JP4672311B2 - spacer - Google Patents

Description

The present invention relates to a spacer that is used to keep the head size of the concrete between the reinforcement and the product outer surface of reinforced concrete products in a predetermined, to those particular be used alone in a block type.

As a block of a spacer for use with a single body, JP-A-6-158785, those square pyramid type in JP-A-2004-132156 Patent and Patent 6-193199 is disclosed. In either case, the bottom surface is applied to the formwork, and the reinforcing bars are supported by the recesses formed on the top surface. The former two have no fixtures, and the last one has a fixture.
Japanese Patent Application Laid-Open No. 2002-106114 discloses a regular hexahedron or a regular octagonal prism type. The regular hexahedron is configured so that one surface of the hexahedron is placed on the formwork and the reinforcing bar is supported on another surface parallel to this surface. In addition, the regular octagonal prism type is one in which one surface of parallel parallel surfaces facing each other on the axis is applied to the mold and the reinforcing bar is supported on the other surface.
JP-A-6-158785 JP-A-6-193199 JP 2004-132156 A JP 2002-106114 A

  In any of the regular quadrangular pyramid types disclosed in Japanese Patent Laid-Open Nos. 6-158785 and 6-193199, the bottom surface is applied to the mold, and the reinforcing bars are supported in the concave grooves formed on the top surface. ing. Since all of these spacers contact the bottom surface with the formwork, the bottom surface of the spacer appears on the surface of the product when the concrete product is completed, and the appearance is poor. Also, since the spacer is in contact with the concrete at the pyramid surface and only fits in the concrete product, if the surroundings of the cast concrete are insufficient and there are gaps in the adhesive surface, the adhesive strength is insufficient. . In this case, the spacer may come out of the product due to an impact, and once it comes off, rainwater enters and corrodes the reinforcing bars, which is very dangerous.

  The quadrangular pyramid type disclosed in Japanese Patent Application Laid-Open No. 2004-132156 is used in a state of an inverted quadrangular pyramid, and of the two surfaces facing on the axis, the wide surface is used as a reinforcing bar support surface to A fixing tool for fixing is provided, and a narrow surface serving as a joint portion with respect to the mold is divided into two by a central groove, or a cross section is a paraboloid. In the case of two minutes, the formwork surface of the formwork is exposed on the outer surface of the product.Therefore, there is a risk of the appearance and the risk of slipping out as described above. Since it is possible, it is necessary to attach it to the reinforcing bar.

  Japanese Patent Application Laid-Open No. 2002-106114 discloses a regular hexahedron or a regular octagonal prism type. The regular hexahedron is configured so that one surface of the hexahedron is placed on the formwork and the reinforcing bar is supported on another surface parallel to this surface. In addition, the regular octagonal prism type is one in which one surface of parallel parallel surfaces facing each other on the axis is applied to the mold and the reinforcing bar is supported on the other surface. Since it is in surface contact with the formwork, there is a risk of bad appearance and slipping out as described above.

Spacer according to the present invention, chromatic vital contour of one surface and the other surface of main body portion is facing away from each other at regular polygonal prism, a cylinder, a block-shaped out of a truncated cone and truncated pyramid, undergo rebar to the one surface A plurality of recesses are provided so as to cross each other, and a plurality of protrusions having an arc-shaped cross section that abuts on the formwork are provided so as to cross each other on the other surface.

The meaning of “having one side facing the other side and the other side” means that the back side of one side and the other side is facing each other by using “backward” as an antonym of “facing” Means. The recess is provided on this one surface, and the protrusion is provided on this other surface. The concave stripe is for stabilizing the reinforcing bar, and is suitable for the cross-sectional shape of the reinforcing bar, but is not particularly limited. In addition, the protrusion on the other surface has an arc-shaped cross section so that the spacer does not come into surface contact with the formwork to prevent the spacer from being exposed to the outer surface of the product and to keep the spacer independent. It is.

This spacer is placed in a line contact state on the formwork surface with a protrusion on the other surface, and supports the reinforcing bar with a recess on one surface. Since the main part is block-shaped, its strength is sufficient and it does not deform or collapse due to the weight of the reinforcing bar. When the concrete filled in the mold is solidified and the mold is removed, the spacer is embedded in the product and is not exposed to the outer surface of the product. Since this other surface of the spacer is covered with concrete, the spacer will not come out of the product unless an external force such as abnormal vibration or impact is applied.

The main body portion is one of a regular polygonal column, a cylinder, a truncated cone and a truncated pyramid, and has a good support balance with respect to a reinforcing bar load and is easy to manufacture.

Recessed strip is a plurality of mutually intersecting, by selectively serviced the concave depending on reinforcement state can optimal placement of the spacer. In addition, the protrusions have a plurality of arcs crossing each other and are in line contact with the formwork or discarded concrete, so that the self-supporting property and load resistance of the spacer are improved, and the arrangement of the spacer with respect to the formwork is stable. Thus, it can sufficiently resist the reinforcing bar load and the spacer is not exposed on the product surface.

(Claim 2) The plurality of concave stripes may intersect at the center of the one surface.
In this way, even if the orientation of the spacer is changed according to the bar arrangement state, the reinforcing bar load is transmitted to the formwork through the center of the spacer, so that the spacer does not tilt and stable support can be achieved.

(Claim 3) The plurality of protrusions may intersect at the center of the other surface.
If it carries out like this, when a spacer is installed with respect to a formwork, the balance will be maintained and favorable arrangement | positioning will be attained.

Spacer according to the present invention, chromatic vital contour of one surface and the other surface of main body portion is facing away from each other regular polygon, cylinder, so truncated cone and truncated pyramid, one of the block-shaped, for main body portion is rebar load Good support balance, sufficient strength, easy fabrication, and multiple concave strips that receive reinforcing bars on one side are provided crossing each other, so the concave strips can be selectively used according to the bar arrangement status By doing so, the spacer can be optimally arranged, and on the other side, a plurality of ridges with an arc-shaped cross section that abuts the mold frame are provided so as to cross each other . This improves the position of the spacer with respect to the formwork.If the formwork is removed, the spacer is not embedded in the product and exposed to the outside. Etc. It is subjected to any external force that, the spacer is not being withdrawn from the product.

According to claim 2 , since the plurality of concave stripes intersect at the center of the one surface, even if the direction of the spacer is changed according to the bar arrangement state, the reinforcing bar load passes through the center of the spacer and enters the formwork. It will be transmitted, and the spacer will not tilt and stable support can be achieved.

According to the third aspect , since the plurality of protrusions intersect at the center of the other surface, when the spacer is installed with respect to the formwork, the balance is maintained and good arrangement is possible.

The drawings show a specific example of the spacer according to the present invention in a state where it is overlapped in order to obtain a large fogging dimension H. Throughout the drawings , the same reference numerals denote the same or corresponding parts.

1 also present the body becomes regular polygonal prism type block, Figure 2 which also has upside down, Figure 3 is cylindrical, Figure 4 which also has upside down, Figure 5 is conical A trapezoidal shape , FIG. 6 shows a truncated pyramid shape .

1 and 2, reference numeral 1 denotes a main body, which has a front surface 2 and another surface 3 facing away from each other and has a regular polygonal block shape. The one surface 2 is provided with a plurality of recesses 4 that receive the reinforcing bars T so as to cross each other. Further, a plurality of protrusions 5 having an arcuate cross section that abuts the mold F are provided on the other surface 3 so as to cross each other.

The spacer is placed on the surface of the formwork F by the protrusion 5 having an arc-shaped cross section on the other surface 3, and supports the reinforcing bar T by the recess 4 on the one surface 2. The vertical dimension h from the bottom point of the recess 4 to the top of the protrusion 5 is the concrete cover dimension. Main unit 1 so blocky strength is sufficient, the support balance for rebar load was good, be collapsed or deformed by the weight of the rebar T is a rather, it is easy to manufacture. Since there are a plurality of the concave stripes 4, the spacers can be optimally arranged by selectively using the concave stripes 4 according to the bar arrangement state.

Since the self-supporting property of the spacer and the load resistance against the reinforcing bar T are improved, the arrangement of the spacer with respect to the mold F is stabilized. When the concrete filled in the mold F misses the mold F to solidify the spacer is embedded in the product, exposing the outer surface of the product rather than, the other surface 3 of the spacer covered with concrete Therefore, the spacer will not come out of the product unless external force such as abnormal vibration or shock is applied.

(Claim 2) The plurality of concave stripes 4 intersect at the center of one surface 2.
In this case, even if the orientation of the spacer is changed according to the bar arrangement state, the load of the reinforcing bar T is transmitted to the formwork F through the center of the spacer, so that the spacer does not tilt and stable support is provided. I can do it.

(Claim 3) The plurality of protrusions 5 intersect at the center of the other surface 3.
In this case, when the spacer is installed with respect to the mold F, the balance is maintained, and a favorable arrangement is possible.

It is the slope view seen from the top which shows the regular polygonal column type | mold of the specific example of the spacer concerning this invention in the state of 3 steps | paragraphs . It is the slope view seen from the state upside down same as the above. It is a perspective view similar to FIG. 1 of the cylindrical type of another aspect. It is the slope view seen from the state upside down same as the above . It is the same perspective view as FIG. 1 of the truncated cone of another aspect. It is a perspective view similar to FIG. 1 of the pyramid of another aspect.

DESCRIPTION OF SYMBOLS 1 Main part 2 One side 3 Other side 4 Concave 5 Projection F Formwork T Rebar

Claims (3)

The main body (1) has one surface (2) and the other surface (3) facing away from each other, and the outer shape is a regular polygon, a cylinder, a truncated cone, and a truncated pyramid in the form of a block. ) Is provided with a plurality of recesses (4) that receive the reinforcing bars (T) crossing each other, and a plurality of protrusions (5) having an arc-shaped cross section that abuts the formwork (F) on the other surface (3). Spacers that are provided so as to cross each other . The spacer according to claim 1, wherein the plurality of recesses (4) intersect at the center of the one surface (2). The spacer according to claim 1 or 2 , wherein the plurality of protrusions (5) intersect at the center of the other surface (3).

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