JP3375273B2 - Structure cylinder and simple bathtub using the same - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure body cylinder including an outer bag having a rectangular upper side left and right corners formed in a corner cut shape, and an inner bag housed in the outer bag. Regarding a simple bathtub using.

[0002]

BACKGROUND OF THE INVENTION As shown in FIG. 8, a simplified bathtub 8 generally comprises a bottom member 82 and four side wall members 81 which are structural bodies. The upper left and right corners of each side wall member 81 are
For the safety of the bather, it is formed with a corner cut (that is, rounded). Here, although not shown, the side wall member 81 is composed of a non-stretchable outer bag and an airtight inner bag housed therein.

In order to form the inner bag in a shape corresponding to the shape of the outer bag, a method of fusion-bonding the periphery of two sheets having a predetermined shape in a state of worship (hereinafter referred to as "daughter striking"). It has been known. With this method, it is easy to form the upper left and right corners into a corner cut shape. However, the strength of the fusion-bonded portion when the air is injected into the inner bag is about 50 to 60% of the strength of the non-fusion-bonded portion. For this reason, in the inner bag whose periphery is fusion-bonded by hitting, there is a disadvantage that cracks and sheets are likely to break.

A method called "overlapping striking" is also used for fusion-bonding sheets by using high frequency, which gives greater strength than the hit-strike. Overlapping is a method of arranging the sheets so that the overlapping surfaces of the edges of the sheets are parallel to the direction in which the stress is applied, and fusing the sheets. It can be 95%. However, since the electrode for fusing needs to be placed on the inner side of the inner bag in the double punching, the entire periphery of the inner bag cannot be fused by double punching.

Therefore, the applicant of the present application has proposed a technique for preventing the disadvantage that a large force is applied to the fusion-bonded portion by hammering and improving the durability of the inner bag (see JP-A-8-26298). ). When this method is applied to form the upper left and right corners of the inner bag into a corner-cutting shape, first, the edges of the upper and lower sides of one sheet are melted by overlapping punching and the left and right communicate with each other. Make a shape. Then, the openings on both the left and right sides of the tubular body are fused by striking. Then, the upper left and right corners are folded into a corner-cut shape, and the left and right sides are further folded by a predetermined width.

FIG. 9 shows a state before the left and right sides of the inner bag 9 produced as described above are folded (the upper left and right corner portions 91, 91 are folded into a corner cut shape). In FIG. 9, the folding lines on both left and right sides are indicated by LL '. Further, the fusion-bonded portions by overlapping and witness are shown by the reference numerals 93 and 94, respectively, and the front surface and the rear surface of the inner bag 9 are shown by the reference numerals 95 and 96, respectively. However, in this method, when the structure body is used, the inner bag 9 is displaced in the outer bag, the shape of the whole body is distorted, or an unexpected stress is applied to a part of the inner bag 9 to cause cracks. There is a risk of tearing.

Fusing the bent portions 91 at the corners of the inner bag 9 to a predetermined portion of the front surface 95 of the inner bag 9 (see K in FIG. 9) means that the hand of the inner bag 9 is adjusted as shown in FIG. Front 9
5 is joined to the rear surface 96, and abnormal stress is applied to the fused portion when air is injected, which is not practical. Further, it is not practical to insert the electrode into the inner bag 9 and fuse the bent portion 91 only to the front surface 95 of the inner bag 9 because it takes time and labor. Further, a method of joining the bent portion 91 to the surface of the inner bag by a method other than fusion bonding is conceivable, but it is impractical because the manufacturing process becomes complicated because an adhesive agent must be used. Moreover, all of these methods are far from practical use because cracks and tears are likely to occur at locations where air is injected (see K in FIG. 9).

[0008]

DISCLOSURE OF THE INVENTION The present invention has been proposed to solve the above problems, and uses a structure body cylinder that does not shift in the outer bag even when the inner bag is folded, and uses the structure body cylinder. It is to provide a simple bathtub. Another object of the present invention is to have an inner bag in which air leakage due to cracking or tearing does not occur even when the inner bag is bent and the bent portion is joined to the inner bag by using a fusing means. An object is to provide a structure body and a simple bathtub using the same.

[0009]

SUMMARY OF THE INVENTION The present invention is applied to a structure body cylinder including an outer bag having rectangular upper left and right corners formed in a corner cut shape, and an inner bag accommodated in the outer bag. . In particular,
The structure body of the present invention is used as a side wall member of a simple bathtub. According to the present invention, the inner bag has a first side formed by stacking fusion welding or witness fusion welding parallel to the upper and lower sides or the left and right sides.
The seal portion is provided, and the second seal portion is formed along the respective sides at a position separated by a predetermined width from the edges of the two sides perpendicular to the side where the first seal portion is provided. It is composed. Usually, the first seal portion is formed by stacking and welding in parallel with the upper and lower sides. In this case, the second seal portion is provided parallel to both left and right sides.

Here, at least one of the upper left and right corners of the inner bag is so arranged that the second seal portion includes a folding line.
The side that is folded into a corner cut and provided with the second seal portion is folded along each side with a width that is larger than the distance between the edge and the seal portion. At this time, an air non-injection portion and an air injection portion are formed in the folded portion of the corner portion. In the present invention, the inner bag corner, air uninjected part of <br/> tatami Mareta portion folding the corner cutting shape, the second seal portion provided
An air non-injection portion of the folding along the sides tatami Mareta part of the side that is is engaged. Therefore, even if the locking portion is damaged, there is no danger of air leakage in the inner bag.
Further, since the inner pressure of the inner bag is not directly applied to the air injection portion of the folded portion on the second seal portion side of the inner bag, there is no risk of air leakage from the seal portion of the folded portion.

In the present invention, the locking of the air non-injection portion of the folded portion of the upper corner portion and the air non-injection portion of the folded portion of the side on the side of the second seal portion may be performed by fusion by high frequency. It can be done, or it can be done by a detachable locking means such as a hook. The inner bag does not necessarily have to be composed of one sheet, but when the hanging cloth can be installed in the inner bag, for example, the inner bag is composed of two sheets,
It is also possible to easily attach the hanging cloth.

Further, the outer bag can be provided with a storage port which can be opened and closed by a fastener, a hook or the like so that the inner bag can be put in and taken out. This facilitates maintenance and replacement of the inner bag. In the present invention, locking means for attaching and detaching the inner bag to the outer bag may be provided on the outer surface of the inner bag and the inner surface of the outer bag. As a result, the inconvenience that the inner bag is displaced inside the outer bag does not occur. As the locking means, a hook, a sheet fastener or the like can be used. For example, a male hook is attached to the outer surface of the inner bag, and a female hook is attached to the inner surface of the outer bag. By putting the inner bag in the outer bag and engaging both with a hook or the like, the inner bag is held in the outer bag without being displaced.

[0013]

EXAMPLE An example of the structure body used as the side wall member 81 of the simple bathtub 8 shown in FIG. 8 will be described with reference to the drawings. First, a method of manufacturing the inner bag 10 of the structure body will be described with reference to FIGS. As shown in FIG. 1, a single inner-bag sheet is folded in half and the upper and lower edges are overlapped and high-frequency fused to form the first seal portion 16, and the left and right communicating cylinders communicate with each other. Make a shape. As the inner bag sheet, an appropriate sheet made of PVC (polyvinyl chloride resin), PVC tarpaulin, or a composite of these is used.

At this time, an appropriate number of hanging cloths (2 in this embodiment) are used.
And the hook elements 22a and 22b which form the two reference numerals 251 and 252) and which can be engaged with each other when the inner bag 10 is folded are attached to the left and right lower corners and to the inside by fusion bonding. Here, the respective hook elements 22a at the lower left and right corners are attached so that the front surface 23 and the rear surface 28 of the inner bag sheet are fused, and the hook elements 22b located inside the respective hook elements 22a are
It is attached so as to be fused only to the front face 23. Further, the injection / exhaust plug 26 and a hook element 27 that engages with an outer bag described later are also attached so as to be fused only to the front face 23.

Thereafter, as shown in FIG. 2, the edges of the left and right sides are welded together by hammering while leaving the opening 13 (this fused portion is indicated by reference numeral 18), and from the fused portion 18. A second seal portion 17 is formed at a position separated by a predetermined width along both the left and right sides by staking and fusion bonding. Thereby, the air non-injection portion 19 having the opening portion 13 and the seal portion 1
An air injection portion closed by 6 and 17 is formed. In FIG. 2, the air non-injection portion 19 communicates with the outside air through the opening 13, but the fusion bonding portion 18 may be formed so that the opening 13 is not provided. In this case, the left and right sides of the inner bag can be doubly sealed by the sealing portion 17 and the fusion bonding portion 18.

Next, as shown in FIG. 3, the upper left and right corner portions of the inner bag are folded along the line MM 'shown in FIG. 2 (hereinafter, this folded portion will be referred to as "first folded portion"). part"
, And indicated by the reference numeral 11). In this embodiment, the first folding portion 11 is formed by folding the back surface 24 of the inner bag so that it can be seen on the front side as an isosceles triangle having the hypotenuse 14 as the base.

Next, the left and right sides of the inner bag are N- shown in FIG.
Bending along N '(hereinafter, this folded portion is referred to as "second folded portion"), the seal portion 17 and the fusion bonding portion 1
8 and the air non-injection portion 19 near the opening 13 of the first folded portion 11 (see FIG. 3).
And is indicated by the reference numeral 28 in FIG. FIG. 4 shows the inner bag 10 made in this way. In FIG. 4, a fusion bonding portion between the air non-injection portion 19 and the air non-injection portion 28 described above is indicated by reference numeral 15. Further, a state is shown in which the air injecting portion 20 is formed in the second folded portion 12 by being separated from the air non-injecting portion 19 by the seal portion 17.

In the inner bag 10 shown in FIG. 4, when the air is injected into the inner bag 10, the shape and dimensions of the folded portions 11 and 12 correspond to the shape of the outer bag 30 (see FIG. 5 described later). It has been decided. The angle of the hypotenuse 14 of the first folding part 11 is such that when air is injected into this part,
The outer bag 30 is set to bulge into a shape that can correspond to the curved portion 33 (see FIG. 5 described later).

FIG. 5 shows an outer bag 30 in which the inner bag 10 shown in FIG. 4 is accommodated. The inner bag 10 has a front surface 23
Comes into contact with the rear surface of the outer bag 30, and the rear surface 24 of the outer bag 3
It is housed in the outer bag 30 so as to come into contact with the front surface 31 of the hand. The outer bag 30 is obtained by folding an outer bag sheet into two, and has a curved portion 33 in which the left and right corners of the upper side (folded side) of the rectangle are rounded off. It is preferable to use a non-stretchable material as the outer bag sheet, for example, a synthetic resin sheet such as nylon or polyester, or a laminated sheet of this synthetic resin sheet and a cloth material (woven cloth, non-woven cloth, etc.). Can be used.

The outer bag 30 is fusion-bonded at a high frequency, with the periphery of the outer bag 30 left (the fusion-bonded portion is indicated by reference numeral 36). Further, an openable / closable storage port 32 for storing the inner bag 10 is provided on the front surface 31 of the outer bag 30. The accommodation port 32 can be opened and closed with a fastener, a hook, a tape fastener, or the like. The shape of the accommodation port 32 is shown in FIG.
The shape may be a straight line as shown in FIG.

Since the outer bag 30 shown in FIG. 5 is provided with a storage port 32 that can be opened and closed, the user can replace the inner bag 10 shown in FIG. 4 by himself if a new inner bag is ordered. it can. Once the inner bag 10 is placed in the outer bag 30, it is usually not necessary to remove it. Therefore, each side of the outer bag 30 may be sealed in the manufacturing process without providing the accommodation port 32 and with the inner bag 10 inside. In this case, when the inner bag 1 is damaged and needs to be replaced, the entire simple bathtub is sent to the factory, the outer bag 30 is cut open, a new inner bag 10 is inserted, and then this is sealed.

Further, in FIG. 5, the front surface 3 of the outer bag 30 is shown.
A hook element 34 is provided on the inner surface side of 1 at a position corresponding to the hook element 27 of the inner bag 10 shown in FIG. 4.
When the inner bag 10 shown in FIG. 4 is accommodated in the outer bag 30 shown in FIG. 5, the hook elements 27 and 34 are engaged with each other, so that the inner bag 10 is substantially fixed in position inside the outer bag 30. Can be held at. In addition, in FIG. 5, the outer bag 30
On the front surface 31 of the hand, the injection / exhaust plug 26 of the inner bag 10 shown in FIG.
An injection / exhaust plug hole 35 is provided at a position corresponding to.

6 and 7 show the inner bag 10 shown in FIG.
FIG. 6 is a cross-sectional view (a cross-sectional view corresponding to AA ′ and BB ′ in FIG. 4) in the case where the air bag is accommodated in the outer bag 30 illustrated in FIG. 5 and air is injected. 6 and 7, the inner bag 1
The front face 23 and the rear face 24 of 0 are hanging cloths 251 and 252.
(Only the hanging cloth 251 is shown in FIG. 6, and the hanging cloth 25 is shown in FIG.
2 are only shown). In addition,
Needless to say, the number and shape of the hanging cloths or the installation direction are not limited to the present embodiment. As shown in FIG.
When air is injected into the inner bag 10 from the injection / exhaust plug 26 provided in the outer bag 30, the inner bag 10 can maintain a relatively flat plate shape. In addition, as shown in FIG. 7, a hook element 22a provided on the air non-injection portion 19 of the second folding portion 12 and a hook element 22b provided at a corresponding position on the front surface 23 of the inner bag 10 are shown. Has been done.

Air injecting portion 20 of second folding portion 12
Is the air injection portion 2 of the unfolded portion of the inner bag 10.
It communicates with 7. Since the inner bag 10 is used by being housed in the outer bag 30, the second folded portion 12 is pressed against the inner surface of the outer bag 30 due to the swelling of the air injecting portion 27, so that the air injecting portion 20 is almost free of the air injecting portion 20. Air does not enter.

The air non-injection portion 2 of the first folding portion 11
8 is overlapped on the lower side of the air non-injection portion 19 of the second folding portion 12, and these two air non-injection portions 19 and 28 are joined to each other by fusion bonding to form the locking portion 15. ing. The locking portion 15 is the front surface sheet 2 of the inner bag.
3 is not joined. That is, since the air non-injection portion 19 of the first folded portion 11 is joined to the air non-injection portion 28 of the second folded portion 12, even if a crack occurs in this joint portion, air leakage does not occur. Absent.

In the above embodiment, the structure body cylinder in which the upper left and right corners have a corner cut shape has been described.
The present invention can also be applied to a structure body cylinder in which only one of the right and left corners has a corner cut shape. In this case, it is needless to say that the number of the first folds at the corners of the upper side of the inner bag is one, and the corresponding corners of the outer bag are formed in the corner cut shape. Further, in the above-mentioned embodiment, after performing the processing by stacking and welding in parallel to the upper and lower sides of the inner bag, the left and right sides are pour and fused, and then the upper left and right corners and the left and right sides are cut into corners. However, instead of this, after performing the process by stacking and fusing in parallel to the left and right sides of the inner bag, the upper and lower sides are struck and fused, and then the upper left and right corners and the left and right sides are rounded. It may be bent into a cut shape. Further, in the above-mentioned embodiment, the upper and lower sides of the inner bag are overlapped and welded in parallel, but this may be done by hammering. In this case, the hitting seal portion is provided close to the upper and lower sides, and the side is bent.

[0027]

EFFECTS OF THE INVENTION The structure body of the present invention does not shift in the outer bag even when the inner bag is folded, and when the inner bag is bent, the bent portion is fixed by using the fusion means.
Even contact engagement, the air-filled part does not occur air leakage due to cracking or breaking is particularly suitable for simple bath.

[Brief description of drawings]

FIG. 1 is a diagram showing a process of manufacturing an inner bag of a structure body of the present invention used as a side wall structure member of a simple bathtub, showing a state in which an inner bag sheet is formed into a tubular shape. .

FIG. 2 is a diagram showing a manufacturing process of an inner bag of a structure body of the present invention used as a side wall structural member of a simple bathtub, in which both right and left sides of the tubular inner bag sheet of FIG. 1 are sealed. It is a figure which shows a state.

FIG. 3 is a diagram showing a manufacturing process of an inner bag of a structure body of the present invention used as a side wall structure member of a simple bathtub, in which the left and right sides of the upper side of the inner bag sheet having both left and right sides sealed in FIG. It is a figure which shows the state which folded the corner part.

FIG. 4 is a view showing a completed state of the inner bag of the structure body of the present invention used as a side wall structure member of a simple bathtub.

5 is a view showing an outer bag in which the inner bag of FIG. 4 is housed.

6 is a cross-sectional view taken along the line AA ′ of the inner bag shown in FIG.

7 is a cross-sectional view of the inner bag shown in FIG. 4 taken along the line BB '.

FIG. 8 is a perspective view showing an example of a simple bathtub in which the structure body is used as a side wall member.

FIG. 9 is a view showing a state in which the upper left and right corner portions of the inner bag of the conventional structure body are bent.

10 is a diagram showing a problem of the inner bag of the conventional structure body of FIG.

[Explanation of symbols]

10 inner bag 11 First folding part 12 Second folding part 13 openings 14 The hypotenuse of the first folding part 15 Locking part 16,17 Seal part 18 Fusion part 19 Air non-injection section 20,27 Air injection part 22a, 22b, 27, 34 hook elements 23 Front side of inner bag 24 Back of inner bag 251,252 hanging cloth 26 Injection exhaust plug 28 Air non-injection section 30 outer bag 31 Front of hand in outer bag 32 accommodation 33,34 Curved parts on the upper left and right sides of the outer bag 35 Injection exhaust plug hole

Claims (5)

(57) [Claims] 1. A structure body cylinder comprising an outer bag in which at least one of right and left corners of a rectangular upper side is formed in a corner cut shape, and an inner bag accommodated in the outer bag, wherein the inner bag Is provided with a first seal portion formed by stacking fusion welding or witness fusion fusion parallel to the upper and lower sides or the left and right sides, and is perpendicular to the side on which the first sealing portion is provided.
A position apart a predetermined width from the side of the edge, the second seal portion is provided by Ogamiuchi fused along each side, a corner portion of the outer bag which is formed in the corner cutting shape of the inner bag The second corner of the upper corner corresponding to the fold line
The side that is folded into a corner cut shape so as to include the second seal portion formed by the above-mentioned hitting and fusion bonding has a width that is larger than the distance between the edge and the second seal portion, and along folded, and the inner bag corners, and air non-injection portion of the folded Mareta portion in a corner cut shape, the sides and the second seal portion is provided
Structure for kidou the overlapping portion of the air uninjected part of folded Mareta portion along the side is locked, it is characterized. 2. The inner bag is a corner cut shape of the inner bag corner portion.
An air non-injection portion of the folded Mareta part, locking of the overlapping portion of the air uninjected portion of the sides folded Mareta portion along the sides the second seal portion is provided, fusion The structure body cavity according to claim 1, wherein 3. The structure body cylinder according to claim 1, wherein the outer bag has a storage port that can be opened and closed for inserting and removing the inner bag. 4. The structure air according to claim 1, wherein locking means for attaching and detaching the inner bag to and from the outer bag are provided on the outer surface of the inner bag and the inner surface of the outer bag. Torso 5. A simple bathtub using the structure body according to any one of claims 1 to 4 as a side wall structure member.