CN112719366A - Feeding mechanism for elevator guide rail perforating device - Google Patents

Feeding mechanism for elevator guide rail perforating device Download PDF

Info

Publication number
CN112719366A
CN112719366A CN202011507069.5A CN202011507069A CN112719366A CN 112719366 A CN112719366 A CN 112719366A CN 202011507069 A CN202011507069 A CN 202011507069A CN 112719366 A CN112719366 A CN 112719366A
Authority
CN
China
Prior art keywords
guide rail
elevator guide
feeding mechanism
plate
conveying roller
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Withdrawn
Application number
CN202011507069.5A
Other languages
Chinese (zh)
Inventor
方冬荣
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to CN202011507069.5A priority Critical patent/CN112719366A/en
Publication of CN112719366A publication Critical patent/CN112719366A/en
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23BTURNING; BORING
    • B23B47/00Constructional features of components specially designed for boring or drilling machines; Accessories therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q7/00Arrangements for handling work specially combined with or arranged in, or specially adapted for use in connection with, machine tools, e.g. for conveying, loading, positioning, discharging, sorting
    • B23Q7/05Arrangements for handling work specially combined with or arranged in, or specially adapted for use in connection with, machine tools, e.g. for conveying, loading, positioning, discharging, sorting by means of roller-ways
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q7/00Arrangements for handling work specially combined with or arranged in, or specially adapted for use in connection with, machine tools, e.g. for conveying, loading, positioning, discharging, sorting
    • B23Q7/05Arrangements for handling work specially combined with or arranged in, or specially adapted for use in connection with, machine tools, e.g. for conveying, loading, positioning, discharging, sorting by means of roller-ways
    • B23Q7/055Arrangements for handling work specially combined with or arranged in, or specially adapted for use in connection with, machine tools, e.g. for conveying, loading, positioning, discharging, sorting by means of roller-ways some of the rollers being driven

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lift-Guide Devices, And Elevator Ropes And Cables (AREA)

Abstract

The invention discloses a feeding mechanism for an elevator guide rail punching device, and relates to the technical field of elevator guide rail production material conveying. Compared with the prior art, the invention has the beneficial effects that: leave the reservation clearance through between the conveying roller of both sides for the guide rail is placed downwards when carrying, and the steel sheet plane that punches openly upwards, the transport mode of this kind of location guide rail has made things convenient for the drilling work of puncher, effectively improve work efficiency, to not unidimensional elevator guide rail, the spacing between the regulating assembly adjustment left and right sides conveying roller of accessible both sides, guarantee that T word elevator guide rail normally fixes a position and carry, this kind of feeding mechanism suitability is strong, satisfy the pay-off work of different specification and dimension elevator guide rails.

Description

Feeding mechanism for elevator guide rail perforating device
Technical Field
The invention relates to the technical field of elevator guide rail production material conveying, in particular to a feeding mechanism for an elevator guide rail punching device.
Background
The elevator guide rail is a safety rail for the elevator to run up and down in a hoistway, the guide rail is arranged on the wall of the hoistway and is erected by the guide rail, and the guide rail bracket is fixedly connected to the wall of the hoistway. A common guide rail for elevators is a "T" shaped guide rail. High rigidity, high reliability, safety and low cost. The guide rail plane must be smooth without significant uneven surfaces.
In order to realize the installation of elevator guide rail, the both ends of elevator guide rail are provided with the hole site, carry out drilling work to the guide rail through the puncher now mostly, current elevator guide rail puncher is artifical manual pay-off more, then fix punching, because the special shape of elevator guide rail for conventional conveyor can't carry out fine location and carry, and be favorable to the continuous work of punching of puncher, consequently need a conveyor who is suitable for elevator guide rail, can effectively increase the efficiency of punching, shorten the time.
Therefore, the feeding mechanism for the elevator guide rail punching device is provided by the technical personnel in the field so as to solve the problems in the background.
Disclosure of Invention
The invention aims to provide a feeding mechanism for an elevator guide rail punching device, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides an elevator guide rail feeding mechanism for perforating device, includes the frame foundation, the pillar that bottom fixedly connected with bilateral symmetry set up in the frame foundation, the frame foundation left and right sides all rotates and is connected with drive assembly, and drive assembly equidistance setting in the frame foundation front and back orientation, the inboard fixedly connected with conveying roller of drive assembly is equipped with the predetermined distance between the conveying roller of both sides, and frame foundation both sides upper end is equipped with adjusting part, and adjusting part is connected with the cooperation of drive assembly, the pillar upper end is fixed with supporting component, and supporting component is located the conveying roller below.
As a further scheme of the invention: the transmission assembly comprises a sleeve shaft, a rotating shaft and a chain wheel, the sleeve shaft is rotatably connected to the frame base, guide holes and groove holes are formed in two ends of the sleeve shaft respectively, symmetrical clamping grooves are formed in the groove holes, one side of the guide holes is fixedly welded with a sealing plate, the chain wheel is fixedly connected to the sealing plate, the rotating shaft is sleeved in the sleeve shaft, symmetrical clamping strips are fixedly welded to the rotating shaft, the clamping strips are matched with the clamping grooves, a limiting plate is fixedly welded to one side of the rotating shaft, which is communicated with the guide holes, the diameter of the limiting plate is located between the groove holes and the diameter of the guide holes, a lantern ring is fixedly connected to the middle of the rotating shaft, a circumferential groove is formed in the lantern ring, the adjusting assembly.
As a still further scheme of the invention: the adjusting component comprises an adjusting screw, a mounting plate and a clamping plate, the adjusting screw is connected to the upper ends of the two sides of the frame base in a threaded fit mode, the mounting plate is connected to the right end of the adjusting screw in a limiting rotation mode, the clamping plate is fixedly connected to the lower end of the mounting plate in an equal distance mode below the mounting plate, a limiting groove is formed in the lower end of the plate, and the limiting groove in the clamping plate is matched with the circumferential groove of.
As a still further scheme of the invention: the supporting component comprises a seat plate, a supporting plate and supporting wheels, the seat plate is fixedly welded on the supporting column, the supporting plate is symmetrically fixed on the seat plate in a front-back and left-right mode, the supporting wheels are rotatably connected to the upper end of the supporting plate, and the supporting wheels are in surface contact with the conveying rollers.
As a still further scheme of the invention: the interval between the mounting panel below cardboard equals the interval between the adjacent conveying roller of front and back.
As a still further scheme of the invention: and the inner side edge of the conveying roller is subjected to fillet treatment.
As a still further scheme of the invention: and a round handle is fixedly connected to the outer side of the adjusting screw rod.
As a still further scheme of the invention: the pillars are fixed at the bottom of the frame seat in a welding mode, and the distance between the front and rear adjacent pillars is equal to the distance between the front and rear adjacent conveying rollers.
As a still further scheme of the invention: the conveying roller is made of rubber.
As a still further scheme of the invention: the sleeve shaft in the transmission assembly is rotatably connected to the frame base through a bearing, and the transmission assemblies are uniformly distributed in the front-back direction and are synchronously transmitted through chains.
Compared with the prior art, the invention has the beneficial effects that: firstly, a reserved gap is reserved between conveying rollers on two sides, so that a T-shaped guide rail is placed downwards during conveying, the front surface of a punched steel plate is upward, a feeding mechanism directly conveys the guide rail to a punching machine, the conveying mode of the positioning guide rail facilitates the drilling work of the punching machine, and the working efficiency is effectively improved;
secondly, for elevator guide rails with different sizes, the distance between the conveying rollers on the left side and the right side can be adjusted through the adjusting assemblies on the two sides, normal positioning and conveying of the T-shaped elevator guide rails are guaranteed, and due to the special structure of the transmission assembly, the conveying rollers can still rotate when adjusted.
Drawings
FIG. 1 is a schematic structural view of a feeding mechanism for an elevator guide rail punching device;
FIG. 2 is a schematic structural diagram of a side view of a feeding mechanism for an elevator guide rail perforating device;
FIG. 3 is a schematic structural diagram of a transmission assembly in a feeding mechanism for an elevator guide rail punching device;
FIG. 4 is a schematic view showing the connection between a mounting plate and a clamping plate in a feeding mechanism for an elevator guide rail punching device;
FIG. 5 is a schematic structural view of a support assembly in a feeding mechanism for an elevator guide rail perforating device;
in the figure: 1-frame seat, 2-support column, 3-transmission component, 4-conveying roller, 5-adjusting component, 6-supporting component, 301-sleeve shaft, 302-rotating shaft, 303-chain wheel, 304-guide hole, 305-slotted hole, 306-clamping groove, 307-sealing plate, 308-clamping strip, 309-limiting plate, 310-sleeve ring, 501-adjusting screw, 502-mounting plate, 503-clamping plate, 504-limiting groove, 505-round handle, 601-seat plate, 602-supporting plate and 603-supporting wheel.
Detailed Description
The technical solution of the present patent will be described in further detail with reference to the following embodiments.
The first embodiment is as follows: referring to fig. 1-2, a feeding mechanism for a punching device of an elevator guide rail comprises a frame base 1, wherein the bottom in the frame base 1 is fixedly connected with support columns 2 which are arranged in a bilateral symmetry manner, the left side and the right side of the frame base 1 are both rotatably connected with transmission assemblies 3, the transmission assemblies 3 are arranged in the front-back direction of the frame base 1 at equal intervals, the inner sides of the transmission assemblies 3 are fixedly connected with conveying rollers 4, a preset distance is reserved between the conveying rollers 4 at the two sides, the upper ends of the two sides of the frame base 1 are provided with adjusting assemblies 5, the adjusting assemblies 5 are connected with the transmission assemblies 3 in a matching manner, the upper ends of the support columns 2 are fixedly provided;
the transmission assembly 3 on the mechanism is driven by the chain to synchronously rotate, the conveying rollers 4 rotate along with the transmission assembly, and a reserved gap is reserved between the conveying rollers 4 on two sides, so that the T-shaped elevator guide rail is placed downwards when being conveyed, the plane of a punched steel plate is upward in front, the elevator guide rail is directly conveyed to the punching machine by the feeding mechanism, and the punching machine is convenient to drill;
referring to fig. 1 and 3, the transmission assembly 3 includes a sleeve shaft 301, a rotating shaft 302 and a sprocket 303, the sleeve shaft 301 is rotatably connected to the frame base 1, two ends of the sleeve shaft 301 are respectively provided with a guide hole 304 and a slot hole 305, the slot hole 305 is internally provided with symmetrical clamping grooves 306, one side of the sleeve shaft 301 provided with the guide hole 304 is fixedly welded with a sealing plate 307, the sprocket 303 is fixedly connected to the sealing plate 307, the rotating shaft 302 is sleeved in the sleeve shaft 301, the rotating shaft 302 is fixedly welded with symmetrical clamping strips 308, the clamping strips 308 are matched with the clamping grooves 306, one side of the rotating shaft 302 communicated with the guide hole 304 is fixedly welded with a limiting plate 309, the diameter of the limiting plate 309 is between the diameters of the slot hole 305 and the guide hole 304, the middle part of the rotating shaft 302 is fixedly connected with a collar 310, the collar 310 is provided with a circumferential groove, the adjustment assembly 5 is;
referring to fig. 1 and 4, the adjusting assembly 5 includes an adjusting screw 501, a mounting plate 502 and a clamping plate 503, the adjusting screw 501 is connected to the upper ends of the two sides of the frame base 1 through screw thread fit, a round handle 505 is fixedly connected to the outer side of the adjusting screw 501, the mounting plate 502 is connected to the right end of the adjusting screw 501 in a limiting rotation manner, the clamping plate 503 is fixedly connected below the mounting plate at equal intervals, a limiting groove 504 is formed at the lower end of the plate, and the limiting groove 504 on the clamping plate 503 is matched with the circumferential groove of the collar 310;
to the elevator guide rail of not different specification and dimension, accessible round handle 505 rotates adjusting screw 501 and drives mounting panel 502 and cardboard 503 side to side motion, and pivot 302 is horizontal slip in sleeve 301 this moment, and through the cooperation of card strip 308 and draw-in groove 306, sleeve 301 and pivot 302 remain the transmission throughout, and cardboard 503 drives lantern ring 310 side to side motion, and the interval between the adjustable left and right sides conveying roller 4 guarantees that T word elevator guide rail normally fixes a position and carries.
The distance between the clamping plates 503 below the mounting plate 502 is equal to the distance between the front and rear adjacent conveying rollers 4.
Referring to fig. 1, the inner edge of the conveyor roller 4 is rounded.
The pillars 2 are fixed at the bottom of the frame seat 1 in a welding mode, and the distance between the front and the back adjacent pillars 2 is equal to the distance between the front and the back adjacent conveying rollers 4.
The conveying roller 4 is made of rubber.
Sleeve shaft 301 rotates through the bearing and connects on frame 1 in transmission assembly 3, and the fore-and-aft direction equipartition sets up and carries out synchronous drive through the chain between the transmission assembly 3.
Example two: the present embodiment is described in addition based on the above implementation: referring to fig. 5, the supporting assembly 6 includes a seat plate 601, a supporting plate 602 and a supporting wheel 603, the seat plate 601 is fixedly welded on the pillar 2, the supporting plate 602 is fixed on the seat plate 601 symmetrically in front and back and left and right, the supporting wheel 603 is rotatably connected to the upper end of the supporting plate 602, and the supporting wheel 603 is in contact with the surface of the conveying roller 4;
the supporting component 6 ensures that the transmission component 3 can not deform to influence the working stability of the mechanism when the conveying roller 4 is used for bearing conveying.
The working principle of the invention is as follows: the transmission assembly 3 on the mechanism is driven by the chain to synchronously rotate, the conveying rollers 4 rotate along with the transmission assembly, and a reserved gap is reserved between the conveying rollers 4 on two sides, so that the T-shaped elevator guide rail is placed downwards when being conveyed, the plane of a punched steel plate is upward in front, the elevator guide rail is directly conveyed to the punching machine by the feeding mechanism, and the punching machine is convenient to drill; to the elevator guide rail of not different specification and dimension, accessible round handle 505 rotates adjusting screw 501 and drives mounting panel 502 and cardboard 503 side to side motion, and pivot 302 is horizontal slip in sleeve 301 this moment, and through the cooperation of card strip 308 and draw-in groove 306, sleeve 301 and pivot 302 remain the transmission throughout, and cardboard 503 drives lantern ring 310 side to side motion, and the interval between the adjustable left and right sides conveying roller 4 guarantees that T word elevator guide rail normally fixes a position and carries.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (10)

1. The utility model provides a feeding mechanism for elevator guide rail perforating device, includes frame foundation (1), pillar (2) that bottom fixedly connected with bilateral symmetry set up in frame foundation (1), its characterized in that, frame foundation (1) left and right sides all rotates and is connected with drive assembly (3), and drive assembly (3) equidistance setting on frame foundation (1) fore-and-aft direction, inboard fixedly connected with conveying roller (4) of drive assembly (3), be equipped with the predetermined distance between both sides conveying roller (4), frame foundation (1) both sides upper end is equipped with adjusting part (5), and adjusting part (5) are connected with drive assembly (3) cooperation, pillar (2) upper end is fixed with supporting component (6), and supporting component (6) are located conveying roller (4) below.
2. The feeding mechanism for the elevator guide rail punching device according to claim 1, wherein the transmission assembly (3) comprises a sleeve shaft (301), a rotating shaft (302) and a chain wheel (303), the sleeve shaft (301) is rotatably connected to the frame base (1), both ends of the sleeve shaft (301) are respectively provided with a guide hole (304) and a slot hole (305), the slot hole (305) is internally provided with symmetrical clamping grooves (306), one side of the sleeve shaft (301) provided with the guide hole (304) is fixedly welded with a sealing plate (307), the chain wheel (303) is fixedly connected to the sealing plate (307), the rotating shaft (302) is sleeved in the sleeve shaft (301), the rotating shaft (302) is fixedly welded with symmetrical clamping strips (308), the clamping strips (308) are matched with the clamping grooves (306), one side of the rotating shaft (302) communicated with the guide hole (304) is fixedly welded with a limiting plate (309), and the diameter of the limiting plate (309) is between the diameters of the slot hole (305) and the guide hole (304), the middle part of the rotating shaft (302) is fixedly connected with a sleeve ring (310), the sleeve ring (310) is provided with a circumferential groove, the adjusting component (5) is connected with the transmission component (3) through the circumferential groove, and the conveying roller (4) is fixedly sleeved on the rotating shaft (302).
3. The feeding mechanism for the elevator guide rail punching device according to claim 2, wherein the adjusting component (5) comprises an adjusting screw (501), a mounting plate (502) and a clamping plate (503), the adjusting screw (501) is connected to the upper ends of the two sides of the frame base (1) through thread fit, the mounting plate (502) is connected to the right end of the adjusting screw (501) in a limiting and rotating mode, the clamping plate (503) is fixedly connected below the mounting plate at an equal distance, the lower end of the plate is provided with a limiting groove (504), and the limiting groove (504) in the clamping plate (503) is matched with the circumferential groove of the sleeve ring (310).
4. The feeding mechanism for the perforating device of the elevator guide rail as claimed in claim 1, wherein the support assembly (6) comprises a seat plate (601), a support plate (602) and a support wheel (603), the seat plate (601) is fixedly welded on the pillar (2), the support plate (602) is symmetrically fixed on the seat plate (601) in front and back and left and right directions, the support wheel (603) is rotatably connected to the upper end of the support plate (602), and the support wheel (603) is in contact with the surface of the conveying roller (4).
5. The feeding mechanism for the elevator guide rail punching device according to claim 3, wherein the interval between the chucking plates (503) below the mounting plate (502) is equal to the interval between the front and rear adjacent conveying rollers (4).
6. The feeding mechanism for an elevator guide rail punching device according to claim 1 or 4, wherein the inner side edge of the feeding roller (4) is rounded.
7. The feeding mechanism for the elevator guide rail punching device according to claim 3, wherein a round handle (505) is fixedly connected to the outer side of the adjusting screw (501).
8. The feeding mechanism for the perforating device of the elevator guide rail as claimed in claim 1, characterized in that the pillars (2) are fixed to the bottom of the frame base (1) by welding, and the distance between the adjacent pillars (2) is equal to the distance between the adjacent conveying rollers (4).
9. The feeding mechanism for a perforating device for elevator guide rails as defined in claim 8, wherein the material of the feeding roller (4) is rubber.
10. The feeding mechanism for the elevator guide rail punching device according to claim 2, wherein the sleeve shaft (301) in the transmission assembly (3) is rotatably connected to the frame base (1) through a bearing, and the transmission assemblies (3) are uniformly arranged in the front-back direction and synchronously transmitted through a chain.
CN202011507069.5A 2020-12-18 2020-12-18 Feeding mechanism for elevator guide rail perforating device Withdrawn CN112719366A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011507069.5A CN112719366A (en) 2020-12-18 2020-12-18 Feeding mechanism for elevator guide rail perforating device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011507069.5A CN112719366A (en) 2020-12-18 2020-12-18 Feeding mechanism for elevator guide rail perforating device

Publications (1)

Publication Number Publication Date
CN112719366A true CN112719366A (en) 2021-04-30

Family

ID=75603969

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011507069.5A Withdrawn CN112719366A (en) 2020-12-18 2020-12-18 Feeding mechanism for elevator guide rail perforating device

Country Status (1)

Country Link
CN (1) CN112719366A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116532683A (en) * 2023-04-21 2023-08-04 泊头市金键模具有限责任公司 Processing equipment for automobile stamping template

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116532683A (en) * 2023-04-21 2023-08-04 泊头市金键模具有限责任公司 Processing equipment for automobile stamping template
CN116532683B (en) * 2023-04-21 2024-01-26 泊头市金键模具有限责任公司 Processing equipment for automobile stamping template

Similar Documents

Publication Publication Date Title
CN110919708B (en) Shoe edge cutting device
CN112719366A (en) Feeding mechanism for elevator guide rail perforating device
JP2009131927A (en) Shearing device
CN210678922U (en) Numerical control cutting device for transverse ring cutter
CN218252574U (en) Intermittent fixed-frequency feeding mechanism of stamping device
CN206936129U (en) A kind of Full automatic angular fitting special processing equipment
CN210855829U (en) Automatic cutting device for glass tube
CN106276381B (en) A kind of continous way grid roller shear separating system
CN206084409U (en) Crossing exchange workstation
CN212312241U (en) Stable plate conveying structure
CN210618724U (en) Automatic labeling equipment
CN209239321U (en) A kind of stage apparatus for shipyard component welding line
CN211418749U (en) Jacking shunt mechanism
CN112695941A (en) Curtain wall connecting piece and manufacturing and processing method thereof
CN112024931A (en) Cat ladder guardrail generates equipment
KR20090103833A (en) Frame cutting device of a sign board
CN218706255U (en) Conveying track for processing plates
CN211277590U (en) Cutting device for guide rail section steel
CN217095490U (en) Anchor rod production is with reinforcing bar thread rolling device
CN220164922U (en) Conveying device for canned food production process
CN220005595U (en) Photovoltaic support section bar punching equipment
CN214417806U (en) Plate shearing device with threaded rod distance adjusting mechanism for production of fixed plates
CN213888325U (en) Steel pipe puncher
CN217618524U (en) Automatic feeding structure of laser cutting machine
CN113306959B (en) High-speed vacuum belt conveyor

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
WW01 Invention patent application withdrawn after publication
WW01 Invention patent application withdrawn after publication

Application publication date: 20210430