JP2567255Y2 - Polishing / light grinding sander - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polishing / light grinding sander used by being attached to a hand-held grinder.

[0002]

2. Description of the Related Art Conventionally, when removing rust, it has been common practice to remove rust by holding sandpaper in a hand, but in the case of using sandpaper, it is necessary to rely on manual work. The work is complicated.

On the other hand, in heavy grinding, it is common practice to attach a grinding sander to a hand-held grinder and press it against a grinding portion while rotating it.

[0004]

[Problems to be Solved by the Invention] When performing rust removal, it is proposed that a circular sandpaper be sandwiched between rubber pads and attached to a hand-held grinder to mechanically remove rust. According to the method, there is a problem that the sandpaper is too soft and is inconvenient to use, and the fibers of the sandpaper are frayed and hinder the work.

[0005] In view of the above problems, the present invention provides a sanding / light grinding sander that can be easily polished and lightly ground with a hand-held grinder and that does not cause fraying of sandpaper fibers. As an issue.

[0006]

There SUMMARY OF THE INVENTION The polishing and light grinding sander according to the present invention is rotated by a hand-held grinder, pressed obliquely to be polished ground surface, while deflected by surface contact polishing · the sander to perform a light grinding, preparative
Flexible disk is made by impregnating resin into cardboard
And can be directly mounted on the drive shaft of a hand-held grinder
, And the the mounting disc adhesive to the substantially entire surface is applied, to name a substantially the same diameter disk-shaped and the mounting disc thereon, the base fabric
Spray a mixture of abrasive grains and binder
It becomes sandpaper, or long fiber non-woven cloth made by firing impregnated with abrasive grains, characterized in that it is stuck with its entire surface.

The mounting disk is manufactured by impregnating resin into cardboard.
Is, as long as it has flexibility, for example, Toyo fiber manufactured fiber (trade name) can be used. For light grinding, spray a mixture of abrasive grains and a binder on the base cloth.
A long-fiber nonwoven fabric impregnated with baked sandpaper or abrasive grains, for example, impregnated with sand, is used. In the case of polishing, especially light polishing, a short-fiber nonwoven fabric (felt) or leather can be used. . This polishing / light grinding disk may be adhered to only one surface of the mounting disk, but it is preferable to adhere to both front and back surfaces in consideration of usage efficiency. The adhesive may be applied directly to the mounting disk, or a commercially available double-sided adhesive tape (for example, a double-sided adhesive tape manufactured by Nitto Tape Co., Ltd.) may be used. As the pressure-sensitive adhesive, the same material as the pressure-sensitive adhesive of the double-sided adhesive tape can be used, but a non-curable adhesive may be used. As the hand-held grinder, either a motor-driven grinder or an air-driven grinder (product name: air sander) can be used.

[0008]

According to the present invention, a disc-shaped sandpaper, a long-fiber nonwoven fabric impregnated with abrasive grains and fired are adhered to a soft mounting disc with an adhesive to increase flexibility as a whole. Since it is applied, polishing and light grinding such as rust removal can be performed in the same manner as when sandpaper is used alone. Further, since the sandpaper is supported by the mounting disk, although it has flexibility, it can be directly mounted on the drive shaft of the hand-held grinder using a lock nut or the like.

Moreover, since almost the entire surface of the sandpaper or the like is stuck to the mounting disk, no fraying of the fiber or the like occurs, smooth polishing and light grinding can be performed, and the operability is good. The load is distributed over the entire surface of the mounting disk and sandpaper etc. can be prevented from peeling off, ensuring high safety.
Ku, the usefulness of that is very large.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to specific examples shown in the drawings. 1 to 3 show a polishing / light grinding sander according to an embodiment of the present invention. In the figure,
The light grinding sander 1 is configured such that a disk-shaped sandpaper 3 is fixed to both front and back surfaces of a mounting disk 2. Mounting disk 2 is 4
It is manufactured by impregnating a resin into a cardboard having a diameter of 0 to 200 mm, for example, 100 mm, and has a mounting hole 3a in the center of the mounting disk 2 and the sandpaper 3 (however, the mounting hole of the mounting disk 2 is not shown). Is formed, and the rotation shaft G1 of the hand-held grinder G is inserted into the mounting hole 3a and can be fixed with the lock nut N. For example, a product (trade name: fiber) manufactured by Toyo Fiber Co., Ltd. can be used for the mounting disk 2. In addition, it can also be mounted on the grinder G while being held between rubber pads. Further, as a mounting method, a slit may be formed in the peripheral edge of the mounting hole of the sander 1 and mounted in an offset manner using a dish-shaped lock nut (FIG. 3 shows a state in which the mounting is performed in an offset manner).

On the other hand, the sandpaper 3 is manufactured by spraying and baking a mixture of gold and sand (other abrasive grains, for example, diamond abrasive grains and ceramics abrasive grains) and a synthetic resin binder on the surface of the base cloth, and the grain size of the gold sand is covered. It is set appropriately depending on the type of the abrasive. A double-sided adhesive tape 4 of the same diameter is attached to the entire front and back surfaces of the mounting disk 2, and the disk-shaped sandpaper 3 is attached to the double-sided adhesive tape 4. The double-sided adhesive tape 4 is obtained by applying a pressure-sensitive adhesive to the front and back surfaces of the tape and pasting a release paper on the adhesive tape. And sandpaper 3 can be attached by peeling off the other.

When the polishing / light grinding sander 1 of this embodiment is used, as shown in FIG. 2, the rotation axis G1 of the hand-held grinder G is inserted into the mounting disc 3 and the mounting hole 3a of the sandpaper 3.
, And the lock nut N is screwed into it. Since the sandpaper 3 is supported by the mounting disk 2, the sanding / light grinding sander 1 can be directly set on the grinder G.

When polishing or lightly grinding, hold the grinder G in hand and tilt the tip side downward, rotate the sandpaper 3 by operating the built-in motor, and grind the sandpaper 3 so that the tip side of the sandpaper 3 contacts. Lightly press against surface W. Then, as shown in FIG. 3, since the polishing / light grinding sander 1 has flexibility as a whole, the outer peripheral edge portion of the polishing / light grinding sander 1 bends, and the polishing / light grinding sander 1 is in soft contact with the ground surface W to be polished. However, the grinder G can be moved back and forth and left and right to perform efficient polishing and light grinding. Further, even if force is applied to the hand holding the grinder G, the polishing / light grinding sander 1 is deformed and absorbs excessive force, so that the usability is good. In addition, according to the experiments of the present inventors, it was found that the sandpaper 3 can be used sufficiently for heavy grinding in addition to polishing and light grinding. In addition, polishing
Friction heat was generated during the light grinding operation, and the sander 1 became soft, but no peeling or the like was observed, indicating that desired polishing / light grinding performance was obtained.

Also, since the sandpaper 3 is stuck on both sides of the mounting disk 2, when the outer edge of the sandpaper 3 on one side is worn, the sander 1 is turned over and attached to the grounder G, and the outer edge is worn. Then, the base cloth is cut off at a predetermined size, and polishing and light grinding can be performed using a new outer peripheral edge. At that time, the outer end surface of the base cloth is pressed against an endless belt type polishing machine or the like to remove a worn portion,
That is, dressing can also be performed, but in that case, the thickness of the base cloth is increased and the usability is further improved.

Further, since the entire surface of the sandpaper 3 is adhered to the mounting disk 2, there is no occurrence of peeling of the sandpaper 3 or fraying of the fibers of the base cloth during polishing and light grinding. Can guarantee safety.

FIG. 4 shows a second embodiment of the present invention. In the present embodiment, a long-fiber nonwoven fabric 5 which is impregnated with quartz sand and fired is used instead of the sandpaper 3.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a sander for polishing and light grinding according to an embodiment of the present invention.

FIG. 2 shows the above sander for polishing and light grinding using a grinder G.
FIG. 4 is a perspective view showing a state where the device is attached to the device.

FIG. 3 is a diagram showing a use state of the polishing / light grinding sander.

FIG. 4 is a perspective view showing a sander for polishing and light grinding according to another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Polishing and light grinding sander 2 Mounting disk 3 Sandpaper 4 Double-sided adhesive tape (adhesive) 5 Long-fiber nonwoven fabric impregnated and burned with porcelain sand G Grinder

Claims (1)

(57) [Scope of request for utility model registration] 1. A to rotate in a hand-held grinder, pressed obliquely to be polished ground surface, a sander which performs grinding and light grinding with surface contact flexes, mounting discs
Manufactured by impregnating resin into cardboard, it is flexible and hand-made
Is attachable directly to the drive shaft have grinder, the mounting disk adhesive to the substantially entire surface is applied, to name a substantially the same diameter disk-shaped and the mounting disc thereon, the abrasive to the base fabric Grains and bi
The mixture blown with sandpaper formed by baking with Nda, or long fiber non-woven cloth made by firing impregnated with abrasive grains
There polishing and light grinding sander, characterized in that is stuck in its entire surface.