72 wound around the pulleys 71... Is positioned outside the rotation range of the second sub-cutter 33 on the side opposite to the traveling vehicle body 1a. At this time, the belt 72 moves forward between the rotating shaft 70a and the rotating shaft 70b and between the rotating shaft 70b and the rotating shaft 70c by providing the rotating shafts 70a, 70b, 70c, and 70d at the positions described above. Between the rotating shaft 70c and the rotating shaft 70d, the moving body 3 moves backward when the vehicle hits an obstacle so that the moving body 3 moves in a direction approaching the traveling vehicle main body 1a when hitting. The shape is such that it moves in the direction approaching 1a. Note that the belt 72 is formed of rubber having a required thickness, and is also an elastic cushioning member.

Reference numeral 9 denotes a pulling mechanism which can manually move the moving body 3 from a state where the moving body 3 is normally at a predetermined position to a position indicated by an imaginary line in FIG. The pulling mechanism 9 is provided near the base of the handle 17,
An operation lever 90 formed in a substantially “F” shape, a lever retaining member 91 that can stop the operation lever 90 at a predetermined position, an advance / retreat shaft 92 that moves forward / backward by operating the operation lever 90, and a moving body 3 And a link device R formed in a substantially “F” shape so as to approach the traveling vehicle body 1a.

On the lower side of the lever holding member 91, an engaging recess 910 is formed for hooking the rod-shaped portion of the operating lever 90 to fasten the operating lever 90. In the link device R, the bent portion is provided so as to be rotatable near the traveling vehicle main body 1a on the upper rear side of the cover 20, and the end of the long side is located near the traveling vehicle main body 1a on the upper rear side of the cover 30. It is provided rotatably.
The end of the short side of the operation lever 90 is rotatably connected to the base end of the reciprocating shaft 92, and the distal end of the reciprocating shaft 92 is rotatable with the end of the short side of the link device R. Connected.

(Operation) The operation of the embodiment of the present invention will be described with reference to FIGS. In addition, description of the same operation | movement and effect produced by the structure common to the above-mentioned mower A1 is abbreviate | omitted, and only a different point is demonstrated.

Since the belt 72 of the rotating body 7 is located outside the rotation range of the second sub-cutter 33 on the side opposite to the traveling vehicle main body 1a, it has a certain height such as a tree. The obstacle does not directly hit the second sub-cutter 33 but hits the belt 72.

When the obstacle hits the belt 72, the moving body 3 is pushed by the obstacle together with the traveling of the traveling vehicle body 1a, and the main cutter 103 is moved laterally from a predetermined position.
It moves in the direction approaching a. In addition, the rotating body 7 is configured to move substantially in parallel from a predetermined position without changing its direction (an imaginary line in FIG. 4), but this is not a limitation.

Further, the moving body 3 is moving in a state where the rotating body 7 hitting the obstacle rotates in the circumferential direction along the surface of the obstacle as the mower A2 travels. Since the friction is less likely to occur at the contact portion with the object, it moves smoothly.

Since the belt 72 is wound around the pulleys 71... And the obstacle hits the belt 72, the impact when the moving body 3 hits the obstacle can be softened.

The moving object 3 hitting the obstacle as described above
However, when the gas damper D is moved from the predetermined position in a direction laterally approaching the main cutter 103a, the gas damper D is contracted, and the tension coil spring K is extended. Therefore, at this time, the moving body 3 is also subjected to a restoring force for returning to the predetermined position by the gas damper D and the extension coil spring K. For this reason, the moving body 3 moves along the obstacle, so that mowing can be performed at a location very close to the obstacle. Further, when the moving body 3 moves away from the obstacle, the gas damper D expands, and the tension coil spring K contracts to return to the original state.

The rotator 7 connects the belt 72 with the pulley 71.
···························································································································································································· Also, since the pulleys 71... Are arranged at a required interval, dust and the like can be hardly clogged between the pulleys 71, 71, and troubles such as the pulleys 71. You can also.

At the time of mowing, the pulling mechanism 9 sets the link lever R to a state in which the operating lever 90 is not engaged with the engaging concave portion 910 of the lever fastener 91 and moves freely.
The moving body 3 can be moved without controlling.

In order to bring the moving body 3 closer to the traveling vehicle main body 1 a by the pulling mechanism 9, the operating lever 90 is pulled down and pushed down, and the bar is hooked on the engaging recess 910 of the lever fastener 91. As a result, the advancing / retreating shaft 92 is pushed forward, and the link device R is moved so that the short side is forward and the long side is closer to the traveling vehicle body 1a with the bent portion as the center. Thereby, the moving body 3 can be moved from a state where the moving body 3 is normally at a predetermined position to a position indicated by an imaginary line in FIG. 4, and the moving body 3 can be stopped in that state.

As described above, according to the pulling mechanism 9, the moving body 3 can be stopped in a state where the moving body 3 is brought close to the traveling vehicle body 1a, so that the mowing machine A1 can be easily handled when being transported and stored. be able to.

The rotating body 7 can be used for the above-mentioned mower A1. Further, the rotating body 5 shown by the mower A1 can be used for the mower A2.

FIG. 7 shows a third embodiment of the mower according to the present invention, and is a plan view explanatory view showing the moving state of the moving body in the horizontal direction by imaginary lines. In FIG. 7,
The same or equivalent parts as those shown in FIGS. 1 to 6 are generally denoted by the same reference numerals. In the following description, the description of the structure that overlaps with the part described above will be omitted.

A3 indicates a mower. Cover 3
A rotating body 8 serving as rolling means is provided above the zero.
The rotating body 8 is provided with rotating shafts 80a to 80g vertically extending upward from the edge of the cover 30 opposite to the traveling vehicle body 1a. Rollers 81 are rotatably supported on the rotation shafts 80a to 80g so as to rotate in the lateral direction. The roller 81 has the same shape.

More specifically, the rotating shaft 80a is provided at a position in front of the vertical shaft 31. Rotating shaft 80b-80f
Are provided at positions that gradually become outward from the front to the rear of the vertical shaft 31 toward the rear. The rotation shaft 80g is provided at a position substantially behind the vertical shaft 31. Roller 8
1 is the rotating shafts 80b, 80d, 80d, and 80g, with the shafts supported by the rotating shafts 80a, 80c, 80e, and 80g facing downward. 80f
Are arranged on the upper side, so that adjacent ones are vertically overlapped. As a result, the outer edge of the entire roller 81 is positioned outside the rotation range of the second sub-cutter 33 on the side opposite to the traveling vehicle body 1a. At this time, the outer edge of the roller 81 is provided between the rotation shafts 80a to 80c and the rotation shaft 80c by providing the rotation shafts 80a to 80g at the above-described positions.
Between 80f and 80g, when the moving body 3 moves backward and hits an obstacle, the moving body 3 moves in the direction approaching the traveling vehicle body 1a when the obstacle moves forward. The moving body 3 is shaped so as to move in a direction approaching the traveling vehicle body 1a.

(Operation) The operation of the embodiment of the present invention will be described with reference to FIG. In addition, the above-mentioned mowers A1, A
A description of the same functions and effects produced by the configuration common to the second embodiment will be omitted, and only the differences will be described.

Since the entire outer edge of the rollers 81... Is located outside the rotation range of the second sub-cutter 33 on the side opposite to the traveling vehicle body 1a,
An obstacle having a certain height such as a tree does not directly hit the second sub-cutter 33 but hits the rollers 81.

When the obstacle hits the rollers 81...
As the traveling vehicle body 1 travels, the moving body 3 moves from a predetermined position in a direction approaching the main cutter 103a in a lateral direction, as if pressed by an obstacle. In addition, the rotating body 8
Although it is made to move substantially in parallel from a predetermined position without changing the direction (the imaginary line in FIG. 7), this is not limited.

The moving body 3 is rotated by the rotating body 8 hitting an obstacle.
Move around the surface of the obstacle in a circumferential direction, so that friction is less likely to occur at a contact portion between the rotating body 8 and the obstacle, so that the body moves smoothly.

Each of the rollers 81... May be provided with a member serving as a buffer member at the outer edge.

In the mowers A2 and A3, the wheels 29 are used, but this can be replaced with a sled type as shown in the mower A1. Also, the mower A1 may use wheels as shown by mowers A2 and A3 instead of the sled type.

The rotating body 8 can be used for the mowers A1 and A2 described above. Further, the rotating body 5 shown by the mower A1 and the rotating body 7 shown by the mower A2 can be used for the mower A3.

The return means is not limited to the above-mentioned gas damper or tension coil spring, and other means can be used as long as the movable body can be returned to a predetermined position.

The terms and expressions used in the present specification are merely illustrative and not restrictive, and terms and equivalents of the features described in this specification and some of them may be used. There is no intention to exclude expression. It goes without saying that various modifications are possible within the scope of the technical idea of the present invention.

[0077]

The present invention has the above configuration and has the following effects. (A) According to the mower according to the present invention, the guard portion of the moving body may hit the obstacle when mowing the grass around the obstacle, but even if the moving body hits the obstacle, the moving body moves horizontally from a predetermined position. Since the moving body is moved in the direction or substantially in the horizontal direction, the mowing work can be smoothly performed without the moving body being caught by an obstacle and the traveling being hindered. The sub cutter moves with the movement of the moving body.

(B) Since there is provided a return means for returning the moving body to the original position when the moving body moves from the predetermined position, the moving body is simultaneously moved when the moving body moves from the predetermined position. There is also a restoring force trying to return to a predetermined position. For this reason, the moving body moves along the obstacle, thereby mowing a portion very close to the obstacle. Further, when the moving body is separated from the obstacle, the moving body returns to the original predetermined position by the above-described returning means.

(C) When the rolling means hits an obstacle during traveling, the rolling means rolls along or substantially along the surface of the obstacle. Since it moves, it is possible to make it difficult for friction to be generated at the contact portion between the rolling means and the obstacle, and to easily move the moving body from a predetermined position. Thus, even when the rolling means hits an obstacle, the mower can run smoothly and is hardly damaged.

(D) The rolling means is provided with a rotating body rotatable in a horizontal direction or a substantially horizontal direction, and the rotating body is provided so that an outer edge portion thereof is located outside a rotation range of the sub cutter. In some cases, the obstacle hits the rolling means so that the sub-cutter does not hit the obstacle directly.

(E) The rolling means is provided with a plurality of rotating bodies which are rotatable in the horizontal direction or substantially in the horizontal direction, and the rotating bodies have endless peripheral bodies positioned outside the rotation range of the sub-cutter. Since the rolling means can be arranged with the required interval provided,
A wide range can be guarded by a small number of rolling means. Further, since there is a gap between the rolling means, it is possible to make it difficult for dirt or the like to be clogged between the rolling means, and it is possible to prevent troubles such as the rotation means not rotating.

(F) The rolling means is provided with a plurality of rotating bodies which are rotatable in the horizontal direction or substantially in the horizontal direction, and the whole of the rotating body is outside the rotation range of the sub-cutter. The one provided so as to be positioned can freely form the shape of the rolling means according to the shape of the cover covering the sub cutter.

(G) When the sub-cutter is made swingable in the vertical direction so that the mowing of the surface intersecting with the mowing surface of the main cutter can be performed, the mowing surface of the portion where the sub-cutter travels is the main mowing surface. Even when the cutter is higher than the mowing surface where the cutter travels, the sub-cutter swings up and down to cope with the undulation of the terrain, so that mowing work on an uneven surface can be performed.

[Brief description of the drawings]

FIG. 1 is an explanatory plan view showing a first embodiment of a mower according to the present invention and showing a moving state of a moving body in a horizontal direction by imaginary lines.

FIG. 2 is an explanatory front view showing the mowing machine of FIG. 1 and showing a moving state of a moving body in a vertical direction by imaginary lines.

FIG. 3 is an explanatory side view showing the mower of FIG. 1;

FIG. 4 is a plan view illustrating a mowing machine according to a second embodiment of the present invention, in which a moving state of a moving body in a horizontal direction is represented by imaginary lines.

FIG. 5 is an explanatory front view showing the mowing machine of FIG. 4 and showing a moving state of a moving body in a vertical direction by imaginary lines.

FIG. 6 is an explanatory side view showing the mower shown in FIG. 4;

FIG. 7 is an explanatory plan view showing a third embodiment of a mower according to the present invention and showing a moving state of a moving body in a horizontal direction by imaginary lines.

[Explanation of symbols]

A1, A2, A3 Mower D Gas damper K Tension coil spring P1, P2 Tension pulley R Link member V1, V2 Belt 1, 1a Traveling vehicle body 10, 10a Cutting unit 100, 100a Cover 101, 101a Vertical shaft 102 Pulley 103, 103a Main cutter 12 Hinge member 120 Attachment member 121 Attachment member 122 Connecting member 13 Tension coil spring 14 Hinge part 15 Steering wheel 15a Front wheel 16 Drive wheel 17 Handle 18 Seat 19 Engine 2 Oscillator 20 Cover 21 Vertical axis 22 Pulley 23 Pulley 24 First 1 sub-cutter 25 sliding member 26 bevel gear 27 universal joint 28 spline shaft 29 wheels 3 moving body 30 cover 31 vertical shaft 32 pulley 33 second sub-cutter 4 belt cover 5 rotation 50 rotary shaft 51 wheel 52 tire 6 defense member 60 stays 7 rotator 70a, 70b, 70c, 70d rotary shaft 71 a pulley 72 belt 8 rotator 80a, 80b, 80c, 80d, 80e, 80f, 8
0g Rotating shaft 81 Roller 9 Pulling mechanism 90 Operating lever 91 Lever retaining member 910 Engagement concave portion 92 Advance / retreat shaft

Continued on the front page (72) Inventor Akira Kiyosu 22nd Hiyoshi 548, Hiyoshi, Hirokawa-cho, Yame-gun, Fukuoka Prefecture F-term in OLEC Corporation (reference) 2B083 AA02 BA12 BA17 BA18 BA20 CA28 GA01 GA02 GA06 HA01 HA53 HA59 HA60

Claims (8)

[Claims] 1. A self-propelled mowing machine having a movable body having a sub cutter on a side of a traveling vehicle body having a main cutter, wherein the movable body does not directly hit an obstacle. The movable body is provided at a predetermined position in a normal state, and is provided so as to be movable in a horizontal direction or a substantially horizontal direction when the guard unit hits an obstacle. The mowing machine further comprises a return means for returning the moving body to the original position when the moving body moves from the predetermined position. 2. A self-propelled mowing machine having a moving body having a sub cutter on a side of a traveling vehicle body having a main cutter, wherein the moving body does not directly hit an obstacle. The moving body is at a predetermined position in a normal state, and when the rolling means hits an obstacle, the rolling means moves along or substantially along the surface of the obstacle. Is provided so as to be able to move in the horizontal direction or substantially in the horizontal direction while rolling along, and further, the mowing machine moves the moving body when the moving body moves from the predetermined position. A mowing machine comprising a return means for returning to an original position. 3. A self-propelled mowing machine having a movable body having a sub cutter on a side of a traveling vehicle body having a main cutter, wherein the movable body does not directly hit an obstacle. The moving body is at a predetermined position in a normal state, and when the rolling means hits an obstacle, the rolling means moves along or substantially along the surface of the obstacle. Is provided so as to be movable in the horizontal direction or substantially in the horizontal direction by the link device while rolling along, and the mower is configured to move when the moving body moves from the predetermined position. A mowing machine comprising a return means for returning a moving body to an original position. 4. The rolling means includes a rotating body rotatable in a horizontal direction or a substantially horizontal direction, and the rotating body is provided such that an outer edge portion thereof is located outside a rotation range of the sub-cutter. The mower according to claim 2 or 3, wherein: 5. The rolling means includes a plurality of rotating bodies which can be rotated in a horizontal direction or a substantially horizontal direction, and an endless peripheral body is located outside the rotation range of the sub-cutter in the rotating bodies. The mower according to claim 2 or 3, wherein the mower is wound around the mower. 6. The rolling means includes a plurality of rotating bodies which are rotatable in a horizontal direction or a substantially horizontal direction, and the rotating bodies have their entire outer edges located outside the rotation range of the sub-cutter. The mowing machine according to claim 2, wherein the mowing machine is provided so as to perform cutting. 7. The method according to claim 1, wherein the sub-cutter is swingable in a vertical direction, so that a surface intersecting with a mowing surface of the main cutter can be cut. The mower according to 5 or 6. 8. A mowing method using a self-propelled mower equipped with a moving body having a sub cutter on a side of a traveling vehicle body having a main cutter, wherein the sub cutter does not directly hit an obstacle. A mowing method, wherein the moving body is moved in a horizontal direction or a substantially horizontal direction from a predetermined position when the guard unit hits an obstacle.