JP2002320530A - Net seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To fit a net body a free state shape of which is smaller than a completed body shape by covering a seat frame while elastically deforming the net body, and generate a stretching force in order to stretch the net body on the seat frame by a simpler structure. SOLUTION: This net seat 1 is equipped with the seat frame and the net body 20. The net body 20 is formed into a cylindrical shape, the free state shape of which is smaller than the completed body shape. The net body 20 is fitted on the seat frame, wherein the skeleton of the completed body shape of the net seat 1 is formed, by covering the seat frame while elastically deforming. Therefore, the net body 20 is stretched, and constitutes a favorable sitting surface 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a net sheet, and more particularly to a net sheet suitable for use in vehicles such as automobiles.

[0002]

2. Description of the Related Art As a seat of a vehicle such as an automobile or a train, there is a net seat whose seating surface is formed of a net body. The net seat has, for example, as shown in FIG. 6, a seat frame 62 made of pipes formed in the approximate shape of the seat, and a net body 6 is provided on the seating surface side of the seat frame 62.
6 is constructed. In the net seat 60 shown in FIG. 6, a locking piece 64 formed by cutting and raising a pipe wall at a predetermined interval is provided on a seating surface side of a seat frame 62 made of a metal pipe. A wire 68 is sewn along the edge of the net body 66. The net body 66 is stretched by locking the wire 68 to the locking piece 64.

[0003]

In such a net sheet 60, the net body 66 must be stretched. For this reason, in the conventional net sheet 60 shown in FIG. 6, the wire 68 is locked to the locking piece 64 of the seat frame 62 in a state where the net body 66 is stretched.

[0004] Therefore, the problem to be solved by the present invention is to elastically deform a net body smaller than the completed body shape in the free state into the seat frame in order to stretch the net body to the seat frame with a simpler structure. In other words, it is intended to generate a stretching force while covering and mounting.

[0005]

Means for Solving the Problems In order to solve the above problems, a net sheet according to the present invention is a net sheet in which a seating surface is constituted by a stretched net body, and has a shape of a completed net sheet. In the free state shape, the tubular net body formed smaller than the completed body shape is attached to the seat frame on which the skeleton is formed while being elastically deformed and covered. In this net sheet, the net body is formed in a tubular shape in a free state smaller than the shape of the completed net sheet. For this reason, the net body is provided in a stretched state by being elastically stretchable and attached so as to cover the seat frame.

In the above-mentioned net sheet, when the seat frame has a configuration in which a virtual outer peripheral length of a portion inserted into the tubular net body increases from one direction to another direction, By inserting the cylindrical net from the side having the smaller virtual outer peripheral length, the net can be easily attached to the seat frame. In addition, in this specification, the "virtual outer peripheral length of the portion inserted into the tubular net body" is the shortest length in the circumferential direction when the tubular net body surrounds the seat frame. That is, it refers to the circumference indicated by the thin line X in FIG.

According to the present invention, in any one of the above net seats, the net body has a seating surface side and a rear surface side joined at both open ends of a tubular portion. In this net body, the tubular body of the net body is inserted into the seat frame, and the seat body side and the back side are joined at both open ends of the net body, so that the net body covers the seat frame. Is mounted as follows. The net body obtains tension in the width direction of the seat by inserting the tubular portion into the seat frame. Then, the seating surface side and the back surface side are joined at both open ends of the net body, so that the seat length direction (direction perpendicular to the width direction).
To get the tension. By obtaining tension in these two directions, the net body is stretched with respect to the seat frame.

[0008] In the net seat having such a net body, the seat frame has a side member that constitutes both side portions of the net sheet and has a bulge protruding toward the seating surface. The projecting portion may be inserted into the net body, and both open ends of the net body may be arranged on the back side of the seating surface with respect to the bulging portion. In this embodiment, in a state where the tubular portion of the net body is inserted through the bulging portion, on the back side of the seating surface from the bulging portion,
When the seating surface side and the rear surface side of the both open ends of the net body are coupled to each other, a tension acts on the seating surface of the net body in a thickness direction of the net seat (a direction connecting the seating surface and the rear surface), The seating surface is formed in a concave shape.

Alternatively, in the present invention, there is provided a net sheet in which a seating surface side and a back side thereof are joined at both open ends of the cylindrical portion of the net body, wherein at least one of the open ends of the net body is provided. May be characterized in that a seating surface side and a rear surface side thereof are joined at an intermediate portion of the seat frame. In this net seat, the seating surface side and the back side of the opening end of the net body can be joined at a predetermined intermediate portion of the seat frame. For example, in a mode in which the configuration of the present net seat is applied to the seat back, the upper opening end of the tubular portion of the net body is disposed below the uppermost end of the seat frame, and the seating surface side and the back side at this upper opening end. And a net sheet formed with an opening through which a constituent member of the seat frame can be inserted. In the net sheet having this configuration, the position where the open end of the net body is joined can be set to a predetermined portion on the seat frame regardless of the shape of the seat frame, that is, the entire shape of the net sheet.
Therefore, the net body can be formed in various seating surface shapes, or provided so as to maintain a predetermined tension.

[0010]

Next, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a perspective view of a vehicle net sheet according to one embodiment of the present invention. The net seat 1 includes a seat 3 and a backrest 5. In the net sheet 1 of the present embodiment, the backrest 5 has a configuration according to the present invention, and has a seat frame 10 shown in FIG. 2 and a net body 20 shown in FIG.
The seat 3 may be provided with a pad similar to that of the related art, or may be provided with a net body according to the present invention.

The seat frame 10 is formed of the net sheet 1
Is a member that forms the skeleton of The seat frame 10 can be formed in various shapes. The seat frame 10 typically has a pair of side members 12 and 13 formed in the shape of each side of the net sheet 1. When the two side members 12, 13 are fixedly arranged at a predetermined interval, that is, at the width of the net sheet 1, the net sheet 1
Is formed. In the present embodiment, the side members 12,
13 are both side portions of the long member which is formed in a curved shape at the upper part of the backrest 5 as shown in FIG.
A long member extending to the back side of the seating surface is formed continuously with the both side portions. The top formed by the curved elongated member is formed on the headrest skeleton 15.

The seat frame 10 preferably has a virtual outer peripheral length of a portion inserted into the cylindrical net body 20.
It is formed in a shape that increases from one direction to the other. In the embodiment shown in FIG. 2, the distance between the side members 12 and 13 is gradually increased from the headrest skeleton 15 side to the seat portion 3 side, and the thickness direction of the net sheet 1 of the side members 12 and 13. The length has been increased. For this reason, the virtual outer peripheral length of the seat frame 10 increases downward from the upper portion of the backrest 5 of the seat frame 10.

Preferably, bulging portions 14 protruding toward the seating surface are provided on the side members 12 and 13 of the seat frame 10.
Is formed. In the present embodiment, bulging portions 14 protruding toward the seating surface side are formed in the side members 12 and 13 of the seat frame 10 at a height near the waist of a seated person. That is, the length of the side members 12, 13 in the thickness direction of the net sheet 1 is increased near the waist. When a portion to which each end of the net body 20 described later is connected to the bulging portion 14 on the back side with respect to the seating surface, the net body 20 is stretched with respect to the seat frame 10 so that the FIG. The vertical direction of the seating surface 8 shown in FIG. 5, that is, a curved surface having a curve in the direction in which the side members 12 and 13 extend.

The seat frame 10 of the present embodiment is
As shown in FIG. 2, the upper end of the seat frame 10 is formed so as to protrude toward the seating surface side because the headrest frame 15 is provided at the upper portion as shown in FIG. Therefore, the seat frame 1
In a portion located near the neck of the human 0, a net coupling portion holding member 17 is provided on the back side of the bulging portion 14.
The net connecting portion holding member 17 is connected to a net connecting portion 2 described later.
4 is a member for stably holding the connecting portion, and in the present embodiment, is formed as an elongated portion extending between the side members 12 and 13. In addition, net support members 18a and 18b for regulating the shape of the back surface of the seating surface are provided on the upper and lower portions of the seat frame 10 as long members extending across both side members 12 and 13, respectively.

As shown in FIG. 3, the net body 20 has a seating surface 8 of the net seat 1 and a tubular net main body portion 22 covering the seating surface 8 from both sides to the back surface. The net main body 22 is formed to have a size equal to or smaller than the completed shape of the net sheet 1, and preferably smaller than the completed shape. That is, each part of the net main body 22 is formed in a cylindrical shape having a circumference smaller than the outer circumference of the net sheet 1 in the completed shape. The net main body 22 of the present embodiment is formed in a shape whose peripheral length gradually increases from the upper portion to the lower side so as to follow the shape of the seat frame 10. As shown in FIGS. 1 and 2, the net main body 22 is formed to have a length capable of covering from the lower part of the headrest part 40 to the lower part of the backrest part 5.

The net main body 22 may be formed by forming a single sheet-like net member into a tubular shape or by woven into a tubular shape. Preferably, as shown in FIG. 3, each surface (a seating surface portion, a back surface portion thereof, and left and right side surface portions)
Each member is formed of a separate member, and is formed into a tubular shape by being attached by sewing or the like. In the present embodiment shown in FIG. 3, the seating surface portion 22a, the left and right side surface portions 22b and 22c, and the back surface portion 22d are each formed of a separate sheet net member, and each side edge is sewn to form a cylindrical shape. ing. Note that, in the net body 20 shown in FIG.
The lower portions of b and 22c have a shape in which a shaft portion 7 (see FIG. 2) for rotatably connecting the backrest portion 5 to the seat portion 3 is cut out.

As shown in FIG. 3, the net main body 22 of this embodiment has net connecting portions 24 and 25 at both open ends of the net main body 22. The net connecting units 24 and 25
As shown in FIG. 5, the seat surface 22a of the net main body 22
And a rear portion 22d. It is preferable that the net connecting portions 24 and 25 are formed so as to connect the seating surface side and the back side in a linear shape as long as possible in the width direction of the net seat 1 as long as the seat frame 10 does not hinder it. Both of the net connection units 24 and 25 may be capable of switching between a connection state and a non-connection state, or one of them may be fixed in a connection state in advance.

The net connecting portions 24 and 25 are formed by sewing, welding,
The seat surface and the back surface may be joined to each other by a joining method such as adhesion, but preferably, the joining member has a joining member. The coupling member is a member having a configuration capable of coupling the seating surface side and the back surface side, and is preferably composed of members forming a pair with each other. For example, it may be a zipper, a snap fastener, a velvet fastener, or a combination of hooks, buttons and buttonholes that engage with each other.

In this embodiment, the net connection units 24 and 25
The upper net connecting portion 24 located on the upper side, that is, on the side of the headrest portion 40, has a zipper 26 as a connecting member.
It has. The zipper 26 is provided along upper edges of the seat surface 22a and the back surface 22d. The zipper 26 is provided so as to be able to connect between the side members 12 and 13 passing through the upper opening of the net main body 22, and is arranged so that openings are formed near both ends. The openings at both ends are formed on both side members 12, 1 of the seat frame 10.
3 is formed.

On the other hand, a lower net connecting portion 25 provided at a lower end of the net main body portion 22 is connected to a relay portion 29 formed on the seating surface side and a hook 27 which can be engaged with each other as a connecting member.
a, 27b. The relay portion 29 is configured such that one connecting member (27a) integrated on the seating surface side and the other connecting member (27b) integrated on the back side are located at the same position across the thickness of the net sheet 1. It is a net-like portion that relays to be arranged. In the present embodiment, the relay portion 29 is formed by extending the lower end of the seating surface portion 22a of the net main body 22 downward. As shown in FIGS. 3 and 5, the hooks 27a and 27b as connecting members are elongate members each having a J-shaped cross section. One hook 27a is attached to an edge of a relay portion 29 integrated with the seat surface 22a, and the other hook 27b is
It is attached to the lower end of the back 22 d of the net main body 22.

In the case where one of the net connecting portions is fixed in a connected state in advance, the net connecting portion 2 at the opening end of the cylindrical portion of the net main body portion 22 on the side of the smaller circumference is used.
4 is fixed in the connected state. The net connecting portion fixed in the connected state in advance can be configured to be connected by sewing, adhesion, welding, or fitting by caulking. Further, the net connecting portion may be a portion in which the seating surface 8 and the back surface thereof are formed of a single sheet-like net member, and the seat-like net member is folded back at the opening end of the net main body 22. . The net body in a form in which one of the net connecting parts is previously joined is formed as a bag-like body as a whole, since one end of the tubular net main body is closed.
It is included in the tubular net body of the present invention. Such a net body 20 can be used for, for example, a seat frame having no headrest skeleton 15 or a seat frame having a headrest skeleton in which a curved upper end portion of the headrest skeleton 15 shown in FIG.

A support member 31 can be provided on the net main body 22. As shown in FIGS. 4 and 5, the support member 31 is a pad member 3 formed in a thin plate shape.
3 is covered with a skin material 35, and the skin material 35 is directly sewn to the net main body 22 to be attached to a predetermined position of the net body 20.

As shown in FIG. 3, the net body 20 can be provided with an inner locking member 37 which can be locked to the seat frame 10 inside the net body 20. The inner locking member 37 is locked by a locking receiving member formed on the seat frame 10 and the seat frame 1 of the net main body 22 is locked.
It is a member that regulates movement with respect to zero. In the present embodiment, the locking receiving member 19 is a rod-shaped member, and is formed on the side members 12, 13 of the seat frame 10 so as to extend in the longitudinal direction of the side members 12, 13 as shown in FIG. The inner locking member 37 has a concave groove through which the locking receiving member 19 can be inserted, and as shown in FIGS.
The net body 20 is attached via a cloth member 39 to a position corresponding to the lock receiving member 19. This inner locking member 37 is attached to the seat frame 10 by the net main body 22.
In the circumferential direction can be restricted.

The net body 20 is attached to the seat frame 10 so as to be stretched, so that the seating surface 8 is
Is composed. In the net body 20, the seat frame 10 formed on the skeleton of the net sheet 1 is passed through the tubular portion of the tubular net main body.

Next, as shown in FIG. 5, the connecting members of the net connecting portions 24 and 25 provided at the open ends of the net main body 22 into which the seat frame 10 is inserted are connected,
The net body 20 is mounted on the seat frame 10 by joining the seating surface side and the rear surface side thereof. Here, the lower net connecting portion 25 covers the end of the seat frame 10, that is, the lower end of the seat frame 1 so as to cover the lower end.
Combined at the lower end of 0. Specifically, the relay portion 29 formed on the seating surface portion 22a side passes below the shaft portion 7 of the seat frame 10 and the J hook 27a, 2
7b are connected. At this time, on both sides of the lower net connecting portion 25 of the net body 20, the cutout portions of the side portions 22b and 22c, the relay portion 29, and the lower net connecting portion 25
An opening is formed by the portion and the lower end portion (shaft portion 7 portion) of the seat frame 10 is inserted.

On the other hand, the upper net connecting portion 24 is connected at an intermediate portion of the seat frame 10. Specifically, the zipper 26 of the upper net joint 24 above the net joint holding member 17 provided on the upper part of the seat frame 10.
Are combined. At this time, openings are formed at both ends of the zipper 26. The side members 12 and 13 of the seat frame 10 are passed through these openings, and the upper end of the seat frame 10 is located above the net body 20. By this step, the net body 20 is connected to the seat frame 1
0 is attached in a state where it is stretched in a completed body shape.
When the net main body 22 is passed through the seat frame 10 and placed at a predetermined position, the inner locking member 37
As shown in FIG.

Also, in the net seat 1 shown in FIG. 1, after the net body 20 is mounted on the seat frame 10, a headrest portion 40 is provided. The headrest section 40
As shown in FIG. 5, a resin headrest base 42 that can be fixedly engaged with the headrest skeleton 15 of the seat frame 10, a pad member 44 that covers the outer surface of the headrest base 42, and a skin material that covers the outer surface of the pad member 44 46
Is provided. The headrest portion 40 is provided by the headrest member 48 being put on the headrest framework 15 of the seat frame 10 and the headrest base 42 being fixed to the headrest framework 15 in an engaged state.

In the net sheet 1 of the present embodiment, the respective portions of the net body 20 having the tubular net main body 22 having elasticity and a natural state shape smaller than the completed shape of the net sheet 1 are connected to each other. Thus, it is stretched and attached to the seat frame 10. Therefore, there are few components for mounting the net body 20,
The net sheet 1 has a simple structure and is lighter. Further, by forming the net main body portion 22 by combining the net members (22a to 22d) formed for each surface, a uniform tension or a desired tension is generated in each part of the seating surface 8, particularly in the vertical direction. Can be done. For this reason, it is possible to suppress the occurrence of wrinkles and slacks in the respective portions of the net main body portion 22 and prevent excessive tension (tension) from being applied, so that the net body 20 can be favorably stretched.

If the virtual outer peripheral length of the portion of the seat frame 10 that is inserted into the cylindrical net body 20 has a shape that increases from one direction to the other, the virtual outer peripheral length of the net body 20 is small. It can be easily mounted on the seat frame 10 by passing it from the side. In other words, when the seat frame 10 is formed in a shape in which the cross-sectional area of the completed body shape that increases from one direction to the other direction increases, the net body 20 is moved from the side where the cross-sectional area of the seat frame 10 is smaller to the larger side. By passing
Work becomes easier.

Side members 12 and 13 of seat frame 10
The swelling portion 14 is provided, and the net joining portions 24 and 25 are joined at a position where the swelling portion 14 does not project toward the seating surface side from the swelling portion 14. Therefore, the vertical tension acting between the net connecting portions 24 and 25, the tension acting in the width direction of the net main body 22, and the net acting between the bulging portion 14 and each of the net connecting portions 24 and 25. The tension in the thickness direction of the sheet 1 is generated. By the combination of the tensions in these three directions, the seating surface 8 near the bulging portion 14 of the net main body 22 is
A central portion can be formed in a concave shape with respect to a side end portion close to 2 and 13. With this configuration, the seating surface 8 of the backrest 5 has a curved surface that is easy to follow the line in the vertical direction, that is, a line from the back to the waist of the occupant, and a line that easily follows the line from the back to the side of the occupant. You. Therefore, in the net seat 1 of the present embodiment, the seating surface 8 of the backrest 5 is easily fitted to the back of the occupant, and a better seating feeling can be obtained.

Further, since the seating surface 8 in the completed body shape of the net seat 1 is formed as a curved surface, the outer peripheral length in the completed body shape becomes larger than the virtual outer peripheral length of the seat frame 10. For this reason, the net body 2 formed smaller than the outer periphery of the net sheet 1 in the completed body shape
The circumference in the natural state of 0 can be formed to a length close to the virtual outer circumference of the seat frame 10. Therefore, it becomes easier to insert the net main body 22 into the seat frame 10 and work can be performed quickly.

Further, the inner locking member 37 is connected to the net 2
0 is fixed to the seat frame 10 to restrict the movement of the net main body 22 in the circumferential direction. For this reason, even if the occupant moves while sitting on the net seat 1, or sits or leaves the seat, and the force is applied to the net body 20, the net body 20 may be displaced with respect to the seat frame 10. Is suppressed. The net body 20 may be formed of individual net members formed in the shape of the seating surface portion 22a, the side surface portions 22b, 22c, and the back surface portion 22d.
0 contributes to the reduction of the displacement. That is, the net body 20 and the seat frame 10 at the correct position fit well, and a larger frictional resistance is generated between the seam allowance at the joint between the respective surface portions and the seat frame 10.
The tension in the circumferential direction of the net main body 22 at the portion where the inner locking member 37 is provided can be finely adjusted by the inner locking member 37. For example, by deforming the side surface portions 22b and 22c to the inside of the net seat 1 by the inner locking member 37, the seat surface 2
The tension applied to 2a can be increased.

In this embodiment, the seat frame 1
0, a net connecting portion holding member 17 is provided, and the upper net connecting portion 24 of the net body 20 is connected to the seat frame 1.
0, the seating surface side and the back surface side of the open end of the cylindrical portion are connected. For this reason, the upper end of the seat frame 10 slightly protrudes toward the seating surface side, but the seating surface 8 near the upper portion follows the shape of the upper portion of the seat frame 10 and is formed in a concave shape. In this manner, by connecting the net connecting portion 24 of the net body 20 at a predetermined intermediate portion of the seat frame 10, it is possible to obtain the seating surface 8 having a desired shape with a good seating feeling.

A support member 31 is provided on the net main body 22 by sewing. For this reason, a new component is not required to attach the support member 31, and the configuration is simple. In addition, the joint between the support member 31 and the net main body 22 is formed smoothly, and the feeling of sitting is hardly impaired.

The net body 20 is a seat frame 1
Since 0 is covered, the seat frame 10 is not visually recognized from the outside, and the appearance is good. In particular, in the present embodiment, the upper net coupling portion 24 is disposed in the headrest portion 40,
A headrest member 48 is placed thereon. Further, the lower net coupling portion 25 is provided in a lower part of the net sheet 1 that is difficult to see and is closed at an end of the net body 20. For this reason, the components for net connection are hardly visually recognized from the outside, and are formed with a good appearance.

[0036] The net sheet according to the present invention has a sheet frame in which a skeleton of a completed net sheet shape is formed, and the net body is formed in a cylindrical shape, and has a circumferential length in a free state that is equal to the aforementioned length. It is formed of a net body with a seating surface stretched, wherein the net seat is formed to be equal to or less than the outer peripheral length of the net seat in the completed body shape, and is fitted so as to be elastically deformable while covering the seat frame. It is a net sheet. A cylindrical net that can be elastically deformed
An extended state can be formed by covering the seat frame in a predetermined extended state. The net seat of the present invention is not only lightly reduced, but also provided with a seating surface having a good curved surface and elasticity. It can also be applied to fixedly provided sheets.

The present invention is not limited to the above embodiment, and it goes without saying that various modifications and changes can be made within the scope of the present invention. The net body may be provided not only on one sheet but on a plurality of net sheets. In this case, the net body may be partially or wholly overlapped, or a different seating feeling may be imparted to each part, for example, different waist parts and near the shoulder part. Alternatively, a net connecting portion for connecting the seating surface portion and the back surface portion thereof may be provided at an intermediate portion of the net body.
In this case, different curved surfaces and angles can be given to the net surfaces between the different net connection parts. For example, in the net sheet of the present embodiment, the net body 20 is extended upward to provide a tubular net portion covering the headrest portion 40 and a net connecting portion joined at the upper end of the headrest frame 15 of the seat frame 10. be able to. By providing a support member provided with a pad in a net portion constituting the headrest portion 40, the headrest member 4
The headrest section 40 can be configured without configuring the 8 separately.

[0038]

According to the present invention, the net body can be stretched over the seat frame with a simpler structure.

[Brief description of the drawings]

FIG. 1 is a perspective view of a vehicle net sheet according to an embodiment of the present invention.

FIG. 2 is a perspective view of a seat frame of the net sheet shown in FIG. 1;

FIG. 3 is a perspective view of a net body of the net sheet shown in FIG. 1;

FIG. 4 is a side sectional view of a back support surface of the net sheet shown in FIG. 1;

FIG. 5 is a cross-sectional view of a back support surface of the net sheet shown in FIG. 1;

FIG. 6 is a perspective view showing a conventional net sheet for a vehicle.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 60 Net seat 3 Seat part 5 Back rest part 7 Shaft part 8 Seating surface 10, 62 Seat frame 12, 13 Side member 14 Swelling part 15 Headrest frame 17 Net connecting part holding member 18a, 18b Net support member 19 Lock Receiving member 20, 66 Net body 22 Net main body 22a Seating surface 22b, 22c Side 22d Back 24, 25 Net coupling 26 Zipper 27 Hook 29 Relay 31 Support member 33 Pad member 35 Skin material 37 Inner locking member 39 Cloth member 40 Headrest part 42 Headrest base part 44 Pad member 46 Skin material 64 Locking piece 68 Wire

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B68G 11/02 B68G 11/02 (72) Inventor Kunio Nishiyama 1 Toyota Town, Toyota City, Aichi Prefecture Toyota Motor Stock F term in the company (reference) 3B084 HA07 3B087 DE10

Claims (5)

[Claims] 1. A net seat having a seating surface constituted by a stretched net body, wherein a seat frame in which a skeleton of a completed body shape of the net sheet is formed has a shape smaller than that of the completed body shape in a free state shape. A net sheet, wherein a small-sized tubular net body is fitted and attached while being elastically deformed. 2. The net sheet according to claim 1, wherein
The net sheet, wherein the seat frame has a configuration in which a virtual outer peripheral length of a portion inserted into the cylindrical net body increases from one direction to another direction. 3. The net seat according to claim 1, wherein the net body has a seating surface side and a back surface side joined at both open ends of a tubular portion. Net sheet. 4. The net seat according to claim 3, wherein the seat frame includes a side member that constitutes both side surfaces of the net sheet and has a bulging portion protruding toward a seating surface. The net seat, wherein the bulging portion is inserted into the net body, and both open ends of the net body are arranged on the back side of the seating surface with respect to the bulging portion. 5. The net seat according to claim 3, wherein at least one of the open ends of the net body has a seating surface side and a rear surface side joined at an intermediate portion of the seat frame. Characteristic net sheet.