JPH0140435Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a grip structure for agricultural and forestry equipment such as brush cutters and chain saws.

[Prior Art] Japanese Utility Model Publication No. 45-708 discloses a device for preventing vibrations in the grip structure of agricultural and forestry equipment by providing a cavity in the grip portion made of an elastic material such as rubber.

[Problems to be solved by the invention] This conventionally known grip has a grip body made of rubber or flexible plastic, a cavity is formed inside the grip body, and both end surfaces are fixed with tensioning devices. However, most of the vibrations were only absorbed by the elasticity of the grip body, and effective vibration isolation was not achieved, which was insufficient to reduce operator fatigue.

[Means for Solving the Problems] Therefore, in order to solve the above problems, the present invention provides grips 5 and 10 that are fixed to agricultural and forestry equipment driven by engines 2 and 2' etc. using an elastic material such as rubber. The grip portions 5a of the grips 5, 10 are formed into a cylindrical shape.
Space parts 5b and 10b are provided in 10a, and liquid A such as oil is filled in the space parts 5b and 10b, and the space parts 5b and 10b are formed except for the grip parts 5a and 10a. The grips 5, 10 are
When vibration is transmitted to the gripping parts 5a, 10a, the liquid A receives this vibration pressure and oscillates minutely, causing the thin wall parts 5e, 10e to move slightly, thereby absorbing the vibration. It is composed of

[Function] With the above configuration, vibration transmission to the grip of the present invention is significantly reduced, thereby reducing operator fatigue.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 shows a case where the present invention is applied to a brush cutter, which is a type of agricultural and forestry equipment.

That is, in the brush cutter, an engine 2 is attached to one end of an operating rod 1, a working tool 3 such as a cutting blade is attached to the other end, and a handle 4 is fixed halfway along the operating rod 1 closer to the engine 2 side.

This handle 4 has a substantially U-shape attached to it, and grips 5, 5 are attached to both free ends of the handle 4.
is installed.

Further, a hanging metal fitting 6 is fixed to the engine 2 near the handle 4 side, and the operator locks a shoulder band (not shown) to this hanging metal fitting 6, and then lifts the handle 4.
By gripping the grips 5, 5 and swinging the operating rod 1 in the left and right directions, the work tool 3 is used to cut down weeds and the like.

The aforementioned grip 5 is fixed to the end of the handle 4 as shown in FIG.

That is, the grip 5 is provided with a gripping part 5a made of an elastic material such as rubber, a space 5b formed in the gripping part 5a, a cavity 5c, an attachment part 5d to the handle 4, and the like. The part 5b is filled with liquid A such as oil, and the space part 5b is filled with liquid A such as oil.
and the empty space 5c are adjacent to each other with a thin wall portion 5e interposed therebetween.

Further, the space portion 5b is a fitting portion 5 with the handle 4.
It is communicated with f through a small-diameter communication portion 5g.
7 is a sealing material that prevents liquid A from leaking. The empty chamber 5c is communicated with the atmosphere through an opening 5h, but this opening 5h may be closed with a closing member (not shown).

To attach such a grip 5 to the handle 4, first, the mounting portion 5d side of the grip 5 is directed upward, and the space 5b is filled with liquid A such as oil. After filling the space 5b with the liquid A, the sealing material 7 is pushed into the fitting part 5f to close the communication part 5g, and then the end of the handle 4 is press-fitted into the fitting part 5f. let

In this way, leakage of the liquid A from the space 5b is prevented, and finally, the tightening band 8 is attached to the mounting portion 5d, and the bolt and nut 9 are tightened and fixed.

Therefore, the operator grips the grips 5a, 5a and performs the work, but the vibrations of the engine 2, work tool 3, etc. transmitted from the handle 4 are transmitted to the grips 5a, 5a.
a is made of an elastic material such as rubber;
Further, a liquid A is sealed in the space 5b, and when vibration is transmitted to the gripping portion 5a, the liquid A receives vibration pressure and oscillates minutely, causing the thin wall portion 5e to vibrate. As shown by the imaginary line, the vibration of the gripping part 5a is absorbed, and the vibration transmitted to the operator is significantly reduced, resulting in good workability.
Workers can work for long periods of time with less fatigue.

Further, FIGS. 3 and 4 show another embodiment of the present invention.

In this other embodiment, as shown in FIG. 3, an engine 2' is attached to one end of the operating rod 1', a working tool 3' such as a cutting blade is attached to the other end, and a loop-shaped handle is attached to the middle of the operating rod 1'. In the case where 4′ is fixed,
The grip 10 is attached to the upper part of the handle 4', or the grip 10 is directly attached to the operating rod 1'.

Since it is common to the grip 5 of the previous embodiment, the alphabetical characters are numbered in correspondence with each other.

In another embodiment, the empty chamber 10c is formed by using a part of the handle 4' [or the operating rod 1'] as a wall member, and the communicating part 10g is formed by using the connecting part 10.
They are provided with openings at the outer peripheral portions of d and 10d, respectively.

Note that the space portion 10b is formed in a cylindrical shape.

To attach the grip 10 to a handle 4', etc., insert the grip part 10a into the handle 4' as shown in Fig. 4, inject liquid A such as oil through one communicating part 10g, and then After confirming the leakage of liquid A and filling the space 10b with the liquid, sealing material 1 is inserted into the opening of each communication portion 10g, 10g.
1 are brought into sealing contact, a tightening band 8 is wrapped around the sealing material 10, and the bolts and nuts 9 are firmly tightened.

Therefore, the communication portions 10g, 10g are designed to prevent liquid A from leaking out. Alternatively, the space 10b of the grip 10 may be filled with the liquid A and sealed with the sealant 11, and then attached to the handle 4'. Further, as shown in FIG. 5, the grips 10 of the other embodiment described above can be attached to both ends of the handle 4, which is substantially U-shaped as shown in FIG. 12 is a blind plug.

[Effects of the invention] As explained above, the invention provides engine 2,
The grips 5, 10, which are fixed to agricultural and forestry equipment driven by the grips 2' and the like, are formed into a cylinder shape from an elastic material such as rubber, and the grips 5, 10 have spaces 5b, 10b inside the gripping parts 5a, 10a. provided, the space portion 5b,1
The inside of the grip 5 is filled with a liquid A such as oil, and a part of the wall forming the space 5b, 10b excluding the grips 5a, 10a is formed into a thin wall. , 10, when the vibration is transmitted to the gripping parts 5a, 10a of the liquid A, the liquid A receives this vibration pressure and oscillates minutely, causing the thin wall parts 5e, 10e to move slightly, thereby absorbing the vibration. As a result, vibration transmission to the grips 5 and 10 is significantly reduced, which has the effect of reducing operator fatigue.

[Brief explanation of the drawing]

Figure 1 is a perspective view of agricultural and forestry equipment to which the present invention is applied;
Fig. 2 is a sectional view of the main part of the present invention, Fig. 3 is a perspective view of another embodiment of agricultural and forestry equipment, Fig. 4 is a sectional view of the main part of another embodiment of the invention, and Fig. 5 is a sectional view of the main part of another embodiment of the invention. FIG. 3 is a cross-sectional view of the main parts of the embodiment. 1, 1'...operation lever, 2, 2'...engine,
3, 3'...Work tool, 4, 4'...Handle, 5...
...Grip, 5a...Gripping part, 5b...Space part,
5c...Vacancy, 5d...Mounting part, 5e...Thin wall part, 5f...Fitting part, 5g...Communication part, 5h
...Opening, 6...Hanging fitting, 7...Sealing material, 8...
...Tightening band, 9...Bolt/Nut, 10...
Grip, 10a...Gripping part, 10b...Space, 10c...Empty room, 10d...Mounting part, 10e
...Thin wall part, 10f... Fitting part, 10g...
...Communication portion, 11...Sealing material, 12...Blind plug, A
...Liquids such as oil.

Claims (1)

[Scope of utility model registration request] Grips 5, 10 fixed to agricultural and forestry equipment driven by engines 2, 2', etc. are formed in a cylindrical shape from an elastic material such as rubber, and spaces 5b are provided in gripping parts 5a, 10a of the grips 5, 10. , 10b are provided, and the liquid A such as oil is filled in the space portions 5b, 10b, and the grip portions 5a, 1
A part of the wall forming the spaces 5b and 10b excluding the space 0a is formed into a thin wall, and when vibration is transmitted to the gripping parts 5a and 10a of the grips 5 and 10, the liquid A absorbs this vibration. A grip structure for agricultural and forestry equipment, characterized in that the thin wall portions 5e and 10e are slightly oscillated in response to pressure to absorb the vibrations.