JP2002238694A - Sheet for rolling stock or air craft - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the holding property of a back and attempt to improve riding quality by controlling vibration in right and left directions. SOLUTION: A frame 20 for the back comprises a frame panel 210 and a side frame material 220 placed in such a way that the front end edge is situated in the forward direction separated by a predetermined interval for each side portion of the frame panel 210 and has a structure that a cushion member 40 comprising a net material of a three-dimensional structure is placed in a stretching manner in a frame 20 for the back by protruding both the side parts ahead of an approximately central portion at a part at least corresponding to the thoracic vertebrae to a lumber vertebra. Therefore, at the time of the seating, the side portion of the cushion member 40 greatly projects to the forward direction and the holding property of the back can be improved while much the same size as in the case where the cushion member is formed of a conventional urethane foam and it is possible to attempt to improve riding quality by controlling vibration in right and left directions.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a back (back).
The present invention relates to a railcar or aircraft seat in which another seat is arranged rearward and is used in a form of a plurality of rows.

[0002]

2. Description of the Related Art As shown in FIGS. 22 to 24, for example, the structure of a back frame 900 of a seat for a railway vehicle or an aircraft is composed of two side frame members 901 and 902 arranged substantially in parallel. And these side frame materials 901, 9
02, an upper frame member 903 that is bridged between the upper ends of
A frame panel 904 is provided so as to extend between the front edges of the side frame members 901 and 902. On the front surface of the frame panel 904, a planar fastener 905 is attached at a predetermined position. The cushion member 906 is covered with a skin material (surface cloth) 907 and then a fastener (not shown) attached to the surface of the skin material 907 is connected to the fastener 905 attached to the frame panel 904. It is arranged by combining.

[0003] As the cushion member 906, polyurethane foam is generally used. For example, in the back portion, the vicinity of both sides bulges forward, and the shoulder portion has a predetermined thickness and shape. By forming the abutment part (headrest part) of the head located above it near the contact part as a border, it also swells slightly forward,
It is formed so that the surface near the center is located relatively rearward.

[0004]

However, when the polyurethane foam used as the cushion member exhibits a predetermined cushioning property without giving a feeling of foreign matter to each of the above-mentioned frames, the polyurethane foam has a considerable effect. It must have a thickness. For this reason, as described above, even though the surface near the center is located relatively rearward relative to both sides,
The surface near the center of the front edges of the side frame members 901 and 902 is naturally located forward by a distance corresponding to its thickness. In order to increase the feeling of holding the back more than before and suppress vibration in the left and right directions and obtain a more comfortable sitting comfort (ride comfort), it is necessary to increase the relative degree of swelling forward near both sides However, in view of the cushioning performance of polyurethane foam, there is also a limit to reducing the thickness near the center, and under such conditions, when the degree of swelling forward near both sides is increased, The space between the vicinity of the seat and another seat (front seat) arranged in front of the seat is narrowed, and the gap between the front and rear seats (the part located at the rearmost end of the front seat and the frontmost end of the rear seat) It becomes inconvenient for people to enter and exit through the gap between the parts. If the gap between the front and rear sheets is to be secured as in the related art after increasing the degree of bulging forward near both sides, the sheet 1
The occupied area per vehicle increases. Further, as the thickness of the polyurethane foam increases, the sheet weight also increases.

When a polyurethane foam is used, the structure is such that the polyurethane foam is directly attached to the frame panel via the above-mentioned fastener. Therefore, when any part of the rear seat, such as a leg of a seated person, is pressed against the frame panel of the front seat, the pressing force is applied to the seat of the front seat via a cushion member made of polyurethane foam. Transmitted to the back of the passenger, causing discomfort to the occupant of the front seat.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and it is possible to suppress the vibration in the left-right direction by improving the holdability of the back of a seated person, and to exhibit sufficient cushioning while being thin. Accordingly, it is an object to provide a railway vehicle or an aircraft seat capable of improving the sitting comfort (ride comfort) and having a lightweight structure. It is another object of the present invention to provide a railway vehicle or aircraft seat capable of preventing the pressing force from being transmitted to the front seat occupant even when the frame panel of the back frame is pressed by the rear seat occupant. And

[0007]

Means for Solving the Problems In order to solve the above-mentioned problems, the present inventor can exhibit a high cushioning property even when thinner than a pad material such as polyurethane foam, and has a large number of voids, We focused on using a three-dimensionally structured net material that is excellent in air permeability and lightweight. 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. On the other hand, polyurethane foam itself can maintain a predetermined shape,
As described above, it could be supported by attaching it to the frame panel spanned between the front edges of the side frame members, but the three-dimensional net material itself has a predetermined shape along the back of the occupant. Can not be maintained.

Therefore, the side frame member is positioned forward of the frame panel, that is, the side frame member is disposed at a position corresponding to the vicinity of both sides of a conventional cushion member made of polyurethane foam processed into a predetermined shape. By stretching the three-dimensional net material along the side frame material and the frame panel, it is possible to form a predetermined shape, and since the three-dimensional net material is thin, the side frame material is thin. The distance (step) between the vicinity of both sides of the back along the material and the vicinity of the center located in front of the frame panel can be increased, and the seating is almost the same size as when using polyurethane foam Focused on improving the hold feeling of the elderly. Further, in order to prevent transmission of the pressing force due to the frame panel being pressed from behind, a gap is provided between the vicinity of the central portion of the three-dimensional net material stretched between the side frame members and the frame panel. We paid attention to that.

According to the first aspect of the present invention, a frame structure having a back frame and a seat frame, and a pair of grounds stretched over the frame structure and spaced apart from each other. A railway vehicle or aircraft seat including a cushion member formed of a net material having a three-dimensional structure formed by joining knitted fabrics with a connecting yarn, wherein the back frame includes a frame panel,
A side frame member provided in front of the frame panel with a front edge separated by a predetermined distance from each side of the frame panel, wherein the cushion member made of the three-dimensionally structured net material is at least seated. A portion corresponding to the lumbar vertebra from the thoracic vertebra of the person, is stretched between side frame members of the back frame so that both sides protrude forward rather than substantially at the center. Provide a sheet for use. According to the second aspect of the present invention, the thickness of the connecting yarn of the three-dimensionally structured net material is 200.
The rail car or aircraft seat according to claim 1, wherein the seat is denier or more. In the present invention according to claim 3, the cushion member made of the three-dimensionally structured net material is provided between the side frame materials of the back frame.
3. The railway vehicle or aircraft seat according to claim 1, wherein the seat is stretched apart from the frame panel. In the present invention according to claim 4, a side frame member of the back frame is provided with a main side frame member provided in front of the frame panel with a front edge separated by a predetermined amount with respect to each side of the frame panel, The railcar or aircraft according to any one of claims 1 to 3, further comprising a shape forming frame material provided so as to swell further forward from a front end edge of each main side frame material. Provide a sheet for use. According to the fifth aspect of the present invention, the first shaping frame member is provided at a position corresponding to both sides from the thoracic vertebra to the lumbar vertebra of the seated person, and corresponds to both sides from the cervical vertebra to the head. The railcar or aircraft seat according to claim 4, further comprising a second shape forming frame member provided at a position where the second shape is formed. Claim 6
In the present invention described above, each of the main side frame members is
From the vicinity corresponding to both sides of the cervical vertebra toward the top,
The railway vehicle or the aircraft seat according to claim 4 or 5, further comprising an inclined frame portion inclined backward. According to the present invention described in claim 7, the back cushion member and the seat cushion member made of the three-dimensionally structured net material are formed integrally with each other. The present invention provides a railway vehicle or an aircraft seat according to any one of the above. In the present invention described in claim 8, the cushion member made of the three-dimensionally structured net material is provided detachably with respect to the frame structure. The present invention provides a railway vehicle or an aircraft seat as described above. According to a ninth aspect of the present invention, there is provided a railway vehicle or aircraft seat further comprising a skin material for covering the cushion member made of the three-dimensionally structured net material. According to the tenth aspect of the present invention, in the skin material covered with the back frame, the surface friction force is higher than that of the skin material at any part from the part where the thoracic spine of the seated person is located to the part where the cervical vertebra is located 10. A railway vehicle or aircraft seat according to claim 9, further comprising a non-slip member. In the invention according to claim 11, the skin material comprises a surface layer and a back surface layer, wherein the back surface layer is made of a felt material. provide. According to a twelfth aspect of the present invention, the net material and the skin material having the three-dimensional structure are made of a polyester-based synthetic resin.
A railcar or an aircraft seat according to any one of the eleventh to eleventh aspects. According to a thirteenth aspect of the present invention, there is provided the railway vehicle or aircraft seat according to any one of the eighth to twelfth aspects, wherein the skin material is detachable.

[0010]

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 13
BRIEF DESCRIPTION OF THE DRAWINGS It is a figure for demonstrating the railway vehicle or aircraft seat 1 concerning one Embodiment of this invention, This railway vehicle or aircraft seat 1 is comprised with the back part 2 and the seat part 3. FIG. In the present embodiment, the present invention is applied to a three-seat seat for a railway vehicle, and as shown in FIG. 13, three sets of frame structures 10 for forming the railway vehicle or aircraft seat 1 are provided. And are supported by a common underframe 6.

As shown in FIG. 13, the underframe 6 includes two long-side frame members 61, which are spaced apart in the front-rear direction.
62 and the short-side frame members 63, 64 which are bridged between the opposing ends of the two long-side frame members 61, 62.
, Are supported by legs (not shown) fixed to the vehicle floor, and are rotatable in the horizontal direction 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). It is provided so that it can be rotated 180 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 tip 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 to 6, 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. The main side frame members 221 and 221 are formed of long frame members having a substantially rectangular cross section, and are disposed along the longitudinal direction in the vertical direction. 221a, 221a
Are located in front of each other at a predetermined distance from each of the side portions 212 of the frame panel 210 (see FIGS. 4 to 4).
See FIG. 6). In this regard, a conventional railway vehicle in which a polyurethane foam pre-processed into a predetermined shape is disposed as a cushion member after a frame panel is attached between the front edges of a frame material corresponding to the main side frame material of the present embodiment. Sheet structure.

The main side frame member 22 of the present embodiment
1, 221 further, as shown in FIG. 2 and FIG.
An intermediate frame portion 221b having a shape that is curved from the vicinity corresponding to both sides of the cervical vertebra of the seated person to the vicinity corresponding to both sides of the lumbar vertebra or the buttocks, and protrudes forward from a substantially central portion toward a lower portion, An inclined frame portion 221c positioned above the intermediate frame portion 221b and inclined rearward toward the upper portion;
A mounting frame portion 221d is provided below the mounting portion 21b and has a mounting hole 221e that is mounted on the support shaft 65 that supports the tilting operation of the back portion 2. The support shaft 6
5 is supported by an armrest mounting frame (not shown) protruding from the underframe 6. FIG.
And the main side frame member 2 as shown in FIG.
One of the mounting frame portions 221d of the first and the second 221 is
It has an extension frame portion 221f extending below the other, and this extension frame portion 221f is supported by an armrest mounting frame provided on the underframe 6, and in FIG. 3 and FIG. By contacting the tilt range restriction frame 66 shown below
The structure is such that the tilt range of the back part 2 is regulated.

FIG. 12 shows a state in which the main side frame member 221 of this embodiment is mounted on the support shaft 65 and a conventional seat for a railway vehicle using a polyurethane foam as a cushion member. FIG. 9 is a diagram showing a state in which a side frame member 901 is attached to a support shaft 65 and disposed. In each case, the position of the support shaft 65 is the same in the drawing, and the rear end edge (rear end edge of the inclined frame portion 221c) of the main side frame member 221 located at the rearmost position and after the conventional side frame member 901. The state where the position with the edge is set to be the same is shown. Also, the arrangement positions of the frame panels are set the same.

As is apparent from this figure, according to the main side frame member 221 of this embodiment, the front edge 2
A sufficient horizontal distance between the frame member 21a and the frame panel 210 can be ensured, and a thin cushion member 40 made of a net material having a three-dimensional structure, which will be described later, is provided between the pair of main side frame members 221a, 221a. When the cushion member 40 is stretched, the horizontal space between the vicinity of the center portion (substantially the center portion) of the cushion member 40 in the width direction and the front edges 221a, 221a can be increased, so that the seat back can be held more easily. It can be seen that it can be improved. On the other hand, when the cushion member made of polyurethane foam is attached to the frame panel at the position where the conventional side frame member 901 is disposed, the position of the side front end edge of the cushion member is changed to the main side of the present embodiment. Even if it is set to be the same as the position of the front edge 221a of the frame member 221, since the substantially central portion of the cushion member located between the side frame members 901 and 901 needs to have a considerable thickness as described above, The horizontal distance between the substantially central portion and the front edge of the side portion is inevitably smaller than in the present embodiment.

The above-mentioned 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. Specifically, one end is connected to the main side frame member 22.
1 and 221 are fixed at substantially the center in the longitudinal direction, the other ends are fixed near the lower ends of the main side frame members 221 and 221, and the intermediate portions thereof are the front edges 221 a and 221 a of the main side frame members 221 and 221. It is curved so as to bulge forward from 221a. 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 in the sitting position of the seated person, 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.

Specifically, the second shape forming frame member 2
23, 223 are main side frame members 221, 22
One end is fixed near the upper part of the first intermediate frame portions 221b, 221b, swells forward as it goes upward, and then is bent substantially horizontally rearward to become inclined.
The other end is fixed near the upper part of c, 221c. 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. It swells forward. Therefore, of the cushion members made of the three-dimensionally structured net material,
In the region where the head comes into contact with the head from the cervical vertebra stretched between the frame members 223 and 223, the sink stroke due to the load increases. In particular, according to the present embodiment, the main side frame members 221 and 221 in the relevant portion are constituted by the inclined frame portions 221c and 221c that are inclined rearward toward the upper part.
Has a shape that has escaped rearward, so that it is possible to secure a greater sinking stroke when a load is applied when the head comes in contact with the cervical vertebra.

The main side frame members 221, 221
The upper end frame member 230 is disposed between the upper portions of the 21 inclined frame portions 221c, 221c.
In this case, in the present embodiment, a flat plate-shaped frame member having a predetermined thickness is disposed so that the width direction thereof is along the vertical direction. Since the cushion member has the upper end frame member 230, the stroke is limited when the cushion member comes into contact with the upper end frame member 230. However, by setting the disposing direction of the upper end frame member 230 as described above, the width direction of the cushion member can be changed. The limit point of the stroke when the load on the head is applied from the cervical vertebra can be set to a position further backward as compared with the case where it is arranged along the direction.

The back frame 20 has a lower frame member 240 in addition to the side frame members 220 and 220 and the upper frame member 230. The lower end frame member 240 is formed in a substantially U-shape, and each end is fixed to each lower end of the intermediate frame portions 221b, 221b, and the intermediate portion protruding rearward contacts the lower portion of the frame panel 210. It is arranged. Lower frame material 24
0 is to maintain the interval between the side frame members 220, 220 and to supplement the strength of the frame panel 210,
Together with the upper frame member 230, the shape of the back frame 20 is formed.

The main side frame members 221, 221
21, the inclined frame portions 221c, 221c are inclined rearward, so that the inclined frame portions 221c, 221c are inclined.
A step is formed between the rear edge of 1c and the rear edges of the intermediate frame portions 221b, 221b located below the rear edge. In the present embodiment, as shown in FIG. 3, the table is provided such that the table 250 used by the occupant of the rear seat is accommodated within the range of the step by using the step. The table 250 has an arm member 251.
The shaft is fixed to the mounting frame portions 221d, 221d through the shaft, so that it can be pulled out rearward in FIG. 3 and used.

As shown in FIGS. 2 and 3, the seat frame 30 is provided with side frame members 310, 310 which are arranged apart from each other 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. Although not shown in FIGS. 2 and 3, the rear ends of the substantially horizontal portions 311 and 311 are pivotally supported by mounting shafts 69 a on mounting plates 69 provided on the underframe 6 (FIG. 18).
The vertical portions 312 and 312 are lifted upward to separate the front portion of the seat frame 30 from the underframe 6.

In the case of a cushion member made of a conventional polyurethane foam, it is very easy to remove the cushion member because it is simply attached with a planar fastener. Therefore, with the conventional seat, the maintenance of the control mechanism can be performed only by removing the cushion member. However, in the case of the present embodiment, as described later, the net material 100 having a three-dimensional structure is used.
Cushion members 40 and 50 and skin materials 70,
Even though the detachable members 80 are attached to the frame structure 10, they cannot be detached without removing all the attachment members such as the set plate. Therefore, in order to perform the maintenance work of the control mechanism in a short time and easily, as shown in FIG. 3, the substantially vertical portions 312 and 312 can be lifted and separated from the underframe 6 and housed in the legs. This facilitates maintenance work of the control mechanism.

A substantially vertical portion 3 is provided between the side frame members 310 and 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.

Between the lower ends of the substantially vertical portions 312 and 312, two front end auxiliary frame members 316 and 317 are arranged on the front side and the rear side in the radial direction 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.

Further, the front end auxiliary frame members 316, 317
Locking members 318, 318 projecting downward in a substantially U-shape are provided in the vicinity of each side of the locking member 318, and the locking members 318, 318 are formed in the locking holes 67 formed in the underframe 6. Locked by being inserted into Specifically, a lock member (not shown) urged by a resilient member to protrude into the hole 67 in a normal state is provided on the peripheral wall of the lock hole 67, and the locked member is locked. When the lower portions of the members 318, 318 are inserted into the locking holes 67 and come into contact with the lower portions of the lock members, the lock members once retreat backward against the urging force of the elastic members, and then are locked. , 318 are pushed by the elastic member and protrude into and engage with the substantially U-shaped groove. When releasing the lock, the lock member may be retracted manually, for example, to be released from the groove of the locked members 318, 318, and thereby the substantially vertical portions 312, 3
12 can be lifted upward. It is needless to say that the structure of the lock mechanism is not limited to this.

As shown in FIG. 2, a first cushion member 40 is stretched between the side frame members 220 constituting the back frame 20. The first cushion member 40 is made of a net material 100 having a three-dimensional structure. The first cushion member 40 can exhibit a high cushioning property even when it is thin compared to a polyurethane foam. It is preferable to stretch with a low elongation rate, and further, it is preferable to stretch with an elongation rate of less than 5% when a load of the design standard position and the design standard is applied. Thereby, the sag due to the elastic deformation and thermal shock of the three-dimensional net member 100 constituting the first cushion member 40 can be reduced or prevented, and the direction of the input vibration can be changed by sufficiently exhibiting the spring property. It becomes possible and contributes to improvement of vibration absorption characteristics. The structure of the three-dimensional net material 100 itself will be described later.

The first made of the net material 100 having a three-dimensional structure
As shown in FIG. 2, the cushion member 40 of the second shape forming frame members 223, 223,
The main side frame members 221 and 221 are stretched between midway portions and between the first shape forming frame members 222 and 222.

Specifically, first, the side frame material 22
As shown in FIGS. 4 and 8, between the second shape forming frame members 223 and 223 constituting a part of
A loop net 46 is provided between the second shape forming frame members 223 and 223 in a loop shape and functions as a resilience imparting member.
Numerals 0 are stacked along the surface shape of the loop net 46. The loop net 46 is connected to the first cushion member 4.
As in the case of 0, it is formed from a net material 100 having a three-dimensional structure to be described later, and is processed into a substantially rectangular shape. , Surrounding the second shape forming frame members 223 and 223,
47 are extended in a loop shape by engaging with each other. The second shape forming frame members 223, 2
A felt member 44 is further interposed between the loop member 23 and the loop net 46 to further reduce the feeling of foreign matter of the second shape forming frame members 223, 223.

Second shape forming frame members 223, 223
The upper cushion portion 410 of the first cushion member 40 disposed therebetween constitutes a headrest portion. However, since the upper cushion portion 410 is stretched at a low elongation rate as described above, the upper cushion portion 410 sinks under a load. Insufficient resilience. Therefore, by arranging the loop net 46 functioning as a restoring member, the restoring force for urging the portion from the cervical vertebra to the head forward in a direction substantially perpendicular to the contact surface with the occupant is supplemented. It is a thing. In order to perform such a function, the loop net 46 is stretched between the second shape forming frame members 223 and 223 at an elongation rate higher than that of the first cushion member 40, and provides a soft spring feeling while having a large stroke. Those having elasticity that can be exerted are selected. Since the loop net 46 is made of the net material 100 having the three-dimensional structure as described above,
Between the occupant and the second shape forming frame members 223, 223, the net material 100 having a three-dimensional structure is arranged in two layers, so that the feeling of foreign objects can be greatly reduced.

As shown in FIGS. 2, 3, and 5, the engaging frame plates 224b, 224b fixed along the outer surfaces thereof are provided on the intermediate frame portions 221b, 221b of the main side frame members 221, 221. 224b are provided. Further, as shown in FIG. 5, the canvas 4 is attached to the side portions 40a, 40a of the first cushion member 40 in the vicinity corresponding to the intermediate frame portions 221b, 221b.
1, 41 are joined, and the canvas 41, 41
Are attached with set plates 42, 42.
A portion (hereinafter, “intermediate cushion portion”) 420 of the first cushion member 40 corresponding to the intermediate frame portions 221b, 221b is formed by the set plate 4
2 and 42 are engaged frame plates 224b and 224, respectively.
It is stretched by being engaged with b. Also, each side 4
As shown in FIG. 5, 0 a and 40 a are folded back once and then further folded forward, and the edge portions 40 b and 40 b are provided with the canvas 43 and 43 interposed therebetween. It is sewn to the front part 40c, 40c near the side of the intermediate cushion part 420. Accordingly, the intermediate cushion portions 420 are interposed in three layers between the intermediate frame portions 221b, 221b and the occupant, and the feeling of foreign objects is reduced.

Further, the intermediate frame portions 221b, 221b
, Auxiliary frame members 225, 225 are attached to the respective inner surface sides.
The canvas 43, 43 sewn to the edge portions 40b, 40b
Are attached via ring-shaped fastening members 225a, 225a. By arranging the canvases 43, 43 in this manner, the front portions 40c, 40c near the side portions of the intermediate cushion portion 420 are pulled rearward. As a result, as shown in FIG.
, A substantially central portion (near the central portion in the width direction of the cushion member 40) 450 between the front portions 40c, 40c near the side portions.
Form a concave portion located behind the side portions 40a, 40a, and the first shape forming frame members 222, 222 located below the intermediate cushion portion 420.
Area located between (hereinafter, “lower cushion area”) 4
30 also follows this shape to prevent the substantially central portion 450 from protruding forward as shown in FIG. That is, the canvas 43, 43 has a function of securely holding the shape of the first cushion member 40, which is disposed in a state where the both side portions 40a, 40a are projected forward rather than the substantially central portion 450, when stretched. It fulfills.

As shown in FIG. 2, FIG. 3, and FIG. 6, the portions of the main side frame members 221 and 221 to which the first shape forming frame members 222 and 222 are attached are also provided on the outer surfaces thereof. Engaging frame plates 224c, 224c fixed along are provided, and canvases 41, 41 are joined to the side portions 40a, 40a of the lower cushion portion 430. Then, the lower cushion portion 430 connects the set plates 42, 42 attached to the canvases 41, 41 to the engagement frame plate 2.
It is stretched by engaging with 24c, 224c.
As shown in FIG. 6, the side portions 40a, 40a of the lower cushion portion 430 are folded back, and the canvases 41, 41 are sewn to the folded position.
The lower cushion portion 430 also has a multi-layer structure between the frame members 222 and 222 and the seated person to reduce the feeling of foreign objects. In the present embodiment, as shown in FIG. 6, the side portions 40a, 40 folded back
a has been folded back further forward, and the folded portions have a three-layer structure in which the folded portions are joined by sewing or vibration welding.
The structure is such that the feeling of foreign objects can be further reduced.

Further, the first shape forming frame member 222,
Between the 222 and the lower cushion portion 430, felt members 44, 44 for further reducing the feeling of foreign matter are provided. The first shape forming frame member 22
As described above, the first and second frame members 222 and 222 are curved so that the intermediate portion swells forward with respect to the main side frame members 221 and 221. The lower cushion portion 430 stretched on the side portions 4 is larger than the intermediate cushion portion 420.
0a and 40a are greatly extended forward, and approximately 450
And the difference between the arrangement positions is increased, so that the feeling of holding from the thoracic vertebra to the lumbar vertebra of the seated person is increased, and it is possible to increase the suppressing power of the sway caused by the vibration input.

However, when the three-dimensional net member 100 constituting the first cushion member 40 is stretched as described above, the net member 100 has such a degree that the air gap can be maintained even when a load is applied to the frame panel 210. Are spaced apart from each other. As a result, even if the legs or the like of the occupant of the rear seat contact the frame panel 210 of the front seat, the partially generated pressing force is prevented from being transmitted to the occupant of the front seat.

Here, the structure of the net material 100 having a three-dimensional structure constituting the first cushion member 40 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 (fine mesh) which is continuous from a yarn obtained by twisting a single fiber in both the wale direction and the course direction. ). On the other hand, as shown in FIG. 16, the other ground knitted fabric 120 has a honeycomb (hexagonal) mesh formed from a yarn obtained by twisting short fibers, for example.
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 yarns forming the ground knitted fabrics 110 and 120 are not particularly limited, and the knitting work can be performed while the waist strength required for the three-dimensional knitted fabric can be provided. 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.

As the connecting yarn 130, it is preferable to use a monofilament yarn, 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 the connecting yarn 130 is not particularly limited. For example, synthetic fibers such as polypropylene, polyester, polyamide, polyacrylonitrile, rayon and the like, and recycled fibers, 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.

[0042]

[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, as shown in FIGS. 2 and 7, 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 the three-dimensional structure described above, similarly to the first cushion member 40,
Preferably, it is stretched in a substantially concave shape with a low elongation percentage and a substantially central portion sinking down near the side edge. Specifically, as shown in FIG. 7, each side 51, 51 of the second cushion member 50 is folded downward, and at the folded portion, canvases 53, 53 are sewn by suturing means. It is connected. Then, after the folded side portions 51, 51 are positioned inside the substantially horizontal portions 311 and 311, the canvases 53 and 5
3 is positioned outside the substantially horizontal portions 311 and 311 and the canvas 5
The set plate 54 connected to the lower ends of the members 3 and 53 by suturing or the like is stretched by engaging the lateral auxiliary frame members 315 and 315 substantially parallel to the substantially horizontal portions 311 and 311. Side frame material 310,3
The side frame members 310, 310 are arranged by folding the side portions 51, 51 inside the inside 10.
The second cushion member 50 has two layers between the seat frame and the occupant, and the side frame members 310, 3
Reduces 10 foreign body sensations

The front edge 52 of the second cushion member 50
Is, as shown in FIG. 2 and FIG.
After hanging down so as to cover the substantially vertical portions 312, 312 of the 10, 310, two front end auxiliary frame members 316, 317 disposed between the lower ends of the substantially vertical portions 312, 312.
The front end auxiliary frame member 31 disposed rearward through the lower side of the front end auxiliary frame member 316 disposed forward.
7, an attachment member (not shown) such as a set plate connected to an end of the front edge portion 52 by means such as sewing.
Is engaged through.

As shown in FIGS. 2, 7 and 9, the back surface of the front edge 52 is urged in a direction substantially perpendicular to the contact surface with the occupant to act as a restoring force against load deformation. A supporting spring member 55 as a restoring member to be provided is stacked and disposed. The support spring member 55 may provide a soft spring feeling and a large stroke feeling, as long as it can supplement the restoring force of the front edge portion 52 of the second cushion member 50.
Although the number and the shape of the arrangement are not limited, in the present embodiment, two thin plate-like members are arranged at predetermined intervals.

It is preferable that the support spring member 55 is formed of a synthetic resin material. When formed from a synthetic resin material, its rigidity is close to that of the second cushion member 50 made of a net material having a three-dimensional structure, and therefore, the feeling of foreign substances when seated is small. The synthetic resin material is preferably formed of a thermoplastic resin like the three-dimensional structure net material 100. For example, polyethylene terephthalate (PET), polybutylene terephthalate (PBT)
Thermoplastic resins such as nylons, polyamide resins such as nylon 6 and nylon 66, polyolefin resins such as polyethylene and polypropylene, or resins obtained by mixing two or more of these resins. Can be used. In addition, polyester resin is excellent in recyclability and is suitable. Among them, a material having high toughness is preferable. As such a material, for example, high toughness PBT manufactured by Kanebo Synthetic Co., Ltd. having physical properties as shown in the following table can be mentioned.

[0048]

[Table 2]

The means for laminating and fixing the support spring member 55 on the back surface of the second cushion member 50 is optional. However, considering the ease of fixing work and the reliability of fixing the three-dimensional structure to the net material, vibration Welding is appropriate. However, the entire surface of the support spring member 55 may be subjected to vibration welding, or may be partially subjected to vibration welding and fixed.

Also, as shown in FIGS. 2, 7 and 9, it is preferable to provide a base cushion member 60 at a slight interval on the back side of the second cushion member 50. The base cushion member 60 is formed of a net material 100 having a three-dimensional structure similarly to the second cushion member 50, but is stretched at a higher elongation rate than the second cushion member 50, and the thigh portion at the time of sitting is The effect of increasing the feeling of stroke or thickness under the butt and reducing the feeling of contact with the frame material or the like is exhibited.

As shown in FIG. 7, the base cushion member 60 is provided between the lateral auxiliary frame members 315 and 315 which are arranged substantially parallel to the side frame members 310 and 310.
It is engaged via set plates 61 fixed to its side. A synthetic resin plate (not shown) is fixed to an end of the front edge portion 62, and as shown in FIG. 9, a ring-shaped fastening member 63 penetrating the synthetic resin plate.
Of the two front end auxiliary frame members 316 and 317 disposed between the lower ends of the substantially vertical portions 312 and 312 of the side frame members 310 and 310 via the front end auxiliary frame member 316 disposed forward. Have been.

As shown in FIGS. 7 and 9, a support spring member 65 is laminated on the back surface of the front edge portion 62 of the base cushion member 60, similarly to the front edge portion 52 of the second cushion member 50. Is preferred. Thereby, the restoring force at the front edge portion 52 of the second cushion member 50 located on the base cushion member 60 can be further increased. The rear end 63 of the base cushion member 60 is
The auxiliary frame member 318 disposed between the rear ends of the substantially horizontal portions 311 and 311 is engaged via a set plate 318a (see FIGS. 2 and 10).

On the other hand, the first cushion member 40
As shown in FIG. 10, a rear end portion 50b of the second cushion member 50 is laminated on the lower end portion 40d, and is integrated with each other by suturing means or vibration welding means. Further, of the rear end portion 50b of the second cushion member 50, an intermediate portion excluding the vicinity of both sides in the width direction protrudes rearward, and the rear end portion 50b of the frame member 66a provided on the underframe 6 behind the seat portion 3 The connection is made using an arbitrary fastening member 68 such as a ring member. 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. In addition, since 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, the first cushion member 4 arranged on the back frame 20 described above.
0 is covered with a back skin material 70, and the second cushion member 50 arranged on the seat frame 30 is covered with a seat skin material 80. Back skin material 70
Each of the skin material 80 for the seat and the seat portion is configured by laminating the surface layers 71, 81 and the back layers 72, 82.

The surface layers 71 and 81 and the back layers 72 and 82 of the back skin material 70 and the seat skin material 80 are preferably made of polyester fibers. This is because they have excellent recyclability and are easy to dispose. In addition to the skin materials 70 and 80, the net material 100, the loop net 46, and the support spring members 55, which have the above-described three-dimensional structure and constitute the cushion members 40 and 50, respectively.
It is preferable that all members except the metal frame structure 10, such as 65, be made of a polyester-based synthetic resin. This is because there is no need to distinguish each of them for recycling or disposal.

The fabric forming the surface layers 71 and 81 is not limited. For example, in order to enhance the contact feeling,
It is possible to use a fabric whose raised surface is in contact with the occupant, use a woven or knitted fabric having a mesh in consideration of air permeability, or use natural leather or synthetic leather.
Further, a net material having a thin three-dimensional structure 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.

Although the back layers 72 and 82 are not particularly limited, since the cushion members 40 and 50 are made of the three-dimensional net material 100, the feeling of the stitch structure is not transmitted to the occupant. It is preferable to use a member having a soft cushioning property. As such a member, for example, it is preferable to use a felt material made of a nonwoven fabric having a predetermined thickness, but it is not limited to this. However, since the friction coefficient between the cushion members 40 and 50 is increased by using the felt material,
Each skin material 70, 80 for the cushion members 40, 50
It has a high effect of suppressing slippage and suppressing the sway of the back of the seated person. In this embodiment, as shown in FIGS. 4 to 7, two felt members 72 a, 72 b, or 8 respectively.
2a and 82b are laminated, but one may be used depending on the thickness and material per felt material.
It is also possible to use a laminate of two or more sheets.

In the back skin material 70, the first
As shown in FIG. 4, a trim cloth 710 that covers both sides and the back surface of the frame panel 210 is connected to a portion that covers the upper cushion portion 410 that constitutes the headrest portion of the cushion member 40 of FIG. Is formed. In addition, a felt material 720 is laminated on a portion of the trim cloth 710 that covers both sides, similarly to the back skin material 70 that covers the front surface.

At the portion covering the intermediate cushion portion 420 and the lower cushion portion 430 of the first cushion member 40, as shown in FIGS. 5 and 6, in the width direction (the direction facing the side frame members 220, 220). Along the substantially central portion (near the center) 701 and each side edge portion 702 on both sides thereof
702 are folded or divided between each other, and the surface layers 71 adjacent to each other are overlapped and sewn. As a result, two concave lines 703 and 703 are formed between the intermediate portion 701 and the side edge portions 702 and 702 along the vertical direction of the back portion and at predetermined intervals in the width direction. When seated, the side edge portions 702 and 702 are easily swelled forward with respect to the intermediate portion 701 sandwiched between the concave lines 703 and 703, so that the holdability can be further improved.

The intermediate portion 701 and each side edge portion 702,7
Since the suturing portion of the first cushion member 40 protrudes downward, a concave portion 440 is formed in the intermediate cushion portion 420 or the lower cushion portion 430 of the first cushion member 40 such that a position corresponding to the portion is half-crushed by vibration welding. It is preferable to keep it. By accommodating the suturing site in the concave portion 440, displacement can be prevented. Further, in order to prevent the back skin material 70 from rising, the first cushion member 40 and the back skin material 70 may be partially joined by means such as stitching.

It is to be noted that both sides of the part covering the intermediate cushion part 420 and the lower cushion part 430 are covered only with the trim cloth 710 connected to the back skin material 70, and the ends of the trim cloth 710 are attached to the frame panel 210. Fastening member 710 such as a planar fastener provided near the back side
a, 710a so as to be detachable.

As shown in FIG. 1, on the surface of the back skin material 70, an arbitrary portion from the portion where the thoracic vertebra of the seated person is located to the portion where the cervical vertebra is located, as shown in FIG. A non-slip member 75 having high frictional force is fixed.
The type of the non-slip member 75 is not limited,
For example, a moquette made of polyester fibers can be used. By arranging the non-slip member 75 in this way, the sway of the back of the seated person can be suppressed,
Contributes to the improvement of riding comfort. In addition, this non-slip member 75
Does not adhere to the surface of the back skin material 70 but replaces only the relevant portion with the back skin material 70,
It is also possible to adopt a configuration in which sewing is performed without sewing at another part of the zero.

As shown in FIG. 7, similarly to the back skin material 70, the seat skin material 80 includes an intermediate portion 801 and side edges 802 and 802 on both sides thereof along the width direction. After being folded or divided, the surface layers 81 adjacent to each other are partially overlapped and sewn, and two concave portions are formed along the front-back direction of the seat portion and at predetermined intervals in the width direction. Lines 803 and 803 are formed. This makes it easier for the side edges 802 and 802 bordering on the concave lines 803 and 803 to relatively swell upward when seated, thereby improving the holdability. Further, a felt material 820 is also laminated on a trim cloth 810 covering both sides, and a set plate 810a is attached to a lower end of the trim cloth 810. The set plate 810a is stretched by engaging the lateral auxiliary frame members 315, 315 substantially parallel to the side frame members 310, 310 of the seat frame 30.

As in the case of the cushion members 40 and 50, the lower end portion of the back skin material 70 and the rear end portion of the seat skin material 80 are, as shown in FIGS.
The pieces 81 are sewn together after facing each other and are integrated. The back skin material 70 and the seat skin material 80 are not necessarily integrated, but by integrating, the followability to the sitting posture is improved, and the fit to the seated person is improved. Sway in the direction can be further suppressed. As shown in FIGS. 1 and 11, on both sides of the rear end of the surface layer 81 forming the seat covering material 80, there are protruding pieces 81a, 8 protruding rearward.
1a is provided. The projecting pieces 81a, 81a
Frame material 66a of the underframe 6 provided behind the seat 3
Are connected via a ring-shaped fastening member 68.
This prevents floating near the connecting portion between the back skin material 70 and the seat skin material 80, thereby improving the sitting feeling and the aesthetic appearance.

According to the railway vehicle or aircraft seat 1 of this embodiment, the back frame 20 and the seat frame 3
The first cushion member 40 and the second cushion member 50 which are stretched at 0 are made of a net material 100 having a three-dimensional structure, and at least a portion of the first cushion member 40 near the thoracic vertebra to the lumbar vertebra. However, even when not seated, it is stretched so that the side portion swells forward rather than the substantially central portion in the width direction. Therefore, when a person is seated, the substantially central portion sinks, and the degree of swelling of the side portion becomes relatively large, so that a high holdability can be exhibited for the seated person.

In order to obtain a desired cushioning property by using a conventional cushion member made of urethane foam, a certain thickness is required at a substantially central portion in the width direction. Since there is a restriction that the distance from the section seat must be more than a predetermined value, there is a limit in increasing the thickness of the side part in improving the holdability. However, according to the present embodiment, the first cushion member 40 is made of the net material 100 having a three-dimensional structure, and the thickness required to obtain the same cushioning property as the conventionally used urethane foam can be reduced. Therefore, the degree of swelling of the both sides relative to the substantially central portion at the time of sitting can be increased, and the holdability for the seated person can be improved. In particular, in the present embodiment, the degree of swelling of the side portion in a portion corresponding to the lumbar vertebra from the thoracic vertebra is large by the first shape forming frame material, and high holdability can be exhibited. Therefore, by adopting the above-described configuration, it is possible to enhance the holdability within the same size range as before without increasing the size of the entire sheet, so that people can enter and exit through the gap between the front and rear sheets. It is suitable as a sheet for railway vehicles and aircraft, which are required relatively frequently.

Further, the first cushion member 40 and the second
The cushion member 50 is a structure that is stretched as described above and is suspended and supported in a hammock manner with respect to the frame structure 10. Therefore, with respect to a change in acceleration generated when the vehicle is accelerated or decelerated, each cushion member 40,
The net material 100 having a three-dimensional structure constituting the member 50 is flexibly deformed, and the force in the shear direction can be reduced by uniform pressure support to dissipate the change in acceleration. For this reason, compared to the case of using the conventional urethane foam, the sensation of being pulled in the front-rear direction, which is felt during acceleration / deceleration, is reduced, and the change in acceleration is brought about by being input as a reaction force to the muscles of the seated person. Muscle fatigue is reduced. Moreover, according to the present embodiment, as described above, since the structure for improving the holdability from the thoracic vertebra to the lumbar vertebra of the seated person is improved, the followability of the cushion members 40 and 50 to the body is improved.
High against lateral acceleration, cushion member 40,
The relative movement of the body with respect to 50 is reduced, and the riding comfort can be improved.

According to the present embodiment, the upper cushion portion 410 (headrest portion) of the first cushion member 40 that supports the portion from the cervical vertebra to the head.
However, the resilience is supplemented by the loop net 46 as the resilience imparting member, and the structure has a soft spring feeling and a large stroke feeling. Therefore, by applying a load to the headrest portion, the head can be reliably supported from the cervical vertebra of the seated person, and the sway with respect to the lateral acceleration can be further reduced. Further, the anti-slip member 75 provided at a position corresponding to the thoracic vertebra can reduce the sway from the thoracic vertebra to the shoulder.

In this embodiment, the integrated first and second cushion members 40 and 50, and the back skin material 70 and the seat skin material 80 are provided detachably. I have. Therefore, by removing them, the cleaning operation can be easily performed, and the replacement operation at the time of breakage or the like is also easy. Further, the design can be easily changed by replacing the skin materials 70 and 80.

The railway vehicle or aircraft seat 1 of the present invention is not limited to the above embodiment. For example,
In the above-described embodiment, the first portion forming the headrest portion
The loop net 46 is arranged as a restoring member on the back surface of the upper cushion portion 410 of the cushion member 40 of FIG.
Although the configuration is such that the restoring force of the upper cushion portion 410 is supplemented, the loop net 46 is replaced with FIGS.
As shown in FIG. 0, a structure in which the support spring members 45 are stacked may be employed.

The support spring member 45 may be any material as long as it can compensate for the elasticity when a load is applied from the cervical vertebra to the head of the seated person and exerts a soft spring feeling despite a large stroke. The same thing as the support spring member 55 arrange | positioned at the seat part 3 of the said embodiment can be used. The shape and the number of arrangements are not limited.
And as shown in FIG. 20, for example, one end is formed of a long plate-like member fixed to the upper end frame member 230,
A plurality of second shape forming frame members 223 and 223 can be provided at appropriate intervals. In addition, like the support spring member 55 disposed on the seat 3, the first cushion member 40 composed of the three-dimensional net member 100 is made of a synthetic resin material to reduce the feeling of foreign matter. It is preferably formed, and particularly preferably formed from high toughness PBT. Also, the laminating means on the back surface of the first cushion member 40 is similar to the above,
It is preferable to fix the entire surface or a part thereof by vibration welding.

However, as shown in FIG. 20, when it is fixedly disposed on the upper frame member 230, it is preferable that it is detachably fixed. First cushion member 4
This is for facilitating maintenance work and replacement work. The means for detachably fixing the upper frame member 230 is arbitrary. For example, a substantially T-shaped plate (not shown) is connected to the end of the support spring member 45, and this plate is connected to the upper frame member 230. By using a screw or the like to fix to the back surface of the device, it is possible to adopt a configuration that can be attached and detached by removing the screw. Also, the upper frame member 23
A plate (not shown) provided with a spring portion biased in a direction in contact with the back surface is provided on the back surface of the support spring member 45, and the end of the support spring member 45 is connected to the spring portion and the upper end frame member 230.
It is also possible to adopt a configuration in which it is detachably sandwiched between the rear surface of the camera.

When the support spring member 45 is provided, the first cushion member 4 constituting the headrest portion is provided.
As shown in FIG. 19, the upper cushion portion 410 is provided with engaging frame plates 224a and 224a along the outer surfaces of the main side frame members 221 and 221 and the canvas 41 and 41 joined to the upper cushion portion 410. Second
The set plates 42, 42 attached to the canvases 41, 41 are pulled rearward by being positioned outside the frame members 223, 223.
4a and 224a are engaged to be stretched. Reference numerals 44, 44 are the second shape forming frame members 22.
3, 223 are felt members interposed between the second shape forming frame members 223, 223 and the canvases 42, 42 in order to reduce the feeling of foreign matter. In the upper cushion portion 410, the side portions 40a, 40a are bent backward, and the canvases 41, 41 are sewn to the bent portions.
The bent side portions 40a, 40a are preferably located inside the second shape forming frame members 223, 223. Thereby, the second shape forming frame member 22 is formed.
3, 223 and the occupant, the upper cushion portion 4
10 has two layers, so that the feeling of foreign matter of the second shape forming frame members 223 and 223 can be reduced.

In the embodiment shown in FIG. 18, unlike the above embodiment, the main side frame members 221 and 221 are different.
The upper end frame member 230 is not provided with an inclined frame portion, and the upper end frame member 230 is arranged so that the thickness direction faces up and down and the width direction faces back and forth. For this reason, when compared with the above embodiment, the stroke amount of the headrest portion is smaller, but the net material 100 having the three-dimensional structure as the first cushion member 40 is stretched between the second shape forming frame members. This is the same in that the characteristics of the net material 100 and the above-described support spring member 45 laminated thereon can exert sufficient cushioning properties to support the head from the cervical spine. However, the upper frame material 23
0 is arranged so that the width direction is directed to the front and rear, and since the stroke amount is small, in order to reduce the feeling of foreign objects, a reinforcing net material 411 obtained by bending the front end edge and sewn on the upper surface of the upper cushion portion 410 is laminated. Is preferred. Of course, in order to increase the stroke amount in the headrest portion and obtain a softer spring feeling, the main side frame member 22 is also used in the embodiment shown in FIG.
It is preferable that the same inclined frame portion as that of the above-described embodiment is formed at the upper ends of the upper and lower parts 1 and 221. Further, as shown in FIG. Further, the support spring member 45 can be provided without being fixed to the upper end frame member 230 as shown in FIG.

Further, in the above-described embodiment, the main side frame members 221 and 221 constituting the back frame 20 are formed.
221, the shape forming frame members 222 and 223, the upper end frame member 230, and the lower end frame member 240 are respectively used separately, but a frame member in which these are integrally formed arbitrarily can be used. This is the same for each frame member that constitutes the seat frame 30.

[0076]

In the seat for a railway vehicle or aircraft according to the present invention, the back frame is provided in front of the frame panel and each side of the frame panel with the front edge separated by a predetermined distance. A cushion member made of a net material having a three-dimensional structure is provided at least in a portion corresponding to the lumbar vertebra from the thoracic vertebra, and both sides thereof are projected forward from the substantially central portion to form a back frame. It is a stretched structure. The three-dimensional net material has a thin but soft spring characteristic due to deformation of the stitches constituting the ground knitted fabric and buckling characteristics and restoring force of the connecting yarn between the ground knitted fabrics. . Therefore, at the time of sitting, the side portion of the cushion member protrudes greatly forward, and the back holding property of the back is improved while having the same size as compared with the case where the cushion member is formed of the conventional urethane foam. Therefore, it is possible to improve the ride comfort by suppressing the vibration in the left-right direction.
Further, since the cushion member is made of a net material having a three-dimensional structure, the weight of the seat can be reduced as compared with the case where urethane foam is used. Further, by arranging the three-dimensionally structured net material apart from the frame panel of the back frame, even if the frame panel is pressed by the occupant of the rear seat, the occupant of the front seat can press the frame panel. The transmission of pressure can be prevented.

[Brief description of the drawings]

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

FIG. 2 is a partial cross-sectional perspective view showing the entire structure of a railway vehicle or aircraft seat according to the embodiment.

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

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

FIG. 5 is a sectional view taken along the line CC of FIG. 1;

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

FIG. 7 is an end view cut along line AA of FIG. 1;

FIG. 8 is a sectional view taken along the line EE of FIG. 1;

FIG. 9 is an end view cut along line FF of FIG. 1;

FIG. 10 is an end view cut along the line GG of FIG. 1;

FIG. 11 is an end view cut along the line HH of FIG. 1;

FIG. 12 is a schematic diagram for explaining a difference in shape between the main side frame member of the embodiment and a side frame member used in a conventional seat.

FIG. 13 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. 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.

FIG. 18 is a partially sectional perspective view showing a railway vehicle or aircraft seat according to another embodiment of the present invention.

FIG. 19 is a sectional view showing the structure of the headrest portion in the mode shown in FIG. 18;

FIG. 20 is a cross-sectional view illustrating the arrangement of the support spring member in the mode shown in FIG. 18;

FIG. 21 is a cross-sectional view for explaining another arrangement means of the support spring member.

FIG. 22 is a front view showing the structure of a conventional back frame of a seat.

FIG. 23 is a side view showing the back of a conventional seat.

FIG. 24 is a cross-sectional view showing the structure of the back of a conventional seat.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Railway vehicle or aircraft seat 2 Back part 3 Seat part 6 Underframe 10 Frame structure 20 Back frame 210 Frame panel 220 Side frame material 221 Main side frame material 221a Front edge 222 First shape forming frame material 223 Second Shaped frame material 230 Upper frame material 30 Seat frame 310 Side frame material 40 First cushion member 40a Side portion 450 Substantially central portion (near center in width direction) 45, 55, 65 Support spring member 46 Loop net 50 Second Cushion member 70 Back skin material 80 Seat skin material 71, 81 Surface layer 72, 82 Back layer 100 Three-dimensional net material 110, 120 Ground knitted fabric 130 Connecting yarn

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B64D 11/06 B64D 11/06 B68G 11/02 B68G 11/02 (72) Inventor Yoshitaka Morishita Nagoya-shi, Aichi (72) Inventor Etsunori Fujita 1-2-10 Yano Shinmachi, Aki-ku, Hiroshima-shi, Hiroshima, Japan Delta Touring Co., Ltd. (72) Inventor Kazuyoshi Chigara Hiroshima Prefecture, Hiroshima City, Aki Ward, Yano Shinmachi 1-2-10, Delta Touring Co., Ltd. (72) Inventor Yumi Ogura Hiroshima Hiroshima City, Aki Ward, Yano Shinmachi 1-2-10, Delta Touring Co., Ltd. (72) Inventor Katsumi Tashiro 100, Maeda-cho, Totsuka-ku, Yokohama-shi, Kanagawa F-term (reference) in Koito Industry Co., Ltd. 3B084 HA07 3B096 BA04

Claims (13)

[Claims] 1. A frame structure having a back frame and a seat frame, and a pair of ground knitted fabrics stretched over the frame structure and spaced apart from each other, are connected by a connecting yarn. A seat for a railway vehicle or an aircraft, comprising a cushion member made of a net material having a three-dimensional structure formed by the above, wherein the back frame has a front end with respect to a frame panel and each side of the frame panel. And a side frame member provided so as to be positioned in front of the edge separated by a predetermined amount, the cushion member made of the three-dimensional structure net material,
A railway vehicle characterized by being stretched between side frame members of the back frame so that at least a portion corresponding to a lumbar vertebra from a thoracic vertebra of a seated person, both sides of the back frame protrude forward rather than a substantially central portion. Or aircraft seats. 2. The railway vehicle or aircraft seat according to claim 1, wherein the thickness of the connecting yarn of the net material having the three-dimensional structure is 200 denier or more. 3. The cushion member made of the three-dimensionally structured net material is stretched between side frame materials of the back frame so as to be spaced from the frame panel. 2. The railway vehicle or aircraft seat according to 2. 4. A main side frame member, wherein a side frame member of the back frame is provided in front of each side of the frame panel with a front edge separated by a predetermined distance, and each main side frame member. The railcar or aircraft seat according to any one of claims 1 to 3, further comprising a shape forming frame member provided so as to protrude further forward from a front end edge of the member. 5. A first shaping frame material provided at positions corresponding to both sides from the thoracic vertebra to the lumbar vertebra of the seated person, and a shaping frame material provided at positions corresponding to both sides from the cervical vertebra to the head. 5. A second shaped frame member is provided.
The railway vehicle or aircraft seat of the above. 6. The railway according to claim 4, wherein each of the main side frame members is provided with an inclined frame portion which is inclined rearward from a portion corresponding to both sides of the cervical vertebra toward an upper portion. Vehicle or aircraft seats. 7. The cushion member for a back portion and the cushion member for a seat portion made of the three-dimensionally structured net material are formed integrally with each other. A railway vehicle or an aircraft seat according to claim 1. 8. The cushion member made of a three-dimensionally structured net material is provided detachably with respect to a frame structure.
A railway vehicle or an aircraft seat according to claim 1. 9. A railway vehicle or aircraft seat further comprising a skin material for covering the cushion member made of the three-dimensionally structured net material. 10. A non-slip member having a higher surface friction force than the skin material is provided on any part of the skin material covered by the back frame from the part where the thoracic vertebra of the seated person is located to the part where the cervical vertebra is located. The railway vehicle or aircraft seat according to claim 9, wherein the seat is provided. 11. The railway vehicle or aircraft seat according to claim 9, wherein the skin material comprises a front surface layer and a back surface layer, wherein the back surface layer comprises a felt material. 12. The railway vehicle or aircraft seat according to claim 8, wherein the net material and the skin material having the three-dimensional structure are made of a polyester-based synthetic resin. 13. The railway vehicle or aircraft seat according to claim 8, wherein the skin material is detachable.