DE102019102163A1 - Sleeve transport anchor with cross hole - Google Patents

Abstract

Transport anchor (100) for a concrete component (500), which has the following:
- A connecting sleeve (200) with a transverse hole or another transverse passage (203) running transversely to the longitudinal direction of the sleeve, the connecting sleeve (200) being designed for the stop or engagement on or with an external load-carrying means, and
- A reinforcing strand (305) assigned to the concrete part (500), which is guided through the transverse passage (203) of the connecting sleeve (200), the reinforcing strand (305) on the connecting sleeve (200) by means of one or more welded connections or one or more other Connection means (400) is fixed.

Description

The invention relates to a transport anchor for concrete elements with a connecting sleeve with a transverse hole or another transverse passage running transversely to the longitudinal direction of the sleeve, the sleeve being designed for the stop or engagement on or with an external load-carrying means, and with a reinforcing strand assigned to the concrete part, which passes through the transverse passage of the connecting sleeve. The invention also relates to a method for producing such a transport anchor.

Reinforced concrete consists of a reinforcement cage that is completely poured out and covered with concrete. The tensile strength of the steel and the compressive strength of the concrete result in the high stability of this structure. The reinforced concrete for a component is produced by plugging the reinforcement cage within a formwork that is adapted to the shape of the component. This formwork is then poured out with concrete, which hardens in the formwork. From the place of manufacture, reinforced concrete components may have to be lifted to their destination even after using load cranes. To enable this transport, transport devices, so-called transport anchors, are cast into the reinforced concrete. These transport anchors must be able to transport these high loads and must not pose any risk of accidents, e.g. by pulling out or pulling the anchors out of the concrete when lifting them with a crane. The transport anchors must be suitable for loads in a direction perpendicular to the concrete surface (axial pull), but also at an angle to the level of the concrete surface (inclined pull).

An important criterion for such transport anchors is also simple and inexpensive to manufacture, and quick assembly.

The patent publications describe the prior art DE 2 325 483 A a parapet slab made of concrete, for example for balconies. In this case, a plurality of support sleeves with an internal thread are arranged in the region of the upper longitudinal edge of the plate. The support sleeves have transverse holes and are penetrated by parts or rods of the reinforcement. The inserted reinforcement can be bent or bent several times at an angle. The disadvantage is that the reinforcement parts are only inserted through the support sleeves at the construction site and the transport anchor arrangement is configured in this way.

Transport anchors for double or multiple concrete walls with opposite concrete shells are particularly easy to manufacture DE 10 2017 102 910 A1 shown, the anchoring legs are formed as part of an outer belt which forms an outer frame, border or border. The lifting anchor can be produced by bending a single reinforcement strand to form a closed geometry.

The object of the present invention is to improve the prior art, in particular the producibility and installation of a generic lifting anchor. To solve this, the transport anchor specified in claim 1 and the method for producing such a transport anchor specified in claim 10 are proposed. Advantageous, optional embodiments are claimed in the subclaims.

Accordingly, the claimed invention comprises a transverse hole transport anchor sleeve with at least one reinforcement strand for anchoring in the concrete part. The sleeve is used for connection to a load suspension device ("connection sleeve"). The reinforcement strand passes through the transverse hole or the transverse passage of the connecting sleeve and is immovably fixed to it, resulting in a transport anchor that can be directly installed or installed in the concrete part. This is also easy to manufacture before use, because only the connecting sleeve and the preferably one-piece reinforcement strand are to be arranged and connected as necessary components.

The ease of manufacture is further promoted in that the connection means or connections, in particular welded connections, are arranged in or at the openings of the cross passage or cross hole, where there is easy access for processing.

Another optional development of the invention consists in the reinforcement strand being bent, curved or kinked once or several times in such a way that it preferably surrounds the connecting sleeve at a distance. A ring shape or a curve-like curve is preferred as the contour or course for the reinforcement strand. In particular, if the reinforcement strand runs around the connecting sleeve in a ring shape at a distance, large-area reinforcement is achieved in the concrete part and a correspondingly enlarged breakout cone is achieved for the concrete part. Furthermore, a symmetrical load distribution can be realized, in particular if the connecting sleeve is arranged in the middle of the reinforcement ring.

Another advantage of the reinforcement strand surrounding the connecting sleeve in a ring-like manner is that it is independent of the direction. When installing the ring sleeve anchor according to the invention does not need to pay attention to a certain, particularly favorable orientation of the reinforcement strand within the concrete part.

A preferred embodiment of the invention consists in that the reinforcement strand completely, preferably ring-like, surrounds the connecting sleeve and is made from a strand piece or in one piece. The strand end (s) are applied and fixed on a respectively assigned strand region between the two strand ends. Part of the reinforcement strand forms a ring-like border, the spanned or enclosed surface of which runs perpendicular to the central axis of the connecting sleeve. As a result, the entire reinforcement can be covered with concrete even at a low immersion depth in the concrete element. When the concrete element is lifted on the transport anchor according to the invention, the resulting forces are largely and evenly diverted into the concrete element, and concrete breaking or chipping as a result of stress peaks is avoided. This means that even flat slab concrete elements can be lifted on their flat side with axial pull or inclined pull, without the concrete reinforcement covering falling below the transport reinforcement. Alternatively, the outer border or border and / or the surface enclosed by the outer border or border or a turn of a curved or curved strand section can also be aligned with an oblique angle with respect to the central axis of the load-bearing means.

A structure according to the invention for the reinforcement strand is to subdivide it into a first strand section which runs through the transverse passage and a second strand section which adjoins it via a transition region and which is guided completely or partially around the connecting sleeve. A simple or inexpensive production can be achieved if the two sections are formed from a single strand piece or in one piece. In the sense of the symmetrical load distribution to be aimed for, the connecting sleeve is preferably arranged in the middle or in the middle region of the first strand section.

In a further development of the idea of the division into two strand sections, one end of the first strand section passing through the connecting sleeve or of the reinforcement strand is fixed to the second strand section surrounding the connecting sleeve, away from the transition region from the first to the second strand section. Alternatively or additionally, one end of the second strand section, which surrounds the connecting sleeve, is fixed at the transition region from the first to the second strand section. In particular if the fixing point of the end of the first strand section is arranged approximately in the middle of the second strand section, a diametrically extending bracing and thus additional stabilization of the ring-like reinforcing strand is achieved.

According to an optional embodiment of the invention, the reinforcement strand or the second strand section runs according to an imaginary, helical or screw-like line, as is realized, for example, in tension springs. A single turn gradient can in principle be sufficient. In a further development of this idea, the one or more winding pitches suitably each correspond to the diameter and / or the thickness of the reinforcement strand.

If the winding pitch or pitch corresponds to the diameter of the reinforcement strand, it can be made easier to manufacture the sleeve anchor according to the invention; because then the strand ends can be placed on strand regions assigned for their fixing in opposite directions, each of which runs parallel to a longitudinal axis of the sleeve. It is preferably placed on one or both of the assigned strand areas with the latter overlapping over a large area. The advantage achieved in this way consists in a widened connection point with correspondingly increased strength and lower accuracy requirements. When the concrete part provided with a transport anchor according to the invention is raised, it can be achieved that the second strand section is gripped behind or underneath by the first strand section and the first strand section, which is coupled to the connecting sleeve, is pressed against the second strand section. This prevents the reinforcement from being pulled apart like a spiral spring along its tension axis.

According to a further optional embodiment of the invention, the winding slope of the second strand section surrounding the connecting sleeve ends in the first strand section which is guided through the connecting sleeve and is preferably designed in a straight line. This makes it easier to push the first strand section through the transverse hole of the connecting sleeve, which makes production easier.

Within the scope of the general inventive idea is a manufacturing method for the transport anchor according to the invention, in which a connecting sleeve with a transverse hole and a reinforcement strand, divided into a first and a second strand section, are processed. Preferably, in a bending machine known per se, the first strand section in the reinforcement strand is bent or angled in accordance with the manufacturing method according to the invention and provided with a largely linear course. Furthermore, the second strand section a curved, curved or kinked course. A transition region bent at an angle is created between the first and the second strand section.

After these bending operations, the first strand section is pushed through the transverse hole of the connecting sleeve and then firmly connected to the connecting sleeve, forming a weld or other connection point.

According to an expedient embodiment of the method according to the invention, the first strand section is bent, for example at right angles, at the transition region and is guided approximately through the center of a ring reinforcement, as which the second strand section is preferably designed. The transverse hole of the connecting sleeve is expediently arranged in the region of the center point and can thus accommodate the first strand section.

• 1 einen Bewehrungsstrang des erfindungsgemäßen Transportankers, dargestellt in einem gedachten, eben abgewickelten Zustand
• 2 den Transportanker in perspektivischer Darstellung, in
• 3a den Transportanker gemäß 2 in einer ersten radialen Seitenansicht, in
• 3b den Transportanker gemäß 2 in einer zweiten radialen Seitenansicht, in
• 3c den Transportanker gemäß 2 in einer Draufsicht, in
• 4 eine beispielhafte Anordnung mit dem Transportanker in einer Schnittansicht und in
• 5a-5d beispielhafte Ausgestaltungen der äußeren Umrandung.

Further details, features, feature (sub) combinations, advantages and effects based on the invention result from the following description of a preferred embodiment of the invention and the drawings. These show in

• 1 a reinforcement strand of the transport anchor according to the invention, shown in an imaginary, just developed state
• 2nd the lifting anchor in perspective, in
• 3a the transport anchor according to 2nd in a first radial side view, in
• 3b the transport anchor according to 2nd in a second radial side view, in
• 3c the transport anchor according to 2nd in a top view, in
• 4th an exemplary arrangement with the lifting anchor in a sectional view and in
• 5a-5d exemplary configurations of the outer border.

1 shows a flat or straight reinforcement strand for better understanding and overview 305 that when used in a concrete part 500 (please refer 4th ) to reinforcement 300 for a transport anchor according to the invention 100 (see. 2nd ) is bent several times. The reinforcement strand 305 is preferably a smooth or ribbed reinforcement wire with a constant diameter 317 and essentially circular cross-section and can be cut to length from a coil known per se. It has an overall length 316 from a first strand end 313 to a second strand end 314 on. The sections and ends described below are in 1 to be understood as imagined areas and indicated with dashed lines. The reinforcement strand 305 is according to 1 (conceptually) in at least two strand sections, namely a first, shorter strand section 310 and a second, longer strand section 311 divided. Between the first strand section 310 and the second strand section 311 is a transitional area 312 , in the 3-dimensional realization a bending point, arranged where the first strand section 310 and the second strand section 311 are bent or kinked relative to each other. The first strand end 313 is a subsection of the first strand section 310 and the second strand end 314 is a subsection of the second strand section 311 .

According to 2nd is the reinforcement strand 305 (see. 1 ) to an approximately circular reinforcement 300 bent and to form a transport anchor 100 with a connecting sleeve 200 welded. The connecting sleeve 200 is an essentially circular cylindrical threaded sleeve with a sleeve body 201 and a section with an internal thread 202 educated. There is also a transverse hole 203 as a through hole through the sleeve, transverse to the hole for the internal thread 202 intended. To form the lifting anchor 100 is the first strand section 310 in the cross hole 203 the connecting sleeve 200 inserted and fixed to the latter. In other words, the connector sleeve 200 is over their cross hole 203 is on the first strand section 310 postponed. This is the diameter of the hole for the cross hole 203 greater than or equal to the diameter 317 (see. 1 ) of the first strand section 310 . The second strand section 311 is opposite the first strand section 310 at the transition area 312 bent or kinked. Then there is the second strand section 311 forming a ring-like border 301 around the connecting sleeve 200 with a radial distance from it, so that the connecting sleeve 200 located in an area surrounded by the outer border 301 is surrounded, enclosed and / or limited. To stabilize the reinforcement 300 for the installation of the transport anchor 100 the end of the strand is in a concrete part 313 of the first strand section 310 or the reinforcement strand 305 (see. 1 ) with the second strand section 311 with the formation of a second connection point 402 , and the (second) strand end 314 of the second strand section 311 or the reinforcement strand 305 (see. 1 ) with the transition area 312 with formation of a first connection point 401 connected. Both connection points 401 , 402 are realized according to the exemplary embodiment by weld joints which overlap in a planar manner. There is also a welded joint 400 between the reinforcement strand 305 and the connecting sleeve 200 , preferably between the first strand section 310 and the inner wall of the transverse hole 203 or. an entrance area of the transverse hole 203 the connecting sleeve 200 intended.

3a shows in a side view that the outer border 301 (see. 2nd ) or the second strand section 311 with at least one turn around the connecting sleeve in the manner of a tension spring 200 is led. As from 2nd can be seen, the second strand section 311 right on the strand end 313 in the first strand section 310 and the strand end 314 in the second strand section 311 directly on the transition area 312 between the first and the second strand section, preferably laid flat overlapping or laid flush or touching. A winding pitch suitably corresponds to the diameter 317 or the thickness of the reinforcement strand 305 (see. 1 ). In other words, the ring border points 301 over a single turn a mean slope α, this slope α with the tangent function by the ratio of the diameter 317 and the length 316 of the reinforcement strand 305 is determinable or can be calculated.

3b shows in a further side view that the connecting sleeve 200 in the middle of the first strand section 310 , in the middle between the first strand end 313 and the transition area 312 is arranged. So that is the connecting sleeve 200 with its longitudinal axis approximately congruent with a central axis 303 of the lifting anchor 100 arranged. All connection points are also in this view 400 , 401 , 402 , the connection point 401 between the curved transition area 312 and the second strand end 314 (see also 2nd ), the connection point 402 between the first strand end 313 and the second strand section 311 , as well as the connection point (s) 400 between the first strand section 310 and the connecting sleeve 200 shown.

3c shows in a top view that the outer border 301 forms an annular reinforcement, which is drawn on a dashed circular line 304 based. The first strand section 310 is from an axis of symmetry or a central axis 306 interspersed with respect to the ring-like reinforcement strand 305 radial or like a diameter. Such a transport anchor 100 can also be called a ring sleeve anchor.

4th shows the transport anchor 100 in a sectional view and in an exemplary arrangement with a schematically indicated concrete part 500 which with the transport anchor 100 to be transported and / or kept. The installation depth of the lifting anchor 100 in the concrete part 500 can also vary, at least the reinforcement is typical 300 completely covered by concrete. The connecting sleeve 200 has a first section 206 with the internal thread 202 for coupling to an external load handling device or means of transport and a second section 207 to connect to the reinforcement 300 on. Depending on the choice of the external load handler, the concrete part 500 in an axial pull direction 501 and / or in one or more diagonal pull directions 502 , 503 can be lifted or transported. In the version shown is the connecting sleeve 200 as a circular cylindrical sleeve 201 with a central axis 204 trained, the sleeve 201 in terms of the central axis 204 first axial section 206 the internal thread 202 having. The central axis 204 runs essentially parallel to the direction of axial pull 501 . The internal thread 202 can be brought into engagement with a threaded pin, not shown, of an external load-carrying or other means of transport. In terms of the central axis 204 second axial section 207 is the cross hole 203 to accommodate the first strand section 310 the reinforcement 300 intended. The two axial sections 206 , 207 are separated from each other by a sealing body or sealing plug (not shown for the sake of clarity), which prevents the concrete element from being poured out 500 with concrete mass from below to the internal thread 202 penetrates. The first strand section runs here 310 parallel to the central axis 205 the transverse bore or the transverse hole 203 . The central axis 205 of the cross hole 203 runs across or perpendicular to the central axis 204 the threaded or connecting sleeve 201 . This also runs the first strand section 310 perpendicular to the central axis 204 the threaded sleeve 201 . This means that there is also the geometric shape created by the outer border 301 (see. 3c , 5a , 5b) is spanned, in a first approximation perpendicular to the central axis 204 the threaded sleeve 201 and thus for axial preparation 501 . Thus, this geometric shape or the plane in which that geometric shape lies is parallel to the central axis 205 of the cross hole 203 and / or the top edge of the concrete 504 aligned.

The 5a-5d show different embodiments of a reinforcement 300 , with the through the second strand section 311 formed outer border or border 301 around the connecting sleeve, not shown 200 with an annular or rounded ( 5a) oval ( 5c ), square ( 5c ), rectangular or polygonal shape and / or as a concave or convex polygon ( 5d ) is designed. The embodiment according to 5a corresponds to the statements according to 2-4 . Typically, the outer borders form 301 a closed geometry. The first strand section 310 forms, but not necessarily, one or more axes of symmetry in all the embodiments shown 306 out. The geometry of the outer border 301 can be depending on the dimensions of the transported Concrete part 500 or the reinforcement arranged in it.

Reference list

100

Lifting anchor

200

Connecting sleeve

201

Sleeve body

202

inner thread

203

Cross hole, cross passage

204

Center axis of the connecting sleeve

205

Central axis of the hole

206

First sleeve section

207

Second sleeve section

300

Reinforcement

301

Edging, border, ring

302

The End

303

Central axis of the lifting anchor

304

Circular line

305

Reinforcement strand, rebar

306

Axis of symmetry, central axis

307

Center point of the reinforcement

308

pitch

310

First strand section

311

Second strand section

312

Transition area

313

First strand end

314

Second strand end

316

overall length

317

diameter

400

Junction, welded joint

401

First connection point

402

Second junction

500

Concrete part

501

Direction of axial pull

502

First diagonal direction

503

Second diagonal direction

504

Concrete top edge

QUOTES INCLUDE IN THE DESCRIPTION

This list of documents listed by the applicant has been generated automatically and is only included for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• DE 2325483 A [0004]
• DE 102017102910 A1 [0005]

Claims (10)

Transport anchor (100) for a concrete component (500), which has the following: - a connecting sleeve (200) with a transverse hole or another transverse passage (203) running transversely to the longitudinal direction of the sleeve, the connecting sleeve (200) for the stop or engagement is formed on or with an external load suspension device, and - a reinforcement strand (305) assigned to the concrete part (500), which is guided through the transverse passage (203) of the connecting sleeve (200), characterized in that the reinforcement strand (305) on the Connection sleeve (200) is fixed by means of one or more welded connections or one or more other connecting means (400). Transport anchor after Claim 1 , characterized in that the one or more connecting means (400) are placed on or in the or the openings of the transverse passage (203). Transport anchor after Claim 1 or 2nd , characterized in that the reinforcement strand (305) is bent, curved or kinked once or several times in such a way that it surrounds the connecting sleeve (200) in whole or in part or simply or repeatedly. Transport anchor according to one of the preceding claims, characterized in that the reinforcement strand (305) has a first strand section (310) guided through the transverse passage and a second strand section (311) adjoining it via a transition region (312), which section completely or partially the connecting sleeve (200) runs around. Transport anchor after Claim 4 , characterized in that one end (313) of the reinforcement strand (305) or of the first strand section (310) passing through the connecting sleeve (200) on the second strand section (311) surrounding the connecting sleeve (200) between a strand end (314) and the Transition area (312) from the first to the second strand section is fixed. Transport anchor after Claim 4 or 5 , characterized in that one end (314) of the reinforcement strand (305) or of the second strand section (311) surrounding the connecting sleeve (200) is fixed to the first strand section (310) in the transition region (312) from the first to the second strand section. Transport anchor according to one of the preceding claims, characterized in that a surface or plane spanned by the reinforcing strand (35) which runs curved, bent or kinked forms a right angle with a longitudinal axis of the connecting sleeve (200) or of the transport anchor (100). Transport anchor according to one of the preceding claims, characterized in that the reinforcement strand (305) or the second strand section (311) is guided around the connecting sleeve (200) in accordance with an imaginary, helical or screw-like line with a pitch (a) which corresponds to the diameter (317) of the reinforcement strand (305) corresponds. Transport anchor after Claim 7 and 8th , characterized in that the two strand ends (313, 314) are placed on their assigned strand regions (311, 312) axially parallel in opposite directions, in each case overlapping, fixed and fixed overlapping with these strand regions (311, 312). Method for producing a transport anchor (100) for a concrete part (500) according to one of the preceding claims, comprising the following steps: - providing a connecting sleeve (200) with a transverse hole (203) against which an external load-carrying means can be attached or engaged; - Providing and dividing a reinforcement strand (305) into a first and a second strand section (310, 311); - Bending the reinforcement strand (305) in such a way that the first strand section (310) is angled away from the second strand section (311) and has an at least largely straight course; - Bending the reinforcement strand (305) such that the second strand section (311) receives a curved, curved or kinked course; - Pushing the first strand section (310) through the transverse hole (203) of the connecting sleeve (200), characterized in that the first strand section (310) after being pushed through the sleeve transverse hole (203) at least once firmly with the connecting sleeve (200) Forming a welding or other connection point (400) is connected.

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