JPH10316148A - Expandable body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an impact-cushioning material which can be repeatedly used by a method wherein at least one end opening part of a second bag body which constitutes an internal layer, is connected to the opening of a cylindrical first bag body which constitutes an external layer, and the second bag body is stretched in the length direction when a fluid is filled between the first and second bag bodies. SOLUTION: When this expandable body 1 is used as an impact-cushioning body, a line fastener 6 is opened first, an article to be transported, e.g. a camera 7, is housed in a pocket part 4 from an inlet/outlet 5. Then, a tubular body 131 is inserted in a passage element 101 of an automatic closing valve 121, and a fluid, etc., are filled in an expandable chamber 8 between an external bag 2 and an internal bag 3. In this case, as the external bag 2 gradually expands, the bag body of the internal bag 3 is stretched in the longitudinal direction, and as the pocket part 4 is gradually pressurized, air in the pocket part 4 is automatically discharged from the inlet/outlet 5, and for this reason, the bag body of the internal bag 3 joins along the outer periphery of the camera 7 in the pocket part 4, and the camera 7 is stably held in the pocket part 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a general cushion used in a living room of a house, a packaging material generally used for transporting articles, glass products and ceramics which are easily damaged by impact, and vibrations. The present invention relates to an inflatable body applicable to a shock-absorbing material, a balloon, a bladder, a life jacket, a lifeboat, and the like used when transferring precision parts or the like that dislikes.

[0002]

2. Description of the Related Art Conventionally, when transferring glass products and ceramics which are easily damaged by an impact or precision parts which are not sensitive to vibration, expansions having various structures are used to prevent the damage. For example, as an example of such an impact cushioning material, plastic foam such as foamed styrene or urethane foam,
Paper such as foam beads, cords, corrugated cardboard, air mats having small air chambers arranged therein, and mats filled with other fluids are known.

[0003]

However, any of the shock-absorbing materials has the effect of securely holding the article to be transported at a predetermined position and preventing the article to be transported from being subjected to a shock or large vibration. There is a drawback that it is necessary to mold the shape of the article to be transported one by one, and it is difficult to mass-produce due to the complicated structure.

[0004] In addition, since shock-absorbing materials which are easily dissipated are used, there are drawbacks that processing after use is troubled, and it is difficult to recycle valuable resources because they cannot be reused.

[0005] The inflatable body of the present invention is intended to solve the above-mentioned drawbacks of the prior art, and it is necessary to securely hold an article to be transported at a predetermined position and not to apply impact or large vibration to the article to be transported. Rather, it is an object of the present invention to provide an inflatable body that can be very suitably applied to an impact buffer or the like that can be used regardless of the shape of an article to be transported.

[0006]

That is, an inflatable body according to the present invention comprises a first bag constituting an outer layer and a second bag constituting an inner layer, and the second bag is formed into a cylindrical shape. Forming, at least one end opening thereof is connected to the opening of the first bag body,
The other end is also connected to the first bag, so that when a fluid is filled between the first bag and the second bag, the opening of the second bag is closed by the first bag. And the second bag body receives a fluid pressure in a compression direction in a tension state in a length direction of the bag body.

[0007] The inflatable body of the present invention is characterized in that it can be used as a shock-absorbing material by storing articles that do not like impact in the second bag.

[0008] The inflatable body of the present invention is also characterized in that an automatic closing valve is used to fill the space between the first bag and the second bag.

In the expansion body according to the present invention, the automatic closing valve holds the openable and closable passage body made of a soft sheet at a support bent at a predetermined curvature, and the automatic close valve faces the support. The passage body is pressed tightly by the elastic body so that the passage body is normally closed, and one end of the passage body is opened and pressurized, or the elastic body is deformed when the rod-shaped body is inserted into the passage body. When the passage body is opened and one end of the passage body is closed to release the pressure, or when the rod-shaped body is pulled out, the passage body comes into close contact with the support by the restoring force of the elastic body so that the passage body is closed. Is also featured.

[0010] The inflatable body of the present invention is also characterized in that the rod-shaped body is formed of a tubular body such as a straw.

Further, the inflatable body of the present invention includes a sealing means at an opening of the second bag body, and one engaging means constituting the sealing means is a first bag body and a second bag body. And the other engaging means for engaging with one engaging means is provided at the end of the bag body.

According to the present invention, the article to be transported is securely held at a predetermined position, not only does not give a shock or a large vibration to the article to be transported, but also irrespective of the shape of the article to be transported. It has become possible to provide an inflatable body that can be used.

Further, the inflatable body of the present invention can be easily folded and stored in a very compact form after use, and can be reused as many times as necessary by taking in and out air and other fluids. It can also help protect precious resources.

Further, the inflatable body according to the present invention is characterized in that the sealing means for the second bag body serving as a storage portion is attached.
The engagement of the sealing means is not easily released, and the expanded first
Since it does not protrude from the outer shape of the bag body, it is possible to provide a shock-absorbing material that is very easy to handle as a whole.

[0015]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of an inflatable body according to an embodiment of the present invention.

FIGS. 1 (a), (b), (c), (d)
It is the schematic which shows the Example which applied the expansion body of this invention to an impact buffer. In the figure, reference numeral 121 denotes an automatic closing valve used for the expansion body of the present invention, and 1 denotes an expansion body to which the automatic closing valve 121 is attached. Then, the automatic closing valve 121 is provided with an opening at an appropriate position of the bag constituting the inflatable body 1, and the installation is completed only by fixing the following passage body 101 to this opening.

In the example of FIGS. 1A and 1B, when the gas, liquid, viscous substance, etc. are filled into the expansion body 1 while pressurizing from one end of the following passage body 101 of the automatic closing valve 121, FIG. 1
In the examples (c) and (d), the expansion body 1 is filled with gas, liquid, viscous material, etc. while inserting a tubular body (rod-like body) 131 from one end of the following passage body 101 of the automatic closing valve 121. Shows the case.

That is, the inflatable body 1 is composed of a double bag body of an outer bag 2 and an inner bag 3 arranged inside the outer bag 2, and the inner bag 2 forms a pocket portion 4 on its inner peripheral surface. In the figure, the outer bag 2 and the inner bag 3 are connected only at both ends in the length direction, and an intermediate portion thereof is not connected. The connecting portion may be formed integrally with the outer bag 2 and the inner bag 3 on the side of the entrance 5 to be described later, instead of being joined by special welding or the like. The connection on the side opposite to the doorway 5 side is an essential condition for the inflatable body 1 of the present invention, because without this connection, the inner bag 3 is pushed out at the time of inflation. A sealable space (expansion chamber) 8 is formed between the outer bag 2 and the inner bag 3.

The automatic closing valve 121 is provided with the inflatable body 1.
An opening communicating with the outer bag 2 and the inner bag 3 is provided at an appropriate position of the bag body, and the installation is completed only by fixing the following passage body 101 to this opening. Reference numeral 5 denotes a doorway serving as a passage to the pocket part 4 provided on the opposite side of the opening, and reference numeral 6 denotes sealing means for opening and closing the doorway 5. Although a line fastener is used in the figure, a zipper, a hook-and-loop fastener, a hook type, and the like can be suitably used.

When using the expansion body 1 of this embodiment,
The line fastener 6 is opened in advance, and articles to be transported from the entrance 5 into the pocket portion 4, that is, a camera 7 in the figure, are loaded (a). Next, a straw or other tubular body 131 is inserted into the passage body 101 of the automatic closing valve 121 to fill the space (expansion chamber) 8 between the outer bag 2 and the inner bag 3 with air, fluid, or other material (b). . At this time, the outer bag 2 is gradually expanded and the bag is stretched, and the bag of the inner bag 3 is also stretched in the longitudinal direction at the connection portion with the outer bag 2 while the pocket 4 is gradually pressurized. Then, the bag body of the inner bag 3 adheres along the outer periphery of the camera 7 (c).

As the pocket portion 4 is pressurized, the air in the pocket portion 4 is automatically discharged from the entrance 5 so that the bag of the inner bag 3 is placed on the outer periphery of the camera 7 in the pocket portion 4. Make sure to adhere along. In this case, the more flexible the inner bag 3, the more easily it comes into close contact with the camera 7. (D) is a sectional view taken along the line AA in (c).

As described above, since the inner bag 3 is connected to the outer bag on the side opposite to the entrance 5, the inner bag 3 is stretched with inflation, and the inner bag 3 extends from the back of the pocket 4 toward the entrance 5. The air inside the pocket 4 is reliably pushed out from the inside of the pocket 4 toward the entrance 5 while being in close contact, so that a state without air inside the pocket 4 can be created.

When the tubular body 131 is pulled out by applying pressure to a predetermined pressure, the automatic closing valve 121 operates to activate the outer bag 2 and the inner bag 3.
There is no leakage of air or the like from the gap. According to the confirmation of the inventor, the inflatable body 1 did not shrink over a long period of time unless the bag was torn.

The article to be transported and the camera 7 held in the pocket portion 4 of the inflatable body 1 are firmly supported in such a state that the camera 7 floats almost at the center of the outer bag 2 in the above-mentioned pressurized state. 2 was hardly affected by external shock or vibration.

In the above, as the expansion body of the present invention,
Used for transporting general cushions used in living rooms of houses, packaging materials generally used for transporting goods, glass products and ceramics that are easily damaged by impact, and precision parts that dislike vibration. Needless to say, the present invention is not limited to those having the above-described structure as long as the basic idea of the present invention is applied, as well as being applicable to shock-absorbing materials, balloons, flying bags, life jackets, life boats, etc. Nor.

For example, when used as a shock-absorbing material for packing, if it is housed inside the outer box 9 as shown in FIG. 2, it expands so as to be in close contact with the inner surface of the outer box 9. The external shape can be fixed according to the condition. The outer box 9 itself may be automatically assembled in accordance with the expansion of the expansion body 1, or may be folded as the expansion body 1 contracts. Alternatively, as shown in FIG. 3, the thicknesses of the materials of the outer bag 2 and the inner bag 3 are changed, or materials having different hardness and flexibility are selected within a range that does not affect mutual welding. By providing the outer bag 2 with a function as a shell or a protector having high trauma resistance, the inflatable body 1 can be used as it is as a packing container. If a material having high flexibility or elasticity is used for the inner bag 2, swinging of the stored items can be allowed. As described above, when the inflatable body 1 of the present invention is used as a packing material (container / buffer material), there is an advantage that the shape of the stored material is not restricted when used, and the internal fluid is discharged when not used. Once folded, high storage efficiency can be obtained, and a significant improvement in transportation efficiency can be expected.

The use of the above-described property of no air can be suitably used for storing anaerobic articles which are vulnerable to vibration and the like. The use of this property, in which a vacuum pump is not required to create a state without air, and instead, air is created by pressurizing with air, etc., promotes widespread use in homes that do not have special equipment etc. It is highly expected to be possible.

Further, the automatic shut-off valve 121 used in the expansion body 1 of the present invention is a so-called one-way valve which is normally circulated only in one direction in addition to the one shown in the above embodiment. A valve having a property of allowing a backflow only when the flow is performed can be arbitrarily selected.

FIG. 4 is a schematic view showing a method of attaching the sealing means provided at the opening of the inner bag 3 of the inflatable body 1. As shown in (a), the outer bag 2 and the inner bag 3 are joined together at only the leading ends thereof (hereinafter referred to as a continuous portion 10), and the other is overlapped (hereinafter referred to as a lamination). Unit 11). Therefore, in the former case, a continuous sheet may be folded back rather than combined. Then, the engaging members 12 and 13 constituting the sealing means (line fastener in the figure) 6 are fixed to the leading end of the inner bag 3 in the continuous portion 10 and the laminated portion 11, respectively.

When a conveyed object or the like is inserted into the pocket portion 4 and the sealing means 6 is closed to fill the expansion chamber 8 with a fluid such as air, the internal pressure is uniformly applied to the expansion chamber with the inner bag 3 interposed therebetween. Then, the inner bag 2 is inflated. Then, as shown in (b), the continuous portion 10 expands with the expansion of the upper expansion chamber, so that the line fastener 6 is pulled upward. Then, at the stage where the expansion is completely completed, the laminated portion 11 is pulled toward the upper inflation chamber side and comes into close contact with the outer bag 2 so as to cover the line fastener 6. With the above-described mounting method of the sealing means 6, the expanding means 1 is very easy to handle because the sealing means does not protrude from the outer shape of the expanding body and does not become an obstacle.

Hereinafter, the details of the automatic closing valve 121 that is optimal for the expansion body of the present invention will be described.

FIG. 5 shows an automatic closing valve 121.
1 shows an openable / closable passage body made of a soft sheet. The passage body 101 can be formed by bonding two soft sheets together, and the passage portion 102 can be opened in a cylindrical shape. Also, on both sides of the passage portion 102,
A slip stopper 103 that holds the passage body 101 by being sandwiched between a support and an elastic body described below is formed. 104 is a passage body 101 protruding from the position of the slip stopper 103.
The guide section.

As the passage body 101, a soft sheet to be used may be a rubber sheet, a plastic sheet, waterproof paper,
It is desirable to select from waterproof cloth, aluminum foil or a composite sheet of these.

FIG. 5A shows a case where the passage portion 102 of the passage body 101 is closed, and FIG.
01 shows a state in which the passage portion 102 is open and gas, liquid, viscous material, and the like are passing therethrough.

FIG. 6 shows a passage portion 102 of a passage body 101,
This shows a case where two soft sheets are bonded together and heated and welded. In the figure, (a) is a tapered passage portion 10 which is narrowed toward the opposite side of the guide portion 104.
2 is shown. (B) is a passage portion 1 which is narrowed toward the opposite side of the guide portion 104 and further has a cylindrical shape.
02 is shown. (C) shows a passage portion 102 which is narrowed after having a portion of a predetermined size toward the opposite side of the guide portion 104 and further has a cylindrical shape. (D) is a passage portion 1 formed in a cylindrical shape having the same diameter as the guide portion 104.
02 is shown.

It is desirable that the width of the passage portion 102 of the passage body 101 is such that the passage of gas, liquid, viscous material, etc. is reasonable and the entire automatic closing valve 121 does not become large. Of course, when the filling operation is performed with a rod-shaped body such as a straw, it is desirable that the size be in accordance with the diameter of the rod-shaped body to be inserted.

As a means for forming the passage portion 102 in the passage body 101, a means for bonding two soft sheets together and heating and welding the two soft sheets at the slip preventing piece 103 is desirable.
Of course, other forming means may be used. When welding the slip stopper 103, it is sufficient to weld only the boundary with the passage portion 102.

FIGS. 7A to 7C show the above-mentioned passage body 10.
FIG. 1 shows an example of a support and an elastic body for opening and closing, particularly automatically closing, by sandwiching 1. Support 105
Are formed separately from the elastic body 106 (not shown).
The plastic hinge 1 is attached to the end of the support 105.
The cover 108 is formed so as to extend in the left-right direction via the cover 07. The support 105, the plastic hinge 107, and the lid 108 are desirably formed by injection molding a plastic material made of polyethylene, polypropylene, polyester, polycarbonate, or the like into a predetermined shape. Of course, the molding method is not limited to this injection molding.

In FIG. 7A, holding guides 109 are provided on both upper and lower sides of the support 105, respectively. In the center of the upper end of the support 105,
An insertion guide 110 is provided at a position where the rod is inserted.

In the example shown in FIG. 7A, the lid 108 has a guide groove 112 having an arc-shaped cross section for accommodating the passage body 101 passing through a rod-like body at substantially the center of a flat plate. Rib 1 for holding sheet-shaped elastic body 106
13 are formed in a pair along the length direction of the passage body 101. The length, shape, position, and number of the ribs 113 can be appropriately determined according to the thickness, size, and the like of the elastic body 106. However, it is desirable to have a sufficient length, shape, position and number not to impair the opening / closing reaction of the elastic body 106.

Reference numeral 114 denotes a hook for coupling with the support 105 provided at the end of the lid 108. The hook 114 is fitted into a receptacle 115 provided at the end of the support 105 so as to penetrate in the thickness direction, and is prevented from falling off. By fixing the support 105 and the elastic body 106 together with the lid 108 in a state of being bent at a predetermined curvature in this way, it is possible to obtain the automatic shut-off valve 121 having extremely excellent durability.

In the example of FIG. 7B, the lid 108 has ribs 113 for pressing the elastic body 106 formed on both sides of the guide groove 112 in a direction perpendicular to the length direction of the passage body 101. ing.

In the example shown in FIG. 7C, the lid 108 is connected to a guide groove 112 having a central arc-shaped cross section in a state where the lid 108 is inclined inward along both sides of the support 105 from both ends. No rib 113 is formed to press the rib.

In the above, the hook 114 and the receiving port 1
Although the connecting means consisting of 15 is exemplified, not only such connecting means but also means such as sealing the automatic shut-off valve 121 in a cylindrical sheet, or means such as heat welding, and other shapes and structures can be used.

The support 105 and the lid 108 may have the same thickness, or may have different thicknesses. Speaking of the relationship with the passage body 101, the support 1
05 and the lid 108 need to be thick enough not to be deformed, and the passage body 101 needs to be thin because it needs flexibility, and the elastic body 106 needs to have a predetermined thickness for its function. I do. Of course, the elastic body 106 is desirably thicker than the passage body 101.

The material of the passage body 101 and the elastic body 106 can be selected from a plastic sheet, a metal sheet, or a composite sheet using these as a constituent material. Examples of the plastic sheet include polyethylene, polypropylene, polyester, polycarbonate and the like. In this case, it is desirable that the passage body 101 be made of the same material.

The thickness of the elastic body 106 is desirably about 0.1 to 0.5 mm when a plastic sheet such as polyethylene is used.
The dimensions of the support and the elastic bodies 105 and 106 are, for example, about 2 to 1.5: 1 in the ratio of the horizontal axis to the vertical axis in the case of a rectangular shape.
Is desirable. For example, the horizontal axis: the actual size of the vertical axis is 40 mm: 2
The dimensions can be 5 mm, 35 mm: 20 mm, 30 mm: 11 mm, and the like.

The radius of curvature when the support 105 and the elastic body 106 are curved is preferably 11 mm to 40 mm. At a small curvature, the support 105 and the elastic body 106
Of the passage body 101 is strong, and the reaction to the insertion and removal of the tubular body 131 is good. Conversely, by increasing the radius of curvature, it is possible to adjust the force between the support body 105 and the elastic body 106 that sandwiches the passage body 101, and the force applied when transferring under pressure and when inserting and removing the rod-shaped body. .

In terms of the material, the bag constituting the inflatable body 1, the passage body 101, the support 105 and the elastic body 106, the lid 10
It is desirable to use a single material for any of the plastic materials and sheets constituting the material 8. For example, a plastic-based material or a material formed of a composite sheet of these and an aluminum foil or the like is extremely suitable for solving the above-mentioned problems of the present invention in terms of versatility, workability, and disposability after being turned into a material. Make sure that.

FIGS. 8 to 11 show a state in which the passage body 101 is sandwiched between the support 105 and the elastic body 106 to constitute the automatic closing valve 121 of the present invention. That is, FIG.
9 shows a state in which the support 105 and the lid 108 are open, and FIG.
The passage body 10 along the holding guide 109 of the support 105.
10 shows a state in which a long sheet constituting the elastic body 106 is accommodated, and FIG. 10 shows a state in which the hook 114 of the lid 108 is fitted into the receptacle 115 of the support 105 and both sides of the passage body 101 are sandwiched. ing. In FIG. 10 showing the completed state, the passage body 101 is pressed against the support body 105 by the rib 113 of the lid 108 together with the elastic body 106.

The automatic shut-off valve 121 assembled as described above is connected to the passage body 101 as shown in FIGS.
Are held in an arc shape in a state of being curved along with the curvature of the support 105 and the elastic body 106, and the lid 108 is at the position of the chord. By doing so, the elastic body 106
Can be held along the support 105 by the lid 108, and the curvature can be surely maintained by the rib 113, so that the passage body 101 can be firmly pressed.

The operation of the expansion body of the present invention configured as described above will be described.

FIG. 13 shows a state in which a straw or other tubular body 131 is inserted into the passage body 101. The self-closing valve 121 is provided with a support 105 by inserting a tubular body 131 into the passage portion 102 of the passage body 101.
And the passage portion 102 closely contacted by the elastic body 106
It releases the close contact and secures the passage. In this embodiment, a straw is used as such a tubular body 131 to secure a more reliable passage.

In FIG. 14, which explains the above operation in more detail, the distal end of a tubular body 131 made of a straw or the like is inserted from the upper end of the guide portion 104 of the passage body 101. Actually, by attaching an insertion guide to this portion, the tubular body 131 is shaped so as to be easily inserted. When the tubular body 131 is gradually pushed down as shown in FIGS. 7A to 7C, the passage portion 102 of the passage body 101
06 is pushed out.

When the tubular body 131 is further pushed down, the elastic body 106 pressed against the support 105 by the lid 108 is spread over the entire length along the tubular body 131, and as shown in FIG. Liquids, viscous substances and the like can be freely circulated. Therefore, the filling operation using the tubular body 131 made of a straw or the like can be easily performed.

Conversely, when trying to close the passage portion 102 of the passage body 101, the tubular body 131 may be simply pulled out. That is, the elastic body 106 gradually returns to the original position and comes into close contact with the support 105, and the passage portion 10 of the passage body 101.
In FIG. 2, the entire length is automatically brought into close contact again by reversing the drawing from (d) to (a). At this time, the automatic closing valve 12
When pressure is applied to push back the object from the opposite direction, the passage body 1 passes through the support 105 and the elastic body 106.
01 is transmitted to the passage portion 102 of the passage body 101.
Is further sealed.

In the above, the passage portion 1 of the passage body 101
02 is opened and closed by a tubular body 131 made of a straw or the like, but one end of the passage body 101 is opened, and the object is forcibly moved while being pressed against the elastic force of the elastic body 106. By passing through 102, press-fitting can also be performed.

In this way, the backflow and leakage of the fluid in the expansion body are prevented by the automatic closing valve, so that the expansion state can be maintained for a long time.

Note that, as the elastic body 106, a rod-shaped body or an elastic tube having elasticity can be used instead of sheets, and a silicon tube can be suitably used as the elastic tube.

[0060]

According to the present invention, the article to be transported is securely held at a predetermined position, and the article to be transported is not subjected to any shock or large vibration, and the shape of the article to be transported is not limited. It has become possible to provide an inflatable body that can be used without using an inflatable body.

The inflatable body of the present invention can be easily folded and stored in a very compact form after use, and can be reused as many times as necessary by taking in and out air and other fluids. It can also help protect precious resources.

Further, the inflatable body according to the present invention is characterized in that the sealing means for the second bag body serving as the storage section is attached.
The engagement of the sealing means is not easily released, and the expanded first
Since it does not protrude from the outer shape of the bag body, it is possible to provide a shock-absorbing material that is very easy to handle as a whole.

[Brief description of the drawings]

FIGS. 1 (a), 1 (b), 1 (c) and 1 (d) are schematic views showing one embodiment of an expansion body of the present invention.

FIG. 2A is a schematic view showing a second embodiment of the expansion body of the present invention, and FIG. 2B is a cross-sectional view thereof.

FIG. 3A is a schematic view showing a third embodiment of the expansion body of the present invention, and FIG. 3B is a cross-sectional view thereof.

FIGS. 4 (a), (b) and (c) are schematic views showing a method of attaching a sealing means for an inner bag.

FIGS. 5A and 5B show an openable and closable passage body made of a soft sheet, which constitutes the expansion body of the present invention. FIG. 5A shows a case where the passage portion of the passage body is closed, and FIG. It is the perspective view and AA sectional view which show the state in which the part was open and the transfer object, such as gas, liquid, viscous material, powder, and granular material, is passing.

6 (a) to 6 (d) are schematic perspective views showing a case where a passage body is bonded by heating two sheets of soft sheets together.

FIGS. 7A to 7C are perspective views each showing an example in which a support and a lid are integrally formed.

FIG. 8 is a perspective view showing an example in which a support and a lid are opened.

FIG. 9 is a perspective view showing a state where a passage body is assembled between a support and a lid.

FIG. 10 is a perspective view showing a state where the support and the lid are combined.

FIG. 11 is an enlarged plan view showing a state where the support and the lid are combined.

FIG. 12 is an enlarged cross-sectional view showing a state where a support and a lid are combined.

FIG. 13 is an enlarged sectional view showing a state where a rod-shaped body is inserted into a passage body.

FIGS. 14A to 14D are cross-sectional views showing a state in which a rod is inserted into a passage body in a stepwise manner.

FIGS. 15 (a) to (c) are schematic views showing stepwise use states of another embodiment of the expansion body of the present invention. (D) is a cross-sectional view of (c).

FIG. 16 (a) is a schematic view showing a use state of another embodiment of the expansion body of the present invention. (B) is a cross-sectional view thereof.

FIG. 17 (a) is a schematic view showing a use state of another embodiment of the expansion body of the present invention. (B) is a cross-sectional view thereof.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Inflatable body 2 Outer bag 3 Inner bag 4 Pocket part 5 Doorway 6 Line fastener 7 Camera 8 Inflation chamber 9 Outer box 10 Continuation part 11 Stacked part 12, 13 Engaging member 101 Passage body 102 Passage part 103 Slip stopper 104 Guide part 105 Support 106 Elastic body 107 Hinge 108 Lid 109 Holding guide 110 Insertion guide 112 Guide groove 113 Rib 114 Hook 115 Receptacle 121 Automatic closing valve 131 Rod

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[Procedure amendment]

[Submission date] September 5, 1997

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Brief description of drawings

[Correction contents]

[Brief description of the drawings]

FIGS. 1 (a), 1 (b), 1 (c) and 1 (d) are schematic views showing one embodiment of an expansion body of the present invention.

FIG. 2A is a schematic view showing a second embodiment of the expansion body of the present invention, and FIG. 2B is a cross-sectional view thereof.

FIG. 3A is a schematic view showing a third embodiment of the expansion body of the present invention, and FIG. 3B is a cross-sectional view thereof.

FIGS. 4 (a), (b) and (c) are schematic views showing a method of attaching a sealing means for an inner bag.

FIGS. 5A and 5B show an openable and closable passage body made of a soft sheet, which constitutes the expansion body of the present invention. FIG. 5A shows a case where the passage portion of the passage body is closed, and FIG. It is the perspective view and AA sectional view which show the state in which the part was open and the transfer object, such as gas, liquid, viscous material, powder, and granular material, is passing.

6 (a) to 6 (d) are schematic perspective views showing a case where a passage body is bonded by heating two sheets of soft sheets together.

FIGS. 7A to 7C are perspective views each showing an example in which a support and a lid are integrally formed.

FIG. 8 is a perspective view showing an example in which a support and a lid are opened.

FIG. 9 is a perspective view showing a state where a passage body is assembled between a support and a lid.

FIG. 10 is a perspective view showing a state where the support and the lid are combined.

FIG. 11 is an enlarged plan view showing a state where the support and the lid are combined.

FIG. 12 is an enlarged cross-sectional view showing a state where a support and a lid are combined.

FIG. 13 is an enlarged sectional view showing a state where a rod-shaped body is inserted into a passage body.

FIGS. 14A to 14D are cross-sectional views showing a state in which a rod is inserted into a passage body in a stepwise manner.

[Explanation of Signs] 1 Inflatable body 2 Outer bag 3 Inner bag 4 Pocket part 5 Doorway 6 Line fastener 7 Camera 8 Inflation chamber 9 Outer box 10 Continuity part 11 Stacking part 12, 13 Engaging member 101 Passage body 102 Passage part 103 Displacement Stop piece 104 Guide part 105 Support body 106 Elastic body 107 Hinge 108 Lid 109 Retention guide 110 Insertion guide 112 Guide groove 113 Rib 114 Hook 115 Receptacle 121 Automatic closing valve 131 Rod

Claims (6)

[Claims] 1. A first bag forming an outer layer, and a second bag forming an inner layer, wherein the second bag is formed in a cylindrical shape, and at least one end opening of the second bag is formed by the first bag. The first bag is connected to the opening of the bag and the other end is also connected to the first bag.
When a fluid is filled between the bag and the second bag, the opening of the second bag is pulled by the first bag, and the second bag is moved in the longitudinal direction of the bag. An expansion body characterized in that the expansion body receives a fluid pressure in a compression direction in a tensioned state. 2. The inflatable body according to claim 1, wherein an article that does not like impact is stored in the second bag so that it can be used as an impact buffer. 3. The inflatable body according to claim 1, wherein an automatic shut-off valve is used to fill the space between the first bag and the second bag. 4. An automatic closing valve holds an openable and closable passage body made of a soft sheet on a support bent at a predetermined curvature, and presses and closes the passage body with an elastic body toward the support. In this way, the passage body is normally closed, and one end of the passage body is opened and pressurized, or when a rod-shaped body is inserted into the passage body, the elastic body is deformed and the passage body is opened, and one end of the passage body is opened. 3. The expansion body according to claim 2, wherein the passage body is brought into close contact with the support by the restoring force of the elastic body when the pressurization is released or the rod-shaped body is pulled out to close the passage body. 5. The inflatable body according to claim 4, wherein the rod-like body is formed of a tubular body such as a straw. 6. A sealing means is provided at an opening of the second bag body, and one engaging means constituting the sealing means is provided at a laminated portion of the first bag body and the second bag body, The other engaging means for engaging with one engaging means is provided at an end of the bag body.
6. The inflatable body according to any one of items 5 to 5.