JPH0345387B2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a balloon-like structure,
In particular, it relates to a balloon-like structure that is filled with pressurized fluid, maintains a certain shape, and can change its external shape by applying an external force. The present invention relates to a balloon-like structure that can be expanded from a bent state by pulling a string.

(Prior Art) Generally, when manufacturing a structure, a rigid body is used as the material. However, if a rigid body such as metal or resin is used as the material, if the structure is large, scaffolding or supports will be required for its manufacture and installation, which will incur additional costs. increases.

Furthermore, since the structure is heavy, it is extremely troublesome to transport it.

Moreover, when said structures are installed especially for decorative, advertising, etc. purposes, their installation period is relatively short - i.e. their installation, dismantling and transportation operations can be carried out within a relatively short period of time. Since it has to be repeated, the cost required for the decoration, advertising, etc. becomes enormous.

Furthermore, when configuring such a structure so that it can be moved in part or in its entirety, it requires a large-capacity drive source and a large-scale drive mechanism, which makes the structure extremely difficult to move. It is expensive, and its adjustment and maintenance are also difficult. Furthermore, in order to move a large and heavy structure, it is dangerous to approach the structure during operation.

In view of the above, the inventor of the present invention fabricated the outline (external shape) of the structure by sewing the structure using materials such as cloth and film, and fabricated the structure using pressurizing means such as a blower. By increasing the pressure inside the main body higher than atmospheric pressure, the main body is inflated into a balloon shape to shape the external shape of the structure, and further, by arranging a simple driving means inside the structure, They have already devised a balloon-like structure that can move part or all of the structure.

The above-mentioned invention is described in Japanese Utility Model Application Publication No. 54-124490 and Japanese Utility Model Application Publication No. 56-117788.

In the above-mentioned Japanese Utility Model Publication No. 56-117788, an operating string fixed above the bending position inside the balloon-like structure is used as a driving means for moving a part or the whole of the balloon-like structure. Then, by applying a force in only one direction to the balloon-like structure using the operating string, the balloon-like structure is bent from the constantly extended state, and by removing the force, the balloon-like structure is returned to the original extended state. This is how the balloon-like structure is constructed.

(Problems to be Solved by the Invention) The above-described conventional techniques had the following problems.

When a balloon-like structure is applied to a decorative or advertising structure, a technique for moving part or all of the balloon-like structure is often required.

In this case, when using a means for applying force in only one direction, such as an operating string, as a driving means for the balloon-like structure, it is necessary to use the technique of bending the balloon-like structure from a state in which it is constantly stretched as described above. else,
In some cases, it may be necessary to use the above-mentioned means to extend the body from a constantly bent state.

However, there has never been a technique to extend the balloon-like structure from this constantly bent state, and the development of such a technique has been desired.

The present invention has been made to satisfy the above-mentioned needs.

(Summary of the Invention) The present invention provides an allowance for creating a bent portion in the body of the balloon-like structure on the same side as the direction of extension of the structure, and By making the length of the slack part longer than 1/2 of the outer circumference of the structure, it is possible to reliably hold the structure in a bent state under normal conditions, and furthermore, the balloon-like shape of the structure can be maintained reliably. When the structure is expanded by an external force, the decrease in internal volume can be relatively suppressed, so the expansion can be performed at a large angle and with a small force. It is characterized by the fact that

(Example) The present invention will be described in detail below with reference to the drawings.

FIG. 1 is a schematic side view of the first embodiment of the present invention, and FIG. 2 is a schematic side view of the balloon-like structure shown in FIG. 3
The figure is a schematic plan view of Fig. 2, and Fig. 4 is a schematic plan view of Fig. 3.
Schematic sectional view taken along line C, Figure 5 is K in Figure 4.
6A and 6B are developed views of the balloon-like structure shown in FIGS. 1 to 5, FIG. 6A is a developed view of the main body 12, and FIG. Cloth 14
FIG.

In addition, in FIGS. 1 to 4, air holes 2 formed in the base 2 by means not shown are shown.
Air is sent into the balloon-like structure 11 from A in the direction of arrow A, and the balloon-like structure 11
The contour shape (in this case, a bent cylindrical shape) is shaped.

Furthermore, the seam 11A of the balloon-like structure 11 shown in FIG. 2 is omitted in FIGS. 1, 3, and 4. Furthermore, in FIG. 6A, the main body 12
The suture allowance required for sewing is omitted.

Now, in each figure, the balloon-like structure 11
The main body 12 and the extra cloth 14 are made of cloth coated with resin or the like. As is clear from FIG. 6A, when the main body 12 is sewn into a cylindrical shape,
An opening 13 is formed in the circumferential direction and with a length exceeding 1/2 of the circumference.

The opening 13 is depicted as having a certain width in FIGS. 2, 4, 5, and 6A. It is not particularly limited to this,
It may be just a cut.

The balloon-like structure 11 is formed by sewing a main body 12 into a cylindrical shape and sewing an extra fabric 14 shown in FIG. 6B into the opening 13 of the main body 12. The margin cloth 14 has a margin portion 14 having a boat bottom shape.
B, and a suture margin 14A, which is sewn into the opening 13 of the main body 12.

In addition, in each figure, the extra cloth 14 is fixed to the inside of the main body 12, but it may be fixed to the outside of the main body 12.

An end of the balloon-like structure 11 is fixed to a base 2 in which an air hole 2A is formed. In addition, the main body 12
A fitting 3 is fixed to the inner side of the sewing machine and on the tip side of the part where the extra fabric 14 is sewn, and
An operating string 4 is fixed to the fixture 3.

Although the air is constantly blown, the pressure inside the balloon-like structure 11 is kept constant because the air leaks from the seam 11A of the balloon-like structure 11.

Now, as mentioned above, the opening 13 is located in the main body 1.
In other words, as shown in FIG. Since it is arranged on the side opposite to the opening 13 with respect to the center line L of the surface, in other words, the length of the allowance part 14B of the allowance cloth 14 in the plane perpendicular to the axial direction of the balloon-like structure is ,
Since the length of the outer periphery of the balloon-like structure is selected to be larger than 1/2, the balloon-like structure 11 is bent as shown in FIG. 1 by the air blowing.

Here, when the operating string 4 fixed to the fixture 3 inside the balloon-like structure 11 is pulled in the direction of arrow B, the second
As shown in the figure, the slack cloth 14 slackens, and the balloon-like structure 11 extends in the direction of arrow D using both ends E of the opening 13 as fulcrums.

In this case, the opening 1 of the balloon-like structure 11
The volume of the balloon-like structure 11 on the side opposite to the margin cloth 14 from both ends E of the opening 13 decreases. It increases by the amount that the opposing part stretches.

As a result, the degree of decrease in volume of the balloon-like structure 11 from the state before expansion to after expansion does not become very large, so that the increase in pressure inside the balloon-like structure 11 during expansion can be suppressed to a relatively small amount.

Therefore, by only applying a small force to the operating string 4, the balloon-like structure 11 can be expanded. Moreover, the angle of the elongation can also be made relatively large. Furthermore, since there is little change in the volume of the balloon-like structure 11, the appearance of the balloon-like structure and the impression given to the audience are also good.

FIG. 7 is a schematic side view of a second embodiment of the invention. In Figure 7, the same symbols as in Figure 1 are
Represents the same or equivalent parts.

In FIG. 7, two extra fabrics 24A and 24B are sewn into the opening 13 provided in the main body 12. The extra fabrics 24A and 24B are extra fabrics having a boat bottom-shaped extra portion as shown in FIG. 6B.

In this way, when a balloon-like structure is constructed using two or more extra fabrics, the outline of the extra fabric portion of the balloon-like structure when bent becomes a polygon, close to an arc.

Therefore, assuming that the positions of both ends E of the opening 13 are the same, in the second embodiment of the present invention, the balloon-like structure is constructed using only one piece of extra fabric. Compared to the example, the degree of volume reduction of the balloon-like structure 21 during expansion is further reduced.

Therefore, the balloon-like structure 2 can be
1 can be extended, and the outer shape of the balloon-like structure 21 when bent becomes even better.

8 and 9 are schematic side views of a third embodiment of the invention. More specifically, FIG. 8 is a side view showing the state in which the balloon-like structure 31 takes its shape when internal pressure is applied, and FIG. 31 is a side view showing the extended state. FIG. In each figure, the same reference numerals as in FIGS. 1 and 7 represent the same or equivalent parts. Further, 31D is a seam.

According to the third embodiment of the present invention, the same effect as using the extra fabric described in the first and second embodiments can be obtained without using the extra fabric.

That is, the balloon-like structure 31 shown in FIG. 8 and FIG.
B, 31C is formed by sewing together the second and third main body constituent fabrics 3.
1B and 31C are cut so that the portion corresponding to the excess cloth is integrated with the cloth constituting the main body.

In the following description, cutting the portion corresponding to the excess cloth so as to be integrated with the cloth constituting the main body is referred to as three-dimensional cutting. In addition,
In FIG. 10, the suture allowance is omitted.

Among the first to third main body constituent cloths 31A to 31C shown in FIGS. 10A to 10C, the first main body constituent cloth 31A is a fully developed view of the balloon-like structure 31 which forms a cylindrical shape when standing upright. It is approximately 1/2 the size of

The first main body constituent cloth 31A
End E shown in Figures and Figure 7 (fulcrum point of bending E)
It is provided with a notch 39A having a fulcrum F corresponding to . the second and third main body constituent cloths 31B;
31C are symmetrical to each other and, as described above, are provided with an allowance portion 38 corresponding to an allowance cloth.

Further, the second and third main body constituent cloths 31
B, 31C are the first main body constituent fabrics 3 during sewing.
A protrusion 39B is provided so as to be able to fit into a notch 39A formed in 1A. The margin portion 38 is substantially fan-shaped with the portion of the protrusion 39B corresponding to the fulcrum F as the center.

The first to third main body constituent fabrics 31A to 31C shown in FIGS.
Among the parts indicated by , the parts indicated by the same reference numerals are sutured to each other, thereby forming the balloon-like structure 31 .

This third embodiment is used in normal times - that is, in the eighth
When it is bent as shown in the figure, wrinkles occur in the portion facing the margin 38, but the outline of the vertical section of the margin 38 is not a part of the polygon, but is curved as a whole. Since it will be expressed as
Looks very good.

Note that the characteristics of each main body composition cloth shown in FIG. 10 are as follows:
The main feature is that it is integrally provided with a margin.

Therefore, other changes and improvements may be made, such as changes in the numbers 32 and 3 of the second main body fabric 31B.
3 and the straight line portions 36 and 37 of the third main body fabric 31C starting from point F of the protrusion 39B, i.e.,
Second and third main body constituent cloths 31B, 31C
is formed to be thick so that no protrusion 39B is formed, and the width of the first main body constituent fabric 31A is narrowed by the pair of notches 39A, so that the notches 3
Changes such as preventing 9A from being formed;
Improvements may be made completely freely.

FIG. 11A is a schematic side view of the fourth embodiment of the present invention, and FIG. 11B is a schematic diagram showing a state in which the operating string 4 shown in FIG. 11A is pulled and the balloon-like structure 81 is expanded. It is. In each figure, the same reference numerals as in FIG. 1 represent the same or equivalent parts.

The fourth embodiment of the present invention is a modification of the first embodiment.

As is clear from FIG. 11A, a plurality of extra fabrics 14 (two in the illustrated example) are arranged in the balloon-like structure 81 so that their axial positions are different. Then, when the attachment 3 fixed to the inner wall of the main body 82 is pulled using the operating string 4, the balloon-like structure 81 is expanded as shown in FIG.

In this way, by arranging a plurality of extra fabrics 14 in succession, the balloon-like structure can be stretched in multiple stages, and the angle from the bent state to the stretched state can be increased.

FIG. 12A is a schematic sectional view of a fifth embodiment of the present invention, and FIG. 12B is a schematic diagram showing a state in which the operating string 4 shown in FIG. 12A is pulled and the balloon-like structure 41 is expanded. be. In each figure, the same reference numerals as in FIG. 11 represent the same or equivalent parts.

The fifth embodiment of the present invention is a modification of the fourth embodiment.

As is clear from FIG. 12, the balloon-like structure 4
As in the fourth embodiment (FIG. 11), a plurality of extra cloths 14 (six in this example) are provided in the first embodiment.

As shown in FIG. 12A, the more extra fabrics 14 are provided, the greater the angle at which they bend when internal pressure is applied. You will be unable to stretch your body.

Therefore, in the fourth embodiment, the balloon-like structure 4
A pulley 90 for winding the operating string 4 is attached to the main body 42 so that the operating string 4 can be arranged substantially along the outline of the balloon-like structure 41 when the operating string 1 is in the bent state. placed on the inner wall.

By arranging the pulley 90 in this manner, the balloon-like structure 41 can be stretched well by pulling the operating string 4, as shown in FIG. 12B. Note that 90 is not limited to a pulley as long as it can be wrapped around the operating string 4, and may be a simple ring, for example.

FIG. 13A is a schematic sectional view of the sixth embodiment of the present invention, and FIG. 13B is a schematic diagram showing a state in which the balloon-like structure 51 is expanded by pulling the operating string 4 shown in FIG. 13A. It is. In each figure, the same reference numerals as in FIG. 12 represent the same or equivalent parts. Further, 51D is a seam.

The sixth embodiment of the present invention is a modification of the fifth embodiment (FIG. 12).

As is clear from FIG. 13, the balloon-like structure 5
In No. 1, by sewing the three-dimensionally cut fabric constituting the main body, substantially the same effect as provided by providing a plurality of extra fabrics can be obtained without providing a plurality of extra fabrics.

FIG. 14 shows the balloon-like structure 5 shown in FIG.
FIG. 1 is a developed view of each main body constituent fabric of No. In FIG. 14, the same reference numerals as in FIG. 13 represent the same or equivalent parts. Further, the stitching margins necessary for stitching the respective main body fabrics are omitted in FIG. 14.

First, the first main body constituent cloth 51A shown in FIG. and a portion having a smaller dimension Y.

The second and third body-constituting fabrics 51B and 51C shown in FIGS. 14B and 14C are curved symmetrically with respect to each other, and are provided with an allowance portion 58 corresponding to an allowance fabric.

The first to third main body constituent fabrics 51A to 51
In C, portions indicated by the same reference numerals among the reference numerals 52 to 54 have the same length and are sewn together. Then, the balloon-like structure 51 is formed by the suturing.

If the balloon-like structure 51 is fixed to the base 2 and air is sent into the balloon-like structure 51 from the air hole 2A, the balloon-like structure 51 will curve as shown in FIG. 13A. shape its outline.

Then, when the operating string 4 is pulled in the direction of arrow B, the balloon-like structure 51 expands using the pair of linear portions 52 and 54 as fulcrums, as shown in FIG. In other words, the balloon-like structure 51 is
A plurality of bending fulcrums 52 and 54 are continuously provided.
It can be said that it has a margin 58 having a margin 58, which bends and extends with the fulcrums 52 and 54 as boundaries.

FIG. 15A is a schematic sectional view of the seventh embodiment of the present invention, and FIG. 15B shows the balloon-like structure 61 in a state where the balloon-like structure 61 is expanded by pulling the operating string 4.
FIG. In each figure, the 12th
The same reference numerals as in the figures represent the same or equivalent parts.

The seventh embodiment of the present invention is a modification of the fifth embodiment.

In the fifth embodiment, the balloon-like structure 41 is
Although it had a cylindrical shape when expanded, in this seventh embodiment, the balloon-like structure 61 has a conical shape.

In FIG. 5A, the fitting 3 is fixed to the tip of the extra fabrics 64A to 64F provided in the plurality of openings 63A to 63F inside the balloon-like structure 61, and the fitting 3 is Operation string 4
is arranged along the inner wall of the main body 62,
When a pulley 90 is fixed to the main body 62 and the operating string 4 wound around the pulley 90 is pulled, the area of the cross section of the portion where the extra cloth is provided is gradually reduced, that is, from the tip. Decompression begins.

That is, when the operating string 4 is pulled in the direction of arrow B, the extra fabric 64A is folded first, then the extra fabric 64B,
The extra fabric is folded one after another, 64C, . . . As a result, the balloon-like structure 61 gradually extends from its tip.

In the balloon-like structure 41 shown in FIG. 12, since all the cross-sectional areas of the excess cloth portions are equal, which of the plurality of excess fabrics 14 is to be folded? In other words, the balloon-like structure Although it cannot be clearly defined from which part of the balloon-like structure 61 the expansion starts, in this seventh embodiment, it is guaranteed that the balloon-like structure 61 gradually expands from the tip. Ru.

FIG. 16 is a schematic cross-sectional view of an eighth embodiment of the present invention. In FIG. 16, the same reference numerals as in FIG. 12A represent the same or equivalent parts.
The eighth embodiment of the present invention is a modification of the fifth embodiment.

In FIG. 16, inside a cylindrical balloon-like structure 71 provided with a plurality of extra cloths 14, two
Two fittings 3A and 3B are fixed. 16th
In the figure, the fixture 3A is fixed to the distal end side of the main body 72 rather than the fixture 3B.

Each of the fittings 3A and 3B has an operating string 4.
A and 4B are fixed. The operating strings 4A, 4B are wound around a pulley 90 along the inner wall of the main body 72, as described above with reference to FIGS. 12, 13, and 15.

In the eighth embodiment of the present invention having the above configuration, if each operating string is pulled at different timings, for example, if the operating string 4B is pulled before the operating string 4A, the operating string 4B is pulled before the attachment 3A. Mounting tool 3B
Since force is applied to the balloon-like structure 71, the balloon-like structure 71 can be reliably expanded from its base side, that is, from the side fixed to the pedestal 2.

In addition, in FIG. 15, two fittings to which operating strings are attached are fixed to the balloon-like structure 71 on which six pieces of extra cloth 14 are provided, but the number of fittings is particularly limited to these. No, it doesn't matter how many pieces there are.

Now, in the above description, the allowance cloth or the allowance part corresponding to the allowance cloth is provided in a cylindrical or conical balloon-like structure, but it is not particularly limited to this.

In other words, there is a cloth inside the balloon-like structure that defines the contour shape when the inside is pressurized.
Alternatively, by providing a string or the like, the balloon-like structure can be made into a shape other than a cylindrical or conical shape, and the present invention may be applied to such a structure.

Furthermore, although the balloon-like structure has been described as having air constantly blown into the inside of the balloon-like structure as indicated by arrow A in each figure, the present invention is capable of increasing the internal volume from the time of bending to the time of extension. Since it is not very large, the balloon-like structure can be stretched and bent well even if the seams are post-processed to make the seams airtight, the internal pressure is made higher than atmospheric pressure, and the balloon-like structure is sealed. be able to. Therefore, the present invention can also be applied to balloons, airships, ad balloons, etc.

In addition, in the above explanation, the main body and extra cloth of the balloon-like structure were assumed to be cloth coated with resin, etc., but they are not particularly limited to cloth, and may be made of a material that does not stretch or contract very much, such as a film. It may be made of other materials.

Furthermore, although the expansion means of the balloon-like structure has been described as being an operating string whose one end is fixed inside the balloon-like structure, it is not limited to this, and may include, for example, a pneumatic cylinder, etc. may be used as the elongation means, or the elongation may be performed by further pressing the outer wall of the structure.

(Effects of the Invention) As is clear from the above description, according to the present invention, the following effects are achieved.

In other words, when a balloon-like structure filled with pressurized fluid is extended from a bent state by applying a force in one direction, the length in a plane perpendicular to the axial direction of the balloon-like structure is , a margin is provided in the portion of the balloon-like structure on the same side as the stretching direction so that the margin is larger than 1/2 of the outer circumference of the cross-section of the balloon-like structure, so that the balloon-like structure can be stretched from at least the bent state. At this time, the rate of decrease in the internal volume of the balloon-like structure, in other words, the increase in internal pressure becomes less large.

Therefore, it is possible to extend the balloon-like structure from the bent state with a relatively small force, and the angle thereof can also be increased.

Further, since a driving means for bending and extending the structure is provided on the tip side of the inner wall of the balloon-like structure main body relative to the portion where the margin portion is formed, the outer wall of the balloon-like structure The bending and extension can be performed without applying any force. Therefore, the appearance of the balloon-like structure is good.

[Brief explanation of drawings]

FIG. 1 is a schematic side view of a first embodiment of the present invention;
Figure 2 is a schematic side view showing the balloon-like structure in Figure 1 extended using the operating string, and Figure 3 is a side view of the balloon-like structure in Figure 1.
4 is a schematic cross-sectional view taken along line C-C in FIG. 3, FIG. 5 is an enlarged view of section K in FIG. 4, and FIGS. FIG. 5 is a developed view of the balloon-like structure, and FIG. 7 is a developed view of the balloon-like structure shown in FIG.
8 is a schematic side view of the third embodiment of the present invention, and FIG. 9 is a diagram showing the balloon-like structure in FIG. 8 when the operating string of the balloon-like structure is pulled and the structure is extended. A schematic side view showing the state; FIGS. 10A, B, and C are developed views of the balloon-like structure shown in FIGS. 8 and 9; FIGS. 11A and B are the fourth embodiment of the present invention. FIGS. 12A and 12B are schematic sectional views of the fifth embodiment of the present invention, FIGS. 13A and B are schematic sectional views of the sixth embodiment of the present invention, and FIGS. 14A, B and C are developed views of the balloon-like structure shown in FIGS. 13A and B, FIGS. 15A and B are schematic cross-sectional views of the embodiment of the present invention shown in FIG. 7, and FIG. It is a schematic sectional view of an 8th example. 4, 4A, 4B, ... operation string, 11, 21, 3
1, 41, 51, 61, 71, 81... Balloon-like structure, 12, 42, 62, 72, 82... Main body, 1
3,63A-63F...opening, 14,24A,2
4B, 64A to 64F...Extra cloth, 14B, 38,
58... Surplus portion, 31A, 51A... First body constituent fabric, 31B, 51B... Second body constituent fabric, 31
C, 51C...Third main body constituent fabric, 90...Pulley.

Claims (1)

[Scope of Claims] 1. A balloon-like structure whose outline is formed by filling the inside with pressurized fluid, the structure having an allowance for creating a bent part in the main body, The length of the margin in a plane perpendicular to the axial direction is 1/1 of the length of the outer circumference of the structure.
A balloon-like structure characterized by being larger than 2. 2. The balloon-like structure according to claim 1, wherein the margin is at least one margin member fixed to an opening formed in the main body. 3. The balloon-like structure according to claim 1, wherein the margin is obtained by fixing a main body structural member obtained by three-dimensional cutting. 4 A balloon-like structure whose outline is formed by filling the inside with pressurized fluid, the body having a margin that creates a bent portion, and the margin of the inner wall of the body being formed. and a driving means disposed on the tip side of the axial direction of the structure, and the length of the margin in a plane perpendicular to the axial direction of the structure is 1/1 of the outer circumference of the structure.
A balloon-like structure characterized by being larger than 2. 5. The balloon-like structure according to claim 4, wherein the margin is at least one margin member fixed to an opening formed in the main body. 6. The balloon-like structure according to claim 4, wherein the margin is obtained by fixing a main body component obtained by three-dimensional cutting. 7. The balloon-like structure according to any one of claims 4 to 6, wherein the driving means is an operating string whose one end is fixed to the inner wall of the main body. 8. The above-mentioned claim 1 is characterized in that there are a plurality of said operation strings, and one end of each of said operation strings is fixed to a plurality of locations on said inner wall at different positions in the axial direction of said structure. Balloon-like structure according to item 7. 9. The balloon-like structure according to claim 7 or 8, wherein the operating string is regulated along the inner wall of the main body.