Fixing method, fixing member and drain

Abstract

To provide a fixing method, a fixing member, and a drain for fixing a fixed member such as a strainer to a waterproof layer in a state having durability against a certain load.SOLUTION: In a fixing method for fixing a fixed member 3 to a waterproof layer 2 by a fixing member 4, the waterproof layer 2 consists of polyvinyl chloride, the fixing member 4 is bonded to the waterproof layer 2 by a plate-shaped member 5 consisting of polyvinyl chloride, and the fixing member 4 comprises: a surface contact portion 41 that makes surface contact with the plate-shaped member 5; and an engagement portion 42 where the fixed member 3 is engaged. The fixing method comprises: a surface contact step for bringing the surface contact portion 41 into surface contact with the plate-shaped member 5; a bonding step for bonding the plate-shaped member 5 to a surface of the waterproof layer 2; and an engagement step for engaging the fixed member 3 with the engagement portion 42.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a fixing method for fixing a fixed member to a waterproof layer formed on a waterproof foundation using a fixing member, and to a fixing member and a drain used in the fixing method. [Background technology]

[0002] Waterproofing layers are formed on the roofs of buildings to prevent leaks, etc. This waterproofing layer includes drains installed in drainage pipes that drain rainwater, melted snow, etc. Strainers are fixed to the drains to prevent foreign objects such as garbage from entering the drain.

[0003] Patent Document 1 discloses a drain body including a flat plate portion formed from a thin metal plate and a metal circular pipe (tubular portion) connected to a circular opening located in the center of the flat plate portion.

[0004] The drain body is provided with a metal beam spanning the circular opening to prevent the strainer from coming loose and scattering when exposed to strong winds, etc. Both ends of the beam are fixed to the metal drain body by brazing, welding, etc. The strainer is secured to the beam.

[0005] Furthermore, Patent Document 2 discloses a waterproof sheet made of soft vinyl chloride as a waterproof layer, and a repair drain member made of soft vinyl chloride. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Publication No. 2022-124585 [Patent Document 2] Japanese Patent Application Publication No. 2023-72942 Summary of the Invention [Problem to be solved by the invention]

[0007] When fixing the metal beam described in Patent Document 1 to the soft vinyl chloride repair drain member described in Patent Document 2, it is difficult to fix the beam to the repair drain member in a state that has the strength to withstand external forces such as wind. Fixing the beam to the repair drain member and the drain pipe with anchors or the like is not preferable because it will create holes in the waterproof layer.

[0008] An object of the present invention is to provide a fixing method, fixing member, and drain that can fix a fixed member to a waterproof layer in a state in which the member has the strength to withstand external forces. [Means for solving the problem]

[0009] A characteristic configuration of a fixing method for achieving the above-mentioned object is a fixing method in which a fixed member is fixed to a waterproof layer formed on a waterproof base using a fixing member, wherein the waterproof layer is made of polyvinyl chloride, the fixing member is joined to the waterproof layer by a plate-shaped member made of polyvinyl chloride, the fixing member has a surface contact portion that comes into surface contact with the plate-shaped member and an engagement portion with which the fixed member engages, and is characterized by including a surface contact process of bringing the surface contact portion into surface contact with the plate-shaped member, a joining process of joining the plate-shaped member to the surface of the waterproof layer, and an engagement process of engaging the fixed member with the engagement portion.

[0010] According to the present invention, the fixing member is joined to the waterproof layer by the plate-shaped member with the surface contact portion in surface contact with the plate-shaped member. This increases the contact area between the fixing member and the plate-shaped member, making it easier to fix the fixing member to the plate-shaped member. Furthermore, the fixed member is engaged with the engagement portion of the fixing member. This allows the fixed member to be fixed to the waterproof layer in a state where it has the strength to withstand external forces.

[0011] In the present invention, it is preferable that the waterproof base comprises a drain pipe, the waterproof layer includes a surface layer of a tubular drain inserted into the drain pipe, the fixed member is a strainer that covers the drain to allow water to pass through, and the joining process is a process of joining the plate-shaped member to the surface layer.

[0012] The strainer is a component exposed on the surface of the waterproof layer, and is therefore susceptible to the effects of strong winds and the like. According to this configuration, the fixing member is joined to the surface layer of the drain by the plate-shaped member with the surface contact portion in surface contact with the plate-shaped member. This increases the contact area between the fixing member and the plate-shaped member, making it easier for the fixing member to be fixed to the plate-shaped member. In addition, the strainer is engaged with the engagement portion of the fixing member. This allows the strainer to be fixed to the surface layer of the drain in a state where it has the strength to withstand external forces.

[0013] Furthermore, the strainer is joined to the surface layer of the drain that is not exposed on the surface of the waterproof layer, which is aesthetically pleasing since the fixed portion between the strainer and the drain is not exposed on the surface of the waterproof layer.

[0014] In the present invention, it is preferable that in the joining step, the surface contact portion is positioned between the waterproof layer and the plate-like member by joining the plate-like member to the surface of the waterproof layer.

[0015] According to this configuration, in the joining step, the surface-to-surface contact portion is located between the waterproof layer and the plate-like member, thereby sandwiching the surface-to-surface contact portion between the waterproof layer and the plate-like member, thereby strengthening the joining between the fixing member and the waterproof layer.

[0016] The present invention is preferably a fixing member used in the above-described fixing method.

[0017] According to this configuration, the fixing member is joined to the waterproof layer by the plate-shaped member with the surface-contact portion in surface contact with the plate-shaped member. This increases the contact area between the fixing member and the plate-shaped member, making it easier to fix the fixing member to the plate-shaped member. Furthermore, the fixed member is engaged with the engagement portion of the fixing member. This allows the fixed member to be fixed to the waterproof layer in a state where it has the strength to withstand external forces.

[0018] In the present invention, it is preferable that the engaging portion has a shape that allows a stay provided on the fixed member to engage with the engaging portion.

[0019] According to this configuration, the stay extending from the fixed member is engaged with the fixing member, whereby the stay of the fixed member is fixed to the engagement portion of the fixing member at a position separated from the fixed member.

[0020] In the present invention, the engagement portion is a bolt extending in a direction intersecting the contact surface with the plate-like member at the surface contact portion, and the surface contact portion has an opening portion through which the engagement portion can pass, and it is preferable that the diameter of the opening portion is larger than the diameter of the engagement portion.

[0021] In the engagement process, it may be difficult to align the engagement portion with the fixed member when the fixing member is fixed to the waterproof layer. According to this configuration, the diameter of the opening portion is larger than the diameter of the engagement portion. This makes it possible to move the engagement portion in the radial direction of the opening portion during the engagement process. Therefore, it is easy to align the engagement portion with the fixed member when the fixing member is fixed to the waterproof layer.

[0022] In the present invention, it is preferable that the surface contact portion is a member having a C-shape in vertical cross section.

[0023] According to this configuration, the surface-to-surface contact portion is held by the plate-like member by passing the plate-like member through the inside of the C-shaped surface-to-surface contact portion. Therefore, the surface-to-surface contact portion can be fixed to the plate-like member without using bolts or the like.

[0024] In the present invention, the engagement portion is a bolt provided on a first portion on the front side of the surface contact portion and extending in a direction intersecting the contact surface of the surface contact portion with the plate-like member, and it is preferable that there is a gap between a second portion on the rear side of the surface contact portion and the engagement portion.

[0025] In the engagement process, it may be difficult to align the engagement portion with the fixed member when the fixing member is fixed to the waterproof layer. According to this configuration, there is a gap between the second portion at the rear of the surface-to-surface contact portion and the engagement portion. This makes it possible to move the engagement portion in a direction intersecting the contact surface between the surface-to-surface contact portion and the plate-like member in the engagement process. Therefore, it is easy to align the engagement portion with the fixed member when the fixing member is fixed to the waterproof layer.

[0026] The drain to achieve the above objective has a characteristic configuration in which it is a cylindrical drain whose surface layer is made of polyvinyl chloride and which is inserted into a drainage pipe, and which comprises a plate-like member made of polyvinyl chloride and joined to the surface layer, and a fixing member to which a strainer that covers the drain to allow water to pass through is engaged, and the fixing member has a surface contact portion that makes surface contact with the plate-like member and an engagement portion to which the strainer is engaged.

[0027] According to the present invention, the fixing member with which the strainer is engaged is joined to the waterproof layer by a plate-like member made of vinyl chloride, thereby enabling the strainer to be fixed to the drain by the fixing member in a state in which it has the strength to withstand external forces. [Brief explanation of the drawings]

[0028] [Figure 1] FIG. 4 is a vertical cross-sectional view showing a state in which the strainer is fixed to the drain by a fixing member. [Figure 2] FIG. 10 is a front view showing the fixing member in the surface contact step. [Figure 3] FIG. 3 is a vertical cross-sectional view taken along the line III-III in FIG. 2. [Figure 4]4 is a cross-sectional view taken along the line IV-IV in FIG. 1, showing the fixing member in a surface contact step. [Figure 5] FIG. 10 is a vertical cross-sectional view showing the fixing member in an engaging step. [Figure 6] 10 is a flowchart showing a method for fixing a fixed member to a waterproof layer using a fixing member. [Figure 7] FIG. 10 is a vertical cross-sectional view showing another example of a fixing member. [Figure 8] FIG. 10 is a vertical cross-sectional view showing another example of a fixing member. [Figure 9] FIG. 10 is a vertical cross-sectional view showing another example of a fixing member. [Figure 10] FIG. 10 is a vertical cross-sectional view showing another example of a fixing member. [Figure 11] FIG. 10 is a perspective view showing another example of a strainer. [Figure 12] FIG. 10 is a vertical cross-sectional view showing another example of a fixing member. [Figure 13] FIG. 10 is a vertical cross-sectional view showing another example of a fixing member. DETAILED DESCRIPTION OF THE INVENTION

[0029] The fixing method, fixing member, and drain according to the present invention will be described below with reference to the drawings. In the following description, the direction of arrow F in the drawings will be referred to as the "front side," the direction of arrow B as the "rear side," the direction of arrow U as the "upper side," the direction of arrow D as the "lower side," the direction of arrow R as the "right side," and the direction of arrow L as the "left side."

[0030] An example of the fixing method according to the present invention is used in repair work of a waterproofing layer, which is carried out at regular intervals in order to maintain the waterproofing function of the waterproofing layer.

[0031] The waterproof layer 2 is made of vinyl chloride. In this embodiment, the waterproof layer 2 is formed by laying a waterproof sheet 22 made of vinyl chloride on the waterproof substrate 1.

[0032] The waterproofing substrate 1 includes the building's skeleton. In this embodiment, the waterproofing substrate 1 includes a concrete skeleton. However, the skeleton may also be composed of a corrugated metal roof with repeated peaks and valleys in a vertical cross section, and a heat insulating material laid on top of the metal roof. The waterproofing substrate 1 may also have other forms. For example, the waterproofing substrate 1 may include a skeleton made of wood or a combination of metal and concrete. The waterproofing substrate 1 may be a vertical surface such as a vertical wall or an inclined surface, in addition to a horizontal surface.

[0033] 1, the waterproof substrate 1 is provided with a drainage pipe 1a for draining rainwater, melted snow, etc. The drainage pipe 1a extends in the vertical direction from the horizontal surface of the waterproof substrate 1.

[0034] Here, one method of renovation work for roof waterproofing, etc., is the total replacement method, in which the existing waterproof layer 7 is removed and a new waterproof layer 2 is formed. In addition, a cheaper method compared to the total replacement method is the overlay method, in which the existing waterproof layer 7 is left in place and a new waterproof layer 2 is formed on top of it. With the overlay method, the waterproof function can be further improved by forming a new waterproof layer 2 on top of the existing waterproof layer 7. The example in Figure 1 is based on the overlay method, and the existing waterproof layer 7 is included in the waterproof base 1.

[0035] As shown in FIG. 1, the waterproof sheet 22 is laid on top of the existing waterproof layer 7. The waterproof sheet 22 is a sheet-like member made of vinyl chloride (hard vinyl chloride resin or soft vinyl chloride resin). Vinyl chloride is a material that accounts for 50% or more by weight of the waterproof sheet 22. In addition to vinyl chloride, the waterproof sheet 22 also contains plasticizers and the like.

[0036] The existing waterproof layer 7 is formed by, for example, asphalt waterproofing, sheet waterproofing, coating waterproofing, or the like.

[0037] In this embodiment, the waterproof layer 2 includes a surface layer of a cylindrical drain 21 that is inserted into the drain pipe 1a. The drain 21 is made of vinyl chloride (hard vinyl chloride resin or soft vinyl chloride resin). However, the drain 21 may also be made of a metal (for example, iron, stainless steel, aluminum, copper, lead, etc.) whose surface is coated with vinyl chloride. In other words, at least the surface layer of the drain 21 is made of vinyl chloride.

[0038] As shown in FIG. 1, the drain 21 includes a cylindrical portion 21a and a plate-like flange portion 21b extending from a longitudinal end of the cylindrical portion 21a to the outside in the radial direction of the cylindrical portion 21a.

[0039] A strainer 3 (an example of a fixed member) that covers the drain 21 so as to allow water to pass through is engaged with the drain 21. The strainer 3 is made of metal (for example, iron, stainless steel, aluminum, copper, lead, etc.).

[0040] The strainer 3 prevents debris such as fallen leaves from flowing into the drain 21. Although not shown, the strainer 3 has an apex portion, a center pillar portion extending vertically from the center of the apex portion, and multiple outer pillar portions extending vertically from the outer periphery of the apex portion. The multiple outer pillar portions are lined up in the circumferential direction at predetermined intervals.

[0041] 1, the strainer 3 includes a plate-shaped stay 3a made of a metal (for example, iron, stainless steel, aluminum, copper, lead, etc.). In other words, the stay 3a is made of the same material as the strainer 3.

[0042] The stay 3a is a U-shaped member and is positioned with its opening facing downward. The stay 3a is connected to the lower end of the center pillar portion of the strainer 3. Holes are formed at both ends of the stay 3a. The strainer 3 is fixed to the fixing member 4 by the stay 3a.

[0043] Here, during renovation work, when a metal stay 3a, which is made of a different material from the surface layer of the drain 21, is fixed to the drain 21, whose surface layer is made of polyvinyl chloride, a fixing member 4 is used to give the strainer 3 the strength to withstand external forces.

[0044] [Fixing member] As shown in Figures 1, 2, and 3, the fixing member 4 is a member that fixes the strainer 3 to the waterproof layer 2. The fixing member 4 is made of metal (e.g., iron, stainless steel, aluminum, copper, lead, etc.). The fixing member 4 is joined to the waterproof layer 2 by a strip-shaped plate member 5. In this embodiment, two fixing members 4 are joined to the inner surface of the drain 21 facing each other. The fixing members 4 may be joined to the drain 21 manually, or may be joined to the drain 21 by a machine or the like.

[0045] The plate-shaped member 5 is made of vinyl chloride (hard vinyl chloride resin or soft vinyl chloride resin). In other words, the plate-shaped member 5 is made of the same material as the waterproof sheet 22 and the surface layer of the drain 21. On the other hand, as described above, the fixing member 4 and the strainer 3 are made of metal. In other words, the fixing member 4 is made of a different material from the waterproof sheet 22 and the drain 21.

[0046] The fixing member 4 has a surface contact portion 41 that comes into surface contact with the plate-like member 5, and an engagement portion 42 with which the strainer 3 is engaged.

[0047] [Surface contact area] As shown in Figures 2 and 3, the surface contact portion 41 has a C-shape in vertical cross section. The surface contact portion 41 includes a plurality of first portions 41a located on the front side (front side) of the surface contact portion 41, a second portion 41b located on the rear side (rear side) of the surface contact portion 41, a plurality of third portions 41c connecting the first portions 41a and the second portions 41b, and an opening portion 41d formed in the first portion 41a. The plurality of first portions 41a are located at positions spaced apart from each other in the vertical direction. The plate-shaped first portions 41a, the plate-shaped second portion 41b, and the plate-shaped third portion 41c are integrally formed.

[0048] The upper third portion 41c of the plurality of third portions 41c connects the upper end of the upper first portion 41a of the plurality of first portions 41a to the upper end of the second portion 41b. The lower third portion 41c of the plurality of third portions 41c connects the lower end of the lower first portion 41a of the plurality of first portions 41a to the lower end of the second portion 41b. In this embodiment, the opening portion 41d is formed in the upper first portion 41a.

[0049] [Engagement part] 2 and 3, the engagement portion 42 is a bolt extending in a direction intersecting the contact surface S of the surface contact portion 41 with the plate-like member 5. The engagement portion 42 passes through an opening portion 41d in the surface contact portion 41. A diameter D2 of the opening portion 41d is larger than a diameter D1 of the engagement portion 42. In addition, a gap D3 exists between the second portion 41b and the engagement portion 42.

[0050] [Method of fixing the strainer to the waterproof layer] Next, a method for fixing the strainer 3 to the drain 21 using the fixing member 4 in the repair work of the waterproof layer 2 will be described based on the flowcharts shown in Figures 1, 2, 4, 5 and 6. Note that the order of the steps described below may be reversed, and multiple steps may be performed simultaneously, as long as no contradictions arise.

[0051] In the following description, it is assumed that the existing drain and the existing strainer are removed from the waterproof layer 2.

[0052] [1-1] Surface contact process As shown in FIG. 2, the surface contact portion 41 is brought into surface contact with the plate-shaped member 5 (step S01 in FIG. 6, the same applies below). Specifically, the plate-shaped member 5 is inserted into the space inside the surface contact portion 41 surrounded by the first portion 41a, the upper and lower second portions 41b, and the upper and lower third portions 41c. The vertical dimension of the plate-shaped member 5 is smaller than the distance from the upper third portion 41c to the lower third portion 41c. In addition, the vertical dimension of the plate-shaped member 5 is larger than the distance from the upper first portion 41a to the lower first portion 41a.

[0053] As a result, second portion 41b of surface contact portion 41 is in surface contact with plate-shaped member 5. This makes it possible to fix surface contact portion 41 to plate-shaped member 5 without using a fastener such as a bolt.

[0054] [1-2]Joining process As shown in FIG. 4, with the plate-shaped member 5 inserted inside the surface contact portion 41, the plate-shaped member 5 is bonded to the surface of the drain 21 (step S02). Specifically, the plate-shaped member 5 is heated while being in contact with the inner surface of the cylindrical portion 21a. As a result, the plate-shaped member 5 itself is melted, and the plate-shaped member 5 is bonded to the inner surface of the cylindrical portion 21a (the surface layer of the drain 21). However, the plate-shaped member 5 may be heated to melt the adhesive layer of the plate-shaped member 5, and bond the plate-shaped member 5 to the cylindrical portion 21a. Alternatively, the plate-shaped member 5 may be bonded to the cylindrical portion 21a with an adhesive.

[0055] In the joining step, the plate-like member 5 is joined to the surface of the cylindrical portion 21a of the drain 21, so that the surface contact portion 41 is located between the cylindrical portion 21a and the plate-like member 5.

[0056] [1-3] The process of inserting the drain into the drain pipe As shown in FIG. 1, an existing waterproof layer 7 and a drain base 6 with a hole in the center remain around the drain pipe 1a. The drain 21 is inserted into the drain pipe 1a (step S03). Specifically, the cylindrical portion 21a of the drain 21 is inserted into the drain pipe 1a. The flange-shaped portion 21b of the drain 21 is placed on top of the existing waterproof layer 7. The diameter of the cylindrical portion 21a is smaller than the diameter of the drain pipe 1a.

[0057] [1-4]Engagement process As shown in FIG. 5, the strainer 3 is engaged with the engagement portion 42 (step S04). Specifically, the stay 3a is artificially deformed in a direction in which both ends of the stay 3a approach each other. Next, the engagement portion 42 is inserted into the holes at both ends of the stay 3a. Alternatively, the stay 3a may be artificially deformed in a direction in which both ends of the stay 3a approach each other after the engagement portion 42 is inserted into the hole at one of both ends of the stay 3a. In this state, the engagement portion 42 is inserted into the hole at the other end of both ends of the stay 3a. In this way, the stay 3a is engaged with the engagement portion 42. Next, the strainer 3 is fixed to the upper end of the stay 3a.

[0058] [1-5] The process of laying the waterproof sheet As shown in Fig. 1, the waterproof sheet 22 is laid on the surface of the existing waterproof layer 7 (step S05). The end 22a of the waterproof sheet 22 is overlapped with the flange-shaped portion 21b of the drain 21. However, the waterproof sheet 22 may be laid on the existing waterproof layer 7, and then the drain 21 may be inserted into the drainage pipe 1a. In this case, the flange-shaped portion 21b of the drain 21 is overlapped on the end 22a of the waterproof sheet 22.

[0059] Next, the sealing material 8 is filled between the end 22a and the flange-shaped portion 21b of the waterproof sheet 22. The strainer 3 is fixed to the drain 21 by the above steps.

[0060] Since the fixing member 4 is made of a material different from the surface layer of the drain 21, when fixing the fixing member 4 to the drain 21 without using fasteners such as bolts, it is difficult to ensure the strength of the connecting portion between the fixing member 4 and the drain 21.

[0061] In this embodiment, the fixing member 4 is fixed to the drain 21 via a plate-like member 5 made of the same material as the surface layer of the drain 21. This makes it easier for the plate-like member 5 to be joined to the waterproof sheet 22 or the drain 21. It also makes it possible to provide the strainer 3 with the strength to withstand external forces.

[0062] [Another embodiment] The present invention is not limited to the above-described embodiment. For example, the following other embodiments may be used. In the other embodiments described below, the same components as those in the above-described embodiment are assigned the same numbers and symbols.

[0063] [1] In the above-described embodiment, the surface contact portion 41 has a C-shape in vertical cross section. However, as shown in FIG. 7 , the surface contact portion 41 may be plate-shaped. In this case, the engagement portion 42 passes through a hole formed in the surface contact portion 41 and an opening portion 41d of the plate-shaped member 5. The plate-shaped member 5 is held by the engagement portion 42 and a nut 9 attached to the engagement portion 42. With the above configuration, the front surface of the surface contact portion 41 and the back surface of the plate-shaped member 5 are in surface contact. Then, the back surface (rear surface, the surface on the left in the figure) of the plate-shaped member 5 is joined to the surface of the waterproof layer 2, thereby joining the fixing member 4 to the waterproof layer 2.

[0064] 8, the surface contact portion 41 may be housed inside the plate-shaped member 5. With this configuration, the surface contact portion 41 comes into surface contact with the inner surface of the plate-shaped member 5. Then, the rear surface (rear surface, the surface on the left side in the figure) of the plate-shaped member 5 is joined to the surface of the waterproof layer 2, thereby joining the fixing member 4 to the waterproof layer 2.

[0065] [2] As shown in FIG. 9, the surface contact portion 41 may be U-shaped. In other words, the surface contact portion 41 does not have to include an upper first portion 41a and an upper third portion 41c. The surface contact portion 41 includes one first portion 41a and one third portion 41c. In this embodiment, the upper portion of the first portion 41a is biased toward the upper portion of the second portion 41b. In other words, the upper portions of the first portion 41a and the second portion 41b are configured in a clip shape that can clamp the plate-like member 5. In this case, there may be no gap D3 between the second portion 41b and the engagement portion 42. The opening portion 41d may be formed in the lower first portion 41a.

[0066] In the above-described embodiment, the surface contact process and the joining process are performed in a factory or the like before the process of inserting the drain 21 into the drainage pipe 1a. In this embodiment, the surface contact process and the joining process may be performed at the repair work site. In this case, the joining process, surface contact process, and engagement process are performed in this order after the process of inserting the drain 21 into the drainage pipe 1a. This will be explained in detail below.

[0067] [Joining process] Although not shown, the plate-shaped member 5 is heated with both longitudinal ends of the plate-shaped member 5 in contact with the inner surface of the cylindrical portion 21a. As a result, the plate-shaped member 5 itself is melted, and both longitudinal ends of the plate-shaped member 5 are bonded to the inner surface of the cylindrical portion 21a. However, the present invention is not limited to this. Heating the plate-shaped member 5 may melt the adhesive layer of the plate-shaped member 5, and the plate-shaped member 5 may be bonded to the cylindrical portion 21a. Alternatively, the plate-shaped member 5 may be bonded to the cylindrical portion 21a with an adhesive. The longitudinal middle portion of the plate-shaped member 5 is not bonded to the inner surface of the cylindrical portion 21a.

[0068] [Surface contact process] Next, as shown in Fig. 10, with the two plate-shaped members 5 facing each other and joined to the inner surfaces of the cylindrical portion 21a, the two surface-contact portions 41 are brought into surface-contact with the two plate-shaped members 5. Specifically, the second portion 41b of the surface-contact portion 41 is inserted between the plate-shaped member 5 and the cylindrical portion 21a from below the plate-shaped member 5. As a result, the front surface of the second portion 41b (the front surface in Fig. 9, the surface on the right in the figure) comes into surface-contact with the back surface of the plate-shaped member 5 (the rear surface in Fig. 9, the surface on the left in the figure). As a result, the plate-shaped member 5 is sandwiched between the first portion 41a and the second portion 41b.

[0069] [Engagement process] Next, as shown in FIG. 10, with the two engagement portions 42 facing each other, the engagement portions 42 are engaged with the holes at both ends of the stay 3a. Specifically, the stay 3a is artificially deformed in a direction in which both ends of the stay 3a approach each other. Next, in this state, one engagement portion 42 is inserted into the hole at one of the both ends of the stay 3a. Also, the other engagement portion 42 is inserted into the hole at the other of the both ends of the stay 3a. In this way, the stay 3a is engaged with the engagement portions 42. Next, the strainer 3 is fixed to the upper end of the stay 3a.

[0070] [3] In the above-described embodiment, the drain pipe 1a extends vertically from the horizontal plane of the waterproof base 1. The strainer 3 has a vertex portion, a center column portion, and multiple outer column portions. However, as shown in FIG. 11, the drain pipe 1a may extend horizontally from the vertical plane of the waterproof base 1. The strainer 3 may also be a mesh member attached to an inside corner of the waterproof layer 2.

[0071] [4] In the above-described embodiment, the fixing member 4 fixes the strainer 3 to the drain 21. However, the fixing member 4 may have other configurations. For example, as shown in Figures 12 and 13, the fixing member 4 may fix a lightning conductor support member 10 (an example of a fixed member) that supports the lightning conductor LC to the waterproof sheet 22. In this case, in the joining process, the plate-like member 5 is joined to the surface of the waterproof sheet 22.

[0072] In this embodiment, the lightning conductor LC extending along the waterproof layer 2 is supported by the upper part of the lightning conductor support member 10. The lightning conductor support member 10 has an opening extending in the vertical direction at the lower end of the lightning conductor support member 10. The engaging portion 42 of the fixing member 4 may be inserted into the opening of the lightning conductor support member 10 to engage with the lightning conductor support member 10.

[0073] The fixing member 4 may also fix a pipe support member (an example of a member to be fixed) that supports a pipe extending along the waterproof layer 2 to the waterproof sheet 22. In this case, the pipe is supported by the upper part of the pipe support member that extends in the vertical direction. Furthermore, the engaging portion 42 of the fixing member 4 engages with the lower part of the pipe support member.

[0074] In this embodiment, the surface contact step and the joining step are performed at the repair site. In this case, the step of inserting the drain 21 into the drainage pipe 1a is omitted, and the surface contact step, the joining step, and the engagement step are performed after the step of laying the waterproof sheet 22.

[0075] [5] In the above-described embodiment, the strainer 3 is made of metal. However, the strainer 3 may be made of resin. For example, the strainer 3 may be made of hard polyvinyl chloride resin, polycarbonate, polypropylene, or the like. In this case, the metal stay 3a is made of a different material from the strainer 3.

[0076] [6] In the above-described embodiment, the strainer 3 includes a plate-shaped stay 3a. This is not limiting, and the strainer 3 may not include the stay 3a. In this case, for example, the strainer 3 may include a coil spring extending from the lower end of the center pillar portion of the strainer 3 and a hook-shaped member attached to the tip of the coil spring. The strainer 3 is fixed to the engagement portion 42 of the fixing member 4 by the hook-shaped member. The strainer 3 may also include a wire extending from the lower end of the center pillar portion of the strainer 3 and an annular member attached to the tip of the wire. The strainer 3 is fixed to the engagement portion 42 of the fixing member 4 by the annular member.

[0077] [7] In the above-described embodiment, the engagement portion 42 is a bolt. However, the engagement portion 42 may have any other shape as long as it has a shape that allows engagement with the stay 3a of the strainer 3. The engagement portion 42 may be, for example, a rod-shaped member extending in a direction intersecting the contact surface S with the plate-shaped member 5 at the surface contact portion 41, and a hook-shaped member attached to the tip of the rod-shaped member. In this case, the hook-shaped member is engaged with a hole formed in the stay 3a.

[0078] [8] In the above-described embodiment, in the step of inserting the drain 21 into the drain pipe 1a, the drain 21 is inserted into the drain pipe 1a. However, this is not limiting, and an existing drain may remain in the drain pipe 1a. In this case, the drain 21 is inserted into the existing drain.

[0079] [9] If the existing drain is made of polyvinyl chloride or if the surface of an existing metal drain is coated with polyvinyl chloride, the process of inserting the drain 21 into the drainage pipe 1a may be omitted in the waterproofing layer 2 renovation work. In this case, in the joining process, the worker joins the plate-shaped member 5 to the surface of the existing drain. In other words, the strainer 3 is fixed to the existing drain by the fixing member 4.

[0080]

[10] In the above-described embodiment, in the joining step, the worker heats the plate-shaped member 5 to melt the plate-shaped member 5 itself and joins the plate-shaped member 5 to the inner surface of the cylindrical portion 21 a. However, the worker may melt the plate-shaped member 5 using a solvent and join the plate-shaped member 5 to the inner surface of the cylindrical portion 21 a.

[0081]

[11] In the above-described embodiment, in the joining step, the plate-shaped member 5 is joined to the surface of the drain 21 in a state in which the plate-shaped member 5 is inserted into the surface contact portion 41. However, this is not limited to this, and after one of both longitudinal end portions of the plate-shaped member 5 is joined to the cylindrical portion 21a of the drain 21, the surface contact portion 41 may be inserted into the plate-shaped member 5. In this case, after the surface contact portion 41 is inserted into the plate-shaped member 5, the other of both longitudinal end portions of the plate-shaped member 5 may be joined to the cylindrical portion 21a of the drain 21.

[0082]

[12] In the above-described embodiment, in the process of laying the waterproof sheet 22, the waterproof sheet 22 is laid on top of the existing waterproof layer 7. However, this is not limiting, and in the process of laying the waterproof sheet 22, the waterproof sheet 22 may be laid directly on the roof frame of the building. In this case, the existing waterproof layer 7 is removed in advance.

[0083]

[13] The configurations disclosed in the above-described embodiments (including other embodiments, the same applies below) can be applied in combination with configurations disclosed in other embodiments, unless a contradiction arises. Furthermore, the embodiments disclosed in this specification are merely examples, and the embodiments of the present invention are not limited thereto and can be appropriately modified within the scope of the purpose of the present invention. [Industrial Applicability]

[0084] The present invention is applicable to a fixing method for fixing a fixed member to a waterproof layer with a fixing member, a fixing member, and a drain. [Explanation of symbols]

[0085] 1: Waterproof base 1a: Drain pipe 2: Waterproof layer 21: Drain 22: Waterproof sheet 3: Strainer (fixed part) 3a: Stay 4: Fixing member 41: Surface contact area 41a: 1st part 41b :Second part 41d: Opening area 42: Engagement part 5: Plate-shaped member 10: Lightning conductor support member (fixed member) D3: Gap S: Contact surface

Claims

1. A fixing method for fixing a fixed member to a waterproof layer formed on a waterproof foundation using a fixing member, The waterproof layer is made of vinyl chloride, The fixing member is joined to the waterproof layer by a plate-shaped member made of vinyl chloride, The fixing member is a surface contact portion that comes into surface contact with the plate-like member; an engagement portion with which the fixed member is engaged, a surface contact step of bringing the surface contact portion into surface contact with the plate-like member; a joining step of joining the plate-shaped member to the surface of the waterproof layer; an engaging step of engaging the fixed member with the engaging portion.

2. The waterproof substrate includes a drainage pipe, The waterproof layer includes a surface layer of a cylindrical drain that is inserted into the drain pipe, the fixed member is a strainer that covers the drain to allow water to pass through, The fixing method according to claim 1 , wherein the joining step is a step of joining the plate-like member to the surface layer.

3. The fixing method according to claim 1 , wherein in the joining step, the surface contact portion is positioned between the waterproof layer and the plate-like member by joining the plate-like member to the surface of the waterproof layer.

4. A fixing member used in the fixing method according to any one of claims 1 to 3.

5. The fixing member according to claim 4 , wherein the engaging portion has a shape that allows a stay provided on the fixed member to engage with the engaging portion.

6. the engagement portion is a bolt extending in a direction intersecting a contact surface between the surface contact portion and the plate-like member, the surface contact portion has an opening portion through which the engagement portion can pass, The fixing member according to claim 4 , wherein the diameter of the opening portion is larger than the diameter of the engagement portion.

7. The fixing member according to claim 4 , wherein the surface contact portion has a C-shape in vertical cross section.

8. the engagement portion is a bolt that is provided on a first portion of the front side of the surface contact portion and extends in a direction intersecting a contact surface of the surface contact portion with the plate-like member, The fixing member according to claim 7 , wherein a gap is provided between the second portion on the far side of the surface contact portion and the engagement portion.

9. A cylindrical drain whose surface layer is made of vinyl chloride and which is inserted into a drain pipe, a plate-like member made of vinyl chloride and bonded to the surface layer; a fixing member to which a strainer that covers the drain to allow water to pass through is engaged, The fixing member is a surface contact portion that comes into surface contact with the plate-like member; and an engagement portion with which the strainer is engaged.

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