Concrete form arrangement having form elements connected by anchor rod and method of producing the form arrangement

Abstract

For one sided anchoring of two casing elements the invention proposes an anchor including an anchor rod with a thread and an anchor head that is rotationally fixed at the anchor rod to drive the anchor to rotate. A first reaction bearing is arranged at a fixed distance from the anchor head, wherein an enveloping tube that is arrangeable on the anchor rod is supported at the first reaction bearing, wherein a sleeve that forms a second reaction bearing for a casing element that is remote from the anchor head is arranged at another end of the enveloping tube. The invention facilitates one sided anchoring.

Claims

1. A casing arrangement, comprising: two casing elements that are arranged at a distance from each other and connected by an anchor configured to connect two casing elements that are arranged at a distance from each other and opposite to each other, the anchor including an anchor rod that includes a thread on which an enveloping tube is arrangeable so that the anchor rod is axially movable in the enveloping tube, wherein the anchor rod includes an anchor head that is rotationally and axially fixed at the anchor rod and a first reaction bearing for the enveloping tube at a fixed distance from the anchor head, wherein the two casing elements include anchor holes through which the anchor rod is inserted and wherein the enveloping tube is arranged on the anchor rod between the two casing elements, wherein the enveloping tube is supported at the first reaction bearing of the anchor rod, wherein a second reaction bearing contacts the enveloping tube, wherein a casing element that is remote from the anchor head of the anchor rod includes an inner thread into which the anchor rod is threaded, wherein the casing element that is remote from the anchor head contacts the second reaction bearing of the anchor rod, wherein seals are arranged at the anchor holes of the two casing elements, and wherein the seals seal between the two casing elements and the enveloping tube.

2. The casing arrangement anchor according to claim 1, wherein the anchor includes an attachment device configured to provide fixing at a casing element that is proximal to the anchor head.

3. The casing arrangement according to claim 1, wherein one of the seals includes a reaction bearing for the second reaction bearing of the anchor rod at the casing element that is remote from the anchor head.

4. A method for constructing the casing arrangement according to claim 1, the method comprising: inserting the anchor rod with the enveloping tube that contacts the first reaction bearing and with the second reaction bearing that contacts the end of the enveloping tube that is remote from the first reaction bearing from one side through the anchor holes of the two casing elements, and threading the anchor rod into an inner thread of the casing element that is remote from the anchor head so that the casing element that is remote from the anchor head contacts the second reaction bearing of the anchor rod and the two casing elements are supported at a distance from each other.

5. The method according to 4, wherein a seal is arranged at an anchor hole of the casing element that is remote from the anchor head when the anchor rod is inserted through the anchor hole, and wherein the seal seals between the casing element and the enveloping tube.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The invention is subsequently described in more detail with reference to an embodiment that is illustrated in the drawing FIGURE. The only drawing FIGURE illustrates a casing arrangement with an anchor according to the invention.

DETAILED DESCRIPTION OF THE INVENTION

(2) The casing arrangement according to the invention that is illustrated in the drawing FIGURE includes two casing elements 1 that are arranged parallel to one another at a distance from each other which are connected by plural anchors 2 that are distributed over their surfaces wherein only one anchor is illustrated in the drawing FIGURE. In the embodiment the casing elements 1 are frame casing elements with flat plates from wood, plastic material or metal configured as casing shells 3 which are reinforced by frames 4 that include longitudinal and transversal beams on their back sides that are oriented away from each other. The beams of the frame 4 are rectangular metal tubes in the illustrated embodiment. Surfaces of the casing shells 3 that are oriented away from the frames 4 form casing surfaces 5 of the casing shells 3 and of the casing elements 1. They are oriented towards each other in the casing arrangement. When a wall is cast with concrete the two casing elements 1 are set up standing upright and flow capable concrete is filled between the casing elements 1, wherein the casing surfaces 5 of the casing elements 1 come in contact with the concrete and form its surface.

(3) The anchor 2 according to the invention includes an anchor rod 6 with a thread. In the illustrated embodiment the anchor rod 6 is a so called Dywidag rod with a special thread whose turns are not continuous in the circumferential direction but interrupted at two opposite locations over an entire length of the rod, this means each turn of the thread is interrupted twice on opposite sides of the rod. The Dywidag rod is not required for the invention.

(4) At one end a nut is threaded onto the anchor rod 6 and compressed so that it is attached torque proof at the anchor rod 2. The nut can also be attached torque proof at the anchor rod 2 in a different manner. Through the thread the nut is also axially fixated at the anchor rod 2. The nut forms an anchor head 7 of the anchor 2 that is rotationally and axially fixated at the anchor rod 6. In the embodiment the nut is a wing nut whose wings 8 facilitate a rotating, tightening or loosening of the anchor 2 with hammer strikes. A rotation drive is also feasible by applying a non-illustrated rotation tool like for example an open end wrench or a boxed wrench or an impact driver which is applied through form locking torque proof to the nut forming the anchor head 7.

(5) The anchor head 7 includes a ball section 9 that is rotatable and pivotable like a ball joint in all directions and received in a so called spherical section plate 10 which envelops the anchor head 7 in a circular manner and which protrudes in a direction that is radial to the anchor head beyond the circular shape. There the spherical section plate 10 includes a bolt, in the embodiment an eye bolt, as an attachment device for attaching the anchor head 7 or the anchor 2 at one of the two casing elements 1. The eye bolt that forms the attachment device 11 is threaded into an inner threaded sleeve 22 in the frame 4 of the casing element 1 and fixes the spherical section plate 10 with the anchor head 7 on the back side of the frame 4 of the casing element 1 wherein the back side is oriented away from the other casing element 1 and the spherical section plate 10 is fixed at the anchor head 7.

(6) The anchor rod 6 penetrates anchor holes in the frames 4 and in the casing shells 3 of the casing elements 1 and is threaded into an inner thread 12 of the casing element 1 that is remote form the anchor head 7. For the inner thread the casing element 1 can include a sleeve with an inner thread or a nut which is welded into a carrier of the frame 4 of the casing element 1 or a nut which is engaged at the frame 4 or arranged in another disengageable or non-disengageable manner. In the embodiment the casing element 1 includes an anchor lock 13 which is arranged on a backside of the casing shell 3 at or in a carrier of the frame 4 of the casing element 1. The anchor lock 13 includes a rotatable lock element 14 that is circular in a side view and which includes a pass through hole 15 without a thread and an interior thread hole 16 with the inner thread 12 that is also continuous and intersects the pass through hole 15 in an orthogonal direction. The pass through hole 15 without the thread and the hole 16 with the inner thread can be aligned by rotating the closure element 14 by 90 optionally with the anchor hole for the anchor rod 6 of the anchor 2 in the casing shell 3 of the casing element 1.

(7) In the embodiment both casing elements 1 include an anchor lock 13 of this type wherein the closure element 14 of the anchor lock 13 of the casing element 1 that is remote from the anchor head 7 is rotated so that the hole 15 with the inner thread is aligned with the anchor hole in the casing shell 3 so that the anchor rod 6 is threadable into the inner thread 12. The lock element 14 of the anchor lock 13 of the casing element 1 proximal to the anchor head 7 at whose frame the spherical element plate 10 with the anchor head 7 is fixated is aligned so that its thread-less pass through hole 15 is aligned with the anchor hole for the anchor rod 6 in the casing shell 3 so that the anchor rod 6 is insertable without the thread being engaged.

(8) Proximal to the anchor head 7 a threaded sleeve is threaded onto the anchor rod 6 as a first axial reaction bearing 17 for an enveloping sleeve 18 and connected torque proof with the anchor rod 6 through welding, gluing, pressing or in another manner so that the first reaction bearing 17 is arranged torque proof and in particular axially fixed at a fixed axial distance from the anchor head 7 and the spherical element plate 10 of the anchor 2 on the anchor rod 6. The reaction bearing 17 protrudes a short distance on a side of the casing surface 5 from the casing shell 3. The enveloping tube 18 is arranged between the casing elements 1 and their casing shells 3 on the anchor rod 6.

(9) At an end of the enveloping tube 18 that is remote from the anchor head 7 an additional sleeve is arranged as a second axial reaction bearing 19 on the anchor rod 6. The second reaction bearing 19 is arranged in the casing arrangement according to the invention in the casing shell 3 of the casing element 1 that is remote from the anchor head 7 and is supported on one side axially at the enveloping tube 18 and supports on the other side the casing element 1 axially at the anchor rod 6 or through the enveloping tube 18 at the anchor 2. In this embodiment the second reaction bearing 19 supports the casing element 1 at the anchor lock 13 or at its locking element 14. The anchor lock 13 or its lock element 14 form a reaction bearing 20 of the casing element that is remote from the anchor head 7 through which the casing element 1 contacts the second reaction bearing 19 of the anchor 2. The second reaction bearing 19, however, can support the casing element 1 also in another manner or at another location axially at the anchor 2.

(10) The second reaction bearing 19 has an axial length so that it protrudes like the first reaction bearing 17 by a short distance on the side of the casing shell 15 from the casing shell 3 of the casing element 1 when the anchor lock 13 or the lock element 14 contact the second reaction bearing 19 or when the casing element 1 is supported at the second reaction bearing 19. A length of the enveloping tube 18 determines a distance of the two casing elements 1 or of their casing surfaces 5 from each other. Thus, the anchor 2 itself is usable for any distances of the casing elements 1 from each other if its anchor rod 6 is long enough. For a smaller distance of the casing elements 1 from each other the anchor rod 6 protrudes further on the back side of the casing element 1 that is remote from the anchor head 7, compared to a larger distance of the casing elements 1 from each other.

(11) After casting and curing the concrete the enveloping tube 18 remains in the concrete and the anchor 2 is initially threaded out of the inner thread 12 of the casing element 1 that is remote from the anchor head 7 and is subsequently pulled out of the enveloping tube 18 and the casing element 1 that is proximal to the anchor head 7. The eye bolt at the spherical element plate 10 that forms the attachment device 11 is previously disengaged from the frame of the casing element 1 that is proximal to the anchor head 7.

(12) The enveloping tube 18 is advantageously slightly shorter than the distance between the casing surfaces 5 of the casing elements 1 and the two reaction bearings 17, 19 advantageously protrude slightly from the casing shells 3, so that the enveloping tube 18 is embedded into the concrete and does not protrude from the concrete. The enveloping tube 18 can be as long as the distance of the casing surfaces 5 and the reaction bearing 17, 19 can be flush with the casing surfaces 5. In this case the enveloping tube 18 terminates flush with the surfaces of the concrete. Though not explicitly provided but also not excluded by the invention is an embodiment where the enveloping tube 18 is longer than a distance of the casing surfaces 5 of the two casing elements 1 from each other so that the enveloping tube 18 protrudes from the concrete.

(13) Grommet shaped seals 21 are arranged in the anchor holes of the casing shells 3 of the 2 casing elements 1 wherein the seals have a frustum shaped flange on the casing surfaces 5 and form frustum shaped depressions into the surface of the concrete at the location of the enveloping tube 18. The seals 21 protrude further on the sides of the encasement surfaces 5 from the casing surfaces 5 from the casing shells 3 than the reaction bearings 17, 19 so that both ends of the enveloping tube 18 protrude into the seals 21. The seals 21 seal between the casing shells 3 of the casing elements 1 and the enveloping tube 18. When removing the casing elements 1 after concrete casting the seal elements 21 remain in the anchor holes of the casing shells 3 of the casing elements 1.

(14) In order to construct the casing arrangement according to the invention, this means connect the casing elements 1 with the anchor 2 the casing elements 1 are arranged parallel to one another and at a distance from each other so that their casing surfaces 5 are oriented towards each other and their anchor holes are aligned with each other. Alignment errors can be compensated by slanting the anchor 2 or the anchor rod 6. The locking elements 14 of the anchor locks 13 are rotated so that the thread-less pass through hole 15 of the locking element 14 of the casing element 1 and the inner thread hole 16 of the locking element 14 of the anchor lock 13 of the other casing element 1 are aligned with the anchor holes in the casing shells 3 of the casing elements 1. The anchor rod 6 of the anchor 2 is inserted from a back side of the casing element 1 that is oriented away from the other casing element 1 in which casing element the thread-less pass through hole 15 of the lock element 14 of the anchor lock 13 is aligned with the pass through hole 15 in the casing shell 3 through the pass through hole 15 in the lock element 14 and the anchor hole in the casing shell 3 of casing elements 1 and through the anchor hole in the casing shell 3 of the other casing element 1 and threaded into the inner threaded hole 16 of the lock element 14 of the anchor lock 13 of the other casing element 1 that is remote from the anchor head 7 and tightened by driving the anchor head 7 to rotate.

(15) Thus, the anchor 2 clamps the two casing elements 1 together which are kept at a distance from each other by the enveloping tube 18 that is supported at the first reaction bearing 17 of the anchor 2 and at which the second reaction bearing 19 of the anchor 2 is supported. Furthermore the spherical element plate 10 which supports the anchor head 7 so that it is rotatable and pivotable in all directions is fixed by the eye bolt forming the attachment device 11 at a back side of the frame 4 of the casing element 1 which back side is oriented away from the casing shell 3. When the anchor rod 6 is inserted the seals 21 are arranged in the anchor holes of the casing shells 3 and the enveloping tube 18 and the second reaction bearing 19 are placed onto the anchor rod 6. As illustrated the second reaction bearing 19 can include an inner thread and is threaded against the enveloping tube 18 in this case before the anchor rod 6 is inserted through the casing elements 1 so that the enveloping tube 18 contacts the first reaction bearing 17. The second reaction bearing 19 can also be provided without a thread and thus axially movable on the anchor rod 6. The second reaction bearing 19 then attaches at the enveloping tube 18 when the anchor rod is inserted through the seals 21 and the enveloping tube 18 contacts the reaction bearing 17. Connecting the two casing elements which is also designated as anchoring the casing elements 1 is performed from a back side of the two casing elements 1. The other casing elements 1 does not have to be accessible. The invention facilitates a so called one sided anchoring from one side without the other side of the two casing elements being accessible.