JP6323349B2 - How to use buffer packaging - Google Patents

Description

  The present invention provides an inflated space filled with a fluid such as air between the inner and outer double wrapping bodies, and is housed inside by an inner wrapping body projecting inward by filling the inflating space with the fluid. In particular, the present invention relates to an enclosure port structure that enables more reliable fluid sealing according to the purpose and situation.

  Conventionally, as this type of shock-absorbing wrapping tool, a sealed expansion space filled with air or the like is provided between the inner and outer double packaging bodies, and an article stored inside can be held by filling the expansion space with a fluid. A buffer wrapping tool has been proposed (see, for example, Patent Document 1). As a fluid sealing port structure in such a buffer wrapping tool, as described in Patent Document 1, a flat cylindrical shape formed by stacking a thermoplastic resin sheet and thermally welding both side edges excluding the central portion. The body is sandwiched between the expansion space and the outer boundary, thereby allowing the expansion space and the outside to communicate with each other through a flow path along the central portion of the cylindrical body, and the region protruding into the expansion space of the cylindrical body is filled inside. A check valve that closes the flow path by bringing the sheets into close contact with each other by the pressure of the fluid is widely used.

  In such a conventional buffer packaging device, when filling the expansion space with a fluid, a tube such as a straw is inserted into the flow path of the cylindrical body, and the fluid is sealed through the tube. By removing, the flow path in the region protruding into the expansion space is closed by the action of the check valve, and the fluid is sealed. When the fluid is discharged from the expansion space, a pipe is inserted into the flow path, and the liquid is discharged through the pipe. In this way, the check valve is not destroyed at all and can be reused.

  However, the conventional shock-absorbing packaging device has a problem that the fluid sealing performance is not sufficient and the fluid gradually leaks, and the shock-absorbing effect cannot be maintained particularly for a long time. That is, in the above-described sealing port structure of the conventional shock-absorbing packaging device, since the fluid is sealed by the close contact between the sheets of the cylindrical body by the pressure of the filled fluid, for example, when the article moves and the packaging body deforms, the cylinder The boundary part that sandwiches the sheet is also deformed, and this causes a force to act on the tubular body, and the adhesion between the sheets decreases only by the minute movement of the sheets in close contact with each other. As a result, the fluid leaks little by little. In addition, if the cylindrical body is attached at an incline when it is attached to the boundary portion, there is a problem that the cylindrical body is twisted due to the fluid filling and the adhesion force is similarly reduced.

  Since the tube is inserted in the flow path between the sheets when filling the fluid, small scratches occur and the sheet remembers its shape, and it can be easily attached to the cylindrical body with a small external force Power tends to decline. When the fluid leaks in this way, the adhesion force further decreases, and the leak does not stop easily. Therefore, for example, when managing goods as a long-term inventory in a state where the article is stored and held in a buffer wrapping tool, the fluid leaks when actually transported and the like, and the buffering effect cannot be sufficiently exhibited. was there. In addition, when transporting in an environment such as air mail where the change in atmospheric pressure is large, there is also a problem that the adhesion force between the sheets rapidly decreases and the fluid leaks. Anxiety also arises when carrying broken objects.

JP 2002-104521 A

  Therefore, in view of the situation described above, the present invention intends to solve the problem such as long-term storage, transportation by air mail, transportation of cracks, etc. The purpose of the present invention is to provide a buffer packaging device having a sealing package structure that can be reused as usual and has excellent convenience, and a buffer packaging device having the structure.

  In order to solve the above-described problems, the present invention provides an inner packaging that is provided with an expansion space filled with a fluid such as air between the inner and outer double packaging bodies, and that projects inward by filling the expansion space with the fluid. An enclosure opening structure for filling and enclosing / extracting fluid in the expansion space in a buffer wrapping tool for holding an article housed inside by a body, wherein both side edges excluding the central portion are overlapped with a thermoplastic resin sheet. A flat cylindrical body formed by heat welding is sandwiched between the expansion space and an external boundary, thereby allowing the expansion space and the outside to communicate with each other through a flow path along the central portion of the cylindrical body, A region of one end opening side of the cylindrical body that protrudes into the expansion space is a check valve that closes the flow path by bringing the sheets into close contact with each other by the pressure of the fluid filled therein, and projects to the outside of the cylindrical body The area on the other end opening side is Close passage providing a filling port structure of cushioning packing device characterized by comprising a heat seal region.

  Here, the heat sealing region preferably has a length of 10 mm or more.

  Further, the boundary portion is a heat welding portion for heat-welding inner and outer packaging bodies, and a thermal welding prevention layer is provided at a position corresponding to the boundary portion on the inner surface of the sheet facing the flow path of the cylindrical body. In the thermal welding of the boundary portion, the cylindrical body is sandwiched between inner and outer packaging bodies and thermally welded, so that the flow path communicating with the inner and outer sides is maintained by the thermal welding prevention layer, and the heat A structure in which the region on the opening side of the other end with respect to the welding prevention layer is used as the heat sealing region is preferable.

  Moreover, this invention also provides the buffer packaging tool which has the enclosure opening structure which concerns on these this invention.

  In addition, the present invention provides an expansion space filled with a fluid such as air between the inner and outer double packaging bodies, and is accommodated inside by the inner packaging body projecting inward by filling the expansion space with the fluid. A cushioning packaging device for holding a stored article, and as a sealing port structure for filling and filling and discharging fluid in the expansion space, both sides except for the central part are heat-welded by overlapping thermoplastic resin sheets The flat cylindrical body formed is sandwiched between the expansion space and an external boundary portion, and thereby the expansion space and the outside are communicated with each other through a flow path along the central portion of the cylindrical body. The one end opening side region protruding into the expansion space of the cylindrical body is a check valve that closes the flow path by bringing the sheets into close contact with each other by the pressure of the fluid filled therein, and the other protruding outside the cylindrical body The region on the end opening side is connected to the flow path by heat welding. In the case of providing a sealing structure as a heat-sealing region and filling the expansion space with a fluid, a tube is inserted into the flow path of the cylindrical body, the fluid is sealed through the tube, and after sealing, By pulling out the tube, the flow path in the region on the one end opening side that protrudes into the expansion space is closed by the action of the check valve. In the case of releasing the double sealing state by opening and sealing the heat-sealed region protruding to the heat-sealed portion, the heat-sealed portion of the heat-sealed region is cut to form an opening, When the fluid is discharged from the expansion space, a method of using the shock-absorbing packaging device is also provided, wherein a tube is inserted into the flow path from the opening and the liquid is discharged through the tube.

  According to the above-described packing opening structure and buffer packaging device according to the present invention, when the article is stored and held for a long period of time or when it is transported by air mail, it is broken. Depending on the situation, in addition to sealing with a non-return valve, depending on the situation, the sheets in the heat-sealed area are heat-sealed to block the flow path double, ensuring more reliable fluid sealing. Is possible. In other words, it can be used by sealing only with a check valve, or in the above situation, the sheets in the heat sealing region are further sealed and double sealed together with the check valve. The structure can also be used in a state, and such a structure is realized by a simple structure in which a heat sealing region is provided, and can be provided at low cost.

  When used in a double sealed state, when the fluid is discharged and the article is taken out, it can be easily done by simply cutting the heat-sealed portion of the heat-sealed area and inserting the tube into the flow path as before. . Even if the heat welded part is cut off, the fluid is not discharged immediately but the sealed state by the check valve is maintained. For example, after long-term storage, the heat welded part is cut off before transporting, and the check is made. It can be transported in a sealed state with only the valve, or it can be heat-sealed in the heat-sealed area only while it is transported by air mail, and after transporting, the heat-welded part can be excised and transported by another transport means. It becomes possible.

  In addition, since the function as a check valve is maintained after the heat-welded portion is excised, the fluid can be charged and discharged again, and reuse can be performed without any problem. In any case, it is easy to heat-weld the heat-sealed region or cut the welded part, and as described above, various usage methods can be used, and a convenient shock-absorbing package can be reduced with a simple structure. Can be realized at cost.

  Moreover, since the length of the heat sealing region is set to 10 mm or more, double sealing and excision of the heat welded portion can be repeated twice or more, and convenience can be improved.

  Further, the boundary part is a heat welding part for heat-welding the inner and outer packaging bodies, and a thermal welding prevention layer is provided at a position corresponding to the boundary part on the inner surface of the sheet facing the flow path of the cylindrical body, The tubular body is sandwiched between the inner and outer packaging bodies during the thermal welding of the boundary portion, and is heat-welded so that the flow path communicating with the inner and outer sides is maintained by the thermal welding prevention layer, thereby preventing the thermal welding. Since the region on the opening side at the other end from the layer is used as a heat sealing region, the flow path and the heat sealing region are maintained only by sandwiching the cylindrical body at the time of the thermal welding of the boundary portion. Can be easily manufactured to the state.

  Specifically, when filling the expansion space with a fluid, a tube is inserted into the flow path of the cylindrical body, the fluid is sealed through the tube, and after sealing, the tube is pulled out to protrude into the expansion space. The flow path in the region on the one end opening side is closed by the action of the check valve, and a single sealed state is obtained. You may use in this state, and also when using as a double sealing state, it becomes a double sealing state by opening-sealing the heat sealing area | region which protruded outside by heat welding. At the time of this heat welding, since it is already in a single sealed state by the check valve, the pressure of the fluid does not act on the heat sealing region, so that the heat welding can be easily performed.

  Further, when releasing the double sealed state, the heat sealing portion of the heat sealing region is simply cut out to form an opening, and the fluid is discharged to take out the stored article. The conventional method can be performed by inserting a tube into the flow path from the opening and discharging the liquid through the tube, and can be reused as usual.

(A) is a longitudinal sectional view showing a shock-absorbing packaging device according to a representative embodiment of the present invention, (b) is a cross-sectional view taken along the line AA of the shock-absorbing packaging device (in a state where the air is slightly inflated with a little air), ( c) is a cross-sectional view taken along the line B-B (a state where the air is slightly inflated with a little air). Explanatory drawing which similarly shows the manufacture procedure of the cylindrical body which comprises the enclosure opening structure of a buffer packaging tool. The enlarged view of the principal part which similarly shows an enclosure port structure. The perspective view which shows the use condition which similarly accommodated the article | item in the buffer packaging tool. The longitudinal cross-sectional view which shows a use condition similarly. The cross-sectional view which shows a use condition similarly. Explanatory drawing which similarly shows the usage method of a buffer packaging tool.

  Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  As shown in FIG. 1, the sealing port structure S of the present invention is provided with an expansion space E filled with a fluid such as air between the inner and outer double packaging bodies (the inner packaging body 2 and the outer packaging body 3). The enclosure opening structure provided in the buffer wrapping tool 1 that holds the article G stored inside as shown in FIGS. 4 to 6 by the inner packaging body 2 projecting inward by filling the expansion space E with fluid. S is an enclosure port structure for filling, filling, and discharging a fluid in the expansion space E.

  Specifically, as shown in FIGS. 2 and 3, the sealing port structure S is formed by overlapping the thermoplastic resin sheets 51 and 52 and heat-bonding the side edges 51 a and 52 a and 51 b and 52 b to each other excluding the central portion. It has a structure in which the flat cylindrical body 5 formed by bonding is sandwiched by a boundary portion B between the expansion space E and the outside (a bonding portion 44 described later in this example). A central portion 50 excluding the joint portions 53 and 54 on both side edges of the cylindrical body 5 serves as a flow path F that allows the expansion space E to communicate with the outside. Discharged.

  The region R1 on one end opening side that protrudes to the expansion space E side of the cylindrical body 5 functions as a check valve that closes the flow path by bringing the sheets into close contact with each other by the pressure of the fluid filled inside, and to the outside. The predetermined area | region by the side of the other end opening which protruded becomes heat sealing area | region R2 which closes a flow path by heat welding.

  By providing the heat sealing region R2 in this manner, for example, when the article is stored in a state where it is stored and held for a long period of time, or when it is transported by air mail, the fluid is sealed. In addition to the sealing by the check valve function in the region R1, the sheet in the heat sealing region R2 can be thermally welded to form a double sealed state in which the flow path F is closed.

  Hereinafter, the present embodiment will be described more specifically.

  As shown in FIG. 1 (b), the shock-absorbing packaging main body excluding the sealing opening structure S is continuously or intermittently provided along the axial direction at three locations in the circumferential direction of the expansion space E surrounding the article G. Joint portions 41, 42, 43 in which the packaging bodies 2, 3 are joined are provided. The expansion space E is divided into three small expansion spaces e1, e2, e3 in the circumferential direction by these three rows of joint portions 41-43.

  Then, by filling the fluid, the inner package 2 constituting each small expansion space projects inward and the outer package 3 projects outward, and as shown in FIG. 6, the small expansion spaces e1, e2, e3 are respectively cushion materials. At the same time, each part (inner surface 21, 22, 23) of the inner package 2 projecting inwardly pushes the article G stored in the inner space P from the three directions and holds it in a stable posture.

  In this example, as shown in FIG. 1, three rows of joint portions 41, 42, and 43 are provided at substantially equal intervals in the circumferential direction, and the inner package body 2 and the outer package body 3 are substantially right in cross-section. Triangular. Therefore, especially when filling the fluid and filling the inner package 2 inward, the surplus space P surrounded by the respective portions (inner surfaces 21, 22, 23) can be made into a very small space, and from the three surroundings. In order to press evenly, even if the article G is thin, it can be held firmly and firmly in the center position.

  However, the present invention is not limited to the one in which the three small expansion spaces e1, e2, e3 are formed by the three joint portions 41, 42, 43. In this example, at least two rows of the joint portions 42 and 43 out of the three rows of joint portions 41 to 43 are provided with non-joined portions at least partially along the axial direction so that the small expansion spaces to be separated communicate with each other. The joints are intermittently joined in the provided axial direction, and all of the small expansion spaces communicate with each other.

  More specifically, the joint portion 41 is continuously welded in the axial direction to integrally join the inner and outer packaging bodies 2 and 3, and the joint portions 42 and 43 are intermittently thermally welded to the inner and outer packaging. The bodies 2 and 3 are integrally joined. Thereby, as can be seen from FIG. 1C and FIG. 6, the small expansion spaces e 1, e 2, e 3 communicate with each other through a non-joined portion between the joint portions 42 and a non-joined portion between the joint portions 43. Is doing. Therefore, if the sealing port structure S communicating with the outside is provided in one of the small expansion spaces (e2 in this example), the fluid can be efficiently filled into all the small expansion spaces at once through this. The joining portion may be joined with an adhesive other than heat fusion.

  In addition, in this embodiment, since the inner and outer packaging bodies 2 and 3 are formed into a cylindrical shape at one joint portion (joint portion 41) at the same time, the joint portion 41 is continuously joined. Separately, the inner and outer packaging bodies 2 and 3 that are individually formed in a cylindrical shape are double stacked, and all of the joints are intermittently joined to form a single communication space. It is. Further, two or more of the joints may be continuously joined, and thereby one or all of the small expansion spaces may be independent sealed spaces. In that case, the fluid sealing port structure S may be used. What is necessary is just to provide for each independent space.

  The inner package 2 and the outer package 3 are made of a thermoplastic resin sheet such as polyethylene resin, polyethylene terephthalate resin, or polypropylene resin. A single material sheet may be used, or multiple types of resin layers or a composite sheet of a resin layer and a metal layer may be used.

  As described above, the cylindrical body 5 constituting the sealing port structure S is obtained by superimposing the thermoplastic resin sheets 51 and 52 and heat-welding both side edges except for the center portion as the thermoplastic resin sheets 51 and 52. Can use the same material as the sheet material of the inner packaging body 2 and the outer packaging body 3 of the buffer packaging body, and is made of a thermoplastic resin sheet such as polyethylene resin, polyethylene terephthalate resin, polypropylene resin, etc. It may be a raw material sheet, or a composite sheet of various types of resin layers or resin layers and metal layers.

  Of the axial direction (length direction) along the flow path F of the cylindrical body 5, the sheet inner surface in a range including the portion sandwiched by the boundary portion B (joint portion 44 in this example) is shown in FIGS. 3, a thermal welding prevention layer 55 is provided so that the flow path of the cylindrical body 5 is not blocked during the thermal welding for sandwiching the cylindrical body 5 simultaneously with the formation of the joint portion 44. It has been. The range in which the heat-welding prevention layer 55 is provided may be the range of the boundary portion B that is heat-welded when the joint portion 44 is formed, but is longer by a predetermined length in the inner and outer directions along the axial direction in manufacturing. A range is provided.

  Accordingly, in this example, the heat-welding prevention layer 55 extends a predetermined length from the boundary B to the other end opening side outside, but the extension range does not function as a heat-sealing region. When the heat sealing region R2 is set except for the region, the length and the like are set based on the position of the end portion on the outside (the other end opening) side of the heat welding prevention layer 55 as shown in FIG. The

  As such a heat-welding prevention layer 55, a conventionally known heat-welding prevention layer such as a non-welding paste applied to the inner surface of the sheet 52 or a non-welding sheet laminated on the inner surface of the sheet 52 can be employed. For example, when the sheets 51 and 52 are made of polyethylene resin, PET, nylon, or the like that does not have heat sole properties can be used, and other materials are also possible. Further, in this example, the sheet 51 is provided on one inner surface (the inner surface of the sheet 52) of the sheets 51 and 52, but may be provided on both inner surfaces.

  As described above, the heat sealing region R2 is a region from the end portion to the opening of the heat welding prevention layer 55, and its length is long so that double sealing and excision of the heat welding portion can be repeated twice or more. The thickness is set to 10 mm or more.

  In addition, when forming the said boundary part B (joining part 44) by heat welding instead of providing the heat welding prevention layer 55, even if it inserts heat welding prevention materials, such as paper, inside the cylindrical body 5 Good. In this example, the cylindrical body 5 is sandwiched between the joint portions 44, but may of course be sandwiched between other joint portions serving as the boundary portion B, for example, the joint portion 41.

  The fluid filled in the expansion space E may be a gas such as air or an inert gas, or a liquid such as water. What is necessary is just to select the sheet | seat raw material which comprises an inner / outer package body and a cylindrical body according to the fluid.

  When the expansion space E is filled with fluid through the tubular body 5, a tube such as a straw is inserted into the flow path F of the tubular body 5 and the fluid is sealed through the tube. When the tube is pulled out after the sealing, the flow path in the region R1 protruding into the expansion space E is closed by the fluid pressure and is in a single sealed state as in the conventional sealing port structure.

  Although it may be used in this state, when it is used in a double sealed state, as shown in FIG. 7A, the heat sealing region R2 is sealed by heat welding (heat sealing). Part 6). This results in a double sealed state. At the time of this thermal welding, since it is already in a single sealed state, fluid pressure does not act in the flow path of the thermal sealing region R2, and thus thermal welding can be easily performed.

  In order to release the double sealing state, as shown in FIG. 7B, the heat sealing portion 6 in the heat sealing region is simply cut away to form the opening 7. Even if the heat-sealed portion 6 is excised, the fluid is not immediately discharged, but a single sealed state by the check valve is maintained. Therefore, it is possible to continue and transport and store the single sealed state. Further, when the article stored therein is taken out by discharging the fluid, it is possible to insert a tube into the flow path from the opening 7 and discharge the liquid through the tube, as in the conventional case.

  Further, even after the heat sealing portion 6 is excised, the heat sealing region R remains depending on the length setting, and again becomes a double sealed state as shown in FIGS. Can be reused without problems.

  Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and can of course be implemented in various forms without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 Buffer packaging tool 2,3 Packaging body 5 Cylindrical body 6 Heat sealing part 7 Opening 21-23 Inner surface 41-45 Joining part 50 Center part 51,52 Sheet | seat 51a, 51b Side edge 52a, 52b Side edge 53 Joining Part 55 Thermal welding prevention layer B Boundary part E Expansion space e1, e2, e3 Small expansion space F Flow path G Article P Space R1, R2 area S Sealing port structure

Claims (1)

An expansion space filled with a fluid such as air is provided between the inner and outer double packaging bodies, and a buffer for holding articles stored inside by the inner packaging body projecting inward by filling the expansion space with the fluid. A method of using the packaging tool,
As an enclosure port structure for filling and discharging fluid in the expansion space,
A flat cylindrical body formed by heat-welding both side edges excluding the center part by overlapping the thermoplastic resin sheet is sandwiched between the expansion space and the outer boundary part,
This allows the expansion space to communicate with the outside through a flow path along the central portion of the cylindrical body,
A check valve that closes the flow path by bringing the sheet into close contact with the pressure of the fluid filled inside the one end opening side region protruding into the expansion space of the cylindrical body,
An area on the other end opening side that protrudes to the outside of the cylindrical body is provided with a sealing port structure that serves as a heat sealing area that closes the flow path by thermal welding,
When filling the expansion space with a fluid,
Inserting a tube into the flow path of the cylindrical body,
Enclosing fluid through the tube;
After sealing, by pulling out the tube, it is in a sealed state in which the flow path in the region on the one end opening side protruding into the expansion space is closed by the action of the check valve,
Furthermore, when making a double sealed state,
The heat sealing region protruding to the outside is sealed by thermal welding,
When releasing the double sealed state,
Excising the heat sealing part of the heat sealing region to form an opening;
Furthermore, when discharging the fluid from the expansion space,
A tube is inserted into the channel from the opening;
A method of using a shock-absorbing packaging device, wherein the liquid is discharged through the tube.

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