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Title:
REEL-CHANGING APPARATUS PARTICULARLY SUITABLE FOR FEEDING WORKING MACHINES
Document Type and Number:
WIPO Patent Application WO/2016/016866
Kind Code:
A4
Abstract:
Apparatus suitable for guaranteeing a quick and automatic change of materials wound on reels (B1, B2), said apparatus consisting mainly of a reel-alternating mechanism (fig. 1, 2) combined with a mechanism (fig. 3, 4) for cutting and reconnecting the reeled material.

Inventors:
DOTTA, Angelo (Via Alamandini No. 10, Bologna, I-40136, IT)
Application Number:
IB2015/055831
Publication Date:
February 04, 2016
Filing Date:
July 31, 2015
Export Citation:
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Assignee:
DOTTA, Angelo (Via Alamandini No. 10, Bologna, I-40136, IT)
International Classes:
B65H16/02; B65H16/04; B65H19/18
Attorney, Agent or Firm:
ROBBA, Pierpaolo et al. (Interpatent Srl, Via Caboto 35, Torino, I-10129, IT)
Download PDF:
Claims:
AMENDED CLAIMS

received by the International Bureau on 1 1 March 2016 (1 1.03.2016)

1. Reel-changing apparatus for feeding working machines, wherein there is provided an assembly for cutting and reconnecting the reeled material (T), comprising:

a cutting tool (CT) positioned for intercepting a first face of the material (T) of a band unwound from a first reel (BBl) standing in the working position and exhausted or close to exhaustion, said cutting tool being capable of position itself transversely on said first face of the material (T) unwound from said reel (BBl);

a counter-acting tool (BM) capable of intercepting a second face of the material (T) of said band, at the cutting tool (CT), and provided with a suction head (ASP), said counter-acting tool being capable of moving from a rest position to a working position in contact with the material (T) of the band unwound from said reel (BBl) exhausted or close to exhaustion;

wherein the mobile cutting tool (CT) and the counter-acting tool (BM) cooperate with each other for cutting the material (T) unwound from saidfirst reel (BBl) and wherein the counter-acting tool (BM) holds by air suction the edge of the material cut from said first reel (BBl) for bringing said edge to being reconnected to the leading edge of a second reel (BB2) brought to the working position by the apparatus in replacement of the first reel (BBl).

2. Apparatus according to claim 1, wherein the cutting tool (CT) is movable transversely with respect to the band (T) to be cut and is capable of entering the area cleared by the material (T) unwound from said reel (BBl) exhausted or close to exhaustion and of retracting for allowing insertion of a new reel.

3. Apparatus according to claim 1 or 2, wherein the counter-acting tool comprises an oscillating arm (BM) assisted by a control unit programmed for:

- causing forward movement of said oscillating arm from a rest position to a working position in contact with the material (T) of the band unwound from a reel (BBl) standing in the working position;

- switching on air suction through said suction head (ASP);

- cooperating for cutting the material (T) of said band;

- causing retraction of said arm from the working position to the rest position while maintaining active the air suction for holding the cut edge of the band; - causing forward movement of said arm for bringing the cut edge against the leading edge of a new reel;

- causing retraction of said arm from the working position to the rest position after switching off air suction.

4. Reel-changing apparatus for feeding working machines, comprising:

a mobile support (SS) capable of guided traveling motion;

a carousel (GS) rotatably supported by said mobile support (SS);

two or more reel -holders (B1,B2) connected to the carousel and arranged symmetrically with respect the rotation axis of the carousel;

a movement actuating device (C,l) capable of causing rotation of the carousel (GS) around said axis, said device alternating each of the reel-holders (B1,B2) in the same angular working position;

a control device (P) that controls the guided traveling of said mobile support (SS) and is capable of causing retraction of the mobile support (SS) away from a working position and of causing the forward movement of the mobile support in the opposite direction once the carousel has performed one rotation around its rotation axis for bringing a second reel-holder (B2) to said working position. 5. Apparatus according to claim 4, wherein the mobile support (SS) comprises a carriage in which there are provided:

a flanged tubular element (SI) housing bearings of a rotating shaft (A) of a central rotating element;

a support plate (S2) connected to the flanged tubular element (SI);

- hollow backing elements (S3) fixed to the support plate (S2) and internally equipped with ball sleeves or bushes slidable on guides;

and wherein said guides comprise guiding shafts (AG1,AG2) fixed to a fixed part of the apparatus. 6. Apparatus according to claim 5, wherein the carriage comprises:

a toothed rack (C) slidably inserted in the carriage and parallel to said guides;

a gear (1) coaxial with the rotating shaft (A) of said central rotating element and connected thereto by means of a one-way or unidirectional bearing which engages with the toothed rack (C), said bearing becoming engaged when the mobile support (SS) retracts for moving the first reel-holder (Bl) away from the working position and said bearing becoming disengaged when the mobile support (SS) moves forward for bringing said reel- holder to said working position;

- a pair of abutment elements (R1,R2) fixedly arranged at the ends of the travel of the toothed rack (C).

7. Apparatus according to claim 4 or 5 or 6, wherein each reel-holder (B1,B2) comprises a corresponding rotating spindle having its own rotation axis, a reel (BB1,BB2) of material to be unwound being mountable on the spindle, said spindle being provided with a protrusion (EST) capable of engaging into a clutch (FRZ) provided in a working machine to which the apparatus is associated.

8. Method for controlling a reel-changing apparatus intended for feeding working machines and made in accordance with any of the claims 1 to 7, wherein the following the steps are provided:

detecting the approaching exhaustion of the material (T) unwound from a reel (BB1) mounted on a reel -holder (Bl) of the feeding apparatus standing in the working position;

blocking, either by stopping the machine to which the band of material (T) is fed or by means of a brake (FR), the forwarding movement of the material (T) unwound from an exhausting reel (BB1) which is mounted on a reel-holder (Bl) of the feeding apparatus which stands in the working position;

cutting the material (T) unwound from said exhausting reel;

driving retraction of the mobile support (SS) for bringing said exhausting reel to the rest position;

causing rotation of the carousel (GS);

driving forward movement of the mobile support (SS) for bringing to the working position a second reel mounted on a second reel-holder (B2).