US2152735A - Sole fitting machine - Google Patents

Description

April 1939- T. GULBRANDSEN 2,152,735

SOLE FITTING MACHINE Filed Jan. 10, 1938 Patented Apr. 4, 1939 UNITED STATES PATENT OFFECE SOLE FITTING MACHINE Application January 10, 1938, Serial No. 184,179

Claims.

This invention relates to sole fitting machines and is herein illustrated and described as embodied in a channeling machine of the type disclosed in United States Letters Patent No.

5 2,015,064, granted September 24, 1935, upon the application of Frederic E. Bertrand. The machine disclosed in that patent is provided with a pair of channeling knives which are normally held in operating position by springs. The work is supported upon a work table and a treadle-operated mechanism is provided for raising the knives out of operating position and also for lowering the work table to enable the operator to insert and replace a sole.

It is an object of the present invention to provide improved means for moving the operating knife of a sole-fitting machine out of its normal or operating position. In accordance with a feature of the invention a positive connection is provided between a treadle and the knife for moving the knife out of operating position upon move- -ment of the treadle and mechanism is also provided for disengaging the positive connection upon further movement of the treadle, thereby enabling resilient means to return the knife to operating position. In the illustrated construction means is also provided for delaying the return of the knife to operating position during a portion of the further movement of the treadle to afford the operator time to remove a workpiece.

The invention further resides in features of construction and combinations and arrangements of parts hereinafter described and claimed, the

' advantages of which will be apparent to those skilled in the art from the following description.

The invention will be described with reference to the accompanying drawing, in which Fig. 1 is a view in side elevation of a portion of a channeling machine provided with the improved knife-lifting mechanism;

Fig. 2 is a sectional view taken on the line II-II of Fig. 1;

Fig. 3 is a sectional view in front elevation showing a channeling knife and its supporting means in relation to a work table.

As has already been mentioned, the improvements about to be described are illustrated as embodied in a machine of the type disclosed in United States Letters Patent above referred to. For convenience, therefore, those portions of the machine shown herein which are identical with portions disclosed in the patent will be identified herein by the same reference characters as in the patent.

The supporting structure of the machine comprises a frame 16 upon which is mounted a head 14. Referring to Fig. 3, a channeling knife 42 is carried by a slide I86 which is guided for vertical movement in a slideway formed in a carrier 62 which, in turn, is supported for oscillatory movement upon a pin I56 journaled in a bearing I60 formed. in the head 74. The slide I86 is urged downwardly toward a work-supporting table 40 by a spring 224 housed within a bore in the upper portion of the slide. The upper end of the spring 224 bears against a plunger 226 which engages a screw 228 threaded through a bracket 230 secured upon the carrier 62. The lower end of the; spring 224 bears against the lower end of the above-mentioned bore and thus urges the slide downwardly to a stop position determined by the engagement of a lug 232 (Fig. 1) and a shoulder formed on the carrier 62. The stop lug 232 is formed at the extremity of a cross-bar 236 secured to the slide I86. The knife 42 forms the inner lip of a double lipped insole. In Fig. 3 is shown also an edge knife 44 for forming the outer lip of such an insole.

The knife 42 is raised from its operating posi tion by an arm 58!! secured upon a rockshaft 584 which is journaled in suitable bearings formed in the head 14. The rockshaft 584 is operated, through mechanism presently to be described, by a treadle 490 fulcrumed upon a shaft 492 which is journaled in the base of the machine. An arm 664 secured upon the shaft 492 is pivotally connected to the lower end of a rod 602. A spring 683 surrounding the rod 602 urges the rod upwardly and tends to hold the treadle 490 in normal raised position. All the parts so far described are identical with corresponding parts disclosed in the above-mentioned Letters Patent No. 2,015,064 and are identified by the same reference characters.

The upper end of the rod 602 is pivotally connected to an arm "10 having a hub I02 by which the arm is fulcrumed upon a stud 104 secured in the head 14. Integral with the arm 10!] and extending in an opposite direction from the hub 102 is an arm 106. A third arm I08 integral with the arms 10! and H36 extends upwardly from the hub 02. The arms 190, I96 and 108, together with the hub 102, thus constitute a three-armed lever fulcrumed upon the stud 104. Mounted for heightwise sliding movement in a guideway 10! formed in the arm 108 is a block H0. A plate H 2 secured to the arm 108 by a pair of screws H4 retains the block H0 in its slideway. A tension spring 1 I 6 secured at its upper end to the arm 108 and at its lower end to the block H urges the block upwardly. A narrow groove 1|! formed in the arm 108 accommodates the spring H6. Secured in the block H0 is a pin H8 upon which is mounted a roll 120. The block H0 is retracted in its guideway 101 against the force of the spring H6 by a flange 122 formed on one arm of a bell crank 724 which is journaled upon a stud 126 secured in a bracket 728 extending from the head 14. The other arm of the bell crank 124 is connected by a link 13!) to the arm 1%. In order to provide for adjustment of the bell crank 124 relatively to the arm 106 the lower end of the link 13!! is pivotally mounted upon an eccentric 132 formed upon a pin 134 which may be secured in any desired position of rotary adjustment in the arm 1% by a set screw [36.

Movement of the treadle 49B is communicated through the block I I 0 to an arm '38 secured upon the rockshaft 584. Integral with the arm 138 is an extension 140 in which is formed a latching shoulder 142 engageable with a detent M4. The detent 144 is pivotally mounted upon a pin 146 secured in thehead 14. connects the upper portion of the detent to the hub of the arm 138 and urges the detent into v latching position. An abutment flange 150 formed in the plate H2 engages a screw I52 threaded through the detent 144.

In operating the improved mechanism the treadle 490 is depressed, causing the rod 662 to rock the three-armed lever 100, 706 and 108 in a counterclockwise direction, as viewed in Fig. 1. The upper end of the block H0 will thus rock the arm'138 in a clockwise direction, causing the arm 580 to raise the knife slide I86. As the block H0 is swung to the left, as viewed in Fig. 1, it is also depressed by the bell crank I24 until it disengages the arm 138. By that time,

however, the detent 144 has been drawn by the 224 is then free to return the knife 42 to operating position. The screw 152 may be adjusted to engage the abutment 150 at any desired point in the travel of the treadle 490 to provide a great- .er or less dwell of the knife in its raised position to enable the operator to move the work-piece before the knife descends. An accurate adjustment to insure disengagement of the block H0 from the arm 138 as soon as the detent I44 comes into position to engage the shoulder 142 may be' effected by turning the pin I34. 7

The above-described mechanism offers certain advantages in a machine such as that disclosed in the above-mentioned Letters Patent No.

2,015,064. In that machine, it will be recalled,

the work is fed along the table 40 by a pair of four-motion feed dogs mounted in a pair of oscillating carriers, respectively. One of these carriers, already. referred to by the reference nu meral 62, is shown herein. The feed dogs derive their components of movement in the direction of feed from the oscillating carriers; they are also raised and lowered by other means to cause them to grip the Work against the table during their advancing movements and to release the work during their return movements. Each of the feed dogs carries a slashing knife in the form of a cutting edge arranged to form an A tension spring 148 incision in the face of the sole as the dog descends, which incisions will extend across the lips to be formed and will facilitate raising the lips at the toe end and at other curved portions of the sole. The channeling operation may be stopped at any desired point by depression of the treadle 499 which results in raising the channeling knives and depressing the work table. The feed dogs are not affected by the raising of the knives and continue their up and down movements, holding the sole down relatively to the knives and thus enabling the knives tocut ou or emerge from the surface of the sole. In order to insure against any damage which might result from the feed dogs and the slashing knives striking the surface of the work tablewhile the machine is running idly, mechanism is provided for automatically stopping the up and down movement of the feed dogs. This stopping mechanism is controlled by the knife slide I86 which in turn is controlled by a presser gage riding upon the upper surface of the sole. If a sole being fed through the machine should be allowed to run out without the operator depressing the treadle 4%, the lowering of the presser gage resulting from the removal of the sole will at once cause the up and down movements of the feed dogs to cease. When the operator depresses the treadle 490 to cause the channeling knives to cut out, it is desirable to insure the stopping of the up and down movements of the feed dogs before the treadle is released; inasmuch as the release of the treadle enables the work table to move upwardly into its normal position. The machine disclosed in the above-mentioned Letters Patent is accordingly provided with a mechanism for releasing the channeling knife slides before the completion of the downward movement of the treadle which at first caused them to be raised. As soon as the knife slide I86 is thus returned to its lowermost position by the spring 224, the automatic mechanism above: referred to will stop the up and down movements of the feed dogs. Then when the treadle 490 is released the work table 48 will be raised to normal position without the danger above mentioned. The

up and down movements of the feed dogs will be resumed automatically when a sole is introduced.

One advantage offered by the improved mechanism disclosed herein, when applied to a machine of the type under consideration, resides in the fact that the knife-lifting instrumentalities are positive and operate with certainty. Another advantage is that the channeling knives do not descend immediately upon reaching their uppermost positions (the height to which they may be raised'and consequently the duration of their upward movements being strictly limited by practical considerations) but remain raised for an appreciable interval While the operator is depressing the treadle. This insures against any chance of the knives descending and cutting into the work before the table has been lowered out of the way, however slowly the operator may depress the treadle. In addition "to these advan-- tages, the improved mechanism disclosedherein provides for a quick raising of the channeling knives and calls for a minimum of effort on the part of the operator in depressing the treadle.

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

1. In a sole fitting machine, a knife for operating upon a sole, means for urging said knife tonection between said treadle and said knife for moving said knife out of said operating position upon movement of said treadle, and mechanism operable upon further movement of said treadle to disengage said positive connection and thereby to enable said urging means to return said knife to operating position.

2. In a sole fitting machine, a knife for operating upon a sole, resilient means for normally holding said knife in operating position, a treadle, a positive connection between said treadle and said knife for moving said knife out of operating position upon movement of said treadle, said positive connection including a pair of abutting members through which movement may be transmitted, and means for retracting one of said abutting members from engagement with the other abutting member laterally of their path of movement to release said knife and thereby to enable said resilient means to return said knife to operating position.

3. In a sole fitting machine, a knife for operating upon a sole, a spring for normally holding said knife in operating position, a treadle, a connection between said treadle and said knife for moving said knife out of said operating position upon movement of said treadle, said connection being constructed and arranged to release said knife upon further movement of the treadle, and means for delaying the return of said knife to operating position under the influence of said spring during a portion of said further movement of the treadle to afford the operator time to remove a work-piece.

4. In a sole fitting machine, a knife for operating upon a sole, a spring for normally holding said knife in operating position, mechanism for moving said knife out of operating position against the force of said spring, a treadle, means connected to said treadle for operating said mechanism to move the knife out of operating position upon movement of the treadle, means for holding said knife in the inoperative position to which said knife has been moved by said treadle-operated means, thereby afiording the operator time to remove a work-piece, and means associated with said treadle-operated means, for releasing said holding means upon continued movement of the treadle thereby to enable said spring to return the knife to operating position after the work-piece has been removed.

5. In a channeling machine, a channeling knife, a spring for normally holding said knife in operating position, a rockshaft, means operated by said shaft for raising said knife out of operating position against the force of said spring, an arm on said rockshaft for rocking the shaft, a treadle, mechanism operated by movement of said treadle to rock said arm to cause the knife to raise, a detent for holding the arm in the position to which it has been rocked by said mechanism, and means on said mechanism for tripping said detent upon further movement of said treadle, thereby releasing said arm and enabling said spring to lower the knife into operating position.

TRYG'VE GULBRAN'DSEN.

Images