阅读说明：本技术 座椅 (Chair (Ref. now to FIGS) ) 是由 川谷慎治 谷口智 远城贞通 中村敏德 于 2018-06-26 设计创作，主要内容包括：抑制座垫的不希望的变形,且能够简易地安装罩。一种座椅(10),其具备：构成座部的座垫(12)；和覆盖座垫(12)的罩(13),该座椅(10)具备从下方支承座垫(12)的座椅底板(20),座椅底板(20)具备：第一底板(21),其以面来承受座垫(12)；以及第二底板(31),其从下方支承第一底板(21),并且被固定于第一底板(21),在第一底板(21)与第二底板(31)之间夹持有构成罩(13)的缘部的延伸部(13G)。(Undesired deformation of the seat cushion is suppressed and the cover can be easily mounted. A seat (10) is provided with: a seat cushion (12) constituting a seat portion; and a cover (13) that covers the seat cushion (12), the seat (10) including a seat pan (20) that supports the seat cushion (12) from below, the seat pan (20) including: a first base plate (21) which receives the seat cushion (12) on one side; and a second base plate (31) that supports the first base plate (21) from below, is fixed to the first base plate (21), and has an extension (13G) that constitutes the edge of the cover (13) interposed between the first base plate (21) and the second base plate (31).)

1. A seat, comprising: a seat cushion (12) constituting a seat portion and a cover (13) covering the seat cushion (12),

the seat is characterized in that,

the seat is provided with a bottom plate (20) for supporting the seat cushion (12) from below,

the bottom plate (20) is provided with: a first base plate (21) that receives the seat cushion (12) on one side; and a second bottom plate (31) that supports the first bottom plate (21) from below and is fixed to the first bottom plate (21),

an edge portion (13G) of the cover (13) is sandwiched between the first base plate (21) and the second base plate (31).

2. The seat according to claim 1,

the cross section of the second bottom plate (31) has a concavo-convex shape in which a convex portion (33A) and a concave portion (33B) repeatedly appear in the horizontal direction,

the first base plate (21) is supported from below by the upper surfaces of the respective convex portions (33A).

3. The seat according to claim 2,

the second bottom plate (31) is located on the inner peripheral side of the outer peripheral edge of the first bottom plate (21).

4. The seat according to claim 3,

the portion of the first base plate (21) and the second base plate (31) that sandwich the cover (13) is located on the outer peripheral side of the portion where the first base plate (21) and the second base plate (31) are fixed to each other.

5. The seat according to claim 3,

a notched section (34K) that is formed by omitting a portion of the region that overlaps the first base plate (21) is provided on the edge section (34) of the second base plate (31), and a claw section (23T) that engages with the notched section (34K) is provided on the first base plate (21).

6. The seat according to claim 5,

the edge part (34) of the second base plate (31) is provided with the notch parts (34K) at intervals,

the cover (13) is sandwiched between the first base plate (21) and portions of the second base plate (31) between the plurality of notches (34K).

7. The seat according to claim 3,

a temporary fixing section (21T) is provided on the first base plate (21), the cover (13) is fastened to the temporary fixing section (21T),

the first bottom plate (21), the second bottom plate (31), and the cover (13) are fastened together at the outer peripheral side than the temporarily fixing portion (21T).

Technical Field

The present invention relates to a seat provided with a seat cushion and a cover.

Background

The following structure has been proposed as a seat used in a motorcycle or the like: a mesh surface seat having air permeability and elasticity is sandwiched between an outer clamping frame and an inner clamping frame from above and below (see, for example, patent document 1). The outer and inner clamping frames are formed in a quadrangular frame shape.

Disclosure of Invention

Problems to be solved by the invention

However, the mesh seat has a disadvantage in terms of cushioning properties as compared with a seat structure including a seat cushion and a cover covering the seat cushion.

In the case of applying a seat structure having a separate seat cushion and cover instead of a mesh seat, the frame has a frame shape, and therefore, it is difficult to support inside the frame so as to suppress deformation of the seat cushion. In addition, a structure having an additional mounting cover is required.

Accordingly, an object of the present invention is to suppress undesired deformation of a seat cushion and to enable easy mounting of a cover.

Means for solving the problems

The specification includes the entire contents of Japanese patent application laid-open application No. 2017-129775 applied in 6/30/2017.

In order to achieve the above object, the present invention provides a seat comprising: a seat cushion 12 constituting a seat portion, and a cover 13 covering the seat cushion 12, wherein the seat includes a floor plate 20 supporting the seat cushion 12 from below, and the floor plate 20 includes: a first base plate 21 for receiving the seat cushion 12 on one side; and a second base plate 31 that supports the first base plate 21 from below, is fixed to the first base plate 21, and sandwiches an edge portion 13G of the cover 13 between the first base plate 21 and the second base plate 31.

In the above configuration, the second base plate 31 may have a cross section having a concave-convex shape in which a convex portion 33A and a concave portion 33B are repeated in the horizontal direction, and the first base plate 21 may be supported from below by the upper surfaces of the convex portions 33A.

In the above configuration, the second base plate 31 may be located on the inner circumferential side of the outer circumferential edge of the first base plate 21.

In the above configuration, a portion of the first bottom plate 21 and the second bottom plate 31 that sandwich the cover 13 may be located on an outer peripheral side of a fixed portion where the first bottom plate 21 and the second bottom plate 31 are fixed to each other.

In the above configuration, the edge portion 34 of the second chassis 31 may be provided with a notch portion 34K that is formed by omitting a portion of the region overlapping the first chassis 21, and the first chassis 21 may be provided with a claw portion 23T that engages with the notch portion 34K.

In the above configuration, the notch 34K may be provided at an interval in the edge 34 of the second chassis 31,

the cover 13 is sandwiched between the portions of the second substrate 31 between the plurality of notches 34K and the first substrate 21.

Further, in the above configuration, a temporarily fixing portion 21T may be provided in the first base plate 21, the cover 13 may be locked to the temporarily fixing portion 21T, and the first base plate 21, the second base plate 31, and the cover 13 may be collectively fastened at an outer peripheral side than the temporarily fixing portion 21T.

Effects of the invention

In the present invention, a seat cushion constituting a seat portion is supported from below by a floor plate, the floor plate including: a first base plate that receives the seat cushion on one side; and a second base plate that supports the first base plate from below and is fixed to the first base plate, and an edge portion of a cover that covers the seat cushion is sandwiched between the first base plate and the second base plate.

Further, since the cross section of the second base plate has a concave-convex shape in which the convex portion and the concave portion are repeated in the horizontal direction, and the first base plate is supported from below by the upper surfaces of the convex portions, the strength of the second base plate can be efficiently increased, and the supporting strength of the second base plate with respect to the first base plate can be easily secured. Further, the second bottom plate is located on the inner peripheral side of the outer peripheral edge of the first bottom plate, and therefore, the appearance of the second bottom plate is easily prevented from being exposed.

Further, since a portion where the first bottom plate and the second bottom plate sandwich the cover is located on the outer peripheral side of a fixing portion where the first bottom plate and the second bottom plate are fixed to each other, it is easy to independently perform an operation of sandwiching the cover and an operation of fixing the first bottom plate and the second bottom plate.

Further, since the edge portion of the second chassis is provided with a notch portion that is formed by omitting a portion of the region overlapping the first chassis, and the first chassis is provided with a claw portion that engages with the notch portion, the first chassis and the second chassis can be fixed without using a fastening member.

Further, since the cover is sandwiched between the first substrate and the portions of the second substrate between the plurality of notch portions, the cover can be held in a large area. Therefore, even if the cover is made of a mesh material, it is easy to sufficiently secure the holding force of the cover.

Further, the first base plate is provided with a temporary fixing portion to which the cover is fastened, and the first base plate, the second base plate, and the cover are fastened together on the outer peripheral side of the temporary fixing portion, so that the mounting work of the cover becomes easy, and the assembling and disassembling work of the seat becomes easy by performing the fastening in common.

Drawings

Fig. 1 is a perspective view showing a seat peripheral portion of a motorcycle including a seat according to a first embodiment.

Fig. 2 is an enlarged view of a cross section near the surface of the seat.

Fig. 3 is a view showing a cross section when the seat is viewed from the rear of the seat.

Fig. 4 is a view showing a cross section when the seat of the second embodiment is viewed from the rear of the seat.

Fig. 5 is a view of fig. 4 as viewed from below the seat.

Fig. 6 is a sectional view taken along line VI-VI in fig. 5.

Fig. 7 is a view showing a cross section when the seat of the third embodiment is viewed from the rear of the seat.

Fig. 8 is a view of moving the second base plate in fig. 7 to the lower side.

Fig. 9 is a sectional view taken along line IX-IX in fig. 7.

Fig. 10 is a view showing a cross section when the seat of the fourth embodiment is viewed from the rear of the seat.

Detailed Description

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(first embodiment)

Fig. 1 is a perspective view showing a seat peripheral portion of a motorcycle including a seat according to a first embodiment. In the description, the directions of the front, rear, left, right, and up and down are the same as the directions of the vehicle body, unless otherwise specified. In the drawings, the reference numeral "front" denotes the vehicle body front, the reference numeral "up" denotes the vehicle body upper side, and the reference numeral "right" denotes the vehicle body right side.

The seat 10 is disposed between the fuel tank 2 and the rear cover 3 of the motorcycle 1, and constitutes a seating portion (passenger seat) on which a passenger sits. In the case where the vehicle body of the motorcycle 1 is different, the seat 10 is not limited to the above-described position. For example, in the case of a vehicle body provided with a box-shaped cover covering an air cleaner or a storage box at the position of the fuel tank 2, the seat 10 is disposed between the box-shaped cover and the rear cover 3.

Fig. 2 is an enlarged cross-sectional view of the vicinity of the surface of the seat 10.

The seat 10 includes: a seat cushion 12 constituting a seat portion; a cover 13 covering the seat cushion 12; and a seat pan 20, which will be described later, that constitutes a floor of the seat 10. The seat cushion 12 is formed by a single-layer mesh seat cushion made of a single-layer mesh material, and the cover 13 is formed by a mesh cover made of a mesh material 100.

The seat cushion 12 is formed by bending resin fibers (also referred to as continuous linear bodies) 12A made of a thermoplastic elastomer to form loops, and joining the contact portions of the loops by welding or the like to form a three-dimensional net structure. That is, the seat cushion 12 is a thermoplastic elastic mesh body. This provides the seat cushion 12 having excellent cushioning properties and durability, and excellent air permeability. In particular, the seat cushion 12 is excellent in air permeability compared to a conventional seat cushion for a vehicle made of polyurethane.

Further, the cushioning property, air permeability, durability (durability of cushioning property), and the like can be adjusted by adjusting the material, fiber diameter, hollow ratio (hollow area per unit area), and the like of the fibers 12A constituting the seat cushion 12. Thus, even with a relatively thin seat cushion 12, sufficient cushioning properties, air permeability, and durability can be obtained. Further, since a gap is formed in the entire seat cushion 12, heat radiation and water drainage (water permeability) are also obtained, which contributes to weight reduction of the seat 10.

The seat cushion 12 is not limited to the thermoplastic elastic mesh, and may have a three-dimensional mesh structure using a material other than a thermoplastic elastomer.

The net material 100 constituting the cover 13 is formed in a three-layer structure composed of a woven fabric formed by weaving a fiber material composed of synthetic resin or the like. That is, the mesh material 100 is formed of a three-dimensional fabric including: a surface layer 101 constituting an exposed surface; a back side layer 102 constituting a back side; and a connecting layer 103 connecting the surface layer 101 and the back layer 102. The top sheet 101 and the back sheet 102 are made of a mesh-like fabric having a porous structure and are air-permeable. The top sheet 101 is preferably made of a fibrous material having a good surface texture and low water retentivity.

The connecting layer 103 is formed by connecting the surface layer 101 and the back layer 102 with a monofilament connecting thread 103A. More specifically, the connecting layer 103 is formed of a fabric having a cross structure in which at least two connecting yarns 103A cross each other when the surface layer 101 and the back layer 102 are connected to each other. 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 cover 13 as the three-dimensional fabric can be easily achieved at the same time. Further, since the gap is formed in the entire cover 13, heat radiation and drainage are also obtained, which contributes to weight reduction of the seat 10.

Thus, in the present configuration, the seat cushion 12 and the cover 13 both provide air permeability, heat dissipation, and the like of the seat 10. Since the seat cushion 12 and the cover 13 are formed of resin, they can be formed into a structure having stronger water resistance than the case of using natural fibers.

The connecting layer 103 is not limited to the cross structure, and may be a column structure connecting the surface layer 101 and the back layer 102 substantially perpendicularly, or a truss structure in which at least two connecting threads 103A and the fabric on both the front and back sides form a triangle. The web material 100 may have a multilayer structure other than three layers. The surface layer 101 or the back layer 102 may be replaced by a single mesh, and a part or all of each of the layers 101 to 103 may be made of a material other than a woven fabric. Further, the structure is not limited to the multilayer structure, and a known mesh material can be widely used.

Fig. 3 is a view showing a cross section of the seat 10 as viewed from the seat rear.

As shown in fig. 3, the seat pan 20 includes: a first base plate 21 on which the seat cushion 12 is placed; and a second bottom plate 31 that supports the first bottom plate 21 from below.

The first floor 21 is a plate-like member extending over the entire bottom surface of the seat cushion 12, and the entire bottom surface of the seat cushion 12 is placed on the upper surface 22 thereof. The upper surface 22 of the first bottom plate 21 has a curved surface 22A curved to protrude upward, but has a substantially planar shape, and the bottom surface of the seat cushion 12 is brought into close contact with the curved surface 22A by the weight of the seat cushion 12 and the force applied from the cover 13 covering the seat cushion 12 from above.

Here, the seat cushion 12 of the three-dimensional net structure has a flat bottom surface, and as shown in fig. 3, the bottom surface of the seat cushion 12 is arranged in close contact with the upper surface of the first bottom plate 21 of a substantially planar shape having a curved surface 22A protruding upward. Thereby, the upper surface of the seat cushion 12 is bent into the same shape as the upper surface 22 of the first floor 21. This makes it easy to match even when a plate-shaped seat cushion 12 having a flat bottom surface is used, and the upper surface of the seat cushion 12 can be easily formed into a rounded shape suitable for the seat surface.

The first base plate 21 integrally has an edge 23 constituting the outer peripheral portion of the curved surface 22A. The upper surface 23A of the rim 23 is a flat surface, and the lower surface of the seat cushion 12 protruding from the curved surface 22A is supported by the entire upper surface 23A. Further, the upper right and left corners (denoted by the reference symbol X in fig. 3) of the seat cushion 12 are gently curved by a force applied from the cover 13 (covering the seat cushion 12 from above).

A recess 23C that is recessed upward is formed in the lower surface 23B of the rim 23. In fig. 3, the upper surface 23A of the edge 23 is a horizontal flat surface, but may be a curved surface or an inclined surface connected to the curved surface 22A.

The first base plate 21 is provided to receive the seat cushion 12 having a flat bottom surface on its surface, and does not need to have strength enough to support the load of the occupant, and the first base plate 21 is formed of a plate material that is elastically deformed by a relatively light force, for example, a thin plate material made of synthetic resin, and is formed at low cost and light weight. Therefore, the material of the first base plate 21 is not limited to a hard material, and may be a soft material.

The second floor panel 31 is a member that supports the first floor panel 21 from below to suppress deformation of the first floor panel 21, and has sufficient strength to sufficiently support the load of the occupant. For example, the second floor 31 is formed of a hard material that satisfies the strength (e.g., bending rigidity) required for a general seat floor.

The second base plate 31 has a portion overlapping the first base plate 21, and a fastening member (tapping screw in this structure) 32 is inserted from below at a certain portion of the overlapping portion. The fastening member 32 penetrating the second base plate 31 is fastened to the first base plate 21. Thereby, the second bottom plate 31 and the first bottom plate 21 are fixed by the fastening member 32.

In fig. 3, the fastening member 32 is fastened to the boundary portion between the curved surface 22A and the edge portion 23 of the first chassis 21, but the fastening member 32 is not limited to a fastening portion (corresponding to a fastening portion or a fixing portion). Further, although the case where the fastening member 32 is a tapping screw has been described, other fixing members such as a clip used when fixing a cover member or the like to a vehicle body may be applied instead of the tapping screw.

The second base plate 31 integrally includes: a second floor main body 33 that supports the region of the first floor 21 other than the edge portion 23 from below; and an edge portion 34 (hereinafter referred to as a second floor side edge portion) which protrudes outward from the second floor main body 33 and constitutes an outer peripheral portion of the second floor panel 31.

The second bottom plate body 33 is formed of a plate material having a cross section in which a convex portion 33A protruding upward and a concave portion 33B recessed downward are continuously formed in a horizontal direction. As a result, the second chassis main body 33 has improved bending rigidity and the like as compared with the case of a flat plate shape having the same thickness.

The upper surfaces of the plurality of convex portions 33A are brought into surface contact with the lower surface of the first base plate 21, whereby the curved surface 22A of the first base plate 21 is supported to have a predetermined curved shape. Fig. 3 shows a case where the convex portion 33A and the concave portion 33B are continuous in the vehicle width direction. However, the present invention is not limited to the vehicle width direction, and a part or the whole may be continuous in the front-rear direction. By forming the cross section in such a concave-convex shape, advantages such as: the second chassis main body 33 can be made lightweight while easily ensuring bending rigidity.

In addition, the sectional shape of the second chassis main body 33 may not be limited to the concavo-convex shape section. In this case, the cross-sectional shape and material of the second floor body 33 can be appropriately changed within a range in which the first floor 21 is not deformed by a load applied from the occupant.

The second floor side edge 34 is positioned below the edge 23 of the first floor 21, and supports the upper surface 23A of the edge 23 of the first floor 21 in a predetermined flat shape. Further, the cover 13 is sandwiched between the second floor side edge 34 and the edge 23 of the first floor 21.

Specifically, the upper surface 34A of the second floor side edge portion 34 integrally includes a protrusion 34B that protrudes upward toward the recess 23C provided in the edge portion 23 of the first floor 21. The lower surface 34C of the second floor side edge portion 34 is formed as a horizontal surface. The cover 13 is integrally provided with an extending portion 13G, and when the cover 13 is bent along the edge portion 23 of the first chassis 21, the extending portion 13G extends between the edge portion 23 and the second chassis side edge portion 34. The extending portion 13G is sandwiched between the edge portion 23 of the first chassis 21 and the second chassis side edge portion 34, and extends to a position not overlapping with the fastening member 32.

In this way, the extended portion 13G of the cover 13 is sandwiched between the edge portion 23 of the first chassis 21 and the second chassis side edge portion 34, and therefore, the extended portion 13G made of the mesh material 100 can be held in a large area. Therefore, it is easy to sufficiently secure the holding force of the extension portion 13G.

As shown in fig. 3, the extending portion 13G is sandwiched between the recess 23C of the edge portion 23 and the projection 34B of the second floor side edge portion 34 in the bent state. This makes it difficult for the extension portion 13G to fall off from the clamping portion. That is, the recess 23C of the edge 23 and the projection 34B of the second floor side edge 34 can function as a retaining portion for preventing the extension portion 13G from coming off from the clamped portion. The extension 13G may be made of a material other than the mesh material 100.

Further, the outer peripheral edge 34D (corresponding to the outer peripheral edge of the second base plate 31) of the second base plate side edge portion 34 is positioned on the inner peripheral side of the outer peripheral edge 23D (corresponding to the outer peripheral edge of the first base plate 21) of the edge portion 23 of the first base plate 21. This makes the outer peripheral edge 34D of the second base plate 31 less visible from the outside, and can prevent the second base plate 31 from being exposed to the outside.

As described above, the portion where the extending portion 13G is sandwiched between the first base plate 21 and the second base plate 31 is located on the outer peripheral side of the fixed portion (the fastening portion of the fastening member 32) where the first base plate 21 and the second base plate 31 are fixed to each other. With this configuration, as shown in fig. 3, the appearance of the fastening member 32 can be suppressed from being exposed. Further, the work of inserting and clamping the extension portion 13G between the first base plate 21 and the second base plate 31 and the fastening work of the fastening member 32 can be performed independently, and each work can be easily performed.

As described above, in the present embodiment, the seat pan 20 that supports the seat cushion 12 from below includes: a first base plate 21 for receiving the seat cushion 12; and a second base plate 31 that supports the first base plate 21 from below and is fixed to the first base plate 21. The extension 13G constituting the edge of the cover 13 is sandwiched between the first base plate 21 and the second base plate 31. According to this structure, the bottom surface of the seat cushion 12 is supported by the first floor 21, and unwanted deformation of the seat cushion 12 can be suppressed by the second floor 31. The cover 13, which is separate from the seat cushion 12, can be attached by the first floor plate 21 and the second floor plate 31.

That is, in the present embodiment, the required functions of the seat pan 20 are shared between the first floor 21 and the second floor 31, so that the seat cushion 12 can be appropriately supported and the cover 13 can be easily attached. Further, since the seat cushion 12 is curved by curving the upper surface shape of the first bottom plate 21, even when a flat seat cushion is used as the seat cushion 12, the seat cushion 12 is curved, and the seat surface can be curved. Thus, the seat 10 can be obtained that uses the seat cushion 12 formed in the three-dimensional mesh structure having the same thickness and has a suitably curved surface, without requiring the cost of manufacturing the seat cushion with a locally different thickness.

The second base plate 31 has a cross section having a concave-convex shape in which the convex portion 33A and the concave portion 33B are repeated in the horizontal direction, and the first base plate 21 is supported from below by the upper surfaces of the convex portions 33A. This configuration is advantageous in improving the strength of the second base plate 31, and facilitates securing the supporting strength of the second base plate 31 with respect to the first base plate 21. Further, the second bottom plate 31 is positioned on the inner peripheral side of the outer peripheral edge of the first bottom plate 21, and therefore, the appearance of the second bottom plate 31 is easily prevented from being exposed.

Further, a portion of the first base plate 21 and the second base plate 31 sandwiching the extension portion 13 is located on the outer peripheral side of the base plates 21 and 31 with respect to a fixing portion (fixing portion of the fastening member 32) where the first base plate 21 and the second base plate 31 are fixed to each other. With this configuration, the work of holding the cover 13 and the work of fixing the first base plate 21 and the second base plate 31 can be easily performed independently, which is advantageous in improving workability.

(second embodiment)

Fig. 4 is a view showing a cross section of the seat 10 of the second embodiment when viewed from the seat rear. Fig. 5 is a view of fig. 4 as viewed from below the seat 10. In addition, fig. 4 is a cross section along the line IV-IV in fig. 5. Further, fig. 6 is a cross section along the line VI-VI in fig. 5.

The second embodiment is different from the first embodiment in that it has an engagement structure in which the first bottom plate 21 and the second bottom plate 31 are engaged with each other by a claw portion 23T described later. The same portions as those of the first embodiment are denoted by the same reference numerals, and different portions are described.

As shown in fig. 4, the edge portion 23 of the first base plate 21 integrally includes: a lower convex portion 23J projecting downward on the outermost periphery; and an upper concave portion 23K recessed upward adjacent to the inner periphery of the lower convex portion 23J. The lower convex portion 23J extends along the edge portion 23 of the first base plate 21. As shown in fig. 4 to 6, a plurality of claw portions 23T projecting downward are integrally provided in the upper recess portion 23K at intervals along the edge portion 23 of the first base plate 21.

A plurality of notches 34K (see fig. 5 and 6) are provided at intervals along the edge portion 34 of the second chassis 31, and the notches 34K are formed by omitting a part of the region overlapping the first chassis 21. As shown in fig. 4, in the second base plate 31, the portion between the adjacent notch portions 34K is formed as an upper convex portion 34J, and the upper convex portion 34J protrudes upward, so that the extending portion 13G of the cover 13 can be sandwiched between the upper convex portion 34J and the upper concave portion 23K of the first base plate 21.

The claw portion 23T projecting downward from the first bottom plate 21 is formed in a claw shape to be locked to the lower surface of the upper convex portion 34J of the second bottom plate 31. Further, the upper convex portion 34J of the second bottom plate 31 is fitted between the adjacent claw portions 23T. Thereby, the horizontal displacement between the first bottom plate 21 and the second bottom plate 31 is restricted, and the first bottom plate 21 and the second bottom plate 31 are positioned. As shown in fig. 5, the extension portion 13G of the cover 13 integrally includes a plurality of small pieces 13H at intervals in the front-rear direction, and the small pieces 13H enter between the upper concave portion 23K of the first base plate 21 and the upper convex portion 34J of the second base plate 31.

The small piece portion 13H is formed in a triangular shape, and when the extending portion 13G of the cover 13 is bent along the lower surface of the edge portion 23 of the first floor 21, the small piece portion 13H gradually narrows in width toward the inner peripheral side (corresponding to the vehicle width center) as shown in fig. 5. These small pieces 13H are positioned between the adjacent claw portions 23T of the first bottom plate 21, and thereby sandwiched between the upper concave portion 23K of the first bottom plate 21 and the upper convex portion 34J of the second bottom plate 31.

As shown in fig. 4, in the present configuration, a concave portion 23V that is recessed upward is provided in the upper concave portion 23K of the first base plate 21, and a protrusion 34V that protrudes upward is provided in the upper convex portion 34J of the second base plate 31. The tab portion 13H is sandwiched by the recess 23V and the projection 34V in the flexed state. This further restricts the displacement of the small piece portion 13H from the clamping position. The small piece portion 13H may be provided with a through hole into which the protrusion 34V is inserted. The small piece portion 13H is less likely to be displaced by the engagement of the protrusion 34V with the through hole.

As described above, in the present embodiment, the second chassis side edge portion 34 is provided with the plurality of notches 34K that are formed by omitting a portion of the region overlapping the first chassis 21, and the first chassis 21 is provided with the plurality of claw portions 23T that engage with the notches 34K. With this configuration, the first chassis 21 and the second chassis 31 can be fixed without using a fastening member such as a tapping screw.

In the present embodiment, the extension portion 13G (the small portion 13H) of the cover 13 is also sandwiched between the second floor side edge portion 34 (the upper convex portion 34J) and the edge portion 23 (the upper concave portion 23K) of the first floor 21. This makes it possible to hold the cover 13 in a large area, and to easily secure a sufficient holding force of the cover 13.

(third embodiment)

Fig. 7 is a view showing a cross section of the seat 10 of the third embodiment when viewed from the seat rear. Fig. 8 is a view of the second bottom plate 31 in fig. 7 moved downward. Further, fig. 9 is a cross section along line IX-IX in fig. 7.

The third embodiment is different from the second embodiment in that the upper recessed portions 23K recessed upward in the edge portion 23 of the first base plate 21 do not extend annularly along the edge portion 23, and the upper recessed portions 23K are provided at a predetermined interval. The third embodiment is different from the second embodiment in that an upper convex portion 34J of the second bottom plate 31 is fitted into a portion 23W (see fig. 8 and 9) between adjacent upper concave portions 23K, and a claw portion 23T extending downward from the portion 23W is locked to a lower surface of the upper convex portion 34J.

Fig. 7 is a substantially identical cross section as compared with fig. 4 of the second embodiment, except that the position of the recess 33B is lowered. On the other hand, in the third embodiment, as shown in fig. 8, the portion 23W between the adjacent upper concave portions 23K protrudes downward to substantially the same position as the lower convex portion 23J. Hereinafter, this portion 23W is referred to as a lower convex portion 23W. The claw portions 23T extend downward from the lower convex portions 23W, and each claw portion 23T is engaged with the lower surface of the upper convex portion 34J (corresponding to the portion between the adjacent notched portions 34K) of the second base plate 31. In the second embodiment, the claw portion 23T is shortened as compared with the third embodiment.

With the above configuration, the same effects as those of the second embodiment can be obtained in which the first chassis 21 and the second chassis 31 can be fixed without using a fastening member such as a tapping screw. In the present embodiment, the upper convex portions 34J of the second bottom plate 31 are fitted into the adjacent lower convex portions 23W of the first bottom plate 21, whereby the horizontal displacement between the first bottom plate 21 and the second bottom plate 31 is restricted.

In each of the above embodiments, the first base plate 21 may be provided with a temporary fixing portion to be locked with the cover 13. Another example using the temporary fixing section will be described as a fourth embodiment.

(fourth embodiment)

Fig. 10 is a view showing a cross section of the seat 10 of the fourth embodiment when viewed from the seat rear. The same portions as those in the above embodiments are denoted by the same reference numerals, and different portions are described.

In the fourth embodiment, the first base plate 21 is provided with a projection 21T on the inner peripheral side of the fastening member 32, which serves as a temporary fixing portion to be locked to the cover 13. The projection 21T projects inward (corresponding to the inner side in the vehicle width direction) and engages with a through hole 13P provided at the end of the extending portion 13G of the cover 13.

According to this configuration, the cover 13 can be locked to the first base plate 21 without using both the fastening member 32 and the second base plate 31. Thus, the cover 13 can be attached in a state where the seat cushion 12 is placed on the first floor 21, that is, a sub-assembly of the first floor 21, the seat cushion 12, and the cover 13 can be formed. By forming the sub-assembly, the subsequent operations, that is, the operations such as the mounting of the second chassis 31 and the mounting of the fastening member 32 can be easily performed.

Further, the projection 21T preferably projects toward the inner peripheral side. According to this configuration, even if a force for moving the extension portion 13G of the cover 13 to the outer peripheral side or a force for moving the extension portion 13G in the vertical direction acts on the extension portion 13G of the cover 13, the extension portion 13G of the cover 13 is less likely to be detached from the projection 21T. However, the projecting direction and shape of the projection 21T may be changed within a range where the extension portion 13G of the cover 13 is difficult to detach, and a temporary fixing structure other than the projection 21T may be applied.

The fastening member 32 is provided on the outer peripheral side of the projection 21T functioning as the temporary fixing portion. Thus, the projection 21T does not interfere with the fastening operation of the fastening member 32, and the cover 13 can be temporarily fixed by the projection 21T to fasten the fastening member 32 in a state where the cover 13 is appropriately stretched. Therefore, the fastening operation of the fastening member 32 becomes easy.

The fastening member 32 of the present embodiment penetrates the second base plate 31 and the extension portion 13G constituting the edge portion of the cover 13 from below, and then is fastened to the first base plate 21. Thereby, the second base plate 31, the cover 13, and the first base plate 21 are fastened (fixed) together by the same fastening member 32. Thus, the number of the fastening members 32 is reduced as compared with the case where they are fastened by separate fastening members 32, and the assembling and disassembling work of the seat 10 is facilitated.

The above embodiment is merely one embodiment of the present invention, and any modification and application can be made without departing from the spirit of the present invention.

For example, the case where the cover 13 is a mesh cover is described, but the present invention is not limited to the mesh cover. The seat cushion 12 is not limited to a single-layer mesh seat cushion, and may be made of, for example, polyurethane.

Further, the shape of the seat 10 may be changed as appropriate. In the above-described embodiments, the present invention is applied to a single seat dedicated to a driver, but the present invention may be applied to a tandem seat on which a driver and a fellow passenger sit, or a single seat dedicated to the fellow passenger. The present invention can be applied to a seat for a vehicle other than a motorcycle. For example, the present invention is not limited to motorcycles (including bicycles with prime movers), and may be applied to seats of saddle-ride type vehicles including other motorcycles such as bicycles, three-wheeled vehicles such as ATVs (all terrain vehicles), and four-wheeled vehicles. The present invention may be applied to seats other than vehicles.

Description of the reference symbols

1: motorcycles (saddle-ride type vehicles);

10: a seat;

12: a seat cushion;

13: a cover;

13G: an extension portion (edge portion of the cover);

20: a seat pan;

21: a first base plate;

21T: a protrusion (temporary fixing portion);

23: an edge portion (edge portion of the first base plate);

23T: a claw portion;

23W: a lower convex portion;

31: a second base plate;

33A: a convex portion;

33B: a recess;

34: a second floor side edge portion (edge portion of the second floor);

34K: a notch portion.