JP2012115411A - Seat device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seat device which allows a sitting feeling and a whole design to be changed easily.SOLUTION: Detachable pads 51, 52 are interchangeable with respect to seat body parts 11, 21 in the seat device. The seat body parts 11, 21 has main parts 15, 25 to be the sitting portions of a sitting person and right and left side parts 16, 26 which are so arranged on both sides of the main parts 15, 25 as to be raised therefrom. The detachable pads 51, 52 are so fitted in between the right and left side parts 16, 26 as to be interchangeable with respect to the seat body parts 11, 21.

Description

  The present invention relates to a seat device that is used for automobiles, furniture, and the like, and particularly relates to a seat device that can easily change sitting comfort and design at the time of sitting.

  In automobile seats, it is required that the ride comfort and design can be changed. In order to meet this need, the structures described in Patent Documents 1 and 2 have been conventionally developed.

  In the structure described in Patent Document 1, a portion of the seat cover that covers the seat back and the headrest is used as a bag body, and the bag body and the portion that covers the seat cushion are stitched together to integrate the seat cover. Can be easily replaced. The structure described in Patent Document 2 enables a dressing seat cover to be covered with a seat cushion whose pad is covered with an outer skin, and the seat cushion side in a state where the dressing seat cover is not covered. It has a structure that prevents a fastener or the like from being caught on the clothes of the seated person.

Japanese Utility Model Publication No. 6-36450 JP 2009-153560 A

  However, in the structures of Patent Documents 1 and 2, it is possible to change the color of the seat by exchanging the seat cover, but it is possible to change the seat comfort of the seat itself to the seated person, There are inconveniences that cannot be changed, and further improved to improve the seating feeling.

  The present invention has been made in consideration of such problems, and can easily change seating comfort and the overall design, and can easily be changed according to the needs of the user. The purpose is to provide.

  The seat device of the present invention is a seat device in which a dressing pad can be exchanged with respect to a seat body portion, and the seat body portion is high on both sides of the main portion and the main portion serving as a seating area for a seated person. It comprises left and right side portions provided, and the dressing pad is exchangeable between the left and right side portions so that the seat main body portion can be replaced.

In this case, it is preferable that the inner side surfaces of the left and right side portions and the left and right outer surfaces of the dress-up pad have a concavo-convex shape that fits into each other.
In addition, it is preferable that engaging members are attached to the inner side surfaces of the left and right side portions and the left and right outer surfaces of the dressing pads.
Further, an engaging convex portion is formed on the main portion, an engaging concave portion is formed on the dressing pad, and the engaging convex portion and the engaging concave portion are fitted to each other so that the dressing pad can be replaced on the main portion. It is preferred that
Moreover, it is preferable that the dress-up pad is replaceable with respect to the seat body in a state where the front and back sides are reversed.
In addition, it is preferable that the dressing pad has a seat portion and a backrest portion connected to each other, and the seat portion and the backrest portion are integrated with each other so that the seat body portion can be replaced.
Moreover, it is preferable that a temperature control member can be attached to the seating side of the dressing pad.
The dress-up pad is preferably formed by a pad body made of a cushion pad and a skin covering the pad body.

  According to the present invention, the dress-up pad is provided in the main portion of the seat body by fitting the dress-up pad into the side portion of the seat body. With such a structure, the dress-up pad can be easily exchanged for the seat body. At this time, it is possible to change the seating comfort and the design of the entire seat by exchanging with a dress-up pad whose color and cushioning properties are changed, and it is possible to make changes according to the needs of the user.

It is a disassembled perspective view which shows the sheet | seat apparatus of 1st Embodiment of this invention. It is a perspective view showing the whole sheet device of a 1st embodiment. It is a disassembled perspective view which shows the sheet | seat apparatus of 2nd Embodiment of this invention. It is a top view which shows the sheet | seat apparatus of 3rd Embodiment of this invention. It is a front view which shows the sheet | seat apparatus of 3rd Embodiment. It is the II sectional view taken on the line in FIG. (A), (b), (c), (d) is each sectional drawing in the EE line, FF line, GG line, and HH line in FIG.4 and FIG.5. It is the L section expanded sectional view in Drawing 7 (c). It is sectional drawing which shows the sheet | seat apparatus of 4th Embodiment of this invention, (a) is sectional drawing corresponding to the EE line of FIG. 7, (b) is sectional drawing corresponding to the GG line of FIG. It is. It is the M section expanded sectional view in Drawing 9 (b). It is a perspective view of the dress-up pad applied to the seat apparatus of each embodiment of the present invention. It is sectional drawing of the dress-up pad which can be reversed front and back. It is a perspective view of the dress-up pad which the seat part and the backrest part connected. It is a perspective view of the dress-up pad provided with the temperature control member.

  Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments. In each embodiment, the same member is assigned the same reference numeral.

(First embodiment)
1 and 2 show a first embodiment of a seat apparatus 1 according to the present invention. The seat device 1 is a seat used for an automobile, and is entirely disposed on a vehicle body floor (not shown). The seat device 1 includes a seat cushion 3, a seat back 4 provided on the rear side of the seat cushion 3, and a dressing pad 50 that can be replaced by being attached to and detached from the seat cushion 3 and the seat back 4. And.

  The seat cushion 3 has a cushion-side main body 11 provided so that a pad covers a cushion frame (not shown). The entire seat cushion 3 can be moved in the front-rear direction on the vehicle floor by being attached to the slide rail 12 on the vehicle floor. The cushion side main body portion 11 is formed by a main portion 15 serving as a seating site for a seated person and side portions 16 provided integrally on both the left and right sides of the main portion 15.

In this embodiment, the main portion 15 of the cushion-side main body portion 11 is recessed such that the upper surface 15a is somewhat lower than the seat cushion of a normal automobile seat, and the dressing pad 50 is the upper surface 15a of the main portion 15. Placed on. By this placement, the height becomes the same as the upper surface of the seat cushion of a normal automobile seat. The left and right side portions 16 are portions that support the waist and thigh portions of the seated person from the left and right, and are provided so as to be higher than the main portion 15. Since the left and right side portions 16 are higher than the main portion 15, the dress-up pad 50 can be fitted between the left and right main portions 16.

  The seat back 4 is the same as the seat cushion 3, and has a back-side main body portion 21 provided so that a pad covers a cushion frame (not shown). The seat back 4 is tiltably supported by the seat cushion 3 via a reclining mechanism (not shown) so that the angle can be adjusted. Reference numeral 22 denotes a lifter lever operated to adjust the height of the seat cushion 3, and reference numeral 6 denotes a headrest attached to the upper portion of the seat back 4. The back side main body portion 21 is also formed by a main portion 25 as a seating portion for seating the back of the seated person and side portions 26 integrally provided on both the left and right sides of the main portion 25.

In this embodiment, the main portion 25 of the back-side main body portion 21 is recessed such that the upper surface (front surface) 25a is somewhat lower than the seat back of a normal automobile seat, and the dress-up pad 50 is the main portion 25. It becomes the same height as the seat back of a normal automobile seat by being placed on the upper surface 25a of the vehicle. The left and right side portions 26 are portions that support the left and right arm portions of the seated person from the left and right, and are provided so as to be higher than the main portion 25. Since the left and right side portions 26 are higher than the main portion 25, the dress-up pad 50 can be fitted between the left and right main portions 26.

  In the above structure, the cushion main body 11 and the back main body 21 are combined to form the seat main body 2.

  The dress-up pad 50 includes a cushion-side pad 51 that is replaceable with respect to the cushion-side main body 11 and a back-side pad 52 that is replaceable with respect to the back-side main body 21. These pads 51 and 52 are formed of two parts, a first part 51a and 52a and a second part 51b and 52b, respectively. The first part 51a of the cushion-side pad 51 corresponds to the buttocks of the seated person, and the second part 51b supports these parts corresponding to the thigh of the seated person. The first part 52a of the back pad 52 corresponds to the back part of the seated person, and the second part 52b supports these parts corresponding to the shoulder part of the seated person.

  The lateral widths of the first part 51a and the second part 51b of the cushion side pad 51 are substantially equal to the width of the main part 15 of the cushion side main body part 11 (interval between the left and right side parts 16), and these parts 51a. , 51b can be fitted between the left and right side portions 16 of the cushion-side main body portion 11. By fitting the parts 51 a and 51 b between the left and right side parts 16, the cushion side pad 51 can be attached on the main part 15 of the cushion side main body part 11. Further, by removing the parts 51 a and 51 b from between the left and right side portions 16, it can be replaced with another cushion side pad 51.

  The back-side pad 52 is the same as the cushion-side pad 51, and the lateral width of the first part 52a and the second part 52b is substantially the same as the width of the main part 25 of the back-side body part 21 (interval between the left and right side parts 26). The parts 52a and 52b can be fitted between the left and right side portions 26 of the back-side main body portion 21. Then, by fitting the parts 52 a and 52 b between the left and right side parts 26, the back side pad 52 can be attached on the main part 25 of the back side main body part 21, and the parts from between the left and right side parts 26 can be attached. By removing 52a, 52b, it can be exchanged for another back side pad 52.

  According to such an embodiment, the cushion side pad 51 is arranged on the cushion side main body portion 11 by fitting the cushion side pad 51 (parts 51 a and 51 b) between the side portions 16 of the cushion side main body portion 11. The Further, the back-side pad 52 is arranged on the back-side main body 21 by fitting the back-side pad 52 (parts 52 a and 52 b) between the side portions 26 of the back-side main body 21. In such fitting, the cushion side pad 51 and the back side pad 52 can be easily exchanged for the cushion side main body portion 11 and the back side main body portion 21. In this exchange, the cushioning property of the cushion side pad 51 and the back side pad 52 can be changed or the color can be changed to change the seating comfort and the design of the entire seat. Thereby, the change according to a user's needs can be performed easily.

(Second Embodiment)
FIG. 3 shows a sheet apparatus 1C according to the second embodiment of the present invention. In this sheet apparatus 1C, in addition to the structure of the sheet apparatus 1 of the first embodiment, an engagement convex part 18 and an engagement concave part 56 are provided, and other members are the same as those of the sheet apparatus 1 of the first embodiment. It is the same.

  The engaging convex portion 18 is provided in the seat cushion side main body portion 11 in the seat cushion 3, and the engaging concave portion 56 is provided in the cushion side pad 51 in the dressing pad 50. The engaging convex portion 18 is provided on the upper surface 15a of the main portion 15 of the seat cushion side main body portion 11, and is provided on the upper surface 15a of the main portion 15 so as to be positioned at the front side portion. The engaging convex part 18 can be formed by projecting the pad in the main part 15 to the front part of the upper surface 15a. The engaging convex portion 18 is formed to have an isosceles trapezoidal shape, but may have a shape other than this. In this case, it is preferable that the thickness of the engagement convex portion 18 is equal to that of the cushion side pad 51 of the dress-up pad 50, and this changes the height when the dress-up pad 50 is attached to the main portion 15. It disappears and it can be made flat.

  The engagement recess 56 is provided in the cushion side pad 51 corresponding to the engagement protrusion 18 on the main portion 15 side. In this embodiment, the cushion side pad 51 is provided on the front side portion of the second part 51b. The engaging concave portion 56 is formed in an isosceles trapezoidal shape having a size corresponding to the engaging convex portion 18, and the front surface portion thereof is in an open state.

  In the seat device 1 </ b> C having such a structure, the cushion side pad 51 is fitted into the left and right side portions 16 of the seat cushion side main body portion 11, and the cushion side pad 51 is placed on the upper surface 15 a of the main portion 15. At this time, the engaging concave portion 56 and the engaging convex portion 18 are fitted to engage with each other. By engaging the engagement convex portion 18 and the engagement concave portion 56, the cushion side pad 51 can be prevented from moving forward of the seat cushion side main body portion 11, and the cushion side pad 51 is prevented from moving to the seat cushion side main body. It will not come off from the part 11 and fall off.

(Third embodiment)
4 to 8 show a sheet apparatus 1A according to a third embodiment of the present invention. 4 is a plan view of the entire sheet apparatus 1A, FIG. 5 is a front view of the entire sheet apparatus, FIG. 6 is a longitudinal sectional view taken along the line II of FIG. 5, and FIGS. 7 (a) to 7 (d) are FIGS. FIG. 8 is a cross-sectional view taken along line EE, FF, GG, and HH in FIG. 8, and FIG. 8 is an enlarged cross-sectional view of a portion L in FIG.

  As shown in FIGS. 4 to 6, the cushion-side main body 11 is formed by a main portion 15 having a flat upper surface 15a and left and right side portions 16 provided on both sides of the main portion 15, and a front surface 25a. The back-side main body portion 21 is formed by a main portion 25 having a flat (upper surface) and left and right side portions 26 provided high on both sides of the main portion 25. The cushion main body 11 and the back main body 21 form the seat main body 2.

  A cushion side pad 51 made up of a first part 51a and a second part 51b is laminated on the main part 15 of the cushion side main body part 11 (see FIGS. 4, 6, 7A and 7B), and the back side. A back-side pad 52 made up of a first part 52a and a second part 52b is stacked on the main part 25 of the side body part 21 (see FIGS. 5, 6, 7C and 7D). A dress-up pad 50 is formed by the cushion side pad 51 and the back side pad 52. The cushion side pad 51 (51a, 51b) is replaceable with respect to the cushion side main body portion 11 by being fitted between the left and right side portions 16. Similarly, the back side pad 52 (52a, 52b) can be exchanged for the back side main body portion 21 by being fitted between the left and right side portions 26. In order to perform this fitting, the lateral widths of the cushion side pad 51 (51a, 51b) and the back side pad 52 (52a, 52b) are the distance between the side parts 16 of the cushion side main body part 11 and the side part of the back side main body part 21, respectively. This is substantially the same as the interval of 26.

  In this embodiment, as shown in FIGS. 7A and 7B, the inner surface of the left and right side portions 16 in the cushion side main body portion 11 is recessed along the thickness direction (left and right direction) of the pad. A recess 17 is formed. The recess 17 is formed to be continuous in the front-rear direction with respect to the inner side surfaces of the left and right side portions 16. Further, as shown in FIGS. 7 (c) and 7 (d), recesses 27 that are recessed in the thickness direction (front-rear direction) of the pad are also formed on the inner side surfaces of the left and right side portions 26 in the back side main body portion 21. ing. The recess 27 is formed to be continuous in the vertical direction with respect to the inner surfaces of the left and right side portions 26. As shown in FIGS. 7 and 8, the recesses 17 and 27 are valley-shaped with a V-shaped cross section.

  On the other hand, on the left and right outer surfaces of the cushion side pad 51 (51a, 51b), as shown in FIGS. 7A and 7B, convex portions 61 projecting in the pad width direction are formed. The convex portion 61 is formed so as to be continuous over the first part 51 a and the second part 51 b in the cushion side pad 51. Further, as shown in FIGS. 7C and 7D, convex portions 62 projecting in the pad width direction are formed on the left and right outer surfaces of the back side pad 52 (52a, 52b). The convex part 62 is formed so as to be continuous over the first part 52a and the second part 52b in the back side pad 52. As shown in FIG. 7 and FIG. 8, these convex portions 61 and 62 are mountain-shaped with a V-shaped cross section, and are mutually opposite to the concave portions 17 and 27 of the cushion side main body portion 11 and the back side main body portion 21. It can be fitted.

  In such a structure, the cushion side pad 51 is cushioned by fitting the cushion side pad 51 (51a, 51b) between the side parts 16 of the cushion side main body part 11 so that the convex part 61 fits into the concave part 17. Attached to the side main body 11. Further, by inserting the back side pad 52 (parts 52a, 52b) between the side parts 26 of the back side main body part 21 so that the convex part 62 fits into the concave part 27, the back side pad 52 becomes the back side main body. It is attached to the part 21. In the structure in which the concave portions 17 and 27 and the convex portions 61 and 62 are fitted, the cushion side pad 51 (51a, 51b) and the back side pad 52 (52a, 52b) are stably provided in the main body portions 11, 21 can be attached. Further, because of the fitting structure by fitting, the cushion side pad 51 and the back side pad 52 can be easily replaced with respect to the cushion side main body portion 11 and the back side main body portion 21. At the time of replacement, the comfort of the cushion and the design of the entire seat can be changed by changing the cushioning properties of the cushion side pad 51 and the back side pad 52 or changing the color. Thereby, the change according to a user's needs can be performed easily.

  In this embodiment, the concave portions 17 and 27 are formed on the outer side surfaces of the cushion side pad 51 and the back side pad 52, and the convex portions 61 and 62 are formed on the inner side surfaces of the cushion side main body portion 11 and the back side main body portion 21. You may do it. Further, the concave portions 17 and 27 and the convex portions 61 and 62 may have a shape other than the V shape, or may be a concave and convex portion that is continuous in a wavy shape.

(Fourth embodiment)
9 and 10 show a sheet apparatus 1B according to a fourth embodiment of the present invention. The sheet apparatus 1B of this embodiment is a modification of the sheet apparatus 1A shown in FIGS. 4 to 8, and FIG. 9A is a cross-sectional view corresponding to the line EE in FIG. b) is a cross-sectional view corresponding to the line GG in FIG. 5, and FIG. 10 is an enlarged cross-sectional view of a portion M in FIG. 9B.

  In the seat device 1B, similarly to the seat device 1A, the concave portions 17 having a V-shaped cross section are formed on the inner side surfaces of the left and right side portions 16 of the cushion side main body portion 11, and the left and right side portions of the back side main body portion 21 are formed. A concave portion 27 having a V-shaped cross section is formed on the inner surface of 26. Further, a V-shaped convex portion 61 that can be fitted into the concave portion 17 is formed on the outer side surface of the cushion side pad 51 (51a, 51b), and the concave portion 27 is formed on the outer side surface of the back side pad 52 (52a, 52b). A V-shaped convex portion 62 that can be fitted is formed. In addition to this, in this embodiment, the inner side surfaces of the left and right side portions 16 of the cushion side main body portion 11 and the outer surfaces of the cushion side pads 51 (51a, 51b) corresponding thereto can be engaged with each other. While the member 63 is attached, the engaging member 63 that can be engaged with the inner side surfaces of the left and right side portions 26 of the back side main body portion 21 and the outer side surfaces of the back side pads 52 (52a, 52b) corresponding thereto. It is attached.

  FIG. 10 shows the engaging member 63 in the back-side main body 21, and the cushion-side main body 11 is the same. As shown in FIG. 10, a male side surface fastener 64 is attached to a part of the inner side surface of the left and right side portions 26, and a part of the outer side surface of the second part 52b of the back side pad 52 corresponding thereto is attached to the male side surface fastener 64. A female side fastener 65 that can be engaged with the male side fastener 64 is attached, and an engaging member 63 is formed by these surface fasteners.

  As described above, the engagement member 63 including the hook-and-loop fasteners 64 and 65 with respect to the inner side surfaces of the back side main body portion 21 and the cushion side main body portion 11 and the outer side surfaces of the back side pad 52 and the cushion side pad 51 corresponding thereto. In the structure in which is attached, the back side pad 52 and the cushion side pad 51 can be attached to the back side main body portion 21 and the cushion side main body portion 11 by engaging the hook-and-loop fasteners 64 and 65, respectively. Thereby, since the engaging force of the engaging member 63 is given in addition to the fitting force of the concavo-convex portions 17, 27 and 61, 62, the back side pad 52 and the cushion side pad 51 can be firmly attached, and at the time of sitting There is a merit to improve the stability.

  In the engaging member 63, the female side fastener 65 is provided at the central portion in the thickness direction on the outer side surface of the second part 52 b, and the male side fastener 64 is provided at the corresponding portion in the side portion 26. By providing the hook-and-loop fasteners 64 and 65 in the center portion in the thickness direction of the dress-up pad 50 as described above, the hook-and-loop fasteners 64 and 65 can be engaged even when the dress-up pad 50 is used upside down. Is possible.

  The engaging member 63 may be another member such as a slide fastener or a button. Further, the inner surface of the back side body portion 21 and the cushion side body portion 11 is made flat without forming the recesses 17 and 27, and similarly, the convex portion 61 on the outer surface of the back side pad 52 and the cushion side pad 51, It is possible to form a flat surface without forming 62.

(Fifth embodiment)
FIG. 11 shows the structure of the dress-up pad 50 applied to each embodiment of the present invention. The dress-up pad 50 is formed by a pad main body 53 made of a cushion pad such as a foamed resin molded body, and a skin 54 covering the pad main body 53. The skin 54 is formed of a cloth material, a resin yarn knitted cloth, or the like. The skin 54 can be exchanged for the pad main body 53. As a result, only the epidermis can be washed or replaced with an epidermis having a different color or a different feel, and changes according to the needs of the user can be easily performed.

(Sixth embodiment)
FIG. 12 shows another embodiment of the dress-up pad 50. The dressing pad 50 of this embodiment is formed by a pad main body 53, a skin 54a that covers one surface of the pad main body 53, and a skin 54b that covers the other surface. The epidermis 54 a and the epidermis 54 b cover the entire pad main body 53 by stitching the peripheral portions together at the edge of the pad main body 53. In this embodiment, the skins 54a and 54b are made of different colors or are made of different materials. Therefore, the state in which the skin 54a is exposed and used with respect to the seat body 2 and the state in which the skin 54b is exposed and used can have different designs or different feels. Therefore, the change according to the user's needs is possible only by reversing the dress-up pad 50.

(Seventh embodiment)
FIG. 13 shows yet another embodiment of the dress-up pad 50. The dress-up pad 50 according to this embodiment is obtained by integrating the first part 51a in the cushion-side pad 51 of the dress-up pad 50 and the first part 52a in the back-side pad 52, whereby the seat portion 55a and the backrest. A connection pad 55 in which the portions 55b are integrally connected is formed. The connection pad 55 corresponds to the buttocks and back portions of the seated person. The seat portion 55 a of the connection pad 55 is fitted into the left and right side portions 16 of the cushion side main body portion 11 shown in FIG. 1, and the backrest portion 55 b is fitted into the left and right side portions 26 of the back side main body portion 21. By this fitting, the connecting pad 55 is fitted and attached to the cushion side main body portion 11 and the back side main body portion 21. Further, in addition to the connection pad 55, the second part 51b of the cushion side pad 51 and the second pad 52b of the back side pad 52 are fitted and attached to the cushion side main body portion 11 and the back side main body portion 21. The second part 51b of the cushion side pad 51 and the second part 52b of the back side pad 52 support the thigh portion and the shoulder portion of the seated person as in FIG.

  In such an embodiment, since the connecting pad 55 connecting the seat portion 55a and the backrest portion 55b is provided, the waist portion of the seated person can be reliably supported, and the fatigue given to the seated person can be reduced. Can do.

(Eighth embodiment)
FIG. 14 shows still another embodiment of the dress-up pad 50. The dress-up pad 50 of this embodiment is provided with a temperature adjustment member 57 on the seating side of the seated person in addition to the pad body 53 covering the pad body 53. The temperature adjustment member 57 is attached to the pad main body 53 by forming a mounting recess 53a on the seating side of the pad main body 53 and fitting into the mounting recess 53a. The skin 54 is in a state of covering the temperature control member 57. As the temperature control member 57, a cold insulating material, a thermal insulating material, or the like can be selected. In order to replace the temperature adjustment member 57, a zipper 58 that can be opened and closed is attached to the outer skin 54 in the transverse direction.

  In such embodiment, it can be set as the dress-up pad 50 provided with the temperature control members 57, such as a cold insulating material and a heat insulating material. For this reason, a temperature control effect can be made to act on a seated person and it can respond to a user's needs favorably.

  The present invention is not limited to the above embodiment, and various modifications can be made. For example, the present invention can be similarly applied not only to a seat device for automobiles but also to a seat device for furniture.

1A, 1B Seat device 2 Seat body portion 3 Seat cushion 4 Seat back 6 Headrest 11 Cushion side body portion 12 Slide rails 15, 25 Main portion 16, 26 Side portions 17, 27 Recess portion 18 Engaging projection portion 21 Back side body portion 22 Lifter lever 50 Dressing pad 51 Cushion side pad 52 Back side pad 53 Pad body 54, 54a, 54b Skin 55 Connecting pad 56 Engaging recess 57 Temperature control member 58 Fastener 61, 62 Protruding part 63 Engaging member

Claims (8)

A seat device in which a dress-up pad is replaceable with respect to a seat body,
The seat main body part is composed of a main part that serves as a seating area for a seated person and left and right side parts provided high on both sides of the main part, and the dressing pad is fitted between the left and right side parts, thereby the seat. A seat device that is replaceably attached to a main body.   2. The sheet apparatus according to claim 1, wherein the inner side surfaces of the left and right side portions and the left and right outer surfaces of the dressing pads are in a concavo-convex shape that fits into each other.   The seat device according to claim 1, wherein engaging members are attached to the inner side surfaces of the left and right side portions and the left and right outer surfaces of the dressing pads.   An engagement convex portion is formed on the main portion, an engagement concave portion is formed on the dressing pad, and the engagement convex portion and the engagement concave portion are fitted to each other so that the dressing pad is replaceably mounted on the main portion. The sheet apparatus according to any one of claims 1 to 3, wherein   The sheet apparatus according to any one of claims 1 to 4, wherein the dressing pad is replaceable with respect to the sheet main body in a state where the front and back sides are reversed.   5. The dressing pad according to claim 1, wherein a seat portion and a backrest portion are connected to each other, and the seat portion and the backrest portion are integrated with each other so that the seat body portion can be replaced. The sheet apparatus according to any one of claims.   The seat device according to claim 1, wherein a temperature adjustment member can be attached to the seating side of the dressing pad. The seat device according to any one of claims 1 to 7, wherein the dressing pad is formed by a pad main body made of a cushion pad and a skin covering the pad main body.

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