JPS6164651A - Elastic sleeve for expanding mandrel of winder - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an elastic sleeve for an expanding mandrel of a winder, of the type having a self-closing reinforcement embedded in the sleeve. .

In conventional winding techniques, an elastic sleeve surrounding the expansion mandrel stretches with this expansion mandrel during expansion and covers the gap created between the expansion segments, so that this gap Otherwise, the corner edges of the gap do not damage the rolled-up strip, and the friction ratio between the sleeve and the rolled-up strip is better than in an expanding mandrel without a sleeve. However, in conventional IJ-sprays for the expanding mandrel of a winder, the corner edges sink into the elastic sleeve, so that the strip material being rolled up Pull (
The disadvantage is that the risk of the sexual sleeve being damaged is significantly higher. Furthermore, when expanding the winding and mandrel mandrels, an overstretching of the sleeve must be accounted for, which significantly reduces the tensioning forces, so that the sleeve can possibly be pulled out of the expanding mandrel together with the coil. Also, the elastic sleeve must have a certain minimum wall thickness so that the mechanical stress can be maintained. Therefore, the diameter of a coil wound on an expansion mandrel surrounded by one elastic sleeve is larger than the straight line of a coil wound on an expansion mandrel without a sleeve, and hence the need to wind the coil. A death occurs.

In order to be able to adapt the expansion mandrel to different diameters of coils, it is known to surround the expansion mandrel with an elastic sled whose wall thickness is approximately maintained during expansion. ) IJJ
(Refer to the specification of Awa Patent No. 4277918). For this purpose, an axial notch is formed in the sleeve.
When expanding the mandrel, cut the sleeve ’7J.
) Lay out the remaining layers one by one. Note (In order to compensate for at least part of the fault due to not making the notches, the remaining layers without the notches are provided with a self-closing reinforcing layer, but this reinforcing layer is Unable to prevent sleeve expansion;
Therefore, it has the same elastic properties, which leads to a forced reduction in stiffness, especially for uncut sleeves, with the risk of overstretching.

In order to obtain mandrels for paper or textiles that are flexible in multiple planes, it is known to manufacture the mandrel from an elastic sleeve in which coil springs are embedded as reinforcement. Patent No. 3248
(See specification No. 061). Sleeves with such reinforcements may not be suitable, since this reinforcement can cause the sleeve to curve in multiple planes or prevent the radial expansion required in connection with expansion mandrels. It cannot be provided in conjunction with an expanding mandrel.

It is also known to surround the expansion mandrel with a steel sheath provided with slits (Aus) IJA Patent No. 35002. The longitudinal edges of the material abut each other in the expanded state without gaps. In order to reliably avoid axial gaps between the longitudinal edges of the steel cladding, the guide rails are hinged to slotted holes in the slit edge region of the steel cladding; Engaged within the bore is a pin which is journalled for radial movement at mutually facing slit edges.

The guide rail forms a stop for the pin reservoir after passing through the elongated hole, thus preventing further expansion of the stopper 314 sheathing. However, since the steel cladding cannot be stretched in the circumferential direction, it is necessary to provide slits in order to change the diameter, and this leads to the difficulties that some such reels present in unslit elastic sleeves. No definitive solution is provided to remove it.

OBJECT OF THE INVENTION The object of the invention is therefore to provide an elastic sleeve without slits for an expanding mandrel, which avoids the disadvantages of the prior art and which has a relatively low wall thickness and high wear resistance. It is an object of the present invention to provide a sleeve which, moreover, is not exposed to the risk of overstretching.

Means for Solving the Problem The present invention solves this problem, and the reinforcing members are adjacent to each other with stoppers and can be moved in order to extend the circumferential length thereof. It has strong members.

The action is either formed in a lattice or mesh shape, or mutually connected to extend the circumferential length.
I have all the possible parts, so I have 5
il:lJ possible member or free movement】AI:・j
Jf row 1! - until it suddenly abuts the intermediate part, the sleeve can be easily inserted through the expansion segment of the expansion mandrel without adversely affecting the stretching properties. It is made to expand. In addition, the members movable relative to each other are limited by stops, which not only prevents overstretching of the elastic sleeve, but also defines the possible expansion of the expansion segment, thereby ensuring uniformity of the coil. A suitable inner diameter is guaranteed. When the expansion segment is contracted, the elastic sleeve is also contracted due to its elasticity, so that the reinforcing elements are moved in a direction facing each other. The elastic stretching capacity of the sleeve is therefore not overloaded and the sleeve is relatively thin.
It can be formed with indigo thickness. In this context, the maximum stresses in the sleeve are obtained in the expanded state of the expansion mandrel, with reinforcing elements movable relative to each other being supported against tension forces. Due to this tension-resisting support, most of the stress is absorbed by the self-closing reinforcement, which causes a corresponding load response of the elastic sleeve material 1
Arrange ten Ub, do it.

It is particularly advantageous if the groove is provided in the area of the outer circumferential surface of the sleeve. This is because in this case the reinforcement is located in the maximum mechanical stress range and precisely defines the outer diameter of the sleeve.

Embodiment Next, the structure of the present invention will be specifically explained with reference to the embodiment shown in the drawings.

(from rubber or correspondingly elastic synthetic resin)b<l'rf
The sleeve 1 has, in the area of its outer circumferential surface 2, a reinforcing member 3 assembled from members 4 which are individually movable relative to each other in the circumferential direction of the sleeve. In the embodiment of FIG. 2, these members 4 consist of individual helical wires of 1 t each wrapped around adjacent crossbars 5.

The spacing between each grooved bar 5 is smaller than the inner width of the helical wire, so that the members of the reinforcement 3 interlock with each other. The reinforcement assembled into a self-closing sheathing is thus expanded until the helical wire impinges on the crossbar 5, which prevents further expansion of the reinforcement. Therefore, the sleeve 1 with this reinforcement 3 is expanded by the expansion segment of the expansion mandrel of the reel within the possible circumferential extension of the reinforcement, but without extending the circumferential extension. , the risk of overstretching of the elastic sleeve is avoided.

When the helical wire and the crossbar 5 are completely covered by the elastic material of the sleeve 1, the elastic material present between the helical wire and the crossbar upon expansion of the sleeve will spread between each member of the reinforcement. It will be pushed away until a strong connection is achieved for one bow again. In this case, the spiral wire (member 4) of course does not directly abut the crossbar.

Of course, the illustrated reinforcement for the elastic sleeve 1 can also be replaced by another reinforcement that allows expansion of the sleeve to a predetermined circumferential length. For this,
For the purpose of extending the circumferential length, the reinforcing materials are mutually limited by stoppers: 21] d d? Since the reinforcement members that engage each other with play must move over the free travel length provided by the play and then resist the tension. You can get a strong connection. This effect is achieved by a mesh of wires that engage with each other, as well as by tongues that are hinged to each other via slots. What is important is that limited movement of the reinforcing elements is ensured in the circumferential direction, that the reinforcing elements themselves are constructed to be strong against tension, and that the reinforcing elements are self-closing. That's what I'm doing.

Effects As described above, according to the present invention, with the provision of a slit for the expansion mandrel and an elastic sleeve, the disadvantages of the conventional ones can be avoided, and a high wear resistance is achieved with a relatively small wall thickness. t, which has properties and is not exposed to the risk of overstretching.

[Brief explanation of drawings]

Fig. 1 is an enlarged view of the winding machine) An uninvented example of the mandrel, with a part of the elastic sleeve broken due to an accident: a complete end view, Fig. 2 shows the reinforcement provided on the sleeve. It is an enlarged view of a part of the material. 1... Sleeve, 2... Outer circumferential surface, 3... Reinforcement material, 4...
・Spiral wire, 5... Horizontal bar 1 Sleeve 3,..., Mli reinforcement 4 Member

Claims (1)

Claims: 1. An elastic sleeve (1) for the expansion mandrel of a winder, of the type with a self-closing reinforcement (3) embedded in the sleeve (1). In order to extend the circumferential length of the reinforcing member (3), the reinforcing member (3) has members (4) which are movable and are strong against tensile forces and are adjacent to each other with a stopper. An elastic sleeve for the expansion mandrel of the winder. 2. Elastic sleeve for an expanding mandrel of a winder according to claim 1, wherein the reinforcing element (3) is provided in the area of the outer circumferential surface (2) of the sleeve (1).