US1280161A - Heeling-machine. - Google Patents

Description

L. A. CASGRAIN. HEELING MACHINE.

APPLICATION FILED JAN. 261917.

INI I 4 I 10g/1m 52 la@ m 124 Patented Oct. 1, 1918.

L. A. CASGRAIN.,

HEELING MACHiNE.

APPLICATION min JAN. 2s. 1911'.

Patented Oct. 1, 1918,

srarns aan o nrc.

LOUIS A. CASGRAIN, 0F BEVERLY, MASSACHUSETTS, ASSIGNOR, BY MESNE ASSIGN- 41V.l}3l1\l"IS, T0 UNITED SHOE MACHINERY CORPORATION, 0F PATERSON, 'NEW JERSEY,

A CORPORATION OF NEW JERSEY.

specification of Letters Patent.

rateateuioet. i, 19in.

Application led January 26, 1917. Serial No. 144,748.

T0 all whom it may concern.' 1

Beit known that I, `Louis A. CASGRMN, a citizen of theUnited` States, residing at Beverly,` in the county of Essex and State of Massachusetts, have invented certain Improvements in Heeling-Machines, of which the following description, in connection with the accompany-ing drawings, is a specification, like reference characters `on the draw ings indicating like partsA in the several figures.

This invention relates to heeling machines, and more particularly to improvements in the general Vtype of heeling machine disclosed in United States Patent No. 1,157,688, granted Oct. 26, 1915.

While heeling' machines of this general type are adapted-and intended for heeling shoes of all kinds, either on or off the wooden last, they are particularlyadapted for heeling shoes upon the wooden last, an operation which .cannot be satisfactorily performed upon all heeling machines. When heeling shoes upon the wooden last, it is necessary preliminarily relatively to position the pressure applying parts of the machine in accordance with the thicknessof the work and the last, in order that the proper amount of final pressure shall be secured without endangering the last by the possible application of excessive pressure. This prelimina ry relative positioningof the jack and the nailing die is commonly `called a measuring operation. Subsequently to the measuring Operation a predetermined amount of additional, so called final, pressure is ap plied to force the parts of the work together and holdA them solidly while the nails are being driven. A

The general object of the present invenT tion. is to simplify and improve heeling machines of the type above referred to, particularly with respect to'the measuring and final pressure mechanisms.

In accordance with the obj ect above stated, a feature of the invention resides in an improved organization of ,mechanism for directly and quickly effecting the measuring operation and following this up by the application of a positive final pressure, the

- amount of which can be easily and accustationary and both the measuring and ,final pressure are` secured by movement of the jack. The initial, or measuring, movement of the jack is preferably effected by adirect acting spring and is followed by a final pressure exerted positively by a cam or equivalentmeans operating through connections which may be locked together at any desired .predetermined point in the lthrow of the cam. As a convenient means to this end, I have devised a fluid transmission which will permit a cam operated slide to move relatively to the `iack actuating element up to a certain :predetermined adjustable point and will thereafter act .as a rigid connection between the elements, ,causing the jack to partake of the movement of the slide.

Another feature of the yinvention relates to the provision of means for preventing damage to the machine in the event of the power mechanism being tripped when no work is in the machine. With machines heretofore in use it has sometimesbeen possible, when no shoe or heel was in the machine, for the measuring *mechanism to bring the pressure applying parts together, after which the positive actuation of the fin al pressure mechanism was liable to produce damage or breakage of parts of the machine. I have. accordingly, provided means for preventing the application of final pressure in the event of the measuring mechanism overthrowing, as would vhe the case if it wereoperated with no work in themachine. In the embodiment of the invention hereinafter .described` the overthrow of the measuring mechanism causes the disconnection of certain elements controlling the Operation of the fluid mechanism above referred to, so that no rigid connection is set up in the fluidrtransmission through which the final pressure is normally applied.

Further features ofthe invention consist inthe provision of improved means for controlling the movements of the heel and top lift carrier and novel mechanism for con trolling the operation of the nail drivers to cause them to be advanced to one point in the operation of blind nailing a heel and to cause them to be advanced further after the nails are driven, to cause a quick ejection of the nail heads from the holes in the nailing die anda quick separation ofthe heelfrom.

the die. A further advantage of this feature of the invention resides in the clearing of the holes in the nailing die of any dust or chips which may have entered.

A further object of the invention is to produce a heeling machine which will operate automatically with high speed and accuracy, and various features and details contributing to this end will appear from the following detailed description of one embodiment ofthe invention, when read in connection with the accompanying drawings; in whichj Figure 1 is a view in side elevation of a machine embodying the invention;

Fig.' 2 is a perspective View upon an enlarged scale, illustrating certain details of the measuring and final pressure mechanism;

Fig. 3 is a vertical section of substantially the same mechanism as that shown in Fig. 2;

Fig. 4 is a fragmentary view of a detail of mechanism for releasing thework from the preliminary measuring pressure; i

Fig. 5 is a view of a. detail of the lui controlling mechanism; i

Fig. 6 is a view of a baliie plate for preventing the escape of the fluid from its containing cylinder; and

Fig. 7 is a perspective view, showing the controlling mechanism for the swinging heel and top lift holder.

The reference numeral 10 indicates a suitable base or frame, upon and in which the operating parts of the machine are mounted. A bracket 12 secured to the frame 10 carries a stationary nailing die and the heel and top lift holder 14. A driver block 16, supporting nail drivers 18 is carried at the upper end of a vertically reciprocating spindle 20, to which movement is imparted by a toggle 22, 24 seated at its lower end in a stationary mounting 26 secured to or forming part of, the frame. A crank shaft 28 is mounted for rotation in stationary bearings and is driven from a suitable source of power through a clutch 30, controlled by a clutch stop 32 secured to a rock shaft 34.

A jack 36 is carried by the vertically slidable working spindle 88 to which` movement is imparted by the top lever 40 mounted for pivotal movement about a journal 42. The back rod 44 is pivotally connected at 46 to the rear end of the top lever 40 and is surrounded by a heavy compression spring 48 bearing upon a washer 50 which is adjustable to increase or diminish the force of the spring by means of a nut 52 threaded upon the back rod 44. The lower end of'A the spring 48 is seated upon a casing 54 secured to the rear face of the frame of the machine. The lower end of the rod 44 enters the upper end. of the casing and is there secured to a plunger 56 mounted for vertical reciprocation within the casing. The plunger 56 is connected by a pin 58, which extends outwardly beyond both sides of the casing 54, to a piston 60 which is fitted in a cylinder 62.

The cylinder 62 and a coperating valve chamber 64 are formed in a slide66 which is guided for vertical movement in the casing. The slide 66 has a depending portion 68 guided at its lower end in a stationary bearing 69 and carrying cam rolls 70, 72 which are arranged to be actuated by cams 74 upon the crank shaft. A rocker member 76 is secured to one end of the pin 58 and is provided with a stop 78 and a flattened face 80 arranged to be engaged by a hook 82 pivoted at 84 to the slide 66. A similar hoo-k 86, pivotally connected to the opposite side of the slide, engages a flattened surface 88 and stop 90 formed upon a rocker member 92 secured to the pin 58 at the end opposite to that which carries the rocker member 76.

The pin 58 and the rocker members se cured to it are rocked by a rod 94 having a lost motion connection with the rocker member 76. The lower end of the rod 94 is connected at 98 to an arm 96the iront endof which is pivotally connected to the center of the toggle 22, 24. Pivoted to the rear end of the arm 96 is a depending finger 100, which is arranged to be engaged by the rear end 102 of a foot treadle 104 pivoted in the 9 machine frame at 106. A link 108 also connects the treadle with a pawl 110 arranged to engage a lug 112 projecting from the lower side of the arm 96. The pawl 110 is pivoted in the upper end of a rocker arm 114 100 secured to theshaft 34. The tension spring 116 acts to draw the-lower end of the finger into engagement with a short arm 118 projecting rearwardly and upwardly from the shaft 34. The parts are so arranged and proportioned that the initial Vdepression of the treadle 104 causes the rod 94 to be raised and to rock the pin 58 sufliciently to throw the hooks 82, 86 off the flattened portions of the rocker members 76, 92. Further depression of the treadle 104 rocksthe pawl 110 until it moves out of engagenient withthe lug 112 permitting the finger 100, under the influence of the spring 116, to operate upon the arm 118 and rock the shaft 84 carrying 115 the clutch stop member 32. This causes the clutch stop member to be disengaged from the clutch and the latter to be thrown into operative condition to produce a revolution of the crank shaft 28.

The cylinder 62 is connected by a port 120 to the valve chamber 64. A sliding valve sleeve 122 is arranged in the valve chamber to open and close the port 120 and, when in its lower, closed, position, embraces a cy- 12.5

lindrical plug 124, with which a tight joint is formed to prevent the passage of fluid through the port 120. To the upper end of the sliding valve sleeve is secured a block 126, see Fig. 5, in which iS secured a sliding 13e valve stem 128 which passes loosely through a projecting bracket 130, formed as part of the casing54. The valve stem is surrounded by a compression spring 132, the upper end 'of which bears upon the under side of the bracket 130, and the lower end of which bears upon the block 126,r so that the-spring constantly tends to' force the valvejdown- Wardly into closed position. The valve is normally held open b-y detent 134 pivoted at 136 to the'slide 66 and caused to engage the beveled lower-face iofl the 'block 126 by a spring 138. A screw 140 is threaded through a projection :P12-upon the detent and is capa'ble ofadjustment-to control the closing of thevalve in a manner about tobedescribed.

Ears 144 depending from the bracket 130 afford a mountingrfor apivotal valve releasing dog-having a-depending tail .1146 and a `projecting nose 148. The dog `is Vnormally held in the position illustrated in Fig. 2 by a spring v150, -but may yield about its pivot when the nose 148 is=struck1by the `plunger 56. Thefblock 126 carries a depending angular' bracket 152 in which is mounted a squared rod 1 54. .Aseries-ofibaiile plates 156 is strung -in'spaced relation upon therod 154 and serves to prevent. the -fl`uid linthe valve vchamberY from splashing out, while still-allowing the air to pass `freely back and forth.

A second foot treadle 158 is connected by a rod 160'to a lever `162,-the'front end of which is pivoted at164 to thecasing 54. A lateral :projection 166-I at the rear end of the lever 162 engages a stop 168 secured uponthe casing 54 toV limitithe upward movement lof the lever. 4When the treadle 158 is depressed, the projection'l66 engages a lug 170 `projecting `from `the "rear faceof the plunger 56, andffby exerting downward force-upon the treadle, the plunger and the backrod '44 may .tbe `drawn downwardly against the resistance of the'spring 48.

In the present embodiment ofthe invention, I have1 illustrated the nailing die 180 as stationary, all the pressureexerted upon the work,lboth in the measuring and final pressure applying operations, being secured by movement of the jack towardthe nailing die. Heretofore, it has been customary in machines of this typeto-.move the nailing die-vertically, and the movement of the heel and top lift holder from heel attaching to top lift attaching position has been `controlled by this movement of the nailing die. One `of the novel features of the present invention resides 1in an improved mechanism for; controlling this movementof the holder. Referring to Fig. 7, 182 `indicates any suitable forrnfof-holder for a heel `and a top lift. VAs shown, the holderi is `mounted for swinging movement in a horizontal plane about the vertical axisz184, and a tension spring 186attached 'to a lug-188 projecting rearwardlyfrom the'sleeve 190, which is integral with or secured to the holder, tends to `-swing the holder in the direction indicated by the arrow. The holder is held in heel attaching position, as illustrated in Fig. 7, against the tension of the spring186, by a stop v1-92secured'to` thcumder side ofthe nailing die andi-engaged by a pawl 194, mounted upon an arm 196, projecting laterally fronn the sleeve 190. A spring pressed pin 198, bearing` upon the pawl, tends to hold itiin engagement with the stop 192. Atappet 200 mounted upon the rear side of the driver block. 16 isarranged to engage the tail lof thepawly194 at the end of the :upward movement of the nail drivers and klto trip the pawl so that, when the pressure upon the work is released, the spring 186 may swing the plate Lin the direction of the arrow, Fig. 7, into top lift attaching position. =After+the top lift is attached `the holder is returned to its initial positionV in the same manner as in the machine described in'fPatent No. 1,157,688, referred to previously.

A further 4feature of improvement involved in the present invention relates to mechanism forinsuring a -qu`ick `separation of the heel `from then aillblock to permit Athe top lift to bemoved` `into attaching `position without interference. Referring toFig. l, the spindle 2O is bored out axially to receive a plunger :21, which` is slottedA for the passage of a pin 23 which holds it in placeand limits its movement. A strong compression spring 25, in the bore in 'the spindle, bears upon the upper end of the plunger 21, tending to hold it inthe position illustrated. The toggle link 22 is connected to the` spindle 2O by a lost motion connection 27 ,the purpose of this being to allow time forvthe final pressure to be applied to the `work before the beginning of the nail driving stroke of the spindle. During the heel attaching stroke of the spindle, theresistance to the movement of the drivers offered by the nails is :suiiicient to cause the plunger 21 to move upwardly against the force of thespring 25 when it is engaged by the toggle link' 22. The spindle 2O and the nail drivers 18 then act inthe usualmanner; but as vsoon as the pressureupon the work is released and, consequently, the resistance to the movement of the-drivers is removed, thespring 25 eX- pands, moving the drivers quickly upwardly until their upper ends areitlush with the surface of the nailing die. This forces the ends of the nails projecting from the heel suddenly from the nailing die and insures that the heel and nailing die will quickly be separated sufficiently to permit theV introduction of the top lift by the swinging movement of its holder. By this quick separation of the heel and nailing die, it becomes possible to operate the machine through two cycles without any pause between the heel attaching and top lift` attaching operation. The machine thus becomes more nearly automatic and a substantial increase in the speed of operation is secured. A further advantage of advancing the drivers until they are Hush with the top of the die is that the driver passages are completely cleaned out at each stroke, no accumulation of dust or leather chips in the holes being permitted.

The operation of the machine will now be described. The machine is shown in Fig. 1 in its stopped position and with the parts all ready for operation. A load of nails having been placed in the nailing die, a heel and top lift in the holder, anda shoe upon the j ack, the treadle 104 is depressed slightly, rocking the pin 58 and throwing the locking hooks 82, 86 out of' engagement. The spring 48 operates promptly and directly to bring the heel seat of the shoe down upon the heel with a substantial amount of pressure. In other words, the work is measured Now, before the'machine is started, the work may be examined in order to ascertain whether or not the shoe and heel are in proper register and position relatively to each other, and if it is desired to make any adjustments the measuring pressure may be released from the work by depression of the treadle 158. When the work is adjusted to the satisfaction of the operator, the treadle 158 is released and the treadle 104 is given a further depression. When this treadle is sufliciently depressed, the pawl 110 is moved out of engagement with the projection 112, and the spring 116 is permitted to draw the finger 100 forwardly against the arm 118, rocking the shaft 34 in a clockwise direction, as seen in Fig. 1. This will `cause the clutch stop arm 32 to be thrown out of engagement with the clutch 30 and the machine to be started.

As the crank shaft 28 rotates in a clockwise direction, the toggle 22, 24 begins to straighten, but by reason of' the lost motion connection between the toggle and the spindle 20, the drivers do not immediately begin to move upwardly. The first thing which occurs by reason of the rotation of the crank shaft is the upward movement of the slide 66, effected by the cams 74. During the initial part of this movement the fluid in the cylinder 62 may fiow freely through the port 120 into the valve chamber 64. At a point, however, in the travel of the slide, which may be adjusted in accordance with the desired final pressure by turning the screw 140, the point of the screw engages the tail of the dog 146 and the detent 134 is operated to release the valve sleeve 122 which descends under the force ofthe spring 132, closing the port 120. After this, the upward movement of the slide is positively transmitted to the piston 60 through the fluid in the cylinder and thence to the rod 44 which rocks the top lever 40 and moves the jack 36 downwardly to exert the final pressure upon the work.

By the time the final pressure is upon the work the lost motion in the connection between the toggle link 2,2 and the spindle 20 has been taken up, and the drivers are then, by further straightening of the toggle 22, 24, advanced to drive the attaching nails through the heel into the shoe.

At the end of the upward movement of the spindle 20, the heel and top lift holder is released by the mechanism already described in detail.

Immediately after the completion of the nail driving operation, the cams 74 arrive at such a position thatl the slide 66 is moved quickly downwardly, drawing the piston 60 with it and raising the jack. The spring 25 expands quickly, insuring the prompt ejection of the heads of' the heel nails from the die, so that the top lift holder will be permitted to move the top lift into attaching position. Near the end of the downward movement of the slide, the head upon the valve rod 128 engages the bracket 130, stopping the movement of the valve' sleeve and opening the port 120. By this time, however, the locking hooks 82, 86 have been drawn by their springs into engagement with the coperating faces upon the rocker members 76, 92 and the measuring spring 48 is thus again held under compression. At the end of the downward movement of the slide the hook upon the detent 134 again engages under the block 126, holding the valve open.

The breaking of the toggle 22, 24 causes the descent of the spindle 20 to its initial position and the rearward movement of the link 96, connnected to the center of the tog` gle, causes the projection 112 to engage the pawl 110 and throw the clutch stop arm 32 back into position to stop the machine, provided the treadle 104 has been released.

Under ordinary conditions the treadle is not released at the end of the heel attaching operation but is held depressed while the machine goes through' another revolution to spank the top lift upon the projecting ends of the heel nails. The parts operate in the same manner, as above described, with the exception that the drivers are not retarded in their movement, but are advanced until their ends are flush with the top of the nailing die, as already referred to in detail, and upon the release of the treadle the machine comes to a stop with the parts in their initial position, as illustrated in Fig. 1.

In the event of the machine being tripped when no work is in it to stop the descent of the jack and the accompanying upward movement of the back rod 44, the plunger 56 will rise .far enough to engage the nose 148 of the valve releasing dog, moving the tail 146 inwardly out, of the path Of the screw 140.- Thus theidetent 134 will not be actuated to release the valve sleeve 122,:but the valve will `be held open andl ino positive, power transmitting connection will be effected between the slide 66 and the rod 41; Any danger of v damagei to the` machine by this abnormal :mode of operation is thus avoided Havingdescribed `the invention, what is claimed asnewfand desired to be secured by Letters Patent is r-4 1. In a heeling machine,.the combination ofiopposedmembers for exerting :pressure upon the work, mechanical means yforeffecting relative `approaching,movement-of said members, fluid power transmission .mechanism throughEA which said movement is transmitted, and means carried by said mechanical means for `automatically controlling .they

effectiveness of said transmission mecha-- nism.

2. In a heeling machine, the combination of opposed, relatively movable members for exerting pressure upon the work, mechanical means for moving one of said members toward the other, fluid power transmission mechanism between said means and the movable member, and means carried by said mechanical means for automatically controlling the effectiveness of said transmission mechanism.

3. In a heeling machine, the combination of relatively movable members for exerting pressure upon the work, power actuated means for moving one of said members toward the other, fluid power transmission mechanism between said means and the movable member, and means operated by movement of said power actuated means for controlling said fluid mechanism to cause it to form an unyielding power transmitting connection.

4. In a heeling machine, the combination of relatively movable members for exerting pressure upon the work, power actuated means for moving one of said members toward the other, normally yielding fluid power transmission mechanism between said means and the movable member, and means operated by movement of said power actuated means for controlling the fluid to cause it to form an unyielding power transmitting connection at a predetermined point in the operation of the machine.

5. In a heeling machine, the combination of power operated, automatic measuring mechanism, and automatic final pressure mechanism embodying fiuid power transmission mechanism.

6. In a heeling machine, the combination of a nailing die and a i ack, one of which is movable toward and from the other, automatic means for moving one of said elements toward the other to measure the work, automatic means for imparting additional movement to said element to subJect the work to final pressure, fluid power transmission mechanism between ,l the e last mentioned means and lthe movable element, and means for controlling t-heconditionsnunder which thel fluidy power` transmission mechanism shall become operative.

7. In 1.a heeling machine,.the combination of measuring'- mechanism, positively oper.- ated hfinal pressure mechanism, mechanism for transmitting. lforce from 4the final `pressure. mechanism lto theI work, and means for rendering the' transmitting ,mechanism in.-` operative `inthe event of abnormal operation ofthe measuring mechanism...1

8.'In a heelingmachine,I the combination of measuring .mechanism,..positively operated final pressure mechanism, mechanism for transmitting `force'` from- .the final :pressuref mechanism to the work, and means for rendering the transmitting mechanism inoperative in the event of an overthrow of the measuring mechanism, consequent upon its operation when there is no work in the machine.

9. In a heeling machine, the combination of a movable member for exerting pressure upon the work, positively operated means for moving said member, connections for transmitting force from said means to said member including a normally freely flowing body of fluid, and means, acting only when said member has engaged the work, for stopping the flow of the fluid, to render the connections operative.

10. In a heeling machine, the combination of a movable member for exerting pressure upon the work means for preliminarily moving said mem er into engagement with the Work, a positively operated slide for moving said member, connections between said slide and member comprising a cylinder having a normally open fluid eXit and containw ing a body of fluid, a piston in said cylinder, and means for closing said exit to cause the fluid to form a force transmitting connection between the cylinder and piston.

11. In a heeling machine, the combination of a nailing die, nail drivers, means for ad vancing the nail drivers to a position for attaching a blind nailed heel, and means for advancing the drivers further until their ends are substantially flush with the face of the nailing die, to cause a quick separation of the heel therefrom.

12. In a heeling machine, the combination of a nailing die, nail drivers, means for advancing the nail drivers to position for attaching a blind nailed heel, and means for advancing the drivers further to clean out the holes in the nailing die.

13. In a heeling machine, the combination of nail drivers, actuating means for said nail drivers having an unvarying amount of movement, and connections between said actuating means and the drivers acting first 130 to permit a fixed, definite amount of yielding When the drivers encounter the resistance of driving the nails, and thento transmit the driving force positively to the drivers, Whereby a different amount of movement is imparted to the drivers when resistance is encountered from that imparted to them when no resistance is encountered.

14. In a machine of the class described, the combination of measuring mechanism, positively operated final pressure mechanism, mechanism for transmitting force from the linal pressure mechanism to the work, and controlling means for the transmitting mechanism constructed and arranged to cause said mechanism to act positively when the measuring mechanism has operated normally and to yield When the 'measuring mechanism has operated to an abnormal eX- tent.

15. In a machine of the class described, the combination of a Work engaging member, measuring mechanism, povver driven final pressure mechanism, yielding` power transmitting connections between the inal pressure mechanism and the Work engaging member, and means controlled by the measuring mechanism for making said connections rigid.

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

LOUIS A. CASGRAIN.

Copies ofthis patent may be obtained for ve cents each, by addressing` the Commissioner of Patents,

Washington, D. C.

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