JP2002051608A - Travelable working machine and working unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a travelable working machine which causes no damage both to a working unit and an obstacle, when the working unit collides to the obstacle and escapes from the obstacle. SOLUTION: When the machine body 2 travels forward and the working unit 5 collides to the obstacle T, the working unit 5 is relatively pushed b the obstacle T whereby the working unit 5 escapes and rocks backward in the advancing direction of the machine body 2. At this time, even when the machine body 2 is allowed to go forward, a plurality of the guide rollers 28, 28,... equipped in series along the front edge 32 of the working unit rotate as they come into contact with the obstacle T and the resultant friction between the working unit and the obstacle becomes very small. Thus, both of the working unit 5 and the obstacle are never damaged.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention generally relates to a vehicle which is positioned so as to protrude outward in the left-right direction with respect to the traveling direction of a vehicle, and which is rearward in the traveling direction of the vehicle when the vehicle collides with an obstacle. The present invention relates to a working device that is capable of retracting and swinging, and a traveling work machine equipped with the working device. Specifically, for example, it is possible to cut grass around the root without damaging the trunk. ,
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting blade device that is positioned so as to protrude outward in the left-right direction with respect to the traveling direction of an airframe, and a traveling mower equipped with the cutting blade device.

[0002]

2. Description of the Related Art As an example of the traveling type mower described above,
For example, there is known a traveling mower that includes a cutting blade device that protrudes outward in the left-right direction of the fuselage, and that allows the cutting blade device to cut a wide grass while moving the fuselage. In the mowing machine, when the mowing blade device collides with an obstacle such as a pile or a tree during mowing, by allowing the mowing blade device to retract and swing backward in the traveling direction of the machine body. This can prevent the obstacle and the cutting blade device from being damaged.

Further, even if the cutting blade device collides with the obstacle, if the body is allowed to proceed as it is, the cutting blade device which retreats and swings by being relatively pushed by the obstacle, The grass around the obstacles can be successfully reaped.

[0004]

However, if the aircraft is to be advanced even after colliding with the obstacle, the front edge of the cutting blade device will rub the surface of the obstacle. If the cutting blade device is damaged, or if the obstacle is a growing tree, the tree may be damaged.

SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and a traveling type working machine which does not damage the working device or the obstacle when the working device retracts and swings due to a collision with the obstacle. It is an object to provide a working device, a cutting blade device and a cutting blade cover.

[0006]

According to a first aspect of the present invention, there is provided a traveling type working machine according to the present invention, wherein the traveling working machine projects laterally outward with respect to a traveling direction of the aircraft. A work device that is located and that can retreat and swing rearward in the direction of travel of the aircraft when the vehicle collides with an obstacle due to the advancement of the aircraft. Each of the guide rollers includes a group of guide rollers that rotate in contact with the obstacle in order during swinging.

According to the first aspect of the present invention, when the working device collides with the obstacle due to the advance of the airframe, the working device is relatively pushed by the obstacle, and
The aircraft retreats and swings backward in the traveling direction of the aircraft. At this time,
Even if the body is allowed to move as it is, the individual guide wheels forming the guide wheel group sequentially contact and rotate with the obstacle, so that the friction between the working device and the obstacle is low. Very small. Therefore, neither the working device nor the obstacle is damaged.

According to a second aspect of the present invention, there is provided a traveling work machine, which is positioned so as to protrude outward in the left-right direction with respect to the traveling direction of the aircraft and collides with an obstacle due to the advance of the aircraft. A working device that is capable of retracting and swinging rearward in the direction of travel of the body at times, wherein the working devices are arranged in line along the front edge thereof, and each longitudinal axis , Each of which has a guide wheel group in which each guide wheel can idle.

According to the present invention, when the working device collides with the obstacle due to the advance of the body, the working device is relatively pushed by the obstacle, and the working device is
The aircraft retreats and swings backward in the traveling direction of the aircraft. At this time,
Even if the machine body is allowed to move as it is, the guide wheels forming the guide wheel group sequentially contact the obstacle and rotate about the respective vertical axes, so that the working device and the obstacle The friction between them is very small. Therefore, neither the working device nor the obstacle is damaged.

According to a third aspect of the present invention, there is provided a traveling type working machine according to the second aspect, wherein the guide rollers are provided so as to extend from the front edge of the working device in a lateral direction of the working device. It is arranged so as to reach the outer edge.
With this configuration, the guide wheels sequentially contact and rotate with the obstacle until the working device retracts and swings and completely passes the obstacle, so that the working device and the obstacle are prevented from rotating. The certainty of protection is further improved.

According to a fourth aspect of the present invention, there is provided a traveling work machine according to the first, second or third aspect, wherein the guide wheel group is used to control a cutting blade as a working member of the working device. Mutual direct contact with the obstacle is prevented. With this configuration, the obstacle is not damaged by the cutting blade, and the cutting blade is not damaged by the obstacle. Moreover, when mowing an orchard by the traveling work machine, for example, the aircraft is caused to reversely reciprocate along both left and right sides of a row of trees as the obstacle, so that the entire root of the trunk is completely removed. The surrounding grass can be cut off neatly, which is more preferable.

According to a fifth aspect of the present invention, there is provided a working device attached to the body so as to protrude outward in the left-right direction with respect to the traveling direction of the body, and is used when the body advances. A work device capable of retreating and swinging rearward in the traveling direction of the body when colliding with, the guide roller group in which individual guide wheels sequentially contact and rotate with the obstacle during the retraction swing. It is provided. The functions and effects of the present invention described in claim 5 are the same as those in the case of claim 1.

According to a sixth aspect of the present invention, there is provided a working device according to the present invention, wherein the working device is attached to the body so as to protrude outward in the left-right direction with respect to the traveling direction of the body, and is used when the body advances. A work device that can retreat and swing backward in the direction of travel of the body when it collides with the vehicle, and guides that are arranged along the front edge of each of the guide wheels so that each guide wheel can idle around its longitudinal axis. It has a wheel group. The functions and effects of the present invention described in claim 6 are the same as those in the case of claim 2.

According to a seventh aspect of the present invention, there is provided a cutting blade device which is attached to the body so as to protrude outward in the left-right direction with respect to the traveling direction of the body, and is used for obstruction due to the movement of the body. A cutting blade device capable of retracting and swinging backward in the traveling direction of the aircraft when colliding with an object, comprising: a cutting blade;
A guide wheel group that prevents mutual direct contact between the cutting blade and the obstacle and guides individual rolling wheels in contact with the obstacle in order when the cutting blade device retreats and swings. It is a thing.

The cutting blade device according to the present invention is attached to the body so as to protrude outward in the left-right direction with respect to the traveling direction of the body, and is used when the body is moved. A cutting blade device capable of retracting and swinging backward in the traveling direction of the aircraft when colliding with an object, comprising: a cutting blade;
A cutting blade cover that covers the cutting blade, and a guide wheel group that is arranged along the front edge of the cutting blade cover and that allows each guide wheel to freely rotate around each longitudinal axis. It is.

According to the present invention, when the cutting blade device collides with the obstacle due to the advance of the airframe, the cutting blade device is pushed relatively to the obstacle, and the cutting blade device is moved.
The aircraft retreats and swings backward in the traveling direction of the aircraft. here,
Since the guide rollers are arranged in line at the front edge of the cutting blade cover, the guide rollers contact the obstacle, and both the cutting blade cover and the cutting blade are connected to the obstacle. Do not touch. The guide wheel, with the progress of the aircraft,
The friction between the cutting blade device and the obstacle is very small because the cutting blade device and the obstacle rotate in contact with the obstacle in order about the respective longitudinal axes. Therefore, neither the cutting blade device nor the obstacle is damaged.

According to a ninth aspect of the present invention, there is provided a cutting blade device according to the eighth aspect, wherein the guide rolling wheel extends from the front edge of the cutting blade cover to an outer edge in the left-right direction of the cutting blade cover. It is arranged so that it reaches to. With this configuration, the guide rollers sequentially contact and rotate with the obstacle until the cutting blade cover retreats and swings and completely passes through the obstacle, so that the cutting blade and the obstacle are prevented from rotating. The certainty of protection is further improved.

According to a tenth aspect of the present invention, there is provided a cutting blade cover having a horizontally long cover body for covering a cutting blade for mowing while moving, and a front edge portion in the traveling direction of the cover body, the lengthwise direction of which is provided. And a group of guide wheels that can be idled around the respective longitudinal axes.

[0019]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a plan view of a traveling mower as a traveling work machine according to an embodiment of the present invention, and FIG.
FIG. 2 is an enlarged sectional view taken along the line II-II of FIG.

Referring to FIG. 1, a traveling mower 1 according to the present embodiment uses an existing riding mower 2 as a vehicle for traveling and moving, and comprises four traveling wheels 3, 3, right and left.
A cutting blade device 5 as a working device according to an embodiment of the present invention is provided at a rear portion of the body frame 4 of the riding mower 2 supported by the riding mower 2.

The cutting blade device 5 includes a plurality of (three in this embodiment) horizontal rotary cutting blades 6 (6a, 6b, 6c) arranged along the left-right direction of the riding mower 2 as working members. Have. The respective cutting blade device-side cutting blades 6a, 6b, 6c are supported by a horizontally long cutting blade cover 7 extending outward in the left-right direction of the riding mower 2. It extends beyond the range and protrudes outward on one side in the left-right direction. For this reason, according to the traveling type mower 1, the riding mower 2 itself has a lower part of the fuselage frame 4 and has a fuselage side cutting blade 8 for mowing a plane parallel to a lower surface of the fuselage frame 4, With the respective cutting blade device-side cutting blades 6a, 6b, 6c of the cutting blade device 5, it is possible to cut a wide grass at a time while traveling toward the front F of the body frame 4.

The cutting blade device 5 is connected to the riding mower 2.
If the position can be freely adjusted in the left-right width direction, the cutting work position by the cutting blade device-side cutting blade 6 with respect to the traveling position of the riding mower 2 is appropriately selected to perform the cutting operation according to the work environment. Is preferred.

Each of the cutting blades 6a, 6b, 6c
Is driven by an internal combustion engine 9 as a traveling drive motor mounted on the body frame 4 of the riding mower 2 together with the machine side cutting blade 8. In the present embodiment, a cutting blade drive driven by the internal combustion engine 9 through a suitable transmission means (not shown) including a pulley and a belt is provided in a gear box 10 provided at a rear portion of the body frame 4. A rotating shaft of three identical cutting blade driving small gears 12a, 12b, 12c that rotatably supports the gear 11 and meshes with the cutting blade driving gear 11, and the cutting blades on the respective cutting blade device side. The rotation shafts 6a, 6b, and 6c are respectively connected to flexible transmission shafts 13 as driving force transmission members.
a, 13b, 13c are drivingly connected to each other.

Each of the cutting blades 6a, 6b, 6c
As shown in FIG. 2, a cutting blade support cup 14, 14, as a support member for supporting the respective cutting blade device-side cutting blades 6a, 6b, 6c at a predetermined ground height H on the ground G as shown in FIG. 14
have. The respective cutting blade support cups 14, 14, 14
Is freely rotatable regardless of the rotation of the respective cutting blade device side cutting blades 6a, 6b, 6c, and has a smooth curved lower surface 14a.
, And slides in contact with the ground G, and the cutting blades 6a, 6b, 6c of the respective cutting blade device sides are always kept at a predetermined ground height H on the ground G.
Let me keep.

In this embodiment, each of the cutting blades 6a, 6b, 6c on the cutting blade device side is of a horizontal rotation type rotating around a vertical axis, but may be of a so-called clipper type or the like. Is also good. The respective cutting blades 6a, 6b,
When the rotary blade 6c is a rotary blade, the blade may be a disk-shaped blade, a strip-shaped rotary blade, or a nylon cord-type blade.

The number of the cutting blades 6 on the cutting device side is not limited to three as in this embodiment, but may be one, two, four or more.

As shown in FIG. 1, between the side of the riding frame 2 of the riding mower 2 and the side of the cutting blade cover 7, the traveling of the riding mower 2 causes the cutting blade cover 7 to move.
However, when it comes into contact with an obstacle such as a trunk T of a mowing site, the cutting blade cover 7 moves backward B in the traveling direction of the riding mower 2.
Swinging portion 15 that allows the swinging of the cutting blade device side and the right outer end 6c side of the cutting blade 6 on the cutting blade device side to be able to swing vertically following the ups and downs of the ground G. Connecting part 1
6 and a front / rear tilt connecting portion 17 for allowing the cutting blade cover 7 to be tiltable back and forth around an axis X extending in the direction in which the cutting blade device-side cutting blade 6 is aligned.

The three connecting parts 15, 16 and 17 are connected to three pivots which are orthogonal to each other.
It includes a retreat swing pivot 18, a vertical swing pivot 19, and a front-back tilt pivot 20. Specifically, the retractable swing pivot 18 is fixed vertically upward to a cutting blade device mounting portion 21 formed at the rear portion of the body frame 4, and the retractable swing pivot 18 is The retractable swing cylinder 22 is rotatably mounted via a bearing (not shown).
The retractable swing cylinder 22 has the vertical swing pivot 19.
A vertically swinging cylindrical body 23 is rotatably mounted on the vertically swinging pivot shaft 19 via a bearing (not shown).
The vertical swinging pivot shaft 20 is attached to the vertical swinging cylinder 23.
The forward and backward tilting cylinder 24 is rotatably mounted on the forward and backward tilting pivot 20 via a bearing (not shown).
A cutting blade cover support arm 25 is fixed to the front-rear tilting cylinder 24, and the cutting blade cover 7 is fixed to the cutting blade cover support arm 25 in a state in which the cutting blade cover 7 is horizontal to the ground G. Have been.

In the above construction, when the riding mower 2 moves forward F, the respective cutting blades 6a, 6
b, 6c move forward while the cutting blade support cups 14, 14, 14 are kept in contact with the ground G, and
Reap the grass above. When the ground G is undulated, the cutting blade support cups 14, 14, 14 are followed by the vertical swing pivot 19 and / or the front-rear tilt pivot 20. , The cutting blades 6a, 6b, 6c on the cutting blade device side swing up and down or tilt back and forth integrally. For this reason, each cutting blade device side cutting blade 6
a, 6b, and 6c do not cut into the ground G or the like. In addition, while the riding mower 2 is advanced, the horizontal cutting blade 8 is used to cut the horizontal plane, and at the same time, each cutting blade device side is cut. The cutting blades 6a, 6b, 6c can cut grass on an inclined surface extending continuously to the horizontal plane. For example,
Embankment is often applied to the root of the trunk T, etc., but according to the configuration of the present embodiment, the riding mower 2
Is allowed to proceed as it is, so that mowing of the embankment can be performed.

As shown in FIG. 1, when the cutting blade cover 7 comes into contact with the tree trunk T or an obstacle such as a pile due to the forward movement of the riding mower 2, the cutting blade cover 7 has a horizontally long side. The cutting blade cover 7 extends from the normal cutting position NP extending outward in the left-right direction toward the traveling direction F of the riding mower 2, with the retracting swing pivot 18 as the center, in the traveling direction of the riding mower 2. It retracts and swings to the rear B.

When the cutting blade device 5 has passed the trunk T, the cutting blade device mounting portion 21 and the retractable swinging cylinder 2
The cutting blade cover 7 is automatically returned to the normal cutting position NP by the tension coil spring 26 for returning the cutting blade cover as the cutting blade cover returning means stretched between the two sides. The cutting blade cover 7 includes a tension urging force of the tension coil spring 26 for returning the cutting blade cover and the cutting blade device mounting portion 21.
And the stopper 27 formed on the side of the retractable swinging cylinder 22 so as to abut on the side of the retractable swinging cylinder 22.
Is held in.

As described above, the riding mower 2
From each internal combustion engine 9 to the respective cutting blade device side cutting blade 6
Since the transmission of the driving force to the a, 6b, 6c is performed through the respective flexible transmission shafts 13a, 13b, 13c, even if the relative position of the cutting blade cover 7 with respect to the riding mower 2 changes, the aforementioned There is no problem in transmitting the driving force.

The guide blades 28 of the cutting blade device 5 are moved by the guide wheels 28, 28,... When the riding mower 2 retreats and swings backward B in the traveling direction due to the contact with the tree trunk T. And a guide wheel group 29 that comes into contact sequentially with the wheel and idles.
Each of the guide rollers 28, 28,... Has the same shape and a small diameter, and the right and left of the cutting blade cover main body 30 forming the cutting blade cover 7 in the traveling direction F of the riding mower 2. Along the outer leading edge 31 that extends in the direction, there is a slight spacing between adjacent ones.

In the present embodiment, the cutting blade cover body 3
0 to the cutting blade cover main body 30 so that only the rear portion 32a thereof overlaps the upper front portion 30a of the cutting blade cover main body 30. Fixed to the guide wheel support plate 3
2, the guide rollers 28, 28,... Via a guide roller support shaft 33 extending in the vertical direction (up and down direction).
・ They are rotatably mounted. Since the front portions of the peripheral surfaces of the guide rollers 28 protrude forward from the front edge 32b of the guide roller support plate 32, the cutting blade cover main body 30 is also cut. Blade device side cutting blade 6
Also, there is no direct contact with the trunk T.

It is desirable that the guide wheels 28, 28,... Be made of rubber or soft plastic from the viewpoint of the protection of the trunk T.

According to the present embodiment, when the mowing blade device 5 collides with the tree trunk T due to the forward movement of the riding mower 2, the mower 2 is pushed relatively to the tree trunk T, and The cutting blade device 5 retreats and swings to the rear R in the traveling direction of the riding mower 2. At this time, even if the riding mower 2 proceeds forward F as it is, each of the guide rollers 28, 28,... The friction between the cutting blade device 5 and the tree trunk T is very small because the guide wheel is smoothly rotated around the respective guide wheel support shafts 33. Therefore, the cutting blade device 5
Neither nor the trunk T is damaged.

Further, as shown in FIG. 2, the cutting blade 6 on the side of the cutting blade device does not come into direct contact with the trunk T.
The surface of the trunk T is not cut by the cutting blade device-side cutting blade 6, and the cutting blade device-side cutting blade 6 is not damaged by the trunk T.

That is, according to the present embodiment,
By running the riding mower 2 so that the outer side of the cutting blade device 5 is intentionally brought into contact with the trunk T, mowing can be performed to a position near the root of the trunk T. Even in this case, Damage to the trunk T and damage to the cutting blade device 5 are prevented.

In addition, as shown in FIG. 3, when the orchard is mowing by the traveling mower 1, for example, on the outward path F1, the left and right outer ends of the cutting blade device 5 are connected to the trunks T. After traveling on the left side of the tree along the tree row so as to abut against the trunk, the direction of the riding mower 2 is reversed, and the left and right outer ends of the cutting blade device 5 are attached to the trunks T on the return path F2. By running on the right side of the tree row so as to abut, it is possible to mow the grass between the trunks T in addition to the left wide area L and the right wide area R of the tree row. . That is, according to the traveling mower 1, simply by reversing the left and right sides of the tree along the tree row to reciprocate, the grass around the root of each trunk T can be neatly cut.

Further, in the present embodiment, as shown in FIG. 1, the guide wheel group 29 is moved from the front edge 32b of the guide wheel support plate 32 to the outer edge 32 in the left-right direction.
The rows are arranged so as to reach c. Therefore, the guide wheel group 2 is moved until the cutting blade device 5 retreats and swings to the rear B of the riding mower 2 and completely passes through the tree trunk T.
Since 9 rotates in contact with the trunk T, the reliability of protection of the cutting blade device 5 and the trunk T is further improved.

The above-described cutting blade device 5 according to the present embodiment can be used by being attached to a walking operation type body in addition to a riding type traveling body as in the present embodiment.

In the present embodiment, the working device according to the present invention has been described by taking a cutting blade device as an example. However, as another working device, for example, a rotary tillage device such as a tilling device may be used. It is possible to apply

[Brief description of the drawings]

FIG. 1 is a plan view of a traveling mower as a traveling work machine according to one embodiment of the present invention.

FIG. 2 is an enlarged sectional view taken on line II-II of FIG.

FIG. 3 is a plan view showing an example of a mowing method using the traveling mower of FIG. 1;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 traveling work machine (traveling mower) 2 body (riding mower) 5 working device (cutting blade device) 6 cutting blade 7 cutting blade cover 28 guide wheel 29 guide wheel group 30 cover body 32b front edge 32c left and right Outer edge of direction 33 Vertical axis B Backward in traveling direction F Forward in traveling direction T Obstacle (tree trunk)

Claims (10)

[Claims] 1. An airframe (2), which protrudes outward in the left-right direction with respect to a traveling direction (F) of the airframe (2) and collides with an obstacle (T) by the advancement of the airframe (2). A working device (5) that is capable of retracting and swinging backward (B) in the traveling direction of the body (2) when the work device (2) is moved. , The guide wheels (28, 28,...) Contact the obstacle (T) and rotate freely during the retraction swing.
A traveling work machine comprising 9). 2. An airframe (2), which protrudes outward in the left-right direction with respect to a traveling direction (F) of the airframe (2) and collides with an obstacle (T) by the advancement of the airframe (2). A working device (5) that is capable of retracting and swinging backward (B) in the traveling direction of the body (2) when the work device (2) is moved. , Each of which is aligned along its front edge (32b) and has a respective longitudinal axis (33).
, A guide wheel group (29) in which each guide wheel (28, 28,...) Can rotate freely. 3. A row of the guide rollers (28) extending from the front edge (32b) of the working device (5) to an outer edge (32c) of the working device (5) in the left-right direction. The traveling work machine according to claim 2, which is provided. 4. The guide wheel group (29) prevents direct contact between the cutting blade (6) as a working member of the working device (5) and the obstacle (T). Item 4. A traveling work machine according to item 1, 2 or 3. 5. The airframe (2) so as to protrude outward in the left-right direction with respect to the traveling direction (F) of the airframe (2).
A working device (5) that is attached to the device and is capable of retracting and swinging backward (B) in the direction of travel of the body (2) when the body (2) collides with an obstacle (T) due to the progress of the body (2). ,
The individual guide wheels (28, 28,...)
A working device comprising: a guide wheel group (29) that rotates in contact with the obstacle (T) in sequence. 6. The airframe (2) so as to protrude outward in the left-right direction with respect to the traveling direction (F) of the airframe (2).
A working device (5) that is attached to the device and is capable of retracting and swinging backward (B) in the direction of travel of the body (2) when the body (2) collides with an obstacle (T) due to the progress of the body (2). ,
Each guide wheel (28, 28,...) Is arranged in line along the front edge (32b) and around each longitudinal axis (33).
・) Is provided with a guide wheel group (29) which can idle.
Working equipment. 7. The airframe (2) so as to protrude outward in the left-right direction with respect to the traveling direction (F) of the airframe (2).
And a cutting blade device (5) that is attached to the cutting device (5) and that can retreat and swing backward (B) in the direction of travel of the body (2) when the body (2) collides with an obstacle (T) due to the movement of the body (2). hand,
The cutting blade (6) prevents direct contact between the cutting blade (6) and the obstacle (T), and the individual guide rollers (28, 28) when the cutting blade device (5) retracts and swings. ,...) Are in contact with the obstacle (T) in order to rotate freely. 8. The body (2) so as to protrude outward in the left-right direction with respect to the traveling direction (F) of the body (2).
And a cutting blade device (5) that is attached to the cutting device (5) and that can retreat and swing backward (B) in the direction of travel of the body (2) when the body (2) collides with an obstacle (T) due to the movement of the body (2). hand,
Cutting blade (6) and cutting blade cover (7) covering the cutting blade (6)
, Each guide wheel (28, 28,...) Is freely rotatable around a respective longitudinal axis (33) along the front edge (32b) of the cutting blade cover (7). Guide wheel group (2
9), a cutting blade device comprising: 9. The guide wheel (28) is arranged in a row from the front edge portion (32b) of the cutting blade cover (7) to an outer edge portion (32c) in the left-right direction. The cutting blade device according to claim 8. 10. A cutting blade (6) for mowing while moving forward.
A horizontally long cover body (30) for covering the
0) in the forward direction (F) in the advancing direction (F) along the length direction thereof, and each guide wheel (28, 28,...) Around each longitudinal axis (33). And a guide wheel group (29) that can rotate freely.