JP5057765B2 - Method for preventing scattering of objects due to rotation of cutter in mower and mower - Google Patents

Description

  The present invention relates to a method for preventing scattering of an object due to rotation of a cutter in a mower and a mower. More specifically, in a mower equipped with a cutter that rotates in the horizontal direction on the lower side of the vehicle body, when the opening between the vehicle body and the steering wheel expands due to the movement of the steering wheel, the blocking member moves and expands. This effectively closes the open openings and prevents the scattering of objects such as grass, earth, and pebbles caused by the swirling wind by the rotation of the cutter and the flying of the cutter, thereby ensuring the safety of workers and the work environment. It relates to things that prevent deterioration.

  For example, a mower equipped with a cutter that rotates horizontally on the underside of the vehicle body covers the cutter for safety, and a hanging part to prevent scattering (splashing) of grass and pebbles to the surroundings A cutter cover is provided. Unlike the other parts of the cutter cover, the drooping section stops the scattered grass and other parts of the cutter so that it does not fall down on the side of the mower moving direction, that is, on the side where the grass to be mowed enters. Cannot be established.

When the steered wheel is the front wheel, a sufficiently large space is provided on the front side of the cutter cover so as not to hinder the movement when the front wheel is steered. This space is on the side where the hanging part in front of the cutter cover is not provided.
For this reason, at the time of mowing work, pebbles and the like flipped by a rotating cutter escape from the space and jump to the outside, which is very dangerous.

  In addition, the swirling wind of the cutter blows grass and dirt through the space, which not only makes the working environment worse for the operator who is driving, The burden of maintenance, such as cleaning, has also increased.

  In order to solve this problem, the present inventor proposed a means capable of preventing the scattering of grass, soil and stone in Patent Document 1. The mower described in Patent Literature 1 is provided with a hanging plate fixed to the inner side of the edge forming the space portion where the steering wheel on one side is arranged and the front side end portion of the cutter cover (see Patent Literature 1). (See FIG. 5). According to this, each said problem was able to be improved.

JP 2002-112613 A

However, it has been found that the mower described in Patent Document 1 has the following problems that are desirably improved in actual use.
In other words, although each of the above problems could be improved to some extent by providing each hanging plate on the edge that forms the space where the steering wheel is arranged, each hanging plate is fixed, so that it is particularly useful during steering. When the steering wheel moves and the opening is greatly opened, the above-mentioned jumping out and blowing up easily occur, and the effect is not necessarily sufficient.

(Object of the present invention)
An object of the present invention is to provide a mower having a cutter that rotates in the horizontal direction on the lower side of a vehicle body, and the closing member moves even when the opening between the vehicle body and the steering wheel moves and expands. Effectively block the widened opening, and more reliably prevent the scattering of objects such as grass, earth and pebbles caused by the swirling wind by the rotation of the cutter and the blow of the cutter It is to prevent the work environment from deteriorating.

  Means taken by the present invention to solve the above problems are as follows.

The present invention includes a cutter device having a steering device and a steering wheel that moves by operation of the steering device at a front portion, a cutter that rotates horizontally in a lower side of a vehicle body, and a cutter cover that covers the cutter. In front of the device, there is a space that does not hinder the movement of the steering wheel between the steering device, the cutter cover has hanging parts on both sides and the rear side, and the hanging side on the front side where the grass enters In mowers not equipped with
The steering from the straight state, the opening between the vehicle body and the steering wheel, when the spread by the movement of the steering wheel with the steering, is moving closure member by movement of the steering or steering wheel, the spread opening This is a method for preventing scattering of an object due to rotation of a cutter in a mower, which closes or narrows a portion.

The present invention includes a cutter device having a steering device and a steering wheel that moves by operation of the steering device at a front portion, a cutter that rotates horizontally in a lower side of a vehicle body, and a cutter cover that covers the cutter. In front of the device, there is a space that does not hinder the movement of the steering wheel between the steering device, the cutter cover has hanging parts on both sides and the rear side, and the hanging side on the front side where the grass enters A mower not equipped with
The mower includes a closing member that closes or narrows the expanded opening when the opening between the vehicle body and the steering wheel expands due to movement of the steered wheel accompanying the operation of the steering device. And
The closing member is a mower that transmits the movement of the steering device or the steering wheel directly or via a transmission mechanism.

The present invention includes a cutter device having a steering device and a steering wheel that moves by operation of the steering device at a front portion, a cutter that rotates horizontally in a lower side of a vehicle body, and a cutter cover that covers the cutter. In front of the device, there is a space that does not hinder the movement of the steering wheel between the steering device, the cutter cover has hanging parts on both sides and the rear side, and the hanging side on the front side where the grass enters A mower not equipped with
When the upper opening between the vehicle body and the steering wheel expands due to the movement of the steering wheel accompanying the operation of the steering device, the mower moves in the horizontal direction and closes the expanded opening. It has a closing member that narrows,
The closing member is a mower that transmits the movement of the steering device or the steering wheel directly or via a transmission mechanism. This is referred to as a “lateral movement type” for the convenience of later description.

The present invention includes a cutter device having a steering device and a steering wheel that moves by operation of the steering device at a front portion, a cutter that rotates horizontally in a lower side of a vehicle body, and a cutter cover that covers the cutter. In front of the device, there is a space that does not hinder the movement of the steering wheel between the steering device, the cutter cover has hanging parts on both sides and the rear side, and the hanging side on the front side where the grass enters A mower not equipped with
Wherein among the cutter cover surrounding the cutter, the opening between the side and the steering wheel to be those hits that blown by cutter, when spread by the movement of the steering wheel due to the operation of the steering device, moving in the horizontal direction A closing member for closing or narrowing the expanded opening;
The closing member is a mower that transmits the movement of the steering device or the steering wheel directly or via a transmission mechanism. This will be referred to as a “cover attachment rotation type” for the convenience of later description.

The present invention includes a cutter device having a steering device and a steering wheel that moves by operation of the steering device at a front portion, a cutter that rotates horizontally in a lower side of a vehicle body, and a cutter cover that covers the cutter. In front of the device, there is a space that does not hinder the movement of the steering wheel between the steering device, the cutter cover has hanging parts on both sides and the rear side, and the hanging side on the front side where the grass enters A mower not equipped with
When the rear side of the steering wheel is turned inward in accordance with the operation of the steering device, the steering wheel is pushed inward to move inward, and the steering wheel moves inward. When the rear side pivots outward, it moves following the steering wheel until it stops at the required angle, and the rear side of the steering wheel pivots outward to form an opening between the vehicle body and the steering wheel. And, at the stop position, a closing member that closes or narrows the opening,
The closing member is a mower that transmits the movement of the steering device or the steering wheel directly or via a transmission mechanism. This will be referred to as an “axle side rotation type” for convenience of later explanation.

(Function)
The operation of the mower of the present invention will be described. Here, each constituent element used in the description is assigned in correspondence with a reference numeral given to each part in the embodiment described later, and this reference sign is described in each claim of the claims. As in the case of the reference numerals, this is merely to facilitate understanding of the description, and the meaning of each component is not limited to the above-described parts.

When the mower is a riding-type mower, an operator gets on the mower (A1, A2, A3) and operates, and the mower is driven by rotating the cutter.
In the mowing work, cutting grass and dust are blown off in the rotation direction by cutting and turning wind pressure due to the cutter rotating at high speed. Also, pebbles and the like may be blown away with a rotating cutter.

  Most of the blown grass, dirt or pebbles hit the hanging part (62, 63) of the cutter cover (65) that covers the cutter and fall to the ground, but some of them fall to the ground. It is made to fly toward the steered wheel (8) where (62, 63) is not provided. When the mower is traveling straight, the opening (100, 101) is narrowed so as to be almost closed by the steering wheel (8), so that it is prevented that an object jumps out of the opening (100, 101).

  When the steering wheel (8) moves to change the traveling direction, the opening (100, 101) between the vehicle body and the steering wheel (8) expands. The closing member (70, 74, 76) moves along with the movement of the steered wheel (8) by the steering, and closes or narrows the expanded opening (100, 101). Thereby, even when the opening (100, 101) in the vicinity of the steered wheel (8) is widened by steering, it is possible to prevent or reduce scattering of objects blown off by rotation of the cutter to the outside of the vehicle body.

When the closing member is a “laterally moving type”, it operates as follows.
When the steering wheel (8) faces straight ahead, the upper opening (100) between the vehicle body and the steering wheel (8) is blocked or narrowed by the blocking member (70). Therefore, it is prevented or reduced that mowing grass, dust, pebbles, etc. blow up to the upper part of the frame (1) and the cutter cover (65) through the opening (100).

  When steering is performed to change the traveling direction, the steering wheel (8) moves and the horizontal angle changes. Along with this, the size of the opening (100) on the upper side changes and expands, but the opening (100) leading to the outside of the vehicle body is blocked by a blocking member (70) that moves in the horizontal direction with steering, Or narrow.

  As described above, when the closing member is “laterally movable”, the opening (100) on the upper side can be closed or narrowed by the closing member (70) during straight travel and during steering. In addition, it is possible to prevent or reduce cutting grass, dirt, pebbles and the like from blowing up through the opening.

When the closing member is a “cover mounting rotation type”, it operates as follows.
When the steered wheel (8) is directed straight, the opening (101) between the vehicle body and the steered wheel (8) is covered or narrowed by the steered wheel (8). It is prevented or reduced that mowing grass, dirt, pebbles, etc. jump out of the vehicle body through this opening (101).

  When steering is performed to change the traveling direction, the steering wheel (8) moves and the angle in the horizontal direction changes, and the rear side of the steering wheel (8) enters or exits the vehicle body. Accordingly, the size of the opening (101) between the vehicle body and the steering wheel (8) changes. When the opening (101) is expanded by the movement of the steering wheel (8), the closing member (74) moves to a position where the opening (101) is closed or narrowed.

  As described above, when the closing member (74) is of the “cover mounting rotation type”, the expanded opening (101) is closed or narrowed by the closing member (74) during both straight travel and steering. Therefore, it is possible to prevent or reduce the scattering of mowing grass, dust, pebbles, etc. to the outside of the vehicle body through the opening (101).

The above-mentioned closing member having the “axle side rotation type” operates as follows.
When the steered wheel (8) is directed straight, the opening (101) between the vehicle body and the steered wheel (8) is formed by the steered wheel (8) and the closing member (76) disposed inside thereof. Since it is almost closed or narrowed, it is prevented or reduced that mowing grass, dirt, pebbles, etc. jump out of the vehicle body through this opening (101).

  When steering is performed to change the traveling direction, the steering wheel (8) moves and the horizontal angle changes, and the rear side of the steering wheel (8) enters or exits the vehicle body. Accordingly, the size of the opening (101) between the vehicle body and the steering wheel (8) changes. When the rear side of the steering wheel (8) enters the inside of the space (10) by the movement of the steering wheel (8), the closing member (76) is pushed by the steering wheel (8) and moves inward. When going out, it is possible to stop at the required angle without following the steering wheel (8) and close or narrow the opening (101).

  As described above, when the closing member (76) is the `` axle side rotation type '', the opening (101) between the vehicle body and the steered wheel (8) can be closed ( 76), it is possible to prevent or reduce scattering of mowing grass, dirt, pebbles, etc. through the opening (101) to the outside of the vehicle body.

According to the present invention, in the mowing operation, even if steering is performed to change the traveling direction of the mower, and the steering wheel moves and the opening between the vehicle body and the steering wheel expands, the blocking member can be The opening that has moved and expanded with the movement of can be closed or narrowed.
As a result, even if the opening between the vehicle body and the steered wheels is widened by steering, it is possible to prevent or reduce scattering of mowing grass, dirt, pebbles, and other objects that are blown off by the rotation of the cutter. It is possible to prevent the deterioration of the work environment while ensuring safety.

  The present invention will be described in detail based on the embodiments shown in the drawings.

FIG. 1 is a perspective view showing a first embodiment of a mower according to the present invention,
FIG. 2 is a perspective explanatory view at the time of straight traveling showing a steering device and a cutter device including the scattering prevention device of the mower shown in FIG.
FIG. 3 is an explanatory diagram in plan view when going straight.
FIG. 4 is an explanatory plan view showing a state in which the left turn is steered from the state of FIG.

The riding mower A1 has a frame 1 made of a metal pipe, and a prime mover 2 is mounted on the rear portion of the frame 1. A body 3 is mounted on the frame 1, and a seat 4 is fixed thereon. A steering device (steering device) 5 is provided at the front portion of the frame 1.
A cutter device 6 is provided under the frame 1. Between the steering device 5 and the cutter device 6, a scattering prevention device 7 according to the present invention is provided. Reference numeral 8 is a front wheel which is a steering wheel, and 9 is a rear wheel which is a driving wheel.
In the description of the structure of the riding type mower A1, the description of the structure of parts not directly related to the present invention, such as a power transmission device such as a traveling system and a cutter driving system, a braking device, and a suspension device, is omitted.

The cutter device 6 includes a cutter cover 65, a horizontal rotary cutter (not visible in the drawing), and a cutter drive system 60. The cutter cover 65 has an upper surface plate 61 on which a cutter drive system 60 is provided. On the left and right sides of the upper surface plate 61 with respect to the traveling direction, hanging plates 62 are provided over the entire length of the upper surface plate 61. A rubber hanging curtain plate 63 is provided at the rear portion of the upper surface plate 61 and is inclined downward toward the rear.
Although not shown in the drawing, the hanging plate 62 and the hanging curtain plate 63 as described above are not provided at the front portion of the upper surface plate 61 so as to prevent the grass entering from the front side from falling down.

  In front of the cutter device 6, a space 10 is provided for arranging both front wheels 8 between the steering device 5 (the space 10 is not shown as a whole for convenience of illustration). Needless to say, the space portion 10 does not hinder the movement of the front wheels 8 (the same applies to the space portions of the riding mowers A2 and A3 described later). An upper portion of the space 10 is disposed so as to cover a closing member 70 of the anti-scattering device 7 described later, and an opening 100 is formed between the inner surface of the front wheel 8 and the chassis 19 that is a vehicle body. Both openings 100 are portions constituting the space 10.

The steering device 5 has a steering 50. Reference numeral 51 denotes a movable member that moves forward and backward in the left-right direction via a rack and pinion mechanism (not visible in the figure: covered with a rubber bellows 59) by rotating the steering 50. L-shaped connecting fittings 52 are fixed to both ends of the movable member 51, and one end of a link member 53 is attached to the horizontal portion of each connecting fitting 52 in the left-right direction. The other end of the link member 53 is connected to a bearing 80 for steering the front wheel 8.
A push bar 54 is provided upward near the tip of the horizontal portion of each connecting fitting 52. Each push bar 54 abuts on a link arm 72 of the anti-scattering device 7 to be described later and is operated by pushing.

The scattering prevention device 7 has a mechanism for moving the closing member 70 in the left-right direction in conjunction with the movable member 51.
The anti-scattering device 7 includes a support member 71 that is fixed and provided in front of the movable member 51 in parallel. One end of the link arm 72 is pivotally supported on the left and right sides of the support member 71 so as to be rotatable in the horizontal direction. Each link arm 72 is bent downward substantially in the middle of the longitudinal direction, and its tip (lower end) is bent so as to be short and horizontal. Each link arm 72 is provided so as to be in contact with the outside of the push bar 54 and to be parallel to each other.

  At the front end of each link arm 72, a plate-like closing member 70 having the shape shown in the drawing is pivotally supported horizontally so as to be pivotable in the horizontal direction. A reinforcing metal fitting 73 is fixed to a portion of the closing member 70 where the link arm 72 is attached. The mechanism for moving the closing member 70 in the left-right direction constitutes a transmission mechanism. The structure of the transmission mechanism is not particularly limited, and a mechanism using a link as in this embodiment, a mechanism operated by a wire, and the like can be adopted.

  The blocking member 70 includes a narrow portion 70a on the front side and a wide portion 70b on the rear side. The width of the narrow portion 70a is set to such a length that a slight gap is provided between the inner surfaces of both front wheels 8 facing the straight traveling direction. The wide portion 70b is formed to be slightly shorter than the width of the front end of the cutter cover 65 (see FIG. 3). The width of the closing member 70 in the front-rear direction is formed such that the space 10 can be closed. And the edge of the said narrow part 70a and the wide part 70b and the part which connects them become the edge 700 which forms the opening part 100a between the front wheels 8. FIG.

(Function)
With reference to FIG. 1 thru | or FIG. 4, the effect | action of the scattering prevention apparatus 7 based on this invention and the riding-type mower A1 which has it is demonstrated.

  An operator rides on the riding-type mower A1 and operates, and the mowing work is performed by rotating the cutter while traveling. In mowing work, cutting grass and dust are blown away in the rotational direction by cutting force and wind pressure generated by the cutter rotating at high speed. Most of the blown grass and dirt hit the drooping portion of the cutter cover 65 covering the cutter and fall to the ground.

  Further, a part of the mowed grass and dust is blown away in the direction of the front wheel 8 (front) where the hanging portion is not provided in the cutter cover 65, but the space 10 is almost blocked by the closing member 70. And dust can be prevented or reduced from blowing up through the opening and above the frame 1 and the cutter cover 65.

  As shown in FIG. 4, when steering is performed so as to change the traveling direction to the left by operating the steering wheel 50, the front wheel 8 moves to change the horizontal angle, and the opening 100 is expanded. Along with this, the movable member 51 moves to the right, whereby the right push bar 54 pushes the link arm 72 to the right, and each link arm 72 rotates, and the closing member 70 moves to the rear side of the front wheel 8. Move to the right to follow.

Thereby, the opening part 100a of the inner surface of the rear part side of the front wheel 8 and the both edges 700 of the closing member 70 becomes narrower than the case where the closing member 70 does not follow.
In this way, the opening 100a can be maintained in a relatively narrow state by closing the opening 100 with the closing member 70 both during straight travel and during steering, so that mowing grass and dirt pass through the opening 100a. Blowing upward can be prevented or reduced.

  Further, as described above, since the opening 100a can be maintained in a relatively narrow state by closing the opening 100 with the closing member 70, for example, an operator can perform cleaning while the riding mower A1 is stopped. When performing maintenance work such as inspection and inspection, it is possible to prevent accidents such as injuries caused by excessively pinching the opening 100a.

FIG. 5 is a perspective view showing a second embodiment of the mower according to the invention,
FIG. 6 is a plan view explanatory view in a straight line representing a steering device and a cutter device including the scattering prevention device of the mower shown in FIG.
FIG. 7 is a plan view explanatory view showing a state in which the left turn is steered from the state of FIG.
FIG. 8 is an explanatory plan view showing a state where the vehicle is turned right from the state shown in FIG.
In the description of the present embodiment, the same parts as those in the riding mower A1 are denoted by the same reference numerals in the drawings, and the description of the structure is basically omitted.

In the riding mower A2, a scattering prevention device 7a is provided at the front end of the cutter cover 65 on the right side (the lower side in FIGS. 7 and 8) on which more objects are blown by the rotation of the cutter. . An opening 101 is formed between the right side front wheel 8 and the chassis 19 in the vicinity of the rear side of the front wheel 8 in the space 10 in which the right front wheel 8 is arranged. The scattering prevention device 7a can be provided on the left side in addition to the right side.
The scattering prevention device 7 a has a closing member 74. The closing member 74 is formed in a plate shape so as to substantially conform to the outer shapes of the upper surface plate 61 and the hanging plate 62 of the cutter cover 65 in the vertical direction, and the lower end portion is slightly lower than the lower end of the hanging plate 62. An upper end portion of the closing member 74 is formed in a substantially triangular shape, and a tip end portion thereof is pivotally supported by a shaft 740 so as to be rotatable in the horizontal direction with respect to the upper surface plate 61.

  The closing member 74 is urged outwardly (clockwise in FIG. 6) by a spring (not shown). Under normal conditions, the closing member 74 abuts against a stopper 741 provided to protrude from the hanging plate 62 and is suspended from the upper plate 61. It stops at a position on the outer surface side of the plate 62. The closing member 74 is rotatable between the stop position shown in FIG. 6 and the stop position shown in FIG. At the stop position shown in FIG. 7, the closing member 74 closes the right front portion (inside the space 10) of the cutter cover 65 so that no object passes.

  In addition, one end of the operation wire 750 of the wire-inserted tube 75 for moving the closing member 74 (on the side of the fixture 79 described later) is attached to the front portion of the closing member 74. The wire insertion tube 75 is obtained by passing the operation wire 750 through the protection tube 751, and both ends of the protection tube 751 are fixed to required portions of the vehicle body via fixtures 78 and 79.

  The other end of the operation wire 750 (the above-described attachment 78 side) is fixed to a required portion of the link member 53. A portion where the end portion of the operation wire 750 is fixed is in the vicinity of the end portion of the protective tube 751 when the front wheel 8 is directed straight.

  The fittings 78 and 79 are provided with guide pulleys 780 and 781 for guiding the operation wire 750 and guide pulleys 790 and 791 arranged in the horizontal direction near the respective ends of the protective tube 751. . The operation wire 750 is passed between the guide pulleys 780 and 781 and between the guide pulleys 790 and 791.

  The mechanism for moving the closing member 74 constitutes a transmission mechanism. According to this mechanism, the operation member 81 is rotated when the front wheel 8 is rotated, for example, with steering in the left direction, and the link member 53 connected to the operation member 81 and the pin 810 is also moved to the right (FIG. 7). reference). Thereby, the operation wire 750 is pulled, and the closing member 74 is rotated in the inner rotation direction (counterclockwise direction in FIG. 6).

  Further, for example, when the front wheel 8 is rotated with steering in the right direction, the operation member 81 is rotated, and the link member 53 is also moved in the left direction (see FIG. 8). As a result, the operation wire 750 is pulled, and the closing member 74 rotates in the inner rotation direction.

(Function)
The riding mower A2 operates as follows.
During the mowing operation, when the front wheel 8 is directed straight as shown in FIG. 6, the opening 101 in the vicinity of the front wheel 8 in the space 10 in which the front wheel 8 is arranged is narrowed by the front wheel 8 being covered. Therefore, it is prevented or reduced that mowing grass, dust, pebbles, etc. jump out of the vehicle body through the opening 101.

  During the mowing operation, if the steering direction is steered to the left as shown in FIG. 7, the front wheel 8 moves and the horizontal angle changes, and the rear side of the right front wheel 8 goes out of the space 10 outward. The opening 101 expands. Accordingly, the operation member 81 of the bearing 80 of the front wheel 8 is also rotated to pull the operation wire 750, and the closing member 74 is rotated counterclockwise in FIG. 6 to close the right front portion of the cutter cover 65.

  As a result, mowing grass, dirt or pebbles (see arrows in FIG. 7) blown by the cutter (not visible in the figure) are almost stopped so as not to jump out by the closing member 74 and the front wheel 8 on the right side. Can be prevented from being scattered. In addition, as shown by the arrows in FIG. 7, some of the objects hitting the front wheel 8 on the right side jump out to the outside of the vehicle body, but the direction changes obliquely rearward and the risk is reduced.

Further, when the traveling direction is steered to the right as shown in FIG. 8, the front wheel 8 moves and the horizontal angle changes, and the rear side of the right front wheel 8 enters the space 10. Along with this, the operation member 81 of the bearing 80 of the front wheel 8 also rotates to pull the operation wire 750, and the closing member 74 rotates counterclockwise in FIG. Block the right front of the.
Since the front wheel 8 and the closing member 74 move completely in synchronization and do not interfere with each other, the closing member 74 does not hinder the movement of the front wheel 8 (see FIGS. 7 and 8). .
As a result, cut grass, dirt, pebbles, etc., blown by the cutter are almost stopped by the closing member 74 and the right front wheel 8 as in the case of left turn steering, and can be prevented from being scattered outside the vehicle body.

FIG. 9 is a perspective view showing a third embodiment of the mower according to the present invention,
FIG. 10 is a plan view explanatory diagram when traveling straight, showing the steering device including the scattering prevention device for the mower shown in FIG.
11 is an explanatory view of the rear view of FIG.
FIG. 12 is a plan view explanatory view showing a state in which the left turn is steered from the state of FIG.
FIG. 13 is an explanatory diagram in plan view showing a state in which a right turn is steered from the state of FIG.
In the description of the present embodiment, the same parts as those in the riding mower A1 are denoted by the same reference numerals in the drawings, and the description of the structure is basically omitted.

In the riding mower A3, a scattering prevention device 7b is provided on the inner side of the right front wheel 8, which is the side on which more objects are blown by the rotation of the cutter. The scattering prevention device 7b can be provided inside the left front wheel 8 in addition to the right side. In the vicinity of the front wheel 8 in the space 10 in which the right front wheel 8 is disposed, an opening 101 is formed between the front wheel 8 and a chassis (not shown).
The scattering prevention device 7b has a substantially trapezoidal plate-like blocking member 76. The closing member 76 is attached to the king pin 77 so as to be rotatable in the axial circumferential direction so that substantially parallel side portions are arranged vertically. The closing member 76 is formed in such a size that the tip portion slightly protrudes outward from the outer peripheral portion of the right front wheel 8 when the direction is the same as that of the right front wheel 8.

  The closing member 76 is urged in an outward rotation direction (counterclockwise direction in FIG. 10) by an urging means (not shown) such as a spring, and a range in which the occluding member 76 can further rotate is set. That is, the closing member 76 is stopped by a stop mechanism (not shown) in a direction parallel to the direction of the right front wheel 8 during straight traveling.

  When the right front wheel 8 is steered to the right, the rear side of the right front wheel 8 directly pushes the closing member 76 in the inward rotation direction (clockwise in FIG. 10). It rotates with the front wheel 8. The closing member 76 can rotate together to the limit position where the right front wheel rotates. The height of the lower end of the closing member 76 is set to be slightly lower than the height of the lower end of the hanging plate 62 of the cutter cover 65.

(Function)
The riding mower A3 operates as follows.
During the mowing operation, when the front wheel 8 faces straight as shown in FIG. 10, the opening 101 near the front wheel 8 on the right side of the space 10 in which the front wheel 8 is arranged is covered with the right front wheel 8 and the closing member 76. Since it is narrowed by being peeled off, it is prevented or reduced that mowing grass, dirt, pebbles, etc. jump out of the vehicle body through the opening 101.

During the mowing operation, when the traveling direction is steered to the left as shown in FIG. 12, the front wheel 8 moves and the horizontal angle changes, and the rear side of the right front wheel 8 comes out of the space 10. Along with this, the opening 101 with the right front wheel 8 of the space 10 in which the right front wheel 8 is arranged expands. However, the closing member 76 does not follow the movement of the right front wheel 8 and does not follow the movement of the right front wheel 8. The vehicle stops in a direction parallel to the direction of the front wheel 8.
As a result, the opening 101 of the space 10 is almost blocked by the blocking member 76, and the cut grass, dust, pebbles, etc. (see the arrow in FIG. 12) blown by the cutter are almost stopped so as not to jump out by the blocking member 76. , It can be prevented from scattering out of the vehicle body.

  Further, when the vehicle is steered to the right as shown in FIG. 13, the rear side of the right front wheel 8 rotates in the inner rotation direction and enters the space 10, and the closing member 76 is pushed by the right front wheel 8. Similarly, it turns in the inner turning direction. Even in this state, the opening 101 of the space 10 is narrowly closed by the right front wheel 8 and the closing member 76, and grass, dirt, pebbles and the like are outside the vehicle body as in the case of the left turn steering. Can be prevented from being scattered.

  Each of the riding-type grass mowers A1, A2, A3 may be mounted on each of the riding-type grass mowers, or a combination of a plurality of them. Also good.

  Note that the terms and expressions used in the present specification are merely explanatory and not restrictive, and do not exclude terms and expressions equivalent to the above terms and expressions. The present invention is not limited to the illustrated embodiment, and various modifications can be made within the scope of the technical idea.

The perspective view which shows 1st Embodiment of the mower based on this invention. The perspective explanatory view at the time of the straight ahead showing the steering apparatus and cutter apparatus containing the scattering prevention apparatus of the mower shown in FIG. Plan view explanatory drawing at the time of going straight. Plan view explanatory drawing which shows the state which carried out the left turn steering from the state of FIG. The perspective view which shows 2nd Embodiment of the mower based on this invention. Plane view explanatory drawing at the time of rectilinear advance showing the steering apparatus and cutter apparatus containing the scattering prevention apparatus of the mower shown in FIG. FIG. 7 is a plan view explanatory diagram illustrating a state in which left-turn steering is performed from the state of FIG. 6. FIG. 7 is an explanatory plan view showing a state in which a right turn is steered from the state of FIG. 6. The perspective view which shows 3rd Embodiment of the mower based on this invention. Plane view explanatory drawing at the time of the straight ahead showing the steering device containing the scattering prevention apparatus of the mower shown in FIG. FIG. 11 is a rear view explanatory diagram of FIG. 10. Plan view explanatory drawing which shows the state which carried out the left turn steering from the state of FIG. Plane view explanatory drawing which shows the state which carried out the right turn steering from the state of FIG.

Explanation of symbols

A1 Riding lawn mower 1 Frame 2 Motor 3 Body 4 Seat 5 Steering device 50 Steering 51 Movable member 52 Connecting metal 53 Link member 54 Bar 59 Bellows 6 Cutter device 60 Drive system 61 Top plate 62 Drooping plate 63 Hanging curtain plate 65 Cutter cover DESCRIPTION OF SYMBOLS 7 Shatter prevention device 70 Closure member 70a Narrow part 70b Wide part 700 Edge 71 Support member 72 Link arm 73 Reinforcement metal fitting 8 Front wheel 10 Space 19 Chassis 100 Opening part 100a Opening part A2 Riding riding mower 7a Scatter prevention apparatus 74 Closure member 740 Shaft 741 Stopper 75 Wire insertion tube 750 Operation wire 751 Protection tube 78 Mounting tool 780, 781 Guide pulley 79 Mounting tool 790, 791 Guide pulley 80 Bearing 81 Operation member 810 Pin 101 Opening A3 Riding type mowing 7b scattering prevention device 76 the closing member 77 kingpin

Claims (5)

A steering device and a steering wheel that is moved by the operation of the steering device are provided at the front, and a cutter device that has a cutter that rotates horizontally and a cutter cover that covers the cutter is provided on the lower side of the vehicle body. Has a space that does not hinder the movement of the steered wheel between the steering device, and the cutter cover has hanging parts on both sides and the rear side, and does not have a hanging part on the front side where the grass enters. In the mower
The steering from the straight state, the opening between the vehicle body and the steering wheel, when the spread by the movement of the steering wheel with the steering, is moving closure member by movement of the steering or steering wheel, the spread opening Block or narrow the part,
A method of preventing scattering of objects caused by rotation of the cutter in a mower. A steering device and a steering wheel that is moved by the operation of the steering device are provided at the front, and a cutter device that has a cutter that rotates horizontally and a cutter cover that covers the cutter is provided on the lower side of the vehicle body. Has a space that does not hinder the movement of the steered wheel between the steering device, and the cutter cover has hanging parts on both sides and the rear side, and does not have a hanging part on the front side where the grass enters. A mower,
The mower includes a closing member that closes or narrows the expanded opening when the opening between the vehicle body and the steering wheel expands due to movement of the steered wheel accompanying the operation of the steering device. And
Movement of the steering device or the steering wheel is transmitted to the closing member directly or via a transmission mechanism.
Mower. A steering device and a steering wheel that is moved by the operation of the steering device are provided at the front, and a cutter device that has a cutter that rotates horizontally and a cutter cover that covers the cutter is provided on the lower side of the vehicle body. Has a space that does not hinder the movement of the steered wheel between the steering device, and the cutter cover has hanging parts on both sides and the rear side, and does not have a hanging part on the front side where the grass enters. A mower,
When the upper opening between the vehicle body and the steering wheel expands due to the movement of the steering wheel accompanying the operation of the steering device, the mower moves in the horizontal direction and closes the expanded opening. It has a closing member that narrows,
Movement of the steering device or the steering wheel is transmitted to the closing member directly or via a transmission mechanism.
Mower. A steering device and a steering wheel that is moved by the operation of the steering device are provided at the front, and a cutter device that has a cutter that rotates horizontally and a cutter cover that covers the cutter is provided on the lower side of the vehicle body. Has a space that does not hinder the movement of the steered wheel between the steering device, and the cutter cover has hanging parts on both sides and the rear side, and does not have a hanging part on the front side where the grass enters. A mower,
Wherein among the cutter cover surrounding the cutter, the opening between the side and the steering wheel to be those hits that blown by cutter, when spread by the movement of the steering wheel due to the operation of the steering device, moving in the horizontal direction A closing member for closing or narrowing the expanded opening;
Movement of the steering device or the steering wheel is transmitted to the closing member directly or via a transmission mechanism.
Mower. A steering device and a steering wheel that is moved by the operation of the steering device are provided at the front, and a cutter device that has a cutter that rotates horizontally and a cutter cover that covers the cutter is provided on the lower side of the vehicle body. Has a space that does not hinder the movement of the steered wheel between the steering device, and the cutter cover has hanging parts on both sides and the rear side, and does not have a hanging part on the front side where the grass enters. A mower,
When the rear side of the steering wheel is turned inward in accordance with the operation of the steering device, the steering wheel is pushed inward to move inward, and the steering wheel moves inward. When the rear side pivots outward, it moves following the steering wheel until it stops at the required angle, and the rear side of the steering wheel pivots outward to form an opening between the vehicle body and the steering wheel. And, at the stop position, a closing member that closes or narrows the opening,
Movement of the steering device or the steering wheel is transmitted to the closing member directly or via a transmission mechanism.
Mower.

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