CN115520747A

CN115520747A - Movable stopping device for elevator system

Info

Publication number: CN115520747A
Application number: CN202110709113.9A
Authority: CN
Inventors: 王兆安; 王文见; 徐霏
Original assignee: Tisheng Elevator Shanghai Co ltd
Current assignee: Tisheng Elevator Shanghai Co ltd
Priority date: 2021-06-25
Filing date: 2021-06-25
Publication date: 2022-12-27

Abstract

The invention relates to a movable stop device for an elevator system, comprising: a base rotatably provided; a first bumper connected to the base in a first direction by a bumper stay; a second bumper connected to the bumper stay in a second direction; the mounting block is positioned on one side of the base and is far away from the base; the lead screw penetrates through the base, one end of the lead screw is rotatably connected to the mounting block, and the other end of the lead screw is connected to the motor positioned on the other side of the base; the screw nut sliding block is sleeved on the screw and can move on a sliding rail parallel to the screw when the screw rotates; the inclined strut assembly is obliquely arranged, and two ends of the inclined strut assembly are respectively connected to the buffer strut and the lead screw nut slide block; and a power supply that supplies power to the motor. The invention can be applied to shallow pit or low-ceiling elevators to ensure sufficient working height and space when the elevator system is overhauled.

Description

Movable stopping device for elevator system

Technical Field

The invention relates to an elevator maintenance tool, in particular to a movable stopping device applied to an elevator with a shallow pit or a low top floor.

Background

In order to ensure the long-term safe and normal running of the elevator, the elevator needs to be overhauled and maintained frequently or regularly, and in the process of overhauling and maintaining, an overhauling worker inevitably needs to enter an elevator pit or the top of a car to operate. The requirements of pit depth and top floor height of an elevator shaft are clearly specified in GB7588 elevator manufacturing and installation safety standard so as to ensure the personal safety of maintainers.

However, some buildings are designed with insufficient pit depth or top floor height of the elevator shaft. For the buildings, especially for the reconstruction of some old buildings and the outdoor installation of elevators, the height space of the original building is limited, and the requirements of the pit depth or the top floor height of an elevator shaft specified in GB7588 elevator manufacturing and installation safety code are difficult to meet.

When the elevator is overhauled in the elevator which does not meet the standard, the safety of the maintainers cannot be guaranteed due to the insufficient depth of the pit and the insufficient height of the top layer.

Disclosure of Invention

The invention aims to provide a movable stop device applied to a shallow pit or low-top elevator, which ensures enough working height and space when an elevator system is overhauled.

To achieve the above object, the present invention provides a movable stop device for an elevator system, comprising: a base rotatably provided; a first bumper connected to the base in a first direction by a bumper stay, the first bumper forming a first height to the base when the bumper stay is in an upright position; a second bumper connected to the bumper stay in a second direction and forming a second height to the base when the bumper stay is in a horizontal position, wherein the first height is greater than the second height; the mounting block is positioned on one side of the base and is far away from the base; the lead screw penetrates through the base, one end of the lead screw is rotatably connected to the mounting block, and the other end of the lead screw is connected to the motor positioned on the other side of the base; the screw nut sliding block is sleeved on the screw and can move on a sliding rail parallel to the screw when the screw rotates; the inclined strut assembly is obliquely arranged, and two ends of the inclined strut assembly are respectively connected to the buffer strut and the lead screw nut sliding block, so that when the lead screw nut sliding block moves, the buffer strut is driven to rotate through the inclined strut assembly, the base is driven to rotate, and the overhaul state and the non-overhaul state are switched; and a power supply that supplies power to the motor to control rotation of the lead screw.

The movable stop device for the elevator system is characterized in that a rotating shaft hole is formed in the base, the base is provided with a round angle concentric with the rotating shaft hole, a fixed rotating shaft penetrates through the rotating shaft hole, and the base can rotate around the rotating shaft along the round angle.

The aforementioned movable stop device for an elevator system, wherein the buffer stay is configured to be adjustable or telescopic, the diagonal stay assembly can be used to support the buffer stay, and the second direction is perpendicular to the first direction.

The movable stopping device for the elevator system further comprises a bottom box, and the base and the sliding rail are arranged in the bottom box.

The movable stopping device for the elevator system further comprises a coupler, wherein the lead screw is connected to the motor through the coupler, so that the lead screw is driven to rotate when the motor operates, the lead screw nut sliding block sleeved on the lead screw moves on a sliding rail parallel to the lead screw, the buffer supporting rod is driven to rotate through the inclined supporting rod assembly, the base is driven to rotate, and therefore the overhaul state is switched to the non-overhaul state or the non-overhaul state is switched to the overhaul state.

The aforementioned movable stop for an elevator system, wherein the first height satisfies a safe service height and space when the movable stop for an elevator system is in a service state, i.e., when the bumper stay is in a vertical position; when the movable stop device for the elevator system is in a non-overhaul state, namely when the buffer support rod is in a horizontal position and the second buffer is in a vertical position, the second height does not influence the normal operation of the elevator.

The movable stopping device for the elevator system is characterized in that a first switch is further arranged on the base or the bottom box, and when the first buffer is rotated to the vertical position, the buffer support rod, the diagonal support rod component, the lead screw nut slider or the base is enabled to touch the first switch, so that the first switch is disconnected, the elevator safety loop is disconnected, and the elevator is in a maintenance state.

The movable stopping device for the elevator system is characterized in that a second switch is further arranged on the base or the bottom case, and when the second buffer is rotated to the vertical position, the buffer support rod, the diagonal support rod component, the lead screw nut slider or the base is enabled to touch the second switch, so that the second switch is turned on, the elevator safety loop is turned on, and the elevator is in a non-maintenance state.

The aforementioned movable stopping device for an elevator system, wherein a third switch is further disposed on the base, the bottom box or the lead screw nut slider, when the second buffer is rotated to the vertical position, the buffer strut, the diagonal strut assembly, the lead screw nut slider or the base is pressed against the third switch, so that the third switch is closed, and a closed signal is transmitted to a control system of the elevator to inform the control system that the movable stopping device is currently in a non-service state.

The movable stopping device for the elevator system is characterized in that a fourth switch is further arranged on the base, the bottom box or the lead screw nut slider, when the first buffer is rotated to the vertical position, the buffer support rod, the inclined support rod assembly, the lead screw nut slider or the base is enabled to touch and press the fourth switch, so that the fourth switch is closed, and a closed signal is transmitted to a control system of the elevator to inform the control system that the movable stopping device is in a maintenance state currently.

The invention has the beneficial effects that: when the movable stop device is arranged below the elevator car, the elevator car can be ensured not to collide with the ground when in operation, and enough off-ground maintenance space is provided during pit maintenance, so that the standard requirement of a shallow pit elevator is met; when the movable stopping device is arranged below the counterweight, the elevator car can reach the top floor in normal operation, and meanwhile, enough space of the top floor is provided when the top of the elevator car is overhauled, so that the requirements on the elevator shaft building are reduced, and the safety of maintainers is ensured.

Drawings

Fig. 1 is a perspective view of a movable stop device according to an exemplary embodiment of the present invention fully extended, i.e., in service.

Fig. 2 is a perspective view of the movable stop device of the exemplary embodiment of the present invention fully retracted, i.e., in a non-service state of normal operation of the elevator.

Description of reference numerals:

1: first buffer

2: buffer stay bar

3: diagonal bracing assembly

4: screw nut slide block

5: sliding rail

6: electrical machine

7: screw rod

8: second buffer

9: base seat

10: rotating shaft

11: first switch

12: second switch

13: bottom box

14: round corner

15: third switch

16: the fourth switch

17: coupling device

18: mounting block

19: support assembly

20: motor mounting seat

21: baffle plate

91: first contact member

92: a second contact-pressure member.

It is to be understood that the drawings are not to scale, but rather illustrate various features which are presented in a somewhat simplified form to illustrate the basic principles of the invention. In the drawings of the present invention, like reference numerals designate like or equivalent parts of the invention.

Detailed Description

Reference will now be made in detail to various embodiments of the invention, examples of which are illustrated in the accompanying drawings and described below. While the invention will be described in conjunction with the exemplary embodiments of the invention, it will be understood that the description is not intended to limit the invention to those exemplary embodiments. On the contrary, the invention is intended to cover not only the exemplary embodiments of the invention, but also various alternatives, modifications, equivalents and other embodiments, which are included within the spirit and scope of the invention as defined by the appended claims.

Hereinafter, various exemplary embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

FIG. 1 is a perspective view of the movable stop of the present invention shown in an exemplary orientation with the movable stop fully extended, i.e., in service; fig. 2 shows, by way of example, a perspective view of the movable stop arrangement of the invention fully retracted, i.e. in a non-service state in normal operation of the elevator.

Referring to fig. 1 and 2, the present invention relates to a movable stop for an elevator system, comprising: the device comprises a base 9, a first buffer 1, a second buffer 8, a mounting block 18, a lead screw 7, a lead screw nut slide block 4, a diagonal brace rod component 3 and a power supply (not shown in the figure), wherein the base 9 is rotatably arranged; the first buffer 1 is connected to the base 9 in a first direction by the buffer stay 2, the first buffer 1 forming a first height to the base 9 when the buffer stay 2 is in the vertical position; the second bumper 8 is connected to the bumper stay 2 in a second direction, and the second bumper 8 to the base 9 forms a second height when the bumper stay 2 is in a horizontal position, wherein the first height is greater than the second height; the mounting block 18 is located on one side of the base 9 and away from the base; the lead screw 7 penetrates through the base, one end of the lead screw 7 is rotatably connected to the mounting block 18, and the other end of the lead screw 7 is connected to the motor 6 positioned on the other side of the base 9; the lead screw nut sliding block 4 is sleeved on the lead screw 7 and can move on the sliding rail 5 parallel to the lead screw 7 when the lead screw 7 rotates; the inclined strut assembly 3 is obliquely arranged, and two ends of the inclined strut assembly 3 are respectively connected to the buffer strut 2 and the lead screw nut sliding block 4, so that when the lead screw nut sliding block 4 moves, the buffer strut 2 is driven to rotate through the inclined strut assembly 3, the base 9 is driven to rotate, and the overhaul state and the non-overhaul state are switched; the power supply supplies power to the motor 6 to control the rotation of the lead screw 7.

In the present invention, the first direction is preferably perpendicular to the second direction, but not limited thereto, and may be deformed such that the first direction and the second direction form a predetermined angle with each other. When the elevator is normally operated, that is, when the elevator is in a non-service state (refer to fig. 2), a direction (vertical direction) parallel to the traveling direction of the elevator is defined as a second direction, and a direction (horizontal direction) perpendicular to the traveling direction of the elevator is defined as a first direction, and the first direction is parallel to the length direction of the lead screw.

In the present invention, the position of the second buffer 8 is not limited to the above description, the second buffer 8 may be connected to the buffer stay 2 in the second direction, the second buffer 8 may also be directly connected to the base 9 in the second direction, and likewise the second buffer 8 may also be connected to the base 9 via the mounting base in the second direction, preferably, under the connection structure shown in fig. 2, the movable stop device for an elevator system of the present invention may further include a support member 19, and when the elevator is in a non-service state, the support member 19 may be disposed between the buffer stay 2 and the mounting plane of the movable stop device for an elevator system of the present invention to improve the buffering strength.

Further, the length of the damper strut 2 should be selected such that: when the movable stop arrangement for an elevator system is in service, i.e. when the buffer strut 2 is in a vertical position (see fig. 1), the first height meets a safe service height and space; when the movable stop arrangement for the elevator system is in a non-service state, i.e. when the buffer stay 2 is in a horizontal position and the second buffer 8 is in a vertical position (cf. Fig. 2), the second height does not affect the normal operation of the elevator.

In the exemplary embodiment of the present invention, the length of the buffer stay 2 is fixed, but it is understood that in other embodiments, in order to flexibly adapt to the depths of pit bottoms of different elevator systems, the buffer stay 2 may be arranged to be adjustable or telescopic, for example, the buffer stay 2 is arranged in a plurality of pieces or segments, and the buffer stays 2 with different lengths are obtained by connecting and fixing the buffer stays 2 with a plurality of pieces or segments as required through openings formed therein, so as to meet the size requirements of different conditions.

Furthermore, a rotating shaft hole (not numbered) is formed in the base 9, the base 9 is provided with a fillet 14 concentric with the rotating shaft hole, a fixed rotating shaft 10 penetrates through the rotating shaft hole, the base 9 can rotate around the rotating shaft 10 along the fillet 14, and the fillet 14 enables the base 9 to rotate smoothly in the rotating process, so that the stability of the whole device is improved.

In addition, the buffer device further comprises a coupler 17, the lead screw 7 is connected to the motor 6 through the coupler 17, so that the lead screw 7 is driven to rotate when the motor 6 operates, the lead screw nut slider 4 sleeved on the lead screw 7 moves on the slide rail 5 parallel to the lead screw 7, the buffer strut 2 is driven to rotate through the inclined strut assembly 3, and the base 9 is driven to rotate, so that the maintenance state is switched to the non-maintenance state, or the non-maintenance state is switched to the maintenance state.

In an exemplary embodiment of the present invention, the number of the diagonal strut assemblies 3 is two, but not limited thereto, the diagonal strut assemblies 3 may be used to support the buffer strut 2, one end of the diagonal strut assembly 3 is connected to the buffer strut 2, the other end of the diagonal strut assembly 3 is connected to the lead screw nut slider 4, the lead screw nut slider 4 and the lead screw 7 are combined into a lead screw nut mechanism, and the lead screw nut slider 4 can slide on the slide rail 5.

The movable stopping device for the elevator system of the invention further comprises a bottom box 13, and the base 9, the motor 6 and the sliding rail 5 are arranged in the bottom box 13. The bottom case 13 is made of a corrosion-resistant material, has no holes or gaps at the bottom and around, and has a certain height around. When the bottom box 13 is arranged in the pit of the elevator system, the waterproof function can be realized for the components arranged in the bottom box.

Specifically, the motor 6 drives the screw 7 to rotate when operating, so that the screw nut slider 4 sleeved on the screw 7 moves on the slide rail 5 parallel to the screw 7, the inclined strut assembly 3 drives the buffer strut 2 to rotate, and the base 9 rotates around the rotating shaft 10, so that the movable stopping device has two states: when the first buffer 1 is right above, i.e. the buffer stay 2 is in the vertical position, the movable stop device of the present invention is in a service state, as shown in fig. 1; when the second buffer 8 is directly above, i.e. the buffer stay 2 is in the horizontal position, the movable stop arrangement of the invention is in a non-overhauled state, i.e. the elevator is in a normal operating state, as shown in fig. 2.

Further, a first switch 11 is further disposed at a proper position on the base 9 or the bottom case 13, when the first buffer 1 is rotated to the vertical position, the buffer stay 2, the diagonal stay assembly 3, the lead screw nut slider 4 or the base 9 is made to touch the first switch 11, so that the first switch 11 is turned off, the elevator safety circuit is opened, and the elevator is in a maintenance state.

The movable stop device for the elevator system of the invention can be further provided with a motor mounting seat 20, the motor mounting seat 20 is fixedly arranged on the bottom box 13, and the motor mounting seat 20 can be fixedly arranged on the bottom box 13 through a fixing device or can be integrally formed with the bottom box 13. In the exemplary embodiment of the invention shown, the first switch 11 is located on the motor mount 20, and when the first buffer 1 is rotated to the vertical position (refer to fig. 1), the first touch member 91 on the base 9 touches the first switch 11, so that the first switch 11 is opened, the elevator safety circuit is disconnected, and the elevator is in a maintenance state.

Further, a second switch 12 is further disposed at a suitable position on the base 9 or the bottom case 13, when the second buffer 8 is rotated to the vertical position, the buffer stay 2, the diagonal stay assembly 3, the lead screw nut slider 4 or the base 9 is made to touch the second switch 12, so that the second switch 12 is turned on, the elevator safety circuit is turned on, and the elevator is in a non-maintenance state.

In the exemplary embodiment of the invention shown, the second switch 12 is located on the bottom box 13, and when the second buffer 8 is rotated to the vertical position (refer to fig. 2), the second contact member 92 on the base 9 contacts the second switch 12, so that the second switch 12 is turned on, the elevator safety circuit is turned on, and the elevator is in a non-service state.

Further, a third switch 15 is provided at a suitable position on the base 9, the bottom case 13 or the lead screw nut slider 4, when the second buffer 8 is rotated to the vertical position, the buffer stay 2, the diagonal stay assembly 3, the lead screw nut slider 4 or the base 9 is pressed to press the third switch 15, so that the third switch 15 is closed, and a closed signal is transmitted to the control system of the elevator to inform the control system that the movable stop device is in the non-maintenance state at present.

In the exemplary embodiment of the invention shown, the third switch 15 is located on the first side of the screw nut slide 4 near the mounting block 18, and when the second buffer 8 is turned to the vertical position, the mounting block 18 is pressed against the third switch 15 by sliding of the screw nut slide 4, so that said third switch 15 is closed, and a closing signal is transmitted to the control system of the elevator informing the control system that the movable stop means is currently in a non-service state.

Further, a fourth switch 16 is also provided at a suitable position on the base 9, the bottom case 13 or the lead screw nut slider 4, when the first buffer 1 is rotated to the vertical position, the buffer strut 2, the diagonal strut assembly 3, the lead screw nut slider 4 or the base 9 is pressed against the fourth switch 16, so that the fourth switch 16 is closed, and a closed signal is transmitted to the control system of the elevator to inform the control system that the movable stop motion device is in the maintenance state currently.

In the exemplary embodiment of the invention shown, the fourth switch 16 is located on a second side of the lead screw nut slider 4 remote from the mounting block 18, said first side and said second side being opposite to each other, when the first buffer 1 is rotated to the vertical position, the slide of the lead screw nut slider 4 causes the shutter 21 to touch and press the fourth switch 16, said shutter 21 is fixedly connected to the bottom case 13, but without this being limiting, the shutter 21 and the bottom case 13 may also be integrally formed, so that said fourth switch 16 is closed, the closed signal is transmitted to the control system of the elevator to inform the control system that said movable stopping device is currently in the service state.

When the movable stop device is arranged below the elevator car, the elevator car can be prevented from colliding with the ground during operation, and sufficient ground clearance space is provided during pit maintenance, so that the standard requirement of a shallow pit elevator is met; when the movable stopping device is arranged below the counterweight, the elevator car can reach the top floor in normal operation, and meanwhile, enough space of the top floor is provided when the top of the elevator car is overhauled, so that the requirements on the elevator shaft building are reduced, and the safety of maintainers is ensured.

The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. They are not intended to be exhaustive or to limit the invention to the precise forms disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications thereof. It is intended that the scope of the invention be defined by the following claims and their equivalents.

Claims

1. A movable stop for an elevator system, comprising:

a base rotatably provided;

a first bumper connected to the base in a first direction by a bumper stay, the first bumper forming a first height to the base when the bumper stay is in an upright position;

a second bumper connected to the bumper stay in a second direction and forming a second height to the base when the bumper stay is in a horizontal position, wherein the first height is greater than the second height;

the mounting block is positioned on one side of the base and is far away from the base;

the lead screw penetrates through the base, one end of the lead screw is rotatably connected to the mounting block, and the other end of the lead screw is connected to the motor positioned on the other side of the base;

the screw nut sliding block is sleeved on the screw and can move on a sliding rail parallel to the screw when the screw rotates;

the inclined strut assembly is obliquely arranged, and two ends of the inclined strut assembly are respectively connected to the buffer strut and the lead screw nut sliding block, so that the buffer strut is driven to rotate through the inclined strut assembly when the lead screw nut sliding block moves, the base is driven to rotate, and the maintenance state and the non-maintenance state are switched; and

and a power supply which supplies power to the motor to control rotation of the lead screw.

2. The movable stop device for an elevator system according to claim 1, wherein a rotation shaft hole is formed in the base, and the base has a round corner concentric with the rotation shaft hole, and a fixed rotation shaft is inserted into the rotation shaft hole, and the base can rotate around the rotation shaft along the round corner.

3. The movable stop for an elevator system of claim 2, wherein the bumper stay is configured to be adjustable or retractable, the diagonal stay assembly can be used to support the bumper stay, and the second direction is perpendicular to the first direction.

4. The movable stop for an elevator system of claim 3, further comprising a bottom box, the base and the slide rail being disposed within the bottom box.

5. The movable stopping device for the elevator system according to claim 4, further comprising a coupler, wherein the lead screw is connected to the motor through the coupler, so that when the motor operates, the lead screw is driven to rotate, the lead screw nut slider sleeved on the lead screw moves on a sliding rail parallel to the lead screw, the buffer stay bar is driven to rotate through the inclined stay bar assembly, and the base is driven to rotate, so that the maintenance state is switched to the non-maintenance state, or the non-maintenance state is switched to the maintenance state.

6. The movable stop for an elevator system of claim 5, wherein the first height satisfies a safe service height and space when the movable stop for an elevator system is in a service condition, i.e., when the bumper stay is in a vertical position;

when the movable stop device for the elevator system is in a non-service state, namely when the buffer support rod is in a horizontal position and the second buffer is in a vertical position, the second height does not influence the normal operation of the elevator.

7. The movable stop device for an elevator system according to any one of claims 1 to 6, wherein a first switch is further provided on the base or bottom case, when the first buffer is rotated to a vertical position, the buffer stay, the sprag rod assembly, the lead screw nut slider or the base is made to touch the first switch, so that the first switch is opened, an elevator safety circuit is opened, and an elevator is in a maintenance state.

8. The movable stop device for an elevator system according to any one of claims 1 to 6, wherein a second switch is further provided on the base or bottom case, when the second buffer is rotated to a vertical position, the buffer stay, the sprag rod assembly, the lead screw nut slider or the base is made to touch the second switch, so that the second switch is turned on, an elevator safety circuit is turned on, and an elevator is in a non-service state.

9. The movable stopping device for an elevator system according to any of claims 1-6, characterized in that a third switch is further provided on the base, bottom box or lead screw nut slider, when the second buffer is turned to vertical position, the buffer stay, the sprag rod assembly, the lead screw nut slider or the base is made to touch the third switch, thereby making the third switch closed, the closed signal is transmitted to the control system of the elevator informing the control system that the movable stopping device is currently in non-service condition.

10. The movable stopping device for an elevator system according to any of claims 1-6, characterized in that a fourth switch is further provided on the base, bottom case or lead screw nut slider, when the first buffer is rotated to a vertical position, such that the buffer stay, the sprag rod assembly, the lead screw nut slider or the base touches the fourth switch, such that the fourth switch is closed, a closed signal is transmitted to the control system of the elevator informing the control system that the movable stopping device is currently in a service state.