US1093200A - Ejector for presses. - Google Patents

Description

M. W. OBRIBN.

HECTOR FOR PRESSES.

APPLICATION FILED DEG. 24, 1913.

1,093,200. Patented Apr. 14, 1914.

llnwcen'ntmnr 8 M i WWI/311% TED STATES EJECTOR FOR PRESSES.

To all whom it may concern Be it known that I, MIOI-IAEL W. OBRIEN, a citizen of the United States, and resident of Rochester, in the county of Monroe and State of New York, have invented certain new and useful Improvements in Ejectors for Presses, of which the following is a specification.

This invention relates to presses of the type in which blanks, such as top-lifts for heels, are compressed within a die which has openings at its opposite faces, so that a blank may be ejected from the die by means of an ejector passing through the die.

The object of the invention is to produce an ejector, of simple construction, which will remove a blank from the die with certainty and without any danger of the blank falling back into or upon the die after it has been ejected therefrom. To this end I employ, in addition to the usual member for engaging a blank and discharging it from the die, a member which operates, in conjunction with the first mentioned member, to grip the blank during the ejecting operation, and to release it only after it has been carried to a point where it cannot fall back into or upon the die.

In the accompanying drawings :-Figure 1 is a rear-elevation of a machine embodying the present invention; Fig. 2 is a planview of a part of the machine, showing particularly the ejector-mechanism; Fig. 3 is a Fig. 2, but on a larger scale; and Figs. 4 and 5 are similar to Fig. 3, except that they show the parts in different operative position.

In United States Letters Patent No. 1,034,493, granted to me August 6, 1912, a blank-pressing machine is disclosed in which an ejector is employed,this ejector operating through the die and accordingly I have illustrated the present invention as applied to a machine of the type disclosed in that patent, and since the machine is fully; disclosed therein its general construction and operation are not particularly described in this application. As shown in 1, the machine comprises pressing-instrumentalities including a plunger 10 reciprocated by eccentric connections with a power-shaft 11. The blanks 12, which in this case are toplifts for heels, are compressed in dies 14, which are intermittently rotated, in a horizontal plane, by means of a carrier 15 actu- Specification of Letters Patent.

Application filed. December 24, 1913.

Patented Apr. 14, 1%14.

Serial No. 808,575.

ated by a vertical shaft 16 suitably connected with the power-shaft 11. The dies 14 are annular in form, as shown in Figs. 3, 4 and 5, being open at their upper and lower faces to facilitate the admission and discharge of the blanks in the same manner as in the said patent.

As in the machine of the patent, the ejec tor is actuated by a horizontal rockshaft 17, journaled on the frame of the machine, this shaft being oscillated intermittently by connections with the power-shaft 11, including an eccentric-strap 18, a segmental gear 19 which is rocked thereby, and a pinion 20 on the end of the rock-shaft 17. The oscillations of the rock-shaft thus occur in timed cooperation with the intermittent movements of the dies 14.

The ejector-mechanism comprises two members which are hereinafter designated the upper and lower ejector-members, respectively. The lower ejector-111cm ber comprises an arm 21 fixed to the rockshaft 17, and a finger 29. which is curved 3 concentrically with the axis of the shaft 17.

This finger is adapted to be projected upwardly through the die 14 by the rocking movement of the rock-shaft, and its extremity moves in a curved path, whereby the finger first engages the lower surface of a blank, and then raises the blank and forces lit upwardly and also outwardly from the 1 die, as shown in Figs. 4 and 5.

vertical section on the broken line. 8-3 in I The operation of the lower ejector-1nem her, as just described, is nearly similar to the operation of the ejector in the said patent, but in the patented machine the discharge of the blank fromthe ejector is controlled solely by the action of gravity, dependence being placed upon the inclined final position of the end of the ejector to insure that the blanks shall be discharged laterally, and not fall back upon the die. In the present construction, however, 1 control the movements of the blank positively until the lower ejector-member has reached a position from which it is impossible for the blank to fall back upon the die. This is accomplished by the use of the upper ejector-member, which comprises an arm 23 carrying a laterally-projecting finger 24, of

"which the extremity registers with the extremity of the finger 22 of the lower memher. The arm 28 is fixed upon a rock-shaft 25, which is ournaled upon the frame of the machine in alinement with the rockshaft 17, so that the two members may swing about the same axis. A spring 26 is coiled about the shaft 25, and connected, at one end, to the frame of the machine, and at the other end to a collar 27 fixed on this shaft. This spring tends constantly to swing the upper ejector-member toward the lower member, and in the normal position of the upper member it rests horizontally just above the upper surface of the die, as shown in Fig. 3. This figure shows also the normal position of the lower ejector-member. Upon the arrival, between the ejectormcmbers, of a die carrying a blank upon which the compressin operation has been performed, the shaft 1 is rocked by the eccentric-mechanism, so that the lower ejectormember swings upwardly through the die, thus engaging and raising the blank 12.- This movement brings the blank into engagement with the upper ejector-member, and during the continued movement of the lower member the upper member is held forcibly against the blank, but yields to the movement of the lower member and the blank, thus clasping the blank securely until the parts reach the extreme position shown in Fig. 4, wherein the blank has been carried so far to one side of the die that upon its release it cannot fall back in or upon the die. When the upper ejector-member reaches this position it'is momentarily retained therein by a detent 28. This detent, as shown in the drawings, is in the form of an arm secured to the hub of the arm 23 by means of two studs 29 and 30, which pass loosely through openings in the detent. A spring 31, coiled about the stud 30, tends to hold the detent in the position shown in Fig. 1. A beveled lug 32 is so positioned on one of the brackets 33, on which the shaft 17 is journaled, that during the ejecting operation the detent rides over and then snaps into position beneath this lug, as shown in Fig. 4. Accordingly, at the commencement of the return-movement of the lower ejector-member the upper member is retained in the position of Fig. 4:, so that it cannot follow the lower member. The blank is thus released and permitted to fall by gravity, as shown in Fig. 5.

The release of the upper ejector-member is caused automatically by the return-movement of the lower-member. To this end the arm 21 is provided with a beveled surface 34 adapted to cooperate with the detent. When the lower ejector-member reaches the posi- Gopies of this patent may be obtained for five cents each, by addressing the Washington, D. G.

tion of Fig. 5, in its return-movement, this beveled surface forces the detent outwardly, thus disengaging it from the lug 32, and thereupon the spring 26 at once rocks the shaft 25 and the upper ejector-member back to the normal position of Fig. 3, and the parts are thus ready for operation upon the next blank to be brought between them.

l/Vhile my invention has been described as applicable to a machine adapted for the particular purpose of compressing top-lifts, it will be understood that it is applicable to machines for various other purposes, and that, in general, it is not limited to the embodiment thereof hereinbefore described and illustrated in the accompanying drawings.

I claim 1. An ejector for a press of the type in which flat blanks are compressed, in horizontal position, in a die open at top and bottom; the ejector comprising an upper member and a lower member adapted to engage the respective surfaces of a blank in the die and movable in a direction to raise the blank from the die and carry it to one side thereof, and mechanism, for actuating and controlling said ejectonmembers, adapted to cause movement thereof in unison during the ejecting operation but tocause a separation of said members, after the ejecting operation and before the return of the lower member to normal position, whereby the blank is released while at one side of the die. V V

2. An ejector for a press of the type in which blanks are compressed in a die open at opposite faces; the ejector comprising two members adapted to engage opposite surfaces of a blank while in the die, and'movable, substantially about a common axis, in

a direction to discharge the blank from the die; mechanism for moving one ejectormember in said direction; a spring tending to move the second ejector member in the opposite direction; and detent-mechanism cooperating with both ejector-members and adapted to retain the second member against return-movement during, the first part of the return-movement of the first ejectormember, and then to release the second member and permit it to be returned by said spring. 7

. MICHAEL W. OBRIEN. Witnesses: FARNUM F. DORSEY, D. GURNEE.

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