CH686792A5 - Partly-elastic spring anchor between building components - Google Patents

Abstract

Between two anchoring end sections (1,1') is a strip-type connecting section (2). This is elastic mainly in the transverse direction. Part at least of the connecting section forms a mirror-image round the transverse plane (E). On its lengthwise axis (L), it is twisted at successive points and in opposite directions, so that the twists cancel each other out.The material and twisting are so selected as to give elastic extension of the anchor. The portion (3) of the connecting section can form a double spiral, so that twisting takes place for equal amounts at successive positions, pref. through no more than 90 deg.

Description

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CH 686 792 A5

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The present invention relates to a partially elastic spring anchor according to the preamble of claim 1, which remains substantially stable in its longitudinal direction to compressive and tensile stress, on the other hand has a certain flexibility or elasticity in as many transverse directions as possible.

In the field of civil engineering, elastic connection elements such as the spring anchors mentioned are used, for example for connecting wall shells of a double-shell masonry, which hold the shells together at a certain distance and also allow the shells to be displaced to one another to a certain extent. In this way, physical influences such as heat, pressure, slipping, setting, creeping, vibration, shrinkage and the like can be used to prevent gross damage from tensions and / or cracks in the masonry.

In practice, however, it has been found that spring anchors, which allow good mobility in all directions - as described for example in CH-PS 441 679 - can under certain circumstances lead to undesired vibrations, in particular transverse vibrations, which subsequently contrary to the intended protective effect - can cause damage in the form of cracks, tears or even breaks. Consequently, vibration dampers had to be introduced in order to remedy the existing shortcomings.

In CH-PS 643 024 spring anchors are described which already take into account the fact that the wall anchors are too flexible as they keep the wall shells to be connected at a significantly improved, almost constant longitudinal distance from each other, but still a certain lateral Allow parallel displacement of the wall elements against each other. This property is achieved by spiraling the middle part of the spring anchor in the longitudinal direction by 360 °.

By rotating the center piece in only one direction of rotation, a disadvantage is created at the same time, which leads to the fact that the longitudinal forces acting are diverted in a preferred direction of rotation, so that strong torsional forces act on the end parts of the spring anchor anchored in the masonry, especially in the event of strong tensile loads in the longitudinal direction forcing an undesired rotational movement of the spring anchor in the components to be connected, which may lead to damage to the masonry, poorer connection quality and in extreme cases even to loosening the anchor in the mortar.

However, this deficiency is advantageously eliminated by a spring anchor, as described, for example, in the present invention. The invention has for its object to provide a simple and inexpensive to manufacture spring anchor that connects two components, for example two wall shells, so that the two components are kept at a largely constant distance from each other on the one hand and on the other hand relatively in a parallel plane in the required frame are somewhat movable or displaceable relative to one another, however, when tensile forces occur along the longitudinal axis, as far as possible no torsional forces act on the end parts of the spring anchor and thus no counter-rotational movements of the spring anchor are forced.

This is made possible by a design of the spring anchor, as shown for example in the characterizing part of claim 1. Due to the fact that the spring anchor within the connecting part, which connects the end parts of the spring anchor, contains at least one mirror-symmetrically constructed area with special twist characteristics, any force acting in the longitudinal direction is derived in the opposite direction above and below the plane of symmetry, whereby a rotational movement in a preferred torsion direction is effectively reduced against each other. This is because, on the one hand, the angle of twist within the connecting part is a maximum of 270 ° and, on the other hand, unscrewing a spiral-like twist - as in the present invention - requires less effort than further screwing in such a spiral-like twist.

Advantageous embodiments and further developments of the invention are described in the dependent claims.

The degree of elasticity and flexibility of the spring anchor can be controlled as desired by the width and strength of the band-like connecting part, as well as by the extent of the rotation of at least one part of the connecting part along the longitudinal axis. The rotation of the part or parts of the connecting part should, however, be at most 270 ° in order not to excessively increase the sideways mobility (transverse mobility) at the expense of the longitudinal stiffness of the spring anchor. An embodiment which takes this fact into account in an excellent manner is described in claim 2.

Further possibilities of achieving desired properties with regard to shear and tensile strength with simultaneous elasticity and flexibility in transverse directions are successfully created by one of the embodiments according to the invention, as formulated, for example, in claims 3 to 8. Due to the length of the mirror-symmetrical part of the connecting part and the angle of the respective longitudinal rotation, the flexibility or shear and tensile strength desired for the intended application can also be set in this case with simple means.

Another advantage of these embodiments according to the invention is that by splitting the at least one mirror-symmetrical part of the connecting part and adjusting the angle of rotation of the regions separated from one another by gaps or slots and / or by milling, grinding or pressing them flat to the thickness of the spring anchor, one uniform over the entire length of the spring anchor

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Thickness results. This makes the packaging of the spring anchors significantly easier for storage and transport.

Bending the spring anchor from a single piece of corrosion-resistant metallic band material ensures both extremely simple manufacture and a uniform distribution of the longitudinal and transverse forces acting. The same properties can also be found in spring anchors, which were obtained by casting them into corresponding shapes. These characteristics are a preferred part of all spring anchors described in the present invention.

The drawings explain the invention on the basis of schematically illustrated embodiments, to which the invention is, however, not restricted. Show it:

Fig. 1: a spring anchor in front and side view, consisting of two end parts 1 and 1 'and a connecting part 2, wherein a part 3 within the connecting part 2 is rotated twice in succession with opposite orientation by a maximum of 90 ° in the longitudinal direction and wherein sections 7 and 8 of part 3 are mirror-symmetrical to one another with respect to a central plane E perpendicular to the longitudinal axis L.

Fig. 2: a spring anchor in front and side view, consisting of two end parts 1 and 1 'and a connecting part 2, wherein a mirror-symmetrical part 3 of the connecting part 2 is divided into two separate band parts 3a, 3b, which in the longitudinal direction twice in succession by maximum -90 ° or + 90 ° rotated with respect to the rest of the connecting part 2 and separated by a gap or slot S.

Fig. 3: a spring anchor in front and side view, consisting of an end part 1 and two end parts 1a, 1a ', and a connecting part 2, wherein a mirror-symmetrical part 3 of the connecting part is divided into two separate band parts 3g, 3h, in which - mainly For a better illustration of the various design options - band part 3g is rotated twice in succession by a maximum of 90 ° in the longitudinal direction and band part 3h twice in succession by a maximum of 180 °, in each case in the opposite direction, and in which the two band parts 3g and 3h are separated from one another by a gap S. are, so that each of these separate band parts opens into a separate end part 1a or 1a '.

Fig. 4: a spring anchor in front and side view analogous to Fig. 1, consisting of two end parts 1 and 1 'and a connecting part 2, in this embodiment a part 3 within the connecting part 2 twice in succession by a maximum of 180 °, each in opposite direction, is twisted.

The partially elastic spring anchor according to claim 1 consists of two end parts 1, 1 'and a band-like connecting part 2, which contains at least one part 3, which has a rotation and backward rotation to the same extent in the longitudinal direction and which has the sections 7 and 8 in relation to one Center plane E perpendicular to the longitudinal axis L is mirror-symmetrical.

According to an embodiment of the invention, as described in claim 2, the band-like connecting part 2 contains at least one part 3, which at least twice in succession by a maximum of 270 ° - for example by 90 ° as in FIG. 1 or by 180 ° as in FIG. 4 shown - is rotated along the longitudinal axis, in the opposite direction.

The forces acting on the spring anchor, in particular the transverse forces, are derived diagonally via the axes of rotation or torsion D and transversely via the buckling planes K. In this way, the desired transverse mobility of the connected components parallel to one another is possible without, however, preferring any direction or causing forced rotations of the end parts or at least one of the end parts of the spring anchor by tensile stress.

In the embodiment according to claims 3 and 4, the band-like connecting part 2 contains at least one part 3 which is divided into at least two band parts 3a, 3b and in which these band parts are rotated in the longitudinal direction in the same or opposite direction by a maximum of 90 °, the band parts - As shown in Fig. 2 - can be separated from each other by a slot S.

In these embodiments according to the invention, too, the acting longitudinal and transverse forces are derived in all required directions via the axes of rotation or torsion D and via the buckling planes K.

In the embodiments according to claims 5 and 6, the spring anchor consists of an end part 1, a band-like connecting part 2, which contains at least one part 3, which is divided into at least two band parts 3g, 3h and in which at least one of the band parts at least twice in succession by a maximum 270 ° is rotated in the opposite direction along the longitudinal axis and the two band parts can be separated from each other by a gap or slot S and either together in another end part 1 'or - as shown in FIG. 3 - separated from each other in two end parts 1a, 1a 'open.

Claims (6)

Claims 1. Spring anchor for the partially elastic connection of two components, consisting of at least two end parts serving for anchoring (1, 1 'or 1a, 1a') and an intermediate, mainly transversely elastic, band-like connecting part (2), characterized in that at least a part (3) of the connecting part (2) is mirror-symmetrical with respect to a central plane (E) perpendicular to its longitudinal extension and this at least one part (3) in its longitudinal axis (L) at least twice in succession - in opposite directions Direction is twisted, so that in total the twists essentially cancel each other out, and so that the material of the spring anchor and the twist 5 10th 15 20th 25th 30th 35 40 45 50 55 60 65 3rd 5 CH 686 792 A5 are chosen so that an extension of the spring anchor is possible resiliently. 2. Spring anchor according to claim 1, characterized in that the at least one part (3) of the connecting part (2) has a double spiral-like shape, which by rotating a section 7 of the part (3) by a maximum of 270 °, preferably a maximum of 180 °, in particular by a maximum of 90 °, and backward rotation of a subsequent section (8) of the part (3) to an essentially equal extent, but in the opposite direction, was obtained (FIGS. 1 and 4). 3. Spring anchor according to claim 1, characterized in that the at least one part (3) of the connecting part (2) is divided into at least two longitudinally extending band parts (3a, 3b; 3b, 3h), preferably by at least one column or one Slot (S) are separated (Fig. 2 and 3). 4. Spring anchor according to claim 3, characterized in that the longitudinally extending band parts (3a, 3b) along the longitudinal axis (L) are rotated at least twice to the same extent, but at most by 90 °, in each case in the opposite direction (FIG. 2 ). 5. Spring anchor according to claim 3, characterized in that each of the longitudinally extending band parts (3g, 3h) along its longitudinal axis (L) is rotated at least twice to the same extent, but at most by 270 °, in each case in the opposite direction (Fig. 3). 6. Spring anchor according to claim 5, characterized in that each of the band parts (3g, 3h) separated by columns or slots (S) merges into a separate end part (1a, 1a ') (Fig. 3). 5 10th 15 20th 25th 30th 35 40 45 50 55 60 65 4th