CN211341188U - A pre-buried fixed knot constructs for precast concrete component button head hangs nail - Google Patents
A pre-buried fixed knot constructs for precast concrete component button head hangs nail Download PDFInfo
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- CN211341188U CN211341188U CN201921377679.0U CN201921377679U CN211341188U CN 211341188 U CN211341188 U CN 211341188U CN 201921377679 U CN201921377679 U CN 201921377679U CN 211341188 U CN211341188 U CN 211341188U
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Abstract
The utility model is used for pre-buried fixed knot of precast concrete component button head hanging nail constructs, the rubber mandrel passes through sucking disc seat fixed connection magnetic chuck, the magnetic chuck passes through magnetism actuation and the installation of casting die plate cooperation location, need not punch on casting die utensil, it is spacing to provide the axial for the button head hanging nail through the retaining ring, erection joint convenient operation, can pull out the rubber mandrel simultaneously through the operation hole of demolishing mould during dismantlement, the rubber mandrel, the retaining ring, the sucking disc seat, the magnetic chuck can not damage the deformation, can reuse, and service life is prolonged, the location installation is rapid, the drawing of patterns is convenient, can improve production efficiency, and equipment cost is saved.
Description
Technical Field
The invention relates to a pre-embedded fixing structure for a round-head hanging nail of a precast concrete member.
Background
The precast concrete component is a concrete block for building poured in a reusable steel mould, the concrete block is generally cured and molded in a controllable environment (an industrial factory building) in advance, and then is transported to a building site and hoisted to a specified position, for hoisting convenience, round-headed hoisting nails are pre-embedded in the precast concrete component as hoisting points for hoisting according to the shape, size and quality of the precast concrete component, and the circular hoisting nails are matched with a hoisting tool for use, so that the production process of the component can be simplified, the hoisting construction is convenient, the operation time of workers is shortest, and the safety coefficient of the precast concrete component in the production and transportation processes is ensured; in the pouring process, the head of a round head hanging nail needs to be hung through a rubber core mould capsule, a screw rod and a nut which are arranged in the rubber core mould are matched on a template to fix the position of the hanging nail, a hanging operation space is reserved after a component is solidified and formed, so that a hanging tool and the hanging nail are matched and assembled to complete the hanging work, the nut needs to be firstly removed and then the component is demoulded when the component is demoulded, the rubber core mould needs to be taken out from the component by adopting a special tool after the demould, the rubber core mould is generally taken out after the rubber core mould is extruded by force when the traditional pouring mould is taken out, time and labor are wasted, the rubber core mould is easy to tear, the rubber core mould of the pouring mould is damaged and scrapp.
Disclosure of Invention
The invention aims to solve the technical problem of providing an embedded fixing structure for a round-head hanging nail of a precast concrete member, which has the advantages of rapid positioning and installation, convenient demoulding, repeated use, improved production efficiency and saved equipment cost.
The invention discloses an embedded fixing structure for a round-head hanging nail of a precast concrete member, which is characterized in that: the rubber core mold is formed by combining a sucker seat at the lower part and an upper mold block fixedly connected above the sucker seat, and the outer side surface of the sucker seat and the outer surface of the upper mold block are combined to form a semicircular spherical surface; the middle part of the upper module is provided with a through hole which penetrates up and down and has a diameter larger than the diameter of the end part of the round-head hanging nail to form an inner mold hole which can accommodate the end part of the round-head hanging nail, the inner mold hole is provided with an open annular check ring in a space above the end part of the round-head hanging nail, the check ring is made of elastic material, the inner side surface and the outer side surface of the check ring are planes in the vertical direction, the bottom surface is a concave conical surface which is adaptive to the upper surface of the end part of the round-head hanging nail, the top surface is a spherical surface adaptive to the outer surface of the upper module, the inner diameter of the; a magnetic suction disc which can be positioned and adsorbed on the pouring template is arranged in the sucker seat, a mould removing operation hole is formed in the central position of the sucker seat, and the diameter of the mould removing operation hole is smaller than that of the end part of the round-head hanging nail;
the sucker seat comprises an outer base and a steel seat, the outer base is of a circular structure which vertically penetrates through a hollow inner cavity, the inner wall of the outer base is provided with a limiting step, the steel seat is installed on the upper part of the inner cavity of the outer base in a matched mode through the limiting step, the magnetic sucker is installed on the lower part of the inner cavity of the outer base in a matched mode, and the magnetic sucker is fixedly connected to the steel seat through a screw; the magnetic suction disc is of a disc-shaped structure, a plurality of circular through holes are uniformly formed in the magnetic suction disc along the circumferential direction, and a columnar strong magnet is arranged in each circular through hole;
a through hole which penetrates through the magnetic chuck up and down is formed in the center of the magnetic chuck, and a threaded hole which penetrates through the steel seat up and down is formed in the center of the steel seat to form a mold stripping operation hole;
the outer base is provided with a clamping jaw vertically and upwardly extending from the top surface of the outer base, the bottom surface of the upper module is provided with an inward concave clamping groove, and the outer base is fixedly clamped with the clamping groove of the upper module through the clamping jaw in a matching manner;
three circular through holes are uniformly formed in the magnetic suction disc along the circumferential direction, three columnar strong magnets are arranged in the three circular through holes, and the three columnar strong magnets are fixed on the magnetic suction disc through encapsulation; three counter bores are arranged among the three circular through holes at intervals, and the magnetic suction disc is fixedly connected with the steel seat through three screws;
the upper module is of a semi-spherical structure made of rubber materials, the steel sucker seat is embedded in the upper module, a threaded connecting hole which penetrates through the sucker seat from top to bottom is formed in the center of the sucker seat, and the lower end of the threaded connecting hole extends downwards to the bottom surface of the upper module to form a mould removal operating hole; three counter bores are uniformly arranged in the circumferential direction of the lower surface of the sucker seat, through holes are respectively formed in the positions, corresponding to the three counter bores, of the bottom surface of the upper module, and columnar strong magnets extending into the through holes in the bottom surface of the upper module are respectively arranged in each counter bore to form a magnetic sucker;
the upper module is of a semi-spherical structure made of rubber materials, the sucker seat is of a steel disc-shaped structure, a limiting boss extending outwards is arranged at the top end of the sucker seat, the sucker seat is embedded in the upper module through the limiting boss, and the lower surface of the sucker seat and the lower surface of the upper module are located in the same horizontal plane; the lower part of the sucker seat is provided with an annular limiting groove which is inwards sunken from the lower surface of the sucker seat, and an annular strong magnet is arranged in the annular limiting groove in a matching way to form a magnetic sucker; a threaded connecting hole which penetrates through the sucker seat from top to bottom is formed in the center of the sucker seat, and the lower end of the threaded connecting hole extends downwards to the bottom surface of the upper module to form a mould removing operation hole;
the strong magnet material is a Ru ferroboron magnet, and the sucker seat material is Q235A;
the width of the opening part of the retainer ring along the circumferential direction is not less than the diameter of the rod part of the round-head hanging nail, and the retainer ring is made of rubber.
The pre-buried fixed structure for the round-head hanging nail of the precast concrete component is characterized in that a rubber core mold is fixedly connected with a magnetic chuck through a chuck seat, the magnetic chuck is matched with a casting template through magnetic attraction force to be positioned and installed, holes do not need to be formed in the casting mold, axial limiting is provided for the round-head hanging nail through a retaining ring, the mounting and connecting operation is convenient, the rubber core mold can be simultaneously pulled out through a mold removing operation hole during dismounting, the rubber core mold, the retaining ring, the chuck seat and the magnetic chuck cannot be damaged and deformed, the rubber core mold, the retaining ring, the chuck seat and the magnetic chuck can be repeatedly utilized, the service life is prolonged, the positioning and installation are rapid, the.
Drawings
FIG. 1 is a schematic plan view of a pre-buried fixing structure for a round-headed suspension nail of a precast concrete member according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is a top view of FIG. 1;
FIG. 4 is a bottom view of FIG. 1;
FIG. 5 is an enlarged schematic cross-sectional view of a retainer ring of a pre-buried fixing structure for a round-headed suspension nail of a precast concrete member according to an embodiment of the present invention;
FIG. 6 is a top view of FIG. 5;
FIG. 7 is a bottom view of FIG. 5;
FIG. 8 is a schematic plane structure view of a form removal handle used with a pre-embedded fixing structure for a round-headed suspension nail of a precast concrete member according to an embodiment of the present invention;
FIG. 9 is a top view of FIG. 8;
FIG. 10 shows a pre-buried fixing structure for a round-headed hanging nail of a precast concrete member according to an embodiment of the present invention;
FIG. 11 is a cross-sectional view A-A of FIG. 10;
FIG. 12 is a top view of FIG. 10;
FIG. 13 is a bottom view of FIG. 10;
FIG. 14 shows a pre-buried fixing structure for a round-headed hanging nail of a precast concrete member according to the embodiment of the present invention;
FIG. 15 is a cross-sectional view A-A of FIG. 14;
FIG. 16 is a top view of FIG. 14;
fig. 17 is a bottom view of fig. 14.
Detailed Description
As shown in the figure, a pre-buried fixed knot who is used for precast concrete component button head to hang nail constructs specifically has three kinds of embodiments, respectively as follows:
the first embodiment is as follows: the semi-spherical rubber core mold is formed by combining a sucker seat at the lower part and an upper module 3 fixedly connected above the sucker seat, the outer side surface of the sucker seat is a section of arc-shaped spherical surface, the outer surface of the upper module is a poor arc-shaped spherical surface, and the outer side surface of the sucker seat and the outer surface of the upper module are combined to form a semi-spherical surface; the magnetic chuck 5 which can be positioned and adsorbed on the pouring template is fixedly arranged in the sucker seat, after the upper module is fixedly connected with the sucker seat, the rubber core mould is directly buckled to a design required position for pouring the steel mould of the precast concrete component, and the positioning, adsorption and fixation are realized through the magnetic chuck 5, so that the punching and fixed installation on the mould are not needed, the integral structure of the mould is not damaged, the stress concentration is avoided, the integral performance of the mould is not influenced, the mould manufacturing process is simplified, and the mould manufacturing cost is reduced;
a vertical through hole which penetrates through the center part of the upper module up and down and has a diameter larger than that of the end part of the round-head hanging nail is arranged to form an inner mold hole 11 which can accommodate the end part of the round-head hanging nail, and an open circular ring-shaped check ring 2 is arranged in a space of the inner mold hole 11 above the end part of the round-head hanging nail; a mould removing operation hole 8 is arranged at the center of the sucker seat, the diameter of the mould removing operation hole is smaller than that of the end part of the round-head hanging nail, and the round-head hanging nail is inserted into the inner mould hole of the upper module from top to bottom and then limited in the upper direction and the lower direction by the retainer ring 2 and the sucker seat;
when the precast concrete member is demolded after being poured, the rubber core mold is separated from the mold together with the precast concrete member, and then the rubber core mold is integrally disassembled and pulled out from the precast concrete member after being poured through the fixed connection of the threaded end of the demolition handle 12 and the demolition operation hole;
the material of the retainer ring 2 is elastic material, the inner side surface and the outer side surface of the retainer ring 2 are planes in the vertical direction, the bottom surface is a concave conical surface matched with the upper surface of the end part of the round-head hanging nail, the top surface is a spherical surface matched with the outer surface of the upper module, the inner diameter of the retainer ring 2 is in interference fit with the rod part of the round-head hanging nail, the outer diameter of the retainer ring 2 is also in interference fit with the inner mold hole, after the round-head hanging nail is inserted into the inner mold hole of the upper module from top to bottom, the elastic retainer ring 2 is sleeved on the rod part of the round-head hanging nail from the opening part and is tightly sealed in a gap between the rod part of the round-head hanging nail and the inner mold hole of; the retaining ring 2 is sealed to be sheltered from in the tip top that the nail was hung to the button head, provides the button head and hangs the axial of nail spacing, prevents simultaneously to leak, and retaining ring 2 is because need seal in the centre form downthehole, therefore can borrow the instrument during the assembly and strike inside entering centre form hole.
According to the embedded fixing structure of the round-head hanging nail, the sucker seat comprises an outer base 6 and a steel seat 4, the outer base 6 is of a circular structure which penetrates through a hollow inner cavity up and down, the inner diameter of the upper section of the hollow inner cavity of the outer base 6 is larger than that of the lower section of the hollow inner cavity of the outer base, so that the middle part of the inner wall of the hollow inner cavity of the outer base 6 forms a limiting step structure, the steel seat 4 is installed on the upper part of the inner cavity of the outer base in a matched mode through a limiting step, the magnetic sucker 10 is installed on the lower part of the inner cavity of the; the magnetic suction disc 10 is of a disc-shaped structure, a plurality of circular through holes are uniformly formed in the magnetic suction disc 10 along the circumferential direction, and a columnar strong magnet 5 is arranged in each circular through hole;
furthermore, a through hole 8 which penetrates through the magnetic chuck 10 up and down is formed in the center of the magnetic chuck, a threaded hole 9 which penetrates through the steel seat 4 up and down is formed in the center of the steel seat, the diameter of the through hole 8 is larger than the maximum diameter of the threaded hole 9, a mold removal operation hole is formed, and a mold removal handle is matched and fixedly connected with the threaded hole 9 after penetrating through the through hole 8 through a threaded end, so that the operation is convenient;
furthermore, clamping claws extending vertically and upwards from the top surface of the outer base are respectively arranged on two sides above the outer base, an inwards-concave clamping groove is formed in the bottom surface of the upper module, and the outer base is fixedly clamped with the clamping groove of the upper module in a matched mode through the clamping claws, so that the connection is reliable;
in the specific structure, three circular through holes are uniformly formed in the magnetic chuck 10 along the circumferential direction, three columnar strong magnets 5 are arranged in the three circular through holes, and the three columnar strong magnets 5 are fixed on the magnetic chuck through encapsulation to form an integral magnetic chuck structure; three counter bores are arranged among the three circular through holes at intervals, and the magnetic suction disc 10 is fixedly connected with the steel seat 4 through three screws 7; the lower surface of the magnetic suction disc 10 is on the same horizontal plane with the lower surface of the outer base 6.
The strong magnet material is Ru ferroboron magnet, the sucker seat material is Q235A, and the magnetic attraction force attraction is reliable.
The width of the opening part of the retainer ring 2 along the circumferential direction is not less than the diameter of the rod part of the round-head hanging nail, the retainer ring is conveniently clamped on the rod part of the round-head hanging nail in a matching manner, the retainer ring is made of rubber, and the retainer ring is convenient to install, disassemble and operate, cannot deform and is long in service life.
The round-head hanging nail fixing device consisting of a magnetic chuck, a steel seat, an outer base, an upper module, a check ring, a screw and a round-head hanging nail is adsorbed at a design required position in the die; during installation, a screw is screwed into the steel seat to fix the magnetic suction disc and the outer base to form a suction disc base, the upper module is clamped and buckled on the suction disc base, and a round head hanging nail and a retaining ring are placed in an inner hole of the upper module to form a round head hanging nail fixing device.
In the round-head hanging nail embedded fixing structure of the second embodiment of the invention, the upper module 31 is directly set to be a semi-spherical structure made of rubber materials, the steel sucker seat 41 is embedded in the upper module 31, the center of the sucker seat 41 is provided with a threaded connecting hole 91 which penetrates up and down, and the lower end of the threaded connecting hole 91 extends downwards to the bottom surface of the upper module 31 to form a mould removing operation hole; three counter bores are uniformly formed in the lower surface of the sucker seat 41 along the circumferential direction, through holes are formed in the positions, corresponding to the three counter bores, on the bottom surface of the upper module 31 respectively, and a columnar strong magnet 5 extending into each counter bore from the through hole in the bottom surface of the upper module is arranged in each counter bore respectively to form a magnetic sucker structure; the form removal handle is directly matched and fixedly connected with the threaded connecting hole 91 through the threaded end, so that the operation is convenient;
in the third embodiment of the invention, the round-head hanging nail embedded fixing structure,
the upper module 32 is also directly arranged to be a rubber material semi-spherical structure, the suction cup seat 42 is a steel disc-shaped structure, the top end of the suction cup seat 42 is provided with an outwardly extending annular limiting boss, the suction cup seat 42 is embedded in the upper module 32 through the limiting boss, and the lower surface of the suction cup seat 42 and the lower surface of the upper module 32 are located in the same horizontal plane; the lower part of the sucker seat 42 is provided with a circular limiting groove which is inwards sunken from the lower surface of the sucker seat, and a circular strong magnet 52 is arranged in the circular limiting groove in a matching way to form a magnetic sucker; a threaded connecting hole 92 penetrating up and down is arranged at the center of the sucker seat 42, and the lower end of the threaded connecting hole 92 extends downwards to the bottom surface of the upper module 32 to form a mould removing operation hole; the form removal handle is directly matched and fixedly connected with the threaded connecting hole 92 through the threaded end, so that the operation is convenient;
according to the pre-buried fixed structure of the round-head hanging nail, the rubber core mold is fixedly connected with the magnetic suction disc through the base, the magnetic suction disc is matched with the casting template through magnetic attraction force and is positioned and installed, then the magnetic suction disc is fixedly connected with the casting template through the threaded connection hole in the base, holes are not needed to be formed in the casting mold, the round-head hanging nail is axially limited through the retaining ring, the installing and connecting operation is convenient, the magnetic suction disc, the base, the rubber core mold and the retaining ring can be sequentially taken out from outside to inside by loosening screws during disassembly, the rubber core mold, the retaining ring, the base and the magnetic suction disc cannot be damaged and deformed, the round-head hanging nail can be recycled, the service life is prolonged, the positioning.
The specific technical scheme is as follows: the round-head hanging nail pre-embedding fixing structure is simple in structure, convenient to use and capable of being repeatedly used.
The round-head hanging nail embedded fixing structure comprises a magnetic chuck, a steel base, an outer base, a rubber core mold, a check ring, a screw and a round-head hanging nail, and the round-head hanging nail fixing device is adsorbed to a design requirement position in a mold.
The round head hanging nail fixing device comprises the following steps: screwing a screw into the steel seat to fix the magnetic suction disc and the outer base to form a suction disc base, then buckling the upper module on the suction disc base, and putting a round head hanging nail and a check ring into an inner die hole of the upper module to form a round head hanging nail fixing device.
The magnetic chuck is a disc, three columnar strong magnets are uniformly distributed on the circumference, the outer part of the magnetic chuck is encapsulated and fixed, three counter bores are formed in the magnetic chuck, and a through hole is formed in the middle of the magnetic chuck.
The steel seat is made of steel, three threaded holes are uniformly distributed on the circle, and a threaded hole is formed in the middle of the steel seat; the retainer ring is circular, and one side is open.
Compared with the prior art, the invention has the beneficial effects that: the round-head hanging nail fixing technology solves the technical problem of pre-embedding and fixing of the round-head hanging nail, is simple in structure and convenient to use, does not need to punch a hole on a die, reduces the manufacturing cost of the die, is convenient to disassemble, can be repeatedly used, improves the efficiency and reduces the cost.
The round-head hanging nail embedded fixing structure of the second embodiment adopts the upper module to form the fixed sucker seat in an integrated mode, and the retaining ring and the round-head hanging nail form the round-head hanging nail fixing device which is adsorbed at the position required by the design in the mold.
The round head hanging nail fixing device comprises the following steps: and placing the round-head hanging nail into the upper module, and then clamping the hanging nail by the check ring and placing the hanging nail into an inner hole of the fixed sucker seat.
The fixed upper module is hemispherical and is formed by three columnar strong magnets, a sucker seat and an upper module into a whole, and a threaded hole is formed in the middle of the sucker seat.
The pre-buried fixed knot of button head hanging nail of embodiment three adopts last module integrated into one piece fixed sucking disc seat, and retaining ring, hanging nail constitute button head hanging nail fixing device, adsorb the design requirement position in the mould.
The round-head hanging nail fixing device comprises the following combination steps: and placing the round-head hanging nail into the upper module, and clamping the hanging nail by the check ring into an inner hole of the upper module.
The upper module is hemispherical and is composed of a ring-shaped strong magnet, a sucker seat and an upper die, and a threaded hole is formed in the middle of the base.
Claims (9)
1. The utility model provides a pre-buried fixed knot constructs that is used for precast concrete component button head to hang nail which characterized in that: the rubber core mold is formed by combining a sucker seat at the lower part and an upper mold block fixedly connected above the sucker seat, and the outer side surface of the sucker seat and the outer surface of the upper mold block are combined to form a semicircular spherical surface; the middle part of the upper module is provided with a through hole which penetrates up and down and has a diameter larger than the diameter of the end part of the round-head hanging nail to form an inner mold hole which can accommodate the end part of the round-head hanging nail, the inner mold hole is provided with an open annular check ring in a space above the end part of the round-head hanging nail, the check ring is made of elastic material, the inner side surface and the outer side surface of the check ring are planes in the vertical direction, the bottom surface is a concave conical surface which is adaptive to the upper surface of the end part of the round-head hanging nail, the top surface is a spherical surface adaptive to the outer surface of the upper module, the inner diameter of the; the inside magnetic chuck that adsorbs on pouring the template that is provided with enough location of sucking disc seat, sucking disc seat central point puts and is provided with the operation hole of demolising.
2. The pre-buried fixed knot who is used for precast concrete component button head to hang nail constructs according to claim 1 characterized in that: the sucker seat comprises an outer base and a steel seat, the outer base is of a circular structure which vertically penetrates through a hollow inner cavity, the inner wall of the outer base is provided with a limiting step, the steel seat is installed on the upper part of the inner cavity of the outer base in a matched mode through the limiting step, the magnetic sucker is installed on the lower part of the inner cavity of the outer base in a matched mode, and the magnetic sucker is fixedly connected to the steel seat through a screw; the magnetic suction disc is of a disc-shaped structure, a plurality of circular through holes are uniformly formed in the magnetic suction disc along the circumferential direction, and a columnar strong magnet is arranged inside each circular through hole.
3. The pre-buried fixed knot who is used for precast concrete component button head to hang nail constructs according to claim 2 characterized in that: the magnetic chuck central point puts and is provided with the through-hole that runs through from top to bottom, and steel seat central point puts and is provided with the screw hole that runs through from top to bottom, constitutes the operation hole of demolising.
4. The pre-buried fixed knot who is used for precast concrete component button head to hang nail constructs according to claim 2 characterized in that: the outer base is provided with a clamping jaw vertically extending upwards from the top surface of the outer base, the bottom surface of the upper module is provided with an inwards concave clamping groove, and the outer base is fixedly clamped with the clamping groove of the upper module through the clamping jaw in a matched mode.
5. The pre-buried fixed knot who is used for precast concrete component button head to hang nail constructs according to claim 2 characterized in that: three circular through holes are uniformly formed in the magnetic suction disc along the circumferential direction, three columnar strong magnets are arranged in the three circular through holes, and the three columnar strong magnets are fixed on the magnetic suction disc through encapsulation; three counter bores are arranged among the three circular through holes at intervals, and the magnetic suction disc is fixedly connected with the steel seat through three screws.
6. The pre-buried fixed knot who is used for precast concrete component button head to hang nail constructs according to claim 1 characterized in that: the upper module is of a semi-spherical structure made of rubber materials, the steel sucker seat is embedded in the upper module, a threaded connecting hole which penetrates through the sucker seat from top to bottom is formed in the center of the sucker seat, and the lower end of the threaded connecting hole extends downwards to the bottom surface of the upper module to form a mould removal operating hole; the sucking disc seat lower surface circumferencial direction evenly is provided with three counter bore, goes up the module bottom surface and is provided with the through-hole respectively with three counter bore relevant position, is provided with the column strong magnet that stretches into from last module bottom surface through-hole in every counter bore respectively, constitutes the magnetic chuck.
7. The pre-buried fixed knot who is used for precast concrete component button head to hang nail constructs according to claim 1 characterized in that: the upper module is of a semi-spherical structure made of rubber materials, the sucker seat is of a steel disc-shaped structure, a limiting boss extending outwards is arranged at the top end of the sucker seat, the sucker seat is embedded in the upper module through the limiting boss, and the lower surface of the sucker seat and the lower surface of the upper module are located in the same horizontal plane; the lower part of the sucker seat is provided with an annular limiting groove which is inwards sunken from the lower surface of the sucker seat, and an annular strong magnet is arranged in the annular limiting groove in a matching way to form a magnetic sucker; the central position of the sucker seat is provided with a threaded connecting hole which penetrates through the sucker seat from top to bottom, and the lower end of the threaded connecting hole extends downwards to the bottom surface of the upper module to form a form removal operating hole.
8. The pre-buried fixed knot who is used for precast concrete component button head to hang nail constructs according to any one of claim 2 ~ 7, its characterized in that: the strong magnet is made of Ru ferroboron magnet, and the sucker seat is made of Q235A.
9. The pre-buried fixed knot who is used for precast concrete component button head to hang nail constructs according to any one of claim 1 ~ 7, its characterized in that: the width of the opening part of the retainer ring along the circumferential direction is not less than the diameter of the rod part of the round-head hanging nail, and the retainer ring is made of rubber.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921377679.0U CN211341188U (en) | 2019-08-22 | 2019-08-22 | A pre-buried fixed knot constructs for precast concrete component button head hangs nail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921377679.0U CN211341188U (en) | 2019-08-22 | 2019-08-22 | A pre-buried fixed knot constructs for precast concrete component button head hangs nail |
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| Publication Number | Publication Date |
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| CN211341188U true CN211341188U (en) | 2020-08-25 |
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| CN201921377679.0U Active CN211341188U (en) | 2019-08-22 | 2019-08-22 | A pre-buried fixed knot constructs for precast concrete component button head hangs nail |
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| Country | Link |
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| CN (1) | CN211341188U (en) |
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- 2019-08-22 CN CN201921377679.0U patent/CN211341188U/en active Active
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