JPS6027403Y2 - magnetizing yoke - Google Patents
magnetizing yokeInfo
- Publication number
- JPS6027403Y2 JPS6027403Y2 JP13000080U JP13000080U JPS6027403Y2 JP S6027403 Y2 JPS6027403 Y2 JP S6027403Y2 JP 13000080 U JP13000080 U JP 13000080U JP 13000080 U JP13000080 U JP 13000080U JP S6027403 Y2 JPS6027403 Y2 JP S6027403Y2
- Authority
- JP
- Japan
- Prior art keywords
- yoke
- magnetizing
- magnetizing yoke
- permanent magnet
- magnetic
- 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
- Magnetic Brush Developing In Electrophotography (AREA)
Description
【考案の詳細な説明】
本考案は電子写真装置や静電記録装置における現像用磁
石ロールやクリーニング用磁石ロール等に用いられる直
径に対し長さが２倍以上ある長尺磁石を着磁するための
着磁ヨークに関する。[Detailed description of the invention] This invention is for magnetizing long magnets whose length is more than twice the diameter used in developing magnet rolls, cleaning magnet rolls, etc. in electrophotographic devices and electrostatic recording devices. The present invention relates to a magnetizing yoke.
一般に乾式電子複写機においては、鉄粉キャリアと非磁
性トナーからなる二成分系現像剤あるいは一威分系の磁
性トナーなどの磁性現像剤を永久磁石ロールの表面に吸
着搬送して磁気ブラシを形威して現像が行なわれる。Generally, in a dry type electronic copying machine, a magnetic brush is formed by adsorbing and conveying a two-component developer consisting of an iron powder carrier and a non-magnetic toner, or a magnetic developer such as a one-component magnetic toner onto the surface of a permanent magnet roll. Developing is performed under pressure.
この永久磁石ロールにおいては、例えば特公昭５５−６
９０７号公報に記載されているようなバードフェライト
製の一体の円筒状永久磁石が用いられており、表面に軸
方向に伸長する複数個の磁極を有している。In this permanent magnet roll, for example,
A one-piece cylindrical permanent magnet made of bird ferrite as described in Japanese Patent No. 907 is used, and has a plurality of axially extending magnetic poles on its surface.
このような長尺磁石を着磁するための着磁ヨークとして
は、例えば実開昭５ｌ−１４８０Ｒ公報に記載されてい
るように純鉄又は電磁軟鋼などの磁気的にソフトな材料
からなるヨーク本体を長さ方向に２分割して、着磁する
磁石の外径に応じて内径をえぐり、溝を形威して巻線を
行なったものが知られている。As a magnetizing yoke for magnetizing such a long magnet, a yoke body made of a magnetically soft material such as pure iron or electromagnetic mild steel is used, for example, as described in Japanese Utility Model Application Publication No. 51-1480R. It is known that the wire is divided into two in the length direction, the inner diameter is hollowed out according to the outer diameter of the magnet to be magnetized, and a groove is formed to wind the wire.
ところで永久磁石ロールとしては、上記の軸方向に伸長
する複数個の磁石を有する永久磁石を用いたものの他に
、現像剤の横方向への搬送を行なうために例えば実公昭
５３−２９４６３号公報に記載されているような円柱状
永久磁石の表面に螺旋状に着磁したものが現像用ロール
として用にられつつある。By the way, as a permanent magnet roll, in addition to the one using a permanent magnet having a plurality of magnets extending in the axial direction, there is also a permanent magnet roll that uses a permanent magnet having a plurality of magnets extending in the axial direction. A cylindrical permanent magnet as described above, whose surface is spirally magnetized, is being used as a developing roll.
また時間昭５５−３２０４７号公報によれば、スパイラ
ル状に磁極を配置した磁石ローラーを電子写真装置のク
リーナ一部分に用いるとも知られている。According to Japanese Patent No. 55-32047, it is also known that a magnetic roller having magnetic poles arranged in a spiral manner is used as a part of the cleaner of an electrophotographic apparatus.
通常、長尺磁石に螺旋状の着磁を施すための着磁ヨーク
としては第１図に示すものが用あられている。Usually, a magnetizing yoke shown in FIG. 1 is used to apply spiral magnetization to a long magnet.
この着磁ヨークは上述の如くの磁気的にソフトな材料か
らなる円筒状のヨーク本体１の内周面に所定のピッチで
螺旋状の溝２を形威し、溝２内にコイル（図示せず）を
巻回して構成されている。This magnetizing yoke has a spiral groove 2 formed at a predetermined pitch on the inner peripheral surface of a cylindrical yoke body 1 made of a magnetically soft material as described above, and a coil (not shown) is formed in the groove 2. It is constructed by winding a
しかしながらこの着磁ヨークにおいては、溝加工に多大
な工数を要し、よって製作費が極めて大となる。However, in this magnetizing yoke, a large number of man-hours are required for groove machining, and therefore the manufacturing cost is extremely high.
また加工寸法のバラツキも大となるため着磁後の磁極の
位置ずれや磁力のバラツキが生じやすく高品質の長尺磁
石を得ることが困難である等の問題があった。In addition, since there is a large variation in processing dimensions, there is a problem that it is difficult to obtain a high quality elongated magnet because the position of the magnetic poles after magnetization tends to shift and the magnetic force tends to vary.
本考案の目的は、上述の従来の着磁ヨークの欠点を解消
し、製作が容易でかつ良好な着磁が行なえる着磁ヨーク
を提供することである。An object of the present invention is to provide a magnetizing yoke that eliminates the drawbacks of the conventional magnetizing yoke described above, is easy to manufacture, and can perform good magnetization.
以下本考案の着磁ヨークを図面により説明する。The magnetizing yoke of the present invention will be explained below with reference to the drawings.
第２図は本考案の着磁ヨークの側面図、第３図は第２図
のＡ−Ａ矢視図である。FIG. 2 is a side view of the magnetizing yoke of the present invention, and FIG. 3 is a view taken along the line A--A in FIG.
図中３は磁気的ソフトな材料からなる断面矩形状のコイ
ル部材であり、所定のピッチで螺旋状に巻回されており
、所定の磁極数に相当する本数（第２図では１本のみ示
す）だけ所定間隔をおいて互いに平行に支持部材４の内
周面に固定されている。3 in the figure is a coil member with a rectangular cross section made of a magnetically soft material, which is spirally wound at a predetermined pitch, and the number of coil members corresponds to the predetermined number of magnetic poles (only one is shown in Fig. 2). ) are fixed to the inner circumferential surface of the support member 4 in parallel with each other at predetermined intervals.
コイル部材の具体例としては純鉄や電磁鋼板も使用でき
るが、強度的な点からまた角材がそのまま使用できる点
からバネ鋼（ｓｕｐ）が好ましく、またバネ鋼は磁気的
な点から何ら問題はない。Although pure iron and electromagnetic steel plates can be used as specific examples of coil members, spring steel (SUP) is preferable from the viewpoint of strength and the fact that the square material can be used as is, and spring steel does not pose any problems from a magnetic point of view. do not have.
また支持部材の形状も円筒状に一体に形成したものに限
らず円周方向および／又は軸方向に複数個に分割したも
のでも差しつかえない。Further, the shape of the support member is not limited to being integrally formed into a cylindrical shape, but may be divided into a plurality of pieces in the circumferential direction and/or the axial direction.
上記の着磁ヨークを使用する場合、例えば第４図に示す
ような軸５に円筒状フェライト磁石６を固着してなる永
久磁石ロール７を挿入し、コイル部材３に数千アンペア
程度のパルス電流を流すことにより、螺旋状の瞬間一体
着磁を行なうことができる。When using the above magnetizing yoke, for example, a permanent magnet roll 7 consisting of a cylindrical ferrite magnet 6 fixed to the shaft 5 as shown in FIG. 4 is inserted, and a pulse current of about several thousand amperes is applied to the coil member 3. By flowing , it is possible to perform instantaneous helical magnetization.
本考案の具体例を次に説明する。A specific example of the present invention will be described below.
外径２９ｒｒｖｎ、長さが２８ｏＴＩｒＩＩｔの等方性
バリウムフェライト磁石を有する第４図に示す永久磁石
ロールを、内径２９．１閣、長さ３８０圏の本考案の着
磁ヨーク内に挿入しコイル部材にコンデンサー着磁機か
らパルス電流を流して６極に瞬間一体着磁を行なったと
ころ、磁石表面上における磁束密度が約１１００Ｇで長
さ方向のバラツキが２０Ｇ以下の永久磁石ロールが得ら
れた。A permanent magnet roll shown in FIG. 4 having an isotropic barium ferrite magnet with an outer diameter of 29rrvn and a length of 28oTIrIIt is inserted into the magnetized yoke of the present invention having an inner diameter of 29.1mm and a length of 380mm to form a coil member. When a pulse current was applied from a capacitor magnetizer to instantaneously magnetize the six poles, a permanent magnet roll with a magnetic flux density of about 1100 G on the magnet surface and a longitudinal variation of 20 G or less was obtained.
なお第４図において磁極は破線で示している。In addition, in FIG. 4, the magnetic poles are shown by broken lines.
以上に記述の如く、本考案の着磁ヨークは、製作が容易
かつ製作コストも低くてすみ、そして高品質の永久磁石
ロールが得られるというすぐれた効果を有している。As described above, the magnetizing yoke of the present invention has excellent effects in that it is easy to manufacture, the manufacturing cost is low, and a high-quality permanent magnet roll can be obtained.
第１図は従来の着磁ヨークの斜視図、第２図は本考案の
着磁ヨークの側面図、第３図は第２図のＡ−Ａ矢視図、
第４図は永久磁石ロールの斜視図である。
３：コイル部材、４：支持部材。FIG. 1 is a perspective view of a conventional magnetizing yoke, FIG. 2 is a side view of the magnetizing yoke of the present invention, and FIG. 3 is a view taken along arrow A-A in FIG.
FIG. 4 is a perspective view of the permanent magnet roll. 3: coil member, 4: support member.
Claims (1)
旋状の着磁をするための着磁ヨークにおいて、ヨーク本
体の内周面に所定の間隔をおいて複数本のコイル部材を
螺旋状に巻回固定したことを特徴とする着磁ヨーク。 ２ ヨーク本体が断面円形の内面を有し、コイル部材と
して断面矩形状のバネ鋼を用いたことを特徴とする実用
新案登録請求の範囲第１項記載の着磁ヨーク。[Claims for Utility Model Registration] 1. In a magnetizing yoke for spirally magnetizing the surface of a long magnet whose length is at least twice the diameter, a predetermined interval is provided on the inner peripheral surface of the yoke body. A magnetizing yoke characterized in that a plurality of coil members are wound and fixed in a spiral manner. 2. The magnetized yoke according to claim 1, wherein the yoke body has an inner surface with a circular cross section, and the coil member is made of spring steel with a rectangular cross section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13000080U JPS6027403Y2 (en) | 1980-09-12 | 1980-09-12 | magnetizing yoke |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13000080U JPS6027403Y2 (en) | 1980-09-12 | 1980-09-12 | magnetizing yoke |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5754165U JPS5754165U (en) | 1982-03-30 |
| JPS6027403Y2 true JPS6027403Y2 (en) | 1985-08-19 |
Family
ID=29490328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13000080U Expired JPS6027403Y2 (en) | 1980-09-12 | 1980-09-12 | magnetizing yoke |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6027403Y2 (en) |
-
1980
- 1980-09-12 JP JP13000080U patent/JPS6027403Y2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5754165U (en) | 1982-03-30 |
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