JPH018288Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a rotating grindstone mounting device, and more particularly to this type of mounting device having earthquake-proof properties.

Conventional technology Hand-type disc grinders used for free grinding work are designated as vibrating tools, and preventive measures have been taken to prevent this, but at present, rubber material is used as a cushioning material on a portion of the fixed flange of the grinder. It is pasted in a ring shape. Since the rotary grindstone is fastened to the grinder rotating shaft which is directly connected to the grinder through the fixed flange and the movable flange, vibrations during use are transmitted to the grinder.

Problems to be Solved by the Invention Conventionally, a grinder and a rotary grindstone are attached to the drive rotating shaft of the grinder using a movable flange. Therefore, the vibrations of the whetstone are directly transmitted through the rotating shaft of the grinder to the grinder itself, and are directly transmitted to the human body, where the human body is affected by the vibrations, which is thought to be the cause of white wax disease, which is a problem today. There is.

The present invention was made with the aim of eliminating these conventional problems.

Means for Solving the Problems The present invention involves molding a pad that backs up the back surface of a rotary grindstone from an elastic molded material, and attaching a nut member screwed onto the rotating shaft of a disc grinder at the center of the back surface of this elastic pad. In addition, in the center of the surface, the bolt members that are loosely inserted into the mounting holes of the rotary grindstone are individually buried and fixed while being separated by the elastic layers that make up the pad, and the bolt members are stretched outward from the buried ends of both members. The strength of the elastic pad is strengthened by the protruding portion, and a tightening fitting having a tightening flange for tightening the rotary grindstone between the bolt member and the pad is screwed into the bolt member of the elastic pad through the central screw hole. The present invention relates to a rotating grindstone mounting device characterized in that it is configured as follows.

Effects According to the mounting device according to the present invention, the rotating shaft of the grinder and the mounting shaft (bolt member) of the rotary whetstone are edged by the elastic layer that constitutes the pad, so that problems caused by unbalanced weight of the rotary whetstone, etc. The elastic layer between the shafts can efficiently absorb and alleviate the vibrations caused by the shaft, and the amount of vibration transmitted to the rotating shaft and the tool body directly connected to it is therefore significantly reduced, demonstrating a high degree of earthquake-proofing effect. obtain.

Furthermore, in addition to its original function as a pad, the elastic pad also functions as a buffer member due to its elasticity, and as a fixed-side tightening member due to the reinforcement of the internally buried overhang, and this multi-functionality simplifies the structure and facilitates installation operations. simplification can be achieved.

Embodiment An embodiment of the present invention will be described below based on the accompanying drawings.

In the mounting device according to the present invention, the rotary grindstone a
The pad 1 for backing up the pump is made of an elastic molded material, such as natural or synthetic rubber, or other plastic having appropriate elasticity, so that it can also function as a buffer member.

At the center of the back surface of the elastic pad 1 is a nut member 2 that is screwed onto the rotating shaft b of the hand-type disc grinder, and at the center of the surface is a bolt member that is loosely inserted into the mounting hole a ₁ at the center of the rotary grindstone a. 3 are embedded and fixed in a state separated by elastic layers 11 constituting the pads.

The nut member 2 and the bolt member 3 have disk-shaped overhanging parts 21 and 31 on their buried end sides, and these overhanging parts 21 and 31 not only function as a retainer but also serve as reinforcing members for the elastic pad 1. also works. These members 2 and 3 are generally made of metal, but may be made of hard plastic in some cases.

As shown in FIGS. 2 and 3, notches 211 and/or holes 311 can be formed in the overhanging parts 21 and 31 in order to strengthen the bonding strength with the elastic pad 1, and the weight balance is taken into consideration. Then up and down,
It is preferable that they are formed symmetrically in the left and right directions.

The bolt member 3 of the elastic pad 1 has a
A clamping fitting 4 having a tightening flange 41 for tightening and fixing the rotating whetstone a between them is screwed into a central threaded hole 42, and this fitting 4 has a mounting hole for the rotating whetstone a, as in the conventional product. A pilot part 43 can be formed to be fitted into _a1 . A buffer material layer 44 can be integrally laminated on the contact surface of the clamping fitting 4 with the rotating grindstone a, for example, the lower surface of the clamping flange 41 and the outer peripheral surface of the pilot part 43. As the cushioning material, for example, a rubber material can be used. Although an offset type rotary grindstone a is shown in the figure, it may also be a flat type.

FIG. 1 shows how the rotary whetstone a is installed, and the rotary whetstone a is fastened and fixed between an elastic pad 1 and a fastening fitting 4. As shown in FIG. The strength of the elastic pad 1 is strengthened by the overhanging parts 21 and 31 extending outward from the buried ends of the members 2 and 3, and it can also function as a fastening member on the fixed side, so it can be used as a fastening fitting. A stable and reliable installation state can be ensured by the moving tightening in step 4. In this way, between the elastic pad 1 and the fastening metal fitting 4, the rotating grindstone a
By screwing the elastic pad 1 onto the rotary shaft b of the grinder using the nut member 2 on the back side thereof, the elastic pad 1 can be put into use as shown in FIG. 1. Incidentally, the rotary grindstone a may be attached to the elastic pad 1 after the elastic pad 1 is attached to the rotating shaft b.

When the rotary grindstone a is rotated in the state shown in FIG. 1, vibrations occur due to the unbalanced weight of the grindstone a.
In addition to being able to be absorbed and relaxed by the elasticity of the bolt member 3 and the nut member 2, vibrations can be absorbed and relaxed by the elastic layer 11 between the bolt member 3 and the nut member 2. Therefore, vibrations are almost not transmitted to the nut member 2 and the rotating shaft b screwed thereto. This eliminates the possibility of vibrations being transmitted to other areas, and it is possible to demonstrate a high degree of earthquake prevention performance. This seismic resistance can be further improved by providing a buffer material layer 44 on the contact surface of the fastening metal fitting 4 with the rotating grindstone a.

Effects In this way, in this invention, the rotating shaft of the grinder and the mounting shaft of the rotary grindstone are edged with an elastic layer, which provides a high degree of earthquake resistance, and the multifunctionality of the elastic pad makes it extremely simple in terms of structure. This has the advantage of providing a mounting device with a simple structure and a high degree of earthquake resistance.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention, FIG. 2 is a plan view of the nut member shown in FIG. 1, and FIG. 3 is a plan view of the bolt member. In the figure, 1 is an elastic pad, 2 is a nut member,
3 is a bolt member, and 4 is a tightening metal fitting.

Claims (1)

[Scope of utility model registration request] A pad that backs up the back surface of the whetstone is molded from an elastic molded material, and a nut member that is screwed onto the rotating shaft of the disc grinder is attached to the center of the back surface of this elastic pad, and a nut member that is screwed onto the rotating shaft of the disc grinder is attached to the center of the surface of the pad, and a nut member is attached to the mounting hole of the rotary whetstone at the center of the surface. The loosely inserted bolt members are buried and fixed individually while being separated by the elastic layers that make up the pads, and the strength of the elastic pads is strengthened by the overhanging portions that extend outward from the buried ends of both of the bolt members. A rotating grindstone mounting device characterized in that a tightening fitting having a tightening flange for tightening the rotating grindstone between the bolt member of the elastic pad and the pad is screwed into a central screw hole. .