KR102440268B1 - Cast-In-Place Anchors System - Google Patents

Abstract

The present invention relates to a pre-embedded anchor system, and more specifically, to a pre-embedded anchor system, which can be embedded during the construction of a concrete structure to facilitate ease in the installation and construction of a bridge inspection facility. In particular, the present invention relates to a device which is coupled to the inner surface of a mold without penetrating the mold to facilitate ease in temporary installation and dislocation. In addition, the present invention provides a permanent pre-embedding to improve reliability of the coupling with respect to an inspection facility. To this end, the present invention comprises: a panel unit of a flat plate; a plurality of insert units which are fixed after being spaced apart from each other at a predetermined interval within the panel unit; a fastening key which is provided at the panel unit, and is welded to be fastened to a mold when the mold is constructed; a sacrificial member which is fastened to the fastening key, and is plastically deformed when the mold is demolded; a fastening bar which supports one side surface of the sacrificial member, and is coupled to the panel unit; and a fastening unit which pressurizes the other side surface of the sacrificial member at the front end of the fastening bar, and is composed of a fastening bolt which is coupled to the fastening bar.

Description

Pre-buried anchor system {Cast-In-Place Anchors System}

The present invention relates to a pre-burial anchor system, and in detail, a pre-buried anchor system that is embedded and installed when constructing a concrete structure so that the installation and construction of a bridge inspection facility can be made more easily. It relates to a device that is easy to temporarily install and remove, and improves the reliability of the connection to the inspection facility through permanent pre-burial.

Patent Document 001 relates to an embedded anchor and its construction method that are embedded and installed when constructing a concrete structure in order to construct facilities such as an inspection road in a concrete structure, and a breaking ring is inserted so as to be caught on a temporary fixing bolt that is helically coupled to a connection socket. Recessed anchor provided with a form coupling plate, and the form coupling plate is joined to the surface of the metal formwork so that only the connection socket to which the temporary fixing bolt is coupled is embedded in the concrete structure while the form coupling plate is released together when the form is demolded and to a construction method thereof. The embedded anchor of the present invention includes a support plate in which a plurality of socket mounting holes are formed to be spaced apart from each other at intervals set in the horizontal and vertical directions on the surface; a connection socket fitted with each of the socket mounting holes to be horizontally coupled, an inner spiral portion having threads on the entire inner circumferential surface or both sides is formed, and an anchor bolt is coupled to one end to be spirally coupled to the inner spiral portion; A bolt insertion hole is formed in a portion corresponding to the connection socket, and a breaking ring support bracket communicated with each bolt insertion hole and formed at the end is coupled on one side, and is welded to the corresponding surface of the metal formwork during formwork. formwork joining plate; a coupling plate fixing bolt inserted into the other end of the connection socket through the bolt insertion hole and helically coupled to the inner spiral portion; It is inserted into the bolt insertion hole and one edge part is supported by the breaking ring support bracket, and a locking band is formed on one edge to prevent the head part of the coupling plate fixing bolt from being caught and escaped. It is formed so that the locking state is released, and on one side of the inner side, a breaking ring is formed in which the head part guide space is formed with an inner diameter larger than the head part so that the head part comes out when the locking belt is broken.

Patent Document 002 relates to an embedded rotary detachable fixed support device for a bridge inspection facility and a construction method therefor. When it is necessary to change the attachment position of the fixed support with the iron formwork, the strength and weakness of magnetic force can be adjusted through the rotation of the magnet module, so that the operator can correct and conveniently adjust the binding position of the fixed support without difficulty. As a technical means for implementing this, when the concrete is poured on the pier, it is magnetically attached to and fixed to the steel formwork and positioned inside the pier, while the outside is open and the inner side protrudes toward the pier and the sealed magnetic module chamber is formed in a single or multiple support body; It is inserted from the outside open to the magnet module chamber and the central rotational shaft is bound to the outside through the central shaft fastening hole, and the module rotational bolt is fastened from the opposite pier side. A rotation control plate that is moved at intervals while being moved, and a plurality of magnetic binding grooves are formed while being screwed to the outside of the rotation control plate, so that a plurality of permanent magnets exhibiting strong magnetic force are screwed into the magnet binding grooves, respectively, and a bridge; During the installation of the check stand, the bolt means for bolting the fixing bracket, which is the end of the scaffold support, is fastened and protrudes toward the inside of the pier at the position of the bolt fastening hole penetrating through the support body so that it is firmly fixed and supported against the pier cured during concrete pouring. A fixed support that is magnetically attached to the steel form is composed of a bolted rod that is basically included.

Patent Document 003 relates to a method of constructing a bridge inspection facility using a pre-buried anchor. During the construction of the bridge inspection facility, the anchor panel is pre-installed in the pier in the buried form, so that the fixed installation work of the inspection passage bracket is more efficient. in order to make it happen. The construction method of the present invention for realizing this includes a formwork installation step of installing the formwork on the upper part of the pier; An anchor panel installation step of attaching and installing an anchor panel having a plurality of bolt holes formed on the inner wall surface of the formwork; coupling an anchor coupler of a certain length to the anchor panel, the anchor coupler fastening step in which a support rod is connected to the rear end of the anchor coupler; a rebar welding step of welding and fixing reinforcing bars to the support bar; a concrete pouring step of pouring concrete into the formwork; a formwork removal step of removing the formwork after curing the poured concrete to expose the anchor panel; and an inspection passage installation step of bolting the inspection passage bracket to the exposed anchor panel.

Patent Document 004 discloses a circular tube body embedded in concrete, a pre-installed anchor coupler in which an inner screw part is formed and a plurality of outer locking rings are protruded from the outer surface; A bolt to be embedded in concrete, located on the rear side of the pre-installed anchor coupler, a fastening screw part screwed to the rear inner screw part is formed on one outer periphery, and a bolt fastening hole having an inner thread is formed in the center of one front end surface. and a stud bolt having a bolt head formed at the other end; A bolt head is formed at one end, a bolt through hole formed inwardly in the center of the front end of the bolt head is formed, a bolt head insertion hole having a diameter larger than that of the bolt through hole is formed at one end of the bolt through hole, and the pre-installed anchor is at the outer periphery of the other side. An anchor bolt having an outer screw portion screwed to the inner screw portion of the coupler is formed; and a long bolt inserted into the bolt through hole of the anchor bolt. At one end, a locking head is formed to be inserted into the bolt head insertion hole and fixed, and a tool insertion groove is formed on the front end surface of the locking head to insert and lock a tool. and the bolt leg part protrudes to the outside through the bolt through hole, and on the outer periphery of the other end, a fastening screw part screwed to the bolt fastening hole thread of the stud bolt is formed. It's about bolts. This invention is a concrete buried space, but the anchor bolt fastened through the pre-installed anchor coupler and the stud bolt inserted in advance when the concrete is buried. It works.

US 10-2002879 B1 (registration date July 23, 2019) US 10-2077307 B1 (registration date February 07, 2020) US 10-2181972 B1 (registration date November 17, 2020) US 10-2236908 B1 (registration date March 31, 2021)

In general, in operating structures constituting social infrastructure such as bridges, in order to inspect the public state, it is essential to install an inspection facility for the inspector to access the location where inspection is required. Conventionally, after forming a structure such as a bridge, after forming an anchor groove in the structure, the anchor is mechanically inserted and fastened, or the anchor hole is filled with a chemical material such as epoxy to fix the anchor, and a facility for inspection has been installed. This post-construction method cannot secure the reliability of structural and chemical bonding with the material of the applied structure, and the workability for forming anchor holes in the concrete structure after curing is very poor. The fall accident caused by the dropout of the inspection equipment during the operator's inspection has caused numerous casualties and is still ongoing. In order to solve this problem, pre-buried anchors have been developed and used in part, in which the anchors are buried in advance before the structure is formed. There has been a problem in that the formwork needs to be repaired after demolding. In order to solve this problem, the present invention intends to propose a pre-embedded anchor system located on the inner surface of the form, without passing through the form.

The present invention relates to a pre-buried anchor system, and specifically, a panel part of a flat plate and a plurality of insert parts fixed at a predetermined distance from each other in the panel part and the panel part are provided, and are welded to the formwork during formwork construction. A sacrificial member constrained by a fastening key and the fastening key, and supporting one side of the sacrificial member and plastically deformed when the mold is demolded, and a fastening bar coupled to the panel portion, and the other side of the sacrificial member at the tip of the fastening bar and a fastening part made of a fastening bolt which is pressed and is engaged with the fastening bar.

The present invention relates to a pre-buried anchor system, and in the present invention presented above, the panel part comprises a steel plate.

The present invention relates to a pre-embedded anchor system, and in the invention presented above, the insert includes forming a side cross-section in one or more sections on the outer surface.

The present invention relates to a pre-embedded anchor system, and in the invention presented above, the side cross-section includes a cross-section that is enlarged than the outer surface of the insert.

The present invention relates to a pre-embedded anchor system, and in the invention presented above, the end of the insert includes a bolt extending.

The present invention relates to a pre-embedded anchor system, and in the invention presented above, the length of the plurality of insert parts includes that the length of the insert part installed on the upper part is formed longer than the length of the insert part installed on the lower part.

The present invention relates to a pre-embedded anchor system, and in the invention presented above, the fastening bar includes a coupling of the fastening key and a cover member surrounding the sacrificial member.

The present invention relates to a pre-embedded anchor system, and in the invention presented above, the fastening key includes one or more welding grooves on the outer surface.

The present invention relates to a pre-embedded anchor system, and in the invention presented above, the sacrificial member interferes with the fastening key, is bound to the fastening bar with the fastening bolt, and is plastically deformed under a certain load to be separated from the fastening key. include being

The present invention relates to a pre-buried anchor system, and in the invention presented above, the fastening key is demolded together with the formwork after concrete pouring and curing, and the sacrificial member is embedded in the fastening key while plastically deformed during demolding. include

By utilizing the pre-buried anchor system of the present invention, it is possible to secure the reliability of the installation of the inspection facility to be connected, and it is possible to install it at an appropriate location necessary without considering the shape of the formwork, so there is an effect of shaping the efficiency during construction, and the formwork It is possible to minimize the damage to the form after demolding, thereby securing the economic effect of improving the service life of the form.

1 is an exploded view of the pre-embedded anchor system of the present invention.
Figure 2 is a perspective view of the pre-embedded anchor system of the present invention.
Figure 3 is a cross-sectional view of the pre-buried anchor system of the present invention.
Figure 4 is a cross-sectional view of the embedded anchor system of the present invention.
Figure 5 (a), (b), (C) is a plan view of the sacrificial member of the present invention.

Hereinafter, the most preferred embodiment of the present invention will be described in detail in order to explain in detail enough that a person of ordinary skill in the art can easily carry out the present invention. Citation relationships in the following examples are merely numbers presented to aid technical understanding, and other non-quoted examples may be cited. Even a configuration not specified in the following embodiments may be substituted with a target exhibiting a similar purpose and effect. A sub-concept configuration not specified in the following embodiments is considered to be specified.

[Embodiment 1-1] The present invention relates to a pre-buried anchor system, and specifically, a panel part of a flat plate and a plurality of insert parts fixed at a predetermined distance from each other in the panel part and the panel part are provided, and the formwork A fastening key that is welded to the formwork during construction and a fastening bar that is bound to the fastening key, supports a sacrificial member that is plastically deformed when the form is demolded, and one side of the sacrificial member, and is coupled to the panel, and a tip of the fastening bar In pressing the other side of the sacrificial member, and includes a fastening portion consisting of a fastening bolt that is engaged with the fastening bar.

The present invention is an invention for a pre-buried anchor system (A), and the pre-buried anchor system configuration is provided in a form that is attached to the formwork (60) before pouring concrete when manufacturing a reinforced concrete structure, It is a device that is embedded and fixed. The pre-buried anchor system is largely formed of a flat panel part, an insert part 20 and a fastening part 30 . The panel part 10 serves to integrate the pre-embedded anchor system configuration, and the insert part 20 and the fastening part 30 are coupled to each other to connect them as a single device. Such a panel part 10 may be manufactured using a conventional steel plate. The insert part 20 is embedded in the concrete (C) structure and connected to the inspection facility connected to the outside of the concrete structure in the future by bolts, and serves to substantially support the load of the inspection facility. The insert part has a nut part with a thread formed on the inner surface in detail, and forms one or more side sectional parts 24 on the outer surface. Through the nut part, a bolt passing through an inspection facility to be mounted after demolding of the form 60 in the future is fastened, and a skinless bolt or rubber packing is inserted at the entrance to prevent the intrusion of concrete (C) into the nut part before demolding the mold. can be The insert part 20 is provided to be fixedly supported on the panel part 10 , and a plurality of insert parts 20 are formed to be spaced apart from the panel part 10 by a predetermined interval. In order to form a conventional pre-embedded anchor system, the insert part is basically formed by providing a total of four insert parts 20 by a pair on the upper and lower sides, and basically two to four insert parts can be applied depending on the field conditions. , for the connection of a larger number of inserts 20 can be implemented by connecting each pre-embedded anchor system through a separate bracket.

Next, the fastening part is provided on the panel part 10 near the insert part, and is a member for fixing the pre-embedded anchor system configuration to the formwork 60 . A plurality of the fastening parts 30 may be provided in consideration of the size and weight of the pre-buried anchor system. The fastening part is constrained to the fastening key 50 and the fastening key that are welded to the formwork 60 when constructing the formwork, and supports the sacrificial member 40 and one side of the sacrificial member that are plastically deformed when the formwork is demolded. A fastening bar 33 coupled to the panel part 10 (a configuration referring to the insert part 20 or the insert part 20 body (bar) shown in FIGS. 1-3) and the fastening bar 33 The front end presses the other side of the sacrificial member 40 and consists of a fastening bolt 32 that is engaged with the fastening bar. In detail, the fastening key 50 is a member that is directly fixed to the inner surface of the formwork 60 for forming a reinforced concrete structure through welding, and the fastening key is inside the fastening key when the formwork 60 is demolded after concrete (C) is poured and cured. A sacrificial member 40 that is plastically deformed to separate the 50 from the pre-embedded anchor system is restrained and embedded. In addition, a fastening bar 33 and a fastening bolt 32 are provided for fixing the fastening key and the sacrificial member to the pre-embedded anchor system configuration until the mold is demolded, and the fastening bar 33 is the panel part 10 ) and at the same time supporting the sacrificial member 40 at its tip, and by pressing only the other side of the sacrificial member 40 from the front of the sacrificial member to be screwed into the nut hole at the tip of the fastening bar, the sacrificial member 40 It is formed in combination with the fastening bolt 32 constraining the. The insert part 20 and the fastening part 30 are coupled in such a way that both components abut against the mold 60 on the same plane.

[Embodiment 2-1] The present invention relates to a pre-embedded anchor system, and in Embodiment 1-1, the panel part comprises a steel plate.

[Embodiment 2-2] The present invention relates to a pre-buried anchor system, and in Embodiment 2-1, one end of the panel part is bent.

[Embodiment 2-3] The present invention relates to a pre-buried anchor system, and in Embodiment 2-1, a reinforcing rib is formed on one surface of the panel part.

[Embodiment 2-4] The present invention relates to a pre-buried anchor system, and in Embodiment 1-1, the panel part is made of engineering plastic.

The panel part 10 of the pre-buried anchor system configuration may be formed of a steel plate as described above. In addition, since the panel part is permanently embedded in the concrete structure, one end may be bent or reinforcing ribs may be added to one surface in order to secure a cross-sectional area of the joint and improve support performance. The panel part 10 may cause corrosion in the panel part 10 of steel due to moisture penetration due to cracks in the concrete (C) covering during common use. can be manufactured. In detail, the panel unit 10 may be made of MC nylon (Mono Cast Nylon), and may be manufactured using UHMWPE, polyamide (PA6), or polyethylene (PE).

[Embodiment 3-1] The present invention relates to a pre-buried anchor system, and in Embodiment 1-1, the insert part comprises forming a side cross-section in one or more sections on the outer surface.

[Embodiment 3-2] The present invention relates to a pre-embedded anchor system, and in Embodiment 3-1, the side end portion includes that the cross-section is formed to be larger than the outer surface of the insert portion.

[Embodiment 3-3] The present invention relates to a pre-buried anchor system, and in Embodiment 3-1, one or more of the side cross-sections include forming larger toward the other end.

[Embodiment 3-4] The present invention relates to a pre-embedded anchor system, and in Embodiment 3-1, one or more of the side end face parts are formed to be thicker toward the other end.

In the configuration of the pre-buried anchor system, a side cross-sectional portion 24 may be formed in one or more sections to secure a cross-sectional area combined with concrete to be poured on the outer surface of the insert portion. The side cross-section portion 24 is formed to protrude from the standard shape of the insert portion 20 or is formed to be recessed to increase the cross-sectional area bound to the concrete (C) material to achieve an integrated behavior, so the reliability of the coupling can be secured. have. The insert part 20 during the construction of the pre-buried anchor system is a structure that is permanently buried in the structure by pouring concrete, so it is very important to improve the bondability with the concrete (C) structure. Therefore, the outer surface of the insert portion may be formed with the side end surface portion 24 to improve the binding force with the concrete. The side end face portion 24 may be formed with a cross section larger than the outer surface of the insert unit 20 . The side section 24 may be manufactured in an optimal shape that is prevented from being pulled out by pulling or the like by the load of an inspection facility installed on the outer surface of the concrete structure, and may be applied in a resistive shape such as a funnel (cone) in detail. In addition, a plurality of enlarged side cross-sections 24 may be formed, which may be applied in a form in which one reference cross-section is gradually increased or decreased, and a method of changing the thickness or size in stages may be used.

[Example 4-1] The present invention relates to a pre-embedded anchor system, and in Example 1-1, a bolt is extended to the end of the insert part.

[Example 4-2] The present invention relates to a pre-buried anchor system, and in Example 1-1, a hook member is extended to the end of the insert part.

[Embodiment 4-3] The present invention relates to a pre-buried anchor system, and in Embodiment 4-2, the hook member includes the insert portion and the coupler extending.

[Example 4-4] The present invention relates to a pre-embedded anchor system, and in Example 1-1, the length of the insert part installed in the upper part of the plurality of insert parts is longer than the length of the insert part installed in the lower part. do.

The insert part 20 of the pre-buried anchor system configuration is coupled to the panel part 10, and a bolt or hook member may be extended from the end of the insert part to be connected to the reinforcing bar reinforced inside the concrete structure. The bolt or hook member may be directly screwed with the insert part 20, utilize a separate connection means such as a coupler, or be extended by welding. In addition, a plurality of insert parts coupled to the panel part 10 may have different embedding depths in the concrete structure depending on the application position. It may be formed longer. This is mainly due to the fact that the insert part 20 to be installed on the upper part supports the bending load of the inspection equipment to be fastened to the insert part after demolding the mold, and it is due to being greatly affected by loads such as drawing, and the insert part installed on the upper part It can be implemented by forming a bolt or a hook member at the end longer than the insert part installed at the bottom.

[Example 5-1] The present invention relates to a pre-embedded anchor system, and in Example 1-1, the fastening bar includes a coupling key and a cover member surrounding the sacrificial member.

[Embodiment 5-2] The present invention relates to a pre-embedded anchor system, and in Embodiment 5-1, the cover member is formed to be supported on the same plane as one end of the fastening key.

[Example 5-3] The present invention relates to a pre-embedded anchor system, and in Example 5-1, the cover member includes a protrusion formed from one end of the fastening key.

[Example 5-4] The present invention relates to a pre-buried anchor system, and in Example 5-3, it is elastically deformed and supported by the formwork, and includes forming a space of negative pressure.

[Example 5-5] The present invention relates to a pre-buried anchor system, and in Example 5-1, the cover member includes a cone shape.

[Example 5-6] The present invention relates to a pre-buried anchor system, and in Example 5-1, the cover member includes a hemispherical shape.

[Example 5-7] The present invention relates to a pre-buried anchor system, and in Example 5-1, the cover member includes a corrugated tubular shape.

[Example 5-8] The present invention relates to a pre-buried anchor system, and in Example 5-1, an elastic ring is formed at one end of the cover member.

The cover member 55 coupled to the fastening bar 33 in the configuration of the pre-buried anchor system is formed to have a space inside, and is provided in a shape to surround the fastening key 50 and the sacrificial member 40 . This is to prevent the concrete from penetrating into the joint space between the fastening key and the sacrificial member when the concrete (C) is poured in the formwork (60). In addition, the cover member 55 of the fastening part 30 can be formed to protrude from one end of the fastening key 50, which is a cover member ( 55) is elastically deformed to form a compressed space to cover, so that the interior including the fastening key 50 and the sacrificial member forms a space of negative pressure to more reliably prevent the inflow of concrete according to the concrete (C) pouring There is a purpose. For the above purpose, the cover member 55 is coupled to various positions of the fastening bar 33, and may be made of engineering plastic, urethane, silicone, rubber, etc., and may be manufactured in various cross-sectional shapes, It may be manufactured in the shape of a cone, a hemisphere, a corrugated tube, etc., and an elastic ring made of a material having a lower hardness than the cover member 55 may be attached to one end of this shape, that is, a surface in contact with the form 60 .

[Embodiment 6-1] The present invention relates to a pre-embedded anchor system, and in Embodiment 1-1, the fastening key includes one or more welding grooves on the outer surface.

[Example 6-2] The present invention relates to a pre-embedded anchor system, and in Example 6-1, the welding groove of the fastening key is formed to be larger than the size of the weld bead.

Among the construction of the pre-buried anchor system, the fastening key is made of metal, and a welding means can be used for coupling with the formwork. When the fastening key 50 is welded to the form 60, the welding position may be formed at various positions according to the convenience of the operator, which is the case that the welding position is not constant when the fastening key is removed after demolding the form 60 in the future. One or more welding grooves 53 are formed on the outer surface of the fastening key 50 in order to efficiently implement the point that the removal efficiency may be reduced, and uniform welding is performed by spot welding, etc. in the welding grooves 53, , the removal of the welding part can be conveniently performed when the fastening key is removed. In addition, the welding groove 53 is formed to be larger than the size of the welding bead so that the welding bead area is not exposed to the outside of the fastening key 50, thereby reducing the amount of welding remnants due to repeated use of the mold 60. This can extend the service life of the formwork.

[Example 7-1] The present invention relates to a pre-embedded anchor system, and in Example 1-1, the sacrificial member interferes with the fastening key, is bound to the fastening bar with the fastening bolt, and is It is plastically deformed and includes separation from the fastening key.

[Example 7-2] The present invention relates to a pre-buried anchor system, and in Example 7-1, the sacrificial member includes a metal material.

[Example 7-3] The present invention relates to a pre-buried anchor system, and in Example 7-2, the sacrificial member includes a metal material having a lower hardness than iron.

[Example 7-4] The present invention relates to a pre-embedded anchor system, and in Example 7-1, the sacrificial member includes deformation inducing grooves spaced apart from each other at regular intervals.

[Example 7-5] The present invention relates to a pre-buried anchor system, and in Example 7-4, the deformation inducing groove includes a U-shaped one.

[Example 7-6] The present invention relates to a pre-buried anchor system, and in Example 7-4, the deformation inducing groove includes a V-shaped one.

[Example 7-7] The present invention relates to a pre-embedded anchor system, and in Example 7-4, the deformation inducing groove includes an inverted T-shape.

[Example 7-8] The present invention relates to a pre-buried anchor system, and in Example 7-1, tear induction slots are formed in the sacrificial member at regular intervals, and the tear induction slot is one end of the sacrificial member. It includes a plurality of spaced apart from each other at regular intervals.

During the construction of the pre-buried anchor system, the sacrificial member 40 of the fastening part 30 is the fastening key 50 and the concrete (C) attached to the form when the pre-embedded anchor system demolds the form 60 through concrete curing in the future. ) is applied to separate the pre-buried anchor system embedded in the ), in detail to promote the forced separation through the plastic deformation of the sacrificial member (40). To this end, the sacrificial member should be provided with the weakest strength of the pre-buried anchor system configuration. The sacrificial member 40 may be made of a metal material, and may be made of a material having a hardness lower than that of iron, such as lead, zinc, aluminum, copper, or the like. In addition, the sacrificial member 40 may form deformation-inducing grooves at regular intervals to induce plastic deformation. V, U, inverted T-shaped grooves are formed, or a tear induction slot is provided to induce a tear. It may be formed in plurality, and may be formed by applying different thicknesses of the surface supported by the member coupled to the sacrificial member 40 and the plastic deformation position. However, when forming the structure and installing the form 60, it is attached to the inner surface of the form, and it should not be damaged by the falling impact of the concrete (C) being poured during concrete pouring and the vibration of the vibrator for concrete agitation. The strength must be secured.

[Example 8-1] The present invention relates to a pre-buried anchor system, and in Example 1-1, the fastening key is demolded together with the formwork after concrete pouring and curing, and the sacrificial member is included in the fastening key during demolding. Includes plastically deformed ones.

During the construction of the pre-buried anchor system, the fastening key 50 is demolded together with the formwork 60 after concrete (C) is poured and cured to form a concrete structure, and the sacrificial member 40 is deformed in the fastening key during demolding. and become immanent.

C: Concrete
A: Pre-buried anchor system
10: panel part
20: insert part 22: bolt
24: side section
30: fastening part 32: fastening bolt
33: fastening bar
40: sacrificial absence
50: fastening key 53: welding groove
55: cover member
60: formwork

Claims (10)

In the pre-embedded anchor system,
a flat panel portion; and
a plurality of insert units spaced apart from each other and fixed within the panel unit;
and
A fastening key provided in the panel part and welded to the formwork during formwork; and
a sacrificial member constrained by the fastening key and plastically deformed when the mold is demolded; and
A fastening bar that supports one side of the sacrificial member and is coupled to the panel unit; and
Pressing the other side of the sacrificial member at the tip of the fastening bar,
a fastening part comprising a fastening bolt that is engaged with the fastening bar;
a side section formed in one or more sections on the outer surface of the insert part;
a cover member coupled to the fastening bar to surround the fastening key and the sacrificial member;
The panel part is formed of a steel plate;
One end of the panel portion is bent, and a reinforcing rib is formed on one surface of the panel portion,
A hook member is formed extending from an end of the insert portion, and the hook member extends to the insert portion and a coupler,
The plurality of insert parts includes a length longer than the length of the insert part installed on the upper part is longer than the length of the insert part installed on the lower part,
The sacrificial member is spaced apart from each other at regular intervals to form a plurality of tear induction slots;
At least one side end portion is formed larger toward the other end, or is formed thicker toward the other end,
The cover member is formed to protrude from one end of the fastening key,
An elastic ring is formed at one end of the cover member,
The fastening key is provided with one or more welding grooves on the outer surface, wherein the welding groove of the fastening key is formed to be larger than the size of the weld bead pre-embedded anchor system.
delete delete According to claim 1,
The pre-embedded anchor system comprising the side cross-section formed in a cross-section that is enlarged than the outer surface of the insert.
delete delete delete delete According to claim 1,
The sacrificial member interferes with the fastening key, is bound to the fastening bar with the fastening bolt, and is plastically deformed at a predetermined load or more to be separated from the fastening key.
According to claim 1,
The fastening key is demolded together with the formwork after concrete pouring and curing, and the sacrificial member is plastically deformed and embedded in the fastening key during demolding.

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