JP5409512B2 - Packaging case - Google Patents

Description

  The present invention relates to a packaging case for packaging a product such as an electronic device.

  Conventionally, as described in Patent Documents 1 and 2, a packaging case for packaging a product is generally provided with an opening on the upper surface of the packaging case, and a product is taken in and out from above. However, when the packaged product is heavy, such as an electronic device, it is necessary to lift and remove the product in an unstable posture when unpacking, which may cause an accident such as dropping the product.

  In order to solve the above-mentioned problems, a method is conceivable in which an opening is provided on the side surface of the packaging case and the product is pulled out in the lateral direction. However, when the opening is provided on the side surface, the strength of the packaging case against the load from above is lowered, and there is a problem that the packaging case after packing cannot be loaded and stored.

Japanese Utility Model Publication No. 56-128823 No. 4-9304

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a packaging case that can draw a heavy object such as an electronic device in the horizontal direction, has excellent unpacking workability, and has sufficient strength in the vertical direction. And

  In order to achieve the above object, the present invention provides a case main body that is formed in a cylindrical shape with a bottom surface and a top surface and a pair of side surfaces that are coupled to opposite edges of the bottom surface and the top surface, and stores an object to be packed. A flap connected to both left and right edges of the opening of the case body via a fold line, and a cylindrical support formed at the free end of the flap, and the opening is opened by the flap. When a force in the compression direction is applied to at least the bottom surface and the top surface in the closed state, the upper end and the lower end of the support column are packaging cases that contact the inside of the bottom surface and the top surface, respectively.

  Further, the present invention is characterized in that, in the packaging case having the above-described configuration, a reinforcing plate that is connected to one upper edge of the side surface via a fold line and overlaps the top surface from the inside is provided.

  According to the present invention, in the packaging case having the above-described configuration, the reinforcing plate is formed with a notch that engages with the support when the opening is closed by the flap.

  According to the present invention, in the packaging case configured as described above, the support column is formed by bending a free end of the flap into a triangular prism shape.

  According to the present invention, in the packaging case having the above-described configuration, a drawable tray for placing an article to be packed is disposed in the case body.

  According to the present invention, in the packaging case configured as described above, the tray is formed with a tray positioning portion that engages with the support when the opening is closed by the flap.

  Further, the present invention is characterized in that, in the packaging case having the above-described configuration, a U-shaped sheet material having a grip portion is disposed between the tray and the article to be packed.

  According to the present invention, in the packaging case having the above-described configuration, the tray includes a tray positioning portion that engages with the support when the opening is closed by the flap, and the sheet material includes the flap. A sheet material positioning portion that is engaged with the support column when the opening is closed is formed.

  According to the present invention, in the packaging case configured as described above, a recess is formed in the cushioning material disposed between the case main body and the article to be packaged so that the support column is engaged when the opening is closed by the flap. It is characterized by being.

  Further, the present invention is characterized in that, in the packaging case having the above-described configuration, a lid member is provided which is connected to the upper and lower end edges of the opening via a folding line and overlaps the flap from the outside.

  Further, the present invention is characterized in that the packaging case having the above-described configuration is provided with a holding mechanism that holds the lid member connected to the upper end edge of the opening portion in a folded state above the top surface.

  According to the first configuration of the present invention, the packaged item can be pulled out in the lateral direction from the opening formed on the side surface of the case body with the flap opened, so that the heavy packaged item is lifted high. Can be easily taken out without any problems. In addition, when the flap is closed, when the force in the compression direction is applied to at least the bottom surface and the top surface, the support column is disposed so as to contact the bottom surface and the top surface of the case body. Strength is improved, and it is possible to load and store a packaging case packed with heavy objects. Furthermore, since the square columnar column portion also has a buffering effect, it is possible to suppress damage to the packed object due to external force.

  Moreover, according to the 2nd structure of this invention, in the packaging case of the said 1st structure, it connects with the upper end edge of one side surface via a fold line, and provides the top plate with the reinforcement board which overlaps from the inside. Further, the strength of the top surface can be further improved to suppress the bending.

  Further, according to the third configuration of the present invention, in the packaging case of the second configuration described above, by forming a notch portion with which the support column portion engages when the opening is closed by a flap on the reinforcing plate, It is possible to prevent the flap from falling into the inside of the case main body, and to suppress deformation of the packaging case during transportation and storage.

  Further, according to the fourth configuration of the present invention, in the packaging case having any one of the first to third configurations, the free end of the flap is bent into a triangular prism shape to form the column portion, thereby Deformation of the column due to pressure can be further reduced.

  Further, according to the fifth configuration of the present invention, in the packaging case having any one of the first to fourth configurations, by arranging a pullable tray for placing an article to be packed in the case body. The packaged item can be easily pulled out from the case body. Moreover, since it becomes a double structure by the bottom face of a case main body and the baseplate of a tray, the intensity | strength of the bottom part of a packaging case also improves.

  According to the sixth configuration of the present invention, in the packaging case of the fifth configuration, the tray positioning portion that engages with the support column when the opening is closed by the flap is formed on the tray. The tray on which the object is placed can be positioned with high accuracy, and rattling of the tray in the case body can be suppressed.

  Further, according to the seventh configuration of the present invention, in the packaging case of the fifth configuration, a U-shaped sheet material having a grip portion formed between the tray and the article to be packed is disposed. Thus, the item to be packed pulled out from the case body can be easily lowered from the tray.

  According to the eighth configuration of the present invention, in the packaging case of the seventh configuration, the tray positioning portion with which the support column portion engages when the opening is closed by the flap is formed on the tray, and the opening is opened by the flap. By forming a sheet material positioning portion on the sheet material that engages with the support when the column is closed, it is possible to accurately position the tray and the sheet material on which the items to be packed are placed, and within the case body. Shaking of the tray and sheet material can also be suppressed.

  According to the ninth configuration of the present invention, in the packaging case having any one of the first to eighth configurations, the cushioning material is disposed between the case main body and the packaged item, and the cushioning material has the support column. By forming the concave portion with which the portion engages, the object to be packed can be positioned with high accuracy through the cushioning material, and rattling of the object to be packed in the case body can also be suppressed.

  According to the tenth configuration of the present invention, in the packaging case having any one of the first to ninth configurations, the lid is connected to the upper and lower end edges of the opening via the folding line and overlaps the flap from the outside. By providing the member, the opening can be more reliably sealed using the flap and the lid member.

  According to the eleventh configuration of the present invention, in the packaging case of the tenth configuration, a holding mechanism is provided that holds the lid member connected to the upper end edge of the opening in a state of being folded back above the top surface. As a result, the lid member can be prevented from drooping to the opening side without pressing the lid member by hand, so that the work to pull out the packaged object can be easily performed.

The expanded view of the case main body which comprises the packaging case which concerns on one Embodiment of this invention The perspective view which shows the state which assembled the case main body of FIG. A perspective view of the tray placed in the case body as seen from above The perspective view which looked at the state which has arranged the lower buffer material on the tray from the upper part The perspective view which looked at the state which has arranged the lower shock absorbing material and the main pad on the tray from the upper part Schematic view of the packaging case of the present invention packed with an article to be packed as viewed from the opening 5a side. The schematic which looked at the packaging case of this invention with which the to-be-packaged item was packed from the left side surface 4a side Cross-sectional enlarged view of the column portions 8c and 8d in the state where the rear flaps 7a and 7b are closed. The perspective view which shows the unpacking procedure of the packaging case of this invention The partial perspective view of a case main body which shows the state which folded and hold | maintained the upper cover 9a to the top | upper surface 3 side

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an exploded view of a case body constituting the packaging case of the present invention. The case body 1 is formed by bending a sheet material such as a corrugated cardboard sheet punched into a predetermined shape. Specifically, the first sheet material 1a constituting the bottom surface 2 and the lower lid 9b, the top surface 3, the left side surface 4a, the front flap 6a, the rear flap 7a, and the second sheet material 1b constituting the upper lid 9a, The right side surface 4b, the front flap 6b, the rear flap 7b, and the third sheet material 1c constituting the reinforcing plate 12 are formed.

  The assembly procedure of the case body 1 will be described. First, two opposing sides (two sides in the vertical direction in FIG. 1) of the bottom surface 2 of the first sheet material 1a, the joining piece 1ba and the third sheet of the second sheet material 1b. The joining piece 1ca of the material 1c is joined. Next, the reinforcing plate 12 is overlapped and joined to the inside of the top surface 3 to form a rectangular tube-shaped case main body 1 (see FIG. 2). Finally, the end portions of the front flaps 6a and 6b and the rear flaps 7a and 7b are bent into a cylindrical shape along the fold line to form the column portions 8a to 8d (see FIG. 2).

  FIG. 2 is a perspective view showing a state in which the case body is assembled. The case body 1 has a rectangular tube shape including a bottom surface 2, a top surface 3, a left side surface 4a, and a right side surface 4b. Openings 5a and 5b are formed on the front and rear surfaces. A pair of front flaps 6a and 6b are formed at the left and right edges of the opening 5a so as to be continuous with the left side surface 4a and the right side surface 4b via folding lines. Similarly, a pair of rear flaps 7a and 7b are formed on the left and right edges of the opening 5b via folding lines.

  The free ends of the front flaps 6a and 6b and the rear flaps 7a and 7b are each bent into a triangular prism shape to form support columns 8a to 8d. Further, an upper lid 9a that is continuous with the top surface 3 via a fold line is formed at the upper edge of the openings 5a and 5b, and a lower lid that is continuous with the bottom surface 2 via a fold line at the lower edge of the openings 5a and 5b. A lid 9b is formed. The upper lid 9a and the lower lid 9b on the opening 5a side have two through holes 10a and 10b, respectively. The front flaps 6a and 6b have a through hole 10a when the upper lid 9a and the lower lid 9b are closed. Through holes 10c and 10d are formed at positions overlapping with 10b. Between the top surface 3 and the upper lid 9a on the opening 5a side, two cuts 11 intersecting with the folding line are formed.

  A reinforcing plate 12 is connected to the upper edge of the right side surface 4b via a fold line, and the reinforcing plate 12 is fixed so as to overlap the top surface 3 from the inside of the case body 1. The reinforcing plate 12 is formed with triangular notches 12a and 12b that engage with the support columns 8a to 8d when the front flaps 6a and 6b and the rear flaps 7a and 7b are closed.

  FIG. 3 is a perspective view of the tray placed in the case body as viewed from above. As shown in FIG. 3, the tray 13 includes a bottom plate 14 and side walls 15 formed so as to surround the peripheral edge of the bottom plate 14, and the side walls 15 facing the openings 5 a and 5 b of the case body 1. Is missing the approximate center. In addition, tray positioning portions 16a and 16b are formed in a portion where the side wall 15 at the peripheral edge of the bottom plate 14 is missing. The tray positioning portion 16a has a rectangular shape, and a gripping portion 17 that is continuous with the bottom plate 14 through a fold line is formed. The tray positioning portion 16b is formed in a triangular shape like the notches 12a and 12b (see FIG. 2).

  Next, a method for packing an article to be packed using the packaging case of the present invention will be described. First, as shown in FIG. 4, two lower cushioning materials 18 are placed on the bottom plate 14 of the tray 13 along the side wall 15. A product placement surface 18a is formed on the lower cushioning material 18 in accordance with the shape of the article to be packed. As the material of the lower cushioning material 18 and the upper cushioning material 19 (described later), various conventionally known materials such as a hollow pulp mold, a laminated cardboard, or a soft resin such as expanded polystyrene can be used. On the other hand, the rear flaps 7a and 7b of the case body 1 are closed, and the upper lid 9a and the lower lid 9b overlapping the rear flaps 7a and 7b are closed with an adhesive tape or the like.

  Next, as shown in FIG. 5, the main pad 20 is placed on the tray 13 and the lower cushioning material 18. The main pad 20 is a sheet material that is bent into a substantially U-shaped cross section including a bottom portion 20a and a pair of side portions 20b extending upward at opposing edges of the bottom portion 20a. A bent portion 22 is formed along the shape of the material 18. Pad positioning portions 21 a and 21 b are formed on the bottom portion 20 a of the main pad 20 according to the shape of the tray positioning portions 16 a and 16 b (see FIG. 4) of the tray 13. A handle 20c is formed on the side portion 20b.

  Next, the article 23 (see FIG. 6) is placed on the product placement surface 18a of the lower cushioning material 18 with the main pad 20 interposed therebetween, and the upper cushioning material 19 (see FIG. 6) is placed on the top of the article 23. Installing. Then, a power cord, an instruction manual, an accessory 40 such as a CD-ROM (see FIG. 9) is placed on the upper cushioning material 19, and the tray 13 is pushed into the case body 1 from the opening 5a of the case body 1. The front flaps 6a and 6b, the upper lid 9a, and the lower lid 9b are closed sequentially. Finally, the fastener 25 (see FIG. 9) is inserted into the through hole 10a and the through hole 10c, the through hole 10b and the through hole 10d (both see FIG. 2), and the front flaps 6a and 6b. The upper lid 9a and the lower lid 9b are fixed to complete the packing operation.

  6 and 7 are schematic views of the packaging case of the present invention packed with an article to be packed as viewed from the opening 5a side and the left side surface 4a side, respectively, and FIG. 8 shows the column portions 8c and 8d and the tray. 13 is an enlarged cross-sectional view showing a state where 13 tray positioning portions 14b and a pad positioning portion 21b of the main pad 20 are engaged. 6 and 7, the front flaps 6a and 6b and the left side surface 4a are not shown, and the inside is visible.

  The packaging case 100 includes a case body 1 having openings 5a and 5b formed on the side surfaces, and a tray 13 that is placed on the bottom surface 2 of the case body 1 and places an article 23 to be packaged. A lower cushioning material 18 and a main pad 20 are disposed between the lower portion of the package and the tray 13, and an upper cushioning material 19 is disposed between the upper portion of the article to be packed 23 and the case body 1. A longitudinal groove-like recess 19a is formed at a substantially central portion of the upper cushioning material 19 on the side of the openings 5a and 5b. Although not shown here, an accessory 40 (see FIG. 9) is accommodated in the gap between the upper cushioning material 19 and the case body 1.

  The support portions 8a and 8b of the front flaps 6a and 6b hold the gripping portion 17 of the tray 13 in an upright state, while the cutout portion 12a (see FIG. 2) of the reinforcing plate 12 and the tray positioning portion 16a of the tray 13 (see FIG. 2). 3) and the pad positioning portion 21a of the main pad 20 (see FIG. 4). The post portions 8c and 8d of the rear flaps 7a and 7b are formed by a notch 12b (see FIG. 2) of the reinforcing plate 12, a tray positioning portion 16b (see FIG. 3) of the tray 13, and a pad positioning portion 21b (see FIG. 3). (See FIG. 4). Further, the column portions 8 a and 8 b and the column portions 8 c and 8 d are also engaged with the concave portion 19 a of the upper cushioning material 19.

  According to this structure, it arrange | positions so that the upper end and lower end of support | pillar part 8a-8d may contact the inner surface of the bottom face 2 of the case main body 1, and the top | upper surface 3 in the state which closed the front flaps 6a and 6b and the rear flaps 7a and 7b. Therefore, the longitudinal strength of the case body 1 is improved, and the packaging case 100 can be loaded and stored. Further, since the support column portions 8a to 8d are engaged with the cutout portions 12a and 12b of the reinforcing plate 12, the front flaps 6a and 6b and the rear flaps 7a and 7b are not likely to fall into the inside of the case main body 1 due to external pressure. Therefore, the deformation of the packaging case 100 during transportation or storage can be suppressed.

  In addition, even if there is a gap between the bottom surface 2 and the top surface 3 immediately after the front flaps 6a and 6b and the rear flaps 7a and 7b are closed, the upper ends and lower ends of the support columns 8a to 8d are not in contact with each other. What is necessary is just to contact the inner side of the bottom face 2 and the top | upper surface 3 when the load of a compression direction is applied to the bottom | bottom 2 and the top | upper surface 3 by loading the packaging case 100 or pressing from the top.

  Further, since the column portions 8a to 8d are engaged with the tray positioning portions 16a and 16b of the tray 13, the pad positioning portions 21a and 21b of the main pad 20, and the concave portion 19a of the upper cushioning material 19, the tray in the case main body 1 13. The positioning of the main pad 20 and the positioning of the article to be packed 23 placed thereon can be easily and accurately performed, and rattling of the article to be packed 23 can be effectively suppressed.

  Furthermore, since the cross sections of the support columns 8a to 8d are triangular, the support columns 8a to 8d are not easily deformed with respect to the pressure from the side surface, and are formed in a hollow shape. Alternatively, it has an effect of buffering an impact from the outside when it falls with the opening 5b side down.

  In addition, although the support | pillar parts 8a-8d were made into the triangular prism here, it is good also as the support | pillar part 8a-8d of square pillar shape, for example, and the free ends of the front flaps 6a and 6b and the rear flaps 7a and 7b are curved in roll shape. It is good also as cylindrical support | pillar part 8a-8d. In that case, the notches 12a and 12b of the reinforcing plate 12, the tray positioning portions 16a and 16b of the tray 13, the pad positioning portions 21a and 21b of the main pad 20, and the concave portion 19a of the upper cushioning material 19 are also formed on the support columns 8a to 8d. The shape may be changed.

  Moreover, since the strength of the top surface 3 of the packaging case 100 is ensured by overlapping the reinforcing plate 12 on the top surface 3, the strength of the top surface 3 when the packaging case 100 is loaded and stored. Deflection can be suppressed. Further, since the bottom plate 14 of the tray 13 overlaps the bottom surface 2, the bottom surface 2 of the packaging case 100 has a double structure like the top surface 3, and the bending of the bottom surface 2 is also suppressed.

  In addition, if the cross-sectional area of the support | pillar parts 8a-8d becomes small, the intensity | strength of the case main body 1 will fall. On the other hand, when the cross-sectional area of the column portions 8a to 8d is increased, the ratio of the column portions 8a to 8d occupying the case body 1 is increased, and the storage space for the article to be packed 23 is decreased. Accordingly, the cross-sectional areas of the support columns 8a to 8d may be set as appropriate according to the size of the article 23 to be packed in the packaging case 100, the strength required for the case body 1, and the like.

  Moreover, in the said embodiment, although the support | pillar part 8a-8d was arrange | positioned in the center part of opening part 5a, 5b, from a viewpoint of improving the intensity | strength of the vertical direction of the case main body 1, support | pillar part 8a and 8b, support | pillar part 8c, It is preferable to arrange 8d at positions separated from the center of the openings 5a and 5b in the left-right direction. In this case, a gap is generated between the front flaps 6a and 6b and between the rear flaps 7a and 7b. However, the upper lid 9a and the lower lid 9b exist outside the front flaps 6a and 6b and the rear flaps 7a and 7b. There is no particular problem.

  When unpacking the packed packaging case 100, first, as shown in FIG. 9, the fastener 25 is removed, and the upper lid 9a, the lower lid 9b, and the front flaps 6a and 6b are opened. Then, the upper lid 9a is rotated upward and bent so as to overlap the top surface 3. Then, as shown in FIG. 10, the space between the two cuts 11 is bent upward to form the cut-up 30. A restoring force that attempts to rotate in the direction away from the top surface 3 (the direction of arrow A in FIG. 10) acts on the upper lid 9a, but due to the frictional force generated between the cut-up 30 and the upper lid 9a in the notch 11. The rotation of the upper lid 9a is restricted.

  Returning to FIG. 9, when the front flaps 6a and 6b are opened, the gripping portion 17 of the tray 13 held by the front flaps 6a and 6b falls forward due to the restoring force of the sheet, so that the operator grips the gripping portion 17. Then, the tray 13 is pulled out from the case body 1. As a result, the lower cushioning material 18, the upper cushioning material 19, the main pad 20, the article to be packed (copier) 23, and the accessory 40 placed on the tray 13 are also pulled out together with the tray 13.

  Next, after removing the upper cushioning material 19 and the accessory 40, the handle 20 c of the main pad 20 is gripped to lift the article to be packed 23 and drop it from the tray 13. Finally, the main pad 20 is opened on both sides and the packaged item 23 is taken out.

  According to the packaging case 100 of the present invention, the object to be packed 23 is pulled out in the horizontal direction together with the tray 13 from the opening 5a formed on the side surface of the case body 1, so that the object to be packed is taken out from the upper surface of the case body 1. There is no need to lift the package 23 high. Therefore, when the packaged item 23 is a heavy item such as an electronic device, the unpacking workability is improved, and the packaged item 23 is dropped and damaged at the time of unpacking, or the operator is injured. There is no fear.

  Further, since the article to be packed 23 is packed in the case main body 1 while being placed on the tray 13, the article to be packed 23 can be easily pulled out from the case main body 1 together with the tray 13. Further, since the main pad 20 is disposed between the tray 13 and the object to be packed 23, the object to be packed 23 can be lifted by holding the handle 20 c of the main pad 20 and can be easily lowered from the tray 13. In particular, as shown in FIG. 9, when the object to be packed 23 is a copying machine, if the upper part of the copying machine is gripped and lifted, an unreasonable force is applied to the optical system of the image reading device disposed on the upper part of the copying machine. Since there exists a possibility of a fear, the structure which lifts a copying machine with the main pad 20 is preferable.

  Further, by forming the cut-and-raised 30, it is possible to prevent the upper lid 9a from drooping toward the opening 5a, so that it is not necessary to hold the upper lid 9a by hand, and the tray 13 can be easily pulled out. .

  In addition, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the meaning of this invention. For example, in the above embodiment, the lower cushioning material 18 is not limited to the configuration of being arranged along two sides of the tray 13 as shown in FIG. You may arrange four in four corners.

  Moreover, although the said embodiment demonstrated the packaging case 100 which provided the upper cover 9a and the lower cover 9b on the outer side of the front flaps 6a and 6b and the rear flaps 7a and 7b, the upper cover 9a and the lower cover 9b are essential components. The front flaps 6a and 6b and the rear flaps 7a and 7b can also be used as a lid.

  Moreover, although the said embodiment demonstrated the packaging case 100 which mounts the to-be-packaged object 23 on the tray 13 via the main pad 20, and packs it in the case main body 1, the main pad 20 is an essential component. Alternatively, the lower cushioning material 18 may be disposed on the tray 13 and the article to be packed 23 may be directly placed thereon. Further, the object to be packed 23 on which the lower cushioning material 18 and the upper cushioning material 19 are mounted can be stored in the case body 1 without using the tray 13.

  INDUSTRIAL APPLICABILITY The present invention can be used for a packaging case that packs heavy items such as electronic devices, and has a rectangular tube-shaped case main body that is open at two opposing side surfaces, and fold lines at the left and right ends of each opening. A flap that is connected and that can open and close each opening; and a post that is formed by bending the free end of the flap into a square tube, and when the opening is closed by the flap, the upper and lower ends of the support Are packaging cases that are in contact with the bottom surface and the inside of the top surface, respectively.

  As a result, it is possible to provide a packaging case that can pull out the article to be packed in the horizontal direction, has excellent unpacking workability, and has sufficient strength in the vertical direction.

DESCRIPTION OF SYMBOLS 1 Case main body 2 Bottom surface 3 Top surface 4a Left side surface 4b Right side surface 5a, 5b Opening 6a, 6b Front flap 7a, 7b Rear flap 8a-8d Support | pillar part 9a Top cover (lid member)
9b Lower lid (lid member)
10a to 10d Through-hole 11 Notch 12 Reinforcement plate 12a Notch 13 Tray 16a, 16b Tray positioning part 17 Grasping part 18 Lower cushioning material 19 Upper cushioning material 20 Main pad (sheet material having a U-shaped cross section)
21a, 21b Pad positioning part (sheet material positioning part)
23 To-be-packaged items 30 Cut and raise
100 packaging case

Claims (9)

A case main body that is formed into a cylindrical shape with a bottom surface and a top surface and a pair of side surfaces that are connected to opposite edges of the bottom surface and the top surface,
A flap connected to the left and right edges of the opening of the case body via a fold line;
A cylindrical support formed at the free end of the flap;
Have
Is closed the opening by the flap, when at least the bottom surface and the force in the compressing direction to the top surface is applied, the upper and lower ends of the strut is in contact with the inside of said bottom surface and said top surface respectively ,
Connected to one upper edge of the side surface via a fold line, and provided with a reinforcing plate overlapping the top surface from the inside,
A packaging case , wherein the reinforcing plate is formed with a notch that engages with the support when the opening is closed by the flap . The packaging case according to claim 1, wherein a pullable tray for placing an object to be packed is disposed in the case body . A case main body that is formed into a cylindrical shape with a bottom surface and a top surface and a pair of side surfaces that are connected to opposite edges of the bottom surface and the top surface,
A flap connected to the left and right edges of the opening of the case body via a fold line;
A cylindrical support formed at the free end of the flap;
Have
When a force in the compression direction is applied to at least the bottom surface and the top surface with the opening closed by the flap, the upper end and the lower end of the support column come into contact with the bottom surface and the inside of the top surface, respectively. With
A drawerable tray for placing an object to be packed is disposed in the case body, and the tray is formed with a tray positioning portion that engages with the support column when the opening is closed by the flap. packaging case characterized in that. The packaging case according to claim 2 or 3, wherein a sheet material having a U-shaped cross section in which a grip portion is formed is disposed between the tray and an object to be packed . The packaging case according to claim 4, wherein the sheet material is formed with a sheet material positioning portion that engages with the support when the opening is closed by the flap . A case main body that is formed into a cylindrical shape with a bottom surface and a top surface and a pair of side surfaces that are connected to opposite edges of the bottom surface and the top surface,
A flap connected to the left and right edges of the opening of the case body via a fold line;
A cylindrical support formed at the free end of the flap;
Have
When a force in the compression direction is applied to at least the bottom surface and the top surface with the opening closed by the flap, the upper end and the lower end of the support column come into contact with the bottom surface and the inside of the top surface, respectively. With
The case body and the buffer material disposed between the object to be packed, packaging case the strut is it characterized in that recess engagement is formed when closing the opening by the flap. The strut packaging case according to any one of claims 1 to 6, characterized in that it is formed by bending a free end of said flap triangular. The linked via a fold line to the upper and lower end edge of the opening, the packaging case according to any one of claims 1 to 7, characterized in that a lid member that overlaps from the outside the flap. The packaging case according to claim 8, further comprising a holding mechanism that holds the lid member connected to the upper end edge of the opening in a state of being folded back above the top surface .

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