KR101496355B1

KR101496355B1 - The coupling and anchoring devices for reinforcing bar

Info

Publication number: KR101496355B1
Application number: KR20140069900A
Authority: KR
Inventors: 홍석희
Original assignee: 홍석희
Priority date: 2014-06-10
Filing date: 2014-06-10
Publication date: 2015-03-02

Abstract

The present invention relates to a device for connecting and anchoring modified steel bars to reinforce the strength of a reinforced concrete structure, in which both ends of the both modified steel bars to be connected are easily connected to each other or are firmly anchored to a part. The device includes: a first frictional plate (10) formed on the inner surface with a joint groove (101) corresponding to a joint (1a) of a steel bar, and engaged to the outer surface of one side of the steel bar along a rib (1b) of the steel bar; a second frictional plate (20) formed on the inner surface with a joint groove (201) corresponding to the joint (1a) of the steel bar, and engaged to the outer surface of the other side of the steel bar along a rib (1b) of the steel bar; a first sleeve (30) engaged to the outer surface of the first frictional plate (10), and formed with a flange (303) at an end thereof in a circumferential direction; a second sleeve (40) engaged to the outer surface of the second frictional plate (20), and formed with a flange (403) at an end thereof in a circumferential direction; and a pressing fastener (50) for pressing and fixing the flange (303) of the first sleeve (30) and the flange (403) of the second sleeve (40) in a proximity state.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a reinforcing bar,

The present invention relates to a device for connecting a deformed reinforcing bar to be used for reinforcing the strength of a concrete structure acting on an axial direction force due to tension and compression as well as a bending moment or for fixing a reinforcing bar to a member end, And more particularly, to a reinforcing bar connection and fixing device that can assemble and fix a deformed reinforcing bar at both end portions of both deformed reinforcing bars very easily and firmly.

The concrete is a composite composition composed of cement, sand, gravel, water, etc. mixed at a suitable ratio. Although the compressive strength is comparatively high, the tensile strength is very low compared with the compressive strength and has a mechanical characteristic that cracks are likely to occur.

Generally, when constructing a concrete structure with such mechanical characteristics, bending moment, tensile stress and compressive axial force are generated, and tensile and compressive stresses caused by such forces are resisting cracks and buckling To reinforce the strength, concrete is placed in the form of reinforcing steel, and concrete is laid. These conventional reinforced concrete structures are excellent in compression and tensile strength and can be applied to various types of structures, and their mechanical properties are excellent, so they are widely used in various construction and civil engineering works.

The reinforcing bar used for the reinforcing concrete is a deformed reinforcing bar (hereinafter referred to as a reinforcing bar). This deformed reinforcing bar means that a node is formed on the surface, and a node in the axial direction is generally referred to as a rib and a node in the circumferential direction is referred to as a node.

In order to install a conventional concrete form, it is necessary to arrange the reinforcing bars in a predetermined shape. Since the reinforcing bars are generally manufactured in a standardized length, it is necessary to interconnect the reinforcing bars of a predetermined length during the laying work, These existing reinforcing bar connection methods are mainly proposed as lap joint method, weld joint method, screw joint method, and mechanical joint joining method.

The folding method is a method in which a wire is wound around a part of the end portion of the reinforcing bars overlapped with each other to connect the reinforcing bars to each other. However, since the reinforcing bars need to be wound around the reinforcing bars, It is pointed out that there is a problem that the cost of construction is increased due to deterioration of quality and increase of the amount of rebar.

The weld joint method is a method of welding the end portions of the reinforcing bars against each other, and the amount of the rebar can be reduced rather than the folding method due to a short connecting portion. However, there is a problem that separate equipment such as a welding machine is required, There is a problem in the safety because the strength is lowered at the joint portion joined by the welding heat.

The threading method is a method of threading the connecting ends of reinforcing bars and connecting them using a coupler. In order to process threads at the connecting ends, the reinforcing bars are manufactured at a manufacturing factory equipped with separate facilities, There is a problem that the cost increases due to the increase in the process and the thread is processed in a state in which the reinforcing bar is bent in the cross section by the rolling, so that the process becomes complicated and the strength is lowered and the construction is impossible in a narrow space.

The mechanical connection method is a method of connecting reinforcing bars to each other by using a mechanical connection device such as a sleeve compression, a mortar filling, and a wedge type. In the above-described prior art, a reinforcing flow phenomenon occurs in the connecting device, There is a problem that the tensile force is lowered, the number of parts constituting the connecting device is large, the structure is complicated, the cost for producing the product is high, and the work takes a lot of time.

Also, since the conventional mechanical connecting device is uniformly applied according to the reinforcing steel standard irrespective of the shape and size of the acting force, there is a problem that the construction cost increases due to an increase in the standard cross-section.

Meanwhile, in a series of conventional reinforced concrete structures, members such as bases, walls, pillars, girders, slabs, and the like are rigidly joined to form a framework. In order to satisfy the mutual reinforcement structure, The reinforcing bars to be joined to each other must be mutually continuous and overlapped.

In the case where reinforcing bars are to be strongly fixed to the ends of members such as bases, walls, columns, girders, slabs, and the like, the reinforcing bars are continuously arranged without overlapping the fixing devices, There is a problem that the construction cost is increased due to an increase in the quantity.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a reinforcing bar connection and fixing device capable of maintaining a firm connection and a fixing state even in a simple assembling process when the ends of both reinforcing bars are connected to each other or the reinforcing bar is directly fixed to a member end will be.

In particular, the present invention relates to a friction stir welding method and a friction stir welding method in which a reinforcing plate interposed between a reinforcing bar and a sleeve is applied with a sufficient pressing force to implement a strong unity of both reinforcing bars, By attaching the disk, it is possible to reduce the cross-sectional area of the friction plate and the sleeve and secure the clearance between the reinforcements by realizing the action of reinforcing the reinforcement of the end of the member without increasing the pressure and the frictional force. This can be used for securing the quality, fastening with simple equipments and manpower, confirming the fastening force, greatly reducing the material cost due to the reinforcement superposition, and reducing the construction cost by applying the enemy according to the shape and size of the acting force. And a fixing device for fixing the reinforcing bar.

In order to achieve the above object, the present invention is characterized in that, in the inner surface, a node groove 101 having a shape corresponding to a node 1a of a reinforcing bar is formed, and a first A friction plate (10); A second friction plate 20 formed on an inner surface thereof with a node groove 201 of a shape corresponding to the node 1a of the reinforcing bar and coupled to the other outer surface of the reinforcing bar about the rib 1b of the reinforcing bar; A first sleeve 30 coupled to an outer surface of the first friction plate 10 and having a flange 303 at a circumferential end thereof; A second sleeve 40 coupled to an outer surface of the second friction plate 20 and having a flange 403 at a circumferential end thereof; And a pressing fastener (50) for pressingly fixing the flange (303) of the first sleeve (30) and the flange (403) of the second sleeve (40) in close proximity to each other.

The first and second friction plates (10, 20) are provided with locking protrusions (103, 203) protruding radially outwardly; The first and second sleeves 30 and 40 may further have through holes 301 and 401 through which the locking protrusions 103 and 203 pass.

The first and second friction plates 10 and 20 are screwed on the outer surfaces of the engaging protrusions 103 and 203 and the engaging protrusions 103 and 203 passing through the first and second sleeves 30 and 40 are screwed And a tightening nut 60 to be coupled.

In addition, the first and second sleeves 30 and 40 may have protrusions formed on one side of the outer surface of the first and second sleeves 30 and 40 in the circumferential direction to increase frictional force with concrete.

The present invention improves the workability of the parts, the simplicity of the structure, and the simplicity of the assembling work, so that the connecting and fixing work of the reinforcing bars at the work site can be performed concisely and promptly so that the assembling workability as well as the spacing So that the structural quality of the reinforced concrete can be improved.

In addition, since the optimized number of components and the assembled structure can be applied according to the shape and size of the tensile force or compressive force acting on the reinforcing bar, it is possible to reduce the manufacturing cost of the connecting device according to the manufacturing environment, Simplification and labor costs can be saved.

In addition, since a simple mechanism such as a wrench can be used for connecting the reinforcing bar and the fixing device, it is easy to install, the pressing force can be easily confirmed during the connection and fixing operation, and unnecessary It is possible to greatly reduce the connection and settlement time.

In addition, since the separate process of arbitrarily bending or superimposing the reinforcing bars laid on the members is eliminated when the members and the reinforcing bars are tilted, it is possible to reduce costs due to the reduction of the amount of reinforcing bars, It is possible to secure the excellent quality of concrete.

1 is an assembled perspective view of a reinforcing bar connecting apparatus according to a first embodiment of the present invention;
Figure 2 is an exploded perspective view of Figure 1;
Figure 3 is a cross-sectional view of Figure 1;
4 is an assembled perspective view of a reinforcing bar connecting apparatus according to a second embodiment of the present invention;
Fig. 5 is an exploded perspective view of Fig. 4; Fig.
Figure 6 is a cross-sectional view of Figure 4;
7 is a cross-sectional view showing a modified example according to the second embodiment of the present invention.
FIG. 8 is an assembled perspective view of a reinforcing bar connecting apparatus according to a third embodiment of the present invention. FIG.
Fig. 9 is an exploded perspective view of Fig. 8; Fig.
Figure 10 is a cross-sectional view of Figure 8;
11 is an assembled perspective view of a reinforcing bar fixing apparatus according to a fourth embodiment of the present invention.

The features and advantages of the present invention described above or not described above will be more apparent from the following description of embodiments of the present invention with reference to the accompanying drawings.

1 to 3 are perspective views showing assembled assemblies of a reinforcing bar connection apparatus according to a first embodiment of the present invention.

First, reinforcing rods (1, 1 ") used to reinforce the strength of the reinforced concrete structure are formed with nodules (1a) protruding in the circumferential direction on the surface thereof at regular intervals in the axial direction, (1b) are formed at intervals of 180 degrees in the circumferential direction.

The reinforcing bar connecting and fixing device according to the first embodiment for connecting the reinforcing bar 1, 1 "having such a configuration includes the friction plates 10 and 20, the sleeves 30 and 40, and the pressure tightening fitting 50 .

The friction plates 10 and 20 are members joined to both ends of the reinforcing bars 1 and 1 "for connection, and are constituted by a first friction plate 10 and a second friction plate 20 each having a semi-cylindrical shape.

The first friction plate 10 is tightly engaged with one outer surface of the reinforcing bar 1, 1 "(the upper right as shown in the figure) around the rib 1b of the reinforcing bar 1, 1". As a result, a node groove 101 having a shape corresponding to the node 1a of the reinforcing bar 1, 1 " is formed on the inner surface.

The second friction plate 20 is tightly engaged with the other outer surface of the reinforcing bar 1, 1 " about the rib 1b of the reinforcing bar 1, 1 " Also, a node groove 201 having a shape corresponding to the node 1a of the reinforcing bar 1, 1 " is formed on the inner surface.

The first and second friction plates 10 and 20 are preferably made of cast metal when tensile force acts on the reinforcing bars 1 and 1 ' A reinforcing fiber sheet, a cement paste sheet, or the like. As described above, the first and second friction plates 10 and 20 may be formed of one of metal, synthetic resin, reinforcing fiber, mortar, and cement paste.

The sleeves 30 and 40 are members for pressing and fixing the first and second friction plates 10 and 20 to the reinforcing bars 1 and 1 ", and the first and second sleeves 30 and 30, 40).

The first sleeve 30 is tightly coupled to the outer surface of the first friction plate 10, and a flange 303 is formed at a circumferential end of the first sleeve 30 so as to extend in a radial direction. The flange 303 is provided with a fastening hole to which the press fastener 50 is fastened.

The second sleeve 40 is in tight contact with the outer surface of the second friction plate 20, and a flange 403 is formed at the circumferential end of the second sleeve 40 in a radial direction. Similarly, the flange 403 is provided with a fastening hole to which the press fastener 50 is fastened.

As a result, the first and second sleeves 30 and 40 come into close contact with each other about the reinforcing bars 1 and 1 " in accordance with the fastening of the pressing fasteners 50 fastened to the mutually facing flanges 303 and 403, The first and second friction plates 10 and 20 are pressed inward in the normal direction.

The press fastener 50 is a member for pressing and fixing the first and second sleeves 30 and 40 in close proximity to each other as described above. And a bolt and a nut fastened through the through hole.

The cooking process of the reinforcing bar connecting device is performed by firstly grasping one side outer side (upper side) and the other side outer side (bottom side) of the reinforcing bars 1, 1 " about the ribs 1b, And the first friction plate 10 and the second friction plate 20 are closely contacted to each other at a lower portion (lower portion). As a result, the nail 1a formed on the reinforcing bars 1, 1 'is inserted into the nail groove 101, 201 of the first and second friction plates 10, 20 and brought into close contact with each other.

Thereafter, the first sleeve 30 is brought into close contact with the outer surface of the first friction plate 10, and the second sleeve 40 is brought into close contact with the outer surface of the second friction plate 20.

Then, the first and second sleeves 30 and 40 are fastened through the fastening holes formed in the facing flanges 303 and 403 of the first and second sleeves 30 and 40 to fasten the first and second sleeves 30 and 40. That is, the first and second sleeves 30 and 40 press the first and second friction plates 10 and 20 interposed between the bolts and the nut in the normal direction of the reinforcing bars 1 and 1 ' .

In the reinforcing bar connecting and fixing device having such a constitution, basically, both ends of the reinforcing bars 1, 1 "are inserted into the nose grooves 101 and 201 of the first and second friction plates 10 and 20, (1, 1 ") by increasing the frictional force against the compressive and tensile forces acting on the reinforcement (1, 1").

4 to 6 are perspective views of assembled reinforcing bars according to a second embodiment of the present invention.

The reinforcing bar connecting and fixing device according to the second embodiment for connecting the reinforcing bar 1, 1 "also comprises the friction plates 10 and 20, the sleeves 30 and 40, and the pressure fastening fitting 50 similar to the first embodiment. The operation description of the same components as those of the first embodiment described above will be omitted.

According to the second embodiment, however, locking protrusions 103 and 203 are protruded radially outward from the outer surfaces of the first and second friction plates 10 and 20, and the first and second sleeves 30 and 40 are provided with first, The through holes 301 and 401 through which the engagement protrusions 103 and 203 of the two friction plates 10 and 20 pass are formed.

The locking protrusions 103 and 203 are disposed on the outer surfaces of both end portions of the first and second friction plates 10 and 20 so as to be positioned at both ends of the reinforcing bars 1 and 1 & And may be formed in a variety of cross-sectional shapes without being limited to the circular cross-section as shown in the drawings.

The engaging protrusions 103 and 203 formed on the first and second friction plates 10 and 20 in the process of bringing the first and second sleeves 30 and 40 into close contact with the outer surfaces of the first and second friction plates 10 and 20, Through holes (301, 401) formed in the two sleeves (30, 40).

On the other hand, FIG. 7 shows another modification according to the second embodiment. Referring to FIG. 7, the embossments 103 "and 203" are radially outwardly formed on the outer surfaces of the first and second friction plates 10, And the dimples 301 "and 401" for inserting the embossments 103 " and 203 "are formed on the inner surfaces of the first and second sleeves 30 and 40, respectively.

The engaging protrusions 103 and 203 or the embossments 103 " and 203 "of the first and second friction plates 10 and 20 formed in a direction orthogonal to the tensile force acting on the reinforcing bars 1 and & The first and second sleeves 30 and 40 and the first and second friction plates 30 and 40 are inserted into the through holes 301 and 401 or the dimples 301 and 401 of the first and second friction plates 30 and 40, 30,40) and further increase the frictional force on the tensile force acting on the reinforcing bars (1,1 ") to further increase the connecting rigidity of the reinforcing bars (1,1").

8 to 10 are assembly perspective views of a reinforcing bar connecting apparatus according to a third embodiment of the present invention.

The reinforcing bar connection and fixing device according to the third embodiment for connecting the reinforcing bar 1, 1 "is similar to the reinforcing bars 10 and 20, the sleeves 30 and 40, 50. Operation descriptions for the same components as those of the first embodiment described above will be omitted.

According to the third embodiment, however, locking protrusions 103 and 203 protrude radially outward from the outer surfaces of the first and second friction plates 10 and 20, and the first and second sleeves 30 and 40 are provided with the first, 2 through which the engaging projections 103 and 203 of the first and second friction plates 10 and 20 pass are formed on the outer surface of the engaging projections 103 and 203 and the first and second sleeves 30 and 40 And a tightening nut 60 screwed to the engaging protrusions 103 and 203 which penetrate through the fastening protrusions 103 and 203.

The locking protrusions 103 and 203 are disposed on the outer surfaces of both end portions of the first and second friction plates 10 and 20 so as to be positioned at both ends of the reinforcing bars 1 and 1 & As shown in FIG.

The engaging protrusions 103 and 203 formed on the first and second friction plates 10 and 20 in the process of bringing the first and second sleeves 30 and 40 into close contact with the outer surfaces of the first and second friction plates 10 and 20, Through the through holes 301 and 401 formed in the two sleeves 30 and 40 and then the first and second friction plates 10 and 20 passing through the through holes 301 and 401 of the first and second sleeves 30 and 40 The first and second sleeves 30 and 40 and the first and second friction plates 10 and 20 are fixed to the engaging protrusions 103 and 203 of the first and second friction plates 10 and 20 in the normal direction So as to be brought into close contact with each other.

In the case where the tightening nut 60 is screwed to the engagement protrusions 103 and 203 of the first and second friction plates 10 and 20 penetrating the first and second sleeves 30 and 40, The first and second friction plates 10 and 20 are strongly urged in the normal direction of the reinforcing bars 1 and 1 ' It is possible to further increase the connection rigidity of the connecting portion.

Meanwhile, in the assembling process of the reinforcing bar connection apparatus according to the third embodiment, the worker is required to engage the first and second friction plates 10 and 20 through the through holes 301 and 401 of the first and second sleeves 30 and 40 And the operation of tightening the pressing fastener 50 fastened to the flanges 303 and 403 of the first and second sleeves 30 and 40 are alternately performed, The first and second sleeves 10 and 20 and the first and second sleeves 30 and 40 can be further strongly urged in the direction of the normal line of the reinforcing bars 1 and 1 ", so that the rigidity of the reinforcing bar connecting device can be further increased.

As described with reference to the first, second and third embodiments, the present invention is applicable to, for example, a reinforcing concrete in which only a small tensile force or a compressive force is required, the first embodiment described above, It is preferable to apply the second embodiment in the case of the reinforced concrete to be used and the third embodiment in the case of the reinforced concrete in which a relatively large tensile force is required.

As a result, according to the present invention, it is possible to selectively apply the optimum assembled parts according to the magnitude of the bending moment, tensile force, and compressive force required for the reinforced concrete, thereby simplifying the assembling process and achieving operation compatibility.

11 is a perspective view illustrating an assembled perspective view of a reinforcing bar fixing apparatus according to a fourth embodiment of the present invention.

As shown in the figure, the first and second sleeves 30 and 40 constituting the reinforcing bar connection and fixing device are formed at one side of the outer surface with the shock-absorbing friction disks 305 and 405 protruding in the circumferential direction.

The shrinking friction discs 305 and 405 can be used as the connecting device including the reinforcing bars 1,1 '' in the state where the reinforcing bars 1 and 1 ' By increasing the pressure and friction force with concrete, it is possible to secure an excellent strength condition for reinforced concrete.

In addition, since the first and second sleeves 30 and 40 are integrally provided with the friction pressure discs 305 and 405, it is possible to prevent the reinforcing bars, which are placed on the members, from being stuck to the members such as the base, the wall, the column, the girder, It is possible to eliminate a separate process of arbitrarily bending or superimposing, thereby reducing the cost due to the reduction of the amount of reinforcing bars, facilitating compaction by securing the spacing of the reinforcing bars, When the concrete installation is completed after the completion of the laying work of the fixing device, a larger ground pressure is generated by the shi pressure frictional discs 305 and 405, thereby increasing the frictional force between the connecting device including the reinforcing bars and the concrete, An excellent strength state can be ensured between the structural members.

Here, the reinforcing bar connection and fixing device shown in FIG. 11 is shown in a structure corresponding to that shown in FIGS. 1 to 3, but the second and third embodiments can be applied according to the shape and size of the required connection load Of course.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims and their equivalents. Of course, such modifications are within the scope of the claims.

1,1 ": Rebar 1a: Node
1b: rib 10: first friction plate
101: Nest groove 103:
20: second friction plate 201: nod groove
203: locking protrusion 30: first sleeve
301: Through hole 301 ": Embo
303: Flange 305: Shiatsu friction disc
40: second sleeve 401: through hole
401 ": dimple 403: flange
405: Shiatsu friction disc 50: Pressurizing fastener
60: Fastening nut

Claims

A first friction plate 10 formed on an inner surface thereof with a node groove 101 having a shape corresponding to the node 1a of the reinforcing bar and coupled to one outer surface of the reinforcing bar about the rib 1b of the reinforcing bar;
A second friction plate 20 formed on an inner surface thereof with a node groove 201 of a shape corresponding to the node 1a of the reinforcing bar and coupled to the other outer surface of the reinforcing bar about the rib 1b of the reinforcing bar;
A first sleeve 30 coupled to an outer surface of the first friction plate 10 and having a flange 303 at a circumferential end thereof;
A second sleeve 40 coupled to an outer surface of the second friction plate 20 and having a flange 403 at a circumferential end thereof; And
And a pressing fastener (50) for pressing and fixing the flange (303) of the first sleeve (30) and the flange (403) of the second sleeve (40)
On the outer surfaces of the first and second friction plates (10, 20), locking protrusions (103, 203) protrude radially outwardly;
Wherein the first and second sleeves (30,40) are formed with through holes (301,401) through which the locking projections (103,203) pass.

delete

The method according to claim 1,
Screws are formed on the outer surfaces of the engaging protrusions 103 and 203 formed on the first and second friction plates 10 and 20 and the engaging protrusions 103 and 203 passing through the first and second sleeves 30 and 40 are screwed And a fastening nut (60) which is fastened to the fastening member.

The method according to claim 1,
Embosses 103 "and 203" protrude radially outward from the outer surfaces of the first and second friction plates 10 and 20;
Wherein dimples 301 "and 401 " for inserting the embossments 103 " and 203" are formed on the inner surfaces of the first and second sleeves 30 and 40, respectively.

The method according to claim 1,
Wherein the first and second sleeves (30, 40) have protrusions formed on one side of the outer surface of the first and second sleeves (30, 40) in a circumferential direction to increase frictional force with concrete.