GB2468145A - Clamp for joining the circumferential band of adjacent cage sections - Google Patents

Clamp for joining the circumferential band of adjacent cage sections Download PDF

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Publication number
GB2468145A
GB2468145A GB0903345A GB0903345A GB2468145A GB 2468145 A GB2468145 A GB 2468145A GB 0903345 A GB0903345 A GB 0903345A GB 0903345 A GB0903345 A GB 0903345A GB 2468145 A GB2468145 A GB 2468145A
Authority
GB
United Kingdom
Prior art keywords
clamp
rod
retaining means
threaded
claws
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB0903345A
Other versions
GB0903345D0 (en
Inventor
Finbarr Cornelius Lynch
Richard Ashley Evershed
Alexander James Sutton
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KIERBECK Ltd
Original Assignee
KIERBECK Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by KIERBECK Ltd filed Critical KIERBECK Ltd
Priority to GB0903345A priority Critical patent/GB2468145A/en
Publication of GB0903345D0 publication Critical patent/GB0903345D0/en
Publication of GB2468145A publication Critical patent/GB2468145A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B2/00—Friction-grip releasable fastenings
    • F16B2/02—Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening
    • F16B2/06—Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening external, i.e. with contracting action
    • F16B2/065—Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening external, i.e. with contracting action using screw-thread elements
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
    • E04C5/162—Connectors or means for connecting parts for reinforcements
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
    • E04C5/162—Connectors or means for connecting parts for reinforcements
    • E04C5/163—Connectors or means for connecting parts for reinforcements the reinforcements running in one single direction
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
    • E04C5/18—Spacers of metal or substantially of metal
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
    • E04C5/20—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups of material other than metal or with only additional metal parts, e.g. concrete or plastics spacers with metal binding wires
    • E04C5/208—Spacers especially adapted for cylindrical reinforcing cages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B2/00—Friction-grip releasable fastenings
    • F16B2/02—Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening

Abstract

The clamp, particularly for use in connecting prefabricated reinforcement cages used in concrete piles, comprises interconnecting claws located about a rod and one or more retaining devices to adjusting the clamp. The rod may be threaded and a retaining device may be a tie-rod hexagonal nut. One of the retaining devices inay be fixed, preferably with a puddle weld. One of the retaining devices may be prevented from moving the full length of the rod, preferably by a spot weld. The claws may be Lindapter CF (TM) fixings. The orientation of the clamp may be indicated by painting or marking the upper portion. Also disclosed is a method of joining circumferential bands of adjacent cage sections with a clamp.

Description

Title: Clamp The invention relates to a clamping system for longitudinally connecting prefabricated reinforcement cages of the type commonly used to strengthen concrete piles.
Pile cages can be designed to be virtually any length, but are not normally longer than approximately 50 metres. Due to the practicalities of manufacture, handling and transportation, it is usually necessary to make the cages in sections not normally longer than a trailer length of approximately 12 metres.
Current practice is to splice the longitudinal reinforcement bars from one cage section to the next, using multiple bulldog clamps'. Whereas this is a technically effective method, it is time consuming and, significantly, requires the operative(s) to spend long periods of time with their hands inside' the pile cage whilst it is trapped-off above ground for the multiple clamp connections to be made (before then lowering that section of cage into the ground).
This constitutes a significant risk to the operative(s), as the potential exists for the upper cage to slip or move during the fitting of the bulldog clamps trapping, cutting or even severing the operative's hands.
Furthermore because multiple clamp connections are made to the longitudinal reinforcing rods as each bulldog clamp' is placed in position it becomes more difficult for subsequent connections to be made, causing application of the final bulldog clamp' to be especially difficult.
Circumferential steel bands are routinely welded to the longitudinal reinforcement rods where cage intersections occur to act as potential lifting points for crane hooks and to reduce the risk of bursting when the cages are filled with concrete.
Instead of connecting the longitudinal reinforcement rods to one another as in the prior art, in the present invention clamps join the circumferential steel bands of adjacent cage sections together.
The present invention provides a quick, easy to use, strong, inexpensive and safe product and method for joining one or more cage section together at the circumferential steel bands.
In a first aspect the invention relates to a clamp for joining the circumferential bands of adjacent cage sections together: comprising a pair of interconnecting claws located about a rod and one or more retaining means for tightening and loosening the clamp.
In another aspect the invention relates to a clamp wherein the rod is threaded and at least one of the retaining means is threaded and wherein the one or more threaded retaining means is located about the threaded rod and wherein the claws are separated and the clamp loosened by rotating the one or more threaded retaining means in a first direction about the threaded rod and the clamp is tightened by rotating the one or more threaded retaining means in the opposite direction about the threaded rod.
In another aspect the invention relates to a clamp wherein the retaining means is a nut preferably a tie-rod hexagonal nut.
In another aspect the invention relates to a clamp wherein one of the retaining means is fixed preferably with a puddle weld.
In another aspect the invention relates to a clamp wherein one of the retaining means is prevented from moving along the full length of the threaded rod preferably by a spot weld.
In another aspect the invention relates to a clamp wherein the claws are Lindapter� CF fixings.
I
A-
In another aspect the invention relates to a clamp wherein the installation orientation is indicated by painting or otherwise marking the upper portion of the clamp to enable it to be visibly distinguished from the lower portion.
In another aspect the invention relates to a method ofjoining the circumferential bands of adjacent cage sections together using a clamping means.
Description of the drawings:
Figure 1: is a schematic representation of four clamps of the present invention clamping together a pair of adjacent circumferential bands.
Figure 2: is a more detailed schematic representation of one of the clamps shown in figure 1 viewed from outside 2A and inside 2B the cage.
Figure 3: shows a side elevation of a clamp of the present invention in position joining together two adjacent sections of cage at their circumferential bands.
Figure 4: shows a plan view of three clamps of the present invention in position joining together two adjacent sections of cage at their circumferential bands.
Figure 5: shows the side elevations and plan views of a prefeffed clamp of the present invention.
Figure 6: shows the side elevation and the plan view of the prefeffed clamp shown in figure 5 in position joining together two adjacent sections of cage at their circumferential bands.
Figure 7: shows the side elevation and the plan view of the prefeffed clamp shown in figure 5 in position joining together two adjacent sections of cage at their circumferential bands.
Figure 8: shows the side elevation and the plan view of the prefeffed clamp shown in figure 5 in position joining together two adjacent sections of cage at their circumferential bands.
As shown in figure 1 the invention relates to a clamp 1 for securing one or more section of cage together. As shown in figure 1 multiple clamps are positioned around the circumferential bands 2a, and 2b which are conventionally routinely welded to the longitudinal reinforcement rods 3 where cage intersections occur to act as potential lifting points for crane hooks and to reduce the risk of bursting when the cages are filled with concrete.
Preferably three or more clamps are used to join each pair of circumferential bands 2a and 2b together, to ensure that each cage section is securely, linked to the adjacent sections. The present invention produces strong, secure, connections which enable multiple cage sections to be reliably, safely joined together. Although it is most usual for only 2 to 3 cage sections to be joined together longitudinally the present invention enables a limitless number of cage sections to be joined together to obtain a single cage of any desired size and shape.
In use adjacent cage sections are positioned, such that the steel bands of each cage section abut one another, and an appropriate number (normally a minimum of three) of clamps are used to connect each pair of bands together.
At designated fixing points around the circumference, the bands are marked for example with spray paint or similar to ensure even separation of the clamps around the circumferential bands.
In a preferred aspect in use the clamp is rested' on the upper band (where indicated by paint markings), such that the band slots between the arms of the upper claw 8 as shown in figure 5. The lower clamp is then adjusted into location onto the lower band, and hand-tightened into position using the threaded retaining means 7 which preferably comprises a hexagonal nut, which is then tightened with a spanner to between one half and one complete rotation, or alternatively may also be tightened to a prescribed torque setting.
The clamp of the present invention can be fixed either to the outside of the circumferential bands and therefore the cage as shown in figures 1-4, 7 and 8, or to the inside the circumferential bands and therefore the cage, as shown in figure 6 according to site preference.
It should be noted, however, that fixing the clamp to the outside of the cage as shown in figures 1-4, 7 and 8 is most preferred. As if the clamp is fitted to the inside of the cage this constitutes a safety risk to operatives' hands.
As shown in figure 5 the clamp preferably comprises a threaded rod 5 and a pair of interlocking claws 8 and 9. The claws each have a bore 10 which allows the threaded rod to pass through the claws. In a prefeffed embodiment the bore 10 is sized and shaped to allow the claws to move along the threaded rod 5 freely.
Preferably this threaded rod is tie-rod, which (in 15mm diameter version) is normally used for tying formwork systems/shuftering together (for concrete containment whilst liquid and until sufficiently cured). There arc a number of different manufacturers of this coarse-threaded product.
The claws arc held in place by retaining means 6 and 7 which preferably comprise tie-rod hexagonal nuts, which are cast steel and compatible with the tie-rod coarse thread.
In a prefeffed embodiment the upper retaining means 6 is fixed to the tie-rod by way of a puddle weld'. This ensures that the nut will not rotate in use, which makes for easier placement on the upper band and subsequent tightening.
Preferably the upper claw 8 is restrained into position by way of a weld placed onto the tie-rod itself This enables the clamp to free-rotate underneath the top hexagonal nut, again assisting placement onto the upper band.
In a preferred embodiment the claws comprise a pair of Lindapter� CF fiftingss or the like, most preferably the Lindapter� CF 16 fitting, although other sizes can also be utilized. As shown in figure 3 and SB preferably the clamp is arranged so that two arms 12 and 13 of the claw are located on the outside of the circumferential bands 2a and 2b.
In a preferred embodiment the lower retaining means 7 is allowed to freely-rotate, but is prevented from being totally unscrewed/separated from the tie-rod by way of a weld placed at the lower end of the tie-rod itself The lower Lindapter CF clamp is allowed to free-rotate above the lower hexagonal nut.
Preferably all the components of the clamp are made from steel or like material.
Most preferably the clamp of the present invention is a single fixing comprising: a length of tie-rod or the like, of variable length, but most preferably in the range 400mm-S 00mm; a pair of Lindapter� CF fittings or the like, most preferably the Lindapter� CF 16 fitting, although other sizes can also be utilized; and one or more retaining means formed by tie-rod hexagonal nuts (preferably of 105mm length, but other lengths can also be utilized).
The claws are located about the tie-rod so that the clamp's claws can be tightened by rotating one or both retaining means about the tie-rod to grip the circumferential bands of adjacent cage sections.
Although the clamps of the present invention will fijnction equally well regardless of which end is uppermost when the clamp is installed, as installation will generally be easier if the fixed portion is placed uppermost preferably this portion of the clamp is painted or otherwise marked to be visibly distinguishable from the lower portion. So that the operative is able to easily identifiy the correct orientation of the clamp. To further aid correct orientation it is more preferable for the upper circumferential band to be marked with the same colour as the upper portion as the clamp and for the lower circumferential band and the lower portion of the clamp to be marked with another colour.

Claims (10)

  1. Claims: 1. A clamp for joining the circumferential bands of adjacent cage sections together: comprising a pair of interconnecting claws located about a rod and one or more retaining means for tightening and loosening the clamp.
  2. 2. A clamp as claimed in claim 1 wherein the rod is threaded and at least one of the retaining means is threaded and wherein the one or more threaded retaining means is located about the threaded rod and wherein the claws are separated and the clamp loosened by rotating the one or more threaded retaining means in a first direction about the threaded rod and the clamp is tightened by rotating the one or more threaded retaining means in the opposite direction about the threaded rod.
  3. 3. A clamp as claimed in claim 1 or claim 2 wherein the retaining means is a nut preferably a tie-rod hexagonal nut.
  4. 4. A clamp as claimed in any preceding claim wherein one of the retaining means is fixed preferably with a puddle weld.
  5. 5. A clamp as claimed in any one of claims 2 to 4 wherein one of the retaining means is prevented from moving along the full length of the threaded rod preferably by a spot weld.
  6. 6. A clamp as claimed in any preceding claim wherein the claws are Lindapter� CF fixings.
  7. 7. A clamp as claimed in any preceding claim wherein the installation orientation is indicated by painting or otherwise marking the upper portion of the clamp to enable it to be visibly distinguished from the lower portion.
  8. 8. A method ofjoining the circumferential bands of adjacent cage sections together using a clamping means.
  9. 9. A clamp as described herein or as shown in any one of figures 1 to 8.
  10. 10. A method ofjoining the circumferential bands of adjacent cage sections together as described herein or as shown in any one of figures 1,2,3,4,6,7 and 8.
GB0903345A 2009-02-27 2009-02-27 Clamp for joining the circumferential band of adjacent cage sections Withdrawn GB2468145A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0903345A GB2468145A (en) 2009-02-27 2009-02-27 Clamp for joining the circumferential band of adjacent cage sections

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0903345A GB2468145A (en) 2009-02-27 2009-02-27 Clamp for joining the circumferential band of adjacent cage sections

Publications (2)

Publication Number Publication Date
GB0903345D0 GB0903345D0 (en) 2009-04-08
GB2468145A true GB2468145A (en) 2010-09-01

Family

ID=40565818

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0903345A Withdrawn GB2468145A (en) 2009-02-27 2009-02-27 Clamp for joining the circumferential band of adjacent cage sections

Country Status (1)

Country Link
GB (1) GB2468145A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017212209A1 (en) * 2016-06-07 2017-12-14 Arcelormittal Kent Wire Limited Improvements in and relating to piling cages
CN108412131A (en) * 2018-05-15 2018-08-17 孟凡林 The connecting node of the vertical distribution bar of assembled circular hole slab shear wall and connection method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB461953A (en) * 1942-09-09 1937-02-26 Henry Lindsay Method of and means for clamping girders and the like together
GB2093519A (en) * 1981-01-15 1982-09-02 Anthes Equip Ltd Clamp
WO2006067459A1 (en) * 2004-12-23 2006-06-29 Tyco European Metal Framing Limited Clamp head

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB461953A (en) * 1942-09-09 1937-02-26 Henry Lindsay Method of and means for clamping girders and the like together
GB2093519A (en) * 1981-01-15 1982-09-02 Anthes Equip Ltd Clamp
WO2006067459A1 (en) * 2004-12-23 2006-06-29 Tyco European Metal Framing Limited Clamp head

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017212209A1 (en) * 2016-06-07 2017-12-14 Arcelormittal Kent Wire Limited Improvements in and relating to piling cages
GB2565485A (en) * 2016-06-07 2019-02-13 Arcelormittal Kent Wire Ltd Improvements in and relating to piling cages
GB2565485B (en) * 2016-06-07 2021-03-24 Arcelormittal Kent Wire Ltd Improvements in and relating to piling cages
CN108412131A (en) * 2018-05-15 2018-08-17 孟凡林 The connecting node of the vertical distribution bar of assembled circular hole slab shear wall and connection method
CN108412131B (en) * 2018-05-15 2020-05-01 孟凡林 Connecting node and connecting method for vertically distributed reinforcing steel bars of assembled circular hole plate shear wall

Also Published As

Publication number Publication date
GB0903345D0 (en) 2009-04-08

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Legal Events

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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)