JP4970577B2 - spacer - Google Patents

Description

  The present invention relates to a spacer used for keeping a concrete cover dimension between a reinforcing bar and an outer surface of a reinforced concrete product at a predetermined level, and more particularly to a block type in which a plurality is stacked.

Various types of block type spacers have been developed for use alone, but there are no types of spacers that can be used by stacking multiple pieces.
Japanese Patent Application Laid-Open No. 2002-106114 discloses a regular hexahedron or a regular octagonal prism type. In the regular hexahedron, one surface of the hexahedron is placed on the formwork or placed on the discarded concrete, 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 placed on the mold or placed on the concrete and the reinforcing bar is supported on the other surface.
JP 2002-106114 A

  Polymerization can be performed if a means for preventing positional displacement when the spacers of JP-A-2002-106114 are stacked one above the other can be used, but the addition of extra means is costly and not substantial.

  In the spacer according to the present invention, the main body has one block shape among a regular polygonal column, a cylinder, a truncated cone, and a truncated pyramid having one surface and the other surface whose outer shapes face each other. The one surface is provided with a plurality of intersecting ridges that receive reinforcing bars, and the other surface is provided with a plurality of intersecting ridges that contact the mold. The protrusion has the same cross-sectional shape as the recess and is located on a plane including the vertical projection surface of the recess.

  This spacer is suitable for use in two or more. That is, since the protrusion has the same cross-sectional shape as the concave stripe and is located on a plane including the vertical projection plane of the concave stripe, a plurality of spacers are employed in the case of a regular polygonal column or a cylinder. When the phases are overlapped while keeping the same phase, the protrusions of the upper spacer that are in contact with each other fit into the recesses of the lower spacer so that the upper and lower spacers closely overlap each other, and as a whole function as one spacer. No unnecessary misalignment prevention means is required. In this case, the fogging dimension is the sum of the fogging dimensions of the spacers, so that the fogging dimension can be increased. Since the concave stripes and the protrusions are a plurality of crossing each other, the spacers can be optimally arranged by selectively using the concave stripes or the protrusions depending on the bar arrangement state, and the plurality of intersecting stripes The spacers can stand on the formwork surface or the discarded concrete surface by the protrusion of the book.

In the case of a truncated cone or truncated pyramid, prepare two or more similar shapes, and if they are in phase with each other, that is, if the upper spacer protrusion is fitted into the lower spacer recess, Positioned spacers closely overlap and function like a single spacer. Therefore, in each case of regular polygonal cylinder and cylinder, truncated cone and truncated pyramid, prepare several types each with different dimensions on the spacer axis, and combine spacers with the same or different dimensions as appropriate. Therefore, the necessary fogging dimensions can be easily ensured by using polymerization.
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. This groove is for stabilizing the reinforcing bar, and is a groove having a larger diameter than the diameter of the reinforcing bar normally used.

(Claim 2) The plurality of recesses and protrusions may intersect at the center of the one surface and the other surface, respectively.
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.

  According to the spacer according to the present invention, the main body portion has one block shape among a regular polygonal column, a cylinder, a truncated cone and a truncated pyramid having one surface and the other surface facing each other, and a reinforcing bar is provided on the one surface. A plurality of intersecting ridges are provided to be received, and a plurality of intersecting ridges that are in contact with the mold are provided on the other surface, the ridges having the same cross-sectional shape as the recesses and the ridges Because it is located on the vertical projection plane of the above, when another spacer is stacked with the same phase maintained, the upper spacer protrusion fits into the lower spacer recess, and the upper and lower spacers closely overlap, It can function as a single spacer. In this case, the cover size is the sum of the cover sizes of the two spacers, so the cover size can be increased, and various types can be combined as appropriate by changing the dimension on the spacer axis. Polymerization By use, the head size required can easily be ensured by using a combination of spacers of different sizes can be adapted to various head sizes. In addition, since the concave stripes and the protrusions are a plurality of crossing each other, the optimal arrangement of the spacers can be achieved by selectively using the concave stripes according to the bar arrangement state. Can stand on its installation surface.

(Claim 2) Since the plurality of recesses and protrusions intersect each other at the center of the one surface and the other surface, even if the direction of the spacer is changed according to the bar arrangement state, the reinforcing bar load is maintained at the center of the spacer. Since it is transmitted to the formwork through the spacer, the spacer does not tilt and can support stably.

  The drawings show specific examples of the spacer according to the present invention, and the same reference numerals denote the same or corresponding parts throughout the drawings.

  FIG. 1 is a perspective view of a spacer according to the present invention as viewed from above with a main body portion formed as a regular polygonal block, FIG. 2 is a perspective view showing the same upside down, and FIG. FIG. 4 is a perspective view seen from above the mold, and FIG. FIG. 5 is a slope view seen from above the truncated cone type, and FIG. 6 is a slope view seen from above the truncated pyramid shape.

  (Claim 1) 1 is a main body, which is in the form of a block having one surface 2 and the other surface 3 facing each other. The main body 1 has an outer shape that is one of a regular polygonal column, a cylinder, a truncated cone, and a truncated pyramid. The one surface 2 is provided with a plurality of intersecting ridges 4 that receive the reinforcing bars T, and the other surface 3 is provided with a plurality of intersecting ridges 5 that abut against the mold F. The protrusion 5 has the same cross-sectional shape as the recess 4 and is located on a surface including the vertical projection surface of the recess 4.

  This spacer is placed on the surface of the formwork F by the ridge 5 on the other surface 3, and supports the reinforcing bar T by the recess 4 on the one surface 2. Since the concave stripes 4 and the protruding stripes 5 are a plurality of crossing each other, the spacers can be optimally arranged by selectively using the concave stripes 4 according to the bar arrangement state. The vertical dimension h from the bottom point of the recess 4 to the top of the protrusion 5 is the concrete cover dimension. Since the main body 1 is in a block shape, the strength is sufficient, and the main body 1 is not deformed or collapsed by the weight of the reinforcing bar T. When the concrete filled in the mold F is solidified and the mold F is removed, the spacer is embedded in the product and is not exposed to the outer surface of the product. Since this other surface 3 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.

Due to its shape, the main body portion 1 has a good balance of support against reinforcing bar loads and is easy to manufacture. When three spacers with the same structure are adopted, and the three spacers are stacked while maintaining the same phase, the upper spacer ridges 5 are fitted into the lower spacer recesses 4 respectively. Three spacers overlap closely to function as one spacer. The cover dimension H in this case is the sum of the cover dimensions h, h ₁ and h ₂ of the three spacers.

  Accordingly, in the case of a regular polygonal column or cylinder, by preparing several types by changing the dimension on the axis of the spacer and using the spacers in combination as appropriate, the necessary cover dimensions can be easily secured. In the case of a truncated cone or a truncated pyramid, it is possible to adapt to various cover dimensions by using a combination of spacers having similar shapes and different dimensions.

  (Claim 2) A plurality of recesses 4 and protrusions 5 intersect at the centers of one surface 2 and the other surface 3, respectively. In this case, even if the direction of the spacer is changed according to the bar arrangement state, the reinforcing bar load is transmitted to the formwork F through the center of the spacer, so that the spacer does not tilt and stable support can be achieved.

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 (2)

  The main body (1) is in the form of one block of a regular polygonal column, cylinder, truncated cone and truncated pyramid having one surface (2) and the other surface (3) whose outer shapes are opposite to each other, and on the one surface (2). A plurality of intersecting recesses (4) for receiving the reinforcing bars (T) are provided, and a plurality of intersecting protrusions (5) contacting the formwork (F) are provided on the other surface (3), A spacer characterized in that the protrusion (5) has the same cross-sectional shape as the recess (4) and is located on the vertical projection plane of the recess (4).   The spacer according to claim 1, wherein the plurality of concave stripes (4) and protrusions (5) intersect at the centers of the one surface (2) and the other surface (3), respectively.

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