JPH0458928B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a grass clippings discharging device for discharging grass clippings from a grass collecting container attached to a grass cutting machine.

(Prior art) A grass cutting machine has a structure in which a mower is attached to the lower part of the vehicle body, a grass collection container is attached to the rear of the vehicle body, and the grass clipped by the mower is guided and stored in the grass collection container through a duct. There is.

As a structure for discharging the grass clippings stored in the grass collection container, there are those that discharge the grass clippings by rotating the grass collection container itself, and those that discharge the grass clippings by operating the opening/closing door as shown in U.S. Patent No. 3,816,986. There is something to be discharged.

(Problem to be solved by the invention) However, in the case of a structure in which the grass clipping container itself is rotated to discharge the grass clippings, the center of gravity moves during discharge, making the balance of the grass clipping machine unstable. There are drawbacks to it.

In addition, as shown in U.S. Patent No. 3,816,986, in a structure in which the bottom door and rear door are opened to discharge grass clippings, the balance of the grass clipping machine body during discharge is relatively stable. However, since the structure is such that the bottom door is opened downward to discharge the grass to the bottom of the grass container, it is necessary to attach the grass container to the rear end of the vehicle so that it protrudes backwards, and the grass collector is The drawback was that the overall length was longer, leading to larger size.

SUMMARY OF THE INVENTION In view of the above-mentioned problems, it is an object of the present invention to stabilize the balance of the main body of a grass cutter when discharging grass clippings, and to provide a simple discharge operation structure.

Furthermore, the purpose is to make the grass cutting machine more compact.

(Means for solving the problem) The technical means is that the lower mower 3 of the vehicle body 6 is attached, the grass collection container 4 is attached above the rear wheel 32 provided on the vehicle body 6, and the mower 3 is attached to the lower part of the vehicle body 6. 3 guides and stores cut grass into the grass collection container 4 via the duct 51, and the grass collection container 4 includes:
Top wall board 61, bottom wall board 62, front wall board 54, rear wall board 6
The upper part of the front wall plate 54 is rotatably supported around an axis in the left and right direction, and the lower end of the front wall plate 54 and the bottom wall The front end of the plate 62 is hinge-coupled 71 so as to be relatively rotatable around the axis in the left and right direction, and the bottom wall plate 62 is rotated rearwardly in a descending manner by rearward rotation around the upper pivot point of the front wall plate 54. The front wall plate 54
and the bottom wall plate 62 are flush with each other to form a descending inclined discharge surface 90, and the grass clippings stored along the inclined discharge surface 90 can be freely discharged to the rear of the rear wheels 32. A vertical guide portion 7 is provided on the front side of the plate 54.
6 is provided, the lower end of which is fixed to a rotation shaft 77 provided on the front side of the grass collection container and having a rotation axis in the left-right direction, and the upper end of which is engaged with the guide portion 76, and A push arm 80 is provided to rotate the front wall plate 54 backward by relative movement downward along the guide portion 76, and an operating lever for rotating the rotation shaft 77 is provided on one side of the grass collecting container 4. 82 is provided.

(Function) According to the present invention, when discharging the grass clippings stored in the grass collecting container 4, by rotating the operating lever 82 in a predetermined direction, the rotating shaft 77 and the pushing arm 8
0 are rotated together.

By this rotation of the push arm 80, the upper end portion of the push arm 80 is relatively moved downward along the guide portion 76, and this relative movement causes the front wall plate 54 to rotate around the upper pivot portion. As the bottom wall plate 62 is rotated backward, the bottom wall plate 62 is pushed backward in a backward downward direction, and the front wall plate 54 and the bottom wall plate 62 form a backward downward inclined discharge surface 90 in which they are flush with each other. The grass clippings are smoothly discharged while sliding along the slope of the inclined discharge surface 90.

At this time, simply by moving the front wall plate 54 and the bottom wall plate 62 rearward, it is possible to prevent the overall balance from being lost, and to ensure the stability of the balance of the main body of the mower 1.

Furthermore, since the bottom wall plate 62 is pushed rearward to form the inclined discharge surface 90 projecting rearward, the grass collection container 4 can be satisfactorily installed above the rear wheel 32.

(Embodiment) Hereinafter, embodiments of the present invention will be described based on the drawings. In Figs.
and a grass collection container 4.

First, the running wheels 2 will be described. Reference numeral 6 denotes a vehicle body, which is composed of a frame 7, an engine 8, a transmission 9, etc. provided in the frame 7.

The frame 7 includes a frame body 10 framed in a substantially rectangular parallelepiped shape, a step support member 11 protruding forward from the frame body 10, and a grass container support member 1 protruding rearward from the frame body 10.
It consists of 2. The step support member 11 is equipped with a step 13 and a steering handle device 14, and the grass collection container 4 is mounted on the grass collection container support member 12.

The engine 8 is provided within the frame body 10,
A crankshaft 16 projects forward.

The transmission 9 is arranged in parallel on the right side of the engine 8, supported by the frame body 10, and has an HST (hydrostatic transmission) 17 and a gear transmission 18 arranged in parallel in the front and rear.

A pump shaft 19 of the HST 17 is interlocked with a crankshaft 16 of an engine 8 via a belt transmission mechanism 20, and a motor shaft 21 thereof and a gear transmission 1.
It is linked with 8.

A front wheel drive shaft and a rear wheel drive shaft 23 are protruded from the gear transmission device 18 at the front and the rear, respectively, and the front wheel drive shaft is interlocked and connected to a front wheel differential device 24, and via a front axle 25, Front wheels 26 are driven.

The front wheel differential device 24 is provided at the front end of the frame body 10 and is offset to the right side, and a PTO shaft 27 in the front-rear direction is provided at a corner of the differential device 24.
is supported through the PTO shaft 27, and the rear part of the PTO shaft 27 is interlocked and connected to the crankshaft 16 via a belt transmission mechanism 28.

On the other hand, the rear wheel drive shaft 23 is interlocked with a rear wheel gear device 29 via a transmission mechanism 30, and a rear wheel 32 is driven via a rear axle 31. Rear wheel gear system 2
9 is supported by a grass collection container support member 12, and the rear wheels 32 are steered by a hydraulic cylinder 33.

34 is a seat.

The front mount mower 3 is attached to the frame 7 via a pair of left and right connecting links 36, a hanging device 37, and a lift cylinder 38, so that it can be raised and lowered, and can be attached and detached, and is located in front of the front wheels 26.

The mower 3 has two vertical shafts 40 on the mower deck 39.
A disk 41 is attached to the lower end of each vertical shaft 40, and the cutter 42 is attached to the pivot 43 on this disk 41.
The disc 41 is pivotably supported via the disc 41.
The rotation of the blade causes the cutters 42 to protrude in the radial direction due to centrifugal force, thereby cutting the grass.

A gear transmission 44 is provided between the upper parts of each vertical shaft 40, and an input shaft 45 of the gear transmission 44 and
PTO shaft 27 and universal joint shaft 46
are linked together.

A plurality of wind blowing blades 47 are provided on the upper surface of each disk 41, and constitute a blower that sends grass clippings to a grass clippings discharge port 48 provided approximately at the center of the back wall of the mower deck 39.

A pair of ground wheels 4 on the left and right are installed at the front and rear of the mower 3, respectively.
9 and a limit gauge wheel 50 are provided.

Reference numeral 51 denotes a duct for guiding and storing the grass clippings cut by the mower 3 into the grass collection container 4, the front end of which is connected to the grass clippings discharge port 48 via a flexible hose 52, and the rear end connected to the front wall of the grass collection container 4. It is connected to an opening 55 formed in the upper left part of the plate 54 in a fit-in manner.

That is, the duct 51 passes below the front axle 25 between the left and right front wheels 26 from the grass clippings outlet 48, and passes between the front wheels 26.
It protrudes to the side of the vehicle body 6 at the rear of the container 6, rises upward from there, and is connected to the grass collecting container 4. At this time, since the front wheel differential device 24 is offset to one side, a good space for installing the duct 51 can be secured, and by passing between the front wheel differential device 24 and the front wheels 26, sufficient ground clearance can be ensured. can.

Further, the duct 51 is attached and supported to the side of the frame body 10 by a band body 56 that holds the duct 51 at a midway portion. Furthermore, an internal see-through window 57 is removably attached to one side of the upper side of the duct 51, so that clogging or the like in the duct 51 can be visually confirmed.

In addition, the upper half of the duct 51 is a transparent duct,
It may be configured to be detachably connected to the lower half.

As shown in FIGS. 1 to 12, the grass collecting container 4 is located above the rear wheel 32.
It is mounted on the support member 12 in a mounting manner. That is, the frame 59 is formed into a rectangular parallelepiped shape, and the lower end of the frame 59 is bolted to the support member 12 .

In addition, the grass collection container 4 has the front wall plate 54 and the rear wall plate 6.
0, top wall board 61, bottom wall board 62, and left and right side wall boards 6
The left and right side wall plates 63, 63 are fixed to the inside of the frame 59 by welding or the like.

The upper part of the front wall plate 54 is rotatably supported on the frame frame 59 side via a bracket body 64 about an axis in the left and right direction, and as shown by the imaginary line in FIG. It is said that it can be rotated backwards and forwards.

Note that the front wall plate 54 is formed to be slightly narrower than the width between the left and right side wall plates 63, 63,
It is rotated backward between 63 and 63. Also, the bracket body 64
A plurality of are provided in the left and right direction.

Similarly, the upper part of the rear wall plate 60 is pivotally supported on the frame 59 side via a bracket body 65 so as to be freely rotatable about the axis in the left and right direction. Further, the front wall plate 54 and the rear wall plate 60 are as shown in FIGS. 1 and 8.
The left and right sides are connected by link rods 66, respectively. That is, the link rod 66 is connected across the bracket body 67 on the rear surface of the front wall plate 54 and the mounting pin 68 protruding from the rear wall plate 60, and as the front wall plate 54 rotates backward, the rear wall plate 60 is also linked to rotate backward.

Note that the rear wall plate 60 is formed to be slightly wider than the space between the left and right side wall plates 63, 63, and both ends abut against the frame frame 59. Further, a plurality of bracket bodies 65 are provided in the left and right direction.

A net 69 made of punching metal or the like is fixed to the upper surface of the frame 59.
An upper wall plate 61 is fixed to the upper surface side of the frame frame 59 by welding or the like with a gap between the upper wall plate 61 and the upper wall plate 61 . In addition, the rear end side has a gap between the frame frame 59 and the air circulation gap, and the grass clippings fed from the duct 51 with the air flow are dropped downward, and the air passes through the net 69 and passes through the upper wall plate. It is discharged rearward through the gap between the rear end of the frame 61 and the frame frame 59. Reference numeral 70 denotes a plurality of support rods provided in the left and right direction, which connect and fix the frame frame 59 and the upper wall plate 61 to each other.

The bottom wall plate 62 is formed to be slightly narrower than the space between the left and right side wall plates 63, and the front end portion is formed to be slightly narrower than the width between the left and right side wall plates 63.
The hinge connection 71 has a hinge structure that is rotatable relative to the lower end of the holder and about the axis in the left and right directions. As shown in FIG. 1, the bottom wall plate 62 is usually
It is supported in a mounted manner on the front and rear frame frames 59. Further, at the rear end portions of the left and right support members 12, first
As shown in Figures 2, 5 and 6,
A roller body 72 is provided to be able to freely roll around an axis in the left and right direction, and a bottom wall plate 62 is mounted on the roller body 72.
is placed.

Then, as the front wall plate 54 rotates backward, the bottom wall plate 62 is pushed rearward on the roller body 72 in a backward downward direction.

In the present invention, the reinforcing member 73 made of square pipe material in the front-rear direction on the lower surface of the bottom wall plate 62 is configured to move relative to each other on the roller body 72.

In addition, the front wall plate 54, the rear wall plate 60, and the bottom wall plate 62
is appropriately reinforced with reinforcing material made of square pipe material.

As shown in FIG. 10, the opening 55 of the front wall plate 54 may be provided with a sealing material 74 as appropriate. Further, as shown in FIGS. 1 and 11, a guide groove 76 serving as a guide portion in the vertical direction is formed in the center portion of the front side of the front wall plate 54 in the left-right direction. On the other hand, a rotation shaft 77 is provided on the front side of the grass collecting container 4 and has a rotation axis in the left and right direction, and one end of the rotation shaft 77 is attached to a bracket body 78 fixed to the front side of the frame frame 59. A bracket body 7 is pivotally supported and the other end is fixed to the rear side of the frame body 10.
It is pivoted on 9.

Reference numeral 80 denotes a pushing arm, the lower end of which is fitted onto the rotating shaft 77 and fixed to the rotating shaft 77 so as not to be relatively rotatable, and the upper end of which a pair of left and right roller bodies 81 are rotatably supported. The roller body 81 is engaged with the guide groove 76 so as to be relatively movable in the vertical direction.

Reference numeral 82 denotes an operating lever, which is disposed on one side of the grass collection container 4, and its front end is fitted onto the outer end of the rotating shaft 77 and is fixed with a roll pin or the like so that it cannot rotate relative to it.

Reference numeral 83 denotes a guide plate, which is fixed to the side wall plate 63 and the frame frame 59 in an outwardly projecting manner, and has a vertically elongated guide hole 84 as shown in FIG.
is formed. The operating lever 82 is inserted through the guide hole 84 and can be rotated along the guide hole 84 . The upper and lower ends of the guide hole 84 are large-diameter holes, and are formed into an upper lock portion 85 and a lower lock portion 86. A conical cylindrical lock body 87 is fitted onto the operating lever 82 so as to be relatively movable in the longitudinal direction, and a biasing spring 89 made of a coil spring is fitted between the operating lever 82 and a spring receiving plate 88 which is appropriately fixed. is installed on. As shown in FIG. 5, the lock body 87 is removably fitted into and locked into the upper lock part 85 and lower lock part 86 of the guide hole 84.

As shown in FIG. 5, the operating lever 82
When the lock body 87 is in the upper position, the lock body 87 is fitted into the upper lock portion 85 and the operating lever 82 cannot be rotated. Next, when rotating the operating lever 82 downward, the lock body 87 is separated from the upper lock part 85 against the urging force of the urging spring 89, and in this state, the operating lever 82 is rotated downward. All you have to do is rotate it. When the operating lever 82 is located at the lower lock portion 86, the lock body 87 is pushed by the urging force of the urging spring 89, and the lock body 87 is automatically fitted into the lower lock portion 86 and locked. be done. Further, when rotating the operating lever 82 upward, the operation may be performed in the same manner as described above.

By the downward rotation of the operating lever 82, the push arm 80 is rotated as shown by the imaginary line in FIG. 1, and the roller body 81 is relatively moved downward within the guide groove 76. Due to this relative movement, the front wall plate 54 is rotated rearward about the upper pivot point,
The bottom wall plate 62 is pushed backward in a backward downward direction. When the operating lever 82 is located at the lower lock portion 86, the front wall plate 54 and the bottom wall plate 62 are flush with each other, forming a downwardly inclined discharge surface 90, as shown by the imaginary line. The grass clippings stored in the grass collection container 4 are discharged along this inclined discharge surface 90 in a falling manner. At this time, the front wall plate 54 and the bottom wall plate 62 form a straight line and protrude significantly rearward, so that the rear wheel 3
This allows the grass clippings to be smoothly discharged to the rear of the 2.

If the operating lever 82 is returned to the upper lock portion 85, the initial state is restored.

A front wheel fender 92 covers the upper part of the front wheel 26, and a floor sheet 93 is fixed between both fenders 92.

In this embodiment, the mower 3 is installed at the front of the mower 1, but the mower 3 may be installed at the center.

(Effects of the Invention) According to the present invention, a mower is attached to the lower part of the vehicle body, a grass collection container is attached above the rear wheels provided on the vehicle body, and the grass cut by the mower is collected through a duct. In the grass collection container that is guided and stored in the grass collection container, the grass collection container is formed into a hexahedral box shape consisting of a top wall plate, a bottom wall plate, a front wall plate, a rear wall plate, and left and right side wall plates, and the front wall plate The upper part of the front wall plate is pivotally supported to be rotatable about the left-right axis, and the lower end of the front wall plate and the front end of the bottom wall plate are hinged to be relatively rotatable about the left-right axis. By the rearward rotation around the upper pivot of the front wall plate, the bottom wall plate is pushed backward in a backward downward direction, and the front wall plate and the bottom wall plate become flush with each other, resulting in downward inclined discharge. A vertical guide section is provided on the front side of the front wall plate, and a vertical guide section is provided on the front side of the front wall board, and the grass clippings stored along the inclined discharge surface can be freely discharged behind the rear wheels. The lower end portion is fixed to a rotation shaft having a rotation axis in the left and right direction, and the upper end portion is engaged with the guide portion, and the front wall plate is moved by relative movement downward along the guide portion. The push arm for rotating the grass to the rear is provided, and an operating lever for operating the rotating shaft is provided on one side of the grass collection container, so that when the grass clippings stored in the grass collection container are discharged, It is possible to prevent the balance of the grass cutting machine body from becoming unbalanced, and the balance can be stabilized. Further, the discharge operation can be easily performed by rotating the operating lever. Furthermore, the structure is such that the bottom wall plate is pushed rearward to form a rearwardly projecting inclined discharge surface, which allows the grass collecting container to be conveniently mounted above the rear wheels, thereby making it more compact.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a sectional side view of the main part, FIG. 2 is an overall side view, FIG. 3 is a plan view of the same, FIG. 4 is a sectional front view, and FIG. 5 is a grass collection. FIG. 6 is a side view of the container, FIG. 6 is a rear view, FIG. 7 is a plan view, FIG. 8 is a partially sectional plan view of the grass collection container, FIG. 9 is a rear view of the hinge joint, and FIG. FIG. 11 is a cross-sectional view of the rear end of the duct, FIG. 11 is a cross-sectional plan view of the grass clippings discharge operation section, and FIG. 12 is a rear view of the guide plate portion. 1... Grass cutting machine, 3... Front mount mower, 4... Grass collecting container, 6... Vehicle body, 32... Rear wheel, 51... Duct, 54... Front wall plate, 60...
Rear wall plate, 61...Top wall plate, 62...Bottom wall plate, 63
... Side wall plate, 71 ... Hinge connection, 76 ... Guide groove, 77 ... Rotating shaft, 80 ... Pushing arm, 82
...Operation lever, 90...Slanted discharge surface.

Claims (1)

[Claims] 1 The mower 3 is attached to the lower part of the car body 6,
A grass collecting container 4 is mounted above a rear wheel 32 provided in the mower 3, and grass clippings cut by the mower 3 are guided and stored in the grass collecting container 4 via a duct 51. 4 is formed into a hexahedral box shape consisting of a top wall plate 61, a bottom wall plate 62, a front wall plate 54, a rear wall plate 60, and left and right side wall plates 63, and the upper part of the front wall plate 54 is arranged around the axis in the left and right direction. The lower end of the front wall plate 54 and the bottom wall plate 6
The front end of the front wall plate 54 is hinged 71 so as to be relatively rotatable around the axis in the left and right direction, and the bottom wall plate 62 is moved rearwardly downward by rearward rotation about the upper pivot point of the front wall plate 54. The front wall plate 54 and the bottom wall plate 62 are pushed to form a rear descending inclined discharge surface 90 where they are flush with each other, and the grass clippings stored along the inclined discharge surface 90 are pushed to the rear of the rear wheels 32. The front wall plate 54 can be freely discharged.
A vertical guide part 76 is provided on the front side of the grass collection container 4, and the lower end is fixed to a rotation shaft 77 provided on the front side of the grass collection container 4 and has a rotation axis in the left and right direction, and the upper end is A push arm 80 is provided which is engaged with the guide portion 76 and rotates the front wall plate 54 backward by relative movement downward along the guide portion 76, and rotates to one side of the grass collecting container 4. A grass clippings discharge device for a grass cutter and grass collector, characterized in that an operating lever 82 for rotating a moving shaft 77 is provided.