KR20060059777A - A steel reinforcing connection sleeve and precast concrete member using the same - Google Patents

Abstract

The present invention relates to a sleeve for connecting the reinforcing bar, which is an environmentally friendly product that provides simple construction at the construction site and provides rapid construction and strong durability. The main body is formed, and inserted into the inside of the main body, the inner periphery of the fixed jack having a plurality of engaging grooves, and screwed to the other end of the main body, the fixed jack inserted into the inside of the main body by consolidating the fixed And a reinforcing bar coupled to the cap and the fixed jack, respectively, wherein the reinforcing bar is screwed and the reinforcing bar coupled to the locking groove of the fixed jack is tooth-coupled. It is characterized by.

In addition, the present invention relates to a PC member using a sleeve for connecting the reinforcing bar, for this purpose is made of the PC member made by reinforcing the sleeve for connecting, characterized in that the PC member can be easily and strong coupling between the reinforcing bar.

PC member, sleeve for reinforcing bar, elastic, fixed jack

Description

A steel reinforcing connection sleeve and precast concrete member using the same}

1 is a cross-sectional view showing a coupling process of a conventional PC member;

2 is an exploded perspective view of a sleeve for reinforcing bar connections according to an embodiment of the present invention;

Figure 3a is a first coupling cross-sectional view of the sleeve for connecting the rebar according to an embodiment of the present invention,

Figure 3b is a second coupling cross-sectional view of the sleeve for connecting bars according to an embodiment of the present invention,

Figure 4 is a cross-sectional view of the PC member using a sleeve for connecting bars according to an embodiment of the present invention,

Figure 5a, 5b, 5c is a cross-sectional view showing the coupling process of the engaging projection of the reinforcing bar and the reinforcing bar is mounted elastic band according to Figure 4,

6 is a cross-sectional view of the reinforcing bar taken along a line A-A of FIG. 2.

<Explanation of symbols for the main parts of the drawings>

10: main body 11: step

20: fixed jack 20a: main part

21: engaging groove 22: elastic band

30: cap 40: rebar

41: engaging projection 41a: first hypotenuse

41b: 2nd hypotenuse R1: 1st hypotenuse cabinet

R2: 2nd hypotenuse cabinet 100: sleeve

200, 200 ': PC member

The present invention relates to a sleeve and a PC member for connecting the reinforcing bar, and more particularly, a PC member made by incorporating a sleeve for connecting the reinforcing bar, the sleeve for connecting the reinforcing bar to facilitate the strong and strong coupling between the PC members and It relates to a PC member using the same.

In recent years, in order to shorten the construction time and prevent environmental pollution in the construction of buildings, the PC manufacturing method is used to manufacture PC components at specific places and to assemble the PCs in the construction site so that only PCs are combined. Mainly used. However, the above method is difficult to apply in high-rise buildings due to the decrease in bonding strength, which is a defect in design and construction.

Accordingly, in order to increase the bonding force between the PC members, the joint part of the PC member withstands a large tensile force and a compressive force by using a mortar injection method in Korean Patent Laid-Open Publication No. 2001-91696 (PC connection method using a rebar connection sleeve). It suggests a way to make it possible.

That is, as shown in Figure 1 to manufacture a PC member in the state of inserting the tubular sleeve in the interior, one side end surface of the sleeve (1) by inserting a reinforcing bar (2) to integrate with the PC member, the other side cross section The communication hole 6 is formed in communication with the end of the PC member so that the other reinforcing bars (2 ') can be inserted, and the inlet 5 of the mortar (3) is formed so that the sleeve and the outside communicate with the lower side, The outlet 4 of the injected mortar is formed to communicate with the outside in the upper part of the side, and the reinforcing bar 2 'of the other PC member is connected to the PC member in which the reinforcing bar 2 is integrated through the lower communication port 6. Insert the inside of the sleeve (1), the mortar (3) is introduced into the lower inlet (5) to gradually fill the upper layer and when the mortar is filled in the inner space of the sleeve through the outlet (4) of the upper By discharging gas into the The sum is integrated.

However, the method is difficult to confirm whether the mortar injection is made completely, there is a disadvantage that the bonding force and durability is reduced due to the bubbles generated during the mortar curing, quality inspection to check whether the mortar is mixed in the appropriate strength before injection Should be, there is a disadvantage that the working time is increased and the uniformity of the strength is lowered.

The present invention has been made in view of the above problems, and the first object of the present invention is a tubular body having a relatively larger inner diameter at one end than a main body having a stepped portion formed at one side, and interpolated into the inside of the main body. To the inner circumference of the fixed jack is formed with a plurality of locking grooves, screwed to the other end of the main body, the fixed jack inserted into the inside of the main body to consolidate the cap and the cap in close contact with the step of the main body And to provide a reinforcing bar sleeve including a reinforcing bar, respectively coupled to the fixed jack.

In addition, the second object of the present invention has a first hypotenuse angle (R1) of the engaging projection has a range of 40 ° to 45 ° so that the life of the molding die is extended to improve the productivity when forming the engaging projection on the surface of the rebar The second hypotenuse angle R2 is to provide a sleeve for reinforcing bars having a range of 70 ° to 83 °.

In addition, a third object of the present invention is to provide a PC member using a rebar connection sleeve made of a PC member formed by incorporating a sleeve for connecting a reinforcing bar to facilitate easy and strong coupling between the PC members.

Objects of the present invention, in the sleeve for connecting reinforcement,

The other end is a tubular body having a relatively larger inner diameter than the main body is formed with a stepped in one side, and inserted into the inside of the main body, a fixed jack formed with a plurality of engaging grooves on the inner circumference, the screw on the other end of the main body Is coupled, but the consolidation of the fixed jack interpolated into the interior of the main body and the cap to close the fixed jack to the step of the main body and the reinforcing bar axially coupled to each of the cap and the fixed jack; and is coupled to the cap Reinforcing bar is screwed and the reinforcing bar is coupled to the engaging groove of the fixed jack is achieved by a reinforcing sleeve for the connection.

Here, the fixing jack is divided into three parts about an axis, and it is preferable that two elastic bands are in close contact along the outer periphery so as to be elastically fixed to each other.

"형상의 단면을 갖는 결합돌기가 형성되며, 상기 결합돌기는 전조가공시 생산성을 향상시키기 위해 제 1빗변 내각(R1)이 40°내지 45°범위을 갖고, 제 2빗변 내각(R2)은 70°내지 83°범위를 갖는 것이 바람직하다.On the other hand, the reinforcing bar is tooth-connected to the locking groove of the fixing jack, so that it can proceed only in one direction

"A coupling protrusion having a cross-sectional shape is formed, and the coupling protrusion has a range between 40 ° and 45 ° of the first hypotenuse angle R1 to improve productivity during rolling, and the second hypotenuse angle R2 is 70 °. It is preferred to have a range from 83 °.

In addition, the object of the present invention is a PC member made by incorporating the reinforcing bar sleeve according to any one of claims 1 to 6, the PC member to expose the main body of the reinforcing bar connecting sleeve to the top, the screw Expose the combined rebars to a certain length. The reinforcing bar is achieved by the PC member using a sleeve for connecting the reinforcement, characterized in that the engaging projection is formed at the end.

At this time, the PC member is multi-stacked by the coupling protrusion of the reinforcing bar partially exposed in the lower part, the lowermost PC member is preferably bent the reinforcing bar to increase the structural strength.

Other objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and the preferred embodiments associated with the accompanying drawings.

Hereinafter will be described in detail with the accompanying drawings for the reinforcing sleeve and the PC member using the same according to the present invention.

Figure 2 is an exploded perspective view of the reinforcing bar sleeve according to an embodiment of the present invention, Figure 3 is a cross-sectional view of the coupling of the sleeve for connecting bar according to the embodiment of the present invention.

As shown in Figures 2 and 3, the present invention relates to a sleeve 100 for the reinforcing connection of the environmentally friendly product that provides a quick construction and strong durability by making a simple coupling at the construction site.

The reinforcing sleeve 100 is composed of four parts, which is the main body 10, the fixing jack 20 is inserted into the interior of the main body 10, and to prevent the departure of the high policy () The cap 30 is screwed to the main body 10 and the rebar 40 is axially coupled to the cap 30 and the fixed jack 20, respectively. In this case, the rebar 40 coupled to the cap 30 is screwed and the rebar 40 coupled to the locking groove 21 of the fixed jack 20 is preferably tooth-coupled.

Here, the main body 10 is composed of a hollow tubular body, and at this time, one end and the other end have a structure in which different inner diameters are formed.

In more detail, the main body 10 is configured to have a relatively larger diameter at one end than the other end, and a step 11 is formed to prevent separation of the fixing jack 20 inserted into one side. to be.

At this time, a female thread is formed on the other inner circumference of the main body 10 so that the cap 30 can be screwed together.

The fixing jack 20 is inserted in the other direction in which the female screw portion of the main body 10 is formed. The fixing jack 20 is divided into three parts about an axis, and two elastic bands 22 are tightly fixed along the outer circumference so as to be elastically fixed to each other. Here, the fixing jack 20 has a structure in which two recesses 20a are formed along the outer circumference of the elastic band 22 to elastically fix the elastic bands 22.

Here, the elastic band 22 is composed of an elastic metal leaf spring in the form of a "ring", but may also be in the form of rubber or packing made of synthetic resin. Therefore, the fixing jack 20 is provided with a structure that can selectively expand its inner diameter.

"의 형상의 취하고 있다.Meanwhile, the fixing jack 20 has a plurality of locking grooves 21 formed in the inner circumference thereof, and the locking grooves 21 are easily accessible from only one side to the other side.

Of the shape of ".

And the cap 30 is a structure in which a male screw portion is formed on one side outer circumference so as to be screwed to the other end of the main body 10. The cap 30 has a structure in which a female thread is formed at an inner circumference so as to be screwed with the reinforcing bar 40 '.

The cap 30 of this structure condenses the fixed jack 20 interpolated into the main body 10 so as to bring the fixed jack 20 into close contact with the step 11 of the main body 10. The diameter 30 is relatively smaller than the diameter of the other end of the main body 10, but has a diameter relatively larger than the diameter of the fixing jack 20 to consolidate the interpolated fixing jack 20.

Accordingly, the cap 30 is screwed into the body 10 to consolidate the fixing jack 20 inserted into the body 10.

4 is a cross-sectional view of the reinforcing bar taken along the line A-A of FIG.

As shown in FIG. 4, the reinforcing bar 40 has a structure in which coupling protrusions 41 are formed to correspond to the locking grooves 21 of the fixing jack 20 so as to be tooth coupled.

"형상의 단면을 갖는다.The coupling protrusion 41 is to be progressed in one direction with respect to the engaging groove 21.

"Has a cross section of shape.

Coupling protrusion 41 of this structure is formed through the forging after forging the rib formed on the surface of the reinforcing bar 40.

At this time, in order to improve the productivity during the rolling process, the internal angle R1 of the first hypotenuse 41a and the internal angle R2 of the second hypotenuse 41b have different angles.

Here, the first hypotenuse angle R1 is preferably configured to have a range of about 40 ° to 45 °. This is because the distribution strength, that is, the total force distributed on each surface of the first hypotenuse 41a is most evenly distributed. Therefore, since the external force (vertical stress and compressive stress) applied to the outside of the first hypotenuse 41a is also distributed along the first hypotenuse 41a, deformation of the coupling protrusion 41 according to the local external force does not occur relatively well. Because it does not.

In addition, it is preferable that the second hypotenuse angle R2 has a range of about 70 ° to 83 °. The shape of the second hypotenuse 41b is relatively smaller than the external force concentrated at the vertex where the first hypotenuse 41a and the second hypotenuse 41b meet, but according to the change of the angle of the second hypotenuse 41b. This is because the distribution strength is increased to delay the phenomenon in which the upper portion of the coupling protrusion 41 is easily worn or deformed.

If the second hypotenuse angle (R2) is more than 70 °, the engaging projection 41 of the reinforcing bar 40 rolled to the engaging groove 21 of the fixing jack 20 can be separated by weakening force Because it is not desirable.

In addition, if the second hypotenuse angle (R2) is 83 ° or more, the coupling force between the reinforcing bar 40 and the fixed jack 20 is increased, but the wear between the reinforcing bar 40 and the fixed jack 20 at the time of coupling In addition, molding dice (not shown) for forming the reinforcing bar 40 is also not preferable because the wear is easily made.

Meanwhile, each hypotenuse has the same angle as each hypotenuse of the coupling protrusion 41 such that the locking groove 21 of the fixing jack 20 mentioned above also corresponds to the coupling protrusion 41 of the reinforcing bar 40. .

Figure 4 is a cross-sectional view of the PC member using a sleeve for connecting reinforcing bars according to an embodiment of the present invention.

As shown in Figure 4, the PC member 200 according to the present invention can be used by internally reinforcing sleeve 100 for connecting.

The PC member 200 of such a structure has a structure in which the main body 10 of the rebar connection sleeve 100 is exposed to the upper portion, and the threaded rebar 40 is partially exposed to a predetermined length in the lower portion thereof.

In this case, the PC member 200 forms a coupling protrusion 41 at an end portion of the rebar 40 partially exposed at the lower portion thereof, thereby providing a structure in which the PC members 200 and 200 'can be stacked in multiple stages.

In detail, the PC member 200 is to be completed by placing the reinforcing bar 40 connected to the separate PC member (200 ') with the upper portion of the body 10 of the rebar connection sleeve 100 is exposed to the top. Can be.

Such a structure is inserted into the fixing jack 20 of the main body 10 by the coupling protrusion 41 of the reinforcing bar 40 by its own weight simply by simply placing it without a separate process for joining the respective PC members 200 and 200 '. Tight couplings are made.

In addition, the PC member 200 'positioned at the lowermost layer may be formed by bending at a predetermined angle inside the PC member 200' without protruding from the outside in order to increase structural strength.

  Figures 5a, 5b, 5c is a cross-sectional view showing the coupling process of the engaging projection of the reinforcing bar and the reinforcing bar is mounted elastic band according to FIG.

5A to 5C, when the first PC member 200 ′ is coupled to the exposed portion of the body 10 of the PC member 200, the coupling protrusion 41 is moved into the interior of the body 10. Is inserted. At this time, the coupling protrusion 41 applies a load to the locking groove 21 of the fixed jack 20 inserted into the main body 10, and the fixed jack 20 receives the load by the elastic band 22. This is expanded. At this time, the coupling protrusion 41 is expanded while being inserted. When the insertion is completed, the coupling protrusion 41 of the reinforcing bar 40 is fixed by the elastic restoring force of the elastic band 22 installed on the outer circumferential surface of the fixing jack 20. The locking groove 21 of the jack 20 is to be made a strong coupling.

As described above, as described in the sleeve for connecting the rebar according to the present invention and the PC member using the same, in addition to two elastic bands, one, three, four, five may also be used.

In addition to the fixed jack is divided into three. Of course, it can be configured into 2, 4, 5, and 6 sections.

In addition, the main body is not mentioned in the embodiment, but by forming a plurality of protrusions on the outer surface it is possible to improve the bonding force when placing concrete.

As described above, the sleeve for connecting the rebar and the PC member using the same according to the present invention are characterized by having a quick construction and a strong durability by making a simple coupling at a construction site.

In addition, by having a certain angle of inclination of the engaging projection has the feature that can improve the productivity of the coupling projection rolled into the molding die while maintaining the function of the existing projection of the existing rebar.

Although the present invention has been described in connection with the above-mentioned preferred embodiments, various other modifications and variations may be made without departing from the spirit and scope of the invention. Accordingly, it is intended that the appended claims cover such modifications and variations as fall within the true scope of the invention.

Claims (8)

In the sleeve for rebar connection, A main body 10 having a step 11 formed inside one side of the tube body having a relatively larger inner diameter than the other end; A fixed jack 20 inserted into the main body 10 and having a plurality of locking grooves 21 formed on an inner circumference thereof; The cap is screwed to the other end of the main body 10, the cap for consolidating the fixed jack 20 inserted into the interior of the main body 10 to the close step 11 of the main body 10 30; And It is made, including; and the reinforcing bar 40 axially coupled to the cap 30 and the fixed jack 20, respectively, Reinforcing bar 40 is coupled to the cap 30 is screwed and the reinforcing bar 40 is coupled to the engaging groove 21 of the fixed jack 20, the sleeve for reinforcing connections, characterized in that the teeth. The method of claim 1, The fixing jack 20 is divided into three parts about an axis, and two elastic bands 22 are in close contact with each other so as to be elastically fixed to each other. The method of claim 2, The elastic band 22 is a sleeve for reinforcing bars, characterized in that the use of rubber made of synthetic resin. The method of claim 2, The elastic band 22 is a sleeve for reinforcing bars, characterized in that using a metal spring plate. The method of claim 1, Reinforcing bar 40 is tooth-connected to the locking groove 21 of the fixing jack 20, So that it can only go in one direction

"A coupling protrusion 41 having a cross-sectional shape is formed, and the coupling protrusion 41 has a first hypotenuse angle R1 in a range of 40 ° to 45 ° in order to improve productivity during rolling. (R2) is a sleeve for connecting reinforcing bar, characterized in that it has a range of 70 ° to 83 °. The method of claim 1, The locking groove 21 of the fixing jack 20 may correspond to the coupling protrusion 41 of the reinforcing bar 40 in shape.

"Sleeving for reinforcing bars, characterized in that it takes a shape. Claims 1 to 6, the PC member 200 formed by internally reinforcing the sleeve 100 for connecting the reinforcing bar, the PC member 200 is the body 10 of the sleeve 100 for connecting the reinforcement to the top Exposed to the lower portion of the threaded rebar 40 exposed to a certain length. The reinforcing bar 40 is a PC member using a sleeve for connecting the reinforcing bar, characterized in that the coupling protrusion 41 is formed at the end. The method of claim 7, wherein The PC member 200 is multi-stacked by the coupling protrusion 41 of the reinforcing bar 40 partially exposed at the lower part, the lower PC (200 ') is bent the reinforcing bar 40 at a predetermined angle to increase the structural strength PC member using a sleeve for reinforcing bar connection, characterized in that.

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