JP5158090B2 - Packing container - Google Patents

Description

  The present invention relates to a packing container for an object to be packed. In the present application, a hard disk drive (HDD) built in a computer will be described as an example of an object to be packed.

Technical background

  Since the HDD built in the computer is fragile, it has been conventionally stored in a plastic packaging container and packed in cardboard. The packaging container is made of, for example, PET, and the lower case and the upper case are engaged with each other.

  In addition, an impact mitigating member that mitigates the impact is also known. Patent Document 1 discloses a buffer in which a first buffer is sandwiched between a pair of second buffers. A 1st buffer is arrange | positioned at the corner of a to-be-packaged object, and is comprised from the hard elastic member which is a polymer of a polystyrene and polyethylene. The second buffer is made of a soft elastic member made of expanded polypropylene. Patent Document 2 discloses a multi-layered shock absorber having an elastic buffer disposed on the side to which an impact force is applied and a brittle buffer disposed adjacent to the elastic buffer. The elastic buffer is configured by covering a sponge with a rubber sheet, and the brittle buffer is configured by protecting foamed urethane with an iron cover.

There exists patent document 3 as another prior art.
Japanese Patent Laid-Open No. 11-59736 (paragraph 0021, FIG. 1) JP-A-8-284994 (paragraph 0010, FIG. 1) Japanese Utility Model Publication No. 5-72779

  In recent years, HDDs have become more accurate and more dense, and have become so weak that even a small impact can cause an abnormality. For example, an impact at the time of taking out a packaging container from cardboard and placing it on a table can also cause damage. For this reason, it is preferable to attach an impact relaxation member to the packaging container. However, conventional impact mitigating members are not always effective.

  Accordingly, an object of the present invention is to provide a packaging container that effectively protects an object to be packed from external impact.

Packaging container according to one aspect of the present invention is a packaging container having a plastic housing for accommodating the object to be packed, and the shock absorbing member having a multilayer structure is fixed to the housing, wherein the housing The body has a protruding portion that protrudes to the outside and has a hollow portion therein, and the shock absorbing member is disposed in the hollow portion of the protruding portion, and the multilayer structure of the shock absorbing member includes the shock absorbing member. A first elastic member that prevents deformation of the first elastic member, and a second elastic member that is provided on the opposite side of the package with respect to the first elastic member, and that relieves vibration to the housing, the rather long than the length of the first elastic member in the stacking direction of the multilayer structure the length of the second elastic member in the stacking direction of the multilayer structure, the first elastic member, said from the hollow portion Projecting into the housing, the second elastic member is From serial hollow portion and wherein the do not want to project into the housing. Such a packaging container has a large deformation due to the impact relaxation member having a multilayer structure cushioning an external impact and the length of the first elastic member in the stacking direction of the multilayer structure being longer than the length of the second elastic member. Prevent too much. Further, it is possible to prevent the first elastic member and the second elastic member from being easily separated.

  The first elastic member is a first rubber member having a rubber hardness of 30 to 40, and the second elastic member has a rubber hardness lower than that of the first elastic member and a rebound resilience of 5%. It is the 2nd rubber member which has the above 15% or less. For example, when the casing is placed on a table, the soft second rubber member reduces external impact, and the hard first rubber member collides with the table directly due to the deformation of the second rubber member. To prevent. When the rubber hardness of the first rubber member is less than 30, the function of preventing the deformation of the second rubber member is degraded. When the rubber hardness of the first rubber member is greater than 40, the impact force applied to the packaged product is increased. If the coefficient of restitution of the second rubber member is larger than 15%, the function of absorbing the impact is lowered. When the coefficient of restitution of the second rubber member is less than 5%, the amount of deformation increases. Rubber hardness can be measured with a durometer.

  The plastic is made of, for example, polyethylene terephthalate (PET). The first rubber member is made of, for example, silicon rubber, natural rubber, or urethane rubber. The second rubber member is made of, for example, butyl rubber, nitrile rubber, polyurethane rubber, or styrene butadiene rubber.

When the stacked length of the multilayer structure is L, the length in the stacking direction of the first rubber member as L _1, the length in the stacking direction of the second rubber member and L _2, L ₁ + L ₂ = L, L ₁ may be 0.7 L or more and 0.9 L or less, and L ₂ may be 0.1 L or more and 0.3 L or less. When the length of the first rubber member is smaller than 0.7L, the deformation preventing function is reduced, and when the length is larger than 0.9L, the effect of vibration relaxation by the second rubber member is reduced. When the length of the second rubber member is less than 0.1 L, the effect of vibration relaxation is reduced, and when the length is greater than 0.3 L, the deformation becomes too large.

  The housing includes a pair of a lower case and an upper case that house the article to be packed therein, and the impact relaxation member may be fixed to each of the lower case and the upper case at at least three places or at four corners. Good. Since three points constitute a surface, three places stabilize the posture of the housing. The four corners stabilize the posture when the casing has a rectangular surface.

The housing has a protrusion that protrudes to the outside and has a hollow portion inside, and the impact mitigating member is disposed in the hollow portion of the protrusion, and the first rubber member in the stacking direction of the multilayer structure. If the length is L _1, the first rubber member may protrude by 0.1 L ₁ or 0.3 L ₁ less the interior of the housing from the hollow portion of the protrusion. The amount of projection of the first rubber member is likely to fall off and more than 0.3 L _1, deformation preventing function when an impact is reduced becomes smaller than 0.1 L _1. Further, the second rubber member does not protrude into the housing. This is because the first rubber member and the second rubber member are easily separated at the boundary when protruding.

  Further objects and other features of the present invention will become apparent from the preferred embodiments described below with reference to the accompanying drawings.

It is a top view in the state where the packing container as one example of the present invention was developed. It is sectional drawing of the packaging container shown in FIG. It is a perspective view which shows the state which accommodated HDD which is a to-be-packaged object in the packing container shown in FIG. It is a perspective view of the front side of the state which folded the packing container shown in FIG. It is a perspective view of the back side of the state which folded the packing container shown in FIG. It is a schematic sectional drawing of the impact relaxation member of the packaging container shown in FIG.

  Hereinafter, a packaging container 1 according to an embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a plan view of a state in which the packaging container 1 is developed. FIG. 2 is a cross-sectional view of the packaging container 1.

  The packaging container 1 includes a casing that stores an object to be packed, and an impact relaxation member 40 that is fixed to the casing and relaxes an external impact applied to the object to be packed.

  The housing is a plastic (PET) housing that houses the HDD, and includes a lower case 10, an upper case 20, and a connection portion 30. However, the present embodiment does not limit the structure of the housing.

The lower case 10 includes an edge portion 11, an engaging portion 12, and sections 13 to 16. Projection 12 from the edge 11 in the direction Z ₁ toward the inner surface from the outer surface of the lower case 10 protrudes, protrusion 12 is engaged is inserted in the upper case 20 on the side which projects from the edge 11. As shown in FIG. 1, the projecting portion 12 extends around the lower case 10 and includes a pair of narrow portions 12 a and a pair of corrugated portions 12 b. Section 13 protrudes in a direction Z ₂ toward the outer surface from the inner surface of the lower case 10. The protruding amount is slightly larger than the thickness of the HDD. The area of the section 13 is slightly wider than the outer shape of the HDD. The section 13 supports and holds the periphery of the bottom of the HDD. Section 14 is further protruded in the _{Z 2} direction than the section 13. Section 15 is further protruded in the _{Z 2} direction than the section 14. Section 16 is further protruded in the _{Z 2} direction than the section 15. The lower case 10 maintains rigidity by such an uneven shape.

The upper case 20 includes an edge portion 21, an engagement portion 22, and sections 23 to 26. Protrusion 22 from the edge 21 in a direction Z ₂ toward the inner surface to the outer surface of the upper case 20 protrudes, the protrusion 22 engages the inserted projection 12. As shown in FIG. 1, the protrusion 22 extends around the upper case 20 and includes a pair of narrow portions 22 a and a pair of corrugated portions 22 b. Section 23 protrudes _{Z 2} direction than projection 22. Section 24 is further protruded in the _{Z 2} direction than the section 23. Section 25 has a substantially cylindrical shape, and further protrudes Z ₂ direction than the section 24. Section 26 is further protruded in the _{Z 2} direction than the section 25. The upper case 20 maintains rigidity due to such an uneven shape.

The connecting portion 30 enables the upper case 20 to rotate in the C direction shown in FIG. 2 with respect to the lower case 10. FIG. 3 is a perspective view showing a state in which the HDD is housed in the housing shown in FIG. From the state shown in FIG. 3 when the upper case 20 in the C ₁ direction is folded by rotating the lower case 10 in the state shown in FIG. When the upper case 20 is deployed by rotating the C ₂ direction from the state becomes a state shown in FIG. If FIG. 4 is turned over, it will be in the state shown in FIG. FIG. 4 is a front perspective view of the packaging container 1 in a folded state. FIG. 5 is a rear perspective view of the packaging container 1 in a folded state.

FIG. 6 is a schematic cross-sectional view of the impact relaxation member 40. The impact relaxation member 40 is fixed to the housing and has a multilayer structure. The multilayer structure includes a first rubber member 41 and a second rubber member 45. In the packaging container 1, the impact reducing member 40 reduces external impact.

The first rubber member 41 has a rubber hardness measured by a durometer of 30 to 40. When the rubber hardness of the first rubber member 41 is less than 30, the function of preventing the deformation of the second rubber member is lowered. When the rubber hardness of the first rubber member 41 is greater than 40, the impact force applied to the packaged product is increased. The 1st rubber member 41 (1st elastic member) is comprised from either silicone rubber, natural rubber, or urethane rubber, for example.

The second rubber member 45 is provided on the opposite side of the package with respect to the first rubber member 41, has a rubber hardness lower than that of the first rubber member, and has a rebound resilience of 5% or more and 15% or less. When the casing is placed on the table, the soft second rubber member 45 mitigates the external impact, and the hard first rubber member 41 directly collides with the table due to the deformation of the second rubber member 45. To prevent that. If the coefficient of restitution of the second rubber member 45 is greater than 15%, the function of absorbing the impact is degraded. When the coefficient of restitution of the second rubber member 45 is less than 5%, the amount of deformation increases. The second rubber member 45 (second elastic member) is made of, for example, butyl rubber, nitrile rubber, polyurethane rubber, or styrene butadiene rubber.

The length in the stacking direction LD of the multilayer structure is L, the length in the stacking direction LD of the first rubber member 41 and L _1, the length in the stacking direction LD of the second rubber member 45 and L _2. Then, L ₁ + L ₂ = L, L ₁ is 0.7 L or more and 0.9 L or less, and L ₂ is 0.1 L or more and 0.3 L or less. L ₁ is reduced small and the deformation preventing function than is 0.7 L, the larger than 0.9L the effect of vibrational relaxation by the second rubber member 45 decreases. L ₂ is reduced the effect of the vibrational relaxation to less than 0.1 L, the deformation becomes too large larger than 0.3 L.

The housing is composed of a pair of a lower case 10 and an upper case 20 that accommodates an object to be packed therein, and the impact mitigating member 40 is fixed to each of the lower case 10 and the upper case 20 in at least three places or four corners. The Since three points constitute a surface, three places stabilize the posture of the housing. The four corners stabilize the posture when the casing has a rectangular surface. In the present embodiment, the lower case 10 is arranged at four of the four corners of the six sections 16. In the upper case 20, the four sections of the twelve sections 25 are arranged at four corners. These sections 16 and 25 are protrusions that protrude to the outside and have a hollow portion inside the housing, and the impact relaxation member 40 is disposed in the hollow portion of the protrusion. As shown in FIG. 6, the first rubber member 41 protrudes into the housing by L ₁₁ from the hollow portion of the protrusion. L ₁₁ is 0.1 L ₁ or 0.3 L ₁ less. L ₁₁ is liable to fall off from the hollow portion first rubber member 41 exceeds 0.3 L _{1, L 11} is deformation preventing function at the time of impact is reduced becomes smaller than 0.1 L _1. The first rubber member 41 is disposed only L ₁₂ in the hollow portion of the protrusion. L ₁₂ is L ₁ -L ₁₁ . The second rubber member 45 does not protrude into the housing. This is because the first rubber member 41 and the second rubber member 45 are easily separated at the boundary I when protruding.

  The HDD incorporates a 3.5 inch or 2.5 inch magnetic disk and has a printed circuit board on the back surface. The present invention does not limit the diameter of the magnetic disk.

  Even if the packaging container 1 is taken out from the cardboard and placed on the table, the impact relaxation member 40 protects the HDD from external impact. As a result, damage to the HDD can be prevented.

  As mentioned above, although the Example of this invention was described, this invention is not limited to these Examples, A various deformation | transformation and change are possible within the range of the summary.

Industrial applicability

  ADVANTAGE OF THE INVENTION According to this invention, the packaging container which protects a to-be-packaged item from an external impact effectively can be provided.

Claims (5)

A packaging container having a plastic casing for storing an object to be packed and an impact relaxation member fixed to the casing and having a multilayer structure,
The housing has a protruding portion that protrudes outside and has a hollow portion inside,
The impact buffer member is disposed in the hollow portion of the protrusion,
The multilayer structure of the shock absorbing member is:
A first elastic member for preventing deformation of the impact mitigating member; and a second elastic member provided on the opposite side of the packaged object with respect to the first elastic member and for mitigating vibration to the housing the a, said second elastic member length of the first elastic member in the stacking direction of the multilayer structure in the stacking direction of the multilayer structure rather long than the length,
The first elastic member protrudes from the hollow portion into the housing,
It said second elastic member, packaging container, characterized in that do not want to project into the housing from the hollow portion.   The packaging container according to claim 1, wherein the first elastic member is made of any one of silicon rubber, natural rubber, and urethane rubber.   The packaging container according to claim 1, wherein the second elastic member is made of any one of butyl rubber, nitrile rubber, polyurethane rubber, and styrene butadiene rubber. The housing is composed of a pair of a lower case and an upper case that house the article to be packed inside,
The packaging container according to claim 1, wherein the impact relaxation member is fixed to each of the lower case and the upper case in at least three places. The housing is composed of a pair of a lower case and an upper case that house the article to be packed inside,
The packaging container according to claim 1, wherein the impact relaxation member is fixed to each of the lower case and the upper case at at least four corners.