68 results about "Fall accident" patented technology

Provided is a bathing assistance device for an infant, wherein the infant's resistance due to the strong impact noise generated when using a conventional bathing aid can be eliminated, armrests can operate smoothly, the skin of the infant can be prevented from being caught or compressed in a gap between the upper body and the armrests, by making a play means removable, the infant can replace the play means with his / her preferred safe play means or purchase only the bathing assistance device separately, foreign substances such as washing water and feces which flow into the inside of a tread can be quickly discharged, the bathing assistance device can be easily stored and dried in a bathroom, a falling accident in which the infant slips and falls on an upper portion of a lower body part can be prevented.

The invention relates to the technical field of construction falling monitoring, in particular to an intelligent monitoring and early warning method and system for construction high-altitude falling accidents. Time step-based behavior mode branches are introduced, and regional distribution probabilities of different behavior mode branches are divided; the behavior mode branch comprises a high-altitude operation mode and an edge movement mode; constructing a fusion control vector according to the scene risk vector and the individual deviation vector, calculating a weight vector, and activating a mask to calculate an output channel vector; a fusion feature column vector is established, the falling risk probability is predicted through a full connection layer, whether early warning is triggered or not is judged, if yes, a falling point is calculated according to a free falling body, the rope length is calculated in combination with a safety rope anchor point, whether the impact speed and impact force are calculated or not is judged, the elasticity and damping of a safety rope are introduced to calculate applied force, and a first-order ordinary differential equation set is established; setting displacement and impact speed conditions, and calculating a final falling point by combining the anchor point vector, the displacement and the displacement in the rope direction of the operator.

The present invention discloses a suspension for building construction, which relates to the field of building construction. It includes a hanging basket, and a protection mechanism is arranged on the hanging basket. The protection mechanism includes a triggering mechanism that is triggered when a construction worker falls and emits a signal outward, and a protection structure for providing self-rescue conditions for the construction worker after falling. The triggering mechanism includes a pressure sensor and a signal generator. The protection structure includes a telescopic frame and a climbing frame. The protection mechanism further includes a driving structure for driving the telescopic movement of the telescopic frame. The driving structure includes a first lead screw and a first driving motor, and the first driving motor is electrically connected to the signal generator. By arranging a triggering mechanism and a protection structure on the hanging basket, when a falling accident occurs to a construction worker on the hanging basket, the pressure sensor will be triggered and a signal will be sent through the signal generator to trigger the protection mechanism, so that the telescopic frame extends out, providing self-rescue conditions for the falling construction worker, enabling the construction worker to quickly get out of danger through multiple groups of climbing frames on the telescopic frame.

The invention relates to the technical field of communication towers, one embodiment of the invention provides a communication tower with a hidden climbing structure, the communication tower comprises a communication tower body and further comprises a lifting plate, a supporting plate and a supporting mechanism, the lifting plate is arranged on one side of the communication tower body through a lifting mechanism, the supporting plate is arranged on the lifting plate through a moving mechanism, and the supporting mechanism is arranged on the supporting plate. The supporting mechanism is arranged on one side of the lifting plate, the lifting mechanism comprises a sliding rod, sliding barrels and a driving assembly, the sliding rod is fixedly connected to one side of the communication tower body, the sliding barrels are fixedly connected to the two ends of the lifting plate, the sliding rod is slidably connected into one sliding barrel, and the driving assembly is arranged on one side of the communication tower body. The ladder is used for solving the technical problems that in the prior art, an external ladder directly fixed to a tower easily attracts a child to climb, once the child slips in the climbing process, a high-altitude falling accident is extremely likely to happen, and serious potential safety hazards exist.

The utility model relates to the technical field of roof anti-falling, and provides an anti-falling system for roof construction, which comprises an anti-falling mechanism and a rope mechanism, the anti-falling mechanism comprises locking pliers and a telescopic fixing frame, and the telescopic fixing frame comprises a first mounting column, a second mounting column and a shear fork type assembly. The first mounting column and the second mounting column are both provided with locking pliers, the shear fork type assembly comprises multiple sets of shear forks connected with one another, each set of shear fork comprises a first shear fork arm and a second shear fork arm which are connected in a crossed mode, the first shear fork arm of the shear fork located at the head end is hinged to the first mounting column in a sliding mode, and the second shear fork arm of the shear fork located at the head end is hinged to the first mounting column; the first shear fork arm of the shear fork located at the tail end is hinged to the second mounting column, and the second shear fork arm is slidably hinged to the second mounting column; the rope mechanism is mounted on at least one of the first mounting column and the second mounting column. Therefore, the safety coefficient and the working efficiency of roof operation can be remarkably improved, the risk of high-altitude falling accidents is effectively reduced, and reliable guarantee is provided for high-altitude operation.

The utility model relates to a safe anti-falling intelligent escalator. The safe anti-falling intelligent escalator mainly comprises an elevator body, a base, a lifting guardrail, a first lifting device and a second lifting device. A lifting guardrail is movably arranged on the outer side of the elevator, and the lower end of the lifting guardrail is movably connected with a lifting device. The lifting device comprises a bottom plate, an upper cross support, a top plate, a lower sliding groove above the bottom plate and an upper sliding groove below the top plate, and a connecting shaft is arranged in the middle of the cross support. The lifting guardrail is composed of a guardrail, a left baffle and a right rotating shaft. Fixed handrails are arranged on two sides of the elevator, visual sensors are arranged on inner sides of the handrails, and a plurality of movable pressure sensors are arranged at the upper end of the elevator. According to the intelligent escalator, falling accidents can be effectively prevented through cooperative operation of all the components. The pressure sensor and the visual sensor can monitor in real time, the lifting guardrail and the lifting device provide additional protection, the safety of a user is guaranteed, and the system has the advantages of being reasonable in structure, high in safety, intelligent and the like and is suitable for various places.

To realize a safe suspension device for compact unmanned machine transport that can prevent unintended fall accidents caused by erroneous operations or malfunctions during the time of transporting a cargo using a compact unmanned machine.SOLUTION: A suspension device for compact unmanned machine transport is a device that mediates connection between a compact unmanned machine and a cargo, and is equipped with interlocking lock mechanisms in a threefold structure. Among the lock mechanisms, an upper lock mechanism and a lower lock mechanism perform locking and unlocking in a complementary manner through coordination of two upper and lower lock pins that move in an opposing manner. These operations are linked to a transmitter operation and are intuitive, but unlocking is completed through successive reverse operations that are not performed in normal operations. Therefore, fall accidents caused by erroneous operations or malfunctions not intended by an operator hardly occur. Furthermore, since a load-lock mechanism is activated by a weight of the cargo lifted by the compact unmanned machine to fix the upper lock mechanism, even safer transport work can be performed.SELECTED DRAWING: Figure 3

The invention discloses a high-altitude falling domain knowledge graph construction method and device and a medium, and the method comprises the steps: collecting and integrating a falling protection equipment standard file and a high-altitude falling accident investigation report, and carrying out the preprocessing of data; concepts, attributes and relationships in the knowledge graph are defined, so that the consistency and expandability of data are ensured; manually extracting entity information according to the falling protection equipment standard file; for a high-altitude falling accident survey report, performing entity extraction based on a self-training domain named entity recognition tool, segmenting a text based on a trigger word, extracting phrases based on unsupervised clustering and a large language model, and performing relation extraction based on rules; and according to FPS design requirements, meeting retrieval requirements, including query through an FFH-ARs entity, query through an FPE-S entity and query through a multi-attribute combination. According to the invention, the characteristics and details of each accident can be displayed from multiple angles, the design of a falling protection system is optimized, and the high-altitude operation safety is improved.

The roof fall prevention ladder device (1) of the present invention is composed of a safety rope block (50) having a safety wire (53) connected to a worker who has climbed onto the roof (201) through a fall prevention part (40), and a lower fixing part (30) that is connected to the roof (201) of a building (200) by a rotating structure and is attached to the roof (201) of a building (200) from top to bottom, thereby having the feature of preventing fall accidents caused by roof collapse when working on the roof (201) of a building (200) such as a livestock barn where it is difficult to use an aerial work vehicle.

This invention relates to the field of construction fall monitoring technology, specifically to an intelligent monitoring and early warning method and system for construction high-altitude fall accidents. It introduces time-step-based behavioral pattern branches, dividing the regional distribution probability of different behavioral pattern branches; these branches include high-altitude operation mode and edge movement mode; a fusion control vector is constructed based on the scene risk vector and individual deviation vector, and weight vectors and activation masks are calculated to calculate the output channel vector; a fusion feature column vector is established, and the fall risk probability is predicted through a fully connected layer to determine whether an early warning is triggered. If triggered: the fall point is calculated based on free fall, the rope length is calculated in conjunction with the safety rope anchor point, and it is determined whether to calculate the impact velocity and impact force. The elasticity and damping of the safety rope are introduced to calculate the applied force, and a system of first-order ordinary differential equations is established; displacement and impact velocity conditions are set, and the final fall point is calculated in conjunction with the anchor point vector, displacement, and the worker's rope-direction displacement.

The application discloses a kind of anti-falling climbing iron tower auxiliary tools, it is related to iron tower climbing safety tool field;Maintenance personnel mainly uses anti-falling track to avoid the occurrence of anti-falling accident when climbing high-voltage transmission tower, but anti-falling track is inconvenient to operate, needs matched anti-falling device, and there are simultaneously high installation cost, problem such as invalidation with age, cannot provide convenient and reliable protection for high-altitude worker.The present application comprises the hooking frame of lower end opening, the sealing rod, the slide rail rod, the connecting rod and the handle rod, the sealing rod is rotatably connected to the left side of the lower end opening of hooking frame, the upper end of slide rail rod is connected to the lower end left side of hooking frame, handle rod is slidably matched with slide rail rod, sealing rod, slide rail rod, connecting rod and handle rod form sliding connecting rod mechanism, handle rod is connected safety rope through hanging ring.When falling by accident, sealing rod closes hooking frame, prevent hooking frame from falling off from angle steel, effectively improve the safety of iron tower climbing, simple structure, convenient operation, low manufacturing cost.

Disclosed is a ladder foot slipping prevention device for preventing a fall accident, wherein the device is mounted on a ladder to prevent the foot of a user, using the ladder, from slipping inward from the ladder, and enables the user, using the ladder, to maintain stable foot placement. The ladder foot slipping prevention device for preventing a fall accident comprises: a frame assembly disposed parallel to supports and accommodated between the supports or protruding to the outside of the supports to be disposed in front of the supports; multiple link members, each of which is disposed in the longitudinal direction of the supports, has a portion rotatably coupled to the supports, has the other portion rotatably coupled to the frame assembly, and arranges the frame assembly between the supports or in front of the supports; and multiple auxiliary steps which are coupled to and supported by the frame assembly, and are arranged in the longitudinal direction of the frame assembly.

The utility model discloses a frame type movable safety cable device which is assembled on a main beam and comprises a first frame, a second frame and a movable mother cable assembly. The movable mother rope assembly comprises a steel wire rope, a manual sliding device and a falling protector. The falling protector is mounted on the steel wire rope; the steel wire rope is assembled between the top of the first frame and the top of the second frame through a manual sliding device, the manual sliding device is used for guiding the steel wire rope to move in the direction perpendicular to the main beam, and a tightener is arranged between the manual sliding device and the steel wire rope. By means of the movable mother rope assembly, an operator can obtain reliable safety protection at any time when working aloft, no matter how the working position changes, the safety rope can be adjusted to the proper position only by simply operating the manual sliding device, and falling accidents are effectively prevented. And an operator can freely move in a wider area, so that the operation efficiency and the flexibility are improved.

The utility model relates to a hoisting falling accident simulation device, and belongs to the field of dangerous accident simulation equipment. According to the technical scheme, the lifting appliance comprises a body, a wireless control module and a power source are arranged in the body, a top hook is fixedly arranged on the body and used for being connected with the lifting appliance, a steering engine is further arranged at the lower end of the body, and the wireless control module is electrically connected with the steering engine and used for controlling the steering engine; a first through hole is formed in the first connecting plate, a second through hole is formed in the second connecting plate, one end of the release shaft is connected with the steering engine, the other end of the release shaft can penetrate through the first through hole and the second through hole, and the release shaft is used for limiting and releasing a heavy object. By means of the wireless control module and the steering engine, personnel can remotely control the steering engine to rotate so as to release the heavy object, manual unhooking action is not needed, and the risk that personal safety of operators is injured is reduced.

The invention relates to the technical field of high-altitude operation monitoring, and discloses a high-altitude operation anti-falling safety monitoring method based on data processing. The method comprises the steps of obtaining an environmental parameter set of a target operation area, and performing matching query in a historical accident database to determine a historical falling accident feature set; performing risk grade division on the falling accident feature set to obtain a plurality of graded historical falling accident feature sets, and traversing and extracting an environmental risk factor reference value and a risk influence range parameter; taking the risk influence range parameter as a boundary condition of a dynamic monitoring window, and performing multi-dimensional feature capture on the real-time motion data sequence of the high-altitude operation personnel by utilizing a plurality of configured dynamic monitoring windows to obtain a plurality of real-time motion feature sets; and carrying out space-time correlation fusion on the plurality of real-time motion feature sets to obtain a target space-time fusion motion feature set, and taking the target space-time fusion motion feature set as an anti-falling safety monitoring result. According to the method, environment and motion data are fused, and a precise monitoring basis is provided for high-altitude operation falling prevention.

To provide a system for detecting an aged person, a person in need of nursing care, and a fall accident at a construction site without depending on a cloud, and issuing an alarm in an emergency while giving a psychological sense of security.SOLUTION: The present invention includes a pose estimation means for estimating a skeleton of a person from a camera image in real time and detecting a falling state, a speech synthesis means for speaking in Japanese when a fall is detected, an interaction generation means for recognizing a person's utterance and generating a polite answer using a generative AI model, and an alarm means for sounding a siren when a negative utterance is detected. They operate in a fully local configuration with RaspberryPi5 and Hailo-8L to achieve both privacy protection and low latency. To integrally perform fall detection, psychological care, and alarm issuance, and to exhibit high usefulness in welfare, nursing, and disaster sites.SELECTED DRAWING: Figure 1

The utility model relates to a kind of outdoor elevator anti-falling rain awning convenient to install, belong to elevator technical field, including elevator corridor, the both sides of elevator corridor are provided with multiple canopy board a, the edge side of canopy board a is provided with two canopy board b, the both sides of canopy board a and canopy board b are all opened with several connecting hole positions a, rivet b is inserted in the inside of connecting hole position a, the utility model has the beneficial effect that, between each canopy board, it is fixed between the utility model using drill tail screw with elevator corridor, this connection mode does not need professional welding skill, reduce the requirement to the technical level of construction personnel, reduce the dangerous coefficient of high-altitude work, avoid the falling accident caused by welding failure, simultaneously, modular structure makes installation process more simple and efficient, can greatly shorten installation time, reduce construction cycle, reduce the influence of weather and other external factors on installation progress.

The invention discloses a vehicle falling detection method and system, electronic equipment and a storage medium. The method comprises the steps that acceleration data are collected in real time in the riding process; sliding the sliding window to obtain acceleration data; calculating a maximum acceleration module value accmax and an acceleration median error accstd within a first set duration before the window is slid; the z-axis acceleration mean value acczm and the two-norm accxy of the acceleration component of the xy plane of the sliding window within the last second set duration are calculated; if accmax is larger than or equal to a set threshold value, or acczm is smaller than or equal to a first threshold value, accxy is larger than or equal to a second threshold value, and accstd is larger than a third threshold value; and if so, judging the vehicle falling state. According to the method, whether the vehicle is in the falling state is judged through the acceleration data, the falling state is accurately judged, falling accidents do not need to be reproduced, safety is high, data cost is low, and the technical problem that in the prior art, falling detection safety is poor is solved.

The utility model belongs to the technical field of electric cover plates, and discloses an anti-falling electric cover plate for a hoisting hole of a wind generating set, which comprises a cabin platform bottom plate, a cabin cover bottom plate, a hinge and a positioning mechanism, two sets of grooves are formed in the upper surface of the cabin platform bottom plate, two sets of first anti-falling cover plates are slidably connected into the two sets of grooves of the two sets of cabin platform bottom plates, and a limiting mechanism for limiting the moving range of workers in the wind generating set is arranged on the upper surface of the cabin platform bottom plate. The two sets of safety rope hooks are adjusted and moved to trigger the second anti-falling cover plate to be disconnected from the interior of a groove of the cabin cover bottom plate, so that the second anti-falling cover plate can be rotationally opened only when follow-up workers insert the two sets of safety rope hooks into the limiting mechanism. Therefore, falling accidents of people caused by the fact that people do not wear safety belts or hang double hooks are avoided as much as possible.

The present invention relates to a high-rise escape system and a method for using the same, comprising a movable window located at a window; the movable window comprises a window frame, a fixed window, and a railing; a pedal is stored inside the railing and can be unfolded under the action of an activation mechanism; the fixed window and railing are combined to form a car with an inner opening; in the ordinary window form, the fixed window is on the same plane as the wall inside the window; in the car form, a user can enter the movable window; and under the action of a lifting assembly, the user moves away from the window with the movable window, away from dangerous housing spaces. Compared with the prior art, the present invention has the beneficial effect of transforming and utilizing ordinary windows by storing and folding them, so that the ordinary window and the escape device are combined together, which does not affect the aesthetics of the window and prevents high-altitude falling accidents, while also being able to carry multiple people to escape safely from a high-rise building to the ground at the same time.

The utility model relates to the technical field of high-altitude operation, and discloses a steel cable inclination anti-falling device, which comprises a fixed bracket, a steel cable inclination anti-falling device and a steel cable inclination anti-falling device, the steel rope is made of a high-strength material, is fixed on the fixed bracket and extends along the stair handrail; and the braking mechanism is connected to the steel rope in a sliding manner. According to the steel cable inclination anti-falling device, by designing the fixing support with an adjustable buckle structure, the device can adapt to stair handrails of different sizes and is fixed through bolts, the universality and installation convenience of the device are greatly improved, a mechanical inertial sensor is adopted as a triggering assembly, the falling acceleration can be monitored in real time, and once an abnormal condition is detected, the device is prevented from falling off. When the steel cable breaks down, a friction plate in the locking assembly is immediately triggered to make contact with the steel cable for braking, falling accidents are effectively prevented, meanwhile, an anti-skid coating is arranged on the surface of the steel cable, the locking assembly comprises a groove structure matched with the steel cable, friction force during braking is further enhanced, and the braking effect is improved.

The invention discloses an elevator anti-falling protection device and an anti-falling protection method, and relates to the technical field of elevator installation protection devices. An elevator anti-falling protection device is applied to a speed limiter which is applied to an elevator. The elevator comprises a lift car, a guide rail, a traction machine and a control module. An elevator anti-falling protection device comprises a steel wire rope locking mechanism. The steel wire rope locking mechanism comprises a hook plate, a connecting rod, a spring, a locking block and a heavy hammer. An elevator anti-falling protection method is applied to an elevator anti-falling protection device and comprises triple protection mechanisms. The anti-falling device has the advantages that on the premise that the safety protection function provided by the speed governor is eliminated, a triple anti-falling protection mechanism is additionally provided, the elevator falling accident is avoided to the maximum extent, although the anti-falling device is installed on the speed governor, the anti-falling device is not associated with a transmission part in the speed governor, and the anti-falling device is not prone to falling. In the action process, a transmission part in the speed governor does not need to participate, and the operation reliability of the speed governor is improved to a great extent.

The present invention provides a worker fall prevention system and method capable of reliably preventing a fall accident of a worker working in a high-place work area.　This worker fall prevention system in a high-place work area is configured such that a worker wearing a lanyard performs work while moving as appropriate between a safety area and one or more work areas. The worker fall prevention system is configured such that the worker working in the high-place work area is restricted from operating a hook of the lanyard on their own will, and the worker cannot arbitrarily operate the hook unless given permission by a supervisor on site.

The utility model relates to the technical field of clothes, in particular to multifunctional integrated intelligent anti-falling clothes which comprise a clothes body, and safety air bags are arranged on a neckline and a waist of the clothes body respectively. Compared with the prior art, the device has the advantages that the nine-axis sensor is used for measuring inertia force generated by movement of a human body, the safety air bag can be quickly bounced off after the falling behavior is detected, the safety air bag is used for protecting an old person, the contact area between the body of the old person and the ground is increased, and the safety of the old person is improved. By arranging a health detection arm ring, real-time heart rate monitoring, blood oxygen monitoring and body temperature monitoring services are provided for the elderly, and by arranging an intelligent button, four functions of positioning, emergency calling, daily reminding and fast picture transmission can be achieved, so that the elderly can master position information of the elderly in time, and the elderly can be prevented from being damaged. The elderly can be helped to go out more safely, take medicine reasonably in time and have meals on time, and children can conveniently care the elderly.

The utility model relates to a windproof anti-falling limiting hoisting guide rope mechanism which comprises a sling, the upper end of the sling is used for being connected with a lifting mechanism, the lower end of the sling is used for being connected with a curtain wall, the windproof anti-falling limiting hoisting guide rope mechanism comprises a limiting plate and guide ropes located on one side or two sides of the sling, the upper ends of the guide ropes are fixed to the top end of a building, and the lower ends of the guide ropes are fixed to the ground. The sling is fixedly connected with the limiting plate, a guide hole is formed in the limiting plate, and the guide rope penetrates through the guide hole in the limiting plate; on the basis of an existing universal walking mechanism, the C-shaped protection plate is additionally arranged through the bolt, the walking mechanism can be hung on the upper wing plate of the I-shaped steel no matter a pulley shaft is broken or the lower wing plate of the I-shaped steel is broken, and the anti-falling protection effect is achieved; the curtain wall module has the advantages that the guide rope and the limiting plate are arranged to serve as a rail for up-down limiting, and shaking of the curtain wall module caused by strong wind can be prevented; meanwhile, the falling protector is arranged, so that when the sling is broken or loosened, the main sling can be clamped by the falling protector, and falling accidents are avoided.

The invention relates to the technical field of building construction, and particularly discloses a detachable roof protective vertical rod which comprises a base, a protective rod assembly is inserted into an inner cavity of the base, anti-collision assemblies are arranged on the outer surfaces of the two sides of the base, and second connecting blocks are arranged on the outer surfaces of the protective rod assembly. By means of the protection rod assembly, an alarm can be given out in time in the climbing process of other people, a worker can conveniently stop dangerous behaviors in time, alarm sound can rapidly attract attention of a climber and surrounding people, the climber stops when aware of the dangerous behaviors of the climber, falling casualty accidents caused by climbing slipping are avoided, and the safety of the worker is improved. The anti-collision assembly can effectively absorb and disperse impact force generated by collision when equipment moves and collides with the protective vertical rod, the vertical rod is prevented from being damaged and deformed due to direct collision, it is ensured that the vertical rod is always kept in a stable protective state, reliable safety guarantee is continuously provided for operators, and the working efficiency is improved. The trouble and the cost of frequent replacement due to the damage of the vertical rod can be reduced, and the construction efficiency is improved.

The utility model relates to an air cylinder protection device which comprises a protection cover arranged around a switch assembly of an air cylinder, and a plurality of installation holes corresponding to connecting holes in the air cylinder are formed in the side wall of the protection cover. And the locking piece penetrates through the mounting hole to be matched with the connecting hole, and the locking piece is used for locking and connecting the protective cover and the air cylinder. The protective cover is arranged around the switch assembly of the air cylinder, collision and falling accidents of the switch assembly are avoided, damage of welding slag splashing to the switch assembly in the welding process is reduced, equipment faults caused by damage of the switch assembly are reduced, the equipment fault rate and maintenance and replacement cost are reduced, and production efficiency is effectively guaranteed.

The invention discloses a water turbine set volute water pipe operation safety protection device, and relates to the technical field of water turbine maintenance, and the water turbine set volute water pipe operation safety protection device comprises a protection unit which comprises a protection jacket, a safety belt arranged on the protection jacket, and a fixing button arranged on the safety belt; the electronic induction unit comprises a detection assembly arranged on the protective jacket. By instantly detecting falling, automatically triggering a powerful magnetic attraction mechanism, providing manual standby operation and being easy to recycle for next use, the operation safety is remarkably improved, the risk of high-altitude falling accidents is reduced, and the system is simple in structure, easy to operate, suitable for various high-altitude operation scenes and high in practicability. The practicability and the adaptability are further improved, so that the personal safety of overhaul and maintenance personnel is guaranteed, the safety protection level of high-altitude operation near the edge is improved, and casualties and accidents can be completely eradicated.

The utility model provides a construction hoist anti -fall protection device relates to hoist protection device technical field, include: hoist body, in the utility model, first, the protection component is located hoist body near the one side of top, and the limit seat is fixed in hoist body top one side, and the support frame is linked to the limit seat through fixed connection, and the transmission motor is installed on the support frame, and its output fixed connection rotating block, when transmission motor starts, and the rotating block drives the movement of its moving block, and the moving block is linked to the moving seat through sliding connection, and the top fixed connection of moving seat has the connecting block, and the guardrail is installed on the connecting block, and the guardrail is fixedly connected with the limiting block, can play the limiting and protection effect through the guardrail, thereby can height adjustment according to the demand of guardrail, satisfy the demand of different staff height, prevent the staff from falling accident when working on hoist body.