US2442167A - Machine for cementing shoe soles - Google Patents

Description

May 25, 1948. w. GRIFFITH 2,442,167

MACHINE FOR CEMENTING SHOE SOLES Filed March 18, 1946 @j @fram kijaiented May 25, 1948 UNITED STATES PATENT OFFICE 2,442,167 MACHINE FOR CEMENTING SHOE SOLES William Griffith, South Pasadena, Calif.

Application March 18, 1946, Serial No. 655,091

Claims. 1

This invention relates to improvements in shoe machinery and concerns primarily a device for facilitating the cementing of shoe soles onto uppers.

It is now common practice to attach shoe soles to uppers by applying cement to an upper on a last and to the sole and to cause the sole to adhere to the upper by subjecting the applied sole on the last to great pressure,

p One object of the present invention is t0 pr-ovide an improved machine consisting of a walking beam that is pivotally mounted intermediate its ends and which has two boxes located beneath the walking beam on opposite sides of its pivotal mounting adapted to contain a liquid and presenting a flexible upper surface on which the last with its upper and applied sole may be positioned and which has last pressing means for pressing the last firmly against the upper surfaces of the boxes which last pressing means are guided and restricted to vertical movements and to provide means for pneumatically oscillating or rocking of the walking beam.

Still another object of the invention is to provide a machine for cementing shoe soles onto shoes wherein there is a walking beam equipped on opposite ends thereof with last pressing means for pressing the last downwardly against the pressure surface and which is so arranged that while one last is being pressed by the machine the other last pressing means is in released position to enable lasts to be removed and applied while the first last is being pressed.

With the foregoing and other objects in View, which will be made manifest in the following detailed description and specically pointed out in the appended claims, reference is had to the accompanying drawings for an illustrative embodiment of the invention, wherein:

Figure 1 is a longitudinal vertical section through a portion of the machine embodying the present invention;

Fig. 2 is a top plan View of a machine;

Fig. 3 is an end View in elevation, parts being broken away and shown in section and may be regarded as taken in the direction of the arrow 5 upon Fig. l.

Referring to the accompanying drawings wherein similar reference characters designate similar parts throughout, the improved machine comprises a suitable table generally indicated at Hi and having a standard II thereon which serves to pivotally mount a walking beam' I2. To one end of the walking beam links I4 are pivotally secured and these links serve to connect the walking beam to the piston rod I5 of a pneumatic cylinder I6 within which a piston not shown is reciprocable. Air or other iluid pressure is supplied to the ends of the cylinder through 'a c-onduit ISa from any suitable control valve such as a foot operated valve to forcibly elevate or lower the piston and to consequently rock the walking beam IZ. In the table on opposite sides of the standard I I and below the walking beam I2 there are boxes II and I8 which are adapted to contain a liquid such as water indicated at I 9. The boxes have outwardly extending anges adjacent the top thereof which rest on the table I0 and on these flanges there is positioned a rubber dia.

phragm 20 preferably covered with 1a tough but flexible matter such as elks hide indicated at 2I. The rubber diaphragm and its covering 2| are retainedV on the boxes by means -of a clamping ring 22 and-cap screws 23. Within the boxes there are wooden heel supports 24 which rest on the bottom surfaces of the boxes and have their tops only slightly spaced below the bottom of the rubber diaphragm 20. These supports carry wooden dowels 25 that extend substantially entirely across the box to maintain the supports 24 in position therein. The supports 24 are 'adapted to be positioned beneath the heel of the last. At the outer sides of the boxesv there may be stops 26 preferably resiliently faced as at 21 such as by leather or the equivalent and the heel of the shoe is adapted to be positioned against such stops.

At approximately equal distances from the pivot I3 links 28 and 29 are pivotally mounted on the walking beam as at 30 and 3| respectively. These links serve to suspend small beams 32 and 33 which have at their outer ends seats 34 and 35 adapted to engage over the heel portion of the last L. The movements of these beams are restricted or guided to vertical movements by means of arms 36 which extend rearwardly and slidably engage Vertical guide rods 31 and 38 respectively that are mounted on the back of the table.- Collars 39 and 40 are slidable along the links of these beams so as to be adjustable to the lengths of they last. These collars carry toe engaging portions 4I that are preferably resiliently faced such as by leather indicated at 42. These portions are adapted to engage over the toe of the last and cooperate with the portions 34 and 35 in pressing the lastfand is applied Inaterial downwardly against thetops of the boxes with great effort. Springs 43 and 44 may .connect the beams 32 and 33 to the links 28 and 29 urging the beams into positions wherein the heel seats 34 and 35 are engageable with the lasts L in advance of the toe portionsv 4 I. Thus althoughv the beams 32 and 33 are pivotally connected to the lower ends of the links to accommodate themselves to the last the movements of the `beams, 32 and 33 are restricted to vertical movements by the sliding engagement between the arms 36 and the vertical guide rods 31 and 38.

In theV use of the machine a last having an upper thereonl and having a cemented sole applied thereto is positioned on the upper surface of one of the boxes such as that illustrated in Fig. 1. compressed air or the equivalent to thev pneumatic cylinder IE the Ipistonrod I5 willv be forced.l

upwardly to rock the walking beam I2. about I3.` as a center in a counter-clockwise directiogli.` Asr the last pressing means provided" by the beam 32` descends, its heel seat 34 engages the topof the last over the heel and presses the heel down# wardly. Astheheel usually is of less area than 'theY sole the heel wouldnormaily tend to pene that the pressure aiforded by the liquid within` the box is. evenly distributed even though the` heel may be considerably narrower than the toe.- While the Walking beam isin this positiona last over` the box I8Vmay be removed anda new last Withits applied upper andsole may be installed thereon. The flow of.V uid to the pneumaticcylinder I6 isY then reversed torook thefwalking beamin a clockwisedirection about I3. as acenter to causethe last thatis applied tothe box. I 8` to be pressed downwardly thereagainst in a similar manner and to cause the last pressing -means provided by the beam ,32. to.lii.t.r and release thev last L o n Athe box Il... VWhen, this lastisreleased it 11121.37A be removed and anew. lastv substituted therefor while thepressure-isbeing continuously applied .to the part. positionedzon-the box I8. In this manner, while one shoe is having pressureI applied thereto to cementthesole thereon another last. may be removed; and replaced during this small period of time. Y Y

It willbe appreciatedfrom theabove-described construction that the improved machine is;very simple and highly durable and that While-one shoe is having itsY s ole cemented in place by the application of great; pressure that, another shoe; may bei removedV fromvthe machine and a new shoe applied thereto inits place. The stops at 26 and 2l prevent rearward sliding or slipping and as the heel has its downwardmovement ultimately limited by the blockg24 the action is to On supplying the uid pressure such as 4 occasioned by the necessity of replacing the boxes is greatly reduced if not entirely eliminated.`

Various changes may be made in the details of construction without departing 4from the spirit and SCODe of the invention as defined bythe ap# pended claims. 1

I claim:

1. A machine for cementing shoe soles to upi Y pers comprising a Walking beam, means for pivotally mounting thewalking beam intermediategthe ends thereof, aflexible support beneath .the walking beam on each side of the pivotal Vmounting, last pressing .means on the walking beam over the supports for pressing a last'thereagainst, means for restricting the last pressing means to. vertical movements, and. meansV for rocking the walking beam.V Y

2. A machine for cementing shoe soles to uppers comprising a walking beam, means lfor pivotally mounting the walking beam interme-V diate the ends thereof, a flexible support beneath the walking. beam on each'side .of the pivotal mounting, last pressing `means on the walking. beam over the supports for pressing a last there-V 1 against, means forv restricting the last pressing means to vertical` movements,. and pneumatic means for rocking the walking beam, k

3. A machine for cementing shoe soles to up. pers comprising a walking beam, means Vfor pivotally mounting the walking beamintermef diate the ends thereof, means for rocking the Walking beam, links pivotally connected to the one., beam onA opposite sides of. its pivot, last presse' ing. means. pivotally 'mounted uponv Vthe links,

means on thelinks for guiding the last` pressing means. and` restricting, its movements to. vertical movements, andboxes arrangedbeneath the last..

diate the ends thereof, means for. rocking the'` walking beam, last pressing' means suspended from. the Walking beam equal distances from and v Qn.,opposit.e sides of. the pivot, and' a support press the shoe downwardly against the boxes 'with f a small rolling action from heel to toe which isrhig'hly advantageous. The boxes merely rest by meansjof their flanges on top of the table and in the event that itis necessary to remove and replace either `or both of the boxes this may berreadily accomplished as the boxes need only be lifted out of the apertures in the table that theyoccupv. Consequently Shutdown .timeA the last pressing means may` press a shoe upper andl shoe sole,.and means. restricting the last pressingv means tomovements perpendicular. to n the planes of the supports.

WILLIAM GRIETITH.

ngEEnENoEs CITED The following referenceszareof. record in the v file Vof this patent: Y UNITED STATES.` PATENdT NumberY Name Date 1,495,163 lCasgra'in May 27, 192,4 1,939,510 YMichalk July 27, 1932 2,168,606` Movsesian j Feb. 23, 1938 2,219,419. .Jacobus Nov. 1,5, 1939 2,311,325, Anderson July 24, 19.41,

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