JP2565087Y2 - Fitting for PC rebar cage and its mounting device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a fitting for fitting an intersection between a main bar and a spiral bar when knitting a reinforcing rod cage for a PC pile or a PC pole, and for mounting the fitting. Related to the device.

[0002]

2. Description of the Related Art In general, there are roughly two types of reinforcing steel cage main reinforcing bar materials for PC piles and PC poles, one of which is low carbon steel of 0.25 to 0.32% C and 0.7%.
It is a high carbon steel of about 0 to 0.80C.

Conventionally, low-carbon steel is knitted into a reinforcing steel cage by spot welding with a soft iron wire used as a spiral bar, but in high-carbon steel, the structure is transformed by the heat effect of the spot welding and is delayed at the spot weld. Since welding is not possible due to the destruction, the intersection with the spiral is tied manually using a wire to form a reinforced cage.

On the other hand, as a prior art of a method of knitting a reinforcing rod cage by binding a fastener 4A (referred to as a fitting in the present invention), JP-B-53-1747 and JP-A-53-1747 shown in FIGS. Japanese Patent Publication No. Hei 2-30775 has been proposed, in which the former binds the fastener 1A to the main bar 2 and the helical bar 3, and the latter uses the fastener 1B (binding chip) in a cross shape. The main muscles 2 and the helical muscles 3 are tightened in a crossed state.

[0005] In addition, as a method of knitting a reinforcing bar by welding without welding, Japanese Patent Publication No. 2-77327 proposes a method of knitting a reinforcing bar. It is joined by a melt type synthetic resin material.

[0006]

When the intersection between the main muscle and the helical muscle is bound manually by using a wire as described above, the efficiency is poor, or the above-described JP-B-53-1747 and JP-B-27-1 are not available. In the case of the binding with the fastening device disclosed in Japanese Patent No. 30775, there is a problem that the reinforcing bar cage is not always tensed, so that the fastening portion is loosened and the reinforcing bar cage is deformed after knitting and cannot be used for the intended use.

Further, in the joining of the intersections of Japanese Patent Publication No. 2-77327 with a hot-melt type synthetic resin material, the spiral wire is limited to a flat steel wire, which increases the cost,
In addition, equipment for handling the hot melt type synthetic resin material is complicated and lacks mass productivity.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and has a structure in which an intersection between a main bar and a spiral bar at the time of knitting a reinforcing rod cage for a PC pile and a PC pole is firmly fitted. An object of the present invention is to provide a fitting comprising a spring clip which can be attached, and a mounting device for pushing the fitting into an intersection.

That is, according to the present invention, the periphery of the main bar 2 of a plurality of PC steel wires or PC steel bars is formed by a spiral bar 3 of a soft iron wire.
The main reinforcing bar 2 wound in a spiral shape and used when knitting a reinforcing basket for a PC pile or a PC pole,
A fitting for fitting an intersection with the spiral 3,
A ring-opening cylindrical portion 5 that wraps and fixes the spiral 3 and two pairs of opposed V-shaped leaf spring portions 6 at both ends extending from both ends of the ring-opening cylindrical portion 5 that sandwiches and fixes the main reinforcing bar 2. A flange 8 for extending the leaf spring portion 6 from the edge portion 7 is provided on the edge portion 7 of the leaf spring portion 6, and further, the ring-opened cylindrical portion 5 or / And a fitting member for knitting a PC rebar in which an adhesive is applied to an inner surface of the leaf spring portion 6 which is in contact with the main rebar 2.

Further, the present invention is a device for pushing and fitting a fitting 4 having a leaf spring portion 6 at the intersection of the main bar 2 and the helical bar 3. The fitting 4 is opposed to the V-shape of the fitting 4. An inverted V-shaped enlarged guide 11 for expanding the leaf spring portion 6 from the edge portion 7;
This is a mounting device for a PC reinforcing cage knitting fitting comprising a bar 14 which pushes and pushes the fitting 4 so as to spread the leaf spring portion 6 by sliding on the expansion guide 11.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to the drawings. 1 and 2 are a front view and a side view of one embodiment showing the fitting 4 or the spring clip 4 according to the present invention described in claim 1. From these figures, the spring clip 4 has a ring-shaped cylindrical portion 5 that wraps and fixes the above-mentioned spiral bar 3 and a V-shape that sandwiches and fixes the main bar 2 at both ends with the ring-opened cylindrical portion 5 as the center. A protruding flange for expanding the leaf spring portion 6 by sliding the edge portion 7 of the leaf spring portion 6 on the edge 7 of the leaf spring portion 6 by an inverted V-shaped enlarged guide 11 of a spring clip attaching device described later. 8 are provided. Further, the inner surface of the ring-opening cylindrical portion 5 and the leaf spring portion 6 is formed by applying an adhesive composed of a jelly-like main agent 9 and a hardener 10. This adhesive is for further strengthening the fitting force. In the illustrated case, the adhesive is applied to the ring-opening cylindrical portion 5 and the leaf spring portion 6, but depending on the degree of the fitting force,
Either one is good.

Incidentally, the size of the ring-opening cylindrical portion 5 and the leaf spring portion 6 is, of course, manufactured in accordance with the size suitable for the helical bar 3 and the main bar 2.

FIGS. 3 and 4 show the mounting device according to the second embodiment of the present invention, wherein the spring clip 4 is pushed into the intersection of the main bar 2 and the helical bar 3, and FIG. FIG. 4 is a front view of a cutaway section, and FIG. 4 is a side view taken along line AA in FIG. The illustrated mounting device of the present invention has an inverted V-shaped enlarged guide 11 fixed to opposite side surfaces of a support frame 12 such that a flange 8 that expands a leaf spring portion 6 of a spring clip 4 from an edge portion 7 abuts. A supply port 13 for supplying the spring clip 4 is provided in a part of the support frame 12, and the spring clip 4 supplied from the supply port 13 and set at the upper position of the enlarged guide 11 is opened. 5 is a structure composed of a bifurcated push bar 14 that is pushed into the intersection of the spiral muscle 3 and the main muscle 2 without interfering.

Next, the operation of pushing the spring clip constructed as described above into the intersection of the main bar and the spiral bar of the reinforcing bar cage by the mounting device having the above-described structure is described with reference to FIGS. It will be described. First, the mounting device is directly opposed to the intersection of the main bar 2 and the spiral bar 3 and the supply port 1
From 3, the spring clip 4 is loaded at the upper position of the enlargement guide 11 (state of X). Then, when the spring clip 4 is pushed toward the intersection with the pushing bar 14, the flange 8 of the leaf spring portion 6 is pushed.
Is brought into contact with the enlargement guide 11 and is slid, so that the leaf spring portion 6 is expanded from the edge portion 7 (state of Y). When the leaf springs 6 are further pushed in, the leaf springs 6 are expanded, and when they reach the maximum expanded state, the flange 8 is disengaged from the expansion guide 11, and the leaf springs 6 are contracted to fix the main bar 2 and at the same time as the spiral bar 3 (Z state).

Further, a jelly-like main agent 9 and a hardener 10 are applied to the ring-opening cylindrical portion 5 of the spring clip 4 and the inner surface of each leaf spring portion 6 which are in contact with the main bar 2 and the spiral bar 3. An adhesive (for example, Pando 20B manufactured by Three Bond Co., Ltd.) is mixed, cured and joined together at the same time as the fitting.

FIGS. 5 to 7 are a plan view, a front view, and a side view showing a fitted state of the spring clip 4, the main bar 2 and the spiral bar 3 fitted in this manner.

[0017]

As described above, according to the present invention, at the intersection of the fitting portions of the main bar 2 and the spiral bar 3, both the fixing force by the spring force and the bonding force by the adhesive are obtained, so that the fitting is performed. It is strong and does not deteriorate the mechanical strength such as the toughness of the joint,
In addition, since it is possible to maintain the strength after fitting without loosening, deformation after knitting of a reinforcing steel cage can be suppressed, and efficient P
A C-bar can be manufactured.

[Brief description of the drawings]

FIG. 1 is a front view showing a configuration of a spring clip which is a fitting for a PC rebar cage of the present invention.

FIG. 2 is a side view showing a configuration of a spring clip which is a fitting for a PC reinforcing cage of the present invention.

FIG. 3 is a partially cutaway front view showing the attachment device of the present invention by pushing the spring clip of FIG. 1 into the intersection of the main muscle and the spiral muscle.

FIG. 4 is a partial longitudinal side view showing the mounting device of the present invention, in which the spring clip of FIG. 1 is pushed into the intersection of the main bar and the spiral bar.

FIG. 5 is a plan view showing a fitted state of a spring clip pushed into an intersection of a main bar and a spiral bar by the mounting device of the present invention.

FIG. 6 is a front view showing a fitted state of a spring clip pushed into an intersection of a main bar and a spiral bar by the mounting device of the present invention.

FIG. 7 is a side view showing a fitted state of a spring clip pushed into an intersection of a main bar and a spiral bar by the mounting device of the present invention.

FIG. 8 is a perspective view of a fastening fitting showing a conventional example of a method of knitting a reinforcing rod cage by binding without welding.

FIG. 9 is a perspective view showing a fitted state of a conventional example of a method for knitting a rebar cage by binding without welding.

FIG. 10 is a perspective view showing a cross-shaped fastening fitting of a cross in another conventional example of a method of knitting a reinforcing bar by binding not by welding.

FIG. 11 is a front view showing a fitted state of another conventional example of a method of knitting a reinforcing bar by welding without welding.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fastening metal fitting 2 Main bar 3 Spiral bar 4 Fitting metal fitting (spring clip) 5 Ring opening cylindrical part 6 Leaf spring part 7 Edge 8 Flange 9 Main agent 10 Curing agent 11 Enlargement guide 12 Support frame 13 Supply port 14 Push-in bar

Claims (3)

(57) [Scope of request for utility model registration] 1. A main bar 2 of a plurality of PC steel wires or PC steel bars.
Is wound spirally around a spiral wire 3 of a soft iron wire to fit an intersection of the spiral bar 3 and the main bar 2 used for knitting a steel cage for a PC pile or a PC pole. A ring-opening cylindrical portion 5 that wraps and fixes the spiral 3, a flat plate portion extending left and right from the ring-opening portion of the ring-opening cylindrical portion 5, and is connected to each edge of both ends of the flat plate portion. And two pairs of leaf springs 6 arranged in a V-shape with a narrower distance toward the front end. Further, the edge 7 of each leaf spring 6 is attached to the edge 7 from the edge 7. A fitting for knitting PC rebars, wherein a flange 8 for expanding the leaf spring portion 6 is provided. 2. A fitting for metal fittings 4 for knitting of PC reinforcing bars, furthermore, an annular cylindrical portion or / and a main reinforcing bar 2 which is in contact with the helical bars 3.
2. The fitting according to claim 1, wherein an adhesive is applied to an inner surface of the leaf spring portion 6 in contact with the cage. 3. An apparatus for press-fitting a fitting 4 having a leaf spring portion 6 at an intersection of a main bar 2 and a spiral bar 3, the leaf spring being opposed to the V-shape of the fitting 4. An inverted V-shaped enlarged guide 11 for expanding the portion 6 from the edge 7, and a bar 14 for pushing the fitting 4 into and pushing the leaf spring 6 so as to slide on the enlarged guide 11. Item 1
Mounting device for fitting metal fittings for PC reinforced cage.