US2994882A - Heel attaching machines - Google Patents

Description

A g- 1961 w. F. M KENZIE ET AL 2,994,882

HEEL ATTACHING MACHINES Filed Jan. 7, 1959 16 Sheets-Sheet 2 Aug. 8, 1961 w. F. M KENZIE ET AL 2,994,882

HEEL ATTACHING MACHINES Filed Jan. 7, 1959 16 Sheets-Sheet 5 Aug. 8, 1961 w. F. MacKENZIE ET AL 2,994,882

HEEL ATTACHING MACHINES Filed Jan. 7, 1959 16 Sheets-Sheet 4 Aug. 8, 1961 w. F. M KENZlE ET AL 2,994,882

HEEL ATTACHING MACHINES Filed Jan. '7, 1959 16 Sheets-Sheet 5 Aug. 8, 1961 w. F. MaCKENZlE EIAL 2,994,882

HEEL ATTACHING MACHINES Filed Jan. 7, 1959 16 Sheets-Sheet 7 Aug. 8, 1961 w. F. MacKENZlE ET AL 2,994,882

HEEL ATTACHING MACHINES Filed Jan. 7, 1959 7&6 Sheets-Sheet 8 1961 w. F. M KENZIE ET AL 2,994,882

HEEL A'fTACI-IING MACHINES- Filed Jan. 7, 1959 16 She Aug. 8, 1961 w. F. M KENZlE ET AL 2,994,882

HEEL ATTACHING MACHINES Filed Jan. 7, 1959 16 Sheets-Sheet l0 Aug. 8, 1961 w. F. M KENZiE ET AL 2,994,882

HEEL. ATTACHING MACHINES Filed Jan. 7, 1959 16 Sheets-Sheet ll Aug. 8, 1961 w. F. M CKENZIE ET AL 2,994,882

HEEL ATTACHING MACHINES Filed Jan. 7, 1959 16 Sheets-Sheet 12 I & llilllllllllllllllllllllllllllllll I Aug. 8, 1961 w. F. M QKENZlE ET AL 2,994,882

HEEL ATTACHING MACHINES l6 Sheets-Sheet 13 Filed Jan. 7, 1959 Aug. 8, 1961 w. F. M CKENZIE ET AL 2,994,882

HEEL ATTACHING MACHINES 16 Sheets-Sheet 14 Filed Jan. '7, 1959 Aug. 8, 1961 w. F. M KENZIE EI'AL 2,994,882

HEEL ATTACHING MACHINES Filed Jan. 7, 1959 1s Sheets-Sheet 16 United States Patent 2,994,882 HEEL ATTACHING MACHINES William F. MacKenzie, Hamilton, and Ferman N. Lee, deceased, late of Danvers, Mass, by Dolores R. Lee, executrix, Binghamton, N.Y., assignors to United Shoe Machinery Corporation, Flemington, NJ., at corporation of New Jersey Filed Jan. 7,-1959, Ser. No. 785,462. 20 Claims. (Cl. 1-139) This invention relates to machines for attaching rubber heels and leather heels and their toplifts to shoes by outside nailing and is illustrated as embodied in an improved machine of the general type disclosed in United States Letters Patent No. 2,746,046, granted May 22, 1956, on an application filed in the names of Ferman N. Lee, William F. MacKenzie, Alfred C. DArcey and Alfred C. Cicchetti.

The machine disclosed in said Patent No. 2,746,046 is provided With a nailing die, which has driver passages extending through it, and nail drivers which slidingly lit in said passages and at all times are assembled with the nailing die for installation as a unit in a pair of cavities formed in the frame of the machine. Nails are supplied to the nailing die from a tube holder by the use of a loader block which has nail passages formed in it and is moved between a loading position beneath the tube holder and a dumping position above the nailing die. The passages of the associated nailing die and the loader block are of the same pattern, four nailing die and driver units and four loader blocks corresponding respectively to said units being necessary to accommodate a complete run of sizes. In most factories the shoes arrive at the machine on racks, said shoes usually being of split sizes, and accordingly it is necessary frequently to change the nailing die and driver unit and the loader block of the machine to accommodate the shoes with the result that the production of the machine is materially reduced.

It is an object of the present invention to provide a machine which will quickly and effectively attach rubber heels and leather heels and their toplifts to shoes and which has none of the above-mentioned drawbacks. With the above object in view, and in accordance with a feature of the present invention, the illustrative machine is provided with a turret having mounted on it in circumferentially spaced relation a plurality of nailing die and driver units which are of different patterns and are adapted to accommodate a complete run of sizes of shoes, said turret being rotatable into different initially operative positions so that the operator may quickly and effectively move any one of the nailing die and driver units into an active operating position at a heel attaching station of the machine. By providing such a construction the time consuming changeover referred to above of the nailing die and driver units, now used in present commercial machines as well as in the machine disclosed in said Patent No. 2,746,046, is avoided. In order to eliminate in the present machine the use of the loader block and the necessity of changing said block as above explained, to accommodate a full run of sizes of shoes, the turret, in accordance with another feature of the invention, is automatically rotated in one direction to move the active nailing die of the turret beneath the tube holder to receive a load of nails and in an opposite direction to move the nailing die back to the heel attaching station.

In the attachment of the leather heel to the shoe by the use of the present commercial machines heavy pressure is exerted against the last upon which the shoe is mounted in order to hold it against the force imparted to the shoe by the heel attaching nails which are all driven simultaneously into the heel and the heel seat of the shoe and are clinched against the heel plate of the last, the pressure exerted on the last during this operation often being sufficient to break the last. It is another object of the present invention to reduce the pressure applied to the last during the attachment of the leather heel to the shoe. With this object in view and in accordance with another feature of the present invention the illustrative machine is provided with primary and secondary sets of drivers, fluid pressure operated means for actuating said sets of drivers in succession, and mechanism hereinafter described for insuring that all the nails shall be driven to the same depth into the work.

The present invention consists in the above novel features and in novel features which are hereinafter described and are directed to improvements in the automatic control of a heel and toplift carriage of the machine, means for selectively setting up the machine to operate either on rubber or leather work, and means for improving the feeding of nails to the tube holder of the machine, reference being had to the accompanying drawings which illustrate one embodiment of the invention selected for purposes of illustration, said invention being fully disclosed in the following description and claims.

In the drawings,

FIG. 1 is a perspective view from the front and the left of the illustrative machine;

FIG. 2 is a right side elevation, partly broken away and partly in section, of the machine;

FIG. 3 is a perspective view showing the interior of a portion of the machine, a front cover of which has been removed;

FIG. 4 shows in front elevation, partly broken away and partly in section, a turret with sets of nailing die and driver units mounted on it, a vertical shaft which is journaled for movement about an axis, and means for securing the turret in different operating positions to the shaft and for disconnecting it from said shaft;

FIG. 5 is a plan view, partly in section, on the line VV of FIG. 2 showing a carriage for a heel and a toplift arranged above the turret, and mechanism for use in positioning the heel and the toplift over an active nailing die which is mounted in the turret and is arranged at a heel attaching station of the machine;

FIG. 6 is a view showing portions of the carriage actuating mechanism of the machine as viewed from the rear;

FIG. 7 is a view similar to a portion of FIG. 5 showing a carriage adapted to support a rubber heel which is to be attached to a shoe, said carriage at all times remaining in a fixed operating position;

FIG. 8 is a view, partly in section on the line VIII- VIII of FIG. 5, showing details of the vertical shaft and the turret;

FIGS. 9 and 10 are sections on the lines IX-IX and X-X of FIG. 8 respectively;

FIG. 11 is a view, partly in side elevation and partly in section of nail driving mechanism and fluid pressure actuated means for operating said mechanism;

FIG. 12 shows the mechanism illustrated in FIG. 11 partly in side elevation and partly in section on the line XII--XII of FIG. 11;

FIG. 13 is a front view of a nail distributor of the illustrative machine;

FIG. 14 is a section on the line XIVXIV of FIG. 13 showing a nail conduit and a nail roll from which nails are dumped into said conduit;

FIG. 15 shows in front elevation, on an enlarged scale and partly broken away, portions of the distributor shown in FIG. 13;

FIG. 16 is a plan view of the portion of the distributor shown in FIG. 15;

FIG. 17 is a plan view of a portion of the right side 1 of the nail distributor showing clutch mechanism ineluding 'a lever for controlling vibration of the the distributor and also showing a switch which is operative in response to movement of said lever;

FIG. 18 is a side view of a gage which is used for centralizing the heel seat of the shoe with its heightwise median longitudinal plane in alinement with a vertical median plane of an active nailing die at the heel attaching station of the machine;

FIG. 19 is a plan view on the line XIXXIX of FIG. 18;

FIG. 20 is a front view of the gage shown in FIG. 18;

'FIG. 21 is a schematic diagram showing fiuid pressure means for operating the illustrative machine;

FIG. 22 is a detail View of a switch which is operative in response to movement of a jack actuating control rod and is also shown in FIG. 2;

FIG. 23 is a view showing in detail a treadle of the machine;

FIG. 24 is a wiring diagram for use in describing the operation of the machine;

FIG. 25 is a perspective view of a battery of four tube holders which are mounted on a platform and any one of which may be selectively moved to an active position beneath a foot plate of nail distributing mechanism of the machine;

FIG. 26 is an exploded view, partly broken away and partly in section, showing in perspective the rear end of a shoe to which a leather heel has been attached by the use of the illustrative machine and also showing a top- ]ift which is to be spanked onto the heel; and

FIG. 27 is a perspective view, partly broken away and partly in section, of a rear portion of a shoe to which a rubber heel and its base lift have been attached by the use of the machine.

The illustrative machine is described with reference to the attachment of a leather heel 30 and its toplift 32 to the heel seat of a shoe 34, which is mounted on a last 36, by the use of cut nails 38 (FIG. 26) and also with reference to the attachment of a rubber heel 40 (-FIG. 27) and a base lift 42, which is spotted thereto, to the heel seat of the shoe by the use of headed nails 44.

The machine comprises a jack or support 46 (FIGS. 1, 2, 3 and 21) upon which the shoe 34 on the last 36 is mounted an active nailing die or support 48 which is mounted on a turret or carrier 49, a carriage 50 (FIG. 5) for positioning and holding the leather heel 30 and its toplift 32 over the active nailing die, or a modified carriage 50a (FIG. 7) for positioning and holding the rubber heel 40 and the associated base lift 42, over said die, upper and lower driver heads 54, 54a (FIGS. 3, 11, 12 and 21) to which are secured primary and secondary nail drivers 56, 56a, fluid pressure means 58 (FIG. 21) for causing the heel seat of the shoe 34, which is positioned on the jack 46 by .a back gage 68, to be depressed against the leather heel 30 in the carriage 500r against the base lift 42, which is spotted to the rubber heel 40 and may be regarded as part of the rubber heel, in the carriage 50a, and fluid pressure means 62 (FIG. 21) for raising the drivers.56, 56a to cause the nails 38 in passages 64, 64a (FIGS. 3, 5 and 12) of the nailing die 48 to be driven into the heel, or for raising the drivers 56 to cause the nails 44 then in the passages 64 of the nailing die 48 of a type used in operating upon rubber work to be driven into the rubber heel 40 and its base lift 42, and into the heel seat of the shoe 34, the pointed ends of the nails being clenched against a heel plate 66 of the last 36. The rubber heel 40 and its base lift 42 will be hereinafter referred to as a composite rubber heel 40.

In the attachment of the leather heel 30 to the shoe '34, the nails 38 are left projecting beyond a toplift receiving face 68 (FIG. 26) of the heel. As will be hereinafter explained, the toplift 32, during a succeeding stage of the cycle of the machine/is attached to the heel 30 by spanking it onto the heel by the application of downward pressure of the heel, which then forms part of the shoe 34, against the toplift mounted in the carriage 50a and supported by the active nailing die 48. The carriage 50 is swung over a flat upper face 70 of the turret 49 and a flat upper face 70a (FIGS. 5 and 12) of the nailing die 48 and, preparatory to carrying out the heel attaching and toplift spanking on operations, is arranged to dwell over said die in active positions in which the heel 30 and the toplift 32 positioned and held in the carriage 50 are positioned respectively over the active nailing die.

The jack 46 is journaled upon a bearing pin 72 (FIGS. 1, 2 and 21) carried by a guide bar 74 which is mounted for movement along a vertical guideway 76 formed in a main frame 78 of the machine. Adjustably mounted upon the lower end of the jack 46 is a spindle plate 80 (FIG. 21) provided with a last pin 82 adapted to be interengaged by a thimble 84 of the last 36 upon which the shoe 34 is mounted. The shoe 34 on the last 36 is manually presented, bottom down and rear end away from the operator, to the jack 46 with the thimble 84 of the last in interengagement with the last pin 82 of the jack, said jack having operatively connected to it by a chain 86 (FIGS. 1 and 2) a slidable mount 88 for the back gage 60, the shoe being swung rearward together with the jack until the rear end of a rand crease 90 (FIGS. 26 and 27) of the shoe engages a lower edge of said gage which serves to position the shoe lengthwise in the machine. The mount 88 of the back gage 60 may be initially adjusted heightwise, widthwise and forwardly and rearwardly of the machine by mechanism well known in the art.

In order to assist the operator in the positioning of a heightwise median plane of the heel seat of the shoe on the jack 46 in a vertical median plane 92 (FIG. 12) of the active nailing die 48 at a heel attaching station 93 (FIGS. 1, 3, 5 and 12) there is provided a breast gag e 94 (FIGS. 1, 18, 19 and 20) a face 96 of one of a pair of T-shaped plates 97 of which is adapted to be engaged by the edge of an outsole 98 (FIG. 20) of the shoe 34 at its break line.

As will be hereinafter described, at the end of the heel attaching operation the active nailing die 48 mounted in the turret 49 is swung beneath a stepped lower plate 100 (FIGS. 3, 4 and 25) of an active tube holder 102 of a battery of tube holders to receive the nails 38 or 44 delivered from a nail distributor 104 generally similar to the nail distributor disclosed in United States Letters Patent No. 1,005,303, granted October 10, 1911, on an application filed in the name of Joseph H. Pope and improved as disclosed in United States Letters Patent No. 2,319,797, granted May 25, 1943, on an application filed in the name of Wallace M. Cutler.

The main frame 78 of the machine, which, as above explained, is similar in many respects to the machine disclosed in Patent No. 2,746,046, comprises a table portion 78a (FIGS. 1, 2 and 3), which houses most of the fluid pressure operated means of the machine, and an upstanding portion 78b upon which the jack 46 and operating mechanism therefor are mounted and to which the nail distributor 104 and nail transfer mechanism are secured.

Secured by screws 106 (FIGS. 2, 3, 4 and 6) to the upstanding portion 78b of the main frame 78 of the machine is an upper bearing housing 108 having mounted in it an upper roller bearing 110 (FIG. 4) and secured by screws 112 to the table portion 78a of the main frame is a lower bearing housing 114 having mounted in it a lower roller bearing 116. Secured to a vertical shaft 118 are upper and lower bearing sleeves 120, 122 having angularly disposed faces respectively adapted to engage the roller bearings 110 and 116, the construction and arrangement being such that the shaft is journaled for rotation about a fixed vertical axis 124 and is confined against axial displacement. Threaded onto the upper and lower portions of the shaft 118 and in en forced engagement with the upper bearing sleeves 120,

122 are nuts 115, 119 respectively. The vertical shaft 118 has secured to it by screws 126 a collar 128 having adjustably secured to it a stop screw 130 the purpose of which will be explained later.

Keyed to the vertical shaft 118 and resting on the lower bearing sleeve 122 is a coupling 132 (FIGS. 4 and 8) having tongues 132a (only one shown) which interfit with grooves formed in a bearing sleeve 134. The bearing sleeve 134 has formed integrally therewith a radially projecting lug 117 (FIGS. 4, 8, 9 and into which are threaded stop screws 136, 136a which, when the shaft is rotated counterclockwise and clockwise, as viewed from above, about the axis 124, are adapted to engage respectively stop screws 138, 138a adjustably secured to bosses 140, 148a on the lower bearing housing 114. The bearing sleeve 134 has formed on it a pair of spaced bosses 142 provided with bores in which a bearing pin 144 is secured, and journaled on said pin is a latch 146 which is normally urged counterclockwise, as viewed in FIG. 4, by a spring 148 (FIGS. 9 and 10). As will appear later, when the stop screw 136:: is in engagement with the stop screw 138a the active nailing die 48 is at the heel attaching station 93 and accordingly the machine is ready to start through its cycle. In order to insure that the machine shall not be operated when the active nailing die 48 is not at the heel attaching station 93 the lug 117 has adjustably secured to it a striker 121 (FIGS. 4, 8, 9 and 24) which, when the turret has been moved to its rest position, depresses a plunger 123 of a switch M1 which is carried by the boss 140a of the lower bearing housing 114 across terminals of this switch. When the turret 48 is swung out of the above position to receive a load of nails the striker 121 moves out of engagement with the plunger 123 and the switch is opened by spring action, thus cutting off the power for operating the machine, as will be explained later.

The bearing sleeve 134 has an upstanding portion 134a (FIGS. 8 and 10) an inner cylindrical face of which engages the shaft 118 and mounted on a wear plate 125 carried by the bearing sleeve is the turret 49 which has a depending apron 49a slidingly engaging the outer cylindrical periphery of the upstanding portion of the bearing sleeve. Adjustably secured to the depending apron 49a of the turret 49 are circumferentially spaced lugs 152 each having a notch 154 any one of which, upon rotating the turret, may be moved selectively into a position for receiving an arm of the latch 146. With the above construction it will be clear that the turret 49 may be released from the shaft 118 by withdrawing the latch 146 from the notch 154 of one of the lugs 152 and may be secured to the shaft by engaging the latch 146 in any one of the four notches which may be considered as being formed in the turret.

The turret 49 is preferably made of aluminum and has formed in it four recesses 156 (FIGS. 8 and 12) each having parallel notches 158 respectively formed in its opposite sides. The recesses 156 are adapted to receive interchangeably one of a plurality of nailing dies 48 having passages 64, 64a of different nailing patterns, the inner ends of each of the nailing dies engaging a stop screw 168 (FIG. 8) threaded into the inner wall of the recess and the outer wall of the nailing die being substantially flush with the periphery of the turret 49. Each of the nailing dies 48 is efiectively held in its operating position in the associated recess 156 of the turret by a latch bar 162 (FIGS. 2, 3, 4 and 8) which is journaled on a screw 164 secured to the turret and has a hook portion attached to another screw 166 threaded into the turret. A screw 168 threaded into the latch may be used to force the nailing die 48 against the stop screw 160 in the end wall of the recess.

During the heel attaching operation substantial pressure is applied against the active nailing die 48 of the turret 49 and in order to insure against any deflection of the turret at this time the periphery of the turret has 8 secured to it four circumferentially spaced thrust plates 170 (FIGS. 2 and 3) which, when the turret is in its heel attaching position, engage respectively upstanding platforms 172 secured to the table portion 78a of the main frame.

Secured to and depending from the turret 49 at opposite sides of the recesses 156 respectively are guide rods 174 on which is slidingly mounted a yoke 176, said yoke by reason of its weight normally resting upon clamp collars 178 (FIGS. 3, 4 and 12) secured to the rods. Slidingly mounted in bores 180 at the lower ends of the guide rods 174 are spring-pressed pins 182 the lower ends of which bear on lateral flanges 176a of the yoke 176 and which normally serve to maintain the associated yoke in its lowered rest position against the clamp collars 178 The yoke 176 has formed in it a pair of channels 184 for receiving the upper driver head 54 having secured to it the drivers 56 upper ends of which extend into the passages 64 of the nailing die 48. The yoke 176 has also formed in it a vertical bore 188 in which is mounted for vertical sliding movement a plunger 190 to the upper end of which is secured a driver head carrier 192 lateral sides of said carrier being in engagement with the inner side walls 194 of the yoke. The carrier 192 has formed in it a cavity 196 for receiving the lower driver head 54a to which the drivers 56a are secured. The plunger 190 is provided with a circumferential groove 195 (FIG. 11) for receiving a ball check 197 when the plunger 190 has been depressed to a predetermined position. This insures against the plunger 190 contacting any other parts of the machine during the indexing of the turret 49.

The nailing die 48, the upper and lower driving heads 54, 54a, and the drivers 56, 56a are assembled as a unit in the recess 156 of the turret 49, in the channel 184 of the yoke 176, and in the cavity 196 of the carrier 192, the assembly being secured in an operating position in the turret by the use of the latch bar 162.

As above explained, any one of the nailing dies 48 of the turret 49 together with its associated nail driving mechanism above described may be secured to the shaft 118 in an active position when the machine is in its rest position, by manually moving the latch 146 to a position in which it is withdrawn from the notch 154 formed in one of the lugs 152 of the turret and rotating the turret on the shaft until the selected nailing die and its associated driving mechanism are arranged at the heel attaching station 93 and beneath the jack 46.

Secured to the lower end of the shaft 118 is a crank 299 (FIGS. 4 and 21) pivotally connected to a rod portion 202 of a piston 204 slidingly mounted in a cylinder 206 which is pivotally mounted at 211 on the main frame 78 and has faces 208, 210 open to lines 212, 214 leading to a valve 216 hereinafter described. As above explained, rotation of the shaft 118 and accordingly the turret 49 secured to it, in counterclockwise and clockwise directions, as viewed from above, is limited by the engagement of the screws 136, 136a carried by the radially projecting lug 117 of the bearing sleeve 134 with screws 138, 138a carried by the bosses 140, 140a of the lower bearing housing 114, the stopping positions of the turret in opposite directions being varied by initially adjusting the screws 138, 138a in said bosses.

Rotatably mounted upon the shaft 118 between the turret 49 and the collar 128 is a sleeve 218 having a lower flange 218a which fits slidingly in a circular rabbet 220 formed in the upper face of the turret, said sleeve, as will be explained later, having attached to it the carriage 50 or 50a in accordance with whether leather heels 30 and their toplifts 32 or composite rubber heels 40 are being attached to the shoe. In operating upon leather work the carriage 58, during the first part or stage of the cycle of the machine in which the heel 30 is attached by nails 38 to the shoe 34, is in its full line position shown in FIG. 5 with the leather heel 30 resting beneath the jack 46, and during the last part or stage of said cycle when the toplift 32 is spanked onto the heel, the carriage is in its dash-line position beneath the jack.

The carriage 50 comprises a base plate 222 (FIGS. 3 and 5 provided with a slot 224 in which fits a lug 226 secured to the lower flange 2180 of the sleeve 218, said base plate being secured to the flange of the collar by a pair of screws 22% which pass through openings in the base plate and are threaded into said base flange. The carriage 50 may be described as comprising a heel receiving unit 236 and a toplift receiving unit 232, rear ends of the heel 30 and the toplift 32 positioned in the carriage being in engagement with rear gages 234, 234a which may be initially adjusted into different positions forward and rearward of the carriage to accommodate heels of different sizes. The heel 3t and the toplift 32 are held against the rear gages 234, 234a respectively by L-shaped breast gages 236, 236a which are slidably mounted in guideways 238, 238a. The operator moves the breast gages 236, 236a forward by forcing the breasts of the heel 30 and the toplift 32 against said breast gages in order to allow the heel and the toplift to be placed in the carriage 50 and releases them, springs 240, 240a forcing the breast gages rearward until the heel and the toplift have been forced respectively against the rear gages 234, 234a. The sleeve 218 has secured to it by screws 24-2 (FIGS. 3, 5. and 6) an arm 244 having a rectilinear guide channel 246 for receiving 21 depending flange of an abutment block 248, said block being adjustably secured to the arm by a pair of screws 250 which are threaded into the arm and pass through slots in the block. The abutment block 248 may be adjusted to different operating positions lengthwise of the channel 246, after loosening the screws 250, by the use of a thumb screw 252 which is rotatably mounted in a notch of the block and is threaded into the arm.

When the carriage 50 is in its heel attaching position beneath the jack 46 and a heightwise longitudinal median plane of the heel 30 is coincident with the plane 92 (FIG. 12) through the nailing die 48, the block 248 is in engagement with a pin or detent 254 which is constantly urged to a lowered position by a spring 256 the arm 244 and to a screw 260 threaded into the main frame until a stop screw 262 threaded into the arm engages a stop screw 264 threaded into an extension of the bearing housing Hi8. Just before the arm 244 reaches the limit of its clockwise movement (FIG. 5) a screw 266 secured to the arm engages the rear wall of a slot 268 of a link 2276 pivoted to a plunger of a fluid pressure check valve 272. As the arm 244 is swung clockw se (FIG. 5) a striker screw 274 adjustably secured to a plate 276 secured to the arm enga es a plunger 27% of a switchM9 (FIGS. 1 and 4) causing, through means hereinafter described, a solenoid S8 (FIG. 21) of a valve 280 to be energized to cause the desired amount of augmented pressure, which is controlled by a relief valve 282 and is additional to the initial or primary pressure,

to be applied downwardly to the jack 45 so that nails 38 projecting from the heel 30 may be quickly and effectively spanked onto the toplift 32 supported on the carriage 50 when a treadle 284 (FIGS. 1 and 23) of the 'machine is depressed during the last stage of the cycle of the machine to effect the spanking on of the toplift. The carriage 51 is returned from its spanking on position to its position shown in FIG. 5 in response to "swinging or indexing of the turret 49 to a position in which the active nailing die 48 receives nails from passages 306 in the lower plate 108 of the active tube holder .102 at a nail receiving station. The active tubeholder may be defined as a nail delivering member or a fixed nail loader. I

The collar 128, as above explained, has adjustably secured to it the screw 130 and the sleeve 218 has secured to and extending rearwardly from it a block 286. When the carriage 50 is in its spanking dash-line position (FIG. 5) the block 286 of the sleeve 218 is in close proximity to the screw 130 of the collar 128, clockwise movement of the carriage 50, as viewed from above, at this time being limited by the engagement of the stop screw 262 mounted on the am 244 with the stop screw 264 on the bearing housing 108. When the drive shaft 118 has been rotated counterclockwise (FIG. 5) sufiiciently to move the turret 49 so that its active nailing die 48 is positioned beneath the lower plate of the active tube holder 102, the screw operating through the block 2.36 has rotated the carriage 50 sufficiently to move the bLlOCk 248 of the am 244 forward of the pin 254. As will be explained later, the solenoid S5 is de-energized while the active nailing die 48 of the turret 49 is being moved toward the tube holder 102, the pin 254 operatively connected to said solenoid being depressed by the spring 256 against'the upper face of the abutment block 248 and being moved by said spring to its lowered position shown in FIG. 6 after the block has run off the pin 254. It will thus be clear that the carriage 50 is held in its heel attaching. position shown in FIG. 5 by the pin 254 when the turret 49 is indexed back to its rest position in which the active nailing die 48 is arrangedbeneath the jack 46 and until such time as it is desired to move the carriage to its dash-line position preparatory to spanking" on the toplift 32.

Nail transfer The upper bearing housing 108 has a bore 288 (FIG. 25) for receiving a bearing screw 290 having a shoulder which is normally held in forced engagement with said bearing housing by a nut 292, 'a supporting platform 294 having an upstanding sleeve portion being journaled on the bearing screw between the bearing housing and a head 296 of said screw. Mounted on the bearing screw 290 in a predetermined position is a foot plate 298 provided with passages 300 of a plurality of patterns. Slidingly mounted in a boss of the foot plate 298 is a plunger 302, said plunger being constantly urged downward by a spring 303 and extending beyond the under face of said foot plate. The nut 292 is used to clamp the bearing screw 290 and the foot plate 298 in their operating positions to the bearing housing 108. The supporting platform 294 has formed in it four circular openings 304 for receiving respectively the lower plates 109 of the tube holders 102, said lower plates having the above-mentioned passages 306 of the same patterns respectively as those of the passages 64, 64a of the nailing dies 48 of the turret. Each of the tube holders 102 comprises an upper plate 308 which is provided with passages 310 of the same pattern as the passages 306 of the foot plate 298, and a plurality of tubes 312 which extend into and connect passages of the upper and lower plates of said tube holders.

In order to position the tube holders 102. upon the supporting platform 294 said platform has secured to it studs 314 which register respectively in notches 316 formed in the lower plates 100 of the tube holders 102. The upper plate 308 of'ea'ch of the tube holders 102 is provided with abore 318, the tube holder corresponding to the active nailing die 48 being positioned in its active position beneath the foot plate 298 by swinging, after raising the plunger 302, the platform 294 to move the proper tube holder to its active position beneath the foot plate, said plunger then being released to permit the plunger, acted upon by the spring 303, to engage in the bore 318 of the upper plate of the tube holder and thus to hold the active tube holder and accordingly the platform 294 against movement.

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