Method and apparatus for measuring a vehicle seat H-point

• US 5,456,019 A
• Filed: 04/20/1994
• Issued: 10/10/1995
• Est. Priority Date: 04/20/1994
• Status: Expired due to Fees

• Current Assignee: Lear Seating Corp. (Lear Corporation)
• Original Assignee: Lear Seating Corp. (Lear Corporation)
• Inventors: Hamilton, Joseph A., Dowell, Robert J.
• Primary Examiner(s): Fulton, Christopher W.
• Application Number:
  US08/230,477
• Time in Patent Office: 538 Days
• Field of Search: 33/600, 33/608, 33/1 M, 33/1 BB, 33/503, 33/533, 33/645, 33/549, 33/555, 33/511, 33/512, 33/515, 33/572, 33/573
• US Class Current: 33/600
• CPC Class Codes: G01B 5/0025 Measuring of vehicle parts G01B5/003 takes precedence
• CPC Class Codes: G01B 5/004 for measuring coordinates of points

Abstract

A method and apparatus for measuring the coordinates of a vehicle seat hip pivot axis, or H-point, including a vehicle seat assembly (10) supported on a support structure (30). The support structure (30) having x and z coordinate grid lines and an alignment pick-up bar (82) for aligning the seat (10) along predetermined x and z coordinate grid lines. A seat occupant simulating manikin (32) is positioned on the seat (10) for defining the vehicle seat hip pivot axis. Measuring device (92) for aligning and measuring the hip pivot axis, or H-point, includes a guide (120) fixedly supported at predetermined x,z coordinates on the support structure (30) for guiding a housing member (94) along an x-axis. A telescoping member (96) slidably extends from the housing member (94) along a y-axis and a measuring pointer (108) extends from the telescoping member (96) along a z-axis to align with and measure the hip pivot axis, or H-point, on the manikin.

Claims

1. An apparatus for measuring the coordinates of a vehicle seat hip pivot axis comprising:

support means (66) for supporting a vehicle seat (10), said support means (66) having a plurality of parallel z-coordinate grid lines extending longitudinally between first (72) and second (74) ends of said support means (66) and a plurality of parallel x-coordinate grid lines extending perpendicular to said z-coordinate grid lines between forward (76) and rearward (78) ends of said support means (66);

alignment means (80) fixedly connected to said supported means (66) adjacent to said forward end (76) of said support means (66) for aligning the vehicle seat (10) at a predetermined position along said x-coordinate grid lines on said support means (66);

securing means (88) for fixedly securing the vehicle seat (10) at a predetermined position along said z-coordinate grid lines on said support means (66);

measuring means (92) for measuring the coordinates of the vehicle seat hip pivot axis, said measuring means (92) including housing means (94) for housing a telescoping member (96) telescopically slidable along a generally vertical y-axis perpendicular to each of said x-coordinate and z-coordinate grid lines, and a measuring pointer (108) slidably coupled to said telescoping member (96) and moveable along a z-axis parallel with said z-coordinate grid lines to align with the vehicle seat hip pivot axis;

and guide means (120) extending longitudinally along a predetermined x-coordinate grid line and having first (122) and second (124) ends fixedly connected to said support means (66) and extending between spaced apart predetermined z-coordinate grid lines defining an x-axis adjacent to and spaced from at least one side of said predetermined seat position defined by said securing means (88) for guiding said measuring means (92) adjacent to the side of said predetermined seat position along said x-axis to align with and measure the coordinates of the vehicle seat hip pivot axis.

2. An apparatus as set forth in claim 1 further characterized by said alignment means (80) including an L-shaped brace member (82) fixedly secured to said support means (66) and extending longitudinally along said z-coordinate grid lines between said first (72) and second (74) ends of said support means (66).

3. An apparatus as set forth in claim 2 further characterized by said guide means (120) including at least one L-shaped track member (126) having an upright leg (128) extending between said first (122) and second (124) ends and fixedly mounted to said support means (66) and a generally horizontal leg (130) extending from said upright leg (128) toward said predetermined seat position defined by said securing means (88) and spaced above said support means (66) providing a continuous guide track (132) defined between said upright leg (128), said horizontal leg (130) and said support means (66) for receivably guiding said measuring means (92) along said x-axis on said support means (66).

4. An apparatus as set forth in claim 3 further characterized by said measuring means (92) including a base member (116) slidably received in said guide track (132) and moveable along said x-axis on said support means (66).

5. An apparatus as set forth in claim 4 further characterized by said housing means (94) including a housing member (98) fixedly supported on said base member (116) and having a front face (100) in sliding contact with said horizontal leg (130) of said track member (126).

6. An apparatus as set forth in claim 5 further characterized by said housing member (98) having a U-shaped channel (104) for slidably receiving said telescoping member (96) and providing movement along said y-axis.

7. An apparatus as set forth in claim 6 further characterized by said telescoping member (96) including an aperture (106) for slidably receiving said measuring pointer (108) therethrough.

8. An apparatus as set forth in claim 7 further characterized by said measuring pointer (108) including a cylindrical rod having first (110) and second (112) ends, said first end (110) including a stopper (114) to prevent said rod from passing through said aperture (106) in said telescoping member (96) and said second end (112) including a tapered conical pointer (115) to align with the vehicle seat hip pivot axis.

9. An apparatus as set forth in claim 8 further characterized by including locking means (134) for securely locking said measuring means (92) in said aligned position with the vehicle seat hip pivot axis.

10. An apparatus as set forth in claim 9 further characterized by said support means (66) including a support platform (68) having an upper support surface (70), said x-coordinate and said z-coordinate grid lines etched into said upper support surface (70) forming a predetermined x, z-coordinate measuring scale.

11. An apparatus as set forth in claim 10 further characterized by said L-shaped brace member (82) including an upright leg platform (84) fixedly secured to said support platform (68) and a generally horizontal leg portion (86) extending from said upright leg portion (84) and spaced above said support platform (68) providing an alignment channel (87) therebetween.

12. An apparatus as set forth in claim 11 further characterized by including a vehicle seat (10), said seat (10) including a generally horizontal seat portion (12) and a generally upright backrest portion (14) pivotally coupled to said seat portion (12).

13. An apparatus as set forth in claim 12 further characterized by including a seat track riser (18, 20) operatively connected to said seat portion (12) and receivably supported on said support means (66) .

14. An apparatus as set forth in claim 13 further characterized by said seat track riser (18, 20) including forward (22) and rearward (24) extended arms, said forward extended arms (22) received in said alignment channel (87) for aligning said vehicle seat (10) in said predetermined x, z-coordinate position on said support means (66).

15. An apparatus as set forth in claim 14 further characterized by said seat track riser arms (22, 24) including apertures (26) therethrough and said securing means (88) including a plurality of pins (89, 91) received through said apertures (26) and into said support platform (68) to secure said vehicle seat (10) in said predetermined position.

16. An apparatus as set forth in claim 15 further characterized by including simulation means (32) supported on said vehicle seat (10) for simulating a vehicle seat occupant and establishing the vehicle seat hip pivot axis.

17. An apparatus as set forth in claim 16 further characterized by said simulation means (32) including an adjustable seat occupant manikin having a lower trunk portion (34) and an upper torso portion (36), said trunk portion (34) and said torso portion (36) connected by a hip pivot (51) defining a vehicle seat hip pivot axis.

18. A method of measuring the coordinates of a vehicle seat hip pivot axis including the steps of:

supporting a vehicle seat (10) on a support structure (68) having a plurality of x-coordinate and z-coordinate grid lines;

aligning the vehicle seat (10) on the support structure (68) at a predetermined position along the x-coordinate grid lines;

securing the vehicle seat (10) at a predetermined position along the z-coordinate grid lines on the support structure (68);

manipulating a seat occupant simulator (32) on the vehicle seat (10) to establish a vehicle seat hip pivot axis;

positioning and securing a guide member (120) at a predetermined x-coordinate and z-coordinate position adjacent to and spaced from at least one side of the predetermined z-coordinate seat position on the support structure (68);

establishing an x-axis parallel with the x-coordinate grid lines, a z-axis parallel with the z-coordinate grid lines and a y-axis perpendicular to each of the x and z-coordinate grid lines;

adjusting a measuring apparatus (92) along each x, z and y-axis to align with and measure the vehicle seat hip pivot axis;

said adjusting of the measuring apparatus (92) including;

sliding a housing member (98) adjacent and parallel to the side of the predetermined z-coordinate seat position on the support structure (68) and against the guide member (120) to align the measuring apparatus (92) with the vehicle seat hip pivot axis along the x-axis;

extending a telescoping member (96) from the housing member (98) along the y-axis;

extending a measuring pointer (18) from the telescoping member (96) along the z-axis from a position spaced outwardly from the side of the predetermined z-coordinate seat position to a position immediate adjacent the vehicle seat (10) to align the pointer (108) with the vehicle seat hip pivot axis; and

reading the x-coordinate and y-coordinate of the vehicle hip pivot axis from the x and y-coordinate grid lines.

19. The method as set forth in claim 18 further characterized by locking the measuring apparatus (92) in the aligned position with the vehicle seat hip pivot axis.

20. An apparatus for measuring the coordinates of a vehicle seat hip pivot axis comprising:

support means (66) for supporting a vehicle seat (10), said support means (66) having a plurality of parallel z-coordinate grid lines extending longitudinally between first (72) and second (74) ends of said support means (66) and a plurality of parallel x-coordinate grid lines extending perpendicular to said z-coordinate grid lines between forward (76) and rearward (78) ends of said support means (66);

alignment means (80) fixedly connected to said support means (66) adjacent to and spaced between said forward end (76) of said support means (66) and the vehicle seat (10) for aligning the vehicle seat (10) at a predetermined position along said x-coordinate grid lines on said support means (66);

securing means (88) for fixedly securing the vehicle seat (10) in at least one predetermined position along said z-coordinate grid lines on said support means (66);

measuring means (92) for measuring the coordinates of the vehicle seat hip pivot axis, said measuring means (92) including housing means (94) for housing a telescoping member (96) telescopically slidable along a generally vertical y-axis, perpendicular to each of said x-coordinate and z-coordinate grid lines, and a measuring pointer (108) slidably coupled to said telescoping member (96) and moveable along a z-axis parallel with said z-coordinate grid lines to align with the vehicle seat hip pivot axis; and

guide means (120) extending longitudinally along a predetermined x-coordinate grid line and having first (122) and second (124) ends fixedly connected to said support means (66) and extending between spaced apart predetermined z-coordinate grid lines defining an x-axis, said guide means (120) positioned adjacent to and spaced from opposite sides of said predetermined seat position defined by said securing means (88) of the vehicle seat (10) for guiding said measuring means (92) adjacent to one of said opposing sides of said predetermined seat position along said x-axis to align with and measure the coordinates of the vehicle seat hip pivot axis on either of said opposing sides.