JP2008194087A - Bathtub lid - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bathtub lid having high safety and capable of being readily and accurately put to the opening of a bathtub at a predetermined position. <P>SOLUTION: The bathtub lid is provided with a plurality of positioning devices 6 having projections 16 hooking to the inside of the upper end edge 13 of the opening of the bathtub 10 along the peripheral edge of the back surface 3 of a lid body 11. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a bathtub lid.

As for the conventional bathtub lid, what puts a lid on the upper-end edge of a bathtub opening part is common. The purpose of the tub lid was to keep the hot water stored in the tub and to help warm the hot water by heating the lid when boiling or chasing, and to reduce the consumption of energy such as gas and electricity. Also, by applying the lid, it was possible to prevent dirt, insects, water droplets or dirt from the ceiling of the bathroom from falling into the bathtub. (See Patent Document 1)
JP-A-8-140875

  The problem to be solved is that, depending on how the bathtub lid is positioned insufficiently (the state of the lid), if an adult (or child) suddenly touches the hand, the bathtub lid tilts and falls into the bathtub. There was a risk of doing. In addition, a gap is created between the opening and the bathtub lid, impairing the heat insulation of the hot water stored in the bathtub and the improvement of the boiling water efficiency (due to the heat insulation effect), as well as water droplets and dirt from insects, dust, and the ceiling. Had fallen into the bathtub. Further, when the bathtub lid was placed, if the outer edge of the bathtub lid was slightly locked at the upper edge of the bathtub opening, the bathtub lid dropped into the bathtub and contaminated the hot water stored in the bathtub. Furthermore, the positioning of the bathtub lid in a bathtub having an uneven curved portion such as a headrest or a backrest with the upper edge of the bathtub opening raised is not particularly easy. That is, due to insufficient positioning of the bathtub lid, the original purpose of the bathtub lid may not be fully achieved.

  Therefore, an object of the present invention is to provide a bathtub lid that is highly safe and that can easily and reliably cover a bathtub opening without a gap.

  Therefore, in order to achieve the above object, the bathtub lid according to the present invention is provided with a plurality of positioning tools having protrusions that can be locked inside the upper edge of the opening of the bathtub along the periphery of the back surface of the lid body. It is a thing.

  Further, the bathtub lid according to the present invention is provided with a plurality of positioning tools having protrusions that can be locked inside the upper end edge of the opening of the bathtub along the periphery of the back surface of the lid body, and the lid body includes: The positioning tool includes an upper surface plate, a lower surface plate, a peripheral edge molding, and an internal heat insulating layer of foamed resin, and the positioning tool has a deformed protrusion on the upper surface of the protrusion, and a screw hole is formed from the upper surface of the protrusion. A deformed through hole corresponding to the protruding portion is provided along the periphery of the lower surface plate, and the protruding portion of the positioning tool is inserted into the through hole, and the screw member is screwed into the screw hole. The positioning tool is fixed to the bottom plate, and the upper end of the screw member is in close contact with the internal heat insulating layer of the foamed resin.

  Further, the bathtub lid according to the present invention is provided with a plurality of positioning tools having protrusions that can be locked inside the upper end edge of the opening of the bathtub along the periphery of the back surface of the lid body, and the lid body includes: The positioning tool includes an upper surface plate, a lower surface plate, a peripheral edge molding, and an internal heat insulating layer of foamed resin, and the positioning tool has a deformed protrusion on the upper surface of the protrusion, and a screw hole is formed from the upper surface of the protrusion. The screw member is screwed into the screw hole through the vertical cross-hatched hat-shaped spacer that is externally fitted to the ridge, and the positioning tool is fixed to the lower surface plate. The upper surface of the lower surface plate is pressed and the upper end of the screw member and the spacer are in close contact with the internal heat insulating layer of the foamed resin.

Further, the lid body has a concave curved surface shape so that the lid body is in close contact with the upper edge of the opening.
Moreover, the hardness of the said protrusion part is set lower than the hardness of the upper-end edge of the opening part of a bathtub.

According to the bathtub lid of the present invention, it is possible to easily and surely cover the bathtub opening at a predetermined position. In addition, since the positioning tool is locked to the upper edge of the opening of the bathtub, even if an adult or a child suddenly pokes the hand on the bathtub lid, the bathtub lid tilts and does not fall into the bathtub. Further, it is possible to prevent the bathtub lid from being accidentally dropped into the bathtub during the operation of placing the bathtub lid on the upper edge of the bathtub opening. In addition, the hot water in the bathtub is kept clean and the temperature is reliably maintained, so that the trouble of chasing and adding hot water can be reduced, and energy (electricity or gas) can be saved more reliably. Moreover, since the lid can be reliably applied even when boiling water (chasing), the temperature of the hot water can be assisted, and the energy saving effect can be obtained more reliably. In addition, the same effect can be surely obtained even in a bathtub having an upper and lower edge of the bathtub opening and an uneven curved portion such as a headrest or a backrest.
Moreover, since the positioning tool is screwed by the screw member and is in close contact with the inside of the bathtub lid, it is safe without dropping off. Moreover, since the screw member is not exposed to the outer surface of the bathtub lid, the screw member does not rust and is clean. Moreover, since the hardness of the positioning tool is low, the lid can be applied without damaging the upper edge of the bathtub opening.

Hereinafter, the present invention will be described in detail based on the illustrated embodiment.
The bathtub 10 illustrated in FIG. 1 has a raised upper edge 13 of the opening. Further, when viewed in a vertical plane with respect to the side surface in the longitudinal direction of the bathtub 10, the upper end edge 13 of the opening is formed in a concave curved shape.
1, 2 and 3, reference numeral 1 denotes a bathtub lid according to the present invention, and the bathtub lid 1 is formed in a concave curved surface shape along the shape of the upper edge 13. That is, as shown in FIG. 2, the bathtub lid 1 includes a lid body 11 having a concave curved surface so that the bathtub lid 1 is in close contact with the upper edge 13 of the opening of the bathtub 10 with the bathtub lid 1 applied. ing. Further, a positioning tool 6 is provided along the periphery of the back surface 3 of the bathtub lid body 11 so as to abut against and be engaged with the inner side of the upper end edge 13 of the opening of the bathtub 10. That is, the bathtub lid 1 is composed of the lid body 11 and the positioning tool 6.

  As shown in FIGS. 3 and 6, the lid body 11 of the bathtub lid 1 includes a top plate 4 that is substantially elliptical in plan view, a bottom plate 5 that is substantially elliptical in plan view, a peripheral edge molding 9, and a foamed resin. An internal heat insulating layer 15 is provided. The upper surface plate 4 has an upper surface 4 a that is exposed on the surface 2 of the lid body 11 and a lower surface 4 b that is inside the lid body 11. Further, the lower surface plate 5 has a lower surface 5 b exposed on the back surface 3 of the lid body 11 and an upper surface 5 a serving as the inside of the lid body 11. The peripheral edge molding 9 has two concave portions in the longitudinal direction in which the outer peripheral edge portion 4c of the upper surface plate 4 and the outer peripheral edge portion 5c of the lower surface plate 5 can be inserted. That is, the lid body 11 surrounds the periphery of the upper edge plate 4 and the lower face plate while inserting the respective concave grooves of the peripheral edge molding 9 along the outer peripheral edge portion 4c of the upper face plate 4 and the outer peripheral edge portion 5c of the lower face plate 5. 5 and a peripheral edge molding 9 are formed in a space 22, and urethane resin is injected into the space 22 from an injection port 21 provided in the peripheral edge molding 9 and foamed to form an internal heat insulating layer 15.

Moreover, the positioning tool 6 of the bathtub lid 1 is screwed to the lower surface plate 5 with a screw member 8 via a spacer 7. As shown in FIGS. 4 and 5, the positioning tool 6 is made of resin, has a hemispherical protrusion 16, and has a quadrangular columnar protrusion 17 protruding from the upper surface 18 of the hemispherical protrusion 16. Thus, a screw hole 20 is formed from the upper surface 19 of the protruding portion 17. In addition, a rectangular through-hole 14 is provided at the peripheral edge of the lower surface plate 5 so as to be able to prevent rotation by inserting the protruding portion 17. Reference numeral 7 denotes a spacer, which is a resin-molded, rectangular recess 23 that externally fits the protruding portion 17 inserted through the through hole 14, a circular flange 12 that can press the upper surface 5a of the lower surface plate 5, and a screw. It has a vertical cross-hatched hat shape having a through hole 24 through which the member 8 is inserted.
In other words, the upper surface 18 of the hemispherical projection 16 is inserted into the through hole 14 in contact with the lower surface 5 b of the lower surface plate 5, the concave portion 23 of the spacer 7 is connected to the flange 12 and the upper surface of the lower surface plate 5. 5a, the screw member 8 is inserted into the through hole 24 of the spacer 7 and screwed into the screw hole 20 of the positioning tool 6, so that the positioning tool 6, the spacer 7 and the screw member 8 The bottom plate 5 can be screwed so as to sandwich the bottom plate 5. Further, the spacer 7 and the screw member 8 are in the internal space 22 of the lid body 11 (on the upper surface 5a side of the lower surface plate 5). The lower surface plate 5 to which the positioning tool 6 is fixed as described above, the upper surface plate 4 and the peripheral edge molding 9 form the space 22 as described above. By molding 15, the spacer 7 and the screw member 8 are in close contact with the internal heat insulating layer 15. Further, as shown in FIG. 7A, three positioning tools 6 are provided at the apex positions of the isosceles triangles along the periphery of the back surface 3 of the lid body 11.

  In addition, the bathtub lid 1 is provided with a rectangular through hole 14 in the lower surface plate 5 at a position where the positioning tool 6 can abut against the inner side of the upper edge 13 of the opening of the bathtub 10 in the covered state. The dimensions are set such that the bathtub lid 1 is sufficiently locked to the upper edge 13 of the bathtub 10 in the lid state. Further, it is desirable that the bottom plate 5 and the rectangular through-hole 14 are stamped integrally.

  In the present invention, the design can be freely changed, and four or more positioning tools 6 may be provided as shown in FIG. 7B. Moreover, if it can be latched inside the opening upper end edge 13 of the bathtub 10 in the covered state, the arrangement is free. Moreover, the bathtub lid 1 is good also considering several sheets as 1 set. That is, as shown in FIGS. 7C to 7F, a set of two pieces of bathtub lids that are divided into two in the short direction to form a first bathtub lid divided piece 1a and a second bathtub lid divided piece 1b. 1 and the first bathtub lid divided piece 1a, the second bathtub lid divided piece 1b, and the third bathtub lid divided piece 1c as shown in FIGS. It is good also as a set of three bathtub lids. Besides this, the number of divisions and the division shape are free.

  Further, a plurality of positioning tools 6 are provided on one set of bathtub lids 1 and a plurality of positioning tools 6 are provided only on one bathtub lid split piece 1a as shown in FIGS. 7 (e), (f) and (j). Form may be sufficient. Moreover, as shown in FIG.7 (i), the some positioning tool 6 may be provided in the some bathtub cover division | segmentation piece 1a, 1b, and the form which does not provide the positioning tool 6 in the remaining bathtub lid division | segmentation piece 1c may be sufficient. By the way, the hardness of the positioning tool 6 is set lower than the hardness of the upper end edge 13 of the bathtub opening.

Further, as another embodiment of the positioning tool, as shown in FIG. 8A, a projecting portion 16 can be formed by a short cylindrical block-shaped member 30 having a screw hole 31 formed on the upper surface 30a. The member 30 is inserted into the through hole 34 formed in the lower surface plate 5 and the screw member 33 is inserted from the upper surface 5a of the lower surface plate 5 so that the member 30 can be screwed. ), A urethane resin is injected and foamed to form the internal heat insulation layer 15, and the screw member 33 and the internal heat insulation layer 15 are in close contact with each other. 6 is also acceptable.
Further, as shown in FIG. 9 (a), the positioning tool includes a short cylindrical portion 41 that becomes the protruding portion 16, and a member 40 having a screw portion 42 protruding from the upper surface 41a of the short cylindrical portion 41. As shown in FIG. 9 (b), the thread portion 42 is inserted into the through-hole 44 formed in the face plate 5 from the lower surface 5b and can be screwed to the fixing tool 43, as in the above-described embodiment. Alternatively, urethane resin may be injected and foamed to form the inner heat insulating layer 15 so that the fixing tool 43 and the inner heat insulating layer 15 are in close contact with each other, and the positioning tool 6 may be constituted by the member 40.

The usage method of the bathtub lid of this invention mentioned above is demonstrated.
The outer shape of the bathtub lid 1 according to the present invention is held so as to easily match the shape of the opening of the bathtub 10, and the hemispherical protrusion 16 of any one of the three positioning tools 6 is provided on the back surface 3 of the lid body 11. The inner side of the upper end edge 13 of the opening of the bathtub 10 is brought into contact. Next, the hemispherical protrusions 16 of the remaining two positioning tools 6 are brought into contact with the inner side of the upper end edge 13 of the opening, and the hemispherical protrusions 16 of the remaining positioning tool 6 are moved to the upper end edge 13 of the opening. By placing the bathtub lid 1 on the upper edge 13 of the opening so as to be inside the lid, the lid is in a covered state.

  Further, in the covered state, since the positioning tool 6 is inside the upper end edge 13, the horizontal misalignment moves only as much as the clearance between the positioning tool 6 and the opening upper end edge 13. Further, the outer periphery of the bathtub lid 1 is sufficiently locked to the upper end edge 13 of the bathtub 10. That is, even if the clearance is moved in the horizontal direction, the entire opening of the bathtub 10 is covered. Moreover, since the lid main body 11 of the bathtub lid 1 is formed so as to be in close contact with the upper end edge 13 of the opening of the bathtub 10 in the covered state, there is no vertical gap. Therefore, the opening of the bathtub 10 is completely sealed, and a heat retaining state is obtained. Further, the heat insulating state is further maintained by the internal heat insulating layer 15.

  As described above, the bathtub lid according to the present invention is provided with a plurality of positioning tools 6 along the periphery of the back surface 3 of the lid body 11, each having the protruding portion 16 that can be locked inside the upper edge 13 of the opening of the bathtub 10. Therefore, the lid can be easily applied to a predetermined position by abutting the projecting portion 16 of the positioning tool 6 and applying the lid. Further, since the positioning tool 6 is locked to the upper edge 13 of the opening of the bathtub 10, even if an adult or a child suddenly leans on the bathtub lid 1, the bathtub lid tilts and does not fall into the bathtub. It is safe. Further, it is possible to prevent the bathtub lid 1 from being accidentally dropped into the bathtub during the operation of applying the bathtub 1 to the upper end edge 13 of the bathtub opening. Moreover, since the lid can be formed at a predetermined position, the hot water in the bathtub can be reliably kept warm, and the trouble of reheating and adding hot water can be reduced. Moreover, since heat insulation can be ensured, consumption of useless energy (electricity or gas) can be reduced. Moreover, since the lid can be reliably applied even when boiling water (chasing), the temperature of the hot water can be assisted, and the energy saving effect can be obtained more reliably. In addition, since the lid can be reliably applied to a predetermined position, it is possible to protect against dirt, insects, and hot water such as water drops from the ceiling.

  In addition, as described above, the bathtub lid 1 according to the present invention has the positioning tool 6 having the protruding portion 16 that can be locked inside the opening upper end edge 13 of the bathtub 10 along the periphery of the back surface 3 of the lid body 11. A plurality of lid bodies 11 are provided with an upper surface plate 4, a lower surface plate 5, a peripheral edge molding 9, and an internal heat insulating layer 15 of foamed resin. A screw hole 20 is formed on the upper surface 18 and from the upper surface 19 of the protruding portion 17, and a deformed through hole 14 corresponding to the protruding portion 17 is provided along the periphery of the lower surface plate 5. The protruding portion 17 of the positioning tool 6 is inserted, the screw member 8 is screwed into the screw hole 20 and the positioning tool 6 is fixed to the lower surface plate 5, and the upper end of the screw member 8 is connected to the internal heat insulating layer 15 of foamed resin. Since it is in close contact, the lid can be easily applied at a predetermined position. Further, since the positioning tool 6 is locked to the upper edge 13 of the opening of the bathtub 10, even if an adult or a child suddenly leans on the bathtub lid 1, the bathtub lid tilts and does not fall into the bathtub. It is safe. Further, it is possible to prevent the bathtub lid 1 from being accidentally dropped into the bathtub during the operation of applying the bathtub 1 to the upper end edge 13 of the bathtub opening. Moreover, since the lid can be formed at a predetermined position, the hot water in the bathtub can be reliably kept warm, and the trouble of reheating and adding hot water can be reduced. Moreover, since heat insulation can be ensured, consumption of useless energy (electricity or gas) can be reduced. Moreover, since the lid can be reliably applied even when boiling water (chasing), the temperature of the hot water can be assisted, and the energy saving effect can be obtained more reliably. In addition, since the lid can be reliably applied to a predetermined position, it is possible to protect against dirt, insects, and hot water such as water drops from the ceiling. Moreover, since the screw member 8 is not exposed to the outside, the product of the present invention can be kept clean without rusting. Further, since the screw member 8 is not screwed upward (does not loosen) by being in close contact with the internal heat insulating layer 15 of the foamed resin, the positioning tool 6 is prevented from falling off and can be used safely. Further, by inserting and fixing the deformed protrusion 17 of the positioning tool 6 to the deformed through hole 14 of the lower surface plate 5, it is possible to prevent the positioning tool 6 from rotating during screwing and improve workability. When the force is applied to the positioning tool 6, it is not received only by the screw member 8 that is in close contact with the foamed resin, so that the strength is increased and the durability is improved.

  In addition, as described above, the bathtub lid 1 according to the present invention has the positioning tool 6 having the protruding portion 16 that can be locked inside the opening upper end edge 13 of the bathtub 10 along the periphery of the back surface 3 of the lid body 11. A plurality of lid bodies 11 are provided with an upper surface plate 4, a lower surface plate 5, a peripheral edge molding 9, and an internal heat insulating layer 15 of foamed resin. A screw hole 20 is formed from the upper surface 19 of the ridge 17 and is provided on the upper surface 18, and the screw member 8 is screwed into the screw hole 20 through a vertical cross-hatched hat-shaped spacer 7 that is externally fitted to the ridge 17. The positioning tool 6 is fixed to the lower surface plate 5 by screwing, the flange portion 12 of the spacer 7 presses the upper surface 5a of the lower surface plate 5, and the upper end of the screw member 8 and the spacer 7 are the internal heat insulating layer 15 of foamed resin. Since it is closely attached, the lid can be easily applied at a predetermined position. Further, since the positioning tool 6 is locked to the upper edge 13 of the opening of the bathtub 10, even if an adult or a child suddenly leans on the bathtub lid 1, the bathtub lid tilts and does not fall into the bathtub. It is safe. Further, it is possible to prevent the bathtub lid 1 from being accidentally dropped into the bathtub during the operation of applying the bathtub 1 to the upper end edge 13 of the bathtub opening. Moreover, since the lid can be formed at a predetermined position, the hot water in the bathtub can be reliably kept warm, and the trouble of reheating and adding hot water can be reduced. Moreover, since heat insulation can be ensured, consumption of useless energy (electricity or gas) can be reduced. Moreover, since the lid can be reliably applied even when boiling water (chasing), the temperature of the hot water can be assisted, and the energy saving effect can be obtained more reliably. In addition, since the lid can be reliably applied to a predetermined position, it is possible to protect against dirt, insects, and hot water such as water drops from the ceiling. Moreover, since the screw member 8 is not exposed to the outside, the product of the present invention can be kept clean without rusting. Further, since the screw member 8 is not screwed upward (does not loosen) by being in close contact with the internal heat insulating layer 15 of the foamed resin, the positioning tool 6 is prevented from falling off and can be used safely. Further, by inserting and fixing the deformed protrusion 17 of the positioning tool 6 to the deformed through hole 14 of the lower surface plate 5, it is possible to prevent the positioning tool 6 from rotating during screwing and improve workability. When the force is applied to the positioning tool 6, it is not received only by the screw member 8 that is in close contact with the foamed resin, so that the strength is increased and the durability is improved. In addition, since the force applied when the projecting portion 16 of the positioning tool 6 is brought into contact with the positioning work 6 is received by the spacer 7, the deformed protrusion 17 and the internal heat insulating layer 15 without being received only by the lower surface plate 5. Strength is increased and durability and quality can be improved. Further, by fixing through the spacer 7, the area that is in close contact with the foamed resin is increased by the surface area of the spacer 7, so that the fixing force is increased and the quality can be improved. Further, by transmitting the screw tightening force to the lower surface plate 5 at the flange portion 12 of the spacer 7, it is possible to prevent stress concentration on the lower surface plate 5, prevent damage to the lower surface plate 5 due to excessive tightening, and reduce the number of defective products. Can be reduced. Further, by fixing through the spacer 7, the length of the deformed protruding portion 17 of the positioning tool 6 in the protruding direction can be secured to a length necessary for the effective screw length of the screw hole 20. Can be obtained, and by providing a long screw hole 20 in the deformed protrusion 17 of the positioning tool 6, the restriction of the shape for securing the screw hole 20 in the protrusion 16 is relaxed, and the protrusion The size and shape of 16 can be set freely and design is free.

  Further, in the other embodiment of the positioning tool 6 shown in FIG. 8, the screw hole 31 is not in close contact with the heat insulating layer 15 of the foamed resin. Easy replacement. Further, in another embodiment of the positioning tool 6 shown in FIG. 9, the screw portion 42 is not in close contact with the heat insulating layer of the foamed resin, so that repair or replacement is performed when the member 40 serving as the positioning tool 6 is damaged. Can be done easily.

  In addition, as described above, the lid body 11 is formed in a concave curved surface so that the lid body 11 is in close contact with the upper edge 13 of the opening, so that the upper edge 13 of the opening is raised to form a complicated headrest and backrest. Even with a simple shape, there is no vertical gap. That is, since the bathtub opening is sealed and the hot water in the bathtub is reliably kept warm, it is possible to reduce the trouble of reheating and adding hot water, and to save energy (electricity or gas) more reliably. In addition, close contact with the upper edge 13 increases contact resistance (friction resistance), and even if there is a steep slope such as a headrest, the bathtub lid 1 falls off and the hot water becomes dirty. Prevent unnecessary cleaning work.

  Moreover, since the hardness of the protrusion 16 is set lower than the hardness of the opening upper end edge 13 of the bathtub 10, the friction coefficient with respect to the upper end edge 13 of the positioning tool 6 is increased, and the elasticity of the positioning tool 6 is increased. Combined with the increase in the contact area accompanying the deformation, it is possible to more effectively prevent the bathtub lid from falling into the bathtub 10. Further, damage to the upper edge 13 can be prevented.

It is a perspective view explaining the use condition of one embodiment of the present invention. It is sectional drawing of a use condition. It is a principal part cross-sectional perspective view. It is a principal part disassembled perspective view. It is a principal part assembly cross-sectional perspective view which shows the state before foaming resin injection | pouring. It is principal part sectional drawing. It is a top view which shows various Examples. It is explanatory drawing which shows another Example. It is explanatory drawing which shows another Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bathtub lid 2 Front surface 3 Back surface 4 Upper surface board 5 Lower surface board 5a Upper surface 6 Positioning tool 7 Spacer 8 Screw member 9 Perimeter edge molding
10 Bathtub
11 Lid body
12 Buttocks
13 Upper edge
14 Through hole
15 Internal insulation layer
16 Protrusion
17 Ridge
18 Top view
19 Top view
20 Screw hole

Claims (5)

  A plurality of positioning tools (6) having protrusions (16) that can be locked inside the upper edge (13) of the opening of the bathtub (10) are provided along the periphery of the back surface (3) of the lid body (11). A bathtub lid characterized by that. A plurality of positioning tools (6) having protrusions (16) that can be locked inside the upper edge (13) of the opening of the bathtub (10) are provided along the periphery of the back surface (3) of the lid body (11). ,
The lid body (11) further includes an upper surface plate (4), a lower surface plate (5), a peripheral edge molding (9), and an internal heat insulating layer (15) of foamed resin,
The positioning tool (6) has a deformed protrusion (17) on the upper surface (18) of the protrusion (16), and a screw hole (20) is formed from the upper surface (19) of the protrusion (17). And
A deformed through hole (14) corresponding to the protruding portion (17) is provided along the periphery of the lower surface plate (5), and the protrusion of the positioning tool (6) is provided in the through hole (14). The ridge (17) is inserted, the screw member (8) is screwed into the screw hole (20), and the positioning tool (6) is fixed to the lower surface plate (5), and the screw member (8) A bathtub lid characterized in that an upper end is in close contact with the internal heat insulating layer (15) of the foamed resin. A plurality of positioning tools (6) having protrusions (16) that can be locked inside the upper edge (13) of the opening of the bathtub (10) are provided along the periphery of the back surface (3) of the lid body (11). ,
The lid body (11) further includes an upper surface plate (4), a lower surface plate (5), a peripheral edge molding (9), and an internal heat insulating layer (15) of foamed resin,
The positioning tool (6) has a deformed protrusion (17) on the upper surface (18) of the protrusion (16), and a screw hole (20) is formed from the upper surface (19) of the protrusion (17). And
A screw member (8) is screwed into the screw hole (20) through a hat-shaped spacer (7) with a vertical cross-sectional hook that is externally fitted to the ridge (17), and the positioning tool (6). Is fixed to the lower surface plate (5), and the flange portion (12) of the spacer (7) presses the upper surface (5a) of the lower surface plate (5), and the upper end of the screw member (8) and the spacer (7) The bathtub lid characterized by being closely_contact | adhered with the internal heat insulation layer (15) of the said foaming resin.   The bathtub lid according to claim 1, 2 or 3, wherein the lid main body (11) has a concave curved surface shape so that the lid main body (11) is in close contact with the upper end edge (13) of the opening.   The bathtub lid according to claim 1, 2, 3 or 4, wherein the hardness of the protrusion (16) is set lower than the hardness of the upper end edge (13) of the opening of the bathtub (10).

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