JPH02124020A - Safeguard of mowing machine - Google Patents

Abstract

PURPOSE:To rapidly and safely manage clogging of reaped weed at a discharge vent by pivoting an upper end of a discharge guide cover on an upper edge of the discharge vent and setting a sensor to stop a motor by >=a fixed range of upward movement of the discharge guide cover. CONSTITUTION:When clogging of reaped weeds occurs at a discharge vent 2 part, the reaped weeds moves a sensing plate 14 of a discharge guide cover 3 upward >=a fixed range and a switch 17 is operated to stop a motor. When an operator removes the reaped weeds, since the motor is stopped and a reaping blade 1 is not being rotated, soil and stone pieces will not scatter from the discharge vent by exhaust air.

Description

[Detailed description of the invention] Industrial applications This invention relates to a safety device for a lawn mower.

BACKGROUND ART AND PROBLEMS TO BE SOLVED BY THE INVENTION In a grass mower, the upper end of a discharge guide cover that rotates to open and close the discharge port is pivotally attached to the upper end of a discharge port for directing grass clippings to the rear. For example, if the discharge outlet is clogged with grass clippings, the operator must notice the clogged grass clippings as soon as possible, otherwise it will be difficult for the operator to mowing the grass smoothly. If the air is exhausted from the exhaust port, there is a risk that dirt, stone chips, etc. will fly away from the exhaust port, which can be dangerous.

Means for Solving the Problems This invention provides an opening angle of the discharge port (2) at the upper end of the discharge port (2) through which the cut grass cut by the cutting blade (1) that rotates once is discharged backward. The upper end of a discharge guide cover (3) that can be changed by rotation is pivotally mounted, and a sensor (5) is installed inside this discharge guide cover (3) to stop the prime mover (4) when upward movement exceeds a certain range. The structure of the safety device for the lawn mower is as follows:

Functions and Effects of the Invention Grass cut by the rotating cutting blade (1) is guided from the discharge port (2) to the discharge guide cover (3) and discharged rearward.

If the area from the discharge port (2) to the discharge guide cover (3) is clogged with grass clippings, the clogged grass will cause the sensor (5) to
moves upward to stop the prime mover (4), so the operator can quickly notice this clogged grass and can therefore cut the grass smoothly.

In addition, when the cut grass is clogged at the discharge port (2) and the cut grass is removed, the prime mover (4) is stopped and the cutting blade (1) is not rotating, so the soil is removed from the discharge port (2) by the exhaust air. There is no risk of scattering of stone chips, etc., and therefore there is little danger.

Example: On the ward side, a pair of left and right front wheels (6) (6) and rear wheels (7) (7) are mounted on a shaft, and a cover is integrated with a cover having a discharge port (2) at the rear end for discharging grass clippings. (8), and on the upper side of this cover integrally (8) is an output shaft (8) that protrudes downward.
9), a cutting blade (1) having a blower blade (10) is fixed to the lower end of the output shaft (9), and A control handle (11) that projects rearward is provided at the rear of the top surface.

A discharge guide cover (3) having retaining plate parts (12) (12) for maintaining a constant opening degree at both left and right ends is pivotally attached to the rear end of the upper surface of the integrated cover (8). A pivot point (1) provided near the middle of the discharge guide cover (3) in the front and back direction.
3) includes a sensing plate (14) of a sensor (5) having an arcuate shape when viewed from the side.
).

Also, at the rear of this sensing plate (14) is the discharge guide cover (
3) is provided with a gate-shaped handle (+5) through which it is slidably inserted, and the discharge guide cover (3) on the leg of this handle (15) is provided.
A spring (16) is provided between the sensing plate (14) and the sensing plate (14) to maintain the sensing plate (14) in a predetermined position. ) is provided with a switch (17) that stops the prime mover (4) when it moves upward over a certain range.

Note that (18) is a container that is suspended from the discharge port (2) and stores the grass clippings that are discharged from the discharge port (2), and each side surface except the front part is made of a flexible mesh. Configure.

When using this container (18), place the discharge guide plate (3) in the upward movement position as shown in Fig. 1 and position the sensing plate (14) in contact with the upper surface of the container (18). .

The grass clippings cut by the cutting blade (1) which rotates at 0 will be stored in the storage body (18) through the discharge port (2) by air blowing by the blower blade (lO). When the container (18) is full of grass clippings, the switch (17) is actuated to move the sensing plate (14) upwards above a certain range via the top surface of the container (18). to stop the prime mover (4).

Figure 2 shows the case where the container (18) is not used, and the cutting blade (
The grass cut in step 1) is guided from the discharge port (2) to the discharge guide covers (3) (12) (12) and discharged rearward. When the discharge port (2) becomes clogged with grass clippings, the grass clippings move the sensing plate (14) upward beyond a certain range, which activates the switch (17) and stops the prime mover (4).

In addition, when the handle (15) is pulled up to inspect the discharge port (2) or install the container (1B), and the sensing plate (10) moves above a certain range, the switch (17) is activated. to stop the prime mover (4).

[Brief explanation of the drawing]

The figures show one embodiment of this invention, and Figs.
The figure is a side sectional view, FIG. 3 is a partial perspective view, and FIG. 4 is a side view of the whole. In the figure, reference numeral (1) indicates a cutting blade, (2) a discharge port, (3) a discharge guide cover, (4) a prime mover, and (5) a sensor.

Claims (1)

[Claims] A discharge guide cover (3) that can change the opening degree of the discharge port (2) by rotating is installed at the upper end of the discharge port (2) that discharges the grass cut by the rotating cutting blade (1) toward the rear. ) is pivoted at the upper end, and inside this discharge guide cover (3), there is a
A safety device for a lawn mower that is equipped with a sensor (5) that stops a prime mover (4) when upward movement exceeds a certain range.