US2470866A - Roughing machine - Google Patents

Description

E. E. SABIN v2,470,866 nouenme MACHINE 3 Sheets-Sheet. l

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mes 1, E Sabin 5 his Afforne A v N S at G bm b h Filed May 22, 1947 May 24, 194-9.

May 24, 1949. E. E. SABlN 2,470,856

' ROUGHING MACHINE: Filed May 22, 1947 I v 5 sheets -sheet s Patented May 24, 1949 ROUGHING MACHINE -ErnestE- Sabin, Beverly, Mass, assignortto United .sme .Ma'chinerylflorporation, 'Flemington', -N. J

a corporation of New Jersey Application May az, 194-7 Serial "No: 749,696

3 Claims.

This invention relates-to roughingsmaohines and is herein illustrated and desoribedas em- :b'odied in a shoe sole channel roughing. imaohine of the -type-wdiselosed in United .-States.Letters Patent-No. 2,179,507; granted November. 1.4, 1939, :upon rthe applioation ol Arthur S. Johnson. .Sucha machinez-is provided with .apain oi: rotary iroughing brushes for engaging the .loase of .-.-a -channel and: the" inner surface of the channel lip simultaneously and .itis-provided alsowitha;

Worksupport for 'yieldably holding the =channe1 lip-with its inner surface againstone vof the roughing brushes. -It has -been iouncl in "certain types of=work, for example, .inshoesiwherein the sole is reduced to a-thin eol-ge at :the'shankxpon tion; :thata support for the marginiofvthee-sole zat this portion is desirable.

It is anobject .of the. present invention -to provide an improved channel. roughing-.machine .havingnvork supports. for both the channel. lip and the-marginaof' the sole. As shown herein-,an illustrative 'machine embodying thew invention is providedwith a pair-of roughing tools and-.with a pairv of work supports which are held against cliiierent parts of the'shoe-with individually yield- .ingzpressures to support. saidparts against their respective roughing tools,=.an-d it-is provided-also With-.acommon control means connectedtothese work supports for: enabling the operator-to son'- trol the applicationand releaseofi pressure. lln

aaocordance with a feature of the invention-the commoncontrol means. includes a treadle and a lost motion connectionso arranged-astoenahle only one otthe work supports =to beoperated upon a partial depression of the ltreadle. :In-acoord- 3 #Fig; 4 is -a .front elevation-showing the sole margin= work supportiin its out-of-the-way posi- '-tion.

The work engaging instrumentalities of -the illustrated:machinecomprise a pair of roughing tools in the-form of rotary-wbrushes l0 and: L2, :a' thin bladeelike gage ll'between the"brushes;=a wvorksupportdtandl.a"*work support 16. 'a-ln Fig. 2 .these members are shown in' operative -engagement w-ith a-work 'piece W consisting of -a shoehaving-a sole "S upon which is formeda .channellip L. 'Thewworksupport I4 is-shown in engagement with the marginal portion-of the sole to hold thebase of the -:channe1--against--the .-.brush it] and the work supportdfi' is shown' as holding .the chann'ellip against the brush ll. The brushes 102- and I2 aremounted-side'by side -upon-a shaft l8-which is journaled in-suitaole :bearings- -m'ounted in" a .frame designated generally by "the reference numeral -ZEI. The work support 46 is mounted indirectly, with provision for various adjustments, upon a 1ever- Z2-'whi'oh is fulcrumed. .upon a 1 stationary stud-.2 4 carried byt the .irame 2 H .with-.-p1'ovision.. for' .heightwise vadjustmentzof .thestud in the frame.

.Exoeptdor thepresence of the work support M ..the illustrated machine, as so fardescribedwis .substantiallyulike .the machine shown in United States -Letters Patent -.2,179,5.0'7, 1 above omen- ..tioned,.towhich-reference'maysbehad for a more complete disclosure. of --its construction and mode .01 operation.

.. The-connections: between the :treadle- -andvvork support .46 lOf othe machine .-illustrated herein :will now be? described. Pivotally" connected' to vztheaipperzend zof the-lever 22 :by'a' pin 26"isthe ifleft ihandeendrof' a. rodlzll which extends thoriiaontally f SU'bStaIlt'iaHy parallel to the shaft -18. fi'rhreade'd upon the righthand end oftherod iil *t'ained'un any'oesired position "of adjustment *upon the"rod*by a'lo'ck nut-"'32. .A crank smear having a clearance opening in'its flower fre'ef'end to reoeive'r'the' rod? 28 "bears againstfthe nut3ll. "The arm"'3fi.has ai'h'ub 36. freely rotatable upon ..a..-sta'tionary. studLIiB secured in 'theiramalfl. T-Extending fromthelhub 3.6 isa .crank armlllflto .the-dmeend Of-'W.hiCh issecuredothe upper and machine showing the operating.instrumentalities :50 aof aatreadlevroddlz. the-loW.er:en-d.ofiithis treadle with the work supports-in their initial "positions; Fig. 2 is a view-"similar to Fig. .1' showing the work supports in;their#working positions;

Fig. 3 is amend-elevation ofia portion-of the machine-and iro'd tbeingpivotally connected eto a tread-1e M24 rat the chaser-0t the; machine. spring 46 .nor- .mally holds :lthe \treadle. raised to ar; position [idetermined by a stop screw 48nwhichis adiustahly .i 55 i-threaded. through...a:. stationary lbracketi 50 rearried by the machine frame, the lower end of the screw 48 engaging the crank arm 40.

Inward movement of the work support 56 toward working position is eifected through a spring 52 which surrounds the rod 28 and which, at its left hand end, bears against a washer 54 on the rod 28, this washer being held against end thrust to the left by a boss formed on the rod 28 to receive the pin 26. The right hand end of the spring 52 bears against a washer 56 backed by a sleeve 58 which is freely slidable upon the rod 28. The sleeve 58 has a right hand portion 62 which is of greater external diameter than the left hand portion and which is threaded to receive a cupshaped nut 84 having a central opening in its base to fit around the reduced left hand portion. The base of the nut 64 has a convex abutment surface I56. Formed in the sleeve portion 62 and in the nut 64 are capstan holes 68 and 68 to receive a spanner Wrench by which the nut 64 can be adjusted axially on the sleeve 53. Abutting the right hand end of the sleeve portion 62 is the left hand end of a coil compression spring 70 and interposed between the right hand end of this spring and the lower end of the crank arm 84 is a washer I2. It is evident that the springs E and 52 will normally urge the rod 28 as far to the left as permitted by the engagement of the nut 30 with the crank arm 34 and that depression of the treadle 44 will yieldingly urge the rod 28 to the left to bring the work support it into its working position. The spring 52 is weaker than the spring 70 and is of suitable strength to hold the work support I6 against the channel lip L with desired pressure. In order to limit the depth to which the channel lip L can be abraded, the lever 22 is provided with a stop screw 74-, the upper end of which engages a stationart abutment I6 on the machine frame. Adjustment of the screw 74 can be made to accommodate different thicknesses of the channel lips to be operated upon.

The work support I4 for the margin of the sole is useful for operations upon womens shoes wherein the soles are reduced to thin edges at the shank portion. It consists of a disk or wheel freely rotatable upon a pin IS. The disk has a work-engaging surface in the form of a frustum of a cone, the vertex angle of which is about 120. The axis of the pin I8 is inclined at an angle of about 60 from the horizontal and the work engaging elements of the frusto-conical surface of the disk are substantially horizontal and parallel to the work-engaging elements of the cylindrical periphery of the roughing brush I0. The pin I8 is secured in a flange 80 which extends from the lower portion of a U-shaped slide 82 having a pair of co-linear bearing pins 84. These bearing pins 84 are slidably mounted in suitable guideways formed in a U-shaped bracket 86 to guide the slide 82 for heightwise movement. The slide 82 is normally held at the upper limit of its movement by a tension spring 88, the lower end of which is secured to a pin 90 extending between a pair of ears 92 which are integral with the slide 82 and which embrace the upstanding portion of the bracket 86. The upper end of the sprin 88 is secured to the lower end of a pin 94 upon the upper portion of which is threaded a knurled nut 96. The pin 94 extends downwardly through an opening in a flange 98 on the bracket 86 and the nut 96 engages the upper surface of the flange 98. Turning the nut 96 adjusts the tension of the spring 88.

The bracket 86 is secured uponthe upper and .4 left hand end of an inclined slide I00 which is slidably in a guideway formed in a block I02. A cover plate I04 retains the slide I00 in its guideway. The block I02 is secured by a clamping screw I06 to a lug I08 extending from a stationary bracket I I0. This bracket I I0 is secured by a clamping screw I I2 to a stationary bracket H4 and has a tongue-and-groove engagement therewith to provide for heightwise adjustment, The bracket I10 accordingly has formed therein a heightwise slot II 6 to accommodate the screw II2 for all positions of such adjustment. The bracket H4 is secured by a clamping screw I I8 to a stationary bracket I which, in turn, is secured to a stationary portion of the machine frame 20. The bracket II 4 has a tongue-andgroove engagement with the bracket I20 to provide for horizontal adjustment, the bracket I I4 having a horizontal slot I22 to accommodate the screw II8 for all positions of such adjustment.

The slide I00 is normally urged down and toward the right by a tension spring I24, the left hand end of which is secured to the slide and the right hand end of which is secured to the block I02. Engageable with the lower and right hand end of the slide I00 is a lever I26 pivotally mounted upon a stationary fulcrum pin I28 secured in the bracket H0. The lever I26 has an upwardly extending arm I which is pivotally connected to the right hand end of a link I32. The left hand end of the link I 32 is pivotally connected to the lower end of a lever I34 which is pivotally mounted upon a fulcrum pin I36 secured in the stationary frame 20. The lever I34,

2 under the influence of the spring I24 and gravity,

normally occupies the position shown in Fig. 1. An upward extension of the lever I34 has formed in it a pair of ears I38 which embrace the reduced portion of the sleeve 58 and which are engageable by the convex abutment surface 66 on the nut 64. It is evident that depression of the crank arm acting through the spring I0 serves to move the lever I34 in a counterclockwise direction as viewed in Figs. 1 and 2, thereby urging the work support l4 from its lower, initial position up into its upper of work-pressing position as shown in Fig. 2. A stop screw I40 threaded through the lever I26 engages a lug I4I extending from the block I02 to limit such upward movement of the work support I4. The screw I40 prevents excessive abrasion of the channel base and should be adjusted in accordance with the thickness of the sole margin. The spring 88 limits the degree of pressure which can be exerted by the work support I4.

In certain classes of work such as mens shoes having soles which are not reduced at the shank portion, no support is required for the margin of the sole S and it is, accordingly, desirable to provide for moving the work support I 4 to an outof-the-way position far removed from the roughing brushes in such cases. To this end, the block I02 and the lug I08 are provided with finished surfaces I42 to facilitate rotation of the block I 02 about the screw I06 when the latter has been turned to loosen its clamping action. The axis of the screw I06 is parallel to the axis of the pin 18 and the block I02 may be swung through an angle of as shown in Fig. 4 or, if desired, it may be swung through a greater angle and the screw I06 may be tightened to hold the work support I4 in its out-of-the-way position. The path of movement of the slide I00 is normal to the axis of the screw and, when the block N32 is in operating position, is inclined to the horizontal.

In the operation of the machine, depression of the treadle will first cause the work support 16 to be brought into work pressing position. As shown in Fig. 1, the sleeve 58 must move some distance to the left before the abutment surface 66 engages the ears 538 to move the work support M into work pressing position. The lost motion thus provided by the initial separa tion of the surface 66 from the ears its enables the treadle to be depressed far enough to operate the Work support It without operating the work support M. The desired extent to which the treadle must be depressed to operate the work support I4 is obtained by adjustment of the axial position of the nut 6-1 on the sleeve portion 52.

When the operation is to be performed upon womens shoes with reduced shanks, the block IE2 is clamped in its operative position as shown in Figs. 1, 2, and 3, and the stop screws M and Mt are adjusted in accordance with the thick-- nesses of the channel lip and the sole margin. The operator, hOIding the shoe with the heel end away from him, inserts the end portion of the lip L between the work support i5 and the brush !2 and depresses the treadle all the way to cause the work support IE to hold the lip against the brush [2 with a pressure determined by the spring 52 and also to cause the work support M to press the thin margin of the sole at the shank portion up to hold the base of the channel against the brush It! with a pressure determined by the spring 88. He then feeds the shoe away from him, holding the shoe, as shown in Fig. 2, pressed up and toward the right with the shoulder of the lip against the gage II. The bristles of the roughing brush H] are capable of yielding sufiiciently to permit the thick, inner portion of the sole margin to be pressed more deeply into the brush than is the thin, peripheral portion (see Fig. 2).

Having thus fed the shoe the length of the shank portion, the operator partially releases the treadle to permit the spring I24 to retract the work support I4 to the position which that member is seen to occupy in Fig. 1. While holding the treadle partially depressed to maintain the work support 16 in operating position, he continues feeding the shoe with the channel lip and the channel base in contact with their respective brushes. The work support M, which is not needed to support the thick margin of the sole around the forepart of the shoe, is now out of the way. As the opposite side of the shank comes into operating position, he again depresses the treadle fully.

While the movement of the work support M from work pressing position is slight, it takes place in a direction inclined to the axis of the roughing brushes, and the resinting displacement of the work support, being both axial and radial with respect to the brushes, is sufiicient to prevent its interfering with the manipulation of the shoe.

In many types of shoes it is only the inside of the shank of the sole that has a reduced margin requiring a full depression of the treadle.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. In a machine for roughing shoe parts, a pair of roughing tools for operating simultaneously upon different parts of the same shoe, a pair of work supports engageable respectively with the different parts of the shoe, a treadle, and connections through which depression of the treadle causes each work support to press that part of the shoe with which it is engageable against the tool which operates on that part, said connections having provision for lost motion whereby a partial depression of the treadle operates only one of the work supports and a further depression of the treadle operates the other work support.

2. In a machine for roughing surfaces of channels in shoe parts, a pair of rotary roughing brushes for operating simultaneously upon the lip and the base of a channel formed in the sole of a shoe, a work support engageable with the channel lip to hold the lip against one of said brushes, a work support engageable With the margin of the sole for holding the base of the channel against the other brush, a treadle, a connection from said treadle to the channel lip work support to cause that work support upon depression of the treadle to press the channel lip against one of the roughing brushes, and a lost motion connection between the first-mentioned connection and the sole margin work support constructed and arranged to cause that work support to press the base of the channel against the other roughing brush only upon a depression of the treadle greater than necessary to operate the channel lip work support, whereby the channel lip work support can be operated alone by a partial depression of the treadle and both work supports can be operated by a full depression of the treadle.

3. In a machine for roughing shoe parts, a roughing tool, a work support engageable with a shoe sole, a bracket in which the work support is mounted, said bracket being movable through a short distance to bring the work support from a position wherein the work support is out of contact with a work piece being operated upon by said roughing tool to a position wherein the work support presses the work piece against the tool, means for moving the bracket between said positions, and a mounting for said bracket constructed and arranged to enable the entire bracket and work support assembly to be moved away from the vicinity of the tool to a remote, inoperative and non-interfering position.

ERNEST E. SABIN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 2,036,289 MacKenzie Apr. '7, 1936 2,069,748 Brostrom Feb. 9, 193"! 2,328,609 Brostrom Sept. '7, 1943

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