seat

Abstract

To provide a seat that can keep a resin clip from falling off from a cushion pad even when heat is applied to the resin clip and stably maintain fixation of a trim to the cushion pad.SOLUTION: A cushion pad includes a hard pad 111 made of a bead foam, and includes a groove part 11c in the hard pad 111 on a reverse side. A resin clip 13 includes a trim fixing part 13a fixing a trim 12, a base part 13b inserted into the groove part 11c, and a curved part 13d continuous at a bottom end 13c of the base part 13b. The resin clip 13 further includes barb parts 13f-13h. The barb part 13h is continuous to the curved part 13d and a tip part 13h1 is pushed into the hard pad 111 from a side wall surface 11c2. The barb parts 13f, 13g are continuous to the base part 13b, and the tip parts 13f1, 13g1 are pushed into the hard pad 111 from a side wall surface 11c1.SELECTED DRAWING: Figure 7

Description

Technical Field

[0001] The present invention relates to a seat, and particularly to a fixing structure of a trim for a cushion pad.

Background Art

[0002] In seats such as automotive seats, in a seat cushion that supports the buttocks of a seated person and a seat back that supports the back of the seated person, a structure is adopted in which a cushion pad made of a resin material or the like is covered with a trim made of leather or vinyl leather. The fixing of the trim to the cushion pad is performed on the back surface of the cushion pad (the surface opposite to the side where the buttocks or back hits).

[0003] Patent Document 1 discloses a structure in which a plurality of groove portions are provided on the back surface of a cushion pad, and the trim is fixed by inserting resin clips into each of the plurality of groove portions. The resin clip used in the structure of Patent Document 1 has a trim fixing portion to which the edge portion of the trim is fixed, a plate-shaped base portion inserted into the groove portion of the cushion pad, and a pressing portion that extends from the lower end of the base portion (the insertion end portion into the groove portion) toward the opening side of the groove portion and has flexibility, and is integrally formed. And in a state where the base portion and the pressing portion of the resin clip are inserted into the groove portion, the pressing portion applies an outward pressing force (outward in the cross-sectional direction of the groove portion) to the side wall surface of the groove portion. In the structure disclosed in Patent Document 1, the trim can be attached to and detached from the cushion pad with high workability.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] By the way, in the structure disclosed in Patent Document 1, the resin clip inserted into the groove of the cushion pad is constantly under tension in the direction of fixing the trim to the trim fixing part (the cross-sectional direction of the groove). In this case, situations may arise in which heat is applied to the resin clip. For example, if a seat placed indoors is exposed to direct sunlight, heat may be applied to the resin clip, or if a seat placed inside a car is exposed to heat due to a rise in the interior temperature of the car.

[0006] As described above, when heat is applied to the resin clip, there is a concern that the resin clip, being a component made of resin material, may detach from the groove in the cushion pad due to its tendency to plastically deform when heated. If the resin clip detaches from the groove, a portion of the trim will also detach from the cushion pad along with the resin clip.

[0007] The present invention aims to solve the above-mentioned problems and provides a sheet that can prevent the resin clip from falling off the cushion pad even when heat is applied to the resin clip, and can stably maintain the fixing of the trim to the cushion pad. [Means for solving the problem]

[0008] A seat according to one aspect of the present invention comprises a cushion pad, a trim, and a resin clip. The cushion pad has a support area for supporting a seated person and another area excluding the support area, which has grooves in the thickness direction. The trim has a covering area that covers the support area of ​​the cushion pad and an edge portion positioned near the grooves. The resin clip is made of a resin material and fixes the edge portion of the trim, and fixes the trim and the cushion pad by insertion into the grooves.

[0009] In the sheet according to this embodiment, the resin clip has a base portion, a trim fixing portion, a curved portion, a first return portion, a second return portion, and a third return portion. The base portion is the portion inserted into the groove of the cushion pad. The trim fixing portion is continuous with the upper end of the base portion and is provided so as to extend from the continuous portion along the surface of the cushion pad in a first direction which is one of the width directions of the groove, and is the portion to which the end edge of the trim is fixed. The curved portion has one end continuous with the base portion and the other end is a free end, and has a shape that curves away from the base portion in the first direction from the one end to the other end, and is inserted into the groove together with the base portion while being parallel to the base portion, and is a flexible portion.

[0010] The first return portion is continuous with the portion of the curved portion between one end and the other end, extends from the continuous portion toward the first direction, and has a tapered tip. The second return portion is continuous with the base portion, extends from the continuous portion toward the second direction opposite to the first direction in the width direction of the groove portion, and has a tapered tip. The third return portion is continuous with the portion of the base portion between the portion of the base portion to which the second return portion is continuous and the portion of the trim fixing portion is continuous, extends from the continuous portion toward the second direction, and has a tapered tip.

[0011] Furthermore, in the sheet according to this embodiment, when the base portion and the curved portion of the resin clip are inserted into the groove, the other end is subjected to a pressing force such that it moves closer to the base portion compared to the free state outside the groove.

[0012] Furthermore, in the sheet according to this embodiment, within the groove of the cushion pad, the tip of the first return portion is pushed into the cushion pad from the first side wall surface, which is the side wall surface of the groove in the first direction, due to the reaction force against the pressing force, and the tips of the second return portion and the third return portion are pushed into the cushion pad from the second side wall surface, which is the side wall surface of the groove in the second direction, due to the reaction force against the pressing force.

[0013] As described above, in a structure where the trim is fixed to the cushion pad by inserting a resin clip into the groove, a tension is constantly applied to the trim fixing part in the first direction. When such tension is applied to a resin clip, a rotational moment is applied in the direction that causes the bottom end of the base (the end inserted into the back of the groove) to move in the second direction. If heat is applied to the resin clip in response to such a rotational moment, the resin clip will try to fall out of the groove.

[0014] However, in the sheet according to the above embodiment, the resin clip is provided with a first to third return portion, and the tip of each of these return portions is inserted into (pressed into) the cushion pad, so even when heat is applied to the resin clip, the return portion prevents the resin clip from falling off.

[0015] Furthermore, when the above rotational moment is applied to the resin clip, the tips of the second and third return portions penetrate more deeply into the cushion pad, which is advantageous in effectively suppressing the detachment of the resin clip.

[0016] Furthermore, the resin clip is also provided with a first return portion that is continuous with the portion between one end and the other end of the curved section. As a reaction force to the pressing force, a continuous force is applied to the tip of the first return portion in a direction that causes it to penetrate deeper into the cushion pad in the first direction. Therefore, the position of the base portion in the groove is stably maintained, and it is unlikely that the base portion or the curved portion will rattle within the groove.

[0017] In the sheet according to the above embodiment, the tip of the first return portion and the tip of the second return portion may be provided such that their respective tips are at the same height in the groove depth direction of the groove portion.

[0018] In the sheet according to the above embodiment, the tip of the first return portion and the tip of the second return portion of the resin clip are positioned at the same height in the depth direction of the groove, which is advantageous in maintaining the posture of the base portion, and consequently the posture of the resin clip, in an appropriate position within the groove.

[0019] In the sheet according to the above embodiment, the first return portion, the second return portion, and the third return portion may each be provided such that their tip faces the surface side of the cushion pad where the opening of the groove portion is provided.

[0020] In the sheet according to the above embodiment, the tips of the first to third return portions of the resin clip are positioned to face the surface of the cushion pad on the side where the groove opening is provided. Therefore, when a force is applied that causes the resin clip to fall out of the groove, the tips of each return portion will penetrate the cushion pad more deeply. Thus, the sheet according to the above embodiment is even more advantageous in suppressing the detachment of the resin clip from the groove of the cushion pad.

[0021] In the sheet according to the above aspect, each of the groove portion of the cushion pad and the resin clip is formed to extend in a fourth direction that is orthogonal to both the third direction, which is the insertion direction of the base portion, and the first direction. The cushion pad further has a communication groove portion that is provided so as to be continuous with the groove portion and recess from the second side wall surface in a region that is a part of the fourth direction in the groove portion and up to a portion where the second return portion is located in the third direction.

[0022] In the sheet according to the above aspect, since a communication groove portion is provided in the cushion pad, it is possible to remove the resin clip from the groove portion by inserting a tool (for example, a rod-shaped tool such as a minus driver) into the communication groove portion to release the biting of the cushion pad by the second return portion and the third return portion. Therefore, for example, when an end user tries to replace a trim, it is possible to suppress a situation where the periphery of the groove portion in the cushion pad peels off.

[0023] In the sheet according to the above aspect, the cushion pad may have a portion made of a bead foam, and the groove portion and its peripheral region may be disposed in the portion made of the bead foam.

[0024] In the sheet according to the above aspect, since at least the groove portion and its surroundings are disposed in the portion made of the bead foam, the tip of each return portion of the resin clip can be surely pierced into the cushion pad.

[0025] In the sheet according to the above aspect, the third return portion may have a flat surface portion that intersects the groove depth direction of the groove portion in the vicinity of the tip portion and faces the opening side of the groove portion.

[0026] In the sheet according to the above aspect, since the third folded portion has a flat portion in the vicinity of the tip portion, when an operator or the like inserts a resin clip into the groove portion, it is possible to confirm that the resin clip is inserted to an appropriate depth depending on the position of the flat portion in the depth direction of the groove portion. Therefore, in the sheet according to the above aspect, it is possible to suppress the occurrence of a situation where the resin clip is inserted into the groove portion in an incomplete state, and it is possible to more effectively suppress the resin clip from falling off from the groove portion.

[0027] In the sheet according to the above aspect, the curved portion may be formed such that the other end thereof points in the first direction, and is formed in a tapered shape from the vicinity of the other end toward the other end, and the other end of the curved portion may be pushed into the cushion pad from the first side wall surface.

[0028] In the sheet according to the above aspect, the curved portion of the resin clip is formed in a tapered shape from the vicinity of the other end toward the other end, and the other end is pushed into the cushion pad from the first side wall surface, so that it is possible to suppress rattling of the resin clip inserted into the groove portion within the groove portion and maintain the posture of the resin clip in a stable state.

Effect of the Invention

[0029] In the sheet according to each of the above aspects, even when heat is applied to the resin clip, it is possible to suppress the resin clip from falling off from the cushion pad, and it is possible to stably maintain the fixing of the trim to the cushion pad.

Brief Description of the Drawings

[0030] [Figure 1] It is a developed view showing the configuration of the sheet according to the embodiment. [Figure 2] It is a perspective view showing the configuration of the back surface of the cushion pad. [Figure 3] It is an enlarged perspective view showing the configuration of the groove portion in the cushion pad. [Figure 4]This is a cross-sectional view showing the structure of the cushion pad and the structure for fixing the trim to the cushion pad. [Figure 5] This is an enlarged cross-sectional view showing a magnified view of section A in Figure 4. [Figure 6] This is a perspective view showing the structure of a resin clip. [Figure 7] This is a cross-sectional view showing the state in which a resin clip is attached to the groove of the cushion pad. [Figure 8] This is a cross-sectional view illustrating the role played by the flat portion of the return section in a resin clip. [Figure 9] This is a cross-sectional view illustrating the procedure for removing the resin clip from the groove of the cushion pad. [Modes for carrying out the invention]

[0031] The embodiments of the present invention will be described below with reference to the drawings. The forms described below are merely examples of the present invention, and the present invention is not limited to these forms except for its essential configuration.

[0032] [Embodiment] 1. Outline of Sheet 1 The seat 1 according to this embodiment is, for example, a seat for a vehicle such as an automobile, and is used as a rear seat.

[0033] The general structure of seat 1 will be explained using Figures 1 and 2. Note that in the figures attached to this specification, only the seat cushion 10 of seat 1 is shown, and the seat back is not shown.

[0034] As shown in Figure 1, the seat cushion 10 of seat 1 comprises a cushion pad 11 and a trim 12. The cushion pad 11 supports the buttocks of the sitter with its front surface 11a. That is, the front surface 11a of the cushion pad 11 corresponds to the "support area," and the other areas correspond to the "other areas."

[0035] As shown in Figure 2, the cushion pad 11 is constructed by laminating a hard pad 111 and a soft pad 112. The hard pad 111 is relatively hard compared to the soft pad 112. The soft pad 112 is laminated on the front surface 11a and front surface 11d of the cushion pad 11 so as to cover the surface of the hard pad 111. The hard pad 111 is exposed to the outside on the back surface 11b of the cushion pad 11.

[0036] In this embodiment, the hard pad 111 is made of a bead foam such as EPS (Expanded Polystyrene) and has shape retention properties. The soft pad 112 is made of foamed urethane resin and has elasticity.

[0037] As shown in Figure 1, the trim 12 is provided so as to cover at least the front surface 11a and front surface 11d of the cushion pad 11. In this embodiment, the area of ​​the trim 12 that covers the front surface 11a and front surface 11d of the cushion pad 11 corresponds to the "covering area". The trim 12 is made of a sheet-like material such as leather or vinyl leather.

[0038] As shown in Figure 2, when the cushion pad 11 is viewed from the back surface 11b side, the hard pad 111 is exposed to the outside on the back surface 11b of the cushion pad 11, except for the edges. Multiple grooves 11c are provided along the outer edge of the hard pad 111. Each of the multiple grooves 11c has a long rectangular opening.

[0039] 2. Structure of the groove 11c and its surrounding portion The configuration of the groove 11c and its surrounding area will be explained with reference to Figure 3. Figure 3 shows one of the multiple grooves 11c provided on the back surface 11b of the cushion pad 11, and the other grooves 11c have a similar configuration. Note that the relationship between the X and Y directions in Figure 3 and the direction of the groove 11c varies depending on the location of the groove 11c.

[0040] As shown in Figure 3, the groove 11c has a rectangular opening that is elongated in the Y direction. It is provided so as to be recessed from the back surface 11b of the cushion pad 11 toward the Z direction (towards the front surface 11a side).

[0041] The cushion pad 11 is provided with two communication grooves 11e adjacent to the groove 11c, in the longitudinal direction (Y direction) of the groove 11c. The communication grooves 11e are provided on the back surface 11b of the cushion pad 11, on the side opposite to the edge, and have a semicircular opening.

[0042] The two connecting grooves 11e are spaced apart from each other in the longitudinal direction (Y direction) of the groove 11c. The connecting grooves 11e are provided at approximately the same depth as the groove 11c and are provided to be continuous with the groove 11c in the entire depth direction.

[0043] The purpose of forming the connecting groove 11e will be explained later.

[0044] 3. Fixing structure of trim 12 to cushion pad 11 The fixing structure of the trim 12 to the cushion pad 11 in the seat cushion 10 will be explained with reference to Figures 4 and 5. Figure 5 is an enlarged cross-sectional view of part A in Figure 4.

[0045] As shown in Figures 4 and 5, on the back surface 11b of the cushion pad 11, the hard pad 111 is exposed to the outside at the edge of the back surface 11b. The trim 12 is arranged to cover the area from the front surface 11a of the cushion pad 11 to the edge of the back surface 11b. The edge portion 12a of the trim 12 that is located on the back surface 11b side of the cushion pad 11 is fixed to the resin clip 13. In the sheet 1, the number of resin clips 13 is the same as the number of grooves 11c formed in the cushion pad 11.

[0046] As shown in Figure 5, the resin clip 13 is made of polypropylene as an example, and consists of a trim fixing portion 13a, a base portion 13b, and a curved portion 13d formed in a continuous manner. The trim fixing portion 13a is the part to which the end edge portion 12a of the trim 12 is fixed, and is provided to extend along the back surface 11b of the cushion pad 11 toward the edge of the cushion pad 11.

[0047] The base portion 13b is formed to extend in the Z direction, with its upper end in the Z direction being continuous with the right end in the X direction of the trim fixing portion 13a, and is inserted into the groove portion 11c. The length of the base portion 13b in the Z direction is set so that its bottom end 13c is close to the bottom of the groove portion 11c.

[0048] The curved portion 13d is continuous with the bottom end 13c of the base portion 13b and has a cross-sectional shape that curves in an arc towards the opening side of the groove portion 11c. Except for the portion continuous with the base portion 13b, the curved portion 13d is positioned at a distance to the left in the X direction relative to the base portion 13b. The curved portion 13d is flexibly provided with the portion continuous with the base portion 13b as its base point.

[0049] In Figures 4 and 5, the left direction in the X-direction corresponds to the "first direction," the right direction in the X-direction corresponds to the "second direction," the Z direction corresponds to the "third direction," and the direction perpendicular to the plane of the paper (the longitudinal direction of the groove 11c) corresponds to the "fourth direction."

[0050] 4. Detailed structure of resin clip 13 The detailed structure of the resin clip 13 will be explained using Figure 6. Note that in Figure 6, only one of several resin clips 13 is shown, and the relationship between the X and Y directions and the direction of the resin clip 13 in Figure 6 will vary depending on the position where each resin clip 13 is placed.

[0051] As shown in Figure 6, the resin clip 13 has an elongated shape in which the Y-direction dimension is longer than the X-direction and Z-direction dimensions, and is formed to match the dimensions of the groove 11c into which it is inserted. The Y-direction dimension of the resin clip 13 is set to, for example, 50 mm to 150 mm. The X-direction dimension of the resin clip 13 is set to, for example, 15 mm to 25 mm. The Z-direction dimension of the resin clip 13 is set to, for example, 15 mm to 25 mm.

[0052] As described above, the curved portion 13d is continuous with the base portion 13b at its bottom end 13c, and extends in an arc shape from the continuous portion toward the tip 13i upward in the Z direction. In the curved portion 13d, the portion continuous with the base portion 13b corresponds to "one end," and the tip 13i corresponds to "the other end."

[0053] A recessed portion 13j is provided in the continuous section between the curved portion 13d and the base portion 13b. The recessed portion 13j is a portion that is recessed from the point where the outer surface on the left side in the X direction of the base portion 13b and the outer surface on the right side in the X direction of the curved portion 13d meet toward the bottom end 13c. The recessed portion 13j is provided to make it easier for the curved portion 13d to flex, with the continuous section between the base portion 13b and the curved portion 13d as the starting point.

[0054] The tip 13i of the curved portion 13d is positioned with a gap G1 between it and the lower outer surface in the Z direction of the trim fixing portion 13a, and with a gap G2 between it and the left outer surface in the X direction of the base portion 13b, and is a free end.

[0055] The thickness of the curved portion 13d is set to be thinner than the thickness of the base portion 13b. By setting the thickness of the curved portion 13d to be thinner than the thickness of the base portion 13b in this way, when the base portion 13b and the curved portion 13d are inserted into the groove portion 11c, the curved portion 13d can bend due to the reaction force from the side wall surface of the groove portion 11c, while the base portion 13b can not bend. In this embodiment, the thickness of the base portion 13b is in the range of 1.0 mm to 4.0 mm, and the thickness of the curved portion 13d is in the range of 1.0 mm to 2.5 mm, and is thinner than the thickness of the base portion 13b.

[0056] The resin clip 13 further includes a recess 13e, a return portion (third return portion) 13f, a return portion (second return portion) 13g, and a return portion (first return portion) 13h. The recess 13e is a portion formed to recess upward in the Z direction from the lower outer surface in the Z direction of the trim fixing portion 13a, and is used when fixing the trim 12.

[0057] The return portion 13h is continuous with the portion of the curved portion 13d between the continuous portion with the base portion 13b and the tip portion 13i, and is formed to extend diagonally upward to the left. The portion where the curved portion 13d and the return portion 13h are continuous is the leftmost portion of the curved portion 13d in the X direction, and is approximately midway between the continuous portion with the base portion 13b and the tip portion 13i in the Z direction. The tip portion 13h1 of the return portion 13h is formed with a tapered shape so as to point diagonally upward to the left (towards the back surface 11b of the cushion pad 11).

[0058] The return portion 13g is formed to extend upward in the Z direction from the vicinity of the bottom end 13c of the base portion 13b, in the direction to the right in the X direction (opposite to the side where the curved portion 13d is located). The tip portion 13g1 of the return portion 13g is formed with a tapered shape so as to point diagonally upward to the right (towards the back surface 11b of the cushion pad 11). In the Z direction, the tip portion 13h1 of the return portion 13h and the tip portion 13g1 of the return portion 13g are located at approximately the same height.

[0059] The return portion 13f is provided so as to be continuous with the base portion 13b at a point slightly below the portion where the trim fixing portion 13a is continuous with the base portion 13b. The return portion 13h, like the return portion 13g, is oriented to the right in the X direction (opposite to the side where the curved portion 13d is located) and is formed to extend upward in the Z direction. The tip portion 13f1 of the return portion 13f is also formed with a tapered shape so as to be oriented diagonally upward to the right (towards the back surface 11b of the cushion pad 11). Furthermore, the return portion 13f has a flat portion 13f2 near the tip portion 13f1 that extends in a direction perpendicular to the Z direction. The flat portion 13f2 is formed so as to extend in a direction substantially perpendicular to the outer surface on the right side in the X direction of the base portion 13b.

[0060] 5. Attachment configuration of the resin clip 13 to the groove 11c of the cushion pad 11. The configuration for attaching the resin clip 13 to the groove 11c of the cushion pad 11 will be explained using Figure 7. In Figure 7, however, only one set of multiple grooves 11c and multiple resin clips 13 is shown, and the relationship between the X and Y directions in Figure 7 and the directions of the grooves 11c and resin clip 13 will vary depending on their respective positions.

[0061] As shown in Figure 7, in the seat cushion 10, with the trim 12a fixed to the trim fixing portion 13a, the base portion 13b and curved portion 13d of the resin clip 13 are inserted into the groove 11c of the cushion pad 11. The back surface 11b of the cushion pad 11 is provided with a recess 11f that is continuous with the groove 11c to the left in the X direction. The depth of the recess 11f in the Z direction is set to be approximately the same as the thickness of the trim fixing portion 13a of the resin clip 13. Therefore, when the base portion 13b and curved portion 13d of the resin clip 13 are inserted into the groove 11c, the trim fixing portion 13a fits into the recess 11f.

[0062] The base portion 13b inserted into the groove 11c is positioned such that its bottom end 13c is close to the bottom of the groove 11c. Furthermore, the base portion 13b is positioned such that both outer surfaces in the X direction are spaced apart from the side walls 11c1 and 11c2 of the groove 11c.

[0063] Here, when the base portion 13b and the curved portion 13d are inserted into the groove portion 11c, the tip 13i of the curved portion 13d is subjected to a pressing force in the groove width direction (X direction) so that it approaches the base portion 13b, compared to the free state in which the resin clip 13 is not inserted into the groove portion 11c. Within the groove portion 11c, the base portion 13b and the curved portion 13d constantly apply a reaction force to the pressing force in the X direction.

[0064] The curved portion 13d is positioned at a distance from the recess 11c3 and the portion below the recess 11c3, which is located in the middle of the side wall surface 11c2 in the Z direction, relative to the left side wall surface 11c2 in the X direction of the groove 11c. The tip 13i of the curved portion 13d is oriented toward the side of the side wall surface 11c2 (first direction), and is formed with a shape that tapers from near the tip 13i toward the tip 13i. The tip 13i of the curved portion 13d is slightly pushed into the hard pad 111 relative to the portion of the side wall surface 11c2 above the recess 11c3 (arrow B6).

[0065] The return portion 13h is in a state where its tip portion 13h1 is pushed into the hard pad 111 from the recess portion 11c3 of the side wall surface 11c2 (inserted) (arrow B5). Furthermore, the tip portion 13h1 of the return portion 13h is pressed to the left in the X direction by the above reaction force, maintaining a state where it is firmly inserted into the hard pad 111.

[0066] The tip portion 13g1 of the return portion 13g is pushed into the hard pad 111 from the side wall surface 11c1 (inserted) (arrow B4). Due to the reaction force described above, the tip portion 13g1 of the return portion 13g is also firmly embedded in the hard pad 111 which is pressed to the right in the X direction.

[0067] The return portion 13f is in a state where its tip portion 13f1 is pushed into the hard pad 111 from the side wall surface 11c1 (inserted) (arrow B3). However, the tip portion 13f1 of the return portion 13f is inserted into the hard pad 111 such that a part of the flat portion 13f2 remains in the groove portion 11c without being pushed into the hard pad 111.

[0068] Here, the trim 12 is fixed to the cushion pad 11 under tension to prevent wrinkles from forming on the front surface 11a and front surface 11d of the cushion pad 11. As a result, the resin clip 13 to which the trim 12 is fixed is constantly under tension as shown by arrow B1. The resin clip 13, which is constantly under tension as shown by arrow B1, has a rotational moment that causes the bottom end 13c of the base portion 13b to move toward the side wall surface 11c1 on the right side in the X direction (arrow B2).

[0069] If a resin clip does not have a return portion, there is a concern that it may detach from the groove 11c if it undergoes plastic deformation due to heat while under the rotational moment described above.

[0070] However, in the sheet 1 according to this embodiment, the resin clip 13 is provided with three return portions 13f to 13h at the above-mentioned locations, and the tips 13f1, 13g1, and 13h1 of each return portion 13f to 13h are embedded in the hard pad 111, so that even if heat is applied to the resin clip 13 it can be prevented from falling out of the groove 11c.

[0071] 6. The role of the flat portion 13f2 of the return portion 13f in the resin clip 13. The resin clip 13 has a flat portion 13f2 on its return portion 13f, and the role of this flat portion 13f2 will be explained with reference to Figure 8.

[0072] As shown in Figure 8, when the base portion 13b of the resin clip 13 is inserted into the groove 11c, a portion of the flat portion 13f2 of the return portion 13f is exposed further inside the groove 11c than the side wall surface 11c1 of the groove 11c. The flat portion 13f2 is positioned to face the opening side of the groove 11c, and there are no obstructing members above the flat portion 13f2. Therefore, when a worker looks into the groove 11c from the opening, they can see the flat portion 13f2. The worker can then visually confirm whether the resin clip 13 has been inserted into the groove 11c to the correct position by checking the distance D from the opening of the groove 11c to the flat portion 13f2.

[0073] 7. Removal of resin clip 13 Sheet 1 assumes a scenario where an end user wants to replace the trim 12. When replacing the trim 12 in this way, it is necessary to remove the resin clip 13 from the cushion pad 11. The method for removing the resin clip 13 from the cushion pad 11 will be explained using Figure 9.

[0074] As explained using Figure 3, the cushion pad 11 is provided with a connecting groove 11e that is continuous with the groove 11c. As shown in Figure 9, when attempting to remove the resin clip 13 from the cushion pad 11, a rod-shaped tool (for example, a flathead screwdriver) is inserted into the connecting groove 11e from the tip 500a side (arrow C1).

[0075] Insert the tip 500a of the tool 500 to near the bottom of the communication groove 11e, then use the opening edge 11e1 of the communication groove 11e, indicated by arrow C2, as a pivot point to gouge out the tip 500a of the tool 500 so that it moves toward the side wall surface 11c2 (arrow C3).

[0076] As described above, by gouging with the tool 500, the respective tips 13f1 and 13g1 of the return portions 13f and 13g that were embedded in the hard pad 111 from the side wall surface 11c1 are pulled out from the hard pad 111 (arrows C4, C5). Then, while maintaining the elastically deformed state of the return portions 13f and 13g of the resin clip 13, the base portion 13b of the resin clip 13 is slid to the right in the X direction, and the resin clip 13 is removed from the groove 11c together with the tool 500.

[0077] The removal of the resin clip is now complete.

[0078] 8. Effects In a structure in which the trim 12 is fixed to the cushion pad 11 by inserting the resin clip 13 into the groove 11c of the cushion pad 11, tension is constantly applied to the trim fixing portion 13a of the resin clip 13 in the X direction to the left, as shown in Figure 7. When such tension is applied to the resin clip 13, a rotational moment is applied in the direction that causes the bottom end 13c of the base portion 13b to move to the X direction to the right, as shown in Figure 7. If heat is applied to the resin clip 13 in response to such a rotational moment, the resin clip 13 will soften and become more susceptible to plastic deformation, causing it to try to fall out of the groove 11c.

[0079] However, in the sheet 1 according to this embodiment, the resin clip 13 is provided with three return portions 13f to 13h, and the respective tips 13f1, 13g1, and 13h1 of the return portions 13f to 13h are embedded in the hard pad 111 of the cushion pad 11. Therefore, even when heat is applied to the resin clip 13, the return portions 13f to 13h prevent the resin clip 13 from falling off.

[0080] Furthermore, when a rotational moment as indicated by arrow B2 in Figure 7 is applied to the resin clip 13, the respective tip portions 13f1 and 13g1 of the return portions 13f and 13g penetrate more deeply into the hard pad 111 of the cushion pad 11, which is advantageous in effectively suppressing the detachment of the resin clip 13.

[0081] Furthermore, the resin clip 13 is also provided with a return portion 13h that is continuous with the middle of the longitudinal portion of the curved portion 13d. Due to the reaction force, the tip portion 13h1 of the return portion 13h is subjected to a force that causes it to penetrate deeper into the hard pad 111 of the cushion pad 11 in the X direction to the left. As a result, the position of the base portion 13b of the resin clip 13 within the groove portion 11c of the cushion pad 11 is stably maintained, and it is unlikely that the base portion 13b or the curved portion 13d will rattle within the groove portion 11c.

[0082] Furthermore, in the sheet 1 according to this embodiment, the tip portion 13g1 of the return portion 13g and the tip portion 13h1 of the return portion 13h of the resin clip 13 are positioned at the same height in the depth direction of the groove portion 11c, which is advantageous for maintaining the posture of the base portion 13b, and consequently the posture of the resin clip 13, in an appropriate position within the groove portion 11c.

[0083] Furthermore, in the sheet 1 according to this embodiment, the respective tip portions 13f1, 13g1, and 13h1 of the return portions 13f to 13h of the resin clip 13 are positioned to face the back surface 11b side where the opening of the groove portion 11c of the cushion pad 11 is provided. Therefore, when a force is applied that causes the resin clip 13 to fall out of the groove portion 11c, the respective tip portions 13f1, 13g1, and 13h1 of each return portion 13f to 13h will penetrate the cushion pad 11 more deeply. Thus, the sheet 1 is even more advantageous in suppressing the fall of the resin clip 13 from the groove portion 11c of the cushion pad 11.

[0084] Furthermore, in the sheet 1 according to this embodiment, since the cushion pad 11 is provided with a communication groove 11e, the resin clip 13 can be removed from the groove 11c by inserting a tool (for example, a rod-shaped tool such as a flathead screwdriver) 500 into the communication groove 11e and releasing the retaining parts 13f1 and 13g1, respectively, from being stuck in the cushion pad 11. Thus, it is possible to prevent situations such as the area around the groove 11c of the cushion pad 11 from peeling off when, for example, an end user tries to replace the trim 12.

[0085] In this embodiment of the sheet 1, the tips 13f1, 13g1, and 13h1 of the return portions 13f to 13h of the resin clip 13 are tapered. As shown in Figure 7 and other figures, the tips 13f1, 13g1, and 13h1 have a rounded shape (curved surface), which ensures that the resin clip 13 can be easily removed from the groove 11c using the tool 500. Furthermore, when removing the resin clip 13 from the groove 11c, the peeling of the side walls 11c1 and 11c2 around the groove 11c can be suppressed, and the trim 12 can be attached to the cushion pad 11 while ensuring high maintainability.

[0086] Furthermore, if the tips 13f1, 13g1, and 13h1 of the return portions 13f to 13h of the resin clip 13 are made pointed, it will be possible to prevent the resin clip 13 from coming out of the groove 11c even when a rotational moment as shown in Figure 7 is applied to the resin clip 13 due to the tension from the trim 12.

[0087] Furthermore, in the sheet 1 according to this embodiment, at least the groove portion 11c and its surrounding area in the cushion pad 11 are made of a hard pad 111 made of bead foam, so that the respective tip portions 13f1, 13g1, and 13h1 of the return portions 13f to 13h of the resin clip 13 can be reliably inserted into the cushion pad 11.

[0088] Furthermore, in the sheet 1 according to this embodiment, a hard pad 111 made of bead foam with low resilience is used, so even if the return portions 13f to 13h with a rounded tip shape are used as shown in Figures 6 and 7, the tip portions 13f1, 13g1, and 13h1 can be reliably inserted into the hard pad 111.

[0089] Furthermore, in the sheet 1 according to this embodiment, since the return portion 13f has a flat portion 13f2 in the vicinity of the tip portion 13f1, when an operator inserts the resin clip 13 into the groove portion 11c, the position of the flat portion 13f2 in the depth direction of the groove portion 11c allows the operator to confirm that the resin clip 13 has been inserted to the correct depth. Therefore, the sheet 1 can prevent the resin clip 13 from being inserted into the groove portion 11c in an incomplete state, and can more effectively prevent the resin clip 13 from falling out of the groove portion 11c.

[0090] Furthermore, in the sheet 1 according to this embodiment, the tip 13i of the curved portion 13d of the resin clip 13 is also formed to face the side wall surface 11c2, and is formed with a shape that tapers from the vicinity of the tip 13i toward the tip 13i, so that the tip 13i is slightly pushed into the hard pad 111 of the cushion pad 11 from the side wall surface 11c2, thereby suppressing rattling of the resin clip 13 inserted into the groove 11c and maintaining the posture of the resin clip 13 in a stable state.

[0091] As described above, in the sheet 1 according to this embodiment, even if the resin clip 13 is heated and softened, it is possible to prevent the resin clip 13 from falling off the cushion pad 11, and to stably maintain the fixing of the trim 12 to the cushion pad 11.

[0092] [Differentiation] In the above embodiment, a configuration in which the tip 13i of the curved portion 13d of the resin clip 13 is pressed into the cushion pad 11 was adopted as an example. However, in the present invention, it is not necessarily required that the tip of the curved portion be pressed into the cushion pad. For example, the tip of the curved portion may be spaced apart from the side wall surface of the groove.

[0093] In the above embodiment, the cushion pad 11 has a connecting groove 11e in addition to the groove 11c, but in the present invention, the connecting groove is not necessarily required.

[0094] In the above embodiment, the cushion pad 11 was configured to include a hard pad 111 made of bead foam, but in the present invention, the hard pad does not necessarily have to be made of bead foam. Furthermore, it is not essential that the cushion pad has a laminated structure of a soft pad and a hard pad. For example, a single-layer cushion pad can be used, or a cushion pad with a laminated structure of three or more layers can be used.

[0095] In the above embodiment, a configuration was adopted in which a flat portion 13f2 is provided on the return portion 13f of the resin clip 13. However, in the present invention, it is not necessarily required to provide a flat portion 13f2 on the return portion 13f. Instead of providing a flat portion 13f2 on the return portion 13f, a mark for confirming the insertion depth may be placed on the base portion or the like.

[0096] In the above embodiment, the resin clip 13 is provided with three return portions 13f to 13h, but in the present invention, the resin clip may be provided with four or more return portions. [Explanation of Symbols]

[0097] 1 sheet 10 Seat Cushions 11 Cushion pads 11b Back side 11c Groove 11c1, 11c2 side wall 11e Communication groove 12 trim 13 Plastic clips 13b Base section 13d curved section 13f~13h Return section 13f1,13g1,13h1 Tip 13f2 flat part

Claims

1. A cushion pad having a support area for supporting a seated person, and another area excluding the support area, in which grooves are provided in the thickness direction, A trim having a covering region that covers the support region of the cushion pad and an edge portion positioned near the groove, A resin clip, formed from a resin material, to which the edge portion of the trim is fixed, and which secures the trim and the cushion pad by being inserted into the groove, Equipped with, The aforementioned resin clip is The cushion pad includes a base portion inserted into the groove, A trim fixing portion is provided that is continuous with the upper end of the base portion and extends from the continuous portion along the surface of the cushion pad in a first direction which is one of the width directions of the groove portion, and the end edge portion of the trim is fixed to it, One end is continuous with the base portion, the other end is a free end, and the curved portion has a shape that curves away from the base portion in the first direction from the one end to the other end, and is inserted into the groove portion together with the base portion while being parallel to the base portion, and is a flexible curved portion, A first return portion is continuous with the portion between the one end and the other end of the curved portion, extends from the continuous portion toward the first direction, and has a tapered tip. A second return portion is continuous with the base portion and extends from the continuous portion toward a second direction opposite to the first direction in the width direction of the groove portion, and has a tapered tip. A third return portion is continuous with the portion of the base portion between the portion where the second return portion is continuous and the portion where the trim fixing portion is continuous, and extends from the continuous portion toward the second direction, and has a tapered tip. It has, In the resin clip, the base portion and the curved portion are in a state where, when inserted into the groove, the other end is subjected to a pressing force such that it approaches the base portion, compared to the free state outside the groove. Within the groove of the cushion pad, The first return portion is pressed into the cushion pad by the reaction force against the pressing force, with the tip of the first return portion being pushed from the first side wall surface, which is the side wall surface of the groove in the first direction. The second and third return portions are pushed into the cushion pad by the reaction force against the pressing force, with their respective tips pressed in from the second side wall surface, which is the side wall surface of the groove in the second direction. Seat.

2. In the sheet described in claim 1, The tip of the first return portion and the tip of the second return portion are arranged such that their respective tips are at the same height in the groove depth direction of the groove portion. Seat.

3. In the sheet described in claim 1, Each of the first return portion, the second return portion, and the third return portion is provided such that its tip faces the surface side of the cushion pad where the opening of the groove is provided. Seat.

4. In the sheet according to any one of claims 1 to 3, The groove portion of the cushion pad and the resin clip are each formed to extend in a fourth direction perpendicular to both the third direction, which is the insertion direction of the base portion, and the first direction. The cushion pad further has a communication groove provided in a part of the groove in the fourth direction and in the area up to the part where the second return portion is located in the third direction, so as to be continuous with the groove and recessed from the second side wall surface. Seat.

5. In the sheet according to any one of claims 1 to 3, The cushion pad has a portion made of bead foam, The groove and its surrounding region are located in the portion made of the bead foam. Seat.

6. In the sheet according to any one of claims 1 to 3, The third return portion has a flat portion in the vicinity of the tip portion that intersects with the groove depth direction of the groove portion and faces the opening side of the groove portion. Seat.

7. In the sheet according to any one of claims 1 to 3, The curved portion is formed such that the other end points in the first direction, and is tapered from the vicinity of the other end toward the other end. The other end of the curved portion is pushed into the cushion pad from the first side wall surface. Seat.

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