FR2627558A1 - Screw in anchor - is quickly fitted and may be reused - Google Patents

Abstract

The anchor (1) consists of a stiff wire twisted into a loop (3, 4) having a two start helical thread from whose outer diameter is from 1 1/2 to 2 times the diameter of the wire. The gap (2) allows the anchor to be hand screwed into soft materials, while harder materials may require the use of a hammer. In the case of materials such as concrete a plastics plug may be used with an internal helix to sail the anchor, or a hollow tube of the same form may be pre-cast into the concrete. USE/ADVANTAGE - Used to hold strings, wires and netting for horticultural purposes. The anchor may be fitted and removed with the minimum of tools.

Description

 The present invention relates to a device allowing the anchoring or fixing, as well as the rapid removal, of wires, bars or screens between them or on various supports.

 The laying of wires, bars or grids, or their assembly requires means such as, metallic, plastic or vegetable ties often requiring the use of tools, which significantly increases the cost of the intervention because disassembly - seasonal, especially in agriculture or horticulture rarely allows the reuse of links.

 The device according to the invention consists in reducing these drawbacks.

 It is a helical rider whose cylindrical and concentric turns are symmetrical with respect to the longitudinal axis of, together. This rider cannot be removed by the reactions of the objects it holds, because they pass through it, they prevent its rotation.

The pitch of the propeller, on the left or on the right, of the jumper's turns is, depending on the diameter of the wire, between 1.5 and 2 times their outside diameter in order to provide the largest possible passage between them, perpendicular to the axis for objects to fix. The number of turns is not less than one, but it is increased depending on the brittleness of the supports and the rigidity to be obtained.

 Depending on the hardness of the support, the ends: of the rider are rounded or pointed, it is planted by hand or hammered in using a small anti-expansion sleeve, provided with helical grooves with the outside diameter of the rider. In hard materials and - when frequent assembly and disassembly prove necessary, a plastic bushing will remain permanently mounted by force in a hole with the outside diameter of the rider; It will include the helical grooves intended to receive it.

 In concrete, a drowned insert identical in shape to the rider but tubular is made prisoner at the time of casting and constitutes the tapping intended to receive the corresponding rider later.

Its two orifices communicate with each other so as to allow them to be uncorked using compressed air.

 Figure 1 shows, in elevation the device according to the invention.

 Figure 2 shows, the device according to the invention half mounted in an insert embedded in the concrete.

 The device shown in Figure 1 comprises a bent and twisted metal wire forming an open helical jumper (1) on a helical slot (2) between the helical turns (3) and (4) Doric cylin, concentric and sq-metric according the longitudinal axis common to the constituent parts of the device.

 I1 can be made of a moldable material.

 The device shown in Figure 2, shows the jumper half mounted in the insert embedded (5) in the concrete (6).

 The device according to the invention is more particularly intended for temporary fasteners, fastenings in soft materials, and removable anchors.

Claims (6)

 1) Device for quickly fixing and removing wires, bars, or gratings between themselves or on supports, characterized in that it comprises a helical jumper (1), open on a helical slot (2) comprised between the turns (3 and 4) helical, cylindrical, concentric and symmetrical along the axis common to the component parts of the device.  2) Device according to claim 1 characterized in that the pitch of the turns is left or right.  3) Device according to claim 1 or claim 2 characterized in that the pitch of the propellers is, depending on the diameter of the wire, between 1.5 times and 2 times their outside diameter To provide the largest possible passage through the axis of the device.  4) Device according to any one of the preceding claims <ç) characterized in that a tubular insert 1 of identical shape to the product of the invention can be embedded in a moldable material (6).  5) Device according to any one of the preceding claims, characterized in that the ends of the jumper are rounded or pointed.  6) Device according to any one of the preceding claims, characterized in that it is preferably made of metal.