JP5660318B2 - Washroom floor - Google Patents

Description

  The present invention relates to a washroom floor.

  Conventionally, as a washroom floor incorporated in a bathroom unit, one having a waterproof pan made of FRP (Fiber Reinforced Plastic) on its base material is often used. As such a washing floor, in particular, there is no surface material (see, for example, Patent Document 1), and there is also a surface provided with a surface material in order to improve appearance design or impart waterproofness ( For example, see Patent Documents 2 and 3).

  The surface material disclosed in Patent Document 2 is obtained by coating a flat surface material only on the floor surface portion of the washing floor, and the surface material is not laminated on the drainage pit portion. If it is such a planar surface material, laminate molding can be employed in which a multilayer thin film material including a printed decorative layer is laminated and adhered. Since this laminate molding can efficiently produce a long sheet-like decorative sheet continuously, it is a technique capable of realizing various designs with high economic efficiency. However, the laminate molding is difficult to give a complicated three-dimensional shape such as a drain pit due to its manufacturing method. For this reason, when the waterproof pan is formed of a material that is not excellent in design and waterproof properties (for example, a foam material), the drain pit portion of the waterproof pan cannot be covered with a surface material formed by laminate molding.

  Moreover, the surface material currently disclosed by patent document 3 coat | covers a surface material on both a floor surface part and a drainage pit part, and integrally forms the floor surface part and the drainage pit part by press molding. The surface material formed by such press molding is difficult to impart various designs as compared with laminate molding.

  As described above, the method of attaching the laminated surface material is one of the methods for realizing a product with high design properties at a low cost, but it is also difficult to form a three-dimensional shape. . Under these circumstances, if a three-dimensional surface material having a high design is formed, for example, a floor member is formed of a laminated sheet-like member, and a drainage pit member separately formed by injection molding or the like It can be considered that the floor members are joined and integrated later.

JP 7-189310 A JP 2010-59652 A JP 2010-229791 A

  However, in the floor structure in which the floor member and the drain pit member are separately formed and integrated by some joining means, the joint portion is weaker than the conventional integrally molded product. In addition, the drainage pit member is generally placed with a cover member for blindfolding, and is also a place where the load of the user moving on the washing floor is applied, so when the load is applied, it is joined A load is applied to the part, and there is a high possibility that peeling or breakage will occur during long-term use. It can be said that the current washroom floor including such problems has a limit in the degree of freedom in designing the base material and the design as long as the molding method and structure are followed.

  Therefore, the present invention can prevent the joint portion from being peeled off or damaged in the surface material obtained by joining and integrating the floor surface member and the drainage pit member. An object of the present invention is to provide a washing floor that can improve the degree of freedom.

  In order to solve this problem, the present inventor has made various studies while paying attention to the structure for joining the floor surface portion and the drainage pit member. For example, all of the above-mentioned Patent Documents 1 to 3 are formed by integrally molding the floor portion and the drainage pit member, and the technique of joining and integrating the separately molded floor surface portion and the drainage pit member is the technique. In the first place, there was no problem of peeling or breakage of the joint. The present inventor, who has repeatedly studied in consideration of such conventional techniques, has come to obtain knowledge that leads to the solution of the problem.

  The present invention is based on such knowledge, and is a wash floor incorporated in a bathroom unit, a floor surface member constituting a floor surface portion of the wash floor, and a drain pit member constituting a drain pit portion of the wash floor. And a base material that supports the load applied on the floor surface portion of the washroom floor, and the surface material that is integrated by joining the upper end of the drainage pit member to the back surface of the end portion of the floor surface member A drain trap that is attached to a drain outlet formed at the bottom of the drain pit member and to which a drain pipe is connected, and a cover member that is placed on the drain pit member and covers the top of the drain pit member. Provided, and provided with a joint protection means for preventing the force applied from the cover member to the drain pit member from being transmitted to the joint between the floor member and the drain pit member.

  In the washing floor according to the present invention, since the surface material is provided on the base material, it is possible to employ a base material (for example, a floor pan made of foam material) having low appearance design and waterproofness. According to this, the choice of the material and manufacturing method of a base material spreads, and the freedom degree of base material design can be improved.

  In addition, in the washing floor according to the present invention, the floor surface portion and the drainage pit portion constituting the surface material are separately molded, so that the floor surface portion and the drainage pit portion are integrally molded, compared with a manufacturing method or product that integrally molds the floor surface portion and the drainage pit portion. The design that can be applied to the surface portion is increased, and an economically optimal decoration method can be combined, so that the degree of freedom and economics of design can be improved.

  Furthermore, in the washing floor according to the present invention, since the upper end of the drainage pit member is joined to the back of the end portion of the floor member, the drainage pit from the user in the bathroom with the cover member placed The part is not visible. For this reason, also in this respect, the design of the drain pit portion and its peripheral portion is improved. Moreover, when it joins as mentioned above, since the joint of a floor surface member and a drainage pit member is not exposed to the upper surface of a washroom floor, the drainage property which flows the said floor upper surface can be improved.

  In addition, in the washing floor according to the present invention, the force applied to the drainage pit member (such as the user's load applied on the cover member) is transmitted to the junction (the junction between the floor member and the drainage pit member). Since the joint protection means for suppressing the provision is provided, it is possible to prevent an excessive load from being applied to the joint. Therefore, even when a surface material that joins and integrates the floor surface part and the drainage pit part is used, the joint part is prevented from being peeled off or damaged, and the possibility of leading to water leakage is eliminated as much as possible. It is possible.

  It is preferable that the joint protection means in the washing floor is disposed below the drain pit member and transmits the force applied to the drain pit member from the cover member to the building floor. Since such a joint protection means can escape the force applied to the drain pit member using the space outside the bathroom (dead space) below the drain pit so as not to be transmitted to the junction, the drain pit member and the surface member It does not affect the design properties such as. And since this junction part protection means transmits force to a building floor, it can suppress more reliably that an excessive load is applied to a junction part.

  In addition, the joint protecting means on the washing floor is disposed immediately below the drain pit member, provided at a position spaced from the receiving portion for receiving the drain pit member, and the space directly below the drain pit member, and is grounded on the building floor It is preferable to have a grounding part and a transmission part that transmits the force received by the receiving part to the grounding part without interfering with the drain trap and the drain pipe. Generally, a drain trap and a drain pipe connected to the drain trap are arranged in a space directly below the drain pit. For this reason, if a grounding part to be grounded to the building floor is provided in the space directly below the drainage pit part, there is a possibility that the grounding part may interfere with the drainage pipe, and it is necessary to avoid the interference. Becomes troublesome. In this regard, according to the present invention, since the grounding portion is provided at a position separated from the space immediately below the drainage pit, the grounding portion is prevented from interfering with the drainage pipe and the workability (ease of construction) is improved. be able to.

  It is preferable that the above-described receiving portion is provided at a position directly below the placement portion on which the cover member of the drain pit member is placed. Since the receiving portion is provided immediately below the placement portion, it is possible to suppress the load on the joint portion as much as possible even when the rigidity of the drainage pit member itself is not high.

  Further, in the washing floor, the receiving part and the transmission part are preferably formed on the base material, and the grounding part is preferably a base material support leg for supporting the base material. According to this invention, it becomes possible to simplify the whole structure of a washing-room floor by effectively utilizing the base material which is an essential member from the first. In general, since the base material is formed with high rigidity to support the load on the floor surface portion, it is possible to more reliably prevent an excessive load from being applied to the joint portion.

  Further, in the washing floor, the drain trap is fixed to the drain through a clamping flange, and the base material is configured not to be interposed between the drain trap and the clamping flange in the vertical direction. Preferably it is. The flange tightening part (the part to be tightened by the tightening flange) is one of the parts that require water-stopping in particular, and if many members are stacked here, the tightening accuracy deteriorates accordingly. It is not preferable. In this respect, according to the present invention, since only the drain pit member is interposed in the flange tightening portion, the water stoppage of the trap mounting portion can be improved.

Further, in the washing floor, the joint protection means is disposed directly below the drain pit member, and a receiving part that receives the drain pit member, a grounding part that is grounded on the building floor, and a force received by the receiving part are applied to the grounding part. A receiving part and a transmitting part are formed in the drain trap, and the grounding part is a trap support leg that is suspended from the bottom of the drain trap and is grounded on the building floor. preferable. According to the present invention, it is possible to simplify the overall configuration of the washing floor by effectively utilizing the drain trap, which is an essential member.

Further, in the washing floor, the joint protection means is disposed directly below the drain pit member, and the receiving portion that receives the drain pit member, the grounding portion that is grounded on the building floor, and the force received by the receiving portion are applied to the grounding portion. It is also preferable that the receiving part is formed in the drain trap, the transmitting part is formed in the drain trap and the base material, and the grounding part is a base material support leg that supports the base material. . According to this invention, it is possible to simplify the whole structure of a washing-room floor by effectively utilizing the base material and drain trap which are originally essential members.

  According to the present invention, it is possible to prevent the joint portion from being peeled off or damaged in the surface material obtained by joining and integrating the floor surface portion and the drainage pit member, and the freedom of base material design and design design can be suppressed. The degree can be improved.

It is a perspective view which shows an example of the bathroom unit to which the washing-room floor concerning this invention was applied. It is a perspective view which shows the structural example of a washroom floor. It is a disassembled perspective view which shows the surface material, base material, etc. which comprise a washroom floor. (A) The perspective view which shows the floor surface member and drainage pit member which were shape | molded separately, (B) The perspective view of the surface material comprised by integrating these floor surface members and the drainage pit member. It is a longitudinal cross-sectional view of the drainage port periphery of the washroom floor which shows one Embodiment of this invention. It is a disassembled perspective view which shows the structural example of the member of a drain outlet periphery. It is a disassembled perspective view which shows the structural example of the member of a drain outlet periphery. It is a perspective view which shows the structural example of the surface of a drainage pit member. It is a perspective view which shows the structural example of the member around a drain outlet with a partial cross section. It is a longitudinal cross-sectional view of the drainage port periphery of the washroom floor which shows the 2nd Embodiment of this invention. It is a longitudinal cross-sectional view of the drainage port periphery of the washing-room floor which shows the 3rd Embodiment of this invention. It is a longitudinal cross-sectional view of the drainage port periphery of the washing-room floor which shows the 4th Embodiment of this invention.

  Hereinafter, the configuration of the present invention will be described in detail based on an example of an embodiment shown in the drawings.

  FIG. 1 shows an example of a washing floor according to the present invention. The washing place floor 1 according to the present invention includes a surface material 2, a base material 5, a drain trap 6, a trap cover (cover member) 7, and the like, and is further provided with a joint protection means 8.

  The washroom floor 1 is incorporated in the bathroom unit 10 and forms a washroom floor adjacent to the bathtub 200 (see FIG. 1 and the like). A drain port 11 is formed at the lowest position on the washing floor 1. The surface of the washing floor 1 (surface material 2) is provided with a drainage gradient so that the drainage port 11 is the lowest, and the water on the surface material 2 flows along the drainage gradient and the drainage pit 11 (the drainage pit) Water is collected in the member 4).

  The surface material 2 is a member that covers the entire surface of the substrate 5 and imparts waterproofness. The surface material 2 of the present embodiment includes a floor surface member 3 constituting the floor surface portion 1a of the washing floor 1 and a drainage pit member 4 constituting the drainage pit portion (indicated by symbol T in FIG. 5) of the washing floor 1. (See FIGS. 4 and 5). It is also preferable to employ a surface material 2 that improves the design of the washing floor 1 such as a pattern. Moreover, it is good also as providing the skin material 43 through the metal layer 42 in the drain pit member 4 (refer FIG. 8).

  In the present embodiment, the floor surface member 3 and the drainage pit member 4 are integrated by joining the upper end of the drainage pit member 4 to the rear surface of the end of the floor surface member 3 (see FIGS. 4 to 6). The means for integrating them is not particularly limited, but in this embodiment, the floor member 3 and the drain pit member 4 are joined by heat fusion so as to achieve both water tightness and high joining strength ( (See FIG. 5). In this case, if the drainage pit member 4 made of a material having a melting point lower than that of the floor member 3 is employed, the fact that the surface of the floor member 3 is relatively less soluble is utilized. Thus, it is possible to prevent the drainage performance and designability (formation of drainage grooves and satin) from being affected. Further, by adopting the drainage pit member 4 having a low melting point, it is possible to melt relatively more of the drainage pit member 4 and perform more firm fusion. As the drainage pit member 4 having a low melting point, for example, there is a member having a metal layer 42 that can be processed such as welding by electromagnetic induction heating or electric resistance Joule heat at the joint (see FIG. 8).

  Further, in the present embodiment, the upper end of the drainage pit member 4 is joined to the rear surface of the end portion inside the floor surface member 3 (close to the drainage port 11) (see FIGS. 5 and 6). In such a case, when the trap cover 7 is placed on the drain trap 6, the drain pit T cannot be seen by the user in the bathroom, so the design of the drain pit T and its surroundings can be improved. Can be planned. In addition, in such a case, since the joint between the floor member 3 and the drain pit member 4 is not exposed on the upper surface of the washing floor 1, it is possible to improve drainage flowing on the upper surface of the floor.

  The base material 5 is a member that is disposed below the floor surface member 3 and supports a load applied on the floor surface portion 1a of the washing floor 1 and is not particularly illustrated, but includes a bathroom wall panel, a ceiling panel, a bath chair, and a wash surface. It has sufficient strength so that it will not bend or break even when subjected to static loads such as containers or dynamic loads of users. Specifically, the base material 5 may be any one of a foam floor pan, a plate-shaped frame, a frame-shaped frame, and the like. Moreover, you may interpose the cushioning material 400 between the base material 5 and the surface material 2 (refer FIG. 7). The base material 5 illustrated in the present embodiment includes a work port 51 and a drainage opening 52, and is supported by, for example, base material support legs 53 at four corners (see FIG. 3).

  Further, the base material 5 is preferably provided with a waterproof property that does not allow hot water to leak out of the bathroom, but in the case of this embodiment configured to cover the entire surface of the base material 5 with the surface material 2, the base material 5 5 does not have to be sufficiently waterproof. Therefore, as a material of the base material 10, in addition to a thermosetting resin such as FRP that is generally used, a material obtained by reinforcing a thermoplastic resin such as polypropylene or polyethylene, and further, for example, a foam material It is possible to use a substrate with low waterproofness.

  The drain trap 6 is attached to a drain port 11 formed at the bottom of the drain pit member 4 (see FIG. 3 and the like). A bathtub drain port 62 is connected to the drain trap 6 via a bathtub drain pipe 61 (see FIG. 3). Further, a drain pipe 12 for flowing drainage is connected to the drain trap 6 (see FIGS. 5 and 6).

  The trap cover 7 is a cover that covers the upper portion of the drain pit member 4 (see FIGS. 2 and 3). The trap cover 7 is placed on the drain pit member 4 in a detachable state. The shape of the trap cover 7 is not particularly limited, but in this embodiment, the trap cover 7 having a wall portion 71 whose four sides are bent downward is used (see FIG. 5 and the like).

  Moreover, on the building floor 100, the mount frame 300 which supports the bathtub 200 grade | etc., Is installed (refer FIG. 1). The gantry 300 is configured by combining, for example, columnar metal materials (steel materials) vertically and horizontally, and has sufficient strength and durability to support a bathtub load in a state where bath water is accumulated and a bather is present. Have.

  Here, in the present embodiment, the drain trap 6 is fixed to the drain port 11 via a fastening flange 13 (see FIGS. 7 and 9). Further, in the present embodiment, the base material 5 is not interposed between the tightening flange 13 and the drain trap 6 in the vertical direction, and the flange tightening is one of the parts that require high water-stopping properties. Many members are prevented from being stacked on the portion (the portion to be tightened by the tightening flange 13), and the water stoppage of the tightening portion is improved (see FIG. 9).

  The joint protection means 8 prevents the force applied from the trap cover 7 to the drain pit member 4 from being transmitted to the joint between the floor member 3 and the drain pit member 4 (indicated by symbol C in FIG. 5 and the like). is there. Although the specific example of such a junction part protection means 8 is not specifically limited, In this embodiment, the junction part protection means 8 of the structure which has the receiving part 81, the earthing | grounding part 82, and the transmission part 83 is employ | adopted. (Refer to FIG. 5 etc.).

  The receiving portion 81 is disposed directly below the drain pit member 4 and is formed as a portion that receives the drain pit member 4. For example, in the present embodiment, a part of the base material 5 around the drain port 11 is protruded inwardly like a ridge, and the protruding portion is made to function as a receiving portion 81 (see FIG. 5). A load P acts on the receiving portion 81 via the wall portion 71. In addition, the load P here includes not only the load due to the weight of the trap cover 7 but also the load acting when the weight of the user or water is added.

  The ground contact portion 82 is provided at a position separated from the space directly below the drain pit member 4 and is formed as a portion to be grounded on the building floor 100. For example, in this embodiment, a member such as a so-called support rod disposed between the base material 5 and the building floor 100 is made to function as the grounding portion 82 (see FIG. 5). Further, in the general washing place floor 1, it is considered that the drain trap 6 and the drain pipe 12 connected to the drain trap 6 are arranged in the space directly below the drain pit member 4 (FIGS. 3 and 5). In this embodiment, by providing the grounding portion 82 at a position separated from the space directly below the drainage pit member 4, the grounding portion 82 is prevented from interfering with the drainage pipe 12 and the like, thereby improving workability. ing.

  The transmission part 83 is formed as a part that transmits the force received by the receiving part 81 to the grounding part 82 without interfering with the drain trap 6 and the drain pipe 12. For example, in the present embodiment, the peripheral portion of the drainage port 11 in the base material 5 is caused to function as a portion that transmits the force received by the receiving portion 81 to the grounding portion 82 (see FIG. 5 and the like).

  The number and arrangement of the above-mentioned grounding portions 82 are not particularly limited as long as they can release the load P to the building floor 100 and prevent the joint C from being peeled off or damaged. For example, as shown in FIG. Further, when the opening 52 of the base material 5, the outer frame of the drain pit member 4, the drain port 11, and the trap cover 7 are formed in a rectangular shape, it is preferable to arrange these grounding portions 82 at least at the four corners. By doing so, the load P can be transmitted more evenly and escaped to the building floor 100. In addition, in FIG. 5 etc., the cut surface of a cross section is not specifically defined. If the drain port 11 and the like are rectangular and the cut port is along a diagonal line, the diagonal grounding portion 82 (only) is illustrated in FIG. 5 and the like.

  As described so far, according to the washing floor 1 of the present embodiment, since the surface material 2 is provided on the base material 5, the base material having a low appearance design and waterproofness (for example, a foam floor pan). 5 can be adopted. That is, since it is possible to construct the wash floor 1 having waterproofing without using a base material such as a conventional FRP waterproof pan, the wash floor 1 can be formed by other manufacturing methods, and the like. The choice of the material and manufacturing method of the base material 5 is expanded, and the degree of freedom in base material design is increased.

  In this embodiment, since the floor member 3 and the drain pit member 4 constituting the surface material 2 of the washing floor 1 are separately formed (see FIG. 4 and the like), the floor 1a and the drain pit T Compared with the manufacturing method or product which integrally molds from the beginning, the degree of freedom in designing the floor member 3 (and the floor portion 1a constituted thereby) is also increased. Therefore, the degree of freedom in design of the surface material 2 can be improved.

  Furthermore, in the present embodiment, when the separately molded floor member 3 and the drain pit member 4 are joined, the joint protecting means 8 is provided, so that the force applied to the drain pit member 4 (on the trap cover 7) It is possible to prevent the user's load applied to the joint C from being transmitted to the joint C between the floor member 3 and the drainage pit member 4, so that an unreasonable load is not applied to the joint C. For this reason, also in the surface material 2 (surface material 2 which was not integrally molded from the beginning) which joined and integrated the floor surface member 3 and the drain pit member 4, the junction part C peels off or is damaged. It is possible to suppress the possibility of leaking water and to eliminate the possibility of leaking as much as possible.

  The above-described embodiment is an example of a preferred embodiment of the present invention, but is not limited thereto, and various modifications can be made without departing from the scope of the present invention. For example, in the present embodiment, one form of the joint protection means 8 that suppresses the force applied from the trap cover 7 to the drain pit member 4 from being transmitted to the joint C between the floor member 3 and the drain pit member 4 is shown. However (see FIG. 5), this configuration is only a preferred example.

  Hereinafter, another example of the joint protection means 8 will be shown as a second embodiment of the present invention (see FIG. 10). In the present embodiment, the receiving part 81 and the transmission part 83 of the joint protecting means 8 are formed on the base material 5. In such a case, a part of the base 5 that is essential in the washing floor 1 according to the present invention (for example, a step formed integrally near the opening 52) is used as a member that exhibits a receiving function and a transmission function. Since it can utilize effectively, it leads to simplification of the whole structure of the washing-room floor 1. Furthermore, in this embodiment, the support leg (base material support leg 53) which supports the base material 5 is used as the grounding part 82 (refer FIG. 10).

  Then, the other example of the junction part protection means 8 is shown as a 3rd Embodiment of this invention (refer FIG. 11). In the present embodiment, a receiving portion 81 is provided at a position directly below a placement portion (indicated by reference numeral 41 in FIG. 11) on which the trap cover (cover member) 7 of the drain pit member 4 is placed. As shown in FIG. 11, the receiving portion 81 in this case may be a part of the drain trap 6. Here, if the receiving portion 81 is not located directly below the placement portion 41, the load position and the support position are offset (a state shifted in the horizontal direction). 4 itself must have a considerable degree of rigidity (stiff enough to receive a load while suppressing deformation), and the degree of design freedom must be reduced. On the other hand, according to the present embodiment, such a situation can be avoided, and even when the rigidity of the drain pit member 4 itself is not high, it is possible to suppress the load on the joint C as much as possible.

  Further, as described above, when the catching portion 81 and the transmission portion 83 are formed in the drain trap 6, the trap support leg that is suspended from the bottom of the drain trap 6 and is grounded on the building floor 100 is connected to the ground portion. 82 (see FIG. 11). In this way, the ground contact portion 82 disposed at the lower portion of the drainage pit member 4 transmits the load P applied to the drainage pit member 4 from the trap cover 7 to the building floor 100. In the present invention, the drain trap 6 is indispensable, and if the joint protection means 8 is constructed using the essential configuration, the overall configuration of the washing floor 1 can be simplified. Further, by using such a joint protection means 8, a force applied to the drain pit member 4 is released so as not to be transmitted to the joint C while using the bathroom outside space (dead space) below the drain pit member 4. It becomes possible.

  Subsequently, still another example of the joint protecting means 8 will be shown as a fourth embodiment of the present invention. In the embodiment described above, the load P received from the trap cover 7 is received and transmitted to only one of the base material 5 and the drain trap 6. However, in this embodiment, the load P received by the drain trap 6 is the base material. 5 is transmitted to the grounding part 82 via FIG. In such a configuration, it is preferable that a part of the drain trap 6 and the base material 5 are directly or indirectly bonded. In this embodiment, the drain trap 6 is formed with a flange-like flange portion 63 extending in the horizontal direction, and the flange portion 63 is fastened to the back surface of the substrate 5 by fastening means 64 such as a screw ( (See FIG. 12). According to this, the junction protection means 8 is formed without forming a step or the like in the portion near the opening 52 of the base material 5 and without providing a trap support leg (grounding portion) at the bottom of the drain trap 6. Can be built.

1: Washing floor 1a: Floor surface part 2: Surface material 3: Floor surface member 4: Drainage pit member 5: Base material 6: Drainage trap 7: Trap cover (cover member)
8: Joint part protection means 10: Bathroom unit 11: Drain port 12: Drain pipe 13: Clamping flange 41: Placement part 81: Receiving part 82: Grounding part 83: Transmission part 100: Building floor C: Joint part T: Drainage pit section

Claims (8)

A washroom floor built into the bathroom unit,
It consists of a floor surface member constituting the floor surface portion of the wash floor and a drain pit member constituting a drain pit portion of the wash floor, and joining the upper end of the drain pit member to the rear surface of the end of the floor surface member. Integrated surface material,
A base material that is disposed at a lower part of the floor member and supports a load applied on the floor surface part of the washing floor;
A drain trap attached to a drain outlet formed at the bottom of the drain pit member, to which a drain pipe is connected,
A cover member placed on the drainage pit member and covering an upper part of the drainage pit member,
A washroom floor, characterized in that a joint protection means is provided for preventing the force applied from the cover member to the drain pit member from being transmitted to the joint between the floor member and the drain pit member.   2. The washing place floor according to claim 1, wherein the joint protection means is disposed at a lower portion of the drainage pit member and transmits a force applied from the cover member to the drainage pit member to a building floor. The joint protecting means is
A receiving portion that is disposed directly below the drain pit member and receives the drain pit member;
A grounding portion provided at a position separated from the space directly below the drainage pit member and grounded on the building floor;
The washing floor according to claim 2, further comprising: a transmission unit configured to transmit the force received by the receiving unit without interfering with the drain trap and the drain pipe to the grounding unit.   The washing place floor according to claim 3, wherein the receiving portion is provided at a position directly below a placement portion on which the cover member of the drain pit member is placed. The receiving part and the transmission part are formed on the base material,
The washing ground floor according to claim 3, wherein the grounding portion is a base material support leg that supports the base material. The drain trap is fixed to the drain through a fastening flange,
6. The washroom floor according to claim 5, wherein the base material is configured not to be interposed between the drain trap and the vertical direction of the clamping flange. The joint protecting means is
A receiving portion that is disposed directly below the drain pit member and receives the drain pit member;
A grounding part to be grounded on the building floor;
A transmission unit that transmits the force received by the receiving unit to the grounding unit;
The receiving part and the transmission part are formed in the drain trap,
The washing ground according to claim 2 , wherein the grounding portion is a trap support leg that is suspended from the bottom of the drain trap and is grounded on the building floor. The joint protecting means is
A receiving portion that is disposed directly below the drain pit member and receives the drain pit member;
A grounding part to be grounded on the building floor;
A transmission unit that transmits the force received by the receiving unit to the grounding unit;
The receiving part is formed in the drain trap, and the transmission part is formed in the drain trap and the base material,
The washing ground floor according to claim 2, wherein the grounding portion is a base material support leg for supporting the base material.

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