Locking device having stop for anchor rod and process

Abstract

The Invention relates to a locking device for an anchor rod of a wall formwork. Moreover the invention relates to an anchoring system having an anchor rod and a locking device; as well a process for mounting a wall formwork. The locking device for an anchor rod of a wall formwork comprises a thread for the insertion of one end of the anchor rod and a stop which is removable from its stop position for an anchor rod end which is screwed into the thread.

Claims

1. An anchoring system for a concrete wall formwork, the anchoring system comprising: an anchor rod; a first locking device comprising: a cap plate with an anchor-rod bore hole formed through the cap plate; a bushing movably mounted to the cap plate and comprising a bore with an axis that passes through the anchor-rod bore hole; a stop mounted on the bushing and comprising a bore passing through the stop; wherein a user may connect an end of the anchor rod to the first locking device in a first position or a second position without looking at the first locking device during connection of the anchor rod to the first locking device; wherein, when the anchor rod is in the first position, the stop is in a first orientation where the bore of the stop is not parallel to the axis of the bore of the bushing so that a tip of the anchor rod is inhibited from passing through the stop; and wherein, when the anchor rod is in the second position, the stop is in a second orientation where the bore of the stop is parallel to the axis of the bore of the bushing so that the tip of the anchor rod can extend past the first position; a second locking device; and wherein a first end of the anchor rod may be secured to the first locking device and a second end of the anchor rod may be secured to the second locking device.

2. The anchoring system according to claim 1, wherein the anchor rod comprises a non-threaded central area that tapers across a length of the non-thread central area.

3. The anchoring system according to claim 1, wherein the anchoring system is dimensioned for forming concrete walls of between 15 cm and 40 cm in thickness.

4. A locking device for an anchor rod of a wall formwork comprising: a cap plate with an anchor-rod bore hole formed through the cap plate; a bushing movably mounted to the cap plate and comprising a bore with an axis that passes through the anchor-rod bore hole; a stop mounted on the bushing and comprising a bore passing through the stop; wherein a user may connect an end of the anchor rod to the locking device in a first position or a second position without looking at the locking device during connection of the anchor rod to the locking device; wherein, when the anchor rod is in the first position, the stop is in a first orientation where the bore of the stop is not parallel to the axis of the bore of the bushing so that a tip of the anchor rod is inhibited from passing through the stop; and wherein, when the anchor rod is in the second position, the stop is in a second orientation where the bore of the stop is parallel to the axis of the bore of the bushing so that the tip of the anchor rod can extend past the first position.

5. The locking device according to claim 4, wherein removal of the stop from the bushing is prevented by a locking ring as well as a spring radially protruding from the stop.

6. The locking device according to claim 4, wherein the stop comprises an elongated handle that extends parallel to the bore of the stop.

7. The locking device according to claim 4, further comprising a mounting device for mounting the locking device to a wall formwork.

8. The locking device according to claim 4, wherein the bore of the bushing comprises a thread adapted for receiving the end of the anchor rod.

9. The locking device according to claim 8, wherein the bushing comprises a flange that extends radially from the bushing to overlap a portion of the cap plate to allow the bushing to articulate relative to the cap plate while at the same time securing the bushing to the cap plate.

10. The locking device according to claim 7, further comprising: a bolt extending from a bottom side of the cap plate and adapted to be located in a first hole formed into a formwork; and wherein the mounting device comprises a screw adapted to engage a second hole formed into the formwork; and wherein the bolt and the screw secure the locking device from rotation when the anchor rod is threaded into the bore of the bushing.

11. The locking device of claim 4, wherein the second orientation of the stop allows for maximal insertion of the anchor rod into the locking device.

12. The locking device of claim 4, wherein, in the first orientation, the bore of the stop is perpendicular to the axis of the bore of the bushing.

13. The locking device of claim 4, wherein the stop is mounted rotatably on the bushing to permit the bore passing through the stop to be rotated into and out of alignment with the bore of the bushing.

14. A method for mounting an anchoring system according to claim 1 to a wall formwork, the method comprising: passing the anchor rod through an anchor-rod bore hole of the second locking device; passing the anchor rod through an opening of a first wall formwork and through an opening of a second wall formwork, wherein the first and second wall formworks comprise front sides that face one another and are 15 cm to 40 cm apart; directing the anchor rod into the anchor-rod bore hole of the first locking device; wherein, when the stop is in the first position, the anchor rod is directed into the anchor-rod bore hole of the first locking device until the tip of the anchor rod contacts the stop; and wherein, when the stop is in the second position, the anchor rod is directed into the anchor-rod bore hole of the first locking device so that the tip of the anchor rod passes into the bore of the stop.

Description

(1) In the following an advantageous embodiment of the invention will be explained in more detail by way of figures.

(2) In FIG. 1 a sectional view of a locking device is shown which comprises a cap plate 1 and a bushing 2 which is movably connected to the cap plate 1. The bushing 2 is provided with an internal thread 3 into which the external thread of an anchor rod end shown in FIG. 2 is inserted. This anchor rod end is provided with a tip 5, in order to be able to easily thread the end into the internal thread 3 of the locking device. At one end the bushing 2 is provided with an outer circumferential groove 6 which is provided by flanges 7 and 8 which radially protrude from the bushing 2. The flanges 7 and 8 show an arcuate section such that the bushing 2 may be displaced like a joy stick in relation to the cap plate 1. A rim area 9 of the opening of the cap plate 1 protrudes into this groove 6, having an allowance such that the bushing 2 remains free in relation to the cap plate 1. Especially for this reason the rim area 9 is spaced apart from the outer circumference of the bushing 2.

(3) A screw 10 passes through the cap plate 1 and is introduced through the bushing 11 which is mounted opposite to the bottom side of the cap plate 1, the end of the screw 10 which is provided with the thread may be screwed into a wall formwork in order to be able to mount the cap plate 1 to this wall formwork. The bottom side of the cap plate 1 comprises a bolt 12 protruding from the bottom side which protrudes into an opening of the designated wall formwork in order to be able to mount the cap plate to the back side of a wall formwork in a torque-proof manner. The bottom side of the cap plate then is adjacent to the back side of a wall formwork such that the thread 3 is aligned with an opening which passes through the wall formwork. The screw 10 is rotatably supported by the bushing 11, but is preferably secured against falling out of the bushing 11 such as for example by a circumferential groove 13, into which for example a spring protrudes which is connected to the bushing 11.

(4) The screw 10 is provided with an oval handle 14, in order to be able to manually mount the screw 10 to a wall formwork. The oval handle 14 extends transversally to the longitudinal extension of the screw 10.

(5) The bushing 2 having the internal thread 3 is passed by a cylindrical stop 15 at the end adjacent to the cap plate 1. The stop 15 extends transversally to the longitudinal extension of the bushing 2, i.e. passing a transversal bore hole of the bushing 2 which functions as a support for the stop 15. The stop 15 may be twisted but may not be pulled out of the bushing 2. This will be prevented by the radially protruding spring 16 at one end and will be prevented at the other end by a locking ring 17. The stop 15 comprises a transversal bore hole 18 which is dimensioned and may be aligned by way of rotating the stop 6 such that an end which is screwed into the thread 3 of the bushing 2 of an anchor rod may pass through the hole 18. The hole 18 then is aligned with the thread 3. In this aligned position the stop 15 has been removed from its stop position.

(6) In FIG. 1 there is show a stop position of the stop 15. If one end of an anchor rod is screwed into the thread 3 of the bushing 2 the tip 5 of the anchor rod end finally will contact the stop 6, such that the anchor rod may not be screwed any further into the thread 3. In order to allow further insertion the stop 15 shown in FIG. 1 first must be twisted by 90.

(7) In order to be able to smoothly twist the stop 15 it has a handle 19. The handle 19 is similar to the handle 14. However, in comparison to handle 14 the handle 19 is shown twisted by 90. Shown in top view the oval handle 19 thus has a longitudinal extension which corresponds to the extension of the transversal bore hole 18 thus signalizing the extension of this transversal bore hole 18.

(8) From the bushing 2 a yoke which is attached thereto protrudes towards guiding bushing 11 and encloses the latter with its two ends on two sides thus being able to prevent undesired twisting of the thread 3. The yoke 27 together with the guiding bushing 11 thus forms the torsion protection for the thread 3.

(9) The anchor rod shown in FIG. 2 has a central area 20 having a smooth surface, the central area tapering towards the tip 5. The other end of the anchor rod in turn is provided with a thread 21.

(10) In FIG. 3 a sectional view of two adjacent wall formworks 22 and 23 is exemplified, which are erected for the manufacture of a concrete wall. At the back side of the wall formwork 23 a locking device as shown in FIG. 1 is mounted by way of screw 10 and bolt 12 in a torque-proof manner. The anchor rod has been passed through the openings 24 and 25 of the two wall formworks 22 and 23 starting from the back side of the wall formwork 22 and subsequently has been screwed into the thread 3 of the bushing 2 until the tip 5 of the anchor rod is in contact with the stop 15, as it is depicted. The thread 4 of the anchor rod now is located exterior of the area between the two wall formworks 22 and 23 which is filled with concrete. Also the other end having the thread 21 is located exterior of the area to be cast with concrete. Between the two front sides of the two wall formworks 22 and 23 there is a distance 26.

(11) Another locking device which is not shown finally is screwed onto the thread 21 of the anchor rod until it is adjacent to the back side of the wall formwork 22 in order to absorb forces. Advantageously this other locking device is also connected to the back side of the wall formwork 22, for example by way of a screw in order to absorb both tensile and compression forces.

(12) The maximal width of a wall to be produced will not be accomplished unless the two ends of the central area 20 will be adjacent to the front sides of both wall formworks 22 and 23, such that both threads 3 and 21 of the anchor rod do not protrude into the area between the two wall formworks. The minimal width of a wall to be produced will not be accomplished unless the two locking devices have been screwed onto both thread ends 4 and 2, the stop 15 then being removed from its stop position. The locking device furthermore is designed such that a user may tightly connect the end having tip 5 of the anchor rod to the locking device provided with the stop 15 at two defined positions without the need of looking at the locking device at the time of connecting.