JPS61205420A - Lawn mower - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a structure in which a cutting blade is installed in a housing so as to be rotatable around a vertical axis, and a grass collection container is supplied with cut grass by the air blown by the cutting blade. The present invention relates to a lawn mower provided with a device for detecting and displaying the fullness of one of the collection containers.

[Conventional technology]

In the above-mentioned lawn mower, a conventional full detection display device configured to detect and display the fullness of the grass collecting container based on pressure changes caused by the wind that supplies grass to the grass collecting container has been conventionally used, for example, as shown in FIG. There was something shown. That is, the supply path (
A member (indicating device which also serves as a detection device) is pivotally attached to the field (l field) so as to swing up and down around the axis (1), and when the grass collection container (7) is not full, the container (7) The wind that enters with the grass is easily vented out through the vent hole of the container (7), and the supply air flows through the supply channel (8). (14a) is visible through the supply channel (
When the grass collecting container (7) is full, the air vent hole of the container (7) is opened so that the detection/indicator I is raised by wind force to the non-full position (C) where it protrudes to the outside of the container (8). If the supply channel (8) is clogged with collected grass and it is difficult for air to escape, the supply channel (81K) should be completely filled up so that the display section (14g) becomes invisible due to the lack of airflow in the supply channel (8).
B) The K detection/display device θ4 is configured to move downward.

In other words, full is I! The detection is based on the wind force of the supply path (8), which has the following disadvantages.

[Problem that the invention seeks to solve]

In other words, the wind power in the supply path changes only within the range between a certain positive pressure value at 9 o'clock in the grass collection container and zero pressure when it is full, and the range of change in the detection target value is relatively small. As a result, the detection accuracy deteriorates, or it is necessary to configure the detection device to have excellent detection performance so that the detection can be performed with high accuracy.

An object of the present invention is to detect fullness based on pressure changes caused by the supply of grass, but also to be able to detect with high accuracy even when the grass is relatively easy to imitate.

[Rounding method to solve problems]

The present invention is characterized in that, in the above-mentioned lawn mowing mode, the full detection display device is located within the mowing blade interior of the housing, and the grass discharger is connected to the grass collection container g'llr within the mowing blade interior of the housing. It is a device that detects pressure based on the pressure at a part of the inner part of the cutting blade located near the outlet where the outer peripheral side of the cutting blade moves in a direction approaching the grass discharge port, and its operation and effects are as follows. This is the next step.

[For production]

In the inner cylinder of the cutting blade, there is no negative pressure because the air blown by the cutting blade easily flows out from the grass outlet when the container is not full, and when the container is full, the air blown by the cutting blade flows into the inner cylinder of the cutting blade. Since it becomes difficult for the pressure to flow out from the inside and becomes positive, the range of change in the pressure to be detected becomes wider than that in the conventional case, which is only between zero pressure and positive pressure. Therefore, even if the detection accuracy is relatively low, it is possible to accurately detect and display whether the vehicle is empty or full.

〔Effect of the invention〕

It is easy to accurately determine whether the machine is full or not, and prevents delays in taking out the collected grass and leaving grass behind in the mowing marks, and prevents work being interrupted many times due to taking out the collected grass when the machine is full. , the work can now be done more efficiently with better finishing.

Moreover, it is advantageous from an economical and structural perspective because the detection display device has relatively low manufacturing precision and there is no need for a device to process the detection signal into one that makes it easy to distinguish between empty and full. Now you can get it.

〔Example〕

As shown in Fig. 8 and Fig. 4, a pair of left and right front wheels fl
+ , +11 and rear wheels (21, +21), and the upper surface side of a cutting blade housing (4) that also serves as a machine frame and has a cutting blade (3) inside thereof so as to be rotatable around a vertical axis (P). is provided with an engine (6) that drives the cutting blade 13),
A control handle (81) is attached to the rear of the housing (4), and the cutting blade housing (
4), and
It is attached so that it can be attached and detached to form a walk-behind lawn mower.

As shown in FIG. 1, a transparent cylindrical body (9) is connected to the lateral side wall (4a) of the housing (4) and is positioned on the lateral outside of the housing (4) in the vertical direction of the machine body. The lower end side is located inside the part of the housing (4) in which the cutting blade (3) is internally housed, and in the vicinity of the grass discharge port (llll) for the supply path (8) inside the cutting blade internal part. of which the outer peripheral side of the rotating cutting blade (3) moves in a direction approaching the grass discharge port tio+), and a sphere (II) is installed inside the cylindrical body (9) so as to be movable up and down. The fullness detection and display device Q21 is configured to detect and display the fullness of the grass collection bag (7) based on the internal pressure of the housing caused by air blowing by the cutting blade (3).

That is, if the bag (7) is not full, the wind that enters the bag (7) together with the grass can be easily extracted from the weave of the air holes, so that the air blown by the cutting blade (3) is directed to the grass outlet tlo.
As shown in Figure 2, the flow smoothly flows out from the + and becomes negative pressure at the point (4).
3) so as to fall to the non-full display position (C) supported by the lower 121 part.

When the bag (7) is full, the weave is clogged with collected grass and the wind that enters with the grass becomes difficult to remove from the bag (7). As water flows out from inside the blade interior and positive pressure is created at the point (4), the sphere (11) is moved by the wind pressure acting inside the cylindrical body (9), as shown in Figure 1. The cylindrical body (9) is raised to the full display position (B) at the upper end thereof.

[Another example]

The detection and display configuration consists of an electric sensor that detects the pressure at point ω, and a display device that operates the display and display lamp based on the information from this sensor. The present invention is also applicable to the case where the above method is employed.

A basket may be used instead of the grass collection bag (7), and these are collectively referred to as a grass collection container (7).

[Brief explanation of drawings]

The drawings show an example of a lawn mower related to a non-occurrence case, and FIG. 1 is a cross-sectional view of the detection device in the full detection state, FIG. 2 is a cross-sectional view of the detection device in the non-full detection state, and FIG. A side view of the entire mower, Figure 4 is a walk-behind lawn mower #) 4! FIG. FIG. 5 is a sectional view of a conventional detection and display device. (3)...Mowing blade, (4)...Housing, (7)...Grass collection container, (lO)...
・Discharge port, (I4...Full detection display device, prisoner)
...Position, (P) ...Axis center.

Claims (1)

[Claims] The cutting blade (3) is installed inside the housing (4) so as to be rotatable around the vertical axis (P), and the grass collecting container (7) is attached to the cutting blade (3).
A device (1) for detecting and displaying the fullness of the grass collection container (7) is provided in such a state that cut grass is supplied by air blowing by
2), wherein the full detection display device (12) is located within the mowing blade interior of the housing (4), and the lawnmower is located within the mowing blade interior of the mowing blade with respect to the grass collection container (7). Detection is performed based on the pressure at a location (A) where the outer circumferential side of the mowing blade (3) moves in a direction toward the grass discharge port (10) in the inner part of the mower blade located near the discharge port (10). A lawn mower that is a device.