JP2009057086A - Pulp mold buffering material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pulp mold buffering material which can effectively absorbs externally applied impact force without an increase in volume, and offers superior workability. <P>SOLUTION: When a side face support portion 3 is rotated on a hinge portion 2 in the direction of an arrow X, the front end 8aa of the upper face of a projection 8a comes in contact with a thin-walled portion 11a. Rotating the side face support portion 3 further with additional force causes the projection 8a to break through the thin-walled portion 11a and proceed into a recession 9a while widening a pullout hole 10a. The surface of the buffering material 1 is a rough surface, and the projection 8a is inserted into the pullout hole 10a in pressure insertion. Because of this, the upper end 13 of the recession 9a and the thin-walled portion 11a broken by the forced entry of the projection 8a get caught on the rear end 8ab of the projection 8a. As a result, a frictional force between the projection 8a, the upper end 13 of the recession 9a, and the thin-walled portion 11a becomes greater than the restitutive force of the hinge portion 2, which keeps the buffering material 1 in a folded shape. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention, for example, when a product such as an electronic device is packed in a packaging box such as a cardboard box for packaging and placed between the product and the packaging box, it is dropped during transportation or storage. The present invention relates to a cushioning material for packing used to protect a product by buffering an impact applied from the outside at times.

  As such a conventional cushioning material for packing, for example, a material obtained by folding cardboard, foamed polystyrene, or a combination thereof as a filling material is used. However, corrugated cardboard can be used when a rough shape is acceptable, but cannot be used when it is desired to make a complicated shape according to the product. In contrast, expanded polystyrene has the advantage that it can be formed into any complex shape.

  However, although the polystyrene has such advantages, there is a problem that it is not only expensive for disposal, but also causes pollution and environmental pollution. For this reason, in recent years packaging that has been formed into a desired shape by a pulp mold molding method that can be recycled using waste paper as a material is less expensive and less likely to cause pollution and environmental pollution. It has begun to be used as a shock absorber

  The packing cushioning material formed by this pulp mold molding method is, for example, cutting used collected recovered paper, putting water and chemicals into melted raw material, and putting the male mold in it. After draining in a vacuum, the product formed into a desired shape can be obtained by drying. Well-known application products include, for example, a chicken egg protection pack for storing and protecting eggs.

  The cushioning material for packing by the pulp mold molding method related to such a process is called a soft type, but in addition to this, forging molding that is solid so that there is no gap on the back side of the product support surface of the cushioning material by hydraulic pressure There is also a so-called hard type related to a similar molding method.

  In conventional pulp mold cushioning materials, cushioning properties are ensured by ensuring a sufficient depth (buffer stroke) from the position where the impact is applied to the packaged item or by increasing the receiving area of the product support surface. Improvements were made. However, in order to provide sufficient buffer performance, the volume of the buffer material increases, the cost of the buffer material itself increases, and the volume of the buffer material also increases, so that the storage and transportation costs also increase. Therefore, it is necessary to provide sufficient cushioning performance without increasing the size of the cushioning material.

By the way, in Patent Document 1, buffer performance is maintained by supporting two surfaces of a product with a first surface holding portion and a second surface holding portion formed by bending a part of the integrally formed cushioning material. However, a cushioning material made of polyolefin resin having a reduced bulk density during storage is disclosed.
JP-A-9-30565

  When the pulp mold cushioning material is folded and used in the same manner as the cushioning material of Patent Document 1, the folded portion (hinge portion) rebounds due to the restoring force when placed in the packing box, and the cushioning material is removed from the corner of the box. It floated up and moved inward, making packing work worse. Further, in the configuration in which a concave portion and a convex portion that can be fitted to the bent portion are provided and press-fitted as in Patent Document 1, there is a case where the press-fit cannot be smoothly performed due to a thickness tolerance of the mold. On the other hand, when the convex portion is formed in advance smaller than the concave portion, there is a problem that the fitting is easily released and the workability is lowered.

  In view of the above problems, the present invention provides a pulp mold cushioning material that can effectively absorb an impact force applied from the outside without increasing the volume of the cushioning material and is excellent in packing workability. With the goal.

  In order to achieve the above object, the present invention provides a first and a second support part that are formed from a pulp-based material using a mold by a pulp molding method, and that support two adjacent surfaces of an object to be packed, And a hinge part that couples the second support part in a foldable manner, a projection part that protrudes from the inner surface of one of the first and second support parts, and the projection part of the first and second support parts Is a pulp mold cushioning material provided with a thin-walled portion that is formed in a portion facing each other and can be broken and penetrated by the protruding portion.

  In the pulp mold cushioning material having the above-described configuration, the first and second support portions each have a reference surface that is contacted when bent along the hinge portion. The thin-walled portion penetrates with the reference surface in contact.

  In the pulp mold cushioning material having the above-described configuration, the present invention is characterized in that the protrusion and the thin portion are formed on a slope inclined at a predetermined angle with respect to the reference surface.

  In the pulp mold cushioning material having the above-described configuration, the present invention is characterized in that a punched hole is formed adjacent to the thin portion.

  According to the first configuration of the present invention, the pulp mold cushioning material is folded and used by breaking and penetrating the thin-walled portion with the protrusion formed on one of the first and second support portions. In this case, since the folded state can be easily maintained, the packaging workability is improved. In addition, unlike the configuration in which the concave and convex portions are simply fitted together, it is not possible to fit due to dimensional tolerances or the fitting is not easily disengaged. Will also improve.

  Further, according to the second configuration of the present invention, in the pulp mold cushioning material of the first configuration, each of the first and second support portions has a reference surface that comes into contact when bent along the hinge portion. In addition, since the protruding portion penetrates the thin-walled portion in a state where the reference surface is in contact, the cushioning material can always be bent into a certain shape and maintained in that shape.

  Further, according to the third configuration of the present invention, in the pulp mold cushioning material of the second configuration, the protrusion and the thin portion are formed on the slope inclined by a predetermined angle with respect to the reference surface, thereby the protrusion. Since the portion extends through the thin portion from the oblique direction and penetrates, the friction between the protrusion and the thin portion is increased, and the cushioning material can be more effectively prevented from opening.

  According to the fourth configuration of the present invention, in the pulp mold cushioning material of any one of the first to third configurations, the thin-walled portion is broken by forming the punched hole adjacent to the thin-walled portion. As a result, the assembling workability of the cushioning material is improved. In addition, the thin portion can be easily formed simultaneously with the punched hole when the buffer material is molded.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a plan view of a cushioning material made of pulp mold of the present invention, and FIG. 2 is a side view seen from below in FIG. As shown in FIG. 1, the cushioning material 1 is integrally formed from a pulp-based material by a pulp molding method, and includes a side support portion 3 that supports a side surface of an object to be packed (not shown) via a hinge portion 2. A bottom surface support portion 4 that supports the bottom surface of the article to be packed is connected so as to be bendable. The side surface support portion 3 and the bottom surface support portion 4 have a shell shape (hollow shape), and a rib 5 and a flat portion 6 are formed in accordance with the outer shape of the article to be packed and the required pressure strength.

  Convex portions 7a and 7b are formed at two locations on the left and right sides of the inner surface of the side support portion 3, and projecting portions 8a and 8b are projected from the upper surfaces of the convex portions 7a and 7b. Concave portions 9a and 9b are formed on the inner surface of the bottom support portion 4, and through holes 10a and 10b are opened in part of the bottom surfaces of the concave portions 9a and 9b. Further, in order to facilitate the folding of the hinge part 2, two holes 10 c and 10 d are provided so as to overlap the hinge part 2.

  3 is a cross-sectional view taken along the line AA ′ of FIG. In the following description, only the configuration on one end side (right side in FIG. 1) of the cushioning material 1 will be described, but the configuration on the other end side (right side in FIG. 1) of the cushioning material 1 is exactly the same. The side support part 3 and the bottom support part 4 have a substantially triangular shape when viewed from the side. First side surfaces 3 a are provided at both longitudinal ends of the side support part 3, and second reference sides are provided at both longitudinal ends of the bottom support part 4. A surface 4a is provided. The convex portion 7a protrudes in a mountain shape from the first reference surface 3a, and the concave portion 9a is recessed from the second reference surface 4a in substantially the same shape as the convex portion 7a.

  FIG. 4 is a view showing a state in which the cushioning material 1 is folded in half by the hinge portion 2 from the state of FIG. When the side surface support portion 3 and the bottom surface support portion 4 are bent along the hinge portion 2, the bending angle is regulated by the first reference surface 3a and the second reference surface 4a coming into contact with each other, and the shape of the cushioning material 1 is unambiguous. Is determined. Moreover, the convex part 7a and the protrusion part 8a enter the concave part 9a, thereby preventing the side surface support part 3 and the bottom surface support part 4 from opening to the original state by the restoring force of the hinge part 2. The cushioning material 1 bent in this way is arranged along the inner surface of the outer box 100, and an object to be packed is placed according to the shape of the rib 5 and the recess 6.

  Next, the lock mechanism when the cushioning material of the present invention is bent will be described. FIG. 5 is an enlarged perspective view of the vicinity of the convex portion 7a and the concave portion 9a in FIG. The convex part 7a and the concave part 9a have substantially the same cross section, and the concave part 9a is slightly larger than the convex part 7a so that the convex part 7a fits smoothly into the concave part 9a when the cushioning material 1 is bent as shown in FIG. Is formed. The punch hole 10a formed on the bottom surface of the recess 9a is designed to be slightly larger than the protrusion 8a on the mold (broken line region in FIG. 5), but the thin portion 11a (FIG. 5) is formed when the cushioning material 1 is molded. In the actual molded product, the holes are smaller than the protrusions 8a. The thickness of the cushioning material 1 and the thin portion 11a is not particularly limited as long as the thin portion 11a can be broken by the insertion of the protruding portion 8a. For example, the thickness of the cushioning material 1 is about 2 mm to 2.5 mm. The thin portion 11a is about 0.1 mm to 0.5 mm.

  FIG. 6 is an enlarged view of the vicinity of the hinge portion 2 in FIG. When the side surface support portion 3 is rotated in the direction of the arrow X with the hinge portion 2 as a fulcrum from the state of FIG. 6, the front end portion 8aa on the upper surface of the projection portion 8a contacts the thin portion 11a as shown in FIG. Touch. When force is further applied from the state of FIG. 7A to rotate the side support portion 3 in the direction of the arrow X, the protrusion 8a pushes through the thin portion 11a and is inserted into the recess 9a while widening the punch hole 10a. Go. When the first reference surface 3a and the second reference surface 4a come into contact with each other, as shown in FIG. 7B, the protruding portion 8a penetrates the thin portion 11a, and the convex portion 7a is completely in the concave portion 9a. It will fit.

  In the state of FIG. 7B, the restoring force of the hinge portion 2 acts in a direction to open the side surface support portion 3 and the bottom surface support portion 4. However, the surface of the pulp mold cushioning material is a rough surface, and the protrusion 8a pushes the thin-walled portion 11a from the oblique direction and is inserted into the press-fitting manner. The portion 11a is caught on the rear end portion 8ab of the protruding portion 8a. As a result, the frictional force between the protruding portion 8a and the upper end portion 13 of the concave portion 9a and the thin portion 11a becomes larger than the restoring force of the hinge portion 2, and the cushioning material 1 is held in a bent shape (see FIG. 4). .

  According to the configuration of the present invention, when the pulp mold cushioning material is folded and used, the folded state can be easily maintained, and the packaging workability is improved. Further, unlike the configuration in which the concave portion and the convex portion are simply fitted together, it is not possible to fit due to dimensional tolerance or the fitting is not easily detached, so that the cushioning material can be easily manufactured and the yield can be improved. .

  Further, the protrusions 8a and 8b are formed on the upper surfaces of the protrusions 7a and 7b, that is, on the slope inclined by a predetermined angle with respect to the first reference surface 3a. Further, the thin portions 11a and 11b are formed on the bottom surfaces of the recesses 9a and 9b, that is, on the inclined surfaces inclined by a predetermined angle with respect to the second reference surface 4a. Here, the protrusions 8a and 8b may be provided on the first reference surface 3a, and the thin portions 11a and 11b may be provided on the second reference surface 4a. However, the restoring force of the hinge portion 2 is as shown in FIG. Since it acts in the direction of arrow Y, the press-fitting direction of the protrusions 8a and 8b and the direction of the restoring force overlap, and the side surface support portion 3 and the bottom surface support portion 4 are easily opened. Therefore, it is preferable to provide the protrusions 8a and 8b and the thin portions 11a and 11b at a predetermined angle with respect to the first reference surface 3a and the second reference surface 4a as in the present embodiment.

  In the above-described embodiment, the lock mechanisms including the protrusions 8a and 8b, the through holes 10a and 10b, and the thin portions 11a and 11b are provided at the two left and right positions of the cushioning material 1, but may be provided at three or more locations. Further, the shape and size of the protrusions and the punched holes, the thickness of the thin portion, and the like may be appropriately set according to the size of the cushioning material 1 and the restoring force of the hinge portion 2.

  In addition, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the meaning of this invention. For example, in the above embodiment, the hole 10a and the thin portion 11a are provided on the bottom surface of the recess 9a. However, if the thin portion 11a can be pushed through by the protruding portion 8a, the hole 10a is not necessarily required. Further, when it is difficult to push and break the thin portion 11a with the protruding portion 8a, a slit may be made in the thin portion 11a.

  Further, the convex portions 7a and 7b and the protruding portions 8a and 8b may be provided on the bottom surface support portion 4 side, and the concave portions 9a and 9b, the through holes 10a and 10b, and the thin wall portions 11a and 11b may be provided on the side surface support portion 3 side. . Further, the protrusions 8a and 8b can be provided in the recesses 9a and 9b, and the through holes 10a and 10b and the thin portions 11a and 11b can be provided on the upper surfaces of the protrusions 7a and 7b.

  The present invention relates to first and second support portions that support two adjacent surfaces of an object to be packed, a hinge portion that connects the first and second support portions in a foldable manner, and first and second support portions. A pulp mold buffer comprising: a protruding portion protruding from one of the inner surfaces; and a thin wall portion formed on a portion of the first and second support portions where the protruding portion faces each other and capable of being broken and penetrated by the protruding portion. It is a material.

  Thereby, since the state which bent the pulp mold buffer material can be maintained easily, the pulp mold buffer material which improves packing workability | operativity can be provided simply and at low cost.

  In addition, each of the first and second support portions has a reference surface that abuts when bent along the hinge portion, and the protruding portion penetrates the thin portion with the reference surface abutting. Using the surface, the cushioning material is always bent into a fixed shape and becomes a pulp mold cushioning material that can be maintained in that shape. At this time, if the protrusion and the thin portion are formed on a slope inclined by a predetermined angle with respect to the reference plane, the opening of the cushioning material can be more effectively prevented.

  Further, if a punched hole is formed adjacent to the thin portion, the thin portion is easily broken and the assembly workability of the cushioning material is improved. Further, if the punched hole is formed simultaneously with the molding of the cushioning material, the thin wall portion can be easily formed around the punched hole.

These are top views of the buffer material made from pulp mold of the present invention. These are side views of the cushioning material made from pulp mold of the present invention. These are sectional drawings (AA 'section of Drawing 1) of the buffer material made from pulp mold of the present invention. These are sectional drawings which show the state which assembled the buffer material made from pulp mold of this invention. These are the expansion perspective views of the convex part 7a and the recessed part 9a vicinity of the cushioning material made from a pulp mold of this invention. These are the enlarged views of the hinge part 2 vicinity in FIG. These are the fragmentary sectional views which show a mode that a projection part is inserted in a thin part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Buffer material 2 Hinge part 3 Side surface support part (1st support part)
3a First reference surface 4 Bottom support part (second support part)
4a 2nd reference surface 5 Rib 6 Flat part 7a, 7b Protrusion part 8a, 8b Protrusion part 9a, 9b Recession part 10a-10d Punching hole 11a, 11b Thin part 100 Outer box

Claims (4)

It is formed using a mold from a pulp-based material by a pulp mold molding method,
First and second support parts for supporting two adjacent surfaces of the object to be packed;
A hinge part for connecting the first and second support parts in a foldable manner;
A protrusion protruding from the inner surface of one of the first and second support portions;
A thin-walled portion that is formed on a portion of the first and second support portions facing the protruding portion and can be broken and penetrated by the protruding portion;
Pulp mold cushioning material comprising   The first and second support portions each have a reference surface that abuts when bent along the hinge portion, and the projection portion breaks the thin portion with the reference surface in contact. The pulp mold cushioning material according to claim 1, wherein the cushioning material is made of a pulp mold.   3. The pulp mold cushioning material according to claim 2, wherein the protrusion and the thin portion are formed on a slope inclined at a predetermined angle with respect to the reference surface.   The pulp mold cushioning material according to any one of claims 1 to 3, wherein a punched hole is formed adjacent to the thin portion.

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