KR102469147B1 - Slab insert fasteners to provide pre-installed anchor bolts - Google Patents

Abstract

The present invention relates to a slab insert fastener for providing a pre-installed anchor bolt. The slab insert fastener has a simple structure and, therefore, can be manufactured at low prices. The slab insert fastener can improve tensile strength and shear strength of a bolt member embedded into a slab to install various structures installed in the lower part of the slab. Also, the slab insert fastener can provide functionality in which a bushing member connected to a lower fastener fixed to an aluminum form can protect a bolt member while being coupled to the bolt member exposed to the lower side of the slab even when the mold is removed. In other words, the slab insert fasten includes: the lower fastener connected to the mold and having a bushing connection hole in which the upper side is open; the bushing member inserted into the bushing connection hole formed in the lower fastener; and the bolt member in which a lower end is inserted into and fixed to the bushing member to be embedded into the slab.

Description

Slab insert fasteners to provide pre-installed anchor bolts

The present invention relates to a slab insert fixture for providing pre-installed anchor bolts, and more specifically, a bolt member embedded in a slab when various structures installed below or above the slab are fixed, which can be manufactured at low cost due to its simple configuration. It is possible to improve the tensile strength and shear strength of the formwork, and the bushing member coupled to the lower fixture fixed to the formwork ('formwork of aluminum, steel, wood, etc., hereinafter referred to as formwork) moves to the lower side of the slab even when the formwork is removed. It is intended to provide a slab insert fixture for providing a pre-installed anchor bolt that can provide functionality to protect the bolt member while being coupled to the exposed bolt member.

When a building is newly constructed, structures such as various pipes are installed on the lower side of the slab, and anchor bolts are installed on the slab to fix and install these structures.

Recently, techniques for fixing an insert fixture to an aluminum formwork and using it to insert a nut into a slab have been proposed.

Representative examples are Republic of Korea Utility Model Publication (U) 20-2012-0001589 (March 7, 2012) insert lower fixture for Alform, Republic of Korea Patent Publication (A) 10-2009-0113476 (November 2, 2009) Inserts for concrete slabs, Korean Patent Registration Publication (B1) 10-1493249 (February 13, 2015), inserts for concrete slabs, etc. have been proposed.

In the case of the above preceding technologies, it is inconvenient to fasten the bolt to the nut embedded in the slab while the aluminum formwork is separated, and as the load hanging on the nut increases, the load concentrates on the embedded nut and cracks occur. There are problems such as

As a technology to solve these problems, a pre-construction type bolt assembly for formwork of Republic of Korea Patent Registration Publication (B1) 10-2130526 (July 6, 2020) is provided, and its configuration is a pair of fixtures screwed into an aluminum formwork. Wow; a support member configured in a flat plate shape provided with a fixture coupling portion that is detachable from the fixture; The head is located on the upper side of the support member and embedded in the slab, and includes a bolt exposed to the lower side of the aluminum formwork with the lower end coupled to the support member; The fixture is made of a configuration in which a support frame interviewed to the aluminum formwork is formed on the upper side of the threaded portion coupled to the aluminum formwork downward, and a head portion is formed on the upper side of the support frame; The fastener coupling part forms a fixing hole coupled so that the support frame of the fixture is inserted into the support frame and the head of the fixture is exposed upward.

This configuration makes it possible to insert bolts into the slab through a configuration in which a pair of fixtures are coupled to an aluminum formwork and a support member to which bolts are coupled to the joint is fixed. However, there are problems such as poor workability and increased manufacturing cost, so a technology capable of insert-joining bolts to slabs while improving them has been required.

KR 2020120001589 U 2012.03.07. KR 1020090113476 A 009.11.02. KR 101493249 B1 2015.02.13. KR 102130526 B1 2020.07.06.

Accordingly, the present inventors have researched and developed the present invention to eliminate various problems according to the conventional slab insert fixture for Alform.

That is, in the present invention, it is possible to manufacture cheaply with a simple configuration consisting of a lower fixture fixed to the formwork, a bushing member coupled to the lower fixture, and a bolt member whose lower end is coupled to the bushing member and buried in the slab, and the upper part of the bolt member With the configuration in which the whole is buried in the slab, it is possible to improve the axial tensile strength and the shear strength in the axial right angle direction, and also maintains the structure in which the bushing member is covered with the bolt member exposed at the bottom of the slab when the formwork is removed. The present invention has been completed with the technical problem of the invention in providing a slab insert fixture for providing a pre-installed anchor bolt that provides functionality that can eliminate concerns such as damage.

In addition, the present invention has a technical problem of the invention in providing a slab insert fixture for providing a pre-installed anchor bolt that provides a configuration in which the bolt member is exposed to the upper side of the slab so that various types of objects installed on the top of the slab can be easily constructed. completed the present invention.

As a means of solving the problem, in the present invention,

First, a lower fixture having an upwardly opened bushing coupling hole and coupled to the formwork; a bushing member fitted into the bushing coupling hole formed in the lower fixture; It is characterized in that it comprises a bolt member fixed by inserting the lower end of the bushing member so as to be embedded in the slab.

Second, a lower fixture in which an upwardly opened bushing coupling hole is formed and coupled to the formwork; A bushing member made of synthetic resin or plastic so that the bolt coupling hole inserted into the bushing coupling hole formed in the lower fixture is opened upward; Including a bolt member fixed by inserting the lower end to the bushing member so as to be buried in the slab; The bolt member is composed of a computerized bolt so that the upper end is exposed to the upper side of the slab, and a plurality of nuts are coupled to the middle buried in the slab.

Third, the lower fixture includes a fitting portion fitted into a coupling hole formed in a formwork; It is formed at the top of the fitting part and consists of a fixing flange having a plurality of fixing holes; The fixing flange is characterized in that it is fixed to the formwork by a piece or nail coupled to the fixing hole in a state of close contact with the formwork.

Fourth, the lower fixture has a screw portion formed with a screw on the outside so as to be fastened to a screw hole formed in the formwork; a fixed flange formed at the top of the threaded portion; It is characterized in that a hexagonal groove or a hexagonal protrusion is formed in the center of the fixing flange.

Fifth, the lower fixture is characterized in that a ventilation hole is formed at the bottom of the bushing coupling hole to penetrate vertically.

Sixth, it is characterized in that a thread or a plurality of annular protrusions are formed at the lower end of the bolt coupling hole of the bushing member so as to be caught in the screw portion of the bolt member.

The seventh bushing member is characterized by forming an annular protrusion upward and downward on the outside of the bushing member so that it is easily separated when the lower fixture is removed together with the formwork.

Eighth, the bushing member is a bottom plate interviewing the bottom of the bushing coupling hole; a lower pressing part inclined outward from the edge of the bottom plate; The upper pressurization part is formed inclined inward from the top of the lower pressurization part, and it is configured like a pot so that when it is coupled to the bushing coupling hole of the lower fixture in the state of being coupled to the bolt member, the lower pressurization part and the upper pressurization part are unfolded and pressurized by the bolt member. characterized by one.

Ninth, a screw thread or a plurality of annular protrusions are formed at the lower end of the lower pressing part of the bushing member to be caught in the threaded portion of the bolt member, and a blocking protrusion for pressing the bolt member is formed at the upper end of the upper pressing part to block the inflow of mortar. And, it is characterized in that an annular projection is formed on the outside of the lower pressing part and the upper pressing part.

Tenth, a protrusion is formed on the lower side of the bushing member to be inserted into the ventilation hole formed in the lower fixture; It is characterized in that the protrusion is formed with a drain hole communicating with the bolted connection hole.

Eleventh, the bolt member is characterized in that a reinforcing plate having a large area is disposed toward the upper bolt head and fixed with a nut fastened to the bolt member.

Twelfth, it is characterized in that an upward or downward bent portion is formed at the edge of the reinforcing plate.

It is characterized in that the adapter is coupled between two nuts coupled to the middle of the bolt member composed of computerized bolts to be buried in the thirteenth slab.

Fourteenth, the adapter is formed in a straight line shape with a narrow width and a long length, and a bolt hole to which a bolt member is coupled is formed in the center.

Fifteenth, the adapter is formed in a straight line shape with a narrow width and a long length, and a bolt hole is formed at one end and a slot groove is formed at the other end, so that bolt members are coupled to both sides.

Sixteenth, forming a binding groove in the adapter; The binding groove is formed on the side of the bolt hole and the slot groove to provide a gap between the two neighboring bolt members to improve the horizontal and verticality with the neighboring bolt member, and to be fixed with reinforcing bars and wires buried in the slab. characterized by one.

In the case of using the slab insert fixture for providing the wire installation anchor bolt provided by the present invention, the following effects are obtained.

- The entire bolt member is embedded in the slab, which can improve tensile strength in the axial direction and shear strength in the direction perpendicular to the axis.

-Since the bushing member inserted into the lower fixture permanently coupled to the Alform remains coupled to the bolt member in a state where the formwork is removed, problems such as bolt damage by external factors can be eliminated.

-As a protrusion is formed at the bottom of the bolt coupling hole formed in the bushing member and coupled with the thread of the bolt member, it is possible to prevent the bushing member from being arbitrarily separated from the bolt member, and the protrusion formed on the lower side of the bushing member is attached to the lower fixture. Since it provides a configuration to be inserted into the formed ventilation hole, it is possible to fix the bushing member in place, and it is possible to provide a solid coupling state without shaking in the inserted state.

- A ventilation hole is formed in the lower fixture and a drain hole is formed in the bushing member, so even if mortar or the like flows into the bushing coupling hole of the lower fixture or the bolt coupling hole of the bushing member, it can be immediately discharged to the outside.

-When the bushing member is provided in a configuration in which a lower pressing part is inclined outward from the edge of the bottom plate and an upper pressing part is inclined inward to the upper side, when combined with the bolt member and coupled to the bushing coupling hole of the lower fixture Since the lower pressing portion and the upper pressing portion are stretched and pressed against the bolt member, a more robust coupling state with the bolt member can be provided.

- When the reinforcement plate is combined with the bolt member, the bolt member buried in the slab can be more firmly fixed.

-If the top of the bolt member is exposed to the top of the slab in a state where the bolt member is composed of computerized bolts, troublesome work such as drilling a hole in the floor and installing anchor bolts can be eliminated.

1 is a perspective view showing a preferred embodiment of a slab insert fixture for providing pre-installed anchor bolts provided by the present invention
Figure 2 is a cross-sectional view of the state of use of Figure 1
Figure 3 is a perspective view showing another embodiment of a slab insert fixture for providing pre-installed anchor bolts provided by the present invention
Figure 4 is a cross-sectional view of the state of use of Figure 3
Figure 5 is a perspective view showing another example of a bushing member that can be applied to the present invention
Figure 6 is a cross-sectional view of Figure 5
Figure 7 is a perspective view showing another example of a bushing member that can be applied to the present invention
Figure 8 is a cross-sectional view of Figure 7
9 is a cross-sectional view showing a state in which a reinforcing plate is applied to the bolt member of the present invention
10 and 11 are cross-sectional views showing an example in which the bolt member of the present invention is configured to protrude upward from the slab
Figure 12 is a plan view showing examples of adapters applied to the bolt member of the present invention
13 is a cross-sectional view of bushing members that can be applied to the present invention

Hereinafter, a preferred embodiment of a slab insert fixture for providing a wire installation anchor bolt provided by the present invention will be described based on the accompanying drawings.

1 is a perspective view showing a preferred embodiment of a slab insert fixture for providing pre-installed anchor bolts provided by the present invention, and FIG. 2 is a cross-sectional view of the state of use of FIG.

The slab insert fixture 1 for providing pre-installed anchor bolts provided by the present invention includes a lower fixture 10 permanently coupled to the formwork 100, a bolt member 20 inserted into the slab 200, and a bolt member It is coupled to the lower fixture 10 in a state inserted into (20), and is largely divided into a bushing member 30 surrounding the bolt member 20 protruding downward from the slab 200 in a state in which the formwork 100 is removed.

The lower fixture 10 is permanently fixed to the formwork 100, and may be provided with metal or non-ferrous metal such as aluminum, and is fixed to the upper side of the fitting part 12 so that the upwardly opened bushing coupling hole 11 is formed. (13) is provided.

The fitting part 12 is inserted into the coupling hole 110 formed in the formwork 100 and protrudes downward from the formwork 100, and the fixing flange 13 is surfaced on the side in contact with concrete.

At this time, a plurality of fixing holes 14 are formed in the fixing flange 13, and a piece or nail 15 is coupled to the fixing hole 14 to permanently fix the lower fixture 10 to the formwork 100 do.

In addition, a ventilation hole 16 is formed at the bottom of the bushing coupling hole 11 formed at the center of the fitting portion 12 to provide a function of quickly discharging mortar or the like flowing into the bushing coupling hole 11 to the outside. . At this time, the ventilation hole 16 is smaller than the diameter of the bushing coupling hole 11 and is formed to a size so that the bushing member 30 is not separated, and the inclined guide surface 11a at the entrance of the bushing coupling hole 11 ) to form

In the case of the ventilation hole 16, when removing the hardened mortar in the bushing coupling hole 11, the removal material is discharged through the ventilation hole 16 in the bushing coupling hole 11, and the formwork 100 ), it is possible to work without inconvenience such as having to turn over.

The bolt member 20 is buried in the slab 200, and the bushing member 30 is covered at the bottom and located in the bushing coupling hole 11 of the lower fixture 10, and the slab with the formwork 100 removed (200) is exposed to the lower side.

The bolt member 20 is provided in various lengths, and the length buried in the slab 200 is longer than the length exposed to the lower side of the slab 200 to provide a solid coupling state.

The bushing member 30 is inserted into the bushing coupling hole 11 of the lower fixture 10 and has a locking jaw 30a expanded outward to be caught on the inclined guide surface 11a formed at the inlet side of the bushing coupling hole 11. Formed, it may be provided with rubber or soft synthetic resin, etc., a bolt coupling hole 31 with an upper and lower opening or a bottom blocked is formed, and a drain hole 32 is formed at the bottom of the bolt coupling hole 31 to During concrete pouring, it is possible to quickly drain the mortar or the like flowing into the bushing member 30 to the outside.

In addition, a protrusion 33 may be formed on the lower portion of the bushing member 30 so as to be coupled to the ventilation hole 16 formed in the lower fixture 10, which is coupled with the correct position of the bushing member 30 in a fitted state. To prevent shaking and to provide functionality to maintain perpendicularity (see Fig. 13).

3 is a perspective view showing another embodiment of a slab insert fixture for providing pre-installed anchor bolts provided by the present invention, and FIG. 4 is a cross-sectional view of the state of use of FIG.

Another embodiment of the slab insert fixture 1 for providing the pre-installed anchor bolt of the present invention is to change the configuration of the lower fixture 10 permanently coupled to the formwork 100.

As shown, the lower fixture 10 of another embodiment has a bushing coupling hole 11 that is upwardly opened so as to be fastened to the screw hole 120 formed in the formwork 100, and a screw portion 17 with a screw formed on the outside. ) is formed and provides a configuration in which a fixing flange 13 formed at the top of the threaded portion 17 is formed.

In addition, a hexagonal groove or a hexagonal protrusion 18 is formed toward the bushing coupling hole 11 formed at the center of the fixed flange 13 so that a tool such as a hexagonal wrench, spanner, or electric box wrench can be used.

That is, when fastening the threaded portion 17 of the lower fixture 10 to the formwork 100, use a hexagonal wrench, spanner, or electric box wrench on the hexagonal groove or hexagonal protrusion 18 formed toward the bushing coupling hole 11. By combining the same tool, the lower fixture 10 can be coupled to the screw hole 120 formed in the formwork 100.

At this time, a drill part 17a may be applied to the lower side of the screw part 17 to form a screw hole 120 in the formwork 100.

It is very advantageous in forming the screw hole 120 in the formwork 100 when the drill part 17a is further configured below the screw part 17.

Since the configuration of the bolt member 20 and the bushing member 30 is the same as that of FIGS. 1 and 2, a detailed description thereof will be omitted.

5 is a perspective view showing another example of a bushing member that can be applied to the present invention, and FIG. 6 is a cross-sectional view of FIG.

The bushing member 30 that can be applied to the present invention can be provided in various configurations, and according to the drawing, as mentioned above, the outer shape fitted into the bushing coupling hole 11 formed in the lower fixture 10 The branches are composed of rubber or soft synthetic resin, and an upwardly opened bolt coupling hole 31 is formed at the center, a drain hole 32 is formed at the bottom of the bolt coupling hole 31, and a lower fixture 10 is formed at the bottom. A protrusion 33 fitted into one ventilation hole 16 may be formed (see FIG. 13).

In addition, a screw thread or a plurality of annular projections 31a are formed at the bottom of the bolt coupling hole 31, and annular projections 30b are formed on the outside of the bushing member 30 in an up and down direction.

As described above, when a screw thread or a plurality of annular protrusions 31a are formed at the lower part of the bolt coupling hole 31, when the bolt member 20 is coupled to the bushing member 30, the lower end of the bolt member 20 forms these threads. Alternatively, even if the lower fixture 10 is removed together with the formwork 100 by being coupled to the plurality of annular projections 31a, the bushing member 30 remains coupled to the bolt member 20, so that the slab 200 moves downward. Problems such as damage to the exposed portion can be prevented, and since the annular protrusions 30b are formed upward and downward on the outside of the bushing member 30, the contact surface with the lower fixture 10 is minimized. It is to provide functionality that is easily separated when the lower fixture 10 is removed.

7 is a perspective view showing another example of a bushing member that can be applied to the present invention, and FIG. 8 is a cross-sectional view of FIG. 7 .

Another example of the bushing member 30 applied to the present invention is provided in a configuration such as a pot so that the bolt coupling hole 31 is formed to open upward as shown.

That is, a lower pressing part 35 formed inclined outward upwardly from the edge of the bottom plate 34 that faces the bottom of the bushing coupling hole 11 formed in the lower fixture 10 is formed, and the lower pressing part 35 It provides a configuration in which an upper pressing portion 36 is formed inclined inwardly from the upper end, and a screw thread or a plurality of annular projections 31a are formed at the lower end of the lower pressing portion 35. In addition, a drainage hole 32 is formed at the bottom of the bolted connection hole 31, and a protrusion 33 inserted into the ventilation hole 16 formed in the lower fixture 10 can be formed at the bottom of the bottom plate 34. Yes. (See Fig. 13)

In addition, a blocking protrusion 37 for pressing the bolt member 2 is formed at the upper end of the upper pressing part 36 to block the inflow of mortar, and an annular shape is formed on the outside of the lower pressing part 35 and the upper pressing part 36. forming protrusions 38.

When the bushing member 30 is configured in this way, when the bushing member 30 is coupled to the bolt member 20 and coupled to the bushing coupling hole 11 of the lower fixture 10, the lower pressing portion 35 and the upper pressing portion ( 36) is pressed and fixed to the bolt member 20 while being unfolded, and when the lower fixture 10 is separated along with the formwork 100, the lower pressing part 35 and the upper pressing part 36 are restored to their original state and become like a jar. At this time, Since the bushing member 30 is maintained coupled to the bolt member 20 by the screw thread or the plurality of annular projections 31a formed at the lower end of the lower pressing portion 35, the portion exposed to the lower side of the slab 200 is Problems such as damage can be prevented.

9 is a cross-sectional view showing a state in which a reinforcing plate is applied to the bolt member of the present invention.

As described above, in configuring the slab insert fixture 1 for providing the pre-installed anchor bolts, a wide reinforcing plate 22 is disposed toward the upper bolt head 21 on the bolt member 20, and the bolt member 20 ) It is to be fixed with a nut 23 fastened to.

At this time, an upward or downward bent portion 22a is formed at the edge of the reinforcing plate 22 .

In the case of applying the reinforcing plate 22 as described above, it is possible to improve the bearing capacity when a tensile load is generated in the bolt member 20 buried in the slab 200, especially when the bent portion 22a is formed at the edge. It is possible to further improve the bearing capacity of the bolt member 20 by increasing the bonding force between the reinforcing plate 22 and the slab 200 .

10 and 11 are cross-sectional views showing an example in which the bolt member of the present invention is configured to protrude upward from the slab, and FIG. 12 is a plan view showing examples of adapters applied to the bolt member of the present invention.

In configuring the slab insert fixture 1 for providing the pre-installed anchor bolts as described above, the bolt member 20 is configured as a computerized bolt and the nut 23 is fastened thereto, and the slab 200 It is configured so that a part of the bolt member 20 can be exposed to the top.

Two nuts 23 are installed in the middle of the bolt member 20, or one is buried in the upper surface of the slab 200, and buried in the slab 200 above the lower fixture 10. One more can be installed.

At this time, a separate cap 24 is covered on the bolt member 20 exposed to the upper part of the slab 200 to protect the bolt member 20.

In addition, an adapter 25 may be further installed between the two nuts 23 installed in the middle of the bolt member 20.

The adapter 25 is formed in a straight line shape with a narrow width and a long length, and is provided in a configuration in which a bolt hole 25a to which the bolt member 20 is coupled is formed in the center (see a to c in FIG. 12), or one side It is possible to form a bolt hole 25a on one end and a slot groove 25b on the other side so that the bolt member 20 is coupled to both sides. (See d to f in FIG. 12)

When configuring the adapter 25 as shown in FIGS. 11 and 12, a binding groove 25c may be formed in the adapter 25. The coupling groove 25c is preferably formed on the side of the bolt hole 25a and the slot groove 25b so as to provide a gap between the two adjacent bolt members 20.

As described above, when the bolt hole 25a, the slot groove 25b, and the binding groove 25c are formed in the adapter 25, the horizontal and vertical degree of the bolt member 20 is checked when the plurality of bolt members 20 are installed. It can be improved, and the distance with the neighboring bolt member 20 can be easily adjusted using the binding groove 25c, and the bolt member 20 can be fixed with a wire and the reinforcing bar 300 buried in the slab 200. Functionality capable of maintaining the fixed state more firmly is provided.

As described above, when the bolt member 20 is provided in a configuration in which the upper side of the slab 200 is exposed, problems such as the need to install anchor bolts after drilling on the floor to fix the structure during on-site work can be eliminated. can

Therefore, it is possible to provide the functionality of fixing various structures to the upper and lower parts of the slab 200 by using the slab insert fixture 1 for providing the pre-installed anchor bolts provided in the present invention on the floor.

When trying to use the slab insert fixture 1 for providing pre-installed anchor bolts provided in the present invention configured and operated as described above, the lower fixture 10 is first coupled to the formwork 100.

As described above, in a state in which the lower fixture 10 is coupled to the formwork 100, the bushing member 30 is inserted into the bushing coupling hole 11, and the lower end of the bolt member 20 is inserted into the bolt coupling hole 31. By doing so, the bolt member 20 is pressed.

At this time, when a screw thread is formed in the bolt coupling hole 31 formed in the bushing member 30, when the bolt member 20 is screwed and an annular projection is formed, the bolt member 20 may be forcibly fitted by pressing.

As described above, in the state in which the bolt member 20 is coupled to the bushing member 30, concrete is poured to the upper side of the formwork 100, and the formwork 100 is removed in a state where the slab 200 is cured. At this time, the formwork 100 ) The lower fixture 10 fixed to is separated from the bushing member 30, and the bushing member 30 remains coupled to the bolt member 20 protruding downward from the slab 200.

In this state, when trying to install various structures on the bolt member 20, the bushing member 30 is removed from the bolt member 20, and then, in a state where various structures are coupled to the bolt member 20, separately prepared nuts are fastened and fixed. You can do it.

Therefore, according to the present invention, it is possible to manufacture cheaply with a simple configuration, improve the tensile strength in the axial direction and the shear strength in the axial direction perpendicular to the bolt member 20, and the bushing in the bolt member 20 exposed to the lower part of the slab 200. Since the structure in which the member 30 is covered is maintained, functionality capable of eliminating concerns such as damage to the bolt member 20 is provided.

Although specific embodiments have been described in the detailed description of the present invention, various modifications are possible without departing from the scope of the present invention. Therefore, the protection scope of the present invention should not be limited to the described embodiments and should not be determined, but should be determined by the equivalents as well as the claims described later.

1: slab insert fixture 10: lower fixture
11: bushing coupling hole 12: fitting part
13: fixed flange 14: fixed hole
15: piece or nail 16: ventilation hole
17: screw part 17a: drill part
18: Hexagonal groove or hexagonal projection 20: Bolt member
21: bolt head 22: reinforcement plate
22a: bent portion
23: nut 24: cap
25: adapter 25a: bolt hole
25b: slot home 25c: binding home
30: bushing member 30a: locking jaw
30b, 38: annular protrusion
31: bolt coupling hole 31a: screw thread or a plurality of annular projections
32: drain hole 33: stone
34: bottom plate 35: lower pressing part
36: upper pressure part 37: blocking protrusion
100: formwork 110: coupling hole
120: screw hole 200: slab
300: rebar

Claims (16)

a lower fixture 10 having an upwardly opened bushing coupling hole 11 formed and coupled to the formwork 100;
A bushing member 30 made of synthetic resin or plastic so that the bolt coupling hole 31 inserted into the bushing coupling hole 11 formed in the lower fixture 10 is opened upward;
Including a bolt member 20 fixed by inserting a lower end into the bushing member 30 so as to be buried in the slab 200;
The bushing member 30 includes a bottom plate 34 interviewing the bottom of the bushing coupling hole 11;
a lower pressing part 35 inclined outward from the edge of the bottom plate 34;
When the upper pressing portion 36 inclined inwardly from the upper end of the lower pressing portion 35 is configured like a pot and coupled to the bushing coupling hole 11 of the lower fixture 10 in a state of being coupled to the bolt member 20 A slab insert fixture for providing a pre-installed anchor bolt, characterized in that the lower pressing portion 35 and the upper pressing portion 36 can be pressed to the bolt member 20 while being unfolded.
a lower fixture 10 having an upwardly opened bushing coupling hole 11 formed and coupled to the formwork 100;
A bushing member 30 made of synthetic resin or plastic so that the bolt coupling hole 31 inserted into the bushing coupling hole 11 formed in the lower fixture 10 is opened upward;
Including a bolt member 20 fixed by inserting a lower end into the bushing member 30 so as to be buried in the slab 200;
The bolt member 20 is composed of a computerized bolt so that the upper end is exposed to the upper side of the slab 200, and a plurality of nuts 23 are coupled in the middle buried in the slab 200;
The bushing member 30 includes a bottom plate 34 interviewing the bottom of the bushing coupling hole 11;
a lower pressing part 35 inclined outward from the edge of the bottom plate 34;
When the upper pressing portion 36 inclined inwardly from the upper end of the lower pressing portion 35 is configured like a pot and coupled to the bushing coupling hole 11 of the lower fixture 10 in a state of being coupled to the bolt member 20 A slab insert fixture for providing a pre-installed anchor bolt, characterized in that the lower pressing portion 35 and the upper pressing portion 36 can be pressed to the bolt member 20 while being unfolded.
according to claim 1 or claim 2;
The lower fixture 10 includes a fitting portion 12 fitted into a coupling hole 110 formed in the formwork 100;
It is formed at the top of the fitting part 12 and consists of a fixing flange 13 having a plurality of fixing holes 14;
The fixing flange 13 is fixed to the formwork 100 by a piece or nail 15 coupled to the fixing hole 14 in a state of being in close contact with the formwork 100 Provide a pre-installed anchor bolt, characterized in that for slab insert fixtures.
according to claim 1 or claim 2;
The lower fixture 10 includes a threaded portion 17 externally threaded to be fastened to the threaded hole 120 formed in the mold 100;
a fixed flange 13 formed at the top of the threaded portion 17;
Slab insert fixture for providing a pre-installed anchor bolt, characterized in that a hexagonal groove or a hexagonal projection 18 is formed in the center of the fixing flange 13.
according to claim 1 or claim 2;
The lower fixture 10 is a slab insert fixture for providing pre-installed anchor bolts, characterized in that a ventilation hole 16 is formed at the bottom of the bushing coupling hole 11.
according to claim 1 or claim 2;
For providing a pre-installed anchor bolt, characterized in that a screw thread or a plurality of annular protrusions (31a) are formed at the lower end of the bolt coupling hole (31) of the bushing member (30) to engage the threaded portion of the bolt member (20). Slab insert fixture.
delete delete according to claim 1 or claim 2;
A screw thread or a plurality of annular protrusions 31a are formed at the lower end of the lower pressing portion 35 of the bushing member 30 so as to be caught in the screw portion of the bolt member 20, and a bolt member is formed at the upper end of the upper pressing portion 36. A line characterized by forming a blocking protrusion 37 for pressing (2) to block the inflow of mortar, and forming an annular protrusion 38 outside the lower pressing part 35 and the upper pressing part 36 Slab insert fixture for providing installation anchor bolts.
according to claim 1 or claim 2;
At the bottom of the bushing member 30, a protrusion 33 is formed to fit into the ventilation hole 16 formed in the lower fixture 10;
Slab insert fixture for providing pre-installed anchor bolts, characterized in that the protrusion 33 forms a drainage hole 32 communicating with the bolt coupling hole 31.
according to claim 1;
For providing a pre-installed anchor bolt, characterized in that a reinforcing plate (22) having a large area is placed on the bolt member (20) toward the upper bolt head (21) and fixed with a nut (23) fastened to the bolt member (20). Slab insert fixture.
according to claim 11;
Slab insert fixture for providing pre-installed anchor bolts, characterized in that an upward or downward bent portion (22a) is formed at the edge of the reinforcing plate (22).
according to claim 2;
A slab insert fixture for providing a pre-installed anchor bolt, characterized in that the adapter 25 is coupled between the two nuts 23 coupled in the middle of the bolt member 20 composed of the bolt member 20 to be buried in the slab 200.
according to claim 13;
The adapter 25 is formed in a straight line with a narrow width and a long length, and has a bolt hole 25a to which the bolt member 20 is coupled to the center. Slab insert fixture for providing anchor bolts.
according to claim 13;
The adapter 25 is formed in a straight line shape with a narrow width and a long length, and has a bolt hole 25a formed at one end and a slot groove 25b formed at the other end so that the bolt member 20 is coupled to both sides. Slab insert fixture for providing pre-installed anchor bolts.
according to claim 15;
Forming a coupling groove (25c) in the adapter (25);
The coupling groove 25c is formed on the side of the bolt hole 25a and the slot groove 25b to provide a gap between the two adjacent bolt members 20, so that the bolt member 20 and the neighboring bolt members 20 are horizontal and vertical. Slab insert fixture for providing a pre-installed anchor bolt, characterized in that it can be fixed with a wire and a reinforcing bar 300 buried in the slab 200.

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