CN217233384U - Ladder for elevator installation and maintenance - Google Patents

Abstract

The utility model discloses a ladder is used in elevator installation and maintenance, which comprises a plate body, the right side wall of plate body is provided with slide mechanism, the right-hand member of plate body has the support through slide mechanism swing joint, the lower extreme of plate body is provided with first rotation subassembly. The above structure is adopted in the utility model, can make the landing leg laminating at the plate body through first runner assembly, the lower extreme of support, can make the extension board laminating at the plate body through the second runner assembly, the upper end of support, thereby reduce the volume of ladder, be convenient for pass in and out elevator car, rotate the landing leg through first runner assembly, and make landing leg and baffle laminating, then rotate the extension board through the second runner assembly, and through articulating the position that the extension board is connected firm extension board with the landing leg, can expand the ladder, then laminate support and plate body through slide mechanism, can reduce the shared space of ladder, thereby the staff of being convenient for scrambles through trampling the subassembly, and is simple in operation and convenient to use.

Description

Ladder for elevator installation and maintenance

Technical Field

The utility model belongs to the elevator field of maintaining, in particular to elevator installation and maintenance use ladder.

Background

Elevator refers to a permanent transportation device serving several specific floors in a building, the car of which runs on at least two rigid rails moving perpendicular to the horizontal plane or at an angle of inclination less than 15 ° to the vertical, the size and the structural form of the car are convenient for passengers to get in and out or load and unload goods, and the elevator is used as a general term of vertical transportation means in the building regardless of the driving mode, and can be divided into a low-speed elevator, a fast elevator and a high-speed elevator according to the speed.

In the prior art, when an elevator is installed or maintained, the elevator can reach the top of the car to be installed and maintained after entering the inside of the car, and due to the height of the car, a ladder is usually used when the elevator is installed and maintained.

SUMMERY OF THE UTILITY MODEL

To the problem mentioned in the background art, the utility model aims at providing an elevator installation and maintain and use ladder to it is very inconvenient to solve elevator installation among the prior art, to maintain and pass in and out the car when using with the ladder, and it is big to expand back occupation space moreover, is not convenient for the staff to scramble the problem of using.

The above technical purpose of the present invention can be achieved by the following technical solutions:

the utility model provides an elevator installation and ladder of maintaining using, the package rubbing board body, the right side wall of plate body is provided with slide mechanism, the right-hand member of plate body has the support through slide mechanism swing joint, the lower extreme of plate body is provided with first runner assembly, the lower extreme of plate body rotates through first runner assembly and is connected with the landing leg, the lower extreme left side of plate body is provided with the baffle, baffle and landing leg swing joint, the right-hand member of support is provided with the second runner assembly, the right-hand member of support rotates through the second runner assembly and is connected with the extension board, the outer wall of extension board is provided with articulates the subassembly, the extension board is through articulating subassembly and landing leg swing joint, the upper end of extension board is seted up flutedly, the inside of recess is provided with tramples the subassembly, the extension board is provided with the supporting component respectively with the one end of landing leg.

Through adopting the above-mentioned technical scheme, can make the landing leg laminating at the plate body through first runner assembly, the lower extreme of support, can make the extension board laminating at the plate body through the second runner assembly, the upper end of support, thereby reduce the volume of ladder, and then be convenient for pass in and out elevator car, then rotate the landing leg through first runner assembly, and make landing leg and baffle laminating, then rotate the extension board through the second runner assembly, and be connected extension board and landing leg through articulating the subassembly, thereby stabilize the position of extension board, can expand the ladder, and through the position of the firm landing leg of supporting component with the extension board, then laminate support and plate body through slide mechanism, can reduce the shared space of ladder, thereby the staff of being convenient for scrambles through trampling the subassembly, and is simple in operation, high durability and convenient use.

Further, as preferred technical scheme, slide mechanism includes spout, litter and fixed subassembly, the right side wall at the plate body is seted up to the spout, litter sliding connection is in the inside of spout, the outer wall of litter is provided with spacing subassembly, the spout is run through to the right-hand member of litter, the right-hand member and the support fixed connection of litter, fixed subassembly sets up the left side wall at the plate body, fixed subassembly and litter swing joint.

Through adopting above-mentioned technical scheme, through litter sliding connection in the inside of spout to stabilize the litter through spacing subassembly in the inside position of spout, can make the support pass through slide mechanism and be connected with the plate body laminating, then through the position of the fixed litter of fixed subassembly, can stabilize the support and be connected with the plate body, thereby reduce the occupation space of ladder, can freely adjust the area of standing of ladder simultaneously.

Further, as preferred technical scheme, spacing subassembly includes stopper and spacing groove, the stopper sets up the outer wall at the litter, the inner wall at the spout is seted up to the spacing groove, stopper sliding connection is in the inside of spacing groove.

Through adopting above-mentioned technical scheme, through stopper sliding connection in the inside of spacing groove, make the stopper subassembly reach the effect of firm litter in spout inside position, avoid the litter to drop and lead to support and plate body separation.

Further, as preferred technical scheme, fixed subassembly includes turn trough, screw rod and thread groove, the turn trough is seted up at the left side wall of plate body, the turn trough is linked together with the spout, the screw rod rotates the inside of connecting at the turn trough, the outer wall of screw rod is provided with locating component, the inside of spout is stretched into through the turn trough to the one end of screw rod, the thread groove is seted up at the left end of litter, the inside at the thread groove of one end threaded connection of screw rod.

Through adopting above-mentioned technical scheme, through rotating the screw rod to stabilize the screw rod in the position of the internal portion of turn trough through locating component, can make the inside of one end threaded connection at the thread groove of screw rod, thereby make fixed subassembly reach the effect of fixed litter position, and then make the position of litter fixed bolster.

Further, as preferred technical scheme, locating component includes locating piece and constant head tank, the locating piece sets up the outer wall at the screw rod, the inner wall at the rotary trough is seted up to the constant head tank, the locating piece rotates the inside of connecting at the constant head tank.

Through adopting above-mentioned technical scheme, rotate the inside of connecting at the constant head tank through the locating piece, make the position of the firm screw rod of locating component, avoid the not hard up position that influences the litter of screw rod.

Further, as preferred technical scheme, first rotation assembly includes installation piece and first dead lever, the installation piece sets up the lower extreme at the plate body, first dead lever sets up the inner wall at the installation piece, the landing leg rotates the outer wall of connecting at first dead lever.

Through adopting above-mentioned technical scheme, through the position of the first dead lever of installation piece firm, make first dead lever can play the effect of firm landing leg position, make the landing leg can rotate at the lower extreme of plate body through first rotating assembly.

Further, as a preferred technical scheme, the second rotating assembly comprises a mounting groove, a second fixing rod and a connecting block, the mounting groove is formed in the right end of the support, the second fixing rod is arranged on the inner wall of the mounting groove, the connecting block is rotatably connected to the outer wall of the second fixing rod, and one end of the connecting block is fixedly connected with the support plate.

Through adopting above-mentioned technical scheme, through setting up the second dead lever in the inside of mounting groove to make connecting block and extension board fixed connection, can make the extension board pass through connecting block, second dead lever and rotate in the inside of mounting groove, thereby make the extension board pass through the second runner assembly and can rotate at the right-hand member of support, thereby the expansion of the extension board of being convenient for.

Further, as a preferred technical scheme, the hanging component comprises a pull rope, a hook and a hanging ring, the pull rope is arranged on the outer wall of the support plate, the hook is arranged at one end of the pull rope, the hanging ring is arranged on the outer wall of the support leg, and one end of the hook is hung in the hanging ring.

Through adopting above-mentioned technical scheme, through with the couple articulate in the inside of link, can make the stay cord play the effect of linking bridge and landing leg, avoid the extension board to rotate suddenly and influence the stability of ladder.

Further, as preferred technical scheme, trample the subassembly and include bull stick, footboard and gag lever post, the bull stick sets up the inboard in the recess inside, the footboard rotates the outer wall of connecting at the bull stick, the gag lever post sets up the outside in the recess inside, footboard and gag lever post swing joint.

Through adopting above-mentioned technical scheme, when needing to use the climbing of trampling the subassembly, make the footboard rotate at the outer wall of bull stick, can make the one end of footboard roll out the inside of recess to support the position of footboard through the gag lever post, can be convenient for work people trample, thereby make the staff can climb to the upper end of plate body and support through trampling the subassembly.

Further, as preferred technical scheme, the supporting component includes connecting rod, cushion and slipmat, the connecting rod sets up the one end at landing leg, extension board respectively, cushion fixed connection is in the one end of connecting rod, the slipmat sets up the one end at the cushion.

Through adopting above-mentioned technical scheme, can stabilize the position of cushion through the connecting rod, make the cushion can play the effect that supports landing leg, extension board to can avoid the condition that the cushion skidded to appear through the slipmat, make the ladder more stable.

To sum up, the utility model discloses mainly have following beneficial effect:

firstly, the supporting leg can be attached to the plate body and the lower end of the support through the first rotating assembly, the supporting plate can be attached to the plate body and the upper end of the support through the second rotating assembly, so that the size of the ladder is reduced, the elevator car can conveniently enter and exit, then the supporting leg is rotated through the first rotating assembly, the supporting leg is attached to the baffle, then the supporting plate is rotated through the second rotating assembly, the supporting plate is connected with the supporting leg through the hanging assembly, the position of the supporting plate is stabilized, the ladder can be unfolded, the position of the supporting leg and the supporting plate can be stabilized through the supporting assembly, then the support is attached to the plate body through the sliding mechanism, the space occupied by the ladder can be reduced, and therefore workers can conveniently climb through the treading assembly, the operation is simple, and the use is convenient;

second, through litter sliding connection in the inside of spout, and through stopper sliding connection in the inside of spacing groove, make the position of the firm litter of spacing subassembly in the spout inside, can make the support pass through slide mechanism and be connected with the plate body laminating, then rotate the screw rod, and through the position of the firm screw rod of locating component, the one end threaded connection that can make the screw rod is in the inside of thread groove, thereby make the position of the fixed litter of fixed subassembly, reach the effect of firm support and plate connection, thereby reduce the occupation space of ladder, the area of standing of ladder can freely be adjusted simultaneously.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a cross-sectional view of the present invention;

FIG. 3 is an enlarged view of the portion A of FIG. 2 according to the present invention;

fig. 4 is a schematic folding view of the present invention.

Reference numerals: 1. plate body, 2, sliding mechanism, 21, sliding groove, 22, sliding rod, 23, limiting component, 231, limiting block, 232, limiting groove, 24, fixing component, 241, rotating groove, 242, screw rod, 243, thread groove, 25, positioning component, 251, positioning block, 252, positioning groove, 3, support, 4, first rotating component, 41, mounting block, 42, first fixing rod, 5, support leg, 51, baffle, 6, second rotating component, 61, mounting groove, 62, second fixing rod, 63, connecting block, 7, support plate, 71, groove, 8, stepping component, 81, rotating rod, 82, pedal, 83, limiting rod, 9, supporting component, 91, connecting rod, 92, cushion block, 93, non-slip mat, 10, hitching component, 101, pull rope, 102, pothook, 103, and hanging ring.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1

Referring to fig. 1-4, the ladder for elevator installation and maintenance described in this embodiment includes a plate body 1, a sliding mechanism 2 is disposed on a right side wall of the plate body 1, a support 3 is movably connected to a right end of the plate body 1 through the sliding mechanism 2, a first rotating assembly 4 is disposed at a lower end of the plate body 1, a support leg 5 is rotatably connected to a lower end of the plate body 1 through the first rotating assembly 4, a baffle 51 is disposed at a left side of the lower end of the plate body 1, the baffle 51 is movably connected to the support leg 5, a second rotating assembly 6 is disposed at a right end of the support 3, a support plate 7 is rotatably connected to the right end of the support 3 through the second rotating assembly 6, a hanging assembly 10 is disposed on an outer wall of the support plate 7, the support plate 7 is movably connected to the support leg 5 through the hanging assembly 10, a groove 71 is disposed at an upper end of the support plate 7, a treading assembly 8 is disposed inside the groove 71, and a support assembly 9 is disposed at one end of the support plate 7 and the support leg 5; can make landing leg 5 laminate at plate body 1 through first runner assembly 4, the lower extreme of support 3, can make extension board 7 laminate at plate body 1 through second runner assembly 6, the upper end of support 3, thereby reduce the volume of ladder, and then be convenient for pass in and out elevator car, then rotate landing leg 5 through first runner assembly 4, and make landing leg 5 and baffle 51 laminate, then rotate extension board 7 through second runner assembly 6, and be connected extension board 7 and landing leg 5 through articulating subassembly 10, thereby stabilize the position of extension board 7, can expand the ladder, and can stabilize landing leg 5 and the position of extension board 7 through supporting component 9, then laminate support 3 and plate body 1 through slide mechanism 2, can reduce the shared space of ladder, thereby the staff of being convenient for scrambles through trampling subassembly 8, and is simple in operation, high durability and convenient use.

Example 2

Referring to fig. 3, on the basis of embodiment 1, in order to achieve the purpose of adjusting the distance between the plate body 1 and the bracket 3, the sliding mechanism 2 is innovatively designed in this embodiment, specifically, the sliding mechanism 2 includes a sliding slot 21, a sliding rod 22 and a fixing component 24, the sliding slot 21 is disposed on the right side wall of the plate body 1, the sliding rod 22 is slidably connected inside the sliding slot 21, a limiting component 23 is disposed on the outer wall of the sliding rod 22, the right end of the sliding rod 22 penetrates through the sliding slot 21, the right end of the sliding rod 22 is fixedly connected with the bracket 3, the fixing component 24 is disposed on the left side wall of the plate body 1, and the fixing component 24 is movably connected with the sliding rod 22; the sliding rod 22 is connected inside the sliding groove 21 in a sliding mode, the position of the sliding rod 22 inside the sliding groove 21 is stabilized through the limiting assembly 23, the support 3 can be attached to and connected with the plate body 1 through the sliding mechanism 2, then the position of the sliding rod 22 is fixed through the fixing assembly 24, and the support 3 can be connected with the plate body 1 stably, so that the occupied space of the ladder is reduced, and meanwhile the standing area of the ladder can be adjusted freely.

Referring to fig. 3, in order to achieve the purpose of stabilizing the position of the slide rod 22 inside the sliding slot 21, the limiting assembly 23 of this embodiment includes a limiting block 231 and a limiting groove 232, the limiting block 231 is disposed on the outer wall of the slide rod 22, the limiting groove 232 is disposed on the inner wall of the sliding slot 21, and the limiting block 231 is slidably connected inside the limiting groove 232; the limiting block 231 is slidably connected inside the limiting groove 232, so that the limiting block 231 component can stabilize the position of the sliding rod 22 inside the sliding groove 21, and the separation of the bracket 3 from the plate body 1 caused by the falling of the sliding rod 22 is avoided.

Referring to fig. 3, in order to achieve the purpose of fixing the position of the bracket 3 by the slide rod 22, the fixing assembly 24 of the present embodiment includes a rotating groove 241, a screw 242, and a threaded groove 243, the rotating groove 241 is opened on the left side wall of the plate body 1, the rotating groove 241 is communicated with the slide groove 21, the screw 242 is rotatably connected inside the rotating groove 241, the outer wall of the screw 242 is provided with a positioning assembly 25, one end of the screw 242 extends into the slide groove 21 through the rotating groove 241, the threaded groove 243 is opened on the left end of the slide rod 22, and one end of the screw 242 is threadedly connected inside the threaded groove 243; by rotating the screw 242 and fixing the position of the screw 242 in the rotating groove 241 by the positioning member 25, one end of the screw 242 is screwed into the screw groove 243, so that the fixing member 24 functions to fix the position of the slide rod 22, and the slide rod 22 fixes the position of the bracket 3.

Referring to fig. 3, in order to stabilize the position of the screw 242, the positioning assembly 25 of the present embodiment includes a positioning block 251 and a positioning groove 252, the positioning block 251 is disposed on an outer wall of the screw 242, the positioning groove 252 is disposed on an inner wall of the rotating groove 241, and the positioning block 251 is rotatably connected inside the positioning groove 252; the positioning block 251 is rotatably connected inside the positioning groove 252, so that the positioning assembly 25 stabilizes the position of the screw 242, and the position of the slide rod 22 is prevented from being affected by the looseness of the screw 242.

Example 3

Referring to fig. 2, the present embodiment is based on embodiment 2, and in order to achieve the purpose of adjusting the position of the leg 5, the present embodiment has an innovative design on the first rotating assembly 4, specifically, the first rotating assembly 4 includes a mounting block 41 and a first fixing rod 42, the mounting block 41 is disposed at the lower end of the plate body 1, the first fixing rod 42 is disposed on the inner wall of the mounting block 41, and the leg 5 is rotatably connected to the outer wall of the first fixing rod 42; the position of the first fixing rod 42 is stabilized by the mounting block 41, so that the first fixing rod 42 can play a role of stabilizing the position of the supporting leg 5, and the supporting leg 5 can rotate at the lower end of the plate body 1 through the first rotating assembly 4.

Referring to fig. 2, for the purpose of adjusting the support plate 7, the second rotating assembly 6 of the present embodiment includes a mounting groove 61, a second fixing rod 62 and a connecting block 63, the mounting groove 61 is opened at the right end of the bracket 3, the second fixing rod 62 is disposed on the inner wall of the mounting groove 61, the connecting block 63 is rotatably connected to the outer wall of the second fixing rod 62, and one end of the connecting block 63 is fixedly connected to the support plate 7; through setting up second dead lever 62 in the inside of mounting groove 61 to make connecting block 63 and extension board 7 fixed connection, can make extension board 7 pass through connecting block 63, second dead lever 62 and rotate in the inside of mounting groove 61, thereby make extension board 7 pass through second runner assembly 6 can rotate at the right-hand member of support 3, thereby be convenient for extension board 7.

Referring to fig. 2, for the purpose of stabilizing the support plate 7, the hanging assembly 10 of the present embodiment includes a pull rope 101, a hook 102 and a hanging ring 103, wherein the pull rope 101 is disposed on the outer wall of the support plate 7, the hook 102 is disposed at one end of the pull rope 101, the hanging ring 103 is disposed on the outer wall of the support leg 5, and one end of the hook 102 is hung inside the hanging ring 103; by hanging the hook 102 inside the hanging ring 103, the pull rope 101 can function as a connecting bracket 3 and the supporting leg 5, and the influence of the sudden rotation of the supporting plate 7 on the stability of the ladder can be avoided.

Referring to fig. 2, in order to achieve the purpose of facilitating the stepping of the worker, the stepping assembly 8 of the present embodiment includes a rotating rod 81, a pedal 82 and a limiting rod 83, the rotating rod 81 is disposed inside the groove 71, the pedal 82 is rotatably connected to the outer wall of the rotating rod 81, the limiting rod 83 is disposed outside the groove 71, and the pedal 82 is movably connected to the limiting rod 83; when needs use tread assembly 8 to climb, make footboard 82 rotate at the outer wall of bull stick 81, can make the inside of recess 71 is rolled out to the one end of footboard 82 to support the position of footboard 82 through gag lever post 83, can be convenient for the staff trample, thereby make the staff can climb to the upper end of plate body 1 and support 3 through tread assembly 8.

Referring to fig. 2, for the purpose of improving the stability of the ladder, the support assembly 9 of the present embodiment includes a connecting rod 91, a cushion block 92 and a non-slip pad 93, wherein the connecting rod 91 is respectively disposed at one end of the leg 5 and the support plate 7, the cushion block 92 is fixedly connected to one end of the connecting rod 91, and the non-slip pad 93 is disposed at one end of the cushion block 92; the position of the cushion block 92 can be stabilized through the connecting rod 91, so that the cushion block 92 can play a role in supporting the supporting legs 5 and the supporting plate 7, the slipping condition of the cushion block 92 can be avoided through the non-slip pad 93, and the ladder is more stable.

The use principle and the advantages are as follows: when the ladder is needed to be used, the ladder is moved into the interior of an elevator car, then the supporting leg 5 is enabled to rotate on the inner wall of the mounting block 41 through the first fixing rod 42, the position of the supporting leg 5 can be adjusted through the first rotating component 4, the supporting leg 5 is supported through the baffle 51, a certain angle is kept for the supporting leg 5, then the supporting plate 7 is enabled to rotate in the mounting groove 61 through the connecting block 63 and the second fixing rod 62, the position of the supporting plate 7 can be adjusted through the second rotating component 6, the upper end of the supporting plate 7 is enabled to be in contact with the lower end of the support 3, the supporting plate 7 can be prevented from continuing to rotate, then the hook 102 is hung in the hanging ring 103, the hanging component 10 can achieve the effect of connecting the supporting plate 7 and the supporting leg 5, the pull rope 101 can play a role of stabilizing the position of the supporting plate 7, the rotation of the supporting plate 7 is avoided, after the supporting leg 5 and the supporting plate 7 are unfolded, the cushion block 92 at one end of the connecting rod 91 can play a role of supporting the supporting leg 5 and the supporting plate 7, the support assembly 9 can be used for improving the stability of the ladder by fixing the position of the cushion block 92 through the anti-slip pad 93, then the bracket 3 is pushed to enable the sliding rod 22 to slide in the sliding groove 21 and be connected in the limiting groove 232 in a sliding manner through the limiting block 231, the position of the sliding rod 22 is fixed through the limiting assembly 23, then the bracket 3 can be attached to the plate body 1 through the sliding mechanism 2, then the screw 242 is rotated and is connected in the positioning groove 252 through the positioning block 251, the position of the screw 242 in the rotating groove 241 is fixed through the positioning assembly 25, one end of the screw 242 can be connected in the thread groove 243 through the thread, so that the fixing assembly 24 can be used for fixing the position of the bracket 3 through the sliding rod 22, the space occupied by the ladder can be further reduced, then the pedal 82 can be rotated out of the groove 71 through the rotating rod 81, and the position of the pedal 82 can be fixed through the limiting rod 83, can make the staff climb to the upper end of plate body 1 and support 3 through trampling subassembly 8, easy operation, convenient to use not only can be convenient for get into elevator car, can adjust the occupation space and the area of standing of ladder as required simultaneously.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (10)

1. The utility model provides an elevator installation and ladder for maintenance which characterized in that: comprises a plate body (1), the right side wall of the plate body (1) is provided with a sliding mechanism (2), the right end of the plate body (1) is movably connected with a support (3) through the sliding mechanism (2), the lower end of the plate body (1) is provided with a first rotating assembly (4), the lower end of the plate body (1) is rotatably connected with a supporting leg (5) through the first rotating assembly (4), the left side of the lower end of the plate body (1) is provided with a baffle (51), the baffle (51) is movably connected with the supporting leg (5), the right end of the support (3) is provided with a second rotating assembly (6), the right end of the support (3) is rotatably connected with a supporting plate (7) through the second rotating assembly (6), the outer wall of the supporting plate (7) is provided with a hanging assembly (10), and the supporting plate (7) is movably connected with the supporting leg (5) through the hanging assembly (10), the upper end of the support plate (7) is provided with a groove (71), a treading assembly (8) is arranged in the groove (71), and supporting assemblies (9) are respectively arranged at one ends of the support plate (7) and the supporting legs (5).

2. A ladder as set forth in claim 1 for installation and maintenance of an elevator, wherein: slide mechanism (2) include spout (21), litter (22) and fixed subassembly (24), the right side wall at plate body (1) is seted up in spout (21), litter (22) sliding connection is in the inside of spout (21), the outer wall of litter (22) is provided with spacing subassembly (23), spout (21) are run through to the right-hand member of litter (22), the right-hand member and support (3) fixed connection of litter (22), fixed subassembly (24) set up the left side wall at plate body (1), fixed subassembly (24) and litter (22) swing joint.

3. A ladder as set forth in claim 2, wherein: spacing subassembly (23) include stopper (231) and spacing groove (232), stopper (231) set up the outer wall at litter (22), the inner wall at spout (21) is seted up in spacing groove (232), stopper (231) sliding connection is in the inside of spacing groove (232).

4. A ladder as set forth in claim 2, wherein: fixed subassembly (24) are including turn trough (241), screw rod (242) and thread groove (243), the left side wall at plate body (1) is seted up in turn trough (241), turn trough (241) are linked together with spout (21), screw rod (242) are rotated and are connected in the inside of turn trough (241), the outer wall of screw rod (242) is provided with locating component (25), the inside of spout (21) is stretched into through turn trough (241) in the one end of screw rod (242), the left end at litter (22) is seted up in thread groove (243), the inside at thread groove (243) is connected to the one end screw thread of screw rod (242).

5. A ladder as set forth in claim 4, wherein: the positioning assembly (25) comprises a positioning block (251) and a positioning groove (252), the positioning block (251) is arranged on the outer wall of the screw rod (242), the positioning groove (252) is formed in the inner wall of the rotary groove (241), and the positioning block (251) is rotatably connected to the inside of the positioning groove (252).

6. A ladder as set forth in claim 1 for installation and maintenance of an elevator, wherein: first rotating assembly (4) are including installation piece (41) and first dead lever (42), installation piece (41) set up the lower extreme at plate body (1), first dead lever (42) set up the inner wall at installation piece (41), landing leg (5) are rotated and are connected the outer wall at first dead lever (42).

7. A ladder as set forth in claim 1 for installation and maintenance of an elevator, wherein: the second rotating assembly (6) comprises a mounting groove (61), a second fixing rod (62) and a connecting block (63), the right end of the support (3) is arranged on the mounting groove (61), the second fixing rod (62) is arranged on the inner wall of the mounting groove (61), the connecting block (63) is rotatably connected to the outer wall of the second fixing rod (62), and one end of the connecting block (63) is fixedly connected with the support plate (7).

8. A ladder as set forth in claim 1, wherein: the hanging assembly (10) comprises a pull rope (101), a hook (102) and a hanging ring (103), wherein the pull rope (101) is arranged on the outer wall of the support plate (7), the hook (102) is arranged at one end of the pull rope (101), the hanging ring (103) is arranged on the outer wall of the support leg (5), and one end of the hook (102) is hung inside the hanging ring (103).

9. A ladder as set forth in claim 1, wherein: step on subassembly (8) and include bull stick (81), footboard (82) and gag lever post (83), bull stick (81) set up the inboard in recess (71) inside, footboard (82) rotate the outer wall of connecting at bull stick (81), gag lever post (83) set up the outside in recess (71) inside, footboard (82) and gag lever post (83) swing joint.

10. A ladder as set forth in claim 1 for installation and maintenance of an elevator, wherein: the supporting assembly (9) comprises a connecting rod (91), a cushion block (92) and a non-slip mat (93), the connecting rod (91) is arranged at one end of each of the supporting legs (5) and the supporting plate (7), the cushion block (92) is fixedly connected to one end of the connecting rod (91), and the non-slip mat (93) is arranged at one end of the cushion block (92).

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