Protective cover for drainage collecting pipe

Abstract

To provide a protective cover for a drainage collecting pipe that can suppress or prevent cracking or chipping of a resin-made socket member even when a heavy object hits the drainage collecting pipe under construction.SOLUTION: A protective cover 1000 attached to a drainage collecting pipe 100 under construction includes a removable fixing member 1010 attachable to an upper pipe 140, and a cover member 1020 connected above the fixing member 1010, and having an outer peripheral edge positioned outward of the position of a horizontal branch pipe socket member 146 when attached to the upper pipe 140 by the fixing member 1010. A diameter φD of the cover member 1020 constituting the protective cover 1000 is larger than a diameter φd of a circle passing through the tip of the horizontal branch pipe socket member 146, thereby effectively protecting the resin-made horizontal branch pipe socket member 146.SELECTED DRAWING: Figure 11

Description

[Technical field]

[0001] The present invention relates to a protective cover for a drainage collector pipe (not limited to being made of cast iron or resin) installed in a through hole of a floor slab of a building, which can suppress or avoid the possibility that the drainage collector pipe will hit and crack or chip when the pipe support by the shoring falls over during construction of the drainage collector pipe penetrating the floor slab (for example, when the pipe support by the shoring (for example, two steel pipes are assembled above and below and fixed to support the frame of the floor slab support)) and the drainage collector pipe will crack or chip (the present invention suppresses or prevents cracks or chips in the drainage collector pipe, and the cause of the cracks or chips is not limited, so this possibility is not limited to being caused by the pipe support by the shoring). Here, during construction of the drainage collector pipe penetrating the floor slab, the drainage collector pipe has risen to the floor of the F floor and the drainage collector pipe up to the F floor has been installed, and the pipe support is used for formwork support when constructing the floor of the F+1 floor (pouring concrete). Concrete is poured onto the rebars laid for the F+1 floor (at this time, the drainage manifold for the F+1 floor has not yet been installed), and the F+1 floor is constructed. After this, it is expected that the most common case will be when the pipe supports are removed to remove the formwork for the F+1 floor, causing the pipe supports to tip over. [Background technology]

[0002] Water supply and drainage facilities are installed in apartment buildings, office buildings, etc. Of these, the most widely known drainage facilities are those with a drainage piping structure that includes vertical pipes (standpipe, upper standpipe, lower standpipe, upper pipe, lower pipe) that run vertically through each floor of the building, horizontal pipes (horizontal branch pipes, branch pipes) installed on each floor, and a drainage collector pipe (also called a drainage pipe joint, drainage pipe joint, or drainage collector joint) that connects them.

[0003] When installed in a building, such a drainage collecting pipe comprises an upper pipe (main body, pipe body) that is placed in the through hole of the floor slab and a lower pipe that is glued below the upper pipe, and the upper pipe has an upper pipe connection portion at its upper end that can be connected to an upper pipe (upper vertical pipe) on the upstream side (upper floor side) and a horizontal branch pipe connection portion on its side that can be connected to a horizontal branch pipe, and the lower pipe (if not for the lowest floor) has a swirl vane and a lower pipe connection portion for connecting a lower pipe (lower vertical pipe) that drains drainage to the lower floor, or (if for the lowest floor) has a lower pipe connection portion that has a reduced diameter section and connects (directly or via a separate piping) a foot bend pipe that drains drainage to the horizontal main pipe.

[0004] During construction of a drainage collector pipe that penetrates a floor slab, if the upper part of the drainage collector pipe (upper pipe connection part) is left open, there is a problem that unwanted objects may accidentally enter the drainage collector pipe. As a solution to this problem, it is considered to use a pipe end closure device disclosed in Design Publication No. 1222118 (Patent Document 1) to suppress or prevent unwanted objects from accidentally entering from the upper part of the drainage collector pipe (upper pipe connection part). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Design No. 1222118 Summary of the Invention [Problem to be solved by the invention]

[0006] Incidentally, when a drainage collector pipe that penetrates a floor slab is being constructed (particularly during the work of removing the pipe support when removing the formwork for the F+1 floor after the F+1 floor has been constructed as described above), for example, if the pipe support falls over and hits the drainage collector pipe, the drainage collector pipe may crack or chip. However, with drainage collector pipes whose main body is made of resin and have a resin receiving member attached to the horizontal branch pipe connection section, or with cast iron drainage collector pipes whose receiving port is integrated with the main body, there is a problem that even if the pipe end closure device disclosed in Patent Document 1 is used, the receiving port member or receiving port is located on the outer periphery side of the outer edge of the pipe end closure device, and therefore the possibility of cracking or chipping cannot be completely eliminated.

[0007] The present invention was developed in consideration of the above-mentioned problems, and its purpose is to provide a protective cover for a drainage collector pipe (not limited to being made of cast iron or resin) that is installed in a through hole in the floor slab of a building, which can reduce or avoid the possibility of the drainage collector pipe being hit and cracked or chipped when, for example, a pipe support of a shoring structure falls over. [Means for solving the problem]

[0008] In order to achieve the above object, the protective cover for a drainage collecting pipe according to the present invention employs the following technical measures.

[0009] The protective cover for a drainage collection pipe of the present invention is a protective cover for a drainage collection pipe installed in a through hole in the floor slab of a building, wherein the drainage collection pipe includes an upper pipe protruding above the floor slab and a lower pipe located below the upper pipe, the upper pipe includes an upper pipe connection portion connecting an upper pipe through which drainage water flows in from the upper floor and an upper pipe receiving member provided at the upper pipe connection portion, at least one horizontal branch pipe connection portion connecting a horizontal branch pipe above the floor slab and a horizontal branch pipe receiving member provided at the horizontal branch pipe connection portion, and the protective cover includes a fixing member that is removable for the upper pipe, and a cover member connected above the fixing member, wherein when attached to the upper pipe by the fixing member, the outer peripheral edge of the cover member is positioned outward from the position of the horizontal branch pipe receiving member.

[0010] Preferably, the cover member is made of resin.

[0011] More preferably, the cover member can be made of polycarbonate.

[0012] More preferably, the fixing member can be configured to be attached to the upper tube so as to hold the outside of the upper tube.

[0013] More preferably, the fixing member is provided with a slip-out prevention portion that can move toward and away from the outer peripheral surface of the upper tube, and the slip-out prevention portion can be placed on the outside of the upper tube while being spaced away from the outer peripheral surface, and then the slip-out prevention portion can be brought closer to the outer peripheral surface so that the slip-out prevention portion directly or indirectly abuts against the outside of the upper tube, thereby attaching the fixing member to the upper tube.

[0014] More preferably, the anti-slip portion has two approximately semicircular portions covering the outer periphery of the upper tube, the ends of a pair of band bodies are connected to each other by a hinge, and the end opposite the ends connected by the hinge is provided with a fastening hole through which a bolt and nut screwing member can be inserted, and the ends of the band bodies at the opposite end are separated from each other to separate the anti-slip portion from the outer periphery and the anti-slip portion is placed on the outside of the upper tube, and then the opposite ends are fastened to each other by the screwing member so that the band body approaches the outer periphery of the upper tube until it abuts the outer periphery of the upper tube and the fixing member is attached to the upper tube, and the approximately semicircular upper end surface of one of the band bodies is fixed to the cover member.

[0015] More preferably, the anti-slip portion has two approximately semicircular portions covering the outer periphery of the upper tube, the ends of a pair of band bodies are connected to each other by a hinge, and the end opposite the ends connected by the hinge is provided with a fastening hole through which a bolt and nut screwing member is inserted, and the ends of the band bodies at the opposite ends are separated from each other to separate the anti-slip portion from the outer periphery and the anti-slip portion is placed on the outside of the upper tube, and then the opposite ends are fastened to each other by the screwing member so that the band body comes close to the outer periphery of the upper tube and abuts against the outer periphery of the upper tube, and the fixing member is attached to the upper tube, and the approximately semicircular upper end surface of one of the band bodies is fixed to a circular plate which is smaller than the outer diameter of the cover member, and the cover member which is separate from the circular plate is removably attached to the circular plate.

[0016] More preferably, the circular plate is made of metal, and the cover member is made of resin. It can be configured as follows.

[0017] More preferably, the circular plate and the cover member are attached via a resin member for absorbing shock.

[0018] More preferably, a resin member for absorbing shock may be provided on the inner peripheral side of the band body.

[0019] More preferably, when attached to the upper tube by the fixing member, the opening side end face of the upper tube (more specifically, the upper end face of the upper tube receiving member) faces the underside of the protective cover (the underside of the circular plate if a circular plate is provided, or the underside of the cover member if a circular plate is not provided) (it is sufficient that they face each other, and they may abut and face each other, or they may face each other with a gap), and the underside is provided with a cushioning material facing at least a portion of the opening side end face (it is sufficient that they face each other, and they may abut and face each other, or they may face each other with a gap).

[0020] More preferably, the anti-slip portion includes a pneumatic member that is a donut-shaped hollow rubber body and, unless air is injected, the inside of the donut shape does not expand and the inner diameter of the donut shape does not come into contact with the outer peripheral surface, but when air is injected, the inside of the donut shape expands and the inner diameter of the donut shape comes into contact with the outer peripheral surface, and the anti-slip portion can be configured such that without injecting air into the hollow body, the inner diameter of the donut shape is larger than the outer peripheral surface, and the anti-slip portion is placed on the outside of the upper tube in a state where it is separated from the outer peripheral surface, and then, by injecting the air, the hollow body expands inwardly and the inner diameter of the donut shape approaches the outer peripheral surface until it comes into contact with the outer peripheral surface, so that the fixing member is attached to the upper tube.

[0021] More preferably, the anti-slip portion includes a substantially circular band body having a diameter equal to or greater than the outer diameter of the upper tube and covering the outer periphery of the upper tube, a plurality of female threaded members provided on the band body, and a male threaded member that approaches the outer periphery as the male threaded member is screwed into the female threaded member and the screwing of the male threaded member progresses, and the anti-slip portion can be placed on the outside of the upper tube in a state in which the male threaded member is retracted from the screwing of the male threaded member with the female threaded member and the tip of the male thread is separated from the outer periphery surface, and the male threaded member is then screwed into the female threaded member until the tip of the male thread approaches the outer periphery of the upper tube directly or indirectly and the fixing member is attached to the upper tube.

[0022] More preferably, the fixing member can be configured to be attached to the upper tube so as to hold the inside of the upper tube.

[0023] More preferably, the fixing member is provided with a slip-out prevention portion that can move toward and away from the inner surface of the upper tube, and the slip-out prevention portion can be placed on the inside of the upper tube while being separated from the inner surface, and then the slip-out prevention portion can be brought toward the inner surface so that the slip-out prevention portion abuts against the inside of the upper tube, thereby attaching the fixing member to the upper tube.

[0024] More preferably, the anti-slip portion comprises an operating portion provided above the cover member, and an arm portion connected below the operating portion via a vertically long rod and capable of extending and contracting in an approximately horizontal plane by operating the operating portion, and the arm portion can be configured such that the arm portion is contracted so that the tip of the arm portion is separated from the inner circumferential surface and the anti-slip portion is placed inside the upper tube, and then the arm portion is extended so that the tip of the arm portion approaches the inner circumferential surface until it abuts against it, thereby attaching the fixing member to the upper tube.

[0025] More preferably, the fixing member can be configured to be attached to the upper tube by extending the arm portion until the tip of the arm portion abuts the inner surface and engages with a drip edge inside the upper tube.

[0026] More preferably, the anti-slip portion is a cylindrical hollow rubber body, and includes an air pressure member such that when air is not injected, the cylinder does not bulge outward and the outer diameter of the cylinder does not contact the inner circumferential surface, and when air is injected, the cylinder bulges outward and the outer diameter of the cylinder contacts the inner circumferential surface, and the anti-slip portion can be configured such that without injecting air into the hollow body, the outer diameter of the cylinder is smaller than the inner circumferential surface and the anti-slip portion is placed inside the upper tube while separated from the inner circumferential surface, and then the air is injected to cause the hollow body to bulge outward and the outer diameter of the cylinder to approach the inner circumferential surface until it contacts the inner circumferential surface, thereby attaching the fixing member to the upper tube. Effect of the Invention

[0027] According to the present invention, it is possible to provide a protective cover for a drainage collector pipe (not limited to being made of cast iron or resin) that is installed in a through hole in the floor slab of a building, which can reduce or avoid the possibility of the drainage collector pipe being hit and cracked or chipped when, for example, a pipe support of a shoring structure falls over. [Brief description of the drawings]

[0028] [Figure 1] FIG. 1 shows a drainage piping structure in which a drainage collecting pipe 100 to which a protective cover according to an embodiment of the present invention can be suitably applied is adopted, in which (A) is a perspective view showing a state in which the drainage collecting pipe 100 has an upper outer layer member 600 and an outer layer member 700, and (B) is a perspective view showing a state in which the drainage collecting pipe 100 does not have an upper outer layer member 600 and an outer layer member 700. [Diagram 2]1A is a perspective view showing a drainage collecting pipe 100 in a state where the drainage collecting pipe 100 is filled with a heat-expandable fire-resistant material 116, and FIG. 1B is a perspective view showing a state where the drainage collecting pipe 100 is not filled with a heat-expandable fire-resistant material 116. [Diagram 3] FIG. 3A is an exploded view of the drainage collecting pipe 100 shown in FIG. 2B, and FIG. 3B is a perspective view of the lower pipe 110 seen through the pipe wall. [Figure 4] FIG. 2 is a two-sided view of the drainage collecting pipe 100. [Diagram 5] (A) A cross-sectional view of 5A-5A in Figure 4(A), (B) an enlarged cross-sectional view of the outer layer member 700 in Figure 5(A), (C) an enlarged cross-sectional view of the outer layer member 700 in Figure 5(B) when the outer layer member 700 is attached to the upper tube 140 via a rubber ring 900, and (D) a partial cross-sectional view of 5A-5A when the thermally expandable fire-resistant material 116 is not filled. [Figure 6] 13 is a diagram for explaining a method of attaching an upper outer layer member 600 to a drainage collecting pipe 100. FIG. [Figure 7] 1A to 1C are five views showing the external shape of a protective cover 1000 according to an embodiment of the present invention. [Figure 8] 1A is a perspective view of a protective cover 1000 according to an embodiment of the present invention as viewed obliquely from the side, and FIG. [Figure 9] 1A and 1B are perspective views of a protective cover 1000 according to an embodiment of the present invention, seen obliquely from below, showing a state in which a slip-off prevention portion is separated from an upper tube and a state in which it is close to the upper tube. [Figure 10] 1 is a perspective view showing a state in which a protective cover 1000 according to an embodiment of the present invention is attached to a drainage collecting pipe 100. FIG. [Figure 11] 1A to 1C are two-sided views showing a state in which a protective cover 1000 according to an embodiment of the present invention is attached to a drainage collecting pipe 100. [Figure 12] FIG. 2 is a perspective view of a protective cover 2000 according to a first modified example of the embodiment of the present invention. [Figure 13] FIG. 11 is a diagram illustrating a protective cover 3000 according to a second modified example of the embodiment of the present invention. [Figure 14]FIG. 13 is a diagram illustrating a protective cover 4000 and a protective cover 4001 according to a third modified example of the embodiment of the present invention. [Figure 15] FIG. 13 is a diagram illustrating a protective cover 5000 according to a fourth modified example of the embodiment of the present invention. [Figure 16] FIG. 13 is a diagram illustrating a protective cover 5001 according to a fourth modified example of an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0029] In the following, a protective cover 1000 according to an embodiment of the present invention is preferably applied to a drainage collecting pipe 100, and when the drainage collecting pipe 100 is being installed on a floor slab and is supported by a support, the protective cover 1000 can suppress or avoid the possibility of the drainage collecting pipe being hit and cracked or chipped when the (heavy) pipe support falls over. In the following description, the drainage collecting pipe 100 to which the protective cover 1000 is preferably applied will be described in detail with reference to Figs. 1 to 6. Then, the protective cover 1000 (including the protective cover 2000 according to the first modified example and the protective cover 3000 according to the second modified example) will be described in detail with reference to Figs. 7 to 13. Furthermore, the protective cover 4000 (the protective cover 4000 according to the third modified example) will be described in detail with reference to Fig. 14, and the protective cover 5000 and the protective cover 5001 (the protective cover 5000 and the protective cover 5001 according to the fourth modified example) will be described in detail with reference to Figs. 15 and 16. In the following description, the outer peripheral surface, the outer surface, and the outside, the outer layer side, the outer peripheral side, and the outside, the inner layer side, the inner peripheral side, and the inside, the thermally expandable fireproof material, the fireproof material, and the thermally expandable material may not be clearly distinguished from each other. In addition, in order to easily understand the present invention, the direction of the horizontal branch pipe may be specified using the hour hands of a clock as 0 o'clock, 3 o'clock, 6 o'clock, and 9 o'clock (FIG. 4). In addition, the symbols (consisting of numbers and (if necessary) letters) attached to the dashed dotted lines in the figures indicate the figure number with the numbers and the branch number (A, B, C, etc.) in the figures, and the figures identified by the symbols show cross-sectional views (FIG. 4(A), FIG. 5(A)).

[0030] Hereinafter, a drainage collecting pipe 100 to which a protective cover 1000 according to an embodiment of the present invention is preferably applied will be described in detail with reference to the drawings. As shown in Figs. 1 to 6, the drainage piping structure using this drainage collecting pipe 100 has a non-fireproof resin drainage collecting pipe 100 provided in a through hole that vertically penetrates a floor slab in a building, and a resin drainage standpipe (upper floor side drainage standpipe 220 (sometimes simply referred to as upper pipe 220) 220 that allows drainage water from the upper floor to flow in and lower floor side drainage standpipe 230 (sometimes simply referred to as lower pipe 230) that allows drainage water to flow down to the lower floor) connected to this drainage collecting pipe 100. Here, "non-fireproof" refers to a property that can be deformed, melted or burned by heat caused by a fire that occurs in a building, and for example, a resin-made one corresponds to this. The drainage collecting pipe to which the protective cover 1000 of the embodiment of the present invention is preferably applied may be made of cast iron rather than resin (the receiving member is made of resin), but in the following description, the drainage collecting pipe to which the protective cover 1000 of the embodiment of the present invention is preferably applied will be described as being made of resin.

[0031] The drainage collector pipe 100 and the drainage riser pipe (upper floor drainage riser pipe 220 (upper pipe 220) and lower floor drainage riser pipe 230 (lower pipe 230)) are formed of, for example, polyvinyl chloride, polyethylene, polybutene, polypropylene, nylon, or the like. The drainage riser pipe may be, for example, a so-called fire-resistant two-layer pipe. As shown in FIG. 3(A), the drainage collector pipe 100 is formed of one or more resin injection moldings (here, as an example, six pieces: an upper pipe 140, a lower pipe 110, an upper pipe receiving member 144, and a horizontal branch pipe receiving member 146 × 3). As shown in FIG. 1 to FIG. 3, the drainage collector pipe 100 is a resin drainage collector pipe arranged in a through hole of the floor slab of a building, and includes an upper pipe 140 protruding above the floor slab and a lower pipe 110 bonded below the upper pipe 140. The upper pipe 140 includes an upper pipe connection part 143 to which an upper pipe receiving member 144 is attached for connecting an upper pipe 220 through which wastewater flows in from the upper floor, and at least one (three in this case) horizontal branch pipe connection part 142 to which a horizontal branch pipe receiving member 146 for connecting a horizontal branch pipe above the floor slab is attached. The lower pipe 110 includes a lower pipe connection part 130 that connects a lower pipe 230 through which wastewater flows out to the lower floor. Resin receiving members (more specifically, an upper pipe receiving member 144 and a horizontal branch pipe receiving member 146) are attached to the upper pipe connection part 143 and the horizontal branch pipe connection part 142, respectively.

[0032] Here, in the case where the drainage collecting pipe 100 is not for the lowest floor, as shown in Fig. 3(A) and Fig. 3(B), as an example, a swirl vane 114 is formed as a protruding part protruding from the inner surface of the lower pipe 110 above the lower pipe connection part 130 in the lower pipe 110, and a recess 112 corresponding to this protruding part (here, the swirl vane 114) is formed on the outer surface of the lower pipe 110, and the part of this recess 112 is filled with a thermally expandable fireproof material 116. Note that filling this recess 112 with the thermally expandable fireproof material 116 is an optional matter in the drainage collecting pipe to which the protective cover of the present invention is applied, and does not prevent the protective cover of the present invention from being applied to a drainage collecting pipe in which the thermally expandable fireproof material 116 is not filled in the recess 112, as shown in Fig. 5(D) described later. 5(D), in addition to the recess 112 not being filled with the thermal expansion material 116, the thermally expandable fire-resistant material 712 is provided only at one upper location, not at two upper and lower locations, and a vibration-damping material 714 is provided at the lower location where the thermally expandable fire-resistant material 712 was provided. This does not preclude the application of the protective cover according to the present invention to a drainage collecting pipe in which the thermally expandable fire-resistant material 712 is provided only at one upper location, not at two upper and lower locations.

[0033] Here, although not limited thereto, the thermally expandable fireproof material 116 is formed in a putty-like form, and is filled in the depression 112 on the outer surface of the lower pipe 110 of the drainage collecting pipe 100 so as to be filled up to the outer diameter of the lower pipe 110 (an amount sufficient to realize the desired fire resistance). Therefore, the outer diameter of the lower pipe 110 of the drainage collecting pipe 100 is approximately the same as that of a conventional drainage pipe joint. In this way, as shown in FIG. 1(B), the thermally expandable fireproof material 116 itself (not resin-containing but pure) is filled in the portion of the depression 112 corresponding to the protruding portion (the swirl vane 114). Note that this thermally expandable fireproof material and its arrangement are merely one example.

[0034] When such a drainage collecting pipe 100 is installed in a through hole that penetrates the floor slab in the building from top to bottom, as shown in Fig. 1 (A), the depression 112 of this protruding part (swirl vane 114) is formed so that at least a part of it corresponds to at least a part of the range from the upper end to the lower end of the floor slab when installed in the building. Note that this protruding part is not limited to the swirl vane 114 as long as it is a part that changes the flow of drainage in the drainage collecting pipe 100, but may be a deflector plate or the like, and is not limited to either the swirl vane or the deflector plate as long as it forms a corresponding depression 112 on the outer surface of the lower pipe 110.

[0035] Furthermore, it is preferable that the outer layer of the thermally expandable fireproof material 116 is provided with an outer layer member 700 having fire resistance and vibration suppression properties, which is wrapped around the outer periphery of the lower pipe 110 in a cylindrical shape, and this outer layer member 700 may cover the lower part of the upper pipe 140 in a cylindrical shape. The outer layer member 700 will be described with reference to the two-sided view of the drainage collecting pipe 100 shown in FIG. 4 and the cross-sectional view shown in FIG. 5. As shown in these figures, an example of the outer layer member 700 has a three-layer structure, and is provided so as to cover the outer periphery of the lower pipe 110, including the case where it covers the lower part of the upper pipe 140 of the drainage collecting pipe 100, in this order from the outer surface of the drainage collecting pipe 100, including the case where it covers the lower part of the upper pipe 140 of the drainage collecting pipe 100. As an example, the vibration-damping material 714 of the innermost layer 710 is formed containing a butyl-based (butyl rubber, etc.) or asphalt-based (rubber asphalt, modified asphalt, etc.) material, the sound-insulating cover 730 of the outermost layer is formed containing a rubber-based (EPDM (ethylene propylene diene rubber) etc.), elastomer-based or resin-based material (it may be made of not only soft materials such as rubber but also hard PVC), and the vibration insulator 720 formed of fire-resistant inorganic fibers in the middle layer is formed from an aggregate of inorganic fibers having fire resistance (glass wool, rock wool, ceramic fiber, etc.). Note that there is a portion in the innermost layer 710 where a thermally expandable fire-resistant material 712 is provided instead of the vibration-damping material 714. That is, the outer layer member 700 of the three-layer structure is composed of the thermally expandable fire-resistant material 712 or the vibration-damping material 714 of the innermost layer 710, the vibration insulator 720 of the middle layer, and the sound-insulating cover 730 of the outermost layer. In addition, except that the outer layer member 700 has a structure of two or more layers, the outer layer member 700 having a three-layer structure and being made of such a material are not limited in the present invention. In addition, this outer layer member and its structure are merely one example.

[0036] In addition to the outer layer member 700, the upper outer layer member 600 of the drainage collecting pipe 100 covers the upper end of the outer layer member 700 to the upper end of the upper pipe receiving member 144 in advance (for example, during the manufacturing process at the drainage collecting pipe manufacturing factory) as shown in Figures 1 and 6 (A). This upper outer layer member 600 has a function of mainly exhibiting sound insulation and / or sound absorption properties, and has a planar shape in the developed state (state before attachment to the drainage collecting pipe 100) shown in the development view of Figure 6 (B), and has a cylindrical shape in the installed state (state after attachment to the drainage collecting pipe 100) shown in the side view of Figure 6 (A). As shown in Figure 6 (B), this upper outer layer member 600 is provided with circular holes 602 (three in this case) through which the horizontal branch pipe connecting portion 142 passes, and is provided with locking holes 604 (three in this case) that are locked to the rib 144R provided on the outer circumferential surface of the upper pipe receiving member 144. Felt, glass wool, rock wool, etc. are preferably used as the material for this upper outer layer member 600. This upper outer layer member and its structure are merely one example.

[0037] 3(A) and 4, the upper pipe 140 in this drainage collecting pipe 100 is composed of a water collection chamber (no reference number) equipped with an upper pipe connection section 143 that connects the upper pipe 220 via an upper pipe receiving member 144 and side branch pipe connection sections 142 that connect side branch pipes at three locations at 90° intervals in top view via side branch pipe receiving members 146, the upper pipe receiving member 144, and three side branch pipe receiving members 146. Here, the number of side branch pipe connection sections is not limited, and although not limited, the side branch pipe receiving member 146 may be one that connects a side branch pipe without reducing its diameter (side branch pipe receiving member shown in the figure) or one that connects a side branch pipe with a reduced diameter.

[0038] Furthermore, in the manufacturing plant for this drainage collecting pipe 100, the drainage collecting pipe 100 is formed from the six resin injection-molded products shown in Fig. 3(A) as described above, and the joints between these separate injection-molded products shown in Fig. 3(A) are bonded with an adhesive. Here, although not directly related to the present invention, the letter M immediately following the number of the reference numeral in Fig. 3(A) indicates the male side, and the letter F indicates the female side. Note that the present invention is not limited to the number and shape of the injection-molded products that make up the drainage collecting pipe, but is preferably applied to a drainage collecting pipe having the following configuration.

[0039] A drainage collecting pipe to which the protective cover according to the present invention is suitably applied has the following configuration. This drainage collecting pipe 100 is a resin drainage collecting pipe that is installed in a through hole in the floor slab of a building as shown in Fig. 1. As shown in Figs. 1 to 6, this drainage collecting pipe 100 includes an upper pipe 140 that protrudes above the floor slab, a lower pipe 110 that is bonded to the lower part of the upper pipe 140, an outer layer member 700 consisting of at least two layers (three layers in this case) provided on the outer periphery from the lower part of the branch of the drainage collecting pipe 100 (the lower part of the branch refers to the vicinity immediately below the horizontal branch pipe connecting part 142 in the upper pipe 140) to the lower pipe 110, and an upper outer layer member 600 that covers from the upper end of the outer layer member 700 to the upper end of the upper pipe receiving member 144. This upper pipe 140 includes an upper pipe connection part 143 that connects an upper pipe 220 through which wastewater flows in from the upper floor, and at least one (three in this case) horizontal branch pipe connection part 142 that connects a horizontal branch pipe above the floor slab, and a resin upper pipe receiving member 144 is bonded to the upper pipe connection part 143, and a resin horizontal branch pipe receiving member 146 is bonded to the horizontal branch pipe connection part 142. Also, as shown in Fig. 5(A) (only), the drainage collecting pipe 100 may be provided with a rubber ring 144G on the upper pipe receiving member 144 and a rubber ring 146G on the horizontal branch pipe receiving member 146, respectively (as optional configurations).

[0040] The outer layer member 700 of the drainage collecting pipe 100 includes an inner side member (here, the heat-expandable fire-resistant material 712 or vibration-damping material 714 of the innermost layer 710, and the vibration insulator 720 of the middle layer) and an outer side member (here, the sound-insulating cover 730 of the outermost layer) that is attached to the drainage collecting pipe 100 so as to cover the outer periphery of the inner side member, and the inner side member (heat-expandable fire-resistant material 712 or vibration-damping material 714 and vibration insulator 720) is not present at least at the upper end (which will form the upper water-stopping portion WP(U)) and lower end (which will form the lower water-stopping portion WP(D)) of the outer side member (sound-insulating cover 730), and the outer side member (sound-insulating cover 730) has water-stopping properties to prevent the inner side member from coming into contact with water and is attached to the upper pipe 140 and lower pipe 110 of the drainage collecting pipe 100 directly, as shown in Figure 5(B), or using a rubber ring 900, which is another member, as shown in Figure 5(C). Here, the inner peripheral member (particularly the aggregate of inorganic fibers preferably used as the vibration insulator 720) has a property that its function is reduced when it comes into contact with water. For this reason, to ensure water-stopping properties, more specifically, but not limited to, the outer peripheral member (sound insulation cover 730) is attached to the upper pipe 140 and the lower pipe 110 of the drainage collecting pipe 100 (and further via the rubber ring 900) with an adhesive to provide water-stopping properties.

[0041] The protective cover 1000 of the present invention (including the protective cover 2000 relating to the first modified example and the protective cover 3000 relating to the second modified example) is intended for a drainage collection pipe manufactured in this manner by bonding together resin injection-molded products and attaching an outer layer member (bonded with an adhesive), and is preferably used at a drainage collection pipe construction site, and can suppress or avoid the possibility of the drainage collection pipe (equipped with a resin receiving member) being hit and cracked or chipped when, for example, a pipe support provided by shoring falls over (this possibility is not limited to being caused by the pipe support provided by shoring falling over).

[0042] The protective cover 1000 according to the present invention will be described in detail below with reference to FIGS.

[0043] As shown in these figures, the protective cover 1000 includes a fixing member 1010 that is detachable from the upper pipe 140, and a cover member 1020 that is connected above the fixing member 1010, and when the cover member 1020 is attached to the upper pipe 140 by the fixing member 1010, the outer periphery of the cover member 1020 is located outward from the position of the side branch pipe receiving member 146. That is, as shown in FIG. 11, the diameter φD of the cover member 1020 that constitutes the protective cover 1000 is larger than the diameter φd of a circle that passes through the tip of the side branch pipe receiving member 146, and the resin-made side branch pipe receiving member 146 can be preferably protected. The shape of the cover member 1020 is not limited to a circle. In addition, since the protective cover 1000 is attached to the upper pipe 140 by the fixing member 1010, it is natural that the resin-made upper pipe receiving member 144 can be preferably protected. Therefore, the protective cover 1000 can protect the entire drainage collecting pipe 100, including various receiving members.

[0044] Here, the cover member 1020 is preferably made of resin, particularly polycarbonate. If it is made of resin, it is lightweight and easy to carry, and if it is made of polycarbonate, it has excellent impact resistance, and even if the pipe support by the shoring falls and hits the side branch pipe receiving member 146, it can absorb the impact and preferably suppress or avoid damage to the side branch pipe receiving member 146. Furthermore, if the cover member 1020 is in a thin disk shape as shown in the figure, in addition to being easy to carry, it does not take up much space when not in use and has excellent storage efficiency. Furthermore, if the cover member 1020 is in a thin disk shape, if it is made of (thin) metal, it is inferior in durability and will deform with repeated use, but if it is made of resin (particularly polycarbonate), it has excellent durability and is unlikely to deform even with repeated use.

[0045] Moreover, it is preferable that the fixing member 1010 is attached to the upper pipe 140 so as to hold the outside of the upper pipe 140 of the drainage collecting pipe 100. For example, the protective cover 1000 shown in Figures 7 to 10 and the protective cover 2000 (pertaining to a first modified example) shown in Figure 12 described below correspond to this outer holding type (the protective cover 3000 (pertaining to a second modified example) shown in Figure 13 corresponds to an inner holding type rather than the outer holding type).

[0046] It is also preferable that the fixing member 1010 has a slip-out prevention part (roughly a pair of semicircular band bodies 1010R1 and 1010R2 connected by hinges 1016 shown in FIG. 9, or a substantially circular elastically deformable band body 2010 without hinges shown in FIG. 12) that can approach and move away from the outer circumferential surface of the upper pipe 140 of the drainage collecting pipe 100. Then, it is preferable that the slip-out prevention part is placed on the outside of the upper pipe 140 in a state where it is separated from the outer circumferential surface, and then the slip-out prevention part is brought close to the outer circumferential surface so that the slip-out prevention part directly or indirectly (indirectly, for example, via the upper outer layer member 600) abuts against the outside of the upper pipe 140, and the fixing member 1010 is attached to the upper pipe 140. Note that the band body and the band body are often made of metal.

[0047] Furthermore, as shown in Figures 7 to 9, the anti-slip portion is preferably formed by connecting the ends of a pair of band bodies (band body 1010R1 and band body 1010R2) which are approximately semicircular and cover the outer periphery of the upper pipe 140 of the drainage collecting pipe 100 with a hinge 1016, and the end opposite to the ends connected by the hinge 1016 is preferably provided with a fastening hole 1018 through which the screw-on members of the bolt 1018B and nut 1018N are inserted. In the slip-out prevention part having such a structure, the ends of the band body (band body 1010R1 and band body 1010R2) are separated from each other at the end on the opposite side to the hinge 1016, and the slip-out prevention part is placed on the outside of the upper pipe 140 in a state where the slip-out prevention part is separated from the outer circumferential surface of the upper pipe 140 of the drainage collecting pipe 100, and then the ends on the opposite side to the hinge 1016 are fastened to each other with a screw member (bolt 1018B and nut 1018N) using the fastening hole 1018, and the band body (band body 1010R1 and band body 1010R2) are brought close to each other until they abut against the outer circumferential surface of the upper pipe 140, and the fixing member 1010 is attached to the upper pipe 140. In addition, the upper end surface of the approximately semicircular shape of one of the band bodies (here, the band body 1010R2) is fixed to the cover member 1020. 9(A) (which is smaller than the outer diameter of the cover member 1020), the substantially semicircular upper end surface of one of the band bodies (here, the band body 1010R2) is directly fixed to the cover member 1020 (without the circular plate 1014). By providing such a structure, that is, although attachment and removal are easy using the versatile screw members (bolts 1018B and nuts 1018N), it is difficult to come off unless the fastening by the screw members is released, and tampering (such as putting dirt in the vertical pipe) can be suitably prevented.

[0048] Here, the protective cover according to the present invention is not limited to the one in which the substantially semicircular upper end surface of one band body (here, band body 1010R2) is directly fixed to the cover member 1020 as described above. As shown in Fig. 9(A), it is also preferable that the substantially semicircular upper end surface of one band body (here, band body 1010R2) is fixed to a circular plate 1014 having a smaller outer diameter than the cover member 1020, and the cover member 1020 separate from the circular plate 1014 is removably attached to the circular plate 1014. With such a configuration, it is possible to easily replace only the cover member 1020 according to the size of φd shown in Fig. 11, for example.

[0049] In the case where the substantially semicircular upper end surface of one of the band bodies (here, the band body 1010R2) is removably attached to the cover member 1020 via a circular plate 1014 as shown in FIG. 9, it is preferable that the circular plate 1014 is made of metal and the cover member 1020 is made of resin. Since the cover member 1020 is made of resin, it is preferable that it has higher impact resistance than the metallic circular plate 1014 and is less likely to deform. In addition, it is preferable that the circular plate 1014 and the cover member 1020 are attached via a rubber washer 1006 (an example of a resin member for absorbing impact), and it is also preferable to provide a rubber washer 1004 on the upper surface of the cover member 1020. These rubber washers stabilize the seating surface, have a high anti-loosening effect, are superior in being lighter than metal, and do not rust, unlike metal washers. In addition, it is preferable that rubber 1012 (an example of a resin member for absorbing impact) is provided on the inner periphery of the band body 1010R1 and the band body 1010R2. This rubber 1012 increases the adhesion between the band main body 1010R1 and the band main body 1010R2 and the upper pipe 140 (or the upper outer layer member 600) of the drainage collecting pipe 100, and enables the band main body 1010R1 and the band main body 1010R2 to be firmly attached to the upper pipe 140 (or the upper outer layer member 600) of the drainage collecting pipe 100. Here, these rubber washers 1006 and the rubber 1012 are merely examples of resin members for shock absorption, and such resin members for shock absorption include rubber, elastomer, thermoplastic resin, thermosetting resin, and the like.

[0050] The cover member 1020 and the circular plate 1014 are fixed to each other by means of a bolt 1002 and a nut 1008 via a rubber washer. A rubber sheet of an appropriate size may be used instead of the rubber washer. Fig. 10 shows a perspective view of the protective cover attached to the upper pipe of the drainage collecting pipe 100.

[0051] Although not shown, the following slip-out prevention part is also preferable. This slip-out prevention part is a doughnut-shaped hollow rubber body, and is configured to include an air pressure member such that when air is not injected, the inside of the doughnut shape does not expand and the inner diameter of the doughnut shape does not abut against the outer circumferential surface of the upper pipe 140 of the drainage collecting pipe 100, but when air is injected, the inside of the doughnut shape expands and the inner diameter of the doughnut shape abuts against the outer circumferential surface of the upper pipe 140 of the drainage collecting pipe 100. Then, without injecting air into the hollow body, the inner diameter of the doughnut shape is larger than the outer circumferential surface of the upper pipe 140 of the drainage collecting pipe 100 (not inwardly bulging), and the slip-out prevention part is separated from the outer circumferential surface of the upper pipe 140 of the drainage collecting pipe 100, and after placing the slip-out prevention part on the outside of the upper pipe 140 of the drainage collecting pipe 100, air is injected so that the hollow body bulges inward and the inner diameter of the doughnut shape comes into contact with the outer circumferential surface of the upper pipe 140 of the drainage collecting pipe 100, and the fixing member is attached to the upper pipe 140 of the drainage collecting pipe 100. Note that, although not limited to this, an example of a pneumatic member having such a doughnut-shaped rubber hollow body shape is the external gripping type Air Gripper (R) by Prospira Co., Ltd.

[0052] In the protective covers up to this point, the fixing member holds the outside of the upper pipe 140 of the drainage collecting pipe 100, but the protective cover according to the present invention may hold the inside of the upper pipe 140 of the drainage collecting pipe 100 (not shown). In this way, the protective cover is attached to the upper pipe 140 of the drainage collecting pipe 100 by abutting against the inner peripheral surface of the upper pipe 140 of the drainage collecting pipe 100. For such a protective cover, it is preferable that the fixing member (not shown) has a slip-out prevention portion that can move toward and away from the upper pipe 140 of the drainage collecting pipe 100. It is preferable that the anti-slip portion is placed on the inside of the upper pipe 140 of the drainage collector pipe 100 while being separated from the inner surface of the upper pipe 140 of the drainage collector pipe 100, and then the anti-slip portion is brought close to the inner surface of the upper pipe 140 of the drainage collector pipe 100 so that the anti-slip portion abuts against the inside of the upper pipe 140 of the drainage collector pipe 100, and the fixing member is attached to the upper pipe 140 of the drainage collector pipe 100.

[0053] Furthermore, as a protective cover that holds the inside of the upper pipe 140 of such a drainage collecting pipe 100, the anti-slip portion (not shown) is a cylindrical hollow rubber body, and is configured to include an air pressure member such that when air is not injected, the cylinder does not expand outward and the outer diameter of the cylinder does not abut against the inner surface of the upper pipe 140 of the drainage collecting pipe 100, but when air is injected, the cylinder expands outward and the outer diameter of the cylinder abuts against the inner surface of the upper pipe 140 of the drainage collecting pipe 100. Then, without injecting air into the hollow body, the outer diameter of the cylinder is smaller than the inner circumferential surface of the upper pipe 140 of the drainage collecting pipe 100 (not inflated outward), and the fall-off prevention part is separated from the inner circumferential surface of the upper pipe 140 of the drainage collecting pipe 100. After that, air is injected so that the hollow body bulges outward and the outer diameter of the cylinder approaches the inner circumferential surface of the upper pipe 140 of the drainage collecting pipe 100 until the fixing member is attached to the upper pipe 140 of the drainage collecting pipe 100. Note that, although not limited to this, an example of a pneumatic member having such a cylindrical rubber hollow body shape is the internal gripping type Air Picker (R) by Prospira Co., Ltd.

[0054] As described above, the protective cover of this embodiment is a protective cover for a drainage collector pipe (not limited to being made of cast iron or resin) that is installed in a through hole in the floor slab of a building, and can reduce or avoid the possibility of the drainage collector pipe being hit and cracked or chipped when, for example, a pipe support of the shoring falls over. <First Modification> A protective cover 2000 according to a first modified example of this embodiment will be described below with reference to Fig. 12. This protective cover 2000 has a slip-out prevention part (generally a substantially circular band body 2010 shown in Fig. 12) that holds the outside (outer circumferential surface) of the upper pipe 140 of the drainage collecting pipe 100. This slip-out prevention part includes a substantially circular band body 2010 having a diameter equal to or larger than the outer diameter of the upper pipe 140 that covers the outer periphery of the upper pipe 140 of the drainage collecting pipe 100, a plurality of female thread members 2010N provided on the band body 2010, and a male thread member 2010B that is screwed into the female thread member 2010N and approaches the outer circumferential surface of the upper pipe 140 of the drainage collecting pipe 100 as the screwing with the female thread member 2010N progresses. The slip-out prevention part constitutes a part of the fixing member, and the fixing member including this slip-out prevention part is attached to the cover member 1020. Then, the male threaded member 2010B is retracted from the female threaded member 2010N to move the tip of the male thread 2010B away from the outer peripheral surface of the upper pipe 140 of the drainage collection pipe 100, and the anti-slip portion is placed on the outside of the upper pipe 140 of the drainage collection pipe 100.Then, the male threaded member 2010B is further threadedly engaged with the female threaded member 2010N until the tip of the male thread 2010B comes into contact with the outer peripheral surface of the upper pipe 140 of the drainage collection pipe 100 directly or indirectly (indirectly, for example, via the upper outer layer member 600), and the fixing member is attached to the upper pipe 140 of the drainage collection pipe 100. Unlike the band body 1010R1 and the band body 1010R2 connected by the hinge 1016 described above, the band body 2010 is preferably made of an elastically deformable metal in order to place the substantially circular band body 2010 on the outside of the upper pipe 140 of the drainage collecting pipe 100 by separating the bolt fastening portion 2012 and expanding the substantially circular shape. However, it may be a pair of semicircular band bodies connected by a hinge, or a combination of a pair of semicircular band bodies of an assembly type without a hinge (one in FIG. 9 that does not include the hinge 1016 and has, for example, engaging portions that engage with each other instead of the hinge 1016 and is assembled by engaging them with each other). As shown in FIG. 12, the bolt fastening portion 2012 has a notch with a notch direction on the top side (upper side), so that it is easy to perform a fastening operation using a bolt and a nut (both not shown). <Second Modification> A protective cover 3000 according to a second modified example of this embodiment will be described below with reference to FIG. 13. This protective cover 3000 includes a slip-out prevention portion 3010 (roughly an operating portion 3012 and an arm portion 3014 shown in FIG. 13) that holds the inside (inner peripheral surface) of the upper pipe 140 of the drainage collecting pipe 100. This slip-out prevention portion 3010 includes an operating portion 3012 provided above the cover member 1020, and an arm portion 3014 that is connected to the lower portion of the operating portion 3012 via a vertically long rod body 3013 and can be expanded and contracted in a substantially horizontal plane (as shown by the white arrow in FIG. 13(C)) by operating the operating portion 3012 (for example, by rotating the hexagonal head). This slip-out prevention portion 3010 constitutes a part of the fixing member, and the fixing member including the slip-out prevention portion 3010 is attached to the cover member 1020. Then, the arm portion 3014 is contracted so that the tip of the arm portion 3014 is separated from the inner surface of the upper pipe 140 of the drainage collection pipe 100, and the anti-slip portion 3010 is placed inside the upper pipe 140 of the drainage collection pipe 100.Then, the operating portion 3012 is operated to extend the arm portion 3014 (as shown by the white arrow in Figure 13 (C)) until the tip of the arm portion 3014 comes into contact with the inner surface of the upper pipe 140 of the drainage collection pipe 100, and the fixing member is attached to the upper pipe 140 of the drainage collection pipe 100. In addition, when the arm portion 3014 is extended and attached to the upper pipe 140 of the drainage collection pipe 100 by approaching it until the tip of the arm portion 3014 abuts the inner surface of the upper pipe 140 of the drainage collection pipe 100, it is also preferable to engage the tip of the arm portion 3014 with the drain portion 141 inside the upper pipe 140 so that the fixing member can be attached to the upper pipe 140 of the drainage collection pipe 100. <Third Modification> Hereinafter, a protective cover 4000 and a protective cover 4001 according to a third modified example of this embodiment will be described with reference to Fig. 14. Note that these protective covers 4000 and 4001 correspond to the protective cover 1000 shown in Fig. 9, and the same structures (members) of the protective cover 4000 and the protective cover 4001 as those of the protective cover 1000 are designated by the same reference numerals as those used in Fig. 9. For this reason, the structures designated by the same reference numerals will not be described repeatedly here.

[0055] As shown in Figures 10 and 11, when the protective cover 4000 shown in Figure 14(A) or the protective cover 4001 shown in Figure 14(B) is attached to the outer peripheral surface of the upper tube 140 by a fixing member 1010 (more specifically, a slip-out prevention portion (roughly a pair of semicircular band bodies 1010R1 and band bodies 1010R2 connected by hinges 1016 shown in Figure 14)), the opening side end face of the upper tube 140 (more specifically, the upper end face of the upper tube receiving member 144) faces the underside of the protective cover 4000 or protective cover 4001 (the underside of the circular plate 1014 if the circular plate 1014 is provided, and the underside of the cover member 1020 if the circular plate 1014 is not provided) (it is sufficient that they face each other, and they may face each other in abutting contact, or they may face each other with a gap). In this case, a cushioning material is provided on the underside of protective cover 4000 or protective cover 4001 (the underside of circular plate 1014 or cover member 1020) facing at least a portion of the opening side end face of upper tube 140 (it is sufficient that they face each other, and they may be abutting and facing each other, or they may be facing each other with a gap between them).

[0056] More specifically, examples of cushioning materials that abut against the opening end face of the upper pipe 140 (the upper end face of the upper pipe receiving member 144) include a plurality of square cushioning materials 4010 (preferably arranged symmetrically about a point centered on the axis of the drainage collecting pipe 100, and here four are arranged at 90 degree intervals, but three at 120 degree intervals, etc. may also be used) as in the cover member 4000 shown in Figure 14(A), which partially abuts against the opening end face of the upper pipe 140 (the upper end face of the upper pipe receiving member 144), and a circular (doughnut-shaped) (this does not exclude disc-shaped) cushioning material 4011 that abuts against the entire circumference of the opening end face of the upper pipe 140 (the upper end face of the upper pipe receiving member 144), as in the cover member 4001 shown in Figure 14(B). Both the cushioning materials 4010 and 4011 are preferable in that, even if the protective cover 4000 or the protective cover 4001 receives an impact, they can prevent direct contact between the drainage collecting pipe 100 and the mounting bracket 1010, and more reliably protect the drainage collecting pipe 100. Note that, as an example of the cushioning materials 4010 and 4011, a resin member for shock absorption can be used, and such a resin member for shock absorption includes rubber, elastomer, thermoplastic resin, thermosetting resin, and the like. <Fourth modified example> A protective cover 5000 and a protective cover 5001 according to a fourth modified example of the present embodiment will be described below with reference to Fig. 15 and Fig. 16. Fig. 15(A) and Fig. 16(A) are side views showing the state in which the protective cover according to this modified example is attached to the drainage collecting pipe 100 (the drainage collecting pipe is shown by a hidden line (dotted line)), Fig. 15(B) and Fig. 16(B) are side cross-sectional views showing the state in which the protective cover according to this modified example is attached to the drainage collecting pipe 100 (the drainage collecting pipe is shown by a solid line), and Fig. 15(C) and Fig. 16(C) are perspective views showing the state in which the protective cover according to this modified example is attached to the drainage collecting pipe 100 (the drainage collecting pipe is shown by a hidden line (dotted line)). 15 and 16 includes differences in details from the drainage collecting pipe 100 shown in the other figures (for example, the provision of an eccentric socket between the side branch pipe connection portion 142 and the side branch pipe receiving member 146), but the reference numerals given to the drainage collecting pipe have not been changed because they can be considered to be the same as the drainage collecting pipe to which the protective cover of the present invention is attached. Also, the cover member 1020 has the same structure as described above, and further, when the protective cover of the present invention is attached to the drainage collecting pipe 100 shown in Figures 15 and 16, the outer circumferential edge of the cover member 1020, including the eccentric socket described above, is located outward from the position of the side branch pipe receiving member 146. When the tip position of the side branch pipe receiving member 146 is located further outward (outside), such as when there is an eccentric socket or when the nominal diameter of the side branch pipe receiving port is large (the larger the nominal diameter of the side branch pipe receiving port, the further outward the tip position of the side branch pipe receiving member 146 tends to be located), it is preferable to increase the outer diameter of the cover member 1020 accordingly or to increase the thickness of the cover member 1020. More specifically, as one example, when the nominal diameter of the side branch pipe receiving port is 75 or less, the thickness of the cover member 1020 is 3 mm and the outer diameter is φ350 mm, and when the nominal diameter of the side branch pipe receiving port is 100, the thickness of the cover member 1020 is 5 mm and the outer diameter is φ450 mm.

[0057] First, the difference between the protective cover according to this modification and the protective cover according to the modification other than the above (including the embodiment and the modification) will be described. The above-mentioned protective cover is attached to the upper pipe 140 by a fixing member that holds the outside or inside of the upper pipe 140 of the drainage collecting pipe 100 (prevents it from coming off from the upper pipe 140), whereas the fixing member of the protective cover 5000 and the protective cover 5001 according to this modification is cylindrical in shape (including rod-shaped (including a collection of multiple rods arranged on a circumference or an arc), columnar, prismatic, pyramidal, cylindrical, conical, etc.), and the cylindrical fixing member is placed on the outer periphery of the upper pipe 140 (more specifically, the upper pipe receiving member 144) or the cylindrical fixing member is inserted into the inner periphery of the upper pipe 140 (more specifically, the upper pipe receiving member 144), and does not have a function of actively holding like the slip-out prevention part of the fixing member other than the modification. That is, the protective cover 1000 shown in Figures 7 to 10 and the protective cover 2000 of the first modified example shown in Figure 12 correspond to the external holding type, and the protective cover 3000 of the second modified example shown in Figure 13 corresponds to the internal holding type, but the protective cover 5000 and protective cover 5001 of this modified example are not of this type (held by a special mechanism).

[0058] Although the protective cover 5000 and protective cover 5001 in this modified example are not of such a retaining type, the cylindrical fixing members (more specifically, fixing members 5010 and 5011) provided on these protective covers 5000 and 5001 function as removable fixing members for the upper tube 140 (since the upper tube 140 includes the upper tube receiving member 144, the upper tube 140 here is more specifically the upper tube receiving member 144).

[0059] With reference to Fig. 15, a protective cover 5000 will be described in which a fixing member 5010 having a simple hollow cylindrical shape is placed on the outer periphery of the upper pipe 140 (more specifically, the upper pipe receiving member 144). As shown in Fig. 15, the protective cover 5000 includes a fixing member 5010 that is detachable from the upper pipe 140 (more specifically, the upper pipe receiving member 144), and a cover member 1020 that is connected above the fixing member 5010 (the mechanism for connecting is not limited), and when the cover member 1020 is attached to the upper pipe 140 by the fixing member 5010, the outer periphery of the cover member 1020 is located outward from the position of the horizontal branch pipe receiving member 146. As described above, by placing the cylindrical fixing member 5010 on the outer periphery of the upper pipe 140 (more specifically, the upper pipe receiving member 144), the fixing member 5010 realizes a function of being detachable from the upper pipe 140 (more specifically, the upper pipe receiving member 144). Here, it is also preferable to form a vertical slit in the fixing member 5010 to make it expandable and contractible, and to fix the fixing member 5010 in place by abutting it against the vertical pipe socket from the outside with a tightening band or the like.

[0060] The shape of this fixing member 5010 is a hollow cylinder as described above, but its inner diameter is at least larger than the maximum outer diameter of the upper pipe receiving member 144 (if it is too large, it will lack stability, and if the inner diameter is set to be slightly larger than the maximum outer diameter and abuts against the maximum outer diameter, stability will be improved). The length of the drainage collecting pipe in the pipe axis direction is not particularly limited, but it is preferable that it is about the length that abuts against the outer upper surface of the water collection chamber (the outer peripheral upper surface of the horizontal branch pipe connecting portion 142) (abutting improves stability). In this case, it is also preferable to add a cushioning material to the abutting portion. It is also preferable to insert a cushioning material 4010 (shown in FIG. 14(A)) between the cover member 1020 and the upper pipe receiving member 144 without abutting against the outer upper surface of the water collection chamber (the outer peripheral upper surface of the horizontal branch pipe connecting portion 142).

[0061] Next, referring to Fig. 16, a protective cover 5001 in which a fixing member 5011 having a cylindrical shape (it may be solid, but is assumed to be hollow here) is inserted into the inner circumference of the upper pipe 140 (more specifically, the upper pipe receiving member 144). As shown in Fig. 16, this protective cover 5001 includes a fixing member 5011 that is detachable from the upper pipe 140 (more specifically, the upper pipe receiving member 144), and a cover member 1020 connected above the fixing member 5011 (the mechanism for connecting is not limited), and the outer peripheral edge of the cover member 1020 is positioned outward from the position of the side branch pipe receiving member 146 when the cover member 1020 is attached to the upper pipe 140 by the fixing member 5011. As described above, the cylindrical fixing member 5011 is inserted into the inner circumference of the upper pipe 140 (more specifically, the upper pipe receiving member 144), thereby realizing the function of the fixing member 5011 being removable from the upper pipe 140 (more specifically, the upper pipe receiving member 144). Here, it is also preferable to provide a vertical slit in the fixing member 5011 to give it an expandable / contractable structure, add a diameter expanding member to the inside of the fixing member 5011, and fix a part of the fixing member 5011 by abutting it against the vertical pipe receiving port.

[0062] As described above, the shape of this fixing member 5011 is hollow and tubular, but its outer diameter is at least smaller than the minimum inner diameter of the upper pipe receiving member 144 (if it is too small, it will lack stability; if the outer diameter is set to be slightly smaller than the minimum inner diameter and abutted against the minimum inner diameter, stability is improved; in particular, abutting the outer diameter against a rubber ring 144G (shown in Figure 5) will further improve stability). The length of the drainage collecting pipe in the axial direction is not particularly limited, but a length that extends to approximately above the position where various structures (deflection plate, backflow prevention section, etc.) are located on the inner surface of the upper pipe 140 is preferable, and a length that abuts against a step (for example, a positioning step for determining the insertion length of the upper pipe receiving member 144 into the upper pipe connection section 143) that the upper pipe receiving member 144 has on its inner circumference is particularly preferable (abutment improves stability; if it is too short, it may lack stability, but abutting the outer diameter against a rubber ring 144G will improve stability). In this case, it is also preferable to add a cushioning material to the contact portion. It is also preferable to insert a cushioning material 4010 (shown in FIG. 14(A)) between the cover member 1020 and the upper pipe receiving member 144 without contacting the step.

[0063] Similar to the above-described embodiment, the protective covers relating to these modified examples are protective covers for drainage collector pipes (not limited to being made of cast iron or plastic) installed in through holes in the floor slab of a building, and can reduce or avoid the possibility of the drainage collector pipe being hit and cracked or chipped when, for example, a pipe support of the shoring falls over.

[0064] In the above description, the fixing member of the protective cover is a member that is removable from upper pipe 140, more specifically, a member that is removable from upper pipe receiving member 144, but the protective cover of the present invention is not limited to one that has a fixing member that is removable from such upper pipe receiving member 144. For example, the fixing member may be one that fixes (removably fixes) the branch pipe receiving port or main body portion (body portion, water collection chamber) of upper pipe 140. More specifically, one example is to wrap a wire or band around the branch pipe receiving port or main body portion (body portion, water collection chamber) and connect it to the main body of the protective cover.

[0065] It should be noted that the embodiments disclosed herein are illustrative and not restrictive in all respects. The scope of the present invention is defined by the claims, not the above description, and is intended to include all modifications within the meaning and scope of the claims. [Industrial Applicability]

[0066] The present invention is preferred for a resinous drainage collecting pipe installed in a through hole of a floor slab of a building, the drainage collecting pipe including an upper pipe protruding above the floor slab, a lower pipe bonded to the lower part of the upper pipe, and an outer layer member consisting of at least two layers provided on the outer periphery of the drainage collecting pipe from the lower part of the branch to the lower pipe, and is particularly preferred for a drainage collecting pipe provided with an outer layer member having water-stopping properties that satisfy specific conditions. Furthermore, the water-stopping inspection method according to the present invention is particularly preferred in that it can quickly, easily, and reliably confirm (inspect) the water-stopping properties of the outer layer member consisting of at least two layers provided on the outer periphery of the drainage collecting pipe from the lower part of the branch to the lower pipe. [Explanation of symbols]

[0067] 100 Drainage collection pipe 110 Lower pipe 114 Swirling blade 116 Thermally expandable fireproofing materials 130 Lower pipe connection 140 Upper pipe 142 Horizontal branch pipe connection 143 Upper pipe connection 144 Upper pipe receiving part 146 Horizontal branch pipe receiving member 600 Upper outer layer member 700 Outer layer material 710 Innermost layer 712 Thermally expandable fireproofing material 714 Damping material 720 (Intermediate layer) Vibration insulator 730 (Outermost) Soundproof Cover 1000 Protective Cover 1010 Fixing member 1020 Cover member 2000 (First Modification) Protective Cover 3000 (Second Modification) Protective Cover 4000, 4001 (related to the third modification) Protective cover 5000, 5001 (Fourth Modification) Protective cover

Claims

1. A protective cover for a drainage collection pipe installed in a through hole of a floor slab of a building, The drainage collecting pipe includes an upper pipe protruding above the floor slab and a lower pipe located below the upper pipe, The upper pipe includes an upper pipe connection portion that connects an upper pipe through which drainage water flows in from an upper floor, an upper pipe receiving member provided on the upper pipe connection portion, and at least one horizontal branch pipe connection portion that connects a horizontal branch pipe above the floor slab, and a horizontal branch pipe receiving member provided on the horizontal branch pipe connection portion; The protective cover is a removable fixing member for the upper tube; A protective cover characterized by including a cover member connected above the fixing member, wherein when attached to the upper pipe by the fixing member, the outer peripheral edge of the cover member is positioned outwardly from the position of the lateral branch pipe receiving member.

2. The protective cover according to claim 1 , wherein the cover member is made of resin.

3. 2. The protective cover of claim 1, wherein the cover member is made of polycarbonate.

4. 2. The protective cover according to claim 1, wherein the fixing member is attached to the upper tube so as to hold the outside of the upper tube.

5. the fixing member includes a slip-out prevention portion that is movable toward and away from an outer circumferential surface of the upper tube, The protective cover described in claim 4, characterized in that the anti-slip portion is placed on the outside of the upper tube while being spaced from the outer circumferential surface, and then the anti-slip portion is brought closer to the outer circumferential surface so that the anti-slip portion directly or indirectly abuts against the outside of the upper tube, thereby attaching the fixing member to the upper tube.

6. The slip-out prevention portion is a pair of substantially semicircular portions covering the outer periphery of the upper tube, the ends of the pair of band bodies are connected to each other by a hinge, and a fastening hole is provided at the end opposite to the ends connected by the hinge, through which a screw member such as a bolt and a nut is inserted, the ends of the band body at the opposite ends are spaced apart from each other and the fall-off prevention portion is placed on the outside of the upper tube in a state where the fall-off prevention portion is spaced from the outer circumferential surface, and then the ends of the opposite ends are fastened together with the screw member so that the band body comes close to the outer circumferential surface of the upper tube and the fixing member is attached to the upper tube; 6. The protective cover according to claim 5, wherein a substantially semicircular upper end surface of one of the band bodies is fixed to the cover member.

7. The slip-out prevention portion is a pair of substantially semicircular portions covering the outer periphery of the upper tube, the ends of the pair of band bodies are connected to each other by a hinge, and a fastening hole is provided at the end opposite to the ends connected by the hinge, through which a screw member such as a bolt and a nut is inserted, the ends of the band body at the opposite ends are spaced apart from each other and the fall-off prevention portion is placed on the outside of the upper tube in a state where the fall-off prevention portion is spaced from the outer circumferential surface, and then the ends of the opposite ends are fastened together with the screw member so that the band body comes close to the outer circumferential surface of the upper tube and the fixing member is attached to the upper tube; The substantially semicircular upper end surface of one of the band bodies is fixed to a circular plate having a diameter smaller than the outer diameter of the cover member, 6. The protective cover according to claim 5, wherein the cover member, which is separate from the circular plate, is removably attached to the circular plate.

8. 8. The protective cover according to claim 7, wherein the circular plate is made of metal, and the cover member is made of resin.

9. 8. The protective cover according to claim 7, wherein the circular plate and the cover member are attached via a resin member for absorbing shock.

10. The protective cover according to any one of claims 6 to 9, wherein a resin member for absorbing shock is provided on the inner peripheral side of the band body.

11. When the upper tube is attached to the upper tube by the fixing member, an opening end surface of the upper tube faces a lower surface of the protective cover, The protective cover according to any one of claims 1 to 9, wherein a cushioning material is provided on the lower surface so as to face at least a portion of the opening side end surface.

Images