JP2003191159A - Polishing tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable to polish a surface to be polished even if the surface to be polished exists at a place where a worker does not enter while retaining a polishing tool. <P>SOLUTION: In the polishing tool, a polishing member 3 is provided on a rotation shaft member 2 supported at a cantilever method and a polishing is carried out by rotating it while pressing the polishing member to an object surface to be polished. A plurality of rod-like polishing members are radially disposed to a rotation axis X of the rotation shaft member as a center and one end side of each of the polishing members is pivotably supported to the rotation shaft member along the rotation axis direction. An attitude switching mechanism 18 is provided, which can switch an attitude of the polishing member to a first attitude that a free end side is adjacent to the rotation axis side and a second attitude that the free end side is spaced from the rotation axis side as compared with the first attitude in the state that the free end side is directed to a base part side of the rotation shaft member. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polishing tool in which a polishing member is provided on a rotating shaft member which is supported in a cantilever manner, and the polishing member is rotated while being pressed against a surface to be polished to perform polishing.

[0002]

2. Description of the Related Art In a conventional polishing tool, the polishing member is fixed to a rotary shaft member so that the relative posture of the polishing member and the rotating member does not change, and an operator holds the polishing tool on the surface to be polished. Then, the polishing member can be rotated and pressed while being pressed against the surface to be polished.

[0003]

Therefore, even if there is a surface to be polished in a place where an operator cannot hold and enter the polishing tool, such as the inside of a container such as a thin pipe or a tank or a bottle. However, there is a drawback that the surface cannot be polished.

The present invention has been made in view of the above circumstances, and an object thereof is to enable polishing even if there is a surface to be polished in a place where an operator holds the polishing tool and cannot enter it. To do.

[0005]

According to a first aspect of the invention, a polishing member is provided on a cantilevered rotary shaft member, and the polishing member is rotated while being pressed against a surface to be polished. In the polishing tool, a plurality of rod-shaped polishing members are arranged radially around the rotation axis of the rotary shaft member, and one end side of each of the polishing members is arranged along the rotation axis direction. Swingably supported on the rotary shaft member,
With respect to the posture of the polishing member, a first posture in which the free end side is close to the rotary shaft core side and a state in which the free end side is directed to the rotary shaft member base side are the first posture. The point is that a posture switching mechanism that can switch to a second posture that is separated from the rotation axis side is provided.

[Operation] A plurality of rod-shaped polishing members are arranged radially around the rotary shaft core of the rotary shaft member, and one end side of each of the polishing members is swingable along the rotary shaft core direction. Further, since the polishing member is supported by the rotary shaft member, when the posture of the polishing member is switched to the first posture in which the free end side is close to the rotary shaft core side, the free end sides of the polishing members are rotated in the radial direction of rotation. When the interval is narrowed and the attitude of the polishing member is switched to the second attitude in which the free end side is directed toward the rotary shaft member base side and the free end side is farther from the rotary shaft core side than the first attitude, The distance between the free ends of the polishing members in the radial direction of rotation increases.

[Effect] When there is a surface to be polished in a place where an operator cannot hold and enter the polishing tool, if there is a through hole opening in the surface to be polished, the polishing member can be passed through the through hole. Switch to the first position so that it can be moved in front of the surface to be polished, and then to move in front of the surface to be polished through its through hole, then switch the polishing member to the second position and pull back the polishing member. You can polish while holding it on the surface surrounding the through hole, and after finishing polishing, by changing the posture of the polishing member in the opposite direction,
The polishing member can be pulled back through the through hole.

When the diameter of the through hole opening on the surface to be polished is small, the through hole is reopened so that the polishing member switched to the first position can pass through, and there is no through hole opening on the surface to be polished. In this case, the surface around the through hole can be polished by forming a through hole through which the polishing member switched to the first posture passes.

Therefore, even if there is a surface to be polished in a place where an operator cannot hold and enter the polishing tool, the polishing can be performed.

According to a second aspect of the present invention, a cylindrical body into which the polishing member is inserted from the base side thereof is movable relative to the polishing member along the rotation axis, and the cylindrical member is movable. The posture switching mechanism is constructed by providing a relative position to the polishing member so that the relative position can be fixedly operated.

[Operation] Since the polishing member is inserted into the cylindrical body from its base side, when the base side of the polishing member is deeply inserted into the cylindrical body, the free end side of the polishing member comes close to the rotary shaft core side and is shallowly inserted. The posture of the polishing member can be changed so that the free end side of the polishing member is separated from the rotary shaft core side.

Further, the attitude switching mechanism is constructed by providing the cylindrical body so that it can be moved relative to the polishing member along the axis of rotation and can be fixedly operated in a relative position with respect to the polishing member. By changing and fixing the relative position between the cylindrical body and the polishing member, the distance between the free ends of the polishing members in the radial direction of rotation when the posture is switched to the first posture or the second posture. Can be adjusted.

[Effect] The attitude of the abrasive material when switched to the first attitude can be adjusted according to the diameter of the through hole,
In addition, the posture of the abrasive when switching to the second posture can be adjusted according to the polishing range.

A third aspect of the invention is characterized in that the polishing member is elastically bent and deformable.

[Operation] When the surface to be polished has irregularities,
The polishing member can be polished while elastically bending and deforming along the irregularities.

[Effect] Even if the surface to be polished has irregularities, it can be surely polished.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows that a rotating shaft member 2 is supported in a cantilever manner on an electric power tool 1 that uses an electric drill driven by a built-in battery, and a plurality of rod-shaped polishing members 3 are provided on the rotating shaft member 2 and these polishing members are used. 3 shows a polishing tool A that rotates while polishing the tip end side of 3 while pressing it against the surface 4 to be polished.

The rotary shaft member 2 includes a base portion 6 fixed to the chuck 5 of the electric power tool 1 and a square shaft portion 7 having a square cross section. The square shaft portion 7 extends along the rotary shaft core X direction. The outer shaft portion 8 is fitted onto the outer periphery of the plurality of polishing members 3 so as to be slidably movable.
Are arranged radially around the rotation axis X of the rotation shaft member 2, and one end side of each of the polishing members 3 is
It is attached to one end side of the outer shaft portion 8 so as to be swingable along the direction of the rotary shaft core X and supported by the rotary shaft member 2.

As shown in FIG. 2, the polishing member 3 is constituted by fixing an abrasive grain 10 to a steel wire 9 which is elastically bendable and deformable.
The polishing material unit 12 is integrally fixed with a ring shaft 13, and a plurality of the polishing material units 12 are swingably supported by the ring shaft 13. The pressing member 14 of the ring shaft 13 is attached to one end of the outer shaft portion 8. The ring shaft 1 is provided radially at intervals and forms the male screw portion 15 and is fitted into the male screw portion 15.
3 is attached by a holding nut 16 screwed into the male screw portion 15 so as not to come off, and is swingably attached along the direction of the rotation axis X.

Then, the bottomed cylindrical body 17 into which each polishing member 3 is inserted from its swinging base side is movable relative to the polishing member 3 along the rotation axis X, and each polishing member 3 is movable. As shown in FIG. 3 (a), the relative positions of the polishing members 3 are fixed so that the free end side of the polishing member 3 is close to the rotation axis X side. (B)
As shown in FIG. 7, with the free end side facing the base portion 6 side of the rotary shaft member 2, the free end side is integrated with the second posture in which the free end side is farther from the rotary shaft core X side than the first posture. In the work of providing the posture switching mechanism 18 that can be easily switched, the polishing member 3 is switched to the first posture and passed through the through hole 23 formed in the pipe wall of the steel pipe B as will be described later. The work of switching to the posture and polishing is also performed efficiently.

That is, the bottom plate portion 19 of the cylindrical body 17 is fixed to the square shaft portion 7 so that the cylindrical body 17 having the base side of the polishing member 3 inserted therein does not come out from the free end side of the polishing member 3.
Is fixed to the tip of the angular shaft portion 7 in a posture of entering the inside of the cylindrical body 17, and the bottom plate portion 19 is configured as a regulating member that regulates the amount of each polishing member 7 entering the cylindrical body 17 on the base side. The relative movement range of the cylindrical body 17 and the polishing member 3 is regulated so that the polishing member 3 can be smoothly switched from the first posture to the second posture, and the angular shaft portion 7 and the outer shaft portion 8 are screwed. Two
A plurality of female screw holes 21 to be fixed at 0 are formed in the square shaft portion 7 to provide a posture switching mechanism 18.

Then, as shown in FIG. 3A, by inserting the outer shaft portion 8 into the inside of the cylindrical body 17 at the base side of each polishing member 3 until its lower end hits the bottom plate portion 19, The posture of the polishing member 3 is switched to the first posture in which the free end side of the polishing member 3 is close to the rotation axis X side and the interval between the free end sides of the polishing member 3 in the radial direction of rotation is narrow, and the position shown in FIG. )
As shown in FIG. 5, the outer shaft portion 8 is moved along the rotary shaft core X such that the lower end thereof is separated from the bottom plate portion 19, and the angular shaft portion 7 is screwed into one of the female screw holes 21. And the outer shaft portion 8 are fixed to each other, with the free end side facing the base portion 6 side of the rotary shaft member 2, the free end side is separated from the rotary shaft core X side from the first posture, Depending on the selected position of the female screw hole 21, the polishing member 3 is switched to the second posture in which the distance between the free ends of the polishing member 3 in the radial direction of rotation increases.

The posture of the polishing member 3 is changed from the second posture to the first posture.
When switching to the posture, the polishing member 3 moves the upper edge 2 of the cylindrical body 17.
The upper edge 22 is covered over the entire circumference so as not to get caught in 2.
Is curved downwards to the outside.

As shown in FIGS. 4 to 7, the method of using the polishing tool A is as follows. The resin layer C of the epoxy resin provided on the inner surface (one example of the surface to be polished) 4 of the steel pipe B for supplying city gas is provided. The case of using for polishing removal will be described as an example.

In the polishing removal of the resin layer C, since the through hole 23 formed in the pipe wall of the steel pipe B is closed, the resin layer C is fitted into the through hole 23 in a continuous gas state in which the flow of the supply gas is not stopped. When welding the embedded steel plug (not shown) to the wall of the pipe around the through hole 23, the resin layer C is heated during welding of the plug so that it does not become mist-like particles and scatter into the pipe. The predetermined area of the resin layer C around the through hole 23 is removed by polishing in advance.

The through hole 23 is formed for mounting a gas bag in the pipe, and is formed in a circular shape in a plan view on the upper pipe wall of the steel pipe B arranged laterally.
As shown in FIG. 3, a transparent resin-less blow bag 24 for preventing the supply gas flowing out from the through hole 23 from leaking to the outside.
Is airtightly covered around the through hole 23, and the electric tool 1 is grasped by the hand 25 inserted into the no-blowing bag 24, and the posture of each polishing member 3 is switched to the first posture that can pass through the through hole 23. It is made to enter the pipe through the through hole 23.

Next, as shown in FIG. 5, the posture of each polishing member 3 is arranged so that a predetermined range 26 of about 30 mm from the edge of the through hole 23 in the resin layer C around the through hole 23 can be removed by polishing. To the second position, and the rotary shaft member 2 is connected to the steel pipe B.
6, the electric tool 1 is grasped so as to be pulled upward, and as shown in FIG. 6, the resin layer C in the predetermined range 26 is polished and removed while the polishing members 3 are pressed against the inner surface of the pipe.

After the resin layer C in the predetermined range 26 is removed by polishing, as shown in FIG.
With respect to the cylindrical body 17, the polishing member 3 is moved to the first posture in which the polishing member 3 can pass through the through hole 23, and is pulled out of the tube through the through hole 23. At this time, even if the polishing chips attached to each polishing member 3 fall, the polishing chips can be received inside the cylindrical body 17 and prevented from scattering into the pipe.

[Other Embodiments] 1. The polishing tool according to the present invention is such that, at a branch portion such as a water supply pipe or a sewer pipe, a polishing member is caused to enter the pipe through a branch through hole to polish deposits and the like accumulated on the inner surface of the pipe around the branch through hole. It may be used for removal. 2. The polishing tool according to the present invention may be used by polishing the inside of a container such as a bottle or a tank by inserting the polishing member into the inside of the container or the tank through a through hole opened in the surface to be polished. .

[Brief description of drawings]

FIG. 1 is a perspective view of a polishing tool.

FIG. 2 is an exploded perspective view of a main part

FIG. 3 is an explanatory diagram of a posture switching mechanism.

FIG. 4 is an explanatory diagram of how to use

FIG. 5 is an explanatory diagram of how to use

FIG. 6 is an explanatory diagram of how to use

FIG. 7 is an explanatory diagram of how to use

[Explanation of symbols]

2 Rotating shaft member 3 Polishing member 4 Surface to be polished 17 cylinder 18 Attitude switching mechanism 19 Restricted member X rotation axis core

   ─────────────────────────────────────────────────── ─── Continued front page    F term (reference) 3C058 AA06 AA13 AA14 AA16 CB04                 3C063 AA07 AB09 BA17 BG03 BH03                       BH30 EE28 FF30

Claims (3)

[Claims] 1. A polishing tool in which a polishing member is provided on a cantilever-supported rotary shaft member, and the polishing member is rotated while pressing the polishing member against a surface to be polished, wherein a plurality of rod-shaped polishing members are provided. The polishing members are arranged radially around a rotation shaft core of the rotation shaft member, one end side of each of the polishing members is swingably supported along the rotation shaft core direction, and is supported by the rotation shaft member. With respect to the posture of the member, the free end side is closer to the rotary shaft core side, and the free end side is closer to the rotary shaft member base side, and the free end side is more than the first posture. A polishing tool provided with a posture switching mechanism capable of switching to a second posture separated from the rotation axis side. 2. A cylindrical body into which the polishing member is inserted from the base side thereof is movable relative to the polishing member along the axis of rotation, and a relative position to the polishing member is fixed. The polishing tool according to claim 1, wherein the polishing tool is provided at a position to form the posture switching mechanism. 3. The polishing tool according to claim 1, wherein the polishing member is elastically bent and deformable.