JP6068114B2 - Vehicle seat and vehicle - Google Patents

Description

  The present invention relates to a vehicle seat such as an automobile, particularly a vehicle seat suitable as a rear seat, and a vehicle provided with the vehicle seat.

  As shown in Patent Document 1, a vehicle rear seat is usually used by using a urethane material having a predetermined thickness as a seat cushion pad and placing the seat cushion pad on a floor. In some cases, a cushion pan or wire is used, and a seat cushion pad is disposed thereon. Moreover, the back frame often uses a panel frame as shown in Patent Documents 2 and 3 for the purpose of obtaining a predetermined strength with a simple structure.

JP-A-9-142189 JP 2011-105050 A JP 2001-314272 A

  Since the conventional vehicle rear seat has the above-described configuration, the cushioning property of the seat cushion portion is relatively highly dependent on the thickness of the seat cushion pad. Therefore, if it is going to improve cushioning properties, a pad will become thick and weight will increase. Although it is conceivable that the thickness of the pad is kept within a predetermined level and various spring materials are used in combination, the structure becomes complicated, and there are cases where the weight cannot be reduced so much depending on the type and size of the spring material used. On the other hand, the panel frame used in the back frame has an advantage that the frame structure is simplified and the strength against the load applied from the front and rear can be easily increased, but the weight tends to increase. In particular, the weight of the vehicle rear seat is also required to be lighter in view of the strong demand for energy saving in recent years. Note that these points are not limited to the rear seat, and the same applies to the front seat.

  The present invention has been made in view of the above, and an object of the present invention is to provide a vehicle seat in which the seat back portion can be reduced in thickness and weight with a simple configuration. Another object of the present invention is to provide a vehicle seat capable of reducing the weight of the seat back portion in addition to making the seat back portion thinner and lighter.

  In order to solve the above-described problems, a vehicle seat according to the present invention is a vehicle seat including a seat cushion portion and a seat back portion, and the front edge frame in which the seat cushion portion is disposed at a predetermined interval in the front-rear direction. A cushion frame comprising a rear edge frame and a pair of side frames disposed between corresponding ends of the front edge frame and the rear edge frame; and covering the front edge frame from above, A shape having a main pad portion that extends to a position that supports the bottom of the collar portion, and a lower surface support portion that surrounds the side and rear edge portions of the main pad portion and extends to a position that supports the lower surface of the rear edge portion of the main pad portion. A peripheral pad portion formed, and a portion of the main pad portion and the adjacent side portions of the peripheral pad portion that are close to each other are connected to each other, and A seat cushion pad formed by molding the rear edge portion of the pad portion away from the lower surface support portion of the peripheral pad portion, the seat cushion pad, and the rear edge portion of the main pad portion A seat cushion covering member that provides elasticity that is urged upward on the rear edge side of the main pad portion by being arranged to be pressed against the lower surface support portion of the peripheral pad portion. It is characterized by that.

  When the seat cushion pad has a lower surface support portion that supports the lower surface of the rear edge portion of the main pad portion as a support layer, and the main pad portion is a flexible layer, the lower surface support portion of the peripheral pad portion and the It is preferable to have a three-layer structure in which an intermediate layer made of a material relatively harder than the main pad portion is disposed between the main pad portion and the main pad portion. The intermediate layer is preferably a member whose front edge is supported by the front edge frame and whose rear edge is located between the lower surface support portion of the peripheral pad portion and the main pad portion. The intermediate layer has a front edge portion supported by the front edge frame, and a rear edge portion located between the lower surface support portion of the peripheral pad portion and the main pad portion is elastically biased upward. It is preferable that it is a member provided in. The intermediate layer is preferably formed of a plate member having a front edge portion supported by the front edge frame via a leaf spring, and the rear edge portion being biased upward by the elastic force of the leaf spring. It is preferable that the seat cushion portion includes two side seat portions, and the main pad portion is provided at a position corresponding to each side seat portion.

  The seat cushion portion includes the two side seat portions, and a center seat portion having a predetermined width between the side seat portions, and the peripheral pad portion is disposed outside the side seat portions. Side portions, wide side portions located between the side sheet portions, and the lower surface support portions provided at positions corresponding to the rear edge portions of the side seat portions. It is preferable that the wide side portion of the peripheral pad portion corresponds to the center sheet portion. The main pad portion constituting the side seat portion has a shape in which a front edge portion protrudes forward from the front edge frame of the cushion frame, and the front edge portion has a cross-sectional shape with a gap toward the front. A widening notch is formed in the width direction, and is formed in a shape including an upper front edge and a lower front edge via the notch, and the upper front edge is defined as the lower front edge. It is preferable that a configuration in which elasticity is applied to bias the upper front edge portion in the return direction by applying a load in a direction approaching the portion.

  The wide side portion of the peripheral pad portion constituting the center seat portion has a shape in which a front edge portion projects forward from a front edge frame of the cushion frame, and the front edge portion has a cross-sectional shape. And a notch that extends in the width direction is formed in the width direction, and is formed in a shape including an upper front edge and a lower front edge through the notch, and the upper front edge is It is preferable that a configuration in which elasticity is applied to bias the upper front edge portion in the return direction by applying a load in a direction approaching the lower front edge portion. In the cushion frame, a wire is stretched between the front edge frame and the rear edge frame at positions corresponding to both side portions of the main pad portion of the side seat portion constituting the seat cushion pad, and the wire is used. It is preferable that the seat cushion covering member is attached.

  The seat back portion includes a back frame connected to the cushion frame via a bracket, and the back frame is formed in an outer frame frame formed in a substantially rectangular shape, and along the vertical direction in the outer frame frame. A trunk support plate that is disposed and supports the back of the seated person is preferable. The seat cushion pad includes the center seat portion and the side seat portions on both sides thereof, and the outer frame frame constituting the back frame has a width obtained by combining the one side seat portion and the center seat portion. A first outer frame frame formed in a substantially square shape so as to have a width, and a second outer frame frame formed in a substantially square shape so as to have a width corresponding to the other side seat portion. In the first outer frame frame, two trunk support plates are provided at a predetermined interval corresponding to each of the one side seat portion and the center seat portion. It is preferable that the trunk support plate is provided in the frame frame corresponding to the other side seat portion.

It is preferable that the trunk support plate is configured to be deformed into a substantially square shape centering on a midway portion in the vertical direction when a predetermined load or more is applied. The trunk support plate is preferably formed in a substantially U-shaped cross section. A groove is formed at an appropriate position of the seat back pad supported by the back frame in the seat back portion or the seat cushion pad supported by the cushion frame in the seat cushion portion, Further, a shape accent for a design is formed by the seat back covering member covering the seat back pad or the seat cushion covering member covering the seat cushion pad being suspended through the surface fastener. It is preferable. One surface fastener is attached to the side wall surface of the groove, and the other surface fastener is attached to the seat back covering member or the seat cushion covering member, and the other surface fastener is placed in the groove. If the hooks and loops of the hook-and-loop fasteners are engaged, the hook-and-loop fasteners of the hook-and-loop fasteners are engaged with each other. It is preferable that it is attached.
The vehicle seat is suitable for use as a rear seat.

  In the vehicle of the present invention, the vehicle seat is disposed on a rear seat support floor provided with a step at the rear of the vehicle, with the cushion frame fixed to the rear seat support floor. It is characterized by being. In the rear seat support floor portion, at least one side frame of the cushion frame protrudes outward along the vehicle width direction of the rear seat support floor portion, and an article is accommodated below the protruding at least one side frame. It is preferable that a possible space is formed.

  According to the vehicle seat of the present invention, the seat cushion pad includes the main pad portion and the peripheral pad portion, and the rear edge portion of the main pad portion is biased upward with respect to the peripheral pad portion. It is installed on the cushion frame in a state having elasticity. That is, the main pad portion on which a person is seated has elasticity upward without providing a metal spring or the like. Therefore, even if it is made of a thinner material than conventional ones (urethane etc.), it is possible to obtain the desired stroke characteristics, vibration absorption characteristics, shock absorption characteristics, etc. when seated, and it has a simple structure and is lightweight. Can contribute.

  Further, the present invention has a configuration in which the back frame is not a panel, but a substantially rectangular outer frame frame, and a trunk support plate arranged in the outer frame frame so as to support the back of the seated person. . Therefore, the weight of the entire back frame becomes lighter than that in the case of using the panel, which contributes to the weight reduction of the entire vehicle rear seat. That is, instead of increasing the strength of the entire seat back part as in the panel frame, the center support plate is supported near the center in the width direction of the back of the seated person, which is a load, and it is supported by the outer frame frame. By supporting it, the weight is reduced by increasing the strength of necessary parts. As a result, when a large force is applied in the direction in which the back of the seated person is pressed against the seat back part, the outer frame frame receives a large force while supporting the back of the seated person with the trunk support plate. The entire back frame including the frame and the trunk support frame can be displaced rearward to absorb the impact. In addition, when a large impact is applied to the front and rear, the seat cushion part transmits the impact to the front and rear via the cushion frame, and further to the body via the body mounting bracket that fixes the cushion frame and the back frame to the body. And efficiently distributed. On the other hand, when a load of a predetermined level or more is applied due to the forward movement of the luggage in the cargo compartment disposed behind the vehicle seat, the trunk support plate is formed in a substantially square shape centering on the middle part in the vertical direction. Shock can be absorbed while deforming. In particular, the trunk support plate is preferably formed to have a substantially U-shaped cross section, so that a load exceeding a predetermined value due to the movement of the load in the cargo compartment is buckled so that the substantially U-shaped cross section is opened. It can be deformed and absorbed more effectively. Accordingly, the present invention is particularly suitable as a rear seat, but can also be applied to a front seat.

FIG. 1 is an external perspective view of a vehicle rear seat according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of FIG. FIG. 3 is a perspective view of the cushion frame and the back frame as viewed from the rear. 4A is an external perspective view of a vehicle rear seat, FIG. 4B is a cross-sectional view taken along line AA of FIG. 4A, and FIG. 4C is FIG. FIG. 5A is an external perspective view of the rear seat for a vehicle, and FIG. 5B is a cross-sectional view taken along line CC or DD in FIG. 5A, and FIG. These are the EE sectional view taken on the line of Fig.5 (a), FIG.5 (d) is the F section enlarged view of FIG.5 (b). 6A is a perspective view showing the cushion frame and the back frame, and FIG. 6B is a view showing the plate member and the front edge frame as viewed from the direction A in FIG. 6A. 6 (c) is a view showing a means for attaching the plate member to the leading edge frame, and FIG. 6 (d) shows the plate member and the leading edge frame as viewed from the direction A in FIG. 6 (a). FIG. 7 is a view showing an angle different from that in FIG. 7A is a view showing a part of the seat cushion pad, FIG. 7B is a perspective view of the seat cushion pad as viewed from the front, and FIG. 7C is a seat cushion pad. It is the perspective view which looked at the pad from back, FIG.7 (d) is the figure which showed the relationship between a main pad part and a side part, FIG.7 (e) is the DD line | wire of Fig.7 (a) . It is sectional drawing, Comprising: It is a figure which shows the state before a main pad part is coat | covered with the covering member for seat cushions, FIG.7 (f) is sectional drawing of the DD line | wire of Fig.7 (a) , It is a figure which shows the state at the time of the main pad part being coat | covered with the covering member for seat cushions. FIG. 8A is an external perspective view of a vehicle rear seat, FIG. 8B is a view of the seat cushion portion viewed from below, and FIG. 8C is a view of FIG. 8A. It is AA sectional drawing. 9A is an external perspective view of the rear seat for a vehicle, and FIG. 9B is a cross-sectional view taken along line CC or DD in FIG. 9A, and FIG. These are the EE sectional view taken on the line of Fig.9 (a). FIG. 10A is an external perspective view of a vehicle rear seat, FIG. 10B is a cross-sectional view taken along line FF in FIG. 10A, and FIG. 10C is FIG. ) is a line G-G cross-sectional view of FIG. 10 (d) is H enlarged view of FIG. 10 (b), FIG. 10 (e) is a J enlarged view shown in FIG. 10 (c) . FIG. 11 is an enlarged view corresponding to the portion H in FIG. 10B and is a view for explaining another method of attaching the hook-and-loop fastener. FIG. 12 is a diagram illustrating an example in which a step is provided between the cushion frame and the rear seat support floor. FIG. 13A is a diagram for explaining a test method for a seat back load resistance test, and FIG. 13B is a diagram for explaining a test method for a moment strength test. FIG. 14A is a diagram showing the test results of the examples and comparative examples related to the seat back load resistance test, and FIG. 14B shows the test results of the examples and comparative examples related to the moment strength test. It is a figure.

  Hereinafter, the present invention will be described in more detail based on the embodiments shown in the drawings. 1 to 6 show an example in which the present invention is applied to a vehicle rear seat 1. The vehicle rear seat 1 includes a seat cushion portion 10 and a seat back portion 20. In the present embodiment, the seat cushion portion 10 includes two side seat portions 11 and 12 that are spaced apart from each other by a predetermined distance in the vehicle width direction, and a center seat portion 13 therebetween.

  The seat cushion portion 10 includes a cushion frame 100, a seat cushion pad 110, and a seat cushion covering member 120. The cushion frame 100 extends in the vehicle width direction and is disposed between the front edge frame 101 and the rear edge frame 102 disposed at a predetermined interval in the front-rear direction, and between corresponding ends of the front edge frame 101 and the rear edge frame 102. A pair of side frames 103 and 104 are provided. In addition, foam beads 103a and 104a are installed below the side frames 103 and 104 for height adjustment when the vehicle is installed on the vehicle floor and for filling a gap. Of course, when such height adjustment or the like is not necessary, the foam beads 103a and 104a need not be provided. The rear edge frame 102 is provided with body mounting brackets 105 protruding rearward at three positions with appropriate intervals, and the body mounting brackets 105 are fixedly arranged at predetermined positions on the body with bolts. The As described above, in the present embodiment, the cushion frame 100 of the seat cushion portion 10 includes the front edge frame 101 and the rear edge frame 102, and the side frames 103 and 104 are spanned therebetween.

  Therefore, when a large impact is applied to the front and rear, the impact is transmitted from the front edge frame 101 to the rear edge frame 102 via the side frames 103 and 104, and the cushion frame 100 and the back frame 200 are fixed to the body. The structure is transmitted to the body via the body mounting bracket 105. Therefore, compared with the conventional rear seat, even if a thin cushion cushion pad 110 is used, the impact energy is efficiently dispersed. Further, both the front edge frame 101 and the rear edge frame 102 are formed from a pipe material, and the pair of side frames 103 and 104 are also formed from a rod-shaped member having a predetermined thickness (thinned inside) or a pipe material. Has been. As shown in FIGS. 6B and 6C, the front edge frame 101 is welded to the hook 101a and fixed to the body (floor or the like). In the present embodiment, this is the case. Since the cushion frame 100 is made of a pipe material or the like and has a predetermined strength, it is sufficient that the hook 101a is provided at least at one place with respect to the front edge frame 101. In this respect, the configuration is simplified. The

  Four wires 106 are stretched between the front edge frame 101 and the rear edge frame 102 along the vehicle width direction substantially parallel to the side frames 103 and 104. Specifically, two wires 106 and 106 are disposed immediately inside the side frames 103 and 104, and the other two wires 106 and 106 are spaced apart from each other at approximately equal intervals in the vehicle width direction. The wires 106 and 106 are disposed, and the positions between the adjacent wires 106 and 106 correspond to the side sheet portions 11 and 12 and the center sheet portion 13 described above.

  A plate member 107 made of synthetic resin is disposed between the adjacent wires 106. The plate member 107 is formed in a substantially rectangular shape in plan view, the front edge portion 107a passes through the upper portion of the front edge frame 101 and protrudes forward, and the rear edge portion 107b is a rear edge portion of main pad portions 111 and 112 described later. It is formed in a size extending to a position corresponding to 1111, 1121, and is provided so that the rear edge 107b side is elastically biased upward. This is arranged so as to give a sense of stroke when seated on the side seat portions 11 and 12 and the center seat portion 13 and also to function as a vibration absorbing function. As a means for generating such an urging force, in this embodiment, as shown in FIG. 6, the front edge frame 101 is covered from below the front edge frame 101 toward the front edge portion 107 a of the plate member 107. The leaf spring 108 provided with the curved portion 108 a is brought into contact with each other to be coupled to each other, and the rear edge portion 107 b is urged upward by the elastic force of the leaf spring 108.

  The seat cushion pad 110 includes main pad portions 111 and 112 and a peripheral pad portion 113 formed of foamed urethane or the like. In the present embodiment, the main pad portions 111 and 112 are provided at positions spaced apart by a predetermined distance in the vehicle width direction, and constitute the two side seat portions 11 and 12 described above.

  The peripheral pad portion 113 has a shape that is substantially W-shaped as a whole in plan view. Specifically, side portions (outer side portions) 1131 and 1132 located outside the main pad portions 111 and 112 and wide side portions (wide portions) located between the main pad portions 111 and 112, respectively. Side portion) 1133 and a rear connecting portion 1134 that connects the other outer side portion 1132 from the outer side portion 1131 through the wide side portion 1133 and the other outer side portion 1132 integrally at the rear portion thereof. Is formed.

  The rear connecting portion 1134 has a width that is substantially the same as or narrower than the width of the main pad portions 111 and 112 and slightly extends forward, and a lower surface support portion 1134a that is positioned below the thickness direction cross section, and a lower surface support portion 1134a. It is formed in a shape having an upper edge portion 1134b that extends upward from the rear portion in the cross section in the thickness direction and further extends backward (see FIG. 7)). The upper edge portion 1134b covers the upper portion of the rear edge frame 102 of the cushion frame 100 (see FIG. 5B), and the outer side portions 1131 and 1132 are the side frames 103 and 104 of the cushion frame 100, respectively. It arrange | positions so that the upper part of may be coat | covered.

  The wide side portion 1133 is located between the main pad portions 111 and 112 and constitutes the center sheet portion 13. Since the center seat portion 13 is configured, this width is formed so that a person can be seated.

  The main pad portions 111 and 112 described above are disposed between one outer side portion 1131 and the wide side portion 1133 of the peripheral pad portion 113 and between the other outer side portion 1132 and the wide side portion 1133. The rear edge portions 1111 and 1121 of the pad portions 111 and 112 are provided so as to be positioned on the lower surface support portion 1134a of the peripheral pad portion 113 (see FIGS. 5B, 7E and 7F). In addition, each of the side portions of each main pad portion 111 and the outer side portions 1131 and 1132 and the wide side portion 1133 of the peripheral pad portion 113 adjacent thereto are located on the front side (FIGS. 7A and 7D). ) Are connected to each other (connecting portions A to D.) The main pad portions 111 and 112 and the peripheral pad portion 113 are integrally formed, and the main pad portions 111 and 112 are connected to each other. And the peripheral pad portion 113 are connected only at the connecting portions A to D described above, and the rear edge portions 1111 and 1121 of the main pad portions 111 and 112 are spaced upward from the lower surface support portion 1134a of the peripheral pad portion 113. (See FIG. 7 (e)).

  The main pad portions 111 and 112 further have a shape in which the front edge portions 1112 and 1122 protrude forward from the front edge frame 101 of the cushion frame 100 (see FIGS. 5B and 5C). Further, the front edge portions 1112 and 1122 are formed with cutout portions 1112a and 1122a extending in the width direction as viewed from the side in a cross-sectional shape along the width direction, and through the cutout portions 1112a and 1122a. The upper front edge portions 1112b and 1122b and the lower front edge portions 1112c and 1122c are formed in a shape. Therefore, when a person is seated and a load is applied to the thigh, the upper front edge portions 1112b and 1122b are displaced in a direction close to the lower front edge portions 1112c and 1122c, so that the upper front edge portions 1112b and 1122b are The elasticity which urges in the direction which returns to (2) acts. Thereby, it is possible to increase the feeling of stroke when the thighs are in contact with each other and to improve the vibration absorbing function. In other words, the structure that supports the back of the thigh by applying a predetermined elastic force can be carried out only by the structure of the pad 110 for the seat cushion without arranging a dedicated metal spring material or the like. Contributes to weight reduction.

  Since the plate member 107 is attached to the front edge frame 101 via the leaf spring 108 (see FIG. 6), the main pad portions 111 and 112 are arranged on the plate member 107. Become. Further, as shown in FIG. 5B, the rear edge portion 107 b of the plate member 107 is disposed so as to be positioned on the lower surface support portion 1134 a of the peripheral pad portion 113. Thereby, the elastic force of the leaf spring 108 also acts on the main pad portions 111 and 112. As a result of arranging the plate member 107 in this way, when the lower surface support portion 1134a is used as a support layer and the main pad portions 111 and 112 are used as flexible layers, the intermediate layer between the two is more relative to the main pad portions 111 and 112. Therefore, the plate member 107 is made of a hard synthetic resin, which is a hard material. For this reason, the contact side of the human buttocks muscle is supported by the main pad portions 111 and 112 having relatively soft spring characteristics, and the contact feeling at the time of sitting becomes soft, but the lower surface thereof is relatively linear. Since the highly rigid and relatively hard plate member 107 is located, it is not concentrated load and is excellent in body pressure dispersibility.

  Here, the wide side portion 1133 located between the main pad portions 111 and 112 is a part of the peripheral pad portion 113. Therefore, the rear edge is not biased upward. Therefore, in the present embodiment, a slit 1133d is provided in the vicinity of the rear edge portion, and the wide side portion 1133 is easily vibrated back and forth so that a higher vibration absorbing function is exhibited (FIG. 5 (c). ), See FIGS. 7A to 7C). Further, in order to further improve the feeling of stroke and vibration absorbing function when seated, the wide side portion 1133 also projects forward from the front edge frame 101 in the same manner as the main pads 111 and 112, and has a cross-sectional shape and a side surface. When viewed from above, a notch 1133a is formed along the width direction so that the interval increases toward the front, and the upper front edge 1133b and the lower front edge 1133c are formed through the notch 1133a. The thigh back is supported by applying a predetermined elastic force (see FIG. 5C).

  Further, as shown in FIG. 5 (c), the wide side portion 1133 has a cutout portion 1133 e shaped as if cut from the front at the lower portion of the rear edge portion. The rear edge portion 107b of the plate member 107 arranged at a corresponding position is inserted into the notch portion 1133e and supports the lower surface of the wide side portion 1133. Therefore, this part is also a combination of a flexible layer, a hard layer, and a support layer below the flexible layer, and in the center sheet portion 13, like the side seat portions 11 and 12 at positions corresponding to the main pad portions 111 and 112. In addition, it is possible to achieve a soft contact feeling when sitting and good body pressure dispersibility.

  The seat cushion covering member 120 covers the seat cushion pad 110, surrounds the cushion frame 100, and below the front edge frame 101, the rear edge frame 102, the side frames 103 and 104, and the foam beads 103a and 104a. It is arranged by being squeezed with a rope. As described above, the seat cushion pad 110 is in a state in which the rear edge portions 1111 and 1121 of the main pad portions 111 and 112 are spaced upward from the lower surface support portion 1134a of the peripheral pad portion 113 at the time of molding. (See FIG. 7 (e)). However, by covering with the seat cushion covering member 120, the rear edge portions 1111 and 1121 of the main pad portions 111 and 112 rotate around the connecting portions A to D, and come into contact with the lower surface support portions 1134a. (See FIG. 7F). As a result, the rear edge portions 1111 and 1121 of the main pad portions 111 and 112 are always urged upward in the direction centering on the connecting portions A to D, so that a predetermined elastic force acts. Will do. Thereby, even if a special metal spring member or the like is not used, or even if the thickness of the main pad portions 111 and 112 is relatively thin, a predetermined elasticity due to this upward restoring force is applied, A feeling of stroke, a vibration absorbing function, and the like can be further improved.

  Specifically, the seat cushion covering member 120 is made of a skin material such as synthetic leather, genuine leather, or fabric. As shown in FIG. 4, one outer side portion 1131 and one side portion of the peripheral pad portion 113 are used. The wire 106 positioned between the main pad portion 111, the wire 106 positioned between the one main pad portion 111 and the wide side portion 1133, and the wire 106 positioned between the wide side portion 1133 and the other main pad portion 112. The wire 106 positioned between the other main pad portion 112 and the other outer side portion 1132 is suspended via a hook member 106a made of synthetic resin. Then, the outer peripheral portion of the seat cushion covering member 120 covers the outer periphery of the peripheral pad portion 130 and the front surfaces of the main pad portions 111 and 112, is rotated below them, and is inserted into the folded portion of the outer peripheral portion 121. It arrange | positions by narrowing down the rope 122 (refer FIG. 8).

  In FIG. 4, the seat cushion covering member 120 is suspended on the wire 106 via the hook member 106 a, but corresponds to both side portions of the main pad portions 111 and 112 as shown in FIGS. 8 and 9. The lower surface covering portions 125 and 126 are connected to the upper surface boundary portions 123 and 124 of the seat cushion covering member 120 by sewing, and the lower surface covering portions 125 and 126 are connected through the gaps on the side portions of the main pad portions 111 and 112, respectively. Passing from the upper side to the lower side, it hangs around the wires 106 and 106 existing at the corresponding positions, and the edge of each of the lower surface covering portions 125 and 126 is attached to the lower surface of each main pad portion 111 and 112 with the surface fastener 127. It can also be set as the structure connected via.

  As shown in FIGS. 2 and 3, the seat back unit 20 includes a back frame 200, a seat back pad 210, and a seat back covering member 220. In the present embodiment, the back frame 200 is divided at a ratio of 6: 4 in the vehicle width direction, and both of the first outer frame frame 201 and the second outer frame frame are formed by processing a pipe material into a substantially square shape. 202. The first outer frame frame 201 has a width obtained by combining the one side seat portion 11 and the center seat portion 13 described above, and the second outer frame frame 202 has a width corresponding to the other side seat portion. Yes.

  Then, lower portions of both side frames 201a and 201b of the first outer frame frame 201 and lower portions of both side frames 202a and 202b of the second outer frame frame 202 respectively protrude backward from the rear edge frame 102 of the cushion frame 100. Bolts are connected in the middle of the two body mounting brackets 105.

  In the first outer frame frame 201, a position corresponding to the back of a person seated on one side seat portion 11 (particularly near the center of the back), the back of a person seated on the center seat portion 13 (particularly near the center of the back). The trunk support plates 203 and 204 are disposed along the vertical direction between the upper frame 201c and the lower frame 201d of the first outer frame frame 201, respectively, at positions corresponding to. In the second outer frame frame 202, between the upper frame 202c and the lower frame 202d of the second outer frame frame 202 at a position corresponding to the back of the person sitting on the other side seat portion 12 (particularly near the center of the back). A trunk support plate 205 is disposed along the vertical direction.

  The trunk support plates 203, 204, and 205 are formed in a shape in which a portion below the central portion in the vertical direction bulges in the front direction, and a midway portion above the bulge portions 203a, 204a, and 205a, In other words, the central portion in the vertical direction is a relatively weak portion, but the vicinity of the end connected to the outer frame frames 201 and 202 is not easily deformed. Therefore, the trunk support plates 203, 204, 205 support the person's back in a normal state, and when a large load is applied in a direction in which the person's back is pressed against the seat back part 20, the outer frame frames Since the vicinity of the ends connected to 201 and 202 is not easily deformed, the entire outer frame frames 201 and 202 are tilted backward so that the upper sides of the outer frame frames 201 and 202 are displaced rearward. That is, the outer frame frames 201 and 202 are inclined backward to absorb the shock while performing the function of supporting the trunk, and the first outer frame frame 201 and the second outer frame as in the prior art. Even if the entire surface of the frame 202 is not made into a panel shape, the load can be efficiently supported and the impact can be absorbed.

  The trunk support plates 203, 204, 205 are also formed in a substantially U-shaped (or hat-shaped) cross-sectional shape. For this reason, when the load applied from the rear, especially when the load in the luggage compartment moves forward due to a sudden brake, etc., and a load exceeding a predetermined value is applied, the open surface of the load is directed backward. (Refer to FIG. 3), the side part having a substantially U-shaped cross section is deformed to buckle. Therefore, impact energy can be absorbed by the deformation. Furthermore, if the impact energy is equal to or greater than a predetermined value, the vertical center of the trunk support plates 203, 204, 205 is a relatively weak portion, so that it deforms into a generally square shape and absorbs the impact. To do. Therefore, according to the back frame 200 of the present embodiment, it is possible to efficiently absorb the impact energy applied from either front or rear.

  The trunk support plates 203 and 204 of the first outer frame frame 201 are welded to the reinforcement frame 206 along the vehicle width direction at a substantially central portion in the vertical direction, specifically, slightly above the bulging portions 203a and 204a. Yes. As a result, even when impact energy is applied to a position deviated from the trunk support plates 203 and 204, the trunk support plates 203 and 204 and the first outer frame frame 201 are linked through the reinforcing frame 206. By the above-described action, any impact energy before and after can be reliably absorbed.

  The upper frame 201c of the first outer frame frame 201 has a position corresponding to the trunk support plates 203 and 204, and the upper frame 202c of the second outer frame frame 202 has a position corresponding to the trunk support plate 205, respectively. A headrest support 207 is provided, and the headrest frame 208 a of the headrest 208 is inserted and supported by the headrest support 207.

  The seat back pad 210 is formed by being integrally foamed with the back frame 200 described above. A seat back covering member 220 is disposed on the surface of the seat back pad 210. The seat back covering material 220 can be formed of the same material as the above-described seat cushion covering member 120. Further, in the present embodiment, the seat back pad 210 is divided into two pads 6: 4 in the vehicle width direction in accordance with the first outer frame frame 201 and the second outer frame frame 202 of the back frame 200, respectively. Similarly, the seat back covering material 220 is composed of two covering materials 221 and 222.

  More specifically, as shown in FIG. 10, the respective covering materials 221 and 222 are formed in a bag shape and are covered so as to surround the peripheral surfaces of the respective pad portions 211 and 212 (FIG. 10B). (See (c)). On the both sides of one covering material 221 corresponding to one side seat portion 11 and the outer side portion of the other covering material 222 corresponding to the other side seat portion 12, the longitudinal direction (up and down) of the seat back portion 20, respectively. A vertical concave portion 230 is formed as a shape accent for the design. The vertical concave portion 230 is first molded so that concave vertical grooves (vertical grooves) 211a and 212a are formed at corresponding positions in the seat back pads 211 and 212. At this time, the surface fasteners 213 are disposed in the longitudinal grooves 211a and 212a and are integrally molded. Then, the surface fasteners 223 are sewn in the vertical direction along corresponding positions in the respective covering materials 221 and 222, and the surface fasteners 223 are joined to the surface fasteners 213 disposed in the vertical grooves 211a and 212a. Thereby, each coating | covering material 221,222 is drawn in in the vertical grooves 211a and 212a, and the vertical direction recessed part 230 as a shape accent is formed (refer FIG.10 (d)).

  Each side seat portion 11 and 12 is similarly formed with a lateral concave portion 240 at a position corresponding to the vicinity of the chest of the seated person. Horizontal grooves (horizontal grooves) 211b and 212b are formed at corresponding positions, and surface fasteners 214 are molded and arranged integrally, and the surface fasteners 224 are sewn along the corresponding positions in the respective covering materials 221 and 222. The hook-and-loop fasteners 214 and 224 are joined to each other, and the covering members 221 and 222 are pulled in (see FIG. 10E). As described above, according to the present embodiment, the structure using the surface fasteners 213, 214, 223, and 224 is used to form the ohmic clip when forming the vertical concave portion 230 and the horizontal concave portion 240 as shape accents. It can be provided without using metal fittings, and can contribute to weight reduction and cost reduction.

  10D, the surface fasteners 213 are provided on the bottom surfaces of the vertical grooves 211a and 212a. However, as shown in FIG. 11, the surface fasteners 213A and 213A are provided on the side walls of the vertical grooves 211a and 212a. It is preferable to provide a configuration. In this case, the surface fasteners 223 on the side of the covering materials 221 and 222 and the surface fasteners 213A and 213A on the side walls are bonded to the force applied to the covering materials 221 and 222 in the direction away from the longitudinal grooves 211a and 212a. Since it counters with the shear force of a surface direction, both joining force acts strongly and it becomes difficult to detach | leave. Further, when the surface fastener 223 on the side of the covering material 221 and 222 and the surface fasteners 213A and 213A on the side wall surface act in the disengagement direction, the hook portions 213A1 and 213A1 formed on the surface fasteners 223, 213A and 213A, respectively. Or it is preferable to provide in the direction which becomes a direction where a loop part engages mutually. As a result, since the groove bottom surfaces of the vertical grooves 211a and 211a are closed, the engagement between them will not be released by shifting toward the groove bottom surface direction, so that the vertical grooves 211a and 211a will come out of the grooves. When the force is applied, the joining force of the hook-and-loop fastener functions in the shear direction, and the engagement state between the two is not easily released. In addition, it is the same that the side fasteners are preferably provided with surface fasteners in the lateral grooves 211b and 212b.

  Further, not only in the seat back portion 20, but also in the case where a concave portion as a shape accent is provided in the seat cushion portion 10, a groove is formed at an appropriate position of the seat cushion pad 110, and the seat cushion covering member 120 is provided. In the same manner as described above, it is preferable to carry out suspension through a hook-and-loop fastener. In this case, it is also preferable that a surface fastener is attached to the side wall surface of the groove so that the engaging force acts in the shear direction.

  According to the present embodiment, the main pad portions 111 and 112 of the seat cushion pad 110 constituting the seat cushion portion 10 are an integrally molded body that is biased upward with respect to the peripheral pad portion 113, and this is the seat cushion. In order to obtain desired cushion characteristics by covering with the covering material 120, a cushion material such as a thinner and lighter urethane material can be used. Moreover, the structure of the back frame 200 which comprises the seat back part 20 is also simple and lightweight, and the structure of the whole shape combining these all is simple and suitable for weight reduction.

  As shown in FIG. 12, a step is provided at the vehicle width direction end of the rear seat support floor portion of the vehicle, and at least one of the side frames 103, 104 is placed on the vehicle rear seat 1 on this step. By projecting so as to be positioned, it is possible to form the space below the projecting side frame as a space that can accommodate articles such as a bulk.

  Further, in the above-described embodiment, the present invention is applied to the vehicle rear seat 1, but the same technique as described above can also be applied to the front seat. However, the present invention is applicable to a rear seat in which the installation space is limited because it is lightweight and can be reduced in thickness, and can exhibit predetermined vibration absorption characteristics and shock absorption characteristics in a limited space. It is particularly preferable to do this.

(Test example)
(Seatback load resistance test)
Load resistance test for causing a load having a predetermined size and weight to collide with the first outer frame frame 201 and the second outer frame frame 202 in the vehicle rear seat 1 (example) described in the above embodiment from the rear under predetermined conditions. Went. Specifically, the center (HR-LH) of the headrest frame 208a disposed in each headrest support portion 207 of the first outer frame frame 201 corresponding to one side seat portion 11 shown in FIG. ,) The center (HR-CTR) of each headrest frame 208a disposed on the headrest support portion 207 of the first outer frame frame 201 corresponding to the center seat portion 13, the second outer corresponding to the other side seat portion 12. The measurement was performed by measuring the amount of displacement (front and back, up and down) before and after the collision of the center (HR-RH) of the headrest frame 208a disposed on the headrest support 207 of the frame frame 202. For comparison, a similar test was performed on a conventional rear seat using a panel frame in the seat back portion. The result is shown in FIG.

  As shown in FIG. 14A, the displacement amount of the embodiment is smaller than that of the comparative example in both the front-rear direction and the up-down direction, and is superior in the function of absorbing impact energy against the impact caused by the load from the rear.

(Moment strength test)
As shown in FIG. 13B, a moment strength test was performed by applying a load from the front to the rear at the highest portion in the vicinity of the substantially central portion of the upper frame 201c of the first outer frame frame 201. The result is shown in FIG.
As shown in FIG. 14B, it can be seen that the displacement amount at the specified moment is smaller in the example than in the comparative example, and the absorption function for the impact energy applied from the front is also superior.

DESCRIPTION OF SYMBOLS 1 Vehicle rear seat 10 Seat cushion part 11,12 Side seat part 13 Center seat part 100 Cushion frame 101 Front edge frame 102 Rear edge frame 103,104 Side frame 106 Wire 107 Plate member 110 Seat cushion pad 111,112 Main pad part 113 Peripheral pad portion 120 Seat cushion covering member 20 Seat back portion 200 Back frame 201 First outer frame frame 202 Second outer frame frame 203, 204, 205 Trunk support plate 220 Seat back covering member

Claims (19)

In a vehicle seat having a seat cushion portion and a seat back portion,
The seat cushion portion is
A cushion frame comprising a front edge frame and a rear edge frame disposed at a predetermined interval in the front-rear direction, and a pair of side frames disposed between corresponding ends of the front edge frame and the rear edge frame; ,
A main pad portion that covers the front edge frame from above and extends to a position that supports a seated person's buttocks, and surrounds a side portion and a rear edge portion of the main pad portion, and a lower surface of the rear edge portion of the main pad portion And a peripheral pad portion formed in a shape having a lower surface support portion extending to a position for supporting the main pad portion, and a portion of the main pad portion and the adjacent side portions of the peripheral pad portion that are closer to the front are connected. A seat cushion pad formed by molding the rear edge portion of the main pad portion upwardly away from the lower surface support portion of the peripheral pad portion;
The seat cushion pad is covered and disposed so that the rear edge of the main pad portion is pressed against the lower surface support portion of the peripheral pad portion, thereby urging the rear edge side of the main pad portion upward. A vehicular seat comprising a seat cushion covering member for imparting elasticity. When the seat cushion pad has a lower layer support portion of the peripheral pad portion supporting the lower surface of the rear edge portion of the main pad portion as a support layer and the main pad portion is a flexible layer, The vehicle seat according to claim 1, wherein the vehicle seat has a three-layer structure in which an intermediate layer made of a material relatively harder than the main pad portion is disposed between a lower surface support portion and the main pad portion. 3. The vehicle according to claim 2 , wherein the intermediate layer is a member whose front edge portion is supported by the front edge frame and whose rear edge portion is located between the lower surface support portion of the peripheral pad portion and the main pad portion. Sheet. The vehicle seat according to claim 3, wherein the intermediate layer is a member provided so that the rear edge side is elastically biased upward.   The said intermediate | middle layer is comprised from the plate member by which the front edge part is supported by the said front edge frame via a leaf | plate spring, and the said rear edge part side is urged | biased upwards with the elastic force of this leaf | plate spring. Vehicle seats.   The vehicle seat according to any one of claims 1 to 5, wherein the seat cushion portion includes two side seat portions, and the main pad portion is provided at a position corresponding to each of the side seat portions. Sheet. The seat cushion portion has a center seat portion having a predetermined width between the side seat portions .
The peripheral pad portion is provided at a position corresponding to the outer side portion of each side seat portion, the wide side portion located between the side seat portions, and the rear edge portion of each side seat portion. The lower surface support portion is formed,
The vehicle seat according to claim 6, wherein a wide side portion of the peripheral pad portion corresponds to the center seat portion. The main pad portion constituting the side seat portion has a shape in which a front edge portion protrudes forward from the front edge frame of the cushion frame, and the front edge portion has a cross-sectional shape with a gap toward the front. A widening notch is formed in the width direction, and is formed in a shape including an upper front edge and a lower front edge via the notch, and the upper front edge is defined as the lower front edge. The vehicle seat according to claim 6 or 7 , wherein an elastic force is applied to urge the upper front edge portion in a return direction by applying a load in a direction close to the portion.   The wide side portion of the peripheral pad portion constituting the center seat portion has a shape in which a front edge portion projects forward from a front edge frame of the cushion frame, and the front edge portion has a cross-sectional shape. And a notch that extends in the width direction is formed in the width direction, and is formed in a shape including an upper front edge and a lower front edge through the notch, and the upper front edge is The vehicle seat according to claim 7, wherein a load in a direction approaching the lower front edge portion is applied, whereby elasticity that urges the upper front edge portion in a return direction acts. In the cushion frame, a wire is stretched between the front edge frame and the rear edge frame at positions corresponding to both side portions of the main pad portion of the side seat portion constituting the seat cushion pad, and the wire is used. The vehicle seat according to any one of claims 6 to 9, wherein the covering member for seat cushion is attached. The seat back portion is
A back frame connected to the cushion frame via a bracket;
The back frame includes an outer frame frame formed in a substantially rectangular shape, and a trunk support plate that is disposed along the vertical direction in the outer frame frame and supports the back of the seated person. The vehicle seat according to any one of claims 1 to 10. The seat back portion includes a back frame connected to the cushion frame via a bracket, and the back frame is formed in an outer frame frame formed in a substantially rectangular shape, and along the vertical direction in the outer frame frame. And a trunk support plate configured to support the back of the seated person,
The outer frame frame constituting the back frame has a first outer frame frame formed in a substantially rectangular shape so as to have a width obtained by combining one of the side seat portion and the center seat portion, and the other side. A second outer frame frame formed in a substantially rectangular shape so as to have a width corresponding to the seat portion,
In the first outer frame frame, two trunk support plates are provided at a predetermined interval corresponding to each of the one side seat portion and the center seat portion,
The vehicle seat according to claim 7 or 9, wherein the trunk support plate is provided in the second outer frame frame so as to correspond to the other side seat portion.   The vehicle seat according to claim 11 or 12, wherein the trunk support plate is configured to be deformed into a substantially square shape centering on a middle portion in the vertical direction when a predetermined load or more is applied.   The vehicle seat according to any one of claims 11 to 13, wherein the trunk support plate has a substantially U-shaped cross section. At an appropriate position of the seat cushion pad is supported by the cushion frame of the seat back pad or the seat cushion is supported by the back frame definitive to the seat back portion, and a groove is formed,
A shape accent for design is formed by the seat back covering member covering the seat back pad or the seat cushion covering member covering the seat cushion pad being suspended in the groove through the surface fastener. The vehicle seat according to any one of claims 11 to 14.   One surface fastener is attached to the side wall surface of the groove, and the other surface fastener is attached to the seat back covering member or the seat cushion covering member, and the other surface fastener is placed in the groove. If the hooks and loops of the hook-and-loop fasteners are engaged, the hook-and-loop fasteners of the hook-and-loop fasteners are engaged with each other. The vehicle seat according to claim 15, which is attached.   The vehicle seat according to any one of claims 1 to 16, which is used as a rear seat. 18. A vehicle seat according to claim 17 , wherein a cushion frame is fixed to the rear seat support floor portion on a rear seat support floor portion provided with a step on the rear side of the vehicle. Vehicle.   In the rear seat support floor portion, at least one side frame of the cushion frame protrudes outward along the vehicle width direction of the rear seat support floor portion, and an article is accommodated below the protruding at least one side frame. The vehicle according to claim 18, wherein a possible space is formed.

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