SU114030A1 - Device for the manufacture of tension-reinforced concrete products on stands - Google Patents

Description

Devices are known for producing tension-reinforced reinforced concrete products (such as slab-grades) in bottomless molds with compaction of concrete by means of vibrating inserts and vibration shields, with the transfer of the tension of the reinforcement to the stops anchored to the floor of the stand.

The fabrication of stress-reinforced concrete products using these devices is carried out in the following order. Rebar is tensioned and fastened with clamps in the stops; A bottomless mold is installed on the floor of the stand, then vibrating inserts are inserted, a stiff concrete mix is poured and vibrated; a vibration shield is placed on top, which produces additional compaction of the concrete and leveling the upper edge of the product. In some cases, a vibration load is used. After compacting the concrete, the inserts are removed, the vibration shield is lifted and the mold is removed. A disadvantage of the known devices for the manufacture of reinforced reinforced concrete products in the bench method is the difficulty of using the stand for a wide range of products with a different arrangement of reinforcement in connection with the mill, with the ionization of the stops for fixing the grippers of the reinforcement. In addition, in such devices, damage to the product during removal of the mold is even the case if it is slightly skewed.

In the proposed device, these drawbacks are eliminated. Instead of an emphasis locked in the floor of the stand, the proposed device uses an easily removable portable group stop designed to absorb forces from several reinforcing rods, transmitting force to the concrete base of the stand and held from tipping over by spacers resting against a rail track, for example , concrete stacker. At the same time, the spacers perceive the forces that are significantly smaller than the total force from tension of several reinforcement bars. The reduction of the force on the spacers is achieved by the fact that the distance from the surface of the stand base, which is the bottom of the form, to the axis of the spacer is assumed to be large compared with the distance from the same

No. 114030-2 -: surfaces to the axis of the reinforcement. Such a portable design of the stops allows, by replacing or rearranging them, to expand the possibilities of using the stand and to apply it to different types of products and different arrangement of reinforcement. In order to eliminate damage to the molded products due to the resulting distortions of the forms at the time of their ascent, it is envisaged to install the vibration shield inside the sides of the mold on the upper plane of the product, so that, when the mold is removed from the product, the vibration shield remains stationary while pressing the article. In this case, the separation of the form from the product is carried out by means of an emphasis on the floor of the stand of levers, hinged on the sides of the form and suspended by opposite ends to the clamping frame.

The drawing shows a stand with the proposed devices in two projections.

When forming reinforced reinforced concrete products on the stand, for example, hollow-core slabs, to the side walls of the concrete floor of the stand / move the portable group stops to fix the tension reinforcement, which are a welded assembly consisting of an anvil plate of the channel 2, two struts 3, abutting against the rail 4, and several socket sleeves 5 for grippers 6. The distance between the axes 7 of the sleeves 5 corresponds to the size between the reinforcing bars in the product.

After tensioning the reinforcement and fixing it in stops, form 8 is installed on the floor of the stand, into which the concrete mix is poured.

Next, vibroplate 9 is lowered onto the form and clamped with a clamping frame 10, fitted with hooks //, which serve to lift the mold when they are connected to the levers 12.

After the concrete has been compacted, the clamping frame is lifted by a lifting device and the hook // is hooked onto the ends of the levers 12, which have the ability to pivot about the axes 13.

When the clamping frame is further raised, the opposite ends of the levers 12 abut against the floor of the stand and remove the form 8 from the product, pressed against the vibration shield m 9, preventing the possibility of breaking the corners and edges of the product with the walls of the form. After removing the vibration shield, the next product is molded.

Subject invention

Claims (2)

1. A device for the manufacture of tension-reinforced, concrete products on stands, consisting of stops for fixing reinforcement, form and vibration protection with a clamping frame, distinguished by the fact that, with the goal of making it possible to form different sizes of plate products and maneuvering the arrangement of reinforcing rods, the stops are made in the form of base plates with spacers and are portable - each for a group of reinforcing rods, and to eliminate the possibility of damage to the freshly formed product when it is released from we (boards) the latter is provided with scharnirno-fixed thereto levers upirayuschimis a floor stand and filmed with the shape of the article, the covering vibroschitom, when the presser lifting frame connected to the arms nosredstvom hooks. 2. The form of the device according to claim 1, characterized in that the group stop plate with the clamps fixed on its upper part is freely supported in the sidewall of the stand base and in the lower part is provided with spacers abutting the rail of the concrete way preventing tipping of the plate under the influence of force tensioning the reinforcement, whereby as a result of the difference in the shoulders of the moments of active and reactive forces, only part of the tension is transmitted to the struts.