60results about How to "Prevent jumping over" patented technology

The invention discloses an isolating net piece and a carrier vehicle for loading the isolating net pieces. The isolating net piece comprises an isolating net piece body, a support and an isolating barrier, wherein the isolating net piece body comprises a framework and a net piece arranged on the framework, the support comprises a regulating lever and regulating lever landing legs, is arranged at one side of the isolating net piece body, and is used for supporting the obliquely placed isolating net piece body and regulating the length of the regulating lever according to needs, and the isolating barrier inclining towards the same side is formed by serially connecting a plurality of isolating net piece bodies. The compartment body of the carrier vehicle is formed by a plurality of tank bodies, one isolating net piece is placed in each tank body, the isolating barrier formed by serially connecting the isolating net piece bodies is not easy to damage or incline, can prevent people from climbing and crossing and has a very good blocking effect, handling of the isolating net pieces is convenient and labor-saving, and since the carrier vehicle for loading the isolating net pieces is specially designed, loading of the isolating net pieces is fast, and the transportation process is safe and reliable.

The invention discloses an anti-crossing guard bar. The anti-crossing guard bar includes a vertical column and a base connected with the lower end of the vertical column in a sleeving mode. The lowerend of the vertical column is provided with a limited bulge. The upper end of the vertical column is provided with a top cover. The vertical column is provided with at least three main positioning holes. Each main positioning hole is internally connected with a positioning column used for limiting sliding down of the vertical column in an inserted mode. The vertical column is provided with at least two circular grooves. According to the anti-crossing guard bar, through rotatable vice handrails, a cross-over person is prevented from finding force bearing points, and meanwhile, the difficulty that the cross-over person makes contact with the opposite ground is increased; furthermore, the multiple sets of vice handrails can also be arranged in a staggered mode to prevent person from drillingin through a gap. Each element forming the handrails can be disassembled freely, so that packing and conveying are convenient. The vice handrails can further be fixed directly through a limiting device; troubles of single installing are avoided; and the connecting seat can be wholly disassembled to make the vertical column to retract back to the ground, so that temporary opening requirements are met rapidly.

The invention discloses a compound guardrail with a protective function. The compound guardrail comprises five outer pipes, inner pipes are movably arranged on the upper surfaces of the outer pipes inan inserting mode, threads are arranged on the side faces of the inner pipes, and the inner pipes are connected with fixed nuts in a threaded mode through the threads. The lower surfaces of the fixednuts are in contact with the upper surfaces of the outer pipes, the lower ends of the side faces of every two adjacent outer pipes are fixedly connected through a first cross rod, the upper ends of the side faces of every two adjacent outer pipes are fixedly connected through a second cross rod, the upper ends of the side faces of every two adjacent inner pipes are fixedly connected through a third cross rod, and connecting rods are arranged on the side faces of the outer pipes at the left and right ends. Moving seats are arranged at the ends, away from the outer pipes, of the connecting rods, and cone parts are movably arranged at the lower ends of the outer pipes in an inserting mode. The compound guardrail with the protective function is simple in structure and capable of moving, the height can be adjusted, fixing is convenient, the stability is good, guardrails can be prevented from falling, the protective function is achieved, the use is convenient, and the practicability is high.

The invention discloses a face swing type speed-through door with good blocking effect, which relates to the technical field of speed-through doors; Pedestrian passage; the swing-type door leaf assembly includes a base, a rotating shaft, a door leaf, and a rotating motor, and the swing-type door leaf assembly also includes a blocking rod that is rotatably connected to the upper end of the rotating shaft to prevent the passing of advancing pedestrians, and is used to prevent the blocking rod from passing through. A locking mechanism that rotates toward the exit side of the pedestrian passage, and a second locking mechanism that locks the rotating shaft when the blocking rod rotates toward the entrance side of the pedestrian passage; the door leaf and the blocking rod form an isosceles triangle structure , the door leaf is the waist of the above-mentioned isosceles triangle, and the blocking rod is the bottom of the above-mentioned isosceles triangle; the door leaf is located on the side of the blocking rod close to the exit of the pedestrian passage; the blocking rod is located at the entrance of the pedestrian passage. The invention has good blocking effect.

The invention discloses a bridge cast-in-place concrete anti-collision guardrail formwork construction device and a construction method. The bridge cast-in-place concrete anti-collision guardrail formwork construction device comprises an outer form, an inner form, outer form jacking supports and inner form jacking supports, wherein the outer form is fixed on the outer form jacking supports and canmove up and down along with the outer form jacking supports, the inner form is fixed on the inner form jacking supports and can move up and down along with the inner form jacking supports, the bottomof the inner form and the bottom of the outer form are fixed through opposite-pulling screw rods, the upper end of the inner form and the upper end of the outer form are fixed through pull rods, longitudinal beams are fixed above the inner form jacking supports, transverse beams are fixed to the top ends of the longitudinal beams and extend above the outer form, holes are formed in the transversebeams so as to install limiting pins, the lower ends of the limiting pins are connected with the upper end of the outer form through bolts, and no relative displacement exists in the moving processesof the inner form and the outer form through the limiting pins. According to the bridge cast-in-place concrete anti-collision guardrail formwork construction device and the construction method, the operation is simple and convenient, cooperation of other machinery is not needed, pin shafts between all sections of forms are pulled out, and the jacking supports are used for jacking the forms, the forms can be manually pushed on the inner side of a guardrail, the forms can be moved to the next span of construction, safety and reliability are achieved, and the construction efficiency is high.