CA1052958A - Control mechanism for edge folding machines - Google Patents
Control mechanism for edge folding machinesInfo
- Publication number
- CA1052958A CA1052958A CA264,138A CA264138A CA1052958A CA 1052958 A CA1052958 A CA 1052958A CA 264138 A CA264138 A CA 264138A CA 1052958 A CA1052958 A CA 1052958A
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- Prior art keywords
- lever
- feed
- workpiece
- setting
- machine
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Abstract
Abstract of the Disclosure An edge folding machine having edge snipping means, and means for adjustably determining maximum and minimum feed length settings for workpieces having different edge configurations, is also provided with mechanism whereby an operator can adjust the amount or spacing of margin splitting by the snipping means as considered appropriate for "inside", i.e. concave edge portions of the work.
Description
lOSZ958 This invention is concerned with improvemente in or relating to folding machines, more especially edge folding machines for progressively folding over a marginal portion of a workpiece, e.g. a shoe upper.
The phrase "an ede folding machine of the type herein defined"
where used herein is to be understood as referring to "an edKe folding machine for progressively folding over a marginal portion of a workpiece, comprising folding instrumentalities arranted at an operating locality of the machine, workpiece feeding means for feeding a workpiece step-i :~
by-step through the operating locality, control means whereby the feed t 10 length of each feed movement of the workpiece feeding means can be ;~ varied during the operation of said workpiece feeding means, a reciproca-tory elitting mechanism, operable in timed relation with the operation of the workpiece feeding meane, for slitting the marginal portion of a workpiece as it is fed to the operating locality of the machine by the workpiece feeding means, and actuating means for causing the elitting ~ .
mechaniem to operate" . ~ -~
In ueing euch a machine, conventionally when operating oa an `
"outeide" (i.e. convex) curve along the periphery of a workpiece, ~.
the feed length referred to above is ehortened, thus to facilitate pleating of the material of the folded-over portion. It will of course be appreciated ` that, where euch a curve arises, there ia excese material in the folded~
over portion in comparison with the surface of the workpiece to which the folded-over portion is to be secured. Conversely when operating on an "ineide" (i.e. concave) curve, where the amount of materlal ~ ;-in the folded-over portion ie less thian the miaterial of the surface to which it ie to be secured, the slittiin~t mechanism ie caueed to provide a series of elits in the portion to be folded over, prior to euch folding, thus to facilitate its eubsequent securing without distortion. Slitting ie ueually effected with the feed length solected at a maximum in order to avoid the provieion of a larger number of closely spaced slite (the .. . .
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lOSZ958 ~`
slitting arrangement making one alit for each feed movement of the workpiece feeding means) .
In order to accommodate the different feed length requirements, the control means of edge folding machinee of the type herein defined conventionally comprises adjustable means whereby a maximum setting and a minimum setting can be made for the feed length.
Furthermore, it has ueually been the case that the adjustable setting means is biased towards the maximum feed setting, although - it has been proposed to bias the adjustable means towards the minimum feed setting. Thus, for example, in one machine of the type herein defined, operator-controlled meane in the form of a treadle has been provided ~t to facilitate altering the setting of the feed length under the control of the operator according to the edge contour of the workpiece being operated upon, and aleo to cause the slitting arrangement to operate as required by said contour, the treadle being 80 arranged that the maximum feed length is selected whenever the slitting arrangement is caused thue to operate.
Again, by way of further example, in another machine of the type herein defined, the feed length is automaticalb controlled according to the edge contour of the workpiece being operated upon, said contour being sensed e. g . by photo-electric sensing means . In this machine the minimum feed length setting ie eelected only when an outeide curve ie sensed, the maximum setting being otherwise ueed (including any ~ -~
operation involving the operation of the elitting arrangement) .
It will thue be appreciated that if the maximum feed eetting i9 -to be ueed during the elitting arrangement, euch maximum setting hae to be determined according to what feed setting can be tolerated by the curvature of the "inside" curves. A substantial part of the periphery of a workpiece may, however, be relatively straight and thus capable of being folded over using a higher feed length setting than the maximum ,- , : , :
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lOS2958 in fact set because of the "in~ide" curves, 80 that in a working day operating time may be lost.
It is one of the various objects of the present invention to overcome this disadvantage in existing machines of the type herein defined. To this end, the invention provides, as one of its several features, an edge folding machine of the type above defined wherein the control means comprsies first adjusting or setting means whereby a maximum setting and a minimum setting can be made for the feed length of each feed movement of the workpiece feeding means, and second setting means whereby 10 a further setting can be made for said feed length, the machine aleo comprising further actuating means which operatee when the first-mentioned actuating meane (referred to on page 2, line 15) is operated, and thus r ~ when the slitting~arrangement is caused to operate, operation of said :.
1~ further actuating means being effective to ensure that the setting of -the feed length, while the slitting arrangement ie operating, ie not ~, less than said further setting therefor made by means of the second setting means. ~ ,~
It will thue be appreciated that by providing a further setting independently of the maximum setting of the feed length, an optimum 20 maximum feed length can be achieved for etraight line operating. Further-more, by providing an adjuetment facility by which the further setting ..
can be made for slitting purpoeee, an optimum "slitting" feed length can aleo be achieved.
The further setting which is thus made provides merely a "minimum elitting" feed length eetting. If the feed length setting in use during an operation is greater than such "minimum slitting" setting, then operation of the further wtuating mean~ will be of no effect.
A machine in accordance with the invention may be arranged eo that the feed length setting is biased towarde a maximum, but preferably 30 a bias is provided, e.g. by spring means, towards a minimum setting .. . .
.... . .. . ..
..
105;2958 ~5 ~
a~ herein disclosed. In this way to achieve a "minimum slitting" feed length setting when the slitting arrangement is caused to operate, where the setting would otherwise be less than said "minimum slitting" setting, ~ -the further actuating means is arranged to act against the influence of such biasing means.
The further actuating means, which preferably comprises a solenoid, is conveniently arranged to act, directly or indirectly, on a lever forming part of the control mean~, the arrangement being such that the further actuating means is not secured to said lever but rather relies on abutting 10 engagement 80 that, when the slitting arrangement is inoperative, the position of the lever, and thus the feed length setting, can be determined without the further actuating means being effected. ~-Furthermore, the "minimum slitting" ~etting can be varied,as appropriate to the workpiece to be operated upon, by varying the positional relationship between the further actuating means and the surface which is abuttingly engaged. This variation may be achieved in accordance with the invention by moving the further actuating means relative to such surface, but preferably the surface is provided by a linkage arrangement comprising a link capable of lengthwise, e.g. telescoping, adjustment, ~ ~-20 the link being pivotally connected to the lever of the control means.
~ Where such a link is provided, adjustment is conveniently facilitated '! by the link comprising two portions, one threadedly received within the other, 80 that relative rotation is effective to shorten or lengthen the overall length of the link.
The first setting means of the machine preferably compriees a further lever fixedly connected to the first-mentioned lever, the two levers being mounted for pivotal movement on a shaft of the control means, rotation of which shaft is effective to vary the feed length setting of the workpiece feeding means. For providing maximum and minimum 30 settings, the first setting means conveniently comprises adjustable stop ~.
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means for the further lever, either in the form of conventional adjustable stop screws, or a series of apertures into which selectively stop pins may be inserted so as to extend into the path of movement of the further lever, or a combination of a series of apertures into which one pin may be so inserted, e.g. for the maximum setting, with an adjustable stop screw, e.g, for the minimum setting.
In using such a machine, the operator conveniently makes the maximum and minimum feed length settings, according to the edge contour of he workpiece to be operated upon, .. ..
using the first setting means, and also makes the further setting, using the second setting means, according to the amount of slitting deemed appropriate for the "inside" curves of such workpiece, -It will be ap~reciated that the invention as set out above is applicable to both operator-controlled machines and also automatically controlled machines.
According to a broad aspect of the present invention ~ -there is provided an edge folding machine which comprises ~ 20 means for intermittently feeding the margin of a workpiece -Y~ to and through the operating zone of edge folding inQtrument-alities. A control mechanism is provided for sett1ng a maximum and a minimum feed length by which the means can - incrementally move the margin, Means is also provided for slitting the margin as it is fed, and a second mechanism is provided for making a further setting of the feed length.
An actuating means is operative during operation of the control mechanism and the slitting means, to determine the snipping feed length independently of the settings for maximum and minimum feed lengths.
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~OS2958 The above and other of the various objects and several features of the invention will become clearer from the following detailed description, to be read with reference to the accompanying drawings, of a machine embodying the inventior (hereinafter called "the illustrative machine").
It will of course be appreciated that this illustrative machine has been selected for description by way of exempli-fication of the invention and not by way of limitation thereof.
Fig. 1 is a view in side elevation of a cementing and folding machine, with frame portions broken away to show internal mechanism, and Fig, 2 is a view looking in the direction of the arrow II in Fig. 1 and showing portions of the work feed and snipper feed control means, -In the accompanying drawings is shown a fragmentary ; ~-;
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view of the illustrative machine, showing parts, including first and second adjustable setting means, of the control --means thereof together with further actuating means associated ~-with said second setting means.
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l~SZ958 The illustrative machine, which is generally similar, except as hereinafter described, to the edge folding machine described in U.S.
Letters Patent No. 2, 720,~ff7 in the name of R. E. Nangler, is a machine of the type herein-above defined and compriees folding instrumentalities (not shown), including a so-called gage block, gage finger, folding finger and creaser foot (corresponding to the elements 24, 28, 30 and - 32 respectively of the machine described in said Patent) . The folding instrumentalities are supported in a machine frame in the form of a casting, a portion 10 of which i8 shown in the drawing. As is conventional, the 10 creaser foot of the illustrative machine has a passage through which hs~t melt adhesive can be supplied, thus to feed adhesive into the area `~ of fold of the marginal portion of a workpiece prior to ite being folded over in the operation of the machine.
The illustrative machine also comprises workpiece feeding means (not shown) constituted by a hammer and anvil (corresponding to the hammer and anvil 3~, 38 of the machine described in the aforementioned Patent, which also act together to grip and press a fold after it has been formed in a workpiece margin) . It will be appreciated that the hammer and anvil are effective to feed a workpiece step-by-step through the operating locality of the illustrative machine.
In addition, the illustrative machine comprises a reciprocatory slitting arrangement constituted by a slitting knife and actuating means therefor (not shown, but corresponding respectively to the snipping knife 40 of the machine described in the aforementioned Patent and the actuating means therefor), said arrangement being operable in timed relationship with the workpiece feeding means of the illustrative machine ; and being effective, when caused to operate by operation of the actuating means, to slit the marginal portion of a workpiece as it is fed therepast to the operating locality, the arrangement being such that the knife operates once for each feed movement of the workpiece feeding mean8.
lOS'~958 The illustrative machine further comprises control means whereby the feed length of each feed movement of the workpiece feeding means can be varied, said control means comprising a so-called feed control shaft 12 (Figs. 1,2) (corresponding to the shaft 174 of the machine described - in the aforementioned Patent) which is supported for rotation in the frame portion 10. Secured to the shaft 12 is a lever 14 extending towards the front of the machine and thus mounted for pivotal movement with said shaft between a first position, determined by an adjustable stop ~ -screw 16 supported on the machine frame, and a second position, selectively ; determined by a stop pin 18 (Figs . 1, 2) inserted in a selected one of ., 10 a series of apertures 20 formed in a surface 22 of the frame portion 10, the pin 18 being arranged to extend into the path of the lever 14.
The lever 14, stop screw 16 and pin 18 together with it~ associated apertures constitutes first adjustable setting means of the control means of the illustrative machine, the first and second, adjusted, positions of the lever serving to determine respectively minimum and maximum settings for the feed length of each feed movement of the workpiece feeding means .
The lever 14 is biased towards the minimum setting by means of a spring 24 acting between a first lever 26, also secured on the shaft 12, and an eye 28 adjustably mounted in a wall of a housing 30 carried at the rear of the frame portion 10. In operation, the lever 14 is moved out of its first position, under the control of the operator, by actuation of a treadle (not shown) operatively connected to the lever by a Bowden ` ~ -cable 32. The treadle also serves to enable the operator to vary the speed at which the foldhg instrumentalities, workpiece feeding means and slitting arrangement are operated, the arrangement being such that the further the treadle is depressed, the higher the speed of operation as well as the larger the feed length setting.
B Acting on the lev 2B i~ ~econd set~ing means of the illustrative . . ',.
lOSZ958 :`
machine, by which means a further setting of the feed length is made by the operator, said means compri~ing a linkage arrangement including a link generally designated 34 capable of lengthwise telescoping adjustment.
The link 34 i9 pivotally connected at one end to the lever 28 and at its other end to a second lever 36, which is mounted for pivotal movement on a shaft 38, referred to hereinafter. The link 34 comprises a first ., rod portion 40 pivotally connected to the lever 2B, the end of said portion remote from the lever being accommodated with a second sleeve portion - 42. The sleeve portion i8 capable of sliding movement on the rod portion :: .
; to a limit determined by two collars 44,46, and a spring 48 serving ~, 10 .
to urge the sleeve in a direction away from the lever 26. An end portion, remote from the lever 26, of the sleeve portion is threadedly received in a threaded bore of a third rod portion 50 of the link 34, which i8 pivotally . , .
connected with the lever 36. The sleeve portion 42 can be rotated relative to the rod portion 50 thus to obtain relative lengthwise movement therebetween -- -and thus to vary the overall length of the composite link. To assist in effecting such rotation, a knurled head 52 is provided on the sleeve portion .
The illustrative machine also comprises further actuating means associated with the second setting means and comprising a rotary solenoid 54 mounted on a bracket 56 within the housing 30, the solenoid having an output shaft constituted by the shaft 38. Thus, upon energization -of the solenoid, the shaft 38 is caused to rotate through a fixed distance, being part of one revolution. Fixedly mounted on the shaft 38 is a carrier arm 58 supporting an abutment pin HO by means of which the lever 36 can be abuttingly engaged, a recess ff2 for accommodating the pin being provided in said lever.
The further actuating means of the illustrative machine ie operated when the first-mentioned actuating me fns is operated, and thus when the slitting arrangement is caused to operate. Operation of the further ,.
I, .B~.i-30, - .
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~052958 actuating means is effective to ensure that the setting of the feed length, - while the slitting arrangement is operating, is not le~s than the further setting therefor, which is made by means of the adjustable link of the second setting means. Thus, if, at the time of operating the first-mentioned actuating means, the feed length sefflng, as determined under the control . ., of the operator, i~ less than said further setting, as determined by the second setting means, operation of the further actuating means will be effective to cause the pin 60 abuttingly to engage the lever 3~ and ~ thus to cause, through the link 34 and lever 26, rotation of the feed control shaft 12, with consequent variation of the feed length setting to said further setting. Where, on the other hand, at the time of operating the actuating means, the feed length sefflng is greater than said further setting, operation of the further actuating means will be ineffective to alter the settint, since the "stroke" of the pin 60 will be insufficient to bring the pin into abutting engagement with the lever 36. , ~ -It will thus be appreciated that, in using the illustrative machine, desired maximum (and minimum) feed length sefflngs can be made, as are considered the optima for the workpiece to be operated upon, independently of the feed length setting desired when the slitting arrangement ao is in operation, and further the "minimum slitting" feed length sefflng can be made as is considered an optimum for the workpiece to be operated upon. - .
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The phrase "an ede folding machine of the type herein defined"
where used herein is to be understood as referring to "an edKe folding machine for progressively folding over a marginal portion of a workpiece, comprising folding instrumentalities arranted at an operating locality of the machine, workpiece feeding means for feeding a workpiece step-i :~
by-step through the operating locality, control means whereby the feed t 10 length of each feed movement of the workpiece feeding means can be ;~ varied during the operation of said workpiece feeding means, a reciproca-tory elitting mechanism, operable in timed relation with the operation of the workpiece feeding meane, for slitting the marginal portion of a workpiece as it is fed to the operating locality of the machine by the workpiece feeding means, and actuating means for causing the elitting ~ .
mechaniem to operate" . ~ -~
In ueing euch a machine, conventionally when operating oa an `
"outeide" (i.e. convex) curve along the periphery of a workpiece, ~.
the feed length referred to above is ehortened, thus to facilitate pleating of the material of the folded-over portion. It will of course be appreciated ` that, where euch a curve arises, there ia excese material in the folded~
over portion in comparison with the surface of the workpiece to which the folded-over portion is to be secured. Conversely when operating on an "ineide" (i.e. concave) curve, where the amount of materlal ~ ;-in the folded-over portion ie less thian the miaterial of the surface to which it ie to be secured, the slittiin~t mechanism ie caueed to provide a series of elits in the portion to be folded over, prior to euch folding, thus to facilitate its eubsequent securing without distortion. Slitting ie ueually effected with the feed length solected at a maximum in order to avoid the provieion of a larger number of closely spaced slite (the .. . .
",' ; . . ~
lOSZ958 ~`
slitting arrangement making one alit for each feed movement of the workpiece feeding means) .
In order to accommodate the different feed length requirements, the control means of edge folding machinee of the type herein defined conventionally comprises adjustable means whereby a maximum setting and a minimum setting can be made for the feed length.
Furthermore, it has ueually been the case that the adjustable setting means is biased towards the maximum feed setting, although - it has been proposed to bias the adjustable means towards the minimum feed setting. Thus, for example, in one machine of the type herein defined, operator-controlled meane in the form of a treadle has been provided ~t to facilitate altering the setting of the feed length under the control of the operator according to the edge contour of the workpiece being operated upon, and aleo to cause the slitting arrangement to operate as required by said contour, the treadle being 80 arranged that the maximum feed length is selected whenever the slitting arrangement is caused thue to operate.
Again, by way of further example, in another machine of the type herein defined, the feed length is automaticalb controlled according to the edge contour of the workpiece being operated upon, said contour being sensed e. g . by photo-electric sensing means . In this machine the minimum feed length setting ie eelected only when an outeide curve ie sensed, the maximum setting being otherwise ueed (including any ~ -~
operation involving the operation of the elitting arrangement) .
It will thue be appreciated that if the maximum feed eetting i9 -to be ueed during the elitting arrangement, euch maximum setting hae to be determined according to what feed setting can be tolerated by the curvature of the "inside" curves. A substantial part of the periphery of a workpiece may, however, be relatively straight and thus capable of being folded over using a higher feed length setting than the maximum ,- , : , :
:,- . - .
'. ' ' ' t :. ' ' .
lOS2958 in fact set because of the "in~ide" curves, 80 that in a working day operating time may be lost.
It is one of the various objects of the present invention to overcome this disadvantage in existing machines of the type herein defined. To this end, the invention provides, as one of its several features, an edge folding machine of the type above defined wherein the control means comprsies first adjusting or setting means whereby a maximum setting and a minimum setting can be made for the feed length of each feed movement of the workpiece feeding means, and second setting means whereby 10 a further setting can be made for said feed length, the machine aleo comprising further actuating means which operatee when the first-mentioned actuating meane (referred to on page 2, line 15) is operated, and thus r ~ when the slitting~arrangement is caused to operate, operation of said :.
1~ further actuating means being effective to ensure that the setting of -the feed length, while the slitting arrangement ie operating, ie not ~, less than said further setting therefor made by means of the second setting means. ~ ,~
It will thue be appreciated that by providing a further setting independently of the maximum setting of the feed length, an optimum 20 maximum feed length can be achieved for etraight line operating. Further-more, by providing an adjuetment facility by which the further setting ..
can be made for slitting purpoeee, an optimum "slitting" feed length can aleo be achieved.
The further setting which is thus made provides merely a "minimum elitting" feed length eetting. If the feed length setting in use during an operation is greater than such "minimum slitting" setting, then operation of the further wtuating mean~ will be of no effect.
A machine in accordance with the invention may be arranged eo that the feed length setting is biased towarde a maximum, but preferably 30 a bias is provided, e.g. by spring means, towards a minimum setting .. . .
.... . .. . ..
..
105;2958 ~5 ~
a~ herein disclosed. In this way to achieve a "minimum slitting" feed length setting when the slitting arrangement is caused to operate, where the setting would otherwise be less than said "minimum slitting" setting, ~ -the further actuating means is arranged to act against the influence of such biasing means.
The further actuating means, which preferably comprises a solenoid, is conveniently arranged to act, directly or indirectly, on a lever forming part of the control mean~, the arrangement being such that the further actuating means is not secured to said lever but rather relies on abutting 10 engagement 80 that, when the slitting arrangement is inoperative, the position of the lever, and thus the feed length setting, can be determined without the further actuating means being effected. ~-Furthermore, the "minimum slitting" ~etting can be varied,as appropriate to the workpiece to be operated upon, by varying the positional relationship between the further actuating means and the surface which is abuttingly engaged. This variation may be achieved in accordance with the invention by moving the further actuating means relative to such surface, but preferably the surface is provided by a linkage arrangement comprising a link capable of lengthwise, e.g. telescoping, adjustment, ~ ~-20 the link being pivotally connected to the lever of the control means.
~ Where such a link is provided, adjustment is conveniently facilitated '! by the link comprising two portions, one threadedly received within the other, 80 that relative rotation is effective to shorten or lengthen the overall length of the link.
The first setting means of the machine preferably compriees a further lever fixedly connected to the first-mentioned lever, the two levers being mounted for pivotal movement on a shaft of the control means, rotation of which shaft is effective to vary the feed length setting of the workpiece feeding means. For providing maximum and minimum 30 settings, the first setting means conveniently comprises adjustable stop ~.
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means for the further lever, either in the form of conventional adjustable stop screws, or a series of apertures into which selectively stop pins may be inserted so as to extend into the path of movement of the further lever, or a combination of a series of apertures into which one pin may be so inserted, e.g. for the maximum setting, with an adjustable stop screw, e.g, for the minimum setting.
In using such a machine, the operator conveniently makes the maximum and minimum feed length settings, according to the edge contour of he workpiece to be operated upon, .. ..
using the first setting means, and also makes the further setting, using the second setting means, according to the amount of slitting deemed appropriate for the "inside" curves of such workpiece, -It will be ap~reciated that the invention as set out above is applicable to both operator-controlled machines and also automatically controlled machines.
According to a broad aspect of the present invention ~ -there is provided an edge folding machine which comprises ~ 20 means for intermittently feeding the margin of a workpiece -Y~ to and through the operating zone of edge folding inQtrument-alities. A control mechanism is provided for sett1ng a maximum and a minimum feed length by which the means can - incrementally move the margin, Means is also provided for slitting the margin as it is fed, and a second mechanism is provided for making a further setting of the feed length.
An actuating means is operative during operation of the control mechanism and the slitting means, to determine the snipping feed length independently of the settings for maximum and minimum feed lengths.
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: , .. : :
~OS2958 The above and other of the various objects and several features of the invention will become clearer from the following detailed description, to be read with reference to the accompanying drawings, of a machine embodying the inventior (hereinafter called "the illustrative machine").
It will of course be appreciated that this illustrative machine has been selected for description by way of exempli-fication of the invention and not by way of limitation thereof.
Fig. 1 is a view in side elevation of a cementing and folding machine, with frame portions broken away to show internal mechanism, and Fig, 2 is a view looking in the direction of the arrow II in Fig. 1 and showing portions of the work feed and snipper feed control means, -In the accompanying drawings is shown a fragmentary ; ~-;
.
view of the illustrative machine, showing parts, including first and second adjustable setting means, of the control --means thereof together with further actuating means associated ~-with said second setting means.
.
- 6a -A
, "
l~SZ958 The illustrative machine, which is generally similar, except as hereinafter described, to the edge folding machine described in U.S.
Letters Patent No. 2, 720,~ff7 in the name of R. E. Nangler, is a machine of the type herein-above defined and compriees folding instrumentalities (not shown), including a so-called gage block, gage finger, folding finger and creaser foot (corresponding to the elements 24, 28, 30 and - 32 respectively of the machine described in said Patent) . The folding instrumentalities are supported in a machine frame in the form of a casting, a portion 10 of which i8 shown in the drawing. As is conventional, the 10 creaser foot of the illustrative machine has a passage through which hs~t melt adhesive can be supplied, thus to feed adhesive into the area `~ of fold of the marginal portion of a workpiece prior to ite being folded over in the operation of the machine.
The illustrative machine also comprises workpiece feeding means (not shown) constituted by a hammer and anvil (corresponding to the hammer and anvil 3~, 38 of the machine described in the aforementioned Patent, which also act together to grip and press a fold after it has been formed in a workpiece margin) . It will be appreciated that the hammer and anvil are effective to feed a workpiece step-by-step through the operating locality of the illustrative machine.
In addition, the illustrative machine comprises a reciprocatory slitting arrangement constituted by a slitting knife and actuating means therefor (not shown, but corresponding respectively to the snipping knife 40 of the machine described in the aforementioned Patent and the actuating means therefor), said arrangement being operable in timed relationship with the workpiece feeding means of the illustrative machine ; and being effective, when caused to operate by operation of the actuating means, to slit the marginal portion of a workpiece as it is fed therepast to the operating locality, the arrangement being such that the knife operates once for each feed movement of the workpiece feeding mean8.
lOS'~958 The illustrative machine further comprises control means whereby the feed length of each feed movement of the workpiece feeding means can be varied, said control means comprising a so-called feed control shaft 12 (Figs. 1,2) (corresponding to the shaft 174 of the machine described - in the aforementioned Patent) which is supported for rotation in the frame portion 10. Secured to the shaft 12 is a lever 14 extending towards the front of the machine and thus mounted for pivotal movement with said shaft between a first position, determined by an adjustable stop ~ -screw 16 supported on the machine frame, and a second position, selectively ; determined by a stop pin 18 (Figs . 1, 2) inserted in a selected one of ., 10 a series of apertures 20 formed in a surface 22 of the frame portion 10, the pin 18 being arranged to extend into the path of the lever 14.
The lever 14, stop screw 16 and pin 18 together with it~ associated apertures constitutes first adjustable setting means of the control means of the illustrative machine, the first and second, adjusted, positions of the lever serving to determine respectively minimum and maximum settings for the feed length of each feed movement of the workpiece feeding means .
The lever 14 is biased towards the minimum setting by means of a spring 24 acting between a first lever 26, also secured on the shaft 12, and an eye 28 adjustably mounted in a wall of a housing 30 carried at the rear of the frame portion 10. In operation, the lever 14 is moved out of its first position, under the control of the operator, by actuation of a treadle (not shown) operatively connected to the lever by a Bowden ` ~ -cable 32. The treadle also serves to enable the operator to vary the speed at which the foldhg instrumentalities, workpiece feeding means and slitting arrangement are operated, the arrangement being such that the further the treadle is depressed, the higher the speed of operation as well as the larger the feed length setting.
B Acting on the lev 2B i~ ~econd set~ing means of the illustrative . . ',.
lOSZ958 :`
machine, by which means a further setting of the feed length is made by the operator, said means compri~ing a linkage arrangement including a link generally designated 34 capable of lengthwise telescoping adjustment.
The link 34 i9 pivotally connected at one end to the lever 28 and at its other end to a second lever 36, which is mounted for pivotal movement on a shaft 38, referred to hereinafter. The link 34 comprises a first ., rod portion 40 pivotally connected to the lever 2B, the end of said portion remote from the lever being accommodated with a second sleeve portion - 42. The sleeve portion i8 capable of sliding movement on the rod portion :: .
; to a limit determined by two collars 44,46, and a spring 48 serving ~, 10 .
to urge the sleeve in a direction away from the lever 26. An end portion, remote from the lever 26, of the sleeve portion is threadedly received in a threaded bore of a third rod portion 50 of the link 34, which i8 pivotally . , .
connected with the lever 36. The sleeve portion 42 can be rotated relative to the rod portion 50 thus to obtain relative lengthwise movement therebetween -- -and thus to vary the overall length of the composite link. To assist in effecting such rotation, a knurled head 52 is provided on the sleeve portion .
The illustrative machine also comprises further actuating means associated with the second setting means and comprising a rotary solenoid 54 mounted on a bracket 56 within the housing 30, the solenoid having an output shaft constituted by the shaft 38. Thus, upon energization -of the solenoid, the shaft 38 is caused to rotate through a fixed distance, being part of one revolution. Fixedly mounted on the shaft 38 is a carrier arm 58 supporting an abutment pin HO by means of which the lever 36 can be abuttingly engaged, a recess ff2 for accommodating the pin being provided in said lever.
The further actuating means of the illustrative machine ie operated when the first-mentioned actuating me fns is operated, and thus when the slitting arrangement is caused to operate. Operation of the further ,.
I, .B~.i-30, - .
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~052958 actuating means is effective to ensure that the setting of the feed length, - while the slitting arrangement is operating, is not le~s than the further setting therefor, which is made by means of the adjustable link of the second setting means. Thus, if, at the time of operating the first-mentioned actuating means, the feed length sefflng, as determined under the control . ., of the operator, i~ less than said further setting, as determined by the second setting means, operation of the further actuating means will be effective to cause the pin 60 abuttingly to engage the lever 3~ and ~ thus to cause, through the link 34 and lever 26, rotation of the feed control shaft 12, with consequent variation of the feed length setting to said further setting. Where, on the other hand, at the time of operating the actuating means, the feed length sefflng is greater than said further setting, operation of the further actuating means will be ineffective to alter the settint, since the "stroke" of the pin 60 will be insufficient to bring the pin into abutting engagement with the lever 36. , ~ -It will thus be appreciated that, in using the illustrative machine, desired maximum (and minimum) feed length sefflngs can be made, as are considered the optima for the workpiece to be operated upon, independently of the feed length setting desired when the slitting arrangement ao is in operation, and further the "minimum slitting" feed length sefflng can be made as is considered an optimum for the workpiece to be operated upon. - .
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Claims (4)
1. An edge folding machine comprising means for intermittently feeding the margin of a workpiece to and through the operating zone of edge folding instrumentalities, control mechanism for setting a maximum and a minimum feed length by which said means can incrementally move the margin, means for slitting the margin as it is fed, a second mechanism for making a further setting of the feed length, and an actuating means operative during operation of said control mechanism and the slitting means to determine the snipping feed length independently of the settings for maximum and minimum feed lengths.
2. Edge folding machine for progressively folding over a marginal portion of a workpiece, comprising folding instrumentalities movable at an operating locality of the machine, workpiece feeding means for feeding a workpiece step-by-step through the operating locality, a feed control device by which the feed length of each feed movement of the workpiece feeding means can be varied, said device including a feed control shaft which is operatively connected with a workpiece feeding means and rotation of which is effective to cause the feed length to be varied as aforesaid, and setting means for setting maximum and minimum lengths to the rotation of said shaft, and thus to the feed length variation, the machine also comprising a reciprocatory slitting knife mechanism, operable in timed relation with the operation of the workpiece feeding means, for slitting the marginal portion of the workpiece fed by the workpiece feeding means as aforesaid, and an actuator by which the slitting knife mechanism can be brought into operation, characterized by the provision of a first lever mounted on the feed control shaft, a second lever connected to the first lever by means of a telescopic link, said second lever providing a surface engageable by an abutment carried by a fixed-stroke-actuator, whereby said fixed-stroke actuator is operable when the first-mentioned actuator is operated to bring the slitting knife mechanism into operation, and further wherein the first lever is also movable, together with the feed control shaft, independently of the fixed-stroke actuator.
3. Machine according to claim 2 characterized in that the link comprises a rod portion connected to the first lever and having a sleeve portion slidable and rotatably mounted thereon, the sleeve portion being threadedly engageable with a further, hollow, rod portion of the link.
4. Machine according to claim 2 characterized in that the fixed-stroke actuator comprises a rotary solenoid having an actuator lever fixedly mounted on its output shaft, on which also the second lever is freely mounted, the actuator lever carrying an abutment for cooperation with the surface of the second lever as aforesaid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA264,138A CA1052958A (en) | 1976-10-25 | 1976-10-25 | Control mechanism for edge folding machines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA264,138A CA1052958A (en) | 1976-10-25 | 1976-10-25 | Control mechanism for edge folding machines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1052958A true CA1052958A (en) | 1979-04-24 |
Family
ID=4107126
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA264,138A Expired CA1052958A (en) | 1976-10-25 | 1976-10-25 | Control mechanism for edge folding machines |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1052958A (en) |
-
1976
- 1976-10-25 CA CA264,138A patent/CA1052958A/en not_active Expired
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