Elevator shaft opening guardrail

Abstract

The utility model relates to the technical field of guardrails, in particular to an elevator shaft opening guardrail which comprises a guardrail frame, the guardrail frame comprises an installation frame and a telescopic frame, and a left wall body and a right wall body are arranged on the left side and the right side of the guardrail frame respectively. According to the elevator shaft opening guardrail, a first bolt rotates in a first threaded hole to drive a bearing connected with the tail end to rotate, and a pre-fixing plate fixedly connected with the other end of the bearing is driven to move and pre-clamp a left wall body and a right wall body, so that follow-up adjustment of the distance between the guardrails is facilitated; then through cooperation of a rotating handle, a second bolt, a second threaded hole, a clamping plate and a rear clamping plate, the front and rear end faces of the left wall body and the right wall body are fastened and clamped, and through cooperation of a mounting arm, a telescopic arm, a round hole, a fixing hole and a fixing bolt, an adjusting rod is fixed, so that the labor intensity of a user is reduced; high-altitude falling objects on the top layer of the well mouth channel are intercepted through the first protective fence and the second protective fence, the steel wire rope is pulled to hang the pull ring on the hook, the protective fences are convenient to disassemble, move and reinstall, and the occupied area is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of guardrails, in particular to an elevator shaft guardrail. Background Art

[0002] The elevator shaft guardrail is a protective tool installed at the elevator shaft before the elevator is installed. Therefore, the elevator shaft must be equipped with a guardrail or a fixed gate to form an interception protection for a cavity that runs through the bottom and top floors of the elevator building to prevent falling objects from the top floor from affecting the safety of people on the bottom floors.

[0003] The utility model with the publication number CN216277040U discloses an elevator shaft guardrail, including a guardrail frame and a reinforcement assembly, wherein a plurality of reinforcement assemblies are provided for fixing the guardrail frame at the elevator shaft, the reinforcement assembly includes an outer tube, an inner tube, a vertical rod, a first cross rod and a second cross rod, one end of the outer tube is fixed to the circumferential outer wall of the guardrail frame, the inner tube is inserted into the other end of the outer tube, the inner tube is slidably connected to the outer tube, and the sliding direction is set along the length direction of the outer tube, the vertical rod is fixed to the end of the inner tube away from the outer tube, one end of the vertical rod is fixedly connected to one end of the first cross rod, and the other end of the vertical rod is fixedly connected to one end of the second cross rod, and the first guardrail and the second guardrail are provided in the guardrail frame, and the first guardrail and the second guardrail are used to separate the channel formed inside the guardrail frame;

[0004] In the above technical solution, the effect of protecting the installation wall is achieved by setting the guardrail frame, reinforcement components and sponge layer, the threaded holes, bolts, first frame and second frame are set to achieve the effect of wider application of the guardrail, and the threaded rods and threaded tubes are set to achieve the effect of strengthening the fixation of the guardrail; however, the fixing effect of the guardrail is not strong enough and the anti-collision ability is weak. When it is adapted and installed for elevator shaft openings of different sizes, it is necessary to first adjust the screws on the top of the guardrail frame to adjust the guardrail spacing to adapt to shaft openings of different sizes. Because the guardrail is high, if the adjusted size is not appropriate, the guardrail needs to be removed again to adjust the spacing, which is quite troublesome. Finally, no protective device is set to prevent falling objects from high altitude on the top floor of the elevator building from affecting the safety of people on the bottom floor. Utility Model Content

[0005] The purpose of the utility model is to provide an elevator shaft guardrail to solve the problem of an elevator shaft guardrail with the authorization publication number CN216277040U proposed in the above background technology, but the fixing effect of the guardrail is not strong enough and the anti-collision ability is weak. Moreover, when adapting and installing elevator shafts of different sizes, it is necessary to first adjust the screws on the top of the guardrail frame to adjust the guardrail spacing to adapt to shafts of different sizes. Since the guardrail is relatively high, if the adjusted size is not appropriate, the guardrail needs to be removed again to adjust the spacing, which is quite troublesome. Finally, no protective device is provided to prevent the high-altitude falling objects on the top floor of the elevator building from affecting the safety of the people on the bottom floor.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A kind of elevator shaft guardrail, including a guardrail frame, the guardrail frame includes a mounting frame and a telescopic frame, the left and right sides of the guardrail frame are respectively provided with a left wall and a right wall, the mounting frame is provided with a plurality of first guardrails, the front ends of the first guardrails are fixedly connected to the inner wall of the mounting frame, the telescopic frame is provided with a plurality of second guardrails, the front ends of the second guardrails are fixedly connected to the inner wall of the telescopic frame, the mounting frame and the vertical outer wall of the telescopic frame are provided with pre-installed components, the mounting frame and the horizontal outer wall of the telescopic frame are provided with adjustment devices, the mounting frame and the vertical outer wall of the telescopic frame are provided with protective devices, the protective devices include a first protective plate, a second protective plate, a fixing block, a connecting ring, a steel wire rope, a through hole, a limit strip, a pull ring and a hook.

[0008] Preferably, both ends of the second guardrails are inserted into the first guardrails, and both ends can be freely extended and retracted in the first guardrails.

[0009] In the utility model, the second guardrail is arranged to be telescopic in the first guardrail, and is used to cooperate with the adjusting device to adjust the spacing between the guardrails, so as to facilitate the adaptation and installation of wellheads of different sizes.

[0010] Preferably, the pre-installed assembly includes a clip, a connecting plate, a pre-fixing plate and a clamping plate. The clip is C-shaped, and one side of the C-shaped mouth of the clip is fixedly connected to the vertical outer wall of the installation frame and the telescopic frame, and the other side of the clip is connected to the connecting plate.

[0011] Preferably, the front end of the inner side surface of the connecting plate is provided with a first threaded hole, and the first bolt is inserted in the first threaded hole, the end of the first bolt is connected to the bearing and is rotatably connected to the inner ring of the bearing, the other side of the bearing is connected to a pre-fixed plate, and the side wall of the pre-fixed plate is fixedly connected to the outer ring of the other side of the bearing, and a rear splint is connected between the rear ends of the outer side surfaces of the two connecting plates on the same side, and is fixedly connected to the side wall of the rear splint.

[0012] In the utility model, two sets of clips are arranged and fixedly connected to the installation frame and the telescopic frame, and with the cooperation of the first bolt and the first threaded hole, the first bolt is rotated and drives the bearing connected to the inner ring of the end of the first bolt to rotate, and the outer ring of the other end of the bearing is fixedly connected to the pre-fixing plate and is driven to move horizontally, so that the left wall and the right wall can be pre-clamped, which is convenient for the subsequent adjustment of the spacing of the guardrails. The rear clamping plate is arranged to clamp the rear end faces of the left wall and the right wall.

[0013] Preferably, the front end surface of the pre-fixing plate is symmetrically provided with second threaded holes, and second bolts are inserted into the second threaded holes, the front end of the second bolts is fixedly connected to a rotating handle, and the end of the second bolts is rotatably connected to a clamping plate.

[0014] In the utility model, the rotating handle drives the second bolt to rotate in the second threaded hole, thereby driving the clamping plate connected to the end of the second bolt to move, clamping and fixing the front end surfaces of the left wall and the right wall, and under the rear end clamping of the rear clamping plate, finally clamping and fixing the front and rear end surfaces of the left wall and the right wall, and under the left and right clamping action of multiple groups of pre-installed components, the clamping stability and anti-collision ability are improved.

[0015] Preferably, the adjustment device includes an adjustment rod, a mounting arm, a telescopic arm and a fixing bolt. The adjustment rod is U-shaped, and the two legs of the adjustment rod are respectively fixedly mounted on the horizontal side walls of the front end surfaces of the mounting frame and the telescopic frame. The left adjustment rod is penetrated by a mounting arm, and the left end of the mounting arm is fixedly connected to the middle position of the adjustment rod.

[0016] Preferably, a plurality of circular holes are provided on the front end surface of the mounting arm, the circular holes all penetrate the mounting arm and are distributed at equal intervals, a telescopic arm is connected to the left side wall of the right adjusting rod, the front end of the telescopic arm is fixedly connected to the middle position of the left side wall of the right adjusting rod, a plurality of fixing holes are provided on the front end surface of the telescopic arm, the fixing holes all penetrate the telescopic arm and are distributed at equal intervals, the circular holes are consistent in size with the fixing holes, and a fixing bolt is inserted into one of the circular holes and the fixing hole.

[0017] In the utility model, the two adjusting rods are pulled closer or farther away to adjust the installation frame and the telescopic frame, and then the second guardrail is adjusted to be telescopic within the first guardrail, so that the spacing of the guardrails is adjusted to adapt to wellheads of different sizes. With the cooperation of the installation arm, the telescopic arm, the round hole, the fixing hole, and the fixing bolt, the adjusting rods with adjusted spacing can be fixed and limited, and there is no need to remove the adjusting rods back and forth to adjust the spacing to adapt to wellheads of different sizes, thereby reducing the labor intensity of the user and being convenient and quick.

[0018] Preferably, the bottom of the vertical outer wall of the rear end face of the mounting frame and the telescopic frame are provided with fixed blocks, the fixed block at the left end is connected to the first protective plate, and is rotatably connected to the left side of the front end of the first protective plate, the fixed block at the right end is connected to the second protective plate, and is rotatably connected to the right side of the front end of the second protective plate, the outer wall width of the second protective plate is adapted to the inner wall width of the first protective plate, and the second protective plate is inserted into the first protective plate.

[0019] In the utility model, the second protective plate is inserted into the first protective plate to prevent the impact of falling objects from the top layer on the safety of the personnel on the bottom layer. In conjunction with the extension and retraction of the first guardrail and the second guardrail, the first protective plate and the second protective plate are rotatably connected to the fixed block, and the first protective plate and the second protective plate can be contracted and folded to reduce the occupied area and facilitate subsequent dismantling and movement for installation at the next wellhead.

[0020] Preferably, at the middle position between the two clips on the same side, through holes are opened on the vertical side outer walls of the front end surfaces of the installation frame and the telescopic frame, and the through holes penetrate the installation frame and the telescopic frame, and the lower ends of the vertical side outer walls of the front end surfaces of the installation frame and the telescopic frame are fixedly connected with hooks.

[0021] Preferably, a connecting ring is provided on the left side of the rear end of the upper surface of the first protective plate, and a connecting ring is also provided on the right side of the rear end of the upper surface of the first protective plate. The connecting rings are provided with steel wire ropes and are fixedly connected to the ends of the steel wire ropes. The front ends of the steel wire ropes pass through through holes and are connected to the rear end surface of the limit strip, and the front end surface of the limit strip is fixedly connected to a pull ring.

[0022] In the utility model, by arranging the steel wire rope to slide in the through hole, after the guardrail is installed, when it is necessary to prevent falling objects from high places from causing safety impact on the personnel on the lower level, the pull ring is taken out from the hook, and the first protective plate and the second protective plate are laid flat in the wellhead channel under the action of gravity, and under the action of the limit bar and the pull ring, the steel wire rope is straightened to prevent the first protective plate and the second protective plate from detaching. When it is necessary to fold the first protective plate and the second protective plate, the steel wire rope is tightened again through the pull ring, and the pull ring is hung on the hook, so that the first protective plate and the second protective plate can be folded, which is convenient for movement and reduces the occupied area.

[0023] Compared with the prior art, the beneficial effects of the utility model are:

[0024] The utility model drives the bearing connected to the end to rotate by rotating the first bolt in the first threaded hole, thereby driving the pre-fixing plate fixedly connected to the other end of the bearing to move and pre-clamp the left wall and the right wall, which is convenient for subsequent adjustment of the guardrail spacing. Then, by cooperating with the rotating handle, the second bolt, the second threaded hole, the clamping plate and the rear clamping plate, the front and rear end surfaces of the left wall and the right wall can be tightened and clamped, thereby enhancing the stability and anti-collision ability of the guardrail. Secondly, the guardrail spacing can be freely adjusted under the adjustment of the adjusting rod, and the adjusting rod can be fixed under the cooperation of the mounting arm, the telescopic arm, the round hole, the fixing hole and the fixing bolt. There is no need to take down the guardrail back and forth to adjust the spacing to adapt to wellheads of different sizes, thereby reducing the labor intensity of the user.

[0025] The utility model can protect and intercept falling objects from high altitude on the top layer of the wellhead passage through the first guardrail and the second guardrail to prevent the safety of people on the bottom layer from being affected, and pull the steel wire rope to drive the first guard plate and the second guard plate to shrink and hang the pull ring on the hook, so as to facilitate the removal and reinstallation of the guardrail and reduce the occupied area. When it is necessary to prevent falling objects from high altitude, just remove the pull ring on the hook. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0027] Figure 2 This is a schematic diagram of the structure of the pre-installed components of the utility model;

[0028] Figure 3 This is a schematic diagram of the structure of the regulating device of the utility model;

[0029] Figure 4 It is a schematic diagram of the combined structure of the adjustment device and pre-installed components of the utility model;

[0030] Figure 5 It is a rear view of the utility model;

[0031] Figure 6 This is a schematic diagram of the structure of the protective device of the utility model.

[0032] The meaning of each number in the figure is:

[0033] Guardrail frame; 11, mounting frame; 111, first guardrail; 12, telescopic frame; 121, second guardrail;

[0034] Pre-installed components; 21, buckle; 22, connecting plate; 221, rear clamping plate; 222, first threaded hole; 23, first bolt; 231, bearing; 24, pre-fixing plate; 241, second threaded hole; 25, second bolt; 251, rotating handle; 26, clamping plate;

[0035] Adjustment device; 31, adjustment rod; 32, mounting arm; 321, round hole; 33, telescopic arm; 331, fixing hole; 34, fixing bolt;

[0036] Protective device; 41, first protective plate; 42, second protective plate; 43, fixing block; 44, connecting ring; 45, steel wire rope; 46, through hole; 47, limit strip; 48, pull ring; 49, hook;

[0037] left wall;

[0038] Right wall. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0040] See also Figure 1-Figure 6 , this embodiment provides a technical solution:

[0041] A kind of elevator shaft guardrail, comprises a guardrail frame 1, the guardrail frame 1 comprises a mounting frame 11 and a telescopic frame 12, a left wall 5 and a right wall 6 are respectively arranged on the left and right sides of the guardrail frame 1, a plurality of first guardrails 111 are arranged on the mounting frame 11, and the front ends of the first guardrails 111 are fixedly connected to the inner wall of the mounting frame 11, a plurality of second guardrails 121 are arranged on the telescopic frame 12, and the front ends of the second guardrails 121 are fixedly connected to the inner wall of the telescopic frame 12, a pre-installed component 2 is arranged on the vertical outer walls of the mounting frame 11 and the telescopic frame 12, an adjustment device 3 is arranged on the horizontal outer walls of the mounting frame 11 and the telescopic frame 12, and a protective device 4 is arranged on the vertical outer walls of the mounting frame 11 and the telescopic frame 12, and the protective device 4 comprises a first protective plate 41, a second protective plate 42, a fixing block 43, a connecting ring 44, a steel wire rope 45, a through hole 46, a limit strip 47, a pull ring 48 and a hook 49.

[0042] In this embodiment, both ends of the second guardrail 121 are inserted into the first guardrail 111 and can be freely extended and retracted in the first guardrail 111 .

[0043] When the elevator shaft guardrail of this embodiment is in use, the second guardrail 121 is arranged to be retracted within the first guardrail 111, and is used to cooperate with the adjustment device 3 to adjust the spacing between the guardrails, thereby facilitating the adaptation and installation of shafts of different sizes.

[0044] Furthermore, the pre-installed component 2 includes a buckle 21, a connecting plate 22, a first bolt 23, a pre-fixing plate 24, a second bolt 25 and a clamping plate 26. The buckle 21 is C-shaped, and one side of the C-shaped mouth of the buckle 21 is fixedly connected to the vertical side outer wall of the installation frame 11 and the telescopic frame 12. The other side of the buckle 21 is connected to the connecting plate 22, and is fixedly connected to the inner side of the connecting plate 22. The width of the connecting plate 22 is greater than the width of the left wall 5 and the right wall 6. The inner side of the connecting plate 22 A first threaded hole 222 is opened at the front end, and a first bolt 23 is inserted in the first threaded hole 222. The end of the first bolt 23 is connected to a bearing 231 and is rotatably connected to the inner ring of the bearing 231. A pre-fixing plate 24 is connected to the other side of the bearing 231, and the side wall of the pre-fixing plate 24 is fixedly connected to the outer ring of the other side of the bearing 231. A rear clamping plate 221 is connected between the rear ends of the outer sides of the two connecting plates 22 on the same side, and is fixedly connected to the side wall of the rear clamping plate 221.

[0045] In the utility model, two sets of buckles 21 are provided and fixedly connected to the mounting frame 11 and the telescopic frame 12, and with the cooperation of the first bolt 23 and the first threaded hole 222, the first bolt 23 is rotated and drives the bearing 231 connected to the inner ring of the end of the first bolt 23 to rotate, and the outer ring of the other end of the bearing 231 is fixedly connected to the pre-fixing plate 24 and is driven to move horizontally, so that the left wall 5 and the right wall 6 can be pre-clamped, which is convenient for the subsequent adjustment of the spacing of the guardrails. The rear clamping plate 221 is provided to clamp the rear end faces of the left wall 5 and the right wall 6.

[0046] Specifically, the front end surface of the pre-fixing plate 24 is symmetrically provided with second threaded holes 241 , and the second threaded holes 241 are inserted with second bolts 25 . The front ends of the second bolts 25 are fixedly connected with rotating handles 251 , and the ends of the second bolts 25 are rotatably connected with clamping plates 26 .

[0047] In the utility model, the rotating handle 251 is used to drive the second bolt 25 to rotate in the second threaded hole 241, thereby driving the clamping plate 26 connected to the end of the second bolt 25 to move, clamping and fixing the front end surfaces of the left wall 5 and the right wall 6, and under the rear end clamping of the rear clamping plate 221, the front and rear end surfaces of the left wall 5 and the right wall 6 are finally clamped and fixed, and under the left and right clamping action of multiple groups of pre-installed components 2, the clamping stability and anti-collision ability are improved.

[0048] The cam 32 is provided with a plurality of holes 321 which extend through the cam 32 and are arranged on the front of the cam 32. The cam 32 is provided with a plurality of holes 321 which extend through the cam 32 and are arranged at equal intervals. The cam 32 is provided with a plurality of holes 321 which extend through the cam 32 and are arranged at equal intervals.

[0049] In the utility model, the two adjusting rods 31 are pulled closer or farther away to adjust the installation frame 11 and the telescopic frame 12, and then the second guardrail 121 is adjusted to be telescopic within the first guardrail 111, so as to adjust the spacing of the guardrails to adapt to wellheads of different sizes. With the cooperation of the installation arm 32, the telescopic arm 33, the round hole 321, the fixing hole 331, and the fixing bolt 34, the adjusting rod 31 with the adjusted spacing can be fixed and limited, and there is no need to remove the adjusting rod 31 back and forth to adjust the spacing to adapt to wellheads of different sizes, which reduces the labor intensity of the user and is convenient and quick.

[0050] Specifically, a fixing block 43 is provided at the bottom of the vertical outer wall of the rear end face of the mounting frame 11 and the telescopic frame 12. The left end fixing block 43 is connected to the first protective plate 41 and is rotatably connected to the left side of the front end of the first protective plate 41. The right end fixing block 43 is connected to the second protective plate 42 and is rotatably connected to the right side of the front end of the second protective plate 42. The outer wall width of the second protective plate 42 is adapted to the inner wall width of the first protective plate 41, and the second protective plate 42 is inserted into the first protective plate 41.

[0051] In the utility model, the second protective plate 42 is inserted into the first protective plate 41 to prevent the impact of falling objects from the top layer on the safety of the personnel on the bottom layer. In conjunction with the extension and retraction of the first guardrail 111 and the second guardrail 121, the first protective plate 41 and the second protective plate 42 are rotatably connected to the fixed block 43, and the first protective plate 41 and the second protective plate 42 can be contracted and folded to reduce the occupied area and facilitate the subsequent dismantling and movement for the installation of the next wellhead.

[0052] It is worth adding that, at the middle position between the two buckles 21 on the same side, through holes 46 are opened on the vertical side outer walls of the front end faces of the mounting frame 11 and the telescopic frame 12, and the through holes 46 penetrate the mounting frame 11 and the telescopic frame 12. The lower ends of the vertical side outer walls of the front end faces of the mounting frame 11 and the telescopic frame 12 are fixedly connected with hooks 49. A connecting ring 44 is provided on the left side of the rear end of the upper surface of the first protective plate 41, and a connecting ring 44 is also provided on the right side of the rear end of the upper surface of the first protective plate 41. A steel wire rope 45 is provided on the connecting ring 44 and is fixedly connected to the end of the steel wire rope 45. The front ends of the steel wire ropes 45 penetrate the through holes 46 and are connected to the rear end faces of the limit strips 47. The front ends of the limit strips 47 are fixedly connected with pull rings 48.

[0053] In the utility model, by setting the steel wire rope 45 to slide in the through hole 46, when the guardrail is installed, if it is necessary to prevent falling objects from high places from causing safety impact on the personnel on the lower level, the pull ring 48 is taken out from the hook 49, and the first protective plate 41 and the second protective plate 42 are laid flat in the wellhead channel under the action of gravity, and under the action of the limit bar 47 and the pull ring 48, the steel wire rope 45 is straightened to prevent the first protective plate 41 and the second protective plate 42 from detaching. When it is necessary to fold the first protective plate 41 and the second protective plate 42, the steel wire rope 45 is tightened again through the pull ring 48, and the pull ring 48 is hung on the hook 49, so that the first protective plate 41 and the second protective plate 42 can be folded, which is convenient for movement and reduces the occupied area.

[0054] When the elevator shaft guardrail of this embodiment is used, the user places the guardrail on the left wall 5 and the right wall 6 where the guardrail needs to be installed at the shaft, and adjusts the first bolt 23 to rotate in the first threaded hole 222 according to the spacing of the shaft, and drives the pre-fixing plate 24 to move forward or backward horizontally. After adjusting to a suitable position and under the action of the rear clamping plate 221, the left wall 5 and the right wall 6 can be preliminarily pre-installed and clamped;

[0055] When the spacing between the wellheads to be installed is too large, the user pulls the two adjustment rods 31 in opposite directions to increase the spacing between the guardrails, and then inserts the fixing bolts 34 into the circular holes 321 and the fixing holes 331 to fix them. When the spacing between the wellheads to be installed is small, the user pulls the two adjustment rods 31 closer to each other to reduce the spacing between the guardrails, and then fixes them again through the fixing bolts 34. The entire adjustment process is convenient and quick, reducing the tediousness of the user to take down and install the guardrails back and forth. At this time, the second bolt 25 is rotated in the second threaded hole 241 by turning the handle 251, so that the clamping plate 26 is mortgaged close to the left wall 5 and the right wall 6, and finally the left wall 5 and the right wall 6 are clamped tightly. At the same time, under the action of the rear clamping plate 221, the double clamping of the front and rear end faces increases the clamping area and also strengthens the anti-collision ability of the guardrail.

[0056] After the final fixing and clamping installation is completed, the pull ring 48 on the hook 49 is taken out, and the first protective plate 41 and the second protective plate 42 are lowered by the wire rope 45. Under the action of the limit strip 47, the wire rope 45 will not fall off and slide out of the through hole 46. At this time, under the protective action of the first protective plate 41 and the second protective plate 42, the thrown objects appearing on the top floor of the wellhead corridor in the building are intercepted, and will not cause safety impact on the personnel on the bottom floor. When the guardrail needs to be removed, the pull ring 48 is pulled again and hung on the hook 49. Under the pulling action of the pull ring 48 and the wire rope 45, the first protective plate 41 and the second protective plate 42 are folded with the cooperation of the fixed block 43, which is convenient for subsequent removal and movement.

Claims

1. An elevator shaft guardrail, comprising a guardrail frame (1), the guardrail frame (1) comprising a mounting frame (11) and a telescopic frame (12), the guardrail frame (1) being provided with a left wall (5) and a right wall (6) on the left and right sides, respectively, characterized in that: The installation frame (11) is provided with a plurality of first guardrails (111), the front ends of the first guardrails (111) are fixedly connected to the inner side wall of the installation frame (11), the telescopic frame (12) is provided with a plurality of second guardrails (121), the front ends of the second guardrails (121) are fixedly connected to the inner side wall of the telescopic frame (12), the vertical outer walls of the installation frame (11) and the telescopic frame (12) are provided with pre-installed components (2), the horizontal outer walls of the installation frame (11) and the telescopic frame (12) are provided with adjustment devices (3), and the vertical outer walls of the installation frame (11) and the telescopic frame (12) are provided with protective devices (4), the protective devices (4) comprising a first protective plate (41), a second protective plate (42), a fixing block (43), a connecting ring (44), a steel wire rope (45), a through hole (46), a limit strip (47), a pull ring (48) and a hook (49).

2. The elevator shaft guardrail according to claim 1, characterized in that: The ends of the second guardrails (121) are both plugged into the first guardrails (111), and can be freely extended and retracted within the first guardrails (111).

3. The elevator shaft guardrail according to claim 1, characterized in that: The pre-installed assembly (2) comprises a buckle (21), a connecting plate (22), a pre-fixing plate (24) and a clamping plate (26); the buckle (21) is C-shaped; one side of the C-shaped opening of the buckle (21) is fixedly connected to the vertical outer walls of the installation frame (11) and the telescopic frame (12); and the other side of the buckle (21) is connected to the connecting plate (22).

4. The elevator shaft guardrail according to claim 3, characterized in that: The front end of the inner side surface of the connecting plate (22) is provided with a first threaded hole (222), and the first threaded hole (222) is inserted with a first bolt (23), the end of the first bolt (23) is connected to a bearing (231), and is rotatably connected to the inner ring of the bearing (231), the other side of the bearing (231) is connected to a pre-fixing plate (24), and the side wall of the pre-fixing plate (24) is fixedly connected to the outer ring of the other side of the bearing (231), and a rear clamping plate (221) is connected between the rear ends of the outer side surfaces of the two connecting plates (22) on the same side, and is fixedly connected to the side wall of the rear clamping plate (221).

5. The elevator shaft guardrail according to claim 4, characterized in that: The front end surface of the pre-fixing plate (24) is symmetrically provided with second threaded holes (241), and the second threaded holes (241) are inserted with second bolts (25). The front ends of the second bolts (25) are fixedly connected to a rotating handle (251), and the ends of the second bolts (25) are rotatably connected to a clamping plate (26).

6. The elevator shaft guardrail according to claim 1, characterized in that: The adjusting device (3) comprises an adjusting rod (31), a mounting arm (32), a telescopic arm (33) and a fixing bolt (34); the adjusting rod (31) is U-shaped, and two legs of the adjusting rod (31) are respectively fixedly mounted on the lateral side walls of the front end surfaces of the mounting frame (11) and the telescopic frame (12); the left adjusting rod (31) is connected to the mounting arm (32) through the mounting arm (32), and the left end of the mounting arm (32) is fixedly connected to the middle position of the adjusting rod (31).

7. The elevator shaft guardrail according to claim 6, characterized in that: The front end surface of the mounting arm (32) is provided with a plurality of circular holes (321), the circular holes (321) all penetrate the mounting arm (32), and the circular holes (321) are distributed at equal intervals. The left side wall of the right adjusting rod (31) is connected to a telescopic arm (33), the front end of the telescopic arm (33) is fixedly connected to the middle position of the left side wall of the right adjusting rod (31), the front end surface of the telescopic arm (33) is provided with a plurality of fixing holes (331), the fixing holes (331) all penetrate the telescopic arm (33), and the fixing holes (331) are distributed at equal intervals. The diameters of the circular holes (321) and the fixing holes (331) are consistent, and a fixing bolt (34) is inserted into one of the circular holes (321) and the fixing hole (331).

8. The elevator shaft guardrail according to claim 1, characterized in that: The bottom of the vertical side outer wall of the rear end surface of the installation frame (11) and the telescopic frame (12) are both provided with a fixing block (43); the fixing block (43) at the left end is connected to the first protective plate (41) and is rotatably connected to the left side of the front end of the first protective plate (41); the fixing block (43) at the right end is connected to the second protective plate (42) and is rotatably connected to the right side of the front end of the second protective plate (42); the width of the outer wall of the second protective plate (42) matches the width of the inner wall of the first protective plate (41), and the second protective plate (42) is inserted into the first protective plate (41).

9. The elevator shaft guardrail according to claim 3, characterized in that: At the middle position between the two buckles (21) on the same side, a through hole (46) is provided on the vertical side outer wall of the front end surface of the installation frame (11) and the telescopic frame (12), and the through hole (46) penetrates the installation frame (11) and the telescopic frame (12). The lower ends of the vertical side outer walls of the front end surfaces of the installation frame (11) and the telescopic frame (12) are fixedly connected with hooks (49).

10. The elevator shaft guardrail according to claim 8, characterized in that: A connecting ring (44) is provided on the left side of the rear end of the upper surface of the first protective plate (41), and a connecting ring (44) is also provided on the right side of the rear end of the upper surface of the first protective plate (41). A steel wire rope (45) is provided on the connecting ring (44) and is fixedly connected to the end of the steel wire rope (45). The front end of the steel wire rope (45) passes through the through hole (46) and is connected to the rear end surface of the limit strip (47). The front end surface of the limit strip (47) is fixedly connected to a pull ring (48).

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