JPS5844186Y2 - Spacer for reinforcing bars - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a spacer for reinforcing bars that maintains the distance between the reinforcing bars and the formwork when the reinforcing bars are installed in the formwork and concrete dough is poured into the formwork.

Concrete molded products with built-in reinforcing bars are commonly used.

When manufacturing the molded product, it is necessary to ensure that the reinforcing bars are placed at the set positions in order to obtain the desired yield strength.

In order to maintain the spacing between the reinforcing bars located at a corner of a concrete molded product where the reinforcing bars intersect with each other, spacers must be fixed to both reinforcing bars that intersect with each other, and spacers must be fixed at each corner of the formwork. The spacer must be in contact with the surface.

However, although conventional reinforcing bar spacers can maintain the spacing between reinforcing bars interposed between opposing formwork surfaces, there is an inconvenience in that a special spacer must be used at a corner portion.

In addition, the reinforcing bar clamping part for fixing to both of the intersecting reinforcing bars has been devised in various ways to facilitate attachment, which inevitably results in a complicated shape.

The present invention was created in an attempt to address this issue.
The gist of this is that it consists of a vertical cylindrical part that passes through one of the reinforcing bars in two directions crossed in a cross shape, and a pair of left-right arms that allow the other reinforcing bar perpendicular to the cylindrical part to pass along the top surface. A reinforcing bar that is integrally arranged at right angles to each other and has a rod-shaped spacer main body that extends in the front-rear direction at the intersection of the cylindrical body part and the arm part, and that holds the reinforcing bar that runs along the arm part. In a reinforcing bar spacer integrally having a clamping part, the reinforcing bar clamping part has a plate-shaped base wider than the tips of the arms, and the central part of the back surface of the base is attached to the tips of the arms. A pair of clamping pieces that clamp the reinforcing bars are integrally molded in a connected shape, and a pair of clamping pieces that clamp the reinforcing bars are integrally provided above the base, and small protruding pieces that extend in the extension direction of the arm parts are each integrally formed on the front surface of the base. In preparation for this, the spacer for reinforcing bars is characterized in that the double projecting pieces are arranged alternately and biased to opposite sides with the longitudinal centers of the arms as the center.

An example of the implementation of the present invention will be described in detail below with reference to the drawings.

In the figure, 1 is a spacer for reinforcing bars according to the present invention.

This spacer 1 is constructed by integrally molding a spacer main body 2, a cylindrical body part 4, a pair of arm parts 5, 5, a pair of reinforcing bar clamping parts 7, 7, and a pair of small projecting pieces 6b, 6b from a synthetic resin material. ing.

The cylindrical body part 4 is made to be penetrated in the vertical direction by one side of two reinforcing bars a, a crossed in a cross shape.

A pair of arm parts 5, 5 are disposed perpendicularly to the upper end of this cylindrical body part 4 and extended from side to side, projecting integrally, and the other side of both of the above-mentioned reinforcing bars is placed along the upper surface of the pair of arm parts 5, 5. It looks like this.

Further, the spacer main body 2 extends in the front-rear direction from the intersection of the cylindrical body 4 and the arm parts 5, 5, and is formed into a bar shape with a semicircular cross section and a smooth upper surface, and the approximately central portion thereof A through hole 3 communicating with the above-mentioned cylindrical body portion 4 is opened therein.

The reinforcing bar clamping parts 7, 7 each have a flat base 6a, and a pair of clamping pieces 8.8 are formed above the base 6a to form a bifurcated shape.

The base 6a is formed wider than the tip of the arm 5, and the back surface of the base 6a is integrally connected to the tip of the arm 5. It is arranged to protrude further upward.

A reinforcing bar a running along the arm 5 is press-fitted into the gap 10 between the clamping pieces 8 and 8 to be clamped.

Further, the small projecting pieces 6b, 6b are integrally provided on the front surface of the aforementioned reinforcing bar holding portion 7゜7, that is, on the opposite side from the arm portion 5, and protrude toward the extension direction of the arm portion 5. The projecting positions of the amphiphilic protrusions 6b are biased toward one edge of the base 6a so that they are alternately located on opposite sides with the center line of the arm 5. They are arranged alternately along the lower front and back positions of the reinforcing bars a held between the pieces 8, 8.

The reinforcing bar spacer according to the present invention is constructed as described above, and as shown in FIG.
When the reinforcing bar spacer 1 is attached to the reinforcing bar a located at a part of the corner of the formwork 11, the spacer body 2, the cylindrical body part 4, and the arm part 5 are attached to each surface forming the corner of the formwork 11. The tips of the small projecting pieces 6a on the tip side come into contact with each other, and the distance between them can be maintained.

As mentioned above, the spacer for reinforcing bars according to the present invention has a through hole penetrating vertically in the approximately central part of the rod-shaped synthetic resin spacer body, and the through hole is provided at the approximately central lower surface of the spacer body. Since it has an integral cylindrical part that communicates with the hole, it can prevent looseness when reinforcing steel is inserted into the hole, and the gap between the concrete material and the formwork will be distorted due to the impact and weight of the gap where concrete material is poured. It becomes something that never happens.

Furthermore, a pair of small projecting pieces are integrally provided on the front surface of the reinforcing bar clamping part provided at the tips of the arms projecting perpendicularly to the spacer main body, and projecting in the extension direction of each arm. By protruding the small protrusions alternately with the longitudinal center line of the arm as the center, the small protrusions are placed along the bottoms of the reinforcing bars on opposite sides of each other, and the reinforcing bars are attached to the reinforcing bar clamping part. When the reinforcing bars are held, the arms reliably support the reinforcing bars and the fixing of the reinforcing bars is stabilized, and since the small protrusions are not directly below the reinforcing bars, the contact state between the reinforcing bars and the small protrusions is not surface contact but line contact. Therefore, even when concrete dough is injected, the adhesion area of the concrete to the spacer is expanded, resulting in an extremely good adhesion rate.

As described above, the spacer for reinforcing bars according to the present invention is particularly effective at some corners, but can also be used as a regular spacer, and can be installed more securely without wobbling.

[Brief explanation of drawings]

The drawings show an example of the implementation of the present invention, and FIG. 1 is a front view of the spacer according to the present invention, FIG. 2 is a plan view of the same, FIG. 3 is a perspective view of the same, and FIG. FIG. 1 is an enlarged front view showing the main parts, and FIG. 5 is a perspective view showing the spacer in use. 1...Spacer for reinforcing bars, 2...Spacer body, 3...Through hole, 4...Cylinder part, 5... Arm portion, 6a...Small protrusion, 7.
...Reinforcing bar clamping part, 8...Pinching piece.

Claims (1)

[Scope of utility model registration request] A cylindrical part in the vertical direction that passes through one of the reinforcing bars in two directions crossed in a cross shape, and a pair of arms in the left and right directions that allow the other reinforcing bar perpendicular to this to run along the top surface are integrated in a mutually orthogonal arrangement. and integrally includes a bar-shaped spacer main body extending in the front-rear direction at the intersection of the cylindrical body part and the arm part, and the arm part integrally has a reinforcing bar clamping part that clamps the reinforcing bar along the arm part. In the spacer for reinforcing bars, the reinforcing bar clamping part has a plate-shaped base wider than the tips of the arms, and the central part of the back of the base is integrally connected to the tips of the arms. A pair of clamping pieces that clamp the reinforcing steel are integrally protruded above the base, and a small protrusion piece extending in the direction of extension of the arm is integrally provided on the front surface of the base. A spacer for reinforcing bars, characterized in that the pieces are arranged alternately with the longitudinal centers of the arms at the center and biased to opposite sides.