JPH0715729Y2 - Rotary whetstone - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary grindstone fitted and attached to a grindstone rotation driving shaft of a grinder at a grindstone central hole. Referred to in the present specification, the term "grinding wheel" is, Migaku Ken,
The concept includes an offset type rotary grindstone for grinding, a flat type rotary grindstone for cutting, a rotary disc for polishing, a rotary grindstone of sandpaper arrangement for grinding, and the like.

[0002]

2. Description of the Related Art Taking an offset type polishing wheel, a grinding wheel for grinding, and a flat type grinding wheel for cutting as an example, these wheels usually have an outer diameter, an inner diameter and a thickness of a hole through which a rotary shaft of a grinder is passed. This is a factor that determines the grindstone size. According to the JIS standard, the inner diameter of the central hole is also determined according to the outer diameter of the grindstone. For example, for a grindstone with an outer diameter D of 100 mm, the inner diameter H of the central hole is H = 15.00 mm.

On the other hand, a grinder generally available has a shaft 52 for rotating a grindstone protruding from a grinder main body 51, as shown in FIG. Nut 5
3 can be screwed. A flange 51a and a grindstone guide portion 54 called a pilot are provided in a portion near the base of the shaft 52, and the outer diameter of the guide portion is determined so that the central hole of the rotary grindstone fits therein. On the other hand, the nut 53 is also provided with a grindstone guide portion 55 on one side thereof,
The outer diameter of this portion is also determined so as to fit in the central hole of the rotary grindstone.

In the offset rotary grindstone and the flat rotary grindstone 6 described above, the central hole 61 is externally fitted to the guide portion 54 on the shaft, the nut 53 is screwed to the shaft 52, and the guide portion 55 is formed in the central hole of the grindstone. It is fitted into 61 and tightened. Thus, the grindstone 6 is accurately centered and attached to the shaft 52 for use.

When the grindstone 6 is thin, the guide portion 54,
The guide portion 5 of the nut 52 so that the 55 does not collide.
5 is directed to the side opposite to the grindstone 6, and the nut flat surface 53a is applied to the grindstone 6.

[0006]

The outer diameters of the guide portion 54 on the shaft of the grinder and the guide portion 55 on the nut are constant, and the hand grinders that are widely used at present have a diameter of 15 mm and a diameter of 16 mm. There is something. Therefore,
The rotary grindstone that can be directly attached to these must have an inner diameter of its central hole that matches these grinder sizes. Therefore, even when the inner diameter of the central hole is determined by the JIS standard depending on the outer diameter of the grindstone, if the outer diameter is 100 mm, which is the same size,
Even for whetstones that can be manufactured with the same mold, in order to accommodate users with a 15 mm grinder and users with a 16 mm grinder, separately manufacture a whetstone with a different center hole inner diameter, or for the larger 16 mm grinder When manufacturing the grindstone of the present invention and selling it to the user of the 15 mm grinder, it is necessary to provide the short tube adapter 7 (see FIG. 8) for filling the gap of 1 mm.

However, in order to correspond to the grinder of the user, when manufacturing the grindstones having different central hole inner diameters, it is necessary to prepare two kinds for at least a part of the manufacturing die, which increases the manufacturing cost. Further, it takes a lot of time and labor to sort the stock of grindstones having different inner diameters of the central hole. When the adapter as described above is provided, the cost is increased due to the production of the adapter.

Such a problem occurs not only in an offset type or flat type rotary grindstone, but also in a sandpaper type rotary grindstone. Then, this invention aims at providing the rotary grindstone which can solve the said problem even a little.

[0009]

According to the present invention, in accordance with the above object, a rotary grindstone fitted and attached to a grindstone rotary drive shaft of a grinder at a grindstone central hole is provided with a label on at least one side, and the label is the grindstone. A main body portion that is attached to the main body, a line portion that is continuous with the main body portion and that is arranged along the circumference of the central hole, and that can be broken or bent, and from the line portion to the center of the central hole The present invention provides a rotary grindstone having a central hole inner diameter adjusting piece of a predetermined thickness which projects.

Like the conventional grindstone label, the label is
A product name, a trademark, a grindstone size, a manufacturer name, etc. can be described.

[0011]

According to the rotary grindstone of the present invention, when it is used in a grinder having a shaft diameter or a pilot portion outer diameter on the shaft which exactly matches the inner diameter of the grinding wheel central hole, the user breaks the line portion of the label. Then, the central hole inner diameter adjusting piece can be removed and attached to the grinder.

When the grinder having a slightly smaller shaft diameter that does not match the inner diameter of the grinding wheel central hole or the pilot portion outer diameter on the shaft is used, the central hole inner diameter adjusting piece is moved into the grinding wheel central hole in the line portion of the label. Fold,
With the thickness of the adjusting piece, the gap between the shaft or the pilot portion on the shaft and the inner surface of the grindstone central hole can be filled and installed.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view of one embodiment, and FIG. 2 is XX of FIG.
Sectional views taken along the lines, and FIGS. 3 and 4 are explanatory views of the usage state. This rotary grindstone 1 is an offset type grindstone for polishing and grinding. The grindstone main body 2 is formed by mixing abrasive grains with a binder resin, molding the mixture, and firing the mixture. A glass cloth reinforcing material 21 is sandwiched inside. At the center, a central hole 22 that fits into the shaft for driving the grindstone of the hand grinder is formed, and this is reinforced by a washer 23. Body 2
Has an outer diameter of 100 mm, and the hole 22 has an inner diameter of 16 mm.

A label 3 is attached to the upper surface of the grindstone body 2 so as to surround the central hole 22. Although not shown on the surface of the label 3, the brand name, trademark, grindstone size,
The manufacturer's name etc. are printed in advance. The label 3 is made of a thin soft synthetic resin plate or a synthetic resin molded product, and its ring-shaped main body 31 is attached to the grindstone main body 2, and through the line portion 32 at a position that exactly matches the circumference of the grindstone hole 22. The central hole inner diameter adjusting piece 33 projects toward the center of the hole 22.
The main body portion 31, the line portion 32, and the adjustment piece 33 are integrally formed.

The line portion 32 is formed as a perforated line so that it can be broken or bent at this portion. There are a total of three adjusting pieces 33, each having a thickness of 0.5 mm, protruding from the line portion 32 by a width W of about 2 mm, and arranged at equal center angular intervals. The rotary grindstone 1 can be mounted on a hand grinder 4 and used as shown in FIGS. 3 and 4, for example.

That is, when the outer diameter of the pilot portion (grinding stone guide portion) 41a on the shaft 41 of the hand grinder 4 and the nut upper pilot portion 42a correspond to the central hole of the grinding stone having the inner diameter of 16 mm, it is shown in FIG. As described above, each adjustment piece 33 of the grindstone label 3 is broken and removed at the line portion 32, the grindstone central hole 22 is directly fitted to the pilot portion 41 a, and the nut 42 is used for tightening.

When the outer diameters of the shaft upper pilot portion 41a and the nut upper pilot portion 42a of the hand grinder 4 correspond to the center hole of the grindstone having the inner diameter of 15 mm, each adjustment of the label 3 is performed as shown in FIG. The piece 33 is bent at the line portion 32 into the central hole 22 of the grindstone, and the pilot portion 41a is fitted inside and is tightened with the nut 42. In this case, the thickness of the adjustment piece 33 of 0.5 mm is
Fill between the pilot parts 41a, 42a and the grindstone hole 22,
The entire grindstone 1 is centered on the shaft 41 and can be used smoothly.

The present invention is not limited to the above embodiment, but can be implemented in various other modes. The material of the label 3 may be a thin metal plate, paper, a laminate of a synthetic resin film or a metal film on one or both sides of a paper plate, or the like. Also, label 3
May be attached to the lower surface or the upper and lower surfaces of the grindstone body 2 as necessary.

The line portion 32 is not limited to a perforation line, and is not particularly limited as long as it can be easily broken or bent, such as a line having a groove carved into a thin wall. The shape, thickness, overhang width, number, arrangement, etc. of the grindstone central hole inner diameter adjusting piece 33 are not particularly limited as long as the grindstone can be mounted by aligning the grindstone with the shaft of the grinder. For example, like the label 300 shown in FIG. 6 , the adjustment piece 303 may be formed in a triangular shape. Figure 6
In the figure, 301 is a label body, and 302 is a line part.

Further, although the label 3 is integrated in the embodiment of FIG. 1, it may be divided into a plurality of pieces 30 as shown in FIG. 5 , for example. Although the embodiment is an offset rotary wheel, as described, the present invention is a flat rotary wheel,
It can be applied to various types of rotary wheels such as sandpaper type rotary wheels.

[0021]

As described above, according to the present invention, a grindstone is a rotary grindstone which is fitted and attached to a grindstone rotation driving shaft of a grinder at a grindstone central hole, and the grinder shaft or a pilot portion on the grinder shaft has different dimensions. It can be mounted on grinders without the need for costly components such as adapters, and for such different grinder sizes
Manufactured with a constant inner diameter of the center hole of the grindstone
And, mounting can, therefore, it requires fabrication mold of one type can correspondingly inexpensively provide further different graph as the
It is possible to keep the inner diameter of the grinding wheel center hole constant with respect to the inda dimension.
Thus, it is possible to provide a rotary grindstone that saves the time and effort required for stock journaling according to the user grinder size .

[Brief description of drawings]

FIG. 1 is a plan view of an embodiment of the present invention.

FIG. 2 is a sectional view taken along line XX of FIG.

FIG. 3 is an explanatory view of a usage state of the grindstone of FIG. 1.

FIG. 4 is another explanatory view of the usage state of the grindstone of FIG. 1.

FIG. 5 is a plan view of another embodiment of the present invention.

FIG. 6 is a plan view of a grindstone for showing still another example of the label.

FIG. 7 is an explanatory view of a conventional rotary grindstone in use.

FIG. 8 is a diagram illustrating another usage state of the conventional rotary grindstone.

[Explanation of symbols]

 1 Offset Type Rotating Whetstone 2 Grindstone Main Body 3 Label 31 Label Main Body 32 Line Part 33 Grindstone Central Hole Inner Diameter Adjustment Piece 300 Label 301 Label Main Body 302 Line Part 303 Adjusting Piece 4 Grinder 41 Shaft 41a Pilot Part 42 Tightening Nut 42a Pilot Part

Claims (1)

[Scope of utility model registration request] 1. A rotary grindstone fitted and attached to a grindstone rotation driving shaft of a grinder at a grindstone center hole, wherein a label is attached to at least one surface, and the label is a main body portion attached to the grindstone main body, said main body portion. And a line portion which is arranged along the circumference of the central hole and which can be broken or bent and a central hole inner diameter of a predetermined thickness which projects from the line portion toward the center of the central hole. A rotary grindstone having an adjusting piece.