JP5371892B2 - Pulp mold cushioning material - Google Patents

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, a cushioning material for packing, which uses waste paper as a material and is formed into a desired shape by a pulp molding method, has begun to be widely used. The cushioning material for packing formed by this pulp mold molding method has the advantage that it is inexpensive to dispose of, is less likely to cause pollution and environmental pollution, and can be recycled.

  The above packing cushioning material is, for example, after cutting used collected recovered paper, putting water and chemicals into melted raw material into a female mold, putting a male mold in it and draining it in vacuum By drying, a product formed into a desired shape can be obtained. 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, it is forged so that there is no void 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 molding method similar to molding.

  By the way, in the conventional cushioning material made of pulp mold, by sufficiently securing the depth (buffer stroke) from the position where the impact is applied to the packed object, or by increasing the receiving area of the product support surface, The buffering property was improved. 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.

  Therefore, in order to effectively absorb the impact force applied from the outside without increasing the volume of the buffer material, for example, Patent Document 1 discloses a first support formed by bending a part of the integrally formed buffer material. A cushioning material made of pulp mold is disclosed in which the two surfaces of the product are supported by the portion and the second support portion, and the bulkiness during storage is suppressed while maintaining the buffer performance.

JP 2009-57086 A

  In the conventional pulp mold cushioning material as shown in Patent Document 1, a cushioning material is provided by providing a convex portion on the skid (lower box) side on which the product is placed and engaging with the concave portion on the pulp mold cushioning material side. Was positioning. However, in this method, it is necessary to affix a member to be a convex portion at a predetermined position of the skid, which leads to an increase in the cost of the skid due to an increase in the number of members and manufacturing processes. In addition, the convex portion attached to the skid may be damaged or dropped during transportation.

  On the other hand, a method of providing a convex part (protrusion) on the pulp mold cushioning material side and a concave part (positioning hole) on the skid side is also conceivable, but it is difficult to provide a convex part on the back surface depending on the production process of the pulp mold. There was also a risk of quality problems.

  In view of the above-described problems, an object of the present invention is to provide a pulp mold cushioning material that can easily form positioning protrusions that engage with positioning holes on the skid side.

  In order to achieve the above-mentioned object, the present invention is formed by using a mold from a pulp-based material by a pulp mold molding method, and a side support part that supports a side surface of an object to be packed, and a bottom surface support that supports the bottom surface of the object to be packed A hinge portion that foldably connects the side surface support portion and the bottom surface support portion, a protrusion that projects from the inner surface of the side surface support portion over the hinge portion to the bottom surface support portion side, and An opening formed in a portion where the protrusions face each other, and the protrusion is inserted into the opening, and the side surface support portion and the bottom surface support portion are held in a bent state by the engagement between the protrusion and the opening. In addition, the protrusion is a pulp mold cushioning material in which the protrusion protrudes downward from the lower end portion of the bottom surface support portion.

  Further, the present invention provides the pulp mold cushioning material having the above-described configuration, wherein the protrusion has a tapered insertion portion that becomes narrower from the proximal end portion toward the distal end portion, and the proximal end portion includes the opening. A stepped portion that engages with the opening edge is provided.

  In the pulp mold cushioning material having the above-described configuration, the opening width of the opening portion is narrower than the width of the base end portion of the insertion portion and wider than the width of the distal end portion. Yes.

  In the pulp mold cushioning material having the above-described configuration, the present invention is characterized in that a groove portion is formed in the insertion portion from the base end portion to the tip end portion.

  In the pulp mold cushioning material having the above-described configuration, the present invention is characterized in that a chamfered portion is formed at the tip portion of the insertion portion.

  Further, the present invention is the pulp mold cushioning material of the above configuration, wherein the side surface support portion and the bottom surface support portion each have a reference surface that contacts when bent along the hinge portion, the protrusion is The opening is engaged with the reference surface in contact.

  According to the first configuration of the present invention, the protrusion protruding from the inner surface of the side surface support portion toward the bottom surface support portion side and the opening formed at the portion where the protrusion of the bottom surface support portion faces each other engages the cushioning material. Since the protrusion protrudes downward from the lower end portion of the bottom surface support portion in the bent state, the cushioning material can be positioned only by forming a positioning hole on the skid side. Therefore, it is possible to reduce the member for forming the positioning convex portion and the member attaching step, and it is possible to reduce the cost of the skid. Further, since there is no possibility that the convex portion is damaged when the skid is delivered, the inspection work at the time of delivery can be simplified. Furthermore, since the side surface support portion and the bottom surface support portion are held in a bent state and at the same time, protrusions can be formed on the contact surface with the skid, and there is no need to provide a separate process for forming the protrusions. An increase in cost can also be avoided.

  Further, according to the second configuration of the present invention, in the pulp mold cushioning material of the first configuration, the protrusion has a tapered insertion portion that becomes narrower from the proximal end portion toward the distal end portion, Since the base end portion is provided with a step portion that engages with the opening edge of the opening portion, the side support portion and the bottom surface support portion are securely held in a bent state by the engagement between the step portion and the opening edge of the opening portion. Can do.

  Moreover, according to the 3rd structure of this invention, since the opening width of an opening part is narrower than the width | variety of the base end part of an insertion part in the pulp-mold cushioning material of the said 2nd structure, a level | step-difference part and an opening part It is possible to reliably engage with the opening edge. Moreover, since the opening width of the opening is wider than the width of the tip of the insertion portion, the insertion portion can be easily introduced into the opening when the side surface support portion and the bottom surface support portion are bent.

  Moreover, according to the 4th structure of this invention, in the pulp-mold cushioning material of the said 3rd structure, a plug part forms a groove part by forming a groove part from the base end part of a plug part to a front-end | tip part. Since it becomes deformable in the crushing direction, the insertion portion can be easily inserted into the opening.

  Further, according to the fifth configuration of the present invention, in the pulp mold cushioning material of any one of the second to fourth configurations, the chamfered portion is formed at the distal end portion of the insertion portion, whereby the side support portion and When the bottom support portion is bent along the hinge portion, the insertion portion can be more easily introduced into the opening portion.

  According to the sixth configuration of the present invention, in the pulp mold cushioning material of any one of the first to fifth configurations, the side surface support portion and the bottom surface support portion are each bent along the hinge portion. Since the protrusions engage with the openings in a state where the reference surfaces are in contact with each other, the cushioning material can always be bent into a certain shape and maintained in that shape.

The top view of the buffer material made from pulp mold concerning one embodiment of the present invention Side view of cushioning material viewed from the right in FIG. Partial enlarged view around the protrusion 7a in FIG. Partial enlarged view of the periphery of the protrusion 7a viewed from the right in FIG. Partial enlarged view of the periphery of the protrusion 7a as viewed from below in FIG. The side view which shows the state which folded the shock absorbing material in the hinge part from the state of FIG. 6 is a partially enlarged view of the periphery of the protrusion 7a viewed from the left in FIG. 6 when the cushioning material is folded in half at the hinge portion. Side view showing a state in which the cushioning material folded in half is arranged on the upper surface of the skid The side view which shows the other structural example of the cushioning material made from pulp mold of this invention The side view which shows the state which folded the shock absorbing material in the hinge part from the state of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a plan view showing a configuration example of a pulp mold cushioning material of the present invention, and FIG. 2 is a side view seen from the right direction of FIG. The cushioning material 1 is integrally formed from a pulp-based material by a pulp molding method, and includes a side surface support portion 3 that supports a side surface of an object to be packed (not shown), and a bottom surface support portion 4 that supports the bottom surface of the object to be packed. Are connected via a hinge part 2 so as to be bendable.

  The side surface support portion 3 and the bottom surface support portion 4 have a shell shape (hollow shape). First side surfaces 3 a are provided at both longitudinal ends of the side surface support portion 3, and second longitudinal ends of the bottom surface support portion 4 are second. A reference surface 4a is provided. Further, projecting mounting portions 5a and 5b that come into contact with an object to be packed and flat portions 6a and 6b that are not in contact with the object to be packed are formed. The placement parts 5a and 5b have complex irregularities (not shown) according to the outer shape of the packaged object and the required pressure strength.

  Protrusions 7a and 7b are formed at two places on the left and right sides of the flat part 6a on the side support part 3 so as to straddle the hinge part 2, and the flat part 6b on the bottom support part 4 side faces the protrusions 7a and 7b. Openings 9a and 9b are formed at the positions.

  3 is a partially enlarged view of the periphery of the protrusion 7a in FIG. 1, and FIGS. 4 and 5 are partially enlarged views of the periphery of the protrusion 7a as viewed from the right direction and the downward direction in FIG. In the following description, only the configuration around the protrusion 7a formed on the right side of the cushioning material 1 will be described, but the configuration around the projection 7b formed on the left side of the cushioning material 1 is exactly the same. Further, in FIG. 5, the opening 9a is indicated by hatching.

  As shown in FIGS. 3 to 5, the protrusion 7 a includes an insertion portion 10 that protrudes beyond the hinge portion 2 to the flat portion 6 b side, and a fixing portion 11 that is fixed to the flat portion 6 a side. The insertion portion 10 has a tapered shape that becomes narrower from the proximal end portion 10a toward the distal end portion 10b, and a stepped portion 12 is formed in the proximal end portion 10a. A groove portion 13 is formed in the center of the insertion portion 10 from the base end portion 10a to the distal end portion 10b in a direction orthogonal to the hinge portion 2, and a chamfered portion 14 is formed on the upper surface of the distal end portion 10b of the insertion portion 10. Has been.

  The opening 9 a is formed in a rectangular shape with one side along the hinge portion 2. The opening width L of the opening 9a is designed to be narrower than the width w1 of the base end portion 10a of the insertion portion 10 and wider than the width w2 of the distal end portion 10b.

  Next, a method for assembling the cushioning material of the present invention will be described. When the side surface support portion 3 and the bottom surface support portion 4 are bent along the hinge portion 2 from the state of FIG. 2, the insertion portion 10 of the protrusion 7a faces the opening portion 9a. Here, the width w2 of the distal end portion 10b of the insertion portion 10 is narrower than the width L of the opening portion 9a, and the chamfered portion 14 is formed at the distal end portion 10b, so that the insertion portion 10 can be easily formed in the opening portion 9a. Can be introduced.

  When the hinge portion 2 is further bent, the width of the insertion portion 10 gradually increases toward the base end portion 10a, so that the side surface of the insertion portion 10 and the opening edge of the opening portion 9a interfere with each other. Since the groove portion 13 is formed, the insertion portion 10 is press-fitted into the opening portion 9a while being deformed so as to crush the groove portion 13.

  And when the insertion part 10 is completely inserted in the opening part 9a to the base end part 10a, the 1st reference surface 3a of the side surface support part 3 and the 2nd reference surface 4a of the bottom face support part 4 contact | abut. Moreover, since the groove part 13 is restored to its original shape and the width w1 of the base end part 10a is wider than the width L of the opening part 9a, the step part 12 engages with the opening edge of the opening part 9a.

  6 is a side view showing a state in which the cushioning material 1 of the present invention is folded in half by the hinge portion 2, and FIG. 7 is a leftward view of FIG. 6 showing the periphery of the protrusion 7a when the cushioning material 1 is folded in half. It is the elements on larger scale seen from. As shown in FIG. 6, when the first reference surface 3a and the second reference surface 4a come into contact with each other, the bending angle of the cushioning material 1 is regulated, and the shape of the cushioning material 1 is uniquely determined.

  Further, as shown in FIG. 7, the insertion portion 10 of the protrusion 7a enters the opening 9a, and the step portion 12 engages with the opening edge of the opening 9a, so that the side surface support portion 3 and the bottom surface support portion 4 are hinged. Opening to the original state is prevented by the restoring force of part 2. That is, the protrusion 7a and the opening 9a function as a lock mechanism for holding the side surface support portion 3 and the bottom surface support portion 4 in a bent state. Further, the protrusion 7 a protrudes below the lower end portion 4 b of the bottom surface support portion 4.

  The cushioning material 1 bent in this way is arranged on the upper surface of the skid, and the article to be packed is placed in accordance with the shape of the placing portions 5a and 5b (see FIG. 1). FIG. 8 is a side view showing a state in which the cushioning material of the present invention is disposed on the upper surface of the skid.

  In the cushioning material 1 of the present invention, since the protrusion 7a (and the protrusion 7b) protrudes from the contact surface (bottom surface) with the skid 20, a positioning hole 21 that engages with the protrusions 7a and 7b is formed at a predetermined position of the skid 20. By forming it, the cushioning material 1 can be positioned easily. Moreover, since it is not necessary to form a convex part on the skid 20 side as in the prior art, a member for forming the convex part and a member attaching process can be reduced, and the cost of the skid 20 can be reduced. It becomes. In addition, since there is no possibility that the convex portion is broken or dropped when the skid 20 is delivered, the inspection work at the time of delivery can be simplified.

  Further, the cushioning material 1 of the present invention can hold the side surface support portion 3 and the bottom surface support portion 4 in a bent state, and at the same time, can form protrusions on the contact surface with the skid 20, so there is no need to provide a separate step for forming the protrusions. Further, it is possible to avoid a decrease in assembly workability and an increase in cost of the cushioning material 1 itself.

  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 protrusions 7a and 7b are provided on the flat portion 6a of the side surface support portion 3, and the openings 9a and 9b are provided on the flat portion 6b of the bottom surface support portion 4. However, as shown in FIGS. Further, the projections 7 a and 7 b can be provided on the first reference surface 3 a of the side surface support portion 3, and the openings 9 a and 9 b can be provided on the second reference surface 4 a of the bottom surface support portion 4.

  9 and 10 also, the shapes and dimensions of the protrusions 7a and 7b and the openings 9a and 9b are the same as those in the above embodiment, but the openings 9a and 9b are formed on the inclined surfaces, and thus the protrusion 7a. 7b may be formed obliquely according to the inclination of the openings 9a and 9b.

  Further, the amount of protrusion of the protrusions 7a and 7b from the lower end portion 4b of the bottom surface supporting portion 4 is not particularly limited as long as it can be engaged with the positioning hole 21 of the skid 20 and positioned.

  INDUSTRIAL APPLICABILITY The present invention can be used for a pulp mold cushioning material that is formed from a pulp-based material using a mold by a pulp mold molding method and is used by being folded in half at a hinge portion.

DESCRIPTION OF SYMBOLS 1 Buffer material 2 Hinge part 3 Side support part 3a 1st reference surface 4 Bottom support part 4a 2nd reference surface 4b Lower end part 5a, 5b Mounting part 6a, 6b Flat part 7a, 7b Protrusion 9a, 9b Opening part 10 Insertion part 10a Base end portion 10b Tip end portion 11 Fixing portion 12 Stepped portion 13 Groove portion 14 Chamfered portion 20 Skid 21 Positioning hole

Claims (3)

It is formed using a mold from a pulp-based material by a pulp mold molding method,
A side support for supporting the side of the packaged item;
A bottom support portion for supporting the bottom surface of the object to be packed;
A hinge portion that connects the side surface support portion and the bottom surface support portion in a foldable manner;
A protrusion protruding from the inner surface of the side surface support portion to the bottom surface support portion side beyond the hinge portion;
An opening that is formed in a portion of the bottom surface support portion where the protrusions face each other and into which the protrusions are inserted,
The protrusion has a taper-shaped insertion portion that becomes narrower from the base end portion toward the tip end portion, and the base end portion is provided with a stepped portion that engages with an opening edge of the opening portion. The opening width of the part is narrower than the width of the base end part of the insertion part and wider than the width of the tip part,
In the insertion part, a groove part is formed from the base end part to the tip part,
Due to the engagement between the protrusion and the opening, the side surface support portion and the bottom surface support portion are held in a bent state, and the protrusion protrudes downward from the lower end portion of the bottom surface support portion. Pulp mold cushioning material. 2. The pulp mold cushioning material according to claim 1, wherein a chamfered portion is formed at the tip of the insertion portion . The side surface support portion and the bottom surface support portion each have a reference surface that contacts when bent along the hinge portion, and the protrusion engages with the opening in a state in which the reference surface is in contact. molded pulp made cushioning material according to claim 1 or claim 2, characterized in that.

Images