JPS58224957A - Cutting device of winder - Google Patents

Abstract

PURPOSE:To reliably wind a belt-like object, by a method wherein, in a cutting device of a belt-like object winder, the belt-like object is forcibly inserted into a nip point immediately after it is cut by a knife by means of an air chamber provided with an insertion projection formed in the shape to allow approaching of the projection to the nip point formed by a core and a rubber roll. CONSTITUTION:Through expansion of a cylinder 29, a belt-like object 8 is cut by a knife 31 at a spot above an insertion projection 20 of an air chamber 22 which is inseyed between a core 2 and a rubber roll 14 so as to approach a nip point 18. The forward end of the cut belt-like object 8 is directed to the nip point 18 in the vicinity of a cut point 17, and the forward end of the belt-like object 8 is guided to the nip point 18 side in a manner that it is pressed against the outer peripheral surface of the core 2 by a compressed air blown off through an air blow-off hole 26 formed in a circular arc surface 21 part of the air chamber 22. This constitution enables the forward end of the belt-like object to be reliably forcibly inserted into the nip point 18 without producing a bent part at the forward end thereof to wind it around the core 2.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cutting device for winding machines for strips, in particular for continuous winding machines for paper, film, etc.

A device that continuously winds a strip has a mechanism that automatically cuts the strip when it is wound to the required thickness, and attaches the cut end to another winding core. Equipped with a winding mechanism.

Fig. 1 shows a general example of this, and shows a turret type winder 4 whose central portion is rotatably supported by a shaft 1 and whose cores 2 and 3 are supported at both ends. , and is supported rotatably in the direction of the arrow 6 with respect to the support pedestal 5 at a position close to the core 2 that is about to be wound;
It also has a lead roll 9 that applies tension to the strip 8 guided to the web roll 7 via the core 2 by rotation of a turret type winder, and a cylinder device is provided between the core 2 and the lead roll 9. A cutter arm L is provided with a knife 11 that cuts the strip 8 by the operation of 10, and is further supported rotatably in the direction of arrow 13 with respect to the support frame 5, and when pressed against the core 2. A cutting device 16 is constituted by a roll support arm 15 having a rubber roll 14 at its tip that serves to wrap the tip of the strip 8 cut by the knife 11 around the core 2.

However, in the above-mentioned conventional method, the distance between the core 2 and the lead roll 9 is large (because of this, when the knife 11 is moved in a curved direction to cut the material, the strip 8 stretches and escapes, resulting in poor cut quality). In addition, there is a problem that the cut point 17 by the knife 11 is far apart from the nip point 18 between the core 2 and the rubber roll 14, and as a result, the tip of the cut strip 8 is not always consistent with the core 2. It often happens that winding becomes impossible.

In addition, in order to prevent this, air is blown to send the tip of the strip 8 toward the nip point 18, but even in this case, the strip There is always a problem that the tip of the 8 is bent or curled up and is bitten into the winding.As a result, due to the poor biting and the resulting step at the beginning of the winding, the winding can become quite long. The yield of strips 8 has been reduced due to defects, and the losses caused by the drop in yield of expensive strips such as high-grade paper or magnetic film are considerable, and an immediate solution is desired. It's rare.

The present invention has been made in view of these points, and has a charging protrusion that is shaped to enter between the core and the rubber roll so as to approach the nip point, and is connected to a fan, and is connected to a belt-like material. An air chamber having an air blowing hole is provided in the contacting part, and a knife is provided in the air chamber so as to protrude toward the m1 distribution nip point at the position of the charging protrusion. This is aimed at improving the cut edge of the strip and ensuring that the tip of the strip cuts into the nip point as described above.

Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIG. 2, the core 2 that is about to be wound and the core 2 are operated in the direction of arrow 19.
゛It has a charging protrusion that is shaped to fit between the core 2 and the rubber roll 14 so as to approach the nip point 18 with the rubber roll 14 provided so as to perform pressing, and a part of the outer periphery of the core 2 is required. An air chamber η having the same width as the band-shaped object 8 and having an arcuate surface 21 surrounding it with a gap of .

The air chamber η is provided with a cutter arm 5 rotatably provided in the direction of the arrow through a cylinder device on the support frame 5.
The air chamber η is fixed to the core 2 so that it can be moved toward and away from the core 2, and when the air chamber η is brought close to the core 2, it is guided to the web roll 7 via the rubber roll 14 and the core 2. A large number of air blowing holes are formed at the position of the air chamber n where the strip 8 contacts, and compressed air from the fan 27 is introduced into the air chamber n through the air pipe row. It has become.

Further, a cylinder damper is provided inside the air chamber B, and the operation of the cylinder damper causes the knife to protrude toward the nip point 18 through the knife hole I formed at the end of the insertion protrusion position, and to be retracted and stored. Knife 31 designed to perform
is provided.

When cutting the strip 8 using the above-mentioned cutting device of the present invention, the rubber roll 14 and the air chamber η are moved from the waiting position to the state shown in FIG. 2 by operating in the directions of arrows 19 and 24. At this time, compressed air from the fan path has been supplied to air chamber B in advance, so the strip 8 that is about to come into contact with air chamber B is lifted up by the compressed air blown out from the air outlet. Therefore, damage caused by contact is prevented.

In this state, the cylinder 4 is extended and the strip 8 is cut with the knife 31. At this time, since the strip 8 is cut at the position of the charging protrusion I with a small radius of curvature, the strip 8 is hardly stretched by the extrusion of the knife 31, so that the cut end of the strip 8 is Significantly improved.

Furthermore, the nip point 18 and the cutting point 17 are located close to each other, since the cutting of the strip 8 is carried out above the charging protrusion that is inserted between the core 2 and the rubber roll 14 so as to approach the nip point 18. Moreover, the cut tip of the strip 8 is oriented toward the nip point 18, and the tip of the strip 8 is oriented toward the nip point 18, and the compressed air from the air outlet provided in the arc surface 21 of the air chamber η causes the tip of the strip 8 to be oriented toward the nip point 18. Since it acts as if being pressed against the outer periphery of the core 2 and is guided to the nip point 181III, it can be reliably inserted into the nip point 18 and wound around the core 2 without bending the tip. .

It should be noted that the present invention is not limited to the above-mentioned embodiments, and that the knife may be of a serrated type or of a traverse type, and that the shape of the achampa may be changed in various ways. It goes without saying that various changes may be made without departing from the gist of the invention.

According to the cutting device in the winder of the present invention described above, the following excellent effects can be achieved.

(i) An air chamber having a charging protrusion shaped to approach the nip point between the core and the rubber roll guides the strip to a position close to the nip point, and the material is placed in the air chamber on the charging protrusion near the nip point. Since the belt-like object is cut with a knife provided in the belt, the cut belt-like object can be immediately bitten into the nip point and wound securely.

(iD) By bringing the nip point and the cutting point extremely close, it is possible to prevent the leading edge of the strip from being bent and bitten into the belt, thereby improving the yield.

(g) Since the strip is cut at the portion where the radius of curvature of the charging protrusion is small, elongation can be eliminated and the cut end of the strip can be held well.

0 A fan is connected to the air chamber and compressed air is blown out from the air outlet to float the strip.
It is also possible to prevent damage caused by contact with the t' member.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing a general example of a conventional device, and FIG. 2 is an explanatory diagram showing an embodiment of the present invention. 2 is a core, 7 is a web roll, 8 is a strip, 14 is a rubber roll, 17 is a cutting point, 18 is a nip point, another is a charging protrusion, 21 is a circular arc surface, n is an air chamber, 5 is a cutter arm, Part is an air blowing hole, d is a fan, Z is an air pipe, 6 is a cylinder, 美 is a hole for a knife, and 31 is a knife. Patent applicant Utility model registration applicant Ishikawajima Harima Heavy Industries Co., Ltd.

Claims (1)

[Claims] 1) It has a charging protrusion shaped to penetrate between the core and the rubber roll so as to approach the nip point, and has an air blowing hole in the contact area of the strip, and is connected to a fan via an air pipe. an air chamber configured to be able to approach and move away from the nip point, and further provided with a knife inside the air chamber that protrudes toward the nip point at the position of the charging protrusion. Cutting device in winder.