JPH08138292A - Touch roller of fairly winding device of magnetic tape - Google Patents

Abstract

PURPOSE: To take up a magnetic tape to a tape reel in the fairly winding state without generating the stepped winding or wrincled phenomenon and also to eliminate the generation of secular change in the tape taking-up state, even by keeping over a long period or the like. CONSTITUTION: The touch roller 219, the length in the axial direction of which is made slightly smaller as compared with the confronting distance of upper and lower flange parts of the tape reel, is formed to be cylindrical so as to press with contact over the almost entire area in the breadthwise direction of the magnetic tape which is forwarded between the upper and lower flange parts and wound round the outer peripheral part of a hub. Also, the outer peripheral surface of the touch roller 219 is formed to the circular-arc shape, the diameter of which is gradually decreased as it goes to both end parts sides from the nearly center part of the axial direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a touch roller provided in a magnetic tape winding device for winding a magnetic tape drawn from a tape cassette on a tape reel in a wound state, and particularly to a flange portion of the tape reel. The present invention relates to a touch roller that is provided in a magnetic tape winding device that enters in between and applies a tension in a winding direction to the magnetic tape.

[0002]

2. Description of the Related Art Generally, a tape cassette rotatably accommodates a pair of tape reels each consisting of a hub and upper and lower flange portions integrally connected to the upper and lower side surfaces of the hub. It is composed of tapes. The magnetic tape is taken out from the supply-side reel and the information signal is recorded or reproduced by the recording / reproducing mechanism, and then wound on the winding-side reel. Digital video tape cassettes used for broadcasting stations and the like use long magnetic tapes as compared with general-purpose tape cassettes in order to enable long-term recording / reproduction.

Then, the video tape used for program broadcasting is generally judged as to whether or not it can be reused and stored based on the channel condition shown based on the error rate of the reproduced data. The digital errors caused by the video tape are mainly burst errors caused by scratches and dropouts on the magnetic layer of the video tape. Furthermore, since this digital error also affects dust, dirt, wrinkles, edge damage, etc. attached to the surface of the magnetic layer, it is necessary to handle the tape cassette with sufficient care.

Further, in the video tape cassette, the video tape is unwound from the supply reel and wound around the winding reel during the reproducing operation. Therefore, the used video tape cassette is rewound while the video tape is being rewound so that the video tape cassette can be reused after the quality evaluation of the video tape. On the other hand, the used video tape cassette is mounted on a tape winding device to perform rewinding operation of the video tape. During this rewinding operation, dust, dirt or magnetic powder adhering to the surface of the magnetic layer is removed. Cleaning is performed. This cleaning mechanism is generally disposed at a position immediately before the video tape pulled out from the take-up reel is pulled into the supply reel.

As described above, the video tape cassette is stored after being evaluated for cleaning processing and reuse, but it is necessary to wind the video tape in a state in which it is wound around the tape reel. A videotape cassette is a so-called edge damage phenomenon in which a part of a videotape is wound around a tape reel in a so-called step winding phenomenon in which part of the videotape jumps out to the side, and the part that pops out during transportation or long-term storage is damaged. Occurs. Further, in the video tape, a phenomenon such as wrinkling may occur even if the protruding portion is not damaged.

Further, in the tape cassette, when the video tape is wound on the tape reel, air is drawn between the tape layers, and the air layer may cause a wrinkle phenomenon in the video tape. The edge damage and wrinkles that have occurred on these video tapes have been judged to be usable even if the video tapes were judged to be usable by the evaluation of whether they can be reused after use. This causes a situation in which the reproduction characteristics are impaired and the tape cassette becomes unusable.

Therefore, the tape winding device is provided with a winding device for winding the video tape from the winding reel to the supply reel in a winding state with the ends aligned. This winding device includes a touch roller formed of an elastic material such as rubber or polyurethane synthetic resin. The touch roller enters between the upper and lower flange portions of the tape reel to press the video tape on the hub side. By the action of the touch roller, the video tape is wound around the outer peripheral surface of the hub in a stable state and with the air between the layers removed.

[0008]

By the way, a commercial digital video tape cassette capable of recording and reproducing for a long time, for example, a D-2 digital video tape cassette, has a large tape length and a thickness dimension. Is about 13
An extremely thin magnetic tape of about micron is used. In a video tape having such a small thickness, there is a problem that when the touch roller of the winding device is pressed against the tape, a pressure mark is generated at the edge portion of the touch roller, which adversely affects the reproduced waveform.

Therefore, in order to solve such a problem, the touch roller is chamfered at the upper and lower ends.
However, even with such a chamfered touch roller, the pressing force acting on the video tape acts substantially evenly at the contact portion with the video tape, but sharply with the point where the touch roller separates from the video tape as a boundary. Changes to. This rapid change in the pressing force causes a touch roller pressing mark on the video tape.

For example, in a tape reel provided with a flangeless reel having no flange portion on the upper and lower surfaces of the hub, the shape of the touch roller is not restricted by the facing interval of the flange portions, and therefore the longer axis than the width dimension of the video tape. It is possible to press the video tape over the entire width direction by using the touch roller. Therefore, the entire area of the video tape in the width direction is uniformly pressed by the touch roller, and the generation of pressing marks is prevented. Further, the pressing mark is less likely to occur when the thickness dimension is relatively large, such as a video tape for an open reel. However, such a flangeless reel, a video tape having a large thickness, and the like cannot be used at all in a commercial digital video tape cassette.

On the other hand, in the tape reel, the hub and the upper and lower flanges are generally integrally formed of a synthetic resin material in view of productivity, weight, dimensional accuracy and the like. Tape reel
The hub is drafted in consideration of mold releasability.
Since the lower flange portion of the tape reel that comes into contact with the reel base is used as the reference surface, the draft of the hub is gradually reduced toward the upper flange portion.

Therefore, even if the tape cassette is wound in the condition of uniform winding on the outer peripheral surface of the hub by the uniform winding device, the video tape shrinks due to a change with time due to long-term storage or the like. There is a restoring force that tries to return to the original. The tightening force on the hub acts with a large force when the diameter of the hub is large, and with a small force when the diameter is small. Therefore, the deterioration of the video tape progresses on the side of the lower flange portion formed as a large diameter portion.

The video tape wound on the tape reel has a large pressing force applied via the touch roller in order to remove the air between the layers and prevent the step winding phenomenon or the wrinkling phenomenon from occurring. It may be wound on a reel. For this reason, in the winding device, a plurality of convex shapes are formed on the outer peripheral portion of the touch roller so that a large pressing force is partially applied to the video tape while the pressing force is kept constant. The one configured in is also provided. However, since such a touch roller winds the video tape in such a manner that the portion in contact with the convex portion and the other portion are non-uniformly wound, there is a problem that the shape change is caused and the reproduction output is deteriorated. Give rise to.

Therefore, according to the present invention, a magnetic tape such as a video tape is wound around a tape reel in a regular winding state without causing a step winding phenomenon or a wrinkling phenomenon, and is also wound for long-term storage or the like. The present invention has been proposed for the purpose of providing a touch roller for a magnetic tape winding device in which the state does not change over time.

[0015]

A touch roller provided in a magnetic tape winding and winding apparatus according to the present invention which achieves this object has a length dimension in the axial direction with respect to a facing distance between upper and lower flange portions of a tape cassette. By making it slightly small, it enters between these upper and lower flange parts and is formed into a cylindrical shape that can be pressed against the magnetic tape wound around the outer peripheral part of the hub over substantially the entire width direction. The surface is formed in an arc shape so that the diameter dimension gradually decreases from the substantially central portion in the axial direction toward both end sides.

Further, in the touch roller provided in the magnetic tape winding apparatus according to the present invention, the diameter dimension of the portion corresponding to the upper flange side of the tape reel is larger than the diameter dimension of the portion corresponding to the lower flange side. Is configured. Further, the touch roller provided in the magnetic tape winding device according to the present invention has a length in the axial direction which is slightly smaller than the facing distance between the upper and lower flange portions so as to enter between the upper and lower flange portions. The magnetic tape wound around the outer peripheral portion of the hub is formed into a cylindrical shape that can be pressed against the substantially entire area in the width direction, and a spiral convex shape is integrally formed on the outer peripheral surface.

Furthermore, in the touch roller provided in the magnetic tape winding device according to the present invention, the spiral convex shape integrally formed on the outer peripheral surface of the touch roller has the spiral shape in the running direction of the magnetic tape. Is formed as a spiral convex shape in the direction of guiding the tape reel to the upper flange portion side.

[0018]

According to the touch roller provided in the magnetic tape winding device according to the present invention having the above-mentioned structure, the touch roller comprises the hub and the upper and lower flange portions integrally connected to the upper and lower side surfaces of the hub. With respect to the magnetic tape that is pulled out from one side of the pair of tape reels and wound up on the other side, the magnetic tape enters between the upper and lower flange portions of the winding side reel and abuts against the magnetic tape to press the outer peripheral side of the hub. The touch roller, which is formed in an arc shape so that the diameter gradually decreases from the central part toward both ends, acts on the magnetic tape so that it gradually decreases from the central part toward both ends. Let This pressing force does not abruptly change at both ends of the touch roller, and the pressing mark of the touch roller is not formed on the magnetic tape.

The touch roller having a diameter gradually increasing toward the upper end side gradually increases from the lower flange portion side toward the upper flange portion side with respect to the magnetic tape wound on the tape reel. Apply pressing force. Therefore, the magnetic tape wound on the tape reel with the draft gradually decreasing in diameter from the lower flange portion side to the upper flange portion side of the hub is subjected to a uniform pressing force in the width direction from the touch roller. As a result, the restoring force due to changes over time becomes uniform over the entire length of the hub.

The spiral convex shape formed on the outer peripheral portion of the touch roller has a surface pressure per unit area against the magnetic tape while maintaining a constant pressing force over the entire width direction of the wound magnetic tape. Is increased and pressed against the outer peripheral side of the hub to remove air between the layers to increase the friction coefficient between the layers and wind the magnetic tape around the outer peripheral portion of the hub in a uniform winding state. Therefore, in the magnetic tape, the phenomenon that the shape changes at a certain portion in the width direction does not occur.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A specific embodiment of the present invention will be described below with reference to FIGS. 1 to 24 of a magnetic tape winding device 101 of a tape cassette 1 used in a tape evaluation device 100. The tape evaluation apparatus 100 uses, for example, a take-up reel 2 in order to put a used video tape cassette 1 used for a program into a reusable state in a broadcasting station or the like.
This is a device for rewinding the magnetic tape 4 wound on the supply side reel 3 and evaluating whether or not it can be reused. The video tape cassette 1 is the tape evaluation device 1
Whether or not reuse is possible is determined by 00, and if it is determined to be usable, it is stored as it is, and if it is determined to be unusable, disposal such as disposal is performed.

As is well known, the video tape cassette 1 has a supply reel 3 and a take-up reel 2 rotatably provided inside a cassette body, and a magnetic tape wound around the peripheral surface of the supply reel 3. The tape 4 is guided along the inner surface of a lid 5 rotatably mounted on the front surface of the cassette body and wound around the peripheral surface of the take-up reel 2. The video tape cassette 1 has a loading space 6 located inside the lid 5 and having a substantially convex shape. Therefore, when the video tape cassette 1 is mounted in the recording / reproducing apparatus, the loading mechanism on the side of the apparatus enters the loading space 6 with the lid 5 pivoting to open the front surface of the cassette body. The magnetic tape 4 is pulled out and a predetermined loading operation is performed.

In the video tape cassette 1, when a recording / reproducing operation is performed, the magnetic tape 4 is unwound from the supply side reel 3 and the information signal recorded on the magnetic tape 4 is reproduced or the information signal is recorded on the magnetic tape 4. Is performed in the recording / reproducing mechanism unit, and then sequentially wound around the winding-side reel 2. Therefore, the video tape cassette 1
The magnetic tape 4 in the state where the recording and reproducing operations are performed.
Is wound around the winding reel 2.

By the way, broadcast digital video tape cassettes such as the D-1 digital video tape cassette and the D-2 digital video tape cassette, which are provided with the magnetic tape 4 having a width of 19.01 mm, are recorded in the cassette body depending on the recording time. There are S cassettes, M cassettes, and L cassettes that have different external shapes. In each of these digital video tape cassettes for broadcasting, the cassette body has a thickness of 33 m.
m has the same specifications, but in the M cassette 1A, the length dimension in the longitudinal direction is 254 mm, the length dimension in the front-rear direction is 150 mm, and in the L cassette 1B, the length dimension in the longitudinal direction is The length dimension in the front-back direction is 366 mm and 206 mm.

Therefore, the M cassette 1A and the L cassette 1B are the supply side reel 3 and the winding side reel 4 respectively.
And the distance and the position are different from each other.
In the example tape evaluation apparatus 100, it is necessary to configure the S cassette winding mechanism differently, and the demand is slightly small. Therefore,
When the S cassette is loaded in the cassette loading unit 11, the tape evaluation apparatus 100 automatically ejects the tape according to the output of the identification sensor.

The tape evaluation apparatus 100 roughly comprises a cassette loading section 11 into which the video tape cassette 1 is loaded, and a loading section which pulls out the magnetic tape 4 from the video tape cassette 1 loaded in the tape cassette loading section to form a running path. A device 50, a magnetic tape cleaning device 40 for removing dust and the like adhering to the magnetic tape 4, and a magnetic tape detection device 45 for detecting a deteriorated state of the magnetic tape 4.
And a magnetic tape winding device 101 of a tape cassette that arranges and winds the magnetic tape 4 on the supply side reel 3.

The tape evaluation apparatus 100 includes a magnetic tape cleaning device 40, a magnetic tape detection device 45, and a magnetic tape winding device for the tape cassette 1 along the winding side reel 2 to the supply side reel 3 in the running path of the magnetic tape. 10
They are arranged in the order of 1. Cassette loading section 11
Has a space that allows mounting of two types of video tape cassettes 1A and 1B having different external specifications described above, and the supply side reel 3 and the winding side reel 2 are provided on the bottom surface.
A reel shaft 20A for driving the supply-side reel 3 and the winding-side reel 2 to rotate by fitting into the reel hole of
20B is provided. In addition, the cassette loading unit 11
Is equipped with a lid opening mechanism whose details are omitted.
When the video tape cassette 1 is loaded, the lid 5 on the front surface is rotated to expose the magnetic tape 4 located on the inner surface side of the lid 5 to the outside.

These reel shafts 20A and 20B are adjusted to predetermined positions by a reel shaft adjusting mechanism 21 whose details are omitted depending on the type of the video tape cassette 1 mounted in the cassette loading section 11, and the video tape cassette 1
Are fitted into the reel holes of the supply side reel 3 and the winding side reel 2, respectively. Further, the reel shafts 20A and 20B are
By a tape drive mechanism (not shown), the supply reel 3 and the take-up reel 2 are rotated in the counterclockwise direction in FIG. 1, and the so-called magnetic tape 4 is rewound on the peripheral surface of the take-up reel 2. I do. Therefore, the reel shafts 20A and 20B form a drive mechanism of the magnetic tape 4.

The magnetic tape 4 is pulled out from the inside of the video tape cassette 1 toward the mechanical section by the loading device 50 to form a running path of the magnetic tape 4. The loading device 50 has the same basic structure as a loading device provided in a known video tape recorder, and roughly includes a loading motor 51 and a first drive mechanism section 52 driven by the loading motor 51. , A ring gear portion 53 that is rotationally driven by the first drive mechanism portion 52, a second drive mechanism portion 54 that is driven by the ring gear portion 53, and is driven by the second drive mechanism portion 54. The first tension arm drive mechanism unit 55 and the second tension arm drive mechanism unit 56, and these first tension arm drive mechanism unit 55
And a first tension arm 57 and a second tension arm 58 which are rotationally moved by the second tension arm drive mechanism section 56.

In the loading device 50, when the loading motor 51 is driven, the ring gear portion 53 is rotationally driven via the first drive mechanism portion 52. The ring gear portion 53 is composed of a first ring gear and a second ring gear that are overlapped with each other, and the first ring gear and the second ring gear are rotationally driven to generate a second drive mechanism. The part 54 is rotationally driven.

The second drive mechanism section 54 rotates to drive the first tension arm drive mechanism section 55 and the second tension arm drive mechanism section 56, respectively. Then, the first tension arm drive mechanism portion 55 and the second tension arm drive mechanism portion 56.
Is rotationally driven to rotationally move each of the first tension arm 57 and the second tension arm 58 laterally to pull the magnetic tape 4 pulled out from the video tape cassette 1 laterally. Magnetic tape 4
A predetermined tension is applied to the inside of the traveling route.

The magnetic tape cleaning device 40 generally includes a second tension arm 58 and a pinch roller 49 for pulling out the magnetic tape 4 from the take-up reel 2 which is the feeding side of the magnetic tape 4 constituting the loading device 50 described above. And a suction guide portion arranged between the pinch roller 49 and the first tension arm 57 for pulling out the magnetic tape 4 from the supply reel 3 on the winding side. Has been done. The magnetic tape cleaning device 40 removes dust and magnetic powder adhering to the surface of the magnetic tape 4 by using air or a sapphire blade, and sucks the removed dust and the like to the outside of the device.

The magnetic tape winding device 101 of the tape cassette 1 is located on the inner peripheral side of the running path of the magnetic tape 4 pulled out from the video tape cassette 1, and the reel 3 on the supply side and the reel 3 on the take-up side. It is arranged so as to correspond to a substantially central portion with respect to 2. The magnetic tape winding device 101 of the embodiment tape cassette is roughly composed of a roller arm 21.
4 and a roller arm 21.
4, a roller arm moving mechanism 107 for moving the roller 4 with respect to the supply reel 3, a slide moving mechanism 106 for moving the roller arm moving mechanism 107 to and from the video tape cassette 1, and a traveling path of the magnetic tape 4. And a vertical movement mechanism portion 105 disposed on the inner peripheral side of the slide movement mechanism portion 106 for raising and lowering the slide movement mechanism portion 106 with respect to the traveling path of the magnetic tape 4 of the video tape cassette 1.

First, the vertical movement mechanism 105 will be described below with reference to FIGS. Vertical movement mechanism unit 1
Reference numeral 05 indicates a support base 116 that is attached to a chassis member of the tape evaluation apparatus 100 (not shown), a vertical movement mechanism 110 provided on the support base 116, and a vertical movement mechanism 110 that moves the raised and lowered positions. Vertical moving base 133 and vertical moving base 1
It is composed of a first screw guide shaft 125, a second screw guide shaft 126, and a guide shaft 129 that support 33 to be vertically movable.

The support base 116 is formed in a substantially rectangular plate shape, and both ends thereof are respectively screwed to the rising side walls of the chassis member of the tape evaluation apparatus 100. The support base 116 includes a vertical movement mechanism 110 on the main surface.
Is provided. The vertical movement mechanism 110 generally includes a vertical movement motor 111, a worm gear 115 that is rotationally driven by the vertical movement motor 111, and a worm wheel 120 that is meshed with the worm gear 115.
And the drive shaft 1 provided with this worm wheel 120
22, a timing belt 123 that is stretched around the drive shaft 122, and a first screw guide shaft 125 and a second screw guide shaft 126 that are stretched around the timing belt 123.

The vertical moving motor 111 is the support base 1
The first connecting member 112 is provided on the motor support portion 116A at one end of the first and second motor 16, and the rotary shaft 111A of the vertical movement motor 111 is provided. The second connecting member 113 is fitted and connected to the first connecting member 112. The second connecting member 113 is provided with a rotating shaft 114 whose axis lines are aligned with the rotating shaft 111A of the vertically moving motor 111.

A worm gear 115 is provided in the middle of the rotary shaft 114, and one end thereof is rotatably supported by a bearing 119. The bearing 119 is disposed on the rotary shaft support portion 116 </ b> B provided on the support base 116, and is covered by the bearing support member 117. Both ends of the bearing support member 117 are fixed to the bearing support portion 116B by mounting screws 118A and 118B.

The worm gear 115 is formed by meshing a worm wheel 120 with a gear provided on the outer peripheral portion. The worm wheel 120 is provided in the middle of the drive shaft 122. The drive shaft 122 is a bearing 121.
It is rotatably supported by A and 121B, and these bearings 121A and 121B are fixed to the support base 116.

A pulley 124 is provided at the upper end of the drive shaft 122, and a timing belt 123 is stretched around a groove formed in the pulley 124. The timing belt 123 is used for the first screw guide shaft 12
5 and the second screw guide shaft 126, and the pulleys 127 and 128 provided on the upper ends of the respective screw guide shafts 126 are respectively stretched.

The guide shaft 1 is attached to the support base 116.
The upper end of 29 is screwed and fixed by mounting screws 136A and 136B. Furthermore, the vertical movement base 13
3 has a guide member 1 at a position corresponding to the guide shaft 129.
30 is provided, and is slidably inserted into the guide hole 130A of the guide member 130. Therefore, the vertical movement base 133 is slidably supported by the guide shaft 129.

The first screw guide shaft 125 and the second screw guide shaft 125
The screw guide shaft 126 is rotatably supported by bearings 131A and 131B provided on the support base 116. The second screw guide shaft 126 is
The lower end is rotatably supported by the bearing 131C. As shown in FIG. 6, the bearing 131C is arranged on the outer peripheral side of the running path of the magnetic tape 4, and the mounting screw 13
It is fixed to the base plate 109 by screws 7A and 137B.

Also, these first screw guide shafts 1
25 and the second screw guide shaft 126 are provided with thread grooves 125A and 126A, respectively, on their outer peripheral portions, and the first guide nut 134 and the second guide nut 135 are respectively provided in these thread grooves 125A and 126A. It is screwed. As shown in FIGS. 7 and 8, the first guide nut 134 and the second guide nut 135 have nut bodies 134A and 135A and a nut body 13 respectively.
Coil spring 155 provided on the outer peripheral portion of 4A, 135A
A first nut support member 156A for supporting the nut bodies 134A, 135A on the first screw guide shaft 125 and the second screw guide shaft 126, and a second nut support member 156A for supporting the nut bodies 134A, 135A on the vertical movement base 133. And a nut support member 156B.

The coil spring 155 has one end in contact with the first nut support member 156A and the other end in contact with the vertical movement base 133. Therefore, the nut bodies 134A and 135A of the first guide nut 134 and the second guide nut 135 are swingably supported by the vertically moving base 133 in a state of floating above the vertically moving base 133 (so-called floating structure). Has been done.

The first screw guide shaft 125 and the second screw guide shaft 126 are screwed into the first screw guide shaft 125 and the first screw guide shaft 126.
The guide nut 134 and the second guide nut 135 are provided with a plurality of gaps with the first screw guide shaft 125 and the second screw guide shaft 126, respectively. That is, the vertical movement base 133 is slidably movable on the first screw guide shaft 125 and the second screw guide shaft 126.
Then, as the first screw guide shaft 126 and the second screw guide shaft 127 are rotationally driven, respectively, the vertical movement base 133 is moved up and down through the first guide nut 134 and the second guide nut 135. Slide to position and to.

The vertical moving base 133 has a first positioning shaft 141 to a fourth positioning shaft 14 on the main surface facing the base plate 109 of the tape evaluation apparatus 100.
4 are provided, and the upper ends of the first positioning shaft 141 to the fourth positioning shaft 144 are fixed. The first positioning shaft 141 to the third positioning shaft 143 have positioning holes 141A, 14A at their lower ends.
2A and 143A are provided respectively. In addition, the first positioning shaft 141 is provided on the base plate 109.
First to third positioning members 145 to 147 are provided at positions corresponding to the to third positioning shafts 143, respectively. These first positioning members 145
The first to third positioning members 147 are integrally provided with the first to third positioning protrusions 145A to 147A.

That is, the vertical movement base 133 is located at the lowered position in which it approaches the base plate 109, and is inserted into the first positioning hole 141A to the third positioning hole 143A of the first positioning shaft 141 to the third positioning shaft 143. ,
First positioning member 145 to third positioning member 14
The first to third positioning protrusions 145A to 147A of the seventh positioning protrusion 145A are respectively inserted to be positioned.

Further, the vertical moving base 133 is brought into contact with an abutting surface portion (not shown) provided on the base plate 109 at the lower position where the vertical moving base 133 approaches the base plate 109. Further, a motor stop member 139 having a substantially L-shaped cross section is provided on an outer peripheral portion of the vertical movement base 133, and a tip portion of the motor stop member 139 is protruded toward the base plate 109 side and fixed by a mounting screw 140.
The base plate 109 is provided with a not-shown descending position sensor at a predetermined position corresponding to the motor stopping member 139, and the motor stopping member 139 blocks the sensor portion provided at this descending position sensor to move the vertically moving motor. The rotation drive of 111 is stopped.

The vertical movement base 133 has a roller arm portion 10 on the side facing the base plate 109.
A slide base 149 provided with 8 is slidably provided. As described above, in the vertical movement mechanism unit 105, in the first screw guide shaft 125 and the second screw guide shaft 126, the vertical movement base 133 has the first guide nut 134 and the second guide nut 13.
It is supported by a floating structure via 5.

Therefore, in the vertical movement mechanism unit 105, for example, even when the first screw guide shaft 125 and the second screw guide shaft 126 are assembled, even if there is some deviation in the parallelism between the shafts, Because of the floating structure described above, it is possible to automatically correct the variation in the axial distance between the first screw guide shaft 125 and the second screw guide shaft 126. That is, the up-and-down movement base 133 is surely moved to the ascending position and the descending position.

Further, the vertical movement mechanism section 105 reduces the movement loss and the positional deviation due to the movement of the vertical movement base 133, and also includes the first screw guide shaft 125 and the second screw guide shaft 126, and the first screw guide shaft 125 and the first screw guide shaft 126. The wear of the threaded portions of the guide nut 134 and the second guide nut 135 is reduced. Next, the slide movement mechanism unit 10
As shown in FIG. 9 to FIG. 12, 6 is a slide base 149 on which the roller arm portion 108 is arranged, and a slide base 149 provided on the vertical movement base 133 and slide-moves with respect to the video tape cassette 1. A first position holding member 167 that fixes the positions of the slide moving mechanism 160 and the slide base 149 that has been slid.
And a second position holding member 168.

The slide base 149 is superposed on the vertically moving base 133, and the roller arm portion 108 is provided on the main surface thereof. The slide base 149 has
The first guide shaft 1 is provided on the sliding surface side with the vertically moving base 133.
63 and a second guide shaft 164 are provided respectively. By the way, the vertical movement base 133 has a first guide slit 161 and a second guide slit 1 on the main surface.
62 are provided. The first guide shaft 163 and the second guide shaft 164 of the slide base 149 are inserted into the first guide slit 161 and the second guide slit 162 of the vertical movement base 133, respectively. That is, the slide base 149 is slidably supported by the vertical movement base 133.

The slide moving mechanism 160 is provided on the vertical moving base 133 and will be described with reference to FIGS. 9 to 11. The slide movement mechanism 160 is roughly composed of a slide movement motor 153 and the slide movement motor 15
3, a drive shaft 150 connected to the drive shaft 150, a first gear 171 provided on the drive shaft 150, a second gear 172 meshed with the first gear 171, and a second gear 1
72, a moving pulley 174 provided via a mounting shaft 173, and a first wire member 175A and a second wire member 175 sandwiching the moving pulley 174.
It is composed of B and.

The slide movement motor 153 is arranged on the base plate 109 facing the slide base 149. The sliding movement motor 153 is provided with a connecting member 152 at the tip of the rotary shaft 153A. The connecting member 152 is provided with a substantially cross-shaped connecting groove. The drive shaft 150 is provided with a connecting pin 151 inserted through a mounting hole 150A formed at the lower end thereof. The drive shaft 150 is connected to the slide movement motor 153 by the connection pin 151 provided at the lower end engaging with the connection groove of the connection member 152 provided on the slide movement motor 153.

The first gear 171 is provided on the upper end portion of the drive shaft 150, and the second gear 172 meshed with the first gear 171 is provided. The second gear 172 is rotatably supported by a support shaft 176. A substantially C-shaped opening 172A is provided on the main surface of the second gear 172, and a circular arc-shaped first detection protrusion 172B and a second detection protrusion 172B are provided at the side ends of the opening 172A. The detection protrusions 172C are integrally formed in parallel with the main surface.

The second gear 172 has an opening 17
A sensor support member 177 for closing 2A is fixedly provided on the support shaft 176. The sensor support member 177 is provided with a first position sensor 178A and a second position sensor 178B at predetermined positions on the side surface of the second gear 172 facing the opening 172A. These first
In the position sensor 178A and the second position sensor 178B, detection grooves corresponding to the first detection protrusion 172B and the second detection protrusion 172C of the second gear 172 are provided, respectively. It is connected to the slide movement motor 153 by a connection wiring (not shown).

Further, in the second gear 172, the mounting shaft 1 is attached to the outer peripheral edge portion on the side facing the vertical moving base 133.
73 is provided so as to project, and a moving pulley 174 is provided on the mounting shaft 173. The moving pulley 174 is provided with a groove along the outer periphery thereof.
Further, the first wire member 175A and the second wire member 175B, which are elastically deformable with the moving pulley 174 interposed therebetween, are possible.
Are provided in parallel with each other. The first wire member 175A and the second wire member 175B are
Both ends are supported by a first position holding member 167 and a second position holding member 168 described later.

The slide moving mechanism 160 is covered with a case member 179. This case member 1
79 has a mounting screw 18 at the end of the vertical movement base 133.
They are fixed by screws 0A, 180B and 180C, respectively. In addition, the slide base 149 has a first
The guide shaft 163 and the second guide shaft 164 are provided upright, and the guide shafts 163 and 164 are provided with the first pulley 165 and the second pulley 166, respectively. These first pulley 165 and second pulley 166
A first position holding member 167 and a second position holding member 168 are provided in each.

The first position holding member 167 and the second position holding member 167
The position holding member 168 is formed in a substantially T-shape using, for example, a plastic material, and has a first pressing member 169A to a third pressing member 169C and a fourth pressing member 169D to a sixth pressing member at each end. Pressure contact members 169F are provided respectively. As shown in FIG. 12, the first pressure contact member 169A to the sixth pressure contact member 169F are provided on a main body portion 169L, a coil spring 169M housed in the main body portion 169L, and one end portion of the coil spring 169M. It is composed of a steel ball 169N.

The main body portion 169L is formed in a substantially bottomed cylinder shape having an opening 169P, and the coil spring 169M is housed in the opening 169P. Coil spring 169M
Is provided with one end abutting on the bottom surface of the opening. The steel ball 169N is housed in the opening by abutting one end of the coil spring 169M on the opening end side of the main body 169L.

Therefore, in the first pressure contact member 169A to the sixth pressure contact member 169F, the steel balls 169N are brought into contact with the main surface of the vertical movement base 133 and pushed into the opening side. The first pressure contact member 169A to the sixth pressure contact member 169F are loaded with elastic force due to elastic deformation of the coil spring 169M when the steel ball 169N is pushed. Therefore, the vertical movement base 133
Are the first pressure contact member 169A through the sixth pressure contact member 169.
Each steel ball 169N of F receives a pressure contact force.

That is, the up-and-down moving base 133 has the first
Since the pressure contact members 169A to 169F receive the pressure contact force, it is possible to reliably prevent the formation of an air layer on the sliding surface with the slide base 149. Therefore, the slide base 149 is the vertical movement base 13
3 is slid in good condition. As described above, the slide movement mechanism unit 106 is provided with the first wire member 175A and the second wire member 175B whose both ends are supported by the first position holding member 167 and the second position holding member 168, respectively. As a result, the elastic force of the first wire member 175A and the second wire member 175B is applied to the slide base 149 that has been slid.

Therefore, the slide movement mechanism 106 is
First wire member 175A and second wire member 175
By the elastic force of B, the slide base 149 that has been slid can be reliably fixed at the moving position. As shown in FIGS. 13 to 15, the roller arm moving mechanism unit 107 is roughly provided on the slide base 149 and moves the roller arm 214, and the circuit board 202 that controls the roller arm moving mechanism 192. And a pressure contact force sensor 193 and an overload sensor 194 connected to the circuit board 202.

The roller arm moving mechanism 192 is roughly composed of a roller arm moving motor 182, a drive shaft 185 connected to the rotary shaft 182A of the roller arm moving motor 182, and a worm gear 187 provided on the drive shaft 185. A first gear 196 meshed with the worm gear 187, and a supporting shaft 195 of the first gear 196.
The second gear 197 provided on the
7, a third gear 199 meshed with the third gear 199, and a fourth gear 200 provided on a support shaft 198 of the third gear 199.
And a gear portion 201 provided on the roller arm and meshed with the fourth gear 200. The roller arm moving motor 182 is screwed and fixed to the mechanism supporting member 190, which is screwed and fixed to the slide base 149 by the mounting screw 191A, by mounting screws 190B and 190C. The roller arm moving motor 182 is provided with a first connecting member 183 at the tip of the rotary shaft 182A.

The first connecting member 183 is connected to the second connecting member 184, and is connected to one end of the drive shaft 185 via the second connecting member 184. The drive shaft 185 is provided with a worm gear 187 on the other end side, and the other end is rotatably supported by a drive shaft support portion 190A provided on the mechanism support member 190. The worm gear 187 is meshed with the first gear 196. The first gear 196 is provided in the middle of the first support shaft 195 rotatably supported by the slide base 149, and the second gear 197 is provided at the tip of the first support shaft 195. Has been.

The second gear 197 meshes with the third gear 199. The third gear 199 is provided at the tip of the second support shaft 198 rotatably supported by the slide base 149, and the fourth gear 200 is provided in the middle of the second support shaft 198. Has been. By the way, a roller arm 21 included in a roller arm portion 108 described later.
4, a gear portion 201 is provided along one side surface portion, and the gear portion 201 and the fourth gear 200 are meshed with each other. Further, the roller arm 214 has a retaining plate 2 that prevents the roller arm 214 from falling off when it is slid to the base end.
04 are provided.

The circuit board 202 is a slide base 149.
Is fixed to the outer peripheral portion of the device by mounting screws 203A and 203B. The circuit board 202 is connected to the pressure contact force sensor 193 and the overload sensor 194 by connection wiring, and is also connected to the roller arm moving motor 182. These pressure contact force sensors 193
The overload sensor 194 has a slide base 1 at the base end.
It is fixed to the screw 49 with screws, and the detection slits are provided in the front end portions respectively. The drive shaft 185 is provided with a pressure contact force detection member 188 and an overload detection member 189 at positions corresponding to the pressure contact force sensor 193 and the overload sensor 194, respectively.

The pressure contact force detecting member 188 is formed in a substantially cylindrical shape with a bottom, and slits are cut out at a plurality of locations on the outer peripheral portion. The pressure contact force detection member 188 is fixed to the drive shaft 185 in a state where the outer peripheral portion is inserted into a detection slit provided in the pressure contact force sensor 193. The pressure contact force sensor 193 detects the number of rotations of the drive shaft 185 when the drive shaft 185 is rotationally driven and the outer peripheral portion of the pressure contact force detection member 188 blocks the detection slit. The pressure contact force sensor 193 controls the rotation speed of the roller arm moving motor 182 based on the detected rotation speed of the drive shaft 185.

Therefore, the pressing force sensor 193 adjusts the moving amount of the roller arm 214 by controlling the rotation speed of the roller arm moving motor 182.
That is, the pressure contact force sensor 193 has the roller arm 214.
Is pressed against the magnetic tape 4 wound around the supply reel 3, by appropriately moving the roller arm 214 in accordance with an increase in the winding diameter of the magnetic tape 4 wound around the supply reel 3. The pressure contact force of the roller arm 214 with respect to the magnetic tape 4 is always kept constant.

The overload detecting member 189 is formed in a substantially cylindrical shape with a bottom, and is slidably supported by the drive shaft 185 with the outer peripheral portion corresponding to the detection slit of the overload sensor 194. Further, the drive shaft 185 is provided with a coil spring 186 between the pressure contact force detection member 188 and the overload detection member 189, and both ends of the coil spring 186 have the pressure contact force detection member 188 and the overload detection member 18 respectively.
9 are in contact with each other.

Therefore, the overload detecting member 189 has
Since the pressure contact force detection member 188 is fixed to the drive shaft 185, it is retracted from the detection slit of the overload sensor 194 by the elastic force of the coil spring 186. Then, the overload detection member 189 is the first when the pressure contact force of the roller arm 214 pressed against the magnetic tape 4 is overloaded.
The worm gear 187 is slidably moved through the gears 196 to 200 of the worm gear 187.
7 slides to the overload sensor 194 side.

The overload detection member 189 is slid so that the outer peripheral portion is inserted into the detection slit of the overload sensor 194. Therefore, the overload sensor 194
Detects an overload generated on the roller arm 214 and immediately stops the rotational driving of the roller arm moving motor 182. As described above, the roller arm moving mechanism unit 10
7, the gear portion 201 is provided on one side surface portion of the roller arm 214, so that the movement amount of the roller arm 214 can be accurately adjusted. Therefore, the roller arm moving mechanism unit 107 moves the roller arm 214 with high accuracy according to the amount of change in the winding diameter of the magnetic tape 4 wound around the supply reel 3. Therefore, the roller arm 214 is constantly pressed against the magnetic tape 4 wound around the supply reel 3 of the video tape cassette 1 with a constant pressing force.

The roller arm moving mechanism 107 is
Since the pressure contact force sensor 193 and the pressure contact force detection member 184 are provided, the rotation speed of the roller arm moving motor 182 is detected. Then, the roller arm moving mechanism unit 1
07 is capable of detecting the pressure contact force of the touch roller 214 with respect to the magnetic tape 4 by detecting the number of rotations of the roller arm moving motor 182. That is, the pressure contact force sensor 193 appropriately controls the movement amount of the roller arm 214 in accordance with the change amount of the winding diameter of the magnetic tape 4 wound around the supply-side reel 3, so that the roller arm is moved relative to the magnetic tape 4. A touch roller 219, which will be described later, is pressed through 214 via a constant pressing force.

Further, the roller arm moving mechanism 107
Since the overload sensor 194 and the overload detection member 189 are provided, when the roller arm 214 pressed against the supply reel 3 is overloaded, the roller arm moving motor 182 is immediately driven to rotate. Stop at. Therefore, the roller arm moving mechanism 107 causes the roller arm 21 to press the touch roller 219 against the magnetic tape 4.
The magnetic tape 4 is surely prevented from being damaged by the overload generated on the magnetic tape 4.

Therefore, the roller arm moving mechanism 10
7 reliably removes an air layer generated between the layers of the magnetic tape 4 wound around the supply-side reel 3 via the touch roller 219, and the magnetic tape 4 is damaged by the pressure contact force of the roller arm 214. Can be reliably prevented. The roller arm portion 108 is shown in FIGS.
9, the roller arm supporting member 205 provided on the slide base 149 and the first bearing 213 respectively provided on the roller arm supporting member 205 are roughly shown.
A to eighth bearings 213H and these first bearings 213
The roller arm 214 is slidably supported by the A to eighth bearings 213H, and the touch roller 219 is rotatably supported by one end of the roller arm 214.

The roller arm support member 205 is located on the inner circumference side of the roller arm 214 and is slid on the outer circumference side of the roller arm 214 and the first roller arm support member 205A arranged on the slide base 149. Base 1
It is composed of a second roller arm support member 205B arranged in 49. First roller arm support member 20
5A has a substantially U-shaped cross section, and has a bottom surface fixed to the slide base 149 with a mounting screw 208. In addition, the first roller arm support member 2
05A is provided with a position adjustment slit 222 on the bottom surface thereof, and the guide pin 223 erected on the slide base 149 is inserted through the position adjustment slit 222.

Then, the first roller arm support member 20
5A is provided with inclined portions 220A and 220B which are orthogonal to each other on a surface portion which faces a roller arm 214 described later. The first roller arm support member 205A has a first bearing mounting hole 211A and a second bearing mounting hole 211B formed at one end of each of the inclined portions 220A and 220B so that their axes are orthogonal to each other. There is.

Further, the first roller arm support member 205
A has a third bearing mounting hole 211C and a fourth bearing mounting hole 211D at the other end of the inclined portions 220A and 220B.
However, the respective axes are formed so as to be orthogonal to each other. The first bearing mounting hole 211A and the third bearing mounting hole 211C described above are provided in the first roller arm support member 2
Each of the inclined portions 220A of 05A is provided on the circumference of the roller arm 214 centering on the center R of curvature. Further, the above-mentioned second bearing mounting hole 211B
The fourth bearing mounting hole 211D is formed in the inclined portion 220B of the first roller arm supporting member 205A at a position on the circumference centered on the center R of curvature of the roller arm 214.

The first roller arm support member 205A is provided with first bearing support shafts 212A through 212D in first bearing mounting holes 211A through fourth bearing mounting holes 211D, respectively. ing. And these 1st bearing support shaft 212A thru | or 4th bearing support shaft 212D
Includes the first washer 221A to the fourth washer 22.
1D is inserted therethrough, and the first bearing 213
A to fourth bearings 213D are rotatably supported.

The second roller arm support member 205B is
It is provided on the slide base 149 via an elastically deformable pressure contact member 207 having an L-shaped cross section. The second roller arm support member 205B is screwed and fixed to one end of the press contact member 207 by mounting screws 209A and 209B, and the other end of the press contact member 207 is screwed to the slide base 149 by mounting screws 210A and 210B. It is fixed and fixed.

Then, the second roller arm supporting member 20
5B is provided with inclined portions 206A and 206B which are orthogonal to each other on a surface portion which faces a roller arm 214 described later. The second roller arm support member 205B is provided with a fifth bearing mounting hole 211E and a sixth bearing mounting hole 211F at one end of each of the inclined portions 206A and 206B, with their axes orthogonal to each other. There is.

In addition, the second roller arm support member 205
B has a seventh bearing mounting hole 211G and an eighth bearing mounting hole 211H at the other end of the inclined portions 206A and 206B.
However, the respective axes are formed so as to be orthogonal to each other. The fifth bearing mounting hole 211E and the seventh bearing mounting hole 211G described above are used for the second roller arm support member 2
Each of the inclined portions 206A of the 05G is provided on the circumference centered on the center R of curvature of the roller arm 214. Further, the above-mentioned sixth bearing mounting hole 211F
The eighth bearing mounting hole 211H is formed in the inclined portion 206B of the second roller arm support member 205B at a position on the circumference centered on the center R of curvature of the roller arm 214.

The second roller arm supporting member 205B is provided with fifth bearing support shafts 212E to 212H in fifth bearing mounting holes 211E to eighth bearing mounting holes 211H, respectively. ing. Then, the fifth bearing support shaft 212E to the eighth bearing support shaft 212H
Includes the fifth washer 221E through the eighth washer 22.
1H are respectively inserted, and the fifth bearing 213
E to eighth bearings 213H are rotatably supported.

The pressure contact member 207 that supports the second roller arm support member 205B is provided with a position adjusting slit 224 on the bottom surface thereof.
Guide pin 225 erected on the slide base 149
Is inserted. The pressure contact member 207 connects the second roller arm support member 205B to the roller arm 21.
A pressure contact force is applied to press contact with No. 4.

As shown in FIG. 18, the roller arm 214 is formed in an arc shape centered on the center of curvature R,
A first sliding surface 214A orthogonal to each other on the inner side surface
And the second sliding surface 214B are integrally provided. Further, the roller arm 214 is integrally provided with a third sliding surface 214C and a third sliding surface 214D which are orthogonal to each other on the outer peripheral side surface portion.

The roller arm 214 has a first
First bearing 2 provided on each of the roller arm supporting member 205A and the second roller arm supporting member 205B.
13A to the eighth bearing 213H, the first sliding surface 214
A to fourth sliding surfaces 214D are slidably supported. Further, the roller arm 214 has a gear portion 20 that meshes with the fourth gear 200 of the roller arm moving mechanism portion 107 described above along the inner peripheral side.
1 is provided. The roller arm 214 rotatably supports the touch roller 219 via a support shaft 226 provided at one end.

As described above, the roller arm portion 108
With the roller arm 214 formed in an arc shape having the center of curvature R as a center, the force line of the pressure contact force applied to the magnetic tape 4 wound around the supply-side reel 3 is changed to the supply-side reel. It becomes the direction of passing the rotation center of 3. Therefore, the roller arm 214 is connected to the supply reel 3
The adverse effects such as tightening and loosening of the magnetic tape 4 wound on the magnetic tape 4 are reduced, and the winding state of the magnetic tape 4 is improved.

Further, since the roller arm 214 is formed in an arc shape, the end side tape provided inside the video tape cassette 1 when the magnetic tape 4 wound on the supply side reel 3 is pressed against the magnetic tape 4. It is possible to maximize the distance between the guide and the inner tape guide and to reduce the moving distance. For this reason, the traveling path of the magnetic tape 4 is set to the loading device 50.
The area extracted by can be reduced.
Therefore, the roller arm 214 can downsize the magnetic tape winding device 101 and the tape evaluation device 100 as a whole.

In the magnetic tape winding device 101 of the tape cassette of the embodiment, the roller arm 214 is adopted as the roller arm portion 108, but it may be replaced with the roller arm 215 shown in FIG. This roller arm 21
Like the roller arm 214, the reference numeral 5 is formed in an arc shape centering on the center of curvature R, and the first sliding surface 215A and the second sliding surface 215B having an arc-shaped cross section are formed on the inner peripheral side surface portion.
Are provided integrally with each other. Further, the roller arm 215 is integrally provided with a third sliding surface 215C and a third sliding surface 215D each having an arc-shaped cross section on the outer peripheral side surface portion.

The roller arm 215 has a first
First bearing 2 provided on each of the roller arm supporting member 205A and the second roller arm supporting member 205B.
13A to the eighth bearing 213H, the first sliding surface 215
The A to fourth sliding surfaces 215D are slidably supported in a point contact state. Further, the roller arm 215 is provided with a gear portion 228 along the inner peripheral side that meshes with the fourth gear 200 of the roller arm moving mechanism portion 107 described above. Further, the roller arm 215 rotatably supports the touch roller 219 via a support shaft 226 provided at one end.

The roller arm unit 108 includes the roller arm 2
By adopting 15, the roller arm 215
Is in point contact with the first roller arm support member 205A.
And is supported by the second roller arm support member 205B. Therefore, in the roller arm 215, slippage of the first sliding surface 215A to the fourth sliding surface 215D accompanying the sliding movement is reduced, and the reliability of the moving operation is improved. In addition, the roller arm 215 includes the first sliding surface 215A to the fourth sliding surface 215D and the first bearing 213A to the eighth bearing.
The wear of the bearings 213H can be prevented.

Further, in the magnetic tape winding device 101 of the embodiment tape cassette, the roller arm 214 is adopted as the roller arm portion 108, but it may be replaced with the roller arm 216 shown in FIG. This roller arm 21
Similar to the roller arm 214, the reference numeral 6 is formed in an arc shape centered on the center of curvature R, and a first sliding protrusion 216A having a substantially rectangular cross section is integrally projected on the side surface portion on the inner peripheral side. Has been. Then, the first sliding protrusion 216A is
The corner portions of the tip end portion respectively form a first sliding portion 216C and a second sliding portion 216D.

Further, the roller arm 216 is provided with a second sliding projection 216B having a rectangular cross section integrally protruding on the side surface on the outer peripheral side. Then, in the second sliding protrusion 216B, the corner portion of the tip portion is the third sliding portion 216.
E and the fourth sliding portion 216F are respectively configured.
The roller arm 216 includes first bearing 213A to eighth bearing 213H provided on the first roller arm supporting member 205A and second roller arm supporting member 205B, respectively, and first sliding surface 216C to the first sliding surface 216C. 4 sliding surface 2
16F are slidably supported in a point contact state.

Further, the roller arm 216 is provided with a gear portion 229 along the inner peripheral side, which meshes with the above-mentioned fourth gear 200 of the roller arm moving mechanism portion 107. Further, the roller arm 216 rotatably supports the touch roller 219 via a support shaft 226 provided at one end. The roller arm unit 108 employs the roller arm 216, so that the roller arm 216 is in point contact with the first roller arm support member 2
05A and the second roller arm support member 205B. Therefore, the roller arm 216 has the first sliding surface 216A to the fourth sliding surface 216 that accompany the sliding movement.
The slippage of D is reduced and the reliability of the moving operation is improved. Further, the roller arm 216 has a first sliding surface 216.
It is possible to prevent wear of the A to fourth sliding surfaces 216D and the first bearing 213A to the eighth bearing 213H, respectively.

As shown in FIG. 22, the touch roller 219 is formed into a substantially cylindrical shape by using, for example, rubber or polyurethane synthetic resin material, and has a support hole rotatably supported by the support shaft 226 of the roller arm 214. 219A is drilled. Further, the touch roller 219 has an axial length dimension smaller than the interval between the upper and lower flange portions of the tape reel, so that the touch roller 219 can enter between the upper and lower flange portions during the winding operation of the video tape 4 described later. It is configured.

The touch roller 219 is formed in an arcuate cross-section with the central part expanded so that the outer peripheral surface gradually decreases in diameter from the substantially central part in the axial direction toward both ends. Specifically, the touch roller 219 has a diameter dimension on the upper end side corresponding to the upper flange side of the tape reel,
It is formed in an arc-shaped cross section, which is slightly larger than the diameter dimension of the lower end side corresponding to the lower flange portion side.

As described above, the touch roller 219, which is formed in an arcuate cross section so that the diameter gradually decreases from the central portion toward both end sides, is directed toward the both end sides from the central portion with respect to the video tape 4. A pressing force that becomes gradually smaller is applied. Therefore, this pressing force does not suddenly change at both end portions of the touch roller 219, and the pressing trace of the touch roller 219 is not formed on the magnetic tape 4.

The configuration of the touch roller 219 whose diameter on the lower end side is large corresponds to the draft of the tape reel hub formed of a synthetic resin material. That is, in the tape reel, since the flange portion side in contact with the reel stand is the reference surface, the draft is gradually reduced in the hub toward the planting flange portion side in consideration of die cutting at the time of molding. It is attached to the direction.

The touch roller 219 exerts a pressing force on the video tape 4 wound on the tape reel, which gradually increases from the lower flange portion side toward the upper flange portion side. Therefore, the video tape 4 wound on the tape reel having the hub with the draft gradually decreasing in diameter from the lower flange portion toward the upper flange portion is applied with a uniform pressing force from the touch roll 219 in the width direction. As a result, the restoring force due to changes over time is uniform over the entire length of the hub.

Further, in the magnetic tape winding device 101 of the embodiment tape cassette, the touch roller is used for the roller arm portion 108, but it may be replaced with the touch roller 230 shown in FIG. Touch roller 230
Is made of, for example, a rubber or polyurethane-based synthetic resin material and has a substantially cylindrical shape.
In order to be rotatably supported by the four support shafts 226, a support hole 230A is formed. Also, this touch roller 2
In the outer peripheral portion of the spiral spiral groove 230C, a spiral groove 230C having a rotation support hole 230A as a central axis is provided as a recess.
It constitutes 30D. The spiral ridge 230D constitutes a tape pressure contact surface portion 230B which is pressed against the video tape 4. The spiral direction of the spiral groove 230C is a direction that guides the video tape 4 toward the upper flange portion side with respect to the running direction of the video tape 4.

Touch roller 23 configured as described above
With 0, the pressing force per unit area can be increased even with a constant pressing force, and the pressing force of the video tape 4 is kept constant while maintaining the pressing force constant over the entire width direction of the wound video tape 4. By pressing on the outer peripheral side of the hub,
The air between the layers is removed to increase the friction coefficient between the layers, and the video tape 4 is wound around the outer peripheral portion of the hub in a uniform winding state. Therefore, the video tape 4 does not cause a phenomenon such as a change in shape at a certain portion in the width direction.

As described above, the roller arm portion 108
Is a roller arm supporting member 205 that slidably supports the roller arm 214, and includes a first roller arm supporting member 205A and a second roller arm supporting member 205B.
When the roller arm 214 is divided into two parts, the roller arm 214 has a cross-sectional shape change due to dimensional tolerance and the shape of the roller arm 214 expands and contracts due to ambient temperature.
It is possible to easily correct shakes and errors that occur when the slide moves.

Further, the roller arm portion 108 has a pressure contact member 207 for supporting the second roller arm support member 205B.
Is provided, the press contact member 207 applies a press contact force to the second roller arm support member 205B. That is, the pressure contact member 207 applies a predetermined pressure contact force in a direction orthogonal to the longitudinal direction of the roller arm 214 to support the roller bearing 214, and thus the first bearing 213A.
Since the pressure contact force is applied to the eighth bearing 213H in advance, the stability of the moving operation of the roller arm 214 is improved. Therefore, the roller arm unit 108 does not need to use a highly accurate bearing, which reduces the manufacturing cost.

In the magnetic tape winding device 101 of the tape cassette constructed as described above, the vertical moving mechanism 1
05, the slide moving mechanism 106 and the roller arm moving mechanism 107 will be described. First,
The up-and-down moving mechanism unit 105 has a standby position at a raised position retracted from the base plate 109, and after the magnetic tape 4 is pulled out to form a traveling path of the magnetic tape 4,
The vertical movement motor 111 is rotationally driven to move the vertical movement base 133 to the lowered position.

The vertical movement motor 111 is rotationally driven to rotationally drive the first connecting member 112 provided on the rotary shaft 111A. First connecting member 112
Is driven to rotate, so that the second connecting member 11
3 is driven to rotate. The second connecting member 113 is rotationally driven to rotationally drive the rotating shaft 114.

The rotating shaft 114 rotates to drive the worm gear 115 to rotate. The worm gear 115 rotates to drive the worm wheel 120 to rotate. Worm wheel 120
The drive shaft 122 is rotationally driven by rotating. When the drive shaft 122 rotates, the drive shaft 122 rotates the timing belt 123 via the pulley 124 provided at the upper end. Timing belt 123
Rotates to drive the first screw guide shaft 125 and the second screw guide shaft 126 to rotate via the pulleys 127 and 128, respectively.

The first screw guide shaft 125 and the second screw guide shaft 125
The screw guide shaft 126 is rotationally driven to rotationally move the first guide nut 134 and the second guide nut 135. First guide nut 13
The fourth and second guide nuts 135 rotate and move to move the vertical guide base 133 to which the first guide nut 134 and the second guide nut 135 are fixed.
Is moved to the lowered position along the guide shaft 129.

The vertical movement base 133 moves to the lowered position, and the motor stop member 1 provided on the outer peripheral portion thereof.
Reference numeral 39 blocks the sensor portion of the descent position sensor (not shown). In the descending position sensor, the motor stop member 139 provided on the up-and-down moving base 133 blocks the sensor portion, so that the up-and-down moving motor 111 is stopped from rotating. Therefore, the movement of the vertical movement base 133 is stopped, and the first positioning shaft 141 to the third positioning shaft 143 provided on the vertical movement base 133 are moved to the first positioning member 145 to the third positioning member 145. Abut the member 147.

The first positioning shaft 141 to the third positioning shaft 143 are brought into contact with the first positioning member 145 to the third positioning member 147, so that the first positioning hole 141A to the third positioning hole 143A. First positioning protrusion 145A to third positioning protrusion 147A
Are inserted respectively. Therefore, the vertical movement base 1
33, the first positioning protrusion 145A to the third positioning protrusion 147A are inserted into the first positioning hole 141A to the third positioning shaft 143A, respectively, so that the lowered position is reliably positioned.

When the vertically moving base 133 moves to the lowered position, the fourth positioning shaft 144 comes into contact with an abutting surface (not shown) provided on the base plate 109. Therefore, the vertical movement base 133 is surely positioned at the lowered position, that is, the vertical movement base 13.
3, the roller arm portion 108 provided on the slide base 149 superposed on the vertically moving base 133 is moved to the position corresponding to the magnetic tape 4 wound on the supply side reel 3 by moving to the lowered position. Be moved.

Next, in the slide moving mechanism 106, as shown in FIG. 10, the first position where the slide base 149 corresponds to the M cassette 1A is the reference position. The slide movement mechanism unit 106 moves the slide base 149 from the first position to the second position approaching the L cassette 1B in order to correspond to the L cassette 1B. The slide movement mechanism unit 106 moves the vertical movement base 133 to the lower position by the above-described vertical movement mechanism unit 105, so that the drive shaft 150 provided on the vertical movement base 133.
The connecting pin 151 of is engaged with and connected to the connecting groove 152A of the connecting member 152 of the motor 153 for sliding movement.

Then, the slide moving mechanism 106 rotates the connecting member 152 by rotating the slide moving motor 153. Connecting member 152
Is rotated so that the slide moving mechanism 16
The drive shaft 150 of 0 is driven to rotate. The drive shaft 150 is
By the rotation operation, the first gear 171 provided on the upper end portion is rotationally driven. The first gear 171 rotates to drive the second gear 172 to rotate. The second gear 172 rotates to move the moving pulley 174.

The groove portion of the moving pulley 174 comes into contact with the first wire member 175A and the second wire member 175B as the pulley 174 rotates, so that the first wire member 175A and the second wire member 175A. Move 175B. First wire member 175A and second wire member 1
The 75B moves to move the first position holding member 167 and the second position holding member 16 provided at both ends.
Move 8

The first position holding member 167 and the second position holding member 168 move to move the first guide shaft 163 and the second guide shaft 164. Then, the slide base 149 has the first guide shaft 163.
And the second guide shaft 164 corresponds to the first guide slit 1
By moving along 61 and the 2nd guide slit 162, it is moved to the 2nd position corresponding to the L cassette 1B shown in FIG.

Further, the second gear 172 is rotationally moved so that the first detection projection 172B provided in the opening 172A is inserted into the groove formed in the first position sensor 178A. To be done. Therefore, the first position sensor 178A stops the rotation operation of the slide movement motor 153. Further, the moving pulley 174 has a second groove in the groove portion when the slide base 149 is moved to the second position.
Is engaged with an engaging portion provided on the wire member 175B. Then, the slide base 149 slid to the second position causes the first position holding member 167 and the second position holding member 168 to be subjected to the elastic force of the first wire member 175A, so that the position shift occurs. It is securely fixed without doing.

The roller arm moving mechanism 107 rotationally drives the roller arm moving motor 182 when the roller arm 214 is pressed against the video tape 4 wound around the supply reel 3. Roller arm moving motor 18
2 rotates to rotate the rotating shaft 182A to rotate the first connecting member 183. First
The connecting member 183 of (1) rotates to drive the second connecting member 184 by rotation. Second connecting member 184
Drives the drive shaft 185 to rotate by rotating. The drive shaft 185 rotationally drives the worm gear 187 to rotate.

The worm gear 187 rotates to drive the first gear 196 to rotate. By rotating the first gear 196, the first support shaft 195 provided with the first gear 196 is rotationally driven. By rotating the first support shaft 195,
The second gear 196 provided at the tip of the first support shaft 195 is rotationally driven.

The second gear 196 rotationally drives the third gear 199 by rotating. Third gear 1
By rotating the 99, the third gear 1
The second support shaft 198 provided with 99 is rotationally driven.
The second support shaft 198 is rotated so that the fourth gear 20 provided in the middle of the second support shaft 198.
0 is driven to rotate.

By rotating the fourth gear 200, the roller arm 214 provided with the gear portion 201 meshed with the fourth gear 200 is moved.
That is, the roller arm 214 is moved via the worm gear 187 and the first gear 196 to the fourth gear 200 by the rotation operation of the roller arm moving motor 182.

The magnetic tape winding device for a tape cassette according to this embodiment is the same as the roller arms 214, 2 described above.
Any of the 15, 216 and touch rollers 219, 230 may be replaced and adopted.

[0120]

As described in detail above, according to the touch roller of the magnetic tape winding device according to the present invention, it is formed in an arc shape so that the diameter dimension gradually becomes smaller from the central portion toward both ends. By doing so, the pressing force against the magnetic tape does not gradually decrease toward both ends and does not cause a sudden change, so that the magnetic tape is aligned on the tape reel without forming a pressing mark of the touch roller. It will be rolled.

Further, according to the touch roller of the magnetic tape winding device of the present invention, since the diameter is gradually increased toward the upper end side, the magnetic tape is wound on the tape reel. Since a pressing force that gradually increases from the lower flange side toward the upper flange side is applied, the tape with a draft that gradually decreases in diameter from the lower flange side to the upper flange side is applied to the hub. The magnetic tape wound on the reel is subjected to a uniform pressing force in the width direction from the touch roller, and the restoring force due to aging becomes uniform over the entire length of the hub, causing damage on the lower flange side. There is no inconvenience.

Further, according to the touch roller of the magnetic tape winding device of the present invention, the spiral convex shape formed on the outer peripheral portion is spread over the entire width direction of the magnetic tape to be wound.
By making the surface pressure per unit area large and pressing this magnetic tape to the outer peripheral side of the hub, the magnetic tape is
The air between layers can be reliably removed, the coefficient of friction between layers is increased, and the hub is wound around the outer circumference of the hub in a uniform winding state, and there is also the phenomenon that shape changes occur at certain parts in the width direction. There is no.

[Brief description of drawings]

FIG. 1 is a plan view showing a tape evaluation device in which a magnetic tape winding device of a tape cassette according to an embodiment of the present invention is adopted.

FIG. 2 is a plan view showing a loading device of the tape evaluation apparatus.

FIG. 3 is a plan view showing an up-and-down moving mechanism portion which constitutes a magnetic tape winding device of the tape cassette.

FIG. 4 is a partial cross-sectional side view shown for explaining an ascending position of an up-and-down moving mechanism portion that constitutes the magnetic tape winding device of the tape cassette.

FIG. 5 is a partial cross-sectional side view shown for explaining a lowered position of an up-and-down moving mechanism portion which constitutes a magnetic tape winding device of the tape cassette.

FIG. 6 is a plan view shown for explaining a state in which an up-and-down moving mechanism portion which constitutes a magnetic tape winding device of the tape cassette is supported.

FIG. 7 is a plan view shown for explaining an up-and-down moving mechanism portion which constitutes a magnetic tape winding device of the tape cassette.

FIG. 8 is a vertical cross-sectional view shown for explaining an up-and-down moving mechanism portion which constitutes a magnetic tape winding device of the tape cassette.

FIG. 9 is a plan view showing a slide movement mechanism portion which constitutes a magnetic tape winding device of the tape cassette.

FIG. 10 is a plan view showing a slide movement mechanism portion which constitutes the magnetic tape winding device of the tape cassette.

FIG. 11 is a vertical cross-sectional view showing a slide moving mechanism portion which constitutes the magnetic tape winding device of the tape cassette.

FIG. 12 is a vertical cross-sectional view shown for explaining a pressure contact member of a slide movement mechanism section that constitutes the magnetic tape winding device of the tape cassette.

FIG. 13 is a perspective plan view showing a roller arm moving mechanism portion which constitutes the magnetic tape winding device of the tape cassette.

FIG. 14 is a perspective plan view showing a roller arm moving mechanism portion which constitutes the magnetic tape winding device of the tape cassette.

FIG. 15 is a perspective side view showing a roller arm moving mechanism portion which constitutes the magnetic tape winding device of the tape cassette.

FIG. 16 is a plan view showing a roller arm portion which constitutes the magnetic tape winding device of the tape cassette.

FIG. 17 is a plan view showing a roller arm portion which constitutes the magnetic tape winding device of the tape cassette.

FIG. 18 is a plan view showing a roller arm portion which constitutes the magnetic tape winding device of the tape cassette.

FIG. 19 is a vertical cross-sectional view showing a roller arm portion which constitutes the magnetic tape winding device of the tape cassette.

FIG. 20 is a vertical cross-sectional view showing a roller arm portion which constitutes the magnetic tape winding device of the tape cassette.

FIG. 21 is a vertical cross-sectional view showing a roller arm portion that constitutes the magnetic tape winding device of the tape cassette.

FIG. 22 is a side view showing a touch roller of a roller arm portion which constitutes the magnetic tape winding device of the tape cassette.

FIG. 23 is a side view showing a touch roller of a roller arm portion that constitutes the magnetic tape winding device of the tape cassette.

FIG. 24 is a schematic cross-sectional view shown for explaining the touch roller of the roller arm portion that constitutes the magnetic tape winding device of the tape cassette.

[Explanation of symbols]

 1 Video Tape Cassette 100 Tape Evaluation Device 101 Magnetic Tape Unwinding Device for Tape Cassette 105 Vertical Movement Mechanism Unit 106 Slide Movement Mechanism Unit 107 Roller Arm Movement Mechanism Unit 108 Roller Arm Unit 133 Vertical Movement Base 149 Slide Base 188 Pressure Contact Force Detection Member 189 Overload detection member 193 Pressure contact force sensor 194 Overload sensor 205 Roller arm support member 215 Roller arm 219 Touch roller

Claims (4)

[Claims] 1. A tape in which a pair of tape reels each comprising a hub and upper and lower flange portions integrally connected to upper and lower side surfaces of the hub are rotatably housed and a magnetic tape is hung between the tape reels. A touch roller provided in a magnetic tape winding device that allows a magnetic tape pulled out from one tape reel side of a cassette to be wound around the other tape reel side in a uniform winding state. By making the length of the magnetic tape slightly smaller than the facing distance between the upper and lower flange portions, the magnetic tape that enters between the upper and lower flange portions and is wound around the outer peripheral portion of the hub is pressure-welded over substantially the entire width direction. It is formed in a cylindrical shape that is possible, and the outer peripheral surface is formed in an arc shape in cross section so that the diameter gradually decreases from the substantially central portion in the axial direction toward both end sides. Touch roller of the magnetic tape Seimaki apparatus characterized by that. 2. The touch roller is configured such that the diameter dimension of a portion corresponding to the upper flange portion side of the tape reel is larger than the diameter dimension of the portion corresponding to the lower flange portion side. Item 2. A touch roller of the magnetic tape winding device according to Item 1. 3. A tape in which a pair of tape reels each comprising a hub and upper and lower flange portions integrally connected to upper and lower side surfaces of the hub are rotatably accommodated and a magnetic tape is hung between the tape reels. A touch roller provided in a magnetic tape winding device that allows a magnetic tape pulled out from one tape reel side of a cassette to be wound around the other tape reel side in a uniform winding state. By making the length of the magnetic tape slightly smaller than the facing distance between the upper and lower flange portions, the magnetic tape that enters between the upper and lower flange portions and is wound around the outer peripheral portion of the hub is pressure-welded over substantially the entire width direction. A touch roller for a magnetic tape winding device, wherein the touch roller is formed into a cylindrical shape that is possible and a spiral convex shape is integrally formed on the outer peripheral surface. 4. The spiral convex shape integrally formed on the outer peripheral surface of the touch roller is formed as a spiral convex shape in the direction of guiding the magnetic tape to the upper flange portion side of the tape reel with respect to the running direction of the magnetic tape. The touch roller of the magnetic tape winding device according to claim 3, wherein the touch roller is provided.