JP4050389B2 - Moving member fixing device - Google Patents

Moving member fixing device Download PDF

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Publication number
JP4050389B2
JP4050389B2 JP16724798A JP16724798A JP4050389B2 JP 4050389 B2 JP4050389 B2 JP 4050389B2 JP 16724798 A JP16724798 A JP 16724798A JP 16724798 A JP16724798 A JP 16724798A JP 4050389 B2 JP4050389 B2 JP 4050389B2
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cam
urging
sided printing
fixing device
moving member
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JP16724798A
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JP2000000958A (en
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京太郎 小沼
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Komori Corp
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Komori Corp
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Description

【0001】
【発明の属する技術分野】
本発明は、例えば片面刷と両面刷とに共用可能な反転機構付枚葉輪転印刷機における移動式カムの固定装置に適用して好適な移動部材固定装置に関する。
【0002】
【従来の技術】
図5は実開平7−28635号公報に開示された従来の移動部材固定装置を適用した反転機構付枚葉輪転印刷機における片面刷と両面刷との切替装置を示す断面図である。同図において、52は固定歯車であって、フレーム51に回転自在に軸支された反転胴(図示せず)の端軸50に固定され、この固定歯車52の円周部には小径部52aが形成されているとともに、側面部を貫通する段付き貫通孔52bが穿設されている。53は固定歯車52の小径部52bに軸承された回転歯車であって、段付き貫通孔52bに対応して凹部53aが形成されている。54は一端側にフランジ部54aと頭部54bが形成され、段付き貫通孔52bに嵌挿された段付きボルトである。55は段付きボルト54に嵌装され、ナット56を螺合させることにより回転歯車53の凹部53aに当接する係合子、57は段付き貫通孔52bと段付きボルト54のフランジ部54a間に介装された皿ばねである。この皿ばね57の付勢力によって段付きボルト54は図中矢印G方向に移動習性が付与され、係合子55によって固定歯車53が固定歯車52に固定され一体的に回転するように構成されている。
【0003】
60はカムレバーであって、基端部が固定歯車52に固定された軸受58に軸59を介して回動自在に支持され、段付きボルト54の頭部54bに当接するカム部60aが形成されている。61は固定歯車52に固定されたガイドであって、カムレバー60を案内するスリットが形成され、カムレバー60を矢印I方向と反対方向に付勢する圧縮スプリング62が嵌装されている。64は押圧部材であって、前記カムレバー60に係合する鍔部64aが形成され、カバー63に嵌着されたブッシュ65によって摺動自在に支持されている。66はレバーであって、軸68を介してカバー63に固定された軸受67に揺動自在に支持され、一端は押圧部材64に連結されている。このレバー66の他端は、フレーム51に立設するようにして固定されたエアシリンダ70のロッド71にピン69を介して枢着されている。
【0004】
このような構成において、片面刷から両面刷に切り替える場合には、エアシリンダ70を作動させ、ロッド71をH方向に進出させると、レバー66が軸68を回動中心として回動し、押圧部材64が矢印I方向に移動し、鍔部64aがカムレバー60を押圧し、カムレバー60が軸59を回動中心としてJ方向に回動する。カムレバー60のJ方向の回動により段付きボルト54の頭部54bにはカム部60aの大径部が圧接し、段付きボルト54を皿ばね57の付勢力に抗して矢印Gと反対方向に移動させるので、係合子55の凹部53aへの押圧力が開放され、回転歯車53は固定歯車52との一体化が解かれる。このような状態で、回転歯車53を図示していないモータ等の駆動手段によって、固定歯車53との位相が両面刷に対応するように回転させる。
【0005】
【発明が解決しようとする課題】
しかしながら、上述した従来の移動部材固定装置においては、軸59を回動中心として回動するカムレバー60と、このカムレバー60に復帰習性を付与する圧縮スプリング62とが、図6に示すように、圧縮スプリング62の軸線方向に対して角度αの傾きをもって当接する構造になっている。したがって、圧縮スプリング62の上端の角部62aに当接したカムレバー60の押圧力によって、圧縮スプリング62は矢印K方向に傾いた状態で圧縮されるので、圧縮スプリング62の一側部62A側に大きな荷重がかかる。これが繰り返し荷重であるため、一側部62A側が金属疲労により、圧縮スプリング62の耐久性が低下するといった問題があった。
【0006】
本発明は上記した従来の問題に鑑みなされたものであり、その目的とするところは、揺動部材を付勢する付勢手段の耐久性を向上させた移動部材固定装置を提供することにある。
【0007】
【課題を解決するための手段】
この目的を達成するために、本発明に係る移動部材固定装置は、揺動自在に支持した揺動部材の一端を付勢手段によって付勢することによって揺動部材の他端側で移動部材を固定部材に押圧して固定するとともに、駆動手段によって前記付勢手段に抗して揺動部材を揺動させることにより移動部材の固定部材に対する固定を解除する移動部材固定装置であって、前記揺動部材と前記付勢手段とが係合する部位を、それぞれ先細り状および凹状に形成するとともに、付勢手段を付勢方向と略直交する方向に移動自在に支持し、前記揺動部材と前記付勢手段との係合によって前記揺動部材の揺動にともない前記付勢手段がこの付勢手段の付勢方向と略直交する方向に移動するものである。
したがって、揺動部材が付勢手段に傾斜した状態で当接しても、揺動部材と付勢手段との係合部が滑動し、付勢手段が付勢方向と略直交する方向に移動するので、付勢手段が付勢方向に対して傾かない。
【0008】
【発明の実施の形態】
以下、本発明の実施の形態を図に基づいて説明する。図1は本発明に係る移動部材固定装置を適用した反転機構付枚葉輪転印刷機における片面刷と両面刷との切替装置を示す断面図、図2は図1におけるII矢視図、図3は図2におけるIII-III 線断面図、図4は動作を説明するための模式図であって、(a)は拡大した図、(b)は全体の動作を示す概要図である。
図1において、符号2で示すものは、印刷ユニットの左右一対のフレーム(一方は図示せず)であって、これら左右のフレーム2には軸受ブッシュ3が嵌着されている。この軸受ブッシュ3には、蓋体4によって軸方向への移動が規制されたテーパローラベアリング5が係入されており、圧胴6はこのテーパローラベアリング5にその端軸が軸支されている。
【0009】
圧胴6は、その端軸のねじ部に螺合されたナット7と自らの段部とによって軸方向への移動が規制されており、図示しない軸の端部に固定されたギアを介して原動側から駆動されるように構成されている。圧胴6の外周部をその円周方向において2等分する箇所には、断面三角形状の切欠き(図示せず)が設けられており、その両端部はベアラ11によって閉塞されている。両方の切欠き内には、それぞれ爪軸10が、ベアラ11に嵌着された軸受ブッシュ12内のベアリング(図示せず)によって回動自在に軸支されており、カラー13によって軸線方向への移動が規制されている。それぞれの爪軸10には、紙をくわえる従来から広く知られている爪(図示せず)が並設されており、爪軸10の両端部には、レバー14が固定され、その遊端部には広幅のカムフォロア15がピンによって枢着されている。
【0010】
左右のフレーム2の内面には、圧胴6と同心円上に設けられた環状のカム台16がボルトによって固定されている。このカム台16には、環状の片面刷用カム17がその外周カム面をカムフォロア15に対接されるようにして軸承され、ボルトによってカム台16に固定されている。カム台16の外周面には、環状の調整ギア18が軸承されており、この調整ギア18には、環状の両面刷用カム19がその外周カム面をカムフォロア15に対接されるようにして軸承され、ボルトによって調整ギア18に固定されている。
【0011】
20は調整ギア18に噛合する中間ギアであって、フレーム2とフレーム2に固定されたブラケット22との間に回動自在に支持された軸21の一端に固着されている。軸21のブラケット22から突出した他端には、かさ歯車23が軸着され、このかさ歯車23には、調整軸25の一端に固着されたかさ歯車24が噛合している。したがって、調整軸25を回動させると、かさ歯車24,23、軸21、中間歯車20を介して調整歯車18が回動し、これと一体の両面刷用カム19と、フレームに固定された片面刷用カム17との位相が調整され、片面刷と両面刷との切替えが行われる。
以上説明した反転機構は、従来から広く使用されている反転機構付枚葉輪転印刷機における片面刷と両面刷との切替装置と格別変わるところはない。
【0012】
次に、本発明の特徴である移動式カムの固定装置について、図1ないし図3に基づいて説明する。
フレーム2の外側に設けられた移動式カムの固定装置26は、駆動手段として機能するエアシリンダ27、揺動自在に支持された揺動部材28、付勢手段として機能する皿ばね29、揺動部材28の一端部側に螺合した六角穴付きの調整ねじ30、揺動部材28の他端部に係合した押圧部材31から概ね構成されている。
【0013】
エアシリンダ27のロッド27aには、レバー32の一端が固定され、このレバー32の他端には、ピン32aを介してレバー33の一端が枢着されている。フレーム2の外面には凹部34が形成され、この凹部34の底部には、固定台35がボルトによって固定され、この固定台35の上部は二股状に形成された一対の対向する支持部35a,35aが突設されている。これら支持部35a,35a間に係入された上述したレバー33の他端部は、ピン36を介して支持部35a,35aに回動自在に支持されており、レバー33の他端には、図3に示すように、カム部33aが突設されている。
【0014】
揺動部材28は、その一端28aがレバー33のカム部33aに係合するように、凹部34の両側部に横架されたピン38を介して揺動自在に支持されており、他端28bが二股状に形成され、一端28a側にねじ部28cが形成されている。図3に示すように、調整ねじ30の先端部は半球状の係合部30aが形成され、揺動部材28のねじ部28cにねじ込まれて係合部30aが突出している。
【0015】
40は略円柱状に形成された押圧子であって、一端側にフランジ部40aが形成され、このフランジ部40aの表面の中央部には、円錐状の凹部40bが形成されており、他端には円環状のストッパ41が固定されている。フレーム2の凹部34の調整ねじ30に対応した底部には、小径の凹部34aが形成され、この凹部34aの径は上述したストッパ41の外径よりも2Δだけ大きく形成されている。押圧子40には、円環状のばね受部材42が遊挿され、このばね受部材42の外径は凹部34aの内径よりも大きく形成されており、このばね受部材42とフランジ部40aとの間には皿ばね29が弾装されている。
【0016】
ばね受部材42は凹部34aの端縁に係合している。したがって、図3および図4に示すように、押圧子40は皿ばね29の付勢力によって矢印A方向に押圧され、凹部40bが調整ねじ30の係合部30aに係合し、揺動部材28がピン38を回動中心として反時計方向に回動するように付勢されている。この状態において、押圧子40の下端部は凹部34a内に臨み、ストッパ41と凹部34aとの間には隙間Δが形成され、押圧子40は隙間Δの範囲内において、皿ばね29の付勢方向と直交する方向である矢印C−D方向に移動自在となっている。
【0017】
フレーム2の凹部34の底部の調整ギア18に対応した部位には挿通孔34bが穿設され、この挿通孔34bに嵌着されたブッシュ44には、略円柱状の押圧部材31が矢印A−B方向に摺動自在に支持されている。押圧部材31の上端部31aは断面が略Hカット状に形成され、この上端部31aが、図2に示すように、上述した揺動部材28の二股状に形成された一対の他端28b内に係入されているとともに、押圧部材31の側面に植設されたピン45が他端28bの下端に係合している。
【0018】
次に、このような構成の反転機構付枚葉輪転印刷機において片面刷から両面刷に切り替える動作を説明する。
エアシリンダ27を動作させて、ロッド27aを後退させることにより、図1において二点鎖線で示すように、レバー32を介してレバー33がピン36を回動中心として図中反時計方向に回動する。図3に示すように、レバー33のカム部33aが揺動部材28の一端28aを押圧するので、揺動部材28は皿ばね29の付勢力に抗してピン38を回動中心として時計方向に回動する。すなわち、図4(a)、(b)に示すように、揺動部材28がピン38を回動中心として時計方向に回動しながら、調整ねじ30の係合部30aが押圧子40の凹部40bを矢印B方向に押圧する。
【0019】
このとき、係合部30aが半球状に形成されているとともに、凹部40bが円錐状に形成され、かつ押圧子40が皿ばね29の付勢方向と直交する方向、すなわち矢印C−D方向に移動自在に支持されているので、係合部30aは凹部40bの表面を円滑に滑動しながら、押圧子40を矢印B方向に移動させるとともに、矢印C方向に距離δだけ移動させる。したがって、押圧子40は、その軸線方向が皿ばね29の付勢方向である矢印A−Bと一致した状態を保持するので、皿ばね29も傾斜するように圧縮されることがない。このため、皿ばね29の一側部に大きな荷重がかかるようなことがないので、皿ばね29の耐久性に影響を及ぼすようなことがない。
【0020】
また、係合部30aが凹部40bに対して2点E,Fにおいて係合するので、押圧子40を矢印B方向に押圧するときに、押圧子40を矢印C−D方向に揺動させることなく、安定した状態で押圧することができる。また、皿ばね29を直接フレーム2の凹部34aの端縁に当接させずに、ばね受部材42を介して行ったので、凹部34aの端縁との間に発生する摩擦力が小さくなり、押圧子40の矢印C−D方向の移動が円滑に行われる。また、調整ねじ30に直接皿ばね29を係合させずに、押圧子40を介して行ったので凹部40bの加工が容易になるとともに、皿ばね29に凹部を形成することがないので、皿ばね29のばね特性を損なうことがない。
【0021】
押圧部材31は皿ばね29の付勢力が解除され、調整ギア18の矢印B方向への押圧が解除されるので、これと一体の両面刷カム19の片面刷カム17に対する固定が解除される。調整軸25を回動させると、かさ歯車24,23、軸21、中間歯車20を介して調整歯車18が回動し、これと一体の両面刷用カム19も回動し、フレームに固定された片面刷用カム17との位相が調整されて、片面刷と両面刷との切替えが行われる。
【0022】
切替えが終了したら、エアシリンダ27を非作動状態とすると、作動ロッド27aが進出し、レバー33がピン36を回動中心として図中時計方向に回動し、レバー28の一端28aに係合していたカム部33aの係合が解除される。皿ばね29の付勢力により、押圧子40が図3中矢印A方向に押圧され、その押圧力は調整ねじ30を介して揺動部材28に伝達され、揺動部材28をピン38と回動中心として反時計方向に付勢する。揺動部材28の他端28bが、ピン45を介して押圧部材31を矢印B方向に押圧するので、押圧部材31によって調整ギア18が矢印B方向に押圧され、これと一体の両面刷カム19が固定カムである片面刷ギア17に押圧されて固定される。このときも、押圧子40が矢印A−B方向に対して傾斜していないことにより、皿ばね29のばね特性を損なうことなく、揺動部材28に対して充分な揺動付勢を加えることができる。また、調整ねじ30を進退させることにより、皿ばね29による揺動部材28への押圧力を調整することができる。
【0023】
なお、本実施の形態では、反転機構付枚葉輪転印刷機における両面刷用カムに使用した例を示したが、図5に示す従来技術で説明した固定歯車と回転歯車にも適用できるし、枚葉印刷機の排紙装置において、吸引車を紙の天地方向に移動調整する手段にも適用できる。すなわち、移動調整手段としてのモータを駆動源としてモータ軸に軸着されたピニオンとラックとにおいて、バックラッシュを防止するためにラックをピニオン側に押圧する揺動部材をばねで付勢する際に、揺動部材とばねとの間に本発明の構造を適用できる。また、印刷機以外の他の装置にも利用できることは勿論である。また、調整ねじの係合部30aを半球状にし、皿ばねの表面を円錐状としたが、その逆でもよく、要はレバーが揺動した際に調整ねじの係合部30aが皿ばねの表面を滑動可能な構造であればよい。また、皿ばね29の付勢力を押圧子40および調整ねじ30を介して揺動部材28に伝達するようにしたが、直接皿ばね29を調整ねじ30に係合させてもよく、また、揺動部材28に調整ねじ30と同様な構造を形成することにより調整ねじ30を省略してもよい。また、付勢手段として皿ばね29としたが、圧縮スプリングでもよく、種々の設計変更が可能である。
【0024】
【発明の効果】
以上説明したように請求項1記載の発明によれば、付勢手段が付勢方向に対して傾斜することがないので、移動部材を確実に固定部材に固定することができるとともに、付勢手段の一側部に大きな荷重がかかるようなことがないので、付勢手段の耐久性を向上することができる。
【0025】
また、請求項2記載の発明によれば、揺動部材と付勢手段とが係合する部位が2箇所になるため、係合が安定する。
【図面の簡単な説明】
【図1】 本発明に係る移動部材固定装置を適用した反転機構付枚葉輪転印刷機における片面刷と両面刷との切替装置を示す断面図である。
【図2】 図1におけるII矢視図である。
【図3】 図2におけるIII-III 線断面図である。
【図4】 本発明に係る移動部材固定装置動作を説明するための模式図であって、(a)は拡大した図、(b)は全体の動作を示す概要図である。
【図5】 従来の移動部材固定装置を適用した反転機構付枚葉輪転印刷機における片面刷と両面刷との切替装置を示す断面図である。
【図6】 従来の移動部材固定装置動作を説明するために拡大した模式図である。
【符号の説明】
6…圧胴、10…爪軸、17…片面刷用カム、19…両面刷用カム、27…エアシリンダ、28…揺動部材、29…皿ばね、30…調整ねじ、30a…係合部、31…押圧部材、33a…カム部、40…押圧子。
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a moving member fixing device suitably applied to a moving cam fixing device in a sheet-fed rotary printing press with a reversing mechanism that can be used for, for example, single-sided printing and double-sided printing.
[0002]
[Prior art]
FIG. 5 is a sectional view showing a switching device between single-sided printing and double-sided printing in a sheet-fed rotary printing press with a reversing mechanism to which a conventional moving member fixing device disclosed in Japanese Utility Model Laid-Open No. 7-28635 is applied. In the figure, reference numeral 52 denotes a fixed gear, which is fixed to an end shaft 50 of a reversing cylinder (not shown) that is rotatably supported by the frame 51, and a small diameter portion 52a is provided on a circumferential portion of the fixed gear 52. And a stepped through hole 52b penetrating the side surface portion is formed. A rotation gear 53 is supported by the small diameter portion 52b of the fixed gear 52, and has a recess 53a corresponding to the stepped through hole 52b. 54 is a stepped bolt in which a flange portion 54a and a head portion 54b are formed on one end side, and is fitted into the stepped through hole 52b. Reference numeral 55 denotes an engaging member which is fitted to the stepped bolt 54 and is brought into contact with the concave portion 53a of the rotating gear 53 by screwing the nut 56. 57 is interposed between the stepped through hole 52b and the flange portion 54a of the stepped bolt 54. It is a mounted disc spring. Due to the biasing force of the disc spring 57, the stepped bolt 54 is given a movement behavior in the direction of arrow G in the figure, and the fixed gear 53 is fixed to the fixed gear 52 by the engaging element 55 and is configured to rotate integrally. .
[0003]
Reference numeral 60 denotes a cam lever, which is rotatably supported by a bearing 58 having a base end fixed to the fixed gear 52 via a shaft 59, and forms a cam portion 60a that contacts the head 54b of the stepped bolt 54. ing. Reference numeral 61 denotes a guide fixed to the fixed gear 52. A slit for guiding the cam lever 60 is formed, and a compression spring 62 for urging the cam lever 60 in a direction opposite to the arrow I direction is fitted. Reference numeral 64 denotes a pressing member, which is formed with a flange portion 64 a that engages with the cam lever 60 and is slidably supported by a bush 65 fitted to the cover 63. Reference numeral 66 denotes a lever, which is swingably supported by a bearing 67 fixed to the cover 63 via a shaft 68, and has one end connected to the pressing member 64. The other end of the lever 66 is pivotally attached to a rod 71 of an air cylinder 70 fixed so as to stand on the frame 51 via a pin 69.
[0004]
In such a configuration, when switching from single-sided printing to double-sided printing, when the air cylinder 70 is operated and the rod 71 is advanced in the H direction, the lever 66 rotates about the shaft 68 as a rotation center, and the pressing member 64 moves in the direction of arrow I, the flange 64a presses the cam lever 60, and the cam lever 60 rotates in the J direction with the shaft 59 as the rotation center. As the cam lever 60 rotates in the J direction, the large diameter portion of the cam portion 60a is pressed against the head portion 54b of the stepped bolt 54, and the stepped bolt 54 is opposed to the arrow G against the biasing force of the disc spring 57. Therefore, the pressing force to the concave portion 53a of the engaging element 55 is released, and the rotation gear 53 is unintegrated with the fixed gear 52. In such a state, the rotating gear 53 is rotated by driving means such as a motor (not shown) so that the phase with the fixed gear 53 corresponds to double-sided printing.
[0005]
[Problems to be solved by the invention]
However, in the conventional moving member fixing device described above, the cam lever 60 that rotates about the shaft 59 and the compression spring 62 that imparts a return habit to the cam lever 60 are compressed as shown in FIG. The spring 62 is in contact with the axial direction of the spring 62 with an inclination of an angle α. Therefore, the compression spring 62 is compressed while being inclined in the direction of the arrow K by the pressing force of the cam lever 60 that is in contact with the corner 62 a at the upper end of the compression spring 62. A load is applied. Since this is a repeated load, there is a problem that the durability of the compression spring 62 is reduced due to metal fatigue on the one side portion 62A side.
[0006]
The present invention has been made in view of the above-described conventional problems, and an object thereof is to provide a moving member fixing device in which the durability of the urging means for urging the swinging member is improved. .
[0007]
[Means for Solving the Problems]
In order to achieve this object, the moving member fixing device according to the present invention urges one end of the swinging member supported so as to be swingable by the biasing means, thereby moving the moving member on the other end side of the swinging member. A moving member fixing device that fixes the moving member to the fixing member by pressing the fixing member against the fixing member and swinging the swinging member against the biasing means by the driving means. a site a moving member and said biasing means is engaged, thereby forming a tapered and concave respectively, and movably supporting the biasing means biasing direction in a direction substantially perpendicular to the said rocking member The urging means moves in a direction substantially orthogonal to the urging direction of the urging means as the oscillating member is oscillated by engagement with the urging means .
Therefore, even when the swinging member is in contact with the biasing means in an inclined state, the engaging portion between the swinging member and the biasing means slides and the biasing means moves in a direction substantially perpendicular to the biasing direction. Therefore, the biasing means does not tilt with respect to the biasing direction.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view showing a switching device between single-sided printing and double-sided printing in a sheet-fed rotary printing press with a reversing mechanism to which a moving member fixing device according to the present invention is applied. FIG. FIG. 4 is a cross-sectional view taken along the line III-III in FIG. 2, FIG. 4 is a schematic diagram for explaining the operation, (a) is an enlarged view, and (b) is a schematic diagram showing the overall operation.
In FIG. 1, reference numeral 2 denotes a pair of left and right frames (one is not shown) of the printing unit, and bearing bushes 3 are fitted to the left and right frames 2. A taper roller bearing 5 whose movement in the axial direction is restricted by a lid 4 is engaged with the bearing bush 3, and an end shaft of the impression cylinder 6 is pivotally supported by the taper roller bearing 5. .
[0009]
The impression cylinder 6 is restricted from moving in the axial direction by a nut 7 screwed into the threaded portion of the end shaft and its own stepped portion, and via a gear fixed to the end of the shaft (not shown). It is configured to be driven from the driving side. A notch (not shown) having a triangular cross section is provided at a location where the outer peripheral portion of the impression cylinder 6 is equally divided in the circumferential direction, and both ends thereof are closed by the bearer 11. In both the notches, the claw shafts 10 are rotatably supported by bearings (not shown) in bearing bushes 12 fitted to the bearers 11, and are axially supported by the collars 13. Movement is restricted. Conventionally known claws (not shown) including paper are arranged in parallel on each claw shaft 10, and levers 14 are fixed to both ends of the claw shaft 10, and the free end portions thereof. A wide cam follower 15 is pivotally attached to the pin.
[0010]
An annular cam base 16 provided concentrically with the impression cylinder 6 is fixed to the inner surfaces of the left and right frames 2 by bolts. An annular single-sided printing cam 17 is supported on the cam base 16 so that the outer peripheral cam surface thereof is in contact with the cam follower 15 and is fixed to the cam base 16 with bolts. An annular adjustment gear 18 is supported on the outer peripheral surface of the cam base 16, and an annular double-sided printing cam 19 is brought into contact with the cam follower 15 on the adjustment gear 18. The bearing is supported and fixed to the adjustment gear 18 by bolts.
[0011]
An intermediate gear 20 that meshes with the adjustment gear 18 is fixed to one end of a shaft 21 that is rotatably supported between the frame 2 and a bracket 22 fixed to the frame 2. A bevel gear 23 is attached to the other end of the shaft 21 protruding from the bracket 22, and a bevel gear 24 fixed to one end of the adjustment shaft 25 is engaged with the bevel gear 23. Therefore, when the adjustment shaft 25 is rotated, the adjustment gear 18 is rotated via the bevel gears 24 and 23, the shaft 21, and the intermediate gear 20, and is fixed to the double-sided printing cam 19 and the frame. The phase with the single-sided printing cam 17 is adjusted, and switching between single-sided printing and double-sided printing is performed.
The reversing mechanism described above is not particularly different from a switching device between single-sided printing and double-sided printing in a sheet-fed rotary printing press with a reversing mechanism that has been widely used conventionally.
[0012]
Next, a mobile cam fixing device, which is a feature of the present invention, will be described with reference to FIGS.
The movable cam fixing device 26 provided outside the frame 2 includes an air cylinder 27 that functions as a driving means, a swinging member 28 that is supported in a swingable manner, a disc spring 29 that functions as a biasing means, and a swinging motion. It is generally composed of an adjusting screw 30 with a hexagonal hole screwed into one end side of the member 28 and a pressing member 31 engaged with the other end portion of the swinging member 28.
[0013]
One end of a lever 32 is fixed to the rod 27a of the air cylinder 27, and one end of a lever 33 is pivotally attached to the other end of the lever 32 via a pin 32a. A concave portion 34 is formed on the outer surface of the frame 2, and a fixing base 35 is fixed to the bottom of the concave portion 34 with a bolt, and an upper portion of the fixing base 35 is formed of a pair of opposing support portions 35 a, 35a protrudes. The other end portion of the above-described lever 33 engaged between the support portions 35a and 35a is rotatably supported by the support portions 35a and 35a via a pin 36. As shown in FIG. 3, the cam part 33a is protrudingly provided.
[0014]
The swing member 28 is swingably supported via pins 38 horizontally mounted on both sides of the recess 34 so that one end 28a of the swing member 28 is engaged with the cam portion 33a of the lever 33, and the other end 28b. Is formed in a bifurcated shape, and a threaded portion 28c is formed on one end 28a side. As shown in FIG. 3, a hemispherical engagement portion 30a is formed at the tip of the adjustment screw 30, and the engagement portion 30a protrudes by being screwed into the screw portion 28c of the swing member 28.
[0015]
Reference numeral 40 denotes a presser formed in a substantially columnar shape. A flange portion 40a is formed on one end side, and a conical recess 40b is formed in the center of the surface of the flange portion 40a. An annular stopper 41 is fixed to the. A concave portion 34a having a small diameter is formed on the bottom portion of the concave portion 34 of the frame 2 corresponding to the adjusting screw 30. The diameter of the concave portion 34a is formed by 2Δ larger than the outer diameter of the stopper 41 described above. An annular spring receiving member 42 is loosely inserted into the pressing element 40, and the outer diameter of the spring receiving member 42 is formed larger than the inner diameter of the recess 34a. A disc spring 29 is mounted between them.
[0016]
The spring receiving member 42 is engaged with the edge of the recess 34a. Therefore, as shown in FIGS. 3 and 4, the pressing element 40 is pressed in the direction of arrow A by the urging force of the disc spring 29, and the concave portion 40 b is engaged with the engaging portion 30 a of the adjusting screw 30. Is biased to rotate counterclockwise about the pin 38 as a center of rotation. In this state, the lower end portion of the pressing element 40 faces the recessed portion 34a, and a gap Δ is formed between the stopper 41 and the recessed portion 34a. It is movable in the direction of arrow CD, which is a direction orthogonal to the direction.
[0017]
An insertion hole 34b is formed in a portion corresponding to the adjustment gear 18 at the bottom of the recess 34 of the frame 2, and a substantially cylindrical pressing member 31 is attached to the bush 44 fitted in the insertion hole 34b by an arrow A-. It is slidably supported in the B direction. The upper end portion 31a of the pressing member 31 is formed in a substantially H-cut cross section, and the upper end portion 31a is formed in the pair of other ends 28b formed in the bifurcated shape of the swing member 28 described above, as shown in FIG. And a pin 45 implanted on the side surface of the pressing member 31 is engaged with the lower end of the other end 28b.
[0018]
Next, an operation for switching from single-sided printing to double-sided printing in a sheet-fed rotary printing press with a reversing mechanism having such a configuration will be described.
By operating the air cylinder 27 and retreating the rod 27a, the lever 33 rotates counterclockwise in the figure with the pin 36 as the rotation center via the lever 32, as shown by a two-dot chain line in FIG. To do. As shown in FIG. 3, since the cam portion 33 a of the lever 33 presses one end 28 a of the swing member 28, the swing member 28 resists the biasing force of the disc spring 29 and rotates clockwise about the pin 38. To turn. That is, as shown in FIGS. 4A and 4B, the engaging member 30 a of the adjusting screw 30 is recessed in the presser 40 while the swinging member 28 rotates clockwise around the pin 38. 40b is pressed in the direction of arrow B.
[0019]
At this time, the engaging portion 30a is formed in a hemispherical shape, the concave portion 40b is formed in a conical shape, and the pressing element 40 is in a direction orthogonal to the urging direction of the disc spring 29, that is, in the direction of the arrow CD. Since it is supported movably, the engaging portion 30a moves the pressing element 40 in the direction of arrow B and smoothly moves the distance δ in the direction of arrow C while smoothly sliding on the surface of the recess 40b. Therefore, the pressing element 40 maintains a state in which the axial direction thereof coincides with the arrows AB, which are the urging directions of the disc springs 29, so that the disc springs 29 are not compressed so as to be inclined. For this reason, since a large load is not applied to one side of the disc spring 29, the durability of the disc spring 29 is not affected.
[0020]
Further, since the engaging portion 30a is engaged with the concave portion 40b at two points E and F, when the pressing member 40 is pressed in the arrow B direction, the pressing member 40 is swung in the arrow CD direction. And can be pressed in a stable state. In addition, since the disc spring 29 is not directly brought into contact with the edge of the recess 34a of the frame 2 but through the spring receiving member 42, the frictional force generated between the edge of the recess 34a is reduced. The movement of the pressing element 40 in the direction of the arrow CD is smoothly performed. Further, since the disc spring 29 is not directly engaged with the adjusting screw 30 and is performed through the pressing element 40, the recess 40b is easily processed and the disc spring 29 is not formed with a recess. The spring characteristics of the spring 29 are not impaired.
[0021]
Since the urging force of the disc spring 29 is released from the pressing member 31 and the pressing of the adjustment gear 18 in the direction of arrow B is released, the fixing of the double-sided printing cam 19 integral with the pressing member 31 to the single-sided printing cam 17 is released. When the adjustment shaft 25 is rotated, the adjustment gear 18 is rotated via the bevel gears 24 and 23, the shaft 21, and the intermediate gear 20, and the double-sided printing cam 19 integrated therewith is also rotated and fixed to the frame. The phase with the single-sided printing cam 17 is adjusted, and switching between single-sided printing and double-sided printing is performed.
[0022]
When the switching is completed, when the air cylinder 27 is deactivated, the actuating rod 27a advances, the lever 33 rotates clockwise with the pin 36 as the center of rotation, and engages with one end 28a of the lever 28. The engaged cam portion 33a is released. The pressing force 40 is pressed in the direction of arrow A in FIG. 3 by the biasing force of the disc spring 29, and the pressing force is transmitted to the swing member 28 via the adjusting screw 30, and the swing member 28 is rotated with the pin 38. Energizes counterclockwise as the center. Since the other end 28b of the swing member 28 presses the pressing member 31 in the direction of arrow B via the pin 45, the adjustment gear 18 is pressed in the direction of arrow B by the pressing member 31, and the double-sided printing cam 19 integrated therewith. Is pressed and fixed to the single-sided printing gear 17 which is a fixed cam. Also at this time, since the pressing element 40 is not inclined with respect to the arrow AB direction, a sufficient oscillating bias is applied to the oscillating member 28 without impairing the spring characteristics of the disc spring 29. Can do. Further, by moving the adjustment screw 30 back and forth, the pressing force applied to the swing member 28 by the disc spring 29 can be adjusted.
[0023]
In the present embodiment, an example in which the double-sided printing cam is used in a sheet-fed rotary printing press with a reversing mechanism is shown, but it can also be applied to the fixed gear and the rotating gear described in the prior art shown in FIG. In the paper discharge device of the sheet-fed printing machine, the present invention can also be applied to means for moving and adjusting the suction wheel in the direction of the paper. That is, when a spring is used to bias a swinging member that presses the rack toward the pinion side in order to prevent backlash in the rack and the pinion that is mounted on the motor shaft with the motor as the movement adjusting means as the drive source. The structure of the present invention can be applied between the swing member and the spring. Needless to say, the present invention can also be used for devices other than printing machines. The adjustment screw engaging portion 30a is hemispherical and the disk spring has a conical surface. However, the opposite is also possible. In other words, the adjustment screw engaging portion 30a is made of the disk spring when the lever swings. Any structure that can slide on the surface may be used. Further, although the urging force of the disc spring 29 is transmitted to the swing member 28 via the presser 40 and the adjustment screw 30, the disc spring 29 may be directly engaged with the adjustment screw 30. The adjustment screw 30 may be omitted by forming a structure similar to the adjustment screw 30 on the moving member 28. Further, although the disc spring 29 is used as the biasing means, a compression spring may be used, and various design changes are possible.
[0024]
【The invention's effect】
As described above, according to the first aspect of the present invention, since the urging means is not inclined with respect to the urging direction, the moving member can be reliably fixed to the fixed member, and the urging means Since a large load is not applied to the one side portion, the durability of the biasing means can be improved.
[0025]
According to the second aspect of the present invention, since there are two places where the swing member and the biasing means are engaged, the engagement is stable.
[Brief description of the drawings]
FIG. 1 is a sectional view showing a switching device between single-sided printing and double-sided printing in a sheet-fed rotary printing press with a reversing mechanism to which a moving member fixing device according to the present invention is applied.
FIG. 2 is a view taken along arrow II in FIG.
FIG. 3 is a cross-sectional view taken along line III-III in FIG.
4A and 4B are schematic diagrams for explaining the operation of the moving member fixing device according to the present invention, where FIG. 4A is an enlarged view, and FIG. 4B is a schematic diagram showing the overall operation.
FIG. 5 is a sectional view showing a switching device between single-sided printing and double-sided printing in a sheet-fed rotary printing press with a reversing mechanism to which a conventional moving member fixing device is applied.
FIG. 6 is an enlarged schematic view for explaining the operation of a conventional moving member fixing device.
[Explanation of symbols]
6 ... Impression cylinder, 10 ... Claw shaft, 17 ... Single-sided printing cam, 19 ... Double-sided printing cam, 27 ... Air cylinder, 28 ... Swing member, 29 ... Belleville spring, 30 ... Adjustment screw, 30a ... Engagement part 31 ... Pressing member, 33a ... Cam part, 40 ... Presser.

Claims (2)

揺動自在に支持した揺動部材の一端を付勢手段によって付勢することによって揺動部材の他端側で移動部材を固定部材に押圧して固定するとともに、駆動手段によって前記付勢手段に抗して揺動部材を揺動させることにより移動部材の固定部材に対する固定を解除する移動部材固定装置において、前記揺動部材と前記付勢手段とが係合する部位を、それぞれ先細り状および凹状に形成するとともに、付勢手段を付勢方向と略直交する方向に移動自在に支持し、前記揺動部材と前記付勢手段との係合によって前記揺動部材の揺動にともない前記付勢手段がこの付勢手段の付勢方向と略直交する方向に移動することを特徴とする移動部材固定装置。By urging one end of the oscillating member supported so as to be oscillated by the urging means, the moving member is pressed against and fixed to the fixing member on the other end side of the oscillating member, and the urging means is driven by the driving means. In the moving member fixing device that releases the fixing of the moving member with respect to the fixing member by swinging the swinging member against each other, the portions where the swinging member and the urging means are engaged are tapered and recessed, respectively. The urging means is movably supported in a direction substantially perpendicular to the urging direction, and the urging force is generated when the oscillating member is oscillated by the engagement of the oscillating member and the urging means. The moving member fixing device characterized in that the means moves in a direction substantially perpendicular to the urging direction of the urging means . 請求項1記載の移動部材固定装置において、揺動部材と付勢手段とが係合する部位をそれぞれ半球状および円錐状に形成したことを特徴とする移動部材固定装置。  2. The moving member fixing device according to claim 1, wherein portions where the swinging member and the biasing means are engaged are formed in a hemispherical shape and a conical shape, respectively.
JP16724798A 1998-06-15 1998-06-15 Moving member fixing device Expired - Fee Related JP4050389B2 (en)

Priority Applications (1)

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JP4050389B2 true JP4050389B2 (en) 2008-02-20

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