EA009186B1 - Lock for reinforcement bars - Google Patents

Abstract

The invention relates to construction engineering, more particular, to designs for locking intersecting reinforcement bars in reinforced concrete articles.The inventive task is aimed at designing a lock providing improved manufactubility and low material capacity.The lock is characterized in that it comprises U-shaped holders with elastic branches for locking intersecting pairs of reinforcement bars and connected so that the holders for one and the same bar (4) are arranged along the axis of this bar in parallel planes perpendicular to said axis. The elastic holder branches are made as loops (1,2) smoothly transforming into one another, one loop group (1) forms holders for bar (4) locking, the second loop group (2) connects the first loop group therebetween. The second group (2) forms a lock support in a reinforcement structure. The loops (2) forming the lock support have straight sections (3) determining the height (h) of said support. The loops (1) forming holders for different bars (4) have similar or different aperture diameters.The lock is made from a wire stretch having either uniform or die-rolled sections forming a corresponding aperture shape for each of loop (1) for bar holders. The free ends (5) of wire stretch are butt or lap connected and tied by welding or soldering.The locks are manufactured using universal or automatic bending machines.

Description

The invention relates to the field of construction, more specifically to structures for fixing intersecting reinforcing bars in reinforced concrete products.

Known latch [1] for connecting intersecting reinforcing rods, the design of which contains a polyhedron made in the form of a rectangular parallelepiped, with a groove for rods in the form of a dihedral angle with a rounded tip. In this case, the polyhedron has a second groove intersecting with the first groove. The grooves in relation to each other are angled from 90 to 45 °.

The disadvantage of the latch is that it is material-intensive in the manufacture, and when using it does not allow rigidly connecting the intersecting rods to each other.

Known retainer retainer [2], made in the form of a clamp containing two saddles and two hooks interconnected in such a way that it is possible with the help of fingers to fix single or intersecting reinforcing bars.

The disadvantage of this clamp is the need to unclench the hooks before installation, which complicates the mechanization of the fixation process.

Known latch [3] for connecting intersecting reinforcing rods, containing connected by a jumper parallel branches with gripping openings and supports with stiffeners. The gripping openings in the area between the bridge and the legs of the branches are formed by elastic arcs, and the supports are made in the form of sectors bounded by radii of different lengths.

The lack of design of this lock is the complexity of its manufacture.

As a prototype, a retainer [4] was chosen for connecting intersecting reinforcing rods consisting of I-shaped grippers with elastic branches, serving for fixing the intersecting pair of reinforcing rods and interconnected in such a way that the grips for the same fixed rod are located along the axis placing this rod in parallel planes perpendicular to the specified axis.

The disadvantage of the prototype is that it is difficult to manufacture.

The problem solved by the invention, is to create the design of the latch, providing improved manufacturability and low consumption of materials during its manufacture.

The solution of the task is ensured by the fact that in the proposed retainer for reinforcing rods the elastic branches of the grippers are made in the form of loops, seamlessly passing one into another, with one part of the loops forming the grips for fixing the rods, and the second interconnects the first part of the loops. The second part of the loops can form a clamp support in the reinforcement structure. The hinges that form the fixer support have straight sections that define the height of this support in the reinforcement structure.

Loops that form grippers for different fixed rods may have the same or different diameters of the openings. The latch can be made of a piece of wire with a constant cross section of various shapes or from a wire with a periodic profile that forms the corresponding profile of the aperture of each of the loops forming the grips for the rods. The free ends of a piece of wire can be butt-joint or overlapped or interconnected by welding or soldering.

The invention is illustrated by drawings: in FIG. 1 shows a general view of the lock, and FIG. 2 shows a retainer mounted on reinforcing bars intersecting at 90 °.

Clamp for reinforcing rods are made of wire. The latch consists of I-shaped grippers with elastic branches, made in the form of loops (1, 2), smoothly passing one into another. Grips with elastic branches serve for fixing the intersecting pair of reinforcing bars and are interconnected in such a way that the grips for the same fixed rod (4) are located along the axis of the location of this rod in parallel planes perpendicular to the specified axis. One part of the loops (1) forms the grippers, designed to fix one of the connected rods (4), and the second part of the loops (2), is designed to connect the first part of the loops (1) and the clamp support in the reinforcement structure. The height (11) of the support of the connected reinforcing structure and, consequently, the thickness of the protective layer of concrete in reinforced concrete structures depends on the size of the intermediate straight sections of the wire (3).

The free ends (5) of the wire are brought together to each other and are interconnected butt or overlap, weld, glue or solder.

Clamps are made on universal bending equipment or on machines designed for wire bending.

The wire for the manufacture of the clamp is unwound from the coil and bent in different planes with the help of special tooling.

The radii of the loops (1) of the clamp can be of the same size, when connecting rods of the same diameter (4). When connecting rods (4) with different diameters, the radii of the loops (1) intended for fixing each rod are made in accordance with its diameter, and the diameters of the loops located on different axes differ in size.

For the manufacture of the retainer use wire with a cross section of various shapes, such as round, oval, rectangular, multi-faceted, in the form of an asterisk or a periodic profile.

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The support loop (2) perform different lengths due to the straight section (3) and depending on the purpose of the latch.

The clamp is installed on the reinforcing bars manually or with the help of special devices, applying force to the fixing loops in the direction of the bars. Due to the geometry and elastic forces of the locking loops, they compress and hold the rods, fixing them together.

Information sources:

1. CI 2149962, Latch for reinforcing bars, 05/27/2000.

2. SHO 94/29543, Double hook for clamping intersecting rods, 12/22/1994

3. 8I 1486581, Clamp for connecting intersecting reinforcing bars, 06/15/1989

4. I8 4110951, Clamp for connecting reinforced concrete rods, 09/05/1978 (prototype).

Claims (7)

CLAIM 1. A retainer for reinforcing rods, consisting of C-shaped grippers with elastic branches, serving for fixing the intersecting pair of reinforcing rods and interconnected in such a way that the grippers for the same fixed rod (4) are located along the axis of their placement rod in parallel planes perpendicular to the specified axis, characterized in that the elastic branches of the grippers are made in the form of loops (1, 2), seamlessly passing one into another, with one part (1) of the loops forming grips for fixing the rods (4), and at oraya (2) connects the first hinge part (1). 2. The latch according to claim 1, characterized in that the second part of the loops (2) forms the latch support in the reinforcement structure. 3. The latch according to claim 2, characterized in that the loops (2) that form the latch support have straight sections (3) that define the height (I) of this support in the reinforcement structure. 4. The latch according to claim 1, characterized in that the loops (1), forming the grippers for different fixed rods (4), have the same or different diameters of the openings. 5. The latch on PP.1-4, characterized in that it is made of a piece of wire with a constant cross section of various shapes or wire with a periodic profile, forming the corresponding profile of the opening of each of the loops (1), forming the grips for rods (4). 6. The retainer according to claim 5, characterized in that the free ends (5) of a piece of wire are butt or overlapped. 7. The latch according to claim 6, characterized in that the free ends (5) of a piece of wire are interconnected by welding or soldering.