JPH052050Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a grass clippings discharging device for a mower that constitutes a grass clippings collector.

(Prior art) A grass clipping machine is equipped with a front or mid-mounted mower and a grass collection container on a moving vehicle such as a tractor, and the grass clippings cut by the mower are discharged through a grass clippings discharging device provided on one side of the mower. The plant is configured to discharge into a grass collection container.

The grass clippings discharging device employs a centrifugal blower type having rotating blades in a blow-up casing, and the wind generated by the rotation of the blade members blows up the grass clippings sent from the mower and blows up the duct. The grass is fed to the grass collection container through the container.

FIG. 6 shows an example of the prior art, in which a grass clipping outlet 12, which is oblong in side view and rectangular in shape when viewed from the side, is formed on one side of a mower deck 7 that supports a cutter so as to be rotatable about a vertical axis. A vacuum plate 13 is provided which substantially follows the rotation locus of the cutter, and a blow-up casing 15' is provided so that its lower part communicates with the grass clippings discharge port 12. It is located forward of the bent portion 13a of the vacuum plate 13 forming the vacuum plate 13. In addition, blow-up casing 1
A blade member 16 is rotatably provided within 5' via a horizontal shaft 17.

(Problem to be Solved by the Invention) When the blade member 16 rotates, it acts to suck the wind from the cut grass discharge port 12 into the blow-up casing 15'. is being pushed forward, blowing up casing 1
If the communication area between the rear part of the blade 5' and the grass clippings discharge port 12 is large, the pushing wind enters the grass clippings discharge port 12 side and collides with the grass-containing wind sent by the cutter.
Turbulence may occur in the wind containing grass clippings, or blow-up casing 1
This may obstruct suction into the interior of the mower 5', causing residual grass to be collected or dust blowing out in front of the mower deck.

By the way, when mowing the lawn, etc., the grass clippings are sometimes left in the field without being collected, so the grass clippings discharge port 12 of the mower has a horizontally long rectangular shape when viewed from the side and has a large area. Instead, a release cover is provided that only guides the release of grass. Therefore, forming the bottom of the grass clippings outlet 12 in an arc shape along the rotation locus of the blade member means that
This is not adopted because it reduces the grass cutting ability, and if the blow-up casing 15' is attached, the rear lower part of the grass clippings discharge port 12 protrudes far beyond the rotation locus of the blade member, resulting in the above-mentioned problem. It is said that it is difficult to solve this problem.

Furthermore, when the blow-up casing 15' touches the ground, the height of the mower changes and the grass cutting height becomes uneven, so the bottom of the blow-up casing 15' is set at approximately the same height as the bottom of the mower deck, It is difficult to make it lower than the bottom wall.

(Means for solving the problem) The present invention is based on the installation port 2 of the blow-up casing 15.
By forming a partition portion 24 at the boundary between the blade member 16 and the circular portion 19 to prevent the wind generated by the blade member 16 from flowing into the mower deck 7 side, the problems of the prior art described above can be solved. This is what I did.

That is, the specific configuration of the problem solving means in the present invention is that a cutter 10 is supported on a mower deck 7 so as to be rotatable around a vertical axis, and a grass clippings outlet 12 having a horizontally long rectangular shape in side view is formed on one side of the mower deck 7. The attachment port 20 of the blow-up casing 15 that communicates with the cut-grass discharge port 12 is removably fitted, and the blade member 16 for blowing up the cut grass is rotatably disposed within the circular portion 19 of the blow-up casing 15. In the mower grass clipping discharge device in which the bottom of the circular part 19 is approximately at the same height as the bottom of the mower deck 7, the attachment opening part 20 of the blow-up casing 15 has a blade member at the boundary with the circular part 19. Partition part 2 that prevents water from flowing into the mower deck 7 side
4 is formed in a rising shape from the lower part of the blow-up casing, and the upper edge 24a of this partition part 24 is formed in an arc shape that approximately follows the rotation locus of the outer end of the blade member 16. Upper edge 24a from the side
A sloped portion 20a is formed which slopes upward to a point where the grass clippings smoothly pass over the upper edge 24a.

(Function) The grass clipped by the cutter 10 of the mower 3 flows toward the grass clippings discharge port 12 on one side of the mower deck 7 on the wind generated by the wind raising part 11. This discharged grass clippings are sent to the blow-up casing 1 fixed to the mower deck 7.
5 and is blown up by the rotation of the blade member 16 and fed to the grass collecting container 4. In the blow-up casing 15 , grass clippings are sucked into the circular portion 19 from the suction port 25 at the boundary between the circular portion 19 and the attachment port 20 by the rotation of the blade member 16 . When the blade member 16 that has performed the suction action makes one rotation and returns directly below the horizontal shaft 17, it generates wind in the opposite direction to the suction, but the wind flows into the partition portion 24 rising from below at the suction port 25. Therefore, the suction air is prevented from flowing toward the attachment port 20 side, that is, the grass clippings discharge port 12 side, and the normal flow of the suction air is ensured. A grass clippings discharge port 12 is provided in the attachment port 20.
An upwardly inclined slope 20a is formed from the side to the upper edge 24a of the partition 24, and the grass clippings are
I am trying to smoothly pass 4a.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

In FIG. 5, the grass cutting machine 1 is a tractor 2.
, a mid-mounted mower 3 attached to the lower abdomen of the tractor so as to be able to rise and fall freely, a grass collection container 4 attached to the rear of the tractor 2, and a grass clippings discharge device that feeds the grass clippings from the mower 3 to the grass collection container 4. 5.

1 to 4, the mower 3 has a mower deck 7 formed in a box shape with an open bottom and one side, and a gear case 8 to which power is transmitted from the tractor is provided at the center of the upper surface of the mower deck 7. Just below it and on the left and right, Moadetsuki 7
The structure is such that power is transmitted to three vertical shafts 9 supported by the . A strip-shaped cutter 10 is provided at the lower part of the three vertical shafts 9, and this cutter 1
0 is formed with a blade portion and an air blowing portion 11.

On one side of the mower deck 7, there is a ceiling wall 7a and a front wall 7.
A grass clippings discharge port 12 is formed with a horizontally oblong rectangular shape in side view and is formed by the back wall 7c and the mower deck 7.
A releasing cover for setting the releasing direction of the grass clippings released from the grass clippings discharge port 12 is provided on one side of the blade.

Reference numeral 13 denotes a vacuum plate disposed behind the three cutters 10, which has an arcuate surface substantially along the rotation locus of each cutter 10, and guides the wind generated by the wind blower 11.

In the grass clippings discharge device 5, a blow-up casing 15 is fixed to one side of the mower deck 7, and within the blow-up casing 15, a blade member 16 having a plurality of blade portions is rotatably supported via a horizontal shaft 17. Power is transmitted to this horizontal shaft 17 from the gear case 8 via a transmission mechanism 18.

The blow-up casing 15 has an attachment port 20 integrally formed at the bottom of one side of a circular portion 19 that covers the blade member 16, and a discharge port 21 is integrally formed at the top of the circular portion 19, and this discharge port 21 is connected to the duct. It is connected to the grass collecting container 4 via 22.

The attachment opening portion 20 has an oblong rectangular shape when viewed from the side, and is removably fitted into the grass clippings discharge port 12 of the mower deck 7, and can be detachably attached to the mower deck 7 with bolts or the like using the opening cover attachment hole 23. It is installed. The attachment port 20 faces approximately the lower half of the circular portion 19, communicates with the inside of the circular portion 19, and has substantially the same function as the grass clippings discharge port 12, so that the grass clippings can be removed from the attachment port. 20 and is sucked into the circular part 19. The bottom wall 1 of this circular part 19
Outside air introduction hole 19 is provided in 9a to prevent grass from attaching.
A large number of b are drilled.

At the boundary between the circular part 19 and the mounting opening part 20,
The partition portion 24 is integrally formed in a rising shape. This partition part 24 is formed by slanting the side part of the bottom wall of the mounting opening part 20 obliquely upward to above the bottom wall 19a of the circular part 19, and connecting the slope part 20a to the side wall of the circular part 19. , upper edge 24a of the partition portion 24
is in the shape of a circular arc extending close to the rotation locus of the outer end of the blade member 16, and together with the upper wall of the attachment port 20 forms the suction port 25 of the blow-up casing 15.

That is, the partition portion 24 provided on the bottom wall of the mounting port portion 20
stands up from the bottom wall 19a of the circular portion 19,
It has an arc-shaped upper edge 24a and an upwardly inclined inclined part 20a from the grass clippings outlet 12 to the upper edge 24a. It is designed to block wind flow from the ground. This partition part 24
In the figure, it is sufficient that the blade member 1 is formed from the rear part of the blow-up casing 15 to below the horizontal shaft 17.
The front side from the bottom of the horizontal shaft 17, which is the side that sucks the wind from the mounting opening 20 side by rotation of the part 6, is a partition part 24.
There is no problem even if there is no one. Further, the partition portion 24 may be located outside the rotation locus of the blade member 16, but it is preferable to overlap the partition portion 24 as shown in FIG. 2, since the partitioning effect of the wind is higher and the suction force is also increased.

In FIGS. 1, 2, and 4, the bent portion 13a on one side of the vacuum plate 13 is arranged in front of the back wall 20b of the mounting port 20, and guides the flow of air to the intake port 25. This prevents weeds from forming at the joint between the mower deck 7 and the blow-up casing 15.

That is, in the centrifugal blower type grass clipping discharge device, the suction force at the rear half of the suction port 25 is weak, so the bent portion 1
If 3a is on the rear side of the attachment opening 20 and there is a step at the joint, the flow of air will be disturbed and grass will be left behind. Therefore, the above problem is solved by extending the vacuum plate 13 to the front and positioning the bent portion 13a in front of the back wall 20b of the mounting opening portion 20.

In FIG. 1, the transmission mechanism 18 includes a transmission case 27 provided on the gear case 8, and a bearing case 29 that supports the rotating shaft 28 on the blow-up casing 15.
is fixed, the rotating shaft 28 is connected to a moving shaft 30 via a universal joint 31, and the rotating shaft 28 and the horizontal shaft 17 are interlocked and connected by a belt transmission means 32.

(Effects of the invention) According to the invention described in detail above, in order to efficiently discharge grass clippings, the mower deck 7, which is formed in a horizontally long rectangular shape when viewed from the side, is connected to the circular part of the blow-up casing 15 whose bottom is approximately the same height as the mower deck 7. Even if the structure is such that grass clippings are sucked into the grass cuttings 19, the attachment opening 20 of the blow-up casing 15, which is removably fitted into the grass clippings discharge port 12 of the mower deck 7, has a boundary portion with the circular portion 19 where the blade member 16 is arranged. Since the partition part 24 is formed in a rising shape, the wind generated by the blade member can be
The attachment opening 20 has an arc-shaped upper edge 24a that runs close to the rotation locus of the outer end of the blade member 16, and an upper edge 24a that extends from the grass discharge port 12 side. Since the sloped portion 20a is formed to slope upward to the upper edge 24a, the sloped portion 20
The upper edge 24a of the grass clippings can be smoothly crossed by using the upper edge 24a.
4a allows the grass clippings to flow smoothly from the rectangular grass clippings outlet 12 to the circular portion 19 having a different shape, and these sloped portions 20a and upper edge 24a allow the grass clippings to flow smoothly from the large area grass clippings discharge port 12 side to the circular portion 19. It becomes possible to blow grass clippings into the grass 19 without giving much blowing resistance.

[Brief explanation of the drawing]

Figures 1 to 5 show an embodiment of the present invention. Figure 1 is a cross-sectional plan view of the blow-up casing attached to a mower deck, Figure 2 is a side view of the blow-up casing, and Figure 3 is a rear view of the blow-up casing. , Figure 4 is the same plan view, Figure 5
The figure is a right side view of the entire grass cutting machine, and FIG. 6 is a cross-sectional plan view showing the prior art. 1... Grass cutting machine, 2... Tractor, 3... Mower, 4... Grass collection container, 5... Grass cuttings discharge device, 7
... Moor Deck, 12... Grass cut outlet, 15...
...Blow-up casing, 16...Blade member, 19...
...Circular part, 20...Mounting opening part, 24...Partition part,
24a...upper edge, 25...intake port.

Claims (1)

[Claims for Utility Model Registration] A cutter 10 is supported on a mower deck 7 so as to be rotatable around a vertical axis, and a cut grass outlet 12 is formed on one side of the mower deck 7 in the shape of a horizontally long rectangle in side view. The attachment opening 20 of the blow-up casing 15 that communicates with the blow-up casing 15 is removably fitted into the blow-up casing 15, and the blade member 16 for blowing up grass clippings is rotatably arranged in the circular portion 19 of the blow-up casing 15. In a mower grass clipping discharge device whose bottom is approximately at the same height as the bottom of the mower deck 7, the attachment opening portion 20 of the blow-up casing 15 has a boundary portion with the circular portion 19 where wind generated by the blade member flows into the mower deck 7 side. Partition part 2 that prevents
4 is formed in a rising shape from the lower part of the blow-up casing, and the upper edge 24a of this partition part 24 is formed in an arc shape that approximately follows the rotation locus of the outer end of the blade member 16. Upper edge 24a from the side
A grass clippings discharging device for a mower, characterized in that a sloped portion 20a is formed so as to slope upward to a point 20a to smoothly pass over an upper edge 24a of the grass clippings.