JP7372645B2 - sheet - Google Patents

Description

The present invention relates to a sheet with a pad and a skin.

In automobile seats and other seats, the seat cushion, which supports the buttocks of the occupant, and the seat back, which supports the occupant's back, have a seat structure in which a pad made of foamed resin is covered with a skin made of leather, vinyl leather, etc. has been adopted.

For example, in the sheet shown in Patent Document 1, the skin has a hanging part at the seam of a plurality of sheet-like materials, and this hanging part is inserted into a groove of a pad, and an insert wire provided inside the groove is inserted into the groove of the pad. Fixed. The hanging part is fixed to the insert wire by using an installation tool called a hog ringer and hooking the hanging part to the insert wire with a C ring, which is a C-shaped wire rod. let

JP 2018-52498 Publication

However, in the seat structure shown in Patent Document 1, it is necessary to fix the hanging portion of the skin inside the groove of the pad using an installation tool such as a hog ringer. Installation tools such as hog ringers are heavy, which places a heavy burden on workers who install the skin.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a sheet that can reduce the burden of skin assembly work.

In order to solve the above problems, the seat of the present invention has a first surface facing the seated person and a second surface different from the first surface, and includes a pad made of an elastic material ; The pad includes a sheet-like or bag-like outer skin that covers the first surface of the pad, and a fixing member that fixes an edge portion of the outer skin to the second surface, and the edge portion is fixed to the second surface. A recess is formed at a position to be fixed, the fixing member is manufactured by extrusion molding or injection molding using a synthetic resin, and the fixing member is capable of fitting into the recess with a connecting portion connected to the edge portion. The edge portion is sewn to the connection portion, the connection portion is formed to a thickness that makes it easy to sew the edge portion, and the connection portion has a protrusion of the projection portion. A contact surface is formed that spreads in a direction different from the direction and contacts the second surface in a state where the convex part is fitted into the concave part, and the width of the convex part is larger than the concave part in an unloaded state. It is characterized by having elasticity that allows the width of the convex portion to change such that it is larger than the width of the convex portion and becomes smaller than the width of the concave portion in a pressurized state.

In such a configuration, the seat includes a fixing member that fixes the edge portion of the skin to a second surface of the pad that faces the seated person and is different from the first surface. A recess is formed in the second surface at a position where the edge portion is fixed. The fixing member has a connecting portion connected to the edge portion and a convex portion inserted into the recess. In this configuration, the fixing member is restrained to the second surface by fitting the convex portion of the fixing member into the recess on the second surface of the pad while the connecting portion of the fixing member is connected to the edge portion of the skin. is possible. Therefore, it is possible to assemble the skin onto the pad without using a heavy tool such as a hog ringer, and the burden on the worker is reduced.
Moreover, in the above-mentioned sheet, the fixing member further includes a contact surface that extends in a direction different from the protruding direction of the convex part and abuts on the second surface while the convex part is fitted into the concave part. With this configuration, even when the protrusion is fitted into the recess and the fixing member is fixed to the second surface of the pad, the contact of the fixing member from the second surface to the first surface is applied to the epidermis. Due to the frictional resistance generated at the contact surface between the contact surface and the second surface of the pad, the force acting on the convex portion is reduced, and as a result, the convex portion becomes difficult to come off from the concave portion.
Moreover, in the above-mentioned sheet, the contact surface is formed in the connecting portion, so that when the connecting portion receives a tensile force from the skin, part of the force is applied in the direction of pressing the contact surface against the second surface. act. Therefore, the frictional resistance generated at the contact surface between the contact surface and the second surface further increases, thereby further reducing the force acting on the protrusion, and making it even more difficult for the protrusion to come off.
Further, in the above sheet, the convex portion has a width that is larger than the width of the concave portion in an unloaded state and smaller than the width of the concave portion in a pressurized state. It has elasticity that allows for changes in width. In this configuration, when the protrusion of the fixing member is fitted into the recess of the skin, the elasticity of the protrusion causes the outer surface of the protrusion to press against the inner surface of the recess. This increases the frictional resistance at the contact surface between the convex portion and the concave portion, making it difficult for the convex portion to come off from the concave portion.

In the above sheet, the recess is a groove that extends in the vicinity of the edge of the second surface in a direction parallel to the direction in which the edge of the second surface extends, and the protrusion fits into at least a portion of the groove. It is preferable that the protrusions match.

With this configuration, by inserting the convex portion, which is a protrusion, into the concave portion, which is a groove extending parallel to the edge of the second surface, it is possible to easily fix the edge portion of the epidermis along the edge of the second surface. It is. Therefore, the workability of assembling the skin is further improved, and it is possible to reduce the occurrence of wrinkles in the skin.

In the above sheet, it is preferable that the fixing member further includes a pressure-receiving surface that extends in a direction different from the protrusion direction of the convex portion and receives a pressing force that allows the fixing member to fit into the recess.

With this configuration, in the work of fitting the protrusion into the recess, the operator can easily and reliably apply a pressing force to the fixing member by pressing the pressure-receiving surface of the fixing member, which facilitates the assembly of the skin. Work efficiency is further improved and the burden on the worker is further reduced.

In the above sheet, it is preferable that the contact surface is provided with a protrusion or a rib.

In such a configuration, the frictional resistance generated at the contact surface between the abutting surface and the second surface further increases, thereby further reducing the force acting on the protrusion, and making it even more difficult for the protrusion to come off.

In the above-mentioned sheet, it is preferable that the convex portion has an engaging protrusion on the outer surface of the convex portion that can engage with the inner circumferential surface of the concave portion.

With this configuration, even when a force is applied to the skin from the second surface to the first surface, the engagement protrusion of the convex part engages with the inner peripheral surface of the concave part, thereby reducing friction at the contact surface between the convex part and the concave part. Since the resistance increases, the convex portion becomes more difficult to dislodge from the concave portion.

In the sheet described above, it is preferable that the edge portion is sewn to the connecting portion and folded back so as to cover the sewn portion.

In such a configuration, the edge portion of the skin is sewn to the connecting portion of the fixing member, and the sewn portion is covered by the folded edge portion. Therefore, the sewn portion is not exposed to the outside, reducing the risk of deterioration or damage.

In the sheet described above, in a configuration in which the second surface has a plurality of corners and the skin has a plurality of edges corresponding to the plurality of corners, the wire connecting the edges is It is preferable to further provide.

In this configuration, the outer skin is fixed to the edge of the second surface of the pad by the fixing member, and the edges of the outer skin corresponding to the corners of the pad are connected by wires, thereby suppressing the occurrence of wrinkles in the outer skin. Is possible.

According to the sheet of the present invention, the burden of skin assembly work can be reduced.

FIG. 1 is an exploded perspective view showing the overall configuration of a seat cushion according to an embodiment of the seat of the present invention. FIG. 2 is a bottom view of the pad of FIG. 1; FIG. 2 is a perspective view of the fixing member of FIG. 1; FIG. 4 is a front view of the fixing member of FIG. 3; FIG. 2 is an explanatory cross-sectional view showing a state immediately before the protrusions of the fixing member are inserted into the grooves of the pad when the skin of FIG. 1 is assembled to the pad. FIG. 6 is an explanatory cross-sectional view showing a state in which the protrusions of the fixing member shown in FIG. 5 are inserted into the grooves of the pad. FIG. 7 is an explanatory cross-sectional view showing an example of a fixing member having no pressure receiving surface, which is a modified example of the seat of the present invention. FIG. 7 is an explanatory cross-sectional view showing an example of a fixing member having engagement protrusions on the outer surface of the protrusion, which is another modified example of the sheet of the present invention. (a) is a perspective view of a fixing member which is still another modification of the seat of the present invention, and (b) is a cross-sectional view of the fixing member of (a). (a) is a perspective view of a fixing member which is still another modification of the seat of the present invention, and (b) is a cross-sectional view of the fixing member of (a). (a) is a perspective view of a fixing member which is still another modification of the seat of the present invention, and (b) is a cross-sectional view of the fixing member of (a). (a) is a perspective view of a fixing member which is still another modification of the seat of the present invention, and (b) is a cross-sectional view of the fixing member of (a). FIG. 7 is a perspective explanatory view showing a configuration in which a plurality of fixing members are fitted into elongated grooves, which is still another modification of the sheet of the present invention.

Hereinafter, one preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 shows the structure of a seat cushion 1 that supports the buttocks of a seated person in an automobile seat, as an example of an embodiment of the seat of the present invention.

As shown in FIG. 1, the seat cushion 1 includes a pad 2, an outer skin 3, and a plurality of fixing members 4 that fix an edge portion 3a of the outer skin 3 to a lower surface 2b (back surface) of the pad 2. The outer skin 3 is assembled so as to cover the upper surface 2a of the pad 2 by fixing the edge portion 3a of the outer skin 3 to the lower surface 2b of the pad 2 over the entire circumference using a plurality of fixing members 4.

As shown in FIGS. 1 and 2, the pad 2 has an upper surface 2a, which is a first surface facing the seated person (particularly near the buttocks), and a lower surface 2b, which is a second surface different from the first surface.

The pad 2 is made of a material that is elastic and has a certain degree of shape retention. The pad 2 is manufactured by integrally foam-molding a low-density, shape-retentive bead foam product and an elastic polyurethane resin, and in this case, the pad 2 becomes lightweight.

A plurality of grooves 5, which are recesses, are formed on the lower surface 2b at positions where the edge portions 3a of the skin 3 are fixed.

The groove 5 extends in the vicinity of the edge 2c of the lower surface 2b in a direction parallel to the direction A in which the edge 2c of the lower surface 2b extends. Although the length of the groove 5 is not particularly limited in this embodiment, it is preferable that it be shorter in the curved portion of the edge 2c of the pad 2. This is because, if a large number of short grooves 5 are arranged intermittently in the curved portion of the edge 2c of the pad 2, the skin 3 can be stretched to fit the curve of the curved portion without wrinkles. It is from.

The groove 5 has a substantially rectangular shape when viewed from the insertion direction (the direction in which the lower surface 2b is viewed from below).

As shown in FIG. 1, the skin 3 is a sheet-like or bag-like member that covers the upper surface 2a and side peripheral surfaces (that is, both sides and both front and rear surfaces) of the pad 2, and is made of a plurality of layers made of leather, vinyl leather, etc. It is constructed by joining the ends of sheet-like materials together.

The fixing member 4 is configured to fix the edge portion 3a of the outer skin 3 to the lower surface 2b of the pad 2.

As shown in FIGS. 3 to 5, the fixing member 4 includes a connecting portion 7 connected to the edge portion 3a of the outer skin 3, a protrusion 6 that is a convex portion that can fit into the groove 5 of the pad 2, and a pressure receiving portion. 8.

The protrusion 6 fits into at least a portion of the groove 5. In the present embodiment shown in FIG. 1, the protrusion 6 is fitted over the entire length of the groove 5.

The protrusion 6 (convex portion) has an elongated elliptical ring-shaped cross section when viewed in a cross section (i.e., a cross section) in a direction perpendicular to the longitudinal direction of the protrusion 6.

In this embodiment, the protrusion 6 has elasticity that allows the width D1 of the protrusion 6 to change so that it can be contracted when inserted into the groove 5 of the pad 2. Specifically, the width D1 of the protrusion 6 is larger than the width (groove width) D2 of the groove 5 in the no-load state, and smaller than the width D2 of the groove 5 in the pressurized state. It has elasticity that allows the width D1 of the protrusion 6 to change as described above.

The pressure receiving part 8 has a pressure receiving surface 8a. The pressure receiving surface 8a extends in a direction C different from the protruding direction B of the protrusion 6 (in the present embodiment, a direction C perpendicular to the protruding direction B (see FIG. 4)), and allows the fixing member 4 to fit into the groove 5. It is possible to receive a pressing force that is possible.

The pressure-receiving portion 8 and the pressure-receiving surface 8a may have an area and shape that can be easily pressed by an operator with a finger or the like, for example, a semicircular or rectangular shape when viewed from the protrusion direction B.

The fixing member 4 has a contact surface 9 that extends in a direction C different from the protruding direction B of the protrusion 6 and that comes into contact with the lower surface 2b of the pad 2 when the protrusion 6 is fitted into the groove 5. The contact surface 9 may be provided with protrusions or ribs to increase the frictional resistance between the contact surface 9 and the lower surface 2b.

In this embodiment, as shown in FIGS. 3 and 4, the contact surface 9 is formed at a connecting portion 7 that connects to the edge portion 3a of the outer skin 3.

The fixing member 4 of this embodiment is made of synthetic resin such as polypropylene, for example. Such a fixing member 4 made of synthetic resin may be manufactured by extrusion molding in consideration of cost. Furthermore, the fixing member 4 may be manufactured by injection molding. It is preferable that the portion of the fixing member 4 to be sewn onto the outer skin 3 be formed thin in order to facilitate sewing. There is no particular color for the fixing member 4, and the color of the material may be used as is.

The edge portion 3a of the outer skin 3 is sewn to the connecting portion 7 and is folded back so as to cover the sewn portion 11.

In the seat cushion 1 configured as described above, when the outer skin 3 is assembled to the pad 2, the following procedure is performed.

First, as shown in FIG. 5, a plurality of fixing members 4 are attached to the entire circumference of the edge portion 3a of the skin 3. Specifically, the surface 7a of the connecting portion 7 of the fixing member 4 on the side opposite to the protrusion 6 is brought into contact with the outer surface side 3a1 (see FIG. 5) of the edge portion 3a, and the edge portion 3a and the connecting portion 7 are sewn together. do. Then, the edge portion 3a is folded back so as to cover the sewn portion 11.

Then, as shown in FIG. 1, the outer skin 3 covers the upper surface 2a and side peripheral surface of the pad 2.

Next, the edge portion 3a of the skin 3 and the fixing member 4 are pulled to the bottom surface 2b of the pad 2, and then, as shown in FIGS. Insert each. This completes the work of assembling the skin 3.

(Features of this embodiment)
(1)
The seat cushion 1 of this embodiment includes a fixing member 4 that fixes the edge portion 3a of the outer skin 3 to the lower surface 2b of the pad 2, which faces the seated person and is different from the upper surface 2a. A groove 5 is formed in the lower surface 2b at a position where the edge portion 3a is fixed. The fixing member 4 has a connecting portion 7 connected to the edge portion 3a and a protrusion 6 inserted into the groove 5. In this configuration, with the fixing member 4 connected to the edge portion 3a of the skin 3, the protrusion 6 of the fixing member 4 is fitted into the groove 5 of the lower surface 2b of the pad 2, so that the fixing member 4 is connected to the lower surface of the pad 2. 2b. Therefore, it is possible to assemble the skin 3 onto the pad 2 without using a heavy tool such as a hog ringer, and the burden on the worker is reduced.

(2)
In the seat cushion 1 of this embodiment, a groove 5 extending in a direction parallel to the direction A in which the edge 2c of the lower surface 2b extends is formed as a recess in the lower surface 2b of the pad 2 near the edge 2c of the lower surface 2b. Further, as a convex portion of the fixing member 4, a protrusion 6 is provided which fits into at least a portion of the groove 5, which is a concave portion. In this configuration, the edge portion 3a of the skin 3 can be easily fixed along the edge 2c of the lower surface 2b by inserting the protrusion 6, which is a convex portion, into the groove 5 extending parallel to the edge 2c of the lower surface 2b. It is possible. Therefore, the workability of assembling the skin 3 is further improved, and since it is not fixed at one point but with a long protrusion, unnecessary tension is not generated, and the occurrence of wrinkles on the skin 3 is reduced. It is possible to do so.

(3)
In the seat cushion 1 of this embodiment, the width D1 of the protrusion 6 is larger than the width D2 of the groove 5 in the no-load state, and smaller than the width D2 of the groove 5 in the pressurized state. It has elasticity that allows the width D1 of the protrusion 6 to change as described above. In this configuration, when the protrusion 6 of the fixing member 4 is fitted into the groove 5 of the skin 3, the outer surface of the protrusion 6 presses against the inner surface of the groove 5 due to the elasticity of the protrusion 6. This increases the frictional resistance at the contact surface between the protrusion 6 and the groove 5, making it difficult for the protrusion 6 to come off the groove 5.

(4)
In the seat cushion 1 of this embodiment, the fixing member 4 extends in a direction C different from the protruding direction B of the protrusion 6, and the pressure receiving surface 8a receives a pressing force that allows the fixing member 4 to fit into the groove 5. has. With this configuration, in the work of fitting the protrusion 6 into the groove 5, the operator can easily and reliably apply a pressing force to the fixing member 4 by pressing the pressure receiving surface 8a of the fixing member 4. , the workability of assembling the skin 3 is further improved, and the burden on the worker is further reduced.

(5)
In the seat cushion 1 of this embodiment, the fixing member 4 extends in a direction C different from the protruding direction B of the protrusion 6, and has a contact surface 9 that abuts the lower surface 2b with the protrusion 6 fitted into the groove 5. have With this configuration, in a state where the protrusion 6 is fitted into the groove 5 and the fixing member 4 is fixed to the lower surface 2b of the pad 2, even when a force is applied to the outer skin 3 from the lower surface 2b to the upper surface 2a, the fixing member The force acting on the protrusion 6 is reduced by the frictional resistance generated at the contact surface between the contact surface 9 of the pad 2 and the lower surface 2b of the pad 2, and as a result, the protrusion 6 becomes difficult to come off from the groove 5.

(6)
Preferably, the abutting surface 9 is provided with protrusions or ribs. In this case, the frictional resistance generated at the contact surface between the contact surface 9 and the lower surface 2b further increases, so that the force acting on the protrusion 6 is further reduced, and the protrusion 6 becomes even more difficult to come off.

(7)
In the seat cushion 1 of the present embodiment, the contact surface 9 of the fixing member 4 is formed on the connecting portion 7, so that when the connecting portion 7 receives a tensile force from the skin 3, part of the force comes into contact with the connecting portion 7. It acts in the direction of pressing the surface 9 against the lower surface 2b. Therefore, the frictional resistance generated at the contact surface between the contact surface 9 and the lower surface 2b further increases, so that the force acting on the protrusion 6 is further reduced, and the protrusion 6 becomes more difficult to come off.

(8)
In the seat cushion 1 of this embodiment, the edge portion 3a of the outer skin 3 is sewn to the connecting portion 7 of the fixing member 4, and the sewn portion 11 is covered by the folded edge portion 3a. Therefore, the sewn portion 11 is not exposed to the outside, reducing the risk of deterioration or damage.

(Modified example)
(A)
In the present invention, the pressure receiving part 8 having the pressure receiving surface 8a shown in FIG. 4 is not essential, and as in the modification shown in FIG. Good too. In this case, the fixing member 4 becomes smaller and is hidden behind the skin 3, making it difficult to see from the outside.

(B)
In addition, as in another modification of the present invention shown in FIG. It may be made to have.

In the modification shown in FIG. 8, even when a force is applied to the skin 3 from the lower surface 2b to the upper surface 2a, the engaging protrusion 10 of the protrusion 6 engages with the inner circumferential surface of the groove 5, so that the so-called By functioning as a barb, the frictional resistance at the contact surface between the protrusion 6 and the groove 5 increases. As a result, the protrusions 6 become more difficult to come off from the grooves 5.

(C)
In the above embodiment, the shape of the protrusion 6 (convex portion) of the fixing member 4 has an elongated elliptical ring-shaped cross section, but the present invention is not limited to this, and can have various cross-sectional shapes. It is possible to employ the protrusion 6.

As another modification of the present invention, for example, a fixing member 4 having a protrusion 6 having a cross-sectional shape shown in FIGS. 9 to 12 may be used.

For example, in the fixed member 4 shown in FIGS. 9 and 10, a protrusion 6 and a connecting portion 7 are integrally formed, and the protrusion 6 is branched into a flat plate portion 6a and a curved tongue-shaped movable piece 6b. It has a shape. The protrusion 6 having such a shape has the advantage that it is easy to mold because there is no closed space, and it is easy to insert into the groove 5 of the pad 2.

In addition, the protrusion 6 shown in FIG. 11 has a flat plate portion 6a and a movable piece 6b having a C-shaped cross section integrally formed, and a protrusion portion 12 in which the movable piece 6b protrudes in a direction opposite to the insertion direction into the groove 5. has. Since the protrusion 6 having such a shape has the protrusion 12 that protrudes in the direction opposite to the direction of insertion into the groove 5, it has the advantage of being difficult to come off from the groove 5.

Furthermore, the protrusion 6 shown in FIG. 12 has a shape including a flat plate portion 6a and two curved tongue-shaped movable pieces 6b and 6c. The two movable pieces 6b and 6c overlap each other while facing each other. The protrusion 6 having such a shape has a protrusion 13 that protrudes in a direction opposite to the insertion direction into the groove 5 at the tip of the movable piece 6b, so it has the advantage that it is difficult to come off from the groove 5.

(D)
In the above embodiment, as shown in FIG. 2, the fixing members 4 are individually fitted into the plurality of substantially rectangular grooves 5, but the present invention is not limited to this. As a modification of the present invention, as shown in FIG. 13, a plurality of fixing members 4 may be fitted into a long groove 5. In the modification shown in FIG. 13, protrusions 14 may be provided that protrude from the inner surface of the elongated groove 5 in the width direction E of the groove 5 and are arranged to face each other.

The protrusion 14 is provided at a position corresponding to the attachment position of the fixing member 4. By providing the protrusion 14 inside the elongated groove 5, it is easier to insert the fixing member 4 into the groove 5 than when the groove 5 is formed along the line L connecting the vertices of the protrusion 14. , the stress that the fixing member 4 receives from the groove 5 is alleviated. Therefore, the operator can easily insert the fixing member 4 into the groove 5 of the pad 2.

Therefore, regarding the grooves 5, a plurality of small grooves 5 may be disposed intermittently depending on the position of the fixing member 4 as shown in FIG. 2, or as a modification of the present invention as shown in FIG. A long groove 5 may also be provided. When forming these grooves 5 shown in FIGS. 2 and 13 in the pad 2, it is necessary to provide a protrusion in a mold for foaming the foamed member of the pad 2. When providing a plurality of small grooves 5 intermittently depending on the position of the fixing member 4, small protrusions are provided intermittently on the mold, while when providing a long groove 5, long protrusions ( ribs) must be provided on the mold. In such a case, the longer protrusions have higher strength than the smaller protrusions, so the possibility of breakage of the mold protrusions is reduced. Therefore, considering the possibility of breakage of the protrusion of the mold, it is better to arrange the grooves 5 of the pad 2 with long grooves 5 as shown in FIG. 13 than with intermittent small grooves. This is advantageous in that the risk of damage to the mold for molding can be reduced.

(E)
Although the above embodiment shows an example in which the fixing member 4 fixes the edge portion 3a of the outer skin 3 to the lower surface 2b (back surface) of the pad 2, the present invention is not limited to this, and In the member 4, the edge portion 3a of the skin 3 may be fixed to a second surface that is different from the first surface (upper surface 2a in the above embodiment) facing the seated person. Therefore, if the edge portion 3a is fixed to both sides or rear surface of the pad 2 other than the top surface 2a with the fixing member 4, the edge portion 3a and the fixing member 4 will be invisible to the seated person sitting on the top surface 2a, and the seat cushion 1 will be Does not spoil the beauty. However, when the second surface is the lower surface 2b, it is most preferable because the edge portion 3a and the fixing member 4 are most difficult to see from the seated person sitting on the upper surface 2a of the pad 2.

(F)
In the embodiment described above, the groove 5 is formed as a recess on the lower surface 2b (second surface) of the pad 2, and the fixing member 4 has the protrusion 6 as a convex portion that can fit into the groove 5. The invention is not limited to this, but a plurality of round holes, square holes, etc. are formed as recesses in the lower surface 2b (second surface) of the pad 2, and the fixing member 4 can be fitted into the round holes or square holes. It may also have a cylindrical or prismatic protrusion.

(G)
In the above embodiment, an example is shown in which the edge portion 3a of the skin 3 is fixed to the lower surface 2b (back surface) of the pad 2 only by the fixing member 4, but as a modification of the present invention, not only the fixing member 4 but also the fixing member 4 is used. Furthermore, a flexible wire such as a string or band is passed through the edges of the outer skin 3 at the locations corresponding to the corners (four locations) of the lower surface 2b of the pad 2, and the outer skin 3 is tied up like a purse string with the string. The edges of the skin 3 may be connected together. This makes it possible to suppress wrinkles in the epidermis 3.

That is, in the sheet according to this modification, in a configuration in which the lower surface 2b of the pad 2 has a plurality of corners and the outer skin 3 has a plurality of edges corresponding to the plurality of corners, the edges are connected to each other. It further includes a wire rod. As a result, the outer skin 3 is fixed to the edge of the lower surface 2b of the pad 2 by the fixing member 4, and the edges of the outer skin 3 corresponding to the corners of the pad 2 are connected by wires, thereby preventing wrinkles in the outer skin 3. It is possible to suppress the occurrence.

Further, as a further modification using a string, the entire left side area and the entire right side area including the two edges corresponding to the corners of the epidermis 3 may be tied with a string. That is, it is also possible to use the fixing member 4 of this embodiment only on the front and rear parts of the epidermis 3, and to tie the left and right parts of the epidermis 3 with strings. With this configuration, rather than tying each of the four corners of the skin 3 with a string, two corners can be tied together with a string, so the work of assembling the skin 3 can be simplified. It becomes possible to improve.

(H)
In the above embodiment, the seat cushion of an automobile seat is used as an example of the seat of the present invention, but the present invention is not limited to this, and the present invention is not limited to this. If so, the sheet of the present invention can be widely applied. As a modification of the present invention, a seat back for supporting the back of a seated person in an automobile seat may be used. In addition to automobile seats, seats in the present invention include seats installed in vehicles such as airplanes and trains, and sofas and leather chairs installed in buildings and homes.

1 Seat cushion 2 Pad 2a Top surface (first surface)
2b Bottom surface (second surface)
2c Edge 3 Outer skin 3a Edge portion 4 Fixing member 5 Groove (recess)
6 Projection (protrusion)
7 Connecting portion 8 Pressure receiving portion 8a Pressure receiving surface 9 Contact surface 10 Engagement protrusion 11 Sewing portion

Claims (7)

A pad having a first surface facing the seated person and a second surface different from the first surface, and made of an elastic material ;
a sheet-like or bag-like skin covering the first surface of the pad;
a fixing member that fixes the edge portion of the skin to the second surface,
A recess is formed in the second surface at a position where the edge portion is fixed,
The fixing member is manufactured by extrusion molding or injection molding using synthetic resin,
The fixing member has a connecting portion connected to the edge portion, and a convex portion that can fit into the recess,
the edge portion is sewn to the connecting portion;
The connecting portion is formed to have a thickness that makes it easy to sew the edge portion,
The connecting portion is formed with a contact surface that extends in a direction different from the protruding direction of the convex portion and abuts on the second surface while the convex portion is fitted into the concave portion,
The convex portion has elasticity that allows the width of the convex portion to change such that the width of the convex portion is larger than the width of the concave portion in an unloaded state and becomes smaller than the width of the concave portion in a pressurized state. has,
A sheet characterized by: The recess is a groove that extends in the vicinity of the edge of the second surface in a direction parallel to the direction in which the edge of the second surface extends,
The convex portion is a protrusion that fits into at least a portion of the groove,
The sheet according to claim 1. The fixing member further includes a pressure-receiving surface that extends in a direction different from the protruding direction of the convex portion and receives a pressing force that allows the fixing member to fit into the recess.
The sheet according to claim 1 or 2 . The contact surface is provided with protrusions and ribs,
The sheet according to claim 1 . The convex portion has an engagement protrusion on the outer surface of the convex portion that can engage with the inner circumferential surface of the recess on the outer circumferential surface thereof.
A sheet according to any one of claims 1 to 4 . The edge portion is folded back so as to cover the sewn portion with the connecting portion .
A sheet according to any one of claims 1 to 5 . In a configuration in which the second surface has a plurality of corners, and the skin has a plurality of edges corresponding to the plurality of corners, respectively,
further comprising a wire connecting the edges;
A sheet according to any one of claims 1 to 6 .