JP3316795B2 - Coaxial cylindrical torque limiter - Google Patents
Coaxial cylindrical torque limiterInfo
- Publication number
- JP3316795B2 JP3316795B2 JP11548197A JP11548197A JP3316795B2 JP 3316795 B2 JP3316795 B2 JP 3316795B2 JP 11548197 A JP11548197 A JP 11548197A JP 11548197 A JP11548197 A JP 11548197A JP 3316795 B2 JP3316795 B2 JP 3316795B2
- Authority
- JP
- Japan
- Prior art keywords
- permanent magnet
- rotating shaft
- peripheral surface
- torque limiter
- diameter portion
- 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
Links
Landscapes
- Dynamo-Electric Clutches, Dynamo-Electric Brakes (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、同軸円筒型トルク
リミッタに関し、さらに詳しくは、永久磁石の接着剤層
からはみ出た余剰の接着剤が接着面外に付着することに
よる不都合を防止できる同軸円筒型トルクリミッタに関
する。TECHNICAL FIELD The present invention relates to a coaxial cylindrical torque <br/> limiter, more particularly, due to the excess of the adhesive protruding from the adhesive layer of the permanent magnet is attached to the outside of the adhesive surface Seki to <br/> coaxial cylindrical torque limit data that can prevent a disadvantage.
【０００２】[0002]
【従来の技術】図７は、従来の同軸円筒型トルクリミッ
タ５００を用いた給紙装置の重送防止用リバースローラ
の一例を示す端面図である。この同軸円筒型トルクリミ
ッタ５００において、金属製シャフトＳの周りには、回
転軸５１が嵌合されている。この回転軸５１は、外周面
からフランジ５１ｆが突出した円筒形状であり、ポリア
セタール樹脂（ＰＯＭ）製である。前記回転軸５１の外
周面には、円筒状の永久磁石５２が接着剤層５３を介し
て接着される。この永久磁石５２は、フェライト磁石で
ある。2. Description of the Related Art FIG. 7 is an end view showing an example of a reverse roller for preventing double feed of a paper feeder using a conventional coaxial cylindrical torque limiter 500. In the coaxial cylindrical torque limiter 500, the rotating shaft 51 is fitted around the metal shaft S. The rotating shaft 51 has a cylindrical shape with a flange 51f protruding from the outer peripheral surface, and is made of polyacetal resin (POM). A cylindrical permanent magnet 52 is bonded to the outer peripheral surface of the rotating shaft 51 via an adhesive layer 53. This permanent magnet 52 is a ferrite magnet.
【０００３】回転筒２４は、ポリエチレン樹脂，ポリプ
ロピレン樹脂，ポリブテン樹脂等のポリオレフィン樹脂
製である。前記回転筒２４の内周面には、円筒状の半硬
質磁性体２５が圧入にて固着される。前記半硬質磁性体
２５は、Ｆｅ−Ｃｒ−Ｃｏ系合金製である。The rotary cylinder 24 is made of a polyolefin resin such as a polyethylene resin, a polypropylene resin, and a polybutene resin. A cylindrical semi-hard magnetic body 25 is fixed to the inner peripheral surface of the rotary cylinder 24 by press-fitting. The semi-hard magnetic body 25 is made of an Fe-Cr-Co alloy.
【０００４】前記回転軸５１と前記回転筒２４は、前記
永久磁石５２と前記半硬質磁性体２５とがギャップＡを
あけて対向し且つ相対的に回転しうるように、同軸上に
配置されている。前記回転筒２４には、蓋体２４ａが取
り付けられると共にゴムローラＧが嵌合されている。図
中、Ｍは、前記回転軸５１と前記蓋体２４ａとが摺動す
る摺動部である。The rotating shaft 51 and the rotating cylinder 24 are arranged coaxially so that the permanent magnet 52 and the semi-hard magnetic body 25 can face each other with a gap A therebetween and rotate relatively. I have. A lid 24a is attached to the rotary cylinder 24, and a rubber roller G is fitted thereto. In the drawing, M is a sliding portion on which the rotating shaft 51 and the lid 24a slide.
【０００５】前記金属製シャフトＳおよび前記回転軸５
１が回転し、前記永久磁石５２が回転すると、前記永久
磁石５２と前記半硬質磁性体２５の間にヒステリシスト
ルクが働き、前記回転筒２４が回転し、前記ゴムローラ
Ｇが回転する。そして、前記ヒステリシストルクに見合
った力で重送用紙の分離が行われる。The metal shaft S and the rotating shaft 5
When 1 rotates and the permanent magnet 52 rotates, a hysteresis torque acts between the permanent magnet 52 and the semi-hard magnetic body 25, the rotary cylinder 24 rotates, and the rubber roller G rotates. Then, the multi-feed paper is separated by a force corresponding to the hysteresis torque.
【０００６】次に、前記永久磁石５２を接着する手順に
ついて説明する。図８の（ａ）（ｂ）（ｃ）に示すよう
に、回転軸５１の外周面に接着剤５３ａを塗布し、その
上に永久磁石５２を嵌め被せ、永久磁石５２の下端がフ
ランジ５１ｆに当接するまで押し下げる。接着剤５３ａ
が硬化すると、永久磁石５２が接着剤層５３を介して回
転軸５１に固着される。ところで、図８の（ｂ）に示す
ように、永久磁石５２の押し下げに伴って、接着剤層５
３から余剰の接着剤５３ｅがはみ出す。これにより、図
８の（ｃ）に示すように、フランジ５１ｆから接着剤５
３ｅが漏出するが、これを手作業により拭き取っておく
必要がある。その理由は、接着剤５３ｅが摺動部Ｍに付
着すると、回転軸５１と蓋体２４ａとの摺動性が悪化し
てトルク値の変動や回転むらを生じるためである。ま
た、接着剤５３ｅが摺動部Ｍに付着しないまでも、接着
面外で接着剤５３ｅに埃や異物が付着して、摺動部Ｍ以
外で回転軸５１が蓋体２４ａなどと接触し、やはりトル
ク値の変動や回転むらを生じるためである。Next, a procedure for bonding the permanent magnet 52 will be described. As shown in FIGS. 8A, 8B , and 8C, an adhesive 53a is applied to the outer peripheral surface of the rotating shaft 51, a permanent magnet 52 is fitted thereon, and the lower end of the permanent magnet 52 is attached to the flange 51f. Press down until it touches. Adhesive 53a
Is cured, the permanent magnet 52 is fixed to the rotating shaft 51 via the adhesive layer 53. By the way, as shown in FIG. 8B , as the permanent magnet 52 is pushed down, the adhesive layer 5
The excess adhesive 53e protrudes from 3. This allows
As shown in FIG. 8 (c), the adhesive 5
3e leaks out and needs to be wiped off by hand. The reason is that, when the adhesive 53e adheres to the sliding portion M, the sliding property between the rotating shaft 51 and the lid 24a is deteriorated, causing a variation in torque value and uneven rotation. Further, even if the adhesive 53e does not adhere to the sliding portion M, dust or foreign matter adheres to the adhesive 53e outside the bonding surface, and the rotary shaft 51 contacts the lid 24a or the like other than the sliding portion M, This is also because torque values fluctuate and rotation unevenness occurs.
【０００７】[0007]
【発明が解決しようとする課題】上記従来の同軸円筒型
トルクリミッタ５００では、フランジ５１ｆから漏出し
た接着剤５３ｅを手作業でいちいち拭き取らなければな
らず、手間がかかり、生産性が悪い問題点がある。な
お、接着剤５３ａの塗布量を減らせば漏出を軽減できる
が、接着力が不足して、使用中に永久磁石５２が回転軸
５１から抜け落ちたり，回転軸５１が永久磁石５２とス
リップして空回りしやすくなり、トルクリミッタとして
の信頼性が得られないという問題点がある。また、フラ
ンジ５１ｆの厚みを大きくして、漏出した接着剤５３ｅ
が摺動部Ｍまで達しないようにすることも考えられる
が、フランジの厚み分だけ永久磁石５２の接着許容面積
が狭まるから、永久磁石５２のサイズの上限が相対的に
小さくなり、トルクリミッタの小型化，高トルク化の見
地から不利となる。すなわち、永久磁石５２のサイズが
不変ならばトルクリミッタ全体のサイズが増大し、トル
クリミッタ全体のサイズが不変ならば永久磁石５２のサ
イズが小さくなってしまう。そこで、本発明の目的は、
永久磁石の接着剤層からはみ出た余剰の接着剤が接着面
外に付着することによる不都合を防止できる同軸円筒型
トルクリミッタを提供することにある。In the above conventional coaxial cylindrical torque limiter 500, the adhesive 53e leaked from the flange 51f must be manually wiped off one by one, which is troublesome and results in poor productivity. There is. The leakage can be reduced by reducing the application amount of the adhesive 53a, but the adhesive force is insufficient, and the permanent magnet 52 falls off from the rotating shaft 51 during use, or the rotating shaft 51 slips with the permanent magnet 52 and idles. And the reliability as a torque limiter cannot be obtained. In addition, the thickness of the flange 51f is increased so that the leaked adhesive 53e
May not reach the sliding portion M, however, since the allowable bonding area of the permanent magnet 52 is reduced by the thickness of the flange, the upper limit of the size of the permanent magnet 52 becomes relatively small, and the torque limiter This is disadvantageous in terms of downsizing and high torque. That is, if the size of the permanent magnet 52 does not change, the size of the entire torque limiter increases, and if the size of the entire torque limiter does not change, the size of the permanent magnet 52 decreases. Therefore, an object of the present invention is to
It is an object of the present invention to provide a coaxial cylindrical torque limiter capable of preventing inconvenience caused by excess adhesive which has protruded from an adhesive layer of a permanent magnet adhering to an outside of an adhesive surface.
【０００８】[0008]
【課題を解決するための手段】第１の観点では、本発明
は、回転軸（１）の外周面に円筒状の永久磁石（２）を
接着し、回転筒（４）の内周面に円筒状の半硬質磁性体
（５）を固着し、ギャップをあけて前記永久磁石（２）
と前記半硬質磁性体（５）を対向させ且つ相対的に回転
しうるように前記回転軸（１）と前記回転筒（４）とを
同軸上に配置し、前記永久磁石（２）と前記半硬質磁性
体（５）との間に生じるヒステリシストルクにより前記
回転軸（１）と前記回転筒（４）の間で回転を伝達する
同軸円筒型トルクリミッタ（１０）であって、前記回転
軸（１）が、摺動部（Ｍ）を兼ねる大径部（１ａ）と，
前記永久磁石（２）の接着面を形成される小径部（１
ｃ） と，前記大径部（１ａ）と前記小径部（１ｃ）との
中間に形成され且つ両者との間に段差を付ける中径部
（１ｂ）とからなり、前記小径部（１ｃ）からの前記中
径部（１ｂ）の突出面（Ｒ）に前記永久磁石（２）の一
端面を当接させて当該永久磁石（２）を接着し、前記永
久磁石（２）の一端面と，前記中径部（１ｂ）からの前
記大径部（１ａ）の突出面との間に余剰の接着剤（３
ｅ）を溜める隙間を形成したことを特徴とする同軸円筒
型トルクリミッタ（１０）を提供する。上記第１の観点
による同軸円筒型トルクリミッタ（１０）では、永久磁
石の接着剤層からはみ出た余剰の接着剤（３ｅ）を、永
久磁石（２）の一端面と，大径部（１ａ）の突出面との
間に形成される間隙に溜めるので、接着剤が摺動部に漏
出することによる不都合を防止でき、次の作用を奏す
る。 （１）永久磁石の接着に十分な分量の接着剤を塗布した
場合でも、余剰の接着剤を拭き取る必要がなくなり、生
産性を向上できる。 （２）余剰の接着剤が摺動部などに付着しないから、摺
動性が悪化してトルク値の変動や回転むらを生じること
を防止できる。 （３）永久磁石を強固に接着できるから、トルクリミッ
タとしての信頼性を向上できる。 （４）回転軸の外周面に突出させたフランジを設けなく
ても、接着剤の漏出による悪影響を防げる。従って、永
久磁石のサイズを相対的に小さくする必要がないか、あ
るいは相対的に大きくすることが可能であり、トルクリ
ミッタの小型化，高トルク化の見地から有利である。According to a first aspect of the present invention , a cylindrical permanent magnet (2) is provided on the outer peripheral surface of a rotating shaft (1).
Adhered, cylindrical semi-hard magnetic material on the inner peripheral surface of rotating cylinder (4)
(5) The permanent magnet (2) is fixed and a gap is provided.
And the semi-hard magnetic body (5) are opposed and rotated relatively.
The rotating shaft (1) and the rotating cylinder (4) are
Coaxially arranged, the permanent magnet (2) and the semi-hard magnetic
The hysteresis torque generated between the body (5) and the body (5)
Rotation is transmitted between the rotating shaft (1) and the rotating cylinder (4).
A coaxial cylindrical torque limiter (10),
The shaft (1) has a large-diameter portion (1a) also serving as a sliding portion (M),
The small-diameter portion (1) on which the bonding surface of the permanent magnet (2) is formed
c) and the large diameter portion (1a) and the small diameter portion (1c).
Medium diameter part formed in the middle and providing a step between them
(1b), and the middle portion from the small diameter portion (1c).
One of the permanent magnets (2) is provided on the protruding surface (R) of the diameter portion (1b).
The permanent magnet (2) is adhered by bringing the end faces into contact with each other,
One end face of the magnet (2) and the front from the middle diameter part (1b)
The excess adhesive (3) is provided between the large diameter portion (1a) and the protruding surface.
e) a coaxial cylinder formed with a gap for storing
A mold torque limiter (10) is provided. In the coaxial cylindrical torque limiter (10) according to the first aspect, the permanent magnetic
Remove excess adhesive (3e) protruding from the stone adhesive layer
Between one end surface of the permanent magnet (2) and the protruding surface of the large diameter portion (1a).
The adhesive collects in the gap formed between them, so that the adhesive leaks to the sliding part.
Can prevent a disadvantage due to out, the following advantageous effects. (1) Even when a sufficient amount of adhesive is applied to bond the permanent magnet, there is no need to wipe off excess adhesive, and productivity can be improved. (2) Since the surplus adhesive does not adhere to the sliding portion, it is possible to prevent the slidability from deteriorating and causing a change in torque value and uneven rotation. (3) Since the permanent magnet can be firmly bonded, the reliability as a torque limiter can be improved. (4) Even if a protruding flange is not provided on the outer peripheral surface of the rotating shaft, adverse effects due to leakage of the adhesive can be prevented. Therefore, it is not necessary to make the size of the permanent magnet relatively small or it is possible to make it relatively large, which is advantageous from the viewpoint of reducing the size and increasing the torque of the torque limiter.
【０００９】第２の観点では、本発明は、上記構成の同
軸円筒型トルクリミッタ（１０）において、無着磁の前
記永久磁石（２）を前記回転軸（１）の外周面に接着し
た後、その永久磁石（２）の外周面を多極着磁すること
を特徴とする同軸円筒型トルクリミッタ（１０）を提供
する。着磁した永久磁石を回転軸（１）の外周面に接着
した場合、接着剤の硬化を待っている永久磁石が、他の
永久磁石と相互に吸着し合ったり、周囲の磁性粉を吸着
したりすることがある。これを防止するには、広い場所
を要したり、管理の負担が重くなる問題点がある。 これ
に対して、上記第２の観点による同軸円筒型トルクリミ
ッタでは、無着磁の永久磁石（２）を回転軸（１）の外
周面に接着した後、多極着磁するので、上記問題点が解
消される。 In a second aspect, the present invention provides the same configuration as the above.
Before non-magnetization in the shaft-cylindrical torque limiter (10)
The permanent magnet (2) is bonded to the outer peripheral surface of the rotating shaft (1).
After that, the outer peripheral surface of the permanent magnet (2) is multipolar magnetized.
A coaxial cylindrical torque limiter (10) is provided. Adhesion of magnetized permanent magnet to outer circumference of rotating shaft (1)
If the permanent magnet is waiting for the adhesive to cure,
Adsorb each other with permanent magnets or adsorb surrounding magnetic powder
Or you may. To prevent this, a large place
And the burden of management becomes heavy. this
A coaxial cylindrical torque limiter according to the second aspect
The non-magnetized permanent magnet (2)
After bonding to the peripheral surface, multipolar magnetization is applied, so the above problem is solved.
Be erased.
【００１０】第３の観点では、本発明は、上記構成の同
軸円筒型トルクリミッタにおいて、前記回転軸（１）が
合成樹脂製であり、該合成樹脂製の回転軸（１）の外周
面をプライマー処理してから接着剤を塗布し、無着磁の
前記永久磁石を前記回転軸（１）の外周面に接着した
後、その永久磁石（２）の外周面を多極着磁することを
特徴とする同軸円筒型トルクリミッタを提供する。上記
第３の観点による同軸円筒型トルクリミッタでは、合成
樹脂製の回転軸（１）を用いるため、優れた摺動性が得
られる。また、プライマー処理された回転軸の外周面と
接着剤層との間に化学結合が形成されているため、接着
力が得にくい合成樹脂製の回転軸（１）の外周面に永久
磁石（２）を強固に接着することができ、永久磁石
（２）の剥離が防止され、トルクリミッタとしての信頼
性が向上する。 In a third aspect, the present invention provides the same configuration as the above.
In the shaft-cylindrical torque limiter, the rotation shaft (1) is
It is made of synthetic resin, and the outer periphery of the synthetic resin rotary shaft (1)
After applying primer to the surface, apply an adhesive
The permanent magnet was adhered to the outer peripheral surface of the rotating shaft (1)
Then, the outer peripheral surface of the permanent magnet (2) should be multipolar magnetized.
A coaxial cylindrical torque limiter is provided. The coaxial cylindrical torque limiter according to the third aspect, the synthetic
Excellent slidability is obtained because the resin rotary shaft (1) is used.
Can be In addition, the outer peripheral surface of
Adhesion due to the formation of a chemical bond with the adhesive layer
Permanent on the outer circumference of the rotating shaft (1) made of synthetic resin, which is difficult to obtain force
The magnet (2) can be firmly bonded, and the permanent magnet
(2) Peeling is prevented and reliability as a torque limiter
The performance is improved.
【００１１】第４の観点では、本発明は、回転軸（１）
の外周面に円筒状の永久磁石（２）を接着し、回転筒
（４）の内周面に円筒状の半硬質磁性体（５）を固着
し、ギャップをあけて前記永久磁石（２）と前記半硬質
磁性体（５）を対向させ且つ相対的に回転しうるように
前記回転軸（１）と前記回転筒（４）とを同軸上に配置
し、前記永久磁石（２）と前記半硬質磁性体（５）との
間に生じるヒステリシストルクにより前記回転軸（１）
と前記回転筒（４）の間で回転を伝達する同軸円筒型ト
ルクリミッタであって、前記回転軸（１）が、摺動部
（Ｍ）を兼ねる大径部（１ａ）と，前記永久磁石（２）
の接着面を形成される小径部（１ｃ）と，前記大径部
（１ａ）と前記小径部（１ｃ）との中間に形成され且つ
両者との間に段差を付ける中径部（１ｂ）とからなり、
前記中径部（１ｂ）からの前記大径部（１ａ）の突出面
に前記中径部（１ｂ）に続く円周方向の溝（１Ｕ）を刻
設し、前記小径部（１ｃ）からの前記中径部（１ｂ）の
突出面（Ｒ）に前記永久磁石（２）の一端面を当接させ
て当該永久磁石（２）を接着し、前記溝（１Ｕ）内に余
剰の接着剤（３ｅ）を溜めることを特徴とする同軸円筒
型トルクリミッタを提供する。上記第４の観点による同
軸円筒型トルクリミッタでは、永久磁石の接着剤層から
はみ出た余剰の接着剤（３ｅ）を、大径部の突出面に刻
設された溝（１Ｕ）内に溜めるので、接着剤が摺動部に
漏出することが防止される。また、溝（１Ｕ）内の溜め
容量は十分に大きいので、漏出防止性能が高い。In a fourth aspect, the present invention provides a rotary shaft (1)
A cylindrical permanent magnet (2) is adhered to the outer peripheral surface of the cylindrical member, and a cylindrical semi-hard magnetic body (5) is fixed to the inner peripheral surface of the rotary cylinder (4 ). The rotating shaft (1) and the rotating cylinder (4) are arranged coaxially so that the permanent magnet (2) and the semi-hard magnetic body (5) can face each other and rotate relatively. Due to the hysteresis torque generated between the rotating shaft (1) and the semi-hard magnetic body (5) ,
A rotary shaft (1) for transmitting rotation between the rotary shaft (4) and the rotary cylinder (4) , wherein the rotary shaft (1) has a large-diameter portion (1a) also serving as a sliding portion (M); (2)
A small-diameter portion (1c) on which an adhesive surface is formed;
(1a) and a middle diameter part (1b) formed between the small diameter part (1c) and providing a step between them.
A circumferential groove (1 U ) following the middle diameter portion (1b ) is engraved on a protruding surface of the large diameter portion (1a ) from the middle diameter portion (1b), and a groove is formed from the small diameter portion (1c). The permanent magnet (2) is adhered by bringing one end surface of the permanent magnet (2) into contact with the protruding surface (R ) of the middle diameter portion (1b ) , and the excess adhesive is left in the groove (1U) . A coaxial cylindrical torque limiter characterized by storing (3e). In the coaxial cylindrical torque limiter according to the fourth aspect, the excess adhesive (3e) protruding from the adhesive layer of the permanent magnet is stored in the groove (1U) formed on the protruding surface of the large diameter portion. Further, the adhesive is prevented from leaking to the sliding portion. Further, since the capacity of the reservoir in the groove (1U) is sufficiently large, the leakage prevention performance is high.
【００１２】第５の観点では、回転軸（１）の外周面に
円筒状の永久磁石（２）を接着し、回転筒（４）の内周
面に円筒状の半硬質磁性体（５）を固着し、ギャップを
あけて前記永久磁石（２）と前記半硬質磁性体（５）を
対向させ且つ相対的に回転しうるように前記回転軸
（１）と前記回転筒（４）とを同軸上に配置し、前記永
久磁石（２）と前記半硬質磁性体（５）との間に生じる
ヒステリシストルクにより前記回転軸（１）と前記回転
筒（４）の間で回転を伝達する同軸円筒型トルクリミッ
タであって、前記回転軸（１）の外周面から中径部と大
径部とを含む段差付きフランジ（１Ｆ）が突出し、その
段差付きフランジ（１Ｆ）の中径部側端面（Ｔ）に前記
永久磁石（２）の一端面を当接させて当該永久磁石
（２）を接着し、前記永久磁石（２）の一端面と，前記
段差付きフランジ（１Ｆ）の前記中径部からの前記大径
部の突出面との間に余剰の接着剤（３ｅ）を溜める隙間
を形成したことを特徴とする同軸円筒型トルクリミッタ
を提供する。上記第５の観点による同軸円筒型トルクリ
ミッタでは、永久磁石の接着剤層からはみ出た余剰の接
着剤（３ｅ）を、永久磁石の一端面と，段差付きフラン
ジ（１Ｆ）の段差を隔てた突出面との間に形成される間
隙に溜めるので、接着剤が摺動部に漏出することが防止
される。According to a fifth aspect, a cylindrical permanent magnet (2) is adhered to the outer peripheral surface of the rotating shaft (1), and a cylindrical semi-hard magnetic body (5) is attached to the inner peripheral surface of the rotating cylinder (4). The permanent magnet (2) and the semi-hard magnetic body (5) are opposed to each other with a gap therebetween, and the rotating shaft is rotated so as to be relatively rotatable.
(1) and the rotating cylinder (4) are arranged coaxially, and the rotating shaft (1) and the rotating shaft are rotated by a hysteresis torque generated between the permanent magnet (2) and the semi-hard magnetic body (5). A coaxial cylindrical torque limiter for transmitting rotation between cylinders (4) , wherein a stepped flange (1F) including a middle diameter portion and a large diameter portion protrudes from an outer peripheral surface of the rotating shaft (1) , One end face of the permanent magnet (2) is brought into contact with the middle diameter side end face (T) of the stepped flange (1F) and the permanent magnet
(2) , and an excess adhesive (3e) is provided between one end surface of the permanent magnet (2) and the projecting surface of the large diameter portion from the middle diameter portion of the stepped flange (1F ). The present invention provides a coaxial cylindrical torque limiter characterized by forming a gap for storing the torque. In the coaxial cylindrical torque limiter according to the fifth aspect, the excess adhesive (3e) protruding from the adhesive layer of the permanent magnet is protruded from one end surface of the permanent magnet and the step of the stepped flange (1F). Since the adhesive is accumulated in the gap formed between the surface and the surface, the adhesive is prevented from leaking to the sliding portion.
【００１３】第６の観点では、本発明は、上記構成の同
軸円筒型トルクリミッタにおいて、無着磁の前記永久磁
石（２）を前記回転軸（１）の外周面に接着した後、そ
の永久磁石（２）の外周面を多極着磁することを特徴と
する同軸円筒型トルクリミッタを提供する。着磁した永
久磁石を回転軸（１）の外周面に接着した場合、接着剤
の硬化を待 っている永久磁石が、他の永久磁石と相互に
吸着し合ったり、周囲の磁性粉を吸着したりすることが
ある。これを防止するには、広い場所を要したり、管理
の負担が重くなる問題点がある。これに対して、上記第
６の観点による同軸円筒型トルクリミッタでは、無着磁
の永久磁石（２）を回転軸（１）の外周面に接着した
後、多極着磁するので、上記問題点が解消される。 According to a sixth aspect, the present invention provides the above-described configuration.
In the shaft-cylindrical torque limiter, the non-magnetized permanent magnet
After bonding the stone (2) to the outer peripheral surface of the rotating shaft (1),
Characterized in that the outer peripheral surface of the permanent magnet (2) is multipolar magnetized.
To provide a coaxial cylindrical torque limiter . Magnetized eternity
When the permanent magnet is attached to the outer peripheral surface of the rotating shaft (1), the adhesive
Permanent magnet and the hardening of Tsu wait is, each other and the other permanent magnet
Adsorb each other or adsorb surrounding magnetic powder.
is there. To prevent this, you need to take up a lot of space or manage
There is a problem that the burden on the user becomes heavy. In contrast,
In the coaxial cylindrical torque limiter according to the sixth aspect,
Of the permanent magnet (2) is adhered to the outer peripheral surface of the rotating shaft (1).
Later, since the multipolar magnetization occurs, the above problem is solved.
【００１４】第７の観点では、本発明は、回転筒（４）
の内周面に円筒状の永久磁石（２）を接着し、回転軸
（１）の外周面に円筒状の半硬質磁性体（５）を固着
し、ギャップをあけて前記永久磁石（２）と前記半硬質
磁性体（５）を対向させ且つ相対的に回転しうるように
前記回転筒（４）と前記回転軸（１）とを同軸上に配置
し、前記永久磁石（２）と前記半硬質磁性体（５）との
間に生じるヒステリシストルクにより前記回転筒（４）
と前記回転軸（１）の間で回転を伝達する同軸円筒型ト
ルクリミッタ（９０）であって、前記回転筒（４）の肉
厚を変えて内周面に段差を形成し、前記段差の上側面に
前記永久磁石（２）の一端面を当接させて当該永久磁石
（２）を接着し、前記永久磁石（２）の一端面と，前記
段差の下側面との間に余剰の接着剤（３ｅ）を溜める隙
間を形成したことを特徴とする同軸円筒型トルクリミッ
タ（９０）を提供する。上記第７の観点による同軸円筒
型トルクリミッタでは、回転筒に永久磁石を接着するタ
イプの場合でも、永久磁石の接着剤層からはみ出た余剰
の接着剤を、永久磁石の一端面と，回転筒との間に形成
される間隙に溜めて、接着剤が永久磁石と半硬質磁性体
とのギャップや，回転軸と回転筒との摺動部に漏出する
ことを防止できる。 According to a seventh aspect, the present invention provides a rotary cylinder (4)
A cylindrical permanent magnet (2) is adhered to the inner peripheral surface of the
A cylindrical semi-hard magnetic material (5) is fixed to the outer peripheral surface of (1).
And the permanent magnet (2) and the semi-rigid
So that the magnetic body (5) can face and rotate relatively
The rotating cylinder (4) and the rotating shaft (1) are arranged coaxially.
And the permanent magnet (2) and the semi-hard magnetic body (5)
The rotating cylinder (4) due to hysteresis torque generated between
Coaxial cylindrical torsion transmitting the rotation between the shaft and the rotating shaft (1)
A lulimiter (90), wherein the meat of the rotary cylinder (4) is provided.
By changing the thickness, a step is formed on the inner peripheral surface, and on the upper surface of the step
One end surface of the permanent magnet (2) is brought into contact with the permanent magnet (2).
(2) is adhered, and one end surface of the permanent magnet (2) is
A gap for storing excess adhesive (3e) between the lower surface of the step and the lower surface
Coaxial cylindrical torque limit characterized by forming a gap
(90) . In the coaxial cylinder type torque limiter according to the seventh aspect , a permanent magnet is bonded to the rotary cylinder.
In the case of Ip, surplus that protrudes from the adhesive layer of the permanent magnet
Adhesive is formed between one end of the permanent magnet and the rotating cylinder
In the gap, the adhesive is permanent magnet and semi-hard magnetic material
Leaks into the gap between the shaft and the sliding part between the rotating shaft and the rotating cylinder
Can be prevented.
【００１５】[0015]
【発明の実施の形態】以下、図に示す実施の形態により
本発明をさらに詳細に説明する。なお、これにより本発
明が限定されるものではない。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail with reference to the embodiments shown in the drawings. Note that the present invention is not limited by this.
【００１６】−第１の実施形態− 図１は、本発明の第１の実施形態にかかる同軸円筒型ト
ルクリミッタ１０を用いた給紙装置の重送防止用リバー
スローラを示す端面図である。この同軸円筒型トルクリ
ミッタ１０において、金属製シャフトＳの周りには、回
転軸１が嵌合されている。この回転軸１は、摺動部Ｍを
兼ねる大径部（図２の１ａ）と，後述の永久磁石２の接
着面を形成される小径部（図２の１ｃ）と、前記大径部
と前記小径部との中間に形成され且つ両者の間に段差を
付ける中径部（図２の１ｂ）とからなり、アルミニウム
合金や，亜鉛合金や，ステンレス鋼や，鉛合金や，銅合
金などの金属材料製である。なお、金属材料の他にポリ
アセタール樹脂も使用される。さらに、ポリエチレン樹
脂，ポリプロピレン樹脂，ポリブテン樹脂等のポリオレ
フィン樹脂も使用される。First Embodiment FIG. 1 is an end view showing a double feed prevention reverse roller of a paper feeder using a coaxial cylindrical torque limiter 10 according to a first embodiment of the present invention. In the coaxial cylindrical torque limiter 10, the rotating shaft 1 is fitted around the metal shaft S. The rotating shaft 1 has a large-diameter portion (1a in FIG. 2) also serving as a sliding portion M, a small-diameter portion (1c in FIG. 2) on which a bonding surface of a permanent magnet 2 described later is formed, and the large-diameter portion. A middle diameter portion (1b in FIG. 2) formed in the middle of the small diameter portion and providing a step between them is made of aluminum alloy, zinc alloy, stainless steel, lead alloy, copper alloy, or the like. Made of metal material. In addition, a polyacetal resin is also used in addition to the metal material. Further, polyolefin resins such as polyethylene resin, polypropylene resin and polybutene resin are also used.
【００１７】前記回転軸１の外周面には、円筒状の永久
磁石２が接着剤層３を介して接着される。前記永久磁石
２の一端面と，前記回転軸１との隙間には、接着剤層３
からはみ出た余剰の接着剤３ｅが溜められる（図２を参
照して後で詳しく説明する）。前記永久磁石２は、Ｎｄ
−Ｆｅ−Ｂ系磁石や，Ｓｍ−Ｆｅ−Ｎ系磁石や，Ｓｍ−
Ｃｏ系磁石などの希土類磁石である。なお、希土類磁石
の他に、フェライト磁石も使用される。希土類磁石は、
トルクリミッタの小型化や，高トルク化の見地から有利
である。また、前記希土類磁石やフェライト磁石は、焼
結磁石や樹脂磁石であってもよい。A cylindrical permanent magnet 2 is adhered to the outer peripheral surface of the rotating shaft 1 via an adhesive layer 3. The gap between one end surface of the permanent magnet 2 and the rotating shaft 1 has an adhesive layer 3
The excess adhesive 3e that has run off is stored (described later in detail with reference to FIG. 2). The permanent magnet 2 is Nd
-Fe-B magnet, Sm-Fe-N magnet, Sm-
Rare earth magnets such as Co-based magnets. In addition to the rare earth magnet, a ferrite magnet is also used. Rare earth magnets
This is advantageous from the viewpoint of reducing the size of the torque limiter and increasing the torque. Further, the rare earth magnet or the ferrite magnet may be a sintered magnet or a resin magnet.
【００１８】回転筒４は、ポリエチレン樹脂，ポリプロ
ピレン樹脂，ポリブテン樹脂等のポリオレフィン樹脂や
ポリアセタール樹脂などの合成樹脂材料製である。The rotary cylinder 4 is made of a synthetic resin material such as a polyolefin resin such as a polyethylene resin, a polypropylene resin, and a polybutene resin, and a polyacetal resin.
【００１９】前記回転筒４の内周面には、円筒状の半硬
質磁性体５が圧入にて固着される。前記半硬質磁性体５
は、Ｆｅ−Ｃｒ−Ｃｏ系合金製である。なお、Ｆｅ−Ｃ
ｒ−Ｃｏ系合金の他に、Ｆｅ−Ｃｏ系合金も使用され
る。A cylindrical semi-hard magnetic body 5 is fixed to the inner peripheral surface of the rotary cylinder 4 by press-fitting. The semi-hard magnetic material 5
Is made of an Fe-Cr-Co alloy. In addition, Fe-C
In addition to the r-Co alloy, an Fe-Co alloy is also used.
【００２０】回転軸１は、回転筒４の中に挿入され、回
転軸１の端面が回転筒４の底面に当接することで、回転
軸１と回転筒４との軸方向の相対的な位置決めがなされ
る。そして、前記回転軸１と前記回転筒４は、前記永久
磁石２と前記半硬質磁性体５とがギャップＡをあけて対
向し且つ相対的に回転しうるように、同軸上に配置され
ている。The rotary shaft 1 is inserted into the rotary cylinder 4, and the end face of the rotary shaft 1 abuts against the bottom surface of the rotary cylinder 4, whereby the rotary shaft 1 and the rotary cylinder 4 are relatively positioned in the axial direction. Is made. The rotating shaft 1 and the rotating cylinder 4 are arranged coaxially so that the permanent magnet 2 and the semi-hard magnetic body 5 can face each other with a gap A therebetween and rotate relatively. .
【００２１】前記回転筒４には、蓋体４ａが取り付けら
れると共にゴムローラＧが嵌合されている。A cover 4a is attached to the rotary cylinder 4, and a rubber roller G is fitted thereto.
【００２２】なお、回転軸１の端面が回転筒４の底面に
当接したとき、永久磁石２の面長の中心は半硬質磁性体
５の面長の中心よりも蓋体４ａ側に若干ずれた状態とな
るように予め設計してある。このため、永久磁石２と半
硬質磁性体５との間には前記ずれを補正する方向に移動
しようとする力が磁気的に作用するから、回転軸１の端
面が回転筒４の底面に当接した状態は維持され、回転軸
１と回転筒４との軸方向における相対的な位置関係は安
定している。When the end surface of the rotating shaft 1 comes into contact with the bottom surface of the rotary cylinder 4, the center of the surface length of the permanent magnet 2 is slightly shifted from the center of the surface length of the semi-hard magnetic body 5 toward the lid 4a. It is designed in advance so as to be in a state of being closed. For this reason, a force for moving the permanent magnet 2 and the semi-hard magnetic body 5 in a direction for correcting the displacement magnetically acts, so that the end face of the rotating shaft 1 contacts the bottom surface of the rotating cylinder 4. The contact state is maintained, and the relative positional relationship between the rotating shaft 1 and the rotating cylinder 4 in the axial direction is stable.
【００２３】前記金属製シャフトＳおよび前記回転軸１
が回転し、前記永久磁石２が回転すると、前記永久磁石
２と前記半硬質磁性体５の間にヒステリシストルクが働
き、前記回転筒４が回転し、前記ゴムローラＧが回転す
る。そして、前記ヒステリシストルクに見合った力で重
送用紙の分離が行われる。The metal shaft S and the rotating shaft 1
When the permanent magnet 2 rotates, a hysteresis torque acts between the permanent magnet 2 and the semi-hard magnetic body 5 to rotate the rotary cylinder 4 and rotate the rubber roller G. Then, the multi-feed paper is separated by a force corresponding to the hysteresis torque.
【００２４】次に、前記永久磁石２を接着する手順につ
いて説明する。図２の（ａ）に示すように、回転軸１の
外周面に接着剤３ａを塗布する。Next, a procedure for bonding the permanent magnet 2 will be described. As shown in FIG. 2A, an adhesive 3a is applied to the outer peripheral surface of the rotating shaft 1.
【００２５】次に、図２の（ｂ）に示すように、永久磁
石２を嵌め被せ、永久磁石２の下端面が小径部１ｃから
の中径部１ｂの突出面Ｒに当接するまで押し下げる。永
久磁石２の押し下げに伴って、接着剤層３から接着剤３
ｅがはみ出す。ここで、永久磁石２は無着磁とする。そ
の理由は、接着剤３ａの硬化を待っている永久磁石２
が、他の永久磁石（２）と相互に吸着し合ったり、周囲
の磁性粉を吸着したりするのを防止するためである。す
なわち、永久磁石２が他の永久磁石（２）と相互に吸着
し合うと未硬化の接着剤３ａにかかる圧力が不均等にな
るから、これを防ぐ必要がある。しかし、着磁した永久
磁石同士が相互に吸着するのを防ぐには、それぞれを離
して置く必要があり、広い場所を要し、取り扱いに不便
になる。また、着磁した永久磁石２が周囲の磁性粉を吸
着すると、滑らかな回転の障害になるため、これを後で
除去する必要があり、管理の負担が重くなる。Next, as shown in FIG. 2B, the permanent magnet 2 is fitted and covered, and is pushed down until the lower end surface of the permanent magnet 2 comes into contact with the protruding surface R of the middle diameter portion 1b from the small diameter portion 1c. As the permanent magnet 2 is depressed, the adhesive 3
e protrudes. Here, the permanent magnet 2 is not magnetized. The reason is that the permanent magnet 2 waiting for the curing of the adhesive 3a
However, this is to prevent the permanent magnets (2) from adsorbing each other and surrounding magnetic powder from adsorbing. That is, if the permanent magnet 2 attracts each other with the other permanent magnets (2), the pressure applied to the uncured adhesive 3a becomes uneven, and it is necessary to prevent this. However, in order to prevent the magnetized permanent magnets from being attracted to each other, they need to be separated from each other, requiring a large space, which is inconvenient to handle. In addition, if the magnetized permanent magnet 2 adsorbs the surrounding magnetic powder, it hinders smooth rotation, which must be removed later, which increases the management burden.
【００２６】図２の（ｃ）に示すように、接着剤３ａが
硬化すると、永久磁石２が接着剤層３を介して回転軸１
に接着される。前記接着剤層３の厚さＬは、例えば３０
μｍ〜１００μｍ程度である。永久磁石２からはみ出た
接着剤３ｅは、前記永久磁石２の下端面と回転軸１の大
径部１ａとの間に形成される間隙に溜まるので、接着剤
３ｅが摺動部Ｍに漏出することが防止される。その後、
永久磁石２の外周面を多極着磁する。As shown in FIG. 2C, when the adhesive 3a is cured, the permanent magnet 2 is rotated via the adhesive layer 3 by the rotating shaft 1.
Adhered to. The thickness L of the adhesive layer 3 is, for example, 30.
It is about μm to 100 μm. The adhesive 3e protruding from the permanent magnet 2 accumulates in a gap formed between the lower end surface of the permanent magnet 2 and the large diameter portion 1a of the rotating shaft 1, so that the adhesive 3e leaks to the sliding portion M. Is prevented. afterwards,
The outer peripheral surface of the permanent magnet 2 is multipolar magnetized.
【００２７】以上の同軸円筒型トルクリミッタ１０によ
れば、永久磁石２からはみ出た接着剤３ｅが永久磁石２
の下端面と回転軸１の大径部１ａとの間に形成される間
隙に溜まるので、接着剤３ｅが接着面外に漏出すること
が防止される。According to the coaxial cylindrical torque limiter 10 described above, the adhesive 3e protruding from the permanent magnet 2 is
Is accumulated in a gap formed between the lower end face of the rotary shaft 1 and the large-diameter portion 1a of the rotating shaft 1, so that the adhesive 3e is prevented from leaking out of the bonding surface.
【００２８】−第２の実施形態− 第２の実施形態にかかる永久磁石２を接着する手順につ
いて説明する。図３の（ａ）に示すように、回転軸１の
外周面にプライマーＰを塗布し、乾燥させる。前記回転
軸１は、ドラム形状であり、ポリエチレン樹脂，ポリプ
ロピレン樹脂，ポリブテン樹脂等のポリオレフィン樹脂
やポリアセタール樹脂などの合成樹脂材料製である。次
に、図３の（ｂ）に示すように、プライマー処理された
回転軸１’の外周面上に、シアノアクリレート系の接着
剤３ａを塗布する。次に、図３の（ｃ）に示すように、
無着磁の永久磁石２を嵌め被せて、永久磁石２の下端面
が小径部からの中径部の突出面Ｒに当接するまで押し下
げる。そして、図３の（ｄ）に示すように、接着剤３ａ
を硬化させると、回転軸１’に接着剤層３を介して永久
磁石２が接着される。その後、永久磁石２の外周面を多
極着磁する。Second Embodiment A procedure for bonding the permanent magnet 2 according to the second embodiment will be described. As shown in FIG. 3A, a primer P is applied to the outer peripheral surface of the rotating shaft 1 and dried. The rotating shaft 1 has a drum shape and is made of a synthetic resin material such as a polyolefin resin such as a polyethylene resin, a polypropylene resin, and a polybutene resin, and a polyacetal resin. Next, as shown in FIG. 3B, a cyanoacrylate-based adhesive 3a is applied on the outer peripheral surface of the rotating shaft 1 ′ subjected to the primer treatment. Next, as shown in FIG.
The non-magnetized permanent magnet 2 is fitted over and pushed down until the lower end surface of the permanent magnet 2 comes into contact with the protruding surface R from the small diameter portion to the middle diameter portion. Then, as shown in FIG. 3D, the adhesive 3a
Is cured, the permanent magnet 2 is bonded to the rotating shaft 1 ′ via the adhesive layer 3. Thereafter, the outer peripheral surface of the permanent magnet 2 is multipolar magnetized.
【００２９】以上の第２の実施形態によれば、上記第１
の実施形態による効果に加えて、合成樹脂製の回転軸１
を用いるため、優れた摺動性が得られる。また、プライ
マー処理された回転軸１’の外周面と接着剤層３との間
に化学結合が形成されているため、接着力が得にくい合
成樹脂製の回転軸１の外周面に永久磁石２を強固に接着
することができ、永久磁石２の剥離が防止され、トルク
リミッタとしての信頼性が向上する。According to the second embodiment described above, the first
In addition to the effects of the embodiment, the rotating shaft 1 made of synthetic resin
, Excellent slidability is obtained. In addition, since a chemical bond is formed between the outer peripheral surface of the primer-treated rotary shaft 1 ′ and the adhesive layer 3, the permanent magnet 2 Can be firmly bonded, peeling of the permanent magnet 2 is prevented, and reliability as a torque limiter is improved.
【００３０】−第３の実施形態− 第３の実施形態にかかる永久磁石２を接着する手順につ
いて説明する。図４の（ａ）に示すように、回転軸１の
外周面に接着剤３ａを塗布する。この回転軸１は、図２
の回転軸１の中径部１ｂからの大径部１ａの突出面に、
前記中径部１ｂに続く円周方向の溝１Ｕを刻設した構成
である。次に、図４の（ｂ）に示すように、無着磁の永
久磁石２を嵌め被せ、永久磁石２の下端面が小径部から
の中径部の突出面Ｒ（溝１Ｕの内側の周面）に当接する
まで押し下げる。永久磁石２の押し下げに伴って、接着
剤層３から余剰の接着剤３ｅがはみ出す。そして、図４
の（ｃ）に示すように、接着剤３ａが硬化すると、永久
磁石２が接着剤層３を介して回転軸１に接着される。そ
の後、永久磁石２の外周面を多極着磁する。前記余剰の
接着剤３ｅは、溝１Ｕ内に溜まるから、接着剤３ｅが摺
動部Ｍに漏出することが防止される。なお、前記永久磁
石２の下端面と，前記大径部の永久磁石２側の端面（溝
１Ｕの外側の周面）との間には、空気逃げ用の間隙Ｋが
あいているから、溝１Ｕ中の空気を逃がして、接着剤３
ｅを入り込みやすくすることが出来る。以上の第３の実
施形態によれば、溝１Ｕ内に十分な分量の接着剤３ｅを
溜めることが可能なので、接着剤３ｅの漏出防止性能を
いっそう向上できる。Third Embodiment A procedure for bonding the permanent magnet 2 according to a third embodiment will be described. As shown in FIG. 4A, an adhesive 3a is applied to the outer peripheral surface of the rotating shaft 1. This rotating shaft 1 is shown in FIG.
On the protruding surface of the large diameter portion 1a from the medium diameter portion 1b of the rotating shaft 1,
A circumferential groove 1U following the middle diameter portion 1b is formed. Next, as shown in FIG. 4B, a non-magnetized permanent magnet 2 is fitted and covered, and the lower end surface of the permanent magnet 2 is projected from the small-diameter portion to the middle-diameter portion protruding surface R (the inner circumferential surface of the groove 1U). Face down) until it touches. As the permanent magnet 2 is pushed down, excess adhesive 3e protrudes from the adhesive layer 3. And FIG.
As shown in (c), when the adhesive 3a is cured, the permanent magnet 2 is bonded to the rotating shaft 1 via the adhesive layer 3. Thereafter, the outer peripheral surface of the permanent magnet 2 is multipolar magnetized. Since the surplus adhesive 3e accumulates in the groove 1U, the leakage of the adhesive 3e to the sliding portion M is prevented. Since there is a gap K for air escape between the lower end surface of the permanent magnet 2 and the end surface of the large diameter portion on the side of the permanent magnet 2 (the outer peripheral surface of the groove 1U), the groove K is provided. Release the air in 1U and use adhesive 3
e can be easily entered. According to the third embodiment described above, a sufficient amount of the adhesive 3e can be stored in the groove 1U, so that the performance of preventing the adhesive 3e from leaking can be further improved.
【００３１】−第４の実施形態− 第４の実施形態にかかる永久磁石２を接着する手順につ
いて説明する。図５の（ａ）に示すように、回転軸１の
外周面に接着剤３ａを塗布する。この回転軸１は、外周
面から中径部と大径部とを含む段差付きフランジ１Ｆが
突出した構成である。次に、図５の（ｂ）に示すよう
に、無着磁の永久磁石２を嵌め被せ、永久磁石２の下端
面が段差付きフランジ１Ｆの上端面（中径部側端面）Ｔ
に当接するまで押し下げる。永久磁石２の押し下げに伴
って、接着剤層３から余剰の接着剤３ｅがはみ出す。そ
して、図５の（ｃ）に示すように、接着剤３ａが硬化す
ると、永久磁石２が接着剤層３を介して回転軸１に接着
される。その後、永久磁石２の外周面を多極着磁する。
前記接着剤３ｅは、前記永久磁石２の下端面と前記段差
付きフランジ１Ｆの下側（大径部）の突出面との間の空
間に溜まるから、接着剤３ｅが摺動部Ｍに漏出すること
が防止される。以上の第４の実施形態によれば、フラン
ジ１Ｆの厚みを大きくして永久磁石２のサイズを相対的
に小さくしなくても接着剤３ｅに対する遮蔽性能を十分
に高めることができる。Fourth Embodiment A procedure for bonding a permanent magnet 2 according to a fourth embodiment will be described. As shown in FIG. 5A, an adhesive 3a is applied to the outer peripheral surface of the rotating shaft 1. The rotating shaft 1 has a configuration in which a stepped flange 1F including a middle diameter portion and a large diameter portion protrudes from the outer peripheral surface. Next, as shown in FIG. 5 (b), the non-magnetized permanent magnet 2 is fitted and covered, and the lower end surface of the permanent magnet 2 is the upper end surface (medium diameter portion side end surface) T of the stepped flange 1F.
Press down until it touches. As the permanent magnet 2 is pushed down, excess adhesive 3e protrudes from the adhesive layer 3. Then, as shown in FIG. 5C, when the adhesive 3a is hardened, the permanent magnet 2 is bonded to the rotating shaft 1 via the adhesive layer 3. Thereafter, the outer peripheral surface of the permanent magnet 2 is multipolar magnetized.
The adhesive 3e accumulates in the space between the lower end surface of the permanent magnet 2 and the lower (large diameter) projecting surface of the stepped flange 1F, so that the adhesive 3e leaks to the sliding portion M. Is prevented. According to the fourth embodiment described above, the shielding performance against the adhesive 3e can be sufficiently improved without increasing the thickness of the flange 1F and relatively reducing the size of the permanent magnet 2.
【００３２】上記第１〜第３の実施形態によれば、回転
軸１にフランジを突出させないので、永久磁石２のサイ
ズを相対的に大きくすることが可能となり、トルクリミ
ッタの小型化，高トルク化の見地から有利である。According to the first to third embodiments, since the flange is not projected from the rotary shaft 1, the size of the permanent magnet 2 can be relatively increased, and the torque limiter can be reduced in size and the torque can be increased. This is advantageous from the viewpoint of chemical development.
【００３３】−第５の実施形態− 図６は、本発明の第５の実施形態にかかる同軸円筒型ト
ルクリミッタ９０を用いた給紙装置の重送防止用リバー
スローラを示す端面図である。この同軸円筒型トルクリ
ミッタ９０において、金属製シャフトＳの周りには、回
転軸１が嵌合されている。前記回転軸１の外周面には、
円筒状の半硬質磁性体５が固着される。回転筒４の内周
面には、接着剤層３を介して永久磁石２が接着されてい
る。すなわち、回転筒４の下部の内周面は、肉厚を変え
ることで段差が付けられており、前記段差の上端面に前
記永久磁石２の下端面を当接させて当該永久磁石２を接
着し、前記永久磁石２の下端面と，前記段差の下側面と
の間に形成される隙間に、余剰の接着剤３ｅが溜められ
ている。以上の第５の実施形態によれば、回転筒４に永
久磁石２を接着するタイプの同軸円筒型トルクリミッタ
９０でも、隙間に余剰の接着剤３ｅを溜めて、接着剤３
ｅが永久磁石２と半硬質磁性体５とのギャップや摺動部
Ｍなどに漏出することを防止できる。Fifth Embodiment FIG. 6 is an end view showing a double feed prevention reverse roller of a paper feeder using a coaxial cylindrical torque limiter 90 according to a fifth embodiment of the present invention. In the coaxial cylindrical torque limiter 90, the rotating shaft 1 is fitted around the metal shaft S. On the outer peripheral surface of the rotating shaft 1,
The cylindrical semi-hard magnetic body 5 is fixed. The permanent magnet 2 is adhered to the inner peripheral surface of the rotary cylinder 4 via an adhesive layer 3. That is, the inner peripheral surface of the lower part of the rotary cylinder 4 is provided with a step by changing the wall thickness, and the lower end of the permanent magnet 2 is brought into contact with the upper end of the step to adhere the permanent magnet 2. An excess adhesive 3e is stored in a gap formed between the lower end surface of the permanent magnet 2 and the lower surface of the step. According to the fifth embodiment described above, even in the coaxial cylindrical torque limiter 90 of the type in which the permanent magnet 2 is bonded to the rotary cylinder 4, the excess adhesive 3e is accumulated in the gap, and the adhesive 3
e can be prevented from leaking into the gap between the permanent magnet 2 and the semi-hard magnetic body 5 and the sliding portion M.
【００３４】[0034]
【発明の効果】本発明の同軸円筒型トルクリミッタによ
れば、永久磁石を接着する回転軸や回転筒に段差を付け
て隙間を形成し、その隙間に余剰の接着剤を溜めるの
で、接着面外に接着剤が漏出して、摺動性や回転特性に
悪影響を与えることを防止できる。According to the coaxial cylindrical torque limiter of the present invention, a gap is formed by forming a step on the rotating shaft or the rotating cylinder to which the permanent magnet is bonded, and the excess adhesive is accumulated in the gap. It is possible to prevent the adhesive from leaking out and adversely affecting the slidability and the rotation characteristics.
【図１】第１の実施形態にかかる同軸円筒型トルクリミ
ッタを用いた給紙装置の重送防止用リバースローラを示
す端面図である。FIG. 1 is an end view showing a reverse roller for preventing double feed of a paper feeder using a coaxial cylindrical torque limiter according to a first embodiment;
【図２】第１の実施形態にかかる円筒状の永久磁石を回
転軸の外周面に接着する手順を示す説明図である。FIG. 2 is an explanatory diagram showing a procedure for bonding a cylindrical permanent magnet according to the first embodiment to an outer peripheral surface of a rotating shaft.
【図３】第２の実施形態にかかる円筒状の永久磁石を回
転軸の外周面に接着する手順を示す説明図である。FIG. 3 is an explanatory view showing a procedure for bonding a cylindrical permanent magnet to an outer peripheral surface of a rotating shaft according to a second embodiment.
【図４】第３の実施形態にかかる円筒状の永久磁石を回
転軸の外周面に接着する手順を示す説明図である。FIG. 4 is an explanatory view showing a procedure for bonding a cylindrical permanent magnet to an outer peripheral surface of a rotating shaft according to a third embodiment.
【図５】第４の実施形態にかかる円筒状の永久磁石を回
転軸の外周面に接着する手順を示す説明図である。FIG. 5 is an explanatory diagram showing a procedure for bonding a cylindrical permanent magnet to an outer peripheral surface of a rotating shaft according to a fourth embodiment.
【図６】第５の実施形態にかかる同軸円筒型トルクリミ
ッタを用いた給紙装置の重送防止用リバースローラを示
す端面図である。FIG. 6 is an end view showing a double feed prevention reverse roller of a sheet feeding device using a coaxial cylindrical torque limiter according to a fifth embodiment.
【図７】従来の同軸円筒型トルクリミッタ５００を用い
た給紙装置の重送防止用リバースローラの一例を示す端
面図である。FIG. 7 is an end view showing an example of a reverse roller for preventing double feed of a paper feeder using a conventional coaxial cylindrical torque limiter 500.
【図８】円筒状の永久磁石を回転軸の外周面に接着する
手順を示す説明図である。FIG. 8 is an explanatory view showing a procedure for bonding a cylindrical permanent magnet to an outer peripheral surface of a rotating shaft.
１０，９０ 同軸円筒型トルクリミッタ １，１’ 回転軸 １ａ 大径部 １ｂ 中径部 １ｃ 小径部 １Ｆ 段差付きフランジ １Ｕ 溝 ２ 永久磁石 ３ 接着剤層 ３ａ 接着剤 ３ｅ 余剰の接着剤 ４ 回転筒 ４ａ 蓋体 ５ 半硬質磁性体 Ａ ギャップ Ｇ ゴムローラ Ｍ 摺動部 Ｐ プライマー Ｓ 金属製シャフト 10,90 Coaxial cylindrical torque limiter 1,1 'Rotating shaft 1a Large diameter portion 1b Medium diameter portion 1c Small diameter portion 1F Stepped flange 1U groove 2 Permanent magnet 3 Adhesive layer 3a Adhesive 3e Excess adhesive 4 Rotating cylinder 4a Lid 5 Semi-hard magnetic material A Gap G Rubber roller M Sliding part P Primer S Metal shaft
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平８−126282（ＪＰ，Ａ) 特開 平６−78483（ＪＰ，Ａ) 特開 平８−251850（ＪＰ，Ａ) 特開 平６−311678（ＪＰ，Ａ) 実開 平８−550（ＪＰ，Ｕ) 実開 昭53−31209（ＪＰ，Ｕ) 実開 平３−321（ＪＰ，Ｕ) 実開 昭58−168874（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) F16D 7/02 H02K 1/27 501 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-8-126282 (JP, A) JP-A-6-78483 (JP, A) JP-A-8-251850 (JP, A) JP-A-6-78850 311678 (JP, A) Japanese Utility Model 8-550 (JP, U) Japanese Utility Model 53-31209 (JP, U) Japanese Utility Model 3-321 (JP, U) Japanese Utility Model 58-168874 (JP, U) (58) Field surveyed (Int. Cl. 7 , DB name) F16D 7/02 H02K 1/27 501
Claims (7)
石（２）を接着し、回転筒（４）の内周面に円筒状の半
硬質磁性体（５）を固着し、ギャップをあけて前記永久
磁石（２）と前記半硬質磁性体（５）を対向させ且つ相
対的に回転しうるように前記回転軸（１）と前記回転筒
（４）とを同軸上に配置し、前記永久磁石（２）と前記
半硬質磁性体（５）との間に生じるヒステリシストルク
により前記回転軸（１）と前記回転筒（４）の間で回転
を伝達する同軸円筒型トルクリミッタ（１０）であっ
て、 前記回転軸（１）が、摺動部（Ｍ）を兼ねる大径部（１
ａ）と，前記永久磁石（２）の接着面を形成される小径
部（１ｃ）と，前記大径部（１ａ）と前記小径部（１
ｃ）との中間に形成され且つ両者との間に段差を付ける
中径部（１ｂ）とからなり、前記小径部（１ｃ）からの
前記中径部（１ｂ）の突出面（Ｒ）に前記永久磁石
（２）の一端面を当接させて当該永久磁石（２）を接着
し、前記永久磁石（２）の一端面と，前記中径部（１
ｂ）からの前記大径部（１ａ）の突出面との間に余剰の
接着剤（３ｅ）を溜める隙間を形成したことを特徴とす
る同軸円筒型トルクリミッタ（１０）。 A cylindrical permanent magnet is provided on an outer peripheral surface of a rotating shaft (1).
A stone (2) is adhered, and a cylindrical half is attached to the inner peripheral surface of the rotating cylinder (4).
The hard magnetic material (5) is fixed, and the permanent
The magnet (2) is opposed to the semi-hard magnetic body (5)
The rotating shaft (1) and the rotating cylinder so as to be able to rotate in opposite directions.
(4) and the permanent magnet (2) and the
Hysteresis torque generated between semi-hard magnetic body (5)
Rotates between the rotating shaft (1) and the rotating cylinder (4)
Coaxial cylindrical torque limiter (10)
The rotary shaft (1) has a large diameter portion (1) serving also as a sliding portion (M).
a) and a small diameter on which an adhesive surface of the permanent magnet (2) is formed
Part (1c), the large diameter part (1a) and the small diameter part (1
c) is formed in the middle between the two and has a step between them.
It consists of a middle diameter part (1b),
The permanent magnet is provided on the protruding surface (R) of the middle diameter portion (1b).
The permanent magnet (2) is bonded by contacting one end surface of (2).
Then, one end face of the permanent magnet (2) and the middle diameter portion (1
b) between the protruding surface of the large diameter portion (1a) from
A gap for storing the adhesive (3e) is formed.
Coaxial cylindrical torque limiter (10).
ッタ（１０）において、無着磁の前記永久磁石（２）を
前記回転軸（１）の外周面に接着した後、その永久磁石
（２）の外周面を多極着磁することを特徴とする同軸円
筒型トルクリミッタ（１０）。 2. A coaxial cylindrical torque limiter according to claim 1.
The non-magnetized permanent magnet (2)
After bonding to the outer peripheral surface of the rotating shaft (1), the permanent magnet
(2) Coaxial circle characterized in that the outer peripheral surface is multipolar magnetized
Cylindrical torque limiter (10).
ッタにおいて、前記回転軸（１）が合成樹脂製であり、
該合成樹脂製の回転軸（１）の外周面をプライマー処理
してから接着剤を塗布し、無着磁の前記永久磁石を前記
回転軸（１）の外周面に接着した後、その永久磁石
（２）の外周面を多極着磁することを特徴とする同軸円
筒型トルクリミッタ。 3. A coaxial cylindrical torque limiter according to claim 2,
The rotary shaft (1) is made of a synthetic resin;
The outer peripheral surface of the synthetic resin rotating shaft (1) is treated with a primer.
And then apply the adhesive, the non-magnetized permanent magnet
After bonding to the outer peripheral surface of the rotating shaft (1), the permanent magnet
(2) Coaxial circle characterized in that the outer peripheral surface is multipolar magnetized
Cylindrical torque limiter.
石（２）を接着し、回転筒（４）の内周面に円筒状の半
硬質磁性体（５）を固着し、ギャップをあけて前記永久
磁石（２）と前記半硬質磁性体（５）を対向させ且つ相
対的に回転しうるように前記回転軸（１）と前記回転筒
（４）とを同軸上に配置し、前記永久磁石（２）と前記
半硬質磁性体（５）との間に生じるヒステリシストルク
により前記回転軸（１）と前記回転筒（４）の間で回転
を伝達する同軸円筒型トルクリミッタであって、 前記回転軸（１）が、摺動部（Ｍ）を兼ねる大径部（１
ａ）と，前記永久磁石（２）の接着面を形成される小径
部（１ｃ）と，前記大径部（１ａ）と前記小径部（１
ｃ）との中間に形成され且つ両者との間に段差を付ける
中径部（１ｂ）とからなり、前記中径部（１ｂ）からの
前記大径部（１ａ）の突出面に前記中径部（１ｂ）に続
く円周方向の溝（１Ｕ）を刻設し、前記小径部（１ｃ）
からの前記中径部（１ｂ）の突出面（Ｒ）に前記永久磁
石（２）の一端面を当接させて当該永久磁石（２）を接
着し、前記溝（１Ｕ）内に余剰の接着剤（３ｅ）を溜め
ることを特徴とする同軸円筒型トルクリミッタ。4. A cylindrical permanent magnet (2) is adhered to an outer peripheral surface of a rotating shaft (1), and a cylindrical semi-hard magnetic body (5) is fixed to an inner peripheral surface of a rotating cylinder (4). The rotating shaft (1) and the rotating cylinder so that the permanent magnet (2) and the semi-hard magnetic body (5) face each other with a gap therebetween and can rotate relatively.
(4) is arranged coaxially, and a hysteresis torque generated between the permanent magnet (2) and the semi-hard magnetic body (5) causes a rotation between the rotating shaft (1) and the rotating cylinder (4) . A coaxial cylindrical torque limiter for transmitting rotation, wherein the rotating shaft (1) has a large diameter portion (1) serving also as a sliding portion (M).
a), a small-diameter portion (1c) on which an adhesive surface of the permanent magnet (2) is formed, the large-diameter portion (1a), and the small-diameter portion (1).
c) and a middle diameter part (1b) formed between the two and having a step between them. The middle diameter part (1b) projects from the middle diameter part (1b) to the large diameter part (1a). A circumferential groove (1 U ) following the portion (1b) is engraved, and the small-diameter portion (1c) is formed.
The permanent magnet (2) is adhered by bringing one end surface of the permanent magnet (2) into contact with the protruding surface (R ) of the middle diameter portion (1b) from above, and the excessive magnet is adhered in the groove (1U) . A coaxial cylindrical torque limiter, which stores the agent (3e).
石（２）を接着し、回転筒（４）の内周面に円筒状の半
硬質磁性体（５）を固着し、ギャップをあけて前記永久
磁石（２）と前記半硬質磁性体（５）を対向させ且つ相
対的に回転しうるように前記回転軸（１）と前記回転筒
（４）とを同軸上に配置し、前記永久磁石（２）と前記
半硬質磁性体（５）との間に生じるヒステリシストルク
により前記回転軸（１）と前記回転筒（４）の間で回転
を伝達する同軸円筒型トルクリミッタであって、 前記回転軸（１）の外周面から中径部と大径部とを含む
段差付きフランジ（１Ｆ）が突出し、その段差付きフラ
ンジ（１Ｆ）の中径部側端面（Ｔ）に前記永久磁石
（２）の一端面を当接させて当該永久磁石（２）を接着
し、前記永久磁石（２）の一端面と，前記段差付きフラ
ンジ（１Ｆ）の前記中径部からの前記大径部の突出面と
の間に余剰の接着剤（３ｅ）を溜める隙間を形成したこ
とを特徴とする同軸円筒型トルクリミッタ。5. A cylindrical permanent magnet (2) is adhered to an outer peripheral surface of a rotating shaft (1), and a cylindrical semi-hard magnetic body (5) is fixed to an inner peripheral surface of a rotating cylinder (4). The rotating shaft (1) and the rotating cylinder so that the permanent magnet (2) and the semi-hard magnetic body (5) face each other with a gap therebetween and can rotate relatively.
(4) is arranged coaxially, and a hysteresis torque generated between the permanent magnet (2) and the semi-hard magnetic body (5) causes a rotation between the rotating shaft (1) and the rotating cylinder (4) . A coaxial cylindrical torque limiter for transmitting rotation, wherein a stepped flange (1F) including a middle diameter portion and a large diameter portion protrudes from an outer peripheral surface of the rotating shaft (1) , and the stepped flange (1F) The permanent magnet is attached to the end face (T) on the middle diameter side.
The permanent magnet (2) is adhered by bringing one end surface of the permanent magnet (2) into contact, and the large-diameter portion from the medium-diameter portion of the stepped flange (1F) to the one end surface of the permanent magnet (2). A gap for storing excess adhesive (3e) is formed between the coaxial cylindrical torque limiter and the protruding surface of the coaxial cylindrical torque limiter.
筒型トルクリミッタにおいて、無着磁の前記永久磁石
（２）を前記回転軸（１）の外周面に接着した後、その
永久磁石（２）の外周面を多極着磁することを特徴とす
る同軸円筒型ト ルクリミッタ。 6. A coaxial circle according to claim 4 or claim 5.
In the cylindrical torque limiter, the non-magnetized permanent magnet is used.
After bonding (2) to the outer peripheral surface of the rotating shaft (1),
The outer peripheral surface of the permanent magnet (2) is multipolar magnetized.
Coaxial cylinder type door Rukurimitta that.
石（２）を接着し、回転軸（１）の外周面に円筒状の半
硬質磁性体（５）を固着し、ギャップをあけて前記永久
磁石（２）と前記半硬質磁性体（５）を対向させ且つ相
対的に回転しうるように前記回転筒（４）と前記回転軸
（１）とを同軸上に配置し、前記永久磁石（２）と前記
半硬質磁性体（５）との間に生じるヒステリシストルク
により前記回転筒（４）と前記回転軸（１）の間で回転
を伝達する同軸円筒型トルクリミッタ（９０）であっ
て、 前記回転筒（４）の肉厚を変えて内周面に段差を形成
し、前記段差の上側面に前記永久磁石（２）の一端面を
当接させて当該永久磁石（２）を接着し、前記永久磁石
（２）の一端面と，前記段差の下側面との間に余剰の接
着剤（３ｅ）を溜める隙間を形成したことを特徴とする
同軸円筒型トルクリミッタ（９０）。 7. A cylindrical permanent magnet is provided on the inner peripheral surface of the rotary cylinder (4).
A stone (2) is adhered, and a cylindrical half is attached to the outer peripheral surface of the rotating shaft (1).
The hard magnetic material (5) is fixed, and the permanent
The magnet (2) is opposed to the semi-hard magnetic body (5)
The rotating cylinder (4) and the rotating shaft so as to be able to rotate in opposite directions.
(1) and the permanent magnet (2) and the
Hysteresis torque generated between semi-hard magnetic body (5)
Rotates between the rotary cylinder (4) and the rotary shaft (1)
Coaxial cylindrical torque limiter (90)
Te, forming the step on the inner peripheral surface by changing the thickness of the rotary cylinder (4)
Then, one end surface of the permanent magnet (2) is attached to the upper surface of the step.
The permanent magnet (2) is adhered by being brought into contact with the permanent magnet (2).
Excessive contact between one end surface of (2) and the lower surface of the step
A gap for storing the adhesive (3e) is formed.
Coaxial cylindrical torque limiter (90).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11548197A JP3316795B2 (en) | 1997-05-06 | 1997-05-06 | Coaxial cylindrical torque limiter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11548197A JP3316795B2 (en) | 1997-05-06 | 1997-05-06 | Coaxial cylindrical torque limiter |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001338810A Division JP2002195289A (en) | 2001-11-05 | 2001-11-05 | Coaxial cylindrical torque limiter and method of manufacturing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10306832A JPH10306832A (en) | 1998-11-17 |
| JP3316795B2 true JP3316795B2 (en) | 2002-08-19 |
Family
ID=14663597
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11548197A Expired - Lifetime JP3316795B2 (en) | 1997-05-06 | 1997-05-06 | Coaxial cylindrical torque limiter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3316795B2 (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006098318A (en) * | 2004-09-30 | 2006-04-13 | Saginomiya Seisakusho Inc | Vortex flowmeter |
| JP2006098317A (en) * | 2004-09-30 | 2006-04-13 | Saginomiya Seisakusho Inc | Vortex flowmeter |
| JP2006174655A (en) * | 2004-12-17 | 2006-06-29 | Nidec Sankyo Corp | Motor and its manufacturing method |
| JP4630177B2 (en) * | 2005-11-16 | 2011-02-09 | トックベアリング株式会社 | Torque limiter |
| JP2008008429A (en) * | 2006-06-29 | 2008-01-17 | Yamauchi Corp | Torque limiter |
| WO2010134647A1 (en) * | 2009-05-22 | 2010-11-25 | Ｎｅｃアンテン株式会社 | Reflector device and parabolic antenna using the same |
| JP2010166818A (en) * | 2010-05-07 | 2010-07-29 | Nidec Sankyo Corp | Method for manufacturing motor |
| JP2014180117A (en) * | 2013-03-14 | 2014-09-25 | Hitachi Automotive Systems Ltd | Rotary electric machine |
| JP6746304B2 (en) * | 2015-12-02 | 2020-08-26 | 日本発條株式会社 | Vehicle stabilizer device |
-
1997
- 1997-05-06 JP JP11548197A patent/JP3316795B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH10306832A (en) | 1998-11-17 |
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