JP5913634B2 - Torque limiter - Google Patents

Torque limiter Download PDF

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JP5913634B2
JP5913634B2 JP2014551864A JP2014551864A JP5913634B2 JP 5913634 B2 JP5913634 B2 JP 5913634B2 JP 2014551864 A JP2014551864 A JP 2014551864A JP 2014551864 A JP2014551864 A JP 2014551864A JP 5913634 B2 JP5913634 B2 JP 5913634B2
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ring member
inner ring
torque
main body
coil spring
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JPWO2015162658A1 (en
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幸雄 根岸
幸雄 根岸
岳大 田原
岳大 田原
太郎 磯部
太郎 磯部
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Origin Electric Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D13/00—Friction clutches
    • F16D13/08—Friction clutches with a helical band or equivalent member, which may be built up from linked parts, with more than one turn embracing a drum or the like, with or without an additional clutch actuating the end of the band
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D41/00—Freewheels or freewheel clutches
    • F16D41/20—Freewheels or freewheel clutches with expandable or contractable clamping ring or band

Description

本発明は、負荷トルクがトルク制限値以下のときはトルクを伝達し、負荷トルクがトルク制限値を超えたときはトルク伝達を遮断するトルクリミッタに関する。   The present invention relates to a torque limiter that transmits torque when a load torque is less than or equal to a torque limit value, and interrupts torque transmission when the load torque exceeds a torque limit value.

トルクリミッタは、負荷トルクがトルク制限値以下のときはトルクを伝達し、負荷トルクがトルク制限値を超えたときはトルク伝達を遮断するものであり、双方向トルクリミッタと一方向性トルクリミッタとがある。   The torque limiter transmits torque when the load torque is less than or equal to the torque limit value, and interrupts torque transmission when the load torque exceeds the torque limit value. The bidirectional torque limiter and the unidirectional torque limiter There is.

双方向トルクリミッタは、いずれの回転方向の負荷トルクに対しても、それぞれトルク制限値以下のときはトルクを伝達し、トルク制限値を超えた負荷トルクが加わるとトルクの伝達を阻止するものである。双方向トルクリミッタとして、いずれの回転方向に対しても同じトルク制限値を有したもの、あるいは回転方向によって異なるトルク制限値を有したものがある（例えば、特許文献１）。   The bidirectional torque limiter transmits torque when load torque is below the torque limit value for any rotational direction, and prevents torque transmission when load torque exceeding the torque limit value is applied. is there. Some bidirectional torque limiters have the same torque limit value in any rotation direction, or have different torque limit values depending on the rotation direction (for example, Patent Document 1).

また、一方向性トルクリミッタは、一方向は負荷トルクがトルク制限値以下のときはトルクを伝達し、トルク制限値を超えた負荷トルクのときはトルク伝達を遮断し、逆方向はトルクの伝達を遮断するものである。一方向性トルクリミッタとして、ワンウェイクラッチにコイルバネを巻いて構成されたものがある（特許文献２参照）。   The unidirectional torque limiter transmits torque when the load torque is below the torque limit value in one direction, interrupts torque transmission when the load torque exceeds the torque limit value, and transmits torque in the reverse direction. Is to shut off. One-way torque limiter is configured by winding a one-way clutch around a coil spring (see Patent Document 2).

このようなトルクリミッタは、複写機、プリンタ、あるいはファクシミリ装置などの電子情報機器の給紙装置に用いられ、例えば、双方向トルクリミッタは、紙の二重送りを防ぐと共に、紙詰まりの場合にも紙送り機構を逆転させて、容易に詰まった紙を除去できる機構になっている。   Such a torque limiter is used in a paper feeding device of an electronic information device such as a copying machine, a printer, or a facsimile machine. For example, the bidirectional torque limiter prevents double feeding of paper and also in the case of a paper jam. Also, the paper feeding mechanism is reversed so that the jammed paper can be easily removed.

通常、トルクリミッタは、図２に示すように、特殊樹脂材で形成された内輪部材１１と、その内輪部材１１に巻装されたコイルばね１２と、コイルばね１２の両端部を係止し内輪部材１１の外側に設けられた外輪部材１３とから構成される。内輪部材として特殊樹脂材を用いるのは、内輪部材とコイルばねとの摩擦によりトルクを発生させるようにしているので、内輪部材の耐性を高めるためである。特殊樹脂材は炭素繊維を多く含有した樹脂、例えば、ＰＰＳ（ポリフェニレンサルファイド樹脂）が用いられる。   Normally, as shown in FIG. 2, the torque limiter includes an inner ring member 11 formed of a special resin material, a coil spring 12 wound around the inner ring member 11, and both ends of the coil spring 12 to lock the inner ring. The outer ring member 13 is provided outside the member 11. The reason why the special resin material is used as the inner ring member is to increase the resistance of the inner ring member because the torque is generated by the friction between the inner ring member and the coil spring. As the special resin material, a resin containing a large amount of carbon fiber, for example, PPS (polyphenylene sulfide resin) is used.

トルクリミッタを給紙装置に用いる際には、トルクリミッタの外輪部材１３にゴムローラが取り付けられる。給紙装置にて給紙する紙の大きさが大きい場合には、複数のゴムローラや長いゴムローラが必要となる場合があり、その場合にはシャフトに複数のトルクリミッタを取り付けることで対応している。   When the torque limiter is used in a paper feeder, a rubber roller is attached to the outer ring member 13 of the torque limiter. When the size of paper fed by the paper feeding device is large, a plurality of rubber rollers or a long rubber roller may be required. In this case, a plurality of torque limiters are attached to the shaft. .

特開平９−１６６１５３号公報JP-A-9-166153 特開２００１−２０８１０８号公報JP 2001-208108 A

しかし、複数のトルクリミッタを用いると給紙装置としてコスト高となる。そこで、トルクリミッタ自体を長いものとし、一つのトルクリミッタに複数のゴムローラや長いゴムローラを取り付けることが考えられる。トルクリミッタ自体を長いものとした場合、前述したように、内輪部材は炭素繊維を多く含有した特殊樹脂材が用いられるので高価となる。特殊樹脂部材は、金属と比較すれば安価なものの、材料コストは比較的高価であり、内輪容積（体積）が大きい場合にはローコスト化を実現できない。   However, if a plurality of torque limiters are used, the cost of the sheet feeding device increases. Therefore, it is conceivable that the torque limiter itself is long and a plurality of rubber rollers or long rubber rollers are attached to one torque limiter. When the torque limiter itself is long, as described above, the inner ring member is expensive because a special resin material containing a large amount of carbon fiber is used. The special resin member is less expensive than metal, but the material cost is relatively expensive. If the inner ring volume (volume) is large, low cost cannot be realized.

本発明の目的は、安価で複数のゴムローラや長いゴムローラを取り付けることができるトルクリミッタを提供することである。   An object of the present invention is to provide a torque limiter capable of attaching a plurality of rubber rollers or a long rubber roller at low cost.

本発明のトルクリミッタは、「特殊樹脂素材で形成された内輪部材本体と、前記内輪部材本体に巻装されたコイルばねと、一般樹脂素材で形成され、前記内輪部材本体と一体に回転するように前記内輪部材本体の先端に嵌め合わされた内輪部材延長部と、前記コイルばねが巻装された内輪部材本体及び前記内輪部材延長部を包囲するように設けられた外輪部材とを備え、
前記外輪部材は、その一方端部には前記コイルばねの両端部が係止されるとともに、他方端部には前記内輪部材延長部を係止する抜け防止部が形成され、
前記内輪部材延長部は、前記内輪部材本体の先端から前記外輪部材の抜け防止部まで延びる軸状部分を有しており、
前記内輪部材本体または前記外輪部材の負荷トルクがトルク制限値以下のときはトルクを伝達し、前記負荷トルクがトルク制限値を超えたときは、前記内輪部材本体と前記コイルばねとの間で空転が生じてトルクの伝達を遮断する」ことを特徴とする。 The torque limiter according to the present invention includes: an inner ring member main body formed of a special resin material, a coil spring wound around the inner ring member main body, a general resin material, and rotating integrally with the inner ring member main body. An inner ring member extension fitted to the tip of the inner ring member main body, an inner ring member main body around which the coil spring is wound, and an outer ring member provided so as to surround the inner ring member extension.
The outer ring member has one end portion engaged with both end portions of the coil spring, and the other end portion formed with a slip prevention portion for engaging the inner ring member extension portion,
The inner ring member extension has an axial portion extending from the tip of the inner ring member main body to the outer ring member drop prevention part,
The load torque of the inner ring member body or the outer ring member to transmit torque when the following torque limit value, when the load torque exceeds the torque limit value, idle between said inner ring member main body and the coil spring Is generated and the transmission of torque is cut off ".

本発明によれば、内輪部材を内輪部材本体と内輪部材延長部とで形成し、コイルばねとの摩擦部分である内輪部材本体は特殊樹脂材で形成し、コイルばねとの摩擦部分以外である内輪部材延長部は一般樹脂材で形成するので、
安価にできる。また、外輪部材を内輪部材本体及び内輪部材延長部を包囲するように設け、外輪部材の端部に内輪部材延長部の抜け防止部を形成しているので、複数のゴムローラや長いゴムローラを外輪部材に容易に取り付けることができる。さらに、内輪部材延長部が、内輪部材本体の先端から外輪部材の端部の抜け防止部まで延びる軸状部分を有し、シャフトの役目を果たすので、シャフトを別に用意する必要がない。 According to the present invention, the inner ring member is formed by the inner ring member main body and the inner ring member extension, and the inner ring member main body, which is a friction portion with the coil spring, is formed of the special resin material and is other than the friction portion with the coil spring. Because the inner ring member extension is made of general resin material,
Can be cheap. In addition, the outer ring member is provided so as to surround the inner ring member main body and the inner ring member extension, and the inner ring member extension prevention part is formed at the end of the outer ring member. Can be easily attached to. Furthermore, since the inner ring member extension has an axial portion extending from the tip of the inner ring member main body to the removal preventing portion at the end of the outer ring member and serves as a shaft, it is not necessary to prepare a separate shaft.

本発明の実施形態に係るトルクリミッタの断面図。Sectional drawing of the torque limiter which concerns on embodiment of this invention. 従来のトルクリミッタの断面図。Sectional drawing of the conventional torque limiter.

以下、本発明の実施形態を説明する。図１は本発明の実施形態に係るトルクリミッタの断面図である。内輪部材は、内輪部材本体１１ａと内輪部材延長部１１ｂとで形成される。内輪部材延長部１１ｂを設け、内輪部材延長部１１ｂに対応して外輪部材１３を長くすることでトルクリミッタ自体を長いものに形成している。   Embodiments of the present invention will be described below. FIG. 1 is a cross-sectional view of a torque limiter according to an embodiment of the present invention. The inner ring member is formed of an inner ring member main body 11a and an inner ring member extension portion 11b. The inner ring member extension portion 11b is provided, and the outer ring member 13 is lengthened corresponding to the inner ring member extension portion 11b, so that the torque limiter itself is formed long.

内輪部材本体１１ａにはコイルばね１２が巻装され、内輪部材本体１１ａの外面とコイルばね１２との摩擦によりトルクを発生する。コイルばね１２としては、例えば金属バネを用いる。また、内輪部材本体１１ａは、炭素繊維を多く含有した特殊樹脂材、例えば、ＰＰＳ（ポリフェニレンサルファイド樹脂）で形成される。これは、内輪部材本体１１ａは金属であるコイルばね１２との摩擦によりトルクを発生させるようにしているので、コイルばね１２との摩擦部分である内輪部材本体１１ａの耐性を高めるためである。   A coil spring 12 is wound around the inner ring member main body 11 a, and torque is generated by friction between the outer surface of the inner ring member main body 11 a and the coil spring 12. For example, a metal spring is used as the coil spring 12. The inner ring member main body 11a is formed of a special resin material containing a large amount of carbon fibers, for example, PPS (polyphenylene sulfide resin). This is because the inner ring member main body 11a generates torque by friction with the coil spring 12, which is a metal, so that the resistance of the inner ring member main body 11a, which is a friction part with the coil spring 12, is increased.

一方、内輪部材延長部１１ｂは一般樹脂材で形成される。これは、内輪部材延長部１１ｂはコイルばね１２との摩擦によりトルクを発生させないので、コイルばね１２との摩擦部分がなく耐性を高める必要がないからである。
また、内輪部材延長部１１ｂは内輪部材本体１１ａに機械的に連結される。
例えば、内輪部材延長部１１ｂの一方端部をＤカットに形成し、内輪部材本体１１ａに形成されたＤ穴に内輪部材延長部１１ｂの一方端部を挿入して、内輪部材延長部１１ｂは、内輪部材本体１１ａと一体に回転するように内輪部材本体１１ａの先端に嵌め合わせて連結される。 On the other hand, the inner ring member extension 11b is formed of a general resin material. This is because the inner ring member extension portion 11b does not generate torque due to friction with the coil spring 12, so there is no friction portion with the coil spring 12 and there is no need to increase resistance.
The inner ring member extension 11b is mechanically connected to the inner ring member main body 11a.
For example, one end of the inner ring member extension 11b is formed in a D-cut, and one end of the inner ring member extension 11b is inserted into a D hole formed in the inner ring member main body 11a . The inner ring member main body 11a is fitted and connected to the tip of the inner ring member main body 11a so as to rotate integrally with the inner ring member main body 11a .

外輪部材１３は筒状に形成され、コイルばね１２が巻装された内輪部材本体１１ａ及び内輪部材延長部１１ｂを内部に収納し、これらを包囲するように形成される。そして、コイルばね１２は外輪部材１３の一方端部の内側で係止される。外輪部材１３の内面側にはコイルばね１２の両端部を係止する係止溝が設けられ、この係止溝にコイルばね１２の両端部が係合することによって、コイルばね１２は外輪部材１３に係止される。また、内輪部材延長部１１ｂ及び外輪部材１４の他方端部には、内輪部材延長部１１ｂが外輪部材１３から抜け出さないようにするための抜け防止部１４が形成され、内輪部材延長部１１ｂは、内輪部材本体１１ａの先端から抜け防止部１４まで延びる軸状部分を備えている。 The outer ring member 13 is formed in a cylindrical shape, and is formed so as to house and surround the inner ring member main body 11a and the inner ring member extension 11b around which the coil spring 12 is wound. The coil spring 12 is locked inside the one end portion of the outer ring member 13. A locking groove for locking both ends of the coil spring 12 is provided on the inner surface side of the outer ring member 13, and both ends of the coil spring 12 are engaged with the locking groove. It is locked to. Further, at the other end of the inner ring member extension portion 11b and the outer ring member 14, a drop prevention portion 14 for preventing the inner ring member extension portion 11b from coming out of the outer ring member 13 is formed, and the inner ring member extension portion 11b is A shaft-shaped portion extending from the tip of the inner ring member main body 11a to the removal preventing portion 14 is provided.

トルクリミッタは、筒状の外輪部材１３に内輪部材延長部１１ｂを挿入し、内輪部材延長部１１ｂの端部が外輪部材１３から突出するように、抜け防止部１４により係止される。そして、コイルばね１２が巻装された内輪部材本体１１ａを外輪部材１３に挿入し、内輪部材延長部１１ｂのＤカットを内輪部材本体１１ａのＤ穴に挿入して内輪部材延長部１１ｂと内輪部材本体１１ａとを機械的に連結する。コイルばね１２は外輪部材の係止溝で係止される。   The torque limiter is locked by the slip-out preventing portion 14 so that the inner ring member extension portion 11 b is inserted into the cylindrical outer ring member 13 and the end portion of the inner ring member extension portion 11 b projects from the outer ring member 13. Then, the inner ring member main body 11a around which the coil spring 12 is wound is inserted into the outer ring member 13, and the D-cut of the inner ring member extension 11b is inserted into the D hole of the inner ring member main body 11a so that the inner ring member extension 11b and the inner ring member are inserted. The main body 11a is mechanically connected. The coil spring 12 is locked by the locking groove of the outer ring member.

このように構成されたトルクリミッタにおいて、外輪部材１３は内輪部材延長部１１ｂに対応して長く形成されているので、外輪部材１３に複数のローラを取り付けることが可能となる。また、内輪部材延長部１１ｂが内輪部材本体１１ａの先端から抜け防止部１４まで延びる軸状部分を有しており、シャフトの役目を果たすので、シャフトを別に用意する必要がない。 In the torque limiter configured as described above, the outer ring member 13 is formed to be long corresponding to the inner ring member extension portion 11b, so that a plurality of rollers can be attached to the outer ring member 13. Further, since the inner ring member extension 11b has a shaft-like portion extending from the tip of the inner ring member main body 11a to the removal preventing portion 14 and plays the role of a shaft, it is not necessary to prepare another shaft.

いま、内輪部材本体１１ａに負荷トルクが加えられたとする。負荷トルクがトルク制限値以下のときは、コイルばね１２と内輪部材本体１１ａの外面との摩擦力により内輪部材本体１１ａと外輪部材１３とが一体となって回転し、外輪部材１３にトルクを伝達する。一方、負荷トルクがトルク制限値を超えたときは内輪部材本体１１ａが空転して外輪部材１３に伝達するトルクを遮断する。逆に、外輪部材１３に負荷トルクが加えられた場合も同様に、負荷トルクがトルク制限値以下のときは内輪部材本体１１ａにトルクを伝達し、負荷トルクがトルク制限値を超えたときは内輪部材本体１１ａに伝達するトルクを遮断する。 Assume that a load torque is applied to the inner ring member main body 11a. When the load torque is equal to or less than the torque limit value, the inner ring member main body 11a and the outer ring member 13 rotate integrally by the frictional force between the coil spring 12 and the outer surface of the inner ring member main body 11a, and the torque is transmitted to the outer ring member 13. To do. On the other hand, when the load torque exceeds the torque limit value, the inner ring member main body 11a idles and the torque transmitted to the outer ring member 13 is cut off. Conversely, when a load torque is applied to the outer ring member 13, similarly, when the load torque is less than or equal to the torque limit value, the torque is transmitted to the inner ring member body 11a , and when the load torque exceeds the torque limit value, the inner ring The torque transmitted to the member main body 11a is cut off.

このように、内輪部材を２分割し、コイルばね１２と摩擦する部分を特殊樹脂材を適用した内輪部材本体１１ａとし、それ以外の部分を安価な一般樹脂材を適用した内輪部材延長部１１ｂとするので、ローコスト化を図ることができる。また、２分割した内輪部材本体１１ａと内輪部材延長部１１ｂとを機械的に連結するとともに内輪部材延長部１１ｂが抜け出さないように抜け防止部１４を設けるので、一つの内輪部材として保持できる。   In this way, the inner ring member is divided into two parts, the part that frictions with the coil spring 12 is an inner ring member main body 11a to which a special resin material is applied, and the other part is an inner ring member extension part 11b to which an inexpensive general resin material is applied. Therefore, the cost can be reduced. Further, since the inner ring member main body 11a and the inner ring member extension portion 11b divided into two parts are mechanically connected and the drop prevention portion 14 is provided so that the inner ring member extension portion 11b does not come out, it can be held as one inner ring member.

以上、本発明の実施形態を説明したが、この実施形態は、例として提示したものであり、発明の範囲を限定することは意図していない。この新規な実施形態は、その他の様々な形態で実施されることが可能であり、発明の要旨を逸脱しない範囲で、種々の省略、置き換え、変更を行うことができる。この実施形態やその変形は、発明の範囲や要旨に含まれるとともに、特許請求の範囲に記載された発明とその均等の範囲に含まれる。   As mentioned above, although embodiment of this invention was described, this embodiment is shown as an example and is not intending limiting the range of invention. The novel embodiment can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. This embodiment and its modifications are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

１１…内輪部材、１１ａ…内輪部材本体、１１ｂ…内輪部材延長部、１２…コイルばね、１３…外輪部材、１４…抜け防止部 DESCRIPTION OF SYMBOLS 11 ... Inner ring member, 11a ... Inner ring member main body, 11b ... Inner ring member extension part, 12 ... Coil spring, 13 ... Outer ring member, 14 ... Detachment prevention part

Claims (1)

特殊樹脂素材で形成された内輪部材本体と、
前記内輪部材本体に巻装されたコイルばねと、
一般樹脂素材で形成され、前記内輪部材本体と一体に回転するように前記内輪部材本体の先端に嵌め合わされた内輪部材延長部と、
前記コイルばねが巻装された内輪部材本体及び前記内輪部材延長部を包囲するように設けられた外輪部材とを備え、
前記外輪部材は、その一方端部には前記コイルばねの両端部が係止されるとともに、他方端部には前記内輪部材延長部を係止する抜け防止部が形成され、
前記内輪部材延長部は、前記内輪部材本体の先端から前記外輪部材の抜け防止部まで延びる軸状部分を有しており、
前記内輪部材本体または前記外輪部材の負荷トルクがトルク制限値以下のときはトルクを伝達し、前記負荷トルクがトルク制限値を超えたときは、前記内輪部材本体と前記コイルばねとの間で空転が生じてトルクの伝達を遮断することを特徴とするトルクリミッタ。 An inner ring member body made of a special resin material;
A coil spring wound around the inner ring member body;
An inner ring member extension formed of a general resin material and fitted to the tip of the inner ring member main body so as to rotate integrally with the inner ring member main body ;
And a outer ring member to which the coil spring is provided so as to surround the wound on inner ring member body and the inner ring member extension,
The outer ring member has one end portion engaged with both end portions of the coil spring, and the other end portion formed with a slip prevention portion for engaging the inner ring member extension portion,
The inner ring member extension has an axial portion extending from the tip of the inner ring member main body to the outer ring member drop prevention part,
The load torque of the inner ring member body or the outer ring member to transmit torque when the following torque limit value, when the load torque exceeds the torque limit value, idle between said inner ring member main body and the coil spring Torque limiter characterized in that torque transmission is interrupted and torque transmission is cut off.
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JPH07259877A (en) * 1994-03-22 1995-10-09 Nippon Seiko Kk Torque limiter
JPH08100825A (en) * 1994-09-30 1996-04-16 Ntn Corp Torque limiter
JPH09158958A (en) * 1995-12-06 1997-06-17 Shinkichi Yajima Torque limiter
JP2006027793A (en) * 2004-07-14 2006-02-02 Fuji Xerox Co Ltd Torque limiter, retard roll, paper feeding device, and image forming device

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CN203214689U (en) * 2013-04-12 2013-09-25 宁波兴茂电子科技有限公司 Torque limiter for generating torque through friction force
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JPH07259877A (en) * 1994-03-22 1995-10-09 Nippon Seiko Kk Torque limiter
JPH08100825A (en) * 1994-09-30 1996-04-16 Ntn Corp Torque limiter
JPH09158958A (en) * 1995-12-06 1997-06-17 Shinkichi Yajima Torque limiter
JP2006027793A (en) * 2004-07-14 2006-02-02 Fuji Xerox Co Ltd Torque limiter, retard roll, paper feeding device, and image forming device

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