CN113682934B

CN113682934B - Synchronous locking device about elevator sedan-chair door

Info

Publication number: CN113682934B
Application number: CN202110932771.4A
Authority: CN
Inventors: 谭晓亨; 苏诗妍; 张文燕
Original assignee: Hitachi Elevator China Co Ltd
Current assignee: Hitachi Elevator China Co Ltd
Priority date: 2021-08-13
Filing date: 2021-08-13
Publication date: 2023-05-02
Anticipated expiration: 2041-08-13
Also published as: CN113682934A

Abstract

The invention discloses an up-down synchronous locking device of an elevator car door, which comprises an upper locking mechanism of the car door, wherein the upper locking mechanism of the car door comprises an upper locking seat and an upper locking hook which are in locking fit, the upper locking seat is fixedly arranged between two door hanging plates of a door machine, a car door plate is arranged below each door hanging plate, the upper locking hook is rotatably arranged on one door hanging plate, and the upper locking hook is connected with a lower locking mechanism of the car door through a transmission connecting mechanism; the lower locking mechanism of the car door comprises a lower locking hook and a lower locking seat which are in locking fit, the lower locking hook is rotatably arranged at the lower part of the car door plate positioned below the upper locking hook, and the lower locking seat is fixedly arranged at the lower part of the other car door plate; the lower latch hook and the upper latch hook can simultaneously rotate under the linkage action of the transmission connecting mechanism. The invention can realize the up-down simultaneous locking of the car door, effectively avoid the safety problem of the splayed gap caused by forced opening of the car door, has simple structure, lower cost and stable unlocking control force.

Description

Synchronous locking device about elevator sedan-chair door

Technical Field

The invention relates to the technical field of elevator door systems, in particular to an up-down synchronous locking device for an elevator car door.

Background

At present, along with the increase of high-rise buildings, the elevator increasingly becomes a convenient and quick transport tool in daily life, and meanwhile, the safety performance of the elevator is very important to be ensured. The door system is one of important component systems of the elevator, and in the prior accident case, the door system accident occupies a certain proportion, and has a certain influence on the safety of the elevator.

When the car stays in a non-flat area due to a power outage or malfunction during operation, passengers in the car may intend to open the doors by their own force to get out of the way. To ensure passenger safety, it should be ensured that the doors cannot be opened when the elevator is in a non-flat landing area. At present, the car door locks are basically arranged on the door machine, namely, the car door locks are only arranged at the upper ends of the car doors. Because the car door lock unblanks and has certain stroke, so when the elevator is stopped in the non-flat layer area, when the car door is forcefully opened in the car, the car door can open certain clearance first, and the latch hook only contacts the lock seat. Assuming that the spacing wheel of the door pulley block assembly has a 1mm reserved gap from the door guide rail, and the gap is shared by abrasion and sinking of the car door, taking the car door with the size of 400 multiplied by 2800 as an example, when the car door rotates to the limit position by taking the roller closest to the lock hook as a pivot, as shown in the left side of fig. 7, the gap in the shape of an eight appears because of no lock hook at the lower part of the car door, according to the rule of proportionality of corresponding edges of similar triangles, the gap at the lower part of the car door at the maximum is 14mm, and since the car door lock is unlocked, a certain stroke is used, and the unlocking stroke is calculated by taking the car door lock unlocking stroke as an example, as shown in the right side of fig. 7, the maximum of 60mm can reach the maximum value (50 mm) allowed by the national standard, and as the door machine is higher, the gap at the lower part is bigger. When the gap exceeds national standard, in the non-door opening area, the hand can extend out of the car door, and the car door is opened by pulling the pull rope, so that a falling accident can be caused.

Disclosure of Invention

The invention aims to provide an up-down synchronous locking device for an elevator car door, which can effectively solve the problem that a splayed gap in the prior art is overdrived by forcedly opening the door by adopting a mode of simultaneously locking the car door at the upper part and the lower part, and prevent accidents caused by opening the door of the elevator in a non-door opening area.

In order to achieve the above purpose, the present invention adopts the following technical scheme:

the upper locking mechanism comprises an upper locking seat and an upper locking hook which are in locking fit, the upper locking seat is fixedly arranged between two door machine hanging plates on a door machine, a door plate of the door machine is arranged below each door machine hanging plate, the upper locking hook is rotatably arranged on one door machine hanging plate through an upper locking hook shaft, and the upper locking hook is connected with a lower locking mechanism of the door machine through a transmission connecting mechanism; the lower locking mechanism of the car door comprises a lower locking hook and a lower locking seat which are in locking fit, the lower locking hook is rotatably arranged at the lower part of the car door plate positioned below the upper locking hook through a lower locking hook shaft, and the lower locking seat is fixedly arranged at the lower part of the other car door plate; the lower lock hook and the upper lock hook can simultaneously rotate under the linkage action of the transmission connecting mechanism.

Further, a detection switch is arranged below the lower lock hook and is electrically connected with the elevator control device. Thus, the detection switch can be used for detecting and transmitting an unlocking signal or a falling locking signal.

Further, the first clearance distance between the upper lock hook and the upper lock seat is twice as long as the second clearance distance between the lower lock hook and the lower lock seat, and the first clearance distance is less than or equal to 50mm. Thus, the first clearance distance L1 corresponds to the upper unlocking stroke, the second clearance distance L2 corresponds to the lower unlocking stroke, and the opening distance of the lower part of the car door when the door is forced to open is ensured to meet national standard requirements by setting 2 x L1=L2 to be less than or equal to 50mm, so that passengers in the car are protected.

Further, the lower lock seat is positioned in the car door sill groove, so that the lower lock seat can be hidden in the car door sill groove, and when the door is opened, the locking mechanism at the lower part of the car door cannot be seen from the outside, and the structure is attractive.

Further, transmission coupling mechanism includes driving lever, rotation pendulum rod and canceling release mechanical system, the rotation pendulum rod passes through the pendulum rod pivot rotation and sets up on being located the sedan-chair door plant of upper latch hook below, lower latch hook is equipped with the guide way of slope distribution, the rotation of the lower part of rotation pendulum rod be equipped with guide way complex lower gyro wheel, the driving lever is fixed the lower part of upper latch hook, the upper portion of rotation pendulum rod is supported and is connected the driving lever orientation the side surface of lock seat, canceling release mechanical system can drive the upper portion of rotation pendulum rod maintains orientation the trend of driving lever direction rotation. Therefore, the deflector rod can push the rotary swing rod to rotate around the swing rod rotating shaft, so that the lower roller is driven to jack up and rotate the lower lock hook by using the obliquely distributed guide grooves, and unlocking of the lower lock hook is completed; when the acting force on the rotary swing rod is removed by the deflector rod, the rotary swing rod can be restored to the initial position state by the aid of the reset mechanism.

Further, the reset mechanism is a spring, one end of the spring is arranged on the car door plate below the upper lock hook, and the other end of the spring is arranged at one end of the rotary swing rod, which is close to the deflector rod.

Further, the guide groove is positioned at the upper part of the lower lock hook, and the guide groove is inclined downwards towards one side of the lower lock hook shaft of the lower lock hook. Therefore, in the horizontal direction, the position of the guide groove is higher than the position of the lower lock hook shaft, and the lower roller can be ensured to jack up and rotate the lower lock hook upwards.

Further, the guide groove is a linear or arc-shaped strip-shaped through groove.

Further, an upper roller in rolling abutting connection with the deflector rod is arranged on the upper portion of the rotary swing rod. Therefore, by adopting rolling fit connection contact, the friction force is small, and the service life is long.

Further, in the locking state, an included angle between a connecting line of the lower roller and the lower lock hook shaft and the rotating swing rod is smaller than 90 degrees. Therefore, the lower lock hook has a self-locking function, the lower lock hook can be prevented from jumping under the action of external force, and the safety of the elevator is improved.

Compared with the prior art, the invention provides an up-down synchronous locking device for an elevator car door, which has the following beneficial effects:

the invention is provided with the lower locking mechanism of the car door, realizes the lower locking of the car door through the lower locking hook and the lower locking seat which are arranged at the lower part of the door plate of the car door, and realizes the up-down simultaneous locking of the car door through the linkage action of the transmission connecting mechanism and the upper locking mechanism of the car door on the door machine, thereby effectively avoiding the danger caused by the splayed gap of the car door due to forced opening. The locking mechanism at the lower part of the car door has a self-locking function, and can effectively prevent the lower lock hook from jumping when uncontrollable factors such as manually pushing and knocking the car door occur, thereby improving the safety of the elevator. In addition, the invention has simple structure and lower cost, adopts the rotary swing rod to control the lower lock hook to unlock, has stable unlocking control force compared with the unlocking control mode of pulling the lower lock hook through a steel wire rope, a pull rod and the like, has no uncertain force loss caused by gravity, friction and the like generated by an intermediate transmission piece, has small unlocking force and is convenient to adjust, thereby ensuring the stability of unlocking; the invention is independent of other door machine action systems, and can be additionally arranged on the basis of not affecting the original door machine system; the full-mechanical transmission system is adopted, no electric signal is needed, the reliability is high, and the risk of misoperation is low; the contact movement parts of the invention are all in rolling fit, the friction is small, and the service life is long.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.

FIG. 1 is a schematic view of the structure of the present invention in a door-closed state;

FIG. 2 is an enlarged schematic view of a detail A in FIG. 1;

FIG. 3 is a schematic diagram of the invention unlocking when the door is opened in a flat zone;

FIG. 4 is a schematic view of the present invention during door opening or closing in a flat zone;

fig. 5 is a schematic diagram of the principle of self-locking of the lower locking mechanism of the car door after closing the door;

fig. 6 is a schematic view of the forced door opening in a non-flat zone car of the present invention;

fig. 7 is a schematic diagram of a forced opening of a door in a car in a non-flat landing zone.

Reference numerals: 1. a locking mechanism at the upper part of the car door; 11. locking the seat; 12. an upper latch hook; 13. an upper latch hook shaft; 2. a door machine; 3. a door machine hanging plate; 4. a car door panel; 5. a transmission connection mechanism; 51. a deflector rod; 52. rotating the swing rod; 53. a spring; 54. a swing rod rotating shaft; 55. a lower roller; 56. an upper roller; 6. a lower locking mechanism of the car door; 61. a lower latch hook; 611. a guide groove; 62. a lower lock base; 63. a lower latch hook shaft; 7. a detection switch; 8. a car door sill groove; l1, a first gap distance; l2, a second gap distance; alpha, included angle; F. an external force; w, rotation force.

Detailed Description

The technical solutions of the present invention will be clearly and completely described below by means of detailed embodiments in conjunction with the accompanying drawings, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

Referring to fig. 1-6, the embodiment provides an up-down synchronous locking device for an elevator car door, which comprises a car door upper locking mechanism 1, wherein the car door upper locking mechanism 1 comprises an upper locking seat 11 and an upper locking hook 12 which are in locking fit, the upper locking seat 11 is fixedly arranged between two door machine hanging plates 3 on a door machine 2, a car door plate 4 is arranged below each door machine hanging plate 3, the upper locking hook 12 is rotatably arranged on one door machine hanging plate 3 through an upper locking hook shaft 13, and the upper locking hook 12 is connected with a car door lower locking mechanism 6 through a transmission connecting mechanism 5. The lower door locking mechanism 6 comprises a lower locking hook 61 and a lower locking seat 62 which are in locking fit. The lower latch hook 61 is rotatably disposed at the lower part of the door panel 4 below the upper latch hook 12 through a lower latch hook shaft 63, can rotate around the lower latch hook shaft 63, and moves horizontally along with the door panel 4 in the door opening and closing direction during door opening and closing. The lower lock seat 62 is fixedly arranged at the lower part of the other car door plate 4, and can horizontally move along with the car door plate 4 in the door opening and closing direction in the door opening and closing process. The lower latch hook 61 and the upper latch hook 12 can simultaneously rotate under the linkage action of the transmission connecting mechanism 5. So, provided with sedan-chair door lower part locking mechanical system 6, realized sedan-chair door lower part locking through installing in the lower latch hook 61 and the lower lock seat 62 of sedan-chair door lamina 4 lower part to through transmission coupling mechanism 5 and the sedan-chair door upper portion locking mechanical system 1 linkage effect on the door machine 2, thereby realize sedan-chair door locking simultaneously from top to bottom, effectively avoided the sedan-chair door to open the danger that the splayed clearance that leads to causes because of forcing, have simple structure, advantage with low costs. In addition, the door machine is independent of other door machine action systems, so that the door machine can be additionally installed on the basis of not affecting the original door machine system; and a full-mechanical transmission system is adopted, no electric signal is needed, the reliability is high, and the risk of misoperation is low.

With reference to fig. 1 and 2, the transmission connection mechanism 5 includes a shift lever 51, a rotary swing rod 52, and a reset mechanism. The rotating swing rod 52 is rotatably arranged on the car door plate 4 below the upper lock hook 12 through a swing rod rotating shaft 54, can rotate and swing around the swing rod rotating shaft 54, and can horizontally move along with the car door plate 4 when the car door is opened or closed. The lower latch hook 61 is provided with a guide groove 611 which is distributed in an inclined way, and the lower part of the rotary swing rod 52 is rotatably provided with a lower roller 55 which is in linkage fit with the guide groove 611. The deflector rod 51 is fixed at the lower part of the upper latch hook 12, rotates along with the lifting and falling of the upper latch hook 12, and can horizontally move along with the door hanger plate 3 when the door is opened and closed. The upper part of the rotary swing rod 52 is abutted against and connected with the side surface of the deflector rod 51 facing the upper lock seat 11, and the reset mechanism can drive the upper part of the rotary swing rod 52 to maintain the rotation trend towards the deflector rod 51. In this way, the deflector rod 51 can push the rotary swing rod 52 to rotate around the swing rod rotating shaft 54, so that the lower roller 55 is driven to jack up and rotate the lower lock hook 61 by using the obliquely distributed guide grooves 611, and unlocking of the lower lock hook is completed; when the driving lever 51 removes the force applied to the rotary swing link 52, the rotary swing link 52 can be restored to the original position state by the restoring mechanism. Because the lower lock hook 61 is controlled to unlock by adopting the rotary swing rod 52, compared with an unlocking control mode of pulling the lower lock hook through a steel wire rope, a pull rod and the like, the unlocking control force is stable, uncertain force loss caused by gravity, friction and the like generated by an intermediate transmission piece is avoided, the unlocking force is small, and the adjustment is convenient, so that the unlocking stability is ensured.

Referring to fig. 5, in order to enable the door lower locking mechanism 6 to have a self-locking function, in the locked state, an angle α between the line connecting the lower roller 55 and the lower hook shaft 63 and the swing link 52 is smaller than 90 °. Therefore, when uncontrollable factors such as manually pushing and knocking the car door and the like occur, the lower lock hook can be prevented from jumping under the action of external force, and the safety of the elevator is improved.

Referring to fig. 1 to 4, as a preferred embodiment, the return mechanism is a spring 53, one end of the spring 53 is disposed on the door panel 4 below the upper lock hook 12, and the other end of the spring 53 is disposed at one end of the rotating swing link 52 near the deflector 51. More specifically, the spring 53 is installed on the door plate 4 at a side far from the center of the door, so that the spring 53 has a pulling force after installation, and when the upper lock hook 12 and the upper lock seat 11 complete the locking, the rotating swing rod 52 can be pulled back to the initial state position by using the pulling force of the spring 53. In other embodiments, the spring 53 may be installed near the center of the door, so that the spring 53 has elastic force after installation, and when the upper latch hook 12 and the upper latch seat 11 complete the falling lock, the swing rod 52 may be rebounded to the initial state position by using the elastic force of the spring 53.

In some embodiments, as shown in fig. 2, the guide groove 611 is located at an upper portion of the lower latch hook 61, and the guide groove 611 is inclined downward toward a side of the lower latch hook shaft 63 of the lower latch hook 61. In this way, the guide groove 611 is located higher than the lower hook shaft 63 in the horizontal direction, so that it is ensured that the lower roller 55 can rotate the lower hook 61 upward.

As a preferred embodiment, the guide groove 611 is preferably a linear or curved bar-shaped through groove.

In some specific embodiments, referring to fig. 1, 3, 4 and 6, an upper roller 56 in rolling abutting connection with the deflector rod 51 is provided at an upper portion of the rotary swing rod 52. Therefore, by adopting rolling fit connection contact, the friction force is small, and the service life is long.

In some specific embodiments, referring to fig. 6, the first gap distance L1 between the upper latch hook 12 and the upper latch seat 11 is twice as large as the second gap distance L2 between the lower latch hook 61 and the lower latch seat 62, and the first gap distance L1 and the second gap distance L2 are both less than or equal to 50mm. Thus, the first clearance distance L1 corresponds to the upper unlocking stroke, the second clearance distance L2 corresponds to the lower unlocking stroke, and the opening distance of the lower part of the car door when the door is forced to open is ensured to meet national standard requirements by setting 2 x L1=L2 to be less than or equal to 50mm, so that passengers in the car are protected.

In some specific embodiments, as shown in fig. 1 to 6, the lower lock seat 62 is located in the car door sill groove 8, and thus, can be hidden in the car door sill groove 8, and the lower locking mechanism 6 of the car door is not seen from the outside when the door is opened, so that the structure is attractive.

In some specific embodiments, as shown in fig. 1 to 6, a detection switch 7 is disposed below the lower latch hook 61, and the detection switch 7 is electrically connected to an elevator control device. In this way, the detection switch 7 can be used to detect and transmit an unlock signal or a lock-down signal. Preferably, the detection switch 7 can be a switch with short triggering stroke, such as a micro-touch switch, so as to accurately detect the state of the switch door.

The working principle of the invention is as follows:

(1) When the elevator is normally opened in a flat landing zone (the process is in the sequence of fig. 1, 3 and 4): as the car door is opened, the upper lock hook 12 automatically rotates anticlockwise and lifts upwards, the upper lock hook 12 is separated from the upper lock seat 11, and the unlocking action of the upper part of the car door is completed; at the same time, the deflector rod 51 fixed on the upper latch hook 12 rotates and swings counterclockwise along with the upward rotation and lifting of the upper latch hook 12, and acts on the upper roller 56, so that the rotary swing rod 52 is driven to rotate and swing clockwise around the swing rod rotating shaft 54 against the acting force of the spring 53, the lower roller 56 at the lower part of the rotary swing rod 52 moves in the guide groove 611, the upper edge of the guide groove 611 is pushed by the lower roller 55 to provide a rotating force, the lower latch hook 61 rotates and lifts counterclockwise around the lower latch hook shaft 63, the unlocking action of the lower locking mechanism of the car door is completed, and the upper and lower car door locks are unlocked, as shown in fig. 3. The rotary swing rod 52 is adopted to control the unlocking of the lower lock hook 61, so that the unlocking control force is stable, and the unlocking force is small. When the lower lock hook 61 is lifted upwards to unlock, the detection switch 7 mounted at the lower part of the car door plate 4 transmits an unlocking signal. As the door hanger plate 3 of the door machine is operated, the door panel 4 of the car continues to horizontally move in the opening direction until it is completely opened, as shown in fig. 4.

(2) When the elevator is normally closed in a flat landing zone (the process is in the sequence of fig. 4, 3 and 1): the left and right car door plates 4 horizontally move along the closing direction, and when the car door plates 4 are closed to a locking area, as shown in fig. 3, the upper lock hook 12 rotates clockwise to fall back to finish the locking action; at the same time, the deflector rod 51 fixed on the upper latch hook 12 rotates clockwise to swing to the original position along with the falling of the upper latch hook 12, and the acting force on the upper roller 56 is removed; under the action of the spring 53, the rotary swing rod 52 rotates anticlockwise around the swing rod rotating shaft 54 to restore to the original position, at this time, the lower roller 55 connected to the lower part of the rotary swing rod 52 moves back to the original position in the guide groove 611, the action of the lower latch hook 61 is removed, the lower latch hook 61 rotates clockwise around the lower latch hook shaft 63 under the action of self gravity to fall back, and the falling locking action is completed; the detection switch 7 installed at the lower part of the door plate 4 transmits a falling lock signal, and at this time, the door is closed and the upper and lower parts are simultaneously locked, as shown in fig. 1. When the lower locking mechanism 6 of the car door is in a locking state, an included angle alpha is formed between the connecting line of the lower roller 55 and the lower locking hook shaft 63 and the rotating swing rod 52, the lower locking hook 61 cannot be opened due to the acting force of the rotating swing rod 52, and when the lower locking hook 61 is forcibly unlocked due to the action of the external force F, the lower locking hook 61 is pushed by the external force F to generate a counterclockwise rotating force W due to the included angle alpha being smaller than 90 degrees, and at the moment, the rotating swing rod 52 cannot rotate counterclockwise, so that a self-locking function is realized, unlocking caused by jumping of the lower locking hook 61 is effectively prevented, and the safety of an elevator is improved.

(3) When the elevator is forced to open the door in a non-flat zone: referring to fig. 6, if the elevator is forcibly opened from the closed state in the car in the non-flat zone, the upper locking hook 12 pulls the upper locking seat 11, and the upper part of the car door can be opened only by a slight distance L1 (i.e., an upper unlocking stroke), and the upper part of the car door is locked. Because the upper lock hook 12 cannot be lifted up in a rotating way, the deflector rod 51 fixed on the upper lock hook 12 moves horizontally along the door opening direction L1 along with the upper lock hook 12 but cannot rotate, the rotary swing rod 52 cannot be triggered to rotate, the lower roller 55 cannot drive the lower lock hook 61 to rotate and lift up around the lower lock hook shaft 63, at the moment, the lower lock hook 61 pulls the lower lock seat 62, the lower part of the car door can only be opened for a small distance L2 (namely, the lower unlocking stroke), the car door is locked up and down simultaneously, and the door opening gap when the car door is opened forcibly can meet national standard requirements only by setting 2 x L1=L2 which is less than or equal to 50mm, so that passengers in the car can be protected.

(4) When the elevator is used for rescue outside a hall: when the elevator is in a door opening area, the door opening mode of the rescue outside the hall is the same as the unlocking mode when the elevator is normally opened. When the elevator is in a non-door opening area, the landing door is firstly opened, the upper lock hook 12 is pulled through the pull rope, the upper lock hook 12 is further lifted to complete unlocking, the upper lock hook 12 is separated from the upper lock seat 11, and meanwhile, the action process of the transmission connecting mechanism 5 and the lower locking mechanism 6 of the car door is the same as that of the normal door opening of the flat landing area.

The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims

1. The utility model provides a synchronous locking device about elevator sedan-chair door, includes sedan-chair door upper portion locking mechanical system, sedan-chair door upper portion locking mechanical system includes locking complex lock seat and last latch hook, go up the fixed setting of lock seat and hang between the board two door machines on the door machine, every door machine is hung the below of board and is installed sedan-chair door board, go up the latch hook and rotate the setting on one of them door machine is hung the board through last latch hook axle, its characterized in that: the upper lock hook is connected with a lower locking mechanism of the car door through a transmission connecting mechanism; the lower locking mechanism of the car door comprises a lower locking hook and a lower locking seat which are in locking fit, the lower locking hook is rotatably arranged at the lower part of the car door plate positioned below the upper locking hook through a lower locking hook shaft, and the lower locking seat is fixedly arranged at the lower part of the other car door plate; the lower lock hook and the upper lock hook can simultaneously rotate under the linkage action of the transmission connecting mechanism; the transmission connecting mechanism comprises a deflector rod, a rotation swinging rod and a reset mechanism, wherein the rotation swinging rod is rotatably arranged on a car door plate positioned below the upper lock hook through a swinging rod rotating shaft, the lower lock hook is provided with a guide groove which is obliquely distributed, the guide groove is positioned on the upper part of the lower lock hook, the guide groove faces to one side of a lower lock hook shaft of the lower lock hook obliquely downwards, a lower roller matched with the guide groove is rotatably arranged on the lower part of the rotation swinging rod, the deflector rod is fixed on the lower part of the upper lock hook, the upper part of the rotation swinging rod is propped against and connected with the side surface of the deflector rod facing to the upper lock seat, and the reset mechanism can drive the upper part of the rotation swinging rod to maintain the trend of rotating towards the direction of the deflector rod.

2. The elevator car door up-down synchronous locking device according to claim 1, wherein: and a detection switch is arranged below the lower lock hook and is electrically connected with the elevator control device.

3. The elevator car door up-down synchronous locking device according to claim 1, wherein: the first clearance distance between the upper lock hook and the upper lock seat is equal to the second clearance distance between the lower lock hook and the lower lock seat, and the second clearance distance are both less than or equal to 50mm.

4. The elevator car door up-down synchronous locking device according to claim 1, wherein: the lower lock seat is positioned in the car door sill groove.

5. The elevator car door up-down synchronous locking device according to claim 1, wherein: the reset mechanism is a spring, one end of the spring is arranged on the car door plate below the upper lock hook, and the other end of the spring is arranged at one end of the rotary swing rod, which is close to the deflector rod.

6. The elevator car door up-down synchronous locking device according to claim 1, wherein: the guide groove is an arc-shaped or linear strip-shaped through groove.

7. The elevator car door up-down synchronous locking device according to claim 1, wherein: the upper part of the rotary swing rod is provided with an upper roller connected with the deflector rod in a rolling abutting connection way.

8. The elevator car door up-down synchronous locking device according to claim 1, wherein: in the locking state, the included angle between the connecting line of the lower roller and the lower lock hook shaft and the rotating swing rod is smaller than 90 degrees.