JPH09279766A - Joint structure of deformed reinforcement - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily join deformed reinforcements end-to-end through on-site construction work. SOLUTION: When an external thread 9 on a lock bolt 3 is engaged with an internal thread 5 on a joint main body 2 and tightened, a taper part 14 at each end of the outer periphery of a sleeve 4 is exerted with the force of pressure contact produced by the taper part 6 of the joint main body 2 and the taper part 12 of the lock bolt 3, and the sleeve 4 is deformed and reduced in diameter to strongly hold the surfaces of the ends of deformed reinforcements 1 together to join the deformed reinforcements 1 end-to-end. The inner periphery of the sleeve 4 is made uneven, and this uneven part is engaged with the uneven part 1a of the surface of each deformed reinforcement 1, so that disconnection of the end of the deformed reinforcement 1 from the joint main body 2 and the lock bolt 3 can surely be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint structure for joining ends of deformed bars.

[0002]

2. Description of the Related Art Generally, the ends of small diameter deformed bars are
The ends of the deformed reinforcing bars are overlapped with each other, and the overlapping portions are bound together by welding or welded, whereby they are integrally joined. There is also a method in which a threaded member is butt-joined to the end of the deformed rebar in a factory in advance by friction welding, and the end of the deformed rebar on the mating side is screwed.

[0003]

However, since the above-mentioned joining method using the numbered wire requires a considerable amount of skill, it can be quickly performed by a specialized worker called a rebar worker, but an unskilled person tends to lack the joining force and is stable. It lacks sex. In the lap joint method by welding, unless the overlapping length of the ends of the deformed bars is long, sufficient bonding strength cannot be obtained, and when a large number of reinforcing bars are crowded, welding work is difficult,
There is a problem in safety and safety such as a fire caused by sparks and burns to workers. The method of joining the screw member to the end of the deformed bar by friction welding requires not only large cost but also high cost, but also causes the joint failure due to dents on the screw member during storage and transportation. Becomes The purpose of the present invention is to eliminate such problems,
An object of the present invention is to provide a joint structure for deformed rebars, which enables mechanically and securely mechanically connecting the ends of the deformed rebars on site.

[0004]

The invention according to claim 1 of the present invention is a joint structure for joining ends of deformed rebars in a butt shape, and is formed in a tubular shape, and an internal thread is provided on the inner periphery of one end, The inner end of the female screw has a joint body provided with a taper portion expanding toward the female screw side, and the other end of the hollow shaft portion having one end of the outer periphery provided with a male screw screwed into the female screw of the joint body. A large diameter head portion is provided on the outer periphery of the lock bolt, and a lock bolt having a tapered portion symmetrical to the tapered portion of the joint body is provided on the inner peripheral portion, and the tapered portions of the joint body and the lock bolt are provided on the outer periphery of both ends. And a taper portion that is fitted inside, and a shrinkable and deformable sleeve provided with an uneven portion that engages with the uneven portion on the surface of the deformed bar on the inner circumference. Thus, the joint body is inserted into the end of one deformed bar and the lock bolt is inserted into the end of the other deformed bar, and the end protruding from the joint body of one deformed bar and the lock bolt protruding from the other deformed bar Both ends of the sleeve are inserted into the end of the sleeve, the male screw of the lock bolt is screwed into the female screw of the joint body, and the tightening force causes the sleeve to contract and deform to hug the end of the deformed bar in a retaining shape. It is characterized by that. Specific means for constructing the sleeve so as to be capable of reducing its diameter include forming slits at both ends of the sleeve in the axial direction, forming the sleeve in a C-shaped cross section, or forming the sleeve in two. . A window for confirming the butting is provided in the central portion of the sleeve in the axial direction.

The invention according to claim 4 of the present invention is a joint structure for joining ends of deformed reinforcing bars in a butt shape, and is formed in a tubular shape, and both ends are provided with taper female threads outwardly expanding. And a hollow shaft portion having a notch for reducing the diameter and provided with a tapered male screw threaded to the tapered female screw of the joint body at one end of the outer circumference, It has a pair of left and right lock bolts consisting of a large-diameter head provided at the other end, and an outer diameter that fits inside the hollow shaft portion of the lock bolt, and engages with the uneven portion on the surface of the deformed rebar on the inner circumference. A pair of left and right sleeves which can be deformed by reducing the diameter are provided with matching concave and convex portions. Thus,
The sleeves are inserted through the ends of both deformed bars, the hollow shaft portions of the lock bolts are externally fitted to the sleeves, and the tapered male threads of the lock bolts are screwed into the tapered female threads at both ends of the joint body. ,
With this tightening force, the hollow shaft portion and the sleeve are deformed to reduce the diameter, and the ends of the deformed reinforcing bars are held in a manner that prevents them from coming off. A grout material injection hole is provided in the central portion of the joint body in the axial direction. As a specific means for making the sleeve deformable by reducing its diameter, it is formed in a C-shaped cross section, or
Alternatively, it may be formed in two.

According to a fifth aspect of the present invention, in a joint structure for joining ends of deformed bars in a butt-like shape, the joint structure is formed in a tubular shape, and both ends have cutouts for reducing the diameter, And a pair of left and right lock nuts having a taper-shaped tapered male thread, a pair of left and right lock nuts having outwardly expanding taper female threads to be engaged with the tapered male thread of the joint body, and inner circumferences of both ends of the coupling body. A pair of left and right sleeves that can be reduced in diameter are provided, which have outer diameters to be fitted and which are provided on the inner circumference with uneven portions that engage with the uneven portions on the surface of the deformed rebar. Thus, the sleeves are inserted into the ends of both deformed bars, the respective ends of the joint body are fitted into the respective sleeves, and the taper female threads of the lock nuts are screwed into the taper male threads of the both ends of the joint body. With this tightening force, both ends of the joint body and the sleeve are deformed by diameter reduction, and the ends of the deformed rebar are held in a retaining shape. Also in this case, a grout material injection hole is provided in the central portion of the joint body in the axial direction. As a specific means for enabling the sleeve to be deformed by reducing its diameter, it may be formed in a C-shaped cross section or formed in two.

[0007]

According to the first aspect of the present invention, when the male screw of the lock bolt is screwed into the female screw of the joint body and tightened, the tapered portions of both ends of the sleeve are pressed by the tapered portion of the joint body and the tapered portion of the lock bolt. Since the force is applied, the sleeve is contracted and deformed, and the surfaces of the end portions of both the deformed reinforcing bars are strongly hugged at the same time, and the ends of the deformed reinforcing bars are joined together in a butt shape. By strongly hugging the surface of the end of the deformed rebar with the sleeve, the irregularities on the inner circumference of the sleeve engage with the irregularities on the surface of the deformed rebar, so even if the end of the deformed rebar is pulled strongly, the joint body and It will not come out of the lock bolt.

According to the invention of claim 4, when the taper male threads of the lock bolt are screwed into the taper female threads at both ends of the joint body and tightened, the lock bolt is deformed by the wedge action to reduce the outer diameter of the sleeve. The sleeve is tightly hugged and subjected to compressive deformation, and the sleeve is radially deformed to tightly hug the surfaces of the ends of the deformed reinforcing bars, and the ends of the deformed reinforcing bars are joined together in a butt shape. In this case as well, the sleeve strongly hugs the surface of the end of the deformed reinforcing bar, and the uneven portion on the inner circumference of the sleeve engages with the uneven portion of the surface of the deformed reinforcing bar, so that the end of the deformed reinforcing bar comes out of the lock bolt. Can be reliably prevented.

According to the fifth aspect of the invention, when the taper male threads on both ends of the joint body are respectively screwed and tightened with the taper female threads of the lock nut, the both end portions of the joint body are contracted and deformed by the wedge action to form the sleeve. The outer periphery of the deformed rebar is compressed and deformed, and the sleeve is deformed to reduce the diameter of the deformed rebar so that the ends of the deformed rebar are joined together in a butt shape. In this case as well, the sleeve hugs the surface of the end of the deformed rebar, and the uneven portion on the inner circumference of the sleeve engages with the uneven portion of the surface of the deformed rebar, preventing the end of the deformed rebar from coming out of the lock nut. It can be surely prevented.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION

(First Embodiment) A first embodiment of the joint structure for deformed reinforcing bars according to the present invention will be described with reference to FIGS. 1 to 3. In FIG. 1, 1 and 1 are deformed reinforcing bars whose ends are joined together in a butt shape, 2 is a joint body, 3 is a lock bolt, and 4 is a sleeve.

The joint body 2 is formed in a tubular shape made of steel or cast iron, and is provided with an internal thread 5 at one end thereof.
A taper portion 6 is provided at the inner rear end of the so as to widen toward the female screw 5, and a projection 7 having a semicircular cross section is provided in the taper portion 6 in a spiral shape. The outer peripheral portion of the joint main body 2 at the center in the axial direction is formed in a polygonal shape in order to hang a tightening tool such as a spanner in a non-rotating manner. It is preferable that the female screw 5 is a square screw as in the illustrated example so that the lead is enlarged so that the lead can be tightened with a light force. The lock bolt 3 is made of steel, cast iron, or the like, and has a hollow shaft portion 10 provided with an external thread 9 for engaging with the internal thread 5 of the joint body 2 at one outer peripheral end,
The hollow shaft portion 10 has a polygonal large-diameter head portion 11 provided at the other end of the outer periphery thereof, and a tapered portion 12 is provided at the inner portion of the inner periphery so as to gradually become thinner toward the inner portion. The taper part 1
A ridge 13 having a semicircular cross-section is provided in 2 in a spiral shape. The sleeve 4 is made of steel, copper, or the like, and is provided with tapered portions 14 on the outer circumferences at both ends, which are fitted into the tapered portion 6 of the joint body 2 and the tapered portion 12 of the lock bolt 3, respectively. A rib 15 is provided in the axial direction on the inner surface of the deformed rebar 1 and an uneven portion which engages with the uneven portion 1a formed by a screw-shaped, lattice-shaped, mesh-shaped or other projection on the surface of the deformed reinforcing bar 1 or other protrusions is formed. 16 are provided. Further, the sleeve 4 has slits 17 formed at both ends in the axial direction so that the sleeve 4 is easily deformed by reducing its diameter. Instead of the slit 17, the sleeve 4 may be formed in a C-shaped cross section, or the sleeve 4 may be formed in two. A window 18 is provided at the center of the sleeve 4 in the axial direction for checking the butting.

Next, these joint body 2 and lock bolt 3
A method of joining the ends of the deformed reinforcing bars 1 by using the sleeve 4 and the sleeve 4 will be described. First, the joint body 2 is inserted into one end of the deformed rebar 1 so that the female screw 5 faces the end side of the deformed rebar 1, and the lock bolt 3 is attached to the end of the other deformed rebar 1 and the male screw 9 is attached to the end of the deformed rebar 1. Insert so that it faces to the side. Next, the end of the deformed rebar 1 protruding from the joint body 2 and the end of the deformed rebar 1 protruding from the lock bolt 3 are inserted into both ends of the sleeve 4. At that time, it is confirmed by looking through the window 18 that the ends of both of the deformed rebars 1 closely oppose each other in the center of the sleeve 4. Next, the joint body 2 and the lock bolt 3 are moved so as to approach the sleeve 4 on each deformed rebar 1, and the male screw 9 of the lock bolt 3 is screwed into the female screw 5 of the joint body 2 and tightened. Then, the tapered portions 14 on both ends of the outer circumference of the sleeve 4 are provided.
Receives a pressure contact force by the taper portion 6 of the joint body 2 and the taper portion 12 of the lock bolt 3, and the sleeve 4 is contracted and deformed, so that the surfaces of the end portions of both of the deformed reinforcing bars 1 are strongly hugged. At that time, between the contact surface between the tapered portion 14 at one end of the sleeve 4 and the tapered portion 6 of the joint body 2, and between the contact surface between the tapered portion 14 at the other end of the sleeve 4 and the tapered portion 12 of the lock bolt 3, Since the frictional resistance can be reduced by the axial ribs 15 and the spiral ridges 7 and 13 provided on each of them, the sleeve 4 can be reliably contracted and deformed with a lighter tightening force. Since the sleeve 4 strongly hugs the surfaces of the end portions of both deformed reinforcing bars 1 at the same time, the uneven portion 16 on the inner circumference of the sleeve 4 engages with the uneven portion 1a on the surface of the deformed reinforcing bar 1. Even if the portion is strongly pulled, it will not come out of the joint body 2 and the lock bolt 3.

(Second Embodiment) A second embodiment of the joint structure for deformed reinforcing bars according to the present invention will be described with reference to FIGS. 4 and 5. This embodiment is largely different from the first embodiment in that a pair of left and right lock bolts 3 and a pair of sleeves 4 are used, and one joint body 2 is commonly used.

The joint body 2 is formed in a tubular shape made of steel or cast iron, and is provided with taper female threads 20 on both inner circumferences at both ends thereof in an outwardly expanding tapered shape. A grout material injection hole 21 is provided in the central portion of the joint body 2 in the axial direction. Lock bolt 3
A hollow shaft portion 10 made of steel or cast iron, provided with a tapered male screw thread 22 that is screwed into the tapered female thread 20 of the joint body 2 at one end of the outer circumference, and having a notch 23 for reducing the diameter. It comprises a large-diameter head portion 11 provided at the other end of the outer periphery of the hollow shaft portion 10. The sleeve 4 is made of a steel material or a copper material, has an outer diameter that fits inside the hollow shaft portion 10 of the lock bolt 3, and has an uneven portion that engages with the uneven portion 1 a on the surface of the deformed rebar 1 on the inner circumference. 16 are provided. Further, the sleeve 4 is formed in a C-shaped cross section so that the sleeve 4 is easily deformed by reducing its diameter.
Instead of the C-shaped cross section, it may be formed in two.

Next, these joint body 2 and lock bolt 3
A method of joining the ends of the deformed reinforcing bars 1 by using the sleeve 4 and the sleeve 4 will be described. First, the lock bolts 3 are inserted into the ends of both of the deformed bars 1. Next, the sleeves 4 are inserted into the ends of both the deformed bars 1 protruding from the lock bolts 3. Next, the hollow shaft portion 10 of the lock bolt 3 is externally fitted to each sleeve 4, and the tapered male threads 22 of the lock bolt 3 are screwed into the tapered female threads 20 at both ends of the joint body 2 to be tightened. Then, the lock bolt 3 is deformed by the wedge action to hug the outer circumference of the sleeve 4 and compressively deforms, and the sleeve 4 is shrunk to hug the end face of the deformed rebar 1 to deform the deformed rebar 1. The ends of can be spliced together. Also in this case, since the sleeve 4 strongly hugs the surface of the end portion of the deformed rebar 1, the uneven portion 16 on the inner periphery of the sleeve 4 engages with the uneven portion 1a on the surface of the deformed rebar 1. It is possible to reliably prevent the end portion from coming off from the joint body 2 and the lock bolt 3. At that time, whether or not the ends of the deformed bars 1 are located in the central portion of the joint body 2 can be confirmed by looking through the grout material injection hole 21 in the center of the joint body 2. Finally, when the grout material 24 is injected into the grout material injection hole 21, the grout material 24 enters between the inner periphery of the central portion of the joint body 2 and the end portion of the deformed bar 1. By solidifying the grout material 24, the ends of the deformed reinforcing bars 1 can be bonded more firmly. If the taper female threads 20 at both ends of the joint body 2 are provided in the left-right opposite directions, both lock bolts 3 can be tightened at the same time by turning the joint body 2 in one direction.

(Third Embodiment) A third embodiment of the joint structure for deformed reinforcing bars according to the present invention will be described with reference to FIGS. 6 and 7. This embodiment has a structure in which the combination of the male screw and the female screw is reversed from that of the second embodiment. 6 and 7
1, reference numerals 1 and 1 are deformed reinforcing bars whose ends are joined together, 2 is a joint body, 25 and 25 are a pair of left and right lock nuts, and 4 and 4 are a pair of left and right sleeves.

The joint body 2 is formed in a tubular shape made of steel or cast iron, and has notches 26 on both outer circumferences for reducing the diameter.
And a tapered male screw 27 having a tapered shape is provided.
Further, the grout material injection hole 2 is provided at the center of the joint body 2 in the axial direction.
8 is provided. The lock nut 25 is made of steel, cast iron, or the like, and has a taper female screw 29 that is outwardly expanded and is screwed into the taper male screw 27 of the joint body 1. Sleeve 4
A concavo-convex portion 16 which is made of steel or copper material and has an outer diameter that fits on the inner peripheries of both ends of the joint body 2 and which engages with the concavo-convex portion 1a on the surface of the deformed bar 1 is provided on the inner perimeter. Further, the sleeve 4 is formed in a C-shaped cross section so that the sleeve 4 can be easily reduced in diameter and deformed.
Instead of the C-shaped cross section, it may be formed in two.

A method of joining the ends of the deformed bars 1 using the joint body 2, the lock nut 25 and the sleeve 4 will be described. First, the lock nuts 25 are inserted into the ends of both of the deformed bars 1. Next, the sleeves 4 are inserted into the ends of both the deformed bars 1 protruding from the lock nuts 25. Next, both ends of the joint body 2 are fitted into the respective sleeves 4, and the taper female threads 29 of the lock nut 25 are screwed into the taper male threads 27 at both ends of the joint body 2 and tightened. Then, both ends of the joint body 2 are deformed by a wedge action to reduce the diameter, and the outer circumferences of the sleeves 4 on both sides are tightly clamped to apply a compressive deformation, and the respective sleeves 4 are reduced to deform the surface of the end portion of the deformed rebar 1. Hugging tightly,
The ends of the deformed bars 1 can be joined together in a butt shape. Also in this case, since the sleeve 4 strongly hugs the surface of the end portion of the deformed rebar 1, the uneven portion 16 on the inner circumference of the sleeve 4 engages with the uneven portion 1a of the surface of the deformed rebar 1. It is possible to reliably prevent the portion from coming off from the joint body 2 and the lock nut 25. Finally, when the grout material 24 is injected into the grout material injection hole 28, the grout material 24 enters between the inner periphery of the central portion of the joint body 2 and the end portion of the deformed bar 1. By solidifying the grout material 24, the ends of the deformed reinforcing bars 1 can be bonded more firmly. If the tapered male screws 27 at both ends of the joint body 2 are provided in the left and right directions opposite to each other, both lock nuts 25 can be simultaneously tightened by turning the joint body 2 in one direction.

According to each of the above-mentioned embodiments, the joining work using the joint body 2, the lock bolt 3 or the lock nut 25 and the sleeve 4 does not require skill such as the conventional connecting method using a number wire, Even unskilled people can easily join with excellent bonding strength and stability.
Also, unlike the lap joint method by welding, there is no need to lengthen the overlapping lengths of the reinforcing bars, but sufficient strength can be obtained simply by butt-joining each other, and many reinforcing bars are crowded. Also in this case, the work can be performed easily and safely, and the ends of the reinforcing bar 1 can be easily and firmly mechanically connected to each other on site.

[0020]

According to the first aspect of the present invention, the number of members of the joint body, the lock bolt and the sleeve is small, and the ends of the deformed rebars are joined together by a simple operation of tightening the joint body 2 and the lock bolt 3. Can be easily and safely mechanically joined together on site. According to the invention of claim 2, there is an effect that the diameter of the sleeve can be surely reduced and deformed, and the end portion of the deformed reinforcing bar can be strongly hugged. According to the invention of claim 3, it is convenient to easily confirm whether or not the ends of the deformed reinforcing bars face each other in the close proximity inside the central portion in the axial direction of the sleeve.

According to the inventions of claims 4 and 5, a joint body, a pair of lock bolts or lock nuts,
Also, with the pair of sleeves, the ends of the deformed reinforcing bars can be easily and mechanically staked together in a butt-like manner on site. According to the invention of claim 6, further,
With the grout material, it is possible to more firmly bond the ends of the deformed reinforcing bars. According to the invention according to claim 7 and claim 8, there is an effect that the end portion of the deformed reinforcing bar can be strongly hugged by the sleeve.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a deformed bar joint structure according to a first embodiment.

FIG. 2 is a separated state diagram of the joint structure of the deformed bar shown in FIG.

FIG. 3 is an enlarged sectional view taken along line AA in FIG.

FIG. 4 is a cross-sectional view of a deformed bar joint structure of a second embodiment.

5 is a separated state view of the joint structure of the deformed reinforcing bar shown in FIG. 4. FIG.

FIG. 6 is a cross-sectional view of a deformed bar joint structure according to a third embodiment.

FIG. 7 is a separated state view of the joint structure of the deformed reinforcing bar shown in FIG.

[Explanation of symbols]

 1 Reinforcing Bar 2 Joint Main Body 3 Lock Bolt 4 Sleeve 5 Female Thread 6 Tapered Part 9 Male Thread 10 Hollow Shaft Part 11 Large Diameter Head 12,14 Tapered Part 16 Concavo-convex Part 17 Slit 18 Window 20, 29 Tapered Female Thread 21, 28 Grout Material Injection Hole 22, 27 Tapered male screw 23, 26 Notch 24 Grout material 25 Lock nut

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masami Nakajima 1 at 153 Tajimecho, Kishiwada-shi, Osaka Japan Steel Pipe Fitting Co., Ltd. Japan Steel Pipe Fittings Co., Ltd.

Claims (8)

[Claims] 1. A joint structure for joining ends of deformed reinforcing bars in a butt shape, wherein the ends are formed in a tubular shape, and an internal thread is provided at an inner periphery of one end, and the internal thread of the internal thread is expanded toward the internal thread side. The inner diameter of the inner circumference of the joint body is provided with a tapered portion, and the outer circumference of the other end of the hollow shaft portion is provided with an external thread at one end of the outer circumference. A lock bolt having a tapered portion that is symmetrical to the tapered portion of the joint body, and tapered portions that are internally fitted to the tapered portions of the joint body and the lock bolt, respectively, are provided on both outer circumferences, and A deformable sleeve provided with an uneven portion that engages with the uneven portion of the surface of the deformed bar, wherein the joint body is at one end of the deformed bar and the lock is at the end of the other deformed bar. Each bolt is inserted, Both ends of the sleeve are inserted into the end of one deformed rebar protruding from the joint body and the end of the other deformed rebar protruding from the lock bolt, and the male screw of the lock bolt is screwed into the female screw of the joint body and tightened. A joint structure for deformed reinforcing bars, characterized in that the sleeve is deformed by the force to deform and hugs the ends of the deformed reinforcing bars in a retaining manner. 2. The deformed reinforcing bar joint structure according to claim 1, wherein slits are formed in both ends of the sleeve in the axial direction. 3. The deformed rebar joint structure according to claim 1, wherein a sleeve for confirming a butt is provided at a central portion in the axial direction of the sleeve. 4. A joint structure for joining ends of deformed rebars in a butt joint shape, wherein the joint body is formed in a tubular shape, and the inner periphery of both ends is provided with outwardly expanding taper female threads, and one end of the outer periphery. Is provided with a taper taper male screw threaded to the taper female thread of the joint body, and has a hollow shaft portion having a notch for diameter reduction deformation, and a large diameter head provided at the other end of the outer periphery of the hollow shaft portion. Consisting of a pair of left and right lock bolts, and having an outer diameter that fits inside the hollow shaft portion of the lock bolt, and an uneven portion that engages with the uneven portion of the surface of the deformed rebar is provided on the inner circumference. A pair of left and right shrinkable sleeves are provided, and the sleeves are inserted into the ends of both deformed bars, and the hollow shaft portions of the lock bolts are externally fitted to the sleeves. The taper female screw in it Which is screwed into the tapered male thread of the locking bolt,
A deformed rebar joint structure characterized in that the hollow shaft portion and the sleeve are deformed by the tightening force to hug the ends of the deformed rebar so that the ends of the deformed rebar do not come off. 5. A joint structure for joining ends of deformed reinforcing bars in a butt joint shape, which is formed in a tubular shape, and has tapered outer threads on both outer circumferences, both of which have notches for reducing the diameter and which are tapered. A joint body, a pair of left and right lock nuts having outwardly expanding taper female threads that are screwed into the tapered male threads of the joint body, and an outer diameter that fits on the inner circumference of both ends of the joint body, The inner periphery is provided with a pair of left and right sleeves that can be reduced in diameter and deformed, provided with an uneven portion that engages with the uneven portion on the surface of the deformed bar, and the sleeves are inserted at the ends of both deformed bars. , Both ends of the joint body are fitted in the respective sleeves, and the taper female threads of the lock nut are respectively screwed into the taper male threads of the both ends of the joint body, and the both ends of the joint body and the sleeve are tightened by this tightening force. Joint structure of deformed bar, characterized in that it was the radial deformation embrace the stop-like exit end of the deformed bar. 6. The joint structure for deformed reinforcing bars according to claim 4 or 5, wherein a grout material injection hole is provided at a central portion in the axial direction of the joint body. 7. The joint structure for deformed reinforcing bars according to claim 1, 4, or 5, wherein the sleeve is formed in a C-shaped cross section. 8. The joint structure for deformed reinforcing bars according to claim 1, 4 or 5, wherein the sleeve is formed in two.