CN112499503B

CN112499503B - Pulley structure

Info

Publication number: CN112499503B
Application number: CN202011477886.0A
Authority: CN
Inventors: 李贺; 张跃洋; 邴常松; 李亮; 崔永波; 刘丽敏
Original assignee: Sino Italian Taida Yingkou Garage Equipment Co ltd
Current assignee: Sino Italian Taida Yingkou Garage Equipment Co ltd
Priority date: 2020-12-15
Filing date: 2020-12-15
Publication date: 2021-09-21
Anticipated expiration: 2040-12-15
Also published as: CN112499503A

Abstract

A pulley structure belongs to the technical field of lifting machines, and particularly relates to a pulley structure. The invention provides a pulley structure with a good using effect. The pulley structure (1-7) comprises a pulley assembly (6-1), wherein a pulley roller press-in shaft sleeve (6-3) penetrates through a pulley roller shaft (6-4) and is fixed on the pulley assembly (6-1); the cover (6-8), the cover II (6-29) and the wire groove (6-32) are fixed on the pulley assembly (6-1) by screws (6-31); the turbine box limiting seat (6-28) and the distribution box (6-30) are fixed on the pulley assembly (6-1) by screws (6-28); the coil (6-27) penetrates into the pulley assembly (6-1); a travel switch assembly (6-21) is arranged on the pulley assembly (6-1); the pulley assembly (6-1) is provided with a locking hook (6-13).

Description

Pulley structure

Technical Field

The invention belongs to the technical field of lifting machines, and particularly relates to a pulley structure.

Background

With the rapid development of economy, the shortage of storage space brings great trouble to people, and the shortage of the use space can be made up only by improving the utilization rate of the spaces with different heights. The single-column lifting machine can lift heavy objects conveniently and laborsavingly, has the effects of saving time and labor and is convenient for placing articles. The existing single-column lifting adopts a hydraulic structure, and a pump station with the structure has the advantages of large occupied space, high noise and environmental pollution caused by hydraulic oil. And a matched pulley structure with good use effect needs to be designed for designing a single-column lifting machine with good use effect.

Disclosure of Invention

The invention aims at the problems and provides a pulley structure with good use effect.

In order to achieve the purpose, the invention adopts the following technical scheme that the pulley structure (1-7) comprises a pulley assembly (6-1), a second shaft sleeve (6-3) is arranged on a pulley roller, a pulley roller shaft (6-4) is arranged in the second shaft sleeve (6-3), and the pulley roller shaft (6-4) is arranged on the pulley assembly (6-1);

the cover (6-8) is arranged on the right side of the pulley assembly (6-1), the second cover (6-29) is arranged in the middle of the left side of the pulley assembly (6-1), and the wire groove (6-32) is arranged on the lower part of the left side of the pulley assembly (6-1) through a screw (6-31);

the turbine box limiting seat (6-28) is arranged in the middle of the left side of the pulley assembly (6-1), and the power distribution box (6-30) is arranged on the lower portion of the left side of the pulley assembly (6-1);

the upper end of the left side of the pulley assembly (6-1) is provided with a coil (6-27);

the upper part of the left side of the pulley assembly (6-1) is provided with a travel switch device (6-21);

a locking hook (6-13) is arranged at the lower part of the right side of the pulley assembly (6-1);

a pulley pulling device (6-23) is arranged at the upper part in the pulley assembly (6-1), the pulley pulling device (6-23) is connected with a lifting rope device (6-22), and the upper end of the lifting rope device (6-22) is connected with a steel wire rope;

a pulley (1-7) is provided with a front-end lower pulley roller and a rear-end upper pulley roller (6-2), the rear-end upper pulley roller (6-2) is pressed into a second shaft sleeve (6-3) and penetrates through a pulley roller shaft (6-4) to be fixed on a pulley assembly (6-1), and a gap adjusting jackscrew (6-7) is arranged on the pulley assembly (6-1) corresponding to the pulley roller shaft (6-4);

side pulley rollers are arranged on two sides of the pulleys (1-7);

the pulley rollers (6-2-2) and the pulley rollers (6-2-5) play a main bearing role, the pulley rollers (6-2-2) have a function of adjusting the gap, the gap between the pulley rollers and the upright post is adjusted by rotating the set screws (6-7), and the included angle a (figure 17) between the bearing flat plate (1-3) and the ground can be adjusted. The pulley rollers (6-2-3), the pulley rollers (6-2-4), the pulley rollers (6-2-7) and the pulley rollers (6-2-8) mainly play a role in guiding, wherein the pulley rollers (6-2-7) and the pulley rollers (6-2-8) have a function of adjusting gaps, the gaps between the pulley rollers and the upright posts are adjusted by using the set screws (6-7), and the heights L1 and L2 (figure 17) of the two sides of the bearing flat plate (1-3) can be adjusted.

As a preferable scheme, the travel switch device (6-21) (the contact of the travel switch device (6-21) is contacted with the screw (5-8) to stop rising) is fixed on the pulley assembly (6-1) by using a screw (6-18), a spring washer (6-19) and a flat washer (6-20).

As another preferred scheme, flat washers (6-12) are arranged on the lock hooks (6-13), lock fixing shafts (6-11) penetrate through the flat washers (6-12), shaft clamp springs (6-10) for limiting are arranged on two sides of the lock fixing shafts (6-11), and the lock hooks (6-13) are fixed on the pulley assembly (6-1);

one end of a lock tension spring (6-9) is connected with the pulley assembly (6-1) through a screw (6-15), and the other end is connected with a lock hook (6-13);

one end of each steel wire rope (1-9) is fixed on the lifting rope device (6-22), the other end (6-16) is fixed on the lock hook (6-13) through a screw (6-15), and the gap between the lock hook (6-13) and the upright column square tube (5-11) is adjusted through the galvanized double clamp (6-17).

As another preferable scheme, after one threaded end of the pulley pulling device (6-23) is screwed into the pulley assembly (6-1) and fastened, the other end of the pulley pulling device is locked on the pulley assembly (6-1) through a flat washer (6-24) and a nut (6-25).

The pulley structure can be applied to a column type lifting machine, the column type lifting machine comprises a bearing flat plate (1-3), and the column type lifting machine is characterized in that a pulley (1-7) is connected to the bearing flat plate (1-3) (namely the pulley structure of the invention), the pulley (1-7) is sleeved on an upright post (1-8), and a winch (1-4) is connected to the pulley (1-7);

one end of a steel wire rope (1-9) is fixed on a roller of the winch (1-4), then the steel wire rope rounds pulleys (1-10) at the upper ends of the upright posts (1-8) and is fixed in the pulley, and a movable pulley structure is formed.

The column type lifting machine drives the pulley to move through the winch, so that the column type lifting machine is small in occupied space, low in noise and free of environment pollution.

As a preferable scheme, the rear end of the bearing flat plate (1-3) is provided with a guardrail (1-6).

As another preferred scheme, the bearing flat plate (1-3) is of a telescopic structure, and the telescopic end of the bearing flat plate (1-3) is connected with the guardrail (1-6) through a telescopic locking rope (1-5).

As another preferable scheme, the front lower end of the bearing flat plate (1-3) is provided with a foldable safety support (1-2).

As another preferred scheme, the front end of the telescopic end is provided with an approach bridge (1-1), and the safety support (1-2) is arranged at the front lower end of the telescopic end.

As another preferred scheme, the load-bearing flat plate (1-3), the pulley (1-7), the guardrail (1-6) and the winch (1-4) are fixed by screws to form a lifting whole.

As another preferred scheme, the rollers (100) of the pulleys (1-7) slide by taking four corners of the upright posts (1-8) as slideways (see figure 14).

As another preferred scheme, the winch (1-4) adopts a turbine integrated machine (7-1) which integrates a turbine box and a servo motor, a flat key (7-2) is arranged on a shaft of the winch (1-4), a roller assembly (7-3) is arranged on the shaft of the turbine integrated machine (7-1), one end of a steel wire rope (6-22) is arranged in a shaft hole of the turbine integrated machine (7-1), and is propped by an inner hexagonal fastening device (7-4) and locked by a nut (7-4).

As another preferred scheme, a main shaft (7-1-7) of the turbine integrated machine (7-1) is fixed with a turbine (7-1-6) through a flat key (7-1-6), the main shaft (7-1-7) is fixedly connected with an upper shell (7-1-8) and a lower shell (7-1-1) through a bearing (7-1-2), a worm (7-1-3) is meshed with the turbine (7-1-6), the worm (7-1-3) is fixedly connected with a servo motor (7-1-4), and the servo motor (7-1-4) is fixedly connected with the upper shell (7-1-8) and the lower shell (7-1-1) (see figure 7).

As another preferred scheme, the safety support (1-2) comprises a quick bolt (2-1), the quick bolt (2-1) penetrates through a support pipe sleeve (2-2) and a plurality of hole positions of a support leg extension bar (2-3) to be fixed according to different actual heights, the support leg extension bar (2-3) is connected with a foot base (2-4), and the foot base (2-4) is adjusted to be supported with the ground when the safety support (1-2) is fixed.

As another preferred scheme, the load-bearing flat plate (1-3) comprises a middle reinforcing beam assembly (3-19), the middle reinforcing beam assembly (3-19) comprises a first middle beam assembly (3-19-1) on two sides, a second middle beam assembly (3-19-2) is arranged at the rear end of the first middle beam assembly (3-19-1), a middle beam reinforcing pipe (3-19-4) is connected between the first middle beam assemblies (3-19-1) on two sides, and a reinforcing rib supporting angle (3-19-3) is arranged at the corner of the middle beam reinforcing pipe (3-19-4);

the middle reinforcing beam assembly (3-19) is respectively connected with the right support arm assembly (3-1) and the left support arm assembly (3-15) through the connecting pipe assembly III (3-13), the connecting pipe assembly II (3-14) and the connecting pipe assembly I (3-16),

a left telescopic arm assembly (3-12) is arranged in the left support arm assembly (3-15), a plurality of limiting holes are formed in the left telescopic arm assembly (3-12), and the bearing flat plate is fixed by limiting screws (3-2) in different extension sizes;

the first telescopic arm assembly (3-5) and the second telescopic arm assembly (3-4) are respectively arranged in the middle stiffening beam assemblies (3-19); the right telescopic arm assembly (3-3) is arranged in the right support arm assembly (3-1), and the left telescopic arm assembly (3-12) is arranged in the left support arm assembly (3-15); the right telescopic arm assembly part (3-3), the second telescopic arm assembly part (3-4), the first telescopic arm assembly part (3-5) and the front end of the left telescopic arm assembly part (3-12) are fastened with the flat plate front end assembly part (3-9) by screws;

slide way wheels (3-8) arranged on two sides of the approach bridge pedal assembly (3-6) are fixed by a shaft through clamp springs (3-7), and are integrally arranged in a slide way of the flat plate front end assembly (3-9), and the rear end of the approach bridge pedal assembly is limited by an approach bridge flat plate limit (3-10).

As another preferred scheme, rubber pads (3-17) are arranged at the lower ends of the outer sides of the first connecting assembly (3-16) and the third connecting assembly (3-13).

As another preferred scheme, the limiting screw (3-2) adopts a two-section thread mode, when the first section of screw is screwed out and no thread is seen, the screw is stopped to be screwed out, the limiting screw is prevented from falling off, and the left telescopic arm assembly (3-12) can slide in the left support arm assembly (3-15).

As another preferred scheme, half holes are added on the right support arm assembly (3-1) and the left support arm assembly (3-15), when the half holes coincide with the limiting holes, the limiting screws (3-2) are screwed in, and the extending ends are fixed.

As another preferred scheme, the guardrail (1-6) comprises a main cross beam (4-11), the upper end of the middle part of the main cross beam (4-11) is connected with the left (4-12) and right (4-13) lower ends of a longitudinal reinforcing beam, the upper ends of the left (4-12) and right (4-13) longitudinal reinforcing beams are connected with the lower end of the middle part of a guardrail reinforcing cross beam (4-2), two ends of the guardrail reinforcing cross beam (4-2) are connected with the upper end of a guardrail left longitudinal beam (4-6) and the upper end of a guardrail right longitudinal beam (4-14), and reinforcing angles (4-15) are arranged at the lower ends of two sides of the main cross beam (4-11);

a left lacing wire (4-7) is arranged between the upper part of the left longitudinal beam (4-6) of the guardrail and the left rear part of the bearing flat plate (1-3), and a right lacing wire (4-16) is arranged between the right longitudinal beam (4-14) of the guardrail and the right rear part of the bearing flat plate (1-3).

As another preferred scheme, the protecting rope (4-10) (the guardrail has a large gap, so that goods are prevented from falling and intercepted when being stored), penetrates into the hole of the protecting rope fixing bolt (4-9), and then the protecting rope fixing bolt (4-9) is screwed into the protecting rope locking bolt (4-8) in the left longitudinal beam (4-6) of the guardrail to lock the protecting rope (4-10); the protecting rope (4-10) penetrates into the protecting rope locking screw (4-18) and is locked by two nuts (4-17), and after being locked, the protecting rope penetrates into the right longitudinal beam (4-14) of the guardrail, the flat washer (4-19) is locked by the nuts (4-17) and the tightness of the protecting rope (4-10) is adjusted.

As another preferred scheme, the main cross beams (4-11) adopt I-shaped steel structures.

As another preferred scheme, the upper end of the middle part of the guardrail reinforcing beam (4-2) is buckled with an inverted U-shaped reinforcing groove (4-3).

As another preferred scheme, reinforcing rib support angles (4-4) are arranged between the upper ends of the left (4-12) and the right (4-13) of the longitudinal reinforcing beam and the guardrail reinforcing cross beam (4-2).

As another preferred scheme, the left longitudinal beam (4-6) and the right longitudinal beam (4-14) of the guardrail adopt square tubes, and the inner sides of the upper ends of the square tubes are provided with pipe plugs (4-1).

As another preferred scheme, the upright columns (1-8) are arranged on the bottom plate (5-3), upright column reinforcing ribs (5-1) are arranged between the lower parts of the upright columns (1-8) and the bottom plate (5-3), channel steel fixing blocks (5-2) are arranged on the bottom plate (5-3), and the channel steel fixing blocks (5-2) are connected with the base reinforcing channel steel (5-4) through bolt assemblies (5-7);

the upper ends of the upright posts (1-8) are provided with transverse pulley shaft fixing pipes (5-18), pulleys (5-21) are pressed into first shaft sleeves (5-20), installed into pulley fixing shafts (5-19) and fixed and locked by screws (5-23) and upright post pulley pads (5-22).

As another preferred scheme, the upright columns (1-8) adopt upright column square tubes (5-11), and the upper ends of the upright column square tubes (5-11) are connected with upright column sealing plates (5-16) through screws (5-17).

As another preferable scheme, the upright columns (1-8) are provided with a pulley upper limit position limiting part which can be adjusted up and down and fixed.

As another preferred scheme, the tackle upper limit position limiting part comprises a screw (5-8) and a travel switch (6-21) on the tackle, the screw (5-8) is screwed through a threaded hole of a slide limiting block (5-9) to abut against an upright post (1-8), the slide limiting block (5-9) is arranged in a vertical slide (5-10) with a U-shaped cross section, the U-shaped opening end is connected with the upright post (1-8), a vertical strip-shaped opening is formed in an outer vertical plate of the vertical slide (5-10), and the screw (5-8) penetrates through the vertical strip-shaped opening.

The slideway limiting blocks (5-9) slide in the slideways (5-10), when the height is any, the bolts (5-8) are used for fastening (the front ends of the bolts (5-8) are jacked to the upright posts, then the slideway limiting blocks (5-9) are jacked up, then the gaps between the slideway limiting blocks (5-9) and the inner walls of the slideways (5-10) are not clamped, and at the moment, when the pulley ascends, the contact of the stroke switches (6-21) on the pulley stops ascending when the bolts (5-8) are hit.

The screws (5-8) can be arranged at any height for limiting, so that the phenomenon that the collision phenomenon is caused because the goods are stacked too high and the collision phenomenon is caused because the upper highest point is touched in the ascending process without triggering the upper limiting (the heights of the stacked goods are possibly different, the stacked goods are stacked too high, the goods are touched on the ceiling top in the ascending process, the ascending highest height needs to be set by adjusting the sliding block at the moment), and the goods are stored in any height space by fully utilizing the height.

As another preferable scheme, the pulley fixing shaft (5-19) is arranged in a pulley fixing tube (5-18) and is locked by a fixing shaft pad (5-15), a flat washer (5-14), a spring washer (5-13) and a screw (5-12).

As another preferred scheme, the rope (1-5) comprises an upper locking unit (8-3) and a lower locking unit (8-6), the upper locking unit (8-3) is screwed into the nut (8-5), the lower locking unit (8-6) is screwed into the nut (8-5) by pulling a rope, and the screwing size is adjusted; the lower lock (8-6) penetrates through the tensioning fixing seat (8-7), and the tensioning fixing seat (8-7) is fixed with the bearing flat plate (1-3); the upper locking I (8-3) penetrates into the guardrail (1-6) and is fixed and adjusted by a nut (8-1) and a flat washer (8-2).

As another preferred scheme, a winding drum of the winch (1-4) is connected with one end of a steel wire rope (1-9), the other end of the steel wire rope (1-9) is connected with a pulley pulling device (6-23) by bypassing a pulley (1-10) at the upper end of a stand column (1-8), and the pulley pulling device (6-23) is connected and fastened with a pulley (1-7);

one end of a lock tension spring (6-9) is hung on an upper end screw (6-15) at the upper end of the lock hook (6-13), the other end is hung on a lower end screw (1-15), and the screw (1-15) is arranged on the pulley (1-7);

one end of the safety rope (1-11) is fixed on the upper end screw (6-15), the other end of the safety rope passes through the lifting rope device (6-22), and the length of the safety rope (1-11) is adjusted and fixed by the double clamps (6-17);

the upright posts (1-8) are provided with lock limiting grooves matched with the lock hooks (6-13).

As another preferred scheme, the pulley pulling device (6-23) is connected and fastened with the connecting pieces (1-12) on the pulley, and the flat plates (1-13) are arranged below the connecting pieces (1-12).

As another preferred scheme, the double cards (6-17) adopt galvanized double cards.

As another preferred scheme, a safety gap (shown in figure 10) of 5mm is arranged between the lock hooks (6-13) and the upright posts (1-8).

As another preferred scheme, the lock hook (6-13) is adjusted by the safety rope (1-11), a gap is formed between the lock hook and the upright post (1-8) and is arranged outside the lock limiting groove, the lock tension spring (6-9) is in an elongated state at the moment, and the resilience force is smaller than the tension force of the safety rope (1-11).

As another preferred scheme, the steel wire ropes (1-9) are broken, the lifting rope devices (6-22) and the safety ropes (1-11) fall off along the pulley pulling devices (6-23) under the action of gravity, the pulleys (1-7) slide downwards under the action of gravity, and under the condition that the tension of the safety ropes (1-11) is smaller than the resilience force of the lock tension springs (6-9), the lock hooks (6-13) are overlapped with the flat plates (1-13), and the lock hooks (6-13) spring into the lock limiting grooves of the upright columns (1-8) to stop sliding of the pulleys.

Secondly, the pulley pulling device (6-23) is broken, the pulley (1-7) slides under the action of gravity, the safety rope (1-11) cannot bear the weight and is broken, at the moment, under the condition that the lock hook (6-13) only has the resilience force of the lock tension spring (6-9), the lock hook (6-13) is overlapped with the flat plate (1-13), and the lock hook (6-13) bounces into the lock limiting groove of the upright post (1-8) to stop sliding.

In addition, under the action of the resilience tension of the lock tension spring (6-9), the lock hook (6-13) is overlapped with the flat plate (1-13) and enters the lock limiting groove to be overlapped with the limiting groove. At the moment, the lock achieves the safety protection effect.

The invention has the beneficial effects.

As shown in figure 6, the pulley (1-7) has the main bearing function of the front lower pulley roller and the rear upper pulley roller (6-2), and the rear upper pulley roller (6-2) has the function of adjusting the gap and the gap with the upright post is adjusted by the set screw (6-7). The pulley rollers on the two sides mainly play a role in guiding.

Drawings

The invention is further described with reference to the following figures and detailed description. The scope of the invention is not limited to the following expressions.

Fig. 1 is a schematic structural view of a single-column lifter of the present invention.

Fig. 2 is a schematic view of the safety support of the present invention.

Figure 3 is a schematic view of the load bearing panel of the present invention.

Figure 4 is a schematic view of the barrier of the present invention.

Fig. 5 is a schematic view of a column of the present invention.

FIG. 6 is a schematic view of the tackle of the present invention.

Fig. 7 is a schematic diagram of the hoisting of the present invention.

Figure 8 schematic drawing of the tensioning rope of the present invention.

Fig. 9 is a schematic structural view of the lock of the present invention in a normal operating state.

FIG. 10 is a schematic view of the lock during normal operation of the mechanism of the present invention.

Fig. 11 is a schematic structural view of the present invention in the case of a break between the sheave block and the wire rope.

Fig. 12 is a schematic view of the structure of the present invention in the event of a break between the pulley pulling devices.

FIG. 13 is a schematic view of the lock of the present invention as it is activated.

Figure 14 is a view of the trolley rollers in sliding contact with the uprights.

Fig. 15 shows a wire rope fixing method.

Fig. 16 is a schematic view of a trolley roller.

Fig. 17 is a schematic view of a trolley roller adjustment.

Fig. 18 is a schematic view of a slide stopper in use.

Detailed Description

As shown in fig. 1, can be pulled out manually when needed, and is applied to the transition between the lowest part and the ground. The safety support (1-2) is arranged on the bearing flat plate (1-3) and used for supporting the ground when the bearing flat plate is lifted to a certain height and parked for a long time, the bearing flat plate (1-3) can be extended, a tensioning rope (1-5) is needed for adjustment, and the guardrail (1-6) is connected to ensure the stability of four corners of the bearing flat plate (1-3). The bearing flat plate (1-3), the pulley (1-7), the guardrail (1-6) and the winch (1-4) are fixed by screws to form a lifting whole, the pulley (1-7) is sleeved on the upright post (1-8), and the rollers of the pulley (1-7) slide by taking four corners of the upright post (1-8) as slideways. One end of a steel wire rope (1-9) is fixed on a roller of a turbine servo all-in-one machine of a winch (1-4), then the steel wire rope bypasses a pulley (1-10) and is fixed in a pulley to form a movable pulley structure. The winding drum of the winch (1-4) rotates to drive the steel wire rope (1-9) and then drive the pulley (1-7) and the connecting piece thereof to slide up and down along the upright post (1-8).

The foldable safety support (1-2) is arranged at the front lower end of the bearing flat plate (1-3), the guardrail (1-6) is arranged at the rear end of the bearing flat plate (1-3), and the equipment is good in protection, safe and reliable.

As shown in figure 2, the safety support comprises a quick bolt (2-1), the quick bolt (2-1) penetrates through a support pipe sleeve (2-2) and is fixed with a plurality of hole positions of a support leg extension bar (2-3) according to different actual heights, the support leg extension bar (2-3) is connected with a foot base (2-4), and the foot base (2-4) is adjusted to support the ground when the safety support is fixed.

As shown in figure 3, the middle beam assembly piece I (3-19-1), the middle beam assembly piece II (3-19-2), the reinforcing rib supporting angles (3-19-3) and the middle beam reinforcing pipes (3-19-4) are assembled and welded to form the middle reinforcing beam assembly piece (3-19). The middle reinforcing beam assembly (3-19), the right support arm assembly (3-1), the connecting pipe assembly III (3-13), the connecting pipe assembly II (3-14), the left support arm assembly (3-15), the connecting pipe assembly I (3-16) and the rubber pad (3-17) are respectively fixed by bolts. The left telescopic arm assembly (3-12) is arranged in the left support arm assembly (3-15), wherein a plurality of limiting holes are formed in the left telescopic arm assembly (3-12) and the bearing flat plates are fixed by limiting screws (3-2) for different extension sizes, the limiting screws (3-2) adopt a two-section thread mode, when the first section of screws are screwed out, the screwing-out is stopped when no thread is seen, the limiting screws are prevented from falling off, and the left telescopic arm assembly (3-12) can slide in the left support arm assembly (3-15). Because the hole site fixed gear can not be seen, the hole site can not be butted correctly and timely, half holes are added on the right support arm assembly (3-1) and the left support arm assembly (3-15), and when the half holes coincide with the limiting holes, the limiting screws (3-2) are screwed in, so that the fixing effect of the extension end is realized. The first telescopic arm assembly (3-5) and the second telescopic arm assembly (3-4) are respectively arranged in the middle reinforcing beam assembly (3-19). The right telescopic arm assembly (3-3) is arranged in the right support arm assembly (3-1), and the left telescopic arm assembly (3-12) is arranged in the left support arm assembly (3-15). The right telescopic arm assembly (3-3), the second telescopic arm assembly (3-4), the first telescopic arm assembly (3-5) and the front end of the left telescopic arm assembly (3-12) are fastened with the flat plate front end assembly (3-9) by screws. Slide wheels (3-8) arranged on two sides of the approach bridge pedal assembly (3-6) are fixed by a shaft clamp spring (3-7), are integrally arranged in a slide of the flat plate front end assembly (3-9) and hidden in the bearing flat plate when not in work, the rear end of the approach bridge pedal assembly is limited by an approach bridge flat plate (3-10), and the front end of the approach bridge pedal assembly is manually pulled out to be attached to the ground to form a certain included angle to play a role in transitional connection when in work. Rubber pads (3-17) are fixed at the lower end of the platform to play a role in buffering, and the bearing flat plate can be prevented from being scraped and bumped with the ground below.

The bearing flat plate can adopt a bolt connection structure for thin-wall section bars, and has the advantages of convenient transportation, simple and easy installation, light overall weight and capability of improving the load capacity. The bearing flat plate has an extension function, so that the space is greatly saved, and the storage range of different goods is not limited. The dull and stereotyped front end of bearing has hidden approach bridge function, realizes transition between the perfect and ground of minimum, and non-minimum can be at any time manual income dull and stereotyped inside. The front end safety support can be put down when the bearing platform is fixed at a certain height for a long time, and the supporting legs can be adjusted in multiple gears and are suitable for different heights in a normal use state. The two sides of the bearing flat plate are respectively provided with a tensioning device which is fixed at the front ends of the guardrail and the bearing flat plate, and the tensioning devices are adjusted by adopting standard part turnbuckles, so that the stress at the front end of the bearing flat plate is effectively shared by the mechanical structure, and the bearing flat plate can be uniformly stressed even if the front end of the bearing flat plate is overloaded.

As shown in figure 4, the main cross beam (4-11) adopts an I-shaped steel structure, and is welded with a guardrail reinforcing cross beam (4-2), a reinforcing groove (4-3), a reinforcing rib supporting angle (4-4), a guardrail left longitudinal beam (4-6), a longitudinal reinforcing beam left (4-12), a longitudinal reinforcing beam right (4-13) and a guardrail right longitudinal beam (4-14) to form a guardrail main body through a connecting reinforcing angle (4-15). The pipe plug (4-1) is arranged in the square pipe of the left longitudinal beam (4-6) and the right longitudinal beam (4-14) of the guardrail. The left (4-7) of the fixed tie bar is connected to the left longitudinal beam (4-6) of the guardrail by a screw (4-5). The right (4-16) of the fixed tie bar is connected to the right longitudinal beam (4-14) of the guardrail by a screw (4-5). One end of the protecting rope (4-10) penetrates into the protecting rope fixing bolt (4-9) hole, then the protecting rope fixing bolt (4-9) is screwed into the protecting rope locking bolt (4-8) to lock the protecting rope (4-10), and the protecting rope locking bolt (4-8) is arranged on the left longitudinal beam (4-6) of the guardrail.

The other end of the protecting rope (4-10) penetrates into a protecting rope locking screw (4-18), two ends of the protecting rope locking screw (4-18) are locked on the guardrail right longitudinal beam (4-14) by two nuts (4-17), and a flat washer (4-19) is arranged between the nut (4-17) and the guardrail right longitudinal beam (4-14).

The main beam of the guardrail can adopt standard H-shaped steel, and the bending moment, the pressure load and the deflection load are superior to other structures.

As shown in fig. 5, the upright post reinforcing ribs (5-1), the channel steel fixing blocks (5-2), the bottom plate (5-3), the switch slide ways (5-10), the upright post square tubes (5-11) and the pulley shaft fixing tubes (5-18) are assembled and welded into an upright post assembly. The base reinforcing channel steel (5-4) is combined by bolts (5-7). The slide way limiting blocks (5-9) are arranged in the switch slide ways (5-10) and locked at proper positions by screws (5-8). The upright post close plates (5-16) are fixed by screws (5-17). The pulleys (5-21) are pressed into the first shaft sleeves (5-20), are arranged into the pulley fixing shafts (5-19) and are fixedly locked by the screws (5-23) and the upright pulley pads (5-22). The pulley fixing shaft (5-19) is arranged in the pulley fixing tube (5-18) and is locked by a fixing shaft pad (5-15), a flat washer (5-14), a spring washer (5-13) and a screw (5-12).

As shown in figure 6, the pulley roller (6-2) is pressed into the second shaft sleeve (6-3) to penetrate through the pulley roller shaft (6-4) and fixed on the pulley assembly (6-1) and the clearance is adjusted by the hexagon socket flat end tightening (6-7). The cover (6-8), the cover II (6-29) and the wire groove (6-32) are fixed on the pulley assembly (6-1) by screws (6-31). The turbine box limiting seat (6-28) and the distribution box (6-30) are fixed on the pulley assembly (6-1) by screws (6-28). The over-coil (6-27) penetrates into the pulley assembly (6-1). The pipe plug (6-26) is arranged in the pulley assembly (6-1). The travel switch device (6-21) is fixed on the pulley assembly (6-1) through a screw (6-18), a spring washer (6-19) and a flat washer (6-20). The latch hook (6-13) and the flat washer (6-12) penetrate through the lock fixing shaft (6-11) and are fixed on two sides of the pulley assembly (6-1) and are limited by the shaft clamp spring (6-10). One end of the lock tension spring (6-9) is fixed on the pulley assembly (6-1) by a screw (6-15), and the other end is fixed on the lock hook (6-13). The press-fit end of the safety rope device (6-17) is fixed on the lifting rope device (6-22), the other end of the safety rope device is fixed on the lock hook (6-13) through a screw (6-15), and the gap between the lock hook (6-13) and the upright column square tube (figure 5, 5-11) is adjusted through the galvanized double clamp (6-17). One end of the pulley pulling device (6-23) is a threaded end, a threaded hole is formed in the pulley assembly (6-1) corresponding to the threaded end, and the other end of the pulley pulling device (6-23) is connected with the pulley assembly (6-1) through a flat washer (6-24) and a nut (6-25). The lifting rope device (6-22) penetrates into the pulley pulling device (6-23).

As shown in figure 7, the turbine integrated machine (7-1) is integrated by a servo motor, a turbine and a worm speed reducer, has small occupied space and attractive appearance, and the turbine and the worm have a mechanical self-locking function. A flat key (7-2) is arranged on the shaft, and a roller assembly (7-3) is arranged on the shaft of the turbine all-in-one machine (7-1). A steel wire rope (as shown in figure 6, one end of the steel wire rope 6-22) is arranged in a shaft hole of the turbine all-in-one machine (7-1), is propped by an inner hexagonal fastening (7-4) and is locked by a nut (7-4).

The winding part is composed of a turbine servo integrated machine (the shell is formed in one step by aluminum die casting, and a turbine box and a servo motor are integrated inside the turbine servo integrated machine) and a roller assembly, and then one end of a steel wire rope is fixed by the roller assembly. The winding part is arranged on the sliding body, a steel wire rope wound from the winding roller assembly penetrates through the upper pulley of the upright post and then is fixed on the sliding body, the motor rotates to drive the winding drum, and the roller winds the steel wire rope to enable the sliding body and the related connecting piece to rise, fall or stop. The structure forms the moving process of the movable pulley, has the function of saving half force, prolongs the service life of the steel wire rope, and reasonably utilizes the power of the servo motor. The servo motor is adopted for control, and the functions of speed adjustment, accurate ascending and descending are achieved. The speed reducer adopts a worm wheel and worm structure, the mechanical self-locking advantage of the worm wheel and the worm is effectively utilized, the condition that the sliding body and the bearing flat plate slide down when the motor breaks down is avoided, and the safety of the machine is further enhanced.

As shown in figure 8, a first (8-3) screw-in nut (8-5) is locked on the pull rope (or a second (8-4) screw-in nut is locked on the pull rope and is used when the bearing flat plate has different sizes), and the screw-in size is adjusted. The lower part of the pull rope is locked (8-6) and screwed into the nut (8-5), and the screwing size is adjusted. The lower lock (8-6) of the pull rope penetrates through the tensioning fixed seat (8-7), and the tensioning fixed seat is fixed with the bearing flat plate (as shown in figure 1). A first locking part (8-3) on the pull rope (or a second locking part (8-4) on the pull rope is used when the bearing flat plate is different in size) penetrates into the guardrail (shown in figure 1) and is fixed and adjusted by a nut (8-1) and a flat washer (8-2).

The pulley is installed on four sides gyro wheel and is realized the decline process that rises as the slide with stand four edges and corners. The pulley rollers are distributed with two rollers on one surface. The rollers are distributed according to a parallelogram stress principle, when the column type lifting machine is stressed, the upper roller at the rear end and the lower roller at the front end are stressed greatly, and the rib plates of the sliding bodies are supported between the rollers. Because under the bearing condition, the bearing platform of the column type lifter belongs to the cantilever, the upper roller at the rear end is larger than other rollers, and the lower roller at the front end is smaller than other rollers, the front end of the column type lifter slightly upwarps when no load exists. The rear end and the adjacent side are provided with adjustable roller structures which can be finely adjusted, so that the error in the machining process is solved, and the upper gap and the lower gap of the pulley are uniform. The safety lock structure is adopted inside, the lock hook is downward in normal work, the tension spring is fixed at the lower side, the tension spring reaches the maximum tension position, the upper portion is connected with the lifting rope device through the safety rope, the length of the safety rope can be adjusted through the galvanized double clamps, and a gap of 5mm between the downward lock hook and the stand column is guaranteed. Once lifting rope, coaster draw when device department has the fracture condition, the safety rope will drop, and the latch hook reaches the horizontality under the effect of extension spring return force and pins in the spring-in stand recess, reaches safety protection's effect.

As shown in fig. 9, the winch (1-4) drives the steel wire rope (1-9) to pass through the vertical column (1-8) and the pulley (1-10) to be connected with the pulley pulling device (6-23), the pulley pulling device (6-23) is connected and fastened with the connecting piece (1-12) on the pulley, and the winch rolls the steel wire rope to realize the up-and-down movement of the pulley (1-7) and the related part thereof. The locking hooks (6-13) fix the screws (6-15), one end of the lock tension spring (6-9) is hung on the screws (6-15), and the other end is hung on the screws (1-15). The safety rope (1-11) is fixed on the screw (6-15), the other end of the safety rope passes through the lifting rope device (6-22), the length of the safety rope (1-11) is adjusted and fixed by the galvanized double clamps (6-17), and a safety gap of about 5mm is formed between the lock hook (6-13) and the upright post (1-8).

As shown in fig. 10, the locking hook (6-13) has a gap with the upright post (1-8) at the outer side of the locking limit groove under the adjustment of the safety rope (1-11), at this time, the lock tension spring (6-9) is in an elongated state, and the resilience force is smaller than the tension force of the safety rope (1-11).

As shown in fig. 11, the steel wire ropes (1-9) are broken, the lifting rope devices (6-22) and the safety ropes (1-11) fall off along the pulley pulling devices (6-23) under the action of gravity, the pulleys (1-7) slide downwards under the action of gravity, at the moment, under the condition that the tension of the safety ropes (1-11) is smaller than the resilience force of the lock tension springs (6-9), the lower end surfaces of the outer sides of the lock hooks (6-13) are overlapped with the upper end surfaces of the flat plates (1-13), and the lock hooks (6-13) spring into the lock limiting grooves of the upright posts (1-8) to stop sliding downwards.

As shown in figure 12, the pulley pulling device (6-23) is broken, the pulley (1-7) slides down under the action of gravity, the safety rope (1-11) cannot bear the weight and is instantaneously broken, at the moment, under the condition that the lock hook (6-13) only has the resilience force of the lock tension spring (6-9), the lower end face of the outer side of the lock hook (6-13) is overlapped with the upper end face of the flat plate (1-13), and the lock hook (6-13) bounces into the lock limiting groove of the upright post (1-8) to stop sliding down.

As shown in fig. 13, under the action of the resilience tension of the lock tension spring (6-9), the lock hook (6-13) is overlapped with the upper end face of the flat plate (1-13) and enters the lock limiting groove (1-14) to be overlapped with the bottom of the limiting groove. At the moment, the lock achieves the safety protection effect.

When the winch and the sliding body are randomly connected and break or fall off in the process of the movement or stop of the sliding body dragged by the steel wire rope, the safety lock is triggered when the sliding body slides down quickly, and the safety protection effect is achieved.

It should be understood that the detailed description of the present invention is only for illustrating the present invention and is not limited by the technical solutions described in the embodiments of the present invention, and those skilled in the art should understand that the present invention can be modified or substituted equally to achieve the same technical effects; as long as the use requirements are met, the method is within the protection scope of the invention.

Claims

1. A pulley structure comprises a pulley assembly (6-1), a shaft sleeve (6-3) is arranged on a pulley roller, a pulley roller shaft (6-4) is arranged in the shaft sleeve (6-3), and the pulley roller shaft (6-4) is arranged on the pulley assembly (6-1);

a pulley (1-7) is provided with a front-end lower pulley roller and a rear-end upper pulley roller (6-2), the rear-end upper pulley roller (6-2) is pressed into a shaft sleeve (6-3) and penetrates through a pulley roller shaft (6-4) to be fixed on a pulley assembly (6-1), and a gap adjusting jackscrew (6-7) is arranged on the pulley assembly (6-1) corresponding to the pulley roller shaft (6-4);

side pulley rollers are arranged on two sides of the pulleys (1-7);

flat washers (6-12) are arranged on the lock hooks (6-13), lock fixing shafts (6-11) penetrate through the flat washers (6-12), shaft clamp springs (6-10) for limiting are arranged on two sides of each lock fixing shaft (6-11), and the lock hooks (6-13) are fixed on the pulley assembly (6-1);

one end of a steel wire rope (1-9) is fixed on the lifting rope device (6-22), the other end (6-16) is fixed on the lock hook (6-13) through a screw (6-15), and the gap between the lock hook (6-13) and the upright column square tube (5-11) is adjusted through a galvanized double clamp (6-17);

the pulley structure is applied to a column type lifting machine, the column type lifting machine comprises a bearing flat plate (1-3), a pulley (1-7) is connected to the bearing flat plate (1-3), the pulley (1-7) is sleeved on an upright post (1-8), and a winch (1-4) is connected to the pulley (1-7);

one end of a steel wire rope (1-9) is fixed on a roller of a winch (1-4), then bypasses a pulley (1-10) at the upper end of an upright post (1-8) and is fixed in a pulley to form a movable pulley structure;

the rear end of the bearing flat plate (1-3) is provided with a guardrail (1-6);

the bearing flat plate (1-3) is of a telescopic structure, and the telescopic end of the bearing flat plate (1-3) is connected with the guardrail (1-6) through a telescopic locking rope (1-5);

the front lower end of the bearing flat plate (1-3) is provided with a foldable safety support (1-2);

the front end of the telescopic end is provided with an approach bridge (1-1), and a safety support (1-2) is arranged at the front lower end of the telescopic end;

when needed, the material is manually pulled out and applied to the transition between the lowest part and the ground; the safety support (1-2) is arranged on the bearing flat plate (1-3) and used for supporting the ground when the bearing flat plate (1-3) is lifted to a certain height and parked for a long time, the bearing flat plate (1-3) can be extended, a tensioning rope (1-5) is needed for adjustment, and the guardrail (1-6) is connected to ensure the stability of four corners of the bearing flat plate (1-3); the bearing flat plate (1-3), the pulley (1-7), the guardrail (1-6) and the winch (1-4) are fixed by screws to form a lifting whole, the pulley (1-7) is sleeved on the upright post (1-8), and the rollers of the pulley (1-7) slide by taking four corners of the upright post (1-8) as slideways; one end of a steel wire rope (1-9) is fixed on a roller of a turbine servo all-in-one machine of a winch (1-4), then bypasses a pulley (1-10) and is fixed in a pulley to form a movable pulley structure; a winding drum of the winch (1-4) rotates to drive the steel wire rope (1-9) and then drives the pulley (1-7) and the connecting piece thereof to slide up and down along the upright post (1-8);

the rollers (100) of the pulleys (1-7) slide by taking four corners of the upright posts (1-8) as slideways;

the winch (1-4) adopts a turbine integrated machine (7-1) which integrates a turbine box and a servo motor together, a flat key (7-2) is arranged on a shaft of the winch (1-4), a roller assembly (7-3) is arranged on the shaft of the turbine integrated machine (7-1), one end of a steel wire rope (6-22) is arranged in a shaft hole of the turbine integrated machine (7-1), is propped by an inner hexagonal fastening (7-4) and is locked by a nut (7-4);

a main shaft (7-1-7) of the turbine integrated machine (7-I) is fixed with a turbine (7-1-6) through a flat key (7-1-6), the main shaft (7-1-7) is fixedly connected with an upper shell (7-1-8) and a lower shell (7-1-1) through a bearing (7-1-2), a worm (7-1-3) is meshed with the turbine (7-1-6), the worm (7-1-3) is fixedly connected with a servo motor (7-1-4), and the servo motor (7-1-4) is fixed on the upper shell (7-1-8) and the lower shell (7-1-1);

the safety support (1-2) comprises a quick bolt (2-1), the quick bolt (2-1) penetrates through the support pipe sleeve (2-2) and is fixed with a plurality of hole sites of the support leg extension bar (2-3) according to actual different heights, the support leg extension bar (2-3) is connected with the foot base (2-4), and the foot base (2-4) is adjusted to support the ground when the safety support (1-2) is fixed;

the bearing flat plate (1-3) comprises a middle reinforcing beam assembly (3-19), the middle reinforcing beam assembly (3-19) comprises two middle beam assemblies (3-19-1) on two sides, a middle beam assembly II (3-19-2) is arranged at the rear end of each middle beam assembly (3-19-1), a middle beam reinforcing pipe (3-19-4) is connected between the two middle beam assemblies I (3-19-1) on two sides, and a reinforcing rib supporting angle (3-19-3) is arranged at the corner of each middle beam reinforcing pipe (3-19-4); the middle stiffening beam assembly (3-19) is respectively connected with the right support arm assembly (3-1) and the left support arm assembly (3-15) through a connecting pipe assembly III (3-13), a connecting pipe assembly II (3-14) and a connecting pipe assembly I (3-16), a left telescopic arm assembly (3-12) is arranged in the left support arm assembly (3-15), a plurality of limiting holes are formed in the left telescopic arm assembly (3-12), and the bearing flat plates are fixed with different extension sizes through limiting screws (3-2);

the first telescopic arm assembly (3-5) and the second telescopic arm assembly (3-4) are respectively arranged in the middle stiffening beam assemblies (3-19); the right telescopic arm assembly (3-3) is arranged in the right support arm assembly (3-1) and the left telescopic arm assembly (3-12) is arranged in the left support arm assembly (3-15); the right telescopic arm assembly part (3-3), the second telescopic arm assembly part (3-4), the first telescopic arm assembly part (3-5) and the front end of the left telescopic arm assembly part (3-12) are fastened with the flat plate front end assembly part (3-9) by screws;

slideway wheels (3-8) arranged on two sides of the approach bridge pedal assembly (3-6) are fixed by a shaft through snap springs (3-7), and are integrally arranged in a slideway of the flat plate front end assembly (3-9), and the rear end of the approach bridge pedal assembly is limited by an approach bridge flat plate limit (3-10);

the middle beam assembly I (3-19-1), the middle beam assembly II (3-19-2), the reinforcing rib supporting angles (3-19-3) and the middle beam reinforcing pipes (3-19-4) are assembled and welded to form a middle reinforcing beam assembly (3-19); the middle reinforcing beam assembly (3-19), the right support arm assembly (3-1), the connecting pipe assembly III (3-13), the connecting pipe assembly II (3-14), the left support arm assembly (3-15), the connecting pipe assembly I (3-16) and the rubber pad (3-17) are respectively fixed by bolts; the left telescopic arm assembly (3-12) is arranged in the left support arm assembly (3-15), wherein a plurality of limiting holes are formed in the left telescopic arm assembly (3-12), the bearing flat plate is fixed by limiting screws (3-2) for different extension sizes, the limiting screws (3-2) adopt a two-section thread mode, when the first section of screw is screwed out, the screw is stopped to be screwed out when no thread is seen, the limiting screws are prevented from falling off, and the left telescopic arm assembly (3-12) can slide in the left support arm assembly (3-15); the hole position fixing gear cannot be seen, the hole position cannot be butted correctly and timely, half holes are added on the right support arm assembly (3-1) and the left support arm assembly (3-15), and when the half holes are overlapped with the limiting holes, the limiting screws (3-2) are screwed in, so that the fixing effect of the extension end is realized; the first telescopic arm assembly (3-5) and the second telescopic arm assembly (3-4) are respectively arranged in the middle stiffening beam assemblies (3-19); the right telescopic arm assembly (3-3) is arranged in the right support arm assembly (3-1) and the left telescopic arm assembly (3-12) is arranged in the left support arm assembly (3-15); the right telescopic arm assembly part (3-3), the second telescopic arm assembly part (3-4), the first telescopic arm assembly part (3-5) and the front end of the left telescopic arm assembly part (3-12) are fastened with the flat plate front end assembly part (3-9) by screws; slide way wheels (3-8) arranged on two sides of the approach bridge pedal assembly (3-6) are fixed by a shaft clamp spring (3-7), are integrally arranged in a slide way of the assembly (3-9) at the front end of the flat plate, are hidden inside the bearing flat plate when not in work, are limited at the rear end by an approach bridge flat plate limit (3-10), and are manually pulled out to form a certain included angle with the ground when in work so as to play a role of transitional connection; rubber pads (3-17) are fixed at the lower end of the platform to play a role in buffering, and the bearing flat plate can be prevented from being scraped and bumped with the ground below;

the protecting rope (4-10) penetrates into the hole of the protecting rope fixing bolt (4-9), and then the protecting rope fixing bolt (4-9) is screwed into the protecting rope locking bolt (4-8) in the left longitudinal beam (4-6) of the guardrail to lock the protecting rope (4-10); the protecting rope (4-10) penetrates into a protecting rope locking screw (4-18) and is locked by two nuts (4-17), and after being locked, the protecting rope penetrates into a guardrail right longitudinal beam (4-14) and a flat washer (4-19) and is locked by the nuts (4-17) and the tightness of the protecting rope (4-10) is adjusted;

the pulley upper limit position limiting part comprises a screw (5-8) and a travel switch (6-21) on the pulley, the screw (5-8) is screwed through a threaded hole of a slide limiting block (5-9) to be abutted against an upright post (1-8), the slide limiting block (5-9) is arranged in a vertical slide (5-10) with a U-shaped cross section, a U-shaped opening end is connected with the upright post (1-8), a vertical strip-shaped opening is arranged on an outer vertical plate of the vertical slide (5-10), and the screw (5-8) penetrates through the vertical strip-shaped opening;

a pulley roller (6-2) press-in shaft sleeve (6-3) penetrates through a pulley roller shaft (6-4) and is fixed on a pulley assembly (6-1) and a clearance is adjusted by an inner hexagonal flat end tightening device (6-7); the cover (6-8), the cover II (6-29) and the wire groove (6-32) are fixed on the pulley assembly (6-1) by screws (6-31); the turbine box limiting seat (6-28) and the distribution box (6-30) are fixed on the pulley assembly (6-1) by screws (6-28); the coil (6-27) penetrates into the pulley assembly (6-1); the pipe plug (6-26) is arranged in the pulley assembly (6-1); the travel switch device (6-21) is fixed on the pulley assembly (6-1) through a screw (6-18), a spring washer (6-19) and a flat washer (6-20);

the latch hook (6-13) and the flat washer (6-12) penetrate through the lock fixing shaft (6-11) and are fixed on two sides of the pulley assembly (6-1) and are limited by the shaft clamp spring (6-10); one end of a lock tension spring (6-9) is fixed on the pulley assembly (6-1) by a screw (6-15), and the other end is fixed on a lock hook (6-13); the press-fit end of the safety rope device (6-17) is fixed on the lifting rope device (6-22), the other end of the safety rope device is fixed on the lock hook (6-13) through a screw (6-15), and the gap between the lock hook (6-13) and the upright column square tube (5-11) is adjusted through the galvanized double clamp (6-17); one end of the pulley pulling device (6-23) is a threaded end, a threaded hole is formed in the pulley assembly (6-1) corresponding to the threaded end, and the other end of the pulley pulling device (6-23) is connected with the pulley assembly (6-1) through a flat washer (6-24) and a nut (6-25);

the lifting rope device (6-22) penetrates into the pulley pulling device (6-23);

the rope (1-5) comprises an upper locking unit (8-3) and a lower locking unit (8-6), the upper locking unit (8-3) is screwed into the basket nut (8-5), the lower locking unit (8-6) is screwed into the basket nut (8-5) to adjust the screwing size; the lower lock (8-6) penetrates through the tensioning fixing seat (8-7), and the tensioning fixing seat (8-7) is fixed with the bearing flat plate (1-3); an upper locking I (8-3) penetrates into the guardrail (1-6) and is fixed and adjusted by a nut (8-1) and a flat washer (8-2);

the winding drum of the winch (1-4) is connected with one end of a steel wire rope (1-9), the other end of the steel wire rope (1-9) is connected with a pulley pulling device (6-23) by bypassing a pulley (1-10) at the upper end of an upright post (1-8), and the pulley pulling device (6-23) is connected and fastened with a pulley (1-7); one end of a lock tension spring (6-9) is hung on an upper end screw (6-15) at the upper end of the lock hook (6-13), the other end is hung on a lower end screw (1-15), and the screw (1-15) is arranged on the pulley (1-7); one end of the safety rope (1-11) is fixed on the upper end screw (6-15), the other end of the safety rope passes through the lifting rope device (6-22), and the length of the safety rope (1-11) is adjusted and fixed by the double clamps (6-17); the upright posts (1-8) are provided with lock limiting grooves matched with the lock hooks (6-13).