JPH0440432Y2 - - Google Patents

Description

[Detailed Description of the Invention] A. Purpose of the Invention [Field of Industrial Application] The present invention relates to a handle attachment device for a lawn mower, particularly a rotary lawn mower.

[Conventional technology]

In this type of lawn mower, it is known that the cutting blade housing is made of synthetic resin and the operation handle is attached to a handle attachment boss provided integrally with the housing.

[Problems to be Solved by the Invention] However, in the past, since the above-mentioned handle attachment boss was provided on the plate surface of the cutting blade housing, there was a risk of insufficient rigidity.

The present invention aims to solve the above problems.

B. Structure of the invention [Means for solving the problem] That is, in a lawn mower in which the cutting blade housing 1 is formed of synthetic resin and the operating handle 2 is attached to the housing 1, the peripheral wall of the cutting blade housing 1 is A reinforcing flange 10 is integrally formed on the lower outer surface of both sides of the cutting blade housing 1, and handle mounting bosses 3, 17 are integrally provided on the flange 10 and the rear upper part of the cutting blade housing 1, and a handle mounting boss 3, 17 is integrally provided on the rear upper part of the housing. A reinforcing rib 19 is provided along the rear upper corner of the housing integrally with the boss 17, and the handle 2 is attached and supported by both handle attachment bosses 3 and 17.

[Effect]

A handle 2 is attached to reinforcing flanges 10 integrally formed on the lower outer surface of both sides of the peripheral wall 1a of the cutting blade housing 1.
By providing the above-mentioned mounting boss 3, the boss 3 is reinforced with the flange 10 and its rigidity is increased, and the handle 2 is provided with the above-mentioned handle mounting boss 3.
and the handle attachment boss 17 on the rear upper part of the cutting blade housing having reinforcing ribs 19, and are attached and supported at two locations on one side and four locations on both sides, making it possible to firmly fix the handle attachment boss 17.

〔Example〕

A detailed explanation will be given below based on the embodiment shown in the drawings.

Figure 1 is a perspective view of a rotary lawn mower to which the present invention is applied, Figure 2 is a side view of the handle attachment part,
FIG. 3 is a plan view thereof.

In the illustrated lawn mower, front and rear wheels 4 and 5 are supported by a cutting blade housing 1, and an engine 6 is mounted on the upper surface of the housing 1 with a crankshaft substantially perpendicular to the housing 1.
A rotary cutting blade 7 is attached to the lower end of the crankshaft within the cutting blade housing 1, and the grass cut by the cutting blade is stored in a grass bag 8 at the rear.

As shown in FIG. 3, the mowing blade housing 1 has a cover 12 that covers the wheels 4a of the front wheels 4 at the front of a mowing blade accommodating section 11 having a substantially circular bottom surface, and a cover 12 that covers the wheels 4a of the front wheels 4 at the rear of the accommodating section 11, and a cover 12 that covers the cut grass at the rear of the accommodating section 11. Guide ducts 13 leading to the grass collection bag 8 are each formed integrally. 14,1
5 is the left and right sides 1 of the cover 12 and the duct 13
These are bearing bosses for the front and rear wheels 4 and 5 that are integrally provided on 2a and 13a.

The flanges 10 are formed in a downward L-shape on the outer lower surface of both the left and right sides of the peripheral wall 1a of the blade housing 1 as shown in Fig. 4, and the handle mounting bosses 3 are integrally formed with the flanges 10 as shown in Fig. 5. Each flange 10 may be extended up to the bearing bosses 14, 15 as shown in Fig. 3.

The operating handle 2 is a substantially U-shaped front handle 21 and a rear handle 22 that are foldably connected together in the figure, and both ends 21a of the front handle 21 are bolted to the mounting boss 3 mentioned above. 16
An example is shown in which it is attached with a bolt 18 to a boss 17 that is integrally provided at the rear upper part of the duct side surface 13a. 16a is a nut for the bolt 16, which can be molded integrally with the boss 3 as shown in FIG. The same applies to the nut for the bolt 18.

As shown in FIG. 6, the rear upper boss 17 is provided with a reinforcing rib 19 integrally with the rear upper corner of the duct side surface.

In addition, by arranging plate-shaped reinforcing ribs 20 on the inner surface of the flange 10 as shown in FIG. 7, the rigidity of the flange 10 is increased, and the strength of the handle attachment boss 3 provided on the flange 10 is further increased. I can do it.

C. Effects of the invention As described above, the present invention provides a reinforcing flange 10 integrally formed on the cutting blade housing 1 and a handle attachment boss 3, 17 on the rear upper part of the cutting blade housing 1.
In addition, a reinforcing rib 19 is provided along the corner of the rear upper part of the housing integrally with the handle attachment boss 17 at the rear upper part of the housing, and the handle 2 is attached to and supported by both the handle attachment bosses 3 and 17. Since the above handle mounting boss 3,
17 are a reinforcing flange 10 and a reinforcing rib 1, respectively.
9 increases the rigidity, and the handle 2 is attached and supported at two locations on one side, the above-mentioned handle attachment bosses 3 and 17, and a total of four locations on both sides, increasing the mounting strength of the handle 2. Even if the cutting blade housing is made of synthetic resin, the handle can be firmly attached and supported.

[Brief explanation of the drawing]

Figure 1 is a perspective view of a rotary lawn mower to which the present invention is applied, Figure 2 is a side view of the handle attachment part,
Figure 3 is a plan view, Figures 4 and 5 are enlarged sectional views taken along the lines - and - in Figure 2, Figure 6 is a perspective view of the handle attachment part of the modified example, and Figure 7 is a reinforcing rib inside the flange. It is a bottom view of the cutting blade housing of the example provided with this. 1 is a cutting blade housing, 10 is a flange, 2 is a handle, and 3 is a boss for attaching the handle.

Claims (1)

[Scope of Claim for Utility Model Registration] In a lawn mower whose cutting blade housing is made of synthetic resin and an operating handle is attached to the housing, reinforcing flanges are integrally formed on the lower outer surface of both sides of the peripheral wall of the cutting blade housing. A handle attachment boss is integrally provided on the flange and the rear upper part of the cutting blade housing, and a reinforcing rib is provided along the rear upper corner of the housing integrally with the handle attachment boss on the rear upper part of the housing. A lawn mower handle attachment device, characterized in that a handle is attached and supported by both handle attachment bosses described above.