Method for fixing and releasing object to be transported, and packing bag with check valve for use therein

Abstract

To provide a method for fixing and releasing an object to be transported, in which the object to be transported is enclosed by using a container capable of containing the object to be transported and a bag capable of being inflated with air and communicating with or sealed from external air via a check valve.SOLUTION: The present invention provides a method for fixing and releasing an object to be transported, where the object to be transported is composed of one or a plurality of objects of any shape and size. In this method, at the source of transportation, each object is placed at any position in a container, and a bag is placed in the gap. The bag is inflated to fix each object inside the container in a state where means for supplying gas in pressurizable manner while regulating the internal pressure is fluidly connected to the inside of the bag via a check valve, and the air is released from the bag, releasing each object from within the container.SELECTED DRAWING: Figure 7b

Description

[Technical field]

[0001] The present invention relates to a method for fixing and releasing an object to be transported, which allows one or more objects of different sizes, etc. to be packed in any position in a container at the source of transport without problems of shifting or shaking during transport, and which allows the objects to be easily removed at the destination of transport, as well as a packaging bag with a check valve used for this method. [Background technology]

[0002] As logistics becomes more active, it is becoming increasingly important to reduce transportation costs. In particular, in recent years, it has become mainstream to standardize the containers (such as cardboard boxes) used for packing products into a few types, rather than matching them to the size and shape of the products being transported, and enclose one or more items that fit the containers, thereby ensuring the amount of cargo that can be loaded onto a transport truck per trip and simplifying the loading process, thereby reducing transportation costs.

[0003] In this type of transportation, the container and the object to be transported do not match, so gaps occur between the inner wall of the container and the object, and if the object is packed and transported in this state, there is a risk that the object will shift or shake inside the container during transportation and be damaged. To prevent this, it has been necessary to fix the object inside the container when packing it. However, fixing the object inside the container when packaging it at the shipping destination increases the labor and costs involved in using extra fixing materials and labor.

[0004] There is also a method of protecting and fixing the object by filling the gaps between the object and the container with granular polystyrene foam or bubble cushioning material such as "Puchi-Puchi: registered trademark", but the amount of granular material or bubble cushioning material required, how to fill the gaps, and how to wrap the object depend on the experience of the worker, which increases labor costs and makes it difficult to fix the object regularly. Furthermore, storage space is required at the source of the granular material or bubble cushioning material. In addition, there are problems such as cumbersome work and environmental burden when disposing of the object at the destination, and even bubble cushioning material such as that in Patent Document 1, which has been improved in this respect, cannot be said to be sufficient.

[0005] On the other hand, in recent years, there are packaging materials such as those described in Patent Documents 2 and 3, which are provided with check valves for intake and exhaust in a bag that can be inflated by putting gas inside, and which can be filled with the inflated packaging material at the source of transport to prevent shifting and shaking during transport, and can be deflated and folded up at the destination of transport to store and store compactly. However, even with such packaging materials, if the size and shape of the gap between the object of transport and the container at the source of transport are not specified, the amount of gas to inflate the packaging material is not clear, and no proposal has been made on what means to inflate the packaging material at the source of transport. In addition, no proposal has been made on a means to deflate the gas at the destination of transport. Therefore, in order to actually pack the product at the source of transport and store (or dispose) the product at the destination of transport, it is necessary to rely on the intuition and experience of the work, and there is currently no method of achieving quick and labor-saving packing and storage work. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2019-043668 A [Patent Document 2] JP 2020-117261 A [Patent Document 3] JP 2016-43934 A Summary of the Invention [Problem to be solved by the invention]

[0007] The present invention was created in consideration of the above problems, and has as its object to provide a method for fixing and releasing an object to be transported, which allows one or more objects of different sizes, etc. to be packed in any position in a container at the source of transport without problems of shifting or shaking during transport, and which allows the objects to be easily removed at the destination of transport, as well as a packaging bag with a check valve for use therein. [Means for solving the problem]

[0008] In order to achieve the above object, the present invention provides A method for fastening and releasing an object to be transported, which includes a container capable of containing the object to be transported, and a bag capable of being inflated with air and communicating with or closing the bag from outside air by a check valve, the method comprising the steps of: The object to be transported is composed of one or more objects of any shape and size, and the method for fixing and releasing an object to be transported comprises placing each object at an arbitrary position in a container at the source of transport, disposing the bag in the gap, fixing each object in the container by inflating the bag while a means for supplying gas in a pressurizable manner while adjusting the internal pressure is fluidly connected to the inside of the bag via the check valve, and releasing the fixation of each object in the container by removing the air from the bag.

[0009] In the method of fixing and releasing an object to be transported of the present invention, the object to be transported is placed in a container for packaging such as cardboard, and air is pumped into a bag having a check valve in the gap between the container and the object while adjusting the internal pressure, thereby utilizing the shape freedom and elastic force (repulsive force) of the air to fix (position) the object in the container. According to this method, by simply placing a shrunken bag in the gap between the container and the object to be transported to a certain extent, the bag inflates along the shape of the gap and abuts against the object in the process of supplying air to the bag, regardless of the size, shape, number, or position of the object in the container, and the elastic force of the air can firmly fix the object in the container. As a result, it is possible to prevent the object from shifting or shaking during transportation and avoid damage to the object during transportation.

[0010] In addition, the method of the present invention only requires adjusting the internal pressure by adding air while pressurizing or depressurizing the bag at the shipping source, so fixing the object inside the container does not depend on the experience of the worker, as is the case when packing granular polystyrene foam, and it also reduces the work time and manpower required. Furthermore, the object can be easily and quickly removed from the container by degassing the air inside the bag to a certain extent at the shipping destination, and after removing the bag, the air inside the bag can be degassed in an open space outside, and then the bag can be compactly stored and reused. As a result, it is possible to simultaneously achieve cost reductions due to reduced manpower and work time at the shipping destination, and reductions in the environmental load due to disposal.

[0011] In addition, a method of fixing and releasing the objects to be transported in this manner preferably involves, when releasing the fixation of each of the objects within the container by evacuating the air from the bag, inserting the distal end of a nozzle that reaches beyond the check valve of the bag to connect it to the outside, thereby creating an environment in which the internal pressure of the bag is reduced and the bag is degassed.

[0012] In the present invention, when degassing the air inside the bag at the destination, a nozzle that reaches beyond the check valve and opens the valve is inserted, thereby opening the check valve and forming an air flow path from inside the bag to the outside, and forced degassing can be easily achieved by the difference between the internal pressure inside the bag and the air pressure outside.

[0013] In a preferred method for fixing and releasing an object to be transported, the means for supplying gas in a manner that allows pressure to be increased while adjusting the internal pressure is a pressurizing and depressurizing means provided with a depressurizing means for degassing the gas by reducing the pressure, and the nozzle is inserted with its distal end reaching the tip of the check valve of the bag, and the proximal end of the nozzle is fluidly connected to the pressurizing and depressurizing means, thereby forcibly degassing the bag.

[0014] According to this method, the pressurizing means for inflating the gap between the container and the object to be transported at the transport source is also provided with a decompression means, and the decompression means is connected to the proximal (external) end of the nozzle. According to this method, in addition to forming a degassing flow path for the air in the bag by inserting the bag into the tip of the check valve at the transport source, the degassing means is forcibly used from the proximal (external) end of the nozzle, so that the air in the bag can be quickly and completely removed. Therefore, at the transport source, the bag can be easily folded into a foldable sheet shape in a short time regardless of the worker, which makes it easy to store in a narrow space and creates a storage situation that makes it easy to reuse when it becomes the next transport source. This is in line with the recent demand for reducing environmental load, and is particularly beneficial in light of the social situation in which person-to-person transportation has developed.

[0015] In addition, the bag may include at least two bags, and when the objects are placed in the gap in a state where the objects are placed in any positions in the container at the transportation source, forming a continuous path over the entire gap in a top view while the top surface side of the container is open, disposing at least one bag over the path, and then inflating the bag; It is preferable to form a continuous path throughout the entire gap in a side view with the top side of the container open, arrange at least one other bag along the path, and then inflate the other bag with the top side of the container closed.

[0016] In this method, when packing and inflating packing bags into gaps in a packing container at the transport source to fix them, first prepare two or more packing bags, open the top of the container, put one or more objects into the bags, and place them at any position. At this time, the gap between the container and the objects to be transported is formed so as to be continuously connected in a zigzag pattern in the horizontal direction when viewed from the top, as shown in Fig. 8(a) and Figs. 7a to 7c described below. In this state, one bag is packed into the zigzag gap, and when the bag is inflated in this state, it is possible to fix the objects to be transported placed at any position in one go while positioning them with the inner wall of the container and the objects, or with each other, by the internal pressure of the bag during the bag inflation process.

[0017] In addition, the object to be transported is positioned and fixed in the same manner using another bag in the gap between the container and the object to be transported in the vertical direction inside the container. Specifically, the gap between the container and the object to be transported in a side view is formed so as to be continuously connected. For example, as shown in Fig. 8(b) and Fig. 7c described later, the gap inside the container is formed so as to be connected from the gap on the bottom side of the container across the gap on one side side to the gap above, and another bag (a bag different from the bag used in the horizontal direction) is filled in the continuous gap. In this state, the top surface of the container is closed, and then the container is inflated. As a result, the gap between the bottom wall and top wall of the container and the object is fixed by the internal pressure of the bag during the inflation process.

[0018] As described above, by using two or more bags, even if a plurality of objects are placed at any position in the container, it is possible to easily and simultaneously securely fix the objects in the horizontal and vertical directions.

[0019] Next, as a second invention, there is provided a packing bag with a check valve for use in the above-mentioned method for fastening and releasing an object to be transported. This packing bag with a check valve is composed of a bag body extending in the longitudinal direction that can be inflated with air and that becomes a sheet when deflated, and a tubular member that has a check valve provided therein and is connected to an edge portion of one longitudinal end side of the bag body, so that it is folded into a sheet having a substantially same plane when the bag body is deflated.

[0020] The packing bag with a check valve that is filled into the gap between the container and the object to be transported by the above-mentioned method for fixing and releasing the object to be transported extends in the longitudinal direction, and a tubular member with a check valve provided therein is connected to the edge of the bag body, so that when a nozzle is inserted, the check valve can be opened while guiding the nozzle to the inside of the bag body. With this configuration, the packing bag extends in the longitudinal direction so that it easily extends into the gap when the object to be transported is placed in the container, and air can be supplied to inflate the bag to a state where the object to be transported can be firmly fixed (positioned). In addition, when the bag body is degassed and folded at the destination, the tubular component with the check valve can be made into a single continuous sheet, making it highly storable and conducive to reuse.

[0021] Furthermore, it is preferable that the bag body has a long side bag portion that extends in the long direction during the inflation process, and / or a wide side bag portion that is connected to the long side bag portion and extends to the width side, and / or a plurality of protrusions that are connected to the long side bag portion and / or the width side bag portion and extend radially on the outer surface of the long side bag portion, and at least a portion of the outer surface of any of the long side bag portion, the wide side bag portion, and the protrusions abut against the object to be transported within the gap before the bag body is completely inflated.

[0022] When this packaging bag is configured, the bag body is arranged along the gaps between the main paths of multiple objects to be transported, and the bag portions on the width side are folded and arranged in other gaps; in the process of inflating the bag body, the bag portions on the length side inflate within the gaps between the main paths, generally fixing the multiple objects to be transported inside the container, while the bag portions on the width side enter and inflate into other gaps, so that the inflated bag body comes into contact with all of the objects to be transported and the inner walls of the container while being pressurized, thereby securely fixing and protecting the objects to be transported. Furthermore, because this bag body has multiple protrusions in the radial direction, even in cases where the shape of the gap varies slightly, the protrusions will come into contact with the objects to be transported first, which is also advantageous in that it can reliably fix and protect the objects to be transported, and the objects to be transported can be easily and reliably fixed at the source of transport regardless of the size and number of the objects to be transported, or the size and shape of the container.

[0023] The third aspect of the present invention is a packing mat in which two packing bags with check valves (a first packing bag and a second packing bag) are integrally joined together on substantially the same plane, Each of the bag bodies (the first bag body and the second bag body) has a main bag portion extending in a longitudinal direction, and a plurality of side flow bag portions extending perpendicularly from the main bag portion at a predetermined pitch in the longitudinal direction and each of which is fluidly connected to the main bag portion, The bag bodies are configured so that each sidestream bag section is offset from the other by a predetermined pitch in the longitudinal direction and fits together on approximately the same plane, and the edges along the orthogonal direction of adjacent sidestream bag sections are heat-welded to each other, and the orthogonal tip of one sidestream bag section is heat-welded to the other main stream bag section, thereby making it possible to inflate and deflate the sidestream bag sections by introducing air from each main stream bag section through each of the tubular members.

[0024] In this packing mat, the above-mentioned packing bag with a check valve is shaped as shown in Fig. 9, with a main flow bag portion extending in the longitudinal direction and a side flow bag portion connected thereto and formed in a comb shape, and two packing bags with check valves of this shape are placed opposite each other and joined by heat welding the edges. In this packing mat, the two packing bags with check valves can be inflated separately and independently, and while extending in the longitudinal direction during the inflation process, they form an air mat shape with approximately cylindrical members arranged side by side in the perpendicular direction.

[0025] By adopting such a configuration, even if one of the bag bodies breaks, the other bag body can be inflated to fix the transported object, which makes it highly durable and actively promotes reuse. Also, in the case of this packaging mat, the side-flow bag parts of the two bag bodies inflate in parallel, so unlike when there is only one bag body, the bag body does not inflate as a whole and contact only some of the transported objects to apply internal pressure, but instead forms parallel cylindrical sections at a predetermined pitch and becomes inflated and wavy, so that it contacts various parts of the multiple transported objects to apply internal pressure.

[0026] Furthermore, since the two bag bodies can be inflated and deflated separately, the amount of expansion and internal pressure can be adjusted according to the gap. As a result, it can be used to securely fix objects of various shapes and numbers.

[0027] In addition, in a suitable packing bag or packing mat with a check valve, a remaining number display section capable of indicating the remaining number of times the bag can be repeatedly used is provided on the outer surface of the bag body.

[0028] The packing bag or packing mat with a check valve that is filled into the gap between the container and the object to be transported by the above-mentioned method for fixing and releasing the object to be transported extends in the longitudinal direction, and a tubular member with a check valve provided therein is connected to the edge of the bag body, so that when a nozzle is inserted, the check valve can be opened while guiding the nozzle to the inside of the bag body. With this configuration, the packing bag extends in the longitudinal direction so that it easily extends into the gap when the object to be transported is placed in the container, and air can be supplied to inflate it to a state where the object to be transported can be firmly fixed (positioned).

[0029] In addition, when the bag body is deaerated and folded at the destination, the tubular member with the check valve can be made into a single continuous sheet, which makes it highly storable and contributes to reuse. Furthermore, since the outer surface of the bag body is provided with a remaining number display section that can clearly show the remaining number of times it can be repeatedly used, users can reuse it with peace of mind up to the remaining number of uses set as the durability limit, making it possible to provide something that can contribute to the social demand of reducing environmental impact.

[0030] As a fourth aspect of the present invention, there is provided an air gun for both supplying and degassing a packing bag having an air supply means for supplying gas in a pressurizable manner while adjusting the internal pressure in the above-mentioned method for fastening and unfastening an object to be transported. The air supply means includes: A pressure regulating valve is provided to adjust the internal pressure of the gas to be supplied, and the pressure regulating valve is a plunger having an elastic body that resists the internal pressure of the gas to be supplied; a cylinder within which the plunger slides axially; An opening extending a predetermined distance in an axial direction or a plurality of openings spaced apart at predetermined intervals on an outer periphery of the cylinder, the opening communicating the inside and outside of the cylinder; The cylinder further includes an annular member that is disposed around the outer periphery of the cylinder so as to be rotatable about a predetermined angle, and has through holes that are spaced apart in the axial direction and offset in the rotational direction at predetermined intervals.

[0031] The air gun for inflating and degassing packaging bags is equipped with a pressure adjustment valve for adjusting the internal pressure in the bag when inflating the packaging bag. This pressure valve is configured so that a plunger slides in a cylinder against the internal pressure of a supply gas such as compressed air with an elastic body such as a spring, and the supply gas is discharged to the outside (so-called degassing) according to the sliding position of the plunger, making it possible to adjust the internal pressure to a desired level. More specifically, the cylinder is provided with an opening extending in the axial direction (the sliding direction of the plunger) and multiple openings spaced apart in the same direction, and the annular member arranged on the outer periphery of the cylinder is provided with through holes at multiple positions shifted in the axial direction and rotation direction. With this configuration, when a user rotates the annular member to set a desired through hole to match the opening of the cylinder, the gas is degassed when the sliding position of the plunger passes the opening position of the cylinder, and the internal pressure that resists the elastic force of the spring or the like can no longer be applied, and the pressure of the supply gas can be adjusted to a desired level or lower.

[0032] The air supply means is an introduction flow path for introducing and sending out compressed air; a flow dividing means for switching the compressed air sent out from the introduction flow path to an air supply direction or a deaeration direction and sending it out; a main flow path that guides the compressed air sent out from the flow dividing means to an air inlet or a deaeration port at the tip, the flow dividing means is a hollow tubular member having an annular cross section that is inserted and disposed within the main flow passage, and has a plurality of supply flow dividing passages that are bored in the longitudinal direction at predetermined intervals around the axis of the annular cross section and that send the compressed air sent out from the introduction flow passage along the longitudinal direction into the main flow passage, and the air flows in the same direction along the axis of the annular cross section are merged by being drawn in by negative pressure due to the flow of compressed air sent out from the supply flow dividing passages into the mainstream flow passage, The device may further include a switching mechanism for switching the direction of the supply branch flow passage between the air supply direction and the air degassing direction when the compressed air is switched between the air supply direction and the air degassing direction and then sent out.

[0033] This air supply and degassing gun has a function of introducing compressed air from the outside and switching between supplying and degassing the packing bag. Specifically, the compressed air introduced from the introduction flow path can be switched by a flow dividing means between a compressed air flow in the forward direction (the supply and degassing port side of the main flow path) that pressurizes the bag while sending air into it, and a compressed air flow in the reverse direction (the opposite side of the main flow path) that depressurizes the bag while discharging air. This flow dividing means has a solid cylindrical shape in an annular cross section, and sends the compressed air flow from the introduction flow path into the main flow path from a plurality of supply flow dividing paths drilled at predetermined angular intervals in the annular cross section, and creates an air flow that flows in the direction of the central axis of the annular member by the negative pressure, and the two air flows are merged. The supply flow dividing paths can be switched between the air supply direction and the degassing direction by a switching mechanism.

[0034] By adopting such a configuration, when supplying air to the packing bag, compressed air is caused to flow in the forward direction toward the inner wall side of the main flow path through the supply branch flow path, while the negative pressure is applied to the hollow portion of the branch means to create a pressurized supply air flow. On the other hand, by switching the switching mechanism of the branch means, compressed air is caused to flow in the reverse direction toward the inner wall side of the main flow path through the deaeration branch flow path, while the negative pressure is applied to the hollow portion of the branch means to create a reduced pressure deaeration flow.

[0035] This air gun is designed to be connected to an existing compressor in a factory, and by simply placing one or more objects to be transported in a desired position at the source of transport, inserting this packaging bag into the gap and using existing compressed air, the objects to be transported can be quickly and properly packed and fixed while supplying and degassing the packaging bag, and the objects can be easily removed at the destination of transport, which is advantageous in that it makes it possible to significantly reduce transportation costs.In addition, this air gun can be switched between supplying and degassing with one air gun by simply using existing compressed air, making it possible to reduce the number of tools required when packaging at the source of transport and when removing objects at the destination of transport. [Brief description of the drawings]

[0036] [Figure 1] 1 is a plan view showing the structure of a packaging bag with a check valve of the present invention with a nozzle inserted therein. FIG. [Diagram 2] 1(a) shows an example of a material used for the packaging bag with a check valve of the present invention, and FIG. 1(b) shows another example of the material. [Diagram 3] 1(a) is a photograph showing the state before a nozzle is inserted into a packing bag with a check valve to inflate the bag body, and 1(b) is a photograph showing the state after the bag body of the packing bag with a check valve of the present invention has been inflated and the check valve has been closed. [Figure 4] A photograph showing an example of an air blow / vacuum gun having a nozzle for supplying air or degassing the packing bag with the check valve of Figures 1 and 2 and a pressurizing / depressurizing adjustment function is shown. [Diagram 5] (a) is a photograph showing a conventional example in which an object to be transported is wrapped in general-purpose bubble cushioning material and placed inside a container, and (b) is a photograph showing a conventional example in which multiple objects to be transported are each wrapped in general-purpose bubble cushioning material and placed inside a container. [Figure 6] (a) is a photographic example of an example of the state before the object to be transported is placed inside the container and the packaging bag is stuffed into the gap between the container and the object to be transported and inflated, and (b) is a photographic example of the state after the packaging bag has been inflated from (a). [Figure 7a] The figure shows an example of a photograph of the state after multiple objects to be transported have been placed in a container and two book packaging bags (book packaging mats) have been stuffed into the gaps between the container and each of the objects to be transported and before they are inflated. [Figure 7b] An example photograph of the state in which two book packing bags (book packing mats) are inflated from the state shown in Figure 7a and placed in the gap above is shown. [Figure 7c] 7B shows a photograph of an example of a state in which a book packing bag (book packing mat) to be placed in the gap above the state of FIG. 7B is closed to fill the gap above. [Figure 8] A schematic diagram illustrating the fixing method in FIG. 7(b) using a packing mat is shown. [Figure 9]The figure shows a packing 130 in which packing bags are assembled together, with (a) being a schematic plan view thereof and (b) being a schematic cross-sectional view taken along line AA in (b). [Figure 10] 1 shows a schematic diagram of an air supply and degassing air gun. [Figure 11] (a) is a schematic diagram showing how compressed air is injected (supplied) into a packaging bag or the like using an air supply / deaeration combination air gun, (b) is a schematic diagram showing how air is sucked (deaeration) from inside a packaging bag or the like using an air supply / deaeration combination air gun, and (c) is a schematic diagram showing the air flow through a switching nozzle provided on the air supply / deaeration combination air gun. [Figure 12] A schematic diagram of a pressure regulating valve is shown. [Figure 13] 2 is a schematic plan view of a modified example of the bag body of the packaging bag of FIG. 1. FIG. Best Mode for Carrying Out the Invention

[0037] First, an embodiment of a packing bag used in the method for fixing and releasing an object to be transported according to the present invention will be illustrated, in which the bag body is formed as a single piece. FIG. 1 is a plan view showing the structure of the packing bag with a check valve according to the present invention with a nozzle inserted therein. FIG. 2(a) shows an example of a material used in the packing bag with a check valve according to the present invention, and FIG. 2(b) shows another example of the material. FIG. 3(a) shows a photograph of the packing bag with a check valve before a nozzle is inserted into the packing bag with a check valve to inflate the bag body, and FIG. 3(b) shows a photograph of the packing bag with a check valve according to the present invention after the bag body is inflated and the check valve is closed. FIG. 4 shows a photograph of an example of an air blow / vacuum gun having a nozzle for supplying or degassing air to or from the packing bag with a check valve shown in FIG. 1-FIG. 2 and a pressurizing and depressurizing adjustment function.

[0038] <<Examples of the structure of a single packing bag>> The packing bag 31 with a check valve is configured like an air bag that extends in the longitudinal direction (the vertical direction in FIG. 1) as shown in FIG. 1 and inflates when air is poured inside, and is composed of a hollow bag body 33, a tubular member 35 for supplying and deaerating air provided at the edge of one longitudinal end (upper end) of the bag body 33, and a check valve 37 provided inside the tubular member 35 at a position on the inner side of the bag body 33. When the air in the bag body 33 is evacuated and the packing bag 31 with a check valve is in a shrunk state, it can be folded into a sheet on the same plane as the tubular member 35 as shown in FIG. 1.

[0039] The tubular member 35 is composed of a protruding portion 39 for inserting a hollow nozzle 41 from the outside, and a check valve 37 provided inside the bag body 33 in communication with the protruding portion 39, and has a function of communicating and closing the outside and the inside of the bag body 33 by the check valve 37. The protruding portion 39 is formed by overlapping a long tongue piece 39a and a short tongue piece 39b in a folded sheet-like state and heat-welding both sides, and in the example shown in Figures 2(a) and (b), the long tongue piece 39a is colored green and the short tongue piece 39b is colored yellow. By using the long tongue piece 39a and the short tongue piece 39b, it becomes easier to identify the position of the tubular member 39 that serves as the insertion port when injecting air, and it becomes easier to guide the tip of the nozzle 41 into the bag body 33. This makes it easier to insert the nozzle 41 into the tubular member 39.

[0040] The check valve 37 is constructed by overlapping two sealing materials 43, 45 and joining the heat-sealed parts 47, 49 on both the left and right sides by heat welding, and is generally flat. Heat-sealed parts 51, 53 are provided inside the heat-sealed parts 47, 49, and the lower end of the check valve 37 (the lower end in Fig. 1) is an outlet 55 into the bag body 33, and the upper end of the check valve 37 (the upper end in Fig. 1) is an inlet 57 from the protruding part 39. Inside the check valve 37, a flow path 59 for intake and deaeration is formed in the center connecting the inlet 57 and the outlet 55. Along this flow path 59, a first-stage valve flap part 61 in which a pair of heat-sealed parts 65, 65 inclined downward on both the left and right sides are arranged opposite to each other, and a second-stage valve flap part 63 in which a pair of heat-sealed parts 67, 67 inclined downward on both the left and right sides are arranged opposite to each other are provided.

[0041] With the check valve 37 having such a configuration, as shown in Fig. 2(a), the nozzle 41 is inserted from the protruding portion 39 of the tubular member 35 to the check valve 37, and the first stage valve flap portion 61 and the second stage valve flap portion 63 are pushed in until their tips (distal ends) reach the inside of the bag body 33. In this state, air is injected into the nozzle 41 with an air gun 71 (see the air supply and degassing air gun 71 described later) connected to the proximal end side of the nozzle 41 to inflate the bag body 33. Thereafter, when the nozzle 41 is removed as shown in Fig. 2(b), the first stage valve flap portion 61 and the second stage valve flap portion 63 come into contact with each other in the process of the pairs of heat seal portions 65 and 65, 67 and 67 rising, thereby closing the flow path 59, and preventing the air in the bag body 33 from leaking out to the outside.

[0042] The configuration of the check valve 37 is not limited to that shown in the figure, and various configurations are possible with respect to the number of valve flaps, the number and shape of the heat sealed portions that make up each valve flap.

[0043] <Examples of packaging bag materials> Next, examples of materials used for the bag body 33 and the tubular member 35 will be described. Fig. 2 shows a schematic diagram of a representative example of the resin material used for the bag body 33 and the tubular member 35 of the present packaging bag 31. Fig. 2(a) shows as an example a two-layered material in which a nylon film and a polyethylene film are bonded together, and Fig. 2(b) shows as another example a five-layered material in which a nylon film, an adhesive polyethylene film, and a polyethylene film are bonded together.

[0044] First, in the two-layered material of Fig. 2(a), (i) a nylon film is attached to the outer surface and (ii) a polyethylene film is attached to the inner surface with an adhesive as shown in (iii) to form a sheet. (i) Nylon film has excellent tensile strength and puncture resistance, and is suitable as the outer surface material for the packaging bag 31, which is intended to be repeatedly reused at the shipping source and destination. Nylon film is also advantageous in that it has low oxygen permeability and can prevent oxidation of the contents when used as a packaging bag. On the other hand, (i) nylon film cannot be manufactured into a bag shape using only nylon resin, since nylon resin alone cannot be heat-sealed due to its high heat resistance.

[0045] For this reason, the example of the material used for the present packaging bag 31 shown in FIG. 2(a) is a laminate film formed by bonding (ii) polyethylene film to (i) nylon film with adhesive (see (iii)). (ii) polyethylene film has a better moisture-proofing ability than (i) nylon film, and has a low melting point (80-100°C), so it is suitable for heat-sealing and is suitable for combination with (i) nylon, which is difficult to heat-seal, in that it can achieve high sealing strength. Therefore, by forming the present packaging bag 31 into a two-layer structure in which (i) nylon film and (ii) polyethylene film are bonded with adhesive as shown in (iii), a material is formed that combines the advantages of both (i) and (ii) required for the present packaging bag 31, namely, tensile strength, puncture resistance, and heat sealability.

[0046] Next, in the five-layered material of FIG. 2(b), a five-layered structure is formed by bonding a nylon film, an adhesive polyethylene film, and a polyethylene film. As mentioned above, the nylon film (i) has excellent tensile strength and puncture resistance, and the polyethylene film (ii) has excellent heat sealability. However, the nylon film (i) also has a high transparency. In another example of FIG. 2(b), a laminated film is formed by doubling the nylon film (i) in order to increase the strength of the laminated film of the layered structure combined with the polyethylene film (ii). Specifically, from the outermost surface (top surface) to the innermost surface (bottom surface), the nylon film (i), the adhesive polyethylene film (iii), the nylon film (i), the adhesive polyethylene film (iii), and the polyethylene film (ii) are bonded to each other to form a sheet. With such a layered structure, the strength and oxidation prevention ability of the entire film can be improved while maintaining the advantage of not impairing the transparency that is a characteristic of the nylon film (i).

[0047] Other examples of packaging bag structures (packaging mats) 9 shows a packing mat 130 in which the above-mentioned packing bags 31 are combined together, with (a) being a schematic plan view and (b) being a schematic cross-sectional view taken along line AA in (b). The packing mat 130 extends in the longitudinal direction (left-right direction in FIG. 9(a)) by heat-welding a first packing bag 131a and a second packing bag 131b, each of which extends in the lateral direction (up and down in FIG. 9(a)). Air is supplied to or degassed from a first bag body 136a and a second bag body 135 separately via a first tubular member 135a and a second tubular member 135b provided for each of the first packing bag 131a and the second packing bag 131b. More specifically, the first bag body 136a and the second bag body 135 each have a plurality of side flow bag portions 133a2-133a5 and 133b2-133b6 that communicate with main flow portions 133a1 and 133b2 extending in the horizontal direction (vertical direction in Figure 9(a)) and branch off in parallel at a predetermined pitch in the width direction (vertical direction in Figure 9(a)).

[0048] The two first packing bags 131a and second packing bags 131b having such a structure are combined so that the side stream bag portions 133a2-133a5 and 133b2-133b6 face each other in the width direction and their concave and convex portions fit together, and the edges of the side stream bag portions 133a2-133a5 and side stream bag portions 133b2-133b6 adjacent in the longitudinal direction are heat-welded to each other, and further the edges of the widthwise tips of the side stream bag portions 133a2-133a5 and side stream bag portions 133b2-133b6 are heat-welded to the edges of the widthwise base of the main portion 133b2 and main portion 133a1, respectively, to form an integrated packing mat 130.

[0049] Fig. 9(b) shows the side flow bag parts 133a2, 133b2, 133a2 in Fig. 9(a) in a state where air is supplied to them in a heat-sealed state, and they are inflated. From this figure, it can be seen that the side flow bag parts 133a2, 133b2, 133a2 have an approximately wavy shape with the edge parts 132 heat-sealed, and the space (circle 1) and the space (circle 3) are internal spaces of the first bag body 133a that communicate with each other, and form spaces independent of the space (circle 2) that is the internal space of the first bag body 133b. Therefore, even if one of the first bag body 136a or the second bag body 135 is torn, the packing mat 130 can fix the transport object 90 by inflating the other, and is excellent in durability and reusability. In addition, in the case of this packaging mat 130, the sidestream bag portions 133a2 to 133a5 of the two first bag bodies 136a and the sidestream bag portions 133b2 to 133b6 of the second bag body 135 do not expand as a whole as in the case of a single bag body, causing the bag body to abut only against some of the transport objects 90 and apply internal pressure, but rather form parallel cylindrical compartments at a predetermined pitch and become swollen and wavy, causing the bag body to abut against various locations of the multiple transport objects 90 and apply internal pressure, and furthermore, since air can be supplied and evacuated separately for each first bag body 136a or second bag body 135, the amount of expansion and internal pressure can be adjusted according to the gap.

[0050] <<How to secure and release items using packing bags (at the source and destination)>> Next, a method for fastening and releasing an object to be transported using the packaging bag 31 shown in FIG. 1 will be described. First, as a method for fixing an object to be transported, FIG. 5(a) is a photograph showing a conventional example in which the object to be transported 90 is wrapped in general-purpose bubble cushioning material (such as the registered trademark "Bubble Wrap") 32 at the source of transport and then placed inside a cardboard container 20; FIG. 6(a) is a photographic example of an example of the state before the object to be transported is placed inside the container and a real packaging bag is stuffed into the gap between the container and the top of the object to be transported and inflated; and FIG. 6(b) is a photographic example of the state after the real packaging bag has been inflated from (a).

[0051] 5(a), in the case of the conventional fixing method using bubble cushioning material 32, the object 90 to be transported is wrapped in bubble cushioning material 32 beforehand or placed in a bag of bubble cushioning material 32, and then the object 90 is placed in the container 20 with the vertically opening door 20a and the horizontally opening door 20b opened. In this case, if the object 90 to be transported does not correspond to the size of the container 20, the gap 91 between the container 20 and the object 90 to be transported also becomes large, and if the vertically opening door 20a and the horizontally opening door 20b are closed and the object 90 to be transported is packed in this state, the fixation is poor and the object 90 to be transported will shift or vibrate inside the container 20 during transportation.

[0052] In contrast, when using the packing bag 31, first, as shown in Fig. 6(a), the inside is empty and the vertical opening door 20a and the horizontal opening door 20b are open, and the object 90 to be transported is placed in the packing bag 31 before being inflated. After that, the uninflated packing bag 31 is placed in the gap 91 between the container 20 and the object 90 to be transported, and air is supplied to the inside of the bag body 33 as described above in Fig. 3(b) to inflate it as shown in Fig. 6(b). In this state, the vertical opening door 20a and the horizontal opening door 20b are closed. In this way, the inflated packing bag 31 is placed in the gap 91 above the object 90 to be transported without any gaps, and the elastic force of the air in the packing bag 31 firmly presses and fixes the object 90 to be transported in the vertical direction in the container 20.

[0053] Furthermore, in order to securely fix the object 90 to be transported in the container 20 while simultaneously packing it without strain, it is necessary to properly adjust the amount of expansion of the packing bag 31. To achieve this, before inflating the packing bag 31 on the object 90 to be transported, one or both of the vertically opening door 20a and the horizontally opening door 20b are closed, and then when a nozzle 41 is inserted into the tubular member 35 of the packing bag 31 to blow air into the bag body 33, the internal pressure of the bag body 33 is pressurized so as not to exceed a predetermined value. For example, an air gun 71 described later is used for this pressurization.

[0054] Next, the second method of fixing the object 90 to be transported is to pack a plurality of objects 90 to be transported in a container 20 such as a cardboard box at the transport source. FIG. 5(b) is a photograph showing a conventional example in which a plurality of objects 90 to be transported are wrapped in general-purpose bubble cushioning material 32 and then placed in the container 20. FIG. 7(a) shows a conventional example in which a plurality of objects 90 to be transported are placed in the container 20 and then two packing bags 31 (packing mats 31) are inserted into the gaps 91 between the container 20 and each object 90 to be transported (90a to 90b described later). FIG. 7b is a photograph of an example of the state before two packing bags 31 (packing mats 130, 230) are filled and inflated from the state of FIG. 7a, and the packing bag 31 (packing mats 130, 230) to be placed in the upper gap 91 is opened. FIG. 7c is a photograph of an example of the state after the packing bag 31 (packing mats 130, 230) to be placed in the upper gap 91 from the state of FIG. 7b is closed to fill the upper gap 91.

[0055] As shown in Figure 5(b), in the past, when multiple objects to be transported 90 were fixed inside a container 20 using bubble cushioning material 32, the objects to be transported 90 were wrapped in bubble cushioning material 32 in advance and then placed inside the container 20 with the vertical-opening door 20a and the horizontal-opening door 20b open. However, the gap 91 inside the container changes depending on the size and number of objects to be transported 90 to be placed inside the container 20, and simply placing the objects to be transported 90 wrapped in bubble cushioning material 32 inside the container and closing the vertical-opening door 20a and the horizontal-opening door 20b to pack the objects results in poor fixation, as in the example shown in Figure 5(a).

[0056] In contrast, in a method for fixing a plurality of objects 90 to be transported using two permanent packing bags 31 (permanent packing mats 130, 230) as shown in the photographs of Figures 7a to 7c, a plurality of objects 90 to be transported are placed as is in a container 20 as shown in Figures 7a to 7c, and air is supplied from a nozzle 41 to the gaps 91 between the inner wall of the container 20 and each of the objects 90 to be transported while the uninflated permanent packing bags 31 (packing mats 130, 230) are packed in a zigzag and U-shape. A more detailed explanation will be given below with reference to the schematic diagram shown in Figure 8.

[0057] Fig. 8 shows a schematic diagram of the case where a packing mat 130 (see Fig. 9) is used to explain the concept of the fixing method of Fig. 7a to Fig. 7c. Fig. 8(a) shows a schematic plan view of the packing mats 130, 230 packed in a zigzag (see mainly the packing mat 130 in Fig. 7a to Fig. 7b) and a U-shape (see mainly the packing mat 230 in Fig. 7c) in the gaps 91 between the container 20 and each of the objects 90 to be transported when five objects 90a to 90e are placed in the container 20. Fig. 8(b) shows a schematic side view of the packing mats 130, 230 packed in the gaps 91 when three objects 90f to 90h are placed in the container 20 (see mainly the packing mat 230 in Fig. 7c).

[0058] First, the fixation of the transport object 90 in the horizontal direction (planar direction) will be described with reference to Fig. 8(a). As shown in Fig. 8(a), when five transport objects 90a to 90e are placed in the container 20 in a plan view, gaps 91 between the container 20 and the transport objects 90a, 90e are provided between the left and right inner walls of the container 20 and the transport objects 90a, 90e, and between each of the transport objects 90a to 90e. Furthermore, gaps 91 are also provided between the upper and lower inner walls of the container 20 and the upper and lower ends of each of the transport objects 90a to 90e. In this state, a zigzag continuous path of the gaps 91 can be found, and the packing mat 130 is packed into the path of such gaps 91, and then, as in Fig. 7(b), a nozzle 41 is inserted into the first tubular member 135a for air supply to supply air and inflate the packing mat 130 in the gap path.

[0059] When the packing mat 130 is inflated in this way, the packing mat 130 is inserted into all gaps 91 in the horizontal direction of the paper, and the objects 90a to 90e are firmly fixed in the horizontal direction of the paper because they come into contact with at least a part of the left and right edges of the paper. The packing mat 130 also enters the gaps 91 between the upper ends of the objects 90a, 90c, and 90e and the upper inner wall of the container 20, and the gaps 91 between the lower ends of the objects 90b and 90d and the lower inner wall of the container 20, and when inflated, the mat comes into contact with at least a part of the upper and lower ends of the objects 90a to 90e, and they are firmly fixed in the vertical direction. Therefore, the objects 90a to 90e can be firmly fixed in the horizontal direction in the container 20 simply by inflating the packing mat 130.

[0060] Next, the vertical fixation of the transport object 90 will be described with reference to FIG. 8(b) and another packing mat 230. As shown in FIG. 8(b), when three transport objects 90a-90c are placed in the container 20, gaps 91 are provided between the container 20 and the transport objects 90a-90c above and below the paper in side view. In this state, a U-shaped continuous path of the gap 91 can be found that runs from the top of the paper across the sides to the bottom of the paper. The packing mat 230 is packed into the path of such gap 91, and then a nozzle 41 is inserted into the first tubular member 235a for air supply to supply air and inflate the packing mat 230 in the gap path.

[0061] When the packing mat 230 is inflated, the packing mat 230 enters the gaps 91 on both the top and bottom sides of the paper in Fig. 8(b) and comes into contact with the top and bottom ends of the objects 90a to 90c on the paper, so that they are firmly fixed in the up-down direction (vertical direction) of the paper. Therefore, the objects 90a to 90c can be firmly fixed in the vertical direction inside the container 20 simply by inflating the packing mat 230.

[0062] As described above, by preparing two or more of the packing bags 31 or packing mats 130 (230) and arranging them in the zigzag and U-shaped gaps 91 as shown in Figures 7(b) and 8 before inflating them, it is possible to position and instantly fix an object to be transported in any position using the internal pressure of the packing bags 31 or packing mats 130 (230) during the inflation process.

[0063] Other examples of packaging bag structures (deformed bags) Fig. 13 shows a schematic plan view of a modified example of the above-mentioned packaging bag 31. The bag body 33 in this packaging bag 31 has the long side bag portion 31a extending in the longitudinal direction as described above, and communicates with the long side bag portion 31a midway and extends to both sides in the width direction (the vertical direction in Fig. 13). Therefore, when the long side bag portion 31a extends in the longitudinal direction during the inflating process and reaches the both side bag portions 31b, the air inside is diverted, and the long side bag portion 31a and both side bag portions 31b inflate and extend. When the bag body 31 is configured in this manner, the bag body 33 is arranged and inflated not only in the gaps 91 between the object to be transported 90 and the container 20 in which the long side bag portion 31a is arranged, but also in the gaps 91 in the path in which the two side bag portions 31b are arranged, so that even a small number of packaging bags 31 can enter various gaps 91 and abut and fix each object to be transported 90.

[0064] 13 has a plurality of radially protruding protrusions 31c arranged over the entire outer surface, and during the inflating process, the protrusions 31c expand radially more than the other outer surfaces and come into contact with the object 90 or the inner wall of the container 20 in the gap 91 before the other outer surfaces. These protrusions 31c can come into contact with any part of the object 90 in response to small widths and changes in path of various gaps 91. Furthermore, even if the bag body 33 is inflated with the same pressure, the contact force varies between the protrusions 31c and the other outer surfaces, so each object 90 can be firmly fixed in the container 20 while making an adjustment suitable for the gap 91.

[0065] <About the air supply and degassing air gun> Next, an air supply and degassing air gun (hereinafter also simply referred to as "air gun") 71 for the packing bag 31 and the packing mat 130 (hereinafter also simply referred to as "packing bag 31, etc.") will be illustrated. Fig. 10 is a schematic diagram of the air supply and degassing air gun 71 having a function of supplying compressed air into the packing bag 31, etc. to inflate it, and a function of degassing the air in the packing bag 31, etc. to shrink it. Fig. 11 shows a schematic diagram of the compressed air being sprayed (supplied) into the packing bag 31, etc. by the air gun 71 in (a), a schematic diagram of the air being sucked (degassed) from the packing bag 31, etc. by the air gun 71 in (b), and a schematic diagram of the air flow by the switching nozzle 72 provided on the air gun 71 in (c). Fig. 12 also shows a schematic diagram of the pressure adjustment valve 300 provided on the air gun 71.

[0066] The air gun 71 is connected to a compressor or the like in a factory via a supply port 77 provided below a handle 73 held by a user, and compressed air is sent to a gun member 80 that communicates with the upper handle 73 via an inlet flow path of the handle 73 (see dotted lines in Figs. 11(a) and (b)). The gun member 80 is a hollow tubular member with an annular cross section that forms a main flow path for compressed air, and a hollow switching nozzle 72 is inserted and disposed along its internal axis. When a stopper 78 is opened, the compressed air sent from the inlet flow path of the handle 73 is diverted into a plurality of flow paths (see the flow path of primary air (circle 1) in Figs. 11(a) and (b) and Fig. 11(c)) that are drilled in the longitudinal direction (axial direction) at a predetermined pitch around the circumference within the peripheral wall of the annular cross section of the switching nozzle 72. For example, during air supply, the compressed air is guided as primary air inside the gun member 80 toward the nozzle aperture 74 (forward direction) and sprayed from the tip. 11(c), the compressed air as primary air (circle 1) branched into multiple flow paths in the switching nozzle 72 flows along the inner peripheral wall of the gun member 80, and an air flow pulled by the negative pressure generated by the flow of this primary air (circle 1) is generated as secondary air (circle 2) along the axis of the gun member 80. In this way, the air flow formed by the primary air (circle 1) and the secondary air (circle 2) generated by the primary air (circle 1) passes through the nozzle 41 and becomes air that inflates the inside of the packaging bag 31, etc. This is the air supply function of the air gun 71.

[0067] On the other hand, during deaeration, the direction of the switching nozzle 72 is reversed, and the compressed air sent from the handle 73 into the switching nozzle 72 as primary air (circle 1) is released into the gun member 80, guided to the hose attachment port 75 side (reverse direction), and sprayed from the hose attachment port 75. At this time, the compressed air as primary air (circle 1) diverted into multiple flow paths in the switching nozzle 72 whose direction has been reversed flows along the inner peripheral wall of the gun member 80 as in the case of the above-mentioned air supply, and generates a suction force on the nozzle aperture 74 side with an air flow formed by the secondary air (circle 2) generated by the negative pressure of the primary air (circle 1), and reduces the pressure inside the packaging bag 31 or the like via the nozzle 41 to shrink it. This is the deaeration function of the air gun 71.

[0068] In the above explanation, an example was given of the case where the direction of the switching nozzle 72 is reversed to reverse the primary air and degass (suction) from the supply air (jet). However, it is also possible to consider the case where a plurality of flow paths are drilled at a predetermined pitch around the peripheral wall of the annular cross section of the switching nozzle 72, which are formed of a flow path that penetrates toward the nozzle aperture 74 side (forward direction) and a flow path that is out of phase with the flow path and penetrates toward the hose mounting port 75 side (reverse direction), and the switching nozzle 72 is rotated around its axis to reverse the diversion direction of the compressed air sent out from the inlet flow path of the handle 73, thereby degassing (suction) from the supply air (jet). 10 to 11, the air supply and degassing combination air gun 71 is assumed to use compressed air from a compressor in a factory, and has been described on the premise of a source and destination for bulk transport, but it is also assumed that the air supply and degassing combination air gun 71 is a portable electric air gun for small-volume transport, such as between individuals where the source and destination do not have equipment such as a compressor. In such cases, a mechanism and battery for generating general-purpose compressed air will be installed separately.

[0069] <About pressure regulating valves> The air gun 71 described above is provided with a pressure regulating valve 300 (not shown) that communicates with the inside of the gun member 80 and pressurizes and depressurizes the compressed air inside. As illustrated in the schematic diagram of Fig. 12, the pressure regulating valve 300 is generally composed of a cylindrical cylinder 301, a plunger 302 that slides axially inside the cylinder 301 (see arrow A), and an annular member 303 that covers the outer periphery of the cylinder 301 and is rotatable about its axis. The cylinder 301 is a hollow member that closes the outside side and opens the inside side of the gun member 80. The plunger 302 is equipped with a disk member 302a having one surface (the surface facing the "inner side" on the page) facing the inside of the gun member 80 and the opposite surface facing the inside of the cylinder 301, and sliding axially inside the cylinder 301, and a spring member (elastic body) 302b disposed between the opposite surface (upper surface on the page) of the disk member 302a and the upper inside of the cylinder 301, and opposing the compressed air pressure inside the gun member 80.

[0070] When the pressure of the compressed air in the gun member 80 increases, the disk member 302b rises (as shown in the drawing) against the spring member 302, and the plunger 302 stops at a point where it balances with the elastic force of the spring member 302. Conversely, when the pressure of the compressed air in the gun member 80 decreases, the disk member 302b rises (as shown in the drawing) against the spring member 302, and the plunger 302 stops at a point where it balances with the elastic force of the spring member 302.

[0071] The annular member 303 is an annular member having a predetermined axial distance, and is disposed so as to cover the outer periphery of the cylinder 301 from the outer end (upper end of the drawing) as indicated by arrow B, and is rotatable about the axis. The annular member 303 has through holes 303a-303c spaced apart in the axial direction and shifted in sequence by a predetermined pitch in the axial rotation direction. Furthermore, the outer periphery of the cylinder 301 has an opening 301a (or a plurality of openings (not shown) spaced apart by a predetermined distance) that communicates between the inside and outside and extends in the axial direction.

[0072] In the pressure regulating valve 300 having such a configuration, for example, when the annular member 303 is rotated on its axis to set the lowest through hole 303c to match the position of the opening 301a of the cylinder 301, the pressure of the compressed air in the gun member 80 rises, and even if the disk member 302a of the plunger 302 rises, when the lower surface of the disk member 302a exceeds the through hole 303c, the opening 301a and the through hole 303c communicate with each other, so that the compressed air in the gun member 80 is released to the outside, and the pressure of the compressed air does not rise any further, so that the pressurization of the air in the packing bag 31, etc. to be supplied is limited. In addition, when the annular member 303 is further rotated on its axis counterclockwise to set the through hole 303b to match the position of the opening 301a, the elastic force of the spring member 302b resisting the disk member 302a is larger than when the through hole 303c is set to match, so that the pressurization limit of the packing bag 31, etc. by the compressed air can be increased. Furthermore, by further rotating the annular member 303 counterclockwise on its axis and setting the through hole 303a to match the position of the opening 301a, it is possible to set an even higher pressurization limit in the packing bag 31, etc. That is, by simply providing the opening 301a (which may be through holes arranged at a predetermined distance in the axial direction) extending in the cylinder 301 and providing a plurality of through holes 303a-303c at a predetermined distance and offset by a predetermined angle in the axially rotatable annular member 303, a pressure regulating valve capable of controlling the pressurization and depressurization of compressed air in a stepped manner can be configured.

[0073] In the above description, the pressure regulation of the compressed air by the pressure regulation valve 300 has been described as an example, but since the compressed air from a compressor or the like is a constant and strong jet flow, it may be necessary to regulate the pressure by a means other than the pressure regulation valve 300 or to use another means in combination with the pressure regulation valve 300 to limit the sudden expansion of the packaging bag 31 or the like. As such a means, a means for adjusting the amount of air in the compressed air flow in the introduction flow path of the air gun 71 may be considered as such a separate means. For example, a throttle valve (restriction valve) may be provided in the stopper 78 that opens and closes the delivery of compressed air from the introduction flow path (see dotted line in FIG. 11) of the handle 73 of the air gun 71, and the amount of air delivered from the introduction flow path may be changed by gradually opening and closing the throttle valve.

[0074] Various embodiments of the present invention have been described above, but the embodiments shown in this specification and the drawings are merely examples of the present invention, and it will be apparent to those skilled in the art that various other improvements and modifications exist based on the concept and teachings of the claims. [Explanation of symbols]

[0075] 20 Containers (packaging containers) 20a Side opening door 20b Vertical opening door 31 Packing Bags 32 Bubble wrap 33 Bag body 33a~33 35 Tubular members 35a~35 37 Check valve 39 Protrusion 39a long tongue piece 39b Short tongue piece 41 Nozzle 43,45 Seal material 47,49 Heat welded part 51, 53 Heat seal section 55 Exit 57 Entrance 59 Flow Path 61 First stage valve flap section 63 Second stage valve flap section 65, 67 Heat seal section 71 Air supply and degassing combination air gun (pressurization and decompression means) 72 Switching nozzle (flow dividing means) 73 Handle (inlet flow channel) 74 Nozzle diameter 75 Hose attachment diameter 76 Dust Bag 77 Supply Inlet 78 Stopper 80 Gun Parts 81 Packaging items 90 Transport object (object) 90a~90h Transport items 91 Gap 91a~91 Gap 130 Packing Mat 131a First packing bag 131b Secondary packaging bag 133a First bag body 133a1 Mainstream bag section 133a2~133a5 Side flow bag part 133b Second bag body 133b1 Mainstream bag section 133b2~133b6 Side flow bag part 135a first tubular member 135b second tubular member 235a First tubular member 235b second tubular member 300 Pressure Regulating Valve 301 Cylinder 301a aperture 302 Plunger 302a Disc member 302b Spring member (elastic body) 303 Annular members 303a~3003c Through hole

Claims

1. A method for fastening and releasing an object to be transported, which includes a container capable of containing the object to be transported, and a bag capable of being inflated with air and communicating with or closing the bag from outside air by a check valve, the method comprising the steps of: The object to be transported is composed of one or more objects of any shape and size, and the method for fixing and unfixing an object to be transported comprises placing each object at any position in a container at the source of transport, disposing the bag in the gap, fixing each object in the container by inflating the bag while a means for supplying gas in a pressurizable manner while adjusting the internal pressure is fluidly connected to the inside of the bag via the check valve, and releasing the fixation of each object in the container by removing the air from the bag.

2. The method for fixing and releasing objects to be transported according to claim 1, characterized in that when the air is removed from the bag to release each of the objects within the container, the distal end of the nozzle that reaches beyond the check valve of the bag is inserted to connect the bag to the outside, thereby creating an environment in which the internal pressure of the bag is reduced and the bag is degassed.

3. The method for fixing and releasing an object to be transported, as described in claim 2, characterized in that the means for supplying gas in a pressurizable manner while adjusting the internal pressure is a pressurizing and depressurizing means provided with a depressurizing means for degassing the gas by reducing the pressure, and the method for forcibly degassing the bag by inserting the nozzle and fluidly connecting the proximal end of the nozzle to the pressurizing and depressurizing means with the distal end of the nozzle reaching the tip of the check valve of the bag.

4. The bag has at least two or more bags, and when the objects are disposed in the gap in a state where the objects are placed in any positions in the container at the transportation source, forming a continuous path over the entire gap in a top view while the top surface side of the container is open, disposing at least one bag over the path, and then inflating the bag; The method for fixing and releasing an object to be transported according to any one of claims 1 to 3, characterized in that a continuous path is formed across the entire gap in a side view with the top side of the container open, and at least one other bag is arranged across the path, and then the other one bag is inflated with the top side of the container closed.

5. A packaging bag with a check valve used in the method for fixing and releasing an object to be transported according to any one of claims 1 to 4, comprising: a bag body extending in the longitudinal direction that can be inflated with air and that becomes sheet-like when deflated; and a tubular member having a check valve provided therein and connected to an edge portion of one longitudinal end side of the bag body, so that the bag body is folded into a sheet-like shape that is approximately flush with the surface when the bag body is deflated.

6. The packaging bag with a check valve as described in claim 5, characterized in that the bag body has a long side bag portion that extends in the longitudinal direction during the inflating process, and / or a wide side bag portion that is connected to the long side bag portion and extends to the width side, and / or a plurality of protrusions that are connected to the long side bag portion and / or the width side bag portion and extend radially on the outer surface of the long side bag portion, and at least a portion of the outer surface of any of the long side bag portion, the wide side bag portion, and the protrusions abut against the respective object to be transported within the gap before the bag body is completely inflated.

7. A packing mat in which two packing bags with check valves according to claim 5 are joined together on substantially the same plane, Each of the bag bodies has a main bag portion extending in a longitudinal direction, and a plurality of side flow bag portions extending perpendicularly from the main bag portion at a predetermined pitch in the longitudinal direction and each of which is fluidly connected to the main bag portion, The bag bodies are configured such that each sidestream bag portion is offset from the other sidestream bag portion by a predetermined pitch in the longitudinal direction and fits together on approximately the same plane, the edges along the orthogonal direction of adjacent sidestream bag portions are heat-welded to each other, and the orthogonal tip of one sidestream bag portion is heat-welded to the other main stream bag portion, thereby making it possible to inflate and deflate the sidestream bag portion by introducing air from each main stream bag portion through each of the tubular members.

8. A packaging bag with a check valve used in a method for fixing and releasing an object to be transported, as described in any one of claims 1 to 6, characterized in that a remaining number display section capable of indicating the remaining number of times the bag can be repeatedly used is provided on the outer surface of the bag body, or a packaging mat as described in claim 7.

9. The method for fastening and unfastening an object to be transported according to claim 2 or 3, further comprising an air gun for supplying and degassing a packing bag having an air supply means for supplying gas in a pressurizable manner while adjusting the internal pressure, the air supply means comprising: A pressure regulating valve is provided to adjust the internal pressure of the gas to be supplied, and the pressure regulating valve is a plunger having an elastic body that resists the internal pressure of the gas to be supplied; a cylinder within which the plunger slides axially; An opening extending a predetermined distance in an axial direction or a plurality of openings spaced apart at predetermined intervals on an outer periphery of the cylinder, the opening communicating the inside and outside of the cylinder; an annular member that is disposed around the outer periphery of the cylinder so as to be rotatable about a predetermined angle, and has through holes that are offset in the rotation direction at predetermined intervals in the axial direction; An air gun for both supplying and degassing packaging bags.

10. The air supply means is an introduction flow path for introducing and sending out compressed air; a flow dividing means for switching the compressed air sent out from the introduction flow path to an air supply direction or a deaeration direction and sending it out; a main flow path that guides the compressed air sent out from the flow dividing means to an air inlet or a deaeration port at the tip, the flow dividing means is a hollow tubular member having an annular cross section that is inserted and disposed within the main flow passage, and has a plurality of supply flow dividing passages that are bored in the longitudinal direction at predetermined intervals around the axis of the annular cross section and that send the compressed air sent out from the introduction flow passage along the longitudinal direction into the main flow passage, and the air flows in the same direction along the axis of the annular cross section are merged by being drawn in by negative pressure due to the flow of compressed air sent out from the supply flow dividing passages into the mainstream flow passage, A switching mechanism is provided for switching the supply branch flow passage to the air supply direction or the degassing direction when the compressed air is switched to the air supply direction or the degassing direction and sent out.

10. The air gun for supplying and degassing a packaging bag according to claim 9.

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