JPH0446515Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention is configured to supply cut grass to a grass collection container via a duct by conveying air from a mower, and also to The present invention relates to a grass collection container structure for a lawn mower, in which an inlet is disposed near the opening of the grass collection container, and an exhaust port is provided for discharging the conveying air flowing in from the duct to the outside of the container.

[Conventional technology]

Conventionally, in the grass collection container structure of the lawn mower, a part of the grass collection container is configured in a mesh or perforated plate shape to allow ventilation, and an exhaust port is formed to direct the conveying air flowing in from the duct to the outside of the container. At the same time, an air volume sensor detects the volume of the exhaust air discharged from the container, and when the exhaust port is blocked by grass clippings, the wind speed of the exhaust air decreases, causing grass clippings to be collected. There was one that was configured to detect the full state.

[The problem that the idea attempts to solve]

However, with the structure of the exhaust port as described above, in order to smoothly discharge the conveying air from the mower to the outside of the container through the duct, the exhaust port has a relatively large passage cross-sectional area. When using this configuration, depending on the strength of the conveying wind from the mower, the speed of the wind exiting the exhaust port during lawn mowing work and when the exhaust port is blocked by cut grass. The difference between the wind speed leaving the exhaust port and the wind speed may be relatively small, and the air volume sensor indicates that the exhaust port is blocked by grass clippings, that is, the grass collection container is full of grass clippings. There were cases where it was not possible to accurately detect the

The present invention aims to solve the above-mentioned problems.

[Means to solve the problem]

The feature of the present invention is that in the structure of the grass collection container for the lawn mower described at the beginning, at a position away from the inlet, the exhaust air is guided from the bottom side of the grass collection container toward the opening side to be directed outward. A wind exhaust pipe is provided for discharging the grass, an exhaust inlet of the wind exhaust pipe is configured to be freely changeable in the distance direction with respect to the bottom of the grass collection container, and the wind exhaust pipe is equipped with an air volume sensor. The functions and effects are as follows.

[Effect]

The conveying wind that flows through the duct to convey the grass clippings is discharged to the outside of the container via the wind exhaust pipe, which discharges air from the bottom of the grass collection container toward the opening. Since the grass is provided to guide the container, the grass clippings are packed sequentially from the bottom of the container by the conveying wind.
When grass clippings accumulate until they block the exhaust inlet of the exhaust pipe,
The inlet is blocked and the wind speed passing through the exhaust pipe decreases, making it possible to detect when the pipe is full. By providing the air exhaust passage in a cylindrical shape and reducing the cross-sectional area in this way, the wind speed of the exhaust air can be made sufficiently high, and the difference from the wind speed when it is blocked by grass clippings becomes large. Moreover, when collecting grass clippings with good ventilation, by placing the exhaust inlet closer to the bottom side, the wind speed can be reliably reduced when the tank is full.
In addition, in the case of cut grass that does not have good ventilation, by separating the inlet from the bottom, it is possible to prevent the exhaust inlet from becoming clogged before it becomes full.

[Effect of idea]

Therefore, by rationally improving the structure, it has become possible to reliably detect when the grass collection container is full of grass clippings, regardless of differences in the properties of the grass clippings.

〔Example〕

Hereinafter, embodiments of the present invention will be described based on the drawings.

As shown in FIG. 2, an engine 3 is provided at the front of the aircraft supported by front wheels 1 and rear wheels 2, and a control unit 4 is provided at the center of the aircraft. The riding type lawn mower is constructed so that the cut grass is sent through a duct 6 to a grass collection container 7 at the rear of the machine body.

The power from the engine 3 is transmitted from an electromagnetic clutch 8 to a transmission case 10 of the rear wheel 2 via a split-pulley continuously variable transmission 9, and is also transmitted to an input pulley 5a of a mower 5 by a belt. .

As shown in FIG. 1, the grass collector body 7 includes a grass collector main body 12 partitioned into left and right storage spaces by a partition plate 12a, and an upper part that removably covers the upper opening of the grass collector main body 12. The upper hood 11 is connected to the duct 6 from the mower 5 through an inlet 18 formed on the front side of the upper hood 11. The grass clippings sent by the conveying wind from the mower 5 are transported to the upper hood 11.
The cut grass is fed to the rear end side of the grass catcher main body 12, that is, to the lower bottom part of the grass catcher main body 12 through feeding paths 13, 13 formed therein.

The upper hood 11 has an air exhaust inlet 14 at its lower end at a position away from the inlet 18, and guides the air from the bottom side of the grass collecting container toward the opening side to the outside. A wind exhaust pipe 15 for discharging air is provided vertically through the pipe.
A propeller type air volume sensor 16 is attached to the outlet of the air conditioner. The conveying air from the mower 5 supplied through the duct 6 passes through the inside of this exhaust pipe 15 and is discharged to the outside of the container. When the grass collection container 7 becomes full of grass clippings during lawn mowing work and the entrance 14 of the wind exhaust pipe 15 is blocked by the grass clippings, the wind speed of the exhaust air coming out of the wind exhaust pipe 15 decreases rapidly. and air volume sensor 16
When the rotation speed of The reaping operation according to No. 5 is stopped. Therefore, the operator discharges the grass clippings in the grass collection container 7 to a predetermined discharge location.

The exhaust pipe 15 can be slid up and down to change its position and fixed with a set bolt 17. For example, if the cut grass is very densely packed when piled up and has poor ventilation, the exhaust pipe inlet 14 can be changed. By locating it on the upper side, it is possible to effectively reduce the wind speed in the wind exhaust pipe 15 when the container 7 is full of grass clippings, and it is also possible to effectively reduce the wind speed in the wind exhaust pipe 15 when the container 7 is full of grass clippings. If the wind speed in the wind exhaust pipe 15 does not decrease significantly even after the lawn is full, the inlet 14 can be moved to the bottom side to prevent the fullness detection accuracy from decreasing.

[Brief explanation of the drawing]

The drawings show an embodiment of the structure of a grass collection container for a lawn mower according to the present invention, and FIG. 1 is a longitudinal sectional front view of the grass collection container;
FIG. 2 is an overall side view of the riding lawn mower. 5... Mower, 6... Duct, 7... Grass collection container, 14... Exhaust inlet, 15... Wind exhaust pipe, 16
...Airflow sensor, 18...Inflow port.

Claims (1)

[Scope of utility model registration request] The cut grass is transferred to duct 6 by the conveying wind from mower 5.
The inflow port 18 from the duct 6 is arranged near the opening of the grass collection container 7, and the conveying air flowing in from the duct 6 is directed to the outside of the container. This is a grass collection container structure for a lawn mower, which is provided with an exhaust port for discharging the grass to the outside. A wind exhaust pipe 15 for discharging the air to the opposite direction is provided, and the exhaust inlet 14 of this wind exhaust pipe 15 is configured to be freely changeable in the distance direction with respect to the bottom of the grass collection container, and the exhaust pipe 1
5 is a grass collecting container structure of a lawn mower, which is equipped with an air volume sensor 16.