CN112408278A - Emergency braking safety protection device for elevator - Google Patents
Emergency braking safety protection device for elevator Download PDFInfo
- Publication number
- CN112408278A CN112408278A CN202011266273.2A CN202011266273A CN112408278A CN 112408278 A CN112408278 A CN 112408278A CN 202011266273 A CN202011266273 A CN 202011266273A CN 112408278 A CN112408278 A CN 112408278A
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- CN
- China
- Prior art keywords
- fixedly connected
- rods
- pins
- lifting platform
- sliding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F11/00—Lifting devices specially adapted for particular uses not otherwise provided for
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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
- B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
- B66B5/12—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions in case of rope or cable slack
-
- 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
- B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
- B66B5/16—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well
- B66B5/18—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well and applying frictional retarding forces
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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
- B66B5/282—Structure thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B7/00—Other common features of elevators
- B66B7/12—Checking, lubricating, or cleaning means for ropes, cables or guides
- B66B7/1253—Lubricating means
- B66B7/1269—Lubricating means specially adapted for guides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F17/00—Safety devices, e.g. for limiting or indicating lifting force
- B66F17/006—Safety devices, e.g. for limiting or indicating lifting force for working platforms
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N11/00—Arrangements for supplying grease from a stationary reservoir or the equivalent in or on the machine or member to be lubricated; Grease cups
- F16N11/08—Arrangements for supplying grease from a stationary reservoir or the equivalent in or on the machine or member to be lubricated; Grease cups with mechanical drive, other than directly by springs or weights
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Structural Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cage And Drive Apparatuses For Elevators (AREA)
Abstract
The invention discloses an emergency braking safety protection device for an elevator, which comprises a box body, wherein a control cavity is arranged in the box body, the emergency braking safety protection device realizes the required control of the device through bevel gear transmission according to related knowledge of mechanical transmission, the rotating speed of an output shaft in a load state and a non-load state is different through the rotation of a motor, so that a speed control gear beside the motor is clamped under the condition of larger centrifugal force and further rotates, a buffer column is upwards lifted to drag a lifting platform sliding from the upper side through gear and rack meshing transmission, the pulling force between a steel cable and the lifting platform is almost eliminated when a fault occurs, and the lifting platform and the lifting column are clamped tightly under the action of the spring elasticity to enable the lifting platform to slow down and fall.
Description
Technical Field
The invention relates to the field of lifting devices, in particular to an emergency braking safety protection device for a lifter.
Background
Construction elevators are generally referred to as construction elevators, but construction elevators comprise a broader definition and construction platforms also belong to the construction elevator series. Traditional elevating gear does not all adopt better safety arrangement, when emergency appears, the dangerous condition that the lift platform descends rapidly appears very easily, often these elevating gear are all higher moreover, and it is very difficult to fill emollient, and the device does not fill emollient and also can increase the risk that the device breaks down.
The present invention sets forth a device that solves the above problems.
Disclosure of Invention
The technical problem is as follows:
most protection devices of the traditional lifting device are not ideal, when an emergency occurs again, the rapid descending of the lifting platform is easy to occur, a better safety protection device is urgently needed to be adopted, the phenomenon of great loss of lives and properties is prevented, the lifting device is extremely difficult when the device is filled with lubricant, and the situation that the device is stuck or seriously abraded easily occurs when the device cannot be filled with the lubricant in time.
In order to solve the problems, the embodiment designs an elevator emergency braking safety protection device, which comprises a base, wherein a control cavity is arranged in a box body, a power transmission device for lifting the device is arranged in the control cavity, a control device for taking emergency braking and automatically filling the device with lubricant when the device is in emergency is arranged in the control cavity, the control device comprises four support columns which are fixedly connected with the box body and distributed around, a lifting platform is connected on the support columns in a sliding manner, a first pin is connected on the lifting platform in a rotating manner, a brake rod is connected on the first pin in a rotating manner, the brake rod is fixedly connected with the lifting platform through a tightening spring, a second pin is connected on the brake rod in a rotating manner, and a pull rod is connected on the second pin in a rotating manner, the lifting platform is fixedly connected with two C-shaped rods which are positioned on the lubricating box and are bilaterally symmetrical, the C-shaped rod is rotatably connected with a third pin which is rotatably connected with a first rod, the first rod is rotatably connected with a fourth pin, the fourth pin is rotatably connected with a second rod, the second rod is rotatably connected with a fifth pin, the brake rod is provided with a chute, the chute is rotatably connected with a sliding pin, the sliding pin is rotatably connected with a sliding transfer rod, the sliding transfer rod is rotatably connected with a fifth pin, and the fifth pin is rotatably connected with the second rod, the fifth round pin with C shape pole sliding connection, through the lubricated case is kept away from to the rotation pulling slip dowel bar of brake lever and then makes second pole and the rotation of first pole seal the delivery pipe, be equipped with the power chamber in the box, be equipped with the power device that provides driving power for the device in the power chamber, power chamber upside is equipped with and is used for preventing the buffer that emergency protection appears in the device.
The transmission device comprises two first shafts which are rotationally connected with the inner wall of the control cavity and are positioned in bilateral symmetry of the lubricating box, first bevel teeth are fixedly connected to the first shafts, belt pulleys are fixedly connected to the first shafts, steel cables are fixedly connected to the belt pulleys, the steel cables are fixedly connected with the clip buckles, second shafts are rotationally connected to the box body, second bevel teeth are fixedly connected to the second shafts, and the second bevel teeth are meshed with the first bevel teeth.
The power device comprises a third bevel gear fixedly connected to the second shaft and located in the power cavity, a main shaft is connected to the inner wall of the power cavity in a rotating mode, a fourth bevel gear fixedly connected to the main shaft and meshed with the third bevel gear, an inner shaft is fixedly connected to the main shaft, five inner shaft clamping grooves are formed in the inner shaft and located in central symmetry of the main shaft, clamping pins are connected to the inner shaft clamping grooves in a sliding mode, clamping pin springs are fixed between the clamping pins and the inner shaft, an outer shaft is connected to the inner shaft in a sliding mode, five clamping grooves are formed in the outer shaft and located in central symmetry of the main shaft, a main motor is fixedly connected to the inner wall of the power cavity and connected with the main shaft in a rotating mode, and rotation of the outer shaft is achieved through rotation speed of the main shaft.
Wherein, buffer include with box fixed connection's first bayonet lock groove pole, sliding connection is located on the box two of main motor bilateral symmetry support the buffer beam, fixedly connected with buffering rubber on the support buffer beam, fixedly connected with buffer block on the buffering rubber, be equipped with the second groove on the support buffer beam, sliding connection has the location bayonet lock on the second groove, the location bayonet lock with support fixedly connected with reset spring between the buffer beam, the location bayonet lock can with first bayonet lock groove pole contact is connected, support the buffer beam with outer shaft engagement is connected.
The invention has the beneficial effects that: according to the invention, the required control of the device is realized through bevel gear transmission according to the related knowledge of mechanical transmission, the rotating speed of the output shaft is different between a load state and a non-load state through the rotation of the motor, so that a speed control gear beside the motor is clamped under the condition of larger centrifugal force and further rotates, the buffer column is upwards lifted to drag the lifting platform sliding from the upper side through the meshing transmission of the gear and the rack, and the tension between the steel cable and the lifting platform is almost disappeared when a fault occurs, so that the lifting platform and the lifting column are clamped tightly under the action of the elastic force of the spring to enable the lifting platform and the lifting column to descend at a reduced speed.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
The invention is further illustrated with reference to the following figures and examples.
Fig. 1 is a schematic view of the overall structure of an emergency braking safety protection device for an elevator according to the present invention;
FIG. 2 is a schematic view of the structure of FIG. 1 in the direction "A-A";
fig. 3 is a schematic view of the structure in the direction "B-B" of fig. 1.
Detailed Description
The invention will now be described in detail with reference to fig. 1-3, wherein for ease of description the orientations described hereinafter are now defined as follows: the up, down, left, right, and front-back directions described below correspond to the up, down, left, right, and front-back directions in the projection relationship of fig. 1 itself.
The invention relates to an emergency braking safety protection device for an elevator, which is mainly applied to the safety protection process of the elevator, and the invention is further explained by combining the attached drawings of the invention:
the invention relates to an emergency braking safety protection device for an elevator, which comprises a box body 11, wherein a control cavity 12 is arranged in the box body 11, a power transmission device 901 for transmitting power for lifting the device is arranged in the control cavity 12, a control device 904 for adopting emergency braking and automatically filling lubricant for the device when the device has an emergency situation is arranged in the control cavity 12, the control device 904 comprises four support columns 25 which are fixedly connected with the box body 11 and distributed on the front, the back, the left and the right, a lifting platform 49 is connected on the support columns 25 in a sliding way, a first pin 29 is connected on the lifting platform 49 in a rotating way, a brake rod 27 is connected on the first pin 29 in a rotating way, the brake rod 27 is fixedly connected with the lifting platform 49 through a tightening spring 28, a second pin 30 is connected on the brake rod 27 in a rotating way, a pull rod 31 is connected on the second pin 30 in a rotating way, fixedly connected with returns shape on the pull rod 31 and detains 32, fixedly connected with stops piece 48 on the brake lever 27, stop piece 48 with the pillar 25 contact is connected, fixedly connected with lubricated case 50 on the lift platform 49, two conveyer pipes 51 of fixedly connected with bilateral symmetry on the lubricated case 50, fixedly connected with shower nozzle 55 on the conveyer pipe 51, fixedly connected with is located on the lift platform 49 two C shape poles 52 of lubricated case 50 bilateral symmetry, the swivelling joint has third round pin 56 on the C shape pole 52, the swivelling joint has first pole 59 on the third round pin 56, the swivelling joint has fourth round pin 57 on the first pole 59, the swivelling joint has second pole 58 on the fourth round pin 57, the swivelling joint has fifth round pin 53 on the second pole 58, be equipped with spout 60 on the brake lever 27, the swivelling joint has sliding pin 61 on the spout 60, the swivelling joint has sliding transfer pole 54 on the sliding pin 61, the sliding transfer rod 54 is rotatably connected with a fifth pin 53, the fifth pin 53 is rotatably connected with the second rod 58, the fifth pin 53 is slidably connected with the C-shaped rod 52, the sliding transfer rod 54 is pulled to be away from the lubricating box 50 through rotation of the brake rod 27, the second rod 58 and the first rod 59 are rotated to seal the conveying pipe 51, a power cavity 21 is formed in the box body 11, a power device 902 for providing motive power for the device is arranged in the power cavity 21, and a buffer device 903 for preventing emergency protection of the device is arranged on the upper side of the power cavity 21.
According to an embodiment, the transmission device 901 is described in detail below, the transmission device 901 comprises two first shafts 47 which are rotatably connected with the inner wall of the control chamber 12 and are positioned in bilateral symmetry of the lubrication tank 50, a first conical tooth 14 is fixedly connected to the first shafts 47, pulleys 15 are fixedly connected to the first shafts 47, cables 33 are fixedly connected to the pulleys 15, the cables 33 are fixedly connected to the clip 32, a second shaft 17 is rotatably connected to the box 11, a second conical tooth 16 is fixedly connected to the second shaft 17, and the second conical tooth 16 is in meshed connection with the first conical tooth 14.
According to the embodiment, the power device 902 is described in detail below, the power device 902 includes a third bevel gear 19 fixedly connected to the second shaft 17 and located in the power cavity 21, a main shaft 20 rotatably connected to an inner wall of the power cavity 21, a fourth bevel gear 18 fixedly connected to the main shaft 20, the fourth bevel gear 18 engaged with the third bevel gear 19, an inner shaft 43 fixedly connected to the main shaft 20, five inner shaft slots 42 centrally symmetric to the main shaft 20 and located in the inner shaft 43, a latch 39 slidably connected to the inner shaft slots 42, a latch spring 41 fixed between the latch 39 and the inner shaft 43, an outer shaft 44 slidably connected to the inner shaft 43, five slots 40 centrally symmetric to the main shaft 20 and located on the outer shaft 44, a main motor 45 fixedly connected to an inner wall of the power cavity 21, and the main motor 45 rotatably connected to the main shaft 20, the rotation of the outer shaft 44 is achieved by the speed of rotation of the main shaft 20.
According to an embodiment, the following detailed description is provided for the buffering device 903, the buffering device 903 includes a first pin slot 46 fixedly connected to the box 11, the box 11 is slidably connected to two supporting buffer rods 22 located in bilateral symmetry of the main motor 45, the supporting buffer rods 22 are fixedly connected to the buffering rubber 23, the buffering rubber 23 is fixedly connected to the buffering rubber 24, the supporting buffer rods 22 are provided with second slots 37, the second slots 37 are slidably connected to the positioning pins 34, the positioning pins 34 are fixedly connected to the supporting buffer rods 22 through return springs 36, the positioning pins 34 can be in contact connection with the first pin slot 46, and the supporting buffer rods 22 are in engagement connection with the outer shaft 44.
The use steps herein are described in detail below with reference to fig. 1-3:
initially, the garter spring 28 is in a compressed state.
When the emergency situation such as large breakage of the steel cable 33 occurs, the pull rod 31 is pulled through the clip 32 to fluctuate the rotation of the brake lever 27, so that the brake lever 27 tightens the brake disc 48 and the pillar 25 under the thrust of the tightening spring 28, thereby preventing the lifting platform 49 from sliding downwards in an accelerating way, on the other hand, when the steel cable 33 is pulled by the belt wheel 15, the brake lever 27 is pulled through the clip 32 to rotate, and the brake lever 27 again pulls the sliding transmission rod 54 to move, so that the second rod 58 and the first rod 59 rotate to open the delivery pipe 51, the lubricating liquid in the lubricating box 50 flows into the connecting part of the strut 25 and the lifting platform 49, on the contrary, when the steel cable 33 is broken or descends in an accelerating way, the conveying pipe 51 is closed by preventing the sliding transfer rod 54 from moving due to the elastic action of the tightening spring 28, the lubricating liquid in the lubricating box 50 is prevented from flowing out, and when the steel cable 33 is broken, the main motor 45 does not rotate under the load, so that the rotating speed is suddenly increased, the clamping pin 39 is clamped with the clamping groove 40 under the action of centrifugal force, the outer shaft 44 is driven to rotate, and the supporting buffer rod 22 moves upwards to ensure that the buffer block 24 buffers the lifting platform 49.
The invention has the beneficial effects that: according to the invention, the required control of the device is realized through bevel gear transmission according to the related knowledge of mechanical transmission, the rotating speed of the output shaft is different between a load state and a non-load state through the rotation of the motor, so that a speed control gear beside the motor is clamped under the condition of larger centrifugal force and further rotates, the buffer column is upwards lifted to drag the lifting platform sliding from the upper side through the meshing transmission of the gear and the rack, and the tension between the steel cable and the lifting platform is almost disappeared when a fault occurs, so that the lifting platform and the lifting column are clamped tightly under the action of the elastic force of the spring to enable the lifting platform and the lifting column to descend at a reduced speed.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (4)
1. The utility model provides an elevator emergency braking safety arrangement, includes the box, its characterized in that: the device is characterized in that a control cavity is arranged in the box body, a power transmission device for lifting the device is arranged in the control cavity, a control device for taking emergency braking and automatically filling the device with lubricant is arranged in the control cavity when the device is in emergency, the control device comprises four supporting columns which are fixedly connected with the box body and distributed all around, a lifting platform is connected on the supporting columns in a sliding manner, a first pin is connected on the lifting platform in a rotating manner, a brake rod is connected on the first pin in a rotating manner, the brake rod is fixedly connected with the lifting platform through a tightening spring, a second pin is connected on the brake rod in a rotating manner, a pull rod is connected on the second pin in a rotating manner, a clip is fixedly connected on the pull rod, a brake sheet is fixedly connected on the brake rod and is in contact connection with the supporting columns, and a lubricating box is fixedly connected on the lifting platform, the lubricating box is fixedly connected with two conveying pipes which are bilaterally symmetrical, the conveying pipes are fixedly connected with spray heads, the lifting platform is fixedly connected with two C-shaped rods which are bilaterally symmetrical, the C-shaped rods are rotatably connected with third pins, the third pins are rotatably connected with first rods, the first rods are rotatably connected with fourth pins, the fourth pins are rotatably connected with second rods, the second rods are rotatably connected with fifth pins, the braking rods are provided with sliding grooves, the sliding grooves are slidably connected with sliding pins, the sliding pins are rotatably connected with sliding transfer rods, the sliding transfer rods are rotatably connected with fifth pins, the fifth pins are rotatably connected with the second rods, the fifth pins are slidably connected with the C-shaped rods, the sliding transfer rods are pulled to be far away from the lubricating box through the rotation of the braking rods, so that the second rods and the first rods rotate to seal the conveying pipes, the power cavity is arranged in the box body, a power device for providing motive power for the device is arranged in the power cavity, and a buffer device used for preventing emergency protection from occurring on the device is arranged on the upper side of the power cavity.
2. An elevator emergency brake safety protection device according to claim 1, wherein: the transmission device comprises two first shafts which are rotationally connected with the inner wall of the control cavity and are positioned in bilateral symmetry of the lubricating box, first conical teeth are fixedly connected to the first shafts, belt pulleys are fixedly connected to the first shafts, steel cables are fixedly connected to the belt pulleys, the steel cables are fixedly connected to the clip buckles, second shafts are rotationally connected to the box body, second conical teeth are fixedly connected to the second shafts, and the second conical teeth are meshed with the first conical teeth.
3. An elevator emergency brake safety protection device according to claim 1, wherein: the power device comprises a third bevel gear fixedly connected to the second shaft and located in the power cavity, a main shaft is rotatably connected to the inner wall of the power cavity, a fourth bevel gear fixedly connected to the main shaft and engaged with the third bevel gear, an inner shaft is fixedly connected to the main shaft, five inner shaft clamping grooves are formed in the inner shaft and located in central symmetry of the main shaft, clamping pins are slidably connected to the inner shaft clamping grooves, clamping pin springs are fixed between the clamping pins and the inner shaft, an outer shaft is slidably connected to the inner shaft, five clamping grooves are formed in the outer shaft and located in central symmetry of the main shaft, a main motor is fixedly connected to the inner wall of the power cavity and rotatably connected with the main shaft, and rotation of the outer shaft is driven by the rotation speed of the main shaft.
4. An elevator emergency brake safety protection device according to claim 1, wherein: buffer include with box fixed connection's first bayonet lock groove pole, sliding connection has and is located on the box two of main motor bilateral symmetry support the buffer beam, fixedly connected with buffering rubber on the support buffer beam, fixedly connected with buffer block on the buffering rubber, be equipped with the second groove on the support buffer beam, sliding connection has the location bayonet lock on the second groove, the location bayonet lock with support fixedly connected with reset spring between the buffer beam, the location bayonet lock can with first bayonet lock groove pole contact is connected, support the buffer beam with outer shaft toothing is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011266273.2A CN112408278A (en) | 2020-11-13 | 2020-11-13 | Emergency braking safety protection device for elevator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011266273.2A CN112408278A (en) | 2020-11-13 | 2020-11-13 | Emergency braking safety protection device for elevator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112408278A true CN112408278A (en) | 2021-02-26 |
Family
ID=74831202
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011266273.2A Withdrawn CN112408278A (en) | 2020-11-13 | 2020-11-13 | Emergency braking safety protection device for elevator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112408278A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113042295A (en) * | 2021-03-18 | 2021-06-29 | 赵青梅 | Water conservancy is touch-up paint equipment under water |
| CN114992222A (en) * | 2022-07-11 | 2022-09-02 | 常德苏通力原工程机械有限公司 | Novel self-resetting falling protector friction block shaft and manufacturing method thereof |
-
2020
- 2020-11-13 CN CN202011266273.2A patent/CN112408278A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113042295A (en) * | 2021-03-18 | 2021-06-29 | 赵青梅 | Water conservancy is touch-up paint equipment under water |
| CN114992222A (en) * | 2022-07-11 | 2022-09-02 | 常德苏通力原工程机械有限公司 | Novel self-resetting falling protector friction block shaft and manufacturing method thereof |
| CN114992222B (en) * | 2022-07-11 | 2024-03-01 | 常德苏通力原工程机械有限公司 | Self-resetting anti-falling device friction block shaft and manufacturing method |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20210226 |
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| WW01 | Invention patent application withdrawn after publication |