JP4625399B2 - Chair seat - Google Patents

Description

  The present invention relates to a chair seat.

  An example of a chair seat using a membrane member is disclosed in Japanese Patent Application Laid-Open No. 2001-299501. This seat 101 is shown in FIG. The seat 101 has a structure in which a film member (support sheet) 105 is stretched on a frame 103. The film-like member 105 is made by weaving string-like fibers vertically and horizontally, and expands and contracts according to the applied load.

  When sitting on a chair assembled with the seat 101, the membrane member 105 constituting the seat 101 supports the seated person while expanding and contracting according to the weight. That is, the membrane member 105 functions as a seat having cushioning properties.

JP 2001-299501 A

  However, in the seat 101 using the above-described film-like member 105, only the film-like member 105 is stretched on the frame 103, and the extension of the film-like member 105 is the largest at the center where the seated person hits. The membrane member 105 was difficult to bend according to the body of the seated person, and the sitting comfort was poor.

  An object of this invention is to provide the seat of the chairs excellent in sitting comfort.

  In order to achieve such an object, the seat of the chair according to claim 1 is a membrane-like tension member attached in a state of being spread to the attachment portion, and a shape-retaining shape disposed on or connected to the membrane-like tension member. A seat plate member having a member, and a cushion material provided on the seat plate member, and the shape retaining member is a thigh pad portion that supports the thigh of the seated person and a rear end from the rear end of the thigh pad portion. And the thigh padding portion constitutes the front portion of the seat plate member, and the heel padding portion is at least behind the line connecting the positions facing the left and right sciatic nodules of the seated person It is what extends.

  Accordingly, the seated person's buttocks are supported by the buttocks support part and the thighs are supported by the thigh support part. Where the shape retaining member is provided, the membrane tension member can be prevented from being excessively bent when the weight of the seated person is added, thereby controlling the shape of the membrane tension member. Since the shape-retaining member is displaced and followed by expansion and contraction of the film-like tension member at a portion where there is no member, it functions as a cushion. In addition, the thigh padding portion of the shape retaining member constitutes the front portion of the seat plate member, and the thigh of the seated person is attached to the attached portion such as a frame having a relatively large rigidity and a relatively small film-like tension member. It does not hit the boundary part.

  Moreover, the seat of the chairs of Claim 2 curves the front part of a seat board member toward the downward direction. Therefore, it becomes difficult for the front part of the seat plate member to strongly hit the thigh of the seated person, and compression of the thigh can be suppressed.

  Moreover, the seat of the chairs of Claim 3 has comprised the concave shape in which the upper surface of the shape-retaining member was depressed below. Therefore, the upper surface of the shape retaining member has a shape corresponding to the seated person's buttocks.

  Furthermore, the chair seat according to claim 4 is provided with a slit in the shape retaining member. Therefore, the rigidity of the shape-retaining member can be partially reduced and flexibility can be imparted.

  In the seat of the chairs according to claim 1, a seat plate member having a membrane-like tension member attached in a state of being spread on the attached portion and a shape-retaining member arranged to be superimposed on or connected to the membrane-like tension member; And a cushioning member provided on the seat plate member, and the shape retaining member includes a thigh pad part that supports the thigh of the seated person and a heel pad part that extends rearward from the rear end of the thigh pad part. The thigh rest part constitutes the front part of the seat plate member, and the heel rest part extends at least rearward from a line connecting positions facing the left and right sciatic nodules of the seated person. The shape of the film-like tension member at the time can be held in an appropriate shape, and the sitting comfort can be improved. In particular, by forming the shape-retaining member into a shape that matches the body of the seated person, the seated person can be supported in a natural posture, and the sitting comfort can be further improved. Further, since the seat occupant's buttocks can be supported by the buttocks, the stability of the seat can be improved, and the seat occupant's seat acting by the expansion and contraction of the membrane portion around the buttocks can be improved. Body pressure can be dispersed well.

  Here, if there is no shape-retaining member, the frame feeling peculiar to the membrane tension member (the frame member of the seated person's thigh, the membrane tension member and the frame of the chair, etc. It hits the boundary portion of the film-like tension member and feels the hardness of the frame-like member and the frame). By supporting the thigh of the seat occupant by the thigh pad portion of the shape-retaining member, it becomes difficult for the seat occupant to feel the frame, and the sitting comfort can be improved. In addition, when there is no shape-retaining member, it is difficult to change the manner in which the body pressure of the seated person acting on the seat surface is dispersed, but since the present invention includes the shape-retaining member, the shape of the shape-retaining member By changing the size and size, it is possible to design various ways of dispersing the body pressure of the seated person, and it is possible to design for ideal body pressure dispersion.

  Moreover, since the cushioning material is provided on the seat plate member, the cushioning material is stacked on the membrane tension member while retaining the function of fitting to the body shape of the seated person, which is the merit of the membrane tension member. A feeling of floating can be improved by improving the comfort of the soft feeling, and the holding part of the shape retaining member is provided to the seat bone part of the seated person, so that the sitting feeling of stability and firm feel can do.

  Further, the presence of the film-like tension member makes the feel of the seat surface quite soft. If you try to make the softness equivalent to using a membrane-like tension member with only a shape-retaining member without using a membrane-like tension member, you need to increase the thickness of the cushion material. The appearance will deteriorate. By placing the cushion material on the film-like tension member, the sitting comfort can be softened, the thickness of the cushion material can be reduced, and the appearance can be prevented from deteriorating.

  Moreover, in the seat of the chairs of Claim 2, since the front part of a seat board member curves toward the downward direction, it suppresses that the front part of a seat board member presses a seated person's thigh. The uncomfortable feeling given to the thigh can be suppressed and the sitting comfort can be improved.

  Moreover, in the seat of the chairs of Claim 3, since the upper surface of the shape-retaining member has a concave shape that is depressed downward, the upper surface of the shape-retaining member can be shaped to correspond to the buttocks of the seated person. Can improve the sitting comfort.

  Furthermore, the chair seat according to claim 4 is provided with a slit in the shape retaining member. Therefore, the rigidity of the shape-retaining member can be partially reduced, and appropriate flexibility can be imparted. For this reason, sitting comfort can be improved.

  Hereinafter, the configuration of the present invention will be described in detail based on the best mode shown in the drawings.

  1 to 3 show a first embodiment of a chair seat of the present invention. The seat of this embodiment is a chair seat, and the seat of this chair is stacked on the membrane tension member 3 and the membrane tension member 3 attached in a state of being spread on the frame-like member 5 that is the attachment portion. And a cushioning member 13 provided on the seat plate member 1, and the shape retaining member (hereinafter referred to as a support plate) 4 is a seated person. The thigh pad part 4a for supporting the thigh pad part and the heel pad part 4b extending rearward from the rear end of the thigh pad part 4a. The thigh pad part 4a constitutes the front part of the seat plate member 1. The heel pad 4b extends rearward from a line L connecting positions P and P (FIG. 13) facing at least the left and right sciatic nodules of the seated person.

  FIG. 13 shows the body pressure distribution when sitting on a chair. In FIG. 13, the lower part is a part corresponding to the buttocks, and the upper part is a part corresponding to the thigh. The darker the color, the greater the pressure. As is clear from FIG. 13, the greatest pressure acts on the position P corresponding to the left and right ischial nodules.

  The frame-like member 5 is insert-molded around the film-like tension member 3, for example. This frame-like member 5 is attached to the frame 2 of the chair. That is, by attaching the frame-shaped member 5 to the frame 2 of the chair, the entire seat of the chair can be assembled to the chair. The frame-like member 5 is, for example, screwed to a receiving metal fitting 6 welded to the frame 2.

  The film-like tension member (hereinafter simply referred to as tension member) 3 is, for example, a net, a mesh, a film, a fabric, a nonwoven fabric, a woven fabric, a knitted fabric, or the like. The tension member 3 has sufficient strength to support the weight of the seated person and elasticity to expand and contract according to the applied load. The tension member 3 is stretched with a predetermined tension so as to exhibit elasticity suitable for use as a cushion. In this embodiment, the tension member 3 is made of a heat-shrinkable material such as an olefin resin or polyester, and is inserted between the molds in a tensionless state to insert the frame-like member 5 and then heated. Thus, the tension member 3 is contracted to give a predetermined tension.

  The support plate 4 and the frame-like member 5 are made of resin, for example, a molded product. In addition, the kind of resin to be used is not specifically limited. The support plate 4 is placed on the surface of the tension member 3, and the frame-like member 5 is insert-molded on the tension member 3. The support plate 4 is disposed at a position that directly supports a seated person of the tension member 3. In this embodiment, since it is considered that a seated person generally sits in the center of the tension member 3, the butting portion 4 b of the support plate 4 is disposed in the center of the tension member 3.

  In the above description, the support plate 4 is formed separately and overlapped with the tension member 3, and the thigh pad 4a is connected to the frame-shaped member 5. However, the support plate 4 is insert-molded to form the tension member. 3 and the frame-shaped member 5 may be integrally formed.

  The front part constituted by the support plate 4 of the seat plate member 1 is curved downward. Therefore, it becomes difficult for the front part of the seat plate member 1 to strongly hit the thigh of the seated person, and compression of the thigh can be suppressed. For this reason, the uncomfortable feeling given to a thigh can be suppressed and sitting comfort can be improved.

  A cushion material 13 made of, for example, urethane foam is further placed on the seat plate member 1 of the chair seat thus manufactured. Then, the seat of the chair is completed by covering the surface with a skin member (not shown). When sitting on a chair with a seat, the support plate 4 mainly supports the weight of the seated person. At this time, when the tension member 3 expands and contracts, the support plate 4 is displaced and the support plate 4 itself is also deformed, so that it functions as a cushion. Here, compared to the case where the support plate 4 is not provided, the weight of the seated person is received by the tension member 3 when the support plate 4 is not provided. Elongation is greatest. For this reason, the tension member 3 cannot be bent in accordance with the shape of the seated person's body, and the tension acting as a cushion is non-uniform in the portion where the seated person's body hits, thereby deteriorating the sitting comfort. On the other hand, in the present invention, the weight of the seated person is not received by the tension member 3, but is mainly received by the support plate 4, so that the body of the seated person can be supported by the plate-like member and the tension acting as a cushion Can be prevented from becoming partially uneven, and the sitting comfort can be improved.

  Further, the thigh pad 4a of the support plate 4 constitutes the front seat of the seat plate member 1, and the thigh of the seated person is the boundary between the frame member 5 having a relatively large rigidity and the tension member 3 having a relatively small rigidity. Never hit the part. That is, the thigh part of the seated person can be supported by the thigh pad part 4a of the support plate 4 which is a plate-like member. For this reason, it becomes difficult for the seated person to feel the frame feeling of the hardness of the frame-like member 5, and the sitting comfort can be improved.

  In addition, since the seated person's buttocks can be supported by the butting section 4b, the stability of the seated person can be improved, and the tension members 3 on both sides and the rear section of the butting section 4b can be expanded and contracted. The body pressure of the seated person acting can be dispersed well. That is, the stability of the seated person and the dispersion of body pressure can be achieved at a high level.

  Further, since the manner of expansion and contraction of the tension member 3 changes by changing the shape and size of the support plate 4, it is possible to design various ways to disperse the body pressure of the seated person. It becomes possible to design in a distributed manner.

  Further, since the cushion material 13 is placed on the seat plate member 1, the cushion material 13 is stacked on the tension member 3 while retaining the function of fitting to the body shape of the seated person, which is the merit of the tension member 3. A feeling of floating can be obtained by improving the sitting comfort of the soft feeling, and by providing the butting portion 4b of the support plate 4 to the seat bone portion of the seated person, a stable feeling and a stable sitting comfort can be achieved. .

  Further, the presence of the tension member 3 makes the feel of the seat surface quite soft. For example, if the support member 4 is used without using the tension member 3 and the softness is the same as that when the tension member 3 is used, the thickness of the cushion material 13 must be increased. Gets worse. By placing the cushion material 13 on the tension member 3, the sitting comfort can be softened, the thickness of the cushion material 13 can be reduced, and deterioration of appearance can be prevented.

  The present invention can be applied to general chairs, office chairs, work chairs, nursing chairs, and other general chairs, and vehicles such as bicycles, two-wheeled vehicles, four-wheeled vehicles, buses, and trains. It is also possible to apply to the seat of the head.

  The above-described embodiment is an example of a preferred embodiment of the present invention, but is not limited thereto, and various modifications can be made without departing from the scope of the present invention.

  For example, in the above description, the support plate 4 is placed on the surface of the tension member 3, but it may be insert-molded on the back surface. Similarly, in the above description, the frame-like member 5 is insert-molded on the back surface of the tension member 3, but may be insert-molded on the surface. FIG. 4 shows an example in which the support plate 4 is insert-molded on the back surface of the tension member 3.

  Further, the support plate 4 may be insert-molded on both the front surface and the back surface of the tension member 3. Similarly, the frame-shaped member 5 may be insert-molded on both the front surface and the back surface of the tension member 3. FIG. 5 shows an example in which the support plate 4 is insert-molded on both the front surface and the back surface of the tension member 3.

  Further, as shown in FIGS. 6 and 7, the support plate 4 may be provided with slits 14. For example, in the seat plate member 1 shown in FIG. 6, a plurality of slits 14 are provided on the periphery of the flanged portion 4 b of the support plate 4. Further, in the seat plate member 1 shown in FIG. 7, a plurality of slits 14 extending from the thigh pad portion 4 a to the heel pad portion 4 b of the support plate 4 are provided. By providing the slit 14, the rigidity of the support plate 4 can be partially reduced and flexibility can be imparted. For this reason, sitting comfort can be improved. 6 and 7, the description of the frame-shaped member 5 is omitted. Further, the mesh of the tension member 3 is also omitted.

  Further, in the above description, the butting portion 4b of the support plate 4 has a relatively wide shape and the right and left ischial nodules of the seated person are supported by the butting portion 4b. For example, FIGS. As shown, the abutment portion 4b of the support plate 4 may have a relatively narrow shape, and may extend rearward between the positions P and P facing the left and right sciatic nodules of the seated person. In this case, it is possible to support the sciatic nodule portion of the seated person by the tension member 3 while supporting the seated person's buttocks by the butting part 4 b of the support plate 4. For this reason, it is possible to softly support the position of the sciatic nodule where the body pressure distribution is the largest while stably supporting the posture of the seated person, ensuring high stability and softness as a cushioning material. Both can be achieved. 9 may be formed in a so-called zigzag shape to prevent the boundary portion with the tension member 3 from becoming clear. Moreover, you may provide the slit 14 like the seat board member 1 shown in FIG. 6 to 10, the description of the frame-like member 5 is omitted. Further, the mesh of the tension member 3 is also omitted.

  The support plate 4 is not limited to a flat plate shape, and may be bent or curved according to the shape of the seated person's body.

  For example, as shown in FIG. 11, it is good also as a concave shape which the upper surface of the support plate 4 was depressed below. In this case, the sitting comfort can be further improved.

  For example, as shown in FIG. 12, a hole 15 may be provided in a portion of the thigh pad portion 4a where the thigh of the seated person hits.

  Further, the thickness of the support plate 4 may be partially varied to partially vary the degree of flexibility. By doing in this way, the support plate 4 can be deformed according to the shape of the seated person's body, and the seated person can be supported in a more natural posture. For this reason, sitting comfort can be improved further.

It is a top view which shows 1st Embodiment of the seat of the chairs of this invention, and shows the seat plate member. It is a disassembled perspective view of the seat of the chairs of FIG. FIG. 3 is a cross-sectional view of a position corresponding to a line III-III in FIG. 1, showing a state where the seat of the chair of FIG. 1 is attached to a frame of the chair. It is sectional drawing which shows 2nd Embodiment of the seat of the chairs of this invention. It is sectional drawing which shows 3rd Embodiment of the seat of chairs of this invention. The 4th Embodiment of the seat of the chairs of this invention is shown, and it is a top view of the seat board member. The 5th Embodiment of the seat of the chairs of this invention is shown, and it is a top view of the seat board member. The 6th Embodiment of the seat of the chairs of this invention is shown, and it is a top view of the seat board member. The seventh embodiment of the seat of the chairs of the present invention is shown and is a plan view of the seat plate member. 8th Embodiment of the seat of the chairs of this invention is shown, and it is a top view of the seat board member. 9th Embodiment of the chair seat of this invention is shown, It is sectional drawing of the seat board member. 10th Embodiment of the seat of the chairs of this invention is shown, It is a top view of the seat board member. It is a figure which shows a seated person's body pressure distribution. It is a perspective view of the cushion structure of the conventional chair.

Explanation of symbols

1 Seat plate member 3 Film-like tension member 4 Support plate (shape-retaining member)
4a Thigh pad part 4b heel pad part 5 Frame-shaped member (attached part)
14 Slit

Claims (4)

  A seat plate member having a film-like tension member attached in a state of being spread on the attached portion, and a shape retaining member arranged on or in series with the film-like tension member, and provided on the seat plate member A thigh pad that supports a thigh of a seated person, and a heel pad that extends rearward from the rear end of the thigh pad. The seat plate member constitutes a front portion, and the heel pad portion extends at least rearward from a line connecting positions facing the left and right sciatic nodules of the seated person. seat.   The seat of the chairs according to claim 1, wherein a front portion of the seat plate member is curved downward.   The chair seat according to claim 1 or 2, wherein an upper surface of the shape-retaining member has a concave shape recessed downward. The seat of the chairs according to any one of claims 1 to 3, wherein the shape retaining member is provided with a slit.