JPH069251Y2 - Sleeve for concrete driving - Google Patents

Description

[Detailed Description of the Invention] "Industrial application field" The present invention relates to the construction of a duct penetrating portion such as a building.
In particular, the present invention relates to a concrete driving sleeve that can be disassembled when forming the duct penetration portion.

"Conventional technology" When constructing a conventional building, etc., when placing concrete and passing through a duct, determine the part to pass through the pre-caulking duct before flowing concrete, and install a wooden formwork there,
After securing a predetermined space so that concrete does not flow in, concrete is poured, the mold is removed after the concrete is solidified, and a duct is installed in the portion.

“Problems to be solved by the invention” In the conventional technology, it is necessary to arrange a wooden form, that is, a wooden box sleeve in each duct penetration portion. For example, in a construction site such as a hotel, there are 500 such duct penetration portions. In some cases, since the mold is disposable, the cost of the box material is enormous and the work of manufacturing the box sleeve is very large. The present invention solves these drawbacks.

[Means for Solving Problems] In order to solve these problems, the present invention makes it possible to easily attach and detach one sleeve so that it can be used easily and repeatedly. It is desirable to provide a prefabricated sleeve made of a strong iron material.

[Operation] In the present invention, the mold is constructed by using an easily detachable and assembled sleeve, and the mold can be used many times.

[Example] FIG. 1 shows a sleeve 10 according to the present invention. The sleeve 10 has a substantially rectangular cross section, but the cross sectional shape is not limited to this. A rectangle, a circle, etc. are also possible. This sleeve 10 is preferably placed on a concrete pouring surface at a predetermined position after applying a concrete release agent or the like on the outer wall surface, if necessary. Then, except for the inside of the sleeve 10, a predetermined concrete is poured. After the concrete is hardened, the sleeve 10 is removed from the concrete placing portion, and a pipe for water supply and drainage, a pipe for an air conditioner, and other ducts are piped to the portion formed by the sleeve 10.

As shown in FIG. 2, the sleeve 10 is composed of a pair of upper and lower pieces 12 and 14 which are usually the target and the upper and lower pieces 12 and 14.
It is composed of a pair of left and right central part pieces 16 and 17 between them.
Since the upper and lower pieces 12 and 14 are almost symmetrical in shape, only the lower piece 14 will be described in detail. It will be understood that these upper and lower pieces 12, 14 may be left and right pieces depending on the arrangement of the sleeve 10.

The piece 14 includes a bottom surface 20, a pair of left and right upright surfaces 22 and 23 that rise from both sides of the bottom surface, and folding surfaces 24 and 25 that are bent inwardly from the ends of the upright surface.
It consists of The leading edges of the folding surfaces 24 and 25 are preferably double folding edges. Angles 26, 27 are provided between the bottom surface 20 and the raised surfaces 22, 23 for reinforcement.
Is preferably provided. Further, on the bottom surface 20, a reinforcing material 28 (two in the illustrated example) is provided between the angles 26 and 27. Similarly, reinforcing members (two in the illustrated example) are provided between the folding surfaces 24 and 25 and the angles 26 and 27 in the upright surfaces 22 and 23. An auxiliary piece 32 having a generally U-shape is fixed to the rear edges of the upper and lower pieces 12 and 14 so as to be orthogonal to the bottom surface 20, the upright surfaces 22 and 23, and the folding surfaces 24 and 25, respectively. The auxiliary piece 32 is provided with a plurality of nail holes 34 at predetermined intervals. The auxiliary piece 32 is used to reinforce the piece 14 and to fix the sleeve 10 to the mold.

The central pieces 16 and 17 have folding surfaces 36, 37, 38 and 39, respectively, which are folded inward at the upper and lower edges. Between these folding surfaces 36, 37 and 38, 39, a reinforcing member 40 (two in the illustrated example) similar to the reinforcing member 30 is provided. The front reinforcement of at least one of the central pieces 17 has a sloping ridge 42 inclined inwardly toward the front at the center thereof.
Is provided. The inclined raised portion 42 forms an external force receiving means. This external force receiving means can be provided in addition to the reinforcing material. Desirably, these folding surfaces 36, 37, 3
The leading edges of 8,39 are double folded edges.

Further, another auxiliary piece 44 having a nail hole 46 similar to the auxiliary piece 32 is provided at the trailing edges of the central pieces 16, 17.

These folding surfaces 24, 25, 36, 37, 38, 39 preferably have the same contact area with each other.

The upper and lower pieces 12 and 14 and the central pieces 16 and 17 are preferably made of an iron material having the same thickness. Angles 26, 27, reinforcing members 28, 30, 40, auxiliary pieces 32, 4
4 etc. are welding or other means, and each of the parts 12, 14, 16, 1
It is integrally fixed to 7.

When assembling the sleeve 10, the lower piece 14 is placed on a flat surface, and the folding surface 37 of one of the central pieces 16 is placed on one folding surface 24 of the lower piece 14, and these folding surfaces 2
The fastening piece 50 is sandwiched between 4, 37 and these folding surfaces are held together. The fastening piece 50 has a substantially horseshoe-shaped cross section, and is preferably formed of a spring material. The fastening piece 50 has a notch portion 52 for accommodating the reinforcing members 30 and 40.
The fastening piece 50 may have a shape in which the end edge portion 52 of the fastening piece 51 is escaped to the outside so that the two folding surfaces 24 and 37 can be easily held, for example, as shown in FIG. Further, the fastening piece 50 may be of a clip type as shown in FIG. 4 or may be of a slide type as shown in FIG.

Next, the other central piece 17 is installed on the other folding surface 25 by the same procedure, and is fastened by the fastening piece 50. After that, the folding surface of the upper piece 12 is arranged on the other folding surfaces 36, 38 of both the central portion pieces 16, 17, and the fastening pieces 50 are similarly fastened. Each fastening piece 50 is firmly inserted into the notch 52 until the reinforcing members 30 and 40 are completely received. This completes the assembly of the sleeve.

As shown in FIG. 1, after the sleeve 10 is assembled, the sleeve 10 is attached to the auxiliary pieces 32 and 44 by the nail holes 34 and 4 respectively.
The sleeve 10 is fixed to a predetermined position of the concrete panel or the formwork via the sleeve 6. After that, a concrete release agent is applied to the entire outer wall surface of the sleeve 10 and concrete is poured into the periphery thereof.

This sleeve 10 after the concrete that has been driven in is fixed
Need to be separated from the concrete pouring surface.

When separating the sleeve 10 from the concrete surface,
Inclined ridge 42 provided on the reinforcing member 40 of the central piece 17
For example, a bar or the like is inserted, and the central piece 17 is extruded inward toward the other central piece 16 side. The central piece 17 forced inward is pulled away from the concrete surface, and at the same time, the fastening pieces 50 engaged with the folding surfaces 38, 39 of the piece 17,
50 is pulled from the folding surface 25 of the upper and lower pieces 12, 14. Here, after the fastening pieces 50, 50 are completely separated from the sleeve 10, the central piece 17 is pulled out from the mold. After that, the upper and lower pieces 12 and 14 are separated from the concrete surface, respectively. If necessary, the burr is similarly inserted into the inclined ridge provided on the other central piece 16 to release the central piece 16 and the fastening pieces 50, 50. In this way, the sleeve 10 is separated from the concrete pouring surface for each constituent member, and a space for piping or a duct is formed later.

The sleeve 10 can be reused by reassembling it as described above. If it is necessary to use only the upper and lower pieces without using the central pieces 16 and 17, or if they are to be used for a large opening, as shown in FIG. You can also do it. Also, by changing the size (height) of the central piece 16, it can be used for openings of different sizes, or by using a combination of multiple sleeves, a small number of types of members can be used for openings of various sizes. can do. Further, the sleeve 10 may have a shape other than the rectangular shape shown in the drawing, for example, a sleeve having a circular shape, a rhombic shape, an oval shape or the like.

"Effect of the invention" Since each surface of the sleeve of the present invention is reinforced by a reinforcing material, etc., it can sufficiently withstand the compressive force of concrete,
Further, since each part is simply sandwiched by the fastening pieces, it is easy to assemble and disassemble, and moreover, it can be used many times, which is economical. Also, in consideration of the work of dismantling the formwork, initially 3
If you prepare sleeves for each floor, you can use them alternately to save the cost of box material and eliminate the need for box processing. Further, the sleeve is disassembled to be compact and convenient for transportation. The present invention can be effectively used not only for the opening of equipment such as ducts and piping but also for the construction of construction openings of concrete structures such as windows and inspection openings.

[Brief description of drawings]

1 is a perspective view of a sleeve according to the present invention, FIG. 2 is an exploded perspective view of the sleeve, FIG. 3 is a view showing another example of a fastening piece, and FIG. 4 is a partially enlarged view of FIG. FIG. 5 is a view showing a modification of FIG. 4, and FIG. 6 is a view showing an example in which four sleeves of FIG. 1 are combined. Explanation of reference numerals 10: sleeve, 12, 14: upper and lower pieces 16, 17: central piece, 20: bottom surface 22, 23: vertical surface, 24, 25: folding surface 26, 27: angle, 28, 30: reinforcing material 32: Reinforcing piece, 34: Nail hole 36, 37, 38, 39: Folding surface 40: Reinforcing material, 42: Inclined and raised portion 44: Auxiliary piece, 46: Nail hole 50: Fastening piece, 52: Edge portion

Claims (4)

[Scope of utility model registration request] 1. A pair of upper and lower pieces comprising a pair of upright surfaces 22, 24 and a bottom surface 20 connecting one edge of these upright surfaces 22, 23, the other of said upright surfaces 22, 23. Upper and lower pieces 12, 14 having folding surfaces 24, 25 projecting in opposite directions from the edge, and folding surfaces 36, 37, 38, 39 on both side edges, and the upper and lower pieces 12, 14. At least one pair of central piece 16 and 17 arranged between 14 and having an external force receiving means 42 on at least one central piece 17
6, 17 and folding surfaces 24, 25 of the upper and lower pieces 12, 14 and the central piece 1
A concrete driving sleeve comprising: a fastening piece 50 for fastening the folding surfaces 36, 37, 38, 39 of 6, 17; 2. The sleeve comprises pieces 12, 14, 16,
The concrete driving sleeve according to claim 1, which has auxiliary pieces 32, 44 for fixing the sleeve to a concrete panel at one end of the utility model. 3. The concrete driving sleeve according to claim 1 or 2, wherein the end edges 52 of the fastening piece 50 are bent outwardly from each other. 4. A utility model registration claim in which an external force receiving means 42 is provided on a reinforcing member 40 connecting the folding surfaces 38, 39 of the central portion piece 17 to claim 1 or 2 or 3. Sleeve for concrete driving.