CN110067802A - Threaded fastener - Google Patents
Threaded fastener Download PDFInfo
- Publication number
- CN110067802A CN110067802A CN201910381837.8A CN201910381837A CN110067802A CN 110067802 A CN110067802 A CN 110067802A CN 201910381837 A CN201910381837 A CN 201910381837A CN 110067802 A CN110067802 A CN 110067802A
- Authority
- CN
- China
- Prior art keywords
- nut
- screw rod
- hole
- injecting glue
- screw thread
- 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 claims abstract description 70
- 238000007789 sealing Methods 0.000 claims description 19
- 230000000903 blocking effect Effects 0.000 claims description 13
- 230000003014 reinforcing effect Effects 0.000 claims description 9
- 229920003023 plastic Polymers 0.000 claims description 5
- 239000004033 plastic Substances 0.000 claims description 5
- 230000007774 longterm Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 10
- 238000010586 diagram Methods 0.000 description 4
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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
- F16B23/00—Specially shaped nuts or heads of bolts or screws for rotations by a tool
- F16B23/0007—Specially shaped nuts or heads of bolts or screws for rotations by a tool characterised by the shape of the recess or the protrusion engaging the tool
- F16B23/0038—Specially shaped nuts or heads of bolts or screws for rotations by a tool characterised by the shape of the recess or the protrusion engaging the tool substantially prismatic with up to six edges, e.g. triangular, square, pentagonal, Allen-type cross-sections
-
- 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
- F16B39/00—Locking of screws, bolts or nuts
- F16B39/02—Locking of screws, bolts or nuts in which the locking takes place after screwing down
- F16B39/021—Locking of screws, bolts or nuts in which the locking takes place after screwing down by injecting a settable material after the screwing down
-
- 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
- F16B41/00—Measures against loss of bolts, nuts, or pins; Measures against unauthorised operation of bolts, nuts or pins
- F16B41/005—Measures against unauthorised operation of bolts, nuts or pins
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Dowels (AREA)
Abstract
The invention discloses a kind of threaded fasteners, it applies in fastener areas, it solves traditional fastener and is being easy the technical issues of loosening after long-term use, its key points of the technical solution are that: the nut being arranged including screw rod and described screw rod one end, the screw rod offer locking external thread far from nut one end；The nut offers blind hole on the end face of screw rod, and the section of the blind hole is polygon；One end that the bottom of the blind hole is directed away from nut is extended with hole for injecting glue, and injecting glue branch hole, the injecting glue Zhi Kongyu hole for injecting glue connection are offered on the screw rod；It further include having nut, the nut is equipped with locking internal screw thread, and the locking internal screw thread and locking external thread cooperate；What is had has the technical effect that hole for injecting glue and injecting glue branch hole can guide glue to enter between locking internal screw thread and locking external thread, so that screw rod and nut can be securely attached to together, so that screw rod and nut will not loosen after long-term use.
Description
Technical field
The present invention relates to fastener areas, in particular to a kind of threaded fastener.
Background technique
Currently, mechanical erection field is larger for the installation requirements amount of structural member connection fastening in civil construction；With regard to mesh
It is to be threadedly engaged to be attached structural member using screw bolt and nut for the preceding fastener generally used.Such connection type
Although can connection member, after long-term use be easy loosen.
Summary of the invention
The object of the present invention is to provide a kind of threaded fasteners, its advantage is that hole for injecting glue and injecting glue branch hole can guide glue
It enters between locking internal screw thread and locking external thread, so that screw rod and nut can be securely attached to together, thus
So that screw rod and nut will not loosen after long-term use.
Above-mentioned technical purpose of the invention has the technical scheme that a kind of threaded fastener, including
The nut of screw rod and the setting of described screw rod one end, the screw rod offer locking external thread far from nut one end；The nut back
From blind hole is offered on the end face of screw rod, the section of the blind hole is polygon；
One end that the bottom of the blind hole is directed away from nut is extended with hole for injecting glue, and injecting glue branch hole, institute are offered on the screw rod
State the connection of injecting glue Zhi Kongyu hole for injecting glue；
It further include having nut, the nut is equipped with locking internal screw thread, and the locking internal screw thread and locking external thread cooperate.
Through the above technical solutions, the locking external thread on screw rod is used for and the locking screw-internal thread fit on nut, nut
It is used to clamp mechanism member with nut；Polygonal blind hole be used for for spanner be inserted into, so as to by screw rod together with nut tightening；Note
It glue hole, can be preferably just by screw rod for guiding glue to enter between screw rod and nut for injecting glue, injecting glue branch hole
Be bonded together with nut so that screw rod connect with nut it is stronger so that screw rod and nut are by structural member
It is not susceptible to loosen after being locked together.
The present invention is further arranged to: the side wall of the blind hole offers clamping groove, is equipped in the blind hole and blocks plug,
The side for blocking plug is equipped with clamping protrusion, and the clamping protrusion is engaged by clamping with clamping groove.
Through the above technical solutions, block plug for blocking blind hole, avoid non-working person using allen wrench with
Meaning screw rod is screwed off so that screw rod connected with nut it is more stable, so as to avoid screw rod and nut loosening；Clamping protrusion
With clamping groove cooperate so that block plug connect with the side wall of blind hole it is stronger.
The present invention is further arranged to: the closure plug is equipped with sealing column, the sealing column towards the end face of hole for injecting glue
It is plugged in hole for injecting glue.
Through the above technical solutions, sealing column increases contact of the sealing column with hole for injecting glue for plugging in hole for injecting glue
Area connect stronger with nut, is more not easy to be pulled out so that blocking plug, further avoid non-working person with
Meaning turn screw rod.
The present invention is further arranged to: the sealing column is equipped with guide surface far from the one end for blocking plug.
It is gradually reduced, makes through the above technical solutions, guide surface makes sealing column be directed away from one end diameter for blocking and filling in
It obtains when sealing column is inserted into hole for injecting glue, guide surface plays preferable guiding function, enables sealing column more accurate
It is inserted into hole for injecting glue；And guide surface increases the contact area with glue, enables glue stronger for sealing column
It is bonded together with hole for injecting glue.
The present invention is further arranged to: the slot bottom of the thread groove of the injecting glue Zhi Kongcong locking external thread prolongs towards hole for injecting glue
It stretches, injecting glue branch hole is uniformly provided at least three along the circumferencial direction of screw rod.
Through the above technical solutions, the slot bottom of the thread groove of injecting glue Zhi Kongcong locking external thread extends to hole for injecting glue, so that
Glue can be entered along injecting glue branch hole between locking external thread and locking internal screw thread, so that screw rod was connect with nut
It is stronger；Injecting glue branch hole is equipped at least three along the circumferencial direction of screw rod, and glue is enabled evenly and rapidly to enter lock
Between tight external screw thread and locking internal screw thread.
The present invention is further arranged to: the screw rod is equipped with conical section, the side of the conical section far from one end of nut
Circular cone external screw thread is offered, the circular cone external screw thread is connect with locking external thread；Conical inner screw thread, institute are offered on the nut
Conical inner screw thread is stated to connect with locking internal screw thread.
Through the above technical solutions, circular cone external screw thread and conical inner screw thread cooperate, so that mutual between screw rod and nut
Projected area of the stress surface of active force on screw rod end face is bigger, thus must screw rod together with nut check when, stress
It is more uniform so that screw rod connect with nut it is stronger, be not easy to loosen.
The present invention is further arranged to: the nut is in a circular table shape, and the orient diameter of the nut towards screw rod gradually becomes
Greatly.
Through the above technical solutions, round table-like nut to increase itself and knot in the case where material therefor is less
The contact area of component, so that nut more stable can be abutted with structural member；And the pulling capacity that screw rod is subject to can
It is decomposed away by nut, avoids screw rod or nut and damaged because stress is excessively concentrated.
The present invention is further arranged to: the nut close to one end of nut be equipped with clamping plate, the clamping plate with it is described
Reinforcing rib is equipped between nut.
Through the above technical solutions, clamping plate is used to that nut to be cooperated to clamp structural member wherein, clamping plate and structural member
Contact area it is larger so that its abutted with structural member it is more stable；Reinforcing rib is for reinforcing between clamping plate and nut
Structural strength so that screw rod and nut mechanism member is locked it is more stable；And reinforcing rib is convenient for using tool by spiral shell
Mother clamps, so that nut is not susceptible to transfer when rotary screw, to easily facilitate screw rod together with nut tightening.
The present invention is further arranged to: the blind hole section is regular hexagon.
Through the above technical solutions, blind hole section is in regular hexagon, to carry out turn to screw rod using allen wrench,
So that rotary screw is more convenient.
The present invention is further arranged to: the closure plug is adopted made of plastic.
Through the above technical solutions, block plug adopt it is made of plastic, plastics have preferable plasticity and elasticity so that envelope
Blocking can be snapped onto preferably in clamping groove and blind hole；And it is subsequent need to screw off screw rod when, heater can be used
Tool or cutter are destroyed plug is blocked, then screw rod is screwed off.
In conclusion the invention has the following advantages:
1. hole for injecting glue is for injecting glue, injecting glue branch hole guidance glue is entered between screw rod and nut, just by screw rod and nut
Be bonded together so that screw rod connect with nut it is stronger so that screw rod together with nut check after be not susceptible to pine
It is dynamic；
2. blocking plug for blocking blind hole, avoids non-working person from arbitrarily unscrewing screw rod using allen wrench, make spiral shell
Bar connects more stable with nut, avoids screw rod and nut loosening.
Detailed description of the invention
Fig. 1 is the whole structural schematic diagram of the present embodiment；
Fig. 2 is the structural schematic diagram of the closure plug of the present embodiment, screw rod and nut decomposing state；
Fig. 3 is the schematic diagram of internal structure of the closure plug of the present embodiment, screw rod and nut；
Fig. 4 is the nut of the present embodiment and the structural schematic diagram of clamping plate connection relationship.
Appended drawing reference: 1, screw rod；2, nut；3, locking external thread；4, blind hole；5, hole for injecting glue；6, injecting glue branch hole；7, spiral shell
It is female；8, internal screw thread is locked；9, clamping groove；10, plug is blocked；11, clamping protrusion；12, sealing column；13, guide surface；14, circular cone
Section；15, circular cone external screw thread；16, conical inner screw thread；17, clamping plate；18, reinforcing rib；19, rub lines.
Specific embodiment
Below in conjunction with attached drawing, invention is further described in detail.
Embodiment:
With reference to Fig. 1 and Fig. 2, a kind of threaded fastener, including screw rod 1 and the nut 2 for being fixed at 1 one end of screw rod, nut 2 is in
Round table-like, the orient diameter of nut 2 towards screw rod 1 becomes larger；The side of the one end of screw rod 1 far from nut 2 offers locking
External screw thread 3, nut 2 offer blind hole 4 away from one end of screw rod 1, and the section of blind hole 4 is in regular hexagon.It further include nut 7, spiral shell
Mother 7 is cylindrical, and locking internal screw thread 8 is offered in the inner hole of nut 7, and locking internal screw thread 8 and locking external thread 3 cooperate.
With reference to Fig. 3, the bottom of blind hole 4 offers hole for injecting glue 5, and hole for injecting glue 5 is arranged along the axis direction of screw rod 1；Screw rod 1
Offer injecting glue branch hole 6 at locking external thread 3, injecting glue branch hole 6 is from the slot bottom of 3 thread groove of locking external thread along the diameter of screw rod 1
Extend to direction, injecting glue branch hole 6 is connected to hole for injecting glue 5, and injecting glue branch hole 6 is uniformly provided with four column along the circumferencial direction of screw rod 1;By spiral shell
After in 1 precession nut 7 of bar, toward the inner injection glue of hole for injecting glue 5, and certain pressure is given, glue enters injecting glue from hole for injecting glue 5
In branch hole 6, then glue is entered in injecting glue branch hole 6, so be flowed into locking external thread 3 and locking internal screw thread 8 between
In gap, locking external thread 3 and locking internal screw thread 8 are bonded together by glue so that screw rod 1 and nut 7 connect it is stronger
It is not easy to loosen.
With reference to Fig. 2, the side wall of blind hole 4 offers clamping groove 9, and clamping groove 9 is hemispherical；It is equipped with and blocks in blind hole 4
Plug 10, the side for blocking plug 10 are fixed with clamping protrusion 11, and clamping protrusion 11 is fastened in clamping groove 9, so that blocking plug 10
It can firmly be tucked into clamping groove 9；It blocks plug 10 and adopts made of plastic, block plug 10 for 4 envelope of blind hole of regular hexagon
It blocks, cannot be arbitrarily inserted into blind hole 4 using allen wrench, avoid non-working person and arbitrarily screw off screw rod 1.
With reference to Fig. 2, blocks plug 10 and be fixed with sealing column 12 towards the side of hole for injecting glue 5, sealing column 12 is inserted into hole for injecting glue 5
In, sealing column 12 is equipped with inclined guide surface 13 far from the one end for blocking plug 10；Guide surface 13 is directed away from sealing column 12
The one end for blocking plug 10 gradually becomes smaller, and guide post can preferably guide sealing column 12 to be inserted into hole for injecting glue 5, so that will
It blocks when plug 10 is tucked into blind hole 4 and is easier；And guide surface 13 increases glue-contact in sealing column 12 and hole for injecting glue 5
Area so that block plug 10 connect with screw rod 1 it is stronger so that block fill in 10 be put into blind hole 4 after be not easy by
It takes out.
With reference to Fig. 3 and Fig. 4, nut 7 is fixed with clamping plate 17 close to one end of nut 2, and clamping plate 17 is in flat disk like,
Clamping plate 17 is equipped with friction lines 19 towards the side of nut 2, and clamping plate 17 increases applying for nut 7 and fixed mechanism member
Power area, friction lines 19 increases the frictional force between clamping plate 17 and mechanism member, so that clamping plate 17 can be more
Firm clamping machine component.Reinforcing rib 18 is equipped between clamping plate 17 and nut 7, reinforcing rib 18 is equal along the circumferencial direction of nut 7
Even array has multiple, and reinforcing rib 18 strengthens the overall structural strength between clamping plate 17 and nut 7, so as to more stable
Mechanism member is fixed；It is formed with rotation stop groove between adjacent said rib 18, rotation stop is inserted into using tool compatible with rotation stop groove
In slot, screw rod 1 is screwed to easily facilitate.
With reference to Fig. 3, screw rod 1 is fixed with conical section 14 far from one end of nut 2, and the side of conical section 14 offers outside circular cone
Screw thread 15, circular cone external screw thread 15 are connect with locking external thread 3；It is offered on nut 7 in the circular cone cooperated with circular cone external screw thread 15
Screw thread 16, conical inner screw thread 16 are connect with locking internal screw thread 8；The cooperation of conical inner screw thread 16 and circular cone external screw thread 15, to make
Screw rod 1 and the mutual interaction force of nut 7 projected area of the face on 1 end face of screw rod it is bigger so that screw rod 1 and spiral shell
Mother 7 connects stronger.
This specific embodiment is only explanation of the invention, is not limitation of the present invention, those skilled in the art
Member can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but as long as at this
All by the protection of Patent Law in the scope of the claims of invention.
Claims (10)
1. a kind of threaded fastener, including the nut (2) that screw rod (1) and the screw rod (1) one end are arranged, the screw rod (1) is remote
Locking external thread (3) are offered from nut (2) one end；
It is characterized in that, the nut (2) offers blind hole (4) on the end face of screw rod (1), the section of the blind hole (4)
For polygon；
One end that the bottom of the blind hole (4) is directed away from nut (2) is extended with hole for injecting glue (5), is offered on the screw rod (1)
Injecting glue branch hole (6), injecting glue branch hole (6) are connected to hole for injecting glue (5)；
It further include having nut (7), the nut (7) is equipped with locking internal screw thread (8), and the locking internal screw thread (8) and locking are outer
Screw thread (3) cooperation.
2. threaded fastener according to claim 1, which is characterized in that it is recessed that the side wall of the blind hole (4) offers clamping
Slot (9) is equipped in the blind hole (4) and blocks plug (10), and the side for blocking plug (10), which is equipped with, is clamped raised (11), the card
Raised (11) and clamping groove (9) are connect to be engaged by clamping.
3. threaded fastener according to claim 2, which is characterized in that the closure fills in (10) towards hole for injecting glue (5)
End face is equipped with sealing column (12), and the sealing column (12) is plugged in hole for injecting glue (5).
4. threaded fastener according to claim 3, which is characterized in that the sealing column (12) is far from closure plug (10)
One end is equipped with guide surface (13).
5. threaded fastener according to claim 1, which is characterized in that injecting glue branch hole (6) is from locking external thread (3)
Thread groove slot bottom towards hole for injecting glue (5) extend, injecting glue branch hole (6) along the circumferencial direction of screw rod (1) be uniformly provided with to
It is three few.
6. threaded fastener according to claim 1, which is characterized in that the screw rod (1) sets far from the one end of nut (2)
Have conical section (14), the side of the conical section (14) offers circular cone external screw thread (15), the circular cone external screw thread (15) and lock
Tight external screw thread (3) connection；
It is offered conical inner screw thread (16) on the nut (7), the conical inner screw thread (16) connect with locking internal screw thread (8).
7. -6 any threaded fastener according to claim 1, which is characterized in that the nut (2) is in a circular table shape, described
The orient diameter of nut (2) towards screw rod (1) becomes larger.
8. -6 any threaded fastener according to claim 1, which is characterized in that the nut (2) is close to nut (2)
One end is equipped with clamping plate (17), is equipped with reinforcing rib (18) between the clamping plate (17) and the nut (2).
9. -6 any threaded fastener according to claim 1, which is characterized in that blind hole (4) section is positive six sides
Shape.
10. threaded fastener according to claim 2, which is characterized in that the closure plug (10) is adopted made of plastic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910381837.8A CN110067802A (en) | 2019-05-08 | 2019-05-08 | Threaded fastener |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910381837.8A CN110067802A (en) | 2019-05-08 | 2019-05-08 | Threaded fastener |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110067802A true CN110067802A (en) | 2019-07-30 |
Family
ID=67370562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910381837.8A Pending CN110067802A (en) | 2019-05-08 | 2019-05-08 | Threaded fastener |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110067802A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110513383A (en) * | 2019-08-29 | 2019-11-29 | 江铃控股有限公司 | A kind of bolt assembly anti-loose method |
| CN112377504A (en) * | 2020-09-16 | 2021-02-19 | 襄阳达安汽车检测中心有限公司 | Screw convenient to assemble and disassemble |
| CN112962884A (en) * | 2021-02-07 | 2021-06-15 | 浙江富成建设集团有限公司 | Fabricated stair structure and construction method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105757099A (en) * | 2016-03-31 | 2016-07-13 | 南通康达鑫电子有限公司 | Improved fastening screw |
| US20160201712A1 (en) * | 2015-01-14 | 2016-07-14 | Dallas Boyd | Fastener for in situ fluid injection |
| CN206320147U (en) * | 2016-12-22 | 2017-07-11 | 海盐宇星螺帽有限责任公司 | A kind of anti-skidding flange nut |
| CN207049166U (en) * | 2017-06-19 | 2018-02-27 | 海盐三鑫机械有限公司 | A kind of screw for being not easy to loosen |
| CN109083910A (en) * | 2018-11-02 | 2018-12-25 | 浙江亦宸五金有限公司 | A kind of antirust tapping screw |
| CN208686767U (en) * | 2018-08-10 | 2019-04-02 | 天津市津卓五金标准件制造有限公司 | A kind of novel antirust screw |
-
2019
- 2019-05-08 CN CN201910381837.8A patent/CN110067802A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160201712A1 (en) * | 2015-01-14 | 2016-07-14 | Dallas Boyd | Fastener for in situ fluid injection |
| CN105757099A (en) * | 2016-03-31 | 2016-07-13 | 南通康达鑫电子有限公司 | Improved fastening screw |
| CN206320147U (en) * | 2016-12-22 | 2017-07-11 | 海盐宇星螺帽有限责任公司 | A kind of anti-skidding flange nut |
| CN207049166U (en) * | 2017-06-19 | 2018-02-27 | 海盐三鑫机械有限公司 | A kind of screw for being not easy to loosen |
| CN208686767U (en) * | 2018-08-10 | 2019-04-02 | 天津市津卓五金标准件制造有限公司 | A kind of novel antirust screw |
| CN109083910A (en) * | 2018-11-02 | 2018-12-25 | 浙江亦宸五金有限公司 | A kind of antirust tapping screw |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110513383A (en) * | 2019-08-29 | 2019-11-29 | 江铃控股有限公司 | A kind of bolt assembly anti-loose method |
| CN112377504A (en) * | 2020-09-16 | 2021-02-19 | 襄阳达安汽车检测中心有限公司 | Screw convenient to assemble and disassemble |
| CN112962884A (en) * | 2021-02-07 | 2021-06-15 | 浙江富成建设集团有限公司 | Fabricated stair structure and construction method thereof |
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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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190730 |