JP2010285208A - Pulp mold-made cushioning material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pulp mold-made cushioning material which reduces an amount of a used pulp mold material constructing a cushioning material as much as possible, and shows excellence in stiffness during transportation and packaging work. <P>SOLUTION: The cushioning material 1 is integrally formed of the pulp mold-based material by a pulp mold molding method. A side surface support 3 supporting a side surface of a packaged item is bendably connected to a bottom surface support 4 supporting a bottom surface of the packaged item via a hinge 2. There is formed in the approximately central part of the cushioning material 1 a rectangular opening 11 extending from a part (flat part 6) between protrusions 5 formed on the left and right of the side surface support 3 across the hinge 2 to the bottom surface support 4. Both the left and right sides of the side surface support 3 are connected to each other by a rib 13 having a stepwise cross section formed along the opening 11. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention, for example, when a product such as an electronic device is packed in a packing box such as a cardboard box for packing and placed between the product and the packing 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 costly for disposal and less likely to cause pollution and environmental pollution. It has begun to be used as a cushioning material.

  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.

  As an example of a soft type cushioning material, for example, Patent Document 1 discloses a packaging method for protecting a bottom surface and a top surface of a product using a single pad (buffer material). It is described that it comprises. In Patent Document 2, the first support part and the second support part, which are formed by bending a part of the integrally formed cushioning material, are used to support the two surfaces of the product, thereby maintaining the cushioning performance. A pulp mold cushioning material that suppresses the bulkiness of time is disclosed.

JP 2000-255549 A JP 2009-57086 A

  In the conventional pulp mold cushioning materials as shown in Patent Documents 1 and 2, since the pulp mold material is used also in the buffer unnecessary portion where the product does not contact, the cost of the cushioning material itself is increased, and the cushioning material The weight of was also increased.

  In view of the above-mentioned problems, the present invention aims to provide a pulp mold cushioning material that reduces the amount of the pulp mold material that constitutes the cushioning material as much as possible, and that is excellent in rigidity at the time of transportation or packing operation. And

  In order to achieve the above object, the present invention provides a projection formed from a pulp-based material by a pulp mold molding method using a mold, a projection that contacts the package, and a package that extends between the projection and the non-package. A pulp mold cushioning material comprising: a flat portion of contact; an opening formed in the flat portion; and a rib having a stepped cross section formed between the opening and an outer edge of the flat portion. is there.

  In the pulp mold cushioning material having the above-described configuration, the present invention is characterized in that an inclined portion having an upward slope from the center side of the rib toward the base end portion is provided in the vicinity of the base end portion of the rib.

  In the pulp mold cushioning material of the present invention, the protrusion and the flat part are connected to the side surface support part for supporting the side surface of the packaged object and the side surface support part so as to be bendable via the hinge part. And is formed on a bottom surface supporting portion that supports the bottom surface of the packaged object.

  In the pulp mold cushioning material having the above-described configuration, the present invention is characterized in that the opening and the rib are formed on the side support portion.

  In the pulp mold cushioning material having the above-described configuration, the present invention provides a protrusion protruding from the inner surface of one of the side surface support portion and the bottom surface support portion, and the protrusion portion of the side surface support portion and the bottom surface support portion. And a thin-walled portion that can be broken and penetrated by the protruding portion.

  The pulp mold cushioning material of the present invention is characterized in that a dimension in the longitudinal direction of the side support part is shorter than a dimension in the longitudinal direction of the bottom support part.

  According to the 1st structure of this invention, the usage-amount of a pulp mold material can be reduced compared with the former by forming an opening part in the flat part which does not contact with a to-be-packaged item, and the weight reduction of a buffering material. Contributes to cost reduction. In addition, by making the cross section of the rib formed between the opening and the outer edge of the flat portion stepped, the rigidity in the direction perpendicular to the longitudinal direction of the rib is increased, so that the bending or bending of the rib is effective. Can be suppressed.

  Moreover, according to the 2nd structure of this invention, in the pulp mold shock absorbing material of the said 1st structure, in the vicinity of the base end part of a rib, the inclination which becomes an upward slope from the center side of a rib toward a base end part By providing the portion, the load in the vertical direction is distributed over the entire inclined portion, so that the base end portion can be reliably prevented from being bent or torn.

  Moreover, according to the 3rd structure of this invention, in the pulp-mold buffer material of the said 1st or 2nd structure, the side surface support part which supports the side surface of a to-be-packaged object, and the bottom face of a to-be-packaged object are supported. Since it was set as the structure which connected the bottom surface support part with the hinge part, the bulkiness at the time of storage can be suppressed, maintaining a buffering performance.

  Further, according to the fourth configuration of the present invention, in the pulp mold cushioning material of the third configuration, the cushioning performance is obtained by forming the opening and the rib on the side support portion on which the load of the packaged item is difficult to be applied. It is possible to reduce the weight and cost of the cushioning material without lowering the thickness.

  According to the fifth configuration of the present invention, in the pulp mold cushioning material of the third or fourth configuration, the thin portion is formed by the protrusion formed on either the side surface support portion or the bottom surface support portion. By breaking and penetrating, the cushioning material can be easily maintained in a folded state, so that packing workability is improved.

  According to the sixth configuration of the present invention, in the pulp mold cushioning material of the third or fourth configuration, the dimension in the longitudinal direction of the side surface support portion is shorter than the dimension in the longitudinal direction of the bottom surface support portion. By doing so, the opening of the side support part due to the restoring force of the hinge part is regulated by the side face of the outer box, so that it is possible to easily arrange the cushioning material inside the outer box without folding a lock mechanism. Become. In addition, when the side support part is provided with openings and ribs, the side support part is not pressurized when the cushioning material is press-fitted and arranged in the outer box. It can prevent more reliably.

The top view of the cushioning material made from a pulp mold which concerns on 1st Embodiment of this invention. Side view of the pulp mold cushioning material of the first embodiment Sectional drawing of the pulp mold cushioning material of 1st Embodiment (AA 'cross section of FIG. 1) Sectional drawing which shows the state which assembled the pulp mold cushioning material of 1st Embodiment, and has arrange | positioned in an outer box. The cross-sectional enlarged view of the rib formed in the buffer material made from pulp mold of 1st Embodiment The perspective view of the rib periphery formed in the buffer material made from pulp mold of 1st Embodiment The top view of the cushioning material made from a pulp mold which concerns on 2nd Embodiment of this invention. Sectional drawing which shows the state which has arrange | positioned the cushion material made from a pulp mold of 2nd Embodiment in the outer box.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a plan view of a pulp mold cushioning material according to a first embodiment 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 are not in contact with the protruding portion 5 that contacts the package object and the package object according to the outer shape of the package object and the required pressure strength. A flat portion 6 is formed.

  Convex portions 7a and 7b are formed at two positions on the left and right sides of the inner surface of the bottom support portion 4, and projecting portions 8a and 8b project from the upper surfaces of the convex portions 7a and 7b. Concave portions 9a and 9b are formed on the inner surface of the side support portion 3 at positions facing the convex portions 7a and 7b when the hinge portion 2 is bent. The bottom surfaces of the concave portions 9a and 9b are thin-walled portions 10a and 10b. ing. The protrusions 8a and 8b and the thin portions 10a and 10b function as a lock mechanism for holding the side surface support portion 3 and the bottom surface support portion 4 in a folded state.

  In addition, at the substantially central portion of the cushioning material 1, a rectangle that extends from between the protrusions 5 (flat portion 6) formed on the left and right sides of the side support portion 3 to the flat portion 6 of the bottom support portion 4 across the hinge portion 2. An opening 11 having a shape is formed, and the left and right sides of the side support 3 are connected by ribs 13 formed between the opening 11 and the outer edge of the side support 3.

  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 (left side in FIG. 1) of the cushioning material 1 is exactly the same. The side support part 3 has a substantially trapezoidal shape in side view, and the bottom support part 4 has a substantially triangular shape in side view. First side surfaces 3 a are provided at both longitudinal ends of the side support part 3, and the longitudinal direction of the bottom support part 4 Second reference surfaces 4a are provided at both ends. The convex portion 7a protrudes in a mountain shape from the second reference surface 4a, and the concave portion 9a is recessed from the first reference surface 3a in substantially the same shape as the convex portion 7a.

  FIG. 4 is a view showing a state in which the cushioning material 1 of the first embodiment is folded in half by the hinge portion 2 from the state of FIG. 3. 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 into the concave part 9a while pushing through the thin part 10a, thereby preventing the side support part 3 and the bottom 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 the object to be packed is placed in accordance with the shape of the protrusion 5 and the flat part 6 (see FIG. 1).

  Since the opening part 11 is formed in the substantially center part of the side surface support part 3 and the bottom face support part 4 with which the buffer material 1 of this embodiment does not hit the object to be packed, the use of a pulp mold material is used as compared with the conventional case. The amount can be reduced, contributing to weight reduction and cost reduction of the cushioning material.

  By the way, the size of the cushioning material 1 in the longitudinal direction (left-right direction in FIG. 1) is formed slightly larger than the inner size of the outer box 100. And the movement of the buffer material 1 in the outer box 100 is regulated by arranging the buffer material 1 in the outer box 100 in a press-fit manner during the packing operation.

  However, when the opening 11 is provided to the vicinity of the outer edge of the side support portion 3 in order to reduce the amount of the pulp mold material used as much as possible, the rib 13 becomes thinner by that amount, so the strength of the rib 13 is weakened, and the cushioning material 1 There was a problem that the yield at the time of molding was reduced, and the ribs 13 were easily bent at the time of transporting the cushioning material 1 and packing work. In particular, when the rib 13 is bent inward when the buffer material 1 is press-fitted into the outer box 100, the rib 13 and the packaged object interfere smoothly when the packaged material is placed on the buffer material 1. May not be able to work.

  Therefore, in the cushioning material 1 of the present embodiment, as shown in FIG. 5, the cross section of the rib 13 is stepped. With this configuration, the rigidity in a direction perpendicular to the longitudinal direction of the ribs 13 is increased, so that bending and bending of the ribs 13 can be effectively suppressed.

  Further, at the base end portion 15 of the rib 13 (see FIG. 1), the load in the vertical direction is likely to be concentrated on the corner (corner), so that the base end portion due to the concentrated load is increased only by increasing the rigidity of the rib 13. There is a possibility that 15 bends and tears may occur. Therefore, as shown in FIG. 6, an inclined portion 17 is provided in the vicinity of the base end portion 15 of the rib 13 so as to rise upward from the center side of the rib 13 toward the base end portion 15. With this configuration, since the load in the vertical direction is distributed over the entire inclined portion 17, the base end portion 15 can be reliably prevented from being bent or torn.

  In the above-described embodiment, the cross section of the rib 13 has a two-stage structure including the lower step portion 13a and the upper step portion 13b. However, the rib 13 may have three or more steps. Further, the lower step portion 13a may be provided on both sides of the upper step portion 13b. Further, in FIG. 6, the inclined portion 17 is provided in the upper step portion 13b, but the inclined portion 17 may be provided in the lower step portion 13a, or may be provided in both the lower step portion 13a and the upper step portion 13b. What is necessary is just to set arbitrarily also about the height of the lower step part 13a or the upper step part 13b, and the inclination of the inclination part 17 according to the specification of the shock absorbing material 1, the rigidity requested | required of the rib 13, etc. FIG.

  FIG. 7 is a plan view of a pulp mold cushioning material according to a second embodiment of the present invention. In this embodiment, the locking mechanism including the protrusions 8a and 8b and the thin portions 10a and 10b is not provided, and the dimension L1 in the longitudinal direction of the side support part 3 is larger than the dimension L2 in the longitudinal direction of the bottom support part 4. Designed to be short. Since the configuration of the other parts is the same as that of the first embodiment, description thereof is omitted.

  Also in the shock absorbing material 1 of 2nd Embodiment, the opening part 11 is formed in the approximate center part of the side surface support part 3 and the bottom face support part 4, and weight reduction and cost reduction are aimed at. Moreover, the rib 13 has a stepped cross section, and the inclined portion 17 is provided in the vicinity of the base end portion 15 of the rib 13, whereby the rib 13 can be effectively prevented from being bent or bent.

  And since the dimension L1 of the side surface support part 3 was made shorter than the dimension L2 of the bottom surface support part 4, when the shock-absorbing material 1 is press-fitted and arranged in the outer box 100 as shown in FIG. The pressure from the outer box 100 is not applied. Thereby, the bending of the rib 13 at the time of packing work can be prevented more reliably.

  In addition, since the dimension L2 of the bottom support part 4 is slightly larger than the inner dimension of the outer box 100, the movement of the cushioning material 1 in the outer box 100 is restricted, and the side support by the restoring force of the hinge part 2 is performed. The opening of the part 3 is regulated by the side surface 100 a of the outer box 100. Therefore, the cushioning material 1 can be easily arranged in a state in which the cushioning material 1 is folded inside the outer box 100 without providing a lock mechanism.

  In addition, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the spirit of the present invention. For example, in each of the above embodiments, the cushioning material 1 in which the side surface support portion 3 and the bottom surface support portion 4 are connected via the hinge portion 2 has been described as an example. The same applies to the cushioning material.

  INDUSTRIAL APPLICABILITY The present invention can be used for a pulp mold cushioning material formed from a pulp-based material using a mold by a pulp mold molding method.

DESCRIPTION OF SYMBOLS 1 Buffer material 2 Hinge part 3 Side surface support part 3a 1st reference surface 4 Bottom support part 4a 2nd reference surface 5 Protrusion part 6 Flat part 7a, 7b Protrusion part 8a, 8b Protrusion part 9a, 9b Concave part 10a, 10b Thin part 11 Opening portion 13 Rib 13a Lower step portion 13b Upper step portion 15 Base end portion 17 Inclined portion 100 Outer box

Claims (6)

It is formed using a mold from a pulp-based material by a pulp mold molding method,
A protrusion that contacts the packaged item;
A non-contact flat part extending between the protrusions,
An opening formed in the flat portion;
A rib having a stepped cross section formed between the opening and the outer edge of the flat portion;
Pulp mold cushioning material comprising   2. The pulp mold cushioning material according to claim 1, wherein an inclined portion having an upward slope from the center side of the rib toward the base end portion is provided in the vicinity of the base end portion of the rib.   The protrusion and the flat part are formed into a side support part that supports the side surface of the object to be packed, and a bottom surface support part that is foldably connected to the side surface support part via a hinge part and supports the bottom surface of the object to be packed. The pulp mold cushioning material according to claim 1 or 2, wherein the cushioning material is made of pulp mold.   The pulp mold cushioning material according to claim 3, wherein the opening and the rib are formed in the side support portion. A protrusion protruding from the inner surface of one of the side surface support portion and the bottom surface support portion;
The thin-walled portion that is formed on a portion of the side surface support portion and the bottom surface support portion that is opposed to the protrusion portion and can be broken and penetrated by the protrusion portion. Pulp mold cushioning material.   The size of the longitudinal direction of the said side surface support part is shorter than the dimension of the longitudinal direction of the said bottom surface support part, The cushioning material made from pulp mold of Claim 3 or Claim 4 characterized by the above-mentioned.

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