Cushioning structure for packed object

Abstract

To provide a cushioning structure that can achieve an excellent cushioning effect despite a small form, as a cushioning structure for protecting a packed object, and advantageously reduce industrial waste.SOLUTION: A cushioning structure is disposed inside a crate part of a packing frame surrounding a packed object, in order to protect the packed object secured on an inner bottom of the packing frame. The cushioning structure includes: a first cushioning member made of a foam material disposed adjacent to a side of the packed object; a second cushioning member constituted of a corrugated board assembly that supports the first cushioning member; a base part made of corrugated paper that is located to overlap the inner sides of at least parts of two adjacent vertical frames among a plurality of vertical frames constituting the crate part of the packing frame, and is joined with the bottom of the second cushioning member supporting the first cushioning member; and an anchor part made of corrugated paper that is projected on a back side of the base part and is fit between the two vertical frames.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a cushioning structure for protecting an object to be packaged. [Background technology]

[0002] When industrial products and the like are transported to distant destinations (e.g., overseas) using shipping containers, a packaging structure is adopted in which the product is fixed inside a packaging frame to protect the product from vibrations and shocks during transport.

[0003] For example, Patent Document 1 discloses a packaging structure in which an outboard motor is placed horizontally between polystyrene foam pads and secured to a wooden skid with square posts and angled cardboard tubes. This packaging structure is intended for lightweight, small outboard motors and cannot be used for medium- to large-sized outboard motors. Furthermore, despite its flat packaging, it lacks the strength to withstand multiple stacks, resulting in poor loading efficiency. Furthermore, the structure requires a wide-area pad to support the load in order to distribute it, resulting in the use of a large amount of polystyrene foam, which becomes industrial waste.

[0004] In the case of outboard motors, particularly medium-sized or larger outboard motors, a packaging method is adopted in which the outboard motor is stored upright with its propulsion direction facing downwards using stern brackets, which are structures for fixing the outboard motor to the hull, and is bolted to a stand installed on the inner bottom of the packaging frame.

[0005] In this packaging configuration, there is essentially no support structure for the packing frame other than the stern brackets, and the outboard motor is supported inside the packing frame in an overhanging state on both sides of the frame.In addition, the center of gravity is high relative to the support position and biased toward the engine.If an external impact occurs during loading and unloading or transport, there is a risk that the outboard motor, which is the item to be packed, will swing against the packing frame and come into contact with it.Therefore, to prevent damage from contact, cushioning materials such as polystyrene foam are also used.

[0006] Incidentally, final products such as outboard motors are transported to their destinations in a packaged state. Therefore, packing crates are essentially one-way packaging materials, and to reduce additional costs, they are designed to have the minimum strength and rigidity required for normal loading and unloading operations and transportation. Therefore, if a large impact is applied due to an external factor, particularly if the packing crate falls over, there is a risk that the cushioning material, such as polystyrene foam, will not be able to absorb the impact and will break, causing damage to the outboard motor that is being packaged. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Japanese Patent Application Publication No. 10-250768 Summary of the Invention [Problem to be solved by the invention]

[0008] The present invention has been made in consideration of the above-mentioned circumstances, and its purpose is to provide a cushioning structure for protecting packaged items, which is small in size but provides good cushioning effects, and is also advantageous in reducing industrial waste. [Means for solving the problem]

[0009] In order to solve the above problems, the present invention provides: A buffer structure disposed inside a crate portion of a packing frame surrounding an object to be packed in order to protect the object fixed to the inner bottom portion of the packing frame, A first cushioning member made of a foam material having a surface disposed adjacent to a side surface of the packaging object; a second cushioning member formed of a corrugated cardboard assembly that supports the first cushioning member while being in contact with the rear surface of the first cushioning member; a base portion made of cardboard, the base portion being arranged to overlap the inside of at least a portion of each of two adjacent vertical frames among the plurality of vertical frames constituting the crate portion of the packing frame, and having a surface to which a bottom portion of the second buffer member supporting the first buffer member is joined; An anchor portion made of cardboard protruding from the back surface of the base portion, the anchor portion being fitted between the two vertical frames and fixing the base portion to the crate portion; The buffer structure is provided with: [Effects of the Invention]

[0010] With the above-described configuration, when a large impact is applied to the cushioning structure from an external factor, the impact load acting on the cushioning structure from the packaged item is alleviated by the elastic deformation of the first cushioning member made of foam material, and is absorbed by the plastic deformation of the second cushioning member made of a cardboard assembly, and the base portion and anchor portion function as the third cushioning member, thereby achieving a good cushioning effect. Furthermore, compared to when the entire cushioning structure is made of foam material, the amount of foam material used, which becomes industrial waste after use, can be reduced. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 2 is a front view showing the packaging structure for the outboard motor. [Figure 2] FIG. 2 is a side view showing the packaging structure for the outboard motor. [Figure 3] 1A is a front view showing a mounting structure of a buffer member, and FIG. 1B is a side view showing the mounting structure of a buffer member. [Figure 4] FIG. [Figure 5] 1A is a side view showing the disassembled state of the buffer member, and FIG. 1B is a side cross-sectional view showing the fitted state. [Figure 6] 1A is a plan view showing a second buffer member, and FIG. 1B is a development view thereof. [Figure 7] FIG. 4 is a front cross-sectional view of a main part showing an exploded state of the buffer member. [Figure 8] FIG. 10 is a front cross-sectional view of a main part showing a deformed state of the buffer member. [Figure 9] 1A is a side view of a main part showing a buffer structure, and FIG. 1B is a side view of the main part showing a deformed state thereof. DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0013] 1 and 2 show a packaging structure in which an outboard motor 60, which is the object to be packaged, is fixed and housed inside a packaging frame 50. The packaging frame 50 comprises a bottom frame 51 that forms a skid, and side frames 52 and end frames 53 that form a crate portion around the bottom frame 51. A stand 54 is erected approximately in the center of the bottom frame 51.

[0014] The outboard motor 60 is fixed to the mount 54 by placing the stern bracket 64 on the mount 54 in an upright position with its propulsion direction facing downwards and fastening it with bolts. The propeller (not shown) is removed from the propeller shaft 63 and is wrapped in a sheet 65 (such as a vinyl sheet) in this state.

[0015] Next, the lower parts (521) of the side frames 52 are fixed to each long side of the bottom frame 51 with bolts, the lower ends of the end frames 53 are fixed to each short side with bolts, the side frames 52 and the end frames 53 are joined to each other with bolts, and the upper parts of the opposing side frames 52 are connected with a reinforcing frame (not shown) to form a crate section that surrounds the outboard motor 60. After that, a cardboard box (not shown) is placed over the packaging frame 50, and the outboard motor is shipped in this state.

[0016] The bottom frame 51 is configured as a skid by joining five base frames 511 arranged parallel to the short side direction and four vertical frames 512 arranged parallel to the long side direction and crossing the five base frames 511 above them, together with a bottom plate (not shown). The base frames 511 and vertical frames 512 are made of structural materials such as channel steel. The platform 54 has legs erected adjacent to the joints between the two base frames 511 and the two vertical frames 512 near the center, and an upper surface that fits onto the stern bracket 64 and has the same slope as the transom board of the boat so that the engine crankshaft is horizontal when the outboard motor 60 is fixed.

[0017] 1, the side frame 52 is configured such that the lower frame 521, which serves as the fixed portion to the bottom frame 51, and the upper frame 522 are bolted to the lower and upper ends of multiple vertical frames 523, respectively, and are welded to the ends of a pair of braces 525, which are welded to each other at their central intersection, and are rigidly connected by fastening braces 524 to prevent distortion. The lower frame 521, upper frame 522, and braces 524 are configured as L-angle structural materials, and the vertical frame 523 is configured as a hat-shaped structural material.

[0018] As shown in Figure 2, the end frame 53 is constructed by connecting the upper parts of a pair of vertical frames 531 with an upper frame 532, and by welding a pair of braces 533 welded to each other at the central intersection, creating a rigid connection that prevents distortion. The vertical frames 531 and the upper frames 532 are constructed from L-angle structural materials. A reinforcing frame 535 is installed between the side frames 52, providing a support structure for the upper buffer member 45.

[0019] As described above, the side frames 52 and end frames 53 surrounding the outboard motor 60 fixed to the mount 54 on the bottom frame 51 each have a truss structure, which not only protects the outboard motor 60 but also provides the strength and rigidity to enable it to be stacked when loaded into a container or stored.

[0020] However, medium to large outboard motors have an overall height of 1.5 to 2 m and a weight of 100 to 350 kg, and in addition to being supported in a state where they overhang significantly from the frame 54, their center of gravity is high relative to the support position and is biased toward the engine, which is on the left side in Figure 1. Moreover, as already mentioned, the packing frame 50 is basically a one-way packing material, and is designed to have the minimum strength and rigidity required for normal loading and unloading operations and transportation.

[0021] Therefore, if an excessive impact is applied to the packing crate 50 due to an external factor during loading and unloading operations or transportation, for example, if a transport vehicle passes over a bump in the road surface such as a speed breaker without slowing down during land transportation, the outboard motor 60 may swing inside the packing crate 50 and come into contact with the packing crate 50. In particular, if the packing crate 50 were to tip over, it would be difficult for the stand 54 to cantilever the outboard motor 60, and the outboard motor 60 would fall onto the inside surface of the packing crate 50.

[0022] Therefore, in order to prevent damage to the outboard motor 60 due to contact with the packing frame 50, shock absorbing members 41, 45, 46 are provided adjacent to the outboard motor 60 inside the packing frame 50.

[0023] Of these, the buffer members 45, 46 are buffer member 45 against upward movement near the cavitation plate and buffer member 46 against downward movement of the top cowling 62 when a counterclockwise moment in Figure 1 is generated due to the offset in the center of gravity of the outboard motor 60 mentioned above, and buffer member 46 is fixed onto the bottom plate of the bottom frame 51.

[0024] On the other hand, the buffer members 41 are disposed adjacent to the sides of the outboard motor 60 and inside the side frames 52 for the purpose of absorbing shock when the outboard motor 60 swings left and right in Figure 2 or when the outboard motor 60 is dropped due to tipping over of the packing frame 50. The buffer members 41 and their mounting structure will be described below with reference to the drawings.

[0025] (Mounting structure of cushioning member 41) As shown in Figures 2 and 3, the cushioning member 41 is made up of a first cushioning member 10 having a surface that is curved two-dimensionally or three-dimensionally along the shape of the side surface near the bottom cowl 61 of the outboard motor 60, and a second cushioning member 20 that supports the first cushioning member 10 while abutting against the back surface of the first cushioning member 10, with the first cushioning member 10 being made up of a foam material and the second cushioning member 20 being made up of a cardboard assembly.

[0026] As shown in FIG. 1 , the buffer member 41 is oriented to match the shape of the bottom cowl 61 of the outboard motor 60, and is joined to the surface of the base portion 42 at the bottom of the second buffer member 20. The base portion 42 is made of a cardboard sheet, and a block-shaped anchor portion 43 is joined to the back surface of the base portion 42. The anchor portion 43 is made of a laminate of multiple cardboard sheets, and therefore the base portion 42 and the anchor portion 43 also have a buffer function in their thickness direction, and together with the buffer member 41, they constitute the buffer member assembly 40.

[0027] The buffer member 41 (buffer member assembly 40) having the above-described mounting structure is positioned adjacent to the side of the outboard motor 60 inside the side frame 52 by fitting the anchor portion 43 between the two vertical frames 523 so that the side edge portion 423 of the base portion 42 overlaps the inside of each part (flange portion) of the two adjacent vertical frames 523 of the side frame 52, and by sandwiching the side edge portion 433 of the anchor portion 43 between the two vertical frames 523.

[0028] The base portion 42 has a vertical length corresponding to the length from the top to the bottom of the vertical frame 523, and the lower end 422 of the base portion 42 is supported on the inner bottom of the packing frame 50, and in this state, the upper end 421 of the base portion 42 abuts or is adjacent to the upper frame 522.This configuration prevents the cushioning member 41 from shifting position during transportation.

[0029] (Assembly structure of the buffer member 41) Next, an embodiment of the first buffer member 10 and the second buffer member 20 that constitute the buffer member 41 will be described with reference to the drawings.

[0030] 4, the first cushioning member 10 has a front surface 11 formed of a curved surface that curves along the shape of the side surface of the outboard motor 60, and a back surface 12 having a flat basic shape, and is configured as an elongated block having a first width w1 and extending in the longitudinal direction. The foam material that forms the first cushioning member 10 is not particularly limited, but a synthetic resin foam material such as expanded polystyrene can be suitably used.

[0031] In a preferred embodiment, the first buffer member 10 has a plurality of legs 14 protruding from the rear surface 12 at intervals in the longitudinal direction, as shown in FIG. 5(A), and the second buffer member 20 has a plurality of sockets 24 formed therein that hold the legs 14 of the first buffer member 10 in an inserted state, as shown in FIG. 5(B).

[0032] 6(B), the second cushioning member 20 is formed from a single corrugated cardboard blank, with the bottom wall 21, a pair of side walls 22, and a pair of end flaps 23 having a flute direction in the width direction perpendicular to the longitudinal direction. That is, fold lines 221, 231 (rules, scores) are formed on both sides and both ends of the bottom wall 21, respectively, and are continuous with the side walls 22 and end flaps 23 via these fold lines. Slits 25 that engage with the engaging pieces 33 of the bridging portions 30 are formed on the edges of each side wall 22.

[0033] The multiple bridging portions 30 are each formed from a corrugated cardboard blank of the same shape, with the flute direction extending from the upper end 32 toward the lower end 31. At positions corresponding to the engaging pieces 33 on both sides of the lower end 31, engaging grooves 35 are provided toward the engaging piece 33 on the upper end 32 side to engage with the lower portions of the slits 25 in the side wall portions 22, and as shown in Figure 7, expanded portions 34 are formed extending laterally via the engaging piece 33. In addition, an expanded portion is formed at the introduction portion at the lower end of each engaging groove 35 to facilitate engagement with the slit 25.

[0034] Then, the fold lines 221 on both sides of the bottom wall portion 21 are bent, and the bottom wall portion 21 and the pair of side wall portions 22 on either side thereof form a groove shape extending in the longitudinal direction with a second width w2. By engaging the engagement grooves 35 of the bridging portions 30 with each slit 25 and engaging the engagement piece portions 33, as shown in Figure 6(A), the pair of side wall portions 22 are bridged by each bridging portion 30, and three socket portions 24 that hold the leg portions 14 of the first buffer member 10 are formed by three adjacent pairs of bridging portions 30 and side wall portions 22.

[0035] 5 and 7, when the engaging piece 33 of the bridging part 30 is engaged with the slit 25 of the side wall part 22, a gap is formed between the lower end 31 of the bridging part 30 and the bottom wall part 21. In other words, the height from the upper end 32 to the lower end 31 of the bridging part 30 and the depth of the engaging groove 35 (the length of the engaging piece 33 in the engaging direction) are determined so that a gap is formed between the bridging part 30 and the bottom wall part 21 in the engaged state.

[0036] 5, when the leg portions 14 of the first cushioning member 10 are inserted into and held in the socket portions 24 of the second cushioning member 20 until the upper ends of the bridging portions 30 abut against the rear surface 12 of the first cushioning member 10, a gap is formed between the end portions of the leg portions 14 and the bottom wall portion 21. In other words, the dimensions of the leg portions 14 are determined so that a gap remains between the leg portions 14 and the bottom wall portion 21.

[0037] In this embodiment, the legs 14 of the first buffer member 10 are held in the sockets 24 of the second buffer member 20, thereby integrating the first buffer member 10 and the second buffer member 20. Therefore, no additional joining or engagement is required between the first buffer member 10 and the second buffer member 20. Alternatively, as shown in FIG. 9(A), an end flap 23 of the second buffer member 20 may be joined 15 to the end surface 13 of the first buffer member 10. Because the flute direction of the end flap 23 is oriented in the width direction, it can easily deform in the height direction, as shown in FIG. 9(B), and does not hinder the elastic deformation of the first buffer member 10 or the plastic deformation of the second buffer member 20 (bridging portion 30).

[0038] (Shock Absorption Function of the Buffer Assembly 40) With the above-described buffer structure (buffer assembly 40), if the packing crate 50 falls over due to an external factor during transportation or loading / unloading of the outboard motor 60 (packing crate 50), causing the outboard motor 60 to fall sideways inside the packing crate 50, as shown in Figures 8 and 9(B), the first buffer member 10, second buffer member 20, base portion 42, and anchor portion 43 (buffer assembly 40) are present below the outboard motor 60', so that the impact load from the outboard motor 60' acts on the surface 11' of the first buffer member 10', causing the first buffer member 10' to be pressed downward while partially elastically deforming, and the bridging portion 30' of the second buffer member 20' to plastically deform from the upper end 32' (first stage).

[0039] Furthermore, as plastic deformation of the engaging piece portion 33' of the bridging portion 30' and the slit 25' and slit bottom portion 253 of the side wall portion 22 progresses and the bridging portion 30' descends, the leg portion 14' of the first buffer member 10' seats on the bottom wall portion 21 of the second buffer member 20 before the bridging portion 30' is crushed, and elastic deformation of the leg portion 14' begins, and plastic deformation of the bridging portion 30' progresses in parallel (second stage).

[0040] Thereafter, the bridging portion 30' of the second shock absorber 20 is crushed by the weight of the outboard motor 60', and the body and leg portions 14' of the first shock absorber 10' are elastically and partially plastically compressed, and the fall of the outboard motor 60' ends with the static load of the outboard motor 60' being received by the first shock absorber 10' and the bottom wall portion 21, base portion 42, and anchor portion 43 of the second shock absorber 20 (third stage).

[0041] The above process is actually completed almost instantly, but the difference in deformation pattern between the elastic deformation of the first cushioning member 10 made of foam material and the plastic deformation of the second cushioning member 20 made of a cardboard assembly, in particular the synergistic effect of the plastic deformation of the second cushioning member 20 delaying the elastic compression of the first cushioning member 10 and slowing down the plastic deformation of the second cushioning member 20, together with the cushioning effect of the third cushioning member (base portion 42, anchor portion 43) located below them, prevents the first cushioning member 10 from breaking and maximizes the impact absorption effect achieved by the elastic deformation of the first cushioning member 10 and the plastic deformation of the second cushioning member 20, which is advantageous in preventing damage to the outboard motor 60.

[0042] Furthermore, in the above process, the first buffer member 10 enters the groove defined between the side wall portions 22, 22 of the second buffer member 20, and the side surface of the first buffer member 10 is guided by the side wall portions 22. In addition, the leg portions 14 of the first buffer member 10 are guided by the socket portions 24 formed between the bridging portions 30 of the second buffer member 20. This prevents the first buffer member 10 and the second buffer member 20 from shifting positions, ensures that the elastic deformation of the main body and leg portions 14 of the first buffer member 10 is guided between the side wall portions 22, 22 of the second buffer member 20, and ensures that the impact load acting on the first buffer member 10 is input to the bridging portions 30 of the second buffer member 20, thereby achieving the designed impact absorption effect.

[0043] Furthermore, the anchor portion 43 that constitutes the mounting structure of the cushioning member 41 is fitted between the two vertical frames 523 of the packing frame 50, preventing the cushioning member 41 from shifting position, and is positioned to fill the gap formed between the cardboard box covering the outside of the packing frame 50 and the base portion 42 that is stacked on the inside of the vertical frame 523, thereby providing a flat support base for the base portion 42, which is advantageous in ensuring that the cushioning process by the first cushioning member 10 and the second cushioning member 20 proceeds reliably.

[0044] The above-described configuration of the base portion 42 and anchor portion 43 improves the degree of freedom in the layout of the shock absorbing member 41. For example, by arranging the shock absorbing member 41 diagonally on the surface of the base portion 42 along the bottom cowl 61, which is a high-strength portion of the outboard motor 60, it is possible to maximize the shock absorbing effect for the outboard motor 60. This is also advantageous when arranging the shock absorbing member 41 across the portion where the vertical frame 523 is present and the portion where it is not present.

[0045] In addition, the base portion 42 and anchor portion 43 that make up the third cushioning member are made of cardboard, which is recyclable as a resource, just like the second cushioning member 20, so there is an advantage in that the amount of foam material used, which becomes industrial waste after use, can be reduced compared to when the entire cushioning member is made of foam material.

[0046] Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications and changes are possible within the scope of the present invention.

[0047] For example, in the above embodiment, three legs 14 are formed on the rear surface 12 of the first buffer member 10, but the number of legs 14 may be two or four or more. Furthermore, if the gap between the end of the leg 14 and the bottom wall portion 21 is too large, the amount of elastic deformation of the leg 14 decreases accordingly, so the gap is set to ½ or less, preferably ⅓ or less, of the depth of the socket portion 24.

[0048] In the above embodiment, the width of the leg portions 14 in the longitudinal direction of the first buffer member 10 is 1 / 4 of the spacing between sections where no leg portions are provided, i.e., the leg-to-spacing ratio is 1:4, but this ratio may be other. Also, in the illustrated example, legs (foam portions) can be added to sections where no leg portions are provided. However, if the spacing ratio is too large, the leg portions will not have sufficient elasticity. Conversely, if the leg portion (foam portion) ratio is too large, not only will the amount of foam material used increase, but the proportion of elastic deformation in the stage (second stage) where plastic deformation and elastic deformation progress in parallel will increase, which may reduce the contribution of the plastic deformation of the bridging portion to the buffering effect.

[0049] Furthermore, the back surface 12 of the first cushioning member 10 may be formed flat without providing the legs 14 on the back surface 12 of the first cushioning member 10. In this case, as shown in FIG. 9(A), the first cushioning member 10 can be held by the second cushioning member 20 by joining 15 the end flap 23 of the second cushioning member 20 to the end surface 13 of the first cushioning member 10.

[0050] In the above embodiment, the upper end 32 of the bridging portion 30 of the second buffer member 20 is aligned with the upper end of the side wall portion 22, but the upper end of the side wall portion 22 may extend upward beyond the upper end 32 of the bridging portion 30. While such an extension does not contribute to reducing material costs, it is advantageous in ensuring that the first buffer member 10 is reliably guided into the groove of the second buffer member 20 in the configuration without the legs 14, as described above, and thus preventing displacement.

[0051] In the above embodiment, the buffer member 41 is inclined along the bottom cowl 61, which is a high-strength part of the outboard motor 60, and is positioned between the vertical frames 523, 523. However, it may also be positioned inside the vertical frame 523 on the top cowl 62 side, which is the left side in Figure 1, or may be added.

[0052] In the above embodiment, the outboard motor 60 is described as the packed object. However, the cushioning member 41 according to the present invention can also be used to pack other objects that, like the outboard motor, are not self-supporting enough but are transported fixed in a packing frame in an upright position, such as a motorcycle. [Explanation of symbols]

[0053] 10 First cushioning material (foam material) 11 Surface 12 Bottom 20 Second cushioning member (cardboard assembly) 21 Bottom wall 22 Side wall 30 Bridge section 31 Bottom end 32 Top 33 Engagement piece 40 Buffer member assembly 41 Cushioning material 42 Base 43 Anchor part 60 Outboard motor (packaged item) 50 packing boxes 51 Bottom frame 52 Side frame 53 End Frame 54 Mounting stand

Claims

1. A buffer structure disposed inside a crate portion of a packing frame surrounding an object to be packed in order to protect the object fixed to the inner bottom portion of the packing frame, a first cushioning member made of a foam material having a surface disposed adjacent to a side surface of the packaging object; a second buffer member formed of a corrugated cardboard assembly that supports the first buffer member while being in contact with the rear surface of the first buffer member; a base portion made of cardboard, the base portion being arranged to overlap the inside of at least a portion of each of two adjacent vertical frames among the plurality of vertical frames constituting the crate portion of the packing frame, and having a surface to which a bottom portion of the second buffer member supporting the first buffer member is joined; an anchor portion made of cardboard protruding from the back surface of the base portion, the anchor portion being fitted between the two vertical frames to fix the base portion to the crate portion; A buffer structure.

2. The cushioning structure described in claim 1, wherein the base portion has a vertical length corresponding to the length from the upper end to the lower end of the two vertical frames, and the lower end of the base portion is configured to be supported by the inner bottom of the packing frame.

3. The cushioning structure according to claim 1 , wherein the anchor portion is made of a laminate of corrugated cardboard.

4. the first buffer member has a first width and extends in the longitudinal direction, the second buffer member has a bottom wall portion that forms a groove having a second width larger than the first width and extending in the longitudinal direction, a pair of side wall portions that are continuous with both sides of the bottom wall portion via bent portions, and a plurality of bridging portions that bridge the pair of side wall portions at a plurality of locations spaced apart in the longitudinal direction, 4. The buffer structure according to claim 1, wherein the first buffer member is fixed to the second buffer member in a state of contacting an upper end of the bridge portion within the groove.

5. 5. The cushioning structure according to claim 4, wherein the bottom wall portion and the pair of side wall portions of the second cushioning member are formed from a single first corrugated board blank whose flute direction is the width direction perpendicular to the longitudinal direction, and the plurality of bridging portions are formed from a plurality of second corrugated board blanks whose flute direction is the direction from the upper end to the lower end.

6. the object to be packed is an outboard motor, and the outboard motor is fixed on the bracket with its propulsion direction facing downward by fastening a stern bracket of the outboard motor to a bracket provided on the inner bottom of the packing frame, 4. The shock-absorbing structure according to claim 1, wherein the second shock-absorbing member supporting the first shock-absorbing member is positioned obliquely on the surface of the base portion along a bottom cowl portion of the outboard motor.

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