JP3386402B2 - Core - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a core suitable for use in a web winding device such as a punching machine, a slitter machine and a bag making machine.

[0002]

2. Description of the Related Art Conventionally, as a winding core used in a web winding device, a web winding slit is provided at an intermediate portion in the longitudinal direction of a tubular body, and the front end of the web is inserted into this slit to wind the web. There is something to take (Actual Kaihei 2-56650).

[0003]

However, in the prior art, after winding the web, the core cannot be removed from the core of the web winding body, and the reusability of the core is poor.

An object of the present invention is to improve the repeatability of the winding core.

[0005]

The present invention according to claim 1 comprises an outer tube with a slit having a C-shaped cross section and an inner tube with a slit having a C-shaped cross section that can be loosely inserted into the inner diameter of the outer tube. Becomes
Insert the inner tube into the outer tube and align both slits.
Insert the tip of the leader tape into these slits.
From the state, rotate both of them relative to each other,
Hold it between the two, and further attach the leader tape to the entire circumference of the outer tube.
Wrap it around the outer circumference of the leader tape.
A web can be attached, the inner tube inserted in the outer tube is set on a winding shaft, and the outer tube and the inner tube can be attached to and detached from the winding shaft by expanding and contracting the winding shaft. It is a thing.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The winding core 10 is shown in FIG. 1 or FIG.
Is set on the winding shaft 21 of the winding device 20,
The web 1 can be wound up. At this time, the take-up shaft 21 is provided with lugs 22 projecting and sinking into the outer peripheral surface at a plurality of positions in the circumferential direction by a pressurized fluid or the like, and the chuck outer diameter of the winding core 10 by the take-up shaft 21 can be expanded and contracted by the lugs 22. There is. A clutch 23 is interposed in the drive system of the winding shaft 21.

As shown in FIG. 2, the winding core 10 comprises an outer tube 11 with slits and an inner tube 12 with slits that can be loosely inserted inside the outer tube 11. The outer tube 11 has a C-shaped cross section and a slit 11A, and the inner tube 12 also has a C-shaped cross section and a slit 12A.

The winding core 10 has the following structures (1) to (6) so that the web 1 can be wound (FIGS. 2 and 3). (1) The inner tube 12 is inserted into the outer tube 11, and the slits 11A and 12A of both are combined to form the slits 11A and 12A.
Insert the tip end of the non-adhesive leader tape 2 such as a non-woven fabric (FIG. 3 (A)).

(2) The outer tube 11 and the inner tube 12 are rotated relative to each other so that their slits 11A and 12A are displaced from each other, the leading end of the leader tape 2 is clamped between the two, and the leader tape 2 is attached to the outer tube 11. It is wound all around (at least one round) (FIG. 3 (B)).

(3) The double-sided adhesive tape 3 is wound around the entire outer circumference of the outer tube 11 to form an assembly (FIG. 3).
(C)). At this time, the double-sided adhesive tape 3 may be simply wound with a wide width corresponding to the entire width of the outer tube 11, but it is preferable to wind a narrow width with a spiral shape (FIGS. 2B and 3). (C)).

(4) The above-mentioned assembly (3) including the leader tape 2 of the winding core 10 and the double-sided adhesive tape 3 is set on the winding shaft 21 of the winding device 20. At this time, the winding shaft 21 expands the outer diameter of the chuck by the above-mentioned protrusion of the lug 22 to pressurize the inner diameter of the inner pipe 12, and the outer pipe 11 and the inner pipe 12 also have their C
It is expanded and held so as to open the letter.

(5) The winding core 10 rotates with the rotation of the winding shaft 21, and the web 1 is manually or mechanically operated to rotate the outer tube 1
When it is adhered to the double-sided adhesive tape 3 on the outer periphery of 1, the web 1 starts to be continuously wound (FIG. 3 (D)). At this time, the winding device 20 is used by interposing the clutch 23 in the drive system of the winding shaft 21 and rotating the winding shaft 21 at a higher speed than the loading speed of the web 1 as described above. The web 1 is always wound while applying a constant winding tension to the web 1.

(6) When the winding of the web 1 around the winding core 10 is completed, the winding shaft 21 is retracted by the lug 22 to reduce the outer diameter of the chuck to separate the inner diameter of the inner tube 12 from the inner diameter of the inner tube 12. It can be removed from the winding shaft 21 together with the web winding body 1A. Then, the inner tube 12 that has a play with respect to the outer tube 11 is pulled out from the outer tube 11, and the outer tube 11 that has a play with respect to the center portion of the web winding body 1A.
Is removed from the web winding body 1A (FIG. 3 (A)). At this time, the leader tape 1 sandwiched between the outer tube 11 and the inner tube 12 at the start of winding is adhered to the double-sided adhesive tape 3 (or the adhesive surface of the web itself) on the side of the web winding body 1A. Is left on the side of the web winding body 1A.

Therefore, according to this embodiment, the following operational effects are obtained. After the web 1 is wound on the outer tube 11 of the winding core 10, the diameter of the winding shaft 21 is reduced to bring the outer tube 11 and the inner tube 12 into a reduced diameter state. Can be smoothly removed from the core of the web winding body 1A.

After the above, the core 10 consisting of the outer tube 11 and the inner tube 12 can be immediately reused.

A winding core 10 is mounted on a winding shaft 21 of a winding device 20, and a double-sided adhesive tape 3 is provided on the outer circumference of a leader tape 2 which is wound around the outer tube 11 of the winding core 10. The web 1 can be wound, or the web 1 can be wound by adhering an adhesive surface provided on the web 1 itself.

After the above-mentioned winding is completed, the diameter of the winding shaft 21 is reduced so that the outer pipe 11 and the inner pipe 12 are also reduced in diameter, so that the outer pipe 11 and the inner pipe 12 are wound on the web. The core tape 1A is smoothly removed from the core, and the leader tape 2 and the double-sided adhesive tape 3 are left on the web winding body 1A side so that the core 10 including the outer tube 11 and the inner tube 12 can be immediately and repeatedly used. .

[0018]

As described above, according to the present invention, the reusability of the winding core can be improved.

[Brief description of drawings]

FIG. 1 is a schematic view showing an example of a winding device.

FIG. 2 is a schematic diagram showing a winding core.

FIG. 3 is a schematic diagram showing a process of using the winding core.

[Explanation of symbols]

1 web 2 leader tape 3 double-sided adhesive tape 10 winding core 11 outer tube 11A slit 12 inner tube 12A slit 21 winding shaft 23 clutch

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) B65H 19/28 B41J 17/00 B41J 17/24 B65H 18/04 B65H 75/28

Claims (2)

(57) [Claims] 1. An outer tube having a C-shaped cross section and having a slit, and an inner tube having a C-shaped cross section that can be loosely inserted into the inner diameter of the outer tube. Match the slit of
Insert the tip of the leader tape into these slits.
From the state, rotate both of them relative to each other,
Hold it between the two, and further attach the leader tape to the entire circumference of the outer tube.
Wrap it around the outer circumference of the leader tape.
A core in which a web can be attached, the inner tube inserted in the outer tube is set on a winding shaft, and the outer tube and the inner tube can be attached to and detached from the winding shaft by expanding and contracting the winding shaft. Wherein said core is claim while being interposed clutch in the drive system of the winding shaft, which is used by being attached to the take-up shaft which is imparted a high-speed rotation than the carrying speed of the web The winding core according to 1 .