US1285135A

US1285135A - Tack-pulling machine.

Info

Publication number: US1285135A
Application number: US18931817A
Authority: US
Inventors: John B Hadaway
Original assignee: United Shoe Machinery Corp
Current assignee: United Shoe Machinery Corp
Priority date: 1917-09-01
Filing date: 1917-09-01
Publication date: 1918-11-19
Anticipated expiration: 1935-11-19

Description

J. B. HADAWAY.

TACK PULLING MACHINE.

APPLICATION FILED SEPT. I, 191 7.

1,285, 1 35. Iatenfed Nov. 19, 1918.

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J. B. HADAWAY.

TACK PULHNG MACHINE.

APzLICAUON FILED SEPT. I. 191 z.

Patented Nov. 19, 1918.

ya: man: Plrnr: EL flnmmna. mum/mun STATES PATENT orrron.

JOHN B. HADAWAY, or swnivirsoor'r; MASSACHUSETTS, Assmnon, BY mnsnn ASSIGN- MENTS, T0 umrnn snon MACHINERY CORPORATION, or rarnnson, NEW JERSEY,

A CORPORATION OF NEW JERSEY.

TACK-PULLING MACHINE.

Specification of Letters Patent.

Application filed September 1 1917. Serial No. 189,318.

To all whom it may concern:

Be it known that I, JOHN B. HAnAwAna citizen of the United States, residing at Swampscott, in the. county of Essex and State of Massachusetts, have invented certain new and useful Improvements in Tack- Pulling Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as'will enable others skilled in the art to which it appertains to make and use the same.

The present inventionrelates to tack pulling, machines and more particularly to machines of. this type employed for removing the side tacks from a lasted boot or shoe.

It is desirable that machines of this type shall operate with certainty and rapidity to remove the tacks which hold the lasted upper in place without tearing or Otherwise damaging the upper of the shoe.

An object ofthe invention is to provide a tack pulling machine having an improved construction and mode of operation which insures the engagement and removal of the tack without tearing the upper. A further object of the invention is to provide improved mechanism for actuating the tack pulling jaws'in a manner topermit the release of the shoe upperif the latter is accidentally caught between the jaws.

W'th the above objects in view the various features of the invention consist in certain novel features of construction, combinations and arrangementsofparts hereinafter described and claimed, the advantages of whichwill be obviousto thoseskilled in the art from the following description.

" In the preferred form of the invention shown in ,the' accompanying drawings,

Figure '1' represents a side elevation of a tack pulling machine embodying the'features ofthe invention; Fig. 2 is a plan view of the machine with the casing cut away to showthe mechanism for actuating the tack pulling jaws; Fig. 3 is a detail illustrating a port on of the construction for actuating the tack pulling j aws ;'Fig. 4 is a detail illustrating across section of the jaws and co-. operating work supports taken upon the line 4-4 of Fig. 1; and Fig. 5 is a partially diagrammatic view illustrating the paths in which the two tack pulling jaws are moved.

According to the present invention the tack is removed by a pair of coiiperating jaws which are actuated in a manner to insure the engagement and removal of the tack without defacing or otherwise damaging the upper of the shoe in any manner. The mechanism for actuating the tack pulling jaws is simple in construction and efficient in itsmode of operation, permitting the jaws to be operated at the highest rate of speed consistent with the proper engagement of the tacks.

In the simplest and most eflicient form of the invention which has yet been devised the jaws are secured upon the outer ends of two supporting levers which are pivotally supported upon a rocker arm between their ends. The rocker arm is oscillated to move the jaws bodily toward and from the shoe through a crank motion and the jaw supporting, levers are oscillated about the pivotal connection with the rocker arm to open and close the jaws through a pair of cams disposed upon opposite sides, of the crank and connected directly to the ends of i the levers. y

In the illustrated embodiment'of the invention apair of cooperating tack pulling jaws 10 and 11 are secured, respectively, to jaw supporting levers 13 and 1 1 which are pivoted at 15 to a rocker arm 16 depending from anoscillatoryshaft 17. journaled in 0ppositely disposed bearings 18 formed in the frame of the machine. As shown clearly in Fig. 3 the levers 13 and 14 are loosely fulcrumed upon a shaft 19 secured at'i'ts opposite ends in the two parts 20fand 21 of the rocker arm 16. This construction causes the levers to be moved bodily with the rocker arm and at thesame time permits an independent oscillation of the levers about the pivotal connection with the rocker arm. The rocker arm 16, is actuated by a connectin'grod 23 throughan extension of the members 20 and 21 extending beyond the shaft 17 and connected with the rod 23 through movements to engage with and release a tack are imparted by a pair of suitably designed cams formed in the adjacent 'faces of

cam disks

28 and 29 which are secured to the shaft 26 upon opposite sides of tl1e\eccentric and are connected to the levers 13 and 14 through cam rolls 30 and 31 journaled upon the ends of the levers. It may be observed that this mechanism forms an extremely simple and compact construction for imparting the proper movements to the tack pulling jaws. V

The tacks are located in operative relation to the pulling jaws by adjustable work supports 33 and 34 which cooperate to form a tack guiding throat for properly locating the tack between the pulling jaws, the movement of the tack across the aws being limited by a transverse abutment 35. In addition to acting as work supports for properly locating the tack with respect to the pulling jaws the members and 3% also serve as guards to hold down the shoe upper upon opposite sides of the line oftacks.

In order to augment the protection .aiiord ed the shoe upper by the guards and to insure against any liability of the upper being defaced or injured by the pulling jaws, the present mechanism is designed to cause the release of the upper by the jaws should the latteraccidentally engage the upper between them. To this end a movement of separation is imparted to the jaws after the engagement and partial removal of the tack, which is sufhcient to release the upper from between the jaws it the upper is accidentally engaged thereby. 1n machines of this character empl'oyed fort-h removal of projecting lasting tacks'the jaws ordinarily grip the shank of the tack below the head and when separated to release the upper the jaws slide freely along the shank and subsequently engage with the head on a different point upon the shank to complete the removal of the tack from the shoe. 1n the specificembodiment of the invention shown in the drawings the movement it-separation is imparted to only one of the jaws. As shown clearly, in Fig. 5 the path of the tack pulling movement imparted to one of the jaws is recessed to move the jaw away fromthe cobperatin'g jaw sufficiently to permit the release of the upper if the latter is engaged therebetween; This recess 18 located between the ends of the path so that the two j aws subsequently close upon the tack to complete the removal.

In order to facilitate the engagement of certain of the lasting tacks which may be 33 is secured to the lower end of a slide 910 supported in inclined ways 41 formed in the frame and actuated by a toggle consisting of a lever 43 fulcrumed upon theframe at 4st and a short link 45 connecting the slide 40 and the adjacent end of the lever 4E3. The opposite free end of the lever 43 is connected to a treadle rod 46 which is normally elevated by a spring (not shown). The ele vation of the treadle rod normally maintains the work support in the position shown in Fig. 1 of the drawings. The upward movement of the treadle rod 16 normally "moves thework support 33 into the position shown in Fig. 1, which position is determined by engagement of the adjacent faces of lugs l7 and 48, formed, respectively, upon the lever 43 and the link 45. This construction serves to unyieldingly maintain the, work support in the position shown in Fig. 1, the depression of the treadle rod 4E6 breaking the toggle and serving to elevate the work support sufiiciently to permit rocking the shoe about the stationary work support 34.

The driving shaft 26 is provided. with the usual tight and loose pulleys 50 and 51 which are selectively rotated through a driving belt 52 controlled by a belt shifting cage 53 supported by a bracket 5asecured to one claims, and may be changed or modified without departing from the broader features of the invention.

The invention having been described, what is claimed is:

1. A tack pulling machine, having in combination, a lockerarm, a pair of levers tulcrumed upon the rocker. arm, a tackpulling jaw supported upon the end of each, lever, a rotary cam connected to the opposite end of each lever for oscillating the lever about its fulcrum, and a crank actuating mechanism for oscillating the rockerarm.

2. A tack pulling machine, having in combination, a rockerarm, a pair ofcrossed le-' vers fulcrumed intermediate their ends upon the rocker arm, tack pulling jaws supported upon the adjacent ends of the levers, a

rotary cam operatively connected to the op posite end of each lever for oscillatingthe levers to open and close the jaws,,and means for oscillating the rocker arm 3. A tack pulling machine, having in combination, a rocker arm, a pair of levers fulcrumed upon the free end of the rockerarm,

tack pulling jaws supported upon adjacent ends of the levers,-mechanism for oscillating the levers/to open andclose the jaws, anex tension projecting from the, rocker arm, a rotary crank and a connecting rod secured-at its opposite ends to the crank and to the extension for causing the latter to be actuated by the crank. 4:. A tack pulling machine, having in combination, a rocker arm, a pair of levers fulcrumed between their ends upon the rocker arm, tack pulling 'aws supported upon the adjacent ends of t e levers, a shaft, a pair of cam disks secured to the shaft, connections between the inner face of each cam disk and one of the levers for oscillating the levers, and crank actuated mechanism supported upon the shaft between the cam disks and connected with the rocker arm. n

5. A tack pulling machine, comprising a tack pulling jaw, mechanism for actuating the jaw to engage and remove the tack, a pair of work supports engaging with the shoe upon opposite sides of the tack, and means for removing one of the supports from engagement with the shoe to permit thelatter to be rocked about the cooperating suport. p 6. A tack pulling machine, comprising a tack pulling jaw, mechanism for actuating the jaw, a pair of work supports engaging with the shoe upon opposite sides of the tack, a slide to which one of the supports is secured and means under the control of the operator for actuating the slide to withdraw the support from engagement with the shoe.

7. A tack pulling machine, comprising a the jaw, a pair of work supports engaging with the shoe upon opposite sides of the tack, means for locking one of the work supports in operative position, and means under the control of the operator for Withdrawing the work support into an inoperative position when desired.

8. A tack pulling machine, having in combination, a pair of tack pulling jaws, and actuating mechanism for the jaws constructed and arranged to move the latter from the point of engagement with the tack in paths so shaped that the jaws first grip and partially remove the tack, next release the tack while continuing to move lengthwise of the tack, and finally grip the tack and complete the removal thereof from the shoe.

9. A tack pulling machine, having in com bination, a pair of tack pulling jaws, and actuating mechanism for the jaws constructed and arranged to move the latter from the point of engagement with the tack in a direction to pull the tack and to impart a relative movement of separation to the jaws prior to the completion of the tack pulling movement suflicient to permit the release of the upper from between the jaws.

JOHN B. HADAWAY.

Copies of this patent may be obtained for five cents each, by addressing, the Commissioner of Patent Washington, D. G.