JP2014030668A - Legless chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a legless chair configured in such a manner that a sacral bottoming phenomenon does not occur even when a back part cushion is tilted backward during the reclining of the legless chair, belly muscle exercise, etc., there is little resistance of a bent part when it is bent, and breakage of the bent part does not occur.SOLUTION: A reclinable legless chair in which a seat part frame 2 is hinged to a back part frame 3 includes: a seat part cushion 5 supported by the seat part frame 2; a back part cushion 6 supported by the back part frame 3; and a sacral part cushion 7 disposed in a part corresponding to the sacral position between the seat part cushion 5 and the back part cushion 6.

Description

  The present invention relates to a seat chair, and particularly to a reclining seat chair in which an upper body support portion (back portion) can be raised and lowered with respect to a lower body support portion (seat portion). It is related with the reclining seat chair suitable for protection of the sacrum in.

  A conventional reclining seat chair of the type shown in FIG. 9 is known (hereinafter referred to as “Prior Art 1”, for example, see Patent Document 1).

  In the prior art 1 shown in FIG. 9, since the seat cushion 50 and the back cushion 51 are divided into two at the hinge portion 52, when the back cushion 51 is tilted backward, it is divided. A gap 53 is formed between the seat cushion 50 and the back cushion 51 in the vicinity of the hinge 52, and the sacrum of the resident enters the gap 53, and the sacrum comes into contact with a hard part without cushioning. Occurs. In this bottoming phenomenon, there is a problem that the impact on the sacrum cannot be relieved at the muscular portion, and the impact reaches the sacrum, causing pain.

  Further, as a conventional reclining seat chair, there is known a type in which a seat cushion and a back cushion are integrally connected (hereinafter referred to as “Prior Art 2”, for example, see Patent Document 2). In this prior art 2, the bottoming phenomenon as in the prior art 1 does not occur, but because the resistance when bending the integrally connected cushion is large, the usability is bad, and the bent portion is damaged due to repeated bending. There was a problem to do.

Japanese Patent Laying-Open No. 2004-350792 (page 12, FIG. 5) JP 2006-340876 A (page 14, FIGS. 7 and 8)

  The present invention was made paying attention to the problems in the prior arts 1 and 2, without causing a sacral bottom phenomenon even when the back cushion is tilted backward during reclining and abdominal muscle movement, etc. An object of the present invention is to provide a seat chair having a structure in which the resistance of the bent portion during bending is small and the bent portion is not damaged.

In order to solve the above problems, a seat chair of the present invention is:
In a reclining seat chair in which a seat frame and a back frame are hinged, a seat cushion supported by the seat frame, a back cushion supported by the back frame, and the seat cushion; A sacral cushion is provided between the back cushion and the portion corresponding to the sacral position.
According to this feature, even when the back cushion is tilted backwards during reclining and abdominal muscle exercise, the sacrum bottoming phenomenon does not occur, the resistance of the bent part during bending is low, and the bent part It is possible to provide a seat chair having a structure without damage.

The seat of the present invention is
Among the seat cushion, the back cushion, and the sacrum cushion, at least the sacrum cushion has a longitudinal groove formed in the center in the width direction on the surface side and extending in the longitudinal direction.
According to this feature, since there is a longitudinal groove in the portion where the sacrum is located, the feeling of pressure on the sacrum can be reduced. Moreover, since a groove | channel is a vertical groove, even if a relative shift | offset | difference arises between a resident and a seat chair at the time of reclining etc., this can be absorbed.

The seat of the present invention is
The seat cushion, the back cushion, and the sacrum cushion are covered with a cover, and at least a cover that covers the seat cushion is fixed to the seat frame.
According to this feature, when a structure in which the seat cushion, the back cushion, and the sacrum cushion covered with the cover are fixed to the seat frame through the cover is adopted, the back cushion and the sacrum cushion with respect to the frame Since the two are independent, the back cushion and the sacral cushion can be reclined while maintaining the original shape without applying excessive stress to each cushion during the reclining of the back cushion. In addition, when a structure is adopted in which the seat cushion and the back cushion are fixed to the seat frame and the back frame, respectively, the back cushion can be reclined using the elastic deformation of the sacrum cushion. When the back cushion stands, the sacrum cushion is compressed and bulged and can further protect the sacrum.

The seat of the present invention is
The seat cushion, the back cushion, and the sacral cushion have cross-sectional structures in order from top to bottom, an upper layer composed of a soft urethane foam layer, an intermediate layer composed of a hard urethane foam layer or cloth, and a soft urethane foam. A first lower layer composed of layers and a second lower layer which is composed of a soft urethane foam layer and covers the frame are characterized.
According to this feature, body pressure dispersion and impact relaxation are achieved with the upper layer composed of a soft urethane foam layer, and support can be stabilized with an intermediate layer composed of a hard urethane foam layer. The first lower layer composed of the layers supports the intermediate layer, and the second lower layer composed of the soft urethane foam layer supports the first lower layer and the frame. Therefore, a comfortable seat can be provided.

The seat of the present invention is
The vertical groove is formed by forming a recess at the center in the width direction of the upper layer.
According to this feature, the vertical groove can be formed by processing the center of the upper layer in the width direction into a concave shape.

The seat of the present invention is
The vertical groove is formed by removing the center in the width direction of the upper layer.
According to this feature, the longitudinal groove can be easily configured by removing the center of the upper layer in the width direction by cutting or the like with a constant width.

The seat of the present invention is
The longitudinal groove is constituted by removing the center of the upper layer in the width direction and filling the urethane foam softer than the urethane foam constituting the upper layer, leaving the upper part of the removed portion.
According to this feature, the flutes are shallow, but soft urethane foam is filled under the flutes, so that the sacrum is sufficiently protected, and the left and right sides of the upper layer from which the center is removed. A bodily sensation can be achieved and the upper layer shape can be prevented from being broken.

The seat of the present invention is
A headrest cushion is provided, and the headrest cushion is movably provided at a position corresponding to the waist or foot.
According to this feature, the headrest cushion can be used as an assisting tool during abdominal muscle exercise, and can be used as a lumbar cushion for stabilizing the sitting position.

The seat of the present invention is
It features a form roller for exercise.
According to this feature, various exercises can be performed, and the rolling of the foam roller can be prevented by the longitudinal groove.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the occupant's sitting state with respect to the seat chair in Example 1, Comprising: (a) is a side view in the state where the back part stood up, (b) is a side view in the state where the back part inclined backward, c) shows a front view of a state in which the back portion stands. It is a perspective view for demonstrating typically the whole shape of a seat chair. BRIEF DESCRIPTION OF THE DRAWINGS It is a side view which illustrates typically the seat chair in Example 1, Comprising: (a) has shown the state in which the back part stood up, (b) has shown the state in which the back part inclined backward. It is a figure explaining the structure of a cushion, (a) is XX sectional drawing of FIG. 1, (b) is YY sectional drawing of FIG. 1, (c) is ZZ sectional drawing of FIG. is there. It is a schematic diagram explaining the example of longitudinal groove formation. It is a side view which illustrates typically the seat chair in Example 2, Comprising: (a) has shown the state in which the back part stood up, (b) has shown the state in which the back part inclined backward. It is explanatory drawing explaining the usage example of the cushion for headrests. It is explanatory drawing explaining the usage example of the form roller for exercises. It is a figure explaining prior art 1. FIG.

  EMBODIMENT OF THE INVENTION The form for implementing the seat chair which concerns on this invention is demonstrated below based on an Example.

  The seat chair according to the first embodiment will be described with reference to FIGS. 1 to 5.

  FIG. 1 is a diagram illustrating a sitting state of a dentist A with respect to a chair 1, wherein (a) is a side view of the seat chair standing upright, and (b) is a chair chair back portion. The side view of the state which inclined backward, (c) has shown the front view of the state in which the seat back part stood up. The seat chair 1 mainly includes a seat frame 2, a back frame 3, a hinge 4 that couples the seat frame 2 and the back frame 3 in a relatively rotatable manner, a seat cushion 5 supported by the seat frame 2, and a back portion. The back cushion 6 supported by the frame 3, the sacrum cushion 7 disposed between the seat cushion 5 and the back cushion 6 and corresponding to the position of the sacrum of the resident, and the respective cushions It is comprised from the cover (refer FIG. 3) to cover, and is formed so that reclining is possible.

  As shown in FIG. 1 (a), in the state where the back portion stands, the back portion B of the resident A contacts the back cushion 6, the buttocks C contacts the sacrum cushion 7, and the thigh D is the seat portion. It is in contact with the cushion 5. As shown in FIG. 1B, in the state in which the back cushion 6 is tilted backward, the buttocks C of the resident A slightly move to the back cushion 6 side, but most of the buttocks C are mostly sacral cushions. 7 is maintained. As shown in FIG. 1 (c), the heel part C has a sacrum at the center in the width direction and a sciata on both sides of the sacrum, and the sciata is covered with muscles. 1 (a) and 1 (b), the buttocks C are in contact with the sacrum cushion 7, and the sacrum cushion 7 supports the muscles of the buttocks C, particularly the sciatic muscles. The bottom of the sacrum is prevented.

  As described above, since the sacrum cushion 7 is independently provided in the portion corresponding to the sacrum position, even when the back cushion 6 is tilted backward during reclining, abdominal muscle movement, etc., the sacrum bottoming phenomenon occurs. It is possible to provide a seat chair having a structure that does not occur, has low resistance at the bent portion when the seat chair is bent, and does not break the bent portion.

  As shown in FIG. 2, the seat frame 2 and the back frame 3 are each formed of, for example, a pipe bent into a substantially U-shape, and the openings of the substantially U-shaped seat frame 2 and the back frame 3. The parts are butted together, a hinge 4 is arranged at the abutting part, and the hinges 4 are connected to each other through the hinges 4 so as to be rotatable.

  The seat cushion 5, the back cushion 6, and the sacrum cushion 7 are made of materials, structures, and shapes that take into account impact relaxation during sitting and abdominal muscle movement on a seat chair, etc. For example, a core material having a hardness similar to that of muscle (hardness according to JIS K6401A method), for example, 20N to 200N and a thickness of 10 to 70 mm is used. Moreover, as shown in FIG. 2, the seat cushion 5, the back cushion 6, and the sacrum cushion 7 are independent of each other, and extend in the longitudinal direction so that the sacrum does not contact the center in the width direction on the surface side. A longitudinal groove 8 is formed, and both sides thereof are formed in a raised convex shape so as to support muscles. The longitudinal groove 8 is essential for at least the sacral cushion 7, but is not essential for the seat cushion 5 and the back cushion 6. The structure of these cushions will be described later in detail.

  As described above, since the seat chair according to the present invention has the longitudinal groove 8 in the portion where the sacrum is located, the feeling of pressure on the sacrum can be reduced. Moreover, since a groove | channel is a vertical groove, even if a shift | offset | difference arises between a resident and the seat 1 at the time of reclining etc., this can be absorbed.

  As shown in FIG. 3, the seat frame 2, the back frame 3, and the hinge 4 are covered with a frame cover 10. In addition, the seat cushion 5 is covered with a seat cushion cover 11, and a portion that covers the seat frame 2 of the frame cover 10 between the bottom 11 b of the seat cushion cover 11 and the bottom 5 b of the seat cushion 5. 10a is telescopically inserted. For this reason, the seat cushion cover 11 is fixed to the seat frame 2. On the other hand, the back cushion 6 and the sacrum cushion 7 are also covered with the back cushion cover 12 and the sacrum cushion cover 13, respectively, but are relatively movable with respect to the back frame 3. Hereinafter, the cover of the present embodiment configured as described above may be referred to as an “independent cover”.

  Since the back cushion 6 and the sacrum cushion 7 are supported so as to be relatively movable with respect to the back frame 3, excessive stress is not applied to each cushion when the back cushion 6 is reclined. For this reason, not only the seat cushion 5 but also the back cushion 6 and the sacrum cushion 7 are reclined while maintaining the original shape.

  In addition, the seat cushion cover 11, the back cushion cover 12, and the sacrum cushion cover 13 are formed of a single fabric or a plurality of fabrics. The cover is configured to be connected via the upper surface portion. For this reason, although the seat cushion 5, the back cushion 6, and the sacrum cushion 7 are relatively foldable, the integrity is maintained.

  As shown in FIG. 3A, when the back cushion 6 stands upright, the sacrum (not shown) of the resident sacrum (not shown) is partly seated on the seat cushion 5 in addition to the sacrum cushion 7. It is located so as to straddle. Further, as shown in FIG. 3B, in a state where the back cushion 6 is tilted backward, the sacrum moves slightly to the back cushion 6 side, and most of the sacrum is in a position corresponding to the sacrum cushion 7. Thus, although the relative positional relationship between the occupant and the chair 1 is slightly shifted by the reclining, the longitudinal groove 8 is formed in the center portion in the width direction of the seat cushion 5, the back cushion 6, and the sacrum cushion 7. Because the sacrum is formed, the sacrum will not bottom out.

  In this embodiment, since it is a stand-alone cover, the back cushion 6 and the sacrum cushion 7 move relative to the back frame 3 as shown in FIGS. 3 (a) to 3 (b). 3A and 3B, no force such as a compressive force acts on the seat cushion 5, the back cushion 6, and the sacral cushion 7. In the state shown in FIG. For this reason, the sacral cushion 7 is not deformed and maintains its original shape. If the upper end of the back cushion cover 12 and the upper end of the frame cover 10 are connected by a flap 14 so as to cover both upper ends, the back cushion 6 can be moved relative to the back frame 3. It is safe to prevent the resident's hair from being pinched.

  Next, the structure of the cushion will be described with reference to FIG. As described above, the seat cushion 5, the back cushion 6, and the sacrum cushion 7 are independent of each other, and a longitudinal groove 8 extending in the longitudinal direction is provided at the center in the width direction on the surface side so that the sacrum does not contact. It is formed, and both sides are formed in a raised convex shape so that it can support muscles. The bottom side of these cushions has a substantially flat shape. As shown in FIGS. 4A, 4B, and 4C, the cross-sectional structures of the seat cushion 5, the back cushion 6, and the sacral cushion 7 are composed of a soft urethane foam layer in order from top to bottom. It is formed of an upper layer 20, an intermediate layer 21 made of a hard urethane foam layer or cloth, a first lower layer 22 made of a soft urethane foam layer, and a second lower layer 23 made of a soft urethane foam layer and covering the frame 23. ing.

  The hardness of the upper layer 20 is preferably set in a range of 50 to 150 N. When the intermediate layer 21 is a hard urethane foam layer, the hardness is 250 N or more. When the intermediate layer 21 is a cloth, the cloth is preferably selected from a nonwoven fabric or a canvas. Further, the intermediate layer 21 is located above the frames 2 and 3 and has a width that covers the frames 2 and 3. The hardness of the first lower layer 22 and the second lower layer 23 is preferably set in the range of 50 to 150 N, and the first lower layer 22 is located within the width of the frames 2 and 3, The lower layer 23 is located below the frames 2 and 3 and has a width that covers the frames 2 and 3.

  The seat cushion 5, the back cushion 6, and the sacral cushion 7 having the cross-sectional structure as described above are composed of a hard urethane foam layer in which body pressure is dispersed and impact is reduced by an upper layer 20 composed of a soft urethane foam layer. The intermediate layer 21 can stabilize the support. Further, the intermediate layer 21 is supported by the first lower layer 22 made of a soft urethane foam layer, and the second layer made of the soft urethane foam layer. Since the first lower layer 22 and the frames 2 and 3 are supported by the lower layer 23, the entire seat chair can be a soft support structure, and a comfortable seat can be provided.

  Next, an example for forming the vertical groove 8 will be described with reference to FIG. In FIG. 5A, the vertical groove 8 is configured by forming a recess at the center in the width direction of the upper layer 20. In this case, the vertical groove 8 can be formed by processing the center of the upper layer 20 in the width direction into a concave shape.

  In FIG. 5B, the vertical groove 8 is configured by removing the center of the upper layer 20 in the width direction. In this case, the vertical groove 8 can be easily configured by removing the center of the upper layer 20 in the width direction with a constant width by cutting or the like.

  In FIG. 5C, the longitudinal groove 8 removes the center of the upper layer 20 in the width direction and leaves the upper part of the removed portion, so that it is softer than the urethane foam constituting the upper layer 20, for example, a urethane foam having a hardness of 50 N or less. It is comprised by filling. In this case, although the vertical groove is shallow, soft urethane foam is filled below the vertical groove, so that the sacrum is sufficiently protected and the upper layer with the center removed has a sense of unity on the left and right. And the deformation of the shape of the upper layer can be prevented.

  A seat chair according to the second embodiment will be described with reference to FIG.

  FIGS. 6A and 6B are side views schematically illustrating a seat chair according to the second embodiment, in which FIG. 6A shows a state where the back portion stands and FIG. 6B shows a state where the back portion tilts backward. In the seat chair according to the first embodiment, the back cushion cover 12 is a stand-alone cover in which the back cushion cover 12 is relatively movable with respect to the back frame 3, whereas the seat chair according to the second embodiment has a back portion. Although it differs from the seat chair according to the first embodiment in that it is a fixed cover in which the back cushion cover 12 is fixed to the frame 3, other configurations are the same as the seat chair according to the first embodiment. Parts having the same configuration are denoted by the same reference numerals and description thereof is omitted.

  In the present embodiment, since it is a fixed cover, the back cushion cover 12 is fixed to the back frame 3, and the back cushion 6 cannot be moved relative to the back frame 3. The seat cushion cover 11 is fixed to the seat frame 2, and the sacral cushion cover 13 is not fixed to the seat frame 2 and the back frame 3.

  As shown in FIG. 6A, when the back cushion 6 stands, the sacral cushion 7 is compressed by being narrowed and compressed by the seat cushion 5 and the back cushion 6, and protrudes in a convex shape on the surface side. ing. In addition, as shown in FIG. 6B, the sacral cushion 7 is restored to a free state when the back cushion 6 is tilted backward. Thus, in the case of the present embodiment, the back cushion 6 can be reclined using the elastic deformation of the sacrum cushion 7, and the sacrum cushion 7 is compressed and raised when the back cushion 6 stands. , Sacrum can be further protected. Further, even when the back cushion 6 is tilted backward, it protects the sacrum as well as the independent cover.

  Next, a usage example of the headrest cushion will be described with reference to FIG. 7A shows an example of the headrest cushion 30 and the fixing member 31. In FIG. 7B, the cushion 30 is attached to the back cushion 6 via the fixing member 31 and the like. It is in a state of being mounted at the height of the head, and the resident can read the book in a relaxed state by leaning his / her head against the cushion 30. Further, as shown by the two-dot difference line, if the headrest cushion 30 is lowered to the height of the dentist's waist, the resident can relax while the cushion 30 supports the waist. At that time, if the seat cushion 5, the back cushion 6, and the spine cushion 7 are stretched horizontally, a stretching exercise or the like can be performed. In FIG. 7C, the headrest cushion 30 is fixed at a position corresponding to the leg of the dentist, the back cushion 6 is tilted backward to a position close to the horizontal, and the dentist has the cushion 30. The abdominal muscles can be exercised by hooking the foot.

  Next, an example of using the exercise form roller will be described with reference to FIG. FIG. 8A shows an example of the fixing member 41 for the foam roller 40, and in FIG. 8B, the foam roller 40 is in a state of being fitted in the vertical groove 8 of the back cushion 6. Further, in FIG. 8C, the back cushion 6 is tilted rearward, the tip of the seat cushion 5 is tilted upward, and the foam roller 40 is fixed to the seat cushion 5 via the fixing member 41. In FIG. 8D, the seat cushion 5, the back cushion 6, and the spine cushion 7 are in a horizontally extended state, and the foam roller 40 is inserted into the seat cushion 5, the back cushion 6, and It is in a state of being fitted in the longitudinal groove 8 of the isthmus cushion 7. FIG. 8E shows a state in which the foam roller 40 is fitted in the vertical groove 8, and the foam roller 40 is held in the vertical groove 8 in a stable state.

  As shown in FIGS. 8A to 8D, various exercises can be performed by placing the foam roller 40 at a desired position. Further, as shown in FIG. 8E, the rolling of the foam roller can be prevented by using the vertical groove 8.

  Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to these embodiments, and modifications and additions within the scope of the present invention are included in the present invention. It is.

  For example, in the above-described embodiment, the seat cushion 5, the back cushion 6, and the sacrum cushion 7 are each formed with a longitudinal groove 8 extending in the longitudinal direction so that the sacrum does not come into contact with the center in the width direction on the surface side. However, the present invention is not limited to this, and the seat cushion 5 and the back cushion 6 can be omitted if the sacrum can be protected without providing the longitudinal grooves 8. Moreover, although the case where both sides of the longitudinal groove 8 are formed in a raised convex shape so as to support muscles is described, the present invention is not necessarily limited thereto, and for example, a flat having a certain thickness Any shape may be used.

  For example, in the said Example, the cross-sectional structure of the seat part cushion 5, the back part cushion 6, and the sacrum part cushion 7 is the upper layer 20 comprised from a soft urethane foam layer in order from the top to the bottom, a hard urethane foam layer Or about the case where it is formed from four layers of the intermediate | middle layer 21 comprised from cloth, the 1st lower layer 22 comprised from a soft urethane foam layer, and the 2nd lower layer 23 comprised from the soft urethane foam layer and covering the flame | frame 23 Although explained, it is not limited to this. For example, the first lower layer 22 and the second lower layer 23 are formed as one layer, and the whole is formed from three layers. Moreover, you may change the hardness of each layer as needed.

DESCRIPTION OF SYMBOLS 1 Seat chair 2 Seat frame 3 Back frame 4 Hinge 5 Seat cushion 6 Back cushion 7 Sacral cushion 8 Vertical groove 10 Frame cover 11 Seat cushion cover 12 Back cushion cover 13 Sacrum cushion cover 20 Upper layer 21 Middle layer 22 First lower layer 23 Second lower layer 30 Headrest cushion 31 Fixing member 40 Foam roller 41 Fixing member

Claims (9)

  In a reclining seat chair in which a seat frame and a back frame are hinged, a seat cushion supported by the seat frame, a back cushion supported by the back frame, and the seat cushion; A seat chair comprising a sacrum cushion disposed between the back cushion and a portion corresponding to a sacral position.   The longitudinal groove extending in the longitudinal direction in the center of the width direction on the surface side is formed in at least the sacrum cushion among the seat cushion, the back cushion, and the sacrum cushion. Seat chair as described in.   The seat chair according to claim 1 or 2, wherein the seat cushion, the back cushion, and the sacrum cushion are covered with a cover, and at least the cover that covers the seat cushion is fixed to the seat frame. Child.   The seat cushion, the back cushion, and the sacral cushion have cross-sectional structures in order from top to bottom, an upper layer composed of a soft urethane foam layer, an intermediate layer composed of a hard urethane foam layer or cloth, and a soft urethane foam. The seat chair according to any one of claims 1 to 3, wherein the seat chair is formed of a first lower layer composed of layers and a second lower layer composed of a soft urethane foam layer and covering the frame.   The seat chair according to claim 4, wherein the longitudinal groove is formed by forming a concave portion in the center of the upper layer in the width direction.   The seat chair according to claim 4, wherein the longitudinal groove is formed by removing the center of the upper layer in the width direction.   5. The vertical groove is formed by removing the center of the upper layer in the width direction and filling a urethane foam softer than the urethane foam constituting the upper layer, leaving the upper portion of the removed portion. The listed chair.   The seat chair according to any one of claims 1 to 7, further comprising a headrest cushion, wherein the headrest cushion is movably provided at a position corresponding to a waist or a foot.   The seat chair according to any one of claims 1 to 8, further comprising a foam roller for exercise.

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