JP2011083308A - Cushion for chair - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent an ischial bone part and a thigh part from easily hurting and to prevent a user from getting tired easily even when sitting thereon for a long period of time by changing touch at the ischial bone part and the thigh part during sitting. <P>SOLUTION: A cushion for a chair includes a cushion body 1 having one piece portion 10 and the other piece portion 20 including a porous cushion material arranged separately from each other to form a groove 2 in a back and forth direction at the center, and supporting the ischial bone part and the thigh part during sitting, and a holding sheet 30 for holding the one piece portion 10 and the other piece portion 20. The one piece portion 10 and the other piece portion 20 are provided with inner side parts 12 and 22 formed on the side of the groove 2 on the border of boundary lines 11 and 21 in the back and forth direction passing through a position corresponding to the ischial bone part during sitting and outer side parts 13 and 23 formed continuously from the inner side parts 12 and 22, respectively. The specific gravity of the inner side parts 12 and 22 is formed to be greater than the specific gravity of the outer side parts 13 and 23, and the thickness of the outer side pats 13 and 23 is formed to be greater than the thickness of the inner side pats 12 and 22 at rear side parts 14 and 24 for supporting the ischial bone part at least of the inner side parts 12 and 22 and the outer side parts 13 and 23. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a chair cushion that is placed on a seat portion of a chair such as a wheelchair, a table chair, an office chair, a vehicle chair, a seat chair, etc., and supports the sciatic part and the thigh when seated. In particular, the present invention relates to a cushion for a chair useful for a patient such as a heel or a postpartum in which a groove is formed at a position corresponding to an anus when sitting.

Conventionally, as this kind of cushion for chairs, what was published in patent documents 1 (Unexamined-Japanese-Patent No. 2004-121603) is known, for example. As shown in FIG. 7, the chair cushion Ca is a piece made of a porous cushion material that is spaced apart from each other so as to form a groove 102 in the central front-rear direction and that supports the sciatic and thighs when seated. It has a holding sheet 103 that holds the one piece 100 and the other piece 101, as well as the part 100 and the other piece 101.
The one piece portion 100 and the other piece portion 101 are formed to be approximately half the size of the holding sheet 103 and are uniformly formed of the same material, and the thickness thereof is also uniformly formed. The lower surface of the other piece portion 101 is formed integrally with the upper surface of the holding sheet 103 with a predetermined interval, or the lower surfaces of the one piece portion 100 and the other piece portion 101 are separated with a predetermined interval via the planar fastener on the upper surface of the holding sheet 103. And detachably attached.

  When the chair cushion Ca is placed and seated on the seat portion of the chair, the one piece portion 100 and the other piece portion 101 support the ischial portion and the thigh portion. At this time, since the groove 102 is located at a position corresponding to the anus, the cushion material does not come into contact with the anus. Therefore, when a patient such as a heel or a postpartum sits down, the cushion material does not come into contact with the affected part. So that much patient can sit comfortably.

JP 2004-121603 A

  However, in this conventional chair cushion Ca, the one piece portion 100 and the other piece portion 101 are uniformly formed of the same material, and the thickness thereof is also uniformly formed. Therefore, there is a problem that the sciatica and thighs become painful and easily get tired when sitting for a long time.

  The present invention has been made in view of such problems, and the sciatic and thighs become painful even when sitting for a long time so that the feel at the sciatic and thighs during sitting changes. An object of the present invention is to provide a cushion for a chair which makes it difficult and hard to get tired.

  In order to achieve such an object, the cushion for a chair of the present invention is a porous cushion material that is spaced apart from each other so as to form a groove in the central front-rear direction and supports the sciatic and thighs when seated. And a cushion for a chair having a cushion body having a holding sheet for holding the one piece and the other piece, and each of the one piece and the other piece at the time of sitting. An inner part formed on the groove side with a boundary line in the front-rear direction passing through a position corresponding to the sciatica as a boundary, and an outer part continuously formed on the inner part, and the inner part and the outer part are provided. It is formed of the same material, and the specific gravity of the inner part is made larger than the specific gravity of the outer part, and the thickness of the outer part is larger than the thickness of the inner part in the rear side part supporting at least the ischial part of the inner part and the outer part. Thick shape It is the configuration.

  As a result, when the chair cushion of the present invention is placed and seated on the seat portion of the chair, the sciatic portion and the thigh portion are supported by the one piece portion and the other piece portion, and the groove is positioned at a position corresponding to the anus. To come. As a result, the groove is positioned at the position corresponding to the anus when sitting, so that the cushion material does not come into contact with the anus. Therefore, when a patient such as a sputum or postpartum is seated, the cushion material is placed on the affected area. Since there is no contact, the patient can sit comfortably. In this case, since the inner piece and the outer piece are formed of the same material and the specific gravity of the inner part is larger than the specific gravity of the outer part, the density of the inner part is the density of the outer part. It becomes higher and the inner part is formed to be harder than the outer part, so that the feel at the sciatic part and the thigh when sitting is different between the inner part and the outer part. Further, since the inner part is harder than the outer part, the outer part is slightly bent downward while sitting. Furthermore, since the thickness of the outer portion is larger than the thickness of the inner portion at the rear side portion of the one piece portion and the other piece portion, the feel at the sciatic portion and the thigh when seated is the inner portion and the outer portion. It becomes different in the department. Furthermore, since the outer portion is thicker than the inner portion, the inner portion is slightly bent downward while seated.

  That is, at the time of sitting, the feel at the sciatic part and the thigh is different between the inner part and the outer part due to the difference in hardness and thickness between the inner part and the outer part. And the outer portion bend each other, so that the cushion body is kept substantially flat and the feel at the sciatic and thigh portions is constantly changed. Therefore, even if it sits for a long time, it can make a sciatic part and a thigh difficult to hurt, and can make it hard to get tired. Moreover, since the cushion main body is kept substantially flat, a sense of stability and a feeling of use are not impaired.

And as needed, it is set as the structure which inclinedly formed the front side part of the said one piece part and the other piece part so that thickness might become thin gradually toward a front end.
Thereby, when sitting on the cushion body, the one piece and the other piece are formed so as to incline downward toward the front end, so that the one piece and the other piece can support this following the thigh. Since the thigh can be supported more reliably, the support can be stabilized. Therefore, the sitting posture becomes easier, and the stability and the feeling of use can be further improved.

If necessary, the holding sheet includes a base sheet and a pair of left and right bag portions provided on the upper side of the base sheet and storing the one piece portion and the other piece portion and spaced apart from each other by a predetermined distance. Is configured. Since only one piece and the other piece are stored in the bag, the cushion body can be manufactured relatively easily. Moreover, since the groove | channel of a predetermined space | interval will be formed between one piece part and another piece part only by accommodating one piece part and another piece part in a bag part, manufacture of a cushion main body is also facilitated also in this point be able to.
In this case, it is effective to form the bag portion so that it can be opened and closed. Since one piece part and the other piece part can be easily put in and out of the bag part, for example, the one piece part and the other piece part stored in the bag part are different from each other in specific gravity and thickness of the inner part and the outer part. And when it wants to replace with another piece part, it can replace easily, Therefore The one piece part and other piece part corresponding to a user can be selected.

Further, if necessary, the cover body is provided with a cover sheet that is secured to the upper surface of the cushion body via an attaching / detaching means and covers the upper surface of the cushion body.
As a result, it is possible to prevent the holding sheet from becoming dirty or damaged. In addition, since dirt and scratches due to use are attached to the cover sheet, it is only necessary to replace the cover sheet, thereby reducing the use cost. Furthermore, since the cover sheet covers the cushion body, the appearance after being placed on the chair can be improved.

Further, if necessary, the attaching / detaching means is constituted by a planar fastener, and the planar fastener is provided with one fastener provided on the upper surface of the cushion body and the other fastener provided on the lower surface of the cover sheet. It is composed.
Thereby, a detachable means can be made into a comparatively simple structure. Moreover, since it is a planar fastener, the other fastener can be attached to an appropriate position of the one fastener, so that the attachment position of the cover sheet can be finely adjusted by the thickness of one piece and the other piece and the width of the groove. The cover sheet can be attached to locations corresponding to the one piece portion and the other piece portion, and the cover sheet can be attached to and detached from the cushion body relatively easily.

Moreover, it is set as the structure which quilted the front-end part of the said cover sheet as needed.
Thereby, since the quilting process was carried out, the intensity | strength of the front-end part of a cover sheet can be raised, and the shape of a cover sheet can be hold | maintained so much. In addition, the front end portion of the cover sheet is easily bent, and accordingly, the cover sheet is bent corresponding to the front side of the chair, so that the cover sheet becomes familiar with the chair, and the feeling of use can be improved accordingly.

Further, if necessary, the cover sheet is placed on the seat portion of the chair having a seat portion and a backrest portion, and a gap is formed between the rear end portion of the seat portion and the lower end portion of the backrest portion. And mounting members for mounting.
Accordingly, when the chair cushion is attached to the chair in which a gap is formed between the rear end portion of the seat portion and the lower end portion of the backrest portion, the cover seat is attached to the chair via the attachment member. Since the cushion main body is fixed to the cover sheet, the cushion main body can be firmly attached to the chair.

Furthermore, if necessary, the holding member is provided so as to protrude rearward from the rear end of the cover sheet, is inserted into the gap of the chair, and is clamped and held by the seat portion and the backrest portion of the chair. And a fastening body for fastening the holding body to the cover sheet.
Thus, when the chair cushion is attached to the chair in which a gap is formed between the rear end portion of the seat portion and the lower end portion of the backrest portion, the chair cushion is placed on the chair seat portion, and the chair seat Insert the holding body into the gap between the back part and the back part. In this case, since only the holding body is inserted, the chair cushion can be attached to the chair relatively easily. In addition, the holding body is held and held by the seat portion and the backrest portion, and since this holding body is fixed to the cover sheet by the fixing body, the fixing body serves as a stopper, and the cover sheet is attached to the chair. The cushion body fixed to the cover sheet can be firmly fixed to the chair. Furthermore, since the holding body protrudes rearward from the rear end of the main body and is inserted into the gap, the holding body becomes buried between the seat portion and the backrest portion of the chair, so that the mounting member is difficult to see from the appearance. The appearance after the chair cushion is attached to the chair can be improved.

  According to the cushion for a chair of the present invention, when sitting, the sciatic part and the thigh are supported by one piece and the other piece, and the groove is positioned at a position corresponding to the anus, and the cushion material contacts the anus. Therefore, when a patient such as a saddle or a postpartum patient sits, the cushion material does not contact the affected part, and thus the patient can sit comfortably. In this case, due to the difference in hardness and thickness between the inner part and the outer part, the feel at the ischial part and the thigh part is different between the inner part and the outer part. Further, since the inner part and the outer part bend each other while sitting, the cushion main body is kept substantially flat and the feel at the sciatic part and the thigh always changes. Therefore, even if it sits for a long time, it can make a sciatic part and a thigh difficult to hurt, and can make it hard to get tired. Moreover, since the cushion main body is kept substantially flat, a sense of stability and a feeling of use are not impaired.

It is the disassembled perspective view which showed the cushion for chairs concerning embodiment of this invention, and was seen from the lower surface side. It is the disassembled perspective view which showed the cushion for chairs concerning embodiment of this invention, and was seen from the upper surface side. The one piece part or other piece part which concerns on embodiment of this invention is shown, (a) is a top view, (b) is a front view, (c) is a right view, (d) is a left view. It is a perspective view which attaches the chair cushion which concerns on embodiment of this invention to a chair. It is side surface sectional drawing shown in the state which attached the cushion for chairs concerning embodiment of this invention to the chair. BRIEF DESCRIPTION OF THE DRAWINGS The cushion for chairs concerning embodiment of this invention is shown, (a) is side sectional drawing, (b) is side sectional drawing shown in a use state. It is a figure which shows an example of the conventional cushion for chairs.

Hereinafter, a chair cushion according to an embodiment of the present invention will be described with reference to the accompanying drawings.
1 to 6 show a chair cushion C according to an embodiment of the present invention. The chair cushion C includes a cushion body 1, a cover sheet 40, and an attachment member 50. In the present embodiment, as shown in FIGS. 4 and 5, the chair cushion C has a seat portion Wa and a backrest portion Wb, and is between the rear end portion of the seat portion Wa and the lower end portion of the backrest portion Wb. It is used by being attached to and mounted on a seat Wa of a chair W in which a gap Wc is formed.

  As shown in FIGS. 1 to 6, the cushion body 1 is made of a porous cushion material that is spaced apart from each other so as to form a groove 2 in the central front-rear direction and supports the sciatic and thighs when seated. While having the one piece part 10 and the other piece part 20, it has the holding sheet 30 holding the one piece part 10 and the other piece part 20, and is comprised.

  The one piece portion 10 is formed in a rectangular shape and is continuously formed on the inner side portion 12 and the inner side portion 12 that are formed on the groove 2 side with a boundary line 11 in the front-rear direction passing through a position corresponding to the ischial portion at the time of sitting. The outer portion 13 is provided. Both the inner part 12 and the outer part 13 are made of urethane, and the specific gravity of the inner part 12 is larger than the specific gravity of the outer part 13. Further, in the rear side portion 14 that supports at least the ischial portion of the inner side portion 12 and the outer side portion 13, the thickness of the outer side portion 13 is formed to be thicker than the thickness of the inner side portion 12, and a step due to the difference in thickness is one piece. It is formed on the lower surface 16 of the part 10. Further, the lower surface 16 of the one piece portion 10 is inclined so that the front side portion 15 gradually becomes thinner toward the front end 15a. Furthermore, this one piece part 10 is accommodated in the bag (not shown) which consists of a breathable cloth material.

  Specifically, in the embodiment, the one-piece portion 10 is formed in a rectangular shape having a length in the left-right direction of 170 mm and a length in the front-rear direction of 300 mm. The inner portion 12 constituting the one piece portion 10 has a left-right length of 80 mm, a rear side portion 14 length of 150 mm, a front side portion 15 length of 150 mm, and a rear end of the rear side portion 14. The thickness H1 of 14a is 25 mm, and the thickness H2 of the front end 15a of the front side portion 15 is 10 mm. Further, the outer side portion 13 has a left-right length of 90 mm, a rear side portion 14 has a front-rear direction length of 150 mm, a front side portion 15 has a front-rear direction length of 150 mm, and a rear end 14 a has a thickness H3. Is 30 mm, and the front end 15 a of the front side portion 15 is formed in a rectangular shape with a thickness H4 of 10 mm.

  That is, the inner portion 12 and the outer portion 13 are formed of the same material, and the specific gravity of the inner portion 12 is greater than the specific gravity of the outer portion 13, so that the density of urethane in the rear side portion 14 of the inner portion 12 is increased. Is higher than the density of urethane in the rear side portion 14 of the outer side portion 13, so that the rear side portion 14 of the inner side portion 12 is formed to be harder than the rear side portion 14 of the outer side portion 13.

  The other piece portion 20 is formed in a rectangular shape, and is continuously formed on the inner portion 22 and the inner portion 22 formed on the groove 2 side with a boundary line 21 in the front-rear direction passing through a position corresponding to the ischial portion at the time of sitting. The outer part 23 is provided. Both the inner part 22 and the outer part 23 are made of urethane, and the specific gravity of the inner part 22 is larger than the specific gravity of the outer part 23. In addition, in the rear side portion 24 that supports at least the ischial portion of the inner side portion 22 and the outer side portion 23, the thickness of the outer side portion 23 is formed to be greater than the thickness of the inner side portion 22. It is formed on the lower surface 26 of the part 10. Further, the lower surface 26 of the one piece portion 10 is inclined so that the front side portion 25 gradually becomes thinner toward the front end 25a. Furthermore, the other piece 20 is accommodated in a bag (not shown) made of a breathable cloth material.

  Specifically, in the embodiment, the other piece 20 is formed in a rectangular shape having a length in the left-right direction of 170 mm and a length in the front-rear direction of 300 mm. The inner portion 22 constituting the other piece portion 20 has a lateral length of 80 mm, a rear side portion 24 having a front-rear direction length of 150 mm, a front side portion 25 having a front-rear direction length of 150 mm, and a rear side portion 24 rearward. A thickness H1 of the end 24a is 25 mm, and a thickness H2 of the front end 25a of the front side portion 25 is 10 mm. Further, the outer side portion 23 has a left-right direction length of 90 mm, a rear side portion 24 has a front-rear direction length of 150 mm, a front side portion 25 has a front-rear direction length of 150 mm, and a thickness H3 of the rear end 24a of the rear side portion 24. Is 30 mm, and the front end 25a of the front side portion 25 is formed in a rectangular shape with a thickness H4 of 10 mm.

  That is, the inner portion 22 and the outer portion 23 are formed of the same material, and the specific gravity of the inner portion 22 is greater than the specific gravity of the outer portion 23. Therefore, the density of urethane in the rear side portion 24 of the inner portion 22 is increased. Is higher than the density of urethane in the rear side portion 24 of the outer side portion 23, so that the rear side portion 24 of the inner side portion 22 is formed to be harder than the rear side portion 24 of the outer side portion 23.

  The holding sheet 30 includes a base sheet 31 and a pair of left and right bag portions 32 that are provided on the upper side of the base sheet 31 and store the one piece portion 10 and the other piece portion 20 and are spaced apart from each other by a predetermined distance. ing.

  The base sheet 31 is formed in a rectangular shape having a length in the left-right direction of 420 mm and a length in the front-rear direction of 320 mm, and a frame 31 a of 10 mm is formed on the outer peripheral edge. Further, the pair of bag portions 32 are formed with a length in the left-right direction of 170 mm and a length in the front-rear direction of 300 mm, and are provided along the frame 31a. The pair of bag portions 32 are provided so as to be separated from each other by 60 mm, and when the one piece portion 10 and the other piece portion 20 are respectively stored in the pair of bag portions 32, the length in the left-right direction in the front-rear direction of the center of the base sheet 31. Groove 2 having a length of 60 mm and a length of 320 mm in the front-rear direction is formed.

  The bag portion 32 is formed on the holding sheet 30 so as to be opened and closed via an opening / closing means 33. Specifically, a fastener 33 a as an opening / closing means 33 is provided on the lower surface 34 of the holding sheet 30, and the one piece 10 and the other piece 20 can be taken in and out of the bag portion 32 by opening and closing the fastener 33 a.

  As shown in FIGS. 1, 2 and 4 to 6, the cover sheet 40 covers the upper surface 3 of the cushion body 1, and is attached to the upper surface 3 of the cushion body 1 via an attaching / detaching means 43. Yes. This cover sheet 40 is formed in a rectangular shape with a length in the left-right direction of 470 mm and a length in the front-rear direction of 450 mm, and its front end 41 is quilted.

  The attachment / detachment means 43 is constituted by a planar fastener 44. Specifically, the planar fastener 44 is configured to include one fastener 44 a provided on the upper surface 3 of the cushion body 1 and the other fastener 44 b provided on the lower surface 45 of the cover sheet 40.

  On the other hand, the fastener 44 a is formed in a rectangular shape extending in the front-rear direction of the holding sheet 30, and is bilaterally symmetric about the center of the base sheet 31 that forms the groove 2 and the center of the base sheet 31 on the upper surface 3 of the holding sheet 30. A pair of bag portions 32 are provided at positions.

  The other fastener 44 b is formed in a rectangular shape extending in the front-rear direction of the cover sheet 40, and is provided on the lower surface 45 of the cover sheet 40 at the center of the cover sheet 40, and is bilaterally symmetric about the center of the cover sheet 40. A pair is provided at the position.

  As shown in FIGS. 1, 2, 4, and 5, the attachment member 50 protrudes rearward from the rear end 42 of the cover sheet 40 and is inserted into the gap Wc of the chair W to be seated Wa of the chair W. And a holding body 51 that is held and held by the backrest portion Wb, and a fastening body 52 that fastens the holding body 51 to the cover sheet 40.

  The holding body 51 is formed in a rod shape using an elastic member that can be elastically deformed. In the present embodiment, the holding body 51 is formed of a resin pipe.

  The fastening body 52 is formed of a flexible belt-like member extending from the holding body 51 and having front and back surfaces in a direction parallel to the axial direction of the holding body 51, and is attached to the lower surface 45 of the cover sheet 40 via fastening means 54. And is detachably fastened. In the embodiment, the fixing body 52 is provided with a bag-like storage portion 53 for storing the holding body 51 at one end portion 50a thereof, and the holding body 51 made of a resin pipe is stored in the storage portion 53. .

  The fastening means 54 is constituted by a planar fastener 55. Specifically, the planar fastener 55 includes one fastener 55 a provided on the lower surface 45 of the cover sheet 40 and the other fastener 55 b provided on the fastening body 52 of the attachment member 50.

On the other hand, the fastener 55a is formed in a rectangular shape that extends in the left-right direction of the cover sheet 40, and is provided in the central portion on the rear end 42 side of the cover sheet 40 so as to extend in the left-right direction along the rear end edge of the cover sheet 40. .
On the other hand, the fasteners 55 b are formed in a rectangular shape extending in the direction along the longitudinal direction of the fastening body 52, and a pair of fasteners 55 b are provided at both left and right ends of the fastening body 52.

Further, when the attachment member 50 is manufactured, the belt-shaped member is appropriately cut and sewn to form a bag-like accommodation portion 53 at one end portion 50a, and a resin pipe as the holding body 51 is accommodated in the accommodation portion 53 and stitched. To do. In this case, since the holding body 51 is only accommodated in the accommodating portion 53, the attachment member 50 is manufactured relatively easily. Further, since the holding body 51 is formed of a resin pipe, the holding body 51 can be manufactured at a relatively low cost.
Moreover, since the cover sheet 40 and the attachment member 50 are separately prepared at the time of manufacture, manufacture is performed very easily compared with the case where it manufactures integrally.

  Therefore, when the chair cushion C according to this embodiment is attached to the chair W, first, the cushion body 1 is formed by housing the one piece portion 10 and the other piece portion 20 in the bag portion 32. In detail, the fastener 33a of the bag part 32 of the cushion main body 1 is opened, the one piece part 10 and the other piece part 20 are accommodated in the bag part 32, and the fastener 33a is closed. In this case, since only the one piece 10 and the other piece 20 are stored in the bag portion 32, the formation of the cushion body 1 is relatively easy. Moreover, since the groove | channel 2 of a predetermined space | interval will be formed between the one piece part 10 and the other piece part 20 only by accommodating the one piece part 10 and the other piece part 20 in the bag part 32, a cushion main body also in this point 1 can be easily formed. Further, since the bag portion 32 is formed so as to be openable and closable, the one piece portion 10 and the other piece portion 20 can be easily put in and out of the bag portion 32.

  Next, the attachment member 50 is attached to an appropriate portion of the cover sheet 40 by the fastening means 54. In this case, since the one fastener 55a is provided extending in the left-right direction along the rear edge of the cover sheet 40, the other fastener 55b can be attached to an appropriate position of the one fastener 55a. Since the left and right positions of the chair W can be finely adjusted, it can be attached to a location corresponding to the shape of the seat Wa of the chair W or the shape of the gap Wc, and the fastening means 54 has a relatively simple configuration. Since the fastener 55 is used, the attachment member 50 can be attached to and detached from the cover sheet 40 relatively easily, and the handling becomes extremely easy.

  Then, the cover sheet 40 to which the attachment member 50 is attached is attached to the cushion body 1 by the attaching / detaching means 43. The one fastener 44a provided in the center of the base sheet 31 and the other fastener 44b provided in the center of the cover sheet 40 are attached in correspondence with each other, and the pair of one fastener 44a provided in the pair of bag portions 32 and the cover sheet. A pair of other fasteners 44b provided at left and right symmetrical positions around the center of 40 are attached in correspondence with each other. In this case, since the attaching / detaching means 43 is a planar fastener 44 having a relatively simple configuration, the other fastener 44b can be attached to an appropriate position of the one fastener 44a. Since the attachment position of the cover sheet 40 can be finely adjusted according to the thickness and the width of the groove 2, the cover sheet 40 can be attached to a location corresponding to the one piece 10 and the other piece 20, and the cushion of the cover sheet 40 The attachment and detachment to the main body 1 can be performed relatively easily, and the handling becomes extremely easy.

  4 and 5, the chair cushion C is placed on the seat Wa of the chair W, and the holding body 51 is inserted into the gap Wc between the seat Wa of the chair W and the backrest Wb. In this case, since only the holding body 51 is inserted, the chair cushion C can be attached to the chair W relatively easily. Further, since the holding body 51 is formed of an elastic member in a rod shape, the holding body 51 can be easily inserted into the gap Wc, and even if the chair W is formed with a narrow gap Wc, the holding body 51 is elastically deformed and inserted. Therefore, the holding body 51 can be reliably inserted into the gap Wc.

  In this state, as shown in FIG. 5, the holding body 51 is held and held by the seat portion Wa and the backrest portion Wb, and the holding body 51 is fixed to the cover sheet 40 by the fixing body 52. The fastening body 52 serves as a stopper, and the cover sheet 40 is firmly fixed to the chair W. Since the cushion body 1 is fixed to the cover sheet 40, the cushion body 1 can be firmly fixed to the chair W. Further, since the fastening body 52 is fastened to the lower surface 45 of the cover sheet 40, the fastening body 52 is held between the cushion body 1 and the cover sheet 40, so that the fastening body 52 is covered. The seat 40 can be securely fixed, and the cushion body 1 and the cover sheet 40 are firmly fixed to the chair W. Furthermore, since the fastening body 52 is a flexible member, it comes to fit to the rear end part of the seat part Wa of the chair W. Therefore, the cushion body 1 and the cover sheet 40 are more securely attached to the seat part Wa of the chair W. Can be attached to.

  Further, since the holding body 51 protrudes rearward from the rear end 42 of the cover sheet 40 and is inserted into the gap Wc, the holding body 51 comes to be buried between the seat portion Wa and the backrest portion Wb of the chair W. The member 50 becomes difficult to see from the appearance, and accordingly, the appearance after the chair cushion C is attached to the chair can be improved.

  When seated on the chair cushion C of the present invention attached in this manner, as shown in FIG. 6 (b), the sciatic part and the thigh are supported by the one piece 10 and the other piece 20, and the groove 2 Is located at a position corresponding to the anus. Thus, when seated, the groove 2 comes to be positioned at a position corresponding to the anus, so that the cushion material does not come into contact with the anus. Therefore, when a patient such as a sputum or postpartum is seated, the cushion material is placed on the affected part. Since it does not touch, the patient can sit comfortably. In this case, the inner part 12 and 22 of the one piece part 10 and the other piece part 20 are formed to be harder than the outer parts 13 and 23, so that the feeling at the sciatic part and thigh at the time of sitting is the inner parts 12 and 22. And the outer portions 13 and 23 are different. Further, since the inner portions 12 and 22 are harder than the outer portions 13 and 23, the outer portions 13 and 23 are slightly bent downward while sitting. Further, the one piece portion 10 and the other piece portion 20 are formed such that the thickness of the outer side portions 13 and 23 is larger than the thickness of the inner side portions 12 and 22 in the rear side portions 14 and 24. The feel at the thigh is different between the inner parts 12 and 22 and the outer parts 13 and 23. Furthermore, since the outer portions 13 and 23 are thicker than the inner portions 12 and 22, the inner portions 12 and 22 are slightly bent downward while sitting.

  That is, when seated, due to the difference in hardness and thickness between the inner parts 12 and 22 and the outer parts 13 and 23, the feeling at the sciatic part and the thigh is different between the inner parts 12 and 22 and the outer parts 13 and 23. During the sitting, the inner parts 12, 22 and the outer parts 13, 23 bend each other, so that the cushion body 1 is kept substantially flat and the feel at the sciatic and thigh parts is always maintained. To change. Therefore, even if it sits for a long time, it can make a sciatic part and a thigh difficult to hurt, and can make it hard to get tired. In addition, since the cushion body 1 is kept substantially flat, the sense of stability and the feeling of use are not impaired.

  Furthermore, when sitting on the chair cushion C, the one piece 10 and the other piece 20 are formed so as to incline downward toward the front ends 15a, 25a, so that the one piece 10 and the other piece 20 are the thighs. The thighs can be supported more reliably, and the support can be stabilized. Therefore, the sitting posture becomes easier, and the more stable and comfortable to use. Can be improved.

  Furthermore, since the front end portion 41 of the cover sheet 40 is quilted, the strength of the front end portion 41 of the cover sheet 40 can be increased, and the shape of the cover sheet 40 can be maintained accordingly. Further, the front end portion 41 of the cover sheet 40 is easily bent due to the quilting process, so that the cover sheet 40 is adapted to the front side of the chair W, so that the cover sheet 40 becomes familiar with the chair W, The feeling of use can be improved accordingly. Furthermore, the cover sheet 40 can prevent the holding sheet 30 from becoming dirty or damaged. That is, dirt and scratches due to use are attached to the cover sheet 40. In this case, it is only necessary to replace the cover sheet 40, so that the use cost can be reduced. Furthermore, since the cover sheet 40 covers the cushion body 1, the appearance when placed on the chair W can be improved.

  Further, since the attachment member 50 is attached by attaching the fixing body 52 to the lower surface 45 of the cover sheet 40, the fixing body 52 does not get in the way when seated, and the feeling of use is improved accordingly. Further, when the mounting member 50 is deteriorated or damaged during use, only the mounting member 50 can be replaced. Therefore, the mounting member 50 is formed in the cover sheet 40 as compared with the case where the mounting member 50 is integrally formed. Maintenance becomes easy. Furthermore, even if the sciatic part and the thigh are about to move back and forth and right and left when sitting, the cushion body 1 and the cover sheet 40 are firmly attached to the chair W by the attachment member 50. It is possible to prevent the cushion body 1 and the cover sheet 40 from slipping forward from Wa.

  Moreover, since the cushion 32 for chairs of this invention can open and close the bag part 32, the one piece part 10 and the other piece part 20 from which the specific gravity and thickness of the inner side parts 12 and 22 and the outer side parts 13 and 23 differ are prepared. The replacement one piece 10 and the replacement other piece 20 can also be formed by storing them in the bag portion 32. That is, for example, the one piece portion 10 and the other piece portion 20 housed in the bag portion 32 are replaced with the one piece portion 10 and the other piece portion 20 having different specific gravity and thickness of the inner portions 12 and 22 and the outer portions 13 and 23. If desired, it can be easily replaced, so that the one piece 10 and the other piece 20 corresponding to the user can be selected.

  For example, the replacement piece 10 and the replacement other piece 20 have the same length in the left-right direction and the length in the front-rear direction, and the inner part 12 is located behind the rear side part 14. The thickness H1 of the end 14a is 20 mm, the thickness H2 of the front end 15a of the front side portion 15 is 5 mm, the outer portion 13 is 25 mm in thickness of the rear end 14a of the rear side portion 14 and the front end of the front side portion 15 The thickness H4 of 15a is formed to be 5 mm, the replacement other piece 20 has the same length in the left-right direction and the length in the front-rear direction, and the inner side 22 is the rear end 24a of the rear side 24. The thickness H1 is 20 mm, the thickness H2 of the front end 25a of the front side portion 25 is 5 mm, the outer portion 23 is a thickness H3 of the rear end 24a of the rear side 24, and the thickness of the front end 25a of the front side 25 is 25 mm. The length H4 is 5 mm.

  When the replacement one piece 10 and the replacement other piece 20 are stored in the bag portion 32, the fastener 33a of the bag portion 32 of the cushion body 1 is opened, and the stored one piece 10 and the other piece portion 20 are removed. Take out. Then, the replacement one piece portion 10 and the replacement other piece portion 20 are accommodated in the bag portion 32 and the fastener 33a is closed. In this case, since the bag portion 32 can be opened and closed, the one piece portion 10 and the other piece portion 20 can be easily put in and out of the bag portion 32.

  When the replacement one piece 10 and the replacement other piece 20 are stored in the bag portion 32, the depth of the groove 2 (thickness of the inner portions 12, 22 of the one piece 10 and the other piece 20) becomes shallow, and the chair Since the cushion C for use becomes flatter, the sitting comfort is improved, so that the feeling of use can be further improved. In particular, the chair cushion C according to the present invention is optimal for use by patients such as bags and postpartum patients, but the depth of the groove 2 (the inner part 12 of the one piece 10 and the other piece 20, depending on the patient, By selecting (thickness of 22), it is possible to further improve the feeling of use.

  In addition, when not in use, the fastening body 52 can be removed by the fastening means 54 and the mounting member 50 can be removed from the cover sheet 40. For example, when not used for the chair W, the mounting member 50 becomes an obstacle. Therefore, the cushion body 1 can be used in various ways, for example, in place of a cushion, so that versatility is improved accordingly.

  In the above embodiment, the chair cushion C has the seat portion Wa and the backrest portion Wb, and the chair W has the gap Wc formed between the rear end portion of the seat portion Wa and the lower end portion of the backrest portion Wb. However, the present invention is not necessarily limited to this. For example, the chair W may not be formed with the gap Wc, and the chair W may not have the backrest Wb. It can be changed as appropriate. In this case, the attachment member 50 may be removed from the cover sheet 40 and only the cushion body 1 and the cover sheet 40 may be placed on the seat Wa of the chair W and used.

In addition, the dimension of the one piece part 10, the other piece part 20, the holding | maintenance sheet | seat 30, and the cover sheet | seat 40 in the said embodiment is not limited to an above-described thing, It can change suitably according to the chair W to attach.
Moreover, in the said embodiment, although the one piece part 10 and the other piece part 20 were formed with urethane, it is not necessarily limited to this, What is necessary is just a porous cushion material, and it may change suitably.

C Cushion for chair W Chair Wa Seat part Wb Backrest part Wc Gap 1 Cushion body 2 Groove 3 Upper surface 10 One piece 11 Boundary line 12 Inner part 13 Outer part 14 Rear side part 14a Rear end 15 Front side part 15a Front end 16 Lower face 20 Other piece Portion 21 boundary line 22 inner portion 23 outer portion 24 rear side portion 24a rear end 25 front side portion 25a front end 26 lower surface 30 holding sheet 31 base sheet 31a frame 32 bag portion 33 opening / closing means 33a fastener 34 lower surface 40 cover sheet 41 front end portion 42 rear End 43 Attaching / detaching means 44 Planar fastener 44a One fastener 44b Other fastener 45 Lower surface 50 Mounting member 50a One end 51 Holding body 52 Fastening body 53 Holding section 54 Fastening means 55 Planar fastener 55a One fastener 55b The other fastener

Claims (9)

The one piece part and the other piece, which are arranged apart from each other so as to form a groove in the central front-rear direction and are made of a porous cushion material that supports the sciatic part and the thigh part when seated, and the one piece part and the other piece In a cushion for a chair provided with a cushion body having a holding sheet for holding a part,
Each of the one piece part and the other piece part is formed on the groove side with respect to a boundary line in the front-rear direction passing through a position corresponding to the sciatica portion when sitting, and an outer side formed continuously on the inner part. A rear side that is formed of the same material and has a specific gravity greater than the specific gravity of the outer part and supports at least the ischial part of the inner part and the outer part. A chair cushion, wherein the outer portion is thicker than the inner portion.   2. The chair cushion according to claim 1, wherein the front side portions of the one piece portion and the other piece portion are formed so as to be gradually inclined toward the front end.   The holding sheet includes a base sheet, and a pair of left and right bag portions provided on the upper side of the base sheet and storing the one piece portion and the other piece portion and spaced apart from each other by a predetermined distance. The chair cushion according to claim 1 or 2.   The chair cushion according to claim 3, wherein the bag portion is formed to be openable and closable.   The chair cushion according to any one of claims 1 to 4, further comprising a cover sheet that is secured to the upper surface of the cushion body via an attaching / detaching means and covers the upper surface of the cushion body.   The attaching / detaching means is constituted by a planar fastener, and the planar fastener is provided with one fastener provided on the upper surface of the cushion body and the other fastener provided on the lower surface of the cover sheet. The cushion for a chair according to claim 5.   The chair cushion according to claim 5 or 6, wherein a front end portion of the cover sheet is quilted.   Mounting member for mounting and mounting the cover sheet on the seat portion of the chair having a seat portion and a backrest portion and a gap formed between the rear end portion of the seat portion and the lower end portion of the backrest portion The chair cushion according to claim 5, wherein the chair cushion is provided.   A holding body that protrudes rearward from the rear end of the cover sheet, is inserted into a gap of the chair, and is held and held by a seat portion and a backrest portion of the chair, and the holding body is The cushion for a chair according to claim 8, comprising a fastening body fastened to the cover sheet.

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