JP2017043368A - Cushioning material and blank of cushioning material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cushioning material which has excellent productivity and which securely maintains an assembled state.SOLUTION: A cushioning material 10 includes: a first end wall 12A; a second end wall 12B; a first laminated wall 15A; and a second laminated wall 15B. The laminated walls 15A and 15B has substrate parts 18A and 18B, and folding-back boards 19A and 19B, and are continuous on a boundary line side of the first end wall 12A and the second end wall 12B via bending lines 20A and 20B. On the first laminated wall 15A, a first engaging protrusion part 26A is provided on the substrate part 18A, whereas a first engaging recess part 27A is provided on the first folding-back board 19A. On the second laminated wall 15B, a second engaging protrusion part 26B is provided on the second folding-back board 19B, whereas a second engaging recess part 27B is provided on the second substrate part 18B. The first engaging protrusion part 26A of the first laminated wall 15A is engaged with the second engaging recess part 27B of the second laminated wall 15B, and the second engaging protrusion part 26B of the second laminated wall 15B is engaged with the first engaging recess part 27A of the first laminated wall 15A.SELECTED DRAWING: Figure 2B

Description

  The present invention relates to a cushioning material and a blank of the cushioning material.

  When packing an article in a packaging box, a cushioning material including a corner pad disposed at a corner of the article is used. A pulp mold cushioning material not only has a high production cost, but also requires a large space for storage. Patent Documents 1 and 2 disclose cardboard corner pads that are inexpensive and can reduce storage space.

  The corner pad of Patent Document 1 includes a first end wall and a second end wall that are bent in an orthogonal direction. A first laminated wall is provided on one end side of the first end wall, and a second laminated wall is provided on one end side of the second end wall. These laminated walls are each formed in a right isosceles triangle shape. The first laminated wall is provided with a pair of engaging convex portions, and the second laminated wall is provided with a pair of engaging concave portions. The corner pad is held in the assembled state by engaging the engaging convex portion of the first laminated wall with the engaging concave portion of the second laminated wall.

  Similarly to Patent Document 1, the corner pad of Patent Document 2 includes a first end wall, a second end wall, a first laminated wall, and a second laminated wall. The first laminated wall includes a first substrate portion that is continuous with the first end wall, and a first folded plate portion that is continuous with the first substrate portion. Similarly, the second laminated wall includes a second substrate portion that is continuous with the second end wall, and a second folded plate portion that is continuous with the second substrate portion. The first laminated wall is provided with a first engaging convex portion that protrudes toward the second laminated wall side on the first substrate portion, and a first engaging concave portion is provided on the first folded plate portion. The second laminated wall is provided with a second engagement convex portion having a shape corresponding to the first engagement concave portion in the second folded plate portion, and corresponds to the first engagement convex portion in the second substrate portion. A second engaging recess having a shape is provided. The first engaging convex portion of the first laminated wall is engaged with the second engaging concave portion of the second laminated wall, and the second engaging convex portion of the second laminated wall is engaged with the first engaging concave portion of the first laminated wall. By engaging, the corner pad is held in the assembled state.

JP-A-8-198334 Registered Utility Model No. 3188913

  However, when the first laminated wall and the second laminated wall are misaligned in the thickness direction, the corner pad of Patent Document 1 is easily detached from the article because the engagement convex portion and the engagement concave portion are easily disengaged. There is a fear. On the other hand, in the corner pad of Patent Document 2, since the engaging convex portion and the engaging concave portion are engaged with each other on both surfaces of the laminated wall, the engagement can be prevented from being released and the assembled state can be maintained. . However, the structure of the punching device must be formed by positioning the engaging convex portion and the engaging concave portion and separating the corrugated cardboard sheet (punching waste) around the engaging convex portion and in the engaging concave portion. Becomes complicated. If the positioning is insufficient, the edge of the engaging convex part and the edge of the engaging concave part are torn or missing, so that the manufacture is difficult and the yield deteriorates.

  An object of the present invention is to provide a cushioning material that has good productivity and can reliably maintain an assembled state.

  The present invention includes a first end wall, a second end wall that is bent with respect to the first end wall, and a first edge of the first end wall, and is continuous with the first end wall. A first laminated wall bent and a second edge of the second end wall located along the first edge, the first laminated wall with respect to the second end wall A second laminated wall that is bent in the same direction as the first laminated wall, the first laminated wall being located on the first edge side of the first end wall, and the first substrate part. A first folded plate portion disposed in an overlapping manner, and the first substrate portion and the first folded plate portion are bent along a first folding line on a side facing the second laminated wall. The second laminated wall includes a second substrate portion positioned on the second edge side of the second end wall, and a second folded plate portion disposed to overlap the second substrate portion. The second substrate portion and the second folded plate portion are bent along a second folding line on a side facing the first laminated wall, and the first laminated wall is formed on the first substrate portion. A first engaging convex portion protruding from the first folding line to the second laminated wall side is provided, and the first folding plate portion is provided with the first folding curve as the starting point. A first engagement recess is provided in a shape complementary to the engagement protrusion and is closed on the first substrate portion side, and the second laminated wall is provided with the second folded plate portion on the second laminated wall. A second engaging convex portion having the same shape as the first engaging concave portion protruding from the folding line to the first laminated wall side is provided, and the second folding curve is provided on the second substrate portion. A second engagement recess is provided that has a shape that is complementary to the second engagement protrusion as a starting point and is closed on the second folded plate portion side. The first engaging convex portion is engaged with the second engaging concave portion of the second laminated wall, and the second engaging convex portion of the second laminated wall is the first of the first laminated wall. A cushioning material is provided that is engaged with one engaging recess.

  Here, the first substrate portion located on the first edge side of the first end wall is a configuration in which the first substrate portion is continuous with the first edge of the first end wall, and the first substrate portion is the first. The structure which is continuing to the 1st edge of the 1st end wall via the other board part except a folding | turning board part is meant. Similarly, the second substrate portion located on the second edge side of the second end wall is a configuration in which the second substrate portion is continuous with the second edge of the second end wall, and the second substrate portion is second. The structure which is continuing to the 1st edge of the 2nd end wall via the other board part except a folding | turning board part is meant.

  In this buffer material, in the thickness direction of each laminated wall, the first engaging convex portion of the first laminated wall engages with the second engaging concave portion of the second laminated wall from one side, and The two engaging convex portions are engaged with the first engaging concave portion of the first laminated wall from the other side. Therefore, even if the first laminated wall and the second laminated wall are misaligned in the thickness direction, it is possible to suppress the disengagement between the respective engaging convex portions and the engaging concave portions, and the assembly state can be surely achieved. Can be maintained.

  The first laminated wall includes a first reinforcing plate portion that is arranged to overlap at least one of the first substrate portion and the first folded plate portion, and the second laminated wall includes the second substrate portion. And a second reinforcing plate portion superimposed on at least one of the second folded plate portions. According to this aspect, the buffer performance of the first laminated wall and the second laminated wall can be improved. One reinforcing plate portion or two or more reinforcing plate portions may be provided. Moreover, the part which arrange | positions a reinforcement board part may be between a board | substrate part and a folding | turning board part, the opposite side to the folding | turning board part of a board | substrate part may be sufficient, and the opposite side to the board | substrate part of a folding | turning plate part may be sufficient.

  The blank of the cushioning material includes a first end wall, a second end wall continuous with the first end wall, a first laminated wall continuous with a first edge of the first end wall, A second laminated wall continuing to the second edge of the second end wall extending along the first edge, and the first laminated wall is connected to the first edge side of the first end wall. A first folded portion connected to the first substrate portion via a first substrate portion provided and a first folding curve extending obliquely with respect to the first edge of the first end wall. A second base plate portion connected to the second edge side of the second end wall, and the second laminated wall inclined with respect to the second edge of the second end wall. And a second folded plate portion that is continuous with the second substrate portion via a second folding line extending, and the first laminated wall has the first folding curve as a starting point. Detour to the first folded plate The first cutting line is provided, and the first cutting line is provided with a first engaging convex part continuous with the first substrate part, and the first folding plate part has a first engaging concave part. The second laminated wall is provided with a second cutting line that detours toward the second substrate portion starting from the second folding line, and the second cutting line causes the second cutting line to A second engagement convex portion continuous to the two folded plate portions is provided, and a second engagement concave portion is provided in the second substrate portion.

  When assembling the cushioning material with this blank, for example, the first folded plate portion is bent with respect to the first substrate portion along the first folding line, and the second substrate portion along the second folding curve. Bend the second folded plate part. Thereby, while a 1st engagement convex part protrudes from a 1st board | substrate part, a 1st engagement recessed part is formed in a 1st folding | turning board part. In addition, the second engagement convex portion protrudes from the second folded plate portion, and the second engagement concave portion is formed in the second substrate portion. Next, the first laminated wall in which the first substrate portion and the first folded plate portion are overlapped is bent with respect to the first end wall, and the second laminated portion in which the second substrate portion and the second folded plate portion are overlapped. The wall is bent in the same direction as the first laminated wall with respect to the second end wall. Thereafter, the second end wall is bent with respect to the first end wall so that the first laminated wall and the second laminated wall are close to each other. The first engaging convex portion of the first laminated wall is engaged with the second engaging concave portion of the second laminated wall, and the second engaging convex portion of the second laminated wall is engaged with the first engagement of the first laminated wall. Engage with the mating recess.

  In this blank, by providing a first cutting line on the first folding plate portion side with the first folding curve as a starting point, a first engagement convex portion that is continuous with the first substrate portion is formed, and the first folding is performed. A first engaging recess is formed in the plate portion. Further, by providing a second cutting line on the second substrate portion side with the second folding line as a starting point, a second engagement convex portion continuous with the second folding plate portion is formed, and the second substrate portion A second engaging recess is formed. That is, when forming the engaging convex portion and the engaging concave portion, it is not necessary to drop out the periphery of the engaging convex portion and the portion in the engaging concave portion only by inserting a blade and providing a cutting line. Therefore, it is not necessary to provide a complicated positioning mechanism when forming the blank, and neither the edge of the engaging convex part nor the edge of the engaging concave part is broken or broken. Therefore, the productivity of the blank is good and the yield can be improved.

  In the cushioning material of the present invention, since the engaging convex portion of each laminated wall is engaged with the engaging concave portion of the other laminated wall, the first laminated wall and the second laminated wall are displaced in the thickness direction. However, it is possible to suppress the engagement between the engagement convex portion and the engagement concave portion, and the assembly state can be reliably maintained. In addition, since the cushioning material blank does not need to be removed from the periphery of the engaging convex part and the part in the engaging concave part, the productivity is good and the yield can be improved.

The upper perspective view of the shock absorbing material of a 1st embodiment. The lower perspective view of FIG. The top view of FIG. FIG. 2B is a sectional view taken along line AA in FIG. 2A. The top view which shows the blank of the shock absorbing material of 1st Embodiment. Sectional drawing of the cardboard sheet | seat which forms a buffer material. Sectional drawing of the other corrugated cardboard sheet | seat which forms a buffer material. The perspective view which shows the assembly process of the shock absorbing material of 1st Embodiment. The upper perspective view of the shock absorbing material of 2nd Embodiment. The center cross-sectional view of FIG. 5A. The top view which shows the blank of the shock absorbing material of 2nd Embodiment. The perspective view which shows the assembly process of the shock absorbing material of 2nd Embodiment. The perspective view which shows the other assembly process of the shock absorbing material of 2nd Embodiment. The upper perspective view of the buffer material of 3rd Embodiment. FIG. 8B is a central cross-sectional view of FIG. 8A. The top view which shows the blank of the buffer material of 3rd Embodiment. The perspective view which shows the assembly process of the shock absorbing material of 3rd Embodiment. The lower perspective view of the shock absorbing material of 4th Embodiment. FIG. 11B is a central cross-sectional view of FIG. 11A. The top view which shows the blank of the shock absorbing material of 4th Embodiment. The perspective view which shows the assembly process of the shock absorbing material of 4th Embodiment. The top view which shows the blank of the shock absorbing material of 5th Embodiment. The perspective view which shows the assembly process of the shock absorbing material of 5th Embodiment. The upper perspective view of the shock absorbing material of 6th Embodiment. The top view which shows the blank of the buffer material of 6th Embodiment. The perspective view which shows the assembly process of the shock absorbing material of 6th Embodiment. The upper perspective view of the shock absorbing material of 7th Embodiment. The top view which shows the blank of the cushioning material of 7th Embodiment. The top view which shows the modification of a buffer material. The top view which shows the other modification of a buffer material.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, terms indicating specific directions and positions (for example, terms including “up”, “down”, “right”, “left”) are used as necessary. Is for facilitating understanding of the invention with reference to the drawings, and the technical scope of the present invention is not limited by the meaning of these terms.

(First embodiment)
1A to 4 show a cushioning material 10 according to the first embodiment. As shown in FIGS. 1A to 2B, the cushioning material 10 is provided on the first end wall 12A, the second end wall 12B continuous to the first end wall 12A, and one end side of these end walls 12A and 12B. A third end wall 12C. Among them, the third end wall 12C includes a first laminated wall 15A continuous to the first end wall 12A and a second laminated wall 15B continuous to the second end wall 12B. In the cushioning material 10, for example, the first end wall 12A is arranged on the first side surface of the article, the second end wall 12B is arranged on the second side surface of the article adjacent to the first side surface, and the third end wall 12C. Is a corner pad disposed on the end face of the article.

  The cushioning material 10 is formed by punching a paper corrugated cardboard sheet as a single blank shown in FIG. 3A using a well-known paper punching apparatus and bending a predetermined portion. As shown in FIG. 3B, the general-purpose corrugated cardboard sheet 1 </ b> A includes a flat front liner 2, a flat back liner 3 disposed at a distance from the front liner 2, and between the front liner 2 and the back liner 3. And wavy central shin 5 arranged on the surface. Moreover, you may form the buffer material 10 using the double-sided cardboard sheet | seat 1B shown to FIG. 3C. The double-sided cardboard sheet 1 </ b> B further includes a middle liner 4 between the front liner 2 and the back liner 3. Between the front liner 2 and the middle liner 4, and between the back liner 3 and the middle liner 4, middle shins 5 are respectively arranged. The double-sided cardboard sheet 1B is thicker and has higher pressure resistance than the general-purpose cardboard sheet 1A.

  As shown in FIGS. 1A to 2B, the first end wall 12A and the second end wall 12B are flat rectangular plates, respectively, and are bent so as to be positioned at an interval of 90 degrees from each other. Referring to FIG. 3A, the second end wall 12B is connected to the right edge of the first end wall 12A via a folding line 13. The folding line 13 is a boundary line between the first end wall 12A and the second end wall 12B. In the present embodiment, the folding line 13 is constituted by a lead rule with good bendability. The lead ruler is a general-purpose ruled line (shown by a one-dot chain line in FIG. 3A) in which the thickness of the corrugated cardboard sheet is reduced by inserting a ruled line, and a blade is inserted along the general-purpose ruled line to cut the cardboard sheet. And a cutting portion (shown by a solid line in FIG. 3A).

  As most clearly shown in FIG. 1B, the first laminated wall 15A constituting the third end wall 12C is bent with respect to the first end wall 12A so as to extend along the direction in which the second end wall 12B extends. ing. Referring to FIG. 3A, the first laminated wall 15A is connected to the lower edge (first edge) of the first end wall 12A extending in the direction orthogonal to the folding line 13 via the folding line 16A. . The second laminated wall 15B constituting the third end wall 12C is bent with respect to the second end wall 12B so as to extend along the direction in which the first end wall 12A extends. Referring to FIG. 3A, the second laminated wall 15B has a second end wall 12B located on a straight line (on the same plane in FIG. 1B) along a folding line 16A that is the lower edge of the first end wall 12A. Is connected to the lower edge (second edge) via a folding line 16B. The folding lines 16A and 16B are composed of lead rules similar to the folding line 13.

  As shown in FIGS. 1A to 2B, each of the laminated walls 15A and 15B includes a substrate portion 18A and 18B and a folded plate portion 19A and 19B, and is a laminated structure in which these are overlapped. The laminated walls 15A and 15B are provided with engaging convex portions 26A and 26B and engaging concave portions 27A and 27B, respectively. The assembled state of the cushioning material 10 is maintained by engaging the engaging convex portions 26A and 26B and the engaging concave portions 27A and 27B with each other.

  Specifically, the first laminated wall 15A is disposed so as to overlap the upper surface of the first substrate portion 18A and the first substrate portion 18A located on the folding line 16A side that is the first edge of the first end wall 12A. And a first folded plate portion 19A. The first substrate portion 18A and the first folded plate portion 19A are connected via a folding line (first folding line) 20A on the folding line 13 side that is a boundary line between the first end wall 12A and the second end wall 12B. It is installed. Referring to FIG. 3A, the first substrate portion 18A has a right-angled isosceles triangle shape, and is connected to the lower edge of the first end wall 12A via a folding line 16A. The first folded plate portion 19A has a right-angled isosceles triangle shape that is substantially line-symmetric with respect to the first substrate portion 18A, and passes through a folding line 20A that extends at an angle of 45 degrees with respect to the folding line 16A. Are connected to the oblique sides of the first substrate portion 18A. The first folded plate portion 19A is connected to the first end wall 12A via the first substrate portion 18A.

  The second laminated wall 15B has a second substrate portion 18B located on the side of the folding line 16B, which is the second edge of the second end wall 12B, and a second folded portion that is superimposed on the upper surface of the second substrate portion 18B. And a plate portion 19B. These 2nd board | substrate parts 18B and the 2nd folding | turning board part 19B are connected by the folding line 13 side via the folding line (2nd folding line) 20B. The fold line 20B and the fold line 20B are opposed portions of the first laminated wall 15A and the second laminated wall 15B. Referring to FIG. 3A, the second substrate portion 18B has a right-angled isosceles triangle shape, and is connected to the lower edge of the second end wall 12B via a folding line 16B. The second folded plate portion 19B has a right-angled isosceles triangle shape that is generally line symmetric with respect to the second substrate portion 18B, and passes through a folding line 20B that extends at an angle of 45 degrees with respect to the folding line 16B. And connected to the oblique side of the second substrate portion 18B. The second folded plate portion 19B is connected to the second end wall 12B via the second substrate portion 18B.

  As shown in FIG. 3A, the folded plate portions 19A and 19B of the present embodiment are connected to the inside of the substrate portions 18A and 18B via folding lines 20A and 20B so as to be positioned adjacent to each other. The folding lines 20A and 20B are inclined and extended outward so that the interval gradually increases from the lower end of the folding line 13. These fold lines 20A and 20B include a bridge portion 21 that connects the substrate portions 18A and 18B and the folded plate portions 19A and 19B, and a cut portion 24 that is a cut portion except for the bridge portion 21 and the engaging convex portions 26A and 26B. I have.

  A pair of bridge portions 21 are provided so as to be located on both sides of the engaging convex portions 26A and 26B. The bridge portion 21 includes a pair of cutting lines 22 and 22 extending in an orthogonal direction so as to intersect the cutting portion 24, and a pair of folding lines 23 extending from one of the cutting lines 22 and 22 to the other. The folding line 23 is provided in the vicinity of the end portions of the cutting lines 22, 22 and extends in parallel with the cutting portion 24.

  The cutting part 24 includes a first part extending from the lower end of the folding line 13 to the one bridge part 21 and a second part extending from the one bridge part 21 to the engaging convex parts 26A and 26B. Moreover, the cutting | disconnection part 24 is provided with the 3rd part extended from the engagement convex part 26A, 26B to the other bridge | bridging part 21, and the 4th part extended from the other bridge | bridging part 21 to the outer edge of a blank.

  As shown in FIGS. 1A and 1B, the first laminated wall 15A is provided with a first engagement convex portion 26A on the first substrate portion 18A, and a first engagement concave portion 27A on the first folded plate portion 19A. Is provided. In the second laminated wall 15B, a second engagement convex portion 26B is provided on the second folded plate portion 19B, and a second engagement concave portion 27B is provided on the second substrate portion 18B.

  The first engaging convex portion 26A protrudes from the first substrate portion 18A to the second laminated wall 15B side with the folding line 20A as a starting point. The second engaging convex portion 26B protrudes from the second folded plate portion 19B toward the first laminated wall 15A side with the folding line 20B as a starting point. These engagement convex portions 26A and 26B have the same shape, and are formed in a generally inverted triangular shape that spreads from the proximal end side toward the distal end side.

  The first engaging recess 27A is provided in the first folded plate portion 19A starting from the folding line 20A. The first engaging recess 27A has a shape complementary to the shape of the first engaging convex portion 26A and the second engaging convex portion 26B. With reference to FIGS. 2A and 2B, one end (lower end) side is the first end. One substrate part 18A is plugged. The second engaging recess 27B is provided in the second substrate portion 18B with the folding line 20B as a starting point. The second engagement concave portion 27B has a shape that complements the shape of the first engagement convex portion 26A and the second engagement convex portion 26B. With reference to FIGS. 2A and 2B, one end (upper end) side is the first end. It is blocked by two folded plate portions 19B. The laminated walls 15A and 15B are the same member made of a single blank, but hatching extending in a different direction is provided in FIG. 2B so that the first laminated wall 15A and the second buffer wall B can be clearly distinguished. It is attached.

  As shown in FIG. 3A, the first laminated wall 15A is provided with a cutting line (first cutting line) 28A that detours from the folding line 20A to the first folded plate part 19A side. The second laminated wall 15B is provided with a cutting line (second cutting line) 28B that detours toward the second substrate portion 18B from the folding line 20B. These cutting lines 28A and 28B are provided with a pair of first cutting portions 29 and 29 that are inclined from the end portions of the pair of cutting portions 24 and 24 that are positioned at an interval so that the distance between them gradually increases. . The cutting lines 28 </ b> A and 28 </ b> B include a second cutting portion 30 that extends in parallel with the cutting portion 24 from one tip to the other tip of the pair of first cutting portions 29 and 29.

  In the first laminated wall 15A, a cutting line 28A is provided in the first folded plate portion 19A, whereby a first engaging convex portion 26A continuous with the first substrate portion 18A is defined in the cutting line 28A. Further, the first folded plate portion 19A is defined with a first engaging recess 27A by a cutting edge of the cutting line 28A. In the second laminated wall 15B, a cutting line 28B is provided in the second substrate portion 18B, whereby a second engaging convex portion 26B continuous with the second folded plate portion 19B is defined in the cutting line 28B. The second substrate portion 18B has a second engagement recess 27B defined by a cutting edge of the cutting line 28B.

  As shown in FIG. 1A, the first end wall 12A is provided with a rectangular first lock hole 32A, and the second end wall 12B is provided with a rectangular second lock hole 32B. . The first folded plate portion 19A is provided with a rectangular first lock portion 33A that engages with the first lock hole 32A, and the second folded plate portion 19B has a second lock hole 32B. A rectangular second lock portion 33B to be locked is projected. As shown in FIG. 3A, the lock holes 32A and 32B are formed by partially punching the end walls 12A and 12B so as to be positioned along the folding lines 16A and 16B. Lock part 33A, 33B protrudes from the mutually opposing edge of the folding | returning board part 19A, 19B arrange | positioned adjacently. The lock portions 33A and 33B are formed by providing a cutting line 34 located on an extension line of the folding line 13 at a partial connecting portion provided between the folded plate portions 19A and 19B.

  Next, an example of a procedure for assembling the blank shown in FIG. 3A as the cushioning material 10 shown in FIG. 1A will be described.

  First, as shown in FIG. 4, the first folding plate portion 19A is folded with respect to the first substrate portion 18A along the folding line 20A, and the second folding is performed with respect to the second substrate portion 18B along the folding line 20B. The plate portion 19B is bent. Thereby, the first engagement convex portion 26A protrudes from the first substrate portion 18A, and the first engagement concave portion 27A is formed in the first folded plate portion 19A. Further, the second engagement convex portion 26B protrudes from the second folded plate portion 19B, and the second engagement concave portion 27B is formed in the second substrate portion 18B. The first engagement recess 27A is closed at one end by the first substrate portion 18A, and the second engagement recess 27B is closed at the one end by the second folded plate portion 19B.

  Next, the first laminated wall 15A in which the first substrate portion 18A and the first folded plate portion 19A are overlapped is bent with respect to the first end wall 12A, and the second substrate portion 18B and the second folded plate portion 19B are joined together. The overlapped second laminated wall 15B is bent with respect to the second end wall 12B. At this time, the first laminated wall 15A and the second laminated wall 15B are bent so as to be bent in the same direction. Further, the lock portions 33A and 33B of the laminated walls 15A and 15B are inserted and locked in the lock holes 32A and 32B of the end walls 12A and 12B. This prevents the folded plate portions 19A and 19B from floating with respect to the substrate portions 18A and 18B.

  Thereafter, as shown in FIGS. 1A to 2B, the second end wall 12B is bent with respect to the first end wall 12A along the folding line 13 so that the first laminated wall 15A and the second laminated wall 15B approach each other. Then, the first engaging convex portion 26A of the first laminated wall 15A is engaged with the second engaging concave portion 27B of the second laminated wall 15B, and the second engaging convex portion 26B of the second laminated wall 15B is engaged with the first. The laminated wall 15A is engaged with the first engaging recess 27A. Thereby, the integrated third end wall 12C is formed.

  In this cushioning material 10, in the thickness direction of the laminated walls 15A and 15B, the engaging convex portions 26A and 26B of the laminated walls 15A and 15B are vertically moved to the engaging concave portions 27A and 27B of the mating laminated walls 15A and 15B. It is engaged from both directions. Therefore, even if the first laminated wall 15A and the second laminated wall 15B are misaligned in the thickness direction, the engagement between the engaging convex portions 26A and 26B and the engaging concave portions 27A and 27B is released. Can be suppressed. Therefore, the assembled state of the cushioning material 10 can be reliably maintained. In addition, since the cushioning material 10 is formed by bending a single blank, the cushioning material 10 is less expensive than a pulp mold cushioning material and can reduce the storage space when not in use.

  Further, the blank of the cushioning material 10 is provided with the cutting lines 28A and 28B starting from the folding lines 20A and 20B, so that the engaging convex portions 26A and 26B and the engaging concave portions 27A and 27B are provided on the laminated walls 15A and 15B. Is formed. In other words, when forming the engaging convex portions 26A and 26B and the engaging concave portions 27A and 27B, the surroundings of the engaging convex portions 26A and 26B and the engaging concave portions can be obtained simply by inserting the blade and providing the cutting lines 28A and 28B. It is not necessary to drop out the portions in 27A and 27B. Therefore, it is not necessary to provide a complicated positioning mechanism in the punching device for forming the blank. Moreover, the edges of the engaging projections 26A and 26B and the edges of the engaging recesses 27A and 27B are not broken or broken. Therefore, the productivity of the blank is good and the yield can be improved.

(Second Embodiment)
5A to 7B show the cushioning material 10 of the second embodiment. In the cushioning material 10 of the second embodiment, the reinforcing plate portions 36A and 36B are disposed between the substrate portions 18A and 18B and the folded plate portions 19A and 19B, and the laminated walls 15A and 15B are wound into a three-layer structure. It differs from the first embodiment in that it is an assembly method. Specifically, as shown in FIGS. 5A and 5B, the laminated walls 15A and 15B of the cushioning material 10 have the substrate portions 18A and 18B bent with respect to the end walls 12A and 12B, and are formed on the upper surfaces of the substrate portions 18A and 18B. Reinforcing plate portions 36A and 36B are arranged in an overlapping manner, and folded plate portions 19A and 19B are arranged in an overlapping manner on the upper surfaces of the reinforcing plate portions 36A and 36B.

  As shown in FIG. 6, the first reinforcing plate portion 36 </ b> A has a right-angled isosceles triangle shape that is line-symmetric with respect to the first folded plate portion 19 </ b> A. The first reinforcing plate portion 36A is connected to the first folded plate portion 19A via a folding line 37A extending in parallel along the folding line 16A. In other words, the first reinforcing plate portion 36A is connected to the edge located away from the first substrate portion 18A with respect to the first folded plate portion 19A via the folding line 37A. Similarly, the 2nd reinforcement board part 36B is a right-angled isosceles triangle shape axisymmetric with respect to the 2nd folding | turning board part 19B. The second reinforcing plate portion 36B is connected to the second folded plate portion 19B via a folding line 37B extending in parallel along the folding line 16B. That is, the second reinforcing plate portion 36B is connected to the second folding plate portion 19B at the edge located away from the second substrate portion 18B via the folding line 37B.

  Like the folding lines 20A and 20B, the folding lines 37A and 37B include a bridge part 38 and a cutting part 41. One bridge portion 38 is provided so as to be positioned substantially at the center of the boundary between the folded plate portions 19A and 19B and the reinforcing plate portions 36A and 36B. The bridge portion 38 includes a pair of cutting lines 39 and 39 and a pair of folding lines 40. A pair of cutting portions 41 are provided so as to be located on both sides of the bridge portion 38.

  The reinforcing plate portions 36A and 36B are provided with a pair of cutout grooves 43 and 43 on the hypotenuse opposite to the folding lines 37A and 37B. The notch groove 43 is provided at a position overlapping the bridge portion 21 of the folding lines 20A, 20B by bending the reinforcing plate parts 36A, 36B along the folding lines 37A, 37B. The width of the notch groove 43 is the same as the width between the pair of cutting lines 22 of the bridge portion 21.

  Next, an example of a procedure for assembling the blank shown in FIG. 6 as the cushioning material 10 shown in FIG. 5A will be described.

  First, as shown in FIG. 7A, the reinforcing plate portions 36A and 36B are bent with respect to the folded plate portions 19A and 19B along the folding curves 37A and 37B, and then the substrate portions 18A and 18B along the folding curves 20A and 20B. In contrast, the folded plate portions 19A and 19B are bent. Then, as shown in FIG. 7B, the substrate portions 18A and 18B, the reinforcing plate portions 36A and 36B, and the folded plate portions 19A and 19B are stacked in order from the lower side. Thereby, the first engagement convex portion 26A protrudes from the first substrate portion 18A, and the first engagement concave portion 27A is formed in the first folded plate portion 19A. Further, the second engagement convex portion 26B protrudes from the second folded plate portion 19B, and the second engagement concave portion 27B is formed in the second substrate portion 18B. The first engaging recess 27A is closed at one end side by the first reinforcing plate portion 36A, and the second engaging recess 27B is closed at one end side by the second reinforcing plate portion 36B.

  Next, the laminated walls 15A and 15B in which the three plate portions are laminated are bent in the same direction with respect to the end walls 12A and 12B, and the lock portions 33A and 33B of the laminated walls 15A and 15B are locked to the end walls 12A and 12B. It is inserted and locked in the holes 32A and 32B. Thereafter, as shown in FIGS. 5A and 5B, the end walls 12A and 12B are bent along the folding line 13 so that the laminated walls 15A and 15B approach each other, and the engaging convex portions 26A and 26B of the laminated walls 15A and 15B are opposed to each other. Are engaged with the second engaging recesses 27A and 27B of the laminated walls 15A and 15B.

  The cushioning material 10 of the second embodiment can obtain the same operations and effects as those of the first embodiment. Moreover, since each of the laminated walls 15A and 15B has a three-layer structure in which the substrate portions 18A and 18B, the reinforcing plate portions 36A and 36B, and the folded plate portions 19A and 19B are arranged so as to overlap, both the pressure strength and the buffering performance are obtained. Can be improved.

(Third embodiment)
8A to 10 show the cushioning material 10 of the third embodiment. In the cushioning material 10 of the third embodiment, the laminated walls 15A and 15B include the substrate portions 18A and 18B, the folded plate portions 19A and 19B, and the reinforcing plate portions 36A and 36B, as in the second embodiment. This is different in that it is a bellows type assembly method in which the order of stacking is different. Specifically, as shown in FIGS. 8A and 8B, the laminated walls 15A and 15B have the substrate portions 18A and 18B bent with respect to the end walls 12A and 12B, and the folded plate portion 19A is formed on the upper surface of the substrate portions 18A and 18B. 19B are superimposed and reinforcing plate portions 36A and 36B are superimposed on the upper surfaces of the folded plate portions 19A and 19B.

  As shown in FIG. 9, the blank of the cushioning material 10 of the third embodiment is similar to the second embodiment in the end walls 12A and 12B, the substrate portions 18A and 18B, the folded plate portions 19A and 19B, and the reinforcing plate portion. 36A and 36B are arranged in order from the upper side. The lock portions 33A and 33B are provided on the reinforcing plate portions 36A and 36B instead of the folded plate portions 19A and 19B. Further, the reinforcing plate portions 36A and 36B are not provided with the notch groove 43.

  As shown in FIGS. 8A and 8B, the first engaging convex portion 26A of the first laminated wall 15A protrudes from the first substrate portion 18A located at the lower stage. The first engaging recess 27A of the first laminated wall 15A is formed in the first folded plate portion 19A located in the middle stage. The second engaging convex portion 26B of the second laminated wall 15B protrudes from the second folded plate portion 19B located in the middle stage. The second engaging recess 27B of the second laminated wall 15B is formed in the second substrate portion 18B located at the lower stage. Therefore, the first engaging convex portion 26A and the second engaging concave portion 27B are exposed at the lower portion of the laminated walls 15A and 15B. In addition, since the first engagement concave portion 27A and the second engagement convex portion 26B are formed in the middle folded plate portions 19A and 19B, the reinforcing plate portions 36A and 36B are located on the upper surface.

  The first reinforcing plate portion 36A is provided with an insertion hole 45 communicating with the first engagement recess portion 27A in order to engage the second engagement projection portion 26B with the first engagement recess portion 27A located in the middle stage. Yes. Referring to FIG. 9, the insertion hole 45 is formed by a notch provided on the oblique side of the first reinforcing plate portion 36A. The insertion hole 45 of the present embodiment is formed in a rectangular shape larger than the first engagement concave portion 27A. However, if the second engagement convex portion 26B can be inserted, the shape and the like can be changed as desired. Is possible.

  As shown in FIG. 10, when assembling the blank of the cushioning material 10 of the third embodiment, for example, after folding the folded plate portions 19A and 19B with respect to the substrate portions 18A and 18B, the folded plate portions 19A and 19B are formed. On the other hand, the reinforcing plate portions 36A and 36B are bent. Thus, the engaging convex portions 26A and 26B are formed on the respective laminated walls 15A and 15B, and the engaging concave portions 27A and 27B are formed. Next, as shown in FIGS. 8A and 8B, the end walls 12A and 12B are bent, and the first engaging convex portion 26A of the first laminated wall 15A is engaged with the second engaging concave portion 27B of the second laminated wall 15B. . Further, the second engaging convex portion 26B of the second laminated wall 15B is engaged with the first engaging concave portion 27A of the first laminated wall 15A through the insertion hole 45.

(Fourth embodiment)
FIG. 11A to FIG. 13 show the cushioning material 10 of the fourth embodiment. In the cushioning material 10 according to the fourth embodiment, the laminated walls 15A and 15B include the substrate portions 18A and 18B, the folded plate portions 19A and 19B, and the reinforcing plate portions 36A and 36B, as in the third embodiment. These are different in that the order and direction in which these are connected to the end walls 12A and 12B are different. Specifically, as shown in FIGS. 11A and 11B, the laminated walls 15A and 15B are formed by bending reinforcing plate portions 36A and 36B with respect to the end walls 12A and 12B, and a substrate portion on the upper surface of the reinforcing plate portions 36A and 36B. 18A and 18B are arranged in an overlapping manner, and folded plate portions 19A and 19B are arranged in an overlapping manner on the upper surfaces of the substrate portions 18A and 18B.

  As shown in FIG. 12, in the blank of the cushioning material 10 of the fourth embodiment, the reinforcing plate portion 36A is provided on the lower edges (first edge and second edge) of the end walls 12A, 12B via folding lines 16A, 16B. , 36B are continuously provided. Substrate portions 18A and 18B are connected to both side edges of the reinforcing plate portions 36A and 36B via folding lines 37A and 37B. That is, the board portions 18A and 18B are connected to the end walls 12A and 12B via the reinforcing plate portions 36A and 36B. Further, folded plate portions 19A and 19B are connected to the hypotenuses on both sides of the substrate portions 18A and 18B via folding lines 20A and 20B. That is, the board portions 18A and 18B are disposed on the folding lines 16A and 16B side from the folded plate portions 19A and 19B.

  As shown in FIGS. 11A and 11B, the laminated walls 15A and 15B have a bellows type in which reinforcing plate portions 36A and 36B, substrate portions 18A and 18B, and folded plate portions 19A and 19B are arranged in order. It is an assembly method. The first engaging convex portion 26A of the first laminated wall 15A protrudes from the first substrate portion 18A located in the middle stage. The first engaging recess 27A of the first laminated wall 15A is formed in the first folded plate portion 19A located in the upper stage. The second engaging convex portion 26B of the second laminated wall 15B protrudes from the second folded plate portion 19B located in the upper stage. The second engaging recess 27B of the second laminated wall 15B is formed in the second substrate portion 18B located in the middle stage. Therefore, the first engagement recess 27A and the second engagement protrusion 26B are exposed at the upper portions of the laminated walls 15A and 15B. Further, since the first engaging convex portion 26A and the second engaging concave portion 27B are formed in the middle substrate portions 18A and 18B, the reinforcing plate portions 36A and 36B are located on the lower surface. Therefore, the second reinforcing plate portion 36B has the insertion hole 45 communicating with the second engagement recess portion 27B in order to engage the first engagement projection portion 26A with the second engagement recess portion 27B located in the middle stage. It is provided similarly to the third embodiment.

  As shown in FIG. 13, when assembling the blank of the cushioning material 10 of the fourth embodiment, for example, after the board portions 18A and 18B are bent with respect to the reinforcing plate portions 36A and 36B, the board portions 18A and 18B are then bent. The folded plate portions 19A and 19B are bent. Thus, the engaging convex portions 26A and 26B are formed on the respective laminated walls 15A and 15B, and the engaging concave portions 27A and 27B are formed. Next, as shown in FIGS. 11A and 11B, the end walls 12A and 12B are bent, and the second engaging convex portion 26B of the second laminated wall 15B is engaged with the first engaging concave portion 27A of the first laminated wall 15A. . Further, the first engaging convex portion 26A of the first laminated wall 15A is engaged with the second engaging concave portion 27B of the second laminated wall 15B through the insertion hole 45.

(Fifth embodiment)
FIG.14 and FIG.15 shows the shock absorbing material 10 of 5th Embodiment. In the cushioning material 10 of the fifth embodiment, the laminated walls 15A and 15B are formed of the substrate portions 18A and 18B, the folded plate portions 19A and 19B, and the reinforcing plate portions 36A and 36B, as in the second to fourth embodiments. However, the difference is that the folded plate portions 19A and 19B and the reinforcing plate portions 36A and 36B are connected to the substrate portions 18A and 18B. As in the second embodiment, the cushioning material 10 is a three-fold assembly method in which the reinforcing plate portions 36A and 36B are arranged so as to be positioned between the substrate portions 18A and 18B and the folded plate portions 19A and 19B. . The assembled state of the cushioning material 10 is substantially the same as that of the second embodiment shown in FIGS. 5A and 5B.

  As shown in FIG. 14, substrate portions 18A and 18B are connected to end walls 12A and 12B via folding lines 16A and 16B. Folded plate portions 19A and 19B are connected to the substrate portions 18A and 18B via folding lines 20A and 20B on the hypotenuses located away from the end walls 12A and 12B. Reinforcing plate portions 36A and 36B are connected to the substrate portions 18A and 18B at the side edges adjacent to the end walls 12A and 12B via folding lines 37A and 37B. Lock portions 33A and 33B are provided on the folded plate portions 19A and 19B, and a notch groove 43 is provided on the reinforcing plate portions 36A and 36B.

  As shown in FIG. 15, when assembling the blank of the cushioning material 10 of the fifth embodiment, for example, the reinforcing plate portions 36A and 36B are bent with respect to the substrate portions 18A and 18B, and the reinforcing plate is placed on the substrate portions 18A and 18B. The parts 36A and 36B are superposed. Thereafter, the folded plate portions 19A and 19B are bent with respect to the substrate portions 18A and 18B, and the folded plate portions 19A and 19B are arranged in an overlapping manner on the reinforcing plate portions 36A and 36B. Thus, the engaging convex portions 26A and 26B are formed on the respective laminated walls 15A and 15B, and the engaging concave portions 27A and 27B are formed. Next, the end walls 12A and 12B are bent, and the engaging convex portions 26A and 26B of the laminated walls 15A and 15B are engaged with the engaging concave portions 27A and 27B of the mating laminated walls 15A and 15B.

  The cushioning material 10 according to the third to fifth embodiments thus configured can obtain the same operations and effects as those of the second embodiment. Further, as shown in the second to fifth embodiments, the order in which the substrate portions 18A and 18B, the folded plate portions 19A and 19B, and the reinforcing plate portions 36A and 36B constituting the laminated walls 15A and 15B are laminated is continuous. The setting direction and the connecting position can be changed as desired. Specifically, the portions where the reinforcing plate portions 36A and 36B are disposed may be between the substrate portions 18A and 18B and the folded plate portions 19A and 19B, or opposite to the folded plate portions 19A and 19B of the substrate portions 18A and 18B. The side may be sufficient, and the board | substrate part 18A, 18B of folding | turning board part 19A, 19B may be opposite. The folding method of the board portions 18A and 18B, the folded plate portions 19A and 19B, and the reinforcing plate portions 36A and 36B is the same as the winding type assembly method shown in the second embodiment, the third embodiment and the fourth embodiment. Various modifications are possible, such as the bellows type assembly system shown and the three-fold type assembly system shown in the fifth embodiment. In particular, as in the fourth embodiment, the wrapping type assembly method is adopted even for the blank in which the reinforcing plate portions 36A and 36B, the substrate portions 18A and 18B, and the folded plate portions 19A and 19B are continuously provided in the lateral direction. May be. Further, as in the fifth embodiment, the reinforcing plate portions 36A and 36B are folded back plate portions even in a blank in which the folded plate portions 19A and 19B and the reinforcing plate portions 36A and 36B are connected to the substrate portions 18A and 18B. You may superimpose on 19A and 19B.

(Sixth embodiment)
16 to 18 show the cushioning material 10 of the sixth embodiment. As shown in FIG. 16, the cushioning material 10 of the sixth embodiment is different from the embodiments in that the end walls 12A, 12B and the laminated walls 15A, 15B are rectangular in the lateral direction. Further, as shown in FIG. 17, the reinforcing plate portions 36A and 36B are different from the fifth embodiment in that the reinforcing plate portions 36A and 36B are connected to the sides facing the end walls 12A and 12B of the substrate portions 18A and 18B.

  Specifically, as shown in FIG. 16, the laminated walls 15A and 15B are bent in the same direction from the lower ends of the end walls 12A and 12B. In each of the laminated walls 15A and 15B, the substrate portions 18A and 18B, the reinforcing plate portions 36A and 36B, and the folded plate portions 19A and 19B are superposed in order from the lower side. Referring also to FIG. 18, the first laminated wall 15A has a first engagement convex portion 26A formed on the first substrate portion 18A, and a first engagement concave portion 27A formed on the first folded plate portion 19A. Yes. In the second laminated wall 15B, a second engagement convex portion 26B is formed on the second folded plate portion 19B, and a second engagement concave portion 27B is formed on the second substrate portion 18B. The first engaging recess 27A of the first laminated wall 15A is closed at one end side by the first substrate portion 18A at an interval of the corrugated cardboard sheet by the first reinforcing plate portion 36A. The second engagement concave portion 27B of the second laminated wall 15B is closed at one end side by the second folded plate portion 19B with an interval corresponding to the corrugated cardboard sheet by the second reinforcing plate portion 36B.

  Referring to FIG. 17, the blank of the cushioning material 10 includes a pair of end walls 12A and 12B. These end walls 12 </ b> A and 12 </ b> B are continuously provided in the lateral direction via the folding line 13. A first laminated wall 15A is connected to the lower edge of the first end wall 12A via a folding line 16A. A second laminated wall 15B is connected to the lower edge of the second end wall 12B via a folding line 16B.

  The laminated walls 15A and 15B include right-angled trapezoidal substrate portions 18A and 18B connected to the end walls 12A and 12B via folding lines 16A and 16B. Folding plate portions 19A and 19B having a right trapezoidal shape are connected to the substrate portions 18A and 18B via the folding lines 20A and 20B on the inner oblique sides inclined with respect to the folding lines 16A and 16B. Reinforcing plate portions 36A and 36B are connected to the substrate portions 18A and 18B through opposing folding lines 37A and 37B on opposite sides that are parallel to the folding lines 16A and 16B. The reinforcing plate portions 36A and 36B are formed in a quadrangular shape that overlaps only on the sides of the substrate portions 18A and 18B and does not overlap on the oblique side.

  As shown in FIG. 18, when assembling the blank of the cushioning material 10 of the sixth embodiment, for example, the reinforcing plate portions 36A and 36B are bent with respect to the substrate portions 18A and 18B, and the reinforcing plate is placed on the substrate portions 18A and 18B. The parts 36A and 36B are superposed. Next, the folded-back plate portions 19A and 19B are bent with respect to the substrate portions 18A and 18B, and the folded-back plate portions 19A and 19B are arranged so as to overlap with the reinforcing plate portions 36A and 36B. Thereby, engagement convex part 26A, 26B and engagement recessed part 27A, 27B are formed in lamination | stacking wall 15A, 15B similarly to each embodiment. Thereafter, the end walls 12A and 12B are bent along the folding line 13, and the first engaging convex portion 26A of the first laminated wall 15A is engaged with the second engaging concave portion 27B of the second laminated wall 15B. The second engaging convex portion 26B of the wall 15B is engaged with the first engaging concave portion 27A of the first laminated wall 15A.

  Thereby, in the thickness direction of the laminated walls 15A and 15B, it is possible to assemble the cushioning material 10 in which the engaging convex portions 26A and 26B are engaged with the engaging concave portions 27A and 27B from both the upper and lower directions. And this buffer material 10 can acquire the effect | action and effect similar to each embodiment. Moreover, the structure which makes laminated wall 15A, 15B a horizontal shape like this 6th Embodiment can be used also for the shock absorbing material 10 of 1st Embodiment to 5th Embodiment.

(Seventh embodiment)
FIG.19 and FIG.20 shows the shock absorbing material 10 of 7th Embodiment. In the cushioning material 10 of the seventh embodiment, the third end wall 12C including the first laminated wall 15A and the second laminated wall 15B is provided on one end side of the first end wall 12A and the second end wall 12B. This embodiment is different from each embodiment in that a fourth end wall 12D including a first buffer wall 60A and a second buffer wall 60B is provided on the other end side of the first end wall 12A and the second end wall 12B.

  As shown in FIG. 19, the end walls 12A and 12B are flat rectangular plates, respectively, and are bent so as to be positioned 90 degrees apart from each other. The first end wall 12 </ b> A and the second end wall 12 </ b> B are arranged at the center in the vertical direction, and are connected via the folding line 13. In the end walls 12A and 12B, the first locking holes 50 extending in the lateral direction are provided at two locations on the laminated walls 15A and 15B side with a space in the lateral direction and at one location on the buffer walls 60A and 60B side. . The first locking hole 50 is formed of an elongated slit formed by punching.

  The laminated walls 15A and 15B are bent in the same direction from the lower edges of the end walls 12A and 12B. The substrate portions 18A and 18B of the laminated walls 15A and 15B are formed in a right trapezoid shape, and are connected to the end walls 12A and 12B via folding lines 16A and 16B. The substrate portions 18A and 18B of the present embodiment are provided with a pair of second locking holes 51 made of elongated slits formed by punching along the folding lines 16A and 16B. The folded plate portions 19A and 19B of the laminated walls 15A and 15B are connected to the oblique sides of the substrate portions 18A and 18B via folding lines 20A and 20B. The folded plate portions 19A and 19B are formed in a right-angled isosceles triangle shape having the oblique sides of the substrate portions 18A and 18B as the same oblique sides.

  The first laminated wall 15A is provided with a cutting line 28A in the first folded plate portion 19A, so that a first engagement convex portion 26A is formed in the first substrate portion 18A, and a first engagement is formed in the first folded plate portion 19A. A concavity 27A is formed. The second laminated wall 15B is provided with a cutting line 28B in the second substrate portion 18B, whereby a second engagement convex portion 26B is formed in the second folded plate portion 19B, and a second engagement is performed in the second substrate portion 18B. A recess 27B is formed.

  The third end wall 12C of the seventh embodiment is provided with a first holding plate portion 52A that extends obliquely from the front end of the first laminated wall 15A to the first end wall 12A. A second holding plate portion 52B is provided extending obliquely toward the two end walls 12B. The holding plate portions 52A and 52B are connected to the substrate portions 18A and 18B via folding lines 53A and 53B made of lead rules. The holding plate portions 52A and 52B are formed in a right-angled trapezoidal shape substantially corresponding to the substrate portions 18A and 18B.

  Positioning plate portions 55A and 55B that hold the inclined state of the holding plate portions 52A and 52B are provided at the tips of the holding plate portions 52A and 52B. The positioning plate portions 55A and 55B are formed in an elongated rectangular shape, and are connected to the holding plate portions 52A and 52B via folding lines 56A and 56B. A pair of first locking pieces 57 that are locked to the first locking holes 50 and 50 of the end walls 12A and 12B are provided on the holding plate portions 52A and 52B so as to protrude from the folding lines 56A and 56B. . A pair of second locking pieces 58, 58 that are locked to the second locking holes 51, 51 of the board portions 18 </ b> A, 18 </ b> B protrude from the positioning plate portions 55 </ b> A, 55 </ b> B.

  The buffer walls 60A and 60B are bent in the same direction as the laminated walls 15A and 15B from the upper edges of the end walls 12A and 12B. The buffer walls 60A and 60B are continuous to the outer plate portions 62A and 62B continuous to the end walls 12A and 12B, the end plate portions 70A and 70B continuous to the outer plate portions 62A and 62B, and the end plate portions 70A and 70B. Inner plate portions 77A and 77B are provided.

  The outer plate portions 62A and 62B are formed in a right-angled trapezoidal shape that is axisymmetric to the substrate portions 18A and 18B, and are connected to the end walls 12A and 12B via a folding line 63 made of a lead rule. A lock piece 64 projects from the oblique side of the first outer plate portion 62A. An overlapping plate portion 65 is connected to the oblique side of the second outer plate portion 62B via a folding line 66. Further, the second outer plate portion 62 </ b> B is provided with a lock hole 67 through which the lock piece 64 is penetrated and locked along the folding line 66.

  The end plate portions 70A and 70B each include a first portion 71 to a third portion 73 that are bent in the same direction but have different inclination angles. The first portion 71 to the third portion 73 are connected to the sides excluding the oblique sides of the outer plate portions 62A and 62B extending in parallel along the folding line 63. The first portion 71 is located at both ends of the outer plate portions 62A and 62B, and is bent so as to extend in a direction orthogonal to the outer plate portions 62A and 62B. The second portion 72 is bent so as to extend from the front ends of the outer plate portions 62A and 62B in an inclined manner in a direction approaching the laminated walls 15A and 15B and the end walls 12A and 12B. The third portion 73 is bent so as to extend obliquely from the front ends of the outer plate portions 62A and 62B in a direction away from the laminated walls 15A and 15B and from the end walls 12A and 12B. The first portion 71 to the third portion 73 are partitioned by a cutting line 74 extending from the outer plate portions 62A and 62B to the inner plate portions 77A and 77B. The first portion 71 to the third portion 73 are connected to the outer plate portions 62 </ b> A and 62 </ b> B via a folding line 75 extending in parallel along the folding line 63.

  The inner plate portions 77A and 77B are connected to the first portion 71 to the third portion 73 of the end plate portions 70A and 70B via a folding line 78 extending in parallel along the folding line 75. The inner plate portions 77A and 77B are bent so as to extend in the orthogonal direction from the lower ends of the outer plate portions 62A and 62B toward the end walls 12A and 12B. The inner plate portions 77A and 77B are provided with locking pieces 79 that are locked in the first locking holes 50 of the end walls 12A and 12B.

  When assembling the blank of the cushioning material 10 according to the seventh embodiment, for example, the folded plate portions 19A and 19B are bent with respect to the substrate portions 18A and 18B, thereby forming the engaging convex portions 26A and 26B and engaging them. Recesses 27A and 27B are formed. Next, the holding plate portions 52A and 52B are bent with respect to the substrate portions 18A and 18B, and the positioning plate portions 55A and 55B are bent with respect to the holding plate portions 52A and 52B. Then, the board portions 18A and 18B are bent with respect to the end walls 12A and 12B, and the first locking piece 57 is locked to the first locking hole 50, and the second locking piece 58 is locked to the second locking hole. Lock to 51.

  Further, the end plate portions 70A and 70B are bent with respect to the outer plate portions 62A and 62B, and the inner plate portions 77A and 77B are bent with respect to the end plate portions 70A and 70B. Then, the outer plate portions 62 </ b> A and 62 </ b> B are bent with respect to the end walls 12 </ b> A and 12 </ b> B, and the locking piece 79 is locked in the first locking hole 50.

  Thereafter, the end walls 12A and 12B are bent so that the first engaging convex portion 26A of the first laminated wall 15A is engaged with the second engaging concave portion 27B of the second laminated wall 15B, and the second laminated wall 15B is second. The engaging convex part 26B is engaged with the first engaging concave part 27A of the first laminated wall 15B. Further, the overlapping plate portion 65 of the second buffer wall 60B is disposed on the inner surface side of the first outer plate portion 62A of the first buffer wall 60A, and the lock piece 64 of the first outer plate portion 62A is disposed on the second outer plate portion 62B. Insert into the lock hole 67 from the outside.

  Thus, in the cushioning material 10 of the seventh embodiment, the engagement convex portions 26A and 26B and the engagement concave portions 27A and 27B are engaged on the one laminated wall 15A and 15B side, and the other buffer walls 60A and 60B are engaged. The lock piece 64 and the lock hole 67 are engaged on the side, so that the assembled state is maintained. And, in this cushioning material 10, by disposing an article between the third end wall 12C made up of the laminated walls 15A and 15B and the fourth end wall 12D made up of the buffered walls 60A and 60B, from the impact from the outside. The article can be protected.

  In the seventh embodiment thus configured, the same operations and effects as in the first embodiment can be obtained. Further, as in the seventh embodiment, the cushioning material 10 is not limited to the corner pad, and various modifications can be made.

  In addition, the buffer material 10 of this invention is not limited to the structure of the said embodiment, A various change is possible.

  For example, the laminated walls 15A and 15B have the folded plate portions 19A and 19B laminated on the substrate portions 18A and 18B toward the tips (upward) of the end walls 12A and 12B, but are laminated in the opposite direction (away direction). May be. In the second to sixth embodiments, one reinforcing plate portion 36A, 36B is provided, but two or more reinforcing plate portions may be provided. Further, the end walls 12A and 12B have a single-layer structure composed of one sheet, but may have a laminated structure of two or more sheets.

  The folding lines 20A, 20B, 37A, and 37B are configured to include the bridge portions 21 and 38 and the cutting portions 24 and 41. Alternatively, it may be constituted by a lead rule similar to the folding line 13, or may be constituted by a half cut line obtained by cutting a part of the thickness of the cardboard sheet. That is, the folding lines 20A, 20B, 37A, and 37B can be variously modified as long as they can be bent according to the material.

  Further, the cushioning material 10 is formed in a square shape in plan view in the first to fifth embodiments, and is formed in an L shape in plan view in the sixth and second embodiments. It can be changed. For example, as shown in FIG. 21A, it may be a rhombus with a narrow width in the direction orthogonal to the folding lines 20A and 20B, or as shown in FIG. 21B, the direction orthogonal to the folding lines 20A and 20B. It is good also as the rhombus shape which widened the width | variety. That is, the angle at which the second end wall 12B is bent with respect to the first end wall 12A is not limited to 90 degrees and can be changed as desired.

  Moreover, although the end walls 12A and 12B and the laminated walls 15A and 15B have been described with reference to examples made of flat plates, they may be bent or curved. In the embodiment, the cushioning material 10 is formed by punching a paper cardboard sheet, but it may be formed by punching a resin cardboard sheet. Moreover, it is not restricted to a corrugated board sheet, You may form with a single cardboard or a resin sheet.

DESCRIPTION OF SYMBOLS 1A, 1B ... Corrugated cardboard sheet 2 ... Front liner 3 ... Back liner 4 ... Middle liner 5 ... Middle shin 10 ... Buffer material 12A ... 1st end wall 12B ... 2nd end wall 12C ... 3rd end wall 12D ... 4th end wall 13 ... Folding curve 15A ... First laminated wall 15B ... Second laminated wall 16A ... Folding curve (first edge)
16B ... Bent curve (second edge)
18A ... 1st board | substrate part 18B ... 2nd board | substrate part 19A ... 1st folding | turning board part 19B ... 2nd folding | turning board part 20A ... Folding curve (1st folding curve)
20B ... Folding curve (second folding curve)
DESCRIPTION OF SYMBOLS 21 ... Bridge part 22 ... Cutting line 23 ... Folding curve 24 ... Cutting part 26A ... 1st engagement convex part 26B ... 2nd engagement convex part 27A ... 1st engagement recessed part 27B ... 2nd engagement recessed part 28A ... Cutting line (First cutting line)
28B ... cutting line (second cutting line)
29 ... 1st cutting part 30 ... 2nd cutting part 32A ... 1st lock hole 32B ... 2nd lock hole 33A ... 1st lock part 33B ... 2nd lock part 34 ... Cutting line 36A ... 1st reinforcement board part 36B ... 1st 2 Reinforcing plate portions 37A, 37B ... Bending curve 38 ... Bridge portion 39 ... Cutting line 40 ... Bending curve 41 ... Cutting portion 43 ... Notched groove 45 ... Insertion hole 50 ... First locking hole 51 ... Second locking hole 52A, 52B ... Holding plate portion 53A, 53B ... Folding curve 55A, 55B ... Positioning plate portion 56A, 56B ... Folding curve 57 ... First locking piece 58 ... Second locking piece 60A, 60B ... Buffer wall 62A, 62B ... Outer plate Part 63 ... Folding curve 64 ... Lock piece 65 ... Overlapping plate part 66 ... Folding curve 67 ... Lock holes 70A, 70B ... End plate part 71 ... First part 72 ... Second part 73 ... Third part 74 ... Cutting line 75 ... Bending curve 77A, 77B ... inner plate 78 ... Bent curve 79 ... Locking piece

Claims (3)

A first end wall;
A second end wall bent with respect to the first end wall;
A first laminated wall that is continuous with the first edge of the first end wall and is bent with respect to the first end wall;
A second laminated layer continuous with the second edge of the second end wall located along the first edge and bent in the same direction as the first laminated wall with respect to the second end wall; With walls,
The first laminated wall includes a first substrate portion positioned on the first edge side of the first end wall, and a first folded plate portion disposed to overlap the first substrate portion, The first substrate portion and the first folded plate portion are bent along the first folding line on the side facing the second laminated wall;
The second laminated wall includes a second substrate portion located on the second edge side of the second end wall, and a second folded plate portion arranged to overlap the second substrate portion, The second substrate part and the second folded plate part are bent along a second folding line on the side facing the first laminated wall;
The first laminated wall is provided with a first engagement convex portion that protrudes toward the second laminated wall from the first folding line on the first substrate portion, and the first folded plate A first engagement recess that is closed to the first substrate portion in a shape that is complementary to the first engagement protrusion from the first folding line as a starting point;
The second laminated wall has a second engaging convex portion having the same shape as the first engaging concave portion that protrudes from the second folding plate portion toward the first laminated wall side at the second folding plate portion. A second engaging recess having a shape complementary to the second engaging convex portion starting from the second folding curve and closed on the second folded plate portion side. Is provided,
The first engaging convex portion of the first laminated wall is engaged with the second engaging concave portion of the second laminated wall, and the second engaging convex portion of the second laminated wall is the first The shock absorbing material engaged with the said 1st engaging recessed part of 1 laminated wall. The first laminated wall has a first reinforcing plate portion that is disposed to overlap at least one of the first substrate portion and the first folded plate portion,
The cushioning material according to claim 1, wherein the second laminated wall includes a second reinforcing plate portion that is disposed to overlap at least one of the second substrate portion and the second folded plate portion. A first end wall;
A second end wall continuous to the first end wall;
A first laminated wall continuous to a first edge of the first end wall;
A second laminated wall continuous with the second edge of the second end wall extending along the first edge;
The first laminated wall includes a first substrate portion connected to the first edge side of the first end wall and a first substrate extending obliquely with respect to the first edge of the first end wall. A first folded plate portion connected to the first substrate portion via a folding line;
The second laminated wall includes a second substrate portion that is connected to the second edge side of the second end wall, and a second wall that is inclined with respect to the second edge of the second end wall. A second folded plate portion connected to the second substrate portion via a folding line;
The first laminated wall is provided with a first cutting line extending around the first folding plate portion starting from the first folding line, and the first substrate line is formed by the first cutting line. A continuous first engaging convex portion is provided and a first engaging concave portion is provided in the first folded plate portion,
The second laminated wall is provided with a second cutting line extending around the second substrate section from the second folding curve, and the second folding plate section is provided by the second cutting line. A blank of shock-absorbing material, in which a continuous second engaging convex portion is provided and a second engaging concave portion is provided in the second substrate portion.

Images