JPH09310491A - Sleeve hole former for concrete slab - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide such a former as being capable of accurately making a pipe joint insertion sleeve hole during placing a concrete slab in drain pipe joint installation construction without doing troublesome work. SOLUTION: A sleeve hole former 1 for a concrete slab has an approximately reverse truncated cone shaped body 2 molded in a hollow shape, protrusions formed on the body 2 and steps 4 formed below the body 2. A cylindrical sleeve void pipe 11 is fitted to the steps 4 and fixed to a form 6 via a fixed leg 7 and a center lid 12, ant after concrete is hardened the sleeve hole former 1 is removed and then the form 6 and the void pipe 11 are removed in sequence from the concrete slab. The sleeve hole former 1 and the void pipe 11 are transferred to the concrete slab. The concrete slab C is placed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sleeve hole forming tool for a concrete slab used in a concrete placing work in a drainage pipe joint installing work for an apartment house or the like.

[0002]

2. Description of the Related Art When installing a drainage pipe joint in a housing complex or the like, a sleeve hole for inserting the drainage pipe joint must be preliminarily drilled when placing a concrete slab. Conventionally, in order to form a sleeve hole for a concrete slab, at each position where a drainage pipe joint is inserted, a cylindrical paper pipe or vinyl pipe is temporarily fixed to the formwork with nails, and then concrete is placed. Was.

[0003]

However, by only temporarily fixing the paper tube or the vinyl tube as described above, when the concrete is placed, the paper tube or the vinyl tube may be collapsed or overturned due to the pressure of the concrete being pumped into the sleeve hole. Can often not be maintained in a predetermined shape or position.

Further, in the past, since the position where the lateral branch pipe was arranged was relatively higher than the upper surface of the concrete slab, it was possible to tighten the cap nut with a margin on the upper surface of the concrete slab. In particular, especially in condominiums, etc., the floor level is reduced by the stepless floor without stumbling, and the horizontal branch pipes that are piped under the floor are drained so that they become lower toward the drainage fitting side. Since the slope is formed, it becomes necessary to bring the lateral branch pipe as close as possible to the upper surface of the concrete slab in a limited space, which makes it difficult to tighten the cap nut. However, in the conventional method of temporarily fixing paper tubes or vinyl tubes to the formwork with nails, etc., the top surface of the concrete slab to be placed and the seat surface of the side branch pipe connection port cap nut are almost at the same height. Since the concrete is hardened and the formwork is disintegrated, the cap nut that connects the side branch pipe and the drainage pipe joint is inserted on the concrete slab upper surface when the drainage pipe joint is inserted into the sleeve hole. Can not be tightened due to interference. Therefore, it is necessary to avoid interference by partially scraping the upper surface of the concrete slab to provide a gap between the cap nut and the upper surface of the concrete slab, which is very troublesome.

The present invention is to solve the above-mentioned problems, and in order to reduce the floor of the lateral branch pipe, a cap nut is previously placed on the upper surface of the concrete slab at the time of placing the concrete in the insertion work of the drainage pipe joint. An object of the present invention is to provide a sleeve hole forming tool that secures a space for tightening and shortens the work time of drainage pipe insertion work by eliminating concrete scrubbing work and that can form a sleeve hole accurately.

[0006]

In order to solve the above-mentioned problems, a sleeve hole forming tool for a concrete slab according to the present invention is configured as follows. That is, a sleeve hole forming tool used at the time of concrete placing work to form a sleeve hole for inserting a drainage pipe joint in a concrete slab, the main body body having a hollow upper part Part is formed in a substantially inverted truncated cone shape, at least one semi-cylindrical protrusion is formed on the upper part of the body part, a wall part is formed on the end surface of the protrusion part, and a step is formed on the lower part of the body part. It is characterized in that a convex portion is formed.

Further, it is preferable that the stepped convex portion is a bottomless convex portion.

Further, the stepped projection may be a bottomed projection having at least one screw hole.

The sleeve hole forming tool is a sleeve hole forming tool used in concrete placing work for forming a sleeve hole for inserting a drainage pipe joint in a concrete slab. The outer peripheral surface of the main body of the hole forming tool is wholly covered by the outer wall, and the inside is formed in a hollow shape, and at least one semi-cylindrical projection is formed on the upper part of the main body body formed in a substantially inverted truncated cone shape. Is formed, a stepped convex portion is formed in the lower portion of the body portion, and at least one screw hole is formed in the upper surface and the lower surface of the body portion.

Further, the sleeve hole forming tool of the present invention comprises:
A sleeve hole forming tool used at the time of concrete placing work for forming a sleeve hole for inserting a drainage pipe joint in a concrete slab, wherein the body part of the body is formed into a substantially inverted truncated cone shape, At least one semi-cylindrical projection is formed on the upper part of the section, a step-shaped projection is formed on the lower part of the body section, and at least one screw hole is formed on the upper surface and the lower surface of the body section. It is characterized by being formed.

Further, a cylindrical cylindrical paper tube provided upright on the mold is engaged with the stepped convex portion, and fixing means arranged on the mold presses the body portion. It is preferable that the sleeve hole forming tool and the cylindrical paper tube are formed so as to be fixed to the mold.

Further, the stepped convex portion with which the cylindrical paper tube is engaged corresponds to the cylindrical paper tube arranged so as to have a gap between it and the drainage pipe joint inserted through the sleeve hole. It is more preferable that the diameter is larger than the outer diameter of the drainage pipe joint.

More preferably, at least one ear portion may be formed on the upper surface of the main body portion between the protrusions.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of a sleeve hole forming tool for a concrete slab (hereinafter referred to as forming tool), and FIG.
It is a sectional view. The forming tool 1 is arranged at a predetermined position to open a sleeve hole for inserting a drainage pipe joint when a concrete slab such as a housing complex is placed, and the upper part is opened to form a hollow shape. The body portion 2 has a substantially inverted truncated cone shape, a semi-cylindrical projection 3 formed at a plurality of locations (three locations in the present embodiment) in the upper portion, and a step-shaped projection formed in a hollow shape in the lower portion. And a part 4 are formed. A wall 3a is formed on the end surface of the semi-cylindrical projection 3 so that the concrete forming tool 1
It prevents you from getting inside.

Further, the stepped convex portion 4 formed in the lower portion of the forming tool 1 has a back seat portion 4a against which a tube end portion of a cylindrical sleeve void tube 11 described later abuts, and an inner peripheral surface of the sleeve void tube 11. A cylindrical guide portion 4b is formed so that
A front seat portion 4c is formed on the front side of the back seat portion 4a. And
The stepped convex portion 4 is larger than the outer diameter of the portion of the drainage pipe joint corresponding to the sleeve void pipe 11 so that a gap is provided between the sleeve void pipe 11 and the drainage pipe joint. It is formed. The forming tool 1 is made of a thermoplastic resin such as PVC (vinyl chloride), polypropylene or polyethylene, and is formed by vacuum molding the thermoplastic resin. If the forming tool 1 is made of a transparent material, it is possible to see the marking line through the inside.

Further, when carrying the forming tool 1 formed in a hollow shape, a plurality of taper-shaped parts of the body portion 2 of the forming tool 1 can be overlapped to carry a plurality of them simultaneously.

FIG. 3 shows a state in which the forming tool 1 is used when placing a concrete slab, which will be described together with the construction procedure.

First, the fixed leg 7 is nailed to the formwork 6. The fixed leg 7 is composed of two long screws 8 and a long plate 9, and two long screws 8 whose one end is fixed to the plate 9 are erected upward. Then, a plurality of nails 10 are driven from the plate 9 to the form 6, and the fixed legs 7
Are fixed to the formwork 6. Then, a sleeve void tube 11 formed in a cylindrical shape so as to be concentric with the center between the two long screws 8 is installed on the mold 6. Then, the upper inner peripheral surface of the sleeve void tube 11 is fitted to the outer peripheral surface of the guide portion 4b of the forming tool 1. In this state, the two long screws 8 are erected inside the forming tool 1, and the upper end surfaces thereof are located above the seat 4c of the forming tool 1 and below the upper end surface of the forming tool 1. Then, the inner lid 12 is arranged so that the outer edge portion is supported by the surface of the front seat portion 4c of the forming tool 1. The inner lid 12 is formed in a disc shape and has a hole for inserting the two long screws 8. When the inner lid 12 is arranged, the wing nuts 13 screwed onto the respective long screws 8 are tightened to fix the inner lid 12 to the forming tool 1. Inner lid 12 is forming tool 1
The sleeve void tube 11 and the forming tool 1 are fixed to the mold 6 by being fixed to the mold 6. Then, the lid 14 is placed on the upper surface of the forming tool 1.

The inner lid 12 is not limited to a disc shape, but is formed in an elongated shape as shown in FIG.
It is also possible to use a long washer 12A having a long hole portion which can be attached and detached only by loosening it and which can be hung over two long screws 8 at the same time.

Further, the plate 9 is not limited to the elongated shape, and may be a disk plate 19 having a disk-shaped peripheral edge with a convex portion 19a as shown in FIG. . In this case, the outer peripheral surface of the peripheral edge of the convex portion 19a is formed so as to guide the inner peripheral surface of the sleeve void tube 11, a hole 19b for driving the nail 10 is formed in the bottom portion, and the long screw 8 is provided at least at one place in the central portion. Alternatively, it is more preferable that it is formed so as to be fixed or screwed at two places.

After the concrete is poured in this state and the concrete is hardened to form the concrete slab C, the forming tool 1 and the sleeve void pipe 11 are removed together with the form 6, and as shown in FIG. The outer peripheral surfaces of the forming tool 1 and the sleeve void pipe 11 are transferred, and the sleeve hole 15 is formed in the concrete slab C. At the upper part of the sleeve hole 15, a relief portion 15a for inserting the joint portion of the drainage pipe joint is formed.

FIG. 7 shows a state in which the drainage pipe joint is inserted through the sleeve hole 15 formed as described above.
It will be described together with the piping procedure. The body portion 20a of the drainage pipe joint 20 having three joint ports 21 in the sleeve hole 15
Is inserted. Positioning is performed in this state, and the mortar M is backfilled in the gap (corresponding to around the body portion 20a of the drainage pipe joint 20) formed in the sleeve void pipe 11 and the drainage pipe joint 20 pipe, After hardening of the mortar M, the drainage pipe joint 20 is fixed to the concrete slab C. As a material for backfilling, a filler having a vibration-proof and sound-proof effect may be used instead of mortar.

Above the fixed drainage pipe joint 20,
An upper drainage vertical pipe 22 is connected, and a lower drainage vertical pipe 23 is connected below the drainage pipe joint 20. A horizontal drain pipe 24 is connected to the three joint ports 21 via cap nuts 25. At this time, the lower portion of the cap nut 25 enters the relief portion 15a of the sleeve hole 15, and the drain horizontal branch pipe 2
4 can be piped close to the upper surface of the slab, and the horizontal drain branch pipe 24 can be accurately connected to the drainage pipe joint 20.

In the present embodiment, the body 2 of the forming tool 1 is formed in a hollow shape, but the body 2 may be filled. In this case, it is necessary to form a hole through which the long screw 8 passes.

8 and 9 show a forming tool 31 according to another embodiment of the present invention. The forming tool 31 is formed by a well-known blow molding. In blow molding, a parison or sheet of plastic that has been softened by overheating is inflated by air pressure etc. in the mating mold, and it is brought into close contact with the mold and at the same time cooled to mold the hollow body, so the whole is covered with plastic. The inside is hollow.

A plurality of semi-cylindrical projections 33 (three in this embodiment) having a wall 33a on the end face are formed on the upper portion of the substantially conical body portion 32, and the lower portion of the body portion 32 is formed. Has a stepped convex portion 34. Further, a concave portion 35 is formed on the upper surface and a bottomed concave portion 36 is formed on the lower surface, and screw holes 37 and 3 are formed at the central portions of the concave portion 35 and the bottomed concave portion 36, respectively.
7 are formed.

The screw holes 37 formed in the recess 35 and the bottomed recess 36 may be provided in one or two places, respectively, and the long screw 8 fixed to the plate 9 in the screw hole 37. Are formed so as to penetrate therethrough.

When this forming tool 31 is used when pouring concrete slabs, the fixing leg 7 is fixed to the form 6, and the sleeve void pipe 11 is centered around the fixing leg 7 as in the forming tool 1 described above. After standing upright on the mold 6, the upper inner peripheral surface of the sleeve void tube 11 is placed on the outer peripheral surface of the stepped convex portion 34 of the forming tool 31 while the long screw 8 is passed through the screw hole 37 of the forming tool 31. Fit together. Then, the concave portion 35 of the forming tool 31
Nuts and washers with long screws 8
Then, the forming tool 31 and the sleeve void tube 11 are fixed to the mold 6 by tightening a nut. Then, concrete is poured to form a concrete slab C. Then, when the forming tool 31, the sleeve void tube 11, and the form are removed, the state shown in FIG. 6 is obtained.

FIG. 10 shows another embodiment of the present invention, in which a forming tool 41 shows a modification of the forming tool 31 in FIG. 8, and an ear portion 48 is provided between the protrusions 43 on the upper surface of the body portion 42. It is formed in each of the four opposite corners. An insertion hole 49 into which the bolt 50 is inserted is formed in each ear portion 48. As shown in FIG. 11, the bolt 50 is formed in an L shape and is attached to the forming tool 41 in advance. Then, when the forming tool 41 is removed after the concrete is placed, the sleeve hole is formed and the bolt 50 remains fixed to the concrete slab C. Then, if the drainage pipe joint is fixed to the bolt 50 when the drainage pipe joint is arranged, the drainage pipe joint is firmly fixed to the concrete slab C, and stable piping can be provided.

By connecting this drainage pipe joint, which is firmly fixed, and connecting the drainage stack pipe, it can be utilized as a structure of a building, that is, a pillar, so that the cost can be greatly reduced.

[0032]

As described above, the sleeve hole forming tool for a concrete slab of the present invention is used during concrete placing work to form a sleeve hole for inserting a drainage pipe joint in the concrete slab, The hollow body is formed in a substantially inverted truncated cone shape, and at least one semi-cylindrical protrusion is formed on the upper portion of the body, and a wall is formed on the end surface of the protrusion. Has been formed.
In addition, a stepped convex portion is formed on the lower portion of the body portion.
Then, at the time of pouring concrete, by disposing this forming tool on the form via the cylindrical paper tube fitted to the step-shaped convex portion formed in the lower part of the forming tool, the sleeve hole can be surely provided as predetermined. Can be formed. Furthermore, if the upper surface of the concrete slab is formed according to the shape of the protrusion on the upper part of the body, it is possible to form a relief part for the cap nut and screw ring when connecting the lateral branch pipe to the drainage pipe joint. Since the pipe seat of the lateral branch pipe can be brought close to the upper surface of the concrete, the floor of the lateral branch pipe can be made lower, and the work of cleaning the upper surface of the concrete is eliminated. Further, in the case where the body having the opening at the top is formed in a hollow shape, a plurality of forming tools can be stacked and carried.

Further, since this forming tool is formed by vacuum molding or blow molding, it can be manufactured inexpensively and easily.

[Brief description of drawings]

FIG. 1 is a perspective view of a sleeve hole forming tool for a concrete slab according to a position embodiment of the present invention.

FIG. 2 is a sectional view of the same.

FIG. 3 is a cross-sectional view showing a state in which the forming tool is used for placing concrete slabs.

FIG. 4 is a view showing another form of the inner lid in FIG.

5 is a view showing another form of the plate in FIG.

FIG. 6 is a cross-sectional view of the concrete slab after removing the forming tool.

FIG. 7 is a view showing a state in which a drainage pipe is provided in a sleeve hole formed by the forming tool.

FIG. 8 is a front sectional view of a sleeve hole forming tool showing another embodiment of the present invention.

FIG. 9 is a perspective view of the same.

FIG. 10 is a plan view of a sleeve hole forming tool showing another embodiment of the present invention.

FIG. 11 is a cross-sectional view showing how the sleeve hole forming tool of FIG. 10 is used.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Sleeve hole forming tool for concrete slab 2 ... Body part 3 ... Projection part 3a ... Wall 4 ... Step convex part 11 ... Sleeve void tube (cylindrical paper tube) 15 ... Sleeve hole 15a ... Relief part

Claims (8)

[Claims] 1. A sleeve hole forming tool used in concrete placing work for forming a sleeve hole for inserting a drainage pipe joint in a concrete slab, the upper part of which is formed into a hollow shape. The main body portion is formed in a substantially inverted truncated cone shape, at least one semi-cylindrical protrusion is formed on the upper portion of the body portion, and a wall portion is formed on an end surface of the protrusion portion. A sleeve hole forming tool for a concrete slab, which is characterized in that a stepped convex portion is formed in the lower portion. 2. The sleeve hole forming tool for a concrete slab according to claim 1, wherein the stepped convex portion is a bottomless convex portion. 3. The step-like convex portion is a bottomed convex portion having at least one screw hole.
The sleeve hole forming tool of the concrete slab according to the above. 4. A sleeve hole forming tool used in concrete placing work for forming a sleeve hole for inserting a drainage pipe joint in a concrete slab, the outer peripheral surface of a main body of the sleeve hole forming tool. Is entirely covered with an outer wall, the inside is formed in a hollow shape, and at least one semi-cylindrical protrusion is formed on the upper part of the main body body portion formed in a substantially inverted truncated cone shape. A sleeve hole forming tool for a concrete slab, characterized in that a stepped convex portion is formed in a lower portion of the body, and at least one screw hole is formed in an upper surface and a lower surface of the body portion. 5. A sleeve hole forming tool used in concrete placing work for forming a sleeve hole for inserting a drainage pipe joint in a concrete slab, wherein the main body has a substantially inverted truncated cone shape. Is formed, at least one semi-cylindrical protrusion is formed on the upper part of the body,
A sleeve hole forming tool for a concrete slab, wherein a stepped convex portion is formed in a lower portion of the body portion, and at least one screw hole penetrating from an upper surface to a lower surface of the body portion is formed. 6. A cylindrical cylindrical paper tube provided upright on a mold is engaged with the stepped convex portion, and fixing means arranged on the mold presses the body portion. 5. The sleeve hole forming tool and the cylindrical paper tube are formed so as to be fixed to the mold frame.
Alternatively, the sleeve hole forming tool of the concrete slab according to claim 5. 7. The cylindrical paper tube arranged to have a gap between the stepped projection with which the cylindrical paper tube is engaged and a drainage pipe joint inserted into a sleeve hole. 7. The sleeve hole forming tool for a concrete slab according to claim 6, wherein the tool has a diameter larger than the outer diameter of the drainage pipe joint. 8. The concrete slab sleeve according to claim 1, wherein at least one ear is formed between the protrusions on an upper surface of the main body portion. Hole forming tool.