JPH0727709B2 - Magnetic tape winding method and device - Google Patents

Description

The present invention relates to a method and device for winding a magnetic tape,
In particular, it relates to a magnetic tape winding method and apparatus for winding a flangeless type tape winding body such as an audio tape cassette or a digital audio cassette.

(Prior Art) In the manufacturing process of audio tape cassettes and digital audio tape cassettes, as an intermediate step, a long length of magnetic tape roll is rolled into a small length flange-less type tape winding body such as a reel or a hub. There is a process of winding up the magnetic tape.

When the magnetic tape is wound around the tape winding body in this winding step, for example, the physical properties of the raw material of the magnetic tape on the delivery side or the physical properties of the tape winding body on the winding side, and further the magnetic tape Depending on the physical properties of itself, so-called tape behavior such as vibration in the tape thickness direction and vibration in the width direction changes during winding, causing a problem of the winding appearance (winding state) of the wound magnetic tape. That is, winding disorder occurs in which the winding surface (tape edge) when observed from the axial direction of the tape wound body becomes uneven. In particular, this tendency becomes stronger as the tape running speed during winding is higher.

The magnetic tape in which the winding is disturbed as described above, for example, in the state of a product stored in a magnetic tape cassette has a poor appearance and is likely to cause winding of the tape or damage to the tape end to cause various troubles. There is also a problem that the electromagnetic conversion characteristics are deteriorated.

For this reason, in the conventional magnetic tape manufacturing process, an inspection such as visual inspection is performed after the winding process so as to check all the winding shapes, and the cost and time required for this are large in the magnetic tape manufacturing process. It was a neck.

Further, in order to reduce the inspection load, in order to improve the winding shape, in winding a magnetic tape having a low yield rate, the open winding method shown in FIG.
A method called cap makeup roll is adopted.

FIG. 7 is a schematic perspective view showing the periphery of the tape winding body 2 on the winding side.

In the case of the one shown in FIG. 7, the winding shaft 4 and the winding shaft 4
A flangeless type tape winding body is mounted on the rotary table 14 integrated with the cap 15 mounted on the upper edge thereof.
Is a method of winding the magnetic tape T onto the tape winding body while biasing the magnetic tape T to the rotary table side according to the weight of the tape T.
Can be wound up in a neat winding pattern with both edges of the tape aligned. However, in the case of this open winding method, there is a step of assembling the tape winding body around which the magnetic tape T is wound in the cassette case, and therefore the risk of tape damage is high,
Furthermore, the cassette assembly was also not good. Therefore, in addition to the open winding method in which the product is completed by inserting it into the cassette after performing the makeup winding, as another method, a magnetic tape is wound in the final stage of the cassette assembly process, so-called, In-cassette winding or C-0
There are methods called winding and V-0 winding.

In this system, as shown in FIG. 8, all parts other than the magnetic tape are assembled in advance in the cassette 8, and the tape winding body on the sending side and the tape winding body on the winding side which are connected by the leader tape 10 are inserted and screwed. The leader tape is pulled out by a winding device called an in-cassette winder onto a work (usually referred to as V-0, C-0, etc.) that has been tightened, and the magnetic tape is then wound around the leader tape on one side. The tip of the tape is joined, and the other leader tape is held by the suction member 16, the tape winding body 2 on the joined side is rotated, the magnetic tape T of a predetermined length is wound and cut, and finally. This is a cassette tape winding method in which the end of the wound magnetic tape T and the other leader tape 10 are joined to complete a product. Although this in-cassette winding method is excellent in productivity, it is impossible to come into contact with the magnetic tape as in the case of the cap makeup winding described above. The shape of the roll is extremely poor because it cannot be controlled at all due to variations in In particular, when the tape winding body is a flangeless type, it is very difficult to arrange the winding shape.

Therefore, the applicant of the present invention has filed a patent application in order to solve the above problems.
As described in the specification of No. 62-034660, when the in-cassette winding of a magnetic tape cassette having a pair of flangeless type hubs and having a friction sheet is performed, pressurized air is sent into the cassette case. As a result, the friction sheet was pressed against the edge of the magnetic tape, and the tape behavior was suppressed, resulting in a dramatically improved winding shape.

(Problems to be Solved by the Invention) However, in the winding method, a new problem has arisen due to the pressurized air fed into the cassette case.
That is, it was found that the dust blown out of the cassette case by the pressurized air deteriorates the cleanliness of the room, and the dust blown off adheres to the magnetic tape to deteriorate the electromagnetic conversion characteristics. It was

Then, the objective of this invention is made in view of the said problem, and in an in-cassette winding system, while improving the winding appearance, the magnetic tape which can maintain the cleanliness inside a cassette case and a room favorable. A winding method and device are provided.

(Means for Solving the Problems) The above object of the present invention is to provide a cassette case containing a pair of flangeless type tape winding bodies connected by a leader tape and at least one friction sheet in contact with the tape edge. In the method of winding the magnetic tape on
At the time of winding the magnetic tape by rotating the tape winding body, pressurized air is sent into the cassette case, and the friction sheet is pressed against the tape edge by the pressurized air. A method of winding a magnetic tape, characterized in that the pressurized air discharged is sucked in the vicinity of the cassette case and wound, and a device enabling the method, that is, a pair of flangeless members connected by a leader tape. In a magnetic tape winding device for winding a magnetic tape on a cassette case containing a tape winding body of a type and at least one friction sheet in contact with an edge of the tape, the inside of the cassette case from a reel shaft insertion hole of at least one of the cassette cases. Means for feeding pressurized air to the Is achieved by a magnetic tape winding device, characterized in that said an air suction means for sucking the pressurized air.

(Embodiment) Hereinafter, an embodiment of the device of the present invention will be described with reference to the drawings.

1 and 2 are a schematic front view and a side view from the direction of arrow A of an embodiment of a magnetic tape winding device of an in-cassette winding system. The winding device 1 finishes a product in which a magnetic tape T is later wound around a pair of tape winding bodies 2 and 3 (hereinafter, simply referred to as "hub") which are previously stored in a case of a digital audio tape cassette, for example. It is used in the method.

The schematic operation of the winding device 1 will be described below. The cassette case 8 containing the hubs 2 and 3 connected by the leader tape 10 having a predetermined length is loaded in the cassette holder 20 of the winding device 1. The cassette holder 20 has substantially the same structure as a basket for a cassette case of a recording / reproducing apparatus. For example, as shown in FIG. 3, the cassette case 8 is a box-shaped cassette holder 20 which opens vertically from the upper side in the drawing. When inserted into the holder, it is held in the holder by a locking member 21 provided at a proper position on the lower end of the holder. At this time, the guard panel 8a closing the cassette front opening of the cassette case 8 is rotatably unlocked. That is,
A slide guard 8b slidably provided on the bottom surface of the cassette case 8 and also serving as a guard panel opening preventing action.
Has slid to the rear of the cassette when the cassette case 8 is inserted.

After that, the cassette holder 20 supported by, for example, four slide shafts 23 is moved toward the front panel 1a (in the direction of arrow B) by, for example, two air cylinders 24, so that the reel shaft insertion port 8c of the cassette case 8 is inserted. The drive shaft 4 and the shaft 5 are inserted into the hubs 2 and 3 from. At this time, for example, the guard panel 8a is pushed up and opened by the guard panel rotation lever 22 fixed to the front panel 1a so as to correspond appropriately to the guard panel 8a, and the hubs 2, 3
The leader tape 10 that is connected to is exposed.

After that, the leader tape 10 is cut almost in its center,
The end of the hub 2 side and the magnetic tape material 6 that was previously installed
Is joined to the tip of the tape with a joining tape or the like. Then, the magnetic tape T wound on the hub 2 for a predetermined length is cut, and then the end thereof is joined to the leader tape 10 on one hub 3 side.

Further, cutting and joining of the leader tape 10 and the magnetic tape T and joining of the leader tape 10 and the magnetic tape T are performed by cutting and joining means 9 provided with holding members 10a and 10b at the tape end portions, a cutter joining tape for cutting and the like. Further, the magnetic tape T sent from the original tape 6 is wound around the hub 2 through a path system including guide pins and guide rolls.

Then, after the magnetic tape T is joined to the leader tape 10 on the hub 3 side to finish the desired winding, the cassette holder
20 is an air cylinder 24, which is in the C direction in the figure (opposite to the B direction)
Move to. By this movement, the engagement between the drive shaft 4 and the hub 2 and the engagement between the shaft 5 and the hub 3 are released, and the guard panel 8a closes the cassette front opening again. After that, the locking member 21 holding the cassette case 8 is moved so as to retract to the back side of the cassette holder,
The cassette case 8 is taken out from below the holder.

The cutting and joining means 9 is omitted in FIGS. 2 and 3.

Although it is the same as the conventional device within the above range, the structure and operation of the characteristic portion of one embodiment of the present invention will be described below with reference to FIGS. 4 and 5. In FIGS. 4 and 5, the cassette holder 20, the cutting and joining means 9 and the like described above are omitted for convenience. FIG. 4 shows that the drive shafts 4 and 5 inserted into the hubs 2 and 3 in the cassette case 8 wind the magnetic tape by rotating the hubs 2 and 3 by a driving means such as a motor (not shown). It is a schematic perspective view showing. The shaft 5 is hollow, and is connected at one end to a pipe 30 connected to, for example, a pressure pump (not shown), and constitutes a pressurized air supply means for feeding pressurized air into the cassette case 8. There is. A well-known rotary joint or the like may be provided on the drive shaft 4 and the shaft 5 so that the hub can be rotated while appropriately feeding pressurized air. Also, the cassette case 8
A suction member 25 is disposed in front of the. The suction member 25
Is formed hollow and has an opening 28 facing the tape outlet 29 on the front surface of the cassette case 8. The opening 28 is connected by a nozzle 26 to a pipe 27, one end of which is connected to, for example, a decompression pump (not shown), and serves as an air suction means for sucking air discharged from a tape outlet 29 on the front surface of the cassette case 8. I am configuring.

When the air is blown into the cassette case 8 by the pressurized air supply means, the air discharged from the tip of the shaft 5 first hits the upper wall surface of the case inner wall facing the tip of the shaft 5, and the friction on the upper side along the upper wall surface. It spreads in all directions inside the seat 11 (between the wall surface and the friction seat 11). At this time, since the upper friction case 11 has flexibility, it is pressed by pressurized air so as to be curved inward as appropriate. The air flowing along the upper wall surface flows along the side wall surface of the cassette case 8 and then along the bottom wall surface, and the lower friction sheet 12 is transferred to the upper friction sheet 11 in the same manner as the upper friction sheet 11. It is pressed inward and goes out of the case from the tape outlet 29 on the front face of the cassette case 8.

Then, the air discharged from the tape outlet 29 is sucked through the opening 28 by the air suction means, and is discharged to the outside of the room through the pipe 27. Further, the sucked air may be discharged into the room after removing dust and the like in the air by an air purifying device such as an air filter.

As described above, when the drive shaft 4 is rotated to wind the magnetic tape T while the upper and lower friction sheets 11 and 12 are pressed inward by the pressurized air, the magnetic tape is wound around the hub 2. Since T is wound such that its upper and lower edges are sandwiched between both friction sheets 11 and 12 by an appropriate force, the winding position and winding shape of the magnetic tape T on the hub 2 are extremely good. Moreover, the pressurized air can blow dusts in the cassette case 8 and foreign matters such as magnetic powder adhered to the tape to the outside of the cassette case, so that the inside of the cassette case can be kept clean. Further, since the dust-containing air discharged from the tape outlet 29 is discharged outside the room by the suction means or purified by the air purifying device and discharged into the room, the cleanliness of the room is deteriorated and the dust-containing air is discharged. Will not be sent into the cassette case.

The pressure of the pressurized air and the amount of air blown are not particularly limited, and for example, tape winding speed, friction sheet, etc.
The thickness can be appropriately set according to various conditions such as the thickness of 11, 12 and the hardness, lubricity, and the internal structure of the cassette case. Further, the suction amount of the suction means can be appropriately set so as not to interfere with the bending action of the friction sheet.

Further, if the exhaust air is sucked from a plurality of places by providing nozzles at a plurality of places of the suction member 25, the suction efficiency can be further enhanced.

In the present invention, the suction member does not necessarily have to be provided so as to face the front surface of the cassette case, and the arrangement can be appropriately changed so as not to hinder the operation of the cassette holder, the cutting and joining means, and the like.

Although the above embodiment has been described with respect to a digital audio tape cassette, the present invention is, of course, applicable to a Philips type audio tape cassette as described at the beginning, and the present invention is based on various aspects based on the gist of the present invention. It goes without saying that the above can be modified.

Examples of the present invention will be described below.

(Example) As a magnetic tape cassette, a digital audio tape cassette was used to perform in-cassette winding having a suction structure as shown in FIG. 4, and the amount of dust generated near the tape outlet was measured. Results are shown in FIG.

In the above example, the upper friction sheet is made of polyethylene terephthalate and has a thickness of 50 μm.
The friction case on the lower side is made of ultra-high molecular weight polyethylene and has a thickness of 80 μm. The blowing pressure of the compressed air is 1.5 kgf / cm ^2, and the suction pressure of the suction means is
The tape speed was set to 5 kgf / cm ² and the tape speed was set to 10 m / s.

As a measuring method, the magnetic tape winding device of the present invention was brought into a clean room (cleanliness class 1000), and a dust measuring nozzle was installed near the tape outlet 29 shown in FIG. Then, the dust during the winding of the magnetic tape T was constantly counted, and the dust with and without suction was measured 10 times in total.

As is apparent from FIG. 6, in the magnetic tape winding device equipped with the suction device according to the present invention, the amount of dust generated in the vicinity of the cassette tape case is extremely reduced.

(Effects of the Invention) As described above, according to the present invention, when performing in-cassette winding of a magnetic tape cassette having a pair of flangeless hubs and including a friction sheet,
By sending pressurized air into the cassette case, the friction sheet is pressed against the edge of the magnetic tape, so it is possible to suppress the behavior of the data and obtain a dramatically improved winding shape. Foreign matter such as dust in the cassette case is blown to the outside of the cassette case, and the pressurized air discharged from the cassette case is sucked by the suction means and discharged to the outside or cleaned, so that the cleanliness of the room is deteriorated, It is possible to prevent air having dust from being sent into the cassette case.

Therefore, it is possible to obtain a magnetic tape cassette in which the winding of the tape and the damage of the tape end are less likely to occur and various troubles are small, and the electromagnetic conversion characteristics are good.

[Brief description of drawings]

FIG. 1 is a schematic front view of an embodiment of the winding device of the present invention, FIG. 2 is a schematic side view seen from the direction A in FIG. 1, and FIG. 3 is a cassette holder and a magnetic tape cassette shown in FIG. FIG. 4 is an enlarged perspective view of FIG. 4, FIG. 4 and FIG. 5 are perspective views and cross-sectional views of main parts of the apparatus shown in FIG. 1 and FIG. 2, and FIG. Distribution chart showing the results,
FIG. 7 is a partial perspective view showing a conventional open winding system, and FIG. 8 is a schematic plan view showing a conventional in-cassette winding system. (Symbols in the figure) 1 ... Winding device 2, 3 ... Tape winding body (hub) 4 ... Drive shaft, 5 ... Shaft 6 ... Original fabric, 8 ... Cassette case 8a ... Guard panel , 8b …… Slide guard 8c …… Reel shaft insertion hole 9 …… Cutting and joining means, 10 …… Leader tape 10a, 10b …… Holding member 11,12 …… Friction sheet 14 …… Rotary table, 15 …… Cap 16 …… Suction member, 20 …… Cassette holder 21 …… Locking member 22 …… Guard panel rotation lever 23 …… Slide shaft, 24 …… Air cylinder 25 …… Suction member, 26 …… Nozzle 27,30 …… Pipe, 28 …… Opening 29 …… Tape outlet

Claims (2)

[Claims] 1. A method of winding a magnetic tape in a cassette case containing a pair of flangeless type tape winding bodies connected by a leader tape and at least one friction sheet in contact with a tape edge, the tape winding method comprising: When the magnetic tape is wound by rotating the packaging body, pressurized air is sent into the cassette case, and the friction sheet is pressed against the tape edge by the pressurized air and discharged from the cassette case. A method of winding a magnetic tape, wherein the pressurized air is taken up while being sucked in the vicinity of the cassette case. 2. A magnetic tape winding device for winding a magnetic tape on a cassette case containing a pair of flangeless type tape winding bodies connected by a leader tape and at least one friction sheet in contact with the edge of the tape. And a pressurized air supply means for feeding pressurized air into the case from at least one reel shaft insertion hole of the cassette case, and an air suction means for sucking the pressurized air discharged from the front of the cassette case. A magnetic tape winding device characterized by the above.