PACKING BODY

A packing body includes a bottom plate on which a packed body is placed, a box body that covers the packed body, and a restricting member, of which one end is fixed to the bottom plate and the other end protrudes toward a part of the packed body with a gap and that restricts lateral movement of the packed body by coming into contact with the part of the packed body in a case where the packed body has moved laterally, in which clearance between the restricting member and the part of the packed body is larger than a gap between an inner surface of the box body and the packed body, and the clearance is defined as a movement amount obtained by adding an elastic deformation amount of the restricting member in a case where the packing body has received a horizontal impact to the gap between the restricting member and the part of the packed body.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is based on and claims priority under 35 USC 119 from Japanese Patent Application No. 2021-048576 filed Mar. 23, 2021.

BACKGROUND

(i) Technical Field

The present invention relates to a packing body.

(ii) Related Art

There is known a heavy object packing device including a pallet, a heavy object that has a storage chamber in a cabinet placed on the pallet, a corrugated outer box that covers the heavy object, and a band that couples the outer box and the pallet to each other. In the heavy object packing device, the pallet and the heavy object are connected to each other by a connecting fitting, the heavy object and the outer box are fixed to each other by a mounting fitting fixed to the heavy object and a fastening bolt screwed with the mounting fitting, and a washer having a protrusion protruding toward an outer box side is interposed between the bolt and the outer box (JP1995-149348A).

There is also known a pallet including columnar girder members, the plurality of girder members being provided to be arranged in parallel with each other at an interval in one direction, a reinforcing member that consists of corrugated paper, the reinforcing member having a rectangular base part, to which the plurality of girder members are fixed, and two reinforcing wall parts, which are connected to the base part and rise perpendicularly to the base part from each of sides of the base part perpendicular to a longitudinal direction of the girder members, and a recessed deck part that consists of corrugated paper, the deck part having a rectangular bottom part fixed to the base part while overlapping the base part and a first wall part, which rises perpendicularly to the bottom part from each of the sides of the bottom part perpendicular to the longitudinal direction of the girder members and to which the two reinforcing wall parts are fixed respectively (JP2019-156478A).

SUMMARY

Aspects of non-limiting embodiments of the present disclosure relate to a packing body that does not have a buffer material between the packing body and a packed body, and prevents an impact on the packed body at the time of transporting.

According to an aspect of the present disclosure, there is provided a packing body including a bottom plate on which a packed body is placed, a box body that covers the packed body, and a restricting member, of which one end is fixed to the bottom plate and the other end protrudes toward a part of the packed body with a gap and that restricts lateral movement of the packed body by coming into contact with the part of the packed body in a case where the packed body has moved laterally, in which clearance between the restricting member and the part of the packed body is larger than a gap between an inner surface of the box body and the packed body, and the clearance is defined as a movement amount obtained by adding an elastic deformation amount of the restricting member in a case where the packing body has received a horizontal impact to the gap between the restricting member and the part of the packed body.

DETAILED DESCRIPTION

Next, the present invention will be described in more detail with reference to the drawings by giving an exemplary embodiment and a specific example below, but the present invention is not limited to the exemplary embodiment and the specific example.

In addition, in the description using the drawings below, it is to be noted that the drawings are schematic, the ratio of each dimension is different from the actual ratio, and members that are not necessary for the description to facilitate understanding will not be shown as appropriate.

(1) Configuration of Packing Body

FIG. 1is an overall perspective view showing the outline of a packing form using a packing body10according to the present exemplary embodiment.FIG. 2is a perspective view showing the outline of a pallet20of the packing body10according to the present exemplary embodiment.FIG. 3is an exploded perspective view of a box body30.FIG. 4Ais a perspective view showing the outline of a restricting member40, andFIG. 4Bis a view for describing elastic deformation of the restricting member40. Hereinafter, an overall configuration and the packing form of the packing body10will be described with reference to the drawings.

The packing body10consists of the pallet20, the box body30, and the restricting member40. As shown inFIG. 1, in a state where the lateral movement of a packed body100is restricted by the restricting member40and is placed on the pallet20, the packed body100is packed by being covered with the box body30. InFIG. 1, in order to show the packed body100, the box body30covering the packed body100is shown by a broken line.

The pallet20according to the present exemplary embodiment is an example of a bottom plate, and is configured by, for example, a wooden bottom plate member21that forms a bottom surface, a wooden girder member22configured by a plurality of vertical girders and horizontal girders provided on the bottom plate member21, and a wooden top plate member23that is provided on the girder member22and forms a top surface, as shown inFIG. 2. Positioning members24that position a lower end part of the box body30are provided at four corners of the top plate member23.

The box body30is configured by a quadrangle tubular body part31that consists of a corrugated sheet and a lid part32that closes an opening31aprovided in an upper part of the body part31.

The body part31has a size that allows a relatively heavy electronic device including a caster101to be accommodated, which is the packed body100, and a lower end part and an upper end part thereof are opened. In a state where the packed body100is placed on the pallet20, the body part passes so as to wrap the packed body100from the opening31ain a lower part and is positioned on the top plate member23of the pallet20by the positioning members24.

The lid part32is a lid that closes an opening31bin the upper end part of the body part31that is passed through and covers the packed body100, and is formed by a corrugated sheet.

Hereinafter, the box body30will be referred to as the box body30without distinguishing between the body part31and the lid part32.

The restricting member40is a sheet metal plate member that can deform elastically, and has a base part41fixed on the top plate member23of the pallet20and a hook part42that enters a hole111(seeFIG. 4B) provided in a bottom surface of the packed body100and presses floating of the packed body100from the pallet20, as shown inFIG. 4A. As shown inFIG. 4B, in a case where an external force F is applied in a horizontal direction, the restricting member40is capable of deforming elastically. The restricting member40is formed of high strength steel as a material.

(2) Packing Form of Packed Body

FIG. 5is a schematic cross-sectional view showing the packing form of the packed body100using the packing body10.FIGS. 6A and 6Bare partially enlarged views for describing the placement of the packed body100on the pallet20by the restricting member40.FIG. 12is a schematic cross-sectional view showing the packing form of the packed body100using a packing body200of a comparative example, which has a buffer pad PD.FIG. 13is a schematic cross-sectional view showing behavior of the packed body100at the time of a horizontal impact on the packing body200of the comparative example, which has the buffer pad PD.

As shown inFIG. 12, the packing body200according to the comparative example prevents lateral skidding of the packed body100at the time of transportation as the restricting member40restricts lateral movement of the lower end part of the packed body100placed on the pallet20and the buffer pad PD arranged between the packed body100and the box body30restricts lateral movement of the upper end part. On the other hand, the size of the packing body200(shown by a width W1inFIG. 12) increases by the thickness of the buffer pad PD, and there is a possibility that loading efficiency declines.

As shown inFIG. 13, in a case where a horizontal impact is received by the packing body200in which the buffer pad PD is arranged, the impact on the packed body100is received only by the buffer pad PD. Thus, there is also a possibility that the impact is intensively received by the upper end part of the packed body100, on which the buffer pad PD is arranged, as shown by arrows in the drawing, so that the packed body100is damaged.

As shown inFIG. 5, in the packing body10according to the present exemplary embodiment, the lateral movement of the lower end part of the packed body100placed on the pallet20is restricted by the restricting member40, and the buffer pad PD is not arranged between the packed body100and the box body30at the upper end part. A gap G1(seeFIG. 6A) between the packed body100and the box body30is smaller than the comparative example having the buffer pad PD. Therefore, in a case where an impact is received in the horizontal direction, impact energy is received by the pallet20and the box body30.

As shown inFIG. 6A, at the lower end part of the packed body100, the restricting member40fixed to the top plate member23of the pallet20has entered the hole111provided in a base body110, which is the bottom surface of the packed body100, restricting the lateral movement of the packed body100.

Specifically, clearance between the restricting member40and the hole111of the base body110of the packed body100is larger than the gap G1between an inner surface30aof the box body30and the packed body100. Herein, the clearance refers to the amount of a space or a distance at which two objects can move relatively. In the present example, the clearance is clearance between the hole111and the restricting member40, and is the amount of a distance at which the base body110having the hole111can move with respect to the restricting member40in a case where the packing body10has received an impact in the horizontal direction and has moved laterally. That is, the clearance is an amount obtained by adding an elastic deformation amount δ of the restricting member40in a case where the packed body100has moved horizontally and an edge111aof the hole111has come into contact with the restricting member40to a gap G2between the hole111and the restricting member40.

As shown inFIG. 4B, the restricting member40is fixed to the top plate member23of the pallet20by a screw, and can deform elastically in the horizontal direction with the base part41as a base point in a case of receiving an impact force in the horizontal direction. For example, in the present exemplary embodiment, the restricting member40is likely to deform elastically in the horizontal direction in a case of receiving the impact force in the horizontal direction as the gap G2between the hole111and the restricting member40, which is obtained by subtracting the plate thickness t of the restricting member40from a width L1of the hole111, is set to 6.8 mm (gap on one side is 3.4 mm), the gap G1between the inner surface30aof the box body30and the packed body100is set to 5 mm, and the plate thickness t of the restricting member40is set to 1.6 mm, which is smaller than the plate thickness (2.3 mm) of the base body110, as shown inFIG. 6A.

Specifically, in a case where the packing body10accommodating the packed body100has collided in the horizontal direction at a speed of 4.8 km/h, the elastic deformation amount δ of the restricting member40is 1.6 mm or more. As schematically shown inFIG. 6B, the packed body100moves horizontally without lateral movement thereof being restricted by the restricting member40on the pallet20, and the entire surface of the packed body100comes into surface-contact with the inner surface30aof the box body30.

(3) Impact Absorption of Packing Body

FIG. 7is a view showing a horizontal impact test of the packing body10.FIG. 8is a graph showing an elastic deformation amount of the restricting member40in the horizontal impact test.FIG. 9is a graph showing contact of the packed body100to the inner surface30aof the box body30in the horizontal impact test.FIG. 10is a view showing a state where the packed body100has moved horizontally on the pallet20and has come into contact with the inner surface30aof the box body30in a case where the horizontal impact test has been performed.FIG. 11is a view showing the behavior of the packed body100in a case where a packing body300of a comparative example, in which the restricting member40does not deform elastically, has received an impact force in the horizontal direction.

The horizontal impact test shown inFIG. 7has been performed on the packing body10according to the present exemplary embodiment, and the impact absorption of the packing body10has been evaluated.

Since the packing body10according to the present exemplary embodiment described above includes, on a bottom surface side, the pallet20having the wooden girder member configured by the plurality of vertical girders and horizontal girders between the bottom plate member21and the top plate member23, transport by a forklift is possible.

At the distribution stage, for example, in a warehouse, the packing body10is transported in a state of being horizontally held by the forklift, is abutted against a wall surface to be aligned, and is stacked. At this time, there is a possibility that an end part of the pallet20and a side surface of the box body30receive an impact in the horizontal direction, and the packed body100is inclined on the pallet20and receives a partially large impact.

EXAMPLE

As shown inFIG. 7, the horizontal impact test has been performed under a method of fixing the packing body10that has packed the packed body100, which is covered with the box body30in a state where the packing body is placed on the pallet and lateral movement thereof is restricted by the restricting member40, to a sliding base50by a belt (not shown), and causing the sliding base50to slide in the horizontal direction at a speed of 4.8 km/h to collide with a pedestal60. In the horizontal impact test, the packing body10is subject to a speed change of 4.8 km/h in the horizontal direction.

FIG. 8shows a relationship between the elastic deformation amount δ (mm) of the restricting member40and time, in a case where the horizontal impact test has been performed under the method shown inFIG. 7. Although the elastic deformation amount of one restricting member40, among the four restricting members40fixed on the pallet20, is shown inFIG. 8, any one of the other three restricting members40has the same elastic deformation amount.

InFIG. 8, for approximately 0.008 sec (see A in the graph) after the collision, the packed body100moves horizontally within a range of the gap G2of the hole111and does not come into contact with the restricting member40, and the restricting member40does not deform elastically. Then, as the edge111aof the hole111formed at the base body110of the packed body100comes into contact with the restricting member40with the horizontal movement of the packed body100, the restricting member40deforms elastically by approximately 16 mm at approximately 0.03 sec (see B in the graph) after the collision, and after then, the deformation amount of the restricting member40decreases with the elapse of time.

That is, in a case where the pallet20on which the packed body100is placed has collided in the horizontal direction at a predetermined speed (4.8 km/h in the horizontal direction), the elastic deformation amount5of the restricting member40in the horizontal direction is larger than the movement amount of the packed body100in the horizontal direction.

FIG. 9shows a relationship between a change in a distance between the lower end part and the upper end part of the packed body100and the inner surface30aof the box body30and time, in a case where the horizontal impact test has been performed under the method shown inFIG. 7. InFIG. 9, a distance between the upper end part of the packed body100and the inner surface30aof the box body30decreases for approximately 0.025 sec (see A in the graph) after the collision, a distance between the lower end part of the packed body100and the inner surface30aof the box body30decreases for approximately 0.027 sec (see B in the graph) after the collision, and a time difference is 0.002 sec (2 msec). That is, the upper end part and the lower end part of the packed body100collide with the inner surface30aof the box body30with a time difference of 10 msec or less.

As described above, in a case where the pallet20on which the packed body100is placed has collided in the horizontal direction at a predetermined speed (4.8 km/h in the horizontal direction), a timing when the upper end part of the packed body100comes into contact with the inner surface30aof the box body30is earlier than a timing when the lower end part of the packed body100comes into contact with the inner surface30aof the box body30.

FIG. 11shows the behavior of the packed body100in a case of receiving an impact force in the horizontal direction in the packing body300of the comparative example, in which the restricting member40does not deform elastically in a case where the packed body100has moved horizontally and the edge111aof the hole111has come into contact with the restricting member40.

In a case where the restricting member40does not deform elastically, as shown inFIG. 11, the packed body100moves horizontally on the pallet20only by the gap G2between the restricting member40and the hole111of the packed body100, the upper end part is inclined with a contact part between the restricting member40and the hole111as a base point, and a partially large impact is received as shown by an arrow in the drawing.

FIG. 10shows a state where the packed body100has moved horizontally on the pallet20and has come into contact with the inner surface30aof the box body30, in a case where the horizontal impact test has been performed under the method shown inFIG. 7.

In the packing body10of the present exemplary embodiment, by making the clearance between the restricting member40and the hole111of the packed body100larger than the gap G1between the inner surface30aof the box body30and the packed body100, the packed body100moves laterally on the pallet20without being restricted by the restricting member40, and the entire surface of the packed body100comes into surface-contact with the inner surface30aof the box body30as shown by arrows in the drawing.

(4) Workings and Effects of Packing Body

In the packing body10according to the present exemplary embodiment, the clearance between the restricting member40and the hole111of the base body110of the packed body100is larger than the gap G1between the inner surface30aof the box body30and the packed body100. The clearance includes the elastic deformation of the restricting member40in a case where the packed body100has moved horizontally and the edge111aof the hole111has come into contact with the restricting member40. In a case of receiving a horizontal impact, the packed body100moves horizontally on the pallet20at least by the amount of the clearance and is surface-abutted against the box body30.