阅读说明：本技术 座椅结构 (Chair structure ) 是由 小原健史 宫泽好之 小西克幸 竹野翔太 于 2018-06-27 设计创作，主要内容包括：本发明能够提供可将罩可靠地固定于座椅并能够灵活地调整罩的张紧度的结构。座椅结构具有构成座部的缓冲部件(20)、位于缓冲部件(20)的下表面的底板(21)和覆盖缓冲部件(20)的罩部件(22)，其中，罩部件(22)的端缘具备挂于底板(21)的紧固片(46)，在紧固片(46)与底板(21)的内侧具备将它们各自卡合的罩卡合结构(100)。(The invention can provide a structure which can reliably fix a cover on a seat and can flexibly adjust the tension degree of the cover. The seat structure comprises a buffer component (20) forming a seat part, a bottom plate (21) positioned on the lower surface of the buffer component (20), and a cover component (22) covering the buffer component (20), wherein the end edge of the cover component (22) is provided with a fastening piece (46) hung on the bottom plate (21), and the inner sides of the fastening piece (46) and the bottom plate (21) are provided with cover clamping structures (100) for clamping the fastening piece (46) and the bottom plate (21).)

1. A seat structure having a cushion member (20) constituting a seat portion, a bottom plate (21, 221) positioned on a lower surface of the cushion member (20), and a cover member (22, 222, 322, 422) covering the cushion member (20),

the cover member (22, 222, 322, 422) has a fastening piece (46, 246, 370, 446) at an end edge thereof, which is hung on the base plate (21, 221), and cover engagement structures (100, 200, 300, 400) for engaging the fastening piece (46, 246, 370, 446) with the base plate (21, 221) are provided on the inner side of the base plate.

2. The seat structure according to claim 1,

the cover engagement structure (100, 200, 300, 400) is a hook and loop fastener (72, 272, 372, 472).

3. The seat structure according to claim 2,

the bottom plate (21, 221) is provided with a vertical wall (21c, 221c) directed downward at the end in the width direction, and the cover engagement structure (100, 200, 300, 400) is located inside the vertical wall (21c, 221 c).

4. The seat structure according to claim 2,

an anti-rollover mechanism (101, 301) is provided to the fastening tab (46, 370).

5. The seat structure according to claim 4,

the anti-curling mechanism (101, 301) is formed separately from the hook and loop fastener (72, 372), and is located closer to the end (47, 374) of the fastening piece (46, 370) than the hook and loop fastener (72, 372).

6. The seat structure according to claim 4 or 5,

the anti-rollover mechanism (101, 301) has a hook (27a) provided on the bottom plate (21) and an opening (46b, 346b) provided on the fastening tab (46, 370).

7. The seat structure according to claim 6,

a plurality of the openings (46b, 346b) are provided in the fastening tab (46, 370).

8. The seat structure according to any one of claims 2 to 7,

the hook and loop fastener (272, 472) provided on the bottom plate (221) is formed in a projection shape (272a, 472a) provided so as to be inclined in a direction facing the stretching direction of the cover member (222, 422).

Technical Field

The present invention relates to a seat structure.

Background

Patent document 1 describes a structure in which a mounting portion having an extensible member is formed at an end portion of a mesh-structured cover, the mounting portion is disposed inside a vertical wall of a seat pan, and the cover is mounted to a seat by extending and contracting the extensible member. Patent document 1 describes a configuration in which a belt member is provided at an end portion of a cover, a hook and loop fastener is provided at an end portion of the belt member, and a pair of belt portions are engaged with each other.

Disclosure of Invention

Problems to be solved by the invention

In the prior art, a structure is disclosed in which an attachment portion provided at an end edge of a cover is positioned inside a vertical wall of a seat pan, the cover is attached at an invisible position, and at least a pair of belt members provided at the end edge of the cover are engaged with each other by a hook and loop fastener, thereby securing the attachment. However, since there is no mechanism for fixing the cover to the seat and there is no flexible structure for expressing the feeling of comfort of the cover, it is impossible to realize attachment that satisfies the preference of the user.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a seat structure capable of reliably fixing a cover to a seat and flexibly adjusting the tension of the cover.

Means for solving the problems

All the contents of Japanese patent application laid-open No. 2017-129777, filed on 30.6.2017, are included in the present specification.

The seat structure is characterized in that the end edge of the cover member (22, 222, 322, 422) is provided with a fastening piece (46, 246, 370, 446) hung on the bottom plate (21, 221), and a cover engaging structure (100, 200, 300, 400) for engaging the fastening piece (46, 246, 370, 446) and the bottom plate (21, 221) is provided on the inner side of the fastening piece (46, 246, 370, 446) and the bottom plate (21, 221).

In the above invention, the cover engagement structure (100, 200, 300, 400) may be a hook and loop fastener (72, 272, 372, 472).

In the above invention, the following may be adopted: the bottom plate (21, 221) is provided with a vertical wall (21c, 221c) directed downward at the end in the width direction, and the cover engagement structure (100, 200, 300, 400) is located inside the vertical wall (21c, 221 c).

In the above invention, the following may be adopted: an anti-rollover mechanism (101, 301) is provided to the fastening tab (46, 370).

In the above invention, the following may be adopted: the anti-curling mechanism (101, 301) is formed separately from the hook and loop fastener (72, 372), and is located closer to the end (47, 374) of the fastening piece (46, 370) than the hook and loop fastener (72, 372).

In the above invention, the following may be adopted: the anti-rollover mechanism (101, 301) has a hook (27a) provided on the bottom plate (21) and an opening (46b, 346b) provided on the fastening tab (46, 370).

In the above invention, the following may be adopted: a plurality of the openings (46b, 346b) are provided in the fastening tab (46, 370).

In the above invention, the following may be adopted: the hook and loop fastener (272, 472) provided on the bottom plate (221) is formed in a projection shape (272a, 472a) provided obliquely in a direction facing the stretching direction of the cover member (222, 422)

Effects of the invention

According to the seat structure of the present invention, the seat structure includes a cushion member constituting the seat portion, a bottom plate positioned on a lower surface of the cushion member, and a cover member covering the cushion member, wherein an end edge of the cover member includes a fastening piece hung on the bottom plate, and cover engagement structures for engaging the fastening piece with the bottom plate are provided on inner sides of the fastening piece and the bottom plate. According to this configuration, the cover member can be fixed to the seat with a simple configuration, and the feeling of fit of the cover member can be expressed.

In the above invention, the cover engagement structure may be a hook and loop fastener. According to this configuration, the cover member can be flexibly attached to the base plate, the tension of the cover member can be adjusted, and the cover member can be easily attached.

In the above invention, the bottom plate has a vertical wall directed downward at a widthwise end thereof, and the cover engagement structure is located inside the vertical wall. The cover can be easily folded back and stretched, and the clamping and the tension degree can be adjusted. Further, since the engaging structure is simple, the user can easily set a desired tension.

In the above invention, the fastening tab may be provided with an anti-rollover mechanism. According to this configuration, the movement of the hook and loop fastener can be restricted so as not to easily come off, and the cover member can be reliably engaged with the seat.

In the above invention, the following may be adopted: the anti-curling mechanism is formed separately from the hook and loop fastener, and is located closer to the end portion side of the fastening piece than the hook and loop fastener. According to this configuration, the movement of the fastening tab can be reliably restricted by pressing the remaining portion of the fastening tab, thereby avoiding the hook and loop fastener from being affected.

In the above invention, the anti-rolling mechanism may have a hook provided on the bottom plate and an opening provided on the fastening tab. With this configuration, the cover member can be prevented from being turned over with a simple shape.

In the above invention, the fastening tab may be provided with a plurality of the openings. According to this configuration, the fastener piece can be flexibly engaged with the base plate according to the length of the remaining portion.

In the above invention, the following may be adopted: the hook and loop fastener provided on the base plate has a projection shape provided so as to be inclined in a direction facing the stretching direction of the cover member. According to this configuration, since the distal end of the projection is in the direction of entering the fastener tab with respect to the pulling direction, the fastener tab can be prevented from coming off.

Drawings

Fig. 1 is a perspective view of a peripheral portion of a seat of a motorcycle according to a first embodiment of the present invention.

Fig. 2 is a right side view of the peripheral portion of the seat.

Fig. 3 is a plan view of a peripheral portion of the seat as viewed from above.

Fig. 4 is a plan view of the seat as viewed from below.

Fig. 5 is a V-V sectional view of fig. 2.

Fig. 6 is a diagram schematically showing the structure of the vertical wall and the folded portion, fig. 6 (a) is a diagram corresponding to the main portion of fig. 5, and fig. 6 (B) is a diagram viewed in the direction of arrow VIA in fig. 6 (a).

Fig. 7 is an enlarged cross-sectional view schematically showing the structure of the mesh portion and the cushion body in fig. 5.

Fig. 8 is an explanatory view of a case where the folded portion is attached to the seat pan, fig. 8 (a) is an explanatory view of the present embodiment, and fig. 8 (B) is an explanatory view of a modification.

Fig. 9 is a diagram showing an example of a processing step of the hook hole.

Fig. 10 is an X-X sectional view of fig. 4.

Fig. 11 is a main part sectional view of the seat of the second embodiment.

Fig. 12 is a sectional view of a seat of the third embodiment.

Fig. 13 is a main part sectional view of a seat of the fourth embodiment.

Detailed Description

Embodiments of the present invention will be described below with reference to the drawings.

In the description, unless otherwise specified, the directions such as front, rear, left, right, and up and down are the same as the directions of the vehicle body. In the drawings, reference symbol FR denotes the front of the vehicle body, UP denotes the upper of the vehicle body, and RH denotes the right of the vehicle body.

[ first embodiment ]

Fig. 1 is a perspective view of a peripheral portion of a seat 10 of a motorcycle 1 according to a first embodiment of the present invention. Fig. 2 is a right side view of the peripheral portion of the seat 10.

The motorcycle 1 includes front wheels (not shown), rear wheels (not shown), a vehicle body frame 11 (fig. 2), and a power unit (not shown) that generates power for driving the rear wheels as drive wheels.

The motorcycle 1 includes a pot member 12 at a rear and upper side of the front wheel. The tank member 12 is supported by the vehicle body frame 11. Here, the tank-shaped member 12 is a fuel tank, but may be a tank-shaped cover that covers an air cleaner, a storage box, and the like.

The motorcycle 1 is a saddle-ride type vehicle, and includes a seat 10 (a straddle-type seat) on which a seat occupant sits so as to straddle between a rear cover 13 and a tank member 12, and the rear cover 13 is supported by a rear portion of a vehicle body frame 11.

The seat 10 is supported on a vehicle body frame 11. The seat 10 is detachably mounted on the vehicle body frame 11 side by a seat lock mechanism (not shown). A key cylinder operating portion 14 for operating the seat lock mechanism is provided at the front of the rear cover 13.

Fig. 3 is a plan view of the peripheral portion of the seat 10 as viewed from above.

Referring to fig. 1 to 3, the seat 10 is a driver's single seat. The seat 10 is disposed with its front edge along the rear edge of the can member 12 and its rear edge along the front surface of the rear cover 13. The seat 10 is formed such that the width in the vehicle width direction (left-right direction) decreases from the rear portion toward the front side, and the left and right side edge portions 10a, 10a are inclined so as to be positioned inward in the vehicle width direction toward the front side in plan view.

As shown in fig. 2, the driver R sits on the upper surface of the seat 10, and extends the left and right legs L downward along the left and right side surfaces of the seat 10.

Since the width is narrower as the seat 10 goes forward, the degree of freedom of movement of the legs L of the driver R sitting on the seat 10 can be secured. Further, since the seat 10 has a wider width as it goes rearward, a wide seat area that can cope with a change in the posture of the driver R and the like can be secured. In the case of a double seat that is not a single seat, the seat width may be narrower as it goes forward.

Fig. 4 is a plan view of the seat 10 as viewed from below. Fig. 5 is a V-V sectional view of fig. 2.

The seat 10 includes: a cushion body (cushion member) 20 constituting a seat portion; a seat pan 21 located on a lower surface of the cushion body 20; and a seat cover (cover member) 22 covering the cushion body 20.

The seat pan 21 is a plate-shaped frame member that functions as a framework of the seat 10, and is formed of a material having high rigidity, such as a hard synthetic resin. The seat pan 21 is formed in an outer shape substantially the same as that of the seat 10 as viewed in plan.

The left and right side edge portions 21a, 21a of the seat pan 21 are inclined along the side edge portions 10a, 10a of the seat 10 such that the width of the seat pan 21 decreases toward the front side in plan view. In the side view of fig. 2, the side edge portions 21a, 21a of the seat pan 21 extend rearward so as to lower rearward from the front end to the rear end thereof, and the rear end portion thereof extends rearward so as to raise rearward.

Referring to fig. 3 and 4, the front end portion of the seat pan 21 is formed in a curved shape that is recessed rearward along the rear surface of the tank member 12. Specifically, front protruding portions 21b, 21b protruding forward are formed on the left and right side portions of the front end portion of the seat pan 21. The front protrusions 21b, 21b extend forward so as to extend along the left and right side surfaces of the rear end portion of the tank member 12.

Fig. 5 is a V-V sectional view of fig. 2. Fig. 6 is a diagram schematically showing the structure of the vertical wall and the folded portion, fig. 6 (a) is a diagram corresponding to the main portion of fig. 5, and fig. 6 (B) is a diagram viewed in the direction of arrow VIA in fig. 6 (a).

As shown in fig. 5, the seat pan 21 integrally includes an upper surface portion 26 extending substantially horizontally in the width direction (left-right direction), and left and right inclined portions 27, 27 extending outward and downward in the vehicle width direction from left and right side edges of the upper surface portion 26. The upper surface portion 26 and the inclined portions 27, 27 are formed over substantially the entire range of the seat pan 21 in the front-rear direction. The side edge portions 21a, 21a of the seat pan 21 are outer edge portions of the inclined portions 27, 27. The lower surfaces of the side edges 21a, 21a bulge downward. That is, the inclined portion 27 and the side edge portion 21a are formed at the end portions in the width direction of the seat pan 21 in the present embodiment, and the inclined portion 27 and the side edge portion 21a are bent downward with respect to the upper surface portion 26 of the seat pan 21 and constitute vertical walls 21c, 21c directed downward. In the first embodiment, the inclined portions 27, 27 and the side edge portions 21a, 21a constitute the vertical walls 21c, but as shown in fig. 6, the vertical walls 21c, 21c may have a wall shape that is bent downward with respect to the upper surface portion 26 and extends in the vertical direction (longitudinal direction) so as to be directed downward.

Referring to fig. 2 and 4, provided on the lower surface of the seat pan 21 are: leg portions 28 … provided at the front and rear of the lower surface of the seat pan 21; stay portions 29, 29 extending downward from the front portion of the lower surface of the seat pan 21; and locking portions 30, 30 extending rearward from a rear portion of the lower surface of the seat pan 21.

The seat 10 is supported on the vehicle body frame 11 side by the leg portion 28 …. The seat 10 is fixed to the vehicle body frame 11 side by the locking portions 30 and 30, and is fixed to the vehicle body frame 11 by a fixing member such as a bolt that engages with the stay portions 29 and 29.

Referring to fig. 1 to 5, the seat cover 22 includes: a mesh portion 40 formed of a mesh material; and a skin portion 41 formed of a material different from the mesh portion 40.

The seat cover 22 further includes: front side pockets 42, 42 covered on the front protrusions 21b, 21b (fig. 4) of the seat pan 21; and a rear side pocket 43 that is covered at the rear end of the seat pan 21.

The front bag portions 42, 42 are formed in bag shapes so as to cover the front protruding portions 21b, 21b from the upper, lower, left, right, and front sides, and are hooked on the front protruding portions 21b, 21b from the front side.

The rear side pocket portion 43 is formed in a bag shape so as to cover the entire rear end of the seat pan 21 from the upper, lower, left, right, and rear, and is hooked on the rear end of the seat pan 21 from the rear.

The front side pockets 42, 42 and the rear side pocket 43 are constituted by the skin 41. As shown in fig. 3, the portions of the seat cover 22 between the front side pockets 42 and the rear side pocket 43 are configured by the mesh portion 40. That is, a space between the front end portion and the rear end portion of the seat cover 22 is formed by the mesh portion 40, and most of the seating surface of the driver is formed by the mesh material.

The skin portion 41 may be made of a material having higher strength and rigidity than the mesh portion 40. The skin portion 41 may be made of a material having lower air permeability and higher water resistance than the mesh portion 40. The skin portion 41 is formed of a sheet-like material made of synthetic resin such as PVC (polyvinyl chloride) leather, for example.

The skin portion 41 may be provided to cover the surface of the material of the mesh portion 40, or may be provided to the outer edge of the material of the mesh portion 40 by sewing.

Fig. 7 is an enlarged cross-sectional view schematically showing the structure of the mesh portion 40 and the cushion body 20 in fig. 5.

As shown in fig. 7, the mesh portion 40 of the seat cover 22 includes a surface layer 40a, a back layer 40b, and a connecting layer 40c connecting the surface layer 40a and the back layer 40b, and is formed of a three-dimensional knitted fabric having a three-layer structure, in which each of the layers 40a to 40c is formed of a knitted fabric formed by knitting a fiber material made of synthetic resin or the like. The surface layer 40a and the back layer 40b are formed of a knitted fabric having a mesh-like hollow structure, and have air permeability. In addition, it is preferable that the top sheet 40a is made of a fibrous material (for example, bulked yarn) having a good surface texture and a low water retentivity.

The surface layer 40a and the back layer 40b are connected by monofilament connecting yarns 40d to constitute a connecting layer 40 c. More specifically, the connecting layer 40c is formed of a knitted fabric having a cross structure in which at least two connecting yarns 40d cross when the top layer 40a and the back layer 40b are connected. By forming the cross structure, the air permeability, the form stability, the elasticity (impact absorption), the durability (durability of elasticity), and the like of the seat cover 22 as the three-dimensional woven fabric can be easily achieved at the same time. Further, since the gap is formed in the entire mesh portion 40, it is also advantageous to reduce the weight of the seat cover 22.

The connecting layer 40c is not limited to the cross structure, and may be a column structure connecting the front layer 40a and the back layer 40b substantially perpendicularly, or a truss structure in which at least two connecting yarns 40d and the front and back knitted fabrics form a triangle.

The mesh portion 40 may have a multilayer structure other than three layers. Alternatively, the surface layer 40a or the back layer 40b may be replaced with a single mesh fabric or the like, and a part or all of each of the layers 40a to 40c may be formed of a material other than a knitted fabric. Further, a known mesh material may be used without being limited to the multilayer structure.

As shown in fig. 4 and 5, the seat cover 22 includes a flap (flap) -shaped folded portion (fastening piece) 46 … that is hung on the seat pan 21 at the end edge in the left-right direction. The folded portion 46 … is formed by extending the mesh portion 40 so as to wrap around the lower surface of the seat pan 21. That is, the folded portion 46 … is made of a mesh material. The plurality of folded portions 46 … are provided on the left and right. The folded-back portion 46 … is provided between the front bag portions 42, 42 and the rear bag portion 43 in the front-rear direction.

The folded-back portion 46 … is folded back toward the inside of the seat 10 at a bent portion 46a …, and the bent portion 46a … covers the tip ends (side edge portions 21a) of the vertical walls 21c, 21c directed downward from the seat bottom panel 21 from below. Therefore, the seat cover 22 can be easily folded back and stretched at the ends of the vertical walls 21c, and the engagement and the tension can be easily adjusted by the vertical walls 21c, 21 c.

Fig. 8 is an explanatory view of a case where the folded portion 46 is attached to the seat pan 21, fig. 8 (a) is an explanatory view of the present embodiment, and fig. 8 (B) is an explanatory view of a modification.

As shown in fig. 8 a, the surface fastener 72 is provided on the lower surfaces (inner surfaces of the vertical walls 21c, 21c) of the inclined portions 27, 27 on the inner side in the width direction than the side edge portions 21a, 21 a. The hook and loop fastener 72 is a hook surface on which a plurality of hooks 72a are formed and densely raised in a hook shape. That is, the hook and loop fastener is generally configured such that a hook surface formed by densely raising hooks and a loop surface formed by densely raising loops are paired, but in the first embodiment, only one hook surface is used.

The inclined portions 27 and 27 are provided with anti-curl hooks 27a (hooks) corresponding to the positions on the inner side in the left-right direction with respect to the fastener tape 72, that is, the side of the distal end portion 47 (end portion) of the folded-back portion 46 …. The anti-rollover hooks 27a (hooks) are formed in a rod shape that protrudes downward from the lower surfaces of the inclined portions 27, 27 of the seat pan 21 and the ends of which are bent inward in the left-right direction. The anti-rollover hook 27a of the present embodiment is a separate structure from the seat pan 21, but may be integrally formed with the seat pan 21.

When the folded-back portion 46 … is folded back and pressed against the hook and loop fastener 72, the hook 72a of the hook and loop fastener 72 is hooked on the mesh portion of the folded-back portion 46 …. The folded-back portion 46 and the hook and loop fastener 72 constitute the cover engagement structure 100 of the first embodiment. Folded portion 46 … is coupled to inclined portions 27, 27. Therefore, the seat cover 22 can be fixed to the seat 10 with a simple configuration, and since the seat cover 22 and the seat pan 21 can be flexibly attached by being engaged with each other via the hook and loop fastener 72, the tightness of the seat cover 22 can be adjusted, and the seat cover can be easily attached. Further, the appropriate feeling of the seat cover 22 can be exhibited.

Here, a hook hole 46b (opening) that engages with the anti-rollover hook 27a is formed in the tip end portion 47 of the folded-back portion 46 …. Three hooking holes 46b are formed at intervals in the width direction (left-right direction). The anti-rollover hook 27a passes through one hook hole 46b of the three hook holes 46b, 46 b. Since the plurality of hook holes 46b are provided, the hook hole 46b to which the rollover prevention hook 27a is hooked can be changed according to the tension condition (appropriate condition) of the seat cover 22. That is, the three hook holes 46b, and 46b and the anti-rollover hook 27a can be flexibly locked to the seat pan 21 according to the length of the remaining portion of the folded-back portion 46 …, and the tension state (suitable state) of the seat cover 22 can be adjusted. The anti-rollover mechanism 101 is constituted by the hook holes 46b, 46b and the anti-rollover hook 27 a. The seat cover 22 can be prevented from being rolled up by the anti-rolling mechanism 101. In the anti-rolling mechanism 101, the hooking holes 46b, and 46b may be three or more, and are not limited to three.

In general, if the coupling is by means of the hook and loop fastener, the hook and loop fastener is less likely to fall off when a force perpendicular to the entire hook and loop fastener is applied, but if the folded-back portion 46 is folded back and a force along the surface direction is applied to the hook and loop fastener 72, the coupling between the hook and loop fastener 72 and the folded-back portion 46 is easily released and falls off.

When an operator R (passenger) sits on the seat 10, the upper surface of the seat 10 is pressed downward by the weight of the operator R, and therefore the seat cover 22 covering the seat 10 is also pressed downward, and a tensile force acts on the seat cover 22 along the surface. Therefore, the side portion of the seat cover 22 and the folded portion 46 inside the side edge portion 21a are stretched in the direction along the surface of the side portion of the seat cover 22 and the folded portion 46. At this time, since a tensile force acts in a direction along the surface of the hook and loop fastener 72 in the folded-back portion 46, the folded-back portion 46 may come off from the hook and loop fastener 72 in the case of elapsed time or other disturbance.

In contrast, in the present embodiment, the anti-curling mechanism 101 is provided, and the folded portion 46 … engages with the anti-curling hook 27 a. Therefore, even if a tensile force acts on the folded-back portion 46 due to the weight of the driver R, the tensile force is cancelled by the anti-rolling-up mechanism 101 in the vicinity of the hook and loop fastener 72, and the movement of the folded-back portion 46 in the rolling-up direction is restricted. Therefore, the folded-back portion 46 is less likely to be folded back, and the coupling between the folded-back portion 46 and the hook and loop fastener 72 is easily maintained.

In the present embodiment, the configuration in which the hook 72a is provided to the hook 72a of the hook 72 is explained, but the hook may be configured by a mushroom-shaped hook portion 72B whose tip is bulged as shown in fig. 8 (B), for example.

Referring to fig. 6 schematically showing folded-back portion 46 and vertical wall 21c of fig. 5, folded-back portion 46 is folded back in the inward direction at the end (side edge portion 21a) of vertical wall 21 c. This makes it possible to easily fold and stretch the seat cover 22 at the distal end (the side edge 21a) of the vertical wall 21c, and to easily adjust the engagement and the tension. The folded-back portion 46 is pressed against the hook and loop fastener 72 provided on the inner side of the vertical wall 21c, and a hook 72a (fig. 7) of the hook and loop fastener 72 is hooked on the mesh portion of the folded-back portion 46. Thus, the seat cover 22 is fixed to the seat 10. The anti-curl hook 27a is provided in the vertical wall 21c on the side of the distal end portion 47 of the folded-back portion 46 with respect to the hook tape 72, and the anti-curl hook 27a is engaged with the hook hole 46b of the folded-back portion 46. This makes the folded portion 46 less likely to fall off the hook and loop fastener 72. Further, since the hook and loop fastener 72 and the anti-rolling mechanism 101 are provided inside the vertical wall 21c, the attachment structure of the seat cover 22 is not easily visible from the outside of the seat 10, and the appearance is good.

Fig. 9 is a diagram showing an example of a processing step of the hooking hole 46 b.

The distal end portion of the folded portion 46 made of the mesh material is subjected to compression processing by the heated jig T to be a heat-hardened plate-like distal end portion 47. Thereafter, the hook hole 46b is formed in the distal end portion 47 by punching processing by press processing or the like. The surplus portion 47a produced by the compression processing is cut and removed.

The folded-back portion 46 may be a separate member provided on the seat cover 22, and in this case, the hook and loop fastener 72 (cover engagement structure 100) and the hole 46b (opening) as the anti-rollover mechanism 101 may be provided on the separate member.

Referring to fig. 3 and 5, the cushion body 20 is disposed in the space S between the seat cover 22 and the seat pan 21. The buffer 20 is divided into three parts, i.e., a first buffer 20a, a second buffer 20b, and a third buffer 20 c.

The first cushion body 20a is supported by the upper surface portion 26 of the seat pan 21. The second cushion body 20b and the third cushion body 20c are disposed on the left and right of the first cushion body 20a, and are supported by the inclined portions 27, 27 of the seat pan 21, respectively.

The first, second, and third cushion bodies 20a, 20b, and 20c are provided substantially over the entire front and rear sides of the seat pan 21.

As shown in fig. 7, the cushion body 20 is a three-dimensional net-like structure formed by twisting fibers 45 (also referred to as a continuous thread-like body) made of a synthetic resin such as a thermoplastic elastomer to form loops, and joining the contact portions of the loops by welding or the like. Each member of the cushion body 20 is cut from a large material having a fixed size and a desired size, and formed into a desired shape.

That is, the cushion body 20 is formed of a thermoplastic elastic mesh body. Thus, a cushion having excellent cushioning properties, durability and air permeability can be obtained. In particular, a cushion having an extremely excellent air permeability can be obtained as compared with a conventional cushion for a vehicle made of polyurethane.

Further, by adjusting the material, fiber diameter, hollow ratio (hollow area per unit area) and the like of the fibers 45, the cushioning property, air permeability, durability (durability of the cushioning property) and the like can be adjusted to desired performances. In this way, even with a relatively thin seat 10, sufficient cushioning properties and air permeability can be obtained, and heat dissipation properties and water drainage properties (water permeability) can also be obtained. Since the entire cushion body 20 is formed with a gap, it is also advantageous to reduce the weight of the seat 10.

The cushion body 20 is not limited to the thermoplastic elastic mesh body. The key point is that the desired cushioning properties, air permeability, and the like can be obtained by applying the three-dimensional network structure to the cushion body 20.

As shown in fig. 5, the bag 23 includes: a first bag 23a for accommodating the first cushion body 20 a; a second bag body 23b that houses the second cushion body 20 b; and a third bag 23c for accommodating the third cushion body 20 c. The bag 23 is made of a material having high air permeability, for example, a sheet made of a mesh material.

The first bag member 23a is formed in a bag shape by the sheet member 50 sewn to the back surface of the mesh portion 40 and the mesh portion 40.

Specifically, the sheet member 50 includes: a first sheet member 50a joined to the mesh portion 40 at a skin joint portion 51 (see fig. 3 and 5), the skin joint portion 51 extending in the front-rear direction along a first side edge of the first cushion body 20 a; and a second-side sheet member 50b joined to the mesh portion 40 at a skin joint portion 52 (see fig. 3 and 5), the skin joint portion 52 extending in the front-rear direction along the second-side edge of the first cushion body 20 a.

The sheet member 50 includes a joint portion 50c, and the joint portion 50c is formed by overlapping inner edge portions of the one sheet member 50a and the other sheet member 50 b. The coupling portion 50c is coupled by friction by being sandwiched between the first cushion body 20a and the seat pan 21.

The second bag member 23b is formed in a bag shape by the sheet member 53 joined to the back surface of the mesh portion 40 and the mesh portion 40.

Specifically, the sheet member 53 includes: a sheet member 53a on one side joined by a lower skin joining section 51a on the back side of the bent section 46a of the right folded section 46; and another side sheet member 53b joined to the mesh portion 40 through the epidermis joining portion 51.

The sheet member 53 includes a joint portion 53c, and the joint portion 53c is formed by overlapping inner edge portions of the one sheet member 53a and the other sheet member 53 b.

The coupling portion 53c is coupled by being sandwiched between the second cushion body 20b and the seat pan 21.

The first sheet member 50a and the second sheet member 53b sewn together at the skin joint 51 may be formed of an integral sheet.

The third bag member 23c is configured to be a bag shape by the sheet member 54 joined to the back surface of the mesh portion 40 and the mesh portion 40.

Specifically, the sheet member 54 includes: a side sheet member 54a joined to the mesh portion 40 through the skin joint portion 52; and the other side sheet member 54b joined by the lower skin joining portion 52a on the back side of the bent portion 46a of the left folded portion 46.

The sheet member 54 includes a coupling portion 54c formed by overlapping inner edge portions of the one sheet member 54a and the other sheet member 54 b.

The coupling portion 54c is coupled by being sandwiched between the third cushion body 20c and the seat pan 21.

The other side sheet member 50b and the one side sheet member 54a sewn together at the skin joint portion 52 may be formed of an integral sheet.

The coupling portions 50c, 53c, and 54c may be coupled by coupling means such as a hook and loop fastener.

The first cushion body 20a, the second cushion body 20b, and the third cushion body 20c are each shaped to follow the shape of the space S defined by the seat cover 22 and the seat pan 21 in the state of being housed in the bag body 23. Therefore, even in a state where the cushion body 20 is accommodated in the bag body 23 and disposed in the space S, the cushion body 20 is hardly deformed and has a natural shape in which an external force is not applied.

The bag body 23 covers the cushion body 20 from the upper, lower, left, and right sides. The bag body 23 may cover the cushion body 20 from the upper, lower, left, right, front, and rear.

As shown in fig. 5, the second cushion body 20b and the third cushion body 20c include side cushion portions 20d, 20d at lower ends thereof, and the side cushion portions 20d, 20d are sandwiched between the outer side surfaces of the side edge portions 21a, 21a of the seat pan 21 and the mesh portion 40. By providing the side cushion portions 20d, the side edge portions 21a, 21a are less likely to come into hard contact with the leg L (fig. 2), and the ride feeling is good.

As shown in fig. 3 and 5, a tangent portion 55 extending in the front-rear direction along the skin-joined portion 51 is provided on the mesh portion 40 on the inner side in the width direction of the skin-joined portion 51.

Further, in the mesh portion 40 and on the inner side in the width direction of the skin bonded portion 52, a tangent portion 56 extending in the front-rear direction along the skin bonded portion 52 is provided.

The skin bonding portions 51 and 52 are portions where the mesh portion 40 and the bag body 23 are bonded by welding a string-shaped member made of resin to a portion where the mesh portion 40 and the bag body 23 overlap.

The cut portions 55 and 56 are portions formed by welding a string-like member made of resin to the surface of the mesh portion 40 in a cut line shape.

The skin-joining portions 51, 52 and the cut portions 55, 56 are exposed as irregularities on the surface of the mesh portion 40. This increases the friction between the mesh portion 40 and the seated person, and allows the skin-joining portions 51 and 52 and the tangent portions 55 and 56 to be used as a slip stopper for the seated person.

The skin joining portions 51 and 52 and the cut portions 55 and 56 are not limited to welding, and may be formed by sewing a thread to the mesh portion 40.

In the first embodiment, the seat cover 22 and the cushion body 20 have high air permeability, and therefore the seating feeling of the seat 10 is good.

Since the seat cover 22 and the cushion body 20 have high air permeability, water such as rain may enter the seat cover 22 and the cushion body 20.

Referring to fig. 5, the water W entering the seat 10 from above moves downward along the seat cover 22 and the cushion body 20, moves along the upper surface of the seat pan 21, flows down from the inclined portions 27, and flows toward the bent portions 46a, 46 a.

The water W flows down the seat cover 22 and the cushion body 20 located outside the inclined portions 27, 27 to the bent portions 46a, 46 a.

The side edge portions 10a, 10a of the seat 10 are positioned outward of the outer side surfaces of the side edge portions 21a, 21a of the seat pan 21. Therefore, the water W flowing into the curved portions 46a, 46a falls downward through the mesh-shaped curved portions 46a, 46a and is discharged downward of the seat 10, and therefore the water W is less likely to adhere to the legs L of the driver R sitting on the seat 10.

When the seat 10 is assembled, the seat cover 22 and the cushion body 20 can be attached to the seat pan 21 in a state where the cushion body 20 is housed in the bag body 23 integrally provided in the mesh portion 40, and workability is good. Further, when the seat 10 is detached for maintenance or the like, the seat cover 22 and the cushion body 20 can be integrally detached from the seat pan 21, and workability is good. Further, by releasing the coupling of the coupling portions 50c, 53c, and 54c of the bag body 23, the cushion body 20 can be easily detached, and maintenance and the like of the cushion body 20 are easy.

Further, since the cushion body 20 is accommodated in the bag body 23 provided in the mesh portion 40, the cushion body 20 can be held with a simple structure, and the seat 10 having good air permeability can be easily manufactured because the degree of freedom of the shape is high even if the cushion body 20 is a three-dimensional mesh structure.

The cushion body 20 is manufactured by cutting a material provided in a fixed shape, for example, a rectangular parallelepiped, into a desired shape. Since the cushion body 20 is divided into the first cushion body 20a, the second cushion body 20b, and the third cushion body 20c, the shape of the cushion body 20 can be easily adapted to the predetermined shape of the seat 10.

Further, since the first, second, and third cushion bodies 20a, 20b, and 20c divided into a plurality are respectively accommodated in the first, second, and third bag bodies 23a, 23b, and 23c, the shape of the cushion body 20 can be easily adapted to the arrangement place, and the degree of freedom of the shape of the cushion body 20 is high.

The first, second, and third buffer bodies 20a, 20b, and 20c are disposed adjacent to each other in the space S, thereby restricting positions of each other.

Fig. 10 is an X-X sectional view of fig. 4.

Referring to fig. 4 and 10, the rear side pocket portion 43 of the seat cover 22 includes locking holes 43a and 43a on the lower surface. The locking holes 43a and 43a are inserted with locking portions 30 and 30 extending rearward from the seat pan 21. The locking portions 30, 30 are hooked in the locking holes 43a, and the seat cover 22 is locked to the seat pan 21 side. Thus, even if the seat cover 22 is forcibly peeled off, the seat cover 22 does not fall off, and thus the seat cover 22 can be prevented from being stolen.

As described above, according to the first embodiment to which the present invention is applied, the seat structure includes the cushion body 20 constituting the seat portion, the seat pan 21 positioned on the lower surface of the cushion body 20, and the seat cover 22 covering the cushion body 20, wherein the end edge of the seat cover 22 includes the folded portion 46 hung on the seat pan 21, and the cover engagement structure 100 for engaging the folded portion 46 and the seat pan 21 with each other is provided on the inner side thereof. Therefore, the seat cover 22 can be fixed to the seat 10 with a simple structure, and a comfortable feeling of the seat cover 22 can be exhibited.

In the first embodiment, the cover engagement structure 100 is the hook and loop fastener 72. Therefore, flexible attachment of the seat cover 22 to the seat pan 21 can be achieved, the tension of the seat cover 22 can be adjusted, and simple attachment can be achieved.

In the first embodiment, a vertical wall 21c directed downward is provided at the end in the width direction of the seat bottom 21, and the cover engagement structure 100 is located on the inner side in the width direction of the vertical wall 21 c. Therefore, the seat cover 22 can be folded back and extended easily, and the engagement and the tension can be adjusted. Further, since the engagement structure is simple, the driver R can easily set a desired tension.

In the first embodiment, the fold-back portion 46 is provided with the anti-rollover mechanism 101. Therefore, the movement of the hook and loop fastener 72 can be restricted so as not to easily fall off, and the seat cover 22 can be reliably engaged with the seat 10.

In the first embodiment, the anti-rolling mechanism 101 is formed separately from the hook and loop fastener 72 and is located on the end portion side of the folded-back portion 46 with respect to the hook and loop fastener 72. Therefore, by pressing the remaining portion of the folded-back portion 46, the movement of the folded-back portion 46 can be reliably restricted, and the hook and loop fastener 72 can be prevented from being affected.

In the first embodiment, the anti-rollover mechanism 101 includes the hook 27a provided on the seat pan 21 and the hook hole 46b provided on the folded-back portion 46. Therefore, the seat cover 22 can be prevented from being rolled up with a simple shape.

In the first embodiment, the folded portion 46 is provided with a plurality of hooking holes 46 b. Therefore, the folded-back portion 46 can be flexibly locked to the seat pan 21 according to the length of the remaining portion.

[ second embodiment ]

Next, a second embodiment to which the present invention is applied will be described with reference to fig. 11. In the second embodiment, the same reference numerals are given to the same components as those of the first embodiment, and the description thereof will be omitted.

In the present second embodiment, the anti-wind-up mechanism 101 of the first embodiment is omitted. Therefore, in the folded-back portion 246 of the second embodiment, the hooking hole 46b is omitted. Further, the anti-rollover hooks 27a … are omitted from the lower surfaces of the inclined portions 227, 227 of the seat pan 221.

In the second embodiment, the surface fastener 272 is provided on the lower surface (inner surface of the vertical wall 221c) of the inclined portions 227, 227 of the seat pan 221, instead of the surface fastener 72 of the first embodiment. The fastening tape 272 of the second embodiment is formed with a plurality of barbed portions 272 a. The ratchet portion 272a is formed in a projection shape provided obliquely in a direction opposite to the stretching direction in which the seat cover 222 is stretched. The barbed portion 272a is set to an acute angle where the angle between the surface fastener 272 and the barbed portion 272a is small at the base end portion. Therefore, the distal end of the ratchet portion 272a faces the inside in the width direction (left-right direction) at the inclined portions 27, 27.

In the second embodiment, the cover engagement structure 200 of the second embodiment is composed of the folded portion 246 and the hook and loop fastener 272. When the folded portion 246 is pressed against the surface fastener 272, the barbed portion 272a of the surface fastener 272 is hooked on the mesh portion of the folded portion 246. At this time, when the driver R sits on the seat 210, the seat cover 222 is stretched, and the folded portion 246 attempts to move in a direction along the surface of the hook and loop fastener 272. Here, the distal end of the barbed portion 272a is inclined in a direction opposite to the stretching direction, and the barbed portion 272a enters the folded portion 246. That is, the distal end of the barbed portion 272a is inclined in the direction in which the folded-back portion 246 enters the surface fastener 272. Therefore, the folded-back portion 246 is less likely to be folded back from the surface fastener 272 by the ridge portion 272a, and the folded-back portion 246 can be prevented from coming off from the surface fastener 272.

As described above, according to the second embodiment to which the present invention is applied, the folded portion 246 is engaged with the seat pan 221 by the hook and loop fastener 272 as in the first embodiment, the seat cover 222 can be fixed to the seat 210 with a simple configuration, and the appropriate feeling of the seat cover 222 can be expressed.

In the second embodiment, the hook and loop fastener 272 provided on the seat pan 221 includes the barbed portion 272a, and the barbed portion 272a is provided obliquely in a direction facing the stretching direction of the seat cover 222. Therefore, the distal end of the barbed portion 272a protrudes in the direction of penetrating into the mesh-like portion of the folded portion 246 with respect to the stretching direction in which the seat cover 222 is stretched, and therefore, the folded portion 246 can be prevented from being folded.

In the second embodiment, although the anti-rolling mechanism 101 of the first embodiment is omitted, the following configuration may be adopted: by providing the anti-rollover mechanism 101, the seat cover 222 is more reliably fixed. That is, this may be the case: the seat bottom plate 221 is provided with a rollover prevention hook, and the folded-back portion 246 is provided with a hook hole to which the rollover prevention hook is hooked.

[ third embodiment ]

Next, a third embodiment to which the present invention is applied will be described with reference to fig. 12. In the third embodiment, the same reference numerals are given to the same components as those of the first embodiment, and the description thereof is omitted.

In the third embodiment, the seat cover 322 includes a mounting body 370 (fastening piece) separate from the mesh portion 40 instead of the folded-back portion 46. That is, the seat cover 322 is fixed to the seat pan 21 by the attachment body 370 and the hook and loop fastener 372, which is different from the first embodiment.

The seat 310 includes a seat bottom 21, a cushion body 20, a seat cover 322, and a bag body 23.

The seat cover 322 includes a mesh portion 340 and a skin portion 41. The mesh portion 340 is formed of a mesh material similarly to the mesh portion 40 of the first embodiment, but is different from the mesh portion 40 of the first embodiment in that it does not include the folded portions 46 and 46.

Seat cover 322 includes attachment body 370 … coupled to lower edges 340a, 340a of the left and right side portions of mesh portion 340. The seat cover 322 is fixed to the seat pan 21 by the attachment body 370 ….

The outer shape of the attachment body 370 … is the same as that of the folded portion 46 …, and is formed in a flap shape extending from the lower edges 340a, 340a of the mesh portion 340. The attachment body 370 is folded back so as to go around the lower surface of the seat pan 21, and is fixed to the lower surfaces of the inclined portions 27, 27.

The attachment body 370 may be made of a material having higher strength and rigidity than the mesh portion 340. The attachment body 370 may be made of a material having lower air permeability and higher water resistance than the mesh portion 340. For example, the mounting body 370 is formed of a sheet made of synthetic resin such as PVC leather.

The proximal end portion of the attachment body 370 is provided on the lower edge 340a of the mesh portion 340 so as to overlap from the outside, and is joined to the mesh portion 340 by a joint portion 371 formed on the lower edge 340 a. In the joint 371, the attachment body 370, the mesh portion 340, and the base end portion of the one sheet member 53a are integrally joined. Here, the joint 371 is formed by welding, but may be formed by sewing these three layers with a thread.

The attachment body 370 is fixed to the lower surface of the inclined portion 27 by a hook and loop fastener 372 (cover engagement structure). The hook and loop fastener 372 includes: a one-side surface 72 provided on the lower surface of the inclined portion 27; and the other side hook-and-loop surface 373 provided at the distal end portion of the mounting body 370. The one-side fastening surface 72 is the same as the fastening tape 72 of the first embodiment. The other side surface 373 has a pile loop surface formed by densely raising a pile loop. The cover engagement structure 300 of the third embodiment is constituted by the hook and loop fastener 372.

The hook surface formed by densely raising a hook shape and the loop surface formed by densely raising a loop shape are paired to form the hook and loop fastener 372 according to the third embodiment. One side of the hook-and-loop surface 72 is a hook surface, and the other side of the loop-and-loop surface 373 is a loop surface. In the third embodiment, the configuration in which the hook and loop are provided on different surfaces is described with respect to the hook and loop fastener 372, but any type of hook and loop fastener may be used, such as a type in which both the hook and loop are implanted on one surface and in which the hook surface and the loop surface are not distinguished from each other.

In the distal end portion 374 of the attachment body 370, three hook holes 370b (openings) capable of being hooked by the anti-rollover hook 27a are formed, similarly to the folded-back portion 46. The anti-rollover mechanism 301 is constituted by hooking holes 370b, 370b and an anti-rollover hook 27 a.

Further, the mounting bodies 370 … are arranged so as to be separated from each other in the front-rear direction along the lower edge 340 a. Therefore, even if the mounting body 370 is a member through which water is not easily passed, the water W is discharged downward from between the front and rear mounting bodies 370, 370 in the vicinity of the lower edge 340 a.

[ fourth embodiment ]

Next, a fourth embodiment to which the present invention is applied will be described with reference to fig. 13. In the fourth embodiment, the same reference numerals are given to the same components as those of the second embodiment, and the description thereof is omitted.

The fourth embodiment differs from the second embodiment in that a folded portion 446 is provided instead of the folded portion 246 of the second embodiment.

The other-side hook-and-loop surface 473 is provided on the upper surface of the folded-back portion 446 of the fourth embodiment. The one surface 272 provided on the inclined portions 227, 227 is configured in the same manner as the surface 272 of the second embodiment. The other side hook face 473 is formed as a loop face densely raised in a loop shape. That is, in the fourth embodiment, the pair of hook and loop fasteners 472 is formed by the one-side hook and loop surface 272 and the other-side hook and loop surface 473. The cover engagement structure 400 of the fourth embodiment is constituted by a hook and loop fastener 472.

In the fourth embodiment, the folded-back portion 446 is joined to the lower surfaces of the inclined portions 227, 227 by hooking the one-side hook surface 272 to the other-side hook surface 473 having a loop surface, which is another member, rather than hooking the one-side hook surface 272 to the mesh portion of the folded-back portion 446.

As described above, according to the fourth embodiment to which the present invention is applied, the folded-back portion 446 is engaged with the seat pan 221 by the hook and loop fastener 472, and the seat cover 422 can be fixed to the seat 410 with a simple configuration, and the feeling of comfort of the seat cover 422 can be reflected.

In the fourth embodiment, the one-side hook-and-loop surface 272 provided on the seat bottom 221 includes a ratchet portion 272a provided obliquely in a direction facing the direction in which the seat cover 422 is pulled. Therefore, the tip of the pawl 272a enters the other-side hook face 473 of the folded-back portion 446 when the seat cover 422 is pulled, and therefore, the folded-back portion 446 can be prevented from being folded back.

The first to fourth embodiments described above show one embodiment to which the present invention is applied, and the present invention is not limited to the above embodiments.

In the first embodiment, the surface fastener 272 having the hook 272a according to the second and fourth embodiments may be used instead of the surface fastener 72.

In the third embodiment, instead of the surface fastener 72, a surface fastener 72 having a mushroom-shaped hooking portion 72b or a surface fastener 272 having a hook portion 272a according to the second and fourth embodiments may be used as one of the paired surface fasteners.

In the third embodiment, the seat cover 322 is described as having the mesh portion 40, but the present invention is not limited to this. For example, the seat cover 322 may be entirely made of a material such as PVC leather having high water resistance.

In the first embodiment, the motorcycle 1 is exemplified as an example in which the seat is provided in the vehicle, but the present invention is not limited to this, and the present invention is applicable to a saddle-ride type vehicle having three wheels including two front wheels or two rear wheels, a saddle-ride type vehicle having four or more wheels, a scooter type vehicle such as a scooter type motorcycle, and the like. The seat of the present invention may be applied to a straddle-type seat other than a vehicle, such as furniture.

Description of the reference symbols

20: buffer member

21. 221: base plate

21c, 221 c: longitudinal wall

22. 222, 322, 422: cover component

27 a: hook for hanging articles

72. 272, 372, 472: adhesive fastening tape

46. 246, 370, 446: fastening piece

46b, 346 b: opening of the container

47. 374: end part

100. 200, 300, 400: cover clamping structure

101. 301: anti-rolling mechanism

272a, 472 a: shape of the protrusion

The claims (modification according to treaty clause 19)

(modified) a seat structure having a cushion member (20) constituting a seat portion, a floor plate (21, 221) located on a lower surface of the cushion member (20), and a cover member (22, 222, 322, 422) covering the cushion member (20), the seat structure being characterized in that,

the cover member (22, 222, 322, 422) has a fastening piece (46, 246, 370, 446) at an end edge thereof to be hung on the base plate (21, 221), and cover engaging structures (100, 200, 300, 400) for engaging the fastening piece (46, 246, 370, 446) with the base plate (21, 221) are provided on the inner sides thereof,

the cover engaging structure (100, 200, 300, 400) is a hook and loop fastener (72, 272, 372, 472),

the fastening piece (46, 370) is provided with an anti-rolling mechanism (101, 301),

the anti-curling mechanism (101, 301) is formed separately from the hook and loop fastener (72, 372), and is located closer to the end (47, 374) of the fastening piece (46, 370) than the hook and loop fastener (72, 372).

(modified) seat structure according to claim 1,

the bottom plate (21, 221) is provided with a vertical wall (21c, 221c) directed downward at the end in the width direction, and the cover engagement structure (100, 200, 300, 400) is located inside the vertical wall (21c, 221 c).

(modified) seat structure according to claim 1 or 2,

the anti-rollover mechanism (101, 301) has a hook (27a) provided on the bottom plate (21) and an opening (46b, 346b) provided on the fastening tab (46, 370).

(modified) the seat structure according to claim 3,

a plurality of the openings (46b, 346b) are provided in the fastening tab (46, 370).

(modified) seat structure according to any one of claims 1 to 4,

the hook and loop fastener (272, 472) provided on the bottom plate (221) is formed in a projection shape (272a, 472a) provided so as to be inclined in a direction facing the stretching direction of the cover member (222, 422).

(deletion)

(deletion)

(deletion)

Statement or declaration (modification according to treaty clause 19)

The modification of claim 1 is based on the description of the original claims 2, 4 and 5.

The modification of claim 2 is based on the description of the original claim 3.

The modification of claim 3 is based on the description of the original claim 6.

The modification of claim 4 is based on the description of the original claim 7.

The modification of claim 5 is based on the description of the original claim 8.

In the new claims 2-5, the cited claims are amended.

The original claims 6-8 are deleted as they are referred to in claims 3-5, respectively.