JPS596659Y2 - Anti-vibration and safety device for shoulder straps for brush cutters - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an anti-vibration and safety device for a shoulder band for a brush cutter.

To prevent vibrations from being transmitted from the brush cutter to the eyebrows of the human body, a shock absorber is provided between the shoulder band and the main body of the connecting fitting for hanging the brush cutter. ing.

), in order to prevent the danger of the brush cutter coming off the brow if the cushioning material made of rubber etc. breaks, the brush cutter should be positioned appropriately as shown in Figure 4. The bush cutter is supported by being lifted up by a band 29 via a cushion ring 25 made of an elastic material in the form of a ring, and the bush cutter and the band 29 are connected by a safety fitting 27 made of a stronger material than the cushion ring 25. Separately, the loosening is done via a ring designated 21.

) has been proposed (note, Japanese Utility Model Publication No. 50-8890).

However, in the one described in this publication, the ring 2
First, it is necessary to connect two members, the cushion ring 25 and the safety fitting 27, which requires a lot of effort to assemble, and this is combined with the fact that the cushion ring 25 and the safety fitting 27 are made of different materials. Therefore, it was inevitable that the cost would increase.

Furthermore, in the device described in this publication, there is a risk that the band 29 may come into contact with a certain safety fitting 27 in a structure related to vibration transmission, and therefore, it is difficult to completely prevent vibration transmission.

In order to eliminate the above-mentioned inconvenience, the applicant company first bored an upper window and a lower window in the main body of the connecting fitting for hanging the hanging fitting, and used the upper window to connect the lower part. Hook the rubber shock absorbers from the front and rear plates, insert the shoulder strap from the front into the groove cut into the top of the shock absorber, and then insert it into the groove at the top of the buckle. Insert it from the front and into the groove at the bottom from the rear, then pass it through the front of the lower window and bring it out to the rear, and then pass it through the bottom of the buckle from the front and pass it through the groove at the top to the front. We have developed and applied for a vibration-proofing and safety device for a shoulder strap for a brush cutter (see Japanese Patent Application Laid-open No. 54158732), and are currently at the stage of prototype experimentation. It has been confirmed that the objective can be achieved.

The present invention was developed as a part of the earlier application mentioned above, and its purpose is to prevent the transmission of vibration with an extremely simple structure, and since it is made of rubber, there are problems in terms of service life. (Note: Although it has an anti-vibration effect, it depends on the strength to withstand load and aging etc.) Even if the shock absorber breaks,
To provide a vibration-proof safety device for a shoulder band for a brush cutter, which can effectively prevent a hanging metal fitting from falling.

Another object of the present invention is to provide a vibration-proofing and safety device for a shoulder strap for a brush cutter that can be manufactured at a lower cost than that of the prior application mentioned above.

Next, an embodiment of the present invention that can achieve the above object will be described in detail with reference to the accompanying drawings.

a is a connecting fitting body with windows 1 on the left and right sides (note: for hanging hanging fittings).

), 2 is two rubber annular cushioning materials, 3 is window 3
There are two buckle fittings having numbers a and 3 b, and 4 indicates two shoulder bands, each one of which is inserted into the window 1 of the connecting fitting body a, and then the connecting fitting body a is inserted into the window 1 of the connecting fitting body a. It is folded in half on one side and extends upward.

When the annular cushion material 2 is folded in two,
Each of them is inserted into the window 1 and hooked onto the upper edge 1a of the window 1.

By being folded in half and hooked on the upper edge 1a, there are two loops 2 on the top.
a, 2 b are naturally formed.

Further, the midway of the folded part of the shoulder strap 4 is inserted from the window 3b to 3a of the buckle fitting 3, and the window 3a
The two-fold shape is separated at the section, one separated piece is extended directly upward from the window 3a, and the other separated piece is inserted through the loop-shaped parts 2a and 2b and then extended upward. There is.

In this embodiment, the lower part of the buckle fitting 3 and the lower part of the loop-shaped parts 4a and 4b are held by the ring fitting 5, so that the loop-shaped parts 2b and 2C can be attached to the left and right sides in FIG. Although the ring fitting 5 is prevented from separating in the direction, this is not necessarily necessary for the ring fitting 5.

Further, 6 is a hanging plate formed on the lower part of the connecting fitting main body a, 7 is a ring-shaped hanging fitting hooked on the hanging plate 6, and 8 is a hanging fitting 7.
A vertically movable plate is shown to maintain the hanging condition and to allow it to fall off.

According to the device of the present invention having the above structure, even if the annular cushioning material 2 is cut for any reason (for example, due to excessive tension in the vertical direction, aging, etc.), the bifold shape of the band 4 is maintained. By hooking the lower end portion thereof to the upper edge 1a of the window 1'', the connecting fitting main body a is prevented from falling off from the band 4, and the structure can be made relatively simple.

[Brief explanation of the drawing]

1 and 2 show an embodiment of the anti-vibration and safety device for a shoulder strap for a brush cutter according to the present invention, FIG. 1 is a front view, and FIG. 2 is a sectional view taken along line II-II of the same. FIG. 3 is a sectional view taken along the line II--III of FIG. 1 showing the main body of the connecting fitting to which the device of the present invention is applied and its related structure, and FIG. 4 is a front view of the conventional example. a...Connecting fitting body, 1...Window, 1a
...Top edge, 2...Annular cushioning material,
2a, 2b...Loop-shaped portion, 3...Buckle fitting, 3a, 3b...Window, 4...Shoulder band.

Claims (1)

[Scope of utility model registration request] Drill windows 1 on the left and right sides of the connecting metal fitting body a for hanging the hanging metal fitting, insert one shoulder band 4 into each window 1, and fold it in two on one side of the connecting metal fitting body a. The annular cushioning material 2 is extended upward, folded in half, inserted into the window 1, and hooked onto the upper edge 1a of the window 1, thereby forming two loop-shaped parts 2 on the upper part of the annular cushioning material 2.
a, 2b, and then a shoulder strap 4 as described above.
Insert the window 3b of the buckle fitting 3 into the middle of the folded part.
Insert it into the window 3a, separate the folded part at the window 3a, and insert the separated piece into the window 3a.
The other separating piece is extended directly upward from the loop-shaped portion 2a.
, 2b and extends upward to provide a vibration-proofing and safety device for an eyebrow band for a brush cutter.