JP4921208B2 - Seat cushion for vehicle seat - Google Patents

Description

  More specifically, the present invention relates to a seat cushion for a vehicle seat of a railway, a bus or other vehicle, and a frame-like frame is provided on a pedestal placed on the floor, and a spring structure is provided on the frame-like frame. The present invention relates to a seat cushion for a vehicle seat that is mounted and a cushion pad is placed on top of the spring structure, and the cushion pad is covered with a skin material.

  In recent seat cushions for vehicle seats, a plurality of seating portions are formed in the lateral direction, and in order to securely seat a seating capacity on these seating portions, a concave portion (inverse for one person) is formed on the surface of each seating portion. ) Is formed. As a spring structure below the cushion pads of the plurality of seating portions, one using a coil spring or a substantially S-shaped continuous S-shaped spring is known (for example, see Patent Document 1).

A vehicle having such a plurality of seating portions in the horizontal direction, a horizontally long seat frame provided on a pedestal portion placed on the floor, and a skin material and a cushion pad integrally molded on the upper portion of the seat frame A configuration of a seat cushion of a seat, in which a recess for one person is formed on the surface of each seating portion, is conventionally known (see, for example, Patent Document 2).
Japanese Utility Model Publication No. 06-31964 Japanese Patent Laid-Open No. 06-154061

  However, the conventional spring structure described in Patent Document 1 uses a coil spring or a substantially S-shaped continuous S-shaped spring, and a vertical vibration at the time of sitting is intense, and a seat that is more comfortable to sit on can be obtained. It was something that could not be done. In addition, the seating posture of the seated person cannot be reliably maintained against vertical vibration or roll of the vehicle or the like. In addition, the conventional spring structure using a coil spring is complicated and expensive, and is not economical.

  Further, in the conventional cushion pad described in Patent Document 2, since the skin material and the cushion pad are integrally molded in a seat unit for each person, each seat for each person can be visually or satisfactorily seated. Although the unit position (partition) can be clearly recognized, the integral molding process is complicated, the molding apparatus cannot be increased in size, and the integral molded product is weakened due to deterioration over time. In sitting, it gives the seated person a sense of incongruity. In addition, in the seat cushion of the vehicle seat disposed along the side wall of the vehicle as a vehicle seat, the lateral movement of the occupant increases due to acceleration / deceleration of the vehicle, and the center part of the seat cushion sinks greatly. Was.

  The present invention has been made by paying attention to the unsolved problems of the above-described conventional example, and can clearly recognize the position of each seat unit for each person, without using a coil spring for the spring structure. The seating posture of the occupant can be reliably maintained against vibration and rolling, the cushion pad can be easily molded, and the cushion pad and spring structure are less susceptible to weakening due to aging. The seat cushion does not give a sense of incongruity due to the material and spring structure, and there is no risk that the center of the seat cushion will sink significantly. An object of the present invention is to provide a seat cushion for a vehicle seat that is easy to assemble, can be easily maintained such as parts replacement, and is excellent in economy.

In order to achieve the above object, a seat cushion for a vehicle seat according to claim 1 of the present invention is provided with a frame-like frame on a pedestal placed on a floor, and a spring structure is attached to the frame-like frame. In a seat cushion of a vehicle seat in which a cushion pad is placed on top of the spring structure and the cushion pad is covered with a skin material,
The spring structure is a linear I-shaped spring attached in the lateral direction of the frame-shaped frame, and is disposed below the I-shaped spring, the central portion is refracted into a substantially Z-shape, and both end portions Is attached in the front-rear direction of the frame-like frame , and has a Z-shaped spring with a central portion protruding upward as viewed from the side, and the upper portion of the Z-shaped spring is bound to an I-shaped spring. It is characterized by being.

According to a second aspect of the present invention, there is provided a seat cushion for a vehicle seat, wherein a frame-like frame is provided on a pedestal portion placed on a floor, and a spring structure is attached to the frame-like frame. In a seat cushion of a vehicle seat in which a cushion pad is placed on the top of the vehicle and the cushion pad is covered with a skin material,
The spring structure has a substantially S-shaped continuous S-shaped spring attached to extend in the front-rear direction of the frame-shaped frame, and is disposed below the S-shaped spring, with a central portion having a substantially Z-shape. A Z-shaped spring that is refracted and has both end portions attached in the front-rear direction of the frame-like frame , and a central portion that is convex upward as viewed from the side, and the upper portion of the Z-shaped spring is S-shaped It is characterized by being bound to a spring.

Further, in the seat cushion of the vehicle seat according to claim 3 of the present invention, a frame-like frame is provided on a pedestal portion placed on the floor, and a spring structure is attached to the frame-like frame, and the spring structure In a seat cushion of a vehicle seat in which a cushion pad is placed on the top of the vehicle and the cushion pad is covered with a skin material,
The spring structure is attached to extend in the front-rear direction of the frame-shaped frame, and is disposed below the I-shaped spring, and is attached to the frame-shaped frame. A substantially S-shaped continuous S-shaped spring, a lower part of the S-shaped spring, a central portion that is refracted into a substantially Z-shape when viewed from above, and both ends of the frame-shaped frame A Z-shaped spring attached to the frame and having a centrally convex shape when viewed from the side, and the S-shaped spring and the Z-shaped spring are bound to the I-shaped spring It is characterized by.

According to a fourth aspect of the present invention, there is provided a seat cushion for a vehicle seat according to the third aspect of the present invention, wherein the seat cushion has a plurality of seating portions in a lateral direction and corresponds to the plurality of seating portions. Recesses for the number of seated persons are formed, the Z-shaped springs are arranged corresponding to both side portions of the recesses of the seating parts, bases are formed at both ends of the Z-shaped springs, and at least the frame-shaped frame The front and rear frames are formed in a substantially U-shaped cross section, and bases at both ends of the Z-shaped spring are placed and attached to the lower part of the front and rear frames.

  According to the seat cushion of the vehicle seat of the present invention, the Z-shaped spring can prevent the seating portion from sinking, and can securely hold the seated person's waist, and reliably against vertical vibration and rolling. The seating posture of the seated person can be maintained, the cushion pad and spring structure are less weakened due to aging, the seated person is not discomforted, and vibration is minimized even if the passenger sits in the adjacent seat As a result, the assembly work is easy and maintenance such as part replacement can be easily performed, and the effect of improving the economy can be obtained.

Hereinafter, a seat cushion of a vehicle seat according to the present invention will be described with reference to the drawings.
1 to 4 show a seat cushion of a vehicle seat according to the present invention. FIG. 1 is a schematic sectional view of the seat cushion, FIG. 2 is an explanatory side view of a spring structure, and FIG. FIG. 3B is a side view of the Z-shaped spring, FIG. 4A is a partial plan view of the seat cushion in which a plurality of seating portions are formed in the lateral direction, and FIG. (B) is a partial plane explanatory view of the spring structure of the seat cushion in which a plurality of seating portions are formed in the lateral direction. In the present embodiment, the present invention is applied to a seat cushion of a railway vehicle seat in which a plurality of seating portions are formed in the lateral direction. The present invention can be similarly applied to passenger seats and other vehicle seat cushions.

  As shown in FIG. 1, a seat cushion 1 for a vehicle seat has a plurality of seating portions 2 in the lateral direction in the present embodiment, and a horizontally long frame-like frame 3 is attached to and detached from a pedestal portion 2 placed on the floor. It is provided as possible. The horizontally long frame-like frame 3 is formed to have a predetermined length corresponding to the number of seats 4, for example, 1 person, 2 persons, 3 persons, 4 persons, 7 persons. The frame-like frame 3 has a substantially U-shaped cross section and includes an upper part 3a, a lower part 3b, and a stopper 3c. A stopper 3c of the frame-like frame 3 is detachably attached to the pedestal portion 2 placed on the floor. The frame-like frame 3 can be formed in a substantially L-shaped cross section obtained by deforming the upper part 3a.

  A spring structure 5 is attached to the frame-shaped frame 3, and a cushion pad 7 formed of artificial fiber, cotton, polyester, urethane, or the like via a waterproof sheet, a spring receiving sheet, or the like on the spring structure 5. Is placed. This cushion pad 7 is covered with a skin material 9. As shown in FIG. 4A, the cushion pad 7 and the skin material 9 are formed with concave portions 4a corresponding to a plurality of seating portions 4 as inverse shapes corresponding to the number of seated people.

  As shown in FIGS. 2 and 4B, the spring structure 5 includes an I-shaped spring 11 made of a straight brace wire stretched in the lateral direction of the frame-shaped frame 3 and the I-shaped spring 11. A substantially S-shaped continuous S-shaped spring 13 disposed below and attached to the frame-shaped frame 3 so as to extend in the front-rear direction, and a Z-shaped spring disposed below the S-shaped spring 13 15. Since the I-shaped spring 11 and the S-shaped spring 13 are provided close to each other, the vertical position can be reversed.

  Both ends of the I-shaped spring 11 are attached to the upper part 3a of the side frame of the frame-like frame 3, and both ends of the S-shaped spring 13 are attached to the upper part 3a of the front and rear frames. A horizontal portion 14 is formed at an intermediate portion forming the S-shape of the S-shaped spring 13. Further, the upward biasing force can be improved by forming the S-shaped spring 13 by bending it upward in a convex shape when viewed from the side. In addition, the thickness of each spring which comprises the said spring structure 5 can be set suitably.

  As shown in FIGS. 3A and 3B, bases 16 are formed at both ends of the Z-shaped spring 15 by being bent by approximately 90 ° with respect to the longitudinal direction, and the bases 16 at both ends of the Z-shaped spring 15 are formed. Is mounted in a free state on the lower part 3b of the front and rear frames of the frame-like frame 3. By making the bases 16 at both ends of the Z-shaped spring 15 in a free state, it can swing up and down, and maintenance can be performed easily. The base portion 16 may be attached to the lower portion 3b of the front and rear frame in a pivotally supported state or in a fixed state.

  In addition, inclined portions 17 are formed on the front and rear sides of the Z-shaped spring 15 so as to extend upward from the base portions 16 at both ends of the Z-shaped spring 15 to a position close to the lower portion of the S-shaped spring 13. A central portion 18 is formed. The central portion 18 is refracted in a substantially Z shape when seen from the plane. The central portion 18 includes a horizontal portion 19 before and after forming a Z-shape, and a diagonal portion 20 provided diagonally between the horizontal portions 19.

  As shown in FIG. 3B, the Z-shaped spring 15 is formed in a substantially trapezoidal shape with the central portion 18 protruding upward as seen from the side surface due to the presence of the inclined portion 17. Note that the Z-shaped spring 15 can also be formed as an upwardly convex curved shape. When a load is applied to the Z-shaped spring 15 from above, the load deforms the central portion 18 and is transmitted to the lower portions 3b of the front and rear frames from the base portions 16 at both ends via the front and rear inclined portions 17. .

  A horizontal portion 14 of the S-shaped spring 13 and a horizontal portion 19 of the Z-shaped spring 15 of the spring structure 5 are bound to the I-shaped spring 11 by a binding member 21. Note that the S-shaped spring 13 of the spring structure 5 may be omitted, and the Z-shaped spring 15 may be bound to the I-shaped spring 11 by the binding member 21. The spring force of these I-shaped spring 11, S-shaped spring 13 and Z-shaped spring 15 is added up.

  Alternatively, the I-shaped spring 11 may be omitted and the Z-shaped spring 15 may be bound to the S-shaped spring 13 by the binding member 21. Furthermore, although the Z-shaped spring 15 is attached between the lower portions 3b of the front and rear frames, it may be attached between the left and right frames. Further, the positions where the binding members 21 bind are preferably parallel to each other, but may be crossed.

  As shown in FIGS. 4A and 4B, the position of each seat unit is clearly recognized corresponding to the plurality of seating portions 4 of the seat cushion 1 in which a plurality of seating portions 4 are formed in the lateral direction. In order to be able to do so, the cushion pad 7 and the skin material 9 are formed with recesses 4a as inverse shapes corresponding to the number of seated persons.

  In this embodiment, two spring structures 5 of the recesses 4a of the seating portion 4 are provided at positions corresponding to the left and right side portions in each seat unit, and two S-shaped springs 13 are provided in the present embodiment. 6 I-shaped springs 11 are provided in parallel at substantially equal intervals, and three I-shaped springs 11 are provided in parallel in a direction orthogonal to the longitudinal direction of the Z-shaped spring 15 at appropriate intervals. . The seating posture of the seated person can be reliably maintained against vertical vibrations and rolls by the Z-shaped springs 15 at positions corresponding to the recesses 4a of the seating part 4 and the left and right side parts.

  The Z-shaped spring 15 enhances the cushioning hardness of the left and right side portions of the seating portion 4. For this reason, a seated person can sit in the center part of the seating part 4 without a sense of incongruity, and a seated person's waist | hip | lumbar part is supported stably. The thickness, shape, number of attachments, attachment direction, and the like of the I-shaped spring 11, S-shaped spring 13 and Z-shaped spring 15 can be appropriately changed. For example, the Z-shaped springs 15 are provided at equal intervals. You can also.

  The Z-shaped spring 15 prevents the seating portion 4 from sinking, and can securely hold the seater's waist, and the presence of the recess 4a ensures the seating posture of the seater against vertical vibration and rolling. The cushion pad 7 and the spring structure 5 are less weakened due to deterioration over time, so that the seated person does not feel uncomfortable and the vibration is minimized even if the passenger sits on the adjacent seating part 4. Can be suppressed.

It is a schematic sectional drawing of the seat cushion of the vehicle seat which concerns on this invention. It is side explanatory drawing of the spring structure of the seat cushion of the vehicle seat which concerns on this invention. The Z-shaped spring of the seat cushion of the vehicle seat which concerns on this invention is shown, (a) is plane explanatory drawing, (b) is side explanatory drawing. FIG. 2 shows a plurality of seating portions of a seat cushion of a vehicle seat according to the present invention, wherein (a) is a partial plan view of the seat cushion and (b) is a partial plan view of a spring structure.

  DESCRIPTION OF SYMBOLS 1 ... Seat cushion, 2 ... Base part, 3 ... Frame-like frame, 3a ... Upper part, 3b ... Lower part, 3c ... Fastening metal fitting, 4 ... Seating part, 4a ... Recessed part, 5 ... Spring structure, 7 ... Cushion pad, 9 ... skin material, 11 ... I-shaped spring, 13 ... S-shaped spring, 14 ... horizontal portion, 15 ... Z-shaped spring, 16 ... base portion, 17 ... inclined portion, 18 ... central portion, 19 ... horizontal portion, 20 ... Diagonal part, 21 ... Bundling member

Claims (4)

A frame-like frame is provided on the pedestal placed on the floor, a spring structure is attached to the frame-like frame, a cushion pad is placed on top of the spring structure, and the cushion pad is covered with a skin material In the seat cushion of the vehicle seat
The spring structure is a linear I-shaped spring attached in the lateral direction of the frame-shaped frame, and is disposed below the I-shaped spring, the central portion is refracted into a substantially Z-shape, and both end portions Is attached in the front-rear direction of the frame-like frame , and has a Z-shaped spring with a central portion protruding upward as viewed from the side, and the upper portion of the Z-shaped spring is bound to an I-shaped spring. A seat cushion for a vehicle seat. A frame-like frame is provided on the pedestal placed on the floor, a spring structure is attached to the frame-like frame, a cushion pad is placed on top of the spring structure, and the cushion pad is covered with a skin material In the seat cushion of the vehicle seat
The spring structure has a substantially S-shaped continuous S-shaped spring attached to extend in the front-rear direction of the frame-shaped frame, and is disposed below the S-shaped spring, with a central portion having a substantially Z-shape. A Z-shaped spring that is refracted and has both end portions attached in the front-rear direction of the frame-like frame , and a central portion that is convex upward as viewed from the side, and the upper portion of the Z-shaped spring is S-shaped A seat cushion for a vehicle seat, wherein the seat cushion is bound to a spring. A frame-like frame is provided on the pedestal placed on the floor, a spring structure is attached to the frame-like frame, a cushion pad is placed on top of the spring structure, and the cushion pad is covered with a skin material In the seat cushion of the vehicle seat
The spring structure is attached to extend in the front-rear direction of the frame-shaped frame, and is disposed below the I-shaped spring, and is attached to the frame-shaped frame. A substantially S-shaped continuous S-shaped spring, and a lower portion of the S-shaped spring, a central portion is refracted into a substantially Z-shape, and both ends are attached to the front and rear frames of the frame-shaped frame. A Z-shaped spring having a central portion formed in a convex shape when viewed from the side, and the S-shaped spring and the Z-shaped spring are bound to the I-shaped spring. Seat cushion for vehicle seats. A plurality of seating portions are provided in the lateral direction, and recesses for the number of seating are formed corresponding to the plurality of seating portions, and the Z-shaped springs are disposed corresponding to both side portions of the recesses of the seating portions. Bases are formed at both ends of the Z-shaped spring, at least the front and rear frames of the frame-shaped frame are formed in a substantially U-shaped cross section, and the bases at both ends of the Z-shaped spring are placed under the front and rear frames. seat cushion of the vehicle seat according to claim 3, characterized in that attached is.