JP2014136472A - Vehicle seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a planar body in a stretched manner on a seat frame so as to support weight of a seating person preferably.SOLUTION: A vehicle seat 1 comprises: a frame-shaped cushion frame 3F; and a flexible cloth spring 12 (a planar body) provided in a frame of the cushion frame 3F in a stretched manner for supporting weight of a seating person on its surface. The cloth spring 12 is linked between both frames of the cushion frame 3F, and has a body surface part 12A for covering inside of the frame of the cushion frame 3F, and an extended surface part 12B which is extended so as to catch a front panel 3F2 which is linked between front ends of both side frames 3F1. The extended surface part 12B also supports weight of a seating person.

Description

  The present invention relates to a vehicle seat. More specifically, the present invention relates to a vehicle seat having a frame-shaped seat frame and a flexible planar body that is stretched within the frame of the seat frame and supports a load of a seated occupant.

  2. Description of the Related Art Conventionally, a vehicular seat is known in which a seat pad is supported by a planar body stretched in a seat frame (Patent Document 1). Specifically, the cushion pad of the seat cushion is configured to be surface-supported from below by a planar body stretched in the frame of the cushion frame. Specifically, the above-described planar body is stretched in a support wire previously assembled in a frame shape, and is stretched in the cushion frame by assembling the support wire to the cushion frame. . With the above arrangement, the planar body is positioned between the front panel and the rear frame of the cushion frame, and together with these, the cushion pad is configured to support the surface from below.

JP2011-254952A

  However, in the above prior art, the space between the planar body and the front panel is vacant, and the cushion pad is not sufficiently supported. The present invention was devised as a solution to the above-mentioned problem, and the problem to be solved by the present invention is to stretch a planar body on a seat frame so that the load of a seated occupant can be satisfactorily supported. There is to do.

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 having a frame-shaped seat frame and a flexible planar body that is stretched within the frame of the seat frame and supports a load of a seated occupant on the surface. The planar body is bridged between both frames of the seat frame, and the bridge frame is bridged between the main body surface portion covering the inside of the frame of the seat frame and the end portion on the side far from the hip point of the seated occupant in both side frames. And an extended surface portion extended so as to be applied to the seat, and the extended surface portion also supports the load of the seated occupant.

  Here, "the side far from the hip point of both side frames" specifically refers to the upper side far from the hip point of both side frames in the seat back and the front side far from the hip point of both side frames in the seat cushion. It is done.

  According to the first aspect of the invention, the planar body is stretched so as to cover not only the frame of the seat frame but also the bridging frame that is bridged between the end portions on the side far from the hip points of both side frames. State. Thereby, the load of the seated occupant can be widely supported by the surface by the planar body.

  According to a second aspect of the present invention, in the first aspect described above, the structure further includes a cushion material that is provided in a state of being supported from the back side by the planar body and the seat frame, and softly receives the load of the seated occupant. Has been. The cushion material has a configuration in which a convex portion for increasing a pressing force against the extension surface portion is formed to protrude from a portion supported by the extension surface portion of the planar body hung on the bridge frame.

  According to the second aspect, since the convex portion is formed in the portion supported by the extended surface portion of the cushion material, the support force of the cushion material can be increased in this portion. In addition, this makes it possible to widely disperse the seat occupant's body pressure applied to the cushion material in the convex portion formation portion without concentrating on the portion where the body pressure such as the waist and the buttocks is strongly applied.

  The third invention is the following configuration in the first or second invention described above. The bridge frame is a plate-like front panel that is bridged between the front end portions of both side frames of the seat cushion. The front panel has a shape having a top plate portion that faces the upper side of the seat and an inclined portion that extends from the rear edge portion of the top plate portion so as to incline in the lower rear direction of the seat. The planar body is provided in a state in which the extended surface portion is hung on the inclined portion described above from the upper side of the seat, and the front edge portion of the extended surface portion is hooked on the inclined portion.

  According to the third aspect of the invention, the planar body is provided so as to hang on the inclined portion of the front panel that lifts and supports the thigh of the seated occupant so as to be lifted forward. The transition from the support of the material to the support of the cushion material by the front panel is performed at the inclined portion. Therefore, the step of the supporting force generated at the boundary between the planar body and the front panel can be effectively relaxed, and the load of the seated occupant can be supported in a better shape by the planar body.

  According to a fourth invention, in any one of the first to third inventions described above, the planar body is stretched over the frame body, and the planar body is attached to the seat frame, whereby the planar body is the frame body. It is made into the state bridge | crosslinked between the frames of the seat frame via.

  According to the fourth aspect of the invention, since the planar body is attached to the seat frame via a frame body that is simpler than the seat frame, the planar body can be easily constructed with respect to the stretched symmetrical object. Since it can be stretched and the frame body is easily attached to the seat frame, the planar body can be appropriately bridged between the frames of the seat frame. .

1 is a perspective view showing a schematic configuration of a vehicle seat of Example 1. FIG. It is a disassembled perspective view of a seat cushion. It is a top view of a cushion frame. It is the side view of the cushion frame which emphasized and showed the support body. It is the VV sectional view taken on the line of FIG. It is the VI-VI sectional view taken on the line of FIG. It is the VII-VII sectional view taken on the line of FIG. 5 is a perspective view showing a schematic configuration of a vehicle seat of Example 2. FIG. It is a disassembled perspective view of a seat back.

  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 according to the present embodiment is configured as a driver's seat of an automobile, and includes a seat back 2 that serves as a backrest portion for a seated occupant and a seat cushion 3 that serves as a seating portion. Yes. The seat cushion 3 is installed on the floor of the vehicle via a pair of left and right slide rails 5, and is provided so that the installation position in the seat front-rear direction relative to the floor can be adjusted by the slide rails 5. It is in a state. In addition, the seat cushion 3 is provided with a lifter mechanism 4 including a pair of left and right four-bar linkage mechanisms between the above-described slide rails 5. Further, the configuration can be adjusted.

  The seat back 2 is connected to the rear end portion of the seat cushion 3 via a recliner (not shown), and the standing angle (backrest angle) with respect to the seat cushion 3 is adjusted in the longitudinal direction of the seat by the operation of the recliner. It is in a state provided so that Note that the configurations of the slide rails 5, the lifter mechanism 4, and the recliner (not shown) described above are publicly disclosed in documents such as JP 2010-221935 A, JP 2009-166808 A, and JP 2010-221935 A. Since the configuration is the same as that of the above, description of these specific configurations will be omitted.

  As shown in FIG. 2, the seat cushion 3 described above includes a frame-like cushion frame 3 </ b> F that forms an inner skeleton thereof, a support body 10 that has a cloth spring 12 stretched in the frame of the cushion frame 3 </ b> F, and these supports. A cushion pad 3P that softly receives the load of the seated occupant as supported by the body 10 and the cushion frame 3F from the lower side (back side), and a cloth cushion cover 3C that covers the entire surface of the cushion pad 3P (see FIG. 1) And is configured. The cushion frame 3F corresponds to the “seat frame” of the present invention, the cloth spring 12 corresponds to the “planar body” of the present invention, and the cushion pad 3P corresponds to the “cushion material” of the present invention.

  The cushion frame 3F described above is configured by being assembled into a square frame-like skeleton shape along the outer peripheral shape of the seat cushion 3. Specifically, the cushion frame 3F is made of a steel plate that is integrally bridged between a side frame 3F1 made of a steel plate material that is long in the front-rear direction of the pair of left and right seats, and a front end portion of the side frame 3F1. The front panel 3F2 and a rear pipe 3F3 made of a circular steel pipe that is cross-linked so as to be rotatably pivoted between the rear portions of both side frames 3F1. Here, each side frame 3F1 described above corresponds to a “side frame” of the present invention, and the front panel 3F2 corresponds to a “bridge frame” of the present invention. The above-described rear pipe 3F3 is configured as a connecting rod for integrally connecting the connecting shafts of the rear side link and the side frames 3F1 constituting the above-described lifter mechanism 4, and for this reason, between the connecting shafts. As a state of being cross-linked to each other, the state is provided in a state where it is pivotally mounted between the rear portions of the side frames 3F1.

  Each side frame 3F1 has a configuration in which the upper edge portion and the lower edge portion thereof are bent inward of the seat, and the structure strength against bending and twisting is increased. The front panel 3F2 has a state in which the shape is assigned to the upper surface portion and the front surface portion so as to connect the front end portions of the side frames 3F1 described above and is integrally coupled by spot welding. (Spot welds We1, We2). Specifically, the above-described front panel 3F2 includes a front plate portion 3F2a having a surface facing the front side of the seat, a top plate portion 3F2b having a surface facing the upper side of the seat, and a rear edge portion of the top plate portion 3F2b from the rear edge of the seat. And an inclined portion 3F2c extending in an inclined manner.

  The front plate portion 3F2a is formed such that the left and right edges thereof are curved toward the rear side of the seat following the shape of the front portion of the seat cushion 3, and the curved front edges are the sides. It is applied to the front surface of the frame 3F1 and is integrally connected by spot welding (spot welded portion We1). The top plate portion 3F2b is placed in a state where the left and right side edges are placed and placed on the upper surface portion of each side frame 3F1, and the two front and rear portions thereof are integrated with the upper surface portion by spot welding. It is set as the connected state (spot weld part We2). The inclined portion 3F2c is positioned between the above-described side frames 3F1, and is in a state in which an inclined surface extending obliquely straight from the rear edge portion of the above-described top plate portion 3F2b to the lower rear side of the seat is formed.

  In the front panel 3F2 described above, the front plate portion 3F2a that faces the front side of the seat described above forms a front skeleton of the seat cushion 3. Further, the front panel 3F2 has a top plate portion 3F2b whose surface is directed to the upper side of the seat to form a top skeleton of a front end region of the seat cushion 3 that supports the vicinity of the front end of the thigh of the seated occupant. In addition, the front panel 3F2 includes a seat cushion 3 that is supported by an inclined portion 3F2c extending from the rear edge portion of the top plate portion 3F2b so as to be inclined rearward and downward to lift the thigh of the seated occupant upward. The upper surface skeleton of the central region is formed. In the inclined portion 3F2c described above, hook portions 3F2c1 that can be hooked by hooking a front frame portion 11A of the support wire 11 to be described later from the front side of the seat are formed side by side in four places in the seat width direction. ing. Each of the hook portions 3F2c1 is formed as a cut-and-raised portion in which a part of the inclined portion 3F2c is cut and raised to an oblique angle from the front side of the seat to the upper side.

  The support 10 includes a support wire 11 assembled in a square frame shape and a cloth spring 12 stretched in the frame of the support wire 11. Here, the support wire 11 corresponds to the “frame” of the present invention. The support wire 11 described above is formed by bending a single steel wire into a square frame shape, and the ends of the wire are welded at the center of the front frame portion 11A assembled in the square frame shape. By connecting them endlessly, the structural strength against bending and twisting is increased. The support wire 11 described above is hooked in the frame of the cushion frame 3F as follows. First, the front frame portion 11A of the support wire 11 is hooked and hooked from the front side of the seat to each hook portion 3F2c1 formed on the inclined portion 3F2c of the front panel 3F2. Next, the rear frame portion 11C of the support wire 11 is elastically hooked while being pushed into the rear pipe 3F3 of the cushion frame 3F from the upper side of the seat and bent. As a result, the support wire 11 is in a state where the front frame portion 11A and the rear frame portion 11C are hooked on the front panel 3F2 and the rear pipe 3F3 of the cushion frame 3F, respectively, and are bridged between them. It becomes.

  Here, the rear frame portion 11C of the support wire 11 described above is formed in a shape in which the rear end portion of each horizontal frame portion 11B is bent in a hook shape on the lower side of the seat. Thus, it is formed in a shape that can be hooked from the upper side of the seat. Therefore, after hooking the above-described front frame portion 11A to each hook portion 3F2c1 of the front panel 3F2, the rear frame portion 11C is elastically hooked while being pushed into the rear pipe 3F3 from the upper side of the seat and bent. As a result, the front frame portion 11A and the rear frame portion 11C are bridged into a state in which they are strongly stretched between the front panel 3F2 and the rear pipe 3F3.

  The hooks 11E provided so as to extend from the central part of the horizontal frame parts 11B to the outer side of the support wire 11 together with the hooks described above are connected to the side frames 3F1 of the cushion frame 3F. (See FIGS. 3 to 4). As a result, as shown in FIG. 3, the support wire 11 is also bridged between the side frames 3F1 of the cushion frame 3F, and is supported by the front, rear, left and right portions of the cushion frame 3F. It will be in the state assembled | attached within the frame of the cushion frame 3F.

  Here, as shown in FIG. 7, each hook part 11E provided in each horizontal frame part 11B mentioned above has the part applied to the lower surface part of each horizontal frame part 11B of each horizontal frame part 11B. It is formed in a shape that is bent into a hook shape so as to be hung on the lower surface portion, and is welded to the lower surface portion of each horizontal frame portion 11B. Thereby, each hook part 11E is made into the state couple | bonded firmly with respect to each horizontal frame part 11B so that the load of the gravitational direction concerning each horizontal frame part 11B may be supported strongly. And each hook part 11E is made into the shape extended diagonally from the welding part with each horizontal frame part 11B mentioned above to the sheet | seat outer upper direction, and also in the middle of being bent in the mountain shape of the extended tip. Each flat portion is configured to be hooked and hooked so as to come into surface contact with the upper surface of each side frame 3F1. By the above hooking, the hook portions 11E are hooked so as not to be displaced in the seat width direction with respect to the side frames 3F1 by the portions bent in a mountain shape extending over the upper portions of the side frames 3F1. It is assumed that

  As shown in FIGS. 2 and 4, the support wire 11 described above is configured such that the front portion and the center portion of each horizontal frame portion 11 </ b> B serve as a first bent portion 11 </ b> B <b> 1 and a second bent portion 11 </ b> B <b> 2, respectively. A configuration in which the rear portion of each horizontal frame portion 11B is bent into a shape bent inward in the sheet width direction as a third bent portion 11B3. It is said that. Specifically, the first bent portion 11B1 is formed in a shape in which each horizontal frame portion 11B is bent in a mountain shape, and the second bent portion 11B2 is formed in a shape in which each horizontal frame portion 11B is bent in a valley shape. ing. As a result, the support wire 11 has a configuration in which a later-described cloth spring 12 stretched in the frame is stretched in a folded shape in a mountain shape or a valley shape at each folded position. It has become.

  Therefore, although details will be described later, the cloth spring 12 stretched in the frame of the support wire 11 is projected in a mountain shape by the first bent portion 11B1 of the support wire 11 as shown in FIG. By the stretched front part, the front part 3Pa of the cushion pad 3P that supports the thigh of the seated occupant can be supported in a state where the front part 3Pa is lifted up strongly. The cloth spring 12 swells to the lower side of the cushion pad 3P that supports the buttocks of the seated occupant by an intermediate portion that is stretched in a valley shape by the second bent portion 11B2 of the support wire 11. The butt support portion 3Pb is widely received so that it can be supported. The third bent portion 11B3 functions together with the above-described first bent portion 11B1 to regulate the positional deviation of the cloth spring 12 (coating portion 11D) with respect to the support wire 11, but details will be described later. And

  Subsequently, as shown in FIG. 2, the cloth spring 12 is formed of a single cloth material having an extensibility having a high tensile strength capable of receiving the load of the seated occupant. The cloth spring 12 is set in such a manner that the left and right edges thereof are pulled into the horizontal frame portions 11B of the support wire 11 described above, and these mating portions are made of a resin material (thermoplastic resin (polypropylene). , Vinyl chloride resin, polyethylene) and thermosetting resins (resin materials such as phenolic resin, melamine resin, epoxy resin, urea resin)) are integrally bonded to each other by a film portion 11D formed by insert molding. Thus, a state of being stretched as a state of being spanned between the respective horizontal frame portions 11B.

  The above-described cloth spring 12 covers the above-described support wire 11 widely in the front-rear direction of the seat from the region on the front side from the formation position of the first bending portion 11B1 to the region on the rear side from the formation position of the third bending portion 11B3. It is stretched as an attached state. And each coating | coated part 11D which fixes each edge part of the right and left both sides of the said cloth spring 12 to each horizontal frame part 11B of the support wire 11 mentioned above is the formation location of 2nd bending part 11B2 of each edge part of the cloth spring 12 In order to connect the entire area to the horizontal frame part 11B, the front part and the rear part are separated and formed in a long shape. Thereby, each said film part 11D is made into the state formed ranging over 1st bending part 11B1 and 3rd bending part 11B3 formed in each horizontal frame part 11B of the support wire 11 mentioned above, These Due to the restriction by the bent shape, each of the lateral frame portions 11B is formed in a state of being firmly and integrally coupled so as not to be displaced in the longitudinal direction or the rotational direction.

  The cloth spring 12 described above is configured as a free end in each of the formation positions of the above-described second bent portions 11B2, and each edge portion is not coupled to each horizontal frame portion 11B. As described above, when receiving the load on the buttocks of the seated occupant on the buttocks support portion 3Pb of the cushion pad 3P, it is easier to stretch and deform than other portions. Thereby, the cloth spring 12 is configured to receive the load received from the buttocks support portion 3Pb of the cushion pad 3P to the other surface portion so that the body pressure is widely dispersed and received.

  The cloth spring 12 described above is formed of a single cloth material as shown in FIG. 3, and the main body surface portion 12A that covers the in-frame region of the cushion frame 3F by the stretched region, and the front panel And an extended surface portion 12B hanging on top of 3F2. The main body surface portion 12A is formed as a surface portion that occupies the most area of the cloth spring 12 and is stretched so as to cover a wide area in the front-rear direction of the seat between the front panel 3F2 and the rear pipe 3F3 of the cushion frame 3F. Yes. The extension surface portion 12B is formed as a surface portion that occupies the region of the front edge portion of the cloth spring 12, and is stretched so as to be hung on the upper portion of the inclined portion 3F2c that extends and inclines in the lower rearward direction of the front panel 3F2. It is said that it was in the state.

  Specifically, as shown in FIG. 5, the inclined portion 3F2c described above is formed so as to incline and extend rearward and downward, whereas the extended surface portion 12B extends from the first bent portion 11B1 to the lower front of the seat. It extends so as to be inclined in the direction, and is stretched from the inclined portion 3F2c to a position floating above the seat. Further, as shown in FIG. 3, the inclined portion 3F2c described above is formed in a shape in which the rear edge portion extends in an arc shape toward the rear side of the seat from the central portion in the seat width direction toward the left and right edge portions. Has been. In contrast to the inclined portion 3F2c having a curved rear edge, the extended surface portion 12B described above has a configuration in which the front edge extends straight in the sheet width direction. The inclined portion 3F2c is stretched so as to be relatively shallow at the central portion in the sheet width direction, and to be gradually deepened from there to the left and right sides.

  Next, the configuration of the cushion pad 3P will be described with reference to FIG. The cushion pad 3P is formed by foaming a flexible polyurethane foam material. The cushion pad 3P is assembled to the upper part of the above-described cushion frame 3F, so that each frame part (each side frame 3F1, front panel 3F2, rear pipe 3F3) of the cushion frame 3F and the above-described support body 10 from the lower side. It is designed to be widely supported on the surface. Specifically, the cushion pad 3P is in a state of being firmly supported from the lower side by the outer peripheral portion supported by each frame portion of the cushion frame 3F described above, and by the cloth spring 12 of the support body 10 described above. In the supported center part, it is made into the state elastically softly supported from the lower side by the tension | tensile_strength of the cloth spring 12. FIG.

  Specifically, the cushion pad 3P described above is assembled and set so as to cover each frame portion (each side frame 3F1, front panel 3F2, rear pipe 3F3) of the cushion frame 3F from the outer periphery side of the seat. . Then, after the cushion pad 3P is assembled to the upper part of the cushion frame 3F, the cushion cover 3C is covered so that the entire surface (the seating surface and the front, back, left, and right side surfaces) is covered. When each peripheral edge portion is pulled and fixed to the bottom of the cushion frame 3F, the tension of the cushion cover 3C causes the frame portions (the side frames 3F1, the front panel 3F2, the rear pipe 3F3) of the cushion frame 3F. Each of them is strongly pressed and assembled and held in close contact.

  Specifically, as shown in FIG. 5, the cushion pad 3P described above is assembled and supported so that the front portion 3Pa covers the front panel 3F2 of the cushion frame 3F described above from the front side and the upper side, respectively. The rear portion 3Pc is assembled and supported so as to cover the rear pipe 3F3 of the cushion frame 3F from the rear side and the upper side. By the above assembly, the cushion pad 3P is configured such that the center butt support portion 3Pb that receives strong body pressure from the buttocks of the seated occupant is appropriately softly received from the lower side by the cloth spring 12 of the support 10 described above. However, the outer peripheral portion is held in a state of being strongly and stably supported from the lower side by the frame portions (the side frames 3F1, the front panel 3F2, and the rear pipe 3F3) of the cushion frame 3F described above. .

  Here, on the front side surface portion of the cushion pad 3P described above, a part of the cushion cover 3C (see FIG. 1) to be covered so as to cover the entire surface can be suspended and fixed inside. A recessed groove 3P1 is formed. Further, on the back side surface portion (bottom surface portion) of the cushion pad 3P, a shelf-like shape is formed on the lower side of the seat on a portion that hangs on the inclined portion 3F2c of the front panel 3F2 that lifts and supports the thigh of the seated occupant. A convex portion 3P2 having a bulging shape is formed. The convex portion 3P2 is formed widely over most of the region in the seat width direction on the inclined portion 3F2c of the cushion pad 3P, and when the load of the seated occupant is applied to the cushion pad 3P, Prior to this part, it is pressed and supported downward. By forming the convex portion 3P2, the body pressure of the seated occupant can be received by being widely dispersed in the formation portion of the convex portion 3P2 without concentrating on the buttocks support portion 3Pb of the cushion pad 3P that supports the buttocks. Yes.

  The protrusion 3P2 described above is provided with the extended surface portion 12B extended so that the cloth spring 12 of the support 10 described above is hooked on the inclined portion 3F2c of the front panel 3F2. It is in a state of being provided so as to be supported from below by the extended surface portion 12B, not by 3F2. Accordingly, the convex portion 3P2 that receives the above-described strong crushing force and is pressed downward is supported by the soft cloth spring 12 as compared with the front panel 3F2, so that the abrasion of the convex portion 3P2 can be reduced. it can.

  As described above, the seat 1 according to the present embodiment includes the frame-shaped cushion frame 3F and the flexible cloth spring 12 that is stretched within the frame of the cushion frame 3F and supports the load of the seated occupant on the surface. The cloth spring 12 is bridged between the side frames 3F1 of the cushion frame 3F, and the body surface portion 12A that covers the inside of the cushion frame 3F and the side far from the hip point HP of the side frames 3F1. And an extended surface portion 12B extended so as to be hooked on the front panel 3F2 bridged between the end portions of the two, and the extended surface portion 12B also supports the load of the seated occupant.

  With this configuration, the cloth spring 12 is stretched so as to cover not only the frame of the cushion frame 3F but also the front panel 3F2 bridged between the ends of the side frames 3F1 on the side far from the hip point HP. It is said. Thereby, the load of the seated occupant can be widely supported by the surface by the cloth spring 12.

  Further, the cushion pad 3P has a configuration in which a convex portion 3P2 for increasing the pressing force against the extension surface portion 12B is formed to protrude from a portion supported by the extension surface portion 12B of the cloth spring 12 hung on the front panel 3F2. . Thus, the convex part 3P2 is formed in the part supported by the said extension surface part 12B of the cushion pad 3P, Therefore The support force of the cushion pad 3P can be heightened in this part. This also allows the body pressure of the seated occupant to be applied to the cushion pad 3P to be widely dispersed in the portion where the convex portion 3P2 is formed without concentrating on the portion where the body pressure such as the buttocks is strongly applied.

  Further, the front panel 3F2 has a shape having a top plate portion 3F2b facing the upper side of the seat, and an inclined portion 3F2c extending inclined from the rear edge portion of the top plate portion 3F2b to the seat rear lower direction. The cloth spring 12 is provided in a state in which the extended surface portion 12B is hooked on the inclined portion 3F2c described above from the upper side of the seat, and the front edge portion of the extended surface portion 12B is hooked and hooked on the inclined portion 3F2c. ing. Further, since the cloth spring 12 is provided so as to be hooked on the front panel 3F2 that supports the vicinity of the thigh of the seated occupant, the support of the cushion pad 3P by the cloth spring 12 is changed to the support of the cushion pad 3P by the front panel 3F2. Will be performed in the overlapping part. Therefore, the step of the supporting force generated at the boundary between the cloth spring 12 and the front panel 3F2 can be effectively relaxed, and the load of the seated occupant can be supported by the cloth spring 12 in a better form.

  In particular, since the cloth spring 12 is provided so as to be hooked on the inclined portion 3F2c of the front panel 3F2 that lifts and supports the thigh of the seated occupant, the cushion spring 3P is supported by the cloth spring 12. Transition to support of the cushion pad 3P by the front panel 3F2 is performed at the inclined portion 3F2c. Therefore, the step of the supporting force generated at the boundary between the cloth spring 12 and the front panel 3F2 can be effectively relaxed, and the load of the seated occupant can be supported by the cloth spring 12 in a better form.

  Then, the structure of the sheet | seat 1 of Example 2 is demonstrated using FIGS. 8-9. In addition, in a present Example, about the location which becomes substantially the same structure and effect | action as the sheet | seat 1 shown in Example 1, the same code | symbol is attached | subjected and description is abbreviate | omitted, and a different location is demonstrated in detail. I will do it. In this embodiment, a flexible cloth spring 22 that supports the seat occupant's load on the surface is set on the seat back 2.

  The seat back 2 described above includes a frame-shaped back frame 2F that forms an internal skeleton thereof, a support body 20 having a cloth spring 22 stretched within the frame of the back frame 2F, and the support body 20 and the back frame 2F. The back pad 2P that softly receives the load of the seated occupant as supported by the rear side (back side), and the cloth back cover 2C that covers the entire surface of the back pad 2P. Here, the back frame 2F corresponds to the “seat frame” of the present invention, the cloth spring 22 corresponds to the “planar body” of the present invention, and the back pad 2P corresponds to the “cushion material” of the present invention.

  As shown in FIG. 9, the above-described back frame 2 </ b> F is configured to be assembled into a square frame-like skeleton shape along the outer peripheral shape of the seat back 2. Specifically, the back frame 2F is made of a steel pipe that is integrally bridged between a side frame 2F1 made of a steel plate that is long in the pair of left and right seat height directions and the upper end of each side frame 2F1. The upper frame 2F2 and a connecting pipe 2F4 made of a circular steel pipe that is cross-linked so as to be rotatably pivoted between the lower portions of both side frames 2F1. A bridging frame 2F3 made of a horizontally long steel plate is integrally bridged between both side portions of the upper frame 2F2. Here, each side frame 2F1 described above corresponds to the “side frame” of the present invention, and the bridge frame 2F3 corresponds to the “bridge frame” of the present invention.

  The connecting pipe 2F4 described above is configured to integrally connect operation shafts of recliners (not shown) pivotally attached to the lower portions of the side frames 2F1 of the seat back 2, and is pivotably pivoted between the lower portions of the side frames 2F1. It is provided as a worn state. The bridging frame 2F3 is provided in a state of being integrally bridged between both side portions of the upper frame 2F2 that are bridged so as to connect the upper ends of the side frames 2F1 described above. The bridging frame 2F3 described above is formed with hooking portions 2F3a that can be hooked by hooking an upper frame portion 21A of a support wire 21 to be described later from the upper side of the sheet, aligned in four places in the sheet width direction. ing. Each of the hook portions 2F3a is formed as a cut-and-raised portion in which a part of the bridging frame 2F3 is cut and raised from the upper side of the seat to the front side at an oblique angle.

  Similar to the structure of the support body 10 shown in the first embodiment, the support body 20 includes a support wire 21 assembled in a square frame shape and a cloth spring 22 stretched in the frame of the support wire 21. Has been. Here, the support wire 21 corresponds to the “frame” of the present invention. The support wire 21 described above is formed by bending a single steel wire into a square frame shape, and the ends of the wire are welded at the center of the upper frame portion 21A assembled in the square frame shape. By connecting them endlessly, the structural strength against bending and twisting is increased. The support wire 21 described above is hooked in the frame of the back frame 2F as follows. First, the upper frame portion 21A of the support wire 21 is hooked and hooked on the respective hook portions 2F3a formed by cutting and raising the bridge frame 2F3 bridged between the upper frames 2F2 described above. Next, the lower frame portion 21C of the support wire 21 is elastically hooked while being pushed into the connecting pipe 2F4 of the back frame 2F from the front side of the seat and bent. Thus, the support wire 21 is in a state in which the upper frame portion 21A and the lower frame portion 21C are hooked to the bridging frame 2F3 and the connecting pipe 2F4 of the back frame 2F, respectively. It becomes a state.

  Here, the lower frame portion 21C of the support wire 21 described above is formed in a shape in which the lower end portion of each horizontal frame portion 21B is bent in a hook shape on the rear side of the seat, so that the connection pipe 2F4 described above is formed. Thus, it is formed in a shape that can be hooked from the front side of the seat. Therefore, after hooking the above-described upper frame portion 21A on the respective hook portions 2F3a of the bridging frame 2F3, the lower frame portion 21C is elastically hooked while being pushed and bent from the seat front side to the connecting pipe 2F4. As a result, the upper frame portion 21A and the lower frame portion 21C are in a state of being bridged in a state in which they are strongly stretched between the bridge frame 2F3 and the connecting pipe 2F4.

  In addition, the hooks 21E provided so as to extend outward from the central portion of the horizontal frame portions 21B are supported by the hooks 21E of the side frames 2F1 of the back frame 2F. It will be in the state hooked on the front part. As a result, the support wire 21 is also bridged between the side frames 2F1 of the back frame 2F, and is supported in each of the upper, lower, left, and right parts of the back frame 2F. It will be in the state assembled to.

  Here, in each hook part 21E provided in each horizontal frame part 21B mentioned above, the part applied to the rear surface part of each horizontal frame part 21B seems to crawl on the rear surface part of each horizontal frame part 21B. It is formed in a shape bent into a hook shape, and is welded to the rear surface portion of each horizontal frame portion 21B. Thereby, each hook part 21E is made into the state firmly couple | bonded with respect to each horizontal frame part 21B so that the backrest load concerning each horizontal frame part 21B can be supported strongly. And each hook part 21E is made into the shape extended diagonally from the welding part with each horizontal frame part 21B mentioned above to the sheet | seat outer front, Furthermore, it is in the middle of being bent in the mountain shape of the extended tip. Each flat part is configured to be hooked and hooked so as to come into surface contact with the front surface of each side frame 2F1. With this hooking, the hook portions 21E are hooked so as not to be displaced in the seat width direction with respect to the side frames 2F1 by the portions bent in a mountain shape straddling the front portions of the side frames 2F1. It is assumed that

  Subsequently, the cloth spring 22 is formed of one cloth material having extensibility having a high tensile strength capable of receiving a load of a seated occupant. The cloth spring 22 is set in such a manner that the left and right edges thereof are pulled into the horizontal frame portions 21B of the support wire 21 described above, and these mating portions are formed by insert molding a resin material. The film portions 21D are integrally coupled to each other so that they are stretched between the horizontal frame portions 21B.

  The cloth spring 22 described above is formed of a single cloth material, and the stretched region covers the body surface portion 22A that covers the region in the frame below the bridge frame 2F3 of the back frame 2F, and the bridge frame. And an extended surface portion 22 </ b> B that hangs on the front portion of 2 </ b> F <b> 3. The main body surface portion 22A is formed as a surface portion that occupies most of the cloth spring 22 and is stretched so as to cover a wide area in the seat height direction between the bridging frame 2F3 and the connecting pipe 2F4 of the back frame 2F. Has been. The extended surface portion 22B is formed as a surface portion that occupies the region of the upper edge portion of the cloth spring 22, and is in a state of being stretched so as to be hooked on the front portion of the above-described bridging frame 2F3.

  The back pad 2P is formed by foaming a flexible polyurethane foam raw material. The back pad 2P is assembled to the front part of the above-described back frame 2F, so that each frame part (each side frame 2F1, upper frame 2F2, connecting pipe 2F4) of the back frame 2F and the above-described support body 20 It is designed to be supported by a wide surface from the side. Specifically, the back pad 2P is in a state of being firmly supported from the rear side by the outer peripheral portion supported by each frame portion of the above-described back frame 2F, and by the cloth spring 22 of the support body 20 described above. In the supported center part, it is made into the state elastically softly supported from the back side by the tension | tensile_strength of the cloth spring 22. FIG.

  Specifically, the above-described back pad 2P is assembled and set so as to cover each frame portion (each side frame 2F1, upper frame 2F2, connecting pipe 2F4) of the back frame 2F from the seat outer peripheral side. Yes. Then, after the back pad 2P is assembled to the front portion of the back frame 2F, a back cover 2C (see FIG. 8) is placed so that the entire surface (the seating surface and the upper, lower, left and right side surfaces) is covered. Then, each peripheral portion of the back cover 2C is pulled and fixed to the back portion of the back frame 2F, so that each frame portion (each side frame 2F1, upper frame) of the back frame 2F is formed by the tension of the back cover 2C. 2F2 and connecting pipe 2F4) are pressed against each other and are in close contact with each other.

  Specifically, the back pad 2P described above is in a state where the upper part 2Pa is assembled and supported so as to cover the upper frame 2F2 of the back frame 2F described above from the front side and the upper side, respectively, and the lower part 2Pc, The connecting pipe 2F4 of the back frame 2F is assembled and supported so as to cover the front side and the lower side, respectively. With the above assembly, the back pad 2P is configured such that the central waist support portion 2Pb that receives strong body pressure from the waist of the seated occupant is appropriately softly received from the rear side by the cloth spring 22 of the support 20 described above. However, the outer peripheral portion is held in a state that is strongly and stably supported from the rear side by each frame portion (each side frame 2F1, upper frame 2F2, connecting pipe 2F4) of the back frame 2F described above. Yes.

  Here, on the front side surface portion of the back pad 2P described above, a portion of the back cover 2C (see FIG. 8) that is covered so as to cover the entire surface can be suspended and fixed inside. A recessed groove 2P1 is formed. Further, on the back side surface portion (back surface portion) of the back pad 2P, a convex portion 2P2 swelled like a shelf on the rear side of the seat is formed at a portion of the back frame 2F3 that supports the vicinity of the scapula of the seated occupant ing. The convex portion 2P2 is formed widely over most of the region in the seat width direction on the bridging frame 2F3 of the back pad 2P. When the seat occupant's load is applied to the back pad 2P, Prior to this part, it is supported by being pushed rearward. By forming the convex portion 2P2, the body pressure of the seated occupant can be received by being widely dispersed in the formation portion of the convex portion 2P2 without concentrating on the waist supporting portion 2Pb of the back pad 2P that supports the waist portion. Yes.

  The protrusion 2P2 described above is not provided on the bridge frame 2F3 because the cloth spring 22 of the support 20 described above is provided with the extension surface 22B extended so as to be hooked on the bridge frame 2F3. The extended surface portion 22B is provided so as to be supported from the lower side. Accordingly, the convex portion 2P2 that receives the above-described strong crushing force and is pressed to the rear side is supported by the soft cloth spring 22 as compared with the bridging frame 2F3, so that the abrasion of the convex portion 2P2 can be reduced. it can.

  As described above, the seat 1 of this embodiment includes the frame-shaped back frame 2F and the flexible cloth spring 22 that is stretched within the frame of the back frame 2F and supports the load of the seated occupant on the surface. The cloth spring 22 is bridged between both side frames 2F1 of the back frame 2F, and the body surface portion 22A covering the inside of the back frame 2F and the side far from the hip point HP of both side frames 2F1 And an extended surface portion 22B extended so as to be hooked on the bridge frame 2F3 which is bridged between the end portions, and the extended surface portion 22B is also configured to support the load of the seated occupant.

  With this configuration, the cloth spring 22 is stretched so as to cover not only the frame of the back frame 2F but also the bridging frame 2F3 bridged between the ends of the side frames 2F1 on the side far from the hip point HP. It is said. Thereby, the load of the seated occupant can be widely supported by the surface by the cloth spring 22.

  Further, the back pad 2P has a configuration in which a convex portion 2P2 for increasing the pressing force against the extension surface portion 22B is formed on a portion supported by the extension surface portion 22B of the cloth spring 22 hung on the bridging frame 2F3. . Thus, the convex part 2P2 is formed in the part supported by the said extended surface part 22B of the back pad 2P, Therefore The support force of the back pad 2P can be raised in this part. This also allows the body pressure of the seated occupant to be applied to the back pad 2P to be widely dispersed in the portion where the convex portion 2P2 is formed without concentrating on the portion where the body pressure such as the waist is strongly applied.

  Further, since the cloth spring 22 is provided so as to be hooked on the bridge frame 2F3 that supports the vicinity of the scapula of the seated occupant, the support of the back pad 2P by the cloth spring 22 to the support of the back pad 2P by the bridge frame 2F3. Migration will take place at the overlap of both. Therefore, the step of the supporting force generated at the boundary portion between the cloth spring 22 and the bridge frame 2F3 can be effectively relaxed, and the load of the seated occupant can be supported by the cloth spring 22 in a better form.

  As mentioned above, although embodiment of this invention was described using two Examples, this invention can be implemented with various forms other than the said Example. For example, the “vehicle seat” of the present invention may be a seat applied to vehicles other than automobiles such as railways, and is widely applied to seats used for various vehicles such as aircraft and ships. It is something that can be done. Further, the “vehicle seat” of the present invention is configured to support the load of a seated occupant by a planar body stretched in the frame of the seat frame, and does not include a “cushion material”. It may be. The “cushion material” may be a structure other than a pad having an elastic structure that softly receives a load of a seated occupant such as a net material.

  In addition, the “planar body” of the present invention may be directly attached to the seat frame and stretched, and as shown in the above embodiments, the frame body (support wires 11 and 21) is interposed. It may be attached to the seat frame. Further, the “planar body” may be a flexible planar body such as a cloth material, and may be a planar body having no extensibility. Specific examples of the material of the “planar body” include fabric (woven fabric, knitted fabric, non-woven fabric), leather (natural leather, synthetic leather), and net body (member obtained by weaving fibers in a mesh shape). . Further, the “planar body” may be provided by being bridged between the frames of the seat frame, and may be bridged only between the side frames or bridged only between the front and rear frames. There may be.

1 seat (vehicle seat)
2 Seat back 2F Back frame (seat frame)
2F1 side frame (side frame)
2F2 Upper frame 2F3 Cross-linking frame (cross-linking frame)
2F3a Hook 2F4 Connecting pipe 2P Back pad (cushion material)
2Pa Upper part 2Pb Waist support part 2Pc Lower part 2P1 Suspension groove 2P2 Convex part 2C Back cover 3 Seat cushion 3F Cushion frame (seat frame)
3F1 side frame (side frame)
3F2 Front panel (Bridged frame)
3F2a Front plate part 3F2b Top plate part 3F2c Inclined part 3F2c1 Hook part 3F3 Rear pipe 3P Cushion pad (cushion material)
3Pa Front 3Pb Bottom support 3Pc Rear 3P1 Suspension groove 3P2 Convex 3C Cushion cover 4 Lifter mechanism 5 Slide rail 10 Support 11 Support wire (frame)
11A Front frame portion 11B Horizontal frame portion 11B1 First bent portion 11B2 Second bent portion 11B3 Third bent portion 11C Rear frame portion 11D Coating portion 11E Hook portion 12 Cloth spring (planar body)
12A Main body surface portion 12B Extension surface portion 20 Support body 21 Support wire (frame body)
21A Upper frame portion 21B Horizontal frame portion 21C Lower frame portion 21D Coating portion 21E Hook portion 22 Cloth spring (planar body)
22A Main body surface portion 22B Extension surface portion HP Hip point We1 Spot welded portion We2 Spot welded portion

Claims (4)

A vehicle seat having a frame-shaped seat frame and a flexible planar body that is stretched within the frame of the seat frame and supports the load of a seated occupant on the surface,
The planar body is bridged between frames of the seat frame, and is bridged between a main body surface portion covering the inside of the frame of the seat frame and an end portion on the side far from the hip point of the seated occupant in the side frames. A vehicle seat, comprising: an extended surface portion extended so as to hang on the bridge frame, and the extended surface portion supporting a load of a seated occupant. The vehicle seat according to claim 1,
Furthermore, it has a cushion material that is provided in a state supported from the back side by the planar body and the seat frame and softly receives the load of the seated occupant,
The cushion material has a configuration in which a convex portion for increasing a pressing force against the extension surface portion is formed to protrude from a portion supported by the extension surface portion of the planar body hung on the bridge frame. A feature vehicle seat. The vehicle seat according to claim 1 or 2,
The bridge frame is a plate-like front panel bridged between the front end portions of both side frames of the seat cushion,
The front panel is shaped to have a top plate portion that faces the upper side of the seat, and an inclined portion that extends from the rear edge portion of the top plate portion in a downward direction behind the seat,
The planar body is provided in a state in which the extended surface portion is hooked on the inclined portion from above the seat, and a front edge portion of the extended surface portion is hooked and hooked on the inclined portion. A vehicle seat characterized by The vehicle seat according to any one of claims 1 to 3,
The planar body is stretched on a frame body, and the frame body is attached to the seat frame, whereby the planar body is bridged between the frames of the seat frame via the frame body; Vehicle seat characterized by being made.

Images