JP4545396B2 - Structure of vehicle seat cushion - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a structure of a vehicle seat cushion suitable for a long seat for a train.
[0002]
[Prior art and its problems]
Conventional seat cushions (seat buns) for vehicles such as trains and automobiles generally have a structure in which a seat cushion stuffing (pad) is covered with a seat skin and wrapped. In this conventional structure, when the seating on the seat cushion by the user is repeated, the seat cushion stuffing becomes fragile, and the seat epidermis may be loosened and wrinkled.
[0003]
A means for solving such a problem is disclosed in Patent Document 1, for example. In this known example, the wire frame 113 is embedded in the seat cushion stuffing 111, and the end portion 115 a of the sheet-like connecting member 115 is wound around the wire frame 113 exposed from the seat cushion stuffing 111. On the other hand, a hook member 119 is attached to the edge of the seat cover 117 that covers the seat cushion stuffing 111 to the bottom surface of the seat cushion stuffing 111, and the hook member 119 is engaged with the wire frame 113 wound around the end 115a. (See FIGS. 9A and 9B).
[0004]
However, in this seat cushion structure, when the user is seated, the wire frame 113 is pulled strongly, so that when the seating is repeated, the wire frame 113 may be peeled off from the seat cushion stuffing 111 and the seat cushion stuffing 111 may be damaged. was there.
[0005]
[Patent Document 1]
Japanese Patent Laid-Open No. 09-276088 [0006]
OBJECT OF THE INVENTION
The present invention has been made in view of the problems of the conventional vehicle seat cushion, and it is an object of the present invention to provide a structure of a vehicle seat cushion in which the seat cover is less likely to be turned or twisted.
[0007]
SUMMARY OF THE INVENTION
In the present invention, which achieves this object, a seat cushion having a seat cushion covered with a seat cover is placed on the seat cushion receiver, and a seat back formed separately from the seat cushion is detachably attached to the rear upper portion of the seat cushion receiver. A seat cushion structure for a vehicle provided in the seat cover, an extension portion extending from a rear edge of the upper surface of the seat cushion stuffing is provided on the seat cover, and positioned behind the removable seat back, Independent of the seat back, there is provided a pulling means for elastically pulling the extended portion of the seat skin backward and substantially upward from the horizontal.
According to this configuration, even if the user is seated on the seat, the seat skin is freely deformed while stretching the tension means, and when the user leaves the seat, the seat skin is pulled by the tension means. No wrinkles or damage to the seat cushion stuffing.
[0008]
In one of the embodiments, a fixing member of a leg base on which the seat cushion receiver is supported or a locking member that is locked to a fixing member of a vehicle is attached to an end edge portion of the extension portion of the seat skin. A direction in which a slack portion is provided between the locking member of the extension portion and the seat cushion stuffing, and the pulling means is attached to the slack portion, and the interval between the locking member and the seat cushion stuffing is reduced. It is set as the elastic member which acts on. The elastic member is a bent leaf spring having an Ω-shaped cross section along the edge of the extended portion of the seat skin, and the loosened portion is accommodated in the Ω-shaped space of the bent leaf spring. The seat cushion stuffing side portion and the fixing member side portion of the portion are fixed to both free edge portions of the bent leaf spring.
In another embodiment, the pulling means includes an end edge portion of the extension portion of the seat skin, and a fixing member for a leg base or a vehicle fixing member that is positioned behind the seat back and that supports the seat cushion receiver. An elastic member stretched between the two. The elastic member is a coil spring, and a plurality of coil springs are stretched apart from each other along the edge portion. Alternatively, an elastic cloth or a rubber cloth can be used as the elastic member.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of an essential part of an embodiment in which the present invention is applied to a railcar long seat, FIG. 2 is a perspective view showing a pulling means and a locking structure thereof, and FIG. 4 is a side view showing a state in which the sliding cushion is mounted. FIG. 4 is a side view showing a main part of the seat skin pulling means in the same embodiment, where (A) shows an extended use state, and (B) shows an unfolded state. Indicates the usage state.
[0010]
In this long seat, the upper surface of the seat skin 11 covering the seat cushion stuffing 13 is extended to the rear part to form an extension part 11a, and the lateral direction along the rear surface of the rear edge part that becomes the leading edge of the extension part 11a. A hook-and-loop fastener 12a extending in the (left and right direction of the sheet) is fixed. A bent leaf spring 15 having a Ω-shaped cross section is fitted to the extended portion 11a. The bent leaf spring 15 extends over substantially the entire width of the rear edge portion of the seat skin 11. The extension portion 11 a between the hook-and-loop fastener 12 a and the seat cushion stuffing 13 is pushed into the open space of the bent leaf spring 15, and the extension portion 11 a is fixed to both free edges of the bent leaf spring 15. The extended portion 11a housed in the bent leaf spring 15 becomes a slack portion 11b.
The bent leaf spring 15 is formed of an elastic metal plate or synthetic resin, and is fixed to the sheet skin 11 with a rivet 15a or the like.
[0011]
On the other hand, a rear edge support pipe 23 is fixed between the vertical portions of the L-shaped side frame 21 that supports both sides of the long seat, and the hook and loop fastener 12a is engaged with the rear edge support pipe 23. 23a is fixed. A front edge support pipe 24 is fixed to the front end of the horizontal portion of the side frame 21, and a peripheral edge of a seat pan (seat cushion receiver) ( not shown ) is connected to the front edge support pipe 24, the side frame 21, and the rear edge support pipe 23. It is fixed to. On the seat pan, a seat cushion having a seat cushion 11 covered with a seat cover 11 is placed. The side frame 21 is fixed to a vehicle structure (not shown).
[0012]
The seat skin 11 is usually made of a woven fabric such as a raised cloth, and is cut and sewn into a bag shape so as to be covered on the front and side portions of the seat cushion stuffing 13, and the front and side portions are covered on the seat cushion stuffing 13. (See FIG. 3). The seat cushion stuffing 13 is generally formed into a predetermined shape by a laminated cushion such as polyester cotton that can be recycled.
[0013]
In this embodiment, the back surface portion that wraps the rear portion of the seat cushion stuffing 13 is an extended portion 11d that overlaps with the extended portion 11a.
In this embodiment, as schematically shown in FIG. 3, the front edge portion 11 e and the side edge portion (not shown) of the seat cover 11 are turned to the bottom surface side of the seat cushion stuffing 13. Further, in this embodiment, a hook-and-loop fastener (not shown) is attached to the front edge portion 11e of the seat cover 11 along the front edge portion 11e over substantially the entire width of the long sheet. It is the structure engaged with the hook-and-loop fastener (not shown) fixed to.
Moreover, the area | region 11c (refer FIG. 1) which attached | subjected the cross-hatching to the sheet | seat outer skin 11 has shown the area | region which moves when a user seats and separates.
[0014]
The operation of attaching the seat cushion and the seat back to the long seat of this embodiment is roughly as follows. The seat cushion stuffing 13 covered with the seat skin 11 is placed on the seat pan. At that time, the cross-section hooked portion 13 a formed at the lower front edge of the seat cushion stuffing 13 is engaged with the front edge support pipe 24.
Next, the rear edge portion of the extension portion 11 a of the seat skin 11 is pulled up to engage the surface fastener 12 a with the surface fastener 23 a of the rear edge portion support pipe 23.
Although not shown, normally, a surface fastener that can be engaged and disengaged with each other is attached to the portion where the seat skin 11 covers the projection 13a and the front edge support pipe 24, and the seat cushion stuffing and the seat are engaged by the engagement of these surface fasteners. The skin 11 is fixed to the front edge support pipe 24.
[0015]
When the mounting of the seat cushion is completed by the above operation, the seat back 31 is mounted. The seat back 31 has an engagement hook 33 attached to the back surface, and engages the engagement hook 33 with the seat back pipe 27 (see FIG. 3).
In the assembled state, the lower end portion of the seat back 31 is in contact with the region 11 c of the seat cover 11 from above, and also acts as a member that holds the seat cover 11 so that it does not float from the seat cushion stuffing 13.
[0016]
In this completed state, the bent leaf spring 15 pulls the extended portion 11a of the seat skin 11 with the opening narrowed (shrinked) (see FIGS. 3 and 4B).
When the user sits on the seat surface in this state, the seat cushion stuffing 13 is recessed and the seat skin 11 is pulled, so that the bent leaf spring 15 and the slack portion 11b are stretched as shown in FIG. Absorbs its tension.
Thereafter, when the user leaves the seat, the bent leaf spring 15 contracts and pulls the seat skin 11 to maintain the tension state.
[0017]
As described above, in the first embodiment, since the rear edge portion of the seat skin 11 is connected to the rear edge portion support pipe 23 via the bent leaf spring 15, even if the user repeats seating and separation, The seat skin 11 is freely deformed while maintaining a predetermined tension by the expansion and contraction of the bent leaf spring 15. Accordingly, no wrinkles are formed on the seat skin 11 or the seat cushion stuffing 13 does not peel off. Moreover, since the bent leaf spring 15 does not act on the seat cushion stuffing 13, the seat cushion stuffing 13 is not damaged.
[0018]
Next, a second embodiment will be described with reference to FIGS. The second embodiment is characterized in that the rear edge of the seat skin 41 is engaged with the rear edge support pipe 27 via a tension spring. The basic configuration as a sheet is the same as that of the first embodiment.
[0019]
In this embodiment, the upper surface and the rear surface portion of the seat skin 41 covered with the seat cushion stuffing 13 are extended to form extension portions 41a and 41d, and the extension portions 41a and 41d are stacked to serve as an elastic member. The coil spring 43 is pulling.
[0020]
More specifically, the reinforcing tape 42 is affixed to the edge portions of the extension portions 41a and 41d, and a plurality of engagement holes 42a are formed at predetermined intervals in the reinforcement tape 42 and the extension portions 41a and 41d. . A hook 43a opened at one end of the coil spring 43 is engaged with each engagement hole 42a. A hook 43 b formed on the other end of each coil spring 43 is engaged with an engagement portion (a pair of engagement holes) 27 a formed on the rear edge support pipe 27.
[0021]
After the hooks 43b of all the coil springs 43 are engaged with the engaging portions 27a of the rear edge support pipe 27, the seat back 31 is mounted. In the assembled state, the lower end portion of the seat back 31 is in contact with the region 41 c of the seat cover 41 from above, and also acts as a member that holds the seat cover 41 so that it does not float from the seat cushion stuffing 13.
[0022]
In the long seat of the second embodiment, the coil spring 43 is contracted in the unsitting state, and the upper surface of the seat skin 41 is tightly stretched by the tensile force (see FIGS. 7 and 8A). When the user sits on the seat, the seat cushion stuffing 13 is dented by its elasticity, and the seat skin 41 deforms while stretching the coil spring 43 following the deformation of the seat cushion stuffing 13 (FIG. 8B).
When the user leaves the seat, the sheet skin 41 is pulled by the pulling force due to the contraction of the coil spring 43 and is focused.
[0023]
Thus, in the second embodiment, even when the user repeatedly sits and leaves, the coil spring 43 is engaged with the rear edge support pipe 27, one of which is the fixed part of the leg base. Therefore, the seat skin 41 is not formed with wrinkles, and the seat cushion stuffing 13 does not cause unevenness. Moreover, since the coil spring 43 does not act on the seat cushion stuffing 13, the seat cushion stuffing 13 is not damaged.
[0024]
Although the tension coil spring is used in the second embodiment, any elastic member such as a stretchable cloth or a rubber cloth may be used. Further, the elastic member may not be rod-shaped but may be plate-shaped. For example, one end portion of the plate-like rubber may be attached to the rear end edge portion of the sheet skin over the entire width, and a hook or a hook-and-loop fastener may be attached to the other end portion of the plate-like rubber as a locking member.
[0025]
The member that connects the rear edge of the seat skin directly or through an elastic member is not limited to the rear edge support pipes 23 and 27, and is positioned above the upper surface of the seat skin and covered with a seat back or the like. Any member can be used as long as it is hidden.
In the illustrated embodiment, both the upper surface and the back surface of the sheet skin are extended to form the extended portion, but only the portion forming the upper surface may be extended to form the extended portion.
[0026]
In the illustrated embodiment, a seat cushion stuffing covered with a seat skin is supported by a footrest having an L-shaped side frame 21, and an extended portion 11 a of the seat skin 11 is attached between the side frames 21, a rear edge support pipe 27. However, the present invention is not limited to this structure. For example, when a seat pan or the like on which a seat cushion stuffing with a seat cover is placed is placed on a leg base fixed to the floor surface, and a fixing member that supports the seat back is provided away from the leg base In this case, the tension means for extending the extended portion of the seat skin may be connected to a fixing member of the seat back or a fixing member such as a vehicle wall or a fixing member attached to the wall.
[0027]
【The invention's effect】
As is apparent from the above description, in the vehicle seat structure of the present invention, an extension portion extending from the rear edge of the seat cushion stuffing is provided on the seat skin of the vehicle seat, and the extension portion is substantially horizontally oriented rearward. In addition, since the tension means for elastically pulling upward is provided, the tensile force acting on the seat skin is absorbed by the elastic member due to the user's seating, so even if the user's seating and separation are repeated for a long time There is no wrinkling on the seat skin, no bulging from the seat cushion stuffing, and no damage to the seat cushion stuffing.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a main part of a first embodiment in which the present invention is applied to a railcar long seat.
FIG. 2 is a perspective view showing a pulling means and a locking structure thereof according to the embodiment.
FIG. 3 is a side view showing a state in which a backslide cushion is mounted in the embodiment.
4A and 4B are side views showing the main part of the sheet skin pulling means in the embodiment, where FIG. 4A shows an extended use state, and FIG. 4B shows a contracted unused state.
FIG. 5 is a perspective view showing a main part of a second embodiment in which the present invention is applied to a railcar long seat.
FIG. 6 is a perspective view showing a pulling means and a locking structure thereof according to the second embodiment.
FIG. 7 is a side view showing a state in which a backslide cushion is mounted in the second embodiment.
FIGS. 8A and 8B are side views showing the main part of the sheet skin pulling means in the second embodiment, where FIG. 8A shows an extended use state, and FIG. 8B shows a contracted unused state. is there.
9A and 9B are views showing a conventional vehicle seat cushion, in which FIG. 9A is a perspective view and FIG. 9B is a cross-sectional view of a main part.
[Explanation of symbols]
11 Seat skin 11a Extension part 11b Slack part 11d Extension part 12a Surface fastener (locking member)
13 Seat cushion stuffing 15 Bent leaf spring (elastic member)
21 Side frame 23 Rear edge support pipe 23a Surface fastener 24 Front edge support pipe 26a Surface fastener 27 Rear edge support pipe 31 Seat back 33 Engagement hook 41 Seat skin 41a Extension part 41d Extension part 42 Reinforcement tape 42a Engagement hole 43 Coil spring 43a Hook 43b Hook

Claims (4)

A seat cushion having a seat cushion covered with a seat cover is placed on the seat cushion receiver, and a seat back that is separate from the seat cushion is detachably provided on a rear upper portion of the seat cushion receiver. The structure of
The seat cover is provided with an extension extending from the rear edge of the upper surface of the seat cushion stuffing,
There is provided a pulling means that is positioned behind the detachable seat back and elastically pulls the extended portion of the seat skin toward the rear upward from substantially horizontal , independently of the seat back. The structure of the vehicle seat cushion characterized by this.   A fixing member for a leg base that supports the seat cushion receiver or a locking member that is locked to a vehicle fixing member is attached to an edge of the extension portion of the seat cover, and the engagement portion of the extension portion is attached. A slack portion is provided between the stop member and the seat cushion stuffing, and the tension means is an elastic member attached to the slack portion and acting in the direction of narrowing the gap between the locking member and the seat cushion stuffing. The structure of the vehicle seat cushion according to claim 1. The pulling means is stretched between an end edge portion of the extension portion of the seat skin and a fixing member of a leg base or a fixing member of a vehicle, which is located behind the seat back and supports the seat cushion receiver. The structure of the vehicle seat cushion according to claim 1, wherein the structure is an elastic member.   The elastic member is a bent leaf spring having a Ω-shaped cross section along the edge of the extended portion of the seat skin, and the slack portion is housed in the Ω-shaped space of the bent leaf spring, The structure of the vehicle seat cushion according to claim 2, wherein the seat cushion stuffing side portion and the fixing member side portion of the slack portion are fixed to both free edge portions of the bent leaf spring.

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