DE2152479A1 - Method and device for applying an elastic pull strip - Google Patents

Description

2152479 PATENTANWÄLTE 8902 augsburg-göggingen, December 20th 1971

v. Eidiendorff- Strasse 10

DR. Ι NG. E. 11E BAU ■ _{Un "March. ith} , _{n Dr. Lb / p} j ₈₅₇₈ DIPL.ING.G.LIEBAU · ^IB « ^R " * ° "-""» »· " ■ * <>"■>

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Industrie- en Handelsonderneming Elton N, V. 2nd energy path 5
Roden / Netherlands

Method and device for applying an elastic pull strip.

The invention relates to a method for attaching an elastic pull strip from. Rubber or plastic material in a groove of a strip which is made of a substantially rigid material and of metal, wood or plastic is prepared, which pull tab is pressed with its profiled g foot into the groove by means of a rotatable element, wherein the peripheral speed of the rotatable element is equal to which is maintained or greater than the linear velocity of the bar. A similar working method is known from Dutch patent 79 45 8. This known method involves inserting a dovetail-shaped foot of an elastic strip into a dovetail-shaped groove. For this purpose the foot is used in a special way

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Telegr.-AeV. ·. ELPATENT postal check account Munich 84510 Deutsche Bank Augsbure account 08/34192

brought over the groove and pressed into this with a washer which extends into the groove. When the arrangement is taken so that the rotatable element rotates a little faster than the propulsion ge sclwindigke it corresponds to the bar, a longitudinal pressure is achieved on the elastic material of the tension strip in the groove ensure that there is always a sufficient length of elastic material in the bar If the bar is sawn to a certain length, it is practically impossible that the elastic material underneath the effect of the tensile forces in the material has a shorter length than the bar, as this would lead to gaps. However, this disadvantage occurs when the elastic material is drawn into the groove.

The object of the invention is to create a method with a simplified mode of operation, but with the advantages the known working methods.

This goal is achieved according to the invention in that the Strip is provided with a foot, which has a cross-section in the shape of a spear and this foot in the way over the groove is brought to ensure that the symmetry planes of the groove and the foot coincide, whereupon the foot is rolled into the groove by the rotatable element, which rotatable element is indirectly rolled onto the foot acts through the tension strip itself in the plane of the aforementioned coincident central planes.

A foot in the shape of a spear is a foot that is tapered in cross section. This foot is now standing so in pressed the groove that at the same time an elastic compression of the material in the depth direction of the groove together with the required degree of longitudinal

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pressing of the material in the longitudinal direction of the groove is achieved, resulting in an expansion of the elastic Strip material leads, so that this is fixed in the groove itself. ^

This is why the groove is also an ordinary one rectangular cross-section with a width that is larger than the narrowest part of the foot, but smaller than the widest part of the foot.

It is also possible to provide the groove with a narrowed inlet \

which is narrower than the greatest width of the foot, so that the foot is fixed in the groove in a way which is comparable to the effect of a dovetail »

Before introducing the foot into the groove, however, it is no longer necessary to put this foot in a flat position above to bring the groove »as is the case with the known method, but he can stand with his narrowest end arranged in the groove and then pressed into the groove.

The invention is also directed to a device

those made of guideways for a bar and a strip ^ and consists of two rollers, the axis of rotation of which is directed transversely to these tracks and of which one with its The circumference of the guide track for the bar rests, while the other above the same at an adjustable distance is arranged, which latter roller can be driven while the former is decelerated by a brake v / can earth.

The invention is described in more detail below in connection with the accompanying drawing, which shows a schematic

2 0 M 8 BI / 0 Π 3 5

ÖAD ORIGINAL

see representation of the subject matter of the invention, and although show

Fig. 1 is a side view and

Fig. 2 is a view, partially in section, of the position of the roll neck.

In Fig.l a guide track 1 is shown for a pull bar 2, which web is provided with a recess through which a roller 3 extends, which against the The bottom of the bar.

With 4 a V-shaped guide for the strip 5 is off called elastic material.

Above the roller 3, a roller 6 is arranged, which in can be adjusted in a vertical direction in a manner not shown.

As can be seen from Fig. 2, the applied tension strip has a hollow round part 7 and a spearförndgen, tapered foot 8 on.

The strip S is guided through the guide 4 with your foot. 8th guided in the groove 9 of the bar 2 and then pressed into this from above by the roller 6, the elastic Material is compressed in the longitudinal direction, which can happen at the same time that the roller 6 is braked.

Expectations;

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Claims (1)

Expectations Method for inserting an elastic tension strip made of rubber or plastic into a groove of a Bar made from a much stiffer material such as metal, wood or plastic ™ which tension strip with its profiled foot is pressed into the groove by means of a rotatable element whose peripheral speed is equal to or greater than the linear speed of the bar, characterized in that the strip is provided with a foot which has the shape of a spear in cross-section and is guided above the groove in such a way that the coincidence of the central planes of symmetry of the groove and the foot is ensured, whereupon the foot is rolled into the groove by the rotatable element, which collapse on the foot indirectly through the tension strip itself in the plane of the aforementioned A acts on the central planes. 2 · pull bar, characterized in that this by the Application of the method according to claim 1 has been obtained. 3, pull bar according to claim 2, characterized in that the groove is rectangular in cross section and one width which is larger than the narrowest part of the foot of the 0 9 8 5 3/0535 Strip is, however, smaller than the widest part of this foot. Pull bar according to Claim 2, characterized in that the groove has a narrowed inlet which is narrower as the greatest width of the foot, expressed in cross-section, is. 5, device for carrying out the method according to claim 1, characterized by guide tracks (1, 4) for a bar (2) and a strip (5), two rollers (3, 6), the axis of rotation of which is transverse to these tracks is arranged, of which rollers one roller (3) extends with its circumference in the path (1) of the bar (2) is located, while the other roller (6) is arranged above the bar at an adjustable distance, which latter roller can be driven while the former can be decelerated. 209853/0535