JP2016156138A - Slab sleeve material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a slab sleeve material enabling an open hole to be easily formed at a predetermined position on a slab made of concrete and a deck plate.SOLUTION: A slab sleeve material 10A comprises: a hollow first sleeve material 11, which extends from a deck plate upward and is entirely embedded in concrete after the concrete is placed; and a second sleeve material 12, which is disposed above the first sleeve material 11. In a slab sleeve material 10A, the concrete is placed in the deck plate on which the slab sleeve material is installed, and the second sleeve material 12 is separated from the first sleeve material 11 after the concrete hardened. Thus, an open hole, which penetrates in a width direction of the slab, is formed on the slab.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a slab sleeve material used when a through hole is formed at a predetermined position of a slab made of concrete and the deck plate.

  A sleeve installation jig for installing a slab sleeve material used when forming a through hole in a floor slab on a deck plate before placing concrete is disclosed (see Patent Document 1). After the slab sleeve material is installed on the deck plate by the sleeve installation jig disclosed in Patent Document 1, concrete is placed on the deck plate. When concrete is placed on the deck plate, the substantially lower half of the slab sleeve material is buried in the concrete, and the substantially upper half of the slab sleeve material is exposed upward from the upper surface of the concrete. When the concrete is cured for a specified period and the concrete is hardened, when piping work for the through hole, remove the cap member, fixing member, lid member, rod-like member that forms the sleeve installation jig, and inside the slab sleeve material An opening for piping is formed in the deck plate.

JP 2012-167443 A

  The sleeve material for slab disclosed in the above-mentioned Patent Document 1 prevents the intrusion of rainwater into the through-hole during the frame construction because the sleeve material is exposed upward from the concrete when sleeve construction is performed using the sleeve material. However, if it is necessary to install a fire cap member for fire prevention compartment treatment, a heat-expandable heat-resistant seal, etc. in this through hole, the upper half of the sleeve material exposed upward from the concrete must be cut off. Therefore, it takes time and labor to perform the excision work, and the sleeve work cannot be efficiently performed in a short time. In addition, when cutting the upper half of the sleeve material for slabs, the sleeve material is cut using an electric cutter. Expensive and sleeve construction cannot be done at low cost. When cutting the sleeve material using an electric cutter, sparks are scattered in all directions, so the electric cutter cannot be used in places where fire is strictly prohibited, and the worker must cut the sleeve material manually with a gold saw. . Furthermore, in order to be able to attach a fireproof cap member for processing a fireproof section, the intersection of the upper surface of the slab and the inner wall surface of the through hole must be formed at a right angle, and each operation requires labor and time. The sleeve construction cannot be performed efficiently in a short time.

  An object of the present invention is to easily form a through-hole at a predetermined position of a slab made of concrete and a deck plate, and to perform a sleeve construction for the through-hole of the slab at any place including a fire-prohibited place. An object of the present invention is to provide a slab sleeve material that can be efficiently performed in a short time. The objective of this invention is providing the sleeve material for slabs which can perform sleeve construction inexpensively, reducing an operator.

  The premise of the present invention for solving the above-mentioned problem is that the slab is used when a through-hole is formed at a predetermined position of a slab made of concrete and a deck plate, which is installed on the deck plate before placing concrete. Sleeve material.

  According to the premise of the present invention, the slab sleeve material extends upward from the deck plate, and after placing the concrete, the hollow first sleeve material that is entirely buried in the concrete, and above the first sleeve material A lower end portion that is fixed to the deck plate by fixing means, and an upper end portion that is detachably connected to the second sleeve material by connecting means, An intermediate portion extending between the upper end portion and the lower end portion, and a second sleeve material is detachably connected to the upper end portion of the first sleeve material by a connecting means and is embedded in the concrete, and connected An exposed portion that extends upward from the lower end portion and is exposed upward from the upper surface of the concrete; and a lid portion that closes the upper end opening surrounded by the upper end edge of the exposed portion. In the steel material, concrete is placed on the deck plate on which it is installed, and after the concrete hardens, the second sleeve material is separated from the first sleeve material, so that a through-hole penetrating in the thickness direction is formed in the slab. It is to be formed.

  As an example of the present invention, the connecting means is a slip-preventing plate that extends downward from the inner peripheral surface of the lower end of the second sleeve member and contacts the inner peripheral surface of the first sleeve member. The shift stopper plates are arranged with a predetermined distance apart in the direction around the exposed lower end of the second sleeve material.

  Another example of the present invention is a waterproof tape adhered to the outer peripheral surface of the upper end portion of the first sleeve material and the outer peripheral surface of the lower end portion of the second sleeve material to which the connecting means are connected to each other. In the sleeve material for slab, the first sleeve material and the second sleeve material are connected in a state where the outer peripheral surface of the first sleeve material and the outer peripheral surface of the second sleeve material are flush with each other, and the upper end of the first sleeve material is connected. The gap between the portion and the connection lower end portion of the second sleeve material is closed by the water-stopping tape.

  As another example of the present invention, a grippable flange extending outward in the radial direction of the second sleeve material is formed at the upper end edge of the exposed portion of the second sleeve material.

  As another example of the present invention, a handle extending upward from the lid is attached to the lid of the second sleeve material.

  As another example of the present invention, in the slab sleeve material, when the concrete is placed on the deck plate on which the slab sleeve material is placed, the upper end portion of the first sleeve material and the connection lower end portion of the second sleeve material are made of concrete. Located near the bottom of the top surface.

  As another example of the present invention, in the sleeve material for slab, at least the first sleeve material of the first sleeve material and the second sleeve material is made of paper, and after the concrete is hardened, the first sleeve material is passed through the through hole. Is removed.

  As another example of the present invention, the first sleeve material and the second sleeve material are made of either metal or synthetic resin.

  According to the sleeve material for slabs of the present invention, after the concrete is cured for a predetermined period and the concrete is hardened, the connection between the first sleeve material and the second sleeve material is released, and the second sleeve material is used as the first sleeve material. Since the through-hole surrounded by the first sleeve material is formed in the slab by removing (separating) from the slab, the slab sleeve material according to the present invention is used to make the through-hole. A through-hole can be easily formed in a predetermined portion of the slab. In the slab sleeve material, the entire first sleeve material and the connecting lower end of the second sleeve material are buried in the concrete, and the exposed portion of the second sleeve material is exposed from the concrete, so that It is possible to prevent rainwater that has accumulated in the street from entering the downstairs. Since the first sleeve material is buried in the concrete when the first sleeve material and the second sleeve material are separated, the first sleeve material is not exposed upward from the upper surface of the concrete. When piping work for through-holes, unlike the sleeve material of the prior art, there is no need to cut the first sleeve material, and the labor and time required for cutting work can be saved, and the piping work can be efficiently performed in a short time. It can be carried out. Since the slab sleeve material does not need to cut out the first sleeve material, it is not necessary to arrange a worker to cut off the portion of the first sleeve material exposed upward from the slab in connection with the piping work. Compared with the arrangement, labor costs to be paid to workers can be saved, and sleeve construction can be performed at low cost. The slab sleeve material does not require the first sleeve material to be cut off, so there is no need to use an electric cutter and there is no fear of sparks. Since the first sleeve material does not need to be cut by a manual operation using a gold saw, sleeve construction using the sleeve material can be efficiently performed in a short time in places where fire is strictly prohibited. In the slab sleeve material, since the first sleeve material is closed by the lid portion of the second sleeve material, the construction site of the slab faces the outside, and from the placement of the concrete to the installation of the roof or wall of the building Even if it rains during the period, it is possible to prevent rain from entering the first and second sleeve members, and to prevent rain leakage (rain dripping) from the through hole to the downstairs. The sleeve material for the slab can be reused by re-connecting the second sleeve material removed from the first sleeve material located in the through hole of the slab to the other first sleeve material. Therefore, the second sleeve material is not wasted and material saving can be achieved. When piping work is performed on a slab through-hole formed using a conventional slab sleeve material, the through-hole is removed when the upper half of the sleeve material exposed upward from the concrete is cut as described above. In some cases, it is difficult to install various members such as a fireproof cap member for heat-resistant compartment processing and a heat-expandable heat-resistant seal in the through hole. However, when the through hole is made using the sleeve material for the slab of the present invention, the intersection of the upper surface of the slab and the inner wall surface of the through hole is formed at a right angle, and the intersection is damaged. No, each member for fire protection compartment processing can be installed easily and reliably.

  The connecting means is a shift stop plate that extends downward from the inner peripheral surface of the connection lower end portion of the second sleeve material and contacts the inner peripheral surface of the first sleeve material, and the shift stop plate is the lower connection end portion of the second sleeve material. The sleeve materials for slabs arranged at a predetermined distance in the circumferential direction of the first sleeve material come into contact with the inner peripheral surface of the first sleeve material by the slip-preventing plates inserted into the first sleeve material. Since the position of the connecting lower end portion of the second sleeve material with respect to the upper end portion is determined, the first sleeve material and the second sleeve material can be easily connected simply by inserting the shift stopper plate into the first sleeve material. In the sleeve material for slab, when the upper end portion of the first sleeve material and the connection lower end portion of the second sleeve material are connected, those shift prevention plates arranged in the circumferential direction of the second sleeve material are the inner periphery of the first sleeve material. Since the displacement of the second sleeve material in the radial direction with respect to the first sleeve material is prevented by the displacement prevention plate, the upper edge of the first sleeve material and the lower edge of the second sleeve material are brought into contact with each other. In this state, the connection between the first sleeve material and the second sleeve material can be reliably maintained. In the slab sleeve material, since the connection between the first sleeve material and the second sleeve material is maintained by the slip stopper plate, when the concrete is placed on the deck plate on which the slab sleeve material is installed, the concrete side pressure is reduced. Even if it acts on the second sleeve material, the second sleeve material does not move from the first sleeve material, and it is possible to prevent the second sleeve material from coming off from the first sleeve material during the placement of concrete.

  The connecting means is a waterproofing tape adhered to the outer peripheral surface of the upper end portion of the first sleeve material and the outer peripheral surface of the lower end portion of the second sleeve material to which the connecting means is connected. The first sleeve material and the second sleeve material are connected in a state where the outer peripheral surface of the two sleeve materials is flush with each other, and a gap between the upper end portion of the first sleeve material and the lower connection end portion of the second sleeve material. The slab sleeve material is closed by the water-stop tape, by sticking the water-stop tape to the outer peripheral surface of the upper end portion of the first sleeve material and the outer peripheral surface of the connection lower end portion of the second sleeve material, The first sleeve material and the second sleeve material can be connected, and the first sleeve material and the second sleeve material can be easily connected by using the water-stopping tape. In the slab sleeve material, the gap between the upper end portion of the first sleeve material and the connecting lower end portion of the second sleeve material is closed by the water-stopping tape. It is possible to prevent moisture and concrete from entering the inside of the first sleeve material and the second sleeve material, and it is possible to prevent moisture and concrete nose from dripping from the through holes.

  The slab sleeve material in which the grippable flange extending radially outward of the second sleeve material is formed at the upper end edge of the exposed portion of the second sleeve material is formed at the upper end edge of the exposed portion of the second sleeve material. The second sleeve material can be pulled up above the first sleeve material by gripping the flange, so that the concrete is placed on the deck plate on which the slab sleeve material is installed, and after the concrete has hardened, the first sleeve material When the second sleeve material is separated from the second sleeve material, the second sleeve material can be easily separated from the first sleeve material by using the flange of the second sleeve material. A through-hole can be easily formed in the slab using the formed slab sleeve material.

  The sleeve material for the slab in which the handle extending upward from the lid portion of the second sleeve material is attached to the lid portion is gripped by the handle attached to the lid portion of the second sleeve material, and the second sleeve material is used as the first sleeve. When the concrete is placed on the deck plate on which the slab sleeve material is installed and the concrete is hardened, the second sleeve is separated from the first sleeve material and the second sleeve material. The second sleeve material can be easily separated from the first sleeve material by using the handle of the material, and penetrates the slab using the sleeve material for the slab formed from the first sleeve material and the second sleeve material. Holes can be made easily.

  When concrete is placed on the deck plate on which the slab sleeve material is installed, the upper end portion of the first sleeve material and the lower connection end portion of the second sleeve material are located near the lower part of the upper surface of the concrete. Is, when the first sleeve material and the second sleeve material are separated after the concrete is hardened, the lower end of the connection of the second sleeve material is located near the lower surface of the concrete (directly below the upper surface), The second sleeve material can be easily pulled out from the concrete, and the first sleeve material and the second sleeve material can be easily separated. Since the second sleeve material can be easily removed from the first sleeve material, the slab sleeve material can easily form a through-hole at a predetermined portion of the slab by using the slab sleeve material according to the present invention. can do.

  The slab sleeve material in which at least the first sleeve material of the first sleeve material and the second sleeve material is made of paper and the first sleeve material made of paper is removed from the through hole after the concrete has hardened is the first sleeve material. Since the sleeve material is made of paper, the first sleeve material separated from the second sleeve material and remaining in the through hole can be easily removed from the through hole, and the first sleeve material is not left in the through hole. Can respond. By making the first sleeve material and the second sleeve material from paper, the first sleeve material and the second sleeve material can be made inexpensively. As a result, the slab sleeve material can be made inexpensively. Can be made. When the first and second sleeve materials are made of cardboard having considerable strength, the first sleeve material and the second sleeve material are applied to the side pressure of the concrete when the concrete is placed on the deck plate. Can sufficiently withstand, and inadvertent deformation of the first and second sleeve materials when concrete is placed can be prevented.

  In the slab sleeve material in which the first sleeve material and the second sleeve material are made of either metal or synthetic resin, the first sleeve material and the second sleeve material are made of metal or synthetic resin. Since the strength of the 1 sleeve material and the second sleeve material can be secured, the first sleeve material and the second sleeve material can sufficiently withstand the lateral pressure of the concrete when the concrete is placed on the deck plate, and the concrete Inadvertent deformation of the first and second sleeve materials can be prevented. Since the sleeve material for the slab can prevent the deformation of the first sleeve material and the second sleeve material, a through-hole having a predetermined opening size as designed for piping work is formed at a predetermined portion of the slab. Can do. When the second sleeve material is made of either metal or synthetic resin, the second sleeve material removed from the first sleeve material located in the through hole of the slab is replaced with the other first sleeve. By reconnecting to the material, the second sleeve material can be reused any number of times, so that the second sleeve material is not wasted and material saving can be achieved.

The perspective view of the sleeve material for slabs shown as an example. The side view of the sleeve material for slabs of FIG. The perspective view of the 1st sleeve material shown as an example. The side view of the 1st sleeve material of FIG. The perspective view of the 2nd sleeve material shown as an example. The side view of the 2nd sleeve material of FIG. The perspective view of the sleeve material for slabs installed in the deck plate. The perspective view of the sleeve material for slabs after placing concrete. The side view of the sleeve material for slabs after placing concrete. The side view of the sleeve material for slabs when separating a 1st sleeve material and a 2nd sleeve material. The side view of the through-hole formed in the slab. The side view of the sleeve material for slabs shown as another example. The side view of the 2nd sleeve material shown as another example.

  The details of the slab sleeve material according to the present invention will be described below with reference to the accompanying drawings such as FIG. 1 which is a perspective view of the slab sleeve material 10A shown as an example. 2 is a side view of the slab sleeve material 10A of FIG. 1, and FIG. 3 is a perspective view of the first sleeve material 11 shown as an example. 4 is a side view of the first sleeve material 11 of FIG. 3, and FIG. 5 is a perspective view of the second sleeve material 12 shown as an example. 6 is a side view of the second sleeve member 12 of FIG. In FIG. 1, the vertical direction is indicated by an arrow A, the radial direction is indicated by an arrow B, and the surrounding direction is indicated by an arrow C.

  The slab sleeve material 10A is installed (fixed) on the upper surface 41 of the deck plate 35 (see FIG. 7) before placing the concrete 36, and the slab 38 (concrete slab) made from the concrete 36 and the deck plate 35 is placed. This is used when a through-hole 37 (circular pipe cavity) is formed at a predetermined location. The slab sleeve material 10 </ b> A is formed of a hollow first sleeve material 11 and a second sleeve material 12 disposed above the first sleeve material 11.

  As shown in FIGS. 3 and 4, the first sleeve material 11 includes a peripheral wall 13 that is formed in a cylindrical shape (true cylinder) and extends in the vertical direction. The peripheral wall 13 has a circular cross-sectional shape, and includes a lower end portion 14 and an upper end portion 16, and an intermediate portion 15 extending between the upper and lower end portions 14 and 16. The length dimension L1 in the vertical direction of the first sleeve material 11 is determined according to the design thickness dimension of the slab 38 to be constructed, and the length dimension L1 = (design thickness dimension (mm) of the slab 38−L8 (mm) described later. )).

  The first sleeve material 11 is made of either metal, synthetic resin (thermoplastic synthetic resin) or paper (paper sleeve). One sleeve material made of metal, synthetic resin, or paper that is long in one direction is cut to divide the sleeve material into two or more to make the first sleeve material 11 and the second sleeve material 12. be able to.

  The lower end portion 14 of the peripheral wall 13 of the first sleeve material 11 is fixed to the deck plate 35 by fixing means (a fixing member 17 and a gum tape 40 described later). The upper end portion 16 of the peripheral wall 13 of the first sleeve member 11 is detachably connected to the second sleeve member 12 by connecting means (a slip stopper plate 29 and a water stop tape 34 described later). In addition, the 1st sleeve material 11 may be shape | molded by the square cylinder shape, and the cross-sectional shape may be a square. When the first sleeve member 11 having a rectangular tube shape is used, a square through hole 37 (a square cavity for piping) is formed at a predetermined position of the slab 38.

  Four L-shaped fixing members 17 (fixed angles) (fixing means) are attached to the outer peripheral surface of the lower end portion 14 of the peripheral wall 13 of the first sleeve material 11. The fixing members 17 are arranged with a predetermined distance apart (equally spaced apart by 90 degrees in the circumferential direction) around the lower end portion 14 of the first sleeve material 11. The fixing member 17 extends in parallel with the peripheral wall 13 of the first sleeve member 11 and is connected (fixed) to the peripheral wall 13, and is bent at a substantially right angle with respect to the first connecting plate 18. 1 has a second connecting plate 19 that extends in the radial direction of the sleeve material 11 and is connected (fixed) to the deck plate 35. The second connecting plate 19 has a hole 20 into which a screw 39 (screw) is screwed.

  The length dimension L2 of the first connecting plate 18 of the fixing member 17 is preferably in the range of 20 to 30 mm, and the length dimension L3 of the second connecting plate 19 is preferably in the range of 30 to 40 mm. It is preferable that the width dimension L4 of the 1st and 2nd connection plates 18 and 19 exists in the range of 15-20 mm. The length dimensions L2 and L3 and the width dimension L4 of the first and second connecting plates 18 and 19 are not particularly limited, and the length dimensions L2 and L3 and the width dimension L4 are matched to the size of the first sleeve material 11. Is determined. The number of fixing members 17 is not particularly limited, and three or five or more fixing members 17 may be attached to the lower end portion 14 of the first sleeve material 11.

  When the first sleeve material 11 is made of metal, the fixing member 17 is preferably made of the same material as the first sleeve material 11, and the first connecting plate 18 of the metal fixing member 17 is used. Is fixed to the outer peripheral surface of the peripheral wall 13 of the first sleeve member 11 by welding. When the first sleeve material 11 is made of synthetic resin, the fixing member 17 is preferably made of the same synthetic resin as the first sleeve material 11, and the first connecting plate of the fixing member 17 made of synthetic resin. 18 is fixed to the outer peripheral surface of the peripheral wall 13 of the first sleeve member 11 by an adhesive or heat fusion.

  When the first sleeve member 11 and the fixing member 17 are made of metal or synthetic resin, a hole (not shown) drilled in the first connecting plate 18 and a hole drilled in the peripheral wall 13 of the first sleeve member 11. The first connecting plate 18 of the fixing member 17 made of metal or synthetic resin is connected to the peripheral wall 13 of the first sleeve member 11 by a rivet (not shown) or a screw (not shown) inserted into the notch. It is fixed to the outer peripheral surface.

  When the first sleeve member 11 is made of paper, the fixing member 17 is made of metal or synthetic resin, and the first connecting plate 18 of the fixing member 17 made of metal or synthetic resin is the peripheral wall of the first sleeve member 11. The outer peripheral surface of 13 is fixed with an adhesive.

  As shown in FIGS. 5 and 6, the second sleeve member 12 includes a circumferential wall 21 formed in a cylindrical shape (true cylinder) and extending in the vertical direction, and a top wall extending in the radial direction formed in a disk shape (true circle). 22. The peripheral wall 21 has a circular cross-sectional shape, and has a connecting lower end portion 23, an exposed intermediate portion 24 (exposed portion), and an exposed upper end portion 25 (exposed portion). The top wall 22 has a circular planar shape, and defines a lid portion 26 that closes the upper end opening surrounded by the upper end edge of the exposed upper end portion 25 (circumferential wall 21).

  The length dimension L5 in the vertical direction of the second sleeve material 12 is preferably in the range of 100 to 150 mm, but the length dimension L5 of the second sleeve material 12 is not particularly limited, and the length of the first sleeve material 11 is not limited. The length dimension L5 of the second sleeve material 12 is determined according to the dimension L1. The diameter of the second sleeve material 12 (the peripheral wall 21) is the same as that of the first sleeve material 11 (the peripheral wall 13).

  The second sleeve material 12 is made of either metal, synthetic resin (thermoplastic synthetic resin) or paper (paper sleeve). The material (material) of the second sleeve material 12 does not need to be the same as that of the first sleeve material 11, but the first sleeve material 11 and the second sleeve material 12 are made of the same material. Is preferred. Moreover, when the surrounding wall 13 of the 1st sleeve material 11 is shape | molded by the square tube shape, the surrounding wall 21 of the 2nd sleeve material 12 is also shape | molded by the square tube shape.

  The top wall 22 (lid portion 26) of the second sleeve material 12 is caulked against the exposed upper end portion 28 so that the outer peripheral edge portion 27 is in close contact with the exposed upper end portion 28 of the peripheral wall 21. Is firmly fixed to the exposed upper end 28. When the second sleeve material 11 is made of metal, the outer peripheral edge 27 of the top wall 22 (lid part 26) may be fixed to the exposed upper end 28 of the peripheral wall 21 by welding. When the second sleeve material 12 is made of synthetic resin, the outer peripheral edge 27 of the top wall 22 (lid part 26) is fixed to the exposed upper end 28 of the peripheral wall 21 by an adhesive or heat fusion. Also good. Furthermore, when the second sleeve material 12 is made of paper, the outer peripheral edge 27 of the top wall 22 (lid 26) may be fixed to the exposed upper end 28 of the peripheral wall 21 with an adhesive.

  At the upper end edge of the exposed upper end portion 28 of the second sleeve material 12, a grippable flange 28 is formed that extends in the entire region around the second sleeve material 12 and extends radially outward. The flange 28 is defined by an outer peripheral edge portion 27 of the top wall 22 (lid portion 26) extending outward in the radial direction of the second sleeve material 12.

  Four shift stopper plates 29 (shift stopper plates) (connecting means) are attached to the inner peripheral surface of the connecting lower end 23 of the peripheral wall 21 of the second sleeve member 12. The misalignment stop plates 29 are arranged with a predetermined distance apart (equally spaced apart by 90 degrees in the circumferential direction) around the connecting lower end 23 of the second sleeve material 12.

  The misalignment stop plate 29 extends in parallel with the peripheral wall 21 of the second sleeve material 12 and is connected (fixed) to the peripheral wall 21 and is connected to the connection plate 30 and connected to the lower end of the second sleeve material 12. And an insertion plate 32 extending downward from the lower end edge 31 of the 23 (exposed downward from the lower end edge 31 of the connecting lower end portion 23).

  The vertical dimension L6 of the connecting plate 30 and the insertion plate 32 of the misalignment stop plate 29 is in the range of 20 to 30 mm, and the width dimension L7 of the connecting plate 30 and the insertion plate 32 is in the range of 15 to 20 mm. It is preferable. The length L6 and the width L7 of the connecting plate 30 and the insertion plate 32 are not particularly limited, and the length L6 and the width L7 are set according to the size of the first and second sleeve materials 11 and 12, respectively. It is determined. Further, the number of the shift stopper plates 29 is not particularly limited, and three or five or more shift stopper plates 29 may be attached to the connection lower end portion 23 of the second sleeve material 12.

  When the second sleeve member 12 is made of metal, the displacement stopper plate 29 is preferably made of the same material as the second sleeve member 12, and the connecting plate 30 of the metal stopper plate 29 is made of metal. Is fixed to the inner peripheral surface of the peripheral wall 21 of the second sleeve member 12 by welding. When the second sleeve material 12 is made of a synthetic resin, the displacement stopper plate 29 is preferably made of the same synthetic resin as the second sleeve material 12, and the connecting plate for the displacement stopper plate 29 made of synthetic resin. 30 is fixed to the inner peripheral surface of the peripheral wall 21 of the second sleeve member 12 by an adhesive or heat fusion.

  When the second sleeve member 12 and the displacement stopper plate 29 are made of metal or synthetic resin, a hole (not shown) drilled in the connecting plate 30 and a hole drilled in the peripheral wall 21 of the second sleeve member 12 (not shown). The connecting plate 30 of the shift stopper plate 29 made of metal or synthetic resin is connected to the inside of the peripheral wall 21 of the second sleeve member 12 by a rivet (not shown) or a screw (not shown) inserted into the second sleeve member 12. Fixed to the peripheral surface.

  When the second sleeve member 12 is made of paper, the shift stopper plate 29 is made of metal, synthetic resin, or paper, and the connecting plate 30 of the metal, synthetic resin, or paper shift stopper plate 29 is the second. The sleeve member 12 is fixed to the inner peripheral surface of the peripheral wall 21 with an adhesive.

  When the first sleeve material 11 and the second sleeve material 12 are made of paper, a tool such as a gold saw or a bar is not used when removing the first sleeve material 11 from the through hole 37 after the concrete 36 is hardened. The first sleeve material 11 can be removed. When the first sleeve material 11 and the second sleeve material 12 are made of either a metal that is not easily rusted, a metal that has been subjected to a rust prevention treatment, or a synthetic resin, the rust in the first and second sleeve materials 11 and 12 Can be prevented.

  The assembly procedure of the first sleeve material 11 and the second sleeve material 12 in the slab sleeve material 10A is as follows. The second sleeve material 12 is disposed on the first sleeve material 11, and the insertion plate 32 of the shift stopper plate 29 of the second sleeve material 12 is inserted (inserted) into the first sleeve material 11. When the insertion plate 32 of the misalignment stop plate 29 is inserted inside the first sleeve material 11, the insertion plate 32 comes into contact with the inner peripheral surface of the peripheral wall 13 of the first sleeve material 11, and the upper end of the first sleeve material 11. The position of the connecting lower end 23 of the second sleeve material 12 with respect to the portion 16 is determined, the first sleeve material 11 is located below the second sleeve material 12, and the second sleeve material 12 is located above the first sleeve material 11. In this state, the first sleeve material 11 and the second sleeve material 12 are connected in the vertical direction.

  When the insertion plate 32 is inserted into the first sleeve material 11 and the first and second sleeve materials 11 and 12 are connected, the upper edge 33 of the upper end portion 16 of the first sleeve material 11 and the second sleeve material 12 are connected. The first sleeve member 11 and the second sleeve are in contact with the lower end edge 31 of the lower end portion 23 and the outer peripheral surface of the first sleeve member 11 and the outer peripheral surface of the second sleeve member 12 are flush with each other. The material 12 is lined up and down.

  The slab sleeve material 10 </ b> A is configured so that the insertion plate 32 of the slip prevention plate 29 inserted into the first sleeve material 11 comes into contact with the inner peripheral surface of the first sleeve material 11, whereby the upper end portion 16 of the first sleeve material 11. Since the position of the connecting lower end portion 23 of the second sleeve material 12 with respect to the first sleeve material 11 is simply inserted into the first sleeve material 11, the first sleeve material 11 and the second sleeve material 12 Can be easily connected.

  The slab sleeve material 10 </ b> A is configured to prevent the misalignment plates 29 arranged in the circumferential direction of the second sleeve material 12 when the upper end portion 16 of the first sleeve material 11 and the connection lower end portion 23 of the second sleeve material 12 are connected. Since the insertion plate 32 abuts on the inner peripheral surface of the first sleeve material 11 and the radial displacement of the second sleeve material 12 with respect to the first sleeve material 11 is prevented by the displacement prevention plate 29, the first sleeve The connection between the first sleeve material 11 and the second sleeve material 12 can be reliably maintained in a state where the upper end edge 33 of the material 11 and the lower end edge 31 of the second sleeve material 12 are in contact with each other.

  After the first and second sleeve members 11 and 12 are connected, the waterproof tape is applied to the outer peripheral surface of the upper end portion 16 of the first sleeve member 11 and the outer peripheral surface of the lower end portion 23 of the second sleeve member 12 connected to each other. Adhere 34 (waterproof tape). In the slab sleeve material 10 </ b> A, the insertion plate 32 (connecting means) of the slip prevention plate 29 that contacts the inner peripheral surface of the peripheral wall 13 of the first sleeve material 11 and the first and second sleeve materials 11, 12 are arranged in the circumferential direction. The first and second sleeve members 11 and 12 are detachably connected to the extending water stop tape 34 (connecting means). Note that a gap between the upper end edge 33 of the upper end portion 16 of the first sleeve material 11 and the lower end edge 31 of the connection lower end portion 23 of the second sleeve material 12 is closed by the waterproof tape 34.

  The slab sleeve material 10 </ b> A is formed by sticking a waterproof tape 34 to the outer peripheral surface of the upper end portion 16 of the first sleeve material 11 and the outer peripheral surface of the connecting lower end portion 23 of the second sleeve material 12. 11 and the second sleeve material 12 can be connected, and the first sleeve material 11 and the second sleeve material 12 can be easily connected by using the water blocking tape 34.

  The displacement stopper plate 29 is preferably attached to the second sleeve member 12, but the displacement stopper plate 29 may not be attached to the second sleeve member 12. In this case, the first sleeve material 11 and the second sleeve material 12 are arranged such that the upper end edge 33 of the upper end portion 16 of the first sleeve material 11 and the lower end edge 31 of the connection lower end portion 23 of the second sleeve material 12 come into contact with each other. Are arranged in the vertical direction, and a waterproof tape 34 is attached to the outer peripheral surface of the upper end portion 16 of the first sleeve material 11 and the outer peripheral surface of the connecting lower end portion 23 of the second sleeve material 12. And the connection of the 2nd sleeve materials 11 and 12 is maintained.

  FIG. 7 is a perspective view of the slab sleeve material 10 </ b> A installed on the deck plate 35, and FIG. 8 is a perspective view of the slab sleeve material 10 </ b> A after placing the concrete 36. 9 is a side view of the slab sleeve material 10A after placing the concrete 36. FIG. 10 shows the slab sleeve material 10A when the first sleeve material 11 and the second sleeve material 12 are separated. It is a side view. FIG. 11 is a side view of the through hole 37 formed in the slab 38.

  In FIG. 8, illustration of the fixing member 17, the misalignment stop plate 29, and the deck plate 35 is omitted. 9, 10, and 11, the concrete 36 is shown in cross section. In these drawings, illustration of reinforcing bars arranged on the upper surface 41 of the deck plate 35 is omitted. In FIG. 8 to FIG. 11, illustration of the gum tape 40 attached to the first sleeve material 11 and the deck plate 35 is omitted. In these figures, one slab sleeve material 10A is installed on the deck plate 35, but actually, a plurality of slab sleeve materials 10A are installed on the deck plate 35 in a state where they are arranged in a predetermined direction. Is done.

  The procedure for forming the through hole 37 at a predetermined location of the slab 38 using the slab sleeve material 10A is as follows. The slab sleeve material 10 </ b> A is placed at a position corresponding to the through hole forming portion of the upper surface 41 of the deck plate 35. When the reinforcing bar is placed on the deck plate 35 and the slab sleeve material 10A is installed on the deck plate 35, or when the reinforcing bar is placed on the deck plate 35 and the slab sleeve material 10A is installed on the deck plate 35. The reinforcing bar is arranged on the deck plate 35 so that the reinforcing bar is not positioned at the installation position of the slab sleeve material 10A by transmitting the position of the slab sleeve material 10A to the reinforcing bar in advance.

  When the slab sleeve member 10 </ b> A is placed on the deck plate 35, the second connecting plate 19 of the fixing member 17 fixed to the lower end portion 14 of the peripheral wall 13 of the first sleeve member 11 extends in parallel with the deck plate 35. . A hole (not shown) for screwing a screw 39 into the deck plate 35 corresponding to the hole 20 drilled in the second connecting plate 19 of the fixing member 17 is drilled, and a screw is inserted into the hole 20 of the second connecting plate 19. The screw 39 is screwed and the screw 39 is screwed into the hole of the deck plate 35. By screwing screws 39 into the holes 20 of the second connecting plate 19 and the holes of the deck plate 35, the slab sleeve material 10 </ b> A is installed and fixed to the deck plate 35 by the screws 39.

  As another method of fixing the slab sleeve material 10 </ b> A to the deck plate 35 with screws 39, a gummed tape is applied to the lower end portion 14 (including the fixing member 17) of the peripheral wall 13 of the first sleeve material 11 and the upper surface 41 of the deck plate 35. Apply 40 (fixed tape). The slab sleeve material 10 </ b> A is fixed to the deck plate 35 by the gum tape 40 extending in the direction around the first sleeve material 11. The gum tape 40 is stuck so as to overlap in the direction around the first sleeve material 11. In addition to the gummed tape 40, a waterproof tape (waterproof tape) may be attached.

  Although three or more fixing members 17 are preferably attached to the first sleeve material 11, the fixing members 17 may not be attached to the first sleeve material 11. In this case, the gum tape 40 is attached to the lower end portion 14 of the peripheral wall 13 of the first sleeve material 11 and the upper surface 41 of the deck plate 35, and the slab sleeve material 10 </ b> A is fixed to the deck plate 35 with the gum tape 40. Note that at least one of the first sleeve material 11 and the second sleeve material 12 of the slab sleeve material 10A and a reinforcing bar (not shown) may be connected by a binding wire (wire) to fix the slab sleeve material 10A to the reinforcing bar. it can.

  After the slab sleeve material 10 </ b> A is installed (fixed) on the deck plate 35, the concrete 36 is placed on the upper surface 41 of the deck plate 35. When the concrete 36 is placed on the deck plate 35, as shown in FIG. 8, the entire first sleeve material 11 (including the fixing member 17) is buried in the concrete 36 and the connection lower end 23 of the second sleeve material 12. Is buried in the concrete 36. The exposed intermediate portion 24 and the exposed upper end portion 25 (including the lid portion 26) of the second sleeve material 12 are exposed upward from the upper surface 43 of the concrete 36.

  When the first and second sleeve materials 11 and 12 are made of metal or synthetic resin or cardboard having a considerable strength, the strength of the first sleeve material 11 and the second sleeve material 12 can be secured. Even if the side pressure of the concrete 36 when the concrete 36 is placed on the deck plate 35 acts on the connection lower end portion 23 of the first sleeve material 11 or the second sleeve material 12, the first sleeve material 11 or The second sleeve material 12 can sufficiently withstand, and inadvertent deformation of the first and second sleeve materials 11 and 12 when the concrete 36 is placed can be prevented.

  When the concrete 36 is placed on the deck plate 35 on which the slab sleeve material 10 </ b> A is installed, the upper end portion 16 of the first sleeve material 11 and the connecting lower end portion 23 of the second sleeve material 12 are near the lower side of the upper surface 43 of the concrete 36 ( Located directly below). In the connection lower end portion 23 of the second sleeve material 12 buried in the concrete 36, the vertical dimension L8 from the upper surface 43 of the concrete 36 to the lower end edge 31 of the connection lower end portion 23 is in the range of 10 to 30 mm. The dimension L8 is preferably about 20 mm.

  At the time of placing the concrete 36, the thickness of the concrete 36 (slab 38) is uneven or the surface shape is uneven. However, by providing the dimension L8, the connecting lower end 23 of the second sleeve material 12 is connected to the concrete. 36, the rainwater on the slab 38 can be prevented from entering the slab sleeve material 10A. Further, the exposure of the first sleeve material 11 to the upper surface 43 of the slab 38 can be prevented. After placing the concrete 36 on the deck plate 35, the concrete 36 is cured by curing the concrete 36.

  In the slab sleeve material 10A, since the connection between the first sleeve material 11 and the second sleeve material 12 is maintained by the misalignment stop plate 29, concrete 36 is placed on the deck plate 35 on which the slab sleeve material 10A is installed. Sometimes, even if the side pressure of the concrete 36 acts on the connecting lower end 23 of the second sleeve material 12, the second sleeve material 12 does not move relative to the first sleeve material 11, and the concrete 36 is being placed. The second sleeve material 12 can be prevented from coming off from the first sleeve material 11.

  In the slab sleeve material 10 </ b> A, the gap between the upper end edge 33 of the upper end portion 16 of the first sleeve material 11 and the lower end edge 31 of the connection lower end portion 23 of the second sleeve material 12 is closed by the water stop tape 34. After the concrete 36 is placed on the deck plate 35, it is possible to prevent moisture and noxious penetration of the concrete 36 from the gap into the first sleeve material 11 and the second sleeve material 12. In addition, when the concrete 36 penetrates, irregularities may be formed in the through hole 37 by the nose, but since no penetration penetrates, the smooth wall through-hole 37 can be formed. .

  Since the gap between the lower end portion 14 of the first sleeve material 11 and the upper surface 41 of the deck plate 35 is closed by the gum tape 40, the slab sleeve material 10A is placed after the concrete 36 is placed on the deck plate 35. When the deck plate 35 extending to the inside of the first sleeve material 11 is cut off, it is possible to prevent moisture and concrete 36 from entering the first sleeve material 11 and the second sleeve material 12 from the gap. It is possible to prevent moisture and concrete 36 from dropping from 37 to the lower floor.

  In the slab sleeve material 10A, since the first sleeve material 11 is closed by the lid portion 26 (top wall 22) of the second sleeve material 12, the construction site of the slab 38 faces the outside and the concrete 36 is placed. Even if it rains during the period until the roof and walls of the building are installed, it is possible to prevent rain from entering the first and second sleeve members 11 and 12 and to go down through the through hole 37. Can prevent rain leakage (rain dripping).

  After the concrete 36 is hardened, the connection between the first sleeve material 11 and the second sleeve material 12 is released as shown in FIG. While holding the flange 28 formed on the exposed upper end portion 25 of the second sleeve material 12 and twisting the second sleeve material 12, the second sleeve material 12 is attached to the first sleeve material 11 as shown by arrows in FIG. Pull up.

  When the second sleeve material 12 is pulled up, the connection between the first sleeve material 11 and the second sleeve material 12 is released, and the second sleeve material 12 is removed (separated) from the first sleeve material 11 and the second sleeve material 12 is removed. The connecting lower end 23 of the sleeve material 12 is pulled out from the hardened concrete 36. When the second sleeve member 12 is pulled out from the concrete 36, if the dimension L8 is larger than necessary, it is difficult to pull out the second sleeve member 12. Therefore, the dimension L8 is set to a range of 10 to 30 mm. By separating the second sleeve material 12 from the first sleeve material 11, a through hole 37 penetrating in the thickness direction is formed in the slab 38.

  When the second sleeve material 12 is separated from the first sleeve material 11, the concrete 36 becomes the through hole 37 by a dimension L 8 from the upper edge 33 of the first sleeve material 11 to the upper surface 43 of the slab 38 (upper surface of the concrete 36). Exposed. In the through hole 37, the upper surface 43 of the slab 38 and the inner wall surface 44 of the through hole 37 intersect at a right angle, and an intersection 45 between the upper surface 43 of the slab 38 and the inner wall surface 44 of the through hole 37 is formed at a right angle.

  When the 1st sleeve material 11 is made from a metal or a synthetic resin, the 1st sleeve material 11 which exists in the through-hole 37 is left as it is. When the first sleeve material 11 is made of paper, the first sleeve material 11 present in the through hole 37 may be left as it is, but the first sleeve material 11 present in the through hole 37 is not through the through hole. It may be removed from 37.

  After the second sleeve material 12 is separated from the first sleeve material 11 and a through hole 37 is formed at a predetermined position of the slab 38, although not shown, piping work using the through hole 37 is performed. . In the piping work, the deck plate 35 extending to the inside (through hole 37) of the slab sleeve material 10A (first sleeve material 11) is cut out, and the piping is passed from the upper floor to the lower floor by passing the piping through the through hole 37 of the slab 38. Pull to the upper floor from the lower floor. After passing the pipe through the through-hole 37, although not shown in the figure, the through-hole 37 is provided with various members such as a fireproof cap member for heat-resistant compartment processing and a thermally expandable heat-resistant seal.

  In the slab sleeve material 10A, after the concrete 36 placed on the deck plate 35 is hardened, the connection between the first sleeve material 11 and the second sleeve material 12 is released, and the second sleeve material 12 is removed from the first sleeve material 11. Since the through-hole 37 surrounded by the first sleeve material 11 is formed in the slab 38 by removing (separating) from the slab, it is made from the concrete 36 and the deck plate 35 by using the slab sleeve material 10A. The through hole 37 can be easily formed at a predetermined location of the slab 38 formed. Since the slab sleeve material 10A can prevent inadvertent deformation of the first and second sleeve materials 11 and 12 due to the side pressure of the concrete 36, the slab sleeve material 10A has a design as required for piping work at a predetermined location of the slab 38. A through hole having an opening dimension can be formed.

  In the slab sleeve material 10A, when the first sleeve material 11 and the second sleeve material 12 are separated, the first sleeve material 11 is buried in the concrete 36, and the first sleeve material 11 is located above the upper surface 43 of the concrete 36. When the piping work for the through-hole 37 is performed, it is not necessary to cut the first sleeve material 11 unlike the conventional sleeve material, and the labor and time required for the cutting work can be saved. The piping work can be performed efficiently in a short time.

  Since it is not necessary to cut the first sleeve material 11 in the piping work, the slab sleeve material 10A arranges a special worker who cuts the portion of the first sleeve material 11 exposed upward from the slab in accordance with the piping work. There is no need, and labor costs to be paid to the workers can be saved and piping work can be carried out at a lower cost compared with the case where workers are arranged. Since the slab sleeve material 10A does not require the first sleeve material to be excised, there is no need to use an electric cutter, and there is no fear of sparks scattered, so piping using the slab sleeve material 10A in a place where fire is strictly prohibited Since the construction can be performed and it is not necessary to cut the first sleeve material 11 manually by a gold saw, the sleeve construction using the sleeve material 10A can be efficiently performed in a short time in a place where the fire is strictly prohibited. .

  In the slab sleeve material 10A, the entire first sleeve material 11 and the connecting lower end 23 of the second sleeve material 12 are embedded in the concrete 36, and the exposed intermediate portion 24 and the exposed upper end of the second sleeve material 12 are embedded. Since the portion 25 is exposed from the concrete 36, it is possible to prevent the rainwater accumulated on the slab 38 from entering the downstairs. In the slab sleeve material 10A, since the first sleeve material 11 is closed by the lid portion 26 of the second sleeve material 12, the construction site of the slab 38 faces the outside, and the concrete 36 is placed from the roof or wall of the building. Even if it rains during the period until it is installed, it is possible to prevent rain from entering the first and second sleeve members 11, 12, and rain leaks from the through hole 37 to the downstairs (rain dripping). ) Can be prevented.

  When the second sleeve material 12 is made of either metal or synthetic resin, the second sleeve material 12 removed from the first sleeve material 11 located in the through hole 37 of the slab 38 is used. Since the second sleeve material 12 can be reused any number of times by reconnecting to the other first sleeve material 11, the second sleeve material 12 is not wasted and material saving is achieved. Can do. When the first sleeve material 11 is made of paper, the slab sleeve material 10 </ b> A can easily remove the first sleeve material 11 remaining in the through hole 37 from the through hole 37. It is possible to meet the demand not to leave the sleeve material 11.

  When piping work is performed on a slab through-hole formed using a conventional slab sleeve material, the through-hole is removed when the upper half of the sleeve material exposed upward from the concrete is cut as described above. The upper part of the slab may be damaged, and it may be difficult to install each member such as a fire-resistant cap member for heat-resistant compartment processing and a heat-expandable heat-resistant seal in the through hole. When the through-hole 37 is made by using, the intersection 45 between the upper surface 43 of the slab 38 and the inner wall surface 44 of the through-hole 37 is formed at a right angle, and the intersection 45 is not damaged, and fire-proofing treatment Each member can be installed easily and reliably.

  FIG. 12 is a side view of a slab sleeve material 10B shown as another example, and FIG. 13 is a side view of the second sleeve material 12 shown as another example. The slab sleeve material 10B is different from that shown in FIG. 1 in that a handle 42 is attached to the lid portion 28 (top wall 22) of the second sleeve material 12, and the other configuration is the slab sleeve shown in FIG. Since it is the same as those of the material 10A, the same reference numerals as those of the slab sleeve material 10A in FIG. 1 are used, and the description of the slab sleeve material 10A in FIG. The detailed description of is omitted.

  The slab sleeve material 10B was installed (fixed) on the upper surface 41 of the deck plate 35 (supported in FIG. 7) before placing the concrete 36, and was made from the concrete 36 and the deck plate 36, as in FIG. This is used when the through hole 37 is formed at a predetermined location of the slab 38. The slab sleeve material 10 </ b> B is formed of a hollow first sleeve material 11 and a second sleeve material 12 disposed above the first sleeve material 11. The first sleeve material 11 is the same as that of the slab sleeve material 10A of FIG.

  A U-shaped handle 42 extending upward from the lid portion 26 is attached to the lid portion 26 of the second sleeve material 12. When the second sleeve material 12 is made of metal, the handle 42 is also made of metal. When the second sleeve material 12 is made of synthetic resin, the handle 42 is also made of synthetic resin. When the second sleeve member 12 is made of paper, the handle 42 is made of metal, synthetic resin, or paper. The other structure of the second sleeve member 12 is the same as that of the slab sleeve member 10A of FIG.

  The procedure for creating the slab sleeve material 10B is the same as that of the slab sleeve material 10A of FIG. The procedure for forming the through-hole 37 at a predetermined position of the slab 38 using the slab sleeve material 10B is substantially the same as that of the slab sleeve material 10A of FIG. The handle 42 attached to the lid portion 26 of the sleeve material 12 is gripped, and the second sleeve material 12 is pulled up above the first sleeve material 11 while twisting the second sleeve material 12.

  When the second sleeve material 12 is pulled up using the handle 42, the connection between the first sleeve material 11 and the second sleeve material 12 is released, and the second sleeve material 12 is removed from the first sleeve material 11 (separation). And the second sleeve material 12 is pulled out from the concrete 36. By separating the second sleeve material 12 from the first sleeve material 11, a through hole 37 penetrating in the thickness direction is formed in the slab 38 (see FIG. 11).

  The slab sleeve material 10B has the same effect as the slab sleeve material 10A of FIG. The slab sleeve material 10B can hold the handle 42 attached to the lid portion 26 of the second sleeve material 12 and pull the second sleeve material 12 upward from the first sleeve material 11. When the concrete 36 is placed on the deck plate 35 on which the sleeve material 10B is installed and the first sleeve material 11 and the second sleeve material 12 are separated after the concrete 36 is hardened, the handle 42 of the second sleeve material 12 is removed. The second sleeve material 12 can be easily separated from the first sleeve material 11 by using the slab 38 using the slab sleeve material 10B formed from the first sleeve material 11 and the second sleeve material 12. The through-hole 37 can be easily made.

DESCRIPTION OF SYMBOLS 10A Sleeve material for slabs 10B Sleeve material for slabs 11 First sleeve material 12 Second sleeve material 13 Peripheral wall 14 Lower end portion 15 Intermediate portion 16 Upper end portion 17 Fixing member (fixing means)
18 1st connection plate 19 2nd connection plate 20 Hole 21 Peripheral wall 22 Top wall 23 Connection lower end part 24 Exposed intermediate part (exposed part)
25 Exposed upper end (exposed part)
26 Lid 27 Outer peripheral edge 28 Flange 29 Misalignment stop plate (connecting means)
30 connecting plate 31 lower end edge 32 insertion plate 33 upper end edge 34 waterproofing tape (connecting means)
35 Deck plate 36 Concrete 37 Through hole 38 Slab 39 Screw (screw)
40 Gum tape (fixing means)
41 Upper surface 42 Handle 43 Upper surface 44 Inner wall 45 Intersection

Claims (8)

In the slab sleeve material used when the through hole is formed in a predetermined portion of the slab made of the concrete and the deck plate, installed on the deck plate before placing concrete,
The slab sleeve material extends upward from the deck plate, and after placing the concrete, a hollow first sleeve material that is entirely buried in the concrete, and a first sleeve material disposed above the first sleeve material. Formed from two sleeve materials,
The first sleeve material is fixed to the deck plate by a fixing means, a top end portion that is detachably connected to the second sleeve material by a connecting means, and a space between the top end portion and the bottom end portion. An intermediate portion extending to the upper end portion of the first sleeve material, and a connecting lower end portion that is detachably connected to the upper end portion of the first sleeve material and buried in the concrete; An exposed portion that extends upward and is exposed upward from the upper surface of the concrete; and a lid portion that closes an upper end opening surrounded by an upper end edge of the exposed portion,
In the sleeve material for the slab, the concrete is placed on the deck plate on which the sleeve is installed, and after the concrete is hardened, the second sleeve material is separated from the first sleeve material, so that the slab A sleeve material for a slab, wherein the through-hole penetrating in the thickness direction is formed.   The connecting means is a slip-preventing plate that extends downward from the inner peripheral surface of the connecting lower end portion of the second sleeve material and contacts the inner peripheral surface of the first sleeve material, and in the sleeve material for the slab, The slab sleeve material according to claim 1, wherein the displacement stop plates are arranged with a predetermined distance apart in a direction around the exposed lower end portion of the second sleeve material.   The connecting means is a waterproofing tape attached to an outer peripheral surface of an upper end portion of the first sleeve material and an outer peripheral surface of a lower end portion of the second sleeve material that are connected to each other, and the sleeve material for the slab Then, the first sleeve material and the second sleeve material are connected in a state where the outer peripheral surface of the first sleeve material and the outer peripheral surface of the second sleeve material are flush with each other, and the first sleeve material The sleeve material for slabs according to claim 1 or 2, wherein a gap between an upper end portion and a connection lower end portion of the second sleeve material is closed by the waterproof tape.   4. The slab sleeve according to claim 1, wherein a grippable flange extending radially outward of the second sleeve material is formed at an upper end edge of the exposed portion of the second sleeve material. 5. Wood.   The slab sleeve material according to any one of claims 1 to 4, wherein a handle extending upward from the lid portion is attached to the lid portion of the second sleeve material.   In the slab sleeve material, when the concrete is placed on the deck plate on which the slab sleeve material is installed, the upper end portion of the first sleeve material and the connection lower end portion of the second sleeve material are on the upper surface of the concrete. The sleeve material for slabs according to any one of claims 1 to 5, which is located in a lower vicinity.   In the slab sleeve material, at least the first sleeve material of the first sleeve material and the second sleeve material is made of paper, and the first sleeve material is removed from the through hole after the concrete has hardened. The sleeve material for slabs according to any one of claims 1 to 6.   The sleeve material for slabs according to any one of claims 1 to 6, wherein the first sleeve material and the second sleeve material are made of either metal or synthetic resin.

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