JPH0339122A - Wood bathtub and manufacture thereof - Google Patents

Abstract

PURPOSE:To remarkably increase the efficiency of manufacturing work in mass-production by a method wherein a bathtub is divided into blocks of side wall members and joint members to manufacture them separately, they are joined together by butt joint, and then a bottom plate is arranged on the bottom. CONSTITUTION:A wood bathtub 10 is of a wood frame having a rectangular shape with round corners and consists of a barrel 12 and a bottom plate 14. The barrel 12 is composed of side wall members 22 and 24 having the same shape, an inclined wall member 26, a straight side wall member 28, inclined round joint members 32 and 34 having the same shape, and a straight round joint members 36 and 38 having the same shape, and they are joined together to form the barrel 12. Dovetails 82 are formed along the joint edges of the side wall members 22, 24, 26 and 28, mortises 62 are formed along the joint edges of the side wall members 32, 34, 36 and 38 and they are joined together with the dovetails 82 fitted in the mortises 62. Each joint member is formed into a quarter circle segment composed of two or more unit members 52, and each side wall member is composed of two or more unit members 72.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a wooden bathtub mainly using wood-based materials such as cypress and firewood, and a method for manufacturing the same.

(Prior Art) A conventional wooden bathtub has a rectangular planar shape in which a plurality of unit members having the same cross-sectional shape are butted and bonded one by one.

(Problems to be Solved by the Invention) In this type of wooden bathtub, it has been difficult to improve efficiency in the manufacturing process.

On the other hand, from the standpoint of safety and design, there is a demand for wooden bathtubs with a rectangular shape with rounded corners. Furthermore, there is a demand for a wooden bathtub in which a part of the inner surface of the bathtub is formed with an inclined portion so that a bather can easily lean his/her back against the inner surface of the bathtub. However, it has been difficult to manufacture a wooden bathtub that has such a shape with rounded corners and an inclined portion on its inner peripheral surface.

Therefore, the main object of the present invention is to provide a wooden bathtub that improves efficiency, has rounded corners, and has an inclined portion on its inner peripheral surface, and a method for manufacturing the same. be.

(Means for Solving the Problems) A wooden bathtub according to the present invention is formed by bonding together a plurality of side wall members each having opposing end surfaces and a plurality of curved joint members connecting the side wall members. The joint member includes a cylindrical side shell and a bottom plate fixed to the bottom part of the side shell. A wooden bathtub formed by butting and gluing together to form an arc column body, and at least a part of the inner circumferential surface of the side body is sloped at an obtuse angle with respect to the bottom plate when viewed from the horizontal direction. It is a wooden bathtub.

The method for manufacturing a wooden bathtub according to the present invention includes the steps of: preparing a plurality of first unit members formed by cutting the end faces of a material; and preparing a predetermined number of first unit members with their adjacent end faces facing each other. a step of arranging the first unit members at an appropriate angle and bonding them together to form a hollow substantially cylindrical column; and a step of cutting the hollow substantially cylindrical column into quarters in the circumferential direction. , a step of forming a joint member, and a step of providing a plurality of second unit members having opposing end surfaces,
a step of bonding and bonding the joint end surfaces of the second unit material to form a side wall member; and a step of bonding and bonding the joint member and the side wall member so that a part of the inner circumferential surface thereof is aligned with the bottom plate when viewed from the horizontal direction. This method of manufacturing a wooden bathtub includes the steps of forming a side body so as to be inclined at an obtuse angle, and fixing a bottom plate to the bottom portion of the side body.

(Operations and Effects of the Invention) According to the present invention, since the side wall member and the joint member are divided into blocks and manufactured separately, the efficiency of the manufacturing operation can be significantly increased during mass production. In addition, since an inclined part is formed on the inner circumferential surface of the side body,
The bather can easily lean back against that area;
And it's less tiring.

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

(Embodiment) FIG. 1 is a plan view showing an embodiment of the present invention, FIG. 2 is a front view thereof, and FIG. 3 is a side view thereof.

The wooden bathtub IO is formed as a substantially rectangular frame with rounded corners when viewed from above. This wooden bathtub 10 includes a side body 12 and a bottom plate 14 attached to the side body 12. As shown in FIG. 1, a drain hole 16 of an appropriate size is formed in the bottom plate 14 near the edge. Further, on the lower surface of the bottom plate 14, a disk-shaped plate 18 made of, for example, rubber is formed at the center and four corners.

The side body 12 includes two relatively long, substantially identical side wall members 22 and 24, each of which faces each other and has, for example, a rectangular cross-sectional end surface, and one relatively short, sloped side wall member 26. , one relatively short sidewall member 32 that is not sloped, and two curved joint members 32 of approximately the same shape that are sloped.
and 34 and two non-beveled curved joint members 36 and 38. Each of the joint members 32 and 34 is formed into an arcuate column whose circumference is divided into quarters and has an arcuate cross section with a slope. Further, the joint members 36 and 38 are each formed into an arcuate column whose circumference is divided into quarters and whose cross section is an arc with no slope.

On the other hand, so-called dovetail-shaped dovetail grooves 82 are provided on the abutting end surfaces of the side wall members 22, 24, 26, and 28, respectively. On the other hand, a dovetail groove 62 having the same shape as the dovetail groove 82 is provided on the abutting end surfaces of the joint members 32, 34, 36 and 38, respectively. Then, by fitting the dovetail groove 82 into the dovetail groove 62, the side wall member 2
2, 24, 26 and 28 and joint member 32, 34
36 and 38 are respectively joined.

The joint members 32, 34, 36 and 38 are formed using a plurality of first unit members 52 as shown in FIG. The first unit member 52 is made of wood such as cypress or wood, and has a columnar shape with a cross section that approximates a trapezoid. Concave shapes 54 and convex shapes 55 extending in the longitudinal direction are formed alternately in the width direction on both end surfaces of the first unit member 52.

Then, the plurality of first unit members 52 are bonded and bonded to each other at their end faces.

The side wall members 22, 24, 26, and 28 are formed by assembling a plurality of elongated second unit members 72 as shown in FIG.

The second unit member 72 is made of wood such as cypress or wood, as shown in FIG. 12, and is formed into a long prismatic shape whose cross section is approximately rectangular. A dovetail groove 74 and a dovetail groove 76 extending in the longitudinal direction are formed on opposing end surfaces of the second unit member 72, respectively. The dovetail groove 74 is
As can be seen from FIG. 13, this is a dovetail groove formed in a tapered shape so that the groove width gradually becomes wider from one end of the second unit member 72 in the longitudinal direction to the other end. And the ants are 76
is a dovetail groove formed in a tapered shape from one end of the second unit member 72 in the longitudinal direction to the other end so that the width of the tenon gradually becomes narrower.

Next, a method for manufacturing this wooden bathtub 10 will be explained.

First, prepare a plurality of materials such as wood that have approximately the same width, length, and thickness, and use a saw or cutter to cut parallel grooves 54 and protrusions 55 alternately in the longitudinal direction on the end surface of the materials. As shown in FIG. 4, a plurality of first unit members 52 having the same cross-sectional shape and having finger-shaped end surfaces 53 are formed. In this example, the cross section of the wood end is planar finished, and has a width of 101 mm, a thickness of 70 mm, and a length of 9 mm.
Twelve pieces formed in 00U are prepared. Note that the first unit member 52 is made of a wood material such as wood, cypress, or cypress.

As shown in FIG. 7, an I
The angle θ formed by A and A is determined so as to form an appropriate taper angle in accordance with the number of first unit members 52 forming one columnar material and the shape, particularly the cross-sectional shape, of the columnar material. In this embodiment, the angle θ is 30' because the 12 first unit members 52 form the bottom shape of one columnar member having a substantially circular cross section.

Next, as shown in FIG. 5, the 12 first unit members 52
are arranged adjacent to each other in a horizontal row and continuous, and a plurality of flexible sheets 57 such as gi tape or cloth tape are pasted in the width direction on one surface of the continuous first unit material 52. The arrangement of the unit members 52 is fixed. In addition to being attached as described above, the flexible sheet 57 may be attached to the entire surface of the continuous first unit member 52 or along the length direction of the joining end surface 53.

After that, the first unit members 52 are sequentially bent using the visibility sheet 57 as a guide, and the finger-shaped joint end surface 5 is formed.
In step 3, the first unit members 52 are brought into contact with each other at an angle of 30° and are closely bonded so that the grooves 54 and the protrusions 55 mesh with each other.

After the first unit members 52 are bonded to each other, if the flexible sheet 57 is removed from the outer surface of the first unit members 52, a hollow dodecagonal cylindrical column is formed as shown in FIGS. 6 to 8. 51 are manufactured.

Next, the outer periphery of the dodecagonal cylindrical column 51 is cut, for example, with a cutter to form a suitably required outer diameter. Then this one
The diagonal cylindrical column 51 is cut to the required height of the side body 12 as appropriate. Furthermore, the inner periphery of this dodecagonal cylindrical column 51 is cut, for example, with a cutter to form a suitably required inner diameter. In this way, a hollow substantially cylindrical column 51' as shown in FIG. 9 is manufactured. In this embodiment, the height of the side body 12 is 570 mm, and the thickness of the hollow substantially cylindrical column 51' is, for example, 55 mm. This hollow approximately cylindrical column 51
The thickness of ' is the same as the thickness of the side wall member described later.

This hollow substantially cylindrical column 51' is divided into 906 parts in the circumferential direction using, for example, an angle divider, and then cut using a saw or the like.

In this way, arc columns 32', 34', 36' and 38' having arc-shaped cross sections as shown in FIG. 10 can be manufactured.

Thereafter, dovetail grooves 62 as shown in FIG. 11A are formed in these arch columns 32', 34', 36' and 38'. Furthermore, as shown in FIG. 11B, the arc columns 32' and 34' are tilted at an appropriate angle, and are cut using a cutter or the like so that their upper and lower ends are in contact with the ground according to the angle. disconnected. And the first
Beveled joint members 32 and 34 are formed as shown in the IC diagram. Further, the arch columns 36' and 38' can be used as joint members 36 and 38 without being sloped.

Next, a method of manufacturing the side wall members 22, 24, 26, and 28 will be described.

First, as shown in FIG. 12, for example, the radius lQ l
A columnar square material 71 having a rectangular cross section and a thickness of 55 mm and a length of 900 u is prepared. This square material 71 has a first
As shown in FIG. 3, a dovetail groove 74 and a dovetail groove 76 are formed.

That is, this square piece 71 is fixedly placed on a moving table (not shown) of a processing device. In order to simultaneously form dovetail grooves 74 and moth grooves 76 on both sides with one reciprocation of the moving table, a cutter for cutting dovetail grooves is applied to one side of the square timber 71, and a cutter for cutting dovetail grooves is applied to the other side. is given. The cutters are fixedly attached to the front of the movable table and face each other horizontally at a constant interval corresponding to the width of the square timber 71. Then, the movable table on which the square material 71 is placed is moved in one direction of the cutter. At this time, the movable table is tilted with respect to the horizontal direction as it moves. This movable table has a structure that allows it to tilt upward or downward with a predetermined stroke. Therefore, the square timber 71 on the movable table has dovetail grooves 74 as the movable table moves.
A dovetail groove 76 is formed horizontally, and the dovetail groove 74 and dovetail groove 76 are simultaneously tapered. In this way, the second unit member 72 as shown in FIG. 13 is formed. In this case, a required number of second unit members 72 as shown in FIG. 13 are manufactured as appropriate.

Furthermore, a second unit member 72a having only a dovetail groove 74;
A second unit member 72b having only a dovetail groove 76 is manufactured. Then, a dovetail groove 76 formed on another second unit member 72 is fitted into the dovetail groove 74 formed on the second unit member 72 . In this way, the plurality of second unit members 72 are assembled. Further, a dovetail groove 76 of another second unit member 72b is fitted into the dovetail groove 74 on one end surface of the assembled product. In addition, in the dovetail groove 76 on the other end surface of the assembled product, there is a dovetail groove 76 in the other second unit member 72a.
4 is inserted. Then each second unit material?
2, 72a and 72b are bonded together to produce a plate-like member as shown in FIG. 14A. In this way, when a plate-shaped member with the required length A is manufactured, the required height B of the plate-shaped member is cut with a saw, for example, using both ends of this length A as reference planes. shaped members 22', 24', 26' and 2
8' is manufactured.

On one side of the plate members 22' and 24', as shown in FIG. 14B, a cut portion is formed in a tapered shape so that the width thereof gradually increases from one end to the other end in the width direction. C is cut, for example, with a cutter. In this way, side wall members 22 and 24 as shown in FIG. 14C can be manufactured.

Further, the plate-like member 26' is tilted at an appropriate angle, and is cut with a cutter, for example, so that the upper end and the lower end are in contact with the ground according to the angle (11th
See Figure B and Figure 11C. In this manner, a sloped sidewall member 26 is formed.

Further, the plate member 2'8' is used as the side wall member 2'8 without being sloped. After that, the first
As shown in FIG. 5, dovetail grooves 82 are manufactured at both ends of these side wall members to join the dovetail grooves 62 of the joint members.

In this way, the side wall member 22°24.2 shown in FIG.
6 and 28, respectively. The bottom plate is also manufactured in a similar manner.

Finally, the side wall members 22, 24, 26 are inserted into the dovetail grooves 62 formed in the joint members 32, 34, 36, and 38 mentioned above.
Dovetail grooves 82 formed in and 28 are fitted to assemble the side body I2 of this wooden bathtub 10. In this case, first,
One ends of joint members 32 and 34 are fitted to both ends of side wall member 26 . Next, one end of the side wall members 22 and 24 is fitted to the other end of the joint members 32 and 34. One ends of joint members 36 and 38 are fitted to the other ends of side wall members 22 and 24, and side wall member 28 is fitted between the other ends of joint members 36 and 38.

A bottom plate 14 is attached to the lower part of the side body 12 using, for example, stainless steel wood screws 15. Further, in some cases, the lower part of the side body 12 and the bottom plate 14 are connected with adhesive and attached with stainless steel wood screws 15. Furthermore, a rectangular plate 18 made of, for example, rubber is attached to the lower surface of the bottom plate 14 with stainless steel wood screws (not shown). This improves water drainage at the bottom of the wooden bathtub IO.

This wooden bathtub 10 is assembled with the ends of each of the first unit members 52 m and each of the second unit members 72 facing upward and downward, so that water does not permeate into the wooden bathtub 10. It doesn't get dirty, so the bathtub looks good. Also, joint members 32° 34.36 and 3B and side wall member 2
2. 24. 26 and 28 are the respective first unit members 52
and each second unit material 72, so the wooden bathtub 10
There is no deviation and it is strong. Further, in this wooden bathtub 10, the side wall member 2G and the joint members 32 and 34 are formed so as to be inclined outward, so that the bather can easily lean back and be less fatigued.

In this embodiment, side wall member 26. Although the joint members 32 and 34 are formed to be inclined outwardly, the side body 1
Each joint member and each side wall member may be sloped so that the entirety of the joint member 2 is inclined outwardly.

In addition, in order to give strength to the wooden bathtub 10 and to prevent water leakage and staining, a synthetic resin such as urethane resin is applied to the inner peripheral surface and the upper part of the side body 12 and the upper part or the entire bottom plate 14. A protective layer may also be formed.

Further, the thickness direction of the first unit material and the second unit material used in the above-mentioned embodiments is 2-bly or 3-bly.
Unit materials manufactured by laminating may be used for the ply. By using unit materials laminated in the thickness direction in this way, there is less warping of the wood, and it also serves to prevent water leakage.

Regarding the direction of lamination, for example, in the case of two-ply lamination, it is better to adhere the back sides of the pieces of wood to each other so that the front sides of each piece of wood face outward, as this will reduce warpage and give a better appearance.

Next, another method of manufacturing an arc column body to be a joint member will be described. In this case, as shown in Figure 16,
A material 92 in which two plies are laminated in the thickness direction is used. The material 92 has a planar cross-section at the end, and is formed to have a width of 101 ms, a thickness of 70 mm, and a length of 900 mm, for example. Further, the material 92 is made of a wood material such as firewood, cypress, and hiba, as in the previous embodiment. For example, twelve pieces of this material 92 are prepared. Then, grooves 96 are formed in the longitudinal direction of the material 92 using a machine or the like to produce unit materials 94. Furthermore, these single price hits 94 are 12
This assembly is bonded to produce a dodecagonal cylinder. The process up to this point is the same as in the previous embodiment. However, the following manufacturing order is different from that of the previous embodiment. That is, as shown in FIG. 17, the outer circumferential surface of this dodecagonal cylindrical column is cut, for example, with a cutter to form a suitably required outer diameter.

Thereafter, this dodecagonal cylindrical column is cut to the required height of the side body. The dodecagonal cylinder column obtained in this way is
As shown in the figure, it is divided into 90 degrees in the circumferential direction using an angle divider or the like, and then cut into quarters using a saw, for example. Then, using the outer circumferential surface of this substantially arcuate column 97 as a reference plane, the inner circumferential surface is processed, for example, with a cutter, to form the inner diameter as appropriate. In this way, the arc column body 9 as shown in FIG.
B is created. Note that the finished thickness at this time is the same as the thickness of the side wall member. Thereafter, dovetail grooves 99 may be formed at both ends of the arc column body 98.

Next, other methods for attaching the bottom plate will be explained.

The method for attaching the bottom plate 102 shown in FIG. 21 is to first form a substantially rectangular stepped portion 106 with rounded four corners on the lower part of the side body 104 for locking the bottom plate 102. Then, the bottom plate 102 is locked to the stepped portion 106, and the bottom plate 102 is fixed to the side body 104 using, for example, a plurality of wood screws 107. In this case, the upper surface or the entire surface of the bottom plate 102, the inner peripheral surface of the side shell 104, and the upper surface of the side shell 104 are coated with a highly water-resistant synthetic resin, for example, to form a protection layer N10B to prevent water leakage. It is prevented. Further, a plate 109 made of rubber or the like and having a rectangular cross section is attached to the lower surface of the bottom plate 102 using, for example, a plurality of wood pieces. This improves water drainage at the bottom of this wooden bathtub. Further, as described above, even if the bottom plate 102 is fixed to the side shell 104 with wood screws, there is almost no gap between the bottom plate 102 and the side shell 104.

This includes the upper surface or the entire surface of the bottom plate 102 and the side body 104.
This is because the protective layer 108 is formed on the inner circumferential surface of the wood, which prevents water from penetrating and prevents the wood from expanding and contracting. Accordingly, even if the bottom panel 102 is fixed to the side body 104 with wood pegs 107 or the like, the bottom plate 102 will not expand or contract. Note that the above-mentioned protective layer 108 is not formed on the outer peripheral surface of the side body 104. This is to bring out the scent of wood and to enjoy the texture. Further, when the bottom plate 102 is to be locked to the stepped portion 106 at the lower part of the side body 104, an adhesive may be applied in advance to the place where the bottom vi, 102 and the stepped portion 106 are joined.

Next, a method for attaching the bottom plate 112 shown in FIG. 22 will be explained.

First, a stepped portion 116 for locking the bottom plate 112 is formed at the lower part of the side body 114. This stepped portion 116 has, for example, a concave shape. 1tllB is formed. In addition, the bottom plate 1
For example, a concave groove 119 facing the groove 118 is also formed on the outer periphery of the groove 12 .

Then, for example, silicone resin is injected into the gap and groove between the stepped portion 116 and the bottom plate 112 and hardened. This is to prevent expansion and contraction of the bottom plate 112 from being hindered.

The method for attaching the bottom plate 122 shown in FIG. 23 is to first form, for example, a rectangular groove 126 in the lower part of the side body 124 into which the bottom plate 122 is fitted.

The side body 124 is assembled by fitting the bottom +7ij 122 into this groove 126. In addition, the side body 124 and the bottom plate 122
A rubber buffkin 129 having, for example, a circular cross section is provided in the gap 128 between the bottom film 22 and the bottom film 22 so as not to hinder expansion and contraction of the bottom film 22.

The method for attaching the bottom plate 132 shown in FIG. 24 is the same as the method for attaching the bottom plate 122 shown in FIG.
32 is locked in the groove 136 of the side body 134. and,
In particular, a rubber plate 138 or the like is provided in the gap between the side body 134 and the bottom plate 132, for example. As a result, the bottom plate 132
This is done so as not to impede the expansion and contraction of.

The method for installing the bottom plate 142 shown in FIG. 25 is as follows: First, the method for installing the bottom plate 132 shown in FIG.
The bottom plate 142 is fitted into the groove 146 of the side body 144.

Further, the bottom plate 142 is fixed from the outer periphery of the side body 144 with, for example, wood screws 148. In this case, the upper surface or the entire surface of the bottom plate 142, the inner peripheral surface of the side shell 144, and the side shell 14
A protective layer 150 is formed on the upper surface of 4.

The bottom plate can also be fixed by the method described above.

In addition, as shown in Figure 26, all wooden bathtubs have
A plurality of, for example, circular holes 166 are opened in the side body 164,
A device may be installed to constantly clean the water by emitting a jet jet to circulate the water.Also, a plurality of small circular holes 163, for example, may be made in the bottom plate 162 to blow air and create bubbles in the bathtub. You can use it by taking it out.

FIGS. 27 to 31 are illustrative views showing other examples of side wall members.

The side wall member 172 shown in FIG. 27 has a plurality of second units having a trapezoidal cross-section and tapered dovetail groove 174 on one side and a dovetail groove 176 that fits into the dovetail groove 174 on the other side. A second unit member 178a having only a dovetail groove 176' having the same shape as the dovetail groove 176 on one side, and a second unit member 178a having only a dovetail groove 174' having the same shape as the dovetail groove 174 on one side. It is formed by joining the second unit member 178b.

The side wall member 182 shown in FIG. 28 includes a plurality of second unit members 186a having dovetail grooves 184 having a trapezoidal cross section on one and the other, and a plurality of dovetail grooves 18B having a trapezoidal cross section on one and the other. It is formed by joining the second unit member 186b and the second unit member 189 having only the above-mentioned trapezoidal dovetail groove 188 in cross section on one side. In addition, when the second unit member 186b having the moth grooves 188 on one and the other side is located second from the end, the length is 1 m.
As the second unit material, instead of the second unit material 189 having only the dovetail groove 188 on one side thereof, a second unit material having only the dovetail groove 184 on one side thereof may be used.

The side wall member 192 shown in FIG. 29 has finger-shaped ? A plurality of second unit members 196 having a groove I 194 and a finger-shaped groove 194 in only one of them.
It is formed by joining the second unit material 198 having the following.

The side wall member 202 shown in FIG.
and a plurality of second unit members 208 having a dovetail groove 204 with a trapezoidal cross section and a dovetail groove 206 with a trapezoidal cross section in only one of them.
It is formed by joining the second unit member 209 having the above.

The side wall member 212 shown in FIG.
It is formed by joining a second unit member 218a having only a letter-shaped convex portion 216 and a second unit member 218b having only a V-shaped cross-sectional groove 214 on one side thereof.

In addition to the structure shown in FIGS. 27 to 31, the side wall member may be formed by joining a plurality of second unit members each having a rectangular flat end face, for example.

32 to 37 are principal part plan views showing other examples of a hollow substantially cylindrical column for manufacturing an arc column body to be a joint member.

A hollow substantially cylindrical column 222 shown in FIG. 32 has a plurality of second unit members having a dovetail groove 224 having a trapezoidal cross section on one side thereof and a dovetail groove 226 that fits into the dovetail groove 224 on the other side. 22
It is formed by joining 8.

The hollow substantially cylindrical column 232 shown in FIG.
It is formed by joining a plurality of second unit members 238 having .

The hollow, substantially cylindrical column 242 shown in FIG. It is formed by joining a plurality of second unit members 249 having .

The hollow substantially cylindrical column 252 shown in FIG. It is formed by joining the second unit members 258.

The hollow substantially cylindrical column 262 shown in FIG.
60 is formed by joining a plurality of holding members 266 that are formed in a shape that fits into dovetail grooves 264 that extend on both sides of the contact surfaces when the opposing end surfaces are brought into close contact.

The hollow substantially cylindrical column 272 shown in FIG. The dovetail groove 278 having a thick tip is formed by joining a plurality of second unit members 279 .

FIGS. 38 to 41 are illustrative plan views of essential parts showing other examples of the side shell.

The side body 282 shown in FIG.
86, a joint member 288 having a trapezoidal cross section and a tapered dovetail groove 284 on one and the other thereof, and a holding member 289.

The side body 292 shown in FIG. 39 has a side wall member 296 having a convex portion 294 having a trapezoidal cross section on one side and the other side, and a joint member 299 having a recess portion 298 having a trapezoidal cross section on one side and the other side. formed by.

The side body 302 shown in FIG. 40 is formed by joining a side wall member 306 having finger-shaped end surfaces 304 on one and the other thereof, and a joint member 308 having finger-like end surfaces 304 on one and the other thereof. Ru.

The side body 312 shown in FIG. 41 includes a side wall member 316 having a dovetail groove 314 having a rectangular cross section on one side and the other side, a joint member 318 having a dovetail groove 314 having a rectangular cross section on one side and the other side, and a joint member 318 having a rectangular cross section. It is formed by joining the member 319.

In addition, when manufacturing the polygonal cylindrical column, in each of the above-mentioned examples, the plurality of first unit members were fixed with flexible sheets, but instead of such flexible sheets, for example, as shown in FIG. A plurality of first unit members may be fixed using a tightening machine.

That is, this tightening forming machine 500 includes a rectangular body 501, as shown in FIG.
are formed, and a sliding body 506 is slidably fixed to the guide grooves 505 and 505. A spiral is cut in the body of the sliding body 506, and a flattened pin 507 as a disc-shaped locking body is screwed onto the upper part so as to lock a wire rope 516 as a tightening device. The Hiha Lipin 507
There is a groove 5 on the outer periphery of the wire rope 516 for hanging and turning the wire rope 516.
07a is formed all around.

510 is a spiral body, and a spiral rod 5 forming the spiral body 510
11 has a spiral 511a cut therein, is screwed into the sliding body 506, and is rotatably fixed to the front end portion 503 of the body 501 via a radial bearing. 514 is a polygonal head into which a handle (not shown) used when rotating the spiral rod 511 is inserted.

515a and 515b are rod-shaped pins as attachment members for attaching one end of the wire rope 516;
The pins 515a and 515b are connected to the rear end 50 of the fuselage 501.
4 into holes 504a and 504b,
It is designed to be able to move up and down.

The distance between the left and right pair of pins 515a and 515b is determined by the groove 507a of the open pin 507 so that the wire rope 516 can be hung as described later.
If the width is the diameter of the circle formed by the bottom of the groove plus a length approximately three times the diameter of the wire rope 516, then
6 are wound approximately in parallel around the object to be tightened and attached to pins 515a and 515b.

In addition, the positions of the holes 504a and 504b are such that the center of the disc-shaped Hibari pin 507 is located on the extension line that divides the cotton into three equal parts connecting the left and right holes 504a and 504b, and on the extension line that divides the cotton into thirds. Hibari pin 507, that is, sliding body 5
16 is set to move.

In order to manufacture the polygonal cylindrical column 600 using this tightening forming machine 500, first, the bins 515a and 515b are pulled out, and the rings 516a and 516a formed at one end of the wire row 1516 are inserted into the bins 515a and 515b. and place the wire lobe 516 on the fuselage 501.

On the other hand, a predetermined number of unit members 602 having the same cross-sectional shape are prepared, each having a tapered angle in advance to form an appropriate polygonal cylindrical column 600, and having a joint end face shaped into a finger shape or trapezoid shape, for example. Then, an adhesive is applied to the joining end surface of each unit member 602, and the unit members 602 are placed on the body 501 while being bonded together. At this time, each unit material 602
are assembled into a cylindrical shape.

Thereafter, the wire lobe 516 is wrapped once around each assembled unit member 602, and 51 of the wire lobe 516 is
Hook the part 6b onto the pin 517. and,
By turning the handle of the machine body 501, each unit material 60
2 is strongly tightened from its periphery to manufacture a polygonal cylindrical column 600.

In this tightening forming machine 500, since each unit material 602 is strongly tightened by the wire lobe 516, each unit material 602
is firmly adhered.

[Brief explanation of drawings]

FIG. 1 is a plan view showing an embodiment of the present invention, FIG. 2 is a front view thereof, and FIG. 3 is a side view thereof. FIG. 4 is a perspective view of a portion of the first unit member. FIG. 5 is an explanatory diagram of a method of manufacturing the dodecagonal cylindrical column shown in FIGS. 6 to 8. FIG. 6 is a perspective view of a main part of a dodecagonal cylindrical column, FIG. 7 is an enlarged sectional view of a portion thereof, and FIG. 8 is a plan view thereof. FIG. 9 is a plan view showing the process of forming the dodecagonal cylindrical column shown in FIGS. 6 to 8 into a hollow substantially cylindrical column. FIG. 10 is a plan view showing an arc column body to become a joint member. FIG. 11A is a plan view showing a state in which dovetail grooves are formed in the arc column body shown in FIG. 10. FIG. 11B shows that the arc column body is tilted at an appropriate angle,
And, it is an illustrative view showing a state where the upper end and the lower end thereof are cut so as to be in contact with the ground. FIG. 11C is an illustrative view showing a beveled joint member. FIG. 12 is a perspective view showing an example of a material used for the second unit material shown in FIG. 13. FIG. 13 is a perspective view showing the second unit member. FIG. 14A is a perspective view of a main part of a plate member formed by assembling the second unit members shown in FIG. 13. FIG. 14B is an illustrative view showing a plate-like member cut diagonally from one end to the other end in the width direction. FIG. 14C is an illustrative view showing a relatively long side wall member. FIG. 15 is a plan view showing a state in which dovetail grooves are formed on the side wall member. FIGS. 16 to 19 are explanatory diagrams showing another method of manufacturing the arc column body to be the joint member shown in FIG. 1O. FIG. 20 is a plan view showing a state in which dovetail grooves are formed in the arc column body that is to become the joint member shown in FIG. 19. FIGS. 21 to 26 are illustrative views showing other examples of the method for attaching the bottom plate. FIGS. 27 to 31 are illustrative views showing other examples of side wall members. 32 to 37 are principal part plan views showing other examples of a hollow substantially cylindrical column for manufacturing an arc column body to be a joint member. FIGS. 38 to 41 are illustrative plan views of essential parts showing other examples of the side shell. FIG. 42 is a perspective view showing a tightening forming machine for manufacturing a polygonal cylindrical column. In the figure, 10 is a wooden bathtub, 12 is a side body, 14 is a bottom plate, 15 is a wood screw, 16 is a drain hole, 18 is a plate, 2
2, 24, 26.28 are side wall members 22'24', 2
6' and 28' are plate members, 32.34, 36.38
is a joint member, 3234', 36' and 38' are arc cylinder bodies, 51 is a dodecagonal cylindrical column, 51' is a hollow approximately cylindrical column,
52 is a first unit member, 53 is a joint end surface, 54 is a grooved strip, 5
5 is a convex strip, 62.74 is a dovetail groove, 71 is a material, 72.72
a and 72b indicate the second unit material, and 76.82 indicates the dovetail groove.

Claims (1)

[Scope of Claims] 1. A cylindrical side body formed by butting and adhering a plurality of side wall members each having opposing end surfaces and a plurality of curved joint members connecting the side wall members, and the side The joint member includes a bottom plate fixed to the bottom part of the body, and the joint member is made of a plurality of unit members formed by cutting the end faces of materials to form joint end faces, butted together at an appropriate angle and bonded together to form an arc column body. A wooden bathtub formed of a wooden bathtub, wherein at least a part of the inner circumferential surface of the side body is sloped at an obtuse angle with respect to the bottom plate when viewed from the horizontal direction. 2. A step of preparing a plurality of first unit members formed by cutting the end faces of the material to form joint end faces, and arranging a predetermined number of the first unit members so that their adjacent end faces face each other. A step of butting and gluing the first unit members together at an appropriate angle to form a hollow substantially cylindrical column; A step of cutting the hollow substantially cylindrical column into quarters in the circumferential direction to form a joint member. a step of preparing a plurality of second unit members having opposing end surfaces; a step of bonding and bonding joint end surfaces of the second unit members to form a side wall member; the joint member and the side wall member. forming a side shell so that a part of its inner peripheral surface is inclined at an obtuse angle with respect to the bottom plate when viewed from the horizontal direction, and fixing the bottom plate to the bottom part of the side shell. A method for manufacturing a wooden bathtub, including a process.