JPH0751765Y2 - Shaft for magnet roll - Google Patents

Shaft for magnet roll

Info

Publication number
JPH0751765Y2
JPH0751765Y2 JP1988006079U JP607988U JPH0751765Y2 JP H0751765 Y2 JPH0751765 Y2 JP H0751765Y2 JP 1988006079 U JP1988006079 U JP 1988006079U JP 607988 U JP607988 U JP 607988U JP H0751765 Y2 JPH0751765 Y2 JP H0751765Y2
Authority
JP
Japan
Prior art keywords
shaft
magnet
present
magnet roll
flexible plastic
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 - Lifetime
Application number
JP1988006079U
Other languages
Japanese (ja)
Other versions
JPH01112006U (en
Inventor
正俊 平井
哲夫 浅野
清 加藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kaneka Corp
Original Assignee
Kaneka Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kaneka Corp filed Critical Kaneka Corp
Priority to JP1988006079U priority Critical patent/JPH0751765Y2/en
Publication of JPH01112006U publication Critical patent/JPH01112006U/ja
Application granted granted Critical
Publication of JPH0751765Y2 publication Critical patent/JPH0751765Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Description

【考案の詳細な説明】 「産業上の利用分野」 本考案は可撓性プラスチックマグネットロール用シャフ
トに関し、更に詳しくは、円筒状の可撓性プラスチック
マグネットへの挿入が容易で且つ該マグネットの外周長
手方向の寸法精度を高め、磁力のバラツキを改善した可
撓性プラスチックマグネットロール用シャフトに関す
る。
DETAILED DESCRIPTION OF THE INVENTION "Industrial field of application" The present invention relates to a shaft for a flexible plastic magnet roll, and more specifically, it is easy to insert into a cylindrical flexible plastic magnet and the outer circumference of the magnet. The present invention relates to a shaft for a flexible plastic magnet roll, which has improved dimensional accuracy in the longitudinal direction and has improved dispersion of magnetic force.

「従来技術と問題点」 従来、この種のマグネットロールは、断面が多角形のシ
ャフトの周りに、極数分の樹脂又はゴムマグネットを同
形状又は異形状に押出したマグネットを所要数貼り付
け、その外周にアルミ、SUS304等の非磁性材料からなる
スリーブを取り付け、複写機等において粉状現像剤等の
搬送に用いられる。しかし、上記の如きマグネットロー
ルにあっては、多角形断面のシャフトに多数個のマグネ
ットを装着するため、所謂フレ(曲げ)が発生し易く、
これは磁力の長手方向のバラツキの原因となり、均一な
画像が得られず、また磁極数だけマグネットの貼り合わ
せが必要で、手間がかかり製造コストが高くなる。
“Prior art and problems” Conventionally, this type of magnet roll has a polygonal cross-section around a shaft and a required number of magnets obtained by extruding resin or rubber magnets of the same number of poles in the same shape or different shapes, A sleeve made of a non-magnetic material such as aluminum or SUS304 is attached to the outer periphery of the sleeve, and is used to convey powdery developer in a copying machine or the like. However, in the magnet roll as described above, since a large number of magnets are mounted on the shaft having a polygonal cross section, so-called flex (bending) is likely to occur,
This causes variations in the magnetic force in the longitudinal direction, a uniform image cannot be obtained, and it is necessary to attach the magnets by the number of magnetic poles, which is troublesome and the manufacturing cost is high.

一方、シャフトに短い円筒状マグネットを複数個継ぎ足
したものも実施されているが、継ぎ目に磁力不連続ゾー
ンが現われ、均一な画像が得られない。かかる問題を解
決するためには、長尺の円筒状の可撓性プラスチックマ
グネットを用いる必要があるが、摩擦のために該マグネ
ットへのシャフト挿入が容易でなく、また第5図に示す
如く、挿入できてもシャフト(1)がマグネット(2)
の内周壁を削り取り、発生した削り屑(3)の処理が必
要である上、挿入時の処理の引掛り、接着剤の偏在等に
因り、第6図に示す如く、シャフト(1)の挿入後のマ
グネット(2)の外周寸法がデコボコ状となり、長手方
向の寸法にバラツキを生じ、その結果、長手方向の磁気
特性のバラツキの発生が避けられず、良質の画像を得る
ことが困難である。また、極位置合わせ具の装着も容易
でない。
On the other hand, although a method in which a plurality of short cylindrical magnets are added to the shaft is also implemented, a magnetic discontinuity zone appears at the joint, and a uniform image cannot be obtained. In order to solve such a problem, it is necessary to use a long cylindrical flexible plastic magnet, but it is not easy to insert the shaft into the magnet due to friction, and as shown in FIG. Even if it can be inserted, the shaft (1) has a magnet (2)
It is necessary to scrape off the inner peripheral wall of the shavings and dispose of the generated shavings (3). In addition, due to the catching process at the time of insertion, uneven distribution of adhesive, etc., the shaft (1) is inserted as shown in FIG. The outer peripheral dimension of the subsequent magnet (2) becomes uneven and the longitudinal dimension varies, and as a result, the variation in the magnetic characteristic in the longitudinal direction cannot be avoided, and it is difficult to obtain a high-quality image. . Moreover, it is not easy to attach the pole alignment tool.

「問題点を解決するための手段」 本考案者らはかかる実情に鑑み、上記問題点を解消すべ
く鋭意研究の結果、シャフトの一端部を特定の長さで特
定の先端部面積を有する尖頭形状とすることにより、装
着が容易となり、上記の如き削り屑の発生や接着剤の偏
在による外周がデコボコとなるのを防止でき、所期の目
的が達成されることを見出し、本考案を完成した。
“Means for Solving Problems” In view of the above-mentioned circumstances, the inventors of the present invention have conducted earnest research to solve the above problems, and as a result, one end of the shaft has a specific length and a specific tip area. It was found that the head shape makes it easier to mount, and it is possible to prevent the outer periphery from becoming uneven due to the generation of shavings and uneven distribution of adhesive as described above, and it was found that the intended purpose can be achieved, and the present invention is achieved. completed.

即ち、本考案はマグネット装着部の断面が円形もしくは
多角形からなり、一端に2〜20mmの範囲で中央部面積の
60〜20%の先端部面積を有する尖頭形状部を設けたこと
を特徴とする可撓性プラスチックマグネットロール用シ
ャフトを内容とするものである。
That is, according to the present invention, the cross section of the magnet mounting portion is circular or polygonal, and the end portion of the central portion is within a range of 2 to 20 mm.
A shaft for a flexible plastic magnet roll is provided which is provided with a pointed portion having a tip area of 60 to 20%.

本考案を図面に基づいて説明すると、第1図は本考案の
実施態様を示す斜視図で、マグネット装着部の断面が四
角形のシャフト(1)の一端に尖頭形状部(4)を設け
た構成からなる。
The present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing an embodiment of the present invention, in which a magnet mounting portion is provided with a pointed portion (4) at one end of a shaft (1) having a quadrangular cross section. Consist of the composition.

第2図は本考案の他の実施態様を示す斜視図で、マグネ
ット装着部の断面が円形のシャフト(1)の一端に尖頭
形状部(4)を設けた構成からなる。
FIG. 2 is a perspective view showing another embodiment of the present invention, which comprises a shaft (1) having a circular cross section of a magnet mounting portion and a pointed portion (4) provided at one end thereof.

本考案において、尖頭形状部の先端部の面積はシャフト
中央部の断面積の約60%〜20%以下であることが望まし
い。60%を越えると、本考案の目的を効果的に達成する
ことが困難となる。また20%より小さいとマグネットロ
ール全長の寸法精度の確保が困難となる。また尖頭形状
部の長さは、余り短くなると挿入時の引掛りや、マグネ
ット内部の削り取りが発生し易くなり、また余り長くし
ても本考案の効果がそれ以上増大することもないので、
2〜20mmの範囲が適当である。
In the present invention, the area of the tip of the pointed portion is preferably about 60% to 20% or less of the cross-sectional area of the central portion of the shaft. When it exceeds 60%, it becomes difficult to effectively achieve the object of the present invention. If it is less than 20%, it becomes difficult to secure the dimensional accuracy of the entire length of the magnet roll. In addition, if the length of the pointed portion is too short, it is easy for catching at the time of insertion and scraping of the inside of the magnet to occur, and even if it is too long, the effect of the present invention does not increase further.
A range of 2 to 20 mm is suitable.

第3図は本考案の更に他の実施態様を示す斜視図で、マ
グネット装着部の断面が円形のマグネット(1)の一端
に尖頭形状部(4)が設けられ、他端にはDカット
(5)が設けられている。
FIG. 3 is a perspective view showing still another embodiment of the present invention. A magnet (1) having a circular cross section of a magnet mounting portion is provided with a pointed portion (4) at one end and a D-cut at the other end. (5) is provided.

第4図は、第3図に示したシャフト(1)を用いて、該
シャフト(1)の尖頭形状部(4)より円筒状の可撓性
プラスチックマグネット(2)に挿入装着し、該マグネ
ット(2)より突出した尖頭形状部(4)に極位置合わ
せ具(6)を装着したマグネットロールを示す。極位置
合わせ具(6)は尖頭形状部(4)に装着されるため、
装着作業を容易に行うことができる。
FIG. 4 is a perspective view of the shaft (1) shown in FIG. 3 in which the shaft (1) is inserted into the cylindrical flexible plastic magnet (2) from the pointed portion (4) of the shaft (1), 1 shows a magnet roll in which a pole aligning tool (6) is attached to a pointed portion (4) protruding from a magnet (2). Since the pole aligning tool (6) is attached to the pointed portion (4),
The mounting work can be easily performed.

本考案において、シャフトの材質は鉄、アルミニウム等
の金属;ポリカーボネート、ポリフェニレンサルファイ
ド、ポリサルフォン、ポリアミド等のエンジニアリング
プラスチック;エポキシ樹脂、フェノール樹脂等の熱硬
化性樹脂等が好適であるが、これらに限定されない。接
着剤は一液性、二液性、溶剤型、反応型等のいずれでも
使用可能であるが、シャフト挿入後に接着される必要性
から、空気中では硬化せず、空気が絶えると室温で3〜
10分で硬化する嫌気性接着剤(例えば、テトラエチレン
グリコールジメタクリレート)が好適である。
In the present invention, the material of the shaft is preferably metal such as iron or aluminum; engineering plastic such as polycarbonate, polyphenylene sulfide, polysulfone, polyamide; thermosetting resin such as epoxy resin or phenol resin, but not limited to these. . The adhesive may be one-part, two-part, solvent-type, reaction-type, etc., but it does not cure in the air because it needs to be adhered after the shaft is inserted. ~
Anaerobic adhesives that cure in 10 minutes (eg, tetraethylene glycol dimethacrylate) are suitable.

以下、実施例に基づいて、本考案を更に詳細に説明す
る。
Hereinafter, the present invention will be described in more detail based on examples.

実施例 内径5.4mm、外径13.6mm、長さ230mmの可撓性プラスチッ
クマグネット(軟質塩ビ系樹脂10重量%、ストロンチウ
ムフェライト90重量%)に、直径5.4mm、長さ265mmで、
尖頭形状部の長さ及び尖頭度〔シャフトの先端部面積/
シャフトの中央部断面積×100(%)〕を変えた鉄製シ
ャフトを挿入装着し、マグネットロール全長のバラツキ
(第4図に示したように、シャフトの先端部と極位置合
わせ具との間に削り屑が入り込み、その削り屑の量の多
少によりマグネットロール全長にバラツキが生じ
る。)、長手方向の磁気特性のバラツキ、接着強度、削
り屑除去の作業性、及び総合評価をそれぞれ評価した。
結果を第1表に示す。
Example A flexible plastic magnet (internal diameter 5.4 mm, external diameter 13.6 mm, length 230 mm (10% by weight soft vinyl chloride resin, 90% by weight strontium ferrite), diameter 5.4 mm, length 265 mm,
Length and sharpness of pointed portion [Area of shaft tip /
Insert the iron shaft with the cross-sectional area of the central part of the shaft x 100 (%) changed, and then install it, and then vary the total length of the magnet roll (as shown in Fig. 4, between the tip of the shaft and the pole alignment tool). The total length of the magnet roll varies depending on the amount of the shavings entering, depending on the amount of the shavings), the variation in the magnetic characteristics in the longitudinal direction, the adhesive strength, the workability of removing the shavings, and the overall evaluation.
The results are shown in Table 1.

尚、評価項目における◎、○、△、×は、それぞれ下記
を意味する。
In addition, ⊚, ○, Δ, and × in the evaluation items mean the following, respectively.

マグネットロール全長のバラツキ ◎:非常に小さい。Variation in total length of magnet roll ◎: Very small.

○:小さい。 ○: Small.

△:かなり大きい。 Δ: Quite large.

×:非常に大きい。 X: Very large.

長手方向の磁気特性のバラツキ ○:小さい。Variation in magnetic properties in the longitudinal direction ◯: Small.

△:かなり大きい。 Δ: Quite large.

×:非常に大きい。 X: Very large.

接着強度 ○:大きい。Adhesive strength ○: Large.

△:かなり大きい。 Δ: Quite large.

×:小さい。 X: Small.

削り屑除去の作業性 ○:良い。Workability of shaving removal ○: Good.

△:かなり手間がかかる。 Δ: It takes a lot of work.

×:非常に手間がかかる。 X: Very time-consuming.

総合評価 ◎:非常に良好である。Overall Evaluation A: Very good.

○:良好である。 ◯: Good.

△:不良である。 Δ: Bad

×:非常に不良である。 X: Very poor.

「作用・効果」 叙上の通り、本考案によれば、シャフトへの円筒状の可
撓性プラスチックマグネットの装着が容易であり、従来
の如く、マグネット内面を削り取ることが少ないから、
該削り屑の後始末も容易である。更に、接着剤の偏在も
減少するため接着強度も充分であり、またマグネットの
外周がデコボコとなることがない。従って、マグネット
の長手方向の寸法が均一であるから、磁気特性もまた均
一で、例えば電子複写機等に用いた場合に良好な画像を
得ることができる。加えて、極位置合わせ具の装着も容
易である。
[Operation / Effect] As described above, according to the present invention, it is easy to mount the cylindrical flexible plastic magnet on the shaft, and the inner surface of the magnet is hardly scraped off as in the conventional case.
It is easy to dispose of the shavings. Further, since uneven distribution of the adhesive is reduced, the adhesive strength is sufficient, and the outer circumference of the magnet does not become uneven. Therefore, since the dimension of the magnet in the longitudinal direction is uniform, the magnetic characteristics are also uniform, and a good image can be obtained when used in, for example, an electronic copying machine. In addition, it is easy to attach the pole alignment tool.

【図面の簡単な説明】 第1図乃至第3図は、それぞれ本考案シャフトの実施態
様を示す斜視図、第4図は本考案シャフトに円筒状の可
撓性プラスチックマグネットを装着し、且つ極位置合わ
せ具を装着した状態を示す斜視図、第5図及び第6図は
それぞれ従来のシャフトに円筒状の可撓性プラスチック
マグネットを装着した状態を示す断面図である。 1…シャフト 2…円筒状の可撓性プラスチックマグネット 3…削り屑 4…尖頭形状部 5…Dカット 6…極位置合わせ具
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 to FIG. 3 are perspective views showing an embodiment of a shaft of the present invention, and FIG. 4 is a shaft of the present invention in which a cylindrical flexible plastic magnet is mounted and a pole. FIG. 5 and FIG. 6 are perspective views showing a state in which an alignment tool is attached, and FIGS. 5 and 6 are sectional views showing a state in which a cylindrical flexible plastic magnet is attached to a conventional shaft. DESCRIPTION OF SYMBOLS 1 ... Shaft 2 ... Cylindrical flexible plastic magnet 3 ... Shavings 4 ... Pointed portion 5 ... D cut 6 ... Pole alignment tool

───────────────────────────────────────────────────── フロントページの続き (72)考案者 加藤 清 栃木県真岡市鬼怒ヶ丘14 栃木カネカ株式 会社内 (56)参考文献 実開 昭59−119461(JP,U) 実開 昭55−176522(JP,U) ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Kiyoshi Kato 14 Kinugaoka, Moka City, Tochigi Prefecture Tochigi Kaneka Co., Ltd. (56) References JP, U)

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 【請求項1】マグネット装着部の断面が円形もしくは多
角形からなり、一端に2〜20mmの範囲で中央部断面積の
60〜20%の先端部面積を有する尖頭形状部を設けたこと
を特徴とする可撓性プラスチックマグネットロール用シ
ャフト。
1. A cross section of a magnet mounting portion is circular or polygonal, and has a central cross sectional area of 2 to 20 mm at one end.
A shaft for a flexible plastic magnet roll, which is provided with a pointed portion having a tip area of 60 to 20%.
JP1988006079U 1988-01-21 1988-01-21 Shaft for magnet roll Expired - Lifetime JPH0751765Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1988006079U JPH0751765Y2 (en) 1988-01-21 1988-01-21 Shaft for magnet roll

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1988006079U JPH0751765Y2 (en) 1988-01-21 1988-01-21 Shaft for magnet roll

Publications (2)

Publication Number Publication Date
JPH01112006U JPH01112006U (en) 1989-07-27
JPH0751765Y2 true JPH0751765Y2 (en) 1995-11-22

Family

ID=31210008

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1988006079U Expired - Lifetime JPH0751765Y2 (en) 1988-01-21 1988-01-21 Shaft for magnet roll

Country Status (1)

Country Link
JP (1) JPH0751765Y2 (en)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55176522U (en) * 1979-06-06 1980-12-18
JPS59119461U (en) * 1983-01-31 1984-08-11 ティーディーケイ株式会社 magnetic roll

Also Published As

Publication number Publication date
JPH01112006U (en) 1989-07-27

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