JP2015020596A - Vehicle seat structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle seat structure including a pair of right and left side frames, capable of stretching a net material serving as a cushion material in a seat width direction so as to attain a necessary seat surface reaction force distribution.SOLUTION: A vehicle seat structure comprises: a seat cushion (2); and a seat back (4). The seat cushion (2) includes: a pair of right and left side tabular frames (14); a U-shaped pipe frame (16) arranged between the paired side frames (14), supported by these side frames (14), and opening rearward in a plane view; and a net (40) stretched in a seat width direction between a pair of right and left net supports (16a) of the pipe frame (16) extending in a front-to-rear direction.

Description

  The present invention relates to a vehicle seat structure, and more particularly to a vehicle seat structure having a pair of left and right side frames.

  The seat cushion of a vehicle seat is required to have vibration absorption performance and shock absorption performance in order to maintain the posture and comfort of the occupant. In order to meet these requirements, springs and urethane pads have been used as cushioning materials for seat cushions, but in recent years, for the purpose of reducing vehicle seat weight, improving vibration absorption characteristics and shock absorption characteristics, It has been proposed to use a net material as a cushioning material.

  For example, Patent Document 1 discloses a seat structure in which a base net is stretched on a seat cushion portion to give a predetermined cushion characteristic. The seat cushion portion in the seat structure of Patent Document 1 includes a pair of left and right side frames, a front frame provided between the front portions of the pair of left and right side frames, and a rear portion of the pair of side frames. A rear base frame is provided, and a cushion base net is stretched in the front-rear direction between the front frame and the rear frame.

JP 2011-224049 A

Here, as disclosed in Patent Document 1, a pair of left and right side frames of a conventional vehicle seat is formed of a plate material, and is erected vertically with respect to the floor of the passenger compartment. In other words, these pair of left and right side frames have low rigidity against the force in the seat width direction, so it is not possible to support the occupant's weight by stretching the net material between these side frames in the seat width direction. Have difficulty.
Therefore, in the seat structure of Patent Document 1, a front frame and a rear frame are provided between a pair of left and right side frames, and a cushion base net is disposed between the front frame and the rear frame in the front-rear direction. It is stretched.

  However, when the net material as the cushion material is stretched in the longitudinal direction of the vehicle as in Patent Document 1, the left and right ends of the net material are not structurally supported, so the tension of the net material in the seat width direction is increased. There is a problem in that it cannot be maintained sufficiently and a distribution of a required seating surface reaction force cannot be obtained.

  The present invention has been made to solve the above-described problems of the prior art, and in a seat structure of a vehicle seat having a pair of left and right side frames, a necessary seating surface reaction force distribution can be obtained. An object of the present invention is to provide a vehicle seat structure in which a net material as a cushion material can be stretched in the seat width direction.

In order to achieve the above object, a vehicle seat structure of the present invention is a vehicle seat structure including a seat cushion and a seat back, and the seat cushion includes a pair of left and right plate-like side frames, and a pair of Between the side frames and supported by these side frames, a U-shaped pipe frame opened rearward in plan view, and a pair of left and right net support portions extending in the front-rear direction in the pipe frame And a net stretched in the width direction.
In the present invention configured as described above, the seat cushion is disposed between the pair of left and right plate-like side frames and the pair of side frames, and is supported by these side frames and opened rearward in plan view. Since the net has a U-shaped pipe frame and the net is stretched in the sheet width direction between a pair of left and right net support portions extending in the front-rear direction in the pipe frame, the tension in the sheet width direction generated in the net Can be sufficiently maintained by a pipe frame having a higher rigidity than that of a plate material, whereby a necessary distribution of the seating surface reaction force can be obtained.

In the present invention, preferably, it has a stabilizer pipe that connects the rear portions of the pair of left and right side frames in the seat width direction, and the rear ends of the pipe frames are below the upper side portions of the pair of side frames, It extends to the vicinity of the connection position with the stabilizer pipe.
In the present invention configured as described above, the rear end of the pipe frame extends below the upper side of the pair of side frames to the vicinity of the connection position between the side frame and the stabilizer pipe. The rear end of the stretched net support portion can be arranged at a height position suitable for the rear end of the seat surface of the vehicle seat, so that the net can be placed at a height position suitable for the seat surface of the vehicle seat. It can be stretched to the rear end of the pipe frame.

In the present invention, preferably, the stabilizer pipe is rotatably connected to the rear portions of the pair of left and right side frames, and the rear end of the pipe frame is located near the connection position between the side frame and the stabilizer pipe. Fixed to the pipe, the pipe frame is pivotally supported on the side frame via the stabilizer pipe.
In the present invention configured as described above, the rear end of the pipe frame is fixed to a stabilizer pipe that is rotatable with respect to the side frame in the vicinity of the connection position between the side frame and the stabilizer pipe. Since the pipe frame is pivotally supported by the side frame, the pipe frame with the net stretched can be swung up and down around the rear end of the pipe frame as an axis. The height of the seating surface can be adjusted.

Moreover, in this invention, Preferably, it has the pad material mounted in the front part upper side of the pipe frame.
In the present invention configured as described above, since the pad material is placed on the upper front side of the pipe frame, the seat cushion is obtained while obtaining the required seating surface reaction force distribution by the net stretched on the pipe frame. The support necessary for the front part of the pad can be obtained by the pad material.

Further, in the present invention, preferably, a pad material integrally formed in a U shape with the rear portion opened is placed on the upper front portion of the pipe frame and the upper side portion of the pair of side frames.
In the present invention configured as described above, since the pad material integrally formed in a U shape with the rear part opened is placed on the upper front part of the pipe frame and the upper side part of the pair of side frames, While obtaining the required seat surface reaction force distribution by the net stretched on the frame, it is possible to obtain the necessary support for the front portion and the left and right end portions of the seat cushion with the pad material with a simple configuration.

  According to the present invention, a net material as a cushion material can be stretched in the seat width direction, and a necessary distribution of the seating surface reaction force can be obtained.

It is the perspective view which looked at the external appearance structure of the vehicle seat structure by embodiment of this invention from diagonally right front and upper direction. It is the perspective view which looked at the vehicle seat structure by embodiment of this invention from diagonally left front and upper direction. It is the elements on larger scale which looked at the peripheral structure of the pipe frame of the seat structure for vehicles by the embodiment of the present invention from the slanting left front and the upper part. It is the elements on larger scale which looked at the rear stabilizer pipe neighborhood of the seat structure for vehicles by the embodiment of the present invention diagonally left front and from the upper part. It is the elements on larger scale which looked at the front stabilizer pipe neighborhood of the seat structure for vehicles by the embodiment of the present invention from the upper left. It is the perspective sectional view which looked at the cushion material of the vehicular seat structure by the embodiment of the present invention from diagonally upper left. FIG. 7 is a perspective cross-sectional view of the cushion material shown in FIG. 6 with a pleated pad removed. It is the elements on larger scale which looked at the peripheral structure of the pipe frame where the net | network stretched by embodiment of this invention was seen from diagonally left front and upper direction. It is the elements on larger scale which looked at the peripheral structure of the pipe frame of the vehicle seat structure by the modification of embodiment of this invention from diagonally left front and upper direction.

Hereinafter, a vehicle seat structure according to an embodiment of the present invention will be described with reference to the accompanying drawings.
First, an overall configuration of a vehicle seat structure according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a perspective view of an external configuration of a vehicle seat structure according to an embodiment of the present invention as viewed obliquely right front and from above, and FIG. 2 illustrates a vehicle seat structure according to an embodiment of the present invention obliquely left front and It is the perspective view seen from the upper part.

First, as shown in FIG. 1, reference numeral 1 denotes a vehicle seat according to an embodiment of the present invention, and the vehicle seat 1 includes a seat cushion 2 and a seat back 4. In the present embodiment, the seat 1 is provided in the vehicle front-rear direction so that the seat width direction coincides with the vehicle width direction.
Further, on the right side of the seat, there are a tilt lever 6 for swinging the seat cushion 2 up and down and a reclining lever for reclining the seat back 4 by a reclining mechanism, which are manually operated by the occupants. Is provided.

  Next, as shown in FIGS. 1 and 2, a slide mechanism that extends in the vehicle front-rear direction and supports the seat cushion 2 slidably in the seat front-rear direction (vehicle front-rear direction) on the vehicle body floors on the left and right sides of the seat. 8 are provided. These slide mechanisms 8 are mainly composed of guide rails 10 fixed to the floor and sliders 12 that are slidably engaged with these guide rails 10.

Next, as shown in FIGS. 1 and 2, the seat cushion 2 is disposed between a pair of left and right plate-like side frames 14 fixed to the slider 12 of the slide mechanism 8 and the pair of side frames 14. A U-shaped pipe frame 16 that is supported by these side frames 14 and opens rearward in plan view, a front stabilizer pipe 18 that connects the front portions of the left and right side frames 14 in the seat width direction, The rear stabilizer pipe 20 connects the rear portion of the side frame 14 in the seat width direction. And the cushion material 22 mentioned later is provided so that the side frame 14 and the pipe frame 16 may be covered from upper direction.
The seat back 4 has a seat back frame 24 for supporting the seat back 4 itself. Lower end portions on both the left and right sides of the seat back frame 24 are respectively connected to upper rear sides of the left and right side frames 14 of the seat cushion 2 via a reclining mechanism. With this reclining mechanism, the seat back 4 The seat back frame 24 can swing back and forth about the lower end portion of the seat back frame 24 as an axis. A seat back pad material 26 is provided so as to cover the seat back frame 24.

Next, the structure of the seat cushion 2 will be described in detail with reference to FIGS.
FIG. 3 is a partially enlarged perspective view of the peripheral structure of the pipe frame 16 of the vehicle seat structure according to the embodiment of the present invention as seen obliquely from the front left and from above, and FIG. 4 is a vehicle seat according to the embodiment of the present invention. FIG. 5 is a partially enlarged perspective view of the vicinity of the rear stabilizer pipe 20 of the structure as viewed obliquely from the left front and from above, and FIG. 5 is a partially enlarged perspective view of the vicinity of the front stabilizer pipe of the vehicle seat structure according to the embodiment of the present invention as viewed from the upper left. FIG.

First, as shown in FIG. 3, in the U-shaped pipe frame 16 opened rearward in a plan view, portions extending in the front-rear direction (hereinafter referred to as “net support portion 16 a”) are provided on the left and right ends of the net described later. A locking member 28 is provided for locking. The locking member 28 extends in the front-rear direction along the left and right net support portions 16a, and has a base portion 28a fixed to the lower surface of the net support portion 16a, and a side surface of the pipe frame 16 from the base portion 28a at regular intervals. And a hook 28b formed so as to extend inward and upward of the seat cushion 2. A gap is provided between the hook 28b and the side surface of the pipe frame 16, so that the left and right ends of the net can be locked between the hook 28b and the side surface of the pipe frame 16.
In addition, a cushion support 30 that is formed of a solid round bar and supports a cushion material 22 described later from below is provided at the front portion of the pipe frame 16.

  Next, as shown in FIGS. 3 and 4, the rear end of the pipe frame 16 extends below the upper sides of the left and right side frames 14 to the vicinity of the connection position between the side frames 14 and the rear stabilizer pipe 20. ing. A connection bracket 32 is welded to the rear end of the pipe frame 16, and the connection bracket 32 is welded to the end of the rear stabilizer pipe 20. Thereby, the rear end of the pipe frame 16 is fixed to the rear stabilizer pipe 20 via the connection bracket 32.

The rear rib pipe 20 is connected to the rear portions of the left and right side frames 14 by bolts at both ends, and is rotatable with respect to these side frames 14 around the bolts.
That is, the entire pipe frame 16 is pivotally supported on the side frame 14 via the rear stabilizer pipe 20 and can swing up and down about the rear stabilizer pipe 20.

  Next, as shown in FIG. 5, the front stabilizer pipe 18 is connected to the front portion of the side frame 14 by a bolt at its end, and can rotate with respect to the side frame 14 around the bolt. Yes.

  The right side frame 14 is provided with a known drive unit including a gear, a ratchet, and the like for rotating the front stabilizer pipe 18. This drive unit is connected to the tilt lever 6 so that the pipe frame 16 is swung up and down by the occupant's lever operation. As shown in FIG. 5, the drive unit includes a pinion gear 34 that rotates by operating the tilt lever 6. Further, a tilt gear 36 is welded to the right end portion of the front stabilizer pipe 18, and the tilt gear 36 meshes with the pinion gear 34 of the drive unit.

As shown in FIG. 5, a link mechanism 38 that connects the end portion of the front stabilizer pipe 18 and the front portion of the pipe frame 16 is provided at the right front portion of the seat cushion 2. The link mechanism 38 connects the connection plate 38a welded to the end of the front stabilizer pipe 18, the connection bracket 38b fixed to the front portion of the pipe frame 16, and the connection plate 38a and the connection bracket 38b. And a link member 38c. The lower end of the link member 38c is rotatably connected to the upper end of the connection plate 38a, and the upper end of the link member 38c is rotatably connected to the lower end of the connection bracket 38b.
A link mechanism similar to the above-described link mechanism 38 is also provided at the left front portion of the seat cushion 2.

  When the occupant operates the tilt lever 6, the pinion gear 34 of the drive unit is driven and rotated, and the rotation of the pinion gear 34 is transmitted to the tilt gear 36. As a result, the front stabilizer pipe 18 welded to the tilt gear 36 rotates, and the connection plate 38a welded to the front stabilizer pipe 18 rotates to move the connection bracket 38b up and down via the link member 38c. The pipe frame 16 fixed to the bracket 38b swings up and down.

Next, the structure of the cushion material 22 of the vehicle seat structure according to the embodiment of the present invention will be described with reference to FIGS.
FIG. 6 is a perspective cross-sectional view of the vehicle seat structure cushion material 22 according to the embodiment of the present invention as viewed obliquely from the front left and from above, and FIG. 7 excludes the pleat pad from the cushion material 22 shown in FIG. FIG.

  First, as shown in FIGS. 6 and 7, the cushion material 22 is provided on the net 40 and the net 40 stretched in the seat width direction between the net support portions 16 a of the pipe frame 16. A U-shaped pad material 42 opened rearward in plan view, and a pleat pad 44 provided on the front portion of the pad material 42 and the upper surface of the net 40 are provided. The net 40, the pad material 42 and the pleat pad 44 are sewn together at the positions of the left and right end portions of the net 40.

  Next, as shown in FIG. 7, the pad member 42 includes a front support 42a extending in the seat width direction at the front portion of the pad member 42, and side supports 42b extending rearward from both ends of the front support 42a. The front support 42a and the side support 42b are integrally formed. The front support 42 a of the pad material 42 is placed on the cushion support 30 provided at the front portion of the pipe frame 16, and the side support 42 b of the pad material 42 is placed on the upper side portion of the side frame 14. The pad material 42 is made of urethane foam.

  Next, as shown in FIG. 6, the pleat pad 44 is provided between the side supports 42 b of the pad material 42, and covers the front support 42 a of the pad material 42 and the net 40. The pleated pad 44 is made of urethane foam, and a skin 44a is sewn on the surface thereof.

  Next, as shown in FIG. 7, the net 40 is provided on the lower surface side of the side support 42 b behind the front support 42 a of the pad material 42.

Next, referring to FIG. 8, a structure for attaching the net 40 of the vehicle seat structure according to the embodiment of the present invention will be described.
FIG. 8 is a partially enlarged perspective view of the peripheral structure of the pipe frame 16 on which the net 40 according to the embodiment of the present invention is stretched, as viewed obliquely from the upper left. As described above, the cushion material 22 is attached on the side frame 14 and the pipe frame 16 in a state where the net 40, the pad material 42, and the pleat pad 44 are sewn together to form a unit, but in FIG. In order to explain the attachment structure of the net 40 to the pipe frame 16, the state where the pad material 42 and the pleat pad 44 are omitted is shown.

  As shown in FIG. 8, a plurality of slits 40a are formed at the left and right end portions of the net 40 at the same interval as the hooks 28b of the locking member 28 fixed to the net support portion 16a of the pipe frame 16. By inserting the hooks 28b of the locking member 28 into the respective slits 40a, the left and right ends of the net 40 are locked to the locking member 28, and the net in the sheet width direction is interposed between the left and right net support portions 16a. 40 is stretched. The net 40 is formed of a stretchable fabric such as Hanex (registered trademark).

Next, a further modification of the embodiment of the present invention will be described with reference to FIG.
FIG. 9 is a partially enlarged perspective view of the peripheral structure of the pipe frame 16 of the vehicle seat structure according to the modification of the embodiment of the present invention as viewed obliquely from the front left and from above.

In the embodiment described above, the rear stabilizer pipe 20 is rotatably connected to the rear portions of the left and right side frames 14, and the rear end of the pipe frame 16 is welded to the rear stabilizer pipe 20, whereby the pipe frame 16 is The rear cushion pipe 20 is pivotable up and down, and a link mechanism 38 that connects the end portion of the front stabilizer pipe 18 and the front portion of the pipe frame 16 is provided at the front portion of the seat cushion 2. However, these configurations for allowing the pipe frame 16 to swing up and down may be omitted.
In this case, as shown in FIG. 9, the rear stabilizer pipe 20 is fixed to the rear portions of the left and right side frames 14. The connection bracket 32 is welded to the rear end of the pipe frame 16 in the same manner as in the above-described embodiment, and the connection bracket 32 is bolted to the rear part of the left and right side frames 14. Further, in this modification, the link member 38c in the link mechanism 38 of the above-described embodiment is omitted, and the connection plate 38a welded to the end portion of the front stabilizer pipe 18 and the connection fixed to the front portion of the pipe frame 16. The brackets 32 are directly connected to each other.

  Next, the effect of the vehicle seat structure according to the above-described embodiment of the present invention and the modification of the embodiment of the present invention will be described.

  First, in the present embodiment, the seat cushion 2 is disposed between a pair of left and right plate-like side frames 14 and the pair of side frames 14, and is supported by these side frames 14 and is rearward in a plan view. The net 40 has an open U-shaped pipe frame 16 and is stretched in the seat width direction between a pair of left and right net support portions 16 a extending in the front-rear direction in the pipe frame 16. The generated tension in the width direction of the seat can be sufficiently maintained by the pipe frame 16 having a higher rigidity than that of the plate material, and thus a necessary distribution of the seating surface reaction force can be obtained.

  Further, since the rear end of the pipe frame 16 extends below the upper side of the pair of side frames 14 to the vicinity of the connection position between the side frame 14 and the rear stabilizer pipe 20, the net 40 is stretched. The rear end of the net support portion 16a can be arranged at a height position suitable for the rear end of the seat surface of the vehicle seat 1, whereby the net 40 is placed at a height position suitable for the seat surface of the vehicle seat 1. It can be stretched up to the rear end of the pipe frame 16.

  In particular, the rear end of the pipe frame 16 is fixed to the rear stabilizer pipe 20 that can rotate with respect to the side frame 14 in the vicinity of the connection position between the side frame 14 and the rear stabilizer pipe 20. The pipe frame 16 on which the net 40 is stretched can be swung up and down around the rear end of the pipe frame 16 as an axis. The height of the seat cushion 2 can be adjusted.

  Further, since the pad material 42 is placed on the upper front side of the pipe frame 16, it is necessary for the front part of the seat cushion 2 while obtaining the necessary seating surface reaction force distribution by the net 40 stretched on the pipe frame 16. Support can be obtained by the pad material 42.

  In particular, since a pad material 42 integrally formed in a U shape with the rear part opened is placed on the upper front part of the pipe frame 16 and the upper side part of the pair of side frames 14, it is stretched on the pipe frame 16. The necessary support for the front portion and the left and right end portions of the seat cushion 2 can be obtained by the pad material 42 with a simple configuration while obtaining the distribution of the required seating surface reaction force by the net 40.

DESCRIPTION OF SYMBOLS 1 Seat 2 Seat cushion 4 Seat back 6 Tilt lever 8 Slide mechanism 10 Guide rail 12 Slider 14 Side frame 16 Pipe frame 16a Net support part 18 Front stabilizer pipe 20 Rear stabilizer pipe 22 Cushion material 24 Seat back frame 26 Seat back pad material 28 Locking member 28a Base portion 28b Hook 30 Cushion support 32 Connection bracket 34 Pinion gear 36 Tilt gear 38 Link mechanism 38a Connection plate 38b Connection bracket 38c Link member 40 Net 40a Slit 42 Pad material 42a Front support 42b Side support 44 Pleated pad 44a Skin

Claims (5)

A vehicle seat structure including a seat cushion and a seat back,
The above seat cushion
A pair of left and right plate-shaped side frames;
A U-shaped pipe frame which is disposed between the pair of side frames and supported by these side frames and which opens rearward in plan view;
A vehicle seat structure comprising: a net stretched in a seat width direction between a pair of left and right net support portions extending in the front-rear direction in the pipe frame. A stabilizer pipe for connecting the rear portions of the pair of left and right side frames in the seat width direction;
2. The vehicle seat structure according to claim 1, wherein a rear end of the pipe frame extends below a top side of the pair of side frames to a position near a connection position between the side frame and the stabilizer pipe. . The stabilizer pipe is connected to the side frames so as to be rotatable with respect to the rear portions of the pair of left and right side frames.
The rear end of the pipe frame is fixed to the stabilizer pipe in the vicinity of the connection position of the side frame and the stabilizer pipe so that the pipe frame is pivotally supported by the side frame via the stabilizer pipe. The vehicle seat structure according to claim 2.   The vehicle seat structure according to any one of claims 1 to 3, further comprising a pad material placed on the upper front side of the pipe frame.   5. The vehicle seat structure according to claim 4, wherein the U-shaped pad material opened rearward in a plan view is placed on the front upper side of the pipe frame and the upper sides of the pair of side frames.

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