JP5565925B2 - Reinforcing bar joint structure - Google Patents

Description

  The present invention relates to a reinforcing bar joint structure applied when joining main bars.

  Reinforcing bars are usually processed to a predetermined length in consideration of the workability at the time of bar arrangement, so on-site joining work is indispensable, but as a means of joining such reinforcing bars, the cross section is oblong. There is known a method of joining two reinforcing bars through a joining tool made of a steel tubular body and a wedge member.

  According to such a connector, by inserting the two reinforcing bar ends from the opposite directions into the cylindrical body, and then driving the wedge member between the two reinforcing bars from the wedge insertion hole provided in the cylindrical body, Reinforcing bars can be joined to each other (see Patent Document 1 and Non-Patent Document 1).

Japanese Utility Model Publication No. 58-32498 International Publication No. 2008/018161 Pamphlet ERICO International Corporation, [Search August 2, 2006], Internet <URL: http://www.erico.com/products/QuickWedge.asp>

  However, in the case of the above-described connector, the two rebars are not aligned in a straight line but are displaced in the direction perpendicular to the material axis due to the fact that the two rebars are inserted alternately into the oval cylindrical body. Since the two reinforcing bars are joined together, if a tensile force acts on these reinforcing bars, a phenomenon occurs in which the cylinder rotates due to a shift in the direction perpendicular to the material axis.

  The rotation of the cylinder may cause a situation such as loosening of engagement between the reinforcing bar and the wedge member and a decrease in bonding strength due to generation of a bending moment accompanying the rotation of the cylinder.

  In addition, it has been found that as the rotation of the cylinder increases, the extra length protruding from the cylinder jumps up, causing a new problem of pushing the concrete from the inside and causing the concrete to peel off or crack.

  The present applicant has succeeded in developing a reinforcing bar joint that can prevent the rotation of the cylinder and increase the joining force (Patent Document 2), and according to such a joint, the rotation of the cylinder is prevented. However, the tensile strength of the reinforcing bars can be fully exerted, but the cost increases due to the increase in the number of parts, so the main application range is structures and parts that require high quality, and it is economical. There was room for separate development of joints.

  The present invention has been made in consideration of the above-described circumstances, and provides a reinforcing bar joint structure capable of preventing the excess length of the reinforcing bar from jumping up and causing concrete peeling and cracking. Objective.

In order to achieve the above object, the joint structure of the reinforcing bars according to the present invention is such that the two reinforcing bars are arranged so as to overlap each other within a predetermined length from their tips as described in claim 1. Are inserted into both ends of the cylindrical body having an oval cross-sectional shape, and wedge insertion holes formed in a pair of opposing flat plate-shaped wall parts among the wall parts constituting the cylindrical body. By inserting a wedge member and press-fitting between the two reinforcing bars, the two reinforcing bars are joined together to form at least a part of the main reinforcing bar of the reinforced concrete member, and a predetermined reinforcing bar embedded in the reinforced concrete member A deformation restraining member capable of taking a reaction force from the reaction force reinforcing bar as a reaction force reinforcing bar and transmitting the reaction force to the extra length of one of the two reinforcing bars, In the deformation restraining member, the extra length portion is the tube. A joint structure of a reinforcing bar in accordance with the rotational and is capable to suppress the deformation to be spaced from the other rebar, among predetermined rebar embedded in the reinforced concrete member, the one rebar The main reinforcement located at a position away from the surplus length portion is the reaction force reinforcement .

In the reinforcing bar joining structure according to the present invention, the reaction reinforcing bar and the extra length portion of the one reinforcing bar are annularly surrounded by the deformation restraining member .

  In the reinforcing bar joint structure according to the present invention, the deformation restraining member is a shear reinforcing bar.

In the reinforcing bar joining structure according to the present invention, the locking portion provided at one end of the deformation restraining member is locked to the reaction force reinforcing bar, and the locking portion provided at the other end is connected to the one reinforcing bar. Locked to the extra length .

  In the reinforcing bar joint structure according to the present invention, the deformation restraining member is a stop bar.

In addition, the reinforcing bar joint structure according to the present invention has a cross-sectional shape as described in claim 6 so that the two reinforcing bars are arranged in a predetermined length range from their tips. Are inserted from both end openings of a cylindrical body having an oval shape, and a wedge member is inserted into a wedge insertion hole formed in each of a pair of opposed flat plate-like wall portions among the wall portions constituting the cylindrical body. By press-fitting between the two reinforcing bars, the two reinforcing bars are joined together to form at least a part of the main reinforcing bar of the reinforced concrete member, and a predetermined reinforcing bar embedded in the reinforced concrete member is used as the reaction reinforcing bar. A deformation restraining member capable of taking a reaction force from the reaction force reinforcing bar and transmitting the reaction force to an extra length of one of the two reinforcing bars, the deformation restraining member comprising: , The extra length part is accompanied by the rotation of the cylinder It is the joining structure of the reinforcing bar which can suppress the deformation which is going to be separated from the reinforcing bar of the reinforcing bar, and is adjacent to the surplus length part of the one reinforcing bar among the predetermined reinforcing bars embedded in the reinforcing steel concrete member. The other reinforcing bar that matches is the reaction force reinforcing bar , and the extra length part of the one reinforcing bar and the other reinforcing bar are connected to each other on each opening side of the cylindrical body so that their parallel state is maintained. The deformation restraining member is constituted by a pair of holding members .
In the reinforcing bar joint structure according to the present invention, the pair of holding members are made of steel rings.

  In the reinforcing bar joint structure according to the present invention, the two reinforcing bars are respectively inserted from the opening at both ends of the cylindrical body, and in this state, the wedge member is inserted into the wedge insertion hole and press-fitted between the two reinforcing bars. When two reinforcing bars are joined together to form at least a part of the main reinforcing bar of a reinforced concrete member, a predetermined reinforcing bar embedded in the reinforced concrete member is used as a reactive reinforcing bar, and the reaction force is taken from the reactive reinforcing bar. The deformation restraining member capable of transmitting to the surplus length portion of the reinforcing bar is provided, and the deformation restraining member suppresses the deformation that the surplus length portion tends to be separated from the other rebar as the cylindrical body rotates. Be able to.

  Conventionally, when a tensile force is applied to two reinforcing bars, the cylindrical body rotates due to the displacement of the material axes thereof, and as the rotation of the cylindrical body increases, the surplus of one reinforcing bar Although the long part has deformed to jump away from the other reinforcing bar, in the reinforcing bar joint structure according to the present invention, the reaction force taken from the reactive force bar acts on the extra length part via the deformation restraining member. For this reason, the jumping of the surplus length part is significantly suppressed, and the rotational deformation of the cylinder is also suppressed with the curbing of the surplus length part.

  Thus, even if a large tensile force acts on the two reinforcing bars, the extra length of one reinforcing bar prevents the spring from being deformed so as to be separated from the other reinforcing bar, and the concrete cracks caused by the jumping are prevented. It becomes possible to prevent peeling.

  An extra length part refers to the part which protrudes from a cylinder among each reinforcing bar.

  Typical examples of reinforced concrete members include columns and beams, but the present invention can be applied to any part, and the present invention can be applied not only to rectangular and circular cross sections but also to cross sections of any shape. Is possible.

  The reaction reinforcing bar, that is, the reinforcing bar for taking the reaction force acting on the extra length part to suppress the extra length part of one of the reinforcing bars from jumping up, can be appropriately selected from arbitrary reinforcing bars embedded in the reinforced concrete member. Although it is good, in order to obtain a larger and more stable reaction force, it is desirable to take the reaction force from the main muscle.

  The reaction force acting on the extra length of one of the reinforcing bars via the deformation restraining member is taken from the reaction force reinforcing bar. At that time, the reaction force is combined with the reaction force reinforcing bar and the concrete and the deformation restraining member. Adhesion of water contributes not a little.

  In the case where the reaction bar is a main reinforcing bar, it does not matter whether the main reinforcing bar is a reinforcing bar with a joint or a reinforcing bar without a joint, and the type of the joint is arbitrary even if it has a joint. In addition, like the one of the reinforcing bars to which the surplus length portion belongs, it may be joined using the cylindrical body and the wedge member, or may be joined in another form.

  When the reaction bar is the main bar and the main bar is formed by joining two bars using the cylindrical body and the wedge member, the relationship between one bar and the reaction bar is reversed as described later. Thus, the present invention can be applied, and in such a case, the respective deformation restraining members can be shared.

The deformation restraining member takes a reaction force from the reaction force reinforcing bar as a reaction force reinforcing bar that is embedded in the reinforced concrete member, and transmits this reaction force to the extra length of one reinforcing bar. When the main bar located at a position away from the surplus length part is a reaction force reinforcing bar (first example) and when the other reinforcing bar adjacent to the surplus length part of one reinforcing bar is the reaction force reinforcing bar (second example) ) .

  As a first example, among the predetermined reinforcing bars embedded in the reinforced concrete member, a main reinforcing bar located at a position away from the extra length of one reinforcing bar, that is, a main reinforcing bar different from the main reinforcing bar composed of the two reinforcing bars described above. In addition to the reaction reinforcing bar, the main reinforcing bar that is the reaction reinforcing bar and the main reinforcing bar that is composed of the two reinforcing bars can be configured by surrounding the extra length of one reinforcing bar in a ring shape with a deformation restraining member.

  Such a configuration includes at least the following specific configurations.

   i) In the case where the reinforced concrete member is a beam having a rectangular cross section, the main bars are arranged at the four corners, and one of the upper bars is the main bar consisting of two bars. Case where one upper bar becomes a reaction bar.

  ii) Similarly, the case where one of the bottom bars is the main bar consisting of two reinforcing bars and the other bottom bar is the reaction reinforcing bar.

  iii) Similarly, a case where one of the upper bars is a main bar composed of two reinforcing bars and the remaining three bars are reaction force reinforcing bars.

  In the case of iii), the shear reinforcement can be used as a deformation restraining member.

  Further, among the predetermined reinforcing bars embedded in the reinforced concrete member, the main reinforcing bar located at a position away from the extra length of one reinforcing bar is used as a reaction reinforcing bar, and the deformation restraining member is provided at one end thereof. Is locked to the reaction force reinforcing bar, and the locking part provided at the other end can be locked to the extra length part of one reinforcing bar of the main reinforcing bars composed of two reinforcing bars.

  Such a configuration includes at least the following specific configurations.

   iv) When the reinforced concrete member is a beam with a rectangular cross section, the main bars are arranged at the four corners, and one of the upper bars becomes the main bar made of two bars, and the other upper bar Is a reaction force rebar

  v) Similarly, one of the lower bars is the main bar consisting of two bars, and the other lower bar is the reaction bar.

  In the specific configuration described above, the width stop bars can be used as the deformation restraining member.

  As a second example, among the predetermined reinforcing bars embedded in the reinforced concrete member, the other reinforcing bar adjacent to the extra length of one reinforcing bar is used as a reaction reinforcing bar, and the deformation restraining member includes two reinforcing bars. The structure comprised by the holding member hold | maintained in a parallel state can be mentioned.

  Such a configuration suppresses the jumping of the extra length of one of the main reinforcing bars composed of two reinforcing bars by the reaction force from the other reinforcing bar, and unlike the above-described first example, Transmission is limited to the reinforcing bars that constitute the main bars, and no force is transmitted between the main bars.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a reinforcing bar joint structure according to the present invention will be described below with reference to the accompanying drawings. Note that components that are substantially the same as those of the prior art are assigned the same reference numerals, and descriptions thereof are omitted.

(First embodiment)

  1A and 1B are views showing a joint structure of reinforcing bars according to this embodiment, where FIG. 1A is an overall perspective view and FIG. 1B is a cross-sectional view. As can be seen from these drawings, the reinforcing bar joining structure 1 according to the present embodiment joins the two reinforcing bars 5a and 5b to each other by using the cylindrical body 2 and the wedge member 4, and the corner portion of the reinforced concrete member 11. The main bars 15, 16, 17, and 18 are embedded in four locations, respectively, and these main bars 15, 16, 17, and 18 are annularly surrounded by shear reinforcing bars 14 as deformation restraining members.

  As can be seen in FIG. 2, the cylindrical body 2 has an oval cross-sectional shape and a pair of semi-cylindrical wall portions 7 and 7 disposed so that the curved inner surfaces face each other, and the pair of semi-cylindrical wall portions. Of the two reinforcing bars 5a and 5b, the reinforcing bar 5a as one reinforcing bar and the reinforcing bar 5b as the other reinforcing bar from the tip of the two reinforcing bars 5a and 5b. It can be inserted through the openings 6a and 6b at both ends in a state of being overlapped by a predetermined length range.

  The pair of flat wall portions 8 and 8 of the cylindrical body 2 are formed with wedge insertion holes 9 and 9 through which the wedge member 4 is inserted, and the wedge member 4 is inserted into the wedge insertion holes to reinforce the reinforcing bars 5a and By press-fitting between 5b, the reinforcing bars 5a and 5b can be joined to each other.

  In the reinforcing bar joint structure 1 according to the present embodiment, the shear reinforcing bars 14 as deformation restraining members are disposed so as to surround the main bars 15 and 16 as upper end bars and 17 and 18 as lower bar bars as a whole, By arranging the inner peripheral surface of the shear reinforcing bar 14 so as to abut on the peripheral surface of the extra length part 13 of the reinforcing bar 5 a protruding from the cylindrical body 2, the extra length part reinforces the reinforcing bar with the rotation of the cylindrical body 2. It is possible to suppress deformation that tends to be separated from 5b.

  That is, the shear reinforcing bar 14 takes a reaction force from the main bars 16, 17, 18 which are reaction force reinforcing bars, and among the reaction forces, a surplus part belonging to the main bar 15 By transmitting to 13, the extra length is prevented from deforming away from the reinforcing bar 5 b.

  Similarly, the shear reinforcing bar 14 takes a reaction force from the main bars 15, 17, and 18 which are reaction force reinforcing bars, and among the reaction forces, a surplus length belonging to the main bar 16 is generated from the reaction force consisting of the main muscle 15. By transmitting to the part 13, the extra length part suppresses the deformation | transformation which is going to separate from the reinforcing bar 5b.

  Further, the shear reinforcing bar 14 takes a reaction force from the main bars 15, 16, 18 that are reaction force reinforcing bars, and among the reaction forces, a surplus part that belongs to the main bar 17 By transmitting to 13, the extra length is prevented from deforming away from the reinforcing bar 5 b.

  Further, the shear reinforcing bar 14 takes a reaction force from the main bars 15, 16, and 17 which are reaction force reinforcing bars, and among the reaction forces, a surplus part belonging to the main bar 18 is applied to the reaction force composed of the main muscle 17. By transmitting to 13, the extra length is prevented from deforming away from the reinforcing bar 5 b.

  That is, the shear reinforcing bar 14 is shared as a deformation restraining member for suppressing the deformation of the extra length portions 13 belonging to the main bars 15, 16, 17, and 18.

  In addition, from the cylindrical body 2, the reinforcing bar 5b also protrudes to form an extra length portion similar to the extra length portion 13 of the reinforcing bar 5a, whereas the extra length portion 13 faces the surface of the reinforced concrete member 11, Since the surplus part of the reinforcing bar 5b is located on the center side of the reinforced concrete member 11, the degree is smaller than the jumping of the surplus part 13 of the reinforcing bar 5a. Therefore, since the crack and peeling of concrete resulting from the surging of the extra length portion 13 have a small direct influence, they are distinguished from each other.

  In order to construct the reinforcing bar joint structure 1 according to this embodiment, first, the reinforcing bar 5a is inserted from one opening 6a of the cylindrical body 2, and the end of the reinforcing bar 5b is inserted from the other opening 6b of the cylindrical body 2. To do. At this time, the reinforcing bars 5a and 5b are inserted into the cylindrical body 2 so that the reinforcing bars 5a and 5b are overlapped by a predetermined length from their tips.

  Next, the wedge member 4 is passed through the wedge insertion holes 9 and 9 and press-fitted. In press-fitting, a conventionally known wedge driving machine may be appropriately selected and used.

  FIG. 3 is a diagram showing the operation of the reinforcing bar joint structure 1 according to the present embodiment. When a bending moment is generated in the reinforced concrete member 11 and a tensile force is applied to the upper end bars 15 and 16 as shown in FIG. 3A, for example, the cylindrical body is caused by the displacement of the material axes of the reinforcing bars 5a and 5b. As 2 rotates, the extra length 13 of the reinforcing bar 5a tends to spring up in a direction away from the reinforcing bar 5b, as indicated by a dashed line in FIG.

  However, in the present embodiment, the peripheral surface of the extra length portion 13 of the reinforcing bar 5a protruding from the cylindrical body 2 so as to surround the main bars 15 and 16 as the upper end bars and 17 and 18 as the lower end bars in an annular shape as a whole. The shear reinforcement bars 14 are arranged so that the inner peripheral surface is in contact with the inner surface.

  For this reason, the deformation of the surplus length portion 13 that tends to be separated from the reinforcing bar 5 b as the cylindrical body 2 rotates is restrained by the shear reinforcing bar 14.

  As described above, according to the reinforcing bar joining structure 1 according to the present embodiment, the two reinforcing bars 5a and 5b are respectively inserted from the both end openings 6a and 6b of the cylindrical body 2, and in this state, the wedge insertion holes 9, 9, when the wedge member 4 is inserted and press-fitted between the two reinforcing bars 5 a and 5 b, the two reinforcing bars are joined together to form the main reinforcing bars 15 to 18 of the reinforced concrete member 11. Since the reaction force is taken from the main reinforcing bars 15 to 18 as reaction force reinforcing bars embedded in the wire and transmitted to the surplus length portion 13 via the shear reinforcement 14, the surplus length is accompanied with the rotation of the cylinder 2. It becomes possible to suppress the deformation | transformation which the part 13 tends to separate from the reinforcing bar 5b.

  Conventionally, when a large tensile force is applied to two reinforcing bars, as shown in FIG. 3 (b), the cylindrical body rotates greatly due to the displacement of the material axes, and one of them is There was a deformation in which the extra length of the steel bar jumped in the direction away from the other steel bar, which caused the concrete to peel off and crack.

  However, in the reinforcing bar joint structure 1 according to the present embodiment, since the reaction force taken from the reaction force reinforcing bar acts on the surplus length portion 13 via the shear reinforcing bar 14, the surging of the surplus length portion is shown in FIG. As shown in c), it is greatly suppressed, and accordingly, rotational deformation of the cylindrical body 2 is also suppressed.

  Thus, even if a large tensile force acts on the two reinforcing bars 5a and 5b, the excessive length portion 13 of one reinforcing bar 5a is prevented from being deformed so as to be separated from the other reinforcing bar 5b. It is possible to prevent cracking and peeling of the concrete due to the movement of the material.

  In this embodiment, the shear reinforcing bar 14 is used as the deformation restraining member. However, the deformation restraining member according to the present invention takes a reaction force from the reaction force reinforcing bar as a predetermined reinforcing bar embedded in the reinforced concrete member. If this can be transmitted to the extra length of one of the reinforcing bars, the configuration thereof is arbitrary, and instead of the shear reinforcing bar 14, for example, a steel strip member can be used.

  Further, in the present embodiment, an example in which one shear reinforcement bar 14 that is a deformation restraining member is provided is shown, but the present invention is not particularly limited thereto, and a plurality of shear reinforcement bars 14 may be used. In that case, the deformation | transformation which the surplus length part 13 tends to separate from the other reinforcing bar 5b will be restrained with the some shear reinforcement bar | burr 14, and the deformation | transformation can be suppressed reliably.

  Moreover, in this embodiment, although each main reinforcement 15-18 shared the shear reinforcement 14 which is a deformation | transformation restraint member, when the joining position of a reinforcing bar is not aligned in the main reinforcement 15-18, FIG. As shown, a shear reinforcement bar 14 may be provided for each main bar 15-18.

  Moreover, in this embodiment, in order to use the shear reinforcement bar 14 surrounding the main bars 15 to 18 in an annular shape, the reaction bar of the main bar 15 is set to the main bars 16, 17 and 18. Although the main reinforcing bar is a reaction force reinforcing bar, it is optional to select which reinforcing bar to be the reaction force reinforcing bar among the reinforcing bars in the reinforced concrete member. Instead of the above-described embodiment, as shown in FIG. The upper end bars 15 and 16 are annularly surrounded by the deformation restraining member 21 so that the inner peripheral surface of the member 21 is in contact with the peripheral surfaces of the extra length portions 13 belonging to the upper end bars 15 and 16. Similarly, the lower end bars 17 and 18 may be surrounded by the deformation restraining member 21 in an annular shape.

  In such a configuration, the reaction force reinforcement of the main muscle 15 is the main reinforcement 16, the reaction force reinforcement 15 of the main reinforcement 16, the reaction reinforcement of the main reinforcement 17 is the main reinforcement 18, and the reaction force reinforcement of the main reinforcement 18 is the main reinforcement 17.

  The deformation | transformation restraint member 21 can be comprised with a reinforcing bar or the strip | belt-shaped member made from steel.

  Further, instead of a configuration in which the main bars are annularly surrounded by the deformation restraining members, as shown in FIG. 6, the stop bars 31 as the deformation restraining members in which the locking portions 33, 33 are provided at both ends of the straight rod-shaped main body 32. Are arranged on the reinforced concrete member 11 in two upper and lower stages, and with respect to the upper stopper 31, one locking part 33 is locked to the main bar 15 and the other locking part is locked to the main bar 16. The lower stop bars 31 may be arranged such that one locking portion 33 is locked to the main bar 17 and the other locking portion is locked to the main bar 18. .

  In such a modification, the reaction force reinforcement of the main muscle 15 is the main muscle 16, the reaction force reinforcement of the main reinforcement 16 is the main reinforcement 15, the reaction force reinforcement of the main reinforcement 17 is the main reinforcement 18, and the reaction force reinforcement of the main reinforcement 18 is the main reinforcement 17. Deformation of the extra length portion 13 belonging to 15, 16, 17, 18 is suppressed.

(Second Embodiment)

  Next, a second embodiment will be described. Note that components that are substantially the same as those of the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

  FIG. 7 is an overall perspective view showing a joint structure of reinforcing bars according to the present embodiment. As can be seen from the drawing, the reinforcing bar joining structure 71 according to the present embodiment joins the two reinforcing bars 5a and 5b to each other by using the cylindrical body 2 and the wedge member 4, and the corner 4 of the reinforced concrete member 11. The main bars 15, 16, 17, and 18 are embedded in the respective locations, and holding members 72 as deformation restraining members are provided on these main bars, respectively.

  The holding member 72 connects the extra length portion 73a from the cylindrical body 2 of the reinforcing bar 5a and the reinforcing bar 5b adjacent to the extra length portion in a state where the two reinforcing bars 5a and 5b are inserted through the cylindrical body 2. At the same time, by connecting the extra length portion 73b of the reinforcing bar 5b from the cylindrical body 2 and the reinforcing bar 5a adjacent to the extra length portion, the reaction force reinforcing bar against the extra length portion 73a becomes the reinforcing bar 5b and the extra length portion 73b. The reaction force reinforcing bar is a reinforcing bar 5a, and restrains the movement of the extra length portion 73a and the reinforcing bar 5b and the extra length portion 73b and the reinforcing bar 5a in the separating direction.

  For example, as shown in FIG. 8, the holding member 72 is formed of an annular member in which the reinforcing bars 5 a and 5 b are held in a parallel state. For example, the holding member 72 may be formed of a steel ring having the same cross-sectional shape as the cylindrical body 2. it can.

  In constructing the reinforcing bar joining structure 71 according to the present embodiment, the reinforcing bars 5a and 5b are inserted through the cylindrical body 2 in the same manner as in the first embodiment. Insert 5b.

  Next, the wedge member 4 is passed through the wedge insertion holes 9 and 9 and press-fitted. In press-fitting, a conventionally known wedge driving machine may be appropriately selected and used. Next, the holding member 72 is fixed to the reinforcing bars 5a and 5b by bundling with other wires or other known fixing means.

  FIG. 9 is a view showing the operation of the reinforcing bar joining structure 71 according to the present embodiment. When a bending moment is generated in the reinforced concrete member 11 and, for example, a tensile force acts on the upper end reinforcement 15 as shown in FIG. 9A, the cylindrical body 2 is caused by the displacement of the material axes of the reinforcing bars 5a and 5b. As the cylinder 2 rotates, the extra length 73a of the reinforcing bar 5a tends to jump up in a direction away from the reinforcing bar 5b, as indicated by the alternate long and short dash line in FIG. As shown by the alternate long and short dash line in FIG. 1, the long portion 73 b tries to jump up in a direction away from the reinforcing bar 5 a, but in this embodiment, the jumping movement is restrained by the holding member 72.

  As described above, according to the reinforcing bar joining structure 71 according to this embodiment, the extra length portion 73a of the reinforcing bar 5a from the tubular body 2 and the reinforcing bar 5b adjacent to the extra length portion are mutually connected by the holding member 72. While connecting, the extra length part 73b from the cylinder 2 of the reinforcing bar 5b and the reinforcing bar 5a adjacent to the extra length part are mutually connected by the holding member 72, so the extra length part 73a and the reinforcing bar 5b, and As shown in FIG. 9B, the deformation in the separation direction between the extra length portion 73b and the reinforcing bar 5a is greatly suppressed, and accordingly, the rotational deformation of the cylindrical body 2 is also suppressed.

  Thus, even if a large tensile force acts on the two reinforcing bars 5a and 5b, the extra length 73a of the reinforcing bar 5a is separated from the other reinforcing bar 5b, or the extra length 73b of the reinforcing bar 5b tends to be separated from the reinforcing bar 5a. Therefore, it is possible to prevent the concrete from cracking and peeling off due to the jumping movement.

In the present embodiment, the example in which the extra length portions 73a and 73b of the reinforcing bars 5a and 5b are connected to the adjacent reinforcing bars 5a and 5b by the annular member as the holding member 72 is shown, but the embodiment is limited to a special annular member. Instead, for example, a C-shaped member or a U-shaped member may be used. In that case, the extra length parts 73a and 73b of the reinforcing bars 5a and 5b and the reinforcing bars 5a and 5b adjacent thereto are respectively engaged. Even in such a configuration, it is possible to prevent the surplus length portions 73a and 73b from jumping up and moving away from the reinforcing bars 5a and 5b.

It is a figure of the joining structure of the reinforcing bar concerning a 1st embodiment, (a) is a whole perspective view, and (b) is a sectional view. It is the figure which showed a mode that the reinforcing bars 5a and 5b were penetrated to the cylinder 2 in the joining structure 1 of a reinforcing bar, (a) is a top view, (b) is sectional drawing which follows an AA line. The top view explaining the effect | action in the joining structure of the reinforcing bar which concerns on 1st Embodiment. The whole perspective view which showed the joining structure of the reinforcing bar concerning a modification. Sectional drawing which showed another modification. Sectional drawing which similarly showed another modification. The whole perspective view showing the joining structure of the reinforcing bar concerning a 2nd embodiment. It is the figure which showed a mode that the reinforcing bars 5a and 5b were penetrated to the cylinder 2 in the joining structure 71 of a reinforcing bar, (a) is a top view, (b) is sectional drawing in alignment with a BB line, (c) is C Sectional drawing which follows the -C line. The top view explaining the effect | action in the joining structure of the reinforcing bar which concerns on 2nd Embodiment.

Explanation of symbols

1,71 Reinforcing bar joint structure 2 Cylindrical body 4 Wedge member 5a One reinforcing bar 5b The other reinforcing bar 6a, 6b Opening 9 Wedge insertion hole 11 Reinforced concrete member 13 Extra length 14 Shear reinforcement (deformation restraining member)
15, 16, 17, 18 Main reinforcement, reaction force reinforcement 21, 31 Deformation restraint member 72 Holding member (deformation restraint member)
73a, 73b extra length

Claims (7)

The two reinforcing bars are respectively inserted from both end openings of a cylindrical body having an oval cross-section so that the two reinforcing bars are overlapped with each other within a predetermined length range from the tip thereof, and the cylindrical body Of the two reinforcing bars by inserting a wedge member into a wedge insertion hole formed in each of a pair of opposing flat plate-like wall parts and press-fitting between the two reinforcing bars. The two reinforcing bars are bonded to each other to form at least a part of the main reinforcing bars of the reinforced concrete member, and the predetermined reinforcing bars embedded in the reinforced concrete members are used as the reaction reinforcing bars and the reaction force is taken from the reaction reinforcing bars. A deformation restraining member capable of being transmitted to the surplus length portion of one of the reinforcing bars, and the deformation restraining member is arranged such that the surplus length portion is separated from the other rebar as the cylindrical body rotates. So that deformation can be suppressed A bonding structure for reinforcing bars are I, among the predetermined rebar embedded in the concrete member, and characterized in that the main reinforcement that is located away from the elongated portion of the one reinforcing bar and said reaction force rebar Reinforcing bar joint structure. The reinforcing bar joint structure according to claim 1, wherein the reaction force reinforcing bar and the extra length of the one reinforcing bar are annularly surrounded by the deformation restraining member . The reinforcing bar joint structure according to claim 2, wherein the deformation restraining member is a shear reinforcing bar. The locking portion provided at one end of the deformation restraining member is locked to the reaction force reinforcing bar, and the locking portion provided at the other end is locked to an extra length portion of the one reinforcing bar. Reinforcing bar joint structure. The reinforcing bar joint structure according to claim 4, wherein the deformation restraining member is a stop bar. The two reinforcing bars are respectively inserted from both end openings of a cylindrical body having an oval cross-section so that the two reinforcing bars are overlapped with each other within a predetermined length range from the tip thereof, and the cylindrical body Of the two reinforcing bars by inserting a wedge member into a wedge insertion hole formed in each of a pair of opposing flat plate-like wall parts and press-fitting between the two reinforcing bars. The two reinforcing bars are bonded to each other to form at least a part of the main reinforcing bars of the reinforced concrete member, and the predetermined reinforcing bars embedded in the reinforced concrete members are used as the reaction reinforcing bars and the reaction force is taken from the reaction reinforcing bars. A deformation restraining member capable of being transmitted to the surplus length portion of one of the reinforcing bars, and the deformation restraining member is arranged such that the surplus length portion is separated from the other rebar as the cylindrical body rotates. So that deformation can be suppressed A joint structure rebar that Tsu, among predetermined rebar embedded in the reinforced concrete member, with the other reinforcing bar adjacent to the elongated portion of the one reinforcing bar and the reaction force reinforcing bar, said one of the The deformation restraining member is constituted by a pair of holding members that mutually connect the extra length portion of the reinforcing bar and the other reinforcing bar on each opening side of the cylindrical body so that their parallel state is maintained. Reinforcing bar joint structure. The reinforcing bar joint structure according to claim 6, wherein each of the pair of holding members is a steel ring.

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