CN208857415U - A kind of numerical control glass twisting machine - Google Patents
A kind of numerical control glass twisting machine Download PDFInfo
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- CN208857415U CN208857415U CN201821472977.3U CN201821472977U CN208857415U CN 208857415 U CN208857415 U CN 208857415U CN 201821472977 U CN201821472977 U CN 201821472977U CN 208857415 U CN208857415 U CN 208857415U
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- Prior art keywords
- tube
- motor
- precursor
- ingot
- numerical control
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- 239000011521 glass Substances 0.000 title claims abstract description 17
- 239000002243 precursor Substances 0.000 claims abstract description 64
- 230000005611 electricity Effects 0.000 claims description 20
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 11
- 230000006698 induction Effects 0.000 claims description 5
- 230000000694 effects Effects 0.000 claims description 3
- 238000004804 winding Methods 0.000 abstract description 9
- 238000000034 method Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 2
- 238000009941 weaving Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 10
- 238000005457 optimization Methods 0.000 description 9
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000005670 electromagnetic radiation Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Landscapes
- Spinning Or Twisting Of Yarns (AREA)
Abstract
The utility model discloses a kind of numerical control glass twisting machines, belong to weaving loom technical field.One motor of existing twisting machine drives several tube seats simultaneously, since precursor toughness is poor, is easy to be pulled off in winding process, after the precursor of a tube has broken, it is necessary to which pause operates, and restarts after connector, has length variation with other spools.And wire vent rate and winding rate are difficult to match, and influence yarn qualities.Respectively by independent motor control, precursor is broken rear joint and is restarted for each tube seat of the utility model and electric ingot, due to electric ingot controller independent control, does not influence length of twisting thread.Since motor is brshless DC motor, rate variance is small, so that the precursor wire vent rate on tube one and the wrapping wire rate of tube two match, and then can effectively avoid twist deviation, precursor yarn quality is good.
Description
Technical field
The utility model belongs to weaving loom technical field, in particulars relate to a kind of numerical control glass twisting machine.
Background technique
Twisting machine is the equipment by yarn is formed after two or more precursor twisting and together, generally includes: several
A tube seat and the electric ingot of tube seat equivalent amount, the motor one for driving several tube seats while rotation drive several electricity
The motor two that ingot rotates simultaneously.When work: the tube for winding precursor is placed on tube seat, and the end of precursor is entangled to corresponding electricity
In ingot tube, motor one drives all tube seat and tube to rotate by belt, while motor two drives institute by belt
The electric ingot rotation having forms yarn so that precursor is wrapped on the tube of electric ingot while twisting.
But one motor of above structure drives several tube seats simultaneously, since precursor toughness is poor, in winding process
It is easy to be pulled off, after the precursor of a tube has broken, it is necessary to which pause operates, and restarts after connector, has with other spools
Length variation.And the elasticity that precursor is wrapped in different tubes is different, and tube rotates a circle, and precursor wire vent length is different, because
When this all tube seat is rotated with a rate, when all electric ingots are rotated with the same rate, the few meeting of wire vent is broken, out
The meeting of filament length is fluffy, and the winding rate of the wire vent rate of tube seat and electric ingot is difficult to match, and influences yarn qualities.
Utility model content
In view of the drawbacks of the prior art, the purpose of this utility model is to provide each a kind of tube seat and electric ingots point
Not by different motor controls, precursor is broken rear joint and is restarted, and due to electric ingot controller independent control, does not influence length of twisting thread,
Wire vent rate and winding rate can be mutually matched simultaneously, the good numerical control glass twisting machine of yarn qualities.
To achieve the above object, a kind of the technical solution of the utility model are as follows: numerical control glass twisting machine, comprising: several
The electric ingot that tube seat and tube seat quantity match；Grafting is tied with the tube one of precursor on the tube seat, inserts on the electricity ingot
Connect tube two, twisting machine is equipped with and the second motor of the first motor of the identical quantity of tube seat, quantity identical as electricity ingot；One
The shaft of one motor and the end of a tube seat are affixed, and the shaft of second motor and the end of an electric ingot are affixed；Institute
It states and is equipped with guide part between tube seat and electric ingot；First motor drives the tube one for being tied with precursor to rotate by tube seat, so that
More precursor are produced and are guided on tube two through guide part, and the second motor winds more precursor by the dynamic tube two of electric spindle band and formed
Yarn.
Each tube seat of the utility model and electric ingot are respectively by independent motor control, since motor is brushless straight
Galvanic electricity machine, rate variance is small, so that the precursor wire vent rate on tube one and the wrapping wire rate of tube two match, and then can
The twist error of yarn is effectively ensured, precursor yarn quality is good.
As optimization technique measure, the tube seat is transversely arranged in a rack, and the electricity ingot is vertically arranged described
In rack；The guide part is located at below tube seat, above electric ingot.Tube seat and electric ingot are arranged anyhow, so that the utility model
It is compact-sized, it occupies little space, while tube seat lateral arrangement, so that the precursor arranged direction on tube one and wire vent direction phase
Vertically, it avoids the precursor being wrapped on tube one from falling off from tube one, influences normal wire vent.
As optimization technique measure, the rack two sides are simutaneously arranged several tube seats and electric ingot, in existing space
It is interior, effectively promote efficiency of twisting thread；The first motor, the second motor are brshless DC motor；Brshless DC motor is small in size, weight
Amount is light, and power output is big, and response is fast, and speed is high, and inertia is small, and rotation is smooth, and torque is stablized, and easily realizes intelligent, electronics commutation side
Formula is flexible, can be with sine wave commutation.Motor is non-maintaining, and efficiency is very high, and running temperature is low, electromagnetic radiation very little, and the long-life can be used
In various environment.The first motor is located at tube base rear end, horizontally disposed tube seat rotation is realized, without adding additional turn
It changes planes structure, compact-sized, practical, manufacture easy to produce.Second motor is located at below electric ingot, realizes the electric ingot being vertically arranged
Rotation, compact-sized, practical without adding extra conversion mechanism, manufacture easy to produce.
As optimization technique measure, the guide part is U-shaped cavity structure, and bottom of chamber connection one connects leading for precursor for wearing
Ring, the U-shaped cavity Standard one is for incuding the induction pieces whether precursor is pulled off.Since precursor is softer, quality is very light,
It is easy to even be blown the position for changing precursor by wind by external force, guide part is arranged close to electric ingot in the utility model, it can be ensured that
Precursor is introduced into electric ingot according to predeterminated position, avoids precursor by External force interference.Be arranged induction pieces can timely learning precursor whether
It is pulled off, and then after detecting that precursor is pulled off, user can suspend corresponding tube seat and electric ingot operating in time, described
Induction pieces are grating inductor or infrared inductor or laser inductor.
As optimization technique measure, the U-shaped cavity structure is spirally connected a rotor plate for having a flanging, the rotor plate and a base
Seat is rotatably connected；The pedestal is spirally connected on the rack.In order to effectively guide precursor, U-shaped cavity structure
It must be installed close to electric ingot, but tube two must be plugged on from top to down on electric ingot again, to avoid U-shaped cavity structure from influencing tube
Two installation, U-shaped cavity structure rotatably install on the base, when need on electric ingot grafting tube two or
When removing tube two, U-shaped cavity structure is rotated up, it is made to be become erectting arrangement from lateral arrangement, convenient for picking and placing tube two.
As optimization technique measure, the pedestal includes the connecting plate for being built up in two sides, the riser for being erected at rear end, described
Riser is located between two connecting plates,
The flanging pin joint of the connecting plate and rotor plate, the riser are connected by a spring with rotor plate；
Rotor plate, which rotates down, keeps its lower end surface and connecting plate upper surface inconsistent, limits the lower pan position of U-shaped cavity structure；
Rotor plate is rotated up, and in the pulling force effect of spring, is vertically positioned to U-shaped cavity structure.Pass through end face and spring
Realize that horizontal direction limit and vertical spacing, structure manufacture easy to produce, the manufacturing cost of guide part are low.
As optimization technique measure, the electricity ingot, which is worn, connects a guiding piece for guiding precursor to be wound into designated position, institute
The lantern ring that guiding piece is equipped with quantity identical as electric ingot is stated, the lantern ring diameter dimension is greater than the maximum position diameter ruler of tube two
It is very little.Guiding piece moves up and down, and limits to precursor winding position, so that yarn is wound according to predeterminated position, structure letter
It is single, practical.
As optimization technique measure, the electricity ingot includes connecing the spindle blade of tube two, positioned at spindle blade upper end for wearing
Spindle top, the lower spindle top positioned at spindle blade lower end, can the upper and lower ends to tube two position simultaneously, avoid electric ingot from shaking.
As optimization technique measure, the upper spindle top, lower spindle top outer ring surface open up several through-holes respectively, the through-hole is embedding
If the locator that can be stretched out and be retracted, the locator is located at the part in outer ring surface and connects a pressure spring, and the pressure spring pushes away
Dynamic locator protrudes from through-hole.Because on the one hand electric ingot will carry out effective position to tube two, on the other hand its structure will be convenient for
Tube two picks and places, therefore the locator of automatic telescopic is capable of in setting, realizes effective position of the tube two on electric ingot and is easy to
It picks and places, structure manufacture easy to produce.
As optimization technique measure, be equipped with control assembly in the lower section of tube seat, the control assembly include display screen, by
Key, indicator light.Display screen can show the working condition of twisting machine in time, understand relevant information convenient for user, key is convenient for use
Family carries out control operation according to on-site actual situations, and especially after precursor has broken, user can control phase by key in time
The first motor of pass and the second motor stop operating, and indicator light, which can pass through, to be issued red light and remind user's correlation dangerous situation.
Compared with prior art, the utility model has the following beneficial effects:
Each tube seat of the utility model and electric ingot are respectively by independent motor control, since motor is brushless straight
Galvanic electricity machine, rate variance is small, so that the precursor wire vent rate on tube one and the wrapping wire rate of tube two match, and then can
The twist error of yarn is effectively ensured, precursor yarn quality is good.
Detailed description of the invention
Fig. 1 is the utility model part-structure front view.
Fig. 2 is the utility model part-structure side view.
Fig. 3 is the utility model electricity ingot configuration diagram.
Fig. 4 is the configuration diagram of the utility model guide part two states.
Fig. 5 is the utility model guide part top view figure.
Description of symbols: 1, tube seat；2, electric ingot；3, first motor；4, the second motor；5, guide part；6, control group
Part；7, precursor；8, guiding piece；21, upper spindle top；22, lower spindle top；23, locator；24, pressure spring；51, U-shaped cavity structure；52, it leads
Ring；53, rotor plate；54, pedestal；55, spring.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain
The utility model is not used to limit the utility model.
On the contrary, the utility model cover it is any be defined by the claims do in the spirit and scope of the utility model
Substitution, modification, equivalent method and scheme.Further, right below in order to make the public have a better understanding the utility model
It is detailed to describe some specific detail sections in the datail description of the utility model.Do not have for a person skilled in the art
The utility model can also be understood completely in the description of these detail sections.
It should be noted that two elements can be directly connected to or there may also be residences when two element " affixed "
In element.On the contrary, intermediary element is not present when element is referred to as " directly existing " another element "upper".It is used herein
Term "horizontal", " vertical ", "upper", "lower" and similar statement are for illustrative purposes only.
As shown in Figs. 1-5, a kind of numerical control glass twisting machine, comprising: several tube seats 1 and 1 quantity of tube seat match
Electric ingot 2；Grafting is tied with the tube one of precursor 7 on the tube seat 1, grafting tube two on the electricity ingot 2, twisting machine be equipped with
Second motor 4 of the first motor 3 of the identical quantity of tube seat 1, quantity identical as electric ingot 2；The shaft of one first motor 3 and one
The end of a tube seat 1 is affixed, and the shaft of second motor 4 and the end of an electric ingot 2 are affixed；The tube seat 1 and electricity
Guide part 5 is equipped between ingot 2；First motor 3 drives the tube one for being tied with precursor 7 to rotate by tube seat 1, so that more precursor
7 produce and guide on tube two through guide part 5, and the second motor 4 passes through electric ingot 2 and tube two is driven to wind the more formation yarns of precursor 7
Line.
Each tube seat 1 of the utility model and electric ingot 2 respectively by different motor controls, precursor 7 break after not
It needs to suspend whole equipment, does not influence efficiency of twisting thread, the speed of rotation of each tube seat 1 and electric ingot 2 can be adjusted individually, be made
The wrapping wire rate for obtaining 7 wire vent rate of precursor and tube two on tube one matches, and then can effectively avoid precursor 7 from being pulled off
Or winding is fluffy, it is ensured that wrapping wire is close, and 7 yarn quality of precursor is good.
It is equipped with control assembly 6 in the lower section of tube seat 1, the control assembly 6 includes display screen, key, indicator light.Display
Screen can show the working condition of twisting machine in time, understand relevant information convenient for user, key is convenient for user according to live practical
Situation carries out control operation, and especially after precursor 7 has broken, user can control relevant first motor 3 by key in time
With stopping operating for the second motor 4, indicator light can remind user's correlation dangerous situation by issuing red light.
The tube seat 1 is transversely arranged in a rack, and the electricity ingot 2 is vertically arranged in the rack；The guiding
Part 5 is located at 1 lower section of tube seat, electric 2 top of ingot.Tube seat 1 and electric ingot 2 are arranged anyhow, so that the utility model is compact-sized, are accounted for
It is small with space, while 1 lateral arrangement of tube seat avoids so that 7 arranged direction of precursor and wire vent direction on tube one are perpendicular
The precursor 7 being wrapped on tube one falls off from tube one, influences normal wire vent.
The rack two sides are simutaneously arranged several tube seats 1 and electric ingot 2 is effectively promoted and twisted thread in existing space
Efficiency.The first motor 3, the second motor 4 are brshless DC motor；Brshless DC motor is small in size, light-weight, and power output is big,
Response is fast, and speed is high, and inertia is small, rotates smoothly, and torque is stablized, and easily realizes intelligence, electronics commutation mode is flexible, Ke Yizheng
String wave commutation.Motor is non-maintaining, and efficiency is very high, and running temperature is low, electromagnetic radiation very little, and the long-life can be used for various environment.Institute
It states first motor 3 and is located at 1 rear end of tube seat, realize that horizontally disposed tube seat 1 rotates, without adding extra conversion mechanism, tie
Structure is compact, practical, manufacture easy to produce.Second motor 4 is located at electric 2 lower section of ingot, realizes that the electric ingot 2 being vertically arranged rotates,
It is compact-sized, practical without adding extra conversion mechanism, manufacture easy to produce.
As shown in Figure 4, Figure 5, a kind of specific embodiment of the utility model guide part 5:
The guide part 5 is U-shaped cavity structure 51, and bottom of chamber connection one is for wearing the lead ring 52 for connecing precursor, the U-shaped cavity
The assembly of structure 51 one is for incuding the induction pieces whether precursor is pulled off.Since precursor 7 is softer, quality is very light, it is easy to quilt
External force is even blown the position for changing precursor 7 by wind, and guide part 5 is arranged close to electric ingot 2 in the utility model, it can be ensured that precursor 7
It is introduced into electric ingot 2 according to predeterminated position, avoids precursor 7 by External force interference.
The U-shaped cavity structure 51 is spirally connected a rotor plate 53 for having a flanging, and the rotor plate 53 and a pedestal 54 are with can
The mode of rotation is connected；The pedestal is spirally connected on the rack.In order to effectively guide precursor 7, U-shaped cavity structure 51 is necessary
It is installed close to electric ingot 2, but tube two must be plugged on electric ingot 2 from top to down again, to avoid U-shaped cavity structure 51 from influencing yarn
The installation of cylinder two, U-shaped cavity structure 51 is rotatably mounted on pedestal 54, when needing the grafting yarn on electric ingot 2
Cylinder two or when removing tube two, U-shaped cavity structure 51 is rotated up, and makes it be become erectting arrangement from lateral arrangement, convenient for picking and placing
Tube two.
The pedestal 54 includes the connecting plate for being built up in two sides, the riser for being erected at rear end, and the riser is located at two companies
Between fishplate bar, the flanging pin joint of the connecting plate and rotor plate 53, the riser is connected by a spring 55 with rotor plate 53；
Rotor plate 53, which rotates down, keeps its lower end surface and connecting plate upper surface inconsistent, limits the lower pan position of U-shaped cavity structure 51；Turn
Movable plate 53 is rotated up, and in the pulling force effect of spring 55, is vertically positioned to U-shaped cavity structure 51.It is real by end face and spring 55
The horizontal direction limit of existing guide part 5 and vertical spacing, structure manufacture easy to produce, manufacturing cost are low.
A kind of specific embodiment of the utility model guiding piece 8: the electricity ingot 2, which is worn, connects one for guiding precursor 7 to be wound into
The guiding piece 8 of designated position, the guiding piece 8 are equipped with the lantern ring of quantity identical as electric ingot 2, and the lantern ring diameter dimension is greater than yarn
The maximum position diameter dimension of cylinder two.Guiding piece 8 moves up and down, and limits to 7 winding position of precursor, so that yarn is according to pre-
If position is wound, structure is simple, practical.
A kind of specific embodiment of the utility model electricity ingot 2: the electricity ingot 2 includes for wearing the spindle blade for connecing tube two, position
Upper spindle top 21 in spindle blade upper end, the lower spindle top 22 positioned at spindle blade lower end, can upper and lower ends to tube two it is fixed simultaneously
Position, avoids electric ingot 2 from shaking, referring to Fig. 3.
The upper spindle top 21, lower spindle top 22 outer ring surface open up several through-holes respectively, the through-hole be embedded can stretch out with
And the locator 23 of retraction, the locator 23 are located at the part in outer ring surface and connect a pressure spring 24, the pressure spring 24 pushes fixed
Position device 23 protrudes from through-hole.Since electric 2 one side of ingot will carry out effective position to tube two, on the other hand its structure will be convenient for yarn
Cylinder two picks and places, therefore the locator 23 of automatic telescopic is capable of in setting, realizes effective position of the tube two on electric ingot 2 and is easy to
It picks and places, structure manufacture easy to produce.
In the application, fixed connection mode can be to be spirally connected or weld or rivet or grafting or connected by third component
It connects, those skilled in the art can select according to the actual situation.
The utility model embodiment is explained in detail above in conjunction with attached drawing, but the utility model is not limited to
Embodiment is stated, to those skilled in the art, can also be made under the premise of not departing from the utility model several
Variations and modifications, these also should be regarded as belonging to the protection scope of the utility model.
Claims (10)
1. a kind of numerical control glass twisting machine, comprising: the electric ingot (2) that several tube seats (1) and tube seat (1) quantity match；
Grafting is tied with the tube one of precursor (7), grafting tube two on the electricity ingot (2), which is characterized in that twist on the tube seat (1)
Line machine is equipped with the second motor (4) of the first motor (3) of quantity identical as tube seat (1), quantity identical as electric ingot (2)；One
The shaft of first motor (3) and the end of a tube seat (1) are affixed, the shaft of second motor (4) and an electric ingot (2)
End it is affixed；Guide part (5) are equipped between the tube seat (1) and electric ingot (2)；First motor (3) passes through tube seat (1) band
The dynamic tube one for being tied with precursor (7) rotates, so that more precursor (7) are produced and guided on tube two through guide part (5), the second motor
(4) it drives tube two to wind more precursor (7) by electric ingot (2) and forms yarn.
2. a kind of numerical control glass twisting machine as described in claim 1, which is characterized in that the tube seat (1) is transversely arranged on
In one rack, the electricity ingot (2) is vertically arranged in the rack；The guide part (5) is located at below tube seat (1), electric ingot
(2) top.
3. a kind of numerical control glass twisting machine as claimed in claim 2, which is characterized in that the rack two sides are simutaneously arranged several
Tube seat (1) and electric ingot (2)；The first motor (3), the second motor (4) are brushless servo motor；The first motor
(3) it is located at tube seat (1) rear end, second motor (4) is located at below electric ingot (2).
4. a kind of numerical control glass twisting machine as described in claim 1, which is characterized in that the guide part (5) is U-shaped cavity structure
(51), bottom of chamber connection one is used to incude precursor for wearing the lead ring (52) for connecing precursor, U-shaped cavity structure (51) assembly one
The induction pieces whether being pulled off.
5. a kind of numerical control glass twisting machine as claimed in claim 4, which is characterized in that the U-shaped cavity structure (51) is spirally connected one
Rotor plate (53) with flanging, the rotor plate (53) are rotatably connected with a pedestal (54)；The base
Seat is spirally connected on the rack.
6. a kind of numerical control glass twisting machine as claimed in claim 5, which is characterized in that the pedestal (54) includes being built up in two
The connecting plate of side, the riser for being erected at rear end, the riser are located between two connecting plates, the connecting plate and rotor plate (53)
Flanging pin joint, the riser is connected by a spring (55) with rotor plate (53)；Rotor plate (53), which rotates down, to be made under it
End face and connecting plate upper surface are inconsistent, limit the lower pan position of U-shaped cavity structure (51)；Rotor plate (53) is rotated up, in bullet
The pulling force effect of spring (55) vertically positions U-shaped cavity structure (51).
7. a kind of numerical control glass twisting machine as claimed in any one of claims 1 to 6, which is characterized in that the electricity ingot (2), which is worn, to be connect
One for guiding precursor (7) to be wound into the guiding piece (8) of designated position, and the guiding piece (8) is equipped with quantity identical as electric ingot (2)
Lantern ring, the lantern ring diameter dimension be greater than tube two maximum position diameter dimension.
8. a kind of numerical control glass twisting machine as claimed in claim 7, which is characterized in that the electricity ingot (2) includes connecing for wearing
The spindle blade of tube two, the upper spindle top (21) positioned at spindle blade upper end, the lower spindle top (22) positioned at spindle blade lower end.
9. a kind of numerical control glass twisting machine as claimed in claim 8, which is characterized in that the upper spindle top (21), lower spindle top
(22) outer ring surface opens up several through-holes respectively, and the through-hole is embedded the locator (23) that can be stretched out and be retracted, described fixed
Position device (23) is located at the connection of the part in outer ring surface one pressure spring (24), and it is logical that the pressure spring (24) pushes locator (23) to protrude from
Hole.
10. a kind of numerical control glass twisting machine as claimed in claim 9, which is characterized in that be equipped with control in the lower section of tube seat (1)
Component (6) processed, the control assembly (6) includes display screen, key, indicator light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821472977.3U CN208857415U (en) | 2018-09-10 | 2018-09-10 | A kind of numerical control glass twisting machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821472977.3U CN208857415U (en) | 2018-09-10 | 2018-09-10 | A kind of numerical control glass twisting machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208857415U true CN208857415U (en) | 2019-05-14 |
Family
ID=66417327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821472977.3U Expired - Fee Related CN208857415U (en) | 2018-09-10 | 2018-09-10 | A kind of numerical control glass twisting machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208857415U (en) |
-
2018
- 2018-09-10 CN CN201821472977.3U patent/CN208857415U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20190514 |