EP1637670A1 - Rope loop device - Google Patents

Abstract

The cable loop assembly has a wire cable loop (2) and a box receptacle (3) for fitting over the side of the concrete structure. A spring element (6) acting on the cable eye (4) prevents the cable eye from spreading out from the box. The spring element can be a pretensioned bending spring (7) supported in the pretensioning direction against the base of the box.

Description

The invention relates to a cable loop arrangement for connecting or lifting concrete components with the features according to the preamble of claim 1.

Prefabricated concrete components such as walls or the like. Are poured into a formwork, and it may be appropriate to pour wire rope loops on side or end faces. After curing, the corresponding concrete component can be lifted at the cast-wire loops and transported to the installation site. Several appropriately executed concrete components can be connected to each other by means of wire rope loops.

From EP 0 819 203 B2 a cable loop arrangement is known in which a wire rope loop is held in a receiving box. The receiving box serves as a lateral formwork part, which is closed during the Vergussvorganges and covers the rope eye. In the closed state of the receiving box, the cable eye of the wire rope loop is bent in a rest position and approximately parallel to the bottom of the receiving box. After curing of the concrete material of the receiving box is opened. Then the rope eyes the wire rope loops spread out of the receiving box so far that they protrude from the adjacent surface of the concrete component or from the bottom of the receiving box. In this state, a connection with other components is possible. The spreading out of the cable eyes is laborious especially at tight bending radii of the rope loops. The position of the splayed-out cable eyes is insufficiently defined under the action of the elastic properties of the wire rope material. Once set by hand angular position of the wire rope loop is not reliably maintained during the subsequent assembly process.

The invention has the object of developing a generic cable loop arrangement such that the cable eye can be easily brought after the casting of the wire rope loop with the concrete material in a lifting or connecting position.

The object is achieved by a cable loop arrangement with the features of claim 1.

It is proposed a cable loop arrangement in which a force acting on the cable eye spring element for spreading out the cable eye is provided from the receiving box. During the process of potting the cable eye is biased by the force of the spring element and is held in this bent position in the receiving box. The wire rope loop is suitably supported in this position against a removable lid of the receiving box and protected against contamination by not yet cured concrete or the like. After curing of the concrete is only the lid of the receiving box to remove. The cable eye is self-adjusting under the action of the spring element and thereby automatically assumes a protruding from the receiving box position. If necessary, a transport or mounting position perpendicular to the adjacent surface or to the bottom of the box can be achieved by slight manual action. The spring element may be a compression or tension spring with or without a lever mechanism and is preferably designed as a prestressed bending spring. The spiral spring can be designed to save space and conform to the contour of the rope eye. There is hardly any additional space required. The receiving box can be designed accordingly small-volume and slim.

In an advantageous embodiment, the bending spring is supported in a biasing direction against the bottom of the receiving box. Additional attachment or support means are not required. It is given a simple structural design with low production costs. The bending spring may also be useful alternatively or additionally supported in the biasing direction against a support molding. This results in the possibility of a rigid connection of the spiral spring even with a thin-walled, flexible bottom of the receiving box, without the box assembly undergoes excessively high elastic deformations under the action of the biasing forces.

In an advantageous embodiment, the spiral spring is designed as a flat, thin-walled sheet steel spring. The thin-walled sheet metal version allows high, elastic degrees of deformation. The sheet metal spring requires only a small space. In particular, the sheet steel spring has a T-shaped contour, the free legs are each pressed against one of adjacent loop portions. Said shaping leads to a reliable frictional connection with the cable eye without covering the cable eye itself excessively. The cable eye remains sufficiently free for a subsequent lifting or mounting operation.

The sheet steel spring expediently has a slot into which a tongue of the receiving box engages. This results in a structurally simple and effective position fixation of the steel spring.

In an advantageous alternative embodiment, the bending spring is a wire spring, which in particular has a helical spring section. The coil spring section allows large degrees of elastic deformation. The slim design of the wire spring can be integrated into any box shape without additional space. The cable eye remains in the erected state substantially free of a cover by the spiral spring. There is unimpeded access to the rope loop for lifting or mounting purposes.

The bottom of the receiving box expediently has at least one passage opening, through which an associated section of the wire spring at least approximately free of play passed through. In addition to the bending support described above, a simple and effective position fixation of the wire spring is given. Alternatively or additionally, a positional fixation of the wire spring may be provided on the support molding, which in particular gives the possibility to functionally merge a positional fixation and a bending support with simple means.

The receiving box is advantageously designed as a profile extending in a longitudinal direction for receiving a plurality of wire rope loops. The profile can be used as a prepared unit with a variety held therein wire rope loops, for example, as a formwork element. The effort of fixing the position of the wire rope loops before the casting process is eliminated. After curing, for example, a consistently executed lid can be lifted in one operation, with all held underneath rope eyes automatically upright.

Fig. 1

in einer schematischen Seitenansicht ein Betonbauteil mit einem stirnseitig angeordneten Aufnahmekasten mit darin abgewinkelt gehaltenen und unter Federvorspannung stehenden Seilaugen;

Fig. 2

in einer vergrößerten Detailansicht den Aufnahmekasten nach Fig. 1 mit Einzelheiten einer auf das Seilauge wirkenden Biegefeder;

Fig. 3

in einer perspektivischen Darstellung die als Stahlblechfeder ausgeführte Biegefeder nach Fig. 2;

Fig. 4

in einer Querschnittsdarstellung die Anordnung nach Fig. 2 mit der am Seilauge anliegenden, T-förmigen Stahlblechfeder;

Fig. 5

in einer Längsschnittdarstellung eine Variante der Anordnung nach Fig. 2 mit einer gegen den Kastenboden abgestützten Stahlblechfeder;

Fig. 6

in einer perspektivischen Darstellung die Stahlblechfeder nach Fig. 5 mit Einzelheiten zu ihren Stützlaschen;

Fig. 7

eine Längsschnittdarstellung einer weiteren Variante zu den Anordnungen nach den Fig. 2 und 5 mit einer vollständig innerhalb des Aufnahmekastens liegenden Stahlblechfeder;

Fig. 8

eine perspektivische Darstellung der Stahlblechfeder nach Fig. 7 im entspannten Zustand;

Fig. 9

die Stahlblechfeder nach Fig. 8 im vorgespannten Zustand;

Fig. 10

eine Ausführungsvariante des Federelementes nach Fig. 1 als Drahtfeder;

Fig. 11

eine Längsschnittdarstellung des Aufnahmekastens im Bereich der montierten Drahtfeder nach Fig. 10;

Fig. 12

in perspektivischer Darstellung eine Variante der Drahtfeder nach Fig. 10 mit abgewinkelten Fixierabschnitten;

Fig. 13

in einer Längsschnittdarstellung den Aufnahmekasten mit der Drahtfeder nach Fig. 12;

Fig. 14

eine weitere Drahtfedervariante mit einem Bogenabschnitt zur Abstützung;

Fig. 15

eine Längsschnittdarstellung des Aufnahmekastens mit der Drahtfeder nach Fig. 14;

Fig. 16

eine Draufsicht der Anordnung nach Fig. 15 mit Einzelheiten des in einer bogenförmigen Haltenut aufgenommenen Bogenabschnittes.

Embodiments of the invention are described in more detail below with reference to the drawing. Show it:

Fig. 1

in a schematic side view of a concrete component with a front side arranged receiving box with it held angled and under spring tension cable eyes;

Fig. 2

in an enlarged detail view of the receiving box of Figure 1 with details of acting on the rope eye bending spring.

Fig. 3

in a perspective view of the running as a sheet steel spring bending spring according to Fig. 2;

Fig. 4

in a cross-sectional view of the arrangement of Figure 2 with the voltage applied to the cable eye, T-shaped sheet steel spring.

Fig. 5

in a longitudinal sectional view of a variant of the arrangement of Figure 2 with a supported against the bottom of the box steel spring.

Fig. 6

in a perspective view of the sheet steel spring of Figure 5 with details of their support tabs.

Fig. 7

a longitudinal sectional view of a further variant of the arrangements of Figures 2 and 5 with a lying entirely within the receiving box steel spring.

Fig. 8

a perspective view of the sheet steel spring of Figure 7 in the relaxed state.

Fig. 9

the sheet steel spring of Figure 8 in the prestressed state.

Fig. 10

an embodiment of the spring element of Figure 1 as a wire spring.

Fig. 11

a longitudinal sectional view of the receiving box in the region of the assembled wire spring of FIG. 10;

Fig. 12

in perspective view of a variant of the wire spring of Figure 10 with angled Fixierabschnitten ..;

Fig. 13

in a longitudinal sectional view of the receiving box with the wire spring of FIG. 12;

Fig. 14

another wire spring variant with a bow section for support;

Fig. 15

a longitudinal sectional view of the receiving box with the wire spring of FIG. 14;

Fig. 16

a plan view of the arrangement of FIG. 15 with details of the recorded in an arcuate retaining arc section.

Fig. 1 shows a side view of a concrete component 1, on the side surface of a receiving box 3 is arranged. The receiving box 3 can also be arranged on a front side and / or on a lower or upper side of the concrete component 1 and serves as part of a lost formwork for casting the concrete material. The receiving box 3 is part of a cable loop arrangement, in which a number of wire rope loops 2 is held on a bottom 5 of the receiving box 3. In the illustrated embodiment, each wire rope loop 2 is assigned a respective support molding 9. It can also, as shown in dashed lines, in the region of the support moldings 9 each have a further wire rope loop 2 'may be provided. The wire rope loops 2 have indicated free ends 10, which are concreted in approximately at right angles to the bottom 5 of the receiving box 3 in the concrete component 1. The receiving box 3 is designed as a profile 23 extending in a longitudinal direction, in which a plurality of wire rope loops 2 are held at predetermined distances from one another, of which only two are shown here for the sake of better clarity.

Each of the wire rope loops 2 has a cable eye 4, which is elastically bent approximately parallel to the bottom 5 and held parallel to this lying in the receiving box 3. The cable eyes 4 lie in a bent rest position and are each pressed by a spring element 6 against a removable cover 22 of the receiving box 3. The prestressed spring elements 6 are supported against the respective support molding 9.

Fig. 2 shows an enlarged longitudinal sectional view of a portion of the receiving box 3 of FIG. 1 in the region of a cable eye 4. The spring element 6 is designed as a spiral spring 7, the bending line runs approximately along the bent cable eye 4. The cable eye 4 is biased against the spring force of the spiral spring 7 in a direction indicated by an arrow 8 biasing direction and pressed in a direction indicated by an arrow 26 relaxation direction against the lid 22. A leg 27 of the spiral spring 7 is supported against an angled support surface 39 of the support molding 9.

When removing the lid 22, the spiral spring 7 expands the cable eye 4 in the relaxation direction 26 out of the receiving box 3 and holds it in an upright, for example, rectangular position relative to the bottom fifth

Fig. 3 shows in a perspective view of the bending spring 7 of FIG. 2, which is designed in the illustrated embodiment as a flat, thin-walled steel plate spring 13 with a T-shaped contour. The T-shaped contour of the sheet steel spring 13 is formed by a long leg 27 with laterally projecting free legs 14. In the end region of the long leg 27, a transverse slot 16 is provided. The spiral spring 7 is shown here in bent, prestressed form and is flat in the relaxed state.

Fig. 4 shows a cross-sectional view of the arrangement according to Fig. 2, according to which a tongue 17 of the bottom 5 at least approximately free of play engages in the slot 16 of the spiral spring 7. The bending spring 7 is fixed in position relative to the receiving box 3. The cable loop 4 has two adjacent loop portions 15 against which the two free legs 14 of the spiral spring 7 are pressed from below. Under the action of the two legs 14, the cable eye 4 is pressed in the region of its two adjacent loop portions 15 against the cover 22 under bias. The lid 22 and the bottom 5 each have laterally angled spring tongues 24, 25, which engage resiliently and positively. The elastically resilient holding force of this connection is such that the cover 22 is not affected by the action of the spring force of the bending spring 7 Bottom 5 is blasted off, but can be removed manually, for example, with a screwdriver or with another tool from the bottom 5.

According to FIG. 5, a variant of the arrangement according to FIG. 2 is provided, in which the sheet steel spring 13 has support tabs 29, 30. The sheet steel spring 13 is supported by means of the support tabs 29, 30 in the biasing direction 8 against the bottom 5 of the receiving box 3. The pointing away from the cable eye 4 support tabs 30 are on the outside and the cable eye 4 facing support tab 29 on the inside of the bottom 5 at.

The steel plate spring 13 according to FIG. 5 is shown in FIG. 6 in perspective in the deformed, prestressed state, accordingly a total of two support straps 30 are arranged in a forked manner on the outside of the central support strap 29. The free ends 10 of the cable eye 4 (FIG. 5) extend between the two fork-shaped support tongues 30.

Fig. 7 shows a further embodiment of a cable loop arrangement in which the steel plate spring 13 is completely within the receiving box 3 and engages with two legs 31 in associated slots 32 of the support molding 9. The sheet steel spring 13 is supported by its legs 31 and the slots 32 in the biasing direction 8 against the support molding 9.

Fig. 8 shows a perspective view of the sheet steel spring 13 of FIG. 7 in the relaxed state, accordingly the main body of the sheet steel spring 13 rises approximately at right angles from the two fork-shaped legs 31. In this relaxed state, the cable eye 4 is also spread out of the receiving box 3 approximately at right angles to the bottom 5 (FIG. Fig. 9 still shows the sheet steel spring 13 of FIG. 8 in the bent prestressed state, as it is installed in Fig. 7 in the bent state of rest of the cable eye 4 in the receiving box 3.

According to Fig. 10, an embodiment of the bending spring 7 is provided as a wire spring 18, wherein the wire spring 18 has a central, U-shaped portion 34. Each side of a coil spring portion 19 is arranged, followed by the free legs 33.

Fig. 11 shows a portion of the receiving box 3 with the mounted biased wire spring 18 of FIG. 10, which surrounds the cable eye 4 in its U-shaped portion 34. The two legs 33 are passed through the bottom 5 of the receiving box 3 and lie flat on the ground 5 on the outside. The wire spring 18 is thus supported in the biasing direction 8 against the bottom 5.

12, a variant of the wire spring 18 of FIG. 10 is provided, in which the two legs 33 are bent in the opposite direction to the U-shaped section zuweisend. Of the legs 33 each have a portion 21 is angled at right angles down.

Fig. 13 shows the receiving box 3 with a spring spring 18 inserted therein biased according to FIG. 12. The bottom 5 has through openings 20 through which the associated portions 21 of the wire spring 18 are passed at least approximately free of play. The sections 21 together with the lead-through openings 20 a spatial positional fixation of the wire spring 18, while the wire spring 18 is supported by means of the voltage applied to the inside of the bottom 5 legs 33 in the biasing direction 8 against the bottom 5.

14, another embodiment of the wire spring 18 is provided, which is bent into a closed annular structure, wherein a joint 36 of the bent wire is located centrally in the U-shaped portion 34. Opposite the U-shaped section 34, the wire spring 18 has an arc section 37.

The wire spring 18 of Fig. 14 is shown in the installed state in Fig. 15, according to which the arc portion 37 is passed through the bottom 5 and disposed on the outside thereof. The support molding 9 has an arcuate holding groove 38 adapted in the contour to the arc section 37, in which the arc section 37 is held in a form-fitting manner. The wire spring 18 is thus both fixed in position and supported in the biasing direction 8.

FIG. 16 also shows the arrangement according to FIG. 15 in a view from below, according to which the curved section 37 is led through recesses 35 in the base 5. The arcuate Halteut 38 of the support form part 9 and the arc portion 37 of the wire spring 18 are made approximately semicircular and engage in a form-fitting manner.

Claims (13)

Cable loop arrangement for connecting or lifting concrete components (1), comprising at least one wire rope loop (2) and a receiving box (3) provided for lateral positioning on the concrete component (1), wherein a wire eye (4) of the wire rope loop (2) in a bent position in the receiving box (3) is approximately parallel to the bottom (5),
characterized in that on the cable eye (4) acting spring element (6) for spreading out of the cable eye (4) from the receiving box (3) is provided. Cable loop arrangement according to claim 1,
characterized in that the spring element (6) is a prestressed bending spring (7). Cable loop arrangement according to claim 2,
characterized in that the bending spring (7) in a biasing direction (8) against the bottom (5) of the receiving box (3) is supported. Cable loop arrangement according to claim 2 or 3,
characterized in that the bending spring (7) is supported in the biasing direction (8) against a support molding (9). Cable loop arrangement according to one of claims 2 to 4,
characterized in that the bending spring (7) is a flat, thin-walled steel plate spring (13). Cable loop arrangement according to claim 5,
characterized in that the steel sheet spring (13) has a T-shaped contour, the free legs (14) are each pressed against one of adjacent loop portions (15). Cable loop arrangement according to claim 5 or 6,
characterized in that the sheet steel spring (13) has a slot (16) into which a tongue (17) of the receiving box (3) engages. Cable loop arrangement according to one of claims 2 to 4,
characterized in that the bending spring (7) is a wire spring (18). Cable loop arrangement according to claim 8,
characterized in that the wire spring (18) has a coil spring portion (19). Cable loop arrangement according to claim 8 or 9,
characterized in that the bottom (5) of the receiving box (3) has at least one passage opening (20) through which an associated portion (21) of the wire spring (18) is guided at least approximately free of play. Cable loop arrangement according to one of claims 8 to 10,
characterized in that the wire spring (18) is fixed in position on the support molding (9). Cable loop arrangement according to one of claims 1 to 11,
characterized in that the wire rope loop (2) in the bent position against a removable cover (22) of the receiving box (3) is supported. Cable loop arrangement according to one of claims 1 to 12,
characterized in that the receiving box (3) as a longitudinally extending profile (23) for receiving a plurality of wire rope loops (2) is formed.

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