US2682218A - Press cylinder mounting means - Google Patents

Description

"" J. R. BAUMGARTNER PRESS CYLINDER MOUNTING MEANS 2 Sheets-Sheet 1 Filed Dec. 17, 1951 Fle.3

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ATTORNEYS June 1954 J. R. BAUMGARTNER 82,

PRESS CYLINDER MOUNTING MEANS Filed Dec. 17, 1951 2 Sheets-Sheet 2 7gb Fl :1. 8

. I INVENTOR.

M f mdp ATTORNEYS Patented June 29. 1954 UNITED STATES PATENT OFFICE 2,682,218 PRESS CYLINDER MOUNTING MEANS John R. Baumgartner, Milwaukee, Wis.

Application December 17, 1951, Serial No. 262,081

Claims. 1

The invention relates to printing presses and more particularly to a plate cylinder mountin arrangement.

In printing presses, it is often desirable to move the plate cylinder into and out of operative relation with the inking roll and to a less extent with the impression cylinder, and it is also desirable to be able to remove the plate cylinder completely from the press for putting on the printing forms. The object of the present invention is to provide an arrangement which meets both of the above requirements and especially to provide a yieldable or spring connection between the journal box of the cylinder and its hold down means so that the plate cylinder may have a limited movement to aposition out of contact With the inking roll and so that the compression of said spring means by the hold down means will hold the cylinder in an operative position. Also preferably the hold down means is a breech block pivotally mounted on the press frame so that it is always on the press, which breech block carries a cam lock to exert a hold down force on the spring means.

This application is a continuation in part of my oopending application Serial No. 202,709, filed December 26, 1950, now abandoned.

The invention further consists in the several features hereinafter set forth and more particularly defined by claims at the conclusion hereof. I

What I claim as my invention is:

Fig. 1 is a side elevational view of that portion of a printing press unit embodying the invention;

Fig. 2 is a front end elevation view of the press mechanism embodying the invention;

Fig. 3 is a detailed sectional view taken on the line 33 of Fig. 2, parts being broken away;

Fig. 4 is a detailed side elevation view taken along the line 44 of Fig. 2

Fig. 5 is a detailed perspective view of the plate cylinder lifting cam;

Fig. 6 is a detailed vertical sectional view taken on the line 6-6 of Fig. 2;

Fig. 7 is a detailed vertical sectional view taken on the line |--'l of Fig. 1;

Fig. 8 is a detailed vertical sectional view taken on the line 88 of Fig. 6;

Fig. 9 is a circuit diagram for the power throw out cylinder.

Referring to Figs. 1 and 2, the numeral [0 designates the side frame members of a printing press, H the plate cylinder, [2 the impresison cylinder, and I3 the inking roll supplied with ink from the fountain I4 by the fountain roll Ma.

The shafts for the above named cylinders and rolls are all suitably journalled in bearings carried by the frame or parts associated there- .with, but the present invention is only concerned with the mounting of the plate cylinder and will, therefore, be confined thereto. The plate cylinder H has shaft ends [5 which extend through bearing blocks or boxes I6 removably mounted in the frame members I0. One of the shaft ends extends through a bearing l I in one of the boxes 16 and has an outer extension carrying a gear 18 which meshes with an annular gear I 9 carried in a housing 2t having a drive shaft extension 2|. The other shaft end is journalled in a sleeve bearing 22 (see Fig. 7) mounted in a sleeve 23 fixed to the other block [8 and provided with a threaded extension 24 upon which a lock nut 25 and a feed nut 26 provided with a hand wheel portion 21 are mounted. The feed nut at its other end carries the outer race of a ball bearing journal 28 whose inner race is secured to the extended end 29 of the shaft end 15 by a clamping screw 30.

With the above arrangement the turning of the nut 26 in a direction to back ofi said nut from the extension 24 moves the plate cylinder toward the left so that the gear i8 may be moved longitudinally out of mesh with the gear I9 so as to disconnect the plate cylinder II from its drive and facilitate its removal from the frame of the press.

While only one of the bearing blocks I6 is shown in detail, each bearing block is slidably mounted and guided in an angled slot 3| formed in its associated frame member I0 by a tongue and groove connection in which the bearing block has centrally located oppositely disposed tongues 32 working in grooves 33 in opposite sides of the slot 3|. In operative position the bottom of each block it abuts the bottom of its slot 3|. The angular disposition of the slots 3| are such that a small outward or upward movement of the boxes It moves the plate cylinder ll out of contact with the inking roll l3 and the impression cylinder [2. As shown, the boxes 16 are disposed at an angle of thirty degrees to the horizontal. The slots 3| open up into the corner portions of the frame members iii. In each instance, the open end of the slot is closed by a breech block or swingable cap 34 pivoted on its frame member for movement into and out of its closed position.

Each block 34 is formed to provide a flat eccentrically disposed base hinge portion 35 and main portion having a depending right angled extension 36. A portion of the upper side of the slot 3| is cut off or formed to provide a surface 31 which extends at right angles to the slot and forms a bearing surface for the base portion 35 which is pivotally mounted relative thereto on a headed pin or stud 38 having threaded engagement at 39 with the frame member II and extending through differential bores 46 and 4| in the block which provide a bearing for the shank of the pin and its head. A detent in the form of a ball 42 and spring 43 mounted in a bore 44 in the block 34 is adapted to releasably engage one of the radially spaced depressions 45 in the surface 31 to hold said block in either a closed or open position.

In its closed position, each block 34 is operatively connected to its associated bearing block I6 by a relatively heavy spring 46 which bears at its inner end upon the top surface of the block I6 and is anchored at its upper or outer end to the shank of a cylindrical seat or head member 41 slidably mounted in a bore 48 extending centrally through the extension 36. The reduced diameter portion of the head of the member 41 bears against a cam member 49 rotatably mounted in a bore 56 intersecting the bore 48 and extending transversely of the block and carrying a hand crank The cam member 49 has a spring tensioning surface 52 and a relief surface 53 and has been shown in Figs. 1 and 6 in spring tensioning position. Swinging the crank 5| upwardly from the position shown brings the relief surface 53 under the head of the member 41 and relieves the spring 46 of its compression load and permits the block 34 to be swung outwardly from the frame member I I to a position in which the extension 36 clears the slot 3| so that the bearing block I6 at this end of the plate cylinder may be pulled upwardly and outwardly of the slot 3 I.

When the spring 46 is relieved of its load, its inner end may be moved inwardly above the bottom of the extension 36 by a light spring 54 interposed between the seat member 4'! and a sleeve 55 having a pressed fit in the lower end of the bore 48. With the cam 49 in holding position a predetermined compression load is imposed on the spring 46 which acts to hold the bearing block I6 down against the bottom of the slot 3|, and it also permits an outward movement of the block I6 as hereinafter described.

For removing the plate cylinder II from the press longitudinal movement of said cylinder in its bearings by the turning of the nut 26 moves the gear I8 out of mesh with its drive gear I9. Swinging of the cranks 5| to bring their cams 49 to a position in which the relief surfaces 53 are alined with the seat members 41 relieves the bearing boxes I6 of the holding pressures of the springs 46 and permits the blocks 34 to be swung about their pivots to open positions so that the bearing blocks I6 at the ends of the plate cylinder I I may be moved upwardly with said cylinder to a position clear of the slots 3| and then removed from the press for attaching the make ready thereto after which the blocks I6 are again replaced in the slots 3| and the blocks 34 then turned back to the closed position shown in Figs. 1 and 6 and the cranks 5| turned to bring the cams 49 to a spring loading position to hold the blocks I6 in operative position.

In printing presses, it is usual to provide some kind of a throw out or throw outs to disengage the associated cylinders of the press. In the present instance a throw out means is provided for the plate cylinder II which means includes the spring mounting of the bearing blocks for said cylinder as above described cooperating with a means for moving the blocks I6 outwardly to move the plate cylinder out of operative association with the inking roll I3 and the impression cylinder I2.

The means for moving the blocks I6 outwardly comprises a lever or cam shaft 56 journalled in the side frame members II and provided with spaced cam surfaces 51, each of which engages an associated thrust rod 58 slidably mounted in a bore 59 of the frame extending at an angle, here shown as forty-five degrees to the horizontal, and hearing at its outer end in a recess 60 in the bottom of the associated bearing block l6. With this arrangement swinging of the shaft 56 in a clockwise direction as viewed in Fig. 6 will cause the cam surfaces 51 to exert an outward thrust on the rods 58 and hence an outward thrust on the boxes I6 against the opposing forces of the springs 46 to move the boxes I6 outwardly an amount sufficient to move the cylinder free of the inking roll I3 and the impression cylinder I2. The cam shaft 56 may be manually or power operated. As shown, it has a crank 6| operatively connected to the rod 62 of a piston working in a double acting air cylinder 63 supplied with compressed air at the desired pressure through a pipe 64 and a control valve 65 of any suitable construction and shown in Fig. 9 as a piston valve, whose valve member 66 is moved in one direction by a spring 61 and in the other direction by a solenoid 68.

The solenoid 68 is energized from current supply lines 69 and III, the line I0 having the main line switch II and the plate cylinder motor switch I2 therein. The main drive motor M for the machine is connected in parallel with the lines 69 and I0 beyond the switch II. The drive motor M for the plate cylinder drive shaft extension 2| is connected in parallel across the lines 69 and III in back of the switch I2. With this arrangement the solenoid 68 is energized only if both switches II and I2 are closed and the plate cylinder motor M is running. When the solenoid 68 is energized, it moves the valve 66 to a position in which compressed air is supplied to the lower end of the cylinder 63 and the lever 56 is 'then brought to its inoperative position shown in Figs. 4 and 6. If during the operation of the press it is necessary to throw out the plate cylinder, the opening of the switch I2 deenergizes the solenoid 68 and the spring 61 then shifts the valve 66 to a position to supply compressed air to the upper end of the cylinder 63 and move the piston therein downwardly to swing the lever 56 as viewed in Fig. 6 clockwise to its throw out position. Also the opening of the switch TI to stop the press will deenergize the solenoid and similarly cause the swinging of the lever or cam shaft 65 to its throw out position. Thus whenever the press is stopped or the plate cylinder motor M is stopped, the plate cylinder II will be moved to a position clear of the inking roll I3 and the impression cylinder I2.

I desire it to be understood that this invention is not to be limited to any specific form or arrangement of parts except in so far as such limitations are included in the appended claims.

What I claim as my invention is:

1. In a printing press, the combination of spaced side frame members having alined open end slots, bearing blocks slidably keyed in said slots, a press cylinder journalled in said blocks, drive means for the press cylinder, a movable closure on each frame member for the open end of its slot, spring means carried by said closure and interposed between said closure and said bearing blocks in the closed position of the closure, movable means controlled by the operator and carried by each closure to compressively load its associated spring means in the closed position of said closure to hold the associated bearing block in operative position at the inner end of its mounting slot under a predetermined spring load, throw out means engageable with the sides of the bearing blocks at the bottoms of said slots for moving said bearing blocks and the press cylinder associated therewith against the load of said spring means to move said cylinder out of operative relation with other rolls of the press, a main drive electric motor for the machine, a drive electric motor for said press cylinder, a current supply circuit for said motors including out out switches, a fluid pressure actuator for said throw said supply circuit controlled by either of said out means, and electrically operated means in switches for rendering said actuator operative when either of said switches are opened.

2. In a printing press, the combination of spaced side frame members having alined open end slots, bearing blocks slidably keyed in said slots, a press cylinder journalled in said blocks and engageable with another cylinder of the press, drive means for said press cylinder, a closure block for each frame member having an eccentrically disposed side hinge portion pivotally mounted to swing on its associated side frame member adjacent said slot and having a depending right angled extension movable into and out of said slot, spring means mounted in a bore of said angled extension and engageablc at one end with the bearing block associated with said closure block, movable means carried by each closure block engageable with the other end of said spring means to compressibly load the same in the closed position of said closure block to hold the associated bearing block in operative position at the inner end of its mounting slot under a predetermined spring load, and throw out means engageable with the sides of the bearing blocks at the bottoms of said slots for moving the same and the press cylinder associated therewith against the load of said spring means to move said cylinder out of operative relation with said other press cylinder.

3. In a printing press, the combination of spaced side frame members having alined open end slots, bearing blocks slidably keyed in said slots, a press cylinder journalled in said blocks and engageable with another cylinder of the press, drive means for said press cylinder, a movable closure on each frame member for the open end of its slot, spring means interposed between said closures and said bearing blocks in the closed positions of said closure, movable means controlled by the operator and carried by each closure to compressively load its associated spring means in the closed position of said closure to hold the associated bearing block in operative position at the inner end of its mounting slot under a predetermined spring load, and throw out means including an oscillatory shaft extending transversely through said side frame members and having spaced flat cam faces working within the confines of said frame members, thrust rods, each slidably mounted in a bore in its associated side frame member extending between said shaft and the block in said frame member and in thrusting engagement with the cam face on said shaft and a portion of the bottom of the bearing block to be moved, the axis of each thrust rod being alined with the axial line passing through the centers of said oscillatory shaft and the shaft for said press cylinder.

4. In a printing press, the combination of spaced side frame members having alined open end slots, bearing blocks slidably keyed in said slots, a press cylinder journalled in said blocks and engageable with another cylinder of the press, drive means for said press cylinder, an angled closure block for each slot having a side hinge portion pivotally mounted on its associated side frame member, a spring mounted in each angled block for engagement with its associated bearing block, a rotary cam mounted in each angled block for conigiressively loading said spring in the closed position of said closure block to hold the associated bearing block in operative position at the inner end of its mounting slot under a predetermined spring load, and throw out means engageable with the sides of the bearing blocks at the bottoms of said slots for moving the same and the press cylinder associated therewith against the load of said springs to move said cylinder out of operative relation with said other press cylinder. 7

5. In a printing press, the combination of spaced side frame members having alined open end slots, bearing blocks slidably keyed in said slots, a press cylinder journalled in said blocks and engageable with another cylinder of the press, drive means for said press cylinder, a movable closure on each frame member for the open end of its slot and provided with a bore having differential diameters, a spring mounted in the bore of its associated closure for engagement with its associated bearing block and carrying a head, a rotary cam mounted in each closure and having a release position and adapted to engage its associated head to cornpressively load its associated spring in the closed position of said closure to hold the associated bearing block in operative position at the inner end of its mounting slot under a predetermined spring load, a second spring interposed between said head and the portion of the bore of larger diameter in its associated closure to move said first named spring to an inoperative position when said rotary cam is in its release position, and throw out means engageable with the sides of the bearing blocks at the bottoms of said slots for moving said bearing blocks and the press cylinder associated therewith against the loads of said springs to move said cylinder out of operative relation with said other press cylinder.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 751,946 Shoening Feb. 9, 1904 1,089,740 Barber Mar. 10, 1914 1,582,939 Harrold Apr. 29, 1926 1,587,502 Blaine et al June 8, 1926 1,975,631 Brawn Oct. 2, 1934 2,231,839 Ritzerfeld Feb. 11, 1941 2,432,133 Babicz Dec. 9, 1947 2,539,965 Moss et a1 Jan. 30, 1951

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