JP2009161902A - Reinforcement joint implement - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable the joining of reinforcements even if the one reinforcement has already been assembled or arranged, when the reinforcements are joined together. <P>SOLUTION: This reinforcement joint implement 1 comprises a tubular steel body 4 in an open cross-section, which is formed in such a curved shape as to be capable of embracing the two reinforcements 2 and 3 as joining objects in a juxtaposed state, and a wedge member 5 which is press-fitted between the two reinforcements 2 and 3. The tubular steel body 4 is formed in such a curved shape that one edge 6 overlaps the other edge 7. A wedge insertion hole 8 is formed at the one edge 6 of the tubular steel body 4; a wedge insertion hole 9 is formed at the other edge 7 in such a manner as to be concentric with the wedge insertion hole 8; a wedge insertion hole 10 is formed in a position to face the one edge 6 and the other edge 7, in such a manner as to be concentric with the wedge insertion holes 8 and 9; and the wedge member 5 is inserted through the wedge insertion holes 8, 9 and 10, and press-fitted between the two reinforcements 2 and 3. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a reinforcing bar joint applied when connecting reinforcing bars to each other, in particular, reinforcing bars that have already been arranged.

  Reinforcing bars, which are the main components of reinforced concrete structures (RC structures) and steel-framed reinforced concrete structures (SRC structures), are processed to a predetermined length in consideration of workability when placing the reinforcing bars, so the reinforcing bars are joined together on site. The work to do becomes indispensable.

  There are various types of methods for joining the reinforcing bars, such as lap joints, mechanical joints, gas pressure welding joints, and the like, which are properly used depending on the quality required for the structure, the working conditions, the diameter of the reinforcing bars used, and the like.

  Here, each of the joining methods described above has advantages and disadvantages, and lap joints can easily join rebars by using adhesion to concrete, but in order to overlap two rebars, if the rebar diameter increases Indeed, it becomes difficult to secure a space between the reinforcing bars and a length of the overlap. In addition, it is necessary to manage items such as the insertion length of the reinforcing bar to the coupler and the tightening torque for the mechanical joint, and the gas pressure joint requires qualification for work.

  For this reason, reinforcing bar joining methods that can easily join reinforcing bars and do not need to secure the overlap length have been developed separately. Among them, in the method of joining two reinforcing bars that are parallel to each other, It can be applied only to reinforcing bars with a fixed interval, and lacks versatility regarding the pitch of reinforcing bars (see Patent Document 1). Moreover, in the joining method using a U-shaped cylinder, sufficient joint strength cannot be ensured (see Patent Documents 2 and 3).

Japanese Patent No. 3197079 JP-A-5-156721 Japanese Utility Model Publication No. 3-047052 Japanese Utility Model Publication No. 58-32498 Japanese Utility Model Publication No. 58-53880

  Under such circumstances, a joining tool composed of a steel cylinder having an oval cross section and a wedge member has been developed, and according to such a joining tool, the two reinforcing bar ends are respectively reversed in the cylinder. Then, the reinforcing bars can be joined to each other by driving a wedge member between the two reinforcing bars through a wedge insertion hole provided in the cylindrical body (see Patent Document 4 and Patent Document 5).

  However, when the reinforcing bars have already been arranged and assembled, the reinforcing bars cannot be inserted into the steel cylinder, and the joining reinforcing bars cannot be joined. . For example, in the case where the reinforcing steel bars to be joined are already assembled as reinforcing bar rods, it is impossible to join another reinforcing bar to the reinforcing bars constituting the reinforcing bar rods with the joints disclosed in Patent Documents 4 and 5.

  The present invention has been made in consideration of the above-described circumstances, and when joining reinforcing bars, a reinforcing bar joint that can be joined even if one of the reinforcing bars has already been assembled or the arrangement of the reinforcing bars has been completed. The purpose is to provide ingredients.

  In order to achieve the above-mentioned object, a reinforcing bar joint according to the present invention, as described in claim 1, is capable of embedding two reinforcing bars to be joined in a parallel state, and one edge portion is the other. The first wedge insertion hole is formed in the one edge portion, and the second wedge insertion is made in the other edge portion so as to be concentric with the first wedge insertion hole. A third wedge insertion hole is formed at a position opposite to the one edge and the other edge so that a hole is formed and is concentric with the first wedge insertion hole and the second wedge insertion hole. A steel tubular body having an open cross section, and a wedge member that is inserted through the first reed insertion hole, the second wedge insertion hole, and the third wedge insertion hole and press-fitted between the two reinforcing bars. It is composed of

  Further, as described in claim 2, the reinforcing bar joint according to the present invention has a U-shaped cross section and a pair of wedge insertion holes formed concentrically on the opposing flat plate portions and can be fitted to each other. When the pair of semi-cylindrical members are fitted to each other so as to embrace the semi-cylindrical member and two rebars to be joined in a parallel state, two sets formed respectively on the semi-cylindrical members And a wedge member that is inserted into the wedge insertion hole and press-fitted between the two reinforcing bars.

  In order to join a reinforcing bar using a conventional reinforcing bar joint, two reinforcing bars to be joined must be inserted into the cylinder before the wedge member is driven. For this reason, when the assembly and the bar arrangement have already been completed, the reinforcing bars other than the joining target may be in the way and the joining target reinforcing bars cannot be inserted into the cylinder. For example, even if you try to join the bottom bar of the beam to the main bar of the column, if the main bar is already assembled as part of the reinforcing bar rod, the hoop bar will interfere and the main bar cannot be inserted into the cylinder. .

  The present applicant makes the cylindrical body an open cross section instead of a closed cross section, attaches the cylindrical body so as to embrace the two rebars arranged in parallel, and drives the wedge member in that state. Focusing on the fact that it can be joined to rebars that have already been reinforced, R & D was conducted.

  However, in the conventional reinforcing bar joint tool, when the wedge member is driven, the two reinforcing bars receive a large reaction force from the inner surface of the cylindrical body, and the reaction force becomes a restraining force together with the pressure input from the wedge member. On the other hand, in the case of a cylindrical body having an open cross section, even when a wedge member is driven, the cylindrical body opens or escapes, so that a sufficient reaction force is not generated.

  Therefore, the present applicant, by suppressing the opening and escaping of the cylindrical body due to the open cross section with a wedge member, causes a sufficient reaction force to act on the reinforcing bar from the inner surface of the cylindrical body, thus Similarly, the new knowledge that two rebars can be joined firmly was acquired.

  That is, in the reinforcing bar joint according to the first aspect of the invention, first, a steel tubular body is attached to the reinforcing bars so as to embrace the two reinforcing bars to be joined in a parallel state. When installing, make use of the flexibility of the steel tubular body to create a gap between one edge and the other edge, or widen the gap, from which the reinforcing bar is connected to the steel tubular body. Put in the hollow space.

  For example, assuming that the two reinforcing bars are the bottom bar of the beam and the main bar of the column, and the main bar of the column is a part of the reinforcing bar rod, first, using the flexibility of the steel tubular body A gap is created between one edge and the other edge, or the gap is widened, and the main bar of the column is inserted into the hollow space of the steel tubular body through the gap. At this stage, since only the main bar of the column has been inserted into the hollow space of the steel tubular body, the end of the lower bar of the beam is continuously inserted into the remaining hollow space, thereby making the steel Hold the two rebars in parallel with the cylindrical body.

  Next, the wedge member is inserted into the first wedge insertion hole, the second wedge insertion hole, and the third wedge insertion hole, and the wedge member is press-fitted between the two reinforcing bars.

  In this case, the pressure input of the wedge member is transmitted to the steel tubular body through the two reinforcing bars, and the steel tubular body is pushed and opened. However, the opening of the steel tubular body is the wedge member. Is restrained by. Therefore, the steel tubular body causes a reaction force to act on the two reinforcing bars on the inner surface thereof, and thus the two reinforcing bars are firmly joined by the steel tubular body and the wedge member.

  The overlap between one edge and the other edge does not mean only the overlap when they are in contact with each other, but rather, it is more It is easy to widen the interval during installation and is highly convenient.

  In the reinforcing bar joint according to the second invention, first, a pair of semi-cylindrical members are fitted into each other so as to embrace the two reinforcing bars to be joined in a parallel state.

  For example, assuming that the two reinforcing bars are the bottom bar of the beam and the main bar of the column, and the main bar of the column is a part of the reinforcing bar, first add the end of the lower bar of the beam to the main bar of the column. In this state, a pair of semi-cylindrical members are fitted to each other so as to embrace the two reinforcing bars.

  Next, each semi-cylindrical member is relatively positioned so that the wedge insertion holes formed in each semi-cylindrical member are concentric, and then the wedge members are inserted into the two pairs of wedge insertion holes. At the same time, a wedge member is press-fitted between the two reinforcing bars.

  In this case, the pressure input of the wedge member is transmitted to the pair of semi-cylindrical members via the two reinforcing bars, and the semi-cylindrical members are allowed to escape in the direction in which they are separated from each other. The escape of the member is restrained by a wedge member. Therefore, each semi-cylindrical member causes a reaction force to act on the two reinforcing bars on the inner surface thereof, and thus the two reinforcing bars are firmly joined by the pair of semi-cylindrical members and the wedge member.

  Embodiments of a reinforcing bar joint 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)

  FIG. 1 is a view showing a reinforcing bar joint according to the present embodiment. As can be seen in the figure, the reinforcing bar joint 1 according to the present embodiment is a steel tubular body 4 that is curved so that the two reinforcing bars 2 and 3 to be joined can be held in a parallel state. And a wedge member 5 press-fitted between the two reinforcing bars 2 and 3.

  Unlike the conventional closed-section cylinder, the steel cylinder 4 has an open-section cylinder, and is curved so that one edge 6 overlaps the other edge 7. Such a steel tubular body 4 can be formed, for example, by bending a rectangular steel plate. A predetermined gap δ is provided between the one edge 6 and the other edge 7, and the gap δ can be widened to attach to the assembled rebar.

  A wedge insertion hole 8 as a first wedge insertion hole is formed on one edge 6 of the steel tubular body 4, and the other edge 7 is concentric with the wedge insertion hole 8. A wedge insertion hole 9 is formed as a second wedge insertion hole. Further, a wedge insertion hole 10 as a third wedge insertion hole is formed at a position opposite to the one edge 6 and the other edge 7 so as to be concentric with the wedge insertion hole 8 and the wedge insertion hole 9. It is.

  The wedge member 5 is configured to be inserted into the wedge insertion hole 8, the wedge insertion hole 9, and the wedge insertion hole 10 and press-fitted between the two reinforcing bars 2 and 3.

  FIG. 2 is a side view showing a state in which the upper bar 12 and the lower bar 13 of the beam 11 are joined to the main bar 15 of the column 14 using the reinforcing bar joint 1 according to the present embodiment. Is pre-assembled as a part of the reinforcing bar 16.

  In order to join the bottom bar 13 of the beam 11 to the main bar 15 of the column 14, first, as shown in FIG. The gap between the edges 7 is expanded, and the main bar 15 of the column 14 is inserted into the hollow space of the steel tubular body 4 through the gap.

  At this stage, since only the main reinforcement 15 of the column 14 is inserted into the hollow space of the steel tubular body 4, the beam 11 continues to the remaining hollow space as shown in FIG. By inserting the end of the lower reinforcing bar 13, the two steel bars 13 and 15 are held in parallel by the steel tubular body 4.

  Next, the wedge member 5 is inserted into the wedge insertion hole 8, the wedge insertion hole 9 and the wedge insertion hole 10, and the wedge member is press-fitted between the two reinforcing bars 13 and 15.

  In this case, the pressure input of the wedge member 5 is transmitted to the steel tubular body 4 through the two reinforcing bars 13 and 15 and tries to push open the steel tubular body. The opening of the body 4 is restrained by the wedge member 15. Therefore, the steel tubular body 4 causes a reaction force to act on the two reinforcing bars 13 and 15 on the inner surface thereof, and thus the two reinforcing bars 13 and 15 are separated by the steel tubular body 4 and the wedge member 5. It is firmly joined. The top bar 12 of the beam 11 can also be joined to the main bar 15 of the column 14 in the same procedure as described above.

  As described above, according to the reinforcing bar joint 1 according to the present embodiment, the steel tubular body 4 having an open cross section is curved so that the two reinforcing bars can be held in parallel in the hollow space. In addition, a wedge insertion hole 8 is formed at one edge 6 of the steel tubular body 4, a wedge insertion hole 9 is formed at the other edge 7, and a wedge insertion hole 10 is formed at the opposite position. Since the wedge member 5 is inserted into them, when the wedge member 5 is press-fitted, the steel tubular body 4 may exert a reaction force on the two reinforcing bars without causing deformation in the opening direction. It becomes possible, and it becomes possible to join two rebars firmly like the rebar joint tool using the conventional closed section type cylinder.

  Moreover, according to the reinforcing bar joint 1 according to the present embodiment, since the steel tubular body 4 having an open cross section is used, the main bar 15 of the column 14 that has already been assembled as a part of the reinforcing bar rod 16. However, the hoop of the column 14 does not become an obstacle, and as described in FIG. 3, the gap between one edge 6 and the other edge 7 is widened so that the main bar 15 is a steel tubular body. By being inserted into the hollow space 4, it becomes possible to firmly join the lower bar 13 and the upper bar 12 of the beam 11.

  In the present embodiment, the case where the upper bar 12 and the lower bar 13 of the beam 11 are joined to the main bar 15 constituting the reinforcing bar 16 of the column 14 has been taken up, but the application part of the reinforcing bar joint 1 is not limited. The present invention can be applied to any case where another reinforcing bar is joined to a reinforcing bar that has already been arranged or assembled.

  FIG. 4 is a side view showing a state in which the lower end bar 43 of the floor slab 42 is joined to the stirrup bar 41 of the beam 11. In the case of a conventional reinforcing bar joint, the stirrup bar 41 that has been arranged cannot be inserted into the cylinder, and therefore the lower end bar 43 of the floor slab 42 is joined to the arranged stirrup bar 41. However, if the reinforcing bar joint 1 according to the present embodiment is used, both can be joined in the same procedure as described above.

  In the present embodiment, the example in which the wedge insertion hole 8, the wedge insertion hole 9, and the wedge insertion hole 10 are formed in the steel tubular body 4 one by one has been described. However, the number of wedge insertion holes is one. The present invention is not limited, and a plurality of wedge insertion holes 8, wedge insertion holes 9, and wedge insertion holes 10 may be formed.

(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. 5 is a view showing a reinforcing bar joint 51 according to the present embodiment. As can be seen in the figure, the reinforcing bar joint 51 according to the present embodiment includes a pair of semi-cylindrical members 54a and 54b for holding two reinforcing bars 2 and 3 to be joined in parallel, and two reinforcing bars. The wedge member 5 is press-fitted between 2 and 3.

  The semi-cylindrical member 54a has a U-shaped cross section, and wedge plate insertion holes 55a and 55a are formed concentrically in the opposing flat plate portions 56a and 56a. Similarly, a U-shaped cross section is formed, and wedge insertion holes 55b and 55b are formed concentrically on the opposing flat plate portions 56b and 56b.

  Although the pair of semi-cylindrical members 54a and 54b are members having the same configuration, they can be fitted to each other by being symmetrically arranged and shifted by the thickness of the flat plate portion 56a or the flat plate portion 56b. .

  When the pair of semi-cylindrical members 54a and 54b are fitted to each other so as to embrace the two rebars 2 and 3 in parallel, the wedge members 5 are inserted into the wedges formed in the semi-cylindrical members 54a and 54b, respectively. It is inserted into the holes 55a and 55a and the wedge insertion holes 55b and 55b, and is press-fitted between the two reinforcing bars 2 and 3.

  FIG. 6 shows a procedure for joining the bottom bar 13 of the beam 11 to the main bar 15 of the column 14 using the reinforcing bar joint 51 according to the present embodiment.

  In order to join the lower bar 13 of the beam 11 to the main bar 15 of the column 14 using the reinforcing bar joint 51, first, the two reinforcing bars 13 and 15 to be joined are held in parallel to form a pair of semi-cylindrical shapes. The members 54a and 54b are fitted into each other.

  Next, each semi-cylindrical member 54a, 54b is formed such that the wedge insertion holes 55a, 55a formed in the semi-cylindrical member 54a and the wedge insertion holes 55b, 55b formed in the semi-cylindrical member 54b are concentric. Next, the wedge member 5 is inserted into the wedge insertion holes 55a and 55a and the wedge insertion holes 55b and 55b, and the wedge member 5 is press-fitted between the two reinforcing bars 13 and 15.

  In this way, the pressure input of the wedge member 5 is transmitted to the pair of semi-cylindrical members 54a and 54b via the two reinforcing bars 13 and 15, and the semi-cylindrical members 54a and 54b are separated from each other in a direction away from each other. The semi-cylindrical members 54 a and 54 b are restrained by the wedge member 5. Therefore, each semi-cylindrical member 54a, 54b applies a reaction force to the two reinforcing bars 13, 15 on the inner surface thereof, and thus the two reinforcing bars 13, 15 are paired with the pair of semi-cylindrical members 54a, 54a, 54a, 54b. 54b and the wedge member 5 are firmly joined.

  As described above, according to the reinforcing bar joint 51 according to the present embodiment, the semicylindrical members 54a and 54b can be fitted into each other so that the two reinforcing bars are held in parallel. And the wedge member 5 is inserted into the wedge insertion holes 55a and 55a and the wedge insertion holes 55b and 55b respectively formed in the semi-cylindrical members 54a and 54b. When the wedge member 5 is press-fitted, The semi-cylindrical members 54a and 54b can exert a reaction force on the two reinforcing bars without escaping in a direction away from each other. Like the conventional reinforcing bar joint using a closed-section cylindrical body, It becomes possible to join the reinforcing bars of the book firmly.

  Further, according to the reinforcing bar joint 51 according to the present embodiment, since the semi-cylindrical members 54a and 54b are used, the main reinforcing bar 15 of the column 14 that has already been assembled as a part of the reinforcing bar rod 16 is used. However, it is possible to firmly join the lower bar 13 of the beam 11 as described with reference to FIG.

  In the present embodiment, the case where the upper bar 12 and the lower bar 13 of the beam 11 are joined to the main bar 15 constituting the reinforcing bar 16 of the column 14 has been taken up. However, the application part of the bar joint 51 is not limited. The present invention can be applied to any case where another reinforcing bar is joined to a reinforcing bar that has already been arranged or assembled.

  For example, as described in the first embodiment, it is possible to employ the reinforcing bar joint 51 even when the lower end bar 43 of the floor slab 42 is joined to the stirrup bar 41 of the beam 11.

  Further, in the present embodiment, the pair of semi-cylindrical members are configured by the semi-cylindrical members 54a and 54b having the same shape and the same dimensions, but the semi-cylindrical members according to the present invention are not limited to such a configuration. Different shapes and dimensions may be used. For example, a configuration in which one semicylindrical member as a whole is fitted into the other semicylindrical member can be employed.

  In the present embodiment, an example in which one set of wedge insertion holes 55a and 55a is formed in the semi-cylindrical member 54a and one set of wedge insertion holes 55b and 55b is formed in the semi-cylindrical member 54b has been described. The number of holes is not limited to one, and several pairs of wedge insertion holes 55a and 55a and wedge insertion holes 55b and 55b may be provided.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure of the rebar joint tool which concerns on 1st Embodiment, (a) is the whole figure which showed a part in cross section, (b) is the rear view (viewed from the AA line direction) of the steel cylindrical body 4 (Arrow view), (c) is also a side view (Arrow view seen from the direction of line BB). The side view which showed a mode that the upper bar 12 and the lower bar 13 of the beam 11 were each joined to the main bar | burr 15 of the column 14 using the reinforcing bar joint tool 1. FIG. The perspective view which showed the joining procedure similarly. The side view which showed a mode that the lower end reinforcement 43 of the floor slab 42 was joined to the stirrup reinforcement 41 of the beam 11. FIG. It is the figure of the reinforcing bar joint which concerns on 2nd Embodiment, (a) is the whole figure which showed a part in cross section, (b) is a rear view (seen from a DD line direction) of semi-cylindrical members 54a and 54b (C) is a side view (arrow view seen from the direction of line EE). The perspective view which showed the procedure which joins the bottom reinforcement 13 of the beam 11 to the main reinforcement 15 of the pillar 14 using the reinforcing bar joint tool 51. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,51 Reinforcing bar joint tool 2, 3 Reinforcing bar 4 Steel cylindrical body 5 Wedge member 6 One edge 7 The other edge 8 Wedge insertion hole (first wedge insertion hole)
9 Wedge insertion hole (second wedge insertion hole)
10 Wedge insertion hole (third wedge insertion hole)
12 Top end of the beam (rebar)
13 Beam bottom reinforcement (rebar)
15 Column main reinforcement (rebar)
41 Stirrup muscle (rebar)
43 Lower floor reinforcement (rebar)
54a, 54b Semi-cylindrical members 55a, 55b Wedge insertion holes 56a, 56b Flat plate portion

Claims (2)

The two rebars to be joined can be held in parallel and curved so that one edge overlaps the other edge, and the first wedge insertion hole is formed in the one edge. A second wedge insertion hole is formed at the other edge so as to be concentric with the first wedge insertion hole, and is concentric with the first wedge insertion hole and the second wedge insertion hole. As described above, a steel tubular body having an open cross-section in which a third wedge insertion hole is formed at a position opposite to the one edge and the other edge, the first wedge insertion hole, and the second wedge A reinforcing bar joint tool comprising an insertion hole and a wedge member that is inserted through the third wedge insertion hole and press-fitted between the two reinforcing bars. A pair of semi-cylindrical members having a U-shaped cross section and having wedge insertion holes formed concentrically on the opposing flat plate portions and capable of being fitted to each other, and two rebars to be joined in parallel When the pair of semi-cylindrical members are fitted to each other so as to embrace, the wedge members are inserted between the two pairs of wedge insertion holes respectively formed in the semi-cylindrical members and press-fitted between the two reinforcing bars. Reinforcing bar joint tool characterized by comprising.

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