JPH0471483B2 - - Google Patents

Description

Detailed Description of the Invention [Industrial Application Field] The present invention is configured to supply cut grass to a grass collection container via a duct by the conveying wind from a mower, and to A cut grass supply path that allows wind to flow in toward the inner back side of the grass collection container, an exhaust port that guides and discharges conveying air in a direction opposite to the inflow direction of the cut grass, and an exhaust that is formed in communication with the exhaust port. The present invention relates to a grass collection container structure for a lawn mower, which is provided with an air passage and a landscape sensor is provided in the air exhaust passage.

[Conventional technology]

Some lawn mowers have the structure described above to detect when the grass collection container is full of cut grass. In this configuration, the grass clippings are accumulated one after another from the innermost side, and when the grass collecting container is nearly full with clipped grass, the exhaust port is blocked by the clipped grass. As a result, the air volume sensor detects a sudden decrease in the amount of air passing through the air exhaust path, and determines that the grass collection container is full of grass clippings.

[Problem that the invention seeks to solve]

If the grass clippings are relatively thin or contain a lot of moisture, the air permeability of the grass clippings accumulated in the grass collecting container will be relatively poor. Once the exhaust air reaches the opening of the exhaust port 11, the volume of the exhaust air flowing out from the exhaust inlet 11 decreases rapidly, so that the air volume sensor 13 can accurately detect the full state of the grass collection container 7. If the air permeability is good, even if grass clippings block the exhaust inlet 11 as shown in Figure 2, the amount of exhaust air flowing out from the exhaust outlet 11 will not be sufficiently reduced, and the grass collection container will be closed. Even if 7 is full, this is the air volume sensor 1.
There were cases where detection was not possible with 3.

The present invention focuses on the above-mentioned problem and aims to provide a grass collection container structure that can accurately detect the full state of the grass collection container in accordance with changes in the state of cut grass.

[Means for solving problems]

The feature of the present invention is that the cut grass is supplied to the grass collecting container through the duct by the conveying air from the mower, and the grass is collected from the main body of the grass collecting device and the lid body that covers the opening of the main body. The mown grass constitutes a container, and the outlet of the duct in the grass collector is provided in a position close to the opening of the grass collector body, and the conveying air from the outlet flows toward the bottom side of the grass collector body. A supply path, an exhaust passage that guides the conveying air from the bottom side of the grass collector body toward the opening side of the grass collector body at a position away from the exhaust port, and the amount of conveyed air passing through this exhaust passage. In a grass collection container structure for a lawn mower, each of which is equipped with an airflow sensor for detection, the position of the ventilation inlet in the ventilation passage is configured to be freely changeable in the distance direction relative to the bottom of the grass collector body. It is characterized by

[Effect]

According to the above-mentioned characteristic structure, when mowing grass that has poor ventilation when piled up, the exhaust inlet 11 can be positioned upwardly away from the bottom of the grass collecting container 9, as shown in FIG. When the grass container 7 becomes full of cut grass, the exhaust inlet 11 becomes blocked with the cut grass almost at the same time.

In this case, even if the layer of cut grass from the cut grass supply path 10 to the exhaust inlet 11 is thin, the conveying air can be sufficiently blocked due to the poor air permeability of the cut grass. The amount of air flowing in decreases rapidly.

On the other hand, if the grass has good air permeability,
As shown in FIG. 3, if the opening position of the exhaust inlet 11 is located at the bottom side of the grass collection container 7 along the perspective direction with respect to the bottom, when the grass collection container 7 is almost full with cut grass, The distance between the exhaust inlet 11 and the upper surface of the accumulated grass, that is, the grass cut layer is sufficiently thick, and even if the ventilation is good, the conveying wind can be sufficiently blocked, and the amount of air flowing into the ventilation passage W is Decrease rapidly.

In other words, by changing the position of the exhaust inlet 11, the exhaust inlet 11 can be adjusted regardless of the air permeability of the grass.
Air volume sensor 1 measures the air volume flowing into the exhaust passage W from
3, the amount decreases to such an extent that a full state can be detected.

〔Effect of the invention〕

As described above, it has become possible to accurately detect the full state of the grass collection container in response to different conditions of the grass clippings, and the grass collection container full detection performance of the lawn mower has been improved.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

As shown in FIG. 4, 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 configured so that the cut grass is sent to a grass collecting container 7 at the rear of the machine body through a duct 6.

Next, the structure of the grass collecting container 7 will be described in detail. As shown in FIGS. 1 and 4, the grass collecting container 7
The upper hood 8, which can be opened and closed freely around the horizontal axis _P1 at the rear of the fuselage, and the central partition plate 9a allow the left and right sides to be separated.
It consists of a grass collector main body 9 divided into chambers. Then, the upper hood 8 is placed so that the discharge port 6a of the duct 6 from the mower 5 in the grass collecting container 7 is at a height near the opening at the upper part of the grass collecting device main body 9.
The cut grass fed into the grass collection container 7 by the conveying air from the duct 6 passes through the cut grass supply channel 10 formed in the upper hood 8 to the grass collection container main body 9. It is sent to the lower end side.

More specifically, a partition plate 14 extends downward from the upper hood 8 as shown in the figure, and an exhaust inlet 11 is formed between the partition plate 14 and the side wall of the grass collector main body 9. This exhaust inlet 11
An exhaust passage 12 is formed in the upper hood 8, and the exhaust inlet 11 and the exhaust passage 12 constitute an exhaust passage W. A propeller-type air volume sensor 13 is installed in the exhaust passage W. is being set up. An auxiliary partition plate 14a is slidably attached to the partition plate 14 on the bottom side of the grass collector body 9, and by sliding the auxiliary partition plate 14a toward the bottom side of the grass collector body 9. Therefore, the opening position of the exhaust inlet 11 is changed in the depth direction of the grass collection container 7 between the upper hood 8 and the bottom of the grass collector main body 9.

The state in which the grass clippings block the exhaust inlet 11 is [effect]
2 and 3, when the grass collection container 7 becomes full of grass clippings, the amount of air flowing out from the exhaust inlet 11 to the exhaust air passage 12 decreases, and the rotation speed of the air amount sensor 13 is set. When the value falls below this value, this is detected electrically and the operator is warned by a buzzer or lamp (not shown).

[Another example]

In the above embodiment, only one set of exhaust inlet 11, exhaust air passage 12, and air volume sensor 13 are provided on the left side of the upper hood 8 as shown in FIG. It is also possible to have a structure in which an exhaust inlet 11, an exhaust passage 12, and an air volume sensor 13 are added.

[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;
Figure 2 shows the flow of conveying air at a position where the exhaust port is far from the inside of the grass collection container, and Figure 3 shows the flow of conveyance air at a position where the exhaust port is close to the inside of the grass collection container. FIG. 4 is an overall side view of the riding lawn mower. 5...Mower, 6...Duct, 7...Grass collection container, 10...Mowed grass supply path, 11...Exhaust inlet, 1
2...Exhaust passage, 13...Air volume sensor, W...Exhaust passage.

Claims (1)

[Claims] 1 configured to supply cut grass to a grass collection container 7 via a duct 6 by the conveying wind from the mower 5;
The grass collector body 9 and the lid 8 that covers the opening of the grass collector body 9 constitute the grass collector 7, and the outlet 6a of the duct 6 in the grass collector 7 is connected to the opening of the grass collector main body 9. A cut grass supply path 10 is provided at a position close to the discharge port 6a and allows the conveying air from the discharge port 6a to flow toward the bottom side of the grass collector main body 9; The grass collector includes an exhaust passage W that guides conveyed air from the bottom side of the main body 9 toward the opening side of the grass collector body 9, and an air volume sensor 13 that detects the amount of conveyed air passing through this exhaust passage W. A grass collection container structure for a lawn mower, which has an air exhaust inlet 1 in the air exhaust passage W.
A structure of a grass collecting container for a lawn mower, in which the position of the grass collecting container 1 can be freely changed in the distance direction with respect to the bottom of the grass collecting device main body 9.