JP4146819B2 - Polishing disc for hand grinder - Google Patents

Description

  The present invention relates to an abrasive disc for use in a handheld grinder.

  The hand-held type grinder is provided with a rotating shaft serving as a screw shaft at the tip of a main body incorporating a motor, and a polishing disk or other rotating grindstone is mounted on the rotating shaft.

  As a specific shape of the polishing disk, Japanese Patent Application Laid-Open No. 9-174444 (Patent Document 1) discloses that a polishing portion is provided on one surface of a support base having an attachment hole for attachment to a rotating shaft of a rotary tool body at a central portion. The polishing part is arranged in a radial state in a state where a large number of polishing cloths are inclined and a part of the polishing cloth is polymerized, and is pressed with high pressure, and the adhesive is applied to the substrate in a polymerized state. Abrasive discs that are bonded together are disclosed.

  In JP-A-11-19876 (Patent Document 2), an elastic grindstone base material formed by solidifying a plain weave glass fiber with a resin on one surface of a support base provided with a mounting hole at the center has a large center. An abrasive disc bonded in a ring shape is disclosed.

  Japanese Patent Laid-Open No. 2002-36127 (Patent Document 3) discloses a polishing disk in which a polishing portion obtained by gradient polymerization of the polishing cloth is bonded to the front and back of a support base.

JP-A-9-174444. Japanese Patent Application Laid-Open No. 11-19876. Japanese Patent Laid-Open No. 2002-36127.

  The means for attaching the abrasive disc is to attach a washer body (receiving member) to the rotating shaft of the machine body (rotating tool body), insert it through the mounting hole of the disc support base, and attach a tightening nut to the rotating shaft. The polishing disk is fixed to the rotating shaft by screwing, and the entire disk is replaced when the polishing portion is worn.

  Therefore, the replacement work is complicated, and as described above, the polishing part of the conventional polishing disk employs a gradient polymer of polishing cloth or a member obtained by solidifying plain weave glass fiber with a resin, such as metal surface polishing. This is inconvenient for a soft object such as wood, which is immediately clogged, and is also expensive as a consumable item.

  Accordingly, the present invention proposes a novel polishing disk composed of a rotary shaft mounting body and a polishing body that are detachable.

  The polishing disk according to the present invention is provided with a mounting screw hole to the rotating shaft in the upper part of the base part having an appropriate cushion function, and provided with an entangled surface formed by a number of hook-shaped small protrusions on the bottom surface A rotating shaft mounting body and a polishing body having a back surface formed of a cloth surface that can be entangled with the entangled surface and a surface formed by attaching abrasive grains. It is.

  Thus, the rotating shaft mounting body is screwed onto the rotating shaft (screw shaft) of a handy-type rotary tool body (machine body) that is commercially available, and the abrasive body is fixedly attached to the tangling surface of the rotating shaft mounting body. However, when the machine is driven, it is possible to perform polishing work on the file surface, and when the file surface of the abrasive body wears off, the abrasive body is peeled off, and if it is replaced with a new one, polishing work can be performed again. Become.

  The present invention has the above-described configuration, and can be attached to the airframe simply by attaching the rotating shaft mounting body to the rotating shaft of the airframe without the need for a washer body or a tightening nut. In this wear, the polishing body can be peeled off and a new polishing body can be attached (entangled), and the polishing part can be easily replaced.

  Next, an embodiment of the present invention will be described. The polishing disk shown in the embodiment is composed of a rotating shaft mounting body A and a polishing body B.

The rotating shaft mounting body A is an integrated stacking unit 1, base unit 2, and entangled unit 3, and the mounting unit 1 projects a hexagonal nut body 12 having a mounting screw hole 11 at the center of the upper end. While holding, a pair of parallel outer peripheral surfaces of the hexagon nut body 12 are exposed to embed the other peripheral surface as a tool receiving surface 13 and are integrally formed into a lower portion and a disk shape. . The base portion 2 is bonded to the bottom surface of the mounting portion 1 and is formed of a foamed resin having a predetermined thickness and provided with appropriate cushioning properties. The entangled portion 3 is a thin plate provided with a number of hook-shaped small protrusions such as Velcro (registered trademark), and is bonded and fixed to the bottom surface of the base portion 2.

  The abrasive body B has a so-called sandpaper-like shape, the back surface is formed of a cloth surface 4 that can be entangled with the entangled portion 3, and the surface is a filed surface 5 formed by adhering abrasive grains. is there.

  Thus, although it is used as a kind of attachment of an existing handy type grinder (rotary tool: machine body) C that is commercially available, the machine body C includes a protective cover 6 when other members are used. Therefore, as illustrated in FIG. 3, the protective cover 6 is removed, and the rotary shaft mounting body A is screwed to the rotary shaft 7.

  And then, because the polishing body B is fixed by being attached (entangled) to the entangled surface (entangled portion) of the rotary shaft mounting body A, as illustrated in FIG. Polishing work on the file surface of the polishing body B is possible. When the file surface of the polishing body B is worn or clogged, the used polishing body is peeled off and replaced with a new polishing body, so that the polishing work can be performed again.

1 is an overall perspective view of an embodiment of a polishing disk of the present invention. The perspective view of the rotary tool main body of the use object of the grinding | polishing disc of the same invention. Explanatory drawing of the removal state of the protective cover at the time of the same use. Installation explanatory drawing of the polishing disc. Explanatory drawing of the state for use at the same time.

Explanation of symbols

A Rotating shaft mounting body 1 Mounting portion 11 Mounting screw hole 12 Hexagon nut body 13 Tool receiving surface 2 Base portion 3 Entangled portion B Polishing body 4 Fabric surface 5 File surface C Rotating tool body (machine body)
6 Protective cover 7 Rotating shaft

Claims (1)

It consists of a rotating shaft mounting body and an abrasive body. The rotating shaft mounting body is a tool receiving surface with a hexagonal nut body with mounting screw holes exposed, and the other peripheral surface is embedded. A mounting part produced by integrally forming the lower part in a disk shape, projecting and holding at the center of the upper end, a base part formed of a disc-shaped foamed resin with a predetermined thickness so as to have appropriate cushioning properties , and a lower bottom surface The cloth surface is formed by laminating and integrating a circular thin plate-shaped entangled portion provided with an entangled surface formed by a large number of hook-shaped small protrusions, and the back surface can be entangled with the entangled surface. A hand grinder polishing disk, wherein the surface is a filed surface formed by adhering abrasive grains.

Images