Mounting frame and loom fitted with said mounting frame

Abstract

The frame, which is obtained by assembling two struts ( 21 ) with two cross-bars ( 22 ) each of which is provided with a heald-carrier rod ( 29 ), comprises at least one hoop ( 40 ) surrounding a tubular extremity ( 28 ) of said cross-bar ( 22 ) in an area in which it is joined to the adjacent strut ( 21 ) and an area in which at least one locking member ( 25, 26 ) of part ( 21 a ) of said strut is received. The area of junction is created in part ( 35 ) of the extremity ( 28 ) provided with an external transverse profile which is essentially convex. The hoop is provided in order to resist a locking effort (F 3 , F′ 3 ) exerted by the locking member ( 23, 24 ).

1 . Heald frame for weaving loom, said frame being obtained by assembling two struts with two cross-bars each provided with a heald-carrier rod in one piece with the corresponding cross-bar or added thereon over substantially the whole of its length, at least one of the extremities of at least one of the cross-bars being equipped with at least one member for locking a part of an adjacent strut, inside an end portion of said cross-bar forming a zone of junction with said strut, characterized in that said end portion (P) comprises a part ( 35 ;  135 ;  235 ;  335 ;  435 ;  535 ;  835 ;  935 ;  1035 ;  1135 ) whose external transverse profile is substantially convex and at least one hoop ( 40 ;  140 ;  240 ;  340 ;  440 ;  540 ;  640 ;  740 ;  840 ;  940 ;  1040 ;  1140 ) surrounding said part of substantially convex external transverse profile and said locking member ( 25 ,  26 ;  944 - 946 ;  1044 ,  1046 ;  1125   a ,  1126 ), in order to resist a locking effort (F 3 , F′ 3 ) exerted by said locking member.  
   
   
       2 . Heald frame according to  claim 1 , characterized in that said hoop ( 40 ;  140 ;  240 ;  340 ;  440 ;  540 ;  640 ;  740 ;  840 ;  940 ;  1040 ) surrounds said part of substantially convex external transverse profile ( 35 ;  135 ;  235 ;  335 ;  435 ;  535 ;  835 ;  935 ;  1035 ) which is tubular and itself surrounds said locking member ( 25 ,  26 ;  1044 ,  1046 ) and/or said part ( 921   a ;  1021   a ) of said strut.  
   
   
       3 . Frame according to  claim 1 , characterized in that said cross-bar ( 22 ;  122 ;  222 ;  322 ;  422 ;  522 ;  622 .  822 ;  922 ;  1022 ;  1122 ) is provided, between said zone of junction ( 35 ;  135 ;  235 ;  335 ;  435 ;  535 ;  835 ;  935 ;  1035 ;  1128   a ) and said heald-carrier rod ( 29 ;  129 ;  829 ;  929 :  1129 ), with a volume ( 36 ;  136 ;  436 ;  836 ;  936 ;  1136 ) for partially receiving said hoop ( 40 ;  140 ;  240 ;  340 ;  440 ;  540 ;  640 ;  740 ;  840 ;  940 ;  1040 ;  1140 ).  
   
   
       4 . Frame according to  claim 3 , characterized in that said volume is formed by a groove ( 36 ;  136 ;  436 ;  836 ;  936 ;  1136 ) extending between said zone of junction ( 35 ;  135 ;  435 ;  935 ;  1128   a ;  1135 ) and said rod ( 29 ;  129 ;  829 ;  939 ;  1129 ), in a direction (Y 36 -Y′ 36 ; Y 836 -Y′ 836 ) substantially parallel to a longitudinal axis (Y 22 -Y′ 22 ; Y 822 -Y′ 822 ) of said cross-bar ( 22 ;  122 ;  822 ;  922 ;  1122 ).  
   
   
       5 . Frame according to  claim 4 , characterized in that said groove ( 36 ;  136 ;  436 ) opens out on a terminal face ( 28   a ) of the extremity ( 28 ;  928 ;  1028 ) of the cross-bar ( 22 ;  122 ;  222 ;  322 ;  422 ;  522 ;  622 ;  922 ;  1022 ;  1122 ).  
   
   
       6 . Frame according to  claim 3 , characterized in that said groove is formed by an oblong slot ( 836 ) made between said part ( 835 ) of substantially convex external transverse profile and said heald-carrier rod ( 829 ), said slot not opening out on a terminal face ( 828   a ) of the extremity ( 828 ) of the cross-bar ( 822 ).  
   
   
       7 . Frame according to  claim 1 , characterized in that said heald-carrier rod ( 29 ;  129 ;  829 ;  929 ;  1129 ) extends in overhang over a part ( 29   a ;  129   a ;  929   a ) of its length disposed opposite said zone of junction ( 35 ;  135 ;  935 ;  1128   a ;  1135 ).  
   
   
       8 . Frame according to  claim 1 , characterized in that it comprises means ( 40 - 42 ;  144 - 146 ;  244 - 247 ;  344 - 347 ;  444 ,  448 ;  541 ;  944 - 946 ;  1044 ,  1046 ;  1148 ) for immobilizing said hoop ( 40 ;  140 ;  240 ;  340 ;  440 ;  540 ;  640 ;  740 ;  840 ;  940 ;  1040 ;  1140 ) on said zone of junction ( 35 ;  135 ;  235 ;  335 ;  435 ;  535 ;  835 ;  935 ;  1035 ;  1128   a ;  1135 ).  
   
   
       9 . Frame according to  claim 8 , characterized in that said immobilizing means comprise a wedge ( 144 ,  144 ′;  244 ;  344 ) adapted to cooperate with a corresponding ramp ( 146   a ,  146   a ′,  222   b ;  340   c ) provided on an outer face ( 222   b ) of said cross-bar ( 222 ), on an intermediate piece ( 146 ) or on an inner face ( 340   c ) of said hoop ( 340 ) with a view to tensioning said hoop ( 140 ;  240 ;  340 ).  
   
   
       10 . Frame according to  claim 9 , characterized in that said wedge ( 144 ;  244 ;  344 ) is controlled, in its displacement with respect to said ramp ( 146   a ,  146 ′ a ,  222   b ;  340   c ), by means of a screw-nut link ( 144 - 145 ;  244 - 245 ;  344 - 345 ).  
   
   
       11 . Frame according to  claim 8 , characterized in that said hoop ( 440 ;  1140 ) is glued ( 448 ;  1148 ) around said extremity ( 435 ;  1128   a ) of cross-bar ( 422 ;  1122   a ).  
   
   
       12 . Frame according to  claim 8 , characterized in that said hoop ( 540 ) is provided with at least one orifice ( 540   e ) for passage of a locking member ( 541 ) on said cross-bar extremity ( 535 ).  
   
   
       13 . Frame according to  claim 1 , characterized in that said hoop ( 40 ) is formed by bending a metal sheet shaped around said zone of junction ( 35 ).  
   
   
       14 . Frame according to  claim 1 , characterized in that it comprises mechanical means ( 944 - 946 ;  1044 - 1045 ) adapted to ensure both the immobilization (F 10 ) of a part ( 921   a ,  1021   a ) of said strut ( 921 ;  1021 ) in said end part ( 935 ; 1035 ) and the tensioning (F 11 ) of said hoop ( 940 ;  1040 ).  
   
   
       15 . Frame according to  claim 14 , characterized in that said mechanical means comprise at least one wedge ( 944 ,  944 ′,  946 ;  1044 ,  1044 ′) interposed between said part ( 921   a ,  1021   a ) of said strut ( 921 ;  1021 ) and said hoop ( 940 ;  1040 ).  
   
   
       16 . Frame according to  claim 15 , characterized in that said wedge ( 944 ,  944 ′;  1044 ,  1044 ′) is controlled, in a movement of translation substantially parallel to a longitudinal axis (Y 922 -Y′ 922 ; Y 1022 -Y′ 1022 ) of said cross-bar ( 922 ;  1022 ), by a screw-nut type link ( 944 - 945 ;  1044 - 1045 ).  
   
   
       17 . Frame according to  claim 15 , characterized in that said mechanical means comprise two wedges ( 944 ,  944 ′;  1044 ,  1044 ′) provided with effort transmission ramps ( 944   a ,  944 ′ a ;  1044   a ,  1044 ′ a ) inclined at angles (α 1 , α 2 ; β 1 , β 2 ) opposite with respect to a longitudinal axis (Y 922 -Y′ 922 ; Y 1022 -Y′ 1022 ) of said cross-bar ( 922 ;  1022 ).  
   
   
       18 . Frame according t claim 14 , characterized in that the part ( 921   a ,  1021   a ) of said strut ( 921 ;  1021 ) inserted in said end part ( 935 ;  1035 ) of the cross-bar ( 922 ;  1022 ) is in one piece with the principal elongated part ( 921   b ;  1021   b ) of said strut.  
   
   
       19 . Frame according to  claim 14 , characterized in that the part ( 1021   a ) of said strut ( 1021 ) inserted in said end part ( 1035 ) of the cross-bar ( 922 ;  1022 ) is provided with a member ( 1021   e ) for holding said mechanical means ( 1044 - 1045 ).  
   
   
       20 . Frame according to  claim 16 , characterized in that said member is a rod ( 1021   e ) provided with an orifice ( 1021   f ) for passage of a screw ( 1045 ) for tightening two wedges ( 1044 ,  1044 ′) against ramps ( 1021   c ,  1021   d ) formed on said part ( 1021   d ) of said strut ( 1021 ), on either side of said rod.  
   
   
       21 . Frame according to  claim 14 , characterized in that, at the level of at least one of its upper ( 932 ,  1032 ) or lower ( 921 ,  1031 ) zones of contact with the strut ( 921 ) and/or with wedges ( 1044 ,  1044 ′) borne by said strut ( 1021 ), said cross-bar ( 922 ,  1022 ) is provided with at least two substantially planar bearing surfaces ( 931   i ,  931   j ,  932   i ,  932   j ) parallel to a longitudinal axis (Y 922 -Y′ 922 ) of the cross-bar and oblique between one another, while said part ( 921   a ) of said strut ( 921 ) introduced in said cross-bar and/or wedges ( 1044 ,  1044 ′) borne by said part ( 1021   a ) is and/or are provided with complementary bearing surfaces ( 921   i ,  921   j ) likewise oblique between one another.  
   
   
       22 . Frame according to  claim 14 , characterized in that said mechanical means comprise at least one control screw ( 945 ;  1045 ) offset, in a direction perpendicular to a longitudinal axis (X 922 -X′ 922 ; Y 1022 -Y′ 1022 ) of said cross-bar ( 922 ;  1022 ) and beyond the part ( 921   a ,  1021   a ) introduced in said cross-bar, with respect to a principal part ( 921   b ;  1021   b ) of said strut ( 921 ;  1021 ).  
   
   
       23 . Frame according to  claim 3 , characterized in that said hoop ( 1140 ) surrounds (at  1140   a ) an extremity ( 1128   a ) of a principal part ( 1122   a ) of said cross-bar ( 1122 ) and extends beyond this extremity in a tubular part ( 1140   b ) for receiving and immobilizing said part ( 1121   a ) of said strut ( 1121 ).  
   
   
       24 . Frame according to  claim 23 , characterized in that said hoop is crimped hot around said cross-bar.  
   
   
       25 . Frame according to  claim 3 , characterized in that said cross-bar ( 922 ) is provided with at least one flexible slot ( 949 ).  
   
   
       26 . Frame according to  claim 25 , characterized in that said part of said extremity ( 935 ) of substantially convex profile is of substantially rectangular section and in that said slot ( 949 ) is made in a long side ( 933 ,  934 ) of said section.  
   
   
       27 . Frame according to  claim 2 , characterized in that the substantially convex profile of said part ( 1035 ) of said extremity of the cross-bar is obtained by adding a filling element ( 1050 ) between said part ( 1035 ) and said hoop ( 1040 ).  
   
   
       28 . Weaving loom (M) equipped at least with a heald frame ( 2 ) according to  claim 1.