US1771019A - Sole-pressing machine - Google Patents

Description

y 1930. w. c. STEWART I 1,771,019

SOLE PRESS ING MACHINE Filed Aug. 3, 1927 5 Sheets-Sheet 1 July 22, 1930.

W. C. STEWART SOLE PRESSING MACHINE Filed 1927 5 Sheets-Sheet 2 July 22, 1930. w, c, STEW RT 1,771,019

SOLE PRESSING MACHINE Filed Au 5, 1927 5 Sheets-Sheet 3 July22,1930. w. c. STEWART ,7

SOLE PRESSING MACHINE Filed Aug 3.. 1927 5 Sheets-Sheet 4 Flgf.

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Patented July 22, 1930 UNITED STATES EQATENT QFFlQi-e;

WILLIAM C. lEi'JlETKTABT.v OF S'WA'MPSCUTT, MASSACHUSETTS, ASSIGNOIR TO UNITED SHOE MACHINERY GORFORATION, OF YATERSON, NEW JERSEY, l CORPORATION OF NEW JERSEY SOLE-PRESSING IJIAGHINE Application filed August 3,

soles having sharp bends or angles in their surface contours, to apply thedesired pressure progressively by provision for one or more intervals of release or diminution of pressure. This enables the sole to adjust itself to its new form most advantageously, without risk of overstraining the sole material by a too rapid or extreme change in its shape.

It is one object of the present invention to provide an improved machine for shaping soles in the above-mentioned manner. In the machine described herein, I have provided operating means including a clutch which automatically changes the direction of the "11' drive repeatedly during a cycle of the machine thus providing a positive alternating forward and backward drive with consequent variations in pressure. The construction illustrated comprises a controlling member which sets the clutch for forward drive when in either of two extreme positions and which operates the clutch to reverse the drive in passing from one extreme position to the other. In the machine described the r versal is eifected through a latch which is operated by the controlling member as it moves from one extreme position to the other and is automatically disconnected when a; retrograde movement of the machine ofpre- L; determmed extent has been accomphsheu;

I have also, in accordance with another feature of the invention, provided an nnproved structure for relatively moving the pressing members or forms toward and from g each other.

work-receiving position and in a position 19%". Serial llO. $310,341.

under the other form. Thus the movable form is always maintained in a parallel relation to its cooperating form, and insurance is afforded that m will be operated upon with uniform pressure.

These and other features of the invention comprising certain novel combinations and arrangements of parts will be apparent from the following description of a preferred embodiment of the invention shown in the drawings, in which Fig. 1 is a side elevation;

Fig. 2 is a frontelevation with parts broken away;

Figs. 3 and a are enlarged side elevational details ofthe link and crank mechanism;

Fig. 5 is a diagram illustrating the vari able pressure mechanism;

Fig. 6 is a detail of the driving mechanism; p

Figs. 7, 8 and 9 illustrate different positions of a part of the variable pressure mechanism; and

Fig. 10 is a detail of the driving mechanism. The illustrated machine comprises a base 10 on which two pairs of heavy side rods 12 are mounted. The side rods carry a cross yoke 14 from which are suspended vertically adjustable sole pressing or so-called upper forms 16, the machine shown being a twin machine. The suspension is preferably resilient against pressure from the lower forms or lasts 18 which are mounted on tables 20. The structure so far described is well known.

Each table 20 is pivotally mounted on two parallel links 22 of equal lengths the lower ends ofwhich are pivoted on two parallel cranks 24 also of equal lengths on crank shafts 26. The cranks 24L appertaining to the same pair of links 22extend in the same direction, opposite to that of the cranks appertaining to the other pair of links 22. Asthe crank shafts are rotatech there fore, one table 20 will rise and the other will fall so that as a shoe on one lower form is put under pressure a shoe on the other is released.

Mounted in the rear part of the machine is uinerent portions of the sole a shaft 28 having a crank arm 30 on one end and a crank arm 32 mounted near its middle. The arm 32 is connected to the right-hand rear link 22 (Fig. 2) by a link 31 (see Fig. 1). The rear crank shaft 26 has mounted at its left end (Fig. 2) a disk 36 having oppositely extending path cams and on its sides. The cam 10 engages a cam roll on the end of the arm 30, and thus as the crank shafts rotate will swing the links of the righthand table forward toward the operator and backward under the upper form 16 alternately; while at the same time the cranks 26 alternately lower and raise the lower ends of the links 22.

The cam 38 engages the end of an arm 1 mounted on a sleeve surrounding the shaft 2 and having an arm 11 linked to the rear of the left-hand links 22 (Figs. 2 and The operation of the left-hand mechanism is similar but alternate to that of the right. Each table 20 has a pin 16 which is arranged to enter a guide 48 in a yoke 50 mounted on the side bars 12, as the table 2\ rises under the upper form 16. Thus the forms 16 and 18 are alined properly as they come together, and the double link and crank structure 22, 24: insures that the forms shall have the proper orientation as the table 20 is always maintained parallel to a fixed plane as it moves.

The novel mechanism for driving the machine will now be described. A motor 52 (Fig. 6) at the rear of the machine drives continuously a fly wheel or clutch member 54 having an internal conical clutch face 56 and a conical boss 58. A shaft 60 bar .ig thereon a terminal clutch member or cone 62 and a conical collar 61 like but oppositely facing the boss 58, is mounted in the machine :rame. The shaft 60 has a gear member or pinion 66 mounted on it and can slide en dwise in its earings when pushed by a yoke 68 engaging a collar 70 on the shaft and forming one arm of a bell crang 71 pivoted at 72. The other arm of the bell crank is pivoted at 7 1 to a link 76 engaging one end of a bell crank 7 8 pivoted at 80 on the machine frame. The other end of the bell crank 78 is pivoted at 82 to a link 84: the lower end of which is pivoted to an arm 86 on a controlling member or treadle shaft 88 having a treadle 90 its front end, normally held up by a treadle spring 91. Depression of the treadle pulls down the link 81 and turns the bell era 73 and the bell crank 71 counter-clockwise, rorcing the cone 62 against the face 56 and clutching the shaft 60 to themotor 52.

The pinion 66 drives a ge: r 92 on a shaft 94 mounted in the frame of the machine and having a small pinion 96 (Fl 1) and brake drum 98 1). The brake drum 98 is em braced by brake bands 100, 102 pivoted at 16-1 on the machine frame and drawn together by a bell crank 106 pivoted at 108 on the band 102 and pulling on a link 110 pivoted to the band 100. The brake is tightened by a rod 112 which is pulled by a spring 11-1 acting on a lever 116 to which the rod 112 is connected. The lever 116 is controlled by a cam 118 on a toothed disk 120 1110111 ed on a shaft 122 and driven by the pinion 16. The cam 118 is generally circular and holds the brake released except for the two opposite depressions which allow the spring 11/1 to set it. The disk 120 rotates 180 for each ma chine cycle and the brake sets at the end of each cycle.

The shaft 122 carries a pinion 126 (Figs. 2 and which drives two pinions 28 fast on the crank shafts 26. The pinions 126 and .128 have the same number of teeth, so that the angular movement of the crank shafts 26 is equal to that of the disk 120 at all times.

The means for applying interi lent pressure to the shoe and for stopping the machine at the end of a cycle will nou be described. The treadle shaft 33 has two more arms 130, 132 (Fig. 1) extending parallel to the arm 86. The arm 130 is linked to the has lar except for alternating low and h1g1 1 14, 146, 118, 156 at its leading e d, and it an abrupt termination 152. 1am" such cams on the disk 120. oppos. e ranged.

The arm 132 has a notch 151inits 7), and lies directly below a lever oted at 158 on the machine frame. center of this lever hangs a pivre the lower end of which op xosi 2 the arm 132, and the middle part 1 v 160 is connected by a l nk 162 to do lower i frame iaft 163.

of the machine by means of a Jo The upper end 167 of the lever mounted at the other end of its rock sha ft 163 and has a cam roll. 1.70 which is arranged to ce-operate with twohumps172 on the disk 126. under the pull of a spring 17 1, which a keeps the lower end of the latch 160 pres .1 against the end of the arm 132 4 7).

hen the troadle is depr "d by the open ator the cl ch core 62 is iged with the face 56 of the member 54. a above described, and the machine beg ns to run. The turning of the treadle shaft also turns the bell crank 133 clock away from the cam 142 the high point 156 of which soon come along under the cam roll .40 and holds th treadle down, with the shalt 88 rotated from normal stopped position. a

T r turning of the shaft 88 has also dropped the end of the arm 132. The spring 1T4 pulls the link 162 and the latch 160 so that the lower end of the latch 160 falls into the notch 15-; (Fig. The machine ill nulls u the treadle as soon as the cam M2 i becomes inoperative. This raising of the treadle lifts the arm 182 which pushes up the latch 160 and the lever 156 (Fig. 9). i

The lever 156 (Fig. 10) extends undera rotatable and vertically sliding downwardly spring-pressed pin 1T0, which is mounted in one arm of the yoke 68. The pin 176 has a horizontal arm 1T8 on. which is rotatably mounted a cone 180 directly between the cones 58 and 6%, but normally not contacting with them. 3V hen the lever 156 rises as above scribed, it forces the cone 180 be cones 58 and er, forcing the shaft 00 the right (Fig. 6) and disconnecting the clutch cone 62 from the face 56. Thedriv-e is then effected through the three'cones 58, 180, 6st, and in the opposite direction. This causes tne machine to run backward relieving the pressure which has been. applied up to the in stant the reversal began. This rever e movement continues until one of the l passes under the cam roll 1T0. This bl. lever 164; clockwise 6) and throu link 162, pushes the latch 160 off the end arm 132.

L i The pin 176 then drops under t push of its spring and releases the cones, the treadle spring 91 simultaneously raises the treadle still farther than the position in dicated by Fig. 9. This rotates the bell cranl. 78 clockwise and the bell crank 71 counterclockwise and engages the clutch cone again with the face (Rotation of the be l. crank 78 in either direction from its mean position will engage the clutch core 62 with the face 56.) The machine now drives forward until the end 1 1% of the other cam 1&2 comes under the cam roll 140 and forces the treadle down to normal position, thus disengaging the clutch cone 62 from the face 56.

Fig. 5 shows diagrammatically the cam cycles, the disk 120 being regarded as 1110-.

The end of the arm 16'? passes over one of the humps 172 during the forward movement, but the resulting movement of the latch 100 is ineffectual the arm 182 being then held down by the cam 142. As the roll 1&0 reaches the end of its retrograde movement, the hump 1'7 2 again actuates the lever 167 and this changes the direction of the drive again, whereupon themachine runs forward until the roll 1&0 strikes the rise 1 r l1 l0 of the next 1. 12, when its stops, this movement corresponding to the are 186.

Fig. 5 also illustrates the movements of the cranks 24;, corresponding to this cycle of movement. The circle 21 represents the position of a crank 2 1 at the beginning of the cvcle; the circle l" represents its rosition. when the roll 1-l0 falls oil the end 2; the circle 2 1 repre: nts its position att e end the retrograde movement, which relieves the pressure so far impressed on the sole, and the circle 24 represents its position at the end of the cycle when the full pressure is impressed on the sole. The initial and final positions of the cranks are 180 apart.

The arms 116 andrlgs have a pinand slot connection at 188. This enables clockwise movement of the arm 138 (Fig. 1) to loosen the brakeat the beginning of the cy The brake is then held loose by the cam s.- until the end of thecycle, while the pin and slot at 188 enables the-arm to fall past the end 1 KO iL'AJ as described.-

t ins described as new and desire to secure by Letters of the United States is: y

1. In a machine of the class described, a first pressing member, a second pressing member, parallel links on the upper ends of which the second pressing member is mounted, cranks connected to the lower ends of the links respectively, and means for rotating the cranks to move the second pressing member toward the first.

2. In a machine of the class described, a first pressing member, a second pressing member, parallel links on the upper ends of which the second pressing member is mounted, cranks connected to the lower ends of the links respectively, means for rotating the cranks to move the second pressing niem ber toward the first, and means for swinging the links to carry the second pressing member between work receiving and operative positions.

3. In a machine of the class described, a first pressing member, a second pressing member, equal and parallel links on the upper ends of which the. second pressing mem ber is pivoted, parallel cranks connected to the lower ends of the links respectively, and means for rotating the cranks and maintaining their parallelism to move the second pressing member toward the first.

4:. In a machine of the class described, a resiliently supported pressing member, a second pressing member, equal and parallel links on the upper ends of which the second.

pressing member is pivoted, parallel cranks my invention, what lower the lower ends of the links, and a cam and connections constructed and arranged to swing the upper ends of the links to bring the second-named pressing member under the first as the cranks raise the lower ends of the links.

5. In a machine of the class described, a resiliently supported pressing member, a second pressing member, equal and parallel links on the upper ends of which the second pressing member is pivoted, parallel cranks connected to the lower ends of the links respectively, means for rotating the cranks and maintaining their parallelism to raise and lower the lower ends of the links, a cam and connections constructed and arranged to swing the upper ends of the links to bring the second-named pressing member under the first as the cranks raise the lower ends of the links, and means for positively alining the pressing members as they come together.

6. In a sole pressing machine, two pressing members arranged to press a sole between them, mechanism for moving one of said members toward. the other, a driving member, and a clutch between the driving memher and said mechanism constructed and arranged automatically to change the direction of the drive repeatedly during a machine cycle to effect alternate application and relief of pressure on a sole.

7. In a sole pressing machine, two press in g members arranged for relative movement toward each other to press a sole between them, and means for effecting said relative movement comprising a gear member automatically controlled to advance in successive steps and to have a retrograde movementbetween two advancing steps in operating on each sole.

8. In a sole-pressing machine, co-operating pressing members relatively movable to press a sole between them, operating means comprising a rotatable gear member for effecting relative movement of said pressing members, and automatic means to cause said rotatable gear member to reverse its movement after subjecting the sole to a preliminary pressure and thereafter by movement again in a forward direction to subject the sole to a greater pressure than that first applied.

9. In a sole pressing machine, two pressing members arranged for reciprocating relative movement toward and from each other, and a driving mechanism for effecting said movement comprising a reversible clutch, a member arranged to setthe clutch for forward driving by movement to each of two extreme positions and manually movable to one of said posit-ions, means for holding the member in the last-mentioned position, automatic means for moving the member to the other extreme position, and means cooperating with the member as it moves from one position to the other to set the clutch for driving the machine backward.

10. In a sole pressing machine, a pair of sole pressing members and means for effecting relative movement of the pressing members comprising a clutch having two relatively movable members engageable directly to effect forward movement of the machine, a reversing member associated with said clutch member to cause the clutch to drive the machine in the opposite direction, a controlling member arranged to engage said clutch members directly with each other by movement to either of two positions, means for latching the reversing member to the controlling member to cause movement of the controlling member from one position toward the other to move the reversing member into operative position, and means for unlatching the reversing member from the controlling member to cause said controlling member to move farther toward its other position and thereby to set the clutch for further forward movement of the machine.

11. In a sole pressing machine, a pair of sole pressing members, and means for effecting relative movement of the pressing members comprising a clutch having two relatively movable members engageable directly to effect forward movement of the machine, a reversing member associated with said clutch members to cause the cliitch to drive the machine in the opposite direction, a controlling member arranged to engage the clutch members directly with each other by movement to either of two positions, resilient means for urging the controlling member toward one position, means for holding it in the other position after the machine is started and for releasing it at a predetermined point, a lfiLCli associated with the reversing member and arranged to be operated by the controlling member as the latter moves toward the first mentioned position after its said release, whereby the reversing member is rendered operative to reverse the drive, and means for disconnecting the latch at a predetermined point to cause the resilient means to reengage the clutch directly to drive the machine forward.

12. In a machine of the class described, a relatively stationary pressing member, a second pressing member, parallel links supporting the second pressing member, and two cranks directly connected to said links respectively for operating them to move the second pressing member toward the first.

13. In a sole-pressing machine, co-operating pressing members relatively movable to press a sole between them, driving means comprising a reversible clutch for effecting relative movem nt of said pressing members, and automatic means for controlling said clutch to cause it to reverse the direction of the drive after subjecting the sole to a preill] iii

and automatic means to cause said clutch to reverse the direction of the drive at a predetermined point in the sole-pressing 0peration and thereafter to resume the forward drive to complete the pressing of the sole.

In testimony whereof I have signed my name to this specification.

WILLIAM C. STEWART.

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