JPH0791878B2 - Reinforcing bar joints - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a braided rebar joint advantageous for a braided rebar, particularly a rebar having a medium diameter or larger diameter and a very thick diameter.

(Prior Art) In the Japanese Laid-Open Patent Publication No. 63-289156, the present inventors have welded longitudinal and lateral reinforcing bars, and made the distance between the reinforcing bars of the joint part twice the rebar interval of the remaining general part. We proposed a joint of reticulated rebars in which the braided bars of one braided bar are superposed and connected so that they are positioned in the middle of adjacent rebars of the other braided bar.

(Problems to be solved by the invention) However, when the reticulated reinforcing bars (a) are jointed in both longitudinal and lateral directions at the same time, as shown in FIG. The position and the position of the reinforcing bar of the joint are largely separated, and when this is used as a reinforcing bar of the concrete skeleton, the cover thickness of the concrete changes greatly from place to place. In addition, the effectiveness of the rebar becomes shorter, which is a structural disadvantage.

(Means for Solving the Problem) The present invention has been proposed in order to solve such a problem, in which vertical and horizontal reinforcing bars are welded, and the bar arrangement intervals of the upper, lower, left and right end joint portions are set. , In the corners of the reticulated main body with double the rebar spacing of the rest of the general part, one of the two diagonal lines has a vertical reinforcing bar for the joint at the end of one of the diagonal lines , The first reticulated main body in which the reticulated main body is turned over and the first reticulated main body is turned upside down, in which the joint horizontal rebars are arranged in the middle of adjacent horizontal rebars at both ends of the other diagonal line. The second reticulated reinforcing bar, which is a vertical reinforcing bar and a horizontal reinforcing bar for joints, is arranged at the corresponding part of
1, so that the second braided bars overlap by the required length of the joint,
Displaced vertically and horizontally, at the joint positions in the vertical and horizontal directions, the first and second braided bars face each other in the vertical cross section of the horizontal joint, and back to back in the horizontal cross section of the vertical joint. The present invention relates to a reticulated joint, which is characterized by being spliced to

(Operation) As described above, the present invention is mainly composed of a braided main body in which vertical and horizontal reinforcing bars are welded and the bar arrangement intervals at the upper, lower, left and right ends are twice the bar arrangement intervals at the remaining general part. And, in the corner portion of the same main body, as described above, the first braided rebars arranged in the diagonally opposite direction for the joint vertical and horizontal rebars at the end verticals adjacent to each other and in the middle of the horizontal rebars, respectively. The inside of the braided muscle is turned over,
Use the second reticulated rebars with vertical and horizontal rebars for joints at the positions corresponding to the reticulated rebars, and shift both the first and second reticulated rebars in the vertical and horizontal directions by the required joint length. Since the first and second braided rebars face each other in the longitudinal section of the transverse joint at the longitudinal and transverse joint positions, respectively, and in the transverse section of the longitudinal joint, they are joined back to back, In the joint portion of the reticulated reinforcing bars, the reinforcing bars do not overlap with each other in multiple stages, thus the concrete cover thickness of the general portion other than the connecting portion becomes small, and in the case of double reinforcing bar, the effective reinforcement of the reinforcing bar becomes large.

Further, the vertical reinforcing bars for joints and the horizontal reinforcing bars for couplings are respectively provided at both ends of one diagonal line at the corners of the main part of the reticulated reinforcement in the corners of the main part of the reticulated reinforcement. By being arranged in the middle of the horizontal rebars in parallel with the adjacent vertical rebars, in the joint portion of the reticulated rebars, rebars that cannot be connected at the corners of each reticulated rebar do not occur, and It reliably connects the braided bars.

(Effect of the invention) As described above, according to the present invention, when connecting the reticulated reinforcing bars, the first and second reticulated reinforcing bars adjacent to each other vertically and horizontally are overlapped by the required joint length. The reticulated reinforcing bars are arranged so as to be displaced in the vertical direction and the horizontal direction, and the first and second reticulated reinforcing bars face each other at the vertical and horizontal joint positions in the horizontal joint longitudinal section, and the longitudinal joints are crossed in parallel. By connecting them back-to-back at the surface, the reinforcing bars do not overlap in multiple stages at the joint, the concrete cover thickness of the reinforcing bars in the general section is reduced, and in the case of double reinforcement, the effective reinforcement of the reinforcing bars is increased, Is advantageous.

Further, by the vertical and horizontal reinforcing bars for joints arranged in the corners of the reticulated reinforcing bars, rebars that are not connected to the joints of the reticulated reinforcing bars do not occur, and the reticulated reinforcing bars are securely spliced. Is.

(Examples) The present invention will be described below with reference to illustrated examples.

(A) is the 1st braided rebar, each longitudinal and lateral rebar (1) (2)
Are welded in a reticulated manner, and the rebar spacing of the joint part is twice (= 2l) the rebar spacing 1 of the remaining general part. A vertical reinforcing bar (3) for joints is arranged in the middle of the adjacent joint reinforcing bars (1) with a reinforcing bar pitch of 2l, and at the opposite ends of the other diagonal line, adjacent connecting transverse bars (2) with a reinforcing bar pitch of 2l. In the middle of (), the horizontal reinforcing bar (4) for the joint is distributed to the joint for the required length.
(See FIG. 2) (B) is a second braided rebar, which is a reticulated main body composed of vertical and horizontal rebars (1 ′) (2 ′) formed by turning the reticulated main body of the first braided rebar (A) inside out. The vertical reinforcing bars (3 ') for joints and the horizontal reinforcing bars (4') for joints are arranged at the bar pitches of the corner portions of the corners corresponding to the first reticulated bars (A).
The vertical rebar (1 ') and the horizontal rebar (2') of the joints adjacent to each other with 2l
The required length of the middle joint is the distribution muscle. (See FIG. 3) Then, as shown in FIG. 4, the first and second reticulated reinforcing bars (A) and (B) are adjacent to each other vertically and horizontally as shown in FIG.
The two reticulated reinforcing bars (A) and (B) are overlapped and spliced at the portions shown by the shaded portions (P) and (Q) by shifting them vertically and horizontally so that (B) overlaps by the required joint length.

Thus, as is clear from FIG. 1, the reticulated reinforcing bar (A)
In the longitudinal section of the transverse joint portion (P) of (B), the reticulated reinforcing bars (A) and (B) face each other, and the longitudinal and transverse reinforcing bars (1) and (2) of the reticulated reinforcing bars (A) and (B). , (1 ')
(2 ') are connected so that they are vertically and horizontally positioned at the same pitch l.

Further, the longitudinal joint portion (Q) of the reticulated reinforcing bars (A) and (B)
In the cross section of, the two reticulated rebars (A) and (B) are back-to-back, and the longitudinal and horizontal rebars (1) (2), (1 ') (2') of each reticulated rebar (A) (B) Are connected so that they are positioned vertically and horizontally at the same pitch l.

Since the illustrated embodiment is configured as described above, the reinforcing bars do not overlap in multiple stages at the joint portion of the reticulated reinforcing bars (A) and (B).

At this time, the longitudinal and transverse reinforcing bars for joints (3), (4) and (3 ') arranged at the corners of the reticulated reinforcing bars (A) and (B).
By (4 '), rebar that is not connected to the joint portion of the reticulated bars (A) and (B) is not generated, and the reticulated bars (A) and (B) are reliably connected. .

Further, in the conventional joint portion shown in FIG. 6, the minimum cover thickness t ₁ and the effective cover thickness t _{2 of the} main bar greatly differ, but in the case of the present invention shown in FIG. 7, the minimum cover thickness t ₁ and the main bar The difference from the cover thickness t ₃ is small, and the effective formation H in the case of double reinforcement is longer than the effective reinforcement h of the reinforcing bar in the conventional joint structure, which is structurally advantageous. Figure 8 shows reticulated reinforcement (B)
The joint part and the joint process of (B ') and (A) are shown,
The figure shows the joining portion and joining process of the braided reinforcing bars (B '), (B ") and (A).

[Brief description of drawings]

1 is a perspective view showing an embodiment of a reticulated reinforcing bar joint according to the present invention, and FIGS. 2 and 3 are substantially the same as FIG. 1, but FIG. 2 and FIG. First reticulated rebar as well as second
2 shows the reticulated rebar, its length and width, and each joint rebar. FIG. 4 is a front view showing a joint position of reticulated reinforcing bars, FIG. 5 is a perspective view showing a state in which conventional reticulated reinforcing bars are simultaneously connected vertically and horizontally, and FIG. 6 is a cross-sectional view taken along the line VI-VI of FIG. FIG. 7 is a vertical sectional view of a concrete structure in which reticulated reinforcing bars having joints of the present invention are reinforced, and is a vertical sectional view taken along the line VI-VI of FIG. 4, and FIGS. 8 and 9 are respectively FIG. 4 is a horizontal sectional view taken along the line VII-VII and a vertical sectional view taken along the line VIII-VIII, and FIGS. 8 and 9 together show the process of joining the braided reinforcing bars. (A) ... first braided rebar, (B) ... second braided rebar, (1) (1 ') ... vertical bar, (2) (2') ... horizontal bar, (3) (3) ′) …… Vertical bar for vertical bar joint, (4)
(4 ') ... Horizontal bar for vertical bar joint.

Claims (1)

[Claims] 1. A vertical and horizontal reinforcing bar is welded, and the vertical and horizontal end joints are arranged at a distance of 2 between the remaining general portions.
In the corners of the doubled reticulated line, one of the two diagonal lines has a vertical bar for joint in the end of one diagonal line, and a vertical bar for joint in the middle of the other bar of diagonal line. The first reticulated reinforcing bar, in which transverse reinforcing bars for joints are respectively arranged in the middle of the rebar, and the main part of the reticulated bar is turned over,
The second braided rebar consisting of vertical rebars and horizontal rebars for joints corresponding to the main reticulated bars of the They are arranged vertically and horizontally so that they overlap each other, and at the joint positions in the vertical and horizontal directions, the first and second reticulated reinforcing bars face each other in the vertical cross section of the horizontal joint, and the vertical joints are arranged in parallel. Reinforcing bar joint characterized by being joined back-to-back in the cross section of.