JPS5839628B2 - magnetic holder - Google Patents
magnetic holderInfo
- Publication number
- JPS5839628B2 JPS5839628B2 JP8852081A JP8852081A JPS5839628B2 JP S5839628 B2 JPS5839628 B2 JP S5839628B2 JP 8852081 A JP8852081 A JP 8852081A JP 8852081 A JP8852081 A JP 8852081A JP S5839628 B2 JPS5839628 B2 JP S5839628B2
- Authority
- JP
- Japan
- Prior art keywords
- permanent magnet
- driver bit
- magnet
- holder
- bit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Landscapes
- Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
Description
【発明の詳細な説明】
本発明は電気スクリュードライバ等の先端に取り付けて
、ネジの締めつけに使用するマグネチックホルダの構造
に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the structure of a magnetic holder that is attached to the tip of an electric screwdriver or the like and used for tightening screws.
ネジをドライバービットに吸着させるために使用する従
来のマグネチックホルダは、保磁力の小さい永久磁石を
使用している。Conventional magnetic holders used to attract screws to driver bits use permanent magnets with low coercive force.
そのため、吸着力を確保するために、ドライバービット
が入る六角穴の端面よりも永久磁石が出る構造にして、
ドライバービットと永久磁石が密着するようにしている
。Therefore, in order to ensure the attraction force, we created a structure in which the permanent magnet protrudes from the end face of the hexagonal hole where the driver bit is inserted.
This ensures that the driver bit and permanent magnet are in close contact.
この構造では、ドライバービットと永久磁石が密着して
いることにより、ネジ締めつけ時の振動で、永久磁石に
衝撃力が加わるので、永久磁石が欠け、吸着力が低下し
て製品寿命が短くなる。With this structure, the driver bit and permanent magnet are in close contact with each other, and the vibrations generated when tightening the screws apply impact force to the permanent magnet, which causes the permanent magnet to chip, reducing the attraction force and shortening the product's lifespan.
本発明の目的は、前述した従来技術の欠点をなくし、永
久磁石の破損を防ぎ、製品寿命を伸すことである。The purpose of the present invention is to eliminate the above-mentioned drawbacks of the prior art, prevent damage to permanent magnets, and extend product life.
即ち、本発明は、残留磁気密度、保磁力の大きい希土類
磁石を用いれば、磁石とドライバービットとの間に若干
の空隙があっても吸着力を確保できることに着目し、ド
ライバービットが永久磁石に当たらない構造を工夫した
ものである。That is, the present invention focuses on the fact that by using a rare earth magnet with high residual magnetic density and coercive force, it is possible to secure an attractive force even if there is a slight gap between the magnet and the driver bit. The structure has been devised so that it does not hit.
以下図示実施例により本発明を説明する。The present invention will be explained below with reference to illustrated embodiments.
第１図は、本発明の一実施例を示す断面図である。FIG. 1 is a sectional view showing one embodiment of the present invention.
図において、１は永久磁石、２はホルダー３は六角シャ
ンクである。In the figure, 1 is a permanent magnet, 2 is a holder 3 is a hexagonal shank.
４はドライバービットが入る六角穴である。4 is a hexagonal hole into which a driver bit is inserted.
永久磁石１は、ドライバービット側の磁石端面が、ドラ
イバービットの入る六角穴４と永久磁石を埋め込む穴の
境界との間に０．３〜０．５朋の空隙が出来る位置に取
りつけである。The permanent magnet 1 is attached at a position where the end face of the magnet on the driver bit side creates a gap of 0.3 to 0.5 mm between the hexagonal hole 4 in which the driver bit is inserted and the boundary of the hole in which the permanent magnet is embedded.
斯かる構造のマグネット式ホルダにすれば、第２図に示
すように、ドライバービット５を装着した時、永久磁石
との間に空隙７が出来るため、ネジ締めつけ作業中の振
動でもドライバービットが永久磁石に当らないので、永
久磁石の破損を防ぐことができる。If a magnetic holder with such a structure is used, as shown in Figure 2, when the driver bit 5 is installed, a gap 7 will be created between the driver bit 5 and the permanent magnet, so that even if vibrations occur during screw tightening work, the driver bit will remain permanently attached. Since it does not hit the magnet, damage to the permanent magnet can be prevented.
ネジの吸着力に関しては、使用する希土類磁石の保磁力
は、アルニコ磁石の保磁力の３〜４倍もあるので、０．
５皿程度の空隙があっても十分な吸着力を確保できる。Regarding the attraction force of screws, the coercive force of the rare earth magnet used is 3 to 4 times that of alnico magnets, so 0.
Sufficient adsorption force can be ensured even if there is a gap of about 5 plates.
実測によると、例えば磁石の径が６皿の場合、長さ３０
１１ｔｍのアルニコ磁石に、ドライバービットを密着さ
せた時のビット先端の磁束密度が１３５０ガウスである
のに対し、希土類磁石では長さ８關でドライバービット
と０．５ ｍｍの空隙を設けてても、ビット先端で１４
００ガウスである。According to actual measurements, for example, if the diameter of the magnet is 6 discs, the length is 30
When a driver bit is placed in close contact with an 11tm alnico magnet, the magnetic flux density at the tip of the bit is 1350 Gauss, whereas with a rare earth magnet, it is 8 inches long and has a 0.5 mm gap with the driver bit. , 14 at the bit tip
00 Gauss.
従って希土類磁石を使用すれば、マグネチックホルダの
全長も短くなるという利点もある。Therefore, the use of rare earth magnets also has the advantage of shortening the overall length of the magnetic holder.
以上のように本発明によれば、ネジ締めつけ時の振動で
も、ドライバービットが永久磁石に当らない構造にした
ので、永久磁石の破損を防ぎ寿命を伸すことができる。As described above, according to the present invention, the structure is such that the driver bit does not come into contact with the permanent magnet even during vibration when tightening a screw, so that damage to the permanent magnet can be prevented and its life can be extended.
第１図は、本発明になるマグネチックホルダの一実施例
を示す縦断側面図、第２図は、本発明のマグネチックホ
ルダにドライバービットを装着した状態を示す縦断側面
図である。
図において、１は希土類磁石（永久磁石）、２はホルダ
ー、３はシャンク、５はドライバービット、７は空隙で
ある。FIG. 1 is a longitudinal sectional side view showing one embodiment of a magnetic holder according to the invention, and FIG. 2 is a longitudinal sectional side view showing a state in which a driver bit is attached to the magnetic holder of the invention. In the figure, 1 is a rare earth magnet (permanent magnet), 2 is a holder, 3 is a shank, 5 is a driver bit, and 7 is a gap.
Claims (1)
ライバービットを磁化する永久磁石と、該永久磁石を保
持するホルダーと、電気スクリュードライバ等の工具に
取り付けるためのシャンク部とから成るマグネット式の
ビットホルダにおいて、前記永久磁石を希土類磁石によ
り形成すると共に、前記希土類磁石と前記ビットホルダ
に装着されるドライバービットとの間に僅かな空隙が生
ずるよう構成したことを特徴とするマグネチックホルダ
。1. A magnetic bit holder consisting of a permanent magnet that magnetizes the driver bit for the purpose of attracting screws to the driver bit, a holder that holds the permanent magnet, and a shank portion that is attached to a tool such as an electric screwdriver. A magnetic holder according to the invention, wherein the permanent magnet is formed of a rare earth magnet, and a slight gap is created between the rare earth magnet and a driver bit attached to the bit holder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8852081A JPS5839628B2 (en) | 1981-06-08 | 1981-06-08 | magnetic holder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8852081A JPS5839628B2 (en) | 1981-06-08 | 1981-06-08 | magnetic holder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57205072A JPS57205072A (en) | 1982-12-16 |
| JPS5839628B2 true JPS5839628B2 (en) | 1983-08-31 |
Family
ID=13945099
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8852081A Expired JPS5839628B2 (en) | 1981-06-08 | 1981-06-08 | magnetic holder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5839628B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040231468A1 (en) * | 2003-05-23 | 2004-11-25 | Mark Odachowski | Hand or automatic driven tool for attaching screwed anchors |
-
1981
- 1981-06-08 JP JP8852081A patent/JPS5839628B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57205072A (en) | 1982-12-16 |
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