JP7026362B2 - Deformed reinforcing bar connecting metal fittings - Google Patents

Description

The present invention relates to a deformed reinforcing bar connecting metal fitting, and more particularly to a deformed reinforcing bar connecting metal fitting capable of connecting two separated deformed reinforcing bars.

In general, concrete has a relatively high compressive strength, but its tensile strength is lower than the compressive strength, so that it is easy to crack.

As a result, in order to increase the tensile strength of the concrete, the tensile strength of the concrete is reinforced by placing the concrete after binding the reinforcing bars in the mold into which the concrete is placed.

Since such existing reinforced concrete structures are excellent in compressive strength and tensile strength, not only can a wide variety of structures be constructed, but also they are excellent in physical properties, so that various construction and civil engineering works can be carried out. Widely used in.

On the other hand, examples of reinforcing bars used in reinforced concrete include circular reinforcing bars and deformed reinforcing bars. Circular reinforcing bars are those having no knots on the surface of the reinforcing bars, and deformed reinforcing bars have knots and ribs on the surface of the reinforcing bars. Refers to something that has.

The knots are projected on the surface of the reinforcing bar in the circumferential direction of the reinforcing bar, and the ribs are projected in the axial direction of the reinforcing bar.

Deformed reinforcing bars have the advantage of having greater adhesion to concrete than circular reinforcing bars and the width of cracks becoming smaller when cracks occur in concrete. Therefore, in general, deformed reinforcing bars are not used for the main reinforcing bars. Is used.

Deformed reinforcing bars have the advantage that they have a greater adhesion to concrete than circular reinforcing bars, and the width of the cracks becomes smaller when the concrete cracks.

First, in order to build a concrete structure, reinforcement work is performed to arrange deformed reinforcing bars in a predetermined shape before placing concrete, but deformed reinforcing bars are generally manufactured to a standardized length. Along with this, there is no need to connect deformed reinforcing bars of a predetermined length during reinforcement arrangement work, and as such existing reinforcing bar connection methods, mainly lap joints, welded joints, screw joints, connecting devices A method of joining has been proposed.

The method of the lap joint is a method of winding a wire around the end of the stacked deformed reinforcing bars and joining them together, and although there is an advantage that the bar arrangement work is relatively easy to be performed, the wire is individually attached to each deformed reinforcing bar. Not only is the work complicated because it is forced to be wrapped around the wire, but there is also a safety problem because the bending strength at the joints is weak.

On the other hand, the method of the welded joint is a method of butt-welding the ends of the deformed reinforcing bars, and although there is no problem because the strength of the jointed portion is good, the work is very complicated and moreover. There was a problem that construction was delayed because it took a long time.

In addition, the screw joint method is a method in which a screw is machined and joined to the joint end of a deformed reinforcing bar, and equipment for processing the joint end is required, and construction can be performed in a narrow space. There is a disadvantage that it is impossible.

Further, the method of connecting device joint is a method of connecting both ends of deformed reinforcing bars using a connecting device, but the existing connecting device has a large number of parts and a complicated structure, so that the cost associated with product production is high. There was a problem that the labor cost was soaring as well as the cost was high and the work took a long time and the construction was delayed.

On the other hand, as the prior art of the present invention, Patent Document 1: Korean Patent Application No. 10-2018-0062562 "Deformed Reinforcing Bar Coupler" has been filed and registered. A case in which the knots of the above are projected and the deformed reinforcing bars arranged so that the ends face each other are housed, and a locking claw is formed on the inner peripheral surface, and one body bonded to the end of the deformed reinforcing bar and one body. It comprises a other piece and a fixing band coupled to the central portion of the one body and the central portion of the other piece, the peripheral portion of which is supported by the locking claw.

Korean Patent Application No. 10-2018-0062562 "Deformed Reinforcing Bar Coupler" Korean Patent Registration No. 10-1945475 (February 8, 2019)

Therefore, in order to solve the above-mentioned problem, the present invention simplifies the work when connecting two deformed reinforcing bars for the reinforcement work of the reinforcing bars, and moves to a place where the two deformed reinforcing bars are joined. The purpose is to provide a deformed reinforcing bar connecting metal fitting that can increase the bending strength of the steel bar.

Another object of the present invention is to provide a deformed reinforcing bar connecting metal fitting that can shorten the joining work time and shorten the construction period when connecting two deformed reinforcing bars for the reinforcing bar arranging work. That is.

Still another object of the present invention is to provide a deformed reinforcing bar connecting metal fitting that allows an operator to visually confirm whether or not the reinforcing bar connecting metal fitting is completely bound to the end of the deformed reinforcing bar.

The deformed reinforcing bar connecting metal fitting according to the present invention for achieving the above object is the deformed reinforcing bar connecting metal fitting that binds two deformed reinforcing bars separated from each other during the reinforcing bar arrangement work using the deformed reinforcing bar. The reinforcing bar connecting metal fittings are provided between the two deformed reinforcing bars to be joined, but the main holes (Main Hall) are machined on one side and the other side of the two deformed reinforcing bars facing each other, and one of them is formed. A fuselage in which a partition partition wall is formed between a main hole machined in a surface and a main hole machined in the other surface, and a cap (Cap) screwed into a pair of main holes machined in the body. ), A first deformed reinforcing bar passing hole whose inner peripheral surface is tapered so that the deformed reinforcing bar can pass through the center of the cap, and a hole provided inside the main hole. It is provided with a binding means for binding the deformed reinforcing bar and the cap by being sandwiched in the gap between the first deformed reinforcing bar passing hole and the deformed reinforcing bar when the cap is pulled into the main hole.

The deformed reinforcing bar connecting metal fitting according to the present invention having such a structure can be described by inserting the end of the deformed reinforcing bar into the main hole through the first deformed reinforcing bar passing hole and then completely screwing the cap. The binding means is interlocked with the cap that moves backward inside the main hole, and is firmly sandwiched in the gap between the first deformed reinforcing bar passing hole and the deformed reinforcing bar, and the deformed reinforcing bar and the deformed reinforcing bar connecting metal fitting are separated. To prevent it from being done.

Therefore, the operator can fit the two deformed reinforcing bars into the pair of main holes and join the two deformed reinforcing bars separated from each other into one.

The deformed reinforcing bar connecting metal fittings that operate based on such a structure and operating principle simplify the work when connecting two deformed reinforcing bars for the reinforcement work of the reinforcing bars, and the two deformed reinforcing bars are joined together. Bending strength to points can be increased.

INDUSTRIAL APPLICABILITY When two deformed reinforcing bars are joined together for reinforcing bar arrangement work, the present invention can shorten the joining work time and shorten the construction period.

Further, in the present invention, it is possible for the operator to visually confirm whether or not the reinforcing bar connecting metal fitting is completely bound to the end of the deformed reinforcing bar.

It is a phase diagram in which two deformed reinforcing bars are joined together according to the present invention. It is a perspective view of the assembled state of this invention. It is an exploded perspective view of this invention. It is an exploded sectional view of this invention. It is a perspective view of the cap provided in this invention. It is sectional drawing which cut out the cap provided with this invention along AA'. It is a perspective view of the intermediate fitting member. It is sectional drawing which cut out the intermediate fitting member along BB'. It is a perspective view of a stopper. It is sectional drawing which cut out the stopper along CC'. It is a state diagram in which the end of the wedge-shaped locking member and the stopper whose front end is tapered (Taper) are in contact with each other. It is a state diagram in which the end of the wedge-shaped locking member and the intermediate fitting member whose front end is tapered (Taper) are in contact with each other. It is a figure for demonstrating the process of binding a deformed reinforcing bar to a deformed reinforcing bar connecting metal fitting. It is a figure for demonstrating the process of binding a deformed reinforcing bar to a deformed reinforcing bar connecting metal fitting. It is a figure for demonstrating the process of binding a deformed reinforcing bar to a deformed reinforcing bar connecting metal fitting.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIGS. 1 to 4, the deformed reinforcing bar connecting metal fitting C according to the present invention is a deformed reinforcing bar that binds two deformed reinforcing bars D separated from each other during the reinforcing bar arrangement work using the deformed reinforcing bar D. In the connecting metal fitting C, the deformed reinforcing bar connecting metal fitting C is provided between the two deformed reinforcing bars D to be joined, but the two deformed reinforcing bars D are main holes in one surface and the other surface facing each other. A body 1 in which a partition partition wall W is formed between a main hole MH machined on one surface and a main hole MH machined on the other surface, and a body 1 formed by processing an MH (Main Hall). The cap 2 (Cap) screwed into the pair of machined main holes MH and the deformed reinforcing bar D are allowed to pass through the center of the cap 2, and the inner peripheral surface is tapered (Taper). The first deformed reinforcing bar passing hole 3 and the first deformed reinforcing bar passing hole 3 and the deformed reinforcing bar D provided inside the main hole MH and when the cap 2 is pulled into the main hole MH. It may be provided with a binding means 4 that is sandwiched between the gaps and binds the deformed reinforcing bar D and the cap 2.

Further, as shown in FIG. 2, the present invention is fitted between the caps 2 and 1, but when the cap 2 is completely screwed into the main hole MH, between the cap 2 and the body 1. The operator is made aware that the cap 2 and the main hole MH are completely screwed by being crimped and damaged, and before the deformed reinforcing bar D is fitted into the first deformed reinforcing bar passing hole 3. A stabilizing ring 5 is further provided that keeps the gap between the cap 2 and the body 1 constant and facilitates fitting of the deformed reinforcing bar D into the first deformed reinforcing bar passing hole 3.

As shown in FIGS. 2 and 3, the stabilizing ring 5 has a ring shape, and two or more notched grooves 51 are formed at equal intervals on the outer peripheral surface.

The notch groove 51 makes it easy for the stabilizing ring 5 to be damaged when the cap 2 is completely screwed into the main hole MH, and for the damaged stabilizing ring 5 to be easily removed from the cap 2.

As shown in FIG. 6, the cap 2 has a cylindrical shape and is inserted into the main hole MH, but the cap body 21 (Cap Body) screwed with the main hole MH and the deformed reinforcing bar D. Is formed at the tip of the cap body 21 facing each other, but is formed on the boundary line between the cap head portion 22 whose outer edge surface is processed into a hexagonal shape and the cap head portion 22 and the cap body 21. A stepped portion 23 that is hooked on the peripheral edge of the entrance of the main hole MH when the cap 2 and the main hole MH are completely screwed is provided.

As shown in FIG. 6, the first deformed reinforcing bar passing hole 3 is processed to a predetermined depth so that the deformed reinforcing bar D can pass through the center of the front surface of the cap 2 facing the deformed reinforcing bar D. The tip-side deformed reinforcing bar passing hole 31 and the first tip-side deformed reinforcing bar passing hole 31 are communicated with each other, but as the deformed reinforcing bar D advances from the tip of the cap 2 facing each other toward the end of the cap 2 facing the body 1. It is provided with a first terminal-side deformed reinforcing bar passing hole 32 whose inner diameter gradually increases.

As shown in FIGS. 3 to 4, the binding means 4 has a wedge shape, and two or more of the binding means 4 are inside the first deformed reinforcing bar passing hole 3 in the circumferential direction of the first deformed reinforcing bar passing hole 3. When the cap 2 is pulled into the main hole MH, it is sandwiched in the gap between the first deformed reinforcing bar passing hole 3 and the deformed reinforcing bar D, and the deformed reinforcing bar D is the first deformed shape. A wedge-shaped locking member 41 that prevents the reinforcing bar from being pulled out from the reinforcing bar passage hole 3 and a deformed reinforcing bar D provided inside the main hole MH, but the deformed reinforcing bar D is passed through the center of the front surface facing the cap 2, and the front surface is the wedge. An intermediate fitting member 42 having an annular flange 421 formed on the peripheral edge of the front surface facing the cap 2 and in contact with the peripheral edge of the end of the cap 2 and the main hole MH. Although it is provided inside, the elastic member 43 through which the deformed reinforcing bar D is passed by pressing the intermediate fitting member 42 toward the cap 2 by using its own elastic force while supporting the partition partition wall W, and the cap. When the 2 is fitted into the main hole MH, the stopper 44 that stops the wedge-shaped locking member 41 that is pushed by the inner peripheral surface of the first deformed reinforcing bar passing hole 3 and moves backward into the main hole MH. Be prepared.

As shown in FIGS. 4 and 7, the annular flange 421 formed on the intermediate fitting member 42 is attached to the cap 2 when the intermediate fitting member 42 is pushed toward the elastic member 43 by the cap 2. The elastic repulsive force of the elastic member 43 is evenly adjusted in contact with the end so that the deformed reinforcing bar D is smoothly fitted into the main hole MH.

As shown in FIG. 4, unevenness 411 is formed on the inner peripheral surface of the wedge-shaped locking member 41 in contact with the deformed reinforcing bar D in order to increase the frictional force.

As shown in FIGS. 7 and 8, two or more triangulation pieces 422 having a triangular cross section are attached to the front surface of the intermediate fitting member 42 facing the wedge-shaped locking member 41, and the triangulation is performed. The pieces 422 project from the front surface of the intermediate fitting member 42 toward the wedge-shaped locking member 41, and the two or more triangulation pieces 422 are equally spaced on the front surface of the intermediate fitting member 42. Arranged, one wedge-shaped locking member 41 is fitted between the pair of triangulation pieces 422.

In the triangulation piece 422, the first deformed reinforcing bar passing hole 3 is provided in a state where two or more wedge-shaped locking members 41 are kept at predetermined intervals inside the first deformed reinforcing bar passing hole 3 without being disturbed. It should be arranged in the circumferential direction of.

The triangulation piece 422 is processed into a triangular shape so as not to collide with the first deformed reinforcing bar passing hole 3 whose inner peripheral surface is tapered.

A third deformed reinforcing bar passage hole 423 is passed through the center of the front surface of the intermediate fitting member 42 facing the wedge-shaped locking member 41 so that the deformed reinforcing bar D can pass through, and the wedge-shaped locking member 41 As shown in FIG. 8, the front surface F1 of the intermediate fitting member 42 that is in contact with the intermediate fitting member 42 is tapered at a predetermined angle.

The tip of the stopper 44 is fitted into the third deformed reinforcing bar passing hole 423.

The elastic member 43 is composed of a coil-shaped spring whose tip is in contact with the back surface of the intermediate fitting member 42 and whose end is in contact with the partition partition wall W.

The coiled spring has a right hand so that the intermediate fitting member 42 is not damaged by the frictional resistance between the intermediate fitting member 42 and the coiled spring when the cap 2 is screwed into the main hole MH. Winded in the direction.

As shown in FIGS. 9 to 10, the stopper 44 is processed into a cylindrical shape so as to be fitted inside the coiled spring, and the deformed reinforcing bar D is located in the center of the front surface facing the wedge-shaped locking member 41. The second deformed reinforcing bar passage hole 441 is penetrated so that the stopper 44 can pass through, the tip of the stopper 44 is in contact with the end of the wedge-shaped locking member 41, and the end of the stopper 44 is the partition partition wall W. In contact with.

As shown in FIG. 11, the end of the wedge-shaped locking member 41 is inclined at an angle of 95 ° to 110 ° with respect to the horizontal plane, and the tip F2 of the stopper 44 is the end of the wedge-shaped locking member 41. It becomes a taper so as to be in contact with.

The reason why the end of the wedge-shaped locking member 41 is inclined and the tip of the stopper 44 is tapered is that the cap 2 is completely screwed into the main hole MH and passes through the first deformed reinforcing bar. When the hole 3 presses on the wedge-shaped locking member 41, a slip occurs on the contact surface between the wedge-shaped locking member 41 and the stopper 44, and the compressive load of the wedge-shaped locking member 41 is said. This is so that it can be completely transmitted to the outer peripheral surface of the deformed reinforcing bar D.

The process of fixing the end of the deformed reinforcing bar D to the deformed reinforcing bar connecting metal fitting C will be described as follows with reference to FIGS. 13a to 13c.

First, in order to connect the two deformed reinforcing bars D separated from each other, the end of one of the deformed reinforcing bars D is inserted into the first deformed reinforcing bar passing hole 3 provided in either one of the deformed reinforcing bar connecting metal fittings C. Plug it in.

Next, the deformed reinforcing bar D is pushed deep into the main hole MH until the end of the deformed reinforcing bar D comes into contact with the partition partition wall W in the body 1.

Next, when the cap 2 is completely screwed into the main hole MH, as shown in FIG. 13c, the stabilizing ring 5 is crimped and damaged while being pulled out from the deformed reinforcing bar connecting metal fitting C.

Further, the cap 2 moves backward inside the main hole MH, the intermediate fitting member 42 is pushed by the cap 2 and moves backward inside the main hole MH, and the elastic member 43 contracts. At this time, the elastic member 43 uses its own elastic force to constantly press the intermediate fitting member 42 toward the cap 2, so that the wedge-shaped locking member 41 has the first deformed reinforcing bar passage hole 3. The wedge-shaped locking member 41 is prevented from being pulled out and the alignment state of the wedge-shaped locking member 41 is not disturbed.

On the other hand, the wedge-shaped locking member 41 encounters the stopper 44 and is stopped while being pushed by the inner peripheral surface of the first deformed reinforcing bar passing hole 3 and moving backward, and the wedge-shaped locking member 41 is stopped. The locking member 41 is sandwiched in a gap between the first deformed reinforcing bar passing hole 3 and the deformed reinforcing bar D so that the deformed reinforcing bar D is not pulled out from the first deformed reinforcing bar passing hole 3. ..

Next, since the method of connecting the remaining other deformed reinforcing bar D to the deformed reinforcing bar connecting metal fitting C is the same as the above operation process, detailed description thereof will be omitted.

In the deformed reinforcing bar connecting metal fitting C according to the present invention having such a structure, the end of the deformed reinforcing bar D is fitted into the main hole MH through the first deformed reinforcing bar passing hole 3, and then the cap 2 is completely screwed. Once attached, the binding means 4 is interlocked with the cap 2 that moves backward inside the main hole MH, and is firmly sandwiched in the gap between the first deformed reinforcing bar passing hole 3 and the deformed reinforcing bar D. Prevent the deformed reinforcing bar D and the deformed reinforcing bar connecting metal fitting C from being separated.

Therefore, the operator fits the two deformed reinforcing bars D into the pair of main holes MH provided so as to face the deformed reinforcing bar connecting metal fitting C, and joins the two deformed reinforcing bars D separated from each other into one. can do.

The deformed reinforcing bar connecting metal fitting C that operates based on such a structure and operating principle simplifies the work when connecting the two deformed reinforcing bars D for the reinforcing bar arrangement work, and the two deformed reinforcing bars D are used. It is possible to increase the bending strength to the points to be joined.

INDUSTRIAL APPLICABILITY According to the present invention, when connecting two deformed reinforcing bars D for reinforcing bar arrangement work, the joining work time can be shortened and the construction period can be shortened.

Further, in the present invention, it is possible for the operator to visually confirm whether or not the deformed reinforcing bar connecting metal fitting C is completely bound to the end of the deformed reinforcing bar D.

D Deformed bar C Deformed bar connecting metal fittings MH Main hole W Partition partition wall 1 Body 2 Cap 21 Cap body 22 Cap head part 23 Stepped part 3 1st deformed reinforcing bar passing hole 31 1st tip side deformed reinforcing bar passing hole 32 1st End side deformed rebar passage hole 4 Bundling means 41 Wedge-shaped locking member 411 Concavo-convex 42 Intermediate fitting member 421 Circular collar 422 Triangulation split piece 423 Third deformed rebar passage hole 43 Elastic member 44 Stopper 441 Second deformed rebar passage Hole 5 Stabilizing ring

Claims (7)

In the deformed reinforcing bar connecting metal fitting (C) that binds the two deformed reinforcing bars (D) separated from each other during the reinforcing bar arrangement work using the deformed reinforcing bar (D).
The deformed reinforcing bar connecting metal fitting (C) is provided between the two deformed reinforcing bars (D) to be joined, but the two deformed reinforcing bars (D) are mainly placed on one surface and the other surface facing each other. A hole (MH) (Main Hall) is machined, and a partition partition wall (W) is formed between the main hole (MH) machined on one surface and the main hole (MH) machined on the other side. Body (1) and
Caps (2) (Caps) screwed into the pair of main holes (MH) machined in the fuselage (1), respectively.
A first deformed reinforcing bar passage hole (3) in which the deformed reinforcing bar (D) is allowed to pass through the center of the cap (2) and the inner peripheral surface is tapered (Taper).
The first deformed reinforcing bar passage hole (3) and the deformed reinforcing bar (D) are provided inside the main hole (MH) and when the cap (2) is pulled into the main hole (MH). The binding means (4) that is sandwiched between the gaps and binds the deformed reinforcing bar (D) and the cap (2),
Equipped with
It is fitted between the cap (2) and the fuselage (1), but when the cap (2) is completely screwed into the main hole (MH), it is between the cap (2) and the fuselage (1). The operator was made aware that the cap (2) and the main hole (MH) were completely screwed by being crimped and damaged in.
Before the deformed reinforcing bar (D) is fitted into the first deformed reinforcing bar passage hole (3), the gap between the cap (2) and the body (1) is kept constant to maintain the first deformed reinforcing bar. A deformed reinforcing bar connecting metal fitting (C), characterized in that a stabilizing ring (5) is further provided in the passage hole (3) to facilitate fitting of the deformed reinforcing bar (D). The binding means (4) has a wedge shape, and two or more are arranged inside the first deformed reinforcing bar passing hole (3) in the circumferential direction of the first deformed reinforcing bar passing hole (3). When the cap (2) is pulled into the main hole (MH), it is sandwiched in the gap between the first deformed reinforcing bar passing hole (3) and the deformed reinforcing bar (D), and the deformed reinforcing bar (D). A wedge-shaped locking member (41) that prevents the first deformed reinforcing bar from being pulled out from the first deformed reinforcing bar passage hole (3).
Although it is provided inside the main hole (MH), the deformed reinforcing bar (D) is passed through the center of the front surface facing the cap (2) , and the front surface is in contact with the end of the wedge-shaped locking member (41). An intermediate fitting member (42) in which an annular flange (421) formed on the front peripheral edge facing the cap (2) is in contact with the peripheral edge of the end of the cap (2).
Although it is provided inside the main hole (MH), the intermediate fitting member (42) is pressed toward the cap (2) by using its own elastic force while supporting the partition partition wall (W), and the deformed shape is provided. An elastic member (43) through which the reinforcing bar (D) passes, and
When the cap (2) is inserted into the main hole (MH), the wedge-shaped shape is pushed by the inner peripheral surface of the first deformed reinforcing bar passage hole (3) and moves backward into the main hole (MH). The deformed reinforcing bar connecting metal fitting (C) according to claim 1, further comprising a stopper (44) for stopping the locking member (41). The deformed reinforcing bar connecting according to claim 2, wherein unevenness (411) is formed on the inner peripheral surface of the wedge-shaped locking member (41) that is in contact with the deformed reinforcing bar (D) in order to increase the frictional force. Metal fittings (C). Two or more triangulation pieces (422) having a triangular cross section are attached to the front surface of the intermediate fitting member (42) facing the wedge - shaped locking member (41).
The triangulation piece (422) is projected from the front surface of the intermediate fitting member (42) toward the wedge-shaped locking member (41).
Two or more of the triangulation pieces (422) are arranged at equal intervals on the front surface of the intermediate fitting member (42).
The deformed reinforcing bar connecting metal fitting (C) according to claim 2, wherein one wedge-shaped locking member (41) is fitted between the pair of the triangular divided pieces (422). The second aspect of claim 2, wherein the elastic member (43) is composed of a coiled spring whose tip is in contact with the back surface of the intermediate fitting member (42) and whose end is in contact with the partition partition wall (W). Deformed reinforcing bar connecting metal fittings (C). The stopper (44) is processed into a cylindrical shape so as to be fitted inside the coiled spring.
A second deformed reinforcing bar passage hole (441) is penetrated through the center of the front surface facing the wedge-shaped locking member (41) so that the deformed reinforcing bar (D) can pass through.
The fifth aspect of claim 5, wherein the tip of the stopper (44) is in contact with the end of the wedge-shaped locking member (41), and the end of the stopper (44) is in contact with the partition partition wall (W). Deformed reinforcing bar connecting metal fittings (C). A third deformed reinforcing bar passage hole (423) is penetrated through the center of the front surface of the intermediate fitting member (42) facing the wedge-shaped locking member (41) so that the deformed reinforcing bar (D) can pass through.
The front surface (F1) of the intermediate fitting member (42) in contact with the wedge-shaped locking member (41) is tapered at a predetermined angle (Taper).
The deformed reinforcing bar connecting metal fitting (C) according to claim 2, wherein the tip of the stopper (44) is fitted into the third deformed reinforcing bar passing hole (423).

Images