Classifications

• • D—TEXTILES; PAPER
  • D03—WEAVING
  • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
  • D03C5/00—Cam or other direct-acting shedding mechanisms, i.e. operating heald frames without intervening power-supplying devices
  • D03C5/02—Cam or other direct-acting shedding mechanisms, i.e. operating heald frames without intervening power-supplying devices operated by rotating cams
• • D—TEXTILES; PAPER
  • D03—WEAVING
  • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
  • D03C5/00—Cam or other direct-acting shedding mechanisms, i.e. operating heald frames without intervening power-supplying devices
  • D03C5/005—Leveling mechanisms

Definitions

• the invention relates to a device for leveling the position of the frames of a weaving loom equipped with a cam-armor mechanism.
• the invention also relates to an armor mechanism comprising such a device as well as to a loom equipped with such a mechanism.
• camshaft mechanics are known which include a series of oscillating levers in number equal to that of the heald frames to be mounted on the loom, each oscillating lever being designed to be coupled to the one of the frames and equipped with two rollers which cooperate with the two tracks of a complementary cam driven in rotation by a common shaft.
• the invention more particularly intends to remedy by proposing a leveling device which is particularly simple to construct and to use and which makes it possible to move with good precision the various roller levers of a cam armor mechanism.
• the invention relates to a device for leveling the position of the frames of a weaving loom equipped with a camouflage weave mechanism, these frames being actuated by oscillating levers provided with follower rollers and mounted on a common shaft whose position relative to the mechanical frame is variable by means of at least one eccentric.
• This device is characterized in that the angular orientation of the eccentric is controlled by means of a motorization assembly articulated on the frame around an axis generally parallel to the pivot axis of the eccentric, the shaft outlet of this motor assembly being integral in rotation with, or formed by, a threaded rod engaged in a captive nut of an eccentric operating arm.
• the threaded rod driven in rotation by the motor directly attacks the captive nut of the operating arm, which has the effect of rotating this operating arm around the pivot axis of the eccentric, that is to say to control the positioning of the common shaft of the oscillating roller levers along its trajectory in an arc imposed by the eccentric.
• a leveling device can incorporate one or more of the following characteristics: -
• the nut is articulated relative to the operating arm, at least about an axis generally parallel to the pivot axis of the eccentric.
• the operating arm is provided with a support surface against an end-of-travel stop when the eccentric is in a position compatible with the use of weave mechanics for weaving.
• a member driven by the eccentric is able to come into abutment against an end of travel stop when the levers are in the leveling position. In this case, this member is advantageously secured to the operating arm.
• the limit stop is equipped with means for detecting the support or arm or the aforementioned member in one of the above-mentioned positions.
• the geometric axis of the shaft common to the levers, the geometric axis of the cam drive shaft and the geometric pivot axis of the eccentric are substantially parallel and co-planar.
• This aspect of the invention contributes to good stability of the weave mechanics in the weaving configuration.
• the shaft common to the lever is supported relative to the frame by means of two eccentrics each arranged in the vicinity of one of its ends.
• the invention also relates to a camming armor mechanism for a weaving loom which comprises a leveling device as described above. Such a mechanism is more economical, more reliable and easier to implement, in particular for leveling the frames of the trade, than known materials.
• the invention finally relates to a weaving loom equipped with a weaving mechanism as mentioned above.
• FIG. 1 is a partial schematic representation of the principle of a weaving loom according to the invention
• - Figure 2 is a schematic representation on a larger scale of the weave mechanics of the loom of Figure 1 in weaving configuration
• - Figure 3 shows some parts of the mechanics of Figure 2 when these pass from a weaving configuration to a leveling configuration
• - Figure 4 is a view similar to Figure 3, while the mechanics is in the leveling configuration
• - Figure 5 is an enlarged view of detail V in Figure 2
• - Figure 6 is an enlarged view of detail VI in Figure 4
• Figure 7 is a perspective view of certain components of the mechanical leveling device shown in Figures 2 to 6.
• the loom M shown in Figure 1 includes several heald frames, only one of which is shown in Figure 1 with the reference 1.
• the different frames of the loom M are driven by a movement of vertical oscillations represented by the double arrow Fi and printed by a cam mechanism 10, the outlet levers 11 of which respectively attack connecting rods 12 associated with bent levers 13 connected to each other and to the frame 1 by connecting rods 1.
• the levers 11 are provided in a number equivalent to the number of heddle frames 1 and pivotally mounted, as shown in the double arrow F 2 , around the longitudinal axis of a common shaft 15 supported by the frame 16 of the mechanism 10.
• the shaft 15 is equipped, at its two ends, with two eccentrics 17 and 17 'which themselves support the shaft 15 and which are supported by two bearings, not shown, defined by the frame 16.
• the mechanism 10 also includes several cams complementary 18 whose combined tracks 18A and 18B receive the rollers 19A and 19B in support from the same lever 11. Thus, each lever 11 follows a movement imposed by the geometry of the tracks 18A and 18B of the cam 18 with which it is associated .
• a bevel gear 20 is mounted at the end of the shaft 21 common to the cams 18. For clarity of the drawing, the bevel gear 20 is shown only in the figures
• a cover 16B shows on the frame 16 and represented by its silhouette in dashed lines only in FIGS. 1 and 2.
• the axes X ⁇ 5 and X ⁇ 7 and X 2 ⁇ are co-planar, which means that the efforts spacer between shafts the 5 and 21 resulting from the action of the cams on the levers do not tend to rotate the eccentric 17 and its load control device.
• the levers 11 should be brought into the configuration of FIG. 4 where the rollers 19A and 19B are spaced from the cams 18 and where the levers 11 all have the same angular position relative to to the X15 axis.
• an electric motor 40 is mounted on a support 41 articulated around an axis X 42 defined by two bearings, only one of which is visible in FIG. 2 with the reference 42, these bearings being carried by a middle part 16A of the frame 16.
• the axis X 42 is generally parallel to the axes X 15 , X ⁇ and X 2 ⁇ .
• the assembly formed of the elements 40 and 41 can pivot around the axis X 42 as represented by the double arrow F 3 .
• the output shaft 40A of the motor 40 is received in a sleeve 43 maintained by a bearing 44 in the support 41.
• a key 45 makes it possible to associate in rotation the shaft 40A and the sleeve 43.
• a threaded rod 46 is engaged in the sleeve 43 and secured thereto in rotation by means of a pin 47.
• the threaded rod can be driven in rotation by the motor 40 in a direction which depends on the supply current of the motor 40
• the output shaft of the motor 40 could protrude outside the support 41 and be threaded.
• a nut 50 the thread of which is adapted to the thread of the rod 46, is mounted on this rod and held captive at the end of an operating arm 60 secured to the eccentric 17 and extending substantially in a radial direction relative to the axis X ⁇ 7 .
• the arm 60 which makes it possible to exert a torque for rotating the eccentric 17 around the axis X i7 , comprises a main part 60A and a plate 60B attached to the part 60A.
• the nut 50 is trapped between the elements 60A and 60B. It has two pins, only one of which is visible with the reference 61, which are engaged in the corresponding bores of the elements 60A and 60B, so that the nut 50 is articulated relative to the arm 60 around an axis X 6 ⁇ substantially parallel to the axes X 15 , X 17 , X 2 ⁇ and X ⁇ 3 .
• the plate 60B is not shown in FIGS. 2 to 6 for the sake of clarity of the drawing.
• the motor 40 is actuated so as to drive the threaded rod 46 in a direction of rotation R inducing a displacement of the nut 50 in the direction of the support 41, as represented by the arrow Fi.
• This displacement has the effect of rotating the arm 60 and the eccentric 17 in the direction of the arrow F 5 , which has the effect of rotating, in the same direction, the geometric axis X 15 around the axis geometrical X ⁇ thus moving the shaft 15 away from the shaft 21 along a circular arc path C shown in phantom in Figure 3.
• a stop 70 is mounted on the frame 16 and carries a contact switch 71 provided with a rod 72 against which abuts a surface 62 of the arm 60, as represented in FIG. 5. This makes it possible to detect that the eccentrics 17 and 17 ′ are indeed in an end-of-travel position where the rollers of the various levers 11 are in reduced clearance with the combined tracks of the associated cams 18.
• the switch 71 is actuated, the power supply to the motor 40 is interrupted and weaving can take place.
• the arm 60 is extended by an extension 63 diametrically opposite the end of the arm 60 on which the nut 50 pivots and which comes to bear against a surface 73 of the stop 70 in the configuration of FIG. 4.
• a switch of the type of switch 71 can be provided on the stop 70 to detect the fact that the armor mechanics is in the leveling configuration.
• the invention is not limited to the single embodiment described and can, in particular, be implemented with the devices shown in FIGS. 2 and 5 of EP-B-0 580 528.
• the axis of articulation of the motor assembly can be located opposite the motor output shaft relative to this motor, that is to say, in the representation of the figures, at - above the engine.

Landscapes

• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Looms (AREA)
• Weight Measurement For Supplying Or Discharging Of Specified Amounts Of Material (AREA)
• Measurement Of Force In General (AREA)
• Spinning Or Twisting Of Yarns (AREA)
• Woven Fabrics (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=34944509

Family Applications (1)

Country Status (8)

Families Citing this family (3)

Family Cites Families (5)

• 2004
  • 2004-03-29 FR FR0403218A patent/FR2868090B1/fr not_active Expired - Fee Related
• 2005
  • 2005-03-25 KR KR1020067020059A patent/KR101245226B1/ko active IP Right Grant
  • 2005-03-25 DE DE602005026645T patent/DE602005026645D1/de active Active
  • 2005-03-25 CN CN200580010136XA patent/CN1938462B/zh active Active
  • 2005-03-25 AT AT05744362T patent/ATE500363T1/de not_active IP Right Cessation
  • 2005-03-25 WO PCT/FR2005/000725 patent/WO2005098107A1/fr active Application Filing
  • 2005-03-25 JP JP2007505580A patent/JP2007530815A/ja active Pending
  • 2005-03-25 EP EP05744362A patent/EP1743058B1/de active Active

Non-Patent Citations (1)

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