JPH065870Y2 - FRP closure muscle forming tool - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention is made of FRP used for mass production of FRP closing bars embedded in a concrete formwork when manufacturing concrete structures or concrete products. The present invention relates to a closed muscle forming tool.

[Problems to be solved by conventional techniques and devices]

Conventionally, various proposals have already been made for FRP reinforcing bar substitutes used in place of reinforcing bars.

The applicant filed Japanese Patent Application No. 63-28888 as a method for producing a closing bar having a curved portion in the same plane, a hairpin type stirrup, or a circular closing bar by the FRP reinforcing bar substitute material. We are conducting research on bending methods that do not reduce the strength of FRP steel bar substitutes.

From another point of view, Japanese Patent Application No. 1-18019 has filed an application for a closed type FRP reinforcing bar substitute material having high performance.

However, it is difficult to process a reinforcing bar substitute material having a closed bar or a curve having a large number of curved lines and the centers of the curved lines in different directions as shown in FIGS. 6, 7 and 8 by the above-mentioned prior application method. It was confirmed that there is.

The present invention not only enables machining of these problematic shapes, but also FRP closures that enable economical mass production of the closure and spiral muscles that can be manufactured by the Japanese Patent Application No. 1-18019. The present invention relates to the invention of a muscle forming tool.

[Means for Solving the Problems]

The FRP closing bar forming machine for making the rectangular closing bar shown in FIG. 5 will be described below with reference to the accompanying drawings.

The mold bars 8, 9 are attached to two frame plates 6 and 7 of a predetermined size which are opposed to each other.
I fixed it so that I could remove 10,11,
9, 10 and 11 are provided with concave grooves 16 forming curved corners, and guide bars 17 and 18 for guide pins are provided so as to be removable from left and right facing type rods 8 and 9 for the guide pins. The present invention relates to an FRP closed reinforcement forming tool, characterized in that guide pins 19 are planted on the cross plates 17, 18.

〔Example〕

By winding the rod-shaped bundling material 1 drawn out in the semi-cured rod shape by the pultrusion molding machine around the winding jig b, the winding jig b can be easily arranged and held in the prescribed shape.

The winding jig b is housed in a heating furnace and cured by heating.

After curing, the winding jig b is separated to obtain the FRP closing streak a having a predetermined shape.

The illustrated winding jig b will be described.

The four mold bars 8, 9, 10, 11 can be attached to the four corners of two frame plates 6 and 7 of a predetermined size facing each other so that they can be removed, for example, by fixing them with nuts 12 outside the frame plates 6 and 7. Bolt shaft 13
To fit.

The mold rods 8, 9, 10 and 11 are provided with, for example, a concave groove 16 forming a curved corner portion 15 when the rectangular closing bar 14 is molded.

Inside the two mold rods 8 and 9, the guide pin rail plates 17 and 18 are arranged side by side so that they can be removed.

The guide pins 19 are planted on the guide pin boards 17 and 18.

Reference numerals 17 'and 18' in the figure are fixtures.

Explaining the usage in the case shown in the figure, one end of the semi-cured rod-shaped bundling material 1 is fixed to the guide pin 19 ', and wound around the concave groove 16 of the corresponding mold rod 8, 9, 10, 11 once. Guide pin 1
Fold it back at 9 ″, wind it in the opposite direction, then re-guide pin 1
Fold it in the opposite direction at 9.

By repeating this, the final end portion is fixed and placed in a heating furnace and heated to a curing temperature, for example, at 150 ° C. for 60 minutes.

After curing, the points A and B are cut with a grinder.

This cutting may be performed after separating the winding jig b.

Finally, by removing the mold rods 8, 9, 10, 11 from the winding jig b and separating the whole, a closing streak 14 shown in FIG. 5 is obtained.

In the figure, reference numeral 2 is a group of small bundles of continuous fibers, 3 is a thermosetting resin layer, 4
Is an abrasive grain.

[Effect of device]

In the present invention, since the FRP rod-shaped sizing material in the semi-cured state is wound around the winding jig as described above, the upper bending portion that can be easily wound can be curved in a desired curved shape. , Heating the wound jig to harden the FRP rod bundling material, then removing the wound jig and cutting and removing unnecessary parts as necessary to produce a reinforcing bar substitute material of a predetermined shape Therefore, the FRP closed rebar molding tool has the excellent feature that it can easily mass-produce any shape of reinforcing bar substitute.

[Brief description of drawings]

The drawings show one embodiment of the present invention. Fig. 1 is a front view of a part of a closing bar, Fig. 2 is a partial sectional view thereof, and Fig. 3 is a winding jig in which continuous fiber groups are formed in a rod shape. Focused perspective view, FIG. 4 is a plan view thereof, FIG. 5 is a perspective view of the closing muscles, 6, 7, 8
The figure shows the shape of the closing muscle. 6, 7 ... Frame plate, 8, 9, 10, 11 ... Mold rod, 16 ... Recessed groove, 17, 18 ... Cross plate, 19 ... Guide pin.

Claims (1)

[Scope of utility model registration request] 1. A mold bar is detachably fixed to two frame plates of a predetermined size which are opposed to each other, and concave grooves for forming curved corners are juxtaposed to the mold bar. An FRP closed reinforcement forming tool characterized in that guide bars for guide pins are arranged side by side so as to be removable, and guide pins are planted on the guide pins.