Crawling ladder assembly of hoistway pit and elevator

Abstract

The utility model requests to protect a crawling ladder assembly of a shaft pit and an elevator, the crawling ladder assembly comprises a crawling ladder keel, a crawling ladder body and a trigger switch, and the crawling ladder keel is used for being fixedly connected with the shaft pit; the crawling ladder body is connected to the crawling ladder keel in a sliding manner, and the crawling ladder body can slide up and down on the crawling ladder keel when being pressed; the trigger switch is arranged on a gliding path of the ladder stand body, and the trigger switch can be triggered by the gliding ladder stand body and used for cutting off an elevator safety circuit. When the ladder stand assembly is applied to an elevator, the trigger switch is triggered when the ladder stand body is pressed, so that an elevator safety circuit can be automatically cut off when elevator maintenance personnel enter a shaft pit by using the ladder stand body, and the elevator can be ensured to be in a running forbidding state; the effect of protecting the personal safety of the elevator maintainer is achieved, and the protection level of the ladder stand assembly to the elevator maintainer is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to elevator shaft ladder related technical field, especially, it is related to a kind of ladder assembly and elevator of shaft pit. BACKGROUND

[0002] Elevator shaft pit is usually configured with ladder, and elevator maintenance personnel can enter into elevator shaft pit by means of ladder to complete corresponding maintenance work.

[0003] It can be understood that elevator maintenance personnel entering into elevator shaft pit has a set of safety step process with relevant regulations to ensure that elevator is in prohibited operation state when elevator maintenance personnel enters into elevator shaft pit and completes corresponding work.However, since the standard elevator shaft pit entering step is more complex, elevator maintenance personnel on site is prone to miss a certain safety step and enter into elevator shaft pit recklessly in emergency.Especially, elevator maintenance personnel forgets to press emergency stop switch after entering elevator shaft, or is limited by the condition of shaft pit, and cannot press emergency stop switch at elevator door.In this way, it is inevitable that there is a major safety hazard when elevator maintenance personnel enters into shaft pit. SUMMARY

[0004] Therefore, it is necessary to provide a kind of ladder assembly and elevator of shaft pit, which can ensure that elevator is in prohibited operation state when elevator maintenance personnel enters into shaft pit.

[0005] A kind of ladder assembly of shaft pit, the ladder assembly includes:

[0006] Ladder keel is used to fixedly connect shaft pit;

[0007] Ladder body is slidably connected to the ladder keel, and the ladder body can slide up and down on the ladder keel when being pressed;

[0008] Trigger switch is arranged on the sliding path of the ladder body, and the trigger switch can be triggered by the ladder body sliding down, for cutting off elevator safety circuit.

[0009] It can be understood that the trigger switch is triggered by the ladder body when being pressed, so that the automatic cutting of elevator safety circuit can be realized when elevator maintenance personnel uses the ladder body to enter into shaft pit, which can ensure that elevator is in prohibited operation state, and play a role in protecting the personal safety of elevator maintenance personnel, and greatly improve the protection level of the ladder assembly to elevator maintenance personnel.

[0010] In one embodiment, the ladder body includes a plurality of rungs, and the plurality of rungs are arranged in sequence along the depth direction of the shaft pit.

[0011] The trigger switch comprises a trigger member, which can be pressed by one of the rungs to trigger the trigger switch.

[0012] It can be understood that the trigger switch is triggered by the rungs of the ladder body, so that the ladder body does not need to increase corresponding structures to trigger the trigger switch, thereby simplifying the structure of the ladder body.

[0013] In one embodiment, the ladder keel comprises a keel and a bottom plate, the keel is arranged through the ladder body and is in sliding connection with the ladder body, and the bottom plate is arranged at one end of the keel passing through the ladder body and is connected with the keel, for fixedly connecting the ground of the pit.

[0014] The trigger switch is mounted on the bottom plate, and the trigger switch can be triggered by one of the rungs adjacent to the ground of the pit on the ladder body.

[0015] In one embodiment, the trigger switch further comprises a reset member, which is in abutment with the trigger member.

[0016] When the trigger member loses the pressing of the corresponding rung, the reset member can reset the trigger member.

[0017] It can be understood that the reset member is used to reset the trigger member, so that the trigger switch has an automatic reset function to meet the repeated use of the trigger switch, without manual operation of the elevator maintenance personnel, thereby reducing the work intensity of the elevator maintenance personnel.

[0018] In one embodiment, the bottom plate comprises a first plate body and a second plate body, the first plate body is used to abut and connect the ground of the pit, and the second plate body is perpendicularly connected to the first plate body.

[0019] The trigger switch is mounted on the second plate body, and the installation of the trigger switch and the second plate body in the depth direction of the pit can be adjusted.

[0020] It can be understood that the position of the trigger switch in the depth direction of the pit can be adjusted to adjust the sensing sensitivity of the trigger switch, so that the trigger switch can be triggered when the ladder body is pressed to descend.

[0021] In one embodiment, the ladder keel comprises a keel, the keel is arranged through the ladder body and is in sliding connection with the ladder body.

[0022] The elastic member is pre-compressed and abuts against the ladder body to drive the ladder body to reset.

[0023] It can be understood that the elastic pushing of the ladder body by the elastic member can realize the automatic resetting of the ladder body on the ladder keel.

[0024] In one of the embodiments, the number of the ladder keels is two, and the two ladder keels are arranged on the two sides of the ladder body.

[0025] It can be understood that the sliding guiding of the ladder body by the ladder keels arranged on the two sides of the ladder body can improve the stability of the ladder body during movement.

[0026] In one of the embodiments, the ladder keel comprises a keel, which is arranged in the ladder body and is in sliding connection with the ladder body.

[0027] The fixed support is connected to the part of the keel that penetrates the ladder body towards the pit entrance, and is used to fixedly connect the shaft pit.

[0028] It can be understood that the structure of the fixed support can realize the fixation of the keel on the shaft pit, and prevent the upward dislocation of the ladder body on the keel.

[0029] In one of the embodiments, the fixed support comprises a connecting sleeve, a connecting rod and a fixed plate, the connecting rod is arranged between the connecting sleeve and the fixed plate, and is connected with the connecting sleeve and the fixed plate respectively.

[0030] The connecting sleeve is sleeved on the keel and is in sliding cooperation with the keel, and the fixed plate is used to abut and connect the wall surface of the shaft pit.

[0031] It can be understood that the above structure can facilitate the fixation of the keel to the shaft pit by the fixed support.

[0032] The application further provides an elevator comprising the above ladder assembly.

[0033] Due to the application of the above technical solutions, the present application has the following advantages compared with the prior art:

[0034] The application relates to a ladder assembly of a hoistway pit and an elevator, which triggers a trigger switch when the ladder body is pressed, so that the elevator maintenance personnel can automatically cut off the safety return circuit of the elevator when entering the hoistway pit by using the ladder body, thus ensuring that the elevator is in a prohibited operation state, playing a role in protecting the personal safety of the elevator maintenance personnel, and greatly improving the protection level of the ladder assembly on the elevator maintenance personnel. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application or in the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0036] Figure 1 The structural schematic diagram of the ladder assembly provided by the present application.

[0037] Figure 2 The structural schematic diagram of the ladder assembly provided by the present application. Figure 1 The enlarged view of the P part in the middle.

[0038] Figure 3 The structural schematic diagram of the ladder assembly provided by the present application. Figure 1 The enlarged view of the Q part in the middle.

[0039] Figure 4 The exploded view of the ladder keel in the present application.

[0040] Reference signs: 100, ladder assembly; 10, ladder keel; 11, keel; 12, bottom plate; 121, first plate body; 122, second plate body; 13, fixed support; 131, connecting sleeve; 132, connecting rod; 133, fixed plate; 20, ladder body; 21, guide pipe; 211, abutting plate; 22, crosspiece; 30, trigger switch; 31, trigger; 32, fixed plate; 321, waist-shaped hole; 110, elastic member. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0042] It is to be noted that when an element is referred to as being "on" another element, it can be directly on the other element or intervening elements can also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can also be present. When an element is referred to as being "fixed" to another element, it can be directly fixed to the other element or intervening elements can also be present.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for describing particular embodiments only and is not intended to be limiting of the application. All publications, patent applications, patents, and other references mentioned herein are incorporated by reference in their entirety for the teachings relevant to the sentence and / or paragraph in which the reference is presented.

[0044] As shown in Figures 1 to 4 The present application provides a ladder assembly 100 for a shaft pit, which comprises a ladder frame 10, a ladder body 20 and a trigger switch 30. The ladder frame 10 is used to fixedly connect the shaft pit (not shown in the figure). The ladder body 20 is slidably connected to the ladder frame 10, and the ladder body 20 can slide up and down on the ladder frame 10 when it is pressed. The trigger switch 30 is arranged on the downward sliding path of the ladder body 20, and the trigger switch 30 can be triggered by the ladder body 20 sliding downward, and is used to cut off the elevator safety circuit. Here, the pressure on the ladder body 20 specifically refers to the downward pressure generated by the elevator maintenance personnel stepping on the ladder body 20. It should be noted that the trigger switch 30 can specifically control the control panel (not shown in the figure) of the elevator safety switch (not shown in the figure) to be electrically connected. When the trigger switch 30 is triggered by the ladder body 20, the control panel can switch the elevator safety circuit to be cut off through the safety switch, so that the elevator is in a prohibited running state.

[0045] As can be seen from the above, when the ladder assembly 100 of the present application is applied to an elevator, the trigger of the trigger switch 30 by the ladder body 20 when it is pressed enables the automatic cutting off of the elevator safety circuit when the elevator maintenance personnel uses the ladder body 20 to enter the shaft pit, so that the elevator is in a prohibited running state, thereby playing a role in protecting the personal safety of the elevator maintenance personnel and greatly improving the protection level of the ladder assembly 100 for the elevator maintenance personnel.

[0046] As shown in Figure 1 , Figure 3 and Figure 4As shown in the drawings, in an embodiment, the ladder keel 10 comprises a keel 11 and a bottom plate 12, the keel 11 is arranged through the ladder body 20 and is in sliding connection with the ladder body 20, and the bottom plate 12 is arranged at one end of the keel 11 passing through the ladder body 20 and is connected with the keel 11, and is used for fixedly connecting the pit ground. Here, the keel 11 extends along the depth direction of the shaft pit, and the bottom plate 12 is specifically connected with the pit ground in a threaded connection manner by means of screws or bolts, so that the stability of the ladder keel 10 when fixed in the shaft pit can be improved.

[0047] As shown in the drawings, Figure 1 , Figure 2 and Figure 4 , in an embodiment, the keel 11 is connected with a fixed support 13 on the part of the keel 11 passing out of the ladder body 20 towards the pit entrance (not shown in the drawings), the fixed support 13 is used for fixedly connecting the shaft pit, and the fixed support 13 can abut against and limit the ladder body 20 in the depth direction of the shaft pit. So that the fixed support 13 can realize the fixation of the keel 11 in the shaft pit on the one hand, and can prevent the ladder body 20 from being dislocated upward on the keel 11 on the other hand.

[0048] As can be seen from the above, in the ladder keel 10 of the present application, one end of the keel 11 passing out of the ladder body 20 is connected and fixed with the shaft pit through the fixed support 13, and the other end of the keel 11 passing out of the ladder body 20 is connected and fixed with the pit ground through the bottom plate 12, so that the two ends of the keel 11 are fixed, which can improve the stability of the keel 11 when fixed in the shaft pit, and can stably support the ladder body 20.

[0049] As shown in the drawings, Figure 2 , Figure 4 , in an embodiment, the fixed support 13 comprises a connecting sleeve 131, a connecting rod 132 and a fixed plate 133, the connecting rod 132 is arranged between the connecting sleeve 131 and the fixed plate 133 and is connected with the connecting sleeve 131 and the fixed plate 133 respectively; wherein the connecting sleeve 131 is sleeved on the keel 11 and is in sliding cooperation with the keel 11, and the fixed plate 133 is used for abutting against and connecting the wall surface (not shown in the drawings) of the shaft pit. That is to say, the fixed support 13 only needs to be sleeved on the keel 11 by means of the connecting sleeve 131, so as to realize the assembly and fixation of the keel 11 on the wall surface of the shaft pit, which can facilitate the assembly and connection between the fixed support 13 and the keel 11, and facilitate the fixation of the keel 11 to the shaft pit through the fixed support 13. Here, the connecting sleeve 131 is matched with the keel 11, and the keel 11 can be specifically a round pipe or a square pipe. It should be noted that the fixed plate 133 can be pressed and fixed to the wall surface of the shaft pit by means of connecting members such as screws.

[0050] As shown in the drawings, Figure 1As shown in the figure, in an embodiment, the number of ladder keels 10 is configured as two, and the two ladder keels 10 are arranged on both sides of the ladder body 20. That is, this embodiment uses two ladder keels 10 to jointly bear the ladder body 20, which can improve the stability of the ladder body 20 when moving. Here, the keel 11 of the two ladder keels 10 can be arranged through the two guide pipes 21 on both sides of the ladder body 20. It can be understood that in other embodiments, the number of ladder keels 10 can also be one, three, or even more. When the number of ladder keels 10 is one, the keel 11 of the ladder keel 10 can be arranged through the guide pipe located at the middle position of the ladder body 20, and when the number of ladder keels 10 is three or more, multiple ladder keels 10 can be arranged in sequence along the width direction of the ladder body 20.

[0051] As shown in the figure, Figure 1 , Figure 3 As shown in the figure, in an embodiment, the part of the keel 11 that penetrates out of the ladder body 20 towards the pit ground is sleeved with an elastic element 110, and the elastic element 110 is in pre-compressed abutment with the ladder body 20, which is used to drive the ladder body 20 to reset. That is, when the elevator maintenance personnel leaves the ladder body 20, the ladder body 20 can be automatically reset under the elastic pushing of the elastic element 110. Here, the elastic element 110 is arranged in a pre-compressed manner on the abutment plate 211 connected to the end of the guide pipe 21 of the ladder body 20 and the bottom plate 12, and the elastic element 110 can be specifically configured as a spring, a rubber sleeve or other high-elasticity accessories. It needs to be noted that the elastic deformation of the elastic element 110 sleeved on the keel 11 should not be too large after being stressed, because too large elastic deformation will cause the displacement of the ladder body 20 to be too large, thereby causing the risk of falling off without preparation when the elevator maintenance personnel climbs the ladder body 20.

[0052] As shown in the figure, Figure 1 As shown in the figure, in an embodiment, the ladder body 20 includes a plurality of rungs 22, which are arranged in sequence along the depth direction of the shaft pit. Specifically, the plurality of rungs 22 are arranged in sequence and spaced apart between the two guide pipes 21 along the depth direction of the shaft pit; and the trigger switch 30 includes a trigger element 31, which can be pressed by one of the rungs 22 to trigger the trigger switch 30. That is, the ladder body 20 can use the self-provided rungs 22 to trigger the trigger switch 30, so that the ladder body 20 does not need to increase corresponding structures for triggering the trigger switch 30, which has the effect of simplifying the structure of the ladder body 20. Here, the trigger switch 30 is configured as a microswitch, a travel switch, etc.

[0053] As shown in the figure, Figure 1 , Figure 3As shown, in one embodiment, the trigger switch 30 is installed on the base plate 12 of the ladder frame 10, and the trigger switch 30 can be triggered by a crossbar 22 on the ladder body 20 adjacent to the pit floor. That is, in this embodiment, the trigger switch 30 can be triggered by the lowest crossbar 22 in the ladder body 20, so that the base plate 12 of the ladder frame 10, in addition to assembling and fixing the frame 11 in the pit, can also be used to support the trigger switch 30, achieving a dual purpose. It is understood that in other embodiments, the trigger switch 30 can also be triggered by other crossbars 22 in the ladder body 20. Therefore, the trigger switch 30 can be installed on the wall of the pit. When the trigger switch 30 is triggered by a crossbar 22 near the pit entrance, the trigger element 31 on the trigger switch 30 can be configured as a manual reset structure, allowing elevator maintenance personnel to manually reset the trigger element 31 after climbing out of the pit. This will not be elaborated further here.

[0054] In this embodiment, the trigger switch 30 also includes a reset member (not shown), which abuts against the trigger member 31. Furthermore, when the trigger member 31 loses the pressure of the corresponding crossbar 22, the reset member can drive the trigger member 31 to reset, thus meeting the reusability requirements of the trigger switch 30. In other words, the trigger switch 30 has an automatic reset function, eliminating the need for manual operation by elevator maintenance personnel and reducing their workload. Specifically, the reset member can be configured with a compression spring, torsion spring, etc., to drive the trigger member 31 to elastically reset. It should be noted that after the trigger member 31 on the trigger switch 30 is reset by the reset member, the trigger switch 30 will not control the opening of the elevator safety circuit.

[0055] like Figure 3 , Figure 4 As shown, in this embodiment, the base plate 12 includes a first plate 121 and a second plate 122. The first plate 121 is used to abut and connect to the pit floor, and the second plate 122 is vertically connected to the first plate 121. A trigger switch 30 is mounted on the second plate 122, and the installation position of the trigger switch 30 and the second plate 122 in the depth direction of the pit can be adjusted. That is, by adjusting the installation position of the trigger switch 30 in the depth direction of the pit, the sensitivity of the trigger switch can be adjusted, thus ensuring that the trigger switch 30 is triggered when the ladder body 20 is subjected to pressure and descends.

[0056] like Figure 3As shown, in this embodiment, a waist-shaped hole 321 is formed on the fixing plate 32 of the trigger switch 30 for fixing to the second plate body 122, and when the fixing plate 32 is attached to the second plate body 122, a bolt (not shown in the figure) passing through the waist-shaped hole 321 and the second plate body 122 is used to press and fix the fixing plate 32 to the second plate body 122, so as to realize the assembly of the trigger switch 30 on the second plate body 122. In this way, the trigger switch 30 can use the structural characteristics of the waist-shaped hole 321 to realize the adjustment of the installation position of the trigger switch 30 in the depth direction of the shaft pit with respect to the second plate body 122.

[0057] In addition, the application further provides an elevator comprising the ladder climbing assembly 100.

[0058] The technical features of the above embodiments can be combined in any manner. In order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, but as long as the combinations of the technical features do not contradict, they should be considered as falling within the scope of the present application.

[0059] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present application, and are not used as a limitation of the present application. Any appropriate changes and variations to the above embodiments within the spirit and principles of the present application should be considered as falling within the scope of the present application.

Claims

1. A ladderway pit's ladder assembly, characterized by, The ladder assembly (100) comprises: a ladder frame (10) fixedly connected in a pit of a hoistway; a ladder body (20) slidably connected to the ladder frame (10), and capable of sliding up and down on the ladder frame (10) when the ladder body (20) is pressed; a trigger switch (30) arranged on a sliding path of the ladder body (20), and capable of being triggered by the ladder body (20) to cut off a safety circuit of an elevator.

2. The ladder assembly of claim 1, wherein, The ladder body (20) comprises a plurality of rungs (22) arranged in sequence and spaced apart along a depth direction of the pit of the hoistway. The trigger switch (30) comprises a trigger (31) capable of being pressed by one of the rungs (22) to trigger the trigger switch (30).

3. The ladder assembly of claim 2, wherein, The ladder frame (10) comprises a frame (11) and a base plate (12), the frame (11) is arranged through the ladder body (20) and slidably connected to the ladder body (20), and the base plate (12) is arranged at one end of the frame (11) passing through the ladder body (20) and connected to the frame (11) to fixedly connect a ground surface of the pit. The trigger switch (30) is mounted on the base plate (12), and the trigger switch (30) can be triggered by one of the rungs (22) adjacent to the ground surface of the pit.

4. A ladder assembly for a shaft pit according to claim 2 or 3, wherein, The trigger switch (30) further comprises a reset member abutting against the trigger (31). When the trigger (31) loses the pressing of the corresponding rung (22), the reset member can reset the trigger (31).

5. The shaft pit ladder assembly of claim 3, wherein, The base plate (12) comprises a first plate body (121) for abutting against and connecting the ground surface of the pit and a second plate body (122) connected to the first plate body (121). The trigger switch (30) is mounted on the second plate body (122), and the mounting of the trigger switch (30) and the second plate body (122) in the depth direction of the pit of the hoistway can be adjusted.

6. The shaft pit ladder assembly of claim 1, wherein, The ladder frame (10) comprises a frame (11) arranged through the ladder body (20) and slidably connected to the ladder body (20). The frame (11) is sleeved with an elastic member (110) on a portion of the frame (11) passing out of the ladder body (20) towards the ground surface of the pit, the elastic member (110) abuts against the ladder body (20) in a pre-compressed manner to reset the ladder body (20).

7. The shaft pit ladder assembly of claim 1, wherein, The number of the ladder frames (10) is two, and the two ladder frames (10) are arranged on both sides of the ladder body (20).

8. The shaft pit ladder assembly of claim 1, wherein, The ladder frame (10) comprises a frame (11) arranged through the ladder body (20) and slidably connected to the ladder body (20). The keel (11) is connected with a fixed support (13) on the part of the ladder body (20) penetrating out of the pit entrance, the fixed support (13) is used for fixedly connecting the shaft pit; and the fixed support (13) can be abutted and limited with the ladder body (20) in the depth direction of the shaft pit.

9. The shaft pit ladder assembly of claim 8, wherein, The fixed support (13) comprises a connecting sleeve (131), a connecting rod (132) and a fixed plate (133), the connecting rod (132) is arranged between the connecting sleeve (131) and the fixed plate (133) and connected with the connecting sleeve (131) and the fixed plate (133) respectively; The connecting sleeve (131) is sleeved on the keel (11) and is in sliding fit with the keel (11), and the fixed plate (133) is used for abutting and connecting the wall surface of the shaft pit.

10. An elevator, characterized by The ladder assembly (100) comprises the ladder body (100) and the fixed support (13) connected with the ladder body (100).

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