US2035787A - Work grip and mechanism for pressing machines - Google Patents

Description

March 31, 1936. P, N BRAUN 2,035,787

WORK GRIP AND MECHANISM FOR PRESSING MACHINES Filed Aug. 9, 1929 INVENTOR.

4 of any suitable construction.

Patented Mar. 31, 1936 UNHTED STATES PATENT OFFICE WORK GRIP AND MECHANISM FOR PRESSING MACHINES Application August 9, 1929, Serial No. 384,674

11 Claims.

This invention relates to garment and laundry pressing machines and has for its object a particularly simple, efficient and easily operable work grip for gripping a portion of the work on one of said elements on which the work is placed, as the lower pressing element, so that the work being held at one point the operator can pull or stretch the portion of the work on the lower element.

The invention consists in the novel features and in the combinations and constructions hereinafter set forth and claimed.

In describing this invention reference is had to the accompanying drawing in which like characters represent corresponding parts in all the views.

Fig. 1 is a side elevation of a pressing machine embodying this invention.

Fig. 2 is an enlarged fragmentary elevation of the work grip and contiguous parts.

Fig. 3 is an end elevation of parts seen in Fig. 2.

.Fig. 4 is a fragmentary plan view of the lower pressing element and the grip member.

As here illustrated my invention is embodied in a conventional type of garment and laundry pressing machine in which the cooperating pressing elements are respectively, a stationary buck I and a head 2 movable toward and from the buck, the buck I being mounted on a suitable bolster 3 which in turn is mounted on a frame The head 2 is carried by the usual frame or yoke lever 5 pivoted between its ends at It to an upright I rising from the frame and usually forming an upward extension of the rear leg of the frame. The buck I may be covered with the usual padding. The head 2 may be also padded but is usually unpadded.

The invention particularly has for its object a work grip movable into and out of position to grip the work at one end of the buck I so that the operator can stretch the work by pulling toward the other end of the buck and thus arrange the work on the buck without folds or wrinkles. 8 designates the work grip which is here shown as a plate movable into and out of position over one margin of the buck and toward and from the buck to clamp and release the work, these movements being successive. Preferably, the carrier 9 of the work grip is movable in a vertical plane into and out of position to coact with the end margin of the pressing face of the buck. In the illustrated embodiment of my invention the grip 8 is supported by a carrier 9 having a successive pivotal or swinging and a rectilinear clamping movement into operative position to grip the work and successive rectilinear and swinging movements out of operative position. The carrier 9 is here shown as 5 a rod which is usually hollow, the carrier being slidably mounted in a block In which block has a horizontal pivot, the ends of which are received in trunnions II mounted in the bifurcated end I2 of a suitable support I3. The 10 carrier 9 is slidable in a direction at a right angle or radial to the axis of the block II). The rectilinear or clamping movement of the grip 8 is against the action of a spring I4 here shown as encircling the carrier 9 and interposed between the block I0 and a collar or shoulder I5 on the carrier 9. The swinging movement of the carrier 9 in a vertical plane to bring the work grip 8 into position over the margin of the buck I, is limited by a stop I 6, this being a roller arranged in the path of an engaging surface or track I1 of the carrier 9. The support I3 is a bracket depending from the buck I.

Preferably, both the head and the work grip head are power actuated, as the buck I and the head 2 are comparatively large and are large enough to press large or long articles, as sheets. They are large enough to press one half of a large sheet or the entire sheet if folded double. The power means for actuating the head is a fluid operated motor, as a cylinder I8 having a piston I 9 movable therein, and the motion transmitting means between the piston and the head 2 in addition to the yoke lever 5 comprise a link 2I pivoted at one end at 22 to the piston rod 20 and at its other end at 23 to a link 24, this link 24 being also pivoted at 25 to the base of the frame. Further, the motion transmitting means comprises a link 26 pivoted at 21 to the link 24 and at 28 to the rear arm of the yoke lever 5, the links 24 and 26 forming a toggle. The link 2| is arranged at an angle to both the piston rod 20 and the toggle consisting of the links 24 and 26, and is guided in its movement to have a pulling action on the toggle to straighten it, by an angular cam slot 29 formed in a bracket 30 fixed to the frame, the link having a follower 3| movable in the slot. The cylinder is pivoted at 32 to have an oscillating movement.

Obviously, when the piston is actuated, the follower 3| will move along the angular slot 29 and impart an endwise movement to the link 2| and the toggle composed of links 24 and 25 will be straightened. The piston is single acting and the press is opened, when the pressure in the cylinder is released, by counter-springs 33 and also to some extent by a spring 34 which acts on the link 2| to return it to the upper end of the slot 29. The specific construction of the actuating and motion transmitting means forms no part of this invention.

The actuating means for the work grip 8 come prises a pressure operated motor and motion transmitting means between the motor and the carrier 9 including a reciprocating part which moves in a direction at an inclined angle to the sliding movement of the carrier 9, in order to effect, first, the swinging movement of the carrier 9 to carry the grip 8 over the margin of the buck I and then, when the swinging movement is stopped by the roller or stop I6, to slide the carrier 9 vertically against the action of the spring I4, to clamp the grip 8 on the buck l or the work thereon. The motor for the grip 8 is here illustrated as a cylinder 35 having a piston 36 therein, and a piston rod 31 connected to the lower end of the carrier 9. A stop collar 38 is mounted on the rod 31 tolimit the outward movement of the carrier by engaging the lower end of the cylinder 35. The cylinder 35 is pivoted or swiveled by a ball-and-socket joint 39 to an arm 40 on the bracket l3 and the rod 3'! is pivoted or swiveled by a ball-and-socket joint at 4!! to an angle arm 42 to the lower end of the carrier 9. The piston 36 is single acting and is returned to its starting position when the pressure in the cylinder 35 is released by the action of the spring M on the carrier 9 and the weight of the carrier 9 above the trunnions II. The weight of the upper part of the carrier 9 above the trunnion will cause the carrier 9 to fall into the position shown in dotted lines in Figure 2 at which time the stop collar 38 will engage the end of the: cylinder 35 and prevent further movement of the carrier 9.

The means for controlling the flow of motive fluid, as compressed air, to and from the cylinder 18 may be of any suitable form, size and construction.

In operation, the operator spreads the work, as for instance a sheet, on the buck, then ope-rates the control means to operate the piston in the cylinder 35 to shift the carrier 9 and work grip 8 from its dotted line position to its full line position, Fig. 2. The operator then smooths the work on the buck l by pulling the work from the end thereof remote from the work grip. The operator then releases the work grip by operating the control means and then closes the press.

What I claim is: I

1. A pressing machine including, in combination, cooperating pressing jaws adapted to open and close upon the work, a work grip cooperating with one of the pressing jaws, means below said pressing jaws for supporting the work grip for movement in a vertical plane toward and away from the cooperating pressing jaw in the direction of the length of the jaw and into and out of position over the margin of the pressing face of said jaw, and a power means for moving the work grip into such position and for moving said work grip rectilinearly toward said lower pressing element and for moving the work grip in a reverse manner out of operative position.

2. A pressing machine including, in combination, cooperating pressing elements mounted to open and close upon the work, a work grip cooperating with one of the pressing elements, means movable in a vertical plane and supporting the work grip for movement over the end of the pressing element into and out of position over the margin of the pressing face of said element and movable perpendicularly toward and from said element, and means for actuating the work grip to successively move the same over said margin of the pressing element and then move, the work grip rectilinearly toward the pressing element to grip the work and for moving the work grip out of operative position in reverse order.

3. In a pressing machine, in combination, cooperating pressing elements mounted to open and close upon the work, a work grip movable into and out of position to coact with the margin of the pressing face of one element; a carrier for the grip, a horizontal pivot for the carrier to enable the carrier to move in a vertical plane and thereby move the grip in the direction of the length of the element toward one end of said element and over the margin thereof, means cooperating with the carrier to prevent further movement over said element and mounting the same for shifting the grip rectilinearly relatively to its pivotal axis thereby enabling the grip to movetoward the coacting element, and actuating means for moving said carrier pivotally and rectilinearly successively to bring the grip into operative position and in reverse order to carry the grip out of operative position.

4. A work holder for a pressing machine having cooperating pressing jaws adapted to open and close upon the work comprising, a work grip for cooperating with one of said jaws, a pivoted block, a carrier for the grip mounted in the block to slide transversely of the pivotal axis thereof, and actuating means for successively moving the block on its pivot and sliding the carrier in the block to carry the grip into operative position and to slide the carrier and move the block on its pivot to carry the grip out of operative position.

5. A work holder for a pressing machine having cooperating pressing jaws adapted to open and close upon the work comprising, a work grip for cooperating with one of the jaws, a pivoted block, a carrier for the grip mounted in the block to slide transversely of the pivotal axis thereof, a returning spring acting on the carrier and normally resisting sliding movement thereof, and actuating means connected to the carrier and tending to slide the same against the action of said spring.

6. A work holder for a pressing machine having cooperating pressing jaws adapted to open and close on the work comprising, a work grip for cooperating with one of the jaws, a pivoted block,

a carrier for the grip mounted in the block tomally resisting sliding movement thereof, andactuating means connected to the carrier and tending to slide the same against the action of said spring, said actuating means acting on the carrier in a direction at an inclined angle to the sliding movement.

'7. A work holder for a pressing machine having cooperating pressing jaws adapted to open and close on the work comprising, a work grip for cooperating with one of the jaws, a pivoted block, a carrier for the grip mounted in the block to slide transversely of the pivotal axis thereof, the carrier having a shoulder spaced from the block, a returning spring between the shoulder and the block and normally resisting sliding movement of the carrier, and actuating means connected to the carrier and tending to slide the same. against the action of said spring, said actuating means acting on the carrier in a direction at an inclined angle to the sliding movement.

8. A work holder for a pressing machine having cooperating pressing jaws adapted to open and close on the work comprising, a. work grip for cooperating with one of the jaws, a pivoted block, a carrier for the grip mounted in the block to slide transversely of the pivotal axis thereof, a returning spring acting on the carrier and normally resisting sliding movement thereof, actuating means connected to the carrier and tending to slide the same against the action of said spring, said actuating means acting on the carrier in a. direction at an inclined angle to the sliding movement, and a stop for limiting the swinging movement of the carrier into operative position.

9. A pressing machine comprising, a supporting frame, a buck mounted on the frame, a head movable toward and from the buck, means for actuating the head, a work grip for coacting with the margin of the pressing face at one end of the buck, a bracket positioned below the buck, a carriage for the work grip pivotally and slidably mounted on the bracket, the pivotal mounting being upon a horizontal pivot so as to have a swinging movement to carry the grip into and out of position over the margin of the buck and the slidable mounting permitting the grip to have a clamping movement toward and from the buck, and means for actuating the carriage.

10. A pressing machine comprising, a supporting frame, a buck mounted on the frame, a head movable toward and from the buck, means for actuating the head, a work grip for coacting with the margin of the pressing face at one end of the buck, a bracket positioned below the buck, a carriage for the work grip pivotally and slidably mounted in the bracket, the pivotal mounting being upon a horizontal pivot so as to have a swinging movement to carry the grip into and out of position over the margin of the buck and the slidable mounting permitting the grip to have a clamping movement toward and from the buck, means for actuating the carriage, and a stop for limiting the swinging movement of the carrier into operative position.

11. A pressing machine including a supporting frame, a buck mounted on the frame, a head movable toward and from the buck, means for actuating the head, a bracket below the buck, a work grip movable into and out of position over the margin of the pressing face of the buck and toward and from the said margin to clamp the work on the buck, a block, a horizontal pivot swingably carrying the block on the bracket, a carrier for the work grip slidably mounted in the block to move transversely of the pivotal axis of the block, a returning spring for resisting sliding movement, a stop for limiting the swinging movementof the carrier into operative position, actuating means carried by the bracket and including a reciprocating part connected to the carrier and extending at an inclined angle to the direction of the clamping movement of the carrier.

PHILIP N. BRAUN.

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