SU842165A1 - Clamp for securing reinforcement bars - Google Patents

Description

(54) CLAMP FOR FITTING ARMS

I

The invention relates to devices for fixing reinforcement in the manufacture of prestressed concrete products.

A clamp is known for fastening reinforcement bars containing a ferrule with a conical inner surface mounted in a housing and conical clamping plates with transverse grooves 1 arranged therein.

A clamp of the same designation is also known, containing an anchor plate with a hole in which conical semi-ribs are installed with clamping plates covering the reinforcement and protrusions that are made in the form of packages of movable clamping wedge brackets and spring-loaded wedge gaskets 2 installed between them.

The disadvantage of these clips is their limited use. They are used only to fasten reinforcing bars of a periodic profile.

Closest to the invention is a clamp for fixing reinforcing bars, comprising a housing with a longitudinal groove, rounded locking protrusions on the sides of the groove and a discharge chamber 3 beneath the locking protrusions.

The disadvantages of the known clamping are the fragility of the fixing protrusions and the unreliability of the fixing of the reinforcing bars, which deteriorates as the fixings wear out, their protrusions.

The purpose of the invention is to ensure the durability of the locking protrusions and increase the reliability of fixing reinforcing bars.

This goal is achieved by clamping the reinforcement bars, comprising a body with a longitudinal groove, rounded locking protrusions on

the lateral sides of the groove and the discharge chamber G, performed under the locking lugs, are provided with inclined guides fixed above the housing groove, in which vertical grooves are formed, and crimping balls mounted in

the grooves are rotatable, wherein the grooves are located above each of the locking projections and the radius of the balls corresponds to the radius of the ridges of the projections.

FIG. 1 shows the proposed clamp, a longitudinal section; in fig. 2 - cut. A-A in FIG. one; in fig. 3 shows a section BB in FIG. one; in fig. 4 shows a section B-B in FIG. 2

The clamp consists of a housing G with a longitudinal groove 2, on the sides of which in the notches there are clamps 3 and 4 with rounded locking lugs 5, under which an unloading chamber 6 is formed. Over the groove 2 of the housing there are fixed oblique guides made in the form of a bracket 7, in which vertical grooves 8 are formed and crimping balls 9 are mounted for rotation, the radius of which corresponds to the rounding radius of the locking projections 5. The grooves 8 with the balls 9 are located above each of the locking projections 5. For higher In addition, the durability of the balls 9 in the guides can be mounted with fingers 10 with sockets for mounting the balls 9. The distance between the locking projections 5 on each side of the groove 2 corresponds to two diameters of the balls 9. The locking projections 5 located on opposite sides of the groove 2 are offset relative to each other. friend one diameter balls 9.

The clamp works as follows.

The end of the rebar 11 is inserted into the groove 2 of the housing 1 and is pushed down between the rows of compression balls 9, with the result that the grooves are squeezed out on the surface of the rod. As the reinforcing bar 11 is pushed further down, the extruded grooves slide onto the locking protrusions 5, as a result of which the reinforcing bar 1 1 is secured in the clamp.

After tensioning the reinforcing bars 11 and making the concrete product, the ends of the bars 11, which remain in the clamp, are cut. The fixing of the next rod 11 is carried out in a similar manner. In this case, the fixed rod pushes the remaining segment of the rod into the discharge chamber 6, from which it is then removed.

Claims (3)

Invention Formula A clamp for fastening reinforcing bars, comprising a longitudinal groove body, rounded locking points on the lateral sides of the groove and an unloading chamber under the locking lugs, characterized in that, in order to ensure the durability of the locking lugs and increase the reliability of fixing the reinforcing bars, above the housing groove by inclined guides, in which ver1; ikalbnye grooves are formed, and crimping balls installed in the grooves with the possibility of rotation, while avki disposed above each of the locking projections and the radius of the balls corresponds to the radius of rounding protrusions. Sources of information taken into account in the examination 1. French patent number 2207232, cl. E 04 C 5/00, published. 1974. 2. USSR author's certificate number 596701, cl. E 04 C 5/12, 1976. 3. USSR author's certificate number 691541, cl. Е 04 С 5/12, 1977. ЫЫ чп +:, +, iJUULlfntl s Ш Ш OuQfJU JU J Fig FIG. 2.