Lifting column of platform safety device, fixing column of platform safety device and platform safety device

Abstract

The utility model belongs to the technical field of platform protection equipment, and particularly provides a lifting column of a platform safety device, a fixing column of the platform safety device and the platform safety device. The lifting column comprises a lifting column body, at least two vertically-arranged guide wheel sets are arranged on one side of the lower section of the lifting column body, and each guide wheel set comprises at least two guide wheels which are arranged in a left-right spaced mode and used for vertically guiding and moving along guide rails on a fixing column. The fixing column comprises a fixing column body, a guide rail used for being matched with a guide wheel at the bottom of the lifting column in a guiding mode is arranged on the fixing column, and the guide rail is provided with an installation face attached to the lifting column. The platform safety device comprises the fixed column and a lifting column. Compared with the prior art, the guide wheels and the guide rails are better in reliability, and generally small dust cannot affect crossing of the guide wheels. The applicant performs an environmental test in a laboratory, the service life of the wheel rail structure exceeds the service life of equipment, and the wheel rail structure has good popularization and application prospects.

Description

Technical Field

[0001] The utility model belongs to the technical field of platform protection equipment, and particularly relates to a lifting column of a platform safety device, a fixing column of the platform safety device and a platform safety device. Background Art

[0002] The existing railway platforms are generally open platforms. Some passengers have weak safety awareness and often walk across the platform safety line. Once a passenger accidentally falls from the platform, it may cause a serious safety accident. The need to configure a safety protection system on the railway platform is imminent.

[0003] Unlike subway platform protection doors, the parking position of high-speed rail or ordinary passenger trains is difficult to control accurately, which requires the safety protection system to open the farther passenger passage as much as possible when opening the door. The applicant's authorization announcement number is the patent with application publication number CN305782671S and CN211280997U, which provides a lifting platform safety door (platform safety device). The lifting device of the lifting device safety door includes a fixed column and a lifting column. The fixed column can be installed on the platform. The lifting column can be lifted up and down relative to the fixed column, and the lifting column is also provided with a secondary lifting module. The secondary lifting module includes a number of movable sliders, which are used to connect the protective belt. When the lifting column is lifted, the slider rises synchronously, driving the protective belt to open the passenger passage, which can meet the safety protection needs of the railway platform.

[0004] The platform safety device designed by the applicant has been used in many high-speed railway stations. The lifting and lowering motion is transmitted between the fixed column and the lifting column through the screw module. The lifting column is fixedly connected to the slider of the screw module and moves up and down with the slider. However, in actual application, since the railway platform is an open environment, impurities such as wind, sand, rain and snow are easy to enter the screw module. In addition, the temperature difference between winter and summer is large, and the thermal expansion coefficients of various parts of the screw module are different. Long-term use causes the module to get stuck and damaged. In addition, according to the applicant's understanding, there are also solutions in the prior art that use ball sliders and guide rails to guide the lifting column. However, when impurities enter the ball slider, it is also easy to get stuck and other problems, and the reliability is insufficient. Utility Model Content

[0005] The purpose of the utility model is to provide a lifting column of a platform safety device to solve the technical problem that the platform safety device in the form of a screw module or a ball slider in the prior art is not reliable enough. The purpose of the utility model is also to provide a fixed column of the platform safety device to solve the same technical problem as above. The purpose of the utility model is also to provide a platform safety device to solve the same technical problem as above.

[0006] In order to achieve the above-mentioned purpose, the technical solution of the lifting column of the platform safety device provided by the utility model is:

[0007] A lifting device for a platform safety device comprises a lifting column body, wherein one side of the lower section of the lifting column body is provided with at least two groups of guide wheel groups arranged vertically, each group of guide wheel groups comprises at least two guide wheels arranged at intervals on the left and right and respectively used for guiding and moving up and down along a guide rail on a fixed column.

[0008] As a further improvement, at least two groups of guide wheel assemblies include two inner guide wheels respectively used for moving along the inner sides of two guide rails arranged in parallel and spaced apart from each other on the left and right sides.

[0009] As a further improvement, at least one set of guide wheel assemblies further comprises at least one clamping guide wheel for moving along the outer side of at least one guide rail.

[0010] As a further improvement, the positions of the clamping guide wheel and the two upper and lower adjacent inner guide wheels are staggered in a corresponding manner.

[0011] As a further improvement, at least two groups of guide wheel assemblies include two outer guide wheels respectively used for moving along the outer sides of two guide rails arranged in parallel and spaced apart on the left and right sides.

[0012] As a further improvement, at least one set of guide wheel assemblies further comprises at least one clamping guide wheel for moving along the inner side of at least one guide rail.

[0013] As a further improvement, the positions of the clamping guide wheel and the two upper and lower adjacent outer guide wheels are staggered accordingly.

[0014] As a further improvement, the guide wheel groups are arranged closely above and below.

[0015] As a further improvement, a dust cleaning device for removing dust from the guide rail surface is also provided on the lifting column body.

[0016] As a further improvement, the dust cleaning device is provided with a lubricating felt for scraping the guide rail surface.

[0017] As a further improvement, the guide wheel is provided with a limiting groove or a limiting protrusion for front and rear limiting cooperation with the guide rail on the fixed column.

[0018] As a further improvement, the limiting groove is a V-shaped groove, and the limiting protrusion is a V-shaped protrusion.

[0019] As a further improvement, a guide wheel mounting seat is also provided on the lifting column body, and the guide wheel is mounted on the guide wheel mounting seat through an eccentric shaft, so that the gap between the guide wheel and the guide rail can be changed by adjusting the rotation of the eccentric shaft.

[0020] As a further improvement, a guide wheel mounting seat is also provided on the lifting column body, and the guide wheel is mounted on the guide wheel mounting seat. The guide wheel mounting seat is provided with a bolt hole for passing a fastening bolt, and the diameter of the bolt hole is larger than the diameter of the fastening bolt, so that the gap between the guide wheel and the guide rail can be changed by moving and adjusting the fastening bolt in the bolt hole, and positioning pin holes corresponding to each other for passing the positioning pins are also provided between the lifting column body and the guide wheel mounting seat.

[0021] As a further improvement, the outer periphery of the guide wheel is provided with a wear-resistant layer or the guide wheel is made of a wear-resistant material.

[0022] The beneficial effects of the utility model are as follows: the utility model improves the lifting column of the platform installation device, and belongs to an improved invention. In the process of lifting the lifting column up and down, the guide wheel group cooperates with the guide rail on the fixed column to guide up and down. Compared with the prior art, the reliability of the guide wheel and the guide rail is better, and generally smaller dust will not affect the guide wheel from crossing. In the laboratory, the applicant conducted environmental tests such as 70°C high temperature, -40°C low temperature, and rain test, and the lifting and lowering was 300,000 times without any fault. In this way, according to the average frequency of 40 times of lifting and lowering of each platform per day, the platform can be used for 20 years, which has exceeded the service life of the equipment.

[0023] In order to achieve the above-mentioned purpose, the technical solution of the fixed column of the platform safety device provided by the utility model is:

[0024] A fixed column of a platform safety device comprises a fixed column body, on which a guide rail for guiding and cooperating with a guide wheel set arranged on a lifting column is arranged, and the guide rail has a mounting surface mounted on the fixed column.

[0025] As a further improvement, the guide rail includes two rails which are arranged in parallel and spaced apart from each other on the left and right sides.

[0026] The beneficial effects of the utility model are as follows: the utility model improves the fixed column of the platform installation device. In the process of the lifting column lifting up and down, the guide wheel group cooperates with the guide rail on the fixed column to play the role of up and down guidance. Compared with the prior art, the reliability of the guide wheel and the guide rail is better, and generally smaller dust will not affect the guide wheel from crossing. In the laboratory, the applicant conducted environmental tests such as 70°C high temperature, -40°C low temperature, and rain test, and the up and down lifting was 300,000 times without any fault. In this way, according to the average frequency of 40 times of lifting and lowering of each platform per day, the platform can be used for 20 years, which has exceeded the service life of the equipment.

[0027] In order to achieve the above-mentioned purpose, the technical solution of the platform safety device provided by the utility model is:

[0028] A platform safety device comprises a fixed column and a lifting column, the lifting column comprises a lifting column body, the fixed column comprises a fixed column body, one side of the lower section of the lifting column body is provided with at least two groups of guide wheel groups arranged vertically, each group of guide wheel groups comprises at least two guide wheels arranged at intervals on the left and right and respectively used for guiding and moving up and down along a guide rail on the fixed column, the fixed column body is provided with a guide rail for guiding and cooperating with the guide wheel group arranged on the lifting column, and the guide rail has a mounting surface mounted on the fixed column.

[0029] As a further improvement, the guide rails include two rails spaced apart in parallel on the left and right sides, and at least two guide wheel groups include two inner guide wheels respectively used for moving along the inner sides of the two guide rails spaced apart in parallel on the left and right sides.

[0030] As a further improvement, at least one set of guide wheel assemblies further comprises at least one clamping guide wheel for moving along the outer side of at least one guide rail.

[0031] As a further improvement, the positions of the clamping guide wheel and the two upper and lower adjacent inner guide wheels are staggered in a corresponding manner.

[0032] As a further improvement, the guide rails include two rails spaced apart in parallel on the left and right sides, and at least two guide wheel groups include two outer guide wheels respectively used for moving along the outer sides of the two guide rails spaced apart in parallel on the left and right sides.

[0033] As a further improvement, at least one set of guide wheel assemblies further comprises at least one clamping guide wheel for moving along the inner side of at least one guide rail.

[0034] As a further improvement, the positions of the clamping guide wheel and the two upper and lower adjacent outer guide wheels are staggered accordingly.

[0035] As a further improvement, the guide wheel groups are arranged closely above and below.

[0036] As a further improvement, a dust cleaning device for removing dust from the guide rail surface is also provided on the lifting column body.

[0037] As a further improvement, the dust cleaning device is provided with a lubricating felt for scraping the guide rail surface.

[0038] As a further improvement, the guide wheel is provided with a limiting groove or a limiting protrusion for front and rear limiting cooperation with the guide rail on the fixed column.

[0039] As a further improvement, the limiting groove is a V-shaped groove, and the limiting protrusion is a V-shaped protrusion.

[0040] As a further improvement, a guide wheel mounting seat is also provided on the lifting column body, and the guide wheel is mounted on the guide wheel mounting seat through an eccentric shaft, so that the gap between the guide wheel and the guide rail can be changed by adjusting the rotation of the eccentric shaft.

[0041] As a further improvement, a guide wheel mounting seat is also provided on the lifting column body, and the guide wheel is mounted on the guide wheel mounting seat. The guide wheel mounting seat is provided with a bolt hole for passing a fastening bolt, and the diameter of the bolt hole is larger than the diameter of the fastening bolt, so that the gap between the guide wheel and the guide rail can be changed by moving and adjusting the fastening bolt in the bolt hole, and positioning pin holes corresponding to each other for passing the positioning pins are also provided between the lifting column body and the guide wheel mounting seat.

[0042] As a further improvement, the outer periphery of the guide wheel is provided with a wear-resistant layer or the guide wheel is made of a wear-resistant material.

[0043] The beneficial effects of the utility model are as follows: the utility model improves the lifting column of the platform installation device, and belongs to an improved invention. In the process of lifting the lifting column up and down, the guide wheel group cooperates with the guide rail on the fixed column to guide up and down. Compared with the prior art, the reliability of the guide wheel and the guide rail is better, and generally smaller dust will not affect the guide wheel from crossing. In the laboratory, the applicant conducted environmental tests such as 70°C high temperature, -40°C low temperature, and rain test, and the lifting and lowering was 300,000 times without any fault. In this way, according to the average frequency of 40 times of lifting and lowering of each platform per day, the platform can be used for 20 years, which has exceeded the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a structural schematic diagram of a lifting column in an embodiment of a platform safety device in the utility model;

[0045] Figure 2 This is a schematic diagram of the structure of the fixed column in the embodiment of the platform safety device of the utility model;

[0046] Figure 3 It is a top view of an embodiment of the platform safety device of the utility model;

[0047] Figure 4 It is a structural schematic diagram of a lifting column in another embodiment of the platform safety device in the utility model;

[0048] Figure 5 It is a top view of another embodiment of the platform safety device in the utility model;

[0049] Figure 6 This is a schematic structural diagram of a lifting column in another embodiment of the present utility model;

[0050] Figure 7 It is a top view of another embodiment of the platform safety device in the utility model;

[0051] Figure 8 It is a top view of the matching relationship between the guide wheel and the guide wheel mounting seat in the utility model;

[0052] Fig. 9It is a front view of the matching relationship between the guide wheel and the guide wheel mounting seat in the utility model.

[0053] Description of reference numerals:

[0054] 1. Fixed column; 101. Guide rail; 102. Drive motor; 103. Transmission system; 104. Drive handle; 2. Lifting column; 201. Guide wheel; 3. Guide wheel mounting seat; 301. Eccentric shaft; 302. Bolt hole; 303. Positioning pin hole; 4. Dust scraper. DETAILED DESCRIPTION

[0055] The present invention is further described in detail below in conjunction with the embodiments.

[0056] The specific embodiment of the platform safety device provided by the utility model is as follows:

[0057] In order to more clearly illustrate the present invention, the lifting direction of the lifting column is first defined as the up and down direction, the direction used to connect the protective parts (pull rope, isolation rope, protective belt) during installation is the left and right direction, and the plane perpendicular to the up and down and left and right directions is the front and back direction, which corresponds to the direction for passengers to get on and off the vehicle, and is also the direction perpendicular to the drawing paper in the figure.

[0058] The lifting device of the platform safety device provided in this embodiment includes a fixed column and a lifting column. The fixed column can be fixed on the installation foundation of the platform, and the lifting column and the fixed column can be lifted up and down in coordination. Figure 1 As shown, the lifting column 2 includes a lifting column body, a side of the lower section of the lifting column body ( Figure 1 A guide wheel set is provided on one of the front and rear sides. Figure 2 As shown, the fixed column 1 includes a fixed column body, on which a guide rail 101 is arranged. The guide rail 101 can be completely fitted on the fixed column 1, and can be installed by bolts or welding. That is, the corresponding guide rail 101 should have a mounting surface for mounting with the fixed column 1. Every two pairs of guide wheels arranged at intervals on the left and right form a guide wheel group. The guide rail 101 is provided with two parallel arranged on the left and right, such as Figure 2 As shown, the two guide rails include two opposite sides (inner sides) and two opposite sides (outer sides), such as Figure 3 As shown, the two guide wheels 201 in each guide wheel group in this embodiment move along the outer side of the guide rail respectively, which is equivalent to clamping the outer side of the guide rail 101, thereby playing a role of stable left and right limit and up and down guidance. At this time, the guide wheel 201 is defined as an outer guide wheel.

[0059] In order to ensure that the guide wheel 201 can still support the fixed column 1 after the lifting column 2 is raised, at least two guide wheel groups should be arranged in an upper and lower arrangement, and the distance between two adjacent guide wheels 201 above and below forms a support arm.

[0060] When the utility model is in use, the guide rail 101 and the guide wheel 201 cooperate with each other, and have better reliability. General dust will not affect the guide wheel from crossing the guide rail. In the laboratory, the applicant conducted environmental tests such as 70℃ high temperature, -40℃ low temperature, and rain test, and the up and down lifting was 300,000 times without failure. In this way, according to the average frequency of 40 times of lifting and lowering per platform per day, the platform can be used for 20 years, which has exceeded the service life of the equipment.

[0061] As an optional implementation, on the basis that the guide wheel 201 is an outer guide wheel, the guide wheel assembly can also be increased to cooperate with the outer guide wheel on one side to play the role of a clamping guide wheel for clamping a single guide rail 101. The clamping guide wheel cooperates with the corresponding outer guide wheel to further limit the relative relationship between the guide wheel and the guide rail, has a better guiding and straightening effect, and improves stability. Figure 4 and Figure 5 As shown, the outer guide wheel and the clamping guide wheel cooperate with the clamping guide rail to provide better stability. Figure 5 There is a one-to-one correspondence between the outer guide wheel and the clamping guide wheel. In actual application, according to the tension of the protective member connected to the lifting column, only one clamping guide wheel is provided for the guide rail 101 on one side, which can also improve the stability to a certain extent.

[0062] The clamping guide wheel can be Figure 4 As shown, the outer guide wheel is arranged at the same height. In other embodiments, the outer guide wheel can also be arranged at the same height as the outer guide wheel. Figure 6 As shown, the positions of the clamping guide wheel and the two upper and lower adjacent outer guide wheels are staggered up and down. At this time, the clamping guide wheel and the outer guide wheels can form a triangular clamping structure with better stability.

[0063] Of course, in other embodiments, the installation position of the guide rail 101 can also be moved outward, and the guide wheels 201 are respectively guided and matched with the two opposite sides (inner sides) of the guide rail 101, that is, the guide wheel group internally supports two guide rails 101, and in this case, the guide wheel 201 is defined as an inner guide wheel. The arrangement of the inner guide wheel can be consistent with the outer guide wheel described above.

[0064] On the basis of setting the inner guide wheel, a clamping guide wheel moving along the outer side of the guide rail 101 can also be selectively set to cooperate with the inner guide wheel to achieve a clamping effect. In this case, the setting of the clamping guide wheel can be consistent with the clamping guide wheel adapted to the outer guide wheel.

[0065] In some embodiments, one guide rail 101 may be provided. In this case, a pair of guide wheels 201 are provided. The guide wheels 201 clamp the two opposite sides of the guide rail 101 and can also play a role of limiting guidance.

[0066] In order to improve stability, the guide wheel groups at the bottom of the lifting column 2 should be arranged close to each other, such as Figure 1As shown, such a dense setting can ensure that the lifting column 2 is still stable after rising.

[0067] It should also be noted that the lifting and lowering driving method of the lifting column 2 can be as follows: Figure 1 The drive motor 102 arranged on the horizontal axis shown is in the form of a transmission system 103 arranged on the side. The transmission system 103 can be a belt drive or a chain drive, or a ball screw drive in the prior art. When the transmission system 103 is a chain drive system, a driving wheel and a driven wheel and a transmission chain can be set on the fixed column, and the drive motor 102 drives the transmission chain to move up and down through the driving wheel. A driving handle 104 is fixed on the transmission chain, and is connected to the lifting column 2 through the driving handle 104, so that the driving force is transmitted to the lifting column 2.

[0068] In addition, if Figure 3 As shown, the guide wheel 201 in this embodiment is a groove wheel with a limiting groove set on the outer periphery, and the guide rail 101 is provided with a limiting protrusion that cooperates with the limiting groove. At this time, the guide wheel and the guide rail cooperate with each other, supporting and limiting each other in the front and rear directions, and improving the force stability in the front and rear directions. Of course, at this time, the positions of the limiting groove and the matching structure are interchanged, that is, the limiting groove is set on the guide rail, and the matching structure is set on the guide wheel, which can achieve the same effect.

[0069] Regarding the form of the limit groove, it can be specifically as follows Figure 4 The V-shaped groove shown in the figure has a V-shaped protrusion for matching with the V-shaped groove. At this time, the V-shaped groove can better improve the matching accuracy of the guide wheel and the guide rail, and evenly decompose the matching force of the two to the front and back and left and right directions. Of course, the limit groove can also adopt other forms such as U-shaped grooves. It should be noted that the V-shaped emphasized here refers to the shape of the cross section of the guide wheel and the guide rail.

[0070] In order to prevent dust from accumulating in the guide rails after long-term use, in other embodiments, the lifting column 2 is further provided with a dust cleaning device, which can cooperate with the guide rails to remove dust that may remain on the guide rails. Figure 7 As shown, the dust cleaning device can be formed by a dust scraper 4, which can move up and down along the guide rail to scrape off the dust. At the same time, when butter is injected between the guide wheel and the guide rail, the dust scraper 4 should also be provided with a lubricating surface that matches the guide rail. In addition to the dust scraper, as a feasible implementation, a brush can also be provided on the lifting column, and the brush cooperates with the guide rail to play a role in sweeping away dust.

[0071] Furthermore, the dust cleaning device may be provided with a lubricating felt (not shown in the figure), which can be attached to and scraped against the guide rail surface, thereby removing small particles of dust and also playing a lubricating role.

[0072] In some embodiments, a gap adjustment structure for adjusting the position of the guide wheel to change the gap between the guide wheel and the guide rail may also be provided. Figure 8 and Fig. 9 As shown, as an optional implementation, the gap between the guide wheel and the guide rail can be changed by adjusting the position of the guide wheel 201 relative to the guide wheel mounting seat 3. The guide wheel 201 can be installed on the lifting column 2 through the guide wheel mounting seat 3, and can be installed on the guide wheel mounting seat 3 through the eccentric shaft 301. The eccentricity here refers to the fact that the axis of the guide wheel 201 and the axis of the part of the eccentric shaft 301 that penetrates the guide wheel mounting seat 3 are not coaxial. At this time, rotating the eccentric shaft 301 can drive the guide wheel 201 to move left or right, thereby changing the gap between it and the guide rail, avoiding the lifting column being too loose due to the gap being too large or the lifting friction resistance being too large due to the gap being too small. Specifically, the eccentric screw can be directly selected for the eccentric shaft 301, and the eccentric screw can be tightened with a nut after adjusting the position, which is convenient and efficient.

[0073] As another optional implementation, the installation positions of the guide wheel 201 and the guide rail can also be changed by adjusting the relative positions of the guide wheel mounting seat 3 and the lifting column 2. Figure 8 and Fig. 9 As shown, the guide wheel mounting seat 3 can be mounted on the lifting group 2 by bolts, that is, a bolt hole for the fastening bolt to pass through is set on the guide wheel mounting seat 3, and the size of the bolt hole is slightly larger than the diameter of the fastening bolt. For example, when using M6 bolts, the bolt hole diameter can be set to 7mm. At this time, before the fastening bolt is tightened, the guide wheel mounting seat 3 can still be adjusted relative to the lifting column 2, thereby adjusting the gap between the guide wheel and the guide rail. In order to prevent the guide wheel mounting seat 3 from loosening during use, after the position of the guide wheel mounting seat 3 is determined, a positioning pin hole 303 for the positioning pin to pass through should be set between the lifting column and the guide wheel mounting seat 3, and the positioning effect of the positioning pin is used to limit the guide wheel mounting seat to a stable position.

[0074] In order to improve the wear resistance of the guide wheel, the guide wheel in this embodiment is selected to be made of wear-resistant material, and the wear-resistant material can be wear-resistant steel or wear-resistant engineering plastic in the prior art, so that the guide wheel will not be easily damaged by the friction between the guide wheel and the guide rail during long-term use. In other embodiments, the guide wheel can also be selected to have a wear-resistant layer on the outer surface. The wear-resistant layer here can be a wear-resistant material layer, such as a hard chrome layer, or a hardened layer formed by quenching treatment, which is arranged on the outer surface of the guide wheel by laser coating or plating.

[0075] Specific embodiments of the fixed column of the platform safety device in the utility model:

[0076] The fixed column of the platform safety device is the fixed column in the above-mentioned embodiment of the platform safety device, and will not be described in detail here.

[0077] Specific embodiments of the lifting column of the platform safety device in this embodiment:

[0078] The lifting column of the platform safety device is the lifting column in the above-mentioned embodiment of the platform safety device, and will not be described in detail here.

[0079] Finally, it should be noted that the above is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments without creative work, or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A lifting column of a platform safety device, comprising a lifting column body, characterized in that: At least two groups of guide wheel groups arranged vertically are arranged on one side of the lower section of the lifting column body, and each group of guide wheel groups includes at least two guide wheels arranged at intervals on the left and right and used for guiding and moving up and down along the guide rails on the fixed column.

2. The lifting column of the platform safety device according to claim 1, characterized in that: At least two guide wheel groups include two inner guide wheels respectively used for moving along the inner sides of two guide rails arranged in parallel and spaced apart from each other on the left and right sides.

3. The lifting column of the platform safety device according to claim 2, characterized in that: At least one set of guide wheel assemblies further includes at least one clamping guide wheel for moving along the outer side of at least one guide rail.

4. The lifting column of the platform safety device according to claim 3, characterized in that: The positions of the clamping guide wheel and the two upper and lower adjacent inner guide wheels are staggered and arranged correspondingly.

5. The lifting column of the platform safety device according to claim 1, characterized in that: At least two guide wheel groups include two outer guide wheels respectively used for moving along the outer sides of two guide rails arranged in parallel and spaced apart from each other on the left and right sides.

6. The lifting column of the platform safety device according to claim 5, characterized in that: At least one set of guide wheel assemblies further includes at least one clamping guide wheel for moving along the inner side of at least one guide rail.

7. The lifting column of the platform safety device according to claim 6, characterized in that: The positions of the clamping guide wheel and the two upper and lower adjacent outer guide wheels are staggered and arranged correspondingly.

8. The lifting column of the platform safety device according to any one of claims 1 to 7, characterized in that: The guide wheel groups are arranged closely above and below.

9. The lifting column of the platform safety device according to any one of claims 1 to 7, characterized in that: The lifting column body is also provided with a dust cleaning device for removing dust from the guide rail surface.

10. The lifting column of the platform safety device according to claim 9, characterized in that: The dust cleaning device is equipped with lubricating felt for scraping the guide rail surface.

11. The lifting column of the platform safety device according to any one of claims 1 to 7, characterized in that: The guide wheel is provided with a limiting groove or a limiting protrusion for front and rear limiting cooperation with the guide rail on the fixed column.

12. The lifting column of the platform safety device according to claim 11, characterized in that: The limiting groove is a V-shaped groove, and the limiting protrusion is a V-shaped protrusion.

13. The lifting column of the platform safety device according to any one of claims 1 to 7, characterized in that: A guide wheel mounting seat is also provided on the lifting column body, and the guide wheel is mounted on the guide wheel mounting seat through an eccentric shaft, so that the gap between the guide wheel and the guide rail can be changed by adjusting the rotation of the eccentric shaft.

14. The lifting column of the platform safety device according to any one of claims 1 to 7, characterized in that: A guide wheel mounting seat is also provided on the lifting column body, and the guide wheel is mounted on the guide wheel mounting seat. The guide wheel mounting seat is provided with a bolt hole for penetrating a fastening bolt, and the diameter of the bolt hole is larger than the diameter of the fastening bolt, so that the gap between the guide wheel and the guide rail can be changed by moving and adjusting the fastening bolt in the bolt hole. Positioning pin holes corresponding to each other for penetrating positioning pins are also provided between the lifting column body and the guide wheel mounting seat.

15. The lifting column of the platform safety device according to any one of claims 1 to 7, characterized in that: The outer periphery of the guide wheel is provided with a wear-resistant layer or the guide wheel is made of a wear-resistant material.

16. A fixed column of a platform safety device, comprising a fixed column body, characterized in that: A guide rail for guiding and cooperating with a guide wheel assembly arranged on the lifting column is arranged on the fixing column body, and the guide rail has a mounting surface mounted on the fixing column.

17. The fixed column of the platform safety device according to claim 16, characterized in that: The guide rails include two rails which are arranged in parallel and spaced apart on the left and right sides.

18. A platform safety device, comprising a fixed column and a lifting column, characterized in that: The lifting column is the lifting column of the platform safety device in any one of claims 1 to 15, and the fixed column is the fixed column of the platform safety device in claim 16 or 17.

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