27results about How to "Prevent retraction" patented technology

This utility model discloses a safety protection device for power facilities at power construction sites, belonging to the field of power construction safety protection technology. Its key technical features include a protective mesh frame, with bases fixedly connected to the front and rear sides of the top of the frame. By setting a positioning component, with T-blocks and T-slots cooperating, the sliding direction of the extended mesh plate within the protective mesh frame is restricted, ensuring stable extension and retraction. An adjusting groove, sliding screw, and hand-tightening nut cooperate; after the extended mesh plate is stretched to a suitable length, rotating the hand-tightening nut on the outside of the sliding screw locks the extended mesh plate inside the protective mesh frame, preventing it from sliding or retracting arbitrarily during handling and use. This ensures the stability of the extended length of the protective device, providing a reliable protection range for the construction site and enhancing safety performance. Simultaneously, auxiliary wheels at the bottom of the extended mesh plate contact the ground to facilitate sliding within the protective mesh frame, making operation easier and more convenient.

The utility model relates to the field of draw-bar box discloses an anti -toppling draw -bar box, including two containing groove, two containing groove set up respectively on the two bottom plate of draw -bar box body, the inner wall of containing groove is fixed with the limit post, the outer wall of limit post is fixed with the limit block, the inner wall of containing groove is connected with the L -shaped board sliding, the L -shaped board is opened with the limit slot, the limit post is inserted in the limit slot, the top surface of L -shaped board is opened with the limit hole, the limit hole is linked with the limit slot, the limit block is connected with the limit hole sliding, two tension springs are fixed on the L -shaped board, the other end of tension spring is fixed with the inner wall of containing groove. In the utility model, through the cooperation of limit post, limit block, L -shaped board and gyro wheel, can increase the support area of draw -bar box body bottom plate, make draw -bar box body be in the standing state more stable, effectively prevent the phenomenon that draw -bar box body appears when being collided by external force and falls.

The application provides a double-head bending type fastening clamp for a stand and a wallboard and a plate-column connecting structure. The double-head bending type fastening clamp comprises a main body part with a first end and a second end opposite along the length direction; a pressing bending part is formed by bending the first end of the main body part, comprising a first elastic arm and a second elastic arm, the connection part of the first elastic arm and the second elastic arm is arranged at an angle and forms a protruding abutting part, the other end of the second elastic arm is a movable end, and the movable end abuts or is slidably supported on the main body part; a clamping bending part is formed by bending the second end of the main body part, and the clamping bending part has a clamping groove for clamping the side wall of the stand; a limiting protruding part is formed on the main body part and located between the second elastic arm and the second end. The double-head bending type fastening clamp has simple structure, fast installation, convenient disassembly and reliable fixation. The plate-column connecting structure has simple overall structure, and the connection is completed by only clamping the side wall of the stand by the fastening clamp and elastically pressing the wallboard by the abutting part, so that the construction efficiency is high.