Joints and connections – Interfitted members – Clamped members
Patent
1991-05-13
1993-11-30
Reese, Randolph A.
Joints and connections
Interfitted members
Clamped members
403387, 403398, 403399, E04G 1704
Patent
active
052659739
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a device for connecting accessory parts to formwork panels, compensating members and suchlike formwork members having stiffening webs or stiffening profiles on their side averted from the forming surface. The device has an essentially U-shaped cross section, the U-arms having fastening locations for the accessory parts such as booms or the like. In the position of use, the U-crosspiece butts against a stiffening profile of the formwork.
Formwork for circular constructions is known from German Patent Specification No. 33 33 619, in which a chain of ties adjustable in their length is provided on the girders shoring the forming surface. These ties engage the girders of the formwork panels by way of connecting pieces and have an approximately U-shaped cross section. These connecting pieces have the fastening locations for the individual ties in their U-arms averted from the formwork.
The connecting pieces require further coupling members for engaging the stiffening girders or stiffening profiles, these coupling members for their part being approximately U-shaped and embracing the stiffening girders. It is not possible for any accessory parts such as stays directed towards the base, brackets or the like, to be fastened with these connecting pieces because they remain firmly connected to the individual ties.
SUMMARY OF THE INVENTION
The object underlying the invention is to create a device of the kind mentioned at the outset, with which any accessory parts such as booms, brackets, stays and the like can be fastened to formwork panels quickly, simply and without any difficulty. It is to be possible for the stiffening webs or stiffening profiles to be oriented vertically or horizontally.
This seemingly contradictory object is accomplished in a device of the kind mentioned at the outset in that each of the U-arms has an extension passing over part of its length and beyond the U-crosspiece on that side of the U-arms which faces the forming surface in the position of use. The extensions are provided as protection against torsion and are adapted to be placed against the longitudinal side faces of the stiffening profile and against the edges or bend at the transition from a rearward web to the longitudinal side faces of the stiffening profile. The U-crosspiece of the device has at least one point of engagement, recess or hole for a shank of a fastening member to engage or pass through. The fastening member has a head or the like projecting radially beyond the shank at least to one side and is adapted to be inserted into the stiffening profile from the side averted from the forming surface, through an opening in the stiffening profile. The fastening member is adapted to be anchored or clamped to the stiffening profile with its head and has at the end averted from its head or suchlike anchorage a counter-stop for anchorage to the U-shaped device. The two extensions, which have lengths smaller than the overall lengths of the U-arms, form shoulders with the U-crosspiece and are situated beyond the neighboring region of the holes. In a seemingly inconsistent manner parts of the U-arms of the device of U-shaped cross section project beyond the U-crosspiece, but thereby permit torsion-proof coupling onto the stiffening profile with the aid of the fastening member. Therefore any parts can in turn be fastened to this device without any difficulty and without any additional measures for protection against torsion. Due to the two extensions of the U-arms, the protection against torsion is particularly effective and allows large forces and moments to be conducted into the stiffening girders.
Since the extensions run over only part of the length of the U-arms and form shoulders, the device can be fixed to the stiffening profiles also when it is turned through 90.degree., i.e., with U-arms running approximately at right angles to the longitudinal expanse of the stiffening profiles. Therefore these stiffening profiles can run both horizontally and vertically and the device acco
REFERENCES:
patent: 3004636 (1961-10-01), Shane
patent: 3330583 (1967-07-01), Kennedy
patent: 4430019 (1984-02-01), D'Alessio
patent: 4439052 (1984-03-01), Wallther
patent: 4786204 (1988-11-01), Mayeda
Knight Anthony
Maier Josef
Reese Randolph A.
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