JPH0975252A - Rack for bathtub - Google Patents

Abstract

PROBLEM TO BE SOLVED: To bathe a child or a pet easily by composing a bathtub rack wherein the level of warm water can be changed optionally, by combining an intermediate bottom plate made up of an intermediate plate and a float, legs which can be extended upwardly, and supports having an overlap. SOLUTION: To use a bathtub rack, first of all, an intermediate bottom plate made up of an intermediate plate 2 and a float 3 is placed in a bathtub 1 and the buoyancy of the float 3 is adjusted by opening a buoyancy adjusting plug 4. At this time, the internal pressure of supporting legs 5 drops and a check valve 101 opens, and the supporting legs 5 elongate while absorbing warm water and stop at a level appropriate to the level of warm water. When a bather steps onto the intermediate bottom plate, the internal pressure of the supporting legs 5 rises and closes the check valve 101. When a release button 8 is depressed, the internal pressure of a capillary 7 and the supporting legs 5 are released, and the intermediate bottom plate sinks. Then, when the release button 8 is released from depression, the internal pressure of the supporting legs 5 recovers and supports the intermediate bottom plate in a prescribed position. As a result, the bather can bathe with a prescribed warm water level.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention makes it possible to effectively and arbitrarily change the depth of hot water in a bathtub when the bathtub is used.
It relates to a tub mount.

[0002]

2. Description of the Related Art Conventionally, when using a bathtub, for example, when taking a bath, since a general bathtub has a constant depth, the bathtub is adjusted to be adjusted according to the posture of a child, an adult, or a bather. This is difficult because it involves water supply and drainage. In addition, when washing articles using so-called remaining hot water or bathing pets such as dogs and cats, making the depth of hot and cold water lowers the water level and worsens the work posture and defeats the purpose. Become.

In order to solve this problem, a method is provided in which a hook portion is provided on the inner wall of the bathtub to hook the intermediate bottom plate, and the number of supporting leg units arranged at the bottom portion of the bathtub is increased or decreased in the height direction, and the intermediate portion is placed on the middle portion. A method of changing the water depth of the bottom plate, a method of changing the water depth of the intermediate bottom plate by air pressure, hydraulic pressure, or tap water pressure in the elevating means arranged at the bottom of the bath has already been proposed.

[0004]

The present invention achieves the object by arranging the intermediate bottom plate and the supporting portion in the bathtub without requiring any mechanism in the bathtub body, in contrast to the above-mentioned prior art,
Do not use pneumatic, hydraulic or tap water pressure. Therefore, there is provided a bathtub mount which does not have the inconvenience that the temperature of the hot water in the bathtub lowers and which can realize an arbitrary depth of hot water which suits the purpose of use without changing the water level.

[0005]

A first feature of the means for solving the problems is that, in a bathtub mount provided with an intermediate bottom plate and a support part, support legs that are passively expanded and contracted in the height direction, and a weight part. That is, it is configured to include a support portion including. A second feature is that in a bathtub pedestal including an intermediate bottom plate and a supporting portion, the pedestal includes a supporting leg that is connected to the intermediate bottom plate at the top portion and a weight portion at the bottom portion to passively expand and contract, and a supporting portion having a weight portion. Is to configure. The third feature is that in a bathtub pedestal equipped with an intermediate bottom plate and a supporting portion, the supporting legs are connected to the intermediate bottom plate at the top portion and the weight portion at the bottom portion so as to passively expand and contract. It is configured to include a support leg that passively absorbs water, passively drains the hot water when contracting, and retains the hot water when neither expanding nor contracting, and a supporting portion having a weight portion. A fourth feature is that in a bathtub pedestal having an intermediate bottom plate and a support portion, a support leg that is passively expanded and contracted by connecting the intermediate bottom plate at the top portion and the weight portion at the bottom portion, and a check valve,
Equipped with pressure release means, passively absorbs hot and cold water from the check valve during expansion, passively drains and contracts the hot and cold water by the pressure release means, and closes when pressure release means does not operate. It is configured to include a support leg that is allowed to stay and a support portion that includes a weight portion. A fifth feature is that in a bathtub pedestal having an intermediate bottom plate and a support portion, a check valve and a pressure release are provided on a support leg in a container shape that is passively expanded and contracted by connecting the intermediate bottom plate at the top portion and the weight portion at the bottom portion. Means for passively absorbing hot water in the bathtub from the check valve during expansion, passively draining and contracting the hot water by the pressure release means, and closing the hot water when the pressure release means does not operate The support leg thus configured and the support portion including the weight portion are provided. A sixth feature is that in a bathtub mount including an intermediate bottom plate and a support portion, a bellows-shaped container-shaped support leg that is passively expanded and contracted by connecting the intermediate bottom plate at the top portion and the weight portion at the bottom portion,
Equipped with a check valve and pressure release means, passively absorbs hot and cold water from the check valve during expansion, passively drains and contracts the hot water from the check valve, and closes when pressure release means does not operate Then, it is configured to include a support leg configured to retain the hot water and a support portion including a weight portion.

A seventh feature is that in a bathtub mount having an intermediate bottom plate and a supporting portion, an intermediate bottom plate having a buoyancy force greater than its own weight with respect to the hot water of the bathtub, and a support leg that passively expands and contracts in the height direction, That is, it is configured by including a supporting portion including a weight portion. The eighth feature is that in a bathtub pedestal equipped with an intermediate bottom plate and a supporting portion, an intermediate bottom plate that has a buoyancy force greater than its own weight with respect to the hot water of the bathtub, an intermediate bottom plate at the top, and a weight portion at the bottom are passively connected. It is configured to include a support leg that expands and contracts and a support portion that includes a weight portion. The ninth feature is that, in a bathtub mount having an intermediate bottom plate and a support part, an intermediate bottom plate that has a buoyancy force greater than its own weight against the hot and cold water of the bathtub, a middle bottom plate at the top, and a weight part at the bottom are passively connected. With a support leg that is made to expand and contract, passively absorbs hot and cold water in the bathtub when expanding, passively drains the hot and cold water when contracting, and a supporting leg that retains the hot and cold water when there is neither expansion nor contraction, That is, it is configured by including a supporting portion including a weight portion. The tenth feature is that, in a bathtub pedestal equipped with an intermediate bottom plate and a support portion, an intermediate bottom plate having a buoyancy force greater than its own weight with respect to the water in the bathtub, an intermediate bottom plate at the top, and a weight portion at the bottom are passively connected. The extendable support leg is equipped with a check valve and pressure release means.When extending, the check valve passively absorbs hot and cold water from the bathtub, and the pressure release means passively drains and contracts the hot and cold water. A support leg that is closed when the means does not operate and retains the hot water.
That is, it is configured by including a supporting portion including a weight portion. An eleventh feature is that, in a bathtub mount having an intermediate bottom plate and a support portion, the intermediate bottom plate having a buoyancy force higher than its own weight with respect to the hot water of the bathtub, the intermediate bottom plate at the top, and the weight portion at the bottom are passively connected. The support leg in the shape of a container that expands and contracts is equipped with a check valve and pressure release means.When expanding, the check valve passively absorbs hot and cold water in the bathtub, and the pressure release means passively drains and contracts the hot and cold water. It is configured to include a support leg that is closed so that the hot and cold water stays when the pressure releasing means does not operate, and a support portion that includes a weight portion. A twelfth feature is that, in a bathtub pedestal including an intermediate bottom plate and a supporting portion, an intermediate bottom plate having a buoyancy force higher than its own weight with respect to hot and cold water in the bathtub, an intermediate bottom plate at the top, and a weight portion at the bottom are passively connected. An expandable bellows type container-shaped support leg equipped with a check valve and pressure release means,
Support that passively absorbs hot and cold water from the check valve during extension, passively drains and contracts the hot and cold water by the pressure release means, and closes and retains the hot and cold water when the pressure release means does not operate. It is configured to include a leg and a support portion including a weight portion.

A thirteenth feature is, in a bathtub pedestal having an intermediate bottom plate and a supporting portion, an intermediate bottom plate having a floating body, a supporting leg that is passively expandable and contractible in a height direction, and a supporting portion having a weight portion. Be prepared and configured. A fourteenth feature is, in a bathtub pedestal including an intermediate bottom plate and a support portion, an intermediate bottom plate including a floating body, a support leg that is connected to the intermediate bottom plate at the top portion and a weight portion at the bottom portion to passively expand and contract, and a weight portion. That is, it is configured to include a support portion including. A fifteenth feature is, in a bathtub pedestal including an intermediate bottom plate and a supporting portion, an intermediate bottom plate including a floating body, and a supporting leg that is passively expandable and contractible by connecting the intermediate bottom plate at the top and the weight portion at the bottom. , Support legs that passively absorb the hot and cold water of the bathtub during extension, passively drain the hot and cold water during contraction, and retain the hot and cold water when there is neither extension nor contraction, and a support part with a weight part. Be prepared and configured. A sixteenth feature is, in a bathtub pedestal including an intermediate bottom plate and a supporting portion, an intermediate bottom plate including a floating body, and a supporting leg that is passively expanded and contracted by connecting the intermediate bottom plate at the top and the weight portion at the bottom,
Equipped with a check valve and pressure release means, passively absorbs hot and cold water from the check valve during expansion, passively drains and contracts the hot water from the check valve, and closes when pressure release means does not operate Then, it is configured to include a support leg configured to retain the hot water and a support portion including a weight portion. Seventeenth
The feature of is, in a bathtub stand having an intermediate bottom plate and a support part, an intermediate bottom plate provided with a floating body, and a container-shaped support leg that is connected to the intermediate bottom plate at the top part and the weight part at the bottom part to passively expand and contract,
Equipped with a check valve and pressure release means, passively absorbs hot and cold water from the check valve during expansion, passively drains and contracts the hot water from the check valve, and closes when pressure release means does not operate Then, it is configured to include a support leg configured to retain the hot water and a support portion including a weight portion. Eighteenth
The feature of is that in a bathtub pedestal having an intermediate bottom plate and a supporting portion, an intermediate bottom plate having a floating body, and a bellows-shaped container-shaped supporting leg that is connected to the intermediate bottom plate at the top and the weight portion at the bottom to expand and contract passively. In addition, the check valve and the pressure releasing means are provided, and when the water is extended, the check valve passively absorbs the hot and cold water in the bathtub, and the pressure releasing means passively drains and contracts the hot and cold water, and the pressure releasing means does not operate. At this time, the support leg is configured to be blocked so that the hot and cold water is retained, and the support portion including the weight portion is provided.

A nineteenth feature is that in a bathtub pedestal having an intermediate bottom plate and a supporting portion, the intermediate bottom plate having a floating body and a buoyancy adjusting means, a support leg that is passively stretchable in the height direction, and a weight portion are provided. It is to be configured with a supporting portion. A twentieth feature is, in a bathtub mount including an intermediate bottom plate and a support portion, an intermediate bottom plate including a floating body and buoyancy adjusting means, and a support leg that is passively extended and contracted by connecting the intermediate bottom plate at the top portion and the weight portion at the bottom portion. And a supporting portion having a weight portion. The twenty-first feature is that in a bathtub pedestal including an intermediate bottom plate and a support portion, the intermediate bottom plate including a floating body and buoyancy adjusting means is connected to the intermediate bottom plate at the top and the weight portion at the bottom so as to passively expand and contract. A support leg that passively absorbs hot and cold water in the bathtub during extension, passively drains the hot and cold water during contraction, and retains the hot and cold water when there is neither extension nor contraction, and a weight portion. It is to be configured with a supporting portion. The 22nd feature is that in a bathtub pedestal including an intermediate bottom plate and a supporting portion, an intermediate bottom plate including a floating body and buoyancy adjusting means, and a support leg that is passively extended and contracted by connecting the intermediate bottom plate at the top portion and the weight portion at the bottom portion. In addition, the check valve and the pressure releasing means are provided, and when the water is extended, the check valve passively absorbs the hot and cold water in the bathtub, and the pressure releasing means passively drains and contracts the hot and cold water, and the pressure releasing means does not operate. At this time, the support leg is configured to be blocked so that the hot and cold water is retained, and the support portion including the weight portion is provided. The twenty-third feature is, in a bathtub pedestal having an intermediate bottom plate and a supporting portion, an intermediate bottom plate having a floating body and buoyancy adjusting means, and a container shape that is passively expanded and contracted by connecting the intermediate bottom plate at the top and the weight portion at the bottom. The support leg is provided with a check valve and a pressure release means, passively absorbs the hot and cold water of the bathtub from the check valve at the time of extension, and the pressure release means passively drains and contracts the hot and cold water. It is configured to include a supporting leg that is closed so that the hot and cold water stays when it does not operate, and a supporting portion that includes a weight portion. A twenty-fourth feature is a bathtub mount including an intermediate bottom plate and a supporting portion, an intermediate bottom plate including a floating body and buoyancy adjusting means, and a bellows type that is passively expanded and contracted by connecting the intermediate bottom plate at the top and the weight portion at the bottom. With a container-shaped support leg, a check valve and a pressure release means are provided.When expanding, the hot water of the bathtub is passively absorbed from the check valve, and the hot water is passively drained and contracted by the pressure release means. It is configured to include a support leg that is closed so that the hot and cold water stays when the pressure releasing means does not operate, and a support portion that includes a weight portion.

The twenty-fifth feature is that in a bathtub stand having an intermediate bottom plate and a support portion, a float and a buoyancy adjusting means are provided,
An intermediate bottom plate that uses hot and cold water in the bathtub as a buoyancy adjusting medium, support legs that passively expand and contract in the height direction, and a support portion that includes a weight portion are configured. A twenty-sixth feature is, in a bathtub mount provided with an intermediate bottom plate and a support portion, an intermediate bottom plate that includes a floating body and buoyancy adjusting means, and uses hot and cold water in the bathtub as a buoyancy adjusting medium, an intermediate bottom plate at the top, and a weight portion at the bottom. It is configured by including a support leg that is passively expanded and contracted by being connected to the support leg and a support portion that includes a weight portion. A twenty-seventh feature is, in a bathtub mount provided with an intermediate bottom plate and a support portion, an intermediate bottom plate that includes a floating body and buoyancy adjusting means, and uses hot and cold water in the bathtub as a buoyancy adjusting medium, an intermediate bottom plate at the top, and a weight portion at the bottom. With the support leg that is passively expanded and contracted by connecting to, the hot water of the bathtub is passively absorbed when expanding, the hot water is passively drained when contracting, and the hot water stays when there is neither expansion nor contraction. It is configured by including a supporting leg having the above-mentioned structure and a supporting portion having a weight portion. Twenty-eighth
The feature of the is that in a bathtub pedestal having an intermediate bottom plate and a supporting portion, the floating base and the buoyancy adjusting means are provided, and the intermediate bottom plate using the water in the bathtub as a buoyancy adjusting medium is connected to the intermediate bottom plate at the top and the weight portion at the bottom. The support leg that expands and contracts passively is equipped with a check valve and pressure release means.When expanding, the check valve passively absorbs hot and cold water from the bathtub, and the pressure release means passively drains and contracts the hot water. However, when the pressure release means does not operate, the support leg is closed so that the hot and cold water is retained, and the support portion including the weight portion is provided. The 29th feature is, in a bathtub pedestal including an intermediate bottom plate and a support portion, an intermediate bottom plate that includes a floating body and buoyancy adjusting means, and uses hot and cold water in the bathtub as a buoyancy adjusting medium, an intermediate bottom plate at the top, and a weight portion at the bottom. It is equipped with a non-return valve and pressure release means on the support leg of a container shape that is passively expanded and contracted by connecting to, and passively absorbs the hot and cold water of the bathtub from the check valve at the time of extension, and the hot water is passively passed by the pressure release means. It is configured to include a support leg that is drained and contracted, and is closed when the pressure releasing means is not activated to retain the hot water, and a support portion that includes a weight portion. A thirtieth feature is, in a bathtub mount provided with an intermediate bottom plate and a support portion, an intermediate bottom plate that includes a floating body and buoyancy adjusting means, and uses hot and cold water in the bathtub as a buoyancy adjusting medium, an intermediate bottom plate at the top, and a weight portion at the bottom. With a bellows-shaped support leg that is passively expanded and contracted by connecting to, a check valve,
Equipped with pressure release means, passively absorbs hot and cold water from the check valve during expansion, passively drains and contracts the hot and cold water by the pressure release means, and closes when pressure release means does not operate. It is configured to include a support leg that is allowed to stay and a support portion that includes a weight portion. The 31st feature is
A bathtub pedestal including an intermediate bottom plate and a support unit is configured to include an intermediate bottom plate and a support unit including support legs that are contracted passively and extended by self-power, and that extend and contract in the height direction.

[0010]

[Operation] The present invention has two basic elements. The first is an intermediate bottom plate and the second is a support. The intermediate bottom plate not only functions as an original bottom plate that supports the weight of bathers and maintains the depth of hot and cold water, but also floats by its own buoyancy and extends the supporting legs of the support section when there is no load such as bathers. There is a function to automatically change the depth of hot water. The buoyancy can be adjusted depending on the purpose of use, and when an intermediate bottom plate without buoyancy is used, the depth of hot and cold water is maintained as it is even when there is no load such as a bather. Further, the intermediate bottom plate can be reset to a desired depth if necessary. The support legs of the support part expand and contract in conjunction with the ups and downs of the intermediate bottom plate according to the height from the bottom of the bathtub to the intermediate bottom plate, suck the hot and cold water of the bathtub into the support legs when it is extended, or drain this hot and cold water. The height can be freely set by the structure that shrinks. When the hot water is retained without draining, the support legs act as a water pressure column and receive the load received from the intermediate bottom plate.
It can be stably supported at any depth of hot water.

[0011]

EXAMPLE FIG. 1 is a sectional view showing a usage state of the example. No. 1 is a bathtub in which hot water maintains a predetermined water level. Reference numeral 2 denotes an intermediate plate, which constitutes an intermediate bottom plate integrally with the floating body of 3 and is a structure having sufficient rigidity against a load. Reference numeral 4 denotes a buoyancy adjusting plug provided on the side surface of the floating body 3, and the buoyancy of the floating body 3 is
The weight is set smaller than the weight of the bather when the bathtub is used, and the intermediate bottom plate can be floated to extend the support legs 5. When the buoyancy adjusting plug 4 is opened, the buoyancy of the floating body 3 disappears. 5 is a support leg, the top part is an intermediate bottom plate, and the bottom part is a weight part 6
It is connected to. In this embodiment, four support legs 5 are provided. 101 is a check valve. 7 is a flexible thin tube, 8
Is a release button, and 9 is a reinforcing portion.

FIG. 2 shows the embodiment taken out of the bath,
Alternatively, it is a cross-sectional view showing another usage state, in which the support leg 5 is contracted. The reference numerals of the respective parts are the same as those in FIG.

Here, an actual usage state will be illustrated. First, buoyancy is applied to the intermediate bottom plate, which is effective when an infant, a physically handicapped person, or the like depends on a caregiver to take a bath. As shown in FIG. 1, the bathtub mount of the embodiment is placed in the bathtub. Since there is no load on the intermediate bottom plate composed of the intermediate plate 2 and the floating body 3, the intermediate bottom plate floats up to the surface of hot water due to buoyancy. At this time, since the support leg 5 receives the buoyancy of the intermediate bottom plate at the top and is fixed to the weight portion 6 at the bottom, the support leg 5 receives the extension force to increase the volume. Therefore, the pressure inside the support leg 5 decreases from the outside, the check valve 101 opens, and the support leg 5 extends while sucking the hot water from the outside and stands still at a height corresponding to the surface of the hot water. Here, when a caregiver places a bather such as an infant or a physically handicapped person on the intermediate bottom plate on the surface of hot water, the load is greater than the buoyancy of the floating body 3 as described above, and the force to contract the support legs 5 Become. That is, the pressure inside the support leg 5 rises from the outside and the check valve 101 is closed to prevent the hot water from entering and exiting. In other words, bathers such as infants are kept in the air above the surface of the hot water. Next, when the caregiver or the like presses the release button 8, the internal pressure of the thin tube 7 and the support leg 5 is released, the support leg 5 contracts, and the intermediate bottom plate also sinks into the hot water. When the caregiver or the like stops pressing the release button 8 at an appropriate depth of hot water, the internal pressure of the support leg 5 immediately recovers, the contraction of the support leg 5 stops, and the intermediate bottom plate is held at that position. . In other words, bathers such as infants bathe in hot water. When a caregiver or the like lifts a bather such as an infant in hot water as necessary, the load on the intermediate bottom plate is removed, and the buoyancy of the floating body 3 allows the intermediate bottom plate to be shallow according to its lifting height. Since the act of lifting a bather in hot water can take advantage of the buoyancy of the bather himself, the burden on the caregiver is remarkably reduced, and in combination with the operation of the release button 8, the depth of hot water can be changed arbitrarily and frequently. You can easily achieve a comfortable bathing condition. At the end of bathing, the caregiver can temporarily take a rest just below the surface of the water where the buoyancy of the bather can be used, and the caregiver can reconstruct his or her posture to cope with the burden. Here, another embodiment will be described. In the above example, buoyancy is applied to the intermediate bottom plate, but the extension leg force corresponding to this buoyancy can also be applied to the support leg 5 to function similarly. That is, the bellows shape of the support leg 5 shown in FIG. 1 is manufactured in a shape that is stretched to the maximum so that the springiness of the material itself provides an extension force equivalent to the above buoyancy, or the bellows shape of the support leg 5 is added. By a spring (not shown). In this embodiment, the weight of the supporting leg 5 is always present, so that the weight 6 can be omitted, but it is not suitable for the usage described in the next section.

Next is a case where buoyancy is not applied to the intermediate bottom plate. In FIG. 1, when the buoyancy adjusting plug 4 is opened, the air inside the floating body 3 is exhausted and filled with hot water, and the buoyancy of the floating body 3 disappears. In this state, the weight of the intermediate bottom plate in hot and
As a result, the pressure inside the support leg 5 rises from the outside, the check valve 101 closes, and the entry and exit of hot water is blocked.
That is, the intermediate bottom plate stands still in the hot and cold water regardless of the presence or absence of the load on the intermediate bottom plate. Usually, this method of use is convenient for a bather who does not depend on a caregiver or the like. That is, if the bather pulls up the intermediate bottom plate in hot water as needed before entering the bathtub, the weight of the intermediate bottom plate in hot water disappears, and the support legs 5 are extended through the above-mentioned process, depending on the height. The middle bottom plate can be shallow. When a bather enters the bathtub and presses the release button 8 on the intermediate bottom plate as necessary, the internal pressures of the thin tube 7 and the supporting leg 5 are released through the above process, and the supporting leg 5 contracts to contract the intermediate bottom plate. Will sink. In this way, a comfortable bathing state can be easily realized such that the appropriate depth of hot and cold water is arbitrarily and frequently changed and adjusted according to the posture of a child, an adult, or a bather.

The release button 8 is provided for each support leg 5. Therefore, the intermediate bottom plate can be tilted with respect to a desired posture such as a bather lying down in the bathtub. That is, when the release button 8 of the corresponding portion is selectively operated, the support leg 5 contracts more than other portions, and the intermediate bottom plate tilts. To return the intermediate bottom plate to the normal horizontal position,
All the release buttons 8 may be continuously pressed to temporarily set the intermediate bottom plate to the deepest portion as shown in FIG. 2, or the intermediate bottom plate may be pulled up to the hot and cold surface. The number of legs of the support legs 5 is not limited to four, and if the number of legs is one or more, a stable support portion can be formed in view of the area of the intermediate bottom plate and the thickness of one of the support legs 5. good.

In the above description, an example of use in which the buoyancy adjusting plug 4 is opened and the buoyancy of the floating body 3 has disappeared has been described. However, the buoyancy adjusting plug 4 is opened and the air inside the floating body 3 is exhausted. By closing the buoyancy adjusting plug 4 on the way, the buoyancy of the floating body 3 can be made to remain appropriately. In the case of being composed of a plurality of floating bodies 3, various usage forms can be obtained by appropriately combining the states in which arbitrary buoyancy remains.

Details of each part will be described below with reference to FIGS. 3 is an external view showing the entire intermediate bottom plate, and the reference numerals of the respective parts are the same as those in FIG. The intermediate plate 2 and the floating body 3 are molded from plastic such as polypropylene, but the necessary rigidity such as a rib structure is given to important points so as to withstand the load from above and below when a bather's weight is used. As a structure that gives the same rigidity to the assembly of the intermediate plate 2 and the floating body 3, for example, they are integrated by a fitting structure or a welding method. Proper through holes are provided at important points of the intermediate plate 2 to create a free flow of hot water and prevent slipping of a bather. Furthermore, this through hole serves as a handle when changing the depth of the hot water.

The floating body 3 is in the shape of a container molded from plastic such as polypropylene as described above, and the buoyancy adjusting plug 4 on the side surface is a screw stopper, and when tightened, the opening of the floating body 3 is opened through a packing (not shown). Close the part. When the buoyancy adjusting plug 4 is closed in the air, the airtightness inside the floating body 3 is maintained and the buoyancy is obtained by the hot and cold water in the bathtub. The magnitude of this buoyancy is larger than the value obtained by adding the total specific gravity of the intermediate bottom plate and the part of the entire support part excluding the weight part 6 and the resistance force when the support leg 5 is extended, and the buoyancy is well balanced. The container shape, volume, and number of floating bodies 3 are determinants. That is, in this embodiment, one pair of floating bodies 3 are provided with the intermediate plate 2 sandwiched therebetween, but one pair is not a functionally necessary condition, and one or more floating bodies 3 can be arranged at appropriate places. Further, if the buoyancy adjusting plug 4 is placed in hot and cold water in the bathtub with the plug open, buoyancy is not generated by pumping hot and cold water into the floating body 3. Here, another embodiment limited to the case where the usage is buoyant will be shown. In the above example, the floating body 3 is provided on the intermediate bottom plate. However, even if the supporting leg 5 is provided with an extension force corresponding to this floating force, the same function is achieved. That is, the bellows shape of the support leg 5 shown in FIG. 1 is manufactured in the maximum stretched shape so that the spring force of the material itself provides an extension force equivalent to the above buoyancy, or the bellows shape of the support leg 5 is added. By a spring (not shown). In this method, the weight 6 can be omitted because the support leg 5 always has an extension force.

FIG. 4 is a sectional view showing the structure of the main part, and the reference numerals of the respective parts are the same as those in FIG. On the lower surface of the floating body 3, there are two flanges on the right side and the left side in the width direction, which are connected to the tops of the four support legs 5 by a pin structure. This connection has a sufficient supporting force with respect to the load in the vertical direction, and has a structure that allows the connection between the floating body 3 and the support leg 5 to tilt. The supporting leg 5 is formed in a columnar shape as a whole with a valve chamber just below the top flange and is made of plastic such as vinyl chloride. In the valve chamber, there is a check valve 101 and a connection port for a flexible soft vinyl chloride tube to the thin tube 7. At this connection port, a retaining metal fitting or the like is appropriately used so that the thin tube 7 does not come off due to the internal pressure. The lower part of the valve chamber forms a cylindrical container with a closed bottom, and has a bellows shape so that it can expand and contract in the height direction of the cylinder. Below the bottom of the support leg 5 is a weight portion 6. The weight portion 6 has a horizontal cross-section that is substantially the same as that of the support leg 5, and is formed by filling a casing molded of plastic such as vinyl chloride with a metal having a sufficiently large specific gravity such as stainless steel and lead. It is necessary that the weight 6 has a heavy weight so that the weight of the weight 6 is not controlled by the resistance of the support leg 5 when the weight is extended. Support leg 5
The bottom portion and the weight portion 6 are integrated by, for example, a fitting structure or a welding method.

The reinforcing portion 9 is made of rod-shaped hard vinyl chloride or the like, and extends radially from the central portion to maintain a constant interval between the weight portions 6. The reinforcing portion 9 and the weight portion 6 have a sufficient proof strength against the displacement force that acts in the horizontal direction and have a structure that allows the inclination, and the embodiment in which the flanges are connected by pins is illustrated. Further, in addition to maintaining the space between the weight portions 6, the reinforcing portion 9 is provided in a required number of intermediate portions so as not to break the supporting leg 5 even when the supporting leg 5 is maximally stretched and is the weakest against bending force. Set up. Also in this case, it is sufficient that the structure has sufficient proof strength for the force acting in the horizontal direction and allows the inclination, and the reinforcing band 19 and the flange of the rod-shaped portion of the reinforcing portion 9 using a band plate of vinyl chloride or the like in a ring shape. An example is shown in which is connected by a pin. Further, as described above, in some cases, such as when the strength of the supporting leg 5 itself is sufficient, or when the supporting leg 5 is one, it is not necessary to provide the reinforcing portion 9.

Next, the check valve 101 will be described in an enlarged manner with reference to the partial sectional view of FIG. The reference numerals of the respective parts in FIG. 5 are the same as those in FIG.
The check valve 101 is a stainless steel flat plate and freely rotates on a vertical plane about the upper fulcrum 11. On the side of the check valve 101 facing the opening of the valve chamber, a neoprene rubber plate is attached as a packing material, and seals the valve chamber when the pressure in the valve chamber, that is, the pressure inside the support leg 5 becomes higher than the outside. . Further, when the pressure outside the valve chamber becomes higher than the pressure inside the valve chamber, the check valve 101 rotates accordingly and the seal of the valve chamber is released.

FIG. 6 is a sectional view showing the structure of the release button 8. The release button 8 is provided for each valve chamber, that is, for each support leg 5. In FIG. 6, 7 is a thin tube of a soft vinyl chloride tube. 12 is a release button case and 8 is a release button, both of which are molded from plastic such as polypropylene. 13 is a drain hole, and 14 is a stainless steel spring. Ten
Numeral 2 is a valve made of a stainless steel plate, and a neoprene rubber plate is attached to the upper surface as a packing material. Valve 102 is spring 1
Since it is pressed against the opening of the case 12 by 4, the pressure inside the thin tube 7, that is, the pressure inside the support leg 5, is always maintained.

Now, when the release button 8 is pressed against the spring 14, the valve 102 descends to form a gap with the opening of the case 12. In this way, the internal pressure on the thin tube 7 side is released to the outside through the drain hole 13 from this gap. When the release button 8 is stopped from being pressed, the valve 102 is pressed against the opening of the case 12 by the spring 14, so that the internal pressure on the thin tube 7 side, that is, the internal pressure of the support leg 5 is held again.

As described above, the release button 8 is the thin tube 7.
The pressure inside the side, that is, the pressure inside the support leg 5, is released,
There are other embodiments (not shown) for this purpose. In FIG. 5, the check valve 101 seals the valve chamber when the pressure of the valve chamber, that is, the pressure inside the support leg 5 becomes higher than the outside, but at this time, the check valve 101 is pushed directly from the outside of the valve chamber toward the inside. However, the pressure inside the support leg 5 can be released. In this case, the thin tube 7 and the release button 8 are unnecessary, and for example, a push rod is arranged at a position facing the check valve 101 and mechanically operated by a link mechanism.

[0025]

The advantages of the first and second aspects of the present invention are that the intermediate base plate, the support legs that passively expand and contract, and the support portion having the weight portion are provided, and the bath mount is constructed with a simple structure. That is what I did. The effect of the invention according to claim 3 is that the pedestal for a bathtub is configured with a simple structure by including the intermediate bottom plate, the support leg that passively expands and contracts using the hot water of the bathtub as the working medium, and the support portion that has the weight portion. That is. The effect according to the invention of claim 4 is that the intermediate bottom plate, the check valve and the pressure releasing means are provided, and the supporting leg that passively expands and contracts using the hot water of the bath as a working medium, and the supporting portion that has the weight portion are provided. That is, the bathtub mount is constructed with a simple structure. The effect of the invention of claim 5 is
It has an intermediate bottom plate, a container-shaped support leg, a check valve and pressure release means, and a support leg that expands and contracts passively using hot and cold water in the bathtub as a working medium, and a support portion that has a weight portion. That is, the bathtub stand was constructed with a simple structure. According to the invention of claim 6, an intermediate bottom plate, a bellows-shaped support leg having a container shape, a check valve and a pressure release means, and a support leg that expands and contracts passively using hot and cold water of a bath as a working medium. The bath pedestal is configured with a simple structure by including the support portion including the weight portion.

The effects of the inventions of claims 7 and 8 are as follows:
An intermediate bottom plate that has buoyancy more than its own weight against the water in the bathtub,
The bath pedestal is configured with a simple structure, which includes the support legs that extend and retract passively and the support portion including the weight portion. The effect according to the invention of claim 9 is that the intermediate bottom plate having a buoyancy force against the hot and cold water of the bathtub is more than its own weight, the support leg that is passively expanded and contracted using the hot and cold water of the bathtub as a working medium, and the support portion having the weight portion. That is, the bathtub mount is constructed with a simple structure.
According to the invention of claim 10, an intermediate bottom plate having a buoyancy force greater than its own weight with respect to the hot and cold water of the bathtub, a check valve and a pressure release means, and the supporting legs that extend and retract passively using the hot and cold water of the bathtub as a working medium. And the supporting part having the weight part is provided to constitute the bathtub stand with a simple structure. The effect according to the invention of claim 11 is that the intermediate bottom plate having a buoyancy more than its own weight with respect to the hot and cold water of the bathtub, the container-shaped support leg, and the check valve and the pressure releasing means are provided, and the hot and cold water of the bathtub is used as a working medium. That is, the bath pedestal is configured with a simple structure by including the passively extending and contracting supporting legs and the supporting portion having the weight portion. The effect of the invention of claim 12 is that the intermediate bottom plate having a buoyancy force more than its own weight against the hot and cold water of the bathtub, and the bellows-shaped container-shaped support leg,
By providing a check valve and pressure release means, passively extending and contracting support legs using hot water in the bathtub as a working medium, and a support part having a weight part, the bathtub stand is configured with a simple structure. is there.

According to the thirteenth and fourteenth aspects of the present invention, an intermediate bottom plate having a floating body, passively extending and contracting support legs, and a supporting portion having a weight portion are provided, and a bathtub stand having a simple structure is provided. Is that it is configured. According to the effect of the invention of claim 15, the intermediate bottom plate provided with the floating body, the support leg that passively expands and contracts using the hot water of the bathtub as a working medium, and the support part provided with the weight portion are provided for the bathtub with a simple structure. That is the construction of the gantry. According to the sixteenth aspect of the invention, an intermediate bottom plate having a floating body, a check valve and a pressure releasing means are provided, and support legs that extend and retract passively using hot and cold water of a bathtub as a working medium and a weight portion are supported. That is, the bathtub pedestal is configured with a simple structure by including the section. The effect of the invention according to claim 17 is that an intermediate bottom plate provided with a floating body, a container-shaped support leg that is passively expanded and contracted by being connected to the intermediate bottom plate at the top and a weight at the bottom, and a check valve,
Equipped with pressure release means, passively absorbs hot and cold water from the check valve during expansion, passively drains and contracts the hot and cold water by the pressure release means, and closes when pressure release means does not operate. The bath pedestal is configured with a simple structure by including the supporting legs that are retained and the supporting portion that includes the weight portion. According to the invention of claim 18, an intermediate bottom plate having a floating body, a bellows-shaped support leg having a container shape, a check valve and a pressure release means are provided to passively expand and contract using hot and cold water of a bath as a working medium. The bath pedestal is configured with a simple structure by including the support legs and the support portion including the weight portion.

The effects of the nineteenth and twentieth aspects of the present invention include a simple structure including an intermediate bottom plate having a floating body and buoyancy adjusting means, passively extending and contracting support legs, and a supporting portion having a weight portion. That is, the bathtub stand was constructed with. Claim 21
Advantageous Effects of Invention According to the invention, the bathtub has a simple structure including an intermediate bottom plate having a floating body and buoyancy adjusting means, passively extending and contracting support legs using hot water in a bathtub as a working medium, and a support portion having a weight portion. This is the construction of the mount. The effect of the invention of claim 22 is that an intermediate bottom plate provided with a floating body and buoyancy adjusting means;
By providing a check valve and pressure release means, passively extending and contracting support legs using hot water in the bathtub as a working medium, and a support part having a weight part, the bathtub stand is configured with a simple structure. is there. The effect of the invention of claim 23 is that the intermediate bottom plate provided with the floating body and the buoyancy adjusting means, the container-shaped support leg, the check valve and the pressure release means are provided to passively expand and contract using hot water in the bathtub as a working medium. The bath pedestal is configured with a simple structure by including the supporting legs and the supporting portion including the weight portion. According to the invention of claim 24, the intermediate bottom plate provided with the floating body and the buoyancy adjusting means, the bellows-shaped container-shaped supporting leg, the check valve and the pressure releasing means are provided, and the hot and cold water in the bathtub is used as the working medium. The bath pedestal is configured with a simple structure, which includes the support legs that extend and retract passively and the support portion including the weight portion.

According to the twenty-fifth and twenty-sixth aspects of the present invention, a floating body and a buoyancy adjusting means are provided, and an intermediate bottom plate using hot and cold water in a bathtub as a buoyancy adjusting medium, passively extending and contracting support legs, and a weight portion are provided. That is, the bathtub pedestal is configured with a simple structure by including the supporting portion. The effect according to the invention of claim 27 is that the intermediate bottom plate is provided with a floating body and buoyancy adjusting means and uses hot and cold water in the bathtub as a buoyancy adjusting medium, passively extending and retracting support legs that use hot and cold water in the bathtub as a working medium, and a weight portion. The bath pedestal is configured with a simple structure by including the supporting portion. According to the invention of claim 28, an intermediate bottom plate having a floating body and buoyancy adjusting means and using hot and cold water in a bathtub as a buoyancy adjusting medium, and a check valve and pressure releasing means and using hot and cold water in a bathtub as a working medium. The bath pedestal is configured with a simple structure, which includes the support legs that extend and retract passively and the support portion including the weight portion. The effect according to the invention of claim 29 is that the bath is provided with a floating body and a buoyancy adjusting means, an intermediate bottom plate using hot water in the bathtub as a buoyancy adjusting medium, a container-shaped support leg, a check valve and a pressure releasing means. That is, the bath pedestal is configured with a simple structure, which includes the support legs that use the hot and cold water as a working medium and that extend and contract passively, and the support portion that includes the weight portion. The effect of the invention according to claim 30 is that it is provided with a floating body and buoyancy adjusting means, an intermediate bottom plate using hot and cold water of a bathtub as a buoyancy adjusting medium, a bellows-shaped container-shaped supporting leg, a check valve and a pressure releasing means. Thus, the bath pedestal is configured with a simple structure, which is provided with the support leg that uses the hot and cold water of the bath tub as a working medium and that extends and contracts passively, and the support portion that has the weight portion. The effect of the invention of claim 31 is that the bath pedestal is configured with a simple structure by including the intermediate bottom plate and the support portion including the support leg that contracts passively and expands by itself and expands and contracts in the height direction. Is.

[Brief description of drawings]

FIG. 1 is a sectional view showing a usage state of an embodiment.

FIG. 2 is a cross-sectional view showing another usage state.

[Figure 3] is an external view of the part

FIG. 4 is a sectional view of a part

FIG. 5 is a sectional view of a part

FIG. 6 is a sectional view of part

[Explanation of symbols]

1 is a bathtub, 2 is an intermediate plate, 3 is a floating body, 4 is a buoyancy adjustment stopper, 5
Is a support leg, 6 is a weight portion, 7 is a thin tube, 8 is a release button, 9
Is a reinforcing portion, 11 is a fulcrum, 12 is a case, 13 is a drain hole, 14 is a spring, 19 is a band, 101 is a check valve, and 102 is a valve.

Claims (31)

[Claims] 1. A pedestal for a bathtub comprising an intermediate bottom plate, support legs that are passively stretchable in the height direction, and a support portion having a weight portion. 2. A bathtub mount comprising an intermediate bottom plate, a support leg that is connected to a middle bottom plate at the top and a weight part at the bottom and is capable of passively expanding and contracting, and a support part having a weight part. 3. An intermediate bottom plate and a support leg which is connected to a middle bottom plate at the top and a weight part at the bottom so as to be able to passively expand and contract, passively absorbs the hot and cold water of the bathtub during extension, and the hot and cold water during contraction. A pedestal for a bathtub, which includes a support leg that passively drains water and retains the hot and cold water when it does not expand or contract, and a support portion that includes a weight portion. 4. A non-return valve and a pressure release means are provided on an intermediate bottom plate, a support leg which is connected to a middle bottom plate at the top part and a weight part at the bottom part, and which extends and contracts passively, and is provided with a check valve and a pressure release means. Support legs that have a weight and a support leg that passively absorbs hot water and drains the hot water passively by the pressure release means to shrink and block the hot water when the pressure release means does not operate to retain the hot water. A bath pedestal with a section. 5. A check valve and a pressure release means are provided on a support leg in the form of a container that is passively expanded and contracted by connecting an intermediate bottom plate and an intermediate bottom plate at the top and a weight part at the bottom, and a check valve when extended. The support leg that passively absorbs the hot and cold water of the bathtub from the bathtub, passively drains and contracts the hot and cold water by the pressure release means, and blocks the hot and cold water when the pressure release means does not operate, and the weight portion. A bath pedestal with a supporting part. 6. An intermediate bottom plate, a bellows-shaped container-shaped support leg that is passively expanded and contracted by being connected to an intermediate bottom plate at the top and a weight at the bottom, and provided with a check valve and pressure release means, and at the time of extension. A support leg that passively absorbs hot and cold water from the bathtub from the check valve, passively drains and contracts the hot and cold water by the pressure release means, and closes the hot water so that the hot water stays when the pressure release means does not operate. A stand for a bathtub, which includes a support portion including a weight portion. 7. A bathtub stand comprising an intermediate bottom plate having a buoyancy force equal to or more than its own weight against the hot water of the bathtub, support legs passively extending and contracting in the height direction, and a support portion having a weight portion. 8. An intermediate bottom plate having a buoyancy force higher than its own weight with respect to the hot water of the bathtub, a support leg which is connected to the intermediate bottom plate at the top and a weight part at the bottom to passively expand and contract, and a support part having a weight part. A bath cradle equipped with it. 9. An intermediate bottom plate having a buoyancy force higher than its own weight against the hot water of the bathtub, and a support leg which is connected to the intermediate bottom plate at the top and a weight part at the bottom so as to be passively expanded and contracted. A bathtub mount provided with support legs that passively absorb hot water, passively drain the hot water when contracted, and retain the hot water when neither expanded nor contracted, and a support portion having a weight portion. . 10. An intermediate bottom plate having a buoyancy force greater than its own weight with respect to the hot water of the bathtub, a support leg that is passively extended and contracted by connecting the intermediate bottom plate at the top and the weight at the bottom, a check valve, and a pressure release means. When the water is extended, the check valve passively absorbs the hot and cold water of the bathtub, and the pressure release means passively drains and contracts the hot and cold water.
A pedestal for a bathtub, which includes a support leg that is closed when the pressure releasing means is not operated and retains the hot water, and a support portion that includes a weight portion. 11. An intermediate bottom plate having a buoyancy force greater than its own weight with respect to the hot water of the bathtub, a support leg in the shape of a container that is passively expanded and contracted by connecting the intermediate bottom plate at the top and the weight at the bottom, and a check valve. Equipped with pressure release means, passively absorbs hot and cold water from the check valve during expansion, passively drains and contracts the hot and cold water by the pressure release means, and closes when pressure release means does not operate. A bath pedestal including support legs that are retained and a support portion that includes a weight portion. 12. An intermediate bottom plate having a buoyancy force more than its own weight against hot and cold water in a bathtub, and a bellows-shaped container-shaped supporting leg which is passively expanded and contracted by being connected to an intermediate bottom plate at the top and a weight part at the bottom, and is non-returned. Equipped with a valve and pressure release means, passively absorbs hot and cold water from the check valve during expansion, passively drains and contracts the hot water from the check valve, and closes when pressure release means does not operate A pedestal for a bathtub, which is provided with a support leg that retains the hot water and a support portion that has a weight portion. 13. A base for a bathtub comprising an intermediate bottom plate having a floating body, support legs passively extending and contracting in the height direction, and a support portion having a weight portion. 14. An intermediate bottom plate provided with a floating body, and a support leg that is passively expanded and contracted by connecting the intermediate bottom plate at the top and the weight part at the bottom.
A stand for a bathtub, which includes a support portion including a weight portion. 15. An intermediate bottom plate provided with a floating body, and a support leg that is connected to a middle bottom plate at the top and a weight part at the bottom so as to extend and contract passively, passively absorbs hot water in the bathtub during extension, and contracts. At the time of, a bathtub stand comprising: a support leg that passively drains the hot and cold water and retains the hot and cold water when there is no expansion or contraction; and a support portion having a weight portion. 16. An intermediate bottom plate having a floating body, and a support leg that is passively telescopically connected to the intermediate bottom plate at the top and the weight portion at the bottom,
Equipped with a check valve and pressure release means, passively absorbs hot and cold water from the check valve during expansion, passively drains and contracts the hot water from the check valve, and closes when pressure release means does not operate A pedestal for a bathtub, which is provided with a support leg that retains the hot and cold water and a support portion that has a weight portion. 17. An intermediate bottom plate provided with a floating body, a container-shaped supporting leg which is passively expanded and contracted by being connected to an intermediate bottom plate at the top and a weight part at the bottom, and a check valve and a pressure releasing means, which are provided for extension. When the hot water in the bathtub is passively absorbed from the check valve, the hot water is passively drained and contracted by the pressure release means, and when the pressure release means does not operate, the hot water is retained and the supporting legs are retained. , A bathtub stand having a support portion having a weight portion. 18. An intermediate bottom plate having a floating body, a bellows type container-shaped supporting leg that is passively expanded and contracted by being connected to an intermediate bottom plate at the top and a weight part at the bottom, a check valve, and a pressure release means. , When extending, it passively absorbs hot and cold water from the check valve,
The hot water is passively drained and contracted by the pressure releasing means, and when the pressure releasing means does not operate, the supporting leg is closed so that the hot water stays, and a supporting portion having a weight portion is provided.
Stand for bathtub. 19. A bath cradle comprising an intermediate bottom plate having a floating body and buoyancy adjusting means, passively extending and contracting supporting legs, and a supporting portion having a weight portion. 20. A bathtub comprising an intermediate bottom plate having a floating body and buoyancy adjusting means, a support leg for passively expanding and contracting by connecting the intermediate bottom plate at the top and a weight part at the bottom, and a support part having a weight part. Mount. 21. An intermediate bottom plate having a floating body and buoyancy adjusting means, and a support leg which is connected to a middle bottom plate at the top and a weight part at the bottom so as to extend and contract passively. A bath cradle having support legs that absorb water and passively drain hot water when contracting, and retain the hot water when there is neither expansion nor contraction, and a support portion having a weight portion. 22. An intermediate bottom plate having a floating body and buoyancy adjusting means, a support leg that is passively telescopically connected to the intermediate bottom plate at the top and a weight portion at the bottom, is provided with a check valve and pressure releasing means, and extends. At this time, the support leg passively absorbs the hot and cold water from the check valve through the check valve, passively drains and contracts the hot and cold water by the pressure releasing means, and closes the hot water so that the hot and cold water stays when the pressure releasing means does not operate. And a pedestal for a bathtub, which includes a support portion including a weight portion. 23. An intermediate bottom plate provided with a floating body and buoyancy adjusting means, a container-shaped supporting leg that is passively telescopically connected to the intermediate bottom plate at the top and a weight portion at the bottom, and a check valve and pressure releasing means. Provided, when the water is extended, it passively absorbs the hot and cold water of the bathtub from the check valve, and the hot water is passively drained and contracted by the pressure release means,
A pedestal for a bathtub, which includes a support leg that is closed when the pressure releasing means is not operated and retains the hot water, and a support portion that includes a weight portion. 24. An intermediate bottom plate having a floating body and buoyancy adjusting means; a bellows-shaped support leg that is passively expanded and contracted by connecting the intermediate bottom plate at the top and the weight part at the bottom, a check valve, and a pressure. Equipped with an opening means, passively absorbs hot and cold water from the check valve at the time of extension, passively drains and contracts the hot and cold water by the pressure releasing means, and closes when the pressure releasing means does not operate and the hot and cold water stays. A pedestal for a bathtub, which includes a supporting leg that is configured to do so and a supporting portion that includes a weight portion. 25. An intermediate bottom plate having a floating body and buoyancy adjusting means and using hot and cold water in a bathtub as a buoyancy adjusting medium, support legs that passively expand and contract in the height direction, and a support portion having a weight portion, Stand for bathtub. 26. An intermediate bottom plate comprising a floating body and a buoyancy adjusting means and using hot and cold water of a bathtub as a buoyancy adjusting medium; a support leg which is connected to the intermediate bottom plate at the top and a weight part at the bottom to extend and contract passively; and a weight part. A stand for a bathtub, which has a support portion provided with. 27. An intermediate bottom plate provided with a floating body and buoyancy adjusting means, using hot and cold water in a bathtub as a buoyancy adjusting medium, and a support leg which is connected to a middle bottom plate at the top and a weight part at the bottom so as to extend and contract passively. , Support legs that passively absorb the hot and cold water of the bathtub during extension, passively drain the hot and cold water during contraction, and retain the hot and cold water when there is neither extension nor contraction, and a support part with a weight part. A bath cradle equipped with it. 28. A non-return check is provided on an intermediate bottom plate, which comprises a floating body and buoyancy adjusting means and uses hot and cold water in a bathtub as a buoyancy adjusting medium, and a support leg which is connected to an intermediate bottom plate at the top and a weight portion at the bottom to passively expand and contract. Equipped with a valve and pressure release means, passively absorbs hot and cold water from the check valve during expansion, passively drains and contracts the hot water from the check valve, and closes when pressure release means does not operate A pedestal for a bathtub, which is provided with a support leg that retains the hot water and a support portion that has a weight portion. 29. An intermediate bottom plate provided with a floating body and buoyancy adjusting means and using hot and cold water of a bathtub as a buoyancy adjusting medium, and a container-shaped supporting leg that is connected to an intermediate bottom plate at the top and a weight part at the bottom to passively expand and contract. , Equipped with a check valve and pressure release means, passively absorbs hot and cold water from the check valve at the time of extension, and the pressure release means passively drains and contracts the hot and cold water, and the pressure release means does not operate A bath rack including a support leg that is closed to allow the hot water to stay therein and a support portion that includes a weight portion. 30. An intermediate bottom plate, comprising a floating body and buoyancy adjusting means and using hot and cold water in a bathtub as a buoyancy adjusting medium, and a bellows-shaped container shape that is passively expanded and contracted by connecting the intermediate bottom plate at the top and the weight part at the bottom. The support leg is equipped with a check valve and pressure release means, passively absorbs the hot and cold water of the bathtub from the check valve at the time of extension, the pressure release means passively drains and contracts the hot and cold water, and the pressure release means A bath pedestal including a support leg that is closed when not operating to retain the hot water and a support portion that includes a weight portion. 31. A bath pedestal provided with an intermediate bottom plate and a support portion having support legs that are passively contracted and self-expanded and extend and contract in the height direction.