Classifications

• • 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
  • E04G21/123—Wire twisting tools
• • 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

• the invention relates to a device for securing super-Lnposed reinforcing rods by means of a length of wire that has been preformed into a substantially U-shaped staple, ccnprising a form piece with a U-shaped forming surface that is adapted to the staple, and with a casing having a receiving chamber for a staple located adjacent the opening of said U-shaped forming surface, the form piece and the casing being mounted so as to be mutually turned between an open position allowing two superimposed rods to be received in the space between the legs of the U-shaped forming surface and a closed position, in which the received rods are locked around, said casing acxx-oirnc ating a stamp which may be moved, through said receiving cnamber, towards the cross piece of the U-shaped fo ⁇ ning surface of the form piece to press the staple - with its legs directed f ⁇ rwardly - from the receiving chamber into the forming space of the form piece around the pair of rods contained therein, guiding grooves being
• This well-knc-wn device is to be preferred over other erribod-lments. due to the lower one of the two SLTperimposed reinforcing rods being supported during the deformation of the preformed staple within the form piece so that the two rods are adequately pressed together.
• the form piece is provided in a rather elongated member, which forms - together with the casing that is also provided in a rather elongated element - a pair of pincers, the lower and upper jaws of which are formed by the form piece and the casing respectively.
• the pin ⁇ er-like device In the opened position the pin ⁇ er-like device is applied with its lower jaw extending below the two superimposed reinforcing rods so as to receive these rods into the forming space confined by the U-shaped forming surface. It is a drawback of this well-kncwn device, that its handling may be nindered by adjacent reinforcing rods which belong to the same reinforcing network. Due to the lower jaw (fo ⁇ iiing piece) being - in use - positioned completely below the plane of the ijpermost reinforcing rod, the use of the device for securing super-imposed reinforcing rods will be even impossible in case of a reinforcing net having a ,l mesh n which is smaller than the horizontal dimension of the form piece. The invention aims at to overcome the above drawback.
• the form piece is formed as a U-shaped brace, which is divided along the mid plane that is perpendicular to the plane of the brace, one part of the brace being fixedly c ⁇ rmected with the casing and the other part of the brace being mounted to be swung outwardly relative to said first part.
• a device cx_ ⁇ st.n ⁇ cted in accordance with the invention may be simply applied - with the form piece in the open position - around the two superimposed reinforcing rods, even in case of a "fine-mesh" reinforcing net.
• EE-A-3524821 discloses a device for securing cross-wise super:lmposed reinforcing rods, in which a form piece is used which consists of two hook-shaped portions. This device may also be used in case of relatively "fine-mesh" reinforcing nets.
• Fig. 1 is a perspective view iiliistxat-ing the principle of the method and of the device according to the invention
• fig. 2 is a side view of a practical e ⁇ ibodiment of the device according to the invention
• fig. 3 is a view, as seen from the right in fig. 2
• fig. 4 is a view along the line IV-IV in fig. 2 and 3
• fig. 5 is a cross-sectional view along the line V-V in fig. 2.
• two cross-wise super ⁇ iposed reinforcing rods are designated by dash-dotted lines W.
• W designates a substantially U- shaped form piece, the legs 2 of which extend from below upwardly through two opposite angles between the two cross-wise superimposed reinforcing rods.
• the legs 2 merge along an arc into the cross piece 3 of the U and have beveled edges 2a.
• the opposite faces of the legs 2 are provided with guiding grooves 4.
• the guiding grooves 4, 4a have e.g.
• This staple is pushed from above - with its free leg ends directed downwardly - (vide the arrow direction) into the space between the legs 2 of the form piece 1 by means of a stamp member 5 that acts on the cross piece K2 of the staple K.
• the staple legs KL, while moving through the guiding groove portions 4a - gradually bend inwardly and simultaneously deflect laterally from the plane of the K to spread apart.
• the U-shaped form piece 1 is divided along a mi ⁇ lane perpendicular to the plane of the U and consequently consists of two J-shaped halves or jaws 6 and 7.
• These jaws 6, 7 are pivotally connected about an axis 8 that is positioned within said mi ⁇ lane at a distannp above the cross piece of the U.
• the jaws 6, 7 may thus move one relative to the other between a closed position corresponding with the position of the U-shaped, form piece 1 in fig. 1 and an open position, in which the form piece 1 may be placed - with the open jaws - down over two superimposed rein ⁇ forcing rods W.
• the two jaws interlockingly engage one another by means of a centering hole and a corresponding centering projection 9 and 9a respectively.
• the jaw 6 is a fixed jaw, in the sense, that this jaw is extended at its upper end and fastened to the lower end wall 11 of a pneumatic actuating cylinder 10, the upper end wall 1 of which is connected to a carrying rod 3 provided with a handle 14.
• 15 designates a staple supply magazine, ocnprising upper and bottom walls 16, sidewalls 17 and an end wall 18, which is also fixedly connected to the cylinder end wall 11.
• the end wall 18 carries the pivot axis 8, about which the second jaw 7 is pivotally mounted through a laterally slightly offset arm 19.
• the pressurized air ccainection for operating the piston 20 has not been shown.
• the pressurized air supply may be e.g. controlled by means of a control valve provided on or adjacent the handle 14 and equipped with an appropriate actuating button.
• the piston 20, which may be moved against the action of a pressure spring 21, is pivotally connected at 22 to the stamp member 5, that extends with its lower end through a slot 23 in the lower cylinder end wall 11 into a chamber at the end of the magazine 15.
• the csross-secti ⁇ nal area of which corresponds with that of the slot 23 in the cylinder end wall 11 is delimited by the end wall 18 and the sidewalls 17 of the magazine and has on the bottom side a passage slot 24 towards the space, between the legs (jaws) of the U-shaped form piece 1, said passage 24 corresponding with the passage slot 23 in the cylinder end wall 10.
• a control means 25 of the B ⁇ wden cable type is provided for opening and closing the jaws 6 and 7.
• the stationary sheath 26 of this control cable is secured to the rarrying rod 13 and the upper cylinder end wall 12 at 27 and 28 respectively, whereas the cable core 29 is, at 30, connected to a manually operated lever 32 that is pivotally connected at 31 to the handle 14, and, on the other hand, is connected at 33 to the free end of the arm 16, to which the movable jaw 7 is secured, -formally, i.e. when the lever 32 is not squeezed, the pressure spring 34 holds the jaw 7 in the opened position. In this position the device may thus be placed down over a pair of siiperimposed reinforcing rods so as to secure the latter together.
• the jaws 6, 7 and the U-shaped form piece 1 may then be closed around the reinforcing rods to be secured by squeezing the lever 32.
• the piston 20 is in its upper position, with the lower end of the stamp member 5 resting an the cross piece of the foremost staple of the staple supply within the chamber, i.e. ready to perform an operative stroke.
• pressurized air is supplied to move the piston 20 and thereby the stamp member 5 downwardly.
• the example described hereinab ⁇ ve may be modified in various ways as far as the means for oontrolling the stamp member and the opening and closing of the jaws of the form piece are ⁇ ncerned.

Landscapes

• Engineering & Computer Science (AREA)
• Architecture (AREA)
• Mechanical Engineering (AREA)
• Civil Engineering (AREA)
• Structural Engineering (AREA)
• Wire Processing (AREA)
• Reinforcement Elements For Buildings (AREA)
• Paper (AREA)
• Superconductors And Manufacturing Methods Therefor (AREA)
• Laying Of Electric Cables Or Lines Outside (AREA)

Applications Claiming Priority (3)

Publications (2)

Family

ID=19862523

Family Applications (1)

Country Status (7)

Families Citing this family (3)

Family Cites Families (7)

• 1993
  • 1993-06-11 NL NL9301009A patent/NL9301009A/nl not_active Application Discontinuation
• 1994
  • 1994-06-13 JP JP7501615A patent/JPH08511312A/ja active Pending
  • 1994-06-13 WO PCT/NL1994/000139 patent/WO1994029549A1/fr not_active Ceased
  • 1994-06-13 AT AT94918606T patent/ATE149615T1/de not_active IP Right Cessation
  • 1994-06-13 DE DE69401942T patent/DE69401942T2/de not_active Expired - Fee Related
  • 1994-06-13 EP EP94918606A patent/EP0704013B1/fr not_active Expired - Lifetime
• 1995
  • 1995-12-08 KR KR1019950705583A patent/KR960702881A/ko not_active Withdrawn

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events