JP4701854B2 - Floor bread - Google Patents

Description

  The present invention relates to a floor pan in which a reinforcing plate is disposed on a lower surface side of a rib portion formed on a lower surface of a floor pan body.

  As a conventionally known floor pan, for example, as shown in Patent Document 1, there is one in which lattice-like ribs are integrally formed on the lower surface of a synthetic resin floor pan body for reinforcement.

  Since the rib is formed of a synthetic resin and has low strength, in Patent Document 1, a metal reinforcing plate is fixed to the lower surface of the lattice-like rib, thereby further reinforcing the floor pan body. Since this reinforcing plate is thin, the space from the floor pan installed on the floor surface to the floor surface can be widened via the legs provided with the adjuster bolts, and is disposed below the floor pan. Piping and legs can be easily constructed, and there is an advantage that a heat insulating space can be formed between the reinforcing plate and the floor pan to obtain high heat insulating properties.

However, in the above floor pan, the reinforcing plate is directly attached to the lower surface of the rib of the floor pan body. Therefore, when the bather wash or walks on the floor pan, the floor pan vibrates and the rib And noise is generated from the contact part of the reinforcing plate. In addition, there is a drawback that noise on the floor pan is transmitted downstairs via ribs and metal plates.
JP 2003-278207 A

  The present invention has been invented in view of the above-described conventional problems, and can reinforce the floor pan body with a reinforcing plate, and can prevent the generation of abnormal noise from the contact portion between the rib portion and the reinforcing plate. It is an object to provide a floor pan that can prevent noise on the floor pan from being transmitted downstairs.

In order to solve the above problems, a floor pan according to claim 1 of the present invention has a plurality of rib portions 5 projecting downward from a lower surface of a synthetic resin floor pan body 1, and the lower surfaces of the plurality of rib portions 5. A metal reinforcing plate 20 is arranged so as to be bridged between the rib portions 5 on the side, and a plurality of screws 19 inserted through the reinforcing plate 20 from below are fixed to the fixing portions 7 formed on the rib portions 5 to be rib portions. 5 mounting the reinforcing plate 20, a floor pan is interposed cushioning material 23 between the ribs 5 and the reinforcing plate 20 to form the rib portion 5 in a long, the fixing to the rib portion 5 A plurality of portions 7 are formed in the longitudinal direction of the rib portion 5 with an interval therebetween, and the fixing portions 7 protrude downward from the portion between the fixing portions 7 of the rib portion 5 so that the cushioning material 23 is elongated. It is formed in a band shape so that the long band-shaped cushioning material 23 extends over the plurality of fixing portions 7 of the rib portion 5. Characterized by comprising disposed along the longitudinal direction of the rib portion 5. With this configuration, the floor pan body 1 can be reinforced with the reinforcing plate 20 and, of course, the reinforcing plate 20 and the rib portion 5 can be prevented from being in direct contact by the cushioning material 23, whereby the rib portion 5 and the reinforcing plate 20 can be in contact with each other. It is possible to prevent abnormal noise from being generated from the portion and to prevent noise on the floor pan from being transmitted downstairs. Further, it is not necessary to attach the buffer material 23 to each fixing portion 7, so that the assemblability is improved. Further, the buffer material 23 can be arranged at a portion between the fixing portions 7 of the rib portion 5, and the buffer material 23 It is possible to prevent the reinforcing plate 20 that vibrates directly against the portion between the fixed portions 7, and to further prevent the generation of the abnormal noise and the transmission of noise.

Further, the floor pan according to claim 2 of the present invention forms a plurality of rib portions 5 projecting downward from the lower surface of the synthetic resin floor pan body 1, and the rib portions 5 are formed on the lower surface side of the plurality of rib portions 5. A metal reinforcing plate 20 is disposed so as to be bridged between the plurality of screws 19, and a plurality of screws 19 inserted through the reinforcing plate 20 from below are fixed to the fixing portions 7 formed on the rib portions 5. And a plurality of vertical rib portions 5a and a plurality of horizontal rib portions as rib portions 5 on the lower surface of the floor pan main body 1 with a cushioning material 23 interposed between each rib portion 5 and the reinforcing plate 20. 5b is formed to intersect with each other to form a rib 4 having a lattice shape in plan view, and a notch portion 8 is formed in the horizontal rib portion 5b so as to open downward, and the rib 4 having a lattice shape in plan view is formed through the notch portion 8. A plurality of rectangular spaces 9 that are continuous through the cutouts 8. A storage space 10 is formed, and the floor heating device 2 in which a portion stored in each rectangular space 9 and a portion stored in the notch portion 8 are continuously integrated in the storage space 10 is stored, and the fixing portion 7 is provided at the intersection 14 of the vertical rib portion 5a arranged across the cutout portion 8 and the horizontal rib portion 5b intersecting with the vertical rib portion 5a, and the reinforcing plate 20 is arranged across the cutout portion 8. Further, the reinforcing plate 20 is provided so as to be bridged between the vertical rib portions 5a, and is arranged below the portion constituting the storage space 10 including the cutout portion 8. With this configuration, the floor pan body 1 can be reinforced with the reinforcing plate 20 and, of course, the reinforcing plate 20 and the rib portion 5 can be prevented from being in direct contact by the cushioning material 23, whereby the rib portion 5 and the reinforcing plate 20 can be in contact with each other. It is possible to prevent abnormal noise from being generated from the portion and to prevent noise on the floor pan from being transmitted downstairs. In addition, the floor pan with the floor heating function can be obtained simply by storing the floor heating device 2 in which the portion accommodated in each rectangular space 9 and the portion accommodated in the notch 8 are continuously integrated in the storage space 10. In addition, the reinforcing plate 20 can prevent the heat generated in the floor heating device 2 from escaping to the lower side of the floor, thereby realizing energy saving. Moreover, the site | part in the floor pan main body 1 in which the rib reinforcement effect became weak by forming the said notch part 8 can be effectively reinforced.

The invention according to claim 3 is the invention according to claim 2, wherein the vertical rib portion 5a is formed in a long shape, and the fixing portion 7 provided at the intersection portion 14 with the horizontal rib portion 5b is formed on the vertical rib portion 5a. A plurality of the vertical rib portions 5a are formed at intervals in the longitudinal direction, and the fixing portions 7 protrude downward from the portion between the fixing portions 7 of the vertical rib portions 5a. The long band-shaped cushioning material 23 is arranged along the longitudinal direction of the vertical rib portion 5a so as to extend over the plurality of fixing portions 7 of the vertical rib portion 5a. There is no need to attach the cushioning material 23 to each of the fixing portions 7, and the assemblability is improved. Further, the cushioning material 23 can be arranged at a position between the fixing portions 7 of the vertical rib portion 5a, and is fixed by the cushioning material 23. It is possible to prevent the reinforcing plate 20 oscillating directly from hitting the portion between the portions 7, thereby further preventing the generation of the abnormal noise and the transmission of noise.

The floor pan according to claim 4 of the present invention has a plurality of rib portions 5 protruding downward from the lower surface of the synthetic resin floor pan body 1, and the rib portions 5 are formed on the lower surface side of the plurality of rib portions 5. A metal reinforcing plate 20 is disposed so as to be bridged between the plurality of screws 19, and a plurality of screws 19 inserted through the reinforcing plate 20 from below are fixed to the fixing portions 7 formed on the rib portions 5. A floor pan in which a cushioning material is interposed between each rib portion 5 and the reinforcing plate 20, and a screw hole 18 is formed on the lower surface of the fixing portion 7 of the rib portion 5, and is adhered to the screw hole 18. agent is injected, characterized in that screwed the screw 19 to the screw hole 18 that had been injected with the adhesive. In this case, the screw 19 can be firmly fixed to the screw hole 18 by the adhesive, and the mounting strength of the reinforcing plate 20 is increased.

  In the present invention, the floor pan body can be reinforced with the reinforcing plate, and it is possible to prevent abnormal noise from being generated from the contact portion between the rib portion and the reinforcing plate, and it is possible to prevent the noise on the floor pan from being transmitted downstairs.

  The floor pan of the present embodiment is a floor pan with a floor heating function in which a floor heating device 2 is disposed at the lower part of a floor pan body 1 that forms the floor of a bathroom washroom.

  As shown in FIG. 1 and the like, the floor pan main body 1 has a substantially rectangular shape (more specifically, a rectangle) in plan view, and is made of a synthetic resin molded product such as FRP. In FIG. 1, the reinforcing plate 20 is indicated by hatching, the cushioning material 23 is indicated by hatching opposite to the reinforcing plate 20, and the rib 4 is not shown.

  At the center of one end (the end on the bathtub side at the time of installation) of the floor pan main body 1 in the short direction (the direction indicated by the arrow a in FIG. 1) at the bottom of the floor pan main body 1 2 is formed, and a water gradient is provided on the upper surface of the bottom of the floor pan body 1 toward the drain port 3 as shown in FIG.

  As shown in FIG. 4, a plurality of long rib portions 5 projecting downward are formed integrally with the floor pan main body 1 on the lower surface of the bottom of the floor pan main body 1. As the rib portion 5, a plurality of long vertical rib portions 5 a that are long in the longitudinal direction of the floor bread body 1 (the direction indicated by the arrow B in FIG. 1) and a plurality of long horizontal portions that are long in the short direction of the floor bread body 1. Ribs 5b are formed. The vertical rib portion 5a and the horizontal rib portion 5b are formed in a range excluding the drain port portion 3 on the lower surface of the bottom portion of the floor pan main body 1 and intersect each other in a plan view. A lattice-like rib 4 is formed on the bottom surface of the bottom of the plurality of vertical rib portions 5a and horizontal rib portions 5b. That is, the ribs 4 having a lattice shape in plan view are formed in a substantially entire range of the bottom of the floor pan body 1. Here, the lower surface of the rib 4 is horizontal and located at the same level over the entire surface except for a leg mounting portion 6 and a fixing portion 7 which will be described later.

  A rectangular cut-out portion 8 that opens downward is formed at an arbitrary portion of the rib 4 in the plan view lattice, and is formed by the rib 4 in the plan view lattice through the cut-out portion 8. A plurality of rectangular spaces 9 are continuous, and a storage space 10 for storing the floor heating device 2 is formed by a plurality of rectangular spaces 9 a that are continuous through the notches 8.

  The storage space 10 is provided in the central part of the floor bread body 1 in two rows in the longitudinal direction of the floor bread body 1 and in two rows in the short direction of the floor bread body 1, for a total of four storage spaces. It consists of a plurality of rectangular spaces 9 arranged in a row in the longitudinal direction of the floor pan body 1. Each rectangular space 9 a constituting the storage space 10 has the same shape and area in plan view, and the area of each rectangular space 9 a is a rectangular located on the outer peripheral portion of the floor pan body 1 that does not constitute the storage space 10. It is larger than the shape space 9.

  The rectangular spaces 9a arranged in the longitudinal direction of the floor pan main body 1 constituting each of the storage spaces 10 have a partition wall portion 11 at a portion between the intersection portions 14 of the horizontal rib portion 5b with the vertical rib portion 5a. The notch portion 8 is formed by not forming the lateral rib portion 5b only at the central portion of each partition wall portion 11 in the short direction of the floor pan body 1. Accordingly, the notch 8 extends from the lower surface of the lateral rib 5b to the bottom of the floor pan body 1.

  The floor heating device 2 housed in each of the housing spaces 10 has a plurality of large portions 12 housed in the rectangular spaces 9 and small width portions 13 housed in the notches 8 alternately and continuously. It consists of a planar heater provided integrally, and a heating unit (not shown) is provided over all the large portions 12 that are continuous through the narrow portion 13. The floor heating device 2 is fitted into the storage space 10 from the lower side of the storage space 10 and is disposed in the storage space 10 with its upper surface being in contact with the lower surface of the bottom of the floor pan body 1.

  As shown in FIG. 2, a heat insulating material 31 made of polyurethane foam and a heat insulating material 32 made of expanded polystyrene are sequentially laminated on the lower surface side of the floor heating device 2 over substantially the entire surface. As shown in FIGS. 4 and 6, the floor heating device 2, the heat insulating material 31, and the heat insulating material 32 pass through a boss 38 that integrally protrudes from the bottom surface of the bottom of the floor pan body 1. The floor heating device 2, the heat insulating material 31, and the heat insulating material 32 are fixed in the storage space 10 by pressing the heat insulating material 32 from the lower surface side with a pressing plate 39 fixed to the lower end surface exposed on the lower surface side of the material 32 with screws 40. Has been.

  Moreover, in the site | part (a1 part in FIG. 4) which comprises the outer edge of the arbitrary one storage space 10a of the rib 4, and the site | part (a2 part in FIG. 4) which comprise the partition part of adjacent storage space 10, As shown in FIG. 5, the electric wire insertion notch 25 is partially formed so that the electric wires 26 of the floor heating device 2 accommodated in the respective storage spaces 10 are adjacent to each other via the electric wire insertion notch 25. It can be connected to the floor heating device 2 stored in the space 10, and the electric wire 26 drawn out from the floor heating device 2 stored in the storage space 10 a can be drawn out to the rectangular space 9 outside the storage space 10. Further, a boss-like portion 27 is formed on the rib portion 5 constituting the upper surface of the electric wire insertion notch 25, and a protective cover 29 that covers the electric wire 26 inserted into the electric wire insertion notch 25 in the boss-like portion 27. Can be fixed with a screw 30.

  Further, among a plurality of intersecting portions 14 (that is, intersecting portions 14 of the longitudinal rib portions 5a and the lateral rib portions 5b) of the ribs 4 in a plan view, an arbitrary plurality of intersecting portions 14 are rib portions as shown in FIG. The cylindrical portion 15 has a diameter larger than the thickness of 5. Of these cylindrical portions 15, an insert nut 16 is fixed to a lower portion in an arbitrary cylindrical portion 15 (in the illustrated example, the cylindrical portions 15 at the four corners of the floor pan body 1), thereby attaching the leg portion. Part 6 is formed. The insert nut 16 is screwed to the upper end of an adjuster bolt that is freely movable up and down provided on a leg (not shown), whereby the leg can be attached to each leg attachment 6. The level of the floor pan body 1 can be adjusted by operating the adjuster bolts of the legs when the floor pan is installed on the floor surface via the section.

  Further, as shown in FIG. 4 and the like, the intersection part 14 (that is, a plurality of positions with a space in the longitudinal direction of the vertical rib part 5a) of each vertical rib part 5a with the arbitrary horizontal rib part 5b is based on the thickness of the rib part 5. Are also formed as the bosses 17 having a large diameter, and specifically, the intersections 14 of the vertical ribs 5a constituting the storage spaces 10 with the horizontal ribs 5b and the horizontal ribs of the vertical ribs 5a in the vicinity of the storage space 10 The boss portion 17 is an intersection portion 14 with 5b (excluding the intersection portion 14 that becomes the cylindrical portion 15). In the center of the lower surface of each boss portion 17, a pilot hole into which a screw 19 used to attach a reinforcing plate 20 to be described later is screwed is formed as a screw hole 18. That is, in this example, each boss portion 17 is provided with a screw 19. The fixing portion 7 is fixed. Further, the cylindrical portion 15 and the fixing portion 7 on the lower surface of the lattice-like rib 4 protrude slightly downward (about 3 mm) from the portion between the intersection portions 14 of the vertical rib portion 5a and the horizontal rib portion 5b and are one step lower. .

  As shown in FIG. 1 and FIG. 3, a metal reinforcement that reinforces the floor pan main body 1 located on the lower surface side of the plurality of rib portions 5 of the floor pan main body 1 and located in the center of the floor pan main body 1 in a plan view. A plate 20 (specifically, an iron plate) is provided. The reinforcing plate 20 covers the lower side of each of the storage spaces 10, and in this example, the reinforcing plate 20 having an area and a shape that can cover the lower surfaces of the four storage spaces 10 is used.

  The reinforcing plate 20 is formed by cutting out the central portion of one side end portion of the rectangular metal plate (that is, the end portion on the drain outlet side at the time of assembly) into a rectangular shape. A screw insertion hole 21 is formed at a position corresponding to each screw hole 18, and a cylindrical portion hole 22 is formed at a position corresponding to the tubular portion 15.

  The reinforcing plate 20 is attached to the lower surface side of any plurality of rib portions 5 of the floor pan body 1 after the floor heating device 2, the heat insulating material 31, and the heat insulating material 32 described above are disposed in each storage space 10. Thus, the lower side of each storage space 10 of the floor pan body 1 is covered with the reinforcing plate 20, and the floor pan body 1 is reinforced by the reinforcing plate 20.

  Before attaching the reinforcing plate 20, a long band-shaped cushioning material 23 made of EPDM or the like is previously provided along the rib portion 5 on the lower surface of an arbitrary rib portion 5 of the floor pan body 1 as shown in FIG. When the reinforcing plate 20 is attached to the lower surface of the rib portion 5, the cushioning material 23 is interposed between each rib portion 5 and the reinforcing plate 20.

  A through hole for inserting a screw 19 is formed in advance in the long band-shaped cushioning material 23 at a position corresponding to the screw hole 18 of the fixing portion 7, and a plurality of the cushioning materials 23 constituting the storage space 10 are formed. Are attached to arbitrary vertical rib portions 5a located near the vertical rib portions 5a and the storage space 10 respectively. The cushioning material 23 is not provided on the lower surface of the lateral rib portion 5b, and each cushioning material 23 is stuck across a plurality of fixing portions 7 formed in the longitudinal direction of each longitudinal rib portion 5a.

  In order to attach the reinforcing plate 20 to the floor pan body 1 in which the cushioning material 23 is adhered to the lower surface of the rib 4, the reinforcing plate 20 is positioned and disposed below the storage space 10, and the upper surface of the reinforcing plate 20 is In contact with the lower surface of the buffer material 23 adhered to each vertical rib portion 5a, in this state, the screw 19 is inserted from below into each screw insertion hole 21 of the reinforcing plate 20 and the through hole of the buffer material 23 communicating therewith. The screw 19 is screwed into the screw hole 18 of the fixing portion 7 into which an adhesive has been previously injected. As a result, the reinforcing plate 20 is attached to the floor pan body 1 via the cushioning material 23, thereby forming a floor pan with the floor heating device 2. Here, for example, ThreeBond 1783 manufactured by ThreeBond Co., Ltd. is used as the adhesive, and the reinforcing plate 20 can be firmly attached to the floor pan body 1 by this adhesive, and the screws 19 can be prevented from loosening.

  In the floor pan assembled as described above, a plurality of long belt-like cushioning materials 23 in the short direction of the floor pan main body 1 are opposed to the reinforcing plate 20 parallel to the short direction of the floor pan main body 1. It is interposed between the plurality of ribs 5 of the floor pan body 1 and the reinforcing plate 20 in a state straddling the side. Further, the cylindrical portion 15 of the floor pan body 1 is exposed to the lower surface side from the cylindrical portion hole 22 of the reinforcing plate 20, and the drain port 3 of the floor pan body 1 is exposed from the rectangular cutout portion of the reinforcing plate 20. Is exposed on the lower surface side.

  In the floor pan, since the cushioning material 23 is interposed between the plurality of rib portions 5 of the floor pan main body 1 and the reinforcing plate 20, the cushioning material 23 causes the rib portion 5 and the reinforcing plate 20 to contact each other. It is possible to prevent abnormal noise from being generated and noise transmitted on the floor pan from being transmitted to the downstairs via the rib 4 and the reinforcing plate 20.

  In the floor pan of this example, a plurality of fixing portions 7 are formed on a long vertical rib portion 5a in a straight line in the longitudinal direction of the vertical rib portion 5a with an interval, and a plurality of fixing portions of the vertical rib portion 5a are formed. Since the long belt-like cushioning material 23 is arranged along the longitudinal direction of the vertical rib portion 5a so as to extend to 7, the cushioning material 23 has one end in the longitudinal direction as the longitudinal rib portion 5a when the floor pan is assembled. It is only necessary to press and stretch the other end and stick it along the vertical rib portion 5a, and it is not necessary to stick the cushioning material 23 to each fixing portion 7, and the labor is saved. Further, since the through holes for inserting the screws 19 are formed in the buffer material 23 in advance, when the buffer material 23 is attached to the vertical rib portion 5a, each through hole formed in the buffer material 23 is formed. And the positioning of each screw hole 18 of the floor pan body 1 can be easily performed. Furthermore, since the cushioning material 23 can be adhered to the portion between the fixing portions 7 of the vertical rib portion 5a by the above-described operation, the reinforcing plate 20 that vibrates directly hits the portion between the fixing portions 7 of the vertical rib portion 5a. And the occurrence of abnormal noise can be further prevented. Further, in this case, the cushioning material 23 can be attached only to a necessary portion, and the cost can be reduced.

  Furthermore, in this example, since the cylindrical portion 15 and the fixing portion 7 on the lower surface of the lattice-like rib 4 protrude slightly downward from the other portions, the lower surface of the portion other than the cylindrical portion 15 and the fixing portion 7 of the rib 4 The upper surface of the reinforcing plate 20 is located slightly apart. Accordingly, it is possible to prevent the portions other than the cylindrical portion 15 and the fixing portion 7 of the rib 4 from directly contacting the vibrating reinforcing plate 20 or indirectly contacting via the cushioning material 23. Occurrence and the like can be further prevented.

  Moreover, since the said reinforcement board 20 covers the lower side of the storage space 10 which accommodated the floor heating apparatus 2, the reinforcement board 20 can prevent the heat | fever of the floor heating apparatus 2 escaping under a floor, and can implement | achieve energy saving. Further, since the reinforcing plate 20 is disposed below the portion constituting the storage space 10 including the notch 8 of the rib 4, the notch 8 is formed in the floor pan body 1 by the reinforcing plate 20. The part where the reinforcement effect became weak can be reinforced.

The reinforcing plate 20 does not cover the entire lower side of the storage space 10 but covers only the central portion, but the reinforcing plate 20 may cover the entire lower side of the storage space 10. Further, as shown in FIG. 7, it is not necessary to form a through hole for inserting the screw 19 as shown in FIG. 7. In this case, the reinforcing plate 20 is attached to the rib 4 of the floor pan body 1. In mounting, the reinforcing plate 20 is positioned on the floor pan body 1 by looking at the rib 4 of the floor pan body 1.

It is a top view of the floor pan of the present invention. It is the sectional view on the AA line of FIG. It is the perspective view seen from the lower surface side of the floor pan same as the above. It is a bottom view of the floor pan which removed the buffer material and the reinforcement board same as the above. It is a disassembled perspective view of the a2 part of FIG. It is a disassembled perspective view of the a3 part of FIG. It is a decomposition | disassembly side sectional view of the a4 part of FIG. It is an expanded sectional view which shows a cylindrical part same as the above.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Floor pan main body 2 Floor heating apparatus 5 Rib part 7 Adhering part 8 Notch part 10 Storage space 18 Screw hole 19 Screw 20 Reinforcement plate 23 Buffer material

Claims (4)

A plurality of rib portions projecting downward from the lower surface of the floor pan body made of synthetic resin are formed, and a metal reinforcing plate is arranged on the lower surface side of the plurality of rib portions so as to be bridged between the rib portions. A floor pan in which a plurality of screws inserted from below are fixed to a fixing portion formed on each rib portion, a reinforcing plate is attached to the rib portion, and a cushioning material is interposed between each rib portion and the reinforcing plate, and the rib portion And forming a plurality of the fixing portions on the rib portion with an interval in the longitudinal direction of the rib portions, and projecting the fixing portions downward from the portion between the fixing portions of the rib portions, The cushioning material is formed in a long strip shape, and the elongated strip-shaped cushioning material is arranged along the longitudinal direction of the rib portion so as to cover a plurality of fixing portions of the rib portion. Floor bread. A plurality of rib portions projecting downward from the lower surface of the floor pan body made of synthetic resin are formed, and a metal reinforcing plate is arranged on the lower surface side of the plurality of rib portions so as to be bridged between the rib portions. A floor pan body in which a plurality of screws inserted from below are fixed to a fixing portion formed on each rib portion, a reinforcing plate is attached to the rib portion, and a cushioning material is interposed between each rib portion and the reinforcing plate. A plurality of vertical rib portions and a plurality of horizontal rib portions are formed as crossed ribs on the lower surface of the plate to form a lattice-like rib in plan view, and a notch portion that opens downward is formed in the horizontal rib portion, the notch portion A rectangular space formed by ribs having a lattice shape in plan view is made continuous through the plurality of rectangular spaces that are continuous through the notches, and a storage space is formed in the storage space. Floor with a continuous part and a part stored in the notch The baffle device is accommodated, and the fixing portion is provided at the intersection of the vertical rib portion arranged across the notch portion and the horizontal rib portion intersecting with the vertical rib portion, and the reinforcing plate is arranged across the notch portion. A floor pan characterized by being provided so as to be bridged between the formed vertical rib portions and disposing the reinforcing plate below a portion constituting the storage space including the cutout portion. The vertical rib portion is formed in a long shape, and a plurality of fixing portions provided at intersections with the horizontal rib portion are formed in the vertical rib portion with a space in the longitudinal direction of the vertical rib portion. Projecting below the portion between the fixing portions of the vertical rib portion, forming the cushioning material in a long strip shape, and extending the long strip-shaped cushioning material over the plurality of fixing portions of the vertical rib portion. The floor pan according to claim 2, wherein the floor pan is arranged along a longitudinal direction of the vertical rib portion . A plurality of rib portions projecting downward from the lower surface of the floor pan body made of synthetic resin are formed, and a metal reinforcing plate is arranged on the lower surface side of the plurality of rib portions so as to be bridged between the rib portions. A floor pan in which a plurality of screws inserted from below are fixed to a fixing portion formed on each rib portion, a reinforcing plate is attached to the rib portion, and a cushioning material is interposed between each rib portion and the reinforcing plate, and the rib portion anchor portion lower surface to form a screw hole of injecting an adhesive to the screw holes, the floor pan characterized in that screwed to the screw to screw holes injected with adhesive.

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