JP3216563U - Ribbed concrete stopper around the slab - Google Patents

Abstract

[PROBLEMS] A rib around a slab excellent in workability and economical efficiency, which can eliminate the trouble of closing the entrance of an opening of a through hole having a substantially semicircular cross-section in comparison with a conventional concrete stopper with a rib. Providing concrete stoppers with adhesive.
A concrete stopper with rib 1 is a substantially L-shaped metal strip comprising a lower side 2 placed on the upper surface of a beam 10 and a side 3 rising substantially vertically from one end of the lower side. In the state where the other side end portion of the lower side portion has a constant width 2a and is kept flat so that the cast concrete does not leak out, the metal strip member is spaced in a direction perpendicular to the longitudinal direction at a predetermined interval in the longitudinal direction. A rib 4 protruding in a substantially semicircular cross section is formed on the inner side.
[Selection] Figure 2

Description

  The present invention belongs to the technical field of ribbed concrete stoppers used to construct concrete slabs as waste molds and to prevent the outflow of concrete around the slabs. The present invention relates to a concrete stopper with ribs around a slab which is particularly preferably used when constructing a slab.

When constructing a concrete slab, for example, as shown in FIGS. 9 and 10 disclosed as the prior art in the following Patent Document 1 by the present applicant, a construction method using a concrete leak-proof plate 6 is known.
However, since the concrete leak-proof plate 6 cannot be constructed by projecting a concrete slab to the outside of the beam 1, in this case, as shown in FIG. 11, the lower side 15 and one side end of the lower side 15 A concrete fastening material 18 comprising a side 16 rising vertically from the side 16 and a flange 17 bent perpendicularly from the upper end of the side 16 toward the lower side 15 is used, and the other end of the lower side 15 is a beam. It is placed on the outer end of the material 1 and fixed by spot welding 19 at an appropriate interval in the longitudinal direction, and the concrete stopper 18 is extended over the outside of the beam material 1 and is further installed on the flange 17 and the upper surface of the beam material 1. A large number of fall prevention bars 20 are welded at regular intervals in the longitudinal direction to prevent the concrete stopper 18 from falling outward.

  However, welding a large number of fall prevention bars 20 to the concrete stopper 18 and the upper surface of the beam member 1 has a problem in that it takes a lot of time and the work of attaching the concrete stopper 18 becomes complicated. In addition, there is a problem that the fall prevention bars 20 interfere with other work on the beam member 1 and the workability of the concrete slab construction is deteriorated.

  So, in the said patent document 1, based on the form of the concrete fixing material 18 which concerns on the above-mentioned prior art, a cross-section circular arc shape (henceforth, hereinafter) exists in the direction orthogonal to a longitudinal direction at a fixed space | interval in the longitudinal direction. A so-called rib-attached concrete stopper 23 improved by providing ribs 22 projecting more accurately in the shape of a substantially semicircular arc in section has been developed (see claim 1, FIGS. 1-3).

According to the rib-attached concrete stopper 23 around the slab according to Patent Document 1, the side 16 is provided with a strength that does not warp outward due to the reinforcing effect of the newly formed rib 22. The connection bending portion with the lower side 15 has a strength that does not open outward.
Therefore, the other end 15 of the lower side 15 of the ribbed concrete stopper 23 is placed on the outer end of the beam 1 and is fixed by spot welding 19 at an appropriate interval in the longitudinal direction. When the concrete 4 is placed on the deck plate 2 mounted on the wall, it does not deform at all even if it receives the load, and the ribbed concrete stopper 23 has the function of the formwork (disposal formwork) and the function of preventing the concrete outflow The concrete slab 5 with high accuracy can be constructed. Further, since the conventional anti-falling reinforcing bars 20 are not required, the mounting work of the ribbed concrete stopper 23 is simplified, and the other work on the beam member 1 can be performed smoothly, and the concrete slab is made. Construction workability was improved. Furthermore, since the strength has been increased by the reinforcing effect of the ribs 22, it has become possible to reduce the weight, for example, by reducing the plate thickness.

Utility Model Registration No. 2576409

  According to the rib-attached concrete stopper (23) around the slab according to Patent Document 1, the strength is higher than that of the conventional concrete stopper (18). This is a very useful technique.

However, the rib-attached concrete stopper (23) is a lower side in a direction perpendicular to the longitudinal direction of the strip so that the rib protruding in a substantially semicircular cross section on the inside crosses the strip (concrete stopper). And because it is carried out in a configuration that is continuously provided over the entire length of the side, the placed concrete has a rib formed continuously on the lower side and an upper surface of the beam material. In view of this, there is a new problem of leaking to the outside through the opening portion of the through hole having a substantially semicircular arc shape (substantially semicylindrical shape).
Therefore, when constructing a concrete slab using the above-mentioned ribbed concrete stopper, after the other side end of the lower side is fixed to the outer end of the beam material, before the concrete is placed, the opening of the through hole is opened. It was necessary to add some work, such as closing the entrance of the part with gummed tape.

Therefore, if it is possible to realize a ribbed concrete stopper that can eliminate the trouble of closing the entrance of the opening of the through hole with a gum tape, it is clear that it is more beneficial, such as further improving workability and economy. It is.
Therefore, the object of the present invention is higher than that of the conventional concrete stopper (18), has a high strength, does not require a fall-preventing streak, and can be reduced in weight. Further, the conventional concrete stopper with rib (23) It is to provide a concrete stopper with a rib around a slab that is excellent in workability and economy, and can eliminate the trouble of closing the entrance of the opening of the through hole having a substantially semicircular cross section with gummed tape. .

  As a means for solving the above-mentioned problem, a concrete stopper with ribs around a slab according to the invention described in claim 1 is substantially vertical from a lower side portion placed on the upper surface of the beam material and one side end of the lower side portion. A substantially L-shaped metal strip composed of a side portion that rises on the other side, wherein the other side end portion of the lower side portion has a constant width and is held flat without leaking the cast concrete. A rib protruding in a substantially semicircular cross section inward is formed in a direction perpendicular to the longitudinal direction with a predetermined interval in the longitudinal direction.

  The invention described in claim 2 is the concrete stopper with ribs around the slab described in claim 1, wherein the rib is formed in a substantially L-shaped cross section continuous to the lower side portion and the side portion. It is characterized by that.

  In the invention described in claim 3, in the ribbed concrete stopper around the slab described in claim 1 or 2, a flange portion extending toward the lower side is formed at the upper end of the side portion. Features.

  The invention described in claim 4 is characterized in that in the concrete stopper with ribs around the slab described in claim 3, at least one end portion of the flange portion in the longitudinal direction is cut off.

The ribbed concrete stopper around the slab according to the present invention has the following effects.
(1) Even if the structure is provided with ribs, the other side end of the lower side is held (formed) so that the cast concrete does not leak out with a certain width. No more leaking outside. Therefore, it is possible to eliminate the trouble of sealing with gummed tape as in the past, so after fixing the ribbed concrete stopper on the beam, you can immediately start the concrete placement work, etc. to improve workability and economy Can do.
(2) Of course, like the concrete stopper with rib (23) according to Patent Document 1, the side portion is provided with a strength that does not warp outward, and the side portion is connected to the lower side portion. It is also strong enough not to open outward at the bent part. In other words, the rib reinforcing effect can provide various effects such as high strength, no need for fall-preventing streaks, and weight reduction (for details, see paragraph [0005] above).
(3) As shown in FIG. 8A and the like, a ribbed concrete stopper that does not have a flange portion at the upper end of the side portion can be superposed and stacked. Since the bending process of the flange portion is reduced, the productivity is improved and the weight can be further reduced. In addition, when used by connecting in the longitudinal direction on the beam material, the end portions can be overlap-connected, so that the addition work without gaps can be performed smoothly.
In addition, a ribbed concrete stopper with a flange as shown in Fig. 1 is stronger than a ribbed concrete stopper without a flange, and it fits inside when packed. Can be stacked, so it is not too bulky.
Furthermore, in the rib-attached concrete stopper with at least one end portion in the longitudinal direction of the flange portion as shown in FIG. 6, when used by connecting in the longitudinal direction on the beam member, FIG. As shown in FIG. 3, since the overlapping connection can be made at the part where the flange portion is cut off, the addition work without gaps can be performed smoothly.

It is a perspective view which shows the Example of the concrete stopper with a rib around the slab which concerns on this invention. It is a perspective view which shows the state which fixed the concrete stopper with a rib and deck plate which concern on FIG. 1 on the beam material. FIG. 3 is a cross-sectional view showing a state in which concrete is placed on a deck plate from the state of FIG. It is sectional drawing which shows the state which constructed | assembled the concrete slab seen from the direction different from FIG. It is sectional drawing which expands and shows the concrete stopper with a rib which concerns on FIG. It is a perspective view which shows a part (substantially left half part) of the Example from which the concrete stopper with a rib around the slab concerning this invention differs. It is a perspective view which shows the state which uses the concrete stopper with a rib which concerns on FIG. 6 by adding in a longitudinal direction on a beam material. AC is a perspective view which shows a part (substantially left half part) of the Example from which the concrete stop material with a rib around the slab concerning this invention differs, respectively.

  Next, an embodiment of a concrete stopper with ribs around the slab according to the present invention will be described with reference to the drawings.

1 to 5 show an embodiment of a ribbed concrete stopper 1 around a slab according to the present invention.
The ribbed concrete stopper 1 is a substantially L-shaped metal strip comprising a lower side 2 placed on the upper surface of the beam member 10 and a side 3 rising substantially vertically from one side end of the lower side 2. The other side end of the lower side 2 has a constant width 2a and is held flat so that the cast concrete 11 does not leak out, with a predetermined interval in the longitudinal direction of the metal strip and the longitudinal direction. Ribs 4 projecting in a substantially semicircular cross section are formed on the inner side in the orthogonal direction. A flange portion 5 is formed at the upper end of the side portion 3 so as to extend substantially horizontally toward the lower side portion 2.
The rib 4 is formed in a substantially L-shaped cross section that is continuous with the lower side 2 and the side 3.

As an example, the size and the like of the ribbed concrete stopper 1 according to the first embodiment are 165 mm in width (W) of the lower side 2 and the height (H) of the side 3 so that FIG. 5 is easy to understand. ) Is 165 mm, the plate thickness is 1 mm, and the length is 1950 mm. A rib 4 protruding in a substantially semicircular shape with a cross section of 7 mmR is provided on the inside at an interval of 150 mm (75 mm from both ends) in the longitudinal direction. The configuration is Therefore, although the intermediate portion is omitted in FIG. 1 for convenience of illustration, a total of 13 ribs 4 are formed at substantially equal intervals over the entire length in the longitudinal direction (1950 mm).
And the width dimension (G) of the fixed width 2a (flat) of the other side edge part of the said lower side part 2 is implemented by 10 mm as an example. That is, the rib 4 formed on the lower side portion 2 is end-closed at a portion 2c 10 mm in front of the other side edge 2b of the lower side portion 2 (the forehead is closed). Incidentally, the symbol J in FIG. 5 is implemented by about 5 mm as an example. As an example, the width of reference numeral 5 is about 20 mm.

Thus, when a concrete slab is constructed by projecting outside the beam member 1 using the ribbed concrete stopper 1 having the above-described structure, first, the other side end of the lower side 2 is set to the deck plate 12 as shown in FIG. Is mounted on the outer end of the beam member 10 (H-shaped steel in the illustrated example). At this time, the lower side portion 2 is projected outward about 100 mm in width, and as shown in FIGS. 6 and 7, the end portion of the flange portion 5 is cut out as necessary so that no gap occurs in the longitudinal direction (X Or after being polymerized and connected using a pre-cut ribbed concrete stopper 1, the ribbed concrete stopper 1 is fixed by spot welding (not shown) at intervals of 300 mm to 500 mm in the longitudinal direction.
When the spot welding is performed, the superposition connection state is reliably maintained so that the concrete 11 (noro) never flows out (leaks) from the gap between the adjacent rib-attached concrete stoppers 1 and 1 which are added in the longitudinal direction. Confirm that it is done.
Thereafter, the bar arrangement 13 is made on the deck plate 12, and then the concrete 11 is placed as shown in FIGS. 3 and 4, and the concrete slab 9 is constructed.

  The rib-attached concrete stopper 1 is provided with the strength that the side portion 3 does not warp outward due to the reinforcing effect of the rib 4, and the connecting bent portion between the side portion 3 and the lower side portion 2 is outward. Because it does not open, it does not deform at all even when subjected to the load of the cast concrete 11, and can function as a formwork (disposal formwork) and a concrete outflow prevention function. Can be built.

  In addition, the rib-attached concrete stopper 1 having the above-described structure is held (formed) so that the rib 4 is end-closed and the other side end portion of the lower side portion 2 has a constant width 2a so that the cast concrete 11 does not leak. Therefore, the pouring concrete 11 (noro) never leaked to the outside. Therefore, since it is possible to eliminate the trouble of closing with a conventional rubber tape, it is possible to quickly start the concrete 11 placing work after fixing the ribbed concrete stopper 1 on the beam 10, so that the workability and economy are improved. Can be improved.

8A to C show different embodiments of the ribbed concrete stopper around the slab according to the present invention.
The ribbed concrete stoppers 20, 21, and 22 according to the illustrated example have the same concept as the first embodiment. That is, the rib-attached concrete stoppers 20, 21, 22 are substantially L-shaped including a lower side portion 2 that is placed on the upper surface of the beam member 10 and a side portion 3 that rises substantially vertically from one end of the lower side portion 2. The other end of the lower side 2 has a constant width 2a and is held flat so that the cast concrete 11 does not leak out, and a predetermined interval is provided in the longitudinal direction of the metal strip. Ribs 14, 24, 34 and 44 are formed inwardly and projecting in a substantially semicircular cross section in the direction perpendicular to the longitudinal direction.
Accordingly, the rib-attached concrete stoppers 20, 21, 22 according to the illustrated example have the ribs 14, 24, 34 formed on the lower side 2 end-closed, and the other end of the lower side 2 has a constant width 2 a. Since the cast concrete 11 is held (formed) so as not to leak out, the same effects as in the above embodiment can be obtained (see paragraph [0021] above).

  Explaining the difference from the rib-attached concrete stopper 1 according to the first embodiment, the rib-attached concrete stopper 20 according to FIG. 8A can be stacked because there is no flange portion 5, and has the advantage of not being bulky at the time of packaging. . The ribbed concrete stopper 20 according to FIG. 8B has no particular change in performance, packaging, etc. However, since the rib 4 is continuously formed up to the flange portion 5, it is manufactured (end closing of the side portion of the rib 4). Instead of processing, it takes time to bend the flange portion 5). The ribbed concrete stopper 22 according to FIG. 8C is slightly inferior in strength because no rib is formed at the connecting bent portion between the lower side 2 and the side 3.

  Although the present invention has been described based on the illustrated embodiment, the technical scope of the present invention is not limited to the configuration of the illustrated embodiment. I would like to remind you that the range of design changes, applications, and modifications that will be performed by those skilled in the art as necessary.

1 Concrete stopper with rib 2 Lower side 2a Constant width (flat)
2b Other side edge 2c End closed part 3 Side part 4 Rib 5 Flange part 9 Concrete slab 10 Beam material (H-shaped steel)
11 Concrete (casting concrete)
12 Deck plate 13 Bar arrangement (rebar)
14 Ribs 20 Ribbed concrete stoppers 24 Ribs 21 Ribbed concrete stoppers 34 Ribs 44 Ribs 22 Ribbed concrete stoppers X Cutouts (notches)

Claims (4)

  A substantially L-shaped metal strip composed of a lower side portion placed on the upper surface of the beam material and a side side portion that rises substantially vertically from one side end of the lower side portion, and the other side end portion of the lower side portion is constant. A rib projecting in a substantially semicircular cross section inward in a direction perpendicular to the longitudinal direction with a predetermined interval in the longitudinal direction of the metal strip in a state in which the cast concrete is held flat without leaking. Ribbed concrete stopper around the slab, characterized by being formed.   2. The concrete stopper with ribs around a slab according to claim 1, wherein the rib is formed in a substantially L-shaped cross-section continuous to the lower side portion and the side side portion.   The rib-attached concrete stopper around the slab according to claim 1 or 2, wherein a flange portion extending toward the lower side is formed at an upper end of the side portion.   The rib-attached concrete stopper around the slab according to claim 3, wherein at least one end portion in the longitudinal direction of the flange portion is cut off.

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