CN211950301U - Elevator pit cat ladder - Google Patents

Abstract

The utility model discloses an elevator pit cat ladder, including base, connecting rod, ladder body, extension spring and fixture block, base fixed mounting is on the pit wall, and the one end of two connecting rods respectively with the articulated installation of base, the ladder body erect put and articulated with the other end of two connecting rods, and extension spring one end is fixed in the pit wall, the other end is fixed in the ladder body, and on two fixture blocks were fixed in the pit wall of base top, when the cat ladder draws in, the ladder body was erect and is blocked in between two fixture block archs and pit wall. The utility model discloses, convenient to use, and through the dual setting of extension spring with the fixture block, improved the reliability of cat ladder greatly, especially ensured that the ladder body can not expand because of extension spring inefficacy or the unexpected condition in drawing in the back to make the security that the cat ladder used higher.

Description

Elevator pit cat ladder

Technical Field

The utility model relates to an elevator installation repair tools field especially relates to an elevator pit cat ladder.

Background

The elevator building structure is composed of a machine room, a hoistway, a landing door entrance, a pit and the like. As a part of an elevator building structure, a pit is a hoistway part below a lowest landing, and a buffer, a tension pulley, an emergency stop switch, a drainage device, and the like are generally provided therein. According to the rules of the thirty item of special equipment safety supervision regulation of the national service institute of the people's republic of China 549, the accessory A table A of the elevator maintenance rule A-1 half-month maintenance project (content) and requirements, the elevator is required to be cleaned, lubricated, adjusted and checked at least once every 15 days, and the pit environment and the pit stopping device are required to be maintained and maintained every half-month maintenance and maintenance; in addition, according to the fifth rule (nine) of TSG T5002-2017 elevator maintenance rule, and the fifth rule (nine) of TSG T7001-2009 elevator supervision and inspection rule-traction and forced drive elevator rule, it is known that the self-inspection, supervision and inspection, and periodic inspection of the elevator are also required to enter the pit. For safe access to the pit, article 5.7.3.2 of GB7588-2003 "elevator manufacturing and installation safety code" specifies that "a door should be provided into the pit if the pit depth is greater than 2.50m and the layout of the building allows. If no other channel exists, in order to facilitate the maintainer to safely enter the pit, a permanent device which enters the pit from a landing door is arranged in the pit and cannot protrude into the running space of the elevator, and in the actual elevator building, a ladder stand is basically arranged to enter and exit the pit.

The existing elevator pit ladder stand is mostly directly fixed on the wall of a pit. Because the well space is limited, the cat ladder can not be protruded into the space where the elevator operates to influence the normal operation of the elevator, so that the distance between the foot bar and the wall of the pit is shorter in the existing cat ladder directly fixed on the wall of the pit, which is not beneficial to stepping and inconvenient in crawling.

Disclosure of Invention

An object of the utility model is to provide an elevator pit cat ladder.

Realize the utility model discloses the technical scheme of purpose is: an elevator pit ladder stand comprises a base, connecting rods, a ladder body, tension springs and clamping blocks, wherein the base is fixedly installed on a pit wall, one ends of the two connecting rods are respectively hinged with the base, the axial lead of the two connecting rods hinged with the base is horizontal and is positioned on the same straight line, the ladder body is vertically arranged and is hinged with the other ends of the two connecting rods, the axial lead of the two connecting rods hinged with the ladder body is horizontal and is positioned on the same straight line, one end of each tension spring is fixed on the pit wall, the other end of each tension spring is fixed on the ladder body, the horizontal position of the connection point of each tension spring and the pit wall is higher than that of the connection point of each tension spring and the ladder body, the two clamping blocks are fixed on the pit wall above the base, two opposite inner side surfaces of the free ends of the two clamping blocks extend to opposite sides, the distance between the protruding pointed ends of the two clamping blocks is smaller than the width of the ladder body, when the ladder stand is folded, the ladder body is erected and clamped between the two clamping block protrusions and the bottom pit wall, a gap is formed between the ladder body and the bottom pit ground, and the sum of the length of the ladder body from the hinged point of the connecting rod to the lower end of the ladder body and the length of the connecting rod is larger than the distance from the hinged point of the connecting rod and the base to the bottom pit ground.

Furthermore, a fixed contact is arranged on the pit wall, a movable contact is arranged on the ladder body, the fixed contact on the pit wall is arranged on the moving path of the movable contact, when the ladder stand is folded, the movable contact of the ladder body is close to and contacts with the fixed contact on the pit wall, and the alarm system gives out a prompt. This setting, according to the suggestion that alarm system sent, can detect the state of cat ladder often, if receive the suggestion, then the ladder body is the state of drawing in, does not receive the suggestion, and then the ladder body does not draw in to can judge whether the current state of cat ladder meets the requirement, for example the cat ladder draws in the back, if because of unexpected expansion, alarm system does not send the suggestion, then explains the ladder body and does not reset, thereby can in time shut down, ensures elevator operation safety.

When the ladder is unfolded for use, the ladder body is horizontally pushed to be moved out from the space between the two clamping blocks and rotates by the hinging point of the two connecting rods and the base, and simultaneously, the ladder body rotates relative to the connecting rods to be in an inclined state, so that the lower end of the ladder body finally stands on the ground of a pit, and the upper end of the ladder body leans against the wall of the pit; when the ladder stand is folded after use, the ladder body is folded under the action of the tension spring, automatically reset to a non-working state, and vertically clamped between the two clamping block bulges and the wall of the pit. This elevator pit cat ladder can draw in when not, can expand during the use, when drawing in, because erect completely, the interval between ladder body and pit wall is less, and the ladder body is more close to the pit wall promptly, and influence elevator normal operating in the ladder body can not protruding into the space of elevator operation, and when expanding the use, the pit wall is kept away from to the ladder body, and especially the lower part of ladder body is great with the interval between pit wall, tramples the convenience, does benefit to and crawls. The utility model discloses, convenient to use, and it is setting up the extension spring to on the basis that the ladder body can not expand when guaranteeing to draw in, through the setting of two fixture blocks, make the ladder body of card between two fixture block archs and pit wall under two fixture block bellied spacing, also can't deviate from two fixture blocks and expand, the dual setting of extension spring and fixture block has improved the reliability of cat ladder greatly, especially has ensured that the ladder body can not expand because of extension spring inefficacy or the unexpected condition after drawing in, thereby makes the security that the cat ladder used higher.

Drawings

Fig. 1 is a schematic structural view of the elevator pit ladder of the utility model when folded;

fig. 2 is a schematic view of the overhead structure of the elevator pit ladder of the present invention when it is folded;

FIG. 3 is an enlarged schematic view of section A of FIG. 2;

fig. 4 is the structure schematic diagram of the elevator pit ladder of the utility model when expanding.

Detailed Description

The detailed description of the embodiments of the ladder stand for elevator pit of the present invention is provided below with reference to the accompanying drawings:

as shown in fig. 1 to 4, an elevator pit ladder stand comprises a base 1, two connecting rods 2, a ladder body 3, a tension spring 4 and fixture blocks 5, wherein the base 1 is fixedly installed on a pit wall 10, one end of each of the two connecting rods 2 is hinged with the base 1, the axis line of the two connecting rods 2 hinged with the base 1 is horizontal and is positioned on the same straight line, the ladder body 3 is vertically arranged and is hinged with the other end of the two connecting rods 2, the axis line of the two connecting rods 2 hinged with the ladder body 3 is horizontal and is positioned on the same straight line, one end of the tension spring 4 is fixed on the pit wall 10, the other end of the tension spring is fixed on the ladder body 3, the horizontal position of the connection point of the tension spring 4 and the pit wall 10 is higher than the horizontal position of the connection point of the tension spring 4 and the ladder body 3, the two fixture blocks 5 are fixed on the pit wall 10 above the base 1, two opposite inner opposite sides of the free ends of the two fixture blocks 5 extend with bulges 51, the distance, the distance L3 between the tips of the protrusions 51 of the two blocks 5 and the pit wall 10 is larger than the distance L4 between the outer side surface of the ladder body 3 and the pit wall 10 when the ladder is folded, the ladder body 3 is erected and clamped between the protrusions 51 of the two blocks and the pit wall 10, a gap is formed between the ladder body 3 and the pit floor 20, and the sum of the length L5 of the ladder body 3 from the hinge point of the ladder body 3 and the connecting rod 2 to the lower end thereof and the length L6 of the connecting rod 2 is larger than the distance L7 from the hinge point of the connecting rod 2 and the base 1 to the pit floor.

In the elevator pit ladder of the utility model, the axial lead of the two connecting rods 2 hinged with the base 1 is horizontal and positioned on the same straight line, and the axial lead of the two connecting rods 2 hinged with the ladder body 3 is horizontal and positioned on the same straight line, so that the ladder body 3 can be rotated and unfolded; the distance L1 between the tips of the protrusions 51 of the two fixture blocks 5 is smaller than the width L2 of the ladder body 3, so that the protrusions 51 of the two fixture blocks 5 can clamp the ladder body 3 clamped between the protrusions and the pit wall 10; the distance L3 between the tips of the protrusions 51 of the two clamping blocks 5 and the pit wall 10 is larger than the distance L4 between the outer side surface of the ladder body 3 and the pit wall 10 when the ladder is folded, so that the ladder body 3 can move back to a gap between the protrusions 51 of the two clamping blocks and the pit wall 10 when the ladder is folded; the horizontal position of the connection point of the tension spring 4 and the pit wall 10 is higher than the horizontal position of the connection point of the tension spring 4 and the ladder body 3, and the ladder body 3 can be automatically folded under the action of the tension spring 4 when not in use; the ladder body 3 has a gap with the ground of the pit, the sum of the length L5 from the hinged point of the connecting rod 2 to the lower end of the ladder body 3 and the length L6 of the connecting rod 2 is greater than the distance L7 from the hinged point of the connecting rod 2 and the base 1 to the ground of the pit 20, the arrangement is such that the ladder body 3 can be unfolded, and when the ladder body 3 is unfolded, the lower end of the ladder body can be butted against the ground of the pit.

When the ladder stand is unfolded for use, the ladder body 3 is horizontally pushed to move out from the space between the two clamping blocks 5 and rotate by the hinging point of the two connecting rods 2 and the base 1, and simultaneously, the ladder body 3 per se rotates relative to the connecting rods 2 to be in an inclined state, so that finally the lower end of the ladder body 3 stands on the ground of a pit, and the upper end of the ladder body is close to the wall 10 of the pit; when the ladder stand is folded after use, the ladder body 3 is folded under the action of the tension spring 4, automatically returns to a non-working state, and is erected and clamped between the two fixture block bulges 51 and the pit wall 10.

The utility model discloses elevator pit cat ladder, not the time spent can draw in, can expand during the use, when drawing in, because erect completely, the interval between ladder body 3 and pit wall 10 is less, and ladder body 3 is more close to pit wall 10 promptly, and ladder body 3 can not influence elevator normal operating in the protruding space of elevator operation, when expanding the use, and ladder body 3 keeps away from pit wall 10, especially ladder body 3's lower part, and is great with the interval between pit wall 10, tramples the convenience, does benefit to and crawls. The utility model discloses, high durability and convenient use, and it is setting up extension spring 4, on the basis that ladder body 3 can not expand when guaranteeing to draw in, through the setting of two fixture blocks 5, make ladder body 3 of card between two fixture block archs 51 and pit wall 10 under two fixture block archs 51 spacing, also can't deviate from two fixture blocks 5 and expand, extension spring 4 and fixture block 5's dual setting has improved the reliability of cat ladder greatly, especially ensured that ladder body 3 can not expand because of extension spring 4 inefficacy or the unexpected condition after drawing in, thereby make the security that the cat ladder used higher.

The utility model discloses elevator pit cat ladder blocks 3 ladders between two fixture block archs 51 and pit wall 10, or when shifting out ladder body 3 by two fixture blocks 5 within a definite time, only need use certain effort, makes two fixture blocks 5 outwards produce the deformation that can restore slightly can. The ladder body 3 is moved out from the space between the two clamping blocks 5 by using a certain acting force, namely, after the ladder body 3 is clamped between the two clamping block bulges 51 and the pit wall 10, the ladder body cannot be separated from the space between the two clamping blocks 5 under the condition of no force application, and the structure is reliable in installation.

The utility model discloses elevator pit cat ladder, preferably, be equipped with a static contact 61 on the pit wall 10, be equipped with a moving contact 62 on the ladder body 3, static contact 61 on the pit wall 10 is on moving contact 62's removal route, and when the cat ladder draws in, ladder body 3's moving contact 62 is close to and contacts static contact 61 on the pit wall 10, and alarm system sends the suggestion. This setting, according to the suggestion that alarm system sent, can detect the state of cat ladder often, if receive the suggestion, then ladder body 3 is the folded state, does not receive the suggestion, and then ladder body 3 does not fold in to can judge whether the current state of cat ladder meets the requirement, for example the cat ladder folds in the back, if expand because of the accident, alarm system does not send the suggestion, then explains ladder body 3 and does not reset, thereby can in time shut down, ensures elevator operation safety.

The utility model discloses right the utility model belongs to the technical field of the ordinary skilled person, do not deviating from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.

Claims (2)

1. The utility model provides an elevator pit cat ladder which characterized in that: the ladder comprises a base, connecting rods, a ladder body, tension springs and clamping blocks, wherein the base is fixedly arranged on a pit wall, one ends of the two connecting rods are respectively hinged with the base, an axial lead of the two connecting rods, which is hinged with the base, is horizontal and is positioned on the same straight line, the ladder body is vertically arranged and is hinged with the other ends of the two connecting rods, an axial lead of the two connecting rods, which is hinged with the ladder body, is horizontal and is positioned on the same straight line, one end of each tension spring is fixed on the pit wall, the other end of each tension spring is fixed on the ladder body, the horizontal position of the connection point of each tension spring and the pit wall is higher than that of the connection point of each tension spring and the ladder body, the two clamping blocks are fixed on the pit wall above the base, two free ends of the two clamping blocks extend to opposite sides, the distance between the protruding tips of the two clamping blocks is smaller than the width, when the ladder stand is folded, the ladder body is erected and clamped between the two clamping block protrusions and the bottom pit wall, a gap is formed between the ladder body and the bottom pit ground, and the sum of the length of the ladder body from the hinged point of the connecting rod to the lower end of the ladder body and the length of the connecting rod is larger than the distance from the hinged point of the connecting rod and the base to the bottom pit ground.

2. The elevator pit ladder of claim 1, wherein: the ladder is characterized in that a fixed contact is arranged on the pit wall, a movable contact is arranged on the ladder body, the fixed contact on the pit wall is arranged on a moving path of the movable contact, when the ladder is folded, the movable contact of the ladder body is close to and in contact with the fixed contact on the pit wall, and the alarm system gives out a prompt.

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