WO1996030607A1 - Attache distribuee manuellement ou mecaniquement pour fixer des barres d'armature - Google Patents

Attache distribuee manuellement ou mecaniquement pour fixer des barres d'armature Download PDF

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Publication number
WO1996030607A1
WO1996030607A1 PCT/US1996/004094 US9604094W WO9630607A1 WO 1996030607 A1 WO1996030607 A1 WO 1996030607A1 US 9604094 W US9604094 W US 9604094W WO 9630607 A1 WO9630607 A1 WO 9630607A1
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WO
WIPO (PCT)
Prior art keywords
rebar
clip
portions
toe
pair
Prior art date
Application number
PCT/US1996/004094
Other languages
English (en)
Inventor
Brian C. Giles
Original Assignee
Giles Brian C
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 Giles Brian C filed Critical Giles Brian C
Priority to AU54312/96A priority Critical patent/AU5431296A/en
Priority to JP8529581A priority patent/JPH11502578A/ja
Publication of WO1996030607A1 publication Critical patent/WO1996030607A1/fr

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Classifications

    • 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
    • E04C5/166—Connectors or means for connecting parts for reinforcements the reinforcements running in different directions
    • E04C5/167—Connection by means of clips or other resilient elements
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/12—Mounting of reinforcing inserts; Prestressing
    • E04G21/122—Machines for joining reinforcing bars

Definitions

  • This invention relates generally to construction methods and materials, and more specifically to an improved, leave-in-place cast-in-place attachment system used for securing together the crossing and engaging reinforcing rods or steel bars (rebar ⁇ ) , or fiberglass reinforcing rods, or cable reinforcements used in reinforced concrete constructions.
  • rebar ⁇ steel bars
  • fiberglass reinforcing rods or cable reinforcements used in reinforced concrete constructions.
  • This invention relates specifically to fastener applying tools, and especially to portable tools designed for manual or automated applications and used to attach a unique clip to engage and affix together intersecting rebar members.
  • the fastener or clip applying tool can be made portable by providing self contained power, such as cartridges or hand squeezing. None of the previously available attachment systems for the attachment of rebar are capable of high speed operation. Explosive pellets or shells (internal combustion) may be used to power the clipping tool, but these are not essential.
  • the reliable fastener tool is a relatively light weight simple and small machine, and is a cost effective and economical tool.
  • the clip fastener applying tool is a portable ergonomic fastener applying tool. It drives the attachment clips on the rebar junctions at a rapid cycling rate.
  • this clip fastener applying tool shall be identified as the “clipping gun” or simply the “gun”.
  • the clips applied by the clipping gun are high speed, machine feedable, light weight leave-in-place cast- in-place rebar attachment clips with spring actuated locking, and all of these features, and the clips' physical characteristics, and its modes of action and application will be subsequently described, and throughout these descriptions the clip shall be referred to as the "machine feedable clip”, “machine feedable rebar clip”, “rebar clip”, or simply the “clip” if such reference is suitably constrained by the context to be unambiguous.
  • Steel rebar and fiberglass or cable reinforced concrete constructions such as footings, foundation walls, pilings, slabs, etc. utilize a grid or framework of reinforcing rods, commonly referred to as rebar.
  • the rebar is preferably secured together where the respective bars cross one another.
  • the prior art has included manually wrapping a soft tie wire around the intersecting rebars. There is a great need to improve previous tools and methodologies for rebar rod attachment systems that will not rotate or shift or dislodge upon the pouring of concrete, or when additional rebar is placed upon them, which might result in the foundation wall or slab, etc.
  • the function of the rebar rods is to add to greater tensile strength than that of the concrete material has by itself.
  • the combination creates the strength (combination of rebar and concrete) .
  • Improper or inaccurate positioning of the rebar rods degrades the structural integrity of the foundation or other reinforced concrete structure, and in some cases improper positioning of the rebar can actually lead to structural failure or rejection by an examining engineer. If any rebar touches, or even comes close to the molds or forms, the inherent strength is greatly reduced, and may even be rejected by a building inspector or may require substantial reworking.
  • the machine feedable clip is a cast-in-place clip, which becomes integral with the final framework, and thus with the final reinforced concrete structure.
  • the resilient high strength of the machine feedable clip will prevent and eliminate any kind of excessive distortion, thus preventing the rebar from shifting from the proper crossed and engaged position, further guaranteeing meeting the structural specifications of the final reinforced concrete structure, particularly when high strengths and/or high degree of accuracy of structural conformation is required. This guarantees the ideal structural requirements as per engineering requirements.
  • curvilinear rebar framework structures require many surface orientations other than vertical, and present many situations in which rebar must be secured overhead, such in vaults, arches, ceilings, domes, etc.
  • the invention consists of a light weight portable reinforcement rod attachment clip and an associated attachment gun provided with a housing and a main body.
  • a magazine portion has a flat bottom surface which is adapted to fit into the gun barrel mechanism.
  • the clips magazine is located in the magazine portion to present clips one-by-one to the main driving chamber.
  • the prefabricated non-deforming clips are pushed forward by the plunger, which operates in such a manner as to push the clips, one at a time (so as to prevent jamming) up and out of the magazine, which is located, preferably, on the bottom of the gun barrel.
  • Other locations, such as the top of the gun barrel are also acceptable and workable.
  • the present invention provides a unique previously unavailable, light weight, high strength, durable spring steel wire, leave-in-place, cast-in-place high speed rebar clip and associated mechanical attachment system with improved operational differences, which is formed and dimensioned for the easy, ultra rapid, and accurate attachment to and square supporting of the crossing and engaged rebar members for the purpose of effecting the firm, spring actuated return locking attachment of these members faster, more accurately, more securely, more cost- effectively, and with greater versatility than is possible with manual hand tying or with any rebar attachment method currently known by the inventor within the present art.
  • the machine feedable clipping system of this invention is designed with a high tensile range, i.e. elastic limit spring memory with preferably 200,000 psi tensile range, so that it can be effectively installed in a variety of ways:
  • the easily fitted clips are machine placeable and feedable and are suitable for use in manually powered guns, electrically powered actuated guns, hydraulically powered guns, pneumatically powered guns, and by guns powered by exploding cartridge propellant, such as gas cartridges using propane or butane, or explosive pellets or shells or cartridges, etc;
  • the high speed clipping system will produce a firm and positive locking action of the crossing rebar members, which spring actuated return lock will have great holding ability, thus enabling workers, if necessary, to climb on the rebar framework as it is being constructed, or is in the process of assembly, while supporting their weight on the horizontal rebars in 90° rebar rod frameworks.
  • the machine feedable clip is sufficient to the intended purpose without requiring any additional accompanying stakes or other installation devices.
  • the machine feedable clip can join and affix rebar members crossing at angles slightly larger and smaller than a 90° angle and manufactured to meet various conformations.
  • Other advantages of the non-deforming machine feedable clip are that it will work with virtually all known rebar surface deformations, and will also work with fiberglass rebar rod members, and with reinforcement cable.
  • the clip will also reliably attach raised or indented striations or rulings on the surface of the rebar members referred to as deformations, which may be particularly desirable with the use of fiberglass rebar.
  • the machine feedable clip may be manufactured with surface deformations and/or may be coated with some anti-corrosion material such as epoxy, plastic, paint,
  • Teflon, etc. which can add the feature of color coding to the clips, aiding their identification and use in varying applications.
  • the machine feedable clipping system accurately secures, supports, and affixes the rebar rod members in place in the normal course of its attachment, and, unlike some devices of the prior art, it does not require that any load be applied for the locking action of the clip to be effective, and it works without applying torques to the rebar members.
  • the spring actuated return locking waist on the clip which serves as a spring actuated return memory cinch and which grips one of the rebar members with a pinching action within the elastic limit of the clips composition from the spring actuated return, while its two leg, foot, and toe portions encircle, cradle, and support the other rebar member, providing a high surface area of contact with minimal use of material.
  • Another important feature of the machine feedable clip is its versatility in that it can be used to affix a first straight rebar to a second straight rebar, and/or straight rebar to curved rebar, and/or a first curved rebar to a second curved rebar.
  • Another example of the machine feedable clip's versatility is its ability to effectively secure smaller diameter sizes of horizontal rebar to the ideally sized vertical rebar.
  • This versatility enables the use of different sizes of rebar for the horizontal members in a 90 rebar framework. It would be cost effective to manufacture a clip that would suitably attach to different sizes diameter of rebar.
  • the clip could be manufactured to preferably ideally fit one size of vertical rebar, and a different size diameter of horizontal rebar. As an example, this could be especially useful when vertical rebar members are used in combination with horizontal wire cable members, since there is a great tensile strength difference between rebar and cable, with the cable being much stronger, and a size of cable chosen to match the strength of the vertical rebar members could be much smaller in diameter than the rebar members.
  • a further object of the present invention is to provide a rebar attachment system and method of the character described, the accurate placement of which permits ready and easy adjustment of the crossing location of the rebar members.
  • This is effected in accordance with the present invention through removal of the machine feedable clip by using a simple hand held removal tool applied to the two recurved toe tip portions of the machine feedable clip, thus releasing it, and thereby removing the force holding the two rebar members together, which then allows rapid and easy adjustment (up, down, or sideways) of the crossing rebar members to their new preferred position, whereupon a new machine feedable clip can be applied, thereby effecting the rapid and easy refastening of the two rebar members in their new preferred adjusted positions.
  • the jaws of the removal may be manufactured onto the various versions of the clip gun.
  • attachment of the clip may be readily accomplished by high speed machine operation placement means in which the operator and workers have both hands free, or alternatively by a hand-held gun with indented, brightly colored sighting and aiming guides, and provided with an automated clip feeder system, which uses only one hand for holding, aiming, and positioning the clip gun and installing the clip, or alternatively by a simple and easy one-handed manual procedure.
  • the machine feedable clips can attach rebar very close together to secure rebar element intersections such as low mass high strength foundation tension rings requiring a high degree of strength, structural stress tolerance, and durability such as are required in wind and seismic resistant structures, and ferrocement boat hulls which require rebar intersections to be very close together, and the machine feedable clips can be applied in a confined space from either or both sides of the rebar rod framework such as bridge reinforced frameworks. In situations where the intersections of rebar members are very close together, additionally the clip does not excessively impede the flow of cementiciou ⁇ material.
  • the machine feedable clip allows affixing rebar members at intersections which are in very close proximity to each other such as blind installation or reinforced concrete repair work, which proximity is limited only by the thickness of the rebar element plus the thickness of the clip.
  • Another important feature of the present invention which adds to its versatility, is that it is a light weight portable system, which can be operated by hand in a manual operated configuration, or which can be an automatic, power driven version operated by a mechanized or robotically controlled boom arm which holds and operates the easily fitted attachment tool, which contains a plurality of the machine feedable attachment clips.
  • the boom arm may be controlled manually, or by an automated mechanical system, or by a robotic control system, such as the boom armature system described in Giles U.S. Patent No. 5,305,576.
  • Fig. 1 is a top plan view of a rebar clip of this invention
  • Fig. 2 is a side elevation thereof
  • Fig. 3 is a perspective view thereof;
  • Fig. 4 is a top plan view of the rebar clip of this invention as installed to secure a section of horizontal rebar to a section of vertical rebar;
  • Fig. 5 is a side elevation view thereof
  • Fig. 6 is a front elevation view thereof;
  • Fig. 7 is a rear elevation view thereof;
  • Fig. 8 is a bottom plan view thereof
  • Fig. 9 is a perspective view thereof.
  • Fig. 10 is a side elevation view thereof, with the clip having been installed upside down;
  • Fig. 11 is a top plan view of a pair of rebar clips of this invention as installed to doubly secure a section of horizontal rebar to a section of vertical rebar;
  • Fig. 12 is a side elevation view thereof;
  • Fig. 13 is a front elevation view thereof;
  • Fig. 14 is a rear elevation view thereof
  • Fig. 15 is a bottom plan view thereof
  • Fig. 16 is a perspective view thereof;
  • Fig. 17 is a top plan view of a pair of rebar clips of this invention in an alternative installation to secure a section of horizontal rebar to a section of vertical rebar;
  • Fig. 18 is a front elevation view thereof;
  • Fig. 19 is a top plan view of a removal tool for the rebar clip of this invention;
  • Fig. 20 is a side elevation view thereof
  • Fig. 21 is a bottom plan view thereof
  • Fig. 22 is a perspective view thereof;
  • Fig. 23 is a perspective view of a boom-mounted installation tool (clipping gun) for the rebar clip of this invention;
  • Fig. 24 is a side elevation cross-sectional view thereof illustrating a magazine of rebar clips being installed into the barrel of the installation tool, the clipping gun;
  • Fig. 25 is a side elevation cross-sectional view thereof illustrating the clips in the interior of the magazine and a rebar clip having been fed into the installation tool;
  • Fig. 26 is a side elevation cross-sectional view of the installation tool (clipping gun) ) , illustrating a rebar clip being placed over the juxtaposed rebar sections;
  • Fig. 27 is a side elevation cross-sectional view thereof illustrating a rebar clip having been installed over the juxtaposed rebar sections;
  • Fig. 28 is a side elevation view in partial cross- section of a hand-held installation tool for the rebar clip of this invention.
  • Fig. 29 is a side elevation cross-sectional view of the anterior portion of the installation tool, the clipping gun, during the firing sequence thereof, illustrating the point in time just after the most dorsal clip has been removed from the magazine by the dorsal portion of the hammer.
  • Fig. 30 is a side elevation cross-sectional view thereof, later in the firing sequence illustrating the clip having been rotated clockwise for proper engagement of the rebar.
  • Fig. 31 is a side elevation cross-sectional view thereof, still later in the firing sequence illustrating the contact between the vertical rebar member and the bight of the clip with the clip rotated to its most extreme clockwise position, and the toes of the clip poised to engage and encircle the horizontal rebar member, and the dorsal portion of the hammer immobile against the vertical rebar member and only the ventral portion of the hammer continuing to move anteriorly in the firing sequence.
  • Fig. 32 is a side elevation cross-sectional view thereof showing the clip securely attached to and providing a locking action for the two rebar members, and the ventral section of the hammer at its most extreme anterior extent, and the spring of the dorsal section of the hammer at its most compressed point, just prior to the commencement of the withdrawal portion of the firing sequence, in which the hammer is withdrawn posteriorly into the barrel of the clipping gun.
  • the device ( Figures 1, 2, and 3) of the present invention is designed for securing together engaged and overlapping rebars .
  • the device is a clip, a machine feedable clip, designed for rapid and high speed application in automatic, robotic, semiautomatic, and/or manual application processes, and is designed to accurately and securely affix intersecting rebar members.
  • the angle of intersection of the engaged and overlapping rebars may be 90°, as when one rebar is vertical [1] and the other rebar is horizontal [2] , however, other angles of intersection 14 are also possible and can be effectively secured together with the present invention through an effective range of approximately plus and minus 5% around 90°, and could be a greater range depending upon applications and engineering conformational tolerance requirements.
  • the machine feedable clip comprises briefly a suitably formed piece of stiff material with suitable elastic limit, such as carbon spring steel, with a high tensile range of ideally 200,000 psi (pounds per square inch) (9-12 gauge wire is suitable for most rebar attachment applications) , which has one plane of symmetry, a vertical plane, which in Figure 4 would include the longitudinal axis of the vertical rebar [1] , and which plane of symmetry would intersect the longitudinal axis of the horizontal rebar [2] at an angle of 90°.
  • suitable elastic limit such as carbon spring steel
  • the shape of the machine feedable clip may be described with respect to two perpendicularly intersecting planes, a vertical plane which includes the longitudinal central axis of the vertical rebar [1] , and which intersects the horizontal rebar' s longitudinal central axis at an angle of 90°, and a horizontal plane which includes the longitudinal central axis of the horizontal rebar [2] , and which intersects at the vertical rebar' s longitudinal central axis at an angle of 90°.
  • the vertical plane is the one and only plane of symmetry of the machine feedable clip.
  • the bottom of the "U” [4] is a curved mid-portion of the machine feedable clip [the proximal central portion] which is sized to seat on the posterior side [7] of the vertical rebar [1], i.e. the side away from the horizontal rebar [2] .
  • the inside surface [5] of this curved mid-portion, or proximal central portion contacts the posterior surface [7] of the vertical rebar.
  • This proximal central portion is similar to a waist circling the vertical rebar [1] .
  • This waist on the clip serves as a cinch and affords a far tighter grip on the vertical rebar [1] than would be possible with only 180° of encirclement, and the stiff resiliently yielding composition of the material creates a spring activated tension by which the vertical rebar is gripped or pinched by the curved mid-portion, or proximal central portion, of the machine feedable clip.
  • the curved portion extends from the exact proximal center of the curved portion [4] both clockwise and counterclockwise around the vertical rebar [1] .
  • the curvature extends in the horizontal plane both clockwise 135° and counterclockwise 135° from the proximal center [4] .
  • the clockwise 135° point is at [18] and the counterclockwise 135° point is at [19] . It is at these points [18 and 19] that the two legs of the machine feedable clip begin, and they begin by deflecting 45° out of the horizontal plane, which is a downward 45° deflection in the side elevation of Figure 5.
  • the two legs [10 and 11] are dimensioned to extend from the two 135° points [18 and 19] on the anterior side of the vertical rebar [1] downward ( Figure 5) and forward toward the bottom of the horizontal rebar, and away from the proximal midpoint [4] of the curved portion.
  • the vertical planes through each of the two legs [10 and 11] are not perpendicular to the central longitudinal axis of the horizontal rebar [2] , and the two legs are not exactly parallel to each other, but rather are splayed outward slightly.
  • each leg portion intersects a flattened "foot" portion [12 and 13] at a 45° angle, so that leg [10] , which was extending downward and anteriorly ( Figure 5) at a 45° angle intersects a horizontal "foot” portion [12] at a 45° angle.
  • leg [11] intersects a horizontal foot portion [13] at a 45° angle.
  • the feet portions [12 and 13] extend horizontally and anteriorly under the bottom of the horizontal rebar [2] , thereby supporting the horizontal rebar [2] .
  • the feet portions are in a plane parallel to the plane of the curved portion containing the proximal central point [4] .
  • the 45° leg portions [10 and 11] and the horizontal foot portions [12 and 13] and the arcuate toe portions [14 and 15] provide concavities sized to grip the horizontal rebar [2] and to be compatible with virtually all rebar surfaces (deformations) , and to effect supporting engagement thereof, whereby downward load imposed on the horizontal rebar will be translated by arcuate downward displacement of its leg portions [10 and 11] and feet portions [12 and 13] and toe portions [14 and 15] about its proximal center [4] as a fulcrum into lateral pressure of the posterior side [23] of the horizontal rebar [2] against the anterior side [6] of the vertical rebar [1] , and this lateral pressure serves to hold the two crossed rebar members more tightly locked together.
  • greater load is automatically met by greater locking force due to the novel design of the machine feedable clip.
  • leg [10] , foot [12] , and toe [14] fit around the horizontal rebar [2] and provide a nestled support therefor, and it will be understood, although not specifically shown, that on the other side of the vertical rebar [1] leg [11] , foot [13] , and toe [15] provide an identical function, and that together, both systems of leg, foot, and toe portions of the machine feedable clip hold the horizontal rebar [2] tightly against the anterior side [6] of the vertical rebar [1] .
  • the two combinations of leg, foot, and toe portions [10, 12, 14 together with 11, 13, 15] extend the support for the horizontal rebar from throughout the 180° range which lies below the horizontal center plane of the horizontal rebar [2] , and extends the contact and support with the horizontal rebar [2] even well above this horizontal center plane, reaching at least 30° above this center plane in the upward arcuate portion of each of the two toe portions of the machine feedable clip, between [14 and 16] in one toe portion and between [15 and 17] in the other toe portion.
  • the clip be formed of stiff, resilient material (a tensile strength in the range of 185,000 psi, to 210,000 psi, with 200,000 psi being ideal) so as to maintain its structural and conformational integrity.
  • the machine feedable clip would be preferably formed from cylindrical shaped material or the suitable shapes with diameters in range of 0.100 to 0.125 inches, and the ideal is 0.105 inches.
  • the ends of the wire clip can be rounded or conical. Flash heat cutting conicalizes the ends.
  • the clips could be produced by metal casting, and it has been found that hard tempered number 8 to 10 gauge carbon steel wire is suitable for use with a wide range of reinforcing rods (rebar sizes), e.g., number 2 rebar through number 5 rebar.
  • rebar sizes e.g., number 2 rebar through number 5 rebar.
  • One clip of standard size is suitable for securing together and holding rebar with a size range equal to the ideal size and any and all sizes below the ideal size rebar, provided that 90° crossings (vertical and horizontal) characterize rebar framework.
  • a clip designed and formed to secure two equal sized crossing bars may also be used to loosely secure all smaller sizes of crossing bars; that is a clip designed to secure, for example, number 7 rebars can also be used to secure number 6, 5, 4, 3, 2 sizes.
  • FIGS 11 through 16 show how clips are installed on both upside down and right side up, and how both placement positions can be combined at the same intersection of vertical [1] and horizontal [2] rebars.
  • Figures 17 and 18 depiction how two clips can be attached at the same intersection of two rebars, so that the planes of the two clips are oriented at 90° to each other.
  • This attachment is readily effected with the hand held or automatic clipping gun by rotating the gun 90° right or left around the longitudinal central axis of the barrel of the clipping gun.
  • the second clip's curved center portion [4] does not go around the vertical rebar [1] , but, instead, goes around the horizontal rebar [2] , so that the leg, feet, and toe portions of the second clip partially encircle and grip the vertical rebar [1] .
  • This arrangement of two clips would provide the maximum strength and resistance to combinations of vertical and horizontal forces, such as might occur in the rebar framework structure during concrete vibrating, pouring, or pumping, or in high wind gusts, or with workers climbing on the rebar framework structure, or during the shotcrete application process.
  • the unique design of the leave-in-place machine feedable clip permits attachments of clips in very close proximity, which is essential in close rebar placement. Given that there are structural strength advantages and cost savings, especially in using curvilinear or column rebar framework patterns instead of a rectangular (i.e. horizontal and vertical) framework pattern, the advantages of employing a 90° rotational offset in a two clip junction, with the clips also oriented front to back with respect to each other, are further enhanced.
  • curvilinear or spiral rebar framework patterns of, for example columns, arches, vaults, domes, etc. every horizontal force creates force vectors in the planes of both of the intersecting rebars, which are then best resisted by using two clips oriented front to back with respect to each other, and also having a 90° rotational offset to each other.
  • every vertical force on the rebar grid creates force vectors in the planes of both of the intersecting rebars, which also are best resisted by using two clips oriented front to back with respect to each other, and also with a 90° rotational offset to each other.
  • the horizontal rebar [2] is positioned at the desired elevation on the vertical rebar [1] .
  • the proximal central portion of the clip [4] is seated preferably on the posterior side [7] of the vertical rebar [1] or, alternatively (especially in non-rectangular rebar frameworks) , on the anterior side [22] of the horizontal rebar [2] .
  • the clip can be installed from either side of the rebar framework, and the determination of posterior or anterior positioning refers to the relative orientation of Figure 5, and depends upon whether the horizontal rebar is positioned inside the vertical rebar or outside the vertical rebar.
  • the tips of the toe portions of the clip [16 and 17] are slid under the horizontal rebar [2] , thereby contacting the ventral surface [20] thereof (see Figure 26) .
  • the tips of the toe portions [16 and 17] have a slight recurve which reverses the curvature of the arcuate portion of the toe portions [14 and 15] .
  • the recurve, or reversed curvature has several useful functions. First, during the installation process, the recurved toe portions [16 and 17] serve to guide the horizontal rebar into the concavities created by the two combinations of leg, foot, and toe portions of the clip [10, 12, 14 and 11, 13, 15) .
  • the recurved tips of the toe portions [16 and 17] guide the clip up from the ventral surface [20] of the horizontal rebar [2] and around the cylindrical surface of the horizontal rebar [2] toward and past the extreme anterior point [22] of the horizontal rebar [2] .
  • a completely separate function of the recurved toe tip portions [16 and 17] of the clip is to facilitate swift and easy removal of the clip, should such removal or adjustment be required, by the use of an appropriate removal tool shown in Figures 19 through 22.
  • the recurved toe tip portions [16 and 17] provide a gripping point and their length or height above the surface of the horizontal rebar provides a lever arm to effect their removal.
  • the position of the toe tip portions may be located in the horizontal plane by extending tangent lines from the two 90° points [8 and 9] , which points are each 90 of arc away from the proximal center point of the clip [4] .
  • These two tangent lines from points [8 and 9] are parallel to each other and are perpendicular to the central longitudinal axis of the horizontal rebar. At the point that these two tangent lines cross the anterior surface [22] of the horizontal rebar [2] , they intersect, respectively, the two toe portions [14 and 15] of the clip.
  • Figures 24 through 27, together with Figure 23 show a tool in one preferred implementation of the present invention, such as might be attached to the end of a mechanized boom, a robotic arm, or other tool system, for the rapid automated installation of the clips.
  • this tool can rotate and pivot on the end of the mechanized boom, and provided that such rotation is in a plane perpendicular to the central longitudinal axis of the mechanized boom, then it is possible to install clips right side up (as in Figure 5) and upside down (as in Figure 10) , and both right side up and upside down as in Figures 11 through 16.
  • the worker using the hand tool can work in tandem with the automated, mechanized boom arm with attached automatic clipping gun on the end of the armature boom, preferably securing the same rebar intersections well ahead of or well behind the automated clip installation process having significant advantages in constructing complex reinforced concrete structures subject to asymmetrical forces or temperature fluctuations requiring a high degree of structural tolerance.
  • any downward force exerted upon the horizontal rebar [2] produces downward displacement of the horizontal rebar [2] , which, in turn, produces downward arcuate movement of the leg, feet, and toe portions, which wedges a slight opening of the concavities formed by each pair of leg, foot, and toe portions of the clip [10, 12, 14 and 11, 13, 15] .
  • the wedging action causes an increased spring actuated return gripping force of the leg, foot, and toe portions of the clip [10, 12, 14 and 11, 13, 15] .
  • the wedging action causes an increased spring actuated return gripping force of the legs, feet, and toes of the clip, which is exerted on and about the horizontal rebar [2] by the leg, foot, and toe portions [10, 12, 14 and 11, 13, 15] of the clip, and this spring actuated gripping force increases continuously (up to the structural and conformational elastic limits of the clip) as the downward force upon and downward displacement of the horizontal rebar [2] increases.
  • the horizontal rebar [2] is gripped and held, with ample elastic limit and high surface area of contact, by the straight leg portions, the flat feet portions, and the arcuate toe portions of the clip. While the initial contact point of the legs [10 and 11] with the posterior ventral surface of the horizontal rebar is approximately 45° below the horizontal center plane of the horizontal rebar [2] , nevertheless the arcuate toe portions [14 and 15] curve up sufficiently far around the anterior dorsal surface of the horizontal rebar [2] that contact is maintained up to approximately 45° above the horizontal center plane of the horizontal rebar [2] .
  • This 180° of opening affords easy insertion of the clip's two leg, foot, and toe portions around the horizontal rebar, or, alternatively stated, affords easy insertion of the horizontal rebar [2] into the concavity of the clip created by the legs, feet, and toes of the clip.
  • the clip contacts and restrains the horizontal rebar from a point midway between the toe tip [16] and the anterior extremity of the arcuate toe portion [14] , which contact point is approximately 45° above the horizontal center plane of the horizontal rebar [2] .
  • Contact between the clip and the horizontal rebar [2] continues counter clockwise along the arcuate toe portion to the flat foot portion [12] , with only a slight break in contact with the horizontal rebar [2] at the angular junction of the foot portion [12] with the leg portion [10] , and the contact continues up to the mid portion of the leg [10] , which is approximately 45° below the center plane of the horizontal rebar [2] .
  • the restraint of movement imposed on the horizontal rebar [2] is not limited to just that portion of the horizontal rebar [2] which is gripped by the leg, foot, and toe portions of the clip, since the posterior surface [23] of the horizontal rebar [2] directly contacts the anterior surface [6] of the vertical rebar [1] , which also restrains the movement of the horizontal rebar [2] .
  • the horizontal rebar has an opening of less than 90 of arc through which to escape the grip of the clip.
  • the reinforcement rod is traditionally constructed as long cylindrical rods, and, of course, no 360 cylinder can escape through an aperture comprising only 90° of its arc, which causes any rebar framework pattern which is restrained by clips of the design of this invention to be strong, accurate, sound, and exceedingly resistant to displacement or dislodgment from virtually any source of force vectors even including combinations which result in rattling or shaking or vibration of the clipped rebar framework structure.
  • the recurved toe portions between the toe tips [16 and 17] and the point at which the arcuate portion of the toe portions first contact the horizontal rebar [2] which is between [16] and [14] on one toe and between [17] and [15] on the other toe, these comprise lever arms for springing open the concavities which support and contain the horizontal rebar [2] .
  • This action of springing open the containing concavities may be readily obtained by the simple expedient of pulling anteriorly and then ventrally on the toe tip portions [16 and 17] , which may be expeditiously accomplished by a worker using that edge of one hand which is most distant from the thumb, leaving his other hand free to support or to move the horizontal rebar at or to the desired position.
  • adjustment of the positions of the horizontal [2] and/or vertical [1] rebars may be effected, whereupon a new clip may be re-attached.
  • a simple hand tool may be used to effect the removal of the clip as in Figures 19 through 22.
  • the toe tip portions comprising the two ends of the material comprising the machine feedable clip may be flash heat cut, and the ends may be preferably rounded or conical in shape.
  • the clip may also be coated with a protective corrosion resistant material such as paint, plastic, epoxy, or Teflon, and may usefully be color coded with one or more colors, to indicate useful parameters such as sizes of rebar.
  • Each location specified in a rebar framework can be the locus of an intersection of rebar members requiring a reliable locking engagement effected through the application of the machine feedable rebar clip, which clip is applied by the automated clipping gun attached to the end of the boom arm system, as in U.S. Patent #5,305,576 (Giles, 1994) , or by a portable ergonomic hand held clipping gun.
  • the armature boom arm is suitably positioned in angular and radial extent, so that the guide member(s) [the four rebar receiving guide holes or guiding grooves indented into the anterior working face] of the clipping gun can be positioned and aligned with, and can engage the intersecting rebar members.
  • This operation requires 6-axis control of the working face of the anterior end of the clipping gun, which six axes are the three dimensions of position (the standard 3 rectangular or 3 polar coordinates) plus the 3 angles of orientation: roll, pitch, and yaw.
  • these 6 axes may be controlled to yield the desired effect of correct position and correct orientation, or under manual control by an operator the correct position and orientation can be determined simply by visual and tactile cues, - i.e., by
  • the operator of the clipping gun would be able to feel the clipping gun's guide groves on the anterior working face engage the rebar members forming the junction at which the clipping action is to occur, and when the operator feels the rebar rod members within the guide groves, the operator feels that the clipping gun and the rebar members are properly positioned to permit the firing action of the gun, which causes a clip to be extracted from the magazine and ejected from the clipping gun and to engage the rebar members with suitable force and orientation to effect the secure and locking engagement thereof by the machine feedable clip.
  • One typical sequence of the rebar clipping operation begins with the mechanized armature boom arm withdrawn radially from the maximum radial extent required to reach the intended site of the 3-dimensional location of the first intended rebar attachment location, and begins with the mechanized armature boom arm thus radially withdrawn in order to freely adjust the roll, pitch, and yaw angles of the clipping gun by suitable automatic mechanical or servomechanisn control .
  • the location and orientation of each rebar junction which requires clipping is precisely known, and this information is appropriately coded and encoded for either the mechanical or the electronic controller of the mechanized armature boom arm.
  • This action of adjusting the roll, pitch, and yaw angles of the clipping gun is performed, in this partially radially withdrawn position of the mechanized armature boom arm, by using the mechanical or electronic controller's internally coded information and specifications regarding the 3-dimensional coordinates and the orientations of the rebar members which must come together and intersect at this location, and then be clipped together.
  • These rebar members thus must either already intersect at, or must be made to intersect at, the first intended site of clipping action, being manually held or held by other mechanical means.
  • the boom arm is adjusted angularly to the correct coordinates and then extended radially to position the anterior working face of the automatic clipping gun at the proper location and in the correct orientation for the clipping process at the first intended rebar junction.
  • the intersecting rebar members [1 and 2] are already correctly positioned and oriented relative to each other and are also correctly positioned in the frame of reference of the engineered design of the rebar framework using 3 dimensional coordinates, they will enter the guide holes or grooves [103, 104, 105, and 106] of the end piece of the automatic clipping gun, which is at the anterior surface [the v.-orking face] of the automatic clipping gun, as the boom arm extends radially to the pre-calculated position.
  • the automatic clipping gun has already been oriented so that the rebar member nearer the gun [1] has entered the deeper pair of the guide holes or grooves [105 and 106] and the rebar member further from the automatic clipping gun [2] has entered the shallower pair of the guide holes or grooves [103 and 104] . At this time the action of the clipping gun can begin.
  • the clipping gun mechanism is then activated or fired.
  • the motive force of this firing mechanism can be pneumatic, hydraulic, electric, magnetic, compressed mechanical energy, and chemical propellants and/or exploding cartridges such as propane, butane, etc.
  • the motive force is supplied by a hand squeezed trigger [125] actuated mechanism or power could be supplied by some other mechanism not illustrated.
  • a two section hammer In the firing sequence, a two section hammer, the dorsal section of which is spring loaded, is driven anteriorly toward the rebar junction by a shaft mechanism [107] within the barrel or chamber [108 and 109] of the automatic clipping gun mechanism.
  • the motive force of the firing mechanism is transmitted by the driving shaft [107] of the hammer, which impels anteriorly two different sections of the hammer: a ventral section [110] and a dorsal section [111] , depicted in Figures 24 and 25.
  • the anterior [working] surface of the hammer has distinctly different, and slidably separable, dorsal [111] and ventral [110] sections.
  • the dorsal section [111] is spring loaded with a compressible spring [112] , whereas the ventral section [110] is not spring loaded.
  • the ventral section [110] is mechanically connected directly to the firing mechanism of the automatic clipping gun
  • the ventral section [110] is designed to extend partially out the end of the chamber of the clipping gun, and it features a deep "U" shaped notch in its center section to provide a concavity to admit the nearer rebar member [1] when the ventral section [110] of the hammer is moving toward its fullest anterior extent.
  • the dorsal section [111] of the hammer is sized and shaped so as to intersect the dorsal portion [113] of a spring-loaded magazine [114] of machine feedable rebar clips, which magazine [114] has a housing which is removably attached to the ventral surface [109] of the barrel of the automatic clipping gun by a retainer clip [115] X.
  • the magazine [114] installed on the ventral surface of the barrel of the clipping gun, the magazine and exterior provides protection to the hands which holds the gun and operates the trigger mechanism, the ventrally extending magazine serving to guard against inadvertent contact between the hand and the rebar members.
  • the dorsal portion of the hammer [111] moves rapidly and forcefully anteriorly through the firing chamber of the automatic clipping gun, it intersects the dorsal portion of the clips magazine [113] in its rapid, forceful anterior movement, and with its clip receiver notch [124] , it intersects and extracts the most dorsal rebar clip [116] from the magazine, impelling the clip into anterior motion and initiating the clip into a ventral rotation of the anterior portion of the clip, which includes the two toe, foot, and leg portions of the clip.
  • the ventral surface of the ventral portion of the hammer occludes the clip feeding aperture of the magazine, through which feeding aperture rebar clips are serially admitted into the firing chamber of the automatic clipping gun, this occlusion thereby preventing entry of any other rebar clips into the firing chamber during the current action cycle, and thereby eliminating jamming of the automatic clipping gun.
  • the ventral rotation of the anterior (toe, foot, and leg) portions of the clip has the purpose of properly orienting the clip so that during its rapid anterior motion, its toe tip portions pass beneath the ventral surface [217] of the rebar member [2] which is further from the automatic clipping gun.
  • ventral rotation is complete and is terminated when the dorsal surface [118] of the ventral portion [110] of the hammer contacts one of the more ventral extensions of the clip at approximately the junctions of the clip's two foot and leg portions, one of which ir shown at [119] .
  • the dorsal surface [118] of the ventral portion of the hammer [110] is smoothly curving ventrally across its dorsal anterior lateral extent except for the deep "U" shaped notch concavity designed to admit the nearer rebar member [1] as the ventral portion 110] of the hammer extends anteriorly and reaches out of the anterior end of the chamber of the automatic clipping gun.
  • the dorsal surface [118] of the ventral portion of the hammer [110] 32 appears, in its lateral silhouette, approximately as a parabolic section. It curves ventrally toward its anterior leading edge, and it is not spring loaded, being directly mechanically connected to the driving shaft [107] of the hammer.
  • the dorsal portion of the hammer [111] is spring loaded, and before, during, and after the contact occurs between the dorsal surface [118] of the ventral portion of the hammer [110] and the point on the machine feedable clip [119] where the leg portion intersects the foot portion of the clip, the dorsal portion of the hammer [111] impels the clip anteriorly toward the clip's contact with the nearer rebar member [1] .
  • This contact occurs first in the curved cinch portion of the machine feedable clip, causing the curved portion to open slightly, i.e. to splay outward slightly, to admit the nearer rebar member [1] into the concavity of the cinch section, and this opening causes the two leg, foot, and toe portions of the clip to slightly splay outward.
  • Stopping any further anterior movemen- of the dorsal section of the hammer [111] at this point has the beneficial effect of not expelling the rebar junctio:. from the automatic clipping gun, which would be the res;,It of further anterior movement of the dorsal portion [111] of the hammer. Stopping the movement of the dorsal section of the hammer [111] at this point also helps f- insure that the clip does not dislodge.
  • the dorsal section is provided with spring loading, through a spring [112] in the dorsal section [111] of the hammer, the same spring loading which eased the removal of the clip from the dorsal extent [113] of the clips magazine.
  • the spring [112] which is positioned posterior to the dorsal portion [111] of the hammer, compresses, allowing the dorsal portion of the hammer [111] to remain motionless against the center of the posterior curved central portion of the machine feedable clip, which remains motionless and pressed against the posterior portion of the nearer rebar member [1] , and this motionless state of these components prevents the ejection of the engaged and intersecting rebar members [1 and 2] from the automatic clipping gun at the same time that the driving shaft of the hammer [107] continues to impel the ventral section of the hammer [110] in rapid anteriorly directed motion.
  • ventral section of the hammer [110] continues its rapid anterior movement, it contacts, in a sliding manner, the two most ventral extensions of the machine feedable clip, the two regions where the each of the two feet portions of the machine feedable clip intersect their associated leg portions [119] . Because of the paraboloid sectional shape of this ventral portion of the hammer [110] , this contact transmits both anteriorly and dorsally directed forces to the foot and leg portions of the machine feedable clip, which initiates a dorsally directed rotation of the anterior (leg, foot, and toe) portions of the machine feedable clip.
  • the motion of the clip includes its tilting upward, springing first open and then closed (around the rebar) .
  • this dorsal movement of the toe tip portions of the machine feedable clip continues until the toe tip portions achieve their most dorsal extent, having achieved entry of the anterior surface [21] of the anterior rebar member [2] into the concavity of the machine feedable clip comprised by the curving toe and foot portions of the machine feedable clip, which is also the final fully locked position of the machine feedable clip at this rebar junction.
  • ventral portion of the hammer [110] has reached its most anterior extent, and it extends past the posterior rebar member [1] , which occupies the notch between the two parabolic section faces [118] of the ventral portion of the hammer [110] .
  • the ventral portion of the hammer [110] begins to withdraw, being pulled posteriorly by the posterior motion of the driving shaft [107] of the hammer, thereby returning into the chamber of the automatic clipping gun.
  • the fully loaded spring activated tension on the spring [112 of tne dorsal portion of the hammer [111] is gradually unloaded to its resting state so that, at the achievement of this unloaded state, the dorsal portion of the hammer [111] -oins in the posterior withdrawal of the ventral portion of the hammer [110] into the internal chamber of the automatic clipping gun, pulled backward by the connecting rod [122] which slidably connects the dorsal and ventral portions of the hammer during the withdrawal, and limit- the maximum extension of the dorsal portion [111] .
  • the clipping gun can be initiated into a reposi ioning cycle, either by moving the manual form of the gun to a new rebar junction, or by the boom arm attachment beginning to withdraw radially to clear the automatic clipping gun's guide holes, or recessed guide grooves posteriorly away from the most recently affixed rebar junction, in preparation for movements angularly and radially, and in roll, pitch, and yaw angles suitable to the next rebar junction designated in the engineered design structural conformation for the rebar framework requiring affixing by a machine feedable rebar clip.

Abstract

Un système d'attache comporte un dispositif d'attache qui peut être distribué manuellement ou mécaniquement pour fixer et bloquer ensemble des tiges ou barres de renforcement (1, 2) croisée ou en contact l'une avec l'autre. Le dispositif d'attache comporte une partie médiane (4), une paire de branches (10, 11), une paire de pieds (12, 13) et une paire de bouts (16, 17).
PCT/US1996/004094 1995-03-24 1996-03-25 Attache distribuee manuellement ou mecaniquement pour fixer des barres d'armature WO1996030607A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU54312/96A AU5431296A (en) 1995-03-24 1996-03-25 Manual or machine feedable clip for securing rebar
JP8529581A JPH11502578A (ja) 1995-03-24 1996-03-25 リバーを固定するための手動又は機械送り可能クリップ

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US41009795A 1995-03-24 1995-03-24
US08/410,097 1995-03-24

Publications (1)

Publication Number Publication Date
WO1996030607A1 true WO1996030607A1 (fr) 1996-10-03

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JP (1) JPH11502578A (fr)
AU (1) AU5431296A (fr)
WO (1) WO1996030607A1 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998017879A1 (fr) * 1996-10-22 1998-04-30 Ib Andresen Industri A/S Procede de renforcement de beton arme et armature utilisee dans la mise en oeuvre de ce procede
WO2001029347A1 (fr) * 1999-10-18 2001-04-26 Peter James Hitchin Patte d'articulation et appareil
AU770061B2 (en) * 1999-10-18 2004-02-12 Peter James Hitchin Rod clip and apparatus
CN102691381A (zh) * 2012-06-06 2012-09-26 华侨大学 一种交错管杆件的简易固定装置
US20160069096A1 (en) * 2014-09-05 2016-03-10 Jon R. Kodi Clip Applying Apparatus
CN105863242A (zh) * 2016-05-27 2016-08-17 青岛圣合钢管制品有限公司 一种交叉式固定连接卡扣
CN107454919A (zh) * 2015-03-20 2017-12-08 蜘蛈株式会社 一触式钢筋绑扎夹子
RU180555U1 (ru) * 2017-08-21 2018-06-18 Федеральное государственное автономное образовательное учреждение высшего образования "Уральский федеральный университет имени первого Президента России Б.Н. Ельцина" Элемент для соединения арматурных стержней
US10519660B2 (en) 2017-06-09 2019-12-31 Gem Technologies, Inc. Key-locked and band-tightened rebar clamping assemblies

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Publication number Priority date Publication date Assignee Title
US1119123A (en) * 1913-05-31 1914-12-01 George R Schoenthaler Support and tie for concrete-reinforcing bars.
US1500832A (en) * 1923-05-28 1924-07-08 Concrete Steel Company Wire tie for reenforcing rods and bars
US1986528A (en) * 1931-02-09 1935-01-01 William F Ranger Concrete reenforcement
US1999508A (en) * 1933-11-16 1935-04-30 William E Mathews Reenforcing rod tie
GB589447A (en) * 1945-01-15 1947-06-20 George Frederick Charles Caswe Improvements in scaffolding and like clips
US2523785A (en) * 1946-08-20 1950-09-26 Sereno Paolo Resilient clamping device for framework elements
US2893698A (en) * 1957-03-18 1959-07-07 Babcock & Wilcox Co Superheater tube support
US4641991A (en) * 1984-06-29 1987-02-10 Yuhei Yaoita Connector for reinforcing rods

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1119123A (en) * 1913-05-31 1914-12-01 George R Schoenthaler Support and tie for concrete-reinforcing bars.
US1500832A (en) * 1923-05-28 1924-07-08 Concrete Steel Company Wire tie for reenforcing rods and bars
US1986528A (en) * 1931-02-09 1935-01-01 William F Ranger Concrete reenforcement
US1999508A (en) * 1933-11-16 1935-04-30 William E Mathews Reenforcing rod tie
GB589447A (en) * 1945-01-15 1947-06-20 George Frederick Charles Caswe Improvements in scaffolding and like clips
US2523785A (en) * 1946-08-20 1950-09-26 Sereno Paolo Resilient clamping device for framework elements
US2893698A (en) * 1957-03-18 1959-07-07 Babcock & Wilcox Co Superheater tube support
US4641991A (en) * 1984-06-29 1987-02-10 Yuhei Yaoita Connector for reinforcing rods

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998017879A1 (fr) * 1996-10-22 1998-04-30 Ib Andresen Industri A/S Procede de renforcement de beton arme et armature utilisee dans la mise en oeuvre de ce procede
US6216412B1 (en) 1996-10-22 2001-04-17 Ib Andresen Industri A/S Method for the reinforcement of reinforced concrete and reinforcement for use thereof
WO2001029347A1 (fr) * 1999-10-18 2001-04-26 Peter James Hitchin Patte d'articulation et appareil
AU770061B2 (en) * 1999-10-18 2004-02-12 Peter James Hitchin Rod clip and apparatus
CN102691381A (zh) * 2012-06-06 2012-09-26 华侨大学 一种交错管杆件的简易固定装置
US20160069096A1 (en) * 2014-09-05 2016-03-10 Jon R. Kodi Clip Applying Apparatus
US9797148B2 (en) * 2014-09-05 2017-10-24 Kodi Klip, Llc Clip applying apparatus
CN107454919A (zh) * 2015-03-20 2017-12-08 蜘蛈株式会社 一触式钢筋绑扎夹子
CN107454919B (zh) * 2015-03-20 2020-04-28 蜘蛈株式会社 一触式钢筋绑扎夹子
CN105863242A (zh) * 2016-05-27 2016-08-17 青岛圣合钢管制品有限公司 一种交叉式固定连接卡扣
US10519660B2 (en) 2017-06-09 2019-12-31 Gem Technologies, Inc. Key-locked and band-tightened rebar clamping assemblies
RU180555U1 (ru) * 2017-08-21 2018-06-18 Федеральное государственное автономное образовательное учреждение высшего образования "Уральский федеральный университет имени первого Президента России Б.Н. Ельцина" Элемент для соединения арматурных стержней

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JPH11502578A (ja) 1999-03-02

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