CN114515956A - Quick change device for sleeve of tightening equipment - Google Patents
Quick change device for sleeve of tightening equipment Download PDFInfo
- Publication number
- CN114515956A CN114515956A CN202011307207.5A CN202011307207A CN114515956A CN 114515956 A CN114515956 A CN 114515956A CN 202011307207 A CN202011307207 A CN 202011307207A CN 114515956 A CN114515956 A CN 114515956A
- Authority
- CN
- China
- Prior art keywords
- sleeve
- clamping finger
- clamping
- finger
- tightening
- 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.)
- Granted
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/04—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for assembling or disassembling parts
- B23P19/06—Screw or nut setting or loosening machines
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Clamps And Clips (AREA)
- Manipulator (AREA)
Abstract
The invention relates to the field of auxiliary devices of automatic tightening equipment, in particular to a quick-change device for a sleeve of the tightening equipment, which comprises a telescopic mechanism and a sleeve replacing mechanism, wherein the telescopic mechanism comprises a moving plate, the sleeve replacing mechanism is arranged on the moving plate, the sleeve replacing mechanism comprises two groups of sleeve clamping components which are symmetrically arranged, each sleeve clamping component comprises a clamping cylinder, a movable sleeve clamping finger, a fixed sleeve clamping finger, a sleeve in-place detection sensor and a sleeve storage tool, the movable sleeve clamping finger is driven to move by the clamping cylinder, a sleeve separation block is arranged on the upper side of the movable sleeve clamping finger, the sleeve in-place detection sensor is arranged on the fixed sleeve clamping finger, and the sleeve storage tool is arranged between the movable sleeve clamping finger and the fixed sleeve clamping finger. The invention can realize the storage of different types of sleeves, the front end of the tightening shaft is automatically led in, the sleeves are automatically clamped in the storage process, the picking and placing accuracy is high, the structure is compact, and the flexible production requirement is met.
Description
Technical Field
The invention relates to the field of auxiliary devices of automatic tightening equipment, in particular to a quick-changing device for a sleeve of tightening equipment.
Background
In order to control production cost and improve production efficiency and quality, automatic tightening equipment is increasingly adopted to replace manual tightening in a production line, and along with more and more full-automatic tightening equipment are applied to a flexible production line for collinear production of multiple products, bolts of multiple models are screwed at the same station by the full-automatic tightening equipment, a sleeve is an important part of the automatic tightening equipment, but most of the work of replacing the sleeve by the existing automatic tightening equipment is manual replacement on the production line, the production line needs to be paused during replacement, the labor intensity of manual operation is increased, time waste is caused by line halt replacement, the production efficiency is reduced, in addition, workers need to enter the equipment for internal operation during manual replacement, and the risk that the workers are subjected to mechanical injury is increased.
Disclosure of Invention
The invention aims to provide a quick sleeve changing device for a tightening device, which can realize storage of different types of sleeves, automatically guide the front end of a tightening shaft in, automatically clamp the sleeves in the storage process, have high taking and placing accuracy and compact structure, do not occupy excessive space, and can meet the automatic sleeve changing requirement in the flexible production process.
The purpose of the invention is realized by the following technical scheme:
the utility model provides a screw up equipment sleeve quick change device, changes the mechanism including telescopic machanism and sleeve, wherein telescopic machanism includes the cylinder and passes through cylinder driven movable plate, sleeve change the mechanism install in on the movable plate, sleeve change the mechanism and include the sleeve clamping component that two sets of symmetries set up, sleeve clamping component includes die clamping cylinder, movable sleeve clamp finger, fixed sleeve clamp finger, sleeve detection sensor and sleeve in place deposit the frock, and wherein movable sleeve clamp finger removes through die clamping cylinder drive, just movable sleeve clamp finger upside is equipped with the sleeve and breaks away from the piece, and sleeve detection sensor in place locates fixed sleeve clamp finger is last, and the sleeve is deposited the frock and is located movable sleeve clamp finger and fixed sleeve clamp finger between.
The sleeve replacing mechanism comprises a supporting plate, two groups of sleeve clamping assemblies are symmetrically arranged on the supporting plate, a clamping cylinder is arranged on the lower side of the supporting plate, a movable sleeve clamping finger, a sleeve storing tool and a fixed sleeve clamping finger are arranged on the upper side of the supporting plate, a connecting seat is arranged at the end part of a cylinder rod of the clamping cylinder, and the movable sleeve clamping finger is fixedly connected with the connecting seat.
The movable sleeve clamping finger is provided with a plurality of first clamping finger notches, the fixed sleeve clamping finger is provided with a plurality of second clamping finger notches, the first clamping finger notches correspond to the second clamping finger notches one to one, the sleeve storage tool is arranged between the corresponding first clamping finger notches and the corresponding second clamping finger notches, and the sleeve is arranged on the sleeve storage tool.
Two sides of each clamping finger notch are provided with sleeve clamping finger adjusting pads.
The sleeve separating block is in an inverted L shape, the upper horizontal part of the sleeve separating block clamps the sleeve, and the horizontal part of the sleeve separating block is provided with a tightening shaft notch for a tightening shaft to pass through.
The movable plate and the cylinder of the telescopic mechanism are both arranged on a fixed support, the movable plate is connected with the fixed support in a sliding mode, a bracket is arranged at one end of the movable plate, and the sleeve replacing mechanism is arranged on the bracket.
The fixed support is provided with a limiting device, the limiting device comprises an installation support and a hydraulic buffer, and a limiting stop matched with the hydraulic buffer is arranged at one end, far away from the sleeve replacing mechanism, of the movable plate.
The invention has the advantages and positive effects that:
1. the automatic sleeve taking and placing device can be used for storing different types of sleeves, the front end of the tightening shaft is automatically led in, the sleeves are automatically clamped in the storing process, the taking and placing accuracy is high, the structure is compact, excessive space cannot be occupied, and the automatic sleeve replacing requirement in the flexible production process can be met.
2. The invention can automatically complete the replacement of the sleeve of the tightening shaft without manual participation, has high automation degree and avoids the injury to personnel caused by equipment reasons.
Drawings
Figure 1 is a schematic structural view of the present invention,
figure 2 is a schematic view of the cartridge changing mechanism of figure 1,
figure 3 is a cross-sectional view of the cannula exchange mechanism of figure 2,
figure 4 is a schematic view of the telescopic structure of figure 1,
fig. 5 is a schematic view of the limiting device in fig. 1.
Wherein, 1 is a telescopic mechanism, 101 is a movable plate, 102 is a limit stop, 103 is a drag chain, 104 is a linear guide rail, 105 is an air cylinder, and 106 is a mounting plate; 2, a sleeve replacing mechanism, 201 a connecting seat, 202 a movable sleeve clamping finger, 203 a sleeve separating block, 204 a fixed sleeve clamping finger, 205 a sleeve in-situ detection sensor, 206 a sleeve, 207 a sleeve clamping finger adjusting pad, 208 a clamping cylinder and 209 a sleeve storing tool; 210 is a supporting plate; 3 is a bracket; 4, a limiting device, a mounting support 401 and a hydraulic buffer 402 are arranged; and 5, a fixed bracket.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1 to 5, the present invention comprises a telescoping mechanism 1 and a sleeve replacing mechanism 2, wherein the telescoping mechanism 1 comprises a cylinder 105 and a moving plate 101, and the moving plate 101 is driven to move by the cylinder 105, the sleeve replacing mechanism 2 is installed on the moving plate 101, as shown in fig. 2 to 3, the sleeve replacing mechanism 2 includes a supporting plate 210 and two sets of sleeve clamping assemblies symmetrically disposed on the supporting plate 210, the sleeve clamping assembly comprises a clamping cylinder 208, a movable sleeve clamping finger 202, a fixed sleeve clamping finger 204, a sleeve in-place detection sensor 205 and a sleeve storage tool 209, the movable sleeve clamping finger 202 is driven to move by a clamping cylinder 208, a sleeve separation block 203 is arranged on the upper side of the movable sleeve clamping finger 202, a sleeve in-place detection sensor 205 is arranged on the fixed sleeve clamping finger 204, and a sleeve storage tool 209 is arranged between the movable sleeve clamping finger 202 and the fixed sleeve clamping finger 204. The sleeve in-place detection sensor 205 is well known in the art and is a commercially available product.
As shown in fig. 2 to 3, a clamping cylinder 208 in the sleeve clamping assembly is disposed at a lower side of the support plate 210, a movable sleeve clamping finger 202, a sleeve storage fixture 209 and a fixed sleeve clamping finger 204 are disposed at an upper side of the support plate 210, a connecting seat 201 is disposed at an end of a rod of the clamping cylinder 208, and the movable sleeve clamping finger 202 is fixedly connected to the connecting seat 201.
As shown in fig. 2, a plurality of first finger notches are formed in the movable sleeve finger 202, a plurality of second finger notches are formed in the fixed sleeve finger 204, the first finger notches correspond to the second finger notches one to one, a sleeve storage fixture 209 is disposed between the corresponding first finger notches and the corresponding second finger notches, a sleeve 206 is disposed on the sleeve storage fixture 209, and a sleeve finger adjustment pad 207 is disposed on each of two sides of each finger notch.
As shown in fig. 3, the sleeve detachment block 203 is in an inverted L shape, when the sleeve 206 is replaced by the tightening shaft, the tightening shaft descends to drop the sleeve 206 at the head end onto the corresponding sleeve storage tool 209, then the clamping cylinder 208 operates to move the movable sleeve clamping finger 202, so that the corresponding first clamping finger notch and second clamping finger notch clamp the sleeve 206, the horizontal portion of the sleeve detachment block 203 on the upper side of the movable sleeve clamping finger 202 clamps the sleeve 206 to achieve a limit, then the tightening shaft ascends to achieve the detachment of the sleeve 206, and a plurality of tightening shaft notches for the tightening shaft to pass through are formed in the horizontal portion on the upper side of the sleeve detachment block 203.
As shown in fig. 1, the moving plate 101 and the cylinder 105 of the telescoping mechanism 1 are both disposed on a fixed bracket 5, the moving plate 101 is slidably connected to the fixed bracket 5, a bracket 3 is disposed at one end of the moving plate 101, and the sleeve replacing mechanism 2 is disposed on the bracket 3.
As shown in fig. 4, the moving plate 101 is slidably connected to the lower fixed bracket 5 through a slider and a linear guide 104, an installation plate 106 is disposed at an end of the moving plate 101, the bracket 3 is fixedly mounted on the installation plate 106, and a drag chain 103 is disposed on one side of the moving plate 101 for accommodating a related pipeline.
As shown in fig. 1, a limiting device 4 is disposed on the fixed bracket 5, as shown in fig. 5, the limiting device 4 includes a mounting seat 401 and a hydraulic buffer 402, as shown in fig. 4, a limiting stopper 102 is disposed at an end of the moving plate 101 away from the sleeve replacing mechanism 2, and the limiting stopper 102 abuts against the hydraulic buffer 402 to limit the moving plate 101.
The working principle of the invention is as follows:
when the sleeve 206 is required to be selected by the tightening shaft, the air cylinder 105 in the telescopic mechanism 1 acts to drive the moving plate 101 to send the sleeve replacing mechanism 2 to the tightening shaft sleeve replacing position, the sleeve 206 is in a clamping state, the tightening shaft descends to extend into the upper side hole of the sleeve 206, then the tightening shaft rotates with a small torque, after the tightening shaft is completely inserted into the sleeve 206, the clamping air cylinder 208 acts to loosen the sleeve 206, the tightening shaft ascends to remove the required sleeve 206, the sleeve on-site detection sensor 205 detects that the sleeve 206 is separated from the storage position to prove that the sleeve is removed, the air cylinder 105 in the telescopic mechanism 1 acts to retract the mechanism, and the sleeve replacing mechanism 2 is sent to the original position.
When the sleeve needs to be replaced by the tightening shaft, the air cylinder 105 in the telescopic mechanism 1 acts to send the replacing mechanism 2 to a sleeve replacing position of the tightening shaft, the tightening shaft moves to the position above the vacant position of the sleeve storing tool 209, the tightening shaft descends and rotates with a small torque, when the sleeve 206 at the lower end of the tightening shaft completely falls into the sleeve storing tool 209, the clamping air cylinder 208 acts to clamp the sleeve 206, the horizontal part of the sleeve disengaging block 203 simultaneously clamps the upper limit of the sleeve 206, then the tightening shaft ascends, the sleeve 206 is left on the sleeve storing tool 209 and is disengaged from the tightening shaft, when the sleeve on-site detection sensor 205 detects that the sleeve 206 is stored in the originally vacant storing position, a signal is sent to prompt that the sleeve disassembling action is completed, then the tightening shaft moves to the position above the required sleeve 206, and the sleeve 206 selecting action is repeated. After the replacement of the sleeve 206 is completed, the cylinder 105 in the telescopic mechanism 1 operates to retract the moving plate 101 to send the sleeve replacement mechanism 2 to the home position, and the replacement of the sleeve 206 is completed.
Claims (7)
1. The utility model provides a screw up equipment sleeve quick change device which characterized in that: comprises a telescopic mechanism (1) and a sleeve replacing mechanism (2), wherein the telescopic mechanism (1) comprises an air cylinder (105) and a moving plate (101) driven by the air cylinder (105), the sleeve replacing mechanism (2) is arranged on the moving plate (101), the sleeve replacing mechanism (2) comprises two groups of sleeve clamping components which are symmetrically arranged, each sleeve clamping component comprises a clamping cylinder (208), a movable sleeve clamping finger (202), a fixed sleeve clamping finger (204), a sleeve in-place detection sensor (205) and a sleeve storage tool (209), wherein the movable sleeve clamping finger (202) is driven to move by a clamping cylinder (208), and the upper side of the movable sleeve clamping finger (202) is provided with a sleeve separation block (203), the sleeve in-place detection sensor (205) is arranged on the fixed sleeve clamping finger (204), and the sleeve storage tool (209) is arranged between the movable sleeve clamping finger (202) and the fixed sleeve clamping finger (204).
2. The quick-change device for the sleeve of the tightening equipment according to claim 1, wherein: the sleeve replacing mechanism (2) comprises a supporting plate (210), two sets of sleeve clamping assemblies are symmetrically arranged on the supporting plate (210), a clamping cylinder (208) is arranged on the lower side of the supporting plate (210), a movable sleeve clamping finger (202), a sleeve storage tool (209) and a fixed sleeve clamping finger (204) are arranged on the upper side of the supporting plate (210), a connecting seat (201) is arranged at the end part of a cylinder rod of the clamping cylinder (208), and the movable sleeve clamping finger (202) is fixedly connected with the connecting seat (201).
3. The quick-change device for the sleeve of the tightening equipment according to claim 1, wherein: the movable sleeve clamping finger (202) is provided with a plurality of first clamping finger notches, the fixed sleeve clamping finger (204) is provided with a plurality of second clamping finger notches, the first clamping finger notches correspond to the second clamping finger notches in a one-to-one mode, a sleeve storage tool (209) is arranged between the corresponding first clamping finger notches and the corresponding second clamping finger notches, and a sleeve (206) is arranged on the sleeve storage tool (209).
4. The quick-change device for the sleeve of the tightening equipment according to claim 3, wherein: two sides of each clamping finger notch are provided with sleeve clamping finger adjusting pads (207).
5. The quick-change device for the sleeve of the tightening equipment according to claim 1, wherein: the sleeve separating block (203) is in an inverted L shape, an upper horizontal part of the sleeve separating block clamps the sleeve (206), and a tightening shaft notch for a tightening shaft to pass through is formed in the horizontal part of the sleeve separating block (203).
6. The quick-change device for the sleeve of the tightening equipment according to claim 1, wherein: moving plate (101) and cylinder (105) of telescopic machanism (1) all locate on a fixed bolster (5), just moving plate (101) with fixed bolster (5) sliding connection moving plate (101) one end is equipped with bracket (3), sleeve replacement mechanism (2) are located on bracket (3).
7. The quick change device for the sleeve of the tightening apparatus according to claim 6, wherein: the fixed support (5) is provided with a limiting device (4), the limiting device (4) comprises an installation support (401) and a hydraulic buffer (402), and one end, far away from the sleeve replacing mechanism (2), of the moving plate (101) is provided with a limiting stop block (102) matched with the hydraulic buffer (402).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202011307207.5A CN114515956B (en) | 2020-11-20 | 2020-11-20 | Screw up equipment sleeve quick change device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202011307207.5A CN114515956B (en) | 2020-11-20 | 2020-11-20 | Screw up equipment sleeve quick change device |
Publications (2)
Publication Number | Publication Date |
---|---|
CN114515956A true CN114515956A (en) | 2022-05-20 |
CN114515956B CN114515956B (en) | 2023-05-09 |
Family
ID=81595506
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202011307207.5A Active CN114515956B (en) | 2020-11-20 | 2020-11-20 | Screw up equipment sleeve quick change device |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN114515956B (en) |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19616311C1 (en) * | 1996-04-24 | 1997-06-26 | Abb Patent Gmbh | Device for changing screw tool |
WO2009110059A1 (en) * | 2008-03-04 | 2009-09-11 | 富士通株式会社 | Screw fastening device |
CN103433719A (en) * | 2013-08-23 | 2013-12-11 | 安徽吉斯通自动化装备有限公司 | Automatic sleeve replacement mechanism |
CN205397320U (en) * | 2016-03-18 | 2016-07-27 | 山东新安凯科控科技有限公司 | Material conveyor of casing class part |
CN106363409A (en) * | 2016-12-06 | 2017-02-01 | 重庆斯克特科技有限公司 | Sleeve replacement device and automatic tightening system |
CN206702563U (en) * | 2017-03-09 | 2017-12-05 | 广州协鸿工业机器人技术有限公司 | Sleeve apparatus for automatic change |
CN109894853A (en) * | 2019-04-04 | 2019-06-18 | 伟本智能机电(上海)股份有限公司 | One kind tightening sleeve quick-changing mechanism |
CN211193554U (en) * | 2019-09-06 | 2020-08-07 | 潍坊大世智能科技有限公司 | Automatic sleeve replacing device |
WO2020212055A1 (en) * | 2019-04-16 | 2020-10-22 | Böllhoff Verbindungstechnik GmbH | Setting head, sheet metal press or setting device having this setting head, and a method for joining a joining element with the setting head |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111805224B (en) * | 2020-08-07 | 2024-09-17 | 上汽通用五菱汽车股份有限公司 | Automatic sleeve changing system for bolt tightening station |
-
2020
- 2020-11-20 CN CN202011307207.5A patent/CN114515956B/en active Active
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19616311C1 (en) * | 1996-04-24 | 1997-06-26 | Abb Patent Gmbh | Device for changing screw tool |
WO2009110059A1 (en) * | 2008-03-04 | 2009-09-11 | 富士通株式会社 | Screw fastening device |
CN103433719A (en) * | 2013-08-23 | 2013-12-11 | 安徽吉斯通自动化装备有限公司 | Automatic sleeve replacement mechanism |
CN205397320U (en) * | 2016-03-18 | 2016-07-27 | 山东新安凯科控科技有限公司 | Material conveyor of casing class part |
CN106363409A (en) * | 2016-12-06 | 2017-02-01 | 重庆斯克特科技有限公司 | Sleeve replacement device and automatic tightening system |
CN206702563U (en) * | 2017-03-09 | 2017-12-05 | 广州协鸿工业机器人技术有限公司 | Sleeve apparatus for automatic change |
CN109894853A (en) * | 2019-04-04 | 2019-06-18 | 伟本智能机电(上海)股份有限公司 | One kind tightening sleeve quick-changing mechanism |
WO2020212055A1 (en) * | 2019-04-16 | 2020-10-22 | Böllhoff Verbindungstechnik GmbH | Setting head, sheet metal press or setting device having this setting head, and a method for joining a joining element with the setting head |
CN211193554U (en) * | 2019-09-06 | 2020-08-07 | 潍坊大世智能科技有限公司 | Automatic sleeve replacing device |
Also Published As
Publication number | Publication date |
---|---|
CN114515956B (en) | 2023-05-09 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN104070635B (en) | The autocontrol method of strips injection moulding and robot transportation system | |
CN110712026B (en) | Automatic press fitting equipment for middle bearing and anti-rotation pin of automobile air conditioner compressor | |
CN201020616Y (en) | Engine cylinder head conduit, seat ring full-automatic press-fitting machine | |
CN106002161A (en) | Electronic drain valve core assembling machine | |
CN107309562B (en) | Automatic welding and feeding equipment for oxygen sensor and operation method thereof | |
CN110777653B (en) | Bridge check out test set | |
CN208628989U (en) | The automatic tool changer of machining center is bored in a kind of horizontal milling | |
CN205834625U (en) | Electronic drain valve core kludge | |
CN107253036A (en) | One kind is oriented to pin bush(ing) automatic installation apparatus and its installation method | |
CN115945899A (en) | Automatic assembly equipment for compression valve | |
CN114515956A (en) | Quick change device for sleeve of tightening equipment | |
CN204013113U (en) | A kind of micromotor stator automatic press mounting system | |
CN211439794U (en) | Automatic press fitting equipment for middle bearing and anti-rotation pin of automobile air conditioner compressor | |
CN212398380U (en) | Unloader for tapping machine | |
CN209157628U (en) | A kind of clutch driven plate pressure mounting of the spring machine | |
CN104191219B (en) | A kind of fog lamp jump ring assembling device | |
CN105810474A (en) | Third assembling mechanism of limiting switch assembling machine | |
CN108871678B (en) | Gear shifting positioning pin air tightness detection device for automobile gearbox | |
CN113649811B (en) | Semi-automatic drilling machine tool for rocker arm assembly | |
CN213915527U (en) | Extrusion device for aerospace discharging | |
CN113020990B (en) | Automatic production line for motorcycle cylinder | |
CN104399826A (en) | Automatic die changing device of bending machine | |
CN208653718U (en) | Shift positioning pin air-tightness detection device for automobile gearbox | |
CN109604499B (en) | Method for quickly positioning and replacing bottom die | |
CN210817548U (en) | Drilling machine for machining gate sealing element |
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 | ||
GR01 | Patent grant | ||
GR01 | Patent grant |