JP3262664B2 - Brace joint - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bundled joint, and more particularly, to a structure of a joint of a bundled bar used as a reinforcing bar in, for example, RC construction or SRC construction, that is, reinforced concrete construction and steel reinforced concrete construction.

[0002]

2. Description of the Related Art It is well known that a large number of reinforcing bars are arranged one by one at predetermined intervals in RC structures.
In general, the spacing between one reinforcing bar and another adjacent reinforcing bar is 1.7D when the diameter of the reinforcing bar is D (differences between the centers of the reinforcing bars are 2. 7D).

[0003] As described above, since the reinforcing steel used for the RC construction must be arranged at a predetermined interval, R
When arranging a large number of reinforcing bars in order to increase the strength of the C-structure, there is a problem that the cross-sectional area of the reinforced concrete structure is increased by securing the interval between the reinforcing bars as described above. However, if you want to use thicker rebar than standard products to avoid this, you have to use custom products, which greatly increases the cost and causes the construction cost to rise .

[0004] Therefore, proposals have already been made for bundling a plurality of conventionally used rebars and using them as one brace. The proposed brace is basically one in which a plurality of conventional reinforcing bars are arranged around a spacer or the like and bundled at a predetermined interval from each other. It is characterized in that it is arranged in a portion and fixed and bundled by welding or the like.

[0005]

However, since such a reinforcing bar is formed by fixing the spacer and each reinforcing bar by welding or the like, there has been a problem that the bundling operation is troublesome. In addition, the addition of the bundles was conventionally very troublesome and time-consuming. Therefore, it has been desired to develop a device that has a function of bundling the rebars while being a joint between the bundles, and that can easily perform such operations.

SUMMARY OF THE INVENTION An object of the present invention is to solve such a conventional problem. When conventional conventional-sized reinforcing bars are used in a bundle, the spacing between the reinforcing bars constituting the reinforcing bars is maintained. It is another object of the present invention to provide a tie-up joint that can easily add tie-ups together.

[0007]

SUMMARY OF THE INVENTION The present invention relates to a bundled joint, and has the following structure to solve the above-mentioned technical problem. That is, the bundled joint 10 of the present invention
Are roughly formed into a long and thin rod-shaped core portion 11, a plurality of winding holding blades 12, a stopper 13 provided substantially at an intermediate portion of the core portion 11 in the longitudinal direction, and a tip portion of the winding holding blade 12. And a spiral streak 15 engaged with each of the grooves 14 formed at the tip of the winding holding wing 12. These configurations will be specifically described individually. (Elongated bar-shaped core portion) The elongated bar-shaped core portion 11 can be made of metal or the like, and its length is about twice as long as the end portion required when rebars are added (two spliced bars are joined together). Is preferred. Also, this core part 11
The cross-sectional shape of is not particularly limited, and when the reinforcing bars 17 are arranged at equal intervals around the periphery thereof, it is highly preferable that the seating surface 18 and the like are formed such that each reinforcing bar 17 can stably contact the peripheral surface of the core portion 11. . (Wound holding blades) The plurality of winding holding blades 12 are installed at equal intervals in the circumferential direction on the outer periphery of the core portion 11, and each of them extends radially outward from this outer peripheral surface. It is convenient in terms of manufacturing that each winding holding blade 12 is formed integrally with the core portion 11. However, a separate winding holding blade 12 may be mounted on the outer peripheral surface of the core portion 11 or may be fixed and fixed by a separate fixing means. (Stopper) The stopper 13 is composed of a projecting portion provided on the outer peripheral surface of the core portion 11 between the winding holding blades 12 at a substantially intermediate portion in the longitudinal direction of the core portion 11. This stopper 13 is also preferably formed integrally with the core portion 11. The function of the stopper 11 is to ensure a predetermined joint allowance (margin) in each reinforcing bar 17. (Groove at the Tip of Winding Holding Blade) A large number of grooves 14 are formed at the tip of the winding holding blade 12.
Is formed as follows. That is, the groove 14 formed at the tip of each winding holding blade 12 is
When a coil-shaped wire is wound around the outer circumference of the plurality of winding-holding wings 12 around the center thereof, the coil-shaped wire is formed on the end face of each winding-holding wing 12 at a position where the wire comes into contact. (Spiral streaks) The spiral streaks 15 are arranged as the coiled wire. Therefore, the spiral streaks 15 are formed in each groove 1 formed at the tip of the winding holding blade 12.
4 does not come off easily.

A bundled joint 1 comprising such components
0 denotes a core portion 11, a winding holding wing 12, and a spiral line 15
Thus, a plurality of sector-shaped space portions 16 are defined in a tunnel shape. Reinforcing bars 1 forming a bundle 19 in each of the tunnel-like spaces 16 from both ends thereof
Insert 7 ends. In other words, the reinforcing bars 17 are bundled by inserting the reinforcing bars 17 into the respective tunnel-shaped spaces 16, and also function as joints between the reinforcing bars 19.

[0009]

According to the bundled joint of the present invention, a plurality of sector-shaped space portions 16 are formed in a tunnel shape by the core portion 11, the winding holding blades 12, and the spiral streaks 15. One end of each of the reinforcing bars 17 constituting the bundle 19 is inserted into each of the tunnel-shaped spaces 16 from one end thereof. In other words, the rebars are bundled by inserting the rebars 17 into the tunnel-shaped space portions 16.

[0010] Next, the ends of the reinforcing bars constituting the other bundles 19 are inserted into the above-mentioned tunnel-like space portion 16 of the bundle reinforcement 10 from the other end side. Thereby, the rebar can be bundled also at the other end side.
The bundled joint 10 also serves to add two bundled bars arranged on both sides at the same time.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of the present invention. FIGS. 1 and 2 show a bundled joint 10 according to an embodiment of the present invention. The bundling joint 10 according to this embodiment is roughly divided into an elongated rod-shaped core portion 11 having a basically rectangular cross section, four winding holding blades 12, and a substantially intermediate portion in the longitudinal direction of the core portion 11. A plurality of grooves 14 formed at the tip of each winding holding blade 12 and a spiral streak 15 engaged with each of the grooves 14 are provided.

The core portion 11 can be made of metal or the like, and the length thereof is preferably about twice as long as the end portion required for adding a reinforcing bar (to add two reinforcing bars by abutting each other). Further, regarding the cross-sectional shape of the core portion 11,
In this embodiment, the basic shape is a rectangular shape. However, the present invention is not limited to this shape, and may be various shapes such as a circle.

The four winding holding blades 12 are provided on the outer peripheral surface corresponding to each side of the core portion 11 having a rectangular cross section, and extend radially outward from the outer peripheral surface. Therefore, the winding holding blades 12 are formed at equal angular intervals in the circumferential direction. Each winding holding blade 12 is provided with a core 11
Is formed integrally with the bundled metal fitting 10
Is convenient in the production of However, for example, a mounting groove such as a dovetail groove may be formed on the outer peripheral surface of the core 11, and a separate winding holding blade 12 may be mounted on the mounting groove, or may be fixed and mounted separately by a fixing means. Good.

A number of grooves 14 are provided at the tip of each winding holding blade 12, and these grooves 14 are formed as follows. That is, the spiral streaks 15 are wound around the outer circumference of the four winding holding blades 12 around the core portion 11 over the entire length. At this time, a groove portion 14 is formed at the position of the tip end surface of each winding holding blade 12 with which the spiral streaks 15 come into contact so as to allow the passage portion of the spiral streaks 15 to be engaged.

When the spiral streaks 15 are wound around the winding holding wings 12, the spiral streaks 15 are compressed to increase the diameter of the spiral streaks 15, and the spiral streaks 15 are sheathed around the winding holding wings in this state. . Thereafter, when the compression of the spiral muscle 15 is released and the both ends thereof are simultaneously pulled, the spiral muscle 15 is sequentially inserted into the groove 1 formed on the tip end surface of each winding holding blade 12.
4 is engaged. In this way, the installation of the spiral muscle 15 can be performed really easily.

A bundled joint 1 comprising such components
0 denotes a core portion 11, a winding holding wing 12, and a spiral line 15
Thus, the four sector-shaped space portions 16 are defined in a tunnel shape. The ends of the reinforcing bars 17 are inserted into the respective tunnel-like spaces 16 from both ends.
In other words, by inserting each reinforcing bar 17 into each of the tunnel-shaped spaces 16, the reinforcing bars 17 are bound on both sides thereof, and at the same time function as a joint between the binding bars.

Each of the reinforcing bars 1 is provided in each of the tunnel-like spaces 16 described above.
At the time of insertion, the corners of the rectangular core portion 11 are chamfered into a curved surface so as to form a seating surface 18 so that each reinforcing bar comes into stable contact with the peripheral surface of the core portion 11. By stopping the chamfering for forming the seat portion 18 at a substantially middle portion in the longitudinal direction of the core portion 11, a projecting portion, that is, a stopper 13 projecting outward from the seating surface 18 can be formed at that portion. .

The stopper 13 is provided in a tunnel-like space 16.
When the reinforcing bar 17 is inserted along the seating surface 18 of the core 11 from both sides, the end surfaces of the reinforcing bars 17 on both sides abut on the stopper 13 at the longitudinally intermediate portion of the core 11 and are positioned.
Thereby, the insertion length of each reinforcing bar 17 inserted into the tunnel-shaped space portion 16 from both sides becomes constant, and a predetermined joint allowance (margin) in each reinforcing bar 17 can be ensured.

As shown in FIG. 3, the brace 19 bound by the above-described brace joint 10 has a spacer 20 disposed at an appropriate position in the length direction thereof, and its periphery is bound by a wire 21. Is preferred. The spacer 20 can be formed of various materials such as plastic and metal, for example, and can be formed of a plate member having the same front shape as the cross-sectional shape of the core portion 11 of the bundled joint 10.

The use of such a spacer 20 makes it possible to maintain a constant spacing between the reinforcing bars even at the intermediate portion of the binding bar 19. Although various shapes of such a spacer are conceivable, an example thereof may be one in which a reinforcing bar insertion hole 22b is formed in each arm 22a of a substantially cross-shaped plate material as shown in FIG.

The spacer 22 is mounted on four reinforcing bars at the same time by inserting the ends of the reinforcing bars 17 into the respective insertion holes 22b of the spacer 22 from one end side of the reinforcing bars. Bundling. Each of the plurality of spacers 22 sequentially mounted in this manner is positioned at an appropriate position. As a method of this positioning, the spacer 2
By moving a wire or the like around one reinforcing bar to form a hump before and / or after the rod 2 does not move from a predetermined position along the reinforcing bar, the moving can be easily prevented.

The bundled joint 10 according to the above-described embodiment includes:
As is apparent from FIG. 2, four rebars 17 were bundled, but it is not always necessary to use four rebars.
As shown in (3), three rebars 17 may be bundled using three tunnel-like spaces 16, or of course two may be used.

Further, the bundled reinforcing bar constructed and extended as described above can be used as a reinforcing bar such as a column or a beam, whereby the strength of the RC or SRC column or beam can be significantly increased. .

[0024]

As described above, according to the bundled bar joint of the present invention, a predetermined number of reinforcing bars are formed in a tunnel-shaped space having a fan-shaped cross section formed by a core portion, a winding holding blade, and a spiral bar. A plurality of reinforcing bars can be easily bundled at a predetermined interval by being inserted into the portion from one end side, and can also function as a joint between the bundled bars by being inserted from the other end side.

[Brief description of the drawings]

FIG. 1 is a front view showing a bundled joint according to an embodiment of the present invention.

FIG. 2 is a sectional view of the bundled joint of the embodiment taken along line 2-2 in FIG.

FIG. 3 is a perspective view showing a state in which a spacer is arranged in the middle of the bundling stitch bundled by the bundling stitch joint of the embodiment and bound.

FIG. 4 is a cross-sectional view showing a spacer having another shape for binding each reinforcing bar in the middle of a bundle;

FIG. 5 is a sectional view similar to FIG. 2, showing a case where three reinforcing bars are bundled by the bundled joint of the embodiment shown in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Bundle joint 11 Core part 12 Winding holding wing 13 Stopper 14 Groove part 15 Spiral stripe 16 Tunnel-like space part 17 Reinforcing steel 18 Seat surface 19 Bundle reinforcement 20 Spacer 21 Winding wire 22 Spacer

Continuation of front page (56) References JP-A-7-207839 (JP, A) JP-A-5-44301 (JP, A) JP-A-5-321118 (JP, A) JP-A-6-51393 (JP) , U) (58) Fields investigated (Int. Cl. ⁷ , DB name) E04C 5/00-5/20

Claims (1)

(57) [Claims] An elongated rod-shaped core portion, a plurality of winding holding blades extending radially outward from an outer peripheral surface of the core portion, and a plurality of winding holding blades substantially intermediate in a longitudinal direction of the core portion. A stopper formed of a protruding portion provided on the outer peripheral surface of the core portion, and a number of grooves formed at the tip of the winding holding blade, and a number of grooves formed at the tip of the winding holding blade are provided. A groove formed to correspond to an imaginary spiral line extending over the entire length of the core portion, and being wound around the outer circumference of the plurality of winding holding wings around the core portion over the entire length thereof; A spiral ridge engaged with each groove formed at the tip of the retaining wing, and a plurality of tunnel-shaped spaces defined by the core, the winding retaining wing, and the spiral ridge. It is characterized by inserting and joining the ends of the reinforcing bars And bundling joints.