JP2015167672A - vehicle seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a seat cover be hardly stretched even if setting a coupling part of cover pieces of the seat cover at a shallow position in a seat pad to receive an occupant body pressure.SOLUTION: There is provided a vehicle seat 1 made by bringing a coupling part 21B between cover pieces 21 of a back cover 20 in a back pad 10. The coupling part 21B connects the cover pieces 21 to each other by a flexible tying member 30 capable of tying the cover pieces 21 in such a state as detached from each other. The tying member 30 is retained in such a state as closing the clearance between the cover pieces 21 by a member's own resilient force in an initial state before the body pressure of an occupant is applied to the back cover 20. The vehicle seat is configured to deform the cover pieces 21 to the shape tying in such a state as detached from each other by applying the body pressure of the occupant to the back cover 20 with a strong force exceeding the above-mentioned retaining force to apply a tension in the direction in which the cover pieces 21 are detached from each other.

Description

  The present invention relates to a vehicle seat. More specifically, the present invention relates to a vehicle seat in which a connecting portion between adjacent cover pieces of a seat cover is drawn into a seat pad.

  Conventionally, in a vehicle seat, a configuration in which a seat cover is integrally foamed on the surface of a seat pad is known (Patent Document 1). By the integral molding, the seat cover is stretched in a state of being in close contact with the surface of the seat pad. The above-mentioned seat cover is provided in a state in which a joint portion by stitching adjacent cover pieces is drawn into the seat pad to form a sewing line that is recessed in a streak shape on the surface of the seat cover.

Japanese Patent Application Laid-Open No. 11-225846

  However, in the above-described prior art, when the connecting portion between the cover pieces of the seat cover is set at a deep position in the seat pad, the drawing shape of the connecting portion is opened, and the normal appearance of the seat surface is impaired. Further, if the coupling portion is set at a shallow position in the seat pad, the seat cover tends to stretch out when the occupant's body pressure is applied to the seat cover, resulting in poor ride comfort. The present invention was devised as a solution to the above-mentioned problem, and the problem to be solved by the present invention is that the connecting portion between the cover pieces of the seat cover is set at a shallow position in the seat pad. Therefore, the seat cover is configured not to be stretched even when subjected to the body pressure of the occupant.

In order to solve the above problems, the vehicle seat of the present invention takes the following means.
A first invention is a vehicle seat in which a connecting portion between adjacent cover pieces of a seat cover is provided by being pulled into a seat pad. The connecting portion between the cover pieces has a configuration in which the cover pieces are connected to each other by a flexible connecting member having a shape that allows the cover pieces to be connected in a state of being separated from each other. In the initial state before the occupant's body pressure is applied to the seat cover, the connecting member is held in a state where the gap between the cover pieces is closed by its own elastic force or the elastic force received from the seat pad. When the occupant's body pressure is applied to the seat cover with a strong force exceeding, and tension is applied between the cover pieces, the cover pieces are deformed to be connected in a state of being separated from each other. Yes.

  According to the first aspect of the present invention, the coupling portion that couples the cover pieces is held in a state where the gap between the cover pieces is closed via the connecting member in the initial state. And the said connection member deform | transforms into the form which connects the cover pieces in the state mutually pulled apart, when the strong force exceeding the said holding force is applied to a seat cover. Thereby, the substantial perimeter of the seat cover is expanded, and the seat cover can be made difficult to stretch. Therefore, even if the coupling portion is set at a shallow position in the seat pad, the seat cover can be configured not to be stretched even when subjected to the body pressure of the occupant.

  The second invention is the following configuration in the first invention described above. The connecting member is configured to hold the gap between the cover pieces in a closed state by its own elastic force.

  According to the second aspect of the present invention, even when the seat pad is deteriorated due to aging, the gap between the cover pieces can be stably kept closed by the elasticity of the connecting member itself.

  The third invention is the following configuration in the first or second invention described above. The connecting member is configured to elastically sandwich the cover pieces so as to wrap the cover pieces from the outer peripheral side on the back side and hold the gap between the cover pieces in a closed state.

  According to the third aspect of the invention, since the connecting member is difficult to see from the outside in the initial state, the seat cover can be configured with better appearance.

1 is a perspective view illustrating a schematic configuration of a vehicle seat of Example 1. FIG. It is a front view of a seat back. It is the III-III sectional view taken on the line of FIG. FIG. 6 is a cross-sectional view illustrating a state in which a passenger's body pressure is applied to the seat back and a connecting member is opened. It is a perspective view of the state of the said FIG. It is sectional drawing showing the state which set the seat cover in the foaming mold of the seat pad, inject | poured the foaming resin raw material, and clamped. It is sectional drawing showing the state which foam-molded the seat pad within the shaping | molding die.

  EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated using drawing.

  First, the configuration of the sheet 1 according to the first embodiment will be described with reference to FIGS. As shown in FIG. 1, the seat 1 of the present embodiment is configured as a passenger seat of an automobile, and becomes a seat back 2 that serves as a backrest for a seated occupant, a seat cushion 3 that serves as a seating portion, and a head position. The headrest 4 is provided. The seat back 2 is connected to the rear end portion of the seat cushion 3. Moreover, the seat cushion 3 is connected and provided on the floor. The headrest 4 is connected to the upper part of the seat back 2.

  The above-described seat back 2 is covered with a metal back frame 2F (only the side frame 2Fs is shown in FIGS. 3 to 4) and the back frame 2F so as to cover the whole from the upper side. The back pad 10 made of urethane foam that softly receives the backrest load of the occupant and the back cover 20 made of synthetic leather applied to the entire surface of the back pad 10 are configured. Here, the back pad 10 corresponds to the “seat pad” of the present invention, and the back cover 20 corresponds to the “seat cover” of the present invention. 6 to 7, the back cover 20 described above is set in the mold 40 and foamed with the back pad 10 when the back pad 10 is foam-molded. It is in a state of being integrally bonded to the part (skin integrated foam molding).

  Specifically, the above-described back cover 20 is integrally bonded to the surface portion of the back pad 10 as follows. First, the back cover 20 is set on the lower mold 42 of the molding die 40 for foam-molding the back pad 10, and a polyurethane resin raw material PU, which is a foamed resin raw material for the back pad 10, is injected into the upper portion thereof. Next, the upper mold 41 is closed, and the polyurethane resin raw material PU is heated and foamed in the cavity space 43 inside the mold. Thereby, the polyurethane resin raw material PU is heated and foamed into a shape along the shape of the cavity space 43, and the surface portion (the lower surface portion in the drawing) is impregnated into the back surface portion (the upper surface portion in the drawing) of the back cover 20 and hardened. In this state, the back cover 20 is integrally bonded to the surface portion (lower surface portion in the drawing) of the molded back pad 10.

  Here, as shown in FIGS. 1 to 2, the above-described back cover 20 is configured by joining a plurality of cover pieces 21 formed in accordance with the shape of each side surface of the back pad 10 into one sheet. Yes. As shown in FIG. 3, each of the cover pieces 21 has a configuration in which a thin cover pad 22 made of urethane foam is integrally bonded to the back surface portion in a laminated manner. The cover pieces 21 are integrally bonded to the surface portion of the back pad 10 with the cover pads 22 interposed therebetween, whereby the cover pieces 21 are supported by the cover pads 22 more softly than the back pad 10 from the inside. It is supposed to be in a state. With the above-described configuration, the seat back 2 receives the passenger's backrest load very softly in the initial bending region where each cover pad 22 is bent, and the back pad 10 after the cover pad 22 is completely crushed is being bent. From the bending region, a moderate repulsive force can be exerted to be received softly.

  The back cover 20 described above is in a state in which the connecting portions of the cover pieces 21 described above are provided by being drawn into the back pad 10 (retraction groove 11) by integral foaming with the back pad 10, respectively. Yes. Moreover, as shown in FIGS. 1-2, among each said cover piece 21, each cover piece 21 covered on the backrest surface of the seat back 2 becomes those adjacent edges, respectively. The drawing-in portions 21 </ b> A drawn into the back pad 10 are in a state of being in a state in which they are elastically in close contact with each other via a long rubber connecting member 30 (coupling portion 21 </ b> B).

  Specifically, the back cover 20 swells in a mountain shape on the front side of the left and right sides of the cover piece 21 that covers the center support portion 2A of the seat back 2 that receives the back of the seated occupant from the rear side. A connecting portion 21B with each cover piece 21 placed on each side support portion 2B formed in a shape, or a cover piece 21 and a lower center support portion placed on the upper center support portion 2A1 of the center support portion 2A The connecting portions 21 </ b> B with the cover piece 21 placed on 2 </ b> A <b> 2 are connected to each other by the long rubber connecting members 30 described above. Each of the side support portions 2B functions so as to support the waist and both side portions of the seated occupant from both outer sides by means of a shape that swells in a mountain shape on the front side thereof.

  Each of the coupling portions 21B described above is configured to be drawn into the back pad 10. Thereby, on the backrest surface of the seat back 2, a groove shape 2H that is recessed in an H-shaped shape is formed. Then, the long rubber connecting members 30 described above with respect to the H-shaped groove shape 2H are vertically and horizontally intermediate to leave the central intersection 2H1 and left and right upper ends 2H2 of the left and right sides of the H-shape. In the five regions, the retracting portions 21A of the cover pieces 21 adjacent to each other in the height direction or the width direction are coupled to each other over a wide range. At the intersection 2H1 at the center of the left and right sides of the H-shape and the upper ends 2H2 on the left and right sides, the cover pieces 21 are joined together by stitching. In these places, since the three cover pieces 21 are crossed areas where they are joined to each other, these places are foamed when integrally foamed with the back pad 10 by joining these places by stitching. The resin raw material can be bonded without a gap so as not to leak to the outside. The other cover pieces 21 are also joined together by stitching.

  As shown in FIGS. 1 and 3, the connecting members 30 described above can be sandwiched so as to sandwich the retracting portions 21 </ b> A drawn into the back pads 10 of the adjacent cover pieces 21 described above from both outsides. It is configured as a long rubber member having a substantially U-shaped cross section provided with a pair of left and right sandwiching portions 31 and a base portion 32 connecting them. In each free state, each connecting member 30 has a shape in which the gaps between the holding portions 31 are closed (or a shape close to the closed state). Each connecting member 30 opens between the above-described holding portions 31, inserts the edge portion (retracting portion 21 </ b> A) of each cover piece 21 between them, and holds the holding portions 31 on each side and the side facing them. The edge portions (retractable portions 21 </ b> A) of the cover pieces 21 are stitched together so that the edge portions (retracted portions 21 </ b> A) of the cover pieces 21 are connected to each other via only the connecting member 30. Yes.

  Each connecting member 30 described above is integrally formed by integrally foaming the back pad 10 to the above-described back cover 20 so that the outer periphery of the U-shaped cross section of the back pad 10 is covered. The state is satisfied. Thereby, each connection member 30 can always hold | maintain the drawing-in part 21A of each cover piece 21 in the state which was pinched | interposed into each other by each clamping part 31, and was closely_contact | adhered by the elastic force exhibited by itself. In addition, each holding portion 31 is elastically supported by the back pad 10 so as not to be opened to both sides by the back pad 10 so that the above holding force can be exerted strongly.

  As a result, the connecting portion 21B between the cover pieces 21 sandwiched between the connecting members 30 is in a state in which the gap between the cover pieces 21B is closed and elastically adhered in a state before the occupant is seated on the seat 1 (initial state). It is supposed to be kept in the state. As shown in FIGS. 4 to 5, each coupling portion 21 </ b> B has a large occupant leaning on the seat back 2, or a rear collision of the vehicle occurs and the back of the seated occupant strongly presses against the seat back 2. When a strong force exceeding the holding force is applied to the backrest surface (back cover 20) of the hanging seat back 2, a strong tension is applied between the cover pieces 21 in the direction of being separated from each other. 30 is bent and bent so as to open the U-shape, and the retracting portions 21A of the cover pieces 21 are separated from each other. Accordingly, the substantial circumference of the back cover 20 is expanded, and the back of the occupant can be received up to a deep position of the seat back 2 without stretching the back cover 20.

  Therefore, even when the back of the occupant is pressed against the seat back 2 with a strong force, the back cover 20 is hard to stick and does not easily stick to the bottom, so that the ride comfort (backrest feeling) can be improved. Specifically, even if each of the coupling portions 21B is set at a shallow position in the back pad 10, the back cover 20 may be difficult to be stretched even if a large load is input due to the deformation of each of the connecting members 30. it can. Moreover, since the drawing-in portions 21A of the cover pieces 21 drawn into the back pad 10 described above are normally connected to each other in a region close to the surface of the back cover 20 by the connecting members 30. The back pad 10 can be integrally foamed in a state where the opening between the lead-in portions 21A (opening of the groove shape 2H) is kept small. Therefore, the back pad 10 can be formed into a good-looking shape with few openings. In addition, when a large load is input to the back cover 20, the occupant's body can be sunk to a deep position of the seat back 2 by deformation of each connecting member 30. Therefore, when a rear collision of the vehicle occurs, the back of the occupant can be submerged deeply into the seat back 2 to accelerate the initial restraint on the headrest 4 of the occupant's head.

  Further, when a large load is input to the central support portion 2A of the seat back 2, the central support portion 2A and the both sides that are regions where the relative displacement in the front-rear direction between the cover pieces 21 in the back cover 20 increases. By providing the coupling portion 21B between the support portion 2B and the coupling member 30 via the coupling member 30, the coupling member 30 is effectively deformed when a heavy load is input, and the back cover 20 is more stretched. It can be made difficult.

  Thus, according to the configuration of the present embodiment, the coupling portion 21B that couples the cover pieces 21 is a gap between the cover pieces 21 via the connecting member 30 in the initial state before the occupant's body pressure is applied. Is kept closed. The connecting member 30 is deformed into a shape in which the cover pieces 21 are connected to each other in a state of being separated from each other by applying a strong force exceeding the holding force to the back cover 20 (seat cover). Thereby, the substantial perimeter of the back cover 20 is expanded, and the back cover 20 can be made difficult to stretch. Therefore, even if the coupling portion 21B is set at a shallow position in the back pad 10 (seat pad), the back cover 20 can be configured not to be stretched even when subjected to the body pressure of the occupant.

  In addition, since the connecting member 30 is configured to hold the gap between the cover pieces 21 in a closed state by its own elastic force, the connecting member 30 itself can be used even when the back pad 10 is sagged due to aging. Due to this elasticity, the gap between the cover pieces 21 can be stably kept closed.

  Further, the connecting member 30 is configured to elastically sandwich the cover pieces 21 so as to wrap the cover pieces 21 from the outer peripheral side on the back side and hold the gap between the cover pieces 21 in a closed state. Since 30 becomes difficult to be seen from the outside, the back cover 20 can be configured more attractively.

  As mentioned above, although the embodiment of the present invention has been described using one example, the present invention can be implemented in various forms in addition to the above example. For example, the “vehicle seat” of the present invention can be applied to a seat other than a passenger seat of an automobile, and may be a seat applied to a vehicle other than an automobile such as a railway, The present invention can be widely applied to seats used for various vehicles such as ships. In addition to the seat back, the configuration of the present invention can be applied to a seat cushion and a headrest.

  Further, the “connecting member” may have any flexible structure provided with a shape that allows the cover pieces to be connected in a state of being separated from each other. Or a resin material. In addition, during normal times, the force for holding the gap between the cover pieces closed may be exerted by the elastic force received from the seat pad instead of the elastic force of the “joining member”. That is, the “joining member” does not necessarily have elasticity (rigidity) for keeping the gap between the cover pieces closed, and the cover pieces such as a belt-like cloth material are simply separated from each other. It may be configured to have a shape that can be connected with each other. Further, the “joining member” may be disposed at a position sandwiched between the cover pieces.

  Further, the “seat cover” may be made of a fabric (fabric, woven fabric, etc.) in addition to leather (genuine leather, synthetic leather, artificial leather, etc.). Further, the “seat cover” may be configured by connecting cover pieces made of different materials. Further, the “seat cover” is not limited to being provided in a state of being integrally foamed and bonded to the seat pad, and may be provided by being attached to the surface of the seat pad. That is, the “seat cover” only needs to be provided so that the connecting portion between the adjacent cover pieces is drawn into the seat pad.

DESCRIPTION OF SYMBOLS 1 Seat 2 Seat back 2A Center support part 2A1 Upper side center support part 2A2 Lower side center support part 2B Side support part 2H Groove shape 2H1 Intersection 2H2 Upper end part 2F Back frame 2Fs Side frame 3 Seat cushion 4 Headrest 10 Back pad (seat pad)
11 Pull-in groove PU Polyurethane resin material 20 Back cover (seat cover)
21 Cover piece 21A Pull-in part 21B Coupling part 22 Cover pad 30 Connecting member 31 Holding part 32 Base part 40 Mold 41 Upper mold 42 Lower mold 43 Cavity space

Claims (3)

A vehicle seat provided with a connecting portion between adjacent cover pieces of a seat cover drawn into a seat pad,
The connecting portion between the cover pieces has a configuration in which the cover pieces are connected to each other by a flexible connecting member having a shape capable of connecting the cover pieces in a state of being separated from each other.
In the initial state before the occupant's body pressure is applied to the seat cover, the connecting member keeps the gap between the cover pieces closed by its own elastic force or the elastic force received from the seat pad. When the body pressure of the occupant is applied to the seat cover with a strong force exceeding the holding force and tension is applied between the cover pieces, the cover pieces are connected in a state of being separated from each other. A vehicle seat characterized by being configured to deform into a shape. The vehicle seat according to claim 1,
The vehicle seat according to claim 1, wherein the connecting member is configured to hold the gap between the cover pieces in a closed state by its own elastic force. The vehicle seat according to claim 1 or 2,
The vehicle seat, wherein the connecting member is configured to elastically sandwich the cover pieces so as to wrap the cover pieces from the outer peripheral side on the back side and hold the gap between the cover pieces in a closed state.

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