Ceiling structure subjected to water leakage countermeasure and construction method of the same

Abstract

To provide a ceiling structure which can receive water leakage with the entire ceiling surface and discharge it from a predetermined place, which is easy to construct, and which can also discharge water from a closed place.SOLUTION: A ceiling structure includes a gutter 5 along an end side of a ceiling panel 1 of a hanging ceiling, and where countermeasures are applied for water leakage dripping to the rear side of the ceiling panel 1. The ceiling panel 1 and the gutter 5 are fixed without providing gradients. On the rear side of the ceiling panel 1, a water absorbing material 7 covering a protrusion part 4 protruding from a flat surface 3 is laid so as to reach the flat surfaces 3 on both lateral sides of the protrusion part 4, the water absorbing material 7 is also laid at a bottom part of the gutter 5, and at the position where the water absorbing material 7 at the bottom part of the gutter 5 reaches, a water discharge port 8 is provided. Thereby, the water leakage which has dripped to the rear side of the ceiling panel 1 is made to ride over the protrusion part 4 by utilizing a capillary phenomenon generating in the water absorbing material 7, it is guided to the gutter 5 from the ceiling panel 1, is further guided to the water discharge port 8 of the gutter 5, and is discharged from the water discharge port 8.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a ceiling structure that is designed to prevent water leakage from the slab and a construction method thereof. [Background technology]

[0002] Generally, at elevated stations, underground stations, station buildings, etc., a suspended ceiling is used in which a ceiling substructure consisting of a grid of rafter supports and rafters is suspended from a concrete slab using suspension bolts, and ceiling panels are attached to the underside of the ceiling substructure.

[0003] In such suspended ceilings, if water leaks from a crack in the slab above, a temporary measure is often taken to prevent water from dripping below the ceiling panel by covering the underside of the ceiling panel where the leak occurred with a waterproof sheet, and then using a hose to collect the water from the waterproof sheet into a bucket placed on the floor.

[0004] In addition, measures may be taken such as placing a waterproof sheet on the back of the ceiling panel where the leak occurred or installing a waterproof pan.

[0005] Other proposals have also been made to prevent water leakage across the entire ceiling structure. For example, Patent Document 1 below describes a suspended ceiling that uses spandrels, made of long metal plates joined together at convex joints, in which the spandrels are sloped from one end to the other and the bottoms of the gutters at the edges along the edges are also sloped to allow drainage.

[0006] Furthermore, Patent Document 2 listed below describes a ceiling panel made of spandrels that is divided lengthwise, with each spandrel inclined downwards toward the division, and drainage is achieved by sloping the bottom surface of a gutter provided at the division. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Japanese Patent Application Laid-Open No. 2005-336727 [Patent Document 2] Japanese Patent Application Laid-Open No. 2006-16846 Summary of the Invention [Problem to be solved by the invention]

[0008] However, localized measures such as waterproof sheets and prevention pans cannot pinpoint the location of future leaks, so leaks must be addressed each time they occur. In addition, there is the problem that the hoses and buckets used to collect the water can get in the way of pedestrians inside the station.

[0009] Furthermore, if a waterproof sheet is placed behind the ceiling panel or if a protective pan is installed, it takes a great deal of time to transport and install it, and if there is no space above the ceiling for installation, this measure is impossible.

[0010] On the other hand, as described in Patent Documents 1 and 2, measures such as sloping the spandrel ceiling panels and gutters not only take time and effort to install, but also have the problem that there is no escape route for leaking water from blocked areas on the back side of the ceiling panels, which are surrounded by the joints of the long boards that form convex parts and the peripheral parts of the equipment that protrude from the back side of the ceiling panels, and so the leaking water becomes trapped in these blocked areas.

[0011] Therefore, this invention aims to provide a ceiling structure that can receive leaking water over the entire ceiling surface, drain water from specified locations, is easy to install, and can drain water from blocked locations, as well as to provide a specific installation method. [Means for solving the problem]

[0012] In order to solve the above problems, the present invention provides a ceiling structure that has gutters along the edges of ceiling panels of a suspended ceiling and that takes measures to prevent water from dripping down the back side of the ceiling panels, The ceiling panel and the gutter are fixed without any slope, and a water-absorbing material is laid on the back side of the ceiling panel so as to cover a convex portion protruding from a flat surface and extend to the flat surfaces on both sides of the convex portion, and a water-absorbing material is also laid at the bottom of the gutter, and a drain outlet is provided at the bottom of the gutter at a position where the water-absorbing material reaches, The leaked water that drips onto the backside of the ceiling panel is guided over the convex portion by utilizing the capillary action that occurs in the water-absorbing material, from the ceiling panel to the gutter, and further to the drain outlet of the gutter, where it is drained.

[0013] The ceiling panel is a spandrel made by joining long, thin metal plates together at the joints in the lengthwise direction that form the convex portions.

[0014] Furthermore, even if there is a blocked portion on the ceiling panel where the flow of water to the gutter is blocked by the convex portion, The water that leaks and drips into the blocked area is moved by the absorbent material over the convex portion and onto the flat surface of the ceiling panel that is connected to the gutter, where it is drained away.

[0015] In the construction method for such a ceiling structure with water leakage prevention measures, a clip is attached to the water-absorbing material, and the water-absorbing material is inserted from below the ceiling panel through an opening onto the back side of the ceiling panel and pressed into a predetermined position, so that the clip engages and fixes the water-absorbing material to the ceiling panel.

[0016] Furthermore, the groove members of the gutter are connected via connecting joints having shapes according to the location and arrangement of the ceiling panel.

[0017] In addition, a gutter fitting is attached to the ceiling substructure in advance, and the engaging step on one side of the gutter is engaged with the engaging step on one side of the gutter fitting, the gutter is rotated, and the other side of the gutter is fixed to the other side of the gutter fitting. [Effects of the Invention]

[0018] In the ceiling structure of this invention, water leaking from unspecified locations is received by the entire back side of the ceiling panel, and by utilizing the capillary action of the water-absorbing material, the water is guided over the convex parts on the back side of the ceiling panel and into the gutter, and then guided to the drain outlet of the gutter for drainage.This means that water can be drained from specified locations without the need to slope the ceiling panel or gutter, and can also be drained from blocked parts on the back side of the ceiling panel without being blocked by equipment, etc.

[0019] Therefore, in a suspended ceiling with gutters along the ceiling panels, construction can be easily carried out by simply placing water-absorbing material on the back side of the ceiling panels and at the bottom of the gutters, and it can be used not only when constructing a new ceiling as a whole, but also when renovating part of an existing suspended ceiling.

[0020] In addition, construction can be carried out from the underside of the ceiling panel by utilizing the opening in the ceiling panel, making construction possible even when the space behind the ceiling panel is narrow, such as below an elevated slab on which railway tracks are laid.

[0021] The drain outlet of the gutter can be installed at any position, and by connecting the drain outlet to a drain pipe along the wall or the like, water can be drained without interfering with the movement of pedestrians below the ceiling panel.

[0022] In addition, the water that has accumulated at the bottom of the gutter after the leak has stopped is absorbed by the absorbent material and evaporates, reducing the workload required to prevent leaks and slowing the progression of corrosion in the ceiling's structural components, thereby reducing the effort and cost required to maintain the ceiling's structural components. [Brief explanation of the drawings]

[0023] [Figure 1] FIG. 1 is a perspective view showing an embodiment of a ceiling structure according to the present invention from the back side of a ceiling panel of a spandrel. [Figure 2] FIG. 2 is an enlarged cross-sectional view of the main part of the ceiling panel in the direction crossing the convex part of the same; [Figure 3] An enlarged cross-sectional view of the main part along the convex part of the ceiling panel of the same. [Figure 4]Enlarged cross-sectional views of the main parts of the ceiling panel (a) showing the water-stopping sections of the rectangular opening and (b) the round opening, which are made of banks around the edges. [Figure 5] FIG. 1 is a perspective view showing the water-absorbing material and a clip for attaching the material; [Figure 6] 1A and 1B are perspective views showing the process of attaching the water-absorbing material to a ceiling panel using clips, respectively; [Figure 7] A perspective view showing the process of connecting gutters using (a) I-shaped, (b) L-shaped, (c) T-shaped, and (d) cross-shaped joints. [Figure 8] Cross-sectional view showing the process of installing a gutter using the same gutter fittings [Figure 9] FIG. 1 is a perspective view showing an embodiment of a ceiling structure according to the present invention from the back side of a grid-type panel-type ceiling panel. DETAILED DESCRIPTION OF THE INVENTION

[0024] Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

[0025] The ceiling panel 1 of the suspended ceiling shown in Figure 1 is a spandrel made of joined long metal plates 2a, and as shown in Figures 2 and 3, it is stretched under a ceiling substrate 13 that is supported via hangers 12 on hanging bolts 11 hanging down from the ceiling slab. The ceiling substrate 13 is made up of rafter supports 13a and rafters 13b combined in a lattice pattern.

[0026] The long spandrel boards 2a are joined together by folding and interlocking the portions facing the longitudinal side edges that connect to the flat surface 3, and the joints form protrusions 4 that protrude to the back side of the ceiling panel 1.

[0027] As shown in Figure 1, gutters 5 are provided along each edge of the periphery of the ceiling panel 1. The bottom surface of the gutters 5 is set lower in the height direction than the flat surface 3 of the ceiling panel 1, so that water flowing down from the flat surface 3 is caught by the gutters 5.

[0028] The ceiling panel 1 and the gutter 5 are fixed horizontally without any slope to civil engineering structures such as buildings such as station buildings, viaducts, and ceilings of underground spaces.

[0029] Furthermore, ceiling panel 1 has installed thereon equipment 20 such as lighting fixtures and air conditioners so as to protrude through opening 6 to the rear side.

[0030] A water-absorbing material 7 is laid on the back side of the ceiling panel 1, covering the convex portion 4 and extending to the flat surfaces 3 on both sides of the convex portion 4. The water-absorbing material 7 is also laid at the bottom of the gutter 5, and a drain outlet 8 is provided at the bottom of the gutter 5 along the wall 10, facing the position where the water-absorbing material 7 reaches. A drain pipe 9 leading to the outside is connected to the drain outlet 8.

[0031] The water absorbent material 7 should have excellent drainage properties as well as water absorption properties. Specific examples include cellulose-based water absorption mats, cellulose sponges, microfibers, and resin-based nonwoven fabrics such as acrylic. Alternatively, a bag containing a bead-shaped or powder-shaped water absorbent agent with excellent water absorption and drainage properties may be used.

[0032] The drain outlet 8 can be installed at any position depending on the situation inside the station, etc., and can be connected to the drain pipe 9 via a hose or directly to the drain pipe 9 along the wall 10. Also, without connecting the drain pipe 9, the water may be drained via a hose into a sewerage facility such as an underground drain.

[0033] A bank 14 for blocking water leakage is formed around the periphery of the opening 6 on the back side of the ceiling panel 1. As shown in Figure 4(a), when the opening 6 is square, the bank 14 is made of a channel-shaped frame material 14a with a U-shaped cross section sealed with a sealant 14c such as non-drying putty, and as shown in Figure 4(b), when the opening 6 is circular, the bank 14 is made of an angle-shaped frame material 14b with an L-shaped cross section sealed with a sealant 14c such as non-drying putty.

[0034] Such banks 14 and protrusions 4 create blocked areas 21 on the back side of the ceiling panel 1 where the flow of water to the gutter 5 is blocked.

[0035] However, the leaking water that drips into the blocked area 21 is not blocked by the equipment 20 such as lighting fixtures and air conditioning equipment, but instead overcomes the convex portion 4 due to the capillary action of the absorbent material 7, is guided to the flat surface 3 of the ceiling panel 1 that is connected to the gutter 5, and flows out into the gutter 5.

[0036] The water that flows into the gutter 5 is guided to the drain outlet 8 by the capillary action of the water-absorbing material 7 at the bottom of the gutter 5, and is discharged to the outside via a drain pipe 9 connected to the drain outlet 8 without the need to slope the ceiling panel 1 or the gutter 5. This makes construction easy by simply laying the water-absorbing material 7, and the drainage equipment does not interfere with the movement of pedestrians below the ceiling panel 1 within the station premises.

[0037] In addition, the water that has accumulated at the bottom of the gutter 5 after the leak has stopped is absorbed by the water-absorbing material 7 and evaporates, which reduces the workload involved in taking measures against leaks, inhibits the progression of corrosion in the ceiling's structural components, and reduces the effort and cost required to maintain the ceiling's structural components.

[0038] When constructing a ceiling structure with the above-mentioned water leakage prevention measures, clips 15 as shown in Fig. 5 are attached to the water absorbent material 7. Clips 15 are made by bending a thin metal plate, with foot plate portions 15b extending to both sides from insertion portion 15a which is open on the underside, and a pair of bent pieces 15c at the end of each foot plate portion 15b.

[0039] The opening width of the lower surface of the insertion portion 15a is narrower than the width of the protrusion 4 of the ceiling panel 1, and the inner width of the upper portion of the insertion portion 15a is wider than the width of the protrusion 4 of the ceiling panel 1.

[0040] To attach the clip 15 to the water-absorbent material 7, as shown in Figure 6(a), the bent piece 15c of the clip 15 is inserted from below to above into the notches made on both sides of the water-absorbent material 7, and the bent piece 15c is bent to fit along the top surface of the water-absorbent material 7. It is advisable to attach multiple clips 15 to one sheet of water-absorbent material 7.

[0041] With the clip 15 attached to the absorbent material 7 in this manner, the absorbent material 7 together with the clip 15 is inserted from below the ceiling panel 1 through an opening such as an inspection hatch onto the back side of the ceiling panel 1, the absorbent material 7 is positioned at a predetermined location, and the insertion portion 15a of the clip 15 is elastically deformed and pressed against the convex portion 4 of the ceiling panel 1.

[0042] Then, as shown in Figure 6(b), when the insertion portion 15a of the clip 15 is completely fitted into the protrusion 4 of the ceiling panel 1, the insertion portion 15a of the clip 15 returns to its original shape due to its elasticity, and the insertion portion 15a engages with the protrusion 4, thereby fixing the absorbent material 7 to the ceiling panel 1.

[0043] As a result, the absorbent material 7 is laid so that its middle portion covers the convex portion 4 of the ceiling panel 1 and both ends are in contact with the flat surface 3 of the ceiling panel 1, and the clips 15 prevent the absorbent material 7 from shifting position or floating up due to vibration, etc.

[0044] The installation work of the water-absorbing material 7 using such clips 15 can be carried out from the underside of the ceiling panel 1 by utilizing the opening in the ceiling panel 1, and can be carried out even in places where the space behind the ceiling panel is narrow, such as below an elevated slab on which railway tracks are laid.

[0045] Next, to connect the groove members 16, which are the basic components of the gutter 5, to each other, depending on the location and arrangement of the ceiling panel 1, either an I-shaped connecting joint 17a as shown in Figure 7(a), an L-shaped connecting joint 17b as shown in Figure 7(b), a T-shaped connecting joint 17c as shown in Figure 7(c), or a cross-shaped connecting joint 17d as shown in Figure 7(d) is used.

[0046] The groove member 16 is shaped so that its width narrows at both upper sides via steps, allowing it to be elastically deformable. The ends of the connection joints 17a to 17d to which the groove member 16 is connected are slightly smaller than the groove member 16, and a sealing material 18 is attached to the surface.

[0047] The groove member 16 and the connection joints 17a to 17d may be made of a thin metal plate such as stainless steel, aluminum, iron, or copper, or may be made of a resin.

[0048] When connecting the groove member 16 to the connection joints 17a to 17d, the end of the groove member 16 is deformed so that the open width of the upper surface is increased, and the sealing material 18 of the connection joints 17a to 17d is placed over the outside of the attached end, so that as the deformation returns to its original state, the sealing material 18 seals the gap between the connection joints 17a to 17d.

[0049] In addition, when using a T-shaped connection joint 17c as shown in Figure 7(c) or a cross-shaped connection joint 17d as shown in Figure 7(d), a step may be provided to set the height level so that the height level of the bottom surface of the gutter 5 is lower on the downstream side than on the upstream side, or these levels may be made equal.

[0050] To attach the gutter 5 to the ceiling substrate 13, as shown in Figure 8, the gutter mounting bracket 19 is attached to the joist support 13a in advance, and the step on one side of the gutter member 16 of the gutter 5 is engaged with the engagement step 19a on one side of the gutter mounting bracket 19, the gutter member 16 is rotated, and the other side of the gutter member 16 is fixed to the other side of the gutter mounting bracket 19 with screws 19b. In this way, the installation work of the gutter 5 can be done only from the bottom of the ceiling.

[0051] Therefore, the above-mentioned ceiling structure can be installed not only when constructing a new ceiling, but also when renovating part of an existing suspended ceiling.

[0052] In the above embodiment, an example was given in which the ceiling panel 1 is a spandrel. However, as shown in FIG. 9, even if the ceiling panel 1 is a grid-type panel in which square plates 2b are joined together, leaking water can be discharged from the blocked portion 21 of the flat ceiling panel 1 through the gutter 5 by using a ceiling structure that uses a water-absorbing material 7.

[0053] In this case, there are various types of square plates 2b that can be used, such as metal plates such as aluminum plates with the edges bent upward, or metal plates such as aluminum plates with a thickness of about 3 mm that allow the cut surface to be seen, and the above-mentioned ceiling structure can accommodate ceiling panels 1 that use various types of square plates 2b. [Explanation of symbols]

[0054] 1 Ceiling Panel 2a long board 2b square plate 3 flat surface 4 Convex part 5. Gutter 6 Opening 7 Water absorbing material 8 Drain 9 Drain pipe 10 Wall 11 Hanging bolt 12 hanger 13 Ceiling underlayment 13a Noenuke 13b Wild Edge 14 Bank 14a Channel frame material 14b Angle frame material 14c sealing material 15 clips 15a Inset part 15b Foot plate part 15c bent piece 16 Groove member 17a~17d Connection joints 18 Sealant 19 Gutter fittings 19a Engagement stepped portion 19b Bis 20 Equipment 21 Blockage

Claims

1. In a ceiling structure that has gutters along the edges of ceiling panels of a suspended ceiling to prevent water from dripping down the backside of the ceiling panels, The ceiling panel and the gutter are fixed without any slope, and a water-absorbing material is laid on the back side of the ceiling panel so as to cover a convex portion protruding from a flat surface and extend to the flat surfaces on both sides of the convex portion, and a water-absorbing material is also laid at the bottom of the gutter, and a drain outlet is provided at the bottom of the gutter at a position where the water-absorbing material reaches, This ceiling structure has a water leakage prevention feature, in which leaking water dripping onto the backside of the ceiling panel is guided over the convex portion by utilizing the capillary phenomenon occurring in the water-absorbing material, from the ceiling panel to the gutter, and further to the drain outlet of the gutter, and is then drained from the drain outlet.

2. 2. A ceiling structure with water leakage prevention measures as described in claim 1, characterized in that the ceiling panel is a spandrel made by joining long, thin metal plates together at longitudinal joints that form the convex portions.

3. Even if there is a blocked portion on the ceiling panel where the flow of water to the gutter is blocked by the protrusion, A ceiling structure with water leakage prevention measures as described in claim 1, characterized in that leaking water that drips into the blocked area is transported by the absorbent material over the convex portion and moves to the flat surface of the ceiling panel that communicates with the gutter, where it is drained.

4. A construction method for a ceiling structure with water leakage prevention measures as described in any one of claims 1 to 3, characterized in that a clip is attached to the water-absorbing material, and the water-absorbing material is inserted from below the ceiling panel through an opening onto the back side of the ceiling panel and pressed into a predetermined position, so that the clip engages and fixes the water-absorbing material to the ceiling panel.

5. 4. A construction method for a ceiling structure with water leakage prevention measures according to any one of claims 1 to 3, characterized in that the groove members of the gutter are connected via connecting joints shaped according to the location and arrangement of the ceiling panels.

6. A construction method for a ceiling structure with water leakage prevention measures as described in any one of claims 1 to 3, characterized in that a gutter fitting is attached to the ceiling substructure in advance, an engaging step portion on one side of the gutter is engaged with an engaging step portion on one side of the gutter fitting, the gutter is rotated, and the other side of the gutter is fixed to the other side of the gutter fitting.

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