Lifting type guardrail

Abstract

The utility model provides a lifting type guardrail which comprises two telescopic mechanisms and a plurality of fence rods, each telescopic mechanism comprises a plurality of stand columns arranged in a nested mode and a driving assembly driving the stand columns to stretch out and draw back, and the fence rods correspond to the stand columns of the telescopic mechanisms in a one-to-one mode. The two ends of the fence rod are arranged on the stand columns corresponding to the two telescopic mechanisms correspondingly, and first sliding grooves allowing the fence rod to move when the stand columns stretch out and draw back are formed in the side walls of the stand columns. The lift car roof protective guard is simple in structure, the height of the lift car roof protective guard can be flexibly controlled, and the lift car roof protective guard can meet the national standard and can deal with the situation that the top layer space of a shaft is not enough.

Description

Technical Field

[0001] The utility model belongs to the technical field of elevators, and in particular relates to a lifting type guardrail. Background Art

[0002] The height of the elevator car top guardrail is fixed, the structure is fixed and all are mechanical parts. The guardrail frame is welded into a whole, which is inconvenient to pack and disassemble. At the same time, the general car top guardrail is equipped with a door stop or a movable door, which requires manual operation by the staff. For the existing products, the shortcomings are analyzed as follows: the car top guardrail with a fixed height has requirements for the top space of the shaft. When the counterweight part reaches the lowest end, the car top guardrail should not interfere with the car side rope head bracket and other parts; if there is no door stop or the door is opened and closed manually, there will be certain safety hazards. When the staff performs maintenance work on the car top, there will be a certain risk of falling into the shaft. Utility Model Content

[0003] The utility model aims to provide a lifting type guardrail to solve the problems of the prior art.

[0004] The utility model is realized by the following technical solutions:

[0005] A lifting type guardrail includes two telescopic mechanisms and multiple fence rods. The telescopic mechanisms include multiple nested columns and a driving assembly for driving the multiple columns to be telescopic. The multiple fence rods correspond one-to-one to the multiple columns of the telescopic mechanisms. The two ends of the fence rods are respectively arranged on the columns corresponding to the two telescopic mechanisms. The side walls of the columns are provided with first sliding grooves for the fence rods to move when the columns are telescoped.

[0006] Furthermore, in every two adjacent columns, a lower frame is provided at the bottom of the outer circumference of the inner column, and an upper frame is provided at the top of the inner circumference of the outer column. The lower frame of the inner column is used to abut the upper frame of the outer column.

[0007] Furthermore, the driving assembly includes a rope pulley, a wire rope and a motor, the motor is arranged on the side wall of the outermost column, the rope pulley is arranged on the driving end of the motor and is arranged in the outermost column, the top of the inner surface of the outermost column, the top and bottom of the inner surface of the middle column and the bottom of the inner surface of the innermost column are provided with fixed pulleys, one end of the wire rope is arranged on the rope pulley, the middle part of the wire rope is wound around the fixed pulley, and the other end of the wire rope is arranged on the inner top end of the innermost column, and second slide grooves for moving the power motor when the columns are extended or retracted are opened on the side walls of the multiple columns except the outermost column.

[0008] Furthermore, the driving assembly also includes a tension dynamometer, which is arranged at the inner top end of the innermost column, and one end of the steel wire rope is connected to the tension dynamometer.

[0009] Furthermore, except for the innermost column among the plurality of columns, the tops and bottoms of the inner surfaces of the remaining columns are provided with in-position switches.

[0010] Furthermore, the driving component is connected with an ascending switch and a descending switch.

[0011] Furthermore, the drive assembly is connected to an emergency stop switch.

[0012] Furthermore, the driving component is connected to an induction switch.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows: multiple columns are nested and arranged, and the multiple columns are driven to extend and retract by a driving assembly to adjust the height of the guardrail. The structure is simple, and the height of the car top guardrail can be flexibly controlled. While meeting the national standards, it can also be sufficient to cope with the situation where there is insufficient space on the top floor of the shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of the utility model lifting type guardrail after it is raised;

[0015] Figure 2 This is a schematic diagram of the structure of the utility model lifting type guardrail after it is lowered;

[0016] Figure 3 It is a schematic diagram of the structure of the telescopic mechanism in the lifting type guardrail of the utility model after it is raised;

[0017] Figure 4 for Figure 3 A magnified schematic diagram of part A;

[0018] Figure 5 It is a schematic diagram of the structure of the telescopic mechanism in the lifting type guardrail of the utility model after it is lowered.

[0019] In the figure, 1-column, 11-first slide, 12-lower frame, 13-upper frame, 2-fence pole, 3-rope pulley, 4-wire rope, 5-motor, 6-fixed pulley, 7-tension dynamometer, 8-in-place switch, 9-up switch, 10-down switch, 20-emergency stop switch. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of the present utility model, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0023] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0024] In the description of the present utility model, it should be noted that the terms "upper", "lower", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model.

[0025] See also Figure 1 , Figure 2 , Figure 3 and Figure 5 , Figure 1 This is a schematic diagram of the structure of the utility model lifting guardrail after it is raised. Figure 2 This is a schematic diagram of the structure of the utility model after the lifting guardrail is lowered. Figure 3 This is a schematic diagram of the structure of the telescopic mechanism in the lifting type guardrail of the utility model after it is raised. Figure 5 The schematic diagram of the structure of the telescopic mechanism in the lifting guardrail of the utility model after the descent. A lifting guardrail includes two telescopic mechanisms and a plurality of fence rods 2, the telescopic mechanism includes a plurality of columns 1 arranged in a nested manner and a driving assembly for driving the plurality of columns 1 to be extended and retracted, the plurality of fence rods 2 correspond to the plurality of columns 1 of the telescopic mechanism one by one, the two ends of the fence rod 2 are respectively arranged on the columns 1 corresponding to the two telescopic mechanisms, and the side walls of the columns 1 are provided with a first slide groove 11 for the fence rod 2 to move when the columns 1 are extended and retracted.

[0026] The utility model lifting guardrail adopts a nested arrangement of multiple columns 1, and drives the multiple columns 1 to extend and retract through a driving assembly, thereby adjusting the height of the guardrail. The first slide groove 11 on the side wall of the column 1 is used for the fence rod 2 to move when the column 1 is extended and retracted, so as to prevent the fence rod 2 from blocking the movement of the column 1 when the column 1 moves. When the utility model lifting guardrail is used, it is set in the direction to be protected. It has a simple structure and can flexibly control the height of the guardrail on the top of the car. While meeting the national standard, it can also be sufficient to cope with the situation where the top space of the shaft is insufficient. In one embodiment, the number of columns 1 in the telescopic mechanism is at least three.

[0027] Clear combined reference Figure 4 , Figure 4 for Figure 3 A part of the enlarged schematic diagram. In one embodiment, in each of the two adjacent columns 1, a lower frame 12 is provided at the bottom of the outer peripheral side of the column 1 located on the inner side, and an upper frame 13 is provided at the top of the inner peripheral side of the column 1 located on the outer side. The lower frame 12 of the column 1 located on the inner side is used to abut the upper frame 13 of the column 1 located on the outer side. By respectively arranging the upper frame 13 and the lower frame 12 inside and outside the column 1, the columns 1 are nested in sequence, and multiple columns 1 can be retracted to the inside of the column 1 located on the outermost side, and the high column 1 located on the inner side can also be pushed out of the outermost column 1 by the driving component. The two adjacent columns 1 are limited by the lower frame 12 and the upper frame 13 to ensure that the columns 1 will not be separated. In order to facilitate the movement of the telescopic mechanism, in one embodiment, a bottom plate is provided at the bottom of the column 1 located on the outermost side. The bottom plate can prevent the column 1 located on the inner side from being separated from the bottom. In one embodiment, the fence rod 2 is a telescopic rod. This arrangement can adjust the width of the guardrail, further improve the applicability of the guardrail, and facilitate the storage of the guardrail. In one embodiment, a top plate is provided on the top of the innermost column 1. The top plate is provided to facilitate connection with the drive assembly.

[0028] In one embodiment, the driving assembly includes a rope pulley 3, a wire rope 4 and a motor 5. The motor 5 is arranged on the side wall of the outermost column 1, the rope pulley 3 is arranged on the driving end of the motor 5 and is arranged in the outermost column 1. Fixed pulleys 6 are arranged on the top of the inner surface of the outermost column 1, the top and bottom of the inner surface of the middle column 1 and the bottom of the inner surface of the innermost column 1. One end of the wire rope 4 is arranged on the rope pulley 3, the middle part of the wire rope 4 is wound on the fixed pulley 6, and the other end of the wire rope 4 is arranged on the inner top end of the innermost column 1. Among the multiple columns 1, except the outermost column 1, the side walls of the remaining columns 1 are provided with second slide grooves for moving the power supply motor 5 when the column 1 is extended or retracted. The steel wire rope 4 is wound around a plurality of fixed pulleys 6 in sequence from outside to inside and from top to bottom, and the end of the steel wire rope 4 away from the rope reel 3 is fixed on the top plate of the innermost column 1, and the contact sliding friction between two adjacent columns 1 is designed to be sufficiently small. The second slide groove on the side wall of the column 1 is used to move the power supply motor 5 when the column 1 is extended or retracted, so as to prevent the motor 5 from blocking the movement of the column 1 when the column 1 moves. When the telescopic mechanism needs to be extended, the motor 5 drives the rope reel 3 to rotate, so that the steel wire rope 4 is gradually wound around the rope reel 3, thereby pulling the inner columns 1 upward through the steel wire rope 4, so that the telescopic mechanism is extended; when the telescopic mechanism needs to be shortened, the motor 5 drives the rope reel 3 to rotate in the opposite direction, so that the steel wire rope 4 gradually detaches from the rope reel 3, and at this time, relying on the self-weight of the inner columns 1, the inner columns 1 will gradually drop, so that the telescopic mechanism is shortened.

[0029] In one embodiment, the driving assembly further includes a tension dynamometer 7, which is arranged at the inner top end of the innermost column 1, and one end of the wire rope 4 is connected to the tension dynamometer 7. The tension dynamometer 7 is arranged on the top plate of the innermost column 1, and one end of the wire rope 4 away from the cable drum 3 is connected to the tension dynamometer 7. The tension dynamometer 7 is used to monitor the tension of the wire rope 4, so that the telescopic mechanism can be judged whether it is abnormal or blocked by comparing the monitored tension with the preset tension setting value.

[0030] In one embodiment, except for the innermost column 1 among the plurality of columns 1, the top and bottom of the inner surface of the remaining columns 1 are provided with an in-position switch 8. The in-position switch 8 is used to monitor the rising and falling positions of the column 1 to ensure that the column 1 moves into position when rising and falling. Specifically, the in-position switch 8 cooperates with the lower frame 12. In each of the two adjacent columns 1, after the column 1 located on the inner side moves upward into position, the lower frame 12 of the column 1 located on the inner side abuts against the upper frame 13 of the column 1 located on the outer side, and at the same time, its lower frame 12 contacts the in-position switch 8 at the top of the column 1 located on the outer side, so that the corresponding in-position switch 8 is in a closed state, thereby monitoring whether the corresponding column 1 moves upward into position; similarly, after the column 1 located on the inner side moves downward into position, the lower frame 12 of the column 1 located on the inner side contacts the in-position switch 8 at the bottom of the column 1 located on the outer side, thereby monitoring whether the corresponding column 1 moves downward into position. At the same time, the in-place switch 8 can be connected to the control system of the elevator. When the maintenance personnel control the elevator to run up and down for maintenance, the in-place switch 8 on the top of the inner surface of the column 1 must be in a closed state, that is, the telescopic mechanism is in an extended state, and the lifting guardrail of the utility model forms a guardrail; after the elevator maintenance is completed, the in-place switch 8 on the bottom of the inner surface of the column 1 must be in a closed state, that is, the telescopic mechanism is in a shortened state, to avoid interference between the lifting guardrail of the utility model and components such as the rope head bracket on the side of the car.

[0031] In one embodiment, the drive assembly is connected with an ascending switch 9 and a descending switch 10. By setting the ascending switch 9 and the descending switch 10, it is convenient to manually operate the telescopic mechanism to ascend or descend. When in use, press the ascending switch 9, the drive assembly drives the plurality of columns 1 to extend, so that the telescopic mechanism is extended, and the fence rod 2 is driven to ascend, so that the utility model lifting type guardrail forms a side guardrail; press the descending switch 10, and the drive assembly drives the plurality of columns 1 to retract, so that the telescopic mechanism is shortened, and the fence rod 2 is driven to descend, so that the utility model lifting type guardrail has a lower height to save top-level space and is convenient to be placed on the top of the car. In one embodiment, the ascending switch 9 and the descending switch 10 are arranged on the top of the innermost column 1 in any telescopic mechanism.

[0032] In one embodiment, the drive assembly is connected to an emergency stop switch 20. When an abnormality occurs when the telescopic mechanism is rising or falling, or a dangerous trend may occur, the movement of the telescopic mechanism can be stopped by pressing the emergency stop switch 20. After the problem is solved, if the telescopic mechanism needs to continue to rise or fall, the rising switch 9 or the falling switch 10 is pressed accordingly to make the telescopic mechanism rise or fall. In one embodiment, the emergency stop switch 20 is set at the top of the innermost column 1 in any telescopic mechanism. The emergency stop switch 20 is preferably set above the rising switch 9 and the falling switch 10.

[0033] In one embodiment, the driving component is connected to a sensing switch. The sensing switch can be set on the top of the car roof. When the maintenance personnel opens the landing door and enters the car roof area, the sensing switch will be triggered. After receiving the signal from the sensing switch, the driving component drives the telescopic mechanism to extend, so that the lifting guardrail of the utility model forms a guardrail, so that after the maintenance personnel enter the car roof, the telescopic mechanism is automatically triggered to extend to ensure the safety of the maintenance personnel.

[0034] The following is a brief description of the use of the utility model lifting guardrail:

[0035] Maintenance personnel enter the car roof for maintenance:

[0036] After the maintenance personnel opens the floor door and enters the car top, the induction switch is triggered, and the driving component drives the telescopic mechanism to extend. The telescopic mechanism extends to trigger the in-place switches 8 located on the top of all the columns 1 and then stops, so that the lifting guardrail of the utility model forms a guardrail, and the elevator system enters the maintenance state. The maintenance personnel can control the elevator to run up and down for inspection.

[0037] Maintenance personnel leave the car roof for maintenance:

[0038] The maintenance personnel controls the elevator to the appropriate position for maintenance operation, presses the descending switch 10, and the driving assembly drives the telescopic mechanism to shorten. The telescopic mechanism shortens to trigger all the in-place switches 8 at the bottom of the column 1 and stops. The maintenance personnel leaves, closes the floor door, and the elevator returns to normal operation.

[0039] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Therefore, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A lifting guardrail, characterized in that: It includes two telescopic mechanisms and multiple fence rods. The telescopic mechanisms include multiple nested columns and a driving component for driving the multiple columns to telescope. The multiple fence rods correspond one-to-one to the multiple columns of the telescopic mechanisms. The two ends of the fence rods are respectively arranged on the columns corresponding to the two telescopic mechanisms. The side walls of the columns are provided with first sliding grooves for the fence rods to move when the columns are telescoped.

2. The lifting type guardrail according to claim 1, characterized in that: The interior of the column is hollow. In each of the two adjacent columns, a lower frame is provided at the bottom of the outer peripheral side of the column located on the inner side, and an upper frame is provided at the top of the inner peripheral side of the column located on the outer side. The lower frame of the column located on the inner side is used to abut against the upper frame of the column located on the outer side.

3. The lifting type guardrail according to claim 2, characterized in that: The driving assembly includes a rope pulley, a wire rope and a motor, the motor is arranged through the side wall of the outermost column, the rope pulley is arranged on the driving end of the motor and is arranged inside the outermost column, the top of the inner surface of the outermost column, the top and bottom of the inner surface of the middle column and the bottom of the inner surface of the innermost column are all provided with fixed pulleys, one end of the wire rope is arranged on the rope pulley, the middle part of the wire rope is wound around the fixed pulley, and the other end of the wire rope is arranged on the inner top end of the innermost column, and second slide grooves for moving the power motor when the columns are extended or retracted are opened on the side walls of the plurality of columns except the outermost column.

4. The lifting type guardrail according to claim 3, characterized in that: The driving assembly further comprises a tension dynamometer, which is arranged at the inner top end of the innermost column, and one end of the steel wire rope is connected to the tension dynamometer.

5. The lifting type guardrail according to claim 2, characterized in that: Except for the innermost column among the plurality of columns, the tops and bottoms of the inner surfaces of the remaining columns are provided with in-position switches.

6. The lifting type guardrail according to claim 1, characterized in that: The driving component is connected with an ascending switch and a descending switch.

7. The lifting type guardrail according to claim 6, characterized in that: The driving assembly is connected with an emergency stop switch.

8. The lifting type guardrail according to claim 1, characterized in that: The driving component is connected with an induction switch.

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