69 results about "Gallows" patented technology

The utility model relates to a ground fissure width and settlement monitoring device which is characterized in that an adjusting arm is arranged on a supporting table, one end of the adjusting arm is installed on the supporting table through a gallows, the end, away from the supporting table, of the adjusting arm is installed on a measuring structure through a gallows, and a vertical distance measuring rod used for fissure depth measurement is installed at the center of an installation block in a sliding mode; one end, close to the crack, of the vertical distance measuring rod is provided with a measuring head, the two adjusting arms are provided with extension heads, the extension heads are installed on a limiting frame, and the limiting frame enables the inclination angles of the two adjusting arms to be the same in the placing process of the device, so that the positioning head can be placed at the crack when the device is placed, and the positioning head is in contact with the crack; it can be guaranteed that the measuring head makes contact with the two edges of a crack in the measuring process, the situation that the measuring head inclines in the adjusting process of the device is avoided, the positioning head is preferentially placed in the installing process, the positioning head and the measuring head are the same in shape, the adjusting arm is controlled to enable the supporting table to be stably supported on the ground, and fixing of the device is achieved.

The utility model discloses an auxiliary device for mounting a mold of an injection molding machine, which comprises a hanging bracket, a driving component is arranged at the bottom of the hanging bracket, the driving component comprises a two-way screw and a motor, the two-way screw is rotatably connected with the hanging bracket, the motor is attached to one end of the hanging bracket, and the output end of the motor is connected with the two-way screw; and clamping plates are connected to threads, in two different directions, of the two-way screw rod, supporting plates are arranged at the bottoms of the clamping plates and are in an L shape, lifting screw rods are rotationally connected to the outer side faces of the clamping plates, and the bottom ends of the lifting screw rods are in threaded connection with the supporting plates. The lifting frame is arranged, the driving assembly is arranged on the lifting frame, the clamping plate and the supporting plate can be driven by the driving assembly to clamp and fix a mold, and therefore the mold can be conveniently lifted; and meanwhile, the position of the supporting plate can be adjusted through the lifting screw, so that the supporting plate can support the mold, and the top of the mold abuts against the bottom of the hanging bracket.

The utility model belongs to the technical field of building construction, and particularly relates to a portable building construction material lifting device which comprises a J-shaped frame, a vertical beam is welded to the upper portion of the J-shaped frame, a frame hook portion is arranged at one end of the J-shaped frame, a bottom locking rod is installed in the frame hook portion in an inserted mode, and a top locking rod is installed at the top of the vertical beam in an inserted mode. A lifting frame is welded between the vertical beam and the J-shaped frame, a lifting motor is installed on the lifting frame, a rotating disc shaft is installed at one end of the lifting frame through a bearing, traction rope rotating discs are arranged at the two ends of the rotating disc shaft, a hanging bracket traction rope is wound around the traction rope rotating discs, and a material hanging bracket is connected to the lower end of the hanging bracket traction rope. A supporting plate is installed at the upper end of the top locking rod, moving wheels are arranged at the bottom of the hook portion of the frame, and a frame push rod is further welded between the J-shaped frame and the vertical beam. The device is compact in structure and convenient to install, and the problems that a traditional material lifting device is poor in mobility, insufficient in safety and the like can be effectively solved.

The utility model discloses a telescopic manual lifting appliance for a lower car body, which comprises a left lifting frame and a right lifting frame which have the same structure, the left lifting frame is in sliding connection with a body frame through a linear sliding rail, and the left lifting frame and the right lifting frame are connected together through a connecting rod mechanism. The manual lifting appliance is convenient to operate, is manually operated in the whole process, does not need an additional power source, and can be easily opened and retracted by one person.

The utility model discloses a central air conditioner air pipe installation hanging bracket which comprises an installation top plate, a hanging mechanism is arranged at the bottom of the installation top plate, the hanging mechanism comprises an installation base, an installation sleeve A, an adjusting nut A and a hanging screw rod, and a connecting mechanism is arranged at the bottom of the hanging screw rod. The connecting mechanism comprises a mounting rod, a rotating seat and a connecting support, an adjusting mechanism is arranged on the outer side of the mounting rod, and a mounting mechanism is arranged at the bottom of the connecting support; the central air conditioner air pipe is positioned and mounted through the mounting mechanism, the hanging brackets are integrally mounted on the top of a wall, the central air conditioner air pipe is suspended and mounted through the multiple sets of hanging brackets, and the transverse and longitudinal inclination conditions of the central air conditioner air pipe are detected by means of equipment such as an external gradienter. The transverse inclination condition of the central air conditioner air pipe is adjusted through the hoisting mechanism, the longitudinal inclination condition of the central air conditioner air pipe is adjusted through the adjusting mechanism, and normal use and maintenance of the central air conditioner air pipe are guaranteed.

The utility model relates to hollow glass production technical field, concretely is the unloading auxiliary gallows for hollow glass production, including roof, roof bottom fixedly connected with several groups of connecting rod, the connecting rod bottom fixedly connected with the connecting plate, the connecting plate top fixed mounting has the cylinder, the output fixedly connected with the suction cup frame of cylinder, the suction cup frame bottom fixed mounting has several groups of vacuum suction cup, the output outside sliding of cylinder is equipped with the connecting sleeve, the connecting sleeve top with connecting plate bottom fixed connection, install the protection subassembly of preventing glass falling on the connecting sleeve, install the adjusting assembly of adjusting protection subassembly position on the connecting sleeve, through the cooperation of adjusting assembly and protection subassembly, can fix the hollow glass of different size, different thickness, and then can prevent the glass falling in the hoisting process because of vacuum suction cup ageing, equipment failure and so on, eliminate the potential safety hazard, reduce production cost.

The shuttering system (1) comprises at least one door (10) for shuttering an opening (3), and a locking mechanism (50) comprising at least: a fixed or movable vertical beam (51) along the longitudinal direction (X), a cremone rod (52) extending along the vertical direction (Z) being movable between a locked position and an unlocked position, and a rod receiving bracket (54), the bracket (54) being disposed at a vertical end (53) of the beam (51) and having an L-shape such that the bracket (54) has a first portion (56) extending in the vertical direction (Z) and a second portion (58) extending in the longitudinal direction (X) and having an opening (60) receiving the rod (52) along the vertical direction (Z) in the rod (52) locking position, and not receiving the rod. (52) in the unlocked position. Figure from the summary: Figure 1

The utility model relates to the technical field of auxiliary hoisting devices, and discloses an auxiliary hoisting device for mounting a pipeline hanger, which comprises a supporting bottom plate, moving wheels are arranged at the bottom of the supporting bottom plate, and a control switch is fixedly mounted at the top of the supporting bottom plate. And supporting guide columns are uniformly and fixedly mounted at the top of the supporting bottom plate at equal intervals. A lifting hydraulic cylinder is arranged to drive a lifting plate to stably move up and down, so that the height of a clamping part is flexibly adjusted, the device can adapt to the operation requirements of different heights, a fixed sliding plate is in sliding connection with a first sliding groove in a cap-shaped supporting frame in a matched mode, stable supporting is provided, and meanwhile the working efficiency is improved. And a motor on the L-shaped supporting plate drives a connecting block to move left and right in a second sliding groove through an adjusting lead screw, so that adjustment of the installation position of a U-shaped plate and the position of a clamping part is achieved, the device can easily meet the installation requirements of pipeline hanging brackets with different widths or positions, and the effect of improving operation flexibility and applicability is achieved.

The utility model relates to the technical field of glass processing transportation equipment, in particular to a glass processing vacuum chuck carrying mechanical arm which comprises a supporting piece and a carrying piece, the supporting piece comprises a bottom plate, a cylinder frame and a sliding frame, the cylinder frame is vertically and rotatably connected to the upper portion of the bottom plate, the sliding frame is horizontally fixed to the top face of the cylinder frame, and the carrying piece is arranged below the sliding frame. The carrying part comprises a hanging bracket, the hanging bracket is arranged below the sliding frame, a vacuum suction cup is horizontally fixed to the lower side of the interior of the hanging bracket, a movable rod frame is horizontally fixed to the outer side of the bottom of the vertical end face of the hanging bracket, an abutting hydraulic rod is horizontally fixed to one end of the movable rod frame, an abutting plate is vertically arranged on the movable rod frame, and a hole seat is horizontally fixed to the top face of the abutting plate; the hole seat is horizontally and slidably assembled on the movable rod frame, and the output end of the abutting hydraulic rod is fixed to the outer wall of the hole seat. The side face of the glass plate is clamped through the abutting-pressing plates, displacement of the glass plate is limited through the abutting-pressing plates, and the glass plate hoisting effectiveness and stability are kept.

The utility model relates to the technical field of roller machining, in particular to a cold type rotary lifting appliance for roller manufacturing. Comprising a hanger, a hydraulic system and a clamping mechanism, a lifting hook is arranged in the middle of the top end of the lifting frame; the clamping mechanism comprises a left clamping mechanism and a right clamping mechanism which are symmetrical to each other and are respectively arranged on the left side and the right side of the inner side of the hanging bracket, taking the left clamping mechanism as an example, the clamping mechanism comprises four connecting rods rotationally fixed on the left wall of the inner side of the hanging bracket, every two connecting rods are in a vertical plane, and the tail ends of the four connecting rods are rotationally fixed on a hydraulic motor fixing platform; the hydraulic system comprises a remote control hydraulic station arranged in the hanging bracket side arm and a hydraulic motor horizontally fixed on a hydraulic motor fixing platform, two connecting rods on the upper side of the four connecting rods are respectively provided with a hydraulic cylinder, and push rods of the hydraulic cylinders are rotationally fixed at the tail ends of the two connecting rods on the upper side; and V-shaped cold type clamps are fixed on shafts of the hydraulic motors on the left and right sides.

Decorative article in the form of a curved glass bracket on a base for placement on a cabinet, shelf, table, board or other location in combination with a figurine suspended from it, characterized in that a gallows-like bracket (2) is hollow and is provided with an opening (6) at its upper end and with an opening (7) at its lower end on the base (1), wherein an electrical cable (3) extending from a power supply (8) to the LED light source (5) is arranged within the cavity in the bracket (2) through the lower opening (7) and the upper opening (6) for power supply.

The utility model discloses a prefabricated rectangular groove component light-loading and light-unloading hoisting device, and relates to the technical field of prefabricated component hoisting, the prefabricated rectangular groove component light-loading and light-unloading hoisting device comprises a hanging bracket, reinforcing frames and a prefabricated rectangular groove component body, the reinforcing frames are fixed at the front end and the rear end of the upper surface of the hanging bracket in a welding mode, and connecting discs are fixed at the top ends of the reinforcing frames; a lifting machine connecting rope penetrates through the interior of the connecting disc, a rectangular block is fixed to the middle of the lifting frame, limiting rods are fixed to the left side face and the right side face of the rectangular block, screw holes are formed in the limiting rods at equal intervals, the limiting rods penetrate through the interior of a moving plate, and a mounting box is fixed to the bottom end of the moving plate; a motor is fixed to the outer side face of the mounting box. According to the light-loading and light-unloading hoisting device for the prefabricated rectangular groove component, the position of a connecting structure can be conveniently adjusted according to the size of a prefabricated rectangular groove component body, the exposed length of a connecting rope of each component can be conveniently adjusted, and the levelness and orientation of the prefabricated rectangular groove component body can be adjusted.

PYLON HEAD AND METHOD FOR ASSEMBLING A PYLON HEAD A pylon head (1) of a cable transport installation comprises a jib (2) and a footbridge (3). A first fixing piece (4) is attached to the jib (2) and a second fixing piece (5) is attached to the footbridge (3). The first fixing piece (4) is a hook (A). The second fixing piece (5) defines a hole (B) receiving the hook (A). The hook (A) defines a downward vertical driving direction (Z). The hook (A) and the hole (B) are able to drive into each other along the driving direction (Z) until the footbridge (3) is abutted against the jib (2). The hook (A) defines a decreasing section along the direction of penetration (Z) until the position where the footbridge is against the stop to bring the footbridge (3) and the gantry (2) closer together.

The utility model discloses a semi-underground furnace charging lifting platform and a foot pressing prevention device, and belongs to the technical field of equipment safety protection. Comprising a lifting table, a bottom frame and a lead screw driving assembly, wherein the lifting table and the bottom frame are oppositely arranged in parallel, and a first hinge frame and a second hinge frame which are hinged to each other are arranged between the lifting table and the bottom frame; wherein one end of the first gallows is hinged to the lifting platform, and the other end is slidably connected to the underframe; one end of the second gallows is hinged to the underframe, and the other end is slidably connected to the lifting platform; the lead screw driving assembly comprises a servo motor and a lead screw assembly, the lead screw assembly comprises a driving lead screw connected with the servo motor and an external member arranged on the first gallows, and the external member is in threaded connection with the driving lead screw; the utility model aims to overcome the defects in the prior art, and provides the semi-underground furnace charging lifting platform and the foot pressing prevention device, so that the lifting platform can be prevented from accidentally falling in an emergency, and operators are protected.

The utility model discloses a cable bridge hoisting structure, including fixed plate and gallows body, the gallows body with fixed plate fixed connection, the fixed plate passes through fixed bolt and wall fixed connection, be provided with the base of U shape on the gallows body, be provided with the opening on the base, the fixed rod is movably installed in the opening. The utility model provides a cable bridge hoisting structure, installs the fixed plate on the wall through fixed bolt, and is connected gallows body through the extension board of both sides setting, and through the connection between the adjusting screw base and threaded rod, make the fixed rod move to the appropriate position, when installing one or more gallows body, can in the fixed rod of adjustment, make the supporting rod and the outer wall of downside contact, present the action of lifting, steady gallows body, at the same time, the top touch rod will with the side wall of gallows and resist solid, stabilize gallows body, make the installation work of multiple gallows body convenient and fast, be favorable to use.

The utility model provides a quartz crucible lifting device which comprises a lifting frame, a lifting assembly and an adjusting assembly, the lifting assembly is arranged on the lifting frame, a steel wire rope of the lifting assembly is connected with the adjusting assembly, a rotary arm is arranged on the adjusting assembly, the lower end of the rotary arm is fixedly connected with a holding arm, and the adjusting assembly is used for adjusting the holding arm to be opened or closed. According to the quartz crucible lifting device, one operator can be saved, the lifting device is convenient to use, flexible to move, labor-saving, capable of working continuously and the like, the risk of polluting and damaging the crucible is further reduced, and the quartz crucible lifting device has remarkable advantages in the aspects of portability, safety, operation convenience, high efficiency, protective design and the like, and is suitable for popularization and application. And the requirement for frequent hoisting of the quartz crucible in industrial production can be well met, and the quartz crucible hoisting device is reasonable in design and high in practicability.

The utility model relates to the field of sample injection valves, in particular to four-axis manipulator matched shearing equipment for realizing automatic shearing of different products, which comprises a connecting plate and a shearing component, and the shearing component comprises a cutting disc, a hanging bracket, a support table, a cutting component, a controller and an electromagnetic valve; a bolt groove is formed in the connecting plate and used for being connected with hoisting equipment, the cutting disc is installed through the hanging bracket, in order to guarantee the stability of the cutting disc, a supporting table is additionally installed at the bottom of the cutting disc, and therefore the supporting performance of the hanging bracket is improved, the cutting disc is independently manufactured according to the stub bar position of each product, and a cutting component is arranged on the cutting disc and used for cutting the products. The electromagnetic valve sends an electric signal to control the cutting component to run, the controller sets a device running program and is internally provided with a Bluetooth module, remote operation can be achieved, and the problems that according to existing shearing, the material head is manually trimmed by manually holding diagonal pliers, the working intensity of workers is large, the working efficiency is low, and the trimming difference is large are solved.

The utility model relates to the technical field of line maintenance, and provides a power station protection hanging bracket convenient for line maintenance, which comprises a hanging bracket body, two sides of the bottom of the hanging bracket body are both fixedly provided with bases, and the top sides of the rear sides of the two bases are both fixedly provided with motors. The front sides of output shafts of the two motors are fixedly installed on the rear side of the forward rotation lead screw. When the lifting frame is used, through the arrangement of the forward rotation lead screw and the supporting rod structure, the lifting frame body can move conveniently, meanwhile, after the lifting frame body moves to the needed position, the motor drives the forward rotation lead screw and the reverse rotation lead screw to rotate reversely, it is ensured that the universal wheels are retracted into the base, and the lifting frame body is prevented from moving or inclining accidentally; and contraction of the universal wheels enables the bottom of the base to be tightly attached to the ground, the stability and safety of the hanging bracket body in the working process are enhanced, and the accident risk caused by accidental displacement of the universal wheels is reduced.

The utility model discloses a construction hanging bracket for bridge construction, which comprises a truck, a connecting plate fixedly mounted in a hopper of the truck, a turntable rotatably mounted on the upper surface of the connecting plate, a guide frame fixedly mounted on the upper surface of the turntable, a guide plate slidably mounted in the guide frame, and a U-shaped frame fixedly mounted in the guide plate. And a transmission column is rotationally installed on the lower surface of the U-shaped frame and is installed on the outer surface of a first threaded rod in a threaded mode, the first threaded rod is fixedly installed between the rotating disc and the guide frame, a sliding frame is fixedly installed at one end of the guide plate, and a bridge construction auxiliary lifting mechanism is slidably installed in the sliding frame. According to the auxiliary lifting mechanism for bridge construction, through the design of the auxiliary lifting mechanism for bridge construction, by adjusting and controlling the hanging basket in the three axial directions of perpendicularity, rotation and extension, the auxiliary lifting mechanism can flexibly reach and conduct construction on the upper structure, the lower structure and the complex side face modeling of a bridge, and the adaptability to different bridge structures is greatly improved.

The utility model discloses an assembled horse path relates to assembled horse path technical field, including light channel steel, U -shaped card, angle steel fixing, angle steel connecting piece, round steel, and light channel steel girder is fixed on the bolt ball through U -shaped card and angle steel fixing, still includes ring hoop, ring hoop support, round tubular column, cross round tubular column, square tube handrail, column connecting plate, gallows and steel grating, and ring hoop is fastened on angle steel connecting piece through bolt, and ring hoop support sets up at ring hoop all around, this assembled horse path has modularization design, and simple and easy processing, and convenient installation, and construction efficiency is high, and the characteristics such as high flexibility and high safety: all adopt the standardized prefabricated component and bolt connection mode, and the construction site is simple and convenient to install, and construction efficiency is high, satisfies the construction requirement of green environmental protection, all adopt bolt or rivet connection, and the node quality is high, and the overall structure stability is strong, and the horse path needs to be removed in later period, then simple and fast removal, and the component can be repeatedly used.

The utility model belongs to transformer processing technical field especially relates to a gallows used in transformer processing, including the chassis and the gallows of fixed connection in the left and right sides of chassis, the top of chassis is provided with clamping device, the clamping device includes sliding mechanism and buffer mechanism, the front of top of chassis is connected with baffle, sliding mechanism includes clamping plate, slide rod, sliding sleeve, locking bolt and bolt hole. This gallows used in transformer processing, when processing the transformer, first place the transformer on the top of clamping plate, push clamping plate and drive sliding sleeve to slide on the surface of slide rod, when the transformer contacts baffle, continue to push clamping plate and make the transformer extrude air bag, then use locking bolt to pass through through -hole and be connected in the inside of bolt hole with screw thread, fix the transformer, according to the size of transformer can replace the locking bolt of different length, be convenient for the adaptation of different transformer.

The utility model provides an automatic lifting maintenance device of hydrological equipment, which comprises a fixed support, a lifting hanging bracket and a driving mechanism, the lifting hanging bracket is hinged on the fixed support around a horizontal axis, a guide slide way for the hydrological equipment to slide is formed on the lifting hanging bracket, and the driving mechanism is arranged on the guide slide way. The guide slide way comprises a first guide section and a second guide section which are sequentially distributed, and an included angle of 120-150 degrees is formed between the first guide section and the second guide section; the lifting hanging bracket rotates around the horizontal axis so that the inclination of the guide sliding way can be changed. The driving mechanism comprises a rope winding shaft and a motor used for driving the rope winding shaft to rotate, a rope is wound on the rope winding shaft, and the rope is connected to the lifting hanging bracket. According to the automatic lifting maintenance device of the hydrological equipment, the underway ADCP can be stably lifted to a shore / ship from a water body, collision damage to the underway ADCP is avoided, and the follow-up maintenance load of the underway ADCP is prevented from being increased.

The utility model belongs to the technical field of slicing machines, and particularly relates to a constant-force cutting horizontal slicing machine which comprises a supporting table, a support is fixedly connected to the top of the supporting table, a fixing plate is fixedly connected to one side of the interior of the support, a first sliding rail is fixedly connected to the inner wall of the support, and sliding plates which are in bilateral symmetry are slidably connected to the outer wall of the first sliding rail. One side of the outer wall of the fixed plate is rotationally connected with a gallows, the outer wall of the gallows is rotationally connected to one side of the outer wall of the sliding plate, one side of the interior of the support is fixedly connected with an electric push rod, the output end of the electric push rod is fixedly connected to one side of the outer wall of the sliding plate, and the bottom of the fixed plate is rotationally connected with a cutting edge. And under the connection of the gallows (9), the distance between the sliding plate (7) and the fixed plate (8) can be kept the same, so that slicing with the same thickness is realized, the problem of low slicing efficiency caused by single slicing is solved, and the slicing efficiency of the slicing machine is improved.

The utility model provides a main tower pouring device of an oversized span extradosed cable-stayed bridge, and relates to the technical field of main tower pouring, the main tower pouring device comprises a hanging bracket and a concrete mortar tank, the lower part of the hanging bracket is provided with an X-axis linear sliding rail, the X-axis linear sliding rail is connected with a first sliding block in a sliding manner, a side fixing plate is fixed below the first sliding block, and the side fixing plate is connected with the concrete mortar tank. A lower supporting frame is fixed to the lower portion of the inner side of the side fixing plate, a concrete mortar tank is supported on the lower supporting frame, a discharging pipe opening is formed in the lower end of the concrete mortar tank, a telescopic pouring pipe is connected to the discharging pipe opening, a sealing sleeve is arranged on the upper portion of the telescopic pouring pipe, and the discharging pipe opening is sleeved with the sealing sleeve. The pouring alignment position of the main tower can be conveniently and flexibly adjusted, pouring alignment is convenient and reliable, materials in the concrete mortar tank are stirred and mixed from the middle to the left and right, rapid flowing of the materials is promoted, gathering and caking are avoided, pouring and discharging are smoother and rapider, and the pouring device is more flexible and practical.

The present invention relates to the technical field related to spindles, and discloses a direct-connected spindle structure for a high-precision machine tool. In the present invention, a driving gallows is arranged between the spindle and a fixed sleeve, and the driving gallows follows the rotation of the spindle. Therefore, when the spindle rotates, the driving gallows causes the lubricating oil to circulate in the oil storage chamber and the movable groove by rotation, which not only lubricates the bearings with the oil, but also takes away the temperature in the spindle with the lubricating oil, thereby reducing the temperature of the spindle. At the same time, since the driving gallows is provided with multiple turns of screw channels, the residence time of the lubricating oil in the driving gallows is increased, the heat reduction rate is increased, and finally the purpose of circulating cooling and real-time lubrication is achieved.

The utility model provides a lifting appliance for lifting a photovoltaic platform, and belongs to the field of photovoltaic platform construction. According to the technical scheme, the lifting device comprises a lifting frame and a plurality of distribution bottom beams arranged at the bottom of the lifting frame, the lifting frame comprises a frame structure used for connecting the distribution bottom beams and a lifting assembly connected to the upper portion of the frame structure, the frame structure is formed by splicing a pair of cross beams and a pair of connecting beams end to end, and the adjacent cross beams and connecting beams are hinged; the distribution bottom beam is a carrying pole beam, the middle position of the carrying pole beam is hinged to the end of the cross beam, unhooking assemblies are arranged at the two ends of the carrying pole beam, and assembling hanging belts are arranged on the unhooking assemblies. The utility model has the beneficial effects that the frame structures are arranged in a mutually hinged manner, and meanwhile, the arrangement of lifting points is optimized, so that the lifting process is more stable, the deformation of the platform can be effectively reduced, and meanwhile, an automatic unhooking device is introduced, so that the safety and the construction efficiency are obviously improved.

The utility model relates to the technical field of elevators, and discloses an elevator door protection structure which comprises a shell, a motor is fixedly connected to the interior of the shell, a first gear is fixedly connected to the output end of the motor, a second rack is connected to the outer side wall of the first gear in a meshed mode, and a first sliding groove is formed in the shell. A first sliding groove is formed in the shell, a sliding block is slidably connected into the first sliding groove, the second rack is arranged on the outer side wall of the sliding block, a second gear is rotationally connected to the outer side wall of the sliding block, a first rack is arranged in the shell, one side of the second gear is connected to the outer side wall of the first rack in a meshed mode, and a third sliding groove is formed in the shell. And the interior of the third sliding groove is slidably connected with an elevator door, and a third rack is arranged at the bottom of the elevator door. According to the elevator door protection device, when the elevator door is protected, firstly, the telescopic effect of the elevator door is achieved through cooperation of the gear and the rack, and then the elevator door is fixed through the gallows, so that the effect of protecting the elevator door is further achieved.

The utility model belongs to the technical field of laser installation, and particularly relates to an upper adjustable fixing device for a multi-beam visible laser. Comprising a hanging bracket and a laser adjusting support, the top end of the suspender is connected with a tunnel top plate, and the suspension platform is suspended at the bottom end of the suspender. A turntable is mounted on the suspension platform; a laser adjusting bracket is mounted at the top of the turntable; the laser adjusting bracket comprises a fixed bracket body and a swinging bracket body, and the swinging bracket body is arranged in the fixed bracket body and is connected with the fixed bracket body through two horizontal rotating shafts; wherein one horizontal rotating shaft is sleeved with a rocking handle, and the rocking handle is in threaded connection with a first fastening screw capable of jacking the horizontal rotating shaft in the radial direction. An adjusting screw rod and an elastic telescopic rod are arranged on the fixed frame body, and the handle part of the rocking handle is positioned between the adjusting screw rod and the elastic telescopic rod; the hanging bracket has the height adjusting function, the laser adjusting support has the horizontal and vertical angle adjusting function, and the application range is wide.

The invention discloses an easy-to-operate lifting device suitable for a narrow space, and relates to the technical field of lifting equipment, a plurality of groups of gallows lifting mechanisms are arranged at the upper end of a frame of a supporting frame, a guide rail of a guide sliding rail is slidably connected with a guide sliding table, and a supporting platform is arranged at the upper end of a rack of the guide sliding table; and a chain transmission mechanism for driving the gallows lifting mechanism is arranged at the upper end of the supporting platform. According to the design, based on integrated assembly of the multiple groups of gallows lifting mechanisms, under linkage transmission of the chain transmission mechanism, the multiple groups of gallows lifting mechanisms are pushed to lift in an independent lifting mode in an integrated linkage mode, the state of independent operation and linkage lifting is formed, mechanical equipment is lifted and shored, the occupied space of lifting in the gallows mode is smaller, and the lifting efficiency is improved. The lifting mechanism is suitable for various complex space environments, the self-stability of independent lifting is better, the influence of other parts is smaller, the state is more stable, and the conditions of shaking and the like caused by overall linkage lifting can be reduced.

Game hanging gallows / hanging gallows, for hanging items such as game, camping showers, nesting boxes, or other objects that need to be quickly hung and taken down from trees or other vertical posts. They are characterized by consisting of 3 to 15 parts. The lower part (1) is positioned at a right angle to the trunk and is held by the upper part (2), which is positioned at a 45° angle to the trunk. The upper part (2) is secured to the trunk by a strap or wire.