JP2001225274A - Rotary polishing tool usable in any direction - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily replace a polishing member of a rotary polishing tool with a new one by reducing members to be discarded when the polishing member is worn, and to fit the polishing member to rotary shafts in various forms. SOLUTION: This rotary polishing tool 50 comprises a center member 5 and a polishing member 6 formed independently of each other. Both members 5, 6 are detachably rotatory-engaged through groove parts 5f of the center member 5 and projecting parts 6d of the polishing member 6. The projecting parts 6d are formed at both faces of the polishing member 6, so that both the surface and back face are detachably usable. Since the use of both faces of the polishing member 56 permits polishing as far as the projecting parts 6d, only the projecting parts 6d are discarded to easily replace the polishing member 6 with the new one, and the center member 5 can be reused as it is.

Description

DETAILED DESCRIPTION OF THE INVENTION

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary polishing tool which is mounted on and fixed to a rotary shaft of a rotary drive such as a grinder having various drive mechanisms.

2. Description of the Related Art FIGS. 7A and 7B are central cross-sectional explanatory views of a conventional rotary polishing tool, in which FIG. 7A shows a rotary polishing tool before use, and FIG. The state after use is illustrated. This conventional rotary polishing tool has a disk-shaped base (10) made of synthetic resin or metal.
The polishing member (200) is adhered to only one surface of (0) by an adhesive. This rotary polishing tool has a rotary shaft mounting hole (102) formed in the center of the base.
For example, a rotary shaft (72) of a grinder having a male screw portion formed at the tip is inserted upward from below in the figure, and a nut or the like is tightened to the male screw portion of the rotary shaft using a tightening tool. And can be fixed to the rotating shaft of the grinder. Then, as shown in FIG. 7B, when the polishing member (200) was worn, the entire rotary polishing tool was discarded together with the base (100).

[Problems to be Solved by the Invention] As described above, when a polishing member (200) is bonded to a base (100) made of a synthetic resin or metal, as described above, When (200) becomes worn and becomes unusable, the entire polishing tool is discarded as it is. However, discarding the entire polishing tool together with the base in this way may have a significant adverse effect on the environment. It is also not preferable from the viewpoint of resource saving. Furthermore, material costs are not negligible to those skilled in the art.

[0004] When replacing the rotary polishing tool, the used polishing tool is removed from the rotary shaft of the grinder by loosening and removing the nut using a special tool.
After that, a new polishing tool had to be attached to the rotating shaft of the grinder, and the nut had to be tightened and fixed again using the tool, which was extremely laborious, and the workability and work efficiency were very poor. Then, in this invention, it aims at solving the said problem etc., and makes the following matters a subject.

First, when a polishing member becomes worn and becomes unusable, the amount of discarded portions of the rotary polishing tool must be extremely small. Most of the base 100 is made to be the polishing member 200, so that the discarded portion of the rotary polishing tool is further reduced.
As a result, industrial waste can be reduced, adverse effects on the environment can be eliminated, energy can be saved, and manufacturing costs can be reduced. When a rotating abrasive tool is worn out and needs to be replaced with a new one, it can be changed very easily without using special tools. Thus, the replacement of the polishing tool can be performed easily and in a short time, and the workability or work efficiency is improved.
In addition, it must be mounted on the rotating shaft of any type of rotary drive, such as electric or pneumatic. Also, all kinds of polishing members, such as sandpaper, feather cloth,
It is also an object of the present invention that a rotary polishing tool can be manufactured using a polishing member such as rubber.

[Means for Solving the Problems] In order to solve the above problems, a first aspect of the present invention is that a disk-shaped polishing member (6) is a polishing member (2b) made of a grindstone,
The back surface is formed from a polishing member (2a) such as sandpaper. A rotary polishing tool having a connecting portion (12e) connected to a rotating shaft of a rotary driving device such as an electric or air drive at the center of the polishing member (6), comprising a polishing member (2a) and a polishing member (2b). 6) The central member (12) having the connecting portion (12e) is formed separately from the central member (12), and the polishing member (2b) and the central member (12) are separated by engaging means. It has been fixed as possible.

Since the base is composed of the polishing member holding portion (11) and the center member (12) formed separately, the polishing members (2a) and (2b) are worn out and become unusable. In this case, only the ridge (6d) may be discarded, and the center member (12) can be reused as it is, which contributes to environmental protection, energy saving and reduction of manufacturing cost.

In a second aspect of the present invention, in the first aspect, the polishing member holding member (11) has a hollow portion (11a) having a through hole at the center thereof, and the hollow portion (11a) has a hollow portion (11a). The rotation engagement part (11
d) is formed, and a rotation engaging portion (12d) that engages with the rotation engaging portion (11d) is provided on the central member (12), and the rotation of the polishing member holding member (11) is performed by these engaging means. The engagement portion (11d) rotates in a direction opposite to the rotation direction of the rotation shaft of the rotary drive, and rotates the engagement portion (1) of the central member (12).
2d), and by rotating them in reverse, the two are released from each other. As a result, the rotation shaft of the rotary drive rotates, and the two rotation engagement portions (11
d) The engagement of (12d) is tightened to each other, the connecting portion (12e) of the central member (12) is formed of a rotating shaft mounting hole, and the rotating shaft of the rotary drive is inserted into this connecting portion (12e). Then, the central member (12) can be fixed to the rotating shaft of the rotary driving machine by fixing means such as nuts or bolts, and the outer diameter of the fixing means is equal to the hollow portion of the polishing member holding member (11). The polishing member holding member (11) is formed smaller than the inner diameter of the polishing member holding member (11) while the center member (12) is fixed to the rotating shaft.

As described above, since the connecting portion of the central member to the rotary shaft is simply formed by the rotary shaft mounting hole, it can be mounted on various types of rotary shafts. In the engagement means between the polishing member holding member and the central member, the rotation of the rotation shaft of the rotary drive causes a load to be applied in a direction in which the engagement between the two rotational engagement portions is tightened. Will not leave. Since the outer diameter of the fixing means for fixing the central member to the rotating shaft is smaller than the inner diameter of the hollow portion of the polishing member holding member, only the polishing member holding member and the polishing member are kept in a state where the central member is fixed to the rotating shaft. Can be removed.

In a third aspect of the present invention, in the first aspect, the polishing member (2a) is formed of an appropriate number of sandpaper pieces (21), and the polishing member holding member ( 11) is a disk provided with a hollow portion (11a) formed of a through hole at the center thereof,
The above-mentioned sandpaper piece (21) is fixed to b), and a rotation engagement part (11d) is formed on the inner peripheral surface of the hollow part (11a). The central member (12) is composed of a disc body (12a) and
A short engaging cylinder portion (12) provided on the surface of the disk body (12a) and having a rotational engagement portion (12d) formed on the outer peripheral surface.
b) and (12c) extending laterally from a side edge of the disk main body (12a), and the disk main body (12a) has a connection portion (12e) of a rotary shaft of a rotary driving machine at the center thereof. Is formed, and a polishing member holding member (1) is formed.
The rotation engagement portion (11d) of the center member (12) is rotated by rotating the rotation engagement portion (11d) in the opposite direction to the rotation direction of the rotation shaft.
d) can be engaged, and by reversely rotating it, the engagement is released and the connection (12) of the central member (12)
The center member (12) can be fixed to the rotary shaft of the rotary drive by fixing the rotary shaft of the rotary drive to the rotary shaft of the rotary drive through e) and fixing means such as nuts or bolts. The hollow portion (11) of the polishing member holding member (11)
The polishing member holding member (1) is formed smaller than the inner diameter of the polishing member holding member (1), and the polishing member holding member (11) can be separated while the center member (12) is fixed to the rotating shaft.
1) When the central member (12) is engaged with the central member (12),
The surface (12f) of (12c) comes into contact with the back surface (11c) of the polishing member holding member (11).

A fourth aspect of the present invention is the polishing member holding member (11) according to the first, second, or third aspect.
Is formed of a grindstone, and the polishing member holding member (11) and the polishing member (2b) are hard members integrally formed from the same material. Since the polishing member (2b) and the polishing member holding member (11) are formed as a hard integral member made of the same material, the polishing member holding member (11) can be made unnecessary.

That is, in a rotary polishing tool having a connection portion connected to a rotation shaft of a rotary driving machine at the center of a disk provided with a polishing member (4) such as sandpaper or a grindstone on the surface, a connection portion (3e ) Is fixed to the polishing member (4) in a separable manner by engaging means. The rotary polishing tool according to the present invention does not use the polishing member holding member at all, so to speak, the central member also functions as the polishing member holding member, and basically has two members, the central member and the polishing member. , And various types of hard or flexible polishing members can be used as the polishing member.

[Embodiment of the Invention] An embodiment of the present invention will be described below with reference to the accompanying drawings. 1 to 7 illustrate various embodiments of the present invention. 1 to 3 show a portion of a rotary shaft of a grinder which is a rotary driving machine and a first embodiment of a rotary polishing tool according to the present invention. FIG. 1 is an exploded perspective view thereof, and FIG. FIG. 3 is an exploded central longitudinal sectional view, and FIG. 3 is a central longitudinal sectional view in a state in which a rotary polishing tool is fixed to a rotating shaft of a grinder.

The grinder (70) illustrated here
Is of an electric type, in which a male screw portion (72) is formed at the tip of the rotating shaft (71).
On the other hand, the rotary polishing tool (50) is composed of two members, a central member (5) and a polishing member (6) formed separately.
The center member (5) is made of a hard synthetic resin, and the polishing member (6) is a grinding wheel.

The central member (5) constituting the rotary polishing tool (50) has a rotary shaft mounting hole (5) as a connection portion to the rotary shaft.
e) has a short cylinder portion (5b) for engagement formed above in the figure of a disk main body (5a) having a center portion e), and the outer peripheral portion of the upper end of the short cylinder portion for engagement (5b) has 1 / Four extended portions (5d) as rotation engaging portions are formed at two point-symmetric positions, and a long groove portion (5f) is formed below the extended portion (5d). Will be. The polishing member (6) that equips the other rotary polishing tool (50) has a disk shape with a hollow portion (6a) formed of a circular through hole formed at the center, and the hollow portion (6a). On the inner peripheral surface at the lower end of the, two ridges (6d) as a rotation engagement portion having a 周 circumferential length are formed at two point-symmetric positions. As a result, the center member (5) and the polishing member (6) are separated from the groove (5).
f) and the ridge (6d) can be combined by rotationally engaging each other.

More specifically, at one end of the groove (5f) formed in the center member (5), a partition (5g) which is the terminal of the groove (5f) is formed, and the groove (5f) is formed.
The other end is an open introduction part (5h). The hollow portion (6a) of the polishing member (6) is engaged with the engaging short cylindrical portion (5b) provided with the groove (5f), and one end of each protruding ridge (6d) is connected to the central member (5). ) Of the groove portion (5f) is gradually rotated from the introduction portion (5h) to engage with the groove portion (5f), and the partition portion (5) at the end of the groove portion (5f) is engaged.
g) until it abuts.

The rotational engagement direction R of this fitting is opposite to the rotational direction S of the rotating shaft (71) of the grinder (70). Thus, when the rotating shaft (71) rotates in the direction of the rotation direction S to perform the polishing operation, a load is applied to the polishing member (6) in a direction in which the polishing member (6) is fastened to the central member (5). There is no risk that the polishing member (6) will come off during the polishing operation.

Polishing is performed using the rotary polishing tool (50), and when the polishing member (2a) becomes worn and becomes unusable, the polishing operation is performed using the polishing member (2b) on the back side. I can do it. There is no need to loosen the fixing screw (73) and remove it at all. The polishing member (6) is easily removed from the center member (5), and the surface of the polishing member (2b) is turned upside down. They can be combined by rotating engagement. Therefore, once this center member (5) is once attached to the rotating shaft (71), there is no need to remove and fix the fixing screw afterwards, and it is easy to replace the new polishing member (6) with one touch. It is possible to do.

FIG. 4 shows the central member (5) used in the above embodiment. The center member (5) includes a disk main body (5a) and an engaging ridge (5d) provided on a surface of the disk main body (5a). Disk body (5
a) is a disk having an outer diameter smaller than the outer diameter of the polishing member holding member (11) and larger than the inner diameter of the hollow portion (11a) of the polishing member holding member (11). At the center of the disk main body (5a), a rotary shaft mounting hole (5e) is formed as a connecting portion for connecting to the rotary shaft of the rotary drive. The rotary shaft mounting hole (5e) is a circular hole penetrating through the front and back of the disk main body (5a), and has an inner diameter substantially equal to the outer diameter of the rotary shaft (not shown) of the rotary driving machine. is there. Then, the disc main body (5a) is attached to the rotating shaft by the fixing means as shown in the first and second embodiments, with the rotating shaft mounting hole (5e) being engaged with the rotating shaft. And fixed to the rotating shaft.

Hereinafter, another embodiment of the rotary polishing tool according to the present invention will be described. 5 and 6
Shows a third embodiment of the rotary polishing tool according to the present invention, and FIG. 5 shows a polishing member holding member (11) before engagement.
And a substantially central longitudinal sectional view of the central member (12).
It has already been described that the polishing holding member (11) is made of the polishing member (2b).

The polishing member holding member (11) has a disk shape with a hollow portion (11a) formed of a circular through hole. A polishing member (2a) is adhered to a surface (11b) of the polishing member holding member (11) by an adhesive (22). Further, on the inner peripheral surface of the hollow portion (11a) of the polishing member holding member (11), a ridge portion (6d) as a rotation engagement portion is formed.

The polishing member (2a) is formed of a number of sandpaper pieces (21... 21). Each of the sandpaper pieces (21... 21) is a rectangular small piece.
Here, the sandpaper includes one in which abrasive powder is attached to the surface of paper. Individual sandpaper pieces (21)
Are arranged in a state of leaning against one of the adjacent sandpaper pieces (21), that is, in a state inclined with respect to the surface of the polishing member holding member (11).
Adhered to 1). More specifically, the adhesive (22)
The surface (11) of the polishing member holding member (11) coated with
In (b), the sandpaper pieces (21) are arranged in a ring shape while partially overlapping each other and adhered. Then, the sandpaper piece (21) is pressed to dry the adhesive (22).

While various embodiments of the present invention have been described above, the present invention is a rotary polishing tool comprising two components, a central member and a polishing member. That is, only the polishing member can be separated and detachably fixed, and the polishing member can be used on both sides.

Here, the maximum outer diameter of a fixing means such as a fixing screw for fixing the central member to the rotating shaft of the rotary driving machine is formed smaller than the inner diameter of the central through hole (hollow portion) of the removable polishing member. It is important that the polishing member be removed from the central member while the central member is fixed to the rotating shaft.

[Effect of the Invention] In the first embodiment of the present invention, since the polishing member is formed separately from the central member, if the polishing member becomes worn and becomes unusable, Only the abrasive member needs to be removed and discarded, and replaced with a new one. The central member can be reused as it is, contributing to environmental protection, resource saving, and reduction in manufacturing costs. Since the polishing member and the central member can be separably fixed by the engagement means, the engagement and disengagement of both can be easily performed.

According to the second aspect of the present invention, in addition to the effect of the first aspect, since the connecting portion of the central member to the rotary shaft is simply formed by the rotary shaft mounting hole, various types of rotary shafts are provided. It can be attached to a shaft. In the engagement means between the polishing member and the center member, a load is applied in a direction in which the engagement between the rotational engagement portions is tightened by the rotation of the rotation shaft of the rotary drive, so that the engagement between the two is disengaged during polishing. There is no fear of doing it. Since the outer diameter of the fixing means for fixing the central member to the rotating shaft is formed smaller than the inner diameter of the hollow portion of the polishing member, it is possible to remove the polishing member while the central member remains fixed to the rotating shaft. it can.

In the third embodiment of the present invention, since the polishing member and the polishing member holding portion are formed as a rigid and integral member, the polishing member holding portion can be made unnecessary.

In the fourth embodiment of the present invention, the polishing member holding member is not used at all. In other words, the polishing member and the central member also serve as the polishing member holding member. When discarding, ridges (6d)
It is only necessary to discard only the waste, and the amount of waste can be reduced, which can further contribute to environmental conservation, resource saving, and reduction of manufacturing costs.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a first embodiment of a rotary polishing tool according to the present invention.

FIG. 2 is an exploded central longitudinal sectional view of the first embodiment shown in FIG.

FIG. 3 is a central longitudinal sectional view showing a state in which the rotary polishing tool according to the first embodiment shown in FIG. 1 is fixed to a rotary shaft of a rotary driving machine.

FIG. 4 shows a central member constituting a rotary polishing tool according to the present invention.

FIG. 5 is an exploded center longitudinal sectional view showing a third embodiment of the rotary polishing tool according to the present invention.

FIG. 6 is an exploded perspective view of the third embodiment shown in FIG.

FIG. 7 is a central longitudinal sectional view of a conventional rotary polishing tool, in which (A) shows a state before use and (B) shows a state in which a polishing member after use is worn.

[Explanation of symbols]

 2a, 2b, 4, 6, 200 ... Polishing member 11 ... Polishing member holding member 6a, 11a ... Hollow portion 3, 5, 12 ... Central member 5a, 12a ... Disk body 5b, 12b ... For engagement Short cylinder part 5d, 12c ... Extension part 3e, 12e, 102 ... Rotation shaft mounting hole 5f ... Groove part 5g ... Partition part 5h ... Introducing part 6d ... Protrusion part 11b ... 11c… Back surface (of polishing member holding member) 11d, 12d… Rotary engagement part 12f… Front surface (of central member) 21… Sandpaper piece 22… Adhesive 50, 70… Grinder 71… Rotating shaft 72 Male screw part 73 Fixing screw 100 Base

Claims (5)

[Claims] 1. A polishing member (2b) made of a grindstone is constituted by a disk-shaped polishing member (6), and a polishing member (2a) such as sandpaper is provided on the back side of the polishing member (6). ing. On both sides of the polishing member (6), ridges (6d)
And a connecting member (12e) connected to the rotation shaft of a rotary drive such as an electric or air drive at the center of the polishing member (6), wherein the polishing members (2a) and (2b) And a central member (12) having the connecting portion (12e) are formed separately from each other. The polishing member (6) and the central member (12) are A rotary polishing tool fixed so as to be separable by engagement means. 2. A polishing member holding member (11) has a hollow portion (11a) formed of a through hole at the center thereof, and a rotation engaging portion (11d) is formed at an inner edge of the hollow portion (11a). A rotation engaging portion (12d) that engages with the rotation engaging portion (11d) is provided on the central member (12), and the rotation engaging portion (11d) of the polishing member holding member (11) is provided by these engaging means. ) Is rotated in the direction opposite to the direction of rotation of the rotation shaft of the rotary drive, and the rotation engagement portion (12d) of the central member (12) is rotated.
, And by rotating them in reverse, the engagement between them is released, so that the rotation shaft of the rotary driving machine is rotated, so that the two rotation engagement portions (11d) (1
The engagement of 2d) is mutually tightened, the connecting portion (12e) of the central member (12) is formed of a rotating shaft mounting hole, and the rotating shaft of the rotary drive is inserted through this connecting portion (12e), The central member (12) can be fixed to the rotating shaft of the rotary drive by fixing means such as nuts or bolts, and the outer diameter of the fixing means is equal to the polishing member holding member (1).
The polishing member holding member (11) can be separated while the center member (12) is fixed to the rotating shaft by being formed smaller than the inner diameter of the hollow portion (11a) of (1). Item 4. A rotary polishing tool according to Item 1. 3. The rotary polishing tool according to claim 1, wherein the polishing members (2a) and (2b) are formed on both sides, and the front and back sides can be used on both sides by the attachment and detachment according to claim 2. 4. The polishing member (2a) is formed of sandpaper or the like, the polishing member holding member (11) is formed of a grindstone, and the polishing member holding member (11) and the polishing member (2b) are integrated and the same. The rotary polishing tool according to claim 1, wherein the rotary polishing tool is a hard material formed from a material. 5. A rotary polishing tool having a connecting portion connected to a rotating shaft of a rotary drive at the center of a disk provided with a polishing member (4) such as a whetstone and sandpaper on at least both surfaces. The central member (3) having (3e) is formed separately from the polishing member (4), and the central member (3) and the polishing member (4) are fixed so as to be separable by engaging means. 3. The method according to claim 1, wherein
A rotary polishing tool according to 1.