DE1029784B - In particular, a wire unwinding device that works together with a coil winding machine - Google Patents

Description

GERMAN

It is known in a wire unwinding device as used in a coil winding machine is, the one or more wire unwinding wheels carrying pivotable arm with an adjustable Spring to provide. Such a spring has the task of this arm against the tension in the unwinding Pulling wire material up to maintain this tension. The spring usually becomes adjustable made to wire material different with the help of the wire unwinding device in question To be able to process strength and thus different strengths. It is common on such an unwinder to use a coil spring whose spring tension or its point of application on Arm is mutable. Drain arms for strand material, supported by pure spiral springs, are also known.

The aim of the invention is to make an easily operable and adjustable wire unwinding device extremely simple To create type of construction. In a wire unwinding device, in particular one that has a Coil winding machine cooperates, and those with a pivoting as well as under the action an adjustable spiral spring standing arm and one or more wire guide disks arranged on this is provided, this is achieved in that, according to the invention, the spring as a leaf spring trained and on the one hand their point of application on the arm displaceable and on the other hand their on the arm acting length can be changed as required.

This therefore enables double adjustability; by shifting the point of application of the The spring on the arm is the moment exerted by the spring on the arm as a result of a change in the lever arm changed; In addition, a change in this moment can also be achieved by changing the point of application exerted force can be achieved as a result of the change in the effective spring length.

In a preferred embodiment, one end of the spring is displaceable and lockable along the arm and the other spring end in a stationary holder. However, one end of the spring, which runs approximately parallel to the arm, can also be articulated to a fixed point via a rocker, while the point of application of the spring on the arm can be selected as desired by a device that can be moved and locked along the arm and the spring. These embodiments are characterized by a large number of adjustment options for the wire tension and, moreover, have a relatively low bearing load. It is also an advantage that the spring part to be accelerated is smaller when the arm moves, the smaller the set wire tension. The above-mentioned double adjustment option also has a complementary function, in particular with a coil winding machine
Wire unwinding device

Applicant:

NV Philips' Gloeilampenfabrieken,
Eindhoven (Netherlands)

Representative: Dipl.-Ing. H. Zoepke, patent attorney,
Munich 5, Erhardtstr. 11

Claimed priority:
Netherlands 29 May 1966

Willem van der Hoek, Eindhoven (Netherlands),
has been named as the inventor

Effect, as z. B. with a reduction in the moment exerted on the arm as a result of a reduction of the lever arm, the force then acting on the arm is automatically reduced; because When the arm is reduced in size, the effective length of the spring is greater and the spring is therefore proportionate slacker.

According to a further embodiment, this effect can also be achieved in that the Spring a gradually or abruptly changing stiffness in the longitudinal direction, z. B. a change its width, and is arranged so that the softer spring area with increasing effective length comes into play.

In particular, when the end facing away from the pivot point of the arm is essentially in the longitudinal direction of the arm extending spring is relatively close to the free end of the arm, to avoid that the end in question is unfavorable for the material of the spring during the movements of the arm has to perform large angular rotations, it is according to a further embodiment of the invention advantageous if the spring has an approximately elliptical shape, one end of which in clamped in place at the height of the arm pivot point

809 510/146

3 4

while its other end near the fulcrum with wire material can be circular or right-

the arm is firmly connected, but have within its angular cross-section.

As already mentioned, it is at certain Aussem at any point in clamping connection guides of the device according to the invention can be advanced. Although this can be brought about by means of a suitable, fixed or abruptly decreasing stiffness in the longitudinal hinge, it is often a constructional direction. This is generally made easier by Hch when the approximately elliptical spring is achieved by using a spring the dimension of which is composed of two halves which changes with respect to that in the width direction; an embodiment of the spring end fastened in the vicinity of the pivot point by a form of such a spring is shown in FIG. 4 a, rocking piece, ie connected by a double joint in which the spring 20 used in FIG. This embodiment offers the additional looks shown. The spring 20 has a part lent advantage that the spring end within the 21, by means of which it is on the arm 8, z. B. with the help of certain limits freely pivotable and resilient one or more bolts, is fixed, and also supporting part that comes free in the event of a broken wire 15 a part 22 whose width from the end 22 α to the end is able to absorb energy smoothly. 22 & gradually increases. As can be seen, in order to allow the free end of the arm to perform a relatively large stroke, the left, narrower part of this spring can be slacker than the wider part.

borrowed the device according to the invention in terms of the types of FIGS. 1 to 4 is Be designed in such a way that the approximately parallel to the 20 note the following:

Arm running area of the elliptical spring is in the embodiment of FIG

The spring half used a changing stiffness, leaf spring 30, which with its one end

e.g. a change in its width. 30 a is rigidly attached to a tab 31, the over

With reference to the drawings, in which Figs. 1 to 4, the arm 8 is slidable and on it in different four different distances from its pivot point 7 can be fixed in each case schematically in a side view. That

Embodiments of the wire unwinding device free end 30 b of this spring is along one of the

illustrated in accordance with the invention, the inven- tive wire unwinding device is provided with guide 32

application explained in more detail. The mentioned differences can be moved and fastened therein. As from Fig. 1

are essentially apparent from mutually different, the effective length on the arm 8 is Versions of the springs used and of different 30 the spring 30 by the distance between the guide

different supports of this spring on the tion 32 and the position of the rider 31 on the arm 8

Poor or in space. In Fig. 4a the plan view of the is determined. The angular position becomes at every moment

shown in Fig. 4 spring used. of arm 8, apart from the weight of arm 8

The drawing shows the application of the invention and of the other moving parts through which in a wire unwinding device for one of the 35 opposing moments on this arm

Flange to be unwound supply reel 1, the wire dependent. One moment is made up of the force P

material 2 practiced at a location (not shown) on one that originates from the unwinding wire material.

Coil must be wound. The wire unwinding The other moment is exerted by the force with

The device has a housing 3 with a foot 4, which verin the spring 30 to push the arm 8 up whose. Inside the supply reel 1 is to be arranged. 40 searches.

In the present case, the housing also has a cylindrical wire guide 5, which differs from that of FIG 40 α is rigidly attached to the arm 8. That has a pivot point at 7. An arm 8 can be pivoted around this pivot end 40 and this spring by means of a rocking point. It is also hung around the pivot. The rider 43 is rotatable along the arm 8 verpunkt 7 a guide wheel 10, which can be pushed and has a passage for the fg.lls with a wire arm 8 (not shown here) and a passage for the spring 40, see above that braking device can be combined. The wire material according to the position of the rider 43 on the arm 8 rial 2 winds when a force P is exerted on it, for example by the point of application of the spring 40 on the arm 8 winding a coil. The one in the drawing to the left of the rider free of the supply reel 1; it is passed through the lying part of the spring 40 is thus always inactive wire guide 5 and passes over sam; the effective length of the spring is in the present as a felt block trained wire tensioner lowing case by the. Distance between the rider 11 and along a curved, also with felt 55 43 and the pivot point 40 b of the spring 40 is conditional. Each clothed guide 11 α to the guide wheel 10, after the rider 43 is a more to the left that it is wrapped around with a few turns; takes up from position, so the effective length of there it is guided over the unwinding wheel 9 to the (not spring 40 larger and the spring thus slacker. If shown) to be wound coil. Insofar as the rider 43 lies more to the left on the arm 8, the devices shown in FIGS. 1 to 4 are similar to the force exerted by this spring on the arm. thus smaller. In this embodiment, the spring acting in the device according to the invention on a displacement of the rider along the arm 8 is not only subject to a bending change in the lever arm during operation. For this purpose, different springs can be exerted from the moment exerted on the arm due to the presence of the springs that are ultimately subjected to bending stress, but are also used in the manner such as leaf springs and wire springs - in contrast to the embodiment according to FIG ; However, the spring can also be composed of some force corresponding to this moment automatically ίη leaf or wire springs. Man changed in the same sense. The wire unwinding device: can e.g. B. put some leaf springs on top of each other or device according to Fig. 2 so, as well as arrange some wire springs next to each other. The 70 embodiments according to the following to _; .

3 and 4, descriptive of the use of this wire unwinding device for unwinding wire significantly different strengths and strengths.

The presence of the rocking piece 41 and the pivot point 42 is guaranteed, even if the rider 43 is pushed completely to the right, a sufficient angular rotation of the with this suspension device lying part of the spring 40. There is therefore no risk of excessive bending stresses, of the spring material in this area.

In the embodiment according to FIG. 3, as in FIG. 2, the spring 50 is fastened at its left end 50 a on the arm 8 at a point thereof which is in the vicinity of the pivot point 7 of the arm 8. Here, too, a rider 51 is displaceable along the spring 50 and the arm 8 and can be fixed in any desired position. In this embodiment, however, in contrast to FIG. 2, the end 50 δ of the spring 50 facing away from the fulcrum 7 is bent, and the same spring 50 extends over the part 50 c back to a fastening point 52 on the actual unwinding device. In this case, the part 50 b is supported in a flexible and freely pivotable manner in space. Here, too, it is thus achieved that when the tab is pushed completely to the right 51, on the portion 50 b no impermissibly high Biegebeanspannungen be exercised. Compared to the embodiment according to FIG. 2, those according to FIGS. 3 and 4 also have the advantage that the arm 8 can perform a large stroke in every rider position. In addition, the advantage is achieved at the last-mentioned embodiments, that is smoothly collected on wire-break free energy coming from the spring part 50 c (FIG. 3) and 24 (Fig. 4) and braked.

The embodiment according to FIG. 4 is basically similar to that according to FIG. 3, but differs structurally insofar as the mentioned spring 20 acts at its end 20b on a rocking piece 23 which is attached to the end 24a of a further leaf spring 24, with the latter leaf spring 24 is fixed with its other end 24 b on the wire unwinding device. This embodiment offers the advantage of being able to use a leaf spring with a completely different rigidity factor than for the leaf spring 20 for the part 24. In the case shown, you can, for. B. use two superposed parts for the spring 20, as shown in plan view in Fig. 4 a, while the spring 24 can consist of a single spring leaf with a greater strength than that of the other two leaves.

Claims (7)

Patent claim kitchen: 1. In particular with a coil winding machine cooperating wire unwinding device with a swiveling arm and under the action of an adjustable spiral spring one or more wire guide disks arranged on this, characterized in that that the spring (20, 30, 40, 50) is designed as a leaf spring and on the one hand their point of application on the arm (8) and on the other hand their on the Arm acting length can be changed as required. 2. Apparatus according to claim 1, characterized in that one end of the spring (30) along the arm (8) and the other spring end (30 b) in a stationary holder (32) is displaceable and lockable (31) (Fig. 1 ). 3. Apparatus according to claim 1, characterized in that one end (40 b) of the spring extending approximately parallel to the arm (8) is connected in an articulated manner via a rocking piece (41) to a fixed point (42), while the point of application of the spring (40 ) on the arm (8) by a device (43) which can be displaced and locked along the arm (8) and the spring (40) can be selected as desired (FIG. 2). 4. Apparatus according to claim 1, characterized in that the spring (20) is in Stiffness that changes gradually or abruptly in the longitudinal direction, e.g. B. a change in her Width, and is arranged so that the softer spring area with increasing effective length comes into play (Fig. 4 a). 5. The device according to claim 1, characterized in that the spring (50) has an approximately elliptical shape, its one end (50 c) at the level of the arm pivot point (7) is clamped in place (52), while its other end in fulcrum near fixedly connected to the arm (8) (50a), but can be displaced within its arm (8) about parallel region (50 b) with this at any point in clamping connection (51) (Fig. 3). 6. Apparatus according to claim 5, characterized in that the approximately elliptical spring (50) is composed of two halves (24,20) which are opposite to the spring end attached near the pivot point by a rocking piece (23), ie by a double joint (24 a , 20 b), are connected (Fig. 4). 7. Device according to claims 4, 5 and 6, characterized in that the approximately parallel to the arm (8) running area of the elliptical spring (24, 20) representing a spring half (20) changing stiffness, e.g. B. a change in its width has (Fig. 4, 4 a). Considered publications: German Patent Specifications Nos. 537 823, 532 371, 059; French Patent No. 575 809; U.S. Patent No. 2,640,663. 1 sheet of drawings © β © 510/146 5.