JPH01133248A - Tape take up device - Google Patents
Tape take up deviceInfo
- Publication number
- JPH01133248A JPH01133248A JP62291438A JP29143887A JPH01133248A JP H01133248 A JPH01133248 A JP H01133248A JP 62291438 A JP62291438 A JP 62291438A JP 29143887 A JP29143887 A JP 29143887A JP H01133248 A JPH01133248 A JP H01133248A
- Authority
- JP
- Japan
- Prior art keywords
- driving force
- control member
- force control
- plate
- tape
- 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.)
- Pending
Links
- 238000004804 winding Methods 0.000 claims description 45
- 230000005540 biological transmission Effects 0.000 claims description 31
- 238000010586 diagram Methods 0.000 description 13
- 230000008929 regeneration Effects 0.000 description 4
- 238000011069 regeneration method Methods 0.000 description 4
- 238000000926 separation method Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000007799 cork Substances 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Landscapes
- Transmission Devices (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、ＶＴＲ等に備えられるテープ巻き取り装置に
関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a tape winding device included in a VTR or the like.
（従来の技術）
第８図は、テープ巻き取り装置が備えられるＶＴＲのテ
ープ駆動機構の概略構成図である。第８図において、テ
ープ１は、テープカセット２に設けられた２つのリール
に両端が巻き取られている。そして、テープカセット２
がＶＴＲに装着されると、テープ１が適宜な機構により
引き出され、ヘッドシリンダ５に巻回されるとともにキ
ャプスタン６とピンチローラ−７とで挟持されてテープ
走行がなされる。さらに、図示しないモータによりテー
プ巻き取り装置を介して駆動されるセンタープーリー８
にアイドラー９が噛合連結され、センタープーリー８の
回転方向に応じてアイドラー９が矢印Ｃのごとく揺動さ
れてリール台３．４に設けられたギアのいずれか一方に
噛合し、リール台３，４の一方が回転駆動される。(Prior Art) FIG. 8 is a schematic diagram of a tape drive mechanism of a VTR equipped with a tape winding device. In FIG. 8, tape 1 has both ends wound around two reels provided in tape cassette 2. In FIG. And tape cassette 2
When the tape 1 is installed in a VTR, the tape 1 is pulled out by a suitable mechanism, wound around a head cylinder 5, and held between a capstan 6 and a pinch roller 7 to run the tape. Furthermore, a center pulley 8 is driven by a motor (not shown) via a tape winding device.
An idler 9 is meshed and connected to the center pulley 8, and according to the direction of rotation of the center pulley 8, the idler 9 is swung in the direction of arrow C and meshed with one of the gears provided on the reel stand 3.4. 4 is rotationally driven.
このようなテープ駆動機構にあっては、テープｌを矢印
Ａ方向に走行させて一方のリールに巻き取らせるときに
正転再生がなされ、テープ１を逆方向の矢印Ｂ方向に走
行させて他方のリールに巻き取らせるときに逆転再生が
なされる。また、ピンチローラ−７をキャプスタン６か
ら分離させた位置としてテープ１を高速でいずれか一方
のリールに巻き取らせることで巻き戻しまたは早送りが
なされる。In such a tape drive mechanism, forward playback is performed when the tape 1 is run in the direction of arrow A and wound onto one reel, and played back in normal rotation when the tape 1 is run in the opposite direction, in the direction of arrow B, to be wound onto the other reel. Reverse playback is performed when reeling. Further, by setting the pinch roller 7 at a position separated from the capstan 6 and winding the tape 1 onto one of the reels at high speed, rewinding or fast forwarding is performed.
ところで、第８図に示すテープ駆動機構にあっては、テ
ープ１を矢印へ方向に走行させるさいは、テープ１を走
行させるキャプスタン６とピンチローラ−７がヘッドシ
リンダ５より送行方向下流側にある。このため、テープ
１を矢印へ方向に走行させるさいに、テープ１が受ける
ヘッドシリンダ５やガイドポスト等との摩擦抵抗力がキ
ャプスタン６とピンチローラ−７で挟持されてテープ１
に与えられる駆動力により相殺され、リール台４は小さ
な巻き取りトルクでテープ１を巻き取ることができる。By the way, in the tape drive mechanism shown in FIG. 8, when the tape 1 is run in the direction of the arrow, the capstan 6 and the pinch roller 7 that run the tape 1 are located downstream of the head cylinder 5 in the feeding direction. be. Therefore, when the tape 1 is run in the direction of the arrow, the frictional resistance force that the tape 1 receives from the head cylinder 5, guide post, etc. is suppressed by the capstan 6 and the pinch roller 7, causing the tape 1 to move in the direction of the arrow.
This is offset by the driving force applied to the reel stand 4, which allows the reel stand 4 to wind up the tape 1 with a small winding torque.
しかしながら、テープ１をＢ方向に走行させるさいは、
テープ１を走行させるキャプスタン６とピンチローラ−
７がヘッドシリンダ５より送行方向上流側にある。この
ため、テープ１を矢印Ｂ方向に走行させるさいに、テー
プ１が受けるヘッドシリンダ５やガイドポスト等との摩
擦抵抗によりリール台３は大きな巻き取りトルクでなけ
ればテープ１を巻き取ることができない。However, when running tape 1 in direction B,
Capstan 6 and pinch roller that run tape 1
7 is located upstream of the head cylinder 5 in the feeding direction. For this reason, when the tape 1 is run in the direction of arrow B, the reel stand 3 cannot wind up the tape 1 unless there is a large winding torque due to the frictional resistance that the tape 1 receives from the head cylinder 5, guide post, etc. .
さらに、ピンチローラ−７をキャプスタン６から分離さ
せてテープ１を巻き戻しまたは早送りするさいは、テー
プ１を高速走行させるために、巻き取り側となるリール
台３または４は、より大きな巻き取りトルクが必要とさ
れる。そこで、巻き取り側となるリール台３．４の巻き
取りトルクを適宜に切り換えるために、テープ駆動機構
にテープ巻き取り装置が備えられている。Furthermore, when rewinding or fast forwarding the tape 1 by separating the pinch roller 7 from the capstan 6, the reel stand 3 or 4 on the take-up side has a larger winding capacity in order to run the tape 1 at high speed. torque is required. Therefore, in order to appropriately switch the winding torque of the reel stand 3.4 on the winding side, the tape drive mechanism is equipped with a tape winding device.
第９図ないし第１１図により従来のテープ巻き取り装置
を説明する。第９図は、従来のテープ巻き取り装置の縦
断面図であり、第１０図は、第９図における正転再生の
さいのセンタープーリーと駆動力制御部材との軸方向の
位置関係を示す説明図であり、第１１図は、同じく逆転
再生のさいの位置関係を示す説明図である。A conventional tape winding device will be explained with reference to FIGS. 9 to 11. FIG. 9 is a longitudinal sectional view of a conventional tape winding device, and FIG. 10 is an explanation showing the axial positional relationship between the center pulley and the driving force control member during normal rotation playback in FIG. FIG. 11 is an explanatory diagram showing the positional relationship during reverse playback.
第９図において、シャーシｌＯに軸１１が垂設され、こ
の軸１１にセンタープーリー８と駆動板１２が回転自在
に配設される。また、軸１１には揺動アーム１３が揺動
自在に配設され、その遊端にセンタープーリー８のギア
と噛合するギアを有するアイドラー９が回転自在に配設
される。このアイドラー９はバネ１４の弾力によりフェ
ルト等の摩擦部材１５を介して揺動アーム１３に弾接さ
れ、この摩擦抵抗力によりセンタープーリー８の回転方
向に応じて揺動アーム１３がリール台３または４のいず
れか一方の側に揺動される。そして、リール台３および
４に設けられたギアにアイドラー９のギアが噛合してい
ずれか一方のリール台３または４が回転駆動される。In FIG. 9, a shaft 11 is vertically disposed on the chassis IO, and a center pulley 8 and a drive plate 12 are rotatably disposed on this shaft 11. Further, a swing arm 13 is swingably disposed on the shaft 11, and an idler 9 having a gear that meshes with the gear of the center pulley 8 is rotatably disposed at its free end. The idler 9 is brought into elastic contact with the swinging arm 13 via a friction member 15 such as felt due to the elasticity of the spring 14, and this frictional resistance causes the swinging arm 13 to move toward the reel stand 3 or 4 to either side. Then, the gears of the idler 9 mesh with the gears provided on the reel stands 3 and 4, and either one of the reel stands 3 or 4 is rotationally driven.
センタープーリー８には、駆動力制御部材１６が所定角
度相対回転可能であるとともに軸方向に移動可能に配設
される。この所定角度相対回転可能とする機構は、セン
タープーリー８に周方向に所定の長さを有する長孔８ａ
、８．−を穿設し、駆動力制御部材Ｉ６よりこれらの長
孔８．．８．−に挿入され長孔８．．８．−内で周方向
に所定範囲移動可能な突起１６．．１６゜・・・が設け
られて形成される。また、駆動板１２は、図示しないモ
ータによりベルト等を介して回転駆動されるが、この駆
動板１２にフェルト等の摩擦部材１７を介してクラッチ
伝達板１８が相対回転可能に配設される。しかも、クラ
ッチ伝達板【８は、軸方向に移動可能な駆動力制外部材
１６と相対回転しないように係合される。そして、クラ
ッチ伝達板１８と駆動力制御部材１６との間に第１のコ
イルバネ１９が縮設されて、クラッチ伝達板１８が摩擦
部材１７を介して駆動板１２に弾接され、駆動力制御部
材１６がセンタープーリー８側に弾性付勢される。さら
に、クラッチ伝達板１８と駆動板１２には、同心円上に
複数の孔１８．，１８□−と、＋２．．１２．−一が穿
設される。そして、クラッチ伝達板１８に、これらの孔
１８．．１８．−と１２．．１２．− に挿入可能な突
起２０．．２０□−を有する係合制御部材２０が軸方向
に移動可能で分離方向に抜は落ちないように配設される
。この係合制御部材２０とクラッチ伝達板１８との間に
第２のコイルバネ２１が縮設されて、突ｇ２０．，２０
．−が駆動板１２の孔１２．，１２．−に挿入されない
位置に弾性付勢される。この係合制御部材２０は、図示
しない機構により外部からの力で第２のコイルバネ２１
の弾力に抗して移動されて、突起２０．．２０．−が駆
動板１２の孔１２．，１２ａ−に挿入され、クラッチ伝
達板１８が駆動板１２に相対回転せずに連結駆動される
。そしてさらに、第１０図および第１１図に示すごとく
、センタープーリー８の駆動力制御部材１６と対向する
面に斜面からなる第１のカム突起８ ｂ、８ ｂ −・
・が設けられるとともに、この第１のカム突起８ｂ、８
ｂ・−に対向して駆動力制御部材１６に゛第２のカム突
起１６ｂ、１６ｂ−が設けられる。これらの第１と第２
のカム突起８ｂ。A driving force control member 16 is disposed on the center pulley 8 so as to be relatively rotatable by a predetermined angle and movable in the axial direction. This mechanism that allows relative rotation by a predetermined angle is provided by a long hole 8a having a predetermined length in the circumferential direction in the center pulley 8.
, 8. - are drilled through these elongated holes 8. through the driving force control member I6. ．． 8. - inserted into slotted hole 8. ．． 8. - A protrusion 16 movable within a predetermined range in the circumferential direction. ．． 16°... is formed. Further, the drive plate 12 is rotationally driven by a motor (not shown) via a belt or the like, and a clutch transmission plate 18 is disposed on the drive plate 12 through a friction member 17 such as felt so as to be relatively rotatable. Moreover, the clutch transmission plate [8 is engaged with the axially movable driving force control member 16 so as not to rotate relative to the drive force control member 16. A first coil spring 19 is compressed between the clutch transmission plate 18 and the driving force control member 16, so that the clutch transmission plate 18 is brought into elastic contact with the driving plate 12 via the friction member 17, and the driving force control member 16 is elastically biased toward the center pulley 8 side. Furthermore, the clutch transmission plate 18 and the drive plate 12 have a plurality of holes 18 . , 18□- and +2. ．． 12. - one is drilled. Then, these holes 18. are formed in the clutch transmission plate 18. ．． 18. - and 12. ．． 12. - a protrusion 20 which can be inserted into; ．． An engagement control member 20 having a diameter of 20□- is movable in the axial direction and is arranged so as not to fall in the separation direction. A second coil spring 21 is compressed between the engagement control member 20 and the clutch transmission plate 18, and the protrusion g20. ,20
．． - is the hole 12. of the drive plate 12. ,12. - It is elastically biased to a position where it is not inserted. The engagement control member 20 is activated by an external force to the second coil spring 21 by a mechanism (not shown).
is moved against the elasticity of the protrusion 20. ．． 20. - is the hole 12. of the drive plate 12. , 12a-, and the clutch transmission plate 18 is connected to and driven by the drive plate 12 without relative rotation. Furthermore, as shown in FIGS. 10 and 11, first cam protrusions 8b, 8b, which are sloped on the surface of the center pulley 8 facing the driving force control member 16.
* are provided, and the first cam protrusions 8b, 8
"Second cam protrusions 16b, 16b-" are provided on the driving force control member 16 opposite to the "second cam protrusions 16b, 16b-". These first and second
cam protrusion 8b.
８ ｂ ＝ 、 １６ｂ、＋６ｂ ・−によりカム機構
が形成される。A cam mechanism is formed by 8b=, 16b, +6b.-.
かかる構成において、正転再生のさいに、係合制御部材
２０は外部からの力により押圧されず突起２０、．２０
．−一は駆動板１２の孔１２．．＋２ａ−・に挿入され
ていない。そこで、駆動板１２の回転駆動が摩擦部材１
７を介してクラッチ伝達板１８を回転駆動させ、さらに
駆動力制御部材１６を回転駆動させる。そして、この駆
動力制御部材１６が第１０図の矢印りのごとく回転駆動
されるのに伴なって、センタープーリー８も同方向に回
転駆動されようとするが、センタープーリー８にはアー
イドラー９さらにリール台３または４が噛合連結されて
いて負荷トルクが加わるため、所定の位置まで相対回転
して駆動力制御部材１６がセンタープーリー８に軸方向
で近すいた位置となる。このため、第１のコイルバネ１
９は圧縮の小さい状態であり、緩い弾力でクラッチ伝達
板１８を駆動板１２に弾接させる。したがって、正転再
生のさいには、駆動板１２からクラッチ伝達板１８に伝
達される駆動トルクは比較的に小さく、巻き取り側とな
るリール台４は小さな巻き取りトルクで回転駆動される
。In this configuration, during normal rotation regeneration, the engagement control member 20 is not pressed by an external force and the protrusions 20, . 20
．． -1 is the hole 12 of the drive plate 12. ．． It is not inserted into +2a-. Therefore, the rotational drive of the drive plate 12 is caused by the rotation of the friction member 1.
7, the clutch transmission plate 18 is rotationally driven, and the driving force control member 16 is also rotationally driven. As this driving force control member 16 is driven to rotate as shown by the arrow in FIG. 10, the center pulley 8 also tries to be driven to rotate in the same direction. Since the reel stand 3 or 4 is meshed and connected and a load torque is applied, relative rotation occurs to a predetermined position, and the driving force control member 16 is brought closer to the center pulley 8 in the axial direction. Therefore, the first coil spring 1
9 is a state of low compression, and the clutch transmission plate 18 is brought into elastic contact with the drive plate 12 with a loose elasticity. Therefore, during normal rotation regeneration, the drive torque transmitted from the drive plate 12 to the clutch transmission plate 18 is relatively small, and the reel stand 4 on the winding side is rotationally driven with a small winding torque.
また、逆転再生のさいは、駆動板１２が逆方向に回転駆
動され、駆動力制御部材１６が第１１図の矢印Ｒのごと
く回転駆動される。この回転駆動に伴なって、センター
プーリー８と駆動力制御部材１６とは逆方向に所定角度
相対回転し、第１と第２のカム突起８ ｂ 、 ８ ｂ
＋＋＋、 １６ｂ、１６ｂ−により駆動力制御部材１
６は第１のコイルバネ１９の弾力に抗して軸方向で分離
する方向に移動される。このため第１のコイルバネ１９
は圧縮の大きい状態となり、強い弾力でクラッチ伝達板
１８を駆動板１２に弾接させる。したがって、逆転再生
のさいには、駆動板１２からクラッチ伝達板１８に伝達
される駆動トルクは比較的に大きく、巻き取り側となる
リール台３は大きな巻き取りトルクで回転駆動される。Furthermore, during reverse playback, the drive plate 12 is driven to rotate in the opposite direction, and the driving force control member 16 is driven to rotate as indicated by arrow R in FIG. Along with this rotational drive, the center pulley 8 and the driving force control member 16 rotate relative to each other by a predetermined angle in opposite directions, and the first and second cam protrusions 8 b , 8 b
+++, 16b, 16b- drive force control member 1
6 is moved in the direction of separation in the axial direction against the elasticity of the first coil spring 19. Therefore, the first coil spring 19
is in a highly compressed state, causing the clutch transmission plate 18 to come into elastic contact with the drive plate 12 with strong elasticity. Therefore, during reverse playback, the drive torque transmitted from the drive plate 12 to the clutch transmission plate 18 is relatively large, and the reel stand 3 on the winding side is rotationally driven with a large winding torque.
さらに、早送りおよび巻き戻しのさいには、図示しない
機構により外部からの力で係合制御部材２０が第２のコ
イルバネ２１の弾力に抗して移動され、突起２０□２０
１１−が駆動板１２の孔１２□１２．−に挿入され、ク
ラッチ伝達板１８と駆動板１２が相対回転せずに連結駆
動される。したがって、図示しないモータのトルクに応
じた極めて大きな巻き取りトルクで巻き取り側のリール
台３または４が回転駆動される。Furthermore, during fast forwarding and rewinding, the engagement control member 20 is moved by an external force by a mechanism not shown, against the elasticity of the second coil spring 21, and the protrusion 20□20
11- is the hole 12□12. of the drive plate 12. -, and the clutch transmission plate 18 and drive plate 12 are connected and driven without relative rotation. Therefore, the reel stand 3 or 4 on the winding side is rotationally driven with an extremely large winding torque corresponding to the torque of a motor (not shown).
（発明が解決しようとする問題点）
かかる構成の従来のテープ巻き取り装置にあっては、部
品点数が多く、それだけ構造が複雑であるとともに多く
の組み立て工数を必要とし、装置として高価なものにな
るという問題点があった。(Problems to be Solved by the Invention) The conventional tape winding device having such a configuration has a large number of parts, which complicates the structure and requires a lot of assembly man-hours, making the device expensive. There was a problem with that.
そこで、部品点数の削減が要望されていた。Therefore, it has been desired to reduce the number of parts.
本発明の目的は上記した従来のテープ巻き取り装置の問
題点を解決するためになされた・もので、部品点数が削
減されたテープ巻き取り装置を提供することにある。An object of the present invention is to solve the problems of the conventional tape winding device described above, and to provide a tape winding device with a reduced number of parts.
（問題点を解決するための手段）
かかる目的を達成するために、本発明のテープ巻き取り
装置は、リール台に駆動力を伝達するセンタープーリー
に対して、駆動力制御部材を前記センタープーリーと同
軸芯上で所定角度相対回転可能であるとともに軸方向に
移動可能に配設し、クラッチ伝達板を前記同軸芯上で前
記駆動力制御部材に対して相対回転しないように配設し
、コイルバネを前記クラッチ伝達板と前記駆動力制御部
材との間に縮設し、駆動板を前記同軸芯上で前記コイル
バネの弾力により前記クラッチ伝達板が摩擦係合するよ
うに配設し、カム機構を前記センタープーリーと前記駆
動力制御部材との所定角度相対回転により前記駆動力制
御部材を軸方向に第１の位置とこの第１の位置より前記
コイルバネが圧縮される第２の位置とに切り換えるよう
に配設し、さらに前記駆動力制御部材を外部からの力で
軸方向に前記第２の位置より前記コイルバネがより圧縮
される第３の位置に切り換えると前記駆動力制御部材と
前記駆動板が相対回転せずに連結駆動するように構成さ
れている。(Means for Solving the Problems) In order to achieve the above object, the tape winding device of the present invention has a driving force control member connected to the center pulley that transmits the driving force to the reel stand. A clutch transmission plate is arranged so as to be relatively rotatable by a predetermined angle on the coaxial core and movable in the axial direction, a clutch transmission plate is arranged on the coaxial core so as not to rotate relative to the driving force control member, and a coil spring is arranged so as to be movable in the axial direction. The cam mechanism is compressed between the clutch transmission plate and the driving force control member, the driving plate is disposed on the coaxial core so that the clutch transmission plate is frictionally engaged by the elasticity of the coil spring, and the cam mechanism is disposed between the clutch transmission plate and the driving force control member. The driving force controlling member is switched in the axial direction between a first position and a second position in which the coil spring is compressed from the first position by relative rotation of a center pulley and the driving force controlling member by a predetermined angle. When the driving force control member is further axially switched from the second position to a third position where the coil spring is more compressed by an external force, the driving force control member and the drive plate are moved relative to each other. It is configured to be coupled and driven without rotating.
（作用）
したがって、駆動板が一方向に回転駆動されると、駆動
力制御部材は第１の位置となり、巻き取り側のリール台
は比較的に小ざな巻き取りトルクで回転駆動され、また
、駆動板が逆方向に回転駆動されると、駆動力制御部材
は第２の位置となり、巻き取り側のリール台は比較的に
大きな巻き取りコルクで回転駆動される。しかも、外部
からの力で駆動力制御部材を第３の位置とすれば、駆動
力制御部材は駆動板に相対回転しないように連結駆動さ
れて巻き取り側のリール台は極めて大きな巻き取りトル
クで回転駆動される。(Function) Therefore, when the drive plate is rotationally driven in one direction, the driving force control member is in the first position, the reel stand on the winding side is rotationally driven with a relatively small winding torque, and When the driving plate is rotationally driven in the opposite direction, the driving force control member is in the second position, and the reel stand on the winding side is rotationally driven by a relatively large winding cork. Moreover, if the driving force control member is set to the third position by an external force, the driving force control member is connected and driven to the drive plate so as not to rotate relative to it, and the reel stand on the winding side receives an extremely large winding torque. Rotationally driven.
（実施例）
以下、本発明の実施例を第１図ないし第７図を参照して
説明する。第１図は、本発明のテープ巻き取り装置の分
解斜視図であり、第２図は、第１図の正転再生のさのの
組み立て縦断面図であり、第３図は、第２図におけるカ
ム機構の説明図であり、第４図は、第１図の逆転再生の
さいの組み立て縦断面図であり、第５図は、第４図にお
けるカム機構の説明図であり、第６図は、第１図の早送
りおよび巻き戻しのさいの組み立て縦断面図であり、第
７図は、第６図におけるカム機構の説明図である。なお
、第２．４．６図において、センタープーリーと噛合連
結するアイドラー等の構造は従来と同様であり省略され
ている。(Example) Hereinafter, an example of the present invention will be described with reference to FIGS. 1 to 7. FIG. 1 is an exploded perspective view of the tape winding device of the present invention, FIG. 2 is an assembled vertical cross-sectional view of the normal rotation playback receptacle of FIG. 1, and FIG. 4 is an explanatory diagram of the cam mechanism in FIG. 1, FIG. 5 is an explanatory diagram of the cam mechanism in FIG. 4, and FIG. 1 is an assembled longitudinal sectional view during fast forwarding and rewinding of FIG. 1, and FIG. 7 is an explanatory diagram of the cam mechanism in FIG. 6. In Fig. 2.4.6, the structure of the idler etc. that meshes with the center pulley is the same as the conventional one and is omitted.
第１図ないし第７図において、シャーシ３０に軸３１が
垂設され、この軸３１にセンタープーリー３２と駆動板
３３が回転自在に配設される。このセンタープーリー３
２には、駆動力制御部材３４が所定角度相対回転可能で
あるとともに軸方向に移動可能に配設される。この所定
角度相対回転可能とする機構は、駆動力制御部材３４に
周方向に所定の長さを有する長孔３４．．３４．−を穿
設し、センタープーリー３２よりこれらの長孔３４□３
４．−に挿入され長孔３４、．３４．−一内で周方向に
所定範囲移動可能な突起３２、．３２．−が設けられて
形成される。また、駆動板３３は、図示しないモータに
よりベルト等を介して駆動されるが、この駆動板３３に
フェルト等の摩擦部材３５を介してクラッチ伝達板３６
が相対回転可能に配設される。しかも、クラッチ伝達板
３６は、軸方向に移動可能な駆動力制御部材３４と相対
回転しないように係合される。この相対回転しないよう
に係合する機構は、クラッチ伝達板３６に同心円上に複
数のスリット３６ａ、３Ｂ、−を穿設し、駆動力ＩＩ御
部材３４にスリット３６゜、３６ａ−・・に挿入される
突起３４ｂ、３４ｂ−を設けて形成される。さらに、駆
動板３３にスリット３６ｊ、３６．〜・と同心円上で突
起３４ｂ。1 to 7, a shaft 31 is vertically disposed on a chassis 30, and a center pulley 32 and a drive plate 33 are rotatably disposed on this shaft 31. This center pulley 3
2, a driving force control member 34 is disposed to be relatively rotatable by a predetermined angle and movable in the axial direction. This mechanism that allows relative rotation by a predetermined angle is provided in the driving force control member 34 through a long hole 34 having a predetermined length in the circumferential direction. ．． 34. - are drilled through these long holes 34□3 from the center pulley 32.
4. - inserted into the long holes 34, . 34. - a protrusion 32 movable within a predetermined range in the circumferential direction; 32. - is provided and formed. The drive plate 33 is driven by a motor (not shown) via a belt or the like, and a clutch transmission plate 36 is connected to the drive plate 33 via a friction member 35 such as felt.
are arranged to be relatively rotatable. Furthermore, the clutch transmission plate 36 is engaged with the axially movable driving force control member 34 so as not to rotate relative to the drive force control member 34 . This mechanism that engages so as not to rotate relative to each other has a plurality of slits 36a, 3B, . It is formed by providing projections 34b, 34b-. Further, the drive plate 33 has slits 36j, 36. The protrusion 34b is concentric with ~.
３４ｂ・−が挿入できる複数の孔３３．．３３．−が穿
設される。そして、駆動力制御部材３４が一方向に後述
する第１と第２の位置で、駆動力制御部材３４の突起３
４ｂ、３４ｂ−・が駆動板３３の孔３３．，３３．−・
・に挿入されることなくクラッチ伝達板３６のスリット
３６ａ。A plurality of holes 33.34b.- can be inserted. ．． 33. - is drilled. Then, the protrusion 3 of the driving force control member 34 is positioned in the first and second positions, which will be described later, in one direction.
4b, 34b-. are the holes 33. of the drive plate 33. , 33. −・
- The slit 36a of the clutch transmission plate 36 without being inserted into the slit 36a.
３６ａ・−にのみ挿入され、駆動力制御部材３４が軸方
向に後述する第３の位置で突起３４ｂ、３４ｂ ”−が
駆動板３３の孔３３．，３３．−に挿入されるよう構成
される。また、クラッチ伝達板３６と駆動力制御部材３
４との間にコイルバネ３７が縮設されて、クラッチ伝達
板３６が摩擦部材３５を介して駆動板３３に弾接され、
駆動力制御部材３４がセンタープーリー３２側に弾性付
勢される。さらに、第３．５．７図に示すごとく、セン
タープーリー３２の駆動力制御部材３４と対向する面に
斜面からなる第１のカム部３２ｂ。36a.-, and the protrusions 34b, 34b''- are inserted into the holes 33., 33.- of the drive plate 33 when the driving force control member 34 is at a third position described later in the axial direction. In addition, the clutch transmission plate 36 and the driving force control member 3
4, a coil spring 37 is compressed between the clutch transmission plate 36 and the drive plate 33 via the friction member 35,
The driving force control member 34 is elastically biased toward the center pulley 32 side. Furthermore, as shown in FIG. 3.5.7, the first cam portion 32b is formed of an inclined surface on the surface of the center pulley 32 facing the driving force control member 34.
３２ｂ・・・が形成されるとともに、この第１のカム部
３２ｂ、３２ｂ−に対向して駆動力制御部材３４に第２
のカム部３４ｅ、３４ｃｍ・・が形成される。これらの
第１と第２のカム部３２ｂ 、３２ｂ −、３４ｃ、３
４．、 ・”によりカム機構が形成されている。さらに
、駆動力制御部材３４は、図示しない機構により外部か
らの力でコイルバネ３７の弾力に抗して移動されて突起
３４．。32b... are formed, and a second cam portion is formed in the driving force control member 34 opposite to the first cam portions 32b, 32b-.
cam portions 34e, 34cm... are formed. These first and second cam portions 32b, 32b-, 34c, 3
4. A cam mechanism is formed by ``.''.Furthermore, the driving force control member 34 is moved against the elasticity of the coil spring 37 by an external force by a mechanism (not shown) to cause the protrusion 34.
３４、・−が駆動板３３の孔３３．．３３．−に挿入さ
れ、駆動力制御部材３４と駆動板３３とが相対回転せず
に連結駆動される。なお、３８は、スラスト受けである
。34, .- are the holes 33. of the drive plate 33. ．． 33. -, and the driving force control member 34 and the driving plate 33 are connected and driven without relative rotation. Note that 38 is a thrust receiver.
かかる構成において、正転再生のさいに、駆動板３３の
回転駆動が摩擦部材３５を介してクラッチ伝達板３６を
回転駆動させ、さらに駆動力制御部材３４を回転駆動さ
せる。そこで、この駆動力制御部材３４が第３図の矢印
りのごとく回転駆動されるのに伴なって、センタープー
リー３２も同方向に回転駆動されようとするが、センタ
ープーリー３２には負荷トルクが加わるため所定の位置
まで相対回転し、駆動力制御部材３４がセンタープーリ
ー３２に軸方向で近すいた第２図および第３図のごとき
第１の位置となる。この第１の位置では、コイルバネ３
７は圧縮が小さい状態であり、緩い弾力でクラッチ板３
６を駆動板３３に弾接させる。したがって、正転再生の
さいには、駆動力制御部材３４に伝達される駆動トルク
は比較的に小さく、巻き取り側となるリール台４は小さ
な巻き取りトルクで回転駆動される。In this configuration, during normal rotation regeneration, the rotational drive of the drive plate 33 rotationally drives the clutch transmission plate 36 via the friction member 35, and further rotationally drives the driving force control member 34. Therefore, as this driving force control member 34 is driven to rotate in the direction of the arrow in FIG. 3, the center pulley 32 also tries to be driven to rotate in the same direction. As a result, the driving force control member 34 is relatively rotated to a predetermined position, and the driving force control member 34 is in the first position as shown in FIGS. 2 and 3, in which the driving force control member 34 is axially close to the center pulley 32. In this first position, the coil spring 3
7 is a state where the compression is small, and the clutch plate 3 is loosely elastic.
6 is brought into elastic contact with the drive plate 33. Therefore, during normal rotation regeneration, the driving torque transmitted to the driving force control member 34 is relatively small, and the reel stand 4 on the winding side is rotationally driven with a small winding torque.
また、逆転再生のさいは、駆動板３３が逆方向に回転駆
動され、駆動力制御部材３４が第５図の矢印Ｒのごとく
回転駆動される。この回転駆動に伴なって、センタープ
ーリー３２と駆動力制御部材３４とは逆方向に所定角度
相対回転し、第１と第２のカム部３２ｂ、３２ｂ ｍ、
” ３４ｃ、３４ｃ−により駆動力制御部材３４はコイ
ルバネ３７の弾力に抗して軸方向で分離する方向に移動
されて第４図および第５図のごとく第２の位置となる。Furthermore, during reverse playback, the drive plate 33 is driven to rotate in the opposite direction, and the driving force control member 34 is driven to rotate as indicated by arrow R in FIG. Along with this rotational drive, the center pulley 32 and the driving force control member 34 rotate relative to each other by a predetermined angle in opposite directions, and the first and second cam portions 32b, 32b m,
34c, 34c-, the driving force control member 34 is moved in the direction of separation in the axial direction against the elasticity of the coil spring 37, and reaches the second position as shown in FIGS. 4 and 5.
この第２の位置では、コイルバネ３７は圧縮が大きい状
態となり、強い弾力でクラッチ伝達板３６を駆動板３３
に弾接させる。したがって、逆転再生のさいには、駆動
力制御部材３４に伝達される駆動トルクは比較的に大き
く、巻き取り側となるリール台３は大きな巻き取りトル
クで回転駆動される。In this second position, the coil spring 37 is highly compressed, and its strong elasticity moves the clutch transmission plate 36 towards the drive plate 33.
make it come into contact with the ball. Therefore, during reverse playback, the driving torque transmitted to the driving force control member 34 is relatively large, and the reel stand 3 on the winding side is rotationally driven with a large winding torque.
さらに、早送りおよび巻き戻しのさいには、図示しない
機構により外部′からの力で駆動力制御部材３４がコイ
ルバネ３７の弾力に抗して軸方向に大きく移動されて第
６図および第７図のごとく第３の位置となる。この第３
の位置では、駆動力制御部材３４の突起３４ｂ、３４ｂ
−が駆動板３３の孔３３．，３３ａ−に挿入され、駆動
力制御部材３４と駆動板３３が相対回転せずに連結駆動
される。したがって、図示しないモータのトルクに応じ
た極めて大きな巻き取りトルクで巻き取り側のリール台
３または４が回転駆動される。Furthermore, during fast forwarding and rewinding, the driving force control member 34 is largely moved in the axial direction by an external force by a mechanism (not shown) against the elasticity of the coil spring 37, as shown in FIGS. 6 and 7. It becomes the third position. This third
At the position, the protrusions 34b, 34b of the driving force control member 34
- is the hole 33. of the drive plate 33. , 33a-, and the driving force control member 34 and the driving plate 33 are connected and driven without relative rotation. Therefore, the reel stand 3 or 4 on the winding side is rotationally driven with an extremely large winding torque corresponding to the torque of a motor (not shown).
なお、センタープーリー３２に駆動力制御部材３４を所
定角度相対回転可能であるとともに軸方向に線動可能に
配設する機構は、上記実施例に限られず、第９図の従来
例に示すごとくセンタープーリー３２に周方向に所定長
さの長孔を穿設し、駆動力制御部材３４にこの長孔に挿
入され所定範囲移動可能な突起を設けて形成しても良い
。また、上記機構を、センタープーリー３２と駆動力制
御部材３４が相対回転する軸周接面の一方に幅の広い軸
方向の凹溝を穿設し、他方にこの凹溝に係合する幅の狭
い凸溝を穿設して形成しても良い。そして、上記機構は
、所望の動作が得られるいかなる構造であっても良いこ
とは勿論である。Note that the mechanism in which the driving force control member 34 is disposed on the center pulley 32 so as to be relatively rotatable by a predetermined angle and movable linearly in the axial direction is not limited to the above embodiment, and as shown in the conventional example in FIG. The pulley 32 may be provided with a long hole of a predetermined length in the circumferential direction, and the driving force control member 34 may be provided with a protrusion that is inserted into the long hole and movable within a predetermined range. In addition, the above-mentioned mechanism has a wide groove in the axial direction formed on one side of the shaft circumferential contact surface where the center pulley 32 and the driving force control member 34 rotate relative to each other, and a wide groove in the axial direction that engages with this groove on the other side. It may also be formed by drilling a narrow convex groove. It goes without saying that the above mechanism may have any structure that provides the desired operation.
（発明の効果）
以上説明したように、本発明のテープ巻き取り装置によ
れば、正転再生のさいと逆転再生のさいに、センタープ
ーリーと駆動力制御部材との所定角度相対回転によりカ
ム機構で駆動力制御部材が第１と第２の位置に切り換え
られるので、駆動力制御部材に伝達される駆動トルクが
切り換えられてリール台を回転駆動する巻き取りトルク
が切り換えられる。さらに、早送りおよび巻き戻しのさ
いに、駆動力制御部材を第３の位置として駆動板と駆動
連結するので、従来のこの種の装置のごときクラッチ伝
達板を駆動板に駆動連結するための別個の部材等が不要
となり、それだけ部品点数の削減ができる。したがって
、それだけテープ巻き取り装置の構造が簡単になるとと
もに組み立て工数が減少し、装置全体を安価に構成する
ことができるという優れた効果を奏する。(Effects of the Invention) As explained above, according to the tape winding device of the present invention, the cam mechanism is activated by the relative rotation of the center pulley and the driving force control member at a predetermined angle during normal rotation playback and reverse rotation playback. Since the drive force control member is switched between the first and second positions, the drive torque transmitted to the drive force control member is switched, and the winding torque that rotationally drives the reel stand is switched. Furthermore, since the driving force control member is in the third position and drivingly connected to the drive plate during fast forwarding and rewinding, a separate device for drivingly connecting the clutch transmission plate to the drive plate as in conventional devices of this type is required. No parts are required, and the number of parts can be reduced accordingly. Therefore, the structure of the tape winding device becomes simpler, the number of assembly steps is reduced, and the entire device can be constructed at low cost.
第１図は、本発明のテープ巻き取り装置の分解斜視図で
あり、第２図は、第１図の正転再生のさいの組み立て縦
断面図であり、第３図は、第２図におけるカム機構の説
明図であり、第４図は、第１図の逆転再生のさいの組み
立て縦断面図であり、第５図は、第４図におけるカム機
構の説明図であり、第６図は、第１図の早送りおよび巻
き戻しのさいの組み立て縦断面図であり、第７図は、第
６図におけるカム機構の説明図であり、第８図は、テー
プ巻き取り装置が備えられるＶＴＲのテープ駆動機構の
概略構成図であり、第９図は、従来のテープ巻き取り装
置の縦断面図であり、第１０図は、第９図における正転
再生のさいのセンタープーリーと駆動力制御部材との軸
方向の位置関係を示す説明図であり、第１１図は、同じ
く逆転再生のさいの位置関係を示す説明図である。
３．４＝リ一ル台、 ３２：センタープーリー、３４
：駆動力制御部材、３１：軸、
３６：クラッチ伝達板、３７：コイルバネ、３３：駆動
板、 ３２ｂ：第１のカム部、３匂 ：第２のカ
ム部、３６ａ＝スリツト、３３ａ：孔、 ３４
ｂ：突起。FIG. 1 is an exploded perspective view of the tape winding device of the present invention, FIG. 2 is an assembled vertical cross-sectional view of the tape winding device of FIG. FIG. 4 is an explanatory diagram of the cam mechanism, FIG. 4 is an assembled vertical sectional view during reverse playback in FIG. 1, FIG. 5 is an explanatory diagram of the cam mechanism in FIG. 4, and FIG. 6 is an explanatory diagram of the cam mechanism in FIG. , FIG. 7 is an explanatory diagram of the cam mechanism in FIG. 6, and FIG. 8 is a vertical sectional view of the VTR equipped with a tape winding device. FIG. 9 is a schematic configuration diagram of a tape drive mechanism, FIG. 9 is a longitudinal sectional view of a conventional tape winding device, and FIG. 10 is a diagram showing the center pulley and driving force control member during normal rotation playback in FIG. 9. FIG. 11 is an explanatory diagram showing the positional relationship in the axial direction with respect to the rotor, and FIG. 11 is an explanatory diagram showing the positional relationship during reverse playback. 3.4 = Reel stand, 32: Center pulley, 34
: Driving force control member, 31: Shaft, 36: Clutch transmission plate, 37: Coil spring, 33: Drive plate, 32b: First cam part, 3rd part: Second cam part, 36a=slit, 33a: hole, 34
b: Protrusion.
Claims (2)
対して、駆動力制御部材を前記センタープーリーと同軸
芯上で所定角度相対回転可能であるとともに軸方向に移
動可能に配設し、クラッチ伝達板を前記同軸芯上で前記
駆動力制御部材に対して相対回転しないように配設し、
コイルバネを前記クラッチ伝達板と前記駆動力制御部材
との間に縮設し、駆動板を前記同軸芯上で前記コイルバ
ネの弾力により前記クラッチ伝達板が摩擦係合するよう
に配設し、カム機構を前記センタープーリーと前記駆動
力制御部材との所定角度相対回転により前記駆動力制御
部材を軸方向に第１の位置とこの第１の位置より前記コ
イルバネが圧縮される第２の位置とに切り換えるように
配設し、さらに前記駆動力制御部材を外部からの力で軸
方向に前記第２の位置より前記コイルバネがより圧縮さ
れる第３の位置に切り換えると前記駆動力制御部材と前
記駆動板が相対回転せずに連結駆動するように構成した
ことを特徴とするテープ巻き取り装置。(1) With respect to the center pulley that transmits the driving force to the reel stand, a driving force control member is disposed so as to be able to rotate relative to the center pulley by a predetermined angle on the same axis and to be movable in the axial direction, thereby transmitting the clutch. disposing a plate on the coaxial core so as not to rotate relative to the driving force control member;
A coil spring is compressed between the clutch transmission plate and the driving force control member, the drive plate is disposed on the coaxial core so that the clutch transmission plate is frictionally engaged by the elasticity of the coil spring, and the cam mechanism The driving force controlling member is switched in the axial direction between a first position and a second position where the coil spring is compressed from the first position by relative rotation of the center pulley and the driving force controlling member at a predetermined angle. When the driving force control member is further axially switched to a third position in which the coil spring is more compressed than the second position by an external force, the driving force control member and the drive plate are A tape winding device characterized in that the tape winding device is configured to be connected and driven without relative rotation.
を穿設し、前記駆動板に前記スリットと同心円上で複数
の孔を穿設し、前記駆動力制御部材に前記第１と第２の
位置で前記スリットに挿入され前記第３の位置で前記孔
に挿入される突起を設けたことを特徴とする特許請求の
範囲第１項記載のテープ巻き取り装置。(2) A plurality of slits are formed concentrically in the clutch transmission plate, a plurality of holes are formed concentrically with the slits in the drive plate, and the first and second holes are formed in the drive force control member. 2. The tape winding device according to claim 1, further comprising a protrusion that is inserted into the slit at the third position and into the hole at the third position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62291438A JPH01133248A (en) | 1987-11-18 | 1987-11-18 | Tape take up device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62291438A JPH01133248A (en) | 1987-11-18 | 1987-11-18 | Tape take up device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01133248A true JPH01133248A (en) | 1989-05-25 |
Family
ID=17768871
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62291438A Pending JPH01133248A (en) | 1987-11-18 | 1987-11-18 | Tape take up device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01133248A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4042133A1 (en) * | 1989-12-30 | 1991-07-11 | Samsung Electronics Co Ltd | REEL DRIVE DEVICE FOR A MAGNETIC TAPE RECORDING AND PLAYBACK DEVICE |
| KR100377756B1 (en) * | 2000-12-11 | 2003-03-29 | 엘지전자 주식회사 | The clutch apparatus for VCR |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62219356A (en) * | 1986-03-20 | 1987-09-26 | Sanyo Electric Co Ltd | Reel base driving mechanism |
-
1987
- 1987-11-18 JP JP62291438A patent/JPH01133248A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62219356A (en) * | 1986-03-20 | 1987-09-26 | Sanyo Electric Co Ltd | Reel base driving mechanism |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4042133A1 (en) * | 1989-12-30 | 1991-07-11 | Samsung Electronics Co Ltd | REEL DRIVE DEVICE FOR A MAGNETIC TAPE RECORDING AND PLAYBACK DEVICE |
| KR100377756B1 (en) * | 2000-12-11 | 2003-03-29 | 엘지전자 주식회사 | The clutch apparatus for VCR |
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