US2837992A - Inclining attachment for press - Google Patents

Description

June 1958 R. E. WISSMAN I 2,837,992

INCLINING ATTACHMENT FOR PRESS Filed Jan. 6, 1954 3 Sheets-Sheet 1 INVENTOR. REUBEN E. WISSMAN BY 5 7% ATTORNEYS FIG-8 52 IOO 98 94". 9B

2 June 10, 1958 R. E. -W|SSMAN INCLINING ATTACHMENT FOR PRES$ Filed Jan. 6, 1954 3 Sheets-Sheet 2 FIG.- 3

2,837,992 INCLINING ATTACHMENT FOR PRESS Reuben E. Wissman, Minster, Ohio, assignor to The MinsterMachine Company, Minster, Ohio, 2 corporation of Ohio 7 Application January 6, 1954, Serial No. 402,547

' 4 Claims. (Cl.100--231) This invention relates to presses, and particularly to an inclining attachment for a press.

A great many metal working presses, particularly mechanical presses, are arranged so that they can be tilted for the purpose of facilitating operating, work therein. Heretofore, this has generally been accomplished by means of a vertical screw connected between the press frame and, the leg structure of the press in about the center thereof and manually operated for tilting the press frame on the leg structure. A device of this nature is satisfactory for the purpose of tilting the press frame, but has certain other disadvantages, namely, that it obstructs the back of the press, making it difficult to place tote boxes and the like behind the press for receiving operated workpieces, and also requires considerable effort to adjust the press frame.

Having the foregoing in mind, it is a primary object of the present invention to provide an inclining attachmerit for tilting a press frame on the supporting leg structure therefor which will avoid the drawbacks referred to above.

A particular object of this invention is the provision of an inclining attachment for tilting the press frame on the leg structure which will leave the back of the press unobstructed.

Another particular object is the provision of an incl inirig attachment for a press which is power operated, th'er'eb'y relieving the operator of the work of manually operating the inclining attachment.

A still further object is the provision of an inclining tend to bind or become difficult t6 operate in any posi-' tion ofzadju'strnent of the press frame. I I

- These and other objects and advantages will become more apparent upon reference to the following descrip-' tion taken in connection with the accompanying drawings, in-fwhichz' V Figure 1 is a side elevational View of a' press having arr inclining-attachment according to the-present invention;

-Fi-gure 2 is a plan section throughthe press frame, indicated by line 2-2. on Figure-'1;

Figure 3 isjaperspective' view'looki'ng in the direction of. the arrow 3 in Figure 2-,, showing the inclining attach men tf lj the' press according to this invention;

.Fi-gure 4 is another perspectiye'view looking in the direetion-of the, arrowl4 inl igu-re Z; I

1 EigureS' isa plan section, indicated byfline' 5'-5 on Figure 3, showing the slid'able nut in the press-leg forming a partof theinclining, attachment;

rates Patent its Figure l position, the link 26 will move toward a vertical position, thus tending to reduce the, possibility Figure 6 is a vertical section at the upper end of the inclining screw showing the manner in which it is supported in the leg of the press;

Figure 7 is a plan section, indicated by line 7-7 on Figure 4, showing more or less diagrammatically a ratchet mechanism forming a part of the drive to the screw 7 of the inclining attachment; and

Figure 8 is a diagrammatic representation of the control circuit for controlling the operation of the drive motor for the inclining attachment.

Referring to the drawings more in detail, the press illustrated in Figure 1 comprises a press frame 10 pivotall'y connected by pivot pins or bolts 12 with a base structure that comprises the spaced legs 14. Located within the press frame is a press slide 16 adapted for being driven through a suitable gear train by a drive motor 18.

The press frame 10 is tiltable about the pivot pins 12 by a mechanism connected between one of the legs 14 and the back edge of one of the side members of the press frame. The inclining attachment is best illustrated in Figure 3, wherein is will be seen that there is a bearing block 20 fastened to the back edge of one side part of frame 10, as by the cap screws 22. Preferably, the back edge of frame 10 is notched, as at 24, to receive block 20 to provide for good support of the block on the press frame at all times. 7 V

The block 20 is pivotally connected with the upper end of a link 26 by pivot pin 28, while the lower end of link 26 is connected with a block 30 located in leg 14.

The arrangement of block 30 in leg 14 and its connection with link 26 will be seen in Figure 5, wherein it will be noted that leg 14 is formed with a slot 32 on its inner side in which block 30 is fitted, with a fiat gib 34 being provided that will retain block 30 in place.

Figure 5 will also show that block 36 comprises a trunnion portion 36 extending through link 26 and with a plate 38 being secured to the trunnion portion to retain the link in assembled relation therewith.

Block 30 has a threaded bore therein through which extends screw 40 that runs vertically within slot 32, and which has its upper end supportingly journaled in a support block 42, as will be seen in Figure 6. Block 42 has therein an anti-friction bearing 44, the outer race of which is supported by block 42, and the inner race of which closely surrounds the upper end of screw 49 and supports the said screw by means of collard-6 abutting the inner race of the bearing and pinned to screw 46* by pin 48. 4 k 7 At this point, it will be apparent that rotation of screw 40 will cause movement of block 30 vertically along slot 32, and thiswill bring about tilting of press frame 10 relative to the supporting legs thereof because of its connection with nut 36 by link 26. It will also be apparent that, as the press frame tilts backwardly from for being received in the apertures 52 in the sides of the press frame and the apertures 54 in an upstanding rib 56 on the legsof the press. new be understood, how-' ever, that the press could be tilted to positions intermediate the said predetermined positions if so desired.

It will also be noted that the inclining attachment according to the present invention leaves the back of the press open, as will best be seen in Figure 2, so that tote boxes or lift trucks can readily be run into the space between the legs at the back of the press, thus greatly facilitating the handling of workpieces from the press that have been dropped through the back after the workpieces have been operated upon by the press.

According to the present invention it is contemplated to power operate screw 40, and with this in mind I provide on the upper end of screw 40, as will be seen in Figure 7, a ratchet drive disk 60 adapted for being drivingly connected with drive arm 62 by means of one or the other of the directional pawls 64, 66, which are spring urged by spring 68 toward the periphery of disk 60, and which can be made selectively effective by cam 70 adapted for being turned between its two operative positions by finger lever 72. Detent mechanism 74 re tains cam 70 in its adjusted positions. Drive arm 62 has its outer end slotted at 80 and connected by clevis 82 with the end of a ram 84 that extends into cylinder 86 of an air motor. The air motor is of a type'which will continuously reciprocate when energized by a supply of compressed air thereto. This is accomplished by providing the air motor with a reversing valve 88 adapted for being shifted between its two operative positions by a mechanism, generally indicated at 90, and which mechanism is controlled by a reciprocable rod 92 adapted for actuation by a member 94 carried on rod 96 that is connected with ram 84. V Springs 98 and the collars 100 on rod 92 provide the means whereby reciprocation of rod 96 and member 94 will bring about axial movement of rod 92 and therefore shifting of valve 88.

The control circuit is diagrammatically represented in Figure 8, wherein it will be seen that connected between power lines L1 and L2 and in series with normally open push button 102 is a solenoid 104 for opening a normally closed shut-off valve 106 located in compressed air conduit 108 leading to the inlet of reversing valve 88 for the air motor. Figure 8 also indicates a detent mechanism at 110 for the shifting mechanism 90 for the reversing valve which will insure that the reversing valve always shifts completely to one of its operative positions when the mechanism 90 is actuated.

It will be evident that the screw could be manually operated if desired, and that the advantage would still obtain that the back of the press was left open, while at the same time the actuation of the inclining screw would be relatively easy and would not tend to bind in any position of the press frame. However, it is preferred that the screw be provided with the ratchet drive and motor operator as disclosed for the purpose of making the adjustment of the press frame as easy as possible while speeding up this operation. While the air motor illustrated and described is to be preferred for reasons of economy and the like, it will be evident that other motor means could also be utilized, such as an electric motor, and the same advantages of rapid power operation of the inclining screw would be had.

While the inclining attachment has been illustrated as being an integral part of the press structure, it will also be evident that the inclining attachment could be manufactured and sold as a separate article of commerce. This could be accomplished by constructing that portion of the leg of the press containing the slot 32 as a separate member and securing it to the inside of the press leg by bolts. The outline at 112 in Figure illustrates how the slide for the block 30 could be bolted to the press leg,

In this case, the block at'the upper end of screw 40 would preferably be mounted on the upper end of the slide member so that-the entire portion of the inclining attachment associated with the leg could be supplied as a single unit and secured to the press leg as a single integral unit.

It will be understood that this invention is susceptible to modification in order to adapt it to different usages and conditions, and, accordingly, it is desired to comprehend such modifications within this invention as may fall within the scope of the appended claims.

I claim:

1. In an inclinable press, a press frame having side plates and being pivotally mounted between a pair of spaced upright stationary supporting legs, there being a vertical guide groove in the inner face adjacent the rear edge of one of said supporting legs, a movable block having a threaded bore therethrough Within said groove and restrained against lateral movement by the walls of said groove, a gib along one edge of said vertical groove to retain said block within said groove, there being a recess in the rear edge of the side plate adjacent said one leg, a second block fixed within said recess, a link pivotally connecting said blocks, a screw within said guide groove and passing through said threaded bore of said movable block, means rotatably supporting the upper end of said screw, a reversible ratchet drive on the upper end of said screw and having a drive arm extending therefrom, a reciprocating motor connected to said drive arm, means for reversing the direction of travel of said motor to resultin continuous reciprocation thereof when said motor is energized, and means for controlling the energization of said motor.

2. In an inclinable press, a press frame having side plates and being pivotally mounted between a pair of spaced upright stationary supporting legs, there being a vertical guide groove in the inner face adjacent the rear edge of one of said legs, a movable block having a threaded bore therethrough within said groove and restrained against lateral movement by the walls of said groove, a screw within said groove passing through said threaded bore, means rotatably supporting the upper end of said screw, a link pivotally connecting said movable block with the rear edge of the side plate adjacent said grooved leg, a reversible ratchet drive on the upper end of said screw and having a drive arm extending therefrom, a reciprocating motor connected to said drive arm,

- means for reversing the direction of travel of said motor to result in continuous reciprocation thereof when said motor is energized, and means for controlling the energization of said motor.

3. In an inclinable press, a press frame having side plates and being pivotally mounted between a pair of spaced upright stationary supporting legs, there being a vertical guide groove in the inner face adjacent the rear edge of one of said legs, a movable block having a threaded bore therethrough within said guide groove and restrained against lateral movement by the walls of said groove, a gib along one edge of said vertical groove to retain said block within said groove, there being a recess in the rear edge of the press frame. side plate adjacent said grooved leg, asecond block fixed within said recess, a link pivotally connecting said blocks, a screw within said guide groove and passing through the threaded bore of said movable block, means rotatably supporting the upper end of said screw, and means on said grooved supporting .legandrconnected to said screw to selectively rotate said screw in either direction.

4-. In an inclinable press, a press frame having side plates and being pivotally mounted between a pair of spaced upright stationary supporting legs, there being a vertical. guide groove in the inner face adjacent the rear edge of one of saidlegs, amovable block having a threaded bore-therethrough within said guide groove and restrained against lateral movement by the walls'of said groove, there being a recess in the real-edge of the press frame side plate adjacent said grooved leg, a second block fixed within said recess, a link pivotally connecting said movable and fixed blocks, a screw within said guide groove and passing'through said threaded bore of said movable block, means rotatably supporting the upper end of said screw, a reversible ratchet drive on the upper end of said screw and having a drive arm extending therefrom, a reciprocating motor connected to said drive arm, means for reversing the direction of travel of said motor to result in continuous reciprocation thereof when said motor is energized, and means for controlling the energization of said motor.

References Cited in the file of this patent UNITED STATES PATENTS Osswald Sept. 13, Anderson Oct. 12, Alinder et al. Oct. 14, Byerlein July 11, Johansen et al Mar. 20, Johansen Oct. 30, Nowak 1 May 20, Patrick July 8,

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