DE9408880U1 - Feed device for longitudinal wires with double-sided drive - Google Patents

Description

Emil Jäger GmbH & Co. KG, Dahlweg 105, D-48153 Münster "Feed device for longitudinal wires with double-sided drive"

The invention relates to a feed device according to the generic term

of claim 1.

Such feed devices are widely known. The pressure roller serves as a counter bearing for the driven roller, so that the longitudinal wire cannot escape the roller and due to the

Rotational movement of the roller in the longitudinal direction.

In some cases, knurled driven rollers are used to ensure a safe loading of the longitudinal wire.

In particular, when using longitudinal wires with a very small diameter, there is a risk that the wires will be flattened on one or both sides due to the required contact forces, or that the knurling will be as large or larger than the diameter of the wires, so that the wires

be severed. The wires may also become bent.

The invention is based on the task of improving a feed device of this type in such a way that even when using longitudinal wires with a very small diameter,

This ensures that the wires are fed safely and that the wire material is protected at the same time.

This object underlying the invention is achieved by the embodiment according to the characterizing part of the claim

solved.

Advantageous embodiments of the invention can be found in the subclaims.
35

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An embodiment of the invention is explained in more detail below with reference to the drawings.

Fig. 1 is a side view of an inventive

device, and

Fig. 2 is a view of the device of Figure 1.,

but in the longitudinal direction of the longitudinal wires.

In Figure 1, 1 denotes a longitudinal wire which is acted upon from below by a driven roller 2. A second driven roller 3 is arranged above the longitudinal wire 1. Counter rollers 15 ensure that the rollers 2 and 3 do not bend under the load. The second driven roller 3 does not act upon the longitudinal wire 1 directly, but rather by means of a pressure roller 4.

In the position shown in Figure 1, the pressure roller is in its working position in which it is driven on the one hand by the second driven roller 3 itself and on the other hand rests against the longitudinal wire 1 and thus also drives it.

The lower driven roller 2 is smooth and without knurling, so that even minimal wire cross-sections of the longitudinal wires cannot lead to damage or deformation of the longitudinal wires. The pressure roller 4 is also smooth and without

Profiling trained.

The pressure roller 4 is mounted on a boom 7 by means of a small swivel arm 5 so that it can swivel around a pivot point 6. The pressure roller 4 can swing freely around the pivot point 6.

The boom 7 is pivotally mounted at a pivot point 8 and is actuated at its free, i.e. movable, end by a piston-cylinder arrangement 10, which can work hydraulically or pneumatically and is attached to an arm 11 of the

supports the welding machine.

Due to the pendulum bearing of the swivel arm 5, the pressure roller 4 can always assume a position in which it is able to hold both the second and third rollers, even if this pressure roller is subject to progressive wear or if the longitudinal wire diameters are very different.

driven roller 3 as well as on the longitudinal wire 1.

Compared to its working position shown in Figure 1, the pressure roller 4 can be moved into its rest position by retracting the piston-cylinder arrangement 10 so that the free end 9 of the

boom 7 is moved upwards in the drawing.

Other drive devices, for example by means of spindles or the like, are conceivable for the boom 7. In an arrangement of several similar devices according to the invention over

However, for the entire width of the mesh mat to be welded, a pneumatic or hydraulic pressurization of the piston-cylinder arrangement 10 is advantageous, as this ensures uniform pressure conditions throughout the entire system.

In Figure 2 it can be seen that the device is very narrow, so that several similar devices for producing fine-mesh wire grids (e.g. in a 25 mm grid) can be arranged next to each other.

Since the piston-cylinder arrangement 10 is wider than the permissible grid dimension of 25 mm, two attack points 12 for the piston-cylinder arrangement 10 are provided at the free end 9 of each boom 7, whereby only one such arrangement acts on only one of the two intended attack points 12 on each boom.

On two adjacent arrangements according to the invention, the piston-cylinder arrangements 10 can therefore be arranged offset, as can be seen from both drawings, in order to enable the desired narrow grid dimension.

In order to achieve an identical pressure force of the pressure roller 4 for similar strokes of the piston-cylinder arrangements, the other end of each arm 7 is provided with two holes 14, of which only one is used as a pivot point 8. The choice of the hole 14 used for the pivot point 8 depends

on which of the two attachment points 12 is used for attaching the piston-cylinder arrangement 10.

The geometry of the boom 7 and the swivel arm 5 as well as their arrangement in relation to the second driven roller 3 ensures that the pressure roller bears against the roller 3 with more force than against the longitudinal wire 1, i.e. that the force vectors of the pressure force result in a larger vector from the pressure roller 4 to the roller 3 than to the longitudinal wire 1. This ensures that the pressure roller 4 does not work as a pure pressure roller with the possible disadvantages mentioned.

but always represents a drive roller for the longitudinal wire.

Claims (6)

20 1. Feed device for longitudinal wires on a Mesh welding machine, with a driven roller which rests on the longitudinal wires, and with a pressure roller which is arranged opposite the roller from the longitudinal wire, characterized in that the pressure roller (4) is also driven by a second driven roller (3), the pressure roller (4) being mounted so as to be movable from a rest position into a working position in which it rests both on the second driven roller (3) and on the longitudinal wire (1). 25 30 2. Feed device according to claim 1, characterized characterized in that the pressure roller (4) is mounted on a boom (7) in a freely swinging manner, the boom (7) being movable by means of a hydraulic, pneumatic or similar device (piston-cylinder arrangement 10) and being mounted about a pivot point (8) for a movement which brings the pressure roller (4) either into its rest position or into its working position. 35 3. Feed device according to claim 2, characterized characterized in that two different points of application (12) of the hydraulic, pneumatic or similar Drive device (piston-cylinder arrangement 10) are provided for the boom (7), and that two bearing points (bores 14) are also provided on the boom (7), with which the boom (7) can be pivotally mounted, such that in both different Mounting options for the drive device (piston-cylinder arrangement 10) with the same adjustment path of the drive device, the same path of the pressure roller (4) results due to the pivoting movement of the boom (7). 10 4. Feed device according to one of the preceding claims, characterized in that both the first driven roller (2) and the pressure roller (4) have a smooth surface. 5. Feed device according to one of the preceding claims, characterized in that the pressure roller (4) is mounted so as to swing freely. 6. Feed device according to one of the preceding Claims, characterized in that when the pressure roller (4) is arranged in its working position between the second driven roller (3) and the boom (7), a larger pressure force vector is present between the second driven roller (3) and the pressure roller (4) than between the Pressure roller (4) and the longitudinal wire (1).