JP2005320833A - Catch spacer for wall reinforcement and width stop used in common - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a form firmly fixable to a reinforcement, while reducing manufacturing cost by improving a shape of a steel wire spacer for a wall reinforcement into excellent productivity. <P>SOLUTION: A catch spacer for this width stop and the wall reinforcement is constituted so as to firmly join this steel wire and the other straight steel wire by a synthetic resin cap by performing press working of one of two steel wires in an creative shape. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to a reinforced concrete building. Reinforcing bars used for the construction of walls in such buildings must be buried at a predetermined depth from the outer surface of the concrete.
The numerical value of this depth is referred to as “cover”, and the hardware installed on the reinforcing bar for the purpose of ensuring “cover” is referred to as a spacer. The present invention relates to this spacer.

Conventionally, there are various types of spacers for walls, such as steel wire pressed, piano wire homing, mortar homing piano wire fixed, plastic donut shape However, for example, a spacer using a steel wire has a complicated shape and is not sufficiently fixed to the reinforcing bar, so it often falls during work after being attached to the reinforcing bar.
The piano wire homing machine often falls from the reinforcing bars for the same reason. Also, plastic ones are often deformed because of insufficient strength mainly due to their shape, and a predetermined fog cannot be obtained. As described above, each spacer has some problems, and there is a point to be improved.

  Providing the market with spacers as a cheaper product that reduces manufacturing costs. Moreover, once attached to a reinforcing bar, the wall spacer is firmly fixed and does not fall down and has a sufficient strength.

As a result of diligent research, the present inventor has succeeded in producing a steel wire spacer that can be firmly fixed to the reinforcing bar and that can secure an accurate cover and a predetermined interval between the double reinforcing bars at low cost.
This spacer is made by sandwiching the reinforcing bar with another steel wire that has been pressed to determine the distance between one straight steel wire and the duplex reinforcing bar, and fixing both ends with a cap made of synthetic resin. completed.

Hereinafter, the present invention will be described in detail with reference to the drawings.
FIG. 1 is an image view when a hardware according to the present invention is attached to a double bar of a wall.
Here, reference numeral 1 is a steel wire that has been pressed to determine the interval between the duplex bars, reference numeral 2 is a straight steel wire for sandwiching the reinforcing bars, and reference numeral 3 is for fixing one end of these two steel wires. A synthetic resin cap on the side into which the steel wire is inserted in advance, and a reference numeral 4 is a synthetic resin cap for fixing the other ends of the two steel wires. The straight steel wire 2 inserted in advance and placed on the wall rebar after the hardware according to the present invention is pushed into the crack having a constricted shape on the lower side of the cap and fixed, so that the entire hardware according to the present invention is fixed. Is securely fixed to the rebar.
FIG. 2 is a detailed image diagram of the cap made of synthetic resin denoted by reference numeral 3, and has a shape as shown in (a) or (b). Here, reference numeral 5 in (a) and (b) is a hole into which the steel wire is inserted, and reference numeral 6 in (b) is to make it easier to open when placing on the reinforcing bar by opening the side that is not yet fixed with the steel wire of the genuine metal It is a cut for.
FIG. 3 is a detailed image view of the cap made of synthetic resin of reference numeral 4, and reference numeral 7 denotes a constricted portion for preventing the straight steel wire of reference numeral 2 pushed therein from coming off easily.

The spacer for wall reinforcing bars according to the present invention having the above-described structure is firmly fixed to the reinforcing bars, and like a conventional spacer, it may fall down from the reinforcing bars or be displaced due to vibrations at the time of placing concrete. Absent. As a result, the most important rebar-to-rebar spacing and “covering” is assured in the rebar construction. Moreover, the strength against the compressive force received by this type of spacer during construction is 250 kgf or more, which is about five times as strong as a synthetic resin spacer.
Furthermore, due to the use of raw materials that can be purchased at a relatively low cost and a highly productive shape, a significant cost reduction can be achieved, which can be provided to the market at about half the price of a conventional equivalent. In addition, the product of the present invention does not need to be separately attached to both sides of the wall as in the case of the conventional spacer, and it is possible to secure “fogging” on both sides of the wall by one, so that this also brings great benefits to the user.

  The present invention is used in a construction site where the pitch of the main bars (vertical bars of D13) and the reinforcing bars (horizontal bars of D13) is 150 mm, the wall thickness of the frame is 180 mm, the cover is 50 mm, and the horizontal spacing of the reinforcing bars is 60 mm. An experiment was conducted with five spacers in total, 2 at a pitch of 2 m in the horizontal direction and 2 at a pitch of 2 m in the vertical direction. As a result, there was nothing that fell off the steel bar or dropped by the end of concrete placement.

  The image figure of the hardware by this invention.   An image of a synthetic resin cap.   An image of a synthetic resin cap.

Explanation of symbols

1, pressed steel wire 2, straight steel wire 3, synthetic resin cap 4, synthetic resin cap 5, hole into which steel wire is inserted 6, notch 7, constriction

Claims (1)

  A hardware that combines a steel wire having a characteristic shape for determining the space between the wall reinforcement and the double-wall reinforcement, and a synthetic resin cap for fixing the steel wire.

Images