JP2002238689A - Vehicle seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate work to be given to a variety of control members stored in a support base in a vehicle seat using a three-dimensional net material. SOLUTION: With a second cushion member or the like stretched on a seat frame 30 through a joining member such as a set plate or the like, a supporting mechanism supporting at least the front of the seat frame 30 separably from an under fame 6 is provided. The supporting mechanism has a plate 621 to be engaged and a projection 330 for engagement. The plate 621 is erected along the longitudinal direction of a long side frame material 62 arranged in the rear of the frame 6, and a through hole 621a made in the width direction with an appropriate clearance. The engagement projection 330 is mounted to a rear end fame material 320 extended astride to the rear of a side frame material 310, and detachably engaged with the through hole 621a of the plate 621.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to an automobile, a railway vehicle,
Vehicle seats, such as aircraft, have a seat mounted on a support that houses a mechanism for controlling the tilting motion of the back (backrest), a rotation control mechanism for controlling rotation in the horizontal direction, and the like. For sheet.

[0002]

2. Description of the Related Art For example, in a seat for a railway vehicle, a frame panel is generally disposed between side frames which are spaced apart in a width direction from a back portion and a seat portion constituting a seat body. A cushion member made of polyurethane foam is attached to the frame panel via a planar fastener. On the other hand, a seat body including such a frame structure and a cushion member includes a leg portion installed on a vehicle floor surface and an underframe arranged rotatably in a horizontal direction with respect to the leg portion. It is supported by a supporting base provided, and has a configuration in which the orientation of the seat body can be changed by rotating the underframe. The internal space of the legs contains a mechanism that controls the tilting movement of the back, a rotation control mechanism that controls the rotation of the underframe in the horizontal direction, etc. These require regular maintenance work etc. There is. In this case, since the cushion member is conventionally merely attached to the frame panel via the fastener, the cushion member can be removed very easily, and required maintenance work can be easily performed.

[0003]

By the way, in recent years, a tertiary light-weight tertiary material which can exhibit high cushioning properties even when thinner than pad materials such as polyurethane foam, has a large number of voids, is excellent in air permeability, and is lightweight. A net material having an original structure is known as a cushion member. The net material of the three-dimensional structure is formed by connecting a pair of ground knitted fabrics spaced apart from each other with a connecting yarn, preferably with a thick connecting yarn of 200 denier or more in order to increase rigidity over ordinary yarn. It has a three-dimensional structure and is an elastic structure that is resistant to sagging, and is excellent in air permeability, body pressure dispersion characteristics, shock absorption characteristics, and the like. However, the three-dimensionally structured net material cannot maintain the supporting shape for supporting the occupant's body by itself, unlike polyurethane foam. Therefore, as the frame structure, it is necessary to adopt a structure in which the shape of the net material becomes a predetermined shape for supporting the human body when the net material is stretched. It is necessary to engage the structure with an arbitrary fastening member so that the structure is not easily dislodged by the tension at the time of sitting or the like. However,
When various control members and the like are accommodated in the support base, the three-dimensional structure net material stretched in this manner is required to engage with the fastening member each time when adjusting them. It must be released and the net material must be removed, making maintenance work and the like cumbersome.

The present invention has been made in view of the above points, and in a vehicle seat using a three-dimensionally structured net material as a cushion member, an operation to be performed on various control members and the like accommodated in a support base. It is an object to make it easy to perform.

[0005]

In order to solve the above-mentioned problems, according to the present invention, a seat mounted on a support table in which various control members such as a tilt control member for a back portion are accommodated. A three-dimensional seat formed by joining a pair of ground knitted fabrics, which are stretched to a seat frame and separated from each other, with a connecting thread, the seat being provided with It is configured with a cushion member made of a net material having a structure, and at least a front portion of the frame for the seat portion, with the cushion member made of a net material having a three-dimensional structure attached to the support base. A vehicle seat having a support mechanism for supporting the vehicle seat in a detachable manner. According to the second aspect of the present invention,
The support mechanism includes an engagement portion provided at a rear portion of the seat frame, and an engaged portion attached to a rear portion of the support base and detachably engaged with the engagement portion. The vehicle seat according to claim 1, wherein the vehicle seat is configured by: According to the third aspect of the present invention, the support mechanism is connected to a fixed portion provided at a rear portion of the support base and a rear portion of the seat frame, and is rotatably engaged with the fixed portion. The vehicle seat according to claim 1, wherein the vehicle seat is configured to include: According to the fourth aspect of the present invention, a lock mechanism that regulates a separating operation of the seat frame from the support base is provided at a front portion of the seat frame and the support base. A vehicle seat according to any one of Items 1 to 3, is provided.

(Operation) In the vehicle seat according to the first aspect, at least the front portion of the seat frame is detachable from the support table in a state where the cushion member made of the three-dimensionally structured net material is mounted. Since the supporting mechanism is provided, the operation of separating the seat frame from the support base can easily perform maintenance work and the like of various control members housed in the support base. Claim 2
In the vehicle seat described above, the seat frame can be separated from the support base by detaching the engaging portion from the engaged portion. In the vehicle seat according to the third aspect, since the support mechanism has the rotating portion rotatable with respect to the fixed portion, the front frame is lifted to separate the seat frame from the support table. Can be. In the vehicle seat according to the fourth aspect, since the seat frame and the support are locked by the lock mechanism, the seat frame may be separated from the support unless the lock mechanism is released. In addition, it is possible to prevent the seat frame from being erroneously separated from the support table at the time of sitting or the like.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail based on embodiments shown in the drawings. 1 to 10
BRIEF DESCRIPTION OF THE DRAWINGS It is a figure for demonstrating the vehicle seat 1 concerning one Embodiment of this invention, Comprising: This vehicle seat 1 is comprised including the back part 2 and the seat part 3. In the present embodiment, the present invention is applied to a three-seat seat for a railway vehicle. As shown in FIG. 7, three sets of frame structures 10 for forming the vehicle seat 1 are used. Both are supported by a common underframe 6.

The underframe 6 together with legs (not shown) fixed on the floor of the vehicle constitute a support base for supporting the frame structure 10. Specifically, as shown in FIG. 7, the underframe 6 includes two long-side frame members 61 and 62 that are spaced apart in the front-rear direction and the two long-side frame members. 6
It is formed in a substantially rectangular shape by the short side frame members 63 and 64 which are bridged between the opposed ends of the first and the second.
It is rotatable horizontally with respect to the legs. A control member for controlling the rotation operation and the like is accommodated in the legs, and the underframe 6 is moved by operating a pedal provided on the side of the legs connected via a cable (not shown). 1
It is provided so that it can be rotated by 80 degrees to change the orientation of the seat. Note that a control member for controlling the tilting operation of the back portion 2 with respect to the seat portion 3 is also accommodated in the leg portion, and is operated by operating an operation member provided at a distal end portion or the like of the armrest connected via a cable. , The back part 2 can be moved back and forth.

Each of the frame structures 10 is shown in FIG.
As shown in FIG. 3, the back frame 20 for forming the back 2 and the seat frame 30 for forming the seat 3 are provided. The back frame 20
It comprises a thin frame panel 210 and side frame members 220, 220 arranged substantially parallel to each other. The side frame members 220 and 220 are configured to include main side frame members 221 and 221, first shaped frame members 222 and 222, and second shaped frame members 223 and 223, respectively.

As shown in FIGS. 2 and 3, the frame panel 210 has projecting pieces 211 and 211 formed by bending the vicinity of each side edge forward over a predetermined width.
The main side frame members 221 and 221 are fixed to the protruding pieces 211 and 211.

At the lower part of the main side frame members 221 and 221, as shown in FIGS. 2 and 3, a mounting hole 2 for mounting a support shaft 65 for supporting the tilting operation of the back portion 2 is provided.
21a is provided. The support shaft 65 is supported by an armrest mounting frame (not shown) protruding from the underframe 6. Also, as shown in FIG. 3, one of the lower ends of the main side frame members 221 and 221 is provided with an extension frame portion 221 that extends below the other.
b is provided, and this extension frame portion 221b is
A structure in which the tilting range of the back part 2 is controlled by being supported by an armrest mounting frame provided on the underframe 6 and abutting on a tilting range restricting frame 66 shown below the support shaft 65 in FIG. It has become.

The above main side frame members 221 and 221
Along with 21, the first shape forming frame members 222 constituting the side frame members 220 are provided at positions corresponding to both sides from the thoracic vertebra to the lumbar vertebra of the seated person such that the intermediate portion swells forward. Can be As a result, the cushion member made of the three-dimensionally structured net material provided at a position corresponding to the lumbar vertebra from the thoracic vertebra of the seated person is stretched between the first shape forming frame materials 222, 222, thereby forming the main side frame. As compared with the case where the members are directly stretched between the members 221 and 221, both sides protrude forward, so that the holding property at the relevant portion can be improved, and the suppressing force of the sway due to the vibration input can be increased.

In order to improve the riding comfort of the seated person in the sitting position, it is important to suppress the sway from the thoracic vertebra to the lumbar vertebra and the sway from the cervical vertebra to the head as described above. For this reason, the side frame members 220, 220 of the present embodiment form a mechanism for suppressing such sway, so that the second shape forming frame members 22 are located at positions corresponding to both sides from the cervical vertebra to the head of the seated person.
3,223 are provided. As a result, the cushion member 40 made of a three-dimensionally structured net member stretched between the second shape forming frame members 223 and 223 is a portion corresponding to the vicinity of supporting the thoracic vertebra stretched below the portion. Of the cushion members made of a net material having a three-dimensional structure, which bulges further forward than the second shape forming frame materials 223, 22
The part (headrest part) where the head comes into contact with the cervical vertebra stretched between the three vertebrae has a large sinking stroke due to the load.

As shown in FIGS. 2 and 3, the seat frame 30 is provided with side frame members 310, 310 which are spaced apart in the width direction. Each of the side frame members 310, 310 has a substantially horizontal portion 311, 311;
It has substantially vertical portions 312 and 312 formed by bending downward from one end of the substantially horizontal portions 311 and 311, and is disposed with the substantially vertical portions 312 and 312 positioned forward.

A substantially vertical portion 3 is provided between the side frame members 310, 310 constituting the seat frame 30 and the underframe 6.
A vertical auxiliary frame member 3 substantially parallel to
14, 314 are provided, and the vertical auxiliary frame material 3 is provided.
14 and 314, the lateral auxiliary frame member 31 arranged in a positional relationship substantially parallel to the substantially horizontal portions 311 and 311.
5,315 are each supported by welding.

Two front end auxiliary frame members 316 and 317 are arranged between the lower ends of the substantially vertical portions 312 and 312 on the radially near side and the inner side of each lower end. The front end auxiliary frame members 316 and 317 maintain the arrangement interval of the substantially vertical portions 312 and 312, form the shape of the seat frame 30, and engage and connect a front edge portion of a second cushion member 50 described later. Function as a part to be engaged.

As shown in FIGS. 2 and 4, a first cushion member 40 is stretched between the side frame members 220 constituting the back frame 20. Specifically, in order from the top, between the second shape forming frame members 223 and 223, the main side frame member 22
1, 221 between the middle portions and the first shape forming frame material 2
It is stretched between 22 and 222 using an arbitrary fastening member.
The type of the fastening member is not limited as long as it can be detachably engaged with each frame member. Of course, it is preferable to use a member whose engagement state is not easily released by a load.

In the present embodiment, the engaging frame plate 22 extends along the outer surfaces of the main side frame members 221 and 221.
4 and 224 are fixedly arranged, and as a fastening member, as shown in FIG.
4, plate members (hereinafter, set plates) 42, 42 made of synthetic resin and having a substantially U-shaped cross section are used.

On the other hand, as shown in FIGS. 2 and 5, a second cushion member 50 is stretched between the side frame members 310 of the seat frame 30. The second cushion member 50 is composed of the net material 100 having a three-dimensional structure, similarly to the first cushion member 40, and has a very low elongation of preferably less than 5%, and a substantially central portion sinks more than the vicinity of the side edge. It is stretched in a substantially concave shape. In particular,
Each side 51, 51 of the second cushion member 50 is shown in FIG.
As shown in (1), it is folded downward, and to the folded portion, canvases 53, 53 are connected by suturing means. Then, the folded side portions 51, 51
Is positioned inside the substantially horizontal portions 311, 311, and the canvases 53, 53 are positioned outside the substantially horizontal portions 311, 311, and connected to the lower ends of the canvases 53, 53 by means such as sewing. Are engaged with the horizontal auxiliary frame members 315 and 315 which are substantially parallel to the substantially horizontal portions 311 and 311.

The leading edge 52 of the second cushion member 50
Are side frame members 310, 3 as shown in FIG.
After hanging down so as to cover the substantially vertical portions 312 and 312 of the ten, among the two front end auxiliary frame members 316 and 317 disposed between the lower ends of the substantially vertical portions 312 and 312,
Fastening of a set plate or the like connected to the front end auxiliary frame member 317 disposed on the rear side through a lower side of the front end auxiliary frame member 316 disposed on the front side by means of sewing or the like to the end of the front edge portion 52. It is engaged via a member (not shown).

In FIGS. 2 and 5, reference numeral 55 denotes a second
Is a support spring member laminated on the back surface of the front edge portion 52 of the cushion member 50 of FIG. The support spring member 55 urges in a direction substantially perpendicular to the contact surface with the seated person, acts as a restoring force against load deformation, and gives a soft spring feeling and a large stroke feeling. Further, reference numeral 60 is arranged at a slight interval on the back side of the second cushion member 50, is stretched at a higher elongation rate than the second cushion member 50, and extends from the thigh when seated to the buttocks. It is a base cushion member that has an effect of increasing the feeling of stroke or thickness below and reducing the feeling of contact with the frame material and the like, and is made of a three-dimensionally structured net material 100 like the second cushion member 50. You.

Here, the structure of the net material 100 having a three-dimensional structure constituting the cushion members 40 and 50 is shown in FIG.
17 will be described. As shown in FIG. 14, the net material 100 includes a pair of ground knitted fabrics 110 and 120 spaced apart from each other, and the pair of ground knitted fabrics 11.
Numerous connecting yarns 1 that reciprocate between 0 and 120 and join them
30 is formed.

As shown in FIG. 15, for example, as shown in FIG. 15, the ground knitted fabric 110 has a flat knitted fabric structure (a fine knitted fabric) which is continuous from a single fiber twisted yarn in both the wale direction and the course direction. ). On the other hand, the other ground knitted fabric 120 has a honeycomb (hexagonal) mesh made of a single fiber twisted yarn, for example, as shown in FIG.
It is formed in a larger stitch structure. of course,
This knitted fabric structure is merely an example, and a knitted fabric structure other than a fine structure or a honeycomb shape may be employed. Connecting thread 1
Reference numeral 30 denotes a three-dimensional mesh knit that is woven between the pair of ground knitted fabrics 110 and 120 so that one ground knitted fabric 110 and the other ground knitted fabric 120 maintain a predetermined interval. The net member 100 is given a predetermined rigidity.

The thickness and the like of the ground yarn forming the ground knitted fabrics 110 and 120 are not particularly limited, and the waist strength required for the three-dimensional knitted fabric can be provided, and the knitting operation is difficult. Is selected. Although a monofilament yarn can be used as the ground yarn, it is preferable to use a multifilament yarn or a spun yarn from the viewpoint of the feeling and the softness of the surface feel.

It is preferable to use a monofilament yarn as the connecting yarn 130, and the thickness is 200 denier or more.
Preferably, 380 denier or more is suitable. This is because a multifilament yarn cannot provide good cushioning properties with a restoring force, and if the thickness is less than 200 denier, it is difficult to obtain a stiffness. That is, by employing a monofilament yarn of 200 denier or more as the connecting yarn 130, the load of the occupant can be reduced by the deformation of the stitches forming the ground knitted fabrics 110 and 120 and the connecting yarn 13
0 can be supported by the restoring force of the adjacent connecting thread 130 that imparts a spring property to the falling and buckling characteristics, and the buckling characteristics, ie, can be supported by the buckling characteristics having a restoring force; A flexible structure having a soft spring characteristic and free from stress concentration can be obtained.

The material of the ground yarn or connecting yarn 130 is not particularly limited. For example, synthetic fibers such as polypropylene, polyester, polyamide, polyacrylonitrile, rayon and the like, regenerated fibers, natural fibers such as wool, silk, cotton, etc. Fiber. The above-mentioned materials may be used alone, or may be used arbitrarily in combination. Preferably, thermoplastic polyester resins such as polyethylene terephthalate (PET) and polybutylene terephthalate (PBT), polyamide resins such as nylon 6, nylon 66, and polyolefin resins such as polyethylene and polypropylene. Or a mixture of two or more of these resins.
In addition, polyester resin is excellent in recyclability and is suitable. Further, the shape of the ground yarn or the connecting yarn 130 is not limited, and may be a round cross-section yarn or a modified cross-section yarn. For reference, the following table shows an example of physical properties of the net material 100 having the three-dimensional structure.

[0027]

[Table 1]

How to arrange the connecting yarns 130 (pile structure)
When the connecting yarn 130 connecting the ground knitted fabrics 110 and 120 is viewed from the side, more specifically, the connecting yarn 130 is classified into, for example, the type shown in FIG.
(A), (b) is a straight type in which the connecting yarn 130 is woven almost vertically between the ground knitted fabrics 110, 120, and (a) is a straight type knitted in a figure eight shape. b) is a simple straight knit. (C) to (e) show the ground knitted fabrics 110 and 120.
Between them, a cross type in which the connecting yarns 130 are knitted so as to intersect halfway, of which (c) is a knitted figure of eight, (d) is a knitted simple cloth,
(E) is a cross (double cross) of two lines at a time. In addition, as shown in (c) to (e),
When the connecting yarns 130 are arranged obliquely with the connecting yarns 130 intersecting with each other, compared with a configuration in which the connecting yarns 130 are arranged almost vertically between the ground knitted fabrics 110 and 120 (see (a) and (b)), While maintaining a sufficient restoring force due to the buckling strength of the connecting yarn 130, a soft spring characteristic having a large compression ratio can be provided.

On the other hand, the first cushion member 40
As shown in FIG. 6, the rear end 50a of the second cushion member 50 is laminated on the lower end 40a of the second cushion member 50, and is integrated by being joined to each other by means of suturing means or vibration welding means. Also, the rear end 5 of the second cushion member 50
0a, an intermediate portion excluding the vicinity of both sides in the width direction projects rearward, and an arbitrary fastening member 68 such as a ring member is used for a frame member 67 provided on the underframe 6 behind the seat portion 3. Are linked. This prevents the cushion members 40, 50 from floating near the boundary between the back part 2 and the seat part 3, and allows the cushion members 40, 50 made of a three-dimensional net material to sufficiently exhibit the cushioning performance. it can. The first cushion member 40 and the second cushion member 50 do not necessarily need to be integrated, but because they are integrated, the ability to follow a sitting posture is improved and the feeling of fitting to a seated person is improved.

As shown in FIGS. 1 and 2, in the present embodiment, the first cushion member 40 arranged on the back frame 20 is covered with a back skin material 70, and is attached to the seat frame 30. Second cushion member 5 to be arranged
Numeral 0 is covered with a seating skin material 80. The back skin material 70 and the seat skin material 80 are provided in consideration of the sensation of contact of the occupant, and are made of woven fabric or knitted fabric with a brushed contact surface or a mesh with air permeability. Alternatively, natural leather or synthetic leather can be used. Further, a net material having a three-dimensional structure with a small thickness using a relatively thin connecting yarn can also be used. In addition, depending on the stitch structure etc. of the above-mentioned 1st cushion member 40 and 2nd cushion member 50, without using back skin material 70 and seat skin material 80, it is used as a skin material. You can also.

As described above, the vehicle seat 1 of the present embodiment has a three-dimensional net material 1 as a cushion member.
00, which is stretched over the back frame 20 and the seat frame 30, so that the occupant's holdability is enhanced to suppress vibration in the left-right direction. The excellent ride comfort of the net member 100 having the structure can be achieved.

However, the three-dimensional net material 10
As shown in FIG. 5, the second cushion member 50 composed of the lateral auxiliary frame members 315 and 315 is provided on the seat frame 30 by the set plate 54.
The front edge portion 52 is engaged with the front end auxiliary frame member 317 via a mounting member such as a set plate (not shown). Further, in the present embodiment, the seat cover member 80 is also engaged with the lateral auxiliary frame members 315 and 315 via the set plate 80a. Further, the rear end portion 50a of the second cushion member 50 is configured as shown in FIG.
As shown in the figure, the frame member 67 is connected to a frame member 67 provided on the underframe 6 by using a fastening member 68.

Therefore, assuming that the seat frame 30 is not provided so as to be separated from the underframe 6 constituting the support table, each set member is used for maintenance work of various control members housed in the legs. Plate 54, 80a
Must be removed. In the present embodiment, in order to eliminate such inconvenience, the seat frame 3
0, the second cushion member 50 and the skin material 80 for the seat portion
A support mechanism is provided to support at least the front portion of the seat frame 30 so that it can be separated from the underframe 6 in a state where is stretched via fastening members such as the set plates 54 and 80a. In the present embodiment, the structure shown in FIGS. 3, 8 and 9 is used.

The support mechanism shown in FIG. 3, FIG. 8 and FIG.
It is configured to include an engaged plate 621 forming an engaged portion and an engaging projection 330 forming an engaging portion. The to-be-engaged plate 621 is erected along the longitudinal direction of the long-side frame member 62 disposed at the rear portion of the underframe 6, and a through hole penetrated in the thickness direction at an appropriate interval. 621a. Engagement protrusion 3
Reference numeral 30 denotes a side frame member 310 which is formed by processing a rod-like member into a substantially U-shape and constitutes the seat frame 30.
Are welded at appropriate intervals to the rear end frame member 320 provided between the rear lower surfaces of the substantially horizontal portions 311 and 311, and the closed portion side is connected to the engaged plate 621 from the rear end frame member 320. It is provided so as to project toward it.

Each through-hole 621a formed in the engaged plate 621 and each of the engaging projections 330 are provided so as to correspond to the respective arrangement positions.
21a is formed such that the vertical opening interval is greater than the vertical thickness of each engaging projection 330.

On the other hand, the seat frame 30 and the underframe 6 are provided with a lock mechanism 90 for regulating the separating operation of the seat frame 30 from the underframe 6. The lock mechanism 90 includes a locked member 91 and a lock member 92. The locked member 91 of the present embodiment is formed by processing a rod-like member into a substantially U-shape, and the front end of the seat frame 30. The auxiliary frame members 316 and 317 are fixed near the respective sides. As shown in FIG. 10, the lock member 92 is formed in a substantially elliptical shape in plan view, and has an upper plate portion 922 having a lock hole 921 formed of a long hole formed in a substantially central portion. A lower plate portion 923 disposed with a gap from the portion 922; an upper plate portion 922 and a lower plate portion 923;
Lever 924 inserted into the gap between the upper plate portion 922 and the lower plate portion 923.
The locking hole 92 is normally provided by an elastic member 925 which is provided at the tip of
1 and an engaging body 926 protruding into the inside. As shown in FIGS. 3, 8 and 9, in the front edge support panel 611 fixed to the long side frame member 61 located at the front part of the underframe 6, It is mounted in the corresponding position.

According to the vehicle seat 1 of the present embodiment, during normal use, the engaging projections 330 constituting the support mechanism are provided with the respective through holes 621 of the engaged plate 621.
a and the locked member 9 provided on the front end auxiliary frame members 316 and 317 of the seat frame 30.
1 is inserted into the locking hole 921 of the locking member 92, and the engaging member 92 is inserted into the substantially U-shaped groove of the locked member 91.
6 is projected by the elastic member 925 and is in a locked state. Therefore, in such a state, the seat frame 3
0, the seat frame 30 remains on the underframe 6
The vehicle seat of the present embodiment can be used stably without being separated from the vehicle seat.

On the other hand, when performing maintenance work or the like of various control members provided in the legs supporting the underframe 6, first, the lock mechanism is released. Specifically, the lever 924 is pulled in the release direction in FIG. 10 against the elastic force of the elastic member 925, and the engaging body 926 is moved to the locked member 91.
From the substantially U-shaped groove. Next, while maintaining this state, the front part of the seat frame 30 is lifted as shown in FIGS. As described above, the vertical gap between the through holes 621a formed in the engaged plate 621 is larger than the vertical thickness of each of the engaging projections 330, and has a play, which corresponds to this play. The front part of the seat frame 30 can be lifted by an appropriate amount. When the front portion of the seat frame 30 is lifted, the seat frame 30 is pulled away from the back frame 20, and the engaging projections 330 are disengaged from the through holes 621a. As a result, in the present embodiment, the seat frame 30 is entirely separated from the underframe 6. Thereafter, the seat frame 30 is held by, for example, leaning against the back frame 20 side, and maintenance work of various control members arranged in the legs via the underframe 6 is performed.

According to the present embodiment, the seat frame 30 can be separated from the underframe 6 only by the above-described operation. In performing the above-described operation, the second cushion member 50 and the seat skin material are used. There is no need to remove 80. Therefore, since the second cushion member 50 and the like are made of the three-dimensionally structured net member 100, the second cushion member 50 and the like are attached to the seat frame 30 by a fastening member such as a set plate. In addition, work to be performed on various control members and the like disposed in the legs can be quickly and easily performed.

The vehicle seat of the present invention is not limited to the above-described embodiment. For example, a structure as shown in FIG. 11 can be adopted as a support mechanism. The support mechanism shown in FIG. 11 is provided with, for example, two mounting pieces 622 at a predetermined interval in the longitudinal direction on the long side frame member 62 disposed at the rear portion of the underframe 6. Each of 622 includes an engaged portion having a structure in which a pin 623 is protruded, and an engaging portion including a holding member 340 provided at each rear portion of the substantially horizontal portions 311 and 311 of the seat frame 30. Be composed. The sandwiching member 340 includes a pair of upper and lower sandwiching plates 341 and 342 whose base ends 341a and 342a are fixed to the substantially horizontal portions 311 and 311. 341b, 342b, and the pin 623 is sandwiched between the bulging portions 341b, 342b. The portions adjacent to the bulging portions 341b and 342b are formed so that the distance between the opposing pins 623 is smaller than the outer diameter of the pin 623. It has expansion piece parts 341c and 342c extending in the direction.

That is, when the seat frame 30 is pushed in after the gap between the expanding pieces 341c and 342c is brought into contact with the outer surface of the pin 623, a portion having a narrow opposing space adjacent to the bulging parts 341b and 342b. When the pin 623 passes through, the elasticity of the sandwiching plates 341 and 342 pushes and spreads them, and by passing through the portion, the pin 623 is sandwiched between the facing bulging portions 341b and 342b,
By pulling the seat frame 30 forward, on the contrary, the pin 623 pushes and spreads the space between the narrow portions facing each other adjacent to the bulging portions 341b and 342b, and the pinching member 340 and the pin 623 is released. Of course, when the seat frame 30 is detached, the locked state of the lock mechanism 90 provided on the front portion of the seat frame 30 and the underframe 6 is released in advance, as in the above embodiment, and the seat frame is provided with elasticity. Holding plate 34
1 and 342, the pin 623 engaged between the bulging portions 341b and 342b is lifted upward around the pin 623, and then pulled toward the user.

In the case of the support mechanism shown in FIG. 11, the seat frame 30 can be separated from the underframe 6 simply by releasing the engagement between the pinching member 340 and the pin 623. it can. For this reason, work to be performed on various control members and the like accommodated in the legs can be performed without removing the cushion member 50 and the like made of the three-dimensionally structured net material 100.

Further, as shown in FIG.
Instead of the above-described holding member 340 as an engaging portion, the rear portion of the substantially horizontal portions 311 and 311 has a width substantially the same as the diameter of the pin 623, and once downward from the upper edge,
It is also possible to attach an engagement plate member 350 provided with a series of cutouts 351 which are cut out substantially horizontally toward the front and further have a central groove 351a cut down. According to this engagement plate member 350, the seat frame 30 is held in a posture in which the front portion is positioned obliquely upward, and the opening portion 35 formed in the upper end edge is held.
1b is opposed to the pin 623, the pin 623 is operated to move along the notch 351, and the front portion of the seat frame 30 is pushed down to the normal posture, so that the pin 623 is inserted into the central groove 351a. Is located (see FIG. 12A). Then, lift the front portion of the seat frame 30,
By operating the pin 623 to move in the opposite direction along the notch 351 and detaching the pin 623 from the opening 351 b to the outside, the seat frame 30 can be separated from the underframe 6. . Therefore, even in such an embodiment, it is not necessary to remove the second cushion member 50 and the like when performing the operation of releasing the engagement state between the engagement plate member 350 and the pin 623.

Each of the above-described support mechanisms has a structure in which the seat frame 30 can be separated from the underframe 6 not only at its front part but also at its rear part. Alternatively, the front portion of the seat frame 30 may be lifted upward to perform a necessary operation for various control members provided in the legs. For example, as shown in FIG. 13, a fixing portion including two mounting pieces 630 is provided at a long side frame member 62 provided at the rear portion of the underframe 6 at a predetermined interval in the longitudinal direction. The side frame member 31 is provided with a rotating portion including a rotating frame 360 having a bearing hole 361 rotatably supported via a support shaft 631 with respect to the mounting piece 630.
0, 310 may be connected to the rear portions of the substantially horizontal portions 311, 311. In addition, the rotating frame 360 constituting the rotating portion may be provided not as a separate member from the substantially horizontal portion 311 but as an integral member.

According to the support mechanism shown in FIG. 13, after the lock mechanism is released, only by lifting the front portion of the frame 30 for the seat portion, the rotating frame 36 around the support shaft 631 can be used.
Since the side frame member 310 connected to the pivot member 0 rotates, without removing the second cushion member 50 and the like,
A sufficient work space can be ensured between the underframe 6 and the various control members for performing necessary operations.

Further, in the present invention, the lock mechanism 9
0 is also not limited to the one shown in FIG.
Any structure may be used as long as it is a mechanism that can reliably maintain the connected state between the front portion of the seat frame 30 and the underframe 6 during normal use. Further, in the above description, the present invention is described by taking a seat for a railway vehicle as an example, but a seat for an aircraft or an automobile is also described with respect to various control members disposed in their support bases. Needless to say, the present invention can be applied to facilitate maintenance work and the like.

[0047]

According to the vehicle seat of the present invention, at least the front portion of the seat frame is supported so that it can be separated from the support table with the cushion member made of a three-dimensional net material attached. Has a mechanism. Therefore, by performing the operation of separating the seat frame from the support table, various operations to be performed on various control members housed in the support table can be easily performed.

[Brief description of the drawings]

FIG. 1 is an external perspective view showing a vehicle seat according to one embodiment of the present invention.

FIG. 2 is a partially sectional perspective view showing the entire structure of the vehicle seat according to the embodiment.

FIG. 3 is a perspective view showing a frame structure of a vehicle seat according to the embodiment.

FIG. 4 is a sectional view taken along the line BB of FIG. 1;

FIG. 5 is an end view cut along the line AA of FIG. 1;

FIG. 6 is a sectional end view taken along line CC of FIG. 1;

FIG. 7 is a perspective view showing a frame structure in a case where three sets of frame structures are arranged on a common underframe to form a seat for three people.

FIG. 8 is a diagram for explaining a support mechanism and a lock mechanism of the seat frame, showing a state in which the seat frame is locked to the underframe;

FIG. 9 is a view for explaining a support mechanism and a lock mechanism of the seat frame, showing a state in which the lock of the seat frame is released.

FIG. 10 is a perspective view for explaining the structure of a lock mechanism.

FIGS. 11A and 11B are diagrams showing another embodiment of the support mechanism.

FIGS. 12A and 12B are diagrams showing still another embodiment of the support mechanism.

FIG. 13 is a view showing still another embodiment of the support mechanism.

FIG. 14 is a cross-sectional view showing a part of a net material having a three-dimensional structure used in each of the embodiments.

FIG. 15 is an enlarged view showing one ground knitted fabric of the net material shown in FIG. 14;

FIG. 16 is an enlarged view showing the other ground knitted fabric of the net material shown in FIG. 9;

FIGS. 17 (a) to 17 (e) are diagrams for explaining how to arrange connecting yarns.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vehicle seat 2 Back part 3 Seat part 6 Underframe 621 Engagement plate 621a Through hole 622 Mounting piece 623 Pin 630 Mounting piece 631 Support shaft 10 Frame structure 20 Back frame 210 Frame panel 220 Side frame material 221 Main side frame Material 222 First Shaped Frame Material 223 Second Shaped Frame Material 30 Seat Frame 310 Side Frame Material 330 Engagement Projection 340 Nipping Member 350 Engagement Plate Member 360 Rotation Frame 40 First Cushion Member 50 Second cushion member 70 Back skin material 80 Seat skin material 90 Lock mechanism 91 Locked member 92 Lock member 100 Three-dimensional net material

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) // D04B 1/00 D04B 1/00 B 21/14 21/14 Z (72) Inventor Yoshitaka Morishita Aichi 1-4-1 Meiji Station, Nakamura-ku, Nagoya-shi Tokai Passenger Railway Co., Ltd. (72) Inventor Etsunori Fujita 1-2-10 Yano Shinmachi, Aki-ku, Hiroshima-shi, Hiroshima Delta Touring Co., Ltd. Kazumi Higashi 1-2-10 Yano Shinmachi, Aki-ku, Hiroshima City, Hiroshima Prefecture Inside the Delta Touring Co., Ltd. (72) Inventor Yumi Ogura 1-2-10 Yano Shinmachi, Aki-ku, Hiroshima City, Hiroshima Hiroshima Prefecture Inventor Katsumi Tashiro 100, Maeda-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture F-term in Koito Industry Co., Ltd. 3B087 AA08 DA09 DA10 DB03 DE02 DE03 3B096 AD04 AD 07 BA02 4L002 AA06 AA07 BB01 BB03 CB01 CB02 EA02 FA06

Claims (4)

[Claims] 1. A vehicle seat having a seat installed on a support table in which various control members such as a tilt control member for a back are accommodated, wherein the seat is attached to a frame for the seat. And a cushion member made of a net material having a three-dimensional structure formed by joining a pair of ground knitted fabrics that are arranged apart from each other with a connecting yarn, and the seat portion. A vehicle seat having a support mechanism for supporting at least the front part of the frame for use with a cushion member made of a three-dimensionally structured net material in a detachable manner with respect to the support table. . 2. An engaging portion provided at a rear portion of the frame for the seat portion and an engaged portion attached to a rear portion of the support base and detachably engaged with the engaging portion. 2. A structure comprising a joining portion.
Vehicle seat as described. 3. A rotating part, wherein the supporting mechanism is connected to a fixed part provided at a rear part of the support base and a rear part of the seat frame, and is rotatably engaged with the fixed part. The vehicle seat according to claim 1, further comprising: 4. The seat frame according to claim 1, further comprising: a lock mechanism for restricting an operation of separating the seat frame from the support table. A vehicle seat according to any one of the preceding claims.