Shedding mechanism comprising a level adjustment device and weaving machine including said mechanism

Patent metadata

Field	Value
Publication number	US-9873961-B2
Application number	US-201615334534-A
Country	US
Kind code	B2
Filing date	Oct 26, 2016
Priority date	Oct 29, 2015
Publication date	Jan 23, 2018
Grant date	Jan 23, 2018

Abstract

A weaving machine ( 1 ) equipped with a level adjustment device ( 8 ) for a plurality of oscillating levers ( 26 ), the oscillating levers being provided with cam followers ( 42 ) and mounted on a shaft ( 28 ) of the levers, the shaft of the levers being movable between a weaving configuration, where the cam followers of the oscillating levers bear against cams ( 18 ) of the shedding mechanism, and a level adjustment configuration, where the cam followers of the oscillating levers are separated from the cams of the shedding mechanism. The level adjustment device comprises a level adjustment picking cam member secured to the shaft of the levers. The shedding mechanism further comprises a pad translatable along a fixed axis (X 66 ) between a first position corresponding to the weaving configuration of the shaft ( 28 ) of the levers ( 26 ) and a second position corresponding to the level adjustment configuration of the shaft of the levers, and at least one level adjustment connecting rod ( 60 ) including a first end ( 84 ) mounted pivoting on the level adjustment picking cam member around an axis (X 84 ) of the connecting rod parallel to the central axis (X 28 ) of the shaft of the levers and a second end ( 86 ) mounted pivoting on the pad around an articulation axis (X 86 ) of the pad parallel to the axis of the shaft of the levers.

First claim

The invention claimed is:

1. A shedding mechanism for a weaving machine equipped with a level adjustment device for a plurality of oscillating levers, the oscillating levers being provided with cam followers and mounted on a shaft of the levers, the shaft of the levers being movable between:
a weaving configuration, where the cam followers of the oscillating levers bear against cams of the shedding mechanism, and
a level adjustment configuration, where the cam followers of the oscillating levers are separated from the cams of the shedding mechanism,
the level adjustment device comprising a level adjustment picking cam member secured to the shaft of the levers, and
wherein the shedding mechanism further comprises:
a pad translatable along a fixed axis between a first position corresponding to the weaving configuration of the shaft of the levers and a second position corresponding to the level adjustment configuration of the shaft of the levers, and
at least one level adjustment connecting rod including a first end mounted pivoting on the level adjustment picking cam member around an axis of the connecting rod parallel to the central axis of the shaft of the levers and a second end mounted pivoting on the pad around an articulation axis of the pad parallel to the axis of the shaft of the levers.

2. The shedding mechanism according to claim 1 , wherein the translation axis of the pad is perpendicular to the articulation axis of the level adjustment connecting rod on the pad.

3. The shedding mechanism according to claim 2 , wherein, in the weaving configuration,
an orthogonal projection, in a projection plane perpendicular to the central axis of the shaft of the levers, of a longitudinal axis of the level adjustment connecting rod that perpendicularly connects the axis of the level adjustment connecting rod and the articulation axis of the pad, and
an orthogonal projection, in the same projection plane, of an axis that perpendicularly connects the axis of the level adjustment connecting rod and the central axis of the shaft of the levers,

define a first angle, the value of which is comprised between 80° and 100°.

4. The shedding mechanism according to claim 3 , wherein the value of the first angle is equal to 90°, to within 2°.

5. The shedding mechanism according to claim 2 , wherein, in the weaving configuration,
an orthogonal projection, in a projection plane perpendicular to the axis of the shaft of the levers, of the translation axis of the pad, and
an orthogonal projection, in the same projection plane, of a longitudinal axis of the level adjustment connecting rod that perpendicularly connects the axis of the level adjustment connecting rod and the articulation axis of the pad

define, in the movement plane, a second angle of the picking cam member whereof the value is comprised between 90° and 110°, this second angle being defined on the side of the travel of the pad when it is in the weaving configuration.

6. The shedding mechanism according to claim 5 , wherein the value of the second angle is equal to 95° to within 2°.

7. The shedding mechanism according to claim 1 , wherein the shaft of the levers is:
guided in translation at each of its ends by a guide slot defined in a platen, and
translatable along an axis of each guide slot, between the weaving configuration and the level adjustment configuration.

8. The shedding mechanism according to claim 7 , wherein it further comprises:
a side arm secured to the shaft of the levers and rotatable around the central axis of the shaft of the levers between a first angular position corresponding to the weaving configuration of the shaft of the levers and a second angular position corresponding to the level adjustment configuration of the shaft of the levers, and
at least one connecting rod mounted pivoting on the level adjustment picking cam member at one end of the arm around an axis of the arm and mounted pivoting on a frame of the shedding mechanism around an axis of the frame and movable between a third position corresponding to the weaving configuration of the shaft of the levers and a fourth position corresponding to the level adjustment configuration of the shaft of the levers.

9. The shedding mechanism according to claim 8 , wherein when the connecting rod is in the third position, the center distance between the axis of the arm and the axis of the frame is equal to a first value, and when the connecting rod is in the fourth position, this center distance is equal to a second value, the first value being greater than the second value.

10. The shedding mechanism according to claim 1 , wherein:
the level adjustment picking cam member is rotatable around a fixed axis,
the central axis of the shaft of the levers is parallel to and does not coincide with the rotation axis of the level adjustment picking cam member, and
the shaft of the levers is rotatable around the rotation axis of the level adjustment picking cam member between the weaving configuration and the level adjustment configuration.

11. The mechanism according to claim 10 , wherein the level adjustment picking cam member comprises an arm rotatable around the fixed axis, the arm extending parallel to the central axis of the shaft of the levers and securing the shaft of the levers in rotation with the level adjustment picking cam member eccentrically relative to the fixed axis.

12. The mechanism according to claim 10 , wherein the level adjustment picking cam member is directly fixed eccentrically to the shaft of the levers.

13. The shedding mechanism according to claim 1 , wherein the level adjustment picking cam member is a level adjustment lever that comprises at least one arm mounted pivoting on the axis of the level adjustment connecting rod and a central portion secured in rotation with the shaft of the levers.

14. The shedding mechanism according to claim 1 , wherein the pad is a tapped nut that is mounted on a threaded rod rotatable around the axis of the pad.

15. The shedding mechanism according to claim 14 , wherein threaded rod is rotated around the axis of the pad by an electric motor fixed on a frame of the shedding mechanism.

16. The shedding mechanism according to claim 1 , wherein the pad is submerged in a lubricating oil bath of a frame of the shedding mechanism.

17. A weaving machine including a shedding mechanism, wherein the shedding mechanism is according to claim 1 .

Assignees

• Staubli Sa Ets

Inventors

• Cittadini Joseph
• Bonneau David

Classifications

• D03C5/02 Primary

  operated by rotating cams · CPC title

• D03C5/005 Primary

  Leveling mechanisms · CPC title

• D03C1/142

  Leveling mechanisms · CPC title

• D03C5/00 Primary

  Cam or other direct-acting shedding mechanisms, i.e. operating heald frames without intervening power-supplying devices · CPC title