Packing structure of vehicular seat

Abstract

To provide a packing structure of a vehicular seat that enables the seat to be packed and unpacked with good workability and enables the vehicular seats to be easily fixed.SOLUTION: A packing structure of a vehicular seat includes a fixing base 11 for fixing vehicular seats 9 onto a loading surface of a transportation member. The fixing base 11 is formed of corrugated boards. The fixing base 11 includes support frames arranged on the loading surface to support the seats 9 from below, and tether flaps 58 extending from the support frames. The tether flaps 58 are configured to be inserted from rear sides of the seats 9 into gap parts 90 between seat cushions 91 and seat backs 92 of the seats 9 to form anchor parts T for anchoring the rear parts of the seats 9.SELECTED DRAWING: Figure 8

Description

[Technical field]

[0001] The present invention relates to a packaging structure for a vehicle seat. [Background technology]

[0002] When vehicle seats are transported in transport containers (intermodal containers) to a distant destination (e.g. overseas), a packaging structure is adopted in which multiple seats are fixed to a returnable rack via a special mounting frame and then loaded into the transport container in that state to prevent the cargo from collapsing due to vibrations or shocks during transport.

[0003] The mounting frame is made of steel and is large and heavy, so it is delivered to the packaging site in several pieces and assembled before the seats are packaged. Each seat is bolted to the mounting frame using the bolt holes for mounting to the vehicle body. There are two bolt holes, one at the front and one at the back, on the left and right slide rails of the seat. Therefore, for example, after fixing the seat using the front bolt hole, it is necessary to slide the seat forward to access the rear bolt hole that is hidden by the seat. This sliding operation and bolt tightening operation must be repeated for each seat, and furthermore, at the destination, the unpacking work must be done in the reverse order, which is very time-consuming.

[0004] In addition, because returnable racks are versatile, it is preferable to use them to transport other items rather than sending them empty. In that case, it is desirable to collect the mounting frames as well, but due to time constraints and transportation costs, they are often not actually collected and end up as one-way (disposable) packaging materials.

[0005] Patent Document 1 discloses a packaging structure in which half of the sheets are stored in an upside-down position in order to improve the spatial storage capacity inside a packaging box. In the packaging structure described in Patent Document 1, the sheets are fixed to a steel mounting frame using multiple bolts. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent No. 3863863 Summary of the Invention [Problem to be solved by the invention]

[0007] In the packaging structure described in the above-mentioned Patent Document 1, bolt tightening is required to fix the sheet to the mounting frame. Therefore, problems remain such as the ease of packaging and unpacking, and the manufacturing and collection costs of the dedicated mounting frame, and improvements are desired.

[0008] The present invention has been made in consideration of the above-described circumstances, and its object is to provide a packaging structure for a vehicle seat that is easy to pack and unpack and can easily secure the seat. [Means for solving the problem]

[0009] According to one aspect of the present invention, in a packaging structure for a vehicle seat including a fixing base for fixing a vehicle seat onto a loading surface of a transport member, the fixing base is formed from cardboard material, and the fixing base includes a support frame that is positioned on the loading surface and supports the seat from below, and a tether flap extending from the support frame, and the tether flap is configured to be inserted from the rear side of the seat into a gap between the seat cushion and seat back of the seat to form a mooring portion for mooring the rear of the seat. Effect of the Invention

[0010] According to the present invention, it is possible to provide a packaging structure for a vehicle seat that allows good workability in packaging and unpacking and enables the seat to be easily fixed. [Brief description of the drawings]

[0011] [Figure 1] FIG. 1 is a perspective view showing a packaging structure for a vehicle seat. [Diagram 2] FIG. 2 is a perspective view showing a fixing base according to an embodiment. [Diagram 3] FIG. 3 is a perspective view showing the assembly of the fixing base. [Figure 4] FIG. 4 is a perspective view showing a process of loading sheets onto the fixing base. [Diagram 5] FIG. 5 is a perspective view showing a process of loading sheets onto the fixing base. [Figure 6] FIG. 6 is a diagram illustrating the configuration of the tether flap. [Figure 7] FIG. 7 is a perspective view showing a tether formed from a tether flap. [Figure 8] FIG. 8 is a side view showing a state in which the seat is fixed to the fixing base. [Figure 9] FIG. 9 is a partially enlarged view of FIG. [Figure 10] FIG. 10 is a perspective view showing a sheet secured by a tether. [Figure 11] FIG. 11 is a cross-sectional view taken along line AA in FIG. [Figure 12] FIG. 12 is a diagram showing a schematic cross-sectional shape of the mooring part. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

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

[0013] FIG. 1 shows a state in which a vehicle seat 9 is fixed and arranged on a pallet 8 of a returnable rack using a fixing base (fixing base assembly) according to one embodiment of the present invention. Removable outer frames 81, 82 are erected on the four sides of the pallet 8 to form a stackable returnable rack. In FIG. 1, the outer frame 81 of the first side (long side) on the front side has been removed. In FIG. 1, the short sides of the pallet 8 extend along a first direction FR, and the long sides extend along a second direction W. The first direction FR corresponds to the front-to-rear direction of the seat 9, and the second direction W corresponds to the width direction of the seat 9.

[0014] Pallet 8 is made of steel, and has openings at the bottom of its long sides for inserting the forks of a forklift. A flange 86 is provided along the top of the long sides of pallet 8, and engagement portions 83 that engage with the lower edge of first outer frame 81 are provided approximately at the center and both ends of this flange 86 in the second direction W.

[0015] Engagement portions 84 that engage with the lower edge of the second outer frame 82 are provided at approximately the center and both ends of the upper short sides of the pallet 8 in the first direction FR. These engagement portions 84 are structured so that when the first outer frame 81 is removed, the lower edge of the second outer frame 82 slides laterally (in the first direction FR) to engage with them, utilizing a space equivalent to the thickness of the first outer frame 81.

[0016] When the first outer frame 81 is placed in a predetermined position by the engagement parts 83 with the lower edge of the second outer frame 82 engaged by these engagement parts 84, the first outer frame 81 prevents the second outer frame 82 from moving laterally. This makes it impossible for the second outer frame 82 to be removed from the pallet 8, and when the first outer frame 81 is connected to the second outer frame 82 by the locking mechanism 85 on the upper part of the second outer frame 82, the first outer frame 81 also becomes impossible to be removed.

[0017] The pallet 8 (returnable rack) with the above configuration is a general-purpose transport equipment (RTI) and does not have a fixed structure for specific items on the loading surface. Therefore, in the past, vehicle seats were fixed with bolts using a steel mounting frame, but as mentioned above, since space is required to slide the seats back and forth, six seats (three sets) were fixed horizontally in three rows of two seats each in Figure 1.

[0018] In contrast, in one embodiment of the present invention shown in FIG. 1, two fixing bases 11 made of cardboard are used to fix eight vehicle seats 9 (four sets) in two rows of four seats each. The cardboard sheets used for each member (blank) constituting the fixing base 11 are paper cardboard (double-sided cardboard) with liners attached to both sides of a corrugated core. As described later, each member is constructed by folding one cardboard blank, and the fixing means for the seats are also integrally formed. Therefore, when fixing the seats, it is not necessary to slide the seats back and forth, and it is possible to arrange the seats close to each other in the front and rear. The fixing base 11 according to one embodiment of the present invention will be described below.

[0019] Fig. 2 is a perspective view showing the fixing base of this embodiment, and Fig. 3 is a perspective view showing the assembly of the fixing base, Fig. 4 and Fig. 5 are perspective views showing the process of loading sheets onto the fixing base.

[0020] 2 and 3, the fixing base 11 of this embodiment has a basic lattice structure in which four (two sets) of vertical members 12, 13 extending in a first direction FR and arranged in parallel on the loading surface of the pallet 8 and four (two sets) of horizontal members 14, 15 extending in a second direction W perpendicular to the first direction FR and arranged in parallel on the loading surface are combined with each other at their intersections. The basic structure of the fixing base 11 forms a support frame that supports the vehicle seat 9 from below.

[0021] Basically, each pair of vertical members (first and second vertical members) 12, 13 is disposed corresponding to the left and right seat rails 94 of each seat 9, and serves as a structural element supporting the weight of the seat 9. Meanwhile, each pair of horizontal members (first and second horizontal members) 14, 15 has a function of defining the distance between the vertical members 12, 13, and of holding the vertical members 12, 13, each having a vertically long rectangular cross section, in an upright position. Furthermore, the first horizontal member 14 disposed near the front end of the seat 9 provides a front end regulating portion 49 of the left and right seat rails 94, and the second horizontal member 15 disposed below the rear of the seat 9 provides a rear end regulating portion 59 of the left and right seat rails 94 and a tether flap 58 for anchoring the rear of the seat 9.

[0022] As described below, the vertical members 12, 13 and the horizontal members 14, 15 are each formed into a hollow rectangular tube by bending a single cardboard blank. The fitting portion at each intersection is basically composed of a pair of fitting grooves 24, 25, 34, 35 corresponding to the left and right side walls of the vertical members 12, 13 and the front and rear side walls of the horizontal members 14, 15.

[0023] The folded portion of the cardboard cannot maintain the folded angle against external forces by itself, but by fitting the vertical members 12, 13 and the horizontal members 14, 15 together, the cross-sectional shapes of each are finally fixed and deformation into a parallelogram due to vertical or lateral loads is prevented. Each pair of fitting grooves 24, 25, 34, 35 is not formed in only one of the vertical members 12, 13 or the horizontal members 14, 15, but is formed in each so that they share the cross section and complement each other's cross-sectional shapes, forming complementary fitting portions.

[0024] The upper surfaces (21, 31) of the vertical members 12, 13 provide a placement surface on which the seat rails 94 of the vehicle seat 9 are placed. In the illustrated embodiment, a configuration is adopted in which one fixing base 11 is used to load four vehicle seats 9, with two rows and two seats. Here, the vertical member 12 near the center in the width direction W is higher than the vertical members 13 on both sides in correspondence with a seat with different heights on the left and right seat rails, for example, a seat in which the seat rails on the center side of the vehicle are attached to the floor tunnel of the vehicle body and the seat rails near the left and right doors are attached to the vehicle body floor, and correspondingly, each of the horizontal members 14, 15 has a different height of the upper surface near the center in the width direction W and on both sides, and has a high surface near the center. In other words, a pair of left and right seats 9 can be fixed in the same layout as when they are attached to the vehicle body.

[0025] The bottom surface of each of the horizontal members 14, 15 is disposed on the same plane as the bottom surface of each of the vertical members 12, 13, so that a part of the load of the sheet 9 that the vertical members 12, 13 carry on their upper surfaces (21, 31) is distributed to the horizontal members 14, 15 via the fitting portions (24, 25, 34, 35). The specific configurations of the vertical members 12, 13 and the horizontal members 14, 15 will be described below in order.

[0026] (Vertical member) The vertical members 12, 13 are formed into a rectangular tube extending in the longitudinal direction by folding a single cardboard blank, whose flute direction FL is a direction intersecting with each of the longitudinal directions (first direction FR), along fold lines (creases, scores) parallel to the longitudinal direction.

[0027] The vertical members 12, 13 are each formed into a rectangular tube shape consisting of double walls, with both side walls and the top wall 21, 31 except for the bottom wall, by bending the blank around the bottom wall so that the outer wall and outer top wall (top surface) 21, 31 overlap the outer surface of the respective inner wall and inner top wall.

[0028] The blanks of the vertical members 12 and 13 are punched out from a cardboard sheet. At that time, the fitting grooves 24, 25, 34, and 35 constituting the respective fitting parts, the fitting grooves 26 and 36 for fitting the front and rear end members 16 described later, the division lines (notches) for forming the rail rear end regulating parts 27 and 37, and the through grooves 241 and 341 for fixing the front end of the seat rail with a cable tie or the like are formed, and fold lines (creases, scores) are also processed.

[0029] In each fitting portion, the bottom wall of the vertical members 12, 13 is removed to form an opening or a notch. The width of each fitting groove 24, 25, 34, 35 corresponds to the thickness of two cardboard sheets so that it can be fitted into the side wall of the corresponding fitting portion and clamped. Furthermore, an enlarged introduction edge is formed at the introduction side end of each fitting groove 24, 25, 34, 35.

[0030] In addition, no fold lines (creases) that define the bottom wall are provided in the rail rear end regulating parts 27, 37. Therefore, when the vertical members 12, 13 are formed, the rail rear end regulating parts 27, 37 rise continuously from the side walls in a double inner and outer shape without any bent parts.

[0031] That is, the rail rear end regulating parts 27, 37 are side wall parts extending upward from the respective side walls (and inner side walls) of the vertical members 12, 13. In particular, by providing such extended side wall parts (27, 37) in the longitudinal center parts of the vertical members 12, 13 where the fitting grooves 25, 35 with the second horizontal member 15 corresponding to the front row seats and the fitting grooves 24, 34 with the first horizontal member 14 corresponding to the rear row seats are formed close to each other, there is an advantage that the second horizontal member 15 on the front side and the first horizontal member 14 on the rear side can be arranged close to each other while suppressing a decrease in strength of the side walls in this part.

[0032] Since the upper surfaces of the upper walls 21, 31 of the vertical members 12, 13 become the support surfaces for the seat rails 94 of the vehicle seat 9, the widths of the upper walls 21, 31 are set corresponding to the widths of the seat rails 94. For example, the width of the upper wall 31 (21) can be approximately the same as the width of the seat rails 94 (the lower rails 96 of the slide rails), but can be set within a range of approximately 80 to 150% of the width of the seat rails 94.

[0033] The height of the side walls of each vertical member 12, 13 is not particularly limited, but it is preferable that the height be set to more than twice the width of the upper wall 31 so that when the engagement grooves 34, 35 of the lower vertical member 13 are formed to approximately 50% of the height of the side walls, a side wall approximately the same width as the upper wall 31 remains in the remaining portion.

[0034] (1st horizontal member) The first horizontal member 14 is also formed into a rectangular tube shape extending in the longitudinal direction by folding a single cardboard blank, whose flute direction FL is a direction intersecting the longitudinal direction (second direction W), along fold lines (creases, scores) parallel to the longitudinal direction. However, the first horizontal member 14 has two cross-sectional shapes with different heights, separated by steps, near the center and on both sides in the second direction W.

[0035] The first cross member 14 has a front wall and a rear wall folded at right angles in front of and behind the bottom wall of the blank 14, and further has an upper wall (outer upper wall) folded from the front wall to the rear layered on top of an inner upper wall folded from the rear wall to the front, and a locking piece of the front wall engages with a slit in the inner upper wall, so that the upper wall is formed as a double wall and into a square tube shape having a step.

[0036] The bottom wall of the first horizontal member 14 is disposed on the same plane as the bottom walls of the vertical members 12 and 13. The upper wall of the first horizontal member 14 is located higher than the upper wall 21 of the vertical member 12 on the high side, and higher than the upper wall 31 of the vertical member 13 on the low side. As a result, an edge portion that regulates the lateral position of the front end portion of the seat rail 94 of the vehicle seat 9 is defined at the upper portion of each fitting portion (46, 47). In addition, a rail front end regulating portion 49 that extends upward beyond the upper walls 21, 31 of the vertical members 12, 13 is defined at the middle portion of each pair of fitting grooves 46, 47 in the front wall of the first horizontal member 14.

[0037] In addition, three openings 420 are formed in the front wall of the first horizontal member 14, for inserting the clamped portions 68 of the end members 16 described later, in the first horizontal member 14 located at the forefront. Although such openings 420 are not necessary in the first horizontal members 14 other than the forefront one, all the first horizontal members 14 are formed in the same shape in order to reduce costs by standardizing parts.

[0038] As described above, the horizontal members 14, 15 have the function of determining the distance between the vertical members 12, 13, and of holding the vertical members 12, 13, which have a vertically long rectangular cross section, in an upright position, and are not required to directly support the weight of the sheet 9. Therefore, strength against compressive forces from both sides and stability on the loading surface of the pallet 8 are more important than strength against compressive forces from above. Therefore, the horizontal members 14, 15 are designed to have a larger rectangular tubular cross section than the vertical members 12, 13, thereby ensuring compressive strength and stability.

[0039] (2nd horizontal member) The second horizontal member 15 is also formed into a rectangular tube extending in the longitudinal direction by folding a single cardboard blank, whose flute direction FL is a direction intersecting the longitudinal direction (second direction W), along fold lines (creases, scores) parallel to the longitudinal direction. Similar to the first horizontal member 14, the second horizontal member 15 has two cross-sectional shape parts with different heights between the center part and both side parts in the second direction W, separated by steps.

[0040] The blank of the second cross member 15 further integrally includes a tether flap 58. That is, the second cross member 15 and the tether flap 58 are formed from a single blank.

[0041] The second horizontal member 15 has a front wall and a rear wall folded at right angles in front of and behind the bottom wall of the blank, an upper wall folded rearward from the upper edge of the front wall, and an inner rear wall folded downward from the rear edge of the upper wall overlapping the inside of the rear wall. Lock pieces extending from the rear wall on both sides of the tether flap in the second direction W are inserted into holes in the upper wall, so that the rear wall of the second horizontal member 15, which is the starting point of the tether flap 58, is formed into a quadrangular tube shape having a stepped portion and composed of a double wall.

[0042] As with the first horizontal member 14, the bottom wall of the second horizontal member 15 is disposed on the same plane as the bottom walls of the vertical members 12 and 13. The upper wall of the second horizontal member 15 is located higher than the upper wall 21 of the vertical member 12 on the high side, and higher than the upper wall 31 of the vertical member 13 on the low side. As a result, an edge portion that regulates the lateral position of the rear end portion of the seat rail 94 of the vehicle seat 9 is defined at the upper portion of each fitting portion (56, 57). In addition, a rail rear end regulating portion 59 that extends upward from the upper walls 21 and 31 of the vertical members 12 and 13 is defined at the intermediate portion of each pair of fitting grooves 56 and 57 on the rear side wall and the inner rear side wall of the second horizontal member 15.

[0043] (Tether flap for seat anchoring) As shown in Fig. 2, the shapes of the two tether flaps 58 arranged on the left and right in the second direction W are symmetrical, so here, the right tether flap 58 will be described as an example. Fig. 6 is a perspective view of the tether flap 58 arranged on the right side in Fig. 2, as viewed from the rear (R). The tether flap 58 extends from the second horizontal member 15 in the extension direction and is formed integrally with the second horizontal member 15. The tether flap 58 is a wide member having a width in a cross direction (second direction W) perpendicular to the extension direction.

[0044] The tether flap 58 extends in an extension direction that coincides with the flute direction FL, and has a base portion 581, an intermediate portion 582, and a tip portion 583 that are continuous with the rear side wall of the second horizontal member 15 via fold lines. The tip portion 583 has four portions divided by fold lines (rules, scores), that is, a first portion 58a, a second portion 58b, a third portion 58c, and a fourth portion 58d from the tip side in the extension direction of the tether flap 58. A lock piece 584 is formed on both sides of the fourth portion 58d by a pair of division lines (notches), and a notch portion 585 corresponding to the lock piece 584 is formed on both sides of the first portion 58a.

[0045] Furthermore, protrusions 586 protruding in the extension direction are formed at both widthwise ends of the tip of the first portion 58a, and cutouts 587 corresponding to the protrusions 586 are formed on both side portions between the third portion 58c and the fourth portion 58d. Notches 588 are formed on both side portions between the first portion 58a and the second portion 58b, both side portions between the second portion 58b and the third portion 58c, and both side portions between the fourth portion 58d and the intermediate portion 582. The notches 588 are intended to facilitate bending of the tether flap 58, which will be described later.

[0046] The base portion 581 is tapered in width to form the locking piece described above at the base end side that is continuous with the rear side wall of the second horizontal member 15. In other words, the base portion 581 extending from between the locking pieces is widened, thereby ensuring a desired width for the tether flap 58.

[0047] As described later, the tether flap 58 is configured to be inserted from the rear into a gap 90 between the rear of the seat cushion 91 and the lower part of the seat back 92 after the left and right seat rails 94 of the vehicle seat 9 are placed and positioned on the upper surfaces of the vertical members 12, 13, and to form a mooring part T for mooring the rear of the vehicle seat 9 to the fixing base 11 on the front side of the seat back 92. The mooring part T will be described later.

[0048] (End member for fixing the base) The fixing base 11 having the above-described basic structure is provided with end members 16 at the front and rear ends in the first direction FR for providing clamped portions 68 for fixing the fixing base 11 to the pallet 8. The end members 16 are standardized at the front and rear ends of the fixing base 11 for the purpose of reducing costs through standardization of parts.

[0049] End member 16 has a multi-layer structure having four layers, that is, an upper surface, a lower surface, an upper inner core, and a lower inner core, formed by folding and stacking a single corrugated board blank with a flute direction FL intersecting the longitudinal direction (second direction W) along fold lines (creases) extending parallel to the longitudinal direction. The upper and lower surfaces constituting clamped portion 68 are continuous via a folded portion at tip surface 61 extending in the stacking direction.

[0050] The end member 16 has mating grooves 66, 67 formed on the edge opposite the protruding direction of the clamped portion 68 including the three tip portions 61, which correspond to the mating grooves 26, 36 at the front and rear ends of the vertical members 12, 13, respectively, and are mated with them from the front and rear.

[0051] (Assembly of the fixing base) As described above, when assembling the fixing base 11 from the vertical members 12, 13, horizontal members 14, 15, and end member 16, each of which is constructed by bending a cardboard blank, the following steps are taken, for example. In this example, the first horizontal member 14 at the forefront is not assembled in advance, but is assembled last by fitting it to the vertical members 12, 13, as described later.

[0052] First, as shown in FIG. 3, the mating grooves 24, 25 of the two central vertical members 12 and the mating grooves 34, 35 of the two side vertical members 13 are fitted from above into the mating grooves 56, 46, 56 and 57, 47, 57 of the three horizontal members 15, 14, 15, excluding the front first horizontal member 14.

[0053] Next, the fitting grooves 66, 67 of the front and rear end members 16, 16 are fitted from the front and rear into the fitting grooves 26, 36 at the front and rear ends of the vertical members 12, 13, respectively, to assemble the front and rear end members 16, 16 to the vertical members 12, 13.

[0054] Finally, the rear side wall and the inner upper wall are folded against the bottom wall of the frontmost first horizontal member 14 in an unassembled state to produce a semi-assembled state, and the fitting grooves 46, 47 are fitted from below into the fitting grooves 24, 34 in the front ends of the vertical members 12, 13. The clamped portion 68 of the end member 16 at the front end is inserted through the opening 420 of the first horizontal member 14, and the front side wall and the upper wall of the first horizontal member 14 are folded so as to roll up the end member 16, and the lock piece of the upper wall is engaged with the slit in the inner upper wall, completing the assembly of the first horizontal member 14 and its attachment to the vertical members 12, 13. This completes the assembly of the fixing base 11.

[0055] As shown in Fig. 2, when the assembled fixing base 11 is folded forward with each tether flap 58, it becomes flat, and is lightweight and not bulky even in the assembled state, which has the advantage of allowing for low-cost storage and transportation. Therefore, it may be delivered to the packaging location for the vehicle seat 9 in a pre-assembled state. In addition, since it can be easily assembled without requiring special equipment or tools, it may be delivered to the packaging location in a blank state and assembled at the packaging location.

[0056] (Installation of the fixing base on the pallet and loading of the sheets) At the packaging location of the vehicle seat 9, first, the two fixing bases 11 are placed side by side on the loading surface of the pallet 8. The length of each of the vertical members 12, 13 of each fixing base 11 is dimensioned so that it fits the length of the short side of the loading surface of the pallet 8, and the length of each of the horizontal members 14, 15 is dimensioned so that it is 1 / 2 the length of the long side of the loading surface of the pallet 8, that is, the total length of each of the horizontal members 14, 15 of the two fixing bases 11 fits the length of the long side of the loading surface. Therefore, when the two fixing bases 11 are placed side by side on the loading surface of the pallet 8, the movement of each fixing base 11 in the front-rear direction FR (first direction) and the lateral direction W (second direction) is restricted.

[0057] In this state, the clamped portions 68 of the end members 16 protruding from the front and rear ends of the vertical members 12, 13 of each fixing base 11 extend onto the protruding edges 86 of the long sides of the pallet 8, as shown in Figures 1 and 4.

[0058] Next, the tether flaps 58 of each fixing base 11 are folded backward and removed from the seat placement space. Then, the seats 9 are lifted up using a hanger (not shown) or the like, and the seats 9 are loaded on the front placement surface, which is the furthest away, of the eight seat placement surfaces in two rows, front to back, in that order, followed by the rear placement surface, and so on, followed by the front and rear placement surfaces on the proximal side.

[0059] That is, the posture of the seat 9 is aligned with the direction of the mounting surface of the fixing base 11, and the front ends of the left and right seat rails 94 are regulated by the front end regulating parts 49 and inserted into the lateral position regulating parts (upper parts of the fitting parts 46, 47). As a result, the left and right seat rails 94 are positioned and mounted at predetermined positions between the front end regulating parts 49 and the rear end regulating parts 59 on the mounting surfaces of the vertical members 12, 13. In this state, the front-rear direction of the seat 9 coincides with the first direction FR of the fixing base 11, and the width direction of the seat 9 coincides with the second direction W of the fixing base 11.

[0060] In this state, the cable ties 241b, 341b are inserted into the through grooves 241, 341 of the vertical members 12, 13, and the front ends of the seat rails 94 are fixed to the vertical members 12, 13, as shown in Figures 4 and 5. At this time, in order to protect the front ends of the seat rails 94 of each seat 9, a cushion sheet or the like may be interposed between the front ends and the fitting portions 46, 47.

[0061] 5, the tether flap 58 is inserted from the rear into the gap 90 between the rear part of the seat cushion 91 and the lower end part of the seat back 92. Then, at the front side of the seat back 92, as shown in FIG. 4, the tip 583 of the tether flap 58 is bent to form a triangular tubular sleeve (anchoring part) T.

[0062] Fig. 7 shows a perspective view of the mooring portion T formed from the tether flap 58. The tether flap 58 inserted into the gap 90 from the rear side of the vehicle seat 9 is bent and shaped at the front side of the seat back 92 to form the mooring portion T. Specifically, the tip 583 of the tether flap 58 shown in Fig. 6 is valley-folded along the fold line (ruled line) to overlap the first portion 58a with the fourth portion 58d, and the first portion 58a (fourth portion 58d), the second portion 58b, and the third portion 58c form a triangular tubular sleeve.

[0063] The lock piece 584 of the fourth portion 58d is bent upward and engaged with the notch 585 of the first portion 58a, and the protrusion 586 of the first portion 58a is inserted into the notch 587 between the third portion 58c and the fourth portion 58d, thereby locking the triangular tube shape. The triangular tube sleeve has an enlarged triangular cross section when viewed from the intersecting direction (second direction W) perpendicular to the extending direction of the tether flap 58, and cannot pass through the gap 90. As a result, the triangular tube sleeve functions as a mooring part T that moor the rear part of the vehicle seat 9 to the second horizontal member 15.

[0064] This operation makes it impossible for the tip 583 of the tether flap 58 to come out of the gap 90 , and the rear part of the seat 9 is anchored to the second horizontal member 15 , i.e., the fixing base 11 , by the tether flap 58 .

[0065] Since the fore-aft and lateral positions of the front and rear ends of the left and right seat rails 94 are restricted, the seat 9 is tethered to the second cross member 15 by the tether flap 58, and is fixed onto the fixing base 11 by preventing it from moving upward, i.e., "floating."

[0066] The above process is repeated to fix eight vehicle seats 9 (four seats x two rows, four sets) to the fixing base 11, and then a resin sheet is placed over the entire eight seats 9. Although not shown in the drawings, each seat 9 is covered in advance with a bag-shaped resin sheet.

[0067] 1, the lower edge of the second outer frame 82 is engaged with the engaging portion 84 on the short side of the pallet 8. Next, the lower edge of the first outer frame 81 is engaged with the engaging portion 83 and placed in a predetermined position. With each clamped portion 68 of the end member 16 clamped between the lower edge adjacent to the engaging portion 83 and the protruding edge 86 of the pallet 8, the first outer frame 81 is connected to the second outer frame 82 by the upper locking mechanism 85, and the pallet 8 and the first outer frame 81 and second outer frame 82 are integrated to form a returnable rack.

[0068] Through the above operation, the clamped portion 68 is finally clamped between the protruding edge 86 of the pallet 8 and the lower edge of the first outer frame 81, restricting the upward movement of each fixing base 11 and restricting its movement in the front-to-rear direction FR on the pallet 8. Furthermore, the second outer frame 82 of the pallet 8 restricts the movement of each fixing base 11 in the lateral direction W. As a result, a packaging structure 100 is formed in which eight sheets 9 fixed to two fixing bases 11 are fixedly loaded at predetermined positions in the returnable rack constituted by the pallet 8 and the first outer frame 81 and second outer frame 82.

[0069] In the above-mentioned packaging structure 100, the fixing of each fixing base 11 to the pallet 8 is completed by the normal work of constructing a returnable rack on the pallet 8. Furthermore, by configuring the end member 16 on which the clamped portion 68 is formed to be fitted to the front end and rear end of each of the vertical members 12, 13 from the front and rear directions, there is an advantage that the end member 16 is prevented from coming off due to an external force that tends to move the fixing base 11 upward. Another advantage is that the removal of each fixing base 11 from the pallet 8 is completed by the normal work of disassembling the returnable rack.

[0070] (Fixing vehicle seats with mooring parts) As described above, the fixing base 11 according to this embodiment is configured so that the vehicle seat 9 is fixed to the fixing base 11 by the mooring portion T formed by bending the tether flap 58. The configuration of the mooring portion T for reliably fixing the vehicle seat 9 will be described in detail below.

[0071] Fig. 8 is a side view showing a state in which the vehicle seat 9 is fixed to the fixing base 11, and Fig. 9 is an enlarged view of a portion X in Fig. 8. Fig. 10 is a perspective view of the vehicle seat 9 fixed by the mooring part T, and Fig. 11 is a cross-sectional view taken along line AA in Fig. 10.

[0072] First, the configuration of the vehicle seat 9 will be described.

[0073] 8 to 10, the vehicle seat 9 includes a seat cushion 91, a seat back 92, and a gap 90 provided between a rear portion 91a of the seat cushion 91 and a lower end portion 92a of the seat back 92. The lower portion of the seat back 92 has a curved portion 92b that is convex toward the seat cushion 91. The curved portion 92b extends from the lower end portion 92a to an upper end 92c in the lower portion of the seat back 92.

[0074] As shown in Fig. 10, the seat back 92 is configured to have first and second bulging portions 92d, 92e provided on both sides of the seat 9 in the width direction W and bulging forward (F) of the seat 9, and a flat portion 92f provided between the first bulging portion 92d and the second bulging portion 92e so that the occupant can sit in a stable position. The seat back 92 is configured, for example, by attaching a seat back pad as a cushioning material to a seat back frame made of a metal pipe material, and covering the surface of the seat back pad with a seat back trim. At the boundary between the flat portion 92f and the first and second bulging portions 92d, 92e, there are seams of the seat back trim.

[0075] As described above, the tether flap 58 is inserted from the rear into the gap 90 between the rear portion 91a of the seat cushion 91 and the lower end portion 92a of the seat back 92, and is bent to form the mooring portion T. As shown in FIG. 8, with the mooring portion T formed on the seat cushion 91, the base portion 581 of the tether flap 58 is configured to extend along the up-down direction H of the seat 91. That is, the position of the base portion 581 of the tether flap 58 in the first direction FR is disposed to coincide with the position of the rear end of the gap 90. When the tip portion 583 of the tether flap 58 is inserted into the gap 90, the base portion 581 extends upward continuously from the rear side wall of the second horizontal member 15, and the middle portion 582 is folded at the fold line between the middle portion 582 and the base portion 581 to extend forward (F) of the seat 91.

[0076] By arranging the position of the base 581 of the tether flap 58 in the first direction FR so as to coincide with the position of the rear end of the gap 90, the distance from the base end of the tether flap 58 to the entrance of the gap 90 of the seat 9, i.e., the length in the extending direction of the base 581 of the tether flap 58, can be minimized. As a result, when the mooring part T is formed, no bending occurs on the base end side of the tether flap 58, and the vehicle seat 9 can be reliably fixed to the fixing base 11 by the mooring part T. In addition, since the base 581 of the tether flap 58 extends only the shortest distance in the vertical direction, it is possible to prevent the tether flap 58 from loosening or tearing due to vibration during transportation when the packaged vehicle seat 9 is transported.

[0077] Next, the configuration of the mooring part T will be described in detail.

[0078] The mooring portion T is configured as a triangular tubular sleeve including a first surface T1 facing the seat cushion 91, a second surface T2 facing the seat back 92, and a third surface T3. That is, the mooring portion T has a triangular cross section when viewed from a cross direction (second direction W) perpendicular to the extending direction of the tether flap 58 (see FIG. 12). The first surface T1 is designed to face the seat cushion 91 and to be in at least partial surface contact with the surface of the seat cushion 91, and the second surface T2 is designed to face the seat back 92 and to be in at least partial surface contact with the curved portion 92b.

[0079] 9, the outer dimension L1 of the mooring part T is designed to be larger than the gap dimension L2 of the gap 90. Here, the outer dimension L1 of the mooring part T is the height from the lower end to the upper end of the mooring part T, that is, the height from the base (first face T1) of the triangle to the apex Tp. The gap dimension L2 of the gap 90 is the distance from the surface of the seat cushion 91 to the lower end 92a of the seat back 92. By designing the mooring part T in this way, the mooring part T cannot be removed from the gap 90, and the rear part of the seat 9 can be fixed to the fixing base 11 by the mooring part T.

[0080] Further, the dimensions of the mooring portion T are set in detail so that the mooring portion T does not leave any scratches on the seat back 92, such as contact marks or friction marks.

[0081] For example, the upper end Tp of the mooring portion T is set to be higher than the upper end 92c of the curved portion 92b of the seat back 92. That is, the height L1 from the lower end to the upper end of the mooring portion T is designed to be larger than the height L3 from the surface of the seat cushion 91 to the upper end 92c of the curved portion 92b. Since the second surface T2 of the mooring portion T extends to a position higher than the upper end 92c of the curved portion 92b of the seat back 92, a large contact area between the second surface T2 and the seat back 92 can be secured. This makes it possible to prevent the upper end Tp of the mooring portion T, i.e., the boundary portion between the second surface T2 and the third surface T3, from leaving a contact mark on the seat back 92, for example, when the mooring portion T is pulled backward by an external force. In addition, the notch 588 formed at the boundary portion between the second surface T2 and the third surface T3 can be expected to facilitate bending and to have the effect of making it difficult for a contact mark to be left.

[0082] As shown in FIG. 11, the second surface T2 of the mooring portion T is configured to face the flat portion 92f between the first bulging portion 92d and the second bulging portion 92e of the seat back 92. The length of the mooring portion T in the cross direction (second direction W) is set to be approximately the same as the length of the flat portion 92f of the seat back 92 in the width direction of the seat 9. Specifically, both ends of the mooring portion T in the second direction W are disposed to be approximately the same as both ends of the flat portion 92f of the seat back 92 in the second direction W. Seams of the seat back trim exist at the boundary between the flat portion 92f and the first and second bulging portions 92d, 92e. Therefore, both ends of the mooring portion T are disposed in accordance with the seams of both ends of the flat portion 92f of the seat back 92.

[0083] Since the mooring portion T does not come into contact with the first bulging portion 92d and the second bulging portion 92e of the seat back 92, it is possible to prevent the mooring portion T from locally interfering strongly with the first bulging portion 92d and the second bulging portion 92e. Since the mooring portion T comes into contact with the flat portion 92f of the seat back 92 at the second surface T2 having a large area, it is possible to disperse the impact acting on the seat back 92 from the second surface T2. By arranging both ends of the mooring portion T in accordance with the seams at both ends of the flat portion 92f of the seat back 92, it is possible to prevent the mooring portion T from leaving a contact mark on the seat back 92, for example, when the mooring portion T is pulled rearward by an external force.

[0084] Fig. 12 is a diagram showing a schematic cross-sectional shape of the mooring part T. As shown in Fig. 12, the first face T1, the second face T2, and the third face T3 of the mooring part T correspond to the first side S1, the second side S2, and the third side S3 of the triangle, respectively. The length of the second side S2 is greater than the length of the first side S1, and the length of the third side S3 is greater than the length of the first side S1. In addition, the angle θ1 between the first side S1 and the second side S2 is greater than the angle θ2 between the second side S2 and the third side S3.

[0085] By appropriately setting the angle θ1, the second surface T2 of the mooring portion T can be extended along the curved portion 92b of the seat back 92. That is, the second side S2 of the mooring portion T and the tangent line of the curved portion 92b can be made closer to parallel. As a result, for example, when the mooring portion T is pulled rearward by an external force, the angle between the surface of the curved portion 92b and the second surface T2 of the mooring portion T can be made smaller, and the second surface T2 can be reliably brought into contact with the curved portion 92b. This can prevent the second surface T2 from locally coming into contact with the seat back 92 and leaving a contact mark.

[0086] The cross section of the mooring portion T is preferably an isosceles triangle with the first side S1 as the base, but is not limited to this, and the length of the third side S3 may be greater or less than the length of the second side S2.

[0087] (Shape maintenance mechanism for mooring part) The mooring portion T has a shape maintaining mechanism (lock mechanism) for maintaining the triangular tube shape. The shape maintaining mechanism has a first mechanism for engaging the first portion 58a and the fourth portion 58d of the tether flap 58. In the mooring portion T, the first portion 58a of the tether flap 58 is disposed on top of the fourth portion 58d, and the first portion 58a and the fourth portion 58d form a triangular first surface T1. The first mechanism has lock pieces 584 formed on both sides of the fourth portion 58d and notches 585 formed on both sides of the first portion 58a, and is configured to fix the first portion 58a and the fourth portion 58d by bending the lock pieces 584 upward and inserting them into the notches 585 as shown in FIG. 7.

[0088] By engaging the first part 58a and the fourth part 58d by the first mechanism, the triangular tube shape of the mooring part can be maintained even if an external force is applied and the mooring part T is pushed forward or pulled backward. Even if the mooring part T moves in the vertical direction, the triangular tube shape of the mooring part can be maintained by engaging the first part 58a and the fourth part 58d. The width of the lock piece 584 is substantially the same as the width of the cutout part 585, but by making the width of the lock piece 584 slightly larger than the width of the cutout part 585, the lock piece 584 can be made less likely to fall out of the cutout part 585.

[0089] The lock piece 584 of the fourth portion 58d is configured to be fitted into the cutout portion 585 of the first portion 58a so as to be contained within the internal space of the mooring portion T without protruding from the internal space. This makes it possible to prevent the tip of the lock piece 584 from protruding from the internal space of the mooring portion T and coming into contact with the seat cushion trim of the seat cushion 91, thereby protecting the seat cushion 91.

[0090] The shape maintaining mechanism further includes a second mechanism having a protruding portion 586 protruding from the tip of the first portion 58a and a notch portion 587 formed at the boundary between the third portion 58c and the fourth portion 58d. The second mechanism is configured to fit and lock the protruding portion 586 of the first portion 58a into the notch portion 587 between the third portion 58c and the fourth portion 58d when bending the tether flap 58. When the second surface T2 of the mooring portion T abuts against the seat cushion 91 and the mooring portion T is pushed forward or pulled backward, the mooring portion T moves so as to fall forward starting from the boundary between the third portion 58c and the fourth portion 58d, i.e., the boundary between the third surface T3 and the first surface T1. At this time, the third surface T3 and the first surface T1 press down the protruding portion 586 of the first portion 58a, preventing the protruding portion 586 from slipping out of the cutout portion 587. This makes it possible to maintain the triangular cylindrical shape of the mooring portion.

[0091] Moreover, the mooring portion T is set so that the length of the second side S2 of the triangle corresponding to the second surface T2 is greater than the length of the first side S1 of the triangle corresponding to the first surface T1. Since the length of the first side S1 is small, that is, the area of ​​the first surface T1 is small, bending or deformation is unlikely to occur in the first surface T1 even if the mooring portion T is subjected to shaking or vibration. In particular, since the above-mentioned lock pieces 584 are installed on both sides of the first surface T1 in the second direction W, the area of ​​the first surface T1 is further reduced by the amount of the lock pieces 584. This makes it possible to suppress deformation in the first surface T1 and maintain the triangular tube shape of the mooring portion.

[0092] The packaging structure for the vehicle seat 9 according to the present embodiment described above can provide the following advantageous effects. (1) The packaging structure for a vehicle seat 9 includes a fixing base 11 for fixing the vehicle seat 9 on the loading surface of a transport member. The fixing base 11 is made of corrugated cardboard and includes a support frame that is placed on the loading surface and supports the seat 9 from below, and a tether flap 58 that extends from the support frame. The tether flap 58 is configured to be inserted from the rear side of the seat 9 into a gap 90 between a seat cushion 91 and a seat back 92 of the seat 9 to form a mooring part T for mooring the rear part of the seat 9.

[0093] This allows the sheet 9 to be easily fixed to the fixing base 11 by utilizing the structure of the fixing base 11 itself, which is formed from cardboard. By forming the mooring portion T with the tether flap 58 inserted from the rear side of the sheet 9 and configuring it to moor (hold, fix) the sheet 9, it is possible to restrict the upward and rearward movement of the sheet 9. Since there is no need to tighten the bolts to fix the sheet to the mounting frame as in the conventional technology, or to repeatedly slide the sheet for this purpose, the workability during packaging is significantly improved. Another advantage is that the workability during unpacking at the destination is also significantly improved.

[0094] (2) Mooring portion T is formed by bending tether flap 58, inserted from gap 90, from the tip end side to the base end side in the extension direction of tether flap 58, and is designed so that outer dimension L1 of mooring portion T is larger than gap dimension L2 of gap 90. Mooring portion T can be easily formed by bending tether flap 58. Since outer dimension L of mooring portion T is larger than gap dimension L2 of gap 90, mooring portion T can be prevented from slipping out of gap 90 even if, for example, mooring portion T is pulled backward.

[0095] (3) The mooring portion T has at least a first surface T1 designed to face the seat cushion 91 and a second surface T2 designed to face the seat back 92, and is formed by a tether flap 58 folded so that its cross section viewed from a cross direction (second direction W) perpendicular to the extension direction is a polygonal cylindrical shape. The first surface T1 and the second surface T2 of the mooring portion T are brought into contact with the seat cushion 91 and the seat back 92 of the vehicle seat 9, respectively, so that the vehicle seat 9 can be securely held by the mooring portion T.

[0096] (4) In particular, the mooring portion T is formed into a triangular tube shape with a triangular cross section as viewed from the intersecting direction (second direction W). When the length of the tether flap 58 in the extension direction is constant, a triangle can have the largest area of ​​one side among polygons, and can ensure a large contact area between the first surface T1 and the second surface T2 of the mooring portion T and the seat cushion 91 and the seat back 92. Furthermore, the triangular tube shape requires fewer folding operations when folding the tether flap 58 to form the mooring portion T, and can shorten and simplify the assembly work of the mooring portion T, improving workability.

[0097] (5) The vehicle seat 9 is configured such that a gap 90 is provided between a rear portion 91a of a seat cushion 91 and a lower end portion 92a of a seat back 92, and the lower portion of the seat back 91 has a curved portion 92b that is convex toward the seat cushion 91. The height from the base (first surface T1) of the triangle of the mooring portion T to the apex Tp is designed to be greater than the height from the surface of the seat cushion 91 to the upper end 92c of the curved portion 92b. This allows the second surface T2 of the mooring portion T to be securely abutted against the seat back 92, and prevents the mooring portion T from slipping out of the gap 90 even if the mooring portion T is pulled rearward, for example.

[0098] (6) The tether flap 58 has a base portion 581 on the base end side in the extension direction, and the base portion 581 is configured to extend along the up-down direction of the seat 9 in a state where the mooring portion T is formed. This makes it possible to minimize the distance from the base end of the tether flap 58 to the entrance of the gap portion 90 of the seat 9, i.e., the length of the base portion 581 of the tether flap 58 in the extension direction. In a state where the mooring portion T is formed, no deflection occurs on the base end side of the tether flap 58, and the vehicle seat 9 can be reliably fixed to the fixing base 11 by the mooring portion T. In addition, when the packaged vehicle seat 9 is transported, the tether flap 58 can be prevented from loosening or tearing due to vibration during transportation.

[0099] (7) The tether flap 58 has a tip portion 583 at the tip side in the extension direction, and the tip portion 583 is divided into a first portion 58a, a second portion 58b, a third portion 58c, and a fourth portion 58d from the tip side. The first portion 58a is arranged overlapping the fourth portion 58d, and the first portion 58a and the fourth portion 58d are configured to form the base of a triangle corresponding to the first surface T1 of the mooring portion T. This makes it possible to easily form a triangular cylindrical shape and prevent the mooring portion T from slipping out of the gap portion 90.

[0100] (8) The seat back 92 has a first bulge 92d and a second bulge 92e provided on both sides of the seat 9 in the width direction W and bulging forward (F) of the seat 9, and a flat portion 92f provided between the first bulge 92d and the second bulge 92e. The second surface T2 of the mooring portion T is configured to face the flat portion 92f between the first bulge 92d and the second bulge 92e. Since the second surface T2 of the mooring portion T is configured to abut against the flat portion 92f, for example, when the mooring portion T is pulled backward, the load acting on the mooring portion T can be dispersed by the second surface T2 having a large area, and the mooring portion T can be prevented from slipping out of the gap portion 90.

[0101] (9) The support frame includes first and second vertical members 12, 13 extending along a first direction FR on the placement surface and spaced apart from each other in a second direction W perpendicular to the first direction FR, and first and second horizontal members 14, 15 extending along the second direction W on the placement surface and spaced apart from each other in the first direction FR. The first direction FR corresponds to the front-rear direction of the seat 9, and the second direction W corresponds to the width direction of the seat 9. The support frame is formed in a lattice shape by combining the first vertical member 12, the second vertical member 13, the first horizontal member 14, and the second horizontal member 15. The tether flap 58 extends from the second horizontal member 15 arranged corresponding to the rear end of the seat 9.

[0102] In this way, the first and second vertical members 12, 13 and the first and second horizontal members 14, 15 are made of cardboard material, and the support frame of the fixing base 11 can be constructed by combining them with each other, so that the material cost and manufacturing cost can be significantly reduced compared to conventional steel fixing materials. In addition, the weight is significantly reduced compared to steel fixing materials, and the transportation cost, especially the transportation cost during sea transportation, is significantly reduced. It is also expected to be effective in that it can be recycled as a paper resource after being used as a one-way (disposable) packaging material. Furthermore, the cardboard fixing base 11 is lightweight yet has sufficient strength and durability for practical use, and has moderate cushioning properties compared to steel fixing materials, so that external forces and vibrations acting on the sheet through the fixing materials during transportation are mitigated. Since the tether flap 58 is formed integrally with the second horizontal member 15, the structure of the fixing base 11 itself can easily hold the sheet 9.

[0103] -Variations- (1) The configuration of the fixing base 11 is not limited to the embodiment described above. As long as the fixing base 11 is configured so that the vehicle seat 9 is supported from below on the placement surface by a support frame, which is the basic structure of the fixing base 11, and the tether flap 58 extends from the support frame, various configurations can be adopted for the fixing base 11. For example, in the embodiment described above, one second horizontal member 15 is configured to have two tether flaps 58. However, this is not limited to this, and one second horizontal member 15 may be configured to have one tether flap 58.

[0104] In this case, for example, the fixing base can be configured to have a lattice-shaped basic structure (support frame) in which two (one set) vertical members extending in a first direction FR and arranged in parallel on the loading surface of the pallet 8 and four (two sets) horizontal members extending in a second direction W perpendicular to the first direction FR and arranged in parallel on the loading surface are combined with each other at their intersections. Such a fixing base is configured to be able to fix two vehicle seats 9 arranged side by side in the front-rear direction FR. In this case, one tether flap 58 extends continuously from the horizontal member arranged corresponding to the rear end of the seat 9. The length of the tether flap 58 along the second direction W can be made approximately constant. The method of forming the mooring part T by the tether flap 58 and the method of fixing the vehicle seat 9 by the mooring part T are the same as those in the above-mentioned embodiment.

[0105] (2) In the above-described embodiment, the vehicle seat 9 in which the seat back 92 has the first and second bulging portions 92d, 92e and the flat portion 92f has been described as an example. However, the present invention is not limited to this, and the vehicle seat 9 in which the seat back 92 does not have the first and second bulging portions 92d, 92e can also be fixed to the fixing base 11 by the above-described anchoring portion T. The above-described anchoring portion T can also be applied to a vehicle seat 9 in which the seat cushion 91 has bulging portions on both sides in the width direction W. In this case, it is preferable that the first surface T1 of the anchoring portion T faces the flat portion between the two bulging portions of the seat cushion 91, and both ends of the first surface T1 of the anchoring portion T in the second direction W are disposed so as to substantially coincide with both ends of the flat portion in the second direction W.

[0106] (3) In the above-described embodiment, an embodiment in which the shape maintenance mechanism for maintaining the triangular cylindrical shape of the mooring portion T has a first mechanism and a second mechanism has been described as an example. However, this is not limited to this, and either the first mechanism or the second mechanism may be provided as the shape maintenance mechanism.

[0107] (4) The shape of the tether flap 58 is not limited to the above-mentioned shape. For example, when the second mechanism is omitted as a shape maintaining mechanism, the protrusion 586 protruding from the tip of the first portion 58a and the notch 587 formed at the boundary between the third portion 58c and the fourth portion 58d can be omitted. In addition, at least one of the notches 588 may be omitted.

[0108] (5) In the above-described embodiment, the mooring portion T is formed as a triangular tubular sleeve. However, this is not limited thereto, and the cross section of the mooring portion T when viewed from the second direction W may be a shape other than a triangle, for example, a polygon such as a rectangle, or a circle. However, when the length of the tether flap 58 in the extension direction is constant, the length of one side can be increased by making the cross section triangular. This makes it possible to secure a large area for one side of the tubular shape, to increase the contact area with the seat back 92, and to reduce the number of bending steps required to form the mooring portion T.

[0109] (6) The method of forming the mooring portion T is not limited to the above-described embodiment. For example, the tip portion 583 of the tether flap 58 may be mountain-folded instead of valley-folded at the fold line (crease) to form a triangular tubular sleeve. In this case, the first portion 58a and the fourth portion 58d are overlapped to form the second surface T2 facing the seat back 92, the second portion 58b forms the first surface T1 facing the seat cushion 91, and the third portion 58c forms the third surface T3. However, from the viewpoint of work efficiency when forming the mooring portion T and the difficulty of removing the mooring portion T, it is preferable to form the mooring portion T by valley folding as in the above-described embodiment.

[0110] Although the embodiment and modifications of the present invention have been described above, the present invention is not limited to the above-mentioned embodiment and modifications, and various modifications and changes are possible within the scope of the present invention. [Explanation of symbols]

[0111] 9 Vehicle seats 11 Fixing base 12,13 First and second vertical members 14,15 First and second cross members 90 Gap 91 Seat Cushion 92 Seat back 92a lower end, 92b curved part, 92c upper end, 92d, 92e first and second bulges, 92f flat part 58 Tether flap 581 Base 583 Tip, 58a 1st part, 58b 2nd part, 58c 3rd part, 58d 4th part T Mooring section T1 1st face, T2 2nd face, T3 3rd face, Tp vertex

Claims

1. A packaging structure for a vehicle seat including a fixing base for fixing a vehicle seat on a loading surface of a transport member, The fixing base is made of corrugated cardboard. The fixing base is a support frame disposed on the loading surface and supporting the sheet from below; a tether flap extending from the support frame; Including, The packaging structure for a vehicle seat, wherein the tether flap is configured to be inserted from the rear side of the seat into a gap between a seat cushion and a seat back of the seat to form a mooring portion for mooring a rear portion of the seat.

2. 2. The packaging structure for a vehicle seat according to claim 1, wherein the mooring portion is formed by bending the tether flap inserted through the gap from a tip end side to a base end side in an extension direction of the tether flap, and the mooring portion is designed so that an outer dimension of the mooring portion is larger than a gap dimension of the gap.

3. 3. The packaging structure for a vehicle seat according to claim 2, wherein the mooring portion has at least a first surface designed to face the seat cushion and a second surface designed to face the seat back, and is formed by the tether flap folded so that its cross section viewed from a cross direction perpendicular to the extension direction is a polygonal cylindrical shape.

4. The packaging structure for a vehicle seat according to claim 3 , wherein the mooring portion is formed in a triangular tubular shape having a triangular cross section as viewed from the intersecting direction.

5. The seat is configured such that the gap is provided between a rear portion of the seat cushion and a lower end portion of the seat back, and a lower portion of the seat back has a curved portion that is convex toward the seat cushion, 5. The packaging structure for a vehicle seat according to claim 4, wherein a height from a base to a vertex of the triangle is designed to be greater than a height from a surface of the seat cushion to an upper end of the curved portion.

6. 6. The packaging structure for a vehicle seat according to claim 5, wherein the tether flap has a base portion at the base end side in the extension direction, and the base portion is configured to extend along the up-down direction of the seat when the mooring portion is formed.

7. The tether flap has a tip portion on the tip side in the extension direction, and the tip portion is divided into a first portion, a second portion, a third portion, and a fourth portion from the tip side, 7. The packaging structure for a vehicle seat according to claim 6, wherein the first portion is disposed on top of the fourth portion, and the first portion and the fourth portion are configured to define a base of the triangle corresponding to the first surface.

8. the seat back has a first bulge portion and a second bulge portion provided on both sides in a width direction of the seat and bulging forward of the seat, and a flat portion provided between the first bulge portion and the second bulge portion, The packaging structure for a vehicle seat according to claim 3 , wherein the second surface of the mooring portion is configured to face the flat portion between the first bulging portion and the second bulging portion.

9. The support frame includes: a first vertical member and a second vertical member extending along a first direction on the placement surface and spaced apart from each other in a second direction perpendicular to the first direction; a first horizontal member and a second horizontal member extending along the second direction on the placement surface and spaced apart from each other in the first direction; having The first direction corresponds to a front-rear direction of the seat, and the second direction corresponds to a width direction of the seat, The support frame is formed in a lattice shape by combining the first vertical member, the second vertical member, the first horizontal member, and the second horizontal member, The packaging structure for a vehicle seat according to claim 1 , wherein the tether flap extends from the second horizontal member disposed in correspondence with a rear end portion of the seat.

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