Packing box

Abstract

To provide a packing box that facilitates storing work and taking-out work for a roll body with a core rod.SOLUTION: A packing box 1 is used to contain a roll body 20 with a core rod which is formed by rolling a sheet material around the hollow core rod 21 extending in a right-left direction and provided with opening holes 21b on end faces. At least a part of one side wall 4A between right and left side walls 4A, 4B of the packing box 1 is a folded piece 5 for folding at least a part of the side wall 4A outward. The packing box 1 is so constituted that an opening window 6 in which a first opening hole 21b of the core rod 21 of the roll body 20 with the core rod is exposed to the outside and is open upward is formed at the part of the folded part 5 of the side wall 4a to be folded by folding the folded piece 5 outward relative to the side wall 4A.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a packing box for storing a roll body with a mandrel, and a package in which the roll body with a mandrel is stored in the packing box.

[0002] In this specification and the claims, for convenience of explanation, the direction in which the mandrel extends is defined as the left - right direction of the roll body with a mandrel and the packing box.

Background Art

[0003] Long sheet materials such as metal foil materials (e.g., aluminum foil materials), packaging materials (e.g., resin film materials, metal laminate film materials) are generally conveyed as roll bodies with mandrels wound around the mandrels. When being conveyed, the roll bodies with mandrels are stored (packed) in a packing box. As packing boxes for storing roll bodies with mandrels, for example, storage cases and cardboard cases disclosed in Patent Documents 1 and 2 are known.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] By the way, when the roll body with a mandrel is heavy, the operation of storing the roll body with a mandrel in the packing box and the operation of taking it out from the packing box become difficult.

[0006] The present invention has been made in view of the above - described technical background, and an object of the present invention is to provide a packing box and a package that facilitate the storage operation and the taking - out operation of the roll body with a mandrel.

Means for Solving the Problems

[0007] The present invention provides the following means.

[0008] 1) A packing box for storing a roll body with a mandrel, in which a sheet material is wound in a roll shape around a hollow mandrel extending in the left - right direction and having an opening hole provided in an end face, wherein at least one of the left and right side walls has at least a part of the side wall formed as a bending piece that can be bent outward, and when the bending piece is bent outward with respect to the side wall, an opening window is formed in a portion of the side wall before bending of the bending piece, such that the opening hole of the mandrel of the roll body with a mandrel is exposed outward and opened upward.

[0009] 2) The packing box according to item 1 above, wherein an upper inner flap is integrally connected to an upper edge of the bending piece.

[0010] 3) The packing box according to item 1 or 2 above, wherein a support plate for supporting an end portion of the mandrel from below is provided inside the side wall, and a receiving recess that is open upward for receiving the end portion of the mandrel from below is formed in the support plate.

[0011] 4) The packing box according to item 3 above, further comprising a pressing plate for pressing the end portion of the mandrel received in the receiving recess of the support plate from above, and an insertion gap into which the pressing plate is inserted when pressing the end portion of the mandrel from above is formed in an intermediate portion in the thickness direction of the support plate.

[0012] 5) The packing box according to any one of items 1 to 4 above, wherein a part of the side wall is the bending piece.

[0013] 6) The packing box according to any one of items 1 to 5 above, wherein the bending piece is provided only on one of the left and right side walls.

[0014] 7) A packaged item in which a roll body with a mandrel, in which a sheet material is wound in a roll shape around a hollow mandrel extending in the left - right direction and having an opening hole provided in an end face, is stored in a packing box, wherein at least one of the left and right side walls of the packing box has a bent piece in at least a part of the side wall that can be bent outward, the packing box is configured such that when the bent piece is bent outward, an opening window that is open upward is formed in a portion of the side wall before the bending of the bent piece, the roll body with a mandrel is stored in the packing box such that when the bent piece is bent outward, the opening hole of the mandrel is exposed to the outside from the opening window.

Advantages of the Invention

[0015] The present invention has the following effects.

[0016] In the above item 1, by bending the bent piece of the side wall of the packing box outward with respect to the side wall, the opening hole of the mandrel is exposed from the upward - opening opening window. Therefore, when taking out the roll body with a mandrel from the packing box, a rod member (e.g., a robot arm) that can be driven in the vertical direction is horizontally inserted into the opening hole of the mandrel exposed from the opening window from the side and lifted, whereby the roll body with a mandrel is taken out from the packing box. Thus, the operation of taking out the roll body with a mandrel from the packing box can be easily performed.

[0017] Also, when storing the roll body with a mandrel in the packing box, the roll body with a mandrel is lifted by horizontally inserting a rod member into the opening hole of the mandrel from the side and lifting it, and the bent piece is bent outward with respect to the side wall to form an opening window that is open upward in the side wall. In this state, the rod member is lowered so that the rod member moves downward from the upper side of the opening window to the inside of the opening window, whereby the roll body with a mandrel is moved from the upper side of the packing box to the inside of the packing box and the roll body with a mandrel is stored in the packing box. By doing so, the operation of storing the roll body with a mandrel in the packing box can also be easily performed.

[0018] In the above item 2, since the upper inner flap is integrally connected to the upper edge of the bent portion, when the bent piece is bent outward with respect to the side wall, the upper inner flap is also moved outward with respect to the side wall integrally with the bent piece. Therefore, during the storage operation and the removal operation of the roll body with a mandrel, it is possible to prevent the rod member inserted into the opening hole of the mandrel and the roll body with a mandrel from interfering with the upper inner flap. Accordingly, the storage operation and the removal operation of the roll body with a mandrel can be surely and easily performed.

[0019] In the above item 3, since the support plate for supporting the end portion of the mandrel from below is provided inside the side wall, the end portion of the mandrel in the roll body with a mandrel stored in the packing box can be supported by the support plate from below. Further, since the receiving recess is formed in the support plate, the end portion of the mandrel can be stably received from below.

[0020] In the above item 4, by pressing the end portion of the mandrel received by the receiving recess of the support plate with the pressing plate from above, the state in which the end portion of the mandrel is received by the receiving recess can be maintained. Further, when the pressing plate presses the end portion of the mandrel from above, by inserting the pressing plate into the insertion gap of the support plate, the state in which the end portion of the mandrel is received by the receiving recess can be firmly maintained. Moreover, since the insertion gap is formed in the middle portion in the thickness direction of the support plate, it is easy to insert the pressing plate.

[0021] In the above item 5, since a part of the side wall is a bent piece, the strength of the side wall is higher than that in the case where substantially the whole side wall is a bent piece.

[0022] In the above item 6, since the bent piece is provided only on one of the left and right side walls, the strength of the packing box is higher than that in the case where the bent pieces are provided on both the left and right side walls respectively.

[0023] In the above item 7, the roll body with a mandrel is stored in the packing box so that when the bent piece is bent outward with respect to the side wall, the opening hole of the mandrel is exposed to the outside from the opening window that is open upward. Therefore, for the same reason as in item 1 above, the operation of taking out the roll body with a mandrel from the packing box can be easily performed.

Brief Description of the Drawings

[0024]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Embodiments for Carrying Out the Invention

[0025] An embodiment of the present invention will be described below with reference to the drawings.

[0026] As shown in FIG. 1, a packing box 1 according to an embodiment of the present invention is a rectangular cardboard box for storing a roll body 20 with a mandrel as an object to be stored. The entire roll body 20 with a mandrel is stored (packed) in this packing box 1 and transported (including transportation) to a predetermined place such as a customer's place.

[0027] The roll body 20 with a mandrel is formed by winding a long sheet material in a roll shape around the middle part in the left - right direction of a hollow mandrel 21 that extends straight in the left - right direction. The end portions 21a of the mandrel 21 protrude from the central parts of the left and right end faces 20b of the roll body main body 20a formed by winding the sheet material in a roll shape, respectively.

[0028] The mandrel 21 is of a circular - tubular shape, and opening holes 21b, which are the end openings of the hollow part of the mandrel 21, are provided on the left and right end faces of the mandrel 21. The sheet material is made of a metal foil material (e.g., aluminum foil material), a packaging material (e.g., resin film material, metal laminate film material), etc. Specifically, as the packaging material, an exterior material for a battery (e.g., lithium - ion secondary battery) can be mentioned. The weight of the roll body 20 with a mandrel is, for example, in the range of about 30 kg to 50 kg.

[0029] As shown in the developed view in Fig. 7, the packing box 1 includes a rectangular bottom wall 2, a peripheral wall 4 that stands on the outer peripheral edge of the bottom wall 2 and surrounds the periphery of the roll body 20 with a mandrel, and a rectangular top wall 8. In Fig. 7, the broken line indicates a fold line.

[0030] The bottom wall 2 is composed of a pair of front - rear lower outer flaps 2C, 2D and a pair of left - right lower inner flaps 2A, 2B. When these lower flaps 2A - 2D are closed at the lower surface position of the packing box 1, the lower surface of the packing box 1 is blocked by these lower flaps 2A - 2D to form the bottom wall 2. Further, in order to prevent these lower flaps 2A - 2D from accidentally opening, these lower flaps 2A - 2D are held in a closed state by holding means (not shown) such as packing adhesive tape, staples, etc. Similarly, the top wall 8 is composed of a pair of front - rear upper outer flaps 8C, 8D and a pair of left - right upper inner flaps 8A, 8B. When these upper flaps 8A - 8D are closed at the upper surface position of the packing box 1, the upper surface of the packing box 1 is blocked by these upper flaps 8A - 8D to form the top wall 8.

[0031] The peripheral wall 4 includes a pair of front and rear front walls 4C and rear walls 4D that are erected via fold lines 4c and 4d at the front edge and rear edge of the bottom wall 2 and are arranged in parallel with each other at a distance, and a pair of left and right left side walls 4A and right side walls 4B that are erected via fold lines 4a and 4b at the left edge and right edge of the bottom wall 2 and are arranged in parallel with each other at a distance. And an adhesive piece 9 continuously provided via a fold line 4e at the side edge of the rear wall 4D is adhered to the side edge portion of the inner surface of the right side wall 4B.

[0032] As shown in FIG. 1, a part of one of the left and right side walls 4A and 4B is a bent piece 5 that can be bent outward, and such a bent piece is not provided on the other side wall. In the present embodiment, a part of the left side wall 4A of the both side walls 4A and 4B is the bent piece 5, and such a bent piece is not provided on the right side wall 4B.

[0033] The bent piece 5 is composed of a substantially rectangular part having a predetermined width that extends from approximately the middle part in the front-rear direction of the upper edge of the left side wall 4A to approximately the middle part in the vertical direction or the vicinity of the lower edge.

[0034] The lower edge of the bent piece 5 is integrally connected to the left side wall 4A via a fold line 5a, and a pair of front and rear vertical cut lines 5b, 5b extending downward from the upper edge of the left side wall 4A along both side edges in the width direction of the bent piece 5 are provided on the left side wall 4A. Further, a pair of horizontal cut lines 5c, 5c extending along the upper edge from both front and rear ends of the upper edge to the corresponding vertical cut lines 5b, 5b are provided on the upper edge of the left side wall 4A. Also, an upper left inner flap 8A for the top wall 8 is integrally connected via a fold line 5d to the upper edge of the bent piece 5 that is formed by the portion between the both horizontal cut lines 5c, 5c at the upper edge of the left side wall 4A.

[0035] Then, the packing box 1 is configured such that when the folding piece 5 is folded outward with respect to the left side wall 4A along the fold line 5a, an opening window 6 that opens upward is formed in a portion of the left side wall 4A before the folding piece 5 is folded. As shown in FIG. 3, the opening hole 21b at the left end portion 21a of the mandrel 21 in the roll body 20 with a mandrel stored in the packing box 1 is exposed to the outside through this opening window 6. In other words, the roll body 20 with a mandrel is stored in the packing box 1 such that the opening hole 21b at the left end portion 21a of the mandrel 21 is exposed to the outside through this opening window 6 when the folding piece 5 is folded outward with respect to the left side wall 4A.

[0036] Furthermore, the configuration of the packing box 1 will be described in detail as follows.

[0037] As shown in FIGS. 2 to 4, inside the left and right side walls 4A and 4B of the packing box 1, a pair of left and right corrugated support plates 10, 10 are respectively arranged upright on the bottom wall 2 in a state of being overlapped with the inner surfaces of the corresponding side walls 4A, 4B and with respect to the bottom wall 2. Each support plate 10 supports the corresponding end portion 21a of the mandrel 21 in the roll body 20 with a mandrel from below. These support plates 10, 10 have the same shape and the same structure as each other.

[0038] The upper edge of the support plate 10 is located at substantially the same height as the upper edge of the corresponding side walls 4A, 4B (see FIG. 4). Also, as shown in FIG. 1, in the middle portion in the front-rear direction of the support plate 10, a receiving recess 10b having a substantially U-shaped cross section that opens upward for receiving the end portion 21a of the mandrel 21 from below is provided. The receiving bottom portion of the receiving recess 10b is formed in a substantially arc-shaped cross section (specifically, a substantially semi-circular arc-shaped cross section) and is located at substantially the same height as the height of the lower edge (fold line 5a) of the folding piece 5 or at a slightly higher height. Furthermore, as shown in FIG. 2, the folding piece 5 and the receiving recess 10b of the left support plate 10 are formed such that the entire receiving recess 10b of the left support plate 10 is exposed to the outside through the opening window 6 in a state where the folding piece 5 is folded outward with respect to the left side wall 4A.

[0039] As shown in FIG. 8, the support plate 10 is manufactured by bending a single cardboard blank 10a so that an insertion gap 10c into which a pressing plate 12 described later is inserted is formed in the middle portion of the support plate 10 in the thickness direction.

[0040] As shown in FIG. 4, in a state where the end portion 21a of the mandrel 21 of the roll body 20 with a mandrel is received by the receiving recess 10b of the support plate 10 from below, that is, in a state where the end portion 21a of the mandrel 21 is supported by the support plate 10 from below, the roll body 20 (roll body main body 20a) is slightly separated upward from the bottom wall 2 and slightly separated downward from the top wall (see FIGS. 8 and 6), and the mandrel 21 is arranged to be substantially horizontal.

[0041] Furthermore, as shown in FIG. 5, the end portion 21a of the mandrel 21 received by the receiving recess 10b of each support plate 10 is pressed from above by the pressing plate 12, whereby the state where the end portion 21a of the mandrel 21 is received by the receiving recess 10b is maintained. The pressing plate 12 is made of cardboard having substantially the same thickness as the thickness of the cardboard which is the material of the above-described blank 10a of the support plate 10. These pressing plates 12, 12 have the same shape and the same structure as each other.

[0042] As shown in FIG. 3, a pressing recess 12a formed by a notch having a circular arc-shaped cross section (more specifically, a semi-circular arc-shaped cross section) is provided in the middle portion in the front-rear direction of the lower edge of the pressing plate 12. In a state where the end portion 21a of the mandrel 21 is pressed by the pressing plate 12 from above, substantially the upper half portion of the end portion 21a of the mandrel 21 is disposed inside the pressing recess 12a.

[0043] Also, as shown in FIG. 4, in the middle portion of the support plate 10 in the thickness direction, the above-described insertion gap 10c into which the pressing plate 12 is inserted when pressing the end portion 21a of the mandrel 21 from above is formed to be open upward. In a state where the pressing plate 12 presses the end portion 21a of the mandrel 21 from above, the pressing plate 12 (more specifically, both side edge portions 12b, 12b of the pressing plate 12) is inserted into the insertion gap 10c from above. Further, in this state, as shown in FIG. 5, the upper edge of the pressing plate 12 is located at substantially the same height as the upper edge of the support plate 10.

[0044] Next, the storage procedure of the roll body 20 with a core rod into the packing box 1 of the present embodiment will be described below.

[0045] As shown in FIG. 2, when the upper flaps 8A to 8D of the top wall 8 of the packing box 1 are opened to open the top surface of the packing box 1 upward, the folding piece 5 is folded outward with respect to the left side wall 4A along the folding line 5a. As a result, the upper left inner flap 8A is also moved outward integrally with the folding piece 5, and an opening window 6 that is opened upward in the left side wall 4A is formed, and the entire receiving recess 10b of the left support plate 10 is exposed to the outside from the opening window 6. Further, a rod member 30 that can be driven vertically at least in a horizontal state by the driving force of a driving device such as an actuator is horizontally inserted into the opening hole 21b of the core rod 21 of the roll body 20 with a core rod from the side and lifted, so that the roll body 20 with a core rod is lifted by the rod member 30 so that its left-right direction is substantially horizontal, and the roll body 20 with a core rod is arranged above the packing box 1 so that the front-back, left-right directions of the roll body 20 with a core rod coincide with the front-back, left-right directions of the packing box 1. The rod member 30 is composed of, for example, an industrial robot arm.

[0046] Next, the rod member 30 is lowered so that the rod member 30 moves downward from the upper side of the opening window 6 to the inside of the opening window 6, thereby moving the roll body 20 with a core rod from the upper side of the packing box 1 to the inside of the packing box 1. Then, when the roll body 20 with a core rod enters the packing box 1 and each end portion 21a of the core rod 21 is received by the corresponding receiving recess 10b of the support plate 10 from below (that is, when each end portion 21a of the core rod 21 is supported by the corresponding support plate 10 from below), the rod member 30 is pulled out from the opening hole 21b of the core rod 21. As a result, as shown in FIGS. 3 and 4, the roll body 20 with a core rod is stored in the packing box 1.

[0047] Then, by inserting the corresponding pressing plate 12 downward into the insertion gap 10c of the support plate 10 from above the upper side of each end portion 21a of the mandrel 21, the end portion 21a of the mandrel 21 is pressed by the pressing plate 12 from above. As a result, as shown in FIG. 5, the end portion 21a of the mandrel 21 is sandwiched between the receiving concave portion 10b of the support plate 10 and the pressing concave portion 12a of the pressing plate 12, and the state in which the end portion 21a of the mandrel 21 is received by the receiving concave portion 10b is firmly held.

[0048] Next, by returning the bent piece 5 from the outside of the left side wall 4A to the position before bending the bent piece 5 with respect to the left side wall 4A, the opening window 6 is closed by the bent piece 5, and the upper left inner flap 8A is horizontally bent inward with respect to the left side wall 4A along the fold line 5d to close the upper left inner flap 8A at the upper surface position of the packing box 1. Also, the upper right inner flap 8B is closed at the upper surface position of the packing box 1, and the front and rear upper outer flaps 8C, 8D are closed at the upper surface position of the packing box 1. As a result, as shown in FIG. 6, the upper surface of the packing box 1 is closed by these upper flaps 8A to 8D, and the top wall 8 is formed.

[0049] Next, in order to prevent these upper flaps 8A to 8D from being accidentally opened, they are held in a closed state by holding means (not shown) such as packing adhesive tape, staples, etc. That is, when using, for example, an adhesive tape (not shown) as the holding means, the adhesive tape is adhered along the closing portion 8a to the outer surface of the closing portion 8a of the front and rear upper outer flaps 8C, 8D, thereby holding these upper flaps 8A to 8D in a closed state.

[0050] The package 1A in which the roll body 20 with a mandrel is stored in the packing box 1 by the above storage procedure is transported to a predetermined place such as the customer's place.

[0051] The operation of taking out the roll body 20 with a mandrel stored in the packing box 1 from the packing box 1 is performed in the reverse procedure of the storage procedure of the roll body 20 with a mandrel described above. The taking-out procedure of the roll body 20 with a mandrel will be briefly described as follows.

[0052] That is, open the front, rear, upper, outer flaps 8C and 8D of the packing box 1, and open the left and right upper inner flaps 8A and 8B. Then, move the left upper inner flap 8A to the outside of the left side wall 4A integrally with the folding piece 5 so that the folding piece 5 of the left upper inner flap 8A is folded outward with respect to the left side wall 4A along the folding line 5a. As a result, an opening window 6 is formed in the left side wall 4A, and the opening hole 21b of the mandrel 21 received in the receiving recess 10b of the left support plate 10 is exposed to the outside through the opening window 6 (see FIG. 3).

[0053] Next, pull out the both pressing plates 12, 12 upward from the insertion gaps 10c of the corresponding support plates 10, and horizontally insert the rod member 30 into the opening hole 21b of the mandrel 21 from the side and move it upward. Thereby, the roll body 20 with a mandrel is lifted horizontally by the rod member 30 and taken out from the packing box 1.

[0054] The packing box 1 of the present embodiment has the following advantages.

[0055] By opening the upper flaps 8A to 8D of the packing box 1 to open the upper surface of the packing box 1 and folding the folding piece 5 of the left side wall 4A outward with respect to the left side wall 4A, the opening hole 21b of the mandrel 21 is exposed from the upwardly opened opening window 6. Therefore, when taking out the roll body 20 with a mandrel from the packing box 1, by horizontally inserting the rod member 30 into the opening hole 21b of the mandrel 21 exposed from the opening window 6 from the side and moving it upward, the roll body 20 with a mandrel is taken out from the packing box 1. Therefore, the operation of taking out the roll body 20 with a mandrel from the packing box 1 can be easily performed.

[0056] When storing the roll body 20 with a mandrel in the packing box 1, the rod member 30 is horizontally inserted into the opening hole 21b of the mandrel 21 from the side and lifted, thereby lifting the roll body 20 with a mandrel. At the same time, the bending piece 5 is bent outward with respect to the left side wall 4A to form an opening window 6 that is open upward in the left side wall 4A. In this state, the rod member 30 is lowered so that the rod member 30 moves downward from the upper side of the opening window 6 to the inside of the opening window 6 (inside the receiving recess 10b of the support plate 10), thereby moving the roll body 20 with a mandrel from the upper side of the packing box 1 to the inside of the packing box 1 and storing the roll body 20 with a mandrel in the packing box 1. By doing so, the operation of storing the roll body 20 with a mandrel in the packing box 1 can also be easily performed.

[0057] Furthermore, since the upper left inner flap 8A is integrally provided at the upper edge of the bending piece 5, in the state where the bending piece 5 is bent outward with respect to the left side wall 4A, the upper left inner flap 8A also moves outward with respect to the side wall 4A integrally with the bending piece 5. Therefore, it is possible to prevent the rod member 30 inserted into the opening hole 21b of the mandrel 21 and the roll body 20 with a mandrel from interfering with the upper left inner flap 8A during the storage operation and the taking-out operation of the roll body 20 with a mandrel. Therefore, the storage operation and the taking-out operation of the roll body 20 with a mandrel can be surely and easily performed.

[0058] Furthermore, since the support plates 10 for supporting the corresponding end portions 21a of the mandrel 21 from below are provided inside the left and right side walls 4A, 4B, the end portions 21a of the mandrel 21 in the roll body 20 with a mandrel stored in the packing box 1 can be supported by the support plates 10 from below. Furthermore, since the receiving recesses 10b are formed in the support plates 10, the end portions 21a of the mandrel 21 can be stably received from below. Moreover, since the receiving recesses 10b are open upward, the end portions 21a of the mandrel 21 can be received by the receiving recesses 10b due to the downward movement of the rod member 30, and the roll body 20 with a mandrel can be taken out from the packing box 1 in the state where the end portions 21a of the mandrel 21 are received by the receiving recesses 10b.

[0059] Furthermore, by pressing the end portion 21a of the mandrel 21 received in the receiving recess 10b of the support plate 10 from above with the pressing plate 12, the state in which the end portion 21a of the mandrel 21 is received in the receiving recess 10b can be maintained. Further, when the pressing plate 12 presses the end portion 21a of the mandrel 21 from above, by inserting the pressing plate 12 into the insertion gap 10c of the support plate 10, the state in which the end portion 21a of the mandrel 21 is received in the receiving recess 10b can be firmly maintained.

[0060] Here, as shown in FIG. 4, when pressing the end portion 21a of the mandrel 21 from above with the pressing plate 12, it is conceivable to insert the pressing plate 12 into the gap 14 between the support plate 10 and the end face 20b of the roll body main body 20a instead of the insertion gap 10c of the support plate 10. However, in this case, since the end portion 21a of the mandrel 21 may be received in the receiving recess 10b in a state where the position of the end face 20b of the roll body main body 20a is slightly shifted in the left-right direction with respect to the predetermined position, the width of the gap 14 is not constant but slightly changes. Therefore, when the width of the gap 14 is narrow, it becomes difficult to insert the pressing plate 12 into the gap 14. On the other hand, in the present embodiment, the width of the insertion gap 10c of the support plate 10 does not change even when the position of the end face 20b of the roll body main body 20a is slightly shifted in the left-right direction with respect to the predetermined position, so it is easy to insert the pressing plate 12 into the insertion gap 10c.

[0061] Also, in the package 1A in which the roll body 20 with mandrel is stored in the packaging box 1, the roll body 20 with mandrel is stored in the packaging box 1 so that the opening hole 21b of the mandrel 21 is exposed to the outside from the opening window 6 opened upward when the bent piece 5 is bent outward with respect to the left side wall 4A. Therefore, for the reasons described above, the work of taking out the roll body 20 with mandrel from the packaging box 1 can be easily performed.

[0062] Here, in the present invention, substantially the entire left side wall 4A may be the bent piece 5. However, it is preferable that a part of the left side wall 4A is the bent piece 5 as in the present embodiment. In this case, there is an advantage that the strength of the left side wall 4A is higher than that of the packaging box in which substantially the entire left side wall 4A is the bent piece 5.

[0063] In the present invention, the bent pieces 5 may be provided on each of the left and right side walls 4A and 4B. However, it is preferable that the bent pieces 5 are provided only on one of the side walls (that is, the left side wall 4A or the right side wall 4B) of the both side walls 4A and 4B as in this embodiment. In this case, there is an advantage that the strength of the packing box 1 is higher than that of the packing box in which the bent pieces are provided on the left and right side walls 4A and 4B respectively.

[0064] Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the gist of the present invention.

Industrial Applicability

[0065] The present invention can be used for a packing box for storing a roll body with a mandrel, and a package in which the roll body with a mandrel is stored in the packing box.

Explanation of Reference Numerals

[0066] 1: Packing box 2: Bottom wall 4A: Left side wall 5: Bent piece 6: Opening window 8A: Upper left inner flap 10: Support plate 10b: Receiving recess 10c: Insertion gap 12: Pressing plate 20: Roll body with mandrel 21: Mandrel 21a: End portion of mandrel 21b: Opening hole of mandrel

Claims

1. A packing box for storing a roll body with a mandrel, in which a sheet material is wound in a roll shape around a hollow mandrel extending in the left - right direction and having an opening hole provided in an end surface, where at least one of the left and right side walls has at least a part of the side wall formed as a bending piece that can be bent outward, and when the bending piece is bent outward with respect to the side wall, an opening window is formed in a portion of the side wall before bending of the bending piece, such that the opening hole of the mandrel of the roll body with a mandrel is exposed to the outside and opened upward. A packing box configured as such.

2. The packing box according to claim 1, wherein an upper inner flap is integrally connected to the upper edge of the bending piece.

3. The packing box according to claim 1 or 2, wherein a support plate for supporting an end portion of the mandrel from below is provided inside the side wall, and an upward - opening receiving recess for receiving the end portion of the mandrel from below is formed in the support plate.

4. The packing box according to claim 3, further comprising a pressing plate for pressing the end portion of the mandrel received in the receiving recess of the support plate from above, and an insertion gap is formed in an intermediate portion in the thickness direction of the support plate, into which the pressing plate is inserted when pressing the end portion of the mandrel from above.

5. The packing box according to claim 1 or 2, wherein a part of the side wall is the bending piece.

6. The packing box according to claim 1 or 2, wherein the bending piece is provided only on one of the left and right side walls.

7. A package in which a roll body with a mandrel, in which a sheet material is wound in a roll shape around a hollow mandrel extending in the left - right direction and having an opening hole provided in an end surface, is stored in a packing box, where at least one of the left and right side walls of the packing box has at least a part of the side wall formed as a bending piece that can be bent outward, the packing box is configured such that when the bending piece is bent outward, an upward - opening opening window is formed in a portion of the side wall before bending of the bending piece, and the roll body with a mandrel is stored in the packing box such that when the bending piece is bent outward, the opening hole of the mandrel is exposed to the outside from the opening window.

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