JP2014023593A - Legless chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a legless chair which is comfortable to sit on by efficiently distributing the body pressure of a seated person to a seat and a backrest and to easily manufacture and provide the legless chair according to the figure of each individual seated person.SOLUTION: In the present invention, an internal cushion member for the back of the legless chair comprises at least a seat surface receiving the hip of the seated person and a back surface receiving the back of the seated person other than the waist and the shoulders of the seated person, and is composed of a pair of cushion members for avoiding the backbone which are each arranged so as to be extended parallel to the backbone at an interval on the right and left of the backbone of the seated person when the back of the seated person is abutted on the internal cushion member for the back of the legless chair, and a bridge cushion member receiving the back which is interposed between the pair of cushion members for avoiding the backbone and the back of the seated person and is arranged so as to be bridged between the cushion members for avoiding the backbone on the pair of cushion members for avoiding the backbone.

Description

  The present invention relates to a cushion member for a seat chair and a manufacturing method thereof, and a seat chair using the cushion member and a manufacturing method thereof.

The seat chair supports the body pressure of the seated person sitting on the seat chair by the seat portion and the back portion that receives the upper body of the seat (that is, the waist, back and shoulders of the seat), In general, the entire surface of the seating surface portion is formed in one plane, and the receiving surface of the backrest portion is also formed in a single plate shape in which the entire receiving surface is one plane.
In addition, regarding the arrangement structure of the cushioning material for the seat surface and the backrest, how can the body pressure of the buttocks or the body pressure of the upper body be simply changed between one plane of the seat and one plane of the backrest? It did not exceed the design philosophy of mitigating.

For this reason, for example, for reducing the body pressure of the seating surface portion, a material formed in a single plane covering the entire surface of the seating surface and various cushioning materials having different cushioning properties are used simply and planarly. It was only possible to reduce the body pressure by simply combining the flat cushioning material, the thickness and the lamination.
In addition, as for the back part that receives the upper body, the entire receiving surface that receives the upper body from the waist to the shoulder was regarded as one simple single plate-like flat surface. The flat cushion members were merely laminated in a flat manner over the entire back side of the upper body from the back side, that is, the waist to the shoulder.

  On the other hand, in some seats, there are products with complementary shapes that match the shape of the surface side of the seat part and the surface side of the backrest part with the surface shape of all or part of the body part that hits the face, These complementary shapes are also merely formed by integrally molding the surface of the cushioning material laminated in a planar manner on the entire surface of the part into a required concavo-convex curved surface by injection molding means or the like.

  Moreover, in the conventional seats as described above, the viewpoint of improving the seating comfort of the occupant is focused solely on the material of the cushioning material and its flat laminated structure, The focus on improving the child's skeletal structure was quite thin.

The present invention is to improve the sitting comfort of the seat, and to improve the skeletal structure of the seat chair, or to improve the sitting structure of the seat, the seat that receives the buttocks of the seat, and the waist, back and shoulders of the upper body of the seat By devising a three-dimensional arrangement structure, that is, a three-dimensional arrangement, rather than a simple planar stacking, that is, a two-dimensional arrangement, of an internal cushion member provided at least in the back part that receives the back part, The purpose of this invention is to provide a seat chair that disperses the body pressure of the seated person from the viewpoint and has a comfortable seating comfort.

  In addition, in conventional integral molding such as simple flat lamination of cushion materials and injection molding of the surface uneven surface of the front side cushion material, individual seats having different body shapes and physiques (hereinafter also simply referred to as physiques) Although it was almost impossible to provide a comfortable sitting chair adapted to the user, the material, size and form of the cushioning material, or cushioning performance (hereinafter also simply referred to as cushioning performance) in the manufacturing process It is also an object of the present invention to provide a seat chair that can be easily changed according to the physique of the seat and can be easily manufactured according to the physical characteristics of the individual seat.

The present invention has been made in order to achieve the above object, and the seat frame that constitutes the skeletal component frame of the backrest has a new swing structure that is not conventional, or that is interposed between the skeleton component frame of the seat and the chair. Effectively disperse the occupant's body pressure to the back of the seat and backrest by changing the shape and arrangement of the cushion for the inside of the face and the cushion for the inside of the back to a new three-dimensional structure. Thus, it is possible to provide a comfortable seat chair and to easily manufacture a seat chair according to the physique of each individual seat.

The seat chair back portion internal cushion member according to claim 1 is provided with at least a seat surface portion for receiving the buttock of the stool and a back surface portion for receiving the back portion of the lumbar portion, the back portion, and the shoulder portion of the occupant. The cushion member provided inside the back part of
A pair of spine avoidance cushion members arranged separately to extend in parallel to the spine with a space on the left and right of the spine of the seat when the back of the seat is abutted;
The pair of spine avoidance cushion members are interposed between the pair of spine avoidance cushion members and disposed on the pair of spine avoidance cushion members so as to span the spine avoidance cushion members. It is characterized by comprising a bridging cushion member.

  According to a second aspect of the present invention, in the seat back portion internal cushion member according to the first aspect, the spine avoidance cushion member has a quadrangular prism shape.

  According to a third aspect of the present invention, in the cushion member for the back part of the back of the seat according to the first aspect, the thickness of the backbone avoidance cushion member increases from the vicinity of the center in the extending direction of the member toward the upper end side of the rear part. It is characterized by a tapering shape that gradually decreases.

  According to a fourth aspect of the present invention, in the seat back portion cushioning member according to the first aspect, the spine avoidance cushion member has a thickness from the vicinity of the center in the extending direction of the member toward the upper end side of the rear portion. The upper end side is formed in a substantially right triangle shape in a side view so as to gradually decrease toward the bridging cushion member side.

  The invention according to claim 5 is the cushion member for the back part of the seat back according to claim 1, wherein the spine avoidance cushion member has a thickness from the vicinity of the center in the extending direction of the member toward the upper end side of the back part. The upper end side has an isosceles triangle shape in a side view so as to gradually decrease.

  The invention according to claim 6 is the cushion member for the back part of the seat back according to any one of claims 1 to 5, wherein the bridging cushion member is flat.

  The invention according to claim 7 is the cushion member for the back part of the seat back according to any one of claims 1 to 6, and is surrounded by a pair of backbone avoidance cushion members and a bridging cushion member, and the bridging A spine avoidance space is formed on the back side of the cushion member in the extending direction of the spine of the occupant.

  The invention according to claim 8 is the cushion member for the back part of the seat back of claim 7, wherein the backing cushion member is surrounded by a pair of spine avoidance cushion members and a bridging cushion member, and is U-shaped in cross section. It is characterized by being provided so as to stretch between the left and right spine avoidance cushion members so as to close the open side of the U-shape of the formed spine avoidance space.

According to a ninth aspect of the present invention, in the seat back portion internal cushion member according to any one of the first to eighth aspects, the pair of backbone avoidance cushion members and the bridging cushion member are integrated by bonding. It is characterized by that.

A tenth aspect of the present invention is the seat cushion back portion internal cushion member according to any one of the first to eighth aspects, wherein the pair of spine avoidance cushion members, the bridging cushion member, and the one member are integrally formed by shaping from one member. It is formed.

According to an eleventh aspect of the present invention, in the cushion member for the back part of the seat back of the eighth aspect, the pair of spine avoidance cushion members, the bridging cushion member, and the backing cushion member are integrated by bonding to each other. Features.

According to a twelfth aspect of the present invention, the cushioning performance of the backing cushion member is different from the cushioning performance of the pair of backbone avoidance cushioning members and / or the spanning cushioning member. It is characterized by that.

In the invention of the seat cushion back portion internal cushion member according to claim 13, the cushion performance of the backing cushion member is different from the cushion performance of the pair of spine avoidance cushion members and / or the spanning cushion members. Thus, the cushion performance as the whole cushion member for the back part of the seat back of claim 8 is set as an arbitrary performance.

  According to a fourteenth aspect of the present invention, there is provided a seat frame constituting frame that constitutes a skeleton of a seat surface portion that receives a buttock of a stool, and a skeleton of a back surface portion that receives a back portion of a lumbar portion, a back portion, and a shoulder portion of the occupant. The seat back part internal cushion member according to any one of claims 1 to 13 is provided in the back part constituent frame of a seat chair provided with a back part constituent frame. And

  The invention of the seat chair according to claim 15 is a frame of the seat surface portion constituting the skeleton of the seat surface portion that receives the buttocks of the occupant, and the skeleton of the back portion that receives the back portion of the lumbar portion, the back portion, and the shoulder portion of the seat seat. A rear portion constituting frame, wherein the rear portion constituting frame is formed on the upper body side of the occupant with an axis passing in a horizontal direction in a frame surface formed by the rear portion constituting frame as a swing axis. The cushion member for the back part of the seat back part according to any one of claims 1 to 13, wherein the back part constituting frame of the seat chair is configured to swing freely according to bending and stretching movements in the front-rear direction. Is provided.

  According to a sixteenth aspect of the present invention, in the seat of the fifteenth aspect, the swing of the rear surface portion constituting frame is caused by the frame surface portion on the upper portion side and the lower portion side on the frame surface of the rear portion constituting frame. It is characterized in that the frame surface is a movement that tries to stop at a tilt according to the pressure difference with the frame surface portion.

According to a seventeenth aspect of the present invention, in the seating chair according to the fifteenth or sixteenth aspect, the frame surface of the rear constituting frame has a substantially long rectangular shape that is long in the left-right direction of the occupant.

  The invention according to claim 18 is the seat chair according to any one of claims 15 to 17, wherein the back surface portion is configured to be able to come into surface contact with at least the back portion of the occupant when the back surface component frame swings. It is characterized by that.

  According to a nineteenth aspect of the present invention, in the seating chair according to any one of the fifteenth to eighteenth aspects, the vertical length of the frame surface of the frame constituting the back portion is such that the inclination angle of the upper body of the seat is about 125 degrees. In the sitting posture, the length of the spine of the occupant from the eighth or ninth thoracic vertebra to the fourth lumbar vertebra is characterized.

  The invention of claim 20 is characterized in that, in the seating chair according to any one of claims 15 to 19, the setting position of the swing shaft is within the range in the height direction of the waist of the seated person. To do.

  According to a twenty-first aspect of the present invention, in the seating chair according to any one of the fifteenth to twentieth aspects, the height setting position of the swing shaft is a sitting posture in which the inclination angle of the upper body of the seat is about 125 degrees. In the height direction of the third to fifth lumbar vertebrae of the seat.

  According to a twenty-second aspect of the present invention, in the seat chair according to any one of the fifteenth to twenty-first aspects, the tilt angle of the upper body of the occupant is about 125 degrees in the longitudinal setting position of the swing chair. The sitting posture is characterized in that the swing axis is located on a perpendicular line passing through the sixth to seventh thoracic vertebrae of the spine of the occupant.

  According to a twenty-third aspect of the present invention, in the seating chair according to any one of the fifteenth to twenty-second aspects, the setting position of the swing shaft in the frame surface is the vertical direction of the frame surface formed by the back surface constituting frame. In this case, the length in the upper side direction is set to be longer than the length in the lower side direction than the shaft.

  According to a twenty-fourth aspect of the present invention, in the seating chair according to any one of the fifteenth to twenty-third aspects, the setting position of the swing shaft in the frame surface is lower than the shaft in the vertical direction of the back surface component frame. It is characterized in that the ratio between the direction length and the length in the upper side direction is set at a position that can be divided into about 1: 3.

  According to a twenty-fifth aspect of the present invention, in the seating chair according to any one of the fifteenth to twenty-fourth aspects, at least the swinging range of the back portion constituting frame is such that the occupant floats the buttocks from the seating surface of the seating surface portion. When the back part is fully extended rearward, the back part is in a range that can be tilted with the back part in surface contact with the back part of the seat.

The invention of claim 26 is the seat chair according to any one of claims 15 to 25, wherein the back surface constituting frame is a substantially long rectangular frame that forms the outer peripheral edge of the back surface, It has a rocking shaft on the left and right outside of the frame.

According to a twenty-seventh aspect of the present invention, in the seating chair according to any one of the fifteenth to twenty-sixth aspects, the back portion constituting frame is a substantially long rectangular frame, and the frame is horizontally and horizontally oriented. It has a shaft body as an extending swing shaft.

The invention according to claim 28 is the seating chair according to any one of claims 15 to 27, wherein the back surface constituting frame is configured such that both ends of the swing shaft of the back surface constituting frame are on the left and right sides of the seating surface constituting frame. It is characterized in that it is pivotally supported by a pair of left and right rear surface support frames that are tiltably coupled to both end sides via reclining gears.

The invention according to claim 29 is the seat chair according to claim 28, wherein the back support frame is provided at a position separated rearward from the waist so as not to receive direct pressure on the waist of the seated person. .

  According to a thirty-third aspect of the present invention, in the seating chair according to the twenty-eighth or the twenty-ninth aspect, the pair of left and right rear surface support frames are integrally configured by a frame member that couples the two rear surface support frames. It is characterized by.

The invention of claim 31 is the seat chair according to any one of claims 14 to 30,
The cushion member for the seat surface portion inside provided in the seat surface portion is
A seating surface base cushion member formed in a size covering the frame surface of the seating surface portion constituting frame;
A pair of buttocks rear end receiving cushion members disposed on the rear edge side of the seating surface base cushion member and spaced from each other on the right and left rear end side of the occupant's buttocks; and
A thigh cushion member disposed on a front end edge side of the seat surface base cushion member and receiving a pressure of a thigh of a seated person.

According to a thirty-second aspect of the invention, in the seating chair of the thirty-first aspect, the seat position of the buttocks is determined by the three members of the pair of buttocks rear end receiving cushion members and thigh cushion members provided on the seat base cushion member. It is characterized by being arranged in.

The invention of claim 33 is the seat chair according to claim 31 or claim 32, wherein the buttocks rear end receiving cushion member has a quadrangular prism shape extending in the left-right direction of the seat surface portion. To do.

The invention of claim 34 is the seat chair according to any of claims 31 to 33, wherein the thigh cushion member is a single member having a quadrangular cross section extending in the left-right direction of the seat surface portion. It is characterized by.

According to a thirty-fifth aspect of the present invention, in the seating chair according to any of the thirty-first to thirty-fourth aspects, four members including a seating surface base cushion member, a pair of buttocks rear end receiving cushion members, and a thigh cushion member are provided. It is characterized by being integrally formed so that it can be handled as a single unit.

The invention according to claim 36 is the seat chair according to any one of claims 31 to 35, wherein the seat surface portion internal cushion member is mounted on the seat surface portion constituting frame. A pair of buttocks rear end receiving cushion members and thigh cushion members are disposed on the seat surface base cushion member, and are provided inside the seat surface portion.

The invention according to claim 37 is the seat chair according to any of claims 31 to 35, wherein the cushioning member for the seating surface portion includes a pair of buttocks rear end receiving cushion members and thigh cushion members. It is mounted on the seat surface portion constituting frame, and is provided inside the seat surface portion in a state where the seat surface base cushion member is disposed on the buttocks rear end receiving cushion member and the thigh cushion member. To do.

  According to a thirty-eighth aspect of the present invention, in the seat chair manufacturing method according to any one of the fourteenth to thirty-seventh aspects, the constituent members of the back portion internal cushion member are preliminarily provided for each different size and different cushion performance. It is characterized in that a cushion member for the inside of the back surface portion is configured that is optimally selected for the planned seated person.

  The invention of claim 39 is the seat chair manufacturing method according to any one of claims 14 to 37, wherein each constituent member of the cushion member for the seat surface portion is preliminarily provided for each different size and different cushion performance. It is characterized in that the cushion member for the interior of the seating surface part is configured that is optimally selected for the planned seated person and is appropriately selected according to the planned size of the seated person.

  The invention of claim 40 is the seat chair manufacturing method according to any one of claims 14 to 37, wherein the constituent members of the back surface cushion member and the seat surface portion internal cushion member have different dimension sizes in advance. Molded for each and different cushion performances, and appropriately selected according to the planned occupant's physique, and constitutes a back surface cushion member and a seat surface portion internal cushion member that are optimal for the planned occupant It is characterized by that.

  According to each of the inventions of claims 1 to 14, in the back portion internal cushion member configured inside the back portion as the back portion against which the back (back portion) of the seat is abutted, the back portion of the seat A space area for avoiding the spine for avoiding the pressure of the spine is provided between the spine avoidance cushion members by a pair of spine avoidance cushion members inside the back face portion where the spine of the seated person hits the back face portion. Therefore, the contact of the back surface with the spine can be eased, and the back body pressure can be efficiently dispersed by the left and right spine avoidance cushion members.

According to each of the inventions of claims 1 to 40, all of the configurations of the cushion member for the back portion inside as a cushioning material interposed between the seat and the skeleton constituting frame of the sitting chair are new to the prior art. The structure based on a new conception, that is, the structure provided with the space area for avoiding the spine, the body pressure of the seated person can be efficiently distributed between the seat part and the back part of the backrest part. A good seat can be provided.

  According to the first and sixth aspects of the present invention, since the spine avoidance cushion member indirectly abuts against the seated person's body via the bridging cushion member, the existence of the spine avoidance cushion member is a flat bridging. The cushion member is gently relaxed, and a comfortable touch can be produced.

  According to each invention of Claim 3 and Claim 6, since the thickness of the spine avoidance cushion member is gradually reduced toward the upper end side of the back surface portion, the upper body of the occupant at the reduced portion (inclined surface). It is possible to prevent the slippage of the back (in particular, the back, neck and head).

According to each of the inventions cited in claim 15, since the back surface portion that oscillates according to the body pressure of the upper body can sufficiently receive the body pressure, The applied body pressure can be distributed to the back surface portion, and as a whole, a comfortable seat can be provided.

According to the eighth to thirteenth inventions, the back surface finally selected for the cushion performance of the selected specific spine avoidance cushion member, the bridging cushion member, or the cushion performance of a combination of these members. Depending on the selection of the cushion performance of the tension cushion member, the cushion performance as a whole of the cushion member for the back part of the seat back can be easily adjusted to any desired performance.

According to each of the inventions of claims 9 to 11 and claim 35, the rear portion internal cushion member and the seat surface internal cushion member having different shapes such as the cushion performance and the size are separately formed in advance ( By integrating the individual seats according to the body shape (height, weight, buttocks, spine size, etc.) of each individual Can be manufactured and provided.

According to each of the inventions of claims 15 to 40, the skeleton structure of the upper part of the occupant, that is, the back part that receives the lumbar part, the back part, and the shoulder part of the occupant, and the back part that receives only the back part of the upper part. And the back part constituting frame constituting the skeleton of the back part, the axis line passing in the left and right direction in the frame surface formed by the back part constituting frame as a swing axis, Since the back portion, that is, the back portion constituting frame freely swings according to the bending and stretching movement, the spine (always depending on the inclination of the upper body of the seat, that is, depending on the posture of the seat, (Spine) can be easily received in the natural S-shaped state with the cushioning member for the inner part of the back part, and the body pressure of the occupant can be efficiently distributed between the seat part and the back part of the backrest part. Good seat chair It can be.

  According to each of the sixteenth to eighteenth aspects of the present invention, in any inclination posture of the upper body of the seated person, that is, to any inclination angle change of the back portion, the back constituting frame corresponding to the back portion. Can smoothly follow and swing.

  According to each of the nineteenth to twenty-second aspects of the present invention, it is possible to provide a seat chair with the most comfortable seating when the inclination angle of the upper body of the seat is about 125 degrees.

  According to each of the inventions of claims 23 to 25, the back component frame corresponding to the back portion can be quickly followed and swung with respect to the quick tilting of the upper body of the seat.

  According to the invention of claim 30, for example, compared with the invention of claim 27, it is not necessary to provide a tangible shaft body as a swinging shaft in the rectangular frame-like frame. It is possible to reduce the weight of the seat, in particular, the weight of the back component frame and the labor and cost of manufacturing the seat.

  According to each of the inventions of claims 28 to 30, the back portion structure corresponding to the back portion, regardless of the angle of the back portion as the backrest portion with respect to the seat surface via the reclining gear. The frame can be smoothly and smoothly followed and swung, and the back component frame corresponding to the back can be quickly swung and swung with respect to the quick tilting of the upper body of the occupant.

  According to the invention of claim 29, for example, compared with the invention of claim 30, since there is no need to provide a frame member for connection, the omission of the frame component member, the weight reduction of the seat chair, and the configuration frame It is possible to reduce the weight and labor and cost of manufacturing a seat.

According to each of the inventions of claims 31 to 34, in any case, the sitting position on the front side of the buttocks in the seat surface portion is the ideal position of the seat surface portion in the seat chair (the body with the swingable back surface portion). It is possible to naturally guide to an ideal position in the relationship relating to pressure dispersion. That is, the front side of the buttocks of the seated person automatically guides the buttocks to the ideal sitting position at the front and left and right rear by means of the thigh cushion members and the left and right rear sides of the buttocks by the rear end receiving cushion members. be able to.

  According to the invention of the method for manufacturing a seat chair of claim 38, according to the order, the seat chair in which the cushion member for the back portion inside corresponding to the physique of the occupant is disposed on the back portion can be easily and quickly. Moreover, it can be provided at a low price.

  According to the invention of the seat chair manufacturing method of claim 39, according to the order, the seat chair in which the cushion member for the seat surface portion according to the physique of the seat is disposed on the seat surface portion can be easily and quickly. Moreover, it can be provided at a low price.

  According to the invention of the method for manufacturing a seat chair according to claim 40, the back portion internal cushion member and the seat surface internal cushion member corresponding to the physique of the seated person are arranged on the back portion and the seat surface portion according to the order. It is possible to provide the seated chair easily, quickly and inexpensively.

FIG. 1 is a left perspective view of a skeleton frame of a sitting chair. FIG. 2 is a longitudinal side view of the skeleton frame of the chair shown in FIG. FIG. 3 is an explanatory side view showing the tilted state of the back surface. FIG. 4 is a side view showing a state in which the upper end side of the rear surface portion is tilted rearward. FIG. 5 is an explanatory diagram for describing the actual dimensions of the skeleton frame in the longitudinal side view of FIG. FIG. 6 is an explanatory view showing a sitting state. FIG. 7 is an explanatory view of the arrangement of the cushion members in the sitting state. FIG. 8 is an explanatory view of the arrangement of the cushion member in a state in which the seat chair is developed 180 degrees. FIG. 9 is a perspective view of the back portion internal cushion member. FIG. 10 is an exploded perspective view of the back portion internal cushion member. FIG. 11 is a partial perspective view of the back portion internal cushion member. FIG. 9 is a perspective view of the back surface internal cushion member in a horizontal state. FIG. 13 is a perspective view of the cushion member for the seat surface portion inside. FIG. 14 is an exploded perspective view of the cushion member for the seat surface portion inside. FIG. 15 is an explanatory view of another arrangement of the cushion member in the seated state.

As a seat chair of the present invention, a so-called reclining seat chair in which a seat surface portion and a back surface portion can be tilted from a horizontal state to a substantially right angle state via a reclining gear is shown as an example of an embodiment.

1 to 5 are views showing a skeleton constituting frame constituting a skeleton of a reclining seat chair (hereinafter also simply referred to as a seat chair) shown as an embodiment. Hereinafter, a description will be given with reference to FIGS.

In FIG. 1, the illustrated seating chair includes a seating surface part constituting frame 10 constituting a skeleton of the seating surface part 1 that receives the buttock of the seated person, and the upper body of the seating person, that is, the waist part, the back part, the shoulder part, the neck part, and the head part. The back portion, preferably the back portion constituting frame 20 constituting the skeleton of the back portion 2 that receives only the back portion.
The back surface component frame 20 has a frame surface formed in a substantially long rectangular shape formed by the back surface component frame 20 in the left and right width direction of the seat chair (hereinafter also simply referred to as the left and right direction). When the axis S extending so as to pass is set as the swing shaft 21, the upper body side of the seat is moved in the front-rear direction of the chair, for example, when the back muscles are bent and stretched, etc. Accordingly, it is configured to follow freely and follow and swing according to the pressure of the back.

  Here, the swing of the back surface component frame 20 refers to the frame surface of the back surface component frame 20, in this embodiment, the frame surface formed into a substantially long square by the upper edge side frame member 22 and the lower edge side frame member 23. The frame surface portion above the swinging shaft 21 that forms the axis S, that is, the upper-side frame surface (the upper-side edge-side frame member 22) (the surface surrounded by the upper-end edge-side frame member 22 and the lower-end edge-side frame member 23). And the lower frame surface (the surface surrounded by the lower edge frame member 23) by the surface contact of the back of the seated person. It is a movement that pivots about the pivot shaft 21 as a pivot shaft in response to a pressure, that is, a pressure difference (hereinafter also referred to as a pressure difference), and tilts according to a certain state. beneath In equilibrium corresponding to the pressure receiving difference and frame surface undergoes a movement in which the frame surface is to rest.

Accordingly, the axis S (swinging shaft 21) is within the vertical distance between the upper edge side frame member 22 that forms the upper edge of the frame surface and the lower edge frame member 23 that forms the lower edge of the frame surface, that is, the frame. It is necessary to set within the frame surface in the sense that it is within the vertical interval of the surface. In short, when the upper end edge side frame member 22 moves rearward of the seat chair, the lower end edge side frame member 23 is It only has to be set to move forward.
Therefore, the axis S does not necessarily need to be positioned on the surface of the frame surface, and may be set at a position deviating from the thickness direction of the frame surface (thickness interval in the front-rear direction of the seat).

Further, in the embodiment, the frame surface of the rear surface configuration frame 20 has a substantially long rectangular shape that is long in the left-right direction of the seat, but this shape is not necessarily limited. For example, an elliptical shape, a round shape, etc. It may be. In the embodiment, two pipe frame members (upper edge side frame member 22 and lower edge side frame member 23) are used to surround the frame surface with a pipe frame, but some plate member is used. The frame surface may be formed in a flat plate shape.
The point is that the frame surface comes into surface contact with the back of the seated person so that the pressure (body pressure) of the back can be accurately received, and the back structure frame 20 can swing as described above. The back surface portion 2 may be configured so as to be able to come into surface contact with at least the back portion of the occupant in the swinging of the back surface configuration frame 20m. Whether it is configured is not necessarily an important factor.

The rear surface portion constituting frame 20 has a pair of left and right rear surface portions whose swing shafts 21, 21 are connected to reclining gears 11, 11 provided on both left and right end sides on the rear end side of the seat surface portion constituting frame 10. It is pivotally supported by the support frames 16 and 16, and can be tilted at least within a range of approximately 90 degrees where the rear surface component frame 20 rises at a substantially right angle from 180 degrees which is substantially in line with the seat surface component frame 10. It is configured.
In the drawing, the illustrated shape of the bearing portion of the oscillating shaft 21 is the same shape as the illustrated shape of the reclining gear 11, but the bearing portion of the oscillating shaft 21 is the reclining gear as is apparent from the above description of operation. It has no function and is just a bearing.

In this embodiment, the back support frames 16 and 16 are provided at positions separated from the back so as not to directly receive the body pressure (pressure) of the seated person sitting on the seat surface 1 so as not to receive the body pressure (pressure). The rear surface side of the seat surface portion constituting frame 10 is further extended rearward from the seat position of the seated person.
In order to integrate and reinforce the pair of left and right rear surface support frames 16, 16, in this embodiment, both the rear surface support frames 16, 16 are connected (welded) by the connection frame member 13 to be integrated. It is composed.

In order to smoothly follow the swing of the swing shaft 21 in accordance with the swing of the occupant's upper body (back), a set position within the frame surface of the swing shaft 21 is formed by the rear surface configuration frame 20. In the vertical direction of the frame surface, the upper side length is preferably set to be longer than the lower side length than the shaft 21. Ideally, the lower side length and the upper side length are It is optimal to set the position so that the ratio is substantially divided into 1: 3.
The swinging range of the back surface component frame 20 is such that at least when the occupant lifts the buttocks from the seat surface of the seat surface portion 1 and fully extends the back portion backward, the back surface portion 2 with respect to the back portion of the seat portion. It is preferable that the tilting range be in a state where the surface is in contact with the surface.

As described above, the back surface component frame 20 of the above embodiment is formed into a substantially long rectangular frame body that forms the outer peripheral edge of the back surface portion 2 with the upper edge frame member 22 and the lower edge frame member 23. The swinging shafts 21 and 21 are respectively provided on the left and right outer sides of the frame.
It is good also as a rocking | fluctuation axis | shaft (21) using the shaft body (not shown) which extends in the frame body on the rocking | fluctuation axis line S of the left-right horizontal direction.

In the explanatory view of the seating state shown in FIG.
The figure shows the height in a state where the seat chair is set at an inclination angle (tilt) in which the frame surface of the back surface configuration frame 20 is opened at about 125 degrees with respect to the seat surface (horizontal surface) of the seat surface configuration frame 10. An 169cm stool with the chin pulled out and the spine in a natural sigmoidal shape, showing an ideally stable posture, that is, sitting in the natural body. In this case, from the lower half of the thoracic vertebra to the upper part of the lumbar vertebra A straight line extending over the half is in a state substantially parallel to the frame surface.
In addition, the meaning of the number described along the spine in a figure is as follows.
That is, C1 to C7 are the first cervical vertebra to the seventh cervical vertebra, T1 to T12 are the first thoracic vertebra to the twelfth thoracic vertebra, L1 to L5 are the first lumbar vertebra to the fifth lumbar vertebra, and a relatively large bone below the fifth lumbar vertebra Is the sacrum (sacrum), and the relatively thin bone that follows the sacrum is the caudal vertebra (coccyx, so-called caudal bone), which forms the spine of the human body.

In this substantially parallel state, the upper edge (22) of the frame surface is positioned in parallel to the portion corresponding to the sixth thoracic vertebra of the occupant's thoracic vertebra, and the lower edge (23) of the frame surface is the fourth thoracic vertebra of the occupant. The vertical length of the frame surface, that is, the vertical width of the seat surface portion constituting frame 20 is set so as to be parallel to the portion corresponding to 21 is a length (upper end side length) reaching the upper end edge (22) side with a length (lower end side length) reaching the lower end edge (23) side being 1 in the vertical length of the frame surface. It is optimal to set 3).

In other words, the vertical length of the frame surface of the back surface portion 2 is the eighth or ninth position of the seat in the parallel positional relationship in the above-described seating posture in which the inclination angle of the upper body of the seat is about 125 degrees. It is optimal to make it correspond to the length from the thoracic vertebra to the fourth lumbar vertebra, and the setting position of the rocking shaft 21 is the height of the lumbar portion of the occupant in the sitting posture where the inclination angle of the upper body of the occupant is about 125 degrees. It is optimal to make it correspond to the direction range, more specifically, the height direction range of the third to fifth lumbar vertebrae of the seated person.
Further, the setting position of the swinging shaft 21 in the front-rear direction of the seat chair is positioned on a vertical line passing through the sixth to seventh thoracic vertebrae of the seat in the above-described sitting posture where the inclination angle of the upper body of the seat is about 125 degrees. Is the best.

The optimum specific dimensions of the seat-constituting frame, that is, the seat-surface-constituting frame 10 and the back-constituting-constituting frame 20 in the above-mentioned seating posture of about 169 cm are generally as follows.
That is, the length in the front-rear direction from the front end side of the seat-constituting frame 10 to the rotation axis of the reclining gear 11 on the rear end side is about 50 cm, and from the rotation axis of the reclining gear 11 to the back-side configuration frame 20. The length in the vertical direction to the upper end edge 22 side is about 40 cm, and the length from the pivot axis of the reclining gear 11 to the axis of the rocking shaft 21 of the rear portion constituting frame 20 is about 24 cm.

Therefore, the length from the axial center of the back surface constituting frame 20 swing shaft 21 to the upper end edge 22 side of the back surface constituting frame 20 is about 16 cm, and the lower end of the back portion constituting frame 20 from the shaft core of the swing shaft 21. The length to the edge 23 side is about 5 cm, and the length in the vertical direction from the upper end edge (22) to the lower end edge (23) of the back surface constituting frame 20 is about 21 cm.

The relationship between the constituent frame of the seat chair, that is, the back portion constituent frame 20 and the seat surface portion constituent frame 10 and the body (spine) of the seat, that is, as described above, the seat's spine has a natural S-shape. Relationship in which the linear line from the lower half of the thoracic vertebra to the upper half of the lumbar vertebra is substantially parallel to the frame surface when sitting in a naturally stable posture As a matter of course, the cushioning material interposed between the two must be taken into account, but no special device is required for the cushioning material. The relationship can be easily established.

Therefore, the above-mentioned relationship is that a conventional seat chair in which a very ordinary cushion material is normally used, that is, the back surface portion cannot swing unlike the present invention, and the inclination angle of the back surface portion is about 125, for example. It is possible to establish a seat chair that is fixed at a certain time (hereinafter also referred to as a back-side fixed seat chair), but in such a back-side fixed seat chair, the seated position of the seated person Depending on the situation, the substantially parallel state described above cannot be maintained.

On the other hand, in the present invention, as shown in the above embodiment, in the back surface portion 2 as the backrest portion, the back surface configuration frame 20 constituting the skeleton of the back surface portion has a swingable structure. No matter how the sitting posture of the occupant changes, the surface of the back part 2, that is, the frame surface of the back part constituting frame 20 is always in a state of being substantially parallel to the principal part (the straight line) of the occupant's spine. Can be maintained.

That is, in the support structure in which the seat chair having the seat surface portion 1 and the back surface portion 2 receives the body pressure of the occupant, the inclination angle of the occupant's upper body is determined in particular when the body pressure of the occupant's upper body is received. Regardless of the upper part of the occupant's upper body, a swingable back surface 2 is provided that can always receive only the back part in a substantially parallel state. Compared to the conventional seat chairs that receive, the back part 2 can receive more body pressure of the upper body in a comfortable posture, and the body pressure received by the seat part 1 can be greatly reduced, You can sit comfortably.

  Next, the cushion member for the interior of the seat surface portion of the seat chair (that is, the cushion material disposed on the seat surface portion configuration frame 10 and the back surface configuration frame 20 which are the constituent frames of the seat chair of the above-described embodiment) Cushion member for the interior of the seat surface, hereinafter referred to simply as the cushion member for the interior of the seat, and an internal cushion member for the back of the seat (ie, the cushion member for the interior of the back of the seat, hereinafter simply referred to as the back) (Also referred to as a part internal cushion member) will be described with reference to FIGS.

  First, the back portion internal cushion member 200 that is mounted on the back portion constituting frame 20 that constitutes the back portion frame that receives the back portion of the lumbar portion, the back portion, and the shoulder portion of the seat portion is in contact with the back portion of the seat portion. A pair of spine avoidance cushion members 24 and 25 separately disposed to extend in parallel with the spine at intervals on the left and right sides of the seat spine, and the pair of spine avoidance cushion members 24, 25 and the back of a seated person sitting on a sitting chair so as to be bridged between the spine avoidance cushion members 24, 25 on the pair of spine avoidance cushion members 24, 25. The bridge cushion member 26 is provided so as to be stretched and receive the back of the seated person.

  As the pair of spine avoidance cushion members 24 and 25, square pillar-shaped cushion members may be used over the entire length (see the two-dot chain line portion in FIG. 10). More specifically, so as to have a tapered shape in which the thickness gradually decreases from the vicinity of the center of the extending direction toward the upper end side of the back surface, that is, a shape in which the two-dot chain line portion of FIG. 10 is cut. The upper end side of the spine avoidance cushion member is formed in a substantially right triangle shape in a side view so that the thickness gradually decreases closer to the bridging cushion member 26 side (FIGS. 10 and 11).

Further, the tapered avoidance cushion members 24 and 25 are not limited to the embodiment shown in the drawings, and the thickness gradually decreases from the vicinity of the center in the extending direction of the members toward the upper end side of the back surface portion. The upper end side of the member may have an isosceles triangle shape (not shown) in a side view.
In addition, the shape of the above-mentioned bridging cushion member 26 does not have to be a correct flat plate shape, but may be a substantially flat plate shape with an appropriate thickness.

  In the back portion internal cushion member 200 shown in FIG. 11, it is surrounded by the pair of spine avoidance cushion members 24, 25 shaped as described above and the bridging cushion member 26, and the rear side of the bridging cushion member 26 The spine avoidance space H formed in the extending direction of the spine of the seated person is formed in a substantially U shape in the cross section.

The back portion internal cushion member 200 (hereinafter also referred to as a back portion internal cushion member in the first example) constituted by the pair of spine avoidance cushion members 24 and 25 and the bridging cushion member 26 is a pair of spine avoidance. The three members of the cushion members 24 and 25 and the bridging cushion member 26 are shaped as separate bodies, that is, as single bodies in advance, and these three members are bonded together with an appropriate adhesive when mounted on the rear surface configuration frame 20. And may be handled as a single unit (single unit), or may be previously integrated with three members bonded together with an adhesive (integral formation). In addition, you may form integrally by shaping from one member.

In either case where the three members constituting the back portion internal cushion member 200 are each set as a single body or are previously integrated with an adhesive or the like, the cushion of each member is previously stored. By changing the characteristics (repulsive force) and shape, in the case of a single unit, the back part with different cushioning performance can be selected by selecting the combination of members according to the physique of the user (seater). The internal cushion member 200 can be easily configured.
In addition, in the case of integration, the cushion member 200 for the inner part of the back part having different cushioning performance according to the physique of the planned user (seater) can be prepared in advance as a single item. The back-side internal cushion member 200 having a cushioning property according to the individual user's physique is selected according to the order, and a seat chair having an optimal cushioning property according to the physique of the individual occupant Can be provided quickly and easily.

On the other hand, the back portion internal cushion member 210 (hereinafter also referred to as the back portion internal cushion member in the second example) shown in FIG. A backing cushion member 201 is integrally provided so as to stretch between the left and right spine avoidance cushion members 24 and 25 so as to close the open side of the U-shape of the H, and the spine avoidance space H is formed in a square shape in the cross section, that is, It is formed in a square shape.

In the illustrated back portion internal cushion member 210, the three members of the pair of spine avoidance cushion members 24, 25 and the bridging cushion member 26, which are formed in a tapered shape, are combined and bonded together as described above and integrally molded. In addition to the three-member configuration of the back portion internal cushion member 200 shown in FIG. 1, the back portion of the pair of spine avoidance cushion members 24, 25, that is, the back portion configuration frame 20 side, is spanned between the pair of spine avoidance cushion members 24, 25. In order to pass, a single flat cushion member, that is, a backing cushion member 201 is assembled and bonded, and the four members are integrated.

When the backing cushion member 201 is affixed to the entire back surface side of the spine avoidance cushion members 24 and 25 formed in a tapered shape, the four members are integrated by the interaction (synthesis) of the cushioning properties (repulsive force) of the four members. As shown in FIGS. 7, 9, and 12, the rear-side inner cushion member 210 has a substantially spindle shape in a side view, and the bridging cushion member 26 is complementary in accordance with the curvature of the back of the seated person. It becomes a curved shape.

The back side internal cushion member 200 of the first example shown in FIG. 11 is also attached when the back side of the pair of tapered spine avoidance cushion members 24 and 25 is attached to the back side configuration frame 20 side. As will be described later, the outermost layer cushion member 30 that forms the outermost layer of the seat chair, the surface cover 31 that covers the outer surface of the outermost layer cushion member 30, etc. A curved surface having a complementary shape corresponding to the curvature of the back portion of the bridging cushion member 26 is formed.

In this way, by gradually reducing the thickness of the pair of spine avoidance cushion members 24 and 25 toward the upper end side (22) of the back surface portion 2, as shown in FIG. ), That is, the curvature of the curved surface on the back side of the bridging cushion member 26 is deepened and the back of the seat is easy to ride, so that the upper half of the seat (particularly the back) is displaced in the seating direction. Can be more effectively prevented, and the body pressure of the upper body can be received (shared) by the back surface portion 2 more, so that the body of the occupant sitting on the seat surface 1 compared to the conventional seat chair A larger amount of pressure can be distributed to the back surface portion 2, and as a whole, a comfortable seat can be provided.

  The back portion internal cushion member 210 of the second example constituted by the pair of spine avoidance cushion members 24, 25, the bridging cushion member 26, and the backing cushion member 201 is also the back portion internal cushion of the first example. Like the member 200, the four members are preliminarily shaped as separate bodies, that is, single pieces, and the four members are bonded together with an adhesive when they are attached to the rear surface configuration frame 20, and handled as a single piece. Alternatively, the four members may be bonded in advance with an adhesive and integrated (integral formation).

In any case where the four members constituting the back portion internal cushion member 210 are each set as a single unit, or when the four members are previously integrated with an adhesive or the like, the cushion of each member is previously stored. By changing the characteristics (repulsive force) and shape (dimension size, etc.), in the case of a single unit, the cushion can be selected by selecting the combination of members according to the physique of the user (seater). The back surface inner cushion member 210 having different performance can be easily configured, and in the case of being integrated, the back surface having different cushion performance according to the physique of the planned user (seater). Since the internal cushion member 210 can be prepared in advance as a single item, the back internal cushion member 2 having cushioning properties according to the individual user's physique according to the order. Select 0, the chair seat with optimum cushioning in response to the physical constitution of the individual loci person can be provided quickly and easily.

The spine avoidance cushion members 24, 25 extend from the lower end edge (23) side to the upper end edge (22) side of the frame surface of the back surface 2, that is, the back surface 2, for example, a prismatic shape, that is, a long shape. In this embodiment, the thickness of the cushion members 24 and 25 is gradually reduced from the vicinity of the center in the extending direction toward the upper edge (22) of the frame surface. 7).

  As described above, on the pair of spine avoidance cushion members 24 and 25 disposed on the back surface constituting frame 20, a single flat bridge cushion member is used as the back base cushion member 26 and the both cushions. The members 24 and 25 are laid so as to cover the layers (FIGS. 7 and 8). When arranged in this way, the spine avoidance cushion members 24 and 25 are interposed via the back base cushion member 26. For example, as shown in the figure, the angular shape of the spinal avoidance cushion member 26 that has been singulated is gently relaxed by the flat back base cushion member 26 as shown in the figure. Can be made. Therefore, it is possible to generate a comfortable feeling for the seated person.

Next, referring to FIGS. 7, 8, and 13 to 15, a description will be given of a cushion member for a seat-chamber seat surface portion provided inside the seat surface portion 1 (hereinafter, also simply referred to as a cushion member for seat-surface portion interior).
The cushioning member 300 for the seating surface part shown in this embodiment (hereinafter also referred to as the cushioning member 300 for the seating surface part in the first example) has a size that covers the frame surface of the frame constituting the seating surface part, as will be described in detail below. A pair of seat base cushion members formed and a rear edge side of the seat base cushion member, and a pair of portions disposed at intervals on the left and right rear end sides of the occupant's buttocks The buttock rear end receiving cushion member and the thigh cushion member disposed on the front end edge side of the seat base cushion member and receiving the pressure on the thigh of the occupant.

First, in FIG. 7, FIG. 8, and FIG. 13, the seat surface portion constituting frame 10 is directly provided with a seat surface base cushion member 17 formed in a flat shape so as to cover the width of the frame surface. On the base cushion member 17, the left and right rear end sides of the occupant's buttocks abut against each other, and the pair of heel rear end receiving cushion members 13 and 14 receiving the pressure at the left and right rear end side portions of the occupant's buttocks Are provided separately.
In this way, by providing the pair of buttocks rear end receiving cushion members 13 and 14 at the left and right rear end side portions of the seat occupant's buttocks, the sitting position of the seat surface portion 1 on the rear side of the buttocks can be changed to the seat surface portion in the seat chair. 1 ideal position (parallel relationship between the main part of the spine and the straight line in the above-mentioned sitting posture and the frame surface of the frame constituting the back portion), that is, the relationship relating to body pressure dispersion with the swingable back portion It is possible to guide or position the ideal position in the system.

In addition, by providing a pair of buttocks rear end receiving cushion members 13 and 14 at left and right rear end side portions of the buttocks, that is, left and right positions of the spine, a direct pressure by the tailbone at the lower end of the seated spine is applied. It can also be avoided that the seat surface portion 1 receives.
Thus, by arranging the pair of buttocks rear end receiving cushion members 13 and 14 as described above so that the lower end of the spine of the seated person does not directly and strongly contact the seat surface 1, the seat surface 2 against the spine is arranged. It is possible to relieve the contact of the buttocks, and the body pressure of the buttocks can be distributed to the left and right buttocks rear end receiving cushion members 13 and 14, thereby reducing the contact (pressure) of the buttocks and the tailbone to one point of the seat surface 1. Can be made.

The pair of buttocks rear end receiving cushion members 13 and 14 of this embodiment are members formed in a quadrangular column shape so as to extend in the left-right direction of the seat surface portion. You may form as a single-piece | unit member made into the substantially right-angled triangle shape which thickness increases gradually toward the back side from the side. In this case, it is arranged on the seat base cushion member 17 (not shown) so that the hypotenuse of the right triangle contacts the buttocks.
In this way, by forming the surface on which the buttocks rear end receiving cushion members 13 and 14 abut against the buttocks into a sloped shape corresponding to the curved surface of the buttocks, a comfortable touch sensation for the seated person when abutting on the buttocks. In addition, it is possible to prevent unnecessary displacement of the buttocks toward the back of the seat chair, and to position the buttocks at an ideal sitting position (the above-mentioned sitting posture) of the seat surface portion 1.

Further, on the seat surface base cushion member 17 of the seat surface portion 1, on the front end side of the seat surface, a thigh cushion member 15 that contacts the lower part of the thigh of the occupant is provided along the front end edge side of the seat surface. It is provided so as to extend in the left-right direction of the seat.
The thigh cushion member 15 is formed as a single plate member having a rectangular cross section and a relatively thin thickness so as to contact substantially the entire lower surface of the thigh.
Thus, by providing the thigh cushion member 15, it is possible to prevent the seated person from shifting to the front side of the seat surface, the front side of the seated person's buttocks is the thigh cushion member 15, and the left and right rear sides of the buttocks are the buttocks. By the members of the rear end receiving cushion members 13 and 15, the collar portion can be naturally guided (positioned) to an ideal sitting position (the above-mentioned sitting posture) at three points in three directions.

  Further, as shown in FIG. 15, the pair of buttocks rear end receiving cushion members 13 and 14 and the thigh cushion member 15 of the seat surface portion 1 are replaced with the cushion for the seat surface portion inside of the first example of the illustrated embodiment. Contrary to the member 300, the seat surface portion constituting frame 10 is directly disposed in the same arrangement as in the above embodiment, and the pair of flange rear end receiving cushion members 13 disposed on the seat surface portion constituting frame 10 is provided. , 14 and the thigh cushion member 15 may be disposed so as to integrally cover (hereinafter, also referred to as the cushion member 310 for the seat surface portion in the second example).

Also in the cushion member 310 for the seat surface portion in the second example, the pair of buttocks rear end receiving cushion members 13 and 14 and the thigh cushion member 15 of the seat surface portion 1 are located on the front side part and the rear side of the seat member's buttocks. The sitting position of the buttocks can be positioned at an ideal position by the three parts including the left and right parts.
In other words, with this arrangement, the buttocks rear end receiving cushion members 13 and 14 and the thigh cushion member 15 are indirectly connected to the corresponding portions of the occupant's buttocks and thighs via the seat base cushion member 17. As shown in the figure, the squared shapes of the single buttocks rear end receiving cushion members 13 and 14 and the thigh cushion member 15 are gently relaxed by the planar seat base cushion member 17 as shown in the figure. Thus, a pleasant touch can be produced.

  The cushioning member 300 for the seating surface portion in the first example described above has the seating surface base cushion member 17 mounted on the seating surface portion constituting frame 10 and a pair of buttocks rear end receiving cushion members on the seating surface base cushioning member 17. 13 and 14 and the thigh cushion member 15 are arranged inside the seat surface portion in a state where the three members are disposed so as to surround the buttock from the three sides, and inside the seat surface portion of the second example. The cushion member 310 has a pair of buttocks rear end receiving cushion members and thigh cushion members mounted on the seat surface portion constituting frame, and the seat surface on the buttocks rear end receiving cushion members and thigh cushion members. It is the structure provided in the inside of a seat surface part in the state by which the base cushion member is arrange | positioned.

  In either case of the first example or the second example described above, the four members, which are constituent members, are shaped in advance as separate bodies, that is, as single bodies, and the four members are bonded to each other when being attached to the rear surface constituent frame 20. The four members may be bonded together with an adhesive and integrated (single product) in advance (integral formation).

Each of these four members constituting the cushion member 300, 310 for the inside of the seating surface portion is used as a single unit, or when the four members are pre-integrated with an adhesive or the like in advance. By making the cushioning properties (repulsive force) and shapes (dimensions size, etc.) of the members different, in the case of a single unit, selection of the combination of members according to the physique of the user (seat) Therefore, the cushioning members 300 and 310 for the interior of the seating surface having different cushioning performances can be easily configured, and in the case of being integrated, according to the physique of the planned user (seater) Since the cushioning members 300 and 310 for the interior of the seating surface having different cushioning performances can be prepared in advance as single items, they have cushioning properties according to the physique of individual users according to orders. Select seat portion inner cushion member 300 and 310, a chair seat with optimum cushioning in response to the physical constitution of the individual loci person can be provided quickly and easily.

7 and 15, reference numeral 30 denotes an outermost layer cushion member, and reference numeral 31 denotes a surface cover that covers the outer surface of the outermost layer cushion member 30.
The outermost layer cushion member 30 is a member that finally adjusts the surface shape of the outer surface of the seat chair, and covers the outer surface of the seat chair almost entirely. It is composed of materials (material and cushion performance) that do not substantially interfere with the effect.

Moreover, in both figures, as a cushion member, in addition to the outermost layer cushion member 30, various cushion members constituting the present invention (a seat surface base cushion member 17 disposed in the seat surface portion 1 and a pair of collar portions) Only the rear end receiving cushion members 13 and 14 and the thigh cushion member 15 and a pair of spine avoidance cushion members 24 and 25 disposed in the back surface portion 2 and the back base cushion member 26 are shown. However, the present invention is not limited to this, and a cushion member that does not constitute the present invention, for example, a cushion member for adjusting the surface shape of a seated chair, etc., may be appropriately disposed in place (not shown).

Further, in the above-described embodiments and drawings, there are shown examples in which a pipe frame is used as a constituent frame that forms the skeleton of a seat, and in such a pipe frame, when a cushion member is disposed on the frame, In this case, a tape, for example, a band tape that is generally used as a fastening band for packing, is appropriately stretched on the space surface of the component frame, but its usage is omitted because it is a conventional means in the art.
Further, the skeleton constituting frame of the present invention does not necessarily need to be a pipe frame, and the skeleton of the seating surface portion and the back portion may be a plate member made of wood or metal. This also includes a plate member made of wooden or metal.

  Although the present invention has been described with respect to the reclining seat chair in the embodiments, the present invention is not limited to this, and the present invention can be widely used for a fixed seat chair in which the angle between the seat portion and the backrest portion is constant.

DESCRIPTION OF SYMBOLS 1 Seat surface part 10 Seat surface part structure frame 11 Reclining gear 12 Back surface support frame 13 buttock rear end receiving cushion member Connection frame member 14 buttock rear end receiving cushion member
15 thigh cushion member 16 connecting frame member 17 seat base cushion member 2 back surface portion 20 back surface configuration frame 21 swing axis (axis S)
22 Upper edge side frame member 23 Lower edge side frame member 24 Spine avoidance cushion member 25 Spine avoidance cushion member 26 Crossing cushion member (back base cushion member)
200 Cushion member for back side internal part (first example)
201 Backing Cushion Member 210 Cushioning Member for Inside Back (Second Example)
300 Cushion member for the inside of the seat (first example)
310 Cushion member for seat surface part inside (second example)
S axis (oscillating shaft 21)
H spine avoidance space

Claims (40)

A cushion member provided inside the back portion of the seat chair provided with at least a back surface portion for receiving the back portion of the seat portion receiving the buttocks of the seat and the back portion and the shoulder portion of the seat,
A pair of spine avoidance cushion members arranged separately to extend in parallel to the spine with a space on the left and right of the spine of the seat when the back of the seat is abutted;
The pair of spine avoidance cushion members are interposed between the pair of spine avoidance cushion members and disposed on the pair of spine avoidance cushion members so as to span the spine avoidance cushion members. A cushion member for a back part of a seat chair, characterized in that the cushion member is constituted by a bridging cushion member.   The cushion member for a back part of a seat back according to claim 1, wherein the spine avoidance cushion member has a quadrangular prism shape.   The seat back portion according to claim 1, wherein the spine avoidance cushion member has a tapered shape whose thickness gradually decreases from the vicinity of the center in the extending direction of the member toward the upper end side of the back portion. Internal cushion member.   The spine avoidance cushion member is substantially perpendicular to the upper end side in a side view so that the thickness gradually decreases from the vicinity of the center in the extending direction of the member toward the upper end side of the back surface portion so as to approach the crossing cushion member side. The cushion member for a seat back part inside part according to claim 12, wherein the cushion member is triangular.   The spine avoidance cushion member is characterized in that the upper end side has an isosceles triangle shape in side view so that the thickness gradually decreases from the vicinity of the center in the extending direction of the member toward the upper end side of the back surface portion. The cushion member for a seat back part inside as described in 1.   6. The seat cushion back portion internal cushion member according to any one of claims 1 to 5, wherein the spanning cushion member has a flat plate shape.   The spine avoidance space surrounded by a pair of spine avoidance cushion members and a bridging cushion member, wherein a spine avoidance space is formed on the back side of the bridging cushion member in the extending direction of the spine of the occupant. The cushion member for a seat back part inside in any one of Claims 1 thru | or 6.   Left and right spine avoidance cushions so that the backing cushion member is surrounded by a pair of spine avoidance cushion members and a bridging cushion member and closes the open side of the U-shaped spine avoidance space formed in a U shape in the cross section. The cushion member for a seat back portion inside of claim 7, wherein the cushion member is provided so as to stretch between the members. The pair of spine avoidance cushion members and the bridging cushion member are integrally formed by pasting together, and the seat back portion cushion member for interior part according to any one of claims 1 to 8. The seat cushion back portion internal cushion member according to any one of claims 1 to 8, wherein the cushion member is integrally formed by shaping a pair of spine avoidance cushion members, a bridging cushion member, and a single member. 9. The seat cushion back portion internal cushion member according to claim 8, wherein the pair of spine avoidance cushion members, the bridging cushion member, and the backing cushion member are integrated with each other by bonding. The cushioning member for the back part of the back of the seating chair according to claim 8, wherein the cushioning performance of the backing cushion member is different from the cushioning performance of the pair of spine avoidance cushioning members and / or the spanning cushioning member. The cushioning performance of the backing cushion member is made different from the cushioning performance of the pair of spine avoidance cushioning members and / or the spanning cushioning member. A method for producing a cushion member for a back part of a seat back, wherein the cushioning performance of the seat is arbitrary.   The seat surface portion constituting frame that constitutes the skeleton of the seat portion that receives the buttocks of the seat and the back portion constituting frame that constitutes the skeleton of the back portion that receives the back portion of the lumbar portion, the back portion, and the shoulder portion of the seat portion. A seat chair comprising the seat back portion internal cushion member according to any one of claims 1 to 13 provided on the back portion constituting frame of the seat chair.   A seat surface part constituting frame that constitutes the skeleton of the seat surface part that receives the buttocks of the seat, and a back part constituting frame that constitutes the skeleton of the back part that receives the back part of the lumbar part, the back part and the shoulder part of the seat person, And the back surface component frame swings freely according to the bending motion of the occupant's upper body side in the front-rear direction with the axis passing through the frame surface formed by the back surface component frame in the left-right direction as the swing axis. A seat chair comprising the seat back portion internal cushion member according to any one of claims 1 to 13 provided on the back portion constituting frame of the seat chair configured to move. .   The swinging of the back surface component frame is such that the frame surface stops at a tilt according to the pressure difference between the frame surface portion above the swing shaft and the frame surface portion below the swing shaft on the frame surface of the back surface component frame. The seating chair according to claim 15, which is a movement to be attempted. The seating chair according to claim 15 or 16, wherein a frame surface of the back constituting frame is formed in a substantially long rectangular shape that is long in the left-right direction of the seated person.   The seating chair according to any one of claims 15 to 17, wherein the back surface part is configured to be able to come into surface contact with at least the back part of the occupant when the back surface component frame swings.   The vertical length of the frame surface of the rear part constituting frame is the length from the eighth or ninth thoracic vertebra to the fourth lumbar vertebra of the occupant's spine in a sitting posture where the inclination angle of the upper body of the occupant is about 125 degrees. The seat chair according to any one of claims 15 to 18, wherein the seat chair is provided.   The seating chair according to any one of claims 15 to 19, wherein the setting position of the swing shaft is within a range in the height direction of the waist of the seated person.   The height direction setting position of the swing shaft is set within the range of the height direction of the third to fifth lumbar vertebrae of the seat in the seat posture where the inclination angle of the upper body of the seat is about 125 degrees. The seat chair according to any one of claims 15 to 20.   The position of the rocking axis seat chair in the front-rear direction is such that the rocking axis is on the vertical line passing through the sixth to seventh thoracic vertebrae of the spine of the occupant's spine in a sitting posture where the inclination angle of the upper body of the occupant is about 125 degrees. The seating chair according to any one of claims 15 to 21, wherein the seating chair is positioned.   The set position in the frame surface of the swing shaft is set to a position in which the upper side length is longer than the lower side length in the vertical direction of the frame surface formed by the rear surface configuration frame. The seat chair according to any one of claims 15 to 22, wherein   The set position in the frame surface of the swing shaft was set to a position where the ratio of the length in the lower side direction and the length in the upper side direction from the shaft in the up and down direction of the back surface constituting frame was divided approximately by 1: 3. The seat chair according to any one of claims 15 to 23, wherein:   The rocking range of the back surface component frame is at least when the occupant lifts the buttocks from the seat surface of the seat surface and fully extends the back to the back, and the back surface comes into surface contact with the back of the seat The seating chair according to any one of claims 15 to 24, wherein the seating chair is tiltable in a state. 26. The back surface portion constituting frame is a substantially long rectangular frame body forming an outer peripheral edge of the back surface portion, and has swing shafts on the left and right outer sides of the frame body. A seat chair according to any one of the above. 27. The back surface portion constituting frame is a substantially long rectangular frame body, and has a shaft body as a swing shaft extending in the horizontal direction in the left-right direction. A sitting chair according to any one of the above. The rear surface configuration frame is pivoted to a pair of left and right rear surface support frames in which both ends of the swing shaft of the rear surface configuration frame are tiltably coupled to the left and right ends of the seat surface configuration frame via reclining gears. The seat chair according to any one of claims 15 to 27, wherein the seat chair is freely pivotally supported. 29. The seat chair according to claim 28, wherein the back support frame is provided at a position separated rearward from the waist so as not to receive direct pressure on the seat waist.   30. The seat chair according to claim 28 or 29, wherein the pair of left and right rear surface support frames are integrally formed by a frame member that couples the two rear surface support frames. The cushion member for the seat surface portion inside provided in the seat surface portion is
A seating surface base cushion member formed in a size covering the frame surface of the seating surface portion constituting frame;
A pair of buttocks rear end receiving cushion members disposed on the rear edge side of the seating surface base cushion member and spaced from each other on the right and left rear end side of the occupant's buttocks; and
15. A thigh cushion member disposed on a front end edge side of the seat surface base cushion member and receiving a pressure of a thigh of a seated person. 30. The seat chair according to any one of 30. 32. The seating chair according to claim 31, wherein three members of a pair of buttocks rear end receiving cushion members and thigh cushion members provided on the seat base cushion member are arranged so that a sitting position of the buttocks is determined. Child. 33. The seat chair according to claim 31 or claim 32, wherein the buttocks rear end receiving cushion member has a quadrangular prism shape extending in the left-right direction of the seat surface portion. 34. The seat chair according to claim 31, wherein the thigh cushion member is a single member having a quadrangular cross section extending in the left-right direction of the seat surface portion. 35. The four members of the seat base cushion member, the pair of buttocks rear end receiving cushion member, and thigh cushion member are integrally formed so as to be handled as a single unit. A seat chair according to any one of the above. The cushion member for the seat surface part is mounted on the seat surface component frame, and a pair of buttocks rear end receiving cushion members and thigh cushion members are arranged on the seat surface base cushion member. 36. The seat chair according to any one of claims 31 to 35, wherein the seat chair is provided inside the seat surface portion. In the cushioning member for the seat surface part, the pair of buttocks rear end receiving cushion member and the thigh cushion member are mounted on the seat surface part constituting frame, and the upper part of the buttocks rear end receiving cushion member and the thigh cushion member is mounted. 36. The seat chair according to any one of claims 31 to 35, wherein the seat chair is provided inside the seat surface portion in a state where the seat surface base cushion member is disposed on the seat chair.   Each component of the cushion member for the inner part of the back surface is molded in advance for each different size and different cushioning performance, and is selected appropriately according to the planned occupant's physique, and is optimal for the planned occupant The method for manufacturing a seating chair according to any one of claims 14 to 37, comprising a back surface inside cushion member.   Each component of the cushioning member for the seat surface part is molded in advance for each different size and different cushioning performance, and it is selected appropriately according to the planned occupant's physique, and is optimal for the planned occupant 38. The seat chair manufacturing method according to any one of claims 14 to 37, wherein the seat member includes an internal cushion member.   Each constituent member of the cushion member for the back surface portion and the cushion member for the inside of the seat surface portion is molded in advance for each different dimensional size and for each different cushion performance, and is appropriately selected according to the planned physique of the occupant. The method for manufacturing a seat chair according to any one of claims 14 to 37, comprising a cushion member for a back portion and a cushion member for a seat surface portion that are optimal for a seated person.

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