JP4817478B2

JP4817478B2 - Buffing tool

Info

Publication number: JP4817478B2
Application number: JP2000038585A
Authority: JP
Inventors: 幸嗣金子
Original assignee: KEITECH CO Ltd
Current assignee: KEITECH CO Ltd
Priority date: 2000-02-16
Filing date: 2000-02-16
Publication date: 2011-11-16
Anticipated expiration: 2020-02-16
Also published as: JP2001225275A

Description

【０００１】
【発明の属する技術分野】
本発明は、例えば自動車のボディ等の研磨に用いるバフ研磨具に関するものである。
【０００２】
【従来の技術】
バフ研磨具は、モータによって駆動される出力軸によりバフが高速回転し、被研磨面を研磨する。出力軸の先端には回転盤が設けられ、この回転盤にバフが着脱自在に取り付けられる。回転盤には、ゴム、プラスチック等の弾性材料が用いられる。通常、これらの材料を円盤形に成形し、その中心位置に出力軸を固定する。
バフ研磨具を使用する場合、被研磨面に対しバフ面を僅かに傾けて押し当てると、回転盤が後方へ撓み、回転盤の反発力によってバフを押し返し、被研磨面とバフ面との間に摩擦力を発生させる。
【０００３】
【発明が解決しようとする課題】
しかしながら、このような従来のバフ研磨具を使用する場合、回転盤の弾性力が大きすぎるために研磨作業が行いにくくなることがある。例えば、曲面や凹凸面を研磨する場合、回転盤が被研磨面に沿って変形しにくいことから、バフ面と被研磨面との接触面積が狭くなり、研磨作業に時間がかかる。
【０００４】
これに対し、回転盤の材質をより柔軟なものにすることが考えられるが、回転盤全体を柔軟にすると、回転盤の耐久性が低下し、また、出力軸と回転盤とを強固に固定するのが困難になる。
【０００５】
そこで、本発明はこのような現状に鑑みなされたもので、回転盤に適度な柔軟性をもたせることで被研磨面を迅速かつ均一に研磨し、しかも、回転盤の耐久性を高め、出力軸と回転盤とを強固に固定することを可能にしたバフ研磨具を提供することを目的とする。
【０００６】
【課題を解決するための手段】
前記課題を解決するための本発明によるバフ研磨具は、
ハウジングに収納されるモータと、
前記モータにより駆動される出力軸と、
前記出力軸の先端部に固定される回転盤と、
前記回転盤に着脱可能に取り付けられるバフとを有するバフ研磨具において、
前記回転盤の外周部に所定の間隔を保って複数の貫通孔を形成したことを特徴とする。
【０００７】
本発明のバフ研磨具によると、貫通孔によって回転盤の外周部に適度な柔軟性が得られる。すなわち、回転盤の周方向に力が加わると、隣り合う貫通孔の間に形成されるリブが盤面に対し上下左右に容易に撓む。これにより、曲面や凹凸面等を研磨する場合でも、バフ面が被研磨面に沿って撓みやすくなり、作業性を向上させることができる。
また、回転盤の中央部に比べて外周部の柔軟性を選択的に高めるものであるため、回転盤を比較的硬い材質の材料で形成することができる。このため、回転盤の耐久性が良好になり、出力軸と回転盤との固定強度を高めることができる。
【０００８】
前記貫通孔の孔形状は、円形、長円形、楕円形等の角無し形状であるのが望ましい。貫通孔の孔形状が長方形や扇形等の角有り形状であると、研磨時に回転盤の孔の角部周辺に応力が集中し、回転盤が破損しやすくなるためである。
これに対し、貫通孔の孔形状を角無し形状にすることで、回転盤の周方向に加わる力が分散するため、回転盤の耐久性が向上し、研磨時の作業性が向上する。
【０００９】
前記回転盤の重心位置は、盤面の中心に一致させるとよい。具体的には、各貫通孔の孔形状を同一にし、かつ、盤面中心（出力軸）から一定の半径を有する円周上に各貫通孔を配置するとよい。回転盤の振動等を確実に防止し、作業性を向上させるためである。
【００１０】
前記貫通孔のうち、周方向に隣り合う孔の間に形成されるリブの幅Ｌが１０≦Ｌ≦１５ｍｍの範囲内であることが特に望ましい。前記範囲に設定すると、発明者らの実験結果である表１の実験例４および５に示されるように、柔軟性、研磨力、作業性のすべてがきわめて良好となるためである。
【００１１】
また、本発明のバフ研磨具の回転盤は、バフ研磨具の出力軸の先端部に、所定のバフを着脱自在に取り付け可能にしたバフ研磨具の回転盤であって、前記回転盤の外周部に所定の間隔を保って複数の貫通孔を形成したことを特徴とする。
【００１２】
【発明の実施の形態】
以下、本発明の実施の形態を図面に基づいて説明する。
図１に示すように、バフ研磨具１は、絶縁性のハウジング２に駆動用のモータ３を内蔵している。モータ３の出力軸８の先端に回転盤１０が固定される。ハウジング２の側面にはメイングリップ４、スイッチ５およびサブグリップ６が設けられる。メイングリップ４の後端部からは電源コード７が取り出されている。
【００１３】
回転盤１０の前面（図１で下面）には、バフ１２が着脱自在に取り付けられる。バフ１２は、スポンジ、布等からなるもので、その前面（バフ面）が被研磨面に押し当てられる。
【００１４】
図２および図３に示すように、円盤形の回転盤１０は、ゴム、プラスチック等の弾性材料からなるもので、回転盤１０の中央に筒状のジョイント１３が一体に形成される。出力軸８の先端にジョイント１３を差し込むと、回転盤１０の回転面に出力軸８がほぼ直交する関係になる。
【００１５】
回転盤１０の外周部には、周方向に所定の間隔を保って長円形の貫通孔Ｈが形成される。各貫通孔Ｈは同一形状になっており、各孔の間にリブ１０ａが形成されている。
各孔貫通孔Ｈの位置は、出力軸８を中心とする円周上にほぼ等間隔に配置される。これにより、出力軸８の回転軸に回転盤１０の重心が一致し、回転盤１０の回転時の振動が防止される。
【００１６】
回転盤１０およびバフ１２の対向面には、面ファスナ１５が固定される。面ファスナ１５のフック部とループ部とが互いに絡み合うか、または引き離されることで、両者が着脱自在になっている。作業者は、研磨目的に応じて研磨力の異なる各種のバフ１２を面ファスナ１５に取り付ける。
【００１７】
バフ研磨具１を使用する場合、まず、回転盤１０にバフ１２を取り付け、バフ面に、研磨用のワックス、研磨剤等を塗布し、しみ込ませる。
次いで、電源コード３を商用電源に接続し、メイングリップ４およびサブグリップ６を持ってスイッチ５をＯＮにする。すると、駆動用モータ３の出力軸８および回転盤１０が回転し、それに伴ってバフ１２も回転することになる。
【００１８】
研磨作業を行う場合、図４に示すように、被研磨面Ｔに対してバフ面１２ａを僅かに傾け、バフ面１２ａの外周部を被研磨面Ｔに押し当てるようにする。すると、回転盤１０が撓んで、その反発力によりバフ１２を押し、被研磨面Ｔとバフ面１２ａとの間に適度な摩擦力を生じる。
【００１９】
回転盤１０によれば、貫通孔Ｈによって回転盤１０の外周部がより撓みやすくなっているため、被研磨面Ｔとバフ面１２ａとの接触面積が大きくなり、均質かつ迅速に研磨作業を行うことが可能になる。
また、曲面や凹凸面を研磨する場合でも、バフ面１２ａが被研磨面Ｔの形状に沿って変形しやすいため、研磨ムラが生じにくい。
【００２０】
次に、回転盤の貫通孔の大きさについての実験例を説明する。
従来の一般的なゴム製回転盤に各種サイズの貫通孔を形成し、柔軟性、研磨力および作業性について評価した。
実験には、直径１５０ｍｍ、ゴム硬度７０（JIS K6253 加硫ゴム及び熱可塑性ゴムの硬さ試験方法に準拠）の回転盤を使用した。回転盤の貫通孔の位置は、出力軸８を中心とする円周上に貫通孔の中心が並ぶようにし、かつ、貫通孔の径方向の孔径Ｒ1を４５ｍｍとし、回転盤の外径端から貫通孔までの距離Ｒ2を１０ｍｍとした（図５参照）。
そして、隣り合う貫通孔の間隔（リブ幅）Ｌの長さを変えて、柔軟性、研磨力および作業性の各項目について貫通孔が存在ない場合と比較した。
なお、「柔軟性」は研磨時の回転盤の変形のしやすさ、「研磨力」は被研磨面とバフ面との摩擦抵抗の大きさ、「作業性」は研磨時のバフ研磨具の暴れやすさを意味する。結果を表１に示す。
【００２１】
【表１】

表１中、「△」は、孔なし（実験例１）とほぼ同等、「○」は良好、「◎」はきわめて良好であることを示す。
表１に示すように、リブ幅Ｌが３０ｍｍの場合、柔軟性、研磨力および作業性ともに孔なし（実験例１）の場合と評価は変わらないが、リブ幅Ｌが２０ｍｍ以上になると、実験例１よりも柔軟性、研磨力および作業性の各評価が向上した。
一方、リブ幅Ｌが５ｍｍになると、リブ幅１０ｍｍに比べ研磨力の評価が低下するものとなった。
これらの実験結果より、周方向に隣り合う貫通孔Ｈの間のリブ幅Ｌを５≦Ｌ≦２０の範囲に設定すると、柔軟性、研磨力および作業性がすべて孔なし（実験例１）よりも優れたものになり、研磨作業が快適になることが判る。
【００２２】
なお、前記回転盤１０では、貫通孔Ｈの形状を長円形にしているが、孔形状はこれに限られず、楕円形、円形、四角形、三角形、扇形等に変更してもよい。特に、円形、楕円形等の角無し形状にすると、回転盤の角部への応力集中が回避され、耐久性をより高めることができる。
また、前記バフ研磨具１では、電気モータ式の研磨具に本発明を適用したが、エアモータ式の研磨具に本発明を適用することも可能である。
【００２３】
【発明の効果】
以上説明したように、本発明のバフ研磨具によれば、次のような優れた効果を奏する。
(a) 回転盤の柔軟性が良好になり、被研磨面とバフ面との接触面積を大きく保つことができるため、均質かつ迅速な研磨作業が可能になる。
(b) 曲面や凹凸面を磨く場合でも、回転盤が被研磨面に沿って変形しやすいため、研磨ムラが少なくなる。
(c) 回転盤を比較的硬い材料で形成することができ、耐久性を高めることができる。
(d) 回転盤と出力軸との強固に固定することができ、作業の信頼性および安全性が高まる。
【図面の簡単な説明】
【図１】本発明の実施の形態によるバフ研磨具を示す斜視図である。
【図２】本発明の実施の形態によるバフ研磨具の回転盤を示す平面図である。
【図３】本発明の実施の形態によるバフ研磨具の回転盤を示す側面図である。
【図４】本発明の実施の形態によるバフ研磨具の回転盤の使用状態を示す側面図である。
【図５】実験例に使用したバフ研磨具の回転盤を説明するための平面図である。
【符号の説明】
１バフ研磨具
２ハウジング
３モータ
４メイングリップ
６サブグリップ
８出力軸
１０回転盤
１２バフ[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a buffing tool used for polishing a body of an automobile, for example.
[0002]
[Prior art]
In the buffing tool, the buff is rotated at a high speed by an output shaft driven by a motor, and the surface to be polished is polished. A rotating disk is provided at the tip of the output shaft, and a buff is detachably attached to the rotating disk. An elastic material such as rubber or plastic is used for the turntable. Usually, these materials are formed into a disk shape, and the output shaft is fixed at the center position.
When using a buffing tool, if the buffing surface is tilted slightly against the surface to be polished, the rotating disk will bend backward and the buff will be pushed back by the repulsive force of the rotating disk, so that there is a gap between the surface to be polished and the buffing surface. Generate frictional force.
[0003]
[Problems to be solved by the invention]
However, when such a conventional buffing tool is used, it may be difficult to perform the polishing operation because the elastic force of the rotating disk is too large. For example, when a curved surface or an uneven surface is polished, the rotating disk is difficult to deform along the surface to be polished, so that the contact area between the buff surface and the surface to be polished is narrowed, and the polishing operation takes time.
[0004]
On the other hand, it may be possible to make the material of the rotating disk more flexible, but if the entire rotating disk is made flexible, the durability of the rotating disk will be reduced, and the output shaft and the rotating disk will be firmly fixed. It becomes difficult to do.
[0005]
Therefore, the present invention has been made in view of such a current situation, by polishing the surface to be polished quickly and uniformly by giving the rotating disk appropriate flexibility, and further improving the durability of the rotating disk, It is an object of the present invention to provide a buffing tool capable of firmly fixing a rotating disk and a rotating disk.
[0006]
[Means for Solving the Problems]
A buffing tool according to the present invention for solving the above-mentioned problems is
A motor housed in a housing;
An output shaft driven by the motor;
A turntable fixed to the tip of the output shaft;
In the buffing tool having a buff detachably attached to the rotating disk,
A plurality of through holes are formed in the outer peripheral portion of the rotating disk at predetermined intervals.
[0007]
According to the buffing tool of the present invention, moderate flexibility can be obtained at the outer peripheral portion of the rotating disk by the through hole. That is, when a force is applied in the circumferential direction of the rotating disk, ribs formed between adjacent through holes are easily bent vertically and horizontally with respect to the disk surface. Thereby, even when a curved surface or an uneven surface is polished, the buff surface is easily bent along the surface to be polished, and workability can be improved.
Moreover, since the flexibility of the outer peripheral portion is selectively enhanced as compared with the central portion of the rotating disk, the rotating disk can be formed of a relatively hard material. For this reason, durability of a turntable becomes favorable and the fixing strength of an output shaft and a turntable can be raised.
[0008]
The hole shape of the through-hole is preferably a non-cornered shape such as a circle, an oval, or an ellipse. This is because when the through hole has a rectangular shape such as a rectangle or a sector, stress concentrates around the corner of the hole of the rotating disk during polishing, and the rotating disk is likely to be damaged.
On the other hand, since the force applied in the circumferential direction of the rotating disk is dispersed by making the hole shape of the through hole non-cornered, durability of the rotating disk is improved and workability at the time of polishing is improved.
[0009]
The position of the center of gravity of the turntable is preferably matched with the center of the board surface. Specifically, the through holes may be arranged on the circumference having the same shape from the center of the board surface (output shaft) and having a constant radius. This is to reliably prevent vibration of the rotating disk and improve workability.
[0010]
Of the through-holes, it is particularly desirable that the width L of ribs formed between holes adjacent in the circumferential direction is within a range of 10 ≦ L ≦ 15 mm . This is because, when set to the above range, as shown in Experimental Examples 4 and 5 of Table 1 which are the experimental results of the inventors, all of flexibility, polishing power, and workability are extremely good.
[0011]
Further, the rotating table of the buffing tool of the present invention is a rotating table of the buffing tool in which a predetermined buff can be detachably attached to the tip of the output shaft of the buffing tool, and the outer periphery of the rotating table A plurality of through-holes are formed at predetermined intervals in the part.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the buffing tool 1 includes a drive motor 3 in an insulating housing 2. A turntable 10 is fixed to the tip of the output shaft 8 of the motor 3. A main grip 4, a switch 5 and a sub grip 6 are provided on the side surface of the housing 2. A power cord 7 is taken out from the rear end of the main grip 4.
[0013]
A buff 12 is detachably attached to the front surface (lower surface in FIG. 1) of the turntable 10. The buff 12 is made of sponge, cloth or the like, and its front surface (buff surface) is pressed against the surface to be polished.
[0014]
As shown in FIGS. 2 and 3, the disk-shaped rotating disk 10 is made of an elastic material such as rubber or plastic, and a cylindrical joint 13 is integrally formed at the center of the rotating disk 10. When the joint 13 is inserted into the tip of the output shaft 8, the output shaft 8 is substantially orthogonal to the rotation surface of the rotating disk 10.
[0015]
An oval through hole H is formed in the outer peripheral portion of the turntable 10 at a predetermined interval in the circumferential direction. Each through hole H has the same shape, and a rib 10a is formed between the holes.
The positions of the hole through holes H are arranged at almost equal intervals on the circumference around the output shaft 8. As a result, the center of gravity of the turntable 10 coincides with the rotation axis of the output shaft 8, and vibration during rotation of the turntable 10 is prevented.
[0016]
A surface fastener 15 is fixed to the opposed surfaces of the rotary disk 10 and the buff 12. The hook part and the loop part of the hook-and-loop fastener 15 are intertwined with each other or separated from each other, so that both can be attached and detached. The operator attaches various buffs 12 having different polishing forces to the surface fastener 15 according to the purpose of polishing.
[0017]
When the buffing tool 1 is used, first, the buff 12 is attached to the turntable 10, and a wax, a polishing agent, or the like for polishing is applied to the buff surface and soaked.
Next, the power cord 3 is connected to a commercial power source, and the switch 5 is turned ON with the main grip 4 and the sub grip 6. Then, the output shaft 8 and the rotating disk 10 of the driving motor 3 rotate, and the buff 12 rotates accordingly.
[0018]
When performing the polishing operation, as shown in FIG. 4, the buff surface 12 a is slightly inclined with respect to the surface to be polished T, and the outer peripheral portion of the buff surface 12 a is pressed against the surface T to be polished. Then, the turntable 10 bends and pushes the buff 12 by the repulsive force, thereby generating an appropriate frictional force between the polished surface T and the buff surface 12a.
[0019]
According to the turntable 10, since the outer peripheral portion of the turntable 10 is more easily bent by the through hole H, the contact area between the surface to be polished T and the buff surface 12a is increased, and the polishing operation is performed uniformly and quickly. It becomes possible.
Further, even when a curved surface or an uneven surface is polished, the buff surface 12a is easily deformed along the shape of the surface T to be polished, so that uneven polishing is less likely to occur.
[0020]
Next, an experimental example regarding the size of the through hole of the rotating disk will be described.
Through holes of various sizes were formed in a conventional general rubber rotating disk, and the flexibility, polishing power and workability were evaluated.
In the experiment, a rotating disk having a diameter of 150 mm and a rubber hardness of 70 (conforming to the hardness test method of JIS K6253 vulcanized rubber and thermoplastic rubber) was used. The position of the through hole of the turntable is such that the center of the through hole is aligned on the circumference centering on the output shaft 8, and the radial diameter R1 of the through hole is 45 mm, from the outer diameter end of the turntable. The distance R2 to the through hole was 10 mm (see FIG. 5).
And the length of the space | interval (rib width) L of an adjacent through-hole was changed and it compared with the case where a through-hole does not exist about each item of a softness | flexibility, polishing power, and workability | operativity.
“Flexibility” is the ease of deformation of the rotating disk during polishing, “Abrasive power” is the magnitude of the frictional resistance between the surface to be polished and the buff surface, and “Workability” is the buffing tool of the polishing It means ease of rampage. The results are shown in Table 1.
[0021]
[Table 1]

In Table 1, “Δ” indicates almost the same as that without holes (Experimental Example 1), “◯” indicates good, and “」 ”indicates very good.
As shown in Table 1, when the rib width L is 30 mm, the evaluation is not different from the case of no holes (Experimental Example 1) in terms of flexibility, polishing power and workability, but when the rib width L is 20 mm or more, the experiment Each evaluation of flexibility, polishing power and workability was improved as compared with Example 1.
On the other hand, when the rib width L was 5 mm, the evaluation of the polishing power was lower than that of the rib width 10 mm.
From these experimental results, when the rib width L between the through holes H adjacent in the circumferential direction is set in the range of 5 ≦ L ≦ 20, flexibility, polishing power and workability are all from that without holes (Experimental Example 1). It can be seen that the polishing work becomes comfortable.
[0022]
In the rotary disk 10, the shape of the through hole H is an oval, but the hole shape is not limited to this, and may be changed to an ellipse, a circle, a quadrangle, a triangle, a fan, or the like. In particular, when a shape without a corner such as a circle or an ellipse is used, stress concentration on the corner of the rotating disk can be avoided, and durability can be further enhanced.
In the buffing tool 1, the present invention is applied to an electric motor type polishing tool. However, the present invention can also be applied to an air motor type polishing tool.
[0023]
【Effect of the invention】
As described above, according to the buffing tool of the present invention, the following excellent effects can be obtained.
(a) Since the rotating disk has good flexibility and the contact area between the surface to be polished and the buff surface can be kept large, uniform and quick polishing work can be performed.
(b) Even when a curved surface or an uneven surface is polished, since the rotating disk is easily deformed along the surface to be polished, uneven polishing is reduced.
(c) The turntable can be formed of a relatively hard material, and durability can be enhanced.
(d) The rotating disk and the output shaft can be firmly fixed, and the work reliability and safety are improved.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a buffing tool according to an embodiment of the present invention.
FIG. 2 is a plan view showing a turntable of a buffing tool according to an embodiment of the present invention.
FIG. 3 is a side view showing a turntable of a buffing tool according to an embodiment of the present invention.
FIG. 4 is a side view showing a use state of the rotary table of the buffing tool according to the embodiment of the present invention.
FIG. 5 is a plan view for explaining a turntable of a buffing tool used in an experimental example.
[Explanation of symbols]
1 Buffing tool 2 Housing 3 Motor 4 Main grip 6 Sub-grip 8 Output shaft 10 Turntable 12 Buff

Claims

A motor housed in a housing having a grip, an output shaft driven by the motor, a rotating plate made of an elastic material such as rubber and plastic fixed to the tip of the output shaft, and a detachable attachment to the rotating plate In a buffing tool having a buff that can be attached, a plurality of through holes are formed at predetermined intervals on the outer peripheral portion of the rotating disk, and the width of a rib formed between through holes adjacent in the circumferential direction A buffing tool, wherein L is set within a range of 10 ≦ L ≦ 15 mm.

2. The buffing tool according to claim 1, wherein a hole shape of the through-hole is a cornerless shape such as a circle, an oval, or an ellipse.

2. The buffing tool according to claim 1, wherein each of the through holes has the same hole shape and is disposed on a circumference having a certain radius from the center of the board surface.

A rotating table for a buffing tool made of an elastic material such as rubber or plastic that allows a predetermined buff to be detachably attached to the tip of an output shaft of a buffing tool driven by a motor housed in a housing having a grip. A plurality of through holes are formed at predetermined intervals on the outer peripheral portion of the rotating disk, and a width L of a rib formed between through holes adjacent in the circumferential direction is in a range of 10 ≦ L ≦ 15 mm. A buffing tool rotating plate characterized by being set inside.