CN114634081A

CN114634081A - Device for preventing foreign matters from being clamped by elevator door and detection method

Info

Publication number: CN114634081A
Application number: CN202210095148.2A
Authority: CN
Inventors: 李俊凯; 吴达彪; 陈承海
Original assignee: Zhejiang Zhiling Technology Co ltd
Current assignee: Zhejiang Zhiling Technology Co ltd
Priority date: 2022-01-26
Filing date: 2022-01-26
Publication date: 2022-06-17
Anticipated expiration: 2042-01-26
Also published as: CN114634081B

Abstract

The invention discloses an elevator door foreign matter clamping prevention device, which comprises a baffle and a detection switch, wherein the baffle is rotatably arranged on a door frame, the detection switch is fixed on the door frame and is triggered after the baffle rotates, and the detection switch is connected with a control system of an elevator, and is characterized in that: install the elastic support piece who is used for withstanding the baffle on the door frame, detection switch adopts rotary encoder, rotary encoder is fixed in on the door frame through the installing support, rotary encoder's center pin's one end is connected down the carousel through lower one-way bearing. The invention adopts the four-connecting-rod type transmission principle, the rotating angular speed of the lower rotating disc is greater than that of the baffle plate, and the reaction speed of the rotary encoder is increased.

Description

Device for preventing foreign matters from being clamped by elevator door and detection method

Technical Field

The invention relates to the field of elevators, in particular to an elevator door foreign matter clamping prevention device and a detection method.

Background

The door system of the elevator is an important component of the elevator, and is an electromechanical integrated device for directly controlling opening and closing the door, and the elevator door is a mechanical device directly contacting with people, so that the safety and the importance of the elevator are self-evident.

In order to ensure that the car door is smoothly opened, a certain gap is formed between the car door and the door frame of the elevator, so that rubbing with the door frame is avoided, certain potential safety hazards exist in the gap between the car door and the door frame of the elevator, and in the process of opening the car door, if a passenger puts a hand on the surface of the car door, the hand is easily brought into a gap, especially a child group, and the finger of the child is thin and lacks protection consciousness, so that the hand is more easily brought into the gap between the car door and the door frame of the elevator, and safety accidents are caused.

Application No.: chinese patent of invention CN201980069682.2 discloses a safety device for preventing hands from being pinched in an elevator, which comprises: the structure is simple in plan view by using the magnet and the high-frequency/ultrasonic switch, and the passenger is warned of the hand clamping by the warning lamp or the warning sound to prevent the hand clamping. A high frequency switch or an ultrasonic switch is used as a switch which is arranged between the first magnets, is arranged on the supporting frame and is connected with a controller for controlling the operation of the elevator and the elevator door. The rotating frame is rotatably installed at one end of the fixed frame, and the rotating frame is rotated to activate the switch to stop the operation of the elevator door or control the opening and closing speed thereof when the hand of the person is caught in the gap, thereby preventing the hand of the person from entering the gap. But it has the disadvantages that: the rotating frame needs to rotate a certain angle to realize the trigger switch, and the fingers of the children are clamped in the gaps at a deeper distance. And the space that the rotating frame continues to rotate is less at this moment, and if the fingers are tightly clamped, the rotating frame is safely taken out, so that certain operation difficulty is also provided.

Disclosure of Invention

The invention aims to provide an elevator door foreign matter clamping prevention device with more accurate triggering and a detection method.

The technical scheme adopted by the invention for solving the problems is as follows:

the utility model provides a foreign matter device is prevented pressing from both sides by lift-cabin door, includes baffle and detection switch, the baffle rotates to be installed on the door frame, and detection switch is fixed in on the door frame and triggers after the baffle is rotatory, the control system of detection switch connection elevator, its characterized in that: install the elastic support piece who is used for withstanding the baffle on the door frame, detection switch adopts rotary encoder, rotary encoder is fixed in on the door frame through the installing support, rotary encoder's the one end of center pin is connected down the carousel through lower one-way bearing, and rotary encoder's center pin and lower carousel are fixed respectively to lower one-way bearing's inner circle and outer lane, the dog-ear department of baffle is fixed with the support frame, the one end of the articulated lower connecting rod of support frame, the articulated lower carousel of other end of lower connecting rod, the one-way bearing working direction cooperatees with the rotatory degree of freedom direction of baffle down.

Preferably, a microswitch of a lower link for sensing is fixed to the mounting bracket.

Further, as preferred, the transmitting plate and the receiving plate of the elevator light curtain are respectively fixed on two mounting plates, the mounting plates are vertically slidably mounted on the door plate through sliding rails, a light curtain pressure spring for pushing the mounting plates downwards is mounted on the door plate, a limiting block for limiting is fixed on the door plate, a pulley is rotatably mounted on the door plate, one end of a traction rope is fixed on the mounting plates, the traction rope is wound on the pulley, a connecting seat is fixed on the door plate, a sliding rod is slidably mounted on the connecting seat, one end of the sliding rod is fixed at the other end of the traction rope, a push plate is fixed on the sliding rod, the central shaft penetrates through the rotary encoder, the other end of the central shaft is connected with an upper rotating disc through an upper one-way bearing, the inner ring and the outer ring of the upper one-way bearing are respectively fixed on the central shaft and the rotating disc of the rotary encoder, a shift lever is slidably mounted on the door frame, and a stop block is fixed on the shift lever, the driving lever is sleeved with a driving lever pressure spring for driving the driving lever to return to an initial state, two ends of the upper connecting rod are respectively hinged with one end of the driving lever and the upper rotating disc, and the working direction of the upper one-way bearing is matched with the sliding direction of the driving lever.

Further, as preferred, the door plant passes through the link spare to be fixed on the link plate, the pulley rotation is installed on the link spare.

Further, as preferred, the middle part of push pedal is fixed with the guide post, the guide post horizontal sliding mount is on the door plant.

Preferably, the elastic support member is a hydraulic support rod, one end of the hydraulic support rod is hinged to the door frame, and the other end of the hydraulic support rod is hinged to the support frame.

Further, preferably, the lower rotary table and the upper rotary table are respectively located at the lower end and the upper end of the rotary encoder.

Compared with the prior art, the invention has the following advantages and effects:

(1) through the rotation of baffle to rotating the carousel and rotating under the drive of lower connecting rod, making rotary encoder produce pulse signal, owing to adopted four connecting rod formula's transmission principle, consequently the rotation angular velocity of carousel can be greater than the rotation angular velocity of baffle down, has enlargied rotary encoder's reaction rate, and in the link of opening the door of elevator, the baffle just can judge fast whether there is the foreign matter card to go into the gap as long as rotate and be greater than preset the angle.

(2) After rotary encoder is triggered, the baffle can continue to rotate, and the baffle rotates the back, and gap width grow has reduced and has pressed from both sides the circumstances more tight more and take place, can improve gap width through continuing to rotate the baffle, pulls out the finger, conveniently rescues.

(3) At the tail end of the door closing stroke, the transmitting plate and the receiving plate of the elevator light curtain synchronously move upwards, at the moment, if the thin rope is positioned between the left door plate and the right door plate, the infrared rays between the transmitting plate and the receiving plate can be blocked, so that the control system immediately outputs a door opening signal, the left door plate and the right door plate stop closing and rotate reversely to open until the blocking object leaves the warning area, and then the elevator door can be normally closed, so that the safety protection purpose is achieved, and the occurrence of accidents caused by people in the elevator can be avoided.

(4) Because the synchronism of the push pedal of left door board side, the synchronism of the push pedal of right door board side directly influences the synchronous rebound's of transmitting plate and receiving plate of elevator light curtain synchronism, through the driving lever, go up the connecting rod, go up the carousel, one-way bearing drives rotary encoder's center pin, if there is the deviation in the center pin rotation angle synchronism of left door board side, right door board side rotary encoder, the system can judge the push pedal of left door board side rapidly, which specific arrival of push pedal of right door board side and contact stop dog earlier, make things convenient for the later stage staff to maintain the regulation.

(5) Through two one-way bearings about the configuration, utilize one-way characteristic of one-way bearing, only need dispose a rotary encoder and can realize the setting of preventing tong under the state of opening the door and the adjustment of the light curtain under the state of closing the door and detect.

Drawings

Fig. 1 is a schematic view of a conventional mounting structure of a door panel on a car.

FIG. 2 is a schematic top view of a layout of a left door panel and a right door panel according to an embodiment of the present invention.

Fig. 3 is a schematic top view at B in fig. 2 according to the embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a location a in fig. 2 according to an embodiment of the present invention.

Fig. 5 is a schematic structural diagram of the baffle in the initial state according to the embodiment of the invention.

FIG. 6 is a schematic structural diagram of the baffle plate according to the embodiment of the present invention in a rotating state.

FIG. 7 is a schematic view of the structure of the push plate and the stop block of the embodiment of the invention when the push plate and the stop block are not in contact.

FIG. 8 is a schematic structural diagram of the push plate and the stop block after contacting with each other according to the embodiment of the present invention.

Fig. 9 is a schematic view of an installation structure of a light curtain pressure spring according to an embodiment of the present invention.

Fig. 10 is a schematic view of an installation structure of a limiting block according to an embodiment of the invention.

Reference numerals: the hanging plate comprises a hanging plate guide rail 11, a left hanging plate 12, a right hanging plate 13, a door plate 2, a transmitting plate 31, a receiving plate 32, a door frame 40, a baffle 41, an elastic supporting piece 42, a rotary encoder 43, a mounting bracket 44, a lower rotary disc 45, a lower connecting rod 46, a supporting frame 47, a microswitch 48, a lower one-way bearing 51, an upper one-way bearing 52, a gap 6, a mounting plate 711, a sliding rail 712, a pulley 713, a traction rope 714, a connecting seat 715, a sliding rod 716, a push plate 717, a guide post 718, an upper rotary disc 721, a deflector 722, a stop 731, a deflector pressure spring 732, an upper connecting rod 733, a light curtain pressure spring 741, a limiting block 742 and a hanging piece 8

Detailed Description

The present invention will be described in further detail below by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not intended to limit the present invention.

As shown in fig. 1, the installation schematic diagram of the door panel of the conventional car on the market is shown, a hanging plate guide rail 11 is arranged in the door head of the elevator, a left hanging plate 12 and a right hanging plate 13 are arranged in the hanging plate guide rail 11, a left door panel 2 and a right door panel 2 are arranged on the left hanging plate 12 and the right hanging plate 13, the left hanging plate 12 and the right hanging plate 13 realize reverse motion through the driving of a door machine arranged on the door head, the door opening and closing actions are realized, and a transmitting plate 31 and a receiving plate 32 of a light curtain are respectively fixed on the left door panel 2 and the right door panel 2.

Referring to fig. 2 to 6, the elevator door foreign object anti-pinch device of this embodiment includes a baffle 41 and a detection switch, the baffle 41 is rotatably installed on a door frame 40, the detection switch is fixed on the door frame and is triggered after the baffle 41 rotates, the detection switch is connected to a control system of the elevator, an elastic support 42 for propping against the baffle 41 is installed on the door frame, the detection switch employs a rotary encoder 43, the rotary encoder 43 is fixed on the door frame through a mounting bracket 44, one end of a central shaft of the rotary encoder 43 is connected to a lower rotary disc 45 through a lower one-way bearing 51, a central shaft of the rotary encoder 43 and the lower rotary disc 45 are respectively fixed to an inner ring and an outer ring of the lower one-way bearing 51, a support bracket 47 is fixed at a folding angle of the baffle 41, the support bracket 47 is hinged to one end of a lower connecting rod 46, and the other end of the lower connecting rod 46 is hinged to the lower rotary disc 45, the working direction of the lower one-way bearing 51 is matched with the direction of the rotational degree of freedom of the baffle plate 41, when the door panel 2 is opened, if a hand is clamped into the gap 6 (between the baffle plate 41 and the door panel 2, as shown in fig. 6), the baffle plate 41 is pushed and rotates relative to the door frame, the baffle plate 41 can drive the lower rotary plate 45 to rotate through the lower connecting rod 46, so that the lower rotary plate 45 can drive the rotary encoder 43 through the lower one-way bearing 51, the rotary encoder 43 generates a pulse signal, the pulse signal is sent to a control system (hereinafter referred to as a system) of the elevator, and the control system of the elevator controls the door motor system of the elevator to stop the door opening action. Adopt the advantage of above-mentioned structure to lie in: the baffle plate 41 rotates, and the lower rotary table 45 is driven to rotate by the lower connecting rod 46, so that the rotary encoder 43 generates a pulse signal, and due to the adoption of a four-connecting-rod type transmission principle, the rotating angular speed (shown as beta in fig. 6) of the lower rotary table 45 is greater than that (shown as alpha in fig. 6) of the baffle plate 41, the reaction speed of the rotary encoder 43 is amplified, in the door opening link of the elevator, the baffle plate 41 can quickly judge whether foreign matters (fingers, clothes and the like) are clamped into the gap 6 (the angle of the baffle plate 41 is positively correlated with the pulse number of the rotary encoder 43, and the waveform number sent by the rotary encoder 43 corresponding to the preset angle needs to be preset in the system) as long as the baffle plate 41 rotates by more than the preset angle; after rotary encoder 43 is triggered, baffle 41 can continue to rotate, and baffle 41 rotates the back, and the gap 6 width grow, has reduced and has pressed from both sides the tight condition more and take place, can improve gap 6 width through continuing to rotate baffle 41, pulls out the finger, conveniently rescues.

In this embodiment, a microswitch 48 of the lower link 46 for sensing is fixed to the mounting bracket 44. When the microswitch 48 is pressed by the lower link 46 in the initial state (at this time, the shutter 41 is not rotated), the energization is realized, and after the shutter 41 is rotated, the lower link 46 is disengaged from the microswitch 48, and the microswitch 48 is powered off. After the unexpected situation is relieved, the lower connecting rod 46 presses the microswitch 48 to realize electrification, the system judges that the baffle 41 is restored to the initial position, and the control system of the elevator controls the elevator to restore to work.

Referring to fig. 4, 7-10, in this embodiment, the emitter plate 31 and the receiver plate 32 of the elevator light curtain are respectively fixed to two mounting plates 711, the mounting plates 711 are vertically and slidably mounted on the door panel 2 through the sliding rails 712, a light curtain pressure spring 741 for pushing the mounting plates 711 downward is mounted on the door panel 2, a limiting block 742 for limiting is fixed on the door panel 2, the limiting block 742 abuts against the lower end of the mounting plate 711 in the initial state of the elevator light curtain (when the mounting plate 711 is not moved upward), the two mounting plates 711 are kept at the bottom of the whole stroke in the initial state under the action of the light curtain pressure spring 741, a pulley 713 is rotatably mounted on the door panel 2, the mounting plate 711 fixes one end of the traction rope 714, the traction rope 714 is wound on the pulley 713, a connecting seat 715 is fixed on the door panel 2, a sliding rod 716 is slidably mounted on the connecting seat 715, and the other end of the traction rope fixes one end of the sliding rod 716, a push plate 717 is fixed on the sliding rod 716, the central shaft penetrates through the rotary encoder 43, the other end of the central shaft is connected with an upper rotary disc 721 through an upper one-way bearing 52, the inner ring and the outer ring of the upper one-way bearing 52 are respectively fixed with the central shaft of the rotary encoder 43 and the upper rotary disc 721, a shift lever 722 is slidably mounted on the doorframe, a stopper 731 is fixed on the shift lever 722, a shift lever compression spring 732 for driving the shift lever 722 to return to an initial state is sleeved on the shift lever 722, the sum of the maximum working elasticity (namely, the elasticity of the shift lever compression spring 732 when the shift lever 722 is pressed to the stroke end by the push plate 717) of the shift lever 722 and the resistance of the upper connecting rod 733 on the shift lever 722 is smaller than the minimum working elasticity (namely, the elasticity of the light curtain compression spring 741 when the shift lever 722 is not in contact with the push plate 717), one end of the shift lever 722 and the upper rotary disc 721 are respectively hinged at two ends of the upper connecting rod 733, the working direction of the upper one-way bearing 52 is matched with the sliding direction of the shift lever 722. The driving lever 722 drives the upper rotating disc 721 to rotate through the upper connecting rod 733, so that the upper rotating disc 721 drives the rotary encoder 43 through the upper one-way bearing 52, and the rotary encoder 43 generates a pulse signal which is sent to a control system of the elevator.

During the closing of the door panel 2, the push plate 717 moves along with the door panel 2, the push plate 717 contacts the stopper 731, and pushes the stopper 731 inward, when the door panel 2 is to be completely closed (in the process that the distance between the left door panel 2 and the right door panel 2 is 2-3 cm), the stop block 731 is blocked by the connecting seat 715, the shift lever 722 stops moving, the push plate 717 cannot move along with the door panel 2, the door panel 2 continues to move, the emitting plate 31 and the receiving plate 32 of the elevator light curtain synchronously move upwards, and if a thin rope is positioned between the left door panel 2 and the right door panel 2, the infrared ray between the transmitting plate 31 and the receiving plate 32 is blocked, so that the control system immediately outputs a door opening signal, the left door panel 2 and the right door panel 2 stop closing and rotate reversely to open until the elevator door can be normally closed after the blocking object leaves the warning area, and the aim of safety protection is fulfilled, thereby avoiding the occurrence of accidents caused by people in the elevator.

Traditional fixed light curtain mounting structure, unable sensing size is less than the article such as string of light curtain precision, and the most common precision has 2.5mm, 5mm, 10mm, 20mm etc. on the market at present, and the precision improves a grade, and its price will improve several times, adopts above-mentioned structure, can realize improving the detection ability of light curtain greatly, reduces the too big problem of cost input that simply improves the light curtain precision and bring.

Because the synchronism (moving distance and corresponding position) of the push plate 717 on the left door panel 2 side and the push plate 717 on the right door panel 2 side directly influence the synchronism of the synchronous upward movement of the emitting plate 31 and the receiving plate 32 of the elevator light curtain, the central shaft of the rotary encoder 43 is driven by the driving lever 722, the upper connecting rod 733, the upper rotary disc 721 and the one-way bearing 5, if the synchronism of the central shaft rotating angles of the rotary encoder 43 on the left door panel 2 side and the right door panel 2 side is deviated, the system can rapidly judge the push plate 717 on the left door panel 2 side, which specific push plate 717 on the right door panel 2 side reaches the stop 731 first and contacts the stop 731, and the maintenance and adjustment by later-stage workers are facilitated.

According to the invention, by arranging the upper one-way bearing 5 and the lower one-way bearing 5 and utilizing the one-way characteristic of the one-way bearing 5, the arrangement of preventing hands from being clamped in the door opening state and the adjustment and detection of the light curtain in the door closing state can be realized only by arranging one rotary encoder 43. Specifically, the method comprises the following steps:

(1) baffle 41 resumes to the initial condition in-process, because the one-way characteristic of one-way bearing 5, down the reverse rotation of carousel 45, the one-way bearing 51 can not drive rotary encoder 43 down, and this in-process has utilized the one-way characteristic of one-way bearing 5, has avoided baffle 41 to resume to the initial condition in-process encoder production pulse signal send to the control system of elevator.

(2) In the process of opening the door, when the shift lever 722 is restored to the initial state, due to the unidirectional characteristic of the unidirectional bearing 5, the upper rotating disc 721 rotates reversely, the upper unidirectional bearing 52 does not drive the rotary encoder 43, and in the process, the unidirectional characteristic of the unidirectional bearing 5 is utilized, so that the encoder is prevented from generating pulse signals and sending the pulse signals to the control system of the elevator when the shift lever 722 is restored to the initial state.

In this embodiment, the door panel 2 is fixed on the hanging plate through the hanging member 8, and the pulley 713 is rotatably installed on the hanging member 8. A guide post 718 is fixed in the middle of the push plate 717, and the guide post 718 is horizontally slidably mounted on the door panel 2. The elastic support member 42 is a hydraulic stay bar, one end of the hydraulic stay bar is hinged to the door frame, and the other end of the hydraulic stay bar is hinged to the support frame 47. The lower rotary disk 45 and the upper rotary disk 721 are respectively located at the lower end and the upper end of the rotary encoder 43.

The above description of the present invention is intended to be illustrative. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The utility model provides a foreign matter device is prevented pressing from both sides by lift-cabin door, includes baffle and detection switch, the baffle rotates to be installed on the door frame, and detection switch is fixed in on the door frame and triggers after the baffle is rotatory, the control system of detection switch connection elevator, its characterized in that: install the elastic support piece who is used for withstanding the baffle on the door frame, detection switch adopts rotary encoder, rotary encoder is fixed in on the door frame through the installing support, rotary encoder's the one end of center pin is connected down the carousel through lower one-way bearing, and rotary encoder's center pin and lower carousel are fixed respectively to lower one-way bearing's inner circle and outer lane, the dog-ear department of baffle is fixed with the support frame, the one end of the articulated lower connecting rod of support frame, the articulated lower carousel of other end of lower connecting rod, the one-way bearing working direction cooperatees with the rotatory degree of freedom direction of baffle down.

2. The elevator door foreign matter clamping prevention device according to claim 1, wherein: and a microswitch of a lower connecting rod for sensing is fixed on the mounting bracket.

3. The elevator door foreign matter clamping prevention device according to claim 1, wherein: the transmitting plate and the receiving plate of the elevator light curtain are respectively fixed on two mounting plates, the mounting plates are vertically and slidably mounted on a door plate through sliding rails, a light curtain pressure spring for downwards propping against the mounting plates is mounted on the door plate, a limiting block for limiting is fixed on the door plate, a pulley is rotatably mounted on the door plate, one end of a traction rope is fixed on the mounting plates, the traction rope is wound on the pulley, a connecting seat is fixed on the door plate, a sliding rod is slidably mounted on the connecting seat, one end of the sliding rod is fixed at the other end of the traction rope, a push plate is fixed on the sliding rod, a central shaft penetrates through a rotary encoder, an upper rotating disc is connected at the other end of the central shaft through an upper one-way bearing, the central shaft and the upper rotating disc of the rotary encoder are respectively fixed on the inner ring and the outer ring of the upper one-way bearing, a shift lever is slidably mounted on a door frame, a stop block is fixed on the shift lever, and a shift lever is sleeved with a shift lever pressure spring for driving the shift lever to restore to the initial state, two ends of the upper connecting rod are respectively hinged with one end of the deflector rod and the upper rotating disc, and the working direction of the upper one-way bearing is matched with the sliding direction of the deflector rod.

4. The elevator door foreign matter clamping prevention device according to claim 1, wherein: the door plate is fixed on the hanging plate through a hanging piece, and the pulley is rotatably installed on the hanging piece.

5. The elevator door foreign matter clamping prevention device according to claim 1, wherein: and a guide column is fixed in the middle of the push plate and horizontally and slidably mounted on the door plate.

6. The elevator door foreign matter clamping prevention device according to claim 1, wherein: the elastic supporting piece adopts a hydraulic support rod, one end of the hydraulic support rod is hinged to the door frame, and the other end of the hydraulic support rod is hinged to the supporting frame.

7. The elevator door foreign matter clamping prevention device according to claim 1, wherein: the lower rotary table and the upper rotary table are respectively positioned at the lower end and the upper end of the rotary encoder.