JP2009209546A - Horizontal slit protection element and structure of wall part - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a horizontal slit protection element and a wall part capable of ensuring a protective covering in a horizontal construction joint part and achieving excellent strength in concrete filling density. <P>SOLUTION: This horizontal slit protection element has a wall bar insertion part in which a lower end part of a vertical wall bar of a wall bar to be buried into the wall part is inserted, a bottom part, and a wall bar supporting part positioned between the wall bar insertion part and the bottom part. The wall bar insertion part and the wall bar supporting part have substantially the same cross sectional shape, and area of a bottom surface of the bottom part when viewed in a plane is larger than cross sectional area of the vertical wall bar. Three projecting parts are formed in at least three directions of radiation on the bottom surface, and each of the projecting parts has a substantially bowl shape in its cross sectional shape in the direction crossing the bottom surface orthogonally. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a horizontal slit protection member that protects a horizontal slit embedded in a wall portion of a concrete building from a load of the wall reinforcement, and a structure of the wall portion that can satisfactorily protect the horizontal slit against the load of the wall reinforcement. It is about.

  In general, concrete buildings are designed to secure the strength of the building itself with columns and beams, and the walls are made of concrete for each of multiple areas divided in consideration of the arrangement of steel frames (columns and beams, etc.). It is designed to be formed. Specifically, the wall part is a combination of wall bars (reinforcing bars embedded in the wall part, generally vertical wall bars (rebars positioned in the vertical direction) and horizontal wall bars (rebars positioned in the horizontal direction) in the formwork. It is formed by placing the upper part of the upper part into a reinforcing bar embedded in the beam part by welding or the like and then placing concrete in the formwork. A vertical joint portion is formed at the boundary portion with the pillar portion and the like at both ends of the wall portion, and a horizontal joint portion is formed at the boundary portion with the floor at the lower end of the wall portion. (The wall portion is formed such that the upper end side is integrally formed with the beam and is suspended from the beam).

  Thus, in concrete buildings, columns and beams can withstand forces such as earthquakes, while part of the force applied to the walls is distributed to the horizontal and vertical joints. Seismic slits are embedded in the horizontal and vertical joints to absorb and relieve the shearing force and pressure generated by the dispersed force so that no cracks or the like occur in the wall. The earthquake-resistant slit is formed of an elastic material such as butyl rubber or polyethylene foam, and can absorb and relieve a shearing force and the like.

  By the way, when the wall reinforcement is positioned in the formwork, the weight (load) of the wall reinforcement is applied to the horizontal seismic slit (hereinafter referred to as “horizontal slit”) through the vertical reinforcement, and the flow of concrete during concrete placement Acts on the wall streaks and becomes a load on the horizontal slit. If these loads act directly on the horizontal slit from the vertical wall streaks, the upper surface of the horizontal slit will be damaged. If the watertightness of the horizontal slit deteriorates due to breakage, rust may be generated in the vicinity of the lower end of the vertical wall bars in contact with the horizontal slit.

  Therefore, when the wall bars 21 are positioned in the formwork, as shown in FIG. 9, so-called concrete dice 1 placed on the upper surface of the horizontal slit 20 (cubic concrete with each side having a side of 30 to 35 mm, for example) By placing the lower end of the vertical wall bars 21V on the top (for example, using one concrete dice 1 for several vertical wall bars 21V), the load is distributed on the bottom surface of the concrete dice 1 (units). The weight per area is reduced) to prevent the horizontal slit 20 from being damaged, and the distance between the vertical wall streaks 21V and the horizontal slit 20 is maintained. This interval may be referred to as “fog”, and it is desirable to secure about 30 to 35 mm or more (the size and shape of the concrete dice are considered so as to ensure fog).

Further, as shown in FIG. 10, the lower end of the vertical wall stripe 21 </ b> V is covered with a horizontal slit protection member (hereinafter, sometimes referred to as “protective member”) 10, so that the vertical wall stripe 21 </ b> V is horizontal. A device has been devised to disperse the load of the wall bars 21 applied to the slit 20. In this device, the horizontal slit protection member 10 disperses the load applied to the horizontal slit 20 by contacting the horizontal slit 20 with a flat bottom surface having a diameter larger than the diameter of the vertical wall stripe (for example, per unit area). Since the load is reduced), the horizontal slit 20 can be prevented from being damaged, and the occurrence of rust in the vicinity of the lower end of the vertical wall streaks 21V due to the deterioration of the water tightness of the horizontal slit 20 can be prevented (for example, Patent Document 1). .
Utility Model Registration No. 3100127

  However, in the technique using the concrete dice, while fog can be secured, the difference between the cross-sectional shape of the vertical wall streaks (for example, a circle having a diameter of 10 to 13 mm) and the cross-sectional shape of the concrete dice (for example, a square of 30 to 35 mm), Since there is a portion where the cross-sectional shape changes greatly in the vicinity of the boundary between the two, there is a possibility that the flow of the placed concrete is disturbed in the vicinity of the concrete dice and the filling density of the concrete is lowered. On the other hand, when the lower end of the vertical wall bars is covered with a protective member, there is no portion where the cross-sectional shape changes as described above, and the bottom plate of the protective member is thin, so that the flow of the placed concrete is disturbed. Will not occur. However, only the bottom plate portion of the protective member is interposed between the lower end of the vertical wall streak and the horizontal slit, so that the fog cannot be sufficiently secured.

  Therefore, the present invention realizes a structure of a horizontal slit protecting member that can secure fog without disturbing the flow of concrete and a wall portion having a horizontal joint portion that secures fog and has excellent filling density strength in concrete with good workability. This is the issue. Preferably, it is an object to realize a structure of a horizontal slit protection member and a wall portion that can further reduce the load applied to the vertical wall streak and protect the horizontal slit more effectively.

  In order to solve the above problems, the horizontal slit protection member of the present invention includes a wall reinforcement insertion section into which a lower end of a vertical wall reinforcement of a wall reinforcement embedded in a wall section is inserted, a bottom section, and a wall reinforcement insertion section. In a horizontal slit protection member having a wall reinforcement supporting portion positioned between the bottom portion, in order to disperse the load of the wall reinforcement applied to the horizontal slit, the area in plan view of the bottom surface of the bottom portion is inserted into the wall reinforcement insertion portion. It is wider than the cross-sectional area of the vertical wall bars. Further, a convex portion is formed on the bottom surface of the horizontal slit protection member in at least three directions of the radial direction (for example, a radial direction that divides 360 degrees into three equal parts), and the bottom portion is placed on the horizontal slit and the horizontal slit is formed. When the protective member is positioned on the horizontal slit, the convex portion stabilizes the posture of the horizontal slit protective member. Further, the horizontal slit protection member has a wall reinforcement support portion, and maintains a distance between the lower end of the vertical wall reinforcement inserted into the wall reinforcement insertion portion and the horizontal slit at a predetermined interval or more (fogging). For example, 30 mm or more can be secured). Furthermore, the convex portion has a substantially saddle shape in a cross-sectional shape in a direction orthogonal to the bottom surface, and facilitates movement (position adjustment) of the horizontal slit protection member on the horizontal slit.

  Since the horizontal slit protection member has substantially the same cross-sectional shape of the wall reinforcement insertion portion and the wall reinforcement support portion, it does not disturb the flow of concrete placed like a concrete dice. Of course, the height of the bottom, which is the part that supports the wall muscle insertion part and the wall muscle support part, was sufficiently lower than the total height of the wall muscle insertion part height and the wall muscle support part height. Does not disturb the flow of concrete. The shape of the bottom is arbitrary, but when the horizontal slit protection member is positioned on the horizontal slit, for example, if it is a disk shape and the center of the bottom coincides with or almost coincides with the central axis of the wall insertion portion, There is no need to consider the position of the horizontal slit protection member in the rotational direction. If the flat plate forming the bottom has an oval shape and the center of the bottom (the position of the center of gravity of the oval) coincides with or almost coincides with the central axis of the wall insertion portion, the horizontal slit is protected on the horizontal slit. When positioning the member, the major axis and minor axis directions of the ellipse can be set as appropriate.

  Further, the convex portion on the bottom surface has a substantially saddle shape (a shape defined by connecting both ends of a substantially circular arc with a straight line) in a cross-sectional shape in a direction orthogonal to the bottom surface. Therefore, when the horizontal slit protective member is in contact with the horizontal slit only by the convex portion at the bottom, the frictional resistance between the surface of the horizontal slit and the convex portion at the bottom becomes small, and the horizontal slit protective member is Since it can move easily above, the position adjustment of the horizontal slit protection member on the horizontal slit becomes easy.

  If the horizontal slit protection member further has a lateral wall muscle support portion formed in the wall muscle insertion portion, the load of the wall muscle can be supported only by the lateral wall muscle, or the lateral wall muscle together with the vertical wall muscle. It is possible to further disperse the load of the wall bars applied to the horizontal slit.

As described above, the horizontal slit protection member of the present invention does not cause disturbance in the flow of concrete while ensuring fogging, and thus realizes a wall structure having a horizontal joint portion excellent in strength of filling density of concrete. can do.
Furthermore, by providing the horizontal wall streak support portion, it is possible to further disperse the load of the wall streaks applied to the horizontal slit, and thus it is possible to realize a wall structure excellent in further protection of the horizontal slit.

  In addition, when the convex portion is formed on the bottom surface and the horizontal slit protective member is in contact with the horizontal slit only by the convex portion of the bottom portion, the horizontal slit protective member can be easily moved on the horizontal slit. The correction of the inclination of the protective member and the alignment with the vertical wall streaks are facilitated, and the workability is improved.

  Hereinafter, the structure of the wall part using the horizontal slit protective member and horizontal slit protective member concerning this invention with reference to drawings is demonstrated.

FIGS. 1 to 6 illustrate an embodiment (Example 1) of the structure of the wall portion using the horizontal slit protecting member and the horizontal slit protecting member according to the present invention.
First, the configuration and the like of the horizontal slit protection member will be described. As shown in FIG. 1, the horizontal slit protection member 10 </ b> A includes a wall bar insertion part 11, a wall bar support part 12, and a bottom part 13. The wall reinforcement insertion portion 11 and the wall reinforcement support portion 12 have an integrally formed cylindrical shape. One end of the cylinder forms the wall reinforcement insertion portion 11 and the bottom 13 is formed at the other end. The bottom portion 13 has a disk shape, and the central axis of the bottom portion 13 coincides with the central axis Ax of the wall reinforcement insertion portion 11 and the wall reinforcement support portion 12. Three convex portions 14 are formed on the bottom surface 13 a of the bottom portion 13.

  The wall reinforcement insertion portion 11 and the wall reinforcement support portion 12 have a length of, for example, 45 to 50 mm, the bottom portion 13 has a thickness of, for example, 5 mm, and the horizontal slit protection member 10A has a height of 50 to 55 mm. And is formed of a synthetic resin such as polypropylene. The diameters of the outer circumferences of the wall reinforcement insertion portion 11 and the wall reinforcement support portion 12 are, for example, 15 to 16 mm, and the diameter of the bottom portion 13 is, for example, 30 mm.

The wall reinforcement insertion portion 11 has a cross-sectional shape shown in FIG. 2A, and is formed with a thickness of, for example, a little over 1 mm. The inner peripheral surface 11a has a diameter of a little over 13 mm. As shown in FIG. The wall insertion space 11c is formed at a depth of 10 to 15 mm from the upper end 11b of the muscle insertion portion 11. The wall muscle insertion space 11c is adapted to a wall muscle having a diameter of 13 mm or 10 mm, for example.
The wall reinforcement 12 has a height of, for example, 35 mm, and its inner peripheral surface 12a has the same diameter as the inner peripheral surface 11a of the wall reinforcement insertion portion 11, and the inner peripheral surface 12a includes A setup unit 15 is formed. The set-up portion 15 is formed by two partition plates 16 orthogonal to the central axis Ax, and divides the internal space of the inner peripheral surface 12a into four as shown in FIG.

  As shown in FIG. 2 (c), on the bottom surface 13a of the bottom portion 13, three convex portions 14 are equidistantly arranged on a circumference having a diameter that is about a half of the bottom portion 13 around the central axis Ax. (A straight line connecting the center points of the convex portions 14 forms a triangle in the plan view of the bottom surface 13a). These protrusions 14 have, for example, a height of about 3 mm, and their surfaces have a part of a spherical surface (the protrusions 14 have a substantially bowl shape in a cross-sectional shape in a direction perpendicular to the bottom surface 13a. (For example, the cross section passing through the center of the convex portion 14 is a substantially saddle shape in any direction).

Next, support of the wall bars by the horizontal slit protection member 10A, the structure of the wall portion, and the like will be described.
The formation of the wall portion is generally performed as follows. That is, a plurality of horizontal slit protection members 10A are placed on the horizontal slits 20 (at this time, the posture of the horizontal slit protection member 10A is stabilized by the arrangement of the convex portions 14), and an upper floor beam (not shown). 3), the lower wall 21Va of each vertical wall 21V is inserted into the wall of each horizontal slit protection member 10A as shown in FIG. 3 (a). Insert into the part 11 (the tip of the lower end 21Va is brought into contact with the setup part 15). Here, as shown in FIG. 3B, the horizontal slit 20 is positioned on the upper surface of the beam 22 forming a part of the horizontal joint portion, and the wall bars 21 together with the horizontal slit 20 are the outer mold frame 23. And the inner mold 24 are positioned (within the mold). In this state, the bottom 13 of each horizontal slit protection member 10A slightly bites into the surface 20a of the horizontal slit 20 (formed of an elastic material such as butyl rubber) while dispersing the load of the wall bars 21.

  Thereafter, concrete is placed in the space between the outer mold 23 and the inner mold 24 to form a wall portion. Here, as shown in FIGS. 1 and 2, the horizontal slit protection member 10 </ b> A has a circular and constant cross-sectional shape from the wall reinforcement insertion section 11 to the wall reinforcement support section 12 occupying most of the height thereof. Unlike dice, it does not disturb the flow of concrete when placing concrete. Of course, since the height (thickness) of the bottom 13 is as low as 5 mm as compared with the height of the concrete dice (30 to 35 mm), the flow of the concrete is not disturbed.

In the wall portion thus formed, the horizontal slit protecting member 10A separates the lower end portion 21Va of each vertical wall streak 21V from the surface 20a of the horizontal slit 20, so that the fog is sufficiently secured.
It should be noted that the horizontal slit protection member 10A is most excellent in not disturbing the flow of concrete at the time of concrete placement by having the same circular cross-sectional shape from the wall reinforcement insertion part 11 to the wall reinforcement support part 12, but the wall reinforcement Even if the cross-sectional shape of these portions continuously changes from the insertion portion 11 to the wall reinforcement support portion 12 (for example, the outer diameter of the wall reinforcement insertion portion 11 is 15 mm, and the outer diameter of the wall reinforcement support portion 12). Is 15 mm at the boundary with the wall reinforcement insertion portion 11 and 18 mm at the boundary with the bottom portion 13), and does not disturb the flow of the concrete when placing concrete, so the cross-sectional shape of the wall reinforcement insertion portion 11 and the wall reinforcement support portion 12 Can be said to be substantially the same.

  By the way, in order to insert the lower end portion 21Va of the vertical wall line 21V into the wall line insertion space 11c of the horizontal slit protection member 10A, the diameter of the wall line insertion space 11c must be larger than the diameter of the vertical wall line 21V. As shown in FIG. 4A, the horizontal slit protection member 10A may be inclined as a result of play occurring between the inner peripheral surface 11a and the lower end portion 21Va of the wall line insertion portion 11. When the load of the wall reinforcement 21 is applied to the horizontal slit protection member 10A in such a state where the inclination occurs, the bottom slit 13 of the horizontal slit protection member 10A bites into the surface 20a of the horizontal slit 20 and the wall reinforcement in the inclined state. 21 (the surface 20a of the horizontal slit 20 into which the bottom 13 has digged in is illustrated by a one-dot chain line in FIG. 4A).

  However, since the convex portion 14 is formed on the bottom surface 13a of the horizontal slit protection member 10A, the horizontal slit protection member 10A is in contact with the surface 20a of the horizontal slit 20 only with the convex portion 14 (still wall line 21 4), the outer peripheral surface 13b of the bottom 13 of the horizontal slit protection member 10A is placed on the surface 20a of the horizontal slit 20 indicated by the alternate long and short dash line in FIG. Since only the surface of the convex portion 14 is in contact with the surface 20a, the bottom portion 13 of the horizontal slit protection member 10A can be moved in the direction of arrow B in FIG. 4A (convex portion). If there is no 14, the bottom 13 of the horizontal slit protection member 10A bites into the surface 20a of the horizontal slit 20, and the bottom 13 is Also an attempt is made to move to the direction and each other and anti and surface 20a of the outer peripheral surface 13b and the horizontal slit 20 of the bottom 13, the movement becomes extremely difficult).

  Thus, after adjusting the inclination of the horizontal slit protection member 10A (after correcting the inclination of the central axis Ax of the wall reinforcement supporting portion 12), when most of the load of the wall reinforcement 21 is applied to the horizontal slit protection member 10A, the horizontal slit protection is achieved. The bottom portion 13 of the member 10A bites into the surface 20a of the horizontal slit 20, and the load is distributed over the entire bottom surface 13a of the bottom portion 13 (the surface 20a of the horizontal slit 20 into which the bottom portion 13 bites is indicated by a one-dot chain line in FIG. 4B). Exemplify). Thereafter, the wall bars 21 are fixed to the beam by welding or the like, and concrete is placed between the outer mold frame 23 and the inner mold frame 24 to form a wall portion.

  By the way, it can be seen from FIG. 4A that in the horizontal slit protection member 10A, if more fog is to be secured (the wall streak support portion 12 is lengthened), the horizontal slit protection member 10A is more likely to be inclined. . Further, in the case where the applicable vertical wall muscle 21V has a diameter of, for example, 10 mm to 13 mm, when the vertical wall muscle 21V having a diameter of 10 mm is used, the inside of the wall muscle insertion space 11c is more than when the vertical wall muscle 21V having a diameter of 13 mm is used. Since the play at is increased, the horizontal slit protection member 10A is easily tilted. In addition, in the wall bars 21, it cannot be denied that the horizontal slit protection member 10 </ b> A is inclined due to different angles of the vertical wall bars 21 </ b> V with respect to the horizontal slits 20.

However, the horizontal slit protection member 10A can correct the inclination of the horizontal slit protection member caused by the various reasons described above while ensuring sufficient fogging.
If the diameter of the bottom portion 13 is increased, the inclination of the horizontal slit protection member 10A can be reduced, but the bottom portion 13 of the horizontal slit protection member 10A and, for example, a taping portion on the horizontal slit 20 overlap (interfere). Such negative effects can occur. In order to avoid such adverse effects, the bottom 13 may be formed in an oval shape and the horizontal slit protection member 10A may be rotated to avoid a taping portion or the like on the horizontal slit 20. If there are three or more convex portions 14, the horizontal slit protection member 10A can be placed on the horizontal slit 20 in a stable state, and each convex portion 14 is closer to the outer peripheral surface 13b of the bottom portion 13. By providing, the inclination of the horizontal slit protection member 10A can be reduced.

(Modification 1)
FIG. 5 shows a modification (Modification 1) of the horizontal slit protection member 10A. In the modification, for example, as shown in FIG. 5A, four wall reinforcement holding portions 17 are provided at the upper end portion of the wall reinforcement insertion portion 11 at a position that divides the circumference of the wall reinforcement insertion portion 11 into four equal parts. Is provided. As shown in FIG. 5 (b), which shows a schematic cross-sectional configuration in the height direction of the wall reinforcement insertion portion 11, these wall reinforcement holding portions 17 are inclined so as to increase their thickness from the upper end 11b downward. 17a, and a holding surface 17b substantially parallel to the inner peripheral surface 11a of the wall reinforcement insertion portion 11 is formed below the inclined surface 17a. Further, an inner peripheral surface is formed at the lower end of the inclined surface 17a. A retaining surface 17c is formed in a direction substantially orthogonal to the surface 11a. And in the wall-bar holding part 17 in an opposing position, the space | interval D of those holding surfaces 17b is about 10 mm (the space | interval of the upper end of the inclined surface 17a has expanded rather than D).

  Therefore, when the vertical wall muscle 21V having a diameter of 10 mm is inserted into the wall muscle insertion portion 11, the lower end portion 21Va is inserted from the inclined surface 17a portion into the holding surface 17b portion, and enters the wall muscle insertion space 11c. While being held, the tip of the lower end 21Va reaches the set-up portion 15. The retaining surface 17 c prevents the lower end 21 </ b> Va of the vertical wall muscle 21 </ b> V from coming out of the wall muscle insertion portion 11. The distance L between the retaining surface 17c and the setup portion 15 is, for example, about two-thirds of the depth of the wall insertion space 11c. If the interval L is reduced here, the play of the lower end portion 21Va of the vertical wall muscle 21V in the wall reinforcement insertion space 11c is reduced, and if the interval L is zero, the play is minimized (the interval D is the vertical wall muscle 21V). Because it is slightly larger than the diameter of, the play will remain a little). If there are three or more wall reinforcement holding portions 17, the lower end portion 21Va can be held in the wall reinforcement insertion space 11c.

(Modification 2)
FIG. 6 shows another modification (modification 2) of the horizontal slit protection member 10A. FIG. 6A shows a side cross-sectional configuration in the vicinity of the bottom portion 13 in the modified example. In the modified example, as shown in FIG. 6B, the convex portion 14a has a circumferential shape in the vicinity of the outer peripheral surface 13b of the bottom surface 13a. (The convex portion 14a has a substantially bowl shape in a cross-sectional shape in a direction orthogonal to the bottom surface 13a). 6B indicates the top of the convex portion 14a and is circular in a plan view of the bottom 13, and the center of the alternate long and short dash line C1 is at the center of the bottom surface 13a, that is, the central axis Ax. Match.

  The shape of the bottom portion 13 in plan view is not limited to a circle, and may be an ellipse or a polygon. The configuration of the convex portion 14a is limited to that arranged in a circle in the plan view of the bottom portion 13. It may be arranged in an oval or the like. In short, it is only necessary that the surface of the convex portion 14a does not oppose any direction of the surface 20a of the horizontal slit 20.

Next, another embodiment (Example 2) of the horizontal slit protection member according to the present invention will be described with reference to FIGS. 7 and 8. In addition, the same code | symbol is attached | subjected to the component which has a function similar to the horizontal slit protection member of Example 1, and the description is abbreviate | omitted.
As shown in FIG. 7, the horizontal slit protection member 10 </ b> B is obtained by further forming a horizontal wall stripe support portion 18 above the wall stripe insertion portion 11 of the horizontal slit protection member 10 </ b> A. The lateral wall muscle support portion 18 has a height of about 10 to 15 mm and has lateral wall muscle engagement grooves 19 formed at two opposite positions in the diameter direction when viewed from above. These lateral wall line engaging grooves 19 are formed in a width of 10 to 13 mm and are cut out in a substantially U shape from the upper end 18a of the lateral wall line support part 18 toward the wall line insertion part 11. When forming the wall portion, the horizontal slit protection member 10 </ b> B having such a configuration supports (or mounts) the horizontal wall stripe 21 </ b> H of the wall stripe 21 in the horizontal wall stripe engagement groove 19 to support the wall stripe 21. be able to. Of course, since the horizontal slit protection member 10 </ b> B has the wall reinforcement insertion portion 11, it can also support the vertical wall reinforcement 21 </ b> V of the wall reinforcement 21.

  FIG. 8 is a view for explaining the support of the wall bars 21 by the horizontal slit protection member 10B, and the horizontal slit protection member 10B is used together with the horizontal slit protection member 10A. That is, if the horizontal wall stripe 21H of the wall stripe 21 is engaged in the horizontal wall stripe engagement groove 19 of the horizontal slit protection member 10B and the vertical wall stripe 21V of the wall stripe 21 is supported by the horizontal slit protection member 10A, the horizontal slit Since the load of the wall bars 21 applied to the protective members 10A and 10B is reduced by about one-half compared to the case of supporting only by the horizontal slit protective member 10A, the structure of the wall portion excellent in protecting the horizontal slits. Can be realized. Since the horizontal slit protection member 10B also has the convex portion 14 at the bottom portion 13, the frictional resistance between the surface 20a of the horizontal slit 20 and the surface of the convex portion 14 can be reduced. Of course, the wall bars 21 can be supported only by the horizontal slit protection member 10B.

  In addition, this invention is not limited to each Example, It can deform | transform suitably and implement in the range which does not deviate from the meaning.

It is a figure which shows the side schematic structure of one Example (Example 1) of the horizontal slit protective member concerning this invention. It is a figure which shows the schematic cross-sectional structure (a) of the wall reinforcement insertion part of the horizontal slit protection member shown in FIG. 1, the schematic cross-section structure (b) of a wall reinforcement support part, and the planar view schematic structure (c) of a bottom part. It is a figure explaining the structure etc. when mounting the horizontal slit protection member shown in FIG. 1 on a horizontal slit, and positioning in a formwork. It is a figure explaining the inclination adjustment of the horizontal slit protection member shown in FIG. It is a figure explaining the modification of the horizontal slit protection member shown in FIG. It is a figure explaining the other example of a change of the horizontal slit protection member shown in FIG. It is a figure which shows schematic structure of the other Example (Example 2) of the horizontal slit protective member concerning this invention. It is a figure explaining the support of the wall reinforcement by the horizontal slit protection member shown in FIG. It is a figure explaining the support of the wall reinforcement using the conventional concrete dice. It is a figure explaining the schematic cross-sectional structure of the conventional horizontal slit protection member.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10A Horizontal slit protective member 10B Horizontal slit protective member 11 Wall line insertion part 12 Wall line support part 13 Bottom part 13a Bottom surface 14 Convex part 20 Horizontal slit 20a Surface of horizontal slit 21 Wall line 21H Horizontal wall line 21V Vertical wall line 21Va Vertical wall line Lower end part 23 Outer formwork 24 Inner formwork

Claims (7)

A wall reinforcement insertion portion into which a lower end of a vertical wall reinforcement embedded in the wall is inserted; a bottom; and a wall reinforcement support located between the wall reinforcement insertion and the bottom. In the horizontal slit protection member,
Cross-sectional shapes of the wall muscle insertion portion and the wall muscle support portion are substantially the same,
The area in plan view of the bottom surface of the bottom is wider than the cross-sectional area of the vertical wall muscle,
On the bottom surface, convex portions are formed in at least three directions of the radial direction,
The convex portion has a substantially bowl shape in a cross-sectional shape in a direction perpendicular to the bottom surface,
When placing the bottom on the horizontal slit and positioning the horizontal slit protection member on the horizontal slit,
The convex portion stabilizes the posture of the horizontal slit protection member,
A horizontal slit protection member characterized in that a distance between a lower end of the vertical wall bars inserted into the wall bar insertion portion and the horizontal slit can be maintained at a predetermined distance or more.   The horizontal slit protective member according to claim 1, further comprising a horizontal wall stripe support portion formed above the wall stripe insertion portion.   After the lower end of the vertical wall bars of the wall bars are supported by a first horizontal slit protection member and the wall bars are positioned in the formwork, concrete is placed in the formwork. 3. The wall structure according to claim 1, wherein the first horizontal slit protection member is the horizontal slit protection member according to claim 1.   A wall portion formed by placing concrete in the mold after the lateral wall of the wall is supported by a second horizontal slit protection member and the wall is positioned in the mold. In the structure, the second horizontal slit protection member is the horizontal slit protection member according to claim 2, and the structure of the wall portion.   The horizontal slit protection member according to claim 1, wherein the bottom portion has a flat plate shape.   The horizontal slit protection member according to claim 1, wherein the shape of the bottom surface is circular or oval.   The horizontal space according to claim 1 or 2, wherein a distance between a lower end of the vertical wall bars inserted into the wall bar insertion portion and the horizontal slits on which the horizontal slit protection member is placed can be maintained at 30 mm or more. Slit protection member.

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