JP2002081171A - Reinforcing bar clip for high load - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reinforcing bar clip for high load obtaining a technology with high reliability capable of firmly fixing parallel reinforcing bars to each other by simply work, in building up reinforcing bars of a concrete structure, hardly loosening even in the case of high loading. SOLUTION: The reinforcing bar clip for high load is constituted of a clip body 1 formed in an approximately U-shape from a pair of parallel two faces 11 and 12 arranged at an interval capable of inserting a first reinforcing bar 4 and a second reinforcing bar 5 and boring a slot 11a in one face and a bolt hole 12a in the other face and the rear section 13 for tying a pair of parallel two faces 11 and 12, a terminal section 21a larger than the slot 11a, a screw section 21c projected so as to extend a tapered part 21b and capable of being inserted into the bolt hole 12a, a nut 3 screwing to the screw section 21c and a wedge 2 having the length projecting the screw section 21c from the bolt hole 12a when the screw section is inserted from the slot 11a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of assembling reinforcing bars for a concrete structure, in which two parallel reinforcing bars are firmly fixed in close contact with each other. The present invention relates to a high-load reinforcing bar clip capable of obtaining a high load.

[0002]

2. Description of the Related Art In fixing reinforcing bars of a concrete structure, parallel reinforcing bars are fixed by a soft iron wire or fixed by welding.

[0003]

However, among the above-mentioned conventional fixing methods, the fixing method by bundling with a soft iron wire has problems such as requiring skill in work, weak binding force and easy loosening. In addition, in the fixing method of fixing the reinforcing bars by welding, similar to the method using a soft iron wire, there is a problem that the work requires skill, the workability is poor because the round steel is welded in place, and the weather is affected by the weather. is there. Especially on roads and bridges, a new U-shaped shelf with both ends bent is newly provided to support a large number of PC cables at predetermined positions when reinforcing bars are assembled. It is arranged along the vertical part of the lap and bound by soft iron wire or fixed by welding to provide a shelf, and PC cables are placed on the shelf, but on the shelf before concrete casting. However, since a large load such as the weight or vibration of the PC cable is directly applied to the cable, there is a problem that looseness occurs in the soft iron wire and cracks occur in the welding, resulting in displacement.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and an object of the present invention is to simplify the work of reinforcing steel bars parallel to each other in assembling the reinforcing steel bars of a concrete structure. Accordingly, it is an object of the present invention to provide a high-load rebar clip that can be firmly fixed, is not easily loosened even under a high load, and has high reliability.

[0005]

According to a first aspect of the present invention, there is provided a high-load reinforcing bar clip for fixing a first reinforcing bar and a second reinforcing bar firmly in a parallel state. A pair of parallel two-sided portions each having a long hole on one side and a bolt hole on the other side, and a pair of parallel two-sided portions; A clip main body formed in a substantially U-shape from a back portion connecting the two surface portions, a terminal portion larger than the long hole, and a screw portion projecting so as to extend the tapered portion and capable of passing through the bolt hole. And a wedge having a length protruding from the bolt hole when the screw is inserted through the elongated hole.

According to a second aspect of the present invention, in the high-load reinforcing bar clip according to the first aspect, the pair of parallel two-faced portions includes:
The first reinforcing bar and the second reinforcing bar, which are arranged in contact with each other in the cover thickness direction of the concrete, have an interval capable of being inserted from the outside in the cover thickness direction.

According to a third aspect of the present invention, in the high-load rebar clip according to the first or second aspect, the external thread of the threaded portion projecting from the wedge tip has a thread groove curved in a concave cross section. It is characterized in that the nut to be screwed has a thread curved into a convex cross section to be screwed into the screw groove curved into a concave cross section.

[0008]

According to the high load rebar clip of the first aspect, the first rebar and the second rebar are inserted into the clip body, the wedge is inserted from the elongated hole to the bolt hole, and the first rebar and the second rebar are connected. It is arranged in the space surrounded by the clip body and the wedge. Then, by screwing the nut to the threaded portion protruding from the bolt hole and tightening the nut, the interval between the pair of parallel two surface portions is reduced, and the wedge enters the elongated hole, thereby being surrounded by the clip body and the wedge. The space is narrowed, the first rebar and the second
The rebar is restrained by the clip body and the wedge, and is firmly fixed in a close contact state.

In the high-load reinforcing bar clip according to the second aspect, when the first reinforcing bar and the second reinforcing bar lining up in contact with each other in the concrete cover thickness direction are fixed, the protrusion outward in the cover thickness direction is a rear surface. Only the thickness of the part is suppressed, and the required cover thickness can be protected.

In the high-load reinforcing bar clip according to the third aspect, by using an arc-shaped screw, there is no bite of sand or the like in the thread groove, so that the work can be smoothly performed even in a site where conditions are poor. .

[0011]

Embodiments of the present invention will be described below with reference to the drawings. (Embodiment 1) FIG. 1 is a perspective view showing a configuration of a high-load reinforcing bar clip of Embodiment 1, and FIG. 2 is a plan view showing a method of using the high-load reinforcing bar clip. In the drawing, 1 is a clip body, 2 is a wedge, 3 is a nut for tightening the wedge, 4 is a first reinforcing bar, 5 is a second reinforcing bar, and both the first and second reinforcing bars are made of a mild steel material. It is a reinforcing bar, and large-diameter ribs are provided at predetermined intervals in the axial direction. Also, the second
The diameter of the reinforcing bar 5 is formed larger than the diameter of the first reinforcing bar.

The clip body 1 is formed, for example, in a U-shape having a pair of parallel two-surface portions 11 and 12 facing each other by bending a steel plate and a back surface portion 13 connecting them. An elongated hole 11a is drilled at the center of the parallel hole, and a bolt hole 12a is drilled at the center of the parallel two-plane portion 12. The hole 13a formed in the center of the back portion 13 is for improving the penetration of the cement inside the back portion 13 at the time of cementing.

The wedge 2 has a terminal end 21a larger than the entire length of the elongated hole 11a in the wedge main body 21, and a tapered portion 21b having a curved contact surface at both ends is provided with the tapered portion 21b. A screw portion 21c protruding from the bolt hole 12a is provided so as to extend. This screw part 21
c has a length protruding from the bolt hole 12a of the parallel two-surface part 12 when the wedge 2 is inserted from the long hole 11a of the parallel two-face part 11. The nut 3 for tightening the wedge is formed to be screwable with the threaded portion 21c of the wedge 2.

Next, as a method of using the high-load reinforcing bar clip of the present embodiment, a bent portion of a shelf bar whose both ends are bent is fixed horizontally to a vertically extending stirrup in a reinforcing bar assembly work of a bridge. In the case, the bent part of the shelf
The reinforcing bar 4 and the stirrup will be described as a second reinforcing bar 5. First, the first reinforcing bar 4 and the second reinforcing bar 5 are brought into contact with each other in a row in the direction of the cover thickness of the concrete, and the clip body 1 is covered from the outside in the cover thickness direction with the elongated hole 11a facing the first reinforcing bar 4 side. . At this time, both the first reinforcing bar 4 and the second reinforcing bar 5 are in contact with the inner surface of the back surface 13 of the clip body 1.

Next, the screw portion 21c of the wedge 2 is inserted from the long hole 11a side to the bolt hole 12a, the nut 3 is screwed into the screw portion 21c protruding from the bolt hole 12a, and the nut 3 is screwed using a ratchet spanner or the like. Firmly. Then, the space between the parallel two-faced portions 11 and 12 is reduced, and the space surrounded by the clip body 1 and the wedge 2 is reduced by the wedge body 21 entering the clip body 1 through the elongated hole 11a. And the second reinforcing bar 5 include the clip body 1 and the wedge 2
And firmly fixed in close contact.

As described above, in the high-load reinforcing bar clip according to the present embodiment, the clip main body 1 is put on the first reinforcing bar 4 and the second reinforcing bar 5 which are in contact with each other, and the parallel two-sided portions 11, 1 are covered.
The first reinforcing bar 4 and the second reinforcing bar 5 can be firmly fixed only by passing the screw portion 21c of the wedge 2 through the screw 2 and screwing the nut 3 into the screw portion 21c and tightening the nut 3. In addition, since anyone can easily and quickly set using only the ratchet spanner, no work is required and the workability is good.

Further, since the nut 3 is used for fixing the wedge 2, the vibration of the vibrator at the time of placing the concrete is not loosened. Furthermore, since the protrusion of the concrete to the outside of the cover thickness can be suppressed only to the rear portion 13 of the clip body 1, the required cover thickness is protected. In addition, the nut 3 is not easily loosened by the spring action of the steel plate.

(Embodiment 2) Next, Embodiment 2 will be described. FIG. 3 is a perspective view showing a clip body according to the second embodiment. The high-load rebar clip of the present embodiment is characterized in that a substantially hemispherical locking projection 6 is provided on the inner surface side of the back portion 73 of the clip body 7. This locking projection 6
The top is provided on a perpendicular line lowered from the contact position between the inserted first reinforcing bar 4 and the second reinforcing bar 5 to the back portion 73 side, and when the reinforcing bars are fixed to each other, the adhesion between the reinforcing bars and the back portion 73 of the reinforcing bar are provided. It is large enough not to hinder contact with In the high-load reinforcing bar clip according to the present embodiment, the locking projection 6 engages with the fixed ribs of the first reinforcing bar 4 and the second reinforcing bar 5, whereby the positional displacement of the clip body 7 in the vertical direction is ensured. Can be blocked.

(Embodiment 3) Next, Embodiment 3 will be described. FIG. 4 is a cross-sectional view illustrating a screw portion according to the third embodiment. In the high-load rebar clip of the present embodiment, the male screw 81 of the screw portion 8 protruding from the tip of the wedge main body 21 has a screw groove 81a curved in a concave cross section. The thread groove 81a curved to have a concave section.
It is characterized in that it has a thread 10 which is convexly curved in cross section and which is screwed into the thread. In the high-load reinforcing bar clip according to the present embodiment, the screw portion 8 is formed into an arc-shaped screw so that sand or the like is not caught in the screw groove 81a, so that the work can be smoothly performed even in a site with bad conditions. it can.

Although the embodiments of the present invention have been described above, the specific configuration of the present invention is not limited to the embodiments, and there may be design changes and the like within a range not departing from the gist of the invention. This is also included in the present invention. For example, the thickness of the steel plate forming the clip body can be set arbitrarily. Alternatively, it can be provided by forging or casting. In addition, by making the hole drilled in the center of the back part of the clip body larger, the entry of cement is further promoted, and it becomes easy to bend according to the shape of the reinforcing bar when tightening the wedge, so the state of adhesion to the reinforcing bar It is possible to improve the tightening effect.

[0021]

As described above, in the high-load reinforcing bar clip according to the present invention, the first reinforcing bar and the second reinforcing bar are inserted into the clip body, and the wedge is inserted through the two parallel surface portions. By simply tightening the wedge, the first reinforcing bar and the second reinforcing bar can be firmly fixed in a close contact state, so that anyone can easily perform the operation in a state having good performance, and high reliability can be obtained. .

In addition, by providing a pair of parallel two-faced portions with an interval capable of inserting the first reinforcing bar and the second reinforcing bar which are arranged in contact with the covering direction of the concrete from the outside in the covering direction. The protrusion outward in the thickness direction can be suppressed only to the thickness of the back surface portion, and the required cover thickness can be protected.

Further, by forming the screw portion into an arc-shaped screw, there is obtained an effect that there is no biting of sand or the like in the screw groove, and that the work can be smoothly performed even in a site having bad conditions.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a configuration of a high-load reinforcing bar clip according to a first embodiment.

FIG. 2 is a plan view showing how to use the high-load reinforcing bar clip of the first embodiment.

FIG. 3 is a perspective view showing a clip body according to a second embodiment.

FIG. 4 is a cross-sectional view illustrating a screw portion according to a third embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Clip main body 11, 12 Parallel two-sided part 11a Slot 12a Bolt hole 13 Back part 13a Hole 2 Wedge 21 Wedge main body 21a Termination part 21b Tapered part 21c Screw part 3 Nut 4 First rebar 5 Second rebar

Claims (3)

[Claims] 1. A high-load reinforcing bar clip for firmly fixing a first reinforcing bar and a second reinforcing bar in a parallel state, wherein the first reinforcing bar and the second reinforcing bar are arranged with an interval capable of being inserted. A clip body formed in a substantially U-shape from a pair of parallel two-sided portions having a long hole on one side and a bolt hole on the other side, and a back portion connecting the pair of parallel two-sided portions; A large end portion, a threaded portion protruding to extend the tapered portion and capable of passing through the bolt hole, and a nut screwed into the threaded portion. And a wedge having a length protruding therefrom. 2. A first reinforcing bar and a second reinforcing bar, wherein a pair of parallel two surface portions are arranged in a row in contact with a concrete cover thickness direction.
The high-load reinforcing bar clip according to claim 1, wherein the reinforcing bar clip has an interval that allows the reinforcing bar and the reinforcing bar to be inserted from the outside in the thickness direction. 3. A male thread of a threaded portion projecting from a wedge tip has a thread groove curved in a concave cross section, and a nut screwed into the male screw is threaded into the thread groove curved in a concave cross section. 3. The high-load reinforcing bar clip according to claim 1, wherein the clip has a curved thread.