JPH06108588A - Jointer of reinforcing bar and connector therewith - Google Patents

Abstract

PURPOSE:To make it resistible enough even against tensile force by inserting each end of each pair of reinforcing bars in vertically parallel with each other, into both ends of a connector body, and making these reinforcing bars come into contact with an inner circumferential surface of the connector body, under pressure, by means of a wedge body fitted in from the outside. CONSTITUTION:Each of vertical two pieces of different diametral reinforcing bars 14, 14 is embedded in foundation concrete 13 to be connected with each other in advance, and they are projected from each connecting end in a vertical parallel manner. Next, a connector body 17 consisting of a hollow pipe is set up in a junction 16 lying between the concrete 13 and 13, and each end of these reinforcing bars 14 is inserted into both the ends of the connector body 17. In succession, two wedge bodies 18, 18 are fitted in space between the two vertical reinforcing bars 14 from two inserting holes 21, 21 installed at the side of the connector body 17, an outer circumferential part of each reinforcing bar 14 is strongly pressed under pressure to an inner circumferential surface 17a of the connector body 17, whereby the reinforcing bars 14 themselves are joined with each other. With this constitution, even in not only shearing force but tensile force, sufficient supporting force can be brought into full play.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforcing bar joining apparatus mainly used for joining precast concrete materials, and a joining tool used therefor.

[0002]

2. Description of the Related Art Conventionally, as a device for joining a pair of rebars facing each other to each other, as shown in FIG. 14, a rebar (2) is attached to a main body (1) of a hollow pipe from the opposite side. ) (2) is inserted and the connector body (1) is also used.
These rebars (2) are provided by the wedge body (3) that is inserted by being inserted into the rebars (2) (2) from the outside of the
There is one in which (2) is strongly pressed against the inner peripheral portion of the connector main body (1).

On the other hand, as a method of joining precast concrete to each other,

.. A nut with an anchor that is embedded flush with the end surface of the member in advance (also referred to as an insert. This may be replaced by a reinforcing bar having a thread cut in the center).
A method of joining metal plates that have been formed into various shapes via metal rods, metal plates, and bolts that are threaded on the outer periphery.

.. A method in which reinforcing bars protruding from the end face of a member or molded metal plates are connected to each other via long nuts, couplers, pins, and the like.

[0006] A method in which opposing reinforcing bars protruding from the end surface of a member are overlapped and welded on site.

There are three methods.

[0008]

However, as described above, one rebar (2) (2) is inserted into each end of the connector main body (1), and the wedge body ( In the structure in which 3) is driven, even if it is suitable for supporting the shearing force, the tensile force acting on the reinforcing bars (2) and (2) mainly acts on the wedge body (3) with respect to the tensile force. There is a drawback that a sufficient supporting force cannot be obtained because the force is such that it rotates.

Further, in the above-mentioned conventional method for joining precast concrete,

In the method of (1), the parts constituting the joint are variously complicated, and therefore, it takes time and labor for joining, and when joining with a bolt or a nut, a phase shift occurs due to the screw thread interval. , The accuracy is not constant. To solve this, the structure becomes complicated and the cost rises.

In the method of welding at the site, the performance strength is determined by the working conditions (work environment, working environment, skill level, etc.) of the worker.
It depends largely on the work posture), and there were variations.

That is, the present invention solves the drawbacks of the conventional rebar joining device, and in the rebar joining device using a pipe-shaped joining tool body and a wedge body, a joining device capable of withstanding a tensile force. And to provide a joint used for the same.

[0013]

In order to solve the above-mentioned problems, the first invention of this application is to insert a pair of parallel reinforcing bar ends into both ends of a connector main body made of a hollow pipe. The outer peripheral portion of the reinforcing bar is strongly pressed against the inner peripheral portion of the connector main body by the wedge body fitted between the parallel reinforcing bars from the outside of the connector main body.

Further, as a means for using the joining apparatus of the present invention to join concrete materials, it is characterized in that a pair of reinforcing bars parallel to each other are projected from end faces of concrete to be joined to each other.

Further, the connector of this application is fitted between a parallel body of a connector, which is a hollow pipe, into which a pair of parallel reinforcing bars can be inserted from the same end at a predetermined interval. It is characterized by comprising a wedge body and an insertion hole formed in the joint body for inserting the wedge body from the outside of the joint body.

[0016]

According to the above joining device and joining tool of the present invention,
Since two rebar ends are inserted into both ends of the joint body consisting of a hollow pipe, and a wedge body is inserted between the rebars to join, the two rebars are inserted into both ends of the joint body. With the reinforcing bar of No. 1, it is possible to sufficiently support the pulling force without generating a rotating force as in the conventional case.

[0017]

EXAMPLES Examples of the present invention applied to a joint portion of a concrete foundation made of precast concrete will be described below. That is, as shown in FIG. 5, the concrete foundation made of precast concrete is one in which the footing part (11) and the cloth part (12) are preformed in advance and is carried into the site, and they are joined in the longitudinal direction. The concrete foundations (13) and (13) are joined to each other at the joint portion (1) of the present invention.
5) is used. In this case, as shown in FIG. 1, two different diameter reinforcing bars (14) and (14) are embedded in the concrete foundation (13) in advance at the joint end surface of each concrete foundation (13). It projects in parallel with the top and bottom.

The connecting tool (16) of the present invention comprises a connecting tool body (17) made of a hollow hollow pipe and a space between the reinforcing bars (14) and (14) inserted into the connecting tool body (17). It is composed of a wedge body (18) which is driven into and fitted into.
The joint body (17) has two rebars (14) (14) inserted from both ends at predetermined intervals.
It has a vertically long hollow part (17a), and the rebar (1
The intervals of 4) and 14) are set to be slightly smaller than the width of the wedge body (18) fitted between the reinforcing bars (14) and (14). In the wedge body (18), the contact portions of the fitting portions on the side of the reinforcing bars (14) (14) are flat (19) (19). The flat portions (19) and (19) are parallel to each other, and the tip portion thereof is a taper portion (20).

On the other hand, in the connector main body (17), the wedge body (18) can be inserted between the rebars (14) inserted at both ends so that the wedge body (18) can be inserted in the longitudinal direction at a substantially central portion thereof. Two insertion holes (21) and (21) are formed.

FIG. 2 shows a state in which the wedge body (18) is hammered in and the reinforcing bars (14) are joined together. When the wedge body (18) is hammered in this way, the upper and lower reinforcing bars (14) parallel to each other are shown. The opposing surface of (14) is slightly crushed by the wedge body (18), and the opposite side is strongly pressed against the inner peripheral surface (17a) of the connector body (17), and the reinforcing bar ( By the frictional force between the inner peripheral surface of the connector (14) and the main body of the connector (17), they are supported without going through the reinforcing bar (14).

FIGS. 3 and 4 show a method of attaching the above-mentioned joining tool body. First, as shown in FIG. 3, one of the reinforcing bars (14) of the basic concrete (13) (13) to be joined to each other is used. ) (14), the fitting main body (17) is externally fitted, and the fitting main body (17) is retracted so that it does not protrude beyond the reinforcing bar (14). (13) is installed at a predetermined position so that the reinforcing bar (14) faces the reinforcing bar (14) of the other party. Then, slide the connector main body (17) in the direction to pull it out from the reinforcing bar (14) in which the connector main body (17) is fitted, and install it over the other party's reinforcing bar (14). Then, the wedge body (18) is driven by using a dedicated tool.

FIG. 6 and subsequent figures show a joint and another embodiment joined by the joint.

In FIG. 6, the diameters of the reinforcing bars (14) and (14) joined to each other are different, and in this case, the reinforcing bars (14) having a small diameter and the reinforcing bars (14) having a large diameter are substantially omitted. A spacer (25) made of a cylindrical body or a half-divided plate having the same outer diameter is provided so that the same rust body (18) can be used for joining.

FIG. 7 shows that in order to increase the frictional force between the reinforcing bar (14) and the connector main body (17), the inner peripheral surface of the connector main body (17) is
It is applied by spraying powder (23). Figure 8
Instead of joining each rebar (14) (14) in a straight line,
Tool body (17) for joining to mold, T shape and cross shape
In the L-shaped joint portion, an L-shaped bent connector body (17) is similarly used as shown in FIG. In the T-shaped portion, as shown in FIG. (B), a connector main body (17) formed in a T-shape so that reinforcing bars can be inserted from three directions is used. Further, in FIG. 7 (c), the connector main body (17) is also formed in a cross shape so that the reinforcing bars can be inserted from four directions.

FIG. 9 shows that in order to further improve the adhesive force of the reinforcing bars (14) to be bonded to the connector body (17), the reinforcing bars (14) fixed by the wedge body (18) are further bonded. A mortar, an adhesive (24) and the like are injected into the ingredient body (17) so that a joint structure having higher strength can be obtained.

FIG. 10 shows a structure made of a plastic material containing a wire mesh instead of the metallic connector body (17). For this kind of plastic material,
For example, aramid fiber or the like can be considered.

In FIG. 11, in order to further improve the support strength of the reinforcing bar (14), a notch (30) is formed in the connector main body (17), and each piece divided at the notch (30) part is inward. As shown in FIG. 13, it is bent and bent so that it is engaged with the outer peripheral surface of the reinforcing bar (14) in a biting manner, and the reinforcing bar (1
4) is gaining more support. In this case, as shown in FIG. 12, a cross-shaped notch (30) is formed in the side wall of the connector body (17).
Is formed, and the four pieces (31) divided by the notches (30) are folded inward, so that the tips are attached to the outer peripheral surface of the reinforcing bar (14). Further, in the embodiment of FIG. 11, a window hole (33) is formed in the side wall portion of the connector main body (17) approximately in the center between the two wedge body insertion holes (21) (21). Then, the insertion length of the reinforcing bar can be confirmed by checking the tips of the reinforcing bars (14) (14) inserted from both ends through the window hole (33). After joining using the above-mentioned joining tool, ready-mixed concrete (34) is placed in the joining part to integrally form the above precast concrete foundation from the appearance.

Therefore, even when a large number of small block concrete foundations are to be joined together, a highly accurate and integrated concrete foundation can be provided by using the joining device for the reinforcing bars and the joining tool used therefor.

[0029]

As described above, according to the present invention, two parallel reinforcing bars are inserted into both ends of the connector main body made of a hollow pipe, and a wedge member is inserted between the parallel reinforcing bars. Since the two reinforcing bars are joined to each other by inserting them, unlike the conventional method in which one reinforcing bar inserted from both ends is joined to each other by one wedge. Thus, it is possible to obtain a joining device having a sufficient supporting force which is almost the same as that of the two reinforcing bars not only for shearing force but also for tensile force. Moreover, it can be performed by a simple operation of inserting a reinforcing bar into the main body of the connector and driving the wedge body with a dedicated tool, and there is an effect that work can be performed in a short time without requiring special skill or experience.

Further, in the invention of claim 2 of this application, two reinforcing bars are projected in parallel to the end surface of each concrete, and the two reinforcing bars are connected to each other by using the above-mentioned joining tool. Since they are joined together, there is an effect that the concrete can be joined together by a simple operation while supporting the tensile force acting on each concrete.

[Brief description of drawings]

FIG. 1 is a perspective view of a reinforcing bar joint portion showing an embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view of a main part showing a joined state of reinforcing bars.

FIG. 3 is a side view showing a procedure of a method for joining concretes having protruding reinforcing bars.

FIG. 4 is a side view showing a state in which the connector body is also installed across the reinforcing bars to be joined.

FIG. 5 is a perspective view of essential parts showing an arrangement state of basic concrete to be joined using the joining apparatus of the present invention.

FIG. 6 is a vertical cross-sectional view of a reinforcing bar joint portion showing another embodiment of the present invention.

FIG. 7 is a perspective view showing another example of the connector main body of the present invention.

FIG. 8 is a plan view showing another joining method using the joining tool of the present invention.

FIG. 9 is a vertical cross-sectional view of a joint portion showing another joint structure using the joint tool of the present invention.

FIG. 10 is a side view showing another example of the connector body of the present invention.

FIG. 11 is a perspective view showing another example of the connector body of the present invention.

FIG. 12 is a side view of the main part when a cut is formed in the side wall of the connector body in FIG.

FIG. 13 is a vertical cross-sectional view of a main part in the case of joining using the joining tool main body of FIG. 11.

FIG. 14 is a vertical cross-sectional view of a joining portion showing a conventional joining structure of reinforcing bars using a joining tool body made of a hollow pipe.

[Explanation of symbols]

 (13) Foundation concrete (14) Reinforcing bar (16) Joint (17) Joint body (18) Wedge (21) Insert hole

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Yutaka Nunomura 6-2 27 Nakanoshima, Kita-ku, Osaka City Sekisui House Co., Ltd. (72) Hiro Hiroshi Tanimoto 6-2 27 Nakanoshima, Kita-ku, Osaka Sekisui House Co., Ltd. (72) Inventor Toshio Yokoyama 10 Myotoku-cho, Gifu Prefecture Showa Concrete Co., Ltd. (72) Iwamori Mori 3-2 Senmadai Nishi, Koshigaya City, Saitama Prefecture (72) Inventor Omura Masayoshi 4-12-12 Honmachi, Iwatsuki-shi, Saitama Prefecture (72) Inventor Mikihiko Yoshida 183-32 Otsutsumi, Sowa-machi, Sarushima-gun, Ibaraki Prefecture

Claims (3)

[Claims] 1. A rebar outer circumference is formed by inserting a pair of rebar ends parallel to each other into both ends of a joint body made of a hollow pipe, and a wedge body fitted between the parallel rebars from the outside of the joint body. The reinforcing bar joining device is characterized in that the portion is strongly pressed against the inner peripheral portion of the joining tool body. 2. The joining device for reinforcing bars according to claim 1, wherein a pair of reinforcing bars parallel to each other are projected on end faces of concretes to be joined to each other. 3. A connector main body composed of a hollow pipe into which a pair of parallel reinforcing bars can be inserted from the same end at a predetermined interval, a wedge body fitted between the parallel reinforcing bars, and a wedge body thereof. And an insertion hole formed in the connector body for inserting the connector from the outside of the connector body.