SU69837A1 - Wire strainer - Google Patents

Description

The invention relates to a device for tensioning wire reinforcement in the manufacture of reinforced concrete products, in which tensioning devices are applied for each wire separately, connected to the corresponding wires by means of clamps.

A distinctive feature of the device is that, in order to service several stands (forms), the tensioning device is made moving across the ends of these stands, and each of the latter is provided for temporarily securing the ends of the wire with fixed clamps located between the rails or guides devices.

FIG. 1 shows a general view of the stand (form) and tension device; FIG. 2 is a view according to AB in FIG. one; FIG. 3 is a view of the tension device along the facade (left view in Fig. 1).

The device consists of stands (forms) on which the longitudinal reinforcement of products is tensioned, and a tension device serving a number of stands.

The stand (form) consists of a stationary part 1 and a carriage 2. A clamping device (the same for a stationary part and a carriage) consists of frames 3 made of sheet steel inserted between the bar bars and fixed wedges 5. Within the framework of the rollers 4 freely rotate The reinforcement wires surround the rollers and enter the wedge clamps 6, in which their ends are fixed.

The wire is refilled as follows. The wires, unwound from the coils (not shown), are passed through the ABC line into the holes of the combs 7 and 8. At this time, the cart 2 is located near the stationary part of the stand-wire, then the wires are passed through the holes in the 5 and / O combs and clamped then the carriage 2 is rolled back to the required distance manually, by means of a mechanical winch or by means of a motor and a gearbox mounted directly on the carriage itself.

At the end of the stroke, the insert 11 welded to the trolley enters between the stops 12, fastened to the foundation

copy, where it is fixed by wedges 13.

After that, the wires at the fixed part of the stand are cut off (approximately between these points), their ends are led around the rollers 4, pass through the wedge clamps 6 and are passed into the wedge clamps 14 of the tensioning device, where they are fixed.

The tensioning device is movable and mounted on the trolley 36. All clips 14 are suspended on cables 15, which go around rollers 16 and attached to movable holders of the polyspasts 17. Free ends of the polyspast cables, curving rollers 18, are wound on the drum 19, driven by gears 20, 21, 22, 23, 24, 25. The gear 25 sits on the motor shaft (not shown).

When the motor is turned on, the slack wire is first selected, then the wire begins to be pulled, continuing until the tension of the wire is equal to half the weight of the load 26, after which the load begins to rise and the increase in wire tension stops. When the load is lifted, contact 27 closes, and in the box 28 a light bulb comes on, corresponding to this wire. (If one clamp or another does not tighten properly, then the corresponding load will not rise, and the light will not come on). Gradually all weights will rise, and all wires will be stretched exactly the same. After that, the wedge clamps 6 are tightened with a hammer, and the clamps M are released and the wires are pulled out of them. The weights 26 are inlaid, which allows easy adjustment of the desired wire tension.

Following this, the tensioner on the rails 29 rolls over to the next row of wires. For

Tightening this row requires first of all to lower the clamps J4. To do this, lift the lever of the band brake 30 and apply this movement to the button. Then, through the gears 32, the drum 33 is set in motion, and the cable passed through block 35 pushes the front block of the chain hoist 17 upwards, simultaneously lowering the clamps J4. Rollers 35 are seated on levers 34 to compensate for discontinuity in the tension of the cables. The purpose of the brake 30 is to prevent a sharp drop in the load 26.

Two people with no specific qualifications are required to maintain the device.

Since the location of the wires depends on the configuration of the dies, it is quite possible to use the proposed machine for producing tightly reinforced pipes by adding rollers to turn the wires from horizontal to vertical position and arrange them around the ring.

Subject invention

A device for tensioning wire reinforcement in the manufacture of reinforced concrete products in which tension devices are used, nor for each wire separately. Connected to the corresponding wires by means of clamps, characterized in that in order to service several stands (forms) the tension device is made moving across the ends of these stands, and each of the latter is provided for temporarily fixing the ends of the wire with fixed clamps located between the rails or rails for izheni tensioner.

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