CA1079315A - Facing ply separator - Google Patents
Facing ply separatorInfo
- Publication number
- CA1079315A CA1079315A CA326,480A CA326480A CA1079315A CA 1079315 A CA1079315 A CA 1079315A CA 326480 A CA326480 A CA 326480A CA 1079315 A CA1079315 A CA 1079315A
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- CA
- Canada
- Prior art keywords
- workpiece
- rotatable
- stack
- topmost
- needles
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
ABSTRACT
The specification describes an apparatus for sequentially separating alternate layers of sheet-like work pieces from a single feed stack, including means for separating each top workpiece layer from the feed stack and means for transporting the separated top workpieces alternately to a first location and to a second location, the separating means including at least one differentiating head having a pair of rotatable elements, means for mounting the rotatable elements so that their axes of rotation are parallel and opposite to each other, needles mounted in the rotatable elements so as to protect exteriorly of the elements and in a direction away from the opposite rotatable element, means for selectively rotating at least one of the rotatable elements with respect to the other to engage and disengage the protecting needles of the rotated element with the top workpiece of the feed stack, depending on the direction of rotation, and for moving at least one rotatable element with respect to the other to decrease the spacing between the axes of rotation of the rotatable elements upon rotation of the rotatable element in a direction which engages its pro-jecting needles in the topmost workpiece whereby at least one edge of the topmost workpiece is curled upwardly and, upon movement of the rotated element toward the other element, the topmost workpiece is pulled away from the corresponding edge of the next underlying workpiece by the force of the engaged rotatable element needles to thereby separate the topmost workpiece from the stack.
The specification describes an apparatus for sequentially separating alternate layers of sheet-like work pieces from a single feed stack, including means for separating each top workpiece layer from the feed stack and means for transporting the separated top workpieces alternately to a first location and to a second location, the separating means including at least one differentiating head having a pair of rotatable elements, means for mounting the rotatable elements so that their axes of rotation are parallel and opposite to each other, needles mounted in the rotatable elements so as to protect exteriorly of the elements and in a direction away from the opposite rotatable element, means for selectively rotating at least one of the rotatable elements with respect to the other to engage and disengage the protecting needles of the rotated element with the top workpiece of the feed stack, depending on the direction of rotation, and for moving at least one rotatable element with respect to the other to decrease the spacing between the axes of rotation of the rotatable elements upon rotation of the rotatable element in a direction which engages its pro-jecting needles in the topmost workpiece whereby at least one edge of the topmost workpiece is curled upwardly and, upon movement of the rotated element toward the other element, the topmost workpiece is pulled away from the corresponding edge of the next underlying workpiece by the force of the engaged rotatable element needles to thereby separate the topmost workpiece from the stack.
Description
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` ~ BACXI~ROUND OF TIIE INVENTION :-. :
- The invention relates to automatic apparatus for separating ~ ~ alternately facing fabric workpieces from a single stack into i~ two separate stacks~ -It is often desirable in the garment fa~rication industry to separate layers of stacked fabric workpieces from eacll other ''1 :
:
,,,. 1 ~ :
3~
and to transport them to other work stations. Such prior art separating devices are descrlbed in U.S. Patents Nos. 3,253,824 granted on May 3, ]966 to L ~ L Manufacturing, Inc. and 3,0~2,505 granted on July 3, 1962 to Esso Research and Engineering Company.
As pointed out in those patents, separating stacked fabric layers is extremely difficult since the layers of fabric, during cutting, tend to have their end threads interwoven and are thereby bo-nded together. It requires considerable ingenuity to separate each layer of fabric Erom this bonding interengagement of the end threads without simultaneously disrupting the placement of the layers in the stack.
It is desirable not to disturb the placement of the layers in the stack in order that the workpieces may be accurate-ly aligned with respect to the separating apparatus and so that after separation they can be transported to another work station with a predetermined orientation. If the fabric layers are mis-aligned, they will not be properly transported in an aligned relationship to the next work station, but, instead, will be mis-positioned upon reaching the subsequent work station.
In one garment industry operation, left and right pocket facings are cut simultaneously on a spreading table from -a fabric stack having alternately face-up and fac0-down layers.
The result is a plurality of smaller stacks of alternating left and right facing plies. It then becomes necessary to separate these left and right facing plies into two separate stacks of all left and all right facing plies. In order to do this auto-matically, it is not only necessary to effectively separate the alternate left and right facing plies from the stack without misalignment, as described above~ but it is also necessary to ~ detect whether the stack somehow contains two facing plies oriented in the same direction, that is, face-up or face~down. It is ~j,.. ", .: , . :, ~- 2 ~ ~
3~
further necessary to detect whether one of the differentiated plies has been dropped by the differentiating head since this would cause one of the stacks to be short in the number of facing plies. ~
: '' .. :..
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SUMMA~Y _F T~E INVENTION
The above and other disadvantages a:re overcome by the present invention of an appar~tus for sequentially separating alternate layers of sheet-like ~orkpieces from a single feed stack, the apparatus comprising means for separating each top workpiece layer from the feed stack and means for transporting the separated top workpieces alternately to a first location and to a second location, the separating means including at least one differentiating head having a pair of rotatable elements, means for mounting the rotatable elements so that their axes of rotation are parallel and opposite to each other, needles mounted in the rotatable elements so as to project exteriorly of the elements and in a direction away from the opposite rotatable element, means for selectively rotating at least one of the rotatable elements with respect to the other to engage and disengage the projecting needles of the rotated element with the top workpiece o~ the feed stack~ depending on the direc-tion of rotation, and for moving at least one rotatable :
element with respect to the other to decrease the spacing between the axes of rotation of the rotatable elements upon rotation of the rotatable element in a direction which engages - its projecting needles in the topmost workpiece, whereby at least one edge of the topmost workpiece is curled upwardly and, upon movement of the rotated element toward the other element, the topmost workpiece is pulled away from the corres~
ponding edge of t:he next underlying workpiece by the force ..
of the engaged rotatable element needles to thereby separate 29 the topmost workpiece from the stack.
.- ;,.
~ - 3 ~, ~ ~, 3~S
The foregoing and other objectives, features and advantages of the invention will be more readily understood upon consideration of the following detailed description of certain preferred embodiments of the invention, taken in conjunction with the accompanying clrawings.
1:
1' ' :: , : ~ , :, 1 ¦ B~IEF DESC~IPl~ON OF TilE DRAWII~lGS
. ____ _____ ,
- ' , "', .
. : ' , . .
.. . . .
` ~ BACXI~ROUND OF TIIE INVENTION :-. :
- The invention relates to automatic apparatus for separating ~ ~ alternately facing fabric workpieces from a single stack into i~ two separate stacks~ -It is often desirable in the garment fa~rication industry to separate layers of stacked fabric workpieces from eacll other ''1 :
:
,,,. 1 ~ :
3~
and to transport them to other work stations. Such prior art separating devices are descrlbed in U.S. Patents Nos. 3,253,824 granted on May 3, ]966 to L ~ L Manufacturing, Inc. and 3,0~2,505 granted on July 3, 1962 to Esso Research and Engineering Company.
As pointed out in those patents, separating stacked fabric layers is extremely difficult since the layers of fabric, during cutting, tend to have their end threads interwoven and are thereby bo-nded together. It requires considerable ingenuity to separate each layer of fabric Erom this bonding interengagement of the end threads without simultaneously disrupting the placement of the layers in the stack.
It is desirable not to disturb the placement of the layers in the stack in order that the workpieces may be accurate-ly aligned with respect to the separating apparatus and so that after separation they can be transported to another work station with a predetermined orientation. If the fabric layers are mis-aligned, they will not be properly transported in an aligned relationship to the next work station, but, instead, will be mis-positioned upon reaching the subsequent work station.
In one garment industry operation, left and right pocket facings are cut simultaneously on a spreading table from -a fabric stack having alternately face-up and fac0-down layers.
The result is a plurality of smaller stacks of alternating left and right facing plies. It then becomes necessary to separate these left and right facing plies into two separate stacks of all left and all right facing plies. In order to do this auto-matically, it is not only necessary to effectively separate the alternate left and right facing plies from the stack without misalignment, as described above~ but it is also necessary to ~ detect whether the stack somehow contains two facing plies oriented in the same direction, that is, face-up or face~down. It is ~j,.. ", .: , . :, ~- 2 ~ ~
3~
further necessary to detect whether one of the differentiated plies has been dropped by the differentiating head since this would cause one of the stacks to be short in the number of facing plies. ~
: '' .. :..
~ 2a -~L0~
SUMMA~Y _F T~E INVENTION
The above and other disadvantages a:re overcome by the present invention of an appar~tus for sequentially separating alternate layers of sheet-like ~orkpieces from a single feed stack, the apparatus comprising means for separating each top workpiece layer from the feed stack and means for transporting the separated top workpieces alternately to a first location and to a second location, the separating means including at least one differentiating head having a pair of rotatable elements, means for mounting the rotatable elements so that their axes of rotation are parallel and opposite to each other, needles mounted in the rotatable elements so as to project exteriorly of the elements and in a direction away from the opposite rotatable element, means for selectively rotating at least one of the rotatable elements with respect to the other to engage and disengage the projecting needles of the rotated element with the top workpiece o~ the feed stack~ depending on the direc-tion of rotation, and for moving at least one rotatable :
element with respect to the other to decrease the spacing between the axes of rotation of the rotatable elements upon rotation of the rotatable element in a direction which engages - its projecting needles in the topmost workpiece, whereby at least one edge of the topmost workpiece is curled upwardly and, upon movement of the rotated element toward the other element, the topmost workpiece is pulled away from the corres~
ponding edge of t:he next underlying workpiece by the force ..
of the engaged rotatable element needles to thereby separate 29 the topmost workpiece from the stack.
.- ;,.
~ - 3 ~, ~ ~, 3~S
The foregoing and other objectives, features and advantages of the invention will be more readily understood upon consideration of the following detailed description of certain preferred embodiments of the invention, taken in conjunction with the accompanying clrawings.
1:
1' ' :: , : ~ , :, 1 ¦ B~IEF DESC~IPl~ON OF TilE DRAWII~lGS
. ____ _____ ,
2 FIG. l is a perspective view of a sep~ratiny a~paratus
3 according to the invention;
4 ¦ FIG. 2 is a dlagrammatic illustration for use in explaining the operation of the embodiment dep:icted in FI~. l;
6 FIG. ~ is an enlarged, vertical, front view of the single stack feed elevator of the embodiment depicted in FIG. 1, with 8 portions broken away and in section;
9 FIG. 4 is an enlarged, plan v:iew of the elevator c1epicted in FIG. 3 and with portions broken away and in section;
ll FIG. 5 is an enlarged, vertical, side view o~ the elevator 12 depicted in FIG. 3 with portions broken away, an~ in section;
13 FIG. 6 is an enlarged, front view of the carriage transfer 14 mechanism of the embodiment depicted in FIG. l, with portions 15 broken away and in section; ~ .
16 FIG. 7 is a plan view, with portions broken away and in ~.
17 section of a differentiating head according to the invention; .
18 FIG. 8 is an enlarged, vertical view of a differentiating .
19 head according to the invention; -20 FIG. 9 is an enlarged, vertical, sectional view, with ~.
21 portions broken away, of one of the differentiating cylinders of 22 the differentiating head depicted in FIG. 8; 1:
23 FIG. l0 is a vertical sectional view taken c;enerally along ::.--24 the lines l0-l0 of FIG. 7; !; :
FIG. ll is a perspective view of the separatiny apparatus 26 :of the invention used in conjunction with other gaxment ::
27 fabricating apparatus; :.
28 FIGS. l~A - :12H, inclusive, are diagrammatic illustrations 29 of a second embodiment of the invention and-its mctl~od of :
30 operation; :
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1 I FIGS. 13A - 13G, inclusive, are diagra1lunat:ic illustrations 2 I of a third embodiment of the invention and its metho~ of 3 ~ operation;
4 FIGS. 14A - 14F, inclusive, are diagrammatic illustrations
6 FIG. ~ is an enlarged, vertical, front view of the single stack feed elevator of the embodiment depicted in FIG. 1, with 8 portions broken away and in section;
9 FIG. 4 is an enlarged, plan v:iew of the elevator c1epicted in FIG. 3 and with portions broken away and in section;
ll FIG. 5 is an enlarged, vertical, side view o~ the elevator 12 depicted in FIG. 3 with portions broken away, an~ in section;
13 FIG. 6 is an enlarged, front view of the carriage transfer 14 mechanism of the embodiment depicted in FIG. l, with portions 15 broken away and in section; ~ .
16 FIG. 7 is a plan view, with portions broken away and in ~.
17 section of a differentiating head according to the invention; .
18 FIG. 8 is an enlarged, vertical view of a differentiating .
19 head according to the invention; -20 FIG. 9 is an enlarged, vertical, sectional view, with ~.
21 portions broken away, of one of the differentiating cylinders of 22 the differentiating head depicted in FIG. 8; 1:
23 FIG. l0 is a vertical sectional view taken c;enerally along ::.--24 the lines l0-l0 of FIG. 7; !; :
FIG. ll is a perspective view of the separatiny apparatus 26 :of the invention used in conjunction with other gaxment ::
27 fabricating apparatus; :.
28 FIGS. l~A - :12H, inclusive, are diagrammatic illustrations 29 of a second embodiment of the invention and-its mctl~od of :
30 operation; :
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1 I FIGS. 13A - 13G, inclusive, are diagra1lunat:ic illustrations 2 I of a third embodiment of the invention and its metho~ of 3 ~ operation;
4 FIGS. 14A - 14F, inclusive, are diagrammatic illustrations
5 ¦ of a.fourth embodiment of the invention and its mctho~ of
6 ¦ operation;
7 FIGS. 15A - 15F, inclusive, are diagrammatic illustrations
8 ¦ of a fifth embodiment of the invention and its rnethod of
9 ¦ ope~ation;
10 ¦ FIGS. 16A - 16F, inclusive, are diagra~natic illustrations ll ¦ of a sixth embodiment of the invention and its method of .
12 I operation; and 13 ¦ FIGS. 17A - 17D, inclusive, are diagrarnmatic illustrations 14 I of a seventh embodiment of the invention and its method of '51 opération.
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1 , DET~ILED DESCllIPTION ~r' TIIE PREFE~RED r MJ3~DI~LIIT
2 Referring now rnore particularly to EIG. 1, the sin(3le 3 I feed stack of alternating facing fabric workpiece~ 10 (shown 4 ¦ in dashed-line fashion for clarity of illustration) lS carried ~ ¦ ~y a single feed elevator 12 mounted for vertical movemen~
6 ¦ in a frame 14. The details of the elevator mecl-anism 12 ¦ ~ill be described further in a subsequent ~ortion of this 8 I application. On the left and right sides of the feed 9 I eievator 12 are positioned additional vertical elevators 10 ¦ 16 and 18, respectively. The elevators 16 and 18 are also '
12 I operation; and 13 ¦ FIGS. 17A - 17D, inclusive, are diagrarnmatic illustrations 14 I of a seventh embodiment of the invention and its method of '51 opération.
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1 , DET~ILED DESCllIPTION ~r' TIIE PREFE~RED r MJ3~DI~LIIT
2 Referring now rnore particularly to EIG. 1, the sin(3le 3 I feed stack of alternating facing fabric workpiece~ 10 (shown 4 ¦ in dashed-line fashion for clarity of illustration) lS carried ~ ¦ ~y a single feed elevator 12 mounted for vertical movemen~
6 ¦ in a frame 14. The details of the elevator mecl-anism 12 ¦ ~ill be described further in a subsequent ~ortion of this 8 I application. On the left and right sides of the feed 9 I eievator 12 are positioned additional vertical elevators 10 ¦ 16 and 18, respectively. The elevators 16 and 18 are also '
11 ¦ mounted in the frame 14 for' vertical movemen~. Whereas
12 ¦ the elevator 12 is mechanized to make upward a~justm~nts
13 ¦ as the layers of garment workpieces 20 are removed from 141 the stack 10, the elevators 16 and 18 are mechanized to , I5¦ ln~ex downwardly by a distance corresponding to the thickness ~
16¦ of one workpiece. The actions of the elevators 12, 16 and 18 ~' 17¦ ~ will be described in greater detail hereinafter.
18 Positioned above the elevators 12, 16 and 18 is the , ,19 differentiating mechanism comprised of a horizontal bar 22 which carries separate differentiating heads 24 and 26 at its 21 right and left ends,'respectively. The differentiating heads 22 24 and 26 are each capable of removing the topmost workpiece , 23 20 from the stack 10 without disturbing the remaining portion 24 of the stack 10. The manner in which this is done will be ~` 25 described in grea,t'er detail at a'later poxtion in this application with particular reference to FIG,. 7.
27 The horizont:al ba~ 22 is carried on the low~r end 28 of a vertical pipe 28 which is flexibly attach~d to a 29 horizontally movable carriage 30 by means of a pair of 31 flexible horizontal straps 32. A second, vertical, hollow , ' , 3Z '' ' ',"
~ ' . ,.. ,.... ' 1 ~ipe 34 is also attached to the horizontal b~r 22 ~y mcans 2¦ of a bracket 36 which is also attached to the first vertical . .
31 pipe 28. The pipe 34 can be connected to a vacuum source 4 ¦ (not shown) in some embodiments or it can simply serve as a S I conduit for air lines 38 which activate the differentiating 61 heads. ' 71 The carriage 30 travels on a pair of vertica:Lly 8.1 spaced apart horizontal, parallel rails 40 mounted in a.
9¦ frame 43 over the area where the stacks of fabric ~orkpieces 10¦ are located. The carriage slides on the rails 40 by means 11¦ of sleeve bearings 42 and roller wheels.(not shown). A motor ¦ driven sprocket chain 44 trained around sprocket gear wheels .
13 .46 at opposite.ends of the rails 40 provides the ~oving
16¦ of one workpiece. The actions of the elevators 12, 16 and 18 ~' 17¦ ~ will be described in greater detail hereinafter.
18 Positioned above the elevators 12, 16 and 18 is the , ,19 differentiating mechanism comprised of a horizontal bar 22 which carries separate differentiating heads 24 and 26 at its 21 right and left ends,'respectively. The differentiating heads 22 24 and 26 are each capable of removing the topmost workpiece , 23 20 from the stack 10 without disturbing the remaining portion 24 of the stack 10. The manner in which this is done will be ~` 25 described in grea,t'er detail at a'later poxtion in this application with particular reference to FIG,. 7.
27 The horizont:al ba~ 22 is carried on the low~r end 28 of a vertical pipe 28 which is flexibly attach~d to a 29 horizontally movable carriage 30 by means of a pair of 31 flexible horizontal straps 32. A second, vertical, hollow , ' , 3Z '' ' ',"
~ ' . ,.. ,.... ' 1 ~ipe 34 is also attached to the horizontal b~r 22 ~y mcans 2¦ of a bracket 36 which is also attached to the first vertical . .
31 pipe 28. The pipe 34 can be connected to a vacuum source 4 ¦ (not shown) in some embodiments or it can simply serve as a S I conduit for air lines 38 which activate the differentiating 61 heads. ' 71 The carriage 30 travels on a pair of vertica:Lly 8.1 spaced apart horizontal, parallel rails 40 mounted in a.
9¦ frame 43 over the area where the stacks of fabric ~orkpieces 10¦ are located. The carriage slides on the rails 40 by means 11¦ of sleeve bearings 42 and roller wheels.(not shown). A motor ¦ driven sprocket chain 44 trained around sprocket gear wheels .
13 .46 at opposite.ends of the rails 40 provides the ~oving
14 force for reciprocating the carriage 30 back and forth on the ralls 40. The carriage 30 is attached to the drive 16 chain 44 by means of a pair of links 48 pivoted at one end :, , 17 to the top and bottom of the carriage 30 and at their other 18 ends to separate vertices of a trianguiar member 50. The . 19 ,third vertex of the triangular member 50 is 'rotatably I : :
; 20 attached to the sprocket chain 44. In thi.s way, no non- ;
21 tensional forces are imparted to the drive chain 44 or to ,. .
22 the sleeve bearings 42 of the carriage 30. A roller 52 ' , ~ 23 projects outwaxdly from the vertex of the triangular member .
1~ 24 50 at the point where it attaches to the sprocket chain 44 ~25 .and is captured by a rectangular br'acke~ 54. The ~:~: 26 rectangular bracket'54 is mountea on one end of a shaft 56, .~ 27 which ls rotatably mounted in a boss 58 attached to.the 28 ~ carriage 30. . ' 29 ' ' ~t the oppos.ite end of the shaft 56 a cranX ' , mechanism:is mounted.. The crank mecha~ism 60 is att~ched 3 to the vertical'p:ipe 28 to xaise and lowerthe vertical pipe ~' 32 28, and hence the differentiating heads 24 and 26, each time :, . -8~ ~ .
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1 the rbller 52 passes around the ends of the sprocket gears 2 46.
3 .
4 The sprocket gears 46 are spaced apart by a distance 5 ¦ corresponding roughly to the distance ~etween the centr~l 6 ¦ feed stack and one o the receiving, separ~ted ply stacks.
¦ The length of the horizontal arm 22 is also equal to the 8 ¦ distance between the central feed stack 10 and one of the 9 ¦ separated ply stacks. In this way, as best viewed in FIG. 6 in hidden-line fas'hion, when the carriage 30 is at 11 the extreme right'hand end of travel as viewed in FIG. 6, 12 the differentiating head 24 will be positioned over the 13 receiving elevator 18 and the differentiating head 26 will ' 14 be positioned over the central feed stack elevator 12. ~t 1~ the extreme left hand end of the travel of the carriage 30, '~
16 as viewed in FIG. 6, the differentiating head 26 will be .-17 positioned over the receiving elevator 16 and the 18 differentiating head 24'will be positioned over the central :' 19 feed stack elevator. 12. As will be explained in greater 20 detail hereinafter, the dif.ferentiating heads 24 an~ 26 are ¦ :
21 opera'ted to engage the topmost workpiece 20 of the central 22 fee-d stack 10 on the elevator 12 at.the same time that the 23 other differentiating head, positioned over one of the 24 receiving elevators 16 or 18, is releasing a previously .... :.. -. .
differentiated workpiece.
~26 Referring now more particularly to FIG. 3, the ~.
27 apparatus for rai~;ing and lowering the stack elevators will ~':
28 be described in greater detail. In the ~ollowing descrip-29 tion, only the single stack feed elevator 12 will be 3l : ' ' ' .'~.'~"
3 ' ' ''' . .
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described, h~wever, it shou1d be understood that this ..
2 ¦ description is equally applicable to the elevators 16 and 18 3 ~ except that whereas the elevator 12 is indexed up~ardly by ..
4 the thickness of each layer which is differentiated, thc '-'.~: -. S elevators 16 and 18 are indexed downwardly for each 6 differentiated layer which is placed on top of the stack. " ' ~¦ The elevator 12 has a leg 62 which is a horizontal ,.
8 platform for carrying the siDgle .feed stàck and a vertical :
9 portion 64 intregaI therewith,.which has an annular slide .- : :
10 'bearin~ 66 for slidably mounti~g the elevator 12 on a vertically '' ' 11 'extending rod 67 m~unted in the frame 14. The elevator 12¦ platform 12 is prevented.from rotating in a horizontal 13 plane by a pair of rollers 68 which straddle a vertically ' ' 14 extending rail 70 spa~ed behind the rod 67, as viewed in
; 20 attached to the sprocket chain 44. In thi.s way, no non- ;
21 tensional forces are imparted to the drive chain 44 or to ,. .
22 the sleeve bearings 42 of the carriage 30. A roller 52 ' , ~ 23 projects outwaxdly from the vertex of the triangular member .
1~ 24 50 at the point where it attaches to the sprocket chain 44 ~25 .and is captured by a rectangular br'acke~ 54. The ~:~: 26 rectangular bracket'54 is mountea on one end of a shaft 56, .~ 27 which ls rotatably mounted in a boss 58 attached to.the 28 ~ carriage 30. . ' 29 ' ' ~t the oppos.ite end of the shaft 56 a cranX ' , mechanism:is mounted.. The crank mecha~ism 60 is att~ched 3 to the vertical'p:ipe 28 to xaise and lowerthe vertical pipe ~' 32 28, and hence the differentiating heads 24 and 26, each time :, . -8~ ~ .
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1 the rbller 52 passes around the ends of the sprocket gears 2 46.
3 .
4 The sprocket gears 46 are spaced apart by a distance 5 ¦ corresponding roughly to the distance ~etween the centr~l 6 ¦ feed stack and one o the receiving, separ~ted ply stacks.
¦ The length of the horizontal arm 22 is also equal to the 8 ¦ distance between the central feed stack 10 and one of the 9 ¦ separated ply stacks. In this way, as best viewed in FIG. 6 in hidden-line fas'hion, when the carriage 30 is at 11 the extreme right'hand end of travel as viewed in FIG. 6, 12 the differentiating head 24 will be positioned over the 13 receiving elevator 18 and the differentiating head 26 will ' 14 be positioned over the central feed stack elevator 12. ~t 1~ the extreme left hand end of the travel of the carriage 30, '~
16 as viewed in FIG. 6, the differentiating head 26 will be .-17 positioned over the receiving elevator 16 and the 18 differentiating head 24'will be positioned over the central :' 19 feed stack elevator. 12. As will be explained in greater 20 detail hereinafter, the dif.ferentiating heads 24 an~ 26 are ¦ :
21 opera'ted to engage the topmost workpiece 20 of the central 22 fee-d stack 10 on the elevator 12 at.the same time that the 23 other differentiating head, positioned over one of the 24 receiving elevators 16 or 18, is releasing a previously .... :.. -. .
differentiated workpiece.
~26 Referring now more particularly to FIG. 3, the ~.
27 apparatus for rai~;ing and lowering the stack elevators will ~':
28 be described in greater detail. In the ~ollowing descrip-29 tion, only the single stack feed elevator 12 will be 3l : ' ' ' .'~.'~"
3 ' ' ''' . .
~ :~., . . . . : ~ ' , _g_ 1` ~0793~5 :
described, h~wever, it shou1d be understood that this ..
2 ¦ description is equally applicable to the elevators 16 and 18 3 ~ except that whereas the elevator 12 is indexed up~ardly by ..
4 the thickness of each layer which is differentiated, thc '-'.~: -. S elevators 16 and 18 are indexed downwardly for each 6 differentiated layer which is placed on top of the stack. " ' ~¦ The elevator 12 has a leg 62 which is a horizontal ,.
8 platform for carrying the siDgle .feed stàck and a vertical :
9 portion 64 intregaI therewith,.which has an annular slide .- : :
10 'bearin~ 66 for slidably mounti~g the elevator 12 on a vertically '' ' 11 'extending rod 67 m~unted in the frame 14. The elevator 12¦ platform 12 is prevented.from rotating in a horizontal 13 plane by a pair of rollers 68 which straddle a vertically ' ' 14 extending rail 70 spa~ed behind the rod 67, as viewed in
15 FIG. 4. The rollers 68 are attached to the vertically ',-
16¦ extending portion 64'of the elevator 12 by means of an '
17 integrally mounted boss 72 on the vertica'l portion 64. ' '- .
,18 The elevator platform 12 is raised and lowered by 19 means of a v,ertically extending sprocket.chain 74 whic~ is trained around a sprocket pulley 76 mounted on a horizontal 21 shaft 78 at the base of the elevator and around a sprocket 22 ~0 rotatably mounted on a horizontal shaft 82 at the top of l~
23 the elevator. The horizontal shafts 78'and 82 .are rotatably ~ 24 mounted in bosses or brackets.attached to the frame 14. The ~ .
; 25 lower sprocket pulley 76 also has a dri~e chain 84 trained ..
26 around it which is driven by an electric motor 86. It is to ,: 27 be:understood that the motor 86 includes suitable reduction I
~2B ~ gearing (not shown). The, lower sprocket pulley 76 is not 29 pinned to the shaft 78.and rotates freely about it. It is ' ~:~
30 :to be understood that each of the elevat,ors 12, 16 and 18, . ~. .
31~ has an independent motor drive. .:' .:
32 : In order to completely stabilize the platform 12 i0 '' ~:
~ . , _ _ . . ~ , l in the horiz~ntal plc~ne, a pair of vertically extcslding rods 2 88 and 90 are positioned on either slde of the elevator 3 platform near the front, as best viewed in FIG. 4. The 4 vertical rod 90 is on the right side of the platform and the 5 vertical rod 88 is on the left side of the platforrn as .
6 viewed in FIG. 4. Separate xollers 92 and 94 mo~nted on .
7 j the underside of the horizontal portion 62 of the elevator 8 ¦ bear against the rods 88 and 90, respectively. The vertical ¦ rod 88 is mounted on a horizontal swinging arm 96 which is 10 ¦ pivoted on the frame 14 toward the rear of the hori20ntal 11 ¦ platform 62 at a point 98. This allows the vertical rod 88 12 ¦ to be swung open from the platform elevator 12 when the feed 13 ¦ stack is placed on top of the platform 62. The rod 88 is 14 thereafter swung closed to prevent the stack from being 151 removed from the elevator 12.
16¦ The frame 14.includes a top horizontal working 171 space 100 which has a cut-out portion 102 to accommodate the
,18 The elevator platform 12 is raised and lowered by 19 means of a v,ertically extending sprocket.chain 74 whic~ is trained around a sprocket pulley 76 mounted on a horizontal 21 shaft 78 at the base of the elevator and around a sprocket 22 ~0 rotatably mounted on a horizontal shaft 82 at the top of l~
23 the elevator. The horizontal shafts 78'and 82 .are rotatably ~ 24 mounted in bosses or brackets.attached to the frame 14. The ~ .
; 25 lower sprocket pulley 76 also has a dri~e chain 84 trained ..
26 around it which is driven by an electric motor 86. It is to ,: 27 be:understood that the motor 86 includes suitable reduction I
~2B ~ gearing (not shown). The, lower sprocket pulley 76 is not 29 pinned to the shaft 78.and rotates freely about it. It is ' ~:~
30 :to be understood that each of the elevat,ors 12, 16 and 18, . ~. .
31~ has an independent motor drive. .:' .:
32 : In order to completely stabilize the platform 12 i0 '' ~:
~ . , _ _ . . ~ , l in the horiz~ntal plc~ne, a pair of vertically extcslding rods 2 88 and 90 are positioned on either slde of the elevator 3 platform near the front, as best viewed in FIG. 4. The 4 vertical rod 90 is on the right side of the platform and the 5 vertical rod 88 is on the left side of the platforrn as .
6 viewed in FIG. 4. Separate xollers 92 and 94 mo~nted on .
7 j the underside of the horizontal portion 62 of the elevator 8 ¦ bear against the rods 88 and 90, respectively. The vertical ¦ rod 88 is mounted on a horizontal swinging arm 96 which is 10 ¦ pivoted on the frame 14 toward the rear of the hori20ntal 11 ¦ platform 62 at a point 98. This allows the vertical rod 88 12 ¦ to be swung open from the platform elevator 12 when the feed 13 ¦ stack is placed on top of the platform 62. The rod 88 is 14 thereafter swung closed to prevent the stack from being 151 removed from the elevator 12.
16¦ The frame 14.includes a top horizontal working 171 space 100 which has a cut-out portion 102 to accommodate the
18¦ horizontal platform 62 of the elevator 1'. It has similar 1~¦ cut-out portions to accommodate the other elevators as welI.
20l A pair of photo-optic sensors 104 are placed on opposite '. :
21¦ sides of the cut-out space 102 to detect the presence or 22¦ absence of the top layer of material in the stack carried by ~
231 the elevator 12. These photo-optic sensors lead to a i 241 control panel tnot shown) which control the indexing motion 251 of the motor 86 wh.ich raises the elevator 12 by a distance 26¦ corresponding to.the thickness of one ply of fabric.in the . :. -271 stack as it is removed by the differentiating heads.
28¦ second pair of photo-optic sensors 106 are mounted on top of ~¦~
291 the horizontal platform 100 of the fran~e 14 and are directed .~ -~
30 upwardly to detect the contrast of the underside of the .
31¦ fabric workpieces carried by the differentiating heads 24 and 32 26. This contrast is due to the fact tha~ the twill denim .~ :
. - ' ~ ~ ~, , ~ : ~
33~
1 fabric from which the pocke~ facings are made, has a bluc 2 tint on the one side and a white line striped pattern on the 3 opposite side. The white striped side reflects rnore ligl~t 4 and thus can be sensed by the sensors 106. The sensors 106 5 ¦ additionally provide information as to whether or not a -6 ¦ pocket facing has been dropped by one oE the dif~erentiating 7 ¦ heads which also would throw off the sequencing of the ¦ differ~ntiation process.
9 ¦ The controls for the operation of the carriage 10 ¦ transfer 30 and the control for the differentiating heads 24 11 ¦ and 26 will not bê described in detail since such sequential i2 ¦ controls are well known to those skilled in the art. They 13 ¦ basically involve a timing disc mounted to rotate in 14 ¦ synchronism with the drive for the carriaye transfer. Th~e 15 ¦ timing disc includes sensor means for actuating pneumatic 16 ¦ valves and the drive motors in a properly timed sequence. -17 ¦ Referring now more particularly to FIGS. 1, 2 and 18 ¦ 7 - 9, the operation of the differentiating heads will be
20l A pair of photo-optic sensors 104 are placed on opposite '. :
21¦ sides of the cut-out space 102 to detect the presence or 22¦ absence of the top layer of material in the stack carried by ~
231 the elevator 12. These photo-optic sensors lead to a i 241 control panel tnot shown) which control the indexing motion 251 of the motor 86 wh.ich raises the elevator 12 by a distance 26¦ corresponding to.the thickness of one ply of fabric.in the . :. -271 stack as it is removed by the differentiating heads.
28¦ second pair of photo-optic sensors 106 are mounted on top of ~¦~
291 the horizontal platform 100 of the fran~e 14 and are directed .~ -~
30 upwardly to detect the contrast of the underside of the .
31¦ fabric workpieces carried by the differentiating heads 24 and 32 26. This contrast is due to the fact tha~ the twill denim .~ :
. - ' ~ ~ ~, , ~ : ~
33~
1 fabric from which the pocke~ facings are made, has a bluc 2 tint on the one side and a white line striped pattern on the 3 opposite side. The white striped side reflects rnore ligl~t 4 and thus can be sensed by the sensors 106. The sensors 106 5 ¦ additionally provide information as to whether or not a -6 ¦ pocket facing has been dropped by one oE the dif~erentiating 7 ¦ heads which also would throw off the sequencing of the ¦ differ~ntiation process.
9 ¦ The controls for the operation of the carriage 10 ¦ transfer 30 and the control for the differentiating heads 24 11 ¦ and 26 will not bê described in detail since such sequential i2 ¦ controls are well known to those skilled in the art. They 13 ¦ basically involve a timing disc mounted to rotate in 14 ¦ synchronism with the drive for the carriaye transfer. Th~e 15 ¦ timing disc includes sensor means for actuating pneumatic 16 ¦ valves and the drive motors in a properly timed sequence. -17 ¦ Referring now more particularly to FIGS. 1, 2 and 18 ¦ 7 - 9, the operation of the differentiating heads will be
19 ¦ described. Although the description relates particularly
20 ¦ to the differentiating head 26, it will be understood that
21¦ the description is equally applicable to the differentiating
22 ¦ head 24.
231 The differentiating head 26 includes a pair of 24~ spaced apart rectangular, horizontal frame members 108 and 109 mounted on the horizontal bar 22. Separate groups of 26¦ cylindrical elements 110 and 112 are rotatably mounted on 27 ¦ the frame members 108 and 109, respectively. The ~81 cylindrical elements are eccentrically mounted to rotatc ¦ with shafts 114 and 116, respectively. The shaft 114 is more or less centered through the lower right hand quadrant, , . ,~ . ' . .
~ . -12-. ' . ..
3~ j I as vlewed in FIG. 7, of th~ ~ircular cross-section of the .
2 ¦ cylindrical elements 110. The shaft 116 is more or less 3 ¦ centered through the lower left hand quadrant of the cross-4 ¦ section of the cylindrical elements 112. The cylindrical 5 ¦ elements 110 and 112 as well as the shafts 114 and 116 are 6 all parallel to each other. The frames 1.08 and 109 are 7 ¦ adjustably mounted on th.e bar 22 by brackets 111 so that the 8 ¦ cylindrical elements 110 and 112 can be spac~d apart by 9 ¦ slightly less than the width of any given yroup of Eabric .
10 j workpieces 10. As best viewed in FIG. 10, the cylindrical 11 ¦ elements 110 are adjustably spaced apart alony the shaft 114 ..
12 ¦ and the elements 112 are adjustably spaeed apart along the 13 ¦ shaft 116.
14 ¦ Eaeh cylindrical element 110 and 112 has at least 15 ¦ a pair of needles 12p threadably mounted in the eylinder so as . . .
16 ¦ to projeet slightly beyond the cylindrical surfaee of the 17¦ eylinders and at an acute angle to the cylindrical surface (see 18¦ FIG. 8). The needles 120 are each mounted in a threaded 19¦ serew 121 whieh is screwed into a threaded bore 12.3. The .
20¦ needles of the eylinder 110 are mounted so as to be inclined ~
21 ¦ to the- cylindrical surface taken in the countercloekwise . .
22 direction... The needles of the eyli.nder 112 are mounted so . ;
231 as to be inclined to the eylindrieal surfaee in the :
24 ¦ elockwise direetion. Thus, the needles of the eylinders 110 ..
and 112 are directed towards the enas of the topmost fabrie ~:~
26 ¦ layer 20. .
27 ¦ Each eylinde:r 110 and 112 has an outer ,.
28 ~eylindrical layer of foam 122 through which the needles 120 .29 projeet by a distanee whieh is adjus~ted to be sliyhtly less I ; ;
tha~ the thickness of one layer of fabric. in the ~taek 10.
31 I . ll 32 . ` ' - . :.
. . . ~
: . -13-1 . . , . '.' . . . , ~ ... , . . . - ~ . .
7~3~
1 I In t)lis manner, when the ho~izontal arm 22 with the difLcrentiatin 2 head 26 is lowered onto the top of the stack 10 of the fabric 3 layers, the needles 120 will penetrate only into the top layer 4 1 20 of fabric. In order to counter-rotate the cylin~ers llO and 5 ¦ 112, with respect to each other, the shaft 116 of the cylinder 112 is provided with a crank arm 124 which i5 pivotally 7 I connected to the shaft 126 of a pneumatic actuator 128. Upon the 8 ¦ application of a proper pressure dif-.ferential to the actuator 9 ¦ 128 by means of air hoses 130, the shaft 126 may be made to .
. lO ¦ withdraw into the cylinder 128 o~ extend from it. When it is ll withdrawn into the actuator 128, the reaction is to rotate the 12 ¦ cylinder 112 in a clockwise direction, as indicated in 13 ¦ dash-line fashion in FIG. 70 A similar actuator is disposed .
141 on the opposite side of frame 108 to operate the shaft 114 lS¦ and thus simultaneously rotate the cylinder 110 in the opposite .
16¦ direction from the direction of rotation of the cylinder 112.
17¦ Between the.frames 108 and 109, a second.needle 132 is - ¦:
18¦ .mounted in a downwardly extending portion 131 of the frame so as ~91 to project beneath the frame and normal to a hypothetical plane .
20¦ lying tangent to the corresponding portions of the curved 21 surfaces of the cylinders 110 and 112. ~ hlock of foam 134 ~
22¦ surrounds the needle 132. 1.
. 231 The adjustability of the spacing between the cylindrical 24 elements, such as the elements 110, along their axis of rotation allows workpieces of different shapes and sizes to be 26 accommodated. .
~27 In operation,.the differentiating head 26 i~s 28 lowered ~y Ineans oi- the carriage transfer mechanism, as 2 describe~ in greater detail above, onto the top iayer 20 of .
. .
31 . .
3 .
. . .
-14- - : :
. '' . . 1,: ':
~ 1079315 ~:~
the stack 10 of fabric piec~x on the elevator 12. The ~oam 2 122 on the cylinders 110 and 112 as well as the foam hlock ,. ~.
3 134 are slightly cGmpressed and the pne~matic actuator 128 4 ¦ and its corresponding counterpart on the opposite side of the frame, 108, are actuated to counter-rotate the 6 ¦ cylinders 110 and 112 so as to drive the needles 120 into 7 ¦ the topmost fabric layer. Because of the eccentric mountiny ¦ of the cylinders 110 and 112 on the shafts 114 and 116 a more 9 ¦ favorable orbit of motion for the needles is thereby obtained than lf the cylinders were centrally mounted. This eccentric 11 needle movement gives a more favorable angle of penetration, -12 ¦ i.e., nearly perpendicular to the top layer 20 by the needle 13 120. The needle 120 is also swung with less vertical displacement 14 when it is nearly parallel with the stack layers thereby ' providing a hooking action.
16 Because of the location of the cylinclers 110 and -17 112, being adjusted to be close to the edges of the fabric 18 layer 118r the counter-rotation of the cylinders tellds to 19 curl up the edges of the topmost layer, thereby breaklng -20 the bond of interlocking threads which would otlierwise hold ;
it to the next most fa~ric layer. The effect is a 22 stretching of the topmost layer in addition to curling the
231 The differentiating head 26 includes a pair of 24~ spaced apart rectangular, horizontal frame members 108 and 109 mounted on the horizontal bar 22. Separate groups of 26¦ cylindrical elements 110 and 112 are rotatably mounted on 27 ¦ the frame members 108 and 109, respectively. The ~81 cylindrical elements are eccentrically mounted to rotatc ¦ with shafts 114 and 116, respectively. The shaft 114 is more or less centered through the lower right hand quadrant, , . ,~ . ' . .
~ . -12-. ' . ..
3~ j I as vlewed in FIG. 7, of th~ ~ircular cross-section of the .
2 ¦ cylindrical elements 110. The shaft 116 is more or less 3 ¦ centered through the lower left hand quadrant of the cross-4 ¦ section of the cylindrical elements 112. The cylindrical 5 ¦ elements 110 and 112 as well as the shafts 114 and 116 are 6 all parallel to each other. The frames 1.08 and 109 are 7 ¦ adjustably mounted on th.e bar 22 by brackets 111 so that the 8 ¦ cylindrical elements 110 and 112 can be spac~d apart by 9 ¦ slightly less than the width of any given yroup of Eabric .
10 j workpieces 10. As best viewed in FIG. 10, the cylindrical 11 ¦ elements 110 are adjustably spaced apart alony the shaft 114 ..
12 ¦ and the elements 112 are adjustably spaeed apart along the 13 ¦ shaft 116.
14 ¦ Eaeh cylindrical element 110 and 112 has at least 15 ¦ a pair of needles 12p threadably mounted in the eylinder so as . . .
16 ¦ to projeet slightly beyond the cylindrical surfaee of the 17¦ eylinders and at an acute angle to the cylindrical surface (see 18¦ FIG. 8). The needles 120 are each mounted in a threaded 19¦ serew 121 whieh is screwed into a threaded bore 12.3. The .
20¦ needles of the eylinder 110 are mounted so as to be inclined ~
21 ¦ to the- cylindrical surface taken in the countercloekwise . .
22 direction... The needles of the eyli.nder 112 are mounted so . ;
231 as to be inclined to the eylindrieal surfaee in the :
24 ¦ elockwise direetion. Thus, the needles of the eylinders 110 ..
and 112 are directed towards the enas of the topmost fabrie ~:~
26 ¦ layer 20. .
27 ¦ Each eylinde:r 110 and 112 has an outer ,.
28 ~eylindrical layer of foam 122 through which the needles 120 .29 projeet by a distanee whieh is adjus~ted to be sliyhtly less I ; ;
tha~ the thickness of one layer of fabric. in the ~taek 10.
31 I . ll 32 . ` ' - . :.
. . . ~
: . -13-1 . . , . '.' . . . , ~ ... , . . . - ~ . .
7~3~
1 I In t)lis manner, when the ho~izontal arm 22 with the difLcrentiatin 2 head 26 is lowered onto the top of the stack 10 of the fabric 3 layers, the needles 120 will penetrate only into the top layer 4 1 20 of fabric. In order to counter-rotate the cylin~ers llO and 5 ¦ 112, with respect to each other, the shaft 116 of the cylinder 112 is provided with a crank arm 124 which i5 pivotally 7 I connected to the shaft 126 of a pneumatic actuator 128. Upon the 8 ¦ application of a proper pressure dif-.ferential to the actuator 9 ¦ 128 by means of air hoses 130, the shaft 126 may be made to .
. lO ¦ withdraw into the cylinder 128 o~ extend from it. When it is ll withdrawn into the actuator 128, the reaction is to rotate the 12 ¦ cylinder 112 in a clockwise direction, as indicated in 13 ¦ dash-line fashion in FIG. 70 A similar actuator is disposed .
141 on the opposite side of frame 108 to operate the shaft 114 lS¦ and thus simultaneously rotate the cylinder 110 in the opposite .
16¦ direction from the direction of rotation of the cylinder 112.
17¦ Between the.frames 108 and 109, a second.needle 132 is - ¦:
18¦ .mounted in a downwardly extending portion 131 of the frame so as ~91 to project beneath the frame and normal to a hypothetical plane .
20¦ lying tangent to the corresponding portions of the curved 21 surfaces of the cylinders 110 and 112. ~ hlock of foam 134 ~
22¦ surrounds the needle 132. 1.
. 231 The adjustability of the spacing between the cylindrical 24 elements, such as the elements 110, along their axis of rotation allows workpieces of different shapes and sizes to be 26 accommodated. .
~27 In operation,.the differentiating head 26 i~s 28 lowered ~y Ineans oi- the carriage transfer mechanism, as 2 describe~ in greater detail above, onto the top iayer 20 of .
. .
31 . .
3 .
. . .
-14- - : :
. '' . . 1,: ':
~ 1079315 ~:~
the stack 10 of fabric piec~x on the elevator 12. The ~oam 2 122 on the cylinders 110 and 112 as well as the foam hlock ,. ~.
3 134 are slightly cGmpressed and the pne~matic actuator 128 4 ¦ and its corresponding counterpart on the opposite side of the frame, 108, are actuated to counter-rotate the 6 ¦ cylinders 110 and 112 so as to drive the needles 120 into 7 ¦ the topmost fabric layer. Because of the eccentric mountiny ¦ of the cylinders 110 and 112 on the shafts 114 and 116 a more 9 ¦ favorable orbit of motion for the needles is thereby obtained than lf the cylinders were centrally mounted. This eccentric 11 needle movement gives a more favorable angle of penetration, -12 ¦ i.e., nearly perpendicular to the top layer 20 by the needle 13 120. The needle 120 is also swung with less vertical displacement 14 when it is nearly parallel with the stack layers thereby ' providing a hooking action.
16 Because of the location of the cylinclers 110 and -17 112, being adjusted to be close to the edges of the fabric 18 layer 118r the counter-rotation of the cylinders tellds to 19 curl up the edges of the topmost layer, thereby breaklng -20 the bond of interlocking threads which would otlierwise hold ;
it to the next most fa~ric layer. The effect is a 22 stretching of the topmost layer in addition to curling the
23 edges. The purpose of the stationary needle 132 is to
24 `prevent any misalignment of the topmost fabric layer as it
25 lS being differentiated. Once the interlockinc3 thread ~ond 2bl is broken by the action of the needles! 120, the ;~ ¦ differentiating head 24 is raisea to carry away the topmost 28 layer. -After the differentiating head is positioned and ~ -29 lowered onto the stack on the appropriate receiving elevator ;~
30 .16, the actuators, such as actuator 128, are operated in ~2 .. "' . ,, . ~',''"'"',' . ' '~
I the reverse direction to exLend their shafts 126, tllereby 2 counter-rotating the cylinders 110 and 11? in ~he rcverse 3 direction from the previous operation to tl~creby witl~(lr~ ' 4 ~ the needles 120 fro~ the topmost layer 20 of ral~ric ancl S ! release it. ~t this point, the resiliency of the foam 6 ¦ layers 122 and 134 aids in separating the fabric from 7 ¦ the needles and releases.the topmost layer 20 onto the top 8 ¦ of the stack carried by the.elevator 16. ~s mentioned 9 ¦ previously, upon the removal of the topmost layer 20 from 10 ¦ the stack 10 carried by the ele.v~tor 12, the photo cells 104 ,11 ¦ will cause the stack to index upwardly by a distance equal 12 to approximately the thickness of one layer of tile fabric.
13 ¦ The photo cells 104 which control the positioning of the ,., 14 ¦ elevator 16 will cause the elevator.to in~ex downwardly by 15 ¦ the distance approximately equal to the newly ~eposited top-16 most layer 20 released by the differentiating head 26.
17 ¦ The control of the differentiating head actuators 18 ¦ 128 is done by ,the tin~ing disc mechanism referred to,above 19 ¦'~but not shown). It should be understood that in other .
20 ¦ embodiments other types of controls may be used, such as 21 ¦ contacting switches and photo-optic sen'sors.
22 ¦ Referring now more particularly to FI.G. 11, the :
231 facing ply separator o~ tho invention when used in 24 ¦ conjunction with an assembly line garment manufacturing : ~
25 I system is illustrated. In this application, the facing ply : . :
30 .16, the actuators, such as actuator 128, are operated in ~2 .. "' . ,, . ~',''"'"',' . ' '~
I the reverse direction to exLend their shafts 126, tllereby 2 counter-rotating the cylinders 110 and 11? in ~he rcverse 3 direction from the previous operation to tl~creby witl~(lr~ ' 4 ~ the needles 120 fro~ the topmost layer 20 of ral~ric ancl S ! release it. ~t this point, the resiliency of the foam 6 ¦ layers 122 and 134 aids in separating the fabric from 7 ¦ the needles and releases.the topmost layer 20 onto the top 8 ¦ of the stack carried by the.elevator 16. ~s mentioned 9 ¦ previously, upon the removal of the topmost layer 20 from 10 ¦ the stack 10 carried by the ele.v~tor 12, the photo cells 104 ,11 ¦ will cause the stack to index upwardly by a distance equal 12 to approximately the thickness of one layer of tile fabric.
13 ¦ The photo cells 104 which control the positioning of the ,., 14 ¦ elevator 16 will cause the elevator.to in~ex downwardly by 15 ¦ the distance approximately equal to the newly ~eposited top-16 most layer 20 released by the differentiating head 26.
17 ¦ The control of the differentiating head actuators 18 ¦ 128 is done by ,the tin~ing disc mechanism referred to,above 19 ¦'~but not shown). It should be understood that in other .
20 ¦ embodiments other types of controls may be used, such as 21 ¦ contacting switches and photo-optic sen'sors.
22 ¦ Referring now more particularly to FI.G. 11, the :
231 facing ply separator o~ tho invention when used in 24 ¦ conjunction with an assembly line garment manufacturing : ~
25 I system is illustrated. In this application, the facing ply : . :
26 I separator is used to feed alternately facing plies tc> the :'::
27 input to the assembly'line system as well as provicl.ing a i8 stack of plies all o~ which are of one type. This is in con-29 trast tG the appar,atus .descrlbed above in reference to l¦ FIG. 1 in wl~LFh the single rain feed stack was divide~ into ¦
~ . '.:
~'.. ' ,' -16- ' . ., ~7~
two separate stacks of same type plies. As shown in FIG. 11, the facing ply separator apparatus 136 of the type descrLbed above, differentiates the topmost layer of the main feed stack 10 and sequentially and alternately places the differentiated topmost layer onto the stack carried by the receiving elevators 16 and onto a registration table 142. The registration table 142 is, in effect, a transparent glass, horizontal plane carried by a servo mechanism 138. Stationary photo-optic sensors (not shown) control the servo mechanism 138 to position the table 142 such that the workpiece 140 deposited by the facing ply ~epar-ator 136 onto the table 142 is precisely positioned with respect to a vacuum transfer mechanism 144. The transfer mechanism 144 then reciprocates horizontally to place the separated piece 140 at one input to the assembly line apparatus, the remainder of which is not shown in FIG. 11. The registration table 138 and the carriage transfer mechansim 144 are not described in detail since such mechanisms are generally well known. See, for example, U.S. Patents Nos. 3,548,196 granted on December 15, 1970 to Ivanhoe Research Corporation and 3,442,505 granted on May 6, 1969 to Ivanhoe Research Corporation. By this manner of placing one ply into a separate stack and the other ply onto the feeding~ means of a processing machine directly re-stacking of the one half of the separated material is thereby avoided.
Referring now more particularly to FIGS. 12A - 12H, inclusive, a modification of the differentiating head depicted in FIGS. 7 - 10 is illustrated. Similar elements have been ~ -assigned corresponding reference numerals, primed. The basic differentiating head depicted in the modified embodimen~ is essentially the same as that depicted in FIGS. 8 - 10, with the exception of the center needle 132'. The center needle 132' .
~ - 17 -,, . - - , . . . .
3~L~
,,~
is for the purpose of fiY.il~-J the position of Lhc top~ost- laycr l 20 with respect to the rotatable cylinders 110' an~ 112' 3 ¦ during the separation process, therehy prcventing any m;salignlnent 4 of the topmost layer 20 eitl-er during separation or (]uring its 5 ¦ release upon the separated workpiece piles.
6 ¦ The center needle 132' in the modified embo~im~nt is 7 ¦ mounted on the end of a shaft 202 which projects from a vcrtical 8 ¦ arm 200. The arm 200 may be attached to the frame 22 (see FIG. 8) 9 ¦ or it may be independently mounted. In any case, the arm 200 is 10 ¦ raised and lowered simultaneously w:ith the rotatable cylinders 11 ¦ 110' and 112' during tile separation process. A stripper 204 is 12 coaxially mounted about thè shaft 202 and is slida~le on the 13 I shaft 202 between a first position in which the needle 132' is 14¦ unsheathed so that it can penetrate the topmost layer 20 an~ a ~51 second position, shown in FIG. 12H, in which the needle 132 is 16¦ covered by the lower end of the stripper 204. The action of the 17¦ stripper 204 may be either ~y simple gravity and inertia or it 18 may be air cylinder actuated or spring loaded.
19 The operation of this modified embodiment is depicted in I
201 the sequence of drawings in FIGS. 12A - 12H. In FIG. 12~, the 21¦ differentiating head has been lowered onto the topmost layer 20 22¦ and the needle 132' has penetrated the topmost layer 20 and the 231 stripper 204 has been lifted to its uppermost position by the 2~ force of the abric 20 against the lower edge of the stripper 204.
2~1 In FIGS. 12B and 12C, the rotatable cylinders 110' and il2' have 26¦ been counter-rotated to engage the topmost layer 20 and to curl ~27 its outer edges up and away from the correspondinc3 eclges of the
~ . '.:
~'.. ' ,' -16- ' . ., ~7~
two separate stacks of same type plies. As shown in FIG. 11, the facing ply separator apparatus 136 of the type descrLbed above, differentiates the topmost layer of the main feed stack 10 and sequentially and alternately places the differentiated topmost layer onto the stack carried by the receiving elevators 16 and onto a registration table 142. The registration table 142 is, in effect, a transparent glass, horizontal plane carried by a servo mechanism 138. Stationary photo-optic sensors (not shown) control the servo mechanism 138 to position the table 142 such that the workpiece 140 deposited by the facing ply ~epar-ator 136 onto the table 142 is precisely positioned with respect to a vacuum transfer mechanism 144. The transfer mechanism 144 then reciprocates horizontally to place the separated piece 140 at one input to the assembly line apparatus, the remainder of which is not shown in FIG. 11. The registration table 138 and the carriage transfer mechansim 144 are not described in detail since such mechanisms are generally well known. See, for example, U.S. Patents Nos. 3,548,196 granted on December 15, 1970 to Ivanhoe Research Corporation and 3,442,505 granted on May 6, 1969 to Ivanhoe Research Corporation. By this manner of placing one ply into a separate stack and the other ply onto the feeding~ means of a processing machine directly re-stacking of the one half of the separated material is thereby avoided.
Referring now more particularly to FIGS. 12A - 12H, inclusive, a modification of the differentiating head depicted in FIGS. 7 - 10 is illustrated. Similar elements have been ~ -assigned corresponding reference numerals, primed. The basic differentiating head depicted in the modified embodimen~ is essentially the same as that depicted in FIGS. 8 - 10, with the exception of the center needle 132'. The center needle 132' .
~ - 17 -,, . - - , . . . .
3~L~
,,~
is for the purpose of fiY.il~-J the position of Lhc top~ost- laycr l 20 with respect to the rotatable cylinders 110' an~ 112' 3 ¦ during the separation process, therehy prcventing any m;salignlnent 4 of the topmost layer 20 eitl-er during separation or (]uring its 5 ¦ release upon the separated workpiece piles.
6 ¦ The center needle 132' in the modified embo~im~nt is 7 ¦ mounted on the end of a shaft 202 which projects from a vcrtical 8 ¦ arm 200. The arm 200 may be attached to the frame 22 (see FIG. 8) 9 ¦ or it may be independently mounted. In any case, the arm 200 is 10 ¦ raised and lowered simultaneously w:ith the rotatable cylinders 11 ¦ 110' and 112' during tile separation process. A stripper 204 is 12 coaxially mounted about thè shaft 202 and is slida~le on the 13 I shaft 202 between a first position in which the needle 132' is 14¦ unsheathed so that it can penetrate the topmost layer 20 an~ a ~51 second position, shown in FIG. 12H, in which the needle 132 is 16¦ covered by the lower end of the stripper 204. The action of the 17¦ stripper 204 may be either ~y simple gravity and inertia or it 18 may be air cylinder actuated or spring loaded.
19 The operation of this modified embodiment is depicted in I
201 the sequence of drawings in FIGS. 12A - 12H. In FIG. 12~, the 21¦ differentiating head has been lowered onto the topmost layer 20 22¦ and the needle 132' has penetrated the topmost layer 20 and the 231 stripper 204 has been lifted to its uppermost position by the 2~ force of the abric 20 against the lower edge of the stripper 204.
2~1 In FIGS. 12B and 12C, the rotatable cylinders 110' and il2' have 26¦ been counter-rotated to engage the topmost layer 20 and to curl ~27 its outer edges up and away from the correspondinc3 eclges of the
28¦ next succee~ing layer in the stack 10. The rotata~le cylin~ers
29 110' and 112' are lifted upwardly with respect to the arm 200 ~30 . ' .
~ -18~
3~i 1 which causes'the topmost l;l~r!r 20 to b~nd around th,e projectin~
2 needle 132', thereby further aiding the separatioJl of the topmost 3 ¦ layer 20 as best shown in FIG. 12D.
4 . In FIG. 12E the dlfferentiating head has separated tlle , topmost layer 20 and moves it to either the first or the ~econd 6 location in the mann~r described above for the primary embodiment.
7 In FIG. 12F, the differentiating head has depositecl the 8 topmost layer 20 onto one of the receiving el~vators 16 or 18 and 9 is about to disengage the rotatable cylinders 110' and 112'. The 10 disengagement of the rotatable cylinders 110' and 112' is accom- .
ll plished by counte'r-rotation as is shown in FIG. 12G. The differen-12 tiating head is then lifted clear of the receiving elevator and 13 the inertia of the stripper 204 causes it to slicle to its lowermost , 14 pOSitiOII on the shaft 202 thereby forcing the topmost layer 20 15 ciear of the needle 132' to complete the differentiation process.
16 It should be apparent that in other embodiments the ~ ' 17 stripper 204 may be stationary with respect to the arm 200 and 18 the shaft 202 may be withdrawable up into the arm 200. It is ~l9 the sheathing and unsheathing of the needle 132' which the applicant reyards as his invention.
21 Referring now more part,icularly to FIGS. 13A - 13F, still , 22 a further modification of the embodiment depicted in FIGS. 12~ -23 121~ is illustrated. In thi's embodiment, the differentiation of 24 the topmost layer ls aided by a pair of separating rods 206. The separating,rods 206 are mounted parallel to the rotatable 2 cyllnders 110' ancl 112'. The rods 206 can be supported by a ' 27 ~lever arm or simply can extend through horizontal slots 208 in 28 a pair of'horizontal members 210 positioned at opposite ends of 29 the cylinders ll0l' and 112' 50 as to straddle the cylinders, 31 as best shown in PIG. 13~.
32 ' ' , ' ;~ ~ ' ~
'`' . ' , -19-7~3~
I¦ The frarne ~embers 210 are ;~ached to the differcntiating h~ad 2 I frame ~2. Thus, the separating rods 206 ~r~ slida~le hori~oll~all~
3 ¦ in the slots 208 in a plane ~hich is parallel to the topmost 4 I workpiece 20. The separating rods 206 are biase~ toward thcir outermost positions, as best shown in FIG. 13G, by tension 6 ¦ springs 212 which are attached to l:he frame members 210.
7 A further difference from the emhodiment depicted in FI~S.
8 12~ - 12H is that the rotatable cylinders 110' and 112' are 9 movable ver.tically somewhat independently of the center needle 132'. .To accomplish this, the vertical rod 200 which carries ll the needle 132' forms'the end of a plunger in a hydraulic or 12 pneumatic actuator 213 which, in turn, is attached to the frarne 13 22 of the differentiating head. The operation of this modified embodiment is best depicted'in FIGS. 13A - 13F. l~he differentiat-lS ing head is first lowered onto the topmost layer 20 of the feed 16 stack as viewed in FIG... 13A. The rotatable cylinders 110' and .
17 112' are then counter-rotated to engage the needles 120' in the 18 ;workpiece 20. The differentiating he~d is then raised vertically 19 slightly while the actuator 213 is caused to extend .the needle 132' downwardly so as' to remain in contact with thc laycr 20 on 21 top of the stack 10. Simultaneously with the ralsing of the 22 rotatable cylinders 110' and 112', the workpiece 20 is caused . . . ..
23 to bend around the separating rods 206 and to thereby exert a ~:
24 force inwardly towards the needle 132' on the rods 206. As this '-process continues, the rods 2'06 are drawn toward the center of 26 ¦ the workpiece 20 and the needle 132', as best shown in FIGS. 13D
27 ¦ and 13E. All dur:ing this time, the'actuator 213 causes the : -28 ¦ needle 132' to press the center of the workpiece 20 agai.llst the -;.
topmost.layer of lhe ~stack 10. Ultimately, the differentiating 31 . . ~': '.
32 : ' ' . . .' , . ' . . . ,.' ~ -20- .
~; . . ;''' 3~$
l I head lifts the cylinders 1~' and 112' together with the center 2 needle assembly 132' and the workplece 20 free of the stack 10 3 as s}lown in FIG. 13F.
4 ¦ The differentiatin~ head releases t)~c separated w~rkpiece ¦ 20 on one of the receiving elevators, 16 or 18 ~y simply reversing 6 ¦ the a~ove described process. ~s in the em~odlmcnts dcpicted in 7 FIGS. 12~ - 12H, when the needle 132' is withdrawn from tlle 8¦ topmost workpiece 20 after its release the stripping mem~er 204, 91 either by inertia or by spring force, strips the work~iece 20 ~¦ from the end of the needle 132' to aid in the separation.
11 Referring now more particularly to FIGS. 14~ - 19F, still 12¦ another variation of the embodiment depicted in FIGS. 12~ - 1211 13 is illustrated. The primary difference between this ernbodiment '41 and the embodiment depicted in FIGS. 12A - 12H is that the 151 rotatable cylindrical elements 110' and 112' not only are 16 countex-~otated to engage or disen~age the topmost wor~piece 20, 17¦ but they are simultaneously moved closer or further away from 18¦ , each other during engagement and disengagement with the ~9¦ workpiece 20, respectively. Thus, as best shown in FIGS. 14B - ~ -~
~ol -14E, after the differentiating head is lowered onto the topmost 21¦ workpiece 20 the cylinders ~10' and 112' are counter-rotated 22¦ to engage the needles 120' in the topmost workpiece 20 while at 231 the same *ime the cylinders are rolled closer to each other 241 toward the cènter of the workpiece 20 at the neeclle 132'. When the c~linders 110' and 112' have reached a predetermilled spacing 2~1 immediately adjacent to the needle 132', the differentiatin~ head 271 lifts up with the workpiece 20 having its opposite ends rolled 2~1 around the cylinders 110' and 112i. The mechanism by which the 2~1 cylinders 110' and 112' are moved and simultaneously rotated is 301 illustrated in FIG. 14F. It should be understood that this is . ' . .
~- -21-. ' . ',:'' ' - .: , - . . . . . . . . . ..
. .. ,. . , . , .. : . .: , . :
~07~313~
l ¦ simply an example of one suitable mechanisrn for moving and 2 ¦ rotating the cylinders and numerous other types of mechanlsms 3 ¦ will undoubtedly be apparent to those having ordinary skills in 4 the art. It is the type of movement of the cyllnders 110' and 5 ¦ 112' which the applicant regards as his invention rather than 6 ¦ the specific mecl-anism for carrying out this rnovement.
7 ¦ ~s shown in FIG. 14F, the cylinders llOi and 112' are ~8 I mounted on symmetric, axial shafts-114' and 116', respect:ively.
9 ¦ It will be noted that the shafts 114' and 116' are not mounted 10 ¦ in the cylinders 110' and 112' eccentric~lly as is disclosed 11 in the pr.imary embodiment. A modifica-tion to allow an eccentric 12 I rotatable mounting would be apparent to those skilled in the art, 13 I however, it will be omitted for the sake of clarity in this ' 14 I description~ The shafts 114' and 116' are carried in a 15¦ hori~ontal slot 214 in a horizontal frame memher 216 which is :
16¦ attached to the differentiating head 22. It will be appreciated 17¦ that a frame memb'er 216 is positioned at each end of the shafts 18 114' and 116' in order to support the cylinders 110' and 112'. ' ~1 A gear 218 is mounted at one end of each of the shafts 20l 114' and 116'. Each 'gear 218 engages a separate rack member 220 ?l ¦ which is attached to the end of a plunger of a separate pneumatic 22¦ actuator 222 mounted on one of the frame members 216. The .~31 pneumatic actuators 222'are two-way acting. ~7hen they are ~4¦ caused to retract, the rack members 220 move toward the center ¦ of the'workpiece 20, that is toward the member 20n ~hich is ~ -~2~ centered between the cylinders 110' and 112'. The actuators 222 27 are simultaneously operated to ~hereby simultaneou.sly counter- -I '~8 rotate the cylinders 110' and 112' and roll them towards each ~-29 other. In order to disengage the cylinders 110' and 112' from '~
301 '' ' ;;~'' 311 ~ ' ' ~32 ~ ~"'"' ''~
~ ~ , '' ' . '~
~ ' -22--; ~ '` , ''`
.. . ...... . ...... ... .. .. ..... . .. .. . . . .. .
93~5 1¦ th~ workpiece 20, of course, the actuators 222 ~re operated to 2 ¦ extend their rack rnembers 220 and thereby counter-rotate the ' 3 cylinders 110' and 112' away from each other. ~5 mentioned 4 I a~ove, it will be a~parent that numerous other rnodifications for accomplishing the same objective will be readily apparent 61 to those skilled in the art and the applicant makes no claim of 71 invention to the particular mechanism for carrying out this 81 operation. ' 91 The cylinders 110' and 112' shown in FIG. 14F are of 10¦ exaggerated size for aid in the illustration. In actual practice, ¦
11¦ the cylinders 110' and 112' would be of a relatively small 12 diameter to allow the workpiece 20 to be rolled thereon.
13¦ Referring now mQre,particularly to FIGS. 15~ - 15~, still 14¦ another embodiment of the invention is illustrated. ~leretofore, 15¦ the differentiating head was moved by a transfer carriage .
16 mechanism in order to sort the elifferentiated workpieces into two 71 separate piles. In the next series of embodiments, including the la embodiment depicted in FIGS. 15A - 15F, the differentiating 19¦ head remalns in relatively close proximity to the feed stack 10. , 201 The separated workpieces are transferred sequentially to;the ` 21¦ first and second locations by means of a conveyor type belt. ~uc 22¦ a belt may have a gripper thereon or may be a va,cuum operated 231 ~elt of the type'which is well known to those skilled in the ~,, , 2~1 making of automated,garment manufacturing devices. -251 ln this embodimentj the differentiating head has a slngle 261 rotatable cylindrical element 224 having a projecting needle 271 120'. The cylindrical'element 224 is positioned at one edge of 28¦ the fabric ply stack 10. ~ separating rod 226 is located , , ~29 immediately adjace~t to the cylinder 224 on the side opposite 301 ' , " , 3l I - . ' 32 ' , '''' ~ ' ' r 1 ~ 2 3--. . ' . ~
. - . . .
: . . . .
10'~ L5 1 to the edge. During separa~ion the cyl.indrical elem~nt 224 is 2 ¦ rotated, as for example, in a clockwlse direction sho~n in FIG.
3 15s to engage the needle 120' in the edge of the top~ost fabric ¦ workpiece 20. This.curls up the edge of tlle ~or~piece 20.
clamp 228 is rotated in a clockwise direction to hold ~own the 6 remaining edges of the feed stack 10.
7 I The cylindrical element 224 is then caused to move in an 8 arc, as sho-~n in FIG. 15C, up and over the separatin(~ rocl 226 and ..9 then passes horizontally across the top of the feed .stack 10.
The separating rod 226 can be mounted ~n a framework siMilar to .
1l that shown in FIG. 13G so that the separating rod 226 is sprinCJ
12 ¦ biased against the drawing force of the workpiece 20. Causing :
13 the workpiece 20 to bend around the separatiny rod 226 and to 14 move the separating rod 226 across the fabric stack aids greatly lS in the separation by producing a movable bend in the fabric 16 which disengages the threads of the workpiece 20 from the under-17 lying layer. It will be apparent that the movement of the ]8 separating rod 226 is one half the speed of the movement of the 19¦ rotatable cylinder 224 in traveling across the top of the fabric 201 stack; :
~1 The rotatable cylinder 224 delivers the curled up end of 22¦ the ~orkpiece 20 to a vacuum transfer belt 230 positioned above 23¦ and to one side of the fabric stack 10. The vacuum grips the l;~
24 workpiece 20. through.holes 232 in the belt in the manner well : :~
25 understood by those skilled in the art as the cylinder 224 is. .:
2b¦ simultaneously rotated counterclockwise to disengaye its needles ,..
271 120.' from the workpiece. On the return stroke of the cylinder 281 224, it presses the workpiece 20 up and in contact with.
2~1 the vacuum belt 230. ~imultaneously the separating rod 226
~ -18~
3~i 1 which causes'the topmost l;l~r!r 20 to b~nd around th,e projectin~
2 needle 132', thereby further aiding the separatioJl of the topmost 3 ¦ layer 20 as best shown in FIG. 12D.
4 . In FIG. 12E the dlfferentiating head has separated tlle , topmost layer 20 and moves it to either the first or the ~econd 6 location in the mann~r described above for the primary embodiment.
7 In FIG. 12F, the differentiating head has depositecl the 8 topmost layer 20 onto one of the receiving el~vators 16 or 18 and 9 is about to disengage the rotatable cylinders 110' and 112'. The 10 disengagement of the rotatable cylinders 110' and 112' is accom- .
ll plished by counte'r-rotation as is shown in FIG. 12G. The differen-12 tiating head is then lifted clear of the receiving elevator and 13 the inertia of the stripper 204 causes it to slicle to its lowermost , 14 pOSitiOII on the shaft 202 thereby forcing the topmost layer 20 15 ciear of the needle 132' to complete the differentiation process.
16 It should be apparent that in other embodiments the ~ ' 17 stripper 204 may be stationary with respect to the arm 200 and 18 the shaft 202 may be withdrawable up into the arm 200. It is ~l9 the sheathing and unsheathing of the needle 132' which the applicant reyards as his invention.
21 Referring now more part,icularly to FIGS. 13A - 13F, still , 22 a further modification of the embodiment depicted in FIGS. 12~ -23 121~ is illustrated. In thi's embodiment, the differentiation of 24 the topmost layer ls aided by a pair of separating rods 206. The separating,rods 206 are mounted parallel to the rotatable 2 cyllnders 110' ancl 112'. The rods 206 can be supported by a ' 27 ~lever arm or simply can extend through horizontal slots 208 in 28 a pair of'horizontal members 210 positioned at opposite ends of 29 the cylinders ll0l' and 112' 50 as to straddle the cylinders, 31 as best shown in PIG. 13~.
32 ' ' , ' ;~ ~ ' ~
'`' . ' , -19-7~3~
I¦ The frarne ~embers 210 are ;~ached to the differcntiating h~ad 2 I frame ~2. Thus, the separating rods 206 ~r~ slida~le hori~oll~all~
3 ¦ in the slots 208 in a plane ~hich is parallel to the topmost 4 I workpiece 20. The separating rods 206 are biase~ toward thcir outermost positions, as best shown in FIG. 13G, by tension 6 ¦ springs 212 which are attached to l:he frame members 210.
7 A further difference from the emhodiment depicted in FI~S.
8 12~ - 12H is that the rotatable cylinders 110' and 112' are 9 movable ver.tically somewhat independently of the center needle 132'. .To accomplish this, the vertical rod 200 which carries ll the needle 132' forms'the end of a plunger in a hydraulic or 12 pneumatic actuator 213 which, in turn, is attached to the frarne 13 22 of the differentiating head. The operation of this modified embodiment is best depicted'in FIGS. 13A - 13F. l~he differentiat-lS ing head is first lowered onto the topmost layer 20 of the feed 16 stack as viewed in FIG... 13A. The rotatable cylinders 110' and .
17 112' are then counter-rotated to engage the needles 120' in the 18 ;workpiece 20. The differentiating he~d is then raised vertically 19 slightly while the actuator 213 is caused to extend .the needle 132' downwardly so as' to remain in contact with thc laycr 20 on 21 top of the stack 10. Simultaneously with the ralsing of the 22 rotatable cylinders 110' and 112', the workpiece 20 is caused . . . ..
23 to bend around the separating rods 206 and to thereby exert a ~:
24 force inwardly towards the needle 132' on the rods 206. As this '-process continues, the rods 2'06 are drawn toward the center of 26 ¦ the workpiece 20 and the needle 132', as best shown in FIGS. 13D
27 ¦ and 13E. All dur:ing this time, the'actuator 213 causes the : -28 ¦ needle 132' to press the center of the workpiece 20 agai.llst the -;.
topmost.layer of lhe ~stack 10. Ultimately, the differentiating 31 . . ~': '.
32 : ' ' . . .' , . ' . . . ,.' ~ -20- .
~; . . ;''' 3~$
l I head lifts the cylinders 1~' and 112' together with the center 2 needle assembly 132' and the workplece 20 free of the stack 10 3 as s}lown in FIG. 13F.
4 ¦ The differentiatin~ head releases t)~c separated w~rkpiece ¦ 20 on one of the receiving elevators, 16 or 18 ~y simply reversing 6 ¦ the a~ove described process. ~s in the em~odlmcnts dcpicted in 7 FIGS. 12~ - 12H, when the needle 132' is withdrawn from tlle 8¦ topmost workpiece 20 after its release the stripping mem~er 204, 91 either by inertia or by spring force, strips the work~iece 20 ~¦ from the end of the needle 132' to aid in the separation.
11 Referring now more particularly to FIGS. 14~ - 19F, still 12¦ another variation of the embodiment depicted in FIGS. 12~ - 1211 13 is illustrated. The primary difference between this ernbodiment '41 and the embodiment depicted in FIGS. 12A - 12H is that the 151 rotatable cylindrical elements 110' and 112' not only are 16 countex-~otated to engage or disen~age the topmost wor~piece 20, 17¦ but they are simultaneously moved closer or further away from 18¦ , each other during engagement and disengagement with the ~9¦ workpiece 20, respectively. Thus, as best shown in FIGS. 14B - ~ -~
~ol -14E, after the differentiating head is lowered onto the topmost 21¦ workpiece 20 the cylinders ~10' and 112' are counter-rotated 22¦ to engage the needles 120' in the topmost workpiece 20 while at 231 the same *ime the cylinders are rolled closer to each other 241 toward the cènter of the workpiece 20 at the neeclle 132'. When the c~linders 110' and 112' have reached a predetermilled spacing 2~1 immediately adjacent to the needle 132', the differentiatin~ head 271 lifts up with the workpiece 20 having its opposite ends rolled 2~1 around the cylinders 110' and 112i. The mechanism by which the 2~1 cylinders 110' and 112' are moved and simultaneously rotated is 301 illustrated in FIG. 14F. It should be understood that this is . ' . .
~- -21-. ' . ',:'' ' - .: , - . . . . . . . . . ..
. .. ,. . , . , .. : . .: , . :
~07~313~
l ¦ simply an example of one suitable mechanisrn for moving and 2 ¦ rotating the cylinders and numerous other types of mechanlsms 3 ¦ will undoubtedly be apparent to those having ordinary skills in 4 the art. It is the type of movement of the cyllnders 110' and 5 ¦ 112' which the applicant regards as his invention rather than 6 ¦ the specific mecl-anism for carrying out this rnovement.
7 ¦ ~s shown in FIG. 14F, the cylinders llOi and 112' are ~8 I mounted on symmetric, axial shafts-114' and 116', respect:ively.
9 ¦ It will be noted that the shafts 114' and 116' are not mounted 10 ¦ in the cylinders 110' and 112' eccentric~lly as is disclosed 11 in the pr.imary embodiment. A modifica-tion to allow an eccentric 12 I rotatable mounting would be apparent to those skilled in the art, 13 I however, it will be omitted for the sake of clarity in this ' 14 I description~ The shafts 114' and 116' are carried in a 15¦ hori~ontal slot 214 in a horizontal frame memher 216 which is :
16¦ attached to the differentiating head 22. It will be appreciated 17¦ that a frame memb'er 216 is positioned at each end of the shafts 18 114' and 116' in order to support the cylinders 110' and 112'. ' ~1 A gear 218 is mounted at one end of each of the shafts 20l 114' and 116'. Each 'gear 218 engages a separate rack member 220 ?l ¦ which is attached to the end of a plunger of a separate pneumatic 22¦ actuator 222 mounted on one of the frame members 216. The .~31 pneumatic actuators 222'are two-way acting. ~7hen they are ~4¦ caused to retract, the rack members 220 move toward the center ¦ of the'workpiece 20, that is toward the member 20n ~hich is ~ -~2~ centered between the cylinders 110' and 112'. The actuators 222 27 are simultaneously operated to ~hereby simultaneou.sly counter- -I '~8 rotate the cylinders 110' and 112' and roll them towards each ~-29 other. In order to disengage the cylinders 110' and 112' from '~
301 '' ' ;;~'' 311 ~ ' ' ~32 ~ ~"'"' ''~
~ ~ , '' ' . '~
~ ' -22--; ~ '` , ''`
.. . ...... . ...... ... .. .. ..... . .. .. . . . .. .
93~5 1¦ th~ workpiece 20, of course, the actuators 222 ~re operated to 2 ¦ extend their rack rnembers 220 and thereby counter-rotate the ' 3 cylinders 110' and 112' away from each other. ~5 mentioned 4 I a~ove, it will be a~parent that numerous other rnodifications for accomplishing the same objective will be readily apparent 61 to those skilled in the art and the applicant makes no claim of 71 invention to the particular mechanism for carrying out this 81 operation. ' 91 The cylinders 110' and 112' shown in FIG. 14F are of 10¦ exaggerated size for aid in the illustration. In actual practice, ¦
11¦ the cylinders 110' and 112' would be of a relatively small 12 diameter to allow the workpiece 20 to be rolled thereon.
13¦ Referring now mQre,particularly to FIGS. 15~ - 15~, still 14¦ another embodiment of the invention is illustrated. ~leretofore, 15¦ the differentiating head was moved by a transfer carriage .
16 mechanism in order to sort the elifferentiated workpieces into two 71 separate piles. In the next series of embodiments, including the la embodiment depicted in FIGS. 15A - 15F, the differentiating 19¦ head remalns in relatively close proximity to the feed stack 10. , 201 The separated workpieces are transferred sequentially to;the ` 21¦ first and second locations by means of a conveyor type belt. ~uc 22¦ a belt may have a gripper thereon or may be a va,cuum operated 231 ~elt of the type'which is well known to those skilled in the ~,, , 2~1 making of automated,garment manufacturing devices. -251 ln this embodimentj the differentiating head has a slngle 261 rotatable cylindrical element 224 having a projecting needle 271 120'. The cylindrical'element 224 is positioned at one edge of 28¦ the fabric ply stack 10. ~ separating rod 226 is located , , ~29 immediately adjace~t to the cylinder 224 on the side opposite 301 ' , " , 3l I - . ' 32 ' , '''' ~ ' ' r 1 ~ 2 3--. . ' . ~
. - . . .
: . . . .
10'~ L5 1 to the edge. During separa~ion the cyl.indrical elem~nt 224 is 2 ¦ rotated, as for example, in a clockwlse direction sho~n in FIG.
3 15s to engage the needle 120' in the edge of the top~ost fabric ¦ workpiece 20. This.curls up the edge of tlle ~or~piece 20.
clamp 228 is rotated in a clockwise direction to hold ~own the 6 remaining edges of the feed stack 10.
7 I The cylindrical element 224 is then caused to move in an 8 arc, as sho-~n in FIG. 15C, up and over the separatin(~ rocl 226 and ..9 then passes horizontally across the top of the feed .stack 10.
The separating rod 226 can be mounted ~n a framework siMilar to .
1l that shown in FIG. 13G so that the separating rod 226 is sprinCJ
12 ¦ biased against the drawing force of the workpiece 20. Causing :
13 the workpiece 20 to bend around the separatiny rod 226 and to 14 move the separating rod 226 across the fabric stack aids greatly lS in the separation by producing a movable bend in the fabric 16 which disengages the threads of the workpiece 20 from the under-17 lying layer. It will be apparent that the movement of the ]8 separating rod 226 is one half the speed of the movement of the 19¦ rotatable cylinder 224 in traveling across the top of the fabric 201 stack; :
~1 The rotatable cylinder 224 delivers the curled up end of 22¦ the ~orkpiece 20 to a vacuum transfer belt 230 positioned above 23¦ and to one side of the fabric stack 10. The vacuum grips the l;~
24 workpiece 20. through.holes 232 in the belt in the manner well : :~
25 understood by those skilled in the art as the cylinder 224 is. .:
2b¦ simultaneously rotated counterclockwise to disengaye its needles ,..
271 120.' from the workpiece. On the return stroke of the cylinder 281 224, it presses the workpiece 20 up and in contact with.
2~1 the vacuum belt 230. ~imultaneously the separating rod 226
30 returns to its original position by the force of the spring
31 attached to it~ While a particular type of transfer belt is : - :
32 .
. ' ' , . ,','.''': ' ~:~` .-24-. .:.
. ' ' , , ' 3~$
1 illustrated, it should ~e apparent th~t other suitahle ty~es of '2 transfer belts may be utilized such as belts h~viny c~m operated 3 grippers thereon.
4 Onç feature o$ this embodiment which is not disclosed in the embodiments described heretofore, is that ~llile the workpiece 6 20 is separated from the stack 10 it is also inverted. The ~ delivery of the separated and inverted workplece to one of t~o 8 locations by the belt 230 i~ under separate control. The vacu~m .-9 ¦ on the belt'over the first and second locations is alternately 10 ¦ and sequentially closed off to cause the pieces to be dropped in 11 succession at the first location and then the second location.
12 Still another embodiment which both'separates the topmost 13 ¦ workpiece and inverts it, is illustrated in FIG~S. 16~- 16F. In 14¦ this embodiment, the rotatable cylindrical elements 110' and 112' are mounted on separate swing arms 234 and 236, respectively.
16 The swing arms, in turn, `are each attached at one end to separate 17 horizontal rotatable shafts 238 and 240. The mechanism for 18 rotating the rotatable cylinders 110' and 112' can be ~hose 191 shown in the previously described embodiment de~icted in ~I~7S. 8 -10. Alternatively, the cylinders may be rotated ~y separate 21 servo motors. The shafts 238 and 240 can he rotated by means of ¦ ' 22¦ pneumatic actuato~rs operating through cranks or they may be 231 operated by still further servo motors or pneumatic actuators.
¦ Since the mechanism for accomplishing these various movements ' 251 would be obvious to those skilled in the art, a more detailed 26 description of them will be omitted.
27 ~' In operation, ~he cy1inders 110' and ll2' are rot3ted ]~
281 ~mcans of tilc lever arms 234 and 236 and the sllaL~s 238 and 240.
29 Initiall~ the cylinderical elements 110' and 112' a~e positioned 30~ on top of the topmost workpiece 20. Tl-e cylinder 110' is '~
31 :
-25- ' '"
~ ' ", , '` , 93~L~
I then rotated counterclockwi~ to curl up the e~(1e of tlle topmost 2 workpiece 20. A clamping hook 229 is then caused to bear down 3 ayainst the edye of the next underlying workpiece. Thcreafter, the cylinder 110' is rotated in a clockwise direction to disengage its needle 120' from the edge of the workpiece 20.
6 Simultaneously, the cylindrical element 112' is ~lso rotated 7 clockwise to engage its needle 120'in the opposite edge of the 8 workpiece 20, thereby curling it up and away from the c(lge of 9 the next underlying-layer.
As shown in FIG. 16D, the cylinder 112l is then raised 11 upwardly by means of the lever arm 236 and the cylinder 112' 12 continues to rotate in the clockwise direction. .This causes the 13 workpiece 20 to be pulled up and around tlle cylindrical element 14 112' and to pass over a projecting horizontal support a2 positioned immediatel~ underneath the overhead vacuum type 16 conveyor transfer belt 230. The workpiece 20 is gripped hy the :
17 vacuum of the belt 230 and is thereafter carried away as the 18 cylindrical element 112' is returned to its original position 19 by means of the lever ar.m 236, all as shown in FIGS. 16F. and 16F.
Thls process may then be repeated or, alternatively, the 2l sequence of.operations may be reversed. Thus, for example, the ; 22 cylinder 112' would be rotated in tlle clockwise direction to 23 curl up the edge of the next underlying workpiece and the clamp 24 ¦ 228 would then be brought to bear against the top of the stack 10. :~
¦ The cylinder 110' would then be rotated in a counterclock- . ; .. ~. .
26 ¦ wise direction and simultaneously raised to pull the next 27 underlying workpiece up and over-a hori~ontal support 244 .;
28 ¦ corresponding to the support 242. At this time, the belt 230 . 29 would be driven in the opposite direction from that shown in the 30 I . .
31 . :
32 :.
. . '': ', . -26-.` , .
3~
1 figures to convey the separ~-ed workpiece to a secon~ location.
2 This allows the topmost workpieces to be not only ~ ferentiated, 3 and inverted from face to face, but also to be inverted from end 4 ¦to elld and rernoved alternately to two separate locations.
5 ¦ In this embodiment, the belt 230 is cyclically driv~n in 6 ¦ synchronism with the above described operation.
7 ¦ ~ variation of this same embodiment is depicted in FIGS. 17~¦
8 ¦ - 17D where separation is aided by means of a separating har 246 9 ¦ which passes underneath the separated workpiece 20 once tl-e edge lO ¦ is curled up by the rotating cylindrical element 112' or 110'.
11 ¦ The mechanism by which the bar 246 is propelled across the 12 ¦ top of the stack is optional and may bej fo~ example, a pneumatic 13 actuator pulling the bar. The framework in which the bar 246 l4 ¦ is supported can be similar to that depicted in FIG. 13G.
lS ¦ The terms and expressions which have been employed here are 16 ¦ used as terms of description and not of limitations, and there is 17 ¦ no intention, in the use of such terms and expressions,- of 18¦ excluding equivalents of the features shown and described, or ~91 portions thereof, it being recognized that various modifications are p sslble within the scope of the invention claimed 29 1~ ~
32 ~ ~;
-~:, . . ' .
~ .
. ' ' , . ,','.''': ' ~:~` .-24-. .:.
. ' ' , , ' 3~$
1 illustrated, it should ~e apparent th~t other suitahle ty~es of '2 transfer belts may be utilized such as belts h~viny c~m operated 3 grippers thereon.
4 Onç feature o$ this embodiment which is not disclosed in the embodiments described heretofore, is that ~llile the workpiece 6 20 is separated from the stack 10 it is also inverted. The ~ delivery of the separated and inverted workplece to one of t~o 8 locations by the belt 230 i~ under separate control. The vacu~m .-9 ¦ on the belt'over the first and second locations is alternately 10 ¦ and sequentially closed off to cause the pieces to be dropped in 11 succession at the first location and then the second location.
12 Still another embodiment which both'separates the topmost 13 ¦ workpiece and inverts it, is illustrated in FIG~S. 16~- 16F. In 14¦ this embodiment, the rotatable cylindrical elements 110' and 112' are mounted on separate swing arms 234 and 236, respectively.
16 The swing arms, in turn, `are each attached at one end to separate 17 horizontal rotatable shafts 238 and 240. The mechanism for 18 rotating the rotatable cylinders 110' and 112' can be ~hose 191 shown in the previously described embodiment de~icted in ~I~7S. 8 -10. Alternatively, the cylinders may be rotated ~y separate 21 servo motors. The shafts 238 and 240 can he rotated by means of ¦ ' 22¦ pneumatic actuato~rs operating through cranks or they may be 231 operated by still further servo motors or pneumatic actuators.
¦ Since the mechanism for accomplishing these various movements ' 251 would be obvious to those skilled in the art, a more detailed 26 description of them will be omitted.
27 ~' In operation, ~he cy1inders 110' and ll2' are rot3ted ]~
281 ~mcans of tilc lever arms 234 and 236 and the sllaL~s 238 and 240.
29 Initiall~ the cylinderical elements 110' and 112' a~e positioned 30~ on top of the topmost workpiece 20. Tl-e cylinder 110' is '~
31 :
-25- ' '"
~ ' ", , '` , 93~L~
I then rotated counterclockwi~ to curl up the e~(1e of tlle topmost 2 workpiece 20. A clamping hook 229 is then caused to bear down 3 ayainst the edye of the next underlying workpiece. Thcreafter, the cylinder 110' is rotated in a clockwise direction to disengage its needle 120' from the edge of the workpiece 20.
6 Simultaneously, the cylindrical element 112' is ~lso rotated 7 clockwise to engage its needle 120'in the opposite edge of the 8 workpiece 20, thereby curling it up and away from the c(lge of 9 the next underlying-layer.
As shown in FIG. 16D, the cylinder 112l is then raised 11 upwardly by means of the lever arm 236 and the cylinder 112' 12 continues to rotate in the clockwise direction. .This causes the 13 workpiece 20 to be pulled up and around tlle cylindrical element 14 112' and to pass over a projecting horizontal support a2 positioned immediatel~ underneath the overhead vacuum type 16 conveyor transfer belt 230. The workpiece 20 is gripped hy the :
17 vacuum of the belt 230 and is thereafter carried away as the 18 cylindrical element 112' is returned to its original position 19 by means of the lever ar.m 236, all as shown in FIGS. 16F. and 16F.
Thls process may then be repeated or, alternatively, the 2l sequence of.operations may be reversed. Thus, for example, the ; 22 cylinder 112' would be rotated in tlle clockwise direction to 23 curl up the edge of the next underlying workpiece and the clamp 24 ¦ 228 would then be brought to bear against the top of the stack 10. :~
¦ The cylinder 110' would then be rotated in a counterclock- . ; .. ~. .
26 ¦ wise direction and simultaneously raised to pull the next 27 underlying workpiece up and over-a hori~ontal support 244 .;
28 ¦ corresponding to the support 242. At this time, the belt 230 . 29 would be driven in the opposite direction from that shown in the 30 I . .
31 . :
32 :.
. . '': ', . -26-.` , .
3~
1 figures to convey the separ~-ed workpiece to a secon~ location.
2 This allows the topmost workpieces to be not only ~ ferentiated, 3 and inverted from face to face, but also to be inverted from end 4 ¦to elld and rernoved alternately to two separate locations.
5 ¦ In this embodiment, the belt 230 is cyclically driv~n in 6 ¦ synchronism with the above described operation.
7 ¦ ~ variation of this same embodiment is depicted in FIGS. 17~¦
8 ¦ - 17D where separation is aided by means of a separating har 246 9 ¦ which passes underneath the separated workpiece 20 once tl-e edge lO ¦ is curled up by the rotating cylindrical element 112' or 110'.
11 ¦ The mechanism by which the bar 246 is propelled across the 12 ¦ top of the stack is optional and may bej fo~ example, a pneumatic 13 actuator pulling the bar. The framework in which the bar 246 l4 ¦ is supported can be similar to that depicted in FIG. 13G.
lS ¦ The terms and expressions which have been employed here are 16 ¦ used as terms of description and not of limitations, and there is 17 ¦ no intention, in the use of such terms and expressions,- of 18¦ excluding equivalents of the features shown and described, or ~91 portions thereof, it being recognized that various modifications are p sslble within the scope of the invention claimed 29 1~ ~
32 ~ ~;
-~:, . . ' .
~ .
Claims (4)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. Apparatus for sequentially separating alternate layers of sheet-like workpieces from a single feed stack, the apparatus comprising means for separating each top work-piece layer from the feed stack and means for transporting the separated top workpieces alternately to a first location and to a second location, the separating means including at least one differentiating head having a pair of rotatable elements, means for mounting the rotatable elements so that their axes of rotation are parallel and opposite to each other, needles mounted in the rotatable elements so as to project exteriorly of the elements and in a direction away from the opposite rotatable element, means for selectively rotating at least one of the rotatable elements with respect to the other to engage and disengage the projecting needles of the rotated element with the top workpiece of the feed stack, depending on the direction of rotation, and for moving at least one rotatable element with respect to the other to decrease the spacing between the axes of rotation of the rotatable elements upon rotation of the rotatable element in a direction which engages its projecting needles in the topmost workpiece, whereby at least one edge of the topmost workpiece is curled upwardly and, upon movement of said rotated element toward the other element, the topmost workpiece is pulled away from the corresponding edge of the next underlying workpiece by the force of the engaged rotatable element needles to thereby separate the topmost workpiece from the stack.
2. Apparatus as recited in Claim 1 wherein the rotatable element moving means simultaneously move both rotatable elements toward each other.
3. Apparatus as recited in Claim 1 further characterized by:
at least one separating bar which is movable between rotatable elements while simultaneously pressing against the topmost workpiece after the workpiece is engaged with the needles of the moving rotatable element to produce, in the topmost workpiece, a bend which is moved across the topmost workpiece during its separation from the stack.
at least one separating bar which is movable between rotatable elements while simultaneously pressing against the topmost workpiece after the workpiece is engaged with the needles of the moving rotatable element to produce, in the topmost workpiece, a bend which is moved across the topmost workpiece during its separation from the stack.
4. Apparatus as recited in Claim 1 wherein the rotatable element moving means simultaneously counter-rotate both rotatable elements with respect to each other as they are moved toward each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA326,480A CA1079315A (en) | 1976-07-01 | 1979-04-27 | Facing ply separator |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US70185776A | 1976-07-01 | 1976-07-01 | |
| CA280,818A CA1069949A (en) | 1976-07-01 | 1977-06-17 | Facing ply separator |
| CA326,480A CA1079315A (en) | 1976-07-01 | 1979-04-27 | Facing ply separator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1079315A true CA1079315A (en) | 1980-06-10 |
Family
ID=27165137
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA326,480A Expired CA1079315A (en) | 1976-07-01 | 1979-04-27 | Facing ply separator |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1079315A (en) |
-
1979
- 1979-04-27 CA CA326,480A patent/CA1079315A/en not_active Expired
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| Date | Code | Title | Description |
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| MKEX | Expiry |