JPH04148613A - Finely cutting device of reaped weed - Google Patents

Abstract

PURPOSE:To obtain the subject device having relatively few numbers of parts and finely cutting reaped weeds after reaping by providing guide parts introducing reaped weeds to a central side of cutting blades. CONSTITUTION:Plural stages of reaping blades 10 are provided around a vertical shaft 7 and reaped weeds thrown from a taking-in port 13 are cut with the cutting blades by introducing the weeds into a central side of the cutting blades 10 before discharging through a discharging port 14.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a grass clipping device for finely cutting grass clippings such as grass cut by a lawn mower.

[Conventional technology]

In general, lawn mowers include means for collecting grass clippings by carrying a grass collection container on a self-propelled body, and methods for discharging grass clippings onto the lawn surface without providing a grass collection container.

The former method is used for lawns where the appearance is important, such as parks and gardens in tourist areas where it is necessary to maintain a beautiful lawn surface.
In parks, sloped lawns on banks, etc. where the appearance is not so important, the latter method is used as it is more economical.

By the way, when cutting long grass using the latter method, the long grass that is released onto the lawn after mowing is too conspicuous and unsightly, and the decay of the grass that is later turned into fertilizer is also too noticeable. Because of the inconvenience,
There has been an increasing demand for cutting grass clippings into small pieces before releasing them.

An object of the present invention is to rationally realize a cut grass shredding device that shreds cut grass after mowing.

(Means for Solving the Problems) For the above purpose, the present invention provides cutting blades that rotate around a vertical axis and are stacked in multiple stages above and below; The cut grass shredding device consists of a housing equipped with a discharge port for the cut grass shredded by the blade, and a guide member for guiding the cut grass toward the center of the cutting blade is attached to the inner surface of the housing. be.

It is convenient to attach the plurality of cutting blades to a vertical rotating shaft of a mower equipped with a cutting blade, or to attach a fixed receiving blade for the cutting blades to the inner surface of the housing.

[For production]

By rotating the cutting blade around the vertical axis, grass clippings can be cut more effectively using the entire cutting blade than when rotating around the horizontal axis.Moreover, by having multiple cutting blades, , you can expect a shredding action with no omissions.

A certain amount of clearance is required between the housing and the outer periphery of the cutting blade due to the structure, or a guide member attached to the inner surface of the housing always directs the grass clippings towards the center of the cutting blade. It will be possible to prevent the grass clippings from slipping through as much as possible.

In the structure of the second aspect, since the grass clipping device is integrally attached to the mower, there is no need to provide a section for mounting the grass clipping device on the self-propelled machine body.

With the configuration of claim 3, the cutting action is further strengthened.

(Effects of the Invention) According to the structure of claim 1, it is possible to provide a rational grass clipping device that can reliably shred grass with a relatively small number of parts, and discharge grass clippings onto a lawn. It was possible to improve the appearance of the cut grass surface after release by means of the method, regardless of the length of the planted grass.

The grass clippings shredding device according to the second aspect of the present invention can be compactly mounted on a lawn mower and has high practical value since it does not require a dedicated drive source.

With the grass clippings shredding device according to the third aspect, a more reliable shredding effect can be expected.

〔Example〕

FIGS. 1 and 2 show how a grass clippings shredding device is mounted on a walk-behind lawn mower.

This lawn mower has a vertical shaft engine (
2), and a pair of left and right wheels (3) at the front and rear of the cutting blade housing (1), respectively.

(4), and a control handle (5) extending above the rear.

A bar blade (6) with cutting blade portions formed at both ends is provided inside and below the cutting blade housing (1), and this bar blade (6) is connected to the lower end of the downward output shaft (7) of the engine (2). They are connected and configured to rotate around a vertical axis. On the other hand, the power of the engine (2) is branched and transmitted to the transmission case (9) via the rearward transmission shaft (8), and drives the rear wheels (4), (4) to drive the vehicle while self-propelled on the lawn. It is constructed so that it can be used for mowing work.

A grass clippings shredding device (A) is installed inside the cutting blade housing (1). That is, the cut grass is cut from the two upper and lower cutting blades (10), (10) attached to the output shaft (7), and the cylindrical housing (11) surrounding these cutting blades (10), (10). A cutting device (A) is constructed, and upper and lower cutting blades (10) are provided on the inner surface of the housing (11).

Guide members (12) for guiding the grass clippings toward the center of the cutting blade are attached at four locations between (10) and (10).

The upper opening (13) of the housing (11) serves as an intake port for grass clippings, and the lower opening (14) serves as an outlet for shredded grass clippings. In addition, the housing (11) has four bracket parts (1
5) is fixed to the ceiling surface of the cutting blade housing (1).

The outer circumference of the bar blade (6) is formed with upwardly folded grooves 16) and (16) for blowing the grass clippings upward, and the inner circumference is formed with upward folds 16) and (16) for pulling the grass clippings into the housing (If) and pulling the grass clippings into the housing (If). Downward folds 17) and (17) are formed to blow out the water downward.

Therefore, the grass clipped by the bar blade (6) passes through the passage (S) between the outer surface of the housing (11) and the inner surface of the cutting blade housing (1), and passes through the upper opening (13) to the housing (
11) Go inside and find two cutting blades (10).

After being shredded at (10), it is discharged onto the lawn through the lower opening (14).

[Another example]

■ As shown in Figures 3 and 4, a walk-behind lawn mower with its cut grass discharge port (18) connected to its intake port (13) and cut grass shredded with a dedicated engine (19). The device (A) may also be attached.

A fixed receiving blade (20) that pairs with each cutting blade (10) is provided on the inner surface of the housing (11) to enhance the shredding effect.

■ As shown in Figure 5, the cutting blade housing (1) is structured to also serve as the housing for the cutting blades (10), (10), and the discharge port (14) is opened by the upward blowing force of the bar blade (6). It may be provided at an upper position.

■ As shown in FIGS. 6 and 7, a grass clipping device (A) may be mounted on a front-marant or mid-mount riding lawn mower. In the front mount type, the engine (2) of this machine drives the grass cutting device (A), and in the mid-mount type, the dedicated engine (19) drives the grass cutting device (A).
It is equipped with.

Incidentally, although reference numerals are written in the claims section for convenient comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.

[Brief explanation of drawings]

The drawings show an embodiment of the grass cutting device according to the present invention.
The figure is a cross-sectional side view showing the device installed inside a walk-behind lawn mower, FIG. 2 is a cross-sectional plan view of the mower in FIG. 1, and FIG.
7 to 7 are views showing other embodiments of the shredding device. (6)...Mowing blade, (7)...Rotating shaft,
(10)... Cutting blade, (11)... Housing, (12)... Guide member, (14)
...Discharge port, (20) ...Blade.

Claims (1)

[Claims] 1. Cutting blades (10) that rotate around a vertical axis and are arranged in multiple layers above and below; a housing (1) with an outlet (14) for the grass clippings shredded by the blade (10);
A grass clippings shredding device comprising: (1) and having a guide member (12) attached to the inner surface of the housing (11) for guiding grass clippings toward the center of the cutting blade (10). 2. The grass clippings shredding device according to claim 1, wherein the plurality of cutting blades (10) are attached to a vertical rotating shaft (7) on which a cutting blade (6) of a mower (M) is mounted. 3. The cutting blade (1) is attached to the inner surface of the housing (11).
3. The grass cutting device according to claim 1, further comprising a fixed receiving blade (20) for said cut grass.