JPH0735846U - Gear reverse rotation prevention and safety device - Google Patents
Gear reverse rotation prevention and safety deviceInfo
- Publication number
- JPH0735846U JPH0735846U JP7301493U JP7301493U JPH0735846U JP H0735846 U JPH0735846 U JP H0735846U JP 7301493 U JP7301493 U JP 7301493U JP 7301493 U JP7301493 U JP 7301493U JP H0735846 U JPH0735846 U JP H0735846U
- Authority
- JP
- Japan
- Prior art keywords
- reverse rotation
- gear
- driven gear
- rotation prevention
- drive gear
- 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.)
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- Controlling Sheets Or Webs (AREA)
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Abstract
(57)【要約】
【目的】 常時一定方向の回転を要求される歯車が、何
等かの原因で逆転しようとする時、逆転を阻止すると共
に、過大な逆転力が働いた時、逆転阻止のための部材の
損傷を防止する。
【構成】 適用される機器本体に位置を固定して駆動歯
車を設け、これと噛合う従動歯車と逆転阻止歯車と逆転
防止部材と、逆転阻止歯車の回転軸を嵌挿する長孔とを
回動可能な逆転阻止枠体に設け、かつこの逆転阻止枠体
は機器本体との間に介在する押圧体によって常時押圧さ
れる駆動歯車と従動歯車とが噛合っている。
(57) [Abstract] [Purpose] When a gear that is always required to rotate in a certain direction tries to rotate in the reverse direction for some reason, it prevents the reverse rotation, and when an excessive reverse force acts, it prevents the reverse rotation. To prevent damage to the member. [Structure] A drive gear is provided at a fixed position on the equipment body to be applied, and a driven gear, a reverse rotation preventing gear, a reverse rotation preventing member that meshes with the drive gear, and a long hole into which a rotation shaft of the reverse rotation preventing gear is inserted are rotated. The reverse rotation prevention frame is provided on a movable reverse rotation prevention frame, and a drive gear and a driven gear that are constantly pressed by a pressing body interposed between the reverse rotation prevention frame and the device body mesh with each other.
Description
【０００１】[0001]
この考案はプリンターあるいはタイプライター用のリボンカセット等における リボン移送用の歯車の逆転阻止兼安全装置に関する。 The present invention relates to a reverse rotation preventing and safety device for a ribbon transfer gear in a ribbon cassette or the like for a printer or a typewriter.
【０００２】[0002]
プリンターやタイプライター用のリボンカセット等に用いられる歯車の逆転防 止機構として、正逆転する入力輪と、これに常時噛合って正逆転すると同時に、 前記入力輪の軸芯を中心とする円弧に沿って正方向又は逆方向に移動する従動輪 と、この従動輪が逆方向に移動した時、この従動輪と係合してその逆転を阻止す る制止部材とからなる逆転機構が実開平２−４４０６６号公報によって提案され ている。 As a reverse rotation prevention mechanism for gears used in ribbon cassettes for printers and typewriters, it has an input wheel that rotates in the forward and reverse directions and a forward and reverse rotation that always meshes with the input wheel. A reverse rotation mechanism consisting of a driven wheel that moves in the forward or reverse direction along with a stop member that engages with the driven wheel and prevents the reverse rotation when the driven wheel moves in the reverse direction No. 44066.
【０００３】[0003]
前記の逆転防止機構によれば入力輪が何かの原因で逆転した時、その逆転の防 止は、従動輪が移動して制止部材と係合することによって、従動輪の逆転が阻止 され、従動輪と噛合う入力輪の逆転が阻止されるのであるが、入力輪の逆転の勢 いが、従動輪と制止部材との係合によって入力輪の逆転が阻止される勢いである ならば一応逆転防止の目的を達し得るが、入力輪の逆転の勢いがそれより強い場 合には、従動輪と制止部材との係合によっても入力輪の逆転は阻止されないこと となり、その結果として制止部材か従動輪か、あるいは入力輪の損傷にならざる を得ないこととなることから、この考案は通常の範囲内にある駆動歯車の逆転に 際しては円滑に逆転を阻止しながら、それ以上の逆転力が生じた場合には阻止部 材や従動歯車あるいは駆動歯車等に何等損傷を与えることのない歯車の逆転阻止 兼安全装置を提供することを課題とする。 According to the above-described reverse rotation prevention mechanism, when the input wheel reverses for some reason, the reverse rotation is prevented by the driven wheel moving and engaging with the stop member to prevent the reverse rotation of the driven wheel. The reverse rotation of the input wheel that meshes with the driven wheel is blocked, but if the reverse rotation of the input wheel is such that the reverse rotation of the input wheel is blocked by the engagement of the driven wheel and the stop member, then Although the purpose of preventing reverse rotation can be achieved, if the force of reverse rotation of the input wheel is stronger than that, the reverse rotation of the input wheel will not be prevented even by the engagement of the driven wheel and the stop member, and as a result, the stop member Since this will inevitably result in damage to either the driven wheel or the input wheel, the present invention smoothly prevents the reverse rotation of the drive gear within the normal range, and If a reverse rotation force occurs, the blocking member or driven gear There is an object to provide a reverse rotation prevention and safety gear without providing anything like damage to the drive gear or the like.
【０００４】[0004]
前記した課題を達するため、この考案は駆動歯車２と、これに噛合う従動歯車 ４と、この従動歯車４に噛合い、かつ回転軸８が長孔７に嵌挿されて摺動転位が 可能な逆転阻止歯車５と、この逆転阻止歯車５の摺動転位により、これと係合し て逆転阻止歯車５の逆転を阻止する逆転阻止部材９とからなり、かつ前記駆動歯 車２は機器本体１に位置が固定して設けられ、前記従動歯車４と、逆転阻止歯車 ５と、これの回転軸８を嵌挿する長孔７と、逆転阻止部材９とは、機器本体１内 に回動可能に設けられた逆転阻止枠体６に設けられ、しかも、この逆転阻止枠体 ６は、常時は逆転阻止枠体６の従動歯車４が駆動歯車２と噛合うように、機器本 体１と逆転阻止枠体６との間に介在する押圧体１１により押圧されていることに より、駆動歯車２の正転によって従動歯車４も正転し、この間は逆転阻止歯車５ は逆転阻止部材９との係合を離れて従動歯車４と噛合って回転しており、駆動歯 車２が逆転した時には、これと噛合う従動歯車４も逆転し、この逆転による付勢 によって逆転阻止歯車５が摺動転位して逆転阻止部材９と係合してその回転を阻 止し、それによって従動歯車４とこれに噛合う駆動歯車２の逆転を防止するが、 駆動歯車２の逆転が、逆転阻止歯車５と逆転阻止部材９との係合による従動歯車 ４の逆転の停止によっても阻止されない程度に強い時には、従動歯車４の逆転の 付勢が機器本体１と逆転阻止枠体６との間に介在する押圧体１１の押圧力に抗し て逆転阻止枠体６を回動させて従動歯車４の逆転を防止しながら駆動歯車２の逆 転を許して駆動歯車２、従動歯車４、逆転阻止歯車５、または逆転阻止部材９の いずれの損傷を防止するようにした歯車の逆転阻止兼安全装置としたものである 。 In order to solve the above-mentioned problems, the present invention allows a drive gear 2, a driven gear 4 that meshes with the drive gear 2, and a driven gear 4 that meshes with the driven gear 4 and a rotary shaft 8 that is inserted into the long hole 7 to cause sliding dislocation. A reverse rotation preventing gear 5 and a reverse rotation preventing member 9 which engages with the reverse rotation preventing gear 5 by a sliding dislocation of the reverse rotation preventing gear 5 to prevent the reverse rotation preventing gear 5 from rotating in the reverse direction. 1, the driven gear 4, the reverse rotation preventing gear 5, the elongated hole 7 into which the rotation shaft 8 of the driven gear 4 is fitted, and the reverse rotation preventing member 9 are rotated in the device body 1. The reverse rotation prevention frame body 6 is provided so as to be capable of being connected to the device body 1 such that the driven gear 4 of the reverse rotation prevention frame body 6 always meshes with the drive gear 2. The drive gear is pressed by the pressing body 11 that is interposed between the reverse rotation preventing frame body 6 and The normal rotation of the driven gear 4 also causes normal rotation of the driven gear 4, and during this period, the reverse rotation preventing gear 5 is disengaged from the reverse rotation preventing member 9 and meshes with the driven gear 4 to rotate. The driven gear 4 meshing with this also rotates in the reverse direction, and the reverse rotation prevention gear 5 slides and displaces due to the bias due to this reverse rotation to engage the reverse rotation prevention member 9 and prevent its rotation. The reverse rotation of the drive gear 2 meshing with this is prevented, but when the reverse rotation of the drive gear 2 is strong enough not to be blocked even by the stop of the reverse rotation of the driven gear 4 due to the engagement of the reverse rotation blocking gear 5 and the reverse rotation blocking member 9. The reverse rotation bias of the driven gear 4 rotates the reverse rotation prevention frame body 6 against the pressing force of the pressing body 11 interposed between the device body 1 and the reverse rotation prevention frame body 6 to rotate the driven gear 4 reversely. The drive gear 2 and the driven gear 2 are driven while allowing the reverse rotation of the drive gear 2. Car 4 is obtained by the reverse rotation prevention and safety device gear so as to prevent any damage to the reverse rotation prevention gear 5 or reverse rotation prevention member 9.
【０００５】 この考案にあっては逆転阻止枠体６に制御片１２を設けることによって従動歯 車４の駆動歯車２に対する噛合せを常時行わせると共に制御片１２と機器本体１ との調整によって押圧体１１の押圧力、ひいては従動歯車４の駆動歯車２に対す る噛合せ力の調節を計れる。In this invention, the reverse rotation preventing frame body 6 is provided with the control piece 12 so that the driven gear 4 is constantly engaged with the drive gear 2 and is pressed by adjusting the control piece 12 and the device body 1. The pressing force of the body 11 and thus the meshing force of the driven gear 4 with respect to the drive gear 2 can be adjusted.
【０００６】[0006]
駆動歯車が正転していると、従動歯車を有する逆転阻止枠体は押圧体の押圧力 により駆動歯車側に押圧され、駆動歯車と従動歯車とは噛合い正転を継続して所 望の動作を果たしている。 この間逆転阻止歯車は逆転阻止部材との係合から外れて、従動歯車に噛合って 回転を継続する。 When the drive gear rotates in the forward direction, the reverse rotation prevention frame body with the driven gear is pressed toward the drive gear by the pressing force of the pressing body, and the drive gear and the driven gear mesh with each other to continue forward rotation, which is desired. Playing action. During this time, the reverse rotation prevention gear disengages from the reverse rotation prevention member and meshes with the driven gear to continue rotation.
【０００７】 駆動歯車が逆転すると、従動歯車も逆転し、この従動歯車の逆転による付勢に よって逆転阻止歯車が摺動転位して逆転阻止部材と係合して逆転阻止歯車の回転 を阻止しこの結果、逆転阻止歯車と噛合う従動歯車を、またこれと噛合う駆動歯 車の逆転を阻止する。この間駆動歯車と従動歯車とは噛合ったまゝの状態にある 。When the drive gear rotates in the reverse direction, the driven gear also rotates in the reverse direction, and the reverse rotation prevention force of the driven gear causes the reverse rotation prevention gear to slide and displace to engage with the reverse rotation prevention member to prevent the rotation of the reverse rotation prevention gear. As a result, reverse rotation of the driven gear that meshes with the reverse rotation prevention gear and the drive gear that meshes with the driven gear are prevented. During this time, the driving gear and the driven gear are in a state of being in mesh with each other.
【０００８】 駆動歯車の逆転が、逆転阻止歯車と逆転阻止部材との係合によっても停止しな い時には、駆動歯車の逆転力が従動歯車に伝わるが、従動歯車はこれと噛合う逆 転阻止歯車が逆転阻止部材と係合して逆転阻止歯車の回転を許さないことから、 駆動歯車の逆転による従動歯車に対する付勢は従動歯車を有する逆転阻止枠体を 回動させて、これにより、従動歯車を駆動歯車から離れる方向に転位させて、両 歯車の噛合せを空転させ、両歯車をはじめ、逆転阻止歯車や逆転阻止部材の損傷 を防止し安全を維持する。 なお、逆転の原因が従動歯車にあっても同様である。When the reverse rotation of the drive gear does not stop even by the engagement of the reverse rotation prevention gear and the reverse rotation prevention member, the reverse rotation force of the drive gear is transmitted to the driven gear, but the driven gear meshes with the reverse rotation prevention. Since the gear engages with the reverse rotation prevention member and does not allow the rotation of the reverse rotation prevention gear, the bias of the drive gear against the driven gear causes the reverse rotation prevention frame body having the driven gear to rotate, whereby the driven gear is driven. By shifting the gears away from the drive gears, the meshing of both gears idles to prevent damage to both gears, the reverse rotation prevention gear and the reverse rotation prevention member, and maintain safety. The same applies when the cause of the reverse rotation is the driven gear.
【０００９】 また逆転阻止枠体６に設けられた制御片１２は、押圧体１１の過度な押圧力を 逆転阻止枠体６に与えることを阻止し、従動歯車４と駆動歯車２との噛合せ力を 調節する。The control piece 12 provided on the reverse rotation preventive frame body 6 prevents the excessive pressing force of the pressing body 11 from being applied to the reverse rotation preventive frame body 6, so that the driven gear 4 and the drive gear 2 mesh with each other. Adjust the force.
【００１０】[0010]
図１はこの考案に係る歯車の逆転阻止兼安全装置をリボンカセットに適用した 実施の一例を示し、説明の便宜上カセットの蓋を取除いて示した平面図であって 、１は機器本体であるリボンカセットであり、２はこの機器本体１に位置を固定 されて回転する駆動歯車であり３は駆動歯車２の駆動軸である。 ４は駆動歯車３と噛合う従動歯車であり、５は従動歯車４と噛合う逆転阻止歯 車である。従動歯車４は、機器本体１とは別体である逆転阻止枠体６に、その位 置が固定して設けられるが、逆転阻止歯車５は、従動歯車４と噛合う位置で、逆 転阻止枠体６に設けられた長孔７にその回転軸８が嵌挿されて設けられる。 ９は逆転阻止枠体６に設けられた逆転阻止部材であって、逆転阻止歯車５が摺 動転位して係合する位置に設けられる。 このように従動歯車４、逆転阻止歯車５、と逆転阻止部材９を有する逆転阻止 枠体６は、機器本体１に設けられた支軸１０に、回動可能に嵌挿されており、ま た逆転阻止枠体６と機器本体１との間には例えば弾条である押圧体１１が介在し て、この押圧体１１の押圧力によって逆転阻止枠体６を駆動歯車１の方向に押圧 し、駆動歯車１と従動歯車４とを噛合せている。 なお、１２は押圧体１１の過度な押圧力を制御するため逆転阻止枠体６に設け られた制御片であって、この制御片１２が機器本体１に衝突してこれ以上の逆転 阻止枠体６の過度な駆動歯車１の方向に対する押圧体１１の押圧力を制御してお り、１３はインクリボンである。 FIG. 1 is a plan view showing an embodiment in which a reverse rotation prevention and safety device for gears according to the present invention is applied to a ribbon cassette, and a lid of the cassette is removed for convenience of description. A ribbon cassette, 2 is a drive gear whose position is fixed to the device body 1 and rotates, and 3 is a drive shaft of the drive gear 2. Reference numeral 4 is a driven gear that meshes with the drive gear 3, and 5 is a reverse rotation prevention gear that meshes with the driven gear 4. The driven gear 4 is provided in a fixed position on a reverse rotation prevention frame body 6 which is a separate body from the device body 1. However, the reverse rotation prevention gear 5 is a position that meshes with the driven gear 4 and prevents reverse rotation. The rotary shaft 8 is fitted and provided in the long hole 7 provided in the frame body 6. Reference numeral 9 denotes a reverse rotation preventing member provided on the reverse rotation preventing frame body 6, and is provided at a position where the reverse rotation preventing gear 5 is slidably displaced and engaged. The reverse rotation preventing frame body 6 having the driven gear 4, the reverse rotation preventing gear 5, and the reverse rotation preventing member 9 is rotatably fitted on the support shaft 10 provided in the device body 1. A pressing body 11 which is, for example, a strip is interposed between the reverse rotation preventing frame body 6 and the device body 1, and the pressing force of the pressing body 11 presses the reverse rotation preventing frame body 6 toward the drive gear 1. The drive gear 1 and the driven gear 4 mesh with each other. Reference numeral 12 denotes a control piece provided on the reverse rotation prevention frame body 6 for controlling an excessive pressing force of the pressing body 11. The control piece 12 collides with the device body 1 and further reverse rotation prevention frame body is provided. The pressing force of the pressing body 11 in the direction of the excessive driving gear 1 of 6 is controlled, and 13 is an ink ribbon.
【００１１】 今、従動歯車２が実線の矢印で示す方向に回転する時、この回転を正転とする が、この正転によって押圧体１１によって押圧されている逆転阻止枠体６に設け られた従動歯車４は、駆動歯車２と噛合い、これによって実線の矢印で示す方向 に回転、すなわち正転する。 この従動歯車４に噛合う逆転阻止歯車５は、従動歯車４の正転による付勢によ って逆転阻止歯車５は逆転阻止部材９との係合を離れて、従動歯車４と噛合い回 転を継続する。 この間インクリボン１３は駆動歯車２と従動歯車４との噛合によって移送循環 される。Now, when the driven gear 2 rotates in the direction indicated by the solid arrow, this rotation is forward rotation, and it is provided on the reverse rotation prevention frame body 6 pressed by the pressing body 11 by this normal rotation. The driven gear 4 meshes with the drive gear 2, and thereby rotates in the direction indicated by the solid arrow, that is, rotates normally. The reverse rotation preventive gear 5 meshing with the driven gear 4 is disengaged from the reverse rotation preventive member 9 by the biasing force of the driven gear 4 due to the normal rotation, and meshes with the driven gear 4. Continue to roll. During this time, the ink ribbon 13 is transferred and circulated by the meshing of the drive gear 2 and the driven gear 4.
【００１２】 今、駆動歯車２と従動歯車４とが正転している時、駆動歯車２が何等かの原因 で図において点線の矢印で示すように逆転した時、これと噛合う従動歯車４も点 線の矢印で示すように逆転するが、この従動歯車４の逆転による付勢によって、 従動歯車４と噛合っている逆転阻止歯車５はその回転軸８が長孔７中を点線の矢 印で示すように摺動転位し、それによって逆転阻止歯車５と逆転阻止部材９とが 係合して逆転阻止歯車５の回転が阻止され、それにより、これと噛合う従動歯車 ４の回転も阻止され、駆動歯車２の回転も阻止されることになる。 この逆転による駆動歯車２の回転の阻止は、逆転の原因が従動歯車４にあった としても同様である。Now, when the drive gear 2 and the driven gear 4 are rotating in the normal direction, when the drive gear 2 is rotated in the reverse direction as shown by the dotted arrow in the figure for some reason, the driven gear 4 meshes with this. The reverse rotation prevention gear 5 meshed with the driven gear 4 has its rotation shaft 8 in the long hole 7 by the dotted arrow. As shown by the mark, sliding displacement occurs, whereby the reverse rotation preventing gear 5 and the reverse rotation preventing member 9 are engaged with each other to prevent the rotation of the reverse rotation preventing gear 5 and thereby the rotation of the driven gear 4 meshing therewith. The rotation of the drive gear 2 is also blocked. The prevention of the rotation of the drive gear 2 due to this reverse rotation is the same even if the cause of the reverse rotation is the driven gear 4.
【００１３】 通常の場合の駆動歯車あるいは従動歯車の逆転は、上記のようにして阻止され るが、駆動歯車の逆転が逆転阻止歯車と逆転阻止部材との係合によっても停止し ない時には、駆動歯車の逆転力が従動歯車に伝わり続けており、これと噛合う逆 転阻止歯車を回転させるようにしている。 一方すでに逆転阻止歯車は逆転阻止部材と係合しているので逆転阻止歯車は従 動歯車の逆転の付勢によっても回転することができず、この従動歯車の逆転の付 勢は、逆転阻止枠体が、機器本体１の支軸に嵌挿されて、この支軸を支点として 回動可能とされていることから、押圧体１１の押圧力に抗して支軸を支点として 逆転阻止枠体が回動し、これによって従動歯車はその回転が停止したまゝ、駆動 歯車から離れる方向に転位して両歯車の噛合せが空転されるので両歯車をはじめ として逆転阻止歯車や逆転阻止部材の損傷が防止される。Reverse rotation of the drive gear or driven gear in the normal case is prevented as described above, but when the reverse rotation of the drive gear is not stopped by the engagement of the reverse rotation prevention gear and the reverse rotation prevention member, the drive gear is not driven. The reverse rotation force of the gear continues to be transmitted to the driven gear, and the reverse rotation prevention gear that meshes with this is rotated. On the other hand, since the reverse rotation prevention gear is already engaged with the reverse rotation prevention member, the reverse rotation prevention gear cannot rotate due to the reverse rotation bias of the driven gear. Since the body is inserted into the support shaft of the device body 1 and is rotatable about the support shaft as a fulcrum, the reverse rotation prevention frame body is supported against the pressing force of the pressing body 11 with the support shaft as a fulcrum. When the driven gear stops rotating, the driven gear shifts away from the drive gear and the meshing of both gears idles. Damage is prevented.
【００１４】[0014]
この考案になる歯車の逆転阻止兼安全装置は以上に詳細に説明したように逆転 防止のための従動歯車、逆転阻止歯車、逆転防止部材、および逆転阻止歯車の回 転軸を嵌挿する長孔を、機器本体に回動可能な逆転阻止枠体に設け、この逆転阻 止枠体は、機器本体との間に介在された押圧体によって押圧されて従動歯車と駆 動歯車とが常時噛合うようにされているので、駆動歯車が何等かの原因で逆転し た時は、従来の逆転防止機構と同様、逆転阻止歯車と逆転阻止部材との係合によ って従動歯車、それと噛合う駆動歯車の逆転を阻止するが、この考案にあっては 、駆動歯車の逆転する勢いが、前記した逆転阻止歯車と逆転阻止部材との係合に よっても阻止できない程に大きい時には、逆転阻止枠体が回動して、従動歯車と 駆動歯車との噛合せを離す方向に転位して、両歯車の噛合せを空転させて、両歯 車をはじめとして逆転阻止歯車や逆転阻止部材等の損傷を防止し得たもので、こ の点、従来の逆転防止機構では、入力輪が逆転した時、制止部材に従動輪が移動 して係合し、従動輪の逆転を阻止し、これによって入力輪の逆転を防止するだけ で、もし従動輪と制止部材との係合によっても入力輪の逆転が阻止できない程の 逆転力が大きい時には入力輪、従動輪あるいは制止部材のいずれかゞ損傷される ものとなるが、この考案はそのようなことが生じる危険を回避し得るものである 。 また逆転阻止枠体に設けられた制御片は押圧体が過度な押圧力を逆転阻止枠体 に与えることを阻止して従動歯車と駆動歯車との噛合せ力を調節することができ る。 As described in detail above, the gear reverse rotation prevention / safety device according to the present invention is a long hole into which the driven gear for preventing reverse rotation, the reverse rotation prevention gear, the reverse rotation prevention member, and the rotation shaft of the reverse rotation prevention gear are inserted. Is provided in a rotatable reverse rotation prevention frame body on the equipment body, and the reverse rotation prevention frame body is pressed by a pressing body interposed between the equipment body and the driven gear and the drive gear are always meshed with each other. Therefore, when the drive gear reverses for some reason, it engages with the driven gear by the engagement of the reverse rotation prevention gear and the reverse rotation prevention member as in the conventional reverse rotation prevention mechanism. The reverse rotation of the drive gear is prevented. In this invention, however, when the reverse rotation momentum of the drive gear is too large to be blocked by the engagement of the reverse rotation prevention gear and the reverse rotation prevention member, the reverse rotation prevention frame is provided. The body rotates to engage the driven gear with the drive gear. It is possible to prevent damage to both the gears and the reverse rotation prevention gear, reverse rotation prevention member, etc. by shifting the gears in the direction of separating the gears so that the meshing of both gears idles. In the prevention mechanism, when the input wheel reverses, the driven wheel moves and engages, blocking the reverse rotation of the driven wheel, and thus preventing the reverse rotation of the input wheel. When the reverse force of the input wheel is too large to prevent the reverse rotation of the input wheel even by the engagement with the input wheel, any of the input wheel, the driven wheel or the stopping member will be damaged. Can be avoided. Further, the control piece provided on the reverse rotation prevention frame body can prevent the pressing body from applying an excessive pressing force to the reverse rotation prevention frame body and can adjust the meshing force between the driven gear and the drive gear.
【図１】この考案に係る歯車の逆転阻止兼安全装置をリ
ボンカセットに適用した実施の一例を示す平面図。FIG. 1 is a plan view showing an example in which a reverse rotation preventing and safety device for gears according to the present invention is applied to a ribbon cassette.
１ 機器本体 ２ 駆動歯車 ３ 駆動軸 ４ 従動歯車 ５ 逆転阻止歯車 ６ 逆転阻止枠体 ７ 長孔 ８ 回転軸 ９ 逆転阻止部材 １０ 支軸 １１ 押圧体 １２ 制御片 １３ インクリボン 1 Device Main Body 2 Drive Gear 3 Drive Shaft 4 Driven Gear 5 Reverse Rotation Blocking Gear 6 Reverse Rotation Blocking Frame 7 Slot 8 Rotating Shaft 9 Reverse Rotation Blocking Member 10 Spindle 11 Pressing Body 12 Control Piece 13 Ink Ribbon
フロントページの続き (72)考案者 大貫 和男 埼玉県狭山市上奥富1140 ダイニック株式 会社東京工場内 (72)考案者 坂井 忠之 東京都千代田区一ツ橋２−５−５ ダイニ ック株式会社東京本社営業所内 (72)考案者 山田 武生 東京都千代田区一ツ橋２−５−５ ダイニ ック株式会社東京本社営業所内Front page continued (72) Inventor Kazuo Onuki 1140 Kamiotomi, Sayama City, Saitama Prefecture, inside the Tokyo factory of Dynic Co., Ltd. (72) Inventor Tadayuki Sakai 2-5-5 Hitotsubashi, Chiyoda-ku, Tokyo Inside the Tokyo Head Office Sales Office (72) Inventor Takeo Yamada 2-5-5 Hitotsubashi, Chiyoda-ku, Tokyo Dinick Co., Ltd. Tokyo Head Office Sales Office
Claims (2)
車（４）と、この従動歯車（４）に噛合い、かつ回転軸
（８）が長孔（７）に嵌挿されて摺動転位が可能な逆転
阻止歯車（５）と、この逆転阻止歯車（５）の摺動転位
により、これと係合して逆転阻止歯車（５）の逆転を阻
止する逆転阻止部材（９）とからなり、かつ前記駆動歯
車（２）は機器本体（１）に位置が固定して設けられ、
前記従動歯車（４）と、逆転阻止歯車（５）と、これの
回転軸（８）を嵌挿する長孔（７）と、逆転阻止部材
（９）とは、機器本体（１）内に回動可能に設けられた
逆転阻止枠体（６）に設けられ、しかも、この逆転阻止
枠体（６）は、常時は逆転阻止枠体（６）の従動歯車
（４）が駆動歯車（２）と噛合うように、機器本体
（１）と逆転阻止枠体（６）との間に介在する押圧体
（１１）により押圧されていることにより、駆動歯車
（２）の正転によって従動歯車（４）も正転し、この間
は、逆転阻止歯車（５）は逆転阻止部材（９）との係合
を離れて従動歯車（４）と噛合って回転しており、駆動
歯車（２）が逆転した時には、これと噛合う従動歯車
（４）も逆転し、この逆転による付勢によって逆転阻止
歯車（５）が摺動転位して逆転阻止部材（９）と係合し
て、その回転を阻止し、それによって従動歯車（４）と
これに噛合う駆動歯車（２）の逆転を防止するが、駆動
歯車（２）の逆転が、逆転阻止歯車（５）と逆転阻止部
材（９）との係合による従動歯車（４）の逆転の停止に
よっても阻止されない程度に強い時には、従動歯車
（４）の逆転の付勢が機器本体（１）と逆転阻止枠体
（６）との間に介在する押圧体（１１）の押圧力に抗し
て逆転阻止枠体（６）を回動させて、従動歯車（４）の
逆転を防止しながら、駆動歯車（２）の逆転を許して、
駆動歯車（２）、従動歯車（４）、逆転阻止歯車（５）
または逆転阻止部材（９）のいずれかの損傷を防止する
ようにしたことを特徴とする歯車の逆転阻止兼安全装
置。1. A drive gear (2), a driven gear (4) which meshes with the drive gear, and a driven gear (4) which meshes with the rotary shaft (8) in a slot (7). A reverse rotation prevention gear (5) capable of sliding displacement and a reverse rotation prevention member (9) which engages with the reverse rotation prevention gear (5) by the sliding displacement to prevent reverse rotation of the reverse rotation prevention gear (5). And the drive gear (2) is fixedly provided on the device body (1),
The driven gear (4), the reverse rotation prevention gear (5), the long hole (7) into which the rotation shaft (8) of the driven gear (4) is inserted, and the reverse rotation prevention member (9) are provided in the device body (1). The reverse rotation prevention frame body (6) is provided rotatably, and the reverse rotation prevention frame body (6) is normally driven by a driven gear (4) of the reverse rotation prevention frame body (6). ) Is pressed by a pressing body (11) interposed between the device main body (1) and the reverse rotation preventing frame body (6) so as to mesh with the driven gear by the forward rotation of the drive gear (2). (4) also rotates in the normal direction, during which the reverse rotation prevention gear (5) is disengaged from the reverse rotation prevention member (9) and rotates in mesh with the driven gear (4), and the drive gear (2) When the reverse rotation occurs, the driven gear (4) meshing with the reverse rotation also reverses, and the reverse rotation prevention gear (5) slides and displaces reverse rotation due to the bias due to this reverse rotation. It engages with the member (9) to prevent its rotation, thereby preventing the reverse rotation of the driven gear (4) and the drive gear (2) meshing with it, but the reverse rotation of the drive gear (2) reverses. When the driven gear (4) is strong enough not to be blocked even by stopping the reverse rotation of the driven gear (4) due to the engagement of the blocking gear (5) and the reverse rotation blocking member (9), the reverse rotation bias of the driven gear (4) is applied to the device body (1). ) And the reverse rotation prevention frame body (6), the reverse rotation prevention frame body (6) is rotated against the pressing force of the pressing body (11), and the reverse rotation of the driven gear (4) is prevented. While allowing the reverse rotation of the drive gear (2),
Drive gear (2), driven gear (4), reverse rotation prevention gear (5)
Alternatively, a reverse rotation preventing and safety device for gears, characterized in that any one of the reverse rotation preventing members (9) is prevented from being damaged.
を設けてなることを特徴とする請求項１記載の歯車の逆
転阻止兼安全装置。2. A control piece (12) on the reverse rotation prevention frame (6).
The gear reverse rotation preventing / safety device according to claim 1, further comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7301493U JPH0735846U (en) | 1993-12-09 | 1993-12-09 | Gear reverse rotation prevention and safety device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7301493U JPH0735846U (en) | 1993-12-09 | 1993-12-09 | Gear reverse rotation prevention and safety device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0735846U true JPH0735846U (en) | 1995-07-04 |
Family
ID=13506064
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7301493U Pending JPH0735846U (en) | 1993-12-09 | 1993-12-09 | Gear reverse rotation prevention and safety device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0735846U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005071285A1 (en) * | 2004-01-23 | 2005-08-04 | Kawasaki Jukogyo Kabushiki Kaisha | Gear mechanism and robot with the mechanism |
| JP2014185695A (en) * | 2013-03-22 | 2014-10-02 | Yasuaki Takekoshi | Rotation acceleration device |
-
1993
- 1993-12-09 JP JP7301493U patent/JPH0735846U/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005071285A1 (en) * | 2004-01-23 | 2005-08-04 | Kawasaki Jukogyo Kabushiki Kaisha | Gear mechanism and robot with the mechanism |
| JP2014185695A (en) * | 2013-03-22 | 2014-10-02 | Yasuaki Takekoshi | Rotation acceleration device |
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