US1740251A

US1740251A - Cutting machine

Info

Publication number: US1740251A
Authority: US
Inventors: Leo J Lambert
Original assignee: United Shoe Machinery Corp
Current assignee: United Shoe Machinery Corp
Priority date: 1925-08-27
Filing date: 1926-01-04
Publication date: 1929-12-17
Anticipated expiration: 1946-12-17

Description

Dec. 17, 1929. L. J. LAMBERT CUTTING MACHINE original Filed Aug. 27, `192s 4 sheets-sheet 0o 22 Q E?? 1I N N IVa/ven//or Lem/'Lambery fyi/bd crm/gy L. J. LAMBERT CUTTING MACHINE Original Filed Aug. 27, 1925 4 Sheets-Sheet 2 Dec. 17, 1929.

La] W Dec. 17, 1929. J. LAMBERT 1,740,251

CUTTING MACHINE Original Filed Aug. 227-3, 1925 4 Sheets-Sheet 3 /78 /76 n frauen/tar Leo JL afm/be@ Dec,- 17, 1929. 1 L. J. LAMBERT 1,740,251

CUTTING MACHINE original Filed Aug. 2v', 1925 4 sheets-'sheet 4 Orwy l Patented Dec. 17, 1929 STATES Parar LEO J. LAMBERT, OF SALELVI, MASSACHUSETTS, ASSIG-NGR, BY IYESNE UNITED SHOE MACHINERY CQRPRATION, 0F PATERSON, NEVI JERSEY, A CORPO- RATTON OF NEW JERSEY CUTTING MACHINE Original application filed August 27, 1825, Serial No. 52,849. Divided and this appication filed January rlhe present invention relates to cutting machines, and more particularly to machines for cutting the margins of shoe uppers, such as vamps, quarters, tongues and the like.

fin object of the invention is to provide an improved cutting mechanism for snipping the margin, at the will of the operator, prior to the folding operation in folding machines.

Another object is to simplify the construc tion of machines of the above-described character, reducing theii` cost of manufacture and rendering them more eiiicient in operation.

@ther and further objects will be er:- plained in the following description, and will be particularly pointed out in the appended claims, it being understood that the invention consists of the machine a preferred embodiment of which is illustrated and described herein, and that it is intended to express in the appended claims all the novelty that the invention may possess. l

ln the accompanying drawings, Fig. 1 is a view partly in side elevation and partly in longitudinal section of a machine constructed according to a preferred embodiment of the present invention; Fig. 2 is a horizontal section taken substantially upon the line 2 2 of Fig. 1, looking in the direction of the arrows; Fig. 3 is a section taken substantially upon the line 3-3 of Fig. 4, looking in the direction of the arrows; Fig. 4 is an enlarged section talren substantially upon the line 4 4 of Fig. 1, looking in the direction of the arrows; Fig. 5 is similarly an enlarged fragmentary elevation corresponding to Fig. 1; Fig. 6 is a section taken upon the line 6-6 of F ig. 5, looking in the direction of the arrows; Figs. 7 and 8 are enlarged perspective views illustrating the operation of the machine; F ig. 9 is a plan of a shoe Lipper, shown partly folded; Fig.y 10 is a perspective of a shoe upper folded according to present-day methods; Fig. 11 is a detail view of the improved knife mechanism taken partly in section, substantially upon the line 11-11 of Fig. 1, looking in the direction of the arrows; and Fig. 12 is a section taken substantially upon the line 12-12 of Fig. 11, looking in the direction of the arrows.

A shoe upper is shown partly folded in Serial No. 79,113.

Fig. 9. The margin 2 is intended to be folded upon the body 4 of the upper about a line of tions that are symmetrically disposed with espect to the line of fold 6. Two such symmetrically disposed portions are indicated at l() and 12; the next succeeding two are indicated at 14 and 16; the next succeeding two at 18 and 20; the next succeeding` two at 22 and 25; and so on throughout the margin of the upper, whether curved or straight.

The portion 10 should obviously be folded into contact with its symmetrically disposed portion 12; the portion 14 into contact with its symmerically disposed portion 16; and so on, ln practice, however, the portion 10 is overlapped into Contact with the portion 16; the portion 14 into contact with the portion 20; and so on, as is described more at length in a copending application, Serial No. 7 95,228, filed April 9, 1924. The reason why this overlapping folding occurs will be readily understood when it is reflected that, during the folding of the portion 10 toward the portion 12, the yet

unfolded portions

14, 18, 22 and so on, of the margin 2 pull upon the portion 10 to displace it towards the portion 15; during the folding of the portion 14 toward the portion 16, the yet

unfolded portions

18, 22, and so on, of the margin 2 pull upon the portion 14 to displace it towards the portion 20; and so on. When the margin 2 is finally folded, the resulting strains set up in the folded margin will cause the upper to twist, as is illustrated in Fig. 10. Objectionable creases are also produced.

According to the invention constituting the subject matter of a copending application, Serial No. 52,849, filed August 27, 1925, of which the'present application is a division, the portion 10 is fo'lded'accurately into contact with the portion 12; the portion 14 accurately into contact with the portion 16, as is illustrated in Fig. 9; and so on. No strains or creases are introduced into the upper by this method of folding, so that the finally folded upper will be absolutely flat.

To attain this result, the portion 10 of the folded margin is gripped on both sides and pulled positively away from the portion 16, in the direction of the arrow, Fig. 9, during the folding act-ion, to counterbalance the pull 'exerted by the

portions

14, 18, 22, and so on, of the yet unfolded margin 2. The portion 10 is thus folded flat into contact with the portion 12. A similar pull in the direction of the arrow, when folding the portion 14, will result in the portion 14 being folded flat into contact with the portion 16; and so on.

rilhe preferred mechanism for effecting this result comprises two

conical feed rolls

30 and 41 having oppositely disposed conical working surfaces that grip both sides of the margin 2 just after it has been folded by a folder or plow 32. rlhe upper feed roll 30 is preferably positively rotated, and the lower feed roll is preferably loosely mounted in a fixed bearing bracket 61, being frictionally driven by the upper feed roll through the shoe-upper margin 2 interposed therebetween. rllhe feeding pull thus exerted upon the folded margin by the feed rolls is transmitted to the body 4 of the upper resting upon the support or table 24, and the body 4 is thus caused to follow the pulled margin. 2 in the direction of feed. By reason of this pulling effect upon the margin 2, aided by the friction of the body 4 of the Lipper against the support 24, the successively pulled

portions

10, 14, 18, 22, and so on, are pulled forward in the direction of the arrow, Fig. 9. By adjusting the degree of pulling action, the successively pulledportions of the margin may be caused to become superposed directly over the corresponding symmetrically disposed portions of the body of the upper. A fold presser 42 presses the folded portions of the margin into contact with the corresponding symmetrically disposed portions of the body 4 of the upper. The feed rolls thus not only feed the stock, but they pull the margin as well.

As some portions of the margin 2 must be snipped prior to folding, it is necessary to have the stock stationary at times during such snipping. The feed roll 30 may therefore be actuated in a vertical plane into and out of contact with the folded margin 2, so' as to feed the stock while in contact, and so as to be ineffective while out of contact. The mechanism for effecting this pivotal adjustment will now be explained. The feed roll 30 is mounted upon an inclined shaft 28 that is connected by a universal joint, like a ball and socket 110, with a horizontally disposed driving shaft 66. The shaft 28 is rotatable in a bearing 112 that is horizontally pivoted to the frame of the machine at 114. The

j feed roll 30 may thus be actuated into effec- 112 is provided upon one arm of a bell-crank lever, the other arm 116 of which is provided with an adjustable stop, shown as a set screw 118. The set screw 118 engages the upper end 120 of an arm 124 that is also pivoted at 114. A coil spring 126 disposed between the frame of the machine at 128, Fig. 1, and the arm 116, tends to maintain the feed roll 30 in effective position. rlhe limiting action of the spring 126 is adjusted not only by the set screw 118 but also by a stop, shown as a stop nut 130, threaded upon a rod 132 that extends through an opening in the arm 116 and is threaded into the portion 128 of the frame. rlhe spring 126 is coiled about the rod 132.

'llo move the feed roll 30 into and out of effective feeding position, the arm 124 is oscillated about the pivot 114. ln one direction of oscillation, the upper end 120 engages the stop 118 and pivots the bearing 112 about the pivot 114. The return movement is effected by the spring 126. The arm 124 is linked at 134 to a rocking arm 136. The arm 136 is adapted to be rocked about a pivot 138 from the driving shaft 66. To this end, an interior cam 140 is fixed to the shaft 66 by a set screw 142. A cam roll 144 rides in the interior cam 140. The cam roll 144 is pivoted at 146 to a bifurcated arm 148 that is caused to reciprocate vertically by a guide roll 150 that it straddles. The guide roll 150 is mounted upon a lixed pin 152 extending from the frame of the machine. The arm 148 is pivoted at 160 to an adjustable link 162 the other end 163 of which is adjustably positioned in a groove 164 of the rocking arm 136. The movement of the cam roll 144 is thus communicated through the link 162 and the rocking arm 136 to the arm 124 to cause the raising of the feed roll 30. The end 163 of the link 162 may be actuated in opposite directions by a knee lever 166 and a treadle connected by a treadle rod 168. rfhe knee lever and the treadle rod are both connectedv with a lever 169 pivoted at 170 and having a bifurcated end 17 2 adapted to receive a projecting roll 17 4 of the link 162.

The length of the feed strokes obviously depends upon the period of time, during each cycle of operation of the Cam 140, that the feed roll 30 remains in contact with the material. lllhen the link 162 occupies the position illustrated in Fig. 3, the feed roll 30 will be in contact with the material during the comparatively short period when the cam roll 144 occupies the dwell 175, Fig. 4. At this time, the pivot 160 occupies the level of the line indicated at 177, Fie'. 3, and the end 163 of the link 162 will occupy the level of the line indicated at 179. During the remainder of the cycle of operation, the points 160v and 163 will lie on the

lines

181 and 183, respectively, and the feed roll will be out of contact with the material.

Then the link 162 occupies its other exiframes-1 treme position, the center of its end' 163 will be positioned at 185, and this will cause the arm 136 to assume a position such that the feed roll 30 will be out of contact with the material when the cam roll 144 occupies the dwell 175. lDurin'g the remainder of the eycle of operation, the feed roll 30 will be in contact with the material, and the material will thus be fed throughout the greater portion of the cycle.

rl"he latter, or long-stroke feed will be used on straight and nearly straight margins, and the former on sharply curved margins, where a short-stroke feed is desirable. All that the operator has to do to obtain a long-stroke feed is to actuate the treadle rod 168; and a shortstroke feed results when the knee lever 166 is actuated in the opposite direction.

rlhe fold presser 42 is timed to operate with the feed roll 30, so as to press the fold vwhen the feed roll 30 is ineffective and to be raised from the work when the feed roll contacts therewith. This result is effected through the same rocking arm l136. The fold presser 42 is carried upon 'a bell-crank arm 266 that is pivoted at 262. A bell-crank lever 263 that is linked to the arm 136vat 151 is yieldingly connected with the arm 260 by a spring 165.

The duration of operation of the fold presser during each cycle corresponds to the duration of ineffectiveness of the feed roll 30.

A folder or plowfor initially folding the margin 2 prier to the action thereon of the feed rolls is positioned 4upon its support at a fixed point in the line of feed as shown at 32. ln order to turn sharply curved portions of the margin during folding, the operating instrumentalities of the machine should be arranged as compactly as possible. As there is not sufficient room upon the support for securing the plow 32 thereto in the position indicated, it is carried by the bearing 112; and as the bearing is intermittently raised and lowered, in a direction at right angles to the direction of feed to render the feed intermittently effective and ineffective, the connection of the plow 32 to the bearing is rendered resilient at 34, so that the plow yieldingly re` mains in contact with the support irrespective of the operation of the bearing 112. Of course, the parts may be so adjusted, if desired, that raising the bearing will result in raising the plow also during the actuation of the feed means and the plow as a unit. The

spring yield of the plow provides also for the passage of stock of greater thicknesses, such as at seams and the like.

A retainer 153 is provided for holding the stock against movement during pauses in the feed. The retainer is normally springpressed upward, as shown more particularly in Fig. 6, to clamp the stock against the lower feed roll 41. An arm 176 that is fiXed to the bearing 112 engages an adjustable stop nut 178 upon the retainer arm 246 to actuate the retainer 153 downward, out of clamping engagement, when the feed roll 30 is actuated into feeding relation to the feed roll 41. The retainer 153 is thus intermittently rendered ineffective whenever the feed rolls are rendered effective.

The present invention is more particularly concerned with a nevel cutting mechanism for snipping the margin of the stock just after the foldii'ig operation. riihe snipping is performed, according to the preferred elnbodih ment of the persent invention, by a movable knifel 352, cooperating with a stationary knife 354 to cut the folded margin with a scissors-like action. The movable knife is mounted upon a bell-crank lever 356 that is pivoted at 59 to the bracket 61. The other end of the bellecrank lever 356 is pivoted at 362 to a lever 364. The lever 364 is connected, as presently to be described, with a reciprocating lever 366. A tension spring connecting the lever 366 with the frame of 'the machine normally tends to maintain the knife 352 in ineffective position. A stop 367 limits the action of the spring 365, The knife is normally ineffective. A projectingl pin 368 upon a link 370 that connects the lever 366 to the frame at 372 is adapted to be engaged by a hook 373 to render the knife effective. The hook 373 is normally maintained out of engagement with the pin 368 by a spring 374. When the hook 373 is rendered effective, the knife 352 is actuated through the lever 366 by a gear 152 to which the hook 372 is eccentrically connected at 150. The gear 152 is driven from a gear 154 upon the driving shaft 66. Y

As the

knives

352, 354 operate in a plane inclined to the direction of reciprocation of the lever 366, it is necessary that the arm 364 have a lost-motion connection with the lever 36,6. The preferred construction comprises friction rolls 376 and 37 8 pivoted to the arm 364 at 380, the latter adapted to reciprocate in a direction inclined to the direction of reciprocation of the lever 366, and the former at right angles to the said direction. The inclined direction is indicated in Fig. 11 by the inclined guide groove 382, and the rightangular direction by the transversely disposed guide upon the lever 366. rl`he groove 384 communicates with the groove 382. rlhe groove 382 is provided in a member 385 that has a pin-and-slot connection 387 with the lever 366. n

The hook 373 is caused to engage the pin 368 by a treadle rod 386. It is desirable, as will presently be explained, to disconnect the feed roll 30 from its control by the lever 169 during the operation of the knife 352. The treadle rod 386 is therefore provided` with a member 388 for actuating the lever 169 so as to cause the end 163 of the link 162 to assume a position midway between its extreme positions. In such midway position, the cam roll leo 144 will cause the end 163 of the link 162 to oscillate idly between the walls 389 and 390, F ig. 3, of the rocking arm 136, producing no effect upon the feed roll 30.

At such time the feed roll 30 is operated into and out of contact with the material in synchronism with the knife 352. The feedroll-carrying bearing 112 is connected with the knife-controlling arm 366 by a pin-andslot connection 392, Fig. 1, at the end of an upstanding portion 394 of the bearing. When the knife 352 is ineffective, therefore, the feed roll 30 is in contact with the stock and the retainer and the fold presser are out of contact therewith. The feed roll remains in control to feed the material with feed strokes of a length different from the lengths obtained when the feed rolls are effective under other conditions, as described above. Vhen the knife is cutting, the fold presser and the retainer are both effective and the feed roll is ineffective.

A gage 436, secured by a screw at 438, is provided rearward of the plow 32 for engaging the edge of the stock as it is fed into the machine. ,In order that concave portions of the stock may ride readily over the gage, as shown in Fig. 8, its rear portion is inclined to the plane of the support 24, as shown at 397.

Modifications will readily occur to persons skilled in the art, and all such are considered to fall within the spirit and scope of the invention, as defined in the appended claims.

What is claimed is:

1. A machine of the class described having, in combination, a support over which material is adapted to be fed, means for feeding the material, means for cutting the material, means for retaining the material against feeding movement when the feed means is ineffective, means controlled by the feed means for rendering the retaining means ineffective when the feed means is rendered effective, and means controlled by the cutting means for rendering the feed means effective.

2. A machine of the class described having, in combination, a support over which material is adapted to be fed, two feed rolls for feeding the material, means for cutting the material, means for intermittently rendering the feed rolls effective, means for clamping the material against one of the feed rolls when the feed rolls are ineffective, means for rendering the clamping means ineffective when the feed rolls are effective, and means controlled by the cutting means for rendering the feed rolls effective.

3. A machine of the class described having, v

in combination, a support over which material is adapted to be fed, means for feeding the material with feed strokes of fixed predetermined length, means for feeding the material with feed strokes of a second fixed predetermined length, means for cutting the material, and means for feeding the material with feed strokes of a third fixed predetermined length during the operation of the cutting means.

4. A machine of the class described having,

between the knife and the reciprocating,

means. Y Y

5. A machine of the class described having, in combination, a support over which material is adapted to be fed, means for feeding the material, a knife disposed in a plane at an angle to the line of feed for cutting the material, a reciprocating arm having a groove, a member secured to the arm having a groove disposed at an angle to the first-named groove and communicating therewith, and means connected with the knife having portions in the grooves.

6. A machine of the class described having, in combination, a knife, a reciprocating member for actuating the knife, a member reciprocating at an angle to the firstnamed member for actuating the first-named member, the second-named member having a. groove and a third member having a lost-motion connection with the second-named member and a groove communicating with the first-named groove disposed along the line of reciprocation of the first-named member, the firstnamed member having portions in the grooves.

In testimony whereof, I have hereunto subscribed my name.

LEO J. LAMBERT. y