Ladder stand assembly for elevator pit and elevator shaft comprising ladder stand assembly

Abstract

The utility model provides a ladder stand assembly used for an elevator pit and an elevator shaft comprising the ladder stand assembly, the ladder stand assembly comprises a main body part, one side of the main body part extending along the transverse direction is rotatably installed on a first side wall of one side, close to an entrance, of the elevator pit; the telescopic part is slidably mounted on the upper side of the main body part and has a contraction state of stretching into the main body part and an extension state of stretching out of the main body part so as to change the height of the crawling ladder assembly; and the supporting part is installed at the position, close to the first side wall, of the bottom of the elevator pit and suitable for keeping the crawling ladder assembly at the first position leaning against the first side wall or the second position perpendicular to the first side wall, so that the shaft space occupied by the crawling ladder assembly is saved, and a maintainer can conveniently move the crawling ladder.

Description

TECHNICAL FIELD

[0001] At least one embodiment of the utility model relates to a ladder applied to elevator shaft, concretely relates to a ladder assembly for elevator pit and elevator shaft including the ladder assembly. BACKGROUND

[0002] In elevator pit, usually set up the ladder for maintenance personnel to go in and out of the pit from the hall door, in order to effectively utilize the shaft space, the ladder is usually fixed or hung in the shaft side wall, and maintenance personnel need to cross to the ladder, or place the ladder to the appropriate position, then go in and out of the pit by means of the ladder.

[0003] When selecting the ladder for elevator pit, the distance from the ladder to the hall door entrance and the ladder placement position limit, the type and weight of the ladder, and the size of the car and shaft need to be considered comprehensively, thus, in the case of narrow shaft space, it is very difficult to select the appropriate ladder for elevator pit, and maintenance personnel is inconvenient to operate in the process of moving the ladder. UTILITY MODEL CONTENT

[0004] Therefore, the embodiment of the utility model provides a ladder assembly for elevator pit to save the shaft space occupied by the ladder assembly and facilitate maintenance personnel to move the ladder.

[0005] According to the embodiment of the utility model, a ladder assembly for elevator pit is provided, which comprises: a main body part, which is rotatably installed on a first side wall near an entrance side of the elevator pit along a transverse direction; a telescopic part, which is slidably installed on an upper side of the main body part and has a retracted state of extending into the main body part and an extended state of extending out of the main body part to change the height of the ladder assembly; and a supporting part, which is installed at a position near the first side wall at the bottom of the elevator pit and is suitable for keeping the ladder assembly at a first position leaning against the first side wall or a second position perpendicular to the first side wall.

[0006] According to the embodiment of the utility model, the main body part is installed on the first side wall through at least one rotating assembly; each rotating assembly comprises: a mounting frame installed on the first side wall; and a rotating frame connected with the main body part at one end and rotatably connected with the mounting frame at the other end, so that the main body part can rotate relative to the mounting frame.

[0007] According to the embodiment of the utility model, the mounting frame includes two mounting plates extending in parallel in a horizontal plane and facing each other, and a connecting plate connected between the two mounting plates, the connecting plate is mounted on the first side wall, one end of the rotating frame extends into the two mounting plates, and the connecting rod is connected by penetrating the rotating frame and the two mounting plates, so that the rotating frame can rotate around the connecting rod.

[0008] According to the embodiment of the utility model, the ladder stand assembly further includes a support frame extending in a height direction and mounted on the first side wall, and the connecting plate is mounted on the support frame.

[0009] According to the embodiment of the utility model, the telescopic part includes a plurality of telescopic segments, each telescopic segment includes a step stick and two telescopic rods mounted on both ends of the step stick and facing each other, two adjacent telescopic rods are slidably connected, and the telescopic rod on the lower side is slidably mounted on the upper side of the main body part, and a plurality of pairs of locking assemblies are mounted at two ends of the step stick extending in a transverse direction on the top of the main body part or the step stick between adjacent telescopic segments, and are configured to limit the relative position between the telescopic segment and the main body part or adjacent telescopic segment when the telescopic segment is extended in place from the main body part or adjacent telescopic segment.

[0010] According to the embodiment of the utility model, the step stick of each telescopic segment and the two ends of the step stick extending in a transverse direction on the top of the main body part are respectively provided with a containing groove, each locking assembly includes a limiting plate extending in a vertical longitudinal plane and mounted inside the containing groove, a spring extending in a transverse direction and connected to the limiting plate at one end, a limiting member movably mounted on the side of the containing groove away from the limiting plate and connected to the other end of the spring, and a limiting ring mounted on the outside of the limiting member and connected to the inner wall of the containing groove, suitable for limiting the movement of the limiting member in a height direction and a transverse direction, so that the limiting member prevents the telescopic segment above from moving downward in a height direction when the telescopic segment is extended in place from the main body part or adjacent telescopic segment.

[0011] According to the embodiment of the utility model, a lifting rope is further mounted on each telescopic segment, suitable for lifting the telescopic segment.

[0012] According to the embodiment of the utility model, the main body part includes the pivot side connected with the first side wall and the rotating side rotating around the pivot side, the support part includes: the first limiting frame is installed at the bottom of the elevator pit and is configured to make the bottom of the rotating side of the main body part extend into the inside of the first limiting frame in the case that the main body part leans against the first side wall, so that the main body part is kept at the first position, and the second limiting frame is installed at the bottom of the elevator pit and is configured to make the bottom of the rotating side of the main body part extend into the inside of the second limiting frame in the case that the main body part is perpendicular to the first side wall, so that the main body part is kept at the second position.

[0013] According to the embodiment of the utility model, the first limiting frame includes: the first base is configured to be substantially L-shaped, one side wall is installed on the first side wall, and the other side wall is attached to the bottom of the elevator pit, the first slot is installed on the first base to allow the bottom of the rotating side of the main body part to extend into and limit the movement of the bottom of the rotating side of the main body part, and the first guide plate is obliquely installed on the side of the first slot away from the first side wall to guide the rotating side of the main body part to extend into or out of the first slot.

[0014] According to the embodiment of the utility model, the second limiting frame includes: the second base includes the first base plate and the second base plate connected perpendicularly, the first base plate is installed on the first side wall, and the second base plate is attached to the bottom of the elevator pit, the second slot is installed at the end of the second base plate to allow the bottom of the rotating side of the main body part to extend into and limit the movement of the bottom of the rotating side of the main body part, and the second guide plate is obliquely installed on the side of the second slot facing the rotating track of the main body part to guide the rotating side of the main body part to extend into or out of the second slot.

[0015] According to the embodiment of the utility model, the ladder climbing assembly further includes: a safety switch installed on the first side wall and connected with the safety circuit of the elevator, and a trigger installed on the side of the main body part close to the safety switch in the transverse direction, so that the trigger presses the safety switch to disconnect the safety circuit in the process of rotating the main body part.

[0016] According to the embodiment of the utility model, the trigger is configured to be substantially cam-shaped, and the convex part of the trigger faces the safety switch.

[0017] According to the embodiment of the utility model, an elevator shaft is provided, which includes: an elevator pit, and the ladder climbing assembly for the elevator pit in the above embodiment is installed inside the elevator pit.

[0018] According to the above embodiments of the present invention, the ladder assembly for an elevator pit is rotatably mounted on a first sidewall near the entrance of the elevator pit along one side of the main body extending laterally. A support portion is installed at the bottom of the elevator pit near the first sidewall, allowing the ladder assembly to be held in a first position against the first sidewall or a second position perpendicular to the first sidewall. This facilitates maintenance personnel in moving the ladder assembly to a storage or working position. Furthermore, a telescopic portion is slidably installed on the upper side of the main body, facilitating changes in the height of the ladder assembly and simplifying storage. The ladder assembly's rotatable and telescopic structure saves space within the shaft and allows maintenance personnel to move the ladder assembly between the storage and working positions. Even in narrow shaft spaces, ample space is provided for the storage and movement of the ladder assembly, facilitating operation by maintenance personnel. Attached Figure Description

[0019] Figure 1 This is a perspective view of an embodiment of the present invention showing a ladder assembly for an elevator pit held in a first position against a first side wall.

[0020] Figure 2 This is a partially enlarged view of an embodiment of the present invention showing the ladder assembly for an elevator pit held in a first position against the first side wall.

[0021] Figure 3 This is a perspective view of an embodiment of the present invention showing a ladder assembly for an elevator pit held in a second position perpendicular to the first side wall.

[0022] Figure 4 yes Figure 1 A magnified view of part A in the middle;

[0023] Figure 5 This is a three-dimensional schematic diagram of the telescopic section of the ladder assembly for elevator pit according to an embodiment of the present invention;

[0024] Figure 6 This is a cross-sectional view of the step bar with a locking component installed in the ladder assembly for elevator pit according to an embodiment of the present invention.

[0025] Figure 7 This is a sectional view along the horizontal plane of the limiting member of the ladder assembly for elevator pit according to an embodiment of the present utility model.

[0026] Figure 8 yes Figure 1 A magnified view of part B in the middle section;

[0027] Figure 9 yes Figure 1 A magnified view of part C in the middle; and

[0028] Figure 10 is Figure 3 Partial enlarged view of D part in figure.

[0029] In the figure:

[0030] 1 - main body part; 11 - rotating side; 12 - rotating shaft side;

[0031] 2 - elevator pit; 21 - first side wall; 22 - sill; 23 - foot guard plate;

[0032] 3 - telescopic part;

[0033] 31 - telescopic section; 311 - step stick; 312 - telescopic rod;

[0034] 32 - pull rope;

[0035] 33 - locking assembly; 331 - limiting plate; 332 - spring; 333 - limiting piece; 334 - limiting ring; 335 - vertical column section; 336 - spherical surface section;

[0036] 4 - support part;

[0037] 41 - first limiting frame; 411 - first base; 412 - first slot; 413 - first guide plate;

[0038] 42 - second limiting frame; 421 - second base; 422 - second slot; 423 - second guide plate;

[0039] 5 - rotating assembly;

[0040] 51 - mounting frame; 511 - mounting plate; 512 - connecting plate;

[0041] 52 - rotating frame;

[0042] 53 - connecting rod;

[0043] 6 - support frame;

[0044] 7 - safety switch;

[0045] 8 - trigger; 81 - convex part. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the following will combine with specific embodiment, and refer to the drawings, make further detailed description to the utility model.

[0047] According to the inventive concept of one aspect of the present application, a ladder assembly for an elevator pit is provided, comprising: a main body part, one side of which extending in a transverse direction is rotatably installed on a first side wall of the elevator pit near an entrance side; a telescopic part, slidably installed on an upper side of the main body part, having a retracted state of extending into the main body part and an extended state of extending out of the main body part to change the height of the ladder assembly; and a support part, installed on the bottom of the elevator pit, adapted to keep the ladder assembly in a first position leaning against the first side wall or a second position perpendicular to the first side wall.

[0048] Figure 1 is a perspective view of the ladder assembly for the elevator pit kept in the first position leaning against the first side wall according to the embodiment of the present application; Figure 2 is a partial enlarged view of the ladder assembly for the elevator pit kept in the first position leaning against the first side wall according to the embodiment of the present application; Figure 3 is a perspective view of the ladder assembly for the elevator pit kept in the second position perpendicular to the first side wall according to the embodiment of the present application.

[0049] According to the exemplary embodiment of the present application, please refer to Figures 1-3 , a ladder assembly for an elevator pit is provided, comprising a main body part 1, a telescopic part 3 and a support part 4. One side of the main body part 1 extending in a transverse direction is rotatably installed on a first side wall 21 of the elevator pit 2 near an entrance side. The telescopic part 3 is slidably installed on an upper side of the main body part 1, having a retracted state of extending into the main body part 1 and an extended state of extending out of the main body part 1 to change the height of the ladder assembly. The support part 4 is installed on the bottom of the elevator pit 2 near the first side wall 21, adapted to keep the ladder assembly in a first position leaning against the first side wall 21 or a second position perpendicular to the first side wall 21.

[0050] In the present embodiment, by rotatably installing one side of the main body part 1 extending in a transverse direction on the first side wall 21 of the elevator pit 2 near an entrance side, and installing the support part 4 on the bottom of the elevator pit 2 near the first side wall 21, the ladder assembly can be kept in the first position leaning against the first side wall 21 or the second position perpendicular to the first side wall 21, facilitating maintenance personnel to move the ladder assembly to the storage position or the working position. Further, slidably installing the telescopic part 3 on the upper side of the main body part 1 facilitates changing the height of the ladder assembly and storage. The ladder assembly adopts the above rotatable and telescopic structure, on the one hand saving the space occupied in the shaft space, on the other hand facilitating maintenance personnel to move the ladder assembly between the storage position and the working position. Even in the case of narrow shaft space, it can also provide relatively ample use space for the storage and movement of the ladder assembly, facilitating maintenance personnel to operate.

[0051] It should be noted that in the embodiment, the pit 2 is a region below the threshold 22 at the entrance, and the first sidewall 21 of the pit 2 is also provided with a footboard 23 near the threshold 22.

[0052] The ladder climbing assembly of the embodiment of the utility model does not need extra space, and the installation and use of the ladder climbing assembly are not affected by the size of the shaft space, and the storage position and working position of the ladder climbing assembly are close to the entrance, which is more friendly to the operator. In addition, the ladder climbing assembly of the embodiment of the utility model is simple in structure, stable in fixation, and low in cost.

[0053] Figure 4 is Figure 1 A partial enlarged view of the A part.

[0054] In some example embodiments, with reference to Figures 1-2 and Figure 4 The main body 1 is installed on the first sidewall 21 through at least one rotating assembly 5. Each rotating assembly 5 includes a mounting frame 51 and a rotating frame 52. The mounting frame 51 is installed on the first sidewall 21. One end of the rotating frame 52 is connected to the main body 1, and the other end is rotatably connected to the mounting frame 51, so that the main body 1 can rotate relative to the mounting frame 51.

[0055] It should be noted that in the embodiment, the main body 1 is installed on the first sidewall 21 through two rotating assemblies 5, and the two rotating assemblies 5 are installed in sequence in the height direction on the side where the main body 1 is connected to the first sidewall 21, so as to improve the stability of the main body 1 during rotation.

[0056] In some example embodiments, with reference to Figures 1-2 and Figure 4 The mounting frame 51 includes two mounting plates 511 that extend in parallel and face each other in the horizontal plane, and a connecting plate 512 connected between the two mounting plates 511. The connecting plate 512 is installed on the first sidewall 21. One end of the rotating frame 52 extends into between the two mounting plates 511, and the connecting rod 53 is connected through the rotating frame 52 and the two mounting plates 511, so that the rotating frame 52 can rotate around the connecting rod 53.

[0057] It should be noted that in the embodiment, the rotating frame 52 is configured as a substantially U-shaped frame, and the closed end of the rotating frame 52 is connected to the main body 1, and the open end of the rotating frame 52 extends into between the two mounting plates 511. Among them, the rotating frame 52 is configured as a substantially U-shaped frame to enhance the structural strength of the rotating frame 52, thereby ensuring the reliability during repeated rotation of the main body 1 relative to the first sidewall 21.

[0058] In some example embodiments, with reference to Figures 1-2 and Figure 4The ladder climbing assembly further comprises a support frame 6. The support frame 6 extends in the height direction and is mounted on the first side wall 21. The connecting plate 512 is mounted on the support frame 6.

[0059] In the embodiment, the support frame 6 mounted on the first side wall 21 and the connecting plate 512 mounted on the support frame 6 are arranged to facilitate the disassembly and assembly of the rotating assembly 5.

[0060] Figure 5 is a perspective view of a telescopic section of a ladder climbing assembly for an elevator pit according to an embodiment of the utility model; Figure 6 is a sectional view of a step rod of a ladder climbing assembly for an elevator pit according to an embodiment of the utility model.

[0061] In some example embodiments, referring to Figures 2-6 The telescopic section 3 comprises a plurality of telescopic sections 31 and a plurality of pairs of locking assemblies 33. Each telescopic section 31 comprises a step rod 311 and two telescopic rods 312 mounted on both ends of the step rod 311 and facing each other. The two adjacent telescopic rods 312 are slidably connected, and the lower telescopic rod 312 is slidably mounted on the upper side of the main body 1. Each pair of locking assemblies 33 is respectively mounted on the step rod 311 at the top of the main body 1 or on both ends of the step rod 311 extending in the transverse direction between adjacent telescopic sections 31, and is configured to limit the relative position between the telescopic section 31 and the main body 1 or the adjacent telescopic section 31 when the telescopic section 31 is extended in place from the main body 1 or the adjacent telescopic section 31.

[0062] Through the above arrangement, the lower telescopic section 31 and the main body 1, and the plurality of telescopic sections 31 can slide relative to each other to realize the extension of the telescopic section 31 from the main body 1 or the adjacent telescopic section 31. When the telescopic section 31 is extended in place from the main body 1 or the adjacent telescopic section 31, the locking assembly 33 limits the relative position between the telescopic section 31 and the main body 1 or the adjacent telescopic section 31. In this way, when the maintenance personnel use the ladder climbing assembly to enter and exit the elevator pit 2, the telescopic section 3 can be extended from the main body 1, and the height of the ladder climbing assembly can be adjusted according to the construction conditions. After the maintenance is completed, the telescopic section 3 can be retracted into the main body 1 to save the shaft space occupied by the ladder climbing assembly.

[0063] Figure 7 is a sectional view of a limiting piece of a ladder climbing assembly for an elevator pit according to an embodiment of the utility model.

[0064] In some example embodiments, referring to Figures 2-7The two ends of the step bar 311 of each telescopic section 31 and the step bar 311 at the top of the main body 1 extend in the transverse direction and are respectively provided with a receiving groove. Each locking assembly 33 comprises a limiting plate 331, a spring 332, a limiting member 333 and a limiting ring 334. The limiting plate 331 extends in the vertical plane in the longitudinal direction and is installed inside the receiving groove. The spring 332 extends in the transverse direction and is connected to one end of the limiting plate 331. The limiting member 333 is movably installed at the side of the receiving groove away from the limiting plate 331 and is connected to the other end of the spring 332. The limiting ring 334 is installed outside the limiting member 333 and is connected to the inner wall of the receiving groove and is adapted to limit the movement of the limiting member 333 in the height direction and the transverse direction, so that when the telescopic section 31 is extended to the position from the main body 1 or the adjacent telescopic section 31, the limiting member 333 prevents the telescopic section 31 above from moving downward in the height direction.

[0065] Through the above arrangement, when the telescopic section 31 is extended to the position from the main body 1 or the adjacent telescopic section 31, under the elastic force of the spring 332, the limiting member 333 moves towards the telescopic rod 312 to limit the relative position between the telescopic section 31 and the main body 1 or the adjacent telescopic section 31. When the telescopic section 31 is retracted towards the main body 1 or the adjacent telescopic section 31, the telescopic section 31 above presses the limiting member 333, and the limiting member 333 moves away from the telescopic rod 312 against the elastic force of the spring 332, so that the telescopic section 31 can be retracted into the main body 1 or the adjacent telescopic section 31.

[0066] It should be noted that the limiting member 333 comprises two spherical sections 336 and a column section 335 between the two spherical sections 336, and when the telescopic section 31 is extended to the position from the main body 1 or the adjacent telescopic section 31, the column section 335 is supported on the edge of the step bar 311 to prevent the telescopic section 31 above from moving downward in the height direction.

[0067] In some example embodiments, with reference to Figures 3-4 A pulling rope 32 is further installed on each telescopic section 31 and is adapted to pull the telescopic section 31, so as to facilitate the maintenance personnel to pull out the telescopic section 31 from the main body 1 or the adjacent telescopic section 31.

[0068] In some example embodiments, with reference to Figures 1-3The main body 1 comprises a rotating side 11 and a rotating shaft side 12. The rotating side 11 is rotatable relative to the rotating shaft side 12. The support 4 comprises a first limiting frame 41 and a second limiting frame 42. The first limiting frame 41 is installed on the bottom of the pit 2 and is configured to allow the bottom of the rotating side 11 of the main body 1 to extend into the first limiting frame 41 when the main body 1 leans against the first side wall 21, so that the main body 1 is kept in the first position. The second limiting frame 42 is installed on the bottom of the pit 2 and is configured to allow the bottom of the rotating side 11 of the main body 1 to extend into the second limiting frame 42 when the main body 1 is perpendicular to the first side wall 21, so that the main body 1 is kept in the second position.

[0069] In the above manner, when the main body 1 is rotated to the first position or the second position, the rotating side 11 of the main body 1 is limited by the first limiting frame 41 or the second limiting frame 42, respectively, so that the ladder climbing assembly is prevented from moving, thereby ensuring the safety of the construction.

[0070] Figure 8 is Figure 1 is a partial enlarged view of part B in FIG. 4.

[0071] In some example embodiments, referring to Figures 1-3 and Figure 8 The first limiting frame 41 comprises a first base 411, a first slot 412 and a first guide plate 413. The first base 411 is configured to be substantially L-shaped, one side wall of which is installed on the first side wall 21 and the other side wall of which is attached to the bottom of the pit 2. The first slot 412 is installed on the first base 411 to allow the bottom of the rotating side 11 of the main body 1 to extend into and limit the movement of the bottom of the rotating side 11 of the main body 1. The first guide plate 413 is installed on the side of the first slot 412 away from the first side wall 21 to guide the rotating side 11 of the main body 1 to extend into or out of the first slot 412.

[0072] It should be noted that in the present embodiment, the first slot 412 is configured to be a substantially U-shaped slot, and the first slot 412 is installed on the side wall of the first base 411 attached to the bottom of the pit 2.

[0073] In some example embodiments, referring to Figures 1-3 and Figure 8The second limiting frame 42 comprises a second base 421, a second slot 422 and a second guide plate 423. The second base 421 comprises a first base plate 4211 and a second base plate 4212 which are connected vertically. The first base plate 4211 is installed on the first side wall 21, and the second base plate 4212 is attached to the bottom of the elevator pit 2. The second slot 422 is installed at the end of the second base plate 4212 to allow the bottom of the rotating side 11 of the main body 1 to extend in and limit the movement of the bottom of the rotating side 11 of the main body 1. The second guide plate 423 is installed obliquely on the side of the second slot 422 facing the rotating track of the main body 1 to guide the rotating side 11 of the main body 1 to extend into or out of the second slot 422.

[0074] It should be noted that in the present embodiment, the second slot 422 is configured as a substantially U-shaped slot body, and the opening end of the second slot 422 faces the first side wall 21.

[0075] Figure 9 is Figure 1 a partial enlarged view of part C in FIG. 6; Figure 10 is Figure 3 a partial enlarged view of part D in FIG. 6.

[0076] In some example embodiments, referring to Figures 1-3 and Figures 9-10 , the ladder assembly further comprises a safety switch 7 and a trigger 8. The safety switch 7 is installed on the first side wall 21 and connected with the safety circuit of the elevator. The trigger 8 is installed on the side of the main body 1 close to the safety switch 7 in the transverse direction, so that during the rotation of the main body 1, the trigger 8 presses the safety switch 7 to disconnect the safety circuit.

[0077] Through the above arrangement, when the maintenance personnel uses the ladder assembly to enter and exit the elevator pit 2, the main body 1 rotates to drive the trigger 8 to press the safety switch 7 to disconnect the safety circuit, thereby ensuring the safety of the maintenance personnel. When the ladder assembly returns to the first position, the safety circuit is connected again.

[0078] In some example embodiments, referring to Figure 9 , the trigger 8 is configured in a substantially cam shape, and the convex part 81 of the trigger 8 faces the safety switch 7.

[0079] According to the example embodiments of the present application, please refer to Figure 1 and Figure 3 , an elevator shaft is provided, which comprises an elevator pit 2 and the ladder assembly for the elevator pit as described in the above embodiments. The ladder assembly is installed inside the elevator pit 2.

[0080] Through the above setting mode, on the one hand, the space occupied by the ladder assembly in the hoistway space is saved, and on the other hand, the maintenance personnel can move the ladder assembly between the storage position and the working position. Even in the case of narrow hoistway space, sufficient space can be provided for the storage and movement of the ladder assembly, facilitating the operation of the maintenance personnel.

[0081] The above specific embodiments further illustrate the purpose, technical solutions and beneficial effects of the present application, and it should be understood that the above only refers to specific embodiments of the present application and is not used to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A ladder assembly for use in an elevator pit, characterized in that, include: The main body (1) is rotatably mounted on the first sidewall (21) of the elevator pit (2) near the entrance on one side extending in the lateral direction; The telescopic part (3) is slidably installed on the upper side of the main body (1), and has a retracted state that extends into the interior of the main body (1) and an extended state that extends out of the main body (1) to change the height of the ladder assembly; as well as The support (4) is installed at the bottom of the elevator pit (2) near the first side wall (21) and is adapted to hold the ladder assembly in a first position against the first side wall (21) or in a second position perpendicular to the first side wall (21).

2. The ladder assembly for an elevator pit according to claim 1, characterized in that, The main body (1) is mounted on the first sidewall (21) by at least one rotating component (5); Each of the rotating components (5) includes: Mounting bracket (51) is mounted on the first sidewall (21); and The rotating frame (52) is connected at one end to the main body (1) and at the other end to the mounting frame (51), so that the main body (1) can rotate relative to the mounting frame (51).

3. The ladder assembly for an elevator pit according to claim 2, characterized in that, The mounting bracket (51) includes two mounting plates (511) that extend parallel to each other in a horizontal plane and face each other, and a connecting plate (512) connecting the two mounting plates (511). The connecting plate (512) is mounted on the first side wall (21). One end of the rotating bracket (52) extends between the two mounting plates (511). A connecting rod (53) passes through the rotating bracket (52) and connects to the two mounting plates (511), so that the rotating bracket (52) can rotate around the connecting rod (53).

4. The ladder assembly for an elevator pit according to claim 3, characterized in that, The ladder assembly also includes: A support frame (6) extends along the height direction and is installed on the first side wall (21), and the connecting plate (512) is installed on the support frame (6).

5. The ladder assembly for an elevator pit according to claim 1, characterized in that, The telescopic part (3) includes: Multiple telescopic sections (31), each of the telescopic sections (31) including a foot pedal (311) and two telescopic rods (312) mounted facing each other at both ends of the foot pedal (311), adjacent telescopic rods (312) being slidably connected, and the lower telescopic rod (312) being slidably mounted on the upper side of the main body (1); and Multiple pairs of locking components (33), each pair of locking components (33) being respectively installed at the two ends of the foot (311) located at the top of the main body (1) or between two adjacent telescopic sections (31) extending in the lateral direction, are configured to restrict the relative position between the telescopic section (31) and the main body (1) or the adjacent telescopic section (31) when the telescopic section (31) extends out of the main body (1) or the adjacent telescopic section (31) into place.

6. The ladder assembly for an elevator pit according to claim 5, characterized in that, Each of the telescopic sections (31) has a receiving groove at each end of the foot (311) extending in the lateral direction, as does the foot (311) located at the top of the main body (1). Each of the locking components (33) includes: A limiting plate (331) extends in a longitudinal vertical plane and is installed inside the receiving groove; A spring (332) extends in the lateral direction and is connected at one end to the limiting plate (331); A limiting member (333) is movably mounted on the side of the receiving groove away from the limiting plate (331) and connected to the other end of the spring (332); and A limiting ring (334) is installed on the outside of the limiting member (333) and connected to the inner wall of the receiving groove. It is used to restrict the movement of the limiting member (333) in the height direction and the lateral direction, so that when the telescopic segment (31) extends out of the main body (1) or the adjacent telescopic segment (31) into place, the limiting member (333) prevents the telescopic segment (31) located above from moving downward in the height direction.

7. The ladder assembly for an elevator pit according to claim 5, characterized in that, Each of the telescopic sections (31) is also equipped with a lifting rope (32) for lifting the telescopic section (31).

8. The ladder assembly for an elevator pit according to claim 1, characterized in that, The main body (1) includes a pivot side (12) connected to the first sidewall (21) and a rotating side (11) that rotates about the pivot side (12); the support part (4) includes: A first limiting bracket (41), installed at the bottom of the elevator pit (2), is configured such that, when the main body (1) rests against the first side wall (21), the bottom of the rotating side (11) of the main body (1) extends into the interior of the first limiting bracket (41), thereby keeping the main body (1) in the first position; and The second limiting bracket (42) is installed at the bottom of the elevator pit (2) and is configured such that when the main body (1) is perpendicular to the first side wall (21), the bottom of the rotating side (11) of the main body (1) extends into the interior of the second limiting bracket (42), so that the main body (1) is held in the second position.

9. The ladder assembly for an elevator pit according to claim 8, characterized in that, The first limiting frame (41) includes: The first base (411) is constructed in a generally L-shape, with one side wall mounted on the first side wall (21) and the other side wall attached to the bottom of the elevator pit (2); A first slot (412) is mounted on the first base (411) to allow the bottom of the rotating side (11) of the main body (1) to extend into it and to restrict movement of the bottom of the rotating side (11) of the main body (1); and A first guide plate (413) is obliquely mounted on the side of the first slot (412) away from the first sidewall (21) to guide the rotating side (11) of the main body (1) into or out of the first slot (412).

10. The ladder assembly for an elevator pit according to claim 8, characterized in that, The second limiting frame (42) includes: The second base (421) includes a first substrate (4211) and a second substrate (4212) connected vertically. The first substrate (4211) is mounted on the first sidewall (21), and the second substrate (4212) is attached to the bottom of the elevator pit (2). A second slot (422) is mounted at the end of the second substrate (4212) to allow the bottom of the rotating side (11) of the main body (1) to extend into it and to restrict movement of the bottom of the rotating side (11) of the main body (1); and The second guide plate (423) is obliquely installed on one side of the second slot (422) facing the rotation path of the main body (1) to guide the rotation side (11) of the main body (1) into or out of the second slot (422).

11. The ladder assembly for an elevator pit according to claim 1, characterized in that, The ladder assembly also includes: A safety switch (7) is installed on the first side wall (21) and connected to the safety circuit of the elevator; and A trigger (8) is installed on the side of the main body (1) in the lateral direction close to the safety switch (7), such that during the rotation of the main body (1), the trigger (8) presses the safety switch (7) to disconnect the safety circuit.

12. The ladder assembly for an elevator pit according to claim 11, characterized in that, The trigger (8) is configured in a generally cam shape, with the protrusion (81) of the trigger (8) facing the safety switch (7).

13. An elevator shaft, characterized in that, include: Elevator pit (2); as well as The ladder assembly for the elevator pit according to any one of claims 1-12 is installed inside the elevator pit (2).

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