JPH05314729A - Splicing device - Google Patents

Abstract

PURPOSE:To enable coupled members bonded by an adhesive tape to move in a narrow space immediately after bonding. CONSTITUTION:In the splicing device for cutting the adherently held adhesive tape 3a by passing a cutting blade through a slit 7 of a rotary drum 5 which is intermittently rotated by a rotating means 10 and bonding the coupled members under pressurized contact, the rotary drum 5 is intermittently rotated by the rotating means 10 in order to press the adhesive tape 3a in the vicinity of the side of the slit in the rotating direction of the rotary drum as the center. Then, the cross-sectional shape of the rotary drum 5 is approximately polygonal, where the slit 7 is provided on each vertex, and each side of the approximate polygon in the vicinity of the opposite side of the slit 7 in the rotating direction of the rotary drum 5 is formed to be curved or approximately straight line to the slit 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a splicing device for joining two members to be joined by supplying an adhesive tape on the boundary between the two members to be joined, and more particularly to a splicing device for joining a magnetic tape and a leader tape. The present invention relates to a splicing device that winds a magnetic tape in a cassette.

[0002]

2. Description of the Related Art A winding device is used for producing a cassette on which a magnetic tape is wound. In this device, a leader tape previously locked to a pair of hubs in a cassette is pulled out from the cassette and cut, and one of the cut ends is joined to a long magnetic tape wound on a reel to form a hub. Rotate to wind the magnetic tape in the cassette.

After winding a predetermined amount of magnetic tape, the magnetic tape is cut, the cut end is joined to the other end of the leader tape, and finally the magnetic tape is in a state of being ejected from the cassette. Complete by winding the tape and the leader tape into the cassette.

In this winding device, a splicing device is used when joining the magnetic tape and the leader tape. This splicing device is disclosed in Japanese Patent Application No. 3-
The one disclosed in 352582 is well known. In this method, an adhesive tape is pulled out from a reel, wound around a rotary drum to be adsorbed and held, and a cutting blade is passed through a slit provided in this rotary drum to cut the adhesive tape into a certain length.

The adhesive tape that has been cut and adsorbed and held is moved to the boundary between the magnetic tape and the leader tape together with the rotary drum, and pressed against each other to join the magnetic tape and the leader tape.

Further, this rotary drum has a columnar shape whose outer periphery is formed of an elastic body, and intermittently rotates in units of the distance between the slits. During this time, the adhesive tape sucked and held by the intermittent rotation is sequentially pulled out from the reel.

The rotary drum may have a circular sectional shape or a regular polygonal sectional shape. However, in the case of a circular rotary drum, the adhesive tape that is adsorbed can be cut reliably, but the pressure contact area when moving and adhering the cut adhesive tape to the members to be joined is small, so from both sides There is a problem that the adhesive tape will come off.

Further, in the case of the rotating drum 33 having a regular polygonal shape as shown in FIG. 4 and the slit 32 provided at the apex thereof, since the surface 33a for pressure contact is a straight line, the pressure contact area is very large and is cut. Although it is possible to securely adhere the adhesive tape, the adhesive tape 3 suddenly changes its direction on the slit 32, so that the adhesive tape 3 escapes to the outside in the vicinity of the slit 32 and is cut. The means 21 could not cut the adhesive tape 3 well.

Further, there is a risk that the adhesive tape adsorbed and held on the adjoining surface 33b sandwiching the slit 32 of the surface 33a to be press-contacted at the same time is pressed and adhered at the same time.

Therefore, as shown in FIG. 5, the cross section of the rotary drum 34 is formed by cutting the periphery of the slit 35 of the regular polygonal rotary drum with a straight line or a curved line. As a result, the adhesive tape 3 does not suddenly change its direction in the vicinity of the slit 35, and the adhesive tape 3 is not rotated.
The problem of poor cutting was solved by the reliable adsorption to the. Further, this shape makes the press contact area relatively large and makes it difficult for the adhesive tape adhered to the members to be peeled off.

[0011]

However, when the winding device for winding the magnetic tape in the cassette is constructed by using the splicing device having the rotating drum 34 having the shape shown in FIG. 5, the pressure contact area is relatively large. It became bigger,
Since it is not completely pressure-bonded, both ends of the adhesive tape that has adhered will float a little, and when the magnetic tape is wound in the cassette, the floating part of the adhesive tape will be caught at the entrance of the cassette and the adhesive tape will peel off. is there.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and provide a splicing device which can endure a usage such as moving an adhesive tape and a member to be joined in a narrow space immediately after adhering the adhesive tape. And

[0013]

In order to solve the above-mentioned problems, slits 7 are provided along the outer periphery at regular intervals and a rotary drum 5 for adsorbing and holding the adhesive tape 3 and a cutting blade pass through the slits 7. The cutting means 21 for cutting the adhesive tape 3 and the moving means 22 for moving the rotary drum 5 to press and bond the cut adhesive tape 3 to the member to be joined. In a splicing device provided with a rotating means (10) for intermittently rotating the rotary drum (5) with the inter-slit distance as a unit at the timing of stopping in connection with cutting and pressure contact, in the vicinity of the slit side in the rotation direction (9) of the rotary drum (5) The rotating means 10 intermittently rotates the rotating drum 5 so that the adhesive tape 3 is pressed against the rotating drum 5.

The sectional shape of the rotary drum 5 is substantially polygonal, and each slit 7 is provided at each vertex thereof, and each side of the polygonal polygon is a slit opposite to the rotating direction 9 of the rotary drum 5. It is curved near the side, or each side of the substantially polygonal shape is formed substantially at right angles to the slit 7 in the vicinity of the slit opposite to the rotation direction 9 of the rotary drum 5.

[0015]

The cutting means cuts the adhesive tape adsorbed and held on the rotary drum, and the moving means presses and bonds the cut adhesive tape to the members to be joined by moving the rotary drum. At this time, one side of the adhesive tape is surely adhered by pressing the adhesive tape near the slit side in the rotating direction of the rotary drum.

Further, since the cross-sectional shape of the rotary drum is formed such that the substantially polygonal side is curved near the slit side opposite to the rotating direction of the rotary drum or is substantially perpendicular to the slit, the adhesive tape is formed on the slit. The direction can be gently changed with, and the adhesive tape does not float from the rotating drum and can be cut reliably.

[0017]

1 is a schematic front view of a splicing apparatus according to an embodiment of the present invention, FIG. 2 is a schematic rear view thereof, and FIG. 3 is a schematic view of a rotary drum.

The reel stand 1 is a cylindrical block fixed to a substrate 2 and rotatably holds a reel 4 around which a long adhesive tape 3 having one surface coated with an adhesive is wound. This rotation is achieved because the inner circumference of the reel 4 is slightly larger than the outer circumference of the reel base 1.

The rotating drum 5 is a substantially polygonal column having a height substantially equal to the width of the adhesive tape 3, the outer periphery of which is formed of an elastic body, and is fixed to a shaft 6 which is rotatably supported by the substrate 2 and is rotated as described later. It is rotated intermittently by the means 10.

Further, as shown in FIG. 3, slits 7 are provided at each apex of the polygonal prism of the rotary drum 5.
A curved portion 8a in which each side 8 having a substantially polygonal cross section is curved in the vicinity of the slit on the side opposite to the rotation direction 9 of the rotary drum 5.
Are formed.

In other words, the rotating drum 5 has a substantially columnar shape, and the slits 7 are formed at regular intervals on the outer circumference of the rotating drum 5.
Is provided in a straight line portion 8b from the apex of the slit 7 on the rotating direction 9 side of the rotary drum 5 to the position leaving the vicinity of the slit 7 on the front side in the rotating direction 9 in the cross section between the slits. It is a cut shape.

Further, some side vents (not shown) are formed on the side surface 5a of the rotary drum 5, and the adhesive tape 3 is sucked by sucking air from the vents. Further, the side surface 5a, which has been moved to the lowermost end with respect to the drawing by rotating the rotary drum 5 intermittently, is configured to release the suction at the moment of pressure contact.

As shown in FIG. 2, the rotating means 10 is attached to the substrate 2 on the opposite side of the rotating drum 5, and is rotatably supported by a shaft 6 to which the rotating drum 5 is fixed. Plate 11 and ratchet gear 12 fixed to shaft 6
And an operating arm 13 that engages with the gear portion 12a of the ratchet gear 12, and rotates the rotary drum 5 intermittently.

The operating arm 13 has one end having a rotating plate 11.
A ratchet gear 1 is rotatably supported by a shaft 14 fixed to the ratchet gear 1 by a spring 15 whose one end is fixed to a rotating plate 11.
It is biased to the 2 side. The rotary plate 11 is biased in the direction of arrow 17 by a spring 16 having one end fixed to the substrate 2. The rotation of the rotary plate 11 by the biasing force of the spring 16 is limited by the stopper 18. Further, the rotary plate 11 is provided with a pin 20 that engages with the inclined surface 19a of the guide block 19 shown in FIG. 1 fixed to a base (not shown).

The cutting means 21 is composed of a cutting blade and a reciprocating drive source (not shown) which moves the cutting blade so as to pass through the slit 7, and cuts the adhesive tape 3 adsorbed and held on the rotary drum 5. The cutting means 21 cuts the adhesive tape 3 into a length equal to the distance between the adjacent slits 7, 7.

The moving means 22 moves the substrate 2 in the direction of the arrow 23 so that the adhesive tape 3a adsorbed and held on the lowermost side surface 5a of the rotary drum 5 is joined to the magnetic tape 24 and the reader. It is carried on a boundary 26 with the tape 25, where it is pressed and bonded.

Next, the operation of the above-mentioned splicing device will be described.

First, the adhesive tape 3 is pulled out from the reel 4 held on the reel stand 1 and is sucked and held by the rotary drum 5 with the surface coated with the adhesive through the tape guide 27. At this time, the adhesive tape 3 is pulled out and adsorbed to a position beyond the cutting means 21 so that the adhesive tape 3 can be cut by the cutting means 21.

Next, the cutting means 21 cuts the adhesive tape 3 adsorbed and held on the rotary drum 5. Then, the moving means 22 moves the rotating drum 5 together with the substrate 2 so that the lowermost side surface 5 a of the rotating drum 5 presses the boundary 26 between the magnetic tape 24 and the leader tape 25. At this first pressure contact, the adhesive tape is not yet adhered.

Next, the moving means 22 moves the substrate 2 in the direction of arrow 28. At this time, the pin 20 engages with the inclined surface 19a of the guide block 19, and the rotary plate 11 rotates in the direction of arrow 29. By this rotation, the operating arm 13 pushes the gear portion 12a of the ratchet gear 12 to rotate the ratchet gear 12. By this rotation, the rotating drum 5
Rotates by the distance between the adjacent slits 7, 7. Since the adhesive tape 3 is adsorbed and held on the rotary drum 5, the adhesive tape 3 is pulled out from the reel 4 by the rotation amount of the rotary drum 5.

The cutting means 21 cuts the adhesive tape 3 again, and the moving means 22 moves the substrate 2 in the direction of arrow 29. By this movement, the engagement between the pin 20 and the guide block 19 is released, and the rotary plate 11 is rotated in the direction of the arrow 17 by the force of the spring 16.

As a result, the operating arm 13 moves to the next gear portion 12b of the ratchet gear 12. At the same time, the adhesive tape 3a adsorbed and held on the lowermost side surface 5a of the rotary drum 5 becomes the magnetic tape 24 and the leader tape 25.
Bonded on the border 26 of

By repeating the above operation, the adhesive tapes cut into a predetermined length are sequentially bonded.

As shown in FIG. 3, the rotating means 10 includes slits 7 and 7 which are adjacent to the center 5b of the rotating drum 5.
The rotating drum 5 is intermittently rotated so that the straight line 30 passing through the center of the gap is pressed against the cutting means 21 while being inclined to the moving direction (arrow 23) of the moving means 22.

This inclination angle is set so that the lowermost linear portion 8b of the rotary drum 5 is parallel to the magnetic tape 24 and the leader tape 25 when the rotary drum 5 is inclined. In this embodiment, this inclination angle is set to 5.5 °.

Further, due to the inclination, when the adhesive tape 3a is adhered, the boundary 26 between the magnetic tape 24 and the leader tape 25 and the center of the adhesive tape 3a are displaced. In order to compensate for this, the center 5b of the rotary drum 5 is set to be displaced from the boundary.

As shown in FIG. 3, the adhesive tape 3a adhered by the splicing device of the present invention is surely adhered to the tip of the leader tape 25 side. As a result, even if the leader tape 25 and the magnetic tape 24 adhered in the direction of the arrow 31 are moved and passed through a narrow space, the adhesive tape 3a is not caught and the adhered state can be maintained.

The splicing device of the present invention is not limited to the above-mentioned embodiment, but can take various forms within the scope of the present invention. For example, the rotating drum 5
The curved portion 8a on the outer periphery of the may be a straight line instead of a curved line. Further, the straight line portion 8b does not have to be a straight line, either.
It may be formed so as to draw a gentle curve from b to the curved portion 8a.

[0039]

As described above, one of the adhesive tapes is surely adhered by pressing the adhesive tape in the vicinity of the slit side in the rotating direction of the rotary drum. Therefore, even if the adhesive tape is adhered and then used in an apparatus for passing through a narrow space like an apparatus for winding a magnetic tape in a cassette, the adhered state can be reliably maintained.

Further, the sectional shape of the rotary drum is such that the polygonal side is curved in the vicinity of the slit side opposite to the rotating direction of the rotary drum,
Alternatively, since the adhesive tape is formed so as to be substantially perpendicular to the slit, the direction of the adhesive tape can be changed gently on the slit, and the adhesive tape does not float from the rotating drum and can be cut reliably.

Further, by virtue of the configuration as described above,
The adhesive tape to be adhered and the adjacent adhesive tape are not adhered at the same time.

[Brief description of drawings]

FIG. 1 is a schematic front view of a splicing device according to an embodiment of the present invention.

FIG. 2 is a schematic rear view of the same.

FIG. 3 is a schematic view of a rotary drum of the same.

FIG. 4 is a schematic view of an example of a conventional rotary drum.

FIG. 5 is a schematic view of another example of a conventional rotating drum.

[Explanation of symbols]

 3 Adhesive Tape 5 Rotating Drum 7 Slit 9 Rotating Direction 10 Rotating Means 21 Cutting Means 22 Moving Means 24 Magnetic Tape 25 Leader Tape

Claims (3)

[Claims] 1. A rotary drum, which is provided with slits along the outer periphery at regular intervals, for adsorbing and holding an adhesive tape, a cutting means for passing a cutting blade through the slit to cut the adhesive tape, and the rotating drum. A moving means for pressing and adhering the adhesive tape cut and adhered to a member to be joined,
In a splicing device provided with a rotating means for intermittently rotating the rotating drum with the distance between the slits as a unit at the timing of stopping at the time of cutting and pressing in conjunction with the movement by the moving means, in the vicinity of the slit side in the rotating direction of the rotating drum. The splicing device, wherein the rotating means intermittently rotates the rotary drum so as to press the adhesive tape around the center. 2. The rotary drum has a substantially polygonal cross-sectional shape, each slit is provided at each vertex thereof, and each side of the polygon is curved near the slit side opposite to the rotating direction of the rotary drum. The splicing device according to claim 1, wherein 3. The cross-sectional shape of the rotary drum is substantially polygonal, and the respective slits are provided at respective vertices, and the slits are provided in the vicinity of a slit in which each side of the substantially polygonal shape is opposite to the rotation direction of the rotary drum. The splicing device according to claim 1, wherein the splicing device is formed substantially at a right angle to the.