Claims
- 1. A pre-assembling jig for pre-assembling voussoirs into a substantially part cylindrical panel, comprising a frame provided with a device for supporting webs of the voussoirs, the support device having the general shape of a portion of a cylinder, a bearing device for bearing against walls of the voussoirs, the bearing device having at least one group of bearing means arranged in two parts in two mean planes which are perpendicular to said cylindrical shape and located at a predetermined distance from each other, and spreading device for spreading apart the voussoirs toward the bearing means.
- 2. A jig as claimed in claim 1, comprising a second group of bearing means arranged in two parts in two mean planes which are perpendicular to the cylindrical shape and perpendicular to the mean planes of the first-mentioned group and located at a second predetermined distance from each other.
- 3. A jig as claimed in claim 1, wherein there is a single group of said bearing means, the jig further comprising an aligning device arranged in a mean plane perpendicular to the cylindrical shape and to the mean planes of said group.
- 4. A jig as claimed in claim 1, wherein the support device and the two parts of the group of bearing means of the bearing device are each constituted by a discontinuous series of means.
- 5. A jig as claimed in claim 3, wherein the aligning device is constituted by a discontinuous series of means.
- 6. A jig as claimed in claim 4, wherein each discontinuous series of means comprises a plurality of blocks carrying balls for contacting the voussoirs.
- 7. A jig as claimed in claim 5, wherein the discontinuous series of means comprises a plurality of blocks carrying balls for contacting the voussoirs.
- 8. A jig as claimed in claim 6, wherein the ball blocks are adjustable in position.
- 9. A jig as claimed in claim 7, wherein the ball blocks are adjustable in position.
- 10. A pre-assembling jig for pre-assembling voussoirs into a substantially part cylindrical panel, comprising a frame provided with a device for supporting webs of the voussoirs, the support device having the general shape of a portion of a cylinder, a bearing device for bearing against walls of the voussours, the bearing device having at least one group of bearing means arranged in two parts in two mean planes which are perpendicular to said cylindrical shape and located at a predetermined distance from each other, and a spreading device for spreading apart the voussoirs toward the bearing means, one part of said group of bearing means being fixed with respect to the frame, the other part of the group being withdrawably mounted on the frame.
- 11. A jig as claimed in claim 10, comprising a second group of bearing means arranged in two parts in two mean planes which are perpendicular to the cylindrical shape and perpendicular to the mean planes of the first-mentioned group and located at a second predetermined distance from each other, the withdrawable part of the first-mentioned group being slidably mounted with respect to the frame and the second group of bearing means having two withdrawable parts which are pivotally mounted with respect to the frame.
- 12. A jig as claimed in claim 10, wherein there is a single group of said bearing means, the jig further comprising an aligning device arranged in a mean plane perpendicular to the cylindrical shape and to the mean planes of said group, the withdrawable part of said single group being pivotally mounted with respect to the frame.
- 13. A jig as claimed in claim 10, comprising a cylinder device interposed between the frame and the withdrawable part for shifting the withdrawable part.
- 14. A jig as claimed in claim 11, wherein a cylinder device is interposed between the frame and each withdrawable part for shifting the corresponding withdrawable part.
- 15. A jig as claimed in claim 10, wherein the frame comprises a closed box structure in which are disposed means for shifting the withdrawable parts, the upper face of the box structure carrying the support device.
- 16. A jig as claimed in claim 21, comprising adjustable stop means between the frame and the withdrawable part.
- 17. A jig as claimed in claim 11, comprising adjustable stop means between the frame and each withdrawable part.
- 18. A jig as claimed in claim 3, wherein the frame comprises a support, and a chassis which is carried by the support and inclined with respect to the support at least in the direction perpendicular to the aligning device.
- 19. A jig as claimed in claim 2, wherein the spreading device comprises compressible means and a cover which is movably mounted with respect to the frame and applied against said compressible means.
- 20. A jig as claimed in claim 3, wherein the spreading device comprises a compressible means and a clamping device applied against the compressible means.
- 21. A jig as claimed in claim 2, comprising a sealing device consisting of sealing means arranged on the cylindrical surface of the support device, sealing means arranged in the planes of the bearing means of the bearing device and sealing means applied by a cover.
- 22. A jig as claimed in claim 21, wherein the sealing means arranged on the surface of the support device are inflatable sealing means.
- 23. A jig as claimed in claim 11, comprising a sealing device consisting of a closed sealing means and a clamping frame surrounding the closed sealing means.
- 24. A jig as claimed in claim 23, wherein the frame has elements for slidably guiding the clamping frame in the plane of the sealing means.
Priority Claims (2)
Number |
Date |
Country |
Kind |
73.05727 |
Feb 1973 |
FR |
|
74.03310 |
Jan 1974 |
FR |
|
Parent Case Info
This is a division of application Ser. No. 441,927, filed Feb. 12, 1974, now U.S. Pat. No. 3,946,567.
US Referenced Citations (4)
Number |
Name |
Date |
Kind |
2796095 |
Joseph |
Jun 1957 |
|
2911933 |
Martin et al. |
Nov 1959 |
|
3020867 |
Ballentine et al. |
Feb 1962 |
|
3125054 |
Lach et al. |
Mar 1964 |
|
Divisions (1)
|
Number |
Date |
Country |
Parent |
441927 |
Feb 1974 |
|