US2359729A

US2359729A - Shoe machine

Info

Publication number: US2359729A
Application number: US467701A
Authority: US
Inventors: Alfred R Morrill
Original assignee: United Shoe Machinery Corp
Current assignee: United Shoe Machinery Corp
Priority date: 1940-11-04
Filing date: 1942-12-03
Publication date: 1944-10-03
Anticipated expiration: 1961-10-03

Description

Q v M? M W/w f 77, 4.

Oct. 3, 1944. A, R MoRRlLL 2,359,729

SHOE MACHINE Original Fild Nov. 4, 1940 7 Sheets-Sheet l Oct. 3, 1944. A. R. MOIRRILL,

SHOE MACHINE iled Nov. 4,1940 '7 Sheets-Sheet 2 Origina 1944- A.-R. MORR ILL Y 2,359,729

SHOE MACHINE Original Filed Nov. 4, 1940 7 Sheets-Sheet 5 Oct. 3, 194-4. MORRILL I 2,359,729

SHOE MACHINE Original Filed Nov. 4, 1940 '7 Sheets-Sheet 4 NW 1W (I Oct. 3, 1944. R M RR 2,359,729

' SHOE MACHINE Original Filed Nov. 4, 1940 7'Sheets-Sheet 5 Oct. 3, 1944. A. MORRILL SHOE MACHINE Original Filed Nov. 4, 1940 7 Sheets-Sheet 6 Oct.- 3, 1944.

A. R. MORRILL SHOE MACHINE Original Filed Nov. 4. 1940 7 slgeets-sheet 7 Patented Oct. 3, 1944 UNITED STATES TENT OFFlCE SHOE MACHINE Original application November 4, 1940, Serial No.

364,223. Divided and this application December 3, 1942, Serial No. 467,701

8 Claims.

.The present invention relates to shoe machines, and more particularly to a machine of the general type having means for attaching the upper to the insole of a shoe supported on a last, and a lasting mechanism arranged to tension successive portions of the upper for the operation of the attaching means.

The invention is herein disclosed as embodied in an automatic machine for sewing the welt and upper to the insole of a welted shoe, and is of the general type in which the shoe is supported upon a jack, and in which the jack and the means for operating on the shoe aremoved relatively to transfer the point of operation about the shoe, and to change the relative positions adaptable for use with an automatic shoe machine of the type referred to, certain features of the invention are also capable of use in other types of automatic machines, or in machines in which the shoe is held in position by the operator. It is also to .be understood that except as defined in the claims, the several features of the invention are not limited to any particular construction and arrangement of parts.

The present application is a, division of appli cation Serial No. 364,223, filed November 4, 1940, to which reference may be had for constructions indicated in the drawings, or 'herein referred to without being specifically described.

It is a principal object of the invention to provide in a machine for attaching the upper to the insole of a shoe supported on a last, a novel and improved lasting gripper which is simple and compact and is well adapted to cooperate in a most efficient manner with the several cooperating instrumentalities of the machine to position successive portions of the upper for the operashoe to the operating devices and to transfer the point of operation about the shoe.

In accordance with the present invention, applicant provides a side lasting gripper mechanism which comprises a pair of grippers pivoted together, and vertically movable in a bracket pivotally supported above and rearwardly of the sewing point for movement into and out of operative position. The outer gripper member is rigidly formed on the lower end of a slide carried in guideways in the bracket. A pair of slots arranged at an angle to one another in the slide extension of the outer gripper and in an upward extension of the inner gripper are arranged to receive an actuating pin which is reciprocated 'verticallyto actuate the grippers. A friction device acting on the slide extension of the outer gripper member causes the grippers to be opened as they are moved downwardly during the movement of the actuating pin, and to be closed as 'they are then moved-upwardly to draw in the engaged portion of the upper during the upward movement of the actuating pin. The driving connections for the actuating pin include a short link connected to an actuating lever which is pivoted .co-axially with the supporting bracket, and at its rear end is arranged to be engaged by a driving roller carried on a constantly oscillating cam lever. A spring acting on the actuating lever tends to force the gripper assembly downwardly, and to maintain an engaging contact of the actuatin lever with its driving roller.

In order that the gripper actuating connections may be rendered inoperative, applicant provides connections from a cam on the pattern cam shaft of the machine for rocking the pivot shaft on which the gripper actuating lever and the gripper supporting bracket are carried, between operative and inoperative positions. A rocking movement of the shaft to inoperative position causes the shouldered portion of the shaft to engage a pair of lugs on the 'hub of the gripper actuating lever to move the same positively upwardly against the pressure of its spring and out of engagement with its driving roller. This movement of .the gripper actuating lever is effective through a pin and slot connection with the bracket to swing the [bracket and. gripper mechanism mounted thereon away from the'work. Rocking movement of the pivot shaft to itsoperating position causes a lug on the shaft toengage an abutment on the hub of the bracket to move the same positively downwardly to its operating position against an abutment on the ma.-

chine frame.

The several features of the invention consist also in the devices, combinations and arrangements of parts hereinafter described and claimed, which together with the advantages to be obtained thereby will be readily understood by one skilled in the art from the following description taken in connection with the accompanying drawings, in which Fig. 1 is a View in right side elevation of an automatic welt shoe sewing machine illustrating in a preferred form thesubstantially the part shown in Fig, 2, but with a portion of the casing broken away and the lasting gripper removed to illustrate the underlying parts including particularly the supporting and actuating devices for the lasting gripper; Fig. 4 is a detail view in front elevation, partly in section, showing particularly the stitch forming and work gripping devices and the lasting gripper in relation thereto; Fig. 5 is a detail sectional view in front elevation taken on the line 55 of Fig. 8; Fig. 6 is a detail sectional view taken on the line B6 of Fig. 5; Fig. 7 is a detail view in right side elevation, partly in section, of the lasting gripper mechanism in which the grippers are at the limit of their upward movement during active operation, having been opened, and are starting down; Fig. 8 is a view similar to Fig. 7, but with the grippers at the limit of their downward movement, with the jaws still open; Fig. 9 is a fragmentary detail view in right side elevation illustrating particularly the gripper supporting bracket and supporting shaft, with the gripper mechanism in operating position; Fig. 10 is a view of the ripper mechanism with the grippers in their extreme down position with the grippersclosed and about to start their upward movement; Fig. 11 is a View of the gripper mechanism with the grippers at the limit of their upward movement with the grippers still in gripping position; Fig. 12 shows the stop position of the gripper mechanism in which the supporting bracket for the grippers has been shifted upwardlyto stop position; Fig. 13 shows the gripper in starting position; andFig. 14 is a fragmentary sectional plan view taken on the line Ill-I4 of Fig. 1.

, The machine illustrated in the drawings as embodying in a preferred form the several features of the present invention is-an automatic machine for sewing the welt and upper to the insole of a welted shoe, and is comparable with the disclosures of the prior patents to Morrill Nos. 2,162,026 and 2,155,438, in that certain of the instrumentalities illustrated perform equivalent functions, such instrumentalities including a sewing head capable of sewing the inseam of a welted shoe, a shoe supporting jack, pattern control mechanism for imparting turning, tipping and feeding movements to the jack and shoe supported thereon to transfer the point of operation about the margin of the shoe sole, together with mechanism operative in jacking the shoe to adjust the pattern mechanism in accordance with the size of the shoebeing operated upon, and driving and stopping mechanism arranged to operate automatically at the completion of the sewing operation to release and to move the jacked shoe away from the sewing mechanism,

, margin of the jacked shoe.

and to return the several operating mechanisms including the jack and the pattern devices associated therewith to a convenient starting position preparatory for the removal of the completed shoe and the jacking of a new shoe in the machine.

The casing or frame of the illustrated machine is built up of several sections including a floor section 20 housing principally the oil sump and various foot treadle controls, a middle section 22 housing principally the jack supporting mech- 'anism and the pattern mechanism of the machine, a head section 24 housing therein the welt sewing mechanism and the driving and stopping mechanisms of the machine, and a top section 26 supporting thereon the driving motor 28, reduction driving gears therefrom, and a distributing reservoir forming part of the oiling system for the machine.

In applicants improved machine, the drive is taken from the motor 28 directly downwardly through the head section 24 to the stop motion and to the sewing cam shaft housed therein, and thence downwardly into the middle section 22 housing the pattern mechanism of th machine. As indicated in dotted lines in Fig. 1, the armature 30 of the motor is connected through

reduction gears

32, 34 to drive a vertically arranged main drive shaft 36 which is in turn connected by means of

gears

38, 40 to drive an externally coned clutch member 42 forming the driving element of the main driving clutch for the machine.

The member 42 is loosely supported to turn on a vertical drive shaft 44, and is arranged to be engaged by a driven clutch member 46 keyed to and axially shiftable upon the shaft 44. The drive for the sewing cam shaft 50 of the machine is taken from the driven clutch member 46 through a gear formed on the external periphery of the member 46 which meshes with a gear 48 on the sewing cam shaft 50. The drive for the pattern cam shaft of the machine designated at l34'is taken from the driven clutch member 46 through the shaft 44 and operating connections which are indicated very generally in dotted lines in Fig. 1. Further description of the driving connections of the machine is omitted, since this mechanism specifically forms no part of the present invention.

A shoe sewing jack 54 is provided which may be of well known construction as that, for example, illustratedin the patent to Cross No. 2,056,714, dated October 6, 1936. The jack is carried on a spindle 56 supported at its lower end in a gimbal'bearing 58 formed on the forward end of a horizontally disposed arm support 60 forming part of a system of supporting levers on which the jack is arranged for feeding, turning and tipping movements to present the shoe properly 'to the stitch forming devices and to transfer the point of operation about the sole The several operating movements of the jack including the usual feeding, turning and pitch and roll tipping movements are controlled by means of cam levers and cams on the pattern cam shaft I 34. However, since these mechanisms form specifically no part of the present invention, further description thereof is believed not necessary.

The shoe operating devices of the illustrated machine comprises a chainstitch inseam sewing mechanism adapted for'sewing the upper and welt to the insole of a welt shoe while supported on a last. This mechanism, mounted in the sewing head to be driven from the sewing cam shaft 50, comprises a curved hook needle 64, a looper 66, a thread finger 68, a take-up (not specifically illustrated), a welt guide I0, and a. channel guide I2. The specific form of the sewing mechanism shown is illustrated in greater detail in applicants copending application Serial No. 364,223, of which the present application is a division. A full disclosure of an inseam sewing mechanism of this general type in the prior art is found in applicants prior Patent No. 2,155,438, dated April 25, 1939.

In accordance with the present invention, applicant provides a novel and improved side lasting mechanism which is arranged to engage with and position successive portions of the upper for the operation of the sewing mechanism, thus combining the side lasting operation with the sewing operation, and rendering the separate lasting operation on the shoe unnecessary. The lasting gripper mechanism, as best shown in Figs. 2, 3, and to 13 inclusive, comprises a smoothfaced gripper member '18 which is arranged to extend'downwardly between the upper and the insole supported on the last, and a cooperating rough surfaced gripper member 88 which is arranged to bite against the outer surface of the upper. The gripper member I8 is formed on the lower end of a slide member 82 carried in guideways 84 in a T-shaped supporting bracket 86. The slide member 82 is provided at its upper end with a rod extension I9 which passes through a journal formed in the upper end of the bracket 86, and has check nuts SI threaded thereon for limiting the downward movement of the slide member 82 and gripper member I8 in the bracket 86. A friction shoe 92 is held in frictional engagement with the rod I9 by means of an adjustably supported compression spring 94, and provides a frictional resistance to the upward or downward movement of the gripper member 18. The gripper member 80 is pivotally connected to the gripper 18 by a pivot pin 96 carried on the lower end of the slide member 82, and is provided with an upward extension 98 having formed therein a slot I00 which extends diagonally in a diverse angle with relation to a similar but vertically arranged slot I02 in the slide member 82. With this construction and arrangement of the gripper mechanism, a single actuating mechanism only is required for raising and lowering, and for opening and closing the grippers. This operating connection comprises a pin I04 which extends through the slots I00, I02, and is supported on the lower end of a link I06 pivotally connected with the forward end of a gripper actuating lever I83. The gripper lever I08 is pivotally supported to turn on a transversely extending rock shaft H0 which also provides support for the T-shaped bracket 86. A rearward extension of the gripper actuating lever I08 is provided with a bearing surface I I2 for engagement with a roller I I4 carried on the forwardly extending arm of the continuously oscillated lasting gripper cam lever I [5. A tension spring II6 connected between a downward extension of the gripper actuating lever I08 and an adjustable support on the frame tends to maintain the surface W2 in engagement with its actuating roller II4, the parts being so arranged as to provide a yielding downward and positive up-draw movement of the gripper mechanism. With this construction and arrangement of the arts, it will readily be seen that downward movement of the actuating lever I08 will act first to open the grippers i(see Fig.8) and thereafter to move the gripper assembly includingthe slide member 82 downwardly against the friction. provided by the friction shoe92 tothe position shown in Fig. 8. Subsequent up-draw movement of the lever I08 will first act to closethegrippers as .the pin I04 rides upwardly in the slots I00, I02, ,as shown in Fig. 10, and will thereafter raise the grippers which are held in gripping position under a pressure determined by the friction exerted by the friction shoe 92, the limit of the up-draw position being shown in Fig. '11.

Applicants improved construction embodies therein means for moving the gripper assembly into and out of active operation. To this end there is mounted on the left hand end of the rock shaft IIO, a lever arm II8 (see Fig. 3) which is connected by a link I20 with one arm of a bellcrank lever I22 supported to turn on a fixed pivot I24 (see Figs. 1 and 14) A downwardly extending arm of the bell-crank I22 is connected by a link I26 with a pattern cam lever I28 supported on the pivot shaft I29 and having a cam roller I arranged for engagement with a cooperating pattern cam I32 on the pattern cam shaft I34.

This cam corresponds with the usual Baltimore cam of these machines. For the operatingposition of the gripper, the rock shaft H0 and lever I I8 will have been rocked upwardly in a counterclockwise direction to the position shown, for example, in Figs. 7, 8 and 9. In this position of the parts, a lug I36 (see Figs. 3 and 9) carried on a collar I38 secured to the rock shaft .0 engages with a recessed shoulder I40 on thehub portion of the 'bracket 86, looking the bracket inits downward position in which the downward extension thereof is in engagement with a portion of the machine frame. A clockwise rocking movement of the rock shaft H0 and lever arm IIB causes a pair of recessed shoulders I42 formed in the rock shaft H0 to engage with a pair of lugs I44 on the hub portion of the gripper actuating lever I08, rocking the actuating lever I08 in a clockwise direction, upwardly against the pressure of its spring I I6 to raise the grippers away from the work. Continued upward movement of the lever arm I08 causes a pin I46 supported on the actuating lever I08 and arranged to ride in an arcuate slot I48 in the bracket 86 to engage against the upper end of the slot and topositivelymove the bracket upwardly and rearwardly about its piv otal connection with the rock shaft I I0. In this, inoperative position shown in Fig. 12, the engaging surface II2 of the actuating lever I08 will, be entirely out of engagement with the oscillating roller II4 carried on the gripper cam lever I I5. The rocking movement thus imparted to the bracket 86 serves also to move the gripper members I8, 80 upwardly and forwardly to an inoperative position in which the grippers will not interfere with the operations on the shoe including the removal of the finished shoe and jacking of a new shoe in operating position. Fig. 13 shows the machine starting position of the driven mechanism in which the lever arm I I8 and with it the rock shaft IIO has been moved a slight distance in a counterclockwise direction permitting the gripper actuating lever I08 to move downwardly under the influence of its spring II6 sufiiciently to open the grippers preparatory to the starting of their downward movement.

It will be understood that the invention is not limited to the specific embodiment shown, and that various deviations may be made therefrom, without departing from the spirit and scope of the appended claims. 7 v p,

- 'What is claimed is:

1. In a shoe sewing and lasting machine, sewing mechanism including a needle, a lasting gripper comprising a pair of pivoted jaws, a pivotally mounted bracket providing a slide support for said jaws, an actuating lever for said gripper arranged to turn on the axis with the bracket, a pin and slot connection permitting a limited relative movement of the lever and bracket, a limiting support against which the bracket is engaged during operation of the gripper, means for oscillating said lever for causing the gripper to tension successive portions of an upper over a last,

means acting when rendered operative to move said lever to a high inoperative position, and by means of the pin and slot connection to raise said bracket away from the work, and means operative in starting said gripper for positively moving the bracket against its limiting support toward the work in starting the machine.

2. In a lasting machine, the combination of fastening means, a gripper, a bracket providing a slide support for the gripper, a support against which the bracket is engaged during operation of the gripper, a rock shaft providing pivotal support for the bracket, an actuating lever for the gripper pivoted on the rock shaft, actuating means for the lever'arranged to impart a positive updraw and a yielding downward movement to the lever and gripper, means for limiting the relative angular movement of the lever and bracket, means for rocking the shaft between operative and inoperative positions, an element on the rock shaft rendered operative by movement of the same to inoperative position to positively raise the actuating lever andbracket away from the work, and by movement to operative position to release said lever, and a second element on said shaft rendered operative by movement of the shaft to operative position to positively hold the bracket against its support toward the work.

3. In a lasting machine, the combination of fastening means, a gripper comprising a pair of jaws pivoted to one another, a bracket providing a slide support for the gripper, a support on which the bracket is movable between an operative position toward the work and an inoperative position away from the work, actuating means for the gripper comprising an actuating lever arranged to impart updraw and downward movements to the gripper, and a friction device on the bracket arranged to act on said gripper to open the jaws during the downward movement thereof, and to close the jaws during the updraw movement thereof, actuating connections for the lever arranged for imparting a positive updraw and a yielding downward movement thereto, and control means for rendering the gripper operative and inoperative comprising connections shiftable in one direction to move the actuating lever and bracket to a raised inoperative position, and shiftable in another direction to release the lever and to positively hold the bracket in its operating position toward the work.

4. In a lasting machine, the combination of fastening means, a gripper comprising a pair of jaws pivoted to one another, a bracket in which the gripper is supported to slide, actuating means for the gripper comprising a pair of slots angled from one another in the gripper jaws, an actuating pin engaging in both slots, an oscillatory actuating lever connected with the pin, a friction device acting one one of said gripper jaws whereby a downward movement of the actuating lever and pin is effective to open the' jaws, and an updraw movement is effective to close the jaws, a rock shaft rotatable between operative and inoperative positions and on which the actuating lever and bracket are supported to turn, means for imparting a positive updraw movement to the actuating lever and gripper and a yielding downward movement thereto, means for rocking the shaft to inoperative position, and an element on the shaft rendered operative by movement of the rock shaft to inoperative position to engage with and to positively lift the actuating lever and bracket away from the work.

5. In a lasting machine, the combination of fastening means, a gripper comprising a pair of jaws pivoted toone another, a pivotally supported bracket in which the gripper is supported to slide, a limitingsupport against which the bracket is engaged during the operation of the gripper, actuating means for the gripper comprising a pair of slots angled from one another in the gripper jaws, an actuating pin'engaging in both slots, an oscillatory actuating lev'er connected with the pin, a friction device acting on one of said gripper jaws whereby the downward movement of the actuating lever and pin is effective to open the jaws, and an updraw movement is effective to close the jaws, a rock shaft rotatable between operative and inoperative positions and on which said actuating lever and bracket are supported to turn, means for imparting a positive updraw movement to the, actuating lever and gripper and a yielding downward movement thereto, an element on the shaft rendered operative by movement of the rock shaft to inoperative position to engage with and to positively lift the actuating lever and bracket away from the work, and an element on the shaft rendered operative by movement of the shaft to operative position to positively hold the bracket in operative position against its limiting support.

6. In a lasting machine, the combination r with fastening means, of a lasting gripper comprising a pair of pivoted jaws, a pivotally mounted bracket providing a sliding sup-port for the gripper, a support against which the bracket rests in operating position, an actuating lever for the gripper mounted to turn on the axis with the bracket, means for imparting a positive updraw movement to the actuating lever and gripper and a yielding downward movement thereto, a pin and slot connection for limiting relative angular movement of the lever and bracket, and means acting when rendered operative for moving the actuating lever and bracket therewith positively to a raised inopera tive position.

'7. In a lasting and sewing machine, the combination of sewing and lasting instrumentalities including a needle, a gripper, a bracket in which the gripper is slidably supported for successive updraw and downward movements to tension successive portions of the upper, a limiting support against which the bracket is engaged during operation of the gripper, an actuating lever for the gripper, means for imparting positive updraw and yielding downward movements to the lever, a rock shaft on which the bracket and lever are supported to turn, a connection rendered operative by rocking of said shaft for (positively moving the actuating lever and bracket therewith to a raised inoperative position, a shoe supporting jack, supporting and actuating means for the jack including a pattern mechanism arranged for presenting a shoe to the sewing and lasting instrumentalities and to transfer the point of operation along the shoe, and means controlled from said pattern mechanism including a cam and connections therefrom for controlling the angular position of the rock shaft to render said lasting instrumentalities operative and inoperative in timed relation to the movement of the jack.

8. In a shoe sewing and lasting machine, sewing mechanism including a needle, a lasting gripper comprising a pair of pivoted jaws, a pivotally mounted bracket providing a slide support for said jaws, an actuating lever for said gripper arranged to turn on the axis with the bracket, a lost motion connection permitting a limited relative movement of the lever and bracket, a limiting support against which the bracket is engaged during operation of the gripper, means for oscillating said lever for causing the gripper to tension successive portions of an upper over a last, and means acting when rendered operative to move said lever to a high inoperative position, and by means of said lost motion connection to raise said bracket away from the Work.

ALFRED R. MORRILL.