3148results about How to "Smooth lift" patented technology

The invention discloses a hermetia illucens breeding system and belongs to the technical field of green cultivation. The hermetia illucens breeding system comprises a culture pond and a ceiling arranged at the upper part of the culture pond; the culture pond is sequentially provided with a water absorption layer, a heating device and a grid layer from bottom to top; the heating device comprises a heating tape and a fixing frame for fixing the heating tape; a compost is put on the upper part of the water absorption layer; the heating device is located in the compost; the grid layer is located on a surface layer of the compost; a lifting device is arranged on the side of the culture pond; the lifting device drives the heating device to lift; and a heat preservation cover is arranged at the top of the culture pond. Hermetia illucens is bred by using the hermetia illucens breeding system, so that the survival rate of hermetia illucens larvae is high and the hermetia illucens is not affected by an external environment; furthermore, the hermetia illucens is easily separated from the compost and insect feces do not need to be cleaned, so that the cost of manpower and material resources is greatly reduced. In addition, the compost in the culture pond is digested and fermented in the hermetia illucens breeding process and can be directly returned to the field as an organic fertilizer, so that the hermetia illucens breeding system is economical and environmentally friendly.

The invention relates to an elevating cabinet, which comprises a safe case body of which the top is provided with an upper opening, wherein an elevating showing platform and a driving structure are arranged in the safe case body; and the elevating showing platform comprises a chassis, a top cover and an upright post. The elevating cabinet is characterized in that the driving structure comprises two front lower fixed pulleys, two rear lower fixed pulleys, two front upper fixed pulleys and two rear upper fixed pulleys; a rotating shaft is limited on the bottom inside the safe case body and can rotate with the axis of the rotating shaft; a front rope radially passes through the front part of the rotating shaft and two left and right free ends of the front rope are connected with the front part of the chassis; a rear rope radially passes through the rear part of the rotating shaft and two left and right free ends of the rear rope are connected with the rear part of the chassis; the inner wall opposite the upper opening is provided with a latch hole; a lower latching structure is arranged in the chassis; and an upper latching structure is arranged in the top cover. The elevating cabinet has novel and simple structure, can enable the showing platform to elevate stably and provides possibility for realizing electric operation.

A fully-automatic bagged cement loader comprises a guide rail, a horizontal conveying device, a traveling device, an oblique conveying device, a positioning system and a controller, wherein the input end of the oblique conveying device is in butt joint with the output end of the horizontal conveying device, and the output end of the oblique conveying device is in butt joint with a loading and stacking main machine which is arranged on the traveling device through a lifting device in a hoisted mode; the loading and stacking main machine comprises a distributing device, a bag unloading device, a stacking device and a support, the distributing device, the bag unloading device and the stacking device are sequentially installed on the support, the input end of the distributing device is in butt joint with the output end of the oblique conveying device, the number of the output ends of the distributing device is at least two, each output end of the distributing device is in horizontal butt joint with one input end of the bag unloading device, each output end of the bag unloading device is in vertical butt joint with one input end of the stacking device, each output end of the stacking device conveys bagged cement to a specific position, and all the cement bags conveyed to specific positions by the stacking device are arranged into a line in the horizontal direction.

The elevated net cage consists of net cage and inflating and deflating elevator, and the inflating and deflating elevator is one sink-float barrel below the net cage and connected to the net cage via rope or linking rod. The sink-float barrel includes an upper sealed cavity, a lower inflating cavity with bottom opening, an air inflating pipe through the sealed cavity and with one end communicated to the inflating cavity and the other end connected to a float body, and the sink-float barrel is connected via rope to a weight. The inflating and deflating elevator has control system comprising terminal control box, air inlet and outlet valves in air pipe, compressed air cylinder or air compressor, with the air outlet valve being a remote controlled one. The elevated net cage may ascend and descend smoothly and reliably and may be remote controlled.

The invention discloses a lifting-type display cabinet, which comprises a cabinet body, wherein a first motor is arranged on a base plate in the cabinet body; a vertical first threaded rod is connected to a driving shaft of the first motor; a movable block is connected to the first threaded rod by virtue of a screw thread; vertical connecting rods are fixedly connected to four corners of the upperend of the movable block; a driving box is fixedly connected to the upper ends of the connecting rods; a horizontal display platform is fixedly connected to the upper end of the driving box; a secondmotor is arranged in the driving box; a driving shaft of the second motor runs through an opening in the display platform and is fixedly connected to a rotary disc; the display platform is of a square structure; sliding mechanism are fixedly connected to four sidewalls of the display platform; the sliding mechanisms are in sliding connection to sliding grooves in the inner sidewalls of the cabinet body; and a glass shield is connected to the upper end of the display platform. With the application of the lifting-type display cabinet provided by the invention, stable lifting of displayed articles is guaranteed, and meanwhile, artistic works can be displayed in all directions, so that the practicability of the display cabinet is improved.

The invention provides a wheel-track combined wheelchair capable of climbing stairs. The wheel-track combined wheelchair capable of climbing the stairs comprises a seat, tracks, a wheel set, two direct current motors, a seat leveling mechanism, wheel-track switching devices, a wheel-track hybrid power case, a manual and electric track switching mechanism, a control system and the like. The wheel-track switching devices are arranged on the two sides of the wheelchair, each wheel-track switching device is composed of a hand-cranking worm, a worm gear, a screw and a rocker, and a front wheel and a rear wheel are fixed on the two rockers respectively. The seat leveling mechanism is composed of a worm gear, a worm and a screw. The wheel-track hybrid power case internally comprises a track drive mechanism, a wheel type combined drive mechanism, a wheel-track power switching device and a pusher. A small motor drives gears and racks, and manual and electric switching of the tracks is achieved. According to the wheel-track combined wheelchair capable of climbing the stairs, switching of two walking modes through the wheels and the tracks can be achieved conveniently, track-type movement and wheel-type movement both can adopt motor drive and manual drive, and various requirements can be met.

The invention relates to a spiral jacking platform, which comprises a speed reduction motor with double output shafts, transmission gear mechanisms, lead screw lifters and an upper platform. The four lead screw lifters are distributed like a rectangle, and the four corners of the upper platform are correspondingly connected and fixed with the upper ends of the four lead screw lifters; the speed reduction motor with the double output shafts is arranged at the center of the four lead screw lifters; the speed reduction motor with the double output shafts is mounted on a motor base which is fixed on a lower frame; and the two transmission gear mechanisms are arranged on two sides of the speed reduction motor with the double output shafts, each transmission gear mechanism is provided with a transmission input shaft and two transmission output shafts, the transmission input shafts of the transmission gear mechanisms correspond to the output shafts of the speed reduction motor with the double output shafts and are connected with the output shafts of the speed reduction motor with the double output shafts through couplers, and two output shafts of the transmission gear mechanism correspond to power input shafts of the two lead screw lifters and are connected with the power input shafts of the two lead screw lifters through couplers. The spiral jacking platform has a simple, ingenious and reasonable structure, can ensure the stability and reliability of transshipment of the vehicle body, and has good synchronism.

A carton has a lifting panel, at least one alternate lifting panel, side, front and rear panels that collectively define an interior space for receiving a heavy weight of non-reel coil of filamentary material or coil products such as wire. The panels may include three hand holes, two of which are reinforced by two adapters insertable into the interior space. One form of adapter is assembled from a blank of foldable material and has top, front, bottom and back walls reinforced by gusset plates which are located remotely from the side edges of the top and bottom walls. The maximum width of the adapter top and bottom walls is less than the distance between opposed side panels of the carton. First and second retention members are formed in the panels and extend into the interior space of the carton where they are engageable with the adapters to support them adjacent a hand hole.

The invention relates to an ecological culture net cage capable of automatically sinking and floating to keep balance and relates to a culture net cage in the field of seawater culture equipment. The ecological culture net cage comprises a net cage frame which consists of buoyancy vertical pipes, top connecting pipes, bottom upper connecting pipes, bottom lower connecting pipes, internal tie bar pipes and ground anchors; a net cage sinking and floating system which consists of communicated air pipes, a head air pipe, air inlets / outlets and water inlets / outlets; and a net which consists of a top net, a bottom net, side nets and net ribs. The sinking and floating system is an automatic-balanced net cage sinking and floating system consisting of the buoyancy vertical pipes and air inlet / outlet valves and water inlet / outlet valves in the buoyancy vertical pipes, can realize the automatic-balanced sinking and floating of the net cage, is stable to be lifted up and lowered down and can prevent the net cage from getting turned upside down during sinking and floating. Since sea cucumber anti-wind and anti-wave adhering bases are arranged in the net, when heavy-wind and heavy-wave ocean currents are encountered, sea cucumbers can enter the adhering bases for inhabitation. Since a dual-layer net with a black inner layer and a light green outer layer is arranged and the internal part of the net is dark green, the net is particularly suitable for the growth habit of the sea cucumbers. The net cage has the advantages that the cultured sea cucumbers grow vigorously, the yield is high, the economic income of fishermen is good and the social benefit is remarkable.

The invention discloses a lifting platform, comprising a supporting frame, a transmission mechanism, a sliding mechanism and a lifting bracket. The transmission mechanism comprises a first transmission assembly, a second transmission assembly, a fixed seat and a transmission shaft, wherein the fixed seat is arranged on the supporting frame, and the transmission shaft penetrates through the fixed seat and the two ends of the transmission shaft are respectively and fixedly connected with the first and second transmission assemblies; the first transmission assembly comprises a handle, a worm and a worm wheel, wherein the handle penetrates through the supporting frame and is pivoted with the supporting frame, the worm is fixedly connected with one end of the handle, and the worm wheel is fixedly connected with one end of the transmission shaft and is engaged with the worm; the second transmission assembly comprises a rack and a gear, wherein the rack is vertically arranged on the lifting bracket, and the gear is fixedly connected with the other end of the transmission shaft and is engaged with the rack; and the sliding mechanism comprises a guide rail and a sliding block, wherein the guide rail is arranged on the supporting frame and is parallel with the rack, and the sliding block is arranged on the lifting bracket and is clamped with the guide rail in a sliding manner. The lifting platform has the advantages of steady, safe and reliable lifting, high lifting precision, large stroke, no noise when in use, no pollution of environment, simple structure and compactness.

The invention discloses an electric power overhauling lifting platform which comprises a device base; supporting bases are arranged at one end of the device base and at the two sides of the device base; the supporting bases are in threaded connection with a group of supporting bolts and are equipped with a locating drill rod in a penetrating mode; a group of lifting oil cylinders is arranged on the upper part of the device base; the lifting oil cylinders are connected with a middle platform; a middle guard bar is arranged on the middle platform; a reduction motor is arranged at one side of the middle platform; the reduction motor is in key connection with a wire winding wheel; a suspender cable is wound on the wire winding wheel; a shear type lifting device is arranged on the middle platform; the top of the shear type lifting device is connected with the top platform; a top guard bar is arranged on the top platform; and a storage battery and an illuminating lamp are further arranged on the top platform. The electric power overhauling lifting platform is extremely good in stability, is stable in lifting, is not liable to shake, improves overhauling working safety, is reliable in locating, has flexible operation and also has an illuminating function.

The invention provides a knotless needling machine, and belongs to the technical field of non-woven machinery. The needling machine comprises a rack, a needle beam, a needle beam driving mechanism, a needle hole board, a moving beam, a moving beam opening / closing mechanism and a moving beam lift adjusting mechanism, wherein an upper top plate is fixedly arranged on the top of the rack and a base plate is fixedly arranged at the bottom of the rack; a pair of upper beams are fixedly arranged on the upper top plate; a needle bed is fixed at the bottom of the needle beam; and needles are arrangedon the needle bed. The needling machine is characterized in that the right end of the moving beam is arranged on a vertical shaft; the vertical shaft is fixed between the upper top plate and the baseplate; the left end of the moving beam forms a free end; the moving beam opening / closing mechanism comprises an acting cylinder, a press arm and a press block; a carrier roller is arranged at one side, facing the press block, of the moving beam and a tension roller is arranged at the other side of the moving beam; and a limiting rod is fixedly arranged at the side at the right end of the moving beam. The needling machine has the following advantages: locking and opening of the moving beam can be guaranteed; when the limiting rod arranged on the moving beam is hindered by the vertical shaft, the opening of the moving beam is extremely limited; stable lifting of the moving beam is guaranteed; and the needling machine has a simple integral structure.

The invention discloses a multi-functional elevating platform with a simple structure, movement convenience and easy operation. The multi-functional elevating platform mainly comprises a platform (1), scissor forks (3), screws (7) and an elevation control device. The multi-functional elevating platform is implemented in a manner that the double screws are driven to rotate synchronously through the manual or mechanical transmission of chain gears, so that screw nuts are driven to make reciprocating movement, the scissor forks connected with the nuts are opened or closed, and then the platform goes up and down. The elevating platform is simple in structure, low in manufacturing cost, wide in use, stable in elevating and easy to position, is safe and reliable, can be applied to aloft working occasions such as power grid erection in decoration, can be elevated by various powers and further can be fixed on a motor-driven vehicle to move in various situations so as to be used conveniently and safely; and as the self-weight of the multi-functional elevating platform is reduced, the multi-functional elevating platform is labor-saving when being transported.

The invention belongs to the technical field of vehicle maintenance, and relates to a floating type counterpoint vehicle-mounted storage battery automatic replacing station which comprises a vehicle positioning and lifting mechanism for positioning and lifting an electric vehicle and a battery locking and unlocking mechanism for positioning and replacing a vehicle-mounted storage battery. The battery locking and unlocking mechanism comprises an ejecting assembly, a positioning assembly arranged on the ejecting assembly and a plurality of locking and unlocking assemblies arranged on the positioning assembly. The ejecting assembly comprises a lifting table for fixing the positioning assembly. The positioning assembly comprises a floating support, and at least two positioning pins arranged onthe upper side of the floating support. The floating support is hung below a lifting table through four chains. The positioning assembly can float by means of the chains, the position of the vehicle-mounted storage battery can be automatically fine adjusted according to the actual conditions of a chassis when the vehicle-mounted storage battery is arranged on the electric vehicle chassis, and theembedment failure is avoided.

The invention discloses a solar automatic lifting system for a rainwater grate; the solar automatic lifting system comprises a lifting device and a control mechanism which are arranged below the rainwater grate, and a solar power supply device which is externally arranged, wherein a mounting frame is detachably arranged on the sidewall of a drain well below the rainwater grate; the lifting device is composed of two shear arms which are relatively arranged and a linear motor; two ends of the shear arms are respectively arranged in the rainwater grate and a rail on the mounting frame in a sliding mode; the linear motor is arranged between the rainwater grate and the mounting frame; the control mechanism comprises an external rainfall sensor and a controller; and the controller is arranged inside the well wall of the sewer. The lifting system disclosed by the invention can be used for automatically lifting the rainwater grate according to rainfall, so as to solve the problem that rainwater cannot be removed timely in weathers of heavy rain and rainstorm since the cover of a conventional drain well cannot be opened timely.

The invention provides a leaching tank having an adjustable double shaft stirring device. The leaching tank comprises a tank body with the bottom provided with a residue discharging hole, a tank cover, a stirring shaft, stirring paddles and driving mechanisms, the stirring shaft comprises an internal shaft and an external shaft having a common axis, the lower end of the internal shaft is provided with an auxiliary stirring paddle, the lower end of the external shaft is provided with a main stirring paddle, the driving mechanism of the internal shaft is a first motor, the driving mechanism of the external shaft comprises a second motor, a small gear and a large gear, the small gear is connected with the large gear, the large gear is sleeved outside the external shaft, the small gear is engaged with the large gear, the outside of the external shaft is provided with a boss, and the external s haft is arranged on the tank cover through the boss. The stirring device comprises independent work double shaft, and the rotating directions and the rotating speeds of the shafts can be independently set as needed in order to guarantee the full stirring of a slurry.

The invention relates to a stacking device and a battery replacement apparatus. The stacking device comprises a frame, a stacking walking mechanism, a hoisting mechanism and a fork mechanism, wherein the stacking walking mechanism comprises a walking motor and walking wheels; the hoisting mechanism comprises a hoisting motor, a hoisting drive sprocket wheel, a hoisting tensioning sprocket wheel, a hoisting chain and a tray assembly; the hoisting motor is mounted on the frame; the hoisting drive sprocket wheel is connected with the hoisting motor; the hoisting tensioning sprocket wheel is arranged on the frame; the hoisting chain is arranged on the hoisting drive sprocket wheel and the hoisting tensioning sprocket wheel in drive and sleeving manners; the tray assembly is fixed with the hoisting chain; the fork mechanism comprises a fork motor, a fork gear, a fork gear rack and a fork plate; the fork gear rack is meshed with the fork gear; the fork plate is fixed with the fork gear rack. By arranging the stacking walking mechanism, the hoisting mechanism and the fork mechanism, which cooperate with one another, the stacking device can be used for realizing picking and placing operations carried out on an object, and is compacter in structure. In addition, compared with a conventional drive structure, the hoisting mechanism is smoother in going up and down and more reliable in safety performance.

The invention discloses a vertical elevating device with a deadweight balancing capability. The vertical elevating device is characterized in that a parallelogram transmission mechanism is arranged; a first rocking lever and a second rocking lever are articulated on top frames on both sides respectively; the first rocking lever is connected with the second rocking lever through a pull rod; the outer side rod ends of the first rocking lever and the second rocking lever are provided with a first slide block and a second slide block which are positioned at the same height; the first slide block and the second slide block are connected with a horizontal elevating framework through a sliding pair; and meanwhile, a crank rocker mechanism serving as a driving mechanism, a vertical elevating forked mechanism and a deadweight stabilizing unit constructed by a hydraulic cylinder are arranged. Through coupled movement of each mechanism, horizontal and vertical elevation for carried objects is realized; and the vertical elevating device is simple in structure, and has a high loading capability.

A vertical lifting column for lighting vehicle is composed oftwo pneumatic springs, 5 lifting pipes, 3 internal sleeves, 3 pulley sets, 3 steel cables and a manual rocker fixed to the first lifting pipe for driving the lifting up or lowering down of said lifting column.

The invention discloses an automatic focus numerical control laser cutter, which comprises a framework mechanism (1), a focusing mechanism (2), a lens seat mechanism and guide mechanisms (3) consisting of guide slots (3-1), guide keys (3-2) and locking screws (3-3). The framework mechanism comprises a fixed sleeve (1-1), a connecting seat (1-6) and a nozzle (1-7); the focusing mechanism comprises a worm (1-4), a worm gear (1-5), a bearing (1-2), a nut (1-3) and a trapezoidal thread sleeve (2-1); the lens seat mechanism comprises an upper lens seat (2-2) of a blow hole (2-2.1), a focusing lens (2-3) and an aqueous vapor seat (2-4) which consists of an upper part and a lower part and is provided with a blow hole (2-4.1) and an annular cooling water tank (2-4.2), a lower lens seat (2-5) and a ventilation seat (2-6); and the guide mechanisms are arranged in the aqueous vapor seat and bilaterally and symmetrically distributed by taking an axis of the cutter as a center. The cutter with the structure can realize high-precision, high-efficiency and smooth automatic focusing and has large focusing range and good focusing effects so as to expand the thickness range of plates to be cut.

The invention relates to a mobile type integrated construction platform, and a method for using the mobile type integrated construction platform in a wet tie-in which is spanned with a box beam to construct and an outer side template dedicated hanger used in the method of carrying out the wet tie-in construction. The mobile type integrated construction platform comprises a running frame and a running hanging rack which is fixedly connected with the lower part of the running frame; the upper end face of the main frame of the running hanging rack is fixedly connected with the beam of the running frame; the lower end face of the main frame is fixedly connected with the hanging rack; the front part and the rear part of the hanging rack are respectively provided with a hanging rack platform; the two ends of the hanging rack platform are respectively hinged with a side abutment platform. A sturdy and firm temporary construction platform can be formed by the hanging rack platforms and the side abutment platforms by adopting the mobile type integrated construction platform and the method of applying the mobile type integrated construction platform in the wet tie-in which is spanned with a box beam to construct. The side abutment platforms are dropped after the construction; then the mobile type integrated construction platform can be longitudinally moved to a next working face without repeatedly building and dismounting the construction platform, thus greatly reducing the work load of the construction and providing reliable guarantee to the construction safety.

The invention discloses a vertical air shaft explosion protection door / cover capable of quickly resetting, belonging to a coal mine ventilation safety facility. The vertical air shaft explosion protection door is mainly composed of a door body 2, a heavy punch part, an inverted ventilation lock catch device and an oiling small shaft, wherein multiple groups of heavy punch assemblies of the heavy punch part are variable quality tank heavy punch assemblies 4 or variable quality tanks 19, and the variable quality tank heavy punch assemblies 4 or the variable quality tanks 19 are connected with the explosion protection door body 2 by a steel wire rope 7 and a pulley block 8; the variable quality tanks 19 are liquid storage tanks and are connected with a water supply by a water inlet and outlet pipe 13; and water reserve in the variable quality tanks is increased or reduced to replace the action of increasing or reducing the number of the weight, thus controlling the weight of the heavy punch assembly. The explosion protection door is also provided with the quick inverted ventilation lock catch device 1 and a stable synchronous elevator mechanism. The explosion protection door adopts mechanical operation to realize remote monitoring of the latch and the reset of the explosion protection door, changes outdoor operation into indoor operation, has the advantages of high resetting and latching speed, time and labour saving and safe operation, lightens physical work and improves the coal mine ventilation safety.

The invention relates to an intelligent dejectas-collecting body-cleaning nursing system and a working method thereof. The intelligent dejectas-collecting body-cleaning nursing system includes a nursing bed and a dejectas-collecting body-cleaning robot, the nursing bed is set as a combination of a bed board assembly, a standing layer frame, a side-turning layer frame, and a base assembly, by setting a lifting telescopic mechanism, a side-turning telescopic mechanism, a standing telescopic mechanism, a curved leg telescopic mechanism and a back-retracting mechanism, the nursing bed has the functions of lifting, lying down, side turning, bending, sitting, and standing features; through the combination of different telescopic mechanisms, a combination of various functions such as side-turningand back-retracting, side-turning and sitting can be realized at the same time; the dejectas-collecting body-cleaning robot adopts an obstacle avoidance sensor, a tracking sensor and a controller torealize the automatic obstacle avoidance and active tracing, so that the robot can move to the bottom of a defecation port according to the position of a cover when the cover is opened.

The invention discloses an automatic control device of drop transfusion system, which consists of lye storage and float in the lye storage, wherein the liquid-in needle (1) with liquid-in opening (2) and vertical convex area (3) toward intracavity with liquid-out opening (4); the float contains cylindrical floater (5) and soft elastomer sealer (8). There is longitudinal gap between sealer (8) and vertical convex area (3) that matches each other. The invention provides a precise and reliable sealed transfusion system with automatic closing system effectively, which can be applied in the medical treatment domain widely.

A multi-dimensional dynamic stage comprises a hollow outer frame, a stage, a swing frame, first hydraulic cylinders and second hydraulic cylinders. A crane capable of ascending and descending is arranged in an inner cavity of the hollow outer frame, and piston rods of the first hydraulic cylinders are connected with the lower end of the crane; the swing frame is mounted below the stage and is connected with the stage by a rotary support, a driving motor and a driving gear are mounted on a side surface of the swing frame, and the driving gear is matched with the rotary support; and a first lug is arranged on the upper end surface of the crane, one end of the swing frame is hinged with the crane by the first lug, a step is arranged on the crane, the second hydraulic cylinders are hinged on the step, and piston rods of the second hydraulic cylinders are hinged with the other end of the swing frame. The multi-dimensional dynamic stage has the advantages that ascending, descending, declining and rotating effects can be realized by matching of the crane, the swing frame and the rotary support according to requirements of a story line, audiences feel awed and excited, and performance scenes are abundant.

The invention belongs to the field of lifting equipment, and in particular relates to a pivot fixed multi-face constrained scissor-type lifting mechanism. Three groups of scissor-type trusses are vertical to a base; the bottom ends of the three groups of scissor-type trusses are connected with three epsilon-type connecting pieces which are fixed on the base in a regular triangle manner respectively so as to form rotation pairs, and the top ends of the three groups of scissor-type trusses are connected with three epsilon-type connecting pieces which are fixed on the lower plane of a supportingplatform in the regular triangle manner respectively so as to form rotation pairs; the three groups of scissor-type trusses are in regularly triangular prism arrangement between the supporting platform and the base; an angle between the plane on which each group of scissor-type truss is placed and the plane on which the adjacent scissor-type truss is placed is 60 degrees; among the three groups of scissor-type trusses, central hinging points of crossed connecting rods of scissor layers are connected with the corresponding peaks of the regularly triangular connecting pieces so as to form rotation pairs; and a driving device supports the regularly triangular connecting piece of the first scissor layer on the base so as to drive the whole lifting mechanism to lift. The pivot fixed multi-faceconstrained scissor-type lifting mechanism has a stable structure and high rigidity, and is applicable to environments having requirements such as large loading capacity, working height and the like which cannot be met by general lifting equipment.