JP5952095B2 - Rebar connection method and rebar joint - Google Patents

Description

  The present invention relates to a reinforcing bar connecting method and a reinforcing bar joint used for connecting reinforcing bars in a reinforced concrete structure, a steel reinforced concrete structure, a precast concrete structure and the like.

  In conventional reinforced concrete construction, steel reinforced concrete construction, precast concrete construction, etc., as a conventional reinforcement connecting method used to connect reinforcing bars, a method called a lap joint or a method called a mechanical joint is generally used. There is.

  Reinforcement connection method called lap joint is a method to overlap the ends of reinforcing bars with the required length specified by the building construction standard specifications according to the type of reinforcing bar, concrete design standard strength, reinforcing bar end shape, and reinforcing bar diameter. After that, the ends of the superposed reinforcing bars are connected by binding with a binding wire, and then the reinforcing bars connected by the binding wire are solidified with concrete so as to connect the ends of the reinforcing bars. (For example, refer to Patent Document 1).

  On the other hand, a reinforcing bar connection method using a mechanical joint is a method of mechanically connecting reinforcing bars. As the reinforcing bar connecting method, for example, a male screw part is formed at each end of a reinforcing bar to be connected, and the reinforcing bar is connected. A method in which the ends of the reinforcing bars are connected to each other by fitting the female threads formed on the inner side of the screw cylinder to the male threads of the ends. A cylindrical sleeve having a diameter larger than the outer shape of the reinforcing bar is arranged concentrically outside the reinforcing bars arranged in series and the mortar is solidified by filling the sleeve with mortar. By doing so, there is a method of connecting the ends of the reinforcing bars (see, for example, Patent Document 3).

JP 2000-249501 A JP 2011-1765 A Japanese Patent Laid-Open No. 54-137721

  However, in order to obtain the required strength, the length described in Patent Document 1 requires that the length of overlapping the ends of the reinforcing bars be equal to or greater than the specified value specified in the building construction standard specifications. is there. For this reason, when using lap joints to connect reinforcing bars in precast concrete construction, it is necessary to leave a gap longer than the length of overlapping the ends of the reinforcing bars between the precast concrete members. , It takes time for the concrete to fill the gap. Therefore, there exists a problem that the work efficiency which connects a reinforcing bar is bad.

  On the other hand, it is necessary to rotate the screw cylinder with respect to the reinforcing bar, or to align the screw cylinder and the reinforcing bar, and it is very troublesome to connect the reinforcing bars. Get rid of. Further, unless the screw pitch of the male screw portion of one reinforcing bar matches the screw pitch of the male screw portion of the other reinforcing rod, the screw cylinder cannot be screwed together. Therefore, there exists a problem that the work efficiency which connects a reinforcing bar is bad.

  Moreover, since what was described in the said patent document 3 connects rebars by filling a mortar in a sleeve, it is necessary to confirm that the mortar can be filled in the sleeve uniformly. However, since the sleeve is cylindrical, it is difficult to check whether the grout can be uniformly filled into the sleeve from the outside. Therefore, there is a problem that the confirmation work of the mortar takes time and the work efficiency of connecting the reinforcing bars is poor.

  Therefore, the present invention intends to provide a reinforcing bar connecting method and a reinforcing bar joint that enable efficient connection of reinforcing bars.

In order to solve the above-mentioned problem, the present invention corresponds to claim 1 and includes a step of overlapping the ends of reinforcing bars to be connected to form an overlapping portion, and each reinforcing bar at both end portions of the overlapping portion. filling a step of connecting the connecting fitting, an adhesive on a portion other than the portion to which the connecting portion where the connecting fitting which definitive in the recess to be formed is arranged between each rebar that the said connecting fitting is arranged And a reinforcing bar connecting method .

According to a second aspect of the present invention, the step of overlapping the connecting members on the end portions of the reinforcing bars to be connected in series to form the overlapping portions at the end portions of the reinforcing bars, and both end portions of the overlapping portions In the step of connecting the reinforcing bars via the connecting member by connecting the connecting member and the reinforcing bars with a connecting bracket, and a recess formed between the connected connecting member and the reinforcing bars. a step portion and the connecting fitting definitive the connecting fitting is arranged to fill the adhesive in a portion other than the portion that is located, and rebar connection with.

Further, in accordance with claim 3, the connecting bracket uses a connecting bracket including a reinforcing bar clamp portion having a shape along the outer shape of the overlapped portion, and a tightening portion continuous to the reinforcing bar clamp portion. The step of connecting the reinforcing bars is performed by tightening the tightening portion of the connecting bracket on the side opposite to the side where the concrete cover thickness is reached when placing the concrete around the reinforcing bars when viewed from the overlapped portion. It is set as the structure made to do.

Furthermore, in response to claim 4, a connecting fitting which concatenates the respective rebar end portions of the overlapping portion formed by overlapping the ends of the reinforcing bars to be connected, connected by the connecting fitting an adhesive in which the connecting fitting which definitive the recess portion and the connecting fitting which is arranged filling the portion other than the portion that is arranged to be formed between the reinforcing bar is, the reinforcing bar joint comprising a.

Further, according to claim 5, a connecting member arranged so as to be overlapped with an end portion of each reinforcing bar to be connected in series to form an overlapping portion at the end portion of each reinforcing bar, and each of the above overlapping portions a connecting fitting which is consolidated and the connecting member and the respective reinforcing bars in both ends of the section, the connecting metal fitting definitive in a recess formed between the connecting member and the respective reinforcing bars are connected by the connecting fitting It is set as the reinforced joint provided with the part with which it is arrange | positioned, and the adhesive agent filled in parts other than the part where the said coupling metal fitting is arrange | positioned .

Furthermore, in response to claim 6, upper Killen sintered metal has a reinforcing bar clamp portion which is shaped along the outer shape of the overlapping portion, Ri Oh provided continuously to the iron muscle clamping unit, and viewed from the overlapping portion And a tightening portion that is tightened on the side opposite to the side where the concrete is covered when the concrete is placed around the reinforcing bars to be connected .

According to the reinforcing bar connecting method and the reinforcing bar joint of the present invention, the following excellent effects are exhibited.
(1) forming an end portion was overlapped portion overlapped each other rebar to be connected, a step of connecting the two end portions in connecting the respective rebar fitting of the overlapping portion, between each rebar that the connecting rebar connection with the step of partial and the connecting fitting the connecting fitting which definitive in a recess formed is arranged to fill the adhesive in a portion other than the portion that is located, the, and, rebar to be connected a connecting fitting which concatenates the respective rebar end portions of the overlapping portion formed by overlapping the ends, the connecting metal fitting definitive in a recess formed between the reinforcing bars are connected by the connecting fitting There the adhesive filled in the portion other than the portion portion and the connecting fitting which is arranged is arranged, so are the rebars joint Ru equipped with, it is possible to easily perform connection rebar, adhesive Easily check the filling condition of the agent Can. Therefore, the reinforcing bars can be connected efficiently. In addition, since the concave portion formed between the connected reinforcing bars is filled with an adhesive, the adhesive can receive a tensile force generated in the longitudinal direction of the reinforcing bar as a compressive shearing force. Therefore, the length of overlapping the ends of the reinforcing bars can be made shorter than when using a lap joint. Therefore, in precast concrete construction, it is possible to reduce the time required for placing concrete to fill the space between the precast concrete members, and to make the precast concrete member advantageous. Furthermore, since the reinforcing bars are connected to each other at both end portions of the overlapping portion, the stirrups and the stirrups can be arranged avoiding the connecting portion of the overlapping portion. Therefore, it is possible to prevent the winding diameter of the stirrup or the stirrup from becoming small.
(2) Also, a step of superimposing a connecting member on the ends of reinforcing bars to be connected in series to form overlapping portions at the ends of the reinforcing bars, and the connecting members at both end portions of the overlapping portions, a step of connecting the respective rebar through the connecting member by linking with connecting fitting and the respective rebar, definitive said connecting fitting in a recess formed between the connecting member and the respective rebar linked is A reinforcing bar connecting method having a portion other than a portion where the connecting metal fitting is arranged and a portion other than the portion where the connecting metal fitting is arranged , and an end portion of each reinforcing bar to be connected in series. a connecting fitting which is consolidated and arranged connecting members to form an overlapping portion on an end portion of the respective reinforcing bars, and the connecting member and the respective reinforcing bars in both end portions of each overlapping portion Te, the connecting fitting Between the connecting member and the rebars connected by And adhesive part and the connecting fitting the connecting fitting is arranged is filled in a portion other than the portion disposed to definitive in a recess made, so are the rebars joint Ru provided with a coupling of reinforcing bars While being able to carry out easily, the filling state of an adhesive agent can be confirmed easily. Therefore, the reinforcing bars can be connected efficiently. In addition, since the concave portion formed between the connected connecting member and each reinforcing bar is filled with the adhesive, the adhesive receives the tensile force generated in the longitudinal direction of the reinforcing bar as the compressive shearing force. be able to. Therefore, the length of overlapping the connecting member on the end portion of each reinforcing bar can be shortened as compared with the case where the lap joint is used. Therefore, in the precast concrete structure, after connecting the reinforcing bars, the time required for placing the concrete to fill the space between the precast concrete members can be shortened, and the structure of the precast concrete member is advantageous. be able to. Furthermore, since each reinforcing bar and the connecting member are connected at both end portions of the overlapped portion, the band and the stirrup can be arranged avoiding the connecting portion of the overlapped portion. Therefore, it is possible to prevent the winding diameter of the stirrup or the stirrup from becoming small.

It is a flowchart which shows one Embodiment of the reinforcing bar connection method of this invention. In embodiment of FIG. 1, it is a schematic plan view which shows the state which piled up the required length for the edge part of the two reinforcing bars which should be connected, and formed the overlap part. FIG. 3 shows an example of a connecting fitting for fastening and connecting two superposed reinforcing bars as shown in FIG. 2, (A) is a schematic side view, and (B) is a schematic front view. FIGS. 3A and 3B show a state in which two reinforcing bars are connected to each other at both end portions of the overlapping portion using the connecting metal fitting shown in FIG. 3, wherein FIG. FIGS. 4A and 4B show a state in which a concave portion between two reinforcing bars connected as shown in FIGS. 4A and 4B is filled with an adhesive, where FIG. 4A is a schematic plan view and FIG. 4B is a schematic front view. It is a flowchart which shows the other form of implementation of the reinforcing bar connection method of this invention. In embodiment shown in FIG. 6, it is a schematic plan view which shows the state which piled up the connection member on the two rebars arrange | positioned in series so that a front-end | tip may be faced | matched, and formed the overlap part. FIGS. 7A and 7B show a state in which both ends of each overlapping portion of the two reinforcing bars and the connecting member shown in FIG. 7 are connected by a connecting metal fitting, where FIG. 7A is a schematic plan view, and FIG. FIGS. 8A and 8B show a state in which the concave portions between the reinforcing bars and the connecting members connected as shown in FIG. 8B are filled with adhesive, where FIG. 8A is a schematic plan view, and FIG. It is. FIG. 5 shows still another embodiment of the method for connecting reinforcing bars according to the present invention, in which (a) is a schematic plan view showing a state in which a concave portion between each reinforcing bar and each connecting member is filled with an adhesive; It is a schematic front view of (A).

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

  FIG. 1 thru | or FIG. 5 (a) (b) shows one Embodiment of this invention, First, the end part of two rebar 1a, 1b which should be connected is made to overlap required length, The overlapping portion 2 is formed at the ends of the two reinforcing bars 1a and 1b. Next, both ends of the overlapping portion 2 are fastened with the connecting metal fitting 3 so that the reinforcing bars 1 a and 1 b are connected with the overlapping portion 2. Next, the recess 6 formed between the connected reinforcing bars 1a and 1b is filled with a paste-like adhesive 7 over the entire length. Thereafter, the adhesive 7 filled in the recess 6 is cured to connect the reinforcing bars 1a and 1b. Thereafter, concrete is placed around the connected reinforcing bars 1a and 1b.

  More specifically, first, as shown in FIG. 2, one end of one reinforcing bar 1a and the other end of the other reinforcing bar 1b connected to the one reinforcing bar 1a are defined in a lap joint in a building construction standard specification or the like. Required length shorter than the length of overlapping the ends of the reinforcing bars, for example, 10% to 80% of the length of overlapping the ends of the reinforcing bars specified in the building construction standard specifications, outer peripheral surface The one reinforcing bar 1a and the other reinforcing bar 1b are arranged parallel to the longitudinal direction of the reinforcing bars 1a and 1b so as to overlap each other, and one end of the one reinforcing bar 1a and the above The overlapping portion 2 is formed at the other end of the other reinforcing bar 1b.

  Next, the one reinforcing bar 1a and the other reinforcing bar 1b are connected by connecting fittings 3 at both end portions of the overlapping portion 2 as shown in FIGS. As shown in FIGS. 3 (a) and 3 (b), the connecting fitting 3 is formed by an arc forming portion and a central flat plate along the outer shape of the reinforcing bars 1a and 1b (the outer shape of the overlapping portion 2) in the overlapping portion 2 indicated by a two-dot chain line. A reinforcing bar clamp portion 4a having a required width, and a tightening portion 4b that protrudes outside the reinforcing bar clamp portion 4a and is provided in a parallel state with a predetermined interval therebetween. The nut 5b is screwed into a bolt 5a passed through a bolt insertion hole provided in 4b so that the rebar clamp portion 4a can be tightened via the tightening portion 4b. In the figure, 5c is a washer.

  As shown in FIG. 3 (b), the reinforcing bar clamp portion 4a of the connecting fitting 3 has a substantially elliptical shape along the outer shape of the reinforcing bars 1a and 1b in the overlapping portion 2, and both end portions of the reinforcing bar clamp portion 4a. The tightening portion 4b that is continuous with the rebar is opened to the left and right with the bolt 5a and the nut 5b removed, so that the rebar clamp portion 4a can be fitted to the overlapping portion 2 of the rebars 1a and 1b. It is. In addition, it is desirable to reduce the manufacturing cost by manufacturing the reinforcing bar clamp part 4a and the tightening part 4b of the connecting metal 3 by sheet-metal processing a belt-like metal plate. Further, the reinforcing bar clamp part 4a and the tightening part 4b of the connecting metal 3 are subjected to rust prevention treatment, and the concrete cover thickness at the connecting metal part 3 is equal to the concrete cover at the reinforcing bars 1a and 1b. It is preferable to reduce the influence of being thinner than the thickness.

  In the case where the one reinforcing bar 1a and the other reinforcing bar 1b are connected at both end portions of the overlapping portion 2 using the connecting fitting 3 having such a configuration, first, the bolt 5a is tightened from the tightening portion 4b of the connecting fitting 3. With the nut 5b removed, the reinforcing bar clamp 4a of the coupling fitting 3 is fitted into one end of the overlapping portion 2 as shown in FIG. At this time, the tightening portion 4b of the connection fitting 3 is directed to the opposite side (concrete cover thickness side) of the concrete as viewed from the overlapped portion 2 so that the connection fitting 3 has a portion. It is made to reduce that the concrete cover thickness of this becomes thin compared with the concrete cover thickness in the reinforcing bars 1a and 1b. Next, the bolt 5a is inserted into a bolt insertion hole (not shown) provided in the tightening portion 4b of the connection fitting 3, and the nut 5b is screwed into the bolt 5a as shown in FIG. To. When the nut 5b is screwed into the bolt 5a and tightened, the reinforcing bar clamp part 4a is drawn inward via the tightening part 4b, and a tightening force is applied to the one reinforcing bar 1a and the other reinforcing bar 1b. . Thereby, said one reinforcing bar 1a and said other reinforcing bar 1b can be connected by the one end part of the said overlap part 2. As shown in FIG. Similarly, after fitting the reinforcing bar clamp part 4a of the connecting fitting 3 to the other end part of the overlapped part 2, the reinforcing bar clamp part 4a is tightened with the bolt 5a and the nut 5b via the tightening part 4b. 4 (a), the one reinforcing bar 1a and the other reinforcing bar 1b are connected to each other at the other end portion of the overlapping portion 2. At this time, the central flat plate portion of the reinforcing bar clamp portion 4a is not deformed along the concave portion 6 formed between the connected reinforcing bars 1a and 1b, and holds the concave portion 6. .

  In this way, if the reinforcing bars 1a and 1b are connected using the connecting metal fitting 3 having the above-described configuration, the reinforcing bars 1a and 1b arranged with their end portions overlapped with each other for the required length can be easily connected. . Moreover, it can restrain that each rebar 1a, 1b moves away from the diameter direction of this rebar 1a, 1b, and it can prevent that the rebar 1a and 1b open. Furthermore, since the reinforcing bar clamp portion 4a in the connecting fitting 3 has a shape as described above along the outer shape of each reinforcing bar 1a, 1b in the overlapping portion 2, the concrete cover thickness at the connecting fitting 3 portion is the reinforcing bar 1a, It can be reduced compared with the case where a mechanical joint is used that it becomes thinner than the concrete cover thickness in 1b part. Therefore, the reinforcing bars 1a and 1b can be arranged outside the concrete structure as compared with the case where a mechanical joint is used, and the shear strength and buckling strength of the concrete structure can be improved.

  Next, as shown in FIGS. 4 (a) and (b), the one reinforcing bar 1a and the other reinforcing bar 1b are connected to each other at both ends of the overlapping portion 2, and then the connected reinforcing bars 1a and 1b are connected to each other. As shown in FIGS. 5 (a) and 5 (b), the paste-like adhesive 7 is filled over the entire length of the recess 6 formed between the two. The adhesive 7 is made of a mortar, epoxy, acrylic or urethane adhesive, and the adhesive 7 is subjected to compressive shear by applying a tensile force generated in the longitudinal direction of the reinforcing bars 1a and 1b. It is designed to be received as power. In addition, when it is difficult to fill the adhesive 6 in the concave portion 6 inside the attachment portion of the connecting fitting 3 in the concave portion 6, the adhesive 7 is filled using a gun-type adhesive filling device. Good. Alternatively, a hole may be formed in the central portion of the reinforcing bar clamp portion 4a of the connection fitting 3, and the adhesive 7 may be filled from the hole.

  Thereafter, the adhesive 7 is cured to connect the one reinforcing bar 1a and the other reinforcing bar 1b, and then concrete is placed around the reinforcing bars 1a and 1b.

  As described above, according to the reinforcing bar connecting method in the embodiment shown in FIGS. 1 to 5 (A) and (B), one end of one reinforcing bar 1a to be connected and the other end of the other reinforcing bar 1b are connected. Overlaying the required length, the step of forming the overlapping portion 2 at one end of the one reinforcing bar 1a and the other end of the other reinforcing bar 1b, and the shape along the outer shape of the overlapping portion 2 Reinforcing bars 1a and 1b are used by using a connecting metal fitting 3 in which a fastening part 4b as an end continuous to the reinforcing bar clamp part 4a is fastened on the side opposite to the side where the cover thickness of concrete is viewed from the overlapped part 2. And a step of filling the concave portion 6 formed between the connected reinforcing bars 1a and 1b with a paste-like adhesive 7 over the entire length, A step of curing the adhesive 7, The coupling of the reinforcing bars 1a and 1b arranged in a section between superposed required length it is possible to easily perform the filling state of the adhesive 7 can be easily confirmed. Therefore, the reinforcing bars 1a and 1b can be connected efficiently.

  Further, since the concave portion 6 formed between the connected reinforcing bars 1a and 1b is filled with the adhesive 7, the tensile force generated in the longitudinal direction of the reinforcing bars 1a and 1b is compressed on the adhesive 7. It can be received as a shearing force. Therefore, the length of overlapping the ends of the reinforcing bars 1a and 1b can be shortened as compared with the case of using a lap joint. Therefore, in precast concrete construction, it is possible to reduce the time required for placing concrete to fill the space between the precast concrete members. Further, the structure of the precast concrete member can be made advantageous.

  Furthermore, since the reinforcing bars 1a and 1b are connected at both end portions of the overlapping portion 2, the stirrup and the stirrup can be arranged avoiding the connecting portion of the overlapping portion 2. Therefore, it is possible to prevent the winding diameter of the stirrup or the stirrup from becoming small.

  Next, FIGS. 6 to 9 (a) and (b) show other embodiments of the present invention. First, as shown in FIG. 7, two reinforcing bars 8a and 8b to be connected are arranged on the end faces. Arranged in series so as to face each other, the connecting member 9 having such a length as to straddle the ends of the two reinforcing bars 8a, 8b is arranged so as to overlap the ends of the reinforcing bars 8a, 8b. The overlapping portions 10a and 10b are formed at the ends of the reinforcing bars 8a and 8b. Next, as shown in FIGS. 8A and 8B, the rebars 8a and 8b and the connecting member 9 are connected to each other by connecting metal fittings 3 at both ends of the overlapping portions 10a and 10b. The rebars 8a and 8b are connected via 9. Then, the paste-like adhesive 12 is filled in the recess 11 formed between the connected connecting member 9 and the reinforcing bars 8a and 8b. Thereafter, the adhesive 12 is cured to connect the reinforcing bars 8a and 8b. Thereafter, concrete is placed around the connected reinforcing bars 8a and 8b.

  More specifically, first, as shown in FIG. 7, one reinforcing bar 8a and the other reinforcing bar 8b connected to the one reinforcing bar 8a are arranged in series, and the outer peripheral surface of one end of the one reinforcing bar 8a and the other reinforcing bar 8a are arranged. The required length is shorter than the length of the connecting member 9 such as a reinforcing bar having the same diameter as that of the reinforcing bars 8a and 8b on the outer peripheral surface of the other end of the reinforcing bar 8b, and the reinforcing bars defined in the building construction standard specifications or the like in the lap joint. For example, the connecting member 9 is made to be in contact with the longitudinal direction of the reinforcing bars 8a and 8b so that the ends of the reinforcing bars defined in the building construction standard specification and the like are brought into contact with each other for a length of 10% to 80%. The overlapping portion 10a is formed at one end of the one reinforcing bar 8a, and the overlapping portion 10b is formed at the other end of the other reinforcing bar 8b.

  Next, the one reinforcing bar 8a and the connecting member 9, and the other reinforcing bar 8b and the connecting member 9 are connected to both ends of the overlapping portions 10a and 10b as shown in FIGS. In a portion, the connecting metal fitting 3 having the same structure as that shown in FIGS. 3 (a) and 3 (b) is fastened and connected in the same manner as shown in FIGS. 4 (a) and (b). To do. At this time, the connection fitting 3 is arranged such that the tightening portion 4b of the connection fitting 3 faces the side opposite to the concrete cover thickness side (the concrete anti-coverage thickness side) as viewed from the overlapping portions 10a and 10b. It is made to reduce that the concrete cover thickness in the part becomes thinner than the concrete cover thickness in the reinforcing bars 8a and 8b.

  Next, as shown in FIGS. 8 (a) and 8 (b), the reinforcing bars 8a and 8b and the connecting member 9 are connected to each other at both end portions of the overlapping portions 10a and 10b, respectively, and then connected. A recess 11 formed between the connecting member 9 and the reinforcing bars 8a and 8b is filled with a paste-like adhesive 12 over the entire length as shown in FIGS. Thereby, the adhesive 12 is caused to receive a tensile force generated in the longitudinal direction of the reinforcing bars 8a and 8b as a compressive shear force. The adhesive 12 may be a mortar, epoxy, acrylic or urethane adhesive as in the embodiment shown in FIGS. 1 to 5 (a) and (b). Good.

  Thereafter, the adhesive 12 is cured to connect the one reinforcing bar 8a and the other reinforcing bar 8b, and then concrete is placed around the reinforcing bars 8a and 8b.

  As described above, according to the reinforcing bar connecting method in the embodiment shown in FIGS. 6 to 9 (A) and (B), one reinforcing bar 8a and the other reinforcing bar 8b to be connected are arranged in series, The connecting member 9 is arranged so as to overlap the required length so as to extend from one end of the other reinforcing bar 8a to the other end of the other reinforcing bar 8b, and one end of the one reinforcing bar 8a and the other end of the other reinforcing bar 8b In addition, the connecting member is formed by connecting the reinforcing bars 8a and 8b and the connecting member 9 with the connecting metal fittings 3 at both ends of the overlapping portions 10a and 10b, respectively, by forming the overlapping portions 10a and 10b. 9, the step of connecting the rebars 8 a and 8 b via the connection member 9, and the recess 11 formed between the connected connecting member 9 and the rebars 8 a and 8 b. 12 and filling the adhesive 12 And curing, so are to have a, it is possible to perform the coupling of reinforcing bars 8a and 8b arranged in series easily, the filling state of the adhesive 12 can be easily confirmed. Therefore, the reinforcing bars 8a and 8b can be connected efficiently.

  Further, since the adhesive 12 is filled in the recess 11 formed between the connected connecting member 9 and the reinforcing bars 8a and 8b, the longitudinal direction of the reinforcing bars 8a and 8b is added to the adhesive 12. The tensile force generated in can be received as a compressive shear force. Therefore, the length of overlapping the connecting member 9 on each of the reinforcing bars 8a and 8b can be shortened as compared with the case where a lap joint is used. Therefore, as in the embodiment shown in FIGS. 1 to 5 (A) and (B), in precast concrete construction, it is possible to shorten the time required for concrete placing to fill the space between the precast concrete members. In addition, the structure of the precast concrete member can be made advantageous.

  Further, since the reinforcing bars 8a and 8b and the connecting member 9 are connected at both end portions of the overlapping portions 10a and 10b, the stirrups and the stirrups should be arranged avoiding the connecting portions of the overlapping portions. Can do. Therefore, it is possible to prevent the winding diameter of the stirrup or the stirrup from becoming small.

  In addition, this invention is not limited to each above-mentioned embodiment, For example, you may make it use the binding band made from stainless steel for the connection metal fitting 3 used for each said embodiment, for example.

  In each of the above-described embodiments, the case where concrete is placed around each of the connected reinforcing bars 1a, 1b, 8a, and 8b has been described. However, the present invention is not limited to this. For example, mortar is placed. You may do it.

  Further, in the embodiment shown in FIGS. 6 to 9 (A) and (B), the connecting member 9 is disposed so as to overlap one end of one reinforcing bar 8a and the other end of the other reinforcing bar 8b. However, the present invention is not limited to this. For example, as shown in FIGS. 10A and 10B, both ends of one end of one reinforcing bar 8a and the other end of the other reinforcing bar 8b are provided. In addition, the connecting member 9 having a cross-sectional area approximately half that of the reinforcing bars 8a and 8b may be arranged in an overlapping manner. In this case, as shown in FIG. 10 (b), the reinforcing bar clamp portion 4a in the connecting fitting 3 is formed with an arc along the outer shapes of the reinforcing bars 8a and 8b and the connecting members 9 (the outer shapes of the overlapping portions 10a and 10b). It is preferable to use a shape having a flat part and a flat part.

  Furthermore, the connecting member 9 in the embodiment shown in FIGS. 6 to 9 (A) and (B) and FIGS. 10 (A) and (B) is not limited to a reinforcing bar, and for example, a flat plate or the like is used. You may do it.

  Of course, various modifications can be made without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1a, 1b Reinforcing bar 2 Stacking part 3 Connecting metal fitting 4a Reinforcing bar clamp part 4b Tightening part 6 Recess 7 Adhesive 8a, 8b Reinforcing bar 9 Connecting member 10a, 10b Overlapping part 11 Recess 12 Adhesive

Claims (6)

A step of overlapping the ends of the reinforcing bars to be connected to form an overlapped portion;
Connecting each of the above reinforcing bars at both end portions of the overlapped portion with a connecting bracket ;
Characterized in that it has the steps of filling the adhesive in a portion other than the portion portion and the connecting fitting the connecting fitting which definitive in a recess formed between the reinforcing bars and the coupling is disposed is located Reinforcing bar connection method. A step of superimposing a connecting member on an end of the reinforcing bar to be connected in series to form an overlapping part on the end of each reinforcing bar; and
Connecting each of the reinforcing bars via the connecting member by connecting the connecting member and the reinforcing bars with connecting fittings at both end portions of the overlapping portions;
A step of filling the adhesive in a portion other than the portion linked the coupling member and portion and the connecting fitting the connecting fitting definitive in a recess formed between the respective reinforcing bars are arranged is disposed, Reinforcing bar connection method characterized by comprising: The connecting bracket uses a connecting bracket including a reinforcing bar clamp portion having a shape along the outer shape of the overlapped portion, and a tightening portion continuous with the reinforcing bar clamp portion.
In the step of connecting the reinforcing bars, the tightening portion of the connecting fitting is tightened on the side opposite to the side where the concrete cover thickness is reached when placing concrete around the reinforcing bars when viewed from the overlapped portion. The reinforcing bar connecting method according to claim 1 or 2. A connecting fitting which concatenates the respective rebar end portions of the overlapping portion formed by overlapping the ends of the reinforcing bars to be connected,
And adhesive part and the connecting fitting which definitive in the recess the connecting fitting is arranged is filled in a portion other than the portion that is disposed to be formed between the reinforcing bars are connected by the connecting fitting, the rebar joint and having a configuration Ru equipped. A connecting member arranged so as to overlap the end of each reinforcing bar to be connected in series to form an overlapping part at the end of each reinforcing bar;
A connecting fitting which is consolidated and the connecting member and the respective reinforcing bars in both end portions of each overlapping portion,
Filled in portions other than the portion definitive in the recess the connecting bracket being formed portion and the connecting metal fitting is placed is disposed between the connecting member and the respective reinforcing bars are connected by the connecting fitting rebar joint, wherein an adhesive, to have a configuration in which Ru equipped was. The connecting bracket is
Reinforcing bar clamp part that has a shape along the outer shape of the overlapping part,
Ri Ah provided continuously to the iron muscle clamping portion, and when viewed from the overlapped portion, to clamp the opposite side of the side where the cover thickness of the concrete when concrete is around each reinforcing bar to be the connection The reinforcing bar joint according to claim 4 or 5, wherein the tightening portion is provided.

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