JPH0511965Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a polishing tool in which a large number of polishing sheets (made of paper or cloth with abrasive grains on one side) are arranged radially.

[Conventional technology]

As shown in Figures 4 and 5, the conventional technique for polishing tools in which a large number of polishing sheets are pasted in a radial manner on a disc is a disc that is bent in half so that the abrasive grains on one side are located on the surface. Multiple polishing sheets 1
1 are arranged radially such that the bent line is located on a radial line and the bent portion fits between the two opposing pieces as they are bent, and has a drive shaft through hole 12 in the center. . ing.

[Problem to be solved by the invention] The inner periphery of each polishing sheet arranged radially is interposed between the outer periphery of two stacked disks, and the polishing sheet is supported on the disk by adhesive and nail driving. As a result, during the fixing operation, the radially arranged abrasive sheets shift and become irregularly spaced, which leads to problems such as the production of defective products and a weak supporting force of the abrasive sheets.

In addition, the disk is provided with claws, and these claws are pressed into the abrasive sheet, which is time-consuming and time-consuming to manufacture.
There was a problem that caused the cost to rise.

[Means to solve the problem]

In order to solve the above problems, this invention consists of a disk that has a through hole for the drive shaft in the center and radial slits that point toward the center from equidistant positions on the outer periphery, and one side with abrasive grains on the front side. The bent part of the abrasive sheet is inserted into each of the above slits, and the back side of both sides sandwiching the bent part of the abrasive sheet is inserted into a disk and the overlapping part of the surface of the previous abrasive sheet. It is constructed by pasting it on with adhesive.

[Effect]

A polishing tool is attached to the drive shaft of a hand grinder, and while driving the polishing tool, both sides of the groove are polished using both sides of the polishing tool.

〔Example〕

In the figure, 1 is the drive shaft through hole 2 in the center.
This disc 1 is provided with slits 3 arranged radially from positions at equal intervals on the outer periphery toward the center inward.

Reference numeral 4 denotes a number of polishing sheets folded in half so that the abrasive grains on one side are on the front side, and these polishing sheets 4 are inserted into each slit 3 sequentially with the folded bent portion on both sides and at the tip of the disk. The back surfaces of both sides of the polishing sheet 4 inserted later are overlapped with parts of the surfaces of both sides of the polishing sheet 4, and the overlapping portions are fixed with an adhesive 5 interposed therebetween.

Note that the disc 1 is made of metal, fiber, or the like.

Further, the two-fold bending line of the polishing sheet 4 is positioned in the direction of rotation of the disc 1.

Furthermore, an adhesive, synthetic resin, or the like may be filled between the opposing back surfaces of both pieces of the polishing sheet 4 that protrude from the outer peripheral edge of the disc 1 (not shown).

At this time, abrasive grains may be mixed into the adhesive or synthetic resin.

〔effect〕

As described above, according to the polishing tool of this invention, since the bi-folded bent portion of each bi-folded abrasive sheet is inserted into each slit of the disc, the arrangement of each abrasive sheet is accurate, and each The bearing capacity of the abrasive sheet can also be significantly increased.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the attachment of the abrasive sheet to the abrasive tool according to this invention, Fig. 2 is a plan view of the abrasive sheet attached to the disc, Fig. 3 is a vertical cross-sectional end view of the same, and Fig. 4 is a conventional abrasive tool. A plan view of the polishing tool, and FIG. 5 is a longitudinal sectional front view of the same. 1... Disk, 2... Through hole, 3... Slit,
4... Polishing sheet.

Claims (1)

[Scope of utility model registration request] It consists of a disk that has a through hole for the drive shaft in the center and radial slits that point toward the center from equidistant positions on the outer periphery, and an abrasive sheet that is folded in half so that the abrasive grains on one side are on the front side. A polishing tool in which the folded bent part of the polishing sheet is inserted into each of the above slits, and the back sides of both sides sandwiching the bent part of the polishing sheet are attached to the disc and the overlapping part of the surface of the previous polishing sheet via adhesive.