JPH0654906U - PC Reinforcing Bar Cage Knitting Fitting and Its Mounting Device - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a fitting for firmly fitting the intersection of the main bar and the spiral in the knitting of a PC reinforcing bar cage, and a device for mounting the fitting. [Structure] Open ring cylindrical part 5 for wrapping and fixing the spiral muscle 3
And a pair of V-shaped opposed leaf springs 6 extending from both ends of the ring-opening cylindrical portion 5 for sandwiching and fixing the main bar 2, and further, the ring-opening cylindrical portion 5 and the leaf spring portion 6 The fitting 4 is a spring clip having an inner surface coated with an adhesive.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a fitting for fitting an intersection of a main bar and a spiral bar when knitting a reinforcing bar car for a PC pile or a PC pole, and a device for mounting the fitting.

[0002]

[Prior art]

 Generally, there are roughly two types of reinforcing bar main bar materials for PC piles and PC poles, one of which is low carbon steel of 0.25 to 0.32% C and 0.70 to 0. It is a high carbon steel of about 80C.

Conventionally, low carbon steel is used by knitting a reinforcing steel cage by spot welding with a soft iron wire used as a spiral bar. However, in high carbon steel, the structure is transformed by the heat effect of the point welding and the structure is delayed at the spot welding part. Since it cannot be welded because it will be destroyed and destroyed, the intersection of the spiral muscle is manually bound with a wire to form a reinforcing cage.

On the other hand, as a conventional technique of a reinforcing bar cage knitting method by binding the fastening metal fittings 4A (referred to as fitting metal fittings in the present invention), Japanese Patent Publication No. 53-1747 and FIG. Japanese Patent Publication No. 2-30775 shown in FIG. 11 has been proposed. The former is for binding the fastening tool 1A to the main bar 2 and the spiral bar 3, and the latter is for the fastening metal fitting 1B (binding tip). ) Is tightly bound to the main muscles 2 and the spiral muscles 3 in a crossed state.

In addition, Japanese Patent Publication No. 2-77327 proposes a method of knitting a reinforcing bar cage by bonding without welding, which uses a main bar and a spiral bar of a flat steel wire to connect the intersection points. It is joined by a hot melt type synthetic resin material.

[0006]

[Problems to be solved by the device]

 Thus, in the case of manually binding the intersection of the main muscle and the spiral muscle with a wire, it is inefficient, or the fastening fittings of Japanese Patent Publication No. 53-1747 and Japanese Patent Publication No. 2-30775 described above are used. In the case of tight binding, there is a problem that the reinforcing bar cage is not always tensioned, so the fastening part becomes loose and the reinforcing bar cage is deformed after knitting and cannot be used for the purpose of use.

Further, joining the intersection point of Japanese Patent Publication No. 2-77327 with a hot-melt type synthetic resin material results in high cost because the spiral line is limited to a flat steel wire, and the hot-melt type synthetic resin material is also used. The equipment was complicated in terms of handling, and mass productivity was lacking.

[0008]

[Means for Solving the Problems]

 The present invention has been made in view of the above-mentioned problems, and includes a spring clip capable of firmly fitting the intersection of the main bar and the spiral bar during the formation of the reinforcing steel cage for PC piles and PC poles. It provides a fitting and a mounting device that pushes the fitting at the intersection.

That is, the present invention spirally wraps around a main bar 2 of a plurality of PC steel wires or PC steel bars with a spiral bar 3 of a soft iron wire to form a rebar cage for a PC pile or a PC pole. A fitting metal fitting that fits the intersection of the main muscle 2 used for knitting and the spiral muscle 3, the open ring cylindrical portion 5 enclosing and fixing the spiral muscle 3, and the main muscle 2 being sandwiched and fixed. It is composed of two pairs of opposing V-shaped leaf springs 6 on both end sides extending from both ends of the ring-opening cylindrical portion 5, and the edge portion 7 of the leaf spring portion 6 extends from the edge portion 7 to the edge portion 7. A PC rebar cage having a collar 8 for expanding the leaf spring portion 6 and further applying an adhesive to the inner surface of the ring-opening cylindrical portion 5 that contacts the spiral muscle 3 and / or the leaf spring portion 6 that contacts the main muscle 2. It is a fitting for knitting.

Further, the fitting metal fitting 4 having a leaf spring portion 6 is pushed in and fitted at the intersection of the main bar 2 and the spiral muscle 3, and the fitting metal fitting 4 is opposed to the V-shape. It is composed of an inverted V-shaped expansion guide 11 that expands the leaf spring portion 6 from the edge portion 7 and a bar 14 that slides on the expansion guide 11 and pushes in the fitting 4 so as to expand the leaf spring portion 6. It is a device for attaching a PC metal reinforcing bar cage fitting.

[0011]

【Example】

 Hereinafter, the present invention will be specifically described with reference to the drawings. 1 and 2 are a front view and a side view of an embodiment showing a fitting 4 or a spring clip 4 of the present invention described in claim 1. From these figures, the spring clip 4 has a ring-opening cylindrical portion 5 for wrapping and fixing the above-mentioned spiral muscle 3 and a V-shape for sandwiching and fixing the main wire 2 on both end sides with the ring-opening cylindrical portion 5 as the center. The plate spring portion 6 and the edge portion 7 of the leaf spring portion 6 which are opposed to each other are protruded to extend the leaf spring portion 6 by sliding on an inverted V-shaped enlargement guide 11 of a spring clip attaching device described later. 8 are provided. Further, an adhesive composed of a jelly-like base material 9 and a hardening agent 10 is applied to the inner surfaces of the ring-opening cylindrical portion 5 and the leaf spring portion 6 so as to be configured. This adhesive is for further strengthening the fitting force. In the illustrated case, the adhesive is applied to the ring-opening cylindrical part 5 and the leaf spring part 6, but depending on the degree of the fitting force, either One side is also good.

It should be noted that the ring-opening cylindrical portion 5 and the leaf spring portion 6 are naturally manufactured to have a size suitable for the spiral muscle 3 and the main muscle 2.

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

Next, with respect to the work of pushing the spring clip configured as described above into the intersection of the main bar and the spiral bar of the reinforcing bar cage with the attachment device having the above-described structure, FIGS. Will be explained. First, the attachment device is made to face the intersection of the main muscle 2 and the spiral muscle 3, and the spring clip 4 is loaded from the supply port 13 to the upper position of the expansion guide 11 (state X). After that, when the spring clip 4 is pushed in by the push-in bar 14 toward the intersection, the flange 8 of the leaf spring portion 6 abuts against the enlargement guide 11 and is slid so that the leaf spring portion 6 is expanded from the edge portion 7 (Y shape). state). When pushed further, each leaf spring portion 6 expands, and when it reaches the maximum enlarged state, the collar 8 comes off the enlargement guide 11, each leaf spring portion 6 contracts, and the main bar 2 is fixed and at the same time the spiral bar 3 is fixed. Also envelop (Z state).

Further, a jelly-like base material 9 and a hardening agent 10 are pre-applied to the inner surface of the ring-opening cylindrical portion 5 and each leaf spring portion 6 of the spring clip 4 that contacts the main muscle 2 and the spiral muscle 3. An adhesive (for example, trade name: Pando 20B manufactured by ThreeBond Co., Ltd.) is mixed with each other at the same time as the fitting and then cured and bonded.

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

[0017]

[Effect of device]

 As described above, according to the present invention, since the intersection of the fitting portions of the main muscle 2 and the spiral muscle 3 can obtain both the fixing force by the spring force and the adhesive force by the adhesive, the fitting is strong, Also, since mechanical strength such as toughness of the joint is not deteriorated and the strength after fitting can be maintained without loosening, it is possible to suppress the deformation after the reinforcing car cage formation, and the efficient PC rebar A basket can be manufactured.

[Brief description of drawings]

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

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

3 is a partially cutaway front view showing the attachment 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.

FIG. 4 is a partially longitudinal side view showing the attachment device of the present invention in which the spring clip of FIG.

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

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

FIG. 7 is a side view showing a fitted state of the spring clip pushed into the intersection of the main bar and the 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 reinforcing bar cage knitting method using binding not using welding.

FIG. 9 is a perspective view showing a fitted state of a conventional example of a reinforcing bar cage knitting method using binding not using welding.

FIG. 10 is a perspective view showing a cross-shaped cross-shaped fastening metal fitting of another conventional example of the method for knitting a reinforcing steel car by tight binding without welding.

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

[Explanation of symbols]

 1 Fastening Metal Fitting 2 Main Bar 3 Helix 4 Fitting Metal Fitting (Spring Clip) 5 Ring Opening Cylindrical Part 6 Leaf Spring Part 7 Edge Part 8 Tsuba 9 Main Agent 10 Curing Agent 11 Enlargement Guide 12 Support Frame 13 Supply Port 14 Push-in Bar

Claims (3)

[Scope of utility model registration request] 1. A main bar 2 of a plurality of PC steel wires or PC steel rods.
A spiral wire 3 is wound around the circumference consisting of a soft iron wire to fit the intersection of the main bar 2 and the spiral bar 3 used for knitting a rebar cage for a PC pile or PC pole. A metal fitting, which is a ring-opening cylindrical part 5 for wrapping and fixing the spiral muscle 3, a flat plate part extending left and right from the ring-opening part of the ring-opening cylindrical part 5, and connected to each edge of both ends of the flat plate part. , And two pairs of leaf spring portions 6 arranged in a V shape with a narrower distance toward the front end portion. Further, the edge portions 7 of each leaf spring portion 6 are arranged from the edge portion 7 to the edge portion 7. A fitting for metal fitting for a PC rebar cage, which is provided with a collar 8 for expanding the leaf spring portion 6. 2. A PC cylindrical reinforcing bar cage fitting fitting (4), and further an annular cylindrical portion or / and a main reinforcing bar (2) in contact with the spiral reinforcing bar (3).
An adhesive fitting is applied to the inner surface of the leaf spring portion (6) in contact with the PC rebar cage cage fitting fitting according to claim 1. 3. A device for press-fitting a fitting 4 having a leaf spring portion 6 at an intersection of a main bar 2 and a spiral 3, which is a leaf spring facing the V-shape of the fitting 4. An inverted V-shaped expansion guide 11 that expands the portion 6 from the edge portion 7, and a bar 14 that pushes the fitting 4 to push the fitting metal member 4 so as to expand the leaf spring portion 6 by sliding on the expansion guide 11. Item 1
Installation device for PC metal fittings for car reinforcement.