Buffer member for object to be packed

Abstract

Provided is a cushion member for protecting an object to be packed, the cushion member being small in size and capable of obtaining a good cushion effect, and being beneficial to reduction of industrial waste. In order to protect an object to be packed fixed to the inner bottom portion of a packing frame, a buffer member is disposed on the inner side of a side portion of the packing frame surrounding the object to be packed, and is provided with: a first buffer member having a front surface disposed adjacent to the object to be packed and a back surface on the opposite side from the front surface; and a second cushioning member having an upper end that comes into contact with the back surface of the first cushioning member and a bottom that is disposed on the side of the side portion of the packing frame, the first cushioning member being made of a foam material, and the second cushioning member being made of an assembly of corrugated paper.

Description

Technical Field

[0001] The present invention relates to a cushioning member for protecting a packaging object. Background Art

[0002] When industrial products are transported to a remote destination (eg, overseas) using a transport container, a packaging structure is used in which the products are secured inside a packaging frame to protect them from vibration and shock during transport.

[0003] For example, Patent Document 1 discloses a packaging structure in which an outboard motor is placed horizontally, sandwiched from top to bottom with expanded polystyrene pads, and secured to a wooden skid using prisms and angled paper tubes. This packaging structure is designed for lightweight, small outboard motors and cannot be used for medium to large outboard motors. Furthermore, compared to flat packaging, it lacks the strength to withstand multiple layers of stacking, resulting in poor cargo handling efficiency. Furthermore, the structure requires a large area of ​​padding to support the load in order to distribute the load, resulting in a significant increase in the amount of expanded polystyrene used, which becomes industrial waste.

[0004] In the case of outboard motors, especially medium-sized and larger outboard motors, the following packing method is adopted: using a stern bracket as a structure for fixing the outboard motor to the hull, the outboard motor is fixed to a stand uprightly set on the inner bottom of the packing frame with bolts in a state in which it is upright with the propulsion direction of the outboard motor as the downward direction for storage.

[0005] This packaging method essentially lacks any support structure for the packaging frame other than the stern bracket. Not only is the outboard motor supported inside the packaging frame, extending outwards on both sides of the platform, but its center of gravity is also higher than the support position and offset toward the engine. Therefore, if the outboard motor is subjected to external impact during loading and unloading operations or transportation, it could swing against the packaging frame and come into contact with it. Therefore, to prevent damage from such contact, a cushioning material such as expanded polystyrene is used.

[0006] However, end products like outboard motors are transported to their destination in a packaged state. Therefore, packaging frames are primarily one-way packaging materials, designed to have the minimum strength and rigidity required for normal cargo handling and transportation to minimize additional costs. Consequently, if a significant impact is applied by an external factor, particularly if the packaging frame tips over, the cushioning material, such as expanded polystyrene, may not fully absorb the impact and break, potentially damaging the outboard motor.

[0007] Prior art literature

[0008] Patent Literature

[0009] Patent Document 1: Japanese Patent Application Laid-Open No. 10-250768 Summary of the Invention

[0010] Problems to be solved by the invention

[0011] The present invention has been made in view of such actual circumstances, and an object thereof is to provide a cushioning member that is compact in shape and can provide a good cushioning effect as a cushioning member for protecting packaging objects, and that also contributes to the reduction of industrial waste.

[0012] Solutions for solving problems

[0013] To solve the above-mentioned problem, the present invention is a buffer member provided inside a side portion of a packing frame surrounding a packing object in order to protect the packing object fixed to the inner bottom of the packing frame, and comprising:

[0014] a first buffer member having a front surface disposed adjacent to the packaging object and a back surface opposite to the front surface; and

[0015] a second buffer member having an upper end abutting against the back surface of the first buffer member and a bottom portion provided on the side of the packing frame;

[0016] The first cushioning member is made of a foam material, and the second cushioning member is made of an assembly of corrugated paper.

[0017] Effects of the Invention

[0018] The cushioning member according to the present invention, with the aforementioned configuration, is capable of providing a superior cushioning effect when subjected to a large external impact. The impact load from the packaged object acting on the cushioning member is mitigated by the elastic deformation of the first cushioning member, which is made of a foam material, and is absorbed by the plastic deformation of the second cushioning member, which is made of an assembly of corrugated paper sheets. This suppresses breakage of the first cushioning member, particularly in the initial stages of breakage, thereby achieving a superior cushioning effect. Furthermore, compared to a case where the cushioning member is entirely made of foam material, the amount of foam material used, which becomes industrial waste after use, can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a front view showing the packaging structure of the outboard motor.

[0020] Figure 2 It is a side view showing the packaging structure of the outboard motor.

[0021] Figure 3(A) is a front view showing the assembly structure of the buffer member, and (B) is a side view showing the assembly structure of the buffer member.

[0022] Figure 4 is a side view showing a buffer member.

[0023] Figure 5 (A) is a side view showing an exploded state of the buffer member, and (B) is a side sectional view showing a fitted state of the buffer member.

[0024] Figure 6 (A) is a plan view showing the second cushioning member, and (B) is a development view of the second cushioning member.

[0025] Figure 7 It is a main part front cross-sectional view showing an exploded state of the buffer member.

[0026] Figure 8 It is a front cross-sectional view of a main part showing a deformed state of the buffer member.

[0027] Figure 9 (A) is a main portion side view showing a buffer member, and (B) is a main portion side view showing a deformed state of the buffer member.

[0028] Figure 10 (A) is a side view of a main part showing a buffer member according to a second embodiment, and (B) is a side view of a main part showing a deformed state of the buffer member.

[0029] Description of Reference Numerals

[0030] 10 First cushioning member (foaming material)

[0031] 11 Front

[0032] 12 Bottom

[0033] 14 Legs

[0034] 20 Second cushioning member (corrugated paper assembly)

[0035] 21 bottom wall

[0036] 22 side wall

[0037] 24 sockets

[0038] 25 slits

[0039] 30 bridge part

[0040] 31 lower end

[0041] 32 upper end

[0042] 33 snap-fitting piece

[0043] 35 snap-in slots

[0044] 60 outboard motors (packing objects)

[0045] 50 packing boxes

[0046] 51 bottom frame

[0047] 52 side frame

[0048] 53 end frame

[0049] 54 platforms. DETAILED DESCRIPTION

[0050] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0051] Figure 1 and Figure 2 The figure shows a packing structure in which an outboard motor 60, the packing object, is secured and housed within a packing frame 50. The packing frame 50 includes a bottom frame 51 forming a skid, side frames 52 and end frames 53 forming a crate around the bottom frame 51, and a stand 54 erected approximately in the center of the bottom frame 51.

[0052] The outboard motor 60 is fixed to the mount 54 by bolting a stern bracket 64 placed on the mount 54 in an upright position with the propulsion direction downward. The propeller (not shown) is removed from the propeller shaft 63 and wrapped in a sheet 65 (vinyl sheet, etc.).

[0053] Next, the lower portions (521) of the side frames 52 are bolted to the respective long sides of the bottom frame 51, the lower ends of the end frames 53 are bolted to the respective short sides of the bottom frame 51, and the side frames 52 and end frames 53 are bolted together. The upper portions of the opposing side frames 52 are connected with a reinforcing frame (not shown) to form a crate portion that surrounds the outboard motor 60. Afterwards, a corrugated cardboard box (not shown) is placed over the packing frame 50, and the product is shipped in this state.

[0054] The bottom frame 51 is constructed as a skid by combining five base frames 511 arranged parallel to each other in the short-side direction and four longitudinal frames 512 arranged parallel to each other in a cross pattern above the five base frames 511, along the lengthwise direction, with a bottom plate (not shown). The base frames 511 and longitudinal frames 512 are constructed from structural members such as channel steel. The stand 54 includes legs that are erected adjacent to the junction of the two base frames 511 and the two longitudinal frames 512, which are located near the center. The stand 54 also includes a top surface that, in conjunction with the stern bracket 64, has the same inclination as the transom of the boat, ensuring that the engine crankshaft is horizontal when the outboard motor 60 is secured.

[0055] like Figure 1 As shown, the side frames 52 are rigidly connected and prevent deformation by bolting a lower frame 521 and an upper frame 522, which serve as fixing portions to the base frame 51, to the lower and upper ends of a plurality of longitudinal frames 523, respectively. The lower frame 521, upper frame 522, and brace 524 are welded to the ends of a pair of braces 525 welded together at a central intersection, and are fastened to a brace 524. The lower frame 521, upper frame 522, and brace 524 are constructed from L-shaped structural members, while the longitudinal frames 523 are constructed from hat-shaped structural members.

[0056] like Figure 2 As shown, the end frames 53 are formed by joining the upper portions of a pair of longitudinal frames 531 with an upper frame 532, and then welding a pair of support members 533 welded together at their central intersection, creating a rigid connection that resists deformation. The longitudinal frames 531 and upper frame 532 are constructed from L-shaped structural members. Furthermore, a reinforcement frame 535 is installed between the side frames 52, supporting the upper cushioning member 45.

[0057] As described above, the side frames 52 and end frames 53 surrounding the outboard motor 60 fixed to the platform 54 on the bottom frame 51 each have a truss structure, which has the strength and rigidity to protect the outboard motor 60 and enable multi-layer stacking when loaded into a container or stored.

[0058] However, the total height of medium to large outboard motors is 1.5 to 2 meters, and the weight is 100 to 350 kg. In addition, the motors are supported in a state of being greatly extended relative to the stand 54, and the center of gravity is higher than the support position and is biased to the side. Figure 1 Furthermore, 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 cargo handling or transportation.

[0059] Therefore, if an excessive impact is applied to the packing frame 50 due to external factors during cargo loading and unloading operations or during transportation, for example, if a transport vehicle passes over a bump on the road surface such as a speed bump without slowing down during land transportation, the outboard motor 60 may swing inside the packing frame 50 and come into contact with the packing frame 50. In particular, if the packing frame 50 falls over, it is difficult to cantilever the outboard motor 60 using the stand 54, and the outboard motor 60 may fall onto the inner side of the packing frame 50.

[0060] Therefore, in order to prevent the outboard motor 60 from being damaged due to contact with the packing frame 50 , buffer members 41 , 45 , and 46 are provided inside the packing frame 50 adjacent to the outboard motor 60 .

[0061] The buffer members 45 and 46 among these members are formed due to the deviation of the center of gravity of the outboard motor 60. Figure 1 The buffer member 45 is provided to cushion the upward movement of the vicinity of the cavitation plate and the buffer member 46 is provided to cushion the downward movement of the top cowl 62 in the case of a counterclockwise moment. The buffer member 46 is fixed to the bottom plate of the bottom frame 51 .

[0062] On the other hand, the buffer member 41 is used to move the outboard motor 60 toward Figure 2 The cushioning member 41 is disposed inside the side frame 52 adjacent to the side of the outboard motor 60 for the purpose of alleviating the impact of the outboard motor 60 falling due to the left-right swing of the outboard motor 60 or the overturning of the packing frame 50. The cushioning member 41 and its mounting structure will be described below with reference to the drawings.

[0063] (Assembly Structure of Buffer Member 41)

[0064] like Figure 2 and Figure 3 As shown, the buffer member 41 is composed of a first buffer member 10 and a second buffer member 20, wherein the first buffer member 10 has a front surface composed of a curved surface that is bent two-dimensionally or three-dimensionally along the shape of the side surface near the bottom cowl 61 of the outboard motor 60, and the second buffer member 20 supports the first buffer member 10 while abutting against the back surface of the first buffer member 10. The first buffer member 10 is composed of a foam material, and the second buffer member 20 is composed of an assembly of corrugated paper.

[0065] like Figure 1As shown, the cushioning member 41 is oriented to match the shape of the bottom cover 61 of the outboard motor 60, with the bottom of the second cushioning member 20 bonded to the front surface of the base portion 42. The base portion 42 is made of a corrugated cardboard sheet, and a block-shaped anchor portion 43 is bonded to the back surface of the base portion 42. The anchor portion 43 is formed by laminating multiple corrugated cardboard sheets. Therefore, the base portion 42 and the anchor portion 43 also have a cushioning function in their thickness direction. Together with the cushioning member 41, they constitute the cushioning member assembly 40.

[0066] The buffer member 41 (buffer member assembly 40) having an assembly structure as described above is configured on the inner side of the side frame 52 adjacent to the side of the outboard motor 60 by embedding the anchor portion 43 between the two longitudinal frames 523 in a manner such that the side edge portion 423 of the base portion 42 overlaps with the inner side of a portion (flange portion) of each of the two adjacent longitudinal frames 523 of the side frame 52, so that the side edge portion 433 of the anchor portion 43 is clamped between the two longitudinal frames 523.

[0067] The base portion 42 has a length in the vertical direction corresponding to the length from the upper end to the lower end of the longitudinal frame 523. The lower end 422 of the base portion 42 is supported on the inner bottom of the packing frame 50. In this state, the upper end 421 of the base portion 42 is in contact with or adjacent to the upper frame 522. This structure prevents the position of the buffer member 41 from shifting during transportation.

[0068] (Assembly Structure of Buffer Member 41)

[0069] Next, embodiments of the first and second cushioning members 10 and 20 constituting the cushioning member 41 will be described with reference to the drawings.

[0070] like Figure 4 As shown, the first cushioning member 10 has a front surface 11 formed of a curved surface that follows the shape of the side surface of the outboard motor 60, and a generally flat back surface 12. The member is formed in an elongated block shape having a first width w1 and extending in the longitudinal direction. The foam material constituting the first cushioning member 10 is not particularly limited, but a synthetic resin foam such as expanded polystyrene is suitable.

[0071] In a preferred embodiment, Figure 5 As shown in FIG. 1 (A), the first buffer member 10 has a plurality of legs 14 protruding from the back surface 12 at intervals in the longitudinal direction. Figure 5 As shown in FIG. 2 (B), a plurality of socket portions 24 for holding the leg portions 14 of the first cushioning member 10 in a state where the leg portions 14 of the first cushioning member 10 are fitted therein are formed in the second cushioning member 20 .

[0072] like Figure 6As shown in Figure (B), the bottom wall 21, a pair of side walls 22, and a pair of end flaps 23 of the second cushioning member 20 are formed from a single sheet of corrugated cardboard, with the fluting direction being perpendicular to the longitudinal direction. Specifically, fold lines 221 and 231 (ruled or scored lines) are formed on both sides and ends of the bottom wall 21, respectively. These fold lines 221 and 231 connect the bottom wall 21 to the side walls 22 and end flaps 23. Slits 25 are provided at the edges of each side wall 22 to engage with the engaging tabs 33 of the bridge 30.

[0073] The plurality of bridge portions 30 are formed of a corrugated paper blank of the same shape with the direction from the upper end 32 to the lower end 31 being the corrugation direction. At positions corresponding to the engaging pieces 33 on both sides of the lower end 31, engaging grooves 35 are provided which face the engaging pieces 33 toward the upper end 32 and engage with the lower portion of the slit 25 of the side wall portion 22. Figure 7 As shown, an enlarged portion 34 is formed to extend laterally via the engagement piece 33. In addition, an enlarged portion is formed at the introduction portion at the lower end of each engagement groove 35 to facilitate engagement with the slit 25.

[0074] Furthermore, by bending the fold lines 221 on both sides of the bottom wall portion 21, the bottom wall portion 21 and the pair of side walls 22 on both sides form a groove shape having a second width w2 and extending in the longitudinal direction, and the engaging grooves 35 of the bridge portion 30 are engaged in each slit 25 to engage the engaging piece portion 33, thereby Figure 6 As shown in FIG. 1A , a pair of side walls 22 are bridged by each bridge portion 30 , and three adjacent sets of bridge portions 30 and side walls 22 form three socket portions 24 for holding the leg portion 14 of the first cushioning member 10 .

[0075] like Figure 5 and Figure 7 As shown, when the engaging piece 33 of the bridge portion 30 is engaged with the slit 25 of the side wall portion 22, a gap is formed between the lower end 31 of the bridge portion 30 and the bottom wall portion 21. In other words, the height from the upper end 32 to the lower end 31 of the bridge portion 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 bridge portion 30 and the bottom wall portion 21 in the engaged state.

[0076] In addition, if Figure 5 As shown, when the legs 14 of the first cushioning member 10 are inserted into the sockets 24 of the second cushioning member 20 and held until the upper ends of the bridges 30 abut against the back surface 12 of the first cushioning member 10, a gap is formed between the ends of the legs 14 and the bottom wall 21. In other words, the size of the legs 14 is determined so that a gap remains between the legs 14 and the bottom wall 21.

[0077] In this embodiment, the leg portion 14 of the first cushioning member 10 is held by the socket portion 24 of the second cushioning member 20, so that the first cushioning member 10 and the second cushioning member 20 are integrated. Therefore, no other connection or engagement is required between the first cushioning member 10 and the second cushioning member 20. Figure 9 As shown in (A), the end flap 23 of the second cushioning member 20 is joined to the end surface 13 of the first cushioning member 10 to form a joint 15. The corrugated direction of the end flap 23 is oriented in the width direction, so as shown in FIG. Figure 9 As shown in FIG. 1 (B), the first cushioning member 10 can be easily deformed in the height direction without hindering the elastic deformation of the first cushioning member 10 and the plastic deformation of the second cushioning member 20 (bridging portion 30).

[0078] (Shock Absorption Function of the Cushioning Member 41)

[0079] As described above, according to the configuration in which the cushioning member 41 (cushioning member assembly 40) including the first cushioning member 10 made of foam material and the second cushioning member 20 made of an assembly of corrugated paper is arranged adjacent to the side surface of the outboard motor 60 on the inner side of the side frame 52 of the packing frame 50, if the packing frame 50 falls sideways due to external factors during the transportation of the outboard motor 60 (packing frame 50) or during the cargo loading and unloading operation, and the outboard motor 60 falls to the side inside the packing frame 50, as shown in FIG. Figure 8 and Figure 9 As shown in (B), since the first buffer member 10 and the second buffer member 20 are located below the outboard motor 60', the impact load from the outboard motor 60' acts on the front face 11' of the first buffer member 10', the first buffer member 10' is locally elastically deformed while being pressed downward, and the bridge portion 30' of the second buffer member 20' is plastically deformed from the upper end 32' (first stage).

[0080] Furthermore, the locking piece portion 33' of the bridging portion 30' and the slit 25' or the slit bottom 253 of the side wall portion 22 undergo plastic deformation. When the bridging portion 30' descends, before the bridging portion 30' is crushed, the leg 14' of the first buffer member 10' will sit on the bottom wall portion 21 of the second buffer member 20, the elastic deformation of the leg 14' begins, and the plastic deformation of the bridging portion 30' proceeds in parallel (second stage).

[0081] Afterwards, due to the load of the outboard motor 60', the bridge portion 30' of the second buffer member 20 is crushed, and the main body and leg portions 14' of the first buffer member 10' are elastically and partially plastically compressed. Under the condition of bearing the static load of the outboard motor 60', the falling of the outboard motor 60' ends (third stage).

[0082] The above process is actually completed almost in an instant, but due to the difference in deformation mode between the elastic deformation of the first buffer member 10 composed of foam material and the plastic deformation of the second buffer member 20 composed of an assembly of corrugated paper, especially the synergistic effect of the plastic deformation of the second buffer member 20 delaying the elastic compression of the first buffer member 10 and slowing down the plastic deformation of the second buffer member 20, the breakage of the first buffer member 10 is avoided, and the impact absorption effect brought about by the elastic deformation of the first buffer member 10 and the plastic deformation of the second buffer member 20 can be maximized, which is beneficial in preventing damage to the outboard motor 60.

[0083] Furthermore, during the above-described process, not only does the first cushioning member 10 enter the groove defined between the side walls 22, 22 of the second cushioning member 20, thereby guiding the side surfaces of the first cushioning member 10, but the legs 14 of the first cushioning member 10 are also guided by the sockets 24 formed between the bridges 30 of the second cushioning member 20, thereby preventing positional displacement between the first cushioning member 10 and the second cushioning member 20. Furthermore, elastic deformation of the main body and legs 14 of the first cushioning member 10 is reliably guided between the side walls 22, 22 of the second cushioning member 20, and impact loads acting on the first cushioning member 10 are reliably input to the bridges 30 of the second cushioning member 20, thereby achieving the impact absorption effect as designed.

[0084] (Second embodiment)

[0085] then, Figure 10 (A) and (B) show a cushioning member 41 according to the second embodiment in which a recessed portion 122 extending in the width direction is formed on the back surface 12 of the first cushioning member 10 adjacent to the leg portion 14 .

[0086] By forming such a recess 122, a gap is naturally defined between the back surface 12 of the first cushioning member 10 and the upper end 32 of the bridge portion 30 of the second cushioning member 20. When an impact load acts on the first cushioning member 10, the upper end 32' of the bridge portion 30' is guided into the recess 122', and the plastic deformation of the bridge portion 30 is guided while adjacent to the base of the leg portion 14. This suppresses irregular deformation or breakage of the bridge portion 30, thereby being advantageous in achieving the impact absorption effect that is consistent with the design.

[0087] Furthermore, for the same reason, it is preferable that the recess 122 has an inclination in which the depth decreases as it moves away from the leg portion 14. Figure 10As shown in FIG. 1B , the upper end 32 ′ of the bridge portion 30 ′ is reliably guided to a position adjacent to the base of the leg portion 14 within the recess 122 ′, which is more advantageous in obtaining a shock absorbing effect consistent with the design.

[0088] Furthermore, as described above, since the recess 122 is a recess that guides the upper end 32′ of the bridge portion 30′ to a position adjacent to the base of the leg portion 14 in the initial stage, it is basically formed as a small recess, and the maximum depth of the recess 122 is a depth smaller than the gap between the lower end of the leg portion 14 of the first cushioning member 10 and the bottom wall portion 21 of the second cushioning member 20.

[0089] (Main components and effects)

[0090] The cushioning member according to the present invention has the following features and effects.

[0091] (1) In a basic scheme, a buffer member (41) is provided on the inner side of a side portion (52) of a packing frame (50) surrounding the packing object (60) in order to protect a packing object (60) fixed to an inner bottom portion (51, 54) of the packing frame 50, and comprises: a first buffer member (10) having a front side (11) arranged adjacent to the packing object (60) and a back side (12) opposite to the front side; and a second buffer member (20) having an upper end (32) abutting against the back side of the first buffer member and a bottom portion (21) provided on the side of the packing frame, wherein the first buffer member (10) is made of a foam material and the second buffer member (20) is made of an assembly of corrugated paper.

[0092] According to this configuration, when a large impact is applied due to external factors, the impact load acting on the cushioning member from the packaged object is mitigated by the elastic deformation of the first cushioning member formed of the foam material and absorbed by the plastic deformation of the second cushioning member formed of the assembly of corrugated paper. This suppresses breakage of the first cushioning member, particularly in the initial stage of breakage, and thus achieves a good cushioning effect.

[0093] Furthermore, compared with a case where the entire cushioning member is formed of a foam material, there is an advantage in that the amount of foam material used, which becomes industrial waste after use, can be reduced.

[0094] (2) In a preferred embodiment, the first buffer member (10) comprises: a main body having a first width (w1) and extending in the longitudinal direction; and a plurality of legs (14) protrudingly arranged at intervals in the longitudinal direction on the back side (12) of the main body, and on the other hand, the second buffer member (20) comprises: a bottom wall (21) extending in the longitudinal direction in a manner of forming a groove having a second width (w2) larger than the first width and extending in the longitudinal direction; a pair of side wall portions (22) continuous with both sides of the bottom wall portion (21) via a bending portion (221); and a plurality of bridging portions (30) bridging the pair of side wall portions at multiple locations at intervals in the longitudinal direction, and forming a socket portion (24) for holding the leg portion (14) in a state where the upper end (32) of the bridging portion abuts against the back side (12) of the first buffer member by two adjacent bridging portions among the plurality of bridging portions and the pair of side wall portions.

[0095] According to this structure, not only can the positional offset of the first buffer member and the second buffer member when an impact load is input be suppressed, the elastic deformation of the first buffer member can be reliably guided between a pair of side wall portions, and the plastic deformation of the bridge portion between the pair of side wall portions can be reliably guided, but also the plastic deformation of the bridge portion and the elastic deformation of the leg portion can be guided in the initial stage, thereby maximizing the impact absorption effect through synergistic action.

[0096] (3) In a further preferred embodiment, a gap is formed between the end of the leg portion (14) and the bottom wall portion (21) when the upper end (32) of the bridge portion (30) abuts against the back surface (12) of the first buffer member (10). According to this configuration, the elastic deformation of the leg portion can be delayed, and the plastic deformation of the bridge portion can be guided in the initial stage, thereby avoiding the breakage of the first buffer member and maximizing the impact absorption effect through synergistic action.

[0097] As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment, Various deformation|transformation and changes are possible within the range of this invention.

[0098] For example, in the above embodiment, three legs 14 are formed on the back surface 12 of the first cushioning member 10. However, 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 21 is too large, the elastic deformation of the leg 14 will be reduced accordingly. Therefore, the gap should be no more than 1 / 2 of the depth of the socket 24, and preferably no more than 1 / 3 of the depth of the socket 24.

[0099] In addition, in the above-described embodiment, the width of the leg portion 14 in the longitudinal direction of the first cushioning member 10 is 1 / 4 of the spacing of the interval without the leg portion, that is, the ratio of the leg portion to the spacing is 1:4, but this ratio may also be a ratio other than this. In addition, it is also possible to add a leg portion (foamed material portion) to the interval without the leg portion in the illustrated example. However, if the spacing ratio is too large, the elasticity of the leg portion will be insufficient. Conversely, if the leg portion (foamed material portion) ratio is too large, not only will the amount of foam material used increase accordingly, but the ratio of elastic deformation in the stage (second stage) where plastic deformation and elastic deformation occur in parallel will also increase, and the contribution rate of the plastic deformation of the bridge portion to the cushioning effect may be reduced.

[0100] In addition, the back surface 12 of the first buffer member 10 may be formed flat without providing the leg portion 14. In this case, as shown in FIG. Figure 9 As shown in FIG. 1A , the first cushioning member 10 can be held by the second cushioning member 20 by joining the end flap 23 of the second cushioning member 20 to the end surface 13 of the first cushioning member 10 to form a joining portion 15 .

[0101] In the above embodiment, the upper end 32 of the bridge portion 30 of the second cushioning member 20 is aligned with the upper end of the side wall portion 22. However, the upper end of the side wall portion 22 may extend upward beyond the upper end 32 of the bridge portion 30. While such an extension does not contribute to a reduction in material costs, as described above, in an embodiment without the leg portion 14, the first cushioning member 10 is reliably guided within the groove of the second cushioning member 20, thereby ensuring the effectiveness of preventing positional displacement.

[0102] In the above embodiment, the buffer member 41 is tilted along the bottom cover 61 which is the high strength portion of the outboard motor 60 and is arranged in the middle of the vertical frames 523, 523, but it can also be arranged in the middle of the vertical frames 523, 523. Figure 1 In this case, the buffer member 41 may be fixed directly to the inner side of the vertical frame 523 without passing through the base member 42.

[0103] In the above embodiment, the case where the outboard motor 60 is used as the packaging object is described. However, the buffer member 41 according to the present invention can also be implemented when other packaging objects, such as two-wheeled vehicles, are used as the packaging objects, which are not sufficiently self-supporting like the outboard motor but are fixed in an upright position in the packaging frame for transportation.

Claims

1. A cushioning member provided inside a side portion of a packing frame surrounding a packing object in order to protect the packing object fixed to the inner bottom of the packing frame, characterized in that: have: a first buffer member having a front surface disposed adjacent to the packaging object and a back surface opposite to the front surface; as well as a second buffer member having an upper end abutting against the back surface of the first buffer member and a bottom portion provided on the side of the packing frame; The first cushioning member is made of a foam material, and the second cushioning member is made of an assembly of corrugated paper.

2. The buffer member according to claim 1, wherein The first buffer member includes: a main body having the front surface and the back surface, having a first width and extending in the longitudinal direction; and a plurality of legs protruding from the back surface of the main body at intervals in the longitudinal direction. The second buffer member includes a bottom wall portion extending in the longitudinal direction so as to form a groove having a second width greater than the first width and extending in the longitudinal direction; A pair of side wall portions, which are continuous with both sides of the bottom wall portion via a bent portion; and a plurality of bridging portions, which bridge the pair of side wall portions at multiple locations with intervals in the longitudinal direction, and a socket portion that holds the leg portion in a state where the upper end of the bridging portion abuts the back surface of the first buffer member is formed by two adjacent bridging portions among the plurality of bridging portions and the pair of side wall portions.

3. The buffer member according to claim 2, wherein In a state in which the upper end of the bridging portion abuts against the rear surface of the first buffer member, a gap is formed between the end portion of the leg portion and the bottom wall portion.

4. The buffer member according to claim 3, wherein The leg portion of the first buffer member is arranged in the middle portion of the main body in the longitudinal direction excluding the two end portions, and the main body of the first buffer member has a recessed portion on the back side adjacent to the leg portion, and the recessed portion extends in the width direction so as to define a gap between the recessed portion and the upper end of the bridge portion.

5. The buffer member according to claim 4, wherein The recess has an inclination such that its depth decreases as it moves away from the leg portion. The buffer member according to claim 5 , wherein: The maximum depth of the recessed portion is smaller than the gap between the end portion of the leg portion and the bottom wall portion.

7. The buffer member according to claim 2, wherein The bridge portion includes a pair of engaging portions engaged with the pair of side walls to bridge the pair of side walls, and the engaging portions include engaging pieces extending laterally to engage with slits extending from upper ends of the side walls toward the bottom wall.

8. The buffer member according to claim 7, wherein The engaging piece of the bridge portion further includes an enlarged portion extending beyond the slit to form an engaging groove engaged with a lower portion of the slit of the side wall portion.

9. The buffer member according to claim 2, wherein The bottom wall portion and the pair of side wall portions of the second buffer member are formed by a first corrugated paper blank having the width direction perpendicular to the longitudinal direction as the corrugation direction, and the multiple bridge portions are formed by a plurality of second corrugated paper blanks having the direction from the upper end to the lower end as the corrugation direction.

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