JP2010070221A - Box-shaped packaging material and method of manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a box-shaped packaging material which prevents the generation of paper dust, easily increases safety, surely guarantees quality, and can be used repeatedly, and also to provide a method of manufacturing the same. <P>SOLUTION: This box-shaped packaging material is made of a synthetic resin hollow sheet, is formed with an item storage space 25 inside, and has a packaging material body 2 with an opening 26 for opening the item storage space 25 outwardly at least on one of its faces, and a lid 4 which is made of the synthetic resin hollow sheet, and is mounted openable on the opening 26 of the packaging material body 2 through an engagement means 3. The engagement means 3 is provided with a synthetic resin first engagement member attached along the edge of the opening 26 of the packaging material body 2 and a synthetic resin second engagement member attached along the edge of the lid 4 and releasably engaged with the first engagement member. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a box-shaped packaging material suitably used as a substitute for a cardboard box, and a method for manufacturing the same.

  As a box-shaped packaging material used for packaging various articles, paper cardboard is well known (for example, see Patent Document 1).

However, paper corrugated cardboard easily generates paper dust, and is not suitable for packaging precision products and other products that do not like dust. In addition, since the use of waste paper is increasing recently and the recycling rate is very high, the harmful effects caused by mixing of chlorine bleach and other chemicals necessary for recycling cannot be ignored. For this reason, there are cases where problems arise in the packaging of foodstuffs and the like today, where food safety is required at a high level. And cardboard using a high percentage of used paper is difficult to assure quality, and the amount of carbon dioxide generated during production is often higher than that of synthetic resin sheets and the like that are being improved by thinning. .
JP 2006-232354 A

  The present invention adds the advantage that the problems of conventional box-shaped packaging materials that paper dust is likely to occur, it is difficult to improve safety, and quality assurance cannot be thoroughly implemented, can be reused repeatedly. However, it is going to be solved.

  The present invention employs the following configuration in order to achieve the above object.

  That is, the box-shaped packaging material according to the present invention is formed of a hollow sheet made of synthetic resin, and has an opening for opening the article storage space to the outside at least on one side while forming the article storage space inside. A packaging material main body, and a lid portion that is configured by a synthetic resin hollow sheet body and is attached to the opening of the packaging material body through an engagement means so as to be openable and closable. A synthetic resin-made first engaging member attached along the edge of the opening in the packaging material body, and attached along the edge of the lid portion so as to be detachably engaged with the first engaging member. And a second engaging member made of synthetic resin.

  If it is the box-shaped packaging material of such a structure, since the whole can be comprised with a synthetic resin, generation | occurrence | production of paper dust can be prevented. In addition, since a hollow sheet body made of synthetic resin can appropriately select the material of the sheet constituting the inside and outside, even if a recycled material is used, a new synthetic resin layer is positioned on the necessary surface. Can be made. Therefore, it is easy to improve safety and quality assurance can be performed. And since the lid part is detachably attached to the packaging material body through the engaging means, the stored item can be taken out without destroying the hollow sheet body and can be reused repeatedly. It becomes possible.

  As a preferred embodiment of the hollow sheet body, a cap sheet having a large number of bubble forming protrusions, a back sheet attached to the protrusion opening side of the cap sheet, and attached to the protrusion leading end side of the cap sheet. A three-layered bubble sheet composed of a liner sheet can be mentioned, but is not necessarily limited to this. For example, a bubble sheet having a two-layer structure without the liner sheet may be used.

  In the case of a box-shaped packaging material having many bent portions, it is desirable to use polypropylene having good hinge characteristics among polyolefins as the main material of the hollow sheet body.

  As a preferred aspect of the engaging member, the first engaging member is a female frame member having a continuous groove, and the second engaging member has a protrusion that can be detachably inserted into the groove. Mention may be made of male frame materials. The first and second engaging members may have a three-dimensional frame shape having a U shape, a B shape, or the like along the edge of the opening, or along the edge of the opening. It may be a straight line or the like provided intermittently.

  If at least one of the first and second engaging members has a three-dimensional frame shape, the engaging member also functions as a reinforcing frame member in the assembled state, and stack strength is improved. It becomes possible to improve without difficulty. On the other hand, if at least one of the first and second engaging members to be adhered to the packaging material body is linear and divided and arranged, the packaging material body is folded with the lid portion opened. It becomes easy. Even when the first and second engaging members are made into a three-dimensional frame shape, if the resin hinges are formed at the corners, etc., the packaging material body can be used when not in use, as in the case of the divided arrangement described above. Etc. can be folded.

  As a method for efficiently producing such a box-shaped packaging material with a high yield, a step of preparing a packaging material main body and a lid made of a hollow sheet body, and a first engagement member and a second engagement member A step of preparing a combined body obtained by engaging each other with each other, a step of attaching a second engaging member of the combined body along an edge of the lid, and holding the packaging body in a fixed shape And a step of covering the opening of the packaging material main body with the lid attached to the bonding body and attaching the first engaging member of the combined body to the packaging material main body. Can be mentioned.

  According to such a manufacturing method, the first engaging member and the second engaging member can be attached to the lid and the packaging material body in a state where the first engaging member and the second engaging member are engaged with each other. Therefore, compared with the case where the 1st engagement member and the 2nd engagement member are stuck on a lid part and a packing material main part separately, alignment of engagement members becomes reliable. Therefore, when the lid is attached to the opening of the packaging material body, the smooth engagement between the first engagement member and the second engagement member is hindered due to the displacement of the attachment positions of the first engagement member and the second engagement member. Can be effectively prevented.

  Depending on the form of the packaging material main body and the lid, the bonded body is first attached to the packaging material main body, and then the lid is sealed on the packaging material main body so that the combined body is covered with the lid. It is also possible to stick it to the department. That is, in this case, as a method for manufacturing the box-shaped packaging material, the step of preparing the packaging material main body and the lid made of the hollow sheet body, and the first engagement member and the second engagement member are mutually engaged. A step of preparing a combined body, a step of attaching a first engaging member of the combined body along an edge of the packaging body, and a packaging body body or the lid portion to which the coupling body is attached. And a step of attaching the lid portion to the packaging body main body and attaching a second engaging member of the combined body to the lid portion while holding at least one of them in a fixed shape. be able to.

  A suction pad is preferably used for holding the packaging body and the lid.

  In order to adhere the first and second engaging members to the packaging material body and the lid part, for example, it is desirable to use hot melt.

  As a comprehensive manufacturing method when considering all forms of box-shaped packaging materials, the process of preparing a packaging material body and a lid made of a hollow sheet body and a pair of engaging members can be attached and detached. A step of preparing a combined body to be engaged, a step of attaching one engaging member of the combined body to either the packaging material main body or the lid portion, and holding the other in a fixed shape And a step of covering the opening of the packaging material body in the state and attaching the other engaging member of the combined body to the other.

  Since the present invention is configured as described above, it is possible to prevent the occurrence of paper dust, and it is easy to enhance safety, and thorough quality assurance can be used. It is possible to provide a possible box-shaped packaging material and a manufacturing method thereof.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  As shown in FIGS. 1 and 2, the box-shaped packaging material 1 is configured by a hollow sheet body and forms an article storage space 25 therein, and the article storage space is disposed on a side surface facing the article storage space 25. The packaging material main body 2 having two openings 26 that open 25 to the outside, and the opening 26 of the packaging material main body 2 that is constituted by a hollow sheet body and can be opened and closed via the engagement means 3 The two lid parts 4 are provided.

  The packaging material body 2 includes a bottom wall 21, a right side wall 22 and a left side wall 23 rising from both side edges of the bottom wall 21, and a top wall 24 positioned between the top edges of the side walls 22 and 23. Become. The bottom wall 21, both side walls 22, 23 and the top wall 24 of the packaging material body 2 are each integrally formed of a hollow sheet body, and between the bottom wall 21 and both side walls 22, 23 and between the top wall 24 and both sides. The hollow sheet body is bent at a right angle by inserting a thermal ruled line 27 between the walls 22 and 23. In this embodiment, as shown in FIG. 3 and FIG. 4, as a hollow sheet body, a cap sheet 51 having a large number of bubble forming protrusions, and a back sheet attached to the protrusion open side of the cap sheet 51 A bubble sheet body 5 having a three-layer structure including 52 and a liner sheet 53 attached to the tip end side of the cap sheet 51 is used. The material of the bubble sheet 5 may be any of general-purpose synthetic resins, but preferable results are obtained when polypropylene (hereinafter abbreviated as “PP”) is used. In particular, when a super random PP having an ethylene content of 3 to 10% is used among PP, it exhibits excellent workability and high wear resistance, and is difficult to break even when the lid 4 is repeatedly opened and closed. In addition to PP, polyethylene, α-olefin copolymer, polybutadiene, or the like may be used as the synthetic resin.

  The engaging means 3 is attached along the edge of each lid part 4 and the female frame material 31 as a first engaging member attached along the edge of the opening 26 in the packaging material body 2. And a male frame member 32 as a second engaging member that is detachably engaged with the female frame member 31. As shown in FIG. 2, the female frame member 31 has a three-dimensional frame shape having a U-shape along the edge of the opening 26, and has a continuous groove 31 a. Further, as shown in FIGS. 3 and 4, the cross section is substantially U-shaped, and a U-shaped recess is used as the groove 31a. The groove 31 a is directed to the opening 26. As shown in FIG. 2, the male frame member 32 has a three-dimensional frame shape having a U-shape along the edge of the opening 26, and has a continuous protrusion 32a. Further, as shown in FIG. 3 and FIG. 4, the cross-sectional view has a substantially “U” shape, and a “U” -shaped protrusion is used as the protrusion 32 a. The protrusions 32a are directed toward the article storage space 25, and the dimensions of the protrusions 32a can be engaged with the grooves 31a of the female frame member 31. Synthetic resin is used for the material of the female frame member 31 and the male frame member 32 constituting the engaging means 3, and both frame members are integrally formed. Further, since the female frame member 31 and the male frame member 32 form a three-dimensional frame shape, the engaging member also functions as a reinforcing frame member in an assembled state.

  The lid 4 is made of a bubble sheet body 5 that is continuous with the bottom wall 21, and rises from the side that does not have the side walls 22, 23 among the side edges of the bottom wall 21. The dimensions of the lid 4 are substantially the same as the opening 26 of the packaging material body 2.

  Next, a procedure for manufacturing such a box-shaped packaging material 1 will be described.

  First, the packaging body 2 and the lid 4 made of the bubble sheet 5 are prepared (Step 1). Specifically, as shown in FIG. 5, the raw sheet of the bubble sheet 5 wound in a columnar shape is fed to a supply roll 61 at one end of the first conveyor 6 that performs the cutting and suction processes of the bubble sheet 5. Arrange. The sheet material fed from the raw sheet of the bubble sheet body 5 arranged on the supply roll 61 is fed to the first conveyor 6 body and is sandwiched between the upper and lower feed rolls 62 and then to the pressurization table 63 on the first conveyor 6. And move. The sheet material made of the bubble sheet body 5 is held horizontally on the pressure table 63. On the pressure table 63, the hydraulic press 63a is lowered, and the sheet material is cut into a shape as shown in FIG. 6 and punched out by a cutter provided on the hydraulic press 63a. Specifically, by punching out the sheet material fed out from the original fabric, the portions that will later become the packaging material body 2 and the lid portion 4 and the seal portions 281 and 282 for joining the packaging material body 2 are continuously developed. A first intermediate processed product 91 is obtained. Further, by the Thomson blade having a round blade edge provided in the hydraulic press 63a in the same manner as the blade, a thermal ruled line 27 is put in the portion indicated by the one-dot chain line in FIG. Next, the hydraulic press 63 a is raised from the pressurization table 63, and the first intermediate processed product 91 and the remaining portion of the sheet material are moved to the suction table 64 on the first conveyor 6. On the suction table 64, the first intermediate processed product 91 is transferred onto the second conveyor 7 by the suction pad 64a. The remaining portion of the sheet material other than the punched portion proceeds on the first conveyor 6 as it is, and is taken up by the take-up roll 65 at the other end of the first conveyor 6.

  The first intermediate processed product 91 transferred onto the second conveyor 7 is arranged on the second conveyor 7 as shown in FIG. That is, when the box-shaped packaging material 1 is assembled, the bottom wall 21 of the packaging material body 2 and the two lid portions 4 and 4 are adsorbed on the suction belt 71, and the top wall 24 of the packaging material body 2 is This portion is arranged so as to be placed on the folded plate 72. A suction force from below is applied on the suction belt 71. In addition, after placing the intermediate processed product 91 on the second conveyor 7, two half-fold press plates 73, 73 are placed on the right side wall 22 along the thermal ruled line 27 provided between the right side wall 22 and the top wall 24. And the vicinity of the top wall 24 side of the right side wall 22 of the bubble sheet 5 is pressed by the half-fold presser plates 73, 73. In this state, the folded plate 72 is rotated 180 degrees so as to be folded toward the half-fold holding plates 73 and 73, so that the portion other than the lid portion 4 is folded in half as shown in FIG. 21 and the left side wall 23, the top wall 24, the right side wall 22, the bottom wall side seal part 281 and the left side wall side seal part 282 are respectively obtained in the second intermediate work product 92. Thereafter, the seal bar 74 descends from above the boundary between the left side wall 23 and the left side wall seal portion 282, and the seal bar 74 has a thermal ruled line 27 between the bottom wall 21 and the bottom wall side seal portion 281 and the left side wall. The seal portions 281 and 282 are cut through the thermal ruled line 27 between the seal 23 and the left side wall seal portion 282. The cut surface of the bubble sheet 5 is melted by the heat applied at the time of cutting, and the bottom wall 21 and the left side wall 23 of the packaging material body 2 are joined at their side edges. Thereafter, when the half-fold holding plates 73 and 73 are removed from the right side wall 22 and the side walls 22 and 23 and the top wall 24 are raised, as shown in FIG. 9, the packaging material body 2 and the two lid parts 4 and 4 A third intermediate product 93 having the above is obtained.

  Next, two sets of combined bodies 33 are prepared by engaging the female frame member 31 as the first engaging member with the male frame member 32 as the second engaging member (step 2). Here, after hot melt 75 is applied to the side surface of the female frame member 31 and the bottom surface of the male frame member 32, the groove 31a of the female frame member 31 and the protrusion 32a of the male frame member 32 are engaged. Leave it in the state.

  Further, the male frame member 32 which is the second engaging member is adhered along the edge of the lid portion 4 (step 3). The bottom surface of the male frame member 32 of the combined body 33 prepared in Step 2 is adhered along the outer peripheral edge of the lid portion 4.

  Finally, the lid 4 having the coupling body 33 attached to the opening 26 of the packaging body 2 is covered with the packaging body 2 of the third intermediate processed product 93 held in a certain shape, and the combined body The female frame member 31 which is the first engaging member 33 is attached to the packaging material body 2 (step 4). That is, the third intermediate workpiece 93 produced through the process up to step 3 is sent out from the second conveyor 7 to the assembly unit 8. The assembly unit 8 is not provided with a suction belt 71 and does not receive a suction force from below. In the assembly unit 8, the side walls 22, 23 and the top wall 24 are supported by using a holding plate 81 with a suction pad so as to have an opening 26 in which the coupling body 33 can be inserted. As shown in FIG. 10, the right side wall 22 and the left side wall 23 rise up 90 degrees from the upper surface of the assembly unit 8, respectively, and are sucked and supported by holding pads 81 and 81 with suction pads that support the side walls 22 and 23. Further, the top wall 24 is sucked and supported by a holding plate 81 with a suction pad that descends from above the assembly unit 8 and supports the top wall 24. As shown in FIG. 11, with respect to the packaging material main body 2 held in a certain shape, the two front and rear cover portions 4 are raised 90 degrees by the raising plate 82 and coupled to the opening 26 of the packaging material main body 2. The lid 4 to which the body 33 is attached is covered, and the female frame member 31 of the combined body 33 is attached to the packaging material body 2. The female frame material 31 is attached to the packaging body 2 using the hot melt 75 applied around the female frame material 31 prepared in advance in step 2. After the attachment of the female frame 31 to the packaging body 2 is completed, the left and right side walls 22 and 23 and the top wall 24 are stored in the article storage space by the holding plates 81 with suction pads on the left and right side walls 22 and the top wall 24 side. By being pressed to the 25th side, adhesion between the female frame member 31, the left and right side walls 22, 23, and the top wall 24 becomes stronger.

  As described above, the box-shaped packaging material 1 according to the present embodiment is formed of a synthetic resin hollow sheet body, forms the article storage space 25 therein, and has the article on the side surface facing the article storage space 25. The wrapping material body 2 having two openings 26 that open the storage space 25 to the outside, and a hollow sheet body made of synthetic resin, and the opening 26 of the wrapping material body 2 via the engaging means 3. And the two lid portions 4 that are covered so as to be openable and closable, and the engaging means 3 is made of synthetic resin that is adhered along the edge of the opening 26 in the packaging body 2. A female frame member 31 that is one engaging member and a male member that is a second engaging member made of synthetic resin that is attached along the edge of the lid portion 4 and detachably engages with the female frame member 31. Since the box-shaped packaging material 1 is characterized by comprising the formwork material 32, It is possible to configure the body of a synthetic resin, it is possible to prevent the generation of paper dust. Further, since the lid 4 is detachably attached to the packaging material body 2 via the engaging means 3, the stored items can be taken in and out without destroying the hollow sheet body, and repeated. It can be used. Furthermore, since there are a plurality of openings 26 and lids 4, the stored items can be taken into and out of the article storage space 25 from any of the openings 26.

  A cap sheet 51 in which the hollow sheet body has a large number of bubble forming protrusions, a back sheet 52 attached to the protrusion opening side of the cap sheet 51, and a liner sheet attached to the protrusion tip side of the cap sheet 51. Therefore, it is possible to select which side of the back sheet 52 and the liner sheet 53 to be on the article storage space 25 side, and the selection is based on the properties of the stored items. Etc. can be performed. In addition, since the materials for the back sheet 52 and the liner sheet 53 can be appropriately selected, a new synthetic resin layer can be positioned on a necessary surface even when a recycled material is used. Therefore, it is easy to improve safety and quality assurance can be performed.

  In addition, since polypropylene is used as the main material of the hollow sheet body, the hinge characteristics are better than those of other synthetic resins, and it is possible to withstand folding in the production and use of the box-shaped packaging material 1 having many folding points.

  The first engagement member is a female frame member 31 having a continuous groove 31a, and the second engagement member is a male frame member 32 having a protrusion 32a that can be detachably inserted into the groove 31a. The female frame member 31 and the male frame member 32 are integrally formed of synthetic resin, and have a three-dimensional frame shape along the edge of the opening 26. The combined member will also function as a reinforcing frame member, and the stack strength can be improved without difficulty. Furthermore, the manufacturing method of the box-shaped packaging material 1 according to the present embodiment includes a step of preparing the packaging material body 2 and the lid portion 4 made of the bubble sheet body 5, and a female frame material that is a first engagement member. 31 and a step of preparing a combined body 33 in which the male frame member 32 as the second engaging member is engaged with each other, and the male frame member 32 of the combined body 33 is pasted along the edge of the lid 4. A step of attaching, and a lid 4 having a coupling body 33 attached to the opening 26 of the packaging body body 2 in a state where the packaging body body 2 is held in a fixed shape, and a female frame member of the coupling body 33 31 is attached to the packaging material body 2, so that the female frame material 31 and the male frame material 32 are adhered to the lid 4 and the packaging material body 2 in a state of being engaged with each other. Can be made. Therefore, compared with the case where the female frame member 31 and the male frame member 32 are separately attached to the lid 4 and the packaging body 2, the alignment of the engaging members is ensured, and the lid 4 is wrapped. When covering the opening 26 of the material main body 2, the occurrence of a problem that smooth engagement between the female frame material 31 and the male frame material 32 is hindered due to a shift in the attachment position between the female frame material 31 and the male frame material 32. It can be effectively prevented.

  In addition, since a total of three suction pads are used from both the side wall sides 22 and 23 and the top wall 24 side to hold the packaging material body 2 and the lid portion 4, each side of the U-shaped coupling body 33 is wrapped. The packaging material body 2 can be held in a certain shape so that it can be easily accommodated in the opening 26 provided in the material body 2. In addition, since these suction pads are attached to the holding plate, the suction on the left and right side walls 22 and 23 side and the top wall 24 side after the female frame material 31 is attached to the packaging body 2 is completed. The left and right side walls 22 and 23 and the top wall 24 are pressed toward the article storage space 25 by the pad holding plate 81, whereby the U-shaped female frame member 31, the left and right side walls 22 and 23, and the top wall 24 are bonded. The

  Furthermore, since the non-flammable hot melt 75 is used to attach the female frame material 31 and the male frame material 32 to the packaging material body 2 and the lid part 4, respectively, it is excellent in shape retention and is not toxic. Safety can be ensured even when food is added as a product.

  The present invention is not limited to the embodiment described in detail above, and the following forms are also conceivable.

  The female frame material and the male frame material that constitute the engaging means may be of a three-dimensional frame shape that forms a square shape or the like in addition to the U shape along the edge of the opening, Or the linear form provided intermittently along the edge of an opening part may be sufficient.

  As examples of other box-shaped packaging materials of the present invention, those shown in FIGS. 12 and 13 are also conceivable. FIG. 12 is a schematic explanatory view showing the engagement means A3 omitted. FIG. 13 is a perspective view showing the box-shaped packaging material A1 in an unfolded state. The box-shaped packaging material A1 is formed of a hollow sheet body such as a bubble sheet body, and forms an article storage space A25 therein, and has a single opening A26 that opens the article storage space A25 to the outside. It comprises a material body A2 and a single cover part A4 which is constituted by a hollow sheet body and is attached to the opening part A26 of the packaging material body 2 so as to be openable and closable via an engaging means A3.

  The packaging body A2 includes a bottom wall A21 and four side walls A22 that rise from the periphery of the bottom wall A21. The bottom wall A21 and the side wall A22 of the packaging material main body A2 are each integrally made of a hollow sheet body.

  The engaging means A3 is linear and includes a female frame material A31 and a male frame material A32 that is detachably engaged with the female frame material A31. As shown in FIG. 13, the engaging means A3 is provided along the outer periphery of the deployment surface when the hollow sheet body constituting the packaging body A2 and the lid A4 of the box-shaped packaging material A1 is deployed. Forms. However, at least a portion bent at a right angle in the assembled state of the box-shaped packaging material A1 in the outer periphery is left in a state in which the engagement means A3 is absent. That is, side edges that are not related to bending may be provided continuously. Specifically, the female frame material A31 and the male frame material A32 of the lid portion A4 may be continuous in a U-shape. The lid portion A4 is made of a hollow sheet body that is continuous with the packaging material body, and rises from a side edge of one surface of the side wall A29. The size of the lid A4 is substantially the same as the opening A26 of the packaging body A2.

  In such a case, since the engaging means A3 is provided along the outer periphery of the development surface, there is no need to punch out a seal portion for joining the packaging body A2 at the time of producing the intermediate processed product. The box-shaped packaging material A1 that can be used repeatedly can be assembled by engaging the frame material A31 and the male frame material A32. Moreover, since the engaging means A3 is intermittently provided in the bent part at the time of the assembly of the box-shaped packaging material A1, the packaging material main body A2 is easily developed in a planar state.

  Furthermore, what is shown by FIG.14 and FIG.15 is also considered as an example of the other box-shaped packaging material B1 of this invention. FIG. 14 is a schematic explanatory view showing the engagement means B3 omitted. FIG. 15 is a perspective view showing the box-shaped packaging material B1 in an unfolded state. As shown in FIG. 14, the box-shaped packaging material B1 is configured by a hollow sheet body such as a bubble sheet body, and has an opening B26 that forms an article storage space B25 therein and opens the article storage space B25 to the outside. A packaging material body B2 having three surfaces, and a lid B4 that is formed of a hollow sheet body and is attached to the side edge of the packaging material body B2 so as to be openable and closable via engagement means B3. .

  The packaging body B2 includes a bottom wall B21 and two side walls B22 that rise from both side edges of the bottom wall B21. The bottom wall B21 and the side wall B22 of the packaging material main body B2 are each integrally made of a hollow sheet body. The engaging means 3 is linear, and includes a female frame member 31 and a male frame member 32 that is detachably engaged with the female frame member 31. As shown in FIG. 15, the engaging means is provided along the outer periphery of each development surface when the hollow sheet body constituting the packaging material body and the lid portion of the box-shaped packaging material is later developed. Make. However, at least a portion bent at a right angle in the assembled state of the box-shaped packaging material B1 in the outer periphery is left in a state in which the engagement means B3 is absent. That is, side edges that are not related to bending may be provided continuously. Specifically, the female frame material B31 and the male frame material B32 may be continuous in a U-shape. The lid B4 is made of a hollow sheet body that is not continuous with the packaging material body B2, and as shown in FIG. 14, when assembled, so as to cover the storage space B25 from the direction orthogonal to the packaging material body B2. It is attached to the side edge of the packaging material body B2.

  In such a case, since the engaging means B3 is provided along the outer periphery of the development surface, there is no need to punch out a seal portion for joining the packaging body B2 when creating the intermediate processed product, The box-shaped packaging material B1 that can be used repeatedly can be assembled by the operation of engaging the frame material B31 and the male frame material B32. Moreover, since the engaging means B3 is intermittently provided in the bent part at the time of the assembly of the box-shaped packaging material B1, the packaging material main body B2 is easily expanded in a flat state. Moreover, since the punching shape of the hollow sheet body is a relatively simple shape as compared with other embodiments, the raw sheet of the hollow sheet body can be used more rationally. Further, since the three surfaces can be opened, it is easy to put in and out the stored items.

  Further, in the present embodiment, hot melt is used for bonding the female frame material and the male frame material to the hollow sheet body, but the present invention is not limited to this, and thermoplastic polypropylene is used as the hollow sheet body. For example, thermal welding using a heating plate or ultrasonic welding using an ultrasonic welder may be considered.

  In addition, the specific configuration of each part is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

The perspective view of the closed state of the box-shaped packaging material which concerns on embodiment of this invention. The perspective view of the open state of the box-shaped packaging material which concerns on the same embodiment. The fragmentary sectional view of the closed state of the engaging means vicinity which concerns on the same embodiment. The fragmentary sectional view of the open state of the engaging means vicinity which concerns on the embodiment. The front schematic of the 1st conveyor used with the manufacturing method of the box-shaped packaging material which concerns on the same embodiment. The perspective view of the 1st intermediate workpiece which concerns on the same embodiment. The plane schematic of the 2nd conveyor used with the manufacturing method of the box-shaped packaging material which concerns on the same embodiment. The perspective view of the 2nd intermediate workpiece based on the embodiment. The perspective view of the 3rd intermediate workpiece based on the embodiment. The figure showing the state before suction pad mounting | wearing with the assembly unit which manufactures the box-shaped packaging material which concerns on the same embodiment. The figure showing the state after suction pad mounting | wearing by the assembly unit which manufactures the box-shaped packaging material which concerns on the same embodiment. Schematic explanatory drawing which shows other embodiment of this invention. The expanded view of the embodiment. Schematic explanatory drawing which shows other embodiment of this invention. The expanded view of the embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 1A, 1B ... Box-shaped packaging material 2, 2A, 2B ... Packaging material main body 25, 25A, 25B ... Article storage space 26, 26A, 26B ... Opening part 3, 3A, 3B ... Engagement means 31, 31A, 31B ... Female frame material 32, 32A, 32B ... Male frame material 33 ... Combined body 4, 4A, 4B ... Lid 5 ... Bubble sheet body 51 ... Cap sheet 52 ... Back sheet 53 ... Liner sheet 64a ... Suction pad 75 ... Hotmelt

Claims (8)

  A packaging material body which is formed of a synthetic resin hollow sheet body and forms an article storage space therein and has an opening for opening the article storage space to at least one surface; and a synthetic resin hollow sheet body And a lid portion that is openably and closably attached to an opening portion of the packaging material body via an engagement means, and the engagement means extends along an edge of the opening portion in the packaging material body. A first engaging member made of synthetic resin, and a second engaging member made of synthetic resin, which is attached along the edge of the lid and detachably engages with the first engaging member; A box-shaped packaging material characterized by comprising.   The hollow sheet body includes a cap sheet having a large number of bubble forming protrusions, a back sheet attached to the protrusion opening side of the cap sheet, and a liner sheet attached to the protrusion leading end side of the cap sheet. The box-shaped packaging material according to claim 1, which is a three-layered bubble sheet.   The box-shaped packaging material according to claim 1 or 2, wherein the hollow sheet body is composed of a polyolefin as a main material.   Either the first engagement member or the second engagement member is a female frame member having a continuous groove, and the other is a male frame member having a protrusion that can be detachably pressed into the groove. The box-shaped packaging material according to claim 1, 2 or 3.   A method for producing a box-shaped packaging material according to claim 1, wherein a step of preparing a packaging material body and a lid made of a hollow sheet body, and a first engagement member and a second engagement member are mutually connected. A step of preparing a combined body to be engaged, a step of attaching a second engagement member of the combined body along an edge of the lid, and a state in which the packaging material body is held in a certain shape. And a step of covering the opening of the packaging material body with a lid portion to which the combined body is attached and attaching a first engaging member of the combined body to the packaging material body. A method for producing a box-shaped packaging material.   A method for producing a box-shaped packaging material according to claim 1, wherein a step of preparing a packaging material main body and a lid made of a hollow sheet body, and a first engagement member and a second engagement member are mutually connected. A step of preparing a joined body to be engaged; a step of attaching a first engagement member of the joined body along an edge of the packaging material body; and a packaging material body or the lid to which the joined body is attached A step in which the lid is attached to the packaging body while at least one of the portions is held in a certain shape, and a second engaging member of the combined body is attached to the lid. A method for producing a box-shaped packaging material.   The manufacturing method of the box-shaped packaging material of Claim 5 or 6 which hold | maintains at least one of the said packaging material main body or the said cover part to a fixed shape using a suction pad.   The method for manufacturing a box-shaped packaging material according to claim 5, 6 or 7, wherein the first and second engaging members are respectively attached to the packaging material main body and the lid using hot melt.

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