JP2004225261A - Reinforcement end anchoring device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reinforcement end anchoring device capable of improving the reliability of reinforcement arrangement by the increase of anchoring force by providing the end of a reinforcement with a diameter enlarged part integrated with the reinforcement, and mounting an anchor plate to the end part of the reinforcement using the diameter enlarged part to increase the mounting strength of the anchor plate to the reinforcement. <P>SOLUTION: The end of the reinforcement 1 is provided with the diameter enlarged part 2 larger in diameter than the reinforcement 1 and integrated with the reinforcement 1. An external thread 3 is formed at the outer peripheral surface of the diameter enlarged part 2, and the anchor plate 5 with the inner peripheral surface formed with an internal thread 4 conformed to the external thread 3 is externally fitted and screwed with the diameter enlarged part 2. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an end fixing device for enlarging the end of a reinforcing bar embedded in concrete with a fixing plate to increase the fixing force with respect to the axial pull-out force of the reinforcing bar with respect to concrete.
[0002]
[Prior art]
In the construction of reinforced concrete structures, rebars, and steel-framed concrete structures, various types of rebar such as rebar for columns and rebar for beams are buried, but these rebars are sized, numbered, and arranged according to the strength of the buried area. The interval etc. are set.
[0003]
As mentioned above, it is extremely important to increase the integrity of the joints between columns and beams in reinforcing bars buried in concrete, from the viewpoint of securing concrete strength. End fixing means for maintaining the strength of the concrete by increasing the diameter of the end of the reinforcing bar embedded in the concrete with a fixing plate in advance and increasing the fixing force of the reinforcing bar to the concrete in the axial direction is adopted.
[0004]
As a conventional end fixing means, a fixing method in which the end of the reinforcing bar is bent in a hook shape, or as proposed in Japanese Patent Application Laid-Open No. 2001-159214, a screw shaft is extended to the end of the reinforcing bar by friction welding. An end fixing device is known in which, when a fixing plate is connected to a screw shaft and a fixing plate using a nut is screwed and fixed, and a reinforcing bar is embedded in concrete, the fixing plate increases the axial fixing force of the reinforcing bar. .
[0005]
[Problems to be solved by the invention]
By the way, the fixing method in which the end of the reinforcing bar is bent into a hook shape as described above has a problem that the bending process is difficult or the fixing length becomes long due to the increase in strength and the diameter of the reinforcing bar. .
In addition, the above-described end fixing device employs friction welding for connection between the reinforcing bar and the screw shaft. However, it is necessary to introduce expensive equipment for friction welding, and processing cannot be performed on site, There is a problem that it takes time to correct the arrangement error.
[0006]
Accordingly, an object of the present invention is to provide an enlarged diameter portion integrated with the reinforcing bar at an end portion of the reinforcing bar in order to solve the above-described problem, and use the enlarged diameter portion to fix the fixing plate to the end portion of the reinforcing bar. By fixing the fixing plate using the screws of the threaded bar, it is possible to easily correct the rebar arrangement, streamlining the rebar arrangement, and It is an object of the present invention to provide a rebar end fixing device which can improve the reliability of reinforcement arrangement by increasing the fixing strength of a fixing plate, and can also perform on-site processing by using simple processing equipment.
[0007]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the invention according to claim 1 provides an enlarged diameter portion having a diameter larger than that of a reinforcing bar at an end portion of a reinforcing bar, and forms an external thread on an outer peripheral surface of the enlarged diameter portion to form an inner peripheral surface. And a fixing plate formed with a female screw compatible with the male screw is externally screwed into the enlarged diameter portion.
[0008]
According to a second aspect of the present invention, there is provided an outer fitting in which an enlarged diameter portion having a diameter larger than that of a reinforcing bar is provided at an end portion of the reinforcing bar, and the enlarged diameter portion is accommodated in a fixing plate inserted into the reinforcing bar so as to prevent the enlarged diameter portion from falling off. A hole is provided, and a fastening member is screwed to the opening end side of the outer fitting hole.
[0009]
The invention according to claim 3 is that an enlarged diameter portion having a diameter larger than that of the reinforcing bar is provided at an end of the reinforcing bar, and a fastening member inserted into the reinforcing bar so as to prevent the enlarged diameter portion from coming off is provided. This adopts a configuration in which the fitted fixing plate is screwed.
[0010]
According to a fourth aspect of the present invention, an enlarged portion having a diameter larger than that of the reinforcing bar is provided at an end of the reinforcing bar, and a fixing plate that prevents the reinforcing bar from falling off at the enlarged portion is provided. The fixing member is fixed to a reinforcing bar in a state where the fastening member positioned on the side is inserted and the fixing plate is sandwiched between the enlarged diameter portion and the fastening member.
[0011]
According to a fifth aspect of the present invention, an enlarged diameter portion having a larger diameter than the reinforcing bar is provided at an end of the reinforcing bar, and an insertion hole having an inner diameter passing through the enlarged diameter portion on the fixing plate, and a screw hole having a larger diameter than the insertion hole are provided. Is provided in a penetrating shape, and a split retaining member having an inner diameter fitted into the reinforcing bar and an outer diameter that is accommodated in the screw hole and has a larger diameter than the enlarged diameter portion. And a fastening member is screwed into a screw hole of the fixing plate in a state of being externally fitted to the enlarged diameter portion.
[0012]
According to a sixth aspect of the present invention, an enlarged diameter portion having a diameter larger than that of the reinforcing bar is provided at an end portion of the reinforcing bar, and an outer fitting hole to the enlarged diameter portion is formed on the fixing plate; And a split retaining member having an inner diameter fitted into the reinforcing bar and an outer diameter that is accommodated in the screw hole and has a larger diameter than the enlarged diameter portion, and holds the fastening member inserted into the reinforcing bar in a retaining shape. Further, a configuration is employed in which a fastening member is screwed into the screw hole of the fixing plate externally fitted to the enlarged diameter portion.
[0013]
The invention according to claim 7 employs a configuration in which a threaded rebar is used as a rebar, a cylinder is externally screwed to the threaded rebar, and a fixing plate is externally threaded to the cylinder.
[0014]
The invention according to claim 8 uses a threaded rebar as a reinforcing bar, a fixing plate is externally fitted to the threaded rebar, and is fixed by a fastening member which is externally screwed to the threaded rebar so as to be located on both sides of the fixing plate. This adopts a configuration in which the plate is fixed.
[0015]
Here, as the reinforcing bar when the enlarged diameter portion is provided, not only a round shaft reinforcing bar but also a deformed reinforcing bar or a threaded reinforcing bar can be used. Also, since the enlarged diameter portion is integrally formed from the material of the reinforcing bar, there is an advantage that the tensile strength is excellent, and the strength after the processing is less likely to vary.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0017]
The end fixing device according to the first embodiment shown in FIG. 1 is provided with a circular enlarged portion 2 having a diameter larger than that of the reinforcing bar 1 at the end of the reinforcing bar 1 so as to be coaxial. A structure in which a male screw 3 is formed on the outer peripheral surface of the enlarged diameter portion 2, and a disk-shaped fixing plate 5 having an internally threaded female screw 4 formed on the inner peripheral surface is externally screwed to the enlarged diameter portion 2. It has become.
[0018]
The end fixing device according to the second embodiment shown in FIG. 2 is different from the end fixing device according to the first embodiment in that a screwless portion 6 is provided on the outer peripheral surface of the enlarged diameter portion 2 at the end on the rebar 1 side. The fixing plate 5 screwed to the male screw 3 can be screwed to the position of the unthreaded portion 6 and fixed.
[0019]
The end fixing device of the third embodiment shown in FIG. 3 is provided integrally with an end of a reinforcing bar 1 having a coaxial center with a circular enlarged portion 2 having a larger diameter than the reinforcing bar 1. A fastening member 8 is screwed into a fixing plate 7 attached to the reinforcing bar 1 so as to fit on the enlarged diameter portion 2.
[0020]
The fixing plate 7 is formed in a disk or a cylindrical shape, and has an inner diameter formed by a fitting hole 9 having an inner diameter adapted to the reinforcing bar 1 and an outer fitting hole 11 having an inner diameter fitted to the enlarged diameter portion 2. A female screw 12 is formed on the inner peripheral surface of the fitting hole 11 on the opening end side.
[0021]
The fastening member 8 has a disk shape that closes the outer fitting hole 11, and a male screw 13 that is compatible with the female screw 12 is formed on an outer peripheral surface thereof.
[0022]
The fixing plate 7 is inserted into the reinforcing bar 1 before the processing of the enlarged diameter portion 2, and the fixing plate 7 is slid after the processing of the enlarged diameter portion 2 so that the outer fitting hole 11 is formed in the enlarged diameter portion 2 of the reinforcing bar 1. The fastening member 8 is screwed to the opening end side inside the outer fitting hole 11 in a state where the enlarged diameter portion 2 is fitted and prevented from being removed by the enlarged diameter portion 2, so that the enlarged diameter portion 2 is axially moved by the fixing plate 7 and the fastening member 8. The fixing plate 7 is fixed to the reinforcing bar 1 by being sandwiched between the reinforcing bars 1.
[0023]
The end fixing device according to the fourth embodiment shown in FIG. 4 is different from the end fixing device according to the third embodiment in that the inside diameter of the outer fitting hole 11 provided in the fixing plate 7 The diameter is larger than the diameter, the fastening member 8 is set to have an outer diameter to be screwed into the outer fitting hole 11, and the fastening member 8 is provided with a fitting concave hole 14 for fitting to the enlarged diameter portion 2. .
[0024]
The end fixing device according to the fifth embodiment shown in FIG. 5 is provided integrally with an end portion of a reinforcing bar 1 having a coaxial center with a circular enlarged portion 2 having a larger diameter than the reinforcing bar 1. A fixing plate 15 externally fitted to the enlarged diameter portion 2 and a fastening member 16 inserted into the reinforcing bar 1 are screwed together.
[0025]
The fixing plate 15 is formed by providing a bottomed outer fitting hole 17 for the enlarged diameter portion 2 and a female screw hole 18 having a diameter larger than the outer fitting hole 17 and opening on one surface side. Reference numeral 16 denotes an inner diameter fitted to the reinforcing bar 1, and a male screw 19 having an outer diameter is screwed into the female screw hole 18.
[0026]
The fastening member 16 is inserted into the reinforcing bar 1 before processing the enlarged diameter portion 2, and the outer fitting hole 17 of the fixing plate 15 is fitted into the enlarged diameter portion 2 after processing the enlarged diameter portion 2, and the fastening member 16 is fixed to the fixing plate 2. When screwed into the female screw hole 18, the fixing plate 15 is fixed to the rebar 1 by sandwiching the enlarged diameter portion 2 between the fixing plate 15 and the fastening member 16 in the axial direction.
[0027]
The end fixing device according to the sixth embodiment shown in FIG. 6 is different from the end fixing device according to the fifth embodiment in that the fixing plate 15 has a bottomed outer fitting hole 17 for the enlarged diameter portion 2. The outer fitting hole 17 is made larger in diameter than the enlarged diameter portion 2, a female screw 20 is machined on the inner peripheral surface thereof, and the fastening member 16 has an outer diameter that is screwed into the outer fitting hole 17. , And has a structure in which a fitting concave hole 21 that fits outside the enlarged diameter portion 2 is provided.
[0028]
The end fixing device according to the seventh embodiment shown in FIG. 7 is different from the end fixing device according to the fifth embodiment in that the outer fitting portion of the fixing plate 15 with respect to the reinforcing bar 1 is a cylindrical portion 22 having a one-step smaller diameter. A female screw 23 is formed on the inner surface of the cylindrical portion 22, and the fastening member 16 has a long cylindrical shape screwed into the cylindrical portion 22.
[0029]
In the end fixing device according to the eighth embodiment shown in FIG. 8, a circular enlarged portion 2 having a larger diameter than the reinforcing bar 1 is integrally provided at the end of the reinforcing bar 1 so as to be coaxial. An annular fixing plate 24 that is prevented from falling off at the enlarged diameter portion 2 and a disk-shaped fastening member 25 located on the opposite side of the enlarged diameter portion 2 to the fixing plate 24 are inserted into the reinforcing bar 1, and the fixing is performed. In a state where the plate 24 is sandwiched between the enlarged diameter portion 2 and the fastening member 25, the fastening member 25 is fixed to the reinforcing bar 1 by tightening a screw 25 a screwed from the outer periphery, and the fixing plate 24 is fixed to the reinforcing bar 1. The fixing plate 24 and the fastening member 25 are inserted into the reinforcing bar 1 before the processing of the enlarged diameter portion 2, and the fixing plate 24 and the fastening member 25 are connected to the enlarged diameter portion after the processing of the enlarged diameter portion 2. The fixing plate 24 is fixed to the rebar 1 as shown in the drawing.
[0030]
The end fixing device according to the ninth embodiment shown in FIG. 9 is provided integrally with an end of a reinforcing bar 1 having a coaxial center with a circular enlarged portion 2 having a larger diameter than the reinforcing bar 1. An insertion hole 27 having an inner diameter passing through the large-diameter portion 2 and a screw hole 28 having a diameter larger than the insertion hole 27 are provided in the fixing plate 26 in a penetrating manner, and a split retaining member 29 and a fastening member 30 are used. The fixing plate 26 is fixed to the reinforcing bar 1.
[0031]
The split retaining member 29 has an inner diameter fitted to the reinforcing bar 1 and an outer diameter equal to the outer diameter of the enlarged-diameter portion 2, and is fixed to an end of the semi-cylindrical portion 31 fitted externally to the reinforcing bar 1. An engagement ridge 32 having an outer diameter that is larger than the enlarged diameter portion 2 and is accommodated in the screw hole 28 is provided so as to be divided into two.
[0032]
The split retaining member 29 is assembled by fitting the reinforcing bar 1 with the enlarged diameter portion 2 at the end so that the engaging ridge 32 is positioned on the enlarged diameter portion 2 side, and is inserted into the reinforcing bar 1. When the fixing plate 26 is moved toward the enlarged-diameter portion 2 and the insertion hole 27 is fitted into the semi-cylindrical portion 31, the retaining member 29 is held in a cylindrical shape, and the screw hole 28 is enlarged. The fixing ridge 32 is located outside the portion 2, and the engaging ridge 32 abuts on the step of the enlarged diameter portion 2, and the step of the insertion hole 27 and the screw hole 28 abuts on the engaging ridge 32. Reference numeral 26 denotes a state in which it is prevented from coming off on the enlarged diameter portion 2 side.
[0033]
Further, the fastening member 30 is formed in a cap shape which is fitted to the outer diameter portion 2 and screwed into the screw hole 28 of the fixing plate 26 into which the external thread 33 is inserted. The fixing plate 26 is fixed to the reinforcing bar 1 by sandwiching the engagement ridge 32 from the axial direction between the engagement protrusion 26 and the fastening member 30.
[0034]
An end fixing device according to a tenth embodiment shown in FIG. 10 is a modified example of the ninth embodiment. The fixing plate 26 has an outer fitting hole 34 for the enlarged diameter portion 2 and an outer fitting hole. A screw hole 35 having a diameter larger than that of the fixing plate 26 is provided. The fastening member 30 is formed in a cylindrical shape having an inner diameter that fits into the half cylindrical portion 31 of the divided retaining member 29. When the fastening member 30 inserted into the reinforcing bar 1 is screwed into the screw hole 35 of the fixing plate 26 in a state of being fitted to the enlarged diameter portion 2, the split retaining member 29 is held in a cylindrical shape, and the engagement protrusion is formed. When the ridge 32 abuts on the step of the enlarged diameter portion 2 and the end of the fastening member 30 abuts on the engagement ridge 32, the fixing plate 26 is fixed to the enlarged diameter portion 2 in a retaining state. .
[0035]
As in the ninth and tenth embodiments, the diameter of the insertion hole 27 and the screw hole 28 of the fixing plate 26 or the diameter of the outer fitting hole 34 and the screw hole 35 is determined by using the split retaining member 29 as described above. By processing the enlarged diameter portion 2 at the end of the reinforcing bar 1, the fixing plate 26 can be inserted into the reinforcing bar 1, and the fixing plate 26 can be retrofitted. The fixing work of the fixing plate 26 can be performed smoothly.
[0036]
The end fixing device according to the eleventh embodiment shown in FIG. 11 uses a threaded reinforcing bar 1a as a reinforcing bar, and has an inner peripheral surface of a cylindrical body 36 which is externally fitted to a threaded reinforcing bar 1a having an external thread 1b formed on an outer peripheral surface. Then, a female screw 37 to be screwed to the male screw 1b is machined, and a fixing plate 39 is externally screwed to a male screw 38 formed on the outer peripheral surface of the cylindrical body 36, so that the fixing plate 39 is fixed to the reinforcing bar 1a. It was made.
[0037]
The end fixing device of the twelfth embodiment shown in FIG. 12 uses a threaded bar 1a as a reinforcing bar, and directly fixes the fixing plate 39 to a threaded bar 1a having an external thread 1b formed on the outer peripheral surface. A fixing member 41 having a female screw 40 screwed to the male screw 1b is screwed into a position on both sides of the fixing plate 39, and the fixing plate 39 is tightened from both sides with the fixing member 41, thereby fixing the fixing plate 39 to the reinforcing bar 1a. It is intended to be fixed to.
[0038]
The fixing plate 39 may be formed by processing an inner diameter of a female screw screwed into the threaded bar 1a.
[0039]
In this way, if the fixing plate 39 is fixed to the screw-bar rebar 1a by using the male screw 1b of the screw-bar rebar 1a, it is only necessary to process a screw on the cylindrical body 36 or the fixing plate 39, and the fixing plate 39 The structure of the end fixing device can be simplified.
[0040]
In the first to tenth embodiments, the reinforcing bar 1 can use not only a round bar reinforcing bar, but also a deformed reinforcing bar or a threaded bar reinforcing bar. In the mold for forming the outer diameter, the rebar 1 is expanded in diameter by pressing in the axial direction, and finished in a circular axis shape. Good.
[0041]
Further, since the enlarged diameter portion 2 is formed integrally with the reinforcing bar 1, unlike a connection such as friction welding, the tensile strength is excellent due to the integration of materials, and the variation in strength after processing is small. Things.
[0042]
Further, the outer diameter and the length of the enlarged diameter portion 2 with respect to the reinforcing bar 1 may be arbitrarily set within a range for improving the tensile strength, and the outer diameter and the shape of the fixing plates 5, 7, 15, and 24 are also circular. In addition, it may be set in a range that ensures fixing strength, such as a square, a polygon, and a shape having a bent portion.
[0043]
The end fixing device according to the present invention is configured as described above, and in the first to tenth embodiments, is extended to the end of the reinforcing bar buried in concrete facing the connection portion between the column and the beam. While processing the diameter part 2 integrally with the reinforcing bar 1, and using the fixing plate 5 or the fixing plates 7, 15, 24 and the fastening members 8, 16, 25, the enlarged diameter part 2 is used for retaining in the axial direction. If the fixing plates 5, 7, 15, and 24 are fixed to the ends of the reinforcing bar 1, the ends of the reinforcing bars 1 are expanded by the fixing plates 5, 7, 15, and 24, and are embedded in concrete. The rebar 1 thus made is prevented from moving in the axial direction by the fixing plates 5, 7, 15, and 24, so that the fixing force is increased and the strength of the concrete is maintained.
[0044]
The third to tenth embodiments have the advantage that the machining of the enlarged diameter portion 2 becomes possible at the site because machining of the external thread is not required for the enlarged diameter portion 2, and the modification of the arrangement error can be easily performed. In the eleventh and twelfth embodiments, since the male screw 1b of the threaded bar 1a is used, there is no need to process the reinforcing bar on site, and the same advantages as described above are obtained.
[0045]
【The invention's effect】
As described above, according to the present invention, the enlarged diameter portion having a larger diameter than the reinforcing bar is provided at the end of the reinforcing bar, and the enlarged diameter portion is used for preventing the detachment in the axial direction, and the fixing plate is fixed to the end of the reinforcing bar. Since the expanded portion of the rebar is integrated with the rebar, it has excellent tensile strength, and there is no variation in tensile strength.Therefore, the fixing strength of the fixing plate to the end of the rebar is reduced. It is possible to increase the fixing force and improve the reliability of the reinforcement arrangement.
[0046]
In addition, the processing of the enlarged diameter portion integrated with the reinforcing bar can be performed by pressing the reinforcing bar in the axial direction, and expensive equipment such as friction welding is not required. Can be provided.
[0047]
Furthermore, if the fixing plate is fixed to the threaded rebar using the male screw of the threaded rebar, it is only necessary to process the screw on the cylinder or the fixing plate, and the structure of the fixing device at the end of the fixing plate is simplified. Can be
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional front view showing a first embodiment of a reinforcing bar end fixing device according to the present invention; FIG. 2 is a longitudinal sectional view showing a second embodiment of a reinforcing bar end fixing device according to the present invention; FIG. 3 is a longitudinal sectional front view showing a third embodiment of the rebar end fixing device according to the present invention; FIG. 4 is a longitudinal sectional front view of the rebar end fixing device according to the present invention; FIG. 5 is a longitudinal sectional front view showing a fifth embodiment of the reinforcing bar end fixing device according to the present invention. FIG. 6 is a longitudinal sectional front view showing a sixth embodiment of the reinforcing bar end fixing device according to the present invention. FIG. 7 is a longitudinal front view showing a seventh embodiment of the reinforcing bar end fixing device according to the present invention. FIG. 8 is an eighth longitudinal view showing a reinforcing bar end fixing device according to the present invention. FIG. 9 is a longitudinal sectional front view showing an embodiment. FIG. 10 is a longitudinal sectional front view showing a ninth embodiment of the end fixing device. FIG. 10 is a longitudinal sectional front view showing a tenth embodiment of the rebar end fixing device according to the present invention. FIG. 12 is a longitudinal sectional front view showing an eleventh embodiment of the reinforcing bar end fixing device. FIG. 12 is a longitudinal sectional front view showing a twelfth embodiment of the reinforcing bar end fixing device according to the present invention.
DESCRIPTION OF SYMBOLS 1 Reinforcing bar 1a Screw joint reinforcing bar 2 Enlarged diameter part 3 Male screw 4 Female screw 5 Fixing plate 6 No screw part 7 Fixing plate 8 Fastening member 9 Fitting hole 11 Outer fitting hole 12 Female screw 13 Male screw 14 Fitting concave hole 15 Fixing plate 16 Fastening member 17 external fitting hole 18 female screw hole 19 male screw 20 female screw 21 fitting concave hole 22 cylindrical part 23 female screw 24 fixing plate 25 fastening member 26 fixing plate 27 insertion hole 28 screw hole 29 split retaining member 30 fastening member 31 semi-cylindrical portion 32 Engagement ridge 33 Male screw 34 External fitting hole 35 Screw hole 36 Cylindrical body 37 Female screw 38 Male screw 39 Fixing plate 40 Female screw 41 Fastening member

Claims (8)

An enlarged portion having a larger diameter than the reinforcing bar is provided at the end of the reinforcing bar, a male screw is formed on an outer peripheral surface of the enlarged portion, and a fixing plate formed with a female screw compatible with the male screw on an inner peripheral surface is formed by the expanding portion. The end fixing device of the rebar which is externally screwed into the. An enlarged diameter portion having a diameter larger than that of the reinforcing bar is provided at an end of the reinforcing bar, and an outer fitting hole is provided in the fixing plate inserted into the reinforcing bar so as to prevent the enlarged diameter portion from falling off. An end fixing device for a reinforcing bar in which a fastening member is screwed to the opening end side of the hole. An enlarged portion having a larger diameter than the reinforcing bar is provided at the end of the reinforcing bar, and a fastening member inserted into the reinforcing bar so as to prevent the enlarged portion from falling off and a fixing plate externally fitted to cover the enlarged portion are screwed together. Rebar end fixing device. An enlarged diameter portion having a diameter larger than that of the reinforcing bar is provided at the end of the reinforcing bar, and a fixing plate which is prevented from falling off at the enlarged diameter portion of the reinforcing bar, and a fastening member located on the opposite side of the enlarged diameter portion with respect to the fixing plate. An end fixing device for a reinforcing bar in which a fixing member is fixed to a reinforcing bar in a state where the fixing plate is inserted and the fixing plate is sandwiched between the enlarged diameter portion and the fixing member. At the end of the reinforcing bar is provided an enlarged portion with a diameter larger than the reinforcing bar, an insertion hole having an inner diameter passing through the enlarged portion on the fixing plate, and a screw hole having a diameter larger than this insertion hole are provided in a penetrating manner. A split retaining member having an inner diameter fitted into the reinforcing bar and an outer diameter larger than the enlarged diameter portion which is accommodated in the screw hole and holds the fixing plate inserted into the reinforcing bar in a retaining shape, An end fixing device for a rebar in which a fastening member is screwed into a screw hole of a fixing plate in a state of being fitted to the enlarged diameter portion. An enlarged diameter portion having a diameter larger than that of the reinforcing bar is provided at an end of the reinforcing bar, and an outer fitting hole to the enlarged diameter portion and a screw hole having a diameter larger than the outer fitting hole are provided in the fixing plate. A split retaining member having an outer diameter that is larger than the enlarged diameter portion that is accommodated in the screw hole and the inner diameter to be combined, holds the fastening member inserted into the reinforcing bar in a retaining shape, and An end fixing device for a rebar in which a fastening member is screwed into a screw hole of an externally fitted fixing plate. An end fixing device for a rebar in which a threaded rebar is used as a rebar, a cylinder is externally screwed into the threaded rebar, and a fixing plate is externally screwed onto the cylinder. An end of a rebar in which a fixing plate is externally fitted to the threaded rebar using a threaded rebar as a rebar, and the fixing plate is fixed to a fastening member externally screwed to the threaded rebar so as to be positioned on both sides of the fixing plate. Part fixing device.

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