US2104138A - Trimming machine - Google Patents

Description

Jan. 4, 1938. R. H. SEER TRIMMING MACHINE Filed March 13, 1956 2 Sheets-Sheet 1 Jan. 4, 1938. R. H. SEER 3 TRIMMING MACHINE Filed March 15, 1956 2 Sheets-Sheet 2 78 if; J Q g Hg. 5.

was 92 a1 4 y/A/v/f/vm/v 6 83 (3d Patented Jan. 4, 1938 UNITED STATES PATENT OFFICE TRILIMING MACHINE Application March 13, 1936, Serial No. 68,746

16 Claims.

This invention relates to machines for removing surplus upper material from shoes and is herein illustrated in its application to bed lasting machines such, for example, as the machine illustrated in. the patent to Brock, No. 1,018,477, dated February 27, 1912.

It is one object of the invention to provide a power-operated cutting or trimming device which may be used in the course of the lasting operation just before the lasting wipers lay the overlasting margin of the upper over upon the margin of an insole on the last bottom. It is the purpose of the cutter to remove marginal material from an end portion, for example the toe portion of the upper, in order to reduce the bulk of the substance at the end of the shoe bottom to prepare the shoe bottom for the reception of an outsole.

With the above object in view the invention in one aspect thereof comprises a novel machine for removing surplus upper material from shoe parts including a pair of cutters one of which is secured to a handle and the other .of which is mounted in the handle for reciprocating movement toward and from. the stationary cutter. For operating the movable cutter there are mounted in the handle members herein illustrated as a driven rotor and a driving rotor and means is provided in the handle for operatively connecting said rotors. There is also provided in the handle means for disengaging the rotors with the cutter jaws in their open position. The illustrated cutters are constructed and arranged to out a V notch in the marginal portion of a shoe upper, and are herein illustrated as relatively movable shear members which are so constructed and arranged that they begin their operation at the point of the V notch and Work progressively outwardly and sever the clip at the edge of the upper.

Preferably a machine embodying my invention is provided with means for supporting an inverted shoe in a fixed position during all or a part of the lasting operation and while the uppertrimming member is operated step-by-step around the margin of the shoe bottom at the will of the operator. As herein illustrated, the supporting means includes a toe post and a toe-embracing band such as are commonly employed in bed lasting machines.

These and other features of the invention will now be described with reference to the accompanying drawings and pointed out in the appended claims.

In the drawings,

Fig. l is a perspective view of part of the toe head of a bed lasting machine and a cutter embodying the features of the present invention operating on a shoe;

Fig. 2 is a sectional elevation through the center of the cutter looking from the right of the 5 cutter as seen in Fig. 1;

Fig. 3 is a sectional plan view taken substantially on the line III-III of Fig. 2;

Fig. 4 is a detail view showing the cutter jaws at an intermediate stage in the cutting stroke;

Fig. 5 is a front elevation partly in section illustrating the cutter and parts of its operating mechanism;

Fig. 6 is a detail view in side elevation of certa'in parts illustrated in Fig. 5 looking from the right of the machine as illustrated in Fig. 5; and

Fig. 7 is a sectional view similar to Fig. 2 showing the upper portion of the cutter unit with the parts in a position different from that illustrated in Fig. 2. 20

Referring to Fig. 1, the illustrated bed, lasting machine is provided with the usual Work supports including a toe post Ill and is provided with operating means including the usual toe-lasting wipers 12 which hold the toe portion of the upper IS in upwiped position while surplus material is removed from the upstanding margin l8 of the toe portion of the upper by the cutting mechanism hereinafter described.

Referring now to Fig. 5, the illustrated machine is provided with the usual upward extension 20 of the frame on which it is mounted, the usual portable hand tacker 2| and the tack-delivering mechanism therefor. Extending outwardly and upwardly from the upper portion of the extension 20 is an arm or bracket 22 to the upper end of which there is secured one end of a static-nary horizontal shaft 24. On this shaft there is rotatably mounted a large rotor or pulley 26 and a cam member or sleeve 28 rotatable through a limited angle. On said sleeve 28 there is journaled a small pulley 30. Secured to the sleeve 28 between the small pulley 30 and the top of the bracket 22 is an upwardly extending arm. 32 in the upper end of which is journaled-a rotary shaft 34 to one end of which there is secured a. rotor or pulley 36 which is connected by a belt 36 to the large pulley 26. The small pulley 30 is driven .by connections from a motor (not shown) including a pulley 40 which is operated by a motor-driven belt 42 and which rotates a pulley 44 which is belted to the small pulley 30. For transmitting the rotation of the small pulley 30 to the large pulley 26 a simple form of clutch mechanism is provided. As illustrated in Fig. 5,

this clutch mechanism comprises a beveled face formed in the inner wall of flange 45 projecting from the large pulley 26 toward the small pulley and a beveled face formed in the exterior wall of a, flange 48 projecting from the small pulley toward the large pulley. Said beveled faces are brought into frictional engagement with each other'by a downward movement of the swinging arm 32 whereby the cam sleeve 23 is turned in a counterclockwise direction, as seen in Fig. 6.

During such rotation of the sleeve 28 a cam face 50 (Fig. 5) at one end of the sleeve operates against a stud 52 projecting outwardly'from the upper end of the bracket 22, thus moving the sleeve and the small pulley 39 mounted thereon in a direction to effect interengagement of the clutch faces of the small pulley and the large pulley 26. When the swinging arm-is returned to its initial position a compression spring '54 coiled about the fixed shaft 24 and positioned between the hub of the large pulley 26 and one end of the sleeve 28 expands to the extent afforded by the cam motion of the sleeve, thereby disengaging the pulleys. The swinging arm 32 is normally held in its upward position, as illustrated in Fig. 6, by a spring 56 one end of which is connected to the bracket 22 and the other end of which is connected to a short arm 58 projecting from the lower end of the swinging arm 32 and arranged to be held by the spring 56 against a stop 51 projecting from the bracket 22.

The illustrated cutter unit, which is indicated generally by the reference numeral 15in Fig. 5, comprises relatively movable shear members or cutter jaws 82 and 88 carried at the'lower end of a hollow handle within winch there is mounted cutter-actuating mechanisms including a planetary reduction gearing and a finger-oper ated clutch mechanism. The construction of the illustrated cutter unit is hereinafter described. The cutter unit is suspended from the free end of the arm 32 by connections hereinafter de scribed, said connections, as herein illustrated, serving not only to support the cutter unit but also to transmit power from the rotary shaft 34 to the cutter jaws. When the cutter is at rest it is suspended in the position illustrated in Fig. 5 by the tension of the spring 53 operating on the swinging arm 32 as above described. The arm 32 supports the cuttenunit above its operating plane and the downward movement of the swinging arm whereby the pulleys 26 and 38 are brought into engagement'with each other occurs as the operator moves the cutter unit downwardly from its rest position, as illustrated in Fig. 5, to its operating position, as illustrated in Fig. 1. Thedownward movement ofthe cutter unit into its operating position does not connect the cutter jaws to the source of power but merely sets in motion a driving rotor contained within the cutter unit, the cutter jaws being operated by a driven rotor contained within the cutter unit which is connected to the driving rotor by mechanism controlled .by'the operator and hereinafter described. The illustrated connections from the shaft 34 to the driving rotor of the cutter unit include a connecting shaft 60 the upper end of which is journaled in a bearing 62 projecting downwardly from a hemispherical shell 64 which provides the outer portion of a gimbal joint connecting the shaft 3 and the shaft- 60. The shell 64 is pivotally mounted on a cross shaft 68 carried by an inner hemispherical shell or gear housing 66 and arranged at right angles both to the shaft 34 and to the the upper end of the handle 88.

the shaft 34 and arranged to mesh with an idler 14 on the cross shaft 68 which, in turn, meshes with a beveled pinion I6 fixed to the connecting shaft 60. At its lower end the connecting shaft 60 has a universal connection to a gear shaft I8 projecting upwardly from the hollow handle 83 of the cutter unit. The outer shell 64 provides a reservoir for lubricating oil and an oil guard I9 (Fig. 5) is secured to said shell to prevent escape of oil through the clearance opening BI in the shell.

Referring now to Fig. 2, the illustrated cutter unit includes a fixed cutter jaw 82 which is secured between ears 83 which project downwardly from a transverse extension 84 of the lower end of the'handle 80. The cutter jaw 82 is formed to cut a V-shaped notch such, for example, as the notch 86 (Fig. 1) illustrated in the upstanding margin I8 of the upper. Cooperating with the fixed jaw 82 is a movable jaw 88, herein illustrated as a cutting bladeconstructed and arranged to embrace the fixed cutter jaw 82 and inconjunction therewith to exert a shearing ac- V eating the movable cutterjaw 88 a roll 82 is pivoted on an eccentric stud 34 projecting down- 1 wardly from a head 96 at the lower end of a shaft 58'contained within the handle 88. The roll 92 operates in a transverse groove I88 (Fig. 3) provided in the upper surface of the slide 33.

' The shaft 98 is splined to a hollow driven rotor I82 journaled in the hahdleBIl and providing'one element'of a clutch whereby the shaft 88 is connected to the gear shaft I8. The other element of said clutch is a hollow driving rotor I84 journaled in the handle 80 above the driven rotor I 02. Extending upwardly from the driving rotor I84 is a sleeve I86 which provides a bearing for the upper portion of the shaft 88. The upper end of the sleeve'IIlG is flanged outwardly and carries an internal gear I68 which in the illustrated construction is formed integrally with the sleeve. The gear l88 forms part of a planetary gear-reduction mechanism between the shaft I8 and the driving rotor I04. The other element of the gear reduction mechanism is a rotary member I I0 having upper and lower annular sections of different external diameters, the lower section having gear teeth which mesh with the teeth in the internal gear I08, while the upper section is provided with gear teeth which mesh with 1 internal teeth formed in a gear housing H2 at For transmitting orbital movement to the gear member M3 the shaft I8 is provided with an eccentric bearing II4 on which the member H0 is jcurnaled. It will be understood that the relation of the ratio between the upper gear teeth of the gear member III] and the teeth in the gear housing I I2 to the ratio between the lower teeth in the member III] and the internal gear I68 is such that the rotor I04 turns at a much slower speed than the gear shaft I8, the speed reduction being sufficient to enable the operator to control without great effort the tendency of the entire cutter unit to rotate when the driven rotor I02 is brought into engagement with the driving rotor I04.

For transmitting its rotation to the driven rotor I02 the driving rotor I04 is provided with an undercut tooth H6 and the driven rotor is provided with a corresponding tooth I I8 which projects upwardly therefrom and is movable into the path of movement of the tooth II6 by a compression spring I20 which is coiledabout the lower portion of the hub of the driven rotor and confined between a flange I22 on the hub of the rotor and the head of the shaft 08. For holding the driven rotor at the limit of its downward movement with the tooth II8 out of engagement with the tooth H6 in the driving rotor, a roll I 24 is pivotally mounted on a slide I26 for movement through an aperture in the wall of the handle 80 to and from position to engage a helical cam face provided in the top of the driven rotor I02 and extending upwardly from the base 'of the inner surface of the tooth I I8 to the upper extremity of said tooth. When it is desired to connect the cutter jaws to the source of power the operator presses inwardly on the upper end of a finger lever I28 (Figs. 1 and 2) the middle portion of which is pivoted between parallel flanges I30 projecting outwardly from. the handle 80. The

' lower end of the finger lever I28 engages a notch part of the lever provided in the upper surface of the slide I26 and it will be seen that pressure of the operators finger at the upper end of the lever I28 operates to withdraw the roll I 24 from the interior of the handle and out of the path of the driven rotor I02, thus permitting the spring I20 to lift the driven rotor into engagement with the driving rotor. The roll I24 is normally held in its position in Fig. 2 by a spring I32 one end of which is seated in a socket in the handle 80 while the opposite end is seated in a socket in the upper I28. The flanges I30 are grooved, as indicated at I34 in Fig. 1, to provide guideways for the slide I26. To hold the slide against rotation a stud I36 (Fig. 2) projects downwardly from the slide between the inner walls of the flanges I30.

Since the driving rotor I04 is rotated at a relatively slow speed by reason of the reduction gearing above described, the momentum of the driven rotor I02 is inappreciable as it moves downwardly against the roll I24 to break the connection between the rotors and consequently the rotor I02 comes to rest immediately upon disengagement of the teeth H6 and H8. It is therefore necessary to provide meansfor moving the rotors away from each other after the teeth have disengaged in order to avoid undue wear of the teeth by clicking of the driving rotor against the tooth of the driven rotor during the continued rotation of the former after the latter has come to rest. In the illustrated machine such movement of the rotors away from each other is effected by a plurality of springs, one of which is illustrated at I38 in Fig. 2 seated in a socket in the inwardly extending portion of the gear housing II2. Said springs operate against a washer I40 under the flange of the sleeve I 06, said washer being held from rotation by a stud I42 projecting downwardly therefrom into a socket in the gear housing. During the first stage of the rotation of the driven rotor by the driving rotor following the return of the roll I24 to its operative position, the driving rotor is moved downwardly against the compression of the springs I38 by reason of the undercut construction of the teeth H6 and H8. Downward movement of the driving rotor continues until the space between the washer I 40 and the inwardly extending portion of the gear housing has been taken up. Continued rotation of the driving rotor thereafter causes a gradual separation of the rotors and when the teeth II 6 and H8 are so nearly disengaged that the upward pressure of the springs I38 tending to disengage the rotors is greater than the frictional resistance to such movement caused by interengagement of said teeth, the driving rotor is lifted by said springs into a position in which it is suflicently removed from the driven rotor toobviate clicking of the tooth I I6 of the driving rotor against the tooth II8 of the driven rotor during the continued rotation of the driving rotor.

In the operation of the illustrated cutter the operator may advance the finger lever I28 and. hold it advanced while he transfers the point of operation of the cutter along the overlasting margin I8 of the upper, in which case the cutter jaw 88 will reciprocate without stopping between cuts and the spacing of the notches 86 will depend on the speed of movement of the cutter unit by the operator. If the operator prefers to have the cutters come to rest in their open position before transferring the point of operation of the cutters for the next cut this may be done by merely releasing the finger lever I28 after each cut and transferring the point of operation of the cutter while the finger lever remains in its retracted position.

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 removing surplus upper material from shoes, a pair of cutters comprising a stationary cutter jaw, a handle therefor, a movable cutter jaw mounted in the handle for reciprocating movement toward and from the stationary cutter jaw, a driven member mounted in the handle and operatively connected to the movable cutter jaw, a driving member mounted in the handle, means in the handle for connecting the driving member and the driven member, and means in the handle for disengaging said members with the cutter jaws in their open position.

2. In a machine for removing surplus upper material from shoes, a pair of cutter jaws, a handle therefor, a driven member mounted in the handle and arranged to effect closing and opening movements of the cutter jaws, a driving member mounted in the handle, means in the handle for operatively connecting the driven member and the driving member, and means operable at the will of the operator tocause the driven member and the driving member to disengage with the cutter jaws open.

3. In a machine for removing surplus upper material from shoes, a power-operated cutter comprising a pair of cutter jaws, a handle therefor, a driven member in the handle constructed and arranged to operate the cutter, a driving member in the handle, means in the handle for operatively connecting the driving member and the driven member, means for disengaging the driving member and the driven member with the cutter jaws open, and means operating after the driven member has come to rest to space the driving member therefrom.

4. In a machine for removing surplus upper material from shoes, a pair of cutter jaws, a handle therefor, a driven member in the handle constructed and arranged to impart opening and closing movements to the cutters, a driving member, means operating on the driven member to 75 bring it into engagement with the driving mem ber, and means for disengaging the driven member from the driving member comprising a cam carried by the driven member and a retractable roll constructed and arranged to act on said caml to cause the driven member and the driving member to disengage with the cutter jaws open.

5. In a machine for removing surplus upper material from shoes, a pair of cutters, a handle therefor, a driven member in the handle con-' structed and arranged to operate the cutters, a driving member in the handle, a sleeve upon which the driving member is mounted, a powerdriven shaft projecting into said handle, reduction gearing operatively connecting said shaft to said sleeve, means operating on the driven memher to bring it into engagement with the driving member, and means operating at the will of the operator to disengage the driving member and driven member with the cutter in open position.

6. In a machine for removing surplus upper material from shoes, a pair of cutters, a handle therefor, a driven member in the handle constructed and arranged to operate the cutters, a driving member in the handle arranged for movement toward and from the driven member, yielding means for holding the driving member at the limit of its movement from the driven member,

means operating at the will of the operator to move the driven member into engagement with the driving member, means for effecting return movement of the driven member during its actuation by the driving member, and connections between the driven member and the driving member which yi-eldingly resist separation of said members. 7

7. In a machine for removing surplus upper material from shoes, a pair of cutters, a handle therefor, a driven member in the handle constructed and arranged to operate the cutters, a driving member in the handle constructed and arranged for limited movement endwise of the handle toward and from the driven member, yieldingmeans for holding the driving member at the limit of its movement from the driven member, means operating at the will of the operator for moving the driven member endwise of the handle into engagement with the driving member, inter'engaging undercut teeth in 'the driving member and the driven member, respectively, whereby rotation of the driving member is imparted to the driven member and whereby movement of the driven member endwise of the handle during rotation of said member is imparted to the driving member. 7

8. In a machine for removing surplus upper material from shoes, a pair of cutters, a handle therefor, a driven rotary member constructed and arranged to operate the cutters, a rotary driver constructed and arranged to operate said driven member, a hollow stem on which the cutters are mounted, means for moving the driven member l.

ment of the driven member. endwise of the stem to the driver.

9. In a machine for removing surplus upper material fromshoes, a, pair of cutters, a driven rotor constructed and arranged topperate said cutters, a driving rotor for'operating the driven rotor, a stem within which said rotors are contained, means for moving the driven rotor endwise of the stem into engagement with the driving rotor, means operating at the termination of the opening movement of the cutters to move the driving rotor endwise of the stem away from the driven rotor, interengaging undercut teeth formed in the driven rotor and the driving rotor, respectively, and means for moving the driven rotor endwise of the stem from the driving rotor during rotation of the driven rotor comprising a cam member on the driven rotor, a cooperating cam roll, a slide on which the roll is mounted, said slide being movable through an opening in the stem to carry the roll to and from operative position, means manually operable to move the slide outwardly from the stem, and yielding means for moving the slide inwardly of the stem. V

10. In amachine for removing surplus upper material from shoes, a cutter, a swinging arm whereby the cutter is normally suspended above its operating plane, power-actuated means for operating the cutter including a driving member and a driven member mounted coaxially with said swinging arm, said driven member being movable in the direction of its axis to effect operating connection of; the members, means operated by movement of the swinging arm during the advancement of the cutter from its normal position to its operating plane to cause the driving member to engage the driven member, and operating connections between the swinging arm and the cutter including a fixture, a gimbal joint connecting the fixture to the free end of the swinging arm, and a shaft projecting from the fixture and operatively connected to the driven member.

11. In a machine for removing surplus upper material from shoes, a cutter, a fixed shaft, a rotor on said shaft for receiving motive power, another rotor on said shaft for delivering motive power, a rotary shaft driven from said last-named rotor, means on which the rotary shaft is mounted for arcuate movement about said fixed shaft, a gear housing freely mounted on the rotary shaft, a connecting shaft, a bearing member'therefor pivoted to the gear housing, gearing operatively connecting the rotary shaft to the connecting shaft, and operative connections from the connecting shaft to the cutter. I

12. In a machine for removing surplus upper material from shoes, a cutter, a fixed shaft, a rotor on said shaft for receiving motive power, another rotor on said shaft for delivering motive power, a rotary shaft driven from said last-named rotor, means on which the rotary shaft is mounted'for arcuate movement about said fixed shaft, a gear housing freely mounted on the rotary shaft, a connecting shaft, a bearing member therefor pivoted to the gear housing, gearing connecting the rotary shaft to the connecting shaft, and operative connections from the connecting shaft to the cutter including a driving element, a driven element, and a one-revolution clutch mechanism all contained within a handle by which the cutter may be manipulated.

13. In a machine for removing surplus upper material from shoes, a cutter, a hollow stem extending upwardly from the cutter,a driven shaft extending upwardly from'the top of thestem, a connecting shaft having a universal connection to said driven shaft, a vertically swinging arm, a fixture connected to the free end of said arm by a gimbal joint, said connecting shaft being journaled in said fixture and supported thereon against endwise movement, thereby to provide a support for the cutter, a driven shaft in the free end of said arm, and operating connections between the driven shaft and the connecting shaft.

14. In a machine for removing surplus upper material from shoes, a cutter, a hollow member extending upwardly therefrom, power-actuated means for operating said cutter comprising a driving pulley and a driven pulley, a fixed horizontal shaft on which said pulleys are coaxially mounted, a swinging arm mounted on. said shaft, a rotary horizontal shaft journaled at the free end of said arm, operating connections between the driven pulley and the rotary shaft, a connecting shaft carried by said swinging arm, operating connections between the rotary shaft and the connecting shaft, a rotary element in the hollow member of the cutter operatively con-- nected to said connecting shaft, a second rotary element in said hollow stem constructed and arranged to operate the cutter, and means operable at the will of the operator for operatively connecting said rotary elements.

15. In a machine for removing surplus upper material from shoes, means for cutting a V notch in a marginal portion of a shoe upper comprising relatively movable shear members so constructed and arranged that they begin their operation at the point of the V and work progressively outwardly and sever the chip at the edge of the upper.

16. In a machine for removing surplus upper material from shoes, means for cutting a V notch in a marginal portion of a shoe upper comprising a stationary shear member and a cooperating shear member constructed and arranged for rectilinear movement relatively to the stationary shear member, said shear members being so constructed and arranged that they begin their operation at the point of the V and work progressively outwardly and sever the chip at the edge of the upper.

RICHARD H. SEER.

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