CN111285223A - Control device and control method for depth of shallow pit of elevator - Google Patents
Control device and control method for depth of shallow pit of elevator Download PDFInfo
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- CN111285223A CN111285223A CN202010126727.XA CN202010126727A CN111285223A CN 111285223 A CN111285223 A CN 111285223A CN 202010126727 A CN202010126727 A CN 202010126727A CN 111285223 A CN111285223 A CN 111285223A
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- elevator
- pit
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- depth
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/28—Buffer-stops for cars, cages, or skips
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/0043—Devices enhancing safety during maintenance
- B66B5/005—Safety of maintenance personnel
Abstract
The invention discloses a control device and a control method for the depth of a shallow pit of an elevator, which comprises any door capable of entering the pit, an electrical safety system, a detection switch, a limit switch, an electrical reset device, a heightening seat, a car buffer, a first in-place switch and a second in-place switch; when an elevator maintainer opens any door which can enter a pit outside a hall by using a key, a detection switch arranged on the corresponding door is enabled to act, so that an electric safety system is triggered to act, and the normal operation of the elevator is stopped, and only when the maintainer enters the pit and installs a heightening seat between a car buffer and the ground of the pit and the car buffer is raised, the elevator can be overhauled and operated, so that the safety of the pit maintainer can be ensured even if the depth of the pit is smaller; the control device and the control method for the depth of the shallow pit ensure that the pit has enough danger avoiding space, ensure the safety of overhaul personnel of the elevator in the pit, and have simple operation, safety and reliability.
Description
Technical Field
The invention relates to the technical field of elevators, in particular to a device and a method for controlling the depth of a shallow pit of an elevator.
Background
With the continuous development of society, high-rise buildings are more and more, and elevators are used as the most main vertical transportation tools, are more and more widely applied to buildings and gradually become an indispensable part of people's lives.
For the traditional elevator, according to the corresponding national standard, the design of the pit depth can meet the enough danger avoiding space of pit maintainers; and for the existing buildings in old urban areas, elevators are additionally arranged, and underground pipe networks in the areas are often complex, so that the pits cannot be dug deeply, that is, enough pit danger avoiding space cannot be guaranteed, and the safety of pit maintainers is damaged.
Disclosure of Invention
The invention aims to provide a control device and a control method for the depth of a shallow pit of an elevator, which ensure the safety of elevator pit maintainers, are simple to operate, and are safe and reliable.
The invention is realized by the following technical scheme:
a control device for the depth of a shallow pit of an elevator comprises any door capable of entering the pit, an electrical safety system, a detection switch, a limit switch, an electrical reset device, a booster seat and a car buffer; any door capable of entering the pit is provided with a trigger door lock; the detection switch is arranged close to one end of the trigger door lock, and the trigger door lock is connected with the detection switch through touch; the detection switch is electrically connected with the electrical safety system; the electrical resetting device is arranged on the outer wall of the well; the car buffer is arranged in the middle of the pit; the electrical reset device is electrically connected with the electrical safety system; the heightening seat is arranged at the edge of a shaft or between the car buffer and the ground of a pit, when the heightening seat is arranged at the edge of the shaft wall, the ascending or descending operation of the elevator car is not influenced, and when the heightening seat is arranged between the car buffer and the ground of the pit, the car buffer is lifted; the limit switch is installed on the lower extreme lateral wall of well wall, limit switch with elevator car's contact point is higher than car buffer top, when the elevator overhaul descend to with by after the increase seat is raised before the car buffer contact, elevator car triggers limit switch, limit switch action for the elevator stops to descend.
Furthermore, the control device for the depth of the shallow pit of the elevator also comprises a first in-place switch and a second in-place switch, wherein the first in-place switch is arranged on one side of the pit, which is far away from the edge of the shaft way; the first in-place switch is used for detecting whether the heightening seat is positioned at the edge of a shaft, and the second in-place switch is arranged on one side of the car buffer; the second switch that targets in place is used for detecting whether increase the seat and install between car buffer and pit ground.
Further, the triggering door lock comprises a door lock body and a door lock bolt; the door lock bolt is arranged inside the door lock body; one end of the lock tongue of the door lock touches the detection switch through action, and the detection switch triggers the electric safety system to act to stop the normal operation of the elevator.
Further, the electric resetting device is arranged on the outer wall of the shaft, which is easily contacted by an elevator maintainer.
Further, the control method of the depth of the elevator shallow pit comprises the following steps:
step (1), when an elevator maintainer opens any door capable of entering a pit outside a hall and tries to enter the pit for maintenance, the door capable of entering the pit touches the detection switch by triggering a door lock, the detection switch acts, the electrical safety system is further triggered to act, and the normal operation of the elevator is stopped;
step (2), an elevator maintainer enters the pit through any door which can enter the pit, at the moment, the heightening seat is positioned at the edge of the shaft, the first arrival switch acts, and the elevator car can only carry out emergency electric operation in the upward direction, so that the safety of the elevator maintainer in the pit is not endangered;
step (3), after entering a pit, an elevator maintainer manually installs the heightening seat between the car buffer and the ground of the pit to improve the installation height of the car buffer, and meanwhile, the second in-place switch acts to enable the elevator to carry out maintenance operation in an upward or downward direction, and at the moment, the car buffer is lifted up, so that even if the depth of the pit is smaller, the pit can be ensured to have enough danger avoiding space, and the safety of the elevator maintainer of the pit can not be endangered;
step (4), when the elevator is overhauled and goes down to the position where the elevator car is contacted with the car buffer lifted by the lifting seat, the elevator car triggers the limit switch, and the limit switch acts to enable the elevator not to go down and stop descending;
and (5) after the elevator maintenance personnel finish maintenance in the pit, manually detaching the heightening seat from the car buffer by the elevator maintenance personnel, resetting the heightening seat to the edge of a shaft, resetting the car buffer to the original installation position, simultaneously performing a first in-place switch action, enabling the elevator maintenance personnel to leave the pit through any door capable of entering the pit, closing any door capable of entering the pit outside a hall, manually resetting the detection switch, and finally operating the electrical resetting device to reset the electrical safety system to enable the elevator to recover to a normal operation state.
Further, in the step (3), the elevator car can perform the service operation in the upward or downward direction only when the electric safety system is actuated and the second position switch is actuated.
Further, in the step (4), the limit switch is only effective in the maintenance state of the elevator, and the limit switch is shielded and failed in the normal running state of the elevator.
Further, in the step (5), the resetting of the electrical safety system and the restoration of the elevator to the normal operation state can be realized only by: operating the electrical reset device to reset the electrical safety system in a state where the first in-position switch is actuated and any door that can enter the pit is closed and the detection switch is reset.
Further, in the step (5), the electrical safety system is not reset due to a power failure of the elevator.
Further, in the step (5), the elevator can be normally operated only when the electric safety system is not operated and the first arrival switch is operated.
The invention has the beneficial effects that:
according to the elevator, the control device of the depth of the shallow pit is arranged in the elevator, and the control method of the depth of the shallow pit of the elevator is adopted, so that when an operator opens any door capable of entering the pit outside a hall and tries to enter the pit for maintenance, the detection switch acts, the electrical safety system is triggered to act, and the normal operation of the elevator is stopped; at the moment, the heightening seat is positioned at the edge of a well, the first in-place switch acts, the elevator car can only perform emergency electric operation in the upward direction, an operator enters the pit and then manually installs the heightening seat between the car buffer and the ground of the pit to improve the installation height of the car buffer, and meanwhile, the second in-place switch acts, the elevator can perform maintenance operation in the upward or downward direction; when the elevator overhauls and descends to the car buffer after being lifted by the heightening seat before contacting, the limit switch acts, so that the elevator cannot descend. When the elevator maintenance personnel finish the inspection at the pit, the elevator maintenance personnel will manually increase the seat with the car buffer is detached, and will increase the seat and reset to the well edge, will the car buffer resets to original mounted position, and the first switch action that targets in place simultaneously, elevator maintenance personnel pass through can get into any door in pit and leave the pit, can get into any door in pit and close outside the hall, and manual messenger detection switch resets, operates at last electrical safety system resets and makes the elevator resume to normal operating condition. The control device and the control method for the depth of the shallow pit ensure that the pit has enough danger avoiding space, and ensure the safety of maintainers of an elevator in the pit.
Drawings
FIG. 1 is a schematic view of an embodiment of the present invention with a detection switch on any door that can enter the pit;
fig. 2 is a schematic view illustrating an electrical reset device disposed on an outer wall of a hoistway according to an embodiment of the present invention;
FIG. 3 is a top view of a hoistway with an elevated seat mounted at an edge of the hoistway in accordance with an embodiment of the present invention;
FIG. 4 is a side view of a hoistway with an elevated seat mounted at an edge of the hoistway in accordance with an embodiment of the present invention;
fig. 5 is a side view of a hoistway with a booster seat according to an embodiment of the present invention installed between a car bumper and a pit floor.
In the drawings: 1-any door that can access the pit; 2-triggering the door lock; 3-a detection switch; 4-the outer wall of the well; 5-an electrical reset device; 6-well wall; 7-an elevator car; 8-a heightening seat; 9-car buffer; 10-first in-position switch; 11-second go to switch; 12-limit switches; 21-a door lock body; 22-door lock bolt.
Detailed Description
The invention will be described in detail with reference to the drawings and specific embodiments, which are illustrative of the invention and are not to be construed as limiting the invention.
It should be noted that all the directional indications (such as up, down, left, right, front, back, upper end, lower end, top, bottom … …) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indication is changed accordingly.
In the present invention, unless expressly stated or limited otherwise, the term "coupled" is to be interpreted broadly, e.g., "coupled" may be fixedly coupled, detachably coupled, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature; in addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
As shown in fig. 1 and 5, a control device for the shallow pit depth of an elevator comprises any door 1 which can enter the pit, an electric safety system, a detection switch 3, a limit switch 12, an electric resetting device 5, a booster seat 8 and a car buffer 9; any door 1 capable of entering the pit is provided with a trigger door lock 2; the detection switch 3 is arranged close to one end of the trigger door lock 2, and the trigger door lock 2 is connected with the detection switch 3 through touch; the detection switch 3 is electrically connected with the electrical safety system; the electrical resetting device 5 is arranged on the outer wall 4 of the well; the car buffer 9 is arranged in the middle of the pit; the electrical reset device 5 is electrically connected with the electrical safety system; the heightening seat 8 is arranged at the edge of the hoistway wall 6 or between the car buffer 9 and the ground of the pit, when the heightening seat 8 is arranged at the edge of the hoistway wall 6, the ascending or descending operation of the elevator car 7 is not influenced, and when the heightening seat 8 is arranged between the car buffer 9 and the ground of the pit, the car buffer 9 is lifted; the limit switch 12 is installed on the lower end side wall of the hoistway wall 6, the contact point of the limit switch 12 and the elevator car 7 is higher than the top end of the car buffer 9, when the elevator is overhauled and descends to be in contact with the car buffer 9 after being lifted by the lifting seat 8, the elevator car 7 triggers the limit switch 12, and the limit switch 12 acts, so that the elevator stops descending.
It should be noted that the car buffer 9 is raised by the heightening seat 8, so that the buffer height of the elevator car 7 is increased, the elevator car 7 has sufficient buffer time and buffer height, and after the elevator car 7 completes buffering, enough safety height can be reserved, and even if the pit depth is small, the pit can be ensured to have enough danger-avoiding space, so that the safety of pit elevator maintainers cannot be endangered; the control device for the depth of the shallow pit of the elevator is simple to operate, safe and reliable, and guarantees the safety of maintainers of the elevator in the pit.
Specifically, in the scheme of this embodiment, the control device for the depth of the shallow pit of the elevator further includes a first in-place switch 10 and a second in-place switch 11, where the first in-place switch 10 is installed on one side of the pit, which is far away from the edge of the hoistway; the first position switch 10 is used to detect whether the elevating seat 8 is located at the edge of the hoistway, and the second position switch 11 is installed at one side of the car buffer 9; the second on-position switch 11 is used for detecting whether the heightening seat 8 is installed between the car buffer 9 and the pit floor.
Specifically, in the present embodiment, the triggering door lock 2 includes a door lock body 21 and a door lock bolt 22; the door lock bolt 22 is arranged inside the door lock body 21; one end of the door lock bolt 22 touches the detection switch 3 through action, and the detection switch 3 triggers the electric safety system to act to stop the normal operation of the elevator. It should be noted that the triggering door lock 2 can also be an electronic remote control lock or a fingerprint electronic lock or a finger vein electronic lock; the function of triggering the detection switch 3 to operate the electrical safety system to stop the normal operation of the elevator can be realized.
Specifically, in this embodiment, the electrical resetting device 5 is disposed on the hoistway outer wall 4 that is easily touched by an elevator maintenance worker. It should be noted that, according to the actual use condition and the maintenance environment, the electrical reset device 5 can be provided with a plurality of devices, and all the devices are arranged at the positions convenient for the operation and control of the elevator maintenance personnel, so that the work efficiency of the elevator maintenance personnel is improved.
Specifically, in the embodiment, a method for controlling the depth of a shallow pit of an elevator includes the following steps:
step (1), when an elevator maintainer opens any door 1 which can enter a pit outside a hall and tries to enter the pit for maintenance, any door 1 which can enter the pit touches the detection switch 3 by triggering a door lock 2, the detection switch 3 acts, and then the electrical safety system acts to stop normal operation of the elevator;
step (2), an elevator maintainer enters the pit through any door 1 which can enter the pit, at the moment, the heightening seat 8 is positioned at the edge of the shaft, the first in-place switch 10 acts, and the elevator car 7 can only carry out emergency electric operation in the upward direction, so that the safety of the elevator maintainer in the pit is not endangered;
step (3), after entering a pit, an elevator maintainer manually installs the heightening seat 8 between the car buffer 9 and the pit ground to heighten the installation height of the car buffer 9, and meanwhile, the second arrival switch 11 acts, so that the elevator can carry out maintenance operation in an upward or downward direction, and at the moment, because the car buffer 9 is raised, even if the pit depth is small, the pit can be ensured to have enough danger avoiding space, so that the safety of the elevator maintainer in the pit can not be endangered;
step (4), before the elevator overhauls and descends to be in contact with the car buffer 9 lifted by the lifting seat 8, the elevator car 7 triggers the limit switch 12, and the limit switch 12 acts to make the elevator unable to descend and stop descending;
and (5) after the elevator maintenance personnel finish maintenance in the pit, manually detaching the heightening seat 8 from the car buffer 9 by the elevator maintenance personnel, resetting the heightening seat 8 to the edge of a shaft, resetting the car buffer 9 to the original installation position, simultaneously actuating the first arrival switch 10, enabling the elevator maintenance personnel to leave the pit through any door 1 capable of entering the pit, closing any door 1 capable of entering the pit outside the hall, manually resetting the detection switch 3, and finally operating the electrical resetting device 5 to enable the electrical safety system to reset to enable the elevator to recover to a normal operation state.
Specifically, in the embodiment, in the step (3), only when the electrical safety system is actuated and the second on-position switch 11 is actuated, the elevator car 7 can perform the maintenance operation in the upward or downward direction.
Specifically, in the scheme of the present embodiment, in the step (4), the limit switch 12 is only valid in the elevator maintenance state, and the limit switch 12 is shielded and disabled in the elevator normal operation state.
Specifically, in the present embodiment, in the step (5), the resetting of the electrical safety system and the returning of the elevator to the normal operation state can be realized only by the following operations: in a state where the first in-position switch 10 is actuated and any door 1 that can enter the pit is closed and the detection switch 3 is reset, the electrical reset device 5 is operated to reset the electrical safety system.
Specifically, in this embodiment, in the step (5), the electrical safety system is not reset due to a power failure of the elevator.
Specifically, in the embodiment, in the step (5), the elevator can normally operate only when the electrical safety system is not operated and the first position switch 10 is operated.
According to the elevator, the control device of the depth of the shallow pit is arranged in the elevator, and the control method of the depth of the shallow pit of the elevator is adopted, so that when an operator opens any door 1 which can enter the pit outside a hall and tries to enter the pit for maintenance, the detection switch 3 acts, the electrical safety system is triggered to act, and the normal operation of the elevator is stopped; at the moment, the heightening seat 8 is positioned at the edge of a shaft, the first in-place switch 10 acts, the elevator car 7 can only perform emergency electric operation in the upward direction, an operator manually installs the heightening seat 8 between the car buffer 9 and the ground of a pit after entering the pit so as to improve the installation height of the car buffer 9, and meanwhile, the second in-place switch 11 acts, the elevator can perform overhaul operation in the upward or downward direction, and at the moment, as the car buffer 9 is lifted, even if the depth of the pit is small, a sufficient danger avoiding space of the pit can be ensured, so that the safety of pit maintainers cannot be endangered; when the elevator maintenance is carried down to the time of contacting with the car buffer 9 lifted by the lifting seat 8, the limit switch 12 is operated, so that the elevator can not carry out the downward movement. When the elevator maintenance personnel overhaul at the pit and finish the back, the elevator maintenance personnel manual will increase seat 8 with car buffer 9 is detached, and will increase seat 8 and reset to the well edge, will car buffer 9 resets to original mounted position, and first arrival switch 10 action simultaneously, elevator maintenance personnel pass through any door 1 that can get into the pit leaves the pit, and any door 1 that can get into the pit outside the hall closes, and manual messenger detection switch 3 resets, operates at last electrical reset device 5 makes electrical safety system resets and makes the elevator resume to normal operating condition. The control device and the control method for the depth of the shallow pit ensure that the pit has enough danger avoiding space, and ensure the safety of overhaul personnel of the pit elevator.
The technical solutions provided by the embodiments of the present invention are described in detail above, and the principles and embodiments of the present invention are explained herein by using specific examples, and the descriptions of the embodiments are only used to help understanding the principles of the embodiments of the present invention; meanwhile, for a person skilled in the art, according to the embodiments of the present invention, there may be variations in the specific implementation manners and application ranges, and in summary, the content of the present description should not be construed as a limitation to the present invention.
Claims (10)
1. The utility model provides a controlling means of elevator shallow pit depth which characterized in that: including any doors that may enter the pit, electrical safety systems, detection switches, limit switches, electrical reset devices, booster seats and car bumpers; any door capable of entering the pit is provided with a trigger door lock; the detection switch is arranged close to one end of the trigger door lock, and the trigger door lock is connected with the detection switch through touch; the detection switch is electrically connected with the electrical safety system; the electrical resetting device is arranged on the outer wall of the well; the car buffer is arranged in the middle of the pit; the electrical reset device is electrically connected with the electrical safety system; the heightening seat is arranged at the edge of a shaft or between the car buffer and the ground of a pit, when the heightening seat is arranged at the edge of the shaft wall, the ascending or descending operation of the elevator car is not influenced, and when the heightening seat is arranged between the car buffer and the ground of the pit, the car buffer is lifted; the limit switch is installed on the lower extreme lateral wall of well wall, limit switch with elevator car's contact point is higher than car buffer top, when the elevator overhaul descend to with by after the increase seat is raised before the car buffer contact, elevator car triggers limit switch, limit switch action for the elevator stops to descend.
2. The control device for the depth of the shallow pit of the elevator as claimed in claim 1, wherein: the first in-place switch is mounted on one side of the pit far away from the edge of the well; the first in-place switch is used for detecting whether the heightening seat is positioned at the edge of a shaft, and the second in-place switch is arranged on one side of the car buffer; the second switch that targets in place is used for detecting whether increase the seat and install between car buffer and pit ground.
3. The control device for the depth of the shallow pit of the elevator as claimed in claim 2, wherein: the triggering door lock comprises a door lock body and a door lock bolt; the door lock bolt is arranged inside the door lock body; one end of the lock tongue of the door lock touches the detection switch through action, and the detection switch triggers the electric safety system to act to stop the normal operation of the elevator.
4. The control device for the depth of the shallow pit of the elevator as claimed in claim 1, wherein: the electrical resetting device is arranged on the outer wall of the shaft which is easy to be contacted by an elevator maintainer.
5. The method for controlling the depth of the shallow pit of the elevator as claimed in any one of claims 1 to 4, comprising the steps of:
step (1), when an elevator maintainer opens any door capable of entering a pit outside a hall and tries to enter the pit for maintenance, the door capable of entering the pit touches the detection switch by triggering a door lock, the detection switch acts, the electrical safety system is further triggered to act, and the normal operation of the elevator is stopped;
step (2), an elevator maintainer enters the pit through any door which can enter the pit, at the moment, the heightening seat is positioned at the edge of the shaft, the first arrival switch acts, and the elevator car can only carry out emergency electric operation in the upward direction, so that the safety of the elevator maintainer in the pit is not endangered;
step (3), after entering a pit, an elevator maintainer manually installs the heightening seat between the car buffer and the ground of the pit to improve the installation height of the car buffer, and meanwhile, the second in-place switch acts to enable the elevator to carry out maintenance operation in an upward or downward direction, and at the moment, the car buffer is lifted up, so that even if the depth of the pit is smaller, the pit can be ensured to have enough danger avoiding space, and the safety of the elevator maintainer of the pit can not be endangered;
step (4), when the elevator is overhauled and goes down to the position where the elevator car is contacted with the car buffer lifted by the lifting seat, the elevator car triggers the limit switch, and the limit switch acts to enable the elevator not to go down and stop descending;
and (5) after the elevator maintenance personnel finish maintenance in the pit, manually detaching the heightening seat from the car buffer by the elevator maintenance personnel, resetting the heightening seat to the edge of a shaft, resetting the car buffer to the original installation position, simultaneously performing a first in-place switch action, enabling the elevator maintenance personnel to leave the pit through any door capable of entering the pit, closing any door capable of entering the pit outside a hall, manually resetting the detection switch, and finally operating the electrical resetting device to reset the electrical safety system to enable the elevator to recover to a normal operation state.
6. The method for controlling the depth of the shallow pit of the elevator as claimed in claim 5, wherein: in the step (3), the elevator car can perform the maintenance operation in an upward or downward direction only when the electric safety system is actuated and the second position switch is actuated.
7. The control device and the control method for the depth of the elevator shallow pit according to claim 5, characterized in that: in the step (4), the limit switch is only effective in an elevator maintenance state, and the limit switch is shielded and failed in an elevator normal operation state.
8. The control device and the control method for the depth of the elevator shallow pit according to claim 5, characterized in that: in step (5), the resetting of the electrical safety system and the restoration of the elevator to the normal operating state can be achieved only by: operating the electrical reset device to reset the electrical safety system in a state where the first in-position switch is actuated and any door that can enter the pit is closed and the detection switch is reset.
9. The control device and the control method for the depth of the elevator shallow pit according to claim 5, characterized in that: in step (5), the electrical safety system is not reset due to a power failure of the elevator.
10. The control device and the control method for the depth of the elevator shallow pit according to claim 5, characterized in that: in the step (5), the elevator can be normally operated only when the electric safety system is not operated and the first on-position switch is operated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010126727.XA CN111285223A (en) | 2020-02-28 | 2020-02-28 | Control device and control method for depth of shallow pit of elevator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010126727.XA CN111285223A (en) | 2020-02-28 | 2020-02-28 | Control device and control method for depth of shallow pit of elevator |
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| Publication Number | Publication Date |
|---|---|
| CN111285223A true CN111285223A (en) | 2020-06-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010126727.XA Pending CN111285223A (en) | 2020-02-28 | 2020-02-28 | Control device and control method for depth of shallow pit of elevator |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202296678U (en) * | 2011-09-23 | 2012-07-04 | 快意电梯有限公司 | Elevator buffer device and an elevator pit or car top safety overhauling device |
| CN108059051A (en) * | 2018-01-18 | 2018-05-22 | 杭州西奥电梯有限公司 | Overhauling elevator safety guarantee control device and its safety guarantee control method |
| CN209065218U (en) * | 2018-10-31 | 2019-07-05 | 杭州西奥电梯有限公司 | A kind of electrical system of shallow pit vertical lift |
| CN110422743A (en) * | 2019-08-01 | 2019-11-08 | 上海三菱电梯有限公司 | A kind of protective device of overhauling elevator |
| CN209601869U (en) * | 2018-12-21 | 2019-11-08 | 日立电梯（中国）有限公司 | A kind of removable arresting stop of the screw of elevator |
-
2020
- 2020-02-28 CN CN202010126727.XA patent/CN111285223A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202296678U (en) * | 2011-09-23 | 2012-07-04 | 快意电梯有限公司 | Elevator buffer device and an elevator pit or car top safety overhauling device |
| CN108059051A (en) * | 2018-01-18 | 2018-05-22 | 杭州西奥电梯有限公司 | Overhauling elevator safety guarantee control device and its safety guarantee control method |
| CN209065218U (en) * | 2018-10-31 | 2019-07-05 | 杭州西奥电梯有限公司 | A kind of electrical system of shallow pit vertical lift |
| CN209601869U (en) * | 2018-12-21 | 2019-11-08 | 日立电梯（中国）有限公司 | A kind of removable arresting stop of the screw of elevator |
| CN110422743A (en) * | 2019-08-01 | 2019-11-08 | 上海三菱电梯有限公司 | A kind of protective device of overhauling elevator |
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Application publication date: 20200616 |