JP4469490B2 - Reinforcing bar joint structure and joining method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a joining structure and joining method for reinforcing bars.
[0002]
[Prior art]
Conventionally, as a method of joining ends of reinforcing bars used in a reinforced concrete structure, reinforcing bars 102 and 103 to be joined are inserted into a metal sleeve 101 and grout mortar is inserted into the sleeve 101 as shown in FIG. There is a way to inject.
[0003]
Also, a method of butt welding the joints 104 of the rebars 102 and 103 as shown in FIG. 8, a method of heating and crimping the ends with a gas flame, and a welded portion of the rebars 102 and 103 as shown in FIG. A method of welding with metal W is also known.
[0004]
[Problems to be solved by the invention]
In the conventional method of joining the sleeve 101 to the grout mortar, since it takes a long time to harden the grout mortar, the joining rebars 102 and 103 cannot be moved for a long time. There was a problem requiring attention in processing.
[0005]
Further, in the above-described welding method, there is a problem that variations in welding strength and the like occur in the case of welding in a narrow place where rebars are intricate or welding outdoors in a strong wind. Also, in recent years, there are few welders, and it is difficult to secure personnel.
[0006]
Further, the sleeve 101 has a large diameter, and in the welding described above, pressure welding bumps and overlapping projections are generated, and when the reinforcing bars are arranged in a complicated manner, they are adjacent to each other in the sleeve 101 or the welding portion. The space between the rebars becomes narrow, and there is a problem with the strength of the concrete.
[0007]
Therefore, an object of the present invention is to provide a reinforcing bar joining structure and a joining method that solve the above-mentioned problems.
[0008]
[Means for Solving the Problems]
In order to solve the above problems, a first invention according to claim 1, knitted material or woven or bandage-like sheet formed of a nonwoven fabric, the joint over the junction of each of the plurality of reinforcing bars to be joined The reinforcing bar joining structure is characterized in that the reinforcing bars are spirally arranged so as to wrap the reinforcing bars and the sheet is bonded to the reinforcing bars by a resin.
2nd invention of Claim 2 is arrange | positioned so that the sheet | seat of the 2nd sheet | seat formed of the knitted fabric, the woven fabric, or the nonwoven fabric may sandwich the rebar of the joint part over each joint part of the some rebar to be joined, And it is the joining structure of the reinforcing bar characterized by the sheet | seat being adhere | attached on the reinforcing bar with resin.
[0010]
A third invention according to claim 3, placing the dressing-like sheet formed by knitted or woven or nonwoven fabric, a helically wrap the reinforcement of the joint over the junction of each of the plurality of reinforcing bars to be joined The sheet is impregnated with an uncured resin, the sheet is brought into close contact with the reinforcing bar, and then the resin is cured.
[0011]
A fourth invention according to claim 4, impregnated with uncured resin bandage-like sheet formed by knitted or woven or nonwoven, its seat in the uncured state of the resin, a plurality of reinforcing bars to be joined It is a method for joining reinforcing bars, characterized in that it is spirally wound so as to wrap the reinforcing bars of the joints over the respective joints, and is closely attached to the reinforcing bars, and then the resin is cured.
[0012]
A fifth invention of the fifth aspect, a dressing-like sheet formed by knitted or woven or non-woven, wound in helically wrap the reinforcement of the joint over the junction of each of the plurality of reinforcing bars to be joined It is a method for joining reinforcing bars, which is characterized by placing the sheet, impregnating the sheet with an uncured resin thereafter, bringing the sheet into close contact with the reinforcing bar, and then curing the resin.
[0013]
Sixth invention described in claim 6, the two sheets formed by the knitted or woven or nonwoven, as well as arranged so as to sandwich the reinforcing bar of the joint over the junction of each of the plurality of reinforcing bars to be joined A method for joining reinforcing bars, comprising impregnating an uncured resin in the sheet, bringing the sheet into close contact with the reinforcing bar, and then curing the resin.
Seventh invention is according to claim 7, impregnated with an unhardened resin on the two sheets formed by the knitted or woven or nonwoven, its seat in the uncured state of the resin, a plurality of reinforcing bars to be joined The reinforcing bars are bonded to the reinforcing bars so as to sandwich the reinforcing bars of the joints over the respective joints, and then the resin is cured.
Eighth aspect of the eighth aspect, the two sheets formed by the knitted or woven or nonwoven, and arranged so as to sandwich the reinforcing bar of the joint over the junction of each of the plurality of reinforcing bars to be joined, Thereafter, the sheet is impregnated with uncured resin, the sheet is brought into close contact with the reinforcing bar, and then the resin is cured.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
The embodiment shown in FIGS. 1 to 6 will be described.
[0015]
FIG. 1 shows a first embodiment.
[0016]
In FIG. 1, reference numerals 1 and 2 denote reinforcing bars to be joined. The reinforcing bars 1 and 2 are deformed reinforcing bars. Reference numeral 3 denotes a bonding sheet, which is formed of a high-strength fiber knitted or woven into a fine mesh, or a non-woven fabric made of high-strength fiber. Here, the high-strength fiber is a fiber made of a material having high strength and light weight among high-performance fibers, such as carbon fiber, aramid fiber (for example, trade name Kepler or trade name Technora (registered trademark)), and vinylon fiber. Etc. Then, one wide sheet 3 is used as this sheet, and this is impregnated with an uncured liquid resin 4. As the resin 4, a resin having adhesiveness and curability is used. For example, a thermosetting or photocurable epoxy resin or the like is used.
[0017]
Next, while the impregnated resin is in an uncured state, the sheet 3 is wound around both the reinforcing bars 1 and 2 so as to wrap the joints over the joints of the reinforcing bars 1 and 2 to be joined. Let
[0018]
After the sheet 3 is wound, the resin 4 is cured by the outside air temperature or light, and the sheet 3 is bonded to both the reinforcing bars 1 and 2 so that the both reinforcing bars 1 and 2 are joined.
[0019]
The sheet 3 itself is first wound around the joint between the rebars 1, 2, and then the sheet 3 is impregnated with the uncured resin 4. May be joined.
[0020]
FIG. 2 shows a second embodiment.
[0021]
The second embodiment uses a sheet 3A such as a narrow bandage formed of the same material as that of the sheet 3, and this is used as shown in FIG. Wrapped like a wrap. Similarly to the first embodiment, the sheet 3A is impregnated with the same resin 4 as before, before or after the sheet 3 is wound, and both the sheets 3A are loaded as in the first embodiment. Adhere to the reinforcing bars 1 and 2. Also in the second embodiment, both the reinforcing bars 1 and 2 are joined by the hardening of the resin 4.
[0022]
FIG. 3 shows a third embodiment.
[0023]
In the third embodiment, two sheets 3B and 3C formed of the same material as that of the sheet 3 are laminated so as to sandwich both the reinforcing bars 1 and 2 therebetween. Similarly to the first embodiment, the two sheets 3B and 3C are impregnated with the same resin 4 as described above before or after the sheets 3B and 3C are bonded. Adhere to the reinforcing bars 1 and 2. In the third embodiment, the two sheets 3B and 3C are bonded to each other as the resin 4 is cured, and the two reinforcing bars 1 and 2 are joined together by the two sheets 3B and 3C.
[0024]
In each of the above-described embodiments, the arrangement direction of the fibers of the sheets 3, 3A, 3B, and 3C may be arranged in the axial direction of the reinforcing bar and in the direction orthogonal to the axial direction. May be arranged in an inclined direction.
[0025]
In addition, as a joining form of a reinforcing bar, there are a linear shape shown in FIG. 4, a T shape shown in FIG. 5, and a cross shape shown in FIG. 6, but these sheets 3, 3 A, 3 B, Reinforcing bars 1, 2, 5, 6 can be joined using 3C and resin 4. In the case of such a T-shape or a cross shape, the bandage-shaped sheet 3A is easily wound.
[0026]
Moreover, this invention can be used for the joining of the reinforcing bars in a precast concrete member, and the joining of the reinforcing bars in an in-situ concrete construction.
[0027]
【The invention's effect】
As described above, according to the present invention, the sheet impregnated with the uncured resin is brought into close contact with the reinforcing bar joint so as to wrap the sheet, or the sheet is disposed so as to wrap the reinforcing bar joint. Since the sheet is impregnated with uncured resin and the sheet is closely attached to the joint of the reinforcing bars, the reinforcing bars are joined by the subsequent curing of the resin, so that the following effects can be exhibited.
[0028]
(1) Since welding, which is a special skill, is not used, a welder is not required when joining the reinforcing bars, and a person other than the welder can deal with it even when a sudden joining operation is required.
[0029]
(2) Even when joining in narrow places or windy places, there is no variation in joining strength compared to welding.
[0030]
{Circle around (3)} The resin cures faster than conventional grout mortar for sleeve joining, and processing such as assembling of adjacent reinforcing bars becomes easy.
[0031]
(4) Since the joining material is in the form of a sheet, the joining portion becomes thinner than the pressure welding bumps, overlapped projections and sleeves seen in the conventional welding method, making it easier to place the bars. .
[0032]
(5) Since the sheet is light and easy to handle, its transportation, storage and construction are easy.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a first embodiment of the present invention.
FIG. 2 is a perspective view showing a second embodiment of the present invention.
FIG. 3 is a perspective view showing a third embodiment of the present invention.
FIG. 4 is a front view in which the present invention is applied to a form in which reinforcing bars are joined linearly.
FIG. 5 is a front view in which the present invention is applied to a form in which reinforcing bars are joined in a T-shape.
FIG. 6 is a front view in which the present invention is applied to a form in which reinforcing bars are joined in a cross shape.
FIG. 7 is a cross-sectional view showing joining of reinforcing bars by a conventional sleeve.
FIG. 8 is a front view showing joining of reinforcing bars by conventional butt welding or gas pressure welding.
FIG. 9 is a front view showing joining of reinforcing bars by conventional overlap welding.
[Explanation of symbols]
1, 2 Reinforcing bar 3 Sheet 4 Resin

Claims (8)

A band-like sheet formed of a knitted fabric, a woven fabric, or a non-woven fabric is disposed in a spiral shape so as to wrap the reinforcing bars of the joints across the joints of the plurality of reinforcing bars to be joined, and the sheets are formed into the reinforcing bars by a resin. Reinforcing bar joint structure characterized by being bonded. Two sheets formed of knitted fabric or woven fabric or non-woven fabric are arranged so as to sandwich the reinforcing bars of the joints across the joints of the plurality of reinforcing bars to be joined, and the sheets are bonded to the reinforcing bars by the resin Reinforcing bar joint structure characterized by being made. A banded sheet formed of knitted fabric, woven fabric or non-woven fabric is arranged in a spiral shape so as to wrap the reinforcing bars of the joints across the joints of the plurality of reinforcing bars to be joined, and the sheet is impregnated with uncured resin Then, the sheet is brought into close contact with the reinforcing bar, and then the resin is cured. A bandage-like sheet formed of knitted fabric, woven fabric or non-woven fabric is impregnated with an uncured resin, and the sheet is uncured in the uncured state of the sheet over the joints of a plurality of reinforcing bars to be joined. A method of joining reinforcing bars, characterized in that the resin is cured after being wound in a spiral shape so as to wrap the wire. A band-like sheet formed of a knitted fabric, a woven fabric or a non-woven fabric is spirally wound around each joint of a plurality of reinforcing bars to be joined so as to wrap the reinforcing bars of the joints, and then an uncured resin is placed. A method for joining reinforcing bars, wherein the sheet is impregnated, the sheet is brought into close contact with the reinforcing bars, and then the resin is cured. Two sheets formed of a knitted fabric, a woven fabric or a non-woven fabric are arranged so as to sandwich the reinforcing bars of the joints across the joints of the plurality of reinforcing bars to be joined, and the sheets are impregnated with an uncured resin. A method of joining the reinforcing bars, wherein the sheet is brought into close contact with the reinforcing bars and then the resin is cured. Two sheets formed of knitted or woven or non-woven fabric are impregnated with an uncured resin, and the sheet is uncured in the uncured state of the sheet over the joints of a plurality of reinforcing bars to be joined. A method for joining reinforcing bars, characterized in that the resin is hardened in close contact with the reinforcing bars so as to sandwich the steel. Two sheets formed of a knitted fabric, a woven fabric or a non-woven fabric are arranged so as to sandwich the reinforcing bars of the joints across the joints of the plurality of reinforcing bars to be joined, and then the uncured resin is applied to the sheets. A method for joining reinforcing bars, characterized by impregnating the sheet so that the sheet is in close contact with the reinforcing bars and then curing the resin.

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