JPS61146476A - Flat rotary abrasive disc fitted with abrasive paper - Google Patents

Abstract

PURPOSE:To facilitate the attachment or detachment of abrasive paper to or from a disc body, by installing an air suction hole, attracting the abrasive paper to an upper surface of the rotary disc body with air suction pressure, in this upper surface. CONSTITUTION:With drive of a motor 9, an air discharge piece 1 is rotated together with disc bodies 2 whereby air inside these upper and lower double- sheet disc bodies 2 is made into suction pressure. With an effect of this suction pressure, air comes to be inhaled inside from an air suction hole 4 installed in the upper disc 2 in consequence, so that abrasive paper 8 is attracted to this upper disc body 2 by suction force. When rotation of these disc bodies 2 goes high, a degree of coherence of the abrasive paper to these disc bodies 2 grows larger, whereby even if a cutter is applied to the paper 8, its rotation is in no case stopped, thus the abrasive paper 8 grinds the center. When this abrasive paper 8 is removed for replacement, rotation of the motor 9 is stopped, and suction action by the air suction pressure is released whereby the abrasive paper 8 is easily detached from these disc bodies 2.

Description

DETAILED DESCRIPTION OF THE INVENTION The invention relates to a device for mounting abrasive paper on a planar circular rotary disk attached to a motor shaft.

As the quality of the abrasive paper has improved, more and more tools are using it for sharpening knives.In this case, the abrasive paper is placed on top of a rotary disk, but conventionally adhesive tape or Velcro was placed behind the abrasive paper. It is a 51CL that is attached to a rotating table and will not fall off even if you rotate it.

The adhesive tape type is easy to adhere to, but very difficult to remove, and the Velcro type has a loose abrasive paper surface.
There were dents and sagging, which caused problems with polishing accuracy. Also, since it is a dry polishing method, the generation of frictional heat due to high speed rotation cannot be avoided, which has the disadvantage of damaging the material of the blade. The abrasive paper itself is easily scratched, and as a consumable item, it is desirable to replace it with a new one as often as possible, so it is not a good idea to use something expensive.

The present invention aims to obviate the above-mentioned difficulties and drawbacks.

To explain the embodiment of the present invention, a rotary disk body 2 of a predetermined size is provided with air discharge pieces 1 provided radially inside two flat circular disks (upper and lower), and a large number of air discharge pieces 1 are attached to a circular disk 3 serving as the upper surface. An air suction hole 4 is formed in the rotary disk body 2, and a through hole 6 through which a motor shaft 5 passes is formed in the center of the rotary disk body 2 at the top and bottom. When attaching the rotary disc body 2 formed in this way to the motor shaft 5, the tip 7 of the shaft should slightly protrude above the disc 3, and a circular abrasive paper 8 with a hole to be fitted thereon should be placed on the top surface. It is placed on a circular disk 3.

To explain the present invention in detail, when the motor rotates, the air release piece 1 also rotates together with the disc body 2 through the shaft, and the air inside the two upper and lower discs becomes negative pressure. Air is sucked into the interior through the air suction hole 4 of the circular disk 3, and the abrasive paper 8 is adsorbed to the circular disk and breaks. As the rotation speed increases, the degree of adhesion increases, and even if the abrasive paper 8 is applied with a knife, the rotation of the abrasive paper 8 does not stop and a predetermined abrasive work can be performed. In this case, even when a circular disc with holes for appropriate air flow is combined with a propeller system underneath, this negative pressure effect may also occur.

In this invention, as described above, since the abrasive paper 8 is attracted and rotated by the negative pressure of air, there is no need for a device to attach it to the back side.
Ordinary abrasive paper is sufficient for the purpose, and the abrasive paper used is a low-cost consumable item. Furthermore, since the polished surface becomes a uniform plane, the precision of the polishing work is increased. If the rotation of the motor is stopped, replacing the abrasive paper 8 becomes really easy. Furthermore, the theoretical effects of polishing are also demonstrated.

Since the abrasive paper 8 rotates only by the suction force due to the negative pressure of air, if the knife is pressed against it more strongly than necessary, the abrasive paper 8 will slide on the circular disc and stop rotating.

This is a warning that you should not apply more polishing pressure than necessary.9 Highly accurate polishing work is possible. Scissors used for everyday hair cutting, etc., have to be resharpened when the blade is damaged by just a few microns or tens of microns, but repair polishing of this degree is extremely difficult for the abrasive surface. Light contact pressure is enough to regenerate the blade. Excessive sharpening pressure will only sharpen the blade in vain and increase the size of the sharpened blade, but there is no benefit. Therefore, by stopping the abrasive paper from rotating 80 times, or by minimizing the size of the blade, a superior blade can be made. Moreover, there is no damage to the material of the blade due to frictional heat.

[Brief explanation of the drawing]

Figure 1 is a perspective view of an embodiment of a flat rotary abrasive disc equipped with a part of abrasive paper cut out. Figure 2 is a plan view of a rotary disc body with a part cut out.

Claims (1)

[Scope of Claims] 1. A rotary disc body consisting of two pieces of a predetermined size that has air discharge pieces radially inside thereof, an appropriate number of air suction holes are provided in the upper circular disc, and an appropriate number of air suction holes are provided in the upper circular disc. A flat rotating abrasive disk made of circular abrasive paper of the same size. 2. A plane according to claim 1, in which two rotating disks of a predetermined size, each having radial air release pieces inside, are combined with a propeller system on the lower side of one disk. Rotating polishing disk.