CN113417918A - Expansion bolt capable of injecting glue into bolt and using method thereof - Google Patents
Expansion bolt capable of injecting glue into bolt and using method thereof Download PDFInfo
- Publication number
- CN113417918A CN113417918A CN202110815114.1A CN202110815114A CN113417918A CN 113417918 A CN113417918 A CN 113417918A CN 202110815114 A CN202110815114 A CN 202110815114A CN 113417918 A CN113417918 A CN 113417918A
- Authority
- CN
- China
- Prior art keywords
- expansion
- glue
- sleeve
- nail
- bolt
- 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.)
- Pending
Links
- 239000003292 glue Substances 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims description 5
- 238000007789 sealing Methods 0.000 claims abstract description 30
- 238000002347 injection Methods 0.000 claims abstract description 26
- 239000007924 injection Substances 0.000 claims abstract description 26
- 229920001651 Cyanoacrylate Polymers 0.000 claims description 15
- 239000004830 Super Glue Substances 0.000 claims description 15
- 238000001035 drying Methods 0.000 claims description 7
- 239000011449 brick Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 238000005452 bending Methods 0.000 claims description 3
- 239000012466 permeate Substances 0.000 claims description 3
- 239000006260 foam Substances 0.000 claims description 2
- 230000000149 penetrating effect Effects 0.000 claims description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 239000002184 metal Substances 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000005034 decoration Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000005187 foaming Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000004568 cement Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
Images
Classifications
-
- 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
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
- F16B13/04—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front
- F16B13/06—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve
- F16B13/063—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve by the use of an expander
Abstract
An expansion bolt capable of injecting glue into the bolt comprises an expansion nail, a sleeve, a limiting seat, a U-shaped ring and a sealing ring; the expansion nail is characterized in that a nail cap is arranged above the expansion nail, a cross groove is formed in the middle of the nail cap, and a glue injection inlet is formed in the bottom of the cross groove; the glue injection inlet is communicated with a channel in the middle of the expansion nail, and an upper outlet and a lower outlet which are arranged in the middle and below the expansion nail are communicated with the channel in the middle of the expansion nail; the lower end of the expansion nail is provided with a thread head, and the hardness of the expansion nail is greater than that of the sleeve; the middle of the sleeve is provided with an inner cavity, and the lower end of the sleeve is provided with at least two slots; when the screw head below the expansion nail forcibly extrudes the bump, the barb strip is forced to turn outwards; the invention can inject glue into the wall body from the middle of the expansion nail, can improve the hardness of the soft wall surface, improves the integral pull-out strength of the expansion nail, and is particularly suitable for being installed and used on the wall body with soft texture.
Description
Technical Field
The invention relates to the field of architectural decoration, in particular to an expansion bolt capable of injecting glue into the bolt.
Background
The expansion bolts are made of plastic, metal or a mixture of plastic and metal. In building decoration engineering, metal expansion bolts are mainly used.
The expansion bolt utilizes the wedge-shaped inclination to promote expansion to generate friction gripping force, thereby achieving the fixing effect. One end of the screw is a thread, the other end of the screw has a taper, an iron sheet or an iron sheet cylinder (steel pipe) is covered on the outer surface of the screw, a plurality of notches are arranged on the half of the screw, the screw and the steel pipe are plugged into a hole drilled on the wall together, then a nut is locked, the screw is pulled outwards by the nut, the taper is pulled into the iron sheet cylinder, the iron sheet cylinder is expanded, and the expansion bolt is tightly fixed on the wall. Expansion bolts are generally used for fastening guard rails, rain canopies, air conditioners and the like on materials such as cement, bricks and the like. If the load has great vibrations, the expansion bolts are not fixed reliably, and the expansion bolts may loosen or even fall off under long-term vibrations.
In order to reduce the load of the building, the indoor wall is mostly made of foamed bricks except for the load-bearing wall. The expansion bolts are fixed on the soft foaming brick wall body, and the possibility of loosening of the expansion bolts is higher due to insufficient strength of the wall body.
How to strengthen the strength of the foaming brick wall body at the position for fixing the expansion bolt so as to strengthen the pull-out resistance and the bearing strength of the expansion bolt is a problem to be seriously solved in the building interior decoration engineering.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides an expansion bolt capable of injecting glue into the bolt.
The technical scheme adopted by the invention is as follows: an expansion bolt capable of injecting glue into the bolt comprises an expansion nail, a sleeve, a limiting seat, a U-shaped ring and a sealing ring; the expansion nail is characterized in that a nail cap is arranged above the expansion nail, a cross groove is formed in the middle of the nail cap, and a glue injection inlet is formed in the bottom of the cross groove; the glue injection inlet is communicated with a channel in the middle of the expansion nail, and an upper outlet and a lower outlet which are arranged in the middle and below the expansion nail are communicated with the channel in the middle of the expansion nail; the lower end of the expansion nail is provided with a thread head; the hardness of the expansion nail is greater than that of the sleeve; an inner cavity is arranged in the middle of the sleeve, at least two slots are formed in the lower end of the sleeve, the lower portion of the sleeve is divided into a plurality of barb strips, a convex block is arranged in the middle of the inner face of each barb strip, and hook teeth are arranged on the outer face of each barb strip; the limiting seat is fixed at the upper end of the sleeve, a groove is formed in the middle of the limiting seat, through holes are formed in two ends of the limiting seat, and limiting teeth are arranged below the limiting seat; two ends of the U-shaped ring are arranged into oppositely folded elbows; the bending head is inserted into the through hole; the sealing ring is sleeved on the expansion nail.
The sealing ring is made of rubber.
The cross groove can be matched with a cross head of a cross screwdriver; the diameter of the nail cap is smaller than that of the groove.
When the screw head below the expansion nail extrudes the bump forcibly, the barb strip is forced to turn outwards; the screw cap drives the screw head to downwards forcibly extrude the convex block, the sealing ring can be extruded and fixed at the top end of the sleeve, and a cross screwdriver is inserted into the cross groove to rotate, so that the pressure of the screw cap extruding the sealing ring can be adjusted.
When the adjusting screw cap extrudes the sealing ring until air in the sleeve can not enter or exit from any part of the sealing ring, inserting an injection needle with the diameter of mm into the glue injection inlet, and injecting glue into the expansion screw; the glue can flow out from the upper outlet through the channel to fill the inner cavity and flow out from the slot and the lower outlet to fill the gap between the expansion bolt and the wall material.
The diameter size of the U-shaped ring is smaller than that of the through hole, and external force which is not parallel to the central line of the through hole is applied to the U-shaped ring, so that the U-shaped ring can rotate by taking the central line of the through hole as a circle center.
By adopting the technical scheme of the invention, the invention has the following beneficial effects:
1) after the expansion nail is installed and fixed, slow-drying type super glue is injected into the expansion nail, and the super glue can be injected and permeate into a soft wall body, so that the local strength of the soft wall body is improved;
2) the invention can effectively improve the anti-pulling strength of the expansion nail fixed on the soft wall body, is beneficial to improving the bearing capacity of the expansion nail fixed on the partially reinforced wall body, and is particularly suitable for being installed and used on the soft wall body.
Drawings
FIG. 1 is a perspective view of the present invention (the state in which the expansion nail is not forcibly inserted into the metal sleeve);
FIG. 2 is a schematic view of the construction of the present invention (side plan view);
FIG. 3 is a schematic view of the construction of the present invention (side elevation);
FIG. 4 is a perspective view of the present invention (the state where the expansion nail is forcibly inserted into the metal sleeve to force the lower portion of the metal sleeve to be opened);
FIG. 5 is a cross-sectional view of the internal structure of the present invention;
in the figure: the expansion nail comprises an expansion nail 10, a nail cap 11, a cross groove 12, a glue injection inlet 13, a channel 14, an upper outlet 15, a lower outlet 16, a threaded head 17, a sleeve 20, an inner cavity 21, a groove 22, a bump 23, a barb strip 24, a limiting seat 30, a groove 31, a through hole 32, limiting teeth 33, a U-shaped ring 40, a bent head 41 and a sealing ring 50.
Detailed Description
The invention is further illustrated by the following figures and examples: as shown in fig. 1 to 5, an expansion bolt capable of injecting glue into the bolt comprises an expansion nail 10, a sleeve 20, a limiting seat 30, a U-shaped ring 40 and a sealing ring 50; the expansion nail is characterized in that a nail cap 11 is arranged above the expansion nail 10, a cross groove 12 is arranged in the middle of the nail cap 11, and a glue injection inlet 13 is arranged at the bottom of the cross groove 12; the glue injection inlet 13 is communicated with a channel 14 in the middle of the expansion nail 10, and an upper outlet 15 and a lower outlet 16 which are arranged in the middle and below the expansion nail 10 are communicated with the channel 14 in the middle of the expansion nail 10; the lower end of the expansion nail 10 is provided with a thread head 17; the hardness of the expansion nail 10 is greater than that of the sleeve 20; an inner cavity 21 is arranged in the middle of the sleeve 20, at least two slots 22 are formed in the lower end of the sleeve 20, the lower portion of the sleeve 20 is divided into a plurality of barb strips 24, a convex block 23 is arranged in the middle of the inner face of each barb strip 24, and hook teeth are arranged on the outer face of each barb strip; the limiting seat 30 is fixed at the upper end of the sleeve 20, a groove 31 is arranged in the middle of the limiting seat 30, through holes 32 are arranged at two ends of the limiting seat 30, and limiting teeth 33 are arranged below the limiting seat 30; two ends of the U-shaped ring 40 are arranged to be folded into the elbow 41; the bending head 41 is inserted in the through hole 32; the sealing ring 50 is sleeved on the expansion nail 10.
The sealing ring 50 is made of rubber, and the hardness of the sealing ring 50 is Shore A50.
The cross recess 12 can be adapted to the cross of a cross screwdriver.
The diameter of the nail cap 11 is smaller than that of the groove 31.
When the thread head 17 below the expansion nail 10 forcibly presses the lug 23, the barb strip 24 is forced to turn outwards; the screw cap 11 drives the screw head 17 to forcibly extrude the bump 23 downwards, the sealing ring 50 can be extruded and fixed at the top end of the sleeve 20, and a cross screwdriver is inserted into the cross groove 12 to rotate, so that the pressure of the screw cap 11 for extruding the sealing ring 50 can be adjusted.
When the adjusting screw cap 11 presses the sealing ring 50 until the air in the sleeve 20 can not enter or exit from any part of the sealing ring 50, inserting an injection needle with the diameter of 1.2 mm into the glue injection inlet 13, and injecting glue into the expansion screw 10; glue will flow out of the upper outlet 15 through the channel 14 to fill the cavity 21 and out of the slot 22 and the lower outlet 16 to fill the gap between the expansion bolt and the wall material.
The diameter of the U-shaped ring 40 is smaller than that of the through hole 32, and an external force which is not parallel to the central line of the through hole 32 is applied to the U-shaped ring 40, so that the U-shaped ring 40 can rotate by taking the central line of the through hole 32 as a circle center.
The use method of the expansion bolt capable of injecting glue into the bolt comprises the following steps:
1) preparing an electric hammer, and installing an electric hammer drill bit with the diameter being about 1 mm larger than the diameter of the sleeve 20;
2) a hole is drilled in the wall body, and the depth dimension of the hole is larger than the length dimension of the sleeve 20;
3) inserting the sleeve 20 into the hole, and embedding the limiting teeth 33 on the sleeve 20 into the wall;
4) inserting the screw head 17 into the sleeve 20, striking the nail cap 11, and enabling the screw head 17 to extrude the bump 23 until the screw head 17 extrudes the bump 23 to be turned outwards, so that the bump 23 is tightly attached to the wall of the hole;
5) a cross screwdriver is inserted into the cross groove 12 to rotate, the pressure of the screw cap 11 on the sealing ring 50 is adjusted until the screw cap 11 extrudes the sealing ring 50 to seal the upper port of the sleeve 20;
6) selecting slow-drying type super glue capable of penetrating into the foam brick, installing an injection needle with the diameter matched with the glue injection inlet 13 at the mouth of the glue bottle, inserting the injection needle into the glue injection inlet 13, and injecting the slow-drying type super glue into the expansion nail 10;
7) filling slow-dry type super glue in the expansion nail 10 and the sleeve 20, and leading the slow-dry type super glue to permeate into the wall material towards the outside of the sleeve 20;
8) stopping injecting glue when slow-dry type super glue overflows between the hole in the wall body and the expansion nail 10;
9) and putting the glue into normal use after the glue is solidified.
In this embodiment, the slow-drying type super glue injected from the glue injection inlet 13 can penetrate into the wall, and when the glue is not solidified, the glue is injected from the glue injection inlet 13, so that the space between the wall and the sleeve 20 is filled with the glue slowly.
The invention has the following beneficial effects: after the expansion nail is installed and fixed, slow-drying type super glue is injected into the expansion nail, the super glue can be injected into a soft wall body, so that the local part of the soft wall body becomes very strong, the pull-out resistance strength of the expansion nail fixed on the soft wall body can be effectively improved, and the bearing capacity of the expansion nail fixed on the locally reinforced wall body can be improved; the expansion nail is injected with glue into the wall, so that the local hardness of the soft wall is improved, and the expansion nail is particularly suitable for being installed and used on the wall with soft texture.
The above examples of the present invention are illustrative of typical embodiments of the present invention and are not intended to limit the embodiments of the present invention. Obvious variations from the embodiments of the present invention are still within the scope of the claims of the present invention.
Claims (9)
1. An expansion bolt capable of injecting glue into the bolt comprises an expansion nail 10, a sleeve 20, a limiting seat 30, a U-shaped ring 40 and a sealing ring 50; the expansion nail is characterized in that a nail cap 11 is arranged above the expansion nail 10, a cross groove 12 is arranged in the middle of the nail cap 11, and a glue injection inlet 13 is arranged at the bottom of the cross groove 12; the glue injection inlet 13 is communicated with a channel 14 in the middle of the expansion nail 10, and an upper outlet 15 and a lower outlet 16 which are arranged in the middle and below the expansion nail 10 are communicated with the channel 14 in the middle of the expansion nail 10; the lower end of the expansion nail 10 is provided with a thread head 17; the hardness of the expansion nail 10 is greater than that of the sleeve 20; an inner cavity 21 is arranged in the middle of the sleeve 20, at least two slots 22 are formed in the lower end of the sleeve 20, the lower portion of the sleeve 20 is divided into a plurality of barb strips 24, a convex block 23 is arranged in the middle of the inner face of each barb strip 24, and hook teeth are arranged on the outer face of each barb strip; the limiting seat 30 is fixed at the upper end of the sleeve 20, a groove 31 is arranged in the middle of the limiting seat 30, through holes 32 are arranged at two ends of the limiting seat 30, and limiting teeth 33 are arranged below the limiting seat 30; two ends of the U-shaped ring 40 are arranged to be folded into the elbow 41; the bending head 41 is inserted in the through hole 32; the sealing ring 50 is sleeved on the expansion nail 10.
2. An expansion bolt capable of injecting glue into the bolt as claimed in claim 1, wherein said sealing ring 50 is made of rubber, and the hardness of the sealing ring 50 is shore a 50.
3. An expandable screw bolt with glue injection thereinto according to claim 1, wherein the cross recess 12 is capable of being matched with a cross head of a cross screwdriver.
4. An expandable bolt injected with glue into the bolt as claimed in claim 1, wherein the diameter of said nut 11 is smaller than the diameter of said recess 31.
5. An expansion bolt capable of injecting glue into bolt according to claim 1, characterized in that when the head 17 below the expansion nail 10 forcibly presses the projection 23, the barb strip 24 is forced to turn outwards.
6. An expandable bolt for injecting glue into the bolt as claimed in claim 1, wherein the nut 11 drives the screw head 17 to force the protrusion 23 downward, so as to compress the sealing ring 50 and fix the sealing ring 50 on the top end of the sleeve 20, and the cross screwdriver is inserted into the cross slot 12 to rotate, so as to adjust the pressure of the nut 11 to compress the sealing ring 50.
7. An expansion bolt capable of injecting glue into the bolt as claimed in claim 1, wherein when the adjusting nut 11 presses the sealing ring 50 until the air in the sleeve 20 can not enter or exit from any part of the sealing ring 50, an injection needle with a diameter of 1.2 mm is inserted into the injection inlet 13, and the glue is injected into the expansion bolt 10, and the glue flows out from the upper outlet 15 through the channel 14 to fill the inner cavity 21 and flows out from the slot 22 and the lower outlet 16 to fill the gap between the expansion bolt and the wall material.
8. An expansion bolt according to claim 1, wherein the U-shaped ring 40 has a diameter smaller than that of the through hole 32, and an external force not parallel to the center line of the through hole 32 is applied to the U-shaped ring 40, so that the U-shaped ring 40 can rotate around the center line of the through hole 32.
9. A method of using an expandable bolt for injecting glue into a bolt as claimed in any one of claims 1 to 8, the method including the steps of:
1) preparing an electric hammer, and installing an electric hammer drill bit with the diameter being about 1 mm larger than the diameter of the sleeve 20;
2) a hole is drilled in the wall body, and the depth dimension of the hole is larger than the length dimension of the sleeve 20;
3) inserting the sleeve 20 into the hole, and embedding the limiting teeth 33 on the sleeve 20 into the wall;
4) inserting the screw head 17 into the sleeve 20, striking the nail cap 11, and enabling the screw head 17 to extrude the bump 23 until the screw head 17 extrudes the bump 23 to be turned outwards, so that the bump 23 is tightly attached to the wall of the hole;
5) a cross screwdriver is inserted into the cross groove 12 to rotate, the pressure of the screw cap 11 on the sealing ring 50 is adjusted until the screw cap 11 extrudes the sealing ring 50 to seal the upper port of the sleeve 20;
6) selecting slow-drying type super glue capable of penetrating into the foam brick, installing an injection needle with the diameter matched with the glue injection inlet 13 at the mouth of the glue bottle, inserting the injection needle into the glue injection inlet 13, and injecting the slow-drying type super glue into the expansion nail 10;
7) filling slow-dry type super glue in the expansion nail 10 and the sleeve 20, and leading the slow-dry type super glue to permeate into the wall material towards the outside of the sleeve 20;
8) stopping injecting glue when slow-dry type super glue overflows between the hole in the wall body and the expansion nail 10;
9) and putting the glue into normal use after the glue is solidified.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110815114.1A CN113417918A (en) | 2021-07-19 | 2021-07-19 | Expansion bolt capable of injecting glue into bolt and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110815114.1A CN113417918A (en) | 2021-07-19 | 2021-07-19 | Expansion bolt capable of injecting glue into bolt and using method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113417918A true CN113417918A (en) | 2021-09-21 |
Family
ID=77721308
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110815114.1A Pending CN113417918A (en) | 2021-07-19 | 2021-07-19 | Expansion bolt capable of injecting glue into bolt and using method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113417918A (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1229257A2 (en) * | 2001-02-02 | 2002-08-07 | Kamax-Werke Rudolf Kellermann GmbH & Co. KG | Mounting device made of a part to be mounted and at least one screw |
| DE102006049952A1 (en) * | 2006-10-19 | 2008-04-24 | Zimmer, Günther | Dowel for cover plate rear handle and cover plate spreading |
| CN203009502U (en) * | 2013-01-10 | 2013-06-19 | 聂曙光 | Expansion bolt |
| CN204403088U (en) * | 2015-01-23 | 2015-06-17 | 中国十九冶集团有限公司 | Carry the EXPANSION ANCHOR BOLTS of glue |
| EP3193011A1 (en) * | 2016-01-15 | 2017-07-19 | Senvion GmbH | Method for producing a flange connection, use, flange connection and wind turbine |
| CN207122476U (en) * | 2017-05-09 | 2018-03-20 | 楼惠娟 | One kind can injecting glue antiseep swell fixture |
| CN207161490U (en) * | 2017-09-06 | 2018-03-30 | 王星宇 | A kind of swell fixture |
| CN207393682U (en) * | 2017-06-30 | 2018-05-22 | 江苏迎燕紧固系统科技有限公司 | A kind of injecting glue type screw |
| CN208040866U (en) * | 2018-04-16 | 2018-11-02 | 宁波世裕五金电器有限公司 | A kind of stable type swell fixture |
| CN211474616U (en) * | 2019-12-26 | 2020-09-11 | 南京扬子混凝土制品有限责任公司 | Screw rod type expansion bolt for concrete |
| CN212055417U (en) * | 2019-12-28 | 2020-12-01 | 宁波安旺特种紧固件有限公司 | Expansion screw for car-repairing gecko |
-
2021
- 2021-07-19 CN CN202110815114.1A patent/CN113417918A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1229257A2 (en) * | 2001-02-02 | 2002-08-07 | Kamax-Werke Rudolf Kellermann GmbH & Co. KG | Mounting device made of a part to be mounted and at least one screw |
| DE102006049952A1 (en) * | 2006-10-19 | 2008-04-24 | Zimmer, Günther | Dowel for cover plate rear handle and cover plate spreading |
| CN203009502U (en) * | 2013-01-10 | 2013-06-19 | 聂曙光 | Expansion bolt |
| CN204403088U (en) * | 2015-01-23 | 2015-06-17 | 中国十九冶集团有限公司 | Carry the EXPANSION ANCHOR BOLTS of glue |
| EP3193011A1 (en) * | 2016-01-15 | 2017-07-19 | Senvion GmbH | Method for producing a flange connection, use, flange connection and wind turbine |
| CN207122476U (en) * | 2017-05-09 | 2018-03-20 | 楼惠娟 | One kind can injecting glue antiseep swell fixture |
| CN207393682U (en) * | 2017-06-30 | 2018-05-22 | 江苏迎燕紧固系统科技有限公司 | A kind of injecting glue type screw |
| CN207161490U (en) * | 2017-09-06 | 2018-03-30 | 王星宇 | A kind of swell fixture |
| CN208040866U (en) * | 2018-04-16 | 2018-11-02 | 宁波世裕五金电器有限公司 | A kind of stable type swell fixture |
| CN211474616U (en) * | 2019-12-26 | 2020-09-11 | 南京扬子混凝土制品有限责任公司 | Screw rod type expansion bolt for concrete |
| CN212055417U (en) * | 2019-12-28 | 2020-12-01 | 宁波安旺特种紧固件有限公司 | Expansion screw for car-repairing gecko |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20210921 |
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| WD01 | Invention patent application deemed withdrawn after publication |