Airbag inflator x-ray inspection apparatus with rotating entry and exit doors

• US 5,740,221 A
• Filed: 10/29/1996
• Issued: 04/14/1998
• Est. Priority Date: 10/29/1996
• Status: Expired due to Term

• Current Assignee: Autoliv ASP Incorporated (Autoliv Incorporated)
• Original Assignee: Morton International Incorporated (Autoliv Incorporated)
• Inventors: Hill, Michael J., Baxter, Brian L., Norman, Kerry J., Fowler, Kenneth D., Sagers, Daren L., England, Jeffery P.
• Primary Examiner(s): WONG, DON KITSUN
• Application Number:
  US08/738,627
• Time in Patent Office: 532 Days
• Field of Search: 378/57, 378/58, 378/68, 378/69
• US Class Current: 378/58
• CPC Class Codes: G01N 23/04 and forming images of the material

Abstract

An x-ray inspection apparatus designed for safe, efficient, simple and rapid inspection of assembled automotive airbag inflators to detect the presence of defects in construction. The apparatus includes a lead-lined cabinet having spaced apart entry and exit openings and a central inspection space intermediate thereto which houses a continuous source of x-rays and an x-ray visual imaging system for converting x-radiation into a visible image that can be compared to a standard in order to determine whether the inflator has been properly constructed. The apparatus also includes a conveyor for moving inflators into and out of the x-ray cabinet. The entry and exit sections of the x-ray cabinet are sealed with respective single rotating doors. Each rotating door includes a rotatable cylindrical drum having only one opening in the sidewall of the drum configured to receive an inflator. The rotatable drum is housed in a separate lead-lined door cabinet attached to respective entry and exit sections of the x-ray cabinet. The door cabinet includes two spaced sidewalls having openings formed therein which are configured to receive an inflator. In operation, when the entry door is positioned upstream, an inflator enters the drum and is stopped in the interior of the drum. The drum door then rotates 180° with the door opening in the downstream position and the inflator is released and exits the door to the inside of the x-ray cabinet. The exit door works in the same manner. The rotary doors effectively seal x-radiation from exiting the x-ray cabinet into the surrounding area in all rotative positions, thereby effectively shielding line workers from harmful x-radiation during x-ray and transfer operations.

Claims

1. An article x-ray inspection apparatus, which comprises:

an x-ray impermeable housing defining an interior chamber having spaced apart entry and exit openings and an x-ray inspection section intermediate thereto;

an x-ray source disposed inside said interior chamber and positioned so as to direct x-ray beams at an article in said inspection section;

a visual imager disposed inside said interior chamber and positioned so as to receive said x-ray beams and convert said x-ray beams into a visual image;

a conveyor extending through said entry and exit openings and said inspection section to transport said article into and out of said interior chamber; and

,

rotatable entry and exit doors rotatably mounted respectively across said entry and exit openings to substantially prevent escape of x-ray beams from the interior chamber to an exterior of said housing while permitting said article to be conveyed into and out of said interior chamber,

each rotatable door comprising an x-ray impermeable rotatable drum having a hollow interior cavity and one opening along a sidewall thereof leading into said interior cavity, said one drum opening being generally configured to receive said article, said one drum opening being rotatably alignable in a first position so as to enable open communication between said exterior of said housing and the interior cavity in said drum, and said one drum opening being rotatably alignable in a second position so as to enable open communication between said interior chamber and the interior cavity in said drum.

2. The apparatus of claim 1, in which said article is an airbag inflator.

3. The apparatus of claim 1, in which said drum is cylindrical.

4. The apparatus of claim 1, in which said x-ray impermeable housing comprises a lead-lined metal housing.

5. The apparatus of claim 1, in which said x-ray impermeable drum comprises a lead-lined metal drum.

6. The apparatus of claim 1, in which said rotatable door comprises a cylindrical drum having a closed top wall, an open bottom wall, and a side wall with one opening.

7. The apparatus of claim 6, in which a motorized shaft is mounted to said top wall of said drum to drive said drum between said two rotative positions.

8. The apparatus of claim 1, in which said x-ray source continuously operates without having x-ray beams escape from the interior chamber during article transfer in and out of said interior chamber.

9. The apparatus of claim 1, in which said visual imager comprises a fluoroscopic screen to receive and convert said x-ray beams to a visual image and an visual imaging monitor to display said images for detection of defects.

10. An article x-ray inspection apparatus, which comprises:

an x-ray impermeable housing defining an interior chamber having spaced apart opened entry and exit sections and an x-ray inspection section intermediate thereto;

an x-ray source disposed inside said interior chamber and positioned so as to direct x-ray beams at an article in said inspection section;

a visual imager disposed inside said interior chamber and positioned so as to receive x-ray beams and convert said x-ray beams into a visual image;

a conveyor extending through a lower portion of said entry and exit sections and a lower portion of said inspection section to transport said article into and out of said interior chamber; and

,

motorized rotatable entry and exit doors respectively closing said opened entry and exit sections to substantially prevent escape of x-ray beams from the interior chamber to an exterior of said housing while permitting said article to be conveyed into and out of said chamber,

each rotatable door comprising an x-ray impermeable door housing mounted to respective opened entry and exit sections,

said door housing having two spaced opposed side walls, each side wall having one opening configured to receive said article therethrough and having said conveyor extend through a lower portion thereof, one of said opposed side walls being disposed across said respective entry and exit sections and the other of said opposed side walls being disposed more remote from said entry and exit sections, and a rotatable drum door rotatably mounted between said opposed side walls across said openings thereof, said drum door being positioned immediately above said conveyor,

said rotatable drum door comprising an x-ray impermeable rotatable drum having a hollow interior cavity and one opening along a sidewall thereof leading into said interior cavity, said one drum opening being generally configured to receive said article therethrough, said one drum opening being rotatably alignable in a first position coincident with said one of said two opposed side wall openings in said door housing so as to enable open communication between said exterior of said housing and the interior cavity in said drum, and said one drum opening being rotatably alignable in a second position coincident with said other of said two side wall openings in said door housing so as to enable open communication between said interior chamber and the interior cavity in said drum.

11. The apparatus of claim 10, in which said article is an airbag inflator.

12. The apparatus of claim 10, in which said drum is cylindrical.

13. The apparatus of claim 10, in which said x-ray impermeable housing comprises a lead-lined metal housing.

14. The apparatus of claim 10, in which said x-ray impermeable door housing comprises a lead-lined metal housing.

15. The apparatus of claim 10, in which said x-ray impermeable drum comprises a lead-lined metal drum.

16. The apparatus of claim 10, in which said rotatable door comprises a cylindrical drum having a closed top wall, an open bottom wall, and a side wall with one opening.

17. The apparatus of claim 16, in which a motorized shaft is mounted to said top wall of said drum to drive said drum between said two rotative positions.

18. The apparatus of claim 10, in which said x-ray source continuously operates without having x-ray beams escape from the interior chamber during article transfer in and out of said interior chamber.

19. The apparatus of claim 10, in which said visual imager comprises a fluoroscopic screen to receive and convert said x-ray beams to a visual image and an visual imaging monitor to display said images for detection of defects in construction.

20. The apparatus of claim 10, in which said first and second rotatable positions are about 180°

apart.

21. A rotating door assembly for an article inspection apparatus, which comprises:

an x-ray impermeable enclosure defining an interior chamber having two spaced apart opposed side walls, each of said opposed side walls having one opening formed therein configured to receive an article;

a motorized rotatable drum door rotatably mounted in said interior chamber between said opposed side walls across said openings thereof;

said rotatable drum door comprising an x-ray impermeable rotatable drum having a hollow interior cavity and one opening along a sidewall thereof leading into said interior cavity, said one drum opening being generally configured to receive said article, said one drum opening being rotatably alignable in a first position coincident with said first side wall opening in said door enclosure so as to enable open communication between said exterior of said door enclosure and the interior cavity in said drum, and said one drum opening being rotatably alignable in a second position coincident with said other opposed side wall opening in said door enclosure so as to enable open communication between said opposed exterior of said door enclosure and the interior cavity in said drum; and

,

said rotating door assembly being mounted to entry port, exit port, or both of an article x-ray inspection apparatus.

22. The apparatus of claim 21, in which said first and second rotatable positions are about 180°

apart.