Lead-acid battery transport structure

Abstract

To prevent a lead storage battery from being damaged due to falling during transportation, when transporting the lead storage battery as a transportation object.SOLUTION: A transportation structure 1 of a lead storage battery 10 comprises, according to a packing box 20 in which the lead storage battery 10 is packed, the packing box 20 having an upper wall part 23 formed by two flaps 24A, 24B extending from two opposite first side wall parts 21 of the packing box 20, and a tip portion 26 of at least one flap 24 folded and inserted into the packing box 20, and an upper side cushioning body 42A arranged outside the upper wall part 23, the upper side cushioning body 42A provided with an upper wall part 51 opposed to the upper wall part 23. When the packing box 20 falls while a face 10A of the lead storage battery 10, opposed to the upper wall part 23 of the packing box 20, is facing downward, the falling impact is buffered by the tip portion 26 of the flap 24 getting sandwiched between the lead storage battery 10 and the upper wall part 51 and squeezed.SELECTED DRAWING: Figure 15

Description

[Technical field]

[0001] The technology disclosed in this specification relates to a transport structure for a lead-acid battery. [Background technology]

[0002] Conventionally, when transporting an object to be transported, cushioning materials are placed around the object to protect it from impacts during transport (see, for example, Patent Document 1). Specifically, the packaging structure described in Patent Document 1 comprises a bottom box made of corrugated cardboard, lower cushioning materials stored on both sides of the bottom box and receiving both lower ends of the main body of the packaged object (corresponding to the object to be transported), upper cushioning materials placed against both upper ends of the main body of the packaged object received by the lower cushioning materials, and a main box made of corrugated cardboard with an open bottom end for covering all of the above. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2005-313942 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, there has been room for improvement in the past in terms of cushioning the impact when an object to be transported is dropped during transportation. This specification discloses a technique for preventing lead-acid batteries from falling and being damaged during transportation when the lead-acid batteries are transported as objects to be transported. [Means for solving the problem]

[0005] A transport structure for a lead-acid battery comprising: a packaging box in which a lead-acid battery is packed, the packaging box having a second wall portion formed by two flaps extending from two opposing first wall portions of the packaging box, and a tip portion of at least one of the flaps being folded and inserted inside the packaging box, and a cushioning body arranged on the outside of the second wall portion, the cushioning body having a third wall portion opposing the second wall portion, wherein when the packaging box is dropped with a surface of the lead-acid battery opposing the second wall portion facing downward, the tip portion of the flap is crushed by being pinched between the lead-acid battery and the third wall portion, thereby cushioning the impact of the drop. Effect of the Invention

[0006] When a lead-acid battery is transported as the item to be transported, the lead-acid battery can be prevented from falling and being damaged during transport. [Brief description of the drawings]

[0007] [Figure 1] FIG. 1 is a perspective view of a lead-acid battery according to a first embodiment; [Diagram 2] A perspective view of a packaging box in which a lead-acid battery is packed [Diagram 3] Perspective view of the packaging box [Figure 4] Cross-section of the packaging box [Diagram 5] Cross-section of the packaging box [Figure 6] Perspective view of the shipping box [Figure 7] Partial cross-sectional view of the transport structure of a lead-acid battery (cross-sectional view of line BB shown in FIG. 11) [Figure 8] Schematic diagram showing the form of a dropped shipping box [Figure 9] A perspective view of the upper buffer body from above [Figure 10] A perspective view of the upper buffer body from below. [Figure 11] Top view of upper cushion [Figure 12A] Schematic diagram showing the state in which the upper cushioning body is placed on the packaging box [Figure 12B]FIG. 12B is a schematic diagram showing the upper buffer shown in FIG. 12A rotated 180 degrees around a line perpendicular to the paper surface; [Figure 13] Cross-sectional view of line AA shown in Figure 11 [Figure 14A] Side view of the short side of the upper cushion [Figure 14B] Side view of the long side of the upper cushion [Figure 15] Cross-section of a box that has fallen on its top [Figure 16] Cross-section of a box that has fallen on its top [Figure 17] FIG. 13 is a perspective view of a lid member of a lead-acid battery according to another embodiment; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] (Outline of this embodiment) (1) According to one aspect of the present invention, a transport structure for a lead-acid battery includes a packaging box in which a lead-acid battery is packed, the packaging box having a second wall portion formed by two flaps extending from two opposing first wall portions of the packaging box, with a tip portion of at least one of the flaps folded and inserted inside the packaging box, and a cushioning body arranged on the outside of the second wall portion, the cushioning body having a third wall portion opposing the second wall portion, wherein when the packaging box is dropped with the lead-acid battery facing the second wall portion facing downward, the tip portion of the flap is crushed by being pinched between the lead-acid battery and the third wall portion, thereby cushioning the impact of the drop.

[0009] According to the above-mentioned structure for transporting lead-acid batteries, the tip portion of the flap is folded and inserted inside the packaging box, so that if the packaging box is dropped with the lead-acid battery facing the second wall of the packaging box facing downward, the tip portion of the flap is crushed by being pinched between the lead-acid battery and the third wall, thereby cushioning the impact of the drop. Therefore, according to the above-mentioned structure for transporting lead-acid batteries, when the lead-acid battery is transported as an object to be transported, it is possible to prevent the lead-acid battery from falling and being damaged during transport.

[0010] (2) According to one aspect of the present invention, the third wall portion has a protruding portion that protrudes toward the second wall portion, and at least a portion of the tip portion of the flap may overlap the protruding portion when viewed from a direction perpendicular to the wall surface of the third wall portion.

[0011] According to the above-described transport structure for lead-acid batteries, at least a portion of the tip of the flap overlaps with the protrusion when viewed from a direction perpendicular to the wall surface of the third wall portion, so that the tip is crushed by being pinched between the lead-acid battery and the protrusion, thereby cushioning the impact of the drop.

[0012] (3) According to one aspect of the present invention, the entire tip portion of the flap may overlap the protruding portion when viewed from a direction perpendicular to the wall surface of the third wall portion.

[0013] According to the above-mentioned transport structure for lead-acid batteries, the entire tip of the flap overlaps with the protruding portion when viewed from a direction perpendicular to the wall surface of the third wall portion, so that the impact of a fall is more reliably cushioned than when only a portion of the tip of the flap overlaps with the protruding portion.

[0014] (4) According to one aspect of the present invention, the protruding portion may have a hollow on a surface side opposite to a surface facing the second wall portion.

[0015] According to the above-mentioned structure for transporting a lead-acid battery, the protruding portion is hollow on the side opposite to the side facing the second wall, so that if the packaging box is dropped with the lead-acid battery facing the second wall of the packaging box facing downward, the protruding portion pressed downward by the lead-acid battery through the tip of the flap is likely to bend downward. Therefore, the protruding portion also functions as a cushion to absorb shock. This further reduces the shock of the drop. Furthermore, in the above-described transport structure for lead-acid batteries, the protruding portion has a hollow on the side opposite to the side facing the second wall, so that when viewed from the protruding portion as a reference, the portion of the buffer other than the protruding portion forms a recess that is recessed on the side opposite to the second wall. The recess collapses when it receives an impact, so the impact of the drop is further cushioned.

[0016] (5) According to one aspect of the present invention, a terminal is provided on a surface of the lead-acid battery facing the second wall portion, and the terminal and the protruding portion do not have to overlap when viewed from a direction perpendicular to the wall surface of the third wall portion.

[0017] According to the above-mentioned transport structure for lead-acid batteries, when the packaging box is dropped with the surface of the lead-acid battery facing the second wall facing downward, the second wall is pressed downward by the terminal. At this time, since the terminal and the protruding portion do not overlap when viewed from a direction perpendicular to the wall surface of the third wall, a recess in the buffer body is located below the terminal. Therefore, the second wall pressed downward by the terminal functions as a cushion by bending downward using the space of the recess. This buffers the impact on the terminal and distributes the impact over the entire second wall of the packaging box. This makes it possible to prevent the impact from concentrating on the terminal and causing the terminal to be damaged.

[0018] (6) According to one aspect of the present invention, the terminal is provided on either side of the short side of the lead-acid battery based on the center of the short side of the lead-acid battery, when viewed from a direction perpendicular to the wall surface of the third wall portion, or on either side of the long side of the lead-acid battery based on the center of the long side of the lead-acid battery, and the terminal and the protrusion do not have to overlap even if the buffer is rotated 180 degrees around a straight line perpendicular to the wall surface of the third wall portion.

[0019] For example, a terminal is provided on one side of the short side of a lead-acid battery with respect to the center of the short side. Even if the terminal and the protruding portion do not overlap when the buffer is placed in a certain orientation in the packaging box, the terminal and the protruding portion overlap when the buffer is rotated 180 degrees around a straight line perpendicular to the wall surface of the third wall. In this case, when placing the buffer, the worker needs to pay attention to the orientation of the buffer so that the terminal and the protruding portion do not overlap, which reduces workability. According to the above-mentioned structure for transporting lead-acid batteries, even if the buffer body is rotated 180 degrees around a straight line perpendicular to the wall surface of the third wall portion, the terminals and the protruding portion do not overlap, so the worker does not need to pay attention to the orientation of the buffer body when placing it. This improves workability.

[0020] (7) According to one aspect of the present invention, a width of a tip portion of the flap in a direction perpendicular to a wall surface of the third wall portion may be wider than a width of the terminal in the perpendicular direction.

[0021] If the width of the tip of the flap in a direction perpendicular to the wall surface of the third wall is wider than the width of the terminal in the perpendicular direction, the lead-acid battery will come into contact with the tip of the flap and the tip will begin to collapse before the terminal comes into contact with the second wall, and damage to the terminal can be more reliably prevented than if the width of the tip of the flap in the perpendicular direction is the same as or narrower than the width of the terminal.

[0022] (8) According to one aspect of the present invention, the packaging box may have a frame-shaped fourth wall portion that is connected to an outer peripheral edge portion of the third wall portion and surrounds the packaging box, and a frame-shaped fifth wall portion that is connected to the fourth wall portion and surrounds the fourth wall portion, and a space may be provided between the fourth wall portion and the fifth wall portion.

[0023] The packaging box has a wall portion (for example, a first wall portion) that is connected to the second wall portion at a right angle. When the packaging box is dropped, the wall portion that is connected to the second wall portion at a right angle may fall on the bottom. According to the above-mentioned transport structure for lead-acid batteries, a space is provided between the fourth wall and the fifth wall, so that when the wall connected at a right angle falls on its bottom, the fifth wall flexes using the space between it and the fourth wall (or the fourth wall flexes using the space between it and the fifth wall), thereby functioning as a cushion to absorb the shock applied to the lead-acid battery. Therefore, it is possible to absorb the shock when the wall connected at a right angle falls on its bottom.

[0024] (9) According to one aspect of the present invention, the third wall portion and the fourth wall portion may be recessed so as to be spaced apart from corners of the packaging box.

[0025] When a packing box falls, it may become tilted and hit the floor from a corner. When a corner hits the floor, the impact is concentrated at the corner of the lead-acid battery, and the shock cannot be absorbed by the cushioning material, which may damage the lead-acid battery. This issue has not been sufficiently considered in the past. According to the above-mentioned transport structure for lead-acid batteries, the third wall and the fourth wall are recessed so as to be spaced apart from the corners of the packaging box, so that it is possible to prevent the concentration of impact on the corners of the lead-acid battery when the battery is dropped onto the floor from the corners, thereby reducing the possibility of the lead-acid battery being damaged due to the concentration of impact on the corners.

[0026] (10) According to one aspect of the present invention, the buffer body may be made of molded pulp.

[0027] If a lead-acid battery is dropped, the lead-acid battery may be damaged and the electrolyte may leak out. As a result of extensive research, the inventors of the present application have found that if the buffer is made of pulp mold, even if the electrolyte leaks out, the leaked electrolyte can be absorbed to a certain extent by the buffer. According to the above-mentioned transport structure for lead-acid batteries, since the buffer body is made of pulp mold, even if the electrolyte leaks, the electrolyte can be absorbed to some extent by the buffer body made of pulp mold. Therefore, according to the above-mentioned transport structure for lead-acid batteries, if the lead-acid battery is dropped and damaged during transport, the electrolyte can be more reliably prevented from leaking.

[0028] <Embodiment 1> The first embodiment will be described with reference to Figures 1 to 16. In the following description, the up-down direction, the left-right direction, and the front-rear direction are based on the up-down direction, the left-right direction, and the front-rear direction shown in Figure 1. In the following description, the reference numerals in the drawings may be omitted for the same components, with some exceptions.

[0029] (1)Lead acid battery A lead-acid battery 10 according to a first embodiment will be described with reference to Fig. 1. The lead-acid battery 10 is a lead-acid battery for starting an engine that is mounted on an automobile and supplies power to an engine starting device (a starter motor). The use of the lead-acid battery 10 is not limited to engine starting, but it can also be used for idling stop vehicles, as an auxiliary battery for starting a hybrid system, or for other uses.

[0030] The lead-acid battery 10 is rectangular when viewed from above. The lead-acid battery 10 includes a synthetic resin battery case 11 that is open at the top, and a synthetic resin cover member 12 that closes the opening of the battery case 11. The battery case 11 contains a group of electrodes and an electrolyte. Two terminals 13 (a positive electrode external terminal 13P and a negative electrode external terminal 13N) protruding upward are provided on the upper surface of the cover member 12. A positive electrode of the electrode plate group is connected to the positive electrode external terminal 13P, and a negative electrode of the electrode plate group is connected to the negative electrode external terminal 13N.

[0031] The two terminals 13 are disposed apart from each other in the long side direction of the lead-acid battery 10 in a top view, and are disposed on either side in the short side direction (the front side in the example shown in FIG. 1) with reference to the center in the short side direction of the lead-acid battery 10. The lid member 12 is formed with a gas vent hole 14 for venting gas generated inside the lead-acid battery 10. An upper surface 10A of the lead-acid battery 10 is a surface facing an upper wall portion 23 (an example of a second wall portion) of a packaging box 20 (see FIG. 2) described later.

[0032] (2) Transport structure of lead-acid batteries As shown in Fig. 2, a lead-acid battery 10 for replacing a lead-acid battery installed in an automobile is packed and sold in a packaging box 20 (an example of an inner box). The packaging box 20 is made of cardboard and is formed into a rectangular parallelepiped shape having four side walls 21, a bottom wall 22 (see Fig. 4) and an upper wall 23 (an example of a second wall). The side walls 21 are an example of a wall continuing at a right angle to the second wall.

[0033] 3, flaps 24 (24A, 24B, 24C, 24D) extend from the upper sides of the four side wall portions 21. Of the four flaps 24, two flaps 24A and 24B extending from the side wall portion 21 (an example of a first side wall portion) having a larger width in the horizontal direction form the upper wall portion 23 of the packaging box 20. These two flaps 24A and 24B have a portion 25 forming the upper wall portion 23 and a tip portion 26 continuing to the tip portion of the portion 25 forming the upper wall portion 23, and the tip portion 26 is bent at approximately 90 degrees. Of the four flaps 24, flaps 24C and 24D extending from side wall portion 21 having a narrower width in the horizontal direction have a slit 24E extending in the left-right direction formed at a position slightly shifted forward from approximately the center in the front-to-rear direction.

[0034] 4 and 5, the tip portion 26 bent approximately 90 degrees passes through slits 24E formed in the flaps 24C and 24D and is inserted into the packaging box 20. The lower end of the tip portion 26 inserted into the packaging box 20 is located slightly above the upper surface 10A of the lead-acid battery 10. 4 and 5, the width of tip portion 26 of flap 24 in the vertical direction is wider than the width of terminal 13 in the vertical direction. The width of tip portion 26 in the vertical direction may be the same as the width of terminal 13 in the vertical direction, or may be narrower than the width of terminal 13 in the vertical direction.

[0035] As shown in Fig. 6, when the replacement lead-acid batteries 10 are transported by air freight or the like, the packaging boxes 20 in which the lead-acid batteries 10 are packed are each housed in an individual transport box 30 and transported. The transport box 30 is also made of cardboard.

[0036] As shown in FIG. 7 , the transport structure 1 for the lead-acid battery 10 includes a packaging box 20 in which the lead-acid battery 10 is packed, a vinyl inner bag 41, two cushioning bodies 42 arranged above and below, a granular absorbent material 43, a vinyl outer bag 44, and a transport box 30. The packaging box 20 is housed in the transport box 30 while being placed in the inner bag 41. The inner bag 41 is intended to prevent electrolyte from leaking out of the transport box 30 in the event that the lead-acid battery 10 is tilted during transport and electrolyte leaks from the gas vent hole 14, or that the lead-acid battery 10 is damaged by the impact of being dropped during transport and electrolyte leaks. The opening of the inner bag 41 is folded and secured with adhesive tape.

[0037] The two buffers 42 are intended to absorb shock when the transport box 30 falls due to load collapse during transport or the like. The two buffers 42 have the same shape. One of the two buffers 42 is disposed on the lower side of the packaging box 20 placed in the inner bag 41. The other buffer 42 is disposed on the upper side of the packaging box 20 placed in the inner bag 41. In the following explanation, the buffer 42 disposed on the upper side is referred to as upper buffer 42A, and the buffer 42 disposed on the lower side is referred to as lower buffer 42B. The specific configuration of the buffers 42 will be described later.

[0038] The granular absorbent material 43 is for absorbing the leaked electrolyte when the electrolyte leaks from the lead-acid battery 10 and leaks out of the inner bag 41. The granular absorbent material 43 is, for example, mica crushed into granules. The granular absorbent material 43 is not limited to mica and can be appropriately selected. As will be described in detail later, the lower buffer 42B has a recess 60 that is recessed downward. The absorbent material 43 is also accommodated in the recess 60 of the lower buffer 42B.

[0039] The outer bag 44 is provided to prevent the electrolyte from leaking out when the electrolyte leaks out of the inner bag 41. The opening of the outer bag 44 is folded and secured with adhesive tape.

[0040] (3) Dropping of shipping boxes The dropping of the transport box 30 will be described with reference to Fig. 8. As described above, the transport box 30 may fall due to collapse of the load during transport. The dropping of the transport box 30 may occur from the top, bottom, side, or corner.

[0041] The top-side drop is a form in which the transport box 30 falls with its top surface facing down. In other words, the top-side drop is a form in which the lead-acid battery 10 falls with its top surface 10A (the surface of the lead-acid battery 10 that faces the top wall portion 23 of the packaging box 20) facing downward. The bottom drop is a form in which the transport box 30 falls with its bottom surface facing down.

[0042] Side drop is a form in which the side of the transport box 30 falls downward. In other words, side drop is a form in which the wall portion (side wall portion 21) that is connected perpendicularly to the second wall portion (upper wall portion 23) of the packaging box 20 falls downward. The side of the transport box 30 has short sides that are narrow in the horizontal direction and long sides that are wide in the horizontal direction. Side drop can occur when the short side falls downward or when the long side falls downward. A corner drop occurs when the shipping box 30 is tilted during the drop and hits the floor from a corner. There are two types of corner drops: a drop from a lower corner of the shipping box 30 and a drop from an upper corner of the shipping box 30.

[0043] If the transport box 30 falls, the lead-acid battery 10 may be damaged by the impact of touching the ground, and the electrolyte contained therein may leak out. Drop test standards are set for marine equipment transported by aircraft or ship to ensure the safety of aircraft and ships. These standards require that the lead-acid battery 10 will not be damaged even if the transport box 30 containing the lead-acid battery 10 is dropped from a height of about 1.3 m to 1.6 m.

[0044] (4) Structure of the cushioning body The cushioning body 42 will be described with reference to Figs. 9 to 14. As described above, the upper cushioning body 42A and the lower cushioning body 42B have the same shape, so the upper cushioning body 42A will be described here as an example. For convenience, the upper cushioning body 42A is shown upside down in Figs. 9 to 11, 13, and 14. In the following description, "upper" refers to "lower" when the upper cushioning body 42A is arranged on the packaging box 20. The same is true for "lower", and refers to "upper" when the upper cushioning body 42A is arranged on the packaging box 20.

[0045] The upper cushioning body 42A is made of a pulp mold. Pulp molds include soft molds and hard molds that are harder than soft molds. The upper cushioning body 42A is made of a hard mold.

[0046] As shown in Fig. 9, the shape of the upper buffer body 42A is symmetrical front-to-back and left-right. The upper buffer body 42A has an upper wall portion 51 (an example of a third wall portion) that faces the upper wall portion 23 (second wall portion) of the packaging box 20 when the upper buffer body 42A is disposed on the packaging box 20, a substantially frame-shaped frame portion 52 that rises from the outer periphery of the upper wall portion 51, and a flange portion 53 that protrudes horizontally over the entire periphery from the frame portion 52. The inner peripheral shape of the frame portion 52 is substantially the same as the outer peripheral shape of the packaging box 20. The wall thickness of the upper wall portion 51 and the flange portion 53 is about 5 mm to 6 mm.

[0047] The upper wall 51 has a protruding portion 54 that protrudes upward (toward the upper wall 23 of the packaging box 20 when the upper cushioning body 42A is disposed on the packaging box 20). As shown in Fig. 10, the protruding portion 54 is recessed upward when viewed from below. In other words, the surface of the protruding portion 54 opposite the surface facing the upper wall 23 is hollow. The area of ​​the protruding portion 54 is preferably 50% or more and 80% or less of the area of ​​the upper wall 51.

[0048] As shown in Fig. 11, the protruding portion 54 has a first protruding portion 54A extending in the left-right direction at the center in the front-rear direction, and a second protruding portion 54B continuing to both the front and rear sides of the first protruding portion 54A. For ease of understanding, the first protruding portion 54A and the second protruding portion 54B are shown by dashed lines in Fig. 11. The first protruding portion 54A has a certain width in the front-rear direction. Specifically, the width of the first protruding portion 54A in the front-rear direction is about 1 / 3 to 1 / 4 of the width of the upper wall portion 51 in the front-rear direction.

[0049] As described above, the surface of the overhanging portion 54 opposite to the surface facing the upper wall portion 23 is hollow, and therefore, when viewed from the overhanging portion 54, the portion of the upper wall portion 51 other than the overhanging portion 54 forms a recess 60 recessed downward (toward the opposite side from the upper wall portion 23). Specifically, the recess 60 includes four first recesses 60A, two second recesses 60B, four third recesses 60C, and four fourth recesses 60D.

[0050] The four first recesses 60A are formed two on each of the front and rear sides, sandwiching the first overhanging portion 54A. The two first recesses 60A on the same side in the front-to-rear direction, sandwiching the first overhanging portion 54A, are spaced apart from each other in the left-to-right direction. Taking the left rear first recess 60A as an example, the first recess 60A has a rectangular portion 62 that is long in the left-to-right direction, and an extended portion 61 that extends from the left rear of the rectangular portion 62 to the rear side.

[0051] The two second recesses 60B are formed on both the front and rear sides of the first protruding portion 54A in the center in the left-right direction. The second recesses 60B are provided adjacent to the first protruding portion 54A. The second recesses 60B have a rectangular shape that is long in the left-right direction. The four third recesses 60C are formed in pairs on the front and rear sides of the first protruding portion 54A. Specifically, the two front third recesses 60C are provided at positions spaced forward from the first protruding portion 54A, and are spaced apart on the left and right sides of the center in the left-right direction. The same is true for the two rear third recesses 60C.

[0052] Here, a middle step 63 is formed on the front side of the two front third recesses 60C in the upper wall portion 51. The top surface of the middle step 63 is lower than the top surface of the first protruding portion 54A and higher than the bottom surface of the recess 60. A middle step 63 is similarly provided on the rear side of the two rear third recesses 60C.

[0053] The four fourth recesses 60D are formed at the inner corners of the frame portion 52, which is substantially frame-shaped when viewed from above. Recesses 65 recessed outward are formed at the four inner corners of the frame portion 52. Therefore, when the upper cushioning body 42A is placed on the packaging box 20, the upper corners of the packaging box 20 are spaced apart from both the upper wall portion 51 and the frame portion 52.

[0054] The positional relationship between the tip portion 26 of the flap 24 and the first overhanging portion 54A will be described with reference to Figs. 15 and 16. Figs. 15 and 16 show the case where the transport box 30 falls face-up. The inner bag 41, the outer bag 44, and the absorbent material 43 are omitted in Figs. 15 and 16. As shown in Fig. 15, when the transport box 30 falls face-up, the tip portion 26 of the flap 24 is located directly above the first overhanging portion 54A. More specifically, as shown in Fig. 16, the tip portion 26 is located directly above the first overhanging portion 54A over the entire width in the left-right direction. In other words, the entire tip portion 26 overlaps with the first overhanging portion 54A when viewed from the top-bottom direction (the direction perpendicular to the wall surface of the third wall portion).

[0055] The positional relationship between the two terminals 13 and the four first recesses 60A will be described with reference to Figs. 12A and 12B. For convenience, one of the two long sides of the upper buffer body 42A is long side A, and the other is long side B in Figs. 12A and 12B. As shown in Fig. 12A, the four first recesses 60A are formed at positions where the two first recesses 60A are directly above the two terminals 13 of the lead-acid battery 10 when the upper buffer body 42A is placed on the packaging box 20. In other words, the terminals 13 and the protruding portion 54 do not overlap when viewed from the top-bottom direction (an example of a direction perpendicular to the wall surface of the third wall portion).

[0056] A specific description will be given taking the left rear first recess 60A shown in FIG. 12A as an example. The left rear first recess 60A has a rectangular portion 62 and an extension portion 61 that extends from the left rear of the rectangular portion 62 to the rear side. When the upper buffer body 42A is placed on the packaging box 20, a part of the negative electrode external terminal 13N is located directly below the extension portion 61. The same is true for the positive electrode external terminal 13P. That is, the extension portion 61 is provided in the first recess 60A so that the first recess 60A is located directly above the terminal 13.

[0057] 12B shows a state in which the upper buffer body 42A is rotated 180 degrees around a vertical line (an example of a line perpendicular to the wall surface of the third wall portion) so that the long side A and the long side B are interchanged. As shown in FIG. 12B, even when the upper buffer body 42A is rotated 180 degrees, two of the four first recesses 60A are located directly above the terminals 13. In other words, when viewed from the top-bottom direction, the terminals 13 and the protruding portions 54 do not overlap with each other even when the upper buffer body 42A is rotated 180 degrees around a vertical line.

[0058] The extension portion 61 has a certain width in the long side direction of the lead-acid battery 10. This is to accommodate lead-acid batteries 10 of different sizes. Specifically, there are multiple types of lead-acid batteries 10 that differ in size in the long side direction. Lead-acid batteries 10 of different sizes have different positions of the terminals 13 in the long side direction. If the width in the long side direction of the extension portion 61 is made wider to a certain extent, the same buffer body 42 can be used for multiple types of lead-acid batteries 10 of different sizes. Therefore, the cost of the buffer body 42 can be reduced compared to when a buffer body 42 is prepared for each size of lead-acid battery 10.

[0059] With reference to Fig. 9, frame portion 52 will be described. A portion of frame portion 52 extending in the left-right direction has a central portion in the left-right direction cut out. The left-right width of the cut-out portion is approximately 1 / 3 of the left-right width of upper buffer body 42A. Similarly, a portion of frame portion 52 extending in the front-rear direction has a central portion in the front-rear direction cut out. The front-rear width of the cut-out portion is approximately 1 / 5 to 1 / 6 of the front-rear width of upper buffer body 42A.

[0060] 13, the frame portion 52 has a generally frame-shaped fourth side wall portion 70 (an example of a fourth wall portion) surrounding the packaging box 20, and a fifth side wall portion 71 (an example of a fifth wall portion) disposed outside the fourth side wall portion 70. The fifth side wall portion 71 has an upper side connected to the fourth side wall portion 70, and a space 73 is secured between the fourth side wall portion 70 and the fifth side wall portion 71.

[0061] As shown in Fig. 14A, in the portion extending in the front-rear direction of the fifth side wall portion 71, recesses 73 recessed upward from the lower end surface are formed on both front and rear sides of the center in the front-rear direction. As shown in Fig. 14B, in the portion extending in the left-right direction of the fifth side wall portion 71, recesses 74 recessed upward from the lower end surface are formed on both left and right sides of the center in the left-right direction. These recesses 73 and 74 are intended to improve the strength of the fifth side wall portion 71.

[0062] 9 and 11, a flange portion 53 is integrally formed around the entire periphery of the frame portion 52, protruding horizontally from the lower end of the outer circumferential surface of the frame portion 52. The flange portion 53 is intended to improve the strength of the upper buffer body 42A.

[0063] As described above, when the cushioning body 42 is used as the lower cushioning body 42B, the cushioning body 42 is disposed below the packaging box 20 placed in the inner bag 41. When the cushioning body 42 is used as the lower cushioning body 42B, the granular absorbent material 43 is also disposed in the recess 60 of the lower cushioning body 42B. That is, the recess 60 also serves to accommodate the absorbent material 43 when the cushioning body 42 is used as the lower cushioning body 42B.

[0064] (5) Shock absorption by cushioning 15 and 16, when the transport box 30 falls face-down, the tip portion 26 of the flap 24 of the packaging box 20 is pressed downward by the lead-acid battery 10. At this time, since the first protruding portion 54A is located directly below the tip portion 26, the tip portion 26 is pressed toward the first protruding portion 54A by the lead-acid battery 10. Here, as described above, the upper buffer body 42A is a hard mold, and the upper wall portion 51 has a wall thickness of about 5 mm to 6 mm, and therefore has a certain degree of strength. Therefore, when the lead-acid battery 10 presses the tip portion 26 toward the first protruding portion 54A, the tip portion 26 is supported from below by the first protruding portion 54A. Therefore, the tip portion 26 is sandwiched between the lead-acid battery 10 and the first protruding portion 54A and is crushed so as to buckle.

[0065] Furthermore, since the surface of the first protruding portion 54A opposite to the surface facing the upper wall portion 23 of the packaging box 20 is hollow, when the shipping box 30 falls on its top side, the first protruding portion 54A pressed downward by the tip portion 26 of the flap 24 is easily bent downward. Therefore, the first protruding portion 54A also functions as a cushion to absorb shock. Furthermore, since the recessed portion 60 of the upper buffer 42A bends so as to be crushed when it receives a shock, the recessed portion 60 also functions as a cushion to absorb shock.

[0066] Furthermore, if the transport box 30 falls face-down, the terminals 13 press the upper wall portion 23 of the packaging box 20 downward. However, since the first recess 60A of the upper buffer body 42A is located below the terminals 13, the upper wall portion 23 pressed downward by the terminals 13 bends downward by utilizing the space of the first recess 60A, thereby functioning as a cushion.

[0067] Even if the transport box 30 falls on its bottom, the recessed portion 60 bends and collapses, thereby cushioning the impact.

[0068] In the event that the transport box 30 falls sideways, the impact of the side fall is cushioned by the fourth side wall portion 70 bending toward the fifth side wall portion 71, or the fifth side wall portion 71 bending toward the fourth side wall portion 70.

[0069] In the event that the transport box 30 falls at a corner, the corner of the packaging box 20 is spaced from the cushioning body 42 by the fourth recess 60D formed in the cushioning body 42 and the recess 65 formed in the inner corner of the fourth side wall portion 70, thereby preventing the impact from being concentrated at the corner of the lead-acid battery 10.

[0070] (6) Height and strength of the cushioning If the height of the buffer body 42 is large, it is necessary to enlarge the transport box 30. On the other hand, if the height of the buffer body 42 is small, there is a risk that the buffer body 42 may not be able to sufficiently absorb impacts. Therefore, in order to sufficiently absorb impacts without enlarging the transport box 30, it is preferable that the height of the buffer body 42 is 8 mm to 15 mm.

[0071] If the strength of the buffer 42 is low, when the tip portion 26 of the flap 24 is pressed toward the first protruding portion 54A by a top-side drop, the tip portion 26 is unlikely to be crushed due to the low strength of the first protruding portion 54A, and there is a risk that the shock cannot be sufficiently cushioned. For this reason, in order for the tip portion 26 to sufficiently cushion the shock, it is preferable that the buffer 42 has a strength sufficient to crush the tip portion 26. Specifically, the strength of the buffer 42 is preferably 1000 kgf or more.

[0072] (7) Effects of the embodiment According to the transport structure 1 for the lead-acid battery 10, when the transport box 30 falls top-down, the tip portion 26 of the flap 24 is sandwiched between the lead-acid battery 10 and the upper wall portion 51 of the upper cushioning body 42A and crushed, thereby cushioning the impact of the fall. Therefore, according to the transport structure 1 for the lead-acid battery 10, when the lead-acid battery 10 is transported as an object to be transported, it is possible to prevent the lead-acid battery 10 from falling and being damaged during transport.

[0073] According to the transport structure 1 for the lead-acid battery 10, at least a part of the tip portion 26 of the flap 24 overlaps with the protrusion 54 when viewed from the top-bottom direction (the direction perpendicular to the wall surface of the third wall portion), so that the tip portion 26 is crushed by being sandwiched between the lead-acid battery 10 and the protrusion 54, thereby cushioning the impact of the drop.

[0074] According to the transport structure 1 for the lead-acid battery 10, the entire tip portion 26 of the flap 24 overlaps with the protruding portion 54 when viewed from the top and bottom, so that the impact of the drop is more reliably absorbed than when only a part of the tip portion 26 overlaps with the protruding portion 54.

[0075] According to the transport structure 1 for the lead-acid battery 10, the first protruding portion 54A is hollow on the side opposite to the side facing the upper wall portion 23 of the packaging box 20, so that the protruding portion 54 also functions as a cushion to absorb shock. This further reduces the shock of the drop. Furthermore, according to the transport structure 1 for the lead-acid battery 10, the recessed portion 60 also functions as a cushion to absorb shock, so that the shock of the drop is further reduced.

[0076] According to the transport structure 1 for the lead-acid battery 10, the upper wall portion 23 pressed downward by the terminal 13 bends downward using the space of the recess 60, thereby functioning as a cushion. This buffers the impact applied to the terminal 13, and disperses the impact over the entire upper wall portion 23 of the packaging box 20. This makes it possible to prevent the impact from concentrating on the terminal 13 and causing the terminal 13 to be damaged.

[0077] According to the transport structure 1 for the lead-acid battery 10, the width of the tip portion 26 of the flap 24 in the vertical direction is wider than the width of the terminal 13 in the vertical direction, so that the lead-acid battery 10 abuts against the tip portion 26 of the flap 24 and the crushing of the tip portion 26 begins before the terminal 13 abuts against the upper wall portion 23 (second wall portion) of the packaging box 20. Therefore, damage to the terminal 13 can be more reliably suppressed compared to a case where the vertical width of the tip portion 26 of the flap 24 is the same as or narrower than the vertical width of the terminal 13.

[0078] According to the transport structure 1 for the lead-acid battery 10, even if the upper buffer body 42A is rotated 180 degrees around the vertical line and disposed, the terminals 13 do not overlap with the protruding parts 54, so the worker does not need to pay attention to the orientation of the upper buffer body 42A when disposing the upper buffer body 42A. This improves workability.

[0079] According to the transport structure 1 for the lead-acid battery 10, when the transport box 30 falls sideways, the fifth side wall portion 71 flexes using the space 73 (or the fourth side wall portion 70 flexes using the space 73), thereby functioning as a cushion to absorb the impact applied to the lead-acid battery 10. Therefore, it is possible to absorb the impact when the transport box 30 falls sideways.

[0080] According to the transport structure 1 for the lead-acid battery 10, when the transport box 30 falls on a corner, it is possible to prevent the impact from being concentrated on the corner of the lead-acid battery 10, thereby reducing the possibility of the lead-acid battery 10 being damaged due to the impact being concentrated on the corner.

[0081] According to the transport structure 1 for the lead-acid battery 10, since the buffer body 42 is made of pulp mold, even if the electrolyte leaks, it can be absorbed to some extent by the pulp molded buffer body 42. Therefore, if the lead-acid battery 10 is dropped and damaged during transport, leakage of the electrolyte can be more reliably prevented. For example, it is possible to form a cushioning body by overlapping corrugated cardboard sheets, but because corrugated cardboard sheets have a smooth surface, there is a problem that the packaging box 20 may slip inside the shipping box 30 during transportation, making it difficult to stabilize the position. In contrast, pulp mold has a rough surface, so it has the advantage that the packaging box 20 is less likely to slip.

[0082] Generally, corrugated cardboard has sharp corners, so there is a possibility that workers may be injured when placing the cushioning material in the outer bag 44, or that the corners of the cardboard may tear the outer bag 44. Pulp molded products have fewer sharp corners than corrugated pole products, so the possibility of workers being injured or the outer bag 44 being torn can be reduced.

[0083] When forming a cushioning material by stacking corrugated board sheets, adhesive is required, but with pulp molded products, no adhesive is required and there is no need to perform the process of stacking corrugated board sheets, so it has the advantage of being cheaper to manufacture than products made from corrugated board sheets. Pulp molding is easier to mold into complex shapes than corrugated cardboard, so it has the advantage of being easier to design the shape to cushion impacts. For example, it is possible to use a polystyrene foam cushioning material, but the combustion temperature of polystyrene foam becomes high when burned, which causes problems such as premature damage to the incinerator and generation of harmful gases. On the other hand, the pulp mold cushioning material 42 has the advantage of being able to solve such problems.

[0084] <Other embodiments> The present invention is not limited to the embodiments described above and illustrated in the drawings, and the following embodiments, for example, are also included within the technical scope of the present invention.

[0085] (1) In the above embodiment, the entire tip portion 26 of the flap 24 is located directly below the first protruding portion 54A. However, the tip portion 26 may be provided only at a position that overlaps at least the terminal 13 when viewed from the front-rear direction. This is because even if the tip portion 26 is only provided at a position that overlaps the terminal 13 when viewed from the front-rear direction, it is possible to cushion the impact applied to the terminal 13 to some extent.

[0086] (2) In the above embodiment, the upper wall portion 51 (third wall portion) of the buffer body 42 has the protruding portion 54. However, the upper wall portion 51 does not have to have the protruding portion 54. In other words, the upper wall portion 51 may be flat.

[0087] (3) In the above embodiment, the first protruding portion 54A of the buffer 42 is hollow on the surface opposite to the surface facing the upper wall portion 23, but the opposite surface does not have to be hollow. In that case, the first protruding portion 54A is less likely to bend due to the presence of a floor under the first protruding portion 54A, so the strength of the buffer 42 may be lower than when the opposite surface is hollow.

[0088] (4) In the above embodiment, the packaging box 20 and the cushioning body 42 are housed in the transport box 30, but they may be transported without being housed in the transport box 30. In that case, the cushioning body 42 may be fixed to the packaging box 20 by, for example, a PP (polypropylene) band, or the cushioning body 42 may be fixed to the packaging box 20 by another method.

[0089] (5) In the above embodiment 1, the buffer body 42 is disposed on both the top and bottom of the packaging box 20, but the buffer body 42 may be disposed only on the top.

[0090] (6) In the above embodiment 1, the first recess 60A is formed on both sides in the front-rear direction with respect to the center in the front-rear direction, and even if the buffer 42 is rotated 180 degrees around the vertical line, the first recess 60A is located directly above the terminal 13. In contrast, the first recess 60A may be formed on only one side in the front-rear direction with respect to the center in the front-rear direction. In that case, however, attention must be paid to the orientation when arranging the upper buffer 42A.

[0091] (7) In the above embodiment, the terminal 13 protrudes upward from the upper surface 10A of the lead-acid battery 10. However, as shown in Fig. 17, a T-shaped protrusion 81 may be provided on the upper surface of the lid member 12 of the lead-acid battery 10, and the terminal 13 may be provided in a portion other than the T-shaped protrusion 81.

[0092] (8) In the above embodiment, the terminal 13 is provided on the top surface 10A of the lead-acid battery 10, but the surface on which the terminal 13 is provided is not limited to the top surface 10A. For example, the terminal 13 may be provided on a side surface of the lead-acid battery 10.

[0093] (9) In the above embodiment 1, the tip portion 26 is provided on both of the two flaps 24A and 24B. However, the tip portion 26 may be provided on only one of the flaps 24.

[0094] (10) In the above embodiment 1, an example was described in which the two terminals 13 are provided on one side of the short side of the lead-acid battery 10. However, the two terminals may be provided on one side of the long side of the lead-acid battery 10.

[0095] (11) In the above embodiment 1, the lead-acid battery 10 mounted on an automobile is described as an example, but the lead-acid battery 10 is not limited to being mounted on an automobile. For example, the lead-acid battery 10 may be mounted on a motorcycle or may be used for other purposes. [Explanation of symbols]

[0096] 1: Lead-acid battery transport structure 10:Lead acid battery 10A: Upper surface (an example of a surface facing the second wall portion in a lead-acid battery) 13: Terminal 20: Packing box 21: Side wall portion (the two side wall portions having the widest width in the lateral direction among the four side wall portions are examples of the first wall portion) 23: Upper wall portion (an example of the second wall portion) 24A, 24B: Flap 26:Tip part 42A: Upper buffer (an example of a buffer) 51: Upper wall portion (an example of the third wall portion) 54: Protruding part 70: Fourth side wall portion (an example of the fourth wall portion) 71: Fifth side wall portion (an example of the fifth wall portion)

Claims

1. A packaging box in which a lead-acid battery is packed, the packaging box having a second wall portion formed by two flaps extending from two opposing first wall portions of the packaging box, and a tip portion of at least one of the flaps is folded and inserted into the packaging box; a buffer body disposed on an outer side of the second wall portion, the buffer body having a third wall portion facing the second wall portion; Equipped with When the packaging box is dropped with the lead-acid battery facing the second wall portion facing downward, the tip portion of the flap is sandwiched between the lead-acid battery and the third wall portion and crushed, thereby cushioning the impact of the drop, the third wall portion has a protruding portion protruding toward the second wall portion, and at least a part of a tip portion of the flap overlaps with the protruding portion when viewed from a direction perpendicular to a wall surface of the third wall portion; A transport structure for a lead-acid battery, wherein a terminal is provided on a surface of the lead-acid battery facing the second wall portion, and the terminal and the protruding portion do not overlap when viewed from a direction perpendicular to the wall surface of the third wall portion.

2. A transport structure for a lead-acid battery according to claim 1, a tip portion of the flap overlaps with the protruding portion as viewed from a direction perpendicular to the wall surface of the third wall portion.

3. A transport structure for a lead-acid battery according to claim 1 or claim 2, A transport structure for a lead-acid battery, wherein the protruding portion has a hollow on a surface opposite to the surface facing the second wall portion.

4. A transport structure for a lead-acid battery according to any one of claims 1 to 3, The terminal is provided on either side of the short side direction of the lead-acid battery with a center in the short side direction as a reference, when viewed from a direction perpendicular to the wall surface of the third wall portion, or is provided on either side of the long side direction of the lead-acid battery with a center in the long side direction as a reference, A transport structure for a lead-acid battery, wherein the terminal and the protruding portion do not overlap even when the buffer body is rotated 180 degrees around a straight line perpendicular to the wall surface of the third wall portion.

5. A transport structure for a lead-acid battery according to any one of claims 1 to 4, A transport structure for a lead-acid battery, wherein a width of a tip portion of the flap in a direction perpendicular to a wall surface of the third wall portion is wider than a width of the terminal in the direction perpendicular to the wall surface.

6. A transport structure for a lead-acid battery according to any one of claims 1 to 5, A fourth wall portion constituting a part of the buffer body, the fourth wall portion being connected to an outer peripheral edge portion of the third wall portion and having a frame shape surrounding the packaging box; a fifth wall portion constituting a part of the buffer body, the fifth wall portion being connected to the fourth wall portion and having a frame shape surrounding the fourth wall portion; having A transport structure for a lead-acid battery, wherein a space is secured between the fourth wall portion and the fifth wall portion.

7. A transport structure for a lead-acid battery according to claim 6, The transport structure for a lead-acid battery, wherein the third wall portion and the fourth wall portion are recessed so as to be spaced away from corners of the packaging box.

8. A transport structure for a lead-acid battery according to any one of claims 1 to 7, The transport structure for a lead-acid battery, wherein the buffer body is made of pulp mold.

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