US1943429A - Fastening-inserting machine - Google Patents

Description

Jan. 16, 1934. GQDDU FASTENING INSERTING MACHINE 2 Sheets-Sheet l Filed Oct. 8, 1931 F i gl.

Jan. 16, 1934. G, GODDU 1,943,429

FASTENING INSERTING MACHINE Filed Oct. 8. 1951 2 Sheets-Sheet 2 Patented Jan. 16, 1934il UNITED STATES PATENT OFFICE FASTEN IN G-IN SERTING MACHINE Appiication October 8, 1931.

Claims.

This invention relates to fastening-inserting machines and is illustrated herein as embodied in a machine of the type disclosed in United States Letters Patent No. 1,849,253, granted March 15,

5 1932, upon an application nled in the name of Fred N. Lachapelle.

Machines of the type disclosed in Patent No. 1,849,253 referred to above are provided with an awl arranged to form fastening-receiving holes l@ in a work piece presented thereto, and to feed the work to bring each fastening-receiving hole formed therein, into fastening receiving position. In such machines the awl is yieldingly connected to its operating means by mechanism which permits the awl to come to rest when it encounters an excessive resistance in its workpenetrating movement as when it strikes an impenetrable member back of the Work while the means for operating the awl continues its operation. A work support is usually provided arranged to press the Work, with considerable force, against a presser plate or work abutment during the work-penetrating and fasteninginserting operations and means is also usually provided for relieving the pressure of the work support during the feeding movement of the work.

In the use of the machine of the application referred to above, no diiiculty has been experienced in performing the heel-seat nailing or pegging operation while the shoe is upon the last, In the manufacture of certain kinds of shoes, however, the last is removed from the shoe before the outsole is attached to the shank and forepart of the shoe. In such cases the heel-seat nailing or pegging operation is commonly performed with the last removed from the shoe.

In performing the heel-seat nailing or peggmg operation cif the last, it has been found that, due o to the yielding connection between the awl and its operating means, there is a tendency for the awl to follow the work support as the Work support is lowered to relieve pressure on the work and to drag across the upper surface of the work support as the awl is moved transversely of the machine to feed the work. This sets up considerable friction between the end of the awl and the upper surface of the work support which interferes with the feeding movement of the awl and as a result sometimes the fastening-receiving holes formed in the work by the awl are not moved into alignment with the fastening-inserting instrumentalities of the machine.

It is an object of the present invention to provide a fastening-inserting machine so organized Serial No. 567,658

that the above-mentioned diiiculty will be obviated when performing off-the-last work. In the illustrated machine and according to an important feature of the invention, means is provided for imparting a positive movement of retraction to the awl immediately after the awl has completed its work-penetrating movement and prior to its work-feeding movement. Thus, the awl is prevented from dragging across the upper surface of the work support as it is moved transversely of the machine to bring each fasteningreceiving hole formed in the work into alignment with the fastening-inserting instrumentalities of the machine. Preferably and as illustrated, the means for withdrawing the awl from the work is constructed and arranged to impart a movement of retraction to the awl the length of which is less than the thickness of the work as measured by the awl during its work-penetrating movement so that the awl is only partially withdrawn from the work regardless of the thickness of the work.

With the above and other objects and features in view, the invention will now be described in connection With the accompanying drawings and will be pointed out in the claims.

In the drawings,

Fig. 1 is a side elevation of the head of a fastening-inserting machine embodying the present invention and showing a cross-section of a shoe mounted upon a work support and presented to the machine as for the performance of a heelseat nailing or pegging operation;

Fig. 2 is a front elevation of the head of the machine shown in Fig. l;

Fig. 3 is a side elevation looking in the opposite direction of the head of the machine shown in Fig. 1;

Fig. 4 is a perspective view of means for severing a fastening from a strip of fastening material and presenting the fastening to the operation of a fastening-inserting driver;

Fig. 5 is a side elevation of the awl-operating means and illustrates the position of the parts after the awl has been partially withdrawn from the work; and

Fig. 6 is a side view on an enlarged scale of parts shown in Fig. 5 showing the position of the awl relatively to the Work support just prior to the feeding movement of the awl.

The illustrated machine is of the general type disclosed in United States Letters Patent No. 1,030,775, granted June 25, 1912, upon an application filed in the name of George Goddu, though organized to insert fiber pegs severed from a strip of fastening material such as paper twine instead of loose nails. r1he machine may be advantageously equipped with a work support of the character disclosed in said Patent No. 1,030,775, the pressure-relieving mechanism being modified, if desired, as shown in Figs. 23 and 24 of United States Letters Patent No. 1,686,808, granted October 9, 1928, upon an application led in the names of George Goddu and T L. MacKenzie. Reference may be had to these patents for a full disclosure of such parts of the machine as it is unnecessary to illustrate herein. The illustrated machine is provided with a column carrying a head 12 on which are mounted the fasteninginserting instrumentalities of the machine. The column 10 also carries a work support 14 arranged to support a work piece such as a shoe 16 with its sole 20 in engagement with a presser plate 22 carried by the head 12 of the machine. The shoe may be positioned relatively to the fasteninginserting instrumentalities of the machine by a gage 24 which may take any suitable form also carried by the head 12 of the machine. Mounted in suitable bearings, carried by the head 12 of the machine is a cam shaft 30, Figs. 1 and 3, carrying a cam member 32 provided with a series of cam grooves and surfaces arranged to operate the moving parts of the machine. Loose upon the cam shaft near the rear end thereof, is a pulley 34 driven from any suitable source of power by belt 36. Slidably mounted on the shaft 30 is a clutch member 38 having a clutch surface 40 arranged for movement into and out of driving relation with a clutch surface 42 formed on the pulley 34. The clutch member 38 is also provided with a brake surface 44 arranged for movement into and out of braking relation with a brake surface 45 carried by the head 12 of the machine. A spring surrounding the shaft 30 tends to move the clutch member 38 into driving relation with the pulley 34 and permits the clutch member 38 to be moved away from the pulley 34 and into engagement with the brake surface 46 by power transmitted from a cam surface 52 with which the cani member 32 is provided when the treadle rod 54 is depressed by a spring 55 upon the releasing of a treadle connected to the lower end of the rod 54. For a more complete disclosure of this mechanism which forms no part of the present invention, reference may be had to Patent No. 1,030,775 referred to above. The machine is provided with a driver bar mounted for reciprocating movement in vertical ways carried by the head 12 of the machine adjacent to the forward end of the shaft 30. Clamped to the lower end of the driver bar 60 is a driver 62. The driver bar 60 is provided with a rack 64 meshing with a gear segment 66 formed upon the end of the forwardly extending arm of a bell-crank lever 68 fulcrumed at 70 to the head 12 of the machine and having a depending arrn carrying a roll positioned in the cam track 72 formed in the member 32.

An awl-bar carrier 80, best shown in Fig. 2, is mounted for horizontal sliding movement at the front of the machine, and mounted for vertical sliding movement in ways formed in the awl-bar carrier is an awl bar 82 carrying at its lower end an awl 84. The rear surface of the awl bar 82 is provided with a rack 86 meshing with a gear segment 88 formed upon the forward end of a lever 90 fulcnumed at 92 to the head l2 of the machine 3. The awl-bar carrier 80 is reciprocated transversely of the machine by a lever fulcrumed to the head 12 of the machine and carrying a roll positioned in a cam groove formed in the rear surface of a cam disk 102 secured to the forward end of the shaft 30.

The lever 90 is provided with a rearwardly extending arm 104 yieldingly and adjustably connected to a bell-crank lever 106 pivoted at 108 to the head 12 of the machine and carrying a cam roll positioned in a cam track 110 formed in the cam member 32, Figs. 3 and 5. Thus the `awl 84 serves both to form fastening-receiving holes in a work piece presented thereto and to feed the work piece toward and past `the driver 62. In order to permit the awl 84 to come to rest when it hits the metal horn tip of the work support 14 the connection between the arm 104 of the lever 90 and the bell-crank lever 106 includes a spring 112 stiff enough to transmit sufoient power `to the awl 84 to drive the awl into and through the material of a shoe bottom without substantial yielding but sufficiently yielding so that it is compressed and permits the awl to come to rest when it strikes the metal horn tip of the work support 14 even though the lever 106 has not finished its rocking movement. The spring 112 surrounds a sleeve 114 pivoted at its lower end to the arm 104 of the lever 90 and carrying at its upper end a nut 116 which serves as an abutment for the upper end of tho spring 112. The lower end of the spring 112 abuts against a colla-r 118 slidably mounted on the sleeve 114 and carried at the lower end of a pair of parallel bars 120 pivotally connected at their upper ends to a stud 122 adjus-tabiy mounted in a slideway 124 formed in the forwardly extending arm of the bell-crank lever 106. rihe lever 106 may be provided with a scale 126, Fig. 3, to indicafte the depth of the fastening-receiving holes formed in the-work by the full stroke of the awl at the various positions of adjustment of the stud 122. Clamped to the nut 116, is a bearing member 128 engaging machined surfaces 130 formed upon the parallel bars 120 and serving to prevent relative displacement of the members 114 and 120.

The ber-fastening material 140, from which the pegs inserted by the machine are severed, is carried by a reel 142 mounted upon a bracket 144 secured to the head 12 of the machine. The fastening material is engaged by a feed dog 146, Fig. 2, and by a spring-pressed-holding dog 148 designed to prevent retrograde movement of the fastening material after which it enters a passageway 150, the lower end of which is in alignment with the driver passage of a forwardly and rearwardly reciprocating throat member 152 when the throat member is in its rearmost position. Forward movement of the throat l member 152 thus serves to sever a peg from the fastening material 140. The throat member 152 is carried by the forward end of a bar 154, Fig. 1, mounted for forward and rearward movement in ways carried by the head 12 of the 1,1.:

machine and provided near its rear end with a rack 156 engaging a gear segment 158 formed at the lower end of a lever 160 fulcrumed at 162 to the head 12 of the machine and having an upwardly extending arm carrying a roll positioned in a cam groove 164 formed in the cam member 32.

The feed dog 146, Fig. 2, is pivoted to the ends of a pair of parallel links 166 pivoted at 168 to a pair of ears depending from a block 170 formed at the lower end of a tubular member 172 which forms a guide for the fastening material 140 and is mounted for reciprocating movement lengthwise of the strip of fastening material 140 in a slideway formed in a bracket 174 secured to the head 12 of the machine. The extent of the reciprocation of the block 170 will determine the length of fastening material fed.

Accordingly, the block 170 is pivoted to a block 176 mounted in slideways formed at the forward end of a level' 178, Fig. 1, pivoted at 180 to the head 12 of the machine and having a rearwardly and upwardly extending arm pivoted at 182 to the forward end of a link 184 the rear end of which is pivotally connected to a bolt 186 adjustably mounted in an arcuate slot 188 formed in the upwardly extending arm 190 of a bell-crank lever 192 pivoted at 193 to the head 12 of the machine. The arm 190 of the bell-crank lever 192 is provided with a roll positioned in a cam track 194 formed in the cam member 32. A nut 198 is threaded upon the outer end of the bolt 186 and engages a washer 200 bearing against the outer surface of the rear end of the link 184. Thus the stud 186 is adjustably secured to the bell-crank lever 192.

The radius of curvature of the slot 188 is equal to the length of the link 184 and since the rocking movement of the lever 192 is uniform in each cycle of operation of the machine, the extent of rocking movement imparted to the lever 178 may be varied by adjusting the position of the stud 186 relatively to the pivot 193 of the lever 192. Thus the extent of the reciprocation of the block 170 may be varied by adjustment of the connection of link 184 to the arm 190 of the bell-crank lever 192. As illustrated, the lever 192 is effective also to transmit the pressure-relieving movement to the work support 14 which facilitates the feeding of the work, that movement being transmitted through a rod 196 connected at its upper end to a rearwardly extending arm 195 of the lever 192 and at its lower end to mechanism of the character disclosed in Letters Patent of the United States No. 1,587,848 modified, if desired,

4.0.! as shown in Figs. 23 and 24 of Letters Patent of the United States No. 1,686,808.

In order to prevent the awl from dragging across the end of the horn as the awl is moved transversely of the machine with its carrier s to move each fastening-receiving hole formed in the work into alignment with the driver 62, means is provided, which will now be described, for partially withdrawing the awl from the work prior to the feeding movement thereof.

As illustrated in Fig. 3 the awl 84 is yieldingly connected to its reciprocating means through a stiiic compression spring 112, which is arranged to yield to permit the awl to come to rest when it encounters an excessive resistance in its workpenetrating movement as when it strikes the metal horn tip of the work support 14. Since the full stroke of the awl 84 may be varied in accordance with the thickness of the work to be operated upon by adjusting the position, in the slot 124,

. of the bolt 122 relatively to the pivot 108 of the lever 106 it will be readily seen that the spring 112 may be given a substantially uniform movement of compression in each cycle of operation of the machine after the awl 84 strikes the metal horn tip of the work support 14 regardless of the lmovement in a counterclockwise direction as -viewed in Figs. 8 and 5 is imparted to the bellcrank lever 106. This movement of the lever 106 in a counterclockwise direction rst returns the spring 112 to its initial position at which time the collar 118 engages a ange 202 formed on the sleeve 114, after which, during continued counterclockwise movement of the lever 106, the lever is swung in a clockwise direction thereby elevating the awl bar 82 and partially withdrawing the awl from the work, Fig. 6.- The awl 84 is then moved transversely of the machine to bring the fastening-receiving hole formed in the work into fastening-receiving position after which the lever 106 is returned to its initial position thereby withdrawing the awl from the work.

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

1. A machine for inserting fastenings having, in combination, an awl arranged for work penetrating and work feeding movements, means for operating the awl including a connection arranged to yield when the awl strikes an excessive resistance, and means for imparting to the awl 'a positive movement of retraction between its work penetrating and feeding movements.

2. A machine for inserting fastenings having, in combination, an awl arranged for work penetrating and work feeding movements, means for recpirocating the awl including a spring connection arranged to be partially compressed whenthe awl penetrates the work, and means for partially withdrawing the awl from the work between its work penetrating and feeding movements.

3. A machine for inserting fastenings having, in combination, a work support, an awl, means for causing the awl to penetrate the bottom of a shoe mounted on the work support and then to come to rest when the awl strikes the work support, said means being constructed and arranged to impart a movement of retraction to the awl the length of which is less than the thickness of the work asmeasured by the awl during its work penetrating movement, connections between said awl operating means and said awl arranged to yield when the awl strikes the work support, and means for moving the awl transversely of the work support to bring the hole formed in the work into fastening-receiving position.

4. A fastening-inserting machine having an awl, means for operating the awl to form fastening-receiving holes in a work piece presented thereto and to feed the work piece to bring the hole formed therein into fastening-inserting position, said means being constructed and arranged partially to withdraw the awl from the work between its work penetrating and feeding movements and including a yieldable connection between the awl and operating means, and means for inserting fastenings into the holes formed in s the work by the awl.

5. A fastening-inserting machine having an awl, means for operating the awl to form fastening-receiving holes in a work piece presented thereto and to feed the work piece to bring the fastening-receiving hole formed therein into fastening-inserting position, said means including a connection arranged to yield when the awl penetrates the work and being constructed and arranged to impart a positive movement of retraction to the awl after the yieldable connection has been returned to normal condition between its work penetrating and feeding movements the length of which is less than the entire thickness of the work piece, and means for inserting fastenings in the holes formed in the Work by the aWl.

6. A fastening-inserting machine having an awl, means for operating the awl to form fastening-receiving holes in a Work piece presented thereto and to feed the Work piece to bring the hole formed therein into fastening-receiving position, said means including a spring connection arranged to yield When the awl strikes an excessive resistance and being constructed and arranged to impart a positive movement of retraction to the awl just prior to the Work-feeding movement of the awl the length of said movement of retraction being less than the length of the Work-penetrating' movement of the aWl, and means for inserting fastenings in the holes formed in the work by the awl.

7. A machine for inserting fastenings having, in combination, an awl, means to cause the awl to pierce partially to be Withdrawn and then to feed the Work piece in each cycle of operation of the machine, a single means for severing a fastening from a strip of fastening material and for feeding the fastening into alignment with the hole formed the work, and means for inserting the aligned fastening into the Work.

8. A fastening-inserting machine having, in combination, fastening-inserting means, an awl, means for moving the awi in one direction through a path the length of which is controlled by the thickness of the Work piece presented thereto and in the oppcsite direction through a path the length of which is less than the thickness of the Work piece, and means for thereafter moving the awl transversely of the machine to feed the Work.

9. A fastening-inserting machine having, in combination, fastening-inserting means, an awl, a cam, connections between the aWl and the cam constructed and arranged forcibly to thrust the awl through the material of a Work piece presented thereto but to permit the awl to come to rest in each cycle of operation when it strikes an impenetrable member back of the Work piece and later in the cycle partially to withdraw the awl from the work, and means for thereafter moving the awl transversely of the machine to feed the Work.

10. A fastening-inserting machine having, in combination, fastening-inserting instrumentalities, an awl, a presser plate, a work-support movable toward and from the presser plate and arranged to press the Work against the presser plate during the Work-penetrating movement of the awl and during the fastening-inserting operation, means for reciprocating the awl constructed and arranged to move the awl toward the Work support to form fastening-receiving holes in a work piece supported thereby and to come to rest in engagement with the work support and then to move the awl away from said Work support an amount less than the thickness of the Work piece, and means thereafter for moving the awl transversely of the machine to bring the fasteningreceiving hole formed in the Work into fasteningreceiving position.

GEORGE GODDU.

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