JP5128165B2 - Seat structure - Google Patents

Description

  The present invention relates to a seat structure suitable for use in transportation equipment such as aircraft, trains, ships, forklifts, automobiles, etc., or for installation in various theaters such as movie theaters. The present invention relates to a seat structure in which a plurality of seating spaces (foot placement spaces) can be secured more than before.

  In an aircraft or the like, a considerable number of seats are provided in a row in the column direction, and a predetermined number of seats are arranged in a limited space. Therefore, the seating space for each passenger is also limited to a predetermined size, and there is always a need for a device for ensuring the seating space as wide as possible in the limited space. As a means for that, it is conceivable to reduce the thickness of the entire seat back, but for example, when the thickness of the urethane pad is reduced, it is necessary to obtain a stable and comfortable seating feeling from the start of sitting to the equilibrium state. It becomes difficult to ensure a sense of stroke between the two. In other words, even if the urethane pad is thinned, it can be thinned only to the extent that a predetermined stroke feeling can be secured. Further, in particular, when a reclining position of the back seat (seat back) in the front seat is taken and a resting posture is taken, there is a problem that a footrest (footrest) space for a seated person in the rear seat is greatly limited, and comfort is impaired.

  The present invention has been made in view of the above, and while the seat back portion and the seat cushion portion are thin and thin, it has a sufficient stroke feeling at the time of sitting, and without reclining the seat back in the sitting state, It is an object of the present invention to provide a seat structure that can take a resting posture and has excellent vibration absorption characteristics.

In order to solve the above problem, in the present invention according to claim 1, the back frame and the cushion frame are respectively
A metal spring frame formed of a metal spring material and provided with a pair of side frames positioned at a predetermined interval and an edge frame positioned between at least one end of each side frame;
A resin frame formed of a synthetic resin, covering at least the surface side of the metal spring frame, and having a side portion having a width wider than the diameter of the metal spring frame;
The back frame and the cushion frame are supported by a frame support base having a back frame support portion located on both sides of the back frame and a cushion frame support portion located on the lower side of the cushion frame,
The metal spring frame for the back frame includes an upper edge frame as the edge frame located between the vicinity of the upper ends of the side frames, and the metal spring for the back frame is provided on the back frame support portion. The side frames of the frame are connected, and the portion located above the connecting portion is attached so as to be movable in the front-rear direction by the elastic force of the metal spring frame,
The metal spring frame for the cushion frame includes a front edge frame as the edge frame located between the vicinity of the front end portions of the side frames, and the front edge frame is attached to the cushion frame support portion. The edge side is supported so that it can move up and down,
And,
Provided is a seat structure in which a fabric is stretched between the sides of the resin frames of the back frame and the cushion frame .
According to a second aspect of the present invention, there is provided the seat structure according to the first aspect, wherein the metal spring frame for the back frame has a spring constant in the bending direction of 10 to 40 N / mm. .
In the present invention according to claim 3, the metal spring frame for the cushion frame has a seating structure according to claim 1 or 2 , wherein a spring constant in a bending direction is in a range of 40 to 80 N / mm. provide.
In the present invention according to claim 4, the resin frame for the back frame is formed so that the spring constant when bent in the thickness direction of each side portion is in the range of 5 to 40 N / mm. The seat structure according to any one of claims 1 to 3 , wherein the seat structure is provided.
In this invention of Claim 5, the resin frame for the said cushion frame is formed so that the spring constant at the time of bending in the thickness direction of each side part is the range of 20-80 N / mm. The seat structure according to any one of claims 1 to 4 , wherein the seat structure is provided.
In the present invention described in claim 6, the fabric is stretched on a resin frame for a back frame and a resin frame for a cushion frame, respectively, with a tension of 0 to 5% elongation. The seat structure according to any one of 1 to 5 is provided.
According to a seventh aspect of the present invention, there is provided the seat structure according to any one of the first to sixth aspects , wherein the fabric is made of a three-dimensional solid knitted fabric or a two-dimensional net material.
In this invention of Claim 8, each side part of the said resin frame is equipped with the curved surface curved from the surface side to the back surface side from the width direction middle part to the inner periphery, and each side of this resin frame The seat structure according to any one of claims 1 to 7 , wherein the fabric is stretched over the surface side of the portion.

  According to the seat structure of the present invention, a back frame or a cushion frame is used that has a metal spring frame and a resin frame covering the metal frame and wider than the diameter of the metal spring frame. The fabric is stretched around each side. Therefore, when this structure is applied to the back frame, when the seating starts, the fabric is pressed backward by the back of the person, and accordingly, the wide resin frame also has a portion closer to the inner periphery toward the rear. Will bend. When a further load is applied, the metal spring frame starts to deform backward due to its elastic force. For this reason, the stroke feeling due to the bending of the resin frame and the stroke feeling due to the bending of the metal spring frame act, and a sufficient stroke feeling can be obtained even if the fabric and the covering material covering it are thin. In particular, different forces that support the spine in multiple stages act on the back of the person, such as the elasticity of the resin frame alone and the elasticity of the metal spring frame and the resin frame. For this reason, even if the substantial fluctuation amount is small, compared with the case where the back is supported with the same supporting force from the start of sitting to the equilibrium state, the person can feel a large stroke feeling. In this respect, the same can be said when the same structure is adopted as the cushion frame. Compared to the case where the heel and legs are supported with the same supporting force while being thin and having a small amount of fluctuation, I feel a greater sense of stroke.

  In addition, when the seated person tries to take a resting posture and puts his weight on the back, the elasticity of the metal spring frame and the resin frame is within the range of action, so the spring feeling is soft and the inclination You can relax even if the angle is limited. For this reason, compared with the seat structure which has a reclining mechanism, there are few restrictions of the foot seat (footrest) space of a backseat seated person.

  In addition, by providing the cushion frame so that the trailing edge can be moved up and down, when vibration is input, the trailing edge moves up and down according to the elastic force of the metal spring frame constituting the cushion frame. Excellent absorption function.

  Hereinafter, the present invention will be described in more detail based on the embodiments shown in the drawings. FIG. 1 is an external perspective view according to an embodiment of the present invention, FIG. 2 is a perspective view in which a fabric and a skin material are partially cut away, and FIG. 3 is a back frame and a cushion frame. It is a perspective view which shows the structure of the metal spring frame which does. In the present embodiment, a seat structure for two persons is shown in which two sets of the seat back part A and the seat cushion part B are supported on a set of frame support bases 10.

The frame support base 10 is installed on the floor of a vehicle or an aircraft. In this embodiment, it has the leg part 11 fixed to a floor etc., and the support frame 12 installed in the predetermined height from a floor surface by this leg part 11. As shown in FIG. As shown in FIG. 3, the support frame 12 further includes a cushion frame support part 121 and a back frame support part 122 . The cushion frame support part 121 includes three depth direction frames 121a arranged substantially in parallel with a predetermined interval, and a width direction frame 121b spanned between the front ends and the rear ends of the depth direction frame 121a. And is formed in a substantially rectangular shape. The back frame support 122 includes a vertical frame 122a that is connected to the rear end of each of the depth direction frames 121a and rises at an angle of approximately 90 to 120 degrees with respect to the depth direction frame 121a. The vertical frame 122a is set with a rising height that is approximately ¼ to half of the back frame 20. The vertical frame 122a is formed in a hollow cylindrical shape, and is formed so that the armrest 130 can be accommodated therein. The frame support base 10 may be one in which the legs 11 are fixed to the floor surface, or may be one that is rotatably or movably attached to the floor surface.

  The back frame 20 of the seat back portion A includes a metal spring frame 21 and a resin frame 22. The metal spring frame 21 is supported by the back frame support part 122 of the frame support base 10. The metal spring frame 21 is formed by processing a metal rod-shaped spring material as shown in FIGS. 2 to 6. In this embodiment, the metal spring frame 21 is formed between the side frame 211 and the vicinity of the upper end of the side frame 211. Are formed in a substantially rectangular shape including an upper edge frame 212 located at the lower end of the side frame 211 and a lower edge frame 213 located near the lower end portion of the side frame 211. A back frame connecting member 214 is stretched between the side frames 211 at a position slightly above the lower edge frame 213, and each end of the back frame connecting member 214 is in the vertical direction of the back frame supporting portion 122. It is connected and supported near the upper part of the frame 122a. The metal spring frame 21 formed in a substantially square shape performs a function of exerting a sense of stroke when seated by bending in the front-rear direction as described later, and functions such as vibration absorption characteristics. In order to exhibit the above, it is preferable to use the metal spring frame 21 having a spring constant in the bending direction of 10 to 40 N / mm.

  As shown in FIG. 6, the resin frame 22 can cover at least the surface side of the metal spring frame 21 and has side portions 221 to 221 having a width wider than the diameter of the metal spring frame 21. 224. In the present embodiment, the side portions 221 and 222 corresponding to the side frames 211 of the metal spring frame 21, the side portion 223 corresponding to the upper edge frame 212, and the side portion 224 corresponding to the lower edge frame 213, It is formed in the substantially square shape provided with.

  The thickness of each side portion 221 to 224 is arbitrary, but each side portion 221 to 224 preferably has a spring constant in the range of 5 to 40 N / mm when bent in the thickness direction. A fabric 40 is stretched on the resin frame 22. When the weight is applied to the fabric 40 and the spring constant is within this range, the bending or deformation at the time of sitting and absorbing vibration is within an appropriate range. Thus, it is possible to improve the feeling of stroke and improve the vibration absorption characteristics when sitting. Further, when the side portions 221 to 224 are in contact with a person's back via the fabric 40, the width of each side portion 221 to 224 is prevented so that the corners of the inner peripheral edges 221a to 224a do not act as a feeling of contact or a foreign object. As shown in FIG. 7, it is preferable to have a curved surface 230 that is bent from the front side to the back side from the middle part in the direction to the inner peripheral edges 221 a to 224 a. Since the fabric 40 is deformed along the curved surface 230, there is no sense of foreign matter on the back.

  An engagement claw portion 224b having a substantially U-shaped cross section is provided on the inner peripheral edge 224a of the side portion 224 positioned on the lower side, and the engagement claw portion 224b is provided with a metal spring frame. 21 is engaged with the upper edge portion of the back frame connecting member 214 provided on the head 21 (see FIG. 2). Engaged portions 221b and 222b with which both end portions of the back frame connecting member 214 are engaged are formed on the outer edge portions on the lower side of the side portions 221 and 222 located on both sides. Further, an engagement protrusion 212 a protruding upward at the center of the upper edge frame 212 of the metal spring frame 21 is engaged with the back side of the side portion 223 located above the resin frame 22. . Thereby, the resin frame 22 is attached so as to cover the surface side of the metal spring frame 21.

  The cloth 40 may be a cloth material, a net material, or the like that is stretched on the resin frame 22 and can receive a human load. However, the cloth 40 preferably has elasticity, and is a three-dimensional solid knitted fabric or an elastic material. It is preferably formed from a two-dimensional net material formed including a yarn. The fabric 40 made of a two-dimensional net material, a three-dimensional solid knitted fabric or the like is preferably stretched on the resin frame 22 with a low tension of 0 to 5%.

  There are various means for tensioning the fabric 40 on the resin frame 22, and examples thereof will be described with reference to FIGS. In FIG. 8, the resin frame 22 is composed of two members, a lower frame 22a and an upper frame 22b, the fabric 40 is put into a mold, a synthetic resin material is injected, and the upper frame 22b and the periphery of the fabric 40 are integrated. It is a means that is molded and then fixed to the lower frame 22a using means such as welding and adhesion. In FIG. 9, the lower frame 22a and the upper frame 22b are molded separately, and the periphery of the fabric 40 is sandwiched between them, and the space between the upper frame 22b and the fabric 40 is welded between the fabric 40 and the lower frame 22a. , Means fixed by bonding or the like. In FIG. 10, a hook member 40 a made of synthetic resin is attached to the peripheral edge of the fabric 40 by sewing or the like, and the hook member 40 a is engaged with a projecting piece 240 protruding from the outer peripheral edge of each side portion 221 to 224 of the resin frame 22. It is a means to stretch by doing.

  The resin frame 22 can also be integrally molded by disposing the fabric 40 in the mold and injecting synthetic resin. 11 and 12 show an example. As shown in FIG. 11, first, a lower mold 500 having a rounded corner portion 501 is used, and the fabric 40 is disposed along the corner portion 501 so that the upper frame 22a is located closer to the human body. An upper mold 510 having an inner surface shape corresponding to the shape is set and a synthetic resin is injected. Thereby, the upper frame 22a having a substantially L-shaped cross section is formed along the fabric 40 (see FIG. 12A). Next, using a lower mold 520 having an outer surface corresponding to the lower frame 22b, a synthetic resin is injected between the fabric 40 and the lower mold 520 to form the lower frame 22b. Finally, surplus portions and burrs of the fabric 40 are cut off. As a result, the resin frame 22 is integrally attached around the fabric 40 (see FIG. 12B).

  The skin material 50 is covered so as to cover the surface of the fabric 40 attached to the resin frame 22 as described above. As the skin material 50, leather, a three-dimensional solid knitted fabric or the like is used, but is not limited at all.

  As shown in FIG. 14, the cushion frame 30 constituting the seat cushion portion B is also configured to include a metal spring frame 31 and a resin frame 32, as with the back frame 20. The metal spring frame 31 is formed in a substantially square shape as shown in FIGS. 13 and 14. Among them, the front edge frame 311 is fixed to the width direction frame 121b located on the front edge side constituting the cushion frame support portion 121 of the frame support base 10 via the mounting bracket 330 (see FIGS. 2 and 3). . The side frames 312 and 313 and the rear edge frame 314 of the metal spring frame 31 are not fixed to the cushion frame support 121 (see FIG. 3). For this reason, when a load is applied, a portion of the side frames 312 and 313 near the rear edge frame 314 is bent due to its elasticity. The metal spring frame 31 of the cushion frame 30 has a bending constant spring constant of 40 to 80 N / mm so that the metal spring frame 31 exhibits functions such as a stroke feeling due to bending and vibration absorption characteristics. It is preferable to use a range

  A resin frame 32 having side portions 321 to 324 covering the metal spring frame 31 is disposed on the surface side of the metal spring frame 31. The front edge side 321 of the resin frame 32 is formed with a curved portion 321a that covers the front side of the mounting bracket 330 of the metal spring frame 31, and the curved portion 321a is made of urethane that softens the feeling of hitting the back of the knee. The pad material 340 is provided. The thickness of each of the side portions 321 to 324 is arbitrary, but each side portion 321 to 324 is bent in the thickness direction so that the bending or deformation at the time of sitting and vibration absorption is within an appropriate range. The spring constant is preferably in the range of 20 to 80 N / mm.

  Then, a fabric 60 for a seat cushion made of a two-dimensional net material, a three-dimensional solid knitted fabric or the like is stretched on the resin frame 32, and further, a sheet made of leather, a three-dimensional solid knitted fabric or the like so as to cover the cloth 60 A skin material 70 for the cushion portion is provided.

  As shown in FIG. 15, it is preferable that the curved surface 350 be formed near the inner peripheral edge of each of the side portions 321 to 324 of the resin frame 32 as in the case of the resin frame 22 for the back frame 20 described above. Further, the means for tensioning the fabric 60 on the resin frame 32 is the same as that for the back frame 20 (see FIGS. 8 to 12).

  Next, the operation of the seat structure according to this embodiment will be described. As shown in FIG. 16, when a person is seated from the no-load state of (a) as shown in (b), the back frame 20 is displaced backward, and the cushion frame 30 is displaced downward. When this is indicated by a thin line in a no-load state and a thick line in a state where a load is applied, these are as shown in FIGS. 17 (a) and 17 (b). FIG. 17B mainly shows the movement of the metal spring frame 21 of the back frame 20 and the movement of the metal spring frame 31 of the cushion frame 30. Further, when vibration is input, the back frame 20 moves back and forth and the cushion frame 30 moves up and down between the thin line and the thick line shown in these drawings.

  FIG. 18 and FIG. 19 show this movement in more detail. First, FIG. 18 shows the movement of the back frame 20. That is, when a person is seated, the fabric 40 is pressed rearward around the center together with the skin material 50 constituting the seat back portion A. When the fabric 40 is pressed rearward so as to be drawn near the center, the fabric 40 is pulled by this, and the portions near the inner peripheral edges 221a to 224a of the wide side portions 221 to 224 of the resin frame 22 are bent backward. When a further load is applied, the metal spring frame 21 starts to deform backward. As a result, different forces that support the spine act in multiple stages. In particular, at the stage where the bending of the resin frame 22 and the bending of the metal spring frame 21 act together, the combined spring constant is smaller than the single spring constant, so that the spring feeling changes softly. As a result, even if the amount of change from the start of seating to the equilibrium point is small, the person feels a large stroke. In addition, when external vibration is input, the vibration is absorbed particularly by the metal spring frame 21 moving back and forth. In addition, in a state where the body weight is applied to the rear in an effort to take a resting posture, the elasticity of the metal spring frame 21 and the resin frame 22 acts together, the spring feeling is soft, and the inclination angle is limited. Can also relax.

  The cushion frame 30 is also the same. As shown in FIG. 19, first, when a person sits down, the center of the fabric 60 is pressed through the skin material 70 so as to be pulled, and the resin is used as a trigger. The portions near the inner peripheral edges 321a to 324a of the wide side portions 321 to 324 of the frame 32 are bent downward. When a further load is applied, the metal spring frame 31 has the leading edge frame 311 fixed thereto, so that the portion of the side frames 312 and 313 near the trailing edge frame 314 bends downward due to its elasticity. Also in this case, similar to the action of the back frame 20, elastic forces having different spring constants are applied in a plurality of stages, so that a greater stroke feeling is felt even if the amount of fluctuation is small. When external vibration is input, the portion of the side frames 312 and 313 near the rear edge frame 314 is displaced up and down to absorb the vibration.

  As described above, according to the present embodiment, by combining a metal spring frame and a resin frame, the resin frame and the metal spring frame are bent using the deformation of the fabric stretched on them as a trigger. ing. Therefore, even if the thickness of the fabric and the skin material is thin, the two flexures of the resin frame and the metal spring frame can be used, so that a sufficient stroke feeling can be obtained and the installation space such as an aircraft can be used in a limited place. Suitable for

FIG. 1 is an external perspective view showing a seat structure according to an embodiment of the present invention. FIG. 2 is a perspective view in which a part of the fabric and the skin material is cut away. FIG. 3 is a perspective view showing a structure of a metal spring frame constituting the back frame and the cushion frame. FIG. 4 is a side view showing the positional relationship between the front seat and the rear seat. FIGS. 5A and 5B are a front view and a side view showing a metal spring frame of the back frame. FIG. 6 is a diagram illustrating a back frame, a fabric, and a skin material. FIG. 7 is a view for explaining a preferable example of the resin frame in the back frame. FIG. 8 is a diagram for explaining an example of means for fixing the fabric to the resin frame. FIG. 9 is a diagram for explaining another example of means for fixing a fabric to a resin frame. FIG. 10 is a diagram for explaining still another example of means for fixing a fabric to a resin frame. FIG. 11 is a view for explaining means for integrating the resin frame and the fabric by injection molding. 12A shows a state in which only the upper frame is fixed to the fabric in FIG. 11, and FIG. 12B shows a state in which the upper frame and the lower frame are fixed to the fabric in FIG. 13A, 13B, and 13C are a perspective view, a plan view, and a side view showing a metal spring frame of the cushion frame. FIG. 14 is a diagram illustrating a cushion frame, a fabric, and a skin material. FIG. 15 is a view for explaining a preferable example of the resin frame in the cushion frame. FIGS. 16A and 16B are diagrams for explaining the operation of the embodiment. FIG. 16A shows a state before sitting, and FIG. 16B shows a state when sitting. FIG. 17 is a view for explaining the operation of the above embodiment, (a) is a view showing the movement before and after the person is seated, and (b) is the movement of the metal spring frame. It is the figure shown to the center. FIG. 18 is a view for explaining the operation of the metal spring frame, the resin frame, and the fabric constituting the back frame. FIG. 19 is a diagram for explaining the operation of the metal spring frame, the resin frame, and the fabric constituting the cushion frame.

Explanation of symbols

A Seat back part B Seat cushion part 10 Frame support base 20 Back frame 21 Metal spring frame 211 Side frame 212 Upper edge frame 213 Lower edge frame 22 Resin frame 221 to 224 Side part 30 Cushion frame 31 Metal spring frame 311 Front Edge frame 312,313 Side frame 314 Trailing edge frame 321-324 Side 32 Resin frame 40 Fabric 50 Skin material 60 Fabric 70 Skin material

Claims (8)

Back frame and cushion frame,
A metal spring frame formed of a metal spring material and provided with a pair of side frames positioned at a predetermined interval and an edge frame positioned between at least one end of each side frame;
A resin frame formed of a synthetic resin, covering at least the surface side of the metal spring frame, and having a side portion having a width wider than the diameter of the metal spring frame;
The back frame and the cushion frame are supported by a frame support base having a back frame support portion located on both sides of the back frame and a cushion frame support portion located on the lower side of the cushion frame,
The metal spring frame for the back frame includes an upper edge frame as the edge frame located between the vicinity of the upper ends of the side frames, and the metal spring for the back frame is provided on the back frame support portion. The side frames of the frame are connected, and the portion located above the connecting portion is attached so as to be movable in the front-rear direction by the elastic force of the metal spring frame,
The metal spring frame for the cushion frame includes a front edge frame as the edge frame located between the vicinity of the front end portions of the side frames, and the front edge frame is attached to the cushion frame support portion. The edge side is supported so that it can move up and down,
And,
A seat structure in which a fabric is stretched between each side portion of each resin frame of the back frame and the cushion frame . Seat structure according to claim 1, wherein said metal spring frame for the back frame, the bending direction of the spring constant in the range of 10~40N / mm. The seat structure according to claim 1 or 2, wherein the metal spring frame for the cushion frame has a spring constant in a bending direction in a range of 40 to 80 N / mm. The resin frame for the back frame, according to claim 1 to 3, the spring constant at the time of bending in the thickness direction of each side portion is characterized in that it is formed to be in the range of 5~40N / mm The seat structure according to any one of the above. Resin frame for the cushion frame, of claims 1 to 4, the spring constant at the time of bending in the thickness direction of each side portion is characterized in that it is formed to be in the range of 20~80N / mm The seat structure according to any one of the above. The fabric, the resin frame for resin frame and cushion frame for the back frame, respectively, according to any one of claims 1 to 5, characterized in that it is stretched at a tension of elongation 0-5% Seat structure. The seat structure according to any one of claims 1 to 6, wherein the fabric is made of a three-dimensional solid knitted fabric or a two-dimensional net material. Each side portion of the resin frame has a curved surface that is bent from the front surface side to the back surface side from the middle in the width direction to the inner periphery, and the fabric is hung on the surface side of each side portion of the resin frame. The seat structure according to any one of claims 1 to 7, wherein the seat structure is passed.

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