JPS5841110Y2 - Anti-vibration support handle for hand-held power tools - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a support bundle in a micro-vibration air tool such as a portable grinder.

For porta-pull air tools that require support with both hands to perform the intended work, one hand is usually used to hold the grip, which also functions as the drive air supply valve operating part, and the other hand is used to hold the The tool is operated by grasping the auxiliary bundle in order to orient the tool in an articulated position with respect to the workpiece, but for example, as with a grinder, the work is performed by pressing the rotary whetstone correctly against the workpiece surface. Therefore, when using the auxiliary bundle while holding it in a stable state above the whetstone, the exhaust from the air motor and the reaction caused by the high speed rotation of the whetstone, especially the auxiliary support bundle. Micro-vibrations are propagated continuously, which causes fatigue to the user when working continuously for a long time, and vibrations can cause trouble when handled professionally, which is unfavorable in terms of occupational safety and health.

Therefore, in recent years, there has been a strong desire for measures to eliminate obstacles to workers caused by vibrations in hand-held tools, and anti-vibration bundles and the like are being developed even for pneumatic tools.

However, it is not easy to reliably support tools with considerable weight while also limiting the propagation of the generated vibrations to the human body. If a vibration means were to be used, the structure would become complicated and expensive, and there would be secondary problems such as reduced durability, and there is still no sufficient countermeasure.

In view of the current situation, the present invention has an extremely simple structure without complicating the structure, transmits less vibration than conventional ones, has a high vibration-proofing effect, is highly durable, and is inexpensive. The present invention proposes an anti-vibration support bundle that can be provided.

In the present invention, a coil spring is formed with a tightly wound part of an appropriate length only at the base end, and is wound at an appropriate pitch in the required section.
For installation with a flange, screw the base end onto the outer periphery of the metal fitting.
On the outer periphery of such a coil spring, a grip tube made of a soft rubber material and closed at one end is closely fitted with the coil spring to form an integrated grip handle, and the mounting is performed by connecting the center screw hole of the metal fitting to the tool body. The gripping handle is fixed by screwing onto screw shafts protruding from key points.

Below, the present invention will be described in detail with reference to drawings regarding one embodiment.
The one shown in FIG. 1 is a specific example when used in an air grinder, in which a support grip handle 10 is attached to one side of the head portion 2 of the tool body 1 on an extension line passing through the rotation axis of the rotary grindstone 3. This is what is being done.

As shown in FIG. 2, this supporting gripping handle 10 is fixed by screwing a central screw hole 12 onto a screw shaft 4 which projects from the head portion 2 boss 2' of the tool body 1 by an appropriate length. The metal fitting 11 has a flange 11' at the outer end, and spiral grooves 11'' are carved at the required pitch on the outer periphery. A coil spring 13 wound to a required length by closely screwing only the base end into the outer circumferential spiral groove 11'' of 11 is fixed, and the coil spring 13 is formed of a soft rubber material that is closely attached to the outer periphery with this coil spring 13 as the core. A grip tube 14 of an appropriate thickness is fitted therein.

The grip tube 14 has its tip closed as shown in the figure, and has a non-slip groove 14' on its outer periphery.

Since the gripping handle of the present invention is constructed as described above, the coil spring 13 serving as the core maintains the supporting force as the handle 10, and since its base end is fixed to the metal fitting 11, it is attached to the tool body 1 side. The vibration generated in the installation is transmitted from the fitting 11 to the coil spring 13.A grip tube 14 is fitted onto the outside of the coil spring 13, and the grip tube 14
Since it is made of a soft rubber material, slight vibrations are caused by the combined elasticity of the spring 13, which is made of a single wire wound at an appropriate pitch, and the hollow soft rubber grip tube 14 that is placed over the spring 13. As a result, the vibrations generated within the tool body or by the rotational drive part of the tool are reduced in the order of transmission and are hardly transmitted to the hand holding the tool, thus eliminating the problems caused by minute vibrations that conventionally occurred during use. It has now become possible to obtain a support handle that exhibits a vibration-proofing effect without causing fatigue to the user during long-term use.

Although the above description discloses the case where the present invention is used in an air grinder, it goes without saying that the present invention can also be applied to other air tools or electric tools.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a plan view of the device adopted in an air grinder, and FIG. 2 is a longitudinal sectional view. 1... Tool body, 2... Head part,
4... Screw shaft, 10... Support gripping handle,
11...Mounting with metal fittings, 11'...Tsuba,
11"...Spiral groove, 12...Screw hole,
13... Coil spring, 14... Gripping tube.

Claims (1)

[Scope of utility model registration request] For close winding of an appropriate length only on the base end, a coil spring is wound at an appropriate pitch, and for installation with a flange, the base end is screwed and fixed on the outer periphery of the metal fitting. A gripping tube made of a soft rubber material and closed at one end is closely fitted with the coil spring to form an integrated gripping handle, and the mounting is done by protruding the central threaded hole of the metal fitting at a key point on the tool body. A vibration-proof support bundle for a hand-held movable crab tool, characterized in that the gripping handle is fixed by being screwed onto a screw shaft.