HK1054361B

HK1054361B - Inflating type cushioning package body

Info

Publication number: HK1054361B
Application number: HK03106637.3A
Authority: HK
Inventors: 萩原忠
Original assignee: 萩原忠
Priority date: 1999-11-24
Filing date: 2000-11-22
Publication date: 2005-04-29
Also published as: KR20020071869A; CN1413162A; CN1161260C; HK1054361A1; AU1549901A; JP2001213480A; EP1251080A1; CA2392289A1; WO2001038195A1

Abstract

An air bag, comprising an automatic closing check valve and at least a pair of air chambers each formed of a flexible sheet and opposed to each other, wherein, after an object is stored in a space hold between these opposed air chambers, gas is filled into the air chambers so that the object can be pressed and held by the inflation of the two air chambers opposed to each other. <IMAGE>

Description

Expansion type buffer packaging body

Technical Field

The invention relates to a reusable expansion type buffer packaging body.

Background

Conventionally, when transferring, for example, glass products and ceramic products which are liable to be broken by impact, precision parts which are adversely affected by vibration, and the like, breakage can be prevented by using an expansion body of various structures. For example, as examples of such a cushion member, there are known a plastic foam such as styrofoam or urethane foam, a foamed pellet or string thereof, paper such as corrugated board, an air cushion in which small air chambers are arranged, a cushion filled with another fluid, and the like.

However, with any cushioning material, there are disadvantages that the effect of reliably holding the conveyed article at a predetermined position and not causing impact, large vibration, or the like to the conveyed article is insufficient, and that the shape forming and the structure corresponding to one conveyed article are required to be complicated, and mass production is difficult.

In addition, the use of the buffering and cushioning material which is easy to dissipate has the disadvantages of difficult treatment after use, no reutilization and difficult regeneration of valuable resources.

For this reason, a cushioning material using an air bag has been proposed in the past as represented by japanese utility model No. 4-27771. In each of them, a plurality of air bags are formed in a cylindrical shape, and an object is inserted into the air bags and filled with air, thereby holding the object by expansion. Then, a check valve is provided thereon, forming a configuration in which the once-filled air does not leak.

However, the conventional check valve for the expansion type cushion has not sufficient performance and cannot completely prevent air leakage by a simple mechanism, and therefore, the air chamber collapses with the passage of time, and the function as a cushion material cannot be sufficiently exhibited.

Therefore, the present invention has been made to solve the above-mentioned drawbacks of the conventional examples, and an object thereof is to provide an inflatable cushion packaging body which can not only reliably hold a conveyed article at a predetermined position, but also apply an impact and a large vibration to the conveyed article, and can be used regardless of the shape of the conveyed article, and can maintain the performance for a long period of time.

Disclosure of Invention

That is, the inflatable cushion packaging body of the present invention is an air bag having at least a pair of opposed air chambers formed of flexible sheets, the air chamber has an automatic check valve in which both sides of an openable and closable duct body made of a flexible sheet are sandwiched by a support body in a state of being bent at a predetermined curvature and an elastic member capable of coming into close contact with the support body, or further clamping the channel body and the elastic material by a support body and a cover body which are bent according to a prescribed curvature, and joining the channel body and the elastic material by a joining device, pushing the elastic material by the cover body along the support body in a state of being bent according to the prescribed curvature, the channel body is closed in a normal state, and when the rod-shaped body is inserted into the channel body between the supporting body and the elastic material, the elastic material is deformed, the channel body is opened, when the rod-shaped body is pulled out, the elastic material is tightly contacted with the supporting body under the action of restoring force to close the channel body; the method is characterized in that: by filling the air chambers with gas after the object is accommodated in the space sandwiched between the opposing air chambers, the object can be held by being pressed by the expansion of the opposing 2 air chambers.

The pair of opposing air chambers may have the following features.

(1) The flexible sheet is formed by sandwiching 1 folded flexible sheet by 2 flexible sheets and welding (welding) the periphery.

(2) The two-folded flexible sheet 1 is sandwiched by the two-folded flexible sheet 1 and welded to the periphery.

(3) The tubular flexible sheet is folded in half and then the ends are welded.

(4) The periphery of the 1 flexible sheet is folded in two and then welded, and the folded portion is formed as a superposed portion of the welded ends.

(5) Communicating through an air passage.

(6) But also features a desired spacing.

(7) An air channel anti-flex member is inserted into the air channel.

The following features are also possible.

(8) The small air chambers connecting the pair of air chambers facing each other are formed by a plurality of air passages arranged in the longitudinal direction of the package body and separated by weld lines broken into dotted lines.

(9) One of the flexible sheets constituting the inflatable cushion packaging body on the outer skin side is thicker than the other sheet on the inner skin side.

(10) One of the flexible sheets constituting the inflatable cushion packaging body on the outer skin side has higher mechanical strength than the other sheet on the inner skin side.

An inflatable cushion packaging body of the present invention is an air bag having at least a pair of opposing air chambers made of flexible sheets, the air chambers having automatic check valves, and the air chambers being filled with gas after an object is accommodated in a space sandwiched between the opposing air chambers, and the object being held by being pressed by the expansion of 2 opposing air chambers, characterized in that: the automatic check valve is characterized in that both sides of an openable and closable channel body made of a flexible sheet are clamped by a support body bent at a predetermined curvature and an elastic member capable of being in close contact therewith, and at the same time, the channel body and the elastic member are clamped by the support body and a cover body bent at the predetermined curvature and engaged by an engaging means, the elastic member is pressed by the cover body along the support body in a state bent at the predetermined curvature, the channel body is closed in a normal state, and when a rod-shaped body is inserted into the channel body between the support body and the elastic member, the elastic member is deformed, the channel body is opened, and when the rod-shaped body is pulled out, the elastic member is in close contact with the support body under the action of a restoring force to close; the pair of air cells facing each other is formed by folding 1 sheet of flexible sheet in half, welding the periphery, folding the periphery in half, and then overlapping the welded ends, and the pair of air cells facing each other are communicated with each other through an air passage, and the pair of air cells facing each other are separated from a desired space by a smaller air chamber.

According to the present invention, the use of the high-performance automatic closing check valve can reliably hold the conveyed article at a predetermined position, and not only can the conveyed article be subjected to impact, large vibration, or the like, but also the article can be used regardless of the shape of the conveyed article, and the performance can be maintained for a long period of time.

Even when repeatedly used, the check valve has durability enough to withstand automatic closing, and therefore, can maintain the performance as a cushion material for a long period of time.

Drawings

Fig. 1 is a front view (a) and a bottom view (b) of an inflatable cushion package according to the present invention.

Fig. 2(a) - (e) are schematic diagrams showing a configuration example of the expansion type cushion packaging body of the present invention.

Fig. 3(a) - (e) are schematic views showing a configuration example of the expansion type cushion packaging body of the present invention.

Fig. 4(a) - (e) are schematic views showing a configuration example of the expansion type cushion packaging body of the present invention.

Fig. 5(a) - (e) are schematic views showing a configuration example of the expansion type cushion packaging body of the present invention.

Fig. 6(a) and (b) and (c) and (d) are a perspective view and a plan view respectively showing the constitution of the essential part of the check valve.

Fig. 7(a) - (d) are schematic views showing a thermal welding example of the channel body.

Fig. 8(a) - (c) are perspective views showing a configuration example of the lid body.

Fig. 9 is a view showing an assembled state of the check valve.

Fig. 10 is a perspective view showing a state where the check valve is assembled.

Fig. 11 is a perspective view showing a state where the check valve is assembled.

Fig. 12 is a plan view thereof.

Fig. 13 is a cross-sectional view thereof.

Fig. 14 is a cross-sectional view showing a state where the straw is inserted.

Fig. 15(a) - (d) are longitudinal sectional views showing the action of the check valve.

Fig. 16 is a schematic diagram illustrating a method of using the intumescent cushioning package of the present invention.

Fig. 17 is a schematic view showing an example of the use of the inflatable cushion package of the present invention.

Fig. 18(a) - (c) are front and side views showing the 2 nd embodiment of the inflatable cushioning package of the present invention.

Fig. 19(a) - (e) are schematic diagrams showing examples of the configuration.

Fig. 20(a) and (b) are front views showing an example of the arrangement of the check valve.

Fig. 21(a) - (f) are schematic diagrams showing other configuration examples.

Fig. 22(a) - (f) are schematic diagrams showing other configuration examples.

Fig. 23(a) - (e) are schematic diagrams showing other configuration examples.

Fig. 24 is a schematic diagram showing an air chamber communicating portion meandering preventing structure and an example of use thereof.

Fig. 25(a) - (f) are schematic diagrams showing other configuration examples.

Fig. 26(a) - (b) are schematic views showing the use states thereof.

Fig. 27(a) - (c) are schematic diagrams showing other configuration examples.

Fig. 28 is a schematic view showing a use state thereof.

Detailed Description

The following describes an embodiment of the inflatable cushion pack according to the present invention with reference to the drawings.

Fig. 1 is a front view (a) and a bottom view (b) of an inflatable cushion package 1 according to the present invention.

In the figure, an article 2 such as a tea caddy is inserted. Reference numeral 3 denotes an automatic closing check valve (hereinafter referred to as a check valve).

That is, as shown in fig. b, the air chambers 4 and 5 are arranged to face each other, and in a state before the air chambers are filled with air (normal state), they substantially form a cylindrical body. The air chambers communicate with each other, and a check valve 3 is provided on one side of the air chambers.

When an object (in the figure, the cylindrical body 2) is inserted in a normal state and air is filled from the check valve 3, both air chambers are gradually expanded, and the sheet 6 constituting the inner wall is brought into close contact with the object 2. When the air chamber is filled with sufficient air, the object 2 is fixed to the substantially center of the package 1.

Fig. 2-5 illustrate several construction examples of the inflatable cushioning package of the present invention.

Fig. 2 shows a case of using 3 flexible sheets as a configuration example 1. First, 3 flexible sheets of 1 sheet 7 folded in two and constituting the inner wall and 2 flat sheets 8A and 8B constituting the outer wall are prepared. (a) In the sheet size, the width a of the folded-in-half sheet 7 is smaller than the width a of the other sheets 8A, 8B. This is because when 3 sheets are stacked and welded on the periphery, the bent portion 9 of the tab 7 is not welded and this portion is formed as a communicating portion of the air chamber.

The 3 sheets adjusted to have such dimensions are overlapped as shown in fig. b and welded along the periphery of the sheet 8 (arrow head portion). At this time, the check valve 3 is disposed between the sheets 7 and 8. When welding, more specifically, all the end portions of the sheet 7 except the folded-over portions 9 are welded to the sheet 8.

The check valve 3 is disposed at the bent portion of the sheet 7 in the drawing, but may be an end portion on the opposite side as shown in (c). In this case, the folded portion 9 of the sheet 7 may be secured as a communicating portion for air without being fused to the sheet 8.

The drawing (d) is a normal front view, and (e) is a cross-sectional view. The state was as a squashed cylinder.

The flexible sheet may be made of a plastic sheet, a metal sheet, or a composite sheet made of the same. Examples of the plastic sheet include polyethylene, polypropylene, polyester, polycarbonate, nylon resin, and the like. These soft sheets or composite sheets may be formed by bonding 2 sheets of the materials together and heat-sealing the periphery thereof to a predetermined width to heat-weld the sheets together, or may be a laminate having a multilayer structure in which an outer layer is made of polyethylene or polypropylene and an inner layer is made of nylon resin or polyester.

In the following examples, the use of a laminate is assumed, but since nylon materials cannot be welded to each other, it is necessary to take measures against the materials used in the treatment of the welded portion.

Fig. 3 shows a case where 2 flexible sheets are folded in two and used in the 2 nd configuration example.

First, the sheet 7 constituting the inner wall and the sheet 8(a) constituting the outer wall are prepared. The width dimensions (a) and (B) of the sheet 8 are larger than those of the sheet 7. This is for the same reason as the configuration example shown in the previous drawings.

After being folded in half, the ends are opposed to each other. The sheet 7 is inserted between the folded sheets 8(b), and then the check valve 3 is inserted and welded along the periphery of the sheet 8 (c).

The drawing (d) is a normal front view, and (e) is a cross-sectional view. The cylindrical body is flattened.

Fig. 4 shows a case where the cylindrical sheet is used in the configuration example of fig. 3. First, the cylindrical flexible sheet as described in (a) is prepared. Then, the check valve 3 is inserted into 1 end portion, and 2 end portions 10 are welded.

Although the most simple configuration, the inner sheet is brought into close contact with the outer sheet at the bent portion, and therefore, the air in the air chamber does not sufficiently flow, and even when the air is filled, the air chamber having only the check valve 3 tends to expand.

Fig. 5 shows a case where the 4 th configuration example is configured by only 1 sheet.

1 flexible sheet as shown in the figure (a) is prepared, and a portion 7 constituting an inner wall and a portion 8 constituting an outer wall as shown in the figure (a) are connected to each other.

Subsequently, as shown in (b), the check valve 3 is folded in two with the check valve interposed therebetween and welded along the end portions. Further, the end portion 12 is folded in two as shown in (c) and (d) and welded.

Fig. d is a normal front view showing a state where the cylindrical body is squashed.

In this example, the reason why the end portion 12 is provided so as to have a size different from that of the portion 7 and the portion 8 is that, for example, when the flexible sheet is a composite sheet, the front side of the paper surface is made of a heat-weldable material such as polyethylene or polypropylene, and the back side of the paper surface is made of a non-heat-weldable material such as nylon, the heat-weldable materials must be opposed to each other. Therefore, in the case of using a single material that can be heat-welded, the dimensions of the portions 7 and 8 are completely the same, and it is not necessary to form the end portions 12.

Fig. 6 to 15 show an example of a check valve used for the inflatable cushion packaging body of the present invention.

Fig. 6 shows an openable and closable channel body made of a soft sheet constituting a main portion of the check valve. The channel body 101 is formed by bonding 2 flexible sheets, and the channel portion 102 is opened in a cylindrical shape. Further, on both sides of the channel portion 102, anti-deflection pieces 103 are formed which hold the channel body 101 sandwiched between a support body and an elastic body described below. Reference numeral 104 denotes a guide portion of the passage body 101 projecting from the position of the deviation preventing piece 103.

The channel body 101 is preferably made of a soft sheet selected from a rubber sheet, a plastic sheet, waterproof paper, waterproof cloth, an aluminum foil, and a composite sheet thereof.

In fig. 6, (a) and (b) show the state when the passage portion 102 of the passage body 101 is closed, and (c) and (d) show the state when the passage portion 102 of the passage body 101 is opened and the gas passes through.

Fig. 7 shows a case where 2 soft sheets are bonded to heat-weld the tunnel part 102 of the tunnel body 101. In this figure, (a) shows a tapered channel portion 102 that converges toward the opposite side of the guide portion 104. (b) A passage portion 102 is shown which is contracted toward the opposite side of the guide portion 104 and then its leading end becomes cylindrical. (c) The illustrated passage portion 102 has a portion having a predetermined width on the opposite side of the guide portion 104, and then contracts, and thereafter, the tip thereof becomes cylindrical. (d) A passage portion 102 formed in a cylindrical shape having the same diameter as the guide portion 104 is shown.

The width of the passage portion 102 of the passage body 101 is preferably set to such a degree that gas can smoothly pass through the check valve 3 as a whole. Of course, when the filling operation is performed by a rod-shaped body such as a straw, it is preferable that the size of the rod-shaped body is a size corresponding to the diameter of the inserted rod-shaped body.

As a means for forming the tunnel part 102 in the tunnel body 101, a means for bonding 2 soft sheets to each other and heat-welding the sheet to the anti-deflection sheet 103 is preferable, but it is needless to say that other forming means may be used. When the anti-deviation sheet 103 is welded, only the boundary with the passage portion 102 may be welded.

Fig. 8(a) - (b) show examples of a support body and an elastic body for sandwiching the passage body 101 to open and close, particularly, to automatically seal. The support body 105 is formed separately from the elastic body 106 (not shown). A cover 108 is formed at an end of the support body 105 so as to extend in the left-right direction via a plastic hinge 107. The support body 105, the plastic hinge 107, and the cover body 108 are preferably formed by injection molding a plastic material made of polyethylene, polypropylene, polyester, polycarbonate, or the like into a predetermined shape. Of course, the method of molding is not limited to this injection molding.

In fig. 8(a), holding guide portions 109 are provided to protrude from both upper and lower sides of the support body 105. Further, an insertion guide portion 110 is provided at the center of the upper end of the support body 105 to a position where the rod-like body is inserted.

In the example of fig. 8(a), the cover 108 has a guide groove 112 of an arc cross section formed substantially at the center of the flat plate and receiving the channel 101 passing through the rod-shaped body, and a pair of ribs 113 formed on both sides thereof in the longitudinal direction of the channel 101 and adapted to press the sheet-shaped elastic body 106. The length and shape, position and number of the ribs 113 may be determined appropriately corresponding to the thickness and size of the elastic body 106 described above. However, it is preferable to have a sufficient length, shape, position, and number that do not impair the opening and closing of the elastic body 106.

Reference numeral 114 denotes a hook which is engaged with the end support 105 provided on the cover 108. The hook 114 is fitted into a support opening 115 provided to penetrate through the end of the support body 105 in the thickness direction, and is used to prevent the hook from coming off. By fixing the support body 105 and the elastic body 106 together with the cover body 108 in a state of being bent at a predetermined curvature in this way, the check valve 3 having extremely excellent durability can be obtained.

In the example of fig. 8(b), the cover 108 is formed with ribs 113 for pressing the elastic body 106 to both sides of the guide groove 112 in a direction at right angles to the longitudinal direction of the channel body 101.

In the example of fig. 8(c), the cover 108 is connected to the guide groove 112 having a circular arc cross section at the center from both ends in an inwardly inclined state along the support body 105, and the rib 113 for pressing the elastic body 106 is not formed.

In the above description, the engaging device constituted by the hook 114 and the support port 115 is exemplified, but not only such engaging means, but also means such as sealing the check valve 3 in a cylindrical sheet, using heat welding, or the like, or other shapes and structures may be used.

The support body 105 and the cover body 108 may have the same thickness or different thicknesses. In relation to the channel body 101, the support body 105 and the cover body 108 need to have a thickness that does not deform, the channel body 101 needs to be flexible and therefore has a small thickness, and the elastic body 106 needs to have a predetermined thickness in view of its function. Of course, the elastomer 106 is preferably thicker than the channel body 101.

The material of the channel body 101 and the elastic body 106 may be selected from a plastic sheet, a metal sheet, or a composite sheet made of the same. Examples of the plastic sheet include polyethylene, polypropylene, polyester, and polycarbonate. In this case, it is preferable that the channel bodies 101 be made of the same material.

When the plastic sheet such as polyethylene is used as the thickness of the elastic body 106, the thickness is preferably about 0.1 to 0.5 mm. In addition, in the case of a rectangular shape, the ratio of the horizontal axis to the vertical axis is preferably about 2 to 1.5: 1. For example, the actual dimensions of the axis of abscissa and the axis of ordinate may be 40mm to 25mm, 35mm to 20mm, 30mm to 11mm, and the like.

The radius of curvature when the support 105 and the elastic body 106 are bent is preferably 11mm to 40 mm. At a small curvature, the force with which the support body 105 and the elastic body 106 clamp the passage body 101 is strong, and the reaction of insertion and removal with respect to the tubular body 131 is good. Conversely, when the radius of curvature is increased, the force with which the channel body 101 is clamped between the support body 105 and the elastic body 106 and the increase or decrease in the force during the pressurized transfer or the insertion/removal of the rod-shaped body can be adjusted.

As the material, it is preferable to use a single material for the bag body constituting the package 1, the plastic material and the sheet constituting the tunnel body 101, the support body 105, the elastic body 106, and the cover body 108. For example, it has been confirmed that a material composed of a plastic material or a composite sheet of the plastic material and an aluminum foil or the like is very suitable for solving the above-mentioned problems of the present invention in terms of versatility as a material, processability, disposability after disposal, and the like.

Fig. 9 to 12 show a state in which the check valve 3 is configured by sandwiching the channel body 101 between the support body 105 and the elastic body 106. That is, fig. 9 shows a state in which the support body 105 and the cover body 108 are opened, fig. 10 shows a state in which the elongated pieces constituting the passage body 101 and the elastic body 106 are accommodated along the holding guide portion 109, and fig. 11 shows a state in which the hooks 114 of the cover body 108 are fitted into the center of the support opening 115 of the support body 105 and both sides of the passage body 101. In fig. 11 showing this completed state, the channel body 101 is pressed together with the elastic body 106 to the support body 105 by the rib 113 of the cover body 108.

The check valve 3 thus attached holds the passage body 101 in an arc shape in a state of being bent in accordance with the bending of the support body 105 and the elastic body 106 as shown in fig. 12 and 13, and the cover body 108 is positioned at a chord position thereof. Thus, the shape of the elastic body 106 is held by the cover 108 along the support body 105, and the bending thereof is securely held by the rib 113, thereby firmly pressing the duct body 101.

Next, the operation of the check valve 3 configured as described above will be described.

Fig. 14 shows a state where a straw or other tubular body 131 is inserted into the passage body 101. In this check valve 3, the tubular body 131 is inserted into the channel portion 102 of the channel body 101, so that the channel portion 102 pressed by the support body 105 and the elastic body 106 is released from close contact, and the channel is secured. In this figure, a straw or the like is used as the tubular body 131, and a more reliable passage is ensured.

In fig. 15 for describing the above operation in more detail, the tip 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 duct body 101. In fact, by providing the insertion guide portion to this portion, a shape that is easy to insert the tubular body 131 can be formed. When the tubular body 131 is slowly depressed as shown in fig. (a) to (d), the channel portion 102 of the channel body 101 is pushed away together with each elastic body 106.

When the tubular body 131 is further depressed, the elastic body 106 pushed to the support body 105 by the cover body 108 is pushed along the entire length of the tubular body 131, and gas can freely flow as shown in fig. d. Therefore, the filling operation can be performed easily using the tubular body 131 made of straw or the like.

Conversely, when the passage portion 102 of the passage body 101 is to be closed, the tubular body 131 may be pulled out. That is, the elastic body 106 is gradually returned to the original position and closely contacts the support body 105, and the channel portion 102 of the channel body 101 automatically and closely contacts the entire length again in the reverse order of fig. (d) - (a). At this time, when the check valve 3 applies a pressure to push back the object from the opposite direction, the pressure is transmitted to the passage body 101 through the support body 105 and the elastic body 106, and the passage portion 102 of the passage body 101 is closed.

In the above description, the case where the opening and closing of the tunnel part 102 of the tunnel body 101 is performed by the tubular body 131 made of straw or the like is described, but one end of the tunnel body 101 may be opened to forcibly pass the object through the tunnel part 102 while pressing it against the elastic force of the elastic body 106.

In this way, the check valve 3 prevents the air in the air chamber from flowing back and leaking out, and therefore, the inflated state can be maintained for a long period of time.

As the elastic body 106, a rod-shaped body having elasticity and an elastic tube may be used instead of the sheet-like body, and particularly, a silicon tube may be preferably used as the elastic tube.

When the inflatable cushion package of the present invention configured as described above is used, as shown in fig. 16, the opening 13 of the package 1 is first expanded into a cylindrical shape in a normal state where air does not enter the air chamber, and the object 2 is inserted into the cylindrical opening. After the object 2 is positioned substantially in the middle, the air chamber is inflated by filling the check valve 3 with air.

Conversely, when the object 2 is to be removed, the air is discharged from the check valve 3 by the above-described method, and the air chamber is collapsed to remove the object 2.

As described above, the inflatable cushion package of the present invention can be repeatedly used many times by the entrance and exit of air.

As a more specific utilization method, as shown in fig. 17, a hand bag (1) having a bottle formed by attaching a handle 14 is basically not limited in size, and therefore, the method can be applied to the conveyance (b) of a long article according to the size of an object to be held. In the case of (a), it is preferable to take measures to prevent the object from falling down at the bottom, considering that the air chamber is damaged and the air leaks.

In the case where the sheets constituting the inner and outer walls are different as in the configuration example 1 of fig. 2 and the configuration example 2 of fig. 3, the leakage of air due to damage can be prevented by increasing the thickness of the sheet constituting the outer wall or by using a material which is flexible and tough, that is, has high mechanical strength. Here, the mechanical strength means all means required for evaluating the degree of the flexible sheet less susceptible to injury due to external factors, such as stretching, elasticity, impact resistance, and breaking.

Fig. 18-26 show embodiment 2 of the intumescent cushioning package of the present invention. In the above-described embodiment 1, a type in which a pair of air chambers are directly connected is shown, but in this example, a type in which they are indirectly connected is shown.

That is, in the former example, as shown in fig. 1, since the 2 air chambers are directly connected at both ends, when air is filled into the air chambers, the bent portions are generated in the end weld portions to maintain the straight shape regardless of whether the cross section of the substantially central portion of the package is substantially expanded to a circular shape. The shape of the object to be stored is also influenced by the bending, and the position and the number of times of bending vary, and the shape of the end portion when storing the object is not beautiful.

Therefore, the applicant has found after examination that this problem can be solved by isolating 2 air chambers at regular intervals.

That is, as shown in fig. 18(b) and (c), the joint end 15 of the 2 air chambers is isolated by the connecting portion 16, and the welded portion is formed in a substantially beautiful rectangular shape, which is not affected by the size and dimensions of the object to be stored.

As a result, the shape of the front surface is extremely beautiful not only at the side surfaces but also as shown in fig. (a), and the exhibition of the merchandise or the like is optimized. Further, when the handle 14 is attached, a package of a commodity having high display performance can be formed.

Fig. 19 to 26 show this configuration example.

Fig. 19 shows a case where 3 flexible sheets are used in the 1 st configuration example.

First, 1 sheet 7 folded in two and constituting the inner wall and 3 flexible sheets of 2 flat-plate-like sheets 8A and 8B constituting the outer wall are prepared. (a)

In the sheet size, the width a of the folded-in-half sheet 7 is smaller than the width a of the other sheets 8A, 8B. This is because, when 3 sheets are stacked and welded around, the bent portion 9 of the welding sheet 7 is not welded and this portion is formed as a communicating portion of the air chamber.

The 3 sheets adjusted to have such a size are overlapped as shown in fig. b and welded along the periphery of the sheet 8 (arrow head portion). At this time, the check valve 3 is disposed between the sheets 7 and 8. When welding, more specifically, all the end portions of the sheet 7 except the folded-over portions 9 are welded to the sheet 8. The weld lines 17A and 17B are provided at desired positions above and below. The weld line 17A is provided along the full width, and 17B leaves a communicating portion 18 connecting the 2 air chambers. In this case, when the welded portion is formed in an L-shape as shown in fig. (c), only the communicating portion 18 is formed, and when air is filled, the connecting portion 16 of the bottom portion remains flat as shown in fig. 18(b), and when the welded portion is welded in an open state as shown in fig. 19(d), another air chamber may be further provided in the bottom portion as shown in fig. 18 (c).

(e) Is a longitudinal section view. The state was as a squashed cylinder.

The flexible sheet may be made of a plastic sheet, a metal sheet, or a composite sheet made of the same. Examples of the plastic sheet include polyethylene, polypropylene, polyester, polycarbonate, nylon resin, and the like. These soft sheets or composite sheets may be formed by bonding 2 sheets of the sheets as a material, heat-sealing the periphery thereof with a predetermined width, and heat-welding the periphery, or may be formed by using polyethylene or polypropylene for the outer layer and nylon resin or polyester for the inner layer, for example.

The check valve 3 may be disposed as shown in fig. 20.

Fig. 21 shows a case where 2 flexible sheets are folded in two and used in the 2 nd configuration example.

After folding the sheets in half, the sheets 7 are inserted between the folded sheets 8 with the sheets facing the same direction (b), the check valve 3 is inserted and welded around the sheets 8, and a weld line (c) is provided at a desired position from the upper and lower ends. In this case, the weld line 17A is provided over the entire width, and the weld line 17B has a communicating portion 18 that communicates with 2 air chambers. In this case, when the welded portion is formed in an L-shape as shown in fig. 4, only the communicating portion 18 is formed, and when air is filled, the connecting portion 16 of the bottom portion remains flat as shown in fig. 18 b, and when the welded portion is welded in an open state as shown in fig. 21(5), another air chamber may be further provided in the bottom portion as shown in fig. 18 (3).

(f) Is a longitudinal section view. The state was as a squashed cylinder.

Fig. 22 shows a case where the cylindrical piece is used in the 3 rd configuration example.

First, a tubular flexible sheet as in (a) is prepared, and 4 weld lines are provided at desired positions. Further, the check valve 3 is inserted into 1 end portion, and 2 end portions 10 are welded.

In this case, the weld line 17 is formed with the communicating portion 18 communicating with the air chamber left. However, in the case of 17B, when the welded portion is formed in an L-shape as shown in fig. d, only the communicating portion 18 is formed, and when air is filled, the connecting portion 16 of the bottom portion is kept flat as shown in fig. 18B, but when the welded portion is welded in an open state as shown in fig. 21 e, another air chamber may be further provided in the bottom portion as shown in fig. 18 c.

In this example, since the communication portion is also provided in 17A, a small air chamber is also generated in the upper connecting portion 16 in fig. 18 (c).

(f) Is a longitudinal section view. The cylindrical body is flattened.

Although the most simple configuration, the inner sheet is brought into close contact with the outer sheet at the bent portion, and therefore, the air communication of the air chamber is insufficient, and even when air is filled, the air chamber having only the check valve 3 tends to expand.

Fig. 23 shows a case where the 4 th configuration example is configured by only 1 sheet.

1 flexible sheet is prepared, and a portion 7 constituting an inner wall and a portion 8 constituting an outer wall as shown in the figure (a) are connected to each other. The difference in width of the 2 portions is to weld polyethylene to each other in the case of using a laminate of polyethylene resin (PE) and nylon resin (NY) as the flexible sheet of material. That is, in the figure, the outside is folded with nylon resin and the inside is folded with polyethylene resin. In the case of a composite material such as a single sheet of polyethylene resin or PE-NY-PE, nylon resins which cannot be welded are not in contact with each other, and therefore, may have the same width. This is the same for all embodiments of the invention.

Subsequently, the check valve 3 is folded in two with the check valve interposed therebetween as shown in (B), and welded along the end portions to form a weld line 17B. Further, as shown in (c) and (d), the end portion 12 is folded in two and then welded.

When the weld portion is formed into an Contraband shape, the weld line 17A forms only the communication portion 18, and when air is filled, the connecting portion 16 of the bottom portion is kept flat as shown in fig. 18(b), and when the weld portion is welded in an open state as shown in fig. 23(c), another air chamber may be provided in the bottom portion as shown in fig. 18 (c).

Fig. 24 shows a bending prevention member of the air chamber communication portion 18.

In the methods shown in fig. 4, 5, 22, and 23, as shown in fig. 24(d), the sheet 7 constituting the inner wall and the sheet 8 constituting the outer wall are in close contact at the bent portion, and communication between the air chambers 4 and 5 cannot be secured, and the air flowing in from the check valve 3 is expanded only in the air chamber 4 on the side having the check valve 3 without passing through the communication portion 18, and the 2 air chambers cannot be expanded in a well-balanced manner, and therefore, there occurs a problem that the position of the stored object cannot be determined.

Therefore, by inserting the close contact prevention member 19 formed of an elastic body into the communicating portion 18, the communicating portion 18 is secured as shown in fig. 24(e), and therefore, the air chamber can be expanded substantially uniformly.

The close contact preventing member is formed in a shape in which the vertical ribs are formed in the planar member in the drawing, but may be formed in a shape having a channel secured with appropriate flexibility and elasticity, instead of the shape shown in the drawing, a cylindrical body, or the like.

Fig. 25 shows a configuration example 5, which is an improved configuration of the air chamber communication method.

As shown in the figure, 2 superposed pouches are formed by using 2 flexible sheets 11 slightly different in width or 1 flexible sheet 11 different in width dimension at the center. The separate use of these material sheets is determined by the laminate construction of the composite sheet.

That is, for example, when a laminate sheet of PE-NY is used, it is necessary to overlap and weld PE surfaces facing each other. In this case, in order to weld the both ends 22 in the step (e), the width of the overlapped 2 sheets must be adjusted so that the PE surface of the sheet located below is exposed. This is not necessary in the case of a laminate of PE-NY-PE.

First, 2 flexible sheets 11 are stacked or 1 flexible sheet 11 is folded in two, and then the periphery of the check valve 3 and the check valve attachment portion 20 on only one side are welded without interruption. At this time, as shown in the figure, the weld line 21 in the height direction is located inward from the left and right ends 22 to a predetermined dimension. This dimension is half the dimension (D: D/2) of the interval of the central breaking weld line 23. Thus, the air chamber is formed in only 1 place of the opening, and leakage can be prevented. Further, by providing 2 breaking weld lines 23 parallel to each other across the check valve attachment portion 20, 3 air chambers (24A, 24B, 24C) are provided. The breaking weld line 23 is in the form of a broken line, and 3 air chambers communicate with the non-welded portion.

When the welding for forming the 3 air chambers is completed, the check valve 3 is inserted into the opening 20 sandwiched by the rupture welding lines 23 and welded and fixed.

Then, the flexible sheet 11 is folded in two as shown in (d), and the left and right ends 22 are aligned and welded.

When the material sheet is used after folding 1 sheet (roll sheet or the like) continuous in the width direction in fig. (b), for example, the folding position is substantially at the center in the width direction of the sheet (height direction in fig. (b)), the widths of the folded upper and lower sheets are made different and cut along the folding line, and the centers in the width direction of the two sheets are aligned to reach step (c).

When the inflatable cushion package having such a structure is used, air is injected from the check valve 3 as shown in fig. 26(a), the air chamber 24B in the center expands first, and then air flows into the air chambers 24A and 24C on both sides from between the rupture weld lines 23, so that air flows into both air chambers equally as shown in fig. (B). Therefore, the object 2 can be easily accommodated in the center of the package.

Fig. 27 shows a 6 th configuration example.

In the figure, 2 cylindrical flexible sheets are prepared, the sheet 6 is inserted into the sheet 7 and overlapped, and 2 (4 in total) breaking weld lines 23 are provided in parallel at desired intervals at respective opposite positions. Here, it is divided into 4 parts in the circumferential direction. The check valve 3 is sandwiched between the inner and outer sheets 6 and 7 at the end portions of the narrow portion sandwiched by the rupture weld lines 23, and both ends of the cylindrical sheet are welded together.

With this configuration, as shown in fig. 28, the inflatable cushion package is configured with air chambers all communicating with each other.

In the case of the above-described configuration, it is not necessary to use a sheet cut into a square shape in advance and a flexible sheet formed into a tubular shape, and if a continuous sheet in manufacture is used and a structure similar to the invention described in the claims is finally formed by a welding and cutting process appropriately arranged, the method and configuration of formation are not limited, and any technique conceivable by those skilled in the art may be substituted and applied.

The inflatable cushion package of the present invention can be filled with not only air but also various gases, liquids, and the like.

According to the present invention, it is possible to provide an expansion body which can reliably hold a conveyed article at a predetermined position by using a high-performance automatic closing check valve, does not apply an impact or a large vibration to the conveyed article, and can be used regardless of the shape of the conveyed article.

In addition, the inflatable body of the present invention can be simply folded after use, stored in a very compact form, and repeatedly reused many times by the outflow and inflow of other fluids, so that it also plays a role in protecting valuable resources. The self-closing check valve has sufficient durability even when repeatedly used, and thus can maintain the performance as a cushion material for a long period of time.

Claims

1. An inflatable cushion packaging body, which is an air bag having at least a pair of opposing air chambers made of flexible sheets, the air chambers having automatic check valves, and after an object is accommodated in a space sandwiched between the opposing air chambers, the air chambers are filled with gas, and the object is pressed and held by the expansion of 2 opposing air chambers, characterized in that:

the automatic check valve is characterized in that both sides of an openable and closable channel body made of a flexible sheet are clamped by a support body bent at a predetermined curvature and an elastic member capable of being in close contact therewith, and at the same time, the channel body and the elastic member are clamped by the support body and a cover body bent at the predetermined curvature and engaged by an engaging means, the elastic member is pressed by the cover body along the support body in a state bent at the predetermined curvature, the channel body is closed in a normal state, and when a rod-shaped body is inserted into the channel body between the support body and the elastic member, the elastic member is deformed, the channel body is opened, and when the rod-shaped body is pulled out, the elastic member is in close contact with the support body under the action of a restoring force to close;

the pair of air cells facing each other is formed by folding 1 sheet of flexible sheet in half, welding the periphery, folding the periphery in half, and then overlapping the welded ends, and the pair of air cells facing each other are communicated with each other through an air passage, and the pair of air cells facing each other are separated from a desired space by a smaller air chamber.

2. The intumescent cushioning package of claim 1, wherein: the pair of opposing air chambers are formed by sandwiching 1 folded flexible sheet with 2 flexible sheets and welding the periphery.

3. The intumescent cushioning package of claim 1, wherein: the pair of air chambers facing each other is formed by sandwiching and welding the 1-fold flexible sheet with the other 1-fold flexible sheet.

4. The intumescent cushioning package of claim 1, wherein: the pair of air chambers facing each other is formed by folding the cylindrical flexible sheet in two and welding the end portions.

5. The intumescent cushioning package of any of claims 1-4, wherein: an air passage bending prevention member is inserted into the air passage.

6. The intumescent cushioning package of any of claims 1-4, wherein: one of the flexible sheets constituting the inflatable cushion packaging body on the outer skin side is thicker than the other sheet on the inner skin side.

7. The intumescent cushioning package of any of claims 1-4, wherein: one of the flexible sheets constituting the inflatable cushion packaging body on the outer skin side has higher mechanical strength than the other sheet on the inner skin side.