Floor sleeve unit

Abstract

To easily install a sleeve at a floor penetration part of a pipe vertically penetrating each floor of a building.SOLUTION: The floor sleeve unit includes a cylindrical sleeve 11 through which the pipe 1 passes, a floor plate steel plate 20 in which a circular hole 21 having a diameter corresponding to an inner diameter of the sleeve 11 is opened, a lower end of the sleeve 11 is fixed at a position of the circular hole 21, and which is laid so as to close the floor through opening 3, and a guide frame 30 which is provided on a lower surface of the floor plate steel plate 20 and guides an installation position of the sleeve 11 at the time of installation.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a floor sleeve unit, and more particularly to a floor sleeve unit that is installed at the floor penetration portions of various pipes that pass vertically through each floor of a building. [Background technology]

[0002] Conventionally, in piping work for various types of pipes that penetrate vertically through each floor of a building, after the deck plate has been laid, the position where the pipes will penetrate is determined, a void pipe for the box cutout is installed on the deck plate, and after the floor concrete has been poured, a sleeve is installed at the floor penetration section by cutting the deck plate at the box cutout position and creating a penetration hole.

[0003] In response to this, various proposals have been made to improve the efficiency of sleeve installation work.Patent Document 1 discloses a floor sleeve unit 100 in which floor sleeves 101 are arranged and erected in rows by providing sleeve arrangement holes at predetermined piping positions on a deck plate 102 attached to a temporary frame 103 (hereinafter referred to as the reference number in Patent Document 1).

[0004] Patent document 2 discloses a construction method in which a factory-fabricated sleeve unit consisting of a floor steel plate to which multiple piping sleeves are attached is attached to a beam via a pipe shaft frame through ground assembly work, and then the entire beam is lifted. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Utility Model Registration No. 3200323 [Patent Document 2] Japanese Patent Application Publication No. 9-125670 Summary of the Invention [Problem to be solved by the invention]

[0006] Conventional piping installation work requires the individual construction of multiple sleeves at the floor penetrations on-site, which is time-consuming and labor-intensive. In addition, the deck plate at each sleeve location must be melted and removed, which requires hot work and requires careful attention and preventative measures to prevent fires.

[0007] Furthermore, the sleeve unit disclosed in Patent Document 1 requires the floor sleeve to be attached to a deck plate of a predetermined shape corresponding to the piping installation position, and then the sleeve must be positioned and attached to a temporary frame constructed on-site, making the installation of the sleeve unit complicated.

[0008] The sleeve unit and its construction method disclosed in Patent Document 2 require positioning and welding work to attach the pipe shaft frame to the beam. Welding work is also required when installing the sleeve unit on the pipe shaft frame, which poses a problem of intensive on-site construction work even when it is a ground assembly work.

[0009] SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a floor sleeve unit which solves the problems of the above-mentioned conventional technology and eliminates the need for positioning work for sleeve installation. [Means for solving the problem]

[0010] The floor sleeve unit of the present invention is a floor sleeve unit that is installed so that multiple pipes that pass vertically through the floors of each floor of a building pass through openings provided in the floors of each floor, and is characterized by comprising: a cylindrical sleeve through which the pipes pass; a steel floor plate that has a circular hole of a diameter corresponding to the inner diameter of the sleeve, and to which the lower end of the sleeve is fixed at the position of the circular hole and is laid so as to cover the opening; and a guide frame that is provided on the underside of the steel floor plate and that guides the installation position of the sleeve when installing the floor sleeve unit.

[0011] It is preferable that the guide frame has an outer frame with an outer peripheral edge that has a predetermined clearance between it and the inner peripheral edge of the opening, and that the installation position of the deck steel plate is regulated within the range of the clearance, and the installation position of the sleeve is guided.

[0012] The clearance is preferably smaller than half the difference between the inner diameter of the sleeve and the outer diameter of the pipe passing through the sleeve.

[0013] It is preferable that the steel floor plate be divided into a plurality of pieces according to the number of sleeves and laid so as to close the opening. [Effects of the Invention]

[0014] According to the present invention, when installing a floor sleeve unit, the reinforcing member functions as a positioning guide that absorbs positioning errors during installation, thereby eliminating the need for complicated positioning work and achieving significant improvements in work efficiency. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is an overall perspective view showing one embodiment of a floor sleeve unit of the present invention; [Figure 2] 2 is a perspective view showing the components of the floor sleeve unit shown in FIG. 1 before assembly. FIG. [Figure 3] 2A and 2B are plan, front, and side views of the floor sleeve unit shown in FIG. 1; [Figure 4] 2 is a plan view showing the installation of the floor sleeve unit shown in FIG. 1 on the opening reinforcing frame and the installation state. [Figure 5] 2 is an explanatory diagram showing the state of the sleeve position when the floor sleeve unit shown in FIG. 1 is installed. FIG. [Figure 6] FIG. 10 is a partial cross-sectional perspective view showing the state in which each pipe is installed in the floor penetration section after the floor slab is constructed. [Figure 7] An explanatory diagram of the work procedure from the installation of the floor sleeve unit shown in Figure 1 to the installation of each pipe through the floor after the floor slab is constructed. [Figure 8] A plan view showing the work of installing the floor sleeve unit, which is manufactured in sections, on the opening reinforcement frame and the installed state. DETAILED DESCRIPTION OF THE INVENTION

[0016] Hereinafter, an embodiment of the floor sleeve unit of the present invention will be described with reference to the accompanying drawings.

[0017] 1 and 3 show the external appearance of a floor sleeve unit according to one embodiment of the present invention, and FIG. 2 shows each component before assembly. The floor sleeve unit 10 shown in FIG. 1 is a factory-manufactured product that includes four cylindrical sleeves 11 of different diameters, a rectangular steel floor plate 20 having four circular holes 21 of a diameter equal to the inner diameter of the sleeves 11, to which the lower ends of the sleeves 11 are fixed at the positions of the circular holes 21, and a guide frame 30 that is attached to the underside of the steel floor plate 20 to reinforce the steel floor plate 20 from below and to guide the positioning of the floor sleeve unit 10 when it is installed, as shown in FIG. 1. In this embodiment, the floor sleeve unit 10 shown in FIG. 1 is used for three pipes 1 (a water supply pipe (100A), a drainage pipe (100A), and a gas pipe (50A)) and a pipe 1 (electrical conduit) that accommodates a dwelling trunk cable bundle.

[0018] In this embodiment, the sleeve 11 is fabricated by bending a thin steel plate (e.g., approximately 1.2 to 2.0 mm thick) into a cylindrical shape. However, it is also preferable to use various prefabricated thin-walled steel pipes of the appropriate diameter. Prefabricated paper void pipes can also be used. When using void pipes instead of steel sleeves 11, they are preferably removed after the floor concrete is poured, as with conventional box-cut formwork. The inner diameter of each sleeve 11 is designed to be two to three sizes larger than the nominal diameter of the pipe 1 it penetrates, ensuring sufficient clearance between the sleeve 1 and the pipe 1 to ensure proper penetration of the fire compartment. For example, when the pipe axis of the pipe 1 (100A) and the sleeve 11 (150A) are aligned, half the difference between the inner diameter of the sleeve 11 and the outer diameter of the pipe 1 (referred to as clearance C1) is 25 mm.

[0019] In this embodiment, the steel floor plate 20 is a thin steel plate measuring 900 mm x 475 mm and having a thickness of 1.6 mm. As shown in FIG. 2, the steel floor plate 20 has circular holes 21 with a diameter equal to the inner diameter of the sleeves 11, and the lower ends of the sleeves 11 are welded to the steel floor plate 20 so that they stand upright at the circular holes 21. The planar dimensions of the through-floor openings 3 (FIG. 4(a)) provided in a portion of the floor of each floor are determined by the diameter, number, and spacing of the pipes 1 to be installed in this portion, but the steel floor plate 20 is designed to have dimensions that can completely block the through-floor openings 3 from above. Furthermore, as the number of pipes 1 installed increases, the planar dimensions of the through-floor openings 3 also increase. In this case, the steel floor plate 20 may be divided into multiple pieces (for example, two pieces) for use, as will be described later with reference to FIG. 8.

[0020] As shown in Fig. 2, the guide frame 30 is a frame body made up of assembled structural steel attached to the underside of the floor steel plate 20. Its function is to prevent bending deformation of the floor steel plate 20, and also to guide (position) the position of each sleeve provided on the floor steel plate 20 within a range that can be penetrated by the piping 1 in a subsequent process when the floor sleeve unit 10 is installed to close the floor penetration opening 3.

[0021] In this embodiment, the guide frame 30 is composed of an outer frame 31 and two horizontal ribs 32, and all components are made of L-shaped steel (L-20 x 20) of the same size. As shown in each of Figures 3, the outer dimensions of the outer frame 31 are approximately 100 mm shorter in both length and width than the outer dimensions of the steel floor plate 20, and the outer frame 31 is welded to the underside of the steel floor plate 20 so that the edge of the upper flange of the outer frame 31 is located approximately 50 mm (= d) inward from the edge of the steel floor plate 20. As shown in Figures 2 and 3(a), the two horizontal ribs 32 are positioned in a balanced manner between the attachment positions of the sleeves 11 and are attached to parts of the outer frame 31 to prevent the steel floor plate 20 from bending.

[0022] [Floor sleeve unit installation work] The floor sleeve unit 10 of the present invention is manufactured in a factory into the shape shown in FIG. 1, transported to a construction site for a new building, and installed in the floor penetration opening 3 on each floor of the building under construction. FIGS. 4 and 5 show the installation of the floor sleeve unit 10 to cover the floor penetration opening 3. As shown in FIG. 4(a), on each floor of the building, the floor penetration opening 3 is defined into a predetermined rectangular shape by an opening reinforcing frame 5 made of steel beams supported by steel beams (not shown), and a deck plate 6 (FIG. 5(a)) is laid around the opening. The floor sleeve unit 10 is installed to cover the floor penetration opening 3 from above. At this time, as shown in FIGS. 4(b) and 5, the outer peripheral edge 20a of the steel floor plate 20 of the floor sleeve unit 10 is held so as to ensure a predetermined overlap (e.g., approximately 40 mm) with the inner peripheral edge 5a of the opening reinforcing frame 5. At this time, the planar dimensions of the outer peripheral edge 31a of the outer frame 31 of the guide frame 30 attached to the underside of the floor steel plate 20 are designed to be approximately 20 mm smaller than the planar dimensions of the inner peripheral edge 5a of the opening reinforcement frame 5, so the clearance (play) C2 between the outer peripheral edge 31a of the outer frame 31 and the inner peripheral edge 5a of the opening reinforcement frame 5 is approximately 10 mm (Figure 5(a)).

[0023] In contrast, as described above, with regard to the clearance C1 between each sleeve 11 arranged on the floor steel plate 20 and the pipe 1, in the above example (pipe 1 (100A), sleeve 11 (150A)), if there is no error in the pipe position or the installation position of the sleeve 11 (the pipe axis of pipe 1 and the pipe axis of sleeve 11 are aligned), the clearance C1 = 25 mm is half the difference between the inner diameter dimension of sleeve 11 and the outer diameter dimension of pipe 1 (Figure 5(a)). In this case, the outer frame 31 of the guide frame 30 functions as a slip prevention device when laying the floor steel plate 20, and is able to slide by the clearance C2. As a result, each sleeve 11 on the floor sleeve unit 10 can be installed so that the clearance C1 is within the range of approximately 15 to 35 mm. For example, Figure 5(b) shows the floor sleeve unit 10 installed in a position where the outer peripheral edge 31a of the outer frame 31 of the guide frame 30 abuts the inner peripheral edge 5a of the opening reinforcement frame 5, but even in this case the clearance C1 between the piping 1 and the sleeve 11 falls within the above-mentioned value range.

[0024] In this way, with the floor sleeve unit 10 of the present invention, the floor sleeve unit 10 is laid on each floor so as to block the floor-penetrating opening 3 surrounded by the opening reinforcement frame 5, and by simply welding or screwing a portion of the outer edge 20a of the floor steel plate 20 to the opening reinforcement frame 5, it is possible to align the position of each sleeve 11 with the arrangement of the piping 1 that passes through it.

[0025] [Piping installation method using floor sleeve units] The installation work of piping 1 using the floor sleeve unit 10 of the present invention will be described below with reference to Figures 6 and 7. Figure 6 shows the completed state of a floor slab 7 in which various types of piping 1 have been installed using the floor sleeve unit 10 of the present invention. The figure shows a state in which floor concrete 9 of a predetermined thickness has been poured on top of the floor sleeve unit 10 installed so as to cover the floor penetration opening 3, three pipes 1 have been installed penetrating the floor of each floor, and rock wool R has been filled in the gap between the pipes 1 at the floor penetration portion of the sleeve 11 and the sleeve 11.

[0026] The procedure for installing piping using this floor sleeve unit 10 will be described with reference to each diagram in FIG. 7. FIG. 7(a) shows the floor penetration opening 3 and its surrounding area, where the floor sleeve unit 10 will be installed on the target floor where the floor slab is to be constructed. As shown in the figure, the floor penetration opening 3 is defined as a rectangular shape of predetermined dimensions by an opening reinforcing frame 5, which is supported by steel beams (not shown) or the like around the opening position. One end of a deck plate 6 is fixedly supported by the opening reinforcing frame 5. From this state, the outer peripheral edge 20a of the steel floor plate 20 of the floor sleeve unit 10 is placed on the inner peripheral edge 5a of the opening reinforcing frame 5, and the floor sleeve unit 10 is laid so as to close the floor penetration opening 3 (FIG. 7(b)). At this time, the outer frame 31 of the guide frame 30 attached to the underside of the steel floor plate 20 of the floor sleeve unit 10 functions as a slip prevention device against the inner peripheral edge 5a of the opening reinforcing frame 5. Therefore, if the floor sleeve unit 10 is installed so that the outer peripheral edge 31a of the outer frame 31 does not overlap the inner peripheral edge 5a of the opening reinforcement frame 5, the sleeve 11 will be guided and positioned to the position through which each pipe 1, 1... (Figure 7(e)) will be installed in a subsequent process. After the floor sleeve unit 10 is placed on the flange of the opening reinforcement frame 5, a portion of the outer peripheral edge 20a of the floor steel plate 20 is fixed to the upper surface of the flange of the opening reinforcement frame 5 by spot welding or the like. At the same time, slab reinforcement for the floor slab concrete is arranged (Figure 7(c)). After the slab reinforcement 8 is arranged, a predetermined thickness of floor concrete 9 is laid to cover the entire floor slab 7, including the floor sleeve unit 10 (Figure 7(d)). At this time, it is preferable to cover the top surface of each sleeve 11 with a temporary cover (not shown) to prevent concrete from entering the sleeve 11 of the floor sleeve unit 10 during pouring. After the construction of the floor slab 7 on each floor of the building is completed, various equipment piping 1 is installed. During the installation of the pipes 1, each sleeve 11 is already positioned by the floor sleeve units 10, which are installed on each floor with almost no misalignment in the pipe axis direction, allowing for smooth pipe installation work (Fig. 7(e)). Each pipe 1 is fixed to a part of the structure with a known fixing jig (not shown), and the space between the sleeve 11 and the pipe 1 is filled with rock wool R (Fig. 6).Prior to the filling operation, it is preferable to seal the gap between the pipe 1 and the circular hole 21 of the sleeve 11 from the underside of the steel floor plate 20 with a non-flammable hole-filling material 25 (Figure 6) from the underside of the steel floor plate 20, so that the rock wool R filled in the space is securely held in place.

[0027] (Modification of floor sleeve unit) FIG. 8(a) shows a modified example in which two separate floor sleeve units 10A, 10B are used for a design in which a large number of pipes are arranged in the floor penetration opening 3. The floor sleeve units 10A, 10B shown in the figure are divided into two to accommodate the sleeve arrangement of nine pipes (not shown) to be arranged in the floor penetration opening 3. Sleeves 11 are attached to the upper surface of each steel floor plate 20A, 20B at positions corresponding to the respective pipes, and guide frames 30A, 30B with dimensions corresponding to the planar dimensions of the steel floor plates 20A, 20B are fixed to the lower surface. A joint reinforcement rib 33 is attached to the end surface of the joint between the guide frame 30A of the steel floor plate 20A and the steel floor plate 20B, reinforcing the butt joint 40 between the two steel floor plates 20A, 20B. The joint reinforcement rib 33 is attached to the underside of the steel deck plate 20A so that approximately half of the width of the upper flange becomes the protruding portion 33a. As shown in Figure 8(b), this protruding portion 33a reinforces the butt joint 40 of the two steel deck plates 20A, 20B from below.

[0028] The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the claims. In other words, embodiments obtained by combining technical means modified appropriately within the scope of the claims are also included in the technical scope of the present invention. [Explanation of symbols]

[0029] 1 Piping 3 Floor opening 5 Opening reinforcement frame 7 Floor slab 10, 10A, 10B Floor sleeve unit 11 Sleeve 20,20A,20B Floor plate steel plate 21 Circular hole 30, 30A, 30B guide frame 31 Outer Frame 32 Cross rib 33 Joint reinforcement rib 40 Butt joint C1, C2 clearance R Rockwool

Claims

1. A floor sleeve unit that is installed so that a plurality of pipes that penetrate the floors of each floor of a building in the vertical direction pass through openings provided in the floors of each floor, a cylindrical sleeve through which the piping passes; a steel floor plate having a circular hole with a diameter corresponding to the inner diameter of the sleeve, the lower end of the sleeve being fixed at the circular hole, and laid so as to close the opening; a guide frame provided on the underside of the floor steel plate to guide the installation position of the sleeve when the floor sleeve unit is installed; A floor sleeve unit comprising:

2. The guide frame has an outer frame with an outer peripheral edge that has a predetermined clearance between it and the inner peripheral edge of the opening, and the installation position of the floor steel plate is regulated within the range of the clearance, and the installation position of the sleeve is guided.A floor sleeve unit as described in claim 1.

3. 3. The floor sleeve unit according to claim 2, wherein the clearance is less than half the difference between the inner diameter of the sleeve and the outer diameter of the pipe passing through the sleeve.

4. The floor sleeve unit according to claim 1, wherein the floor steel plate is divided into a plurality of pieces according to the number of the sleeves and laid so as to close the opening.

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