JPH11217906A - Spacer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve workability on assembling reinforcements in good appearance by integrally erecting a short columnar lower reinforcement supporting part from the neighborhood of the center of a plate part, providing plural projections on a lower surface of the plate part and forming a supporting recessed part to support a lower reinforcement on a top part of the lower reinforcement supporting part. SOLUTION: A spacer 1 is constituted by integrally erecting a short columnar lower reinforcement supporting part 3 from the vicinity of the center of a plate part 2 and forming projections 8 at four points on a lower surface of the plate part 2. The lower reinforcement supporting part 3 roughly makes a cylindrical shape, and supporting recessed parts 4, 5 to support a lower reinforcement are formed in the orthogonal direction on its top part. Depth of bottom parts of the supporting recessed parts 4, 5 is different from each other, and the supporting recessed parts 4, 5 support the lower reinforcement at different from each other. A through hole 6 is formed on the inside of the lower reinforcement supporting part 3, and it is devised so that a concrete mortar component easily turns to the lower side of the plate part 2 and the lower surface of the plate part 2 is not exposed on a lower surface of a slab structure. An outer edge part 9 slightly erecting from an upper surface of the plate part 2 is formed on an outer periphery of the plate part 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spacer for embedding a reinforcing bar at a predetermined position in concrete by installing the reinforcing bar on a reinforced concrete formwork and maintaining a space between the formwork surface and the reinforcing bar, particularly a slab structure. The present invention relates to a spacer suitable for use in a reinforcing bar.

[0002]

2. Description of the Related Art Spacers used for reinforcing bars of slab structures include those for lower bars and those for upper bars. The lower one is a dice shape made of mortar or plastic, and the upper one is a tall tower made of mortar, plastic or metal, and has a reinforcing bar support that can support the reinforcing bar at the top. I have. Also, JP-A-63-28915
7, actual opening 56-107017, actual opening 60-5392
As shown in FIG. 2, a spacer capable of supporting both the lower muscle and the upper muscle in one place has been proposed. JP-A-63-2
The spacers shown in 89157 and 56-107017 are mortar towers, in which a lower-bar supporting portion for supporting the lower bar and a upper-bar supporting portion for supporting the upper bar are formed. . Japanese Unexamined Utility Model Publication No. 60-53922 discloses an M-shaped support metal fitting for supporting an upper streak in a plastic lower streak spacer to be integrated. Since the bottom of the spacer used for the slab structure is exposed on the lower surface of the slab structure and becomes unsightly, it is desirable to reduce the number as much as possible. Like these,
By using a spacer that can support both the lower and upper muscles in one place, the number of spacers exposed on the lower surface of the slab structure can be significantly reduced.

[0003]

SUMMARY OF THE INVENTION Japanese Patent Application Laid-Open No. 63-2891
The spacers shown in No. 57 and No. 56-107017 are completely integrated for the lower muscle and the upper muscle. Therefore, the spacer for the upper muscle is already set with the lower muscle assembled and the spacer set. It will be. Thereafter, since the upper streaks are assembled, the upper streaks must be assembled while being attached to the spacers, and the assembling work becomes extremely complicated. The structure shown in Japanese Utility Model Application Laid-open No. 60-53922 is different for the lower muscle and the upper muscle, so the lower muscle is assembled, the lower muscle spacer is set, and then the upper muscle is assembled and the upper muscle is assembled. Spacer can be set, and the assembling work of the upper muscle is easy. However, since the upper streak spacer (support fitting) is to be fitted into the hole of the lower streak spacer from above, this work must be performed with the upper streak lifted considerably, and the M-shaped support fitting is not provided. There is considerable difficulty in the installation work. Accordingly, at present, spacers that can support both the lower muscle and the upper muscle at one of these locations are not actually used much.

[0004] The present invention solves the above problems,
It is possible to support both the lower and upper muscles in one place, reducing the number of spacers exposed on the lower surface of the slab structure, improving the appearance, and improving workability when assembling the reinforcing bars. A spacer is provided.

[0005]

SUMMARY OF THE INVENTION The present invention comprises a plate-like portion and a short column-like lower muscle support portion which stands integrally from the center of the plate-like portion. And a support concave portion for supporting the lower muscle is formed at the top of the lower muscle support portion. Since it has a plate-like portion, a tower-shaped spacer for an upper streak can be placed thereon. When the tower type spacer is 4
It has a leg portion of the book, and in a state where the leg portion is placed on the plate-like portion of the spacer, the leg portion straddles the lower muscle support portion of the spacer and the lower muscle supported by the spacer, The top is formed with a recess for supporting the upper streak.

Since the lower muscle and the upper muscle are separate bodies, it is possible to assemble the lower muscle and set the spacer for the lower muscle, and then assemble the upper muscle and set the spacer for the upper muscle. Therefore, the workability of assembling the upper muscle is good. Since the tower-shaped spacer for the upper streak is merely placed on the plate-shaped portion of the spacer for the lower streak, the work of setting the tower-shaped spacer is also easy.

Since there are three or more projections on the lower surface of the plate-like portion, the projections are stably supported on the formwork, and only the tips of the projections are exposed on the lower surface of the slab structure. So almost inconspicuous.

A support recess formed at the top of the lower muscle support portion is formed in two orthogonal directions, and the depths of the bottom portions of the recesses are different from each other so that the lower muscle can be supported at different heights. Can be With this configuration,
By changing the setting direction of the spacer by 90 °, it is possible to cope with different cover thickness. The same applies to the supporting recess for supporting the upper streak of the tower-shaped spacer.

If the lower muscle supporting portion is formed in a cylindrical shape and the inside thereof is formed as a through hole, the mortar component (toro) of the concrete easily flows under the plate-shaped portion even if the plate-shaped portion is formed considerably large, so that the slab is formed. The lower surface of the plate portion is not exposed on the lower surface of the structure.

When an outer edge slightly rising from the upper surface of the plate-shaped portion is formed on the outer periphery of the plate-shaped portion, when the tower-shaped spacer is placed, it does not fall off from the plate-shaped portion.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings showing embodiments. FIG. 1 is a top view and a side view of the spacer 1 of the embodiment, FIG. 2 is a sectional view taken along the line AA of the spacer 1, FIG. 3 is a top view and a side view of the tower type spacer, and FIG.
Is a side view of a used state of the spacer in which the spacer 1 and the spacer 11 are combined, and FIG. 5 is a sectional view taken along the line BB in FIG. 1 and 3, an upper surface is shown on the upper left, a side surface viewed from the X direction on the upper right, and a side surface viewed from the Y direction on the lower left.

The spacer 1 shown in FIGS.
And a short pillar-shaped lower muscle supporting portion 3 which stands integrally from the vicinity of the center. Four projections 8 are provided on the lower surface of the plate-like portion 2.
Are formed. The lower muscle supporting portion 3 has a substantially cylindrical shape, and support concave portions 4 and 5 for supporting the lower muscle are formed at the top thereof. The support recesses 4 and 5 are formed in two directions orthogonal to each other, and the depths of the bottoms of the support recesses 4 and 5 are different from each other, so that the lower muscle can be supported at different heights. In the present embodiment, the height hx to the bottom of the support recess 4 in the X direction in FIG. 1 is 20 mm, and the height hy to the bottom of the support recess 5 in the Y direction is 30 mm. Therefore, when the lower streak is supported by the support recess 4, the cover thickness is 20m.
m, cover thickness 3 when supporting lower muscle with support recess 5
It can be 0 mm. The inside of the lower muscle support part 3 is a through hole 6, and the mortar component (toro) of the concrete easily flows under the plate part 2, and the lower surface of the plate part is exposed on the lower surface of the slab structure. There is no such thing. Further, a reinforcing bridge 7 is formed inside the lower muscle supporting portion 3 to increase the strength. An outer edge 9 slightly rising from the upper surface of the plate portion 2 is formed on the outer periphery of the plate portion 2. Further, four small holes 1 are provided near the outer periphery of the plate-shaped portion 2.
0 is formed through. This is because the spacer can be fixed to the formwork with a nail or the like, and the toro can be easily turned below the plate-like portion.

The tower-shaped spacer 11 shown in FIG.
It has a leg portion 12 of the book, and support recesses 13 and 14 for supporting the upper muscle are formed at the top. The support recesses 13 and 14 are
The supporting recesses 13 and 14 are formed in two directions perpendicular to each other, and the depths of the bottoms of the supporting recesses 13 and 14 are different from each other, so that the upper muscle can be supported at different heights. In the present embodiment, the height hx to the bottom of the support recess 13 in the X direction in FIG.
0 mm, the height hy to the bottom of the support recess 14 in the Y direction is 120 mm.

The spacer 1 and the tower-shaped spacer 11 are
As shown in FIG. 4, they can be used in combination.
That is, the spacer 11 is placed on the plate-like portion 2 of the spacer 1, and at this time, the four legs 12 of the spacer 11 are connected to the lower muscle support portion 3 of the spacer 1 and the lower muscle 20 supported by the lower muscle support portion 20.
Will be straddled. The four legs 12 are placed inside the outer edge 9 of the plate-like portion 2.

[0015]

The spacer of the present invention can be assembled by assembling the lower muscle, setting the spacer for the lower muscle, and then assembling the upper muscle and setting the tower-shaped spacer for the upper muscle. Workability is good. Since the tower-shaped spacer for the upper streak is merely placed on the plate-shaped portion of the spacer for the lower streak, the work of setting the tower-shaped spacer is also easy. The projections on the lower surface of the plate-like portion are stably supported on the formwork, and only the projections are exposed on the lower surface of the slab structure. Therefore, the spacers are hardly conspicuous and are not unsightly.

[Brief description of the drawings]

FIG. 1 is a top view and a side view of a spacer 1 according to an embodiment.

FIG. 2 is a sectional view of the spacer 1 taken along line AA.

FIG. 3 is a top view and a side view of the tower-shaped spacer 11;

FIG. 4 is a side view of a used state of a spacer in which a spacer 1 and a spacer 11 are combined.

FIG. 5 is a sectional view taken along line BB in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Spacer 2 Plate-shaped part 3 Lower muscle support part 4 Depression 5 Depression 6 Through hole 7 Reinforcement bridge 8 Projection 9 Outer edge 10 Small hole 11 Spacer 12 Leg 13 Depression 14 Recess 15 Reinforcement bridge 20 Lower reinforcement 21 Upper reinforcement 21

Claims (6)

[Claims] 1. A plate-like portion 2 and a short columnar lower muscle support portion 3 which stands integrally from the center of the plate-like portion 2 and has three or more projections 8 on the lower surface of the plate-like portion 2, A spacer 1 characterized in that a support recess for supporting the lower muscle is formed at the top of the lower muscle support 3. 2. The spacer 1 according to claim 1, wherein the support recesses 4, 5 formed at the top of the lower muscle support portion 3 are orthogonal to each other.
The spacers 1 are formed in different directions, and the depths of the bottoms of the support recesses 4 and 5 are different from each other, so that the lower muscle 20 can be supported at different heights. 3. The spacer 1 according to claim 1, wherein
A spacer 1 characterized in that the lower muscle supporting portion 3 has a cylindrical shape and a through-hole 6 is formed inside thereof. 4. The spacer 1 according to claim 1, wherein an outer edge 9 slightly rising from an upper surface of the plate portion 2 is formed on an outer periphery of the plate portion 2. 5. The spacer 1 according to claim 1, 2, 3, or 4.
And a tower-shaped spacer 11 that can be placed on the plate-shaped portion 2 of the spacer 1. The tower-shaped spacer 11 has four legs 12, and the legs 12 In a state where the leg 12 is placed on the lower portion 2, the leg portion 12 is connected to the lower muscle supporting portion 3 of the spacer 1 and the lower muscle 2 supported by the lower muscle supporting portion 3.
A spacer that supports the upper streak 21 at the top. 6. The spacer according to claim 5, wherein the support recesses formed on the top of the tower-shaped spacer are formed in two orthogonal directions.
The spacers are characterized in that the bottoms of the bases 3 and 14 have different depths and can support the upper muscle 21 at different heights.