KR100609928B1 - Steel Rest including Insert Part - Google Patents

Abstract

The present invention relates to an insert-supported reinforcing bar support that is stable even if it is not fixed with nails during construction including concrete placing.

The present invention is characterized in that the lower body portion is formed with an insert hole 43 in the bottom surface 39; An upper body portion on which rebar is seated; In the insert reinforcing bar pedestal 30 including an intermediate body portion including the female threaded portion 41 of the insert between the upper body and the lower body, when the concrete is poured into the insert hole 43 of the lower body In order not to go, the sponge nonwoven double-sided tape is further attached to the bottom surface 39 of the lower body part.

Rebar pedestal, inserts, double-sided tape, secondary pedestals, nails

Description

Insert reinforcing bar bracket {Steel Rest including Insert Part}

1 is a view showing an example of a conventional insert double reinforcing bar support.

Figure 2 is a view showing another example of a conventional insert combined reinforcement.

3 is a view showing an example of a combined reinforcing bar support according to the present invention.

4 is a view showing an example of an auxiliary reinforcing bar according to the present invention.

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

4: nail hole 7: weight loss groove

17: lower cap 18: nail insertion hole

19: upper cap 22: leg portion

31 lower part plate 32: concave portion of the intermediate body portion

33: upper end 34: rebar seat groove

36, 37: protrusion island 39: bottom surface

41: female thread hole 43: male thread insert hole

50: bottom of the auxiliary base 52: border of the auxiliary base

55: reinforced seating groove of the auxiliary support

The present invention relates to an insert combined reinforcing bar, and more particularly, to a combined insert reinforcing bar support (E04 C 5, IPC classification) even if it is not fixed with nails during construction including concrete placing.

In the form of building structures, reinforced concrete construction is the most important and the most widely used construction. In order to maximize the advantages of this industry, the spacing between rebars should be maintained appropriately. Meanwhile, an insert for fixing a hanger (hanger) for supporting a ceiling finish, pipes, etc. is buried in the floor slab on the ceiling of the building floor.

The techniques described in Korean Utility Model Application Nos. 99-2322 and 99-6294 during prior applications are as follows. A trapezoidal insert insertion groove is formed at the lower side of the reinforcing bar, and the insert insertion stop has a nail head for installing the ceiling plate or an insert having a ceiling plate insertion hole to which the screw part of the ceiling plate fitting is to be fastened. It is to be removable. In this case, the insert for inserting the nail head and the insert to which the screw part can be fastened separately, respectively, and the reinforcing bar body also had to be manufactured separately.

Thereafter, an attempt was made to form the insert and the reinforcing bar integrally.

For example, in Korean Utility Model Utility Model No. 20-0308686 (filed June 4, 1999), a screw hole is formed inside the body or a nut having a female thread part is inserted to install a ceiling plate for installing a ceiling plate. An insert in which a male screw portion of an installation tool can be fastened to a female screw portion of the screw hole or a nut, wherein a reinforcing portion is formed above the head of the insert, and a flange portion having a nail insertion hole is formed below the body. An insert having a reinforcing bar portion was proposed.

Also, as described in Korean Utility Model Publication No. 1999-0033841 (published Aug. 16, 1999), when constructing a horizontal concrete structure such as slab, a reinforcing bar embedded inside the structure has been proposed.

This is to form a nail insertion hole for fixing the reinforcing bar to the formwork at a predetermined position of the reinforcing bar while integrally forming the insert screw hole for installing the ceiling plate on the lower side of the reinforcing bar. FIG. 1 which shows this is an example which shows that the insert screw hole was formed integrally with the reinforcing bar.

1, a primary seating portion 2 is formed on one side of the body of the reinforcing bar 1 to temporarily support the reinforcing bar, and one side of the primary seating portion 2 is significantly higher than the primary seating portion. Reinforcing bar groove portion (3) is formed. In addition, an insert screw hole 5 for fastening a ceiling plate mounting hole having a screw portion at a distal end thereof is formed downward in the lower center portion of the reinforcing bar, and the reinforcing bar is fixed to the formwork with nails at a predetermined position of the reinforcing bar 1. The nail insertion hole 4 for this is formed.

In addition, the outer peripheral surface of the reinforcing pedestal formed a plurality of weight loss grooves 7 to allow concrete to flow into the weight loss grooves when placing concrete, so as to reduce the weight of the reinforcement.

Thus, the weight loss groove portion has a large number, or should be made large in size, can support the heavy ceiling structure. In addition, there is a disadvantage that the shape is somewhat difficult to fabricate.

On the other hand, in the prior art, the insert combined reinforcing bar described in Korean Utility Model Registration No. 20-0172586 (filed September 22, 1999) is shown in FIG.

Referring to FIG. 2, the nut detachable bar-chair insert 10 includes a main body 11 having a through hole 14 formed at a central portion thereof, a leg portion 22 radially protruding from an outer circumferential surface of the main body 11, and a main body. Nut 15 is fastened to the inner upper portion of the 11, the upper cap 19 is coupled to the upper portion of the main body 11 to prevent the inflow of concrete, and the lower portion of the main body 11 is coupled to the main body ( 11) it is composed of a lower cap (17) for fixing.

The leg portion 22 includes wings 12 protruding from the outer circumferential surface of the main body 11 at predetermined lengths, respectively, and legs 21 protruding downward from the ends of the respective wings 12. Configured.

The leg part 22 has a predetermined area, so that the wing 12 has a predetermined area, and as the attachment area with the concrete becomes wider than the existing insert, the supporting force is increased. The lower end portion 21a of each leg 21 has a round shape, so that contact with the formwork is minimized. That is, in this prior art, the role of fixing the reinforcing bar 10 to the formwork is not the leg portion 22.

The lower cap 17 has a hat shape in which its central portion 18a protrudes upward, and a hole 18 is formed vertically downward to allow a nail or the like to penetrate the central cap 18a. The lower cap 17 is fixed by positioning the lower cap 17 in the formwork and driving the nail through the hole 18 into the formwork. That is, it is fixed to the formwork with nails.

The prior art has commonly formed a nail insertion hole in the reinforcing bar, and nailed to the upper surface of the formwork to be fixed. When placing concrete, in particular, when placing while vibrating with a vibrator, if the bottom surface of the reinforcing bar is not attached to the upper surface of the formwork and a predetermined gap occurs, the concrete water flows into the insert hole. Therefore, it must be firmly fixed with nails.

By the way, when reinforcing the reinforcement of the reinforcing bars in the upper and lower double, there is a case that additionally install the reinforcing bar, there is a problem that it is very difficult to perform the nailing process. This problem is particularly aggravated as building facility standards go toward embedding more rebar for safety and comfort purposes.

In addition, if a lot of nails to the plywood used for forming the formwork, since the possibility of breakage of the plywood in the process of dismantling the formwork after curing the concrete, there is also a problem that the replacement cost of the plywood increases.

In addition, to reinforce the reinforcing bars more than two times, an auxiliary reinforcing bar (or two-stage pedestal, also referred to as the upper reinforcing bar) is used. In the prior art, the shape of the auxiliary reinforcing bar resting on the primary reinforcing bar has a complicated structure.

As an example, as described in Korean Utility Model Registration No. 20-0323015, the lower reinforcement base and the lower reinforcement recess, the upper reinforcement settlement groove and the lower reinforcement settlement groove and the insertion groove are formed And a die inserting protrusion is formed to include an upper reinforcing bar coupled to the lower reinforcing bar, and a hanger, and the like, to which a locking piece and a locking protrusion are formed. In other words, the shape of the protrusion and the groove is made to be paired with each other for insertion, this has the disadvantage that the production is not easy.

The present invention to solve the above problems is to provide a reinforcing bar support that can be combined with the formwork plywood can be attached to the formwork plywood without fixing the nail during the concrete installation.

It is also an object of the present invention to provide an insert-based reinforcing bar pedestal, which is a simpler shape instead of a four-way groove or four leg shapes, and which does not fall out of the concrete slab even when a heavy ceiling structure is suspended.

Features of the present invention for this purpose, the lower body portion is formed with a hole 43 for the insert on the bottom surface (39); An upper body portion on which rebar is seated; In the insert reinforcing bar pedestal 30 including an intermediate body portion including the female threaded portion 41 of the insert between the upper body and the lower body, when the concrete is poured into the insert hole 43 of the lower body In order not to go, the sponge nonwoven double-sided tape is further attached to the bottom surface 39 of the lower body part.

A further feature of the invention is that in the intermediate body portion of the insert reinforcing bar pedestal 30, at least a portion of the periphery of the intermediate body from below the upper body portion 33 to the lower body portion 31 is concave 32. Formed.

Another feature of the present invention is that the female screw portion of the intermediate body portion is formed with a female screw insertion hole 41 into which the female screw 42 can be inserted laterally at least one of the circumferences 32 of the body portion. The hole 41 is formed so as to meet the insert hole 43 in the lower body part.

Another additional feature of the present invention is that the upper body portion has a protruding island (36, 37) shape structure, and includes an auxiliary reinforcing bar that is mounted on the upper body, the bottom portion 50 of the auxiliary reinforcing bar protruding from the upper body It is formed so that it can reach on the island (36, 37) and be placed in parallel; At least a portion of the lower edge 52 is formed to protrude downward from the outer portion of the upper body protruding islands 36 and 37 so that the auxiliary reinforcing bar is not detached.

Hereinafter, with reference to the accompanying drawings, it will be described in detail an embodiment of the insert combined reinforcement according to the present invention.

3 is a view showing an example of a combined reinforcing bar support according to the present invention. In FIG. 3, the insert combined reinforcing bar pedestal 30 includes a lower body part 31, an upper body part 33, and an intermediate body part 32.

Referring to the lower figure of FIG. 3, the lower body portion is provided with an insert hole 43 in its bottom surface 39. The shape of the bottom surface is a rectangle that is close to a square. Other shapes are possible. An object having a height such as a square, a rectangle, an ellipse, and the like can be stabilized. Since the rebar is heightened horizontally and vertically, a rectangle (3 cm, 4 cm) close to a square is preferable.

 It is preferable that the bottom surface 39 is flat, and even if it is bumpy as in the prior art, the characteristic configuration of the present invention can be applied as long as the double-sided tape can stick well.

A characteristic configuration in the present invention is to further apply a sponge nonwoven double-sided tape to the bottom surface 39 of the lower body. The sponge nonwoven type refers to a fiber material which is stretchable in the vertical direction. It is preferable to use colored sponge nonwoven fabric of double-sided tape. This is because colored non-woven fabrics can be easily found even after dismantling formwork, even when using construction-oiled formwork plywood.

As another example, the form plywood side backing of the double-sided tape may be used as colored. Since the reinforcing bar with double-sided tape is strongly pressed by the weight of the reinforcing bar, the reinforcing bar may not flow when placing concrete. When you remove the formwork, you can easily find the colored backing paper on the double-sided tape.

One side of the double-sided tape is attached to the bottom surface 39, and the other side is attached to the plywood of the formwork. When the rebar is laid, it tends to bend slightly due to its own weight. In addition, workers may bend by stepping on the reinforcement supported by the reinforcing bar support during work. In this case, the rigid reinforcing bar 30 is also inclined to one side. The sponge acts as a buffer for this force, and attaches the entire bottom surface 39 of the reinforcing bar to the entire plywood, thereby maintaining close contact with the plywood before and after concrete pouring.

The role of the non-woven double-sided tape serves as a stopper to prevent the concrete from entering the hole 43 for the male thread insert, and also serves to fix the reinforcing bar 30 to the formwork. In addition, the nonwoven fabric of the double-sided tape also has the advantage of being easier to remove than a nail when inserting a male thread.

The upper body portion of the reinforcing bar 30 has a protruding structure in which rebar can be seated. Such a protruding shape structure may use various shape structures conventionally known. In FIG. 3, the shape structure of four protruding islands 36, 37, and the like is disclosed. The lower end 33 of the upper body portion needs to correspond to the shape of the lower body portion 31, and is shown as a rectangle close to the square. Similarly, the lower end 33 of the upper body can have a variety of shapes, but may be any shape that can form a concave groove of the lower intermediate body.

The intermediate body portion between the lower end 33 of the upper body portion and the lower body portion 31 is formed concave along its circumference. When concrete hardens slightly, it is necessary to form concave rather than the conventional vertical reinforcing bar side surface. Even if it is formed convexly along the periphery of the intermediate body part, the insert double reinforcing bar may not be separated from the concrete after the form dismantling, but preferably forms a concave groove.

In addition, even if only a portion of the periphery of the intermediate body portion is formed concave, the reinforcing bar 30 may not fall below the ceiling after dismantling the formwork. In order to reduce the weight of the reinforcing bar 30, the entire circumference is preferably formed to be concave 32.

On the other hand, if the material of the reinforcing bar 30 is made of aluminum instead of plastic, the ceiling may not sag even under oxidative corrosion or fire.

A female screw insertion hole 41 for inserting the female screw 42 sideways is formed in at least one of the circumferences of the intermediate body portion. The female screw insertion hole 41 is formed to meet the insert hole 43 of the lower body part. Here, the size of the insert hole 43 is smaller than the size of the female screw 42. After the female screw is located in the intermediate body portion, the concrete blocks the female screw insertion hole 41.

Thus, the female screw 42 can be placed without falling into the center of the reinforcing bar before installation of the reinforcing bar, and the male screw can be coupled to the female screw through the insert hole 43 after dismantling the formwork. The female screw 42 may be integrally formed on the combined reinforcing bar but may be distributed to the workshop after being installed.

Figure 4 is a view showing an example of the reinforcing bar including the auxiliary reinforcing bar according to the present invention.

As can be seen in Figure 4, the secondary reinforcing bar for the upper reinforcement, which can vary the height of the rebar installation is used to be mounted on the primary (lower reinforcing bar) reinforcing bar (30). 4 shows a perspective view of the primary reinforcing bar and the auxiliary support, and a perspective view from below of the primary reinforcing bar.

In an example of the present invention, the upper body portion of the primary reinforcing bar 30 has a protruding island (36, 37) shape structure. That is, the first groove 34 having a semi-cylindrical shape is formed so that the rebar is seated in the direction in which the first reinforcing bar is placed among the lower reinforcing bars, and the locking wefts 36 are formed along both sides of the first groove so that the seated rebar does not roll out; 37) is formed.

3 and 4 together, a second groove 35 is formed in the middle portion of the locking embankment so that the second reinforcing bar can be placed in the direction perpendicular to the first reinforcing bar. The cross section of the second groove is semicircular along the shape of the rebar. Thus, the respective engaging dams on both sides of the first groove are bisected to form all four protruding islands.

The upper surfaces of the four protruding islands 36 and 37 are preferably flat because the bottom portion 50 of the auxiliary reinforcing bar is placed thereon. The bottom portion 50 of the auxiliary reinforcing bar is formed so as to be placed on the upper surface of the protruding islands 36 and 37 so as to be placed in parallel, and when the upper surface of the protruding islands 36 and the like is flat, it becomes flat.

In addition, at least a portion of the lower edge 52 of the bottom of the auxiliary reinforcing bar is directed downward from the outside of the upper body protruding islands 36 and 37 so that the auxiliary reinforcing bar is not separated from the primary reinforcing bar 30. It is formed to protrude. A preferred example of such a shape is shown on the right side of FIG.

As an example of the modification of the bottom of the auxiliary reinforcing bar, a semi-circular (reinforcing bar) groove may be formed in the pair of protruding surfaces 52 facing each other in the edge. In this case, it is possible to place the reinforcing bar on the primary reinforcing bar, and then place the auxiliary reinforcing bar on it.

And, the height of the auxiliary support for height adjustment can be produced in various ways, such as 1cm, 2cm, 3cm. The upper body portion of the auxiliary pedestal can also be produced in various ways, Figure 4 shows the shape of the four protruding islands similar to the primary reinforcing bar 30 as an example.

Using the combined insert reinforcement bar according to the present invention as described above, the installation and removal process of the nail is reduced, there is an effect that can reduce the work time and labor costs. In addition, since the colored double-sided tape can be used easily, the insert hole can be easily found, thereby reducing the work time.

Combined reinforcing bars using nails on the floor plywood require more work during the form dismantling process and are more likely to break the form plywood. Statistically, in the case of using nails, the plywood can be used only about five times, whereas using a double reinforcing bar including the double-sided tape according to the present invention has the effect of using the formwork plywood up to about ten times.

In addition, when placing additional reinforcing bars or installing additional reinforcing bars after the reinforcing bar work, it is possible to install the reinforcing bars of the present invention even where a pedestal using a conventional nail cannot be made due to the narrow space. It works.

In addition, by forming a concave groove along the periphery of the intermediate body, and the material of the reinforcing bar is made of aluminum, there is a rigid effect not to fall out of the concrete even for a heavier ceiling installation.

Further, since the bottom surface of the reinforcing bar is preferably square, there is also an effect that can stably support the reinforcing bar, and since the reinforcing bar support can also be used, the reinforcing bar may be arranged in double or triple. In particular, since it provides an auxiliary reinforcing bar of a simpler shape, there is an effect that becomes easier to manufacture.

Claims (4)

A lower body portion having an insert hole formed at a bottom thereof; An upper body portion on which rebar is seated; In the insert reinforcing bar pedestal comprising an intermediate body including a female threaded portion of the insert between the upper body and the lower body, The non-woven double-sided tape is further attached to the bottom surface of the lower body so that concrete does not enter the concrete when the concrete is inserted into the insert hole of the lower body. The method of claim 1, wherein the intermediate body portion, At least a portion of the circumference of the intermediate body from below the upper body to the lower body is formed concave, insert reinforcing bar pedestal. According to claim 1 or 2, wherein the female screw portion of the intermediate body portion, A female screw insertion hole capable of inserting a female screw sideways to at least one of the circumferences of the body portion is formed, wherein the female screw insertion hole is formed to meet the insert hole of the lower body, wherein the insert double reinforcing pedestal. The method according to claim 1 or 2, The upper body portion is a protruding island shape structure, An auxiliary reinforcing bar rested on the upper body part, wherein a bottom portion of the auxiliary reinforcing bar rests on the protruding island of the upper body part so as to be mounted in parallel; The insert reinforcing bar pedestal, characterized in that it further comprises a secondary reinforcing bar, protruding downward from the outer portion of the upper body protrusion island, so that the auxiliary reinforcing bar is not detached.

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