CN219408739U

CN219408739U - Pit overhauls safety device that prevents

Info

Publication number: CN219408739U
Application number: CN202221364308.0U
Authority: CN
Inventors: 冯小明; 陈令前; 高明星; 夏志杰; 雷巍
Original assignee: Joylive Elevator Co ltd
Current assignee: Joylive Elevator Co ltd
Priority date: 2022-06-01
Filing date: 2022-06-01
Publication date: 2023-07-25
Anticipated expiration: 2032-06-01

Abstract

The utility model discloses a pit overhaul safety stopping device which aims to solve the technical problem of potential safety hazards caused by reduction of height and depth of a household pit. When the elevator is in the maintenance state, the ejector rod is erected to keep the vertical state, the electronic contact switch is triggered, the control system is automatically switched to the maintenance mode, the elevator floor switch cannot be controlled, the elevator is effectively prevented from continuing to descend due to accidents, even if the elevator descends due to accidents, the erected ejector rod can give the supporting force to the elevator car body, the elevator car body is prevented from descending, and therefore the elevator car body is prevented from endangering the safety of maintenance personnel in the pit from the electrical and mechanical dual angles.

Description

Pit overhauls safety device that prevents

Technical Field

The utility model belongs to the technical field of elevators, and relates to a pit maintenance safety blocking device.

Background

In recent years, the market scale of home elevators is larger and larger, the field pit depth of the home elevators is gradually reduced, and even home elevators without pit structures are introduced in the industry. The reduced pit depth means that the safety space for elevator pit maintenance is compressed, and a great potential safety hazard exists for elevator maintenance personnel.

Disclosure of Invention

The utility model provides a pit overhaul safety stopping device for solving the technical problem that potential safety hazards exist in the operation of overhaul personnel in a pit.

In order to solve the technical problems, the utility model adopts the following technical scheme:

the pit overhaul safety prevention device comprises a base, a push rod and an electronic contact switch, wherein the base is fixed on the pit surface of an elevator shaft through an expansion bolt, the push rod is rotatably arranged in the base, the electronic contact switch is in signal connection with an elevator control system, when the push rod is rotated upwards to a vertical state, the side wall touches the electronic contact switch, and the elevator control system is automatically switched to an overhaul mode;

the base is provided with a mounting hole, a shaft rod arranged at the bottom of the ejector rod is arranged in the mounting hole in a penetrating manner, and the shaft rod can move up and down in the mounting hole; the bottom of ejector pin is provided with the grooving, be provided with the portion of inserting in the base, the base in the both ends of portion of inserting are provided with first backstop portion and second backstop portion, the portion of inserting joint in the grooving, when the portion of inserting is located in the grooving upper portion, first backstop portion and second backstop are respectively opposite to two lateral walls of ejector pin, when the portion of inserting is located in the grooving lower part, first backstop portion is less than the height of grooving, will the ejector pin to the direction of first backstop portion is folded 90, first backstop portion passes the grooving, the portion of inserting with the grooving separation.

Compared with the prior art, the utility model has the following beneficial effects:

1. when the elevator is in an overhaul state, the ejector rod is erected to keep a vertical state, the electronic contact switch is triggered, the control system is automatically switched to an overhaul mode, the elevator floor switch cannot be controlled, the elevator is effectively prevented from continuing to descend accidentally, and the elevator car body is prevented from endangering the safety of overhaul personnel in the pit from an electrical angle;

2. even if the elevator descends accidentally, the erected ejector rod can give the supporting force to the elevator car body, so that the elevator car body is prevented from descending, and the elevator car body is prevented from damaging the safety of maintenance personnel in the pit from a mechanical angle;

3. the first stop part and the second stop part on the base form an anti-toppling structure of the ejector rod in a vertical state, so that accidental toppling of the ejector rod in the using process can be avoided, and the safety of the device is further improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are required to be used in the description of the embodiments will be briefly described below.

FIG. 1 is a schematic view of the construction of an elevator pit;

FIG. 2 is a schematic view of the blocking device in an open state;

FIG. 3 is a schematic view of the blocking device in a closed state;

FIG. 4 is a schematic view of the structure of the ejector pin;

FIG. 5 is a schematic view of the structure of the blocking device;

fig. 6 is a schematic structural view of the base.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects solved by the utility model more clear, the utility model is further described in detail below with reference to the embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

Examples

The pit overhaul safety prevention device shown in fig. 2 comprises a base 10, a push rod 20 and an electronic contact switch 30, wherein the base 10 is fixed on an elevator shaft pit surface 50 through an expansion bolt 40, a mounting hole 11 is formed in the base 10, a shaft lever 24 mounted at the bottom of the push rod 20 is arranged in the mounting hole 11 in a penetrating manner, the shaft lever 24 can move up and down in the mounting hole 11, the push rod 20 is rotatably mounted in the base 10, the electronic contact switch 30 is in signal connection with an elevator control system, when the push rod 20 rotates upwards to be in a vertical state, the side wall touches the electronic contact switch 30, the elevator control system is automatically switched to an overhaul mode, an elevator floor switch cannot be controlled, the elevator is effectively prevented from continuing to descend accidentally, and the safety of an elevator car body in the pit is prevented from being endangered by an electrical angle. If the elevator mode is accidentally switched before the maintenance is completed, the erected ejector rod 20 can give the car body supporting force (see fig. 2), so that the car body is prevented from descending, and the elevator car body is prevented from endangering the safety of maintenance staff in the pit from a mechanical angle.

Referring to fig. 3-6, the specific structure of the safety blocking device is:

the bottom of the ejector rod 20 is provided with a cutting groove 21, the base 10 is provided with an inserting part, and two ends of the inserting part are provided with a first stop part 12 and a second stop part 13. When the ejector rod 20 is in a vertical state, the inserting part is positioned in the cutting groove 21, the ejector rod 20 is pressed downwards, the shaft lever 24 of the ejector rod 20 slides downwards in the mounting hole 11, the inserting part is higher than the top of the cutting groove 21, when the inserting part is positioned in the upper part of the cutting groove 21, the first stop part and the second stop part respectively face two side walls of the ejector rod 20, the first stop part and the second stop part form an anti-toppling structure of the ejector rod 20 in the vertical state, accidental toppling of the ejector rod in the using process can be avoided, and the safety of the device is further improved. When the ejector rod needs to be folded, the ejector rod is lifted upwards, the inserting portion is lower than the top of the cutting groove 21, when the inserting portion is located in the lower portion of the cutting groove 21, the first stopping portion is lower than the height of the cutting groove 21, the ejector rod 20 is folded by 90 degrees towards the direction of the first stopping portion, the first stopping portion penetrates through the cutting groove 21, and the inserting portion is separated from the cutting groove 21.

As a modification of the present embodiment, the mounting hole 11 includes a first vertical hole 111 and a second hole 112 inclined toward the first stopper, the second hole being located above the first hole, the bottom of the second hole being connected to the top of the first hole. When the ejector rod 20 is in the vertical state, the shaft lever 24 is located in the first bar hole, and even if the ejector rod 20 moves upwards, the shaft lever 24 is blocked by the inclined side wall of the second bar hole, and at the height, the first stop part is still higher than the cutting groove, so that the anti-toppling structure is still effective.

As an improvement of the present embodiment, the base 10 is formed by bending a sheet metal part; the bottom of the metal sheet metal part is bent to one side by 90 degrees to form a bottom plate 17, a through hole 13 is formed in the bottom plate, and an expansion bolt 40 passes through the through hole; the board perpendicular to the bottom plate in the metal sheet metal component is the mainboard, and the top of mainboard is provided with recess 14, and the bottom of recess is the plug-in part, and the lug of one side that the mainboard is located the recess is first backstop portion 12, and the opposite side lug is 90 to one side bending type and is formed second backstop portion 13. The base 10 adopts a sheet metal bending structure, the bottom plate 17, the main plate and the second stop part 13 form a C shape, so that the descending impact force of the car body can be buffered, the manufacturing cost is low, the structural volume is exquisite, and the occupied area of the pit is reduced.

Preferably, a strip-shaped mounting hole I16 is formed in the main board, a connecting part of the electronic contact switch 30 is mounted in the mounting hole I, and the mounting position of the electronic contact switch is adjustable.

Preferably, the ejector rod 20 is a square pipe, and a damping rubber pad 26 is arranged at the top of the ejector rod, so that rigid impact between the car body and the ejector rod is avoided, and the effects of buffering and noise reduction are achieved.

To sum up, install this device in the pit, just to elevator car buffer board 60 positions under the ejector pin vertical state, when elevator operation, the stop device is in the pit face level state of falling down, when the elevator is in the maintenance state, and maintainer is when getting into pit maintenance operation, opens this device earlier, makes the elevator switch to the maintenance mode, guarantees that the maintainer of below does not receive the extruded safety injury of car body to build an effectual safe living space.

Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The pit overhaul safety prevention device is characterized by comprising a base, a push rod and an electronic contact switch, wherein the base is fixed on the pit surface of an elevator shaft through an expansion bolt, the push rod is rotatably arranged in the base, the electronic contact switch is in signal connection with an elevator control system, when the push rod is rotated upwards to a vertical state, the side wall touches the electronic contact switch, and the elevator control system is automatically switched to an overhaul mode;

2. The pit inspection safety prevention device according to claim 1, wherein the mounting hole comprises a first vertical bar hole and a second bar hole inclined toward the first stopper, the second bar hole is located above the first bar hole, and a bottom of the second bar hole is connected with a top of the first bar hole.

3. The pit inspection safety prevention device of claim 1, wherein the base is formed from a sheet metal part by bending; the bottom of the metal sheet metal part is bent to one side by 90 degrees to form a bottom plate, a through hole is formed in the bottom plate, and the expansion bolt passes through the through hole; the metal sheet part is characterized in that a plate perpendicular to the bottom plate is a main plate, a groove is formed in the top of the main plate, the bottom of the groove is the insertion part, one side lug of the main plate, which is positioned in the groove, is the first stop part, and the other side lug is bent to one side by 90 degrees to form the second stop part.

4. A pit inspection safety prevention device according to claim 3, wherein a strip-shaped mounting hole is provided in the main board, and the connection portion of the electronic contact switch is mounted in the mounting hole.

5. The pit inspection safety prevention device of claim 1, wherein the ejector rod is a square pipe.

6. The pit inspection safety prevention device according to claim 5, wherein a shock absorbing rubber pad is installed on top of the jack.