JP2556457B2 - Wood bathtub - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wooden bathtub, and more particularly to a wooden bathtub formed of a wooden material.

[0002]

2. Description of the Related Art Conventionally, there is known a wooden bathtub in which hot water is stored and a person can enter therein.

[0003]

In this type of wooden bathtub, hot water is stored when it is used and dried when it is not used. Therefore, in the wooden bathtub, the water content of the wooden material changes drastically. In general, a wood material has a property that its size expands when the water content increases, and it shrinks when the water content decreases.

Therefore, there is a problem in that the wooden bathtub used in a place where the surrounding humidity conditions change drastically expands and contracts in size. Therefore, the wooden bathtub may be distorted.

Therefore, as disclosed in Japanese Patent Laid-Open No. 4-92618, there is disclosed a wooden bathtub in which the side wall and the bottom plate are impregnated with a dimension stabilizing resin to reduce the expansion and contraction of the dimension due to changes in ambient humidity conditions. .

However, in the wooden bath disclosed in Japanese Patent Laid-Open No. 4-92618, it is necessary to use laminated wood for the entire side wall and the bottom plate in order to impregnate the side wall and the bottom plate with the dimension stabilizing resin. . Furthermore, in this wooden bath, it is necessary to impregnate the entire side wall and the entire bottom plate with the dimension stabilizing resin. Therefore, in this wooden bathtub, although the expansion and contraction of dimensions due to changes in ambient humidity conditions are small, the manufacturing cost thereof is high.

Therefore, a main object of the present invention is to provide a wooden bathtub which is small in size expansion and contraction due to changes in ambient humidity conditions and can be manufactured at a relatively low cost.

[0008]

According to the present invention, a hollow side wall formed by joining adjacent end faces of a plurality of unit materials and a step formed on the inner wall at one end in the length direction of the side wall. A wooden bathtub including a portion and a bottom plate whose end edge is fitted into the step portion of the side wall and locked to the step portion,
The unit material includes an inner surface of the unit material formed of water-resistant wood and an outer surface of the unit material formed of laminated wood impregnated with a dimension stabilizing resin, and the inner surface of the side wall is formed by the inner surface of the unit material. The exposed surface of the side wall is a wooden bathtub formed by the outer surface of the unit material.

The bottom plate includes a bottom plate inner surface portion formed of water-resistant wood and a bottom plate outer surface portion made of laminated wood impregnated with a dimension stabilizing resin. The bottom plate inner surface is formed by the bottom plate inner surface portion. The exposed surface of the bottom plate formed is preferably formed by the bottom plate outer surface portion.

The wood forming the inner surface of the unit material and the inner surface of the bottom plate is preferably cedar.

[0011]

The dimension-stabilizing resin is impregnated into the outer surface of the unit material and the outer surface of the bottom plate, so that the dimension expansion and contraction due to changes in ambient humidity conditions is small. Furthermore, since the inner surface of the unit material and the inner surface of the bottom plate are not impregnated with the dimension stabilizing resin and are made of water resistant wood, the wood bath can be manufactured at a relatively low cost.

[0012]

According to the present invention, it is possible to obtain a wooden bathtub which is small in size expansion and contraction due to changes in ambient humidity conditions and can be manufactured at a relatively low cost.

The above-mentioned objects, other objects, features and advantages of the present invention will become more apparent from the following detailed description of the embodiments with reference to the drawings.

[0014]

1 is a perspective view showing an embodiment of the present invention, and FIG. 2 is a plan view thereof. FIG. 3 is a line III- in FIG.
FIG. 4 is a sectional view taken along line III-III in FIG. 4, and FIG.
It is sectional drawing in V. FIG.

The wood bath 10 includes a side wall 12 and a bottom plate 14 attached to the side wall 12. The bottom plate 14 has a step portion 16 formed on the inner wall of the side wall 12 so that the side wall 1
2 attached.

The side wall 12 includes a first unit material 18, a second unit material 20, a third unit material 22 and a fourth unit material 24. A convex portion 26 is formed on the end surface of the first unit material 18 on the side of the third unit material 22. Similarly, the convex portion 3 is formed on the end surface of the second unit material 20 on the side of the third unit material 22.
0 is formed. A concave portion 34 is formed on the end surface of the third unit material 22 on the first unit material 18 and second unit material 20 side.
Is formed, and the finger-shaped portion 36 is formed on the end surface on the fourth unit material 24 side. Further, the finger-shaped portion 3 is provided on the end surface of the fourth unit material 24 on the side of the third unit material 22.
8 are formed. The convex portions 26 and 30 are formed in a dovetail shape on the surfaces of the unit materials 18 and 20 in contact with the third unit material 22 so as to reach from one end of the unit materials 18 and 20 to the other end. Further, the recess 34 is formed in a dovetail shape on the surface where the third unit material 22 contacts the unit materials 18 and 20 so as to reach from one end to the other end of the third unit material 22. The side wall 12 is made of unit materials 18, 20, 22
And 24 are formed by combining the convex portions 26 and 30, the concave portion 34, and the finger-shaped portions 36 and 38 and adhering them with an adhesive.

As shown in FIG. 3, the first unit material 18 is
Thin plate-shaped first unit material inner surface portion 18 formed on the inner surface thereof
a and the first unit material outer surface portion 18b formed on the outer surface thereof
And The first unit material outer surface portion 18b is formed so as to entirely cover both side surfaces and the upper portion of the first unit material inner surface portion 18a in the thickness direction, that is, the exposed surface of the first unit material 18. . The first unit material outer surface portion 18b is formed by, for example, combining first unit material outer surface members 42a, 42b, 42c, 42d and 42e having the same thickness and the same length in the lateral direction in the lateral direction and in parallel.

On both side surfaces of the first unit material 18, first unit material outer surface members 42a and 42e are formed. That is, the first unit material outer surface members 42a and 42e are
First unit material inner surface portion 1 formed on the inner surface of the unit material 18 of
It is assembled so as to sandwich 8a. Further, first unit material outer surface members 42b, 42c and 42d are formed on the first unit material between the first unit material outer surface members 42a and 42e. Between the first unit material outer surface members 42a and 42e, the first unit material outer surface members 42b, 42 are provided.
c and 42d are sandwiched in this order. The first unit material outer surface members 42b, 42c, and 42d are located above the first unit material inner surface portion 18a, and the first unit material inner surface portion 18a.
The thickness of a is equal to the total thickness of the first unit material outer surface members 42b, 42c and 42d.

First unit material outer surface members 42a, 42b, 4
2c, 42d, and 42e are formed to have a length that extends from one end of the first unit material 18 in the longitudinal direction to the other end. further,
The first unit material outer surface members 42a and 42e are formed to have a length reaching from one end to the other end of the first unit material 18 in the width direction. First unit material outer surface members 42b, 42c and 42d
Are equal in length in the vertical direction and shorter than the lengths in the vertical direction of the first unit material outer surface members 42a and 42e. The lengths of the first unit material outer surface members 42a and 42e are the same as the lengths of the first unit material inner surface member 18a and the first unit material outer surface members 42b, 42c and 42d.
Equal to the length of and.

As shown in FIG. 4, the second unit material 20 is
A thin plate-shaped second unit material inner surface portion 20 formed on the inner surface thereof
a and the second unit material outer surface portion 20b formed on the outer surface thereof
And The second unit material outer surface portion 20b is formed so as to cover both side surfaces in the thickness direction of the second unit material inner surface portion 20a and the entire upper portion thereof.
And The second unit material outer surface member 20b is, for example, a second unit material outer surface member 44 having the same thickness and the same lateral length.
It is formed by combining a, 44b, 44c, 44d and 44e laterally and in parallel.

FIG. 5 is a perspective view showing the third unit material 22, and FIG. 6 is a sectional view taken along line VI-VI in FIG.
FIG. 7 is a sectional view taken along line VII-VII in FIG.
The third unit material 22 has a prismatic third unit material inner surface portion 22a formed on the inner surface thereof and a third unit material inner surface portion 22a formed on the outer surface thereof.
And the unit material outer surface portion 22b. The third unit material outer surface portion 22b is formed so as to cover the entire side surfaces and the upper portion of the third unit material inner surface portion 22a in the thickness direction. The third unit material outer surface member 22b includes, for example, third unit material outer surface members 46a, 46b, which have the same thickness and the same lateral length.
It is formed by combining 46c, 46d and 46e laterally and in parallel. Further, since the concave portion 34 and the finger-shaped portion 36 are formed in the third unit material 22, the concave portion 34 is formed in the third unit material inner surface portion 22a, and the third unit material inner surface portion 22a and Third unit material outer surface portion 22
A finger-shaped portion 36 is formed at b.

FIG. 8 is a perspective view showing the fourth unit material 24, and FIG. 9 is a sectional view taken along line IX-IX in FIG.
FIG. 10 is a sectional view taken along line XX in FIG. The fourth unit material 24 includes a prismatic fourth unit material inner surface portion 24a formed on the inner surface thereof and a fourth unit material outer surface portion 24b formed on the outer surface thereof. This fourth unit material outer surface portion 24
b is formed so as to cover both side surfaces in the thickness direction of the fourth unit material inner surface portion 24a and the entire upper portion. The fourth unit material outer surface portion 24b is, for example, a fourth unit material outer surface member 48a, 48b, 48 having the same thickness and the same lateral length.
It is formed by combining c, 48d and 48e laterally and in parallel. Further, since the finger-shaped portion 38 is formed in the fourth unit material 24, the fourth unit material inner surface portion 2 is formed.
Finger-shaped portions 38 are formed on the outer surface portion 4b of 4a and the fourth unit material.

The unit material inner surface portions 18a, 20a, 22a and 24a are formed of ordinary wood. As the wood forming the unit material inner surface portions 18a, 20a, 22a and 24a, water resistant and low cost wood is used, and for example, cedar is preferable. Unit material outer surface part 18
b, 20b, 22b, and 24b are made of, for example, a laminated wood material such as cypress and palm, and are impregnated with a dimension stabilizing resin by a method described later.

As described above, the unit material outer surface portions 18b, 20b, 22b and 24b impregnated with the dimension stabilizing resin are formed.
Are formed on the exposed surface of the sidewall 12, that is, on the outside, inside, and top of the sidewall 12. In addition, the inner surface of the side wall 12 has unit material inner surface portions 18a, 20a, 22a and 2
4a is formed. Therefore, when the wooden bathtub 10 is used, the unit material outer surface portions 18b, 2
0b, 22b, and 24b are formed, and the unit material inner surface portions 18a, 20a, 22a, and 24 are provided at locations where hot and cold water does not contact.
a will be formed.

Since the step portion 16 is formed on the inner wall of the side wall 12, the step portion 16 is formed at a certain position in the longitudinal direction of the unit materials 18, 20, 22 and 24. The step portion 16 is used to attach the bottom plate 14 to the side wall 12, and thus is oriented inward of the side wall 12. It should be noted that such a step portion 16 is previously formed in the unit material 1 as in this embodiment.
8, 20, 22 and 24 may be formed on the inner wall of the side wall 12 after the side wall 12 is formed by using a plurality of unit materials 18, 20, 22 and 24. Good.

The bottom plate 14 includes a bottom plate inner surface portion 14a formed on the inner surface thereof, and bottom plate outer surface portions 14b and 14c formed so as to cover the surface of the bottom plate inner surface portion 14a.
The bottom plate outer surface portions 14b and 14c are assembled so as to sandwich the bottom plate inner surface portion 14a. That is, the bottom plate outer surface portion 14b is formed below the bottom plate inner surface portion 14a, and the bottom plate outer surface portion 14c is formed above the bottom plate inner surface portion 14a. The bottom plate outer surface portions 14b and 14c and the bottom plate inner surface portion 14
a is formed in a substantially equal shape. The bottom plate outer surface portions 14b and 14c have substantially the same thickness, and the bottom plate inner surface portion 14
The thickness of a is larger than the thickness of the bottom plate outer surface portions 14b and 14c.

The inner surface 14a of the bottom plate is made of ordinary wood. The wood material forming the bottom plate inner surface portion 14a includes unit material inner surface portions 18a, 20a, 22a and 24a.
Like the wood forming the, wood that is water resistant and low cost is used, for example cedar is preferred. The bottom plate outer surface portions 14b and 14c are the unit material outer surface portions 18b, 20.
Like b, 22b, and 24b, it is made of a laminated wood material such as a cypress or a palm, and is impregnated with a dimension stabilizing resin by a method described later.

As described above, the bottom plate outer surface portions 14b and 14c impregnated with the dimension stabilizing resin are formed on the exposed surface of the bottom plate 14, that is, the upper and lower portions of the bottom plate 12. The bottom plate inner surface portion 14a is formed on the inner surface of the bottom plate.

On the outer periphery of the bottom plate 14, the step portion 1 of the side wall 12 is formed.
A second groove 52 having a quadrangular cross-section corresponding to the first groove 50 having a quadrangular cross-section provided in 6 is formed. In this embodiment, the first groove 50 and the second groove 52 are formed so as to have symmetrical shapes. Then, a drainage hole (not shown) for drainage is formed in principle at a suitable position slightly inward from the outer peripheral edge of the bottom plate 14.

The bottom of the step 16, that is, the side wall 1
A gap 54 is formed between the inner wall surface of No. 2 and the outer surface or outer peripheral surface of the bottom plate 14. And this gap 54
Then, the synthetic resin 56 is injected and filled. As the synthetic resin 56, a resin having excellent adhesiveness, water resistance, and heat resistance is preferable, and, for example, a silicone resin is used. Further, as the synthetic resin 56, it is preferable that the synthetic resin 56 is a liquid having a viscosity when injected and is elastic when cured. This is because the bottom plate 14 may expand or contract due to the water being absorbed by the bottom plate 14 or the water evaporating, and the expansion and contraction of the bottom plate 14 is not prevented by the synthetic resin 56. Then, when the injected synthetic resin 56 is cured, the side wall 12 and the bottom plate 14 are bonded to each other.

In this embodiment, as shown in FIG. 3 and the like, the case where the synthetic resin 56 is poured into the above-mentioned gap 54 from the bottom side of the side wall 12 is shown. this is,
This is because the bottom plate 14 is covered with the step portion 16 on the side wall 12 from below, and the synthetic resin 56 filled from below does not protrude to the upper part of the bottom plate 14. However, in some cases, it may be considered that the step portion 16 formed on the side wall 12 is turned upside down and the synthetic resin 56 is poured into the gap 54 from above.

When forming the arcuate portion of the side wall 12, as shown in FIG. 11, a hollow cylinder 58, which is an assembly of the fourth unit members 24 having the finger-shaped portions 38, is formed. Then, the hollow cylinder 58 is cut into a quarter to form an arc-shaped portion of the side wall 12.

As described above, the unit material outer surface portions 18b, 20
b, 22b and 24b and bottom plate outer surface portions 14b and 14
c is made of laminated wood such as Japanese cypress and Japanese pepper,
The dimension stabilizing resin is impregnated. Next, an example of a method of impregnating the wooden unit material outer surface portion 16b and the bottom plate outer surface portion 14b with the dimension stabilizing resin will be described.

Each unit material of the laminated material constituting the unit material outer surface portions 18b, 20b, 22b and 24b and the bottom plate outer surface portion 1
Each unit material of the laminated materials constituting 4b and 14c is put in a pressurizing and depressurizing injection can and depressurized to 30 mmHg or less for 1 hour. Thereafter, the dimensionally stabilized resin to which the catalyst solution has been added is introduced into the can.

A urea-formaldehyde-glyoxal precondensate is used as the dimension stabilizing resin. Its chemical structure is shown in Chemical formula 1.

[0036]

Embedded image

After the dimension stabilizing resin is introduced into the can, 1
The pressure is applied for 10 hours / kg ² and the injection is completed. After that, the temperature inside the can is sequentially raised, and finally to 140 ° C., and the hardening of the dimension stabilizing resin is completed in 2 hours.

In the wood bath 10 of this embodiment, the unit material outer surface portions 18b, 20b, 22b and 24b and the bottom plate outer surface portions 14b and 14c are impregnated with the dimension stabilizing resin, and the unit material inner surface portions 18a, 20a, 22a and Since 24a and the bottom plate inner surface portion 14a are made of water-resistant wood, expansion and contraction of dimensions due to changes in ambient humidity conditions are small. Further, the inner surface portion 16a of the wooden unit material and the inner surface portion 14a of the bottom plate are not impregnated with the dimension stabilizing resin, and it is not necessary to use the laminated material, so that the wooden bath 10 can be manufactured at a relatively low cost.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a sectional view taken along the line III-III in FIG.

FIG. 4 is a sectional view taken along line IV-IV in FIG.

FIG. 5 is a perspective view showing a third unit material.

FIG. 6 is a sectional view taken along line VI-VI in FIG. 5;

7 is a cross-sectional view taken along the line VII-VII in FIG.

FIG. 8 is a perspective view showing a fourth unit material.

9 is a sectional view taken along line IX-IX in FIG.

10 is a cross-sectional view taken along the line XX of FIG.

FIG. 11 is a perspective view showing a hollow cylinder that is an assembly of fourth unit materials.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Wooden bathtub 12 Side wall 14 Bottom plate 14a Bottom plate inner surface part 14b, 14c Bottom plate outer surface part 16 Step part 18 1st unit material 18a 1st unit material inner surface part 18b 1st unit material outer surface part 20 2nd unit material 20a No. Second unit material inner surface portion 20b Second unit material outer surface portion 22 Third unit material 22a Third unit material inner surface portion 22b Third unit material outer surface portion 24 Fourth unit material 24a Fourth unit material inner surface portion 24b Fourth unit material outer surface portion

Claims (4)

(57) [Claims] 1. A hollow side wall formed by joining adjacent end surfaces of a plurality of unit materials, a step portion formed on an inner wall at one end of the side wall in the length direction, and an end edge thereof. A wooden bathtub including a bottom plate fitted into the step portion of the side wall and locked to the step portion, wherein the unit material is a unit material inner surface portion formed of water-resistant wood, and a dimension stabilizing resin. A wooden bathtub comprising a unit material outer surface portion made of impregnated laminated wood, wherein an inner surface of the side wall is formed by the unit material inner surface portion, and an exposed surface of the side wall is formed by the unit material outer surface portion. 2. The bottom plate includes a bottom plate inner surface portion made of water-resistant wood and a bottom plate outer surface portion made of a laminated material impregnated with a dimension stabilizing resin, the inner surface of the bottom plate being the bottom plate inner surface. Formed by the part
The wooden bathtub according to claim 1, wherein the exposed surface of the bottom plate is formed by the bottom plate outer surface portion. 3. The wooden bathtub according to claim 1, wherein the wood forming the inner surface of the unit material is cedar. 4. The wood bathtub according to claim 2, wherein the wood forming the inner surface of the unit material and the inner surface of the bottom plate is cedar.