Polishing tool and polishing device

Abstract

To provide a polishing tool which enables polishing in a narrow work space, and to provide a polishing device.SOLUTION: A polishing device includes: a plurality of rod-like bodies; a holding part H which holds one end side of each of the rod-like bodies in a swingable manner; an extension rod 3 connected to the holding part H; and a rotary drive part 4 which rotates the extension rod 3. The holding part H includes: a foundation plate including attachment holes into which the rod-like bodies may be inserted; and a holding plate which sandwiches head parts serving as removal prevention parts of the rod-like bodies inserted into the attachment holes with the foundation plate.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a polishing tool and a polishing device. [Background technology]

[0002] Conventionally, the foundations of communication buildings and the like have been constructed by assembling hollow metal pipes. The hollow pipes of these building foundations tend to rust due to moisture such as condensation, rainwater, and frost. When the rust is severe, it is necessary to reinforce the hollow pipes or replace the building.

[0003] Furthermore, conventional polishing tools for removing rust include cleaners in which an abrasive sander is attached to the tip of a rotating wire, and the rotating wire is rotated by a motor to perform polishing with the abrasive sander (Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Publication No. 52-000969 DISCLOSURE OF THEINVENTION [Problem to be solved by the invention]

[0005] However, the cleaning device of Patent Document 1 has a problem in that it is difficult to operate the abrasive sander in a narrow space such as the inner surface of a hollow pipe, and is therefore unsuitable for polishing narrow spaces.

[0006] The present invention has been made in view of the above circumstances, and has an object to provide a polishing tool and a polishing apparatus capable of polishing in a narrow working space such as the inside of a hollow tubular material. [Means for solving the problem]

[0007] The grinding tool of the present invention is characterized by comprising a plurality of rod-shaped bodies and a holder for holding one end side of the plurality of rod-shaped bodies so as to be freely swingable. Effect of the Invention

[0008] According to the present invention, it is possible to provide an abrasive tool capable of efficiently removing rust from a narrow working space. [Brief description of the drawings]

[0009] [Figure 1] 1 is a perspective view of a polishing apparatus showing a first embodiment of the present invention. [Diagram 2] (A) is an enlarged view of the vicinity of the scraped area, and (B) is an even further enlarged view of the vicinity of the scraped area. [Diagram 3] FIG. 11 is an enlarged cross-sectional view showing the vicinity of the scraping portion during rotation inside the hollow tubular material. [Figure 4] FIG. 2 is an explanatory diagram showing the scraping unit disassembled into its individual parts (A) to (C). [Diagram 5] FIG. 13A is a perspective view showing a magnet, and FIG. 13B is a perspective view showing the magnet attached to an extension rod. [Figure 6] FIG. 13 is an oblique view of the bottom side of the base of the station building. [Figure 7] This is an oblique view showing the state in which a penetration hole has been opened on the side of the base of the station building. [Figure 8] FIG. 13 is a perspective view showing the state in which the polishing device is about to be inserted into the penetration hole in the side of the base of the station building. [Figure 9] FIG. 13 is a perspective view showing the state in which the scraper of the polishing device is inserted through a through-hole in the side surface of the base of the station building. BEST MODE FOR CARRYING OUT THEINVENTION

[0010] Preferred embodiments of the present invention will be described with reference to the accompanying drawings. Note that the embodiments described below do not limit the contents of the present invention described in the claims. Also, not all of the configurations described below are necessarily essential requirements of the present invention. Example 1

[0011] 1 to 9 show one embodiment of the polishing device of the present invention. As shown in FIG. 1, the polishing device 1 comprises a scraping part 2 as a polishing tool, an extension rod 3, and a rotary drive part 4 such as an electric drill.

[0012] As shown in FIGS. 2 to 4, the scraping unit 2 includes a needle 5, a male screw member 6 such as a cap screw (a hexagon socket head bolt), a base plate 7, a pressing plate 8, and a lock plate 9. As shown in FIG.

[0013] The needle 5 is made of a rod-shaped body 5A made of a metal such as iron, and the tip of a head 10 serving as a retaining portion that is expanded in diameter at one end side of the rod-shaped body 5A is provided with an arc-shaped curved surface portion 11. The side shape of the head 10 is formed into a substantially conical tapered surface that expands in diameter from the rod-shaped body 5A side to the curved surface portion 11 side. The needle 5 is preferably a rod-shaped body with excellent rigidity without bending, and is preferably a magnetic material that is attracted to a magnet.

[0014] The base plate 7 is made of a disk made of metal such as stainless steel, and has a central through-hole 12 in the center through which the male screw member 6 can be inserted, and a plurality of mounting holes 13 through which the shaft portion 5A of the needle 5 can be inserted formed around the central through-hole 12. The diameter of the mounting hole 13 is set to be equal to or larger than the diameter of the rod-shaped body 5A and smaller than the diameter of the head 10.

[0015] The retaining plate 8 is made of a disk made of metal such as stainless steel, and is provided in the center with a female screw portion 14 into which the male screw member 6 can be inserted and screwed.

[0016] The lock plate 9 is made of a disk made of metal such as stainless steel, and is provided at its center with a female screw portion 15 into which the male screw member 6 can be inserted and screwed.

[0017] The female screw portion 14 of the pressure plate 8 and the female screw portion 15 of the lock plate 9 are screwed into the male screw member 6 so that the thread grooves face in different directions, forming a double nut relationship between the pressure plate 8 and the lock plate 9. Therefore, the screwing position of the pressure plate 8 in the male screw member 6 is fixed by the lock plate 9 so that it does not loosen.

[0018] The diameters D1, D2, and D3 of the base plate 7, the pressure plate 8, and the lock plate 9 are approximately equal. The male screw member 6, the base plate 7, the pressure plate 8, and the lock plate 9 form a holding portion H (see Figures 4(B) and (C)) that holds the needle 5 so that it can swing freely.

[0019] 3, the position of the pressure plate 8 is fixed by a lock plate 9 so that the distance L between the base plate 7 and the pressure plate 8 is kept constant. Here, the distance L between the base plate 7 and the pressure plate 8 is a distance that allows the curved surface portion 11 to slide on the pressure plate 8 when the needle 5 swings. In other words, the distance L is set so that the head 10 of the needle 5 is not clamped and fixed by the base plate 7 and the pressure plate 8, and the swinging movement of the needle 5 is not restricted.

[0020] The extension rod 3 is made of a rod-shaped body made of a metal such as stainless steel. A plurality of extension rods 3 are provided with different overall lengths set to suit the work location. As shown in Fig. 3, the tip of the extension rod 3 is provided with a female screw portion 3A into which a male screw member 6 can be screwed. To improve the operability of the extension rod 3, the tip and base ends may be solid and the middle portion may be hollow to reduce weight.

[0021] As shown in Fig. 5, the extension rod 3 is provided with a magnet 16 that can be screwed into the female screw portion 3A of the extension rod 3. The magnet 16 has a male screw portion 16A at its base end that can be screwed into the female screw portion 3A of the extension rod 3. The magnet 16 is for adhering and recovering the broken needle 5.

[0022] The rotary drive unit 4 uses a conventional electric drill, and the base end of the extension rod 3 is connected to a chuck portion 4A of the electric drill.

[0023] A method of using the polishing device 1 configured as above will be described with reference to Figures 6 to 9. As shown in Figure 7, a through-hole 104 capable of communicating in the longitudinal direction of a hollow tubular material 103 having a rectangular cross section is drilled into a side wall 102 of a base 101 of a communication building 100. The through-hole 104 is formed with a diameter that allows the base plate 7, pressing plate 8, and lock plate 9 of the scraping unit 2 to pass through.

[0024] As shown in FIG. 8, without rotating the extension rod 3, the worker bundles the needles 5 by hand so that the bundle of rod-shaped bodies 5A of the needles 5 can be inserted through the through-hole 104, and the bundle of needles 5 is bundled in a state narrower than the diameters D1, D2, and D3 of the base plate 7, the holding plate 8, and the lock plate 9 (the state of the needles 5 shown by the dashed dotted lines in FIG. 3), and then the scraping part 2 is inserted into the through-hole 104. After that, the scraping part 2 is inserted into the inside of the hollow tubular material 103 as shown in FIG. 9, and the rotation drive part 4 is operated to rotate the extension rod 3. When the tip of the rod-shaped body 5A of each needle 5 is expanded by centrifugal force along a direction substantially perpendicular to the direction of the rotation axis X of the extension rod 3 (see FIG. 3), the tip of the rod-shaped body 5A of each needle 5 is made to conform to the shape of the cleaning surface 103A, and the tip of the rod-shaped body 5A of each needle 5 is struck against the cleaning surface 103A of the hollow tube material 103, and the impact force due to the mass of the metal such as iron of the rod-shaped body 5A and its rigidity that does not bend effectively strikes, peels off, and removes adhesions such as rust from every corner of the cleaning surface 103A. Therefore, there is no need for auxiliary equipment or a recovery device for the blasting material as in sandblasting or shot blasting, and the operation is easier than with grinding tools such as abrasive sanders, and adhesions can be efficiently removed even on the cleaning surface facing a narrow working space such as the inside of the hollow tube material 103 where it is difficult to work by hand, and the structure is simple and the product can be manufactured at low cost.

[0025] The deposits peeled off inside the hollow tubular material 103 are appropriately removed to the outside through a penetration 105 (see Figs. 3 and 6) formed in the bottom of the hollow tubular material 103. After all the work is completed, the penetrations 104, 105 are closed by welding or the like.

[0026] As shown in FIG. 3, the opening angle θ of the needle 5 relative to the rotation axis X when the rod-shaped body 5A of the needle 5 rotates is less than 90 degrees because the head 10 of the oscillating needle 5 is restricted by the mounting hole 10 of the base plate. This prevents the opening angle θ of the needle 5 from opening too far, that is, to more than 90 degrees, and enables the deposits to be effectively peeled off and removed.

[0027] As described above, in this embodiment, a scraping unit 2 capable of polishing in a narrow working space can be provided by comprising a plurality of rod-shaped bodies 5A, a holding unit H that holds one end side of the plurality of rod-shaped bodies 5A in a freely swingable manner, which is made up of a male screw member 6, a base plate 7, a pressure plate 8 and a lock plate 9, an extension rod 3 connected to the holding unit H, and a rotation drive unit 4 that rotates the extension rod 3.

[0028] In addition, the holding portion H of this embodiment comprises a base plate 7 as a base portion having mounting holes 13 through which the multiple rod-shaped bodies 5A can be inserted, and a clamping plate 8 as a clamping portion that clamps, together with the base plate 7, the heads 10 as a prevention portion for the multiple rod-shaped bodies 5A inserted into the mounting holes 13, thereby making it possible to simplify the swinging structure of the rod-shaped bodies 5A.

[0029] In addition, in this embodiment, a curved portion 11 is provided on the side of the head 10 opposite the clamping plate 8, thereby making it possible to facilitate the swinging motion of the rod-shaped body 5A, thereby improving work efficiency and reducing the load on the rod-shaped body 5A.

[0030] In addition, in this embodiment, the head 10 has a tapered shape on the side, which allows the rod-shaped body 5A to swing smoothly, improving work efficiency and reducing the load on the rod-shaped body 5A.

[0031] In addition, in this embodiment, the curved portion 11 abuts against the clamping plate 8, and there is a gap L between the base plate 7 and the clamping plate 8, thereby stabilizing the oscillating motion of the rod-shaped body 5A and making the structure of the holding portion H simple and compact.

[0032] In addition, in this embodiment, the polishing apparatus 1 is equipped with a scraping unit 2, an extension rod 3 connected to the holding unit H, and a rotation drive unit 4 that rotates the extension rod 3, thereby making it possible to provide a polishing apparatus 1 that is capable of polishing in a narrow working space.

[0033] The present invention is not limited to the above embodiment, and various modifications are possible within the scope of the present invention. For example, a curved surface may be formed on the surface of the pressing plate 8 facing the base plate 7, or the mounting hole 12 may be tapered. [Explanation of symbols]

[0034] 1 Polishing equipment 2. Scraping part (polishing tool) 3 Extension Rod 4 Rotation drive unit 5A Rod-shaped body 6 Male thread part (retaining part) 7 Base plate (base part, holding part) 8 Retaining plate (retaining part, holding part) 9 Lock plate (retaining part) 11 Curved part 13 Mounting hole H holding part L spacing

Claims

1. A plurality of rod-shaped bodies; A holding portion that holds one end side of the plurality of rod-shaped bodies so as to be able to swing freely; A grinding tool comprising:

2. The holding portion is A base portion having mounting holes through which the plurality of rod-shaped bodies can be inserted; a retaining portion that, together with the base portion, holds the retaining portions of the rod-shaped bodies inserted into the mounting holes; 2. The abrasive tool according to claim 1, further comprising:

3. 3. The grinding tool according to claim 2, wherein the retaining portion has a curved portion on a side opposite to the pressing portion.

4. 3. The grinding tool according to claim 2, wherein the side surface of the retaining portion is tapered.

5. The curved surface portion abuts against the pressing portion, 4. The grinding tool according to claim 3, further comprising a gap between the base portion and the pressing portion.

6. The grinding tool according to claim 1 , An extension rod connected to the holding portion; and a rotation drive unit that rotates the extension rod.

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