JPH0255023A - Wooden bathtub and manufacture thereof - Google Patents

Abstract

PURPOSE:To efficiently manufacture a wooden bathtub having roundness at four corners by forming a joint member into an arcuate pillar body by butt- joining a plurality of unit members having each joint edge surface which is formed by cutting the edge surface of a basic member, at a proper angle. CONSTITUTION:A plurality of first unit members 52 having each joint edge surface which is formed by cutting the edge surface 53 of a basic member are prepared, and a prescribed number of first unit members 52 are arranged so that the contiguous edge surface 53 are opposed. The first unit members 52 are butt-joined at a proper angle, and a hollow cylinder 51' is formed. Joint members 32, 34, 36, and 38 are formed by cutting said hollow cylinder 51' into four parts in the circumferential direction. Further, a plurality of second unit member 72 having the opposed edge surfaces 74 and 76 are prepared, and the side wall members 22, 24, 26, and 28 are formed by joint-attaching the joint edge surfaces 74 and 76 of the second unit members 72. A side trunk 12 is formed by butt-joining these joint members and the side wall members, and a bottom plate 14 is fixed onto the bottom part of the side trunk 12.

Description

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

(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.

(Problem B 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. However, it is difficult to manufacture a wooden bathtub with rounded corners.

Therefore, the main object of the present invention is to provide a wooden bathtub with rounded corners and a method for manufacturing the same, which improves efficiency.

(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 body and a bottom plate fixed to the bottom part of the side body, and the joint member is formed by cutting the end faces of the materials to form a joining end face, and then connects a plurality of unit materials to each other as appropriate. This is a wooden bathtub that is formed into a temporary column by butting and gluing at an angle.

The method for manufacturing a wooden bathtub according to the present invention includes the steps of: preparing a plurality of first unit materials each having a joint end surface formed by cutting an end surface of a material; a step of arranging 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, and a step of arranging the hollow substantially cylindrical column in the circumferential direction. A step of cutting into half to form a joint member, a step of preparing a plurality of second unit members having opposing end surfaces, and a step of bonding and bonding the joining end surfaces of the second unit members to form a side wall member. a step of forming a side body by butting and gluing the joint member and the side wall member;
This method of manufacturing a wooden bathtub includes the step of fixing a bottom plate to the bottom part of a side body.

(Operations and Effects of the Invention) According to the present invention, since the side wall member and the joint member are each divided into blocks and manufactured separately, it is possible to significantly improve the efficiency of manufacturing work during mass production.

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 IO 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 two relatively short, substantially identical side wall members 26.
and 28 are formed by joining four curved joint members 32, 34, 36 and 38 of substantially the same shape. Note that the joint members 32, 34, 36, and 38 are each formed into a temporary column having an arcuate cross section with the circumference divided into quarters.

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, the abutting end surfaces of the joint members 32, 34, 36 and 38 are each provided with a dovetail groove 62 having the same shape as the groove 82 at the end. 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, for example, wood such as cypress or sardine, and is formed into 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, as shown in FIG. 12, is made of wood such as cypress or shingle, 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. As can be seen from FIG. 13, the dovetail groove 74 is a dovetail groove formed in a tapered shape so that the groove width gradually increases from one end of the second unit member 72 in the longitudinal direction to the other end. And the ants are 7
6 from one end of the second unit member 72 in the longitudinal direction to the other end,
A dovetail is formed in a tapered shape so that the width of the tenon gradually becomes narrower.

Next, a method of 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 finished with a burena finish, and the width is 101 mm, the thickness is 701 mm, and the length is 90 mm.
There are 12 pieces formed at 0 angle. Note that this first unit material 52 is made of, for example, wood, cypress, hiba,
It is made of wood materials such as sardines.

As shown in FIG. 7, the angle θ formed by the lines A and A connecting the upper part of the protruding line 55 or the bottom of the concave line 54 on the joint end surface 53 of the first unit member 52 forms one columnar member. An appropriate taper angle is determined depending on the number of first unit members 52 and the shape, particularly the cross-sectional shape, of the columnar members. In this embodiment, since one columnar member having a substantially circular cross section is formed using the 12 first unit members 52, the angle θ is 30''.

Next, as shown in FIG. 5, the 12 first unit members 52
are arranged adjacent to each other in a horizontal row, 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 member 52, and each 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 flexible sheet 57 as a guide, and the finger-shaped joint end surfaces 5 are 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 set to 570mm, and the thickness of the hollow substantially cylindrical column 51' is set to 55n+, for example. This hollow approximately cylindrical column 5
The thickness of 1' is the same as the thickness of the side wall member described later.

This hollow substantially cylindrical column 51' is circumferentially divided into 90° sections using an angle divider or the like, and then cut using a saw or the like.

In this way, joint members 32, 34, 36 and 38 as shown in FIG. 10 can be manufactured.

Thereafter, dovetail grooves 62 as shown in FIG. 11 are manufactured in these joint members 32, 3436 and 38.

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 width 101n,
Column-shaped square lumber 7 with a rectangular cross section and a thickness of 55 mm and a length of 900 mm
1 is prepared. 13, a dovetail groove 74 and a dovetail groove 76 are formed in this square piece 71. As shown in FIG.

That is, this square piece 71 is fixedly placed on a moving table (not shown) of a processing device. In order to form dovetail grooves 74 and dovetail grooves 76 on both sides at the same time with one reciprocation of the moving table, a cutter for cutting dovetail grooves is applied to one side of the square timber 71.
A cutter for cutting dovetails is applied to the other side. The cutter is fixedly attached to the front of the moving table.
They 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 (as it moves). This single multi-moving table is structured so that it can tilt upward or downward with a predetermined stroke. As the moving table moves, a dovetail groove 74 and a dovetail groove 76 are formed horizontally on the square piece 71 on the moving table, and the dovetail groove 74 and dovetail groove 76 are simultaneously tapered. In this way, the second unit material 72 as shown in Fig. 13 is formed.In this case, the second unit material 72 as shown in Fig. 13 is manufactured in the required number.

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 in another second unit member 72 is fitted into the dovetail groove 74 formed in 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 on the other end surface of the other second unit material 72a.
74 is fitted. Thereafter, the respective second unit members 72, 72a and 72b are adhered to produce a side wall member as shown in FIG. 14. In this way, when a side wall member of the required length A is manufactured, the required height B of the side wall member is manufactured by using both ends of this length A as a reference plane, for example, by cutting the side wall member with a saw. . Thereafter, as shown in FIG. 15, dovetail grooves 82 are manufactured at both ends of this side wall member to join the dovetail grooves 62 of the joint member.

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 12 of this wooden bathtub 10. 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 formed of, for example, rubber is attached to the lower surface of the bottom plate 14 with stainless wood screws (not shown). This improves water drainage at the bottom of the wooden bathtub 10.

This wooden bathtub 10 is assembled with the end of each first unit member 52 and each second unit member 72 facing upward and downward. It doesn't get dirty, so the bathtub looks good. In addition, the joint members 32° 34, 36 and 38 and the side wall member 2
Since 2, 24, 26 and 2B are an assembly of each of the first unit members 52 and each of the second unit members 72, the wooden bathtub 10 is not distorted and has strength. 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.

Furthermore, the thickness direction of the first unit material and the second unit material used in the above embodiments is 2-ply or 3-ply.
For the braai, unit materials manufactured by laminating may be used. 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 a joint member will be described. In this case, as shown in FIG.
A blank laminated material 92 is used.

In addition, this material 92 has a planar finish on the cross section of the end,
For example, width 101mm, thickness 70u+, length 900■
1 is formed. Further, the material 92 is made of wood materials such as firewood, cypress, hiba, and shira, as in the previous embodiment. For example, twelve pieces of this material 92 are prepared. Grooving is done by using a machine etc. to create grooves 9 in the longitudinal direction of the material 92.
6 to form a unit material 94. Furthermore, 12 of these unit members 94 are glued together to produce a dodecagonal cylindrical column.

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. As shown in FIG. 18, the dodecagonal cylindrical column thus obtained is divided into 90" pieces in the circumferential direction using an angle divider or the like, and 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 a suitably necessary inner diameter.In this way, a joint member 98 as shown in FIG. 19 is formed. 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 joint member 98.

Next, other methods of 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 engaged with the stepped portion 106, and the bottom FilO2 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 IO2, the inner circumferential surface of the side shell 104, and the upper surface of the side shell 104 are coated with water-resistant synthetic resin, for example, to form a protection 11108 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 screws. This improves water drainage at the bottom of this wooden bathtub. Furthermore, as described above, even if the bottom plate 102 is fixed to the side body 104 with wood screws,
There is almost no gap between the bottom plate 102 and the side body 104.

This includes the upper surface or the entire surface of the bottom plate 102 and the side body 104.
This is because the retainer 108 is formed on the inner peripheral surface of the wood, preventing water from penetrating and preventing the wood from expanding and contracting. Therefore, even if the bottom plate 102 is fixed to the side body 104 with the wood screws 107 or the like, the bottom plate 102 will not expand or contract. Note that the above-mentioned protective layer 108 covers the outside 11 of the side body 104.
It is not formed on the surface. 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 plate 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. For example, a concave groove 11B is formed in this stepped portion 116. In addition, the bottom plate 112
For example, a concave groove 1 facing the groove 118 is also provided on the outer periphery of the
19 is formed.

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 'a 126 into which the bottom plate 122 is fitted in the lower part of the side body 124.

While fitting the bottom plate 122 into this groove 126,
4 will be assembled. Further, a rubber packing 129 having a circular cross section, for example, is provided in a gap 128 between the side body 124 and the bottom plate 122 so as not to impede expansion and contraction of the bottom plate 122.

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 JiJ 150 is formed on the top surface of 4.

The bottom plate can also be fixed using 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,
You can also install a device that constantly cleans the water by emitting a jet of water and circulating the water. Furthermore, the bottom plate 162 may also be provided with a plurality of small circular holes 163, for example, and air may be introduced into the bathtub to produce bubbles.

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 dovetail groove 174 having a trapezoidal cross-section and a tapered shape 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 188 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 trapezoidal cross-section dovetail groove 18B on one side. In addition, when the second unit material 186b having dovetail grooves 188 on one side and the other side is positioned second from the end, the second unit material at the end has dovetail grooves 188 on one side. Instead of the second unit member 189 having only the dovetail groove 184, a second unit member having only the dovetail groove 184 on one side thereof may be used.

The side wall member 192 shown in FIG. 29 includes a plurality of second unit members 196 having finger-shaped grooves 194 on one side and the other side, and a finger-shaped m l 94 on only one of the second unit members 196.
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 having a trapezoidal cross section and a dovetail groove 20 having a trapezoidal cross section only on one of them.
It is formed by joining the second unit member 209 having 6 and 6.

The side wall member 212 shown in FIG. 31 includes a plurality of second unit members 218 having a groove 214 with a 7-shaped cross section on one side and a convex portion 216 with a 7-shaped cross section on the other side, and a second plurality of unit members 218 with a 7-shaped cross section on one side. a second unit member 218a having only a convex portion 216;
It is formed by joining a second unit member 218b having only a groove 214 with a V-shaped cross section to one side thereof.

32 to 37 are principal part plan views showing other examples of hollow substantially cylindrical columns for manufacturing joint members.

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, as shown in FIG. 42, this tightening forming machine 500 includes a rectangular body 501, and guides in the longitudinal direction of the upper side walls 502, 502 of the body 501: a505, 50.
5 is formed, and a sliding body 506 is slidably fixed to the guide groove 505.505. A circular spiral is cut into the body of the sliding body 506, and a disc-shaped locking member 507 is screwed onto the upper part of the body so that a wire lobe 516 as a tightening device can be locked therein. A groove 507a for hanging and rotating the wire lobe 516 is formed around the outer periphery of the open pin 507.

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 503 of the body 501 via a radial bearing. 514 is a handle (not shown) used when rotating the spiral rod 511
It has a polygonal head for inserting.

515a and 515b are rod-shaped pins as attachment members for attaching one end of the wire rope 516;
The eight bins 515a and 515b are attached to the rear end 5 of the fuselage 501.
04, and is formed to be able to move up and down.

The distance between the left and right pair of pins 515a and the bin 515b is determined by the diameter of the circle formed by the bottom of the groove 507a of the Hibari bin 507, in order to hang the wire rope 516 as described later. Assuming that the width is the width of the wire rope 516, which is approximately three times the diameter of the wire rope 516, the wire rope 1516 is divided into left and right sections by the open pins 507.
are wrapped approximately in parallel around the object to be tightened, and the pin 5
15a, 515b.

In addition, the positions of the holes 504a and 504b are such that the center of the disc-shaped open pin 507 is located on the extension line that divides the line connecting the left and right holes 504a and 504b into three equal parts, and 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 pins 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 pins 515a and 515b. and place the wire rope 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.

After that, the wire rope 1516 is wound once around each assembled unit member 602, and 51 of the wire rope 516
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 with the wire rope 516, each unit material 602
is firmly adhered.

[Brief explanation of the drawing]

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 the joint member. FIG. 11 is a plan view showing a state in which dovetail grooves are formed in the joint member shown in FIG. 10. 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. 14 is a perspective view of a main part showing a side wall member formed by assembling the second unit members shown in FIG. 13. FIG. 15 is a plan view showing a state in which dovetail grooves are formed on the side wall member. 16 to 19 are explanatory diagrams showing another method of manufacturing the joint member shown in FIG. 10. FIG. 20 is a plan view showing a state in which dovetail grooves are formed in 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 hollow substantially cylindrical columns for manufacturing joint members. 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, 32.34, 36.
38 is a joint member, 51 is a dodecagonal column, 51' is a hollow substantially cylindrical column, 52 is a second unit member, 53 is a joint end surface,
54 is a grooved line, 55 is a convex line, 62.74 is a dovetail groove, 71 is a raw material, 72.72a, 72b is a second unit material, 76.82
indicates an ant. Patent Applicant Amino Tekko Co., Ltd. Agent Patent Attorney Oka 1) Zen Kei Figure 12 Figure 13 Figure 15 Figure 21 Figure 22 Figure 23 Figure 17 Figure 19 Figure 16 Figure 24 Figure 25 Figure 20 Figure 11t) Figure 38 Figure 39 Figure 40 Figure 41 Figure 32 Figure 42

Claims (1)

[Scope of Claims] 1. A cylindrical side body formed by butting and bonding a plurality of side wall members each having opposing end surfaces and a plurality of curved joint members connecting the side wall members, and and a bottom plate fixed to the bottom portion of the side body, and the joint member is formed by abutting and gluing together a plurality of unit members each formed by cutting an end face of a material to form a joint end face at an appropriate angle. A wooden bathtub formed into an arched column. 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. A method for manufacturing a wooden bathtub, comprising the steps of: forming a side shell by butting and gluing the same, and fixing a bottom plate to the bottom part of the side shell.